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  • 1970-1974  (2,241)
  • 1973  (2,241)
  • Polymer and Materials Science  (2,161)
  • Ultrastructure  (80)
  • 1
    Electronic Resource
    Electronic Resource
    Electron microscopic visualization of proteoglycans and collagen in bovine costal cartilage (1973)
    Springer
    Calcified tissue international 13 (1973), S. 83-92 
    Details
    ISSN: 1432-0827
    Keywords: Proteoglycan ; Collagen ; Cartilage ; Electron Microscopy ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé L'élimination de protéoglycans solubles de coupes de cartilage costal de boeuf, par extraction dans une solution de 4M d'hydrochlorure de guanidinium, permet de mettre en évidence des quantités abondantes de collagène dispersé et désagrégé dans la matrice. Les protéoglycanes, résistants à l'extraction, sont visibles sous forme de granules concentrés dans les régions périlacunaires. Les granulations plus importants des protéoglycanes semblent venir du chondrocyte. Dans la matrice, éloignée des chondrocytes, ces granules deviennent plus étroites. Un composant non granulaire “amorphe” masque les fibres de collagène, de telle sorte qu'elles sont difficilement visibles dans le cartilage intact.
    Abstract: Zusammenfassung Die löslichen Proteoglycane wurden mittels Extraktion in 4 M Guanidinhydrochlorid aus Rippenknorpelschnitten des Rindes entfernt. Dies erlaubte die Sichtbarmachung von großen Mengen von verstreuten und auseinandergerissenen Collagen in der Matrix. Die Protoglycane, welche sich nicht extrahieren lassen, erscheinen als kleine, in den perilacunären Regionen konzentrierte Körnchen. Die großen Proteoglycan-Körner scheinen in den Chondrocyten zu entstehen. Sobald sie sich in die Matrix, außerhalb der Chondrocyten, verlagern, werden die Körner kleiner. Ein nicht-granulärer, „amorpher” Bestandteil verhüllt die Collagenfasern, so daß diese im intakten Knorpel nicht deutlich gesehen werden können.
    Notes: Abstract Removal of the soluble proteoglycans from slices of bovine costal cartilage by extraction in 4 M guanidinium hydrochloride permitted the visualization of abundant amounts of dispersed and disaggregated collagen in the matrix. Proteoglycans which are resistant to extraction are seen as small granules which are concentrated in the perilacunar regions. Large proteoglycan granules appear to originate in the chondrocyte. As they come to occupy positions in the matrix distant from the chondrocyte, the granules become smaller. A non-granular, “amorphous” component masks the collagen fibers so that they cannot be readily seen in the intact cartilage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02015399
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructural aspects of the preattached pig embryo: Cleavage and early blastocyst stages (1973)
    Springer
    Anatomy and embryology 143 (1973), S. 95-114 
    Details
    ISSN: 1432-0568
    Keywords: Cleavage stages ; Blastocyst ; Pig ; Nucleus ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ultrastructural observations of morphological changes in nuclei and cytoplasm of pig embryos during cleavage and early blastocyst stages are presented. Compact nuclear bodies (nucleosphaeridies) are demonstrable in the cleavage stages, and occasionally in the inner cell mass of blastocysts. The transformation of nucleosphaeridies leading to the formation of a peripheral network are usually found at the eight-cell stage. In morula, nucleoli make their first appearance as clearly distinguishable morphological entities. A marked disorganization of nuclear envelope is observed near to the cytoplasmic annulate lamellae (CAL) indicating a possible process of transformation of the former to the latter. During premorula stages cytoplasmic organelles (Golgi complex, endoplasmic reticulum, and CAL) are predominantly concentrated around the nucleus. CAL associated with fibrillogranular material similar to the material of the nucleoplasm occur in juxtanuclear positions. In the two-cell stage, degenerating paternal mitochondria are observed. In the morula the number of spherical mitochondria fell while that of elongated mitochondria increase. The trophoblast cells of the blastocyst stage contain cytoplasmic microfilaments which are closely associated with cell organelles, particularly the desmonsomes. Structurally changed mitochondria near the yolk globules and inclusion bodies of various morphology are found. A basal lamina is discernible parallel to the trophoblast layer facing the blastocoel. The observations are discussed in relation to physiological phenomena known to occur during embryogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519913
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  • 3
    Electronic Resource
    Electronic Resource
    Uterine stromal morphology of the spayed, virgin rat when prepared with progesterone and oestrogen for implantation (1973)
    Springer
    Anatomy and embryology 141 (1973), S. 161-169 
    Details
    ISSN: 1432-0568
    Keywords: Rat ; Uterus ; Stroma ; Ultrastructure ; Sex steroids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of progesterone and oestrogen on the central uterine stroma has been examined in order to analyze what changes occur when the uterus is hormonally prepared for implantation. Both progesterone and oestrogen, when given separately, cause nucleolar enlargement and growth of the granular endoplasmic reticulum. However, after progesterone treatment the nuclei are large and spherical whereas they are spindle-shaped after oestrogen treatment. When oestrogen is administered to the progesterone-treated rat little change occurs in the stromal morphology. There is little morphological support to the view that oestrogen acts on the stroma to increase endometrial sensitivity. Further, progesterone seems to stimulate the synthesis of RNA and of cellular protein only in the stromal cell while oestrogen has a similar effect in all cell types of the uterus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519883
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  • 4
    Electronic Resource
    Electronic Resource
    Licht- und elektronenmikroskopische Untersuchungen an den peritubulären Zellen des Schweinehodens während der postnatalen Entwicklung (1973)
    Springer
    Anatomy and embryology 143 (1973), S. 49-64 
    Details
    ISSN: 1432-0568
    Keywords: Testicular peritubular cells ; Boar ; Postnatal development ; Ultrastructure ; Contractility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Membrana propria der Hodentubuli des Schweines zeigt einen deutlichen Schichtenbau: Auf die Basalmembran des Tubulusepithels (a) folgen eine nicht-celluläre Lage mit Kollagenfibrillen (b), die von einer inneren (c) und einer äußeren (e) Basalmembran umhüllten peritubulären Zellen (d) und dann das intertubuläre lockere Bindegewebe (f). Die ausdifferenzierten peritubulären Zellen haben viele morphologische Merkmale mit glatten Muskelzellen gemeinsam. So besitzen sie Plasmalemmeinbuchtungen in Form pinocytotischer Bläschen sowie eine große Anzahl von Filamenten mit einem Durchmesser von 60–70 Å, welche über elektronendichte Strukturen an der Innenseite des Plasmalemms befestigt sind. Ein Golgi-Apparat, rauhes endoplasmatisches Reticulum, Mitochondrien und Mikrotubuli bevorzugen eine kernnahe Position. Im Gegensatz zu den Verhältnissen bei anderen Species sind viele charakteristische Eigenschaften der peritubulären Zellen schon vor der Pubertät ausgebildet. Die Filamente können bereits am 4. Tag als feines Netzwerk beobachtet werden, sie erfahren am 25. Tag eine starke Vermehrung und sind von nun an regelmäßig orientiert. Auch andere Befunde sprechen dafür, daß die peritubulären Zellen um den 25. Tag eine gesteigerte Aktivität entfalten. Die histochemisch nachgewiesenen Konzentrationen von alkalischer Phosphatase, Adenosintriphosphatase und Glucose-6-phosphatase erreichen zu diesem Zeitpunkt die hohen Werte, die auch für die weitere Entwicklungsphase und die ausdifferenzierten peritubulären Zellen typisch sind. Pinocytotische Bläschen erscheinen in größerer Anzahl ab dem 97. Tag. Mit dem 140. Tag sind die peritubulären Zellen morphologisch ausdiffrenziert.
    Notes: Summary The boundary tissue of the porcine testicular seminiferous tubule (membrana propria) exhibits a distinct stratification: the basement lamina of the tubular epithelium (a) is followed by a non-cellular layer with collagen fibrils (b), the peritubular cells (d) with an inner (c) and outer (e) basement lamina and finally the intertubular loose connective tissue (f). Fully developed peritubular cells have many morphological features in common with smooth muscle cells, for instance inpocketings of the plasmalemma (pinocytotic vesicles) and a great number of filaments measuring 60–70 Å in diameter. These filaments are fixed at the inner side of the plasmalemma by means of electron-dense structures. The Golgi apparatus, rough endoplasmic reticulum, mitochondria and microtubules prefer a juxtanuclear position. In contrast that is seen in other species the porcine peritubular cells develop many of their characteristic features before puberty. In samples of the 4th day a fine network of filaments is already visible within the cytoplasm. These filaments are strongly augmented at the 25th day, and from now on they are arranged in a regular fashion. Other findings, also, underline an increased activity of the peritubular cells around day 25. At that time the concentrations of histochemically demonstrated alkaline phosphatase, adenosine triphosphatase and glucose-6-phosphatase reach the high levels typical for the stages of further development and the fully differentiated cells. Pinocytotic vesicles appear in great numbers from day 97. At the 140th day the morphology of the porcine peritubular cell is completely developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519910
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  • 5
    Electronic Resource
    Electronic Resource
    The early development of the median thyroid gland of the mouse (1973)
    Springer
    Anatomy and embryology 139 (1973), S. 319-336 
    Details
    ISSN: 1432-0568
    Keywords: Fetal thyroid ; Microfilaments ; Lysosomes ; Acid phosphatase ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The mesobranchial area and the median thyroid anlage of embryonic albino mice were investigated from the somite stage 4 to 40 (81/2–10 days of gestation). In stage I (5–25 somites), there is an unequal growth and differentiation of the epithelium in the floor of the pharynx, whereby a mesobranchial area with a stratified or pseudostratified epithelium is formed. This area is distinct from the remaining pharyngeal epithelium, among other things by an apical microfilament system in the superficial epithelial cells. It is found just basal to a row of plump cytoplasmic protrusions, which extend into the lumen of the pharynx. In stage II (26–40 somites), the cranial part (median thyroid anlage) of the mesobranchial area thickens in relation to the caudal part and grows down into the underlying mesenchyme. The filament system is concentrated in the superficial cell layer of the median thyroid anlage at the beginning of stage II and disappears during downgrowth. In both stages, but most pronounced in stage II, there is a population of 0.1–5 μ intracellular bodies, which occasionally contain the remains of organelles. The larger bodies, which often contain the remains of nuclei, are usually found peripherally while the smaller ones are more evenly distributed. Acid phosphatase can often be demonstrated histochemically in small bodies, while larger bodies are usually without reaction. Cells with pycnotic nuclei and/or degenerated cytoplasmic components are regularly found. Acid phosphatase can also be demonstrated in Golgi complexes and surrounding vesicles. Basal to the epithelium, bodies are occasionally found which may possibly have been extruded from that tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519971
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  • 6
    Electronic Resource
    Electronic Resource
    Electron microscopic study of the muscle changes in diabetic amyotrophy (1973)
    Springer
    Acta neuropathologica 24 (1973), S. 331-339 
    Details
    ISSN: 1432-0533
    Keywords: Diabetic Amyotrophy ; Muscle Biopsy ; Ultrastructure ; Type II Fibre Atrophy ; Partial Denervation ; Neurogenic Atrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Seven cases of diabetic amyotrophy were investigated by histochemistry and electron microscopy of biopsied muscles. Type II fibre atrophy of various grades was observed in the proximal atrophic muscles. Various changes of Z-band were observed in type II atrophic muscle fibres. In addition, mitochondrial changes, accumulation of glycogen, thickening of the capillary basement membrane and changes in the intramuscular nerves were also observed, both in the proximal and distal muscles. Some impaired motoneuron innervation of proximal muscles as well as distal muscles in a poorly controlled diabetic condition is suspected in “diabetic amyotrophy”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00685588
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  • 7
    Electronic Resource
    Electronic Resource
    Ultrastructure of a sacrococcygeal chordoma (1973)
    Springer
    Acta neuropathologica 25 (1973), S. 27-35 
    Details
    ISSN: 1432-0533
    Keywords: Ultrastructure ; Chordoma ; Sacrococcygeal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructure of a sacrococcygeal chordoma is presented. The cells vary in their size and electron density but are thought to have a common origin. The nuclei presented prominent nucleoli and intranuclear bodies. Centrioles were seen in some of the cells. The rough endoplasmic reticulum was prominent and in most cells was very distended and corresponded to the intracellular vacuoles of light microscopy. The contents of the rough endoplasmic reticulum and the abundant extracellular substance were similar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00686855
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  • 8
    Electronic Resource
    Electronic Resource
    Ultrastructural analysis of phospholipase a induced changes in membranes of synaptic regions in rat motor cortex (1973)
    Springer
    Experimental brain research 16 (1973), S. 400-409 
    Details
    ISSN: 1432-1106
    Keywords: Ultrastructure ; Synapses ; Brain cortex ; Phospholipase A ; Membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of purified Naja nigricollis phospholipase A on slices from motor cortex from rat brain was analysed at an ultrastructural level. Samples stabilized directly with glutaraldehyde were compared with samples incubated in buffer with or without enzyme. Plasma membranes of nerve terminals, synaptic contact regions and synaptic vesicles were the main parameters studied. As judged by the electron microscopic technique the synaptic areas show a high resistance to the enzyme treatment. The intercellular space of the synaptic cleft seems unaltered. At the highest concentrations of the enzyme an increased density is noticed at the presynaptic part of the membrane. The extracellular space widens and nerve terminals and mitochondria become distended with increasing enzyme concentrations. The membranes all through the tissue appear ruptured to small pieces and at the highest enzyme concentrations used, altered in their structural organization. Quantitative analysis shows that the number of synaptic vesicles per unit surface area decreases, while ruptures of the plasma membranes of nerve terminals increase in number with increasing enzyme concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233431
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  • 9
    Electronic Resource
    Electronic Resource
    Ultrastructure of herpes simplex virus infection of the nervous system of mice (1973)
    Springer
    Acta neuropathologica 26 (1973), S. 285-299 
    Details
    ISSN: 1432-0533
    Keywords: Herpes simplex Virus ; Ultrastructure ; Viral Infection ; Virus-Host Interaction ; Nervous System
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The nervous system and small intestine of mice infected with herpes simplex virus were examined by electron microscopy from the viewpoint of virus-host interaction. The host cells examined included the neuron, astrocyte, oligodendrocyte, and Schwann cell. The susceptibility of the latter was not less than that of the neuron. The endothelial cell, perineural fibrocyte and smooth muscle cell were also host cells. Replication of herpes virus in the nervous system was proven to be identical to that occurringin vitro; initial reproduction of nucleocapsids in the nucleus and subsequent maturation at the nuclear membrane with envelope formation, followed by discharge into the cytoplasmic reticular cavities and finally release from the host cell. Inconsistency in the distribution of virus particles and viral antigen was chiefly concerned with the host cell nucleus and the glial cytoplasm. Herpes virions, though few, were identified in the axons of peripheral nerves, and in the periaxonal space of myelinated fibres in the brain and the nerve ganglia. Virions were present in tiny vesicles in the perikarya or as naked particles. In the distal parts of peripheral nerve, there was marked dissociation in the amount of virions between Schwann cells and the axon. The significance of the endoneural space and the axon in the neural speread of infection is discussed briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688077
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  • 10
    Electronic Resource
    Electronic Resource
    The ultrastructural arrangement of thrombosthenin in glycerol extracted thrombocytes (1973)
    Springer
    Cell & tissue research 138 (1973), S. 557-567 
    Details
    ISSN: 1432-0878
    Keywords: Thrombocytes ; Thrombosthenin ; ATP ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of glycerol extracted thrombocyte models was studied before and after incubation with ATP and under the influence of Salyrgan as inhibitor of contraction. The contractile system of the thrombocytes—thrombosthenin—consists of a spatial network of 50 Å wide thrombosthenin A and 100–120 Å wide thrombosthenin M filaments. At rest, the contractile system is arranged in a marginal zone. The ATP-induced contraction led to a concentric condensation of the network which resulted in a central cluster of cell organelles and at a later stage, disruption of the plasma membrane and release of the thrombocyte granules. All these changes which also occur during the formation of the hemostatic plug in vivo are therefore attributed to the reaction of the contractile protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572296
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  • 11
    Electronic Resource
    Electronic Resource
    Corticotrophic cells in the rostral zone of the pars intermedia and in the adjacent neurohypophysis of the rat and mouse (1973)
    Springer
    Cell & tissue research 136 (1973), S. 97-110 
    Details
    ISSN: 1432-0878
    Keywords: Hypophysis ; Mouse, rat ; Pars intermedia, rostral zone ; Corticotrophic cells ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the mouse, the rostral zone of the pars intermedia is almost exclusively composed of typical corticotrophic cells. They are located around and even within the neural stalk, at the level of transition between stalk and neural lobe. In the rat, the corticotrophic cells of the rostral zone are found in scattered islets among the MSH producing cells, and also in the neural lobe. In both the rat and mouse, these cells are in direct contact with various types of nerve terminals. Synaptoid contacts with aminergic and neurosecretory nerve fibers are observed. Furthermore they are also closely related to the hypophysial portal vessels. Following adrenalectomy, the cells located in the neurohypophysis always react more intensely than tose in the rostral zone. The functional significance of these corticotrophic cells which are subject to both humoral and neural regulation remains as yet hypothetical. Their participation in neurogenic stress response seems probable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307682
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  • 12
    Electronic Resource
    Electronic Resource
    Quantitative data on the fine structural organization of the palisade zone of the median eminence (1973)
    Springer
    Cell & tissue research 136 (1973), S. 111-120 
    Details
    ISSN: 1432-0878
    Keywords: Median eminence ; Rat ; Granular vesicles ; Ultrastructure ; Quantitative evaluation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In order to characterize different sub-zones in the palisade zone of the rat median eminence, quantitative ultrastructural parameters were applied to brains fixed in aldehyde-osmium tetroxide. The palisade zone has been subdivided in 4 successive sub-zones. Increasing numbers of granular vesicles (GV), especially those smaller than 110 nm, are observed from dorsal to ventral sub-zones. There also are more GV per unit area of nervous tissue in the perivascular than in the more dorsal sub-zones. The individual nerve profiles exhibit a larger size in the perivascular layer than in the more dorsal areas, whereas the number and size of nerve profiles devoid of vesicles diminish from dorsal to ventral. As a consequence more GV occur in the perivascular nerve profiles. In the GV containing nerve profiles the concentration of GV is, however, constant in the different sub-zones. A fluctuating size of the preterminal and terminal parts of the nerve fibres is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307683
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  • 13
    Electronic Resource
    Electronic Resource
    Studies on the fine structure of the protozoan Cyclidium, with special reference to the mitochondria, pellicle and surface-associated bacteria (1973)
    Springer
    Cell & tissue research 139 (1973), S. 303-310 
    Details
    ISSN: 1432-0878
    Keywords: Protozoa ; Bacteria ; Association ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of Cyclidium, including the cilia, kinetosomes, pellicle, microtubules and kinetodesmal fibers is similar to that recorded for other ciliates. Of special interest is the attachment of rod-shaped bacteria within the longitudinally directed shallow surface folds of the protozoan. Both the bacteria and the surface of Cyclidium seem to possess an outer coating of a sticky substance which upon contact holds the bacteria to the protozoan. The bacteria appear to be attached by only a relatively small area of their surfaces. A dense substance appears within the alveolus of the pellicle at the regions of the attachment of the bacteria. The association of the organisms is probably a temporary one, and it is unknown whether either organism is benefited or harmed by the association. The position of the mitochondria in Cyclidium is unusual in that they all lie flattened against the inner membrane of the pellicle, usually in a position directly opposite to that of the attachment of the bacteria to the surface, thus being separated from the bacteria by only the outer cell membrane and the pellicle. Whether or not this close topographical relationship is of significance is unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306587
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  • 14
    Electronic Resource
    Electronic Resource
    The effect of salinity acclimation on the ultrastructure of the gills of Gammarus oceanicus (Segerstråle, 1947) (Crustacea: Amphipoda) (1973)
    Springer
    Cell & tissue research 139 (1973), S. 311-318 
    Details
    ISSN: 1432-0878
    Keywords: Gill ; Gammarus oceanicus ; Salinity acclimation ; Ultrastructure ; Mitochondria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Acclimation to low salinity induces changes in the ultrastructure of the gill cells of the marine euryhaline amphipod, Gammarus oceanicus. The gills are composed of a single cell type. In 100% artificial sea water, these cells contain moderate numbers of mitochondria which are randomly distributed in the cytoplasm. The plasma membrane is extensively invaginated at the apical, lateral, and basal surfaces. Acclimation to 20% artificial sea water induces a further invagination at the apical cell membrane to form an elaborate apical labyrinth. The extracellular spaces between the folds in the basal cell membrane dilate to 1500 Å or more. Mitochondria are more abundant and in many cells they undergo a change in conformation. The mitochondria are crowded into thin leaflets of cytoplasm between the dilated basal invaginations or into the narrow space between apical and basal cell membranes. Consequently, they lie in close contact with the plasma membrane over much of their surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306588
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  • 15
    Electronic Resource
    Electronic Resource
    Zur Feinstruktur des dorsalen Riesenfasersystems im Bauchmark des Regenwurms (1973)
    Springer
    Cell & tissue research 139 (1973), S. 351-368 
    Details
    ISSN: 1432-0878
    Keywords: Lateral giant cells ; Dorsal giant fibres ; Earthworm, Lumbricus terrestris L. ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die Feinstruktur der segmental angeordneten Somata der dorsalen Riesenfasern im Bauchmark des Regenwurms Lumbricus terrestris L. (Günther, 1969) wird beschrieben und mit der Struktur anderer Neuronen von Vertebraten und Evertebraten verglichen. Die paarigen lateralen Riesenzellen (LRZ) sind im Gegensatz zu der unpaaren medianen Riesenzelle (MRZ) häufig multipolare Neuronen, die bis zu vier Faserfortsätze aufweisen können. Das perikaryale Cytoplasma zeigt helle und dunkle Areale. Organellen und andere Zelleinschlüsse finden sich ganz überwiegend in den dunklen osmiophilen Zonen und lassen regelmäßig eine bestimmte Anordnung erkennen. So ist häufig eine ringförmige Verteilung von Golgi-Feldern um den gelappten Kern vorhanden. Mitochondrien sind häufig in einem typischen „Axonhügel-Komplex“ angeordnet. Freie Ribosomen dominieren gegenüber membrangebundenen. Diese Neuronen sind reich an Glykogen, das oftmals ausgedehnte Felder einnimmt. Vereinzelt weisen die LRZ Faser-Soma-Synapsen auf.
    Notes: Summary The structure of the segmentally arranged somata of the dorsal giant fibres Günther, 1969) in the ventral nerve cord of the earthworms Lumbricus terrestris L., is described. These neurones are compared with other neurones of invertebrates and vertebrates. The paired lateral giant cells (LGC) are often multipolar in contrast to the single unipolar median giant cell (MGC). Up to four fibres originate from each LGC. The dotted appearance of both these neurones (clear and dark perikaryal areas) is due to the regular distribution of osmiophilic strands of cytoplasm containing the majority of organells and other inclusions (e.g. endoplasmatic reticulum and ribosomes). The majority of ribosomes are not associated with membranes but are found scattered freely in the cytoplasm. A typical “axon hillock” with an accumulation of mitochondria is often found. The cells show large deposits of glycogen. Some of the LGC-somata have synaptic contacts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306591
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  • 16
    Electronic Resource
    Electronic Resource
    Die Anordnung der Ommatidien in der Retina der Biene (Apis mellifica L.) (1973)
    Springer
    Cell & tissue research 139 (1973), S. 567-582 
    Details
    ISSN: 1432-0878
    Keywords: Compound Eye ; Apis mellifica ; Polarized light ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung 1. Die Ausrichtung der Rhabdome ist in der Bienenretina nicht konstant. 2. Die Anordnung der exzentrischen Zellen in der Bienenretina ist ebenfalls nicht konstant, und es läßt sich keine symmetrische Verteilung dieser Zellen nachweisen. 3. Die Morphologie der Retina wird im Hinblick auf die Orientierung der Honigbiene nach dem Polarisationsmuster des vom blauen Himmel reflektierten Lichtes diskutiert.
    Notes: Summary 1. The orientation of the rhabdoms shows no regularity within the retina of the honeybee. 2. The arrangement of the eccentric cells is also irregular within the retina of the honeybee. 3. The morphology of the retina is discussed regarding the ability of the honeybees to orient according to the pattern of the polarization of light reflected from the blue sky.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02028393
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  • 17
    Electronic Resource
    Electronic Resource
    Le Système Nerveux des Cténaires (1973)
    Springer
    Cell & tissue research 137 (1973), S. 223-250 
    Details
    ISSN: 1432-0878
    Keywords: Nervous system ; Ctenophores ; Nerve-net, Nervous concentration ; Synapses ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A subectodermal nerve-net is demonstrated in ten species of Ctenophores by means of either Methylene Blue vital staining or silver impregnation. There is no evidence of subendodermal nerve-net. The ectodermal nerve-net displays a characteristic polygonal pattern which is thought to result from morphogenetic events. Both bipolar and tripolar neurones occur. Three types of concentrations of nervous tissue are described: a) a high accumulation of nervous perikarya at the aboral sensory pole; b) a noticeable densification of the net along the eight meridional ciliary strands of every species, and around the lips of Beroidea; c) in the Cydippids Pleurobrachia and Hormiphora two thick strands of fibers and neurones interconnecting the aboral organ and the tentacles: the tentacular nerves. Ultrastructural evidence is given for the presence of nervous elements under and amidst ectodermal epithelial cells. Three features allow the recognition and characterization of neurites and neurones: a) numerous clear and/or granulated vesicles; b) microtubules in variable amounts; c) frequent and highly differentiated synaptic contacts. The very peculiar arrangement of the presynaptic elements is observed in all the species of Ctenophores so far studied. These synaptic contacts suggest chemical transmission in the nerve-net. On the basis of ultrastructural evidence the author refutes the nervous nature previously attributed to the ciliated cells of the meridional grooves. A parallel is drawn between nervous systems of Cnidaria and Ctenophora.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307432
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    Electronic Resource
    Electronic Resource
    Electron microscopy of dental enamel: Analysis of crystal lattice images (1973)
    Springer
    Cell & tissue research 137 (1973), S. 271-280 
    Details
    ISSN: 1432-0878
    Keywords: Dental enamel ; Rat ; Ultrastructure ; Crystallography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Thin sections of rat incisor enamel were studied with the electron microscope. Fringe patterns having repeat periods in the range 3.1–8.2 Å were seen in individual enamel crystals. These images were interpreted as representing the resolution of corresponding planes in the hydroxyapatite crystal lattice. The lattice spacings and interplanar angles were identified by comparing the observations with available data derived from X-ray diffraction analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307434
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  • 19
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    Electronic Resource
    Ultrastructure of the pars distalis of the lizard Anolis carolinensis with special reference to the identification of the gonadotropic cell (1973)
    Springer
    Cell & tissue research 137 (1973), S. 293-312 
    Details
    ISSN: 1432-0878
    Keywords: Hypophysis ; Pars distalis ; Lizard ; Gonadotropic cell ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Five categories of granulated cells were distinguished by their ultrastructural features, and quantitative analyses were made of the pars distalis cells in normal and castrated lizards. The gonadotropin-producing cell was identified on the basis of its uniform distribution in the gland as well as from cytological changes resulting from castration. The secretory granules of the gonadotropic cell vary in size (100–500 mμ) and density, and lipid bodies are commonly present. Following castration, the endoplasmic reticulum proliferates, forming many small, rough-surfaced, dilated cisternae which do not coalesce greatly as in other vertebrate species. Degranulation is accompanied by hypertrophy and hyperplasia of the mitochondria and by the appearance in the cytoplasm of conspicuous clusters of microfilaments. The designated gonadotropic cell was the only class of secretory cell showing consistent changes following three weeks of castration. In addition to the uniformly distributed gonadotrope cell, two secretory cells occur mainly in the rostral half of the gland, and two in the caudal half. Tentative identification of the cell types is discussed in the light of available information on the localization of the hormones in the pars distalis of this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307205
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  • 20
    Electronic Resource
    Electronic Resource
    Smooth muscle-like cells in ovaries of the hamster and gerbil (1973)
    Springer
    Cell & tissue research 140 (1973), S. 1-8 
    Details
    ISSN: 1432-0878
    Keywords: Ovary ; Smooth muscle ; Hamster ; Gerbil ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Smooth muscle-like cells are present in thecae externae, corpora lutea, and interstitial tissue of hamsters and gerbils. The smooth muscle-like cells, as examined by electron microscopy, are fusiform with central nuclei; the cytoplasm contains numerous myofilaments, dense bodies, micropinocytotic vesicles, and dense accumulations of glycogen-like particles. In addition to the smooth muscle-like cells, fibroblasts and cells that have characteristics of both fibroblasts and smooth muscle are located in the thecae externae of both species. There is no ultrastructural evidence of innervation in the theca folliculi, corpora lutea, or interstitial tissue of either species. A possible function for the smooth muscle-like cells is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307055
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  • 21
    Electronic Resource
    Electronic Resource
    Associations jonctions-organites cellulaires dans le foie néo-natal de souris (1973)
    Springer
    Cell & tissue research 140 (1973), S. 77-89 
    Details
    ISSN: 1432-0878
    Keywords: Intercellular junctions ; Neonatal liver ; Mouse ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Au cours du passage de la vie foetale à la vie postnatale, on note, dans le foie de souris, l'apparition d'associations jonctions-organites cellulaires. Celles-ci cont de deux types: associations desmosomes-organites et associations nexus-organites. 1.Associations nexus-organites. Le long de la «gap junction» sont étroitement accolés, uni ou bilatéralement, divers organites: mitochondrie(s), subsurface cisterna(e), peroxysome(s) ou lysosome. Ces associations n'apparaissent qu'entre le 21ème jour de la gestation et le ler jour post-natal, période à partir de laquelle ils disparaissent au profit d'associations desmosomes-organites cellulaires. Un nouveau type de structure s'associe dans le foie aux membranes plasmatiques: il s'agit des saccules ergastoplasmatiques ou subsurface cisternae. 2.Associations desmosomes-organites. Dans ces complexes, les tonofilaments desmosomiques entrent étroitement en contact avec la paroi des organites cellulaires associés: mitochondrie ou peroxysome. Déjà présents au 13ème jour de la gestation, ces structures s'observent plus fréquemment à partir du ler jour post-natal. La signification de ces associations reste à déterminer, d'autant plus que leur présence a déjà été signalée dans de trés nombreux tissus. Quelques hypothèses sont présentées.
    Notes: Summary During the transition between the fetal and postnatal periods associations between cell junctions and cell organelles appear in the liver of the mouse. These associations are of two types: desmosome-organelle and nexus-organelle. 1.Nexus-Organelles Association. Unilaterally or bilaterally, various organelles — mitochondria, cysternae, microbodies or lysosomes — adhere tightly along the gap. These associations appear only between the 21st day of gestation and the first postnatal day. Thereafter they gradually disappear and are replaced by desmosome-organelle associations. Another type of structure — ergastoplasmic saccules or cisternae of rough endoplasmic reticulum — become associated with the cell membrane. 2.Desmosome-Organelle Associations. In these complexes the desmosomal microfilaments are in close contact with membranes of the associated organelles — mitochondria or peroxysomes. The associations, which exist as early as the 13th day of gestation increase after the first postnatal day. The significance of these associations remains to be ascertained, especially since they occur in many other tissues. A few hypotheses are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307059
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  • 22
    Electronic Resource
    Electronic Resource
    Fine structural alterations with age in the fat body of the adult male housefly, Musca domestica (1973)
    Springer
    Cell & tissue research 140 (1973), S. 169-175 
    Details
    ISSN: 1432-0878
    Keywords: Fat body ; Housefly ; Aging ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fat body of the adult housefly is composed of two types of cells, the lipid-and glycogen-rich fat body cells and the oenocytes. A comparison of the fine structure of the abdominal fat body in 4-day old and 31–35 day old male houseflies indicated an increase in lipid and a decrease in glycogen content in the fat body cells of old flies. Oenocytes of old flies exhibit deteriorative alterations with an accumulation of secondary lysosomes. Both fat body cells and oenocytes in senile flies are ingested by hemocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306692
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  • 23
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    Electronic Resource
    L'innervation du lophophore chez le Bryozoaire chilostome Electra pilosa (L.) (1973)
    Springer
    Cell & tissue research 140 (1973), S. 217-234 
    Details
    ISSN: 1432-0878
    Keywords: Tentacles ; Electra pilosa ; Nerves ; Bielschowsky technique ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Le trajet des grands nerfs de la couronne tentaculaire et la structure du collier nerveux péripharyngien dont ils se détachent, ont été précisés chez Electra pilosa par des imprégnations argentiques in toto selon la technique de Bielschowsky et par une étude d'ultrastructure. Chaque tentacule est innervé par quatre faisceaux nerveux, dépourvus d'envelope gliale, qui courent entre l'épithélium et l'assise collagène qui délimite le canal tentaculaire interne; trois sont rassemblés sous les trois rangées cellulaires épithéliales de l'arête orale du tentacule et le quatrième est médian-dorsal. Les cellules épithéliales orales-latérales, par leur forme pédonculée, par la densité de leur cytoplasme, par leur cil unique et par leur relation topographique et cytologique avec les nerfs tentaculaires sous-jacents, présentent des adaptations structurales telles qu'il parait probable qu'elles assurent une fonction tactile. L'examen du collier péripharyngien montre son caractère organisé et la complexité des connexions qui coordonnent l'ensemble des tentacules et relient le lophophore à d'autres secteurs de l'innervation.
    Notes: Summary The pathway of the tentacle nerves and the organisation of the peripharyngial nervous belt from which they arise, have been studied in Electra pilosa by silver stained whole mounts (Bielschowsky technique), and by ultrastructural investigation. Each tentacle is innervated by four nervous fascicles without any differentiated glial sheath, running between the epithelium and the collagen layer which surrounds the muscles and the peritoneal cells in the internal tentacle canal. Three nerves are gathered underneath the three rows of epithelial cells forming the oral edge of the tentacle. The fourth nerve is in medio-dorsal location. The oral epithelial cells show such ultrastructural adaptations in their general shape, in the density of their cytoplasm, in their ciliary apparatus reduced to a single cilium and in their close topographical and cytological relationship with the underlying tentacle nerves that it seems most probable they have a tactile function. The analysis of the pattern of the peripharyngial nervous belt shows a precise organisation and the intrication of the connections which coordinate the tentacles and link the lophophore set to other pathways of general innervation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306696
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  • 24
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    Electronic Resource
    Suppression of somatotrophs in growth hormone injected rats (1973)
    Springer
    Cell & tissue research 140 (1973), S. 309-314 
    Details
    ISSN: 1432-0878
    Keywords: Pituitary Gland ; Rat ; Somatotropin ; Cellular Response ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The response of somatotrophs to large doses of purified bovine growth hormone was examined in uninephrectomized rats drinking 1% sodium chloride in an attempt to prolong the action of the hormone. Growth hormone produced a triphasic response in the ultrastructure of somatotrophs. Uninephrectomy and salt alone induced no changes in somatotrophs as compared to unoperated animals consuming tap water. In the first phase (3 days) the cross sectional area of the cell increased, the size of the largest granule per cell as well as the number of granules per cell increased significantly. All these parameters then reached control level after 7 days of injections during a second phase. Suppression of somatotrophs by exogenous growth hormone was evident by 16 days (third phase) when the area of the cell, the size of the largest secretory granule as well as the number of granules per cell all decreased significantly. Somatotrophs apparently did not react to suppression by a lysosomal mechanism inasmuch as no increase in the number of lysosome-derived structures was seen even at 16 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307020
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  • 25
    Electronic Resource
    Electronic Resource
    Ultrastructural aspects of mouse cecal epithelium (1973)
    Springer
    Cell & tissue research 140 (1973), S. 445-449 
    Details
    ISSN: 1432-0878
    Keywords: Cecum, Colon ; Mouse ; Glycocalyx ; Intestinal microorganisms ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the cecal epithelium of the mouse resembles that of more distal parts of the colon. A brief discussion is presented of the possible significance of apical cytoplasmic granules to the glycocalyx and of the close association of microorganisms with the lining epithelium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306671
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  • 26
    Electronic Resource
    Electronic Resource
    Fine structure of the adenohypophysis in immature sockeye salmon, Oncorhynchus nerka (1973)
    Springer
    Cell & tissue research 140 (1973), S. 459-471 
    Details
    ISSN: 1432-0878
    Keywords: Adenohypophysis ; Sockeye salmon ; Cell types ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the secretory cells of the adenohypophysis of juvenile sockeye salmon was investigated. Pituitary glands were collected from immature fish transferred experimentally to sea water and subsequently returned to fresh water. The rostral pars distalis contained three cell types: ACTH cells, prolactin cells, and non-secretory cells. The prolactin and non-secretory cells were joined together in the form of follicles by desmosomes and they both had cilia and microvilli projecting into the follicle lumen. Various follicular structures such as lumen, multivesicular structures, and peripheral basement membrane are discussed as possible sites of prolactin cell granule release. The columnar ACTH cells were found at the junction of the rostral pars distalis and the neurohypophysis. The cytoplasmic granules in these cells were characteristically separated from their limiting membrane by a clear space. Multivesicular structures were also found in association with this cell type. The caudal pars distalis also contained three cell types: one acidophil (putative somatotrop) and two basophils (putative thyrotrops and gonadotrops), all of which were similar to those described in adult fish. The pars intermedia contained only one cell type. They appeared to be active cells and were characterized by containing membrane-bounded granules similar to those found in the ACTH cells. Changes in ambient salinity had no apparent effect on any cell type described.
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    URL: http://dx.doi.org/10.1007/BF00306673
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  • 27
    Electronic Resource
    Electronic Resource
    Fine structure of eyespots in tornarian larvae (Phylum: Hemichordata) (1973)
    Springer
    Cell & tissue research 142 (1973), S. 89-102 
    Details
    ISSN: 1432-0878
    Keywords: Photoreceptors ; Larva ; Hemichordate ; Ultrastructure ; Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The eyespots of tornariae of enteropneusts (Ptychodera flava from Hawaiian waters and an unknown species from southern California) were studied by electron microscopy. An ocellus is composed of two types of cells: sensory and supportive. The former is characterized by a bulbous cilium (with 9+2 axoneme) at its distal end, one or sometimes two arrays of microvilli from its sides below the cilium, and a basal axon. The latter features large, clear vesicles which presumably contained the reddish-orange pigment seen in the ocellus of a living larva. Five-day old tornariae of P. flava are positively phototactic. Both cilium and microvilli may function as photoreceptors. The tornarian ocellus studied is compared with eyespots of other invertebrates, and the evolutionary significance of its putative photoreceptors is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306706
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  • 28
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    Electronic Resource
    La spermiogenèse d'Albula vulpes (L. 1758) (Poisson Albulidae) (1973)
    Springer
    Cell & tissue research 142 (1973), S. 171-192 
    Details
    ISSN: 1432-0878
    Keywords: Spermiogenesis ; Teleost ; Albula vulpes ; Flagella ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé La jeune spermatide possède un noyau arrondi, un diplosome proche de la membrane cellulaire auquel sont associées des formations paracentriolaires; une mitochondrie unique est disposée entre le diplosome et le noyau. Au cours de l'évolution de la spermatide, le noyau s'allonge latéralement, son grand axe étant perpendiculaire à l'axe flagellaire; la mitochondrie migre à l'extrémité latérale du noyau; le centriole distal donne un flagelle de type 9+0; le centriole proximal se prolonge le long du noyau puis sort de la cellule sous la forme d'un pseudo-flagelle. Le prolongement centriolaire est constitué de triplets classiques et de doublets d'un type particulier que nous avons appelés «doublets A–C». Les auteurs signalent la similitude des spermatozoïdes de cet Elopiforme avec les spermatozoïdes d'Anguilliformes ce qui serait en faveur de la proposition de Greenwood et al. de rassembler ces téléostéens dans le super-ordre des Elopomorphes.
    Notes: Summary The early spermatid possesses a round nucleus and a diplosome which is close to the cellular membrane and with which paracentriolar formations are associated; a sole mitochondrion is located between the diplosome and the nucleus. During the spermatid evolution, the nucleus is laterally elongated, its main axis being perpendicular to the flagellar axis; the mitochondrion migrates towards the lateral end of the nucleus; the distal centriole is extended along the nucleus, then leaves the cell as a pseudoflagellum. This centriolar extension is made up of regular triplets and of a particular type of doublets that we have called “A–C doublets“. The authors call attention to the similarity between the spermatozoa of this Elopiforme and the spermatozoa of the Anguilliformes. This observation favours Greenwood et al.'s proposition, to place these teleost into the super-order of Elopomorpha.
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    URL: http://dx.doi.org/10.1007/BF00307031
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  • 29
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    Electronic Resource
    Feinstruktur der Luteinzellen des Meerschweincheneierstocks während der Schwangerschaft und des Zyklus (1973)
    Springer
    Cell & tissue research 142 (1973), S. 525-537 
    Details
    ISSN: 1432-0878
    Keywords: Lutein cells ; Guinea pig ; Sexual cycle ; Pregnancy ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die Feinstructur der Luteinzellen des Meerschweinchens während Schwangerschaft (15., 35., 45., 50., 55., 63. und 2 Tage nach der Geburt) und Zyklus (9, 14, 16, 20 Tage nach der Ovulation) wurden elektronenmikroskopisch untersucht. In den aktiven Luteinzellen kann man konzentrisch um die Lipoidtropfen angeordnete Strukturen des agranulären endoplasmatischen Retikulum beobachten, die später durch Membranstrukturen des granulären endoplasmatischen Retikulum ersetzt werden. Die Mitochondrien sind rund und enthalten tubuläre Innenstrukturen, die Lipoidtropfen sind elektronenoptisch dicht. Während der Rückbildung des Corpus luteum setzt sich das endoplasmatische Retikulum aus ungeordneten Vesikeln und Tubuli zusammen, die Mitochondrien sind länglich oder verzweigt, die Lipoidtropfen elektronenoptisch hell. Die Bedeutung dieser feinstrukturellen Veränderungen in der Luteinzelle wird diskutiert.
    Notes: Summary The fine structure of the lutein cells in guinea pigs corpora lutea of pregnancy (15th, 35th, 45th, 50th, 55th, 63th day and 2 days after birth) and during oestrous cycle (9, 14, 16, 20 days after ovulation) is described. During the active phase of the corpus luteum the formation of concentric whorls of agranular endoplasmic reticulum around lipid droplets is observed, but later the granular endoplasmic reticulum increases. In this stadium the mitochondria are round with tubulous cristae and the lipid droplets are increased in density. During the involution of the corpus luteum the endoplasmic reticulum does not form concentric whorls, the mitochondria are elongated, polymorphic, the lipid droplets have lower electron density. These ultrastructural changes in the lutein cells are discussed concerning the role of the cell organelles in the steroid synthesis.
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    URL: http://dx.doi.org/10.1007/BF00306713
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  • 30
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    Electronic Resource
    Licht- und elektronenmikroskopische Untersuchungen an den Leydigzellen des Schweines während der postnatalen Entwicklung (1973)
    Springer
    Cell & tissue research 143 (1973), S. 207-227 
    Details
    ISSN: 1432-0878
    Keywords: Testis interstitial cells ; Boar ; Postnatal development ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die postnatale Ontogenese der Hodenzwischenzellen des Schweins nimmt einen wellenförmigen Verlauf und läßt sich in 4 Phasen unterteilen. In der frühpostnatalen Proliferationsphase wandeln sich spindelförmige Zellen in polygonale Leydigzellen um. Dabei beginnt an einem Zellpol die Ausbildung des glatten endoplasmatischen Retikulums. Dieses Organell nimmt in der weiteren Entwicklung einen großen Teil des Zelleibes ein und bildet unregelmäßige Vesikel und konzentrisch geschichtete Zisternen. Es erfolgt eine Vermehrung der Mitochondrien, in ihnen entwickeln sich Tubuli. In der Phase der präpubertären Hypertrophie erreichen die Leydigzellen ihre größten Durchmesser (ca. 30 μm) und sind möglicherweise zu einer Steroidhormonproduktion befähigt. Da das glatte endoplasmatische Retikulum vornehmlich in der Zellperipherie, die übrigen Organellen bevorzugt im Zentrum liegen, sind die Zwischenzellen deutlich zoniert. Die Phase der präpubertären Regression ist durch ausgeprägte Zelldegeneration und Größenabnahme der überlebenden Zellen gekennzeichnet. In der Phase der pubertären Proliferation nehmen die Zwischenzellen erneut an Größe zu. Parallel hierzu vermehren sich Mitochondrien und glattes endoplasmatisches Retikulum. Beide Proliferationsphasen innerhalb der postnatalen Ontogenese werden durch das Auftreten zahlreicher Cytoplasmafilamente eingeleitet, deren Menge sich danach wieder verringert. Unabhängig von dem wellenförmigen Verlauf der Zwischenzellentwicklung ist die Ausbildung von Lysosomen, Microbodies, Mikrovilli, typischen Zellhaften und in der Zellperipherie gelegenen Polyribosomen. Die Leydigzellen sind von einer basalmembranähnlichen Struktur umgeben. Die Mitochondrien enthalten zu allen Zeiten durch elektronendichtes Material verkittete Tubuli.
    Notes: Summary The postnatal development of porcine testicular interstitial cells proceeds in a wave-like manner and may be divided into four periods. In the period of early postnatal proliferation fusiform intertubular cells change into polygonal Leydig cells. This process starts with formation of smooth endoplasmic reticulum in one of the cell poles. Later the smooth endoplasmic reticulum is abundant and consists of irregular vesicles and concentrically arranged cisterns. Mitochondria increase in number and develop tubular cristae. In the period of prepubertal hypertrophy Leydig cells reach maximal size (approx. 30 μm) and possibly may be capable of androgen biosynthesis. The cells of this period exhibit two different zones, since the smooth endoplasmic reticulum prefers the periphery, the other organelles, however, occupy the central region of the cells. The period of prepubertal regression is characterized by cellular degeneration and diminuation of the surviving interstitial cells. In the period of pubertal proliferation an increase of Leydig cell size is accompanied by multiplication of mitochondria and development of smooth endoplasmic reticulum. Both periods of proliferation are initiated by appearance of numerous cytoplasmic filaments which subsequently decrease in number. Interstitial cells of all periods studied exhibit the following features: They possess lysosomes, microbodies, polyribosomes, microvilli and are surrounded by a kind of basement membrane. Cell connections appear as tight junctions and desmosome-like structures. The mitochondria contain closely packed tubules joined by electron dense material.
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    URL: http://dx.doi.org/10.1007/BF00307479
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    An ultrastructural study of the synaptic densities, nematosomes, neurotubules, neurofilaments and of a further three-dimensional filamentous network as disclosed by the E-PTA staining procedure (1973)
    Springer
    Cell & tissue research 143 (1973), S. 239-272 
    Details
    ISSN: 1432-0878
    Keywords: Nervous tissue ; Specific structures ; Nematosomes ; Neurofilaments ; Neurotubules ; Three-dimensional filamentous network ; E-PTA Stain ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary After the staining of nervous tissue with phosphotungstic acid in absolute ethanol (E-PTA), a selective opacification occurs at certain specific sites, while other structures, especially the plasma and intra-cellular membranes, remain electron-lucent. Among those selectively stained sites, our studies have been focussed on: (1) The dense synaptic material consisting of several presynaptic clumps, termed projections, an intrasynaptic dense line and a subsynaptic web from which fine fibrillar wisps extend into the surrounding ground substance; (2) Neurofilaments and neurotubules, the surface of which is bristled by numerous side-arms; (3) A microfilamentous network intertwines the neurotubules, the neurofilaments and the mitochondria in the dendrites and axon, and is also connected to the E-PTA dense undercoating delineating the inner aspect of the plasma membrane and to the fine wisps emanating from the subsynaptic web. A three-dimensional microfilamentous latticework is thus formed in the nerve cell processes; (4) Dense cytoplasmic inclusions, termed nematosomes, which are usually located in the ground substance of the perikaryon among or in the vicinity of clusters of ribosomes. Tiny microfilaments emanate from the peripheral strands of these bodies. The presence of basic residues in the chains of structural proteins of which consist the subsynaptic web and the nematosome is plausible, since the specificity of the E-PTA staining procedure for the detection of basic residues has previously been put forth. The occurrence of a three-dimensional microfilamentous network in the nerve cell processes led us to hypothesize that it plays a role in translocation of materials. It may provide the motive force for the axoplasmic transport, for instance, with the neurotubules, as well as, plausibly, with the neurofilaments, serving as attachment sites and guideways.
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    URL: http://dx.doi.org/10.1007/BF00307481
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  • 32
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    Ultrastructural studies of oogenesis in some european amphibians (1973)
    Springer
    Cell & tissue research 143 (1973), S. 387-407 
    Details
    ISSN: 1432-0878
    Keywords: Oogenesis ; Urodela ; Yolk-formation ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Oogenesis was studied in adult Triturus vulgaris (Urodela) with the electron microscope. The oocytes investigated ranged between 50 μm and 1600 μm in diameter. Two types of yolk platelet formation were found. Since both types involve the incorporation of high numbers of pinocytotic vesicles they are believed to be of an extraoocytic origin. On the basis of the order of their appearance they were named primary and secondary yolk. Five different types of vesicles were found, which participate in a variety of activities, such as yolk formation and the formation of the Golgi apparatus. They originate from four different sources, namely the nuclear membrane, the cytoplasm in connection with ribosome-like particles, the Golgi apparatus and the plasma membrane through pinocytosis. The results obtained were discussed especially with respect to differences found between the anura and the urodela, such as the presence or absence of cortical granules or equivalent structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307423
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  • 33
    Electronic Resource
    Electronic Resource
    Electron microscopic study on the larval and adult corpus allatum of Oncopeltus fasciatus dallas (insecta, heteroptera) (1973)
    Springer
    Cell & tissue research 145 (1973), S. 447-458 
    Details
    ISSN: 1432-0878
    Keywords: Corpus allatum ; Oncopeltus fasciatus ; Larvae ; Imagines ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The ultrastructure of the corpora allata of last larval instars and adults of Oncopeltus was studied. The unpaired gland undergoes submicroscopic alterations and shows signs of degradation in old animals. The organ is partly covered and penetrated by corpus cardiacum tissue. Axons with different types of neurosecretory granules form synaptoid contacts with the corpus allatum cells. 2. “Dark” and “light” gland cells can be differentiated on account of the degree of electron density. The former predominate during the last larval stage and in the young imago, the latter in mature males and females. It is highly probable that the “light” cells are the active (i.e. hormone producing) ones and the “dark” cells the inactive ones. 3. The active cells are characterized by rough endoplasmatic reticulum (often in whorls), small amounts of smooth endoplasmatic reticulum and many multivesicular bodies. Abundant free ribosomes, a not particularly well developed Golgi apparatus, dense bodies, and cytolysomes are present in active and inactive cells. 4. The nuclei contain one to four prominent and variously shaped nucleoli, which show differences between adult males and females with respect to their location in the nucleus. 5. The corpus allatum cells of Oncopeltus are obviously engaged in extensive protein synthesis. Tangible structural indications for the manufacture of juvenile hormone were not observed. Possible sites of hormone release are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306717
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  • 34
    Electronic Resource
    Electronic Resource
    Electron microscopic study of the substantia nigra and the strio-nigral projection in the rat (1973)
    Springer
    Cell & tissue research 146 (1973), S. 207-221 
    Details
    ISSN: 1432-0878
    Keywords: Substantia nigra ; Rat ; Six bouton types ; Strio-nigral projection ; Bouton degeneration ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The normal ultrastructure of rat substantia nigra was investigated. Special attention was paid to the different types of boutons, and the mode of termination of the striatonigral connection was examined. Two different types of nigra neurons with deep nuclear membrane indentations were observed. The synaptic organization of rat substantia nigra is very complex. Six types of boutons, with many characteristics, could be differentiated: pleomorphicvesicle boutons (40%), elongated-vesicle boutons (10%), small-round-vesicle boutons (10%), large-round-vesicle boutons (20%), “clear-terminal” (15%) and dense-core-vesicle boutons (about 5%). Vesicle-containing dendrites were observed entering dendro-dendritic synapses. One to four days after large unilateral striatal lesions were made, a great number of degenerating boutons were seen in the ipsilateral substantia nigra, while the contra-lateral substantia nigra was entirely free of degeneration. The newly defined pleomorphic-vesicle boutons were found almost exclusively in the process of degeneration. The neuronal origin of the other bouton types is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307347
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  • 35
    Electronic Resource
    Electronic Resource
    Fine structure of capillaries in the pecten oculi of the sparrow, Passer domesticus (1973)
    Springer
    Cell & tissue research 146 (1973), S. 281-292 
    Details
    ISSN: 1432-0878
    Keywords: Eye ; Bird ; Pecten oculi ; Capillaries ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pecten oculi of the sparrow consists of capillaries, pigment cells and a superficial membrane. Because of the loose structure of the first two components broad intercellular spaces occur in the pecten. The capillary wall consists of endothelial cells and a perivascular membrane. The bodies of the endothelial cells are flattened, while the plasmalemma of both their surfaces (basal and luminal) is strongly folded and forms numerous microfolds with an average thickness of 700 Å. The height of the inner microfolds is 1.4–1.8 μm, the outer microfolds measure 1.3–1.6 μm. They lie densely packed side by side and are separated by recesses of the capillary lumen ca. 500 Å wide. Due to this the surface of the endothelial cell is increased by approximately 20-fold. The adjoining endothelial cells abut or overlap with margins, and are joined by the zonulae adherentes. Pigment cells form numerous processes and microvilli. Some rest on the capillary walls, while others penetrate the superficial membrane of the pecten or fill the intercellular spaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307352
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  • 36
    Electronic Resource
    Electronic Resource
    Axon retraction following guanethidine treatment (1973)
    Springer
    Cell & tissue research 146 (1973), S. 439-451 
    Details
    ISSN: 1432-0878
    Keywords: Sympathetic neurons ; Axon retraction ; Guanethidine ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Vasa deferentia of rats chronically treated with high doses of guanethidine sulphate (30 or 60 mg/Kg/day i.p.) were examined using electron microscopic, fluorescence histochemical and pharmacological techniques. Counts of the axon population in segments of the proximal (urethral) end of the vas deferens showed a reduction to approximately 55% and 35% in the number of axon profiles after treatment for one week with the two dose levels respectively. In the same period only a few cell bodies in the hypogastric ganglion (from which most of the adrenergic innervation of the vas deferens arises) reached the stage of terminal degeneration. Although many axons showed some abnormalities, the number of axons observed in terminal stages of degeneration in treated tissue did not exceed, at any stage examined, the very small numbers observed in control tissue. Organ bath studies showed that the contractile response to transmural stimulation was lost fastest at the distal (epididymal) end of the treated vas deferens. These results have led to the conclusion that, in contrast to the degeneration of adrenergic axons produced by surgery or 6-hydroxydopamine, the sympathectomy produced by guanethidinein vivo involves theretraction of adrenergic axons prior to complete degeneration of the cell bodies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02347174
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  • 37
    Electronic Resource
    Electronic Resource
    Ultrastructure of nerve terminals and muscle fibers in denervated crayfish muscle (1973)
    Springer
    Cell & tissue research 146 (1973), S. 155-165 
    Details
    ISSN: 1432-0878
    Keywords: Muscle ; Crayfish ; Synapse ; Degeneration ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Neuromuscular junctions, muscle fibers, and intramuscular nerve branches in crayfish opener muscles denervated for periods up to 368 days were examined with the electron microscope. The majority of the denervated muscles responded to stimulation of the isolated distal part of the motor axon with electrical activity and contractions. The neuromuscular junctions and muscle fibers appeared normal in such preparations: synapses and synaptic vesicles were present in the nerve terminals, and the organization of filaments and tubules in the muscle fibers was not distinguishable from that in normal muscles. In some preparations denervated for a long time, and in others denervated by tying the motor axon close to the muscle, the motor axons showed physiological and morphological evidence of degeneration. Synapses, when present in such preparations, showed few synaptic vesicles, which were often clumped. Muscle fibers showed signs of degeneration. These observations suggest that isolated distal motor axon segments can remain alive for at least a year, retaining normal structure. As long as the motor axon is viable, the muscle remains normal in appearance, but if the axon degenerates, the muscle becomes abnormal. A trophic interdependence between nerve and muscle is probably involved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307344
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  • 38
    Electronic Resource
    Electronic Resource
    Zum neuen Jahrgang (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 1-1 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040102
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  • 39
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    Electronic Resource
    Kraft- und Wegmessungen als Grundlage für das Verständnis des Kerbschlagbiegeversuchs (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 4-12 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Load-Displacement Diagrams - a Basis for the Understanding of Notched Bar-Impact Tests. The absorbed energy as well as the effect of temperature on absorbed energy during the recording of load - displacement diagrams of notched bar - impact tests of mild steels, Ck 10, Ck 35, Ck 45, Ck 60 and C 85W 2 in normalized state were analysed. The considerable values of relation between discontinuity in nature of characteristic load and displacement of load displacement diagrams and irregularity of fracture toughness temperature curves were obtained there.From these investigations one can define characteristic temperatures (transition temperatures), which are not arbitrary, but physically founded and which describe the behaviour of materials in different temperature-ranges. These characteristic temperatures, above all, the crack arrest temperature could also be defined after fractographical and microfractographical investigations.The absorbed energy temperature curves were also determined arithmetically with the application of simple methode of area computation of load displacement diagrams. Therefore, it can be made sure that the available curves are correct and determined on principle of physics.
    Notes: Ausgehend von der Messung des Kraft- und Wegverlaufs beim Kerbschlagbiegeversuch wird die Kerbschlagzähigkeit und der Verlauf der Kerbschlagzähigkeits-Temperatur-Kurve für die Werkstoffe Sonderweicheisen, Ck 10, Ck 35, Ck 45, Ck 60 und C 85 W 2 im normalgeglühten Zustand-analysiert. Dabei ergeben sich beachtenswerte Zusammenhänge zwischen den Unstetigkeiten im Verlauf der charakteristischen Kräfte und Wege der Kraft-Weg-Diagramme und den Unregelmäßigkeiten des Verlaufs der Kerbschlagzähigkeit in Abhängigkeit von der Temperatur.Davon ausgehend können auch charakteristische Temperaturen definiert werden, die nicht willkürlich, sondern physikalisch begründet sind, und die das Werkstoffverhalten in verschiedenen Temperaturbereichen beschreiben. Besondere Bedeutung scheint der Rißauffangtemperatur zuzukommen. Der Verlauf der Kerbschlagzähigkeits-Temperaturkurven wurde auch auf Grund einer einfachen Modellvorstellung des Kraft-Weg-Diagramms aus Kraft und Weg rechnerisch bestätigt. Der ermittelte Verlauf kann damit grundsätzlich als physikalisch gesichert betrachtet werden.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040104
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  • 40
    Electronic Resource
    Electronic Resource
    Kurze Informationen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 50-58 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040110
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  • 41
    Electronic Resource
    Electronic Resource
    Masthead (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973) 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040201
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  • 42
    Electronic Resource
    Electronic Resource
    Schützende Oberflächen für metallische Werkstoffe (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 60-66 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Coatings for Metallic Materials. The most important coating techniques are characterized and critically described. Among the various possibilities to protect the surface of metallic materials against mechanical, chemical or mechanical-chemical attack, the coatings which are looked upon are ranging from metallic coatings over nonmetallic anorganic to the organic ones.
    Notes: Von den zahlreichen Möglichkeiten, die Oberfläche metallischer Werkstoffe widerstandsfähig gegen mechanische, chemische oder mechanisch-chemische Angriffe zu gestalten, werden die wichtigsten kurz in ihren Einsatzgebieten geschildert und kritisch beurteilt. Der Rahmen der vorgestellten Beschichtungen reicht von den metallischen Deckschichten über nichtmetallische anorganische Schichten bis zu den organischen Belägen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040203
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  • 43
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    Electronic Resource
    Über den Einfluß unterschiedlicher Abscheidungsbedingungen auf einige mechanische Eigenschaften von Nickelschichten aus dem Sulfamatbad (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 66-71 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Conditions of nickel-plating from a sulfamate electrolyte and mechanical properties of the deposit. Nickel deposits are used for decorative and technical application. In this paper the influence of plating conditions on internal stress, hardness, fatigue and corrosion resistance of nickel deposit is dicussed.
    Notes: An Hand einiger Beispiele wird der quantitative bzw. qualitative Zusammenhang zwischen dem durch definierte Abscheidungsbedingungen in Nickelschichten aus dem Sulfamatbad einstellbaren Eigenspannungszustand 1. Art und daraus resultierenden mechanischen und chemischen Eigenschaften gezeigt. Das bekannte Spiralkontraktometerverfahren zur Messung solcher Eigenspannungen wird besonders im Hinblick auf die Auswertungsmethode verbessert bzw. korrigiert, wodurch nunmehr der tatsächliche Verlauf der Eigenspannungen über der Schichtdicke in Abhängigkeit von der gewählten kathodischen Stromdichte festgestellt werden kann. Die Untersuchungen haben gezeigt, daß bei dem hier benutzten Nickelelektrolyten die Eigenspannungen und die hiermit zusammenhängenden Größen nicht nur von den Galvanisierbedingungen bestimmt werden, sondern auch - und dies steht im Gegensatz zu den bisherigen Publikationen - von der Schichtdicke.Für die Praxis ergeben sich daraus folgende Konsequenzen:Anwendung möglichst niedriger Stromdichten in allen Fällen hoher Betriebsbeanspruchung der galvanisierten Bauteile, sei es mechanischer oder chemischer oder auch kombinierter mechanisch-chemischer Art; ist aus Gründen höherer Wirtschaftlichkeit eine größere Abscheidungsgeschwindigkeit erwünscht, so sollte die Schichtdicke auf möglichst niedrigen Werten gehalten werden; in solchen Fällen ist jedoch darauf zu achten, daß bei möglichem Korrosionsangriff eine Mindestschichtdicke vorgesehen werden muß, die den zu schützenden Grundwerkstoff vollkommen (porenfrei) vom angreifenden Agenz trennt.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040204
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  • 44
    Electronic Resource
    Electronic Resource
    Entwicklungstendenzen auf dem Gebiet der organischen Beschichtungen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 86-93 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Development trends in the field of organic coatings. Modern materials for organic coatings are supposed to permit economic processing and should be unobjectionable in environmental terms. These requirements can only incompletely be satisfied by modification of conventional products. Thus the aspects are good for water-soluble binders as well as for solvent-less materials curing by chemical reaction only. However, developments in the processing field are becoming even more important than those of materials. Electrostatic spraying procedures and dipping techniques with trichlorethylene as solvent demonstrate the progress made in generally approved methods. The use of powder as coating material, the method of film-curing by electron beams, and the electro-coating process, however, are novel procedures based on appropriate physical effects.
    Notes: Ein zeitgemäßer organischer Beschichtungsstoff soll sich wirtschaftlich verarbeiten lassen und umweltfreundlich sein. Durch Modifizierung konventioneller Produkte sind die Forderungen nur begrenzt zu erfüllen. Deshalb bestehen für wasserlösliche oder reaktionshärtende lösungsmittelfreie Bindemittel gute Zukunftsaussichten. Mehr noch als die Entwicklungen auf stofflichem Gebiet gewinnen jene der Verfahrenstechnik an Bedeutung. Elektrostatisches Spritzen und Tri-Tauchverfahren stellen Weiterentwicklungen bewährter Methoden dar. Beschichten mit Pulver, Härten mit Elektronenstrahlen und Elektrotauchlackieren sind dagegen neuartige, auf geeigneten physikalischen Vorgängen beruhende Verfahren zur Erzeugung organischer Überzüge. Auch in die Halbzeugfertigung wird das Beschichten zunehmend einbezogen, wie das Coil-Coating- oder das Shop-Primer-Verfahren zeigen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040208
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  • 45
    Electronic Resource
    Electronic Resource
    Entwicklungen auf dem Gebiet des Laserschweißens (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 103-110 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Some Developments in Laser Beam Welding. The development of continuous high power lasers leads to new possibilities in welding thicker sheet. This has been proved by joining metals with YAG- and CO2-laser beams. Technical limits of several laser-systems are critically discussed and some examples are given for the application of the high intensity beams.
    Notes: Durch die Entwicklung von kontinuierlich arbeitenden Hochleistungslasern wird es möglich, die Laserstrahlung zum Fügen von Blechen größerer Dicke einzusetzen. Erste Ergebnisse über das Schweißen mit einem YAG- sowie einem CO2-Laser liegen vor. In einer kritischen Beurteilung werden die Verfahrensgrenzen einzelner Lasersysteme aufgezeigt und einige Anwendungen diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040213
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  • 46
    Electronic Resource
    Electronic Resource
    K. Winnacker und L. Küchler, Chem. Technologie Bd. 3. Organische Technologie 1. 3. Auflage 1971, Carl Hanser Verlag, München, 666 Seiten mit 260 Bildern und 193 Tabellen, Preis DM 110,  -  (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 110-110 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040214
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  • 47
    Electronic Resource
    Electronic Resource
    Höger: Warmformen von Kunststoffen; 200 Seiten mit 113 Abbildungen, Carl Hanser Verlag 1971, Preis DM 28, - (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 111-111 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040218
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  • 48
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    Electronic Resource
    Max Bremberger: Elektro-Mechanik, Carl Hanser Verlag München, 1970, 312 Seiten mit 210 Bildern, 47 Tabellen und einem Waren-und Herstellerverzeichnis, Format 24,5 cm × 17 cm, Leinen, DM 52, - (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 112-112 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040220
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  • 49
    Electronic Resource
    Electronic Resource
    Werkstoffe und Elektrotechnik (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 113-113 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040302
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  • 50
    Electronic Resource
    Electronic Resource
    Betrachtungen zur Werkstoffauswahl und Werkstoffnutzung (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 203-209 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Considerations on Materials Selection and Utilization. Screw joint - an example for applied materials science.
    Notes: Die Schraube als Beispiel für angewandte Werkstoffkunde
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040406
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  • 51
    Electronic Resource
    Electronic Resource
    Sigma phase in 321 stainless steel (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 199-203 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Nachweis und Bildung der Sigma-Phase in Stahl 321. Der Bruch eines Flansches aus dem rost- und säurebeständigen Stahl 321 (≙ 1.4541 × 10 CrNiTi 18 9) war Anlaß, die Wirksamkeit eines Ätzmittels für den Nachweis der Sigma-Phase in diesem Stahl zu überprüfen. Gleichzeitig wurde ein Zeit-Temperatur-Diagramm für die Ausbildung der Sigma-Phase in diesem Werkstoff aufgestellt.
    Notes: The failure of a 321 stainless steel flange due to the presence of sigma phase was used to check etching procedures for sigma phase in 321 SS as well as to establish the time-temperature diagram for sigma phase in this material.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040405
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  • 52
    Electronic Resource
    Electronic Resource
    Masthead (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973) 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040501
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    Taschenbuch der Stahl-Eisen-Werkstoffblätter. Herausgegeben vom Verein Deutscher Eisenhüttenleute 1971. Format DIN A5. IV/219 Seiten. Verlag Stahleisen mbH., Düsseldorf, DM 25, -  (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 228-228 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040413
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  • 54
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    Beeinflussung des Dauerschwingverhaltens gekerbter Proben durch unterschiedlichen Verschleißzustand der zur Kerbherstellung verwendeten WerkzeugeAuszug aus der vom Fachbereich 17, „Werkstoffwissenschaften“, der TU Berlin genehmigten gleichnamigen Dissertation von Dipl.-Ing. W. Nickel (Berichter: Prof. Dr.-Ing. E. Rossow, Prof. Dr.-Ing. W. Beitz. Mündl. Prüfg. 10. 4. 72). (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 416-421 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence on the fatigue behavior of notched specimens by different wear and tear of the tools used for producing the notches. In fatigue-specimens of × 5 CrNi 18 9 and Ck 45 notches had been produced by sharp and blunt tools. The fatigue strength of this specimens from austenitic steeel was smaller when the notches had been produced by sharp and blunt tools. The fatigue strength of this specimens from austenitic steeel was smaller when the notches had been produced by sharp tools. Specimens of ferritic steel on the contrary had a greater fatigue strength, when the notches had been produced by blunt tools. Statistical methods had been used for planning and evaluation of the tests. Therefore appear differences in the strength reduction factor ßk between in conventional manner determined statements and the here calculated ones.
    Notes: An Dauerschwingproben aus X 5 CrNi 18 9 und Cl 45 wurden Kerben mit scharfen und stumpfen Werkzeugen hergestellt. Die Dauerschwingfestigkeit der Proben war bei mit stumpfem Werkzeug hergestelltem Kerb beim austenitischen Stahl kleiner, beim ferritischen größer als bei mit scharfem Werkzeug hergestelltem Kerb.Alle Versuche wurden nach statistischen Verfahren angesetzt-und ausgewertet. Dadurch ergeben sich bei Vergleichen des Kerbwirkungsfaktors ßk mit auf konventionellem Wege ermittelten Werten von ßk Abweichungen.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040804
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    Surface Mechanics. Von F. F. Ling. 1. Auflage, John Wiley & Sons, Chichester Sussex, Baffins Lane/England. 1973, 320 Seiten, 159 Bilder, 15 Tabellen, 16 × 23,6 cm, geb. L 10.00 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 454-455 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040813
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  • 56
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    Kunststoff-Galvanisierung, Handbuch für Theorie und Praxis. Redigiert von Professor Dr.-Ing. Robert Weiner. Eugen G. Leuze Verlag, Saulgau. 1973, 276 Seiten, 276 Abbildungen und mehrere Tabellen, Größe 17 × 24 cm. Kunstdruckpapier, Leineneinband mit mehrfarbigem Schutzumschlag. 86-DM +5,5% MWSt (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 455-455 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040817
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  • 57
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    Oberflächenschutzschichten für metallische Hochtemperatur-Werkstoffe. Teil 2: Schutzschichten auf Superlegierungen und hochschmelzenden Metallen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 427-433 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Protection of High Temperature Metallic Materials against Oxidation, part 2; Protective Layers on Superalloys and High Temperature Materials. The structures of typical protective coatings of superalloys and Nb-alloys are briefly described and possible reasons for their failure are given. The importance of self-healing properties and of the reliability of such protective layers in any technical application is stressed. An order of magnitude of the duration of protection for different alloys is indicated for several coating types.
    Notes: Im ersten Teil dieses AufsatzesTeil 1 erschienen in Zeitschrift für Werkstofftechnik 4 (1973) S. 345-350. wurde auf Entwicklungstendenzen, Prüfung und Herstellung von Schutzschichten hingewiesen. Nachfolgend werden Beispiele für Schutzschichten, die für Superlegierungen und hochschmelzende Metalle entwickelt wurden, beschrieben. Die Superlegierungen repräsentieren den heutigen technischen Stand der Entwicklung. Die hochschmelzenden Metalle müssen für zukünftige Entwicklungen herangezogen werden. Im folgenden Text wurde das aussichtsreichste hochschmelzende Metall Niobium besonders berücksichtigt. Das Schutzschichtproblem existiert in ähnlicher Weise für die Metalle Mo, W, Ta und auch Cr. Es wurden bei diesen Metallen analoge Schichttypen wie hier beschrieben angewandt, die auch in ihrer Problematik starke Parallellen aufweisen.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040806
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  • 58
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    Verschleißfeste Werkstoffe. VDI-Berichte Nr. 194, Vorträge der VDI-Tagung Stuttgart, 1973. VDI-Verlag, Düsseldorf, 1973. 242 Seiten, 317 Bilder, 46 Tabellen. DIN A 4, kart. DM 103,- (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 454-454 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040812
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  • 59
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    Die Bedeutung der Werkstoffauswahl für die Gebrauchstauglichkeit von Chemieapparaten Auswahlkriterien und Prüfverfahren (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 169-186 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Materials selection and service properties of chemical plants - criteria of selection and testing methods. Materials selection and technical design - operating temperature and limit of stress - corrosion and abrasion resistance - corrosion testing methods - testing of corrosion behavior of welded joints.
    Notes: Werkstoffauswahl und konstruktive Planung - Betriebstemperatur und mechanische Beanspruchbarkeit - Verarbeitbarkeit - Beständigkeit gegenüber Korrosion und Verschleiß - Korrosionsprüfverfahren - Prüfung des Korrosionsverhaltens von Schweißverbindungen.
    Additional Material: 31 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040402
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    Einsatzmöglichkeiten des Chemical-Vapour-Deposition-Verfahrens bei der Entwicklung von Verbundwerkstoffen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 215-221 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Potential Application of the Chemical Vapour Deposition Process to the Development of Composites. A description of the chemical vapour deposition (CVD) process and its potential applications to the development of new materials, specifically composites, is presented. Particular importance is attached to the coating of powders (particle composites), the production of fibres and their coating with adhesive and wetting agents and with diffusion and reaction barriers (fibre composites), and the deposition of corrosion-inhibiting, heat-insulating and wearresistant surface layers (laminated composites).
    Notes: Behandelt werden das Chemical-Vapour-Deposition (CVD)-Verfahren sowie dessen Einsatzmöglichkeiten auf dem Sektor der Werkstoffentwicklung, speziell der Verbundwerkstoffentwicklung. Dabei liegen die Schwerpunkte der Betrachtung auf der Pulverbeschichtung für die Herstellung von Partikelverbundwerkstoffen sowie der Faserherstellung und -beschichtung mit Haft- und Benetzungsvermittlern bzw. Reaktions- und Diffusionsbarrieren bei Faserverbundwerkstoffen. Diskutiert werden ferner im Zusammenhang mit den Schichtverbundwerkstoffen die Probleme und Möglichkeiten der Aufbringung von Oberflächenschichten aus korrosionshemmenden, wärmedämmenden bzw. verschleißfesten Materialien.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040408
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    Einfluß der Hartstoffkomponenten auf einige Eigenschaften von Hartmetallen unter besonderer Berücksichtigung neuerer WerkstoffentwicklungenAuszugsweise vorgetragen am 8. Mai 1972 anläßlich des 7. werkstoffwissenschaftlichen Seminars in Stuttgart (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 209-214 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of the Hard-material-components on some Properties of Hardmetals Respecting Especially Modern Developments of Working Materials. In the following paper some properties of hardconcerning the application are discussed.First of all the function of tungsten-carbide, of titanium-carbide and of tantalum-carbide in the conventional hardmetals are described, also pointing out the possibilities of linear-analytical structure-examination in connection with tool-life-testsAlso the field of special working-materials with carbide phase used nowaday in the market besides conventional carbide-base hardmetals is reported briefly.
    Notes: In den folgenden Ausführungen werden einige die Anwendungstechnik interessierende Eigenschaften von Hartmetallen diskutiert. Zunächst wird bei den konventionellen Hartmetallen die Wirkungsweise von Wolframkarbid, Titankarbid und Tantalkarbid beschrieben, wobei auf die Möglichkeiten der linearanalytischen Strukturuntersuchung in Verbindung mit Standzeitversuchen hingewiesen wird. Das Gebiet der heute neben den konventionellen Hartmetallen marktgängigen Sonderwerkstoffe mit karbidischer Hartstoffphase wird knapp beleuchtet. Besonders werden die neueren Werkstoffentwicklungen auf dem Gebiet der Verbundschneidstoffe berücksichtigt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040407
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    Elektronenstrahl-Mikroanalyse (ESMA) zur Untersuchung basischer feuerfester Stoffe von K.H. Obst, W. Münchberg und H. Malissa. Springer-Verlag Wien-New York 1972.125 Seiten, 73 Abbildungen, 16 Tabellen, Preis DM 65,  -  (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 228-228 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040412
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  • 63
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    Einsatz der Atom-Absorptions-Spektroskopie in der industriellen Analytik (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 285-292 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Application of Atomic Absorption Spectroscopy in Industrial Analysis. Atomic Absorption Spectroscopy is highly useful for the determination of metallic elements in all fields of industrial analysis, due to its high specifity and selectivity, its few interferences, and its high flexibility. Design and function of an Atomic Absorption Spectrophotometer are described, and the different possible interferences are discussed as well as the possibilities for overcoming them. Advantages and disadvantages of the flame as a means of atomisation are mentioned, and the application possibilities of the flameless atomisation, especially in the graphite furnace, are discussed. Examples for the application of AA are given from the fields of metallurgy, oil analysis, chemistry of polymers, and of water analysis.
    Notes: Die Atom-Absorptions-Spektroskopie eignet sich aufgrund ihrer hohen Spezifität und Selektivität, ihrer geringen Störanfälligkeit und ihrer großen Flexibilität in hohem Maße für die Bestimmung metallischer Elemente auf allen Gebieten der industriellen Analytik. Aufbau und Funktion eines Atom-Absorptions-Spektrophotometers werden beschrieben und die verschiedenen Störmöglichkeiten ebenso wie deren Beseitigung diskutiert. Vor- und Nachteile der Flamme als Atomisierungsmittel werden besprochen und die Einsatzmöglichkeiten der flammlosen Atomisierung speziell in der Graphitrohrküvette diskutiert. Anwendungsbeispiele aus der Metallurgie, der Ölanalyse, der Polymerchemie sowie der Wasseranalytik u. a. werden gegeben.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040602
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    Berechnung des numerischen Einflusses von Zerlegeschrittweite und Auswertegleichung auf die Bestimmungsgenauigkeit von experimentellrechnerischen Eigenspannungsermittlungen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 315-322 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Calculation of the numerical influence of dividing step depth and evaluation equation on the determination accuracy from experimentally - calculated residual stresses. Residual stress determinations are often used for the estimation of mechanical and corrosion behavior of materials. Interesting is, depending on the material property to be estimated, the sign, the distribution or the absolute value of the existing residual stresses. Hence, the question about the accuracy of any residual stress determination in many cases is of great importance. The present investigation relates itself to the influence of errors from experimentally - calculated residual stresses by dividing method. For this generally used determination method will give a possibility for calculating the error resulting from numerical evaluation of investigation results, here shown with the example of a beam. Apart from the well known Stäblein-Equation [2] two finite determination equations, derived during the work, are investigated by varying the depth of dividing step.
    Notes: Eigenspannungsbestimmungen werden häufig zur Beurteilung des mechanischen und korrosiven Werkstoffverhaltens herangezogen. Von Interesse sind, je nach der zu beurteilenden Werkstoffeigenschaft, das Vorzeichen, die Verteilung oder die absolute Größe der vorhandenen Eigenspannungen. Daher ist die Frage nach der Genauigkeit der jeweiligen Eigenspannungsermittlung in vielen Fällen von großer Bedeutung. Die vorliegende Untersuchung beschäftigt sich mit den Fehlereinflüssen bei der experimentell-rechnerischen Ermittlung von Eigenspannungen nach der Zerlegemethode. Für dieses am meisten angewendete Bestimmungsverfahren wird eine Möglichkeit zur Berechnung der durch die numerische Auswertung von Versuchsergebnissen entstehenden Fehler am Beispiel des Balkens aufgezeigt. Außer der bekannten Auswertegleichung von Stäblein [2] werden zwei in der Arbeit abgeleitete finite Bestimmungsgleichungen bei veränderlicher Zerlegeschrittweite untersucht.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040607
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    Baustähle der Welt. Band III: Sonderstähle. Autorenkollektiv; H. Kulke, G. Rullmann, K. Werner; 410 Seiten, 77 Bilder, 261 Tabellen; VEB Deutscher Verlag für Grundstoffindustrie, Leipzig 1972, Preis DM 42,- (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 343-344 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040613
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    L. Föppl und E. Münch: Praktische Spannungsoptik. Springer-Verlag, Berlin 1972. 3. Auflage, 300 Seiten, 198 Abbildungen. Preis DM 58,- (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 344-344 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040617
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    Oberflächenschutzschichten für metallische Hochtemperatur-WerkstoffeVortrag VDM, Hauptversammlung in Lausanne 1971. Teil 1: Entwicklungstendenzen, Prüfung und Herstellung von Schutzschichten (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 345-350 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Protection of High Temperature Metallic Materials against Oxidation. Part 1: Development Trends, Testing and Preparation of Protective Layers. A comparison is given of the chemical compositions of industrial Co- and Ni- high-temperature alloys used in the past years. Due to their relatively low Cr and Al contents the more recent super-alloys require additional oxidation protection. Theoretically, the refractory metals would allow much higher working temperatures than the super-alloys, but alloys based on such metals need a much more perfect oxidation protection. The fabrication testing and methods for such protective layers are briefly reviewed.The second part of this paper will describe some specific protective layers for super-alloys and refractory metals.
    Notes: Ein Vergleich der chemischen Zusammensetzungen der in den letzten Jahren industriell verwendeten Hochtemperaturlegierungen auf Co- und Ni-Basis wird gegeben. Infolge der relativ geringen Al- und Cr-Gehalte der heute verwendeten Legierungen benötigen diese einen zusätzlichen Oxydationsschutz. Die theoretischen Einsatztemperaturen von hochschmelzenden Metallen liegen wesentlich über den heute üblichen Werten der Superlegierungen. Diese Legierungen bedürfen jedoch eines schr hochwertigen Oxydationsschutzes. Ein kurzer Überblick über die Verfahren zur Prüfung und Herstellung entsprechender Schutzschichten wird gegeben.Im zweiten Teil dieses Aufsatzes werden spezielle Schutzschichten auf Superlegierungen und hochschmelzenden Metallen behandelt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040702
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    Die wechselseitige Umrechnung von Vickers-und Knoop-Härtewerten im Kleinlastbereich (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 386-389 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Interconversion of Vickers and Knoop hardness numbers obtained in low load testing. In the industrial field the Vickers indenter has been largely applicated for hardness testing at low loads; in recent times the Knoop indenter came into use more and more. Consequently the question was raised, whether on the basis of some fundamental assumptions and experimental results equations could be deduced for interconversion of hardness numbers on Vickers and Knoop scales.Subsequently, a set of equations representing the connection between these above mentioned scales is given. The parameters of these equations were computed applying methods of statistical estimation.
    Notes: Kleinlasthärteprüfungen werden im industriellen Bereich überwiegend nach dem Vickers-Verfahren, in jüngerer Zeit jedoch auch zunehmend nach dem Knoop-Verfahren durchgeführt. Damit erhebt sich die Frage nach einer wechselseitigen Umwertbarkeit der mit unterschiedlichen Eindringkörpern ermittelten Härtewerte.Aus einem umfangreichen Vergleichsversuch wurden Umrechnungsbeziehungen abgeleitet und in einfacher Form dargestellt. Empfehlungen für die Ergebnisabsicherung bei der Anwendung dieser Beziehungen wurden ausgesprochen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040708
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    Firmennachrichten (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 398-399 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040711
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    Mechanics of fracture 1. Methods of analysis and solutions of crack problems. Herausgegeben von G. C. sih, Professor of Mechanics and Director of the Institute of Fracture and Solid Mechanics, Lehigh University, Bethlehem, Pennsylvania (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 400-400 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040714
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    Applied Mineralogy/Technische Mineralogie. Edited by/Herausgegeben von V. D. Fréchette, Alfred, N. Y., H. Kirsch, Essen, L. B. Sand, Worcester, mass., f. Trojer, Leoben. Vol. 3: Arc Plasma Technology in Materials Science. By Dennis A. Gerdeman, B. M. E., M. S., Research Scientist, University of Dayton Research Institute, Dayton, Ohio, U.S.A., and Norman L. Hebt, B. S., M. S., Ph. D., Research Ceramist, Univ. o. D. r. Inst., D. Ohio, USA. With 73 Figure, X,206 pages. 1972. Cloth S 518,-, DM 75,-, US$ 23,80 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 455-455 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040814
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  • 72
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    Korrosionsprobleme in heiztechnischen Anlagen. Von Dr.-Ing. Heinz Reinders, 3, neubear. u. erweitere Auflage. VDI-Verlag GmbH, Düsseldorf. 1+73, 67 Seiten, 36 Bilder, 4 Tabellen, DIN A 5, kart. DM 16,80 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 455-455 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040815
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  • 73
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    Oberflächentechnik - wozu?? (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 59-59 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040202
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  • 74
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    Werkstoffeigenschaften eines neuen, warmverformbaren ledeburitischen Stahles mit 12% Chrom und 3% Kohlenstoff (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 41-49 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Properties of a new wrought eutectic steel with 12% Cr and 3% C During the development of the metallurgical features of the ESR-process, it has been established that it was possible to remelt eutectic high chromium steels with a carbon content of up to 3,3% with the object to obtain ingots that can be forged or rolled into plates. A new steel grade, X 290 Cr 12, Material No. 1.2086, is introduced and its use for the manufacture of coldwork tools and wear-resisting components (maintenance of cutting edge, resistance of friction and abrasion) recommended.
    Notes: Es wird über die Werkstoffeigenschaften neu entwickelter, warmverformbarer ledeburitischer Stähle mit 12% Cr und 2,5…3,5% Kohlenstoff berichtet, wobei im besonderen der Stahl X 290 Cr 12, Werkstoff Nr. 20861, vorgestellt wird. Der große Karbidanteil dieses Stahles von 30 Vol. %, die hohe erreichbare Härte von 66… 70 HRC sowie die ausgezeichneten Verschleißkennwerte bei abrasivem Verschleiß und Schneidenverschleiß lassen diesen Stahl trotz der im Vergleich zu herkömmlichen ledeburitischen Chromstählen etwas verminderten Zähigkeit für den Einsatz als Werkzeugstahl bei hohen Verschleißbeanspruchungen aussichtsreich erscheinen. Obwohl die Warmfestigkeit geringfügig höher ist, läßt sich der Stahl X 290 Cr 12 einwandfrei mechanisch bearbeiten. Das Maßänderungsverhalten beim Härten ist mit dem herkömmlicher ledeburitischer Cr-Stähle vergleichbar. Erste Erprobungen des Stahles X 290 Cr 12 für Formplatten zum Verpressen keramischer Materialien, für Kaltwalzen mit besonders hoher Oberflächenhärte, aber auch für Schneidwerkzeuge zum Stanzen dünner Bleche [26], haben die erwarteten guten Standzeiten erbracht.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040109
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  • 75
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    Oberflächenbeschichtung durch thermisches Spritzen (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 76-81 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Thermal spraying. Thermal spraying in comparison with other coating techniques is characterized by a broad variability of base and spraying materials. After a brief description of actually used equipments some coating properties are summarized. Thermally sprayed special metal will become interesting in near future from commercial and technical point of view. With those metals homogeneous coatings can be produced without porosity.
    Notes: Das thermische Spritzen zeichnet sich gegenüber anderen Verfahren zur Oberflächenbeschichtung durch die Vielfältigkeit der verwendbaren Grund- und Spritzwerkstoffe aus. Neben einer Beschreibung gegenwärtig eingesetzter Geräte wird kurz auf den Schichtaufbau eingegangen. Wirtschaftlich und technisch von besonderem Interesse werden in naher Zukunft thermisch gespritzte Schichten aus Sondermetallen sein, die sich unter Schutzgas porenfrei und homogen erzeugen lassen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040206
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  • 76
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    Betrachtungen zur Werkstoffauswahl und Werkstoffnutzung (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 93-96 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Considerations on Materials Selection and Utilization. Criteria for correct and economic materials selection are discussed, safety and durability are defined.
    Notes: Kriterien für eine richtige Werkstoffauswahl werden genannt und diskutiert, die Begriffe Sicherheit und Lebensdauer werden behandelt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040209
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  • 77
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    Personalia (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 102-102 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040212
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  • 78
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    H. Röber, H. Vohwinkel: Kunststoffe im Apparatebau 1, Kleben, Trennen, Schweißen, Fügen von PVC und Polyolefinen. Carl Hanser Verlag, München, 1972, 140 s., 86 Abb., 14 Tafeln, Format 14,5 × 21 cm, Alkorphaneinband, Preis DM 26, - (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 110-110 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040215
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  • 79
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    H. Budzikiewicz: Massenspektrometrie. Eine Einführung. Taschentext Band 5. Verlag Chemie, Physik Verlag weinheim/Bergstraße 1972, 162 Seiten, 59 Abbildungen, 13 Tabellen, Preis DM 14,80 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 111-111 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040217
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  • 80
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    Eigenspannungen in der Oberfläche gas- und badnitrierter Stahlproben (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 81-85 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Residual stresses in the surface of gas and bath nitrided steel specimens. Residual stresses in the steels Ck 45, 34 Cr 4, 34 CrAl 6, and Ck 15 were measured by X-ray diffraction. Cylindrical specimens of the heat-treated steels were nitrided in ammonia-gas and in a Tenifer®-salt- bath. The course of residual stresses of Ith order was determined by removing thin layers. With the carbon steel Ck 15 ist shown the effect of tempering on residual stresses in bath-nitrided and quenched specimens.
    Notes: Es wird über röntgenographische Spannungsmessungen an den Stählen Ck 45, 34 Cr 4, 34 Cr Al 6 und Ck 15 berichtet. Zylindrische Proben aus den Vergütungsstählen wurden im Ammoniak-Gasstrom und im Tenifer®-Salzbad nitriert und der Verlauf der Eigenspannungen I. Art durch Abtragen und mehrfaches Messen bestimmt. Am Beispiel des Kohlenstoffstahles Ck 15 wird gezeigt, wie sich eine thermische Nachbehandlung auf die Eigenspannungen badnitrierter und nach der Behandlung in Wasser abgeschreckter Proben aus diesem Werkstoff auswirkt.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040207
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  • 81
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    Äquidensiten als Hilfsmittel bei der Auswertung des Vernetzungsverlaufes eines Epoxidharzes (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 158-161 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Bei genügend asymmetrischen Reaktionsverhältnissen war es möglich, die Schwärzungsgrade eines Phasenfrontphotos mit Mikrohärtemessungen zu vergleichen. Mit Hilfe der Äquidensitendarstellung konnte die Auswertung polarisationsoptischer Aufnahmen von Vernetzungsfronten verbessert werden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040311
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  • 82
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    Kugelherstellung durch Pulveragglomeration (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 148-156 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Preparation of spheres by powder agglomeration. Some methods of producing spheres by powder agglomeration are described. The agglomerability of fine particles which is influenced by various parameters is qualitatively discussed. To produce spherical agglomerates that have smooth surfaces, low or no binder contents should be used. Besides the conditions for growth, internal structure and strength of agglomerates is dealt with. A variation of process parameters allows the preparation of different spherical structures.
    Notes: Die Verfahren der Kugelherstellung durch Agglomeration werden im Zusammenhang mit der Agglomerierfähigkeit von Pulvern diskutiert. Nur eine trockene bzw. eine Agglomeration mit geringen Bindemittelmengen führt zu ausreichend sphärischen Agglomeraten mit glatter Oberfläche. Neben den Bedingungen für das Wachstum werden der innere Aufbau und die Festigkeit der Kugeln behandelt. Eine Variation der Prozeßführung ermöglicht die Herstellung unterschiedlicher Kugelstrukturen.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040309
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  • 83
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    Halbleiterwerkstoffe, Herausgeber: Doz. Dr. -ing. habil. Hans-Friedrich Hadamovsky. 2. überarb. u. erweiterte Auflage, VEB Deutscher Verlag Für Grundstoffindustrie, Leipzig, 1972,. 334 Seiten, 283 Bilder, 45 Tabellen. pries DM 35,  -  (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 166-166 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040313
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  • 84
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    Neue Produkte, Maschinen, Geräte und Arbeitsverfahren (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 161-166 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040312
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  • 85
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    Elektronenstruktur und physikalische Eigenschaften metallischer Werkstoffe. Von einem Autorenkollektiv. VEB Deutscher Verlag für Grundstoffindustrie, Leipzig 1972, 303 Seiten, 198 Bilder, 19 Tabellen. Preis M 55, - (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 111-112 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040219
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  • 86
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    Werkstoffkunde NE-Metalle. Dr.-Ing. Bruno Beyer. 208 Seiten, 130 Bilder und 77 Tabellen. VEB Deutscher Verlag für Grundstoffindustrie Leipzig 1971 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 112-112 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040221
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  • 87
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    Masthead (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973) 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040301
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  • 88
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    Electronic Resource
    Werkstoffprobleme bei stromführenden Bauelementen und elektrischen Kontakten (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 114-117 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Technical problems of the material in current-carrying components and electrical contacts In this article are outlined the requirements of current-carrying connectors, sliding contacts and breaker contacts. For the latter, it is possible to effect a subdivision in different capacity groups, according to their switching power (stress). The different chemical and physical disturbances which may occur, can be mostly suppressed by choosing suitable alloys. After the enumeration of the basic rules, the author gives a concise outlook on the presumable future application of the mechanical or electromechanical operated switches.
    Notes: Es werden die Anforderungen der Elektrotechnik an stromführende Dauerverbindungen, Gleitkontakte und Unterbrecherkontakte umrissen. Für die zuletzt genannten Bauteile ist hinsichtlich ihrer Beanspruchung in gewissem Maße eine Unterteilung in verschiedene Leistungsgruppen möglich. Die hierbei auftretenden verschiedenen chemischen und physikalischen Störeffekte lassen sich weitgehend durch die Auswahl geeigneter Legierungen beherrschen. Nach der Aufzählung der zu beachtenden Grundregeln wird ein knapper Ausblick auf den wahrscheinlichen künftigen Einsatz von mechanisch oder elektro-mechanisch betätigten Schaltern gegeben.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040303
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  • 89
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    Entwicklungs- und Einsatzmöglichkeiten faserverstärkter Verbundwerkstoffe im Vergleich mit konventionellen WerkstoffenVortag, gehalten anläßlich der Tagung „Verbundwerkstoffe“ der DGM, 16. u. 17. März 1972 in Konstanz. (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 142-147 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Future Development and Application of Fibre Reinforced High-Performance Composites in Comparison with Conventional Materials. A review is given about the nowadays employed and new developed reinforcements and matrix systems including a critical comparison between advantages and disadvantages of each of the possible components. Special emphasis is given regarding mutual compatibility and processability into high-strength composites. The characteristics of technically producible composites as well as theoretically possible combinations are being critically compared with those of conventional materials and especially examined regarding its economical use. Several examples for a cost/benefit analysis and an optimal choice of materials are being stated and explained on special ranges of applications.Operational possibilities and limits in view of technique composites are being described which give a survey on the future chances of this category of materials.
    Notes: Es wird eine Übersicht über die derzeit einsetzbaren und in der Entwicklung befindlichen Faserwerkstoffe und Matrixsysteme mit einer kritischen Gegenüberstellung der Vor- und Nachteile der einzelnen möglichen Komponenten gegeben. Besonderes Gewicht wird dabei auf die gegenseitige Verträglichkeit und die Verarbeitbarkeit zu hochfesten Verbundwerkstoffen gelegt. Das Eigenschaftsbild der technisch herstellbaren Verbundwerkstoffe sowie theoretisch möglicher Kombinationen wird kritisch verglichen mit dem von entsprechenden konventionellen Werkstoffen und insbesondere im Hinblick auf eine wirtschaftliche Anwendung betrachtet. Verschiedene Möglichkeiten für eine Kosten/Nutzen-Analyse und eine optimale Werkstoffwahl werden aufgezeigt und an speziellen Anwendungsbeispielen erlätert.Einsatzmöglichkeiten und -grenzen in technischer und wirtschaftlicher Sicht und deren künftige Entwicklung für Faserverbundwerkstoffe werden dargestellt und damit ein Überblick über die Zukunftsaussichten dieser Werkstoffgruppe gegeben.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040308
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  • 90
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    Herausgeber: VEB GISAG Kombinat für Gießereiausrüstungen und Gußerzeugnisse - Forschungszentrum - Leipzig. VEB Deutschcer Verlag für Grundstoffindustrie, Leipzig 1971. 130 Seiten mit 389 Bildern. Preis M 30 -  (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 168-168 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040322
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  • 91
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    Maßänderungen von Zinkdruckgußlegierungen infolge von Alterung (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 333-340 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Changes in dimension of zinc die-casting alloys due to aging. It is known since a long time that die-cast elements are subject to slight changes in dimension even when they are made of high-grade zinc alloys standardized for that purpose. But in prior research it was apparently still unknown that the amount of these changes is influenced, among other things, by the cooling conditions of the pieces following the casting process. It is therefore impossible to compare off-hand the values coming from different sources.The changes in dimension were reinvestigated for that reason with regard to the cooling conditions, and the results were some new findings in this field.
    Notes: Es ist seit langem bekannt, daß Druckgußteile auch aus den hierfür genormten Feinzinklegierungen geringe Maßänderungen aufgrund von Alterung erleiden. Bei früheren Untersuchungen wußte man aber offenbar noch nicht, daß die Größe dieser Änderungen unter anderem auch von den Abkühlungsbedingungen der Teile nach dem Guß beeinflußt wird, wodurch aus verschiedenen Quellen stammende Werte nicht ohne weiteres vergleichbar sind.Die Maßänderungen wurden deshalb unter Berücksichtigung der Abkühlungsbedingungen erneut überprüft, wobei sich teilweise neue Erkenntnisse auf diesem Gebiet ergaben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040609
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  • 92
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    Durrer/Volker: Metallurgie der Ferrolegierungen. 2. neubearbeitete Auflage. Herausgegeben von G. Volkert, K.-D Frank. 700 Seiten, 362 Abbildungen. Springer-Verlag Berlin, Heidelberg, New York 1972 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 343-343 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040612
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  • 93
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    Qualitäts- und Edelstähle der Deutschen Demokratischen Republik, Band II: Eigenschaften, Behandlung, Verwendung, 3. verbesserte Auflage, 296 Seiten, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig 1972 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 344-344 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040616
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  • 94
    Electronic Resource
    Electronic Resource
    Die Bruchmechanik und ihre Anwendung auf Fragen der Bauteilzähigkeit  -  Anwendungsbeispiele (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 351-362 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040703
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  • 95
    Electronic Resource
    Electronic Resource
    Beobachtungen beim Einbau von SiC-Teilchen in galvanisch abgeschiedenem Nickel (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 374-378 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Observations on the incorporation of Siliconcarbide-Particles in Electrodeposited Nickel. Electrodeposited composite coatings with incorporated SiC-particles are produced by codeposition of nickel and SiC suspended in the plating bath. Until now the mechanisms of the deposition and incorporation of the particles in the matrix material are not fully known. In this paper some observations on the incorporation are described using scanning electron microscope techniques.
    Notes: Galvanisch hergestellte Nickeldispersionsschichten mit Einlagerungen von Siliziumkarbid (SiC) entstehen durch gleichzeitige Abscheidung von Nickel und im Elektrolyten in Suspension gehaltenen SiC-Partikeln. Ungeklärt ist bislang, nach welchen Mechanismen die Abscheidung (Annäherung an die Metalloberfläche und Haften) und der Einbau der Teilchen in der Nickelmatrix abläuft. Zur Klärung der Einbauvorgänge wurden einige Untersuchungen mit dem Rasterelektronenmikroskop durchgeführt.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040706
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  • 96
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    Die Schweißtechnische Praxis Band 9 zerstörende Schweißnahtprüfung  -  Was muß man über Prüfstücke und Proben wissen? von Dipl.- Ing. H. D. Weise, Ratingen, Format 16, 5 × 21 cm, 56 Seiten, 41 Bilder, 25 Tafeln, Deutscher Verlag für Schweißtechnik 1972, Preis DM 14,80 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 344-344 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040614
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  • 97
    Electronic Resource
    Electronic Resource
    Masthead (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973) 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040701
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  • 98
    Electronic Resource
    Electronic Resource
    Zeitstandfestigkeit des Stahles G-X 40 CrNiSi 25 20 (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 363-367 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Creep rupture strength of G - X 40 CrNiSi 25 20 steel. The material most commonly used at present for chemical furnace construction is G-X 40 CrNiSi 25 20 steel. Although extensive information is available with regard to the use of this alloy in reforming furnaces, there are hardly any data in the literature on the long-term behaviour as determined in creep rupture tests. The experiments described served to determine the creep rupture strength characteristics for dimensioning reformer pipes. On the basis of the results obtained in testing four different batches of G-X 40 CrNiSi 25 20 steel an attempt has been made to determine the scatter of the creep rupture strengths valid for this alloy.
    Notes: Der im Chemieofenbau z. Z. am häufigsten verwendete Werkstoff ist der G-X 40 CrNiSi 25 20. Obwohl für diese Legierung bereits umfangreiche Betriebserfahrungen über den Einsatz in Reformeröfen vorliegen, sind in der Literatur bisher kaum Daten über das im Zeitstandversuch ermittelte Langzeitverhalten zu finden. Die beschriebenen Versuche dienten der Ermittlung von Zeitstandfestigkeitskennwerten zur Dimensionierung von Reformerrohren. Anhand von vier verschiedenen, im Zeitstandversuch geprüften, Chargen des Stahles G-X 40 CrNiSi 25 20 wurde versucht, ein für diesen Werkstoff gültiges Streuband der Zeitstandfestigkeitskennwerte aufzuzeichnen.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040704
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  • 99
    Electronic Resource
    Electronic Resource
    Einige Gesichtspunkte für die Auswahl von Stählen in der chemischen Höchstdrucktechnik (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 401-409 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Some Aspects of Selecting Materials in the Chemical High Pressure Technology. Steels for chemical industry in the pressure range between 2000 and 3000 bar must have high yield strengths in order to be able to bear the static internal pressure. Even with high yield strengths the wall thickness is so high that steels must be selected which can be thoroughly and evenly quenched and tempered. They should be insensitive to tempering embrittlement.For components stressed by static internal pressure the safety against bursting and the bursting behaviour play a major rǒle. In addition to that, under pulsating pressures, the fatigue characteristics of a component are of importance. Steels with the high fatigue strengths necessary in high pressure application are notch sensitive. It is shown which measures are to be taken from the metallurgical side and in fabrication to increase their fatigue strength. Results of fatigue tests on high pressure tubes with different surface treatment are given. The fatigue strength can be improved by improving tube manufacturing, mechanically or electrochemically smoothening the inner tube surface, nitriding or autofrettage.For special purposes it is sometimes necessary to use steels whose strength is too low for high pressure applications. One must then apply a strength calculation conceding partial plastic deformation. This is illustrated for an age hardening austentitic steel.
    Notes: Stähle für Verfahren der chemischen Industrie im Druckbereich zwischen 2000 und 3000 bar müssen hohe Streckgrenzen aufweisen, um den statischen Innendruck aufnehmen zu können. Die notwendige Wanddicke verlangt gut durchvergütbare, gegen Anlaßversprödung unempfindliche Stähle. Während für Bauteile, die durch statischen Innendruck beansprucht werden, die Berstsicherheit und das Berstverhalten beachtet werden müssen, spielt bei wechselndem Innendruck zusätzlich die Dauerhaltbarkeit eine Rolle. Bei der erforderlichen, hohen Dauerfestigkeit sind die Stähle kerbempfindlich. Es wird gezeigt, welche Maßnahmen von seiten der Stahlherstellung und -verarbeitung zu einer Erhöhung der Dauerhaltbarkeit führen; Ergebnisse von Zugschwellversuchen an Höchstdruck-Rohrabschnitten mit unterschiedlicher Oberflächenbehandlung werden mitgeteilt. Als dauerfestigkeitssteigernd wirken sich neben einer Verbesserung des Rohrherstellverfahrens eine zusätzliche mechanische oder elektrochemische Glättung der Innenoberfläche, eine Nitrierung und das Autofrettieren aus.Für Sonderzwecke müssen gelegentlich Stähle eingesetzt werden, deren Streckgrenze für Höchstdruckanforderungen zu niedrig ist. Für diesen Fall wird auf die Berechnungsmöglichkeit mit Zulassung einer teilplastischen Verformung eingegangen, die am Beispiel eines aushärtenden austenitischen Stahles erläutert wird.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040802
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  • 100
    Electronic Resource
    Electronic Resource
    Neue produkte, Maschinen, Geräte und Arbeitsverfahren (1973)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 4 (1973), S. 448-451 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19730040809
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