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  • 1970-1974  (11,235)
  • Polymer and Materials Science  (10,782)
  • Ultrastructure  (453)
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  • 1
    Electronic Resource
    Electronic Resource
    Electron microscopic studies of the innervation of the rat kidney (1974)
    Springer
    Anatomy and embryology 145 (1974), S. 169-186 
    Details
    ISSN: 1432-0568
    Keywords: Renal innervation ; Rat ; Peripheral nerves ; Neuroeffector zones ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der Rattenniere werden die muskelzellhaltigen arteriellen Gefäße und der juxtaglomeruläre Apparat innerviert. Blutgefäße mit Pericyten, porenhaltige Capillaren sowie die Tubuli der Rinde und des Markes werden nicht von Nervenfasern begleitet. Ganglienzellen wurden in der Rattenniere nicht beobachtet. Periphere Nerven mit einem ein-bis zweischichtigen Perineurium kommen im paravasalen Gewebe der Interlobar- und Arcuata-Arterien vor; sie enthalten neben zahlreichen marklosen Nervenfasern gewöhnlich auch 2–4 markhaltige. Nervenfaser-Bündel ohne perineurale Scheide finden sich im paravasalen Gewebe der Arcuata- und Interlobular-Arterien. Darüber hinaus sind in unmittelbarer Nachbarschaft der großen Arterien (Interlobar-, Arcuata- und Inter-lobular-arterien) und der Vasa afferentia marklose Nervenfasern und freie Axone vorhanden, die auch die proximalen Abschnitte der Vasa efferentia der subcapsulären und intermediären Rindenschicht begleiten. Im Nierenmark werden die juxtamedullären Vasa efferentia und die Arteriolae rectae innerviert; marklose Nervenfasern und freie Axone sind nur bis zur Außen-Innenstreifen-Grenze nachweisbar. Die Innervation der muskelzellhaltigen arteriellen Gefäße erfolgt durch aufgetriebene Axonabschnitte (Neuroeffektor-Zonen), die vorwiegend agranuläre Vesikel enthalten. Diese Strukturen liegen stets an der Grenze von Adventitia und Media bzw. Elastica externa; zwischen den glatten Muskelzellender Media wurden keine vesikelhaltigen Axonabschnitte gefunden. Als minimaler Abstand zwischen den vesikelhaltigen Axonabschnitten und den von einer Basalmembran umschlossenen glatten Muskelzellen (neuromuskuläre Distanz) wurden 600 Å gemessen. Die vorliegenden Ergebnisse werden mit den fluoreszenzmikroskopischen und histochemischen Untersuchungen über die adrenerge und cholinerge Innervation der Niere verglichen. Die sich aus diesem Vergleich ergebenden Probleme und funktionellen Konsequenzen für die Innervation der Niere sowie die Natur der cholinergen Fasern (afferente oder postganglionäre parasympathische Fasern) werden diskutiert.
    Notes: Summary The innervation of the rat kidney is defined by a system which supplies those arterial blood vessels whose walls contain smooth muscle cells and the juxtaglomerular apparatus. Vessels containing pericytes, or those vessels composed of an endothelium only, as well as the tubules of both the cortex and medulla, are not innervated. Furthermore, ganglion cells do not occur in the rat kidney. The nervous apparatus of the rat kidney consists of peripheral vegetative nerves, ensheathed by a perineurium, with 2–4 myelinated fibers running in the paravasal tissue of the interlobar and arcuate arteries, and of nerve bundles without a perineurial sheath in the paravasal tissue of the arcuate and interlobular arteries. Non-myelinated fibers and free axons occur in the immediate vicinity of the great arteries (interlobar, arcuate, and interlobular) and the vasa afferentia. Nerve fibers and free axons are also seen in the vicinity of only the proximal parts of those vasa efferentia which supply the cortical capillary plexus. The arteriolae rectae of the medulla, and their vasa efferentia, from which they arise, are innervated by non-myelinated fibers and free axons which accompany these arterial vessels only to the boundary of the outer and inner stripe of the outer zone of the medulla. The functional innervation of those vessels with smooth muscle cells results from neuro-effector zones which predominantly show agranular vesicles. These structures were never seen between the smooth muscle cells within the media; the minimum neuromuscular distance was 600 Å. The present findings are correlated with the lightmicroscopically demonstrated adrenergic and cholinergic innervation. The resultant problems and functional consequences of the innervation of the kidney, especially the nature of the cholinergic fibers (afferent or post-ganglionic parasympathetic fibers) are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519727
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  • 2
    Electronic Resource
    Electronic Resource
    Evolution ultrastructurale du labyrinthe de placenta de chatte (1974)
    Springer
    Anatomy and embryology 146 (1974), S. 1-20 
    Details
    ISSN: 1432-0568
    Keywords: Placenta ; Cat ; Differentiation ; Function ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'ultrastructure du labyrinthe de placenta de chatte a été étudiée du 45e au 63e jour de gestation. Cette formation endothéliochoriale est composée: d'un endothélium maternel hypertrophié et de cellules géantes déciduales; d'une couche de «substance inerte interstitielle»; du trophoblaste constitué d'une assise syncytiale continue (syncytiotrophoblaste) et d'une assise cellulaire discontinue (cytotrophoblaste); d'un endothélium foetal accompagné de son environnement mésenchymateux. Les capillaires foetaux envahissent progressivement le syncytiotrophoblaste. L'hypertrophie de l'endothélium maternel diminue en fin de gestation; de ce fait la distance, séparant le sang maternel du sang foetal, peut atteindre en certains points 2 μ. L'endothélium maternel, le syncytiotrophoblaste et l'endothélium foetal présentent des signes ultrastructuraux d'un rôle de transfert. La «substance inerte inerte interstitielle», qui sépare les tissus d'origine maternelle des tissus d'origine foetale, est constante mais d'épaisseur variable; elle est spécifique des structures endothéliochoriales. Les cellules géantes déciduales, dont le nombre diminue en fin de gestation comportent parfois un ou plusieurs «corps glycogéniques». Le syncytiotrophoblaste, siége d'activité de biosynthése de stéroïdes, est riche en ergastoplasme, ce qui autorise à postuler la synthése d'hormones protéiques.
    Notes: Summary The ultrastructure of feline placental labyrinth has been studied from the 45th to the 63rd day of gestation. The endotheliochorial structure is composed of: a thick hypertrophied maternal endothelium with giant decidual cells; an “interstitial inert substance”; a continuous syncytial layer (syncytiotrophoblast) and a discontinuous cellular layer (cytotrophoblast) of trophoblast; and a thin foetal endothelium with its surrounding mesenchyme. Foetal capillaries increasingly invade the syncytiotrophoblast. Maternal endothelial hypertrophy is reduced in the last days of gestation. Thus the interval between maternal and foetal bloods may in some areas become 2 μ, in late pregnancy. Foetal endothelium, syncytiotrophoblast, and maternal endothelium demonstrate ultrastructural features of transfer function. The “interstitial inert substance”, which separates maternal from foetal tissue was always evident though with variable thickness. The giant decidual cells which are reduced in late pregnancy, show one or several “glycogen bodies”. The syncytiotrophoblast, where some steroïd biosynthesis has been demonstrated, has an extensive rough endoplasmic reticulum suggestive of protein hormone synthesis activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341379
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  • 3
    Electronic Resource
    Electronic Resource
    The structure of the myosatellite cells in axial muscles of the sharkGaleus melastomus (1974)
    Springer
    Anatomy and embryology 147 (1974), S. 35-44 
    Details
    ISSN: 1432-0568
    Keywords: Myosatellite cells ; Shark ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The myosatellite cells in the axial muscles of the sharkGaleus melastomus is found more frequently in the red muscle fibers than in the white fibers. The total length of the cell extensions is about 100 μm. In about 20% of all cases, the extensions were present in pairs, and it is concluded that the satellite cell processes bifurcate. Processes towards the intercellular space and towards the interior of the muscle fiber are also described. The cytoplasm of the satellite cells contain glycogen, Golgi elements, lysosome-like vesicles, granular endoplasmic reticulum and microtubules. It is concluded that the morphology of the satellite cells indicates a more active function than that of a dormant reserve myoblast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317962
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  • 4
    Electronic Resource
    Electronic Resource
    The ultrastructure of the thin loop limbs of the mouse kidney (1974)
    Springer
    Anatomy and embryology 147 (1974), S. 1-18 
    Details
    ISSN: 1432-0568
    Keywords: Mouse kidney ; Thin limbs ; Ultrastructure ; Renal concentrating mechanism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The thin limbs of the loops of Henle in the mouse kidney have been investigated by conventional electron microscopy. Resulting from light microscopic investigations, a distinction in the epithelia of short and long loops can be demonstrated. Ultrastructurally, the thin limbs (descending) of short loops are composed of a uniformly thin and simple epithelium. In contrast, long loops (thin descending and ascending) are composed of three different epithelial types which are representative of a distinctly more complex epithelial system. Two epithelial types were observed in the thin descending limbs of long loops and the third type was observed in the ascending thin limbs. Based upon these findings it is suggested that the thin descending limbs of short and long loops of Henle in the mouse kidney cannot perform the same functions in the renal concentrating mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317960
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrastructural studies on the intercellular bridges between the oocyte and follicle cells in the lizard Acanthodactylus scutellatus hardyi (1974)
    Springer
    Anatomy and embryology 143 (1974), S. 239-254 
    Details
    ISSN: 1432-0568
    Keywords: Oocyte ; Follicle cells ; Intercellular bridges ; Lizard ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. Intercellular bridges connect the oocyte with its surrounding follicle cells. 2. Fibrillar bundles and microtubules are oriented along the length of the bridge. Mitochrondria, endoplasmic reticulum, multivesicular vesicles and other cytoplasmic components are also present in this region. 3. This communication may be very important for the flow of nutrients necessary for the growth of the oocyte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519868
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  • 6
    Electronic Resource
    Electronic Resource
    Differentiation of mouse leydig cell in anterior chamber of the rat eye (1974)
    Springer
    Anatomy and embryology 146 (1974), S. 219-224 
    Details
    ISSN: 1432-0568
    Keywords: Leydig cells ; Differentiation ; Explants ; Ultrastructure ; Mouse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Testes of newborn mice not older than one day were transplanted into the anterior chamber of one eye of an adult male white Holtzman rat. The events observed in the Leydig cells of the grafted testes can be divided into two periods. Period one is marked by differentiation; period two, by dedifferentiation. In period one, the lipid and glycogen inclusions disappear, possibly owing to the gonadotropins of the host. In period two, which starts after day 15 post-grafting, the lipids and glycogen reappear; the Leydig cells now contain residual bodies, whereas the S.E.R. disappears. Immunological mechanisms can be implicated; it is suggested that the Leydig cells dedifferentiate because the host's gonadotropins may be incapable of evoking and/or activating the genetic memory of the grafted Leydig cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315597
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  • 7
    Electronic Resource
    Electronic Resource
    Ultrastructure of cleavage stages and preimplantation embryos of the baboon (1974)
    Springer
    Anatomy and embryology 147 (1974), S. 45-62 
    Details
    ISSN: 1432-0568
    Keywords: Baboon ; Cleavage stages ; Embryos ; Preimplantation ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La structure et l'ultrastructure des embryons de babouin sont étudiées dans la période précédant l'implantation. Six stades du développement embryonnaire sont observés 2, 3, 4, 5, 7 et 8 jours après la date présumée de fécondation. Dans les 3 premiers cas, on compte respectivement 2, 8 et 24 blastoméres. A 5 jours, il y a 30 à 40 cellules et un nombre dépassant 60, ultérieurement. Des cellules trophoblastiques primitives se différencient à 7 jours et une cavité de segmentation en forme de croissant apparaît au 8 ème jour. La zone pellucide est toujours présente à 8 jours, la période de préimplantation semblant plus longue chez le babouin que chez l'homme. Des particules de type C sont décrites dans la zone pellucide et les espaces périvitellin et interblastomériques. La transformation des mitochondries, des changements dans la répartition des ribosomes, des corps multivésiculaires, pseudocristallins et figures myéliniques, des nucléoles et amas granuleux intra-nucléaires s'observent chez le babouin comme chez certains autres Mammifères; par contre, les faisceaux fibrillaires cytoplasmiques sont absents. L'étude des changements de l'ultrastructure provoqués par des hormones et drogues permettrait de mieux évaluer la nocivité de ces substances pendant les premiers stades du développement embryonnaire des Primates.
    Notes: Summary The baboon preimplantation stages were examined using light and electron microscopy. Six cases were studied at 2, 3, 4, 5, 7 and 8 days estimated fertilization age. The first 3 specimens were composed of 2, 8 and 24 blastomeres respectively. At 5 days, 30 to 40 cells were counted and more than 60 cells in later stages. Primitive “trophoblast cells” differentiate at 7 days and a crescentic blastocoele appears at 8 days. Shedding of the zona pellucida is not observed in the 7 and 8 day specimens. The preimplantation period is longer in the baboon than in man. C-type viruses are observed in the zona pellucida, in the perivitelline and interblastomeric spaces. Microvilli and caveolae cover the periphery of the baboon conceptus. As in many other mammals, transformation of the mitochondria, changes in the ribosomes distribution, multivesicular bodies, myelin figures, nucleoli and intranuclear clusters of granules are described in the baboon. Cytoplasmic fibrous strands are not present as in the mouse. Experiments on the influence of hormones and drugs on ultrastructural changes would help to evaluate the importance of biohazards during the early development of primates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317963
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  • 8
    Electronic Resource
    Electronic Resource
    Ultrastructural alterations of rat brain microglial cells and pericytes after chronic lead poisoning (1974)
    Springer
    Acta neuropathologica 28 (1974), S. 25-35 
    Details
    ISSN: 1432-0533
    Keywords: Chronic Lead Intoxication ; Rat ; Ultrastructure ; Microglia ; Pericytes ; Monocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Wistar rats of both sexes and the same litter were exposed to chronic lead intoxication from birth untill sacrifice 9 months later. Lead was administered as 0.4% solution of lead nitrate in drinking water. Samples from the parietal brain cortex were examined electron microscopically following intracardiac perfusion with paraformaldehyde-glutaraldehyde solution. Similar changes were observed in the microglial cells and the vascular pericytes whereas all the other tissue elements appeared intact. Both cell types hypertrophied, the microglia assumed characteristic spindle or rod shape, the cell organelles increased, the microglial endoplasmic reticulum widened strongly and a large number of lipid inclusions appeared. The latter consisted of large lipid droplets of varying size and shape, containing multiple zones of low density, and a dense component with a coarse granular structure. The similarity in the response of both cell entities to the lesion as well as some probable functions of microglial cells and their relationship to vascular pericytes are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687515
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  • 9
    Electronic Resource
    Electronic Resource
    Fatal polymyositis: Morphogenesis and ultrastructural features (1974)
    Springer
    Acta neuropathologica 29 (1974), S. 251-262 
    Details
    ISSN: 1432-0533
    Keywords: Polymyositis ; Ultrastructure ; Histiocytes ; Birbeck Granules ; Macrophages
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A fatal case of polymyositis in a young female is presented. Two muscle biopsies obtained before and after treatment with large doses of steroids, as well as autopsy tissue, demonstrated widespread degeneration of myofibres associated with cytoplasmic tuboreticular structures resembling paramyxovirus nucleocapsids in capillary endothelial cells and fibroblasts. Aggregates of spherical particles and “simple and granular” nuclear bodies suggested a virus-related or associated etiologic agent. In addition, interstitial cells of mesenchymal origin, probably related to macrophages or histiocytes were present. These contained numerous rodlike profiles or phagolysosomal bodies which resembled “Birbeck” granules. Inflammatory response was very scant. It would appear that polymyositis probably represents a primary reaction to antigemic substances and a morphologic manifestation of altered host macrophage response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00685260
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  • 10
    Electronic Resource
    Electronic Resource
    Ultrastructure of the optic nerve in Schilder's disease, Devic's Disease and Disseminated Sclerosis (1974)
    Springer
    Acta neuropathologica 30 (1974), S. 225-242 
    Details
    ISSN: 1432-0533
    Keywords: Ultrastructure ; Optic Nerve ; Schilder's Disease ; Devic's Disease ; Disseminated Sclerosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructure of the optic nerve is described and compared in: a)Schilder's Disease, b)Devic's Disease, c)Disseminated Sclerosis. a) Schilder's Disease. Parts of the nerve were demyelinated, sometimes extensively so and from these regions the oligodendrocytes had disappeared and there was proliferation of astrocytes. Parallel bundles of fibres with a “railway line” formation, occurred in the cytoplasm of the astrocytes. Phagocytes infiltrated the damaged nerve bundles and the fibrous septa between them. Osmiophilic particles occurred in the astrocytes, capillary endothelial cells and in the phagocytes. The collagen fibres of some septa were widely separated presumably by fluid. b) Devic's Disease. This condition occurred in a patient with active pulmonary tuberculosis. The nerve was extensively demyelinated and showed absence of oligodendrocytes, proliferation of astrocytes and infiltration by macrophages. Some astrocytes possessed Rosenthal fibres. Intranuclear inclusions occurred in the astrocytes and electron dense cytoplasmic inclusions in the capillary endothelial cells and the macrophages. c) Disseminated Sclerosis. Parts of the nerve were partially and other parts completely demyelinated. Oligodendrocytes were absent from the completely demyelinated zones but were present in the partially demyelinated zones. In and around the demyelinated regions, there was proliferation of astrocytes and they frequently exhibited the “railway line” patterns in their cytoplasm. Phagocytes were frequent amongst the degenerating myelin and the proliferating astrocytes and also in the fibrous septa. Some macrophages presented intranuclear inclusions having a “corn on the cob” appearance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688923
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  • 11
    Electronic Resource
    Electronic Resource
    Ultrastructure of cerebral vessels in chick embryo in lead intoxication (1974)
    Springer
    Acta neuropathologica 30 (1974), S. 287-294 
    Details
    ISSN: 1432-0533
    Keywords: Lead Toxicity ; Brain ; Cerebral Endothelium ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructure of cerebral vessels was studied at various stages of brain development in chick embryos exposed to lead intoxication when they were 4 days old. The endothelial cells showed swelling of mitochondria, presence of many cytolysosomal structures, many tubular bodies, and coated vesicles. A few vessels showed attenuation on the lining endothelial cells. The significance of these morphological alterations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697011
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  • 12
    Electronic Resource
    Electronic Resource
    The fine structure of cerebral blood vessels in chick embryo (1974)
    Springer
    Acta neuropathologica 30 (1974), S. 277-285 
    Details
    ISSN: 1432-0533
    Keywords: Chick Embryo ; Brain ; Blood Vessels ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of the blood vessels was studied in the developing brain of chick embryo. The blood vessels were present in the embryos first examined (4 days after incubation) and their number increased in subsequent stages. The endothelial cells were generally large and showed junctional complexes, many microvilli and a large number of cytoplasmic organelles. Many tubular bodies and coated vesicles were also present. The tubular bodies were sometimes noted near the Golgi apparatus, suggesting their origin from this organelle. The mitochondria in the endothelial cells were generally larger than those in the surrounding neuropil. An ill-defined basement membrane-like substance was noted outside some endothelial cells on the 11th day and well formed basement membrane was present in the vessels of 18 day old embryos. A complete subpial astrocytic basement membrane was present from the early stage studied (4 days).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697010
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  • 13
    Electronic Resource
    Electronic Resource
    A comparison of the fine structure of small blood vessels in intracranial and retroperitoneal malignant lymphomas (1974)
    Springer
    Acta neuropathologica 27 (1974), S. 93-104 
    Details
    ISSN: 1432-0533
    Keywords: Malignant Lymphoma ; Blood Vessels ; Lymphe Node ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of the blood vessels of an apparently primary intracerebral malignant lymphoma was compared with those in another malignant lymphoma in a retroperitoneal lymph node. The essential features of the blood vessels in both cases were the same. They resembled the blood vessels found in normal lymph nodes and were both distinctly different from those seen in normal brain. It was concluded that the direction of differentiation of the blood vessels which arise to nourish the neoplastic tissue is determined by the nature of the tumor rather than the vessels from which they originate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687160
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  • 14
    Electronic Resource
    Electronic Resource
    Histochemistry and ultrastructure of atypical myoclonus body (type II) (1974)
    Springer
    Acta neuropathologica 28 (1974), S. 45-54 
    Details
    ISSN: 1432-0533
    Keywords: Myoclonic Epilepsy ; Atypical Myoclonus Body (Type II) ; Histochemistry ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Histochemical studies of type II myoclonus bodies demonstrated that they were composed of a saccharide-lipid complex with a small amount of protein. In particular, they contained phospholipid, ganglioside and sphingomyelin. The ultrastructure of the bodies revealed that they were bound by a membrane. They were diffusely stippled or homogeneous. They were not formed of filaments or lamellae. Some correlation with microbody or lysosomal structures in association with degeneration of the neurone was suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687517
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  • 15
    Electronic Resource
    Electronic Resource
    Ultrastructure of the outer cortex and thepia mater in man (1974)
    Springer
    Acta neuropathologica 28 (1974), S. 79-86 
    Details
    ISSN: 1432-0533
    Keywords: Ultrastructure ; Human Outer Cortex ; Pia Mater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The pia mater consists of a single, interrupted layer of elongated cells which lie fairly close to the surface of the cortex. Granular material and some collagen fibres lie between the pial cells and the cortex, a greater amount of collagen being present where the pial cells are discontinuous. Basement membrane covers the outer aspect of the cortex, the outer layer of which is formed by interlacing astrocyte processes of varying size. The processes are closely applied with occasional desmosomes between them. Projections of astrocyte processes of different dimensions covered by basement membrane extend at irregular intervals from the cortex into the subarachnoid space.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687521
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  • 16
    Electronic Resource
    Electronic Resource
    Profound muscle weakness associated with axis cylinder ballooning (1974)
    Springer
    Acta neuropathologica 28 (1974), S. 87-92 
    Details
    ISSN: 1432-0533
    Keywords: Neuroaxonal Dystrophy ; Hallervorden-Spatz Disease ; Mitochondria ; Axonal Swelling ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Multifocal central white matter axonal swelling characterized electron microscopically by focal axonal mitochondrial and membraneous body enrichment occurred in a 52 year old man who presented with the chief complaint of severe progressive muscular weakness accompanied by disorientation. The clinical and pathological findings in this patient appear unique and are presented in order to broaden our concepts of axis cylinder pathology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687522
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  • 17
    Electronic Resource
    Electronic Resource
    Une inclusion musculaire atypique rare: Les «corps en empreintes digitales» ou «fingerprint bodies» (1974)
    Springer
    Acta neuropathologica 27 (1974), S. 61-68 
    Details
    ISSN: 1432-0533
    Keywords: Muscular Pathology ; Ultrastructure ; Abnormal Muscular Inclusion ; Fingerprint Bodies ; Myofilament Synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary “Fingerprint bodies” are added to the “atypical” formations described in diseased muscle. These subsarcolemmal inclusions are variable in size and number, not membrane-bound and are formed by fine microtubules. They are not characteristic of a specific muscular disease and occur probably along with a focal anomaly of myofilament synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687241
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  • 18
    Electronic Resource
    Electronic Resource
    Tubular structures in arachnoid cells (1974)
    Springer
    Acta neuropathologica 27 (1974), S. 363-368 
    Details
    ISSN: 1432-0533
    Keywords: Parallel and Concentric Tubules ; Arachnoid Cells ; Cerebral Glioma ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Parallel and concentric tubules were observed in the cytoplasm of arachnoid cells overlying cerebral gliomas. The parallel tubules were 400–500 Å wide. Their electron dense walls, 150 Å thick lay 200–250 Å apart with distensions up to 400 Å in diameter at irregular intervals between the walls. The walls formed terminal loops limiting up to 4 adjacent tubules; transverse extensions were present between adjacent walls. The tubules sometimes communicated with the rough endoplasmic reticulum from which they may possibly arise. The concentric tubules were 250 Å wide: they communicated at irregular intervals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690700
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  • 19
    Electronic Resource
    Electronic Resource
    Die Leber bei der progressiven Myoklonusepilepsie (Lafora's disease) (1974)
    Springer
    Journal of molecular medicine 52 (1974), S. 559-567 
    Details
    ISSN: 1432-1440
    Keywords: Progressive myoclonus epilepsy (Lafora's disease) ; Type I (Unverricht, Lundborg) ; Type II ; Liver findings ; Clinical aspects ; Histology ; Ultrastructure ; Histochemistry ; Biochemistry ; Glycogenosis type IV ; Progressive Myoklonusepilepsie (Laforasche Erkrankung) ; Typ I (Unverricht, Lundborg) ; Typ II ; Leberbefunde ; Klinik ; Histologie ; Ultrastruktur ; Histochemie ; Biochemie ; Glykogenose Typ IV
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Dem klinischen Bild der progressiven Myoklonusepilepsie (Lafora's disease) liegt eine kongenitale Stoffwechselanomalie mit Ablagerung pathologischer Stoffwechselprodukte vorwiegend im Zentralnervensystem zugrunde. Der häufigere Typ I (Typ Unverricht, Typ Lundborg) zeigt eine regelmäßige Mitbeteiligung von Leber und Myokard sowie teilweise der Muskulatur, der seltenere Typ II ist mit seiner Speicherung nur auf das Zentralnervensystem beschränkt. Die Kenntnis der charakteristischen Leberbefunde kann einmal eine Hilfe sein für die klinische Unterscheidung von Typ I und Typ II, unspezifisch degenerativen Formen der Myoklonusepilepsie sowie gegenüber der myoklonischen Variante der amaurotischen Idiotie. Als eine weitere Möglichkeit könnte das bisher unbekannte Speicherprodukt und der auslösende spezifische Enzymdefekt auf diesem Wege identifiziert werden. Lichtmikroskopisch zeigen die Leberzellen — vorwiegend der Läppchenperipherie — und gelegentlich auch die Kupfferschen Sternzellen eine PAS-positive homogene Speichersubstanz, die in Übereinstimmung mit den Befunden am Zentralnervensystem und am Myocard elektronenoptisch aus granulärem und filamentärem Material aufgebaut ist. Die Deutung der einzelnen Untersucher hinsichtlich der histochemischen und biochemischen Ergebnisse variiert: die Natur des Ablagerungsproduktes wird als Mucopolysaccharid aber auch als Polyglucosan angesprochen. Übereinstimmend sieht man aber die Hauptstörung im Bereich des Kohlenhydratstoffwechsels. Die hier demonstrierten bemerkenswerten licht- und elektronenmikroskopischen Übereinstimmungen mit der Glykogenose Typ IV lassen nach unserer Auffassung nahe Beziehungen zur Gruppe der Glykogenosen annehmen. Als Thesaurismose ist die Laforasche Erkrankung eine potentielle Vorstufe der Cirrhose. Es entwickelt sich eine mehr oder minder ausgeprägte Mesenchymbeteiligung im Sinne einer chronischen Hepatitis. Eine komplette Cirrhose ist jedoch selbst bei den Spätfällen nicht nachzuweisen. Eine Hepatomegalie als Folge der Speicherung fehlt. Spezifische Leberproben fallen negativ aus. Das klinische Bild wird nicht von Seiten der Leber, sondern ausschließlich von der progredienten neurologisch-psychiatrischen Symptomatik der Myoklonusepilepsie geprägt.
    Notes: Summary The cause of clinical manifestations of progressive myoclonus epilepsy (Lafora's disease) is an inborn error of metabolism characterised by deposition of pathologic metabolic products in the central nervous system. In the most common type I (Type Unverricht, Type Lundborg) these deposits are regularly located in liver and myocard, and in some cases also in sceletal muscle. In the less common type II they are found only in the central nervous system. The characteristic liver findings might help to distinguish type I, type II, unspecific degenerative forms of myoclonic epilepsy and the myoclonic form of amaurotic idiocy. They also might be valuable in identification of yet unknown specific enzyme defect leading to tissue deposits. Our light microscopy observations demonstrate deposits of a PAS-positive homogene substance in liver cells—especially in the periphery of lobule— and sometimes in Kupffer cells. By electron microscopy this substance is identified as granular and filamentary material. This corresponds to our findings in the central nervous system and myocard. The interpretation of existing histochemical and biochemical studies did not yet solve the question, if the mentioned deposits are mucopolysaccharides or polyglucosanes, however, it is recognized that the main disorder is an error in carbohydrate metabolism. The notable similarity of our light- and electronmicroscopic observations to results obtained in glycogenosis type IV suggest that Lafora's disease might be another form of glycogenosis. As a thesaurismosis Lafora's disease can predispose to cirrhosis. The activation of mesenchyme, less or more pronounced, corresponds to chronic hepatitis. And even in the late forms a complete cirrhosis is not found. This thesaurismosis does not lead to hepatomegaly. Specific liver function tests are negative. The clinical course is characterised not by liver symptoms but by the neurologic and psychiatric symptoms of progressive myoclonic epilepsy.
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    URL: http://dx.doi.org/10.1007/BF01468496
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    Wall ultrastructure ofScenedesmus culture N 46 (1974)
    Springer
    Archives of microbiology 96 (1974), S. 145-153 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Scenedesmus Bristles ; Openings ; Props ; Ridges ; Tubules ; Brisble Origin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Bristles radiating from openings were detected on colonies and unicells ofScenedesmus culture N 46, when examined with transmission and scanning electron microscopes. Although narrower, they correspond in gross appearance and ultrastructure to previously describedScenedesmus bristles. Openings, bordered by a series of props, are unlike those ofScenedesmus culture 614. Additional props are observed scattered independently on the cell wall; ridges are composed of a linear row of props. Sections of cells, or cell walls, reveal an additional prop, situated inside the openings; these props are composed of several tubules. Possible extrusion of bristles through these tubules, as well as the origin of the bristle from the cavity and vesicles immediately under the opening are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00590171
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    Nitrogen metabolism and ultrastructure inAnabaena cylindrica (1974)
    Springer
    Archives of microbiology 96 (1974), S. 271-279 
    Details
    ISSN: 1432-072X
    Keywords: Anabaena cylindrica ; Nitrogen Starvation ; Pigmentation ; Ultrastructure ; Heterocyst Differentiation ; Nitrogenase Activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nitrogen starvation, effected by incubating a culture ofAnabaena cylindrica in a medium free from combined nitrogen and under an atmosphere of 1% CO2 in argon, leads to rapid and characteristic changes in the appearance, structure and function of the alga. Change of colour, due apparently to a decrease in the amounts of nitrogenous pigments, is accompanied by a structural transformation of vegetative cells: cyanophycin granules and polyhedral bodies disintegrate, lipid and glycogen accumulate, and large membrane-bound spaces form by means of thylakoid swelling and vesiculation. The rate of heterocyst differentiation and nitrogenase activity is increased. These changes are fully reversed on addition of ammonia to the culture. It appears that thylakoids reform by coalescence of small vesicles assembled in the intrathylakoidal space. Rapid ammonia assimilation is indicated by ample formation of cyanophycin granules in vegetative cells and of “plugs” in the heterocysts.
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    URL: http://dx.doi.org/10.1007/BF00590183
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    Nitrogen metabolism and ultrastructure inAnabaena cylindrica (1974)
    Springer
    Archives of microbiology 99 (1974), S. 221-230 
    Details
    ISSN: 1432-072X
    Keywords: Anabaena cylindrica ; Molybdenum ; Vanadium ; Nitrogenase ; Ultrastructure ; Storage Products ; Heterocyst Frequency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The structural and functional symptoms of molybdenum deficiency inAnabaena cylindrica grown in a medium without combined nitrogen and thus dependent on fixation of elemental nitrogen, resemble those brought about by nitrogen starvation. However, the substantially increased rate of heterocyst differentiation in this culture is not accompanied by a corresponding increase in nitrogenase activity; on the contrary, enzyme activity is severely impaired in the absence of molybdenum. When the supply of molybdenum, or of ammonia, is restored, the alga recovers rapidly. Vanadium exerts an inhibitory effect upon nitrogen-fixing ability of the alga, and its presence in the molybdenum-deficient culture results in the amplification of the symptoms of mlybdenum deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696236
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    Occurrence of microbodies in chloromonadophycean algae (1974)
    Springer
    Archives of microbiology 99 (1974), S. 265-269 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Microbodies ; Vacuolaria ; Gonyostomum ; Chloromonadophyceae ; Chromophyta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Microbody-like organelles occur in the cytoplasm of two chloromonadophycean algae,Vacuolaria virescens Cienkowsky andGonyostomum semen Diesing. Microbodies ofVacuolaria andGonyostomum have a granular matrix which lacks a crystalloid core; they are often present in close association with elements of the endoplasmic reticulum. The occurrence of microbodies in other algae is briefly reviewed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696241
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    A study of sporophore development in the myxomyceteProtophysarum phloiogenum (1974)
    Springer
    Archives of microbiology 99 (1974), S. 331-344 
    Details
    ISSN: 1432-072X
    Keywords: Myxomycetes ; Ultrastructure ; Development ; Systematics ; Food Vacuoles ; Stalk Development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Observations of sporophore development in fresh and glutaraldehydeosmium sequentially-fixed material ofProtophysarum phloiogenum show the following sequence. Small plasmodia cease streaming and round up. Food vacuoles collect in the lower center of the cytoplasmic mass. As the cytoplasm rises the food vacuolar contents are excluded from the plasmalemma and become the stalk core. A continuous, fibrous peridium and stalk tube enclose cytoplasm and stalk core respectively. Capillitial formation just precedes spore cleavage. Sporophore development is marked by autophagic activity and calcium deposition. Stalks of dried herbarium specimens of seven additional species have been examined. A mature stalk morphology very similar toProtophysarum with recognizable remnants of microorganismal food material is seen in all of them. It is thought that this marker is indicative of non-stemonitaceous stalk development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696247
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    A cyanobacterium which lacks thylakoids (1974)
    Springer
    Archives of microbiology 100 (1974), S. 419-436 
    Details
    ISSN: 1432-072X
    Keywords: Gloeobacter violaceus ; Photosynthetic Pigments ; DNA Base Composition ; Fatty Acid Composition ; Cyanobacterium ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gloebacter violaceus gen. and sp. n. is a unicellular photosynthetic prokaryote of unusual cellular structure. The only unit membrane in the small, rod-shaped cells is the cytoplasmic membrane, which has a simple contour, without intrusions. Immediately underlying it is an electron-dense layer 80 nm thick. Gloeobacter is an aerobic photoautotroph which contains chlorophyll α, β-carotene and other carotenoids, allophycocyanin, phycocyanin and phycoerythrin. Chlorophyll and carotenoids are associated with the particulate fraction of cell-free extracts, and are thus probably localized in the cytoplasmic membrane. The phycobiliproteins may be associated with the electron-dense 80 nm layer. The DNA contains 64.4 moles percent GC. The cellular lipids have a high content of polyunsaturated fatty acids, largely linoleate and γ-linolenate. Despite its atypical fine structure, Gloeobacter is evidently a cyanobacterium, sufficiently different from other unicellular cyanobacteria to be placed in a new genus.
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    URL: http://dx.doi.org/10.1007/BF00446333
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    An ultrastructural study of septal dissolution inSchizophyllum commune (1974)
    Springer
    Archives of microbiology 96 (1974), S. 175-182 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Septa ; Schizophyllum ; Dissolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A strain ofSchizophyllum commune carrying a mutation in theB-mating factor (B-mut) shows septal dissolution when grown at 30° C for 2 to 3 days. The septa are intact if the organism is grown at 25° C for the same time, but begin to break down within 1 h after transfer to 30° C. At the ultrastructural level the dolipore swelling is the first part of the septal apparatus to be degraded, closely followed by the disorganization of the parenthesomes. A progressive thinning of the septal cross-wall produces an enlargement of the septal aperture sufficient to allow the passage of nuclei. It appears that degradative enzymes are probably carried to the site of septal dissolution in vesicles derived from endoplasmic reticulum in the area of the septal apparatus.
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    URL: http://dx.doi.org/10.1007/BF00590174
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    Ultrastructural aspects of the marine fungusJaponochytrium sp. (1974)
    Springer
    Archives of microbiology 96 (1974), S. 305-317 
    Details
    ISSN: 1432-072X
    Keywords: Marine Fungi ; Ultrastructure ; Multilamellate Sporangial Wall ; Sagenogenetosome ; Zoospore Cleavage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The morphology and ultrastructure of aJaponochytrium sp. has been studied by light, scanning and transmission electron microscopy. The wall has been shown to be multilamellate and persistent. Stages in zoospore cleavage are described and sagenogenetosomes reported in mature sporangia.
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    URL: http://dx.doi.org/10.1007/BF00590186
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    Comparative structural characterization of material extractable from aerial sheath of Streptomyces roseoflavus var. roseofungini (1974)
    Springer
    Archives of microbiology 101 (1974), S. 71-82 
    Details
    ISSN: 1432-072X
    Keywords: Streptomycetes ; Ultrastructure ; Surface Sheath
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 1. Tubular-like structures were regularly revealed in the surface sheath of the aerial mycelium of the parent strain of Streptomycetes roseoflavus var. roseofungini. In their shape and dimensions these structures were highly reminiscent of those massive accumulation of which was earlier reported to occur in cultures of dedifferentiated nocardioform “fructose” mutant of the same parent strain. 2. The tubular-like structures of the aerial mycelium sheath were shown to be markedly susceptible to brief acetone washing, undergoing almost complete desintegration. 3. On addition of water to crude acetone extract of the aerial mycelium precipitation and possible selfassembly of a spectrum of various structures occurred (folded scaly, bubble-like, spout-like). Some among structures so produced were reminiscent of those found in spectra of structures observed in reconstruction experiments with tubules from the mutant as well as of structures found in the aerial sheath of the parent strain and some other actinomycetes. Similarity in subunit structure of above materials was also noticeable. The presence, in the sheath of aerial mycelium, of material with a tendency to selforganization is discussed in relation to the possible involvement of selfassembly processes in the formation of the surface sheath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455926
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    The rotifer trap of Zoophagus (1974)
    Springer
    Archives of microbiology 101 (1974), S. 95-107 
    Details
    ISSN: 1432-072X
    Keywords: Zoophagus insidians Rotifer ; Predacious Fungi ; Oomycetes ; Glue Secretion ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The predacious watermold Zoophagus insidians traps loricate rotifers on short, lateral branches of the main, hyphal axis. These branches or “traps” are packed at their distal ends with a number of vesicles filled with an electron-dense matrix. Electron micrographs of the mycelium disclose a two-layered wall; the outer layer is electron dense and the inner, electron transparent. The outer dense layer on the tip of the “trap” is organized into a number of fine ridges and occasional discontinuities. Thin sections through recently trapped rotifers indicate that the cilia of the animals are stuck to the trap by a glue. This adhesive is derived from secretion of the matrix of the vesicles aggregated in the tip of the trap. The secretion mechanism is triggered by the animal and is accompanied by: 1. The separation of the two layers of the wall, 2. fusion of the vesicles with the cell membrane and 3. extrusion of the glue through pits in the tip of the inner wall of the “trap”. After snaring a rotifer, the previously arrested branch grows as a haustorium into the body cavity of the animal. The host tissues disintegrate within a few hours and appear to be the main nutrient source of the fungus.
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    URL: http://dx.doi.org/10.1007/BF00455929
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    Ultrastructural aspects of localized membrane damage in Spirillum serpens VHL early in its association with Bdellovibrio bacteriovorus 109D (1974)
    Springer
    Archives of microbiology 100 (1974), S. 179-195 
    Details
    ISSN: 1432-072X
    Keywords: Bdellovibrio bacteriovorus ; Spirillum serpens ; Freeze Fracture ; Electron Microscopy ; Ultrastructure ; Membrane Damage ; Organismic Associations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The freeze-fracture technique and electron microscopy have been used to demonstrate that localized damage is inflicted upon the cytoplasmic membrane of Spirillum serpens VHL within 20 to 30 min after the start of its association with Bdellovibrio bacteriovorus 109D. This damage is not observed in uninfected Spirillum cells, nor in infected cells within the first 10 min. This damage takes the form of a “blister” which, when viewed stereoscopically in electron micrographs, is seen to project toward the interior of the Spirillum cell. Shortly after its formation, the blister becomes elaborated into a series of ridges which may assume forms ranging from an elaborate spiral to a series of loops or knots. The formation of a blister is shown to involve both the inner and outer leaves of the membrane bilayer, and evidence is presented to indicate that the blister site corresponds to the site of attachment of the Bdellovibrio cell. The hypothesis is proposed that this ultrastructural damage is the cytological basis for the controlled and localized leakage through the cytoplasmic membrane into the periplasmic space of the Spirillum cell at locations adjacent to the Bdellovibrio cell. It is suggested that this localized membrane damage may be the ultrastructural basis for the high efficiency with which bdellowvibrios are known to incorporate cytoplasmic materials from the other bacteria in whose periplasmic spaces they develop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446316
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    The presence of unusual microtubular structures in senescent cells of Chlamydomonas dysosmos (1974)
    Springer
    Archives of microbiology 98 (1974), S. 199-206 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Chlamydomonas ; Senescent ; Microtubules ; Complexes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Complexes of twisted ribbons composed of ordered arrays of microtubules are identified in close association with the plasmalemma and the surfaces of some organelles in senescent cells of photoheterotrophically cultured Chlamydomonas dysosmos. The ribbon complexes occur throughout the cytoplasm, and do not appear related to the flagellar insertions. The component microtubules are approximately 26 nm in width, exhibiting a center-to-center spacing of about 44 nm. Additional cytoplasmic microtubules are often closely related to the tubular complexes. A detailed description of their fine structure is presented here which tends to support the ascribed function of microtubules in maintaining the structural integrity of the protoplasm.
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    URL: http://dx.doi.org/10.1007/BF00425282
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    Cell wall formation in zoospores of Allomyces arbuscula (1974)
    Springer
    Archives of microbiology 98 (1974), S. 147-158 
    Details
    ISSN: 1432-072X
    Keywords: Allomyces ; Zoospores ; Cell Wall ; Wall Formation ; Lomasome ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ultrastructural observations on encysting haploid zoospores of Allomyces arbuscula are presented with special reference to cell wall deposition. Multivesicular bodies are observed in the cytoplasm of zoospores 15 min after inoculation, lomasomes after 30 min and fine membrane profiles between the plasmalemma and the cyst wall are observed after 4 h indicating a possible system for secretion of cell wall components.
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    URL: http://dx.doi.org/10.1007/BF00425277
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    Concordance between morphological and biochemical estimates of fluid spaces in rat brain cortex slices (1974)
    Springer
    Experimental brain research 21 (1974), S. 299-314 
    Details
    ISSN: 1432-1106
    Keywords: Brain cortex slices ; Ultrastructure ; Fluid spaces ; Swelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A comparison was made between morphological and biochemical estimates of extracellular and intracellular fluid spaces in rat brain cortex slices incubated under different conditions. By light microscopy the periphery of the slices was found to be more swollen than the center; this regional difference was verified biochemically in unfixed tissue. The electronmicroscopic evaluation of intra- and extracellular fluid spaces was accordingly based upon findings in a preselected area. Due to intracellular penetration of inulin in rat brain cortex slices the biochemically, determined extracellular and intracellular spaces were obtained by compartmental analysis of the inulin space. The concordance between the biochemical and the morphological findings was good: Both methods showed that the extracellular space increased during the incubation to a considerable magnitude after one hr. and that this extracellular space was reduced by excess potassium, glutamate, anoxia or incubation at 0°. Under the same conditions the biochemically determined intracellular space was increased. This cellular swelling was confirmed morphologically and found to comprise mainly glia cells after exposure to excess potassium, predominantly neurons after incubation at 0° and both cell types after anoxia or addition of glutamate.
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    URL: http://dx.doi.org/10.1007/BF00235749
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    Ultrastructural changes in the smooth musculature of antrum and pylorus in presence of ulcus ventriculi (1974)
    Springer
    Research in experimental medicine 164 (1974), S. 1-17 
    Details
    ISSN: 1433-8580
    Keywords: Pathology ; Ultrastructure ; Smooth muscle ; Ulcus ventriculi ; Pathologie ; Ultrastruktur ; Glatte Muskulatur ; Ulcus ventriculi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurde die glatte Muskulatur des Antrum ventriculi sowie des Pylorus von 7 Patienten mit einem oder mehreren Ulcera ventriculi untersucht. Vergleichsweise konnten die entsprechenden Regionen des Magens von 5 normalen Organspendern der elektronenmikroskopischen Präparation zugeführt werden. Elektronenoptisch faßbare Veränderungen fanden sich noch 180 mm von der Ulcusläsion entfernt an den glatten Muskelzellen der inneren Rings- und der äußeren Längsmuskulatur sowie an den Gefäßen. Eine regelmäßig anzutreffende Veränderung der glatten Muskelzellen des Antrum und des Pylorus besteht in einer Strukturverdichtung des Kerns, der sarkoplasmatischen Grundsubstanz und der Myofilamente, kombiniert mit einer Vermehrung und Vergrößerung der hypolemmalen Vesikel, wie der dense bodies. Die Befunde werden als Ausdruck einer starken isometrischen Kontraktion der glatten Muskulatur im Antrum und im Pylorus bei Ulcera ventriculi gedeutet. Die geschilderten Befunde ließen sich an normalem Untersuchungsmaterial nicht erheben. Neben für das Magenulcus unspezifischen pathologischen Befunden an den glatten Muskelzellen, wie Anhäufung von Lipofuscin im Endoplasmahof und Lyse der Myofilamente, konnten spezifische Veränderungen gefunden werden. Diese betreffen die nur im Endoplasmahof differenzierten Räume des endoplasmatischen Reticulums. Bei zahlreichen Muskelzellen der Rings- und Längsmuskelschicht kommt eine extrem starke Quellung des endoplasmatischen Reticulums zur Beobachtung. Die Vacuolisation der endoplasmatischen Räume führt zu einer Verdrängung der übrigen Zellorganellen sowie der Myofilamente. Die Capillarendothelzellen weisen degenerative Veränderungen auf, die zu einem Sistieren cytopemptischer Vorgänge führen. In der arteriolären Gefäßstrecke findet sich vielfach eine starke Kontraktion der glatten Muskulatur bis zum völligen Verschluß der Gefäßlichtung. Auch diese Befunde ließen sich nur an den Mägen mit Ulcera ventriculi, nicht dagegen an dem normalen Vergleichsmaterial erheben.
    Notes: Summary The smooth musculature of antrum and pylorus of 7 patients with one or more stomach ulcers was examined by transmission electron microscopy. Corresponding regions of the stomachs of 5 normal organ donors served as control material. Electronmicroscopically visualizable changes were found at distances of up to 180 mm from the site of ulcerous lesion on the smooth muscle cells of the inner circular and outer longitudinal musculature, also on the blood vessels. A regularly occurring modification of the smooth muscle cells of antrum and pylorus consists of a structural condensation of the nucleus, of the sarcoplasmic ground substance and of the myofilaments, combined with augmentation and distension of the hypolemmal vesicles and of the dense bodies. These findings are interpreted as expression of a pronounced isometric contraction of the smooth musculature in the antrum and pylorus in presence of ulcera ventriculi. Such findings are not obtainable on normal material. Besides pathological modifications at the smooth muscle cells which are unspecific for stomach ulcer, such as accumulation of lipofuscin in the endoplasmatic lacunae and lysis of the myofilaments, specific changes were observed. These concern the interstices of the endoplasmic reticulum to be found only in the endoplasmatic lacunae. In numerous muscle cells of the circular and longitudinal muscle layers an extremely marked distension of the endoplasmic reticulum is found. Vacuolization of the endoplasmic cisternae causes displacement of the other cell organelles and of the myofilaments. The capillary endothelial cells show degenerative changes which bring about arrest of cytopemptic processes. In the arteriolar regions a strong contraction of the smooth musculature, at times resulting in complete occlusion of the vasal lumen, is frequently found. These findings, too, are obtainable only on stomachs with ulcera ventriculi and not on normal control material.
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    URL: http://dx.doi.org/10.1007/BF01851960
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    Ultrastruktur des proximalen Nierentubulus nach Behandlung mit einem Pentosanschwefelsäureester (1974)
    Springer
    Research in experimental medicine 164 (1974), S. 19-33 
    Details
    ISSN: 1433-8580
    Keywords: Kidney ; Rat ; Ultrastructure ; Proximal tubule degeneration ; Heparinoid ; Niere ; Ratte ; Ultrastruktur ; Proximale Tubulusdegeneration ; Heparinoid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 24 Std nach i.v. Injektion von 100 mg/kg eines Pentosanschwefelsäureesters (SP 54) sind in der Nierenrinde von Ratten schwere degenerative Veränderungen der proximalen Tubuluszellen zu beobachten. Das Tubulusepithel ist flachkubisch umgewandelt, das Tubuluslumen ist angefüllt mit ausgestoßenen Mitochondrien und anderen Zelltrümmern. Am stärksten betroffen ist die Pars contorta des proximalen Tubulus. Weniger stark veränderte Tubuluszellen sind angefüllt mit Cytosomen, die eine spezifische Feinstruktur haben oder gehäuft gegenüber Kontrollen Cytoplasmaprotrusionen in das Tubuluslumen aufweisen. Die akute Tubulusdegeneration ist ein spezifischer Effekt von SP 54. Heparin bewirkt nur eine leichte Schwellung des Tubulusepithels, die häufiger auftritt als bei Kontrolltieren.
    Notes: Summary 24 hrs after the intravenous injection of 100 mg/kg of a Pentosansulfuricacidester (SP 54) severe degenerative alterations are observed in the proximal tubular cells in rat kidney cortex. The tubular epithelium has changed to a single layer of elongated cubic cells. The tubular lumen is filled with cellular debris and extruded mitochondria. The greatest change is seen in the pars contorta of the proximal tubule. Less degenerated tubular cells have a great number of cytosomes with a specific substructure or have cytoplasmatic protrusions into the tubular lumen. This acute tubular degeneration is a specific event after the administration of SP 54 and is not seen after an equimolar dosis of Heparin. Heparin induces only a slight swelling of the tubular epithelium, more frequent seen as in the control animals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851961
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    Electronic Resource
    Structure and function of cold receptors (1974)
    Springer
    Pflügers Archiv 352 (1974), S. 1-10 
    Details
    ISSN: 1432-2013
    Keywords: Thermoreceptors ; Cold Receptor ; Ultrastructure ; Receptor Morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Afferent impulses were recorded from single fibers serving cold and warm receptors in the skin of the cat's nose. The receptors were carefully tested for specificity and the receptive fields localized under the microscope with a microthermode. Each single fiber served one spot-like receptive field. The field was marked without damaging the nerve ending by inserting two thin stainless steel wires into the skin on both sides of the receptor. Investigation of semithin and ultrathin serial sections by light and electron microscopy revealed beneath each cold spot a dermal papilla which contained a single small myelinated fiber dividing into a number of unmyelinated terminals. Near the epidermis the receptor branches leave their Schwann cell envelope, penetrate the basal lamina of the epithelium, and their tips are invaginated into the cytoplasm of the basal epithelial cells. The basal lamina of the epithelium fuses with that of the receptor axon. The receptor axons contain numerous mitochondria, glycogen particles and a filamentous receptor matrix with vesicles of various sizes. The described structures were absent beneath the warm spots. In addition to the cold receptors, Merkel cell neurite complexes and lamellated encapsulated endings were found that are known to be mechanoreceptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061945
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  • 37
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    A fine structural study on the extracellular activity of alkaline phosphatase and its role in calcification (1974)
    Springer
    Calcified tissue international 15 (1974), S. 201-212 
    Details
    ISSN: 1432-0827
    Keywords: Ultrastructure ; Alkaline Phosphatase ; Calcification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Des cals expérimentaux de neuf jours, formés au niveau de radius de jeunes rats, sont traités par la méthode calcium-cobalt de Gomori (1939) pour la mise en évidence ultrastructurale de la phosphatase alcaline afin d'étudier son rôle éventuel dans le dépôt du calcium. L'activité enzymatique apparait initialement sous forme de précipités globulaires en dehors de la membrane cellulaire de jeunes chondroblastes hypertrophiques. Ce précipité donne ensuite naissance à des corps sphériques de phosphatase alcaline qui se forme près de la cellule. Ces corps sphériques s'observent dans une zone intermédiaire plus éloignée. Une formation de cristaux en aiguilles (apparemment une calcification) se développe dans des corps isolés ou agrégés, laissant voir nettement leurs limites, même lorsque la calcification est plus avancée au point qu'on ne peut plus distinguer des cristaux individuels. Au niveau des coupes témoins, traitées de façon identique mais sans substrat ou avec de l'E.D.T.A., on n'observe ni précipité enzymatique ou corps sphériques. L'aspect des dépôts cristallins dans des corps qui contiennent de la phosphatase alcaline ne peut s'expliquer que par l'existence d'une association étroite entre enzymes et calcification.
    Abstract: Zusammenfassung Neun Tage alter experimenteller Kallus an Radii von jungen Ratten wurde mit Gomori's (1939) Calcium-Kobalt Methode untersucht, um die Verteilung der alkalischen Phosphatase und ihre Beziehung zur Calciumablagerung ultrastrukturell zu demonstrieren. Enzymaktivität zeigte sich zuerst als globulares Präzipitat außerhalb der Zellmembran von Knorpelzellen im Beginn der Hypertrophie. Aus dieser Präzipitatschicht entstanden dann gerundete Körperchen, die sich von der Zelle abtrennten. Solche Körperchen wurden auch in größerer Entfernung von der Zelle beobachtet, d.h. in einer Zwischenzone zwischen benachbarten Zellen. Nadelförmige Kristalle, wahrscheinlich von Calcium-Salzen, wurden in einzelnen oder aggregierten Körperchen beobachtet. Die äußere Zone der Körperchen blieb jedoch deutlich sichtbar, selbst dann, wenn der Calciumgehalt derart zugenommen hatte, daß einzelne Kristalle nicht länger erkennbar waren. In Kontrollen, die in gleicher Weise behandelt waren, aber ohne Substrat oder mit Zufügung von EDTA, wurden weder Präzipitate noch Körperchen beobachtet. Das Auftreten von Calciumablagerungen in alkalischer Phosphatase enthaltenden Körperchen scheint kaum anders erklärbar als durch eine enge funktionelle Verbindung zwischen Enzym und Calciumablagerung.
    Notes: Abstract Nine day old experimental calluses in radii of young rats were treated with Gomori's (1939) calcium-cobalt method to demonstrate ultrastructurally the presence of alkaline phosphatase in a search for its possible role in the desposition of calcium. Enzyme activity first appeared as globule-like precipitates outside the cell membrane of early hypertrophic cartilage cells. This precipitate layer then seemed to give rise to spherical bodies of alkaline phosphatase which occur at a slight distance from the cell. The spherical bodies were also observed further away from the cell in an intermediate zone between neighboring cells. Needle-like crystal formation, apparently calcification, occurred inside single or aggregated bodies, leaving their peripheral rim clearly visible, even when calcification had increased to such an extent that individual crystals could no longer be recognised. In controls, treated in the same way but without substrate, or with EDTA, no enzyme precipitate or spherical bodies were seen. The appearance of crystalline deposits in bodies which contain alkaline phosphatase seems difficult to explain on any other basis than that there is a close functional association between the enzyme and calcification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059057
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  • 38
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    Fenfluramine-induced ultrastructural alterations in tissues of rats and guinea pigs (1974)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 285 (1974), S. 175-184 
    Details
    ISSN: 1432-1912
    Keywords: Fenfluramine ; Rat ; Guinea Pig ; Phospholipidosis, drug-induced ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary After administration of the anorectic drug fenfluramine (40 mg/kg per day) to rats (s. c. or i. p.) and guinea pigs (p.o.) over periods of 2 to 11 weeks, electron microscopic examination was performed on lungs, liver, lymphatic tissues and peripheral blood of both species, and on adrenal glands and ovaries of rats. In rats, fenfluramine caused the following alterations (listed according to the duration of treatment): Formation of abnormal lamellated inclusions in lymphocytes and plasma cells of lymphatic tissues, appearance of “foam cells” in lung alveoli; formation of abnormal lamellated inclusions in corpus luteum, lymphocytes of peripheral blood, and in adrenal cortex. In guinea pigs, the same alterations were found in lymphocytes of spleen and peripheral blood, in hepatocytes and in lung. The present observations support the concept of a generalized phospholipidosis induced by amphiphilic compounds. The potency of fenfluramine to induce a lipidosis is, however, considerably less pronounced than that previously demonstrated for the anorectic drug chlorphentermine. This difference is suggested to be due mainly to the lower degree of amphiphilia of fenfluramine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00501152
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  • 39
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    Lipidosis-like ultrastructural alterations in rat lymph nodes after treatment with tricyclic antidepressants or neuroleptics (1974)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 286 (1974), S. 165-179 
    Details
    ISSN: 1432-1912
    Keywords: Lipidosis ; Antidepressants ; Neuroleptics ; Lymphocytes ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Lymphocytes of rat lymph nodes have previously been revealed as reliable and sensitive indicators of a particular drug side effect, notably a generalized phospholipidosis, inducible by a compound of amphiphilic character (chlorphentermine). The purpose of the present study was to examine the effects of other amphiphilic compounds upon rat lymphocytes. After oral administration of various tricyclic antidepressants (iprindole, imipramine, clomipramine, 1-chloro-amitriptyline, 1-chloro-10,11-dehydro-amitriptyline, noxiptiline, amitriptyline), or of two neuroleptic drugs (chlorpromazine, thioridazine) to rats, the popliteal lymph nodes were examined with the electron microscope. After a single application of either iprindole (50 mg/kg), imipramine (100 mg/kg), or clomipramine (150 mg/kg) small proportions of lymphocytes were found to contain abnormal lamellated cytoplasmic inclusions. The size and number of inclusions and the number of affected lymphocytes increased with further treatment. Similar observations were made after treatment with the chlorinated amitriptyline derivatives. On the other hand, only small numbers of lymphocytes were affected by noxiptiline, amitriptyline, chlorpromazine and thioridazine, even after prolonged treatments (up to 13 weeks) with high doses (up to 125–175 mg/kg). The present ultrastructural finding are interpreted as representing lipidosislike cellular alterations, yet of highly varying degrees. The large quantitative differences are tentatively suggested to be due to differences in the rate and mode of metabolism of the drugs, and due to differing degrees of amphiphilia of the compounds applied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00501610
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  • 40
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    Über das elektrochemische Verhalten der Eisen-Chrom-Legierungen GX40Cr30 und GX120Cr30 in sulfat- und chloridhaltigen Elektrolyten (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 32-39 
    Details
    ISSN: 0947-5117
    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: Electrochemical behaviour of iron-chromium alloys GX 40 Cr 30 and GX 120 Cr 30 in sulfate and chloride containing electrolytesWhen iron-chromium alloys of the types given above are exposed to 1 N sulfuric acid the grain faces are attaqued, and this attack depends from the previous thermal treatment. The result obtained show, however, that the measurement method has a pronounced effect, too. With potentiodynamic polarisation a second maximum is found in the current density/potential curves; this second maximum is not connected with an intercrystalline corrosion and is not found when the experiments are made in quasistationary conditions with fresh electrodes. In chloride containing electrolytes potentiodynamic polarisation gives rise to pitting corrosion while under stationary conditions a grain face corrosion starting from the phase boundaries is observed.
    Notes: Werden Eisen-Chrom-Legierungen der oben genannten Arten der Einwirkung von 1 n Schwefelsäure ausgesetzt, so werden die Kornflächen angegriffen; das Ausmaß des Angriffs ist dabei abhängig von der vorherigen Wärmebehandlung. Die erhaltenen Ergebnisse zeigen indessen, daß auch die verwendete Meßmethode eine ausgeprägte Wirkung besitzt. Bei potentiodynamischer Polarisation finder man in den Stromdichte-Potential-Kurven ein zweites Maximum, das nicht mit interkristalliner Korrosion verbunden ist und nicht auftritt, wenn bei den Versuchen quasistationär, mit jeweils frischen Elektroden gearbeitet wird. In chloridhaltigen Lösungen führt die potentiodynamische Polarisation zu Lochfraß, während unter stationären Bedingungen Kornflächenkorrosion, ausgehend von den Phasengrenzen, beobachtet wird.
    Additional Material: 25 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250105
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    Aus Industrie und Technik (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 46-46 
    Details
    ISSN: 0947-5117
    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/maco.19740250107
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  • 42
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    Umschau (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 47-47 
    Details
    ISSN: 0947-5117
    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/maco.19740250108
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  • 43
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    Überzüge organischer Natur (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 76-79 
    Details
    ISSN: 0947-5117
    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/maco.19740250118
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    Grundlagen metallischer Werkstoffe, Korrosion und Korrosionsschutz. Autorenkollektiv. 150 S., 90 Abb., 13 Tab. und 17 Anlagen (1973). VEB Deutscher Verlag für Grundstoffindustrie, Leipzig. Brosch.: 9,- DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 80-80 
    Details
    ISSN: 0947-5117
    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/maco.19740250119
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  • 45
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    Personalnachrichten (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 80-80 
    Details
    ISSN: 0947-5117
    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/maco.19740250120
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  • 46
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    Kurzreferate zu den Originalarbeiten (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. I 
    Details
    ISSN: 0947-5117
    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/maco.19740250121
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  • 47
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    Masthead (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974) 
    Details
    ISSN: 0947-5117
    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/maco.19740250201
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    Dr.-Ing. Dr.-Ing. E. h. Hellmut Ley (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. XIII 
    Details
    ISSN: 0947-5117
    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/maco.19740250202
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    Observations Regarding Stress Corrosion Phenomena in an Austeno-ferritic Stainless SteelVortrag, gehalten auf der 17. ACHEMA 1973, 20. bis 27. Juli 1973 in Frankfurt a. M. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 81-85 
    Details
    ISSN: 0947-5117
    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: Beobachtungen zur Spannungsrißkorrosion in austenitisch-ferritischen nichtrostenden StählenStähle mit austenitisch-ferritischem Gefüge besitzen sowohl im geschweißten als auch im ungeschweißten Zustand hohe Beständig keit gegen Spannungsrißkorrosion. Bei Laboratoriumsversuchen-Calciumchloridlösung bei 100 °C, mit und ohne anodische Polarisation sowie chloridhaltige Medien bei 225 °C- war es nicht möglich, Ri°bildung zu erzeugen. Die Ri°bildung im geschweißten Zustand, die in Ausnahmefällen auftreten kann, läßt sich unterdrücken durch Verwendung von Elektroden, die ein Schweißgefüge der gleichen Zusammensetzung wie der Grundwerkstoff ergeben.
    Notes: Steels having austeno-ferritic structure are highly resistant to stress corrosion cracking in the welded as well in the nonwelded condition. It has not been possible in laboratory experiments-calcium chloride solution at 100 °C, with and without anodic polarisation, and chloride containing media at 225 °C - to produce cracking. Crack formation which in exceptional cases may occur in the welded condition may be suppressed by the use of electrodes yielding a weld seam having the same composition as the base material.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250203
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  • 50
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    Einfluß des Metallsubgefüges auf den anodischen Auflösungsmechanismus von Eisen (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 86-92 
    Details
    ISSN: 0947-5117
    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 metal substructure on the anodic dissolution mecanism of ironThe electrochemical behaviour of iron shows a pronounced dependence on the metal substructure. The surfaces formed at the rupture of the specimens are dissolved according to a non-catalytic mecanism while a heat treatment of these rupture surfaces produces a change in the mechanism so that the dissolution occurs according to a catalytic mechanism. The two mechanisms are characterized by a rather different dissolution potentials; these differences can be attributed to the state of deformation of the crystal latice.
    Notes: Das elektrochemische Verhalten von Eisen ist in ausgeprägtem Maße vom Metallsubgefüge abhängig. Die beim Bruch der Proben entstandenen Flächen werden nach einem nichtkatalytischen Mechanismus aufgelöst während eine Wärmebehandlung dieser Bruch-flächen zu einer Anderung des Mechanismus führt und die Auflösung dann katalytisch erfolgt. Die beiden Mechanismen sind durch stark unterschiedliche Auflösungspotentiale charakterisiert; diese Unterschiede können dem Verzerrungszustand des Kristallgitters zugeschrieben werden.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250204
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    Metallstatistik 1962-1972. Herausgegeben von der Metallgesellschaft AG, Frankfurt a. M. 1973. 328 S. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 159-160 
    Details
    ISSN: 0947-5117
    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/maco.19740250224
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    Das lustige Atom. Von F. Wolf. 4. erg. und erw. Auflage; 224 S., 140 Abb., Format 14 × 16 mm; Vulkan-Verlag Dr. W. Classen, Essen 1973. Linson, 19,60 DM. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 160-160 
    Details
    ISSN: 0947-5117
    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/maco.19740250225
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  • 53
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    DIN-Taschenbuch 12: Wasserversorgungs-Normen. Herausgegeben vom Deutschen Normenausschuß (DNA), Berlin 30, Köln und Frankfurt (Main): Beuth-Vertrieb GmbH. 3. geänderte Auflage 1973. 364 S. DIN A 5. Brosch. 60,- DM. Sonderpreis für Schulen 39,- DM. ISBN 34 10-10428-3. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 160-160 
    Details
    ISSN: 0947-5117
    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/maco.19740250226
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  • 54
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    Mathematik für Naturwissenschaftler und Ingenieure. Band 1. Von A. Jeffrey. Nach der englischen Originalausgabe „Mathematics for Engineers and Scientists“ übersetzt von R. Janoschek. VIII, 385 S. mit 86 Abb. und 18 Tab. Verlag Chemie GmbH, Weinheim/Berg- str. 1973. Brosch. 39,- DM. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 160-160 
    Details
    ISSN: 0947-5117
    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/maco.19740250227
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  • 55
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    Kurzreferate zu den Originalarbeiten (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. VII 
    Details
    ISSN: 0947-5117
    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/maco.19740250229
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    Lehrbuch der anorganischen Chemie. Von Holleman-Wiberg. 71.-80., völlig umgearb. und stark erw. Auflage. XXXII/1209 S., 216 Abb., 37 Bilder, Verlag Walter de Gruyter u. Co., Berlin 30, 1971. Ganzln. 58,- DM. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 160-160 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250228
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    Masthead (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974) 
    Details
    ISSN: 0947-5117
    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/maco.19740250301
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    Corrosion in Aqueous Solutions and Corrosion in Gases at Elevated Temperatures - analogies and disparitiesPlenary lecture at the 5th European Conference of Corrosion, Paris, 24th September 1973. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 161-165 
    Details
    ISSN: 0947-5117
    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: Korrosion in wäßrigen Lösungen und in Gasen hoher Temperatur - Analogien und DisparitätenAuf Grundlage einige Beispiele der Korrosion in den beiden obengenannten Medien wird gezeigt, daß man sowohl für wäßrige Lösungen als auch für heiße Gase und Salzschmelzen elektrochemische Korrosionsmechanismen definieren kann. In zahlreichen Korrosionsfällen zeigt sich nämlich die Wirkung von Lokalelementen. Aufgrund dieser Erkenntnisse ist man in der Lage. Parallelen zwischen der Oxidation bei hoher Temperature und der Passivierung in Lösungen zu ziehen. Disparitäten bestehen jedoch hinsichtlich der Kinetik dieser Prozesse, denn die Reaktionsgeschwindigkeit kann durch verschiedene Vorgänge kontrolliert werden. Analogien findet man ebenso im Falle der Inhibierung, denn manche anorganischen Stoffe besitzen auch bei ziemlich hohen Temperaturen inhibierende Wirkungen. Die untersuchten Analogien und Disparitäten beschränken sich nicht auf reine Metalle, sondern sind auch anwendbar auf Legierungen, wo man gewisse Analogien feststellen kann, z. B. hinsichtlich der Verzunderungsbeständigkeit und der Säurebeständigkeit legierter Stähle.
    Notes: On the basis of some examples of corrosion in the two media mentioned above the author shows that electrochemical mechanisms of corrosion can be postulated with aqueous solutions as well as with hot gases and salt melts. In quite a number of corrosions the action of local cells comes to bear. On the basis of these data it is possible to define analogies between high temperature oxidation and passivation in solutions. Disparities exist, however, with respect to the kinetics of these processes because the rate can be controlled by very different reactions. Analogies are equally found in the case of inhibition where certain inorganic substances act as inhibitors even at rather high temperatures. The analogies and disparities considered here, are not restricted to pure metals but are equally applicable to alloys where it is possible to find analogies e.g. in the case of the scaling and acid resistance of alloyed steels.
    Additional Material: 9 Ill.
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    Some Aspects of the Influence of Manganese in Austenitic Stainless Steels (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 172-174 
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    ISSN: 0947-5117
    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: Einige Aspekte des Einflusses von Mangan in austenitischen nichtrostenden StählenDer Einfluß von Mangan auf die Lochfraßbeständigkeit der18 8-Stähle beruht auf seiner Neigung zur Bildung von Sulfiden, die dann als nichtmetallische Einschlüsse vorliegen. Wie die Verfasser zeigen, führt die Verringerung des Mangangehalts dieser Stähle (1,8%) auf Werte um 0,2% zu einer beträchtlichen Verbesserung des Korrosionsverhaltens. Das Lochfraßpotential verschiebt sich dann nach beträchtlich höheren Werten, ohne daß die Schweißbarkeit beeinträchtigt oder der Ferritgehalt im Guß-oder Walzzustanderhöht würde.
    Notes: The effect of Mn on the pitting corrosion resistance of 18 8 steels is due to its sulphide forming ability, because the sulphides are then present as non-metallic inclusions. As is shown by the authors that reduction of the manganese content of these steels (from normally 1.8% to values around 0.2) gives rise to a considerable improvement of the corrosion behaviour. The pitting potential is then displaced toward considerably higher values while no negative aspect is noted on a weldability and no increase of the ferrite content in the ascast and as-rolled conditions is experienced.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19740250304
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    Neuere Untersuchungen mit der Kurzzeit-Korrosionsprüfungsmethode von Machu-Schiffman über anorganische und organische Überzüge auf Stahl, verzinktem Stahl und Aluminium (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 179-181 
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    ISSN: 0947-5117
    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: Recent investigations into inorganic and organic coatings on steel, galvanized steel and aluminium, using an accelerated cor- rosion test according to Machu-SchiffmanThe method constitutes the improvement with respect to the salt spray method. It is based on a weakly acid solution i. e. specifically 5% NaCl solution with addition of a small quantity of hydrogen peroxide. This solution is used for immersion tests and, as to aggressivity, is comparable to industrial and marine atmospheres; the duration of the test, however, is considerably reduced (about I5 hours). A typical and optimum composition is 50 g/l NaCl, 10 millglacial acetic acid and 5 81130% HzOz, pH = 3.0. In the case of galvanized steel or zinc it is of advantage to use a solution containing 50 g/l NaCl and 10 mlJl30% HzOz. pH = 6.0. As to alumini- um both solutions can be used, depending on the aggressivity to be simulated. Duration of immersion of 16 hours at 23 OC in the solu- tion of pH 3.0 would correspond in the case of coated aluminium to 336 hours exposure to salt spray.
    Notes: Die Methode stellt gegenüber der Salzprüfung eine Verbesserung dar; man arbeitet mit einem schwachsauren Medium, nämlich einer Lösung von 5% NaCl mit einer geringen Menge Wasserstoffsuperoxid. Diese Lösung wird im Tauchversuch eingesetzt und ist hinsichtlich ihrer Aggressivität vergleichbar mit Industrie- und Meeresatmosphäre, wobei die Versuchsdauer ziemlich stark verkürzt ist (etwa 15 Stunden). Die optimale typische Zusammensetzung ist 50 g/l NaCl, 10 ml/1 Eisessig, 5 g/l 30%iges Wasserstoffsuperoxid, pH = 3,0. Im Falle von verzinktem Stahl oder Zink verwendet man vorteilhafterweise eine Lösung aus 50 g/l NaCl und 10 ml/l 30%iges Wasserstoffsuperoxid (pH = 6.0). Bezüglich Aluminium können je nach der zu simulierenden Aggressivität beide Lösungen verwendet werden. Im Falle von beschichtetem Aluminium entspricht eine Tauchdauer von 16 Stunden bei 23°C in der Lösung mit pH 3,0 einem Salzsprühnebelversuch von336 Std. Dauer.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19740250306
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    Aufbau und Eigenschaften thermisch gespritzter Auskleidungen aus SondermetallenVortrag, gehalten auf der 17. ACHEMA 1973, 20.-27. Juni 1973 in Frankfurt a. M. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 166-171 
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    ISSN: 0947-5117
    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: Structure and properties of special metal coatings applied by thermal sprayingThermal spraying of metals of groups IVa, Va and VI a is difficult because of the fast oxidation of these metals (Ti, Zr, Ta, Nb, W, Mo). It is consequently of vital importance that the atmosphere be oxygen-free, it is that the spray process is carried in an inert atmosphere. In view of the high cost involved in such a system it is necessary to provide for recirculation of an inert gas. The coatings obtained in pure argon are characterized by very high adhesion strength which is due to diffusion phenomena at the base metal/coating interphase. This diffusion takes place at high velocities and the thickness of the diffusion layer depends from the state of perturbation of the superficial zone of the base metal (e. g. perturbation due to sand blasting) and of the perturbation of the atomic structure of the liquid particles at the high temperature. Titanium coatings thus obtained are completely free from inclusions when obrained in argon, while they are severly embrittled when applied under nitrogen. The properties of coatings from all the metals considered (Ti, Zr, Mo, Nb, Ti6A14V) are perfectly comparable to those of the solid metals.
    Notes: Thermisches Spritzen von Metallen der Gruppen 1 Va, Va und VIa ist wegen der leichten Oxidierbarkeit dieser Metalle (Ti, Zr, Ta, Nb, W und Mo) schwierig. Infolgedessen muß die Atmosphäre sauerstoffrei sein, d. h. man muß in inerter Atmosphäre spritzen. Da hierbei die Kosten ziemlich hoch liegen, muß das Schutzgas in Umlauf geführt werden. Die beim Spritzen in reinem Argon erhaltenen Überzüge besitzen sehr hohe Haftfestigkeit, da es zwischen Grundmetall und Überzug zu Diffusionsvorgängen in der Grenzschicht kommt. Diese Diffusion erfolgt mit sehr hoher Geschwindigkeit; die Dicke der Diffusionsschicht ist abhängig vom Störungszustand der Oberflächenzone des Grundmetalls (Störungen hervorgerufen durch Sandstrahlen z. B.) und von der Störung tur der flüssigen Metallteilchen infolge der hohen Temperatur. Die nach den Schutzgas- verfahren erhaltenen Titanüberzüge sind beim Spritzen in Argon vollkommen frei von Ein- flü,ssen, wahrend beim Spritzen unter Stickstoff starke Versprödung auftritt. Bei allen verwendeten Metallen (Ti, Zr, Mo, Nb, Ti6AI4 V) sind die Überzüge mit den massiven Metal- len vergleichbar.
    Additional Material: 15 Ill.
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    Aus Industrie und Technik (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 190-192 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250308
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    Umschau (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 193-194 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250309
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    Patentschau (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 276-287 
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    ISSN: 0947-5117
    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/maco.19740250408
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    Zur Oxidschicht von Aluminium (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 325-326 
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    ISSN: 0947-5117
    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: The oxide layer of aluminiumThe oxide layer formed by the atmospheric oxidation of aluminium contains rather different oxides, namely AlO, Al2O2 and Al2O3. The presence of these suboxides and for their mixed crystals is responsible for the adhesion of the oxide layers to the metal because the suboxides are still able by their residual valancy electrons to react with a metal. It is consequently advisable to carry out chemical treatments in such a way as to yield suboxides, too.
    Notes: Die bei der atmosphärischen Oxidation von Aluminium entstehende Oxidschicht enthält ziemlich verschiedene Oxide, und zwar AlO, Al2o2und Al2O3. Die Anwesenheit dieser Suboxide und ihrer Mischkristalle ist ursächlich für die Haftung der Oxidschichten am Metall, da diese Suboxide noch fähig sind, mit ihren restlichen Valenzelektronen mit dem Metall zu reagieren. Es ist daher zweckmäßig, wenn bei der chemischen Behandlung von Aluminium die Bildung der Suboxide angestrebt wird.
    Additional Material: 4 Ill.
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    Zur Frage der interkristallinen Korrosionsanfälligkeit von ungenügend stabilisiertem Stahl 1Cr18Ni9Ti (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 330-340 
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    ISSN: 0947-5117
    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: Problem of intercrystalline corrosion susceptibility of an inadequately stabilized steel 1Cr18Ni9TiA study of the relations between carbide precipitation and the corrosion susceptibility has revealed that the steel under study (0.11 % C, 0.42 % Ti) after dissolution treatment is comparable to a non-stabilized steel containing about 0.06% C. Increasing the carbon content gives rise to an ultimate displacement of the sensitivity range to extended durations and lower temperatures of the thermal treatment. From a practical point of view it is, however, permissible to consider thickness without giving rise to the danger of intercrystalline corrosion in moderate oxidants.
    Notes: Die Untersuchung der Beziehungen zwischen der Carbidausscheidung und der Korrosionsanfälligkeit hat gezeigt, daß der untersuchte Stahl (0,11 % C,0,42 % ti) nach Lösungsglühen sich wie ein nicht stabilisierter Stahl mit etwa 0,06 % C verhält. Die Erhöhung des Gehalts an gebundenem Kohlenstoff führt zu einer weiteren Verschiebung des Anfälligkeitsbereiches nach längeren Zeiten und niedrigeren Temperaturen der Wärmebehandlung. Von der Praxis her kann jedoch dieser Stahl als bis zu einer gewissen Dicke schweißbar angesehen werden, ohne daß es in Gegenwart von mäßig starken Oxidationsmitteln zu interkristaliner Korrosion kommt.
    Additional Material: 21 Ill.
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    Nichteisenmetalle (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 398-402 
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    ISSN: 0947-5117
    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
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    URL: http://dx.doi.org/10.1002/maco.19740250514
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    Metallische Überzüge (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 403-405 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250517
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    Organische Werkstoffe (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 403-403 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250516
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    Überzüge organischer Natur (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 406-409 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250519
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    Werkstoffe. (Aufbau und Eigenschaften.) E. Hornbogen. 354 S., 247 Abb. (VII). ISBN 3-540-05885-0 (1973). Springer-Verlag, Berlin-Heidelberg-New York; geheftet: 54,- DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 410-410 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250520
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    Jahrbuch Oberflächentechnik 1974. (Band 30). 416 S., zahlreiche Abb. und Tab. Red.: H.-W. Lieber, G. Oelsner und W. Riedel. Metall Verlag GmbH, Berlin-Kunststoffeinb.: 54,60 DM (einschl. MWSt) (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 410-410 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19740250523
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    Aluminium und Magnesium. (Die metallischen Werkstoffe - Band 15). H. Ginsberg und K. Wefers. 2., erweit. Aufl. 218 S., 84 Abb. und 9 Tab. Ferdinand Enke Verlag, Stuttgart - geheft.: 70,- DM (Ganzln: 76,- DM) (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 410-410 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19740250521
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    Schwingfestigkeit. Federführ.: W. Günther. 408 S., 374 Abb. und 49 Tab. (1974). Best.-Nr.: 540 799 8. VEB Deutscher Verlag für Grundstoffindustrie, Leipzig - Ln.: 60,- DM. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 410-410 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250524
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    Kurzreferate zu den Originalarbeiten (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. XXV 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250525
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    Masthead (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974) 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250601
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    Die Korrosion von Kupfer-Aluminium-Legierungen in schwefelsaurer Beizlösung (1974)
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    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 411-420 
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    ISSN: 0947-5117
    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: Corrosion of copper-aluminium alloys in sulfuric acid containing pickling solutionsWrought copper aluminium alloys (aluminium contents between 5 and 10 weight-%, additions of Fe, Ni and Mn) have been studied by continous and alternating immersion tests in a solution containing 20% H2SO4 and 10% FeSO4 at 40°C. In the as-extruded state the corrosion of monophasic alpha alloys increases with aluminium content. Larger quantities of ß' martensite exercise a negative effect. Addition of 2 weight-% Ni do not improve the corrosion resistance of the alloys with 5 and 8% Al. Cold reduction of alpha alloys give rise to a pronounced intensification of corrosion. No positive effect can be obtained by a thermal treatment of the alloys CuAl 10 Fe 4 Mn Ni and CuAl 10 Fe 4 Ni 5. The corrosion takes place under the following forms: uniform corrosion (CuAl 5), preferred corrosion of grain boundaries (CuAl*, Cual 9, Mn 2 FeNi and CuAl 10 Fe 4 Ni 5 after thermal treatment) and dealuminisation (CuAl 10 Fe 4 Mn 3 Ni). With a view to corrosion resistance the alloys CuAl 5, CuAl8 CuAl 9 Mn and - probably - CuAl 8 Fe seem to be superior to the others.
    Notes: Kupfer-Aluminium-Knetlegierungen (Al-Gehalte zwischen 5 and 10%), Zusätze von (Fe, Ni und Mn) wurden im Dauer- und im Wechseltauchversuch in einer Lösung mit 20% H2SO4 and 10% FeSO4 bei 40 °C untersucht. Im stranggepreßten Zustand nimmt die Korrosion der einphasigen alpha-Legierungen mit dem Al-Gehalt zu. Größere Menge and ß' - Martensit wirken sich negativ aus. Zusätze von 2 Gew.-% Ni verbessern die Korrosionsbeständigkeit der Legierungen mit 5 und 8% Al nicht. Kaltverformung der alpha-Legierungen führt zu einer beträchtlichen Verstärkung der Korrosion. Wärmebehandlung der Legierungen CuAl 10 Fe 4 Mn 3 Ni und CuAl 10 Fe 4 Ni 5 hat keine positive Wirkung. Die korrosion tritt unter den folgenden Formen auf: Flächenkorrosion (CuAl 5); bevorzugte Korrosion der Korngrenzen (CuAl 8, CuAl 8, CuAl9 Mn 5 FeNi und CuAl 10 Fe 4 Ni 5 nach Wärmebehandlung); Entaluminierung (Cual 10 Fe 4 Mn 3 Ni). Bezüglich der Korrosionsbeständigkeit sind die Legierungen CuAl 5, CuAl 8, CuAl 9 Mn und - wahrscheinlich - CuAl 8 Fe am günstigsten.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250602
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    Analyses of Some Suggested Mechanisms for Atmospheric Corrosion of Iron in Presence of So2 (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 420-424 
    Details
    ISSN: 0947-5117
    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: Analyse einiger für die atmosphärische Korrosion von Eisen in Gegenwart von SO2 vorgeschlagener MechanismenDie geltenden Theorien der atmosphärischen Korrosion von Eisen in Gegenwart von Schwefeldioxid - nämlich der Säure-Regenerationszyklus und ein elektrochemisches Modell - werden aufgrund neuerer experimenteller Ergebnisse überprüft. Dabei wird gezeigt, daß zwischen diesen neuen Ergebnissen und der Annahme des elektrochemischen Modells als des wichtigsten Korrosionsmechanismus kein Widerspruch entsteht. Theoretische Analysen der vorgeschlagenen elektrochemischen Mechanismen werden erörtert und die Ergebnisse auf einen früher vorgeschlagenen Mechanismus sowie auf einen neuen Mechanismus angewandt, der hier als Erweiterung aufgrund der neueren Ergebnisse vorgeschlagen wird.
    Notes: Two established theories of SO2/atmospheric corrosion of iron, viz. the Acid Regeneration Cycle and an electrochemical model, are reviewed in terms of recently reported experimental results and acceptance of the electrochemical model as the main corrosion path.Theoretical analyses of proposed electrochemical mechanism are discussed and applied to a previously suggested mechanism, and a new one suggested here as an extension of recently reported results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250603
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  • 79
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    On the causes of pitting in low carbon steel (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 424-429 
    Details
    ISSN: 0947-5117
    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: Zur Lochfraßkorrosion im FlußstahlAufgrund von optischen und elektro-optischen Beobachtungen von Lochkeimen und ganz ausgebildeten Löchern, die in alkalischen Lösungen auf Flußstahl entstanden waren, werden Folgerungen über Entstehen und Wachstum des Lochfraßes gezogen. Die Bilder zeigen einen direkten Zusammenhang zwischen den Lochfraßmikroschädigungen beim Angriffsanfang und Gefügefehlern im Metall. Nach Beginn der Lochbildung werden die Kristallflächen je nach ihrer Energie unterschiedlich gelöst. Dadurch werden vier- und sechseckige Löcher begrenzt von den (001) und (011) Flächen des α-Eisens gebildet.
    Notes: Conclusions on the initiation and growth of pits are drawn from optical and electrooptical research of the starting points and well developed pits formed in alkaline solutions in low carbon steel. The pictures show that the first attack is closely connected with dislocations in the metal. After growth of the micro-pits, the different crystals planes are dissolved in accordance with their energy. Consequently, pits with square-and hexagonal shape which are bounded by (001) and (011) planes of the α-iron are created.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250604
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  • 80
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    Einfluß der Mikrogeometrie auf den Korrosionseffekt III. Atmosphärische Korrosion bei kapillarer Kondensation (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 435-437 
    Details
    ISSN: 0947-5117
    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: The influence of microgeometry on corrosion - (III)Atmospheric corrosion with capillary condensationWhile there is no condensation on a smooth surface, such a condensation can take place even at relative humidities below 100% in the case of complex and in particular capillary surface. The conditions existing on such a surface can be approximated by a model involving hemi-spherical elevation in contact with each other. On the basis of this model it is possible to calculate the rate to be expected in terms of the geometrical parameter. It is shown that the corrosion effect at the contact points increases as the radius of the hemi-spheres is increased, while the overall corrosion is reduced since the overall number of hemispheres per unit surface is reduced in this case.
    Notes: Während in Luft mit weniger als 100% Feuchtigkeit an glatten Oberflächen keine Kondensation auftritt, kann eine solche Kondensation an komplex geformten und speziell kapillaren Oberflächen wohl erfolgen. Die an einer solchen Oberfläche herrschenden Bedingungen können näherungsweise durch ein Modell mit halbkugelförmigen Erhebungen dargestellt werden, wobei die einzelnen Halbkugeln miteinander in Kontakt stehen. Mit Hilfe dieses Modells läßt sich die zu erwartende Korrosionsgeschwindigkeit in Abhängigkeit vom geometrischen Faktor berechnen. Demnach nimmt die Intensität der Korrosion an den Kontaktstellen mit zunehmendem Radius der Halbkugeln zu, während die Gesamtkorrosion abnimmt, da dann die Zahl der Halbkugeln pro Flächeneinheit zurückgeht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250606
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  • 81
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    Metallische Überzüge (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 475-476 
    Details
    ISSN: 0947-5117
    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/maco.19740250617
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  • 82
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    Organische Werkstoffe (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 473-475 
    Details
    ISSN: 0947-5117
    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/maco.19740250616
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  • 83
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    Anorganische Überzüge nichtmetallische Natur (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 476-476 
    Details
    ISSN: 0947-5117
    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/maco.19740250618
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  • 84
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    Überzüge organischer Natur (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 476-478 
    Details
    ISSN: 0947-5117
    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/maco.19740250619
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  • 85
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    Tarif-Fibel. Von W. Hromadka. 64 S. Robert Pfützner Verlag, München 1974 (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 479-479 
    Details
    ISSN: 0947-5117
    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/maco.19740250622
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  • 86
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    Einführung in die Werkstoffkunde der Kunststoffe. Von W. Laeis. 245 S. mit 121 Abb. und 16 Tab. Format 16,5 × 24 cm. Carl Hanser Verlag, München 1972. Alkorphaneinband 29,- DM. ISBN 3446-1 1527-7 (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 478-478 
    Details
    ISSN: 0947-5117
    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/maco.19740250620
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  • 87
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    Spannzeugnormen (DIN-Taschenbuch 14). Herausg.: Deutscher Normenausschuß (DNA)/Beuth-Vertrieb GmbH, Berlin und Köln. ISBN 3-410-10 403-8. 3., geänderte und erweiterte Aufl. (1973). 260 S. (DIN A 5) - brosch.: 43,- DM (Sonderpreis für Schulen: 27,95 DM) (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 479-479 
    Details
    ISSN: 0947-5117
    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/maco.19740250624
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  • 88
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    Masthead (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974) 
    Details
    ISSN: 0947-5117
    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/maco.19740250801
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  • 89
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    Werkzeugnormen - Hand-Werkzeuge (DIN-Taschenbuch 42). Herausg.: Deutscher Normenausschuß (DNA), Berlin, Köln und Frankfurt/M. - Beuth-Vertrieb GmbH, Berlin und Köln. 2. geänderte Aufl. (1973). 296 S. (DIN A 5) -brosch. 48,- DM (Sonderpreis für Schulen: 31,20 DM). ISBN 3-410-10 413-5. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 564-564 
    Details
    ISSN: 0947-5117
    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/maco.19740250724
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  • 90
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    Die magnetischen Werkstoffe. S. Cedighian. 328 S., 253 Abb., 47 Tab. (DIN A 4). 1974/XV. ISBN 3-18-40 0234-9. VDI-Verlag GmbH, Düsseldorf -kart.: 68,- DM. (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 564-564 
    Details
    ISSN: 0947-5117
    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/maco.19740250725
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  • 91
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    Über den Einfluß der Kaltverformung von Stahl auf Wasserstoffaufnahme und -versprödung bei elektrolytischer Beladung (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 565-570 
    Details
    ISSN: 0947-5117
    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: Effect of cold reduction of steel on hydrogen absorption and embrittlement during electrolytic chargingThe influence of cold work on hydrogen absorption in steel was studied using cold drawn wires. Hydrogen was electrolytically evolved at the steel surface and the absorbed amount analytically determined (hot extraction and gaschromatographic determination) The correlation between absorption time amount of absorbed hydrogen is shown in diagrams for different degrees of deformation by cold work. From these a mean diffusion coefficient is calculated. At low degrees of deformation (10-20% reduction by cold work) the saturation concentration of absorbed hydrogen (after 25 hours) is about 3 ppm. With increasing reduction the saturation concentration increases to a maximum of ca. 11 ppm (at 50%reduction). At still higher degrees of deformation (more than 60%reduction) the saturation concentration decreases again to about 4 PPm.For interpretation of these experimental results two different model hypotheses are discussed.
    Notes: An kaltgezogenen Stahldrähten mit Verformungsgraden von 10 bis 90% wurde der Einfluß der Verformung auf die Wasserstoffaufnahme studiert. Dazu bediente man sich der Methode der elektrolytischen Beladung mit nachfolgender Bestimmung der aufgenommenen Wasserstoffmenge durch Heißextraktion im Vakuum und gaschromatographische Analyse. Der Zusammenhang zwischen der Beladungszeit und der Wasserstoffkonzentration in den Proben wird für alle Verformungsgrade in Diagrammen dargestellt und daraus nach bekannten Verfahren ein mittlerer Diffusionskoeffizient berechnet. Bei geringen Verformungsgraden (10-20%) beträgt die Sättigungskonzentration (nach 25 Stunden) etwa 3 ppm, steigt bei zunehmenden Verformungsgraden zu einem Maximum (etwa 11 ppm) bei ca. 50% Verformung, um bei noch höheren Verformungsgraden (über 60%)wieder auf ca. 3 ppm abzusinken. Abschließend werden zwei Möglichkeiten der Interpretation der experimentellen Ergebnisse zur Diskussion gestellt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250802
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  • 92
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    Über den Einfluß des Gefüges von Zinklegierungen auf die Schutzfähigkeit von Zinkanoden in Seewasser (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 587-592 
    Details
    ISSN: 0947-5117
    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 structure of zinc alloys on the protective capacity of zinc anodes in sea waterThe use of zinc for cathodic protection duties in sea water is restricted because of the considerable polarisation of zinc. The behaviour is due in particular to cathodically active additions of lead, copper and iron. The microcouples then formed give rise to considerable zinc dissolution and to the formation of a thick and dense passivation layer. Since, however, any reduction of the iron content in zinc involves high cost it is more economical to add small quantities of Al, Cd, Si, Hg, Sn or Mn. These additions produce a considerable grain refinement and thus reduce the tendency to form microcouples even in the presence of iron.
    Notes: Die Verwendbarkeit von Zink füf den kathodischen Schutz in Meerwasser ist wegen der beträchtlichen Polarisation des Zinks begrenzt. Die Ursache liegt vor allem bei den kathodisch wirkenden Beimengungen von Blei, Kupfer und Eisen. Die dann entstehenden Mikroelemente führen zu einer beträchtlichen Auflösung des Zinks und zur Bildung einer dicken und dichten Passivierungsschicht. Die Verringerung des Eisengehalts im Zink ist jedoch mit hohen Kosten verbunden, weshalb es wirtschaftlicher ist, das Zink mit geringen Mengen von Al, Cd, Si, Hg, Sn oder Mn zu legieren. Hierdurch wird das Gefüge wesentlich feinkörniger und die Tendenz zur Bildung der Mikroelemente wird auch bei Anwesenheit von Eisen verringert.
    Additional Material: 29 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250805
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  • 93
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    Umschau (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 604-605 
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    ISSN: 0947-5117
    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/maco.19740250808
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  • 94
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    Crevice Corrosion of Titanium and AISI 304 in Acid Solutions. Comparison of experimental and calculated results (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 593-602 
    Details
    ISSN: 0947-5117
    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: Spaltkorrosion von Titan und Stahl AISI 304 in sauren Lösungen. Vergleich von experimentellen und berechneten WertenDer Anfang der Spaltkorrosion der beiden Metalle wurde experimentell untersucht. Dabei wurden zusätzlich die Strom- und die Potentialverteilung über die Spalten durch numerische Integration der entsprechenden Differentialgleichung bestimmt. Die experimentellen Ergebnisse stimmen befriedigend mit den berechneten Werten überein und bestätigen die bei der schematischen Modellierung der Spaltkorrosion eingeführten Annahmen. Bei längerer Versuchsdauer ergaben sich jedoch starke Abweichungen der experimentellen von den berechneten Werten; der Trend war dabei für die beiden Versuchs- werkstoffe entgegengesetzt. So wird im Falle des Stahls nach einer Zeit (die anscheinend unabhängig von dem an die freie Oberfläche angelegten Potential ist) die gesamte Oberfläche innerhalb des Spalts allmählich passiv, während im Gegensatz dazu im Falle von Titan das Korrosionsverhalten der innerhalb des Spalts befindlichen Fläche einen stationären Zustand erreicht.
    Notes: The beginning of crevice corrosion of titanium and AISI 304 in acid solution was investigated experimentally. In addition, the current and potential distributions along the crevices were determined by numerical integration of the differential equation that describes the phenomenon. The experimental results agree satisfactorily with those obtained by calculation and confirm the assumptions introduced in the schematization of the phenomenon. However, long time experiments revealed a progressive deviation of the experimental results from the calculated ones, in the opposite direction for AISI 304 and titanium. Thus, in the first case, following a time that seems to be independent of the potential imposed upon the free surface, the entire surface within the crevice becomes gradually passivated. In contrast, in the case of Titanium the corrosion behaviour of the area within the crevice reaches a steady state.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250806
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    Organisationsplanung. (Planung durch Kooperation.) 376 S. (1974). Siemens AG, Berlin u. München -58,- DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 635-635 
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    ISSN: 0947-5117
    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/maco.19740250820
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  • 96
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    Kunststoffe im Apparatebau I - Schweißen, Kleben, Trennen, Fügen von PVC und Polyolefinen. Von Röber/Vowinkel. Carl Hanser Verlag, München 1972.140 S. mit 86 Abb. und 14 Tafeln; Format DIN A 5. 26,- DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 635-635 
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    ISSN: 0947-5117
    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/maco.19740250823
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  • 97
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    Entwicklung von Verfahren zur gezielten Einstellung der Trägerlebensdauer in Siliziumscheiben. Forschungsber. T 73-05. AEG-Telefunken AG, Berlin und Frankfurt/M. 194 S., 53 Abb., 10 Tab., 3 Schutzrechthinweise und 75 Literaturstellen. Zentralstelle für Luft- und Raumfahrtdokumentation und -information (ZLDI), München 86 -40,75 DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 635-635 
    Details
    ISSN: 0947-5117
    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/maco.19740250821
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  • 98
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    Prüfung und Untersuchung der Korrosionsbeständigkeit von Stählen. Herausg.: Verein Deutscher Eisenhüttenleute; bearb.: Unterausschuß für Korrosion des Werkstoffausschusses. 120 S. (DIN C 5) (1973), 140 Abb. und 10 Tab. -Verlag Stahleisen mbH, Düsseldorf. 42,- DM (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 635-635 
    Details
    ISSN: 0947-5117
    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/maco.19740250822
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  • 99
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    Masthead (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974) 
    Details
    ISSN: 0947-5117
    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/maco.19740250901
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  • 100
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    Zur Korrosionsreaktion des Eisens in Salzsäure, Schwefelsäure und Perchlorsäure (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 646-652 
    Details
    ISSN: 0947-5117
    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: Contribution to the corrosion reaction of iron in hydrochloric, sulfuric and perchloric acidsAt pH values between 0 and 4, even under circulation, a linear relationship results between log jcorr and the pH value, the slope of the corrosion straight line being between -0.23 and -0.27. The dissolution process is predominantly under cathodic control by hydrogen ion discharge; at pH values above 3 the diffusion inhibition of the hydrated proton is the rate controlling step. The corrosion potential in sulfuric and perchloric acids decreases by about 50 mV as the pH is increased, while a different behaviour is observed in hydrochloric acid; this behaviour may be explained in terms of the chloride ion adsorption. In the acids of higher concentration the activation energy is higher than in those of lower concentrations; this phenomenon may eventually be ascribed to a change in the mechanism of the corrosion reaction.
    Notes: Bei pH-Werten zwischen 0 und 4, auch unter Durchströmung, ergibt sich eine lineare Beziehung zwischen log jkorrund dem pH-Wert, wobei die Steigerung der Korrosionsgeraden zwischen -0,23 und -0,27 liegt. Der Auflösungsvorgang ist überwiegend kathodisch gesteuert durch Wasserstoffionenentladung; bei pH-Werten oberhalb 3 ist die Diffusionshemmung des hydratisierten Protons geschwindigkeitsbestimmend. Das Korrosionspotential nimmt in Schwefel- und Perchlorsäure mit steigendem pH um etwa 50 mV ab, während sich für Salzsäure Abweichungen ergeben, die durch die Chloridion-Adsorption zu erklären sind. In den Säuren mit höherer Konzentration liegt die Aktivierungsenergie höher als bei niederen Konzentrationen; das kann eventuell einer Änderung im Mechanismus der Korrosionsreaktion zugeschrieben werden.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740250904
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