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  • 1
    Electronic Resource
    Electronic Resource
    Effect of process parameters on the residual stresses and the wear behavior of aluminum nitride physical vapor deposition coatings
    Amsterdam : Elsevier
    Surface & Coatings Technology 54-55 (1992), S. 167-172 
    Details
    ISSN: 0257-8972
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0257-8972(92)90157-6
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  • 2
    Electronic Resource
    Electronic Resource
    Die Bakterienflora der medizinischen Blutegel (1953)
    Springer
    Archives of microbiology 19 (1953), S. 52-86 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung 1. Blutegel (Hirudo officinalis und H. medicinalis) besitzen einen obligaten bakteriellen Darmsymbionten: Pseudomonas hirudinis, der für die Aufschließung des Nahrungsblutes verantwortlich ist. Dieser alleinige Bewohner des Egeldarms wird durch einen festen Übertragungsmechanismus über die Kokonflüssigkeit an die Nachkommenschaft weitergegeben. 2. In der Egelharnblase kommen regelmäßig 2 Corynebakterienarten vor: C. vesiculare und C. nephridii. — Der angebliche Cilienbesatz des Harnblasenepithels erweist sich als eine Reinkultur von C. vesiculare. — Beide Bakterienarten sind in der Lage, aus organischen Harnbestandteilen größere Mengen von Ammoniak in Freiheit zu setzen. 3. Auf der Egeloberfläche findet sich eine, je nach dem Bakteriengehalt des Biotops wechselnde Bakterienflora heterogener Zusammensetzung. Eine physiologische Beziehung dieser epiphytischen Flora zum Blutegel konnte nicht ermittelt werden. Die Existenz des “Bacillus hirudinis” nach Schweizer wird in Zweifel gezogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00412315
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  • 3
    Electronic Resource
    Electronic Resource
    Lungenveränderungen bei rachitischen Ratten nach experimenteller Infektion der oberen Luftwege (1970)
    Springer
    European journal of pediatrics 109 (1970), S. 135-141 
    Details
    ISSN: 1432-1076
    Keywords: Rickets ; Respiratory Diseases ; Infectious Resistence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Ergebnisse histologischer Untersuchungen des Bronchopulmonaltraktes nach experimenteller nasaler Infektion rachitischer und nichtrachitischer Ratten mit Klebsiellen und Pneumokokken werden mitgeteilt. Während bei den Kontrolltieren als Antwort auf die Infektion eine überwiegend rundzellige entzündliche Reaktion in Bronchien und interstitiellem Gewebe der Lunge die Regel ist, weisen die rachitischen Tiere in einem größeren Prozentsatz ausgedehnte eitrige Entzündungen auf.
    Notes: Abstract The results of endonasal infections in rickety and normal rats with Klebsiella pneumoniae and Diplococcus pneumoniae are reported. Both groups of animals show an inflammation of the bronchopulmonary system. However, whereas the control animals react to the infection with an infiltration of mainly lymphoid cells in the bronchial wall and in the interstitial tissue, a higher percentage of rickety animals show a more diffuse leucocytic inflammation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00438811
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  • 4
    Electronic Resource
    Electronic Resource
    Kristalle als Ursache der Glanzflecke auf Kolonien von Bacterium pyocyaneum (1964)
    Springer
    Archives of microbiology 48 (1964), S. 332-338 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung Die metallisch glänzenden Flecke auf Kulturen von Bact. pyocyaneum werden von Kristallen hervorgerufen. Ihre mechanischen Eigenschaften, das Verhalten beim Erhitzen, ihre Löslichkeit und Färbbarkeit sowie ihr Verhalten im polarisierten Licht werden beschrieben. Cholesterin, Lecithin und Glycerin im Nährboden regen die Bakterien zu vermehrter Glanz- und Kristallbildung an. Die Ergebnisse der Untersuchungen lassen auf die (hydrophobe) Lipoidnatur der Kristalle schließen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00405977
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  • 5
    Electronic Resource
    Electronic Resource
    Zum bakteriologischen Nachweis von Krankheitserregern im strömenden Blut mit Hilfe von polyanetholsulfosaurem Natrium (“Liquoid”) (1968)
    Springer
    Annals of hematology 17 (1968), S. 326-335 
    Details
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The authors tested the culturing of micro-organisms from the circulating blood. “Liquoid” was used as an anticoagulant and to eleminate the inherent bactericidal factors. 1. The growth of meningococci is considerably inhibited in the “Liquoidvenule” filled with 8 ml of the patient's blood. Inhibition of streptococci and staphylococci is probable, particularly if the “Liquoid”-concentration increases by filling it with less blood. Under identical test conditions the growth of the tested grampositive and gramnegative rods was not affected. 2. The findings obtained at the Würzburg Institute of Hygiene cannot be compared to the blood culture statistics of other authors as a number of the prerequisites for statistic comparisons are absent. On the basis of the test results the authors suggest decreasing the “Liquoid”-concentration in the “Liquoid-venules” to 0.25%, and they also suggest special incubation techniques.
    Notes: Zusammenfassung Es wird die Züchtung von Keimen aus strömendem Blut mit “Liquoid” als Mittel zur Gerinnungshemmung und Ausschaltung der Eigenbakterizidie untersucht. 1. In der mit 8 ml Patientenblut gefüllten “Liquoid-Venüle” ist die Vermehrung von Meningokokken erheblich erschwert; bei Streptokokken und Staphylokokken ist eine Hemmung wahrscheinlich, insbesondere dann, wenn die “Liquoid”-Konzentration durch Füllung mit weniger Blut größer wird. Das Wachstum der geprüften grampositiven und gramnegativen Stäbchenbakterien blieb unter denselben Versuchsbedingungen unbeeinflußt. 2. Die am Würzburger Hygiene-Institut erhobenen Befunde können nicht mit Blutkulturstatistiken anderer Autoren verglichen werden, da eine Reihe von Voraussetzungen für statistische Vergleiche nicht gegeben sind. Auf Grund der Untersuchungsergebnisse werden Senkung der “Liquoid”-Konzentration in den “Liquoid-Venülen” auf 0,25% und besondere Bebrütungstechniken vorgeschlagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01561234
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  • 6
    Electronic Resource
    Electronic Resource
    Errata (1968)
    Springer
    Annals of hematology 18 (1968), S. 192-192 
    Details
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01632432
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  • 7
    Electronic Resource
    Electronic Resource
    318. Früherkennung der akuten posttraumatischen Osteomyelitis durch bakteriologische Untersuchung der Redon-Drainagen (1971)
    Springer
    Langenbeck's archives of surgery 329 (1971), S. 1163-1163 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 50 Eingriffen an Extremitäten, darunter 37 Osteosynthesen, wurden die Spitzen der eingebrachten Redon-Drainagen bakteriologisch untersucht. Die Entnahme erfolgte ca. 48 Std nach der Operation. 28mal waren die Drain-Spitzen steril, nur 1mal fanden wir darunter einen leichten Infekt der Operationswunde. 6mal sahen wir eine akute posttraumatische Osteomyelitis, weitere 5mal Weichteilinfekte ohne Beteiligung des Knochens. Bei allen diesen 11 Fällen konnten an der Spitze des Redon-Drains Keime nachgewiesen werden, bei den Osteomyelitiden sowie 3 schweren Weichteilinfekten jedesmal Staphylokokken. Es scheint somit möglich, bereits am 3.–4. postoperativen Tage eine differenzierte Auskunft über eine eventuelle Keimbesiedelung der Operationswunde erhalten zu können. Damit ist die Basis für einen gezielten und schnellen Therapieeinsatz gewährleistet.
    Notes: Summary The tips of the inserted Redon-drainage-tubes were bacteriologically examined after 50 operations on the extremities which included 37 osteosyntheses. The withdrawal was carried out about 48 h after the operation. The tips of the drainage tubes were sterile in 28 cases, only once did we find a slight infection of the operational wound. In six cases we observed an acute post-traumatic osteomyelitis and in another five infections of the soft tissues without bone participation. In all 11 cases germs were present in the tip of the Redon-drain. In the osteomyelitis cases and in three with severe soft tissue infections the infectioe organisms always were staphylococci. Therefore, it seems possible to obtain a detailed account of the possible bacterial invasions of the operation wound already on the 3rd to the 4th day after the operation. The basis for a selective and rapid onset of therapy is thus warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01770752
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  • 8
    Electronic Resource
    Electronic Resource
    Mechanisms and micromechanics of fatigue crack propagation in glassy thermoplastics (1990)
    Springer
    Colloid & polymer science 268 (1990), S. 814-822 
    Details
    ISSN: 1435-1536
    Keywords: Fatigue ; crackpropagation ; thermoplastics ; crazestress ; crazeextensionratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An iterative approach is used to estimate, from interference optics measurements, the variation of refractive index and, hence, extension ratio along the length of a craze at the tip of a fatigue crack. The finite element method is used to compute craze surface stress distributions which are found to be similar to those obtained for static loading. High extension ratios, in the range 6 to 8 for retarded fatigue crack growth in poly(vinylchloride), are attained in the craze fibrils at the crack tip before crack jump occurs. The craze thickens primarily by surface drawing during the early stages of its growth but in the later stages the fibril creep mechanism predominates. The critical fibril extension ratio is not reached in a single cycle, as in normal fatigue crack propagation, and crack jump does not occur until, typically, after several hundreds of cycles during which the fibrils accumulate considerable damage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410959
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  • 9
    Electronic Resource
    Electronic Resource
    Micromechanics of fatigue crack propagation in glassy thermoplastics (1984)
    Springer
    Colloid & polymer science 262 (1984), S. 230-235 
    Details
    ISSN: 1435-1536
    Keywords: Fatigue ; crack propagation ; thermoplastics ; craze length ; fracture surface markings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract By the aid of the optical interference method the size of the craze zone at the crack tip has been measured during fatigue crack propagation (FCP) in two glassy thermoplastics thus giving a basis to re-examine proposed models. In contrast to previous assumptions it has been found, that in PMMA of high molecular weight crack propagation occurs only during a short interval of the loading cycle when the fibrils are stretched most severely and it is not limited by crack tip blunting; between the dimensions of the craze zone and the crack advance per cycle which is also reflected by markings on the fracture surface no simple correlation has been found. In PVC first the craze grows continuously during many loading cycles up to its final size and then the crack propagates by a jump separating the craze zone only partly. Thus at all stress intensity levels investigated the length of the final craze zone has been found to be distinctly larger than the jump spacing on the fracture surface. By aid of SEM-photography it is shown that in PVC during FCP cracking occurs by separation of fibrils instead of void coalescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01458966
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  • 10
    Electronic Resource
    Electronic Resource
    Study of the toughening mechanism of crazing in rubber modified thermoplastics (1992)
    Springer
    Colloid & polymer science 270 (1992), S. 972-981 
    Details
    ISSN: 1435-1536
    Keywords: Crazing ; crazedimensions ; electronmicroscopy ; opticalinterferometry ; rubbertoughening ; thermoplastics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Single crazes in transparent glassy thermoplastics are measured by means of optical interferometry. Applying numerical or analytical methods to measured creaze shapes, also their micromechanics has been evaluated. These data can be transferred to rubber-modified species of the respective thermoplastics to predict craze-governed toughening. Such predictions can be verified by comparison with results of electron microscopic investigations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655966
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