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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 523 (1988), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 523 (1988), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Heat and mass transfer 21 (1987), S. 155-162 
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Kritisch gefüllte Thermosyphons für den Wärmetransport unterscheiden sich von kritisch gefüllten Testzellen für Stoffwertuntersuchungen durch größere Ausdehnung und aufgeprägtes Temperaturgefälle. Die thermodynamischen Zustände im Fluid des Thermosyphons sind damit wesentlich heterogener. In einem gläsernen Thermosyphon ließen sich Strömungen und Phasenverteilungen beobachten. Das bekannte Zusammenbrechen des Wärmetransportmechanismus zeigte sich als Folge des Überflutens der Kühlzone durch Flüssigkeit. Der Einfluß von Heizleistung, Druck und Füllmenge auf die Verteilung der Phasen, das Auftreten von Pulsationen und die Auswirkung eines Heizimpulses nahe dem kritischen Zustand wurden beobachtet und mit Hilfe des Dichte/Druck-Diagramms erklärt.
    Notes: Abstract Critically filled thermosyphons for heat transport differ in size and temperature distribution from critically filled testcells for property research. Consequently, the thermodynamic states within a thermosyphon are distributed more heterogeneously. In a glass thermosyphon, flows and phase distributions were observed. A break-down of the heat transport mechanism was found as a consequence of flooding of the cooling region by liquid. Observed and explained - by use of a density/pressure diagram - were the effects of heating, of pressure and of fluid quantity on the distribution of the phases, the appearance of pulsations and the propagation of a heat pulse near the critical state.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 10 (1989), S. 687-700 
    ISSN: 1572-9567
    Keywords: critical point ; enhancement ; fluorochlorohydrocarbons ; hotwire method ; refrigerant R115 ; thermal conductivity ; transient method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By means of the transient hot-wire method, the thermal conductivity of refrigerant R115 was measured over a wide region around the thermodynamic critical point. The enhancement of thermal conductivity was clearly observed at states close to the critical point. The thermal conductivity obtained for saturated liquid was compared to data by other authors with satisfactory agreement. For the thermal conductivity including the critical enhancement, equations are given according to the suggestion by J. V. Sengers. Comparison with measured data shows systematic deviations, with theoretical values being larger except for temperatures very close to the critical and densities above the critical.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 197-198 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 251-271 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Basing on histomorphological evaluations and morphometrical quantifications in a standardized model experiment, a comparison is made between the reactions of skeletal tissues to various glasses, glassceramics and enamels. On the surface of these so-called reactive biomaterials either a direct bonding to mineralized bone or also different amounts of osteoid or chondroid tissue formation can be observed, depending on the composition of the material. It is shown that (1) the solubility of the glasses cannot directly be related to the reactivity and the resulting bone bonding; (2) bone binds only to glasses with a controlled release of constituents and which exhibit a seam of extracellular matrix on their surface, in which normal primary mineralization can occur; (3) the release of constituents such as Al2O3, Ta2O5, ZrO2, or phosphates from the material can inhibit this normal mineralization and the transformation of chondroid tissue to bone; (4) if connective tissue instead of bone is present at the interface (either primarily or after bone remodelling), the dissolution (or corrosion) of the material may be no longer controllable, and the tissue reacts with a continuous inflammatory response to the corrosion products.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 22 (1988), S. 1033-1041 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The extracts of four glass-ceramic bone implant materials were investigated for dissolved material, for effects on in vitro formation of hydroxyapatite, and for surface morphology of glass-ceramic particles in scanning electron microscopy. In vitro leaching released substances that affected in vitro formation of hydroxyapatite, i.e., initiation time and growth of crystals. Leaching also changed the surface morphology of the materials. The ability of the materials to bond to bone did not correlate with the inhibition of hydroxyapatite formation by the released substances. Surface morphology and other factors at present not yet known are probably involved in controlling the bonding to bone of these ceramics.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 23 (1989), S. 1149-1168 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: A new composite implant material titanium/glass-ceramic was tested in rabbits using light microscopy, histomorphometry, and biomechanical testing methods. Two rabbit implant models were used. The first premolar tooth was replaced and cylinders inserted into the trabecular bone of the distal femur below the patella sliding plane. There was bone bonding to the glassceramic component and additional mechanical interlocking, due to bone ingrowth between the titanium matrix into secondary pores. This was proved by measuring the tensile strength at the interface of the new composite material which was in the same range as compared to pure glassceramic implants. In tooth replacement there was a tight attachment of gingival epithelium and stroma to composite titanium/glass-ceramic. These results are of particular clinical interest: physicochemical bone bonding and additional mechanical interlocking result in a resistance of the implant material against shear and tensile loads at the interface. Therefore this new composite material should be suitable for further load-bearing applications.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 431-433 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Chain extending reactions were found to be initiated by repeated action of accelerated electrons on the gaseous and volatile C1 to C6 degradation products in inhert atmosphere. The analytical data indicate also increasing formation of branched products. Basic aspects of the mechanism of the radiation degradation of PTFE are discussed.
    Notes: Durch erneute Einwirkung beschleunigter Elektronen auf die gasförmigen und leicht flüchtigen Produkte des strahlenchemischen PTFE-Abbaus vom Kettenlängenbereich C1 bis C6 in inerter Atmosphäre werden Reaktionen der Kettenverlängerung ausglöst. Die analytischen Befunde beweisen ein stärkers Auftreten kettenverzweigter Produkte. An Hand der Ergebnisse werden einige grundlegende Aspekte zum Reaktionsmechanismus des strahlenchemischen Abbaus von PTFE diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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