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  • 1985-1989  (3)
  • 1950-1954
  • 1988  (3)
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  • 1985-1989  (3)
  • 1950-1954
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 186 (1988), S. 99-107 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Ganglioside sind Sialinsäure enthaltende Lipide (N-Acetylneuraminsäure), die als funktionell wichtige Bausteine besonders in Membranen anzutreffen sind. Sie spielen eine wichtige Rolle in vielen elementaren physiologischen Vorgängen in tierischem Gewebe. Um ihre weite Bedeutung näher zu untersuchen bzw. die komplexe Struktur zu charakterisieren, sind aufwendige analytische Verfahren notwendig, die in dieser kurzen Übersicht dargestellt werden, d. h. Extraktion, Reinigung und Anreicherung Bowie chromatographische Methoden. In der Milch (Milchfettkügelchenmembran) wurden bisher drei Ganglioside in ihrer Struktur aufgeklärt. Sie werden bei der Verbutterung in der Buttermilch angereichert und könnten so als wichtiges analytisches Hilfsmittel dienen.
    Notes: Abstract Gangliosides are sialic acid containing lipid compounds of a very complex nature, which are involved in many physiological processes. Gangliosides are very important constituents of membrane material in animal tissue, where they occur at very low concentrations. Improved analytical procedures are therefore required to study their behaviour, their role in living systems and their isolation for further investigations. In this paper, all analytical methods which may be important in the analysis of gangliosides are summarized and discussed. These include extraction, purification, enrichment and chromatographic procedures. In bovine milk, three gangliosides of known structure are present. Their isolation, structure and analytical importance (buttermilk) are also reported.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 373 (1988), S. 377-382 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 37 (1988), S. 83-100 
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé Hellman et Schwalbe ont établi, dans un travail précédent, que, lorsque la ténacité à la rupture est exprimée par δ5, un critère de COD, les courbes R présentent un undépendance plus sérieuse par rapport à la géométrie que lorsque l'on retient J comme critère de ténacité. Ceci a été démontré pour trois matériaux, trois géométries et des tailles relatives de fissure variables. L'objet de la présente étude est de réévaluer ces mêmes données en utilisant comme critère de ténacité un paramètre J modifié (J M), et de démontrer que des courbes R d'une indépendance comparable par rapport à la géométrie peuvent être tracées. On développe un raisonnement établissant la compatibilité entre les critères de ténacité δ5 et J M.
    Notes: Abstract Previous work of Hellmann and Schwalbe [13] had shown that when fracture toughness is expressed in terms of δ5 (a crack opening displacement parameter), R curves have more consistent geometry independence than when the toughness parameter is J. This was shown for three materials, three geometries, and for variable relative crack sizes. The objective of the present study was to re-evaluate these same data using modified J (J M ) as the toughness criterion and to show that similar geometry independent R curves could be developed. A rationale for the consistency between δ5 and J M toughness criteria is developed.
    Type of Medium: Electronic Resource
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