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  • 1980-1984  (5)
  • 1975-1979  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 17 (1983), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A B-cell subset with Fc receptors for IgA (Bα cells) has been observed in human peripheral blood. To investigate aberrations of B cells in a diseased state, the percentages of Bα cells were enumerated in peripheral blood from patients with IgA nephropathy, which is characterized by preponderant deposition of IgA-dominant immune complexes in the glomerular mesangial area. The present study showed a significant increase in Bα cells in peripheral blood from patients with IgA nephropathy but not in those with chronic proliferative glomerulo-nephritis without mesangial IgA deposition. Most FcαR-bearing cells were observed in surface IgA bearing lymphocytes. No linear correlation was observed between the levels of serum IgA and the percentages of Bα cells. The addition of aggregated IgA to cultures did not induce FcαR-bearing B cells in vitro. It is postulated that Bα cells might have some pathogenetic role in the development of IgA nephropathy and that some antigenic stimuli might play a role in the increase of peripheral blood Bα cells in patients with IgA nephropathy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1423-1424 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The biotransformation of cleomeprenols-1-3H by the larvae ofPieris rapae crucivora Boisduval has been investigated. It was found that cleomeprenols fed to the larvae are transformed into long chain fatty acid esters that are excreted in the feces.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 37 (1981), S. 1252-1253 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Aloenin has been established to be 4-methoxy-6-(2-β-D-glucopyranosyloxy-4-hydroxy-6-methylphenyl)-2-pyrone; it shows an inhibitory activity for gastric juice secretion. Rats metabolized it to 4-methoxy-6-(2,4-dihydroxy-6-methylphenyl)-2-pyrone, 2,5-dimethyl-7-hydroxychromone and glucose, which were excreted in the feces and the urine. The distribution of the radioactivity originating from14C-labeled aloenin was studied. The tracer found in the kidney and the liver reached 60% of the amount administered 24 h after feeding and decreased rapidly in the next 24 h.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The interconversion between 5 to 8-membered cycloalkanones and the corresponding cycloalkanols by a cell suspension culture of Nicotiana tabacum was studied. It was found that the interconversion is at equilibrium and the balance in the equilibrium depends on the number of carbon atoms in the carbocyclic ring of the substrates; the equilibrium in the interconversion of the 6-membered compound lies toward the side of the cycloalkanol, while in the cases of the 5, 7, and 8-membered compounds the cycloalkanones are favoured.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The enantiomeric pairs of borneol, isoborneol, and isopinocampheol were incubated with the cultured suspension cells of Nicotiana tabacum. One of each enantiomeric pair was preferentially transformed to the corresponding carbonyl compound. It was thus demonstrated that the cultured cells have the ability to discriminate between the enantiomers of the bicyclic terpene alcohols.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 371-377 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Bruchenergiemessungen an keramischen WärmedämmschichtenDie Bruchenergie von plasmagespritzten Wärmedämmschichten aus ZrO2 · MgO, ZrO2 · Y2O3, ZrO3 · CaO · Al2O3 und Al2O3 · TiO2 auf Metallsubstraten wurde sowohl für einen Adhäsionsbruch als auch für einen Kohäsionsbruch der Deckschichten mit Hilfe gekerbter Schichtverbundbiegeproben ermittelt. Die verallgemeinerte Energiefreisetzungsrate wurde als Maß für die Bruchenergie benutzt. Sie berücksichtigt die in der Kraft-Durchbiegungskurve der Proben auftretende Nichtlinearität. Das Versagen der Proben innerhalb der Deckschicht oder in der Grenzfläche wird von der Bildung und Vereinigung von sekundären Rissen in der Deckschicht begleitet. Diese Vorgänge verursachen das nichtlineare Verformungsverhalten und eine von der Rißgeschwindigkeit abhängige Bruchmorphologie.
    Notes: The fracture energy of plasma-sprayed thermal barrier coatings of ZrO2 · MgO, ZrO2 · Y2O3, ZrO2 · CaO · Al2O3, and Al2O3 · TiO2 on metal substrates is obtained for both adhesive and cohesive failure modes of the coatings using notched layer-bonded bend test specimens. The generalized energy release rate was employed as a measure of the fracture energy. It takes account of the nonlinearity found in the load-deflection curves of the specimens. The failure of the specimens within the coating or at the interface is accompanied by the formation and linking of secondary cracks in the coating. This causes the non-linearity in the deformation behaviour and a rate-dependent failure morphology.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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