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  • 1965-1969  (11)
  • 1960-1964
  • 1955-1959
  • 1969  (11)
Material
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  • 1965-1969  (11)
  • 1960-1964
  • 1955-1959
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 219 (1969), S. 482-500 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method is described which allows the study of the magnetic properties of superconductors. Measurements on various niobium and lead samples were taken to study the influence of surface conditions and lattice defects on the formation of the mixed and intermediate states. A strong dependence of flux penetration on surface conditions is found. AboveH C1 the results indicate the formation of a disturbed flux line lattice. The influence of external fields present when the superconductor is cooled throughT c is discussed and evidence for the intermediate state of type II superconductors is presented. Finally a simple model is used to evaluate the mean angle of deviation from the ideal lattice.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 20 (1969), S. 572-574 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 25 (1969), S. 571-572 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary (±)-B-Homoestrone and its derivatives, a hitherto unknown class of compounds, were synthetized from 3-methoxybenzosuberone as the starting material. Introduction of the asymmetric centers could be achieved with a high degree of stereoselectivity; the correct, ‘estrone-like’ relative configuration of these centers was demonstrated by X-ray crystallographical analysis, carried out on a single crystal of (±)17β-acetoxy-3-methoxy-B-homoestra-1, 3, 5(10)-triene.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 20 (1969), S. 571-572 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 20 (1969), S. 574-577 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 66 (1969), S. 250-258 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In extension of previous studies on the regulation of the aromatic amino acid pathway in blue-green and green algae the control of two branch-point enzymes, namely chorismate mutase and anthranilate synthetase has been studied. The activity of chorismate mutase in these organisms is effectively inhibited by l-tyrosine or l-phenylalanine. l-tryptophan, in contrast, proved to be a positive effector of the enzyme: in the absence of phenylalanine or tyrosine tryptophan slightly stimulated chorismate mutase activity; this stimulation was even brought about in the presence of excess phenylalanine or tyrosine, irrespective if the enzyme had been preincubated with these inhibitors or not. Tryptophan thus proved to completely revert the feedback inhibition of this enzyme by phenylalanine or tyrosine. Substrate saturation curves of chorismate mutase activity are hyperbolic in the presence of tryptophan and sigmoid in the presence of phenylalanine or tyrosine. In contrast to the enzymes of the green algae investigated, chorismate mutase activity of Anacystis nidulans, a member of the class of the blue-green algae was not affected by any of the aromatic amino acids. The activity of anthranilate synthetase, the second enzyme of the chorismic acid branch-point of the pathway was consistently inhibited by l-tryptophan in all the organisms tested. The results described here bear significance on the regulation of a multi-branched pathway the first enzyme of which is inhibited just by one endproduct.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Planta 88 (1969), S. 136-143 
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Indole auxin synthesis during enzymatic hydrolysis of glucobrassicin by myrosinase proved to be strictly dependent on pH. Neither IAN nor other indole compounds with auxin activity are synthesized at pH values higher than 5.2. An in vivo function of the indole glucosinolates as auxin precursors in Cruciferae is therefore of low probability.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of pest science 42 (1969), S. 92-93 
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An Sprague-Dawley-Ratten wurden nach orthotopn autologen und homologen Vollhauttransplantationen die Serumkomplementspiegel mit der Titrationsmethode bestimmt. Während nach den Autotransplantationen als Ausdruck der „akuten Phase” ein Titeranstieg beobachtet wurde, fiel der Titer nach den Homotransplantationen mit hoher, statistisch gesicherter Signifikanz ab. Die antikomplementäre Wirkung des Na-Cu-Chlorophyllins auch nach intraperitonealer Injektion wurde bestätigt. Diese Komplementhemmung war nach autologen und homologen Hauttransplantationen aufgehoben, wobei sich aus den Resultaten keine Möglichkeit ergab, diesen Effekt zu erklären.
    Notes: Summary In Sprague-Dawley-Ratten, after orthotopic, autologenous and homologenous complete skin transplantation, the serum complement-level was determined by the titration method. Whilst an increase in titre was observed as a reflection of the acute phase after auto-transplantation, the titre fell with a higher statistical significance after the homo-transplantation. The anti-complementary effect of Na-Cu-chlorophylline injection, even when administered intraperitoneally, was confirmed. This complement inhibition has been emphasized after autologenous and homologenous transplants, where it was not possible to explain this effect from the results.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 8 (1969), S. 533-534 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No. Abstract.
    Type of Medium: Electronic Resource
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