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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Biological cybernetics 29 (1978), S. 49-55 
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract Measurements on the auditory perception of subjectively uniform rhythm lead to the concept of the perceptual moment. In accordance with the experimental results, the perceptual moment is a function of the duration of the sound impulse and of its temporal envelope. A model for these functional relations is developed, which consists mainly of a first-order low pass, as it was concluded that the temporal perception of sound impulses is dependent on the transient behavior of the auditory system. The perceptual moment of a sound impulse is defined as the moment at which a certain percentage (16%) of the maximum of the transient is trespassed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Chemistry of natural compounds 12 (1977), S. 696-699 
    ISSN: 1573-8388
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The biosynthesis of the alkaloids ofAmmothamnus lehmannii Bge. have been studied by supplying the plants with [1,5-14C2] cadaverine. It has been shown that cadaverine is a precursor of sophocarpidine, sophocarpine, and pachycarpine. Possible routes of interconversions have been studied by supplying the plants with the tritium-labelled alkaloids [3H] sophocarpine, [3H] matrine, and [3H] pachycarpine.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Chemistry of natural compounds 13 (1977), S. 210-212 
    ISSN: 1573-8388
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The biosynthesis of the alkaloids ofAmmodendron karelinii Fisch. et Mey has been studied by feeding the plant with labelled [1,5-14C]cadaverine. It has been shown that cadaverine is a precursor of anagyrine, pachycarpine, ammodendrine, N-methylcytisine, and cytisine. Possible routes of interconversions have been considered by feeding the plant with the tritium-labelled [3H]pachycarpine, [3H]lupanine, [3H]anagyrine, and [3H]ammodendrine.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 117-122 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Preparation of O-Substituted Esters of SugarsIn this paper the syntheses of 14 O-acetylated carbohydrate esters of different acids are described according to a new method. The esters are prepared by reaction of the acids with O-substituted halocarbohydrates, e. g. acetobromoglucose in the presence of amines, e. g. triethylamine. We have synthesized according to this procedure also the 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosylesters of such instable acids like abscisic acid, 3-indoleacetic acid and gibberellic acid in yields of more than 50%.
    Notes: Es werden die Synthesen von 14 O-acetylierten Zuckerestern verschiedenster Säuren nach einem neuen Verfahren beschrieben. Die Darstellung erfolgt durch Umsetzung der Säuren mit O-substituierten Halogenzuckern, z. B. α-Acetobromglucose in Gegenwart eines Amins, z. B. Triäthylamin. Nach dem Verfahren gelang unter anderem die Darstellung der 2,3,4,6-Tetra-O-acetyl-β-D-glucopyranosylester solch empfindlicher Säuren wie Abscisinsäure, 3-Indolylessigsäure und Gibberellinsäure in Ausbeuten von über 50%.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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