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  • 1
    ISSN: 1573-8388
    Keywords: Lupinus angustifolius ; Lupinus luteus ; polysaccharides ; structure ; hydrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Polysaccharides ofLupinus angustifolius (Bryansk 123 and Krystall varieties) andLupinus luteus (SG-91 variety) are extracted and hydrolyzed. Their chemical composition and structural features are studied. Optimal conditions for extraction, hydrolysis, and purification of the lupine polysaccharides are found. Structural features of the isolated pectins are determined based on13C NMR and IR spectroscopy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 347 (1966), S. 191-198 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dielectric measurements on trimethylvinyl, allyl, and butenyl silane have shown that the vinyl silane has a structure being similar with that of trimethylphenyl silane. Where as in the latter compound, however, six electrons are on a seven-centric molecular term, the two π-electrons of the vinyl compound are on a three-centric one. In both cases the Si atom exhibites +I inductive and -M mesomeric action. The reactivity of allyl silane is due the strong M and E effect resulting from CH2 hyperconjugation and the +I effect of Si.
    Notes: Dielektrische Untersuchungen an Trimethyl-vinyl, Allyl- und Butenyl-silan zeigten, daß Vinyl-trimethyl-silan eine ähnliche Struktur wie Phenyl-trimethyl-silan besitzt mit dem Unterschied, daß die zwei π-Elektronen bei der Vinylverbindung auf ein trizentrisches, hingegen bei der Phenylverbindung sechs Elektronen auf ein heptazentrisches Molekülniveau gelangen. In beiden Fällen übt das Silicium eine +induktive (+I) und -mesomere (-M) Wirkung aus. Die Reaktionsfähigkeit der Allylverbindung ist dem stark erhöhten M- und E-Effekt zuzuschreiben, der durch den Hyperkonjugationseffekt der CH2-Gruppe und den +I-Effekt des Siliciums hervorgerufen wird.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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