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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 4 (1949), S. 78-90 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The determined P2O5-contents of pectin preparations in the ashes originates partly from inorganic and organic accompanying substances (phosphatides), but partly from esterfied pectin chains by H3PO4; an interlocking of the pectin chains by H3PO4-bridges to „Übermolekülen“ must be assumed in the protopectin, which are relatively set back in comparison to the interlocking by polyvalent metal ions over carboxyl groups.
    Notes: Der bei Pektinpräparaten festzustellende P2O5-Gehalt in der Asche stammt teils von anorganischen und organischen Begleitstoffen (Phosphatiden), teils aber auch von Veresterungen der Pektinketten durch H3PO4; im Protopektin der Pflanzen hat man Vernetzungen der Pektinketten durch H3PO4-Brücken zu „Übermolekülen“ anzunehmen, die zahlenmäßig jedoch gegenüber den Vernetzungen durch mehrwertige Metallionen über die Karboxylgruppen zurücktreten.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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