Structural Aspects of Partially Acetylated Degraded Amylopectins — A13C NMR Study

Autor:	Michael Stanek, Reinhold Wutka, Heinz Falk
Rok vydání:	1997
Předmět:	chemistry.chemical_classification Chemistry Stereochemistry Chemical structure Organic Chemistry food and beverages Carbon-13 NMR Polysaccharide carbohydrates (lipids) chemistry.chemical_compound Amylose Acetylation Amylopectin Moiety Food Science Glucan
Zdroj:	Starch - Stärke. 49:488-491
ISSN:	1521-379X 0038-9056
DOI:	10.1002/star.19970491205
Popis:	1 3C NMR signal assignments were achieved for amylose and amylopectin triacetates and a series of partially acetylated, acid degraded amylopectin derivatives. Using the relative intensities of several of these signals for the latter materials the following could be deduced. First, within the molar substitution range of 0.47 and 0.72 the acetylation of partially degraded amylopectins takes place randomly distributed at all glucan moieties of the polysaccharide. Second, the probabilities of substitutions of hydroxyl groups in positions 2, 3, and 6 of a discrete glucan moiety are equivalent.
Databáze:	OpenAIRE
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