Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 344474
Title Studies on the intra- and intermolecular distributions of substituents in commercial pectins
Author(s) Guillotin, S.E.
Source Wageningen University. Promotor(en): Fons Voragen, co-promotor(en): Henk Schols. - [S.l.] : S.n. - ISBN 9085042658 - 155
Department(s) Food Chemistry Group
Publication type Dissertation, internally prepared
Publication year 2005
Keyword(s) pectinen - chemische eigenschappen - fysische eigenschappen - voedseladditieven - pectins - chemical properties - physical properties - food additives
Categories Chemistry of Food Components
Abstract Commercial pectins are mainly used for the gelling, thickening and stabilizing properties in food products. The different physical properties of pectins strongly depend on the galacturonic acid level and the level of methyl-esterification as well as on the molecular weight distribution. However, the conventional chemical analysis of the pectins does not always show differences between pectins while they behave differently. Two highly methyl-esterified pectins with similar chemical characteristics but different reactivity towards calcium were analysed. They were found to be a mixture of pectic populations differing in the degree of methyl-esterification as well as in the distribution of these methyl-esters. Amidated pectins with similar chemical features but different calcium sensitivity were also found to be a mixture of different pectic populations. Even for pectins having a similar degree of substitution, the ratio of amide groups versus methyl-esters varied significantly. In addition, the distribution of these substituents was found to differ.
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