Molecular mechanisms underlying amylose aggregation and gelation

Gidley, Michael J. (1989) Molecular mechanisms underlying amylose aggregation and gelation. Macromolecules, 22 1: 351-358. doi:10.1021/ma00191a064

Author Gidley, Michael J.
Title Molecular mechanisms underlying amylose aggregation and gelation
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
Publication date 1989-01
Sub-type Article (original research)
DOI 10.1021/ma00191a064
Volume 22
Issue 1
Start page 351
End page 358
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract The molecular origin of the aqueous aggregation and gelation behavior of amylose is shown to lie in the formation of interchain double helices. Gelation is shown to be possible from "dilute" nonentangled amylose solutions, and no correlation is found between critical gelling concentrations and coil overlap concentrations for a range of amylose chain lengths. NMR and X-ray diffraction experiments show that amyloses precipitated from dilute aqueous solution contain only B-type aggregated double helices and that amylose gels contain rigid double-helical "junction zones" interconnected by more mobile amorphous single-chain segments. Optical rotation results suggest that the double-helix structure underlying amylose aggregation and gelation may have a left-handed conformation.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Nutrition and Food Sciences Publications
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Created: Wed, 16 Mar 2011, 20:32:26 EST