Document Detail


The relations between molecular, crystalline and lamellar structures of amylopectin.
MedLine Citation:
PMID:  23151084     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Chain (branch) length distributions (CLD) from size-exclusion chromatography of a series of waxy starches were parameterized using both an empirical and a biosynthesis-based method and correlated with their crystalline-amorphous lamellar properties obtained from X-ray scattering. Correlations were best seen with the biosynthesis-based parameterization. This showed for the first time that the following links between the CLD and lamellar parameters: the average inter-lamellar repeat distance and the distribution of these distances were decreased by an increase in the proportion of very short branches and were increased by an increase in the proportion of intermediate and longer chains; further, the shoulder and linear sections of the CLD were found to affect the lamellar repeat distance and distribution. These effects are rationalized in terms of branch-length effects on the production of crystallites and the presence of portions of longer branches in the amorphous regions.
Authors:
Torsten Witt; James Doutch; Elliot P Gilbert; Robert G Gilbert
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-14
Journal Detail:
Title:  Biomacromolecules     Volume:  -     ISSN:  1526-4602     ISO Abbreviation:  Biomacromolecules     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100892849     Medline TA:  Biomacromolecules     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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