Document Detail

Structure and in vitro digestibility of normal corn starch: effect of acid treatment, autoclaving, and beta-amylolysis.
MedLine Citation:
PMID:  20684536     Owner:  NLM     Status:  MEDLINE    
The goal of this study was to explore a new strategy to reduce the digestibility of normal corn starch (NCS). NCS was treated using 1.0% hydrogen chloride at 55 degrees C. After neutralization and desalting, starches were adjusted to 35% moisture content and subjected to autoclaving. Thereafter, starches were subjected to beta-amylolysis. At different stages, starches were characterized for chain length distribution, ordered structure including the crystalline pattern, and in vitro digestibility. The results showed that acid treatment reduced amylose molecular weight and increased the thermal resistance of A-type crystallites. V-type crystallites promoted by autoclaving were increased by acid treatment, suggesting the beneficial effect of reduced amylose molecular weight on crystallization. beta-Amylolysis had minor impact on the crystalline pattern; however, it significantly reduced the in vitro digestibility of starch by enriching linear chains. At higher levels of acid treatment, the effect of beta-amylolysis was more pronounced.
Wei Song; Srinivas Janaswamy; Yuan Yao
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  58     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-02     Completed Date:  2010-12-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9753-8     Citation Subset:  IM    
Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, Indiana 47907-2009, USA.
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MeSH Terms
Amyloid beta-Peptides / metabolism*
Molecular Structure
Starch / chemistry*
Zea mays / chemistry*
Reg. No./Substance:
0/Amyloid beta-Peptides; 9005-25-8/Starch

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