Document Detail

Digestion residues of typical and high-beta-glucan oat flours provide substrates for in vitro fermentation.
MedLine Citation:
PMID:  17550267     Owner:  NLM     Status:  MEDLINE    
In vitro fermentabilities of the oat flour digestion residues (ODR) from two commercial oat lines with 4.7 and 5.3% beta-glucan and from two high-beta-glucan experimental lines with 7.6 and 8.1% beta-glucan were evaluated and compared with fermentations of lactulose, purified oat beta-glucan (POBG), and purified oat starch (POS). Substrates were fermented by using an in vitro batch fermentation system under anaerobic conditions for 24 h. The progress of the fermentation was studied by following the change in pH of the fermentation medium, production of short-chain fatty acids (SCFA) and gases, and consumption of carbohydrates. The substrate from the flour with the greatest amount of beta-glucan tended to have the greatest pH decline and the greatest total SCFA production. A significant correlation occurred between gas production and SCFA formation (R 2 = 0.89-0.99). Acetate was produced in the greatest amounts by all of the substrates except POBG, by which butyrate was produced in the greatest amount. More propionate and butyrate, but less acetate, were produced from high-beta-glucan ODR. With the given fermentation conditions, >80% of the total carbohydrate was depleted by the bacteria after 24 h. Glucose was the most rapidly consumed carbohydrate among other available monosaccharides in the fermentation medium. Overall, the high-beta-glucan experimental lines provided the best conditions for optimal in vitro gut fermentations.
Sedat Sayar; Jean-Luc Jannink; Pamela J White
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-06-06
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  55     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-20     Completed Date:  2007-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5306-11     Citation Subset:  IM    
Department of Food Science and Human Nutrition and Department of Agronomy, Iowa State University, Ames, Iowa 50011, USA.
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MeSH Terms
Avena sativa / chemistry*
Fatty Acids / metabolism
Flour / analysis*
Seeds / chemistry,  metabolism
beta-Glucans / analysis*
Reg. No./Substance:
0/Fatty Acids; 0/beta-Glucans

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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