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Evaluation of oat bran as a soluble fibre source. Characterization of oat β-glucan and its effects on glycaemic

日期:2023-04-09 编辑:三友汇智

Evaluation of oat bran as a soluble fibre source. Characterization of oat β-glucan and its effects on glycaemic response 

Abstract 

Oat β-glucan, present in oat bran in greater concentrations than in the whole oat groat, is mainly composed of β-(1 → 3)-linked cellotriosyl and cellotetraosyl units, present at 52 and 34% by weight of the molecule, respectively. The remaining structure consits of β-(1 → 3)-linked blocks composed of four or more consecutive β-(1 → 4)-linked  -glucopyranosyl units. Size-exclusion chromatography indicated a molecular weight for oat β-glucan of 2–3 × 106. This was significantly reduced during digestion in the small intestine of rats and chicks. In healthy human volunteers, oat β-glucan reduced the postprandial glucose response to an oral glucose load similarly to guar gum. The effectiveness of oat β-glucan was proportional to the logarithm of the viscosity of the solution fed. 


Peter J. Wood. Centre for Food and Animal Research, Agriculture Canada, Ottawa, ON K1A 0C6, Canada 
Received 30 March 1994;  revised 1 September 1994;  accepted 5 September 1994 ; Available online 23 April 2003. 
Carbohydrate Polymers .Volume 25, Issue 4, 1994, Pages 331-336