Study on Isolation and Chemical Compositions of Soluble Dietary Fiber in Beer’s Spent Grains

Abstract

Abstract: Tht beer’s spent grains contained 58.7%(w/w,dry base)dietary fibers,23.0% soluble dietary fibers(SDF),13.6% soluble pentosans and 30.4% β-glucan.We obtained 16.5%(w/w,db)SDF from it by adding ethanol to precipitate SDF.Adding papain and α-amylase to enzymolysis protein and starch and increasing temperature of extracting liquid could all increase the rate of isolated SDF.SDF was composed mainly of xylose(60.44%)and arabinose(34.45%).And the ratio of arabinose to xylose was 0.57.Concentration of β-glucan,mannose and galactose in SDF was 12.01%,1.16%and3.35%respectively.

Key words: Beer’s spent grains , Dietary fiber , Pentosans, Isolate process

WANG Jin-Hua, ZHANG Sheng-Hua. Study on Isolation and Chemical Compositions of Soluble Dietary Fiber in Beer’s Spent Grains[J]. FOOD SCIENCE, 2002, 23(12): 64-67.

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Study on Isolation and Chemical Compositions of Soluble Dietary Fiber in Beer’s Spent Grains

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