食品科学2017，Vol.38Issue(23)：14-19,6.DOI:10.7506/spkx1002-6630-201723003
米糠水溶性膳食纤维理化特性及抗氧化性
Physicochemical Properties and Antioxidant Activity of Water-Soluble Dietary Fiber from Rice Bran
摘要
Abstract
This study evaluated the physicochemical and functional properties of water-soluble dietary fiber (SDF) prepared by ultrasonic-assisted cellulase hydrolysis of defatted rice bran. The SDF, with a high purity of (79.52 ± 0.07)%, had low protein and ash contents of (7.82 ± 0.13)% and (5.71 ± 0.11)%, respectively. The SDF had good physical and chemical properties; its water-holding capacity was (3.16 ± 0.15) g/g, oil-holding capacity (0.99 ± 0.08) g/g, swelling capacity (1.39 ± 0.12) mL/g, and water-binding capacity (4.18 ± 0.10) g/g. It was also found that the SDF had cation exchange capacity, and its solubility was positively proportional to temperature. Fourier transform infrared spectral analysis indicated the presence of some associated hydrogen bond in the SDF. Scanning electron microscopic analysis confirmed its high purity. Furthermore, the SDF exhibited strong antioxidant capacity in a concentration-dependent manner, which was determined to be 20.27% and 58.97% in the scavenging of 1,1-diphenyl-2-picrylhydrazyl and 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) radicals at 10 mg/mL, respectively.关键词
米糠/水溶性膳食纤维/理化特性/抗氧化活性Key words
rice bran/water-soluble dietary fiber/physicochemical properties/antioxidant activity分类
轻工纺织引用本文复制引用
黄萍,林亲录,朱凤霞,王玉倩,崔校基,梁盈..米糠水溶性膳食纤维理化特性及抗氧化性[J].食品科学,2017,38(23):14-19,6.基金项目
国家自然科学基金青年科学基金项目(31201348) （31201348）
国家自然科学基金面上项目(31571874) （31571874）
湖南省自然科学基金面上项目(2017JJ2410) （2017JJ2410）
2016湖湘青年科技创新人才项目(2016RS3033) （2016RS3033）
粮油深加工与品质控制2011湖南省协同创新项目 （）
中南林业科技大学研究生教材建设项目(2015JC03) （2015JC03）
