Comparison the Structural, Physicochemical, and Prebiotic Properties of Litchi Pomace Dietary Fibers before and after Modification

食品科学 成分 化学 膨胀能力 膳食纤维 膳食纤维 阿拉伯糖 益生元 纤维 吸水率 功能性食品 多糖 木糖 生物化学 肿胀 的 植物 化学工程 有机化学 发酵 生物 工程类
作者
Yina Li,Yuanshan Yu,Jijun Wu,Yujuan Xu,Gengsheng Xiao,Lu Li,Haoran Liu
出处
期刊:Foods [MDPI AG]
卷期号:11 (3): 248-248 被引量:25
标识
DOI:10.3390/foods11030248
摘要

Litchi pomace, a by-product of litchi processing, is rich in dietary fiber. Soluble and insoluble dietary fibers were extracted from litchi pomace, and insoluble dietary fiber was modified by ultrasonic enzymatic treatment to obtain modified soluble and insoluble dietary fibers. The structural, physicochemical, and functional properties of the dietary fiber samples were evaluated and compared. It was found that all dietary fiber samples displayed typical polysaccharide absorption spectra, with arabinose being the most abundant monosaccharide component. Soluble dietary fibers from litchi pomace were morphologically fragmented and relatively smooth, with relatively high swelling capacity, whereas the insoluble dietary fibers possessed wrinkles and porous structures on the surface, as well as higher water holding capacity. Additionally, soluble dietary fiber content of litchi pomace was successfully increased by 6.32 ± 0.14% after ultrasonic enzymatic modification, and its arabinose content and apparent viscosity were also significantly increased. Further, the soluble dietary fibers exhibited superior radical scavenging ability and significantly stimulated the growth of probiotic bacterial species. Taken together, this study suggested that dietary fiber from litchi pomace could be a promising ingredient for functional foods industry.
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