吴关威1，孙合群1，彭进明2，彭颖1*
（1 安琪酵母股份有限公司，湖北 宜昌 443003；2 仲恺农业工程学院轻工食品学院，广东 广州 528303）
摘要：通过对酵母膳食纤维的成分分析可知：酵母膳食纤维含有较多的酵母甘露寡糖和酵母β-葡聚糖，含量分别为43.0%和30.6%。另外，酵母膳食纤维还含有较少的水分、10.1%的肽和1.4%的游离氨基酸。其中，酵母葡聚糖的分子量主要分布在7～200 万Da，此区间分子量的葡聚糖含量占总量的89.57%。肽分子量主要分布在400Da以下，含量占85.85%。经过实验可知，酵母膳食纤维具有较好的体外抗氧化性：在125mg/mL 浓度下，DPPH 和ABTS 的清除率分别为46.5%和86.5%。
关键词：酵母膳食纤维；酵母葡聚糖；酵母甘露寡糖；体外抗氧化活性
Composition Analysis and Antioxidant Activity of Yeast Dietary Fiber in Vitro
WU Guan-wei1，SUN He-qun1，PENG Jin-ming2，PENG Ying1*
（1 Angel Yeast Co.，Ltd.，Yichang 443003，China；2 Zhongkai University of Agriculture and Engineering Light Industry Food College，Guangzhou 528303 China）
Abstract: According to the composition analysis of yeast dietary fiber，yeast dietary fiber contains more yeastmannan oligosaccharides and yeast β- glucan. The content was 43.0% and 30.6%，respectively. In addition，yeastdietary fiber contains less water，10.1% peptide and 1.4% free amino acid. Among them，the molecular weight ofyeast glucan mainly distributed in 70，000 Da to 2million Da，the molecular weight of glucan in this range accountedfor 89.57% of the total. The molecular weight of peptide was mainly distributed below 400Da，accounting for85.85% . The results showed that yeast dietary fiber had good antioxidant activity in vitro. At 125mg/mL，thescavenging rates of DPPH and ABTS were 46.5% and 86.5%，respectively.
Key words: yeast dietary fiber；yeast dextran；yeast mannose oligosaccharides；antioxidant activity in vitro
中图分类号：TQ920 文献标志码：A 文章编号：1007-7871（2022）04-0007-03
2022，Vol.25，No.4