复合乳酸菌发酵怀山药工艺及其抗氧化活性  

Optimization of fermentation process of Chinese yam by compound lactic acid bacteria and its antioxidant activity

作　　者：郑苗[1] 何佳[1] 吕丹丹[1] 宋文华 张雪雯 

机构地区：[1]河南科技大学食品与生物工程学院洛阳市微生物发酵工程技术研究中心河南科技大学微生物资源开发与利用重点实验室,河南洛阳471023

出　　处：《中国酿造》2018年第2期106-110,共5页China Brewing

基　　金：河南省产学研合作项目(142107000095);大学生研究训练计划项目(2016071)

摘　　要：该试验利用单因素试验和响应面试验对复合乳酸菌发酵怀山药的工艺进行了优化,并以羟基自由基、超氧自由基、DPPH自由基清除率和还原力为评价指标,研究发酵液的抗氧化活性。结果表明,最佳发酵条件为发酵时间23 h、发酵温度38℃、接种量3%,此条件下乳酸含量最高,为1.42%;怀山药酶解发酵液对羟基自由基、超氧自由基、DPPH自由基清除率分别为99.95%、94.45%、89.65%,较发酵前均有不同程度的提高;还原力提高了0.085。The fermentation process of Chinese yam by compound lactic acid bacteria was optimized by single factor experiments and response sur-face experiments. Using the scavenging rate of hydroxyl radical, superoxide radical, DPPH free radical and the reducing power as the evaluation in-dexes, the antioxidant activity of fermentation broth was researched. The results showed that the optimum fermentation conditions were fermentation time 23 h, temperature 38 V., inoculum 3%. Under the conditions, lactic acid content was the highest of 1.42%. The scavenging rate of Chinese yam fermentation broth on hydroxyl radical, superoxide radical and DPPH free radical were 99.95%, 94.45% and 89.65%, respectively, which were higher than that of before fermentation. The reducing power increased by 0.085.

关 键 词：怀山药 复合乳酸菌 发酵 响应面法 抗氧化活性 

分 类 号：TS215[轻工技术与工程—粮食、油脂及植物蛋白工程]