摘要
研究的主要目的是筛选出能够在发酵羊乳后高产抗氧化肽的乳杆菌菌株。以DPPH自由基清除率、酸度以及p H值作为检测指标,从25株菌株中筛选出目的菌株。结果表明,25株菌株均具有产抗氧化肽能力,以Trolox的抗氧化性为参照,筛选出4株发酵羊乳具有较高DPPH自由基清除率的菌株,分别为植物乳杆菌L60、干酪乳杆菌L49及L61、嗜酸乳杆菌LA5。其发酵羊乳的DPPH自由基清除率分别为69.14%、65.01%、61.34%及56.36%,酸度分别为68、68.8、102.4、72.4 oT,p H值分别为4.80、4.43、4.16、4.42。
This study mainly aimed to screen the probiotic Lactobacillus with high antioxidant ability during the fermentation of goat milk. The strains were selected from 25 strains by the DPPH radical scavenging activity, acidity and p H. The results showed that all the strains had antioxidant ability and 4 strains were screened due to their high scavenging rate of DPPH radical taking Trolox for reference. They were L. plantarum L60, L. casei L49 and L61, L. acidophilus LA5. In vitro experiments, the DPPH radical scavenging rate of fermented goat milk by the 4 Lactobacillus strains reached to 69.14%, 65.01%, 61.34% and 56.36%, respectively. The acidity and p H of them were 68, 68.8, 102.4, 72.4 oT and 4.80, 4.43, 4.16, 4.42, respectively.
作者
曹吉利
谭源
惠翌昕
陈合
舒国伟
CAO Ji-li;TAN Yuan;HUI Yi-xin;CHEN He;SHU Guo-wei(Xi＇an Oriental Dairy Co., Ltd., Xi＇an 710006;School of Food and Biology Engineering Shaanxi University of Science and Technology, Xi＇an 710021)
出处
《食品科技》
CAS
北大核心
2017年第12期6-10,共5页
Food Science and Technology
基金
西安市科技计划项目[XJR1506-(10)]
西安市灞桥区科技项目(2016-(7))
关键词
抗氧化性
益生乳杆菌
羊乳
发酵
antioxidant activity
probiotic Lactobacillus
goat milk
fermentation
