酸奶中乳酸菌的分离、鉴定及性能研究

为给酸奶生产的菌种筛选奠定研究基础,本文对酸奶中乳酸菌的分离、鉴定及其性能进行了研究.按GB 4789.35—2016中的方法分离酸奶中的乳酸菌,采用表型特征鉴定、生理生化鉴定及分子学鉴定对分离菌种进行确认,通过凝固试验和产酸试验相结合研究菌种性能.实验结果表明,从酸奶中分离出2株菌种,经鉴定分别为德氏乳杆菌保加利亚亚...

Study on Isolation,Identification and Performance of Lactic Acid Bacteria in Yogurt

In order to lay the foundation for the research of strain screening for yogurt production,this paper studies the isolation,identification and performance of lactic acid bacteria in yogurt.According to the method in GB 4789.35—2016,the lactic acid bacteria in the yogurt were separated,and the phenotypic characterization,physiological and biochemical identification and molecular identification were used to confirm the isolated bacteria,and the performance of the bacteria was studied through the combination of coagulation test and acid production test.The experimental results showed that two strains were isolated from yogurt,and they were identified as Lactobacillus bulgaricus and Streptococcus thermophilus,and the two strains performed better.