Research on the quality deterioration of UHT milk products during shelf life:core microorganisms and related characteristics  

作　　者：Ruixue Ding Kairu He Rina Wu Mengxue Lou Zhili Liu Yuqiong Piao Xiaoyan Liu Zhishen Mu Junrui Wu 

机构地区：[1]College of Food Science,Shenyang Agricultural University,Shenyang 110866,China [2]Shenyang Key Laboratory of Microbial Fermentation Technology Innovation,Shenyang 110866,China [3]Liaoning Engineering Research Center of Food Fermentation Technology,Shenyang 110866,China [4]Inner Mongolia Mengniu Dairy Grp.Co.,Ltd.,Hohhot 010000,China

出　　处：《Food Science and Human Wellness》2024年第5期2866-2875,共10页食品科学与人类健康（英文）

基　　金：supported by the National Natural Science Foundation of China(32172279,31871831);Shenyang Science and Technology Innovation Platform Project(21-103-0-14,21-104-0-28);Shenyang City Youth Science and Technology Innovation Leading Talent Project(RC200495).

摘　　要：Commercial sterility does not guarantee the sustained stability of ultrahigh temperature(UHT)milk over 6 months shelf life.We explore the microbiota presented in normal(SZ)and quality deteriorated UHT milk(QY and WY)products from the same brand.Based on high-throughput sequencing research results,11 phyla and 54 genera were identified as dominant microbiota.Pseudomonas,Streptococcus,and Acinetobacter as core functional microbiota significantly influenced the UHT milk quality properties.Moreover,principal component analysis(PCA)and multivariate analyses were used to examine the quality characteristics,including 11 physicochemical parameters,10 fatty acids,and 2 enzyme activities,in normal and quality deteriorated UHT milk.We found that the abundance of Pseudomonas increased in quality deteriorated milk(WY)and showed a significant positive correlation with heat-resistant protease content.Acinetobacter in quality deteriorated milk(QY)also considerably contributed to the content of heat-resistant lipase,which resulted in spoilage deterioration of UHT milk.

关 键 词：Ultrahigh temperature(UHT) Quality deterioration High-throughput sequencing Core functional microbiota LIPASE PROTEASE 

分 类 号：TS252.1[轻工技术与工程—农产品加工及贮藏工程]