高密度二氧化碳对牛初乳的杀菌效果及对理化性质影响

Effects of dense phase carbon dioxide on sterilization and physical-chemical properties of bovine colostrum

摘要: 高密度二氧化碳（DPCD）杀菌技术是目前越来越受关注的非热杀菌技术之一。本文研究了20 MPa、37℃条件下DPCD对牛初乳的杀菌效果。并探讨了经过处理后牛初乳粒度、黏度、色泽、pH值等的变化。结果表明在20 MPa、37℃的DPCD处理30 min以上条件能较好地杀灭牛初乳中的细菌，同时牛初乳发生了色泽变亮、粒度增大、黏度和pH值均降低等变化。

Abstract: Dense Phase Carbon Dioxide (DPCD) sterilization technology is one of the more and more popular non-thermal sterilization technologies. The effect of DPCD (20 MPa, 37℃) on sterilization of bovine colostrum was investigated. The changes of particle size, viscosity, colour and pH value of bovine colostrum were also been discussed. The results indicated that the bacteria in the bovine colostrum could be effectively sterilized by DPCD at 20 MPa and 37℃ for more than 30 min, the bovine colostrum became brighter, and its particle size increased, but its viscosity and pH value decreased.