食品科学 ›› 2007, Vol. 28 ›› Issue (1): 73-76.

• 基础研究 • 上一篇    下一篇

高压处理对鲜牛乳中枯草杆菌芽孢致死效应的研究

 德力格尔桑, 王英利, 阿拉达日图, 玛丽娜   

  1. 内蒙古农业大学食品科学与工程学院; 内蒙古农业大学生物工程学院 内蒙古呼和浩特010018; 内蒙古呼和浩特010018;
  • 出版日期:2007-01-15 发布日期:2011-12-31

Study on Germination and Inactivation of B.subtilis Spores in Fresh Milk by Oscillatory and Pulsed Ultra High Pressure

 DE  Li-Ge-尔Sang, WANG  Ying-Li, A  La-Da-Ri-Tu, MA  Li-Na   

  1. 1.College of Food Science and Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China; 2.College of Bioengineering, Inner Mongolia Agricultural University, Huhhot 010018, China
  • Online:2007-01-15 Published:2011-12-31

摘要: 采用压力、时间、循环处理次数相结合的方法,在较低的温度下,对鲜乳中枯草杆菌芽孢激活及致死效应进行了研究。在40℃条件下,200MPa低压处理5min,停压1min,再升至700MPa下处理5min,循环处理7次,可将鲜乳中枯草杆菌芽孢数减少到102~103cells/ml。

关键词: 超高压处理, 枯草杆菌芽孢, 芽孢萌发, 芽孢致死

Abstract: A method of germinating and sterilizing B.Subtilis spores with minimal heating was studied by the combined effect of oscillatory and pulsed UHP, pressurization times, and with certain operations cycles. The condition above room temperature was benefit to UHP sterilization. At 40℃, seven pressurization cycles with the first pressure at 200MPa for 5min, followed by an ambient pressure pause for 1min, then another 700MPa pressurization for 5min, decreases the spores count from 107 to 102~ 103cells/ml.

Key words: ultra high oressure(UHP), B.Subtilis spores, spore germination, spore inactivation