FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (2): 38-42.

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Dynamic Damage Mechanism on Microbiology’s Structure and Pasteurization

 DING  Wen-Bo, ZHANG  Shao-Ying   

  1. College of Food Science and Nutritional Engineering, China Agriculture University
  • Online:2005-02-15 Published:2011-09-19

Abstract: The relationship between dynamic damage and life activity of Bacillus subtilis was studied. The results showed: (1) Submicroscopic structure damage caused by dynamic actions could make the bacteria lose life. (2) Lower dynamic actions could make the Bacillus subtilis completely-break and its submicroscopic structure fatally damage. (3) The effects of micro-hole valve of homogenizer on bacteria’s surface structure showed cell wall friction damage and cell membrane breakage. (4) The whole- breakage of bacteria need many times repeatedly handling with high dynamic action though the breakage and death caused by submicroscopic damage could occur in rather low dynamic action. The mechanism of submicroscopic structure to cause fatal damage should need further. (5) The effect of dynamic action on bacteria’s inner-structure should need further observing cell’s super fine slices through Transmission Electron Microscope study.

Key words: Bacillus subtilis, cell’s structure, high pressure homogenization, dynamic damage, life activity