Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Physiological Responses of Bacillus amyloliquefaciens Spores to High Pressure

  • Ahn, Ju-Hee (Division of Biomaterials Engineering, Kangwon National University) ;
  • Balasubramaniam, V.M. (Department of Food Science and Technology, The Ohio State University)
  • Published : 2007.03.31
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Abstract

Pressure inactivation behavior of Bacillus amyloliquefaciens spores was investigated in deionized water. The spores of B. amyloliquefaciens were subjected to $105^{\circ}C$ and 700 MPa. The magnitude of the decrease in viability after pressure treatment was similar to that after pressure treatment followed by heat shock. The increase of dipicolinic acid (DPA) release was correlated with the spore inactivation, and the hydrophobicity did not significantly change during the pressure-assisted thermal processing (PATP). Lag phase duration increased with increasing pressure process time. The mechanisms of spore germination and inactivation during the PATP were related to a complex physiological process.

Keywords

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