가열성균의 동력학적연구

Studies on the Kinetics of the Heat Sterilization

The destruction rate of microorganisms by heat follows the first order reaction. In this experiments, the calculated sterilization velocity constants of Escherichia Coli are 1.97 X 10-2min-1. (45oC), 9.53 X 10-2min-1. (50oC), 4.77 X 10-1min-1. (55oC) and 1.858min-1.(60oC); that of Bacillus Subtilis are 6.33 X 10-3min-1.(60oC), 1.41 X 10-2min-1.(70oC), 2.89 X 1010-2min-1.(80oC), 1.32 X 10-1min-1.(90oC), 2.87 X 10-1min-1. (95oC), 7.91 X 10-1min-1.(100oC) and 1.777min-1.(105oC). In the results, the activation energy of E. Coli is 62.0 Cal mole-1.(45oC-60oC), that of B. Subtilis are 17.8Cal mole-1(60oC-80oC) and 47.1 Cal mole-1(90oC-105oC)