A PROBIT METHOD TO INTERPRET THERMAL INACTIVATION OF BACTERIAL SPORES

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Abstract
An experimental example of the use of probits for interpolating and extrapolating heat-inactivation of bacterial spores is presented. Data are reported for Bacillus anthracis and B. subtilis var. niger. This method has the advantages of linearity and parallelism over the conventional methods of log of percentage survival versus time, or Q10 plots. Both simple graphic and regression equation methods are given, and should be of value to workers in this field.