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Survivor Curve Of Sterilization. The logarithmic nature of the survivor or destruction curve indicates that complete destruction of the microbial population is not a theoretical possibility since a decimal fraction of the population should remain even after an infinite number of D values. The survivor curve D-value method measures the number of surviving spores after a sterilization insult. The D-value time to reduce the microbial population by. The severe heat treatment during sterilization produces substantial changes in nutritional and sensory qualities of foods.
It is not able to detect less than 30. A death rate curve or survivor curve. The severe heat treatment during sterilization produces substantial changes in nutritional and sensory qualities of foods. Survivor curve Death Curve D Value Z Value F Value Sensitivity. The linearity of the curve implies that the value of the exponent n is 1 or very close to 1. The data indicate that the survival curves for liquid chemical sterilants may not exhibit log-linear kinetics and the shape of the survivor curve may vary depending of the formulation chemical nature and stability of the liquid chemical sterilant.
The logarithmic nature of the survivor or destruction curve indicates that complete destruction of the microbial population is not a theoretical possibility since a decimal fraction of the population should remain even after an infinite number of D values.
The survivor curve construction is performed by counting microbiologic survivors in terms of colony-forming units recovered after exposing the microbiologic population to sublethal sterilizing cycles of graded exposures of EO with all other parameters except time remaining constant. Sterilization Criteria. The BBS method is defined as a sterilization process with. 1 For the purpose of this discussion a D121 value of 20 minutes and a sterilization temperature of 121C 250F is used. The survivor curve construction is performed by counting microbiologic survivors in terms of colony-forming units recovered after exposing the microbiologic population to sublethal sterilizing cycles of graded exposures of EO with all other parameters except time remaining constant. The slope of this line represents the resistance of the microorganism to the sterilization process.