Question

10000 1000- 100- Logo number of survivors Logo D value D value 10- value 1- 0- 100 105 110 115 120 125 Minutes of exposure Temperature (°C) (a) (b) Figure 8.3 The Pattern of Microbial Death. (a) An exponential plot of the survivors versus the minutes of exposure to heating at 12rc. In this example, the value is 1 minute. The data are from table 8.1. (b) An exponential plot of values versus temperature. The temperature change at a given D value that reduces the population by one log unit is known as the Z value. In this example, the Z value is 5°C MICRO INQUIRY Examine graph (a). How long would it take to kill one-half of the original population of microorganisms? Keep in mind that the y axis is exponential.
You are given test tubes to sterilize at 120 oC for 10 minutes. While setting up the autoclave, you make an error and choose the temperature of 110 oC instead. You realize your error and immediately increase the time to 100 minutes. Based on the Figure 8.3b, would this time and temperature combination result in sterilization?

Answer 1

Question

According to the graph present in the question, when autoclave is taken at the temperature of 110 degree Celsius instead of 120,degree Celsius the sterilization not take place at the 110 degree because when we decreases the temperature it lead to the decrease in value of D value which is Z value.