Discussion
The time required for stipulated destruction of a microbial population at a given temperature is
Answer: B
The time is the F-value.
The F-value is the time, at a stated temperature, needed to achieve a specified (stipulated) destruction of a microbial population, for example the 12-log reduction of Clostridium botulinum spores used for low-acid canned foods. It is usually quoted at a reference temperature, \(F_{0}\) at 121.1°C.
The D-value is the time for one tenfold (90%) reduction only, not an arbitrary stipulated destruction. The z-value is the temperature change that alters the D-value tenfold, a temperature, not a time. Q10 is the factor by which a reaction rate changes for a 10°C rise.
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