Survival Curves of Bacilli Spores with an Activation Shoulder

activation parameters

a

1.

b (min)

5.

inactivation parameters

t

c

(min)

50.

m

1.5

time axis maximum

200.

log survival axis minimum

-6.

This Demonstration simulates and plots realistic survival curves of heat-treated Bacilli spores, at least some of which can be dormant and activated by high temperature. It is based on a purely phenomenological empirical model that accounts for activation and inactivation separately. The activation accounts for the finite number of dormant spores while inactivation accounts for either log-linear or non-log-linear survival kinetics.