Consider the following heat penetration results for corn in cans processed for 45 minutes, where target temperature of the retort (Tr) was 250°F.
Time(minutes) Temperature, Tc(°F)
0 (to 5) 175.0
5 (to 10) 205.0
10 (to 15) 224.2
15 (to 20) 235.5
20 (to 25) 241.7
25 (to 30) 245.3
30 (to 35) 247.3
35 (to 40) 208.0
40 (to 45) 128.0
a. Find the overall process lethality using the Improved General Method with lethal rates determinedfor a reference organism with z = 18 °F; express your final answer in correct F-value notation.
b. Calculate the overall process lethality if the initial temperature increases to 200°F
c. Calculate the overall process lethality if the retort temperature change to 245°F