At long times, more than three hours at 110 1C, the
average value of a
f obtained was 4.53. Although for all the
runs the sterilizing value at heating was of 5 min, total
sterilizing values at a retort temperature of 130 1C almost
doubled the total sterilizing values at 120 1C, but surface
color was greater at 130 1C, because heating and cooling
times were lower (means of a* values at 130 1C were
statistically different to those at 120 1C); better color
quality of green peas may be obtained working at higher
temperatures-shorter times during end-over-end sterilization
In order to determine the kinetic parameters, it was
necessary to assume a pair of values of k100 1C and Ea to
start with the iterations; the values of k100 1C ¼
8.57104 s1 and Ea ¼ 52.4 kJ mol1 given by Smout
et al. (2003) for a value were adopted. Table 3 shows the