sensitive to deterioration at low temperatures (chilling injury). This dif-
ference in behavior is reflected in the equation by the sum of reaction
rate constants in the denominator where Nstands for the number of
processes involved (or the number of attributes that can be limiting).
These reaction rate constants again depend on temperature according to
Arrhenius’ law (Equation (7.3)).
In Figure 7.8 an example is given for the behavior of keeping qual-
ity for paprika (bell pepper) at constant storage conditions. The two tem-
perature-driven processes can clearly be seen. A discrete change in
quality limit constitutes an instantaneous change of the numerator in
Equation (7.5), but still depends on temperature by the sum of reaction
rate constants in the denominator. Temperature not only has an effect
on keeping quality itself, changes in temperature also affect the impor-
tance of a change in quality limit. From Figure 7.7 it can be seen that
the effect on keeping quality exerted by a changing quality limit is dif-
ferent for each temperature. The slower the processes of quality decay
Examples of Modeling Accetability 137FIGURE 7.8Keeping quality of bell peppers as a function of constant storage tem-
perature.