As regards mathematical models used to describe inactivation
curves, Weibull model has been extensively used to characterize
the inactivation of pure cultures inoculated in liquid and solid fruit
derivates processed by nonthermal technologies (Guerrero et al.,
2005; Ferrante et al., 2007; Schenk et al., 2008). This model is
based on the hypothesis that resistance to stress of population follows
a Weibull distribution. Peleg and Cole (1998) proposed that
nonlinear survival curves were unlikely the result of mixed populations;
but were due to the cumulative form of a temporal distribution
of lethal events.