The linear behavior was confirmed by fitting the experimental
drying kinetics, at t > 1 h, to a linear model in semi-log scale,
which results in the continuous lines plotted in Figs. 4–8. The
slopes of these lines ðm) and their 95% interval confidence limits
(calculated with Eq. (17)) were applied in Eq. (15) jointly with their
characteristic length ðl ¼ lz) listed in Table 1, for the calculation of
average diffusivities, and their confidence interval. The whole set
of the results are listed in Table 3.