In this work, films gave values of k around 0.87, similar to the
values reported by Coupland et al. (2000) for whey protein films.
Mu¨ller et al. (2008) related a small variation in the parameter k
when using glycerol and sorbitol at different concentrations in
cassava starch films. The parameter C (Guggenheim constant) gave
important variations. This parameter is related to the first curvature
of the GAB model, with reduced values of water activity, where the
experimental equilibrium moistures showed higher deviations