Release kinetics studies, were conducted in order to observeeventual differences in the profiles, as a function of the polymericmatrix. Fig. 4 shows the in vitro release behavior of Ls by CH and CH–CG beads, loaded with Ls. In the first two hours, in vitro releasewas similar for CH and CH–CG beads. After 24 h, it is observed thatCH beads showed faster release than CH–CG beads, with 67±9% and37±5% of released oil for CH and CH–CG beads, respectively. Forswellable polymeric matrix systems, such as to those described inprevious works [14,15], the Eq. (5) is valid