A complete lack of extract activity was only observed against R. arrhizus. Fungus inhibition by those films with SH extracts was not observed, probably due to the overly slow and inadequate SH extract diffusion. Extract release from the film matrix is gradual and then the fungi, due to their rich enzyme systems, may decompose bioactive compounds which are in low concentrations in the environment. This was confirmed in the study conducted by Oosterhaven et al. (1995),