mulations investigated was not observed (P > 0.05,ANOVA). An increase in the number of the study may
lead to a better comparison of profile. In the blended
chitosan-tapioca starch patch, the di¡ffrent concentration ratios of the polymers did not affect the cumulative tartaric acid permeated. Again, these obtained
results were corresponding to the low porosity of the
blended chitosan-tapioca starch patches