Either glycerol or lactic acid as plasticizer and, optionally, starch may also be blended with {HEAD ~ either the pectin} or {TAIL ~ chitosan solutions} used for film preparation 
Either glycerol or lactic acid as plasticizer and , optionally , starch may also be blended with { HEAD ~ either the pectin } or { TAIL ~ chitosan solutions } used for film preparation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH