The application of gelatin-, chitosan- and glycerol-based biopolymers
effectively decreased theweight loss, lipid oxidation and discoloration
of coated steaks during 5 days of retail display, thus increasing the
beef display-life. Response surface methodologywas useful for optimizing
the biopolymer blend, and based on the predicted models, the best
concentrations for film formation were between 3% and 6% gelatin,
between 0.5% and 1.0% chitosan and 6% glycerol (based on dry gelatin+
chitosan weight).