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FTIR analysis of SEO-loaded gelatin films. (A) Porcine-based films: Po1: Po-control; Po2: Po-SEO (0.05% v/v); Po3: Po-SEO (0.075% v/v); Po4: Po-SEO (0.1% v/v). (B) Bovine-based edible films: Bo1: Bo-control; Bo2: Bo-SEO (0.05% v/v); Bo3: Bo-SEO (0.075% v/v); Bo4: Bo-SEO (0.1% v/v).
