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Attenuated Total Reflection–Fourier Transform Infrared (ATR-FTIR) spectra of different layers of whey-based laminate film structure is shown in (a); IR spectra of pristine, extracts, chitosan and the modified whey-based laminate film for the 2%CS+CSNPs CIN is shown in (b); and the whey-based laminate film with the deposited 2%CS+CSNPs ROS is shown in (c).
