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%-RSA of curcumin-loaded films evaluated by the DPPH method. (a–c) UV–vis spectra (baseline corrected) of DPPH + films: (a) reference, (b) film with 50 wt % oil content, and (c) film with 86 wt % oil content. (d) Reduction in scavenging activity as a function of oil content in films loaded with curcumin.
