The antioxidant capacity of biodegradable films with differ-ent concentrations of CGand CFwas determined using the DPPHmethod and expressed as DPPH radical scavenging capacity (I)(Table 2). The effects of CGand CFare illustrated in the responsegraph (Fig. 1). This assay is based on the reduction of DPPH, a stableorganic nitrogen radical that reacts with the antioxidant sample