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SEM images of biogenic ZnO NPs in the presence of aqueous extracts of leaves (A) and fruits (B). The comparative DPPH scavenging antioxidant activity of control and ZnO NPs from (C) leaf and (D) fruit extracts of C. colocynthis. The mean ± SD is expressed as */#p < 0.05, **p < 0.01. Modified from (Kiani et al., 2023) CC BY license.
