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(a) 2, 2-diphenyl-1- picrylhydrazyl (DPPH) radical scavenging activity, and (b) ferric ion scavenging activity of Ocimum tenuiflorum extract and Ag@Se NPs compared to ascorbic acid. Data are presented as mean ± SD (n = 3). * p < 0.05 for statistical significance compared to standard antioxidant (ascorbic acid).
