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(A) Total antioxidant activity of synthesized CuNPs as compared with ascorbic acid as a standard antioxidant. (B) 1,1-diphenyl-2-picryl-hydrazyl free radical scavenging activity of different concentration of CuNPs. Data are presented as the mean ± standard deviation. CuNPs, copper nanoparticles; OD, optical density.
