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2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (a) and antioxidant activity in the β-carotene-linoleic acid emulsion (b) of olive leaf extracts. Data are expressed as mean ± standard deviation (n = 4) for extract of each genotype. Bars having different letters differ significantly (p < 0.05).
