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Changes in ascorbic acid (a), total phenol (b), and antioxidant activities (FRAP (c) and DPPH (d)) in tomato fruits as affected by ripening stages. Vertical bars represent mean ± SD of three replicates, and the different letters within the same cultivars indicate statistically significant differences at p < 0.05 by Duncan's multiple range test. FRAP: ferric-reducing antioxidant power, DPPH: 2,2,-diphenyl-1-picrylhydrazyl.
