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Scavenging activities of the cell-free supernatants of (a) P. rubra and (b) P. xiamenensis determined by DPPH assays for two types of media after 12, 24, 48, and 72 h of culturing (mean ± standard deviation, n = 3). Asterisks indicate a significant mean difference between the test groups by medium (analysis of variance, p < 0.05).
