Fig. 7From: Photodynamic apoptosis and antioxidant activities of Brassica napus extracts in U937 and SK-HEP-1 cellsAntioxidant activity of sequential solvent extracts from B. napus. Antioxidant activity was evaluated by measuring reduction in DPPH radical detected at 517 nm. Vitamin C was used as a positive control. Results are expressed as the mean ± SD of three independent experimentsBack to article page