Fig. 3From: Phytoestrogen (+)-pinoresinol exerts antitumor activity in breast cancer cells with different oestrogen receptor statusesDPPH radical scavenging assay. Antioxidant activity of (+)-pinoresinol a against DPPH radicals at 0.03, 0.06, 0.13, 0.25, 0.5, 1 and 2 mole ratios (mol antioxidant/mol DPPH). α-tocopherol b was used as the antioxidant control at the same ratios. Data represents the absorbance of DPPH radicals read at 520 nm for 2 h. Each experiment was performed in triplicate and repeated three timesBack to article page