Figure 1. α,α-Diphenyl-β-picrylhydrazyl (DPPH), 2,2'-azinobis(3-ethylbenzthiazoline-6-sulfonic acid (ABTS), superoxide anion (^*O₂), and hydroxyl radical (^*OH)-scavenging activity of extracts from Coreopsis tinctoria flowering tops. Data are presented as mean ± SD (n = 3). DPPH assay (A); ABTS assay (B); hydroxyl radicals assay (C); superoxide anion radical-scavenging assay (D). EAE, ethyl acetate extract; BE, n-butanol extract; BHA, butylated hydroxyanisole; CTF, Coreopsis tinctoria flowering tops

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Free Radical-scavenging, Nitrite-scavenging, and N-nitrosamine Formation Inhibitory Activities of Extracts from Kunlun Compositae Tea (Coreopsis tinctoria Nutt.)

Xincheng Yao, Ting Zhang, Hui Tang, Heng Wang, Wen Chen

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