Figure 1From: In vitro antioxidant and antiproliferative activities of plants of the ethnopharmacopeia from northwest of Mexico Radical scavenging activity in the DPPH assay of Krameria erecta , Struthanthus palmeri , Phoradendron californicum , Senna covesii and Stegnosperma halimifolium methanolic extracts. Trolox was used as control. The bars represent the standard deviation (mean ± SD; n = 3). Significant differences (p < 0.05) are indicated by different letters (a–c).Back to article page