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).
Jiménez-Estrada et al. BMC Complementary and Alternative Medicine 2013 13:12 doi:10.1186/1472-6882-13-12