Percentage inhibition of monkey kidney cells lines maintained in culture for one day before exposure to Euphorbia hirta extracts for 5 days1. 1. Percentage inhibition of potassium cyanide (KCN) at 103 μg/ml = 131%; the optical density (OD) values for: 1% DMSO (solvent control) = 0.069, cells cultured in plain culture medium = 0.093, and for heat killed cells = −0.015 (negative figures imply promotion of cell maintenance).
Attah et al. BMC Complementary and Alternative Medicine 2013 13:66 doi:10.1186/1472-6882-13-66