247054.fig.001a
(a)
247054.fig.001b
(b)
Figure 1: Effect of different concentrations of Nigella sativa extract (2, 4, 6, 8, 10, and 14 mg/mL) on PE (  M) (a) and KCl (  M) (b) precontracted rat aortic rings with (+E) or without (−E) endothelium. Data are expressed as mean ± S.E.M. ( ). , compared to base.