Fig. 1From: Nitric oxide induced by Indian ginseng root extract inhibits Infectious Bursal Disease virus in chicken embryo fibroblasts in vitroSodium nitrite standard curve for determination of nitric oxide concentration. Standard curve for determining and expressing nitric oxide concentrations was derived using solutions of known concentration of sodium nitrite. Each concentration of sodium nitrite was assayed thrice independently, and the mean of the three observations was used to obtain the standard curveBack to article page