Fig. 2From: Effects of phenolic constituents of daylily flowers on corticosterone- and glutamate-treated PC12 cellsEffects of Hemerocallis citrina extract and fractions (a-f) on corticosterone (Cort) -induced cytotoxicity of PC12 cells determined by MTT assay (mean ± SD, n = 5). ##P < 0.01 as compared with control group; *P < 0.05 and **P < 0.01 as compared with the corticosterone groupBack to article page