Fig. 1From: Antioxidant activity and cytotoxicity of Jerusalem artichoke tubers and leaves extract on HaCaT and BJ fibroblast cellsKinetics of the absorbance changes in DPPH• solutions in the presence of various concentrations of ethanolic extract of Helianthus tuberosus L. leaves. Values are mean of three replicate determinations (n = 3)Back to article page