Figure 2From: Menthol-enhanced cytotoxicity of cigarette smoke demonstrated in two bioassay modelsEffect of cigarette smoke on cell death induction in tobacco plant Bel-W3 cells. Typical images of vital staining before (a) and after (b) exposure to smoke. Cell death was quantified immediately after exposure to smoke (c) and after further incubation for 1 h (d). Each data point represents the mean of 4 replicates (each, 100 cells; bars, S.D).Back to article page