Figure 8.
Relative metabolic activity of LT97 cells measured with the MTT assay, after treatment with ZnO NP or ZnCl2 for 3 h–72 h. SC: solvent control (Millipore water); PC: positive control (0.05% Triton X-100). The data are normalised to the untreated control (=100%; dashed line) and are expressed as the mean + standard deviation; n = 3. Significant differences compared to the untreated control (* p ≤ 0.05) were obtained by one-way analysis of variance/the Ryan-Einot-Gabriel-Welsh post hoc test.