Fig. 5. (A) Microscopic images of the effect on C2C12 of SiNPs at different concentrations and incubation times. (B) The MTT assay of SiNPs at different concentrations (200 ng mL⁻¹, 1000 ng mL⁻¹ and 2000 ng mL⁻¹) and incubation times (24, 48 and 72 h) with the control solution. Experiments were performed in triplicate.