FIG. 2.

Influence of cadmium oxide and different types of nanoparticles on the metabolic activity of the C18–4 spermatogonial stem cells after 48 h incubation. At the end of the incubation period, mitochondrial function was determined by the MTS reduction assay as described in Materials and Methods. Each panel is a composite of two experiments, with n ≥ 3 for each point. *Statistically significant difference compared with controls (p < 0.05). A. MTS reduction in presence of different concentrations of cadmium chloride and cadmium oxide. B. MTS reduction in presence of different concentrations of silver carbonate and silver nanoparticles (Ag—15 nm). C. MTS reduction in presence of different concentration of sodium molybdate and molybdenum nanoparticles (MoO₃—30 nm).