Figure 3. Effects of n-TiO2, n-SiO2, n-ZnO, n-CeO2 on NO production by mussel hemocytes.

Hemocytes were exposed to different concentrations of n-oxides (1, 5, 10 g/ml) for different times (from 1 to 4 hr) and NO production was evaluated as nitrite accumulation by the Griess reaction as described in Methods. A) n-TiO2; B) n-SiO2; C) n-ZnO, D) n-CeO2. Data, representing the mean�SD of four experiments in triplicate, were analysed by ANOVA followed by Tukey's post hoc test. * = P=0.05, all treatments vs controls..