Fig. 7

Oxidative DNA damage (net Fpg) in A549 cells measured by the CA as relative percentage of DNA in tail after 3 and 24 h exposure to NMs. Negative values represent the assay’s variability. Data are presented as mean values from at least 3 independent experiments (with two technical replicates in each independent experiment) + / − SD. Statistically significant difference of the exposed samples compared to the negative control calculated by one-way ANOVA (Dunnett`s multiple comparisons test): *p < 0.05, **p < 0.01