Fig. 7From: Silica encapsulation of ZnO nanoparticles reduces their toxicity for cumulus cell-oocyte-complex expansionAnalysis of Zn2+ ions released during the culture. ICP-MS analysis of Zn2+ ions present in culture medium after 0, 3.5 and 16 h of incubation of uZnO and SiO2ZnO NPs, both at concentration of 10 μg/ml. The results are presented as percentage of the starting concentration (mean ± sd)Back to article page