Fig. 1From: Effect of Nano-SiO2 on Expression and Aberrant Methylation of Imprinted Genes in Lung and TestisCharacterization of SiO2 NPs in suspension. Particles were suspended in cell culture medium with 10% FBS. a, b Size and zeta potential of SiO2 NPs was assessed by Zetasizer Nano ZSP. c Cell viability was determined by CCK8 assay after exposure to various concentrations of SiO2 NPs for 24 h. Averages ± SD of duplicate experiments, each consisting of three technical replicates. *** p < 0.001Back to article page