Figure 5From: Comparison of cellular toxicity caused by ambient ultrafine particles and engineered metal oxide nanoparticles LDH activity of A 549 cells treated with the panel of measured particles. # p < 0.05 PM1.8(insoluble) vs control; @ p < 0.05 PM1.8(soluble) vs control; $ p < 0.05 PM5.6(soluble) vs control,;& p < 0.05 Nano CeO2 vs control; *p < 0.05 Nano NiO vs control; ▲p < 0.05 Nano ZnO vs control. Values are mean ± SD from three independent experiments.Back to article page