Table II.

Effects of silica nanoparticles on body weight and organ coefficients of heart in rats (mean ± standard deviation; n=8).

Groups	Weight prior to exposure, g	Weight following final exposure, g	Difference in weight, g	Index of heart
Control	203.29±6.85	312.67±36.88	109.38	0.0062±0.005
2 mg/kg·bw	201.38±6.80	310.74±30.18	99.36	0.0062±0.004
5 mg/kg·bw	208.36±5.64	310.26±29.69	101.90	0.0063±0.008
10 mg/kg·bw	209.38±10.21	288.36±34.67	78.96a	0.0071±0.003

^aP<0.05 vs. control group.