Table 8.

Absolute and relative organ weights of rats treated with nano-sized Nd₂O₃ for 28 days

Parameter (after exposure)	Dose (mg/m3)
	0	0.5	2.5	10
No. of animals examined	8	8	8	8
Body weight (g)	346.3 ± 18.53a	345.4 ± 21.98	359.2 ± 19.99	347.1 ± 19.53
Lung (g)	1.391 ± 0.094	2.141 ± 0.270**	2.345 ± 0.114**	2.238 ± 0.149**
Per body weight (%)	0.402 ± 0.016	0.619 ± 0.059**	0.655 ± 0.047**	0.645 ± 0.034**
Liver (g)	9.395 ± 0.664	9.490 ± 0.867	9.843 ± 0.981	9.189 ± 0.585
Per body weight (%)	2.713 ± 0.110	2.745 ± 0.124	2.735 ± 0.155	2.650 ± 0.149
Kidney (g)	2.325 ± 0.161	2.424 ± 0.142	2.456 ± 0.218	2.345 ± 0.118
Per body weight (%)	0.672 ± 0.043	0.703 ± 0.043	0.683 ± 0.040	0.676 ± 0.032
Spleen (g)	0.651 ± 0.085	0.644 ± 0.060	0.657 ± 0.070	0.610 ± 0.072
Per body weight (%)	0.188 ± 0.018	0.186 ± 0.011	0.183 ± 0.014	0.176 ± 0.021
Brain (g)	2.038 ± 0.084	2.006 ± 0.049	2.044 ± 0.094	1.981 ± 0.086
Per body weight (%)	0.590 ± 0.033	0.583 ± 0.038	0.571 ± 0.041	0.572 ± 0.035
Parameter (after recovery)	Dose (mg/m3)
	0	0.5	2.5	10
No. of animals examined	8	8	7	8
Body weight (g)	499.9 ± 28.93	495.9 ± 25.25	464.6 ± 44.10	488.6 ± 30.07
Lung (g)	1.709 ± 0.132	2.118 ± 0.191**	3.077 ± 0.482**	3.495 ± 0.460**
Per body weight (%)	0.342 ± 0.027	0.427 ± 0.030**	0.661 ± 0.063**	0.716 ± 0.082**
Liver (g)	13.75 ± 1.675	13.49 ± 0.918	12.39 ± 1.509	13.02 ± 1.021
Per body weight (%)	2.745 ± 0.224	2.720 ± 0.144	2.664 ± 0.135	2.667 ± 0.151
Kidney (g)	3.071 ± 0.292	2.974 ± 0.173	2.829 ± 0.357	2.890 ± 0.148
Per body weight (%)	0.614 ± 0.033	0.600 ± 0.033	0.610 ± 0.058	0.592 ± 0.029
Spleen (g)	0.926 ± 0.095	0.862 ± 0.116	0.828 ± 0.080	0.853 ± 0.034
Per body weight (%)	0.185 ± 0.017	0.174 ± 0.021	0.178 ± 0.010	0.175 ± 0.013
Brain (g)	2.140 ± 0.098	2.113 ± 0.055	2.073 ± 0.072	2.066 ± 0.099
Per body weight (%)	0.428 ± 0.014	0.427 ± 0.018	0.450 ± 0.049	0.425 ± 0.041

^aValues are expressed as means ± SD.

^**Significantly different from vehicle control at p<0.01.