Table 2.

Comparison of NOS activity between groups in cerebellum (X±SD, unit: U/mg protein)

Group	7 d (n)	14 d (n)	21 d (n)	28 d (n)
Control group	1.93±0.19 (7)	1.43±0.29 (6)	1.41±0.18 (7)	1.54±0.50 (8)
0.025% group	1.81±0.12 (8)	1.58±0.17 (6)	0.87±0.24 (5)*	0.43±0.09 (6)*
0.05% group	1.74±0.22 (8)	1.59±0.25 (7)	0.85±0.09 (5)*	0.70±0.14 (6)*▲
0.075% group	1.85±0.30 (7)	1.60±0.26 (5)	0.91±0.18 (6)*	0.82±0.11 (8)*▲

^*Compared with the control group at the same days, P<0.01

^▲Compared with 0.025% group at the same days, P<0.05