Table 2.

Results from probe test in the control and different experimental groups at particular days of exposure period (values are presented as mean ± SEM, n = 10 for each group).

	Number of crossing			% Time in the target quadrant			% Time in the opposite quadrant
Exposure duration	CG	EG-I	EG-II	CG	EG-I	EG-II	CG	EG-I	EG-II
6d	0.9 ± 0.4	1.5 ± 0.5	0.4 ± 0.2	24.3 ± 3.9	25.9 ± 3.5	22.8 ± 4.9	33.9 ± 4.0	26.8 ± 4.2	31.1 ± 4.0
20d	1.3 ± 0.4	0.9 ± 0.3	0.6 ± 0.4	27.8 ± 3.6	35.5 ± 5.3	27.1 ± 4.2	28.4 ± 4.5	27.6 ± 6.6	28.5 ± 4.4
34d	2.0 ± 0.6	1.9 ± 0.5	1.3 ± 0.5	36.8 ± 4.8	41.7 ± 4.5	24.0 ± 3.7*	15.8 ± 1.7	15.1 ± 2.8	30.7 ± 4.1**

^*Indicates significant difference compared with the CG and EG-I, P < 0.05;

^**Indicates significance compared with the CG and EG-I, P < 0.01.