Table 6. The contents of neurotransmitters in rat hippocampus (mean ± SD, n = 8).

Groups (mg L–1)	Glutamate (μmol g–1)	Serine (μmol g–1)	Glycine (μmol g–1)	γ-Aminobutyric acid (μmol g–1)
Control	4.96 ± 0.63	3172.77 ± 667	1807.62 ± 256	3163.46 ± 864
5	5.46 ± 0.48	3314.69 ± 876	1793.93 ± 335	3251.58 ± 798
10	5.50 ± 0.39	3539.64 ± 864	2050.45 ± 345	3451.85 ± 962
20	6.00 ± 0.45*	2866.59 ± 478	1832.1 ± 238	2980.51 ± 763
F	5.884	2.281	1.090	0.424
P	0.003	0.058	0.182	0.737