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PAS staining evaluation of gastric mucosal lesions of the rats in different groups (PAS staining 20x): (a) the normal control group; (b) the ulcer control group; (c) the reference group (omeprazole 20 mg/kg); (d). rat pre-treated with P. chinense (62.50 mg/kg); (e) rat pre-treated with P. chinense (125 mg/kg); (f) rat pre-treated with P. chinense (250 mg/kg); (g) rat pre-treated with P. chinense (500 mg/kg).
