• Applied Biological Chemistry
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• v.41 no.5
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• pp.395-398
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• 1998

To develop the natural antibacterial agents which don't have any toxicity against man, collected several species of medicinal plants were tested for their antibacterial activity and inhibition effect on organic acids production from Streptococcus mutans. Among the tested medicinal plants, methanol extracts and n-hexane fraction of Juniperus rigida S. et Z. had the comparatively strong activities. For example, strong antibacterial effect against S. mutans were showed in methanol extracts, n-hexane and chloroform fractions. Organic acids production were reduced to 89.3 and 90.8% of control in methanol extracts and n-hexane fraction treated concentration of 1 mg/ml, respectively.