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[Objective] To optimize the extraction technology of oleoresin from Thymus mongolicus Ronn., and study its antimicrobial activity. [Method] Supercritical carbondioxide extraction (SFE-CO2) technique was applied to investigate the effects of extraction pressure, extraction time and extraction temperature on the yield of oleoresin from Thymus mongolicus Ronn.. Then the antimicrobial activity of its extracts was studied. [Result] The optimal extracting conditions of oleoresin were as follows: extraction temperature of 40 ℃, extraction pressure of 25 MPa and extraction time of 4 h. Extracts had antimicrobial activities against 4 indicator strains including Staphyloccocus aureus Rosenbach, Pseudomonas aeruginosa, Escherichia coli and Candida albicans in varying degrees. [Conclusion] Oleoresin from Thymus mongolicus Ronn. was expected to be used as food preservative or bacteriostat.
[Objective] To optimize the extraction technology of oleoresin from Thymus mongolicus Ronn., And study its antimicrobial activity. [Method] Supercritical carbondioxide extraction (SFE-CO2) technique was applied to investigate the effects of extraction pressure, extraction time and extraction temperature on the yield of oleoresin from Thymus mongolicus Ronn .. Then the anti extracting activity of its extracts was studied. [Result] The optimal extraction conditions of oleoresin were as follows: extraction temperature of 40 ° C, extraction pressure of 25 MPa and extraction time of 4 h Extracts had antimicrobial activities against 4 indicator strains including Staphyloccocus aureus Rosenbach, Pseudomonas aeruginosa, Escherichia coli and Candida albicans in varying degrees. [Conclusion] Oleoresin from Thymus mongolicus Ronn. Was expected to be used as food preservative or bacteriostat.