In vitro inhibitory effects of rosemary extracts on growth and glucosyltransferase activity of Streptococcus sobrinus

dc.contributor國立臺灣師範大學人類發展與家庭學系zh_tw
dc.contributor.authorPo-Jung Tsai, Tzung-Hsun Tsai, Su-Chen Ho.,en_US
dc.date.accessioned2014-12-02T06:40:07Z
dc.date.available2014-12-02T06:40:07Z
dc.date.issued2007-01-01zh_TW
dc.description.abstractRosemary (Rosmarinus officinalis L.) extract functions as an antioxidant and antimicrobial agent. In this study, we investigated in vitro effects of rosemary extracts on Streptococcus sobrinus growth and on its extracellular glucosyltransferase activity. The antibacterial activities of rosemary extracts were determined by the microdilution broth method. The minimum inhibitory concentrations of aqueous and methanolic rosemary extracts against S. sobrinus were 16 and 4 mg/ml, respectively. Glucosyltransferase activity was tested by incubating a crude enzyme preparation with sucrose and determining the amount of water-insoluble glucan formed. Both aqueous and methanolic extracts of rosemary markedly inhibited the formation of water-insoluble glucan. The 50% inhibitory doses of aqueous and methanolic extracts against the glucosyltransferases of S. sobrinus were 1.42 mg/ml and 0.34 mg/ml, respectively. Our results suggest that rosemary extract may prove effective for the inhibition of the growth of cariogenic oral streptococci.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/pii/S0308814606009198zh_TW
dc.identifierntnulib_tp_A0308_01_005zh_TW
dc.identifier.issn0308-8146zh_TW
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/41506
dc.languageen_USzh_TW
dc.publisherELSEVIERen_US
dc.relationFood Chemistry, 105, 311-316.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.foodchem.2006.11.051zh_TW
dc.subject.otherGlucanen_US
dc.subject.otherGlucosyltransferaseen_US
dc.subject.otherOral streptococcien_US
dc.subject.otherRosemaryen_US
dc.titleIn vitro inhibitory effects of rosemary extracts on growth and glucosyltransferase activity of Streptococcus sobrinusen_US

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