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Essential oil composition and antimicrobial activity of ageratum conyzoides from S. tomé and príncipe / Ana Paula Martins in The journal of essential oil research, Vol. 17 N° 3 (Mai-Juin 2005) 

Public ISBD [article]  in The journal of essential oil research > Vol. 17 N° 3 (Mai-Juin 2005) . - pp. 239-242 Titre : Essential oil composition and antimicrobial activity of ageratum conyzoides from S. tomé and príncipe Type de document : texte imprimé Auteurs : Ana Paula Martins, Auteur ; Lígia R. Salgueiro, Auteur ; Maria José Gonçalves, Auteur Année de publication : 2006 Article en page(s) : pp. 239-242 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Ageratum  conyzoides  Asteraceae  Fiá-malé-homem  Essential  oil  composition  Precocene  I  β-caryophyllene  Antimicrobial  activity Résumé : The essential oil of Ageratum conyzoides from S. Tomé and Príncipe was investigated for the first time. The oil was obtained by hydrodistillation of the aerial parts, and subsequently analyzed by GC, GC/MS and 13C-NMR. The oil was characterized by the presence of high percentages of precocene I (34.4%) and β-caryophyllene (24.6%), as well as small amounts of precocene II. Using the disk diffusion method, the oil of A. conyzoides showed weak activity against Staphylococcus aureus, S. epidermidis, Streptococcus faecalis, Proteus vulgaris and Cladosporium cladosporioides, and was inactive against Escherichia coli, Candida albicans, Cryptococcus neoformans, Aspergillus niger and A. fumigatus. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9698888#.UeJ7mGF2_n4 [article] Essential oil composition and antimicrobial activity of ageratum conyzoides from S. tomé and príncipe [texte imprimé] / Ana Paula Martins, Auteur ; Lígia R. Salgueiro, Auteur ; Maria José Gonçalves, Auteur . - 2006 . - pp. 239-242. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 17 N° 3 (Mai-Juin 2005) . - pp. 239-242 Mots-clés : Ageratum  conyzoides  Asteraceae  Fiá-malé-homem  Essential  oil  composition  Precocene  I  β-caryophyllene  Antimicrobial  activity Résumé : The essential oil of Ageratum conyzoides from S. Tomé and Príncipe was investigated for the first time. The oil was obtained by hydrodistillation of the aerial parts, and subsequently analyzed by GC, GC/MS and 13C-NMR. The oil was characterized by the presence of high percentages of precocene I (34.4%) and β-caryophyllene (24.6%), as well as small amounts of precocene II. Using the disk diffusion method, the oil of A. conyzoides showed weak activity against Staphylococcus aureus, S. epidermidis, Streptococcus faecalis, Proteus vulgaris and Cladosporium cladosporioides, and was inactive against Escherichia coli, Candida albicans, Cryptococcus neoformans, Aspergillus niger and A. fumigatus. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9698888#.UeJ7mGF2_n4