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The geographical variation and antimicrobial activity of african wormwood (Artemisia afra Jacq.) essential oil / Alvaro M. Viljoen in The journal of essential oil research, Vol. 18 N° Spécial (Juillet 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° Spécial (Juillet 2006) . - pp. 19-25 Titre : The geographical variation and antimicrobial activity of african wormwood (Artemisia afra Jacq.) essential oil Type de document : texte imprimé Auteurs : Alvaro M. Viljoen, Auteur ; Sandy F. Van Vuuren, Auteur ; Tebogo Gwebu, Auteur Année de publication : 2013 Article en page(s) : pp. 19-25 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Artemisia  afra  Asteraceae  Essential  oil  composition  1,8-cineole  Artemisia  ketone  α-thujone  β-thujone  Artemisia  alcohol  Camphor  Antimicrobial  activity  Death  kinetics Résumé : The aerial parts of 16 individual Artemisia afra plants from four natural populations were hydrodistilled and the essential oil analyzed by GC/MS. The oil composition varied quantitatively and qualitatively within and between natural populations and showed no correlation to the geographical distribution. The antimicrobial activity was demonstrated by means of time-kill methodology using the respiratory pathogens C. neoformans and K. pneunwniae. Antimicrobial activity was most prominent within 10 min at concentration 0.75% for K. pneumoniae and within 60 min at concentration 1% for C. neofomans. Investigation of the four major compounds most abundant in the A. afra oil (artemisia ketone, 1,8-cineole, α- and β-thujone) indicated minimal antimicrobial activity when investigated independently and in various combinations against K. pneumoniae. ISSN : 1041-2905 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=18019076 [article] The geographical variation and antimicrobial activity of african wormwood (Artemisia afra Jacq.) essential oil [texte imprimé] / Alvaro M. Viljoen, Auteur ; Sandy F. Van Vuuren, Auteur ; Tebogo Gwebu, Auteur . - 2013 . - pp. 19-25. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° Spécial (Juillet 2006) . - pp. 19-25 Mots-clés : Artemisia  afra  Asteraceae  Essential  oil  composition  1,8-cineole  Artemisia  ketone  α-thujone  β-thujone  Artemisia  alcohol  Camphor  Antimicrobial  activity  Death  kinetics Résumé : The aerial parts of 16 individual Artemisia afra plants from four natural populations were hydrodistilled and the essential oil analyzed by GC/MS. The oil composition varied quantitatively and qualitatively within and between natural populations and showed no correlation to the geographical distribution. The antimicrobial activity was demonstrated by means of time-kill methodology using the respiratory pathogens C. neoformans and K. pneunwniae. Antimicrobial activity was most prominent within 10 min at concentration 0.75% for K. pneumoniae and within 60 min at concentration 1% for C. neofomans. Investigation of the four major compounds most abundant in the A. afra oil (artemisia ketone, 1,8-cineole, α- and β-thujone) indicated minimal antimicrobial activity when investigated independently and in various combinations against K. pneumoniae. ISSN : 1041-2905 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=18019076