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Biological activity and chemical composition of hydrodistilled and supercritical extracts of xanthium strumarium L. leaves / R. Scherer in The journal of essential oil research, Vol. 22 N° 5 (Septembre/Octobre 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 424-429 Titre : Biological activity and chemical composition of hydrodistilled and supercritical extracts of xanthium strumarium L. leaves Type de document : texte imprimé Auteurs : R. Scherer, Auteur ; R. Wagner, Auteur ; M. A. A. Meireles, Auteur Année de publication : 2011 Article en page(s) : pp. 424-429 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Xanthium  strumarium  Asteraceae  Common  cocklebur  Essential  oil  composition  Supercritical  extract  composition Index. décimale : 646 Résumé : The antimicrobial and antioxidant activities and the composition of the essential oil and of the supercritical extracts of Xanthium strumarium were studied. The best yields were observed in the supercritical extracts (SFE). The composition of the extracts obtained by SFE and by hydrodistillation presented little qualitative difference, but they did differ quantitatively. The essential oil contained a high content of β-guaiene (79.6%) while as the major compounds in the supercritical extracts were unidentifiable compound with Kovats Index of 2303 and xanthinin. All the X. strumarium extracts showed strong antimicrobial activity against Staphylococcus aureus, Escherichia coli, Salmonella thyphimurium, Pseudomonas aeruginosa and Clostridium perfringens, however no differences were observed between the extracts. Poor antioxidant activity was found for all the Xanthium strumarium extracts. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700363 [article] Biological activity and chemical composition of hydrodistilled and supercritical extracts of xanthium strumarium L. leaves [texte imprimé] / R. Scherer, Auteur ; R. Wagner, Auteur ; M. A. A. Meireles, Auteur . - 2011 . - pp. 424-429. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 424-429 Mots-clés : Xanthium  strumarium  Asteraceae  Common  cocklebur  Essential  oil  composition  Supercritical  extract  composition Index. décimale : 646 Résumé : The antimicrobial and antioxidant activities and the composition of the essential oil and of the supercritical extracts of Xanthium strumarium were studied. The best yields were observed in the supercritical extracts (SFE). The composition of the extracts obtained by SFE and by hydrodistillation presented little qualitative difference, but they did differ quantitatively. The essential oil contained a high content of β-guaiene (79.6%) while as the major compounds in the supercritical extracts were unidentifiable compound with Kovats Index of 2303 and xanthinin. All the X. strumarium extracts showed strong antimicrobial activity against Staphylococcus aureus, Escherichia coli, Salmonella thyphimurium, Pseudomonas aeruginosa and Clostridium perfringens, however no differences were observed between the extracts. Poor antioxidant activity was found for all the Xanthium strumarium extracts. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700363