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Chemical composition and variation of the essential oil of wild sardinian helichrysum italicum G. don subsp. microphyllum (Willd.) nym from vegetative period to post-blooming / M. Usai 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. 373-380 Titre : Chemical composition and variation of the essential oil of wild sardinian helichrysum italicum G. don subsp. microphyllum (Willd.) nym from vegetative period to post-blooming Type de document : texte imprimé Auteurs : M. Usai, Auteur ; M. Foddai, Auteur ; A. F. Bernardini, Auteur Année de publication : 2011 Article en page(s) : pp. 373-380 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Helichrysum  italicum  ssp.  microphyllum  Asteraceae  Essential  oil  composition  Neryl  acetate  Nerol  Eudesm-5-en-11-ol  Seasonal  variation Index. décimale : 646 Résumé : The essential oils obtained by water distillation from the aerial parts of Helichrysum italicum G. Don subsp. microphyllum (Willd.) Nym. were analyzed by gC and gC/MS. Three different populations growing at different elevations and under different weather conditions were studied from their vegetative period to post-blooming time. Forty-eight constituents accounting for between 96.5% and 83.0% of total oils have been identified and quantified. Among the identified constituents those present in the highest percentage were neryl acetate (17.6–35.6%), nerol (3.7–14.4%) and eudesmen-5-en-11-ol (6.4–23.5%). Among them, the neryl acetal percentage decreased when 5-eudesmen-11-ol percentage increased, and limonene reached 7% relative composition. The main fraction of the oil consisted of oxygenated compounds present in higher concentrations in June. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700350 [article] Chemical composition and variation of the essential oil of wild sardinian helichrysum italicum G. don subsp. microphyllum (Willd.) nym from vegetative period to post-blooming [texte imprimé] / M. Usai, Auteur ; M. Foddai, Auteur ; A. F. Bernardini, Auteur . - 2011 . - pp. 373-380. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 373-380 Mots-clés : Helichrysum  italicum  ssp.  microphyllum  Asteraceae  Essential  oil  composition  Neryl  acetate  Nerol  Eudesm-5-en-11-ol  Seasonal  variation Index. décimale : 646 Résumé : The essential oils obtained by water distillation from the aerial parts of Helichrysum italicum G. Don subsp. microphyllum (Willd.) Nym. were analyzed by gC and gC/MS. Three different populations growing at different elevations and under different weather conditions were studied from their vegetative period to post-blooming time. Forty-eight constituents accounting for between 96.5% and 83.0% of total oils have been identified and quantified. Among the identified constituents those present in the highest percentage were neryl acetate (17.6–35.6%), nerol (3.7–14.4%) and eudesmen-5-en-11-ol (6.4–23.5%). Among them, the neryl acetal percentage decreased when 5-eudesmen-11-ol percentage increased, and limonene reached 7% relative composition. The main fraction of the oil consisted of oxygenated compounds present in higher concentrations in June. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700350