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Seasonal variations of teucrium flavum L. essential oil / Maria Lo Presti in The journal of essential oil research, Vol. 22 N° 3 (Mai/Juin 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 3 (Mai/Juin 2010) . - pp. 211 - 216 Titre : Seasonal variations of teucrium flavum L. essential oil Type de document : texte imprimé Auteurs : Maria Lo Presti, Auteur ; Maria L. Crupi, Auteur ; Rosaria Costa, Auteur Année de publication : 2010 Article en page(s) : pp. 211 - 216 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Teucrium  flavum  Lamiaceae  Essential  oil  composition  Germacrene  D  b-bisabolene Index. décimale : 646 Résumé : Essential oils from the aerial parts of Sicilian Teucrium flavum L., isolated by using microwave-assisted hydrodistillation (MHD), were analyzed for the first time at various seasonal stages (vegetative and budding stage) by means of GC/MS and GC-FID; the flowers and fruits were also subjected to examination. More than 80 compounds were identified as oil components. The leaf, flower and fruit oils were characterized by a predominance of sesquiterpenes, such as b-caryophyllene (3–5 g/100 g), germacrene D (4–14 g/100 g), b-bisabolene (32–49 g/100 g); the total amount of sesquiterpene hydrocarbons contained in each oil was 56–70 g/100 g, the oxygenated derivatives were in the range of 9–20 g/100 g. The monoterpene hydrocarbons in all samples (leaves, flowers, fruits) were contained in very low amounts, from 0.2 to 1.6 g/100 g, and were the least representative fraction of the oils. Oxygenated aliphatic compounds, especially esters, were also detected. The results can be useful to support, by means of a safe reliable sample preparation (MHD) and analytical (GC) technique, the research on medicinal plants belonging to Mediterranean flora. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/51 [article] Seasonal variations of teucrium flavum L. essential oil [texte imprimé] / Maria Lo Presti, Auteur ; Maria L. Crupi, Auteur ; Rosaria Costa, Auteur . - 2010 . - pp. 211 - 216. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 3 (Mai/Juin 2010) . - pp. 211 - 216 Mots-clés : Teucrium  flavum  Lamiaceae  Essential  oil  composition  Germacrene  D  b-bisabolene Index. décimale : 646 Résumé : Essential oils from the aerial parts of Sicilian Teucrium flavum L., isolated by using microwave-assisted hydrodistillation (MHD), were analyzed for the first time at various seasonal stages (vegetative and budding stage) by means of GC/MS and GC-FID; the flowers and fruits were also subjected to examination. More than 80 compounds were identified as oil components. The leaf, flower and fruit oils were characterized by a predominance of sesquiterpenes, such as b-caryophyllene (3–5 g/100 g), germacrene D (4–14 g/100 g), b-bisabolene (32–49 g/100 g); the total amount of sesquiterpene hydrocarbons contained in each oil was 56–70 g/100 g, the oxygenated derivatives were in the range of 9–20 g/100 g. The monoterpene hydrocarbons in all samples (leaves, flowers, fruits) were contained in very low amounts, from 0.2 to 1.6 g/100 g, and were the least representative fraction of the oils. Oxygenated aliphatic compounds, especially esters, were also detected. The results can be useful to support, by means of a safe reliable sample preparation (MHD) and analytical (GC) technique, the research on medicinal plants belonging to Mediterranean flora. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/51