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Chemical composition of the needle-twig oils of pinus brutia ten. / Marwan W. Ghosn in The journal of essential oil research, Vol. 18 N° 4 (Juillet-Août 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 445-447 Titre : Chemical composition of the needle-twig oils of pinus brutia ten. Type de document : texte imprimé Auteurs : Marwan W. Ghosn, Auteur ; Najat A. Saliba, Auteur ; Salma Y. Talhouk, Auteur Année de publication : 2006 Article en page(s) : pp. 445-447 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Pinus  brutia  Pinaceae  Essential  oil  composition  α-pinene  β-pinene  δ-3-carene  Limonene  Germacrene  D Résumé : The variation in composition of the essential oils produced from different ratios of needles to terminal twigs of Pinus brutia Ten. in Lebanon was examined by GC and GC/MS. As the mass of the needles increased from 0–100% with respect to twig contents, the % oil yield decreased and the composition changed. Pure needle oil was found to be much richer in oxygenated compounds than that of pure twig oil with a corresponding reduction in amounts of monoterpene hydrocarbons. Marker compounds were chosen in order to show the chemical variation of the oils with respect to different ratio of needles to twigs distilled. By computing both physical and chemical variations, it is suggested that a fair compromise between the yield and the concentration of oxygenated compounds is the 75% needle 25% twig mixture, which appears to be the most suitable proportion of plant material for pine oil production from P. brutia. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699137#.UaSIw9gYrOk [article] Chemical composition of the needle-twig oils of pinus brutia ten. [texte imprimé] / Marwan W. Ghosn, Auteur ; Najat A. Saliba, Auteur ; Salma Y. Talhouk, Auteur . - 2006 . - pp. 445-447. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 445-447 Mots-clés : Pinus  brutia  Pinaceae  Essential  oil  composition  α-pinene  β-pinene  δ-3-carene  Limonene  Germacrene  D Résumé : The variation in composition of the essential oils produced from different ratios of needles to terminal twigs of Pinus brutia Ten. in Lebanon was examined by GC and GC/MS. As the mass of the needles increased from 0–100% with respect to twig contents, the % oil yield decreased and the composition changed. Pure needle oil was found to be much richer in oxygenated compounds than that of pure twig oil with a corresponding reduction in amounts of monoterpene hydrocarbons. Marker compounds were chosen in order to show the chemical variation of the oils with respect to different ratio of needles to twigs distilled. By computing both physical and chemical variations, it is suggested that a fair compromise between the yield and the concentration of oxygenated compounds is the 75% needle 25% twig mixture, which appears to be the most suitable proportion of plant material for pine oil production from P. brutia. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699137#.UaSIw9gYrOk

Chemical profle of the dittrichia graveolens (Desf.) greuter essential oil of lebanese origin / Marwan W. Ghosn in The journal of essential oil research, Vol. 18 N° 4 (Juillet-Août 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 443-444 Titre : Chemical profle of the dittrichia graveolens (Desf.) greuter essential oil of lebanese origin Type de document : texte imprimé Auteurs : Marwan W. Ghosn, Auteur ; Cyril B. Chemali, Auteur ; Farah I. Zaknoun, Auteur Année de publication : 2006 Article en page(s) : pp. 443-444 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Dittrichia  graveolens  Inula  graveolens  Asteraceae  Essential  oil  composition  Borneol  Bornyl  acetate  T-cadinol Résumé : Essential oils isolated from the aerial parts of two different Lebanese wild populations of Dittrichia graveolens were analyzed by GC and GC/MS. It was shown that around 90% of the total composition consisted of oxygenated compounds. The four major components identified were bornyl acetate (70.6–72.3%), T-cadinol (1.4–13.4%), borneol (2.7–12.4%), and caryophyllene oxide (1.9–2.3%), in addition to 21 minor ones. Oils from the two populations possessed a high content of bornyl acetate but differed with respect to borneol and T-cadinol. In comparison with oils of D. graveolens from other populations, it was found that the oil of D. graveolens of Lebanese origin was distinctly richer in oxygenated compounds. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699136#.UaSGatgYrOk [article] Chemical profle of the dittrichia graveolens (Desf.) greuter essential oil of lebanese origin [texte imprimé] / Marwan W. Ghosn, Auteur ; Cyril B. Chemali, Auteur ; Farah I. Zaknoun, Auteur . - 2006 . - pp. 443-444. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 443-444 Mots-clés : Dittrichia  graveolens  Inula  graveolens  Asteraceae  Essential  oil  composition  Borneol  Bornyl  acetate  T-cadinol Résumé : Essential oils isolated from the aerial parts of two different Lebanese wild populations of Dittrichia graveolens were analyzed by GC and GC/MS. It was shown that around 90% of the total composition consisted of oxygenated compounds. The four major components identified were bornyl acetate (70.6–72.3%), T-cadinol (1.4–13.4%), borneol (2.7–12.4%), and caryophyllene oxide (1.9–2.3%), in addition to 21 minor ones. Oils from the two populations possessed a high content of bornyl acetate but differed with respect to borneol and T-cadinol. In comparison with oils of D. graveolens from other populations, it was found that the oil of D. graveolens of Lebanese origin was distinctly richer in oxygenated compounds. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699136#.UaSGatgYrOk