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Composition and chemical variability in the essential oil of hyptis marrubioides epl. / Juliana F. Sales in The journal of essential oil research, Vol. 19 N°6 (Novembre/Decembre 2007) 

Public ISBD [article]  in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 552-556 Titre : Composition and chemical variability in the essential oil of hyptis marrubioides epl. Type de document : texte imprimé Auteurs : Juliana F. Sales, Auteur ; José Eduardo B. P. Pinto, Auteur ; Priscila P. Botrel, Auteur Année de publication : 2008 Article en page(s) : pp. 552-556 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Hyptis  marrubioides  Lamiaceae  Essential  oil  composition  Caryophylla-4(14),8(15)-dien-5β-ol  Eudesma-4(15),7-dien-1β-ol  α-copaene  β-caryophyllene  Epi-longipinanol  Caryophyllene  oxide  Chemical  variability  Canonical  discriminant  analysis Résumé : The essential oils from stems and leaves (fresh or dried, and whole or sliced) of Hyptis marrubioides collected from two localities of Brazilian Cerrado were investigated by GC and GC/MS. Caryophylla-4(14),8(15)-dien-5β-ol, eudesma-4(15),7-dien-1β-ol, caryophyllene oxide and β-caryophyllene were the principal constituents. The results were submitted to Principal Component and Cluster analysis which allowed three groups of oils to be distinguished with respect to sampling site and post-harvested process: cluster I (fresh leaves and fresh or dried stems from Lavras site) with high percentage of caryophylla-4(14),8(15)-dien-5β-ol (16.7%) and eudesma-4(15),7-dien-1β-ol (12.8%); cluster II (dried leaves and stems from Tiradentes site) with epi-longipinanol (16.2%) rich oil, and cluster III (dried leaves from Lavras) containing a high content of β-caryophyllene (17.4%) and α-copaene (10.1%). Canonical discriminant analysis showed that is possible to accurately predict 100% well-classification in the original clusters using β-caryophyllene, epi-longipinanol and caryophylla-4(14),8(15)-dien-5β-ol as predictor variables. The whole or sliced plant materials resulted in similar chemical composition. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699329#.UXJbRUqC5mM [article] Composition and chemical variability in the essential oil of hyptis marrubioides epl. [texte imprimé] / Juliana F. Sales, Auteur ; José Eduardo B. P. Pinto, Auteur ; Priscila P. Botrel, Auteur . - 2008 . - pp. 552-556. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 552-556 Mots-clés : Hyptis  marrubioides  Lamiaceae  Essential  oil  composition  Caryophylla-4(14),8(15)-dien-5β-ol  Eudesma-4(15),7-dien-1β-ol  α-copaene  β-caryophyllene  Epi-longipinanol  Caryophyllene  oxide  Chemical  variability  Canonical  discriminant  analysis Résumé : The essential oils from stems and leaves (fresh or dried, and whole or sliced) of Hyptis marrubioides collected from two localities of Brazilian Cerrado were investigated by GC and GC/MS. Caryophylla-4(14),8(15)-dien-5β-ol, eudesma-4(15),7-dien-1β-ol, caryophyllene oxide and β-caryophyllene were the principal constituents. The results were submitted to Principal Component and Cluster analysis which allowed three groups of oils to be distinguished with respect to sampling site and post-harvested process: cluster I (fresh leaves and fresh or dried stems from Lavras site) with high percentage of caryophylla-4(14),8(15)-dien-5β-ol (16.7%) and eudesma-4(15),7-dien-1β-ol (12.8%); cluster II (dried leaves and stems from Tiradentes site) with epi-longipinanol (16.2%) rich oil, and cluster III (dried leaves from Lavras) containing a high content of β-caryophyllene (17.4%) and α-copaene (10.1%). Canonical discriminant analysis showed that is possible to accurately predict 100% well-classification in the original clusters using β-caryophyllene, epi-longipinanol and caryophylla-4(14),8(15)-dien-5β-ol as predictor variables. The whole or sliced plant materials resulted in similar chemical composition. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699329#.UXJbRUqC5mM