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Détail de l'auteur
Auteur A. Cristina Figueiredo
Documents disponibles écrits par cet auteur
Affiner la rechercheEssential oil composition and glandular trichomes of marrubium vulgare L. growing wild in Algeria / Rachid Belhattab in The journal of essential oil research, Vol. 18 N° 4 (Juillet-Août 2006)
[article]
in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 369-373
Titre : Essential oil composition and glandular trichomes of marrubium vulgare L. growing wild in Algeria Type de document : texte imprimé Auteurs : Rachid Belhattab, Auteur ; Larbi Larous, Auteur ; A. Cristina Figueiredo, Auteur Année de publication : 2006 Article en page(s) : pp. 369-373 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Marrubium vulgare Lamiaceae Horehound Glandular trichomes Nonglandular trichomes Essential oil composition Eugenol β-bisabolene Résumé : A scanning electron microscopic (SEM) study of the aerial parts of Marrubium vulgare L. grown wild in Algeria showed a dense woolly indumentum of stellate, nonglandular, point-shaped trichomes that completely hide both the adaxial and abaxial leaf epidermes, as well as the stem and flower surfaces bearing the glandular trichomes. Peltate and two types of capitate trichomes constitute the morphological distinct glandular trichomes that are spread over the vegetative and reproductive organs. The essential oils of M. vulgare were obtained by hydrodistillation and distillation-extraction from the aerial parts collected during the flowering (F) and vegetative phases (V), and analyzed by GC and GC/MS. The essential oils were obtained in a yield of ≤ 0.05% (v/w). Eugenol was the main component in the F oil (50%) but comprised only 16% in the V oil. β-Bisabolene was the dominant component of the V oil (29%) and the second main component in the F oil (11%). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699116#.UXrY0UqC5mM [article] Essential oil composition and glandular trichomes of marrubium vulgare L. growing wild in Algeria [texte imprimé] / Rachid Belhattab, Auteur ; Larbi Larous, Auteur ; A. Cristina Figueiredo, Auteur . - 2006 . - pp. 369-373.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 369-373
Mots-clés : Marrubium vulgare Lamiaceae Horehound Glandular trichomes Nonglandular trichomes Essential oil composition Eugenol β-bisabolene Résumé : A scanning electron microscopic (SEM) study of the aerial parts of Marrubium vulgare L. grown wild in Algeria showed a dense woolly indumentum of stellate, nonglandular, point-shaped trichomes that completely hide both the adaxial and abaxial leaf epidermes, as well as the stem and flower surfaces bearing the glandular trichomes. Peltate and two types of capitate trichomes constitute the morphological distinct glandular trichomes that are spread over the vegetative and reproductive organs. The essential oils of M. vulgare were obtained by hydrodistillation and distillation-extraction from the aerial parts collected during the flowering (F) and vegetative phases (V), and analyzed by GC and GC/MS. The essential oils were obtained in a yield of ≤ 0.05% (v/w). Eugenol was the main component in the F oil (50%) but comprised only 16% in the V oil. β-Bisabolene was the dominant component of the V oil (29%) and the second main component in the F oil (11%). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699116#.UXrY0UqC5mM Thymus carnosus boiss. / M. Graça Miguel in The journal of essential oil research, Vol. 17 N° 4 (Juillet-Août 2005)
[article]
in The journal of essential oil research > Vol. 17 N° 4 (Juillet-Août 2005) . - pp. 422-426
Titre : Thymus carnosus boiss. : Effect of harvesting period, collection site and type of plant material on essential oil composition Type de document : texte imprimé Auteurs : M. Graça Miguel, Auteur ; Joao Duarte, Auteur ; A. Cristina Figueiredo, Auteur Année de publication : 2006 Article en page(s) : pp. 422-426 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Thymus carnosus Lamiaceae Harvesting period Essential oil composition Borneol Terpinen-4-ol Camphene Cis-sabinene hydrate Résumé : The essential oils, isolated by hydrodistillation, from the flowers and the remaining aerial parts (leaves plus stems) from three populations of Thymus carnosus Boiss., collected at different harvesting periods and in three collection sites of Portugal (QL, LM and LA) were analyzed by GC and GC/MS. The oil yields from the flowers collected in LA, QL and LM were six, four and one-fold higher, respectively, than the average oil yields from the remaining aerial parts. Monoterpenes were dominant in all oils (>86%), and sesquiterpenes accounted for 1–6% of the total oils. Diterpenes, phenylpropanoids and non-terpenoid compounds were present in all oils (0.1–0.6%, trace amounts and t-0.4%, respectively). Borneol (26–31%) and camphene (9–18%) dominated QL oils and borneol (18–23%), terpinen-4-ol (11–19%) and camphene (8–10%) were the main components of LM oils. LA oils showed high variability in the dominant components, cis-sabinene hydrate (14%), terpinen-4-ol (12%) and borneol (11%) being the main components in the flower oil. Terpinen-4-ol (18%) and borneol (18%) dominated the vegetative phase oil, whereas borneol (21%) and terpinen-4-ol (16%) dominated the aerial parts oils collected in May and July, respectively. QL oils can be classified as a borneol/camphene chemotype and one of the LA samples as borneol/cis-sabinene hydrate/terpinen-4-ol chemotype. However, all the other LM and LA samples do not fi t within the previously defi ned chemotypes. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9698950#.UchLnmF2_n6 [article] Thymus carnosus boiss. : Effect of harvesting period, collection site and type of plant material on essential oil composition [texte imprimé] / M. Graça Miguel, Auteur ; Joao Duarte, Auteur ; A. Cristina Figueiredo, Auteur . - 2006 . - pp. 422-426.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 17 N° 4 (Juillet-Août 2005) . - pp. 422-426
Mots-clés : Thymus carnosus Lamiaceae Harvesting period Essential oil composition Borneol Terpinen-4-ol Camphene Cis-sabinene hydrate Résumé : The essential oils, isolated by hydrodistillation, from the flowers and the remaining aerial parts (leaves plus stems) from three populations of Thymus carnosus Boiss., collected at different harvesting periods and in three collection sites of Portugal (QL, LM and LA) were analyzed by GC and GC/MS. The oil yields from the flowers collected in LA, QL and LM were six, four and one-fold higher, respectively, than the average oil yields from the remaining aerial parts. Monoterpenes were dominant in all oils (>86%), and sesquiterpenes accounted for 1–6% of the total oils. Diterpenes, phenylpropanoids and non-terpenoid compounds were present in all oils (0.1–0.6%, trace amounts and t-0.4%, respectively). Borneol (26–31%) and camphene (9–18%) dominated QL oils and borneol (18–23%), terpinen-4-ol (11–19%) and camphene (8–10%) were the main components of LM oils. LA oils showed high variability in the dominant components, cis-sabinene hydrate (14%), terpinen-4-ol (12%) and borneol (11%) being the main components in the flower oil. Terpinen-4-ol (18%) and borneol (18%) dominated the vegetative phase oil, whereas borneol (21%) and terpinen-4-ol (16%) dominated the aerial parts oils collected in May and July, respectively. QL oils can be classified as a borneol/camphene chemotype and one of the LA samples as borneol/cis-sabinene hydrate/terpinen-4-ol chemotype. However, all the other LM and LA samples do not fi t within the previously defi ned chemotypes. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9698950#.UchLnmF2_n6