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|Título:||Essential oil composition of Thymus lotocephallus G. Lopez & R. Morales, collected during flowering and vegetative phases|
|Autor:||Figueiredo, A. C.|
Miguel, Maria Graça
Duarte, A. M. F.
Barroso, J. G.
Pedro, L. G.
|Editora:||John Wiley and Sons|
|Resumo:||The aerial parts of Thymus lotocephalus were collected during the flowering and vegetative phases of the plant in the Algarve, Portugal. The oils were isolated by hydrodistillation and distillation-extraction and analysed by GC and GC-MS. The oil isolated from the flowers was obtained in a yield of 0.9%, whereas those isolated from the leaves during flowering and vegetative phases showed lower yields, 0.7% and 0.2% (v/w), respectively. The oils isolated from both the flowers and the leaves were dominated by the oxygen-containing monoterpenes (57-64%). The monoterpene hydrocarbons (11-22%) and the oxygen-containing sesquiterpenes (7-14%) were the two other main fractions of these oils. 1,8-Cineole (10-19%), linalyl acetate (6-14%) and linalol (4-12%) were the main components of all the oils studied. Intermedeol (2-4%), beta -caryophyllene oxide (2-3%) and viridiflorol (1-3%) were the main components of the oxygen-containing sesquiterpene fraction. The diterpene abietatriene was present in trace amounts (<0.05%) in all the oils. Depending on the plant part studied and on the isolation procedure used, these oils can be characterized either by 1,8-cineole/linalol/linalyl acetate or 1,8-cineole type. Copyright (C) 2001 John Wiley & Sons, Ltd.|
|Aparece nas colecções:||FCT2-Artigos (em revistas ou actas indexadas)|
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|Essential oil composition of Thymus lotocephallus G. López & R. Morales, collected during flowering and vegetative phases.pdf||82,65 kB||Adobe PDF||Ver/Abrir Acesso Restrito. Solicitar cópia ao autor!|
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