RESUMEN
The compositions of the essential oils isolated from the aerial parts of 11 populations of Thymus caespititius collected during the flowering phase on Pico, Faial and Graciosa (Azores) were studied by GC and GC-MS. The monoterpene fraction was dominant in all the oils analysed (55-90%) and consisted mainly of oxygen-containing compounds (44-79%). Sesquiterpenes represented an important fraction of the oils from the populations grown on Graciosa (13-28%). In contrast, this fraction was rather small in the oils from the populations grown on Pico and Faial (6-11%). Despite this, oxygen-containing compounds (4-18%) were always dominant. Cluster analysis of all identified oil components grouped the oils into three main clusters that corresponded with their main components. The oils from the 11 populations studied showed a clear chemical polymorphism that, in some cases, was more evident among populations growing on the same island than among those from different islands.
Asunto(s)
Lamiaceae/química , Aceites Volátiles/química , Azores , Cromatografía de Gases y Espectrometría de Masas , Lamiaceae/genética , Aceites Volátiles/aislamiento & purificación , Compuestos de Oxígeno/análisis , Compuestos de Oxígeno/aislamiento & purificación , Filogenia , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Sesquiterpenos/análisis , Sesquiterpenos/aislamiento & purificaciónRESUMEN
Studies on carrageenin-induced rat paw edema, yeast-induced hyperthermia in rat and writhing response induced by acetic acid in mice showed that the alcoholic extract of stems of Tabernaemontana pandacaqui (T. pandacaqui) has significant anti-inflammatory, antipyretic and antinociceptive activities. These activities are due to alkaloidal components since they were also observed when the crude alkaloidal (CA) fraction separated from alcoholic extract was tested in the same models.