Browsing by Autor "Glady Castellano"

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    Contribución al estudio de los componentes del aceite esencial de la Espeletia schultzii
    (1986) Alfredo Usubillaga; Glady Castellano
    Espeletia schuitzii is a compositae endemic to many Venezuelan paramos. From the resin of this plant the essential oil was obtained by steam distillation. It was inspected by gas chromatography on a carbowax 20M column and showed 34 peaks, two of them represent around 70% of the essence. It was treated on a dry silicagel column and five fraccions of different polarity were obtained. The first fraction contained the two mayor components which were identified by GC MS analysis as a and s-pinene.This finding was confirmed by the C- 13 spectrum of the essential oil . CMR analysis permitted comparison of the essential oils obtained from fresh plants collected at different paramos. No differences in composition were found.