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Chemical Composition and Biological Activity of Essential Oil from Flowerheads of Centaurea polymorpha Lag. (Asteraceae) GrowingWild in Spain

100%

Forimsano C. , Senatore F. , Bellone G. , Bruno M. , Grassia A. , Raio A. , Rigano D.

Polish Journal of Chemistry

2006

tom Vol. 80, nr 4

617-622

The volatile constituents of the flowerheads of Centaurea polymorpha Lag. were extracted by hydrodistillation and analysed by GC and GC-MS. 63 components, amounting to 91.6% of the oil, were identified. Waxes and sesquiterpenes were the most abundant components in the oil. alfa-Cedrene (3.9%), beta-cedrene (3.6%) and beta-curcumene (3.0%) were the most representative sesquiterpene hydrocarbons while caryophyllene oxide (2.6%) was the most abundant oxygen containing sesquiterpene. The study on the biological activity of the oils showed no significant activity.

GC-MS analysis of essential oil in herb of St.John's wort [Hypericum perforatum L.]

80%

Wolski T. , Ludwiczuk A. , Mardarowicz M.

Folia Horticulturae

2003

tom 15

nr 1