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2 Polish Journal of Chemistry

2 2006

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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.

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.

Chemical Composition and Antimicrobial Activity of the Essential Oils from Aerial Parts of Two Marrubium sp. (Lamiaceae) GrowingWild in Lebanon

100%

Grassia A. , Senatore F. , Arnold A. , Bruno M. , Piozzi F. , Rigano D. , Forimsano C.

2006

tom Vol. 80, nr 4

623-628

The essential oils of aerial parts of Marrubium globosum Montbr. etAuch. ex Benth. ssp. libanoticum (Boiss) Davis and M. cuneatum Banks et Solander (Lamiaceae) growing wild in Lebanon were obtained by hydrodistillation and were analysed by GC and GC-MS. Altogether 64 compounds, representing 93.4% and 91.4% of the oils,were identified. The main components of both oils were beta-caryophyllene (12.4%-5.2%), hexadecanoic acid (7.4%-6.5%) and spathulenol (5.2%-6.5%). Bicyclogermacrene (5.2%) was present only in the oil of M. cuneatum characterized by high amount of germacrene D (15.6%). Oils showed a moderate antimicrobial activity.