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dc.contributor.authorPereira, S. I.en_US
dc.contributor.authorSantos, P. A. G.en_US
dc.contributor.authorBarroso, J. G.en_US
dc.contributor.authorFigueiredo, A. C.en_US
dc.contributor.authorPedro, L. G.en_US
dc.contributor.authorSalgueiro, L. R.en_US
dc.contributor.authorDeans, S. G.en_US
dc.contributor.authorScheffer, J. J. C.en_US
dc.date.accessioned2008-09-26T17:42:05Z-
dc.date.available2008-09-26T17:42:05Z-
dc.date.issued2000en_US
dc.identifier.citationPhytochemistry. 55:3 (2000) 241-246en_US
dc.identifier.urihttp://hdl.handle.net/10316/5806-
dc.description.abstractThe compositions of the essential oils obtained from ten populations of Thymus caespititius grown on S. Jorge (Azores) were studied by GC and GC-MS. All the oils analysed were dominated by their monoterpene fraction (69-91%). The sesquiterpene fraction was rather small (4-17%) and consisted mainly of oxygen-containing compounds (3-13%). Enantiomeric ratio of sabinene and [alpha]-terpineol was investigated in the oils from some populations. (+)-Sabinene was detected with high enatiomeric purity (96-99%). Although (+)-[alpha] terpineol was the predominant enantiomer, its purity varied considerably (66-97%). Cluster analysis of all identified components grouped the oils into four main clusters that corresponded with their major components: [alpha]-terpineol (43-68%), carvacrol (32-52%), thymol (44-58%) and sabinene (41%). The essential oil from Th. caespititius showed a clear chemical polymorphism, that was particularly evident among four populations growing along a 200 m distance at Pico Verde.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TH7-41K2349-C/1/cb06975bf5d34c6355b8edd36cafe7f0en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectThymus caespirtitiusen_US
dc.subjectLamiaceaeen_US
dc.subjectEssential oilen_US
dc.subjectChemical polymorphismen_US
dc.subjectEnantiomersen_US
dc.subjectChemotypesen_US
dc.titleChemical polymorphism of the essential oils from populations of Thymus caespititius grown on the island S. Jorge (Azores)en_US
dc.typearticleen_US
item.fulltextCom Texto completo-
item.grantfulltextopen-
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