Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/8378
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dc.contributor.authorCorreia, Helena-
dc.contributor.authorGonzález-Paramás, Ana-
dc.contributor.authorAmaral, Maria Teresa-
dc.contributor.authorSantos-Buelga, Celestino-
dc.contributor.authorBatista, Maria Teresa-
dc.date.accessioned2009-02-09T14:50:46Z-
dc.date.available2009-02-09T14:50:46Z-
dc.date.issued2005en_US
dc.identifier.citationPhytochemical Analysis. 16:5 (2005) 380-387en_US
dc.identifier.urihttp://hdl.handle.net/10316/8378-
dc.description.abstractThe antioxidant activity of an aqueous extract (infusion) and respective ethyl acetate fraction of Equisetum telmateia Ehrh. (Equisetaceae), a plant used in traditional medicine for its anti-inflammatory and diuretic properties, has been evaluated by DPPH, TEAC and TBARS assays. A high and significant antioxidant activity was detected in the ethyl acetate fraction. Analysis of the aqueous extract and the ethyl acetate fraction by HPLC-PAD-ESI/MS allowed the identification of the major phenolic compounds as flavan-3-ol, kaempferol and phenolic acid derivatives. Among the flavan-3-ols, A-type proanthocyanidins and afzelechin derivatives were detected as well as the more common B-type procyanidins, B2 and C1, whose identification was further confirmed by HPLC using detection involving chemical reaction with p-dimethylamino-cinnamaldehyde. The results suggest that the anti-inflammatory activity of E. telmateia could be due, at least in part, to the presence of compounds with antioxidant activity. Copyright © 2005 John Wiley & Sons, Ltd.en_US
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleCharacterisation of polyphenols by HPLC-PAD-ESI/MS and antioxidant activity in Equisetum telmateiaen_US
dc.typearticleen_US
dc.identifier.doi10.1002/pca.864en_US
item.grantfulltextopen-
item.languageiso639-1en-
item.fulltextCom Texto completo-
crisitem.author.deptFaculty of Pharmacy-
crisitem.author.researchunitCNC - Center for Neuroscience and Cell Biology-
crisitem.author.orcid0000-0003-4183-6202-
Appears in Collections:FFUC- Artigos em Revistas Internacionais
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