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Phenolic compounds and antioxidant activity of two regions Portugal propolis

2008Conference object Open access
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dc.contributor.authorMoreira, Leandro
dc.contributor.authorPereira, Ermelinda
dc.contributor.authorDias, L.G.
dc.contributor.authorPires, Sancia
dc.contributor.authorEstevinho, Leticia M.
dc.date.accessioned2011-03-29T14:59:38Z
dc.date.available2011-03-29T14:59:38Z
dc.date.issued2008
dc.description.abstractThe aim of the present work was to evaluate the total phenolic compounds, quantified and identified the phenolic and flavonoid compounds and also the antiodoxidant activity of the propolis, collected from two regions of Portugal (Trás-os-Montes and Beira-Baixa). The total phenolic content was determined by Folin-Ciocalteu method and identified by Thin Layer Chromatography (TLC) bi-dimensional. The antioxidant activity was evaluated by 1.1-diphenyl-2-picrylhydrazyl scavenging (DPPH) and reducing power assays. The results showed that Tras-os-Montes propolis (329mg/g eq. gallic acid) had a higher content in phenolic compounds of the methanolic extracts than Beira-Baixa propolis (151mg/g eq. gallic acid). The value of the antioxidant activity determined by the DPPH assay was EC50 = 6.22µg/mL and EC50 = 52.00 µg/mL for Trás-os-Montes and Beira-Baixa propolis, respectively. Similar trend was obtained by the reducing power assays (EC50 = 4µg/mL and EC50 = 39µg/mL for the same samples, respectively). Through analysis of the results we can see that the propolis sample of Trás-os-Montes was a highest antioxidant activity, probably due to the amount of total phenolic compounds. Our results suggest that the concentration of propolis of Tras-os-Montes necessary to obtain an antioxidant activity is very low, making possible the use of this propolis as a natural antioxidant.por
dc.identifier.citationMoreira, Leandro; Pereira, Ermelinda; Dias, Luís; Pires, Sância; Estevinho, Letícia (2008). Phenolic compounds and antioxidant activity of two regions Portugal propolis. In 3rd European Conference of Apidology. Belfastpor
dc.identifier.urihttp://hdl.handle.net/10198/3801
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherJennifer Teal, Juliet L Osborne and Robert J Paxtonpor
dc.subjectPropolispor
dc.subjectAntioxidant activitypor
dc.subjectPhenolic compoundspor
dc.titlePhenolic compounds and antioxidant activity of two regions Portugal propolispor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceQueen´s University Belfastpor
oaire.citation.startPage70por
oaire.citation.title3rd European Conference of Apidologypor
person.familyNamePereira
person.familyNameDias
person.familyNamePires
person.familyNameEstevinho
person.givenNameErmelinda
person.givenNameLuís G.
person.givenNameSancia
person.givenNameLetícia M.
person.identifier.ciencia-id3916-218E-1629
person.identifier.ciencia-id2F11-9092-FAAF
person.identifier.ciencia-idCC12-1B38-26C8
person.identifier.ciencia-idBA14-09D6-A406
person.identifier.orcid0000-0002-9431-5059
person.identifier.orcid0000-0002-1210-4259
person.identifier.orcid0000-0001-8427-0179
person.identifier.orcid0000-0002-9249-1948
person.identifier.scopus-author-id35222107200
person.identifier.scopus-author-id23569169900
person.identifier.scopus-author-id53878422600
person.identifier.scopus-author-id6506577664
rcaap.rightsopenAccesspor
rcaap.typeconferenceObject
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relation.isAuthorOfPublicationeac8c166-4056-4ed0-8d8d-7ecb2c4481a5
relation.isAuthorOfPublicationd1319f5d-6ffc-4e2c-9035-fa06b834c88f
relation.isAuthorOfPublication4a1d5ba2-1854-4ca5-89a4-73f35e964df9
relation.isAuthorOfPublication.latestForDiscovery9d6b3744-286d-42bc-b363-533450bdb07c

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