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Scavenging capacity of strawberry tree (Arbutus unedo L.) leaves on free radicals

2009Journal article Restricted access
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dc.contributor.authorOliveira, Ivo
dc.contributor.authorCoelho, Valentim
dc.contributor.authorBaltasar, Raquel
dc.contributor.authorPereira, J.A.
dc.contributor.authorBaptista, Paula
dc.date.accessioned2011-01-13T16:06:14Z
dc.date.available2011-01-13T16:06:14Z
dc.date.issued2009
dc.description.abstractDespite strawberry tree (Arbutus unedo L.) leaves had a long use in traditional medicine due to its antiseptic, diuretic, astringent and depurative properties, the potential of their antioxidant activity are still lacking. Our study goals to assess the antioxidant and free radical scavenging potential of water, ethanol, methanol and diethyl ether extracts of A. unedo leaves. Total phenols content was achieved spectrophotometrically using Folin–Ciocalteau reagent with gallic acid as standard. Antioxidant activity was evaluated using three different methods: reducing power of iron (III)/ferricyanide complex assay, scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals and scavenging effect on superoxide radicals by using the PMS–NADH–nitroblue tetrazolium system. Ethanol extracts of A. unedo leaves were the highest in reducing power (IC50 232.7 lg/mL) and DPPH scavenging effect (IC50 63.2 lg/mL) followed by water extracts (with IC50 of 287.7 and 73.7 lg/mL, respectively); whereas diethyl ether extracts were the lowest. In the scavenging on superoxide radical assay, methanol extracts obtained the best results (IC50 6.9 lg/mL). For all the methods tested the antioxidant activity was concentration dependent. In accordance with antioxidant activity, highest total phenols content were found in ethanol, followed by water, methanol and diethyl ether extract. The results indicated that A. unedo leaves are a potential source of natural antioxidants.por
dc.identifier.citationOliveira, I.; Coelho, V.; Baltasar, R.; Pereira, J.A.; Baptista, P. (2009). Scavenging capacity of strawberry tree (Arbutus unedo L.) leaves on free radicals. Food and Chemical Toxicology. ISSN 0278-6915. 47:7, p. 1507-1511por
dc.identifier.doi10.1016/j.fct.2009.03.042
dc.identifier.issn0278-6915
dc.identifier.urihttp://hdl.handle.net/10198/3106
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectArbutus unedo L. leavespor
dc.subjectExtraction methodpor
dc.subjectTotal phenolspor
dc.subjectAntioxidant activitypor
dc.subjectSuperoxide scavengingpor
dc.titleScavenging capacity of strawberry tree (Arbutus unedo L.) leaves on free radicalspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1511por
oaire.citation.issue47por
oaire.citation.startPage1507por
oaire.citation.titleFood and Chemical Toxicologypor
person.familyNameCoelho
person.familyNamePereira
person.familyNameBaptista
person.givenNameValentim
person.givenNameJosé Alberto
person.givenNamePaula
person.identifier.ciencia-id0618-49BC-EACE
person.identifier.ciencia-id611F-80B2-A7C1
person.identifier.ciencia-id7D11-FE1E-CD0F
person.identifier.orcid0000-0001-5829-7669
person.identifier.orcid0000-0002-2260-0600
person.identifier.orcid0000-0001-6331-3731
person.identifier.ridL-6798-2014
person.identifier.scopus-author-id26533798200
person.identifier.scopus-author-id57204366348
person.identifier.scopus-author-id14051688000
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication99a97d58-8b4c-4a49-9855-d334d568b9f3
relation.isAuthorOfPublication7932162e-a2da-4913-b00d-17babbe51857
relation.isAuthorOfPublication3f35226a-b17a-4f7d-8da1-3297105cbfe9
relation.isAuthorOfPublication.latestForDiscovery99a97d58-8b4c-4a49-9855-d334d568b9f3

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