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Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations

2007Journal article Open access
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dc.contributor.authorFerreira, Isabel C.F.R.
dc.contributor.authorBarros, Lillian
dc.contributor.authorSoares, Maria Elisa
dc.contributor.authorBastos, Maria de Lourdes
dc.contributor.authorPereira, J.A.
dc.date.accessioned2008-09-03T15:32:24Z
dc.date.available2008-09-03T15:32:24Z
dc.date.issued2007
dc.description.abstractOlive trees (Olea europaea L. Cv. Cobranc¸osa) from the northeast of Portugal were sprayed with three different copper formulations [bordeaux mixture (copper sulphate + calcium hydroxide - 20% Cu), copper hydroxide (40% Cu) and copper oxychloride (50% Cu)] to control olive fungal diseases. The residues of copper in olive leaves, harvested at different times, were evaluated by atomic absorption spectrometry. At all the collection times, treated olive leaves had significantly higher copper contents, compared to the control. The different copper amounts in pesticide formulations lowered the leaves contents in total phenols and hence their antioxidant properties. Olive leaves sprayed with copper oxychloride possessed the highest copper levels and the lowest content in phenols, which influenced its antioxidant activity (higher EC50 values for reducing power, scavenging effect on DPPH radicals and inhibition of erythrocyte hemolysis). Leaves without copper residues proved to be a good natural source of antioxidants, giving values comparable to the reference compounds.en
dc.identifier.citationFerreira, Isabel C.F.R.; Barros, Lillian; Soares, M. E.; Bastos, M. L.; Pereira, J.A. (2007). Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations. Food Chemistry. ISSN 0308-8146. 103:1, p. 188-195.en
dc.identifier.doi10.1016/j.foodchem.2006.08.006
dc.identifier.issn0308-8146
dc.identifier.urihttp://hdl.handle.net/10198/749
dc.language.isoengen
dc.peerreviewedyes
dc.publisherElsevieren
dc.subjectOlea europaeaen
dc.subjectOlive leavesen
dc.subjectCopperen
dc.subjectPhenolsen
dc.subjectAntioxidant activityen
dc.titleAntioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulationsen
dc.typejournal article
dspace.entity.typePublication
person.familyNameFerreira
person.familyNameBarros
person.familyNamePereira
person.givenNameIsabel C.F.R.
person.givenNameLillian
person.givenNameJosé Alberto
person.identifier144781
person.identifier469085
person.identifier.ciencia-id9418-CF95-9919
person.identifier.ciencia-id9616-35CB-D001
person.identifier.ciencia-id611F-80B2-A7C1
person.identifier.orcid0000-0003-4910-4882
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0002-2260-0600
person.identifier.ridE-8500-2013
person.identifier.ridJ-3600-2013
person.identifier.ridL-6798-2014
person.identifier.scopus-author-id36868826600
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id57204366348
rcaap.rightsopenAccess
rcaap.typearticleen
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relation.isAuthorOfPublication3af07ffe-f914-48ba-a5d5-efcf70fdce01
relation.isAuthorOfPublication7932162e-a2da-4913-b00d-17babbe51857
relation.isAuthorOfPublication.latestForDiscovery7932162e-a2da-4913-b00d-17babbe51857

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