Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/749 |
Resumo: | Olive 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. |
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Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulationsOlea europaeaOlive leavesCopperPhenolsAntioxidant activityOlive 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.ElsevierBiblioteca Digital do IPBFerreira, Isabel C.F.R.Barros, LillianSoares, Maria ElisaBastos, Maria de LourdesPereira, J.A.2008-09-03T15:32:24Z20072007-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/749engFerreira, 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. 188-195.0308-814610.1016/j.foodchem.2006.08.006info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:03:47Zoai:bibliotecadigital.ipb.pt:10198/749Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:24.840983Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
title |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
spellingShingle |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations Ferreira, Isabel C.F.R. Olea europaea Olive leaves Copper Phenols Antioxidant activity |
title_short |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
title_full |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
title_fullStr |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
title_full_unstemmed |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
title_sort |
Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations |
author |
Ferreira, Isabel C.F.R. |
author_facet |
Ferreira, Isabel C.F.R. Barros, Lillian Soares, Maria Elisa Bastos, Maria de Lourdes Pereira, J.A. |
author_role |
author |
author2 |
Barros, Lillian Soares, Maria Elisa Bastos, Maria de Lourdes Pereira, J.A. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Ferreira, Isabel C.F.R. Barros, Lillian Soares, Maria Elisa Bastos, Maria de Lourdes Pereira, J.A. |
dc.subject.por.fl_str_mv |
Olea europaea Olive leaves Copper Phenols Antioxidant activity |
topic |
Olea europaea Olive leaves Copper Phenols Antioxidant activity |
description |
Olive 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. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 2007-01-01T00:00:00Z 2008-09-03T15:32:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/749 |
url |
http://hdl.handle.net/10198/749 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ferreira, 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. 0308-8146 10.1016/j.foodchem.2006.08.006 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1817552513536098304 |