Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits

Detalhes bibliográficos
Autor(a) principal: Silva, Rúben
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/2580
Resumo: Dissertação de mest., Ciências Biomédicas, Departamento de Ciências Biomédicas e Medicina, Univ. do Algarve, 2011
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spelling Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefitsPropriedades antioxidantes e conteúdo fenólico de infusões de folhas, caules e flores de Portulaca oleracea L.: benefícios para a saúdePlantas medicinaisBeldroegaPortucala oleraceaÓmega-3AntioxidanteDissertação de mest., Ciências Biomédicas, Departamento de Ciências Biomédicas e Medicina, Univ. do Algarve, 2011The present study analyzes the antioxidant properties of Portulaca oleracea, common known as purslane. This plant is an interesting object of study because it is a naturally occurring widely distributed plant and it was used for centuries in folk medicines all around the world. Samples were harvested in two different locations, one from Algarve (location 1) and another from Alentejo (location 2), and divided in three different parts: leaves, stems and flowers. Then, they were dried in an incubator, powdered and water extracts were performed and analyzed. Total antioxidant activity, total phenolic content, condensed tannins, reducing power, and ferric-reducing antioxidant power assays showed significant higher values (P<0,05) in location 2 rather than in location 1, and generally stems present the same pattern when comparing to other plant parts. Moreover, good correlations were found between TPC and all the other assays, which suggest that in purslane the antioxidant activity and reducing power are essentially due to the content of phenolic compounds. Also DPPH and ABTS assays present better results in location 2, since it was needed lower concentrations to inhibit 50% of the free radicals in solution than in location 1. On the other hand, for total flavonoids content only stems present this significant difference and for total monomeric anthocyanins and total carotenes higher concentrations were presented by location 1. The same seems to happen with individual analysis of phenolic acids and flavonoids by liquid-chromatography, where methanol extracts were used. Also, DNA nicking assay showed that water extracts of purslane effectively protect DNA from oxidative damage of hydroxyl radicals. As general conclusion of this study it is possible to state that both location and plant parts have a significant interference on antioxidant activity and that Portulaca oleracea is a rich source of antioxidants among other compounds with a great number of potential benefits for human health.Carvalho, Isabel Saraiva deSapientiaSilva, Rúben2013-03-14T18:18:48Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/10400.1/2580eng615.32 SIL*Ant Caveinfo: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:RCAAP2023-07-24T10:13:41Zoai:sapientia.ualg.pt:10400.1/2580Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:56:26.604863Repositório 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 properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
Propriedades antioxidantes e conteúdo fenólico de infusões de folhas, caules e flores de Portulaca oleracea L.: benefícios para a saúde
title Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
spellingShingle Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
Silva, Rúben
Plantas medicinais
Beldroega
Portucala oleracea
Ómega-3
Antioxidante
title_short Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
title_full Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
title_fullStr Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
title_full_unstemmed Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
title_sort Antioxidant properties and phenol content of Portulaca oleracea L. leaf, stems and flowers infusions: health benefits
author Silva, Rúben
author_facet Silva, Rúben
author_role author
dc.contributor.none.fl_str_mv Carvalho, Isabel Saraiva de
Sapientia
dc.contributor.author.fl_str_mv Silva, Rúben
dc.subject.por.fl_str_mv Plantas medicinais
Beldroega
Portucala oleracea
Ómega-3
Antioxidante
topic Plantas medicinais
Beldroega
Portucala oleracea
Ómega-3
Antioxidante
description Dissertação de mest., Ciências Biomédicas, Departamento de Ciências Biomédicas e Medicina, Univ. do Algarve, 2011
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
2013-03-14T18:18:48Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.1/2580
url http://hdl.handle.net/10400.1/2580
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 615.32 SIL*Ant Cave
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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