| Texto completo | |
| Autor(es): |
Ballus, Cristiano Augusto
[1]
;
Meinhart, Adriana Dillenburg
[1]
;
de Souza Campos, Jr., Francisco Alberto
[1]
;
Godoy, Helena Teixeira
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Campinas UNICAMP, Fac Food Engn, Dept Food Sci, BR-13083862 Campinas, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY; v. 92, n. 6, p. 843-851, JUN 2015. |
| Citações Web of Science: | 14 |
| Resumo | |
Polar extracts of extra-virgin olive oils (EVOO) contain a large number of phenolic compounds with antioxidant properties. The antioxidant capacity can be measured by different reaction mechanisms, as the single electron transfer (SET) or the hydrogen atom transfer (HAT). In this work, the total phenolic content (TPC) by the Folin-Ciocalteu method and its correlation with four antioxidant capacity assays (FRAP, ABTS, DPPHaEuro cent and ORAC) were evaluated for EVOO polar extracts. It was observed that the higher the total phenolic compounds in the EVOO extracts, the higher the antioxidant capacities, regardless of the method employed. The reaction mechanism observed for TPC by Folin-Ciocalteu method and also for FRAP, ABTS and DPPHaEuro cent antioxidant capacity assays is a single electron transfer, thus, a high correlation among their results is expected. However, the correlation between TPC and ORAC results was also high and significant, allowing to conclude that EVOO phenolic compounds are able to react by the hydrogen atom transfer mechanism, which indicates that they can act as effective radical chain-breaking antioxidants. These results suggest that, for the EVOO polar extracts, TPC by Folin-Ciocalteu and ORAC assays could be sufficient to evaluate their in vitro antioxidant capacity. (AU) | |
| Processo FAPESP: | 08/57548-0 - Desenvolvimento e validação de metodologia analítica para determinação de compostos fenólicos em azeite de oliva por eletroforese capilar |
| Beneficiário: | Helena Teixeira Godoy |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 13/25242-7 - Efeito do amadurecimento da azeitona sobre o teor de compostos fenólicos em azeites de oliva extravirgem produzidos na região sudeste do brasil |
| Beneficiário: | Cristiano Augusto Ballus |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |