Monomeric and oligomeric flavan-3-ols and antioxidant activity of leaves from different <i>Laurus</i> sp.

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Ana F Vinha (Autor) Outra; Luis F Guido (Autor) FCUP; Anabela S G Costa (Autor) Outra; Rita C Alves (Autor) Outra; Beatriz B P P Oliveira (Autor) FFUP

Revista

Título: Food and Function

Vol. 6

Páginas: 1944-1949

ISSN: 2042-6496

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 15 Citações

Scopus - 15 Citações

Classificação Científica

FOS: Ciências agrárias > Outras ciências agrárias

Outras Informações

ID Authenticus: P-00G-BWF

DOI: 10.1039/c5fo00229j

Abstract (EN): The phenolic profile and antioxidant activity of three endemic Laurus sp. from Portugal were analysed. Dried leaves of L. nobilis L., L. azorica (Seub.) Franco, and L. novocanariensis Rivas Mart., Lousa, Fern. Prieto, E. Dias, J. C. Costa & C. Aguiar, collected in the mainland and in the Azores and Madeira archipelagos, respectively, were used to prepare different extracts (aqueous, ethanolic and hydroalcoholic). They were studied regarding their DPPH center dot scavenging activity, total phenolic and flavonoid contents, and the main phenolic compounds were identified by HPLC-DAD-ESI-MS/MS. Total flavonoid contents were 30.1, 46.3, and 36.7 mg of epicatechin equivalents per g of sample (dry weight) for L. nobilis, L. azorica and L. novocanariensis, respectively. Epicatechin was the major compound, representing similar to 12.1% of total flavan-3-ols in L. nobilis, similar to 25.6% in L. azorica, and similar to 19.9% in L. novocanariensis. Although all samples presented a similar phenolic profile, significant differences were observed in their total contents and antioxidant activity.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6