Identification of phenolic antioxidants and bioactives of pomegranate seeds following juice extraction using HPLC-DAD-ESI-MSn.
Food Chem
; 221: 1883-1894, 2017 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-27979177
ABSTRACT
Phenolics from free and hydrolyzed fractions of pomegranate juice (PJ) and seeds (PS) were evaluated. In general, total phenolic contents and scavenging of ABTS+, DPPH and hydroxyl radicals, as well as metal chelation of the soluble fraction from PS, were higher than those for PJ. Insoluble-bound phenolics from PS accounted for up to 27% of total scavenging capacity (free+esterified+insoluble-bound). Phenolic acids (13), monomeric flavonoids (8), hydrolysable tannins (12), proanthocyanidin (1) and anthocyanins (12) were tentatively characterized using HPLC-DAD-ESI-MSn. Several compounds were identified for the first time in PJ or PS. The inhibition of DNA damage (induced by hydroxyl and peroxyl radicals), copper-induced LDL-cholesterol peroxidation, as well as alpha-glucosidase and lipase activities were demonstrated, therefore supporting the potential exploitation of PJ and PS as sources of bioactive compounds.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fenóis
/
Sementes
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Flavonoides
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Extratos Vegetais
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Lythraceae
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Antioxidantes
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Food Chem
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Canadá