Total phenolic contents and free-radical scavenging activities of grape (Vitis vinifera L.) and grape products.
Int J Food Sci Nutr
; 64(2): 210-6, 2013 Mar.
Article
em En
| MEDLINE
| ID: mdl-23025419
ABSTRACT
Grape is one of the world's largest fruit crops, with an approximate annual production of 58 million metric tons, and it is well known that the grape skins, seeds and stems, waste products generated during wine and grape juice processing, are rich sources of polyphenols. It contains flavonoids, phenolic acids and stilbenes. In this study, we tried to determine antioxidant properties and phenolic contents of grape and grape products (fresh fruit, seed, dried fruit, molasses, pestil, vinegar) of ethanol and water extracts. Antioxidant properties of extracts were investigated by DPPH(â), ABTS(â+), superoxide, H(2)O(2) scavenging, reducing power, metal chelating activity and determination of total phenolic contents. The seed extracts revealed highest ABTS(â+), DPPH(â), H(2)O(2) scavenging and reducing power activities. Furthermore, these extracts showed higher total phenolic contents than other grape product extracts.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fenóis
/
Sequestradores de Radicais Livres
/
Vitis
/
Preparações de Plantas
/
Frutas
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article