Antioxidant activities and polyphenolic contents of three selected Micromeria species from Croatia.
Molecules
; 16(2): 1454-70, 2011 Feb 10.
Article
em En
| MEDLINE
| ID: mdl-21311413
ABSTRACT
Antioxidant activities of three selected Micromeria species growing in Croatia (M. croatica, M. juliana and M. thymifolia) were evaluated using five different antioxidant assays, in comparison with plant polyphenolic constituents and reference antioxidants. All studied ethanolic extracts exhibited considerable activity to scavenge DPPH and hydroxyl free radicals, reducing power, iron chelating ability and total antioxidant capacity in the order M. croatica > M. juliana > M. thymifolia. Total polyphenol (9.69-13.66%), phenolic acid (5.26-6.84%), flavonoid (0.01-0.09%) and tannin (3.07-6.48%) contents in dried plant samples were determined spectrophotometrically. A strong positive correlation between antioxidant activities and contents of phenolic acids and tannins was found, indicating their responsibility for effectiveness of tested plants. Our findings established Micromeria species as a rich source of antioxidant polyphenols, especially the endemic M. croatica.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Fenóis
/
Flavonoides
/
Extratos Vegetais
/
Lamiaceae
/
Antioxidantes
País/Região como assunto:
Europa
Idioma:
En
Revista:
Molecules
Assunto da revista:
BIOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Croácia