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Artigo

Phytochemical content and antioxidant properties of diverse varieties of whole barley (Hordeum vulgare L.) grown in Tunisia

Resumo

Quatro variedades (Rihane, Manel, Roho e Tej) de cevada da Tunísia foram analisadas quanto às suas atividades antioxidantes (AA) usando os métodos ABTS e radicais catiônicos DPPH e poder redutor/antioxidante férrico (FRAP). Foram medidos os teores de fenólicos totais (TPC), flavonoides totais (TFC) e taninos condensados ​​(CTC). Os resultados indicaram que o teor de fenólicos totais variou de 195,02 ± 0,32 a 220,11 ± 0,32 mg equivalente de ácido gálico/100g de peso fresco. Os resultados mostraram que Rihane tem o maior TPC, TFC e CTC em comparação com outras variedades. A cevada Roho teve uma atividade menor do que a cevada Tej. Foi encontrada correlação significativa (p<0,05) entre TPC, TFC, CTC e AA. Este estudo sugere que as variedades de cevada da Tunísia podem servir como uma boa fonte de antioxidantes naturais.



Abstract

Four varieties (Rihane, Manel, Roho, and Tej) of Tunisian barley were analysed for their antioxidant activities (AA) using ABTS and DPPH radicals cation, and ferric reducing/antioxidant power (FRAP) methods. The total phenolic (TPC), total flavonoid (TFC) and condensed tannins (CTC) contents were measured. The results indicated that the total phenolic contents ranged from 195.02 ± 0.32 to 220.11 ± 0.32 mg gallic acid equivalent/100g fresh weight. Results showed that Rihane has the highest TPC, TFC and CTC compared to other varieties. Roho barley had a lower activity than Tej barley. A significant correlation (p<0.05) was found between TPC, TFC, CTC and AA. This study suggests that Tunisian barley varieties may serve as a good source of natural antioxidants.



Lamia Lahouar
Amira El Arem
Fatma Ghrairi
Hassiba Chahdoura
Hichem Ben Salem
Mouledi El Felah
Lotfi Achour

2014 - Food Chemistry

Palavras-chave:

Antioxidant activities, Total phenolic content, Tunisian barley varieties

Termos de indexação:

Cevada, antioxidantes, compostos fenólicos, metabolismo, estresse, bioensaios

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