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  • a Institut de la Nutrition, de l’Alimentation et Technologies Agro-Alimentaires « I.N.A.T.A-A » Université des Frères Mentouri Constantine, Route de Ain-El-Bey 25017, Constantine, Algeria
  • b Université de Bejaia, Route de Targa-Ouzemour, 06000 Bejaia, Algeria
  • c Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Route de Targa-Ouzemour, 06000 Bejaia, Algeria
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This study was carried out to determine the phenolic contents and the antioxidant activity of four nuts with different solvent extract. Total phenolic compounds, flavonoids, and proanthocyanidin were quantified. Antioxidant activity was evaluated by various in vitro tests, including ferric reducing power, phosphomolybdenum method assay, and free radical scavenging activity. The results showed that the total phenolic contents varied between 0.30 g GAE/100 g (peanuts) and 1.65 g GAE/100 g (walnuts); the flavonoid contents varied between 0.17 g QE/100 g (peanuts) and 0.41 g QE/100 g (hazelnut). The phenolic contents of four nut extracts exhibit potent antioxidant activity. Indeed, walnuts were the richest in total phenolic content and demonstrated the highest potential for overall antioxidant capacity using ferric reducing power assay (FRP), phosphomolybdenum method assay, and free radical scavenging activity (FRSA). Phenolic amounts positively correlated with antioxidant activity tested.

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