Stress oxy hóa tăng cường bệnh lý quy trình đóng góp cho bệnh ung thư, bệnh tim mạch và các bệnh neurodegenerative, và chế độ ăn uống chất chống oxy hóa có thể chống lại pro¬ bại hoại phong tục cesses (Mariani, Polidori, Cherubini, & Mecocci, 2005). Many natu¬ral antioxidants have been identified from hazelnut, almond, cashew, Brazil nuts, walnuts, and so on (Andrade et al., 2011; John & Shahidi, 2010; Li, Tsao, Yang, Kramer, & Hernandez, 2007; Mou- rea, Pazos, Medinab, Domingueza, & Parajo, 2007; Shahidi, Alasal- var, & Liyana-Pathirana, 2007). Peanut shell is also a good and readily available source of natural antioxidants, which has at¬tracted much attention from nutritional and chemical researchers. Peanut shell was demonstrated to be rich in antioxidants and other potential health promoting compounds, which could be extracted for use in food (Duncan, Gorbet, & Talcott, 2006; Negi, Chauhan, Sa¬dia, Rohinishree, & Ramteke, 2005). Many physical and chemical techniques have been used to extract antioxidants from peanuts (Ballard, Mallikarjunan, Zhou, & O’Keefe, 2009; Chukwumah, Walk¬er, Verghese, & Ogutu, 2009; Monagas et al., 2009; Potrebko & Res- urreccion, 2009; Yu, Ahmedna, & Goktepe, 2005). Duh, Yeh, and Yen (1992) isolated eighteen fractions from peanut shells by thin-layer chromatography (TLC). Recently, four compounds with antioxidant activities have been isolated from the methanolic ex¬tract of peanut shells and identified as 5,7-dihydroxychromone, eriodictyol, 3',4',7-trihydroxyflavanone, and luteolin by electron impact-mass spectrometry (EI-MS) and nuclear magnetic reso¬nance (NMR) analysis (Wee et al., 2007).
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