It has been known that diseases related with aging or cancer result, at least in part, from free radicals, and antioxidants may reduce or prevent the abnormalities associated with free radical formation via its scavenging action. Thus, this study was carried out to investigate the antioxidative and antimicrobial activities of nut species for the purpose of developing antioxidant from natural products. Antioxidant activities of four kinds of nuts such as chestnut, groundnut, walnut and acorn were examined by measuring the radical scavenging effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The extracts from chestnut hull and acorn barnyard millet showed strong antioxidative activities among 10 samples tested. Because of their highest antioxidative activity among 10 samples, radical scavenging effects of 4 different extract compartments (Hexane, EtOAc, BuOH and $H_2O$ extracts) from chestnut hull and acorn barnyard millet, were further examined by DPPH method. EtOAc and BuOH extracts exhibited antioxidative activities similar to those of natural, tocopherol or synthetic antioxidants, BHA. These findings demonstrates that major fraction of the antioxidative activity of chestnut hull or acorn barnyard millet was the EtOAc and BuOH extract compartments. However, antimicrobial activities against food-related bacteria and yeasts was relatively weak.
Moon, Young-Gun ; Choi, Kwang-Sik ; Lee, Kyeong-Jun ; Kim, Ki-Young ; Heo, Moon-Soo 2007. "Lactic Acid Bacterias Growth, Antioxidant Activities and Antimicrobial Activity on Fish Pathogenic Bacteria by Native Plant Extracts, Jeju Island" 한국미생물·생명공학회지 = Korean journal of microbiology and biotechnology, 35(3): 210~219
Cho, Bae-Sick ; Lee, Jae-Joon ; Lee, Myung-Yul 2007. "Effects of Ethanol Extracts from Petasites japonicus S. et Z. Max. on Hepatic Antioxidative Systems in Alcohol Treated Rats" 한국식품영양과학회지 = Journal of the Korean Society of Food Science and Nutrition, 36(3): 298~300
Jung, Bok-Mi ; Park, Jung-Ae ; Bae, Song-Ja 2008. "Growth Inhibitory and Quinone Reductase Induction Activities of Salicornia herbacea L. Fractions on Human Cancer Cell Lines in vitro" 한국식품영양과학회지 = Journal of the Korean Society of Food Science and Nutrition, 37(2): 148~153
Kim, Mi-Seon ; Kim, Kyoung-Hee ; Yook, Hong-Sun 2012. "Antioxidative and Physiological Activities of Fractions from Pleurospermum kamtschaticumin Extracts" 한국식품영양과학회지 = Journal of the Korean Society of Food Science and Nutrition, 41(10): 1338~1345