Antioxidant Components and Antioxidant Activities of Methanolic Extract from Adzuki Beans (Vigna angularis var. nipponensis)
2010
Woo, K.S., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Song, S.B., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Ko, J.Y., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Seo, M.C., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Lee, J.S., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Kang, J.R., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Oh, B.G., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Nam, M.H., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Jeong, H.S., Chungbuk National University, Cheongju, Republic of Korea | Lee, J.S., Chungbuk National University, Cheongju, Republic of Korea
In this study, the antioxidant compounds and antioxidant activities of adzuki beans were measured to evaluate their functional properties and to compare them to Daepung and Taekwang. Proximate compositions and mineral contents of the various adzuki beans were not significantly different. A high level of dietary fiber (14.81%) was found in Chilbo-pat. The extraction yields of Daepung and Taekwang were 38.70 and 34.61%, respectively; however the yields of the various adzuki beans were lower at 13.78-20.76%. The total polyphenol and flavonoid content of the various adzuki beans were 19.00-34.75 and 12.97-28.95 mg/g, respectively (Daepung: 14.40 and 3.96 mg/g, Taekwang: 10.7 and 2.61 mg/g). High levels of polyphenols (34.75 mg/g) and flavonoids (28.95 mg/g) were found in Miryang 6. The total anthocyanin and proanthocyanidin contents of the various adzuki beans ranged from 5.89-23.77 and 1.83-3.29 mg/g, respectively. A high level of total tocopherol content (7.66 mg/100 g) was found in Yungum-pat. High levels of ABTS radical (2.44 mg TEAC/mg extract residue) and DPPH radical scavenging activities (4.46 mg TEAC/mg extract residue) were found in Miryang 6. A significant correlation was also noted between free radical scavenging activity and polyphenolic compound content. The results of this study suggest that notable antioxidant activities in various adzuki beans could have significant health benefits.
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