Chemical Properties and DPPH Radical Scavenging Ability of Sword Bean (Canavalia gladiata) Extract
2012
Kim, J.P., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Yang, Y.S., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Kim, J.H., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Lee, H.H., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Kim, E.S., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Moon, Y.W., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea | Kim, J.Y., Chonnam National University, Gwangju, Republic of Korea | Chung, J.K., Health and Environment Research Institute of Gwangju, Gwangju, Republic of Korea
We investigated the chemical properties and antioxidant activities of sword bean (SWB) and compared it to soybean (SB) and black soybean (seoritae, BSB). The value of vitamin C, vitamin A, crude fat, and crude protein in SWB was 25.5, 0.37 mg/kg, 1.2, and 25.6%, respectively. The crude fat content (1.2%) in SWB was very low in comparison with those of SB (16.5%) and BSB (16.1%). In 16 free amino acids investigated, the histidine content (9.2%) was high in SWB, followed by SB (3.0%) and BSB (2.9%). Total flavonoid content of SWB (493.2 mg/100 g) was significantly higher than those of SB (71.8 mg/100 g) and BSB (97.5 mg/100 g). Total polyphenol content of SWB (1,152.0 mg/100 g) was not significantly different from that of SB (1,165.7 mg/100 g) but lower than that of BSB (1,298.6 mg/100 g). DPPH radical scavenging activity (SC∧50, 50% scavenging concentration) of SWB was 13.1 ㎍/mL , whereas that of positive control (α-tocopherol) was 8.3 ㎍/mL.
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