Analysis of the Phenolic Content and Antioxidant Activities of Soybean Extracts from Different Regions and Cultivars

Title
Analysis of the Phenolic Content and Antioxidant Activities of Soybean Extracts from Different Regions and Cultivars
Authors
Jung-Hwan Nam강석우Su-Young HongSu-Jeong KimYoung-Ik JinHyun-Sam KimYoung-Ho YoonJin-Cheol Jeong판철호엄병헌노주원Hyun-Choong Ok
Keywords
Antioxidant activity; Epicatechin; Isoflavone; Phenolic compounds; Soybean
Issue Date
2014-12
Publisher
한국자원식물학회지 (Korean Journal of Plant Resources)
Citation
VOL 27, NO 6, 610-621
Abstract
Phenolic compounds such as isoflavones contribute to the antioxidant properties of soybean. This study investigated differences in the phenolic content and antioxidant activity of ten soybean cultivars grown in two different locations in Korea. We observed a wide range of variation in total isoflavone and phenolic content by location and cultivar. The total isoflavone content of cultivars grown at Pyeongchang (sub-highland) was significantly higher than that in cultivars grown at Gangneung (lowland). In contrast, the total phenolic content of cultivars grown at Gangneung was greater than that of cultivars grown at Pyeongchang. The radical scavenging activity of DPPH was similar to that of the total phenolic content rather than that of the total isoflavone content. These results suggest that antioxidant activity of soybean was associated with phenolic compounds rather than isoflavones. To identify the individual antioxidant components, we used an on-line HPLC-ABTS+-based assay system, ESI/MS, and NMR. The results showed that the strongest antioxidant activity was linked to epicatechin.
URI
http://pubs.kist.re.kr/handle/201004/49906
ISSN
12263591
Appears in Collections:
KIST Publication > Article
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