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http://dx.doi.org/10.13103/JFHS.2016.31.5.386

Isoflavone, β-Glucan Content and Antioxidant Activity of Defatted Soybean Powder by Bioconversion with Lentinula edodes  

Jung, Tae-Dong (Department of Food Science and Biotechnology, Kangwon National University)
Shin, Gi-Hae (Department of Food Science and Biotechnology, Kangwon National University)
Kim, Jae-Min (Department of Food Science and Biotechnology, Kangwon National University)
Choi, Sun-Il (Department of Food Science and Biotechnology, Kangwon National University)
Lee, Jin-Ha (Department of Food Science and Biotechnology, Kangwon National University)
Lee, Sang Jong (STR biotech Co., LTD.)
Heo, In Young (STR biotech Co., LTD.)
Park, Seon Ju (STR biotech Co., LTD.)
Oh, Sea-Kwan (Crop Post-harvest Technology Division, National Institute of Crop Science, RDA)
Woo, Koan-Sik (Crop Post-harvest Technology Division, National Institute of Crop Science, RDA)
Lim, Jae Kag (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Lee, Ok-Hwan (Department of Food Science and Biotechnology, Kangwon National University)
Publication Information
Journal of Food Hygiene and Safety / v.31, no.5, 2016 , pp. 386-392 More about this Journal
Abstract
This study investigated the isoflavone content, total phenol content, antioxidant activities (DPPH radical scavenging and oxygen radical absorbance capacity) and ${\beta}$-glucan content of defatted soybean extracts by bioconversion. Soybean was fermented with Lentinula edodes using submerged liquid fermentation system. Defatted soybean powder prepared by hexane (HDS; hexane defatted soybean) and ethanol (EDS; ethanol defatted soybean). The major components of non-fermented HDS (NFHDS) and EDS (NFEDS) were glucoside, such as daidzin, glycitin and genistin. During the bioconversion processing, isoflavone glucoside converted into aglycone such as daidzein, glycitein and genistein. The highest total isoflavone contents of fermented HDS (FHDS) were $2577.96{\mu}g/mL$, and the lowest total isoflavone contents of NFEDS were $428.27{\mu}g/mL$. The highest total phenol contents of fermented EDS (FEDS) was 42.34 mg GAE/g. DPPH radical scavenging and ORAC value were 31.30 to 59.92% and 247.48 to $786.36{\mu}M\;TE/g$ in non-fermented defatted soybean and fermented soybean, respectively. ${\beta}$-Glucan contents were 0.09 to 0.11% in non-fermented defatted soybean and fermented soybean, respectively. These results indicate that fermented soybean could be used as natural antioxidants for the development of functional foods.
Keywords
glycine max(L.); isoflavone; defatted soybean; antioxidant activity; bioconversion;
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Times Cited By KSCI : 13  (Citation Analysis)
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