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Changes in the Physicochemical Characteristics and the Antioxidative Activity of Cheonggukjang by Addition of Walnut

호두 첨가에 따른 청국장의 이화학적 특성 및 항산화능 변화

  • Park, Hwa-Young (Dept. of Food Science & Technology, Koera National University of Transportation) ;
  • Ryu, Beom-Seok (Dept. of Food Science & Technology, Koera National University of Transportation) ;
  • Choi, Ung-Kyu (Dept. of Food Science & Technology, Koera National University of Transportation)
  • 박화영 (한국교통대학교 식품공학과) ;
  • 유범석 (한국교통대학교 식품공학과) ;
  • 최웅규 (한국교통대학교 식품공학과)
  • Received : 2015.09.11
  • Accepted : 2015.12.10
  • Published : 2015.12.31

Abstract

This study was conducted to investigate the changes in the physicochemical characteristics and antioxidant activity of cheonggukjang with the addition of walnuts. The pH of cheonggukjang did not change significantly with the addition of walnut. But the water content decreased significantly. Walnut addition to the soybean was expected to have a positive effect because the number of Bacillus subtilis was not reduced. The viscous substance content was significantly decreased when more than 20% of walnut was added to cheonggukjang. The addition of walnut made the color darker. The flavonoid and polyphenol content was sharply increased in proportion to the walnut addition and the DPPH radical scavenging activity of cheonggukjang also increased. Altogether, it was found that the addition of walnut had a positive influence on the cheonggukjang by increasing the antioxidant activity.

Keywords

References

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