Earticle

초록

영어

Cheonggukjang, a popular Korean traditional fermented soyfood, was manufactured by fermenting steamed soybeans in a temperature-controlled room by traditional methods in which steamed soy was exposed to rice straw naturally rich in Bacillus species. B. subtilus and B. licheniformis were found to be the major microorganisms present in cheonggukjang made by the traditional method. We analyzed the composition of 12 kinds of isoflavones and their glycosides present in cheonggukjang collected at various fermentation times. Total isoflavone content in raw soybeans was 2,867 mg/kg and this decreased by about 50% during cooking prior to cheonggukjang preparation. However, total isoflavone content changed slightly during 45 hr of fermentation. Total content of isoflavone glycosides, consisting mainly of daidzin, glycitein, and genistin, decreased by about 40% during 45 hr of fermenting cooked soybeans. The contents of tree isoflavones including daidzein, glycitein, and genistein showed a dramatic increase during fermentation in cheonggukjang preparation, with a 2.9-, 54.0-, and 20.6-fold increase in concentration, respectively, by the end of fermentation (45 hr). In conclusion, short-term fermentation of cooked soybeans with Bacillus species caused conspicuous changes in the composition of isoflavone derivatives, and its implication in terms of health benefits deserves further study.

목차

Abstract
 Introduction
 Materials and Methods
 Results and Discussion
 Acknowledgments
 References

키워드

저자

• Jang, Chan-Ho [ Department of Animal Science and Biotechnology, Kyungpook National University ]
• Lim, Jin-Kyu [ Department of Animal Science and Biotechnology, Kyungpook National University ]
• Kim, Jeong-Hwan [ Department of Food Science and Technology, Gyeongsang National University ]
• Park, Cheon-Seok [ Department of Food Science and Biotechnology, Institute of Life Scicences and Resources, KyungHee University ]
• Kwon, Dae-Young [ Korea Food Research Institute ]
• Kim, Yong-Suk [ Research Center for Industrial Development of BioFood Materials, Chonbuk National University ]
• Shin, Dong-Hwa [ Faculty of Biotechnology, Chonbuk National University ]
• Kim, Jong-Sang [ Department of Animal Science and Biotechnology, Kyungpook National University ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Food Science and Biotechnology

• 간기

  격월간

• pISSN

  1226-7708

• 수록기간

  1992~2009

• 십진분류

  KDC 574 DDC 664