Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Effect of the Addition of Antimicrobial Materials Before and After Aging on the Physicochemical Properties of Low-Salt Kochujang during Storage

  • Seo, Young-Eun (Department of Food & Nutrition, Mokpo National University) ;
  • Bae, Hwa-Sook (Department of Food & Nutrition, Mokpo National University) ;
  • Kim, Dong-Han (Department of Food & Nutrition, Mokpo National University)
  • Received : 2014.02.17
  • Accepted : 2014.04.29
  • Published : 2014.12.31
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Abstract

To improve the shelf life of low-salt Kochujang, Korean hot pepper paste, antimicrobial materials were added at different times before and after aging. The kochujang was then packaged and stored at $30^{\circ}C$ for 15 weeks, and changes in microbiological and physiochemical properties were evaluated. Hunter a- and b-values decreased considerably during storage. The total color difference (${\delta}E$) was greater in the ethanol-chitosan (EC) treatment than in the control and after pasteurization (A-P) treatment. Gas was produced until the seventh week of storage. The control and the A-P treatments produced more gas than the other treatments, and these had the largest number of yeasts and aerobic bacteria. The pH of the EC treatment was higher than that of the other treatments, and the A-P treatment had the highest level of titratable acidity. During storage, the oxidation-reduction potential was lower in the EC and ethanol-mustard-chitosan (EMC) treatments. The reducing sugar content decreased remarkably in the control and A-P treatments, with high production of ethanol. There was a significant change in the content of amino-type nitrogen in the control and A-P treatments, and the content of ammonia-type nitrogen was lowest in the EMC treatment. In the sensory test of kochujang, the ethanol-mustard (EM) and ethanol (E) treatments were significantly higher than the EC, control, and A-P treatments (p <0.05). EM or E alone was effective in extending the shelf life of kochujang when added before aging.

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References

  1. Chun MS, Lee TS, and Noh BS (1992) Effect of gamma-irradiation on quality of kochujang during storage. Foods and Biotechnology 1, 117-22.
  2. Difco Laboratories (1984) In Difco Manual, (10th ed.), Difco, USA.
  3. Institute of Miso Technologists (1968) Official methods of miso analysis, Changpyongdang Press, Japan.
  4. James MJ (2000) In Modern Food Microbiology, (6th ed.), Apac Publishers, Singapore.
  5. Kim DH (2001) Effect of condiments on the microflora, enzyme activity and taste components of traditional kochujang during fermentation. Korean J Food Sci Technol 33, 264-70.
  6. Kim DH and Kwon YM (2001) Effect of storage conditions on the microbiological and physicochemical characteristics of traditional kochujang. Korean J Food Sci Technol 33, 589-95.
  7. Kim DH and Yang SE (2004) Fermentation characteristics of low salted kochujang prepared with sub-materials. Korean J Food Sci Technol 36, 97-104.
  8. Kim DH, Lee JS, and Lee SB (2002) Effect of storage conditions on the chemical characteristics of traditional kochujang. Korean J Food Sci Technol 34, 466-71.
  9. Kim GT, Hwang YI, Lim SI, and Lee DS (2000a) Carbon dioxide production and quality changes in Korean fermented soybean paste and hot pepper soybean paste. J Korean Soc Food Sci Nutr 29, 807-13.
  10. Kim JO and Lee KH (1994) Effect of temperature on color and color preference of industry-produced kochujang during storage. J Korean Soc Food Nutr 23, 641-6.
  11. Kim MS, Ahn EY, Ahn ES, and Shin DH (2000b) Characteristic changes of kochujang by heat treatment. Korean J Food Sci Technol 32, 867-74.
  12. Kim MS, Ahn YS, and Shin DH (2000c) Analysis of browning factors during fermentation of kochujang. Korean J Food Sci Technol 32, 1149-57.
  13. Kim MS, Oh JA, Kim IW, Shin DH, and Han MS (1998) Fermentation properties of irradiated kochujang. Korean J Food Sci Technol 30, 934-40.
  14. Kwan DJ, Jung JW, Kim JH, Park JY, Yoo JY, Koo YJ et al. (1996) Studies on establishment of optimal aging time of Korean traditional kochujang. Agricultural Chemistry and Biotechnology 39, 127-33.
  15. Lee JS, Choi YJ, Kwon SJ, Yoo JY, and Chung DH (1996) Screening and characterization of osmotolerant and gas-producing yeasts from traditional doenjang and kochujang. Foods and Biotechnology 5, 54-8.
  16. Lee KS and Kim DH (1985) Trial manufacture of low-salted kochuzang(red pepper soybean paste) by the addition of alcohol. Korean J Food Sci Technol 17, 146-54.
  17. Lee KY, Kim HS, Lee HG, Han O, and Chang UJ (1997) Studies on the prediction of the shelf-life of kochujang through the physicochemical and sensory analyses during storage. J Korean Soc Food Sci Nutr 26, 588-94.
  18. Martin EP (1950) Use of acid, rose bengal, and streptomycin in the plate method for estimating soil fungi. Soil Sci 69, 215-32. https://doi.org/10.1097/00010694-195003000-00006
  19. Park SJ and Kim DH (2007) Effect of combined use of various anti-microbial materials on brewing of low salted kochujang. J Korean Soc Appl Biol Chem 50, 287-94.
  20. Shin DB, Park WM, Yi OS, Koo MS, and Chung KS (1994) Effect of storage temperature on the physicochemical characteristics in kochujang (red pepper soybean paste). Korean J Food Sci Technol 26, 300-4.
  21. Shin DH, Ahn EY, Kim YS, and Oh JA (2000) Fermentation characteristics of kochujang containing horseradish or mustard. Korean J Food Sci Technol 32, 1350-7.
  22. Thomas YD, Lulvwes WJ, and Kraft AA (1981) A convenient surface plate method for bacteriological examination of poultry. J Food Sci 46, 1951-2. https://doi.org/10.1111/j.1365-2621.1981.tb04528.x
  23. Yun YS, Kim KS, and Lee YN (1999) Antibacterial and antifungal effect of chitosan. J Chitin Chitosan 4, 8-14.