Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effect of Mixing Ratio on Rheological Properties of Kochujang

배합비를 달리한 고추장의 레올로지 특성

  • Published : 2003.02.01
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Abstract

찹쌀가루와 메주가루의 배합비율(무게비)을 달리한 고추장(찹쌀가루 : 메주가루 = 1:1, 1:2, 1:3, 2:1, 3:1)의 숙성 중 품질 변화를 평가하기 위해 12주 동안 숙성시키면서 고추장의 이화학적 특성, 효소 활성 및 레올로지 특성을 연구하였다. 숙성 중 고추장의 수분함량은 $47.4{\sim}47.9%$에서 점차 증가하여 8주에는 최대 수분함량을 보였다. 환원당 함량은 $2{\sim}4$주에 가장 높았으며 이후에서는 점차 감소하는 경향을 보였다. 아미노태 질소 함량은 지속적으로 증가하였다. ${\alpha}-amylase$와 ${\beta}-amylase$ 활성은 숙성 $2{\sim}4$주에 최대 역가를 나타냈다. Acidic protease와 neutral protease는 각각 숙성 2주와 4주에 가장 높은 활성을 보였다. Power law 모델에 의한 유동성 측정에서 고추장은 낮은 유동성지수(flow behavior index, $n=0.21{\sim}0.36$)를 가진 전단담화(shearing-thinning)거동을 보여주었으며, 점조도 지수(consistency index, K)와 겉보기점도 $({\eta}_{a,10})$는 숙성 2주에 급격히 증가하고 이후에는 감소하였다. Casson 모델식에 의한 항복응력$({\sigma}_{oc})$은 숙성 2주에 급격히 증가하고 이후에는 감소하였다. 동적 점탄성 측정에서는 저장 탄성률 (G#)이 손실탄성률 (G') 보다 높은 수치를 나타내었고 주파수(frequency, ${\omega}$)가 증가함에 따라 증가하는 경향을 보여주었다. 또한 숙성기간이 경과함에 따라 (G#)과 (G@)이 증가하는 경향을 나타냈다.

Keywords

References

  1. Oh, H.I., Shon, S.H. and Kim, J.M. Changes in microflora and enzyme activities of kochujang prepared with Aspergillus oryzae, Bacillus liheniformis and Saccharomyces rouxii during fermentation. Korean J. Food Sci. Technol. 32: 410-416 (2000)
  2. Kim, Y.J. and Yoo, B.S. Rheological properties of traditional kochujang. Korean J. Food Sci. Technol. 32: 1313-1318 (2000)
  3. Kim, M.S., Oh, J.A., Kim, I.W., Shin, D.H. and Han, M.S. Fermentation properties of irradiated kochujang. Korean J. Food Sci. Technol. 30: 934-940 (1998)
  4. Shin, D.H., Kim, D.H., Choi, U., Lim, M.S. and An, E.Y. Changes in microflora and enzymes activities of traditional kochujang prepared with various raw material. Korean J. Food Sci. Technol. 29: 901-906 (1997)
  5. Shin, D.H., Kim, D.H., Choi, U., Lim, M.S. and An, E.Y. Physicochemical characteristics of traditional kochujang prepared with various raw material. Korean J. Food Sci. Technol. 29: 907-912 (1997)
  6. Shin, D.H., Kim, D.H., Choi, U., Lim, M.S. and An, E.Y. Taste components of traditional kochujang prepared with various raw materials. Korean J. Food Sci. Technol. 29: 913-918 (1997)
  7. Kim, M.S., Kim, I.W., Oh, J.A. and Shin, D.H. Quality changes of traditional kochujang prepared with different meju and red pepper during fermentation. Korean J. Food Sci. Technol. 30: 924-933 (1998)
  8. Park, W.P. Quality changes of kochujang with different mixing ratio of raw starch materials during aging. J. Korean Soc. Food Sci. Nutr. 22: 433-436 (1993)
  9. Park, J.M. and Oh, H.I. Changes in microflora and enzyme activity of traditional kochujang meju during fermentation. Korean J. Food Sci. Technol. 27: 56-62 (1995)
  10. Lee, J.S., Kwon, S.J., Chung, S.W., Choi, Y.J., Yoo, J.Y. and Chung, D.H. Changes of microorganisms, enzyme activitis and major components during the fermentation of Korean traditional doenjang and kochujang. Korean J. Appl. Microbiol. Biotechnol. 24: 247-253 (1996)
  11. Oh, H.I. and Park, J.M. Changes in microflora and enzyme activities of traditional kochujang prepared with a meju of different fermentation period during aging. Korean J. Food Sci. Technol. 29: 1158-1165 (1997)
  12. Oh, H.I. and Park, J.M. Changes in quality characteristics of traditional kochujang prepared with a meju of different fermentation period during aging. Korean J. Food Sci. Technol. 29: 1166-1174 (1997)
  13. Choi, J.Y., Lee, T.S. and Noh, B.S. Quality characteristics of kochujang prepared with mixture of meju and koji during fermentation. Korean J. Food Sci. Technol. 32: 125-131 (2000)
  14. Lee, K.Y., Kim, H.S., Lee, H.G., Han, O. and Chang, U.J. 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: 588-594 (1997)
  15. Shin, D.H., Kim, D.H., Choi, U., Lim, M.S. and An, E.Y. Effect of red pepper varieties on the physicochemical characteristics of traditional kochujang during fermentation. Korean J. Food Sci. Technol. 26: 1044-1049 (1997)
  16. Oh, H.I., Shon, S.H. and Kim, J.M. Physicochemical properties of kochujang prepared with Aspergillus oryzae. Bacillus liheniformis and Saccharomyces rouxii during fermentation. Korean J. Food Sci. Technol. 29: 357-363 (2000)
  17. Shin, D.H., Kim, D.H., Choi, U., Lim, D.K. and Lim, M.S. Studies on taste components of traditional kochujang. Korean J. Food Sci. Technol. 28: 152-156 (1996)
  18. Yoo, B.S., Choi, W.S. and Ryu, Y.K. Flow properties of traditional kochujangn: Effect of fermentation time. J. Korean Soc. Food Nutr. 28: 554-558 (1999)
  19. Yoo, B.S. and Choi, W.S. Effect of fermentation time on rheological properties of kochujang in steady and dynamic shear. Food Sci. Biotechnol. 8: 300-304 (1999)
  20. Yoo, B.S. and Noh, W.S. Effect of fermentation temperature on rheological properties of traditional kochujang. J. Korean Soc. Food Nutr. 29: 860-864 (2000)
  21. Chang, Y.H. and Yoo, B.S. Yield stress of kochujang with vane method. Korean J. Food Sci. Technol. 32: 974-978 (2000)
  22. Yoo, B.S. and Kim, Y.J. Flow properties of kochujang using back extrusion method. Food Sci. Biotechnol. 9: 285-287 (2000)
  23. Yoo, B.S. and Lee, S.M. and Chang, Y.H. Rheological properties of kochujang as affected by the particle size of red pepper powder. Food Sci. Biotechnol. 10: 311-314 (2001)
  24. Kabayashi, T. and Tabuchi, T. A method empolying a tribasic sodium phosphate buffered reagent for estimating seim-micro quantities of reducing sugars. J. Agri. Chem. Soc. Japan 28: 171-180 (1954)
  25. AOAC. Official Method of Analysis, 15th ed. The Association of Official Analytical Chemists, Washington, DC, USA (1990)
  26. Rao, M.A. and Steffe, J.P. Measuring yield stress of fluid foods. Food Technol. 51(2): 50-52 (1997)