Non-Newtonian Characteristics of Gochujang and Chogochujang at Different Temperatures

  • Choi, Ji Eun ;
  • Lee, Jun Ho
  • Received : 2016.11.18
  • Accepted : 2017.01.02
  • Published : 2017.03.31


This study was conducted to determine the rheological properties of gochujang and chogochujang at different temperatures (25, 35, and $45^{\circ}C$). Rheological properties of the samples were determined using a rotational rheometer at a shear range of 1 to $40s^{-1}$. Gochujang and chogochujang were found to be non-Newtonian fluids according to the Herschel-Bulkley model. Yield stress and consistency coefficient of gochujang at different temperatures were higher than those of chogochujang, whereas the opposite was observed for flow behavior index. Moreover, all rheological properties of gochujang and chogochujang decreased with increasing temperature. The consistency coefficient was related to temperature using an Arrhenius-type relationship. Gochujang (14.48 kJ/mol) had slightly higher activation energy than chogochujang (14.03 kJ/mol).


gochujang;chogochujang;non-Newtonian;Herschel-Bulkley model;activation energy


  1. Shin D, Jeong D. 2015. Korean traditional fermented soybean products: Jang. J Ethnic Foods 2: 2-7.
  2. Chung KR, Yang HJ, Jang DJ, Kwon DY. 2015. Historical and biological aspects of bibimbap, a Korean ethnic food. J Ethnic Foods 2: 74-83.
  3. Jang DJ, Lee AJ, Kang SA, Lee SM, Kwon DY. 2016. Does siwonhan-mat represent delicious in Korean foods?. J Ethnic Foods 3: 159-162.
  4. Keshani S, Chuah AL, Russly AR. 2012. Effect of temperature and concentration on rheological properties pomelo juice concentrates. Int Food Res J 19: 553-562.
  5. Lopes AS, Mattietto RA, Menezes HC, Silva LHM, Pena RS. 2013. Rheological behavior of Brazilian cherry (Eugenia uniflora L.) pulp at pasteurization temperatures. Food Sci Technol Campinas 33: 26-31.
  6. Diamante L, Umemoto M. 2015. Rheological properties of fruits and vegetables: a review. Int J Food Prop 18: 1191-1210.
  7. Yoo B, Choi WS. 1999. Effect of fermentation time on rheological properties of kochujang in steady and dynamic shear. Food Sci Biotechnol 8: 300-304.
  8. Yoo B, Lee SM, Chang YH. 2001. Rheological properties of Kochujang as affected by the particle size of red pepper powder. Food Sci Biotechnol 10: 311-314.
  9. Choi SJ, Yoo B. 2006. Rheological effect of gum addition to hot pepper-soybean pastes. Int J Food Sci Technol 41: 56-62.
  10. Choi SJ, Chang HG, Yoo B. 2008. Rheological properties of hot pepper-soybean pastes mixed with acetylated starches. Food Sci Biotechnol 17: 780-786.
  11. Kim YC, Yoo BS. 2000. Rheological properties of traditional kochujang. Korean J Food Sci Technol 32: 1313-1318.
  12. Nooruddin HA, Hossain ME, Al-Yousef H, Okasha T. 2016. Improvement of permeability models using large mercury injection capillary pressure dataset for Middle East carbonate reservoirs. J Porous Media 19: 405-422.
  13. Lee S, Yoo SM, Park BR, Han HM, Kim HY. 2014. Analysis of quality state for Gochujang produced by regional rural families. J Korean Soc Food Sci Nutr 43: 1088-1094.
  14. Isikli ND, Karababa E. 2005. Rheological characterization of fenugreek paste (cemen). J Food Eng 69: 185-190.
  15. Augusto PED, Cristianini M, Ibarz A. 2012. Effect of temperature on dynamic and steady-state shear rheological properties of siriguela (Spondias purpurea L.) pulp. J Food Eng 108: 283-289.
  16. Tamborrino A, Catalano P, Leone A. 2014. Using an in-line rotating torque transducer to study the rheological aspects of malaxed olive paste. J Food Eng 126: 65-71.
  17. Ahmed J, Ramaswamy HS. 2006. Viscoelastic properties of sweet potato puree infant food. J Food Eng 74: 376-382.
  18. Maceiras R, Alvarez E, Cancela MA. 2007. Rheological properties of fruit purees: effect of cooking. J Food Eng 80: 763-769.
  19. Koocheki A, Ghandi A, Razavi SMA, Mortazavi SA, Vasiljevic T. 2009. The rheological properties of ketchup as a function of different hydrocolloids and temperature. Int J Food Sci Technol 44: 596-602.
  20. Guerrero SN, Alzamora SM. 1998. Effects of pH, temperature and glucose addition on flow behaviour of fruit purees: II. Peach, papaya and mango purees. J Food Eng 37: 77-101.
  21. Lokumcu Altay F, Ak MM. 2005. Effects of temperature, shear rate and constituents on rheological properties of tahin (sesame paste). J Sci Food Agric 85: 105-111.
  22. Pardeshi IL, Arora S, Borker PA. 2009. Thin-layer drying of green peas and selection of a suitable thin-layer drying model. Drying Technol 27: 288-295.
  23. Antonio GC, Faria FR, Takeiti CY, Park KJ. 2009. Rheological behavior of blueberry. Cienc Tecnol Aliment 29: 732-737.


Supported by : Daegu University