Dynamic Rheological Studies on Mixtures of Hot Pepper-Soybean Paste and Xanthan Gum

  • Choi, Su-Jin (Department of Food Science and Technology, Dongguk University) ;
  • Yoo, Byoung-Seung (Department of Food Science and Technology, Dongguk University)
  • Published : 2007.02.28

Abstract

Dynamic rheological properties of hot pepper-soybean paste (HPSP) mixed with xanthan gum were evaluated at different gum concentrations (0.3, 0.6, and 0.9%) and fermentation times (12 and 24 week). Magnitudes of storage (G') and loss moduli (G") in the HPSP-xanthan gum mixture systems increased with an increase in frequency ($\omega$), while complex viscosity (${\eta}^*$) decreased. G' values were higher than the G" values over most of the frequency range (0.63-63 rad/sec), and were frequency-dependent. The dynamic moduli (G', G", and ${\eta}^*$) of the HPSP-xathan mixtures were lower than those of the control (0% gum). The differences between the dynamic moduli values at 12-week and 24-week fermentation decreased with increasing gum concentration, showing that xanthan gum can be used to stabilize and improve the viscoelastic rheological properties of HPSP. The G' value of the HPSP-xathan mixtures increased with an increase in gum concentration from 0.3 to 0.9%, whereas the G" decreased. The ability of xanthan gum to increase the elastic properties in the HPSP-xanthan mixture systems seemed to be the result of the incompatibility phenomena existing between xanthan gum and glutinous rice starch.

Keywords

References

  1. Yoo B, Choi WS. Effect of fermentation time on rheological properties of kochujang in steady and dynamic shear. Food Sci. Biotechnol. 8: 300-304 (1999)
  2. Yoo B, Lee, SM, Chang YH. Rheological properties of kochujang as affected by the particle size of red pepper powder. Food Sci. Biotechnol. 10: 311-314 (2001)
  3. Yoo B. Rheological properties of hot pepper-soybean paste. J. Texture Stud. 32: 307-318 (2001) https://doi.org/10.1111/j.1745-4603.2001.tb01050.x
  4. Choi SJ, Yoo B. Small and large deformation rheological behaviors of commercial hot pepper-soybean pastes. Food Sci. Biotechnol. 15: 871-876 (2006)
  5. Sahin H, Ozdemir F. Effect of some hydrocolloids on the rheological properties of different formulated ketchups. Food Hydrocolloid 18: 1015-1022 (2004) https://doi.org/10.1016/j.foodhyd.2004.04.006
  6. Choi SJ, Yoo B. Rheological effect of gum addition to hot pepper-soybean pastes. Int. J. Food Sci. Technol. 41: 56-62 (2006) https://doi.org/10.1111/j.1365-2621.2006.01377.x
  7. Urlacher B, Noble O. Xanthan. pp. 284-311. In: Thickening and Gelling Agents for Food. Imeson A (ed). Chapman & Hall, London, UK (1997)
  8. Hoefler AC. Hydrocolloid sources, processing, and characterization. pp. 7-25. In: Hydrocolloids. Eagan Press, St. Paul, MN, USA (2004)
  9. Choi SJ, Chun SY, Yoo B. Dynamic rheological comparison of selected gum solutions. Food Sci. Biotechnol. 15: 474-477 (2006)
  10. Alloncle M, Doublier JL. Viscoelastic properties of maize starch/hydrocolloid pastes and gels. Food Hydrocolloid 5: 455-467 (1991) https://doi.org/10.1016/S0268-005X(09)80104-5
  11. Yoshimura M, Takaya T, Nishinari K. Rheological studies on mixtures of corn starch and konjac-glucomannan. Carbohyd. Polym. 35: 71-79 (1998) https://doi.org/10.1016/S0144-8617(97)00232-4
  12. Doublier JL, Cuvelier G. Gums and hydrocolloids: functional aspect. pp. 283-318. In: Carbohydrates in Food. Eliasson AC (ed). Marcel Dekker, New York, NY. USA (1996)
  13. Kim C, Yoo B. Rheological properties of rice starch-xanthan gum mixtures. J. Food Eng. 75: 120-128 (2006) https://doi.org/10.1016/j.jfoodeng.2005.04.002