Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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Swelling and Pasting Properties of Non-Waxy Rice Flour/Food Gum Systems

  • Song, Ji-Young (Department of Food and Nutrition and Biofood Research Center, Chonnam National University) ;
  • An, Young-Hyun (Department of Food and Nutrition and Biofood Research Center, Chonnam National University) ;
  • Kim, Jae-Suk (Department of Food and Nutrition and Biofood Research Center, Chonnam National University) ;
  • Choi, Jung-Do (School of Life Sciences and Biotechnology Research Institute, Chungbuk National University) ;
  • Kim, Young-Chang (School of Life Sciences and Biotechnology Research Institute, Chungbuk National University) ;
  • Shin, Mal-Shick (Department of Food and Nutrition and Biofood Research Center, Chonnam National University)
  • Published : 2006.04.30
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Abstract

The effects of gellan gum (from S. paucimobilis), EPS-CB (exopolysaccharide from S. chungbukensis), and a series of commercial gums (arabic gum, xanthan gum, guar gum, deacyl gellan gum), on the swelling, rheological, and pasting properties of non-waxy rice flour dispersions were investigated. The swelling properties of rice flours in gellan or guar gum dispersion after heating were found to have increased with increasing gum concentrations, but the swelling properties of rice flour/other gum systems decreased with increasing concentrations. The rice flour/gum mixtures showed high shear-thinning flow behavior (n=0.14-0.32), and consistency index (K) was higher in guar gum than other gum dispersions. The initial pasting temperatures and peak times increased along with increasing gum concentration. The peak viscosity of rice flour increased in guar gum and deacyl gellan dispersions, and the breakdown and setback viscosity of the rice flour paste was lowest in the xanthan gum system, but remained higher than those of the control. The apparent viscosities of the rice flour/gellan gum mixture pastes were the highest among the tested combinations.

Keywords

References

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