Soaking Properties and Quality Characteristics of Korean white Gruel with Different Blending Time of High-Dietary Fiber Rice'Goami 2'

고아미 2호의 수침특성 및 마쇄 시간을 달리한 흰 죽의 품질 특성

  • Hwang InKyeong (Department of Food Nutrition) ;
  • Lee Ji Hyun (Department of Food Nutrition, Research Intitute of Human Ecology, Seoul National University) ;
  • Seo Han-Seok (Department of Food Nutrition, Research Intitute of Human Ecology, Seoul National University) ;
  • Kim Soo Hee (Department of Food Nutrition, Research Intitute of Human Ecology, Seoul National University) ;
  • Lee Jung-Ro (National Institute of Agricultural Biotechnology)
  • 황인경 ;
  • 이지현 (서울대학교 식품영양학과, 생활과학연구소) ;
  • 서한석 (서울대학교 식품영양학과, 생활과학연구소) ;
  • 김수희 (서울대학교 식품영양학과, 생활과학연구소) ;
  • 이정로 (농업 생명공학 연구원)
  • Published : 2005.12.01

Abstract

The objectives of this study were to investigate the soaking properties of the high-dietary fiber rice 'Goami 2'and to develop korean white Gruel prepared with Goami 2. With increasing soaking time at room temperature ($20^{\circ}C$), the water absorbing character of Goami 2 and Ilpum significantly increased during the first hour of soaking time, after which it remained constant. On the contrary, the hardness of Goami 2 and Ilpum significantly decreased with increasing soaking time until one hour, after which it remained constant. The properties of Korean white gruel were evaluated using two varieties of rice (Goami 2, Ilpum) and three blending times (10, 20 and 30 seconds respectively). The rice flour of Goami 2 for Korean white gruel showed a greater number of small particles (<20 $\mu$m) than that of Ilpum. Hunter a'and b'values of Korean white gruel prepared with Goami 2 were higher than that of Korean white gruel prepared with Ilpum. The consistency values on Bostwick consistometer of Korean white gruel prepared with Goami 2 were higher than those of Korean white gruel prepared with Ilpum. The texture of Korean white gruel was examined using a back extrusion rig. All of the rheological parameters of Korean white gruel prepared with Goami 2 were decreased with increasing blending time, while in llpum they were increased. In the sensory evaluation results, the overall acceptability of korean white gruel prepared with Goami 2 blended for 20sec showed the highest sensory scores and desirability.

본 연구에서는 고섬유소 품종인 고아미 2호의 수침 특성을 알아보고 이를 기반으로 흰죽의 제조 조건을 도출하여 기능성 식품으로의 활용 가능성을 알아보았다. 수침시 상온($20^{\circ}C$)에서 고아미 2호와 일품벼의 수분흡수율이 수침 1 시간까지는 유의적으로 증가하는 경향을 보였으나(p<0.01) 그 이후 더 이상 증가하지 않았다. 마쇄한 쌀의 입자분석을 한 결과 고아미 2호가 일품벼에 비해 마쇄가 용이함을 알 수 있었다. 흰죽을 제조하여 기계적인 특성을 분석한 결과 적색도(a), 황색도(b)는 고아미 2호로 제조한 흰죽이 일품벼로 제조한 흰죽에 비해 높았다. Bostwick consistometer로 측정시 고아미 2호로 제조한 흰죽이 일품벼로 제조한 흰죽에 비해 점조성이 높고 마쇄 시간을 증가할수록 점조성이 낮아진다는 것을 알 수 있었다. 또한 마쇄 시간을 증가할수록 고아미 2호로 제조한 흰죽의 경우 물성특성이 증가되는 반면 일품벼로 제조한 흰죽은 물성 특성이 감소하는 경향을 보였다. 관능 평가 결과 고아미 2호를 20 초 마쇄할 경우 전반적인 수응도가 가장 높았으며 일품벼와 유의적인 차이를 보이지 않았다. 따라서, 고아미 2호로 취반한 경우 기능성은높으나 수응도가 낮은 경향이 있는데 위와 같은 죽의 형태로 제공한다면 장기적인 섭취를 유도할 수 있을 것으로 사료된다.

Keywords

References

  1. 농촌진흥청. 1996. 쌀의 조리가공 및 식미평가기술 개발. 농촌진흥청 보고서. pp 15-23
  2. 승정자. 1995. 심포지움: 건강 및 기능성식품; 식이섬유의 생리활성과 이용. 식품과학과 산업 28(3): 2-23
  3. 홍성철. 2000. 세상에서 배우고 싶은 모든 요리. 쿠켄. 서울. pp 122-123
  4. Alviar MS, Reid DS. 1990. Determination of Theological behavior of tomato concentrates using back extrusion. J Food Sci 55(2):554-5 https://doi.org/10.1111/j.1365-2621.1990.tb06809.x
  5. Bean MM. 1986. Rice flour, its functional variations. Cereal Foods World 31: 477
  6. Bourne MC. 1982. Food texture and viscosity. Academic press. New York. (Second edited 1994) 213-215
  7. Chiang PY, Yeh AI. 2002. Effect of soaking on wet-milling of rice. J Cereal Sci. 35: 85-94 https://doi.org/10.1006/jcrs.2001.0419
  8. Cock P, Vanhemelrijick 1995. J. Predictive rheology for texture design of starch-based emulsified sauces. Europe: Conference Proceedings, Ed. by Boot, E., Frankfurt, pp. 215-221
  9. Herman HF, James EW, Szczesniak AS. 1963. The texturometer-a new instrument for objective texture measurement. J Food Sci. 28: 390-396 https://doi.org/10.1111/j.1365-2621.1963.tb00216.x
  10. Jang MS, Kim SK, Kim BN. 1989. Kinetics studies of hydration of olchal and hankangchlallbyeo waxy rices. Korean J Food Sci Technol. 21: 313-319
  11. Juliano BO. 1985. Rice: chemistry and technology. The American Association of Cereal Chemists, Inc.. Minnesota, pp 428-430
  12. June JH, Yoon JY, Kim HS. 1998. A study on the development of 'Hodojook'. Korean J Dietary Culture. 13(5): 509-518
  13. Kang HJ. 2004a. Varietal differences in physicochemical properties and ultrastructure of rice and their relationship with gelatinization and retrogradation characteristics. Docteral thesis. The Seoul National University, pp 131-135, 159, 163-164
  14. Kang HJ, Seo HS, Hwang IK. 2004b. Comparison of gelatinization and retrogradation characteristics among endosperm mutant rices derived from Ilpumbyeo. Korean J Food Sci Technol. 36(6): 879-884
  15. Kye SK. 1996. Water binding capacity of vegetable fiber. Korean J Food Nutri. 9(3): 231-235
  16. Kum JS, Choi BK, Lee HY, Park JD, Park HJ. 2004. Physicochemical properties of germinated brown rice. Korean J of Food Preservation 11(2): 182-188
  17. Lee C, Shin JS. 2002. The effect of dietary fiber content of rice on the postprandial serum glucose response in normal subject. Korean J Food Nutri. 15(2): 173-177
  18. Lee GD, Kim HG, Kin JG, Kwno JH. 1997. Optimization for the preparation conditions of instant rice gruel using oyster mushroom and brown rice. Korean J Food Sci Technol. 29(4): 737-744
  19. Lee MG, Kim JO, Sin MS. 2004. Properties of nonwaxy rice flours with different soaking time and particle sizes. Korean J Food Sci Technol. 36(2): 268-275
  20. Medcalf F, Gilles KA. 1965. Comparison of physicochemical properties. Cereal Chem. 42: 558-568
  21. Oh SJ, Sim JH, Hur JK, Shin JG, Kim SK, Baek YJ. 1993. Prediction of sensory properties for. the stirred-type fruits yogurts by instrumental measurement. Korean J Food Sci Technol. 25(6): 620-625
  22. Song J, Song JC, Kim SL, Hwang JJ, Hong HC, Lim SJ. 2000. Comparison of quality characteristics of some endosperm mutant rices. Korean J Breed. 32(2): 199-204
  23. Yun YJ, Kim K, Kim SK, Kim DY, Park YK. 1988. Hydration rates and changes of hardness during soaking of polished naked barleys. J Korean Agric Chem. Soc. 31(1): 12-25