Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Characteristics of Rice Flours Prepared by Moisture-Heat Treatment

수분-열처리에 의해 제조한 멥쌀가루의 특성

  • Lee Mi-Kyung (Department of Food and Nutrition, Kwangju Health college) ;
  • Shin Mal-Shick (Department of Food and Nutrition, Chonnam National University)
  • Published : 2006.04.01
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Abstract

To improve the properties of non-waxy rice flours for baking, soaked-wet milled rice flour (SWRF) was adjusted moisture content (MC) to 30 and 50 % and heated at 50 and $70^{\circ}C$ in a shaking water bath for 6 and 18 hrs, respectively. Moisture-heat treated rice flours were investigated with regard to particle size distribution, and morphological, physicochemical and pasting properties for comparing dry and wet milled flours. The particle size of rice flour treated with 30% MC was distributed between $4-20{\mu}m\;and\;100-200{\mu}m$, like SWRF. The particles above $200{\mu}m$ in the flour were produced at higher heating temperature. By SEM, starch granules were found in the rice flours treated with 30% MC, who whereas aggregated starch granules were shown in the flours treated with 50% MC. Moisture-heat treatment using higher MC and heating temperature decreased the lightness and increased the yellowness of non-waxy rice flours. Water binding capacity of 30% moisture treated rice flour was similar to that of SWRF. In the same moisture treated rice flour, swelling power was higher, but solubility was lower at $50^{\circ}C$ than at $70^{\circ}C$. The initial pasting temperature by RVA increased after moisture-heat treatment. The peak viscosity of moisture-heat treated rice flour was higher for 30% moisture than that of the others. The rice flour treated with 30% MC and heated at $50^{\circ}C$ showed low setback and increased stability for retrogradation.

멥쌀가루의 특성을 개선하여 제빵을 비롯한 가공 적성을 증가하기 위해 습식제분쌀가루를 이용하여 수분함량을 30%와 50%로 조절하고, 50과 $70^{\circ}C$로 6시간과 18시간 열처리하여 수분-열처리 쌀가루를 제조하였다. 제조한 수분-열처리 쌀가루의 특성인 입도분포, 형태적, 이화학적특성과 호화특성을 건식제분과 습식제분 쌀가루와 비교하였다. 30% 수분함량으로 처리한 쌀가루입자는 습식제분쌀가루와 같이 $4-20{\mu}m$와 $100-200{\mu}m$ 범위에 분포하였으며 열처리온도가 증가하면 $200{\mu}m$이상의 입자가 형성되었다. 주사전자현미경으로 형태를 보면 30% 수분으로 처리한 경우에는 전분입자를 뚜렷하게 볼 수 있었으나 50%로 처리한 쌀가루는 쌀가루 입자끼리 엉겨 붙거나 호화된 상태를 보여주었다. 색도는 수분함량과 열처리온도가 높은 경우 명도는 감소하고 황색도는 증가하였으며 30% 수분함량으로 처리한 쌀가루의 물결합능력은 SWRF와 비슷하였다. $70^{\circ}C$에서 쌀가루의 팽윤력은 수분함량에 따른 차이는 없었으며 같은 수분함량에서 열처리 온도가 낮은 $50^{\circ}C$일 때 더 높았고 용해도는 더 낮았다. 신속점도 측정기에 의한 호화개시온도는 수분-열처리로 모두 높아졌으며 최고점도는 30%로 처리한 쌀가루가 높았고 setback은 30%로 $50^{\circ}C$에서 처리하였을 때 낮아 노화에 안정성을 보였다. 그러므로 수분함량을 30%로 조절하고 호화온도 이하의 온도인 $50^{\circ}C$로 처리한 수분-열처리 쌀가루의 특성이 쌀가루의 가공용으로 습식제분쌀가루보다 개선된 것으로 생각되었다.

Keywords

References

  1. AOAC. 1995. Official Methods of Analysis, 16th ed., Association of Official Analytical Chemists, Washington, DC
  2. Bean MM, Elliston-Hoops EA, Nishita KD. 1983. Rice flour treatment for cake baking applications. Cereal Chem 60: 445-449
  3. Chaudhary VK. 1981. Relation of cultivar and flour particle size distribution to cake volume. Cereal Chem 58: 314-316
  4. Chiang PY, Yeh AI. 2002. Effects of soaking on wet-milling of rice. J Cereal Sci 35: 85-94 https://doi.org/10.1006/jcrs.2001.0419
  5. Choi CR. 2002. The properties of rice flours and Garedduk with resistant starches. Ph. D Thesis Chonnam National University
  6. Donovan JW, Lorenz K, Kulp K. 1983. Differential scanning calorimetry of heat-moisture treated wheat and potato starches. Cereal Chem 60: 381-387
  7. Esau K. 1977. Anatomy of seed plants. 2nd ed. John Wiley & Sons Inc. USA
  8. Halick JV, Kelly VJ. 1959. Gelatinization and pasting characteristics of rice varieties as related to cooking behavior. Cereal Chem 36: 91-98
  9. Hoover R, Vasanthan T. 1994. Effect of heat-moisture treatment on the structure and physicochemical properties of cereal, legume and tuber starches. Carbohydr Res 252: 33-53 https://doi.org/10.1016/0008-6215(94)90004-3
  10. Juliano BO. 1985. Polysaccharides, proteins, and lipids In: Rice Chemistry and Technology Juliano BO (ed.), AACC, MN, USA
  11. Juliano BO. 1985. Production and utilization of rice. pp 4-7. In: Rice Chemistry and Technology. Juliano BO (ed). AACC, MN, USA
  12. Kang MY, Koh HJ, Han JY. 2000. Comparison of some characteristics relevant to rice bread made from eight varieties of endosperm mutants between dry and wet milling process. Korean J Food Sci Technol 32: 75-81
  13. Kim HYL, Lee IS, Kang JY, Kim GY. 2002. Quality characteristics of cookies with various levels of functional rice flour. Korean J Food Sci Technol 34: 642-646
  14. Kim JO, Shin MS. 2000. Effect of sugar on the textural properties of Injulmi made from waxy rice flours by different milling methods. Korean J Human Ecology 3: 68-76
  15. Kim K, Lee YH, Kang KJ, Kim SK. 1993. Effects of steeping on physicochemical properties of waxy rice. Korean J Food Sci Technol 25: 535-540
  16. Kim KA, Jeon ER. 1996. Physicochemical properties and hydration of rice on various polishing degrees. Korean J Food Sci Technol 28: 959-964
  17. Kim KO, Choi HJ. 1995. Optimization of the preparation of rice-based infant foods using freeze drying process. Korean J Food Sci Technol 27: 680-689
  18. Kim MH, Park MW, Park YK, Jang MS. 1993. Physicochemical properties of rice flours as influenced by soaking time of rice. Korean J Soc Food Sci 9: 210-214
  19. Kim SK, Bang JB. 1996. Physicochemical properties of rice affected by steeping conditions. Korean J Food Sci Technol 28: 1026-1032
  20. Kim SS, Kang KA, Choi SY, Lee YT. 2005. Effect of elevated steeping temperature on properties of wet-milled rice flour. J Korean Soc Food Sci Nutr 34: 414-419 https://doi.org/10.3746/jkfn.2005.34.3.414
  21. Kim YI, Kum JS, Lee SH, Lee HY. 1995. Retrogradation characteristics of Jeungpyun by different milling method of rice flour. Korean J Food Sci Technol 27: 834-838
  22. Kohlwey DE, Kendall JH, Mohindra RB. 1995. Using the physical properties of rice as a guide to formulation. Cereal Foods World 40: 728-732
  23. Kulp K, Lorenz K. 1981. Heat-moisture treatment of starches I. Physicochemical properties. Cereal Chem 58: 46-52
  24. Kum JS, Lee SH, Kim KH, Kim YI. 1993. Effects of different milling methods on physicochemical properties & products. Korean J Food Sci Technol 25: 546-551
  25. Leach HW, McCowen LD, Schoch TJ. 1959. Structure of starch granule. I. Swelling and solubility patterns of various starches. Cereal Chem 36: 534-544
  26. Lee MK, Kim JO, Shin MS. 2004. Properties of nonwaxy rice flours with different soaking time and particle sizes. Korean J Food Sci Technol 36: 268-275
  27. Lee SH. 2002. Properties of rice flours and starches prepared by dry and wet milling of soaked rice grains. Master Thesis Chonnam National University
  28. Lee YH, Ku JS, Ku KH, Chun HS, Kim WJ. 2001. Changes in chemical composition of glutinous rice during steeping and quality properties of Yukwa. Korean J Food Sci Technol 33: 737-744
  29. Lee YT, Kim SS. 2004. Effect of elevated steeping temperature on the starch properties of stored milled rice. Food Sci Biotechnol 13: 332-336
  30. Medcalf DG, Gilles KA. 1965. Wheat starch. I. Comparison of physicochemical properties. Cereal Chem 42: 558-568
  31. Montgomery EM, Senti FR. 1958. Separation of amylose from amylopectin of starch by an extraction, sedimentation procedure. J Polym Sci 28: 1-9 https://doi.org/10.1002/pol.1958.1202811601
  32. Mun SH, Bae CH, Shin MS. 2002. RS levels and characteristics of retrograded maize starches with heat -moisture treatment. Food Sci Biotechnol 11: 350-354
  33. Nishita KD, Bean MN. 1982. Grinding methods: Their impart on rice flour properties. Cereal Chem 59: 46-49
  34. Nishita KD, Roberts RL, Bean MM, Kennedy BM. 1976. Development of a yeast-leavened rice-bread formula. Cereal Chem 53: 626-635
  35. Oh SH, Oh CH. 2003. Brown rice extraction with enhanced levels of GABA stimulate immune cells. Food Sci Biotechnol 12: 248-252
  36. Park YK, Seog HM, Nam YJ, Shin DW. 1988. Physicochemical properties of various milled rice flours. Korean J Food Sci Technol 20: 504-510
  37. Sair L. 1967. Heat-moisture treatment of starch. Cereal Chem 44: 8-26
  38. Schoch TJ. 1964. Swelling power and solubility of granular starches. pp 106-108 In Method in Carbohydrate Chemistry. Vol 4. Whistler RL ed. Academic Press. New York
  39. Shin MS, Kim JO, Lee MK. 2001. Effect of soaking time of rice and particle size of rice flours on the properties of nonwaxy rice flours soaking at room temperature. Korean J Soc Food Cookery Sci 17: 309-315
  40. Song JC, Park HJ. 2003a. Functions of various hydrocolloids as anticaking agents in Korean rice cakes. J Korean Soc Food Sci Nutr 32: 1253-1261 https://doi.org/10.3746/jkfn.2003.32.8.1253
  41. Song JC, Park HJ. 2003b. Effect of starch degradation enzymes on the retrogradation of a Korean rice cakes. J Korean Soc Food Sci Nutr 32: 1262-1269 https://doi.org/10.3746/jkfn.2003.32.8.1262
  42. Takahashi T, Miura M, Ohisa N, Mori K, Kobayashi S. 2005. Heat treatments of milled rice and properties of the flours. Cereal Chem 82: 228-232 https://doi.org/10.1094/CC-82-0228
  43. Williams C, Kuzina FD, Hlynka I. 1970. A rapid colorimetric procedure for estimating the amylose content of starches and flours. Cereal Chem 47: 411-421
  44. Yamazaki WT, Donelson DH. 1972. The relationship between flour particle size and cake volume potential among estern soft wheats. Cereal Chem 49: 649-653
  45. Yoo SH, Kim SK. 2004. Physicochemical properties of rice differing in milling degrees. Food Sci Biotechnol 13: 57-62