Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Rheological Properties of Dough Added with Black Rice Flour

흑미가루를 첨가한 밀가루 반죽의 물리적 특성

  • Jung, Dong-Sik (Division of Bioscience and Biotechnology and Institute of Agricultural Science and Technology, Chonnam National University) ;
  • Eun, Jong-Bang (Division of Bioscience and Biotechnology and Institute of Agricultural Science and Technology, Chonnam National University)
  • 정동식 (전남대학교 응용생물공학부 식품공학.농업과학기술연구소) ;
  • 은종방 (전남대학교 응용생물공학부 식품공학.농업과학기술연구소)
  • Published : 2003.02.01
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Abstract

The rheological properties of wheat flour and black rice flour dough were investigated in dough added with 0, 10, 20, and 30% of black rice flour (BRF). Increase in BRF concentration resulted in: decreases in protein and gluten contents, whereas ash content increased; decreases in water absorption, stability, development time, elasticity, and valorimeter value of the dough, whereas increase in weakness of the dough, as revealed through farinogram; low initial pasting temperature and temperature at peak viscosity, and decreases in viscosity at peak point and at $94^{\circ}C$, as revealed through amylogram; decreases in extensibility, resistance to extension, and energy, whereas increase in R/E ratio, as revealed through extensogram.

흑미가루 첨가비율 증가에 따른 반죽의 물리적인 특성을 조사한 결과 흑미가루 첨가량을 증가시켰을 때 회분 함량은 증가하였고 단백질 함량과 gluten 함량은 감소하였다. farino-graph는 흑미가루 첨가량이 증가함에 따라 흡수율, 안정도, 반죽형성시간, 탄력도 및 v/v(valorimeter value)값은 감소하였고 약화도는 증가하여 반죽 시간 및 반죽의 탄력성과 신장성이 감소하였다. Amylograph는 호화개시온도, 최고점도에서의 온도는 낮았으나 최고점도 및 $94^{\circ}C$에서의 점도의 감소로 제빵시 ${\alpha}-amylase$의 활성을 높임으로써 발효능력의 향상을 가져왔다. Extensograph는 신장도, 신장저항도 및 에너지는 감소하였으나 R/E비는 높아짐으로써 제빵성은 흑미가루 첨가량이 증가할수록 낮아졌다. 상기 실험결과 farinograph와 amylograph, extensograph의 측정은 밀가루 중에 함유된 gluten의 신장성 및 신장저항성의 특성, 발효에 따른 발효력 및 가스포집력을 종합한 제빵 특성을 나타내므로 흑미가루가 혼합된 혼합분의 경우 밀가루 100% 시료보다는 단백질 함량의 저하로 제빵 특성치가 낮게 나타나 제빵 특성에 영향을 주므로 단백질원인 활성글루텐이나 산화제 등의 첨가로 반죽의 물성 개선에 관한 실험과 제빵 품질 특성에 대한 실험이 계속 필요하리라 생각된다.

Keywords

References

  1. Lee, F.Z. Studies on heredity of pigment content in rice pericarp. M.S. thesis, Yanbian National Univ., China (1996)
  2. Defa, G. and Xu, M. A study on special nutrient of purple glutinous rice. Scientia Agric. Sinica 25: 36-41 (1992)
  3. Kang, M.Y., Choi, Y.H. and Nam, S.H. Inhibitory mechanism of colored rice bran extract against mutagenicity induced by chemical mutagen mitomycin c. Korean J. Soc. Agric. Chem. Biotechnol. 39: 424-429 (1996)
  4. Nam, S.H. and Kang, M.Y. Comparison of inhibitory effect of rice bran extracts of the colored rice cultivars on carcinogenesis. Korean J. Soc. Agric. Chem. Biotechnol. 41: 78-83 (1998)
  5. Yoon, H.H., Paik, Y.S., Kim, J.B. and Hahn, T.R. Identification of anthocyanins from Korean pigmented rice. Korean J. Soc. Agric. Chem. Biotechnol. 38: 581-583 (1995)
  6. Cho, M.H., Yoon, H.H., and Hahn, T.R. Thermal stability of the major color component cyanidin 3-glucoside, from a Korean pigmented rice variety in aqueous solution. Korean J. Soc. Agric. Chem. Biotechnol. 39: 245-248 (1996)
  7. Yoon, J.M., Cho, M.H., Hahn, T.R., Paik, Y.S. and Yoon, H.H. Physicochemical stability of anthocyanins from a Korean pigmented rice variety as natural food colorants. Korean J. Food Sci. Technol. 29: 211-217 (1997)
  8. Kim, J.D. Physicochemical characteristics of black rice varieties and puffing of rice cake using black rice and medium-grain brown rice. M.S. thesis, Chonnam National Univ., Gwangju (1998)
  9. Lee, F.Z. and Eun, J.B. Manufacturing of microwavable black rice gruel with black rice, waxy rice, and nonwaxy rice. 10th World Congress of Food Sci. & Technol. 3-8 October, 3-8, Sydney, Austria (1999)
  10. American Association of Cereal Chemists (AACC): Approved methods, The Association, St. Paul. Minnesota, USA (1985)
  11. Kim, S.K. Milling Industry and Flour Utilization. pp. 45-46. Korea Wheat and Industry Association, Seoul (1990)
  12. Kim, H.K and Kim, S.K. Wheat and Milling Industry. p. 167. Korea Wheat and Industry Association, Seoul (1985)
  13. Song, J. C. and Park, H. C. Food Texture and Rheology. p. 681. University of Ulsan Press, Ulsan (1995)
  14. Bennett, R.E. Baking Science Laboratory. 2ed. III, p. 459. American Association of Cereal Chemists, St. Paul, MN, USA (1985)
  15. Kim, S.K. Milling Industry and Flour Utilization. pp. 164. 181-191. Korea Wheat and Industry Association, Seoul (1990)
  16. Kim, S.K. Milling Industry and Flour Utilization. p. 164. Korea Wheat and Industry Association, Seoul (1990)
  17. Lee, C.Y., Kim, S.K. and Marston, P.E. Rheological and baking studies of rice-wheat flour blends. Korean. J. Food. Sci. Technol. 11: 99-104 (1979)
  18. Pomeranz, Y. Wheat Chemistry and Technology. 2ed. III, p. 459. American Association Chemists, St. Paul, MN, USA (1985)
  19. Kim, S.K. Milling Industry and Flour Utilization. p. 173. Korea Wheat and Industry Association, Seoul (1990)
  20. Chung, J.Y. and Kim, C.S. Developement of buck-wheat bread. Effects of vital gluten and water-soluble gums on dough rheological properties. Korean J. Food Sci. Technol. 14: 140-147 (1998)
  21. Hoseney, R.C., Hsu, K.H. and Junge, R.C. A simple spread test to measure the rheological properties of fermenting dough. Cereal Chem. 56: 141 (1979)
  22. Kim, S.K. Milling Industry and Flour Utilization. pp. 191-194. Korea Wheat and Industry Association, Seoul (1990)
  23. Kim, Y.H., Choi, K.S., Son, D.H. and Kim, J.H. Rheological properties of dough with whole wheat flour. Korean J. Soc. Food Sci. Nutr. 25: 817-823 (1996)