Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Grinding Method on Flour Quality in Different Rice Cultivars

분쇄 방법이 품종이 다른 쌀가루의 품질에 미치는 영향

  • Han, Hye Min (Dept. of Foods and Nutrition, Keimyung University) ;
  • Cho, Jun Hyeon (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Koh, Bong Kyung (Dept. of Foods and Nutrition, Keimyung University)
  • 한혜민 (계명대학교 식품영양학과) ;
  • 조준현 (농촌진흥청 국립식량과학원 기능성 작물부) ;
  • 고봉경 (계명대학교 식품영양학과)
  • Received : 2012.07.31
  • Accepted : 2012.10.25
  • Published : 2012.11.30
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Abstract

Eight rice cultivars grown in Korea were analyzed to investigate the quality of flour prepared using wet and dry grinding methods. The hardness of the kernel was related with starch damage following dry grinding but not following wet grinding. Although Chenmaai had the hardest steeped kernel, its flour exhibited minimal starch damage, a lower water absorption index (WAI), and a smaller difference between the RVA properties of wet and dry ground flour. However, Seolgan and Suweon517 are soft grains, and their flours had more starch damage and a higher WAI. In general, soft kernels produce better grinding characteristics. However, our wet grinding results indicated that grain hardness was not the main factor affecting the grinding characteristics. Even Chenmaai, with its hard kernels, had good grinding characteristics, whereas the softer kernels of Seolgan and Suweon517 did not show the appropriate grinding characteristics.

국내에서 육종된 8가지 품종의 쌀을 습식과 건식제분하여 제분 방법에 따른 쌀가루의 품질변화를 품종별로 분석하고 이를 바탕으로 제분 방법에 비교적 민감하지 않고 일정한 품질의 가루를 생산할 수 있는 국내산 쌀 품종을 찾고자 하였다. 건식제분은 예상한 바와 같이 낟알의 경도가 높은 품종이 전분 손상도가 높았으나 습식제분에서는 Chenmaai와 같이 불린 쌀의 경도가 높더라도 전분의 손상도는 상대적으로 낮았다. 건식제분에 따른 손상 전분 함량의 증가는 쌀가루의 수분 흡수력을 급격히 증가시켰으며 습식제분은 낟알의 경도보다는 아밀로오스 함량에 따라서 수분 흡수력에 차이를 나타내었다. 가루의 수분 흡수력과 반비례하여 반죽의 질척한 정도가 나타나지만 고 아밀로오스 함량의 Suweon 517과 Milyang261은 제분 방법에 관계없이 수분 흡수력이 매우 높아서 빵이나 국수 등의 제품을 생산할 때 반죽에 더 많은 양의 물을 첨가해야 할 것으로 생각된다. 또한 건식제분된 가루가 습식제분된 가루에 비하여 수분 흡수력이 크기 때문에 반죽 과정에서 수분 첨가량을 증가시켜야 할 것이다. 건식제분은 품종 모두에서 최고 점도에 이르는 시간이 짧아지고 점도 붕괴가 증가하므로 습식 가루에 비하여 조리시간을 단축하고 호화 후 점도 조절이 필요하다. Hanareumbyeo, Manmibyeo, J insumi, Goamibyeo 등은 건식제분과 습식제분에 따른 호화 특성의 변화가 다른 품종에 비하여 크며, Suweon517과 Milyang261은 건식제분하면 setback 값이 증가하는 것으로 미루어 건식제분된 가루를 이용한 제품의 노화가 더 클 것으로 예측된다. 이상의 결과에 따라서 Chenmaai는 건식과 습식제분 모두에서 손상 전분의 함량이 낮고, 건식제분에 따른 수분 흡수율 증가가 적으며 제분에 따른 호화 점도 특성의 변화가 상대적으로 적어서 제분에 유리한 품종이다. 반면 Seolgaeng와 Suweon517은 낟알의 경도가 부드러운 분상질일지라도 건식과 습식제분 모두에서 손상전분 함량이 높고 수분 흡수력과 호화 점도의 특성 변화가 심하여 쌀가루로 분쇄하는 제분 적성이 좋지 않았다.

Keywords

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