Substitution of Rice Flour on Bread-Making Properties

쌀가루 첨가 식빵의 제빵 특성

  • Received : 2010.05.12
  • Accepted : 2010.09.24
  • Published : 2010.10.30

Abstract

Effects of substituting wheat flour with rice flour on bread-making properties were investigated. Rice(Oryza sativa L.) cultivars were 'Goami2(G2)', a functional rice containing higher non-digestible carbohydrates, and 'Chucheongbyeo (CC)', an ordinary Japonica rice. Rice flour was substituted at 10, 20 and 30% in wheat bread formulation, and the composite flour was used for yeast-leavened bread making. Peak and final viscosity of G2 rice flour was significantly lower than that of CC rice flour. Mixograph analysis indicated that replacement of G2 rice flour increased dough water absorption and mixing time compared to wheat flour. But, typical mixograph pattern was not found in the dough from composite flour with CC rice flour. As increasing the amount of rice flour, the G2 rice breads showed a significant decrease in loaf volume, but an increase in bread crumb firmness(g). For the CC rice breads, no significant difference(p<0.05) was observed in loaf volume and crumb firmness, ranging 1012~1050 cc and 433~482g, respectively. The results revealed that Chucheongbyeo is more suitable for bread-making with the composite flour of rice(10~30%) and wheat flour.

특수미 품종인 고아미2호는 취반용 쌀로는 적합하지 않으므로 가공용 기능성 곡류소재로서의 활용성을 알아보고자 제빵 시 강력분의 일부를 쌀가루로 대체하였으며 일반 쌀 품종인 추청벼 쌀가루와의 제빵특성을 비교하였다. 쌀가루의 호화특성은 고아미2호는 전분 호화 시 호화개시온도가 높고 전분 팽윤 현상이 억제되어 호화 점도가 매우 낮았다. 강력분에 쌀가루를 10~30% 대체한 혼합분의 mixograph특성은 고아미2호 복합분은 쌀가루 함량이 증가 할수록 가수량이 증가하였으나 추청벼 복합분은 쌀가루함량 증가 시 반죽 안정도가 현저하게 감소되었다. 복합분을 활용한 식빵에서 고아미2호 쌀빵은 쌀가루 증가와 함께 부피 감소와 함께 빵 내부의 경도가 현저하게 증가하였다. 그러나 추청벼 쌀빵은 최대 30%까지 대체 시 빵의 부피 및 경도에서 유의한 차이가 관찰되지 않았으므로 강력분의 일부를 대체한 쌀빵 가공을 위해서는 난소화성 다당류 함량이 높은 고아미2호보다는 일반 쌀 품종인 추청벼가 적합하였다.

Keywords

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