팽화흑진주미를 이용한 흑미빵의 품질특성

Characteristics of colored rice bread using the extruded HeugJinJu rice

흑진주미를 이용한 쌀식빵을 제조하기 위하여 흑진주미를 압출성형공법으로 팽화 처리한 후 이에 대한 물성 및 호화도를 측정하고, 팽화흑진주미의 첨가율에 따른 제빵적성과 관능검사를 검토하였다. 압출 성형물의 팽화율은 원료의 수분함량이 많을수록 낮아졌고, 전단강도와 용적율은 증가하였다. 원료의 수분을 20%로 조절하여 팽화하였을때 호화도는 92%였다. 팽화흑진주미를 첨가한 식빵의 부피는 첨가비율이 증가함에 따라 감소하는 경향을 보였으며, 무게에는 유의한 차이가 없었다. 색차는 팽화흑진주미를 첨가할수록 점차 식빵의 색이 어두워지고 적색을 많이 띄고 황색은 적어지는 경향을 나타내었으며, 팽화흑진주미의 첨가비율이 경도에는 유의한 영향을 주지 않았다. 관능검사 결과 팽화흑진주미를 첨가한 군이 향과 색, 맛에서 모두 대조군보다 높은 선호도를 나타냈으며, 향과 색, 맛, 조직감의 전체적인 선호도가 팽화흑진주미를 10% 첨가한 군에서 높게 나타났다.

The characteristics of colored rice bread using the extruded HeugJinJu rice were studied to establish the optimum formula for the formation of colored rice bread, giving good loaf volume and sensory quality. The expansion ratio and bulk density were decreased, the break strength was increased as the moisture content was increased at extrusion. The gelatinization of extruded HeugJinJu rice was appropriate at 20% of moisture content. The volume of colored rice bread was decreased as the quantity of adding extruded HeugJinJu rice was increased. The weight and hardness of colored rice bread were not significantly different among the groups. The result of measurement of color difference, L value (lightness) was decreased, a value (redness) was increased and b value (yellowness) was decreased as the quantity of adding extruded HeugJinJu rice was increased. As the results of sensory evaluation, color, taste, texture and overall acceptance of colored rice bread were higher than the control group. The best quality giving color, taste, texture, total preference were observed when the extruded HeugJinJu rice was added at l0%.