Abstract

고구마 분말을 첨가한 뻥튀기 제조 시 팽화시간, 팽화온도, 수분함량과 같은 팽화조건을 달리하여 물리적 및 관능적 품질 특성을 조사하였다. 실험 결과, 색도에서 수분함량은 유의적 차이를 나타내지 않았지만 팽화온도와 팽화시간이 증가함에 따라 <TEX>$L^*$</TEX>값이 감소하고, <TEX>$a^*$</TEX>값과 <TEX>$b^*$</TEX>값이 증가하였다. 비체적은 팽화시간, 팽화온도, 수분함량이 증가할수록 일반 고구마 뻥튀기의 비체적도 증가하였으며, 파괴력은 낮은 수분함량, 높은 팽화온도, 오랜 팽화시간에서 높게 나타났다. 또한 외관, 색, 향, 조직감, 맛에 대한 패널들의 전체적인 기호도를 나타낸 관능평가에서는 수분함량 및 팽화온도가 높고, 오랜 팽화시간 하에 제조된 시험구가 우수하게 평가되었다. The physical properties of puffed snack by pellet with sweet potato flour, brown rice flour and wheat flour were evaluated at different moisture content, puffing temperature, and puffing time. The sweet potato pellets were tempered to 14, 16, and 18% moisture content and were puffed at 233, 238, and <TEX>$243^{\circ}C$</TEX> for 4, 5 and 6 s. The whitness (<TEX>$L^*$</TEX>) value decreased as the heating temperature and time increased. The redness (<TEX>$a^*$</TEX>) and yellowness (<TEX>$b^*$</TEX>) values increased with increasing heating temperature and time. The specific volume of sweet potato puffed snacks showed an increasing trend with higher puffing conditions. The hardness of sweet potato puffed snacks increased as heating time and heating temperature increased. The sweet potato puffed snacks prepared with increasing moisture content (18%), heating times (6 s), and heating temperatures (<TEX>$243^{\circ}C$</TEX>) were awarded the highest scores for most of the sensory attributes and hence declared as best sweet potato puffed snacks.

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