단립종 쌀가루, 장립종 쌀가루, 단립종 팽화미분 및 장립종 팽화미분의 호화도와 α-amylase 첨가에 따른 쌀가루와 팽화미분 아이스크림의 점도, 오버런, 녹아내리는 정도, 수분, 조지방, 총당 그리고 색도를 조사하였다. 호화도는 동일 곡종에서는 팽화로 호화도가 증가하였으며, 동일 처리구에서는 단립종이 장립종 보다 높았다. 점도는 α-amylase 농도가 증가할수록 감소했고 0.0%를 제외한 동일 농도와 곡종에서는 쌀가루가 팽화미분보다 높았으며, 같은 농도와 처리구에서는 단립종이 높았다. 오버런은 0.2%가 가장 높았고 같은 농도와 처리구에서는 단립종이 높았다. 녹아내리는 정도는 믹스 점도가 낮아질수록 많이 녹아내렸고, 팽화미분이 쌀가루보다 많았다. 수분은 효소함량에 따라 유의적 차이가 없었으며, 팽화유무에 상관없이 단립종이 높거나 같았다. 조지방은 농도, 곡종 및 팽화유무와 상관없이 유의적 차이가 없었다. 총당 함량은 α-amylase 농도가 증가할수록 높아졌고 동일 농도에서는 팽화미분이 높은 값을 보였다. 색도는 α-amylase 농도가 짙어질수록 “L”값과 “b”값은 증가하였고 “a”값은 감소하였다. 동일한 농도와 곡종에서는 팽화에 의해 “b”값은 감소하였다(p<0.05).
The gelatinization degree of short grain rice powder, long grain rice powder, short grain puffed rice powder and long grain puffed rice powder, as well as the viscosity, overrun, melting-down, moisture, crude fat, total sugar, and color of rice powder and puffed rice powder ice cream, following the addition of α-amylase were investigated. For identical grain types, the gelatinization degree increased with puffing, and within the same treatment, the short grain had a higher than the long grain. Viscosity dropped with increasing α-amylase; at the same concentration and grain type, excluding 0.0%, the rice powder was higher than the puffed one, and for the same concentration and treatment, the short grain was higher. The overrun was highest at 0.2%, and for the same concentration and treatment, the short grain exhibited higher overrun. Higher melting-down was observed in puffed samples and lower viscosity ice cream mix. No significant difference was found in moisture content with enzyme concentration. Regardless of puffing, the short grain tended to have a higher moisture content. No difference was noticed in crude fat by concentration, grain type or puffing. The total sugar content was higher with increasing α-amylase; at the same concentration, puffed one tended to be higher. The hunter “L” and “b” increased with α-amylase concentration, while the “a” value dropped. At the same concentration and for the grain type, the “b” values decreased with puffing(p<0.05).