Abstract
This study was carried out to investigate rheological properties of bread dough by adding hydrocolloids such as arabic gum, pectin and carboxyl methyl cellulose (CMC). 0.2% and 0.5% of each hydrocolloid were added to the dough. Farinograph, pH of dough, extensograph, fermometer and amylograph were analyzed. In farinograph, water absorption rate of dough was increased by adding hydrocolloids and the highest water absorption resulting in 70.8% was shown by adding 0.5% of CMC. Dough development time increased but stability decreased. pH of dough was lowered by adding hydrocolloids and pH of dough with 0.5% of pectin was the lowest. In extensograph, resistance of dough decreased but extensibility increased and R/E value lowered. In fermometer, $CO_2$ gas production increased and dough with 0.2% of CMC showed the largest gas production. In amylograph, initial gelatinization temperature increased by $0.5-1.5^{\circ}C$, but temperature for maximum viscosity was lowered by $1-1.5^{\circ}C$ and maximum viscosity was increased.
Hydrocolloid 로 arabic gum, carboxyl methyl cellulose, pectin을 각각 강력분에 0.2%와 0.5% 첨가하여 반죽의 레올로지 특성 변화를 farinograph, 반죽의 pH, extensograph, fermometer, amylograph 등으로 분석하였다. Hydrocolloid 첨가 시 farinograph에서 흡수율은 증가되었고 CMC 0.5% 첨가시 70.8%로 흡수율이 가장 높았다. 반죽발전시간은 길어졌으나 안정도는 낮아졌다. Hydrocolloid 첨가로 반죽의 pH는 저하되었고 pectin 0.5% 첨가시 가장 낮았다. Extensograph에서 반죽의 저항성은 감소하였고 신장성은 증가하였으며 R/E 값은 낮아졌다. 반죽의 가스발생량은 증가하여 CMC를 0.2% 첨가시 가장 많은 가스를 발생하였다. Amylograph에서 초기호화온도는 $0.5-1.5^{\circ}C$ 싱승하였으나 최고점도온도는 $1-1.5^{\circ}C$ 낮아졌고 최고점도는 높아졌다.
