The Characteristics of Quality and Storage of Tofu(Soybean Curd) according to the Concentration of Cuttlefish Ink

오징어 먹물 첨가량에 따른 두부의 품질 특성 및 저장성

To make tofu (soybean curd) with cuttlefish int the cuttlefish ink diluted 20-fold was added to soymilk in the ratio of 0%, 1%, 3%, 5%, 7% and 9% there is no respective comparison here respectively and the prepared cuttlefish inky tofu samples were stored for 15 days at $4^{\circ}C$. After storage, the tofu samples were tested for yield, pH, acidity, bacterial growth, sensory evaluations and physical properties. The yields of 7%(I7) and especially 9%(I9) cuttlefish ink tofu were higher than that of the control tofu(I0). The pH was decreased, but the acidity was increased with increasing storage period. The microorganism count of I9 was the lowest during the storage period. The turbidity gradually increased until 9 days of storage and rapidly increased at 12 days of storage. In the measurement of inky tofu color, the L and b values were decreased during the storage period. In the texture analysis, the hardness, gumminess and brittleness of inky tofu were increased until 12 days of storage but then decreased. Chewiness was decreased with increasing storage period. Springiness of Il and I3 was higher than that of I0. In sensory evaluation, color was increased with increasing cuttlefish inky concentration. Sleekness of I3 was the highest. Hardness and chewiness of inky Il and I3 were the highest. Springiness, cohesiveness and softness were the highest in I3. In overall acceptability, I3 gained the highest score.