Abstract
Sulgiduk is a typical Korean rice cake made by steaming rice powder with syrup and salt added. This study has measured moisture content, water activity, color, texture, and sensory evaluation of sulgiduk when persimmon leaves Powder was added. The material use\ulcorner was sulgiduk to which the 0% (C), l% (S$_1$), 2% (S$_2$), 3% (S$_3$), and 4% (S$_4$) of persimmon leaves powder were added. The moisture content of the raw rice powder for making sulgiduk was 32.40%, and that of the rice powder with syrup added was 37.97%-37.46%. The moisture content of the produced sulgiduk was 38.98%-37.93%, and the water activity was 0.97. In chromatic characteristics. the product had L value: of 73.86-59.16, a value of -2.86~-1.79 and b value: of 19.25-23.13. The texture charicteristics such as hardness, fracturability, gumminess, cohesiveness, chewiness and elasticity were not affected significantly by the persimmon leaves powder. In sensory evaluation. color, flavor, astringency, bitterness and overall quality were adversely affected with statistical significance(p＜001) by the addition of persimmon leaves. The juiciness and softness were also decreased as the persimmon leaves powder increased. In conclusion, it is recommended to add 1-2% of persimmon leaves powder to sulgiduk.
