Impact of heat-moisture treatment applied to brown rice flour on the quality and digestibility characteristics of Korean rice cake
Kim, M.J., Chonnam National University, Gwangju, Republic of Korea | Oh, S.G., National Institute of Crop Science, Suwon, Republic of Korea | Chung, H.J., Chonnam National University, Gwangju, Republic of Korea
Effect of heat-moisture treatment (HMT) of brown rice flour on the quality and digestibility of Korean rice cake (jeolpyeon) was investigated. Brown rice flour with 20% moisture content was heat-moisture treated at 100 - 110 degree Celsius for 1 - 2 h, and subsequently cooled to 4 degree Celsius for 1 - 2 h. The lightness of HMT rice cake decreased as HMT temperature and time increased, whereas redness and yellowness increased. The hardness, springiness, and cohesiveness of HMT rice cake were much lower than those of brown rice cake. HMT of rice cake caused an increase in the resistant starch content and a decrease in the rapidly digestible starch content. In sensory evaluation, hardness of HMT rice cake was substantially lower than that of rice cake made with untreated brown rice due to retardation of retrogradation. However, the overall acceptability of HMT rice cake was lower than that of white rice cake or brown rice cake.
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