Comparison of Initial Adsorption Rate of Brown and Milled Rices During Storage at $25^{\circ}C$

현미와 백미의 저장 중 초기흡습 속도의 비교

  • Song, Bo-Hyeon (Department of Food Science and Technology, Suncheon National University) ;
  • Kim, Dong-Youn (Department of Food Science and Technology, Chonnam National University) ;
  • Kim, Sung-Kon (Department of Food Science and Nutrition, Dankook University) ;
  • Kang, Seong-Koo (Department of Food Science and Technology, Suncheon National University)
  • Published : 1989.06.30

Abstract

Initial adsorption rates of brown and milled rices at relative humidity of $57{\sim}86%$ were examined at $25^{\circ}C$. The adsorption equations at RH 75% for brown and milled rices were expressed as: log($d{\omega}/dt{\times}10^{3}$)=-0.8108 log t+3.0347 and log($d{\omega}/dt{\times}10^{3}$)=0.8451 log t+3.0087, respectively, where ${\omega}$ is the moisture content(%, db) and t is storage time (hr). The moisture content at RH $57{\sim}86%$ could be calculated from above equations using a conversion factor for each RH.

현미와 백미를 상대습도 $57{\sim}86%$, 저장온도 $25^{\circ}C$에서 각각 13일과 7일간 저장하면서 초기 흡습속도를 분석하였다. 상대습도 75%에서의 흡습속도식은 현미의 경우 log($d{\omega}/dt{\times}10^{3}$)=-0.8108 log t+3.0347, 백미의 경우 log($d{\omega}/dt{\times}10^{3}$)=-0.8451 log t+3.0087로 표시되었다. 여기에서 ${\omega}$는 수분함량(%, 건량기준), t는 저장시간(시간)이다. 상대습도 $57{\sim}86%$에서의 저장 중 수분함량은 각 상대습도에서의 보정계수를 사용하여 예측할 수 있었다.

Keywords