Change in quality of brown rice packaged in polymeric films (1) Prodiction of change of germination rate
2000
Ishitani, Takasuke | Hasegawa, Yoshinori | Toyoshima, Hidechika | Shimizu, Toshiaki | Patcharee Tungtrakul | Ishikawa, Yutaka(Ministry of Agriculture, Forestry and fisheries, Ibaraki (Japan). National Food Research Instite)
Germination rate is one of the quality-control indexes for brown rice. The effect of moisture content, temperature and storage time on the germination rate of brown rice were investigated and changes of germination rate during storage were predicted. The relationship between the germination rate and time was expressed exponentially and the time coefficient kept constant, independent of temperature and moisture content. The relationship between the germination rate and temperature was likewish expressed exponentially and the temperature coefficient kept constant, independent of moisture content. In the relationship between germination rate and moisture content, the germination rate decreased markedly when the moisture content exceeded 15.5 percent and the exponential function was adapted. The germination rate was then expressed as a function of moisture content, storage temperature and storage time. The mathematical model thus developed predicted the change in the rice germination rate in storage at ordinary temperatures.
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