Blackwell Publishing Journal Backfiles 1879-2005
Process Engineering, Biotechnology, Nutrition Technology
A three-dimensional transmission line matrix (TLM) model, using axisymmetric elements, was developed for describing moisture diffusion during the soaking of long-grain brown rice. On the basis of this model, moisture diffusivities for bran and endosperm were calculated as a function of temperature. Endosperm diffusivities of 0.92, 1.08 and 1.26X10-10 m2 s-1 and bran diffusivities of 0.11, 0.18 and 0.37x10-10 m2 s-1 were found, both at 30, 40 and 50°C respectively. The activation energies for moisture diffusion were calculated to be 13.08 and 49.85 kJ mol-1 for endosperm and bran respectively.
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