Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/61950
標題: Effects of far-infrared radiation on the freeze-drying of sweet potato
作者: Lin, Y.P.
金安兒
Tsen, J.H.
King, V.A.E.
關鍵字: far-infrared radiation
freeze-drying
sweet potato
model
slices
models
barley
期刊/報告no:: Journal of Food Engineering, Volume 68, Issue 2, Page(s) 249-255.
摘要: An experimental dryer was developed to determine the drying characteristics of sweet potato during freeze-drying with far-infrared radiation. The experimental drying time of sweet potato cubes dehydrated by three drying methods, i.e., air-drying, freeze-drying, and freeze-drying with far-infrared radiation, were compared, and freeze-drying with far-infrared radiation was found to be able to reduce the drying time of sweet potato. Both constant and falling rate drying periods were observed, and empirical equations were developed to study the behavior of drying rate in falling rate period. On the other hand, four mathematical models were used to describe the drying characteristics of sweet potato during freeze-drying with far-infrared radiation. The coefficients of determination (R-2) in the exponential, Page, and approximate diffusion model were found to be above 0.98, and that of diffusion model was above 0.92. The rank of fitness of those models was Page, approximate diffusion, exponential and diffusion model. The choice of Page model was evident because of the lowest residual as well as RMSE. The Page model described the far-infrared freeze-drying characteristics of sweet potato properly. (C) 2004 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/61950
ISSN: 0260-8774
文章連結: http://dx.doi.org/10.1016/j.jfoodeng.2004.05.037
Appears in Collections:食品暨應用生物科技學系

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