dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T14:02:19Z | |
dc.date.available | 2014-05-20T14:02:19Z | |
dc.date.created | 2014-05-20T14:02:19Z | |
dc.date.issued | 2007-10-01 | |
dc.identifier | Journal of Food Engineering. Oxford: Elsevier B.V., v. 82, n. 3, p. 284-291, 2007. | |
dc.identifier | 0260-8774 | |
dc.identifier | http://hdl.handle.net/11449/21965 | |
dc.identifier | 10.1016/j.jfoodeng.2007.02.004 | |
dc.identifier | WOS:000246936300003 | |
dc.identifier | 2405706828751494 | |
dc.identifier | 2298375076173727 | |
dc.description.abstract | Kinetics of osmotic dehydration (OD) and effects of sucrose impregnation on thermal air-drying of pumpkin slices were investigated. A simplified model based on the solution of Fick's Law was used to estimate effective diffusion coefficients during OD and air-drying. In order to take into account shrinkage, average and variable thicknesses were considered. Pumpkin slices were dehydrated in sucrose solutions (40%, 50% and 60%, w/w, 27 degrees C. The effective water diffusion coefficients were higher than the sucrose, and low diffusivity dependence with solution concentration was observed. Samples non-treated and pre-treated in 60% osmotic solutions during one hour were dried in a hot-air-dryer at 50 and 70 degrees C (2 m/s) until equilibrium was achieved. Pre-treatment enhanced mass transfer during air-drying. Great volume reduction was observed in pre and non-treated dried samples. Using variable thickness in the model diminished the relative deviations between predicted and experimental OD and drying data. (C) 2007 Elsevier Ltd. All rights reserved. | |
dc.language | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation | Journal of Food Engineering | |
dc.relation | 3.197 | |
dc.relation | 1,279 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | Diffusion coefficient | |
dc.subject | osmotic dehydration | |
dc.subject | convective drying | |
dc.subject | shrinkage | |
dc.subject | pumpkin | |
dc.title | Kinetics of osmotic dehydration and air-drying of pumpkins (Cucurbita moschata) | |
dc.type | Artículos de revistas | |