Publication
Experimental determination and computer fitting of desorption isotherms of D. Joaquina pears.
| dc.contributor.author | Guiné, Raquel | |
| dc.contributor.author | Castro, José | |
| dc.date.accessioned | 2013-01-07T10:43:53Z | |
| dc.date.available | 2013-01-07T10:43:53Z | |
| dc.date.issued | 2002 | |
| dc.description.abstract | Desorption isotherms at different operating temperatures provide valuable information for the design and control of drying processes. In the present work the desorption isotherms of pears are determined according to two equivalent forms of the G.A.B. model at temperatures of 20, 25 and 30 ºC. These cover the range of summer average daily temperatures in Portugal, when the solar drying of pears is carried out. Two different computer fitting methodologies are used, namely, Ordinary Least Squares (OLS) and Orthogonal Distance Regression (ODR), in order to evaluate the above mentioned forms of the G.A.B. model. From the results obtained it is possible to conclude that the ODR fitting is clearly more adequate than the OLS technique for this kind of experimental problem. Moreover, it is advisable to exploit the full form of the G.A.B. model instead of its simplified and restricted version. Finally, the desorption isotherms do not vary significantly in the temperature range under study. | por |
| dc.identifier.citation | Guiné RPF, Castro JAAM. (2002) Experimental determination and computer fitting of desorption isotherms of D. Joaquina pears. Food and Bioproducts Processing, 80(C3), 149-154. | por |
| dc.identifier.uri | http://hdl.handle.net/10400.19/1372 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.relation.ispartofseries | 80;C3 | |
| dc.subject | sorption isotherms | por |
| dc.subject | GAB model | por |
| dc.subject | least squares | por |
| dc.subject | orthogonal disntance regression | por |
| dc.title | Experimental determination and computer fitting of desorption isotherms of D. Joaquina pears. | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 154 | por |
| oaire.citation.startPage | 149 | por |
| oaire.citation.title | Food and Bioproducts Processing | por |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |