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      Aplicación del modelo de weibull normalizado en la deshidratación osmótica de láminas de sardina Translated title: Application of Normalized Weibull Model in the Osmotic Dehydration of Sardine Sheets

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          Abstract

          Conocer la cinética de deshidratación osmótica de un alimento y los factores que la afectan son aspectos importantes para diseñar un adecuado proceso. En este trabajo se investigó la aplicación del modelo de Weibull normalizado para describir la deshidratación osmótica de láminas finitas de sardina y determinar el coeficiente de difusión efectivo del agua. La deshidratación osmótica se realizó durante 4 horas utilizando salmueras de diferentes concentraciones (0,15-0,27 g NaCl/g) y temperaturas (30-38°C). Durante el proceso se midió el contenido de agua en las láminas y estos valores se ajustaron al modelo de Weibull normalizado. Los altos valores del coeficiente de regresión (R² > 0,99), la alta significancia (α < 0,001) para el coeficiente de difusión (D) y el parámetro β, y los bajos valores del ji-cuadrado reducido, indicaron la aceptabilidad del modelo para describir el proceso y determinar el coeficiente de difusión efectivo De del agua. Los valores de D variaron entre 1,01 x 10-11 m²/s y 4, 30 x 10-11 m²/s.

          Translated abstract

          Knowledge of kinetics of osmotic dehydration of a food and factors that cause effects are aspects import for the appropriate design of process. In this work the application of normalized Weibull model was investigated for describing the osmotic dehydration (OD) of sardine finite sheets and determining the effective diffusion coefficient for water. The OD was carried out during 4 hours using brine at different concentrations (0.15-0.27 g NaCl/g) and temperatures (30-38°C). During process the water content of shhets was measured and these values were fitted to normalized Weibull model. The high values of regression coefficients (R² > 0.99), high significance (α < 0.001) of diffusion coefficient (D), parameter β, and low values of chi-square indicated the acceptability of Weibull model for describing the process and determining the effective diffusion coefficient De for water. The values of D ranged from 1.01 x 10-11 m²/s to 4.30 x 10-11 m²/s.

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          Official methods of analysis

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            Osmotic dehydration in fruit and vegetable processing

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              Determination of suitable thin layer drying curve model for some vegetables and fruits

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rc
                Revista Científica
                Rev. cient. (Maracaibo)
                UNIVERSIDAD DEL ZULIA (Maracaibo )
                0798-2259
                August 2009
                : 19
                : 4
                : 400-407
                Affiliations
                [1 ] Universidad de Oriente Venezuela
                Article
                S0798-22592009000400012
                3de76028-b7a2-42a3-b837-da78fddcfd1b

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Venezuela

                Self URI (journal page): http://www.scielo.org.ve/scielo.php?script=sci_serial&pid=0798-2259&lng=en
                Categories
                ENGINEERING, MULTIDISCIPLINARY
                VETERINARY SCIENCES

                General veterinary medicine,General engineering
                Osmotic dehydration,Weibull model,diffusion coefficient,simulation,Fick’s law,sardine,Deshidratación osmótica,modelo de Weibull,coeficiente de difusión,simulación,ley de Fick,sardina

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