desidratação osmótica de fatias de jaca osmotic dehydration of jack fruit slices

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ID: 238783
2012
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Abstract
O presente trabalho foi realizado com o objetivo de estudar a cinética e modelagem do processo de desidratação osmótica de fatias de jaca em geometria plana. O tratamento osmótico foi conduzido a 43 ºC, com agitação, utilizando-se de soluções de sacarose, nas concentrações de 40 e 50 ºBrix. O estudo da cinética de desidratação osmótica mostrou que na solução de sacarose a 50 ºBrix o valor da perda de água (WL) foi maior ao final de 28,5 horas de processo (68,5% b.u para 40,2% b.u.), ligeiramente superior ao encontrado para a solução de sacarose a 40 ºBrix, (68,5% b.u para 43% b.u.). Comportamento contrário ocorreu para o ganho de sólidos (SG). O ajuste dos dados experimentais foi realizado através dos modelos de Page e Fick. Pela análise da equação de Fick, verificou-se que os coeficientes de difusividade efetiva foram 0,5837 e 0,6677 mm² min-1 para 40 e 50 ºBrix, respectivamente.
The present work was undertaken with the objective of studying the kinetics and the osmotic-dehydration modeling of slices of jack-fruit in a flat layout. The osmotic treatment was carried out at 43ºC, employing agitation, and using sucrose solutions at concentrations of 40º and 50º Brix. The study of the kinetics of osmotic dehydration showed that in the sucrose solution at 50º Brix, the value of the water-loss (WL) was higher after 28.5 hours of processing (68.5% wb to 40.2% wb) , slightly higher than that found for the sucrose solution at 40º Brix (68.5% wb to 43% wb). The opposite behavior was observed for the gain in solids (SG). Adjustment of the experimental data was done using the Page and Fick models. From the analysis of the Fick equation, it was found that the effective diffusivity coefficients were 0.5837 and 0.6677 mm² min-1 for 40º and 50º Brix, respectively.
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Authors ;Maria Elita Martins Duarte;Sânia Mara Pereira Ugulino;Mario Eduardo Rangel Moreira Cavalcanti Mata;Deyzi Santos Gouveia;Alexandre José de Melo Queiroz
Journal international journal of computer games technology
Year 2012
DOI
10.1590/S1806-66902012000300009
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000300009
Keywords
fruits dehydration

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