Changes in Apple Liquid Phase Concentration throughout Equilibrium in Osmotic Dehydration

Previous results on apple tissue equilibration during osmotic dehydration showed that, at very long processing times, the solute concentrations of the fruit liquid phase and the osmotic solution were the same. In the present study, changes in apple liquid phase composition throughout equilibrium in...

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Veröffentlicht in:Journal of food science 2007-03, Vol.72 (2), p.E85-E93
Hauptverfasser: Barat, J.M, Barrera, C, Frías, J.M, Fito, P
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Barrera, C
Frías, J.M
Fito, P
description Previous results on apple tissue equilibration during osmotic dehydration showed that, at very long processing times, the solute concentrations of the fruit liquid phase and the osmotic solution were the same. In the present study, changes in apple liquid phase composition throughout equilibrium in osmotic dehydration were analyzed and modeled. Results showed that, by the time osmosed samples reached the maximum weight and volume loss, solute concentration of the fruit liquid phase was higher than that of the osmotic solution. The reported overconcentration could be explained in terms of the apple structure shrinkage that occurred during the osmotic dehydration with highly concentrated osmotic solutions due to the elastic response of the food structure to the loss of water and intake of solutes. The fruit liquid phase overconcentration rate was observed to depend on the concentration of the osmotic solution, the processing temperature, the sample size, and shape of the cellular tissue.
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source MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects Apples
Biological and medical sciences
cell walls
Changes
chemical concentration
dried fruit
drying
equilibrium
Fluids
Food Handling - methods
Food industries
Food Preservation - methods
Food science
Fruit and vegetable industries
fruit quality
Fundamental and applied biological sciences. Psychology
liquid phase concentration
Malus - chemistry
Malus - metabolism
mathematical models
Osmolar Concentration
Osmosis
Osmosis - physiology
osmotic dehydration
osmotic pressure
overconcentration
Solutions
Time Factors
viscoelasticity
title Changes in Apple Liquid Phase Concentration throughout Equilibrium in Osmotic Dehydration
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