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Modelling the transport of lactic acid, sodium chloride and reducing sugars in ...
Nabais, Regina M.; Vieira, Madalena C.; Malcata, F. XavierThe transport phenomena pertaining to the independent diffusion of lactic acid and sodium chloride from a brine into carrot slices submerged therein, and of reducing sugars in the opposite direction, were experimentally studied at various temperatures and initial concentrations of salt and acid in the brine. The data sets obtained at each combination of temperature and initial concentration of the brine were in...
Modelling the transport of lactic acid, sodium chloride and reducing sugars in ...
Nabais, Regina M.; Malcata, F. XavierIn this paper following a methodology of (nested) increasing model complexity, it was found that the apparent diffusivities and the partition coefficients associated with the transport of lactic acid and sodium chloride from the brine into carrot slices submerged therein can be modelled as functions of temperature using Arrhenius-type relationships and as exponential functions of the initial concentrations of e...
Firmness of carrot slices submerged in brines: experimental data and mathematic...
Nabais, Regina M.; Malcata, F. XavierThe firmness of carrot slices was measured at various temperatures for several concentrations of brines in sodium chloride and lactic acid. A model assuming that textural decay is due to irreversible, pseudo first-order enzyme-catalyzed degradation of the carrot cell wall polysaccharides in the presence of two alternative paths for first order enzyme deactivation was fitted to the aforementioned data sets. The ...
Optimizing a lactic fermentation of sliced carrots
Nabais, Regina M.; Malcata, F. XavierResponse surface methods were utilized in the statistical optimization of several quality factors pertaining to the preservation of carrot slices using a brine containing lactic acid produced by in situ fermentation. These factors were the concentrations of salt, acid, and reducing sugars, and the texture of the carrot material, and the pH, concentrations of acid, reducing sugars, and biomass (at two different ...
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