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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Carbohydrate Research 232 (1992), S. 151-159 
    ISSN: 0008-6215
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Lebensmittel-Untersuchung und -Forschung 204 (1997), S. 210-214 
    ISSN: 1431-4630
    Keywords: Key words Dehydration ; Osmosis ; Mathematical model ; Mass transfer ; [C Average sucrose concentration (g sucrose/g d.m.) ; C* average dimensionless sucrose concentration ; Cdis osmotic solution concentration (g sucrose/g d.m.) ; Ce equilibrium sucrose concentration (g sucrose/g d.m.) ; Co initial sucrose concentration (g sucrose/g d.m.) ; Cl local sucrose concentration (g sucrose/g d.m.) ; DSeff diffusivity coefficient of sucrose (m2/h) ; DSo preexponential factor in Eq. 9 ; DWeff diffusivity coefficient of water (m2/h) ; DWo preexponential factor in Eq. 8 ; ESa energy of activation in Eq. 9 (J/mol) ; EWa energy of activation in Eq. 8 (J/mol) ; L half-thickness of the solid (m) ; Po initial sample weight (g) ; Psso initial dry matter (g) ; Pssf final dry matter (g) ; Sy standard deviation (sample) (g water/g d.m.)2 ; Syx standard deviation (estimation) (g water/ g d.m.)2 ; %var percentage of explained variance ; W average moisture content (g water/g d.m.) ; We equilibrium moisture content (g water/g d.m.) ; W1 local moisture content (g water/g d.m.) ; Wo initial moisture content (g water/g d.m.) ; WPsso moisture content referred to the initial dry matter (g water/ g d.m.) ; x x-axis distance (m) ; y y-axis distance (m) ; z z-axis distance (m) ; ΔW water losses (g) ; ΔP mass losses (g) ; ΔPss mass gain (g) ; ΔPss/Psso solute gain referred to the initial dry matter (g solute/g d.m.) ; Ψ dimensionless moisture content]
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The curves of dehydration by osmosis of 1 cm3 apple cubes have been simulated assuming the existence of two diffusional species. The diffusivity value of the two species, water and sucrose, was obtained by using a numerical method of non-linear regression analysis. The influence of the solution conditions (temperature and sucrose concentration) on the absorption rate was evaluated. Two sets of experiments were carried out: experiments at 70°Brix and different solution temperatures (30, 40, 50, 60 and 70 °C) on the one hand, and experiments at 50 °C and different solution concentrations (30, 50 and 70°Brix) on the other. The proposed diffusive model is able to explain 98% of the total variance. This model is also applicable to the simulation of dehydration by osmosis for other food products.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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