Osmotic and Activity Coefficients of Some Nonelectrolytes.

Abstract

Osmotic and activity coefficients are reported for solutions of dextrose, sym-dimethylurea, and meso-erythrytol at 25°and 37°C. Osmotic coefficients are also reported at 60°C. for concentrated solutions of these compounds. The solvation of certain alcohols and sugars is indicated to be directly related to the number of polar groups per molecule.

Isopiestic studies on (mannitol + sorbitol+D-glucose)(aq) and two of the subsystems at the temperature 298.15 K

“…Here the values for D-glucose(aq) are in fair agreement with those of Miyajima et al (11) and Taylor and Rowlinson, (12) but are slightly smaller than those of Bonner and Breazeale. (13) The values for sorbitol(aq) and mannitol(aq) are in good agreement with those of Bonner (14) and Stokes and Robinson. (4,15) The next two columns give the osmotic coefficients of the solutions calculated by equation (4) and the values of D defined by equation (3).…”

Hygroscopic Study of Glucose, Citric Acid, and Sorbitol Using an Electrodynamic Balance: Comparison with UNIFAC Predictions

“…Bonner and Breazeale (1965) reported the osmotic coef cients of glucose solutions of 0.2 mol kg 1 to a supersaturated concentration of 10 mol kg 1 based on the conventional isopiestic vapor pressure measurements at 25 ± C. Ruegg and Blanc (1981) measured the water activities of glucose solutions of concentrations from 1.2 mol kg 1 to a supersaturated concentration of 7.2 mol kg 1 at 25 ± C. Water activities of bulk glucose solutions at concentrations of 1 mol kg 1 6:2 mol kg 1 were measured in this study.…”

Model for on-line moisture-content control during solid-state fermentation

“…Assuming an extracellular water content equal to 1 kg/kg substrate and a biomass dry-weight content of 0.3 kg/kg total DM (average SDR experiments B and C in Table II), the glucose concentration can be estimated to be 170 to 200 g/L. According to the data of Bonner and Breazeale (1965), the water activity of a solution with 200 g/L glucose is 0.98. This water activity corresponds to 97% of the maximum colony growth rate for Aspergillus oryzae, according to data of Gibson et al (1994).…”