Volumetric and Acoustic Properties of Aqueous Carbohydrate–Polymer Solutions

Abstract

From the measured experimental data, the isentropic compressibility values of the investigated solutions were determined and from which the values of the hydration numbers of the carbohydrates were calculated. Apparent molar volume and apparent molar isentropic compressibility of the carbohydrates in the investigated solutions were also determined and based of them the sweet properties of the carbohydrates were discussed. Finally, the infinite dilutions apparent molar properties for transfer of the carbohydrates from water to aqueous solutions of different polymers were studied and the results were discussed based on the different interactions exist in the solutions.

Investigation of the Thermodynamic Properties in Aqueous Solutions Containing d-Fructose and Some Imidazolium-Based Ionic Liquids at Different Temperatures

“…The obtained density data for {fructose + water} and {fructose + ionic liquid + water} solutions are reported in Tables S1–S3 in the Supporting Information. The density data for binary { d -fructose + water} solutions together with literature data are illustrated in Figures S4–S7. − By fitting the experimental density data measured in this work to a polynomial function ( y = a + bx + cx 2 ), the root-mean-square deviation (RMSD) % values of 0.005, 0.013, 0.006, and 0.025 are obtained at T = 288.15, 298.15, 308.15, and 318.15 K, respectively. Plots of deviations of measured and literature values from the d ( m fructose ) fits of measured data to the corresponding polynomial function at each temperature are shown in Figures S8–S11.…”

Measurements and Correlation of Water Activity in Aqueous Solutions Containing Diphenhydramine-Hydrochloride Drug, (D+)-Galactose, (D−)-Fructose, (D+)-Lactose, and Sucrose at 298.15 K

“…Volumetric properties of some medicines have been measured in water and 0.02 mol kg –1 MgCl 2 ·6H 2 O at 298.15 and 308.15 K by Jamal et al The effect of sodium chloride and myo-inositol on volumetric and acoustical properties of aqueous solutions of DPH-HCl drug has been investigated by Jengathe et al The density, speed of sound, and viscosity values have been measured for aqueous solutions of DPH-HCl + (D−)-fructose, DPH-HCl + (D+)-galactose, and DPH-HCl + (D+)-lactose in our previous work . Special attention was also paid to study the volumetric properties and viscosity of the binary and ternary aqueous solutions of galactose, fructose, lactose, and sucrose. − Miracco et al measured the water activity in a binary aqueous solution of lactose. Isopiestic determinations for ternary aqueous solutions containing 1-hexyl-4-methylpyridinium bromide, 1-hexyl-3-methyl imidazolium chloride, fructose, and sucrose have been carried out in our previous work. , …”