Partial molar volume of apolar gases in aqueous solutions from room temperature to supercritical conditions

1989 ◽  
Vol 93 (9) ◽  
pp. 3802-3805 ◽  
Author(s):  
Roberto Fernandez-Prini ◽  
Maria Laura Japas
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Room Temperature ◽  
Supercritical Conditions

Density estimates of binary aqueous solutions

1983 ◽  
Vol 48 (8) ◽  
pp. 2327-2334
Author(s):  
Otakar Söhnel ◽  
Petr Novotný ◽  
Zdeněk Šolc
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Infinite Dilution ◽  
The Other ◽  
Density Estimates ◽  
Molar Volumes ◽  
Solutions Of Electrolytes ◽  
Experimental Values

Two methods are given for assessment of density of binary aqueous solutions of electrolytes; one is based on partial molar volume of the dissolved electrolyte at infinite dilution, and the other is based on additivity of apparent molar volumes at a given concentration. The density estimates of aqueous solutions by means of the two methods are compared with experimental values for some electrolytes of the type 1-1 to 4 and 2-2. In all cases the estimates agree with experimental densities up to concentrations of the saturated solutions.

Partial molar volume of dodecyltrimethylammonium hydroxide in water and NaOH aqueous solutions

1998 ◽  
Vol 276 (8) ◽  
pp. 738-742 ◽  
Author(s):  
M. A. Morini ◽  
R. M. Minardi ◽  
P. C. Schulz ◽  
J. E. Puig ◽  
J. L. Rodriguez
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume

Dependence of the Second Virial Coefficient of Aqueous Solutions of Small Non-Electrolytes on Partial Molar Volume and Molecular Weight of the Solutes

1993 ◽  
Vol 46 (6) ◽  
pp. 929 ◽  
Author(s):  
K Kiyosawa
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Virial Coefficient ◽  
Van Der Waals ◽  
Second Virial Coefficient ◽  
Aqueous Systems ◽  
Quadratic Equations

The osmotic pressures of aqueous solutions of small non-electrolytes, namely ethane-1,2-diol, propane-1,2,3-triol, sucrose and raffinose , were found to be expressible by quadratic equations of the molar concentration, which indicate that these aqueous systems involve no term higher than the second virial coefficient A2. Analysis has shown that A2 mainly does not arise from non-ideality of the aqueous solutions, but its magnitude depends on the partial molar volume of the solute, more precisely on the molecular weight or van der Waals radius or volume of the solute in the aqueous solution.

scholarly journals Influence of pH and Salts on Partial Molar Volume of Lysozyme and Bovine Serum Albumin in Aqueous Solutions

2018 ◽  
Vol 41 (12) ◽  
pp. 2337-2345
Author(s):  
Fabian Jirasek ◽  
Edder J. Garcia ◽  
Eva Hackemann ◽  
Nadia Galeotti ◽  
Hans Hasse
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Bovine Serum ◽  
Influence Of Ph

scholarly journals Cyclodextrins in Parkinson’s Disease

Biomolecules ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 3 ◽  
Author(s):  
Marisa C. F. Barros ◽  
Ana C. F. Ribeiro ◽  
Miguel A. Esteso
Keyword(s):  
Parkinson’S Disease ◽  
Drug Delivery ◽  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Diffusion Coefficients ◽  
Dopaminergic Neurons ◽  
Drug Delivery Systems ◽  
Controlled Drug Delivery ◽  
Delivery Systems

: Parkinson’s disease is a movement disorder characterized by a progressive degeneration of dopaminergic neurons that has been object of study by the scientific community through the last decades. However, nowadays there is still no treatment to cure it, although there are drugs available, with limited efficacy, to relieve the symptoms or replenish the cells with dopamine to supply the lack of dopaminergic neurons. This work was structured in two parts. In the first one, binary aqueous solutions of L-dopa and cyclodextrins were studied. In the second part, ternary aqueous solutions of L-dopa were studied with each of the selected cyclodextrins. In all cases, thermodynamic properties (density, partial molar volume and thermodynamic transfer functions for temperatures between 294.15 ± 0.01 K and 312.15 ± 0.01 K) and transport properties (mutual diffusion coefficients, viscosity, transfer viscosity at 298.15 ± 0.01 K and 310.15 ± 0.01 K) were studied. Using theoretical models to adjust the experimental data obtained for the diffusion coefficients and for the apparent molar volumes, in the ternary aqueous solutions, it was possible to estimate the values to the L-dopa-cyclodextrin association constant. For the aqueous ternary solutes, the partial molar volume of transfer of levodopa in the presence of the cyclodextrins, the partial molar expansibility at infinite dilution and from this, the Hepler constant, were determined. Also, the values of Gibbs free energy (ΔG0), enthalpy (ΔH0) and entropy (ΔS0) were determined. From the obtained information, it was possible to characterize the molecular interactions, as well as to identify some structural characteristics of the controlled drug delivery systems under study and to estimate the influence of the cyclodextrin substituent groups, and, also, the temperature effect in the interaction levodopa-cyclodextrin. It is our intent to attain information about the mechanism of possible new systems for controlled drug delivery systems, throughout an alternative perspective, which could allow to increase its effectiveness in the Parkinson’s treatment.

Partial molar volume of methanol in water: Effect of polarizability

2009 ◽  
Vol 74 (4) ◽  
pp. 559-563 ◽  
Author(s):  
Filip Moučka ◽  
Ivo Nezbeda
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Intermolecular Interaction ◽  
Feasibility Study ◽  
Partial Molar Volume ◽  
Water Effect ◽  
Ambient Conditions ◽  
Cpu Time ◽  
Low Alcohol ◽  
Very High

The available pairwise additive intermolecular interaction models used so far in simulations in combination with common combining rules do not seem to be able to reproduce the most distinct feature of aqueous solutions of alcohols, the minimum of the partial molar volume at low alcohol concentrations. Nonetheless, this fundamental failure seems to have been paid little attention to, partly because of very high requirements for accuracy and, hence, CPU time of simulations. As an attempt to go beyond empirical combining rules and account in a more physical and yet simple way for the cross interactions, a feasibility study has been undertaken using a polarizable model of water in molecular simulations of the water–methanol mixture at ambient conditions. It turns out that the inclusion of polarizability may qualitatively change the behavior of the mixture bringing the result in agreement with experiment.

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