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Influence of Urea on Shifting Hydrophilic to Hydrophobic Interactions of Pr(NO3)3, Sm(NO3)3, and Gd(NO3)3 with BSA in Aqueous Citric Acid: A Volumetric, Viscometric, and Surface Tension Study
journal contribution
posted on 2014-11-13, 00:00 authored by Dinesh Kumar, Abhishek Chandra, Man SinghDensity, surface tension, and viscosity
for hexahydrate nitrate
salts of praseodymium, samarium, and gadolinium from (0.023 to 0.150)
mol·kg–1 in aqueous solutions of: (a) citric
acid (1.11 mol·kg–1), (b) citric acid + urea,
(c) citric acid + bovine serum albumin, and (d) citric acid + urea
+ bovine serum albumin at 298.15 K and atmospheric pressure are reported.
By using densities and viscosities, the apparent molar volumes, limiting
apparent molar volumes, apparent molar transfer volumes, and viscosity B-coefficients have been calculated. The varying trends
of aforesaid physicochemical parameters have been interpreted in light
of the solute–solvent and solute–solute interactions.
An attempt has thus been made to investigate the influence of urea
on the interacting activities of lanthanide nitrate with citric acid
and the critical role being played by bovine serum albumin in decoding
the dominance of hydrophilic–hydrophobic interactions.