Interactions of some amino acids with aqueous Manganese chloride tetrahydrate (cas 13446-34-9) at T = (288.15 to 318.15) K: A volumetric and viscometric approach

Add time:08/03/2019    Source:sciencedirect.com

Densities (ρ), sound velocities (u), and viscosities (η) of glycine, dl-α-alanine, dl-α-amino-n-butyric acid, l-valine, and l-leucine, in aqueous solutions (0.1, 0.5, 1.0, and 1.5) mol · kg−1 of Manganese chloride tetrahydrate (cas 13446-34-9), MnCl2·4H2O at different concentrations have been determined using a vibrating-tube digital densimeter, ultrasonic multifrequency interferometer and Ubbelohde type capillary viscometer attached with automatic viscosity measuring unit, respectively, within the temperature range (288.15 to 318.15) K. Partial molar volumes V2o, partial molar adiabatic compressibilities, KS,2o and viscosity B-coefficients have been determined from the above measurements. Further these data were used to calculate the corresponding transfer parameters (ΔtV2o, ΔtKS,2o and ΔtB), hydration numbers, nH, side chain group contributions, partial molar expansibilities, VEo, dB/dT and related parameters. The data are discussed in terms of hydration of hydrophobic and hydrophilic parts of amino acids in these solutions.

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