Interactions of some amino acids with aqueous manganese chloride tetrahydrate at T = (288.15 to 318.15) K: A volumetric and viscometric approach

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• 作者：Tarlok S. Banipal ; ^{tsbanipal@yahoo.com} ; Jasbir Kaur ; Parampaul K. Banipal
• 关键词：Amino acids ; Manganese chloride tetrahydrate ; Partial molar volumes ; Partial molar adiabatic compressibilities ; Viscosity ; Partial molar expansibilities
• 刊名：Journal of Chemical Thermodynamics
• 出版年：2012
• 出版时间：May 2012
• 年：2012
• 卷：48
• 期：Complete
• 页码：181-189
• 全文大小：439 K

文摘

Densities (¦Ñ), sound velocities (u), and viscosities (¦Ç) of glycine, dl-¦Á-alanine, dl-¦Á-amino-n-butyric acid, l-valine, and l-leucine, in aqueous solutions (0.1, 0.5, 1.0, and 1.5) mol ¡¤ kg^? of manganese chloride tetrahydrate, 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 , partial molar adiabatic compressibilities, and viscosity B-coefficients have been determined from the above measurements. Further these data were used to calculate the corresponding transfer parameters (, and ¦¤_tB), hydration numbers, n_H, side chain group contributions, partial molar expansibilities, , dB/dT and related parameters. The data are discussed in terms of hydration of hydrophobic and hydrophilic parts of amino acids in these solutions.