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Title: Thermodynamic and transport studies on some basic amino acids in aqueous sodium acetate solution at different temperatures
Authors: Thirumaran, S
Inbam, P
Keywords: Molal hydration number
Limiting apparent molal volume
Adiabatic compressibility
Apparent molal compressibility
Issue Date: Jul-2011
Publisher: NISCAIR-CSIR, India
Abstract: Ultrasonic velocity (<i>U</i>), density (<img src='' border=0>) and viscosity (<img src='/image/spc_char/Etta.gif' border=0>) of three amino acids namely l-arginine, l-lysine and l-histidine in aqueous sodium acetate solution (0.4 mol. kg<sup>-1</sup>) as a function of composition at 298.15, 308.15 and 318.15 K, have been measured. Using these experimental values, the acoustical parameters such as adiabatic compressibility (<img src='/image/spc_char/beta.gif' border=0>), molal hydration number (<i>n</i><sub>H</sub>), apparent molal compressibility (<img src='/image/spc_char/phi.gif' border=0><sub>K</sub>), apparent molal volume (<img src='/image/spc_char/phi.gif' border=0><sub>V</sub>), limiting apparent molal compressibility (<img src='/image/spc_char/phi.gif' border=0><sub>K</sub><sup>0</sup>), limiting apparent molal volume (<img src='/image/spc_char/phi.gif' border=0><sub>V</sub><sup>0</sup>), the constants (<i>S</i><sub>K</sub>, <i>S</i><sub>V</sub>) and viscosity <i>B</i>-coefficient of Jones-Dole equations were calculated for all the three systems. These parameters have been thoroughly analysed and eventually emphasizing the possible molecular interactions in terms of structure-making and structure-breaking effects of the above amino acids in the solvent mixture
Description: 451-459
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(07) [July 2011]

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