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Ultrasonic study of interactions of some nonpolar amino acids in aqueous-semicarbazide hydrochloride solutions at different temperatures Jyoti Gupta and Anil Kumar Nain* Department of Chemistry, Dyal Singh College (University of Delhi), New Delhi – 110 003, India *Corresponding author E-mail address: firstname.lastname@example.org Abstract Ultrasonic speed and its derived parameters provide substantial information regarding solute-solute and solute-solvent interaction between the component molecules in solutions. The ultrasonic speeds, u and densities of glycine/l-alanine/l-valine/l-isoleucine in aqueous isoniazid (1% and 2% semicarbazide hydrochloride in water, w/w) solvents were measured at different temperatures and at atmospheric pressure. Using the experimental u and density data, the apparent molar volumes, limiting apparent molar volumes, apparent molar compressibilities, limiting apparent molar compressibilities, transfer volumes, transfer compressibilities, and limiting partial molar expansibilities, have been calculated. These parameters have been discussed in terms of solute-solute and solute-solvent interactions prevailing in these solutions. The structure making/breaking ability of these amino acids in aqueous-semicarbazide hydrochloride solutions is also discussed.
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