Acoustical behavior of some amino acids in aqueous disodium citrate solutions over temperature range (298.15-313.15) | [Pakistan Journal of Pharmaceutical Sciences • 2015]

Author(s):

1. K Muhammad Asghar Jamal: Department of Chemistry, Government College University, Faisalabad, Pakistan

2. Muhammad Kaleem Khosa: Department of Chemistry, Government College University, Faisalabad, Pakistan

3. Majid Muneer: Department of Chemistry, Government College University, Faisalabad, Pakistan

4. Fazal-ur-Rehman: Department of Applied Chemistry, Government College University, Faisalabad, Pakistan

5. Muhammad Jawad Saif: Department of Applied Chemistry, Government College University, Faisalabad, Pakistan

6. Haq Nawaz Bhatti: Department of Chemistry, University of Agriculture, Faisalabad, Pakistan

7. Sadaf Naz: Department of Chemistry, Government College University, Faisalabad, Pakistan

8. Jaweria Javed: Department of Chemistry, Government College University, Faisalabad, Pakistan

Abstract:

Sound velocity, U, and density, ρ, of some amino acids viz. glycine, methionine, phenylalanine and tryptophan were determined in 0.1, 0.2 and 0.3 mol kg−1 aqueous disodium citrate solutions as a function of concentration at 298-313.15K using DSA 5000M. The experimental data were further used to compute various acoustical parameters such as adiabatic compressibility, β, apparent molar compressibility, Φk, partial molar compressibility, Φ0 k, transfer adiabatic compressibility, Φ0 ktr, constant, Sk, and the hydration number, nH. The transfer adiabatic compressibility shows the supremacy of hydrophilic-ionic interactions under hydrophobic–ionic interactions. The above-mentioned parameters are relevant for the efficiency of mediation in pharmacology and can be interpreted in terms of structure-making or structure-breaking ability of these amino acids in the solution.

Page(s): 1613-1617

DOI: DOI not available

Published: Journal: Pakistan Journal of Pharmaceutical Sciences, Volume: 28, Issue: 5, Year: 2015

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