Volumetric, Compressibility and UV Spectral Studies on Interactions of Amino Acids with Aqueous Solutions of Potassium Dihydrogen Phosphate at Different Temperatures

Density and Viscosity Study of Interactions of Some Amino Acids in Aqueous Solutions of Sodium Benzoate

“…The S V and V 0 ϕ values and their standard uncertainties are reported in Table S2 and include V 0 ϕ values for the aqueous amino acid solutions without added sodium benzoate, which are compared in Table S3 with other prior studies at a temperature of 308.15 K, for which many values are reported. The V 0 ϕ values reported in this study are in agreement with the literature values in Table S3 within about 2% and mostly within 1%. ,,,− …”

“…5 However, some solute−solute interactions appear to be present because the S V values in Table S2 are all greater than zero. 5,31,32 Addition of sodium benzoate appears to increase solute−solute interactions because the S V values for all three aqueous amino acid solutions are higher when sodium benzoate is present than when it is absent, although further increases in sodium benzoate appear to reverse this effect, especially at higher temperatures (Table S2). A similar behavior for the additive concentration dependence of S V values has also been observed for volumetric studies on amino acids with citrate.…”

Thermophysical Properties of 1-Hexyl-3-methylimidazolium Salicylate as an Active Pharmaceutical Ingredient Ionic Liquid (API-IL) in Aqueous Solutions of Glycine and l-Alanine

“…This phenomenon suggests the stronger interactions between the zwitterionic center of glycine and [HMIm][Sal] which result in the decrease of the solvation layer volume. 34 The comparison of V ϕ 0 and Δ tra V ϕ 0 with data presented in the literature 21 indicates that these values increase with an increase in the alkyl chain length of the cation. For example, the Δ tra V ϕ 0 values for glycine in aqueous solution of [BMIm][Sal] and [HMIm][Sal] with 0.3 molality are 0.80 and 1.05, respectively.…”

Densities and Speeds of Sound of Solutions of Glycine, l-Alanine, and l-Valine in Aqueous Ammonium Dihydrogen Phosphate at Different Temperatures

“…Ample research − has been carried out on thermodynamic properties of amino acids in aqueous electrolyte solutions, carbohydrates, surfactants, etc. but the phosphates salts are still found in limited study. − The phosphates are biologically and industrially important salts which are employed in food, cosmetics, and pharmaceutical industries and also in numerous biochemical studies. − The present work is just a continuation of our earlier laboratory work on the volumetric and ultrasonic properties of amino acids and peptides with phosphate salts of biological importance. − To explore more on phosphate salts, we hereby delineate the densities and speeds of sound of glycine, l -alanine and l -valine in aqueous ammonium dihydrogen phosphate (ADP) solutions at different temperatures (288.15, 298.15, 308.15, and 318.15) K and atmospheric pressure.…”