Volumetric, Viscometric, and Refractive Index Studies of Some alfa-Amino Acids in Aqueous Tartrazine at Different Temperatures

• Autorzy: Ali A. , Patel R. , Shahjahan , Tasneem S.
• Języki publikacji: EN

Abstrakty

EN

The densities (r), viscosities (h), and refractive indices (nD) of (0.10, 0.15, 0.20, 0.25, and 0.30) m glycine, L-alanine, and L-valine were measured in 0.01 m aqueous tartrazine at 288.15, 293.15, 298.15, 303.15, 308.15, and 313.15 K. The measured data were utilized to evaluate various use ful parame ters, viz., apparent molar volume, (fi ni ), partial molar volume, (fi ni o), partial molar isobaric expansibility, (fi i E o ), transfer volume (fi ni o (tr)), A and B – coefficients of viscosity, free energy of activation of viscous flow per mole of solvent (Delta mi 1 o*) and solute (Delta mi 2o*) and molar refractivity (RD). The linear varia ion of fi ni o with the number of carbon atoms (nC) present in the alkyl chain of amino acids was also considered for the evaluation of the contribution of zwitterionic end groups (NH3 + , COO–) and methylene groups to fi ni o. The results were used to discussion–ion, ion–nonpolar and nonpolar–nonpolar interactions and the presence of structural hydration in the present systems.

Słowa kluczowe

EN

densities; viscosities; refractive indices; amino acids; aque oustartrazine; partial molar volumes; activation parameters; interactions

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2009
• Tom: Vol. 83, nr 7
• Strony: 1353--1363
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Ali A.

autor

Patel R.

autor

Shahjahan

autor

Tasneem S.

• Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi – 110025, India Tel.: [phone]x3257,

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