کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216238 1426280 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures
چکیده انگلیسی

Densities, ρ, for glycine, l-alanine, l-valine, and l-leucine [(0.05 to 0.30) m] in aqueous lactose solutions ranging from pure water to 6 mass% lactose were determined at T = (293.15, 298.15, 303.15, and 308.15) K. The density was used to compute apparent molar volume, Vφ  , partial molar volume at infinite dilution, Vϕo, and experimental slope, SV   were obtained and interpreted in terms of solute–solvent and solute–solute interactions. These data were used to calculate the (∂Vϕ0/∂T)P values. The partial molar volume of transfer, ΔVϕ0 from water to aqueous lactose solutions at infinite dilution has also been calculated. In addition to this, the linear correlation of Vϕ0 with number of carbon atoms in the alkyl chain of amino acids was utilized to determine the respective contributions of NH3+COO-, and CH2 groups to Vϕ0.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 2, February 2011, Pages 140–146
نویسندگان
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