عنوان المقالة:تأثرات الحامض الاميني الستين في المحاليل المائية – لداي مثيل فورماميد في درجات حرارة مختلفة. Interaction of Cysteine in aqueous Dimethylformamide Solutions at different temperatures
زينب عباس حسن، اسل احمد عبد الستار، ساجدة هادي رضا
Abstract
Densities ρ and viscosities η of cysteine (Cys) in 2.5% and 5%(w/w)
Dimethylformamide (DMf)-water mixtures have been measured at different temperatures
298.15, 303.15, 308.15 and 313.15 K. From the experimental data molal volume v
, limiting
partial molal volume v
, the slop v S , Jones-Dole B and D-coefficients, Gibbs free energy of
activation for viscous flow of solution * * * G , enthalpy H and entropy S were calculated.
The nature of solute- solvent and solute- solute interactions have been discussed in terms of the
values of v
, v
, v S and B-coefficient.
زينب عباس حسن | Zainab Abbas Hassan | 4032