کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
673987 1459535 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Homotactic enthalpic pairwise interactions of four deoxynucleosides (dU, dC, dG, dT) in dimethylformamide (DMF) + water mixtures at 298.15 K
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Homotactic enthalpic pairwise interactions of four deoxynucleosides (dU, dC, dG, dT) in dimethylformamide (DMF) + water mixtures at 298.15 K
چکیده انگلیسی

The dilution enthalpies of four 2′-deoxynucleosides, namely 2′-deoxyuridine (dU), 2′-deoxycytidine (dC), 2′-deoxyguanosine (dG) and 2′-deoxythymidine (dT), in dimethylformamide (DMF) + water mixtures have been determined at 298.15 K respectively, using an isothermal titration calorimeter (ITC200 MicroCal). On the basis of the McMillan–Mayer theory, the homotactic enthalpic pairwise interaction coefficients (hXX) of the four 2′-deoxynucleosides in DMF + water mixtures of various mass fractions (wDMF = 0–0.30) have been calculated. It was found that the values of hXX of the four 2′-deoxynucleosides are all large negative and increase gradually across the whole studied composition range of the mixed solvent, though the variation degrees of them are somewhat different. The results are discussed from the point of view of solute–solute and solute–solvent interactions in solutions.


► This work focuses on hXX as the measurement of solute–solute interaction.
► Dilution enthalpies of them in mixed solvent were determined by ITC.
► It is found that the hXX values of them are all large negative.
► The hXX values of them increase gradually in certain concentration range.
► We deduced that the strength of interaction follows the order: dC > dT > dT > dU according to hXX.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 549, 10 December 2012, Pages 148–157
نویسندگان
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