Volumetric interaction coefficients for some nucleosides in aqueous solution at T=298.15K

Volumetric studies on nucleic acid bases and nucleosides in aqueous guanidine hydrochloride solutions at T=(288.15 to 318.15)K and at atmospheric pressure

“…The V o 2;/ values for these compounds in water agree well with the literature data [6][7][8]11,12,[20][21][22][23]. Most of the data in literature are available at T = 298.15 K only (table 3).…”

“…The density values for aqueous GnHCl solutions are in excellent agreement with those reported by Kumar [17], Makhatadze et al [18], Kawahara and Tanford [19] as shown in figure S1 (given as supplementary material). The density values for binary solutions of the studied solutes have also been compared with the literature data [6,11,[20][21][22] and the comparison by plotting density, d versus molality, m A (where m A is the molality of solute) is shown in figure S2 (given as supplementary material). Comparison shows that the present data is in close agreement with the majority of available literature data, over the studied range of concentration of solutes.…”

“…The positive values of V AB in cytosine and cytidine, and its greater magnitude as compared to V ABB values reveal the dominance of (solvophilic + ionic) interactions, which again strengthen the view that these solutes have more polar character. From the difference in the V o 2;/ values of thymine and uracil in water, we have calculated -CH 2 group contributions ( [6,7,10,12,[20][21][22][23]. However, in aqueous GnHCl solutions the -CH 2 group contribution shows complex behavior (figure 4) which may be attributed to some specific concentration effects.…”

Volumetric, Viscometric, and1H NMR Studies on Caffeine, Theophylline, and Theobromine in Aqueous Solutions of MgCl2at TemperaturesT= (288.15 to 318.15) K and at Pressurep= 101.3 kPa

“…Whereas the magnitude of V ABB is greater in the case of NaCl than MgCl 2 at higher temperatures in all the cases. Higher V AB values are due to stronger hydrophilic–ionic interactions, and more negative V ABB values are due to stronger hydrophobic–ionic interactions. , Thus, there are stronger hydrophobic–ionic interactions in the case of NaCl than that of MgCl 2 at higher temperatures. Therefore, salting-out is greater in the case of NaCl.…”

Volumetric Properties of the Nucleosides Adenosine, Cytidine, and Uridine in Aqueous Solution at T = (288.15 and 313.15) K and p = (10 to 100) MPa

“…The samples of adenosine, cytidine, and uridine were from the same batches of material used in a previous study [13]. Details of the purification and characterization of these samples, and a summary Table that gives the source, purification method, and mass fraction purity for each nucleoside have been reported elsewhere [13].…”