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Journal of Solution Chemistry - Enthalpies of solution of purine and adenine in water and in demethylsulfoxide were measured calorimetrically in the temperature range 25–40°C. ΔH s... 相似文献
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Enthalpies of solution of thymine and uracil in water and in dimethylsulfoxide (DMSO) were measured calorimetrically in the temperature range 25–40°C. H
s
o
at 25°C for thymine and uracil in water were found to be 23.1±0.5 and 29.5±0.3 kJ-mol–1, respectively. In DMSO, H
s
o
were 7.9±0.1 and 10.2±0.1 kJ-mol–1, respectively. In aqueous solution C
p
o
for the two nucleic acid bases were relatively large and positive with C
p
o
of thymine being larger. Both transfer quantities H
t
o
and C
p,t
o
for the proceses H2ODMSO for the two nucleic acid bases were negative. It is proposed that, the differences in the values obtained for the two bases is due principally to increased order in the water adjacent to the methyl group in thymine. 相似文献
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