2016. - V. 30. - N 6(175). - P. 62-64
Ilya Andreevich Shestakov, Alexandra Olegovna Mariyanac, Olga Sergeevna Gorshkova, Ko Ko Htun Ye, Alexey Borisovich Sazonov,
Distribution of tritium between water and carbohydrates (glucose, fructose, ribose, and deoxyribose) in their aqueous solutions at 293 K has been studied with equilibrium evaporation technique. Dynamics of activity loss shows water in dilute solutions being in two different forms, free and bound water. Distribution of tritium moved towards bound water. Constants of isotope equilibrium between free water and carbohydrate molecules are within a range from ~2 to ~3, i.e. in all cases carbohydrates are enriched with tritium. Results of quantum statistics calculations using molecule force fields obtained within semiempirical methods AM1 and PM3 are in agreement with experimental data.
First page of the article:
bound water carbohydrate solutions deoxyribose free water fructose glucose isotope equilibrium constant mass distribution ratio ribose tritium глюкоза дезоксирибоза константа равновесия реакции изотопного обмена массовый коэффициент распределения растворы углеводов рибоза свободная вода связанная вода тритий фруктоза