title: [On the stoichiometry of intercellular Na+/K(+)-exchange].
abstract: Literature data on the atomic and ionic sizes of sodium (Na+) and potassium (K+), and the thermodynamic, and physicochemical characteristics of solutions containing Na+ and K+ have been compared. It was shown that in solutions containing Na+ only the activity of H+ is 1.31 +/- 0.038 times higher than in solutions containing only K+. It was concluded that there is reason to believe that the stoichiometry of Na+/K(+)-exchange is close to 3:4. The different degree of hydratation of Na+ and K+ caused by different density of their charges is considered to be the main reason for the result obtained.
authors.forename: I G
authors.initials: IG
authors.lastname: Gerasimov
mesh_terms: D002414:Cations, Monovalent / Q000737:chemistry / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D017136:Ion Transport / Q000502:physiology; D011188:Potassium / Q000737:chemistry* / Q000378:metabolism; D012964:Sodium / Q000737:chemistry* / Q000378:metabolism; D013816:Thermodynamics
chemical_list: D002414:Cations, Monovalent; D012964:Sodium; D011188:Potassium