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The hydration of selected biologically relevant molecules – the temperature effect on apparent molar volume and compression

Abstrakt

The densities and sound velocities at T = (288.15, 293.15, 298.15, 303.15 and 308.15) K were measured for aqueous solutions of glycine, trimethylamine-N-oxide, taurine and N-methylacetamide. From these data, the apparent molar volumes, V the apparent molar isentropic compressions, KS,, and the Passynski hydration numbers of solutes were determined. The concentration dependencies of the calculated quantities, their limiting values and temperature characteristics are discussed in terms of solute-solvent and solute-solute interactions. The obtained data clearly show strong hydration of the molecules of glycine, trimethylamine-N-oxide and taurine. Opposite effect, i.e. weak interactions with water molecules, is found for N-methylacetamide.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF MOLECULAR LIQUIDS nr 274, strony 345 - 352,
ISSN: 0167-7322
Język:
angielski
Rok wydania:
2019
Opis bibliograficzny:
Kaczkowska E., Wawer J., Tyczyńska, M., Jóźwiak, M., Krakowiak J.: The hydration of selected biologically relevant molecules – the temperature effect on apparent molar volume and compression// JOURNAL OF MOLECULAR LIQUIDS. -Vol. 274, (2019), s.345-352
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.molliq.2018.10.155
Weryfikacja:
Politechnika Gdańska

wyświetlono 166 razy

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