Dependence of enthalpies of dissolution of ¦Â-alanyl-¦Â-alanine on the composition of (water + alcohol) mixtures at 298.15 K

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• 作者：Valeriy I.  ; Smirnov  ; ;   ; ^{vis@isc-ras.ru} ;   ; ^{svi5015@ivnet.ru} ; Valentin G.  ; Badelin
• 关键词：Peptides ; Solutions in aqueous alcohols ; Enthalpies of solution and transfer
• 刊名：Thermochimica Acta
• 出版年：2011
• 出版时间：20 September 2011
• 年：2011
• 卷：524
• 期：1-2
• 页码：35-38
• 全文大小：380 K

文摘

The dissolution enthalpies of ¦Â-alanyl-¦Â-alanine in aqueous methanol, ethanol, 1-propanol and 2-propanol solutions with an alcohol content up to 0.4 mole fractions have been measured calorimetrically at T = 298.15 K. The standard enthalpies of dissolution, ¦¤_solH¡ã and transfer, ¦¤_trH¡ã, of ¦Â-alanyl-¦Â-alanine from water into mixed solvents and the enthalpy coefficients of pair-wise interactions, h_xy, of ¦Â-alanyl-¦Â-alanine with alcohol solvent molecules have been calculated. The results are discussed in terms of solute¨Csolute and solute¨Csolvent interactions.