Abstract
The volumetric properties of amino acids ( dl-glycine, dl-alanine, dl-serine, l-aspartic acid, l-lysine, and l-leucine) in aqueous solution of nonionic surfactant hexadecyl poly[oxyethylene(25)] alcohol (C 16A 25) are studied. The values of apparent molar volumes V ϕ , partial molar volumes V 2 , m 0 and volumes of transfer Δ t 2 V 2 , m 0 are calculated. The changes of volumes of transfer are discussed in terms of hydrophilic–hydrophobic interactions. The linear correlation of V 2 , m 0 for a amino acids is utilized to calculate the contribution of the charge groups ( N H 3 + , CO O − ) , CH 2 group and other alkyl chains of amino acids to V 2 , m 0 .
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