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Interactions of some amino acids with aqueous tetraethylammonium bromide at 298.15 K: A volumetric approach

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Title Interactions of some amino acids with aqueous tetraethylammonium bromide at 298.15 K: A volumetric approach
 
Creator BANERJEE, T
KISHORE, N
 
Subject partial molar volumes
protein-salt interaction
guanidine-hydrochloride
heat-capacities
thermodynamic properties
denaturation
peptides
lysozyme
systems
water
standard partial molar volume
amino acids
hydration number
tetraethylammonium bromide
 
Description The apparent molar volumes, V-phi,V-2, of glycine, L-alanine, DL-alpha-amino-n-butyric acid, L-valine, and L-leucine have been determined in aqueous 0.25, 0.75, 1.0, and 1.5 mol-dm(-3) tetraethylammonium bromide (TEAB) solutions by density measurements at 298.15 K. These data have been used to calculate the infinite dilution apparent molar volumes, V(2,m)degrees stop, for the amino acids in aqueous tetraethylammonium bromide and the standard partial molar volumes of transfer (Delta(tr) V(2,m)degrees) of the amino acids from water to the aqueous salt solutions. The linear correlation of V(2,m)degrees for a homologous series of amino acids has been utilized to calculate the contribution of the charged end groups (NH3+, COO-), CH2 group, and other alkyl chains of the amino acids to V(2,m)degrees. The results of the standard partial molar volumes of transfer from water to aqueous tetraethylammonium bromide have been interpreted in terms of ion-ion, ion-polar, and hydrophobic-hydrophobic group interactions. The volume of transfer data suggest that ion-ion or ion-hydrophilic interactions are predominant in the case of glycine and alanine, and hydrophobic-hydrophobic group interactions are predominant in the case of DL-alpha-amino butyric acid, L-valine, and L-leucine.
 
Publisher SPRINGER/PLENUM PUBLISHERS
 
Date 2011-08-30T14:18:38Z
2011-12-26T12:58:59Z
2011-12-27T05:49:49Z
2011-08-30T14:18:38Z
2011-12-26T12:58:59Z
2011-12-27T05:49:49Z
2005
 
Type Article
 
Identifier JOURNAL OF SOLUTION CHEMISTRY, 34(2), 137-153
0095-9782
http://dx.doi.org/10.1007/s10953-005-2746-8
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12349
http://hdl.handle.net/10054/12349
 
Language en