InforLorV4, Main, Exploration, bibRecord, 002806

On the interpretation of transport properties of sodium cholate and sodium deoxycholate in binary and ternary aqueous mixtures

Identifieur interne : 002806 ( Main/Exploration ); précédent : 002805; suivant : 002807

On the interpretation of transport properties of sodium cholate and sodium deoxycholate in binary and ternary aqueous mixtures

Auteurs : Gaetano Mangiapia [Italie] ; Gerardino D'Errico [Italie] ; Fabio Capuano [Italie] ; Ornella Ortona [Italie] ; Richard K. Heenan [Royaume-Uni] ; Luigi Paduano [Italie] ; Roberto Sartorio [Italie]

Source :

PCCP. Physical chemistry chemical physics : (Print) [ 1463-9076 ] ; 2011.

RBID : Pascal:11-0453698

Descripteurs français

Pascal (Inist)
- Propriété transport, Sodium, Mélange ternaire, Tension superficielle, Résonance paramagnétique électronique, Spectrométrie RPE, Diffusion neutron centrale, Coefficient diffusion, Mélange binaire, Micelle, Agrégat, Croissance, Liaison hydrogène, Modèle, Prédiction, Micellisation, Dimension, Composition, Complexe.
Wicri :
- topic : Sodium.

English descriptors

KwdEn :
- Aggregate, Binary mixture, Complexes, Composition, Diffusion coefficient, Dimension, EPR spectrometry, Electron paramagnetic resonance, Growth, Hydrogen bond, Micelle, Micellization, Models, Prediction, Small angle neutron scattering, Sodium, Surface tension, Ternary mixture, Transport properties.

Abstract

Sodium cholate (NaC) and sodium deoxycholate (NaDC) in binary and ternary aqueous mixtures were investigated by means of surface tension, electron paramagnetic resonance spectroscopy (EPR), small angle neutron scattering (SANS) and mutual diffusion coefficient analysis. Concerning the NaC-H₂O and NaDC-H₂O binary mixtures, the surface tension, EPR and diffusion measurements confirmed the formation of micelles above a well detectable critical concentration. The SANS data indicated for both systems, the formation of ellipsoidal micelles whose major axis increased with concentration and minor axis remained constant. The data were interpreted under the assumption that aggregate growth occurred via hydrogen bonding of small aggregates along one preferential direction. For the NaC-NaDC-H₂O ternary mixtures, the surface tension and EPR results were in good agreement with the Clint model prediction for the ideal mixed micellization. Based on this model, the SANS data enabled a complete description of the mixed aggregates in terms of dimensions, composition and concentration. In turn, this strategy allowed for a satisfactory interpretation of the main and cross-term diffusion coefficient trends, which are quite complex.

Affiliations:

Italie, Royaume-Uni

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Le document en format XML

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<term>Diffusion coefficient</term>
<term>Dimension</term>
<term>EPR spectrometry</term>
<term>Electron paramagnetic resonance</term>
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<term>Spectrométrie RPE</term>
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<term>Mélange binaire</term>
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<term>Agrégat</term>
<term>Croissance</term>
<term>Liaison hydrogène</term>
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<front><div type="abstract" xml:lang="en">Sodium cholate (NaC) and sodium deoxycholate (NaDC) in binary and ternary aqueous mixtures were investigated by means of surface tension, electron paramagnetic resonance spectroscopy (EPR), small angle neutron scattering (SANS) and mutual diffusion coefficient analysis. Concerning the NaC-H<sub>2</sub>
O and NaDC-H<sub>2</sub>
O binary mixtures, the surface tension, EPR and diffusion measurements confirmed the formation of micelles above a well detectable critical concentration. The SANS data indicated for both systems, the formation of ellipsoidal micelles whose major axis increased with concentration and minor axis remained constant. The data were interpreted under the assumption that aggregate growth occurred via hydrogen bonding of small aggregates along one preferential direction. For the NaC-NaDC-H<sub>2</sub>
O ternary mixtures, the surface tension and EPR results were in good agreement with the Clint model prediction for the ideal mixed micellization. Based on this model, the SANS data enabled a complete description of the mixed aggregates in terms of dimensions, composition and concentration. In turn, this strategy allowed for a satisfactory interpretation of the main and cross-term diffusion coefficient trends, which are quite complex.</div>
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On the interpretation of transport properties of sodium cholate and sodium deoxycholate in binary and ternary aqueous mixtures

On the interpretation of transport properties of sodium cholate and sodium deoxycholate in binary and ternary aqueous mixtures

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri