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The hydration of sodium dehydrocholate micelles

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Abstract

The hydration of micellised sodium dehydrocholate molecules was determined by viscosity measurements. It was found that there are 39 water molecules for each micellised surfactant molecule. About ten water molecules may be attributed to the hydration of the sodium carboxylate group. By assignation of two water molecules to each of the three carbonyl groups, the total hydration of a micellised sodium dehydrocholate molecule was estimated as about 16 water molecules. The remaining 23 water molecules per micellised sodium dehydrocholate molecule may be attributed to water trapped in the structure of micelles.

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Acknowledgements

This work was supported by a grant of the Universidad Nacional del Sur. M.A.M. is an assistant researcher of the Concejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET). P.M. has a fellowship from CONICET.

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Correspondence to Pablo C. Schulz.

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Messina, P., Morini, M.A. & Schulz, P.C. The hydration of sodium dehydrocholate micelles. Colloid Polym Sci 281, 695–698 (2003). https://doi.org/10.1007/s00396-002-0853-2

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  • DOI: https://doi.org/10.1007/s00396-002-0853-2

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