Sodium MRI measurement of ion convection-diffusion in swelling gels

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

Convection diffusion of ions plays a major role in munerous cellular processses in biology. A quadriphasic mixture model has been developed to model the coupling between diffusion, convection, swelling and deformation in gels and tissues. Sodium and hydrogen MRI is used to measure convection-diffusion of sodium ions in homogenous ionised gels subject to swelling. A sodium chloride concentration jump from 0.5 M to 0 M at the boundary of a pAA sample is applied. Subsequently, sodium and hydrogen levels are measured in the sample for 5 days. Then the boundary condition is reversed and measurement is continued for another 5 days. The quadriphasic mixture model is fitted to the experimental data to estimate the di??usion coefficient of sodium and chloride. The best fit results were obtained forDNa = 1:1510-5cm2=s and for DCl = 2:1510-5cm2=s. Different time constants were observed for the swelling and deswelling.
Originele taal-2Engels
TitelProceedings of the International Conference on Computational Methods for Coupled Problems in Science and Engineering (COUPLED PROBLEMS 2007) 21-23 May 2007, Santa Eualia, Ibiza, Spain
RedacteurenB., Schrefler, E., Onate
Plaats van productieBarcelona
UitgeverijInternational Center for Numerical Methods in Engineering (CIMNE)
Pagina'sMoM03-1/4
StatusGepubliceerd - 2007
Evenementconference; Intl. Conference on Computational Methods for Coupled Problems, CIMNE, Barcelona, Spain - Barcelona, Spanje
Duur: 1 jan 2007 → …

Congres

Congresconference; Intl. Conference on Computational Methods for Coupled Problems, CIMNE, Barcelona, Spain
LandSpanje
StadBarcelona
Periode1/01/07 → …
AnderIntl. Conference on Computational Methods for Coupled Problems, CIMNE, Barcelona, Spain

Vingerafdruk Duik in de onderzoeksthema's van 'Sodium MRI measurement of ion convection-diffusion in swelling gels'. Samen vormen ze een unieke vingerafdruk.

Citeer dit