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H-1 NMR diffusometry study of water in casein dispersions and gels

Mariette, F; Topgaard, Daniel LU ; Jönsson, Bengt LU and Söderman, Olle LU (2002) In Journal of Agricultural and Food Chemistry 50(15). p.4295-4302
Abstract
The self-diffusion coefficients of water in casein solutions and gels were measured using a pulsed-gradient spin-echo nuclear magnetic resonance technique (PGSE NMR). The dependence of the self-diffusion coefficient of water on the concentration and structure-of casein is reported. The results were analyzed using a cell model. It was found that the water self-diffusion coefficient is insensitive to the structure of the casein in solution or in a gelled state. The influence of casein concentration on the water self-diffusion coefficient could be explained by obstruction from the casein molecule. Assuming a simple model with two water regions, each characterized by a specific water concentration and value of the water diffusion coefficient,... (More)
The self-diffusion coefficients of water in casein solutions and gels were measured using a pulsed-gradient spin-echo nuclear magnetic resonance technique (PGSE NMR). The dependence of the self-diffusion coefficient of water on the concentration and structure-of casein is reported. The results were analyzed using a cell model. It was found that the water self-diffusion coefficient is insensitive to the structure of the casein in solution or in a gelled state. The influence of casein concentration on the water self-diffusion coefficient could be explained by obstruction from the casein molecule. Assuming a simple model with two water regions, each characterized by a specific water concentration and value of the water diffusion coefficient, the water mobility reduction induced by the casein can be rationalized. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cell model for diffusion, obstruction, NMR, gel, casein, self-diffusion
in
Journal of Agricultural and Food Chemistry
volume
50
issue
15
pages
4295 - 4302
publisher
The American Chemical Society
external identifiers
  • pmid:12105961
  • wos:000176813100024
  • scopus:0037125108
ISSN
0021-8561
DOI
10.1021/jf0115948
language
English
LU publication?
yes
id
2342b8e0-1454-4bfa-8b7f-50b2259bb18f (old id 333746)
date added to LUP
2007-10-11 07:49:50
date last changed
2017-09-10 03:45:33
@article{2342b8e0-1454-4bfa-8b7f-50b2259bb18f,
  abstract     = {The self-diffusion coefficients of water in casein solutions and gels were measured using a pulsed-gradient spin-echo nuclear magnetic resonance technique (PGSE NMR). The dependence of the self-diffusion coefficient of water on the concentration and structure-of casein is reported. The results were analyzed using a cell model. It was found that the water self-diffusion coefficient is insensitive to the structure of the casein in solution or in a gelled state. The influence of casein concentration on the water self-diffusion coefficient could be explained by obstruction from the casein molecule. Assuming a simple model with two water regions, each characterized by a specific water concentration and value of the water diffusion coefficient, the water mobility reduction induced by the casein can be rationalized.},
  author       = {Mariette, F and Topgaard, Daniel and Jönsson, Bengt and Söderman, Olle},
  issn         = {0021-8561},
  keyword      = {cell model for diffusion,obstruction,NMR,gel,casein,self-diffusion},
  language     = {eng},
  number       = {15},
  pages        = {4295--4302},
  publisher    = {The American Chemical Society},
  series       = {Journal of Agricultural and Food Chemistry},
  title        = {H-1 NMR diffusometry study of water in casein dispersions and gels},
  url          = {http://dx.doi.org/10.1021/jf0115948},
  volume       = {50},
  year         = {2002},
}