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NMR studies of calcium induced alginate gelation. Part II. The internal bead structure

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Hills, BP Godward, J Debatty, M Barras, L Saturio, CP Ouwerx, C

Proton NMR relaxation, diffusion and microimaging techniques were used to investigate the internal structure of calcium alginate gel beads formed by dripping a sodium alginate solution into a calcium chloride solution. It is shown that many of the pore structures previously reported are probably artefacts of sample preparation. Evidence is presented for a non-uniform calcium alginate concentration profile even in beads that have been 'equilibrated' in calcium chloride solution for over 24 h. It is found that the internal structure depends on the ratio of calcium and alginate concentrations and a microstructural phase diagram can be constructed. Copyright (C) 2000 John Wiley & Sons, Ltd.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2000
Language Anglais
Journal information "Magnetic Resonance in Chemistry" - Vol. 38, no. 9, p. 719-728 (2000)
Peer reviewed yes
Publisher John Wiley & Sons Ltd (W Sussex)
issn 0749-1581
e-issn 1097-458X
Publication status Publié
Affiliation UCL
Keywords NMR ; calcium-induced alginate gelation ; internal bead structure
Links
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Bibliographic reference Hills, BP ; Godward, J ; Debatty, M ; Barras, L ; Saturio, CP ; et. al. NMR studies of calcium induced alginate gelation. Part II. The internal bead structure. In: Magnetic Resonance in Chemistry, Vol. 38, no. 9, p. 719-728 (2000)
Permanent URL http://hdl.handle.net/2078.1/43344