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The gelation process of deacylated gellan gum was studied using gradient NMR. The concentration of semi-stiff coil solute (i.e., non-aggregated) gellan chains was estimated from the echo-signal intensity, and the self-diffusion coefficient of pullulan, which was added as a probe, was measured using pulsed-field-gradient stimulated-echo (PFG-STE) NMR. A model was suggested for the calculation of the...
The diffusion coefficients of pullulan added in gellan gum solutions as a probe polymer were measured using pulsed-field-gradient stimulated-spin-echo (PFG-Ste) 1 H NMR in order to investigate the gelation mechanism and gel structure. The echo intensity of gellan was steeply decreased at around the gelling temperature T gel indicating stiffening of the gellan chains upon aggregation...
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