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Spatial mapping of flow induced molecular alignment in a noncrystalline biopolymer fluid using double quantum filtered (DQF) 23Na MRI

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Figure

Figure 2. Repeat unit of the polyelectrolyte molecule of xanthan. Na+cations interact with the polysaccharide molecule but are also in rapidexchange with free Na+ in the solution and will exchange intra- andintermolecularly with other repeat units.
Figure 3. Rheology of 0.5% xanthan in a 0.1 M phosphate buAt lower deformations, elastic behavior dominates up to strainbehavior index7.0: (a) Storageflrapidly decreasing with the applied shear rate
Figure 6. SQ, MA DQF, and velocityblue solid line. The regions of high MA DQF signal intensity (i)ReAvance III microimaging system at a 105.86 MHz 23Na images of xanthan fluid at = 0.158

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