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Title: MULTIPLE-PARTICLE TRACKING STUDY OF THE MICROHETEROGENEITY OF BETA-GLUCAN-RICH HYDROCOLLOIDAL EXTRACTIVE SUSPENSIONS

Author
item Xu, Jingyuan - James
item TSENG, YLIDER - JOHNS HOPKINS UNIVERSITY
item Inglett, George
item CARRIERE, CRAIG - FORMER USDA,ARS,CPF
item WIRTZ, DENIS - JOHNS HOPKINS UNIVERSITY

Submitted to: International Congress on Rheology
Publication Type: Proceedings
Publication Acceptance Date: 5/1/2004
Publication Date: 8/27/2004
Citation: Xu, J., Tseng, Y., Inglett, G.E., Carriere, C.J., Wirtz, D. 2004. Multiple-particle tracking study of the microheterogeneity of beta-glucan-rich hydrocolloidal extractive suspensions. In: Proceedings of the International Congress on Rheology. Paper No. SU49:1-3.

Interpretive Summary:

Technical Abstract: Nutrim is a newly developed food product containing the dietary soluble fiber beta-glucan. The microstructural heterogeneities of Nutrim-10 suspensions were investigated by monitoring the thermally driven displacements of well-dispersed microspheres via video fluorescence microscopy. By comparing the distribution of the time-dependent mean-square displacement (MSD) of polystyrene microspheres embedded in three concentrations of Nutrim-10 suspensions, we found that the degree of heterogeneity of the suspensions increased dramatically within a narrow range of Nutrim-10 concentrations. The ensemble-averaged MSD of 5.5% Nutrim-10 suspension exhibited a power-law behavior scaling linearly with time, which was similar to the behavior for a homogeneous aqueous glycerol solution. But the MSD distribution was wider and more asymmetric than for glycerol. Increasing Nutrim-10 concentration rendered the MSD distribution much more asymmetric and skewed.