microrheology

microrheology

[¦mī·krō·rē′äl·ə·jē]
(mechanics)
A branch of rheology in which the heterogeneous nature of dispersed systems is taken into account.
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Synopsis: Microrheology is a technique used to measure the rheological properties of a medium, such as microviscosity, via the measurement of the trajectory of a flow tracer (a micrometre-sized particle).
Influence of neuraminidase on the characteristics of microrheology of red blood cells.
The micron-sized, inert fluorescent silica-based tracer particles used in the microrheology experiments were provided as a courtesy by a research group at the University of Twente, the Netherlands.
According to the company, the Zeta-sizer Nano ZSP brings unique protein measurement and novel microrheology capabilities to its range of dynamic light scattering (DLS) systems.
This article deals with a new domain of rheology, called microrheology, for the measurement of the viscosity and elasticity of materials such as suspensions, gels, and emulsions used in different industries like cosmetic, pharmaceutical, food, and paints.
Topics include:colloid science in food nutrition & the relationship of texture to sensory perception of food materials, it also discusses the exploitation of surfactant mesophases for nanoscale encapsulation, the interfacial rheological properties of mixed interfaces, the dynamics & microrheology of gels & emulsions, the stability of droplets & bubbles, the effects of thermal & mechanical processing on food colloid stability & the electrostatic interactions of proteins with polysaccharides
We will elucidate the intimate relation between structure, activity and mechanical properties of dense active suspensions using microrheology experiments, in which we will analyse the fluctuations of a probe driven through the active material by means of an optical tweezing.
Using the model, it was observed that the viscosities of PS and PMMA were reduced with the decrease of die diameter, and the slip velocities were increased with the increase of shear stress, which agrees well with polymer microrheology based on the microscale effect.
Carrington comes to Malvern Instruments from MicroRheology Ltd.
Overall, these objectives aim at expanding and generalising interfacial microrheology to much shorter time-scales, as well as to provide critical insight to the mechanisms underlying particle stability and self-assembly at interfaces.