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Modeling in Cellular Biomechanics
Published in Joseph D. Bronzino, Donald R. Peterson, Biomedical Engineering Fundamentals, 2019
Alexander A. Spector and Roger Tran-Son-Tay
stress bers. In contrast, particle tracking microrheology probes the viscoelastic properties of the intracellular milieu by probing the spontaneous displacements of nanoparticles lodged in the cytoplasm of living cells (Wirtz, 2009). is approach allows probing the local, frequency-dependent viscoelastic moduli of cells by analyzing the mean-squared displacements of the cytoplasm-embedded nanoparticles (Tseng et al., 2002).
Local phase transitions in driven colloidal suspensions
Published in Molecular Physics, 2018
Local information about the non-equilibrium properties of complex fluids can be obtained from microrheology experiments [1]. In passive microrheology, the thermal motion of a mesoscopic probe particle is tracked, typically using microscopy or diffusing wave spectroscopy, to obtain its mean-squared displacement. From this, one can infer the viscoelastic moduli by means of a generalised Stokes–Einstein relation. In the case of active microrheology, the tracer displacement is measured as it is pulled through the medium with a given force, typically implemented using either laser tweezers or magnetic fields. The force–displacement relation thus obtained represents a local analogue of a standard constitutive equation relating the macroscopic stress to the strain [2–4].
Rheological and microrheological characterization of a novel amphoteric xanthan gum
Published in Journal of Dispersion Science and Technology, 2018
Shuang Liu, Hong Zhang, Bo Fang, Yongjun Lu, Xiaohui Qiu, Wen Zhai, Liwei Wang, Kejing Li
The optical microrheology method was also adopted to investigate the microrheological behavior of AXG and XG solutions. The AXG solution exhibited a higher viscosity index at zero shear and more obvious solid-like behavior than the XG solution, and good agreement was found when comparing the results obtained from microrheology to classical rheology. Microrheology also can reflect the solution properties not well described by the current rheological approach, such as zero-shear viscosity behavior. In particular, the simple, fast, and noninvasive way the information can be obtained from microrheology may make microrheological technique a better method for industrial application.