The viscoelasticity of dispersions of spherical cells with an anisotropic membrane¹

Article type: Research Article

Authors: Takano, Y.^a | Sakanishi, A.^b

Affiliations: [a] Department of Physics, Faculty of General Studies, Gunma University, Maebashi 371, Japan | [b] National Cardiovascular Center, Suita 565, Japan

Note: [1] Fourth International Congress of Biorheology

Note: [] Accepted by: Editor E. Fukada

Abstract: The rigidity of a dilutely dispersed system of spherical particles having an elastically anisotropic shell is theoretically obtained in the case of material incompressibility. Considering characteristics of biological cells the complex intrinsic viscosity [η∗] of this system is numerically calculated in the case that the medium and the inside region of the shell contain viscous liquids and the shell region is made of an elastic substance. In [η∗] vs. frequency curves anomalies occur at some range of anisotropic parameters. This anomaly may be called a negative relaxation, when the relaxation strength takes a negative value.

Keywords: viscoelasticity, dispersion, cell, anisotropy, membrane

DOI: 10.3233/BIR-1982-19502

Journal: Biorheology, vol. 19, no. 5, pp. 599-611, 1982