Cytomagnetometry with ferrimagnetic micro-particles-influence of particle size and dispersity

The macrophage like cell line J774 was used to measure relaxation and intracellular viscosity with ferrimagnetic monodisperse magnetite particles between 0,8 mu m and 2,45 mu m diameter and with polydisperse magnetite dust. Phagocytosis of all particles was above 60%. With increasing particle diamet...

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Bibliographic Details
Published in:Journal of aerosol science 1992-01, Vol.23 (SUPPL 1), p.S519-S522
Main Authors: Moller, W, Guzijan, V, Pohlit, W, Stahlhofen, W, Wenisch, T, Wiegand, J
Format: Article
Language:English
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Summary:The macrophage like cell line J774 was used to measure relaxation and intracellular viscosity with ferrimagnetic monodisperse magnetite particles between 0,8 mu m and 2,45 mu m diameter and with polydisperse magnetite dust. Phagocytosis of all particles was above 60%. With increasing particle diameter d relaxation slowed down. The time constants of a double exponentially decaying relaxation model increased with d super(1,9). Intracellular viscosity was non-Newtonian and showed a decrease with increasing shear rate sr as sr super(-0,86).
ISSN:0021-8502