The paper presents an experimental study of the instability of a magnetic fluid layer of finite thickness covering a magnetizable metal plate exposed to a perpendicular magnetic field. The critical field strength and the instability wave number have been measured.

The penetrating finger instability which develops when a less viscous fluid pushes a more yiscous fluid can be stabilized through the use of a magnetizable fluid in the presence of a magnetic field tangential to the interface. A uniform magnetic field only stabilizes suitably short waves traveling along the field lines. Transverse waves of all wavelengths and orientations are also stabilized if...

We compared conventional charcoal separation of antibody-bound and free antigen with a novel method involving magnetizable particles containing charcoal. The magnetizable charcoal separation method was as effective as the conventional method for a wide range of radioimmunoassays, including those for several steroids and small polypeptide hormones. In a detailed comparison of conventional vs. ma...

The effect of a spatially uniform magnetic field on the shear rheology dilute emulsion monodispersed ferrofluid droplets, immersed in non-magnetizable immiscible fluid, is investigated using direct numerical simulations. direction applied normal to flow direction. droplets extra stress tensor arising from presence interfacial forces nature modeled basis seminal work G. K. Batchelor, J. Fluid Me...

This paper seeks to carry out the rigorous homogenization of a particulate flow consisting non-dilute suspension viscous Newtonian fluid with magnetizable particles. The is assumed be described by Stokes flow, while particles are either paramagnetic or diamagnetic, for which magnetization field linear function magnetic field. coefficients corresponding partial differential equations locally per...

This paper concerns the rigorous periodic homogenization for a nonlinear strongly coupled system, which models suspension of magnetizable rigid particles in nonconducting carrier viscous Newtonian fluid. The fluid drags and thus alters magnetic field. Vice versa, field acts on particles, turn affect via no-slip boundary condition. As size approaches zero, it is shown that suspension’s behavior ...

We developed and validated a magnetizable solid-phase fluoroimmunoassayfor directlydeterminingquininein serum or urine. We prepared the Immunogen by coupling quinine hemisuccinate to keyhole-limpet hemocyanine, usingthis to immunizethree sheep, and couplingthe antiserato magnetizable solid-phaseparticlesto facilitateseparationof bound antigen from interferingcomponentsof serum or urine. We test...

We describe a one-step, labeled-antibody radioassay for measuring free thyroxin (FT4) in serum or plasma, based on a novel principle. FT4 in the sample competes with a gross molar excess (over antibody) of a cross-reactant (L-triiodothyronine, T3), chemically coupled to magnetizable polymer particles, for binding to avid 125l-labeled monoclonal anti-thyroxin antibodies. As in conventional immun...