Magnetic ferro fluid

Gomert, P. Buske, N. (2000) Preparation, characterization and applications of ferro-fluids. 5 Intertech Conference, Berlin Goss, C.J. (1988) Saturation magnetization, coercivity and lattice parameter changes in the system Fe304 - y- Fe203, and their relationship to structure. Phys. Chem. Min. 16 164-171... 

The self-organization phenomena in colloids of magnetic nanopartides (ferro-fluids) induced by external magnetic fields has attracted considerable attention on the basis of importance from both fundamental and applied perspectives [31]. However, the lack of systematic investigations, combined with some contradictory findings, have led to these materials remaining a relative novelty. Wirtz et cd. [32] have suggested that the formation of macroscopic 1-D periodic patterns composed of... 

Magnetic field active gel utilizing super paramagnetic property of a ferro-fluid-immobilized gel. O/ ferrofluid 75wt% O, ferrofluid 50wt% , ferrofluid 25wt%. 

The primcay pumps have a top entry, single mixed flow impeller and a flywheel to extend the run-down time on loss of power supply. A decision was taken to opt for a simple design without valves which implies all three pumps must be available for reactor operation. An innovative feature, recently introduced to the pump design, is a magnetic upper bearing with a ferro-fluid seal to eliminate oil and the potential hazard of its ingress into the sodium completely. 

Dry dense medium (pneumatic fluidized-bed) separation has been used, but has not received wide attention by the industry. An area of promise for future development is the use of magnetically stabilized dense medium beds by using ferro or magnetic fluids (2,10). Laboratory and pilot-scale units such as Magstream are available. In this unit, material is fed into a rotating column of water-based magnetic fluid. Particles experience centtifugal forces and... 

Figure 7. Adsorption properties of ferro-carbon particles. (A) Absorption spectra of supernatant fluid after mixing methylene blue solution with the adsorbents and magnetic sedimentation of them. FC-2,3,4 adsorb methylene blue more efficiently, than Cefesorb. (B) Adsorption isotherm of methylene blue on FCM. (C) Kinetics of doxorubicin sorption on FC-4. The adsorption process is rapid, and it takes about 1 h to reach saturation. (D) Kinetics of doxorubicin desorption from FCA. The drug is slowly released in about 14—15 days.

Y Morimolo, K Sugibayashi, M Okumura, Y Kato. Biomedical applications of magnetic fluids. I, Magnetic guidance of ferro-colloid-entrapped albumin micro-spheres for site specific drug delivery in-vivo, S. Pharm. Dyn, 3 264-267. 1980. 

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