Iron magnetic

Magnetic - from a place called Magnesia where magnetic iron oxide (Magnetite) occurred naturally. 

Mag netic Tapes. Chromium dioxide, Cr02, is used as a ferromagnetic material in high fidelity magnetic tapes (qv). Chromium dioxide has several technical advantages over the magnetic iron oxides generally used (58,246). 

Eisenoxydul-hydrat, n. ferrous hydroxide, iron(ll) hydroxide, -oxyd, n. ferrosoferric oxide, iron(II,III) oxide, magnetic iron oxide (FeaOi). -salz, n. ferrous salt, iron(II) salt, -sulfat, n. ferrous sulfate, iron(II) sulfate, -verbindung, /. ferrous compound, iron(ll) compound. 

Thrner gauges may be used to determine scale thickness in situ. These are Wheatstone bridge circuit devices that have proved very useful for 40 years or so. As with chloral thermocouples, calibration may be difficult, and the level of magnetic iron content (magnetite) in the deposit may affect the readings. More modem electronic versions, similar to paint thickness testers, are now available. 

Only three elements are naturally magnetic iron, cobalt, and nickel. 

Magnetic iron oxide nanoparticles synthesis, stabilization, vectorization, physicochemical characterizations, and biological applications. Chemical Reviews, 108 (6), 2064-2110. 

Laurent, S., Bridot, J.L., Elst, L.V. and Muller, R.N. (2010) Magnetic iron oxide nanopartides for biomedical applications. Future Medicinal Chemistry, 2 (3), 427 149. 

Tan, Y.W., Zhuang, Z.B., Peng, Q. and Li, Y.D. (2008) Room-temperature soft magnetic iron oxide nanocrystals ... 

P. Calvert and A. Broad, Biomimetic routes to magnetic iron oxide-polymer composites. In K.L. Mittal (Ed.), Polymers in Information Storage Technology, Plenum Press, New York, 1991, p. 257. 

Rudge, S.R., Kurtz, T.L., Vessely, C.R., Catterall, L.G. and Williamson, D.L. (2000) Preparation, characterization and performance of magnetic iron-carbon composite microparticles for chemotherapy. Biomaterials, 21, 1411-1420. 

Magnetic (iron oxide core) microspheres have been imprinted with S-pro-pranolol. The magnetism allowed the facile separation of the imprinted beads from the liquid matrix. The particles exhibited the expected affinity towards the template molecule. This technique was also proposed as a putative tool for cell sorting [81]. 

Graft polymerization of monomers such as acrylic acid on core particles consisting of magnetic iron oxide embedded in cross-linked poly (vinyl alcohol) (PVA) has been described previously (2). 

Brain JD, Bloom SD, Valberg PA, Gehr P (1984) Correlation between the behavior of magnetic iron oxide particles in the lungs of rabbits and phagocytosis. Exp Lung Res 6 115-131. 

Mixed metal oxide pigments containing iron oxide are also used (see Section 3.1.3). Magnetic iron oxide pigments are discussed in Sections 5.1.1 and 5.1.2. Transparent iron oxide pigments are described in Section 5.4.1. Methods of analysis and specifications of iron oxide pigments are listed in the standards given in Table 1. 

The saturation magnetization Ms is a specific constant for the material and for magnetic iron oxides is principally determined by the Fe2 + ion content. The ratio of remanent magnetization to saturation magnetization (Mr/Ms) for the tape depends mainly on the orientation of the pigment needles with respect to the longitudinal direction of the tape, and should approach the theoretical maximum value of unity as closely as possible. 

Producers of magnetic iron oxides include BASF and Bayer (Germany) Ishihara, Sakai, Titan K., and Toda K (Japan) 3 M, Mitsui, Magnox, and ISK Magnetics (USA) Saehan Media (Korea) and Herdilla (India). 

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