Part of the Biological Separations book series (BIOSEP)
Magnetic Microspheres in Cell Separation
The term magnetization refers to the appearance of a magnetic dipole of magnitude m in a body, either spontaneously or when it is placed in a magnetic field of magnitude H. The magnetization of a material M is a point variable which depends on the applied magnetic field H and the chemical composition. It is defined as
where V is the volume of the body. Because in most materials M is zero when H = 0 and increases monotonically with H,a material parameter, the magnetic susceptibility ϰ is defined as
Most organic materials have small negative values of ϰ and so are diamagnetic. Paramagnetic materials have small positive values of ϰ such as hematite, Fe2O3, (ϰ = 4.54 × 10−9 H/m). Ferromagnetic materials have much larger values; ϰ for iron exceeds 10−2 H/m. Both paramagnetic and ferromagnetic materials can be used for cell separation.
KeywordsMagnetic Dipole Hydroxyethyl Methacrylate Cell Separation Magnetite Particle Magnetic Microsphere
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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