MRI of a knee. MRIs employ powerful magnets which produce a strong magnetic field that forces protons in the body to align with that field. When a radiofrequency current is then pulsed through the patient, the protons are stimulated, and spin out of equilibrium, straining against the pull of the magnetic field.
Noun. 1. aestivation - (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period. estivation. zoological science, zoology-the branch of biology that studies animals.
Fax: 1-888-411-2841 www.aspenfasteners.com aspeninfo@aspenfasteners.com Passivation Passivation is a process whereby exogenous iron or iron compounds are removed from the surface of stainless steel by way of chemical dissolution.