News tagged with magnetic

Related topics: magnetic field , electrons , materials , atoms , metal

Scanning for health and disease

Many mysteries still surround the human body. In particular, the molecular and cellular processes of the body's systems and organs, and their occasional malfunctions, remain largely unobserved at the macroscale. ...

Oct 03, 2014
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A safer approach for diagnostic medical imaging

Medical imaging is at the forefront of diagnostics today, with imaging techniques like MRI (magnetic resonance imaging), CT (computerized tomography), scanning, and NMR (nuclear magnetic resonance) increasing steeply over ...

Sep 29, 2014
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Scientists show rise and fall of brain volume

(Medical Xpress)—We can witness our bodies mature, then gradually grow wrinkled and weaker with age, but it is only recently that scientists have been able to track a similar progression in the nerve bundles ...

Sep 19, 2014
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Magnetism

In physics, magnetism is one of the forces in which materials and moving charged particles exert attractive, repulsive force or moments on other materials or charged particles. Some well-known materials that exhibit easily detectable magnetic properties (called magnets) are nickel, iron, cobalt, gadolinium and their alloys; however, all materials are influenced to greater or lesser degree by the presence of a magnetic field. Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, water, and gases.

Magnetism also has other definitions and descriptions in physics, particularly as one of the two components of electromagnetic waves such as light.

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