Medical References
Diseases & Conditions
Women's Health
Mental Health
Men's Health
Healthy Choice News
Site Map Links
Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
Read more health news
Electron microscopy (EM)
Electron microscopy (EM): A microscope in which electron beams replaceslight rays to form the image. EM has its pluses (greater magnification and resolution than optical microscopes) and minuses (you are not really "seeing" objects, but rather their electron densities, and artefacts often abound). Despite such limitations, EM has greatly extended the powers of the microscope.