Electron microscopy (em) - in which electron opaque substance used to surround the virus showing contrast between electron lucent biological material and background against which it is viewed and beam of accelerated electrons are used as source of illumination.
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EM is a technology to obtain high resolution images of biological and nonbiological specimen. It is used in biomedical researchs to investigate the detailed structure of tissues, cells, organells, macromolecular complexes. The high resolution of the EM results from the use of electrons as the source of illuminating radiation.
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