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Alphonsus Tam1, Donald C Yu

  • 1University of Alberta, Department of Dentistry, Alberta, Canada.

Compendium of Continuing Education in Dentistry (Jamesburg, N.J. : 1995)
|February 21, 2003
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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...