• [NED] natief
  • [ENG] native
  • [REM] natief preparaat = native preparation
natief preparaat: ‘Ongekleurd monster, dat als regel onder de microscoop wordt bekeken.’ 
(Online Woordenboek van de Diergeneeskunde)(via: https://www.encyclo.nl/lokaal/10765)
An introduction to sample preparation and imaging by cryo-electron microscopy for structural biology

[…]

3.2. Vitrification

Sample preparation techniques such as staining and plastic embedding involve the dehydration of biological specimens, which fundamentally removes them from their native, aqueous environment. 

[…]

3. Grid preparation

Once the specimen is ready, it must be prepared for imaging by EM. To image with electrons, a microscope is maintained under a high vacuum, in which hydrated biological specimens would dehydrate rapidly. Thus to image a biological specimen, it must be fixed, preferably in a native (or native-like) state.”

–https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4854231/ (2020-03-18)