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Related Concept Videos

Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

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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...
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Preparation of Prokaryotic and Eukaryotic Organisms Using Chemical Drying for Morphological Analysis in Scanning Electron Microscopy SEM
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Comprehensive protocol for preparing diatom cell samples and associated bacterial consortia for scanning electron

Margaux Maillard1, Nicolas Stephant2, Atsuko Tanaka3

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Summary

This study details a method for preparing the model diatom Phaeodactylum tricornutum and its associated bacteria for scanning electron microscopy. Proper sample preservation is key for observing cellular structures and interactions.

Keywords:
MicrobiologyMicroscopyModel Organisms

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Area of Science:

  • Microbiology
  • Microscopy
  • Marine Biology

Background:

  • Accurate observation of microorganisms like diatoms requires meticulous sample preparation.
  • Electron microscopy offers high resolution for studying cellular morphology and interactions.
  • Preserving native microbial communities alongside host cells is crucial for ecological studies.

Purpose of the Study:

  • To present a detailed protocol for preserving Phaeodactylum tricornutum and its native bacterial community.
  • To enable high-resolution imaging of diatom-bacteria interactions using scanning electron microscopy.
  • To provide a reproducible method for sample preparation in microbial ecology.

Main Methods:

  • Diatom fixation and coverslip preparation.
  • Washing, dehydration, and drying procedures.
  • Sample metallization and scanning electron microscopy observation.

Main Results:

  • Successful preservation of Phaeodactylum tricornutum cell integrity.
  • Preservation of the native bacterial community associated with the diatoms.
  • Demonstration of cellular morphology and potential interactions via scanning electron microscopy.

Conclusions:

  • The presented protocol ensures high-quality sample preservation for electron microscopy.
  • This method facilitates the study of diatom-associated bacterial communities.
  • The protocol is valuable for research in microbial ecology and marine biology.