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Preparation of Samples for Electron Microscopy

Preparation of Samples for Electron Microscopy

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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Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...

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Related Experiment Video

Updated: Jan 15, 2026

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Published on: June 6, 2025

Sample Science Traceability Matrix for Perseverance's Mars Sample Return Collection.

María-Paz Zorzano¹, Andrew D Czaja², Tanja Bosak³

¹Centro de Astrobiología (CAB), CSIC-INTA, Madrid, Spain.

|October 6, 2025

Summary

This summary is machine-generated.

The Mars Sample Return campaign uses a Sample Science Traceability Matrix (SSTM) to link Martian samples collected by the Perseverance rover to specific science goals. This framework maximizes the scientific value of returned samples for astrobiology and planetary evolution research.

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Last Updated: Jan 15, 2026

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Area of Science:

Planetary Science
Astrobiology
Geology

Background:

The Mars Sample Return (MSR) campaign is retrieving samples from Mars' Jezero Crater, collected by the Perseverance rover.
Comprehensive laboratory analyses on Earth are planned for these carefully selected and documented Martian samples.