The Microbial World - Probing Cell Structure: Electron Microscopy

5 important questions on The Microbial World - Probing Cell Structure: Electron Microscopy

What do electron microscopes use instead of photons?

Electrons.

Wat zijn de twee soorten elektronenmicroscopie?

  • TEM
  • SEM

What are the two type of electron microscopes?

  • Transmission Electron Microscopes (TEM)
  • Scanning Electron Microscope (SEM)
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is transmission electron microscopy (TEM)?

In transmission electron microscopy (TEM) electromagnets function as lenses. The system operates in a vacuum. It has a high magnification and resolution (0.2 nm). Specimen must be very thin (20–60 nm). Specimen must be stained (high atomic weight: Au, Pb). This method enables visualization of structures at the macromolecular level.

What is scanning electron microscopy (SEM)?

Using scanning electron microscopy (SEM) a specimen is coated with a thin film of heavy metal (e.g., gold). An electron beam scans the object, scattered electrons are collected by a detector, and an image is produced. Even very large specimens can be observed using this method. The magnification range of an SEM is between 15x–100,000x.

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo