Medical research

How the body makes triglycerides

Doctors regularly warn their patients that having high levels of triglycerides, a major dietary fat, can increase the risk of heart disease, diabetes, obesity and fatty liver disease. There is considerable interest in finding ...

Medical research

Coronavirus SARS-CoV-2 infects cells of the intestine

Researchers from the Hubrecht Institute in Utrecht, Erasmus MC University Medical Center Rotterdam, and Maastricht University in the Netherlands have found that the coronavirus SARS-CoV-2, which causes COVID-19, can infect ...

Medical research

Researchers successfully repair stroke-damaged rat brains

Researchers at Lund University in Sweden have succeeded in restoring mobility and sensation of touch in stroke-afflicted rats by reprogramming human skin cells to become nerve cells, which were then transplanted into the ...

HIV & AIDS

How HIV develops resistance to key drugs discovered

The mechanism behind how HIV can develop resistance to a widely-prescribed group of drugs has been uncovered by new research from the Crick and Dana-Farber Cancer Institute, with the findings opening the door to the development ...

Neuroscience

The highways of our brain

Researchers from the Netherlands Institute for Neuroscience (NIN) used a new technique to show how electrical impulses are traveling at high speed in the brain. It appears that myelin, the sheath around neurons, creates a ...

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Electron microscope

An electron microscope is a type of microscope that uses a particle beam of electrons to illuminate a specimen and create a highly-magnified image. Electron microscopes have much greater resolving power than light microscopes that use electromagnetic radiation and can obtain much higher magnifications of up to 2 million times, while the best light microscopes are limited to magnifications of 2000 times. Both electron and light microscopes have resolution limitations, imposed by the wavelength of the radiation they use. The greater resolution and magnification of the electron microscope is because the wavelength of an electron; its de Broglie wavelength is much smaller than that of a photon of visible light.

The electron microscope uses electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane relative to the specimen. This manner is similar to how a light microscope uses glass lenses to focus light on or through a specimen to form an image.

This text uses material from Wikipedia, licensed under CC BY-SA