News tagged with electron microscopy

Related topics: cells , cancer cells , protein

Cocoa may enhance skeletal muscle function

A small clinical trial led by researchers at UC San Diego School of Medicine and VA San Diego Healthcare System (VASDHS) found that patients with advanced heart failure and type 2 diabetes showed improved mitochondrial structure ...

Mar 02, 2012
popularity 5 / 5 (4) | comments 0 | with audio podcast

How chemotherapy becomes more effective

Researchers from the University of Zurich have found a cellular brake that protects cancer cells from chemotherapy -- and they demonstrate which medication can be used to render it inoperative. Their study published in the ...

Mar 05, 2012
popularity 5 / 5 (2) | comments 0 | with audio podcast

Target for obesity drugs comes into focus

(Medical Xpress)—Researchers at the University of Michigan have determined how the hormone leptin, an important regulator of metabolism and body weight, interacts with a key receptor in the brain.

Oct 11, 2012
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New scientific method unmasks chronic infections

Chronic infections are a large and growing problem throughout the developed world, and intensive research is being conducted in ways to combat the recalcitrant bacteria. When bacteria aggregate into so-called biofilm, they ...

Aug 08, 2012
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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