Related topics: cells · cancer cells · protein

Density fluctuations in amorphous silicon discovered

For the first time, a team at HZB has identified the atomic substructure of amorphous silicon with a resolution of 0.8 nanometres using X-ray and neutron scattering at BESSY II and BER II. Such a-Si:H thin films have been ...

Cracking the secrets of dinosaur eggshells

Since the famous discovery of dinosaur eggs in the Gobi Desert in the early 1920s, the fossilized remains have captured the imaginations of paleontologists and the public, alike. Although dinosaur eggs have now been found ...

Academics develop algorithm to analyse HeLa cancer cells

Dr. Cefa Karabag and Dr. Constantino Carlos Reyes-Aldasoro have collaborated with the Francis Crick Institute in preparing and analyzing HeLa cells as part of a research project, documented in the October edition of the PLoS ...

Sensing carbon monoxide

Carbon monoxide is an insidiously toxic gas. It can pervade an enclosed space and causes drowsiness and at sufficiently high concentration is lethal to anyone breathing it. As such, there is a need for efficient and fast-reacting ...

World record resolution in cryo electron microscopy

Holger Stark from the Max Planck Institute for Biophysical Chemistry in Göttingen and his team have broken a crucial resolution barrier in cryo electron microscopy. For the first time, his group succeeded in observing individual ...

Repairing the photosynthetic enzyme Rubisco

Manajit Hayer-Hartl, head of the research group "Chaperonin-assisted Protein Folding," has a long-standing interest in the central enzyme of photosynthesis called Rubisco. Her team has already reported on many of the interacting ...

Moving microscopy beyond the resolution limit

The Polish-Israeli team from the Faculty of Physics of the University of Warsaw and the Weizmann Institute of Science has made another significant achievement in fluorescent microscopy. In the pages of the Optica journal ...

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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.

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