Electron microscope
hideAn 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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News tagged with electron microscopy
Engineers image nanostructure of a solid acid catalyst and boost its catalytic activity
Nanotechnology / Nanomaterials
10 hours ago |
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The catalytic processes that facilitate the production of many chemicals and fuels could become much more environmentally friendly thanks to a breakthrough achieved by researchers from Lehigh and Rice Universities.
Gene mutation may reveal clues for treating lung diseases
Oct 15, 2009 |
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(PhysOrg.com) -- A genetic mutation found in four children born with multiple abnormalities may provide insight into potential treatments for newborn lung distress and chronic obstructive pulmonary disease (COPD).
Silence of the genes
Oct 13, 2009 |
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The molecular architecture of a protein complex that helps determine the fate of human cells has been imaged for the first time by researchers with the U.S. Department of Energy's Lawrence Berkeley National ...
To peer inside a living cell
Oct 06, 2009 |
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(PhysOrg.com) -- Quantum mechanics could help build ultra-high-resolution electron microscopes that won't destroy living cells, according to MIT electrical engineers.
Scientists get detailed glimpse of chemoreceptor architecture in bacterial cells
Sep 24, 2009 |
4.5 / 5 (2) |
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Using state-of-the-art electron microscopy techniques, a team led by researchers from Caltech has for the first time visualized and described the precise arrangement of chemoreceptors—the receptors that sense ...
Neurons found to be similar to Electoral College
Medicine & Health / Neuroscience
Sep 14, 2009 |
4.2 / 5 (5) |
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A tiny neuron is a very complicated structure. Its complex network of dendrites, axons and synapses is constantly dealing with information, deciding whether or not to send a nerve impulse, to drive a certain action.
Study shows how disruption of spectrin-actin network causes lens cells in the eye to lose shape
Sep 14, 2009 |
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A network of proteins underlying the plasma membrane keeps epithelial cells in shape and maintains their orderly hexagonal packing in the mouse lens, say Nowak et al. The study will appear in the September ...
Extremophile Yields a Key Cog in Life's Protein Factory
Sep 10, 2009 |
4.5 / 5 (2) |
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(PhysOrg.com) -- Peering at single molecules within an organism that makes its home near thermal vents, Yale University scientists have discovered the structure of a key player in the creation of protein-making ...
Scientists Image the 'Anatomy' of a Molecule (w/ Video)
Aug 28, 2009 |
4.8 / 5 (43) |
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(PhysOrg.com) -- For the first time, IBM researchers in Zurich, Switzerland, have taken a 3D image of an individual molecule. Using an atomic force microscope, the researchers constructed a "force map" of ...
A safe approach to nanotechnology: Boiling up zinc oxide nanorods without toxic solvents
Nanotechnology / Nanomaterials
Aug 19, 2009 |
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A non-toxic and environmentally friendly way to make tiny nanorods of zinc oxide has been developed for the first time by researchers in Saudi Arabia. The approach, described in the current issue of the International Journal of ...
Researchers Record First Real-Time Direct Observations of Nanocrystal Growth in Solution (w/ Video)
Aug 07, 2009 |
4.9 / 5 (8) |
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(PhysOrg.com) -- The veil is being lifted from the once unseen world of molecular activity. Not so long ago only the final products were visible and scientists were forced to gauge the processes behind those ...
Novel mechanism revealed for increasing recombinant protein yield in tobacco
Aug 06, 2009 |
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Elastin-like polypeptides (ELPs) cause plants to store GM proteins in special 'protein bodies', insulating them from normal cellular degradation processes and increasing the overall protein yield. Researchers writing in the ...
Protein 'Tweek' rare but critical in synaptic process
Medicine & Health / Neuroscience
Jul 29, 2009 |
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(July 29, 2009) - Recycling is a critical component in the process of transmitting information from one neuron to the next, and a large protein called Tweek plays a critical role, said an international consortium of researchers ...
Laser-created temporal lens could lead to movies of molecular processes
Jun 29, 2009 |
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(PhysOrg.com) -- Finding a way to observe and record the behavior of matter at the molecular level has long been a holy grail among physicists. That ability could open the door to a wide range of applications ...
White blood cells move like millipedes, scientists show
May 04, 2009 |
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How do white blood cells - immune system 'soldiers' - get to the site of infection or injury? To do so, they must crawl swiftly along the lining of the blood vessel - gripping it tightly to avoid being swept away in the blood ...
