News tagged with electron microscope
Related topics: molecules
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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(Medical Xpress)—New research from the University of Reading could be crucial in the fight to stop the spread of killer viruses such as HIV and avian flu.
Medical research Mar 04, 2013 | not rated yet | 0
Researchers are improving the performance of technologies ranging from medical CT scanners to digital cameras using a system of models to extract specific information from huge collections of data and then ...
Medical research Feb 05, 2013 | 5 / 5 (1) | 0
A team of neuroscientists has proposed a new and potentially revolutionary way of obtaining a neuronal connectivity map (the "connectome") of the whole brain of the mouse. The details are set forth in an essay published October ...
Neuroscience Oct 23, 2012 | 5 / 5 (5) | 1 |
What happens in the brain when we see, hear, think and remember? To be able to answer questions like this, neuroscientists need information about how the millions of neurons in the brain are connected to ...
Neuroscience Oct 23, 2012 | 3.5 / 5 (6) | 1 |
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 ...
Medical research Aug 08, 2012 | 1 / 5 (1) | 0
The hair cells of the inner ear have a previously unknown "root" extension that may allow them to communicate with nerve cells and the brain to regulate sensitivity to sound vibrations and head position, researchers at the ...
Neuroscience Mar 08, 2012 | 4.8 / 5 (5) | 2 |
A 3-D reconstructed image of neural dendritic trees using the advanced electron microscope technology
Neurons in the brain play a role as an electric wire conveying an electrical signal. Because this electric wire is connected with various joints (synapse), various brain functions can occur. A neuron which has dendritic trees ...
Medical research Sep 13, 2011 | 5 / 5 (3) | 0