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Bat Guano
High magnification photos.
An electron microscope is a type of microscope that uses electrons to illuminate and create an image of a specimen. It has much higher magnification and resolving power than a light microscope, with magnifications up to about two million times compared to about two thousand, allowing it to see smaller objects and greater detail in these objects. Unlike a light microscope, which uses glass lenses to focus light, the electron microscope uses electrostatic and electromagnetic lenses to control the illumination and imaging of the specimen. http://en.wikipedia.org/wiki/Electron_microscope
Pic: a scanning electron microscope image of a modern human head louse, Pediculus humanus.
>> Bat Guano
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The original form of electron microscopy, Transmission electron microscopy (TEM) involves a high voltage electron beam emitted by a cathode, usually a tungsten filament and focused by electrostatic and electromagnetic lenses. The electron beam that has been transmitted through a specimen that is in part transparent to electrons carries information about the inner structure of the specimen in the electron beam that reaches the imaging system of the microscope. The spatial variation in this information (the "image") is then magnified by a series of electromagnetic lenses until it is recorded by hitting a fluorescent screen, photographic plate, or light sensitive sensor such as a CCD (charge-coupled device) camera. The image detected by the CCD may be displayed in real time on a monitor or computer.
Pic: electron microscope image of the compound eye of the Antarctic krill Euphausia superba.
>> Bat Guano
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Even at greater magnification.
>> Bat Guano
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Unlike the TEM, where electrons of the high voltage beam form the image of the specimen, the Scanning Electron Microscope (SEM)[5] produces images by detecting low energy secondary electrons which are emitted from the surface of the specimen due to excitation by the primary electron beam. In the SEM, the electron beam is rastered across the sample, with detectors building up an image by mapping the detected signals with beam position.

Generally, the TEM resolution is about an order of magnitude greater than the SEM resolution, however, because the SEM image relies on surface processes rather than transmission it is able to image bulk samples and has a much greater depth of view, and so can produce images that are a good representation of the 3D structure of the sample.
Pic: scanning electron microscope image of juvenile forms of the dog parasite Toxocara canis.
>> Bat Guano
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Example of a depth hoar crystal collected from the base of a snowpit in Wyoming. Comparison of video (light) and Low Temperature Scanning Electron Microscopy images of the identical crystal illustrates that the faceting and internal features in the video image are somewhat compromised by the transmitted, reflected and refracted light that occurs with the light microscope. The external features are more distinct in the Low Temperature Scanning Electron Microscope image.
>> Am I that Anonomys? !ihIJhGxLaE
Hey bat, can I get some hi-res intense magnifications of a 5.56 Nato?
>> Bat Guano
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>>170721
Nah, but here's the PseudoColor version of the above ice crystal.
>> Bat Guano
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This is a scanning electron microscope image from normal circulating human blood. One can see red blood cells, several white blood cells including lymphocytes, a monocyte, a neutrophil, and many small disc-shaped platelets. Red cells are nonnucleated, and contain hemoglobin, containing iron an important protein which allows the cell to carry oxygen to other parts of the body. They also carry away carbon dioxide from the lungs. The infection-fighting white blood cells, are classified in 2 main groups: granular and agranular. Granulocytes are formed in bone marrow, agranulocytes are produced by lymph nodes and spleen. There are two types of agranulocytes: lymphocytes, fight disease by producing antibodies and thus destroying foreign material, and monocytes. Platelets are tiny cells formed in bone marrow and are necessary for blood clotting.
>> Bat Guano
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Staphylococcus aureus, the most common cause of hospital-acquired infections and a rapidly spreading source of community-associated illness.
>> Bat Guano
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Need more bugs, mites, and spider pictures!
>> Anonymous
yes, yes, yes, ive used them both extensively before...but what i want to know is this...SEMs only work on conductive materials...semi conductors at a push, everything else has to be plated first (usually gold in the case of ceramic/composites) - how do all this biological pictures look so clean and smooth? all my coated specimens came out bits and messy.
>> Bat Guano
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>>170730
Materials to be viewed under an electron microscope may require processing to produce a suitable sample. The technique required varies depending on the specimen and the analysis required.
Go to http://en.wikipedia.org/wiki/Electron_microscope
to read about sample preparation.
Pic: a house dust mite, from www.HouseDustMite.org and that the picture is courtesy of Electron Microscopy and Audio Visual unit of the London School of Hygiene and Tropical Medicine.
>> Anonymous
cccooooooooooool.
>> ­
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Head of a tapeworm.
>> Anonymous
Great, I'm gonna feel itchy all day
>> Am I that Anonomys? !ihIJhGxLaE
bump for more please

Translation for those of you who only speak 4chan:

BUMP FER MOAR PLOX
>> Anonymous
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These were posted earlier in another thread
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I'll be back later with some more
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Bricks have been shat.
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fin
>> Anonymous
>>171457
WHAT IN THE NAME OF GOD IS THAT?
>> Anonymous
>>171466
Electron micrograph of a nicotine leaf I think. Looks like something by Giger.
>> Anonymous
fuck this thread

culmination of like 8 phobias in high resolution
>> Anonymous
>>171461
This shit skeeves me out in a big way.
>> Bat Guano
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>>171463
Thanks!

Have an electron micrograph of Yersinia pestis bacteria (the cause of bubonic plague) in the foregut of the flea vector.
>> Bat Guano
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electron micrograph of Salmonella typhimurium (colored red) invading cultured human cells.
>> Bat Guano
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An electron micrograph of a microns wide ratchet.

The beginnings of nano-technology, I would assume.
>> Anonymous
>>171751
>> Anonymous
Bat Guano, you are a god amongst men!

>>171751
i find this odd... what kind of material do they use to make this? i don't think it can be very durable
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Insect eggs.
>> Bat Guano
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>>171819
Source is http://www.memx.com/
Bulk micromachining is a fabrication technique which builds mechanical elements by starting with a silicon wafer, and then etching away unwanted parts, and being left with useful mechanical devices. Typically, the wafer is photo patterned, leaving a protective layer on the parts of the wafer that you want to keep. The wafer is then submersed into a liquid etchant, like potassium hydroxide, which eats away any exposed silicon. This is a relatively simple and inexpensive fabrication technology, and is well suited for applications which do not require much complexity, and which are price sensitive.
Pic: electron micrograph of MEMS post style actuator.