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Electron Scanning Microscope determines common origin paper, ink, toner, pencil
My interest in antique microscopes, started when I had the chance of restoring a Leitz Ortholux instrument, destined for dumping after having been discarded by my Institute. It is not really antique, just vintage , but it revived my passion for microscopes and gave me the feeling of restoring an old instrument. It is now displayed in my office and perfectly functioning with all its original parts. Little later, I found a Leitz microscope dating on sale at a very reasonable price. It was not in mint condition, but a closer look told me that it was probably possible to restore it. I bought it and spent a couple of months polishing and repairing it I was right, no major damages. It then took me six additional months to find on ebay all the missing parts and accessories original Leitz and of the same age , but in the end I had a fully functioning, perfect example of a first-class German research microscope of the XIX century.
Take a 'cell-fie' using your phone and this small microscope adapter
A scanning electron microscope SEM is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that contain information about the surface topography and composition of the sample. The electron beam is scanned in a raster scan pattern, and the position of the beam is combined with the intensity of the detected signal to produce an image. In the most common SEM mode, secondary electrons emitted by atoms excited by the electron beam are detected using an Everhart-Thornley detector.
Tags: archives; Explore Your Archive; malaria; microscope; , london school of tropical medicine , parasitology , Public Health England. The staining techniques for slides — for example the use of gentian violet — has changed considerably since the 19 th century, but oocysts and gametocytes were seen, and the results were photographed under the microscope by Cheryl Whitehorn. Blood slide stained with gentian, showing Plasmodium parasite as gametocyte.