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A. flavus is a soil-borne fungus that infects peanut pods and grain. Spores from the fungus either spread thorough the air or through contact with soil, resulting in economic losses as well as compromising human health. Swathi Sridharan (ICRISAT)
Yet more views of the things you can't see! Our local photo suppliers and chemists - Dents - had an offer on a Zenith BM100FL microscope. Now I well remember trying to take photos using my sister's microscope way back in the late 1960's and enjoying it although the results were a bit variable. It's now a bit easier to do so having researched the subject I bought the microscope, an adapter to attach a camera and some specimens. Here are the first results and I'll post more on occasions. Now please understand I'm no biologist! I'm just taking pretty pictures but it is fascinating and I'll try to explain specimens when I know something. Each picture will tell you the magnification I used. The colours are not the natural colours of the specimens but dyes used to show the item by transmitted light.
When not giving a presentation of my results, I have to generate them. This photo was taken during my Diploma work. I seem to have an affinity to "micro-". Before I was working with DNA microarrays, I was doing my Diploma thesis in Microbiology. As "micro-" is quite small, you need a microscope to make things visible.
Canon PowerShot G2
Aufnahmedatum/-zeit: 27.05.2003 00:14
Tv (Verschlusszeit): 1/60
Av (Blendenzahl): 5.6
Objektiv: 7.0 - 21.0mm
Brennweite: 7.0mm
Three-dimensional atomic-resolution tomographic imaging requires analyzing a microscopic sample viewed from several directions, followed by a computerized reconstruction of the sample’s 3-D atomic structure. Such an exacting process has eluded researchers for decades, but is now possible with the Transmission Electron Aberration-corrected Microscope (TEAM) Stage. It holds and positions samples inside electron microscopes with unprecedented stability, position-control accuracy, and range of motion.
The technology was developed by Thomas Duden, Nord Andresen, Rich Weidenbach, and Andreas Schmid of Berkeley Lab’s Engineering and Materials Sciences Divisions. Scientists from Attocube Systems, FEI Company, and the University of Illinois at Urbana-Champaign also contributed.
The TEAM Stage will make one of the world’s most powerful electron microscopes even better, and enable previously impossible experiments. Trial-and-error detection of defects in a thin-film nanocrystal solar cell material may be minimized; and the fabrication of new biomaterials for longer-lasting artificial bone implants may be facilitated.
credit: Lawrence Berkeley Nat'l Lab - Roy Kaltschmidt, photographer
XBD200908-00687-01.TIF
This represents 32 pictures covering a 1.8mm field of view of a crystal rock section of Spencer's.
I connected a stepper motor to the fine focusing knob on the Microscope with a bit of clear tubing - shaft to shaft - and then used a Gigapan control board to move the focusing up to capture 32 images.
I had to trigger the photos manually, and tell the Gigapan unit to advance to the next frame.
I now know how to remote trigger the Canon T2i camera, so getting focus stacking to be automatic, with automatic triggerig of the camera, is my next step.
After that I'll move on to xy stage automation
This is part of the nanogigapan project. See nanogigapan.blogspot.com
A laser cut microscope which was a part of my Paper Lab exhibit.
BA (Hons) Art & Design (Interdisciplinary) Final Degree Show, Leeds College of Art.
Dans le cours de Sciences de Mme Danis, nous sommes rendu dans le module du microscope. Voici les parties du microscope et ces fonctions.
Hooke used a compound microscope for many of his observations. He helped to improve the design but it was still difficult to use, requiring great skill and patience.
Hooke referred to it as “My faithful mercury, my microscope”
University of Glasgow Library
Special Collections
Robert Hooke
Micrographia
Sp Coll Hunterian M.3.1