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  • INSTRUMENTATION AND PHOTOGRAPHY  (2)
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  • 1
    facet.materialart.
    Unknown
    A simple device for the preparation of embedded materials science specimens for ultramicrotomy (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A simple hand-held grinding fixture is discussed which can produce microtome mounts of hard materials, oriented interfaces, and powders embedded in a 5/16-in plastic rod. The device has been used for the ultramicrotomy of meteorite samples, 10-50 micron interplanetary dust particles, and thin films on plastic. Results are presented for a layer lattice silicate from the Murchison carbonaceous chondrite, illustrating the resolution and structural detail that can be obtained with the method.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Electron Microscopy Technique (ISSN 0741-0581); 6; 305
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Modification of a Kowa RC-2 fundus camera for self-photography without the use of mydriatics (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Research on retinal circulation during space flight required the development of a simple technique to provide self monitoring of blood vessel changes in the fundus without the use of mydriatics. A Kowa RC-2 fundus camera was modified for self-photography by the use of a bite plate for positioning and cross hairs for focusing the subject's retina relative to the film plane. Dilation of the pupils without the use of mydriatics was accomplished by dark-adaption of the subject. Pictures were obtained without pupil constriction by the use of a high speed strobe light. This method also has applications for clinical medicine.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Brain Research Bulletin; 4; 1979
    Format: text
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    NASA TECHNICAL REPORTS
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