Featured Microscopist: Spike (M.I.) Walker

Vitamin C Quilt Patterns

Vitamin C Quilt Patterns

One of Spike Walker's most notable accomplishments in the field of polarized light microscopy is his ability to control the crystallization of vitamin C from evaporated aqueous solutions. The photomicrograph presented above is from a supersaturated solution placed on a microscope slide that was scratched into approximately 1.5-millimeter squares with a fine needle to provide 'windows' in which crystallization could proceed independently. The preparation was breathed on at 60-second intervals to alter the rate of crystal growth fronts. Illumination was provided by a 12-volt, 100-watt tungsten halide lamp with crossed polarizers. The microscope was a Zeiss Ultraphot III equipped with an automatic 35-millimeter photohead. The film was Fujichrome Velvia. (10x)


Text and graphics for this article are
© 2000-2013 by Spike (M. I.) Walker.
All Rights Reserved under copyright law.
© 1995-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Monday, Dec 01, 2003 at 01:54 PM
Access Count Since November 18, 2000: 6393