The Neuroscience Associates web site has some information
about the technique, with nice photomicrographs.
http://www.NSALabs.com/Stains/silver_degen.htm
There are also informative, well illustrated links 
from this page. The method is called "Amino Cupric 
Silver." The name De Olmos isn't mentioned; possibly
they've modified the original and aren't saying how.

NA is a firm in Knoxville TN owned by a Dr Robert
Switzer. They do staining and other lab work for
researchers.
-- 
-------------------------------
John A. Kiernan
Department of Anatomy and Cell Biology
The University of Western Ontario
London,   Canada   N6A 5C1
   kiernan[AT]uwo.ca
   http://publish.uwo.ca/~jkiernan/
   http://instruct.uwo.ca/anatomy/530/index.htm
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