[Histonet] EM question

[Cheryl Crowder]

I am the first to admit I know little to nothing about EM.  I have a 
researcher who read an article today that said in the method that they had 
taken cells, applied them to copper EM grids and immersed them in liquid 
nitrogen to fix them.  Has anyone ever heard of this technique? and if you 
have, do you have any directions or references for this technique?
Cheryl