From: Eugene Leitl (eugene.leitl@lrz.uni-muenchen.de)
Date: Tue Feb 22 2000 - 14:38:19 MST
John Clark writes:
> If you plug these numbers into the formula you get a Reynolds number of about 1.
> 1 is a lot less than 2000 so it looks like any mixing caused by freezing
> would probably be laminar not turbulent.
I don't think that the formula is applicable to the actual process
occuring. I am not at all sure that I understand at what is happening
(and the molecular part of the picture as what happens in the 3d
volume is still missing), but the damage appears to be fractal in
nature (i.e. occurs at all scales), and the compression
ratio/displacement of the tissue seem to be very large, which is not
good news.
Macro:
http://4.3.78.106/cryo/ccr4.jpg
http://4.3.78.106/cryo/ccr8.jpg
(the scale below is in mm)
Micro:
http://4.3.78.106/cryo/ccr1.jpg
http://4.3.78.106/cryo/ccr3.jpg
(this is still light micro, probably 300-400x)
The white areas are ice, removed by freeze-substitution.
I'm omitting the cellular scale here, because interpretation is harder
there. As I said, hang on for the comments done by the gurus.
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