So here is a new one, I seem to have an oily substance at the end of our Oxford 
Cryostream.  It is greenish in color and I honestly have no idea where it may 
be originating from.  The tubes leading into the head look clean.  I first 
noticed it on the paddle I use to block it when mounting crystals and then 
noticed on the tip as seen in the picture below.  I also wiped it out of the 
little alignment pin that Oxford provides.  The cold stream head is about 23 
years old and I think may have been one of the first Series 600 installed in 
the US.  I have a newer one, but need to pump the head out before using it but 
I really would like to know were the oil maybe from.

Thanks,
Len

Leonard Thomas, Ph.D.
Biomolecular Structure Core, Director
Oklahoma COBRE in Structural Biology
Price Family Foundation Institute of Structural Biology
University of Oklahoma
Department of Chemistry and Biochemistry
101 Stephenson Parkway
Norman, OK 73019-5251
Office: (405)325-1126
lmtho...@ou.edu<mailto:lmtho...@ou.edu>
http://www.ou.edu/structuralbiology/cobre-core-facilities/mcl
[cid:427E3824-3047-4B73-8CF1-36C3ED51633E]

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