| | |   Contrast medium. Ever since learning about the fact that gadolinium compounds are used in MRI as a contrast medium, I've been looking for a doctor willing to send me a bottle of it.  I never did find one, but one found me!  I got an email out of the blue from Dr. Willis Chung, who said he and his son would be traveling through the area in a few weeks, and could they stop and visit my table.  Of course I said yes, glad to provide Champaign-Urbana with an actual tourist attraction.  His son remains the only person who has ever been able to identify my zirconium nodules, though it was because he had read so much of my site that he remembered seeing them there.  Chemistry professors who visit me are too busy to have actually read much of my site, and are therefore unable to identify most of the samples.
 Source: Dr Chung
 Contributor: Dr Chung
 Acquired: 25 December, 2004
 Text Updated: 11 March, 2007
 Price: Donated
 Size: 2"
 Purity: <10%
 Sample Group: Medical
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