X-Message-Number: 27489
From: 
Date: Tue, 17 Jan 2006 04:06:47 EST
Subject: NMR vitrification anymore ?

Nearly one year ago, an information surfaced about nuclear magnetic  

resonance (NMR) inducing a glass state in supercooled water. Some fast thinking

asumed the information was not reliable... It would be neverthless interesting  
to 
try some test about it.
 
On a theoretical ground, the spin coupling between protons and electron let  
the idea that NMR larmor precession and induced  magnetisation right angle  
turn could induce some jerk in water molecules able to start nucleation  

freezing. In common magnetic fields, one atom out of one million get magnetized,
this seems low, but there is the so called T2 spin exchange process : Spin  

polarisation jump from atom to atom on a time scale of some tens of  
milliseconds. 
In one minute, nearly one thousand atoms have been polarised, one  after 

another. If freezing comes on that time scale or longer, each ice crystal  could
be 
no more than 1000 molecules large, this is nearly a glass state.
 
What would be requested to do the experiment ?
 
First, there must be a magnet to produce the Larmor precession  frequency.
 
Second, there must be an electronics system able to produce pi/2 magnetic  
flips and pi echo recovery. The hydrogen Larmor frequency is : 4.27  kHz/Gauss.
 
Third, there must be a cooling system without magnetic part, for example  
something using exhaust of compressed gas from a plastic pipe.
 
If that worked, it could be used for free water in the body and linked one  

at large molecular surface, the Larmor's frequency is not quite the same. Even
more, vibrating phosphorous (P31 frequency : 1.723 kHz/Gauss) or/and sodium  
(Na23 frequency : 1.126 kHz/Gauss ) could protect selectively the many cell  

membranes. All of that would be produced without toxicity and without chemicals
 hard to remove.
 
I would be interested to know if someone is currently looking at these  
possibilities or if someone or some group would be interested.
 
Yvan Bozzonetti.


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