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Wasn't the cell that Ariel describes designed to create a kind of
'instant equilibrium' by layering decreasing concentrations of the sample
on top of one another (as it were) ? Is this what is required here
or would a simpler synthetic boundary or band-forming centrepiece do the
job?<br>
Regards to all<br>
Richard<br>
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<font face="Times New Roman, Times">Dr Richard M Thomas<br>
Institut für Polymere<br>
ETH-Zentrum<br>
CH-8092 Zürich<br>
Switzerland<br>
+41 1 632 5540</font></html>