We have seen such behaviour connected to temperature fluctuations.<br><br>Jan<br><br><br><div class="gmail_quote">On Mon, Nov 28, 2011 at 6:04 PM, Harman, Christine <span dir="ltr">&lt;<a href="mailto:[log in to unmask]"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind1111%26L%3DCCP4BB%26E%3Dquoted-printable%26P%3D16280900%26B%3D--0016368e1da30e435f04b2cfed5b%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a>&gt;</span> wrote:<br>
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<div>Hi All,</div>
<div>I have just noticed a very strange thing and need some help in understanding it.  I recently found two crystals in a condition from a screen (0.05M Calcium chloride dihydrate, 0.1M M Bis-Tris pH6.5 and 30% PEG MME 550).  The small crystals appeared after
a month and started to grow over the next 5 days after I first saw them (see pictures attached).  I just check the same drop today and now the crystals are gone.  So I was wondering what happened and if anyone experienced this before.  Any insight or advice
on what to do would be greatly appreciated.</div>
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<div>Thanks </div>
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<div>Christine</div>
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<div>Small                           5 days later</div>
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</blockquote></div><br><br clear="all"><br>-- <br>Jan Dohnalek, Ph.D<br>Institute of Macromolecular Chemistry<br>Academy of Sciences of the Czech Republic<br>Heyrovskeho nam. 2<br>16206 Praha 6<br>Czech Republic<br><br>Tel: +420 296 809 390<br>
Fax: +420 296 809 410<br>