A side note about ice formation...

This might have already been mentioned, but I have personally used a shower cap 
over cryo-bowls and it seems to do a reasonable job - ice seems to form quicker 
on the shower cap than in the bowl. Covering the bowl with an old Styrofoam lid 
from a spare shipping box does a decent job too - you can use a craft knife to 
make it a tight fit.

AGS

> Date: Thu, 9 Oct 2008 10:18:32 -0500
> From: [EMAIL PROTECTED]
> Subject: Re: [ccp4bb] foam dewar usage ?
> To: CCP4BB@JISCMAIL.AC.UK
> 
> A good cover -- judiciously used -- goes a very long way in reducing ice 
> in dewars whether the dewar is made of foam, glass or stainless steel.
> 
> If you keep your dewar covered with a lid that extends on the outside of 
> the dewar down a few centimeters below the dewar edge, you will have 
> minimal icing in the dewar.  It actually doesn't even matter what the lid 
> is made of.  I use the covers of DVD/CDROM packs.  I try to remove the 
> cover only for a second or two when plunging crystals and immediately 
> cover the dewar again.  From my experience, most folks leave the lids off 
> too often and for too long.  Typically, they walk away leaving the lid 
> off.  It's no surprise that ice accumulates.
> 
> If you leave the dewar open to the moist air, you will get ice in the 
> dewar no matter what it is made of.
> 
> Some simple prophylactic habits will go a long way to practically 
> eliminate ice in the dewar.
> 
> Jim

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