Thomas,
I cant believe that after a 4 year hiatus I re-subscribed to ccp4bb for the
sole purpose of making a post on the history and evolution of foam Dewars at
the ALS!
Until a few days ago I had been living life blissfully unaware of the foam
Dewar thread. Then for some reason you began cop
thanks, gerry.
sorry to jog the memory.
wrote:
Thomas,
I can’t believe that after a 4 year hiatus I re-subscribed to ccp4bb for the
sole purpose of making a post on the history and evolution of foam Dewars at
the ALS!
Until a few days ago I had been living life blissfully unaware of the ‘foam
I just wanted to pass along a very nice trick I learned this last week for
preventing ice build up in and around the foam dewars. This technique was
suggested to George Meigs at ALS 8.3.1 by some users from the former SGX.
Place a large Kimwipe sheet over the top of the dewar before putting the
44
fax (650)926-3292
cell (650)714-6001
smb.slac.stanford.edu
-Original Message-
From: CCP4 bulletin board on behalf of Thomas Earnest
Sent: Thu 9/10/2008 4:07 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] foam dewar usage ?
Jean-Baptiste,
Since these were conceived and developed by
:[EMAIL PROTECTED] Behalf Of Artem Evdokimov
Sent: Thursday, October 09, 2008 6:37 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] foam dewar usage ?
Maybe we're not talking about the same kind of container? We never had any kind
of particles** in ours and with the use of a lid the ice doe
I often use styrofoam boxes from dry ice shipments. Works like a charm if the
box is quite new (i.e. not reused too often)
-Original Message-
From: "Smith, Clyde" <[EMAIL PROTECTED]>
Subj: Re: [ccp4bb] foam dewar usage ?
Date: Thu Oct 9, 2008 8:26
Size:
jected
to LN2. This would rapidly freeze the water inside the foam layer and bust
up the pores, resulting in particulates.
_
From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of Van
Den Berg, Bert
Sent: Thursday, October 09, 2008 11:03 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re:
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 lo
the foam Dewars and started his own company
to sell them and has done very well (personally, I find them an excellent
alternative to the glass dewars)
Corie
- Original Message -
From: Thomas Earnest <[EMAIL PROTECTED]>
Date: Thursday, October 9, 2008 4:08 am
Subject: Re: [ccp4bb
For crystal freezing and such we have largely replaced glass and
stainless Dewars with foam ones here at the CAMD PX beamline.You
can get them directly from www.spearlab.com for USD 100.I agree
that the lid supplied with the foam Dewar is not very good but you can
easily make a
From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] Behalf Of
[EMAIL PROTECTED]
Sent: Thursday, October 09, 2008 8:50 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] foam dewar usage ?
Yes, we use them all the time and they're great. Stuff does not slip
on
the bottom like it does in the
> If they really do cost $160, your best bet might be to email your friendly
> local synchrotron group and ask if they will make you something at a fraction
> of the price ...
Or just pay up. 160 USD is not a lot when compared to other
consumables likes chemicals or crystal screens. The dewars l
5 USA
ph (650)926-8544
fax (650)926-3292
cell (650)714-6001
smb.slac.stanford.edu
-Original Message-
From: CCP4 bulletin board on behalf of Thomas Earnest
Sent: Thu 9/10/2008 4:07 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] foam dewar usage ?
Jean-Baptiste,
Since these were c
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
UK
Subject: Re: [ccp4bb] foam dewar usage ?
Hmmm, that's funny. Our experience was quite the opposite. The first time we
used one of the darker small dewars we ended up with a lot of burr in the LN2.
Those got picked up by the cryo and we ended up with lilac particles embedded
inside th
The low-form foam dewar is really nice to work with. Fills easily
without excessive boiloff, and holds level pretty well while working
with crystal loops and vials. Best of all, not much ice will accumulate
at the top of the container while working. Best of all, my
undergraduates can't break it
We've loved them from ages ago when I had our workshop make some. (They
didn't like making them, though, so thanks to SPEARLAB for doing it
instead!)
In fact, spearlab made a green lid on our request which overhangs the
edge; I think it'll now be standard, or something like that.
He also m
cp4bb] foam dewar usage ?
Yes, we use them all the time and they're great. Stuff does not slip on
the bottom like it does in the glass Dewars and the formation of ice is
greatly reduced. Plus, they're much easier to dry.
Artem
> Does anyone in the biocrystallogaphy community u
Yes, we use them all the time and they're great. Stuff does not slip on
the bottom like it does in the glass Dewars and the formation of ice is
greatly reduced. Plus, they're much easier to dry.
Artem
> Does anyone in the biocrystallogaphy community use foam dewars for
> handly liquid nitrogen an
Jean-Baptiste--
We switched to these foam dewars this year, & everyone in our lab uses
them now. After having one of the old style glass ones explode during a
late night synchrotron adventure, these foam dewars are a welcome change!
annie
Annie Hassell
Glaxo Smithkline
5 Moore Drive
RTP,
James, for a LN container like this I don't think people would even consider
putting these plastic things into the autoclave for pasteurization. I had
used these at GM-CA [EMAIL PROTECTED] more than once and always wish to have
one in
the lab - less ice formation on the rim, hence in the liquid in
Jean-Baptiste,
Since these were conceived and developed by Jon Spear when he was a
member of my
group (at the ALS at the time), I know a bit about these Dewars, their
intended usage, and relative benefits.
When Jon first made them, the beamline users and staff quickly realized
the advantages,
we have those 800ml dewars at our beamlines and I would not by them
anymore. The green lid is not really insulating and the working area
inside the cylinder is too small. In order to use it for sample
manipulations, one has to fill it completely with LN2, which will cause
uncontrolled LN2 spill
They work fine and they don't break if you drop them. Bear in mind
that they aren't resistant to a lot of chemicals and that you can't
autoclave them. Also, the $160 price tag suggests a lucrative market
niche for someone who has rudimentary skill with a carpet knife.
On Oct 9, 2008, at 1:
Dear all,
Does anyone in the biocrystallogaphy community use foam dewars for
handly liquid nitrogen and freezing/manipulating frozen protein
crystals ?
We are interested in the following dewar package from Hampton Research
:
http://www.hamptonresearch.com/products/ProductDetails.aspx?cid=24&s
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