Re: [ccp4bb] powdery residue on pucks?

[Zachary A. Wood]

We only notice the dust when we let pucks thaw while still assembled. We had 
always assumed that the dust was due to oxidation (different types of metals in 
contact with the water from condensation). We have not seen the dust since we 
began taking apart pucks and removing pins prior to thawing them. Since doing 
this, we have also noticed that the pin bases are less prone to oxidation, 
which is nice (and supports our electrochemistry hypothesis).  Maybe give that 
a try?

Best regards,

Z

***
Zachary A. Wood, Ph.D.
Associate Professor and Graduate Coordinator
Department of Biochemistry & Molecular Biology
University of Georgia
Life Sciences Building, Rm A426B
120 Green Street
Athens, GA  30602-7229
Office: 706-583-0304
Lab:706-583-0303
FAX: 706-542-1738
***




On Feb 22, 2020, at 3:42 AM, Steiner, Roberto 
<2497b6493202-dmarc-requ...@jiscmail.ac.uk>
 wrote:

[EXTERNAL SENDER - PROCEED CAUTIOUSLY]

Fully agree with what others have said. When ’the dust’ happened to us we had 
to replace that particular shipping dewar as T was not holding for very long.

Best wishes
Roberto

On 22 Feb 2020, at 00:33, Emilia C. Arturo (Emily) 
mailto:ecgart...@gmail.com>> wrote:

Hi All,

We have been noticing lately that our crystal pucks return from different 
beamlines coated with the same powdery material. For the record, we typically 
undo our pucks, clean the assemblies and dry out the pucks within a day of 
receiving the shipping dewar, but notice the same thing regardless of how long 
between receiving the dewar and disassembling the pucks. Have any of you 
experienced this sort of thing, or have suggestions of what might be the cause 
and/or the powdery material?

Regards,
Emily.

--
"Study as if you were going to live forever; live as if you were going to die 
tomorrow." - Maria Mitchell

"I'm not afraid of storms for I'm learning to sail my ship."  - Louisa May 
Alcott




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Professor Roberto Steiner
Randall Centre for Cell and Molecular Biophysics
Faculty of Life Sciences and Medicine
King's College London

roberto.stei...@kcl.ac.uk
Phone 0044 20 78488216
Fax0044 20 78486435

Room 3.10A
New Hunt's House
Guy's Campus
SE1 1UL
London






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Re: [ccp4bb] powdery residue on pucks?

[Steiner, Roberto]

Fully agree with what others have said. When ’the dust’ happened to us we had 
to replace that particular shipping dewar as T was not holding for very long.

Best wishes
Roberto

On 22 Feb 2020, at 00:33, Emilia C. Arturo (Emily) 
mailto:ecgart...@gmail.com>> wrote:

Hi All,

We have been noticing lately that our crystal pucks return from different 
beamlines coated with the same powdery material. For the record, we typically 
undo our pucks, clean the assemblies and dry out the pucks within a day of 
receiving the shipping dewar, but notice the same thing regardless of how long 
between receiving the dewar and disassembling the pucks. Have any of you 
experienced this sort of thing, or have suggestions of what might be the cause 
and/or the powdery material?

Regards,
Emily.

--
"Study as if you were going to live forever; live as if you were going to die 
tomorrow." - Maria Mitchell

"I'm not afraid of storms for I'm learning to sail my ship."  - Louisa May 
Alcott




To unsubscribe from the CCP4BB list, click the following link:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB=1

Professor Roberto Steiner
Randall Centre for Cell and Molecular Biophysics
Faculty of Life Sciences and Medicine
King's College London

roberto.stei...@kcl.ac.uk
Phone 0044 20 78488216
Fax0044 20 78486435

Room 3.10A
New Hunt's House
Guy's Campus
SE1 1UL
London






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Re: [ccp4bb] powdery residue on pucks?

[Jan Abendroth]

We call this 'synchrotron dust', but our suspicion is the same that is is a
breakdown product of the foam.  It happens more often with old dewars than
with newer ones. Once this happens, it is a good time to test the dewars.

Cheers,
Jan

On Fri, Feb 21, 2020 at 4:40 PM Diana Tomchick <
diana.tomch...@utsouthwestern.edu> wrote:

> I believe my technician decided that it was due to the breakdown of the
> adsorbent foam in our oldish shipping dewar, as it stopped happening once
> we replaced that particular dewar.
>
> But I would be open to other explanations.
>
> Diana
>
> **
> Diana R. Tomchick
> Professor
> Departments of Biophysics and Biochemistry
> UT Southwestern Medical Center
> 5323 Harry Hines Blvd.
> Rm. ND10.214A
> Dallas, TX 75390-8816
> diana.tomch...@utsouthwestern.edu
> (214) 645-6383 (phone)
> (214) 645-6353 (fax)
>
> On Feb 21, 2020, at 6:33 PM, Emilia C. Arturo (Emily) 
> wrote:
>
>
> EXTERNAL MAIL
>
> Hi All,
>
> We have been noticing lately that our crystal pucks return from different
> beamlines coated with the same powdery material. For the record, we
> typically undo our pucks, clean the assemblies and dry out the
> pucks within a day of receiving the shipping dewar, but notice the same
> thing regardless of how long between receiving the dewar and disassembling
> the pucks. Have any of you experienced this sort of thing, or have
> suggestions of what might be the cause and/or the powdery material?
>
> Regards,
> Emily.
>
> --
> "Study as if you were going to live forever; live as if you were going to
> die tomorrow." - Maria Mitchell
>
> "I'm not afraid of storms for I'm learning to sail my ship."  - Louisa May
> Alcott
>
>
> --
>
> To unsubscribe from the CCP4BB list, click the following link:
> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB=1
>
> CAUTION: This email originated from outside UTSW. Please be cautious of
> links or attachments, and validate the sender's email address before
> replying.
>
>
>
> --
>
> UT Southwestern
>
> Medical Center
>
> The future of medicine, today.
>
> --
>
> To unsubscribe from the CCP4BB list, click the following link:
> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB=1
>


-- 
Jan Abendroth
UCB BioSciences
Seattle / Bainbridge Island, WA, USA
home: jan.abendr...@gmail.com
work: jan.abendr...@ucb.com



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Re: [ccp4bb] powdery residue on pucks?

[Boniecki, Michal]

I have noticed it with new pucks (most likely some kind  of grease from 
manufacturing) and later on when used in dry shipping dewars that has old 
absorbent coating. Also it might be that your dewar is not holding vacuum very 
well. Usually it can be cleaned with compressed air but have decided to change 
dewar anyway and problem disappeared.


Michal

On Feb 21, 2020, at 18:40, Diana Tomchick  
wrote:


CAUTION: This email originated from outside of the University of Saskatchewan. 
Do not click links or open attachments unless you recognize the sender and know 
the content is safe. If in doubt, please forward suspicious emails to 
phish...@usask.ca

I believe my technician decided that it was due to the breakdown of the 
adsorbent foam in our oldish shipping dewar, as it stopped happening once we 
replaced that particular dewar.

But I would be open to other explanations.

Diana

**
Diana R. Tomchick
Professor
Departments of Biophysics and Biochemistry
UT Southwestern Medical Center
5323 Harry Hines Blvd.
Rm. ND10.214A
Dallas, TX 75390-8816
diana.tomch...@utsouthwestern.edu
(214) 645-6383 (phone)
(214) 645-6353 (fax)

On Feb 21, 2020, at 6:33 PM, Emilia C. Arturo (Emily) 
mailto:ecgart...@gmail.com>> wrote:


EXTERNAL MAIL

Hi All,

We have been noticing lately that our crystal pucks return from different 
beamlines coated with the same powdery material. For the record, we typically 
undo our pucks, clean the assemblies and dry out the pucks within a day of 
receiving the shipping dewar, but notice the same thing regardless of how long 
between receiving the dewar and disassembling the pucks. Have any of you 
experienced this sort of thing, or have suggestions of what might be the cause 
and/or the powdery material?

Regards,
Emily.

--
"Study as if you were going to live forever; live as if you were going to die 
tomorrow." - Maria Mitchell

"I'm not afraid of storms for I'm learning to sail my ship."  - Louisa May 
Alcott




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or attachments, and validate the sender's email address before replying.





UT Southwestern

Medical Center

The future of medicine, today.



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Re: [ccp4bb] powdery residue on pucks?

[Diana Tomchick]

I believe my technician decided that it was due to the breakdown of the 
adsorbent foam in our oldish shipping dewar, as it stopped happening once we 
replaced that particular dewar.

But I would be open to other explanations.

Diana

**
Diana R. Tomchick
Professor
Departments of Biophysics and Biochemistry
UT Southwestern Medical Center
5323 Harry Hines Blvd.
Rm. ND10.214A
Dallas, TX 75390-8816
diana.tomch...@utsouthwestern.edu
(214) 645-6383 (phone)
(214) 645-6353 (fax)

On Feb 21, 2020, at 6:33 PM, Emilia C. Arturo (Emily) 
mailto:ecgart...@gmail.com>> wrote:


EXTERNAL MAIL

Hi All,

We have been noticing lately that our crystal pucks return from different 
beamlines coated with the same powdery material. For the record, we typically 
undo our pucks, clean the assemblies and dry out the pucks within a day of 
receiving the shipping dewar, but notice the same thing regardless of how long 
between receiving the dewar and disassembling the pucks. Have any of you 
experienced this sort of thing, or have suggestions of what might be the cause 
and/or the powdery material?

Regards,
Emily.

--
"Study as if you were going to live forever; live as if you were going to die 
tomorrow." - Maria Mitchell

"I'm not afraid of storms for I'm learning to sail my ship."  - Louisa May 
Alcott




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https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB=1

CAUTION: This email originated from outside UTSW. Please be cautious of links 
or attachments, and validate the sender's email address before replying.





UT Southwestern


Medical Center



The future of medicine, today.




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