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 <00002497b6493202-dmarc-requ...@jiscmail.ac.uk<mailto:00002497b6493202-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) <ecgart...@gmail.com<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&A=1<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.jiscmail.ac.uk%2Fcgi-bin%2Fwebadmin%3FSUBED1%3DCCP4BB%26A%3D1&data=01%7C01%7Croberto.steiner%40KCL.AC.UK%7Cad9bd665323e4e5bc9ef08d7b72ee9c6%7C8370cf1416f34c16b83c724071654356%7C0&sdata=pJE3UI0d07ZW4cvlyRsNZxO7sy7a610edsZEhGEN1yQ%3D&reserved=0> 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<mailto:roberto.stei...@kcl.ac.uk> Phone 0044 20 78488216 Fax 0044 20 78486435 Room 3.10A New Hunt's House Guy's Campus SE1 1UL London ________________________________ To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
