Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] freezing in ethane / propane - unipucks ?

2022-01-26 Thread Ginell, Stephan L.
Hi , 1) If you are collecting the data at the APS the samples frozen in propane can be legally shipped there (check APS web site for information) 2) The samples CANNOT be mounted using either the ACTOR or ALS Style auto mounter. But the samples can be shipped using either the Rigaku pucks or

Re: [ccp4bb] Tiny rocks on my CX100 shipping dewar

2020-12-06 Thread Ginell, Stephan L.
I agree with Nukri Sent from my iPhone On Dec 4, 2020, at 10:42 AM, Nukri Sanishvili wrote:  Hi John, I think I know what might have happened: Many of the MX beamlines at the APS use some sort of filler in the containers where the LN2 is dumped. If I remember correctly, one of the beamlines

Re: [ccp4bb] Tiny rocks on my CX100 shipping dewar

2020-12-06 Thread Ginell, Stephan L.
Hi Jack, I have never seen “dewar rocks“ before. It does not look like the internal absorbent which is whiteish. Any inside the dewar? Does it still stay cold? Looks like rocks from a gravel walkway. Steve Sent from my iPhone On Dec 4, 2020, at 10:05 AM, Tanner, John J. wrote:  When we

Re: [ccp4bb] dewar horror stories

2020-06-25 Thread Ginell, Stephan L.
Hi Pat, So sad to hear! I have seen such failures on the CX100 shipping dewars. Generally failure occurs close to the neck of the dewar and is apparently probably caused by a hard side or angular impact cracking a weld or the shell. Most the failures I have seen have been When shipping in the

Re: [ccp4bb] frosted crystals during storage in pucks

2013-07-11 Thread Ginell, Stephan L.
My experience with xtals frosting in LN2 either in a dewar, while freezing, or in pucks, has been because the LN2 was contaminated with ice crystals The fog you see above your dewar when freezing xtals is frozen water vapor...it will fall and collect in the LN2 and also deposit on the xtals.