Arctos: Code Table Request - add preservation values for different types of 'frozen'

[ccicero]

Currently CTPART_PRESERVATION has the following values for 'frozen'

frozen
frozen, flash

Suggestion is to add values for:

frozen, -20
frozen, ultralow
frozen, LN2

(or spell out liquid nitrogen?)

This will allow us to better distinguish how parts are frozen.

Given 'High Priority' since we're actively separating parts from preservation now. It would be good to do this before the change so that new parts can choose different frozen preservation methods.

Related issue: https://github.com/ArctosDB/arctos/issues/1460

[Jegelewicz]

definitions please

[dustymc]

I like the idea.

We cannot proceed without definitions.

There should be some indication of units - is that -20K (which would be an interesting state...)?

"Ultralow" is ambiguous - could mean -40, -80, and probably some other stuff. Suggest sticking to numbers.

Maybe for LN2 as well, that's consistent and an easy way to separate liquid vs vapor.

[campmlc]

I think we can put rough numbers, but there is implicit variability in all
of these. Ultralow freezers sometimes lose cooling capacity and can't go
below -50C, but usually they are between -70 and -80C. We can't put too
much detail in here - we need a real environmental module to do that.
Really these should be three separate attributes - but we will never get
community buy in for that.
frozen, -20C: frozen in a standard freezer at -20 degrees Celsius..
frozen, ultralow: frozen in an ultralow freezer at temperatures typically
-50 to -80 degrees Celsius. Specify exact temperature outside of this range
in remarks.
frozen, nitrogen: frozen in liquid or vapor phase nitrogen at -150 to -194
degrees Celsius.

On Mon, Jun 7, 2021 at 6:59 PM dustymc @.*> wrote:

• [EXTERNAL]*

I like the idea.

We cannot proceed without definitions.

There should be some indication of units - is that -20K (which would be an
interesting state...)?

"Ultralow" is ambiguous - could mean -40, -80, and probably some other
stuff. Suggest sticking to numbers.

Maybe for LN2 as well, that's consistent and an easy way to separate
liquid vs vapor.

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[campmlc]

We should add:
frozen, dry ice: frozen on dry ice at -70 to -80 Celsius for temporary
storage/shipping.
frozen, ice: stored on ice at 0 degrees C for temporary storage/shipping.

On Mon, Jun 7, 2021 at 10:33 PM Mariel Campbell @.*>
wrote:

I think we can put rough numbers, but there is implicit variability in all
of these. Ultralow freezers sometimes lose cooling capacity and can't go
below -50C, but usually they are between -70 and -80C. We can't put too
much detail in here - we need a real environmental module to do that.
Really these should be three separate attributes - but we will never get
community buy in for that.
frozen, -20C: frozen in a standard freezer at -20 degrees Celsius..
frozen, ultralow: frozen in an ultralow freezer at temperatures typically
-50 to -80 degrees Celsius. Specify exact temperature outside of this range
in remarks.
frozen, nitrogen: frozen in liquid or vapor phase nitrogen at -150 to -194
degrees Celsius.

On Mon, Jun 7, 2021 at 6:59 PM dustymc @.*> wrote:

• [EXTERNAL]*

I like the idea.

We cannot proceed without definitions.

There should be some indication of units - is that -20K (which would be
an interesting state...)?

"Ultralow" is ambiguous - could mean -40, -80, and probably some other
stuff. Suggest sticking to numbers.

Maybe for LN2 as well, that's consistent and an easy way to separate
liquid vs vapor.

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[dustymc]

we need a real environmental module to do that.

We have one. I argued for using it instead of doing this.

[ccicero]

@dustymc please explain re: environmental module. Arctos screenshot?

[dustymc]

https://github.com/ArctosDB/arctos/issues/1119#issuecomment-298777350

[Jegelewicz]

I WISH SOMEONE would DO this consistently. It would make a great publication.

[Jegelewicz]

How about these terms?

frozen, -20: frozen in a standard freezer at -20 degrees Celsius.
frozen, -80: frozen in an ultralow freezer at temperatures typically -50 to -80 degrees Celsius.
frozen, LN2: frozen in liquid or vapor phase nitrogen at -150 to -194 degrees Celsius.
frozen, dry ice: frozen on dry ice at -70 to -80 Celsius for temporary storage/shipping.
frozen, ice: stored on ice at 0 degrees C for temporary storage/shipping.