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Re: Draft definition for _diffrn_measurement.specimen_adhesive

  • To: James Hester <james.r.hester@gmail.com>, Distribution list of the IUCr COMCIFS Core Dictionary Maintenance Group<coredmg@iucr.org>
  • Subject: Re: Draft definition for _diffrn_measurement.specimen_adhesive
  • From: Peter Murray-Rust via coreDMG <coredmg@iucr.org>
  • Date: Tue, 23 Jun 2020 13:36:44 +0100
  • Cc: Peter Murray-Rust <pm286@cam.ac.uk>
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On Tue, Jun 23, 2020 at 7:10 AM James Hester via coreDMG <coredmg@iucr.org> wrote:
Dear Core DMG,

Please see the following proposed new definition for describing the adhesive used to attach a single crystal specimen to a capillary or other sample holder attached to a goniometer head. I have provided one definition that selects from an enumerated list, useful for machine processing, and another that allows free-form text so that brand names and other details can be included.  If you know of any methods of adhesion that are not covered in the following list, please contribute them, and if I have suggested anything that is not used in practice, please let me know.

====
save_diffrn_measurement.specimen_adhesive_type
_definition.id     '_diffrn_measurement.specimen_adhesive_type'
_description.text
;
The type of the adhesive material used to attach the sample to a sample holder.
;
loop_
_enumerated_set.case
_enumerated_set.detail
Epoxy            "An epoxy glue"
Oil                  "A viscous oil"
Frozen_Liquid  "A frozen liquid, not water or oil"
Magnet          "Sample is held in place by magnetic field"
Clay               "Modelling clay"
.                     "No adhesive used"
Ice                 "The specimen is frozen in place using water ice"

save_

save_diffrn_measurement.specimen_adhesive_details
_definition.id     '_diffrn_measurement.specimen_adhesive_details'
_description.text
;
A description of the method of attachment of the sample to the sample holder. The general method of attachment
should be described using _diffrn_measurement.specimen_adhesive_type
;
loop_
_description_example.case
"UHU Super Glue ultrafast gel"
"Flourinert"
"Plasticine"
"Sample was held tightly by a custom aluminium wire framework attached to the sample holder"

save_
====
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Peter Murray-Rust
Reader Emeritus in Molecular Informatics
Unilever Centre, Dept. Of Chemistry
University of Cambridge
CB2 1EW, UK
+44-1223-763069
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