These halides exist in anhydrous and hydrated forms.
Dihydrate is a columnar crystal, and it is so unstable that it easily dehydrates to anhydrous and is easily oxidized by oxygen in the air.
The decision is that anhydrous borax should be exempt from import duty.
Use of osmium vapour as a fixative should provide an initial anhydrous fixation and, therefore, reliable preservation of the state of the dry tissues.
In the present work with cucumber, dormancy breaking was observed when dry, dormant seeds (moisture content 6.9% on a dry weight basis) were treated with anhydrous ethanol.
Some fixed specimens were processed with anhydrous glycerin37, and examined under a compound microscope for species identification.
The upper ether layer was aspirated and dried with anhydrous sodium sulfate.
Major elements used in this diagram were recalculated on an anhydrous basis.
