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freeze-drying
(redirected from freeze-dry)

   Also found in: Dictionary/thesaurus, Medical 0.48 sec.

freeze-drying

Method of preserving food (see food technology) or other perishable materials. The product to be dried is frozen and then put in a vacuum chamber that forces out the ice as water vapour, a process known as sublimation. The most widely-known freeze-dried product is instant coffee.

Many of the substances that give products such as coffee their typical flavour are volatile, and would be lost in a normal drying process because they would evaporate along with the water. In the freeze-drying process these volatile compounds do not pass into the ice that is to be sublimed, and are therefore largely retained.


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To efficiently freeze-dry large quantities of plasma, the individual units were poured into a large pool often containing the plasma from more than a thousand donors.
The group is hopeful of the commercialization of the platino-alumina agent as it uses inexpensive aluminum hydroxide as a raw material and is produced in a cost-efficient and simple freeze-dry process.
However, the processing center will also feature capacity to dehydrate and freeze-dry which will produce Internet-marketable products," Lee says.
 
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