Lyophilization: Definition
An oversimplified definition of lyophilization is that it is a means of drying,
achieved by freezing the wet substance and causing the ice to sublime directly
to vapor by exposing it to a low partial pressure of water vapor.
In practice the substance may not be completely frozen, especially if nonaqueous
solutions are present, and most lyophilization processes are completed by a period
of desorption drying.
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