Preparing tissues for microscopic examination

Properly conditioning tissue samples for examination under a microscope usually entails their prior drying. This can be done by freeze-drying, provided the tissue preserves its structure throughout the process. 

Preparing sampies as an intermediate step in (bio)chemicai analytical procedures 

Some types of chemical analysis require that the sample be in dry powder form, either because of restrictions imposed by the analytical system to be used or in order to concentrate the sample and boost the sensitivity of the analytical method applied. The necessary condition for freeze-drying to be applicable with this purpose is that it should not alter the sample composition, which will depend exclusively on the particular freeze-drying conditions used. 

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