Materials which are not themselves storage-stable at room temperature are
made suitable for storage by mixing them with a carrier substance and
spray drying the resulting mixture so as to form particles containing both
the material and the carrier substance in which the carrier substance is
in an amorphous, i.e. glassy or rubbery, state. Formation of such a
composition greatly enhances stability. The material stored may be a
biological material such as an enzyme, the components of a chemical
reaction such as reagents for carrying out an assay, or even viable
biological cells.
