ABSTRACT
As discussed throughout this text, freeze-drying, or lyophilization, IS the most effective for the of sensitive nl·,.,rl·lwj·~
and food. the nn~Vl,()u:slv frozen specimens allows
and careful of materials which. most often, be stored and distributed at ambient
natural extracts from
a
cannot blood dpli'1\r"ti,JP< animal the many
However. dramatic advancements 1Il biochemistry and englnei~fIJ:1g, as well as the interest in natural active su!Jst,lnc:es, has into the Most of these materials are fairly unstable in solution at elevated temperatures, are difficult to and need to be sterile if they are tobe used for human parerlteral
have to be under strict from outside contamination. as
is the case for antimitotic used in cancer some of them are toxic and should not be released into the environment.
