The Effects of Cold and Desiccation slows growth of cultures and microbes in food, does not kill most microbes; freezing can actually preserve cultures- two types: Desiccation, Lyophilization ??? ??? ??? Desiccation dehydration of vegetative cells when directly exposed to normal room air ??? ??? ??? Lyophilization a combination of freezing and drying; used to preserve microorganisms and other cell