This is satisfactory for the sterilization of smooth surface materials In operating rooms, U.V lamps are also used to suppress surface – growing of molds and other organisms in meat packing, houses, bakeries storage, ware houses and laboratories.
X rays are used for medical, experimental work and the production of mutants of microorganisms for genetic studies.
Neutrons are very effective in killing microorganism but are expensive and hard to control.
Alpha rays are effective bactericides .(135)
Gamma rays is used in commercial manufacture for disposable instruments, needles, and disposable rubber gloves, and it can be used for closed packs .(136)