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refers to the use of a physical process or a chemical agent (a disinfectant) to destroy vegetative pathogens but not bacterial endospores
any practice that prevents the entry of infectious agents into sterile tissues and thus prevents infection
chemical agents are applied directly to exposed body surfaces, wounds, and surgical incisions to destroy or inhibit vegetative pathogens
any cleansing technique that mechanically removes microorganisms as well as other debris to reduce contamination to safe levels
thermal death time
the shortest length of tie required to kill all test microbes at a specified temperature
fractional sterilization designed to destroy spores indirectly. A preparation is exposed to slowing stream for an hour, and then the mineral is allowed to incubate to permit spore germination. the resultant vegetative cells are destroyed by repeated steaming and incubation
a technique in which heat is applied to liquids ti kill potential agents of infection and spoilage, while at the same time retaining the liquid's flavor and food value
destruction of microbes by subjecting them to extremes of dry heat. Microbes are reduced to ashes and gas by this process
a method of preserving microoganisms and other cells in a viable state for many years
energy emitted from atomic activities and dispersed at high velocity through matter or space
excites atoms by raining them to a higher energy state, but it does not ionize them
cold (or low-temperature) sterilization
the use of nonheating methods such as radiation or filtration to sterilize materials
ultraviolet radiation (UV)
radiation with an effective wavelength from 240 nm to 260 nm. UV radiation induces mutations readily but has very poor penetrating power
the union of two adjacent pyrimides on the same DNA strand, brought about by exposure to UV light. It is a form of mutation
a word the pertains to a family of surfactants called quaternary ammonium compounds. These detergents are only weakly microbicidal and are used as sanitizers and preservatives
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