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Definitions

Random from 1st module

TermDefinition
Decimal reduction time time in which 90% of a bacterial population will be killed
Thermal death point lowest temp which all bacteria in liquid will be killed
Thermal death time minimum length for bacteria in liquid to be killed at given temp
Boiling Not reliable for sterilization
Steam under pressure (autoclave) YES sterilize
Pasteurization Not reliable for sterilization
Direct Flaming and inceration denatures, alters membranes and dehydrates
Hot-air sterilization denatures, alters membranes, dehydrates at high temperatures
Dessication involved removal of water, not reliable for sterilization
Lyophilization also called freeze drying, not reliable for sterilization
Filtration depending on pore size can be used for sterilization
ionizing short wavelength and high energy emission (ex: x-rays) HIGHLY penetrable, reliable for sterilization
nonionizing longer wavelength & lower energy emission (ex: UV light) lethal only at short wavelength to microbe, poorly penetrable
Thymidine dimers can lead to mutations during DNA replication
Use dilution test form of test to evaluate disinfectant, can check for growth
disk diffusion method form of test to evaluate disinfectant, mesure zones of inhibition
Created by: cindysaldivar
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