BIOL240 Lecture Notes - Lecture 11: Pasteurization, Antibiotics, Antiseptic
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Microbiology Notes: Week 11: Controlling
Microbial Growth
Definitions:
Lecture Notes:
- Overview and heat sterilization:
oHow to control microbial growth?
A large part of microbio involves preventing microbial growth in food,
industry processes and healthcare environments, water systems,
oDifferent strategies to control microbial growth:
Heat sterilization, radiation, removal by filter sterilization, chemical control,
oHeat Sterilization:
Decimal reduction time: time it takes to reduce the population by 1 log or 10x
at a particular temperature.
Often use an apparatus used an Autoclave:
Chamber that allows the entrance of steam under pressure,
As the steam flows into the autoclave, the pressure increases allowing
temperatures of more than 100 celsius
Typically, temperatures of about 121 are used to ensure the
desiccation of spores.
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