Unit 3 Control Of Microbial Growth Flashcards
This varies the composition of lipids in a membrane, which in turn dictates at what temperature an organism can grow.
Membrane fluidity
Produces a series of protective proteins in organisms exposed to temperature near the upper edge of their growth range.
The heat shock response
A measure of how much water in a solution is available for a microbe to use.
Water activity
A measure of the number of solute molecules in a solution and is inversely related to aw-.
Osmolarity
This occurs when placing a given species under pH conditions that slow its growth.
Acid and alkaline stress responses
This means to kill all living organisms.
Sterilization
This means to kill pathogens on inanimate(lifeless) objects.
Disinfection
The removal of potential pathogens from the surfaces of living tissues.
Antisepsis
The time it takes an antimicrobial treatment to reduce the number of organisms to 10% of the original value.
The D-value
This uses high pressure to achieve temperatures that will sterilize objects.
The autoclave
A measure of how much more heat is needed to reduce D-value to 1/10 its original value.
The z-value
The process of exposing foods to gamma rays, x-rays to kill pathogens without harming the food itself.
Irradiation
Compounds produced by one living microorganism that kill other microorganisms.
Antibiotics
The use of one microbe to control the growth of another.
Biocontrol
These contain certain microbes that, when ingested, aim to restore microbial balance to intestinal flora.
Probiotics
