Unit 3 Control Of Microbial Growth Flashcards

1
Q

This varies the composition of lipids in a membrane, which in turn dictates at what temperature an organism can grow.

A

Membrane fluidity

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2
Q

Produces a series of protective proteins in organisms exposed to temperature near the upper edge of their growth range.

A

The heat shock response

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3
Q

A measure of how much water in a solution is available for a microbe to use.

A

Water activity

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4
Q

A measure of the number of solute molecules in a solution and is inversely related to aw-.

A

Osmolarity

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5
Q

This occurs when placing a given species under pH conditions that slow its growth.

A

Acid and alkaline stress responses

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6
Q

This means to kill all living organisms.

A

Sterilization

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7
Q

This means to kill pathogens on inanimate(lifeless) objects.

A

Disinfection

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8
Q

The removal of potential pathogens from the surfaces of living tissues.

A

Antisepsis

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9
Q

The time it takes an antimicrobial treatment to reduce the number of organisms to 10% of the original value.

A

The D-value

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10
Q

This uses high pressure to achieve temperatures that will sterilize objects.

A

The autoclave

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11
Q

A measure of how much more heat is needed to reduce D-value to 1/10 its original value.

A

The z-value

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12
Q

The process of exposing foods to gamma rays, x-rays to kill pathogens without harming the food itself.

A

Irradiation

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13
Q

Compounds produced by one living microorganism that kill other microorganisms.

A

Antibiotics

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14
Q

The use of one microbe to control the growth of another.

A

Biocontrol

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15
Q

These contain certain microbes that, when ingested, aim to restore microbial balance to intestinal flora.

A

Probiotics

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16
Q

Offers a possible alternative to antibiotics in the face of rising antibiotic resistance.

A

Phage therapy