9-2 Physical Control Flashcards Preview

BIO 119-352 > 9-2 Physical Control > Flashcards

Flashcards in 9-2 Physical Control Deck (14):
1

To sterilize glassware, metals, powders, oils.

Ovens 171-340F for 1hr

2

To sterilize bone & skin tissue, heart valves for grafting, U.S. mail, and poultry.

Ionizing radiation (cathode ray, gamma ray, and x ray)

3

To sterilize metals, glass, syringes, dressings, animal carcasses.

Inceneration >1000c

4

To preserve microbes by dehydrating & freezing to prevent damaging ice crystals.

Desiccation (dehydrating) and lypohilization (freezing)

5

To preserve food by adding sugar or salt to dehydrate

osmotic pressure

6

To sterilize using steam with pressure for heat & moisture resistant materials and media.

Autoclave steam and pressure 121c 15psi

7

To disinfect or sterilize an operating room in a hospital.

Nonionizing radiation (UV 260 nm)

8

A bacteriostatic method that slows metabolism; used for food and milk

dehydration

9

To sterilize milk using 140C for 3” so can store at room temperature indefinitely

Ultra-high temperature sterilization

10

To disinfect drinking water, baby materials, food, utensils.

Boiling water 100c

11

To sterilize heat sensitive liquids like serum vaccines, enzymes, and media.

Membrane Filtration

12

To preserve food using dehydration.

Osmotic pressure

13

A bacteriostatic method for food preservation that solidifies available water.

Refrigeration cold (o-7c)

14

To disinfect fresh beverages.

Pasteurization (batch 63c 30’ then chill; flash 72c 15’ then chill; ultrahigh temp 135c 1’ then chill)