CHAPTER 9 PART 2

Question 1

what are the 4 methods of using moist heat

Answer 1

boiling, autoclaving, pasteurization, and ultra-high-temp sterilization

Question 2

define boiling

Answer 2

kills vegetative cells of bacteria and fungi, protozoan trophozoites, and most viruses

Question 3

define autoclaving

Answer 3

pressure applied to boiling water prevents steam from escaping

Question 4

ultra-high-temp sterilization

Answer 4

140 degrees C for 1-3 seconds, then rapid cooling

Question 5

dry heat is used for

Answer 5

materials that cannot be sterilized with moist heat

Question 6

dry heat denatures proteins and

Answer 6

oxidizes metabolic and structural chemicals

Question 7

what is more effective, slow freezing or quick freezing

Answer 7

slow freezing

Question 8

what is desiccation

Answer 8

drying

Question 9

desiccation inhibits what

Answer 9

growth due to removal of water

Question 10

what is filtration

Answer 10

the passage of air or a liquid through a material that traps and removes microbes

Question 11

what are the four ways to evaluate disinfectants and antiseptics

Answer 11

phenol coefficient, use-dilation test, kelsey-sykes capacity test, and in-use test