Chapter 7 MICRO

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Microbiology
Chapter 7
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1

A suffix meaning "to kill".

-cide

2

Destroying or removing all forms of microbial life

Sterilization

3

The absence of pathogen on an object or area.

Asepsis

4

The reduction of microbial populations to safe public health levels

Sanitization

5

The chemical disinfection of living tissue, such as skin or a mucous membrane.

Antisepsis

6

The removal of transient microbes from skin by mechanical cleansing or by an antiseptic.

Degerming

7

Heat sufficient only to kill endospores of the botulism bacterium.

Commercial Sterilization

8

ii The lowest temperature required to kill a liquid culture of a certain species of bacteria in 10 minutes.

Thermal death point

9

The time in minutes required to kill 90% of a bacterial population.

Decimal reduction time

10

Mild heating to destroy particular spoilage organisms or disease organisms in milk or similar products.

Pasteurization

11

A test for the effectiveness of a chemical disinfectant.

Phenol coefficient

12

The absence of water, resulting in a condition of dryness.

Desiccation

13

iii Ethylene oxide

Gaseous chemosterilizer

14

Sodium hypochlorite

Halogen

15

Copper sulfate

Heavy metal

16

Silver nitrate

Heavy metal

17

Benzalkonium chloride

Quaternary ammonium compound

18

Acid-anionic detergents

Surface-active agents

19

Sorbic acid

Organic acid

20

Benzoyl peroxide

Oxidizing agent

21

Hexachlorophene

Bisphenol

22

Isopropanol

Alcohol

23

iv An effective liquid sporicide

Peracetic acid

24

A bacteriocion classified as an antibiotic

Nisin

25

Pimaricin

Natamycin

26

A biguanide

Chlorhexidine

27

A bisphenol found in many household products

Triclosan

28

An antibiotic antifungal

Natamycin

29

v Added to chlorine to form chloramines

Ammonia

30

An antibacterial effect of ultraviolet radiation in DNA.

Thymine dimers

31

Formaldehyde in an aqueous solution

Formalin

32

An example would be iodine in an aqueous-alcohol solution

Tincture

33

For example, povidone-iodine solution

Iodophore

34

vi Chlorine in tablet form issued as a water purifier by the U.S military.

Sodium dichloroisocyanurate

35

Name of a test that determines if milk has been properly pasteurized.

Phosphatase

36

Used as an antiseptic in certain mouthwashes

Zinc chloride

37

Used in many water treatment plants as a disinfectant; produced by electrical discharges at the site

Ozone

38

1. Antifungal organica compound used in food.

2. Ingredient in antidandruff shampoo.

1. Sodium benzoate

2. Zinc pyrithione

39

Ultraviolet light is an example of _______ radiation.

nonionizing

40

Sunlight owes its biocidal activity mainly to the formation of ________ oxygen.

Singlet

41

A good example of ionizing radiation is

___________.

X-rays, gamma rays, high-energy electrons

42

Ethanol is usually used in a concentration of about ________.

70%

43

A less irritating form of formaldehyde is ___________.

glutaraldehyde

44

A compound that would only inhibit the growth of a fungus would be a fungi __________ (supply the suffix).

-stat

45

Steam ________ allows temperature above boiling to be reached.

under pressure (as in autoclave)

46

Steam under pressure is obtained in retorts, pressure cookers, and __________.

autoclaves

47

Supercritical ________ is used for decontaminating foods and medical implants.

carbon dioxide

48

Generally speaking, the group of organisms that is more resistant to osmotic pressure than bacteria is ____________.

fungi, such as molds and yeasts