Chemical Agents

Question 1

Chemical agents act by

Answer 1

Protein coagulation
Disruption of the cell membrane
Removal of Sulphydryl groups
Substrate competition

Question 2

Ethylene Oxide

Answer 2

Colourless ,Highly penetrating gas with a sweet ethereal smell.
Effective against all types of microorganisms including viruses and spores

Question 3

Ethylene Oxide (uses)

Answer 3

Specially used for sterilising heart-lung machines, respirators, sutures, dental equipments, books and clothing.
Also used to sterilise Glass, metal and paper surfaces ,plastics, oil, some foods and tobacco.

Question 4

Formaldehyde Gas

Answer 4

Widely employed for fumigation of operation theatres and other rooms

Question 5

Beta Propiolactone

Answer 5

Used in fumigation
For sterilisation 0.2% BPL is used
Has a rapid biocidal activity
Very effective against viruses