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How can campers effectively treat stream water to remove pathogenic protozoa, bacteria, and viruses?
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11. Controlling Microbial Growth
Physical Methods to Control Microbial Growth
객관식
Which of the following is a commonly used physical method for sterilization?
A
Refrigeration
B
Dry heat (hot air oven)
C
Filtration
D
Autoclaving (steam under pressure)
검증된 단계별 안내1
Understand that sterilization refers to the complete elimination or destruction of all forms of microbial life, including spores.
Identify that physical methods of sterilization use physical agents such as heat, pressure, or filtration to achieve sterilization.
Recognize that refrigeration is not a sterilization method but rather a preservation technique that slows microbial growth.
Know that dry heat sterilization (e.g., hot air oven) uses high temperatures for a prolonged time to sterilize materials by oxidizing cell components.
Understand that autoclaving uses steam under pressure to achieve sterilization by denaturing proteins and is a widely used physical sterilization method; filtration physically removes microbes from liquids or air but does not kill them.
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