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Ch. 9 - Controlling Microbial Growth in the Environment
Chapter 9, Problem 9.8a

Which of the following items functions most like an autoclave?


a. boiling pan
b. incinerator
c. microwave oven
d. pressure cooker

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Understand the function of an autoclave: An autoclave uses steam under pressure to sterilize equipment and other objects, effectively killing bacteria, viruses, fungi, and spores.
Compare each option to the function of an autoclave: A boiling pan uses heat but not pressure, an incinerator uses high heat to burn materials, a microwave oven uses microwave radiation, and a pressure cooker uses steam under pressure.
Identify the key similarity: The pressure cooker, like an autoclave, uses steam under pressure to achieve its function.
Consider the effectiveness: While a pressure cooker is not designed for sterilization, it operates on a similar principle of using steam and pressure.
Conclude which item functions most like an autoclave based on the mechanism of action.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Autoclave Functionality

An autoclave is a device that uses steam under pressure to sterilize equipment and materials. It operates at high temperatures, typically around 121°C, which effectively kills bacteria, viruses, and spores. Understanding how an autoclave works is crucial for comparing it to other sterilization methods.
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Pressure and Temperature Relationship

The relationship between pressure and temperature is fundamental in sterilization processes. Increasing pressure raises the boiling point of water, allowing steam to reach higher temperatures, which enhances the effectiveness of sterilization. This principle is key to understanding how devices like pressure cookers can mimic autoclave functions.
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Sterilization Methods

Sterilization methods vary in their effectiveness and mechanisms. Common methods include moist heat (like autoclaving), dry heat, chemical sterilization, and radiation. Recognizing the differences between these methods helps in identifying which items can function similarly to an autoclave in achieving sterilization.
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