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Physical and Chemical Agents

Physical and Chemical Agents
The organisms retained in the fluids filtered by Seitz filter is

Clostridium
Proteus
Staphylococcus
None of these

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Physical and Chemical Agents
The time in minutes at a specific temperature needed to kill a population of cells is the

thermal death point
thermal death temperature
decimal reduction time
F value

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Physical and Chemical Agents
For sterilization of which material gamma rays can be used?

None of these
Canulas
Plastic syringes
Catheters

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Physical and Chemical Agents
Milk is pasteurized in batch method by keeping it at

63°C for 30 minutes
72°C for 6 minutes
73°C for 30 minutes
72°C for 60 seconds

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Physical and Chemical Agents
Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have

insufficient nutrients
low pH
toxic alkaline chemicals
high concentration of solutes

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Physical and Chemical Agents
Which of the following does not kill endospores?

Hot air sterilization
Autoclave
Incineration
Pasteurization

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