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Questions and Answers
What does the D-value represent in food preservation?
How does refrigeration (2-8ËšC) affect microbial growth?
What is the primary effect of freezing (-18°C) on microbial growth?
How does dehydration inhibit microbial growth?
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What does Modified Atmosphere Packaging (MAP) do to preserve food freshness?
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What is the primary purpose of membrane filtration in food preservation?
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How do acid addition, salt curing, and sugar preservation inhibit microbial growth?
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What is the primary function of antimicrobial food additives?
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How does fermentation by lactic acid bacteria inhibit microbial growth?
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What does the Thermal Death Time (TDT) curve show the relationship between?
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What does the D-value represent in food preservation?
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How does refrigeration (2-8ËšC) affect microbial growth?
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What is the primary purpose of membrane filtration in food preservation?
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How does dehydration inhibit microbial growth?
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What does Modified Atmosphere Packaging (MAP) do to preserve food freshness?
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What is the primary function of antimicrobial food additives?
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How does fermentation by lactic acid bacteria inhibit microbial growth?
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What is the primary effect of freezing (-18°C) on microbial growth?
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What does the Thermal Death Time (TDT) curve show the relationship between?
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How does acid addition, salt curing, and sugar preservation inhibit microbial growth?
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Study Notes
Food Preservation and Microbial Control
- Thermal Death Time (TDT) curve shows the relationship between temperature and time needed to kill microorganisms.
- D-value is the time required to kill 90% of microbial population and varies with temperature.
- F-value represents the time needed at a specific temperature to achieve desired sterility level.
- Refrigeration (2-8˚C) slows microbial growth, while freezing (-18°C) stops it by water unavailability.
- Dehydration through conventional or freeze-drying inhibits microbial growth by reducing water activity.
- Modified atmosphere packaging (MAP) alters the gaseous environment to preserve food freshness.
- Various forms of radiation (α, β, γ, X-ray) destroy microorganisms and inhibit biochemical changes.
- Membrane filtration removes solids and microorganisms from liquid foods.
- Acid addition, salt curing, and sugar preservation inhibit microbial growth through different mechanisms.
- Antimicrobial food additives are controversial chemical compounds that inhibit microorganism growth.
- Fermentation by lactic acid bacteria lowers pH and produces bacteriocins to inhibit microbial growth.
- Self-check exercises include questions on food preservation purposes, principles, pasteurization, sterilization, and microbial D-values.
Food Preservation and Microbial Control
- Thermal Death Time (TDT) curve shows the relationship between temperature and time needed to kill microorganisms.
- D-value is the time required to kill 90% of microbial population and varies with temperature.
- F-value represents the time needed at a specific temperature to achieve desired sterility level.
- Refrigeration (2-8˚C) slows microbial growth, while freezing (-18°C) stops it by water unavailability.
- Dehydration through conventional or freeze-drying inhibits microbial growth by reducing water activity.
- Modified atmosphere packaging (MAP) alters the gaseous environment to preserve food freshness.
- Various forms of radiation (α, β, γ, X-ray) destroy microorganisms and inhibit biochemical changes.
- Membrane filtration removes solids and microorganisms from liquid foods.
- Acid addition, salt curing, and sugar preservation inhibit microbial growth through different mechanisms.
- Antimicrobial food additives are controversial chemical compounds that inhibit microorganism growth.
- Fermentation by lactic acid bacteria lowers pH and produces bacteriocins to inhibit microbial growth.
- Self-check exercises include questions on food preservation purposes, principles, pasteurization, sterilization, and microbial D-values.
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Description
Test your knowledge of food preservation and microbial control with this quiz. Explore topics such as thermal death time, refrigeration, dehydration, modified atmosphere packaging, radiation, membrane filtration, and fermentation. Sharpen your understanding of food preservation principles and techniques.
