Hurdle Technology Quiz: Food Preservation Hurdle Quiz

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Questions and Answers

What is the definition of hurdle technology?

The removal of all microorganisms from preserved food
The combination of preservation techniques to establish hurdles that microorganisms cannot overcome (correct)
The use of single preservation methods to establish a series of preservation factors
The application of extreme heat treatment to preserve food

Which method requires extremes to be effective as a single preservation method?

High concentration of chemical preservatives (correct)
Freezing
Dehydration
Direct/Indirect Acidification

Which hurdle is categorized as a physicochemical preservation hurdle?

Packaging film
UV irradiation (correct)
High temperature
HHP (High Hydrostatic Pressure)

Which preservation hurdle is microbially derived?

Lactic acid (C) Signup and view all the answers

Which method is not categorized as a potential preservation hurdle?

Frying (A) Signup and view all the answers

Which factor is considered as a physical preservation hurdle?

O3 (ozone) (B) Signup and view all the answers

What are some examples of hurdles in preservation technology?

Monolaurin, increased pH, and reduced aw (C) Signup and view all the answers

What is the most important factor for high- and intermediate-moisture foods in hurdle technology?

Intrinsic properties (C) Signup and view all the answers

In which practical example is adequate control of Listeria monocytogenes achieved?

Lowering the pH to 5.5 (C) Signup and view all the answers

What does the interaction of hurdles in preservation technology consider?

Heat resistance decreases at low pH (B) Signup and view all the answers

In Hurdle Technology, what is the storage life for shelf-stable products (SSP)?

Weeks to months (A) Signup and view all the answers

What is the heat treatment duration for liver, blood, and Bologna-style sausages in SSP?

20-40 minutes at 103-108 °C (A) Signup and view all the answers

What does traditional Italian SSP have an aw of?

~0.96-0.97 (A) Signup and view all the answers

What does high moisture meats (aw > 0.90) refer to in Hurdle Technology?

~weeks to months unrefrigerated shelf-life (A) Signup and view all the answers

In hurdle technology, which of the following is considered a physicochemical preservation hurdle?

Salt addition (A) Signup and view all the answers

What preservation method requires extremes to be effective as a single preservation method in hurdle technology?

High concentration of chemical preservatives (D) Signup and view all the answers

Which of the following is NOT considered a potential physical preservation hurdle in hurdle technology?

Water activity (B) Signup and view all the answers

What is the deliberate combination of existing and novel preservation techniques in order to establish a series of hurdles that microorganisms should not be able to overcome?

Food hurdle technology (B) Signup and view all the answers

Which of the following is a microbially derived potential preservation hurdle in hurdle technology?

Lactic acid (C) Signup and view all the answers

In the context of preservation hurdles, what is the main disadvantage of using hurdle technology?

Potential negative impact on consumer acceptance (A) Signup and view all the answers

What is the most important consideration for achieving adequate control of Listeria monocytogenes in a chilled product using hurdle technology?

Combining pH, salt content, and storage temperature (D) Signup and view all the answers

Which characteristic is essential for applying hurdle technology to high- and intermediate-moisture foods?

Multi-target effect and synergistic interaction (D) Signup and view all the answers

What combination of factors could be used to achieve adequate control of Listeria monocytogenes in a chilled product through hurdle technology?

pH 5.5, 5% NaCl, and storage at 4 °C (A) Signup and view all the answers

What is the primary purpose of achieving a low Eh in addition to other hurdles in shelf-stable products (SSP)?

Inactivating vegetative cells and damaging spores (C) Signup and view all the answers

Flashcards

Hurdle Technology

Combining preservation techniques to create barriers microorganisms can't overcome.

High Concentration Preservatives

Effective only at very high levels when used alone.