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Food is preserved by producing a shock wave that inactivates micro-organisms. What is this method of preservation called?

Food is preserved by producing a shock wave that inactivates micro-organisms. What is this method of preservation called? Correct Answer Pulsed Electric Field

The correct answer is: 'D'.

Key Points

  • Pulsed electric field (PEF) is a non-thermal method of food preservation that uses brief pulses of electricity or electric field for microbial inactivation.  
  • PEF causes minimal effects on food quality attributes like sensory and physical properties.
  • PEF offers high-quality foods and is effective than heat treatments as it maintains the original colour, flavour, nutritional value, and texture.

 Thus, the correct answer is: "Pulsed electric field".

Additional Information

  • Vacuum packaging is the process of removing air from a package before sealing it.
  • Sensitive products, such as food, are packed in a modified atmosphere by using a packing gas. The gas utilised is usually inert or has properties that safeguard the packaged items' integrity by preventing undesirable chemical reactions like food deterioration or oxidation.

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