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Set out details of one method of freezing fresh vegetables - Leaving Cert Home Economics - Question 3(b) - 2016
Question 3(b)
Set out details of one method of freezing fresh vegetables. Refer to: - description of the method used - underlying principle involved - the effect of freezing o... show full transcript
Worked Solution & Example Answer:Set out details of one method of freezing fresh vegetables - Leaving Cert Home Economics - Question 3(b) - 2016
Step 1
Description of the method used:
Answer
One effective method for freezing fresh vegetables is Home Freezing. This involves the following steps:
- Fresh vegetables are prepared by washing and cutting them into suitable sizes.
- They are then frozen rapidly at temperatures between -25°C and -18°C.
- The vegetables are placed in moisture-proof packaging to prevent freezer burn and maintain quality.
- Foods should be spread out on a tray to allow for quick freezing before being stored.
Step 2
Underlying principle involved:
Answer
The main principle behind the freezing process is that water present in the food is converted to ice crystals. This minimizes the re-entry of pathogens and slows down enzymatic activity that causes spoilage. By quickly freezing the food, we can maintain its nutritional value, color, and flavor.
Step 3
The effect of freezing on the food:
Answer
Freezing has several effects on food:
- Quick freezing allows the formation of small ice crystals, preserving the food's texture and nutritional value.
- Slow freezing can lead to larger ice crystals that disrupt the cellular structure of the food, resulting in a loss of nutrients, color, and flavor.
- Freezer burn may occur if food is not properly packaged, leading to tough, discolored areas and a loss of quality.