Food processing: canning, drying, irradiation Flashcards Preview

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Flashcards in Food processing: canning, drying, irradiation Deck (10)
1

Buying canned food

Avoid bulging, dented or rusting cand, contents may contain food poisoning.
Read label - check contents. Fruit may be canned in syrup/fruit juice.
Fish in oil, brine (salty water), sauce.
Check expiry date.

2

Drying

Heat removes water. Prevents micro-organism growing bc cannot live w/o moisture.

3

Buying dried food

Packaging intact
Check expiry date

4

Irradiation

Energy waves passed through food. Micro-organisms killed. Food keeps for long time.
Vitamins reduced.
Controversy as manufacturers may be disguising stale food as fresh

5

Radura symbol

Shows food stuff has been irradiated.

6

Canning

Heat destroys micro-organisms. Food kept in airtight sterilised cans to prevent further contamination.

7

Frozen food - food value, appearance, flavour, texture

Food value - do not lose vit + min content

Appearance - Do not lose colour, esp if blanched nevofe

Flavour - Retained

Texture - Do not become too soft

8

Canned - food value, appearance, flavour, texture

Food value - Vitamins destroyed

Appearance - Colour lost

Flavour - Some lost

Texture - Fruit + veg become soft

9

Dried food - food value, appearance, flavour, texture

Food value - Vits destroyed

Appearance - Some colour lost, Changes shape & size of some foods eg veg + fruit

Flavour - Some losg

Texture - Changes

10

Irradiated food - Food value

Lose vitamins (reduced)