Why does the food spoil?
When is food spoilt: - we keep bread or chapattis
in free air for few days’ .A fungi or sponge growth
is seen on i.e. black or white colour?
We keep any food after cooking in copper pot or
milk in free air for long time period it get spoilt
because of bacterial affection or metallic
Food Spoilage factor
Some enzymes occur in food .Food get spoilt
mainly due to the presence of microorganisms,
enzymes, insect, worm and rats.
The spoilage factor
Presence of micro organism
- Micro organism required moisture and air it
Microorganisms are commonly called microbes
Bacteria are also types of Microorganisms
Microorganisms are spread everywhere
Microorganisms are useful ones and also harmful ones
Presence of enzymes:
- Enzymes are chemical substances found in all plants
- If we keep green mango in grass its color changes
green to yellow and after it changes in black spot on it.
- This due to continue action of enzymes.
Why Food Preservation
Some time we see that small insect or worm occur in
dal or rice or in any grain .
They eat the food grains and convert it in to powder .
Such food is unfit to human.