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Food preservation

Food preservation. Killing the microorganisms in food. Stopping their growth. Refrigeration (Freezing). Low temperature inactivates the microorganisms, thus slowing down the multiplication of microorganisms For example fish and meat. Heating.

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Food preservation

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  1. Food preservation • Killing the microorganisms in food. • Stopping their growth.

  2. Refrigeration (Freezing) • Low temperature inactivates the microorganisms, thus slowing down the multiplication of microorganisms • For example fish and meat

  3. Heating • Heating kills the microorganisms and spore.

  4. Canning and bottling • Bacteria are killed by heating. Sealing the can in vacuum prevents the entry of microorganism. Microorganism cannot survive in the absence of oxygen in sealed cans.

  5. Adding preservative • Preservative can prevent the growth of microorganisms. • For example adding sulphur dioxide to fruit juices • Cakes

  6. Pasteurization • 1):Pasteurization Food is heated to 72 for 15 seconds , then quickly cooled down to 10. • 2): Food is heated to 63-68 for 30 minutes ,then quickly cooled down to 10 • For example milk and alcohol

  7. Smoking • The meat or fish is hung over a charcoal fire . the smoke dries the surface and also coats the meat or fish with substance inhibiting the growth of bacteria

  8. Pickling • Food and vegetables .is salted first, the smoke dries the surface and also coats the meat or fish with substance inhibiting the growth of bacteria .

  9. Natural drying (dehydration) • It must be less than 15 C. • Use the wind or sun to make food dry. • For example mushroom ,shark’s fin

  10. Biology how to affect in sport ? • Seek health is most people to want. most easily method is carry out exercise . • Exercise can :Increase the Physical Fitness • Increase health ,decrease to fill ill

  11. Physical Fitness • Physical fitness contain safeguard physical fitness and movement physical fitness .Safeguard physical fitness is human resist pathogen ,environment ,mechanical pressure…….. . Movement physical is human exercise ability. It contain movement strength ,speed ,endurance ,action coordinate ,body equilibrium.

  12. Base essential factor: • .Cardiovascular Endurance • .Strength and Endurance • .Flexibility • .Body Composition • .Relaxation

  13. Health and ill • Sport is very important for our body. Because it can prevent disease. For example: • Coronary Heart disease • Osteoporosis • Other disease.

  14. Simple exercise • .Neck circle round • Function : spread neck

  15. Simple exercise • Push brace exercise • Function strengthen arm

  16. Bend knee exercise • Function: strengthen foot ,buttocks muscle

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