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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 • Heating kills the microorganisms and spore. 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. Adding preservative • Preservative can prevent the growth of microorganisms. • For example adding sulphur dioxide to fruit juices • Cakes 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 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 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 . 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 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 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. • Base essential factor: • .Cardiovascular Endurance • .Strength and Endurance • .Flexibility • .Body Composition • .Relaxation Health and ill • Sport is very important for our body. Because it can prevent disease. For example: • Coronary Heart disease • Osteoporosis • Other disease. Simple exercise •.Neck circle round •Function : spread neck Simple exercise • Push brace exercise • Function strengthen arm Bend knee exercise • Function: strengthen foot ,buttocks muscle