Transcript 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
• 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