Page 28 - Genius Kidz Prudence Learning Sc-8

So, we target a broader range and some Sterilization : It is process of heating the food

of the microbes are always left behind. material at a very high pressure so as to make it
They may cause food spoilage when free of microbes and their spores.
the temperature is lowered down to
the normal.

Methods used for increasing temperature
include :

Pasteurization : It is a process in which the
food material is heated to a very high Sterilization
temperature. Followed by its cooling down (d) Addition of preservatives : Preservative

after a particular predefined time duration. is any substance which is added to an
Pasteurized milk packets are often heard of by edible substance so as to prevent its
all of us. microbial decomposition. Preservatives
can be of two types :

• Natural preservatives : Those
preservatives that are present in nature
are called natural preservatives, e.g., oil,

vinegar, lemon juice, etc.
• Synthetic preservatives : Those

preservatives that are synthesized
artificially are called synthetic
preservatives, e.g., citric acid, sodium
Pasteurization
benzoate, etc.

One out of every 2000 babies is born with a tooth.

! Organisms that can't be visualized by naked eye are called microbes. Study of microbes is called
microbiolology.

! Microbes are of 5 types–bacteria, fungi, protozoa, algae and viruses
! Bacteria are unicellular prokaryotes.
! Viruses are the smallest organisms and form a link between living and non-living organisms.

! Fungi are eukaryotic organisms with several different shapes. Study of fungi is called mycology.
! Protozoans are primitive organisms. They may be parasitic or free floating.
! Algae are “sea weeds”. Algae are plant like organisms.

! Food preservation is a process of food treatment so as to slow down food spoilage by microbes.

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