visit any bakery or milk chilling center near to your school with the help of your teacher parents. learn about some techniques to culture and usage of some microorganisms and prepare a note on them.
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Answer:
Usually fermentation is performed for this purpose.
Explanation:
In fermentation milk is heated at 140 degree centi grade for few seconds & then cooled very quickly to kill microorganisms which makes easy to preserve milk for long time. Whole process is performed in few seconds.
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