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Lemon Penicillin Category: Science
Dated: 2011-03-14
Grow your own microbes with your lemon, water, Darkness—and patience.

Steps to be taken

1.    Place a lemon in an empty clean container. Add a few drops of water and cover the container tightly with plastic wrap or aluminium foil.
2.    Store it for a week or more in a dark place, such as a kitchen cabinet.
3.    Then take out the lemon. Look at it carefully with a magnifying glass.
4.    You will see soft, green mold growing on the lemon. (Don’t touch the mold or breathe on it because you may be allergic to it.)

How it Happen?

The green fuzzy mold on the lemons is actually a colony of millions of one-celled plants growing together. They grow on food that is kept too long and make it change colour and smell bad.
This particular mold, the same kind that grows on blue cheese, is the one from which scientists make penicillin, the medicine that fights harmful microbes when we’re sick.
When you finish examining it, place the moldy lemon in the container and replace the wrapping. Dump it in the nearest trash can—and wash your hands.
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  • a lemon
  • a clean empty container
  • water
  • a magnifying glass or hand lens
  • plastic wrap or aluminium foil