Familiarity with residents

What you’ll need

  1. Petri dishes, 5-10 pieces
  2. Agar
  3. Lysogenic nutrient medium LB
  4. Glucose
  5. Microbiological loop
  6. Gloves and mask
  7. Kitchen scales or at least “weight” app on your smartphone
  8. A stove

To get the items from paragraphs 1 to 5 by simply buying a set for school laboratory work: it will cost you about 5 thousand rubles.

Prepare a nutrient medium

  1. Take any container, the volume of which you are aware of, and pour the water back.
  2. Pour in a Cup of LB at the rate of 25 grams per liter.
  3. Send same agar from the calculation to its share in the solution was about 1-2%.
  4. Boil the entire mixture (do this in the microwave, for example) so that the agar is dissolved, then let it cool.
  5. Add a solution of glucose at the rate of 360 milligrams per 100 milliliter. Possible — but within reason. Can add yeast extract: it is a growth factors, you need some bacteria.
  6. Heat all this up to 80 degrees (here you will need a thermometer for the oven or just a digital thermometer with a probe). All the environment is ready.


Tell the truth: we this stage is “hacked” and used the equipment of the laboratory of Boris Renuka from the research Institute of Physico-Chemical Biology. A. N. Belozersky. We used the autoclave to sterilize the environment and laminar box for all other preparations.

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