Where can I buy Petri dishes and nutrient agar?

Recipe for AGAR for 9 petri dishes?

  • I need a recipe quick... Please help me! I need it for 9 petri dishes for a science fair project. Need HELP!!!

  • Answer:

    You soak agar like unflavoured gelatin then dissolve it in hot water, I would add some food colour for petri dishes, use if you have the powder 1 tablespoon for 1 1/2 cups of hot water, for the strands use 12-20 soak and dissolve the same way as the powder. Let them set, agar unlike gelatin will set at room temperature and not melt when warmed for incubation.

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10% by weight. 9 grams of agar in 81 ml water. Boil until dissolved, pour into sterile plates.

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