GMU:DIY Bio: doing things with biology/Antje Danz

From Medien Wiki

First class 16. Oktober 2018

Preparing the first testing Agar-Plates for bacterial growth in a petri dish:

  • petri dishes where filled with 15 ml of an LBP Medium with Agar Agar
  • cooling down
  • inoculateing with different surface smear
    • In my case: human nose (inside), cat nose (outside) and fur, fridge glass surface and 1 cent coin
  • left with room temperature for the following days

Evolution

Closer look at day 7

Somehow I got the impression that the petri dishes weren't sterile as after 7 days almost the full dish is covered. Something seems to grow over the originally touched sections. See below some close ups. In the section of the example I took from my nose, a small yellow dot appears. I think this is what was intended to be growing. The rest just looks almost the same.

DIY Microscope Test

  • extracted converging lens from a laser pointer
  • attached to iPhone 5 SE back camera
  • adding some filters to increase contrast und depth