| Line 1: | Line 1: | ||
==First class 16. Oktober 2018== | ===First class 16. Oktober 2018=== | ||
==Synopsis== | |||
Preparing the first testing '''Agar-Plates''' for bacterial growth in a petri dish: | Preparing the first testing '''Agar-Plates''' for bacterial growth in a petri dish: | ||
*petri dishes where filled with 15 ml of an [[GMU:DIY Bio: doing things with biology/Introduction to conceptual framework and tools|LBP Medium]] with Agar Agar | *petri dishes where filled with 15 ml of an [[GMU:DIY Bio: doing things with biology/Introduction to conceptual framework and tools|LBP Medium]] with Agar Agar | ||
Revision as of 12:17, 22 October 2018
First class 16. Oktober 2018
Synopsis
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
First culture medium
Day 1
Day 3
Day 6
Day 7
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 with a white film. You can only guess by slightly different colors where I initially inoculated the dish. Something seems to grow over the originally inoculated 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.
Cat fur and outside nose
1 Euro cent
Day 7 - Full dish
Human nose inside
glass surface fridge
DIY Microscope Test
- extracted converging lens from a laser pointer
- attached to iPhone SE back camera
Chestetree seed
Sunflower seed
Sunflower and chestetree seed in comparison
Chestetree seed magnified
Sunflower seed magnified
- adding some filters to increase contrast und depth
Artsy chestetree seed
Artsy sunflower seed
