expº 2 progress

This is the second set of experimentation I did, and now significant results can be observed.
I made 5 plates, each of them set up in different conditions.

In the first plate, I passed a 5V current though the agar. Throughout the growth, colonies started to grow separately from each other, very condensed and isolated.

Unlike this next one, where it was kept within room light/temperature. The growth was vast and 'messy'.

This next plate was kept in total darkness during the whole experiment. The result is somewhat similar to the plate with electricity.

This one was kept under heat produced by 2 small tungsten bulbs. The growth was very fast and spread uncontrollably. After a few days, the bacteria stopped growing - maybe too much heat/light? There was a lot of condensation in the plate.

expº 1 update

These are the results of the first experiment seen in the previous post.
There was a difference in growth between the plate with current and the one with no disturbance.
I turned the current off one week after the plate was set up. At first, small colonies started to appear, isolated from one another. After I removed electricity, the growth became more uniformed like the first plate shown below.

Forum reply

Re: Bacteria and Electricity
New postby TroyPercival » Thu Nov 12, 2009 3:11 am

Here are a couple research studies about electricity and bacterial growth that you might find helpful.

http://www.aanos.org/documents/Eff%20of ... 0Grwth.pdf
http://www.ncbi.nlm.nih.gov/pubmed/8308318

A similar project was done in the 2009 California State science fair project.
http://www.usc.edu/CSSF/Current/Projects/J1722.pdf

Michael

Project links

Some more precedence,
Mark Hansen - Listening post.
Life support systems: Vanda
Vanda project

Progess of 1st expº

Bacteria has started to grow and is visible in most of the plates. There does not seem to be any difference between Tz and T.

Experimentation

Here are some pictures of some experiment.
I am trying to run electricity through agar in one of the petri dishes. I have already deposited some bacteria on the agar and covered the 5 plates. Now let's wait and see.



The copper wire used to run current in the plate.










Tz - Toilet water with electricity.
T, T - Toilet water without electricity.
F - Fridge door handle.
C - Control. (the plate where no bacteria, distilled water on agar.

Bacteria science links

Growing bacteria (Science Enterprises)
Some growing experiments
How to grow bacteria
Forum for growing bacteria