Hi Everyone,
This week was my first whole week in the lab. I focused mainly on calculations and locating everything I needed for the next few weeks. I also made fresh media this week. We made a few adjustments to last year's protocol in hopes that we get better jobs. We made adjustments by ordering flat bottom well plates to help bacterial biofilms stick better. We got an adhesive film to cover the plates to avoid too much evaporation and cross-contamination. By next week, I plan to plate some bacteria and measure the biofilms.
(I had to autoclave my media and bottles to store it in)
On Tuesday, I plated E. Coli and tested the effectiveness of 4 samples to kill the bacteria. The sample included , Aloe Vera gel (store bought), Windex, Tap water, and 70% Isopropyl Alcohol. This experiment was pretty much used to keep me busy as I haven't yet been able to start a project. However when I came in Wednesday, I found some interesting results. The zone of inhibition was basically 0 for every sample, including the isopropyl alcohol. Although the tap water, being the control, and the Windex doesn't jump out as a surprise to me, the 70% Alcohol does. Originally I had two hypothesis's on why this occurred. One being that because E. Coli is a gut bacteria and therefore is built to withstand alcohol. The second theory suggest user error such as the letting the alcohol evaporate to much before I was able to put the disk on the plate. Because of the results on Wednesday and with the first hypothesis in mind, I chose to do another plate instead with Staphylococcus. I ch...
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