Clara Vamvulescu Bacteria Page

The type of plate that I have is made of Luria Broth agar. It was exposed to the atmosphere in my dining room at room temperature for 45 minutes. It was then moved into my room where it is kept at fairly warm temperature (due to the warm weather), next to my window where it receives light daily. 

Clara Vamvulescu Long Term Bacteria Lab


                          

Number of different bacterial colonies




Conclusion

My bacteria plate was exposed to my dining room's atmosphere for 45 minutes. Then, I closed it and placed it on a shelf in my room for the next thirteen days at a fairly warm temperature because of the constant hot weather. The bacteria on my petri dish grew extremely fast in the first five days and then it leveled out to slowly increasing in colonies over time. By using ImageJ I was able to observe how many colonies grew per day. I hypothesize that if there is a limited amount of agar and nutrients in the petri dish, then the growth of my bacteria is limited in growing further. The growth pattern that I observed in my petri dish is logistic growth since the bacteria ceases to grow as much due to the small amount of agar and nutrients left. My bacteria covered almost the entire space of the petri dish, was fairly uniform, and the bacteria formed in clumps of different shapes. Although my bacteria colonies were very close together, I was still able to distinguish one from another while analyzing each photo of the plate. 

What I Have Learned

I have learned, over the course of this project, that bacteria always has a logistic growth pattern which is affected by it carrying capacity and available resources. Bacteria also grows in different shapes, colors, forms, and sizes and that they are all particular and grow at a rate which is affected by their surroundings and what is available for them to grow off of. I predict that if the amount of contained agar is larger, the amount of bacteria that will grow will be greater as well since there is bigger carrying capacity, amount of nutrients, and amount of agar for the bacteria to grow in. 


Link to screenshots on picasa: https://picasaweb.google.com/110485448905362972852/ScreenshotsOfAnalysis?authuser=0&feat=directlink
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clara vamvulescu,
Sep 22, 2014, 11:23 PM
ą
clara vamvulescu,
Sep 22, 2014, 11:23 PM
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