Köksaldı, İrem Semiha (2014) The significance of the difference between the Escherichia coli numbers in six different brands of 19 liters reusable plastic bottles of water. Other thesis, TED ANKARA KOLEJİ.
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Abstract
The purpose of this experiment was to see the amount of Escherichia coli in six different brands of 19 liter reusable bottles of water, and see if there is a significant difference between the amount of Escherichia coli they include or not. According to this, I came up with the research question: Is there any difference in terms of the amount of Escherichia coli in 19 liters reusable plastic bottles from 6 different brands, indicated by the membrane filter method? Six different brands of 19 liter reusable bottled water were chosen by considering their popularity and their prices. The ones with low popularity and price were chosen since they have a higher risk of contamination and named in alphabetic order as A, B, C, D, E and F. The amount of Escherichia coli in them was determined by the membrane filter method. The method can be briefly explained like this: The water is poured down the membrane filter system where the membrane filters don’t allow the passage of bacteria. Then, the filter papers are put on different petri plates and incubated. If there is right type of colorizations then, further tests are done to determine if the colonies are E. coli or not. At the end of the process, the numbers of colonies that are found out to be E. coli is counted and a result is obtained. In this experiment, ANOVA test is used and it proved that there is a significant difference between the amounts of E. coli in different brands of water since the p value is approximately zero.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | SUPERVISER’S NAME: GONCA ESENDEMİR, IB Notu: B |
| Uncontrolled Keywords: | Escherichia coli, water, plastic bottles |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Depositing User: | Kamil Çömlekçi |
| Date Deposited: | 12 Sep 2014 06:46 |
| Last Modified: | 12 Sep 2014 06:46 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/526 |
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