Tombakoğlu, Ekin (2013) INVESTIGATING THE EFFECT OF ISOPROPYL ALCOHOL PERCENTAGE IN DISINFECTANTS ON THEIR BACTERIA KILLING CHARACTER. Other thesis, TED ANKARA COLLEGE FOUNDATION PRIVATE HIGH SCHOOL.
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Abstract
Disinfectants are used for cleaning in many places because of their bacteria killing features. The focus of this study is observing the effect of the alcohol percentage in disinfectants on their bacteria killing character. It isn’t possible to test all kind of alcohols, so isopropyl alcohol is chosen for testing. The aim of this study is to investigate if the percentage of isopropyl alcohol in disinfectants has an effect on the bacteria killing effect of that disinfectant by observing the bacteria formation in the well after mixing same volumes of disinfectants that have different percentages of isopropyl alcohol in it and bacteria-agar suspension. Bacteria (Staphylococcus aureus) that are used in the experiment are gathered from a public bus by using swab. As a conclusion after observing the effect of disinfectant with 25%, 10% and 0% isopropanol on the survival of S.aureus, these results have been obtained: 5.3 percentage of bacteria survival is measured when disinfectant with 25% isopropanol (the most concentrated disinfectant) is used, 53.6 percentage of bacteria survival is measured when disinfectant with 10% isopropanol and 80.6 percentage of bacteria of survival is measured when disinfectant with 0% isopropanol (the least concentrated disinfectant). So it can be said that as the percentage of isopropanol in a disinfectant increases (when other alcohol percentages are constant) its bacteria killing effect increases. These results verify the research question of the study which is: “Is the percentage of isopropyl alcohol in the disinfectants, which are 25%, 10%, 0%, affect the survival percentage of Staphylococcus aureus when the ethyl alcohol percentage in the disinfectants are constant and equal to 70%?”.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | SUPERVISOR: DIDEM OLUKLULU, IB Notu: C |
| Uncontrolled Keywords: | effect of the alcohol, disinfectants, bacteria killing |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Depositing User: | Users 114 not found. |
| Date Deposited: | 17 Sep 2013 08:12 |
| Last Modified: | 17 Sep 2013 08:12 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/360 |
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