6. Conclusion

Our hypothesis that if Dettol is used, it can kill more bacteria than the rest of the agents, was proven wrong in the course of our experimentation. At the end of the experiment, we came to a conclusion that Clorox was the most effective antibacterial agent, as if it is used, it can kill more bacteria than the rest of the agents.

Practical applications & area for further study
Since we have chosen the best anti-bacterial agent from our experiment, it is evident that Clorox can effectively remove germs. Cleaning can be done with Clorox, to ensure that the number of bacteria growth is greatly reduced and that people are working and living in safe healthy environments. Since the Clorox product that we have used is able to kill bacteria effectively, other Clorox products that use the same formula may offer the same protection against bacteria and these agents are able to keep the environment safe and clean. Keeping the environment safe and clean can help to ensure safe health levels, and a healthy community of people.


We also want to test if Clorox can kill off all the germs and bacteria which are found everywhere, be it at home or at any other places, since the bacteria differs from one place to another, and some bacteria may already have grown resistant towards such antibacterial agents, and this will allow us to conduct more detailed investigation, as to which kind of agent suits killing such resistant bacteria.

Comparison to previous experiments:
Experiment 1:
Similar to our experiment, the experiment above was carried out to test the effectivity of antibacterial cleaning agents, Dettol and Clorox. The procedure, however, was slightly different from our own experiment. For our experiment, we first spread bacteria onto the LB agar filled petri dishes, before spreading the cleaning agents onto the dish. Instead, in the other experiment, blood agar was used, and the bacteria was obtained from the chopping boards after a fish was cut and deboned on each board, and a the remaining bacteria was swabbed onto the agar dish. As the colonies of bacteria grew, the diameter of the bacteria colonies were measured. As for our experiment, we measured the number of colonies after incubation. Similar to our results, Clorox kills more bacteria than Dettol.
(“Science Fair Projects”, n.d.)

Experiment 2:
The experiment above was conducted to determine if antibacterial products lose effectiveness in killing common bacteria in everyday environments after repeated use. Bacteria cultured in rich media were treated in four antibacterial products which contained common active ingredients,  thymol, lactic acid, sodium hypochlorite, and ethanol. The bacteria was cultured in rich media and left to row in a dark environment, and after some time, 10 sheets of stacked filter paper dipped into the chosen antibacterial product was placed into the media with bacteria. The data was measured by observation of killzone, after a colony of treated bacteria was grown and treated again, and the process repeated again. The results show that sodium hypochlorite was most efficient, followed by lactic acid, thymol and ethanol. Compared to our experiment, we did not allow our experiment to grow bacteria until it formed a big colony in which killzones could be measured, and instead we measured the number of colonies after spreading the antibacterial agent.                                                 (“www.ncseonline.org”, n.d.)

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