4. Discussion

4.1 Analysis of results

1.We calculate the result and calculate the average area of the bacteria
      2. Plot a graph on the average area of bacteria found in the amount of concentration in each cleaning agent.
     3. From the graph, we can find the best cleaning agent and concentration to kill the most amount of bacteria on the floor.

E.Coli


B.Subtilis


These are the average areas on the plated agar with no visible bacteria around the filter paper in the petri dish.

By calculating the area in cm of no visible bacteria around the filter paper, we would be able to find out which concentration is the most cost effective and the most effective to kill bacteria.

4.3 Explanation of key findings

Sometimes, an expensive product that may not necessarily be any better than a product that is of less than $10. This experiment also shows that sometimes, with a little bit of research, you can for yourself figure out what is best for what is the problem. For example, in the terms of using a 10-1 dilution for EC Oticide can be more effective in killing bacteria than using the standardized solution. This proves that our hypothesis, is correct, that 10-1 is the maximum dilution that is effective and sometimes more effective than the standardized dilution of the cleaning agent.

4.4 Evaluation of Hypothesis

Our hypothesis was correct. From the range of EC Oticide to Dettol, the 10-1 dilution instead of the standard dilution listed was better at killing bacteria. This also means that the 10-1 dilution is the most cost effective (in reference to the standard dilution) and also the best at killing bacteria, beating the standard dilution and 10-2 dilution.

4.5 Areas for improvement

We could have changed the concentration of the different cleaning agents as we found out that serial dilution was not very effect as our 10-3 and 10-4 did not have any effects whatsoever on the E.Coli bacteria or B. Subtilis bacteria when we did our experiment.

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