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Investigate the Effect of Anti-Bacterial Products on the Growth on Skin Bacteria

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Introduction

Investigate the Effect of Anti-Bacterial Products on the Growth on Skin Bacteria Hypothesis Microbes are organisms that get inside the human body, which then make you ill. There are two main types of microbes: bacteria and viruses. Bacteria are very small living cells; most are less than 1 micron (0.001mm) in length. They lack the internal call membranes, this means that they have no nucleus. Bacteria occur almost anywhere: in air, water, soil, and inside other organisms. They like warmth but some ca survive at the tops of the Alps where it is very cold. Others live in hot springs at near-boiling temperatures. Some bacteria are parasites and cause serious diseases. The microbes that cause disease are called pathogenic. If they enter the human body they damage cells and produces toxins which make you feel ill. Microbes can enter the human bodies in 5 different ways, through: the skin and eyes, the digestive system, the respiratory system, reproductive system and vector (mosquitoes, fleas). Some bacteria are beneficial for example they are important in decomposition, getting rid of sewage and making butter yoghurt and cheese. In decomposition all plant matter and dead animals are broken down and decomposed. As a result of their activities simple substances are released from the dead bodies and plants can use these again. ...read more.

Middle

* Water * Bunsen burner * Cork borer * Fine spatula * Sterilised pipettes * Beaker of disinfectant * Marker pen, sticky tape, goggles, a clean lab coat. Method * Put on safety goggles. Take the cork borer and flame the end briefly in the Bunsen burner. Do not flame the end to long otherwise the heat will travel up to the top and burn you. * Wait for it to cool. Then make 3 holes in the agar by pressing down with the cork borer in it. Remove the plugs with a fine spatula into a beaker of disinfectant. Do this as quickly as possible so that the bacteria can not escape. * Turn the agar up side down and label the wells 1-3. Then add 0.5ml of each solution in to a well using sterilised pipettes and label: 1 = water, 2 = soap solution, 3 = Clearasil. * Tape the lid to the base to make it physically secure. Keep the plate at 25 degrees Celsius. You must be very careful that when moving the plate to make sure that the solutions do not spill out of the wells. * After the solutions have been saturated by the agar turn the plate up side down. ...read more.

Conclusion

After we used equipment that had touched the bacteria we put it in a beaker of disinfectant so that there was no chance of bacterial growth. The accuracy of the experiment was very good because after day 3 or so we turned the plates upside down so that the condensation would effect our results. If we were to have left it upright then the condensation would have mixed with he solutions and made them dilute. Then this would make it an unfair test. There were not any anomalous results. However I expected soap solution to have worked better on SE than I had predicted. The ways in which I could have improved my procedure it that I could have taken more results. For example in I had taken results on day 2 for Clearasil on ML then I could have seen weather the solution worked better on day 2 or day 3. Therefore I should have taken daily results to enforce the results, then I could have seen a gradual increase. From the evidence I have obtained from conclusion I would definitely say that Clearasil worked as the most effective. I could have don further worked by put my agar plate at room temperature and seeing if the warmth makes any differences. If I had put it outside I think it might have been better because then the temperature changes just like your skin if it is hot or cold. ...read more.

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