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Testing the effectiveness of various anti microbial agents. Aim: ~ We are trying to find out what bleach solutions and other solutions will work best at killing Microcuccul luteus (safe bacteria). Apparatus: ~ 2 Petri dishes per person Ethanol Scalpel Cork borer Bleach solutions Other substances of your own choice Bunsen burner Protective mat Cotton wool Pipette Predictions:~ I predict that: Prediction 1:~ 20% bleach will be the best anti-microbial agent. Prediction 2:~ Toothpaste will have a large inhabitation zone. Prediction 3:~ Water would have the worst inhabitation zone. Method: ~ *Firstly you need to sterilise the whole area and all of the equipment with ethanol. This is done so that no microbes can get into the safe bacteria environment unless it is absolutely necessary. Your hands must be washed with soap so that they do not have any bacteria on them. *Once this is done you need to sterilise your cork borer. You do this by dipping it in ethanol and putting up against a half roaring flame. Hold the cork borer...

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