Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Experimental design Summary This experiment was done in order to investigate certain factors affecting the killing of the bacterium Escherichia coli. The two factors investigated were: a) the length of time of exposure to Domestos and b) the concentration of this agent on killing E.coli. The methods used in the experiment were serial dilution and pouring Petri dishes. The results indicated that both the above mentioned factors influence the behaviour of this disinfectant agent and affect the growth of the micro-organism tested. This experiment's procedures and results are analysed and its design is assessed for accuracy and precision. Introduction Escherichia coli is considered to be a model organism for studying a variety of life's essential processes because of its rapid growth rate and simple nutritional requirements. The average human intestines contain about 1 kg of bacteria. Approximately 0.1% of these are normally E. coli. Their presence within the intestines is necessary for normal...

To see the full version of this document, and 145,348 others