PHCY219 Lecture Notes - Antonie Van Leeuwenhoek, Louis Pasteur, Pasteurization
8 Aug 2013
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First terms test will have two questions from each lecture. 30 mcqs in total to answer in 50 minutes. Objectives: describe the major microbiological discoveries in history. Need to remember the year, the scientist and the discovery!! 1664 - robert hook: observation of mould under a crude microscope. 1684 - antoni van leeuwenhoek: observation of further detail. Dust and microbes can settle in the s-bend of the flask but the angle of the glass means that it can"t enter the body of the flask and contaminate the liquid in there. Note: even though the flask was sterilised, dust and microbes were still able to settle in the s-bend of the flask (open top). By tipping the flask, the microbes were carried back into the body of the flask. In the presence of moisture, these microbes grew. The microbes that contaminated the sample came from the air. This was a theory that perhaps life was generated spontaneously.
