Relations To Pasteur’s Experiment Essay

656 words - 3 pages

Louis Pasteur was a French chemist who conducted his well-known experiment; “Pasteur’s Experiment” where two flasks were filled with beef broth and boiled for 30 minutes. One of the two flasks was sealed with an s-tube while the other was completely open. Mold grew in the open flask while the sealed flask simply became cloudy and dark. Bacteria can enter the open flask easily and spread rapidly but bacteria struggles to enter the sealed container due to the s-tube; bacteria cannot “fly” is falls and travels with opposing forces. Four other scientists’ discoveries or tests relate to this experiment, Francesco Redi, Lazzaro Spallanzani, John Needham, and Anton van Leeuwenhoek.
Francesco Redi is an Italian physician and poet who explained presence of maggots in meat does not occur in a sealed container or bag. Two jars both with meat in it. One of the jars is sealed with a cloth, and the other is left open. Flies come and lay eggs in the open jar but cannot enter the covered jar to lay eggs on the meat. Maggots arise in the uncovered jar while the covered jar remains maggot-free. Both meats still rot, although the covered meat does not become a home to maggots. This experiment relates to Pasteur’s because there are two separate containers, one covered or sealed with an S-tube or completely uncovered. Out of these two, only one involves boiling the material in the container. Both sealed containers do not grow mold or house maggots.
Lazzaro Spallanzani was one of the first to disprove spontaneous generation. He was an Italian scientist who demonstrated that bacteria could be destroyed by boiling. Flask 1 was left open, flask 2 was sealed, flask 3 was boiled and then left open, flask 4 was boiled and then sealed. These flasks were each filled with broth. Flasks 1, 2, and 3 all grew microbes. Flask 4 did not grow anything. The broth in each flask turned darker and cloudy over a certain time period. ...

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