11:680:491 Lecture Notes - Lecture 5: Biosafety Cabinet, Pasteurization, Germination
31 Aug 2016
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1863-1865 use mild heat to reduce # of organism- retards spoilage (used for wine) Demonstrated presence of microbes in air- if air could not enter flask, no microbial growth. Existence of heat stabile and heat labile forms. Tyndallization- sterilize food experiment: box filled with tubes only exposed to filtered air- light source shown through box- shows air in box contains no particles that reflect light-sterile. Bacterial endospores were heat resistant forms one of the founding fathers of microbiology single-celled algae studies. Early recognition of infectious nature of disease is documented - not uniformly accepted- no scientific explanation. 1822-paper said yellow fever not contagious thought diseases came out of swamps. Vocab/concepts set 5 practical applications preceding koch"s postulates and other evidence supporting. Edward jenner-vaccination fungi shown to cause disease of silkworm pasteur"s work showing spoilage of wine is due to bacteria pear blight shown to be caused by bacteria.
