MIIM20001 Lecture Notes - Lecture 9: Louis Pasteur, Phytophthora Infestans, Postpartum Infections
5 Aug 2018
School
Department
Course
Professor
Document Summary
Challenging of spontaneous generation generation claimed heating the air in sealed flasks destroyed its ability to support life: after spallanzani s experiments supporters of spontaneous, several investigators worked to challenge these claims. Louis pasteur (1822-1895: pasteur filtered air through sterile cotton wool. Found objects resembling plant spores had been trapped: he then placed cotton wool into sterile medium. Growth occurred: hypothesized: air contained microbes capable of growth, he then conducted an experiment using swan-neck flasks to prove his hypothesis. If the swan-neck was left: flasks of broth with (cid:498)swan- necks(cid:499) were boiled, but not intact no like developed and air) broth showed in the broth. If the swan-neck was broken (letting in dust microbial growth. Pasteur was also the first industrial microbiologist or biotechnologist. He showed that produce alcohol: yeasts fermented sugar in grape juice to, but the presence of bacteria produced unwanted acid in the wine ie. caused (cid:498)diseased(cid:499) wines, this work also laid a practical basis for the.
