MICR 2420 Lecture Notes - Lecture 2: Lysozyme, Carl Woese, Archaea
Document Summary
Quesion: t. pallidum is a small bacterium that causes syphilis & is fragile and can only survive inside the human body; koch"s postulates have not been fulilled. Ignaz semmelweis was the irst proponent of hand washing as an important process for physicians in hospitals. Pioneered the use of a clean (free-from microbes) operaing area for his paients. Discovered penicillin by accident; noiced the other bacterial colonies were not growing close to the penicillium colony. Each microbe contains its own genome and capacity to reproduce. Some bacteria can be seen with naked eye. Koch"s work indicated the importance of culture in pure communiies. But only 0. 1% of microbes can be cultured by tradiional methods. Studying microbes in their natural habitat is the domain of the microbial ecologist: microbial ecologists discovered that biogeochemical cycling of earth"s elements is a largely microbial process o o. These biogeochemical cycles are the foundaion on earth. Discovered liphotrophs, enrichment cultures, winogradsky column (a wetland model ecosystem)