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Unformatted text preview: Microbiology: Overview of the Microbial World--We are studying the unseen world. (ranging from eukaryotes-- prokaryotes--non cellular). We need to have a general understanding of the metric system. 1) Milli, 2) Micro, 3) Nano. Eukaryotes: Animal Cells, Plant Cells, Multicellular Algae, Fungi, Protozoa, Unicellular Algae Prokaryotes: Eubacteria, Archeobacteria Noncellular: Viruses, Other Noncellular forms (viroids, prions) ALL LISTED IN PINK ARE MICROORGANISMS. Humans and microbes: We inhabit THEIR world. They inhabit our bodies. (normal microbiota in mouth, ileum, or on the skin.) Random fact: The increases in the levels of moisture and under arm smell comes from the metabolic processes of microbes in the armpit. You are increasing their growth when you sweat. You aren't going to get rid of the microbes on your skin. You get rid of them by rubbing your skin cells off. Microbes are essential to all forms of life on the planet earth: 1) Oxygen Production: There are photosynthetic prokaryotes (cyanobacteria) and photosynthetic eukaryotes (single cell algae) 2) Bacteria "fix" atmospheric nitrogen. They capture nitogen gas. Our cells are made up of Carbon, Hydrogen, Oxygen, and Nitrogen. However, we cant use nitgen gas. We need nitrogen from a plant source. We need microorganisms (bacteria), to convert n2 into nh3 or nh4, something to create ammonia. n2 is not useable by plants or animals. 3) Decomposition/recycling of organic matter into useable nutrients (chemoheterotrophs.) Other uses: Microorganisms are also used in the production of: Fermented Foods (tofu, dairy, alcohol, etc, probiotics) Industrial Chemicals (acetone in nail polish) Pharmaceuticals (some vaccines. hepatitis b vaccine was the first recombinant DNA vaccine produced by yeast cells) Biofuels ( algae in its regular cycle can be used in biofuel production) Bioremediation (aka cleaning up. It uses the natural metabolic products of microorganisms. for example, toxic chemicals, oil spills--they get carbon and other organic materials from the toxic chemicals and oil spills. For example, DDT is a toxic insecticide that a certain fungi can break down. First Reported Sighting: Antoni Van Leeuwenhoek [late 17th century, 1670/1680] He was a dutch habidasher that sold accessories to men. His hobby was grinding down magnifying glasses. He said "let's look at things other than stars through the magnifying glass". He published his findings & his drawings. (he looked at pond water, and also scraped off a sample from the inside of his mouth which drawings....
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