Microsoft PowerPoint - Microbiology and Environment [

Microsoft PowerPoint - Microbiology and Environment [ - •...

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Unformatted text preview: • Microorganisms in the environment • Where are they found? • How diverse are they? • Role in geochemical nutrient cycles. • How do they grow and what are their requirements for INTRODUCTION growth and biodegradation? • Microorganisms in waste treatment: Biodegradation and environmental clean up. • Microbial production and products in industry • The genomic – metagenomic future Microorganisms in the environment; Challenging conventional views of life. r Sagan and Margulis (1998) “Garden of Microbial Delights”. c “ALL of the elements crucial to global life- oxygen, nitrogen,phosphorus, sulfur, carbon- return to a usable form through the intervention of microbes… Ecology is based on the restorative decomposition of microbes and molds, acting on plants and animals after they have died to return their valuable chemical nutrients to the total living system of life on earth” r Gould (1996) “Life’s Grandeur” The Power of the Modal Bacter. c The first multicellular organisms do not enter the fossil record until about 580 million years ago - this is after about five sixths of life’s history have passed. Bacteria have been the stayers and keepers of life’s history. Where are they found? Diverse environments • Virtually every environmental niche • Extremes of pH and salinity xtremes of temperature and pressure • Extremes of temperature and pressure • Without air (Anaerobic) • Growth on many chemical substrates • Attached to surfaces in biofilms • Geothermal vents and subterranean deposits Where are they found?...
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This note was uploaded on 06/21/2011 for the course CHE 774 taught by Professor Prof.rafigh during the Spring '11 term at Sharif University of Technology.

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Microsoft PowerPoint - Microbiology and Environment [ - •...

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