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ADOPT A MICROBE - Page Text Content


BC: REMIKAZE NAMIKAZE | Aut Coepisse Noli Aut Confice

FC: Adopt a Microbe | By Muhamad Rahimi Farhan bin Ruslan | MICROBIOLOGY

1: Geobacter sulfurreducens | The microbe that i adopted is..... | Nicknamed nanowires for their role in moving electrons


3: DESCRIPTION | Geobacter sulfurreducens is a gram-negative metal and sulphur-reducing proteobacterium.It is rod-shaped,obligately anaerobic,non-fermentative non-motile an closely related to Geobacter metallireducens. Anaerobic bacteria that are found below the surface and are one of the predominant metal-reducing bacteria.Geobacter sulfurreducens can oxidize organic compounds and couple that to the reduction of metals.

4: The Geobacter sulfurreducens PCA strain was discovered in a sample of soil contaminated by hydrocarbons in Norman, Oklahoma. As this bacteria in genus of Geobacter,its is known as the sediment-loving microbe whose hairlike filaments help it to produce electric current from mud and wastewater. | DESCRIPTION | DESCRIPTION

5: ECOLOGY | Geobacter sulfurreducens is of considerable ecological importance due to its wide range of biotechnologically exploitable bioremediation capabilities. The organism is involved in carbon cycling, can precipitate soluble metals, and has the ability to generate electricity. Insoluble materials like iron, magnesium, and uranium oxides, that cant be broken down into soluble subunits can be metabolized by Geobacter. Geobacter is capable of an anaerobic respiration using one or another of these solid oxides as the terminal electron acceptor.

6: METABOLISM & NUTRITION | Geobacteraceae constitute such an abundant and environmentally important group in both pristine and contaminated sediment environments. Geobacter species are metabolically diverse and can grow with numerous electron donors and acceptors, including acetate or H2, and Fe(III), fumarate, or malate, respectively.

7: They have been shown to be enriched when Fe(III) reduction is promoted in a petroleum-contaminated sandy aquifer and to mediate the reduction of U(VI) to U(IV), converting the soluble form to the insoluble form and effectively removing the uranium from the groundwater. Geobacter shapes biogeochemical cycling directly through its metabolic activity, as well as indirectly, such as via the effect of iron (hydr)oxide reduction on the motility of sorbed trace metals and on pH. | METABOLISM & NUTRITION

8: SIGNIFICANT | Bioremidation Geobacter species are also of interest because of their role in environmental restoration. For example, Geobacter species can destroy petroleum contaminants in polluted groundwater by oxidizing these compounds to harmless carbon dioxide and can remove radioactive metal contaminants from groundwater. As understanding of the functioning of Geobacter species has improved it has been possible to use this information to modify environmental conditions in order to accelerate the rate of bioremediation.

9: SIGNIFICANT | Bioenergy Geobacter species play an important role in some anaerobic wastewater digesters degrading organic contaminants with electron transfer to microorganisms that produce methane, an important biofuel. Recent results suggest that this electron transfer proceeds through Geobacter’s conductive microbial nanowires. The ability of Geobacter species to oxidize organic compounds with electron transfer to electrodes shows promise as a strategy for producing bioelectricity, especially in remote environments.

10: SIGNIFICANT | Bioelectronics Geobacter species have novel electronic properties that may have practical applications. For example, they can form highly cohesive conductive films that have conductivities that rival those of synthetic conductive polymers. The conductivity of the Geobacter films results from a network of microbial nanowires, thin (ca. 3 nm) protein filaments that conduct electrons along their length with metallic-like conductivity. Thus, Geobacter offers the possibility of making electronic sensors and other devices,that work under water and can readily couple biological and abiological interfaces, from inexpensive feedstocks, like acetic acid (i.e. vinegar).

11: SIGNIFICANT | System approach to enviromental microbiology Geobacter species have proven to be an excellent model for the development of genome-scale analysis of natural environments, bioremediation, and bioenergy applications. This approach has included sophisticated diagnosis of the physiological status of the subsurface microbial community during bioremediation to guide bioremediation supplements and predictive computer modeling of groundwater bioremediation coupling genome-scale metabolic models with geohydrological models.

12: VIDEO | Geobacter The Electricity Producing Bacteria https://www.youtube.com/watch?v=8n1LsafQ194

13: REFERENCES | A) Internet http://microbewiki.kenyon.edu/index.php/Geobacter_sulfurreducens http://www.geobacter.org/ http://eol.org/pages/995377/details http://objectifterre.over-blog.org/article-34652499.html http://aem.asm.org/content/69/3/1548 http://en.wikipedia.org/wiki/Geobacter http://en.wikipedia.org/wiki/Geobacter_sulfurreducens

14: B) Books Bond DR, Lovley DR (March 2003). "Electricity production by Geobacter sulfurreducens attached to electrodes". Applied and Environmental Microbiology 69 (3): 1548–55. PMC 150094. PMID 12620842. Butler, Jessica E; Young, Nelson D; Aklujkar, Muktak; Lovley, Derek R (2012). "Comparative genomic analysis of Geobacter sulfurreducens KN400, a strain with enhanced capacity for extracellular electron transfer and electricity production". BMC Genomics 13 (1): 471. doi:10.1186/1471-2164-13-471. ISSN 1471-2164 | REFERENCES

15: MY THOUGHTS | Through all the process of completing this scrapbook,i have learn many things about microbe that i never known before.Its suprise me a lot as i never imagine that a microscopic organism like bacteria could produce electricity from just a mud or wastewater.I totally respect this bacteria because of its 'super power' and its contribution to other living living thing and the environment.There are many other microbes that have amazing function and feature in this world that I never know that they exist,I can't wait to learn about them to soon..

16: MY SELF | Name : Muhamad Rahimi Farhan Bin Ruslan Age : 19 Matrix no : 171871 Program : Bac. Science (Honour) Microbiology University : University Putra Malaysia (UPM) Email : remikazex94@gmail.com Motto : Aut Coepisse Noli Aut Confice


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