Sulfate Reducing Bacteria
Sulfate Reducing Bacteria - Related Videos
02:15
Subculturing Sulfite-Reducing Anaerobic Bacteria from an Agar Culture
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2025
Source: Anwar, Z., et al. Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples. J. Vis. Exp. (2019).In this video, sulfite-reducing bacteria are cultured in a sulfite-containing agar medium, where they grow anaerobically and reduce sulfite to hydrogen sulfide, forming black precipitates with iron ions. Black colonies are isolated from the agar depth using aseptic techniques and transferred to fresh medium for continued anaerobic incubation.
02:52
Synthesis of Metal Oxide Microcapsules Using Metal-Reducing Bacteria
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2025
Source: Lin, P., et al. Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion. J. Vis. Exp. (2018).This video demonstrates the procedure for synthesizing rigid metal oxide microcapsules by culturing metal-reducing bacteria with metal ions, followed by sequential purification through sonication, centrifugation, and ethanol washing.
03:15
Silver Staining of Sulfated Glycosaminoglycans: A Staining Method for Visualization of Sulfated Glycosaminoglycans in Polyacrylamide Gels
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2025
In this video, we demonstrate a procedure for combined Alcian blue and silver staining of sulfated glycosaminoglycan oligosaccharide fragments. This combined staining technique significantly amplifies the bands of glycosaminoglycan polymers of different lengths in polyacrylamide gels.
10:19
Reducing Agents
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2023
Source: Vy M. Dong and Daniel Kim, Department of Chemistry, University of California, Irvine, CA Controlling the reactivity and selectivity during the synthesis of a molecule is very important criteria for chemists. This has led to the development of many reagents that allow chemists to pick and choose reagents suitable for a given task. Quite often, a balance between reactivity and selectivity needs to be achieved. This experiment will use IR spectroscopy to monitor the reaction and to...
01:29
Sulfate Attack on Concrete
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2024
Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt. Sulfates from sources like soil, groundwater, or industrial effluents...
FAQs
The pathway proceeds through enzyme-mediated reduction steps rather than a single conversion. Sulfate serves as the terminal electron acceptor during anaerobic respiration, and specialized enzymes drive its reduction through intermediates such as sulfite before sulfide forms. Organic compounds or hydrogen donate the electrons required for this sequence, linking energy conservation to sulfur transformation.
Oxygen availability and electron supply are central conditions for this metabolism. In oxygen-limited settings, sulfate-reducing bacteria can use organic compounds or hydrogen as electron sources while directing electrons to sulfate. Their activity then contributes to sulfur and carbon transformations in sediments, wetlands, soils, and other anaerobic environments where these reactants and conditions occur.
These bacteria connect the sulfur and carbon cycles because sulfate reduction is powered by electrons from organic compounds or hydrogen, while sulfide becomes a product of the same respiration. Their activity therefore couples energy metabolism to transformations of both elements, especially in sediments, wetlands, soils, and oxygen-limited aquatic environments.
An investigation can begin by examining sediments, wetlands, soils, or oxygen-limited aquatic environments where this metabolism occurs. Researchers can then relate sulfate conversion and sulfide formation to the organisms’ activity while considering organic compounds or hydrogen as electron sources. This approach connects microbial processes with sulfur and carbon transformations in the sampled habitat.
Studies of oil and gas systems consider whether anaerobic sulfate reduction contributes to sulfide formation in those environments. Researchers interpret sulfur transformations in relation to the system while accounting for sulfate, organic compounds or hydrogen, and oxygen limitation. This biological context explains why sulfate-reducing bacteria are important subjects in oil and gas research.
Metal corrosion is one industrial outcome associated with sulfate-reducing bacterial activity. Because these organisms generate sulfide during anaerobic sulfate reduction, researchers consider their metabolism when examining corrosion in environments containing sulfate and suitable electron sources such as organic compounds or hydrogen. This connection makes sulfate reduction relevant to industrial research as well as microbial ecology.
Their activity is relevant to wastewater treatment and bioremediation because it changes sulfate into sulfide under oxygen-limited conditions. These applications place the organisms in an environmental-engineering context, where researchers consider how microbial sulfur transformations affect treated or contaminated settings. The same metabolism also connects practical work with broader sulfur-cycle biology.