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Showing 1 to 20 of 102 for “"Methanogenic"”.
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Methanogenic bacteria as endosymbionts of sapropelic protozoa
Contains fulltext : mmubn000001_02908637x.pdf (Publisher’s version ) (Open Access)
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Methanogenic Paraffin Biodegradation and the Underlying Syntrophic Relationships
… environmental concerns they pose when spilled. Methanogenic biodegradation through syntrophy plays an important role in their degradation, with implications for remediation and oil recovery. There is still much to learn about methanogenic biodegradation of recalcitrant hydrocarbons such as …
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Physiological and phylogenetic studies of marine methanogenic bacteria
… has not been previously reported. A marine methanogenic consortium consisting of fermentative, hydrogen-producing acetogenic and methanogenic bacteria is described. An acetotrophic methane-producing strain of bacteria was isolated. This isolate expresses three distinct morphovars: individual …
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Mechanisms of Methanogenic Inhibition in Advanced Anaerobic Digestion
… MAD, especially at elevated temperatures as methanogenic inhibition resulted in the accumulation of headspace hydrogen, thus resulting in poor removal of volatile fatty acids. The thermodynamics of fatty acid metabolism was favorable at each digestion temperature, thus it was concluded that …
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Activity of methanogenic archaea under simulated Mars analog conditions
… on Mars. Therefore the phylogenetically old methanogenic archaea, which have evolved under early Earth conditions, are often used as model-organisms in astrobiological studies to investigate the potential of life to exist in possible extraterrestrial habitats on our neighboring planet. In …
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Thermophilic Methane Production and Methanogenic Bacteria From Cattle Waste
Made available in DSpace on 2014-12-14T15:29:40Z (GMT). No. of bitstreams: 1 7804185.pdf: 3849748 bytes, checksum: 7fc2cd0bbfe8b625d9bbd68869ed0dac (MD5) Previous issue date: 1977
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Biodegradation of pesticide and indolic compounds under methanogenic conditions
… of atrazine, cyanazine, and dicamba under methanogenic conditions was evaluated using serum bottle microcosms containing wetland soil inocula obtained from three different sites. Pesticides were monitored by high-performance liquid chromatography (HPLC) and the production of methane was …
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Omics-based characterization of complex anaerobic metabolism in methanogenic wastewater treatment
… Since the discovery that we can tame such “methanogenic” (methane-generating) microbial communities to convert society’s organic waste to CH4 as a recoverable fuel, this biotechnology has become an essential component of managing municipal and industrial waste and development of sustainable …
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Sulfite reductase and thioredoxin in oxidative stress responses of methanogenic archaea
… tolerance and oxidative stress responses in methanogenic archaea, which are obligate anaerobe. Our research concerns two aspects of oxidative stress. (i) Responses toward extracellular toxic species such as SO32-, that forms as a result of reactions of O₂ with reduced compounds in the …
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Substrate Specificity and Molecular Characterization of PAH-Degrading Anaerobic Enrichment Cultures Under Methanogenic Conditions
Over the past several years, this lab has cultivated enriched anaerobic mixed cultures capable of degrading the low-molecular-weight polycyclic aromatic hydrocarbons (PAHs), naphthalene or phenanthrene, as a sole carbon source. Characterization of the enrichment cultures by 16S rDNA analysis …
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Genome scale metabolic reconstruction and hypothesis testing in the methanogenic archaeon Methanosarcina acetivorans C2A
Methanosarcina acetivorans strain C2A is a marine methanogenic archaeon notable for its substrate utilization, genetic tractability, and novel energy conservation mechanisms. To help probe the implications of this organism’s unique metabolism, we have constructed and manually curated a genome-scale …
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In Vitro Methanogenesis From Formaldehyde. Identification of Three Carbon-1 Intermediates of the Methanogenic Pathway
… This enzyme was proposed to be part of the methanogenic pathway. Initial purification of the enzyme was reported. Component A(,2) of the methylreductase system was involved in the conversion of HCHO to CH(,4) under H(,2). Initial purification of this enzyme was documented. HCHO, …
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Expanding the genetic toolbox for methanogenic archaea and investigating ferredoxin redox circuit formation in Methanosarcina acetivorans
Methane-producing archaea (methanogens) occupy a number of anoxic niches from soil sediments to the gastrointestinal tracts of numerous animals. In these anaerobic environments methanogens have specialized in converting simple substrates like carbon dioxide (CO2), formate, and acetate to methane …
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Molecular ecological analysis of methanogenic communities in terrestrial and submarine permafrost deposits of Siberian Laptev Sea area
… global climate change, little is known about the methanogenic microorganisms in permafrost sediments, their role in methane emissions, and their phylogeny. The aim of this thesis was to increase knowledge of uncultivated methanogenic microorganisms in submarine and terrestrial permafrost deposits, …
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Syntrophic saturated fatty acid-oxidizing bacteria and their phylogeny: An extremely thermophilic, methanogenic bacterium and its plasmid
Made available in DSpace on 2011-05-07T12:01:43Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9136780.pdf: 3097710 bytes, checksum: 09d6430e9dac482d2f6987198b0b5a2a (MD5) Previous issue date: 1991
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Investigating the Distribution and Biosynthesis of Modified F<sub>430</sub> Cofactors in Methanogenic and Methanotrophic Archaea
… production of methane and is utilized by methanogenic archaea (methanogens) to generate energy. This process is responsible for 70% of total atmospheric methane, a potent greenhouse gas and an important energy source (natural gas). In the future, reversing methanogenesis in an engineered …
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Novel Electron Transfer Systems in Hyperthermophilic Methanogenic and Anaerobic Methanotrophic Archaea: F420-dependent Nitrite Reductase and [Fe-S] Cluster Assembling Thioredoxin
Methanogens produce methane as the end-product of their energy respiration, and these microbes can be found in various anaerobic environments. Their metabolisms and unique enzymes have continually expanded the boundaries of our knowledge about microbial energy conservation and opened the potential …
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Insights into Adaptations of Biogas-Producing Microbial Communities from Taxonomic Profiling, Metagenomically Assembled Genomes and Analysis of the Methanogenic Isolate Methanothermobacter wolfeii SIV6
Biogas is an important renewable energy source in Germany. However, in the course of the German energy transition and for political and economic reasons, biogas plants must become more flexible with regard to varying residue-based substrates and thus changing process conditions, while ensuring a …
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Bioremediation of Pcb Contaminated Surface Soil: A Microcosm Study
… serum bottle microcosms containing aceticlastic methanogenic consortium, enriched from a municipal anaerobic digester. Two different experiments, "intermediate feed" and "starve and feed" were conducted by manipulating the methanogenic consortium with different amounts of acetate feeding, during …
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Effect of High Shear on Anaerobic Digestion in an Anaerobic Membrane Bioreactor (Anmbr) Treating High Strength Wastewater
… hydrogen-producing syntrophic bacteria and their methanogenic partners, (ii) increased hydrolysis rates, or (iii) prevention of growth of methanogenic zones required for methane conversion. The objective of this study was to evaluate if and to what extent high shear in AnMBRs can decrease reactor …
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