A5077849600- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Biofuel production and bioconversion
- Enzyme Production and Characterization
- Microbial Metabolic Engineering and Bioproduction
- Methane Hydrates and Related Phenomena
- Microbial bioremediation and biosurfactants
- Microbial Metabolites in Food Biotechnology
- Enzyme Catalysis and Immobilization
- Microbial Fuel Cells and Bioremediation
- Toxic Organic Pollutants Impact
- Enzyme Structure and Function
- Food composition and properties
- Bacteriophages and microbial interactions
- Wastewater Treatment and Nitrogen Removal
- Drilling and Well Engineering
- Metabolomics and Mass Spectrometry Studies
- Anaerobic Digestion and Biogas Production
- Environmental remediation with nanomaterials
- Metal Extraction and Bioleaching
- Offshore Engineering and Technologies
- Reservoir Engineering and Simulation Methods
- Photosynthetic Processes and Mechanisms
- Microbial metabolism and enzyme function
- Biochemical and biochemical processes
University of Georgia
2011-2024
Kasetsart University
2023
Royal GD (Netherlands)
2023
University of Sassari
2023
Ghent University
2023
Tianjin Institute of Industrial Biotechnology
2012
Chinese Academy of Sciences
2012
University of Georgia
2007
Roger Williams University
2004
Carl von Ossietzky Universität Oldenburg
2004
Diverse microbial communities and numerous energy-yielding activities occur in deeply buried sediments of the eastern Pacific Ocean. Distributions metabolic often deviate from standard model. Rates activities, cell concentrations, populations cultured bacteria vary consistently one subseafloor environment to another. Net rates major principally rely on electron acceptors donors photosynthetic surface world. At open-ocean sites, nitrate oxygen are supplied deepest sedimentary through...
Under anaerobic conditions, microbial reductive dechlorination of polychlorinated biphenyls (PCBs) occurs in soils and aquatic sediments. In contrast to supplemented single congeners for which frequently ortho has been observed, mainly attacks meta and/or para chlorines PCB mixtures contaminated sediments, although a few instances PCBs observed. Different microorganisms appear be responsible different activities the occurrence various dehalogenation routes. No axenic cultures an...
An organism that is able to reductively ortho-dechlorinate 2,4-dichlorophenol and 3-chloro-4-hydroxyphenylacetate (3-C1-4-OHPA) was isolated from a methanogenic lake sediment. This organism, an anaerobic, motile, Gram-type-positive, rod-shaped bacterium, grew in the presence of 0.1% yeast extract when pyruvate, lactate, formate, or hydrogen used as electron donor for reductive dehalogenation 3-C1-4-OHPA. Sulfite, thiosulfate, sulfur were reduced sulfide, nitrate nitrite, fumarate succinate....
ABSTRACT Glycerol dialkyl glycerol tetraethers (GDGTs) are core membrane lipids of the Crenarchaeota . The structurally unusual GDGT crenarchaeol has been proposed as a taxonomically specific biomarker for marine planktonic group I archaea. It is found ubiquitously in water column and sediments. In this work, samples microbial community biomass were obtained from several alkaline neutral-pH hot springs Nevada, United States. Lipid extracts these analyzed by high-performance liquid...
Clostridium thermocellum JW20 (ATCC 31549), which was isolated from a Louisiana cotton bale, grew on cellulose, cellobiose, and xylooligomers and, after adaptation, glucose, fructose, xylose in the pH range of 7.5 to 6.1 with T opt 60�C, max 69�C, min above 28�C. Doubling times during growth cellulose cellobiose were 6.5 2.5 h, respectively. The G+C content DNA 40 mol% (chemical analysis). Growth as substrate totally inhibited presence more than 125 mM sodium sulfate, 300 chloride, 250...
ABSTRACT Despite the ubiquity of ammonium in geothermal environments and thermodynamic favorability aerobic ammonia oxidation, thermophilic ammonia-oxidizing microorganisms belonging to crenarchaeota kingdom have only recently been described. In this study, we analyzed microbial mats surface sediments from 21 hot spring samples (pH 3.4 9.0; temperature, 41 86°C) United States, China, Russia obtained 846 putative archaeal monooxygenase large-subunit ( amoA ) gene transcript sequences,...
2,4-Dichlorophenol (2,4-DCP) was anaerobically degraded in freshwater lake sediments. From observed intermediates incubated sediment samples and from enrichment cultures, the following sequence of transformations postulated. 2,4-DCP is dechlorinated to 4-chlorophenol (4-CP), 4-CP phenol, phenol carboxylated benzoate, benzoate via acetate methane CO2; at least five different organisms are involved sequentially. The rate-limiting step transformation phenol. Sediment-free cultures were obtained...
Thirteen strains of a strict anaerobic, extreme thermophilic bacterium were isolated from soil samples moderate temperature, sewage plant in Georgia, and hot springs Utah Wyoming. They identified as Clostridium thermohydrosulfuricum. The guanosine + cytosine content (moles percent) was 37.6 (determined by buoyant density) 34.1 melting temperature). All required factor present yeast extract or tryptone growth. Growth characteristics follows: pH range 5 to 9, with the optimum between 6.9 7.5,...
A strain of a thermophilic, anaerobic, dissimilatory, Fe(III)-reducing bacterium, Thermoterrabacterium ferrireducens gen. nov., sp. nov. (type JW/AS-Y7T; DSM 11255), was isolated from hot springs in Yellowstone National Park and New Zealand. The gram-positive-staining cells occurred singly or pairs as straight to slightly curved rods, 0.3 0.4 by 1.6 2.7 μm, with rounded ends exhibited tumbling motility. Spores were not observed. temperature range for growth 50 74°C an optimum at 65°C. pH...
Three strains of an anaerobic thermophilic organoheterotrophic lipolytic alkalitolerant bacterium, Thermosyntropha lipolytica gen. nov., sp. nov. (type strain JW/VS-265T; DSM 11003), were isolated from alkaline hot springs Lake Bogoria (Kenya). The cells nonmotile, non-spore forming, straight or slightly curved rods. At 60°C the pH range for growth determined at 25°C [pH25°C] was 7.15 to 9.5, with optimum between 8.1 and 8.9 (pH60°C 7.6 8.1). a pH25°C 8.5 temperature 52 70°C, 60 66°C....
Abstract Bacterial microorganisms that grow optimally at Na + concentrations of 1.7 M, or the equivalent 10% (w/v) NaCl, and greater are considered to be extreme halophiles. This review focuses on correlation between extent alkaline pH elevated temperature optima salt tolerance extremely halophilic eubacteria; focus is those with optima, above 8.5, 50°C. If all three conditions required for optimal growth, these termed "poly-extremophiles". However, only a very few halophiles able under as...
The thermophilic, cellulolytic, anaerobic bacterium 'Anaerocellum thermophilum' strain Z-1320 was isolated from a hot spring almost two decades ago and deposited in the German Collection of Microorganisms Cell Cultures (DSMZ) as DSM 6725. organism classified representing new genus, 'Anaerocellum', primarily on its growth physiology, cell-wall type morphology. results recent physiological studies phylogenetic genome sequence analyses 6725 'A. obtained DSMZ showed that properties differed...
Novel halophilic, alkalithermophilic, Gram-type-positive bacterial strains were isolated from sediment of alkaline, hypersaline lakes the Wadi An Natrun, Egypt. Cells strain JW/NM-WN-LFT rod-shaped, non-spore-forming and non-motile. Strain grew (at pH55 degrees C 9.5) between 35 56 C, with an optimum at 53 C. The range for growth was 8.3-10.6, 9.5 no 8.2 or below, 10.8 above. At pH temperature, in Na+ 3.1-4.9 M (1.5-3.3 added NaCl) optimally 3.3 3.9 (1.7-2.3 NaCl). utilized fructose,...