A5070525327- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Genomics and Phylogenetic Studies
- CO2 Sequestration and Geologic Interactions
- Hydrocarbon exploration and reservoir analysis
- Enhanced Oil Recovery Techniques
- Bacteriophages and microbial interactions
- Microbial Fuel Cells and Bioremediation
- Aquaculture disease management and microbiota
- Groundwater flow and contamination studies
- Advanced Numerical Methods in Computational Mathematics
- Hydraulic Fracturing and Reservoir Analysis
- Computational Fluid Dynamics and Aerodynamics
- Protist diversity and phylogeny
- Metal Extraction and Bioleaching
- Carbon Dioxide Capture Technologies
- Evolution and Genetic Dynamics
- Aquaculture Nutrition and Growth
- Atmospheric and Environmental Gas Dynamics
- Reservoir Engineering and Simulation Methods
- Identification and Quantification in Food
- Gas Dynamics and Kinetic Theory
- Marine Bivalve and Aquaculture Studies
- Wastewater Treatment and Nitrogen Removal
- Water Quality Monitoring Technologies
University of Bergen
2016-2025
Princeton University
1998
Current macroscopic theories of two-phase flow in porous media are based on the extended Darcy's law and an algebraic relationship between capillary pressure saturation. Both these equations have been challenged recent years, primarily theoretical works using a thermodynamic approach, which led to new governing for media. In equations, terms appear related fluid–fluid interfacial area non-equilibrium capillarity effects. Although there has growing number experimental aimed at investigating...
Capillary pressure plays a central role in the description of water flow unsaturated soils. While capillarity is ubiquitous analyses, theoretical basis and practical implications soils remain poorly understood. In most traditional treatments capillary pressure, it defined as difference between pressures phases, this case air water, assumed to be function saturation. Recent theories have indicated that should given more general thermodynamic definition, its functional dependence generalized...
A novel anaerobic, moderately thermophilic bacterium, strain Cas60314 T , was isolated from hot oil-well production water obtained an oil reservoir in the North Sea. The cells were Gram-negative, motile, straight rods. salinity and pH growth optima 2.0–3.0 % NaCl 6.5–7.0, respectively. optimum temperature 58 °C. Strain had a fermentative type of metabolism utilized proteinous substrates, some single amino acids limited number organic acids, but not sugars, fatty or alcohols. Cystine...
A novel thermophilic, heterotrophic bacterium, strain TBF 19.5.1T, was isolated from oil production fluid at the Troll B platform in North Sea. Cells of 19.5.1T were non-motile rods with a sheath-like structure, or toga. The Gram-negative and grew 20–80 °C (optimum 65 °C), pH 5.5–8.0 6.8) NaCl concentrations 10–60 g l−1 25–30 l−1). For member order Thermotogales, isolate is capable unprecedented growth low temperatures, an optimal doubling time 175 min (specific rate 0.24 h−1) final optical...
This paper investigates vertically integrated equilibrium models for CO 2 storage. We pay particular attention to the importance of including effect fine‐scale capillary forces in equations. aspect has been neglected previous work, where fluids are segregated by a sharp interface. Our results show that lead qualitative and quantitative alterations Interestingly, while such dispersive on fine scale, they self‐sharpening solution scale. discuss these aspects injection, leakage, long‐term...
In this study we characterized and sequenced the genome of Arcobacter anaerophilus strain IR-1 isolated from enrichment cultures used in nitrate-amended corrosion experiments. A. could grow lithoautotrophically on hydrogen sulfide lithoheterothrophically thiosulfate elemental sulfur. addition, grew organoheterotrophically yeast extract, peptone, various organic acids. We show for first time that complex substrate tryptone oxidize acetate with sulfur as electron acceptor. Electron acceptors...
Viruses have long been viewed as entities possessing extremely limited metabolic capacities. Over the last decade, however, this view has challenged, genes identified in viruses large genomes and virions-the synthesis of which is energetically demanding. Here, we unveil peculiar phenotypic genomic features Prymnesium kappa virus RF01 (PkV RF01), a giant Mimiviridae family. We found that encodes an unprecedented number proteins involved energy metabolism, such all four succinate dehydrogenase...
Methane seepages typically harbor communities of anaerobic methane oxidizers (ANME); however, knowledge about fine-scale vertical variation ANME in response to geochemical gradients is limited. We investigated microbial sediments below a white mat the G11 pockmark at Nyegga by 16S rRNA gene tag pyrosequencing and real-time quantitative PCR. A stratification dominating was observed 4 cmbsf (cm seafloor) following order: ANME-2a/b, ANME-1 ANME-2c. The community most numerous comprised single...
Methods developed in geochemical modelling combined with recent advances molecular microbial ecology provide new opportunities to explore how communities are shaped by their chemical surroundings. Here, we present a framework for analyses of energy availability shape chemotrophic hydrothermal systems through an investigation two geochemically different basalt-hosted on the Arctic Mid-Ocean Ridge: Soria Moria Vent field (SMVF) and Loki's Castle Field (LCVF). Chemical landscapes were evaluated...
Summary Little is known about how lithoautotrophic primary production connected to microbial organotrophic consumption in hydrothermal systems. Using a multifaceted approach, we analysed the structure and metabolic capabilities within biofilm growing on surface of black smoker chimney L oki's C astle vent field. Imaging revealed presence rod‐shaped B acteroidetes as ectobionts long, sheathed filaments (> 100 μm) affiliated with S ulfurovum genus E psilonproteobacteria . The were composed...
Maintaining pH stability in Recirculating Aquaculture Systems (RAS) is essential, as it has a direct impact on the toxicity of ammonia, CO2, and other metabolite compounds, well efficiency critical processes like nitrification CO2 removal. Alkalinity necessary for inorganic carbon supply to nitrifying bacteria. The relationship between alkalinity, rate, pH, concentration emphasize need determine optimal alkalinity levels RAS. However, consequences operating RAS under non-optimal levels,...
<title>Abstract</title> Giant viruses are extraordinary members of the virosphere due to their structural complexity and high diversity in gene content. Haptophytes ecologically important primary producers ocean, all known that infect haptophytes giant viruses. Our in-depth electron microscopic, phylogenomic virion proteomic analyses two haptophyte-infecting viruses, Haptolina ericina virus RF02 (HeV RF02) Prymnesium kappa (PkV RF02), unravel large capacity for host manipulation arsenals...
Abstract Giant viruses are extraordinary members of the virosphere due to their structural complexity and high diversity in gene content. Haptophytes ecologically important primary producers ocean, all known that infect haptophytes giant viruses. However, little is about specifics infection cycles responses they trigger host cells. Our in-depth electron microscopic, phylogenomic virion proteomic analyses two haptophyte-infecting viruses, Haptolina ericina virus RF02 (HeV RF02) Prymnesium...
Abstract Water–rock interactions in ultramafic lithosphere generate reduced chemical species such as hydrogen that can fuel subsurface microbial communities. Sampling of this environment is expensive and technically demanding. However, highly accessible, uplifted oceanic lithospheres emplaced onto continental margins (ophiolites) are potential model systems for studies the biosphere rocks. Here, we describe a microbiological investigation partially serpentinized dunite from L eka ophiolite (...
Abstract The simulation of multiphase and multicomponent fluid flows often requires the solution large, coupled systems nonlinear partial differential equations convection‐advection type. are usually advection dominated with small but important local diffusive effects. An operator‐splitting technique is used to address these different phenomena. A modified method characteristics try eliminate nonsymmetry in operators due advection. Although this does not completely symmetrize problem...
In order to fully understand the cycling of elements in hydrothermal systems it is critical intra-field variations geochemical and microbiological processes both focused, high-temperature diffuse, low-temperature areas. To reveal important causes effects this variation, we performed an extensive chemical characterization a venting area Loki's Castle Vent Field (LCVF). This area, located at flank large sulfide mound, characterized by numerous chimney-like barite (BaSO4) structures (≤ 1 m...