Journal Article Prevalence and antimicrobial susceptibility of thermophilic Campylobacter in organic conventional broiler flocks Get access O.E. Heuer, Heuer Danish Veterinary Laboratory, Department Poultry, Fish Fur Animals, ÅrhusDepartment Microbiology, Royal Agricultural University, Frederiksberg, Denmark Dr Hangøvej 2, DK‐8200 Århus N, (e‐mail: oeh@svs.dk). Search for other works by this author on: Oxford Academic Google Scholar K. Pedersen, Pedersen J.S. Andersen, Andersen Zoonosis...

Deep subterranean granitic aquifers have not been explored regarding methanogens until now. Three autotrophic methane-producing Archaea were isolated from deep groundwater at depths of 68, 409 and 420 m. These organisms non-motile, small, thin rods, 0·1-0·15 μm in diameter, they could use hydrogen carbon dioxide or formate as substrates for growth methanogenesis. One the isolates, denoted A8p, was studied detail. It grew with a doubling time 2·5 h under optimal conditions (20–40 °C, pH...

The dynamics of microbial growth in metal-working fluids (MWF) and the effect addition biocides were studied large fluid systems, this case, one central tank which holds 150 m3. In system, populations Pseudomonas pseudoalcaligenes (greater than 10(8) CFU/ml) sustained for a year, although quantities added. Quantitation 3-OH lauric acid, marker many spp., by gas chromatography indicated that bacterial biomass exceeded viable counts approximately 15 times. Fungi grown on several occasions,...

Summary: The 16S rRNA gene of Gallionella feiruginea was amplified by polymerase chain reaction and sequenced direct double-stranded sequencing. phylogenetic analysis placed G. in the -group Proteobacteria, with 90.0% similarity to Nitrosolobus multiformis 88.6% Rhodocyclus purpureas. published phenotypic characteristics ferruginea were compiled supplemented growth experiments using ferrous iron, thiosulphate sulphide as electron donor, nitrate nitrogen source. is a Gram-negative, curved...

The growth of Gallionella ferruginea in a mineral salts solution with carbon dioxide and iron sulphide was studied by acridine orange stained direct count most probable number techniques. G. grew to 2 × 106 cells ml−1 generation time 8·3 h under aerobic gradient conditions. optimum temperature for 20 °C. No obtained anaerobic conditions, or without dioxide. A method developed measuring the length stalks formed ferruginea. When growing exponentially, bacterium freeliving, stalks, motile one...

Abstract. The Collisional Orogeny in the Scandinavian Caledonides (COSC) scientific drilling project focuses on mountain building processes a major mid-Palaeozoic orogen western Scandinavia and its comparison with modern analogues. investigates subduction-generated Seve Nape Complex. These part under ultra-high-pressure conditions metamorphosed outer continental margin continent–ocean transition zone assemblages were emplaced onto Baltoscandian platform there influenced underlying...

Abstract The high fuel efficiency of natural gas makes it an attractive alternative to coal and oil during the transition towards renewable energy resources. Natural engines are needed ensure a stable power grid that can accommodate fluctuations in production. Unfortunately, these emit as much 3–4 % methane (CH 4 ) under learn‐burn conditions. This slip has environmental cost since CH is potent greenhouse gas. Complete catalytic oxidation potentially control emission. best performing Pd/Al 2...

A sulfate-reducing bacterium, strain Aspo-2, was isolated from granitic groundwater sampled at a depth of 600 m. This and other strains SRB frequently occur in the deep rock aquifers studied. On basis its morphological, physiological genotypical properties, unique habitat, we propose Aspo-2 as new species genus Desulfovibrio, Desulfovibrio aespoeensis (DSM 10631T).

Aim: The fate of micro‐organisms in the bentonite clay surrounding high‐level radioactive waste (HLW)‐containing copper canisters a future Swedish underground (500 m) repository were investigated. Methods and Results: Laboratory experiments designed which mixing various bacterial species with swelling was studied. A clear trend fewer cultivable bacteria at depth seen clay. This consistent as incubation time increased from 8 h to 28 weeks. Sulphate‐reducing found be active, reducing sulphate...

To investigate the relationships between sulfate-reducing bacteria (SRB), growth conditions, bentonite densities and copper sulfide generation under circumstances relevant to underground, high-level radioactive waste repositories.Experiments took place 450 m connected in situ pressure groundwater containing SRB. The microbial reduction of sulfate subsequent corrosion test plates buried compacted were analysed using sulfur (35SO4(2-)) as tracer. Mass distribution on indicated a diffusive...

In this work, a model for the nitrogen chemistry in oxy-fuel combustion of pulverized coal has been developed. The is chemical reaction engineering type with detailed mechanism gas-phase chemistry, together simplified description mixing flows, heating and devolatilization particles, gas–solid reactions. validated by comparison entrained flow reactor results from present work literature on O2/CO2 air, covering effects fuel, conditions, temperature, stoichiometry, inlet NO level. general,...

The evolution of deepfake technology has the potential to reshape threat landscape in corporate environments by enabling highly convincing digital impersonations. In this paper, we explore how artificial media produced AI can be misused assume authoritative personas, leaving traditional cybersecurity programs with significant vulnerabilities. Drawing from interviews professionals across various industries, find that majority organizations remain vulnerable due their adoption broad,...

The ash behavior during suspension firing of 12 alternative solid biofuels, such as pectin waste, mash from a beer brewery, or waste cigarette production have been studied and compared to wood straw behavior. Laboratory tests were performed on an entrained flow reactor swirl burner test rig, with special emphasis the formation fly deposit. Thermodynamic equilibrium calculations support interpretation experiments. To generalize results combustion tests, fuels are classified according fuel...

The interaction between alkali chloride and sulfur oxides has important implications for deposition corrosion in combustion of biomass. In the present study, sulfation particulate KCl (90–125 μm) by SO2 was studied a fixed bed reactor temperature range 673–1023 K with reactant concentrations 500–3000 ppm SO2, 1–20% O2, 4–15% H2O. degree monitored measuring formation HCl. Analysis solid residue confirmed that reaction proceeds according to shrinking core model showed an eutectic at higher...

This paper presents and compares the assimilation rates of CO2 lactate, lactate respiration rates, attached bacterial populations growing in slowly flowing groundwater (1-3 mm s-1) from deep crystalline bed-rock Stripa research mine, Sweden. The bacteria studied grew anoxic, high-pH (9-10) low-redox artesian up through tubing two levels a borehole designated V2, 812-820 m 970-1240 below ground. Bacteria were allowed to attach grow on sterile glass microscope slides laminar-flow reactors...

As feral swine continue to expand their geographical range and distribution across the United States, involvement in crop damage, livestock predation, pathogen transmission is likely increase. Despite relatively recent discovery of aetiology a variety pathogens, propensity transmit carry wide pathogens disconcerting. We examined sera from 2055 for antibody presence six serovars Leptospira that can also infect humans, or domestic animals. About 13% all samples tested positive at least one...

Granitic rock has aquifers that run through faults and single or multiple fracture systems. They can orientate any way, vertically horizontally usually, only parts of hard fractures are water conducting. The remaining filled by coatings precipitated minerals, clay gouge material. Sampling is difficult the risk contamination due to intrusion drilling fluids cuttings in obvious. A recent investigation potential for boreholes granite during operations, using molecular growth methods, showed...

ABSTRACT The initial development and diversity of an in situ subsurface microbial community producing bacteriogenic iron oxides (BIOS) were investigated at the initiation biofilm growth (2‐month period) after a 1‐year period undisturbed growth. Water chemistry data, samples encrusted material groundwater collected from BRIC (BIOS reactor, , continuous flow) apparatuses installed 297 m below sea level Äspö Hard Rock Laboratory (HRL) south eastern Sweden. Comparisons between BIOS system...