From the silty sediments of the Khadyn soda lake (Tuva), a binary sulfidogenic bacterial association capable of syntrophic acetate oxidation at pH 10.0 was isolated. An obligately syntrophic, gram-positive, spore-forming alkaliphilic rod-shaped bacterium performs acetate oxidation in a ...

Sulfurihydrogenibium azorense, sp. nov., a thermophilic hydrogen-oxidizing microaerophile from 2W1 Five hydrogen-oxidizing, thermophilic, strictly chemolithoautotrophic, microaerophilic strains, with the exception of `Hydrogenobacter subterraneus', are chemolithoautotrophic, microaerophilic, thermophilic

Aerobic biodegradation of aromatic hydrocarbons has been well studied. Under aerobic conditions, aerobes or facultative anaerobes can utilize aromatic hydrocarbons as sole carbon and energy sources by using oxygen as the cosubstrate of oxygenase enzymes for the initial attack of the aromatic ring and as the terminal electron acceptor for aerobic respiration. However, some facultative or ...

A symbiotic thermophilic bacterium, strain SC-1, was isolated from hay compost (toebi) in Korea. The new isolate exhibited an obligate commensal interaction with a thermophilic Geobacillus strain and required crude extracts and/or culture supernatant from Geobacillus sp. SK-1 for axenic growth. The growth factors from Geobacillus sp. SK-1 were irreversibly inactivated by ...

Stenoxybacter acetivorans is a newly described, obligately microaerophilic ?-proteobacterium that is abundant in the acetate-rich hindgut of Reticulitermes. Here we tested the hypotheses that cells are located in the hypoxic, peripheral region of Reticulitermes flavipes hindguts and use acetate to fuel their O₂-consuming respiratory ...

Sep 15, 2011 ... The physiological and microbial diversity studies focus on the ... acetate oxidizers of the family Desulfobacteriaceae within the delta ...

The obligately aerobic soybean root nodule bacterium Rhizobium japonicum produces large amounts of heme (iron protoporphyrin) only under low oxygen tensions, such as exist in the symbiotic root nodule. Aerobically incubated suspensions of both laboratory-cultured and symbiotic bacteria (bacteroids) metabolize delta-aminolevulinic acid to uroporphyrin, coproporphyrin, and ...

The ammonia-oxidizing bacterial community (AOB) was investigated in two types of laboratory-scale bioreactors performing partial oxidation of ammonia to nitrite or nitrate at high (80�mM) to extremely high (428�mM) concentrations of ammonium bicarbonate. At all conditions, the dominant AOB was affiliated to the Nitrosomonas europaea lineage as was determined by fluorescence in situ ...

In termite hindguts, fermentative production of acetate�a major carbon and energy source for the insect�depends on efficient removal of inwardly diffusing oxygen by microbes residing on and near the hindgut wall. However, little is known about the identity of these organisms or about the substrate(s) used to support their respiratory activity. A cultivation-based approach was used to isolate ...

Description of Work: Collection of protozoa from various anaerobic and microaerophilic sedimentary environments. Members Involved: Virginia Edgcomb ( MBL) ...

A novel obligately organotrophic, facultatively microaerophilic spirillum, designated strain D-427(T), was isolated from sulfidic sludge of a municipal wastewater-treatment plant. Cells were Gram-negative, large and highly motile due to bipolar tufts of flagella covered with mucous sheaths. Coccoid cells were sometimes formed. Strain D-427(T) grew ...

The oxidation of acetate to hydrogen, and the subsequent conversion of hydrogen and carbon dioxide to methane, has been regarded largely as a niche mechanism occurring at high temperatures or under inhibitory conditions. In this study, 13 anaerobic reactors and sediment from a temperate anaerobic lake were surveyed for their dominant methanogenic population by using fluorescent in situ ...

Kinetic parameters of acetate oxidation were determined for the sulfate reducers Desulforhabdus amnigenus and Desulfobacca acetoxidans. Based on these parameters, both sulfate reducers seem to be able to outcompete Methanosaeta spp. for acetate in acetate-fed anaerobic bioreactors. Mixed-substrate studies showed that D. amnigenus degraded acetate and ...

... rods, heavy probable Bacteroides species, light probable microaerophilic streptococcus, light alpha-streptococcus, and heavy Fusobacterium species. The ... ...

Description of Work: Collection of protozoa from various anaerobic and microaerophilic sedimentary environments. Members Involved: Virginia Edgcomb ( MBL) ...

Description of Work: Collection of protozoa from various anaerobic and microaerophilic sedimentary environments. Members Involved: Virginia Edgcomb ( MBL) ...

... July 27, 2001Keywords: Campylobacter, PCR, rapid detection, hatchery Campylobacter jejuni, a gram-negative, microaerophilic bacteria, is presently believed ... ...

Loihi Seamount is Hawaii's youngest volcano and one of the earth's most active. Loihi is located 30 km SE of the big island of Hawaii and rises over 3000m above the sea floor and summits at 1100m below sea level. An eruption in 1996 of Loihi led to the formation of Pele's Pit, a 300 meter deep caldera. The current observations have revealed diffuse hydrothermal venting causing low to intermediate ...

Four thermophilic, sulfur-oxidizing, chemolithoautotrophic strains with >99 % 16S rRNA gene sequence similarity were isolated from terrestrial hot springs in the Geyser Valley and the Uzon Caldera, Kamchatka, Russia. One strain, designated UZ3-5T, was characterized fully. Cells of UZ3-5T were Gram-negative, motile, slightly oval rods (about 0.7 microm wide and 1.0 microm long) with multiple ...

A mechanistic approach is presented to describe oxidation of the greenhouse gas methane in the rice rhizosphere of flooded paddies by obligate methanotrophic bacteria. In flooded rice paddies these methanotrophs compete for available O₂ with other types of bacteria. Soil incubation studies and most-probable-number (MPN) counts of oxygen consumers show ...

Bacterial strains CVO and FWKO B were isolated from produced brine at the Coleville oil field in Saskatchewan, Canada. Both strains are obligate chemolithotrophs, with hydrogen, formate, and sulfide serving as the only known energy sources for FWKO B, whereas sulfide and elemental sulfur are the only known electron donors for CVO. Neither strain uses thiosulfate as an energy ...

A sandstone aquifer beneath a petrochemicals plant (SIReN site, UK) is heterogeneously contaminated with benzene and oxygen-depleted. Despite low redox potentials in three of the most contaminated groundwaters (benzene concentrations from 17.8 to 294 mg L(-1)), we observed aerobic benzene degradation in microcosms, indicating the presence in situ of a latent community of ...

We present the genome of Mariprofundus ferrooxydans PV-1, the first cultured representative in the novel candidatus class Zetaproteobacteria to date. Isolated from iron mats in 1,100m depth at the Loihi Seamount, Hawai�i, M. ferrooxydans is known as a microaerophilic, obligate iron oxidizer. Its most striking feature is the formation of a highly ...

We have investigated the evolutionary relationships between two facultatively anaerobic Magnetospirillum strains (AMB-1 and MGT-1) and fastidious, obligately microaerophilic species, such as Magnetospirillum magnetotacticum, using a molecular phylogenetic approach. Genomic DNA from strains MGT-1 and AMB-1 was used as a template for amplification of the ...

The purpose of this study was to develop a multipurpose incubator, without the gas cylinders (bottles) which are required for H2 and CO2 supplementation. In our bottle-free multipurpose incubator, the H2 and CO2 were generated by chemical reactions induced within the chamber. The reaction between sodium borohydride and acetic acid at a molar ratio of 1:1 was used to generate H2, according to the ...

Investigation of antigenic determinants of the microaerophilic obligate intracellular bacterium Lawsonia intracellularis using a mass spectrometry approach identified a novel bacterial protein present in an extract of cell culture medium aspirated from heavily infected in vitro cell cultures. Western immunoblotting analysis of SDS-PAGE-resolved proteins ...

...payment of all of its current obligations, including direct obligations, coming...fully meet all of its current obligations, including direct obligations, due...fully meet all of its current obligations, including direct obligations,...

... We analyzed funds obligated and vouchers submitted by the ... 63 obligations, selected invoices, and approximately 400 voucher payments made ...

A thermophilic, fermentative microaerophile (ET-5b) and a thermophilic acetogen (ET-5a) were coisolated from oxic soil obtained from Egypt. The 16S rRNA gene sequence of ET-5a was 99.8% identical to that of the classic acetogen Moorella thermoacetica. Further analyses confirmed t...

interrelationships of these isolates are described here. Keywords Thermophiles � Aquificales � 16S rRNA � ITS � aclB Introduction The Aquificales are a group of thermophilic, chemo- lithotrophic and microaerophilic bacteria azorense, sp. nov., a thermophilic hydrogen-oxidizing microaerophile from terrestrial hot springs

... REVIEW OF CURRENT REGULATORY OBLIGATIONS AND PRACTICES AS EXPERIENCED BY A SPECIALTY CHEMICALS PRODUCER IN THE ...

... requirements. The first section of this report will detail the US obligations under these international agreements. Descriptors ...

seller Contract Compliance Checker Timeouts Primitive Events Rights Obligs Prohibs Rights Obligs Prohibs

...2010-07-01 false How are the Renewable Volume Obligations calculated? 80.1407 ...Standard § 80.1407 How are the Renewable Volume Obligations calculated? (a) The Renewable Volume Obligations for an obligated party are...

...such notification to employees. The employer is obligated to translate this notice in any situation in which it is obligated to do...failure to meet these obligations. The employer is obligated to translate this notice in any situation in which it is obligated...

Anaerobic degradation of protein-rich material results in the release of ammonium. An increase in levels of ammonium in biogas reactors usually results in less effective degradation and lower methane-formation rates for two reasons: Acetate-utilizing meth...

To quantify the contribution of syntrophic acetate oxidation to thermophilic anaerobic methanogenesis under the stressed condition induced by acidification, the methanogenic conversion process of 100 mmol/L acetate was monitored simultaneously by using isotopic tracing and selective inhibition techniques, supplemented with the analysis of unculturable ...

Acetate concentrations and rates of acetate oxidation and sulfate reduction were measured in S. alterniflora sediments in New Hampshire and Massachusetts. Pore water extracted from cores by squeezing or centrifugation contained in greater than 0.1 mM acet...

Campylobacter spp. require a microaerophilic environment (80% N(2), 10% CO(2), 5% H(2), and 5% O(2)) for growth. Since the late 1800s, several systems for creating and maintaining specific microbial atmospheres have been developed and applied. The objective of this study was to evaluate Campylobacter jejuni growth by means of 3 commonly used gas-delivery systems for generating ...

Acetate utilization in sulfidogenic fluidized-bed reactors (FBRs) was investigated for the treatment of iron containing wastewater at low (8 degrees C) and high (65 degrees C) temperatures. The FBRs operated at low and high temperatures were inoculated with cultures of sulfate-reducing bacteria (SRB) originally enriched from arctic and hot mining environments, respectively. Acetate was not ...

A high number (from tens of thousands to millions of CFU/g of soil) of actinomycetes and a high diversity of genera were found in typical peat and agropeat soils. Agricultural use increases the number and diversity of the actinomycete complexes of the peat soils. In the peat soils, the actinomycete complex is represented by eight genera: Streptomyces, Micromonospora, Streptosporangium, ...

The Loihi Seamount, located 30 km SE of the island of Hawai'i, is among the most active volcanos on Earth. The summit, at a depth of 1100m, includes a 250m deep caldera (Pele's Pit) formed by an eruption in 1996. The summit, and especially Pele's Pit, are the site of extensive low to intermediate temperature (10� to 65�C) hydrothermal venting, emanating both from diffuse fissures and orifices ...

A number of hydrothermal vent sites exist on the summit of the Loihi Seamount, a shield volcano that is part of the Hawaiian archipelago. The vents are 1,100 to 1,325 m below the surface and range in temperature from slightly above ambient (10�C) to high temperature (167�C). The vent fluid is characterized by high concentrations of CO₂ (up to 17 mM) and Fe(II) (up to 268 ...

Diverse aerobic, lithotrophic Fe-oxidizing bacteria (FeOB) produce distinctive extracellular Fe-rich filaments, which resemble putative Fe microfossils dating from recent to 1.7 Ga (Slack et al., 2007, EPSL: 243). The filament morphology, texture, and composition are promising biosignatures for these FeOB; however, somewhat similar morphologies have been shown to result from chemical precipitates. ...

Radionuclide transport experiments conducted in a large, meso-scale column reactor (MSCR, 10 ft high x 3 ft dia) operated under unsaturated flow conditions with simulated rainwater influent provide evidence that microbial iron reduction can occur in bulk-aerobic vadose zone systems with a low organic carbon content (~0.5 wt%). Soil gas analyses indicate that CO2 varied between ~0.1% of soil gas ...

... of Obligate, Grassland Birds to Landscape Structure in Wisconsin Murray, L. D., Ribic, C. A., and Thogmartin, ... of Obligate, Grassland Birds to Landscape Structure in Wisconsin: Journal of ...

Failure to record obligations and adjustments in a timely manner ... The audit objective was to determine whether obligations and adjustments to ...

The main purpose of this study is to question the relation between consenting and being obligated. Topics covered include: An Idea of Consent and the Range of Obligation; Conditions of Consent -- Freedom, Information, Capacity, Conditions versus principle...

The human pathogen Campylobacter jejuni is considered a microaerophile, yet it has been shown to grow in vitro under atmospheres with elevated oxygen tensions. Hence, a better understanding of the oxygen requirement and tolerance of C. jejuni is required. Bacterial growth was measured under various ...

Members of the genus Anaeromyxobacter are versatile, facultative microaerophilic myxobacteria isolated from soils, aquifers and freshwater sediments. Anaeromyxobacter spp. grow with nitrate as electron acceptor, which is reduced via nitrite to ammonia. Interestingly, the analysis of the Anaeromyxo...

... fully aerated, whereas deeper areas are anoxic with high concentrations of sulfide. The chemocline is usually very well ... our opinion a much likelier scenario, especially considering high sulfide concen...

Campylobacter spp. are microaerophilic and capnophilic microorganisms. Methods to increase exposure of Campylobacter to appropriate microaerobic conditions could theoretically improve recovery of stressed cells. The porous nature of a sponge greatly increases the sample surface area exposed to mic...

Two column tests were conducted using aquifer material to simulate the nitrate field demonstration project carried out earlier at Traverse City, Michigan. The objectives were to better define the effect nitrate addition had on biodegradation of benzene, t...

Two column tests were conducted using aquifer material to simulate the nitrate field demonstration project carried out earlier at Traverse City, Michigan. The objectives were to better define the effect nitrate addition had on biodegradation of benzene, t...

Two column tests were conducted using aquifer material to simulate the nitrate field demonstration project carried out earlier at Traverse City, Michigan. The objectives were to better define the effect nitrate addition had on biodegradation of benzene, toluene, ethylbenzene, xyl...

The complete biodegradation of azo dye, Fast Acid Red GR, was observed under microaerophilic conditions by Shewanella decolorationis S12. Although the highest decolorizing rate was measured under anaerobic condition and the highest biomass was obtained under aerobic condition, a further biodegradation of decolorizing products can only be achieved under ...

Agromyces ramosus is a microaerophilic to aerobic actinomycete that is present in high numbers in soil. It is typically found as a coccoid-rod in soil. Upon growth initiation, it forms a branched mycelium which subsequently fragments into coccoid and dipt...

The Augmented In Situ Subsurface Bioremediation Process� developed by BIO-REM, Inc., uses microaerophilic bacteria and micronutrients (H-10) and surface tension depressants/penetrants for the treatment of hydrocarbon contaminated soils and groundwater. The bacteria utilize hydroc...

heterotrophic, aerobic, anaerobic, and microaerophilic bacteria or actinomycetes ..... plate count of soil bacteria. (Ref. 4). It contains organics ...

A case of thoracic mass infiltrating the chest wall mimicking a pulmonary invasive neoplasm is reported. Differential diagnosis and characteristic radiological and histological imaging had a decisive role in the case management. Actinomycosis is caused by a gram-positive, filamentous, microaerophilic bacteria. About 15% of the infections caused by Actinomyces involve the ...

The purple nonsulfur bacterium Rhodospirillum rubrum has been employed to study physiological adaptation to limiting oxygen tensions (microaerophilic conditions). R. rubrum produces maximal levels of photosynthetic membranes when grown with both succinate and fructose as carbon sources under microaerophilic conditions in comparison to the level (only about ...

...obligations under loan guarantees. 1717.1207 Section...obligations under loan guarantees. Nothing in this subpart...obligations of RUS under loan guarantee commitments it has made to the Federal Financing Bank or other...

... Certain payments by the Government of Sudan of obligations to persons within the United... Certain payments by the Government of Sudan of obligations to persons within the United...payment of obligations of the Government of Sudan to persons or accounts within the...

...candidate's outstanding campaign obligations. (1...contributions shall be deemed monies available to pay outstanding campaign obligations as of the...statement of net outstanding campaign obligations. (2) The amount of money deemed available...