Results 101 to 110 of about 153 (125)
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Subsurface Petroleum Microbiology
2013The importance of microbial activities in petroleum oilfields and reservoirs has been recognized for a long time, but our knowledge of the diversity of bacteria growing in these ecosystems and their metabolic activities in situ is still limited. Petroleum biotransformations in near surface or subsurface environments are achieved by either aerobic or ...
Ajay Singh +4 more
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New Horizons for Deep Subsurface Microbiology
Microbe Magazine, 2009The U.S. Department of Energy (DOE) launched the modern era of subsurface microbiology at its Savannah River Plant (SRP) in South Carolina in 1986. Those first efforts, involving three 200-m-deep wells along with procedures to monitor for drilling-related contaminants, uncovered abundant and diverse microbial communities in subsurface aquifers (Fig. 1).
T. C. Onstott +4 more
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Research in Microbiology, 2003
The majority of the Earth's petroleum resource is partly biodegraded. This is of considerable practical significance and can limit economic exploitation of petroleum reserves and lead to problems during petroleum production. Knowledge of the microorganisms present in petroleum reservoirs, their physiological properties and the biochemical potential for
Roling WFM, Head IM, Larter SR
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The majority of the Earth's petroleum resource is partly biodegraded. This is of considerable practical significance and can limit economic exploitation of petroleum reserves and lead to problems during petroleum production. Knowledge of the microorganisms present in petroleum reservoirs, their physiological properties and the biochemical potential for
Roling WFM, Head IM, Larter SR
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Microbiological characterization and nitrate reduction in subsurface soils
Biology and Fertility of Soils, 1989Two borings (20 m depth) were performed in a sandy-clayey soil over a limestone bed and in a sandy soil with lumps of clay in some depths. Bacteria were found in the deeper soil layers of both profiles. The methods used to detect bacteria were those normally used for topsoil layers, plate counts of bacteria, ATP content, and direct microscopy ...
A.M. Lind, F. Eiland
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Methods for recovery of deep terrestrial subsurface sediments for microbiological studies
Journal of Microbiological Methods, 1989Methods for the aseptic recovery of sediments from the terrestrial deep subsurface for microbiological analyses are defined. Sediments were recovered from depths > 300 m by rotary drilling techniques using bentonite drilling techniques. Four sampling tools were successfully used and compared for their ability to retrieve different types of subsurface ...
T.J. Phelps +4 more
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Microbiological Indicators of Subsurface Hydrocarbon Accumulations
AAPG Bulletin, 1991The measurement of toxin tolerance in the microbial communities present in stream sediments has been demonstrated to be an effective exploration tool. The technique relies on the fact that metals of, or associated with, ore deposits often represent toxins to microbial communities.
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Canadian Journal of Microbiology, 1974
Concentrations of bacteria, fungi, ammonium, nitrate, nitrite, orthophosphate, sulfate, and certain metals were enriched in freshwater-surface microlayer samples relative to the bulk-subsurface water. Results differed markedly depending on which of three methods for surface-microlayer collection was used. This report suggests that the biologically and
R F, Hatcher, B C, Parker
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Concentrations of bacteria, fungi, ammonium, nitrate, nitrite, orthophosphate, sulfate, and certain metals were enriched in freshwater-surface microlayer samples relative to the bulk-subsurface water. Results differed markedly depending on which of three methods for surface-microlayer collection was used. This report suggests that the biologically and
R F, Hatcher, B C, Parker
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Subsurface Microbiology and the Evolution of the Biosphere
2018This chapter explores potential intersections between studies of subsurface microbiology and various studies of planetary-scale ecology. It outlines some important functional links between subsurface microorganisms and larger ecological processes.
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Characterization of the microbiology within a 21 m3section of rock from the deep subsurface
Microbial Ecology, 1993The distribution of aerobic chemoheterotrophic microorganisms within a 21 m3 section of deep subsurface rock was determined. Nineteen samples for microbiological analysis were aseptically taken by hand from the walls of a 400 m deep subsurface tunnel after an alpine miner created fresh rock faces 0.76, 1.52, 2.28, and 3.04 m into the tunnel wall.
D L, Haldeman +3 more
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2013
This chapter gives the reader an introduction into the microbiology of deep geological systems with a special focus on potential geobiotechnological applications and respective risk assessments. It has been known for decades that microbial activity is responsible for the degradation or conversion of hydrocarbons in oil, gas, and coal reservoirs.
Claudia, Gniese +6 more
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This chapter gives the reader an introduction into the microbiology of deep geological systems with a special focus on potential geobiotechnological applications and respective risk assessments. It has been known for decades that microbial activity is responsible for the degradation or conversion of hydrocarbons in oil, gas, and coal reservoirs.
Claudia, Gniese +6 more
openaire +2 more sources