Results 171 to 180 of about 34,488 (216)
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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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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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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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Utility of radiotracer activity measurements for subsurface microbiology studies
Journal of Microbiological Methods, 1989Radiotracer activity measurements were conducted on subsurface sediments collected from the Savannah River Plant, Aiken, SC. Sediments were aseptically extruded from stainless steel core liners into a nitrogen flushed glove bag. Subsurface materials were immediately inoculated into aerobic and/or anaerobic tubes for time course experiments ...
T.J. Phelps +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 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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Effect of Chemical Oxidation on Subsurface Microbiology and Trichloroethene (TCE) Biodegradation
Bioremediation Journal, 2000Abstract Research was conducted to determine the effect of chemical oxidation on subsurface microbiology and cometabolic biodegradation capacity in a trichloroethene (TCE)/perchloroethene (PCE)-contaminated aquifer previously treated with Fenton's reagent. Groundwater pH declined from 5 to 2.4 immediately after the treatment, and subsequently rose to a
James R. Kastner +4 more
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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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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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