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Your search keyword '"Gilmour, Cynthia C."' showing total 184 results
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184 results on '"Gilmour, Cynthia C."'

1. Experimental evidence for recovery of mercury-contaminated fish populations

Author

Blanchfield, Paul J., Rudd, John W. M., Hrenchuk, Lee E., Amyot, Marc, Babiarz, Christopher L., Beaty, Ken G., Bodaly, R. A. Drew, Branfireun, Brian A., Gilmour, Cynthia C., Graydon, Jennifer A., Hall, Britt D., Harris, Reed C., Heyes, Andrew, Hintelmann, Holger, Hurley, James P., Kelly, Carol A., Krabbenhoft, David P., Lindberg, Steve E., Mason, Robert P., Paterson, Michael J., Podemski, Cheryl L., Sandilands, Ken A., Southworth, George R., St Louis, Vincent L., Tate, Lori S., and Tate, Michael T.

Published
2022
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11. Whole-Ecosystem Study Shows Rapid Fish-Mercury Response to Changes in Mercury Deposition

Author

Harris, Reed C., Rudd, John W. M., Amyot, Marc, Babiarz, Christopher L., Beaty, Ken G., Blanchfield, Paul J., Bodaly, R. A., Branfireun, Brian A., Gilmour, Cynthia C., Graydon, Jennifer A., Heyes, Andrew, Hintelmann, Holger, Hurley, James P., Kelly, Carol A., Krabbenhoft, David P., Lindberg, Steve E., Mason, Robert P., Paterson, Michael J., Podemski, Cheryl L., Robinson, Art, Sandilands, Ken A., Southworth, George R., St. Louis, Vincent L., and Tate, Michael T.

Published
2007
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12. Experimental evidence for recovery of mercury-contaminated fish populations

Author

Blanchfield, Paul J., primary, Rudd, John W. M., additional, Hrenchuk, Lee E., additional, Amyot, Marc, additional, Babiarz, Christopher L., additional, Beaty, Ken G., additional, Bodaly, R. A. Drew, additional, Branfireun, Brian A., additional, Gilmour, Cynthia C., additional, Graydon, Jennifer A., additional, Hall, Britt D., additional, Harris, Reed C., additional, Heyes, Andrew, additional, Hintelmann, Holger, additional, Hurley, James P., additional, Kelly, Carol A., additional, Krabbenhoft, David P., additional, Lindberg, Steve E., additional, Mason, Robert P., additional, Paterson, Michael J., additional, Podemski, Cheryl L., additional, Sandilands, Ken A., additional, Southworth, George R., additional, St Louis, Vincent L., additional, Tate, Lori S., additional, and Tate, Michael T., additional

Published
2021
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16. Bioaccumulation of newly deposited mercury by fish and invertebrates: an enclosure study using stable mercury isotopes

Author

Paterson, Michael J., Blanchfield, Paul J., Podemski, Cheryl, Hintelmann, Holger H., Gilmour, Cynthia C., Harris, Reed, Ogrinc, Nives, Rudd, John W.M., and Sandilands, Ken A.

Subjects
Bioaccumulation -- Research, Fishes -- Physiological aspects, Fishes -- Research, Isotope separation -- Research, Earth sciences
Abstract

Abstract: Enriched stable mercury (Hg) isotopes were added to four 10 m diameter enclosures in Lake 239 at the Experimental Lakes Area to increase inorganic Hg loading. Our main objectives [...]

Published
2006

18. Mercury methylation by Desulfovibrio desulfuricans ND132 in the presence of polysulfides

Author

Jay, Jenny Ayla, Murray, Karen J., Gilmour, Cynthia C., Mason, Robert P., Morel, Francois M. M., Roberts, A. Lynn, and Hemond, Harold F.

Subjects
Mercury compounds -- Physiological aspects, Methylation -- Physiological aspects, Sulfides -- Physiological aspects, Bacteria -- Physiological aspects, Biological sciences
Abstract

Research has been conducted on mercury-polysulfide complexes in sulfidic waters containing zero-valent sulfur. Results demonstrate that methylation rates in cultures of Desulfovibrio desulfuricans ND132 do not increase in the presence of polysulfides.

Published
2002

23. Methyl-mercury degradation pathways: a comparison among three mercury-impacted ecosystems

Author

Marvin-Dipasquale, Mark, Agee, Jennifer, McGowan, Chad, Oremland, Ronald S., Krabbenhoft, David, and Gilmour, Cynthia C.

Subjects
Fresh water, Environmental issues, Science and technology
Abstract

Microbial methylmercury degradation was studied in the sediment of three regions, including: the Florida Everglades, Carson River, Nevada, and San Carlos Creek, California. Degradation rate constant values went up with contamination of total mercury within ecosystems. The study is broken down into an introduction, a discussion of the methods used, and a discussion of the results.

Published
2000

25. Accumulation of selenium in a model freshwater microbial food web

Author

Sanders, Robert W. and Gilmour, Cynthia C.

Subjects
Selenium -- Research, Freshwater ecology -- Environmental aspects, Food chains (Ecology) -- Research, Biological sciences
Abstract

Paramecium putrinum, a ciliated protozoan in fresh water environment, accumulates high levels of selenium during feeding and metabolism. Dilution of 75Se-labeled bacterial food indicates a reduction in selenate and selenite concentrations in the ciliates, with decrease in selenium biomagnification, is not observed in the ciliates during the food chain.

Published
1994

27. Sulfate simulation of mercury methylation in freshwater sediments

Author

Gilmour, Cynthia C., Henry, Elizabeth A., and Mitchell, Ralph

Subjects
Aquatic microbiology -- Research, Methylation -- Analysis, Organosulfur compounds -- Environmental aspects, Environmental issues, Science and technology
Abstract

The increase in the rates of of transformation of inorganic mercury to methylmercury due to an increase in sulfate levels in freshwater ecosystems is studied. Anoxic sediment slurries and lake water above above intact sediment cores were subjected to experimental additions of sulfate. The linkage between mercury methylation in freshwater sediments and sulfate reduction was established.

Published
1992

28. Persistent Reductions in the Bioavailability of PCBs at a Tidally Inundated Phragmites australis Marsh Amended with Activated Carbon

Author

Sanders, James P., Andrade, Natasha A., Menzie, Charles A., Amos, C. Bennett, Gilmour, Cynthia C., Henry, Elizabeth A., Brown, Steven S., and Ghosh, Upal

Subjects
intertidal Phragmites marshes, reducing porewater PCB concentrations, fungi, amendment of sediments with activated carbon (AC), food and beverages, polychlorinated biphenyls (PCBs), pilot‐scale field investigation, complex mixtures
Abstract

In situ amendment of sediments with highly sorbent materials like activated carbon (AC) is an increasingly viable strategy to reduce the bioavailability of persistent, sediment‐associated contaminants to benthic communities. Because in situ sediment remediation is an emerging strategy, much remains to be learned about the field conditions under which amendments can be effective, the resilience of amendment materials toward extreme weather conditions, and the optimal design of engineered applications. Here we report the results of a multi‐year, pilot‐scale field investigation designed to measure the persistence and efficacy of AC amendments to reduce the bioavailability of polychlorinated biphenyls (PCBs) in an intertidal Phragmites marsh. The amendments tested were granular AC (GAC), GAC with a layer of sand, and a pelletized fine AC. Key metrics presented include vertically‐resolved black carbon concentrations in sediment and PCB concentrations in sediment, porewater, and several invertebrate species. The results demonstrate that all three amendments withstood Hurricane Sandy and remained in place for the duration of the study, successfully reducing porewater PCB concentrations by 34–97%. Reductions in invertebrate bioaccumulation were observed in all amendment scenarios, with pelletized fine AC producing the most pronounced effect. Our findings support the use of engineered AC amendments in intertidal marshes, and can be used to inform amendment design, delivery, and monitoring at other contaminated sediment sites.

Published
2018
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29. Determining the Reliability of Measuring Mercury Cycling Gene Abundance with Correlations with Mercury and Methylmercury Concentrations

Author

Christensen, Geoff A., primary, Gionfriddo, Caitlin M., additional, King, Andrew J., additional, Moberly, James G., additional, Miller, Carrie L., additional, Somenahally, Anil C., additional, Callister, Stephen J., additional, Brewer, Heather, additional, Podar, Mircea, additional, Brown, Steven D., additional, Palumbo, Anthony V., additional, Brandt, Craig C., additional, Wymore, Ann M., additional, Brooks, Scott C., additional, Hwang, Chiachi, additional, Fields, Matthew W., additional, Wall, Judy D., additional, Gilmour, Cynthia C., additional, and Elias, Dwayne A., additional

Published
2019
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35. Carbon Amendments Alter Microbial Community Structure and Net Mercury Methylation Potential in Sediments

Author

Christensen, Geoff A., primary, Somenahally, Anil C., additional, Moberly, James G., additional, Miller, Carrie M., additional, King, Andrew J., additional, Gilmour, Cynthia C., additional, Brown, Steven D., additional, Podar, Mircea, additional, Brandt, Craig C., additional, Brooks, Scott C., additional, Palumbo, Anthony V., additional, Wall, Judy D., additional, and Elias, Dwayne A., additional

Published
2018
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37. Development and Validation of Broad-Range Qualitative and Clade-Specific Quantitative Molecular Probes for Assessing Mercury Methylation in the Environment

Author

Christensen, Geoff A., primary, Wymore, Ann M., additional, King, Andrew J., additional, Podar, Mircea, additional, Hurt, Richard A., additional, Santillan, Eugenio U., additional, Soren, Ally, additional, Brandt, Craig C., additional, Brown, Steven D., additional, Palumbo, Anthony V., additional, Wall, Judy D., additional, Gilmour, Cynthia C., additional, and Elias, Dwayne A., additional

Published
2016
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40. Mercury Methylation by Novel Microorganisms from New Environments

Author

Gilmour, Cynthia C., primary, Podar, Mircea, additional, Bullock, Allyson L., additional, Graham, Andrew M., additional, Brown, Steven D., additional, Somenahally, Anil C., additional, Johs, Alex, additional, Hurt, Richard A., additional, Bailey, Kathryn L., additional, and Elias, Dwayne A., additional

Published
2013
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45. Genome Sequence of the Mercury-Methylating and Pleomorphic Desulfovibrio africanus Strain Walvis Bay

Author

Brown, Steven D., primary, Wall, Judy D., additional, Kucken, Amy M., additional, Gilmour, Cynthia C., additional, Podar, Mircea, additional, Brandt, Craig C., additional, Teshima, Hazuki, additional, Detter, John C., additional, Han, Cliff S., additional, Land, Miriam L., additional, Lucas, Susan, additional, Han, James, additional, Pennacchio, Len, additional, Nolan, Matt, additional, Pitluck, Sam, additional, Woyke, Tanja, additional, Goodwin, Lynne, additional, Palumbo, Anthony V., additional, and Elias, Dwayne A., additional

Published
2011
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