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GeoHEALTH-USGS Newsletter

GeoHEALTH-USGS Newsletter

The GeoHEALTH-USGS Newsletter provides information on new USGS science activities related to safeguarding the health of fish, wildlife, domesticated animals, livestock, and people from environmental exposures to contaminants and pathogens.

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Featured Science Activities

Featured Science Activities

Lean about our Featured Science Activities through our pages that highlight recience studies, publications, and results.

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Filter Total Items: 3,850
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Year Published: 1996

Glutathione conjugation and contaminant transformation

The recent identification of a novel sulfonated metabolite of alachlor in groundwater and metolachlor in soil is likely the result of glutathione conjugation. Glutathione conjugation is an important biochemical reaction that leads, in the case of alachlor, to the formation of a rather difficult to detect, water-soluble, and therefore highly mobile...

Field, Jennifer A.; Thurman, E.M.

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Year Published: 1996

Benthic processes in South San Francisco Bay: The role of organic inputs and bioturbation

No abstract available.

Hollibaugh, J.T.; Caffrey, J.M.; Hammond, Douglas E.; Kuwabara, James S.; Miller, L.G.; Twilley, R.R.
Caffrey, J. M., Hammond, D. E., Kuwabara, J. S., Miller, L. G., & Twilley, R. R. (1996). Benthic processes in South San Francisco Bay: The role of organic inputs and bioturbation. San Francisco Bay: The Ecosystem, 425-442.

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Year Published: 1996

Dimethylsulfoniopropionate as a potential methanogenic substrate in Mono Lake sediments

A high concentration of dimethylsulfoniopropionate (DMSP) was found in the water column (0.1–1.8 µM particulate plus dissolved) of Mono Lake, CA, an alkaline, hypersaline waterbody. The dense Artemia monica population contained high levels of DMSP (1.7–2.5 mmol.g-1 wet weight), presumably as an osmolyte. Death of these brine shrimp...

Visscher, P.T.; Guidetti, J.R.; Culbertson, Charles W.; Oremland, Ronald S.
Visscher, P.T., Guidetti, J.R., Culbertson, C.W., and Oremland, R.S., 1996, Dimethylsulfoniopropionate as a potential methanogenic substrate in Mono Lake sediments, in Kiene, R.P., Visscher, P.T., Keller, M.D., and Kirst, G.O., eds., Biological and Environmental Chemistry of DMSP and Related Sulfonium Compounds: New York, Plenum Press, p. 361-368.

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Year Published: 1996

Microbial cycling of methyl bromide

Environmental concern about brominated halocarbons like methyl bromide (MeBr) is focused on their potential to destroy stratospheric ozone. Photocatalysis of MeBr and other halocarbons in the stratosphere results in the liberation of reactive CI and Br atoms. Because Br atoms are perhaps as much as 100-fold more efficient at attacking ozone than...

Lidstrom, M.E.; Tabita, F.R.; Oremland, Ronald S.
Oremland, R.S., 1996, Microbial cycling of methyl bromide, in Lidstrom, M.E., and Tabita, F.R., eds., Microbial Growth on C1 Compounds: Dordrecht, The Netherlands, Kluwer Academic Publishers, p. 310-317.

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Year Published: 1996

Investigation of methane production and consumption by use of stable isotopes

No abstract available. 

Revesz, Kinga M.; Coplen, Tyler B.; Baedecker, Mary Jo; Glynn, P.D.; Hult, M.F.
Revesz, K., Coplen, T.B., Baedecker, M.J., Glynn, P.D., and Hult, M., 1996, Investigation of methane production and consumption by use of stable isotopes, in Isotopes in Water Resources Management: Vienna, International Atomic Energy Agency, v. 1, p. 381-387.

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Year Published: 1996

A Generalized Approach for the Interpretation of Geophysical Well Logs in Ground-Water Studies:Theory and Application

Quantitative analysis of geophysical logs in ground-water studies often involves at least as broad a range of applications and variation in lithology as is typically encountered in petroleum exploration, making such logs difficult to calibrate and complicating inversion problem formulation. At the same time, data inversion and analysis depend on...

Paillet, Frederick L.; Crowder, R.E.
A Generalized Approach for the Interpretation of Geophysical Well Logs in Ground-Water Studies - Theory and Application; 1996; Article; Journal; Ground Water; Paillet, F. L.; Crowder, R. E.

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Year Published: 1996

A sample-freezing drive shoe for a wire line piston core sampler

Loss of fluids and samples during retrieval of cores of saturated, noncohesive sediments results in incorrect measures of fluid distributions and an inaccurate measure of the stratigraphic position of the sample. To reduce these errors, we developed a hollow drive shoe that freezes in place the lowest 3 inches (75 mm) of a 1.88‐inch‐diameter (48...

Murphy, F.; Herkelrath, W.N.
A sample-freezing drive shoe for a wire line piston core sampler; 1996; Article; Journal; Ground Water Monitoring and Remediation; Murphy, F.; Herkelrath, W. N.

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Year Published: 1996

Acetochlor in the hydrologic system in the midwestern United States, 1994

The herbicide acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamide] was given conditional registration in the United States by the U.S. Environmental Protection Agency in March 1994. This registration provided a rare opportunity to investigate the occurrence of a pesticide during its first season of extensive use in the...

Kolpin, D.W.; Nations, B.K.; Goolsby, D.A.; Thurman, E.M.
Acetochlor in the hydrologic system in the midwestern United States, 1994; 1996; Article; Journal; Environmental Science and Technology; Kolpin, D. W.; Nations, B. K.; Goolsby, D. A.; Thurman, E. M.

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Year Published: 1996

Age dating of shallow groundwater with chlorofluorocarbons, tritium/helium: 3, and flow path analysis, southern New Jersey coastal plain

Groundwater age dating through the combination of transient tracer methods (chlorofluorocarbons (CFCs) and tritium/helium 3 (3H/3He)) and groundwater flow path analysis is useful for investigating groundwater travel times, flow patterns, and recharge rates, as demonstrated by this study of the homogeneous shallow, unconfined Kirkwood-Cohansey...

Szabo, Zoltan; Rice, D.E.; Plummer, Niel; Busenberg, E.; Drenkard, S.; Schlosser, P.
Age dating of shallow groundwater with chlorofluorocarbons, tritium/helium 3, and flow path analysis, southern New Jersey coastal plain; 1996; Article; Journal; Water Resources Research; Szabo, Z.; Rice, D. E.; Plummer, L. N.; Busenberg, E.; Drenkard, S.; Schlosser, P.

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Year Published: 1996

Anaerobic mineralization of vinyl chloride in Fe(III)-reducing, aquifer sediments

Within anaerobic aquifer systems, reductive dehalogenation of polychlorinated ethenes commonly results in the accumulation of vinyl chloride, which is highly toxic and carcinogenic to humans. Anaerobic reduction of vinyl chloride is considered to be slow and incomplete. Here, we provide the first evidence for anaerobic oxidation of vinyl chloride...

Bradley, P.M.; Chapelle, F.H.
Anaerobic mineralization of vinyl chloride in Fe(III)-reducing, aquifer sediments; 1996; Article; Journal; Environmental Science and Technology; Bradley, P. M.; Chapelle, F. H.

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Year Published: 1996

Analysis of fractures intersecting Kahi Puka Well 1 and its relation to the growth of the island of Hawaii

As part of the Hawaii Scientific Drilling Project, Kahi Puka Well 1 penetrated about 275 m of Mauna Loa basalts overlying a sequence of Mauna Kea flow units as it was drilled and cored to a total depth of 1053 m below land surface. A borehole televiewer (BHTV) was run in most of the well in successive stages prior to casing in order to obtain...

Morin, Roger H.; Paillet, Frederick L.