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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: 2,970
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Year Published: 1985

Effects of copper on production of periphyton, nitrogen fixation and processing of leaf litter in a Sierra Nevada, California, stream

1Production of periphyton, nitrogen fixation and processing of leaf litter were examined in an oligotrophic Sierra Nevada stream and the responses of these processes to copper (2.5, 5 and 10μg 1-1 CuT [total filtrable copper]; approximately 12, 25 and 50 ng 1-1 Cu2+) were determined.2Autotrophic and total production were estimated from 3-week...

Leland, Harry V.; Carter, James L.

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Year Published: 1985

The aqueous photolysis of ethylene glycol adsorbed on geothite

Suspensions of goethite (α-FeOOH) were photolyzed in aerated ethylene glycol-water solutions at pH 6.5, with ultraviolet light in the wavelength range300–400 nm. Under these conditions, formaldehyde and glycolaldehyde were detected as photoproducts. Quantum yields of formaldehyde production ranged from 1.9 7times; 10-5 to 2.9 × 10-4 over the...

Cunningham, Kirkwood M.; Goldberg, Marvin C.; Weiner, E.R.

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Year Published: 1985

Sorption of lead onto two gram-negative marine bacteria in seawater

Laboratory adsorption experiments performed at environmentally significant lead (Pb) and cell concentrations indicate that the marine bacteria examined have significant binding capacities for Pb. However, the behavior governing Pb sorption onto gram-negative bacteria in seawater may be quite complex. The sorption kinetics appear to involve two...

Harvey, Ronald W.; Leckie, James O.

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Year Published: 1985

Application of NMR spectroscopy for determining functionality in humic substances

No abstract available. 

Wershaw, Robert L.
Wershaw, R.L., 1985, Application of NMR spectroscopy for determining functionality in humic substances, in Aiken, G.R., McKnight, D.M., Wershaw, R.L., and McCarthy, P., eds., Humic substances in soil, sediment, and water--Geochemistry, isolation, and characterization: New York, John Wiley and Sons, p. 561-582.

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Year Published: 1985

Molecular weight and size measurements of humic substances

No abstract available. 

Wershaw, R. L.; Aiken, George R.
Wershaw, R.L., and Aiken, G.R., 1985, Molecular weight and size measurements of humic substances, in Aiken, G.R., McKnight, D.M., Wershaw, R.L., and McCarthy, P., eds., Humic substances in soil, sediment, and water--Geochemistry, isolation, and characterization: New York, John Wiley and Sons, p. 477-492.

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Year Published: 1985

Groundwater forecasting

No abstract available. 

Anderson, M.G.; Burt, T.P.; Konikow, Leonard F.; Patten, E.P.

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Year Published: 1985

Stable isotope and amino acid composition of estuarine dissolved colloidal material

No abstract available. 

Sigleo, A.C.; Hattori, A.; Sigleo, A.C.; Macko, S.A.
Sigleo, A.C., and Macko, S.A., 1985, Stable isotope and amino acid composition of estuarine dissolved colloidal material, inSigleo, A.C., and Hattori, A., eds., Marine and Estuarine Geochemistry: Chelsea, Mich., Lewis Publishers, p. 29-46.

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Year Published: 1985

Aspects of the biogeochemistry of Big Soda Lake, Nevada

No abstract available. 

Oremland, Ronald S.; Smith, R.L.; Culbertson, Charles W.
Oremland, R.S., Smith, R.L., and Culbertson, C.W., 1985, Aspects of the biogeochemistry of Big Soda Lake, Nevada, in Caldwell, Brierley, and Brierley, eds., Planetary Ecology: New York, Van Nostrand Reinhold, p. 81-88.

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Year Published: 1985

Humic substances in groundwater

No abstract available. 

Aiken, G. R.; McKnight, D.M.; Wershaw, R. L.; McCarthy, Peter M.; Thurman, E.M.
Thurman, E.M., 1985, Humic substances in groundwater, in Aiken, G.R., McKnight, D.M., Wershaw, R.L., and McCarthy, P., eds., Humic substances in soil, sediment, and water--Geochemistry, isolation, and characterization: New York, John Wiley and Sons, p. 87-103.

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Year Published: 1985

Approaches to the study of lake hydrology

No abstract available 

Winter, T.C.; Likens, Gene E
Winter, T.C., 1985, Approaches to the study of lake hydrology, in Likens, G.E., ed., An ecosystem approach to aquatic ecology, Mirror Lake and its environment: New York, Springer-Verlag, p. 128-135.

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Year Published: 1985

Assessment of long-term salinity changes in an irrigated stream-aquifer system

Changes in salinity in groundwater and surface water in the Arkansas River valley of southeastern Colorado are primarily related to irrigation practices. A solute transport model was applied to an 11-mile reach of the valley to compute salinity changes in response to spatially and temporally varying stresses. The model was calibrated in 1973 using...

Konikow, Leonard F.; Person, Mark
ASSESSMENT OF LONG-TERM SALINITY CHANGES IN AN IRRIGATED STREAM-AQUIFER SYSTEM.; 1985; Article; Journal; Water Resources Research; Konikow, Leonard, F.; Person, Mark

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Year Published: 1985

Modeling the rate-controlled sorption of hexavalent chromium

Sorption of chromium VI on the iron-oxide- and hydroxide-coated surface of alluvial material was numerically simulated with rate-controlled reactions. Reaction kinetics and diffusional processes, in the form of film, pore, and particle diffusion, were simulated and compared with experimental results. The use of empirically calculated rate...

Grove, D.B.; Stollenwerk, K.G.
MODELING THE RATE-CONTROLLED SORPTION OF HEXAVALENT CHROMIUM.; 1985; Article; Journal; Water Resources Research; Grove, D. B.; Stollenwerk, K. G.