Search Results - "Lewis, Brent L."

Short-term and interannual variability of redox-sensitive chemical parameters in hypoxic/anoxic bottom waters of the Chesapeake Bay by Lewis, Brent L., Glazer, Brian T., Montbriand, Paul J., Luther, George W., Nuzzio, Donald B., Deering, Timothy, Ma, Shufen, Theberge, Stephen

“…A combination of CTD casts, discrete bottle sampling and in situ voltammetric microelectrode profiling was used to examine changing redox conditions in the…”
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Processes controlling the distribution and cycling of manganese in the oxygen minimum zone of the Arabian Sea by Lewis, Brent L, Luther III, George W

“…Vertical and horizontal distributions of dissolved and particulate manganese were investigated in the Arabian Sea (Northwestern Indian Ocean) during the 1995…”
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Use of voltammetric solid-state (micro)electrodes for studying biogeochemical processes: Laboratory measurements to real time measurements with an in situ electrochemical analyzer (ISEA) by Luther, George W., Glazer, Brian T., Ma, Shufen, Trouwborst, Robert E., Moore, Tommy S., Metzger, Edouard, Kraiya, Chareonkwan, Waite, Tim J., Druschel, Gregory, Sundby, Bjørn, Taillefert, Martial, Nuzzio, Donald B., Shank, Timothy M., Lewis, Brent L., Brendel, Paul J.

“…Solid-state voltammetric (micro)electrodes have been used in a variety of environments to study biogeochemical processes. Here we show the wealth of…”
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Iron(III) Coordination Chemistry of Alterobactin A:  A Siderophore from the Marine Bacterium Alteromonas luteoviolacea by Holt, Pamela D, Reid, Richard R, Lewis, Brent L, Luther, George W, Butler, Alison

“…Alterobactin A is a siderophore produced by the oceanic bacterium Alteromonas luteoviolacea. The thermodynamic stability constant of the ferric alterobactin A…”
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Iron speciation in the Arabian Sea by Witter, Amy E., Lewis, Brent L., Luther III, George W.

“…Fe(III) speciation was measured in seawater collected as part of the United States Joint Global Ocean Flux (US JGOFS) Arabian Sea Process Study, Cruise TN045,…”
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Voltammetric estimation of iron(III) thermodynamic stability constants for catecholate siderophores isolated from marine bacteria and cyanobacteria by Lewis, Brent L., Holt, Pamela D., Taylor, Steven W., Wilhelm, Steven W., Trick, Charles G., Butler, Alison, Luther, George W.

“…Thermodynamic stability constants have been estimated for the complexation of iron(III) with catecholate-type siderophores isolated from the marine bacterium…”
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The effect of salinity on the acute toxicity of total and free cadmium to a Chesapeake Bay copepod and fish by Hall, Lenwood W., Ziegenfuss, Michael C., Anderson, Ronald D., Lewis, Brent L.

“…The objective of this study was to determine the influence of a range of salinities (5, 15 and 25 ppt) on the acute toxicity of total and free cadmium to the…”
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Interactions of manganese with the nitrogen cycle: Alternative pathways to dinitrogen by Luther, George W., Sundby, Bjørn, Lewis, Brent L., Brendel, Paul J., Silverberg, Norman

“…The conversion of combined nitrogen (ammonia, nitrate, organic nitrogen) to dinitrogen (N 2) in marine sediments, an important link in the global nitrogen…”
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Methylgermanium in natural waters by Lewis, Brent L, Froelich, Philip N, Andreae, Meinrat O

“…The concentrations of monomethylgermanium and dimethylgermanium in several rivers, estuaries, sea water, rainwater, and anoxic basins were determined by…”
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Determination of methylgermanium species in natural waters by graphite furnace atomic absorption spectrometry with hydride generation by Hambrick, Gordon A, Froelich, Philip N, Andreae, Meinrat O, Lewis, Brent L

“…Inorganic and methylgermanium species are determined in aqueous matrix at the parts-per-trillion level by a combination of hydride generation, graphite furnace…”
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Simultaneous Measurement of O2, Mn, Fe, I-, and S(-II) in Marine Pore Waters with a Solid-State Voltammetric Microelectrode by Luther, George W., Brendel, Paul J., Lewis, Brent L., Sundby, Bjorn, Lefrancois, Lucie, Silverberg, Norman, Nuzzio, Donald B.

“…A solid-state Au/Hg voltammetric microelectrode was used to measure, simultaneously and with millimeter spatial resolution, the vertical distributions of O2,…”
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Acute and Chronic Toxicity of Copper to the Estuarine Copepod Eurytemora affinis: Influence of Organic Comlexation and Speciation by Hall, Lenwood W, Anderson, Ronald D, Kilian, Jay V, Lewis, Brent L, Traexler, Kathy

“…Acute and chronic copper toxicity tests were conducted using the estuarine zooplankter, Eurytemora affinis, and the data were used to develop an…”
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Acute and chronic toxicity of copper to the estuarine copepod Eurytemora affinis: Influence of organic complexation and speciation by Hall, Lenwood W., Anderson, Ronald D., Kilian, Jay V., Lewes, Brent L., Traexler, Kathy

“…The objectives of this study were to conduct acute (48 and 96h) and chronic (8d) copper toxicity tests with the estuarine zooplankter, Eurytemora affinis and…”
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Simultaneous measurement of O 2 , Mn, Fe, I − , and S(—II) in marine pore waterswith a solid‐state voltammetric microelectrode by Luther, George W., Brendel, Paul J., Lewis, Brent L., Sundby, Bjørn, Lefrançois, Lucie, Silverberg, Norman, Nuzzio, Donald B.

“…A solid‐state Au/Hg voltammetric microelectrode was used to measure, simultaneously and with millimeter spatial resolution, the vertical distributions of O 2 ,…”
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