Sample records for task 45-mercury control
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JV Task 98 - Controlling Mercury Emissions for Utilities Firing Lignites from North America
DOE Office of Scientific and Technical Information (OSTI.GOV)
Steven Benson
2007-06-15
This project compiled and summarized the findings and conclusions of research, development, and demonstration projects on controlling mercury from lignite coals. A significant amount of work has been conducted since 1994 on mercury in lignite, mercury measurement in flue gases, sorbent, sorbent enhancement additives, oxidation agent development, and full-scale demonstration of mercury control technologies. This report is focused on providing the lignite industry with an understanding of mercury issues associated with the combustion of lignite, as well as providing vital information on the methods to control mercury emissions in coal-fired power plants.
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Field Testing of a Wet FGD Additive for Enhanced Mercury Control - Task 3 Full-scale Test Results
DOE Office of Scientific and Technical Information (OSTI.GOV)
Gary Blythe
2007-05-01
This Topical Report summarizes progress on Cooperative Agreement DE-FC26-04NT42309, 'Field Testing of a Wet FGD Additive'. The objective of the project is to demonstrate the use of a flue gas desulfurization (FGD) additive, Degussa Corporation's TMT-15, to prevent the reemission of elemental mercury (Hg{sup 0}) in flue gas exiting wet FGD systems on coal-fired boilers. Furthermore, the project intends to demonstrate whether the additive can be used to precipitate most of the mercury (Hg) removed in the wet FGD system as a fine TMT salt that can be separated from the FGD liquor and bulk solid byproducts for separate disposal.more » The project is conducting pilot- and full-scale tests of the TMT-15 additive in wet FGD absorbers. The tests are intended to determine required additive dosages to prevent Hg{sup 0} reemissions and to separate mercury from the normal FGD byproducts for three coal types: Texas lignite/Power River Basin (PRB) coal blend, high-sulfur Eastern bituminous coal, and low-sulfur Eastern bituminous coal. The project team consists of URS Group, Inc., EPRI, TXU Generation Company LP, Southern Company, and Degussa Corporation. TXU Generation has provided the Texas lignite/PRB cofired test site for pilot FGD tests, Monticello Steam Electric Station Unit 3. Southern Company is providing the low-sulfur Eastern bituminous coal host site for wet scrubbing tests, as well as the pilot- and full-scale jet bubbling reactor (JBR) FGD systems to be tested. IPL, an AES company, provided the high-sulfur Eastern bituminous coal full-scale FGD test site and cost sharing. Degussa Corporation is providing the TMT-15 additive and technical support to the test program as cost sharing. The project is being conducted in six tasks. Of the six project tasks, Task 1 involves project planning and Task 6 involves management and reporting. The other four tasks involve field testing on FGD systems, either at pilot or full scale. The four tasks include: Task 2 - Pilot Additive
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Field Testing of a Wet FGD Additive for Enhanced Mercury Control - Task 5 Full-Scale Test Results
DOE Office of Scientific and Technical Information (OSTI.GOV)
Gary Blythe; MariJon Owens
2007-12-01
This Topical Report summarizes progress on Cooperative Agreement DE-FC26-04NT42309, 'Field Testing of a Wet FGD Additive'. The objective of the project is to demonstrate the use of two flue gas desulfurization (FGD) additives, Evonik Degussa Corporation's TMT-15 and Nalco Company's Nalco 8034, to prevent the re-emission of elemental mercury (Hg{sup 0}) in flue gas exiting wet FGD systems on coal-fired boilers. Furthermore, the project intends to demonstrate whether the additive can be used to precipitate most of the mercury (Hg) removed in the wet FGD system as a fine salt that can be separated from the FGD liquor and bulkmore » solid byproducts for separate disposal. The project is conducting pilot- and full-scale tests of the additives in wet FGD absorbers. The tests are intended to determine required additive dosages to prevent Hg{sup 0} re-emissions and to separate mercury from the normal FGD byproducts for three coal types: Texas lignite/Powder River Basin (PRB) coal blend, high-sulfur Eastern bituminous coal, and low-sulfur Eastern bituminous coal. The project team consists of URS Group, Inc., EPRI, Luminant Power (was TXU Generation Company LP), Southern Company, IPL (an AES company), Evonik Degussa Corporation and the Nalco Company. Luminant Power has provided the Texas lignite/PRB co-fired test site for pilot FGD tests and cost sharing. Southern Company has provided the low-sulfur Eastern bituminous coal host site for wet scrubbing tests, as well as the pilot- and full-scale jet bubbling reactor (JBR) FGD systems tested. IPL provided the high-sulfur Eastern bituminous coal full-scale FGD test site and cost sharing. Evonik Degussa Corporation is providing the TMT-15 additive, and the Nalco Company is providing the Nalco 8034 additive. Both companies are also supplying technical support to the test program as in-kind cost sharing. The project is being conducted in six tasks. Of the six project tasks, Task 1 involves project planning and Task 6 involves
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DOE Office of Scientific and Technical Information (OSTI.GOV)
Sjostrom, S.; Durham, M.; Bustard, J.
2009-07-15
Although activated carbon injection (ACI) has been proven to be effective for many configurations and is a preferred option at many plants sufficient quantities of powdered activated coking (PAC) must be available to meet future needs. The authors estimate that upcoming federal and state regulations will result in tripling the annual US demand for activated carbon to nearly 1.5 billion lb from approximately 450 million lb. Rapid expansion of US production capacity is required. Many PAC manufacturers are discussing expansion of their existing production capabilities. One company, ADA Carbon Solutions, is in the process of constructing the largest activated carbonmore » facility in North America to meet the future demand for PAC as a sorbent for mercury control. Emission control technology development and commercialization is driven by regulation and legislation. Although ACI will not achieve > 90% mercury control at every plant, the expected required MACT legislation level, it offers promise as a low-cost primary mercury control technology option for many configurations and an important trim technology for others. ACI has emerged as the clear mercury-specific control option of choice, representing over 98% of the commercial mercury control system orders to date. As state regulations are implemented and the potential for a federal rule becomes more imminent, suppliers are continuing to develop technologies to improve the cost effectiveness and limit the balance of plant impacts associated with ACI and are developing additional PAC production capabilities to ensure that the industry's needs are met. The commercialisation of ACI is a clear example of industry, through the dedication of many individuals and companies with support from the DOE and EPRI, meeting the challenge of developing cost-effectively reducing emissions from coal-fired power plants. 7 refs., 1 fig.« less
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Fate of Mercury in Synthetic Gypsum Used for Wallboard Production
DOE Office of Scientific and Technical Information (OSTI.GOV)
Jessica Sanderson; Gary M. Blythe; Mandi Richardson
2006-12-01
expected to impact the stability of mercury in synthetic gypsum used to produce wallboard, so Task 6 was added to the project to test this theory. In this project, process stacks in the wallboard plant have been sampled using the Ontario Hydro method. For every task, the stack locations sampled have included a dryer for the wet gypsum as it enters the plant and a gypsum calciner. For Tasks 1, 4, 5 and 6, the stack of the dryer for the wet wallboard product was also tested. Also at each site, in-stream process samples were collected and analyzed for mercury concentration before and after each significant step in wallboard production. The Ontario Hydro results, process sample mercury concentration data, and process data were used to construct mercury mass balances across the wallboard plants. Task 6 was conducted at a wallboard plant processing synthetic gypsum from a power plant that fires Eastern bituminous coal. The power plant has a single-loop, open spray tower limestone forced oxidation FGD system, with the forced oxidation conducted in the reaction tank integral with the FGD absorber. The FGD system has gypsum fines blow down as part of the dewatering step. The power plant is equipped with a selective catalytic reduction (SCR) system for NOX emissions control, and the SCR was in service during the time period the gypsum tested was produced. Also, as mentioned above, Degussa additive TMT-15 was being added to the FGD system when this gypsum was produced. The results of the Task 6 stack testing, as measured by the Ontario Hydro method, detected that an average of 55% of the incoming mercury was emitted during wallboard production. These losses were distributed as about 4% across the dryer mill, 6% across the board dryer kiln, and 45% across the kettle calciner. Emissions were similar to what Task 5 results showed on a percentage basis, but about 30% lower on a mass basis. The same power plant FGD system produced the synthetic gypsum used in Task 5 (with no use of TMT-15
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Field Demonstration of Enhanced Sorbent Injection for Mercury Control
DOE Office of Scientific and Technical Information (OSTI.GOV)
Shin Kang; Robert Schrecengost
2009-01-07
Alstom Power Inc. has conducted a DOE/NETL-sponsored program (under DOE Cooperative Agreement No. DE-FC26-04NT42306) to demonstrate Mer-Cure{trademark}, one of Alstom's mercury control technologies for coal-fired boilers. Mer-Cure{trademark} utilizes a small amount of Mer-Clean{trademark} sorbent that is injected into the flue gas stream for oxidation and adsorption of gaseous mercury. Mer-Clean{trademark} sorbents are carbon-based and prepared with chemical additives that promote oxidation and capture of mercury. Mer-Cure{trademark} is unique in that the sorbent is injected into an environment where the mercury capture kinetics is accelerated. This full-scale demonstration program was comprised of three seven-week long test campaigns at three host sites including PacifiCorp's 240-MW{sub e} Dave Johnston Unit No.3 burning a Powder River Basin (PRB) coal, Basin Electric's 220-MW{sub e} Leland Olds Unit No.1 burning a North Dakota lignite, and Reliant Energy's 170-MW{sub e} Portland Unit No.1 burning an Eastern bituminous coal. All three boilers are equipped with electrostatic precipitators. The goals for this Round 2 program, established by DOE/NETL under the original solicitation, were to reduce the uncontrolled mercury emissions by 50 to 70% at a cost 25 to 50% lower than the previous target ofmore » $$60,000/lb mercury removed. The results for all three host sites indicated that Mer-Cure{trademark} technology could achieve mercury removal of 90%. The estimated mercury removal costs were 25-92% lower than the benchmark of $$60,000/lb mercury removed. The estimated costs for control, at sorbent cost of $1.25 to $2.00/lb respectively, are as follows: (1) Dave Johnston Unit No.3--$2,650 to $4,328/lb Hg removed (92.8% less than $60k/lb); (2) Leland Olds Unit No.1--$8,680 to $13,860/lb Hg removed (76.7% less than $60k/lb); and (3) Portland Unit No.1--$28,540 to $45,065/lb Hg removed (24.9% less than $60k/lb). In summary, the results from demonstration testing at all
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MODELING MERCURY CONTROL WITH POWDERED ACTIVATED CARBON
The paper presents a mathematical model of total mercury removed from the flue gas at coal-fired plants equipped with powdered activated carbon (PAC) injection for Mercury control. The developed algorithms account for mercury removal by both existing equipment and an added PAC in...
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Carbon bed mercury emissions control for mixed waste treatment.
Soelberg, Nick; Enneking, Joe
2010-11-01
Mercury has various uses in nuclear fuel reprocessing and other nuclear processes, and so it is often present in radioactive and mixed (radioactive and hazardous) wastes. Compliance with air emission regulations such as the Hazardous Waste Combustor (HWC) Maximum Achievable Control Technology (MACT) standards can require off-gas mercury removal efficiencies up to 99.999% for thermally treating some mixed waste streams. Test programs have demonstrated this level of off-gas mercury control using fixed beds of granular sulfur-impregnated activated carbon. Other results of these tests include (1) the depth of the mercury control mass transfer zone was less than 15-30 cm for the operating conditions of these tests; (2) MERSORB carbon can sorb mercury up to 19 wt % of the carbon mass; and (3) the spent carbon retained almost all (98.3-99.99%) of the mercury during Toxicity Characteristic Leachability Procedure (TCLP) tests, but when even a small fraction of the total mercury dissolves, the spent carbon can fail the TCLP test when the spent carbon contains high mercury concentrations.
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Fate of Mercury in Synthetic Gypsum Used for Wallboard Production
DOE Office of Scientific and Technical Information (OSTI.GOV)
Jessica Marshall Sanderson
2006-06-01
This report presents and discusses results from Task 5 of the study ''Fate of Mercury in Synthetic Gypsum Used for Wallboard Production,'' performed at a full-scale commercial wallboard plant. Synthetic gypsum produced by wet flue gas desulfurization (FGD) systems on coal-fired power plants is commonly used in the manufacture of wallboard. The FGD process is used to control the sulfur dioxide emissions which would result in acid rain if not controlled. This practice has long benefited the environment by recycling the FGD gypsum byproduct, which is becoming available in increasing quantities, decreasing the need to landfill this material, and increasingmore » the sustainable design of the wallboard product. However, new concerns have arisen as recent mercury control strategies developed for power plants involve the capture of mercury in FGD systems. The objective of this study is to determine whether any mercury is released into the atmosphere when the synthetic gypsum material is used as a feedstock for wallboard production. The project is being co-funded by the U.S. DOE National Energy Technology Laboratory (Cooperative Agreement DE-FC26-04NT42080), USG Corporation, and EPRI. USG Corporation is the prime contractor, and URS Group is a subcontractor. The project scope includes five discrete tasks, each conducted at various USG wallboard plants using synthetic gypsum from different FGD systems. The five tasks were to include (1) a baseline test, then variations representing differing power plant (2) emissions control configurations, (3) treatment of fine gypsum particles, (4) coal types, and (5) FGD reagent types. However, Task 5, which was to evaluate gypsum produced from an alternate FGD reagent, could not be conducted as planned. Instead, Task 5 was conducted at conditions similar to a previous task, Task 3, although with gypsum from an alternate FGD system. In this project, process stacks in the wallboard plant have been sampled using the Ontario Hydro method
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MERCURY-ATLAS (MA)-9 - SHEPARD, ALAN B., JR. ASTRONAUT - MERCURY CONTROL CENTER (MCC) - CAPE
1963-05-16
S63-07857 (15-16 May 1963) --- Astronaut Alan Shepard (left) and Walter C. Williams monitor progress of the Mercury Atlas 9 (MA-9) mission from Mercury Control Center, Cape Canaveral, Florida. Photo credit: NASA
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EVALUATION OF SCR CATALYSTS FOR COMBINED CONTROL OF NOX AND MERCURY
The report documents two-task, bench- and pilot-scale research on the effect of selective catalytic reduction (SCR) catalysts on mercury speciation in Illinois and Powder River Basin (PRB) coal combustion flue gases. In task I, a bench-scale reactor was used to study the oxidatio...
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THE EFFECT OF MERCURY CONTROLS ON WALLBOARD MANUFACTURE
DOE Office of Scientific and Technical Information (OSTI.GOV)
Sandra Meischen
2004-07-01
Pending EPA regulations may mandate 70 to 90% mercury removal efficiency from utility flue gas. A mercury control option is the trapping of oxidized mercury in wet flue gas desulfurization systems (FGD). The potential doubling of mercury in the FGD material and its effect on mercury volatility at temperatures common to wallboard manufacture is a concern that could limit the growing byproduct use of FGD material. Prediction of mercury fate is limited by lack of information on the mercury form in the FGD material. The parts per billion mercury concentrations prevent the identification of mercury compounds by common analytical methods.more » A sensitive analytical method, cold vapor atomic fluorescence, coupled with leaching and thermodecomposition methods were evaluated for their potential to identify mercury compounds in FGD material. The results of the study suggest that the mercury form is dominated by the calcium sulfate matrix and is probably associated with the sulfate form in the FGD material. Additionally, to determine the effect of high mercury concentration FGD material on wallboard manufacture, a laboratory FGD unit was built to trap the oxidized mercury generated in a simulated flue gas. Although the laboratory prepared FGD material did not contain the mercury concentrations anticipated, further thermal tests determined that mercury begins to evolve from FGD material at 380 to 390 F, consequently dropping the drying temperature should mitigate mercury evolution if necessary. Mercury evolution is also diminished as the weight of the wallboard sample increased. Consequently, mercury evolution may not be a significant problem in wallboard manufacture.« less
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NOVEL MERCURY OXIDANT AND SORBENT FOR MERCURY EMISSIONS CONTROL FROM COAL-FIRED POWER PLANTS
The authors have successfully developed novel efficient and cost-effective sorbent and oxidant for removing mercury from power plant flue gases. These sorbent and oxidant offer great promise for controlling mercury emissions from coal-fired power plants burning a wide range of c...
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Robust Control for the Mercury Laser Altimeter
NASA Technical Reports Server (NTRS)
Rosenberg, Jacob S.
2006-01-01
Mercury Laser Altimeter Science Algorithms is a software system for controlling the laser altimeter aboard the Messenger spacecraft, which is to enter into orbit about Mercury in 2011. The software will control the altimeter by dynamically modifying hardware inputs for gain, threshold, channel-disable flags, range-window start location, and range-window width, by using ranging information provided by the spacecraft and noise counts from instrument hardware. In addition, because of severe bandwidth restrictions, the software also selects returns for downlink.
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Wang, Fengyang; Wang, Shuxiao; Zhang, Lei; Yang, Hai; Gao, Wei; Wu, Qingru; Hao, Jiming
2016-05-01
The iron and steel production process is one of the predominant anthropogenic sources of atmospheric mercury emissions worldwide. In this study, field tests were conducted to study mercury emission characteristics and mass flows at two iron and steel plants in China. It was found that low-sulfur flue gas from sintering machines could contribute up to 41% of the total atmospheric mercury emissions, and desulfurization devices could remarkably help reduce the emissions. Coal gas burning accounted for 17%-49% of the total mercury emissions, and therefore the mercury control of coal gas burning, specifically for the power plant burning coal gas to generate electricity, was significantly important. The emissions from limestone and dolomite production and electric furnaces can contribute 29.3% and 4.2% of the total mercury emissions from iron and steel production. More attention should be paid to mercury emissions from these two processes. Blast furnace dust accounted for 27%-36% of the total mercury output for the whole iron and steel production process. The recycling of blast furnace dust could greatly increase the atmospheric mercury emissions and should not be conducted. The mercury emission factors for the coke oven, sintering machine and blast furnace were 0.039-0.047gHg/ton steel, and for the electric furnace it was 0.021gHg/ton steel. The predominant emission species was oxidized mercury, accounting for 59%-73% of total mercury emissions to air. Copyright © 2016. Published by Elsevier B.V.
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Demonstration of Mer-Cure Technology for Enhanced Mercury Control
DOE Office of Scientific and Technical Information (OSTI.GOV)
John Marion; Dave O'Neill; Kevin Taugher
2008-06-01
Alstom Power Inc. has completed a DOE/NETL-sponsored program (under DOE Cooperative Agreement No. De-FC26-07NT42776) to demonstrate Mer-Cure{trademark}, one of Alstom's mercury control technologies for coal-fired boilers. The Mer-Cure{trademark}system utilizes a small amount of Mer-Clean{trademark} sorbent that is injected into the flue gas stream for oxidation and adsorption of gaseous mercury. Mer-Clean{trademark} sorbents are carbon-based and prepared with chemical additives that promote oxidation and capture of mercury. The Mer-Cure{trademark} system is unique in that the sorbent is injected into an environment where the mercury capture kinetics is accelerated. The full-scale demonstration program originally included test campaigns at two host sites: LCRA's 480-MW{sub e} Fayette Unit No.3 and Reliant Energy's 190-MW{sub e} Shawville Unit No.3. The only demonstration tests actually done were the short-term tests at LCRA due to budget constraints. This report gives a summary of the demonstration testing at Fayette Unit No.3. The goals for this Mercury Round 3 program, established by DOE/NETL under the original solicitation, were to reduce the uncontrolled mercury emissions by 90% at a cost significantly less than 50% of the previous target ofmore » $$60,000/lb mercury removed. The results indicated that Mer-Cure{trademark} technology could achieve mercury removal of 90% based on uncontrolled stack emissions. The estimated costs for 90% mercury control, at a sorbent cost of $$0.75 to $2.00/lb respectively, were $13,400 to $18,700/lb Hg removed. In summary, the results from demonstration testing show that the goals established by DOE/NETL were met during this test program. The goal of 90% mercury reduction was achieved. Estimated mercury removal costs were 69-78% lower than the benchmark of $60,000/lb mercury removed, significantly less than 50% of the baseline removal cost.« less
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Mercury Capsule Construction at the NASA Lewis Research Center
1959-08-21
A NASA mechanic secures the afterbody to a Mercury capsule in the hangar at the Lewis Research Center. The capsule was one of two built at Lewis for the “Big Joe” launches scheduled for September 1959. The initial phase of Project Mercury consisted of a series of unmanned launches using the Air Force’s Redstone and Atlas boosters and the Langley-designed Little Joe boosters. The first Atlas launch, referred to as “Big Joe”, was a single attempt early in Project Mercury to use a full-scale Atlas booster to simulate the reentry of a mock-up Mercury capsule without actually placing it in orbit. The overall design of Big Joe had been completed by December 1958, and soon thereafter project manager Aleck Bond assigned NASA Lewis the task of designing the electronic instrumentation and automatic stabilization system. Lewis also constructed the capsule’s lower section, which contained a pressurized area with the electronics and two nitrogen tanks for the retrorockets. Lewis technicians were responsible for assembling the entire capsule: the General Electric heatshield, NASA Langley afterbody and recovery canister, and Lewis electronics and control systems. On June 9, 1959, the capsule was loaded on an air force transport aircraft and flown to Cape Canaveral. A team of 45 test operations personnel from Lewis followed the capsule to Florida and spent the ensuing months preparing it for launch. The launch took place in the early morning hours of September 9, 1959.
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Fate of Mercury in Synthetic Gypsum Used for Wallboard Production
DOE Office of Scientific and Technical Information (OSTI.GOV)
Jessica Sanderson
2007-12-31
This report presents and discusses results from the project 'Fate of Mercury in Synthetic Gypsum Used for Wallboard Production', performed at five different full-scale commercial wallboard plants. Synthetic gypsum produced by wet flue gas desulfurization (FGD) systems on coal-fired power plants is commonly used in the manufacture of wallboard. This practice has long benefited the environment by recycling the FGD gypsum byproduct, which is becoming available in increasing quantities, decreasing the need to landfill this material, and increasing the sustainable design of the wallboard product. However, new concerns have arisen as recent mercury control strategies involve the capture of mercurymore » in FGD systems. The objective of this study has been to determine whether any mercury is released into the atmosphere at wallboard manufacturing plants when the synthetic gypsum material is used as a feedstock for wallboard production. The project has been co-funded by the U.S. DOE National Energy Technology Laboratory (Cooperative Agreement DE-FC26-04NT42080), USG Corporation, and EPRI. USG Corporation is the prime contractor, and URS Group is a subcontractor. The project scope included seven discrete tasks, each including a test conducted at various USG wallboard plants using synthetic gypsum from different wet FGD systems. The project was originally composed of five tasks, which were to include (1) a base-case test, then variations representing differing power plant: (2) emissions control configurations, (3) treatment of fine gypsum particles, (4) coal types, and (5) FGD reagent types. However, Task 5,could not be conducted as planned and instead was conducted at conditions similar to Task 3. Subsequently an opportunity arose to test gypsum produced from the Task 5 FGD system, but with an additive expected to impact the stability of mercury, so Task 6 was added to the project. Finally, Task 7 was added to evaluate synthetic gypsum produced at a power plant from an
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Low-Cost Options for Moderate Levels of Mercury Control
DOE Office of Scientific and Technical Information (OSTI.GOV)
Sharon Sjostrom
2006-03-31
On March 15, 2005, EPA issued the Clean Air Mercury Rule, requiring phased-in reductions of mercury emissions from electric power generators. ADA-ES, Inc., with support from DOE/NETL and industry partners, is conducting evaluations of EPRI's TOXECON II{trademark} process and of high-temperature reagents and sorbents to determine the capabilities of sorbent/reagent injection, including activated carbon, for mercury control on different coals and air emissions control equipment configurations. DOE/NETL targets for total mercury removal are {ge}55% (lignite), {ge}65% (subbituminous), and {ge}80% (bituminous). Based on work done to date at various scales, meeting the removal targets appears feasible. However, work needs to progressmore » to more thoroughly document and test these promising technologies at full scale. This is the final site report for tests conducted at MidAmerican's Louisa Station, one of three sites evaluated in this DOE/NETL program. The other two sites in the program are MidAmerican's Council Bluff Station and Entergy's Independence Station. MidAmerican's Louisa Station burns Powder River Basin (PRB) coal and employs hot-side electrostatic precipitators with flue gas conditioning for particulate control. This part of the testing program evaluated the effect of reagents used in the existing flue gas conditioning on mercury removal.« less
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Mercury Emission Control Technologies for PPL Montana-Colstrip Testing
DOE Office of Scientific and Technical Information (OSTI.GOV)
John P. Kay; Michael L. Jones; Steven A. Benson
2007-04-01
The Energy & Environmental Research Center (EERC) was asked by PPL Montana LLC (PPL) to provide assistance and develop an approach to identify cost-effective options for mercury control at its coal-fired power plants. The work conducted focused on baseline mercury level and speciation measurement, short-term parametric testing, and week long testing of mercury control technology at Colstrip Unit 3. Three techniques and various combinations of these techniques were identified as viable options for mercury control. The options included oxidizing agents or sorbent enhancement additives (SEAs) such as chlorine-based SEA1 and an EERC proprietary SEA2 with and without activated carbon injection.more » Baseline mercury emissions from Colstrip Unit 3 are comparatively low relative to other Powder River Basin (PRB) coal-fired systems and were found to range from 5 to 6.5 g/Nm3 (2.9 to 3.8 lb/TBtu), with a rough value of approximately 80% being elemental upstream of the scrubber and higher than 95% being elemental at the outlet. Levels in the stack were also greater than 95% elemental. Baseline mercury removal across the scrubber is fairly variable but generally tends to be about 5% to 10%. Parametric results of carbon injection alone yielded minimal reduction in Hg emissions. SEA1 injection resulted in 20% additional reduction over baseline with the maximum rate of 400 ppm (3 gal/min). Week long testing was conducted with the combination of SEA2 and carbon, with injection rates of 75 ppm (10.3 lb/hr) and 1.5 lb/MMacf (40 lb/hr), respectively. Reduction was found to be an additional 30% and, overall during the testing period, was measured to be 38% across the scrubber. The novel additive injection method, known as novel SEA2, is several orders of magnitude safer and less expensive than current SEA2 injection methods. However, used in conjunction with this plant configuration, the technology did not demonstrate a significant level of mercury reduction. Near-future use of
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Low-Cost Options for Moderate Levels of Mercury Control
DOE Office of Scientific and Technical Information (OSTI.GOV)
Sharon Sjostrom
2008-02-09
This is the final technical report for a three-site project that is part of an overall program funded by the U.S. Department of Energy's National Energy Technology Laboratory (DOE/NETL) and industry partners to obtain the necessary information to assess the feasibility and costs of controlling mercury from coal-fired utility plants. This report summarizes results from tests conducted at MidAmerican's Louisa Generating Station and Entergy's Independence Steam Electric Station (ISES) and sorbent screening at MidAmerican's Council Bluffs Energy Center (CBEC) (subsequently renamed Walter Scott Energy Center (WSEC)). Detailed results for Independence and Louisa are presented in the respective Topical Reports. Asmore » no full-scale testing was conducted at CBEC, screening updates were provided in the quarterly updates to DOE. ADA-ES, Inc., with support from DOE/NETL, EPRI, and other industry partners, has conducted evaluations of EPRI's TOXECON II{trademark} process and of high-temperature reagents and sorbents to determine the capabilities of sorbent/reagent injection, including activated carbon, for mercury control on different coals and air emissions control equipment configurations. An overview of each plant configuration is presented: (1) MidAmerican's Louisa Generating Station burns Powder River Basin (PRB) coal in its 700-MW Unit 1 and employs hot-side electrostatic precipitators (ESPs) with flue gas conditioning for particulate control. This part of the testing program evaluated the effect of reagents used in the existing flue gas conditioning on mercury removal. (2) MidAmerican's Council Bluffs Energy Center typically burns PRB coal in its 88-MW Unit 2. It employs a hot-side ESP for particulate control. Solid sorbents were screened for hot-side injection. (3) Entergy's Independence Steam Electric Station typically burns PRB coal in its 880-MW Unit 2. Various sorbent injection tests were conducted on 1/8 to 1/32 of the flue gas stream either within or in front
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Economic analysis of atmospheric mercury emission control for coal-fired power plants in China.
Ancora, Maria Pia; Zhang, Lei; Wang, Shuxiao; Schreifels, Jeremy; Hao, Jiming
2015-07-01
Coal combustion and mercury pollution are closely linked, and this relationship is particularly relevant in China, the world's largest coal consumer. This paper begins with a summary of recent China-specific studies on mercury removal by air pollution control technologies and then provides an economic analysis of mercury abatement from these emission control technologies at coal-fired power plants in China. This includes a cost-effectiveness analysis at the enterprise and sector level in China using 2010 as a baseline and projecting out to 2020 and 2030. Of the control technologies evaluated, the most cost-effective is a fabric filter installed upstream of the wet flue gas desulfurization system (FF+WFGD). Halogen injection (HI) is also a cost-effective mercury-specific control strategy, although it has not yet reached commercial maturity. The sector-level analysis shows that 193 tons of mercury was removed in 2010 in China's coal-fired power sector, with annualized mercury emission control costs of 2.7 billion Chinese Yuan. Under a projected 2030 Emission Control (EC) scenario with stringent mercury limits compared to Business As Usual (BAU) scenario, the increase of selective catalytic reduction systems (SCR) and the use of HI could contribute to 39 tons of mercury removal at a cost of 3.8 billion CNY. The economic analysis presented in this paper offers insights on air pollution control technologies and practices for enhancing atmospheric mercury control that can aid decision-making in policy design and private-sector investments. Copyright © 2015. Published by Elsevier B.V.
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Potassium permanganate for mercury vapor environmental control
NASA Technical Reports Server (NTRS)
Kuivinen, D. E.
1972-01-01
Potassium permanganate (KMnO4) was evaluated for application in removing mercury vapor from exhaust air systems. The KMnO4 may be used in water solution with a liquid spray scrubber system or as a solid adsorber bed material when impregnated onto a zeolite. Air samples contaminated with as much as 112 mg/cu m of mercury were scrubbed to 0.06mg/cum with the KMnO4-impregnated zeolite (molecular sieve material). The water spray solution of permanganate was also found to be as effective as the impregnated zeolite. The KMnO4-impregnated zeolite was applied as a solid adsorber material to (1) a hardware decontamination system, (2) a model incinerator, and (3) a high vacuum chamber for ion engine testing with mercury as the propellant. A liquid scrubber system was also applied in an incinerator system. Based on the results of these experiments, it is concluded that the use of KMnO4 can be an effective method for controlling noxious mercury vapor.
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FUNDAMENTAL SCIENCE AND ENGINEERING OF MERCURY CONTROL IN COAL-FIRED POWER PLANTS
The paper discusses the existing knowledge base applicable to mercury (Hg) control in coal-fired boilers and outlines the gaps in knowledge that can be filled by experimentation and data gathering. Mercury can be controlled by existing air pollution control devices or by retrofit...
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Field Testing of a Wet FGD Additive for Enhanced Mercury Control
DOE Office of Scientific and Technical Information (OSTI.GOV)
Gary Blythe; MariJon Owens
2007-12-31
This document is the final report for DOE-NETL Cooperative Agreement DE-FC26-04NT42309, 'Field Testing of a Wet FGD Additive'. The objective of the project has been to demonstrate the use of two flue gas desulfurization (FGD) additives, Evonik Degussa Corporation's TMT-15 and Nalco Company's Nalco 8034, to prevent the re-emission of elemental mercury (Hg{sup 0}) in flue gas exiting wet FGD systems on coal-fired boilers. Furthermore, the project was intended to demonstrate whether such additives can be used to precipitate most of the mercury (Hg) removed in the wet FGD system as a fine salt that can be separated from themore » FGD liquor and bulk solid byproducts for separate disposal. The project involved pilot- and full-scale tests of the additives in wet FGD absorbers. The tests were intended to determine required additive dosages to prevent Hg{sup 0} re-emissions and to separate mercury from the normal FGD byproducts for three coal types: Texas lignite/Powder River Basin (PRB) coal blend, high-sulfur Eastern bituminous coal, and low-sulfur Eastern bituminous coal. The project team consists of URS Group, Inc., EPRI, Luminant Power (was TXU Generation Company LP), Southern Company, IPL (an AES company), Evonik Degussa Corporation and the Nalco Company. Luminant Power provided the Texas lignite/PRB co-fired test site for pilot FGD tests and project cost sharing. Southern Company provided the low-sulfur Eastern bituminous coal host site for wet scrubbing tests, the pilot- and full-scale jet bubbling reactor (JBR) FGD systems tested, and project cost sharing. IPL provided the high-sulfur Eastern bituminous coal full-scale FGD test site and cost sharing. Evonik Degussa Corporation provided the TMT-15 additive, and the Nalco Company provided the Nalco 8034 additive. Both companies also supplied technical support to the test program as in-kind cost sharing. The project was conducted in six tasks. Of the six tasks, Task 1 involved project planning and Task 6 involved
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MERCURY CONTROL TECHNOLOGY--A REVIEW
The U.S. Environmental Protection Agency has promulgated the Clean Air Mercury Rule (CAMR) to permanently cap and reduce mercury emissions in the U.S. This rule makes the U.S. the first country in the world to regulate mercury emissions from coal-fired power plants. The first p...
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JV Task 94 - Air Quality V: Mercury, Trace Elements, SO3, and Particulate Matter Conference
DOE Office of Scientific and Technical Information (OSTI.GOV)
Thomas A. Erickson
2007-01-31
This final report summarizes the planning, preparation, facilitation and production, and summary of the conference entitled 'Air Quality V: Mercury, Trace Elements, SO{sub 3}, and Particulate Matter,' held September 18-21, 2005, in Arlington, Virginia. The goal of the conference was to build on the discussions of the first four Air Quality Conferences, providing further opportunity for leading representatives of industry, government, research institutions, academia, and environmental organizations to discuss the key interrelationships between policy and science shaping near-term regulations and controls and to assist in moving forward on emerging issues that will lead to acceptable programs and policies to protectmore » human health, the environment, and economic growth. The conference was extremely timely, as it was the last large conference prior to publication of the U.S. Environmental Protection Agency's final regulations for mercury control from coal-fired utilities, and provided a forum to realistically assess the status of mercury controls in relation to the new regulations.« less
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Hu, Yuanan; Cheng, Hefa
2016-11-01
Coal burning in power plants and industrial boilers is the largest combustion source of mercury emissions in China. Together, power plants and industrial boilers emit around 250 tonnes of mercury each year, or around half of atmospheric mercury emissions from anthropogenic sources in the country. Power plants in China are generally equipped with multi-pollutant control technologies, which offer the co-benefit of mercury removal, while mercury-specific control technologies have been installed in some facilities. In contrast, most industrial boilers have only basic or no flue gas cleaning. A combination of measures, including energy conservation, coal switching and blending, reducing the mercury contents of coals through washing, combustion controls, and flue gas cleaning, can be used to reduce mercury emissions from these stationary combustion sources. More stringent emission standards for the major air pollutants from coal-fired power plants and industrial boiler, along with standards for the previously unregulated mercury, were implemented recently, which is expected to bring significant reduction in their mercury emissions through the necessary upgrades of multi-pollutant and mercury-specific control technologies. Meanwhile, strong monitoring capacity and strict enforcement are necessary to ensure that the combustion sources operate in compliance with the new emission standards and achieve significant reduction in the emissions of mercury and other air pollutants. Copyright © 2016 Elsevier Ltd. All rights reserved.
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1961-01-31
A three-year-old chimpanzee, named Ham, in the biopack couch for the MR-2 suborbital test flight. On January 31, 1961, a Mercury-Redstone launch from Cape Canaveral carried the chimpanzee "Ham" over 640 kilometers down range in an arching trajectory that reached a peak of 254 kilometers above the Earth. The mission was successful and Ham performed his lever-pulling task well in response to the flashing light. NASA used chimpanzees and other primates to test the Mercury Capsule before launching the first American astronaut Alan Shepard in May 1961. The successful flight and recovery confirmed the soundness of the Mercury-Redstone systems.
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1961-01-01
A three-year-old chimpanzee, named Ham, in the biopack couch for the MR-2 suborbital test flight. On January 31, 1961, a Mercury-Redstone launch from Cape Canaveral carried the chimpanzee "Ham" over 640 kilometers down range in an arching trajectory that reached a peak of 254 kilometers above the Earth. The mission was successful and Ham performed his lever-pulling task well in response to the flashing light. NASA used chimpanzees and other primates to test the Mercury Capsule before launching the first American astronaut Alan Shepard in May 1961. The successful flight and recovery confirmed the soundness of the Mercury-Redstone systems.
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Waterbury, Conn., Incinerator to Control Mercury Emissions
Emission control equipment to limit the discharge of mercury pollution to the atmosphere will be installed at an incinerator owned by the City of Waterbury, Conn., according to a proposed agreement between the city and federal government.
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Jones, Andrew P; Hoffmann, Jeffrey W; Smith, Dennis N; Feeley, Thomas J; Murphy, James T
2007-02-15
Based on results of field testing conducted by the U.S. Department of Energy's National Energy Technology Laboratory (DOE/NETL), this article provides preliminary costs for mercury control via conventional activated carbon injection (ACI), brominated ACI, and conventional ACI coupled with the application of a sorbent enhancement additive (SEA) to coal prior to combustion. The economic analyses are reported on a plant-specific basis in terms of the cost required to achieve low (50%), mid (70%), and high (90%) levels of mercury removal "above and beyond" the baseline mercury removal achieved by existing emission control equipment. In other words, the levels of mercury control are directly attributable to ACI. Mercury control costs via ACI have been amortized on a current dollar basis. Using a 20-year book life, levelized costs for the incremental increase in cost of electricity (COE), expressed in mills per kilowatt-hour (mills/kWh), and the incremental cost of mercury control, expressed in dollars per pound of mercury removed ($/lb Hg removed), have been calculated for each level of ACI mercury control. For this analysis, the increase in COE varied from 0.14 mills/kWh to 3.92 mills/kWh. Meanwhile, the incremental cost of mercury control ranged from $3810/lb Hg removed to $166000/lb Hg removed.
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BIOAVAILABILITY OF MERCURY IN SEDIMENTS FROM A FLOOD CONTROL RESERVOIR TO HYALELLA AZTECA
In the last three years, mercury contamination in North Mississippi flood control reservoirs has become a growing concern. Previous data indicate that three flood control reservoirs have similar total mercury sediment concentrations and that fish collected from one reservoir cont...
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Demonstration of An Integrated Approach to Mercury Control at Lee Station
DOE Office of Scientific and Technical Information (OSTI.GOV)
Vitali Lissianski; Pete Maly
2007-12-31
General Electric (GE) has developed an approach whereby native mercury reduction on fly ash can be improved by optimizing the combustion system. This approach eliminates carbon-rich areas in the combustion zone, making the combustion process more uniform, and allows increasing carbon content in fly ash without significant increase in CO emissions. Since boiler excess O{sub 2} can be also reduced as a result of optimized combustion, this process reduces NO{sub x} emissions. Because combustion optimization improves native mercury reduction on fly ash, it can reduce requirements for activated carbon injection (ACI) when integrated with sorbent injection for more efficient mercurymore » control. The approach can be tailored to specific unit configurations and coal types for optimal performance. This report describes results of a U.S. DOE sponsored project designed to evaluate the effect of combustion conditions on 'native' mercury capture on fly ash and integrate combustion optimization for improved mercury and NO{sub x} reduction with ACI. The technology evaluation took place in Lee Station Unit 3 located in Goldsboro, NC and operated by Progress Energy. Unit 3 burns a low-sulfur Eastern bituminous coal and is a 250 MW opposed-wall fired unit equipped with an ESP with a specific collection area of 249 ft{sup 2}/kacfm. Unit 3 is equipped with SO{sub 3} injection for ESP conditioning. The technical goal of the project was to evaluate the technology's ability to achieve 70% mercury reduction below the baseline emission value of 2.9 lb/TBtu, which was equivalent to 80% mercury reduction relative to the mercury concentration in the coal. The strategy to achieve the 70% incremental improvement in mercury removal in Unit 3 was (1) to enhance 'naturally' occurring fly ash mercury capture by optimizing the combustion process and using duct humidification to reduce flue gas temperatures at the ESP inlet, and (2) to use ACI in front of the ESP to further reduce mercury
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Solar wind controls on Mercury's magnetospheric cusp
NASA Astrophysics Data System (ADS)
He, Maosheng; Vogt, Joachim; Heyner, Daniel; Zhong, Jun
2017-06-01
This study assesses the response of the cusp to solar wind changes comprehensively, using 2848 orbits of MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) observation. The assessment entails four steps: (1) propose and validate an approach to estimate the solar wind magnetic field (interplanetary magnetic field (IMF)) for MESSENGER's cusp transit; (2) define an index σ measuring the intensity of the magnetic disturbance which significantly peaks within the cusp and serves as an indicator of the cusp activity level; (3) construct an empirical model of σ as a function of IMF and Mercury's heliocentric distance rsun, through linear regression; and (4) use the model to estimate and compare the polar distribution of the disturbance σ under different conditions for a systematic comparison. The comparison illustrates that the disturbance peak over the cusp is strongest and widest extending in local time for negative IMF Bx and negative IMF Bz, and when Mercury is around the perihelion. Azimuthal shifts are associated with both IMF By and rsun: the cusp moves toward dawn when IMF By or rsun decrease. These dependences are explained in terms of the IMF Bx-controlled dayside magnetospheric topology, the component reconnection model applied to IMF By and Bz, and the variability of solar wind ram pressure associated with heliocentric distance rsun. The applicability of the component reconnection model on IMF By indicates that at Mercury reconnection occurs at lower shear angles than at Earth.
Plain Language Summary<span class="hlt">Mercury</span>'s magnetosphere was suggested to be particularly sensitive to solar wind conditions. This study investigates the response of the magnetospheric cusp to solar wind conditions systematically. For this purpose, we analyze the statistical predictability of interplanetary magnetic field (IMF) at <span class="hlt">Mercury</span>, develop an approach for estimating the solar wind magnetic field (IMF) for <span class="hlt">MErcury</span> Surface</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhDT.......419S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhDT.......419S"><span>Modeling study of natural emissions, source apportionment, and emission <span class="hlt">control</span> of atmospheric <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shetty, Suraj K.</p> <p></p> <p>) and CAMNet (Canadian Atmospheric <span class="hlt">Mercury</span> Measurement Network). The model estimated a total deposition of 474 Mg yr-1 to the CONUS (Contiguous United States) domain, with two-thirds being dry deposited. Reactive gaseous <span class="hlt">mercury</span> contributed the most to 60% of deposition. Emission speciation distribution is a key factor for local deposition as contribution from large point sources can be as high as 75% near (< 100 km) the emission sources, indicating that emission reduction may result in direct deposition decrease near the source locations. Among the sources, BC contributes to about 68% to 91% of total deposition. Excluding the BC's contribution, EGU contributes to nearly 50% of deposition caused by CONUS emissions in the Northeast, Southeast and East Central regions, while emissions from natural processes are more important in the Pacific and West Central regions (contributing up to 40% of deposition). The modeling results implies that implementation of the new emission standards proposed by USEPA (United States Environmental Protection Agency) would significantly benefit regions that have larger contributions from EGU sources. <span class="hlt">Control</span> of <span class="hlt">mercury</span> emissions from coal combustion processes has attracted great attention due to its toxicity and the emission-<span class="hlt">control</span> regulations and has lead to advancement in state-of-the-art <span class="hlt">control</span> technologies that alleviate the impact of <span class="hlt">mercury</span> on ecosystem and human health. This part of the work applies a sorption model to simulate adsorption of <span class="hlt">mercury</span> in flue gases, onto a confined-bed of activated carbon. The model's performances were studied at various flue gas flow rates, inlet <span class="hlt">mercury</span> concentrations and adsorption bed temperatures. The process simulated a flue gas, with inlet <span class="hlt">mercury</span> concentration of 300 ppb, entering at a velocity of 0.3 m s-1 from the bottom into a fixed bed (inside bed diameter of 1 m and 3 m bed height; bed temperature of 25 °C) of activated carbon (particle size of 0.004 m with density of 0.5 g cm-3 and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/990812','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/990812"><span>JV <span class="hlt">Task</span> 96 - Phase 2 - Investigating the Importance of the <span class="hlt">Mercury</span>-Selenium Interaction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Nicholas Ralston; Laura Raymond</p> <p>2008-03-01</p> <p>In order to improve the understanding of the <span class="hlt">mercury</span> issue, it is vital to study <span class="hlt">mercury</span>'s effects on selenium physiology. While <span class="hlt">mercury</span> present in the environment or food sources may pose health risks, the protective effects of selenium have not been adequately considered in establishing regulatory policy. Numerous studies report that vulnerability to <span class="hlt">mercury</span> toxicity is inversely proportional to selenium status or level. However, selenium status has not been considered in the development of the reference dosage levels for <span class="hlt">mercury</span> exposure. Experimental animals fed low-selenium diets are far more vulnerable to <span class="hlt">mercury</span> toxicity than animals fed normal selenium, and animalsmore » fed selenium-rich diets are even more resistant. Selenium-dependent enzymes in brain and endocrine tissues can be impaired by excessive <span class="hlt">mercury</span> exposure, apparently because <span class="hlt">mercury</span> has an extremely high binding affinity for selenium. When selenium becomes bound to <span class="hlt">mercury</span>, it is unable to participate in the metabolic cycling of selenoprotein synthesis. Because of <span class="hlt">mercury</span>-dependent impairments of selenoprotein synthesis, various antioxidant and regulatory functions in brain biochemistry are compromised. This report details a 2-year multiclient-funded research program designed to examine the interactions between <span class="hlt">mercury</span> and selenium in animal models. The studies explored the effects of dietary intakes of toxic amounts of methylmercury and the protective effects of the normal dietary range of selenium in counteracting <span class="hlt">mercury</span> toxicity. This study finds that the amounts of selenium present in ocean fish are sufficient to protect against far larger quantities of methylmercury than those present in typical seafoods. Toxic effects of methylmercury exposure were not directly proportional to <span class="hlt">mercury</span> concentrations in blood, brain, or any other tissues. Instead, <span class="hlt">mercury</span> toxicity was proportional to molar ratios of <span class="hlt">mercury</span> relative to selenium. In order to accurately assess risk associated with</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018LPICo2047.6112B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018LPICo2047.6112B"><span>Experimental Investigation of Chromium Behavior During <span class="hlt">Mercury</span>'s Differentiation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boujibar, A.; Nittler, L. R.; Chabot, N.; McCubbin, F. M.; Righter, K.; Vander Kaaden, K. E.; McCoy, T. J.</p> <p>2018-05-01</p> <p>We use experimental data on Cr partitioning and its concentration on <span class="hlt">Mercury</span>'s surface to constrain on <span class="hlt">Mercury</span>'s oxidation state. We found that <span class="hlt">Mercury</span>'s bulk Cr composition can be chondritic and its core segregated at an fO2 of IW- <span class="hlt">4.5</span> to IW-3.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20090040616&hterms=Digestive&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DDigestive','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20090040616&hterms=Digestive&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DDigestive"><span>Got <span class="hlt">Mercury</span>?</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Meyers, Valerie E.; McCoy, J. Torin; Garcia, Hector D.; James, John T.</p> <p>2009-01-01</p> <p>Many of the operational and payload lighting units used in various spacecraft contain elemental <span class="hlt">mercury</span>. If these devices were damaged on-orbit, elemental <span class="hlt">mercury</span> could be released into the cabin. Although there are plans to replace operational units with alternate light sources, such as LEDs, that do not contain <span class="hlt">mercury</span>, <span class="hlt">mercury</span>-containing lamps efficiently produce high quality illumination and may never be completely replaced on orbit. Therefore, exposure to elemental <span class="hlt">mercury</span> during spaceflight will remain possible and represents a toxicological hazard. Elemental <span class="hlt">mercury</span> is a liquid metal that vaporizes slowly at room temperature. However, it may be completely vaporized at the elevated operating temperatures of lamps. Although liquid <span class="hlt">mercury</span> is not readily absorbed through the skin or digestive tract, <span class="hlt">mercury</span> vapors are efficiently absorbed through the respiratory tract. Therefore, the amount of <span class="hlt">mercury</span> in the vapor form must be estimated. For <span class="hlt">mercury</span> releases from lamps that are not being operated, we utilized a study conducted by the New Jersey Department of Environmental Quality to calculate the amount of <span class="hlt">mercury</span> vapor expected to form over a 2-week period. For longer missions and for <span class="hlt">mercury</span> releases occurring when lamps are operating, we conservatively assumed complete volatilization of the available <span class="hlt">mercury</span>. Because current spacecraft environmental <span class="hlt">control</span> systems are unable to remove <span class="hlt">mercury</span> vapors, both short-term and long-term exposures to <span class="hlt">mercury</span> vapors are possible. Acute exposure to high concentrations of <span class="hlt">mercury</span> vapors can cause irritation of the respiratory tract and behavioral symptoms, such as irritability and hyperactivity. Chronic exposure can result in damage to the nervous system (tremors, memory loss, insomnia, etc.) and kidneys (proteinurea). Therefore, the JSC Toxicology Group recommends that stringent safety <span class="hlt">controls</span> and verifications (vibrational testing, etc.) be applied to any hardware that contains elemental <span class="hlt">mercury</span> that could yield</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/903324','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/903324"><span>Field Testing of a Wet FGD Additive for Enhanced <span class="hlt">Mercury</span> <span class="hlt">Control</span> - Pilot-Scale Test Results</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Gary M. Blythe</p> <p>2006-03-01</p> <p>This Topical Report summarizes progress on Cooperative Agreement DE-FC26-04NT42309, ''Field Testing of a Wet FGD Additive.'' The objective of the project is to demonstrate the use of a flue gas desulfurization (FGD) additive, Degussa Corporation's TMT-15, to prevent the reemissions of elemental <span class="hlt">mercury</span> (Hg{sup 0}) in flue gas exiting wet FGD systems on coal-fired boilers. Furthermore, the project intends to demonstrate that the additive can be used to precipitate most of the <span class="hlt">mercury</span> (Hg) removed in the wet FGD system as a fine TMT salt that can be separated from the FGD liquor and bulk solid byproducts for separate disposal.more » The project will conduct pilot and full-scale tests of the TMT-15 additive in wet FGD absorbers. The tests are intended to determine required additive dosage requirements to prevent Hg{sup 0} reemissions and to separate <span class="hlt">mercury</span> from the normal FGD byproducts for three coal types: Texas lignite/Power River Basin (PRB) coal blend, high-sulfur Eastern bituminous coal, and low-sulfur Eastern bituminous coal. The project team consists of URS Group, Inc., EPRI, TXU Generation Company LP, Southern Company, and Degussa Corporation. TXU Generation has provided the Texas lignite/PRB co-fired test site for pilot FGD tests, Monticello Steam Electric Station Unit 3. Southern Company is providing the low-sulfur Eastern bituminous coal host site for wet scrubbing tests, as well as the pilot and full-scale jet bubbling reactor (JBR) FGD systems to be tested. A third utility, to be named later, will provide the high-sulfur Eastern bituminous coal full-scale FGD test site. Degussa Corporation is providing the TMT-15 additive and technical support to the test program. The project is being conducted in six <span class="hlt">tasks</span>. Of the six project <span class="hlt">tasks</span>, <span class="hlt">Task</span> 1 involves project planning and <span class="hlt">Task</span> 6 involves management and reporting. The other four <span class="hlt">tasks</span> involve field testing on FGD systems, either at pilot or full scale. The four <span class="hlt">tasks</span> include: <span class="hlt">Task</span> 2 - Pilot Additive</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li class="active"><span>2</span></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_2 --> <div id="page_3" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="41"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/875084','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/875084"><span>Alkaline sorbent injection for <span class="hlt">mercury</span> <span class="hlt">control</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Madden, Deborah A.; Holmes, Michael J.</p> <p>2003-01-01</p> <p>A <span class="hlt">mercury</span> removal system for removing <span class="hlt">mercury</span> from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a power plant system at one or more locations to remove at least between about 40% and 60% of the <span class="hlt">mercury</span> content from combustion flue gases. Small amounts of alkaline sorbents are injected into the flue gas stream at a relatively low rate. A particulate filter is used to remove <span class="hlt">mercury</span>-containing particles downstream of each injection point used in the power plant system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/874349','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/874349"><span>Alkaline sorbent injection for <span class="hlt">mercury</span> <span class="hlt">control</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Madden, Deborah A.; Holmes, Michael J.</p> <p>2002-01-01</p> <p>A <span class="hlt">mercury</span> removal system for removing <span class="hlt">mercury</span> from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a power plant system at one or more locations to remove at least between about 40% and 60% of the <span class="hlt">mercury</span> content from combustion flue gases. Small amounts of alkaline sorbents are injected into the flue gas stream at a relatively low rate. A particulate filter is used to remove <span class="hlt">mercury</span>-containing particles downstream of each injection point used in the power plant system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28858755','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28858755"><span>Calls to Florida Poison <span class="hlt">Control</span> Centers about <span class="hlt">mercury</span>: Trends over 2003-2013.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gribble, Matthew O; Deshpande, Aniruddha; Stephan, Wendy B; Hunter, Candis M; Weisman, Richard S</p> <p>2017-11-01</p> <p>The aim of this analysis was to contrast trends in exposure-report calls and informational queries (a measure of public interest) about <span class="hlt">mercury</span> to the Florida Poison <span class="hlt">Control</span> Centers over 2003-2013. Poison-<span class="hlt">control</span> specialists coded calls to Florida Poison <span class="hlt">Control</span> Centers by substance of concern, caller demographics, and whether the call pertained to an exposure event or was an informational query. For the present study, call records regarding <span class="hlt">mercury</span> were de-identified and provided along with daily total number of calls for statistical analysis. We fit Poisson models using generalized estimating equations to summarize changes across years in counts of daily calls to Florida Poison <span class="hlt">Control</span> Centers, adjusting for month. In a second stage of analysis, we further adjusted for the total number of calls each day. We also conducted analyses stratified by age of the exposed. There was an overall decrease over 2003-2013 in the number of total calls about <span class="hlt">mercury</span> [Ratio per year: 0.89, 95% CI: (0.88, 0.90)], and calls about <span class="hlt">mercury</span> exposure [Ratio per year: 0.84, 95% CI: (0.83, 0.85)], but the number of informational queries about <span class="hlt">mercury</span> increased over this time [Ratio per year: 1.15 (95% CI: 1.12, 1.18)]. After adjusting for the number of calls of that type each day (e.g., call volume), the associations remained similar: a ratio of 0.88 (95% CI: 0.87, 0.89) per year for total calls, 0.85 (0.83, 0.86) for exposure-related calls, and 1.17 (1.14, 1.21) for informational queries. Although, the number of exposure-related calls decreased, informational queries increased over 2003-2013. This might suggest an increased public interest in <span class="hlt">mercury</span> health risks despite a decrease in reported exposures over this time period. Copyright © 2017 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28502050','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28502050"><span>Biogeochemical <span class="hlt">controls</span> on <span class="hlt">mercury</span> methylation in the Allequash Creek wetland.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Creswell, Joel E; Shafer, Martin M; Babiarz, Christopher L; Tan, Sue-Zanne; Musinsky, Abbey L; Schott, Trevor H; Roden, Eric E; Armstrong, David E</p> <p>2017-06-01</p> <p>We measured <span class="hlt">mercury</span> methylation potentials and a suite of related biogeochemical parameters in sediment cores and porewater from two geochemically distinct sites in the Allequash Creek wetland, northern Wisconsin, USA. We found a high degree of spatial variability in the methylation rate potentials but no significant differences between the two sites. We identified the primary geochemical factors <span class="hlt">controlling</span> net methylmercury production at this site to be acid-volatile sulfide, dissolved organic carbon, total dissolved iron, and porewater iron(II). Season and demethylation rates also appear to regulate net methylmercury production. Our equilibrium speciation modeling demonstrated that sulfide likely regulated methylation rates by <span class="hlt">controlling</span> the speciation of inorganic <span class="hlt">mercury</span> and therefore its bioavailability to methylating bacteria. We found that no individual geochemical parameter could explain a significant amount of the observed variability in <span class="hlt">mercury</span> methylation rates, but we found significant multivariate relationships, supporting the widely held understanding that net methylmercury production is balance of several simultaneously occurring processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20397418','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20397418"><span>Evaluation of <span class="hlt">mercury</span> speciation and removal through air pollution <span class="hlt">control</span> devices of a 190 MW boiler.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wu, Chengli; Cao, Yan; Dong, Zhongbing; Cheng, Chinmin; Li, Hanxu; Pan, Weiping</p> <p>2010-01-01</p> <p>Air pollution <span class="hlt">control</span> devices (APCDs) are installed at coal-fired power plants for air pollutant regulation. Selective catalytic reduction (SCR) and wet flue gas desulfurization (FGD) systems have the co-benefits of air pollutant and <span class="hlt">mercury</span> removal. Configuration and operational conditions of APCDs and <span class="hlt">mercury</span> speciation affect <span class="hlt">mercury</span> removal efficiently at coal-fired utilities. The Ontario Hydro Method (OHM) recommended by the U.S. Environmental Protection Agency (EPA) was used to determine <span class="hlt">mercury</span> speciation simultaneously at five sampling locations through SCR-ESP-FGD at a 190 MW unit. Chlorine in coal had been suggested as a factor affecting the <span class="hlt">mercury</span> speciation in flue gas; and low-chlorine coal was purported to produce less oxidized <span class="hlt">mercury</span> (Hg2+) and more elemental <span class="hlt">mercury</span> (Hg0) at the SCR inlet compared to higher chlorine coal. SCR could oxidize elemental <span class="hlt">mercury</span> into oxidized <span class="hlt">mercury</span> when SCR was in service, and oxidation efficiency reached 71.0%. Therefore, oxidized <span class="hlt">mercury</span> removal efficiency was enhanced through a wet FGD system. In the non-ozone season, about 89.5%-96.8% of oxidized <span class="hlt">mercury</span> was <span class="hlt">controlled</span>, but only 54.9%-68.8% of the total <span class="hlt">mercury</span> was captured through wet FGD. Oxidized <span class="hlt">mercury</span> removal efficiency was 95.9%-98.0%, and there was a big difference in the total <span class="hlt">mercury</span> removal efficiencies from 78.0% to 90.2% in the ozone season. <span class="hlt">Mercury</span> mass balance was evaluated to validate reliability of OHM testing data, and the ratio of <span class="hlt">mercury</span> input in the coal to <span class="hlt">mercury</span> output at the stack was from 0.84 to 1.08.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19880048264&hterms=control+group+experimental&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dcontrol%2Bgroup%2Bexperimental','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19880048264&hterms=control+group+experimental&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dcontrol%2Bgroup%2Bexperimental"><span>Part-<span class="hlt">task</span> vs. whole-<span class="hlt">task</span> training on a supervisory <span class="hlt">control</span> <span class="hlt">task</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Battiste, Vernol</p> <p>1987-01-01</p> <p>The efficacy of a part-<span class="hlt">task</span> training for the psychomotor portion of a supervisory <span class="hlt">control</span> simulation was compared to that of the whole-<span class="hlt">task</span> training, using six subjects in each group, who were asked to perform a <span class="hlt">task</span> as quickly as possible. Part-<span class="hlt">task</span> training was provided with the cursor-<span class="hlt">control</span> device prior to transition to the whole-<span class="hlt">task</span>. The analysis of both the training and experimental trials demonstrated a significant performance advantage for the part-<span class="hlt">task</span> group: the <span class="hlt">tasks</span> were performed better and at higher speed. Although the subjects finally achieved the same level of performance in terms of score, the part-<span class="hlt">task</span> method was preferable for economic reasons, since simple pretraining systems are significantly less expensive than the whole-<span class="hlt">task</span> training systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/990804','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/990804"><span>JV <span class="hlt">Task</span> 124 - Understanding Multi-Interactions of SO3, <span class="hlt">Mercury</span>, Selenium, and Arsenic in Illinois Coal Flue Gas</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Ye Zhuang; Christopher Martin; John Pavlish</p> <p>2009-03-31</p> <p>This project consisted of pilot-scale combustion testing with a representative Illinois basin coal to explore the multi-interactions of SO{sub 3}, <span class="hlt">mercury</span>, selenium and arsenic. The parameters investigated for SO{sub 3} and <span class="hlt">mercury</span> interactions included different flue gas conditions, i.e., temperature, moisture content, and particulate alkali content, both with and without activated carbon injection for <span class="hlt">mercury</span> <span class="hlt">control</span>. Measurements were also made to track the transformation of selenium and arsenic partitioning as a function of flue gas temperature through the system. The results from the <span class="hlt">mercury</span>-SO{sub 3} testing support the concept that SO{sub 3} vapor is the predominant factor that impedes efficientmore » <span class="hlt">mercury</span> removal with activated carbon in an Illinois coal flue gas, while H{sub 2}SO{sub 4} aerosol has less impact on activated carbon injection performance. Injection of a suitably mobile and reactive additives such as sodium- or calcium-based sorbents was the most effective strategy tested to mitigate the effect of SO{sub 3}. Transformation measurements indicate a significant fraction of selenium was associated with the vapor phase at the electrostatic precipitator inlet temperature. Arsenic was primarily particulate-bound and should be captured effectively with existing particulate <span class="hlt">control</span> technology.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1039984','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1039984"><span>Subtask 4.8 - Fate and <span class="hlt">Control</span> of <span class="hlt">Mercury</span> and Trace Elements</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Pavlish, John; Lentz, Nicholas; Martin, Christopher</p> <p>2011-12-31</p> <p>The Center for Air Toxic Metals® (CATM®) Program at the Energy & Environmental Research Center (EERC) continues to focus on vital basic and applied research related to the fate, behavior, measurement, and <span class="hlt">control</span> of trace metals, especially <span class="hlt">mercury</span>, and the impact that these trace metals have on human health and the environment. For years, the CATM Program has maintained an international perspective, performing research and providing results that apply to both domestic and international audiences, with reports distributed in the United States and abroad. In addition to trace metals, CATM’s research focuses on other related emissions and issues that impactmore » trace metal releases to the environment, such as SO x, NO x, CO 2, ash, and wastewater streams. Of paramount interest and focus has been performing research that continues to enable the power and industrial sectors to operate in an environmentally responsible manner to meet regulatory standards. The research funded by the U.S. Department of Energy’s (DOE’s) National Energy Technology Laboratory (NETL) through CATM has allowed significant strides to be made to gain a better understanding of trace metals and other emissions, improve sampling and measurement techniques, fill data gaps, address emerging technical issues, and develop/test <span class="hlt">control</span> technologies that allow industry to cost-effectively meet regulatory standards. The DOE NETL–CATM research specifically focused on the fate and <span class="hlt">control</span> of <span class="hlt">mercury</span> and trace elements in power systems that use CO 2 <span class="hlt">control</span> technologies, such as oxycombustion and gasification systems, which are expected to be among those technologies that will be used to address climate change issues. In addition, research addressed data gaps for systems that use conventional and multipollutant <span class="hlt">control</span> technologies, such as electrostatic precipitators, selective catalytic reduction units, flue gas desulfurization systems, and flue gas-conditioning methods, to understand <span class="hlt">mercury</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11032137','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11032137"><span>Assessment of atmospheric <span class="hlt">mercury</span> emissions in Finland</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mukherjee; Melanen; Ekqvist; Verta</p> <p>2000-10-02</p> <p>This paper is part of the study of atmospheric emissions of heavy metals conducted by the Finnish Environment Institute in collaboration with the Technical Research Centre of Finland (VTT) under the umbrella of the Finnish Ministry of the Environment. The scope of our study is limited solely to anthropogenic <span class="hlt">mercury</span> that is emitted directly to the atmosphere. This article addresses emission factors and trends of atmospheric <span class="hlt">mercury</span> emissions during the 1990s and is based mainly on the database of the Finnish Environmental Administration. In addition, data based on the measurements taken by the VTT regarding emission factors have been used to estimate emissions of <span class="hlt">mercury</span> from the incineration of waste. The study indicates that the total emission of <span class="hlt">mercury</span> has decreased from 1140 kg in 1990 to 620 kg in 1997, while industrial and energy production have been on the increase simultaneously. The <span class="hlt">45</span>% emission reduction is due to improved gas cleaning equipment, process changes, automation, the installation of flue gas desulfurization process in coal-fired power plants and strict pollution <span class="hlt">control</span> laws. In the past, some authors have estimated a higher <span class="hlt">mercury</span> emission in Finland. In this study, it is also observed that there are no big changes in the quality of raw materials. Estimated emission factors can be of great help to management for estimating <span class="hlt">mercury</span> emissions and also its risk assessment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4720344','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4720344"><span>Benefits of <span class="hlt">mercury</span> <span class="hlt">controls</span> for the United States</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Selin, Noelle E.</p> <p>2016-01-01</p> <p><span class="hlt">Mercury</span> pollution poses risks for both human and ecosystem health. As a consequence, <span class="hlt">controlling</span> <span class="hlt">mercury</span> pollution has become a policy goal on both global and national scales. We developed an assessment method linking global-scale atmospheric chemical transport modeling to regional-scale economic modeling to consistently evaluate the potential benefits to the United States of global (UN Minamata Convention on <span class="hlt">Mercury</span>) and domestic [<span class="hlt">Mercury</span> and Air Toxics Standards (MATS)] policies, framed as economic gains from avoiding <span class="hlt">mercury</span>-related adverse health endpoints. This method attempts to trace the policies-to-impacts path while taking into account uncertainties and knowledge gaps with policy-appropriate bounding assumptions. We project that cumulative lifetime benefits from the Minamata Convention for individuals affected by 2050 are $339 billion (2005 USD), with a range from $1.4 billion to $575 billion in our sensitivity scenarios. Cumulative economy-wide benefits to the United States, realized by 2050, are $104 billion, with a range from $6 million to $171 billion. Projected Minamata benefits are more than twice those projected from the domestic policy. This relative benefit is robust to several uncertainties and variabilities, with the ratio of benefits (Minamata/MATS) ranging from ≈1.4 to 3. However, we find that for those consuming locally caught freshwater fish from the United States, rather than marine and estuarine fish from the global market, benefits are larger from US than global action, suggesting domestic policies are important for protecting these populations. Per megagram of prevented emissions, our domestic policy scenario results in US benefits about an order of magnitude higher than from our global scenario, further highlighting the importance of domestic action. PMID:26712021</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26712021','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26712021"><span>Benefits of <span class="hlt">mercury</span> <span class="hlt">controls</span> for the United States.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Giang, Amanda; Selin, Noelle E</p> <p>2016-01-12</p> <p><span class="hlt">Mercury</span> pollution poses risks for both human and ecosystem health. As a consequence, <span class="hlt">controlling</span> <span class="hlt">mercury</span> pollution has become a policy goal on both global and national scales. We developed an assessment method linking global-scale atmospheric chemical transport modeling to regional-scale economic modeling to consistently evaluate the potential benefits to the United States of global (UN Minamata Convention on <span class="hlt">Mercury</span>) and domestic [<span class="hlt">Mercury</span> and Air Toxics Standards (MATS)] policies, framed as economic gains from avoiding <span class="hlt">mercury</span>-related adverse health endpoints. This method attempts to trace the policies-to-impacts path while taking into account uncertainties and knowledge gaps with policy-appropriate bounding assumptions. We project that cumulative lifetime benefits from the Minamata Convention for individuals affected by 2050 are $339 billion (2005 USD), with a range from $1.4 billion to $575 billion in our sensitivity scenarios. Cumulative economy-wide benefits to the United States, realized by 2050, are $104 billion, with a range from $6 million to $171 billion. Projected Minamata benefits are more than twice those projected from the domestic policy. This relative benefit is robust to several uncertainties and variabilities, with the ratio of benefits (Minamata/MATS) ranging from ≈1.4 to 3. However, we find that for those consuming locally caught freshwater fish from the United States, rather than marine and estuarine fish from the global market, benefits are larger from US than global action, suggesting domestic policies are important for protecting these populations. Per megagram of prevented emissions, our domestic policy scenario results in US benefits about an order of magnitude higher than from our global scenario, further highlighting the importance of domestic action.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=174723&Lab=NRMRL&keyword=plants+AND+used+AND+reduce+AND+air+AND+pollution&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=174723&Lab=NRMRL&keyword=plants+AND+used+AND+reduce+AND+air+AND+pollution&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span> FOR COAL-FIRED POWER PLANTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>There are many sources of natural and anthropogenic <span class="hlt">mercury</span> emissions, but combustion of coal is known to be the major anthropogenic source of <span class="hlt">mercury</span> (Hg) emissions in the U.S. and world wide. To address this, EPA has recently promulgated the Clean Air <span class="hlt">Mercury</span> Rule to reduce Hg ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=115367&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=115367&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span> IN MUNICIPAL WASTE COMBUSTORS AND COAL-FIRED UTILITIES</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p><span class="hlt">Control</span> of <span class="hlt">mercury</span> (Hg) emissions from municipal waste combustors (MWCs) and coal-fired utilities has attracted attention due to current and potential regulations. Among several techniques evaluated for Hg <span class="hlt">control</span>, dry sorbent injection (primarily injection of activated carbon) h...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61641&keyword=peru&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=61641&keyword=peru&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>INITIATIVES AND TREATMENT OF <span class="hlt">MERCURY</span> IN ABANDONED MINES</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>This presentation discusses EPA's research activities and mitigation activities for <span class="hlt">mercury</span> contaminated mine sites at the International meeting on <span class="hlt">mercury</span> and artisanal gold mining in Lima, Peru. The topics discussed included the toxicological and enviornmental <span class="hlt">tasks</span> associated ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://escholarship.org/uc/item/15j0b0z4#page-1','USGSPUBS'); return false;" href="http://escholarship.org/uc/item/15j0b0z4#page-1"><span><span class="hlt">Mercury</span>-contaminated hydraulic mining debris in San Francisco Bay</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Bouse, Robin M.; Fuller, Christopher C.; Luoma, Samuel N.; Hornberger, Michelle I.; Jaffe, Bruce E.; Smith, Richard E.</p> <p>2010-01-01</p> <p><span class="hlt">Mercury</span> concentrations in pre-Gold Rush sediment range between 0.03 and 0.08 μg g-1. In core sediments that have characteristics of the gold deposits and were deposited during the time of hydraulic mining, <span class="hlt">mercury</span> concentrations can be up to 0.<span class="hlt">45</span> μg/g. Modern sediment (post-1952 deposition) contains <span class="hlt">mercury</span> concentrations up to 0.79 μg/g and is likely a mix of hydraulic mining <span class="hlt">mercury</span> and <span class="hlt">mercury</span> introduced from other sources.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100011391','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100011391"><span>Got <span class="hlt">Mercury</span>?</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Meyers, Valerie; James, John T.; McCoy, Torin; Garcia, Hector</p> <p>2010-01-01</p> <p>Many lamps used in various spacecraft contain elemental <span class="hlt">mercury</span>, which is efficiently absorbed through the lungs as a vapor. The liquid metal vaporizes slowly at room temperature, but may be completely vaporized when lamps are operating. Because current spacecraft environmental <span class="hlt">control</span> systems are unable to remove <span class="hlt">mercury</span> vapors, we considered short-term and long-term exposures. Using an existing study, we estimated <span class="hlt">mercury</span> vapor releases from lamps that are not in operation during missions lasting less than or equal to 30 days; whereas we conservatively assumed complete vaporization from lamps that are operating or being used during missions lasing more than 30 days. Based on <span class="hlt">mercury</span> toxicity, the Johnson Space Center's Toxicology Group recommends stringent safety <span class="hlt">controls</span> and verifications for any hardware containing elemental <span class="hlt">mercury</span> that could yield airborne <span class="hlt">mercury</span> vapor concentrations greater than 0.1 mg/m3 in the total spacecraft atmosphere for exposures lasting less than or equal to 30 days, or concentrations greater than 0.01 mg/m3 for exposures lasting more than 30 days.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1367847','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1367847"><span>Personality Traits in Miners with Past Occupational Elemental <span class="hlt">Mercury</span> Exposure</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Grum, Darja Kobal; Kobal, Alfred B.; Arnerič, Niko; Horvat, Milena; Ženko, Bernard; Džeroski, Sašo; Osredkar, Joško</p> <p>2006-01-01</p> <p>In this study, we evaluated the impact of long-term occupational exposure to elemental <span class="hlt">mercury</span> vapor (Hg0) on the personality traits of ex-<span class="hlt">mercury</span> miners. Study groups included 53 ex-miners previously exposed to Hg0 and 53 age-matched <span class="hlt">controls</span>. Miners and <span class="hlt">controls</span> completed the self-reporting Eysenck Personality Questionnaire and the Emotional States Questionnaire. The relationship between the indices of past occupational exposure and the observed personality traits was evaluated using Pearson’s correlation coefficient and on a subgroup level by machine learning methods (regression trees). The ex-<span class="hlt">mercury</span> miners were intermittently exposed to Hg0 for a period of 7–31 years. The means of exposure-cycle urine <span class="hlt">mercury</span> (U-Hg) concentrations ranged from 20 to 120 μg/L. The results obtained indicate that ex-miners tend to be more introverted and sincere, more depressive, more rigid in expressing their emotions and are likely to have more negative self-concepts than <span class="hlt">controls</span>, but no correlations were found with the indices of past occupational exposure. Despite certain limitations, results obtained by the regression tree suggest that higher alcohol consumption per se and long-term intermittent, moderate exposure to Hg0 (exposure cycle mean U-Hg concentrations > 38.7 < 53.5 μg/L) in interaction with alcohol remain a plausible explanation for the depression associated with negative self-concept found in subgroups of ex-<span class="hlt">mercury</span> miners. This could be one of the reason for the higher risk of suicide among miners of the Idrija <span class="hlt">Mercury</span> Mine in the last <span class="hlt">45</span> years. PMID:16451870</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/2299','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/2299"><span>Novel Process for Removal and Recovery of Vapor Phase <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Greenwell, Collin; Roberts, Daryl L; Albiston, Jason</p> <p></p> <p>We demonstrated in the Phase I program all key attributes of a new technology for removing <span class="hlt">mercury</span> from flue gases, namely, a) removal of greater than 95% of both elemental and oxidized forms of <span class="hlt">mercury</span>, both in the laboratory and in the field b) regenerability of the sorbent c) ability to scale up, and d) favorable economics. The Phase I program consisted of four <span class="hlt">tasks</span> other than project reporting: <span class="hlt">Task</span> I-1 Screen Sorbent Configurations in the Laboratory <span class="hlt">Task</span> I-2 Design and Fabricate Bench-Scale Equipment <span class="hlt">Task</span> I-3 Test Bench-Scale Equipment on Pilot Combustor <span class="hlt">Task</span> I-4 Evaluate Economics Based on Bench-Scale Resultsmore » In <span class="hlt">Task</span> I-1, we demonstrated that the sorbents are thermally durable and are regenerable through at least 55 cycles of <span class="hlt">mercury</span> uptake and desorption. We also demonstrated two low-pressure- drop configurations of the sorbent, namely, a particulate form and a monolithic form. We showed that the particulate form of the sorbent would take up 100% of the <span class="hlt">mercury</span> so long as the residence time in a bed of the sorbent exceeded 0.1 seconds. In principle, the particulate form of the sorbent could be imbedded in the back side of a higher temperature bag filter in a full-scale application. With typical bag face velocities of four feet per minute, the thickness of the particulate layer would need to be about 2000 microns to accomplish the uptake of the <span class="hlt">mercury</span>. For heat transfer efficiency, however, we believed the monolithic form of the sorbent would be the more practical in a full scale application. Therefore, we purchased commercially-available metallic monoliths and applied the sorbent to the inside of the flow channels of the monoliths. At face velocities we tested (up to 1.5 ft/sec), these monoliths had less than 0.05 inches of water pressure drop. We tested the monolithic form of the sorbent through 21 cycles of <span class="hlt">mercury</span> sorption and desorption in the laboratory and included a test of simultaneous uptake of both <span class="hlt">mercury</span> and mercuric chloride. Overall</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2584016','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2584016"><span>Feeding mice with diets containing <span class="hlt">mercury</span>-contaminated fish flesh from French Guiana: a model for the <span class="hlt">mercurial</span> intoxication of the Wayana Amerindians</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Bourdineaud, Jean-Paul; Bellance, Nadège; Bénard, Giovani; Brèthes, Daniel; Fujimura, Masatake; Gonzalez, Patrice; Marighetto, Aline; Maury-Brachet, Régine; Mormède, Cécile; Pédron, Vanessa; Philippin, Jean-Nicolas; Rossignol, Rodrigue; Rostène, William; Sawada, Masumi; Laclau, Muriel</p> <p>2008-01-01</p> <p>Background In 2005, 84% of Wayana Amerindians living in the upper marshes of the Maroni River in French Guiana presented a hair <span class="hlt">mercury</span> concentration exceeding the limit set up by the World Health Organization (10 μg/g). To determine whether this <span class="hlt">mercurial</span> contamination was harmful, mice have been fed diets prepared by incorporation of <span class="hlt">mercury</span>-polluted fish from French Guiana. Methods Four diets containing 0, 0.1, 1, and 7.5% fish flesh, representing 0, 5, 62, and 520 ng methylmercury per g, respectively, were given to four groups of mice for a month. The lowest fish regimen led to a <span class="hlt">mercurial</span> contamination pressure of 1 ng <span class="hlt">mercury</span> per day per g of body weight, which is precisely that affecting the Wayana Amerindians. Results The expression of several genes was modified with <span class="hlt">mercury</span> intoxication in liver, kidneys, and hippocampus, even at the lowest tested fish regimen. A net genetic response could be observed for <span class="hlt">mercury</span> concentrations accumulated within tissues as weak as 0.15 ppm in the liver, 1.4 ppm in the kidneys, and 0.4 ppm in the hippocampus. This last value is in the range of the <span class="hlt">mercury</span> concentrations found in the brains of chronically exposed patients in the Minamata region or in brains from heavy fish consumers. Mitochondrial respiratory rates showed a 35–40% decrease in respiration for the three contaminated mice groups. In the muscles of mice fed the lightest fish-containing diet, cytochrome c oxidase activity was decreased to <span class="hlt">45</span>% of that of the <span class="hlt">control</span> muscles. When mice behavior was assessed in a cross maze, those fed the lowest and mid-level fish-containing diets developed higher anxiety state behaviors compared to mice fed with <span class="hlt">control</span> diet. Conclusion We conclude that a vegetarian diet containing as little as 0.1% of <span class="hlt">mercury</span>-contaminated fish is able to trigger in mice, after only one month of exposure, disorders presenting all the hallmarks of <span class="hlt">mercurial</span> contamination. PMID:18959803</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=334370','PESTICIDES'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=334370"><span><span class="hlt">Mercury</span> Emissions Capture Efficiency with Activated Carbon ...</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>This EPA-led project, conducted in collaboration with UNEP, the Swedish Environmental Institute and various Russian Institutes, that demonstrates that the <span class="hlt">mercury</span> emission <span class="hlt">control</span> efficiencies of activated carbon injection technologies applied at a Russian power plant burning Russian coals are similar to those found at U.S. plants burning US coals. (The US funding was from funds provided to the EPA by the Department of State pursuant to the Bio-Chemical Redirect Program which engages former Russian (and other former Soviet) weapons scientists in research projects with US collaborators.) Among other things, this report will aid the major <span class="hlt">task</span>, of developing guidance on best available <span class="hlt">mercury</span> <span class="hlt">control</span> technology/best environmental practices (BAT/BEP) for coal-fired power plants, a major source a global anthropogenic emissions. (The new Minamata Convention requires BAT/BEP for new power plants and other major emission sources within five years of treaty ratification.)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_3 --> <div id="page_4" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="61"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/750449','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/750449"><span>Process for combined <span class="hlt">control</span> of <span class="hlt">mercury</span> and nitric oxide.</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Livengood, C. D.; Mendelsohn, M. H.</p> <p></p> <p>Continuing concern about the effects of <span class="hlt">mercury</span> in the environment may lead to requirements for the <span class="hlt">control</span> of <span class="hlt">mercury</span> emissions from coal-fired power plants. If such <span class="hlt">controls</span> are mandated, the use of existing flue-gas cleanup systems, such as wet scrubbers currently employed for flue-gas desulfurization, would be desirable, Such scrubbers have been shown to be effective for capturing oxidized forms of <span class="hlt">mercury</span>, but cannot capture the very insoluble elemental <span class="hlt">mercury</span> (Hg{sup 0}) that can form a significant fraction of the total emissions. At Argonne National Laboratory, we have proposed and tested a concept for enhancing removal of Hg{sup 0}, as well as nitric oxide, through introduction of an oxidizing agent into the flue gas upstream of a scrubber, which readily absorbs the soluble reaction products. Recently, we developed a new method for introducing the oxidizing agent into the flue-gas stream that dramatically improved reactant utilization. The oxidizing agent employed was NOXSORB{trademark}, which is a commercial product containing chloric acid and sodium chlorate. When a dilute solution of this agent was introduced into a gas stream containing Hg{sup 0} and other typical flue-gas species at 300 F, we found that about 100% of the <span class="hlt">mercury</span> was removed from the gas phase and recovered in process liquids. At the same time, approximately 80% of the nitric oxide was removed. The effect of sulfur dioxide on this process was also investigated and the results showed that it slightly decreased the amount of Hg{sup 0} oxidized while appearing to increase the removal of nitric oxide from the gas phase. We are currently testing the effects of variations in NOXSORB{trademark} concentration, sulfur dioxide concentration, nitric oxide concentration, and reaction time (residence time). Preliminary economic projections based on the results to date indicate that the chemical cost for nitric oxide oxidation could be less thanmore » $$5,000/ton removed, while for Hg{sup 0</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=238825','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=238825"><span>Methods for Measuring Specific Rates of <span class="hlt">Mercury</span> Methylation and Degradation and Their Use in Determining Factors <span class="hlt">Controlling</span> Net Rates of <span class="hlt">Mercury</span> Methylation</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ramlal, Patricia S.; Rudd, John W. M.; Hecky, Robert E.</p> <p>1986-01-01</p> <p>A method was developed to estimate specific rates of demethylation of methyl <span class="hlt">mercury</span> in aquatic samples by measuring the volatile 14C end products of 14CH3HgI demethylation. This method was used in conjunction with a 203Hg2+ radiochemical method which determines specific rates of <span class="hlt">mercury</span> methylation. Together, these methods enabled us to examine some factors <span class="hlt">controlling</span> the net rate of <span class="hlt">mercury</span> methylation. The methodologies were field tested, using lake sediment samples from a recently flooded reservoir in the Southern Indian Lake system which had developed a <span class="hlt">mercury</span> contamination problem in fish. Ratios of the specific rates of methylation/demethylation were calculated. The highest ratios of methylation/demethylation were calculated. The highest ratios of methylation/demethylation occurred in the flooded shorelines of Southern Indian Lake. These results provide an explanation for the observed increases in the methyl <span class="hlt">mercury</span> concentrations in fish after flooding. PMID:16346959</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/14768245','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/14768245"><span>Chronic psychological effects of exposure to <span class="hlt">mercury</span> vapour among chlorine-alkali plant workers.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pranjić, N; Sinanović, O; Jakubović, R</p> <p>2003-01-01</p> <p>Quantitative assessment of nervous system function is essential in characterising the nature and extent of impairment in individuals experiencing symptoms following work-place <span class="hlt">mercury</span> vapour exposure. The purpose of this study was the application of standardised tests of behavioural, psychomotor and memory function to understand the neuropsychological effects of <span class="hlt">mercury</span> in occupationally exposed chlorine-alkali plant workers. The study comprised <span class="hlt">45</span> workers at a chlorine-alkali plant with the mean age of 39.36 +/- 5.94 years, who had been exposed to daily inhalation of <span class="hlt">mercury</span> vapour over long-term employment of 16.06 +/- 4.29 years. The cumulative <span class="hlt">mercury</span> index was 155.32 +/- 95.02 micrograms/g creatinine, the mean of urinary <span class="hlt">mercury</span> concentrations on the first day of the study was 119.50 +/- 157.24 micrograms/g creatinine, and the mean of urinary <span class="hlt">mercury</span> concentrations 120 days after cessation of exposure was 21.70 +/- 26.07 micrograms/g creatinine. The analysis included tests of behavioural, psychomotor and memory function. The behavioural test battery consisted of: Environmental Worry Scale (EWS), Minnesota Modified Personal Inventory (MMPI-2), Purdue standard 25 minute test, and adapted, 10 minutes test, Bender's Visual-Motor Gestalt test (BGT), and Eysenck Personality Inventory (EPQ). The data were compared to a <span class="hlt">control</span> group of 32 not directly exposed workers. In the <span class="hlt">mercury</span> vapour exposed workers with relatively high level exposure to inorganic <span class="hlt">mercury</span> vapour (TWA/TLV = 0.12 mg/m3/0.025 mg/m3) we identified somatic depression-hypochondria symptoms with higher scores for scales: hysteria (P < 0.001), schizoid and psycho-asthenia (MMPI-2). The <span class="hlt">mercury</span>-exposed workers had introvert behaviour (EPQ, MMPI-2). The cognitive disturbances in <span class="hlt">mercury</span>-exposed workers were identified as: concentration difficulty, psychomotor, perceptual and motor coordination disturbances, and brain effects. We identified fine tremor of the hands in 34 out of <span class="hlt">45</span> <span class="hlt">mercury</span>-exposed workers</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/970601','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/970601"><span>Toxecon Retrofit for <span class="hlt">Mercury</span> and Mulit-Pollutant <span class="hlt">Control</span> on Three 90-MW Coal-Fired Boilers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Steven Derenne; Robin Stewart</p> <p>2009-09-30</p> <p>This U.S. Department of Energy (DOE) Clean Coal Power Initiative (CCPI) project was based on a cooperative agreement between We Energies and the DOE Office of Fossil Energy's National Energy Technology Laboratory (NETL) to design, install, evaluate, and demonstrate the EPRI-patented TOXECON{trademark} air pollution <span class="hlt">control</span> process. Project partners included Cummins & Barnard, ADA-ES, and the Electric Power Research Institute (EPRI). The primary goal of this project was to reduce <span class="hlt">mercury</span> emissions from three 90-MW units that burn Powder River Basin coal at the We Energies Presque Isle Power Plant in Marquette, Michigan. Additional goals were to reduce nitrogen oxide (NO{submore » x}), sulfur dioxide (SO{sub 2}), and particulate matter emissions; allow reuse and sale of fly ash; advance commercialization of the technology; demonstrate a reliable <span class="hlt">mercury</span> continuous emission monitor (CEM) suitable for use at power plants; and demonstrate recovery of <span class="hlt">mercury</span> from the sorbent. <span class="hlt">Mercury</span> was <span class="hlt">controlled</span> by injection of activated carbon upstream of the TOXECON{trademark} baghouse, which achieved more than 90% removal on average over a 44-month period. During a two-week test involving trona injection, SO{sub 2} emissions were reduced by 70%, although no coincident removal of NOx was achieved. The TOXECON{trademark} baghouse also provided enhanced particulate <span class="hlt">control</span>, particularly during startup of the boilers. On this project, <span class="hlt">mercury</span> CEMs were developed and tested in collaboration with Thermo Fisher Scientific, resulting in a reliable CEM that could be used in the power plant environment and that could measure <span class="hlt">mercury</span> as low as 0.1 {micro}g/m{sup 3}. Sorbents were injected downstream of the primary particulate collection device, allowing for continued sale and beneficial use of captured fly ash. Two methods for recovering <span class="hlt">mercury</span> using thermal desorption on the TOXECON{trademark} PAC/ash mixture were successfully tested during this program. Two methods for using the TOXECON</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18365889','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18365889"><span>Phenyl mercuric acetate (PMA): <span class="hlt">mercury</span>-bearing flexible gymnasium floors in schools--evaluation of hazards and <span class="hlt">controlled</span> abatement.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Beaulieu, Harry J; Beaulieu, Serrita; Brown, Chris</p> <p>2008-06-01</p> <p>Phenyl mercuric acetate (PMA) historically has been used as a catalyst in polyurethane systems. In the 1950s-1970s, PMA was used as a catalyst in the 3M Tartan brand polyurethane flexible floors that were installed commonly in school gymnasiums. <span class="hlt">Mercury</span> vapor is released into air above the surface of these floors. Sampling <span class="hlt">mercury</span> in bulk flooring material and <span class="hlt">mercury</span> vapor in air was conducted in nine Idaho schools in the spring of 2006. These evaluations were conducted in response to concerns by school officials that the floors could contain <span class="hlt">mercury</span> and could release the <span class="hlt">mercury</span> vapor into the air, presenting a potential health hazard for students, staff, and visitors. <span class="hlt">Controlled</span> abatement was conducted in one school where remodeling would impact the <span class="hlt">mercury</span>-bearing flexible gym floors ( approximately 9,000 ft(2) total). The <span class="hlt">controlled</span> abatement consisted of containment of the work area with negative air technology; worker protection, including <span class="hlt">mercury</span>-specific training, use of personal protective equipment, and biological and exposure monitoring; and environmental protection, including proper disposal of <span class="hlt">mercury</span>-bearing hazardous waste material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AGUFM.A23A0170Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AGUFM.A23A0170Y"><span>Investigation of Processes <span class="hlt">Controlling</span> <span class="hlt">Mercury</span> Cycling at Midlatitudinal Marine and Inland Sites: Improvements and Applications of A <span class="hlt">Mercury</span> Box Model</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>ye, Z.</p> <p>2013-12-01</p> <p><span class="hlt">Mercury</span> (Hg) is a hazardous pollutant due to the bioaccumulation in food chain. It is emitted to the atmosphere primarily as elemental form, and the long lifetime of which allows global transport. Oxidation of gaseous elemental <span class="hlt">mercury</span> (GEM) generates reactive gaseous <span class="hlt">mercury</span> (RGM) which plays an important role in the atmospheric <span class="hlt">mercury</span> cycle by enhancing the rate of <span class="hlt">mercury</span> deposition to ecosystem. The present study aimed to investigate the midlatitudinal atmospheric Hg cycling. To achieve that, a <span class="hlt">mercury</span> chemistry box model was improved by employing the most up-to-date kinetic data for gaseous and aqueous reactions, and was applied to summertime clear sky conditions at three specific sites: Appledore Island (marine site), Thompson Farm (coastal site), and Pack Monadnock (inland site). The model was evaluated using observational data of RGM and pHg (particulate <span class="hlt">mercury</span>) concentrations from these sites. The simulation results for all three sites showed that HgO, which is produced from oxidation of GEM by O3 and OH, contributed the most (>82%) to the total RGM production. Even in the marine boundary layer, halogen species (mainly Br) only contributed less than 12% to total RGM. The importance of reactions in most updated halogen chemistry has been evaluated. Gas and particle partitioning played an important role in coastal and inland environments. Some abnormally high RGM peaks were found at Appledore Island which may be explained by transport and air-sea exchange. Specific reactions and other processes <span class="hlt">controlling</span> the diurnal cycles of RGM and pHg at the three sites are still being investigated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63696&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63696&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>PRELIMINARY PERFORMANCE AND COST ESTIMATES OF <span class="hlt">MERCURY</span> EMISSION <span class="hlt">CONTROL</span> OPTIONS FOR ELECTRIC UTILITY BOILERS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p><br>The paper discusses preliminary performance and cost estimates of <span class="hlt">mercury</span> emission <span class="hlt">control</span> options for electric utility boilers. Under the Clean Air Act Amendments of 1990, EPA had to determine whether <span class="hlt">mercury</span> emissions from coal-fired power plants should be regulated. To a...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26121324','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26121324"><span>The secondary release of <span class="hlt">mercury</span> in coal fly ash-based flue-gas <span class="hlt">mercury</span> removal technology.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>He, Jingfeng; Duan, Chenlong; Lei, Mingzhe; Zhu, Xuemei</p> <p>2016-01-01</p> <p>The secondary release of <span class="hlt">mercury</span> from coal fly ash is a negative by-product from coal-fired power plants, and requires effective <span class="hlt">control</span> to reduce environmental pollution. Analysing particle size distribution and composition of the coal fly ash produced by different <span class="hlt">mercury</span> removing technologies indicates that the particles are generally less than 0.5 mm in size and are composed mainly of SiO2, Al2O3, and Fe2O3. The relationships between <span class="hlt">mercury</span> concentration in the coal fly ash, its particle size, and loss of ignition were studied using different <span class="hlt">mercury</span> removing approaches. The research indicates that the coal fly ash's <span class="hlt">mercury</span> levels are significantly higher after injecting activated carbon or brominating activated carbon when compared to regular cooperating-pollution <span class="hlt">control</span> technology. This is particularly true for particle size ranges of >0.125, 0.075-0.125, and 0.05-0.075 mm. Leaching experiments revealed the secondary release of <span class="hlt">mercury</span> in discarded coal fly ash. The concentration of <span class="hlt">mercury</span> in the coal fly ash increases as the quantity of injecting activated carbon or brominating activated carbon increases. The leached concentrations of <span class="hlt">mercury</span> increase as the particle size of the coal fly ash increases. Therefore, the secondary release of <span class="hlt">mercury</span> can be <span class="hlt">controlled</span> by adding suitable activated carbon or brominating activated carbon when disposing of coal fly ash. Adding CaBr2 before coal combustion in the boiler also helps <span class="hlt">control</span> the secondary release of <span class="hlt">mercury</span>, by increasing the Hg(2+) concentration in the leachate. This work provides a theoretical foundation for <span class="hlt">controlling</span> and removing <span class="hlt">mercury</span> in coal fly ash disposal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26606506','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26606506"><span>Effectiveness of Emission <span class="hlt">Controls</span> to Reduce the Atmospheric Concentrations of <span class="hlt">Mercury</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Castro, Mark S; Sherwell, John</p> <p>2015-12-15</p> <p>Coal-fired power plants in the United States are required to reduce their emissions of <span class="hlt">mercury</span> (Hg) into the atmosphere to lower the exposure of Hg to humans. The effectiveness of power-plant emission <span class="hlt">controls</span> on the atmospheric concentrations of Hg in the United States is largely unknown because there are few long-term high-quality atmospheric Hg data sets. Here, we present the atmospheric concentrations of Hg and sulfur dioxide (SO2) measured from 2006 to 2015 at a relatively pristine location in western Maryland that is several (>50 km) kilometers downwind of power plants in Ohio, Pennsylvania, and West Virginia. Annual average atmospheric concentrations of gaseous oxidized <span class="hlt">mercury</span> (GOM), SO2, fine particulate <span class="hlt">mercury</span> (PBM2.5), and gaseous elemental <span class="hlt">mercury</span> (GEM) declined by 75%, 75%, 43%, and 13%, respectively, and were strongly correlated with power-plant Hg emissions from the upwind states. These results provide compelling evidence that reductions in Hg emissions from power plants in the United States had their intended impact to reduce regional Hg pollution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022370','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022370"><span><span class="hlt">Mercury</span> mine drainage and processes that <span class="hlt">control</span> its environmental impact</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Rytuba, J.J.</p> <p>2000-01-01</p> <p>Mine drainage from <span class="hlt">mercury</span> mines in the California Coast Range <span class="hlt">mercury</span> mineral belt is an environmental concern because of its acidity and high sulfate, <span class="hlt">mercury</span>, and methylmercury concentrations. Two types of <span class="hlt">mercury</span> deposits are present in the mineral belt, silica-carbonate and hot-spring type. Mine drainage is associated with both deposit types but more commonly with the silica-carbonate type because of the extensive underground workings present at these mines. <span class="hlt">Mercury</span> ores consisting primarily of cinnabar were processed in rotary furnaces and retorts and elemental <span class="hlt">mercury</span> recovered from condensing systems. During the roasting process <span class="hlt">mercury</span> phases more soluble than cinnabar are formed and concentrated in the mine tailings, commonly termed calcines. Differences in mineralogy and trace metal geochemistry between the two deposit types are reflected in mine drainage composition. Silica-carbonate type deposits have higher iron sulfide content than hot- spring type deposits and mine drainage from these deposits may have extreme acidity and very high concentrations of iron and sulfate. <span class="hlt">Mercury</span> and methylmercury concentrations in mine drainage are relatively low at the point of discharge from mine workings. The concentration of both <span class="hlt">mercury</span> species increases significantly in mine drainage that flows through and reacts with calcines. The soluble <span class="hlt">mercury</span> phases in the calcines are dissolved and sulfate is added such that methylation of <span class="hlt">mercury</span> by sulfate reducing bacteria is enhanced in calcines that are saturated with mine drainage. Where <span class="hlt">mercury</span> mine drainage enters and first mixes with stream water, the addition of high concentrations of <span class="hlt">mercury</span> and sulfate generates a favorable environment for methylation of <span class="hlt">mercury</span>. Mixing of oxygenated stream water with mine drainage causes oxidation of dissolved iron(II) and precipitation of iron oxyhydroxide that accumulates in the streambed. Both <span class="hlt">mercury</span> and methylmercury are strongly adsorbed onto iron oxyhydroxide over the p</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title32-vol6/pdf/CFR-2013-title32-vol6-sec2001-45.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title32-vol6/pdf/CFR-2013-title32-vol6-sec2001-45.pdf"><span>32 CFR 2001.<span class="hlt">45</span> - Information <span class="hlt">controls</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-07-01</p> <p>... 32 National Defense 6 2013-07-01 2013-07-01 false Information <span class="hlt">controls</span>. 2001.<span class="hlt">45</span> Section 2001.<span class="hlt">45....45</span> Information <span class="hlt">controls</span>. (a) General. Agency heads shall establish a system of <span class="hlt">control</span> measures which assure that access to classified information is provided to authorized persons. The <span class="hlt">control</span> measures...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title32-vol6/pdf/CFR-2011-title32-vol6-sec2001-45.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title32-vol6/pdf/CFR-2011-title32-vol6-sec2001-45.pdf"><span>32 CFR 2001.<span class="hlt">45</span> - Information <span class="hlt">controls</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 32 National Defense 6 2011-07-01 2011-07-01 false Information <span class="hlt">controls</span>. 2001.<span class="hlt">45</span> Section 2001.<span class="hlt">45....45</span> Information <span class="hlt">controls</span>. (a) General. Agency heads shall establish a system of <span class="hlt">control</span> measures which assure that access to classified information is provided to authorized persons. The <span class="hlt">control</span> measures...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title32-vol6/pdf/CFR-2010-title32-vol6-sec2001-45.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title32-vol6/pdf/CFR-2010-title32-vol6-sec2001-45.pdf"><span>32 CFR 2001.<span class="hlt">45</span> - Information <span class="hlt">controls</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 32 National Defense 6 2010-07-01 2010-07-01 false Information <span class="hlt">controls</span>. 2001.<span class="hlt">45</span> Section 2001.<span class="hlt">45....45</span> Information <span class="hlt">controls</span>. (a) General. Agency heads shall establish a system of <span class="hlt">control</span> measures which assure that access to classified information is provided to authorized persons. The <span class="hlt">control</span> measures...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70157507','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70157507"><span><span class="hlt">Mercury</span> cycling in terrestrial watersheds</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Shanley, James B.; Bishop, Kevin; Banks, Michael S.</p> <p>2012-01-01</p> <p>This chapter discusses <span class="hlt">mercury</span> cycling in the terrestrial landscape, including inputs from the atmosphere, accumulation in soils and vegetation, outputs in streamflow and volatilization, and effects of land disturbance. <span class="hlt">Mercury</span> mobility in the terrestrial landscape is strongly <span class="hlt">controlled</span> by organic matter. About 90% of the atmospheric <span class="hlt">mercury</span> input is retained in vegetation and organic matter in soils, causing a buildup of legacy <span class="hlt">mercury</span>. Some <span class="hlt">mercury</span> is volatilized back to the atmosphere, but most export of <span class="hlt">mercury</span> from watersheds occurs by streamflow. Stream <span class="hlt">mercury</span> export is episodic, in association with dissolved and particulate organic carbon, as stormflow and snowmelt flush organic-rich shallow soil horizons. The terrestrial landscape is thus a major source of <span class="hlt">mercury</span> to downstream aquatic environments, where <span class="hlt">mercury</span> is methylated and enters the aquatic food web. With ample organic matter and sulfur, methylmercury forms in uplands as well—in wetlands, riparian zones, and other anoxic sites. Watershed features (topography, land cover type, and soil drainage class) are often more important than atmospheric <span class="hlt">mercury</span> deposition in <span class="hlt">controlling</span> the amount of stream <span class="hlt">mercury</span> and methylmercury export. While reductions in atmospheric <span class="hlt">mercury</span> deposition may rapidly benefit lakes, the terrestrial landscape will respond only over decades, because of the large stock and slow turnover of legacy <span class="hlt">mercury</span>. We conclude with a discussion of future scenarios and the challenge of managing terrestrial <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23668111','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23668111"><span>[Characteristics of <span class="hlt">mercury</span> exchange flux between soil and atmosphere under the snow retention and snow melting <span class="hlt">control</span>].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Gang; Wang, Ning; Ai, Jian-Chao; Zhang, Lei; Yang, Jing; Liu, Zi-Qi</p> <p>2013-02-01</p> <p>Jiapigou gold mine, located in the upper Songhua River, was once the largest mine in China due to gold output, where gold extraction with algamation was widely applied to extract gold resulting in severe <span class="hlt">mercury</span> pollution to ambient environmental medium. In order to study the characteristics of <span class="hlt">mercury</span> exchange flux between soil (snow) and atmosphere under the snow retention and snow melting <span class="hlt">control</span>, sampling sites were selected in equal distances along the slope which is situated in the typical hill-valley terrain unit. <span class="hlt">Mercury</span> exchange flux between soil (snow) and atmosphere was determined with the method of dynamic flux chamber and in all sampling sites the atmosphere concentration from 0 to 150 cm near to the earth in the vertical direction was measured. Furthermore, the impact factors including synchronous meteorology, the surface characteristics under the snow retention and snow melting <span class="hlt">control</span> and the <span class="hlt">mercury</span> concentration in vertical direction were also investigated. The results are as follows: During the period of snow retention and melting the air <span class="hlt">mercury</span> tends to gather towards valley bottom along the slope and an obvious deposit tendency process was found from air to the earth's surface under the <span class="hlt">control</span> of thermal inversion due to the underlying surface of cold source (snow surface). However, during the period of snow melting, <span class="hlt">mercury</span> exchange flux between the soil and atmosphere on the surface of the earth with the snow being melted demonstrates alternative deposit and release processes. As for the earth with snow covered, the deposit level of <span class="hlt">mercury</span> exchange flux between soil and atmosphere is lower than that during the period of snow retention. The relationship between <span class="hlt">mercury</span> exchange flux and impact factors shows that in snow retention there is a remarkable negative linear correlation between <span class="hlt">mercury</span> exchange flux and air <span class="hlt">mercury</span> concentration as well as between the former and the air temperature. In addition, in snow melting <span class="hlt">mercury</span> exchange</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11355295','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11355295"><span>Occupational exposure to airborne <span class="hlt">mercury</span> during gold mining operations near El Callao, Venezuela.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Drake, P L; Rojas, M; Reh, C M; Mueller, C A; Jenkins, F M</p> <p>2001-04-01</p> <p>'s proximal tubule cells. The mean urine NAG concentration was 3.6 International Units/g-Cr (IU/g-Cr) with a range of 0.5 to 11.5 IU/g-Cr. Three workers had urine NAG levels in excess of the reference values. Correlation analyses found statistically significant correlations between airborne <span class="hlt">mercury</span> exposure and urine <span class="hlt">mercury</span> level (P = 0.01), and between urine <span class="hlt">mercury</span> level and urine NAG excretion (P = 0.01). In addition, the airborne <span class="hlt">mercury</span> exposure data and urine <span class="hlt">mercury</span> data were segregated by job <span class="hlt">tasks</span>. A Wilcoxon rank sum test revealed significant correlations between <span class="hlt">tasks</span> and <span class="hlt">mercury</span> exposure (P = 0.03), and between <span class="hlt">tasks</span> and urine <span class="hlt">mercury</span> level (P = 0.02). The <span class="hlt">tasks</span> with the highest mean airborne <span class="hlt">mercury</span> exposures were "burning the <span class="hlt">mercury</span>-gold amalgam" and "gold refining/smelting". Recommendations were provided for improving the retort design to better contain <span class="hlt">mercury</span>, for ventilation in the gold shops, and for medical surveillance and educational programs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23163739','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23163739"><span>Lower urinary tract symptoms in patients with Niigata Minamata disease: a case-<span class="hlt">control</span> study 50 years after methyl <span class="hlt">mercury</span> pollution.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hara, Noboru; Saito, Hisashi; Takahashi, Kota; Takeda, Masayuki</p> <p>2013-06-01</p> <p>To clarify the prevalence of lower urinary tract symptoms and overactive bladder in patients with chronic methyl <span class="hlt">mercury</span> poisoning. A total of 151 patients (61 men and 90 women; mean age 72.1 years) with Niigata Minamata disease were enrolled. An age- and sex-matched group of 150 participants was used as <span class="hlt">control</span>. Patients reported their International Prostate Symptom Score and overactive bladder symptom score. In men, the total, storage and voiding International Prostate Symptom Score scores were higher in the Niigata Minamata disease group than in the <span class="hlt">control</span> group (10.6 ± 7.8 vs 5.0 ± 5.0, <span class="hlt">4.5</span> ± 3.3 vs 2.4 ± 2.4 and 6.1 ± 5.1 vs 2.7 ± 3.1, respectively, P < 0.001 in all). In women, these scores were also higher in the Niigata Minamata disease group than in the <span class="hlt">control</span> group (8.9 ± 7.3 vs 4.0 ± 4.0, 4.4 ± 3.2 vs 2.8 ± 2.4 and <span class="hlt">4.5</span> ± 5.0 vs 1.3 ± 2.0, respectively, P < 0.001 in all). The prevalence of overactive bladder was more frequent in the Niigata Minamata disease group compared with that in the <span class="hlt">control</span> group (51.7% vs 26.7%, P < 0.001). In both men and women, the overactive bladder symptom score was higher in the Niigata Minamata disease group than in the <span class="hlt">control</span> group (4.1 ± 3.0 vs 2.4 ± 2.9, P = 0.002 and 4.6 ± 3.6 vs 2.7 ± 2.9, P < 0.001, respectively). The International Prostate Symptom Score and overactive bladder symptom score in the Niigata Minamata disease group were highest in patients aged 60-69 years (P < 0.001 in both), whereas these increased in an age-dependent manner in the <span class="hlt">control</span> group. Lower urinary tract symptoms and overactive bladder are severe and highly prevalent conditions among patients with methyl <span class="hlt">mercury</span> poisoning. The higher prevalence of lower urinary tract symptoms among patients aged 60-69 years might be related to the fact that they were exposed to methyl <span class="hlt">mercury</span> during their childhood/development. © 2012 The Japanese</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26041155','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26041155"><span>Impacts of <span class="hlt">Mercury</span> Pollution <span class="hlt">Controls</span> on Atmospheric <span class="hlt">Mercury</span> Concentration and Occupational <span class="hlt">Mercury</span> Exposure in a Hospital.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Ping; Yang, Yan; Xiong, Wuyan</p> <p>2015-12-01</p> <p><span class="hlt">Mercury</span> (Hg) and Hg-containing products are used in a wide range of settings in hospitals. Hg pollution <span class="hlt">control</span> measures were carried out in the pediatric ward of a hospital to decrease the possibility of Hg pollution occurring and to decrease occupational Hg exposure. Total gaseous Hg (TGM) concentrations in the pediatric ward and hair and urine Hg concentrations for the pediatric staff were determined before and after the Hg pollution <span class="hlt">control</span> measures had been implemented. A questionnaire survey performed indicated that the pediatric staff had little understanding of Hg pollution and that appropriate disposal techniques were not always used after Hg leakage. TGM concentrations in the pediatric ward and urine Hg (UHg) concentrations for the pediatric staff were 25.7 and 22.2% lower, respectively, after the Hg pollution <span class="hlt">control</span> measures had been implemented than before, which indicated that the <span class="hlt">control</span> measures were effective. However, TGM concentrations in the pediatric ward remained significantly higher than background concentrations and UHg concentrations for the pediatric staff were remained significantly higher than the concentrations in <span class="hlt">control</span> group, indicating continued existence of certain Hg pollution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23211228','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23211228"><span>Does a multicomponent exercise program improve dual-<span class="hlt">task</span> performance in amnestic mild cognitive impairment? A randomized <span class="hlt">controlled</span> trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Makizako, Hyuma; Doi, Takehiko; Shimada, Hiroyuki; Yoshida, Daisuke; Tsutsumimoto, Kota; Uemura, Kazuki; Suzuki, Takao</p> <p>2012-12-01</p> <p>There has been much interest in exercise interventions as a primary behavioral prevention strategy against cognitive decline. The aim of this study was to evaluate the effect of a multicomponent exercise program on physical and dual-<span class="hlt">task</span> performances in community-dwelling older adults with amnestic mild cognitive impairment (aMCI). Fifty older adults (23 women) with aMCI (mean age, 76 years) were randomized to an intervention (n=25) or a <span class="hlt">control</span> group (n=25). The intervention group received a multicomponent exercise program for 90 minutes/day, 2 days/week, or 40 times over six months. The multicomponent exercises included aerobic exercise, muscle strength training and postural balance retraining, which was conducted under multi-<span class="hlt">task</span> conditions to stimulate attention and memory. Participants in the <span class="hlt">control</span> group attended two health promotion education classes within six months. Physical and dual-<span class="hlt">task</span> performances were measured before randomization and after six months. Dual-<span class="hlt">task</span> performances using reaction times with balance and cognitive demands were measured. The improvement effects on dual-<span class="hlt">task</span> performances with both balance and cognitive demands were not statistically significant: reaction time with balance demand F1,<span class="hlt">45</span>=3.3, p=0.07, and cognitive demand F1,<span class="hlt">45</span>=2.6, p=0.12. However, there was a significant group-by-time interaction on maximal walking speed, which decreased significantly in the <span class="hlt">control</span> group (F1,<span class="hlt">45</span>=5.9, p=0.02). This six-month multicomponent exercise program improved maximal walking speed in older adults with aMCI; however, it did not improve dual-<span class="hlt">task</span> performances assessed by reaction times.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940026056','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940026056"><span><span class="hlt">Task</span>-level <span class="hlt">control</span> for autonomous robots</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Simmons, Reid</p> <p>1994-01-01</p> <p><span class="hlt">Task</span>-level <span class="hlt">control</span> refers to the integration and coordination of planning, perception, and real-time <span class="hlt">control</span> to achieve given high-level goals. Autonomous mobile robots need <span class="hlt">task</span>-level <span class="hlt">control</span> to effectively achieve complex <span class="hlt">tasks</span> in uncertain, dynamic environments. This paper describes the <span class="hlt">Task</span> <span class="hlt">Control</span> Architecture (TCA), an implemented system that provides commonly needed constructs for <span class="hlt">task</span>-level <span class="hlt">control</span>. Facilities provided by TCA include distributed communication, <span class="hlt">task</span> decomposition and sequencing, resource management, monitoring and exception handling. TCA supports a design methodology in which robot systems are developed incrementally, starting first with deliberative plans that work in nominal situations, and then layering them with reactive behaviors that monitor plan execution and handle exceptions. To further support this approach, design and analysis tools are under development to provide ways of graphically viewing the system and validating its behavior.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_4 --> <div id="page_5" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="81"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title40-vol6/pdf/CFR-2010-title40-vol6-sec60-45Da.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title40-vol6/pdf/CFR-2010-title40-vol6-sec60-45Da.pdf"><span>40 CFR 60.<span class="hlt">45</span>Da - Standard for <span class="hlt">mercury</span> (Hg).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>...-fired electric utility steam generating unit that burns only lignite, you must not discharge into the... (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Electric Utility... for <span class="hlt">mercury</span> (Hg). (a) For each coal-fired electric utility steam generating unit other than an IGCC...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19780013259','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19780013259"><span>Evolution of the 1-mlb <span class="hlt">mercury</span> ion thruster subsystem</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kerslake, W. R.; Banks, B. A.</p> <p>1978-01-01</p> <p>The developmental history, performance, and major lifetests of each component of the present 1-mlb (<span class="hlt">4.5</span> mN) thruster system are traced over the past 10 years. The 1-mlb thruster subsystem consists of an 8 cm diameter ion thruster mounted on 2 axis gimbals, a <span class="hlt">mercury</span> propellant tank, a power electronics unit, a <span class="hlt">controller</span>/digital interface unit, and necessary electrical harnesses plus propellant tankage and feed lines.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/836620','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/836620"><span>FIELD TEST PROGRAM TO DEVELOP COMPREHENSIVE DESIGN, OPERATING, AND COST DATA FOR <span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span> SYSTEMS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Michael D. Durham</p> <p></p> <p>PG&E NEG Salem Harbor Station Unit 1 was successfully tested for applicability of activated carbon injection as a <span class="hlt">mercury</span> <span class="hlt">control</span> technology. Test results from this site have enabled a thorough evaluation of <span class="hlt">mercury</span> <span class="hlt">control</span> at Salem Harbor Unit 1, including performance, estimated cost, and operation data. This unit has very high native <span class="hlt">mercury</span> removal, thus it was important to understand the impacts of process variables on native <span class="hlt">mercury</span> capture. The team responsible for executing this program included plant and PG&E headquarters personnel, EPRI and several of its member companies, DOE, ADA, Norit Americas, Inc., Hamon Research-Cottrell, Apogee Scientific, TRC Environmentalmore » Corporation, Reaction Engineering, as well as other laboratories. The technical support of all of these entities came together to make this program achieve its goals. Overall the objectives of this field test program were to determine the <span class="hlt">mercury</span> <span class="hlt">control</span> and balance-of-plant impacts resulting from activated carbon injection into a full-scale ESP on Salem Harbor Unit 1, a low sulfur bituminous-coal-fired 86 MW unit. It was also important to understand the impacts of process variables on native <span class="hlt">mercury</span> removal (>85%). One half of the gas stream was used for these tests, or 43 MWe. Activated carbon, DARCO FGD supplied by NORIT Americas, was injected upstream of the cold side ESP, just downstream of the air preheater. This allowed for approximately 1.5 seconds residence time in the duct before entering the ESP. Conditions tested in this field evaluation included the impacts of the Selective Non-Catalytic Reduction (SNCR) system on <span class="hlt">mercury</span> capture, of unburned carbon in the fly ash, of adjusting ESP inlet flue gas temperatures, and of boiler load on <span class="hlt">mercury</span> <span class="hlt">control</span>. The field evaluation conducted at Salem Harbor looked at several sorbent injection concentrations at several flue gas temperatures. It was noted that at the mid temperature range of 322-327 F, the LOI (unburned carbon) lost some</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/873963','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/873963"><span>Apparatus for <span class="hlt">control</span> of <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Downs, William; Bailey, Ralph T.</p> <p>2001-01-01</p> <p>A method and apparatus for reducing <span class="hlt">mercury</span> in industrial gases such as the flue gas produced by the combustion of fossil fuels such as coal adds hydrogen sulfide to the flue gas in or just before a scrubber of the industrial process which contains the wet scrubber. The method and apparatus of the present invention is applicable to installations employing either wet or dry scrubber flue gas desulfurization systems. The present invention uses kraft green liquor as a source for hydrogen sulfide and/or the injection of mineral acids into the green liquor to release vaporous hydrogen sulfide in order to form <span class="hlt">mercury</span> sulfide solids.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.A51G0193R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.A51G0193R"><span>Quantification of Gaseous Elemental <span class="hlt">Mercury</span> Dry Deposition to Environmental Surfaces using <span class="hlt">Mercury</span> Stable Isotopes in a <span class="hlt">Controlled</span> Environment</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rutter, A. P.; Schauer, J. J.; Shafer, M. M.; Olson, M.; Robinson, M.; Vanderveer, P.; Creswell, J. E.; Parman, A.; Mallek, J.; Gorski, P.</p> <p>2009-12-01</p> <p>Andrew P. Rutter (1) * *, James J, Schauer (1,2) *, Martin M. Shafer(1,2), Michael R. Olson (1), Michael Robinson (1), Peter Vanderveer (3), Joel Creswell (1), Justin L. Mallek (1), Andrew M. Parman (1) (1) Environmental Chemistry and Technology Program, 660 N. Park St, Madison, WI 53705. (2) Wisconsin State Laboratory of Hygiene, 2601 Agriculture Drive, Madison, WI 53718. (3) Biotron, University of Wisconsin - Madison, 2115 Observatory Drive, Madison, WI 53706 * Correspond author(jjschauer@wisc.edu) * *Presenting author (aprutter@wisc.edu) Abstract Gaseous elemental <span class="hlt">mercury</span> (GEM) is the predominant component of atmospheric <span class="hlt">mercury</span> outside of arctic depletion events, and locations where anthropogenic point sources are not influencing atmospheric concentrations. GEM constitutes greater than 99% of the <span class="hlt">mercury</span> mass in most rural and remote locations. While dry and wet deposition of atmospheric <span class="hlt">mercury</span> is thought to be dominated by oxidized <span class="hlt">mercury</span> (a.k.a. reactive <span class="hlt">mercury</span>), only small GEM uptake to environmental surfaces could impact the input of <span class="hlt">mercury</span> to terrestrial and aquatic ecosystems. Dry deposition and subsequent re-emission of gaseous elemental <span class="hlt">mercury</span> is a pathway from the atmosphere that remains only partially understood from a mechanistic perspective. In order to properly model GEM dry deposition and re-emission an understanding of its dependence on irradiance, temperature, and relative humidity must be measured and parameterized for a broad spectrum of environmental surfaces colocated with surrogate deposition surfaces used to make field based dry deposition measurements. Measurements of isotopically enriched GEM dry deposition were made with a variety of environmental surfaces in a <span class="hlt">controlled</span> environment room at the University of Wisconsin Biotron. The experimental set up allowed dry deposition components which are not easily separated in the field to be decoupled. We were able to isolate surface transfer processes from variabilities caused by</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=206223&Lab=NRMRL&keyword=senior&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=206223&Lab=NRMRL&keyword=senior&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>The fate of <span class="hlt">mercury</span> collected from air pollution <span class="hlt">control</span> devices</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The <span class="hlt">mercury</span> that enters a coal-fired power plant, originates from the coal that is burned, and leaves through the output streams that include stack emissions and air pollution <span class="hlt">control</span> (APC) residues (either in solid or liquid form). This article describes recent fmdings on the fa...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=170944','PESTICIDES'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=170944"><span><span class="hlt">MERCURY</span> MEASUREMENTS USING DIRECT-ANALYZER ...</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>Under EPA's Water Quality Research Program, exposure studies are needed to determine how well <span class="hlt">control</span> strategies and guidance are working. Consequently, reliable and convenient techniques that minimize waste production are of special interest. While traditional methods for determining <span class="hlt">mercury</span> in solid samples involve the use of aggressive chemicals to dissolve the matrix and the use of other chemicals to properly reduce the <span class="hlt">mercury</span> to the volatile elemental form, pyrolysis-based analyzers can be used by directly weighing the solid in a sampling boat and initiating the instrumental analysis for total <span class="hlt">mercury</span>. The research focused on in the subtasks is the development and application of state-of the-art technologies to meet the needs of the public, Office of Water, and ORD in the area of Water Quality. Located In the subtasks are the various research projects being performed in support of this <span class="hlt">Task</span> and more in-depth coverage of each project. Briefly, each project's objective is stated below.Subtask 1: To integrate state-of-the-art technologies (polar organic chemical integrative samplers, advanced solid-phase extraction methodologies with liquid chromatography/electrospray/mass spectrometry) and apply them to studying the sources and fate of a select list of PPCPs. Application and improvement of analytical methodologies that can detect non-volatile, polar, water-soluble pharmaceuticals in source waters at levels that could be environmentally significant (at con</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19920012231','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19920012231"><span>An informal analysis of flight <span class="hlt">control</span> <span class="hlt">tasks</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Andersen, George J.</p> <p>1991-01-01</p> <p>Issues important in rotorcraft flight <span class="hlt">control</span> are discussed. A perceptual description is suggested of what is believed to be the major issues in flight <span class="hlt">control</span>. When the <span class="hlt">task</span> is considered of a pilot <span class="hlt">controlling</span> a helicopter in flight, the <span class="hlt">task</span> is decomposed in several subtasks. These subtasks include: (1) the <span class="hlt">control</span> of altitude, (2) the <span class="hlt">control</span> of speed, (3) the <span class="hlt">control</span> of heading, (4) the <span class="hlt">control</span> of orientation, (5) the <span class="hlt">control</span> of flight over obstacles, and (6) the <span class="hlt">control</span> of flight to specified positions in the world. The first four subtasks can be considered to be primary <span class="hlt">control</span> <span class="hlt">tasks</span> as they are not dependent on any other subtasks. However, the latter two subtasks can be considered hierarchical <span class="hlt">tasks</span> as they are dependent on other subtasks. For example, the <span class="hlt">task</span> of flight <span class="hlt">control</span> over obstacles can be decomposed as a <span class="hlt">task</span> requiring the <span class="hlt">control</span> of speed, altitude, and heading. Thus, incorrect <span class="hlt">control</span> of altitude should result in poor <span class="hlt">control</span> of flight over an obstacle.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AIPC..914..647Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AIPC..914..647Z"><span><span class="hlt">Mercury</span> Emission Measurement in Coal-Fired Boilers by Continuous <span class="hlt">Mercury</span> Monitor and Ontario Hydro Method</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhu, Yanqun; Zhou, Jinsong; He, Sheng; Cai, Xiaoshu; Hu, Changxin; Zheng, Jianming; Zhang, Le; Luo, Zhongyang; Cen, Kefa</p> <p>2007-06-01</p> <p>The <span class="hlt">mercury</span> emission <span class="hlt">control</span> approach attaches more importance. The accurate measurement of <span class="hlt">mercury</span> speciation is a first step. Because OH method (accepted method) can't provide the real-time data and 2-week time for results attained, it's high time to seek on line <span class="hlt">mercury</span> continuous emission monitors(Hg-CEM). Firstly, the gaseous elemental and oxidized <span class="hlt">mercury</span> were conducted to measure using OH and CEM method under normal operation conditions of PC boiler after ESP, the results between two methods show good consistency. Secondly, through ESP, gaseous oxidized <span class="hlt">mercury</span> decrease a little and particulate <span class="hlt">mercury</span> reduce a little bit, but the elemental <span class="hlt">mercury</span> is just the opposite. Besides, the WFGD system achieved to gaseous oxidized <span class="hlt">mercury</span> removal of 53.4%, gaseous overall <span class="hlt">mercury</span> and elemental <span class="hlt">mercury</span> are 37.1% and 22.1%, respectively.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6840111-accumulation-route-chemical-form-mercury-mushroom-species','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6840111-accumulation-route-chemical-form-mercury-mushroom-species"><span>Accumulation route and chemical form of <span class="hlt">mercury</span> in mushroom species</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Minagawa, K.; Sasaki, T.; Takizawa, Y.</p> <p>1980-09-01</p> <p>Some papers were published on several species of fungi having more accumulating abilities of <span class="hlt">mercury</span> than other land plants and a relatively small part of <span class="hlt">mercury</span> being present as methylmercury in most species (Stegnar et al. 1973, Stijve and Roschnik 1974). But, little information is available regarding the routes of <span class="hlt">mercury</span> in fungi, and also no report on <span class="hlt">mercury</span> speciation (chemical form and complexation) in them have been published, apart from methylmercury. In order to evaluate accurately their biological characteristics such as absorption, excretion, accumulation and toxicity (The <span class="hlt">Task</span> Group on Metal Interaction 1978), the <span class="hlt">mercury</span> speciation present in mushrooms,more » regardless of edible or nonedible, should be identified. In this report, we present (1) contents of total and methylmercury in mushrooms near the acetaldehyde factory which had the mounds of sludge containing <span class="hlt">mercury</span>, (2) data or exposure experiment of <span class="hlt">mercury</span> vapor to raw mushrooms (Shiitake) on the market, and (3) data on <span class="hlt">mercury</span> speciation of <span class="hlt">mercury</span> other than methylmercury.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70148402','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70148402"><span>Experimental dosing of wetlands with coagulants removes <span class="hlt">mercury</span> from surface water and decreases <span class="hlt">mercury</span> bioaccumulation in fish</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Ackerman, Joshua T.; Kraus, Tamara E.C.; Fleck, Jacob A.; Krabbenhoft, David P.; Horwarth, William R.; Bachand, Sandra M.; Herzog, Mark; Hartman, Christopher; Bachand, Philip A.M.</p> <p>2015-01-01</p> <p><span class="hlt">Mercury</span> pollution is widespread globally, and strategies for managing <span class="hlt">mercury</span> contamination in aquatic environments are necessary. We tested whether coagulation with metal-based salts could remove <span class="hlt">mercury</span> from wetland surface waters and decrease <span class="hlt">mercury</span> bioaccumulation in fish. In a complete randomized block design, we constructed nine experimental wetlands in California’s Sacramento–San Joaquin Delta, stocked them with mosquitofish (Gambusia affinis), and then continuously applied agricultural drainage water that was either untreated (<span class="hlt">control</span>), or treated with polyaluminum chloride or ferric sulfate coagulants. Total <span class="hlt">mercury</span> and methylmercury concentrations in surface waters were decreased by 62% and 63% in polyaluminum chloride treated wetlands and 50% and 76% in ferric sulfate treated wetlands compared to <span class="hlt">control</span> wetlands. Specifically, following coagulation, <span class="hlt">mercury</span> was transferred from the filtered fraction of water into the particulate fraction of water which then settled within the wetland. Mosquitofish <span class="hlt">mercury</span> concentrations were decreased by 35% in ferric sulfate treated wetlands compared to <span class="hlt">control</span> wetlands. There was no reduction in mosquitofish <span class="hlt">mercury</span> concentrations within the polyaluminum chloride treated wetlands, which may have been caused by production of bioavailable methylmercury within those wetlands. Coagulation may be an effective management strategy for reducing <span class="hlt">mercury</span> contamination within wetlands, but further studies should explore potential effects on wetland ecosystems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25893963','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25893963"><span>Experimental dosing of wetlands with coagulants removes <span class="hlt">mercury</span> from surface water and decreases <span class="hlt">mercury</span> bioaccumulation in fish.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ackerman, Joshua T; Kraus, Tamara E C; Fleck, Jacob A; Krabbenhoft, David P; Horwath, William R; Bachand, Sandra M; Herzog, Mark P; Hartman, C Alex; Bachand, Philip A M</p> <p>2015-05-19</p> <p><span class="hlt">Mercury</span> pollution is widespread globally, and strategies for managing <span class="hlt">mercury</span> contamination in aquatic environments are necessary. We tested whether coagulation with metal-based salts could remove <span class="hlt">mercury</span> from wetland surface waters and decrease <span class="hlt">mercury</span> bioaccumulation in fish. In a complete randomized block design, we constructed nine experimental wetlands in California's Sacramento-San Joaquin Delta, stocked them with mosquitofish (Gambusia affinis), and then continuously applied agricultural drainage water that was either untreated (<span class="hlt">control</span>), or treated with polyaluminum chloride or ferric sulfate coagulants. Total <span class="hlt">mercury</span> and methylmercury concentrations in surface waters were decreased by 62% and 63% in polyaluminum chloride treated wetlands and 50% and 76% in ferric sulfate treated wetlands compared to <span class="hlt">control</span> wetlands. Specifically, following coagulation, <span class="hlt">mercury</span> was transferred from the filtered fraction of water into the particulate fraction of water which then settled within the wetland. Mosquitofish <span class="hlt">mercury</span> concentrations were decreased by 35% in ferric sulfate treated wetlands compared to <span class="hlt">control</span> wetlands. There was no reduction in mosquitofish <span class="hlt">mercury</span> concentrations within the polyaluminum chloride treated wetlands, which may have been caused by production of bioavailable methylmercury within those wetlands. Coagulation may be an effective management strategy for reducing <span class="hlt">mercury</span> contamination within wetlands, but further studies should explore potential effects on wetland ecosystems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27429172','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27429172"><span>Chronic <span class="hlt">mercury</span> exposure impairs the sympathovagal <span class="hlt">control</span> of the rat heart.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Simões, M R; Azevedo, B F; Fiorim, J; Jr Freire, D D; Covre, E P; Vassallo, D V; Dos Santos, L</p> <p>2016-11-01</p> <p><span class="hlt">Mercury</span> is known to cause harmful neural effects affecting the cardiovascular system. Here, we evaluated the chronic effects of low-dose <span class="hlt">mercury</span> exposure on the autonomic <span class="hlt">control</span> of the cardiovascular system. Wistar rats were treated for 30 days with HgCl 2 (1st dose 4.6 μg/kg followed by 0.07 μg/kg per day, intramuscular) or saline. The femoral artery and vein were then cannulated for evaluation of autonomic <span class="hlt">control</span> of the hemodynamic function, which was evaluated in awake rats. The following tests were performed: baroreflex sensitivity, Von Bezold-Jarisch reflex, heart rate variability (HRV) and pharmacological blockade with methylatropine and atenolol to test the autonomic tone of the heart. Exposure to HgCl 2 for 30 days slightly increased the mean arterial pressure and heart rate (HR). There was a significant reduction in the baroreflex gain of animals exposed to HgCl 2 . Moreover, haemodynamic responses to the activation of the Von Bezold-Jarisch reflex were also reduced. The changes in the spectral analysis of HRV suggested a shift in the sympathovagal balance toward a sympathetic predominance after <span class="hlt">mercury</span> exposure, which was confirmed by autonomic pharmacological blockade in the HgCl 2 group. This group also exhibited reduced intrinsic HR after the double block suggesting that the pacemaker activity of the sinus node was also affected. These findings suggested that the autonomic modulation of the heart was significantly altered by chronic <span class="hlt">mercury</span> exposure, thus reinforcing that even at low concentrations such exposure might be associated with increased cardiovascular risk. © 2016 John Wiley & Sons Australia, Ltd.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5371824','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5371824"><span>Phosphatidylinositol (<span class="hlt">4,5</span>)-bisphosphate dynamically regulates the K2P background K+ channel <span class="hlt">TASK</span>-2</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Niemeyer, María Isabel; Cid, L. Pablo; Paulais, Marc; Teulon, Jacques; Sepúlveda, Francisco V.</p> <p>2017-01-01</p> <p>Two-pore domain K2P K+ channels responsible for the background K+ conductance and the resting membrane potential, are also finely regulated by a variety of chemical, physical and physiological stimuli. Hormones and transmitters acting through Gq protein-coupled receptors (GqPCRs) modulate the activity of various K2P channels but the signalling involved has remained elusive, in particular whether dynamic regulation by membrane PI(<span class="hlt">4,5</span>)P2, common among other classes of K+ channels, affects K2P channels is controversial. Here we show that K2P K+ channel <span class="hlt">TASK</span>-2 requires PI(<span class="hlt">4,5</span>)P2 for activity, a dependence that accounts for its run down in the absence of intracellular ATP and its full recovery by addition of exogenous PI(<span class="hlt">4,5</span>)P2, its inhibition by low concentrations of polycation PI scavengers, and inhibition by PI(<span class="hlt">4,5</span>)P2 depletion from the membrane. Comprehensive mutagenesis suggests that PI(<span class="hlt">4,5</span>)P2 interaction with <span class="hlt">TASK</span>-2 takes place at C-terminus where three basic aminoacids are identified as being part of a putative binding site. PMID:28358046</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28358046','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28358046"><span>Phosphatidylinositol (<span class="hlt">4,5</span>)-bisphosphate dynamically regulates the K2P background K+ channel <span class="hlt">TASK</span>-2.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Niemeyer, María Isabel; Cid, L Pablo; Paulais, Marc; Teulon, Jacques; Sepúlveda, Francisco V</p> <p>2017-03-30</p> <p>Two-pore domain K 2P K + channels responsible for the background K + conductance and the resting membrane potential, are also finely regulated by a variety of chemical, physical and physiological stimuli. Hormones and transmitters acting through Gq protein-coupled receptors (GqPCRs) modulate the activity of various K 2P channels but the signalling involved has remained elusive, in particular whether dynamic regulation by membrane PI(<span class="hlt">4,5</span>)P 2 , common among other classes of K + channels, affects K 2P channels is controversial. Here we show that K 2P K + channel <span class="hlt">TASK</span>-2 requires PI(<span class="hlt">4,5</span>)P 2 for activity, a dependence that accounts for its run down in the absence of intracellular ATP and its full recovery by addition of exogenous PI(<span class="hlt">4,5</span>)P 2 , its inhibition by low concentrations of polycation PI scavengers, and inhibition by PI(<span class="hlt">4,5</span>)P 2 depletion from the membrane. Comprehensive mutagenesis suggests that PI(<span class="hlt">4,5</span>)P 2 interaction with <span class="hlt">TASK</span>-2 takes place at C-terminus where three basic aminoacids are identified as being part of a putative binding site.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28033477','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28033477"><span>The Stationary-Gaze <span class="hlt">Task</span> Should Not Be Systematically Used as the <span class="hlt">Control</span> <span class="hlt">Task</span> in Studies of Postural <span class="hlt">Control</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bonnet, Cédrick T; Szaffarczyk, Sébastien</p> <p>2017-01-01</p> <p>In studies of postural <span class="hlt">control</span>, a <span class="hlt">control</span> <span class="hlt">task</span> is often used to understand significant effects obtained with experimental manipulations. This <span class="hlt">task</span> should be the easiest <span class="hlt">task</span> and (therefore) engage the lowest behavioral variability and cognitive workload. Since 1983, the stationary-gaze <span class="hlt">task</span> is considered as the most relevant <span class="hlt">control</span> <span class="hlt">task</span>. Instead, the authors expected that free looking at small targets (white paper or images; visual angle: 12°) could be an easier <span class="hlt">task</span>. To verify this assumption, 16 young individuals performed stationary-gaze, white-panel, and free-viewing 12° <span class="hlt">tasks</span> in steady and relaxed stances. The stationary-gaze <span class="hlt">task</span> led to significantly higher cognitive workload (mean score in the National Aeronotics and Space Administration <span class="hlt">Task</span> Load Index questionnaire), higher interindividual body (head, neck, and lower back) linear variability, and higher interindividual body angular variability-not systematically yet-than both other <span class="hlt">tasks</span>. There was more cognitive workload in steady than relaxed stances. The authors also tested if a free-viewing 24° <span class="hlt">task</span> could lead to greater angular displacement, and hence greater body sway, than could the other <span class="hlt">tasks</span> in relaxed stance. Unexpectedly, the participants mostly moved their eyes and not their body in this <span class="hlt">task</span>. In the discussion, the authors explain why the stationary-gaze <span class="hlt">task</span> may not be an ideal <span class="hlt">control</span> <span class="hlt">task</span> and how to choose this neutral <span class="hlt">task</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.springerlink.com/content/nh2jatcl12gr6ldr/','USGSPUBS'); return false;" href="http://www.springerlink.com/content/nh2jatcl12gr6ldr/"><span>Predicting <span class="hlt">mercury</span> in mallard ducklings from <span class="hlt">mercury</span> in chorioallantoic membranes</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, G.H.; Hoffman, D.J.</p> <p>2003-01-01</p> <p>Methylmercury has been suspected as a cause of impaired reproduction in wild birds, but the confounding effects of other environmental stressors has made it difficult to determine how much <span class="hlt">mercury</span> in the eggs of these wild species is harmful. Even when a sample egg can be collected from the nest of a wild bird and the <span class="hlt">mercury</span> concentration in that egg compared to the laboratory-derived thresholds for reproductive impairment, additional information on the <span class="hlt">mercury</span> levels in other eggs from that nest would be helpful in determining whether harmful levels of <span class="hlt">mercury</span> were present in the clutch. The measurement of <span class="hlt">mercury</span> levels in chorioallantoic membranes offers a possible way to estimate how much <span class="hlt">mercury</span> was in a chick that hatched from an egg, and also in the whole fresh egg itself. While an embryo is developing, wastes are collected in a sac called the chorioallantoic membranes, which often remain inside the eggshell and can be collected for contaminant analysis. We fed methylmercury to captive mallards to generate a broad range of <span class="hlt">mercury</span> levels in eggs, allowed the eggs to hatch normally, and then compared <span class="hlt">mercury</span> concentrations in the hatchling versus the chorioallantoic membranes left behind in the eggshell. When the data from eggs laid by <span class="hlt">mercury</span>- treated females were expressed as common logarithms, a linear equation was created by which the concentration of <span class="hlt">mercury</span> in a duckling could be predicted from the concentration of <span class="hlt">mercury</span> in the chorioallantoic membranes from the same egg. Therefore, if it were not possible to collect a sample egg from a clutch of wild bird eggs, the collection of the chorioallantoic membranes could be substituted, and the <span class="hlt">mercury</span> predicted to be in the chick or whole egg could be compared to the thresholds of <span class="hlt">mercury</span> that have been shown to cause harm in <span class="hlt">controlled</span> feeding studies with pheasants, chickens, and mallards.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19950014334','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19950014334"><span>A strategy of cost <span class="hlt">control</span> for Mariner Venus/<span class="hlt">Mercury</span> 1973</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Biggs, John R.; Downhower, Walter J.</p> <p>1994-01-01</p> <p>The spacecraft launched by NASA on November 3, 1973 to explore Venus and <span class="hlt">Mercury</span> proved a notable success as a development project both in space and on the ground. This article on the development points our management approaches and techniques that kept schedules and <span class="hlt">controlled</span> costs, the intent being to stimulate thought about how to do the same with future spacecraft and payloads. The Mariner Venus/<span class="hlt">Mercury</span> '73 (MVM '73) project kept within its originally established goals for schedule, performance, and cost. Underlying this development success was the availability of the Mariner technology. But meeting the goals demanded management determination, planning, and discipline to make optimum use of state-of-the-art technology--on the part of people at NASA, JPL, and The Boeing Co. (the contractor).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20010124870&hterms=Crustal+tectonics&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DCrustal%2Btectonics','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20010124870&hterms=Crustal+tectonics&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DCrustal%2Btectonics"><span>Constraining the Mean Crustal Thickness on <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Nimmo, F.</p> <p>2001-01-01</p> <p>The topography of <span class="hlt">Mercury</span> is poorly known, with only limited radar and stereo coverage available. However, radar profiles reveal topographic contrasts of several kilometers over wavelengths of approximately 1000 km. The bulk of <span class="hlt">Mercury</span>'s geologic activity took place within the first 1 Ga of the planet's history), and it is therefore likely that these topographic features derive from this period. On Earth, long wavelength topographic features are supported either convectively, or through some combination of isostasy and flexure. Photographic images show no evidence for plume-like features, nor for plate tectonics; I therefore assume that neither convective support nor Pratt isostasy are operating. The composition and structure of the crust of <span class="hlt">Mercury</span> are almost unknown. The reflectance spectrum of the surface of <span class="hlt">Mercury</span> is similar to that of the lunar highlands, which are predominantly plagioclase. Anderson et al. used the observed center-of-mass center-of-figure offset together with an assumption of Airy isostasy to infer a crustal thickness of 100-300 km. Based on tidal despinning arguments, the early elastic thickness (T(sub e)) of the (unfractured) lithosphere was approximately equal to or less than 100 km. Thrust faults with lengths of up to 500 km and ages of about 4 Ga B.P. are known to exist on <span class="hlt">Mercury</span>. Assuming a semicircular slip distribution and a typical thrust fault angle of 10 degrees, the likely vertical depth to the base of these faults is about <span class="hlt">45</span> km. More sophisticated modelling gives similar or slightly smaller answers. The depth to the base of faulting and the elastic layer are usually similar on Earth, and both are thought to be thermally <span class="hlt">controlled</span>. Assuming that the characteristic temperature is about 750 K, the observed fault depth implies that the heat flux at 4 Ga B.P. is unlikely to be less than 20 mW m(exp -2) for a linear temperature gradient. For an elastic thickness of <span class="hlt">45</span> km, topography at 1000 km wavelength is likely to be about 60</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFM.B23K..01M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFM.B23K..01M"><span>Toward a Unified Understanding of <span class="hlt">Mercury</span> and Methylated <span class="hlt">Mercury</span> from the World's Oceans</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>McNutt, M. K.; Krabbenhoft, D. P.; Landing, W. M.; Sunderland, E. M.</p> <p>2012-12-01</p> <p>Marine fish and shellfish are the main source of toxic methylmercury exposure for humans. As recently as decade ago, very limited aqueous methylated <span class="hlt">mercury</span> data were available from marine settings, resulting in a generally poor understanding of the processes <span class="hlt">controlling</span> <span class="hlt">mercury</span> in pelagic marine food webs. Recent oceanographic cruises have significantly improved availability of reliable measurements of methylated <span class="hlt">mercury</span> and total <span class="hlt">mercury</span> in seawater. This presentation will focus on vertical seawater profiles collected to depths 1000 m from three recent sampling efforts in collaboration with the CLIVAR Repeat Hydrography Program sponsored by NOAA including: 1) the northeastern Pacific (P16N cruise from Honolulu, Hawaii to Kodiak, Alaska); (2) the southern Indian Ocean (I5 cruise from Cape Town, South Africa, to Fremantle, Australia); and, (3) the Southern Ocean cruise (S4P from McMurdo, Antarctica, to Punta Arenas, Chile). Analytical results presented were all derived from the USGS <span class="hlt">Mercury</span> Research Lab (http://wi.water.usgs.gov/<span class="hlt">mercury</span>-lab). Supporting data derived from these cruises on water mass ages, nutrients, carbon and dissolved oxygen provide an opportunity to develop a stronger understanding of the biogeochemical factors <span class="hlt">controlling</span> oceanic distributions of <span class="hlt">mercury</span> and methylated <span class="hlt">mercury</span>. Whole-water, median total <span class="hlt">mercury</span>, and methylated <span class="hlt">mercury</span> concentrations for the northern Pacific, southern Indian, and Southern Ocean were 1.10, 0.80, and 1.65 pM, , and 0.11, 0.08, and 0.32 pM, respectively. For all three oceans, vertical profiles of total <span class="hlt">mercury</span> generally show the lowest concentrations in the surface mixed layer, and concentration maxima at the 700-1000 m depths. Surface depletion of total <span class="hlt">mercury</span> is attributed to photo-chemical reduction and evasion of gaseous elemental <span class="hlt">mercury</span> as well as scavenging by settling particulate matter, the main vector of transport to the subsurface ocean. Methylated <span class="hlt">mercury</span> in all the ocean profiles reveal distinct mid</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_5 --> <div id="page_6" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="101"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29035077','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29035077"><span><span class="hlt">Task</span> conflict and proactive <span class="hlt">control</span>: A computational theory of the Stroop <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kalanthroff, Eyal; Davelaar, Eddy J; Henik, Avishai; Goldfarb, Liat; Usher, Marius</p> <p>2018-01-01</p> <p>The Stroop <span class="hlt">task</span> is a central experimental paradigm used to probe cognitive <span class="hlt">control</span> by measuring the ability of participants to selectively attend to <span class="hlt">task</span>-relevant information and inhibit automatic <span class="hlt">task</span>-irrelevant responses. Research has revealed variability in both experimental manipulations and individual differences. Here, we focus on a particular source of Stroop variability, the reverse-facilitation (RF; faster responses to nonword neutral stimuli than to congruent stimuli), which has recently been suggested as a signature of <span class="hlt">task</span> conflict. We first review the literature that shows RF variability in the Stroop <span class="hlt">task</span>, both with regard to experimental manipulations and to individual differences. We suggest that <span class="hlt">task</span> conflict variability can be understood as resulting from the degree of proactive <span class="hlt">control</span> that subjects recruit in advance of the Stroop stimulus. When the proactive <span class="hlt">control</span> is high, <span class="hlt">task</span> conflict does not arise (or is resolved very quickly), resulting in regular Stroop facilitation. When proactive <span class="hlt">control</span> is low, <span class="hlt">task</span> conflict emerges, leading to a slow-down in congruent and incongruent (but not in neutral) trials and thus to Stroop RF. To support this suggestion, we present a computational model of the Stroop <span class="hlt">task</span>, which includes the resolution of <span class="hlt">task</span> conflict and its modulation by proactive <span class="hlt">control</span>. Results show that our model (a) accounts for the variability in Stroop-RF reported in the experimental literature, and (b) solves a challenge to previous Stroop models-their ability to account for reaction time distributional properties. Finally, we discuss theoretical implications to Stroop measures and <span class="hlt">control</span> deficits observed in some psychopathologies. (PsycINFO Database Record (c) 2018 APA, all rights reserved).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19890056380&hterms=faith&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dfaith','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19890056380&hterms=faith&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dfaith"><span><span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Vilas, Faith (Editor); Chapman, Clark R. (Editor); Matthews, Mildred Shapley (Editor)</p> <p>1988-01-01</p> <p>Papers are presented on future observations of and missions to <span class="hlt">Mercury</span>, the photometry and polarimetry of <span class="hlt">Mercury</span>, the surface composition of <span class="hlt">Mercury</span> from reflectance spectrophotometry, the Goldstone radar observations of <span class="hlt">Mercury</span>, the radar observations of <span class="hlt">Mercury</span>, the stratigraphy and geologic history of <span class="hlt">Mercury</span>, the geomorphology of impact craters on <span class="hlt">Mercury</span>, and the cratering record on <span class="hlt">Mercury</span> and the origin of impacting objects. Consideration is also given to the tectonics of <span class="hlt">Mercury</span>, the tectonic history of <span class="hlt">Mercury</span>, <span class="hlt">Mercury</span>'s thermal history and the generation of its magnetic field, the rotational dynamics of <span class="hlt">Mercury</span> and the state of its core, <span class="hlt">Mercury</span>'s magnetic field and interior, the magnetosphere of <span class="hlt">Mercury</span>, and the <span class="hlt">Mercury</span> atmosphere. Other papers are on the present bounds on the bulk composition of <span class="hlt">Mercury</span> and the implications for planetary formation processes, the building stones of the planets, the origin and composition of <span class="hlt">Mercury</span>, the formation of <span class="hlt">Mercury</span> from planetesimals, and theoretical considerations on the strange density of <span class="hlt">Mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19780006044','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19780006044"><span><span class="hlt">Mercury</span>'s helium exosphere after Mariner 10's third encounter</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Curtis, S. A.; Hartle, R. E.</p> <p>1977-01-01</p> <p>From Mariner 10 third encounter UV data, a value of .00045 was calculated as the fraction of the solar wind He++ flux intercepted and captured by <span class="hlt">Mercury</span>'s magnetosphere if the observed He atmosphere is maintained by the solar wind. If an internal source for He prevails, the corresponding upper bound for the global outgassing rate is estimated to be <span class="hlt">4.5</span> x 10 to the 22nd power per sec. A surface temperature distribution was used which satisfies the heat equation over <span class="hlt">Mercury</span>'s entire surface using Mariner 10 determined mean surface thermal characteristics. The means stand off distance of <span class="hlt">Mercury</span>'s magnetopause averaged over <span class="hlt">Mercury</span>'s orbit was also used.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28316351','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28316351"><span>Air Contamination by <span class="hlt">Mercury</span>, Emissions and Transformations-a Review.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gworek, Barbara; Dmuchowski, Wojciech; Baczewska, Aneta H; Brągoszewska, Paulina; Bemowska-Kałabun, Olga; Wrzosek-Jakubowska, Justyna</p> <p>2017-01-01</p> <p>The present and future air contamination by <span class="hlt">mercury</span> is and will continue to be a serious risk for human health. This publication presents a review of the literature dealing with the issues related to air contamination by <span class="hlt">mercury</span> and its transformations as well as its natural and anthropogenic emissions. The assessment of <span class="hlt">mercury</span> emissions into the air poses serious methodological problems. It is particularly difficult to distinguish between natural and anthropogenic emissions and re-emissions from lands and oceans, including past emissions. At present, the largest emission sources include fuel combustion, mainly that of coal, and "artisanal and small-scale gold mining" (ASGM). The distinctly highest emissions can be found in South and South-East Asia, accounting for <span class="hlt">45</span>% of the global emissions. The emissions of natural origin and re-emissions are estimated at <span class="hlt">45</span>-66% of the global emissions, with the largest part of emissions originating in the oceans. Forecasts on the future emission levels are not unambiguous; however, most forecasts do not provide for reductions in emissions. Ninety-five percent of <span class="hlt">mercury</span> occurring in the air is Hg 0 -GEM, and its residence time in the air is estimated at 6 to 18 months. The residence times of its Hg II -GOM and that in Hg p -TPM are estimated at hours and days. The highest <span class="hlt">mercury</span> concentrations in the air can be found in the areas of <span class="hlt">mercury</span> mines and those of ASGM. Since 1980 when it reached its maximum, the global background <span class="hlt">mercury</span> concentration in the air has remained at a relatively constant level.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29051439','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29051439"><span>Current <span class="hlt">Mercury</span> Exposure from Artisanal and Small-Scale Gold Mining in Bombana, Southeast Sulawesi, Indonesia-Future Significant Health Risks.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sakakibara, Masayuki; Sera, Koichiro</p> <p>2017-02-08</p> <p>The rapid expansion of the artisanal and small-scale gold mining (ASGM) industry in developing countries has marginalized the local communities in poverty, and resulted in occupational exposure to <span class="hlt">mercury</span> via the gold extraction process. We investigated the <span class="hlt">mercury</span> exposure of the mining workers lived inside and outside the mining area. Based on the occupations of the contributors, the hair samples were divided into three subgroups: directly exposed, indirectly exposed, and a <span class="hlt">control</span>. A total of 81 hair samples were analyzed by particle-induced X-ray emission spectrometry. The median <span class="hlt">mercury</span> concentration was highest in the hair from the directly exposed group (12.82 μg/g hair) (<span class="hlt">control</span> group median: 4.8 μg/g hair, p < 0.05), and the concentrations in hair from <span class="hlt">45</span> respondents exceeded the Human Biomonitoring I (HBM I) threshold limit. <span class="hlt">Mercury</span> concentrations were also elevated in the hair from the indirectly exposed group (median 7.64 μg/g hair, p < 0.05), and concentrations in hair from 24 respondents exceeded the HBM I threshold limits. Exposure to <span class="hlt">mercury</span> during ASGM presents health risks and is harmful for the miners; <span class="hlt">mercury</span> is also at hazardous levels for people who live in the mining area but who are not engaged in <span class="hlt">mercury</span>-based gold extraction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022521','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022521"><span>Assessing sorbent injection <span class="hlt">mercury</span> <span class="hlt">control</span> effectiveness in flue gas streams</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Carey, T.R.; Richardson, C.F.; Chang, R.; Meserole, F.B.; Rostam-Abadi, M.; Chen, S.</p> <p>2000-01-01</p> <p>One promising approach for removing <span class="hlt">mercury</span> from coal-fired, utility flue gas involves the direct injection of <span class="hlt">mercury</span> sorbents. Although this method has been effective at removing <span class="hlt">mercury</span> in municipal waste incinerators, tests conducted to date on utility coal-fired boilers show that <span class="hlt">mercury</span> removal is much more difficult in utility flue gas. EPRI is conducting research to investigate <span class="hlt">mercury</span> removal using sorbents in this application. Bench-scale, pilot-scale, and field tests have been conducted to determine the ability of different sorbents to remove <span class="hlt">mercury</span> in simulated and actual flue gas streams. This paper focuses on recent bench-scale and field test results evaluating the adsorption characteristics of activated carbon and fly ash and the use of these results to develop a predictive <span class="hlt">mercury</span> removal model. Field tests with activated carbon show that adsorption characteristics measured in the lab agree reasonably well with characteristics measured in the field. However, more laboratory and field data will be needed to identify other gas phase components which may impact performance. This will allow laboratory tests to better simulate field conditions and provide improved estimates of sorbent performance for specific sites. In addition to activated carbon results, bench-scale and modeling results using fly ash are presented which suggest that certain fly ashes are capable of adsorbing <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.P41A1589B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.P41A1589B"><span>Global <span class="hlt">Controlled</span> Mosaic of <span class="hlt">Mercury</span> from MESSENGER Orbital Images</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Becker, K. J.; Weller, L. A.; Edmundson, K. L.; Becker, T. L.; Robinson, M. S.; Solomon, S. C.</p> <p>2011-12-01</p> <p>The MESSENGER spacecraft entered orbit around <span class="hlt">Mercury</span> in March 2011. Since then, the <span class="hlt">Mercury</span> Dual Imaging System (MDIS) has been steadily acquiring images from the monochrome, narrow-angle camera (NAC) and the multispectral, wide-angle camera (WAC). With these images, the U.S. Geological Survey (USGS) is constructing a global, <span class="hlt">controlled</span> monochrome base map of the planet using the Integrated Software for Imagers and Spectrometers (ISIS3) [1]. Although the characterization of MESSENGER spacecraft's navigation and attitude data has proven to be reliable to date, an element of uncertainty in these parameters is unavoidable. This leads to registration offsets between images in the base map. To minimize these errors, images are <span class="hlt">controlled</span> using a least-squares bundle adjustment that provides refined spacecraft attitude and position parameters plus triangulated ground coordinates of image tie points. As a first effort, 4542 images (2781 NAC, 1761 WAC G filter) have been <span class="hlt">controlled</span> with a root mean squared error of 0.25 pixels in image space [2]. A preliminary digital elevation model (DEM) is also being produced from the large number of ground points (~ 47,000) triangulated in this adjustment. The region defined by these points ranges from 80°S to 86°N latitude and 158°E to 358°E longitude. A symmetric, unimodal distribution and a dynamic range of 10.5 km characterize the hypsometry of this area. Minimum, maximum, and mean elevations are -5.0, 5.5, and -0.2 km relative to the mean radius of <span class="hlt">Mercury</span> (2440 km) as defined by the mission. The USGS will use the DEM and base map for the construction of a registered color (WAC) map of high spatial integrity essential for reliable scientific interpretation of the color data. Ongoing improvements to the base map will be made as new images from MDIS become available, providing continuity in resolution, illumination, and viewing conditions. Additional bundle adjustments will further improve spacecraft attitude. The results from</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29772512','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29772512"><span>Distribution and speciation of <span class="hlt">mercury</span> affected by humic acid in mariculture sites at the Pearl River estuary.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ding, Lingyun; Zhao, Kaiyun; Zhang, Lijuan; Liang, Peng; Wu, Shengchun; Wong, Ming Hung; Tao, Huchun</p> <p>2018-05-14</p> <p>At the Pearl River Estuary of southern China, <span class="hlt">mercury</span> and its environmental problems have long been a great concern. This study investigated the distribution and speciation of <span class="hlt">mercury</span> compounds that are significantly influenced by the increasing content of humic acid (HA, a model natural organic matter) in this region. The inorganic <span class="hlt">mercury</span> and methyl <span class="hlt">mercury</span>, being adsorbed and converted at different HA levels, were studied in sediments and surface water at both mariculture and their reference sites. In mariculture sediments with higher HA content (up to <span class="hlt">4.5</span>%), more <span class="hlt">mercury</span> were adsorbed at different compound levels, promoting the methylation and accumulation of <span class="hlt">mercury</span> (P < 0.05) at the sediment-water interface. Seasonal shift in environmental temperature might <span class="hlt">control</span> the HA content, subsequently favouring <span class="hlt">mercury</span> methylation (maximum 1.75 ± 0.08 mg L -1 d -1 ) under warm weather conditions. In reference sites received less HA wastes, lower adsorption capacity and methylation rate were observed for <span class="hlt">mercury</span> in sediments and surface water. Our work points to the significant roles of HA on <span class="hlt">mercury</span> distribution and speciation both spatially and seasonally, thus addressing the impacts of mariculture activities on estuary eco-system. Copyright © 2018 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27726513','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27726513"><span>Working Memory Training Improves Dual-<span class="hlt">Task</span> Performance on Motor <span class="hlt">Tasks</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kimura, Takehide; Kaneko, Fuminari; Nagahata, Keita; Shibata, Eriko; Aoki, Nobuhiro</p> <p>2017-01-01</p> <p>The authors investigated whether working memory training improves motor-motor dual-<span class="hlt">task</span> performance consisted of upper and lower limb <span class="hlt">tasks</span>. The upper limb <span class="hlt">task</span> was a simple reaction <span class="hlt">task</span> and the lower limb <span class="hlt">task</span> was an isometric knee extension <span class="hlt">task</span>. <span class="hlt">45</span> participants (age = 21.8 ± 1.6 years) were classified into a working memory training group (WM-TRG), dual-<span class="hlt">task</span> training group, or <span class="hlt">control</span> group. The training duration was 2 weeks (15 min, 4 times/week). Our results indicated that working memory capacity increased significantly only in the WM-TRG. Dual-<span class="hlt">task</span> performance improved in the WM-TRG and dual-<span class="hlt">task</span> training group. Our study provides the novel insight that working memory training improves dual-<span class="hlt">task</span> performance without specific training on the target motor <span class="hlt">task</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16121271','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16121271"><span>Using Wet-FGD systems for <span class="hlt">mercury</span> removal.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Díaz-Somoano, Mercedes; Unterberger, Sven; Hein, Klaus R G</p> <p>2005-09-01</p> <p>A plan to <span class="hlt">control</span> <span class="hlt">mercury</span> emissions to the atmosphere and to establish <span class="hlt">mercury</span> emission limits has recently been elaborated by the European Commission, making it necessary to devise an efficient and cost effective <span class="hlt">mercury</span> removal technology. Towards this end wet flue gas desulfurization units appear as a promising option for multi-pollutant <span class="hlt">control</span>. However, more investigation on <span class="hlt">mercury</span> removal and a greater <span class="hlt">mercury</span> removal efficiency are required to achieve this objective. In the present work scrubber chemistry and the application of various solid additives to enhance <span class="hlt">mercury</span> removal in wet scrubbers is evaluated. The results obtained show a significant correlation between <span class="hlt">mercury</span> removal efficiency and the pH of the scrubber slurry and SO2 concentration. A weaker correlation was observed between oxygen or slurry concentration and removal efficiency. Finally several solid oxides were found to be effective additives for enhancing <span class="hlt">mercury</span> capture in wet scrubbers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/49418-mercury-municipal-solid-wastes-new-jersey-mercury-prevention-reduction-program','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/49418-mercury-municipal-solid-wastes-new-jersey-mercury-prevention-reduction-program"><span><span class="hlt">Mercury</span> in municipal solid wastes and New Jersey <span class="hlt">mercury</span> prevention and reduction program</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Erdogan, H.; Stevenson, E.</p> <p>1994-12-31</p> <p><span class="hlt">Mercury</span> is a very toxic heavy metal which accumulates in the brain causing neurological damages involving psychasthenic and vegetative syndrome. At high exposure levels it causes behavioral and personality changes, loss of memory and insomnia. Long-term exposure or exposure during pregnancy to <span class="hlt">mercury</span> or <span class="hlt">mercury</span> compounds can permanently damage the kidney and fetus. In addition to potential effects on human health, <span class="hlt">mercury</span> poisoning can also affect other living organisms. <span class="hlt">Mercury</span> is different than other heavy metals. It consistently biomagnifies and bioaccumulates within the aquatic food chain. Global sources of <span class="hlt">mercury</span> release are both natural and anthropogenic. Natural sources include volatilizationmore » of gaseous-<span class="hlt">mercury</span> iron soils ana rocks, volcanic releases, evaporation from the ocean and other water bodies. Anthropogenic sources are fuel and coal combustion, mining, smelting, manufacturing activities, disposal of sludge, pesticides, animal and food waste, and incineration of municipal solid waste. Worldwide combustion of municipal solid waste is the second largest source of atmospheric emission of <span class="hlt">mercury</span>. In New Jersey, incineration of solid waste is the largest source of atmospheric emission of <span class="hlt">mercury</span>. The New Jersey Department of Environmental Protection and Energy (NJDEPE) has developed a comprehensive program to <span class="hlt">control</span> and prevent emission of <span class="hlt">mercury</span> resulting from combustion municipal solid waste.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1163496','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1163496"><span>Geochemical, Genetic, and Community <span class="hlt">Controls</span> on <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Wall, Judy D.</p> <p>2014-11-10</p> <p>The sulfate-reducing bacteria (SRB) are soil bacteria that share two common characteristics, strict anaerobiosis and the ability to respire sulfate. The metabolic activities of these bacteria play significant roles in the global sulfur cycle, anaerobic degradation of biomass, biological metal corrosion in the environment and, recently, degradation of toxic compounds. The accumulation of evidence suggests these bacteria are also key to the production of the neurotoxin methylmercury in environmental settings. We propose to use our experience with the development of genetics in sulfate-reducing bacteria of the genus Desulfovibrio to create mutations that will eliminate the methylation of <span class="hlt">mercury</span>, thereby identifyingmore » the genes essential for this process. This information may allow the environmental monitoring of the <span class="hlt">mercury</span> methylation potential to learn the location and quantity of the production this toxin. From these data, more accurate predictive models of <span class="hlt">mercury</span> cycling can be generated.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23981029','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23981029"><span>Structural change of human hair induced by <span class="hlt">mercury</span> exposure.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xing, Xueqing; Du, Rong; Li, Yufeng; Li, Bai; Cai, Quan; Mo, Guang; Gong, Yu; Chen, Zhongjun; Wu, Zhonghua</p> <p>2013-10-01</p> <p><span class="hlt">Mercury</span> is one of the most hazardous pollutants in the environment. In this paper, the structural change of human hair induced by <span class="hlt">mercury</span> exposure was studied. Human hair samples were, respectively, collected from the normal Beijing area and the Hg-contaminated Wanshan area of the Guizhou Province, China. Inductively coupled plasma mass spectroscopy was used to detect the element contents. A small angle X-ray scattering technique was used to probe the structural change. Three reflections with 8.8, 6.7, and <span class="hlt">4.5</span> nm spacing were compared between the normal and the Hg-contaminated hair samples. The results confirm that the <span class="hlt">4.5</span> nm reflection is from the ordered fibrillar structure of glycosaminoglycan (GAG) in proteoglycan (PG) that composes the matrix around the intermediate filaments. The increase of Ca content makes the regular oriented fibrillar structure of GAG transform to a random oriented one, broadening the angular extent of the reflection with <span class="hlt">4.5</span> nm spacing. However, overdose Hg makes the core proteins where the ordered fibrils of GAG are attached become coiled, which destroys the ordered arrangements of fibrillar GAG in PG, resulting in the disappearance of the reflections with <span class="hlt">4.5</span> nm spacing. The disappearance of the <span class="hlt">4.5</span> nm reflection can be used as a bioindicator of overdose Hg contamination to the human body. A supercoiled-coil model of hair nanoscale structure and a possible mechanism of <span class="hlt">mercury</span> effect in human hair are proposed in this paper.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title21-vol8/pdf/CFR-2014-title21-vol8-sec880-2920.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title21-vol8/pdf/CFR-2014-title21-vol8-sec880-2920.pdf"><span>21 CFR 880.2920 - Clinical <span class="hlt">mercury</span> thermometer.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-04-01</p> <p>... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Clinical <span class="hlt">mercury</span> thermometer. 880.2920 Section 880... Devices § 880.2920 Clinical <span class="hlt">mercury</span> thermometer. (a) Identification. A clinical <span class="hlt">mercury</span> thermometer is a... <span class="hlt">mercury</span>. (b) Classification. Class II (special <span class="hlt">controls</span>). The device is exempt from the premarket...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title21-vol8/pdf/CFR-2013-title21-vol8-sec880-2920.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title21-vol8/pdf/CFR-2013-title21-vol8-sec880-2920.pdf"><span>21 CFR 880.2920 - Clinical <span class="hlt">mercury</span> thermometer.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-04-01</p> <p>... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Clinical <span class="hlt">mercury</span> thermometer. 880.2920 Section 880... Devices § 880.2920 Clinical <span class="hlt">mercury</span> thermometer. (a) Identification. A clinical <span class="hlt">mercury</span> thermometer is a... <span class="hlt">mercury</span>. (b) Classification. Class II (special <span class="hlt">controls</span>). The device is exempt from the premarket...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title21-vol8/pdf/CFR-2012-title21-vol8-sec880-2920.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title21-vol8/pdf/CFR-2012-title21-vol8-sec880-2920.pdf"><span>21 CFR 880.2920 - Clinical <span class="hlt">mercury</span> thermometer.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-04-01</p> <p>... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Clinical <span class="hlt">mercury</span> thermometer. 880.2920 Section 880... Devices § 880.2920 Clinical <span class="hlt">mercury</span> thermometer. (a) Identification. A clinical <span class="hlt">mercury</span> thermometer is a... <span class="hlt">mercury</span>. (b) Classification. Class II (special <span class="hlt">controls</span>). The device is exempt from the premarket...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title21-vol8/pdf/CFR-2011-title21-vol8-sec880-2920.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title21-vol8/pdf/CFR-2011-title21-vol8-sec880-2920.pdf"><span>21 CFR 880.2920 - Clinical <span class="hlt">mercury</span> thermometer.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-04-01</p> <p>... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Clinical <span class="hlt">mercury</span> thermometer. 880.2920 Section 880... Devices § 880.2920 Clinical <span class="hlt">mercury</span> thermometer. (a) Identification. A clinical <span class="hlt">mercury</span> thermometer is a... <span class="hlt">mercury</span>. (b) Classification. Class II (special <span class="hlt">controls</span>). The device is exempt from the premarket...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AtmEn..79..472R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AtmEn..79..472R"><span>Scenarios of global <span class="hlt">mercury</span> emissions from anthropogenic sources</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rafaj, P.; Bertok, I.; Cofala, J.; Schöpp, W.</p> <p>2013-11-01</p> <p>This paper discusses the impact of air quality and climate policies on global <span class="hlt">mercury</span> emissions in the time horizon up to 2050. Evolution of <span class="hlt">mercury</span> emissions is based on projections of energy consumption for a scenario without any global greenhouse gas mitigation efforts, and for a 2 °C climate policy scenario, which assumes internationally coordinated action to mitigate climate change. The assessment takes into account current air quality legislation in each country, as well as provides estimates of maximum feasible reductions in <span class="hlt">mercury</span> through 2050. Results indicate significant scope for co-benefits of climate policies for <span class="hlt">mercury</span> emissions. Atmospheric releases of <span class="hlt">mercury</span> from anthropogenic sources under the global climate mitigation regime are reduced in 2050 by <span class="hlt">45</span>% when compared to the case without climate measures. Around one third of world-wide co-benefits for <span class="hlt">mercury</span> emissions by 2050 occur in China. An annual Hg-abatement of about 800 tons is estimated for the coal combustion in power sector if the current air pollution legislation and climate policies are adopted in parallel.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63488&keyword=internet&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63488&keyword=internet&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">CONTROL</span> OF <span class="hlt">MERCURY</span> EMISSIONS FROM COAL-FIRED ELECTRIC UTILITY BOILERS: INTERIM REPORT</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The report provides additional information on <span class="hlt">mercury</span> (Hg) emissions <span class="hlt">control</span> following the release of "Study of Hazardous Air Pollutant Emissions from Electric Utility Steam Generating Units--Final Report to Congress" in February 1998. Chapters 1-3 describe EPA's December 2000 de...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=147063&Lab=NRMRL&keyword=Eco+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=147063&Lab=NRMRL&keyword=Eco+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>CHARACTERIZATION OF <span class="hlt">MERCURY</span>-ENRICHED COAL COMBUSTION RESIDUES FROM ELECTRIC UTILITIES USING ENHANCED SORBENTS FOR <span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span></span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Leaching of <span class="hlt">mercury</span> and other constituents of potential concern during land disposal or beneficial use of coal combustion residues (CCRs) is the environmental impact pathway evaluated in this report. The specific objectives of the research was to: (1) evaluate <span class="hlt">mercury</span>, arsenic an...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_6 --> <div id="page_7" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="121"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003IAUJD...2E...9S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003IAUJD...2E...9S"><span>Search for Feo and Pyroxene on <span class="hlt">MERCURY?S</span> Surface</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sprague, Ann L.; Emery, Joshua P.</p> <p></p> <p>Results from spectral observations of <span class="hlt">Mercury</span>'s surface in the wavelength range 0.8 to 5.5 micrometers will be reported. The data were obtained at the NASA Infrared Telescope Facility on Mauna Kea Hawaii. We used SpeX a long slit imaging system developed at the IRTF for high resolving power spatially resolved spectroscopy throughout the solar system. We aligned the spectral slit with <span class="hlt">Mercury</span>'s geographic longitude and systematically moved it across the Earth-facing disk to obtain multiple disk-resolved spectral images. The entire data set provides spatial coverage of the Earth-facing disk limited only by atmospheric turbulence and the diffraction limit for each wavelength. We used SpeX in two spectral regions in the R 2000 mode. In the first case between 0.8 and 2.5 micrometer to search for the 0.9 to 1.0 micrometer reflectance absorption feature caused by the Fe2+ electronic transfer in FeO. We also measured the <span class="hlt">4.5</span> to 5.5 micrometer flux from <span class="hlt">Mercury</span>. This is a region of diagnostic features caused by the presence of volume scattering in pyroxene and olivine. These data will be compared to previous observations that showed an anomalous emission feature at 5.5 micrometer and to others that exhibited a feature closely resembling that from pyroxene.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/990747','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/990747"><span><span class="hlt">Mercury</span> Emission Measurement at a CFB Plant</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>John Pavlish; Jeffrey Thompson; Lucinda Hamre</p> <p>2009-02-28</p> <p>In response to pending regulation to <span class="hlt">control</span> <span class="hlt">mercury</span> emissions in the United States and Canada, several projects have been conducted to perform accurate mass balances at pulverized coal (pc)-fired utilities. Part of the <span class="hlt">mercury</span> mass balance always includes total gaseous <span class="hlt">mercury</span> as well as a determination of the speciation of the <span class="hlt">mercury</span> emissions and a concentration bound to the particulate matter. This information then becomes useful in applying <span class="hlt">mercury</span> <span class="hlt">control</span> strategies, since the elemental <span class="hlt">mercury</span> has traditionally been difficult to <span class="hlt">control</span> by most technologies. In this instance, oxidation technologies have proven most beneficial for increased capture. Despite many years ofmore » <span class="hlt">mercury</span> measurement and <span class="hlt">control</span> projects at pc-fired units, far less work has been done on circulating fluidized-bed (CFB) units, which are able to combust a variety of feedstocks, including cofiring coal with biomass. Indeed, these units have proven to be more problematic because it is very difficult to obtain a reliable <span class="hlt">mercury</span> mass balance. These units tend to have very different temperature profiles than pc-fired utility boilers. The flexibility of CFB units also tends to be an issue when a <span class="hlt">mercury</span> balance is determined, since the <span class="hlt">mercury</span> inputs to the system come from the bed material and a variety of fuels, which can have quite variable chemistry, especially for <span class="hlt">mercury</span>. In addition, as an integral part of the CFB operation, the system employs a feedback loop to circulate the bed material through the combustor and the solids collection system (the primary cyclone), thereby subjecting particulate-bound metals to higher temperatures again. Despite these issues, CFB boilers generally emit very little <span class="hlt">mercury</span> and show good native capture. The Energy & Environmental Research Center is carrying out this project for Metso Power in order to characterize the fate of <span class="hlt">mercury</span> across the unit at Rosebud Plant, an industrial user of CFB technology from Metso. Appropriate solids were</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/20969915-deposition-cycling-sulfur-controls-mercury-accumulation-isle-royale-fish','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/20969915-deposition-cycling-sulfur-controls-mercury-accumulation-isle-royale-fish"><span>Deposition and cycling of sulfur <span class="hlt">controls</span> <span class="hlt">mercury</span> accumulation in Isle Royale fish</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Paul E. Drevnick; Donald E. Canfield; Patrick R. Gorski</p> <p>2007-11-01</p> <p><span class="hlt">Mercury</span> contamination of fish is a global problem. Consumption of contaminated fish is the primary route of methylmercury exposure in humans and is detrimental to health. Newly mandated reductions in anthropogenic <span class="hlt">mercury</span> emissions aim to reduce atmospheric <span class="hlt">mercury</span> deposition and thus <span class="hlt">mercury</span> concentrations in fish. However, factors other than <span class="hlt">mercury</span> deposition are important for <span class="hlt">mercury</span> bioaccumulation in fish. In the lakes of Isle Royale, U.S.A., reduced rates of sulfate deposition since the Clean Air Act of 1970 have caused <span class="hlt">mercury</span> concentrations in fish to decline to levels that are safe for human consumption, even without a discernible decrease in mercurymore » deposition. Therefore, reductions in anthropogenic sulfur emissions may provide a synergistic solution to the <span class="hlt">mercury</span> problem in sulfate-limited freshwaters. 71 refs., 3 figs., 1 tab.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21097849','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21097849"><span>Contextual <span class="hlt">control</span> over <span class="hlt">task</span>-set retrieval.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Crump, Matthew J C; Logan, Gordon D</p> <p>2010-11-01</p> <p>Contextual cues signaling <span class="hlt">task</span> likelihood or the likelihood of <span class="hlt">task</span> repetition are known to modulate the size of switch costs. We follow up on the finding by Leboe, Wong, Crump, and Stobbe (2008) that location cues predictive of the proportion of switch or repeat trials modulate switch costs. Their design employed one cue per <span class="hlt">task</span>, whereas our experiment employed two cues per <span class="hlt">task</span>, which allowed separate assessment of modulations to the cue-repetition benefit, a measure of lower level cue-encoding processes, and to the <span class="hlt">task</span>-alternation cost, a measure of higher level processes representing <span class="hlt">task</span>-set information. We demonstrate that location information predictive of switch proportion modulates performance at the level of <span class="hlt">task</span>-set representations. Furthermore, we demonstrate that contextual <span class="hlt">control</span> occurs even when subjects are unaware of the associations between context and switch likelihood. We discuss the notion that contextual information provides rapid, unconscious <span class="hlt">control</span> over the extent to which prior <span class="hlt">task</span>-set representations are retrieved in the service of guiding online performance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70169995','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70169995"><span><span class="hlt">Mercury</span> and halogens in coal: Chapter 2</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kolker, Allan; Quick, Jeffrey C.; Granite, Evan J.; Pennline, Henry W.; Senior, Constance L.</p> <p>2014-01-01</p> <p>Apart from <span class="hlt">mercury</span> itself, coal rank and halogen content are among the most important factors inherent in coal that determine the proportion of <span class="hlt">mercury</span> captured by conventional <span class="hlt">controls</span> during coal combustion. This chapter reviews how <span class="hlt">mercury</span> in coal occurs, gives available concentration data for <span class="hlt">mercury</span> in U.S. and international commercial coals, and provides an overview of the natural variation in halogens that influence <span class="hlt">mercury</span> capture. Three databases, the U.S. Geological Survey coal quality (USGS COALQUAL) database for in-ground coals, and the 1999 and 2010 U.S. Environmental Protection Agency (EPA) Information Collection Request (ICR) databases for coals delivered to power stations, provide extensive results for <span class="hlt">mercury</span> and other parameters that are compared in this chapter. In addition to the United States, detailed characterization of <span class="hlt">mercury</span> is available on a nationwide basis for China, whose mean values in recent compilations are very similar to the United States in-ground mean of 0.17 ppm <span class="hlt">mercury</span>. Available data for the next five largest producers (India, Australia, South Africa, the Russian Federation, and Indonesia) are more limited and with the possible exceptions of Australia and the Russian Federation, do not allow nationwide means for <span class="hlt">mercury</span> in coal to be calculated. Chlorine in coal varies as a function of rank and correspondingly, depth of burial. As discussed elsewhere in this volume, on a proportional basis, bromine is more effective than chlorine in promoting <span class="hlt">mercury</span> oxidation in flue gas and capture by conventional <span class="hlt">controls</span>. The ratio of bromine to chlorine in coal is indicative of the proportion of halogens present in formation waters within a coal basin. This ratio is relatively constant except in coals that have interacted with deep-basin brines that have reached halite saturation, enriching residual fluids in bromine. Results presented here help optimize <span class="hlt">mercury</span> capture by conventional <span class="hlt">controls</span> and provide a starting point for</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26197424','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26197424"><span><span class="hlt">Mercury</span>-impacted scrap metal: Source and nature of the <span class="hlt">mercury</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Finster, Molly E; Raymond, Michelle R; Scofield, Marcienne A; Smith, Karen P</p> <p>2015-09-15</p> <p>The reuse and recycling of industrial solid wastes such as scrap metal is supported and encouraged both internationally and domestically, especially when such wastes can be used as substitutes for raw material. However, scrap metal processing facilities, such as mini-mills, have been identified as a source of <span class="hlt">mercury</span> (Hg) emissions in the United States. This research aims to better define some of the key issues related to the source and nature of <span class="hlt">mercury</span> in the scrap metal waste stream. Overall, it is difficult to pinpoint the key <span class="hlt">mercury</span> sources feeding into scrap metal recycling facilities, quantify their associated <span class="hlt">mercury</span> concentrations, or determine which chemical forms are most significant. Potential sources of <span class="hlt">mercury</span> in scrap metal include <span class="hlt">mercury</span> switches from discarded vehicles, electronic-based scrap from household appliances and related industrial systems, and Hg-impacted scrap metal from the oil and gas industry. The form of <span class="hlt">mercury</span> associated with scrap metal varies and depends on the source type. The specific amount of <span class="hlt">mercury</span> that can be adsorbed and retained by steel appears to be a function of both metallurgical and environmental factors. In general, the longer the steel is in contact with a fluid or condensate that contains measurable concentrations of elemental <span class="hlt">mercury</span>, the greater the potential for <span class="hlt">mercury</span> accumulation in that steel. Most <span class="hlt">mercury</span> compounds are thermally unstable at elevated temperatures (i.e., above 350 °C). As such, the <span class="hlt">mercury</span> associated with impacted scrap is expected to be volatilized out of the metal when it is heated during processing (e.g., shredding or torch cutting) or melted in a furnace. This release of fugitive gas (Hg vapor) and particulates, as well as Hg-impacted bag-house dust and <span class="hlt">control</span> filters, could potentially pose an occupational exposure risk to workers at a scrap metal processing facility. Thus, identifying and characterizing the key sources of Hg-impacted scrap, and understanding the nature and extent</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25594253','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25594253"><span><span class="hlt">Mercury</span> content in marketed cosmetics: analytical survey in Shijiazhuang, China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Li; Zhang, Hong</p> <p>2015-01-01</p> <p><span class="hlt">Mercury</span> is one of the skin-lightening ingredients in cosmetics as <span class="hlt">mercury</span> ions are thought to inhibit the synthesis of the skin pigment melanin in melanocyte cells. The objective of this study was to evaluate the <span class="hlt">mercury</span> levels of cosmetics currently marketed in Shijiazhuang, a northern city in China. We collected 146 random cosmetic samples and analyzed for <span class="hlt">mercury</span> concentrations or levels by cold vapor atomic absorption spectrometry. Among the 146 samples, 134 (91.8%) were positive for <span class="hlt">mercury</span>, and the concentrations of <span class="hlt">mercury</span> ranged from not detectable to 592 ng/g. Cosmetic samples for children and babies had the highest detection rate (100%), followed by shampoo and hair conditioner (92.3%) and skin-lightening cream (92.0%). All of them were lower than the acceptable limit (1 μg/g) in China. Cosmetics for skin had the highest mean <span class="hlt">mercury</span> content (<span class="hlt">45</span> ng/g), followed by hair products (42.1 ng/g). The concentrations of <span class="hlt">mercury</span> detected in samples were lower than the current legal limit in China, indicating it may not pose a risk to consumers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25119602','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25119602"><span>Chronic atrophic gastritis in association with hair <span class="hlt">mercury</span> level.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xue, Zeyun; Xue, Huiping; Jiang, Jianlan; Lin, Bing; Zeng, Si; Huang, Xiaoyun; An, Jianfu</p> <p>2014-11-01</p> <p>The objective of this study was to explore hair <span class="hlt">mercury</span> level in association with chronic atrophic gastritis, a precancerous stage of gastric cancer (GC), and thus provide a brand new angle of view on the timely intervention of precancerous stage of GC. We recruited 149 healthy volunteers as <span class="hlt">controls</span> and 152 patients suffering from chronic gastritis as cases. The <span class="hlt">controls</span> denied upper gastrointestinal discomforts, and the cases were diagnosed as chronic superficial gastritis (n=68) or chronic atrophic gastritis (n=84). We utilized <span class="hlt">Mercury</span> Automated Analyzer (NIC MA-3000) to detect hair <span class="hlt">mercury</span> level of both healthy <span class="hlt">controls</span> and cases of chronic gastritis. The statistic of measurement data was expressed as mean ± standard deviation, which was analyzed using Levene variance equality test and t test. Pearson correlation analysis was employed to determine associated factors affecting hair <span class="hlt">mercury</span> levels, and multiple stepwise regression analysis was performed to deduce regression equations. Statistical significance is considered if p value is less than 0.05. The overall hair <span class="hlt">mercury</span> level was 0.908949 ± 0.8844490 ng/g [mean ± standard deviation (SD)] in gastritis cases and 0.460198 ± 0.2712187 ng/g (mean±SD) in healthy <span class="hlt">controls</span>; the former level was significantly higher than the latter one (p=0.000<0.01). The hair <span class="hlt">mercury</span> level in chronic atrophic gastritis subgroup was 1.155220 ± 0.9470246 ng/g (mean ± SD) and that in chronic superficial gastritis subgroup was 0.604732 ± 0.6942509 ng/g (mean ± SD); the former level was significantly higher than the latter level (p<0.01). The hair <span class="hlt">mercury</span> level in chronic superficial gastritis cases was significantly higher than that in healthy <span class="hlt">controls</span> (p<0.05). The hair <span class="hlt">mercury</span> level in chronic atrophic gastritis cases was significantly higher than that in healthy <span class="hlt">controls</span> (p<0.01). Stratified analysis indicated that the hair <span class="hlt">mercury</span> level in healthy <span class="hlt">controls</span> with eating seafood was significantly higher than that in healthy</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.epa.gov/mercury/mercury-study-report-congress','PESTICIDES'); return false;" href="https://www.epa.gov/mercury/mercury-study-report-congress"><span><span class="hlt">Mercury</span> Study Report to Congress</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>EPA's Report to Congress on <span class="hlt">Mercury</span> provides an assessment of the magnitude of U.S. <span class="hlt">mercury</span> emissions by source, the health and environmental implications of those emissions, and the availability and cost of <span class="hlt">control</span> technologies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1338816','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1338816"><span><span class="hlt">Mercury</span> speciation comparison. BrooksApplied Laboratories and Eurofins Frontier Global Sciences</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Bannochie, C. J.; Wilmarth, W. R.</p> <p>2016-12-16</p> <p>The Savannah River National Laboratory (SRNL) was <span class="hlt">tasked</span> with preparing and shipping samples for Hg speciation by Eurofins Frontier Global Sciences (FGS), Inc. in Bothell, WA on behalf of the Savannah River Remediation (SRR) <span class="hlt">Mercury</span> Program Team. These samples were analyzed for seven species including: total <span class="hlt">mercury</span>, dissolved <span class="hlt">mercury</span>, inorganic <span class="hlt">mercury</span> ((Hg(I) and Hg(II)), elemental <span class="hlt">mercury</span>, methylmercury, ethylmercury, and dimethylmercury, with an eighth species, particulate <span class="hlt">mercury</span>, calculated from the difference between total and dissolved <span class="hlt">mercury</span> after subtracting the elemental <span class="hlt">mercury</span>. The species fraction of total <span class="hlt">mercury</span> measured has ranged broadly from a low of 32% to a high of 146%,more » though the vast majority of samples have been <100%. This can be expected since one is summing multiple values that each have at least a ± 20% measurement uncertainty. Two liquid waste tanks particularly important to understanding the distribution of <span class="hlt">mercury</span> species in the Savannah River Site (SRS) Tank Farm were selected for a round robin analysis by Eurofins FGS and BrooksApplied Laboratories (BAL). The analyses conducted by BAL on the Tank 22 and 38 samples and their agreement with those obtained from Eurofins FGS for total <span class="hlt">mercury</span>, dissolved <span class="hlt">mercury</span>, methylmercury, ethylmercury, and dimethylmercury provide a strong degree of confidence in these species measurements« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=90660&keyword=lime&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=90660&keyword=lime&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>EMISSION TEST REPORT, OMSS FIELD TEST ON CARBON INJECTION FOR <span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span></span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The report discusses results of a parametric evaluation of powdered activated carbon for <span class="hlt">control</span> of <span class="hlt">mercury</span> (Hg) emission from a municipal waste cornbustor (MWC) equipped with a lime spray dryer absorber/fabric filter (SD/FF). The primary test objectives were to evaluate the effe...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/868666','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/868666"><span>Method of <span class="hlt">controlling</span> the <span class="hlt">mercury</span> vapor pressure in a photo-chemical lamp or vapor filter used for Hg.sup.196 enrichment</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, Mark W.</p> <p>1993-01-01</p> <p>The present invention is directed to a method of eliminating the cold spot zones presently used on Hg.sup.196 isotope separation lamps and filters by the use of a <span class="hlt">mercury</span> amalgams, preferably <span class="hlt">mercury</span> - indium amalgams. The use of an amalgam affords optimization of the <span class="hlt">mercury</span> density in the lamp and filter of a <span class="hlt">mercury</span> enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to <span class="hlt">control</span> the spectral line width of radiation emitted from lamps, a requirement for <span class="hlt">mercury</span> enrichment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6296835','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/6296835"><span>Method of <span class="hlt">controlling</span> the <span class="hlt">mercury</span> vapor pressure in a photo-chemical lamp or vapor filter used for Hg[sup 196] enrichment</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, M.W.</p> <p>1993-02-16</p> <p>The present invention is directed to a method of eliminating the cold spot zones presently used on Hg[sup 196] isotope separation lamps and filters by the use of a <span class="hlt">mercury</span> amalgams, preferably <span class="hlt">mercury</span> - indium amalgams. The use of an amalgam affords optimization of the <span class="hlt">mercury</span> density in the lamp and filter of a <span class="hlt">mercury</span> enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to <span class="hlt">control</span> the spectral line width of radiation emitted from lamps, a requirement for <span class="hlt">mercury</span> enrichment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.atsdr.cdc.gov/mercury/mercury_report.html','NIH-MEDLINEPLUS'); return false;" href="https://www.atsdr.cdc.gov/mercury/mercury_report.html"><span><span class="hlt">Mercury</span> Report-Children's exposure to elemental <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... gov . <span class="hlt">Mercury</span> Background <span class="hlt">Mercury</span> Report Additional Resources <span class="hlt">Mercury</span> Report - Children's Exposure to Elemental <span class="hlt">Mercury</span> Recommend on Facebook ... I limit exposure to <span class="hlt">mercury</span>? Why was the report written? Children attending a daycare in New Jersey ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24524696','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24524696"><span>Dissolved organic matter kinetically <span class="hlt">controls</span> <span class="hlt">mercury</span> bioavailability to bacteria.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chiasson-Gould, Sophie A; Blais, Jules M; Poulain, Alexandre J</p> <p>2014-03-18</p> <p>Predicting the bioavailability of inorganic <span class="hlt">mercury</span> (Hg) to bacteria that produce the potent bioaccumulative neurotoxin monomethylmercury remains one of the greatest challenges in predicting the environmental fate and transport of Hg. Dissolved organic matter (DOM) affects <span class="hlt">mercury</span> methylation due to its influence on cell physiology (as a potential nutrient) and its influence on Hg(II) speciation in solution (as a complexing agent), therefore <span class="hlt">controlling</span> Hg bioavailability. We assessed the role of DOM on Hg(II) bioavailability to a gram-negative bacterium bioreporter under oxic pseudo- and nonequilibrium conditions, using defined media and field samples spanning a wide range of DOM levels. Our results showed that Hg(II) was considerably more bioavailable under nonequilibrium conditions than when DOM was absent or when Hg(II) and DOM had reached pseudoequilibrium (24 h) prior to cell exposure. Under these enhanced uptake conditions, Hg(II) bioavailability followed a bell shaped curve as DOM concentrations increased, both for defined media and natural water samples, consistent with bioaccumulation results in a companion paper (this issue) observed for amphipods. Experiments also suggest that DOM may not only provide shuttle molecules facilitating Hg uptake, but also alter cell wall properties to facilitate the first steps toward Hg(II) internalization. We propose the existence of a short-lived yet critical time window (<24 h) during which DOM facilitates the entry of newly deposited Hg(II) into aquatic food webs, suggesting that the bulk of <span class="hlt">mercury</span> incorporation in aquatic food webs would occur within hours following its deposition from the atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17739377','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17739377"><span>Discovery of sodium in the atmosphere of <span class="hlt">mercury</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Potter, A; Morgan, T</p> <p>1985-08-16</p> <p>The spectrum of <span class="hlt">Mercury</span> at the Fraunhofer sodium D lines shows strong emission features that are attributed to resonant scattering of sunlight from sodium vapor in the atmosphere of the planet. The total column abundance of sodium was estimated to be 8.1 x 10(11) atoms per square centimeter, which corresponds to a surface density at the subsolar point of about 1.5 x 10(5) atoms per cubic centimeter. The most abundant atmospheric species found by the Mariner 10 mission to <span class="hlt">Mercury</span> was helium, with a surface density of <span class="hlt">4.5</span> x 10(3) atoms per cubic centimeter. It now appears that sodium vapor is a major constituent of <span class="hlt">Mercury</span>'s atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26731605','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26731605"><span>Subacute effects of low dose lead nitrate and <span class="hlt">mercury</span> chloride exposure on kidney of rats.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Apaydın, Fatma Gökçe; Baş, Hatice; Kalender, Suna; Kalender, Yusuf</p> <p>2016-01-01</p> <p>Lead nitrate and <span class="hlt">mercury</span> chloride are the most common heavy metal pollutants. In the present study, the effects of lead and <span class="hlt">mercury</span> induced nephrotoxicity were studied in Wistar rats. Lead nitrate (LN, <span class="hlt">45</span> mg/kg b.w/day) and <span class="hlt">mercury</span> chloride (MC, 0.02 mg/kg b.w/day) and their combination were administered orally for 28 days. Four groups of rats were used in the study: <span class="hlt">control</span>, LN, MC and LN plus MC groups. Serum biochemical parameters, lipid peroxidation, antioxidant enzymes and histopathological changes in kidney tissues were investigated in all treatment groups. LN and MC caused severe histopathological changes. It was shown that LN, MC and also co-treatment with LN and MC exposure induced significant increase in serum urea, uric acid and creatinine levels. There were also statistically significant changes in antioxidant enzyme activities (SOD, CAT, GPx and GST) and lipid peroxidation (MDA) in all groups except <span class="hlt">control</span> group. In this study, we showed that MC caused more harmful effects than LN in rats. Copyright © 2015 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24239452','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24239452"><span><span class="hlt">Task</span> specific grip force <span class="hlt">control</span> in writer's cramp.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schneider, A S; Fürholzer, W; Marquardt, C; Hermsdörfer, J</p> <p>2014-04-01</p> <p>Writer's cramp is defined as a <span class="hlt">task</span> specific focal dystonia generating hypertonic muscle co-contractions during handwriting resulting in impaired writing performance and exaggerated finger force. However, little is known about the generalisation of grip force across <span class="hlt">tasks</span> others than writing. The aim of the study was to directly compare regulation of grip forces during handwriting with force regulation in other fine-motor <span class="hlt">tasks</span> in patients and <span class="hlt">control</span> subjects. Handwriting, lifting and cyclic movements of a grasped object were investigated in 21 patients and 14 <span class="hlt">controls</span>. The applied forces were registered in all three <span class="hlt">tasks</span> and compared between groups and <span class="hlt">tasks</span>. In addition, <span class="hlt">task</span>-specific measures of fine-motor skill were assessed. As expected, patients generated exaggerated forces during handwriting compared to <span class="hlt">control</span> subjects. However there were no statistically significant group differences during lifting and cyclic movements. The <span class="hlt">control</span> group revealed a generalisation of grip forces across manual <span class="hlt">tasks</span> whereas in patients there was no such correlation. We conclude that increased finger forces during handwriting are a <span class="hlt">task</span>-specific phenomenon that does not necessarily generalise to other fine-motor <span class="hlt">tasks</span>. Force <span class="hlt">control</span> of patients with writer's cramp in handwriting and other fine-motor <span class="hlt">tasks</span> is characterised by individualised <span class="hlt">control</span> strategies. Copyright © 2013 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28056794','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28056794"><span><span class="hlt">Mercury</span> exposure and risk of cardiovascular disease: a nested case-<span class="hlt">control</span> study in the PREDIMED (PREvention with MEDiterranean Diet) study.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Downer, Mary K; Martínez-González, Miguel A; Gea, Alfredo; Stampfer, Meir; Warnberg, Julia; Ruiz-Canela, Miguel; Salas-Salvadó, Jordi; Corella, Dolores; Ros, Emilio; Fitó, Montse; Estruch, Ramon; Arós, Fernando; Fiol, Miquel; Lapetra, José; Serra-Majem, Lluís; Bullo, Monica; Sorli, Jose V; Muñoz, Miguel A; García-Rodriguez, Antonio; Gutierrez-Bedmar, Mario; Gómez-Gracia, Enrique</p> <p>2017-01-05</p> <p>Substantial evidence suggests that consuming 1-2 servings of fish per week, particularly oily fish (e.g., salmon, herring, sardines) is beneficial for cardiovascular health due to its high n-3 polyunsaturated fatty acid content. However, there is some concern that the <span class="hlt">mercury</span> content in fish may increase cardiovascular disease risk, but this relationship remains unclear. The PREDIMED trial included 7477 participants who were at high risk for cardiovascular disease at baseline. In this study, we evaluated associations between <span class="hlt">mercury</span> exposure, fish consumption and cardiovascular disease. We randomly selected 147 of the 288 cases diagnosed with cardiovascular disease during follow-up and matched them on age and sex to 267 <span class="hlt">controls</span>. Instrumental neutron activation analysis was used to assess toenail <span class="hlt">mercury</span> concentration. In-person interviews, medical record reviews and validated questionnaires were used to assess fish consumption and other covariates. Information was collected at baseline and updated yearly during follow-up. We used conditional logistic regression to evaluate associations in the total nested case-<span class="hlt">control</span> study, and unconditional logistic regression for population subsets. Mean (±SD) toenail <span class="hlt">mercury</span> concentrations (μg per gram) did not significantly differ between cases (0.63 (±0.53)) and <span class="hlt">controls</span> (0.67 (±0.49)). <span class="hlt">Mercury</span> concentration was not associated with cardiovascular disease in any analysis, and neither was fish consumption or n-3 fatty acids. The fully-adjusted relative risks for the highest versus lowest quartile of <span class="hlt">mercury</span> concentration were 0.71 (95% Confidence Interval [CI], 0.34, 1.14; p trend = 0.37) for the nested case-<span class="hlt">control</span> study, 0.74 (95% CI, 0.32, 1.76; p trend = 0.43) within the Mediterranean diet intervention group, and 0.50 (95% CI, 0.13, 1.96; p trend = 0.41) within the <span class="hlt">control</span> arm of the trial. Associations remained null when <span class="hlt">mercury</span> was jointly assessed with fish consumption at baseline and during follow</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70029012','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70029012"><span>Wildfires threaten <span class="hlt">mercury</span> stocks in northern soils</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Turetsky, M.R.; Harden, J.W.; Friedli, H.R.; Flannigan, M.; Payne, N.; Crock, J.; Radke, L.</p> <p>2006-01-01</p> <p>With climate change rapidly affecting northern forests and wetlands, <span class="hlt">mercury</span> reserves once protected in cold, wet soils are being exposed to burning, likely triggering large releases of <span class="hlt">mercury</span> to the atmosphere. We quantify organic soil <span class="hlt">mercury</span> stocks and burn areas across western, boreal Canada for use in fire emission models that explore <span class="hlt">controls</span> of burn area, consumption severity, and fuel loading on atmospheric <span class="hlt">mercury</span> emissions. Though renowned as hotspots for the accumulation of <span class="hlt">mercury</span> and its transformation to the toxic methylmercury, boreal wetlands might soon transition to hotspots for atmospheric <span class="hlt">mercury</span> emissions. Estimates of circumboreal <span class="hlt">mercury</span> emissions from this study are 15-fold greater than estimates that do not account for <span class="hlt">mercury</span> stored in peat soils. Ongoing and projected increases in boreal wildfire activity due to climate change will increase atmospheric <span class="hlt">mercury</span> emissions, contributing to the anthropogenic alteration of the global <span class="hlt">mercury</span> cycle and exacerbating <span class="hlt">mercury</span> toxicities for northern food chains. Copyright 2006 by the American Geophysical Union.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MS%26E..160a2018Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MS%26E..160a2018Y"><span><span class="hlt">Task</span> Analysis Assessment on Intrastate Bus Traffic <span class="hlt">Controllers</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yen Bin, Teo; Azlis-Sani, Jalil; Nur Annuar Mohd Yunos, Muhammad; Ismail, S. M. Sabri S. M.; Tajedi, Noor Aqilah Ahmad</p> <p>2016-11-01</p> <p>Public transportation acts as social mobility and caters the daily needs of the society for passengers to travel from one place to another. This is true for a country like Malaysia where international trade has been growing significantly over the past few decades. <span class="hlt">Task</span> analysis assessment was conducted with the consideration of cognitive ergonomic view towards problem related to human factors. Conducting research regarding the <span class="hlt">task</span> analysis on bus traffic <span class="hlt">controllers</span> had allowed a better understanding regarding the nature of work and the overall monitoring activities of the bus services. This paper served to study the <span class="hlt">task</span> analysis assessment on intrastate bus traffic <span class="hlt">controllers</span> and the objectives of this study include to conduct <span class="hlt">task</span> analysis assessment on the bus traffic <span class="hlt">controllers</span>. <span class="hlt">Task</span> analysis assessment for the bus traffic <span class="hlt">controllers</span> was developed via Hierarchical <span class="hlt">Task</span> Analysis (HTA). There are a total of five subsidiary <span class="hlt">tasks</span> on level one and only two were able to be further broken down in level two. Development of HTA allowed a better understanding regarding the work and this could further ease the evaluation of the <span class="hlt">tasks</span> conducted by the bus traffic <span class="hlt">controllers</span>. Thus, human error could be reduced for the safety of all passengers and increase the overall efficiency of the system. Besides, it could assist in improving the operation of the bus traffic <span class="hlt">controllers</span> by modelling or synthesizing the existing <span class="hlt">tasks</span> if necessary.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=PIA00067&hterms=shakespeare&qs=N%3D0%26Ntk%3DTitle%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dshakespeare','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=PIA00067&hterms=shakespeare&qs=N%3D0%26Ntk%3DTitle%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dshakespeare"><span><span class="hlt">Mercury</span>: Photomosaic of the Shakespeare Quadrangle of <span class="hlt">Mercury</span> (Southern Half) H-3</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1974-01-01</p> <p>This computer generated photomosaic from Mariner 10 is of the southern half of <span class="hlt">Mercury</span>'s Shakespeare Quadrangle, named for the ancient Shakespeare crater located on the upper edge to the left of center. This portion of the quadrangle covers the geographic region from 20 to <span class="hlt">45</span> degrees north latitude and from 90 to 180 degrees longitude. The photomosaic was produced using computer techniques and software developed in the Image Processing Laboratory of NASA's Jet Propulsion Laboratory. The pictures have been high-pass filtered and contrast enhanced to accentuate surface detail, and geometrically transformed into a Lambert conformal projection.<p/>Well defined bright streaks or ray systems radiating away from craters constitute another distinctive feature of the Mercurian surface, remarkably similar to the Moon. The rays cut across and are superimposed on all other surface features, indicating that the source craters are the youngest topographic features on the surface of <span class="hlt">Mercury</span>.<p/>The above material was taken from the following publication... Davies, M. E., S. E. Dwornik, D. E. Gault, and R. G. Strom, Atlas of <span class="hlt">Mercury</span>,NASA SP-423 (1978).<p/>The Mariner 10 mission was managed by the Jet Propulsion Laboratory for NASA's Office of Space Science.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1407923','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1407923"><span>Speciation of <span class="hlt">mercury</span> in sludge solids: washed sludge</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Bannochie, C. J.; Lourie, A. P.</p> <p>2017-10-24</p> <p>The objective of this applied research <span class="hlt">task</span> was to study the type and concentration of <span class="hlt">mercury</span> compounds found within the contaminated Savannah River Site Liquid Waste System (SRS LWS). A method of selective sequential extraction (SSE), developed by Eurofins Frontier Global Sciences1,2 and adapted by SRNL, utilizes an extraction procedure divided into seven separate tests for different species of <span class="hlt">mercury</span>. In the SRNL’s modified procedure four of these tests were applied to a washed sample of high level radioactive waste sludge.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.springerlink.com/content/u880t387438h4n63/?p=1b68126dc2be4e77a78e23c0d2573c0f&pi=15','USGSPUBS'); return false;" href="http://www.springerlink.com/content/u880t387438h4n63/?p=1b68126dc2be4e77a78e23c0d2573c0f&pi=15"><span>Effects of low dietary levels of methyl <span class="hlt">mercury</span> on mallard reproduction</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, G.</p> <p>1974-01-01</p> <p>Mallard ducks were fed a <span class="hlt">control</span> diet or a diet containing 0.5 ppm or 3 ppm <span class="hlt">mercury</span> (as methylmercury dicyandiamide). Health of adults and reproductive success were studied. The dietary level of 3 ppm <span class="hlt">mercury</span> had harmful effects on reproduction, although it did not appear to affect the health of the adults during the 12 months of dosage. Ducks that were fed the diet containing 0.5 ppm <span class="hlt">mercury</span> reproduced as well as <span class="hlt">controls</span>, and ducklings from parents fed 0.5 ppm <span class="hlt">mercury</span> grew faster in the first week of life than did <span class="hlt">controls</span>....The greatest harm to reproduction associated with the diet containing 3 ppm <span class="hlt">mercury</span> was an increase in duckling mortality, but reduced egg laying and increased embryonic mortality also occurred....During the peak of egg laying, eggs laid by <span class="hlt">controls</span> tended to be heavier than eggs laid by ducks fed either level of <span class="hlt">mercury</span>; however, there seemed to be no eggshell thinning associated with <span class="hlt">mercury</span> treatment. Levels of <span class="hlt">mercury</span> reached about 1 ppm in eggs from ducks fed a dietary dosage of 0.5 ppm <span class="hlt">mercury</span> and between 6 and 9 ppm in the eggs from ducks fed 3 ppm <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=71893&Lab=NRMRL&keyword=Eco+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=71893&Lab=NRMRL&keyword=Eco+AND+technology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>PERFORMANCE AND COST OF <span class="hlt">MERCURY</span> AND MULTIPOLLUTANT EMISSION <span class="hlt">CONTROL</span> TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The report presents estimates of the performance and cost of both powdered activated carbon (PAC) and multipollutant <span class="hlt">control</span> technologies that may be useful in <span class="hlt">controlling</span> <span class="hlt">mercury</span> emissions. Based on currently available data, cost estimates for PAC injection range are 0.03-3.096 ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27670112','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27670112"><span>Microbial <span class="hlt">mercury</span> methylation in Antarctic sea ice.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gionfriddo, Caitlin M; Tate, Michael T; Wick, Ryan R; Schultz, Mark B; Zemla, Adam; Thelen, Michael P; Schofield, Robyn; Krabbenhoft, David P; Holt, Kathryn E; Moreau, John W</p> <p>2016-08-01</p> <p>Atmospheric deposition of <span class="hlt">mercury</span> onto sea ice and circumpolar sea water provides <span class="hlt">mercury</span> for microbial methylation, and contributes to the bioaccumulation of the potent neurotoxin methylmercury in the marine food web. Little is known about the abiotic and biotic <span class="hlt">controls</span> on microbial <span class="hlt">mercury</span> methylation in polar marine systems. However, <span class="hlt">mercury</span> methylation is known to occur alongside photochemical and microbial <span class="hlt">mercury</span> reduction and subsequent volatilization. Here, we combine <span class="hlt">mercury</span> speciation measurements of total and methylated <span class="hlt">mercury</span> with metagenomic analysis of whole-community microbial DNA from Antarctic snow, brine, sea ice and sea water to elucidate potential microbially mediated <span class="hlt">mercury</span> methylation and volatilization pathways in polar marine environments. Our results identify the marine microaerophilic bacterium Nitrospina as a potential <span class="hlt">mercury</span> methylator within sea ice. Anaerobic bacteria known to methylate <span class="hlt">mercury</span> were notably absent from sea-ice metagenomes. We propose that Antarctic sea ice can harbour a microbial source of methylmercury in the Southern Ocean.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28366955','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28366955"><span>Signs and symptoms of <span class="hlt">mercury</span>-exposed gold miners.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bose-O'Reilly, Stephan; Bernaudat, Ludovic; Siebert, Uwe; Roider, Gabriele; Nowak, Dennis; Drasch, Gustav</p> <p>2017-03-30</p> <p>Gold miners use <span class="hlt">mercury</span> to extract gold from ore adding liquid <span class="hlt">mercury</span> to the milled gold-containing ore. This results in a <span class="hlt">mercury</span>-gold compound, called amalgam. Miners smelt this amalgam to obtain gold, vaporizing it and finally inhaling the toxic <span class="hlt">mercury</span> fumes. The objective was to merge and analyze data from different projects, to identify typical signs and symptoms of chronic inorganic <span class="hlt">mercury</span> exposure. Miners and community members from various artisanal small-scale gold mining areas had been examined (Philippines, Mongolia, Tanzania, Zimbabwe, Indonesia). Data of several health assessments were pooled. Urine, blood and hair samples were analyzed for <span class="hlt">mercury</span> (N = 1252). Questionnaires, standardized medical examinations and neuropsychological tests were used. Participants were grouped into: <span class="hlt">Controls</span> (N = 209), living in an exposed area (N = 408), working with <span class="hlt">mercury</span> as panners (N = 181), working with <span class="hlt">mercury</span> as amalgam burners (N = 454). Chi<sup>2</sup> test, linear trend test, Mann-Whitney test, Kruskal-Wallis test, correlation coefficient, Spearman's rho, and analysis of variance tests were used. An algorithm was used to define participants with chronic <span class="hlt">mercury</span> intoxication. Mean <span class="hlt">mercury</span> concentrations in all exposed subgroups were elevated and above threshold limits, with amalgam burners showing highest levels. Typical symptoms of chronic metallic <span class="hlt">mercury</span> intoxication were tremor, ataxia, coordination problems, excessive salivation and metallic taste. Participants from the exposed groups showed poorer results in different neuropsychological tests in comparison to the <span class="hlt">control</span> group. Fifty-four percent of the high-exposed group (amalgam burners) were diagnosed as being <span class="hlt">mercury</span>-intoxicated, compared to 0% within the <span class="hlt">control</span> group (Chi<sup>2</sup> p < 0.001). Chronic <span class="hlt">mercury</span> intoxication, with tremor, ataxia and other neurological symptoms together with a raised body burden of <span class="hlt">mercury</span> was clinically diagnosed in exposed people in artisanal small-scale mining</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5295325','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5295325"><span><span class="hlt">Mercury</span> Exposure and Heart Diseases</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Genchi, Giuseppe; Sinicropi, Maria Stefania; Carocci, Alessia; Lauria, Graziantonio; Catalano, Alessia</p> <p>2017-01-01</p> <p>Environmental contamination has exposed humans to various metal agents, including <span class="hlt">mercury</span>. It has been determined that <span class="hlt">mercury</span> is not only harmful to the health of vulnerable populations such as pregnant women and children, but is also toxic to ordinary adults in various ways. For many years, <span class="hlt">mercury</span> was used in a wide variety of human activities. Nowadays, the exposure to this metal from both natural and artificial sources is significantly increasing. Recent studies suggest that chronic exposure, even to low concentration levels of <span class="hlt">mercury</span>, can cause cardiovascular, reproductive, and developmental toxicity, neurotoxicity, nephrotoxicity, immunotoxicity, and carcinogenicity. Possible biological effects of <span class="hlt">mercury</span>, including the relationship between <span class="hlt">mercury</span> toxicity and diseases of the cardiovascular system, such as hypertension, coronary heart disease, and myocardial infarction, are being studied. As heart rhythm and function are under autonomic nervous system <span class="hlt">control</span>, it has been hypothesized that the neurotoxic effects of <span class="hlt">mercury</span> might also impact cardiac autonomic function. <span class="hlt">Mercury</span> exposure could have a long-lasting effect on cardiac parasympathetic activity and some evidence has shown that <span class="hlt">mercury</span> exposure might affect heart rate variability, particularly early exposures in children. The mechanism by which <span class="hlt">mercury</span> produces toxic effects on the cardiovascular system is not fully elucidated, but this mechanism is believed to involve an increase in oxidative stress. The exposure to <span class="hlt">mercury</span> increases the production of free radicals, potentially because of the role of <span class="hlt">mercury</span> in the Fenton reaction and a reduction in the activity of antioxidant enzymes, such as glutathione peroxidase. In this review we report an overview on the toxicity of <span class="hlt">mercury</span> and focus our attention on the toxic effects on the cardiovascular system. PMID:28085104</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28085104','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28085104"><span><span class="hlt">Mercury</span> Exposure and Heart Diseases.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Genchi, Giuseppe; Sinicropi, Maria Stefania; Carocci, Alessia; Lauria, Graziantonio; Catalano, Alessia</p> <p>2017-01-12</p> <p>Environmental contamination has exposed humans to various metal agents, including <span class="hlt">mercury</span>. It has been determined that <span class="hlt">mercury</span> is not only harmful to the health of vulnerable populations such as pregnant women and children, but is also toxic to ordinary adults in various ways. For many years, <span class="hlt">mercury</span> was used in a wide variety of human activities. Nowadays, the exposure to this metal from both natural and artificial sources is significantly increasing. Recent studies suggest that chronic exposure, even to low concentration levels of <span class="hlt">mercury</span>, can cause cardiovascular, reproductive, and developmental toxicity, neurotoxicity, nephrotoxicity, immunotoxicity, and carcinogenicity. Possible biological effects of <span class="hlt">mercury</span>, including the relationship between <span class="hlt">mercury</span> toxicity and diseases of the cardiovascular system, such as hypertension, coronary heart disease, and myocardial infarction, are being studied. As heart rhythm and function are under autonomic nervous system <span class="hlt">control</span>, it has been hypothesized that the neurotoxic effects of <span class="hlt">mercury</span> might also impact cardiac autonomic function. <span class="hlt">Mercury</span> exposure could have a long-lasting effect on cardiac parasympathetic activity and some evidence has shown that <span class="hlt">mercury</span> exposure might affect heart rate variability, particularly early exposures in children. The mechanism by which <span class="hlt">mercury</span> produces toxic effects on the cardiovascular system is not fully elucidated, but this mechanism is believed to involve an increase in oxidative stress. The exposure to <span class="hlt">mercury</span> increases the production of free radicals, potentially because of the role of <span class="hlt">mercury</span> in the Fenton reaction and a reduction in the activity of antioxidant enzymes, such as glutathione peroxidase. In this review we report an overview on the toxicity of <span class="hlt">mercury</span> and focus our attention on the toxic effects on the cardiovascular system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26461264','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26461264"><span>Aerobic <span class="hlt">Mercury</span>-resistant bacteria alter <span class="hlt">Mercury</span> speciation and retention in the Tagus Estuary (Portugal).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Figueiredo, Neusa L; Canário, João; O'Driscoll, Nelson J; Duarte, Aida; Carvalho, Cristina</p> <p>2016-02-01</p> <p>Aerobic <span class="hlt">mercury</span>-resistant bacteria were isolated from the sediments of two highly <span class="hlt">mercury</span>-polluted areas of the Tagus Estuary (Barreiro and Cala do Norte) and one natural reserve area (Alcochete) in order to test their capacity to transform <span class="hlt">mercury</span>. Bacterial species were identified using 16S rRNA amplification and sequencing techniques and the results indicate the prevalence of Bacillus sp. Resistance patterns to <span class="hlt">mercurial</span> compounds were established by the determination of minimal inhibitory concentrations. Representative Hg-resistant bacteria were further tested for transformation pathways (reduction, volatilization and methylation) in cultures containing <span class="hlt">mercury</span> chloride. Bacterial Hg-methylation was carried out by Vibrio fluvialis, Bacillus megaterium and Serratia marcescens that transformed 2-8% of total <span class="hlt">mercury</span> into methylmercury in 48h. In addition, most of the HgR bacterial isolates showed Hg(2+)-reduction andHg(0)-volatilization resulting 6-50% <span class="hlt">mercury</span> loss from the culture media. In summary, the results obtained under <span class="hlt">controlled</span> laboratory conditions indicate that aerobic Hg-resistant bacteria from the Tagus Estuary significantly affect both the methylation and reduction of <span class="hlt">mercury</span> and may have a dual face by providing a pathway for pollution dispersion while forming methylmercury, which is highly toxic for living organisms. Copyright © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.eia.gov/analysis/requests/archive/2005/mercury/','EIAPUBS'); return false;" href="https://www.eia.gov/analysis/requests/archive/2005/mercury/"><span>Analysis of Alternative <span class="hlt">Mercury</span> <span class="hlt">Control</span> Strategies</span></a></p> <p><a target="_blank" href="http://www.eia.doe.gov/reports/">EIA Publications</a></p> <p></p> <p>2005-01-01</p> <p>This analysis responds to a September 14, 2004, request from Chairmen James M. Inhofe and George V. Voinovich asking the Energy Information Administration (EIA) to analyze the impacts of different approaches for removing <span class="hlt">mercury</span> from coal-fired power plants.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title10-vol2/pdf/CFR-2010-title10-vol2-sec74-45.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title10-vol2/pdf/CFR-2010-title10-vol2-sec74-45.pdf"><span>10 CFR 74.<span class="hlt">45</span> - Measurements and measurement <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-01-01</p> <p>... 10 Energy 2 2010-01-01 2010-01-01 false Measurements and measurement <span class="hlt">control</span>. 74.<span class="hlt">45</span> Section 74.<span class="hlt">45</span> Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) MATERIAL <span class="hlt">CONTROL</span> AND ACCOUNTING OF SPECIAL NUCLEAR MATERIAL Special Nuclear Material of Moderate Strategic Significance § 74.<span class="hlt">45</span> Measurements and measurement...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/mercury.html','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/mercury.html"><span><span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p><span class="hlt">Mercury</span> is an element that is found in air, water and soil. It has several forms. Metallic <span class="hlt">mercury</span> is a shiny, silver-white, odorless liquid. If ... with other elements to form powders or crystals. <span class="hlt">Mercury</span> is in many products. Metallic <span class="hlt">mercury</span> is used ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27619374','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27619374"><span><span class="hlt">Mercury</span> accumulation in marine fish most favoured by Malaysian women, the predictors and the potential health risk.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jeevanaraj, Pravina; Hashim, Zailina; Elias, Saliza Mohd; Aris, Ahmad Zaharin</p> <p>2016-12-01</p> <p>We identified marine fish species most preferred by women at reproductive age in Selangor, Malaysia, <span class="hlt">mercury</span> concentrations in the fish muscles, factors predicting <span class="hlt">mercury</span> accumulation and the potential health risk. Nineteen most preferred marine fish species were purchased (n = 175) from selected fisherman's and wholesale market. Length, weight, habitat, feeding habit and trophic level were recognised. Edible muscles were filleted, dried at 80 °C, ground on an agate mortar and digested in Multiwave 3000 using HNO 3 and H 2 O 2 . Total <span class="hlt">mercury</span> was quantified using VP90 cold vapour system with N 2 carrier gas. Certified reference material DORM-4 was used to validate the results. Fish species were classified as demersal (7) and pelagic (12) or predators (11), zoo benthos (6) and planktivorous (2). Length, weight and trophic level ranged from 10.5 to 75.0 cm, 0.01 to 2.50 kg and 2.5 to <span class="hlt">4.5</span>, respectively. Geometric mean of total <span class="hlt">mercury</span> ranged from 0.21 to 0.50 mg/kg; maximum in golden snapper (0.90 mg/kg). Only 9 % of the samples exceeded the JECFA recommendation. Multiple linear regression found demersal, high trophic (≥4.0) and heavier fishes to accumulate more <span class="hlt">mercury</span> in muscles (R 2 = 27.3 %), <span class="hlt">controlling</span> for all other factors. About 47 % of the fish samples contributed to <span class="hlt">mercury</span> intake above the provisional tolerable level (<span class="hlt">45</span> μg/day). While only a small portion exceeded the JECFA fish Hg guideline, the concentration reported may be alarming for heavy consumers. Attention should be given in risk management to avoid demersal and high trophic fish, predominantly heavier ones.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63475&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63475&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>PERFORMANCE AND COST OF <span class="hlt">MERCURY</span> EMISSION <span class="hlt">CONTROL</span> TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The report presents estimates of the performance and cost of powdered activated carbon (PAC) injection-based <span class="hlt">mercury</span> <span class="hlt">control</span> technologies and projections of costs for future applications. (NOTE: Under the Clean Air Act Amendments of 1990, the U.S. EPA has to determine whether mer...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70042769','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70042769"><span><span class="hlt">Mercury</span> exposure may suppress baseline corticosterone levels in juvenile birds</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Herring, Garth; Ackerman, Joshua T.; Herzog, Mark P.</p> <p>2012-01-01</p> <p><span class="hlt">Mercury</span> exposure has been associated with a wide variety of negative reproductive responses in birds, however few studies have examined the potential for chick impairment via the hypothalamic-pituitary-adrenal (HPA) axis. The HPA axis regulates corticosterone levels during periods of stress. We examined the relationship between baseline fecal corticosterone metabolite concentrations and <span class="hlt">mercury</span> concentrations in down feathers of recently hatched (Sterna forsteri) chicks in San Francisco Bay, California. Baseline fecal corticosterone metabolite concentrations were negatively correlated with <span class="hlt">mercury</span> concentrations in blood of older chicks (decreasing by 81% across the range of observed <span class="hlt">mercury</span> concentrations) while accounting for positive correlations between corticosterone concentrations and number of fledgling chicks within the colony and chick age. In recently hatched chicks, baseline fecal corticosterone metabolite concentrations were weakly negatively correlated with <span class="hlt">mercury</span> concentrations in down feathers (decreasing by <span class="hlt">45</span>% across the range of observed <span class="hlt">mercury</span> concentrations) while accounting for stronger positive correlations between corticosterone concentrations and colony nest abundance and date. These results indicate that chronic <span class="hlt">mercury</span> exposure may suppress baseline corticosterone concentrations in tern chicks and suggests that a juvenile bird's ability to respond to stress may be reduced via the downregulation of the HPA axis.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23128585','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23128585"><span>Conflict-specific effects of accessory stimuli on cognitive <span class="hlt">control</span> in the Stroop <span class="hlt">task</span> and the Simon <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Soutschek, Alexander; Müller, Hermann J; Schubert, Torsten</p> <p>2013-01-01</p> <p>Both the Stroop and the Simon paradigms are often used in research on cognitive <span class="hlt">control</span>, however, there is evidence that dissociable <span class="hlt">control</span> processes are involved in these <span class="hlt">tasks</span>: While conflicts in the Stroop <span class="hlt">task</span> may be resolved mainly by enhanced <span class="hlt">task</span>-relevant stimulus processing, conflicts in the Simon <span class="hlt">task</span> may be resolved rather by suppressing the influence of <span class="hlt">task</span>-irrelevant information on response selection. In the present study, we show that these <span class="hlt">control</span> mechanisms interact in different ways with the presentation of accessory stimuli. Accessory stimuli do not affect cognitive <span class="hlt">control</span> in the Simon <span class="hlt">task</span>, but they impair the efficiency of cross-trial <span class="hlt">control</span> processes in the Stroop <span class="hlt">task</span>. Our findings underline the importance of differentiating between different types of conflicts and mechanisms of cognitive <span class="hlt">control</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17544578','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17544578"><span>Adsorbents for capturing <span class="hlt">mercury</span> in coal-fired boiler flue gas.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yang, Hongqun; Xu, Zhenghe; Fan, Maohong; Bland, Alan E; Judkins, Roddie R</p> <p>2007-07-19</p> <p>This paper reviews recent advances in the research and development of sorbents used to capture <span class="hlt">mercury</span> from coal-fired utility boiler flue gas. <span class="hlt">Mercury</span> emissions are the source of serious health concerns. Worldwide <span class="hlt">mercury</span> emissions from human activities are estimated to be 1000 to 6000 t/annum. <span class="hlt">Mercury</span> emissions from coal-fired power plants are believed to be the largest source of anthropogenic <span class="hlt">mercury</span> emissions. <span class="hlt">Mercury</span> emissions from coal-fired utility boilers vary in total amount and speciation, depending on coal types, boiler operating conditions, and configurations of air pollution <span class="hlt">control</span> devices (APCDs). The APCDs, such as fabric filter (FF) bag house, electrostatic precipitator (ESP), and wet flue gas desulfurization (FGD), can remove some particulate-bound and oxidized forms of <span class="hlt">mercury</span>. Elemental <span class="hlt">mercury</span> often escapes from these devices. Activated carbon injection upstream of a particulate <span class="hlt">control</span> device has been shown to have the best potential to remove both elemental and oxidized <span class="hlt">mercury</span> from the flue gas. For this paper, NORIT FGD activated carbon was extensively studied for its <span class="hlt">mercury</span> adsorption behavior. Results from bench-, pilot- and field-scale studies, <span class="hlt">mercury</span> adsorption by coal chars, and a case of lignite-burned <span class="hlt">mercury</span> <span class="hlt">control</span> were reviewed. Studies of brominated carbon, sulfur-impregnated carbon and chloride-impregnated carbon were also reviewed. Carbon substitutes, such as calcium sorbents, petroleum coke, zeolites and fly ash were analyzed for their <span class="hlt">mercury</span>-adsorption performance. At this time, brominated activated carbon appears to be the best-performing <span class="hlt">mercury</span> sorbent. A non-injection regenerable sorbent technology is briefly introduced herein, and the issue of <span class="hlt">mercury</span> leachability is briefly covered. Future research directions are suggested.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.B11B0405F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.B11B0405F"><span>Size Distribution and First Flush Effects of <span class="hlt">Mercury</span> Containing Particles in Highway Runoff Water</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ferguson, K.; Green, P.</p> <p>2007-12-01</p> <p>Human and environmental health concerns have recently prompted many California water quality <span class="hlt">control</span> boards to lower the Total Maximum Daily Loads (TMDL) of <span class="hlt">Mercury</span> into their water systems. A size distribution study of <span class="hlt">mercury</span> containing particles was conducted in order to begin to understand the possible sources of the contamination in highway storm water runoff. Four storms were studied from a monitoring site in the Los Angeles area near the crossing of highways 605 and 91. Storm water ran through an extended detention basin made of earthen material with a maximum water depth of 1.17m. Grab samples were collected manually starting at the beginning of the runoff, continuing at every fifteen minutes for the first hour, followed by a collection every hour after that for the duration of the storm. The particle sizes were separated into five size ranges (larger than 100um, 20-100um, 8-20um, 0.<span class="hlt">45</span>-8um, and 0-0.<span class="hlt">45</span>um) by sequential filtration. The samples were then acid digested for further analysis. Five standard <span class="hlt">Mercury</span> solutions ranging from 5 to 100 parts per trillion were prepared in nitric acid immediately before analysis. Samples were analyzed for both the Hg-199 and the Hg-202 isotopes using an Agilent 7500i Inductively Coupled Plasma Mass Spectrometer. Substantial sub-micron concentrations of <span class="hlt">mercury</span> were detected from all four storms, and in all five particle size ranges studied. The total amount of <span class="hlt">Mercury</span> detected from each of the storms ranged from 8.5 to 35.5 pptr. Bursts of rain correlate well with increases of influent Hg concentration. Although a First Flush effect can be seen in the first storm, it is not as strong and/or not shown at all in the remaining three. The detention basin used at the site was shown to be an efficient BMP, reducing the amount of Hg in the effluent runoff as much as 30 pptr and down to as little as 2 pptr. The majority of Hg was found in either the 8-20um or the 0-0.<span class="hlt">45</span>um particle size ranges. Mitigation of either portion will be</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3521925','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3521925"><span><span class="hlt">Mercury</span> Exposure among Garbage Workers in Southern Thailand</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2012-01-01</p> <p>Objectives 1) To determine <span class="hlt">mercury</span> levels in urine samples from garbage workers in Southern Thailand, and 2) to describe the association between work characteristics, work positions, behavioral factors, and acute symptoms; and levels of <span class="hlt">mercury</span> in urine samples. Methods A case-<span class="hlt">control</span> study was conducted by interviewing 60 workers in 5 hazardous-waste-management factories, and 60 matched non-exposed persons living in the same area of Southern Thailand. Urine samples were collected to determine <span class="hlt">mercury</span> levels by cold-vapor atomic absorption spectrometer <span class="hlt">mercury</span> analyzer. Results The hazardous-waste workers' urinary <span class="hlt">mercury</span> levels (10.07 µg/g creatinine) were significantly higher than the <span class="hlt">control</span> group (1.33 µg/g creatinine) (p < 0.001). Work position, duration of work, personal protective equipment (PPE), and personal hygiene, were significantly associated with urinary <span class="hlt">mercury</span> level (p < 0.001). The workers developed acute symptoms - of headaches, nausea, chest tightness, fatigue, and loss of consciousness at least once a week - and those who developed symptoms had significantly higher urinary <span class="hlt">mercury</span> levels than those who did not, at p < 0.05. A multiple regression model was constructed. Significant predictors of urinary <span class="hlt">mercury</span> levels included hours worked per day, days worked per week, duration of work (years), work position, use of PPE (mask, trousers, and gloves), and personal hygiene behavior (ate snacks or drank water at work, washed hands before lunch, and washed hands after work). Conclusion Changing garbage workers' hygiene habits can reduce urinary <span class="hlt">mercury</span> levels. Personal hygiene is important, and should be stressed in education programs. Employers should institute engineering <span class="hlt">controls</span> to reduce urinary <span class="hlt">mercury</span> levels among garbage workers. PMID:23251842</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21783227','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21783227"><span><span class="hlt">Mercury</span> regulation, fate, transport, transformation, and abatement within cement manufacturing facilities: review.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sikkema, Joel K; Alleman, James E; Ong, Say Kee; Wheelock, Thomas D</p> <p>2011-09-15</p> <p>The USEPA's 2010 <span class="hlt">mercury</span> rule, which would reduce emissions from non-hazardous waste burning cement manufacturing facilities by an estimated 94%, represents a substantial regulatory challenge for the industry. These regulations, based on the performance of facilities that benefit from low concentrations of <span class="hlt">mercury</span> in their feedstock and fuel inputs (e.g., limestone concentration was less than 25 ppb at each facility), will require non-compliant facilities to develop innovative <span class="hlt">controls</span>. <span class="hlt">Control</span> development is difficult because each facility's emissions must be assessed and simple correlation to <span class="hlt">mercury</span> concentrations in limestone or an assumption of 'typically observed' <span class="hlt">mercury</span> concentrations in inputs are unsupported by available data. Furthermore, atmospheric emissions are highly variable due to an internal <span class="hlt">control</span> mechanism that captures and loops <span class="hlt">mercury</span> between the high-temperature kiln and low-temperature raw materials mill. Two models have been reported to predict emissions; however, they have not been benchmarked against data from the internal components that capture <span class="hlt">mercury</span> and do not distinguish between <span class="hlt">mercury</span> species, which have different sorption and desorption properties. <span class="hlt">Control</span> strategies include technologies applied from other industries and technologies developed specifically for cement facilities. Reported technologies, listed from highest to lowest anticipated <span class="hlt">mercury</span> removal, include purge of collected dust or raw meal, changes in feedstocks and fuels, wet scrubbing, cleaning of <span class="hlt">mercury</span> enriched dust, dry sorbent injection, and dry and semi-dry scrubbing. The effectiveness of these technologies is limited by an inadequate understanding of sorption, desorption, and <span class="hlt">mercury</span> species involved in internal loop <span class="hlt">mercury</span> <span class="hlt">control</span>. To comply with the <span class="hlt">mercury</span> rule and to improve current <span class="hlt">mercury</span> <span class="hlt">control</span> technologies and practices, research is needed to advance fundamental knowledge regarding <span class="hlt">mercury</span> species sorption and desorption dynamics on materials</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.B11B0414B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.B11B0414B"><span>Isotopic Methods for Determining the Relative Importance of Bioavailability Versus Trophic Position in <span class="hlt">Controlling</span> <span class="hlt">Mercury</span> Concentrations in Everglades Mosquitofish</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bemis, B. E.; Kendall, C.</p> <p>2007-12-01</p> <p>The concentration of <span class="hlt">mercury</span> in fish tissues is widely used as an indicator of the magnitude of <span class="hlt">mercury</span> contamination in aquatic ecosystems. Eastern mosquitofish (Gambusia holbrookii) is an important sentinel species used for this purpose in the varied environments of the Florida Everglades, because mosquitofish are abundant, have a short lifespan, and migrate little. Like other freshwater fish, the primary route of <span class="hlt">mercury</span> uptake into mosquitofish tissues is through diet as bioavailable methylmercury. Yet, it is unclear whether variations in mosquitofish <span class="hlt">mercury</span> observed across the Everglades are due primarily to differences in bioaccumulation (i.e., trophic position) or abundance of methylmercury available to the food web base. We use isotopic methods to investigate the importance of these two <span class="hlt">controls</span> on mosquitofish <span class="hlt">mercury</span> at the landscape scale. As part of the USEPA REMAP project, mosquitofish and periphyton were collected during September 1996 from over one hundred sites throughout the Everglades and analyzed for <span class="hlt">mercury</span> concentration. The USGS analyzed splits of the samples for nitrogen (d15N), carbon (d13C), and sulfur (d34S) isotopic composition, to investigate the causes of <span class="hlt">mercury</span> variations. The d15N value of tissues is often used to estimate the relative trophic positions of organisms in a food web, and should correlate positively with tissue <span class="hlt">mercury</span> if bioaccumulation is an important <span class="hlt">control</span> on mosquitofish <span class="hlt">mercury</span> concentration. The d13C value can be useful for detecting differences in food web base (e.g., algal versus detrital), and thus the entry point of contaminants. Tissue d34S potentially indicates the extent of dissimilatory sulfate reduction in sediments, a process used by sulfate-reducing bacteria (SRB) during conversion of inorganic Hg(II) to bioavailable methylmercury. Because this process increases the d34S value of remaining sulfate, which enters the food web base, mosquitofish sulfur isotopes should show positive correlations with SRB</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29272276','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29272276"><span>The performance of stroke survivors in turning-while-walking while carrying out a concurrent cognitive <span class="hlt">task</span> compared with <span class="hlt">controls</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chan, Wing-Nga; Tsang, William Wai-Nam</p> <p>2017-01-01</p> <p>Turning-while-walking is one of the commonest causes of falls in stroke survivors. It involves cognitive processing and may be challenging when performed concurrently with a cognitive <span class="hlt">task</span>. Previous studies of dual-<span class="hlt">tasking</span> involving turning-while-walking in stroke survivors show that the performance of physical <span class="hlt">tasks</span> is compromised. However, the design of those studies did not address the response of stroke survivors under dual-<span class="hlt">tasking</span> condition without specifying the <span class="hlt">task</span>-preference and its effect on the performance of the cognitive <span class="hlt">task</span>. First, to compare the performance of single-<span class="hlt">tasking</span> and dual-<span class="hlt">tasking</span> in stroke survivors. Second, to compare the performance of stroke survivors with non-stroke <span class="hlt">controls</span>. Fifty-nine stroke survivors and <span class="hlt">45</span> <span class="hlt">controls</span> were assessed with an auditory Stroop test, a turning-while-walking test, and a combination of the two single <span class="hlt">tasks</span>. The outcome of the cognitive <span class="hlt">task</span> was measured by the reaction time and accuracy of the <span class="hlt">task</span>. The physical <span class="hlt">task</span> was evaluated by measuring the turning duration, number of steps to turn, and time to complete the turning-while-walking test. Stroke survivors showed a significantly reduced accuracy in the auditory Stroop test when dual-<span class="hlt">tasking</span>, but there was no change in the reaction time. Their performance in the turning-while-walking <span class="hlt">task</span> was similar under both single-<span class="hlt">tasking</span> and dual-<span class="hlt">tasking</span> condition. Additionally, stroke survivors demonstrated a significantly longer reaction time and lower accuracy than the <span class="hlt">controls</span> both when single-<span class="hlt">tasking</span> and dual-<span class="hlt">tasking</span>. They took longer to turn, with more steps, and needed more time to complete the turning-while-walking <span class="hlt">task</span> in both <span class="hlt">tasking</span> conditions. The results show that stroke survivors with high mobility function performed the auditory Stroop test less accurately while preserving simultaneous turning-while-walking performance. They also demonstrated poorer performance in both single-<span class="hlt">tasking</span> and dual-<span class="hlt">tasking</span> as compared with <span class="hlt">controls</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=115137&Lab=NRMRL&keyword=fundamentals+AND+management&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=115137&Lab=NRMRL&keyword=fundamentals+AND+management&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>FUNDAMENTALS OF <span class="hlt">MERCURY</span> SPECIATION AND <span class="hlt">CONTROL</span> IN COAL-FIRED BOILERS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The report describes the progress of an experimental investigation of the speciation of <span class="hlt">mercury</span> in simulated coal combustion flue gasses. The effects of flue gas parameters and coal fly ash on the oxidation of elemental <span class="hlt">mercury</span> (Hgo) in the presence of hydrogen chloride (HCl) in ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006PhDT........78A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006PhDT........78A"><span>Fate and aqueous transport of <span class="hlt">mercury</span> in light of the Clean Air <span class="hlt">Mercury</span> Rule for coal-fired electric power plants</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Arzuman, Anry</p> <p></p> <p><span class="hlt">Mercury</span> is a hazardous air pollutant emitted to the atmosphere in large amounts. <span class="hlt">Mercury</span> emissions from electric power generation sources were estimated to be 48 metric tons/year, constituting the single largest anthropogenic source of <span class="hlt">mercury</span> in the U.S. Settled <span class="hlt">mercury</span> species are highly toxic contaminants of the environment. The newly issued Federal Clean Air <span class="hlt">Mercury</span> Rule requires that the electric power plants firing coal meet the new Maximum Achievable <span class="hlt">Mercury</span> <span class="hlt">Control</span> Technology limit by 2018. This signifies that all of the air-phase <span class="hlt">mercury</span> will be concentrated in solid phase which, based on the current state of the Air Pollution <span class="hlt">Control</span> Technology, will be fly ash. Fly ash is utilized by different industries including construction industry in concrete, its products, road bases, structural fills, monifills, for solidification, stabilization, etc. Since the increase in coal combustion in the U.S. (1.6 percent/year) is much higher than the fly ash demand, large amounts of fly ash containing <span class="hlt">mercury</span> and other trace elements are expected to accumulate in the next decades. The amount of <span class="hlt">mercury</span> transferred from one phase to another is not a linear function of coal combustion or ash production, depends on the future states of technology, and is unknown. The amount of aqueous <span class="hlt">mercury</span> as a function of the future removal, <span class="hlt">mercury</span> speciation, and coal and aquifer characteristics is also unknown. This paper makes a first attempt to relate <span class="hlt">mercury</span> concentrations in coal, flue gas, fly ash, and fly ash leachate using a single algorithm. <span class="hlt">Mercury</span> concentrations in all phases were examined and phase transformation algorithms were derived in a form suitable for probabilistic analyses. Such important parameters used in the transformation algorithms as Soil Cation Exchange Capacity for <span class="hlt">mercury</span>, soil <span class="hlt">mercury</span> selectivity sequence, <span class="hlt">mercury</span> activity coefficient, <span class="hlt">mercury</span> retardation factor, <span class="hlt">mercury</span> species soil adsorption ratio, and <span class="hlt">mercury</span> Freundlich soil adsorption isotherm</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=150524','PESTICIDES'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=150524"><span>TELEPHONIC PRESENTATION: <span class="hlt">MERCURY</span> ...</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>While traditional methods for determining <span class="hlt">mercury</span> in solid samples involve the use of aggressive chemicals to dissolve the matrix and the use of other chemicals to properly reduce the <span class="hlt">mercury</span> to the volatile elemental form, pyrolysis-based analyzers can be used by directly weighing the solid in a sampling boat and initiating the instrumental analysis for total <span class="hlt">mercury</span>. The research focused on in the subtasks is the development and application of state-of the-art technologies to meet the needs of the public, Office of Water, and ORD in the area of Water Quality. Located In the subtasks are the various research projects being performed in support of this <span class="hlt">Task</span> and more in-depth coverage of each project. Briefly, each project's objective is stated below.Subtask 1: To integrate state-of-the-art technologies (polar organic chemical integrative samplers, advanced solid-phase extraction methodologies with liquid chromatography/electrospray/mass spectrometry) and apply them to studying the sources and fate of a select list of PPCPs. Application and improvement of analytical methodologies that can detect non-volatile, polar, water-soluble pharmaceuticals in source waters at levels that could be environmentally significant (at concentrations less than parts per billion, ppb). IAG with USGS ends in FY05. APM 20 due in FY05.Subtask 2: Coordination of interagency research and public outreach activities for PPCPs. Participate on NSTC Health and Environment subcommittee wo</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/21130759-glutathione-level-after-long-term-occupational-elemental-mercury-exposure','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/21130759-glutathione-level-after-long-term-occupational-elemental-mercury-exposure"><span>Glutathione level after long-term occupational elemental <span class="hlt">mercury</span> exposure</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Kobal, Alfred Bogomir; Prezelj, Marija; Horvat, Milena</p> <p>2008-05-15</p> <p>Many in vitro and in vivo studies have elucidated the interaction of inorganic <span class="hlt">mercury</span> (Hg) and glutathione. However, human studies are limited. In this study, we investigated the potential effects of remote long-term intermittent occupational elemental Hg vapour (Hg{sup o}) exposure on erythrocyte glutathione levels and some antioxidative enzyme activities in ex-<span class="hlt">mercury</span> miners in the period after exposure. The study included 49 ex-<span class="hlt">mercury</span> miners divided into subgroups of 28 still active, Hg{sup o}-not-exposed miners and 21 elderly retired miners, and 41 <span class="hlt">controls</span>, age-matched to the miners subgroup. The <span class="hlt">control</span> workers were taken from '<span class="hlt">mercury</span>-free works'. Reduced glutathione (GSH) and oxidizedmore » disulphide glutathione (GSSG) concentrations in haemolysed erythrocytes were determined by capillary electrophoresis, while total glutathione (total GSH) and the GSH/GSSG ratio were calculated from the determined values. Catalase (CAT), glutathione peroxidase (GPx), and glutathione reductase (GR) activities in erythrocytes were measured using commercially available reagent kits, while urine Hg (U-Hg) concentrations were determined by cold vapour atomic absorption (CVAAS). No correlation of present U-Hg levels, GSH, GSSG, and antioxidative enzymes with remote occupational biological exposure indices were found. The mean CAT activity in miners and retired miners was significantly higher (p<0.05) than in the <span class="hlt">controls</span>. No differences in mean GPx activity among the three groups were found, whereas the mean GR activity was significantly higher (p<0.05) in miners than in retired miners. The mean concentrations of GSH (mmol/g Hb) in miners (13.03{+-}3.71) were significantly higher (p<0.05) than in the <span class="hlt">control</span> group (11.68{+-}2.66). No differences in mean total GSH, GSSG levels, and GSH/GSSG ratio between miners and <span class="hlt">controls</span> were found. A positive correlation between GSSG and present U-Hg excretion (r=0.41, p=0.001) in the whole group of ex-<span class="hlt">mercury</span> miners was observed. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15681174','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15681174"><span>Characterization and recovery of <span class="hlt">mercury</span> from spent fluorescent lamps.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jang, Min; Hong, Seung Mo; Park, Jae K</p> <p>2005-01-01</p> <p>Fluorescent lamps rely on <span class="hlt">mercury</span> as the source of ultraviolet radiation for the production of visible light. Partitioning of <span class="hlt">mercury</span> among vapor phase, loose phosphor powders produced during breaking and washing steps, glass matrices, phosphor powders attached on the glass and aluminum end caps was examined from simulated laboratory lamp recycling tests for different types of spent and new fluorescent lamps. <span class="hlt">Mercury</span> concentrations in lamp glasses taken from commercial lamp recyclers were also analyzed for comparison with the simulated results of spent and new lamps of different types. The <span class="hlt">mercury</span> content of the glass from spent lamps was highly variable depending on the lamp type and manufacturer; the median values of the <span class="hlt">mercury</span> concentration in glasses for spent 26- (T8) and 38-mm (T12) diameter fluorescent lamps were approximately 30 and <span class="hlt">45</span> microg/g, respectively. The average <span class="hlt">mercury</span> concentration of samples taken from recycler A was 29.6 microg/g, which was about 64% of median value measured from the spent T12 lamps. Over 94% of total <span class="hlt">mercury</span> in lamps remained either as a component of phosphor powders attached inside the lamp or in glass matrices. New T12 lamps had a higher partitioning percentage of elemental <span class="hlt">mercury</span> in the vapor phase (0.17%) than spent T12 lamps (0.04%), while spent lamps had higher partitioning percentages of <span class="hlt">mercury</span> resided on end-caps and phosphor powders detached from the breaking and washing steps. The TCLP values of simulated all lamp-glasses and samples obtained from recyclers were higher than the limit of LDR standard (0.025 mg/L). After investigating acid treatment and high temperature treatment as <span class="hlt">mercury</span> reclamation techniques, it was found that heating provided the most effective <span class="hlt">mercury</span> capture. Although the initial <span class="hlt">mercury</span> concentrations of individual sample were different, the <span class="hlt">mercury</span> concentrations after 1 h exposure at 100 degrees C were below 4 mug/g for all samples (i.e., <1% remaining). Therefore, it is recommended that</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4939108','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4939108"><span>Self-<span class="hlt">Control</span> Assessments of Capuchin Monkeys With the Rotating Tray <span class="hlt">Task</span> and the Accumulation <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Beran, Michael J.; Perdue, Bonnie M.; Rossettie, Mattea S.; James, Brielle T.; Whitham, Will; Walker, Bradlyn; Futch, Sara E.; Parrish, Audrey E.</p> <p>2016-01-01</p> <p>Recent studies of delay of gratification in capuchin monkeys using a rotating tray (RT) <span class="hlt">task</span> have shown improved self-<span class="hlt">control</span> performance in these animals in comparison to the accumulation (AC) <span class="hlt">task</span>. In this study, we investigated whether this improvement resulted from the difference in methods between the rotating tray <span class="hlt">task</span> and previous tests, or whether it was the result of greater overall experience with delay of gratification <span class="hlt">tasks</span>. Experiment 1 produced similar performance levels by capuchins monkeys in the RT and AC <span class="hlt">tasks</span> when identical reward and temporal parameters were used. Experiment 2 demonstrated a similar result using reward amounts that were more similar to previous AC experiments with these monkeys. In Experiment 3, monkeys performed multiple versions of the AC <span class="hlt">task</span> with varied reward and temporal parameters. Their self-<span class="hlt">control</span> behavior was found to be dependent on the overall delay to reward consumption, rather than the overall reward amount ultimately consumed. These findings indicate that these capuchin monkeys’ self-<span class="hlt">control</span> capacities were more likely to have improved across studies because of the greater experience they had with delay of gratification <span class="hlt">tasks</span>. Experiment 4 and Experiment 5 tested new, <span class="hlt">task</span>-naïve monkeys on both <span class="hlt">tasks</span>, finding more limited evidence of self-<span class="hlt">control</span>, and no evidence that one <span class="hlt">task</span> was more beneficial than the other in promoting self-<span class="hlt">control</span>. The results of this study suggest that future testing of this kind should focus on temporal parameters and reward magnitude parameters to establish accurate measures of delay of gratification capacity and development in this species and perhaps others. PMID:27298233</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/575119-mercury-study-report-congress-volume-health-effects-mercury-mercury-compounds','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/575119-mercury-study-report-congress-volume-health-effects-mercury-mercury-compounds"><span><span class="hlt">Mercury</span> study report to Congress. Volume 5. Health effects of <span class="hlt">mercury</span> and <span class="hlt">mercury</span> compounds</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Hassett-Sipple, B.; Swartout, J.; Schoeny, R.</p> <p>1997-12-01</p> <p>This volume summarizes the available information on human health effects and animal data for hazard identification and dose-response assessment for three forms of <span class="hlt">mercury</span>: elemental <span class="hlt">mercury</span>, <span class="hlt">mercury</span> chloride (inorganic <span class="hlt">mercury</span>), and methylmercury (organic <span class="hlt">mercury</span>). Effects are summarized by endpoint. The risk assessment evaluates carcinogenicity, mutagenicity, developmental toxicity and general systemic toxicity of these chemical species of <span class="hlt">mercury</span>. Toxicokinetics (absorption, distribution, metabolism and excretion) are described for each of the three <span class="hlt">mercury</span> species. Reference doses are calculated for inorganic and methylmercury; a reference concentrations for inhaled elemental <span class="hlt">mercury</span> is provided. A quantitative analysis of factors contributing to variability and uncertainty inmore » the methylmercury RfD is provided in an appendix. Interactions and sensitive populations are described. the draft volume assesses ongoing research and research needs to reduce uncertainty surrounding adverse human health consequences of methylmercury exposure.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=proactive+AND+interference&pg=3&id=EJ896347','ERIC'); return false;" href="https://eric.ed.gov/?q=proactive+AND+interference&pg=3&id=EJ896347"><span><span class="hlt">Control</span> and Interference in <span class="hlt">Task</span> Switching--A Review</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kiesel, Andrea; Steinhauser, Marco; Wendt, Mike; Falkenstein, Michael; Jost, Kerstin; Philipp, Andrea M.; Koch, Iring</p> <p>2010-01-01</p> <p>The <span class="hlt">task</span>-switching paradigm offers enormous possibilities to study cognitive <span class="hlt">control</span> as well as <span class="hlt">task</span> interference. The current review provides an overview of recent research on both topics. First, we review different experimental approaches to <span class="hlt">task</span> switching, such as comparing mixed-<span class="hlt">task</span> blocks with single-<span class="hlt">task</span> blocks, predictable <span class="hlt">task</span>-switching…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5897648','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5897648"><span>Do detour <span class="hlt">tasks</span> provide accurate assays of inhibitory <span class="hlt">control</span>?</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Whiteside, Mark A.; Laker, Philippa R.; Beardsworth, Christine E.</p> <p>2018-01-01</p> <p>Transparent Cylinder and Barrier <span class="hlt">tasks</span> are used to purportedly assess inhibitory <span class="hlt">control</span> in a variety of animals. However, we suspect that performances on these detour <span class="hlt">tasks</span> are influenced by non-cognitive traits, which may result in inaccurate assays of inhibitory <span class="hlt">control</span>. We therefore reared pheasants under standardized conditions and presented each bird with two sets of similar <span class="hlt">tasks</span> commonly used to measure inhibitory <span class="hlt">control</span>. We recorded the number of times subjects incorrectly attempted to access a reward through transparent barriers, and their latencies to solve each <span class="hlt">task</span>. Such measures are commonly used to infer the differential expression of inhibitory <span class="hlt">control</span>. We found little evidence that their performances were consistent across the two different Putative Inhibitory <span class="hlt">Control</span> <span class="hlt">Tasks</span> (PICTs). Improvements in performance across trials showed that pheasants learned the affordances of each specific <span class="hlt">task</span>. Critically, prior experience of transparent <span class="hlt">tasks</span>, either Barrier or Cylinder, also improved subsequent inhibitory <span class="hlt">control</span> performance on a novel <span class="hlt">task</span>, suggesting that they also learned the general properties of transparent obstacles. Individual measures of persistence, assayed in a third <span class="hlt">task</span>, were positively related to their frequency of incorrect attempts to solve the transparent inhibitory <span class="hlt">control</span> <span class="hlt">tasks</span>. Neophobia, Sex and Body Condition had no influence on individual performance. Contrary to previous studies of primates, pheasants with poor performance on PICTs had a wider dietary breadth assayed using a free-choice <span class="hlt">task</span>. Our results demonstrate that in systems or taxa where prior experience and differences in development cannot be accounted for, individual differences in performance on commonly used detour-dependent PICTS may reveal more about an individual's prior experience of transparent objects, or their motivation to acquire food, than providing a reliable measure of their inhibitory <span class="hlt">control</span>. PMID:29593115</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5641896','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5641896"><span>Self-<span class="hlt">control</span> and <span class="hlt">Task</span> Timing Shift Self-efficacy and Influence Willingness to Engage in Effortful <span class="hlt">Tasks</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ein-Gar, Danit; Steinhart, Yael</p> <p>2017-01-01</p> <p>Self-efficacy constitutes a key factor that influences people's inclination to engage in effortful <span class="hlt">tasks</span>. In this study, we focus on an interesting interplay between two prominent factors known to influence engagement in effortful <span class="hlt">tasks</span>: the timing of the <span class="hlt">task</span> (i.e., whether the <span class="hlt">task</span> is scheduled to take place in the near or distant future) and individuals' levels of self-<span class="hlt">control</span>. Across three studies, we show that these two factors have an interacting effect on self-efficacy. Low self-<span class="hlt">control</span> (LSC) individuals report higher self-efficacy for distant-future effortful <span class="hlt">tasks</span> than for near-future <span class="hlt">tasks</span>, whereas high self-<span class="hlt">control</span> (HSC) individuals report higher self-efficacy for near-future <span class="hlt">tasks</span> than for distant future <span class="hlt">tasks</span>. We further demonstrate how self-efficacy then molds individuals' willingness to engage in those effortful <span class="hlt">tasks</span>. Given that a particular <span class="hlt">task</span> may comprise effortful aspects alongside more enjoyable aspects, we show that the effects we observe emerge with regard to a <span class="hlt">task</span> whose effortful aspects are salient and that the effects are eliminated when the enjoyable aspects of that same <span class="hlt">task</span> are highlighted. PMID:29075225</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3727420','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3727420"><span>Methylmercury and elemental <span class="hlt">mercury</span> differentially associate with blood pressure among dental professionals</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Goodrich, Jaclyn M.; Wang, Yi; Gillespie, Brenda; Werner, Robert; Franzblau, Alfred; Basu, Niladri</p> <p>2013-01-01</p> <p>Methylmercury-associated effects on the cardiovascular system have been documented though discrepancies exist, and most studied populations experience elevated methylmercury exposures. No paper has investigated the impact of low-level elemental (inorganic) <span class="hlt">mercury</span> exposure on cardiovascular risk in humans. The purpose of this study was to increase understanding of the association between <span class="hlt">mercury</span> exposure (methylmercury and elemental <span class="hlt">mercury</span>) and blood pressure measures in a cohort of dental professionals that experience background exposures to both <span class="hlt">mercury</span> forms. Dental professionals were recruited during the 2010 Michigan Dental Association Annual Convention. <span class="hlt">Mercury</span> levels in hair and urine samples were analyzed as biomarkers of methylmercury and elemental <span class="hlt">mercury</span> exposure, respectively. Blood pressure (systolic, diastolic) was measured using an automated device. Distribution of <span class="hlt">mercury</span> in hair (mean, range: 0.<span class="hlt">45</span>, 0.02–5.18 μg/g) and urine (0.94, 0.03–5.54 μg/L) correspond well with the US National Health and Nutrition Examination Survey. Linear regression models revealed significant associations between diastolic blood pressure (adjusted for blood pressure medication use) and hair <span class="hlt">mercury</span> (n = 262, p = 0.02). Urine <span class="hlt">mercury</span> results opposed hair <span class="hlt">mercury</span> in many ways. Notably, elemental <span class="hlt">mercury</span> exposure was associated with a significant systolic blood pressure decrease (n = 262, p = 0.04) that was driven by the male population. Associations between blood pressure and two forms of <span class="hlt">mercury</span> were found at exposure levels relevant to the general population, and associations varied according to type of <span class="hlt">mercury</span> exposure and gender. PMID:22494934</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19730007128','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19730007128"><span><span class="hlt">Mercury</span> contamination study for flight system safety</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gorzynski, C. S., Jr.; Maycock, J. N.</p> <p>1972-01-01</p> <p>The effects and prevention of possible <span class="hlt">mercury</span> pollution from the failure of solar electric propulsion spacecraft using <span class="hlt">mercury</span> propellant were studied from tankage loading of post launch trajector injection. During preflight operations and initial flight mode there is little danger of <span class="hlt">mercury</span> pollution if proper safety precautions are taken. Any spillage on the loading, mating, transportation, or launch pad areas is obvious and can be removed by vacuum cleaning soil and chemical fixing. <span class="hlt">Mercury</span> spilled on Cape Kennedy ground soil will be chemically complexed and retained by the sandstone subsoil. A cover layer of sand or gravel on spilled <span class="hlt">mercury</span> which has settled to the bottom of a water body adjacent to the system operation will <span class="hlt">control</span> and eliminate the formation of toxic organic <span class="hlt">mercurials</span>. <span class="hlt">Mercury</span> released into the earth's atmosphere through leakage of a fireball will be diffused to low concentration levels. However, gas phase reactions of <span class="hlt">mercury</span> with ozone could cause a local ozone depletion and result in serious ecological hazards.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19750039849&hterms=mvm&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmvm','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19750039849&hterms=mvm&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmvm"><span>117.6-kilobit telemetry from <span class="hlt">Mercury</span> in-flight system analysis</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Evanchuk, V. L.</p> <p>1974-01-01</p> <p>This paper discusses very specifically the mode of the Mariner Venus/<span class="hlt">Mercury</span> 1973 (MVM'73) telecommunications system in the interplexed dual channel 117.6 kilobits per second (kbps) and 2.<span class="hlt">45</span> kbps telemetry. This mode, originally designed for only Venus encounter, was also used at <span class="hlt">Mercury</span> despite significantly less performance margin. Detailed analysis and careful measurement of system performance before and during flight operations allowed critical operational decisions, which made maximum use of the system capabilities.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17360924','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17360924"><span>Neural changes in <span class="hlt">control</span> implementation of a continuous <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lungu, Ovidiu V; Binenstock, Meagan M; Pline, Megan A; Yeaton, Jennifer R; Carey, James R</p> <p>2007-03-14</p> <p>It is commonly agreed that <span class="hlt">control</span> implementation, being a resource-consuming endeavor, is not exerted continuously or in simple <span class="hlt">tasks</span>. However, most research in the field was done using <span class="hlt">tasks</span> that varied the need for <span class="hlt">control</span> on a trial-by-trial basis (e.g., Stroop, flanker) in a discrete manner. In this case, the anterior cingulate cortex (ACC) was found to monitor the need for <span class="hlt">control</span>, whereas regions in the prefrontal cortex (PFC) were found to be involved in <span class="hlt">control</span> implementation. Whether or not the same <span class="hlt">control</span> mechanism would be used in continuous <span class="hlt">tasks</span> was an open question. In our study, we found that in a continuous <span class="hlt">task</span>, the same neural substrate subserves <span class="hlt">control</span> monitoring (ACC) but that the neural substrate of <span class="hlt">control</span> implementation changes over time. Early in the <span class="hlt">task</span>, regions in the PFC were involved in <span class="hlt">control</span> implementation, whereas later the <span class="hlt">control</span> was taken over by subcortical structures, specifically the caudate. Our results suggest that humans possess a flexible <span class="hlt">control</span> mechanism, with a specific structure dedicated to monitoring the need for <span class="hlt">control</span> and with multiple structures involved in <span class="hlt">control</span> implementation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/867662','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/867662"><span>Method and apparatus for <span class="hlt">controlling</span> the flow rate of <span class="hlt">mercury</span> in a flow system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, Mark W.; Speer, Richard</p> <p>1991-01-01</p> <p>A method for increasing the <span class="hlt">mercury</span> flow rate to a photochemical <span class="hlt">mercury</span> enrichment utilizing an entrainment system comprises the steps of passing a carrier gas over a pool of <span class="hlt">mercury</span> maintained at a first temperature T1, wherein the carrier gas entrains <span class="hlt">mercury</span> vapor; passing said <span class="hlt">mercury</span> vapor entrained carrier gas to a second temperature zone T2 having temperature less than T1 to condense said entrained <span class="hlt">mercury</span> vapor, thereby producing a saturated Hg condition in the carrier gas; and passing said saturated Hg carrier gas to said photochemical enrichment reactor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70177945','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70177945"><span>A downstream voyage with <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, Gary</p> <p>2016-01-01</p> <p>Retrospective essay for the Bulletin of Environmental Contamination and Toxicology.As I look back on my paper, “Effects of Low Dietary Levels of Methyl <span class="hlt">Mercury</span> on Mallard Reproduction,” published in 1974 in the Bulletin of Environmental Contamination and Toxicology, a thought sticks in my mind. I realize just how much my <span class="hlt">mercury</span> research was not unlike a leaf in a stream, carried this way and that, sometimes stalled in an eddy, restarted, and carried downstream at a pace and path that was not completely under my <span class="hlt">control</span>. I was hired in 1969 by the Patuxent Wildlife Research Center to study the effects of environmental pollutants on the behavior of wildlife. A colleague was conducting a study on the reproductive effects of methylmercury on mallards (Anas platyrhynchos), and he offered to give me some of the ducklings. I conducted a pilot study, testing how readily ducklings approached a tape-recorded maternal call. Sample sizes were small, but the results suggested that ducklings from <span class="hlt">mercury</span>-treated parents behaved differently than <span class="hlt">controls</span>. That’s how I got into <span class="hlt">mercury</span> research—pretty much by chance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22578153','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22578153"><span><span class="hlt">Mercury</span> exposure may suppress baseline corticosterone levels in juvenile birds.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Herring, Garth; Ackerman, Joshua T; Herzog, Mark P</p> <p>2012-06-05</p> <p><span class="hlt">Mercury</span> exposure has been associated with a wide variety of negative reproductive responses in birds, however few studies have examined the potential for chick impairment via the hypothalamic-pituitary-adrenal (HPA) axis. The HPA axis regulates corticosterone levels during periods of stress. We examined the relationship between baseline fecal corticosterone metabolite concentrations and <span class="hlt">mercury</span> concentrations in down feathers of recently hatched (<3 days) and blood of older (15-37 days) Forster's tern (Sterna forsteri) chicks in San Francisco Bay, California. Baseline fecal corticosterone metabolite concentrations were negatively correlated with <span class="hlt">mercury</span> concentrations in blood of older chicks (decreasing by 81% across the range of observed <span class="hlt">mercury</span> concentrations) while accounting for positive correlations between corticosterone concentrations and number of fledgling chicks within the colony and chick age. In recently hatched chicks, baseline fecal corticosterone metabolite concentrations were weakly negatively correlated with <span class="hlt">mercury</span> concentrations in down feathers (decreasing by <span class="hlt">45</span>% across the range of observed <span class="hlt">mercury</span> concentrations) while accounting for stronger positive correlations between corticosterone concentrations and colony nest abundance and date. These results indicate that chronic <span class="hlt">mercury</span> exposure may suppress baseline corticosterone concentrations in tern chicks and suggests that a juvenile bird's ability to respond to stress may be reduced via the downregulation of the HPA axis.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27298233','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27298233"><span>Self-<span class="hlt">control</span> assessments of capuchin monkeys with the rotating tray <span class="hlt">task</span> and the accumulation <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Beran, Michael J; Perdue, Bonnie M; Rossettie, Mattea S; James, Brielle T; Whitham, Will; Walker, Bradlyn; Futch, Sara E; Parrish, Audrey E</p> <p>2016-08-01</p> <p>Recent studies of delay of gratification in capuchin monkeys using a rotating tray (RT) <span class="hlt">task</span> have shown improved self-<span class="hlt">control</span> performance in these animals in comparison to the accumulation (AC) <span class="hlt">task</span>. In this study, we investigated whether this improvement resulted from the difference in methods between the rotating tray <span class="hlt">task</span> and previous tests, or whether it was the result of greater overall experience with delay of gratification <span class="hlt">tasks</span>. Experiment 1 produced similar performance levels by capuchins monkeys in the RT and AC <span class="hlt">tasks</span> when identical reward and temporal parameters were used. Experiment 2 demonstrated a similar result using reward amounts that were more similar to previous AC experiments with these monkeys. In Experiment 3, monkeys performed multiple versions of the AC <span class="hlt">task</span> with varied reward and temporal parameters. Their self-<span class="hlt">control</span> behavior was found to be dependent on the overall delay to reward consumption, rather than the overall reward amount ultimately consumed. These findings indicate that these capuchin monkeys' self-<span class="hlt">control</span> capacities were more likely to have improved across studies because of the greater experience they had with delay of gratification <span class="hlt">tasks</span>. Experiment 4 and Experiment 5 tested new, <span class="hlt">task</span>-naïve monkeys on both <span class="hlt">tasks</span>, finding more limited evidence of self-<span class="hlt">control</span>, and no evidence that one <span class="hlt">task</span> was more beneficial than the other in promoting self-<span class="hlt">control</span>. The results of this study suggest that future testing of this kind should focus on temporal parameters and reward magnitude parameters to establish accurate measures of delay of gratification capacity and development in this species and perhaps others. Copyright © 2016 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3403783','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3403783"><span>Five Hundred Years of <span class="hlt">Mercury</span> Exposure and Adaptation</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lombardi, Guido; Lanzirotti, Antonio; Qualls, Clifford; Socola, Francisco; Ali, Abdul-Mehdi; Appenzeller, Otto</p> <p>2012-01-01</p> <p><span class="hlt">Mercury</span> is added to the biosphere by anthropogenic activities raising the question of whether changes in the human chromatin, induced by <span class="hlt">mercury</span>, in a parental generation could allow adaptation of their descendants to <span class="hlt">mercury</span>. We review the history of Andean mining since pre-Hispanic times in Huancavelica, Peru. Despite the persistent degradation of the biosphere today, no overt signs of <span class="hlt">mercury</span> toxicity could be discerned in present day inhabitants. However, <span class="hlt">mercury</span> is especially toxic to the autonomic nervous system (ANS). We, therefore, tested ANS function and biologic rhythms, under the <span class="hlt">control</span> of the ANS, in 5 Huancavelicans and examined the metal content in their hair. <span class="hlt">Mercury</span> levels varied from none to 1.014 ppm, significantly less than accepted standards. This was confirmed by microfocused synchrotron X-ray fluorescence analysis. Biologic rhythms were abnormal and hair growth rate per year, also under ANS <span class="hlt">control</span>, was reduced (P < 0.001). Thus, evidence of <span class="hlt">mercury</span>'s toxicity in ANS function was found without other signs of intoxication. Our findings are consistent with the hypothesis of partial transgenerational inheritance of tolerance to <span class="hlt">mercury</span> in Huancavelica, Peru. This would generally benefit survival in the Anthropocene, the man-made world, we now live in. PMID:22910643</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20663575','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20663575"><span>Subcellular <span class="hlt">controls</span> of <span class="hlt">mercury</span> trophic transfer to a marine fish.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dang, Fei; Wang, Wen-Xiong</p> <p>2010-09-15</p> <p>Different behaviors of inorganic <span class="hlt">mercury</span> [Hg(II)] and methylmercury (MeHg) during trophic transfer along the marine food chain have been widely reported, but the mechanisms are not fully understood. The bioavailability of ingested <span class="hlt">mercury</span>, quantified by assimilation efficiency (AE), was investigated in a marine fish, the grunt Terapon jarbua, based on <span class="hlt">mercury</span> subcellular partitioning in prey and purified subcellular fractions of prey tissues. The subcellular distribution of Hg(II) differed substantially among prey types, with cellular debris being a major (49-57% in bivalves) or secondary (14-19% in other prey) binding pool. However, MeHg distribution varied little among prey types, with most MeHg (43-79%) in heat-stable protein (HSP) fraction. The greater AEs measured for MeHg (90-94%) than for Hg(II) (23-43%) confirmed the findings of previous studies. Bioavailability of each purified subcellular fraction rather than the proposed trophically available metal (TAM) fraction could better elucidate <span class="hlt">mercury</span> assimilation difference. Hg(II) associated with insoluble fraction (e.g. cellular debris) was less bioavailable than that in soluble fraction (e.g. HSP). However, subcellular distribution was shown to be less important for MeHg, with each fraction having comparable MeHg bioavailability. Subcellular distribution in prey should be an important consideration in <span class="hlt">mercury</span> trophic transfer studies. 2010 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol3/pdf/CFR-2010-title45-vol3-sec1155-610.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol3/pdf/CFR-2010-title45-vol3-sec1155-610.pdf"><span><span class="hlt">45</span> CFR 1155.610 - <span class="hlt">Controlled</span> substance.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-10-01</p> <p>... <span class="hlt">45</span> Public Welfare 3 2010-10-01 2010-10-01 false <span class="hlt">Controlled</span> substance. 1155.610 Section 1155.610 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL FOUNDATION ON THE ARTS AND THE... ASSISTANCE) Definitions § 1155.610 <span class="hlt">Controlled</span> substance. <span class="hlt">Controlled</span> substance means a <span class="hlt">controlled</span> substance in...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25635946','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25635946"><span>Social priming improves cognitive <span class="hlt">control</span> in elderly adults--evidence from the Simon <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aisenberg, Daniela; Cohen, Noga; Pick, Hadas; Tressman, Iris; Rappaport, Michal; Shenberg, Tal; Henik, Avishai</p> <p>2015-01-01</p> <p>We examined whether social priming of cognitive states affects the inhibitory process in elderly adults, as aging is related to deficits in inhibitory <span class="hlt">control</span>. Forty-eight elderly adults and <span class="hlt">45</span> young adults were assigned to three groups and performed a cognitive <span class="hlt">control</span> <span class="hlt">task</span> (Simon <span class="hlt">task</span>), which was followed by 3 different manipulations of social priming (i.e., thinking about an 82 year-old person): 1) negative--characterized by poor cognitive abilities, 2) neutral--characterized by acts irrelevant to cognitive abilities, and 3) positive--excellent cognitive abilities. After the manipulation, the Simon <span class="hlt">task</span> was performed again. Results showed improvement in cognitive <span class="hlt">control</span> effects in seniors after the positive manipulation, indicated by a significant decrease in the magnitude of the Simon and interference effects, but not after the neutral and negative manipulations. Furthermore, a healthy pattern of sequential effect (Gratton) that was absent before the manipulation in all 3 groups appeared after the positive manipulation. Namely, the Simon effect was only present after congruent but not after incongruent trials for the positive manipulation group. No influence of manipulations was found in young adults. These meaningful results were replicated in a second experiment and suggest a decrease in conflict interference resulting from positive cognitive state priming. Our study provides evidence that an implicit social concept of a positive cognitive condition in old age can affect the <span class="hlt">control</span> process of the elderly and improve cognitive abilities.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4311990','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4311990"><span>Social Priming Improves Cognitive <span class="hlt">Control</span> in Elderly Adults—Evidence from the Simon <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Aisenberg, Daniela; Cohen, Noga; Pick, Hadas; Tressman, Iris; Rappaport, Michal; Shenberg, Tal; Henik, Avishai</p> <p>2015-01-01</p> <p>We examined whether social priming of cognitive states affects the inhibitory process in elderly adults, as aging is related to deficits in inhibitory <span class="hlt">control</span>. Forty-eight elderly adults and <span class="hlt">45</span> young adults were assigned to three groups and performed a cognitive <span class="hlt">control</span> <span class="hlt">task</span> (Simon <span class="hlt">task</span>), which was followed by 3 different manipulations of social priming (i.e., thinking about an 82 year-old person): 1) negative—characterized by poor cognitive abilities, 2) neutral—characterized by acts irrelevant to cognitive abilities, and 3) positive—excellent cognitive abilities. After the manipulation, the Simon <span class="hlt">task</span> was performed again. Results showed improvement in cognitive <span class="hlt">control</span> effects in seniors after the positive manipulation, indicated by a significant decrease in the magnitude of the Simon and interference effects, but not after the neutral and negative manipulations. Furthermore, a healthy pattern of sequential effect (Gratton) that was absent before the manipulation in all 3 groups appeared after the positive manipulation. Namely, the Simon effect was only present after congruent but not after incongruent trials for the positive manipulation group. No influence of manipulations was found in young adults. These meaningful results were replicated in a second experiment and suggest a decrease in conflict interference resulting from positive cognitive state priming. Our study provides evidence that an implicit social concept of a positive cognitive condition in old age can affect the <span class="hlt">control</span> process of the elderly and improve cognitive abilities. PMID:25635946</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006epsc.conf..206C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006epsc.conf..206C"><span>Analysis of impact craters of <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cremonese, G.; Martellato, E.; Marzari, F.; Massironi, M.; Capria, M. T.</p> <p></p> <p>The size of an impact crater depends on many parameters. As a consequence, it is a demanding <span class="hlt">task</span> to derive the physical and dynamical properties of the projectile from the knowledge of the crater diameter and making few assumptions. In this work we have assumed the same impact velocity of 34 km/s. We report the analysis of some impact crater on <span class="hlt">Mercury</span>, based on the Mariner 10 images. We have used the classical scaling law (Schmidt and Housen, 1987) to obtain the impactor diameter and the experimental law proposed by OKeefe and Ahrens (1982) to calculate the melt volume produced. The calculations have been performed for different meteoroid compositions (iron, basalt, chondrite, and ice), assuming the surface composition of <span class="hlt">Mercury</span> based on anorthosite.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25723898','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25723898"><span>Atmospheric <span class="hlt">mercury</span> footprints of nations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liang, Sai; Wang, Yafei; Cinnirella, Sergio; Pirrone, Nicola</p> <p>2015-03-17</p> <p>The Minamata Convention was established to protect humans and the natural environment from the adverse effects of <span class="hlt">mercury</span> emissions. A cogent assessment of <span class="hlt">mercury</span> emissions is required to help implement the Minamata Convention. Here, we use an environmentally extended multi-regional input-output model to calculate atmospheric <span class="hlt">mercury</span> footprints of nations based on upstream production (meaning direct emissions from the production activities of a nation), downstream production (meaning both direct and indirect emissions caused by the production activities of a nation), and consumption (meaning both direct and indirect emissions caused by final consumption of goods and services in a nation). Results show that nations function differently within global supply chains. Developed nations usually have larger consumption-based emissions than up- and downstream production-based emissions. India, South Korea, and Taiwan have larger downstream production-based emissions than their upstream production- and consumption-based emissions. Developed nations (e.g., United States, Japan, and Germany) are in part responsible for <span class="hlt">mercury</span> emissions of developing nations (e.g., China, India, and Indonesia). Our findings indicate that global <span class="hlt">mercury</span> abatement should focus on multiple stages of global supply chains. We propose three initiatives for global <span class="hlt">mercury</span> abatement, comprising the establishment of <span class="hlt">mercury</span> <span class="hlt">control</span> technologies of upstream producers, productivity improvement of downstream producers, and behavior optimization of final consumers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009JGRG..114.0C08W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009JGRG..114.0C08W"><span>Diminished <span class="hlt">mercury</span> emission from waters with duckweed cover</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wollenberg, Jennifer L.; Peters, Stephen C.</p> <p>2009-06-01</p> <p>Duckweeds (Lemnaceae) are a widely distributed type of floating vegetation in freshwater systems. Under suitable conditions, duckweeds form a dense vegetative mat on the water surface, which reduces light penetration into the water column and limits gas exchange at the water-air interface by decreasing the area of open water surface. Experiments were conducted to determine whether duckweed decreases <span class="hlt">mercury</span> emission by limiting gas diffusion across the water-air interface and attenuating light, or, conversely, enhances emission via transpiration of <span class="hlt">mercury</span> vapor. Microcosm flux chamber experiments indicate that duckweed decreases <span class="hlt">mercury</span> emission from the water surface compared to open water <span class="hlt">controls</span>. Fluxes under duckweed were 17-67% lower than in <span class="hlt">controls</span>, with lower fluxes occurring at higher percent cover. The decrease in <span class="hlt">mercury</span> emission suggests that duckweed may limit emission through one of several mechanisms, including limited gas transport across the air-water interface, decreased photoreactions due to light attenuation, and plant-<span class="hlt">mercury</span> interactions. The results of this experiment were applied to a model lake system to illustrate the magnitude of potential effects on <span class="hlt">mercury</span> cycling. The <span class="hlt">mercury</span> retained in the lake as a result of hindered emission may increase bioaccumulation potential in lakes with duckweed cover.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=proactive+AND+interference&pg=3&id=EJ823650','ERIC'); return false;" href="https://eric.ed.gov/?q=proactive+AND+interference&pg=3&id=EJ823650"><span>An Integrated Model of Cognitive <span class="hlt">Control</span> in <span class="hlt">Task</span> Switching</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Altmann, Erik M.; Gray, Wayne D.</p> <p>2008-01-01</p> <p>A model of cognitive <span class="hlt">control</span> in <span class="hlt">task</span> switching is developed in which <span class="hlt">controlled</span> performance depends on the system maintaining access to a code in episodic memory representing the most recently cued <span class="hlt">task</span>. The main constraint on access to the current <span class="hlt">task</span> code is proactive interference from old <span class="hlt">task</span> codes. This interference and the mechanisms that…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24479953','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24479953"><span>Virtual atmospheric <span class="hlt">mercury</span> emission network in China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liang, Sai; Zhang, Chao; Wang, Yafei; Xu, Ming; Liu, Weidong</p> <p>2014-01-01</p> <p>Top-down analysis of virtual atmospheric <span class="hlt">mercury</span> emission networks can direct efficient demand-side policy making on <span class="hlt">mercury</span> reductions. Taking China-the world's top atmospheric <span class="hlt">mercury</span> emitter-as a case, we identify key contributors to China's atmospheric <span class="hlt">mercury</span> emissions from both the producer and the consumer perspectives. China totally discharged 794.9 tonnes of atmospheric <span class="hlt">mercury</span> emissions in 2007. China's production-side <span class="hlt">control</span> policies should mainly focus on key direct <span class="hlt">mercury</span> emitters such as Liaoning, Hebei, Shandong, Shanxi, Henan, Hunan, Guizhou, Yunnan, and Inner Mongolia provinces and sectors producing metals, nonmetallic mineral products, and electricity and heat power, while demand-side policies should mainly focus on key underlying drivers of <span class="hlt">mercury</span> emissions such as Shandong, Jiangsu, Zhejiang, and Guangdong provinces and sectors of construction activities and equipment manufacturing. China's interregional embodied atmospheric <span class="hlt">mercury</span> flows are generally moving from the inland to the east coast. Beijing-Tianjin (with 4.8 tonnes of net <span class="hlt">mercury</span> inflows) and South Coast (with 3.3 tonnes of net <span class="hlt">mercury</span> inflows) are two largest net-inflow regions, while North (with 5.3 tonnes of net <span class="hlt">mercury</span> outflows) is the largest net-outflow region. We also identify primary supply chains contributing to China's virtual atmospheric <span class="hlt">mercury</span> emission network, which can be used to trace the transfers of production-side and demand-side policy effects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20030055666','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20030055666"><span>Modeling of Depth Cue Integration in Manual <span class="hlt">Control</span> <span class="hlt">Tasks</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Sweet, Barbara T.; Kaiser, Mary K.; Davis, Wendy</p> <p>2003-01-01</p> <p>Psychophysical research has demonstrated that human observers utilize a variety of visual cues to form a perception of three-dimensional depth. However, most of these studies have utilized a passive judgement paradigm, and failed to consider depth-cue integration as a dynamic and <span class="hlt">task</span>-specific process. In the current study, we developed and experimentally validated a model of manual <span class="hlt">control</span> of depth that examines how two potential cues (stereo disparity and relative size) are utilized in both first- and second-order active depth <span class="hlt">control</span> <span class="hlt">tasks</span>. We found that stereo disparity plays the dominate role for determining depth position, while relative size dominates perception of depth velocity. Stereo disparity also plays a reduced role when made less salient (i.e., when viewing distance is increased). Manual <span class="hlt">control</span> models predict that position information is sufficient for first-order <span class="hlt">control</span> <span class="hlt">tasks</span>, while velocity information is required to perform a second-order <span class="hlt">control</span> <span class="hlt">task</span>. Thus, the rules for depth-cue integration in active <span class="hlt">control</span> <span class="hlt">tasks</span> are dependent on both <span class="hlt">task</span> demands and cue quality.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28094918','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28094918"><span><span class="hlt">Mercury</span> Wet Scavenging and Deposition Differences by Precipitation Type.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kaulfus, Aaron S; Nair, Udaysankar; Holmes, Christopher D; Landing, William M</p> <p>2017-03-07</p> <p>We analyze the effect of precipitation type on <span class="hlt">mercury</span> wet deposition using a new database of individual rain events spanning the contiguous United States. Measurements from the <span class="hlt">Mercury</span> Deposition Network (MDN) containing single rainfall events were identified and classified into six precipitation types. <span class="hlt">Mercury</span> concentrations in surface precipitation follow a power law of precipitation depth that is modulated by precipitation system morphology. After <span class="hlt">controlling</span> for precipitation depth, the highest <span class="hlt">mercury</span> deposition occurs in supercell thunderstorms, with decreasing deposition in disorganized thunderstorms, quasi-linear convective systems (QLCS), extratropical cyclones, light rain, and land-falling tropical cyclones. Convective morphologies (supercells, disorganized, and QLCS) enhance wet deposition by a factor of at least 1.6 relative to nonconvective morphologies. <span class="hlt">Mercury</span> wet deposition also varies by geographic region and season. After <span class="hlt">controlling</span> for other factors, we find that <span class="hlt">mercury</span> wet deposition is greater over high-elevation sites, seasonally during summer, and in convective precipitation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=65752&keyword=manager&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=65752&keyword=manager&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>EVALUATION OF <span class="hlt">MERCURY</span> SPECIATION AT POWER PLANTS USING SCR AND SNCR <span class="hlt">CONTROL</span> TECHNOLOGIES</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The paper describes the impact that selective catalytic reduction (SCR), selective noncatalytic reduction (SNCR), and flue gas-conditioning systems have on total <span class="hlt">mercury</span> emissions and on the speciation of <span class="hlt">mercury</span>. If SCR and/or SNCR systems enhance <span class="hlt">mercury</span> conversion/capture, the...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22426427','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22426427"><span>Video game practice optimizes executive <span class="hlt">control</span> skills in dual-<span class="hlt">task</span> and <span class="hlt">task</span> switching situations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Strobach, Tilo; Frensch, Peter A; Schubert, Torsten</p> <p>2012-05-01</p> <p>We examined the relation of action video game practice and the optimization of executive <span class="hlt">control</span> skills that are needed to coordinate two different <span class="hlt">tasks</span>. As action video games are similar to real life situations and complex in nature, and include numerous concurrent actions, they may generate an ideal environment for practicing these skills (Green & Bavelier, 2008). For two types of experimental paradigms, dual-<span class="hlt">task</span> and <span class="hlt">task</span> switching respectively; we obtained performance advantages for experienced video gamers compared to non-gamers in situations in which two different <span class="hlt">tasks</span> were processed simultaneously or sequentially. This advantage was absent in single-<span class="hlt">task</span> situations. These findings indicate optimized executive <span class="hlt">control</span> skills in video gamers. Similar findings in non-gamers after 15 h of action video game practice when compared to non-gamers with practice on a puzzle game clarified the causal relation between video game practice and the optimization of executive <span class="hlt">control</span> skills. Copyright © 2012 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol3/pdf/CFR-2011-title30-vol3-sec817-45.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol3/pdf/CFR-2011-title30-vol3-sec817-45.pdf"><span>30 CFR 817.<span class="hlt">45</span> - Hydrologic balance: Sediment <span class="hlt">control</span> measures.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 30 Mineral Resources 3 2011-07-01 2011-07-01 false Hydrologic balance: Sediment <span class="hlt">control</span> measures. 817.<span class="hlt">45</span> Section 817.<span class="hlt">45</span> Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-UNDERGROUND MINING ACTIVITIES § 817.<span class="hlt">45</span> Hydrologic balance: Sediment <span class="hlt">control</span> measures. (a) Appropriate sediment...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol3/pdf/CFR-2011-title30-vol3-sec816-45.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title30-vol3/pdf/CFR-2011-title30-vol3-sec816-45.pdf"><span>30 CFR 816.<span class="hlt">45</span> - Hydrologic balance: Sediment <span class="hlt">control</span> measures.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 30 Mineral Resources 3 2011-07-01 2011-07-01 false Hydrologic balance: Sediment <span class="hlt">control</span> measures. 816.<span class="hlt">45</span> Section 816.<span class="hlt">45</span> Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-SURFACE MINING ACTIVITIES § 816.<span class="hlt">45</span> Hydrologic balance: Sediment <span class="hlt">control</span> measures. (a) Appropriate sediment...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol3/pdf/CFR-2010-title30-vol3-sec816-45.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol3/pdf/CFR-2010-title30-vol3-sec816-45.pdf"><span>30 CFR 816.<span class="hlt">45</span> - Hydrologic balance: Sediment <span class="hlt">control</span> measures.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Hydrologic balance: Sediment <span class="hlt">control</span> measures. 816.<span class="hlt">45</span> Section 816.<span class="hlt">45</span> Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-SURFACE MINING ACTIVITIES § 816.<span class="hlt">45</span> Hydrologic balance: Sediment <span class="hlt">control</span> measures. (a) Appropriate sediment...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol3/pdf/CFR-2010-title30-vol3-sec817-45.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title30-vol3/pdf/CFR-2010-title30-vol3-sec817-45.pdf"><span>30 CFR 817.<span class="hlt">45</span> - Hydrologic balance: Sediment <span class="hlt">control</span> measures.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Hydrologic balance: Sediment <span class="hlt">control</span> measures. 817.<span class="hlt">45</span> Section 817.<span class="hlt">45</span> Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-UNDERGROUND MINING ACTIVITIES § 817.<span class="hlt">45</span> Hydrologic balance: Sediment <span class="hlt">control</span> measures. (a) Appropriate sediment...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12959541','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12959541"><span>Inheritance of <span class="hlt">mercury</span> tolerance in the aquatic oligochaete Tubifex tubifex.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Vidal, Dora Elva; Horne, Alex John</p> <p>2003-09-01</p> <p>Resistance to contaminants is an important yet unmeasured factor in sediment toxicity tests. The rate at which <span class="hlt">mercury</span> resistance develops and its genetic persistence in the oligochaete worm Tubifex tubifex were studied under laboratory conditions. Worms were raised for four generations under two different sediment treatments, one reference clean sediment, the other contaminated with <span class="hlt">mercury</span>. Worms raised in <span class="hlt">mercury</span>-contaminated sediment developed <span class="hlt">mercury</span> tolerance that persisted even when the worms were raised for three subsequent generations in clean sediment. <span class="hlt">Mercury</span> tolerance was determined by comparative water-only toxicity tests with <span class="hlt">mercury</span> as the only stressor. <span class="hlt">Control</span> worms had a mean lethal concentration (LC50) of 0.18 mg/L(-1). Worms exposed to high levels of <span class="hlt">mercury</span> in sediment had high <span class="hlt">mercury</span> tolerance with a mean LC50 of 1.40 mg/L(-1). When <span class="hlt">mercury</span>-tolerant and <span class="hlt">control</span> <span class="hlt">mercury</span>-intolerant worms were crossed, their descendants also demonstrated <span class="hlt">mercury</span> tolerance during lethal toxicity tests. The LC50 for worm descendants resulting from this cross was 1.39 mg/L(-1). Adaptation to <span class="hlt">mercury</span> exposures occurred rapidly in this group of worms and appears to be due to both phenotypic and genotypic mechanisms. Development of contaminant resistance and adaptation may be common phenomena in aquatic benthic invertebrates, which should be considered during the design and interpretation of toxicity tests.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2078521','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2078521"><span>Exposure to <span class="hlt">mercury</span> in the mine of Almadén</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gómez, Montserrat García; Klink, José Diego Caballero; Boffetta, Paolo; Español, Santiago; Sällsten, Gerd; Quintana, Javier Gómez</p> <p>2007-01-01</p> <p>Objectives To describe the process for obtaining <span class="hlt">mercury</span> and the historical exposure of Almadén miners to <span class="hlt">mercury</span>. Methods Information on every workplace and historical data on production, technological changes in the productive process and biological and environmental values of <span class="hlt">mercury</span> was collected. A job‐exposure matrix was built with these values and the exposure to inorganic <span class="hlt">mercury</span> was estimated quantitatively as μg/l of urine <span class="hlt">mercury</span>. A cumulative exposure index was calculated for every worker by adding the estimates for every year in the different workplaces. Results In the mine, the highest exposures occurred during drilling, with values up to 2.26 mg/m3 in air, 2194 μg/l in urine and 374 μg/l in blood. Furnace operation and cleaning were the <span class="hlt">tasks</span> with the highest values in metallurgy, peaking up to 3.37 mg/m3. The filling of bottles with <span class="hlt">mercury</span> by free fall gave values within a range of 1.13–2.43 mg/m3 in air; these values dropped to 0.32–0.83 mg/m3 after introducing a new ventilation system. The toxicity effects of high doses of inorganic <span class="hlt">mercury</span> on the central nervous and urinary systems have been known for decades. Conclusions The exposure of the workers in Almadén mines to <span class="hlt">mercury</span> has been very high. The extremely high content cinnabar ore of the mine explains the increased concentrations of <span class="hlt">mercury</span> in air at the work places. This, together with inadequate working conditions, explains the high <span class="hlt">mercury</span> levels found in blood and urine during the study period. PMID:17227836</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29239622','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29239622"><span>Coactivation of cognitive <span class="hlt">control</span> networks during <span class="hlt">task</span> switching.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yin, Shouhang; Deák, Gedeon; Chen, Antao</p> <p>2018-01-01</p> <p>The ability to flexibly switch between <span class="hlt">tasks</span> is considered an important component of cognitive <span class="hlt">control</span> that involves frontal and parietal cortical areas. The present study was designed to characterize network dynamics across multiple brain regions during <span class="hlt">task</span> switching. Functional magnetic resonance images (fMRI) were captured during a standard rule-switching <span class="hlt">task</span> to identify switching-related brain regions. Multiregional psychophysiological interaction (PPI) analysis was used to examine effective connectivity between these regions. During switching trials, behavioral performance declined and activation of a generic cognitive <span class="hlt">control</span> network increased. Concurrently, <span class="hlt">task</span>-related connectivity increased within and between cingulo-opercular and fronto-parietal cognitive <span class="hlt">control</span> networks. Notably, the left inferior frontal junction (IFJ) was most consistently coactivated with the 2 cognitive <span class="hlt">control</span> networks. Furthermore, switching-dependent effective connectivity was negatively correlated with behavioral switch costs. The strength of effective connectivity between left IFJ and other regions in the networks predicted individual differences in switch costs. <span class="hlt">Task</span> switching was supported by coactivated connections within cognitive <span class="hlt">control</span> networks, with left IFJ potentially acting as a key hub between the fronto-parietal and cingulo-opercular networks. (PsycINFO Database Record (c) 2018 APA, all rights reserved).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/itr/1999/field_manual_of_wildlife_diseases.pdf#page=349','USGSPUBS'); return false;" href="https://pubs.usgs.gov/itr/1999/field_manual_of_wildlife_diseases.pdf#page=349"><span><span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Franson, J.C.</p> <p>1999-01-01</p> <p><span class="hlt">Mercury</span> has been used by humans for over 2,000 years and was associated with premature deaths of cinnabar (mercuric sulfide) miners as early as 700 B.C. More recent human poisonings have been related to agricultural and industrial uses of <span class="hlt">mercury</span>. One of the best documented of these cases occurred in the 1950s in Minamata Bay, Japan, when <span class="hlt">mercury</span> was discharged into the environment and accumulated in fish and shellfish used as human food. In addition to human poisonings, <span class="hlt">mercury</span> poisoning or toxicosis has been identified in many other species.<span class="hlt">Mercury</span> is sometimes used to recover gold from stream sediments, and it may pose hazards to wildlife if it is released to the environment during ore recovery. Fungicidal treatment of seeds with <span class="hlt">mercury</span> was common in the 1950s and 1960s, but this agricultural practice has been largely halted in the Northern Hemisphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-PIA00437.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-PIA00437.html"><span>Planet <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1999-06-12</p> <p>The first image of <span class="hlt">Mercury</span> acquired by NASA's Mariner 10 in 1974. During its flight, Mariner 10's trajectory brought it behind the lighted hemisphere of <span class="hlt">Mercury</span>, where this image was taken, in order to acquire important measurements with other instruments. This picture was acquired from a distance of 3,340,000 miles (5,380,000 km) from the surface of <span class="hlt">Mercury</span>. The diameter of <span class="hlt">Mercury</span> (3,031 miles; 4,878 km) is about 1/3 that of Earth. Images of <span class="hlt">Mercury</span> were acquired in two steps, an inbound leg (images acquired before passing into <span class="hlt">Mercury</span>'s shadow) and an outbound leg (after exiting from <span class="hlt">Mercury</span>'s shadow). More than 2300 useful images of <span class="hlt">Mercury</span> were taken, both moderate resolution (3-20 km/pixel) color and high resolution (better than 1 km/pixel) black and white coverage. http://photojournal.jpl.nasa.gov/catalog/PIA00437</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=PIA00437&hterms=mercury+planet&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dmercury%2Bplanet','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=PIA00437&hterms=mercury+planet&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dmercury%2Bplanet"><span>Planet <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1974-01-01</p> <p>Mariner 10's first image of <span class="hlt">Mercury</span> acquired on March 24, 1974. During its flight, Mariner 10's trajectory brought it behind the lighted hemisphere of <span class="hlt">Mercury</span>, where this image was taken, in order to acquire important measurements with other instruments.<p/>This picture was acquired from a distance of 3,340,000 miles (5,380,000 km) from the surface of <span class="hlt">Mercury</span>. The diameter of <span class="hlt">Mercury</span> (3,031 miles; 4,878 km) is about 1/3 that of Earth.<p/>Images of <span class="hlt">Mercury</span> were acquired in two steps, an inbound leg (images acquired before passing into <span class="hlt">Mercury</span>'s shadow) and an outbound leg (after exiting from <span class="hlt">Mercury</span>'s shadow). More than 2300 useful images of <span class="hlt">Mercury</span> were taken, both moderate resolution (3-20 km/pixel) color and high resolution (better than 1 km/pixel) black and white coverage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26120859','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26120859"><span>[Evaluation of the <span class="hlt">mercury</span> accumulating capacity of pepper (Capsicum annuum)].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pérez-Vargas, Híver M; Vidal-Durango, Jhon V; Marrugo-Negrete, José L</p> <p>2014-01-01</p> <p>To assess the <span class="hlt">mercury</span> accumulating capacity in contaminated soils from the community of Mina Santa Cruz, in the south of the department of Bolívar, Colombia, of the pepper plant (Capsicum annuum), in order to establish the risk to the health of the consuming population. Samples were taken from tissues (roots, stems, and leaves) of pepper plants grown in two soils contaminated with <span class="hlt">mercury</span> and a <span class="hlt">control</span> soil during the first five months of growth to determine total <span class="hlt">mercury</span> through cold vapor atomic absorption spectrometry. Total <span class="hlt">mercury</span> was determined in the samples of pepper plant fruits consumed in Mina Santa Cruz. The mean concentrations of total <span class="hlt">mercury</span> in the roots were higher than in stems and leaves. Accumulation in tissues was influenced by <span class="hlt">mercury</span> levels in soil and the growth time of the plants. <span class="hlt">Mercury</span> concentrations in fruits of pepper plant were lower than tolerable weekly intake provided by WHO. Percent of translocation of <span class="hlt">mercury</span> to aerial parts of the plant were low in both <span class="hlt">control</span> and contaminated soils. Despite low levels of <span class="hlt">mercury</span> in this food, it is necessary to minimize the consumption of food contaminated with this metal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol2/pdf/CFR-2010-title45-vol2-sec402-21.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol2/pdf/CFR-2010-title45-vol2-sec402-21.pdf"><span><span class="hlt">45</span> CFR 402.21 - Fiscal <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-10-01</p> <p>... <span class="hlt">45</span> Public Welfare 2 2010-10-01 2010-10-01 false Fiscal <span class="hlt">control</span>. 402.21 Section 402.21 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN... Administration of Grants § 402.21 Fiscal <span class="hlt">control</span>. (a) Fiscal <span class="hlt">control</span> and accounting procedures must be sufficient...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title45-vol2/pdf/CFR-2011-title45-vol2-sec402-21.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title45-vol2/pdf/CFR-2011-title45-vol2-sec402-21.pdf"><span><span class="hlt">45</span> CFR 402.21 - Fiscal <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-10-01</p> <p>... <span class="hlt">45</span> Public Welfare 2 2011-10-01 2011-10-01 false Fiscal <span class="hlt">control</span>. 402.21 Section 402.21 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN... Administration of Grants § 402.21 Fiscal <span class="hlt">control</span>. (a) Fiscal <span class="hlt">control</span> and accounting procedures must be sufficient...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title45-vol2/pdf/CFR-2013-title45-vol2-sec402-21.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title45-vol2/pdf/CFR-2013-title45-vol2-sec402-21.pdf"><span><span class="hlt">45</span> CFR 402.21 - Fiscal <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-10-01</p> <p>... <span class="hlt">45</span> Public Welfare 2 2013-10-01 2012-10-01 true Fiscal <span class="hlt">control</span>. 402.21 Section 402.21 Public Welfare Regulations Relating to Public Welfare OFFICE OF REFUGEE RESETTLEMENT, ADMINISTRATION FOR CHILDREN... Administration of Grants § 402.21 Fiscal <span class="hlt">control</span>. (a) Fiscal <span class="hlt">control</span> and accounting procedures must be sufficient...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/285172-mercury-study-report-congress-volume-health-effects-mercury-mercury-compounds-sab-review-draft','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/285172-mercury-study-report-congress-volume-health-effects-mercury-mercury-compounds-sab-review-draft"><span><span class="hlt">Mercury</span> study report to Congress. Volume 4. Health effects of <span class="hlt">mercury</span> and <span class="hlt">mercury</span> compounds. Sab review draft</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Schoeny, R.</p> <p>1996-06-01</p> <p>This volume of the draft <span class="hlt">Mercury</span> Study Report to Congress summarizes the available information on human health effects and animal data for hazard identification and dose-response assessment for three forms of <span class="hlt">mercury</span>: elemental <span class="hlt">mercury</span>, <span class="hlt">mercury</span> chloride (inorganic <span class="hlt">mercury</span>), and methylmercury (organic <span class="hlt">mercury</span>). Effects are summarized by endpoint. The risk assessment evaluates carcinogenicity, mutagenicity, developmental toxicity and general systemic toxicity of these chemical species of <span class="hlt">mercury</span>. Toxicokinetics (absorption, distribution, metabolism and excretion) are described for each of the three <span class="hlt">mercury</span> species. PBPK models are described, but not applied in risk assessment. Reference doses are calculated for inorganic and methylmercury; a referencemore » concentration for inhaled elemental <span class="hlt">mercury</span> is provided. A quantitiative analysis of factors contributing to variability and uncertainty in the methylmercury RfD is provided in an appendix. Interations and sensitive populations are described.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19780043827&hterms=digital+transformation&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Ddigital%2Btransformation','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19780043827&hterms=digital+transformation&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Ddigital%2Btransformation"><span>Digital processing of the Mariner 10 images of Venus and <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Soha, J. M.; Lynn, D. J.; Mosher, J. A.; Elliot, D. A.</p> <p>1977-01-01</p> <p>An extensive effort was devoted to the digital processing of the Mariner 10 images of Venus and <span class="hlt">Mercury</span> at the Image Processing Laboratory of the Jet Propulsion Laboratory. This effort was designed to optimize the display of the considerable quantity of information contained in the images. Several image restoration, enhancement, and transformation procedures were applied; examples of these techniques are included. A particular <span class="hlt">task</span> was the construction of large mosaics which characterize the surface of <span class="hlt">Mercury</span> and the atmospheric structure of Venus.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1092757','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1092757"><span>Sorbents for the oxidation and removal of <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Olson, Edwin S; Holmes, Michael J; Pavlish, John Henry</p> <p>2013-08-20</p> <p>A promoted activated carbon sorbent is described that is highly effective for the removal of <span class="hlt">mercury</span> from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and <span class="hlt">mercury</span> capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or <span class="hlt">mercury</span> capture. <span class="hlt">Mercury</span> removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and <span class="hlt">control</span> of the active sorbent into the <span class="hlt">mercury</span> contaminated gas stream are described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/985401','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/985401"><span>Sorbents for the oxidation and removal of <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Olson, Edwin S [Grand Forks, ND; Holmes, Michael J [Thompson, ND; Pavlish, John H [East Grand Forks, MN</p> <p>2008-10-14</p> <p>A promoted activated carbon sorbent is described that is highly effective for the removal of <span class="hlt">mercury</span> from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and <span class="hlt">mercury</span> capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or <span class="hlt">mercury</span> capture. <span class="hlt">Mercury</span> removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and <span class="hlt">control</span> of the active sorbent into the <span class="hlt">mercury</span> contaminated gas stream are described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1044069','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1044069"><span>Sorbents for the oxidation and removal of <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Olson, Edwin S [Grand Forks, ND; Holmes, Michael J [Thompson, ND; Pavlish, John H [East Grand Forks, MN</p> <p>2012-05-01</p> <p>A promoted activated carbon sorbent is described that is highly effective for the removal of <span class="hlt">mercury</span> from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and <span class="hlt">mercury</span> capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or <span class="hlt">mercury</span> capture. <span class="hlt">Mercury</span> removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and <span class="hlt">control</span> of the active sorbent into the <span class="hlt">mercury</span> contaminated gas stream are described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1154945','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1154945"><span>Sorbents for the oxidation and removal of <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Olson, Edwin S.; Holmes, Michael J.; Pavlish, John Henry</p> <p>2014-09-02</p> <p>A promoted activated carbon sorbent is described that is highly effective for the removal of <span class="hlt">mercury</span> from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and <span class="hlt">mercury</span> capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or <span class="hlt">mercury</span> capture. <span class="hlt">Mercury</span> removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and <span class="hlt">control</span> of the active sorbent into the <span class="hlt">mercury</span> contaminated gas stream are described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=138743&keyword=hydrogen+AND+catalytic+AND+combustion&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=138743&keyword=hydrogen+AND+catalytic+AND+combustion&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>INVESTIGATION OF SELECTIVE CATALYTIC REDUCTION IMPACT ON <span class="hlt">MERCURY</span> SPECIATION UNDER SIMULATED NOX EMISSION <span class="hlt">CONTROL</span> CONDITIONS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Selective catalytic reduction (SCR) technology is being increasingly applied for <span class="hlt">controlling</span> emissions of nitrogen oxides (NOx) from coal-fired boilers. Some recent field and pilot studies suggest that the operation of SCR could affect the chemical form of <span class="hlt">mercury</span> in the coal com...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19028001','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19028001"><span>The role of sorption and bacteria in <span class="hlt">mercury</span> partitioning and bioavailability in artificial sediments.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhong, Huan; Wang, Wen-Xiong</p> <p>2009-03-01</p> <p>This study compared the relative importance of three types of sorption (organic matter-particle, <span class="hlt">mercury</span>-organic matter and <span class="hlt">mercury</span>-particle) in <span class="hlt">controlling</span> the overall <span class="hlt">mercury</span> partitioning and bioavailability in sediments. We found that all three types of sorption were important for both inorganic <span class="hlt">mercury</span> (Hg) and methylated <span class="hlt">mercury</span> (MeHg). <span class="hlt">Mercury</span>-particle sorption was more important than <span class="hlt">mercury</span>-fulvic acid (FA) sorption in increasing the <span class="hlt">mercury</span> concentrations with increasing aging. Bioavailability (quantified by gut juice extraction from sipunculans) was mainly <span class="hlt">controlled</span> by <span class="hlt">mercury</span>-particle sorption, while FA-particle and <span class="hlt">mercury</span>-FA sorption were not as important, especially for MeHg. Bacterial activity also increased the partitioning of Hg or MeHg in the sediments and was further facilitated by the presence of organic matter. The bioavailability of Hg or MeHg from sediments was only slightly influenced by bacterial activity. This study highlights the importance of sorption from various sources (especially <span class="hlt">mercury</span>-particle sorption) as well as bacteria in <span class="hlt">controlling</span> the partitioning and bioavailability of Hg or MeHg in sediments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/827235','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/827235"><span>Phytoremediation of Ionic and Methyl <span class="hlt">Mercury</span> P</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Meagher, Richard B.</p> <p>1999-06-01</p> <p>Our long-term goal is to enable highly productive plant species to extract, resist, detoxify, and/or sequester toxic heavy metal pollutants as an environmentally friendly alternative to physical remediation methods. We have focused this phytoremediation research on soil and water-borne ionic and methylmercury. <span class="hlt">Mercury</span> pollution is a serious world-wide problem affecting the health of human and wild-life populations. Methylmercury, produced by native bacteria at <span class="hlt">mercury</span>-contaminated wetland sites, is a particularly serious problem due to its extreme toxicity and efficient biomagnification in the food chain. We engineered several plant species (e.g., Arabidopsis, tobacco, canola, yellow poplar, rice) to express the bacterial genes,more » merB and/or merA, under the <span class="hlt">control</span> of plant regulatory sequences. These transgenic plants acquired remarkable properties for <span class="hlt">mercury</span> remediation. (1) Transgenic plants expressing merB (organomercury lyase) extract methylmercury from their growth substrate and degrade it to less toxic ionic <span class="hlt">mercury</span>. They grow on concentrations of methylmercury that kill normal plants and accumulate low levels of ionic <span class="hlt">mercury</span>. (2) Transgenic plants expressing merA (mercuric ion reductase) extract and electrochemically reduce toxic, reactive ionic <span class="hlt">mercury</span> to much less toxic and volatile metallic <span class="hlt">mercury</span>. This metal transformation is driven by the powerful photosynthetic reducing capacity of higher plants that generates excess NADPH using solar energy. MerA plants grow vigorously on levels of ionic <span class="hlt">mercury</span> that kill <span class="hlt">control</span> plants. Plants expressing both merB and merA degrade high levels of methylmercury and volatilize metallic <span class="hlt">mercury</span>. These properties were shown to be genetically stable for several generations in the two plant species examined. Our work demonstrates that native trees, shrubs, and grasses can be engineered to remediate the most abundant toxic <span class="hlt">mercury</span> pollutants. Building on these data our working hypothesis for the next grant period</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/867871','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/867871"><span>Recovery of <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds via electrolytic methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, Mark W.; George, William A.</p> <p>1991-01-01</p> <p>A process for electrolytically recovering <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched <span class="hlt">mercury</span> compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where <span class="hlt">mercury</span> ions are electrolytically reduced and elemental <span class="hlt">mercury</span> recovered from the <span class="hlt">mercury</span> compounds.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/866737','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/866737"><span>Recovery of <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds via electrolytic methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, Mark W.; George, William A.</p> <p>1988-01-01</p> <p>A process for electrolytically recovering <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched <span class="hlt">mercury</span> compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where <span class="hlt">mercury</span> ions are electrolytically reduced and elemental <span class="hlt">mercury</span> recovered from the <span class="hlt">mercury</span> compounds.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/867164','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/867164"><span>Recovery of <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds via electrolytic methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, Mark W.; George, William A.</p> <p>1989-01-01</p> <p>A process for electrolytically recovering <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched <span class="hlt">mercury</span> compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where <span class="hlt">mercury</span> ions are electrolytically reduced and elemental <span class="hlt">mercury</span> recovered from the <span class="hlt">mercury</span> compounds.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/7084471','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/7084471"><span>Recovery of <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds via electrolytic methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, M.W.; George, W.A.</p> <p>1991-06-18</p> <p>A process for electrolytically recovering <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds is provided. In one embodiment, Hg is recovered from Hg[sub 2]Cl[sub 2] employing as the electrolyte solution a mixture of HCl and H[sub 2]O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H[sub 2]O. Also provided is an apparatus for producing isotopically enriched <span class="hlt">mercury</span> compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where <span class="hlt">mercury</span> ions are electrolytically reduced and elemental <span class="hlt">mercury</span> recovered from the <span class="hlt">mercury</span> compounds. 3 figures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/7019894','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/biblio/7019894"><span>Recovery of <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds via electrolytic methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Grossman, M.W.; George, W.A.</p> <p>1989-11-07</p> <p>A process for electrolytically recovering <span class="hlt">mercury</span> from <span class="hlt">mercury</span> compounds is provided. In one embodiment, Hg is recovered from Hg[sub 2]Cl[sub 2] employing as the electrolyte solution a mixture of HCl and H[sub 2]O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H[sub 2]O. Also provided is an apparatus for producing isotopically enriched <span class="hlt">mercury</span> compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where <span class="hlt">mercury</span> ions are electrolytically reduced and elemental <span class="hlt">mercury</span> recovered from the <span class="hlt">mercury</span> compounds. 3 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27736272','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27736272"><span>Training Attentional <span class="hlt">Control</span> Improves Cognitive and Motor <span class="hlt">Task</span> Performance.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ducrocq, Emmanuel; Wilson, Mark; Vine, Sam; Derakshan, Nazanin</p> <p>2016-10-01</p> <p>Attentional <span class="hlt">control</span> is a necessary function for the regulation of goal-directed behavior. In three experiments we investigated whether training inhibitory <span class="hlt">control</span> using a visual search <span class="hlt">task</span> could improve <span class="hlt">task</span>-specific measures of attentional <span class="hlt">control</span> and performance. In Experiment 1 results revealed that training elicited a near-transfer effect, improving performance on a cognitive (antisaccade) <span class="hlt">task</span> assessing inhibitory <span class="hlt">control</span>. In Experiment 2 an initial far-transfer effect of training was observed on an index of attentional <span class="hlt">control</span> validated for tennis. The principal aim of Experiment 3 was to expand on these findings by assessing objective gaze measures of inhibitory <span class="hlt">control</span> during the performance of a tennis <span class="hlt">task</span>. Training improved inhibitory <span class="hlt">control</span> and performance when pressure was elevated, confirming the mechanisms by which cognitive anxiety impacts performance. These results suggest that attentional <span class="hlt">control</span> training can improve inhibition and reduce taskspecific distractibility with promise of transfer to more efficient sporting performance in competitive contexts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24696133','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24696133"><span>Conflict <span class="hlt">control</span> in <span class="hlt">task</span> conflict and response conflict.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Braverman, Ami; Meiran, Nachshon</p> <p>2015-03-01</p> <p>Studies have suggested that conflict <span class="hlt">control</span> can modulate conflict effects in response to differing levels of conflict context. The current study probed, in two experiments of proportion congruence, the relevance of both <span class="hlt">task</span> conflict (between a currently relevant <span class="hlt">task</span> and irrelevant <span class="hlt">task</span> alternatives) and response conflict (between a currently relevant response and irrelevant response alternatives) to conflict <span class="hlt">control</span>. In Experiment 1, proportion congruence between blocks was manipulated and in Experiment 2, proportion congruence was manipulated between items. The response conflict effect was smaller when proportion of incongruence was high, regardless if <span class="hlt">task</span> conflict or response conflict proportions were manipulated. These findings suggest that both <span class="hlt">task</span> conflict and response conflict are monitored but that only response conflict is being influenced by this monitoring process. Theoretical implications are discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title49-vol2/pdf/CFR-2010-title49-vol2-sec173-164.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title49-vol2/pdf/CFR-2010-title49-vol2-sec173-164.pdf"><span>49 CFR 173.164 - <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-10-01</p> <p>... 49 Transportation 2 2010-10-01 2010-10-01 false <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>... Than Class 1 and Class 7 § 173.164 <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>). (a) For transportation by aircraft, <span class="hlt">mercury</span> must be packaged in packagings which meet the requirements of part 178 of...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title49-vol2/pdf/CFR-2012-title49-vol2-sec173-164.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title49-vol2/pdf/CFR-2012-title49-vol2-sec173-164.pdf"><span>49 CFR 173.164 - <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-10-01</p> <p>... 49 Transportation 2 2012-10-01 2012-10-01 false <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>... Than Class 1 and Class 7 § 173.164 <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>). (a) For transportation by aircraft, <span class="hlt">mercury</span> must be packaged in packagings which meet the requirements of part 178 of...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title49-vol2/pdf/CFR-2011-title49-vol2-sec173-164.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title49-vol2/pdf/CFR-2011-title49-vol2-sec173-164.pdf"><span>49 CFR 173.164 - <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-10-01</p> <p>... 49 Transportation 2 2011-10-01 2011-10-01 false <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>... Than Class 1 and Class 7 § 173.164 <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>). (a) For transportation by aircraft, <span class="hlt">mercury</span> must be packaged in packagings which meet the requirements of part 178 of...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title49-vol2/pdf/CFR-2014-title49-vol2-sec173-164.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title49-vol2/pdf/CFR-2014-title49-vol2-sec173-164.pdf"><span>49 CFR 173.164 - <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-10-01</p> <p>... 49 Transportation 2 2014-10-01 2014-10-01 false <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>... Than Class 1 and Class 7 § 173.164 <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>). (a) For transportation by aircraft, <span class="hlt">mercury</span> must be packaged in packagings which meet the requirements of part 178 of...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title49-vol2/pdf/CFR-2013-title49-vol2-sec173-164.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title49-vol2/pdf/CFR-2013-title49-vol2-sec173-164.pdf"><span>49 CFR 173.164 - <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>).</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-10-01</p> <p>... 49 Transportation 2 2013-10-01 2013-10-01 false <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>... Than Class 1 and Class 7 § 173.164 <span class="hlt">Mercury</span> (metallic and articles containing <span class="hlt">mercury</span>). (a) For transportation by aircraft, <span class="hlt">mercury</span> must be packaged in packagings which meet the requirements of part 178 of...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.B13F..03N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.B13F..03N"><span>New Mechanisms of <span class="hlt">Mercury</span> Binding to Peat</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nagy, K. L.; Manceau, A.; Gasper, J. D.; Ryan, J. N.; Aiken, G. R.</p> <p>2007-12-01</p> <p><span class="hlt">Mercury</span> can be immobilized in the aquatic environment by binding to peat, a solid form of natural organic matter. Binding mechanisms can vary in strength and reversibility, and therefore will <span class="hlt">control</span> concentrations of bioreactive <span class="hlt">mercury</span>, may explain rates of <span class="hlt">mercury</span> methylation, and are important for designing approaches to improve water quality using natural wetlands or engineered phytoremediation schemes. In addition, strong binding between <span class="hlt">mercury</span> and peat is likely to result in the fixation of <span class="hlt">mercury</span> that ultimately resides in coal. The mechanisms by which aqueous <span class="hlt">mercury</span> at low concentrations reacts with both dissolved and solid natural organic matter remain incompletely understood, despite recent efforts. We have identified three distinct binding mechanisms of divalent cationic <span class="hlt">mercury</span> to solid peats from the Florida Everglades using EXAFS spectroscopic data (FAME beamline, European Synchrotron Radiation Facility (ESRF)) obtained on experimental samples as compared to relevant references including <span class="hlt">mercury</span>-bearing solids and <span class="hlt">mercury</span> bound to various organic molecules. The proportions of the three molecular configurations vary with Hg concentration, and two new configurations that involve sulfur ligands occur at Hg concentrations up to about 4000 ppm. The binding mechanism at the lowest experimental Hg concentration (60-80 ppm) elucidates published reports on the inhibition of metacinnabar formation in the presence of Hg-bearing solutions and dissolved natural organic matter, and also, the differences in extent of <span class="hlt">mercury</span> methylation in distinct areas of the Florida Everglades.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24400932','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24400932"><span>Serum biochemical markers of central nerve system damage in children with acute elemental <span class="hlt">mercury</span> intoxicatıon.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yılmaz, F M; Yılmaz, H; Tutkun, E; Uysal, S; Carman, K B; Dılber, C; Ercan, M</p> <p>2014-01-01</p> <p>Acute <span class="hlt">mercury</span> intoxication among children can occur through unintentional exposure, and neurotoxicity is one of the main findings in acute exposures. In this study, we aimed to study the central nerve system markers, namely neuron-specific enolase (NSE), S100B, and glutamate receptor (GRIA 1) levels and discuss the mechanisms of central nerve system damage and whether these parameters could be used as markers of acute elemental <span class="hlt">mercury</span> intoxication neurotoxicity. This is a case-<span class="hlt">control</span> study which includes 169 children with acute elemental <span class="hlt">mercury</span> intoxication, who were exposed to <span class="hlt">mercury</span> in the school laboratory from a broken jar, and <span class="hlt">45</span> sex- and age-matched <span class="hlt">controls</span> without <span class="hlt">mercury</span> exposure. Patient group were divided into three subgroups according to the neurological examination performed during the admission. Neuropathy Group included the children with neurological symptoms including peripheral neuropathy and decreased muscle strength (n = 39) (with or without dilated pupils). Dilated Pupil Group included the children who had mid-dilated/dilated pupils (n = 52). Asymptomatic Exposure Group included the children who did not have any neurological symptoms (n = 78). Serum NSE, S100B, GRIA 1, blood, and urine <span class="hlt">mercury</span> levels were determined. NSE, S100B, GRIA 1, and blood <span class="hlt">mercury</span> levels were significantly higher in exposed group than the nonexposed subjects (Median values NSE 22.4 ng/mL, 17.2 ng/mL; S100B 0.09 ng/mL, 0.08 ng/mL; GRIA 1 70.6 pg/mL, 54.1 pg/mL, and blood <span class="hlt">mercury</span> 15.2 μg/L, 0.23 μg/L for exposed and nonexposed groups, respectively). GRIA 1 levels found to differ between exposed and nonexposed groups and it has also been found to be increased in the subgroups with positive neurological findings compared to that in neurological finding negative groups. S100B levels were found to be increased in exposed and having neurological symptom groups. There was not a significant difference between exposed-not having neurological symptom patients and <span class="hlt">control</span> group</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-GRC-1960-C-54344.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-GRC-1960-C-54344.html"><span><span class="hlt">Mercury</span> Capsule Retrorocket Test in the Altitude Wind Tunnel</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1960-09-21</p> <p>A mechanic at the National Aeronautics and Space Administration (NASA) Lewis Research Center prepares the inverted base of a <span class="hlt">Mercury</span> capsule for a test of its posigrade retrorockets inside the Altitude Wind Tunnel. In October 1959 NASA’s Space <span class="hlt">Task</span> Group allocated several Project <span class="hlt">Mercury</span> assignments to Lewis. The Altitude Wind Tunnel was modified to test the Atlas separation system, study the escape tower rocket plume, train astronauts to bring a spinning capsule under <span class="hlt">control</span>, and calibrate the capsule’s retrorockets. The turning vanes, makeup air pipes, and cooling coils were removed from the wide western end of the tunnel to create a 51-foot diameter test chamber. The <span class="hlt">Mercury</span> capsule had a six-rocket retro-package affixed to the bottom of the capsule. Three of these were posigrade rockets used to separate the capsule from the booster and three were retrograde rockets used to slow the capsule for reentry into the earth’s atmosphere. Performance of the retrorockets was vital since there was no backup system. Qualification tests of the retrorockets began in April 1960 on a retrograde thrust stand inside the southwest corner of the Altitude Wind Tunnel. These studies showed that a previous issue concerning the delayed ignition of the propellant had been resolved. Follow-up test runs verified reliability of the igniter’s attachment to the propellant. In addition, the capsule’s retrorockets were calibrated so they would not alter the capsule’s attitude when fired.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/885166','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/885166"><span>Phytoremediation of Ionic and Methyl <span class="hlt">Mercury</span> Pollution</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Meagher, Richard B.</p> <p></p> <p> plants to <span class="hlt">control</span> the chemical speciation, electrochemical state, transport, and aboveground binding of <span class="hlt">mercury</span> in order to manage this toxicant.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/pp/pp1780/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/pp/pp1780/"><span><span class="hlt">Mercury</span> in Indiana watersheds: retrospective for 2001-2006</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Risch, Martin R.; Baker, Nancy T.; Fowler, Kathleen K.; Egler, Amanda L.; Lampe, David C.</p> <p>2010-01-01</p> <p> exceeded the 0.3 milligram per kilogram (mg/kg) U.S. Environmental Protection Agency (USEPA) methylmercury criterion in 12.4 percent of the 1,731 samples. The median wet-weight concentration in the fish-tissue samples was 0.13 mg/kg, and the maximum was 1.07 mg/kg. A coarse-scale analysis of all fish-tissue data in each watershed and a fine-scale analysis of data within 5 kilometers (km) of the downstream end of each watershed showed similar results overall. <span class="hlt">Mercury</span> concentrations in fish-tissue samples were highest in the White River watershed in southern Indiana and the Fall Creek watershed in central Indiana. In fish-tissue samples within 5 km of the downstream end of a watershed, the USEPA methylmercury criterion was exceeded by <span class="hlt">45</span> percent of <span class="hlt">mercury</span> concentrations from the White River watershed and 40 percent of the <span class="hlt">mercury</span> concentration from the Fall Creek watershed. A clear relation between <span class="hlt">mercury</span> concentrations in fish-tissue samples and methylmercury concentrations in water was not observed in the data from watersheds in Indiana. Average annual atmospheric <span class="hlt">mercury</span> wet-deposition rates were mapped with data at 156 locations in Indiana and four surrounding states for 2001-2006. These maps revealed an area in southeastern Indiana with high <span class="hlt">mercury</span> wet-deposition rates-from 15 to 19 micrograms per square meter per year (ug/m2/yr). Annual atmospheric <span class="hlt">mercury</span> dry-deposition rates were estimated with an inferential method by using concentrations of <span class="hlt">mercury</span> species in air samples at three locations in Indiana. <span class="hlt">Mercury</span> dry deposition-rates were 5.6 to 13.6 ug/m2/yr and were 0.49 to 1.4 times <span class="hlt">mercury</span> wet-deposition rates. Total <span class="hlt">mercury</span> concentrations were detected in 96 percent of 402 samples of wastewater effluent from 50 publicly owned treatment works in the watersheds; the median concentration was 3.0 ng/L, and the maximum was 88 ng/L. When these concentrations were compared to Indiana water-quality criteria for <span class="hlt">mercury</span>, 12 percent exceeded the 12-n</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70027569','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70027569"><span>Incorporating uncertainty in watershed management decision-making: A <span class="hlt">mercury</span> TMDL case study</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Labiosa, W.; Leckie, J.; Shachter, R.; Freyberg, D.; Rytuba, J.; ,</p> <p>2005-01-01</p> <p>Water quality impairment due to high <span class="hlt">mercury</span> fish tissue concentrations and high <span class="hlt">mercury</span> aqueous concentrations is a widespread problem in several sub-watersheds that are major sources of <span class="hlt">mercury</span> to the San Francisco Bay. Several <span class="hlt">mercury</span> Total Maximum Daily Load regulations are currently being developed to address this problem. Decisions about <span class="hlt">control</span> strategies are being made despite very large uncertainties about current <span class="hlt">mercury</span> loading behavior, relationships between total <span class="hlt">mercury</span> loading and methyl <span class="hlt">mercury</span> formation, and relationships between potential <span class="hlt">controls</span> and <span class="hlt">mercury</span> fish tissue levels. To deal with the issues of very large uncertainties, data limitations, knowledge gaps, and very limited State agency resources, this work proposes a decision analytical alternative for <span class="hlt">mercury</span> TMDL decision support. The proposed probabilistic decision model is Bayesian in nature and is fully compatible with a "learning while doing" adaptive management approach. Strategy evaluation, sensitivity analysis, and information collection prioritization are examples of analyses that can be performed using this approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol3/pdf/CFR-2010-title45-vol3-sec630-610.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title45-vol3/pdf/CFR-2010-title45-vol3-sec630-610.pdf"><span><span class="hlt">45</span> CFR 630.610 - <span class="hlt">Controlled</span> substance.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-10-01</p> <p>... <span class="hlt">45</span> Public Welfare 3 2010-10-01 2010-10-01 false <span class="hlt">Controlled</span> substance. 630.610 Section 630.610 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION GOVERNMENTWIDE REQUIREMENTS FOR DRUG-FREE WORKPLACE (FINANCIAL ASSISTANCE) Definitions § 630.610 <span class="hlt">Controlled</span>...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20713298','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20713298"><span>Statistical estimate of <span class="hlt">mercury</span> removal efficiencies for air pollution <span class="hlt">control</span> devices of municipal solid waste incinerators.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Takahashi, Fumitake; Kida, Akiko; Shimaoka, Takayuki</p> <p>2010-10-15</p> <p>Although representative removal efficiencies of gaseous <span class="hlt">mercury</span> for air pollution <span class="hlt">control</span> devices (APCDs) are important to prepare more reliable atmospheric emission inventories of <span class="hlt">mercury</span>, they have been still uncertain because they depend sensitively on many factors like the type of APCDs, gas temperature, and <span class="hlt">mercury</span> speciation. In this study, representative removal efficiencies of gaseous <span class="hlt">mercury</span> for several types of APCDs of municipal solid waste incineration (MSWI) were offered using a statistical method. 534 data of <span class="hlt">mercury</span> removal efficiencies for APCDs used in MSWI were collected. APCDs were categorized as fixed-bed absorber (FA), wet scrubber (WS), electrostatic precipitator (ESP), and fabric filter (FF), and their hybrid systems. Data series of all APCD types had Gaussian log-normality. The average removal efficiency with a 95% confidence interval for each APCD was estimated. The FA, WS, and FF with carbon and/or dry sorbent injection systems had 75% to 82% average removal efficiencies. On the other hand, the ESP with/without dry sorbent injection had lower removal efficiencies of up to 22%. The type of dry sorbent injection in the FF system, dry or semi-dry, did not make more than 1% difference to the removal efficiency. The injection of activated carbon and carbon-containing fly ash in the FF system made less than 3% difference. Estimation errors of removal efficiency were especially high for the ESP. The national average of removal efficiency of APCDs in Japanese MSWI plants was estimated on the basis of incineration capacity. Owing to the replacement of old APCDs for dioxin <span class="hlt">control</span>, the national average removal efficiency increased from 34.5% in 1991 to 92.5% in 2003. This resulted in an additional reduction of about 0.86Mg emission in 2003. Further study using the methodology in this study to other important emission sources like coal-fired power plants will contribute to better emission inventories. Copyright © 2010 Elsevier B.V. All rights</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20647427','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20647427"><span><span class="hlt">Mercury</span>'s complex exosphere: results from MESSENGER's third flyby.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Vervack, Ronald J; McClintock, William E; Killen, Rosemary M; Sprague, Ann L; Anderson, Brian J; Burger, Matthew H; Bradley, E Todd; Mouawad, Nelly; Solomon, Sean C; Izenberg, Noam R</p> <p>2010-08-06</p> <p>During MESSENGER's third flyby of <span class="hlt">Mercury</span>, the <span class="hlt">Mercury</span> Atmospheric and Surface Composition Spectrometer detected emission from ionized calcium concentrated 1 to 2 <span class="hlt">Mercury</span> radii tailward of the planet. This measurement provides evidence for tailward magnetospheric convection of photoions produced inside the magnetosphere. Observations of neutral sodium, calcium, and magnesium above the planet's north and south poles reveal altitude distributions that are distinct for each species. A two-component sodium distribution and markedly different magnesium distributions above the two poles are direct indications that multiple processes <span class="hlt">control</span> the distribution of even single species in <span class="hlt">Mercury</span>'s exosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/907884','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/907884"><span><span class="hlt">Mercury</span> Information Clearinghouse</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Chad A. Wocken; Michael J. Holmes; Dennis L. Laudal</p> <p>2006-03-31</p> <p>The Canadian Electricity Association (CEA) identified a need and contracted the Energy & Environmental Research Center (EERC) to create and maintain an information clearinghouse on global research and development activities related to <span class="hlt">mercury</span> emissions from coal-fired electric utilities. With the support of CEA, the Center for Air Toxic Metals{reg_sign} (CATM{reg_sign}) Affiliates, and the U.S. Department of Energy (DOE), the EERC developed comprehensive quarterly information updates that provide a detailed assessment of developments in the various areas of <span class="hlt">mercury</span> monitoring, <span class="hlt">control</span>, policy, and research. A total of eight topical reports were completed and are summarized and updated in this final CEAmore » quarterly report. The original quarterly reports can be viewed at the CEA Web site (www.ceamercuryprogram.ca). In addition to a comprehensive update of previous <span class="hlt">mercury</span>-related topics, a review of results from the CEA <span class="hlt">Mercury</span> Program is provided. Members of Canada's coal-fired electricity generation sector (ATCO Power, EPCOR, Manitoba Hydro, New Brunswick Power, Nova Scotia Power Inc., Ontario Power Generation, SaskPower, and TransAlta) and CEA, have compiled an extensive database of information from stack-, coal-, and ash-sampling activities. Data from this effort are also available at the CEA Web site and have provided critical information for establishing and reviewing a <span class="hlt">mercury</span> standard for Canada that is protective of environment and public health and is cost-effective. Specific goals outlined for the CEA <span class="hlt">mercury</span> program included the following: (1) Improve emission inventories and develop management options through an intensive 2-year coal-, ash-, and stack-sampling program; (2) Promote effective stack testing through the development of guidance material and the support of on-site training on the Ontario Hydro method for employees, government representatives, and contractors on an as-needed basis; (3) Strengthen laboratory analytical capabilities through</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70196079','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70196079"><span>Patterns and <span class="hlt">controls</span> of <span class="hlt">mercury</span> accumulation in sediments from three thermokarst lakes on the Arctic Coastal Plain of Alaska</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Burke, Samantha M.; Zimmerman, Christian E.; Branfireun, Brian A.; Koch, Joshua C.; Swanson, Heidi K.</p> <p>2018-01-01</p> <p>The biogeochemical cycle of <span class="hlt">mercury</span> will be influenced by climate change, particularly at higher latitudes. Investigations of historical <span class="hlt">mercury</span> accumulation in lake sediments inform future predictions as to how climate change might affect <span class="hlt">mercury</span> biogeochemistry; however, in regions with a paucity of data, such as the thermokarst-rich Arctic Coastal Plain of Alaska (ACP), the trajectory of <span class="hlt">mercury</span> accumulation in lake sediments is particularly uncertain. Sediment cores from three thermokarst lakes on the ACP were analyzed to understand changes in, and drivers of, Hg accumulation over the past ~ 100 years. <span class="hlt">Mercury</span> accumulation in two of the three lakes was variable and high over the past century (91.96 and 78.6 µg/m2/year), and largely <span class="hlt">controlled</span> by sedimentation rate. <span class="hlt">Mercury</span> accumulation in the third lake was lower (14.2 µg/m2/year), more temporally uniform, and was more strongly related to sediment Hg concentration than sedimentation rate. Sediment <span class="hlt">mercury</span> concentrations were quantitatively related to measures of sediment composition and VRS-inferred chlorophyll a, and sedimentation rates were related to various catchment characteristics. These results were compared to data from 37 previously studied Arctic and Alaskan lakes. Results from the meta-analysis indicate that thermokarst lakes have significantly higher and more variable Hg accumulation rates than non-thermokarst lakes, suggesting that certain properties (e.g., thermal erosion, thaw slumping, low hydraulic conductivity) likely make lakes prone to high and variable Hg accumulation rates. Differences and high variability in Hg accumulation among high latitude lakes highlight the complexity of predicting future climate-related change impacts on <span class="hlt">mercury</span> cycling in these environments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=104792&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=104792&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>PRELIMINARY ESTIMATES OF PERFORMANCE AND COST OF <span class="hlt">MERCURY</span> EMISSION <span class="hlt">CONTROL</span> TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS: AN UPDATE</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The paper presents estimates of performance levels and related costs associated with <span class="hlt">controlling</span> <span class="hlt">mercury</span> (Hg) emissions from coal-fired power plants using either powdered activated carbon (PAC) injection or multipollutant <span class="hlt">control</span> in which Hg capture is enhanced in existing and ne...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25257992','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25257992"><span>Identifying occupational and nonoccupational exposure to <span class="hlt">mercury</span> in dental personnel.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shirkhanloo, Hamid; Fallah Mehrjerdi, Mohammad Ali; Hassani, Hamid</p> <p>2017-03-04</p> <p>The objective of this study was to investigate the occupational and nonoccupational exposure to <span class="hlt">mercury</span> (Hg) vapor in dental personnel by examining the relationships between blood <span class="hlt">mercury</span>, urine <span class="hlt">mercury</span>, and their ratio with air <span class="hlt">mercury</span>. The method was performed on 50 occupational exposed and 50 unexposed <span class="hlt">controls</span> (25 men and 25 women). The <span class="hlt">mercury</span> concentrations in air and human biological samples were determined based on the National Institute for Occupational Safety and Health (NIOSH) method and standard method (SM) by a new mode of liquid-phase microextraction, respectively. The mean <span class="hlt">mercury</span> concentrations in urine (μg Hg 0 /g creatinine) and blood were significantly higher than <span class="hlt">control</span> group, respectively (19.41 ± 5.18 vs 2.15 ± 0.07 μg/g and 16.40 ± 4.97 vs 2.50 ± 0.02 μg/L) (p <.001). The relationships between <span class="hlt">mercury</span> concentration in blood/urine ratio (r = .380) with dental office air are new indicators for assessing occupational exposure in dental personnel.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63989&keyword=point+AND+balance&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63989&keyword=point+AND+balance&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>EVALUATION OF <span class="hlt">MERCURY</span> SPECIATION AT POWER PLANTS USING SCR AND SNCR NOX <span class="hlt">CONTROL</span> TECHNOLOGIES</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The paper describes the impact that selective catalytic reduction (SCR), selective noncatalytic reduction (SNCR), and flue gas-conditioning systems have on total <span class="hlt">mercury</span> emissions and on the speciation of <span class="hlt">mercury</span>. If SCR and/or SNCR systems enhance <span class="hlt">mercury</span> conversion/capture, the...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=105324&Lab=NRMRL&keyword=interest+AND+simple&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=105324&Lab=NRMRL&keyword=interest+AND+simple&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>AN ELECTROCHEMICAL SYSTEM FOR REMOVING AND RECOVERING ELEMENTAL <span class="hlt">MERCURY</span> FROM FLUE-STACK GASES</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>the impending EPA regulations on the <span class="hlt">control</span> of <span class="hlt">mercury</span> emissions from the flue stacks of coal-burning electric utilities has resulted in heightened interest in the development of advanced <span class="hlt">mercury</span> <span class="hlt">control</span> technologies such as sorbent injection and in-situ <span class="hlt">mercury</span> oxidation. Altho...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=psychological+AND+bulletin&pg=5&id=EJ850767','ERIC'); return false;" href="https://eric.ed.gov/?q=psychological+AND+bulletin&pg=5&id=EJ850767"><span>Sticky Plans: Inhibition and Binding during Serial-<span class="hlt">Task</span> <span class="hlt">Control</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mayr, Ulrich</p> <p>2009-01-01</p> <p>Recent evidence suggests substantial response-time costs associated with lag-2 repetitions of <span class="hlt">tasks</span> within explicitly <span class="hlt">controlled</span> <span class="hlt">task</span> sequences [Koch, I., Philipp, A. M., Gade, M. (2006). Chunking in <span class="hlt">task</span> sequences modulates <span class="hlt">task</span> inhibition. "Psychological Science," 17, 346-350; Schneider, D. W. (2007). <span class="hlt">Task</span>-set inhibition in chunked task…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19780012200','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19780012200"><span>Pilot-model analysis and simulation study of effect of <span class="hlt">control</span> <span class="hlt">task</span> desired <span class="hlt">control</span> response</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Adams, J. J.; Gera, J.; Jaudon, J. B.</p> <p>1978-01-01</p> <p>A pilot model analysis was performed that relates pilot <span class="hlt">control</span> compensation, pilot aircraft system response, and aircraft response characteristics for longitudinal <span class="hlt">control</span>. The results show that a higher aircraft short period frequency is required to achieve superior pilot aircraft system response in an altitude <span class="hlt">control</span> <span class="hlt">task</span> than is required in an attitude <span class="hlt">control</span> <span class="hlt">task</span>. These results were confirmed by a simulation study of target tracking. It was concluded that the pilot model analysis provides a theoretical basis for determining the effect of <span class="hlt">control</span> <span class="hlt">task</span> on pilot opinions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5886487','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5886487"><span>Human-centric predictive model of <span class="hlt">task</span> difficulty for human-in-the-loop <span class="hlt">control</span> <span class="hlt">tasks</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Majewicz Fey, Ann</p> <p>2018-01-01</p> <p>Quantitatively measuring the difficulty of a manipulation <span class="hlt">task</span> in human-in-the-loop <span class="hlt">control</span> systems is ill-defined. Currently, systems are typically evaluated through <span class="hlt">task</span>-specific performance measures and post-experiment user surveys; however, these methods do not capture the real-time experience of human users. In this study, we propose to analyze and predict the difficulty of a bivariate pointing <span class="hlt">task</span>, with a haptic device interface, using human-centric measurement data in terms of cognition, physical effort, and motion kinematics. Noninvasive sensors were used to record the multimodal response of human user for 14 subjects performing the <span class="hlt">task</span>. A data-driven approach for predicting <span class="hlt">task</span> difficulty was implemented based on several <span class="hlt">task</span>-independent metrics. We compare four possible models for predicting <span class="hlt">task</span> difficulty to evaluated the roles of the various types of metrics, including: (I) a movement time model, (II) a fusion model using both physiological and kinematic metrics, (III) a model only with kinematic metrics, and (IV) a model only with physiological metrics. The results show significant correlation between <span class="hlt">task</span> difficulty and the user sensorimotor response. The fusion model, integrating user physiology and motion kinematics, provided the best estimate of <span class="hlt">task</span> difficulty (R2 = 0.927), followed by a model using only kinematic metrics (R2 = 0.921). Both models were better predictors of <span class="hlt">task</span> difficulty than the movement time model (R2 = 0.847), derived from Fitt’s law, a well studied difficulty model for human psychomotor <span class="hlt">control</span>. PMID:29621301</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100023390','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100023390"><span><span class="hlt">Mercury</span> Toolset for Spatiotemporal Metadata</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Wilson, Bruce E.; Palanisamy, Giri; Devarakonda, Ranjeet; Rhyne, B. Timothy; Lindsley, Chris; Green, James</p> <p>2010-01-01</p> <p><span class="hlt">Mercury</span> (http://<span class="hlt">mercury</span>.ornl.gov) is a set of tools for federated harvesting, searching, and retrieving metadata, particularly spatiotemporal metadata. Version 3.0 of the <span class="hlt">Mercury</span> toolset provides orders of magnitude improvements in search speed, support for additional metadata formats, integration with Google Maps for spatial queries, facetted type search, support for RSS (Really Simple Syndication) delivery of search results, and enhanced customization to meet the needs of the multiple projects that use <span class="hlt">Mercury</span>. It provides a single portal to very quickly search for data and information contained in disparate data management systems, each of which may use different metadata formats. <span class="hlt">Mercury</span> harvests metadata and key data from contributing project servers distributed around the world and builds a centralized index. The search interfaces then allow the users to perform a variety of fielded, spatial, and temporal searches across these metadata sources. This centralized repository of metadata with distributed data sources provides extremely fast search results to the user, while allowing data providers to advertise the availability of their data and maintain complete <span class="hlt">control</span> and ownership of that data. <span class="hlt">Mercury</span> periodically (typically daily) harvests metadata sources through a collection of interfaces and re-indexes these metadata to provide extremely rapid search capabilities, even over collections with tens of millions of metadata records. A number of both graphical and application interfaces have been constructed within <span class="hlt">Mercury</span>, to enable both human users and other computer programs to perform queries. <span class="hlt">Mercury</span> was also designed to support multiple different projects, so that the particular fields that can be queried and used with search filters are easy to configure for each different project.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010gsfc.reptE...1D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010gsfc.reptE...1D"><span><span class="hlt">Mercury</span> Toolset for Spatiotemporal Metadata</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Devarakonda, Ranjeet; Palanisamy, Giri; Green, James; Wilson, Bruce; Rhyne, B. Timothy; Lindsley, Chris</p> <p>2010-06-01</p> <p><span class="hlt">Mercury</span> (http://<span class="hlt">mercury</span>.ornl.gov) is a set of tools for federated harvesting, searching, and retrieving metadata, particularly spatiotemporal metadata. Version 3.0 of the <span class="hlt">Mercury</span> toolset provides orders of magnitude improvements in search speed, support for additional metadata formats, integration with Google Maps for spatial queries, facetted type search, support for RSS (Really Simple Syndication) delivery of search results, and enhanced customization to meet the needs of the multiple projects that use <span class="hlt">Mercury</span>. It provides a single portal to very quickly search for data and information contained in disparate data management systems, each of which may use different metadata formats. <span class="hlt">Mercury</span> harvests metadata and key data from contributing project servers distributed around the world and builds a centralized index. The search interfaces then allow the users to perform a variety of fielded, spatial, and temporal searches across these metadata sources. This centralized repository of metadata with distributed data sources provides extremely fast search results to the user, while allowing data providers to advertise the availability of their data and maintain complete <span class="hlt">control</span> and ownership of that data. <span class="hlt">Mercury</span> periodically (typically daily)harvests metadata sources through a collection of interfaces and re-indexes these metadata to provide extremely rapid search capabilities, even over collections with tens of millions of metadata records. A number of both graphical and application interfaces have been constructed within <span class="hlt">Mercury</span>, to enable both human users and other computer programs to perform queries. <span class="hlt">Mercury</span> was also designed to support multiple different projects, so that the particular fields that can be queried and used with search filters are easy to configure for each different project.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010AGUFM.B23F0434B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010AGUFM.B23F0434B"><span>Geoecological <span class="hlt">controls</span> on net <span class="hlt">mercury</span> retention in northern peatlands</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bindler, R.; Rydberg, J.</p> <p>2010-12-01</p> <p>Peatlands, which receive much or all of their element inputs (e.g. nutrients or trace metals) via the atmosphere, are considered an ideal archive for studying past changes in <span class="hlt">mercury</span> (Hg) deposition. These archives potentially contain information not only on important anthropogenic contributions to the environment over the past few centuries, but also on the natural antecedent conditions over the past several millennia. However, the assumption that Hg accumulation rates in peat represent an absolute record of past atmospheric deposition has proved problematic. In on-going studies of Hg retention in northern peatlands (bogs and oligotrophic fens) we find that net Hg accumulation is influenced by a range of geoecological factors in addition to actual changes in atmospheric deposition. Factors that influence the interception and net retention of Hg include differences in vegetation and microtopography - both of which may enhance dry deposition, and properties and processes within the peat such as decomposition that might influence long-term retention. Wetness, too, may play an important role in net retention in the surface peat through increased evasive losses of Hg. Differences between Hg concentrations in vascular plants and mosses are well established (at our site: 5-15 ng/g for leaves/needles of cottongrass, heather, Labrador tea and pine; 15-<span class="hlt">45</span> ng/g for mosses Sphagnum centrale and S. rubellum), but we also measured significant differences between different mosses within the same plots (S. rubellum, 24±3 ng/g; S. centrale, 18±2 ng/g). Further differences in Hg concentrations occur for single moss species in different settings; for example, Hg concentrations in S. centrale in open Sphagnum-only plots relative to plots including a mixture of vascular plants that form a field-layer canopy are 18±2 and 32±6 ng/g, respectively. As a result, sampling sites consisting of both Sphagnum and vascular plants have long-term cumulative inventories of <span class="hlt">mercury</span> in the peat</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28169147','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28169147"><span>Single-<span class="hlt">task</span> and dual-<span class="hlt">task</span> tandem gait test performance after concussion.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Howell, David R; Osternig, Louis R; Chou, Li-Shan</p> <p>2017-07-01</p> <p>To compare single-<span class="hlt">task</span> and dual-<span class="hlt">task</span> tandem gait test performance between athletes after concussion with <span class="hlt">controls</span> on observer-timed, spatio-temporal, and center-of-mass (COM) balance <span class="hlt">control</span> measurements. Ten participants (19.0±5.5years) were prospectively identified and completed a tandem gait test protocol within 72h of concussion and again 1 week, 2 weeks, 1 month, and 2 months post-injury. Seven uninjured <span class="hlt">controls</span> (20.0±<span class="hlt">4.5</span>years) completed the same protocol in similar time increments. Tandem gait test trials were performed with (dual-<span class="hlt">task</span>) and without (single-<span class="hlt">task</span>) concurrently performing a cognitive test as whole-body motion analysis was performed. Outcome variables included test completion time, average tandem gait velocity, cadence, and whole-body COM frontal plane displacement. Concussion participants took significantly longer to complete the dual-<span class="hlt">task</span> tandem gait test than <span class="hlt">controls</span> throughout the first 2 weeks post-injury (mean time=16.4 [95% CI: 13.4-19.4] vs. 10.1 [95% CI: 6.4-13.7] seconds; p=0.03). Single-<span class="hlt">task</span> tandem gait times were significantly lower 72h post-injury (p=0.04). Dual-<span class="hlt">task</span> cadence was significantly lower for concussion participants than <span class="hlt">controls</span> (89.5 [95% CI: 68.6-110.4] vs. 127.0 [95% CI: 97.4-156.6] steps/minute; p=0.04). Moderately-high to high correlations between tandem gait test time and whole-body COM medial-lateral displacement were detected at each time point during dual-<span class="hlt">task</span> gait (r s =0.70-0.93; p=0.03-0.001). Adding a cognitive <span class="hlt">task</span> during the tandem gait test resulted in longer detectable deficits post-concussion compared to the traditional single-<span class="hlt">task</span> tandem gait test. As a clinical tool to assess dynamic motor function, tandem gait may assist with return to sport decisions after concussion. Copyright © 2017 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.H51E0807M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.H51E0807M"><span>Migration And Entrapment Of <span class="hlt">Mercury</span> In The Subsurface</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>M, D.; Nambi, I. M.</p> <p>2009-12-01</p> <p>Elemental <span class="hlt">mercury</span> is an immiscible liquid with high density and high surface tension. The movement of <span class="hlt">mercury</span> in the saturated subsurface region is therefore considered a case of two phase flow involving <span class="hlt">mercury</span> and water and is expected to be governed by gravity, viscous and capillary forces. Fundamental investigation into the migration and capillary entrapment of <span class="hlt">mercury</span> in the subsurface was done by <span class="hlt">controlled</span> laboratory capillary pressure saturation experiments using <span class="hlt">mercury</span> and water as non wetting and wetting fluid respectively. Residual <span class="hlt">mercury</span> saturation and van Genuchten’s capillary entrapment parameters were determined independently for different sizes of porous media. Based on the experimental data, theoretical investigations were done on the role of the three predominant forces and their influence on <span class="hlt">mercury</span> migration and entrapment. The effects of fluid density and interfacial tension and the influence of Capillary and Bond number on <span class="hlt">mercury</span> entrapment were analyzed with the help of similar capillary pressure - saturation experiments using Tetrachloroethylene (PCE)-water fluid pair. <span class="hlt">Mercury</span>-water systems exhibited a low residual saturation of 0.02 and 0.07 as compared to 0.16 and 0.27 for PCE-water systems. Less residual <span class="hlt">mercury</span> saturation, lack of apparent hysteresis in capillary pressure saturation curves and large variation in van Genuchten’s parameters 'α'(inverse of displacement pressure) and ‘n’ (pore size distribution index) for <span class="hlt">mercury</span>-water systems compared to PCE-water systems were observed. These anomalies between the two systems elucidate that the capillary trapping is equally dependent on the fluid characteristics especially for high density immiscible fluids. Gravity force nevertheless a predominant <span class="hlt">controlling</span> factor in the migration of highly dense <span class="hlt">mercury</span>, is counteracted by not less trivial capillary force which was 1.22x104 times higher than gravity force. The capillary forces thus surmount the gravity forces and cause</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/pages/biblio/1427551-xanes-study-elemental-mercury-oxidation-over-ruo2-tio2-selective-catalytic-reduction-catalysts-mercury-emissions-control','SCIGOV-DOEP'); return false;" href="https://www.osti.gov/pages/biblio/1427551-xanes-study-elemental-mercury-oxidation-over-ruo2-tio2-selective-catalytic-reduction-catalysts-mercury-emissions-control"><span>XANES study of elemental <span class="hlt">mercury</span> oxidation over RuO 2/TiO 2 and selective catalytic reduction catalysts for <span class="hlt">mercury</span> emissions <span class="hlt">control</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Liu, Zhouyang; Li, Can; Sriram, Vishnu; ...</p> <p>2016-07-25</p> <p>Linear combination fitting of the X-ray Absorption Near Edge Spectroscopy (XANES) was used to quantify oxidized <span class="hlt">mercury</span> species over RuO 2/TiO 2 and Selective Catalytic Reduction (SCR) catalysts under different simulated flue gas conditions. Halogen gases play a major role in <span class="hlt">mercury</span> oxidation. In the absence of halogen gas, elemental <span class="hlt">mercury</span> can react with sulfur that is contained in both the RuO2/TiO2 and SCR catalysts to form HgS and HgSO 4. In the presence of HCl or HBr gas, HgCl 2 or HgBr 2 is the main oxidized <span class="hlt">mercury</span> species. When both HCl and HBr gases are present, HgBr2 ismore » the preferred oxidation product and no HgCl 2 can be found. The formation of HgO and HgS cannot be neglected with or without halogen gas. Other simulated flue gas components such as NO, NH 3, SO 2 and CO 2 do not have significant effect on oxidized <span class="hlt">mercury</span> speciation when halogen gas is present.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003TrGeo...1..477T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003TrGeo...1..477T"><span><span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Taylor, G. J.; Scott, E. R. D.</p> <p>2003-12-01</p> <p><span class="hlt">Mercury</span> is an important part of the solar system puzzle, yet we know less about it than any other planet, except Pluto. <span class="hlt">Mercury</span> is the smallest of the terrestrial planets (0.05 Earth masses) and the closest to the Sun. Its relatively high density (5.4 g cm -3) indicates that it has a large metallic core (˜3/4 of the planet's radius) compared to its silicate mantle and crust. The existence of a magnetic field implies that the metallic core is still partly molten. The surface is heavily cratered like the highlands of the Moon, but some areas are smooth and less cratered, possibly like the lunar maria (but not as dark). Its surface composition, as explained in the next section, appears to be low in FeO (only ˜3 wt.%), which implies that either its crust is anorthositic (Jeanloz et al., 1995) or its mantle is similarly low in FeO ( Robinson and Taylor, 2001).The proximity of <span class="hlt">Mercury</span> to the Sun is particularly important. In one somewhat outmoded view of how the solar system formed, <span class="hlt">Mercury</span> was assembled in the hottest region close to the Sun so that virtually all of the iron was in the metallic state, rather than oxidized to FeO (e.g., Lewis, 1972, 1974). If correct, <span class="hlt">Mercury</span> ought to have relatively a low content of FeO. This hypothesis also predicts that <span class="hlt">Mercury</span> should have high concentrations of refractory elements, such as calcium, aluminum, and thorium, and low concentrations of volatile elements, such as sodium and potassium, compared to the other terrestrial planets.Alternative hypotheses tell a much more nomadic and dramatic story of <span class="hlt">Mercury</span>'s birth. In one alternative view, wandering planetesimals that might have come from as far away as Mars or the inner asteroid belt accreted to form <span class="hlt">Mercury</span> (Wetherill, 1994). This model predicts higher FeO and volatile elements than does the high-temperature model, and similar compositions among the terrestrial planets. The accretion process might have been accompanied by a monumental impact that stripped away much of the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1354663-integrated-systems-based-approach-mercury-research-technology-development','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1354663-integrated-systems-based-approach-mercury-research-technology-development"><span>An integrated systems-based approach to <span class="hlt">mercury</span> research and technology development</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Peterson, Mark J; Brooks, Scott C; Mathews, Teresa J</p> <p></p> <p> interdependencies between sources and processes in EFPC, no one <span class="hlt">task</span> or approach is likely to solve the <span class="hlt">mercury</span> problem in the creek, thus highlighting the importance of using an integrated, systems-based approach to develop remedial solutions.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16002132','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16002132"><span>Effect of iodine on <span class="hlt">mercury</span> concentrations in dental-unit wastewater.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Stone, Mark E; Kuehne, John C; Cohen, Mark E; Talbott, Jonathan L; Scott, John W</p> <p>2006-02-01</p> <p>This study was undertaken to determine whether iodine used to <span class="hlt">control</span> bacteria in dental unit waterlines could increase <span class="hlt">mercury</span> concentrations in dental wastewater. The study was conducted in four parts. Part 1. Solutions containing iodine in concentrations ranging from zero (<span class="hlt">control</span>) to 20 mg/L were mixed with ground and sieved dental amalgam and then allowed to equilibrate by settling. Cold vapor atomic absorption spectrometry was used to determine <span class="hlt">mercury</span> levels in the settled supernatants at 24 h and at 7 days. Part 2. Deionized water was pumped through an iodine-releasing water-treatment cartridge, collected, and mixed with ground and sieved dental amalgam. <span class="hlt">Mercury</span> levels in settled supernatants were measured at 24 h and at 7 days. Part 3. Iodine in water from two commercial iodine-releasing cartridges was measured using Inductively Couple Plasma Mass Spectrometry. Part 4. Baseline <span class="hlt">mercury</span> levels in settled supernatants from wastewater collected from two dental chairs were compared to samples taken from chairs equipped with iodine-releasing cartridges. Part 1. A linear correlation between iodine and <span class="hlt">mercury</span> concentration (r2=0.9167 and 0.9459, respectively, both P<0.001) was seen at both 24 h and 7 days. Part 2. Mean <span class="hlt">mercury</span> levels in 24h samples were 3.0 times higher than the <span class="hlt">controls</span> (0.2864 mg/L compared with 0.0939mg/L for the 24 h <span class="hlt">controls</span>). Mean <span class="hlt">mercury</span> levels in the 7-day samples were 5.9 times higher than the 7-day <span class="hlt">controls</span> (0.2048 mg/L compared with 0.0348 mg/L for the 7-day <span class="hlt">controls</span>). Part 3. The effluent from two iodine-releasing cartridges showed iodine concentrations averaging 3.2 mg/L (n=10, SD=0.8, range=2.5-4.6). Part 4. Data from the clinical study showed a statistically significant 2.5-fold increase in <span class="hlt">mercury</span> levels with iodine-containing samples compared to baseline (0.0853 mg/L, n=18, SD=0.0441 and 0.0345 mg/L, n=18, SD=0.0145, respectively; P<0.001). Data suggest that iodine can increase concentrations of dissolved <span class="hlt">mercury</span> in dental unit</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22552575','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22552575"><span>Reverse <span class="hlt">control</span> for humanoid robot <span class="hlt">task</span> recognition.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hak, Sovannara; Mansard, Nicolas; Stasse, Olivier; Laumond, Jean Paul</p> <p>2012-12-01</p> <p>Efficient methods to perform motion recognition have been developed using statistical tools. Those methods rely on primitive learning in a suitable space, for example, the latent space of the joint angle and/or adequate <span class="hlt">task</span> spaces. Learned primitives are often sequential: A motion is segmented according to the time axis. When working with a humanoid robot, a motion can be decomposed into parallel subtasks. For example, in a waiter scenario, the robot has to keep some plates horizontal with one of its arms while placing a plate on the table with its free hand. Recognition can thus not be limited to one <span class="hlt">task</span> per consecutive segment of time. The method presented in this paper takes advantage of the knowledge of what <span class="hlt">tasks</span> the robot is able to do and how the motion is generated from this set of known <span class="hlt">controllers</span>, to perform a reverse engineering of an observed motion. This analysis is intended to recognize parallel <span class="hlt">tasks</span> that have been used to generate a motion. The method relies on the <span class="hlt">task</span>-function formalism and the projection operation into the null space of a <span class="hlt">task</span> to decouple the <span class="hlt">controllers</span>. The approach is successfully applied on a real robot to disambiguate motion in different scenarios where two motions look similar but have different purposes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.atsdr.cdc.gov/mercury/','NIH-MEDLINEPLUS'); return false;" href="https://www.atsdr.cdc.gov/mercury/"><span><span class="hlt">Mercury</span> and Your Health</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... the Risk of Exposure to <span class="hlt">Mercury</span> Learn About <span class="hlt">Mercury</span> What is <span class="hlt">Mercury</span> What is Metallic <span class="hlt">mercury</span>? Toxicological Profile ToxFAQs <span class="hlt">Mercury</span> Resources CDC’s National Biomonitoring Program Factsheet on <span class="hlt">Mercury</span> ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009ssee.conf..400G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009ssee.conf..400G"><span><span class="hlt">Task</span> Delegation Based Access <span class="hlt">Control</span> Models for Workflow Systems</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gaaloul, Khaled; Charoy, François</p> <p></p> <p>e-Government organisations are facilitated and conducted using workflow management systems. Role-based access <span class="hlt">control</span> (RBAC) is recognised as an efficient access <span class="hlt">control</span> model for large organisations. The application of RBAC in workflow systems cannot, however, grant permissions to users dynamically while business processes are being executed. We currently observe a move away from predefined strict workflow modelling towards approaches supporting flexibility on the organisational level. One specific approach is that of <span class="hlt">task</span> delegation. <span class="hlt">Task</span> delegation is a mechanism that supports organisational flexibility, and ensures delegation of authority in access <span class="hlt">control</span> systems. In this paper, we propose a <span class="hlt">Task</span>-oriented Access <span class="hlt">Control</span> (TAC) model based on RBAC to address these requirements. We aim to reason about <span class="hlt">task</span> from organisational perspectives and resources perspectives to analyse and specify authorisation constraints. Moreover, we present a fine grained access <span class="hlt">control</span> protocol to support delegation based on the TAC model.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/002476.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/002476.htm"><span><span class="hlt">Mercury</span> poisoning</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... of the lungs Medicine to remove <span class="hlt">mercury</span> and heavy metals from the body INORGANIC <span class="hlt">MERCURY</span> For inorganic <span class="hlt">mercury</span> ... chap 98. Theobald JL, Mycyk MB. Iron and heavy metals. In: Walls RM, Hockberger RS, Gausche-Hill M, ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15648394','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15648394"><span>Investigation of selective catalytic reduction impact on <span class="hlt">mercury</span> speciation under simulated NOx emission <span class="hlt">control</span> conditions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Chun W; Srivastava, Ravi K; Ghorishi, S Behrooz; Hastings, Thomas W; Stevens, Frank M</p> <p>2004-12-01</p> <p>Selective catalytic reduction (SCR) technology increasingly is being applied for <span class="hlt">controlling</span> emissions of nitrogen oxides (NOx) from coal-fired boilers. Some recent field and pilot studies suggest that the operation of SCR could affect the chemical form of <span class="hlt">mercury</span> (Hg) in coal combustion flue gases. The speciation of Hg is an important factor influencing the <span class="hlt">control</span> and environmental fate of Hg emissions from coal combustion. The vanadium and titanium oxides, used commonly in the vanadia-titania SCR catalyst for catalytic NOx reduction, promote the formation of oxidized <span class="hlt">mercury</span> (Hg2+). The work reported in this paper focuses on the impact of SCR on elemental <span class="hlt">mercury</span> (Hg0) oxidation. Bench-scale experiments were conducted to investigate Hg0 oxidation in the presence of simulated coal combustion flue gases and under SCR reaction conditions. Flue gas mixtures with different concentrations of hydrogen chloride (HCl) and sulfur dioxide (SO2) for simulating the combustion of bituminous coals and subbituminous coals were tested in these experiments. The effects of HCl and SO2 in the flue gases on Hg0 oxidation under SCR reaction conditions were studied. It was observed that HCl is the most critical flue gas component that causes conversion of Hg0 to Hg2+ under SCR reaction conditions. The importance of HCl for Hg0 oxidation found in the present study provides the scientific basis for the apparent coal-type dependence observed for Hg0 oxidation occurring across the SCR reactors in the field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/circ/1967/0540/report.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/circ/1967/0540/report.pdf"><span>A simple <span class="hlt">mercury</span> vapor detector for geochemical prospecting</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Vaughn, William W.</p> <p>1967-01-01</p> <p>The detector utilizes a large-volume atomic-absorption technique for quantitative determinations of <span class="hlt">mercury</span> vapor thermally released from crushed rock. A quartz-enclosed noble-metal amalgamative stage, which is temperature <span class="hlt">controlled</span> and is actuated by a radio-frequency induction heater, selectively traps the <span class="hlt">mercury</span> and eliminates low-level contamination. As little as 1 part per billion of <span class="hlt">mercury</span> can be detected in a 1-gram sample in a 1-minute analytical period.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25781374','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25781374"><span>Soil geochemistry and digestive solubilization <span class="hlt">control</span> <span class="hlt">mercury</span> bioaccumulation in the earthworm Pheretima guillemi.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dang, Fei; Zhao, Jie; Greenfield, Ben K; Zhong, Huan; Wang, Yujun; Yang, Zhousheng; Zhou, Dongmei</p> <p>2015-07-15</p> <p><span class="hlt">Mercury</span> presents a potential risk to soil organisms, yet our understanding of <span class="hlt">mercury</span> bioaccumulation in soil dwelling organisms is limited. The influence of soil geochemistry and digestive processes on both methylmercury (MeHg) and total <span class="hlt">mercury</span> (THg) bioavailability to earthworms (Pheretima guillemi) was evaluated in this study. Earthworms were exposed to six <span class="hlt">mercury</span>-contaminated soils with geochemically contrasting properties for 36 days, and digestive fluid was concurrently collected to solubilize soil-associated <span class="hlt">mercury</span>. Bioaccumulation factors were 7.5-31.0 and 0.2-0.6 for MeHg and THg, respectively, and MeHg accounted for 17-58% of THg in earthworm. THg and MeHg measured in soils and earthworms were negatively associated with soil total organic carbon (TOC). Earthworm THg and MeHg also increased with increasing soil pH. The proportion of MeHg and THg released into the digestive fluid (digestive solubilizable <span class="hlt">mercury</span>, DSM) was 8.3-18.1% and 0.4-1.3%, respectively. The greater solubilization of MeHg by digestive fluid than CaCl2, together with a biokinetic model-based estimate of dietary MeHg uptake, indicated the importance of soil ingestion for MeHg bioaccumulation in earthworms. Copyright © 2015 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17888493','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17888493"><span><span class="hlt">Mercury</span> mass balance at a wastewater treatment plant employing sludge incineration with offgas <span class="hlt">mercury</span> <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Balogh, Steven J; Nollet, Yabing H</p> <p>2008-01-15</p> <p>Efforts to reduce the deliberate use of <span class="hlt">mercury</span> (Hg) in modern industrialized societies have been largely successful, but the minimization and <span class="hlt">control</span> of Hg in waste streams are of continuing importance. Municipal wastewater treatment plants are collection points for domestic, commercial, and industrial wastewaters, and Hg removal during wastewater treatment is essential for protecting receiving waters. Subsequent <span class="hlt">control</span> of the Hg removed is also necessary to preclude environmental impacts. We present here a mass balance for Hg at a large metropolitan wastewater treatment plant that has recently been upgraded to provide for greater <span class="hlt">control</span> of the Hg entering the plant. The upgrade included a new fluidized bed sludge incineration facility equipped with activated carbon addition and baghouse carbon capture for the removal of Hg from the incinerator offgas. Our results show that Hg discharges to air and water from the plant represented less than 5% of the mass of Hg entering the plant, while the remaining Hg was captured in the ash/carbon residual stream exiting the new incineration process. Sub-optimum baghouse operation resulted in some of the Hg escaping collection there and accumulating with the ash/carbon particulate matter in the secondary treatment tanks. Overall, the treatment process is effective in removing Hg from wastewater and sequestering it in a <span class="hlt">controllable</span> stream for secure disposal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20070021589','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20070021589"><span>The Case against <span class="hlt">Mercury</span> as the Angrite Parent Body (APB)</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hutson, M. L.; Ruzicka, A. M.; Mittlefehldt, D. W.</p> <p>2007-01-01</p> <p>Angrites are not plausibly from <span class="hlt">Mercury</span> based on their high FeO contents and ancient ages (e.g., [1]). Rather, the early crystallization ages of angrites argues for a small asteroidal-sized parent body for these meteorites (e.g., [2]). Despite this, recently it has been proposed that <span class="hlt">Mercury</span> is the APB [3, 4, 5, 6]. Preserved corona and symplectite textures and the presence of 120 triple junctions in NWA 2999 have been cited as requiring a planetary origin [3, 4], with the symplectites in NWA 2999 resulting from rapid decompression during uplift via thrust faults on <span class="hlt">Mercury</span> [4], and the coronas during subsequent cooling at low pressure. Glasses along grain boundaries and exsolution lamellae possibly indicative of rapid melting and cooling in NWA 4950 are cited as evidence of rapid decompression [6]. To explain the discrepancy between spectral observations of the Mercurian surface and the high FeO contents in angrites, an early (<span class="hlt">4.5</span> Ga), collisionally-stripped FeO-rich basaltic surface has been suggested for <span class="hlt">Mercury</span> [5, 6].</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940026055','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940026055"><span>Object-based <span class="hlt">task</span>-level <span class="hlt">control</span>: A hierarchical <span class="hlt">control</span> architecture for remote operation of space robots</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stevens, H. D.; Miles, E. S.; Rock, S. J.; Cannon, R. H.</p> <p>1994-01-01</p> <p>Expanding man's presence in space requires capable, dexterous robots capable of being <span class="hlt">controlled</span> from the Earth. Traditional 'hand-in-glove' <span class="hlt">control</span> paradigms require the human operator to directly <span class="hlt">control</span> virtually every aspect of the robot's operation. While the human provides excellent judgment and perception, human interaction is limited by low bandwidth, delayed communications. These delays make 'hand-in-glove' operation from Earth impractical. In order to alleviate many of the problems inherent to remote operation, Stanford University's Aerospace Robotics Laboratory (ARL) has developed the Object-Based <span class="hlt">Task</span>-Level <span class="hlt">Control</span> architecture. Object-Based <span class="hlt">Task</span>-Level <span class="hlt">Control</span> (OBTLC) removes the burden of teleoperation from the human operator and enables execution of <span class="hlt">tasks</span> not possible with current techniques. OBTLC is a hierarchical approach to <span class="hlt">control</span> where the human operator is able to specify high-level, object-related <span class="hlt">tasks</span> through an intuitive graphical user interface. Infrequent <span class="hlt">task</span>-level command replace constant joystick operations, eliminating communications bandwidth and time delay problems. The details of robot <span class="hlt">control</span> and <span class="hlt">task</span> execution are handled entirely by the robot and computer <span class="hlt">control</span> system. The ARL has implemented the OBTLC architecture on a set of Free-Flying Space Robots. The capability of the OBTLC architecture has been demonstrated by <span class="hlt">controlling</span> the ARL Free-Flying Space Robots from NASA Ames Research Center.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012SPIE.8389E..05P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012SPIE.8389E..05P"><span><span class="hlt">Tasking</span> and sharing sensing assets using <span class="hlt">controlled</span> natural language</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Preece, Alun; Pizzocaro, Diego; Braines, David; Mott, David</p> <p>2012-06-01</p> <p>We introduce an approach to representing intelligence, surveillance, and reconnaissance (ISR) <span class="hlt">tasks</span> at a relatively high level in <span class="hlt">controlled</span> natural language. We demonstrate that this facilitates both human interpretation and machine processing of <span class="hlt">tasks</span>. More specically, it allows the automatic assignment of sensing assets to <span class="hlt">tasks</span>, and the informed sharing of <span class="hlt">tasks</span> between collaborating users in a coalition environment. To enable automatic matching of sensor types to <span class="hlt">tasks</span>, we created a machine-processable knowledge representation based on the Military Missions and Means Framework (MMF), and implemented a semantic reasoner to match <span class="hlt">task</span> types to sensor types. We combined this mechanism with a sensor-<span class="hlt">task</span> assignment procedure based on a well-known distributed protocol for resource allocation. In this paper, we re-formulate the MMF ontology in <span class="hlt">Controlled</span> English (CE), a type of <span class="hlt">controlled</span> natural language designed to be readable by a native English speaker whilst representing information in a structured, unambiguous form to facilitate machine processing. We show how CE can be used to describe both ISR <span class="hlt">tasks</span> (for example, detection, localization, or identication of particular kinds of object) and sensing assets (for example, acoustic, visual, or seismic sensors, mounted on motes or unmanned vehicles). We show how these representations enable an automatic sensor-<span class="hlt">task</span> assignment process. Where a group of users are cooperating in a coalition, we show how CE <span class="hlt">task</span> summaries give users in the eld a high-level picture of ISR coverage of an area of interest. This allows them to make ecient use of sensing resources by sharing <span class="hlt">tasks</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=219113&Lab=NRMRL&keyword=plants+AND+used+AND+reduce+AND+air+AND+pollution&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=219113&Lab=NRMRL&keyword=plants+AND+used+AND+reduce+AND+air+AND+pollution&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">Control</span> of <span class="hlt">mercury</span> emissions from coal fired electric uitlity boilers: An update</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Coal-fired power plants in the U.S. are known to be the major anthropogenic source of domestic <span class="hlt">mercury</span> emissions. The Environmental Protection Agency (EPA) has recently proposed to reduce emissions of <span class="hlt">mercury</span> from these plants. In March 2005, EPA plans to promulgate final regulat...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26620868','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26620868"><span>Removal of <span class="hlt">mercury</span> by adsorption: a review.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yu, Jin-Gang; Yue, Bao-Yu; Wu, Xiong-Wei; Liu, Qi; Jiao, Fei-Peng; Jiang, Xin-Yu; Chen, Xiao-Qing</p> <p>2016-03-01</p> <p>Due to natural and production activities, <span class="hlt">mercury</span> contamination has become one of the major environmental problems over the world. <span class="hlt">Mercury</span> contamination is a serious threat to human health. Among the existing technologies available for <span class="hlt">mercury</span> pollution <span class="hlt">control</span>, the adsorption process can get excellent separation effects and has been further studied. This review is attempted to cover a wide range of adsorbents that were developed for the removal of <span class="hlt">mercury</span> from the year 2011. Various adsorbents, including the latest adsorbents, are presented along with highlighting and discussing the key advancements on their preparation, modification technologies, and strategies. By comparing their adsorption capacities, it is evident from the literature survey that some adsorbents have shown excellent potential for the removal of <span class="hlt">mercury</span>. However, there is still a need to develop novel, efficient adsorbents with low cost, high stability, and easy production and manufacture for practical utility.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018Chaos..28d5105K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018Chaos..28d5105K"><span><span class="hlt">Control</span>, synchronization, and enhanced reliability of aperiodic oscillations in the <span class="hlt">Mercury</span> Beating Heart system</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kumar, Pawan; Parmananda, P.</p> <p>2018-04-01</p> <p>Experiments involving the <span class="hlt">Mercury</span> Beating Heart (MBH) oscillator, exhibiting irregular (aperiodic) dynamics, are performed. In the first set of experiments, <span class="hlt">control</span> over irregular dynamics of the MBH oscillator was obtained via a superimposed periodic voltage signal. These irregular (aperiodic) dynamics were recovered once the <span class="hlt">control</span> was switched off. Subsequently, two MBH oscillators were coupled to attain synchronization of their aperiodic oscillations. Finally, two uncoupled MBH oscillators were subjected, repeatedly, to a common stochastic forcing, resulting in an enhancement of their mutual phase correlation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28501632','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28501632"><span>High levels of maternally transferred <span class="hlt">mercury</span> disrupt magnetic responses of snapping turtle hatchlings (Chelydra serpentina).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Landler, Lukas; Painter, Michael S; Coe, Brittney Hopkins; Youmans, Paul W; Hopkins, William A; Phillips, John B</p> <p>2017-09-01</p> <p>The Earth's magnetic field is involved in spatial behaviours ranging from long-distance migration to non-goal directed behaviours, such as spontaneous magnetic alignment (SMA). <span class="hlt">Mercury</span> is a harmful pollutant most often generated from anthropogenic sources that can bio-accumulate in animal tissue over a lifetime. We compared SMA of hatchling snapping turtles from mothers captured at reference (i.e., low <span class="hlt">mercury</span>) and <span class="hlt">mercury</span> contaminated sites. Reference turtles showed radio frequency-dependent SMA along the north-south axis, consistent with previous studies of SMA, while turtles with high levels of maternally inherited <span class="hlt">mercury</span> failed to show consistent magnetic alignment. In contrast, there was no difference between reference and <span class="hlt">mercury</span> exposed turtles on standard performance measures. The magnetic field plays an important role in animal orientation behaviour and may also help to integrate spatial information from a variety of sensory modalities. As a consequence, <span class="hlt">mercury</span> may compromise the performance of turtles in a wide variety of spatial <span class="hlt">tasks</span>. Future research is needed to determine the threshold for <span class="hlt">mercury</span> effects on snapping turtles, whether <span class="hlt">mercury</span> exposure compromises spatial behaviour of adult turtles, and whether <span class="hlt">mercury</span> has a direct effect on the magnetoreception mechanism(s) that mediate SMA or a more general effect on the nervous system. Copyright © 2017 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2755212','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2755212"><span><span class="hlt">Mercury</span> in traditional medicines: Is cinnabar toxicologically similar to common <span class="hlt">mercurials</span>?</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Liu, Jie; Shi, Jing-Zheng; Yu, Li-Mei; Goyer, Robert A.; Waalkes, Michael P.</p> <p>2009-01-01</p> <p><span class="hlt">Mercury</span> is a major toxic metal ranking top in the Toxic Substances List. Cinnabar (contains <span class="hlt">mercury</span> sulfide) has been used in traditional medicines for thousands years as an ingredient in various remedies, and 40 cinnabar-containing traditional medicines are still used today. Little is known about toxicology profiles or toxicokinetics of cinnabar and cinnabar-containing traditional medicines, and the high <span class="hlt">mercury</span> content in these Chinese medicines raises justifiably escalations of public concern. This minireview searched the available database of cinnabar, compared cinnabar with common <span class="hlt">mercurials</span>, such as <span class="hlt">mercury</span> vapor, inorganic <span class="hlt">mercury</span>, and organic <span class="hlt">mercury</span>, and discusses differences in their bioavailability, disposition, and toxicity. The analysis showed that cinnabar is insoluble and poorly absorbed from the gastrointestinal tract. Absorbed <span class="hlt">mercury</span> from cinnabar is mainly accumulated in kidney, resembling the disposition pattern of inorganic <span class="hlt">mercury</span>. Heating cinnabar results in release of <span class="hlt">mercury</span> vapor, which in turn can produce toxicity similar to inhalation of these vapors. The doses of cinnabar required to produce neurotoxicity are thousands 1000 times higher than methyl <span class="hlt">mercury</span>. Following long-term use of cinnabar, renal dysfunction may occur. Dimercaprol and succimer are effective chelation therapies for general <span class="hlt">mercury</span> intoxication including cinnabar. Pharmacology studies of cinnabar suggest sedative and hypnotic effects, but the therapeutic basis of cinnabar is still not clear. In summary, cinnabar is chemically inert with a relatively low toxic potential when taken orally. In risk assessment, cinnabar is less toxic than many other forms of <span class="hlt">mercury</span>, but the rationale for its inclusion in traditional Chinese medicines remains to be fully justified. PMID:18445765</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20150010116','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20150010116"><span>Impact Vaporization as a Possible Source of <span class="hlt">Mercury</span>'s Calcium Exosphere</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Killen, Rosemary M.; Hahn, Joseph M.</p> <p>2015-01-01</p> <p><span class="hlt">Mercury</span>'s calcium exosphere varies in a periodic way with that planet's true anomaly. We show that this pattern can be explained by impact vaporization from interplanetary dust with variations being due to <span class="hlt">Mercury</span>'s radial and vertical excursions through an interplanetary dust disk having an inclination within 5 degrees of the plane of <span class="hlt">Mercury</span>'s orbit. Both a highly inclined dust disk and a two-disk model (where the two disks have a mutual inclination) fail to reproduce the observed variation in calcium exospheric abundance with <span class="hlt">Mercury</span> true anomaly angle. However, an additional source of impacting dust beyond the nominal dust disk is required near <span class="hlt">Mercury</span>'s true anomaly (?) 25deg +/-5deg. This is close to but not coincident with <span class="hlt">Mercury</span>'s true anomaly (?=<span class="hlt">45</span>deg) when it crosses comet 2P/Encke's present day orbital plane. Interestingly, the Taurid meteor storms at Earth, which are also due to Comet Encke, are observed to occur when Earth's true anomaly is +/-20 or so degrees before and after the position where Earth and Encke orbital planes cross. The lack of exact correspondence with the present day orbit of Encke may indicate the width of the potential stream along <span class="hlt">Mercury</span>'s orbit or a previous cometary orbit. The extreme energy of the escaping calcium, estimated to have a temperature greater than 50000 K if the source is thermal, cannot be due to the impact process itself but must be imparted by an additional mechanism such as dissociation of a calcium-bearing molecule or ionization followed by recombination.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19900016230','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19900016230"><span>A <span class="hlt">task</span> <span class="hlt">control</span> architecture for autonomous robots</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Simmons, Reid; Mitchell, Tom</p> <p>1990-01-01</p> <p>An architecture is presented for <span class="hlt">controlling</span> robots that have multiple <span class="hlt">tasks</span>, operate in dynamic domains, and require a fair degree of autonomy. The architecture is built on several layers of functionality, including a distributed communication layer, a behavior layer for querying sensors, expanding goals, and executing commands, and a <span class="hlt">task</span> level for managing the temporal aspects of planning and achieving goals, coordinating <span class="hlt">tasks</span>, allocating resources, monitoring, and recovering from errors. Application to a legged planetary rover and an indoor mobile manipulator is described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27908422','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27908422"><span>Toenail <span class="hlt">mercury</span> and dyslipidemia: Interaction with selenium.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Park, Kyong; Seo, Eunmin</p> <p>2017-01-01</p> <p>Although compelling evidences from in vivo and in vitro studies exist, limited studies have examined the association between chronic <span class="hlt">mercury</span> exposure and dyslipidemia. Particularly, data are sparse regarding the influence of selenium on this association of <span class="hlt">mercury</span> with dyslipidemia in humans. The purpose of the current study was to examine the associations of toenail <span class="hlt">mercury</span> with dyslipidemia and its components, and to examine whether selenium in toenails modifies these associations. We performed cross-sectional analyses using baseline data from a cohort in the Yeungnam area in South Korea, including 232 men and 269 women. Toenail <span class="hlt">mercury</span> and selenium concentrations were quantified using neutron activation analysis, and fasting serum lipid measurements were obtained through the medical examination. Odds ratios of the prevalent hypercholesterolemia, hyper-LDL-cholesterolemia, hypo-HDL-cholesterolemia, hypertriglyceridemia, and dyslipidemia in correlation with <span class="hlt">mercury</span> levels were calculated using multivariable logistic regression. The mean levels of toenail <span class="hlt">mercury</span> were 0.47μg/g for men and 0.34μg/g for women. After adjustment for multiple confounding variables, participants in the highest tertile of toenail <span class="hlt">mercury</span> levels had 4.08 (95% CI 1.09-15.32, p for trend=0.02) times higher risk of hyper-LDL-cholesterolemia, and 2.24 (95% CI 1.15-4.37, p for trend=0.004) times higher risk of dyslipidemia than those in the lowest tertile. Selenium is a significant effect-modifier for these associations; the highest tertile of toenail <span class="hlt">mercury</span> were significantly associated with a higher risk of hypercholesterolemia (OR 5.25, 95% CI 1.04-26.38) and dyslipidemia (OR 2.98, 95% CI 1.16-7.66) compared to the lowest tertile at toenail selenium levels ≤0.685μg/g, while these associations became weak and non-significant, showing OR 0.98 and 95% CI 0.25-3.80 for hypercholesterolemia and OR 1.99 and 95% CI 0.73-5.<span class="hlt">45</span> for dyslipidemia at toenail selenium levels >0.685μg/g. We</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6382004-content-chemical-form-mercury-selenium-lake-ontario-salmon-trout','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6382004-content-chemical-form-mercury-selenium-lake-ontario-salmon-trout"><span>Content and chemical form of <span class="hlt">mercury</span> and selenium in Lake Ontario salmon and trout</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Cappon, C.J.</p> <p>1984-01-01</p> <p>The content and chemical form of <span class="hlt">mercury</span> and selenium were determined in the edible tissue of salmon (coho, chinook) and trout (lake, brown) taken offshore from Lake Ontario near Rochester, New York. For all species, total <span class="hlt">mercury</span> content ranged from 0.3 to 0.8 micro g/g (fresh-weight), which is similar to concentrations commonly found in canned tuna. Most of the total <span class="hlt">mercury</span> (63 to 79%) was present as methylmercury, the remainder being divalent inorganic <span class="hlt">mercury</span>. For all species, 6 to <span class="hlt">45</span>% of the total selenium content was present as selenate (SeVI), the remainder being selenite (SeIV) and selenide (SEII). On amore » molar basis, total selenium content usually exceeded that of total <span class="hlt">mercury</span>. Samples of smoked and unsmoked brown trout fillets were also examined. Based on the results of this study there is no immediate human health hazard from <span class="hlt">mercury</span> and selenium. However, there is a need to report specific forms of these metals in Lake Ontario salmonid fish so that elevated concentrations can be better evaluated. 42 references, 1 figure, 4 tables.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/833504','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/833504"><span>Phytoremediation of Ionic and Methyl <span class="hlt">Mercury</span> Pollution</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Meagher, Richard B.</p> <p></p> <p>Our long-term objective is to enable highly productive plant species to extract, resist, detoxify, and/or sequester toxic organic and heavy metal pollutants by applying scientific strategies and technologies from a rapidly developing field called phytoremediation. The phytoremediation of toxic elemental and organic pollutants employs a variety of different approaches (Meagher, 2000). Our current specific objectives are to use transgenic plants to <span class="hlt">control</span> the chemical species, electrochemical state, transport, and aboveground binding of <span class="hlt">mercury</span> to (a) prevent methylmercury from entering the food-chain, (b) remove <span class="hlt">mercury</span> from polluted sites, and (c) hyperaccumulate <span class="hlt">mercury</span> in aboveground tissues for later harvest and waste disposal.more » Various parts of this strategy are being critically tested by examining different genes in model plants and field species and comparing the results to <span class="hlt">control</span> plants, as we reviewed previously (Meagher et al., 2000; Rugh et al., 2000). A positive spin-off from this work on <span class="hlt">mercury</span> has been a strategy for the phytoremediation of arsenic (Dhankher et al., 2002) and cadmium (Dhankher et al., 2003).« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3257869','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3257869"><span>Qualitative Differences between Bilingual Language <span class="hlt">Control</span> and Executive <span class="hlt">Control</span>: Evidence from <span class="hlt">Task</span>-Switching</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Calabria, Marco; Hernández, Mireia; Branzi, Francesca M.; Costa, Albert</p> <p>2012-01-01</p> <p>Previous research has shown that highly proficient bilinguals have comparable switch costs in both directions when they switch between languages (L1 and L2), the so-called “symmetrical switch cost” effect. Interestingly, the same symmetry is also present when they switch between L1 and a much weaker L3. These findings suggest that highly proficient bilinguals develop a language <span class="hlt">control</span> system that seems to be insensitive to language proficiency. In the present study, we explore whether the pattern of symmetrical switch costs in language switching <span class="hlt">tasks</span> generalizes to a non-linguistic switching <span class="hlt">task</span> in the same group of highly proficient bilinguals. The end goal of this is to assess whether bilingual language <span class="hlt">control</span> (bLC) can be considered as subsidiary to domain-general executive <span class="hlt">control</span> (EC). We tested highly proficient Catalan–Spanish bilinguals both in a linguistic switching <span class="hlt">task</span> and in a non-linguistic switching <span class="hlt">task</span>. In the linguistic <span class="hlt">task</span>, participants named pictures in L1 and L2 (Experiment 1) or L3 (Experiment 2) depending on a cue presented with the picture (a flag). In the non-linguistic <span class="hlt">task</span>, the same participants had to switch between two card sorting rule-sets (color and shape). Overall, participants showed symmetrical switch costs in the linguistic switching <span class="hlt">task</span>, but not in the non-linguistic switching <span class="hlt">task</span>. In a further analysis, we observed that in the linguistic switching <span class="hlt">task</span> the asymmetry of the switch costs changed across blocks, while in the non-linguistic switching <span class="hlt">task</span> an asymmetrical switch cost was observed throughout the <span class="hlt">task</span>. The observation of different patterns of switch costs in the linguistic and the non-linguistic switching <span class="hlt">tasks</span> suggest that the bLC system is not completely subsidiary to the domain-general EC system. PMID:22275905</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29802447','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29802447"><span>Increased cognitive <span class="hlt">control</span> after <span class="hlt">task</span> conflict? Investigating the N-3 effect in <span class="hlt">task</span> switching.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schuch, Stefanie; Grange, James A</p> <p>2018-05-25</p> <p><span class="hlt">Task</span> inhibition is considered to facilitate switching to a new <span class="hlt">task</span> and is assumed to decay slowly over time. Hence, more persisting inhibition needs to be overcome when returning to a <span class="hlt">task</span> after one intermediary trial (ABA <span class="hlt">task</span> sequence) than when returning after two or more intermediary trials (CBA <span class="hlt">task</span> sequence). Schuch and Grange (J Exp Psychol Learn Mem Cogn 41:760-767, 2015) put forward the hypothesis that there is higher <span class="hlt">task</span> conflict in ABA than CBA sequences, leading to increased cognitive <span class="hlt">control</span> in the subsequent trial. They provided evidence that performance is better in trials following ABA than following CBA <span class="hlt">task</span> sequences. Here, this effect of the previous <span class="hlt">task</span> sequence ("N-3 effect") is further investigated by varying the cue-stimulus interval (CSI), allowing for short (100 ms) or long (900 ms) preparation time for the upcoming <span class="hlt">task</span>. If increased cognitive <span class="hlt">control</span> after ABA involves a better preparation for the upcoming <span class="hlt">task</span>, the N-3 effect should be larger with long than short CSI. The results clearly show that this is not the case. In Experiment 1, the N-3 effect was smaller with long than short CSI; in Experiment 2, the N-3 effect was not affected by CSI. Diffusion model analysis confirmed previous results in the literature (regarding the effect of CSI and of the ABA-CBA difference); however, the N-3 effect was not unequivocally associated with any of the diffusion model parameters. In exploratory analysis, we also tested the alternative hypothesis that the N-3 effect involves more effective <span class="hlt">task</span> shielding, which would be reflected in reduced congruency effects in trials following ABA, relative to trials following CBA; congruency effects did not differ between these conditions. Taken together, we can rule out two potential explanations of the N-3 effect: Neither is this effect due to enhanced <span class="hlt">task</span> preparation, nor to more effective <span class="hlt">task</span> shielding.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19860023515','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19860023515"><span>The effects of voice and manual <span class="hlt">control</span> mode on dual <span class="hlt">task</span> performance</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Wickens, C. D.; Zenyuh, J.; Culp, V.; Marshak, W.</p> <p>1986-01-01</p> <p>Two fundamental principles of human performance, compatibility and resource competition, are combined with two structural dichotomies in the human information processing system, manual versus voice output, and left versus right cerebral hemisphere, in order to predict the optimum combination of voice and manual <span class="hlt">control</span> with either hand, for time-sharing performance of a dicrete and continuous <span class="hlt">task</span>. Eight right handed male subjected performed a discrete first-order tracking <span class="hlt">task</span>, time-shared with an auditorily presented Sternberg Memory Search <span class="hlt">Task</span>. Each <span class="hlt">task</span> could be <span class="hlt">controlled</span> by voice, or by the left or right hand, in all possible combinations except for a dual voice mode. When performance was analyzed in terms of a dual-<span class="hlt">task</span> decrement from single <span class="hlt">task</span> <span class="hlt">control</span> conditions, the following variables influenced time-sharing efficiency in diminishing order of magnitude, (1) the modality of <span class="hlt">control</span>, (discrete manual <span class="hlt">control</span> of tracking was superior to discrete voice <span class="hlt">control</span> of tracking and the converse was true with the memory search <span class="hlt">task</span>), (2) response competition, (performance was degraded when both <span class="hlt">tasks</span> were responded manually), (3) hemispheric competition, (performance degraded whenever two <span class="hlt">tasks</span> were <span class="hlt">controlled</span> by the left hemisphere) (i.e., voice or right handed <span class="hlt">control</span>). The results confirm the value of predictive models invoice <span class="hlt">control</span> implementation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63260&keyword=understanding+AND+human+AND+communication&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63260&keyword=understanding+AND+human+AND+communication&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">MERCURY</span> RESEARCH STRATEGY.</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The USEPA's ORD is pleased to announce the availability of its <span class="hlt">Mercury</span> Research Strategy. This strategy guides ORD's <span class="hlt">mercury</span> research program and covers the FY2001-2005 time frame. ORD will use it to prepare a multi-year <span class="hlt">mercury</span> research implementation plan in 2001. The <span class="hlt">Mercury</span> R...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24971708','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24971708"><span>Exploring adolescent cognitive <span class="hlt">control</span> in a combined interference switching <span class="hlt">task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mennigen, Eva; Rodehacke, Sarah; Müller, Kathrin U; Ripke, Stephan; Goschke, Thomas; Smolka, Michael N</p> <p>2014-08-01</p> <p>Cognitive <span class="hlt">control</span> enables individuals to flexibly adapt to environmental challenges. In the present functional magnetic resonance imaging (fMRI) study, we investigated 185 adolescents at the age of 14 with a combined response interference switching <span class="hlt">task</span> measuring behavioral responses (reaction time, RT and error rate, ER) and brain activity during the <span class="hlt">task</span>. This <span class="hlt">task</span> comprises two types of conflict which are co-occurring, namely, <span class="hlt">task</span> switching and stimulus-response incongruence. Data indicated that already in adolescents an overlapping cognitive <span class="hlt">control</span> network comprising the dorsal anterior cingulate cortex (dACC), dorsolateral prefrontal cortex (DLPFC), pre-supplementary motor area (preSMA) and posterior parietal cortex (PPC) is recruited by conflicts arising from <span class="hlt">task</span> switching and response incongruence. Furthermore our study revealed higher blood oxygenation level dependent (BOLD) responses elicited by incongruent stimuli in participants with a pronounced incongruence effect, calculated as the RT difference between incongruent and congruent trials. No such correlation was observed for switch costs. Furthermore, increased activation of the default mode network (DMN) was only observed in congruent trials compared to incongruent trials, but not in <span class="hlt">task</span> repetition relative to <span class="hlt">task</span> switch trials. These findings suggest that even though the two processes of <span class="hlt">task</span> switching and response incongruence share a common cognitive <span class="hlt">control</span> network they might be processed differentially within the cognitive <span class="hlt">control</span> network. Results are discussed in the context of a novel hypothesis concerning antagonistic relations between the DMN and the cognitive <span class="hlt">control</span> network. Copyright © 2014 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AtmEn..45..605Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AtmEn..45..605Z"><span>Emissions of <span class="hlt">mercury</span> from the power sector in Poland</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zyśk, J.; Wyrwa, A.; Pluta, M.</p> <p>2011-01-01</p> <p>Poland belongs to the European Union countries with the highest <span class="hlt">mercury</span> emissions. This is mainly related to coal combustion. This paper presents estimates of <span class="hlt">mercury</span> emissions from power sector in Poland. In this work, the bottom-up approach was applied and over 160 emission point sources were analysed. For each, the characteristics of the whole technological chain starting from fuel quality, boiler type as well as emission <span class="hlt">controls</span> were taken into account. Our results show that emissions of <span class="hlt">mercury</span> from brown coal power plants in 2005 were nearly four times greater than those of hard coal power plants. These estimates differ significantly from national statistics and some possible reasons are discussed. For the first time total <span class="hlt">mercury</span> emissions from the Polish power sector were differentiated into its main atmospheric forms: gaseous elemental (GEM), reactive gaseous (RGM) and particulate-bound <span class="hlt">mercury</span>. Information on emission source location and the likely vertical distribution of <span class="hlt">mercury</span> emissions, which can be used in modelling of atmospheric dispersion of <span class="hlt">mercury</span> is also provided.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/966359','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/966359"><span>Enhancing Carbon Reactivity in <span class="hlt">Mercury</span> <span class="hlt">Control</span> in Lignite-Fired Systems</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Chad Wocken; Michael Holmes; John Pavlish</p> <p>2008-06-30</p> <p>This project was awarded through the U.S. Department of Energy (DOE) National Energy Technology Laboratory Program Solicitation DE-PS26-03NT41718-01. The Energy & Environmental Research Center (EERC) led a consortium-based effort to resolve <span class="hlt">mercury</span> (Hg) <span class="hlt">control</span> issues facing the lignite industry. The EERC team-the Electric Power Research Institute (EPRI); the URS Corporation; the Babcock & Wilcox Company; ADA-ES; Apogee; Basin Electric Power Cooperative; Otter Tail Power Company; Great River Energy; Texas Utilities; Montana-Dakota Utilities Co.; Minnkota Power Cooperative, Inc.; BNI Coal Ltd.; Dakota Westmoreland Corporation; the North American Coal Corporation; SaskPower; and the North Dakota Industrial Commission-demonstrated technologies that substantially enhanced themore » effectiveness of carbon sorbents to remove Hg from western fuel combustion gases and achieve a high level ({ge} 55% Hg removal) of cost-effective <span class="hlt">control</span>. The results of this effort are applicable to virtually all utilities burning lignite and subbituminous coals in the United States and Canada. The enhancement processes were previously proven in pilot-scale and limited full-scale tests. Additional optimization testing continues on these enhancements. These four units included three lignite-fired units: Leland Olds Station Unit 1 (LOS1) and Stanton Station Unit 10 (SS10) near Stanton and Antelope Valley Station Unit 1 (AVS1) near Beulah and a subbituminous Powder River Basin (PRB)-fired unit: Stanton Station Unit 1 (SS1). This project was one of three conducted by the consortium under the DOE <span class="hlt">mercury</span> program to systematically test Hg <span class="hlt">control</span> technologies available for utilities burning lignite. The overall objective of the three projects was to field-test and verify options that may be applied cost-effectively by the lignite industry to reduce Hg emissions. The EERC, URS, and other team members tested sorbent injection technologies for plants equipped with electrostatic precipitators (ESPs</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19830027375','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19830027375"><span>A rate-<span class="hlt">controlled</span> teleoperator <span class="hlt">task</span> with simulated transport delays</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Pennington, J. E.</p> <p>1983-01-01</p> <p>A teleoperator-system simulation was used to examine the effects of two <span class="hlt">control</span> modes (joint-by-joint and resolved-rate), a proximity-display method, and time delays (up to 2 sec) on the <span class="hlt">control</span> of a five-degree-of-freedom manipulator performing a probe-in-hole alignment <span class="hlt">task</span>. Four subjects used proportional rotational <span class="hlt">control</span> and discrete (on-off) translation <span class="hlt">control</span> with computer-generated visual displays. The proximity display enabled subjects to separate rotational errors from displacement (translation) errors; thus, when the proximity display was used with resolved-rate <span class="hlt">control</span>, the simulated <span class="hlt">task</span> was trivial. The time required to perform the simulated <span class="hlt">task</span> increased linearly with time delay, but time delays had no effect on alignment accuracy. Based on the results of this simulation, several future studies are recommended.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/AD1018988','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/AD1018988"><span>Airborne Warning and <span class="hlt">Control</span> System Block 40/<span class="hlt">45</span> Upgrade (AWACS Blk 40/<span class="hlt">45</span> Upgrade)</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2015-12-01</p> <p>Selected Acquisition Report ( SAR ) RCS: DD-A&T(Q&A)823-277 Airborne Warning and <span class="hlt">Control</span> System Block 40/<span class="hlt">45</span> Upgrade (AWACS Blk 40/<span class="hlt">45</span> Upgrade) As of...Upgrade December 2015 SAR March 23, 2016 16:04:37 UNCLASSIFIED 2 Table of Contents Common Acronyms and Abbreviations for MDAP Programs 3 Program...Acquisition Unit Cost AWACS Blk 40/<span class="hlt">45</span> Upgrade December 2015 SAR March 23, 2016 16:04:37 UNCLASSIFIED 3 PB - President’s Budget PE - Program Element</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20150008969','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20150008969"><span><span class="hlt">Mercury</span>'s Weather-Beaten Surface: Understanding <span class="hlt">Mercury</span> in the Context of Lunar and Asteroidal Space Weathering Studies</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Domingue, Deborah L.; Chapman, Clark. R.; Killen, Rosemary M.; Zurbuchen, Thomas H.; Gilbert, Jason A.; Sarantos, Menelaos; Benna, Mehdi; Slavin, James A.; Schriver, David; Travnicek, Pavel M.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20150008969'); toggleEditAbsImage('author_20150008969_show'); toggleEditAbsImage('author_20150008969_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20150008969_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20150008969_hide"></p> <p>2014-01-01</p> <p> nanometer-scale particles may also account for <span class="hlt">Mercury</span>'s relatively featureless visible-near-infrared reflectance spectra. Characteristics of material returned from asteroid 25143 Itokawa demonstrate that this nanometer-scale material need not be pure iron, raising the possibility that the nanometer-scale material on <span class="hlt">Mercury</span> may have a composition different from iron metal [such as (Fe,Mg)S]. The expected depletion of volatiles and particularly alkali metals from solar-wind interaction processes are inconsistent with the detection of sodium, potassium, and sulfur within the regolith. One plausible explanation invokes a larger fine fraction (grain size less than <span class="hlt">45</span> micron) and more radiation-damaged grains than in the lunar surface material to create a regolith that is a more efficient reservoir for these volatiles. By this view the volatile elements detected are present not only within the grain structures, but also as adsorbates within the regolith and deposits on the surfaces of the regolith grains. The comparisons with findings from the Moon and asteroids provide a basis for predicting how compositional modifications induced by space weathering have affected <span class="hlt">Mercury</span>'s surface composition.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/885056','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/885056"><span>Phytoremediation of Ionic and Methyl <span class="hlt">Mercury</span> Pollution</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Meagher, Richard B.</p> <p></p> <p> plants to <span class="hlt">control</span> the chemical speciation, electrochemical state, transport, and aboveground binding of <span class="hlt">mercury</span> in order to manage this toxicant. To advance this <span class="hlt">mercury</span> phytoremediation strategy, our planned research focuses on the following Specific Aims: (1) to increase the transport of <span class="hlt">mercury</span> to aboveground tissue; (2) to identify small <span class="hlt">mercury</span> binding peptides that enhance hyperaccumulation aboveground; (3) to test the ability of multiple genes acting together to enhance resistance and hyperaccumulation; (4) to construct a simple molecular system for creating male/female sterility, allowing engineered grass, shrub, and tree species to be released indefinitely at contaminated sites; (5) to test the ability of transgenic cottonwood and rice plants to detoxify ionic <span class="hlt">mercury</span> and prevent methylmercury release from contaminated sediment; and (6) to initiate field testing with transgenic cottonwood and rice for the remediation of methylmercury and ionic <span class="hlt">mercury</span>. The results of these experiments will enable the phytoremediation of methyl- and ionic <span class="hlt">mercury</span> by a wide spectrum of deep-rooted, fast-growing plants adapted to diverse environments. We have made significant progress on all six of these specific aims as summarized below.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4142812','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4142812"><span><span class="hlt">Mercury</span> in Arctic Marine Ecosystems: Sources, Pathways, and Exposure</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Kirk, Jane L.; Lehnherr, Igor; Andersson, Maria; Braune, Birgit M.; Chan, Laurie; Dastoor, Ashu P.; Durnford, Dorothy; Gleason, Amber L.; Loseto, Lisa L.; Steffen, Alexandra; St. Louis, Vincent L.</p> <p>2014-01-01</p> <p><span class="hlt">Mercury</span> in the Arctic is an important environmental and human health issue. The reliance of Northern Peoples on traditional foods, such as marine mammals, for subsistence means that they are particularly at risk from <span class="hlt">mercury</span> exposure. The cycling of <span class="hlt">mercury</span> in Arctic marine systems is reviewed here, with emphasis placed on the key sources, pathways and processes which regulate <span class="hlt">mercury</span> levels in marine food webs and ultimately the exposure of human populations to this contaminant. While many knowledge gaps exist limiting our ability to make strong conclusions, it appears that the long range transport of <span class="hlt">mercury</span> from Asian emissions is an important source of atmospheric Hg to the Arctic and that <span class="hlt">mercury</span> methylation resulting in monomethylmercury production (an organic form of <span class="hlt">mercury</span> which is both toxic and bioaccumulated) in Arctic marine waters is the principal source of <span class="hlt">mercury</span> incorporated into food webs. <span class="hlt">Mercury</span> concentrations in biological organisms have increased since the onset of the industrial age and are <span class="hlt">controlled</span> by a combination of abiotic factors (e.g., monomethylmercury supply), food web dynamics and structure, and animal behavior (e.g., habitat selection and feeding behavior). Finally, although some Northern Peoples have high <span class="hlt">mercury</span> concentrations of <span class="hlt">mercury</span> in their blood and hair, harvesting and consuming traditional foods has many nutritional, social, cultural and physical health benefits which must be considered in risk management and communication. PMID:23102902</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12474411','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12474411"><span>[Occupational acute <span class="hlt">mercury</span> intoxication--a case report].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Złotkowska, Renata; Zajac-Nedza, Maria</p> <p>2002-01-01</p> <p>The aim of this paper is to present a case of acute occupational <span class="hlt">mercury</span> poisoning treated at the Clinical Department of Occupational Diseases. A welder, forty years old was employed at a large chemical plant in the dissembling department involved in the production of acetaldehyde. The patient was referred to the hospital by an occupational physician. During his shift; dissembling <span class="hlt">mercury</span>-covered tubes a nausea, abdominal pain and elevated temperature occurred. He was also complaining of headache and symptoms of gingivitis, which lasted two weeks before hospitalization. Before admission to the Clinical Department, <span class="hlt">mercury</span> concentrations in urine were measured twice. The urine <span class="hlt">mercury</span> levels were very high, impossible to determine precisely. During hospitalization, the patient was complaining of head and gingiva pains. Since the symptoms persisted and high urine <span class="hlt">mercury</span> levels (830 micrograms/l) were determined--DMPS--Heyl was administered. After treatment symptoms subsided and the concentration of <span class="hlt">mercury</span> in urine was gradually returning to normal. The results of laboratory tests did not reveal any impairment of internal organs. Consultant in neurology found the presence of nystagmus and positive Romberg test in the patient. Neurological signs disappeared after a month. The measurements performed by the Department of Work Safety revealed high exceeded hygiene permissible limits of <span class="hlt">mercury</span> vapors in the air. The information provided by the employer's technical services also showed that the patient was working with the face mask, but its absorber was not readjusted to <span class="hlt">mercury</span> vapors. A <span class="hlt">control</span> ambulatory examination (one and a half year later) did not reveal health effects of acute exposure to <span class="hlt">mercury</span> vapors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19350920','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19350920"><span><span class="hlt">Mercury</span> capture within coal-fired power plant electrostatic precipitators: model evaluation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Clack, Herek L</p> <p>2009-03-01</p> <p>Efforts to reduce anthropogenic <span class="hlt">mercury</span> emissions worldwide have recently focused on a variety of sources, including <span class="hlt">mercury</span> emitted during coal combustion. Toward that end, much research has been ongoing seeking to develop new processes for reducing coal combustion <span class="hlt">mercury</span> emissions. Among air pollution <span class="hlt">control</span> processes that can be applied to coal-fired boilers, electrostatic precipitators (ESPs) are by far the most common, both on a global scale and among the principal countries of India, China, and the U.S. that burn coal for electric power generation. A previously reported theoretical model of in-flight <span class="hlt">mercury</span> capture within ESPs is herein evaluated against data from a number of full-scale tests of activated carbon injection for <span class="hlt">mercury</span> emissions <span class="hlt">control</span>. By using the established particle size distribution of the activated carbon and actual or estimated values of its equilibrium <span class="hlt">mercury</span> adsorption capacity, the incremental reduction in <span class="hlt">mercury</span> concentration across each ESP can be predicted and compared to experimental results. Because the model does not incorporate kinetics associated with gas-phase <span class="hlt">mercury</span> transformation or surface adsorption, the model predictions representthe mass-transfer-limited performance. Comparing field data to model results reveals many facilities performing at or near the predicted mass-transfer-limited maximum, particularly at low rates of sorbent injection. Where agreement is poor between field data and model predictions, additional chemical or physical phenomena may be responsible for reducing <span class="hlt">mercury</span> removal efficiencies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1175492','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1175492"><span>Method for removal and stabilization of <span class="hlt">mercury</span> in <span class="hlt">mercury</span>-containing gas streams</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Broderick, Thomas E.</p> <p>2005-09-13</p> <p>The present invention is directed to a process and apparatus for removing and stabilizing <span class="hlt">mercury</span> from <span class="hlt">mercury</span>-containing gas streams. A gas stream containing vapor phase elemental and/or speciated <span class="hlt">mercury</span> is contacted with reagent, such as an oxygen-containing oxidant, in a liquid environment to form a <span class="hlt">mercury</span>-containing precipitate. The <span class="hlt">mercury</span>-containing precipitate is kept or placed in solution and reacts with one or more additional reagents to form a solid, stable <span class="hlt">mercury</span>-containing compound.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70010948','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70010948"><span><span class="hlt">Mercury</span> distribution in ancient and modern sediment of northeastern Bering Sea</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Nelson, C.H.; Pierce, D.E.; Leong, K.W.; Wang, F.F.H.</p> <p>1975-01-01</p> <p>Reconnaissance sampling of surface and subsurface sediment to a maximum depth of 80 m below the sea floor shows that typical values of 0.03 p.p.m. and anomalies of 0.2-1.3 p.p.m. <span class="hlt">mercury</span> have been present in northeastern Bering Sea since Early Pliocene time. Values are highest in modern beach (maximum 1.3 and mean 0.22 p.p.m. Hg) and nearshore subsurface gravels (maximum 0.6 and mean 0.06 p.p.m. Hg) along the highly mineralized Seward Peninsula and in clayey silt rich in organic matter (maximum 0.16 and mean 0.10 p.p.m. Hg) throughout the region. Although gold mining may be partly responsible for high <span class="hlt">mercury</span> levels in the modern beach near Nome, Alaska (maximum 0.<span class="hlt">45</span> p.p.m.), equally high or greater concentrations of <span class="hlt">mercury</span> occur in buried Pleistocene sediments immediately offshore (maximum 0.6 p.p.m.) and in modern unpolluted beach sediments at Bluff (maximum 1.3 p.p.m.); this suggests that the contamination effects of mining may be no greater than natural concentration processes in the Seward Peninsula region. The <span class="hlt">mercury</span> content of offshore surface sediment, even adjacent to <span class="hlt">mercury</span>-rich beaches, corresponds to that of unpolluted marine and fresh-water sediment elsewhere. The normal values that prevail offshore may be attributable to entrapment of <span class="hlt">mercury</span>-bearing heavy minerals on beaches near sources and/or dilution effects of offshore sedimentation. The few minor anomalies offshore occur in glacial drift derived from <span class="hlt">mercury</span> source regions of Chukotka (Siberia) and Seward Peninsula; Pleistocene shoreline processes have reworked the drift to concentrate the heavy metals. The distribution pattern of <span class="hlt">mercury</span> indicates that particulate <span class="hlt">mercury</span>-bearing minerals have not been widely dispersed from onland deposits in quantities sufficient to increase <span class="hlt">mercury</span> levels above normal in offshore sediments of Bering Sea; however, it shows that natural sedimentary processes can concentrate this <span class="hlt">mercury</span> in beaches of the coastal zone where there already is concern because of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70026046','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70026046"><span>Atmospheric <span class="hlt">mercury</span> emissions from mine wastes and surrounding geologically enriched terrains</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Gustin, M.S.; Coolbaugh, M.F.; Engle, M.A.; Fitzgerald, B.C.; Keislar, R.E.; Lindberg, S.E.; Nacht, D.M.; Quashnick, J.; Rytuba, J.J.; Sladek, C.; Zhang, H.; Zehner, R.E.</p> <p>2003-01-01</p> <p>Waste rock and ore associated with Hg, precious and base metal mining, and their surrounding host rocks are typically enriched in <span class="hlt">mercury</span> relative to natural background concentrations (<0.1 ??g Hg g-1). <span class="hlt">Mercury</span> fluxes to the atmosphere from mineralized areas can range from background rates (0-15 ng m-2 h-1) to tens of thousands of ng m-2 h-1. <span class="hlt">Mercury</span> enriched substrate constitutes a long-term source of <span class="hlt">mercury</span> to the global atmospheric <span class="hlt">mercury</span> pool. <span class="hlt">Mercury</span> emissions from substrate are influenced by light, temperature, precipitation, and substrate <span class="hlt">mercury</span> concentration, and occur during the day and night. Light-enhanced emissions are driven by two processes: desorption of elemental <span class="hlt">mercury</span> accumulated at the soil:air interface, and photo reduction of <span class="hlt">mercury</span> containing phases. To determine the need for and effectiveness of regulatory <span class="hlt">controls</span> on short-lived anthropogenic point sources the contribution of <span class="hlt">mercury</span> from geologic non-point sources to the atmospheric <span class="hlt">mercury</span> pool needs to be quantified. The atmospheric <span class="hlt">mercury</span> contribution from small areas of mining disturbance with relatively high <span class="hlt">mercury</span> concentrations are, in general, less than that from surrounding large areas of low levels of <span class="hlt">mercury</span> enrichment. In the arid to semi-arid west-ern United States volatilization is the primary means by which <span class="hlt">mercury</span> is released from enriched sites.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20980734','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20980734"><span>Age-related effects on postural <span class="hlt">control</span> under multi-<span class="hlt">task</span> conditions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Granacher, Urs; Bridenbaugh, Stephanie A; Muehlbauer, Thomas; Wehrle, Anja; Kressig, Reto W</p> <p>2011-01-01</p> <p>Changes in postural sway and gait patterns due to simultaneously performed cognitive (CI) and/or motor interference (MI) <span class="hlt">tasks</span> have previously been reported and are associated with an increased risk of falling in older adults. The objectives of this study were to investigate the effects of a CI and/or MI <span class="hlt">task</span> on static and dynamic postural <span class="hlt">control</span> in young and elderly subjects, and to find out whether there is an association between measures of static and dynamic postural <span class="hlt">control</span> while concurrently performing the CI and/or MI <span class="hlt">task</span>. A total of 36 healthy young (n = 18; age: 22.3 ± 3.0 years; BMI: 21.0 ± 1.6 kg/m(2)) and elderly adults (n = 18; age: 73.5 ± 5.5 years; BMI: 24.2 ± 2.9 kg/m(2)) participated in this study. Static postural <span class="hlt">control</span> was measured during bipedal stance, and dynamic postural <span class="hlt">control</span> was obtained while walking on an instrumented walkway. Irrespective of the <span class="hlt">task</span> condition, i.e. single-<span class="hlt">task</span> or multiple <span class="hlt">tasks</span>, elderly participants showed larger center-of-pressure displacements and greater stride-to-stride variability than younger participants. Associations between measures of static and dynamic postural <span class="hlt">control</span> were found only under the single-<span class="hlt">task</span> condition in the elderly. Age-related deficits in the postural <span class="hlt">control</span> system seem to be primarily responsible for the observed results. The weak correlations detected between static and dynamic measures could indicate that fall-risk assessment should incorporate dynamic measures under multi-<span class="hlt">task</span> conditions, and that skills like erect standing and walking are independent of each other and may have to be trained complementarily. Copyright © 2010 S. Karger AG, Basel.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-GRC-1959-C-51943.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-GRC-1959-C-51943.html"><span>Artistic View of <span class="hlt">Mercury</span> Astronaut Training</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-10-21</p> <p>This composite image includes a photograph of pilot Joe Algranti testing the Multi-Axis Space Test Inertia Facility (MASTIF) inside Altitude Wind Tunnel at NASA’s Lewis Research Center with other images designed to simulate the interior of a <span class="hlt">Mercury</span> space capsule. As part of the space agency’s preparations for Project <span class="hlt">Mercury</span> missions, the seven <span class="hlt">Mercury</span> astronauts traveled to Cleveland in early 1960 to train on the MASTIF. Researchers used the device to familiarize the astronauts with the sensations of an out-of-<span class="hlt">control</span> spacecraft. The MASTIF was a three-axis rig with a pilot’s chair mounted in the center. An astronaut was secured in a foam couch in the center of the rig. The rig then spun on three axes from 2 to 50 rotations per minute. The astronauts used small nitrogen gas thrusters to bring the MASTIF under <span class="hlt">control</span>. In the fall of 1959, prior to the astronauts’ visit, Lewis researcher James Useller and Algranti perfected and calibrated the MASTIF.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002AGUFMOS72D..09L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002AGUFMOS72D..09L"><span>Reactive Gaseous <span class="hlt">Mercury</span> Formation Over The North Pacific Ocean: Influence Of Environmental Parameters On Elemental <span class="hlt">Mercury</span> Oxidation In The Marine Boundary Layer</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Laurier, F. J.</p> <p>2002-12-01</p> <p>Global <span class="hlt">mercury</span> models have identified wet and dry particle deposition and evasion of dissolved gaseous <span class="hlt">mercury</span> from the ocean and from land as key <span class="hlt">controls</span> over global <span class="hlt">mercury</span> cycling (1,2). Recent ocean studies (3,4) however, have indicated that estimated <span class="hlt">mercury</span> evasion rates from the ocean substantially exceed estimated deposition. Oxidized reactive gaseous <span class="hlt">mercury</span> species (RGHg) are now known to play a major role in the global <span class="hlt">mercury</span> cycle (2,5). RGHg species are water-soluble, exhibit a much shorter atmospheric lifetime than elemental <span class="hlt">mercury</span>, and contribute to a large extent to atmospheric <span class="hlt">mercury</span> deposition (2,3,6). Although recent global <span class="hlt">mercury</span> models have accounted for the dry deposition of RGHg derived from point source emissions (6,7), the formation and deposition of RGHg in remote areas have not been incorporated. We suggest that the oxidation of elemental <span class="hlt">mercury</span> over the ocean, by gas phase or heterogeneous reactions, is an important part the global <span class="hlt">mercury</span> cycle. In agreement with previous studies (3,8,9) our recent data from atmospheric collections over the North Pacific Ocean support the notion of enhanced oxidation in the marine boundary layer. Our results show an inverse correlation between RGHg production and ozone, and a diurnal cycle with highest concentrations during periods of highest UV irradiation. In addition, the relationship between RGHg and other parameters measured during the cruise will be discussed. Our results clearly show that RGHg deposition to the ocean must be an important Hg source, and a crucial part of the global Hg cycle. (1) Mason R.P., Fitzgerald W.F., and Morel F.M.M. (1994), The biogeochemical cycling of elemental <span class="hlt">mercury</span>: Anthropogenic influences, Geochim. Cosmochim. Acta, 58: 3191-3198 (2) Shia R.L., Seigneur C., Pai P., Ko M., and Sze N.-D. (1999), Global simulation of atmospheric <span class="hlt">mercury</span> concentrations and deposition fluxes, J. Geophy. Res., 104(D19), 23, 747-23, 760 (3) Mason, R.P., Lawson N.M., and Sheu G</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=motor+AND+performance+AND+learning+AND+difficulties&id=EJ990064','ERIC'); return false;" href="https://eric.ed.gov/?q=motor+AND+performance+AND+learning+AND+difficulties&id=EJ990064"><span>Self-<span class="hlt">Control</span> of <span class="hlt">Task</span> Difficulty during Training Enhances Motor Learning of a Complex Coincidence-Anticipation <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Andrieux, Mathieu; Danna, Jeremy; Thon, Bernard</p> <p>2012-01-01</p> <p>The aim of the present work was to analyze the influence of self-<span class="hlt">controlled</span> <span class="hlt">task</span> difficulty on motor learning. Participants had to intercept three targets falling at different velocities by displacing a stylus above a digitizer. <span class="hlt">Task</span> difficulty corresponded to racquet width. Half the participants (self-<span class="hlt">control</span> condition) could choose the racquet…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dggs.dnr.state.ak.us/webpubs/usgs/of/text/of72-0268.PDF','USGSPUBS'); return false;" href="http://www.dggs.dnr.state.ak.us/webpubs/usgs/of/text/of72-0268.PDF"><span><span class="hlt">Mercury</span> distribution in ancient and modern sediments of northeastern Bering Sea</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Nelson, C. Hans; Pierce, D.E.; Leong, K.W.; Wang, F.F.</p> <p>1972-01-01</p> <p>A reconnaissance of surface and subsurface sediments to a maximum depth of 244 feet below the sea floor shows that natural <span class="hlt">mercury</span> anomalies from 0.2 to 1.3 ppm have been present in northeastern Bering Sea since early Pliocene. The anomalies and mean values are highest in modern beach (maximum 1.3 and mean 0.22 ppm Hg) and nearshore subsurface gravels (maximum 0.6 and mean .06 ppm Hg) along the highly mineralized Seward Peninsula and in organic rich silt (maximum 0.16 and mean 0.10 ppm Hg) throughout the region; the mean values are lowest in offshore sands (0.03 ppm Hg) . Although gold mining may be partially responsible for high <span class="hlt">mercury</span> levels in the beaches near Nome, Alaska, equally high or greater concentrations of <span class="hlt">mercury</span> occur in ancient glacial sediments immediately offshore (0.6 ppm) and in modern unpolluted beach sediments at Bluff (0.<span class="hlt">45</span> - 1.3 ppm); this indicates that the contamination effects of mining may be no greater than natural concentration processes in the Seward Peninsula region. The background content of <span class="hlt">mercury</span> (0.03) throughout the central area of northeastern Bering Sea is similar to that elsewhere in the world. The low mean values (0.04 ppm) even immediately offshore from <span class="hlt">mercury</span>-rich beaches, suggests that in the surface sediments of northeastern Bering Sea, the highest concentrations are limited to the beaches near <span class="hlt">mercury</span> sources; occasionally, however, low <span class="hlt">mercury</span> anomalies occur offshore in glacial drift derived from <span class="hlt">mercury</span> source regions of Chukotka and Seward Peninsula and reworked by Pleistocene shoreline processes. The minimal values offshore may be attributable to beach entrapment of heavy minerals containing <span class="hlt">mercury</span> and/or dilution effects of modern sedimentation.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/971339','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/971339"><span><span class="hlt">Mercury</span> contamination extraction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Fuhrmann, Mark [Silver Spring, MD; Heiser, John [Bayport, NY; Kalb, Paul [Wading River, NY</p> <p>2009-09-15</p> <p><span class="hlt">Mercury</span> is removed from contaminated waste by firstly applying a sulfur reagent to the waste. <span class="hlt">Mercury</span> in the waste is then permitted to migrate to the reagent and is stabilized in a <span class="hlt">mercury</span> sulfide compound. The stable compound may then be removed from the waste which itself remains in situ following <span class="hlt">mercury</span> removal therefrom.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3514466','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3514466"><span>Global Trends in <span class="hlt">Mercury</span> Management</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Choi, Kyunghee</p> <p>2012-01-01</p> <p>The United Nations Environmental Program Governing Council has regulated <span class="hlt">mercury</span> as a global pollutant since 2001 and has been preparing the <span class="hlt">mercury</span> convention, which will have a strongly binding force through Global <span class="hlt">Mercury</span> Assessment, Global <span class="hlt">Mercury</span> Partnership Activities, and establishment of the Open-Ended Working Group on <span class="hlt">Mercury</span>. The European Union maintains an inclusive strategy on risks and contamination of <span class="hlt">mercury</span>, and has executed the <span class="hlt">Mercury</span> Export Ban Act since December in 2010. The US Environmental Protection Agency established the <span class="hlt">Mercury</span> Action Plan (1998) and the <span class="hlt">Mercury</span> Roadmap (2006) and has proposed systematic <span class="hlt">mercury</span> management methods to reduce the health risks posed by <span class="hlt">mercury</span> exposure. Japan, which experienced Minamata disease, aims vigorously at perfection in <span class="hlt">mercury</span> management in several ways. In Korea, the Ministry of Environment established the Comprehensive Plan and Countermeasures for <span class="hlt">Mercury</span> Management to prepare for the <span class="hlt">mercury</span> convention and to reduce risks of <span class="hlt">mercury</span> to protect public health. PMID:23230466</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/5641195-chromosome-breakage-humans-exposed-methyl-mercury-through-fish-consumption','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/5641195-chromosome-breakage-humans-exposed-methyl-mercury-through-fish-consumption"><span>Chromosome breakage in humans exposed to methyl <span class="hlt">mercury</span> through fish consumption</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Skerfving, S.; Hansson, K.; Lindsten, J.</p> <p>1980-08-01</p> <p>Chromosome analysis was performed on cells from lymphocyte cultures from nine subjects with increased levels of <span class="hlt">mercury</span> in their red blood cells and in four healthy <span class="hlt">controls</span>. The elevated <span class="hlt">mercury</span> levels were likely to have originated from dietary fish with high levels of methyl <span class="hlt">mercury</span>. A statistically significant rank correlation was found between the frequency of cells with chromosome breaks and <span class="hlt">mercury</span> concentration. The biological significance of these findings is at present unknown.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-8772556.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-8772556.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-04-27</p> <p>Astronaut L. Gordon Cooper, Jr., one of the original seven astronauts for <span class="hlt">Mercury</span> Project selected by NASA on April 27, 1959. The MA-9 mission, boosted by the <span class="hlt">Mercury</span>-Atlas launch vehicle, was the last flight of the <span class="hlt">Mercury</span> Project. The Faith 7 spacecraft orbited the Earth 22 times in 1-1/2 days.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1040032','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1040032"><span>FGD Additives to Segregate and Sequester <span class="hlt">Mercury</span> in Solid Byproducts - Final Report</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Searcy, K; Bltyhe, G M; Steen, W A</p> <p>2012-02-28</p> <p>Many <span class="hlt">mercury</span> <span class="hlt">control</span> strategies for U.S. coal-fired power generating plants involve co-benefit capture of oxidized <span class="hlt">mercury</span> from flue gases treated by wet flue gas desulfurization (FGD) systems. For these processes to be effective at overall <span class="hlt">mercury</span> <span class="hlt">control</span>, the captured <span class="hlt">mercury</span> must not be re-emitted to the atmosphere or into surface or ground water. The project sought to identify scrubber additives and FGD operating conditions under which <span class="hlt">mercury</span> re-emissions would decrease and <span class="hlt">mercury</span> would remain in the liquor and be blown down from the system in the chloride purge stream. After exiting the FGD system, <span class="hlt">mercury</span> would react with precipitating agentsmore » to form stable solid byproducts and would be removed in a dewatering step. The FGD gypsum solids, free of most of the <span class="hlt">mercury</span>, could then be disposed or processed for reuse as wallboard or in other beneficial reuse. The project comprised extensive bench-scale FGD scrubber tests in Phases I and II. During Phase II, the approaches developed at the bench scale were tested at the pilot scale. Laboratory wastewater treatment tests measured the performance of precipitating agents in removing <span class="hlt">mercury</span> from the chloride purge stream. Finally, the economic viability of the approaches tested was evaluated.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29022240','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29022240"><span><span class="hlt">Mercury</span> alters initiation and construction of nests by zebra finches, but not incubation or provisioning behaviors.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chin, Stephanie Y; Hopkins, William A; Cristol, Daniel A</p> <p>2017-11-01</p> <p><span class="hlt">Mercury</span> is an environmental contaminant that impairs avian reproduction, but the behavioral and physiological mechanisms underlying this effect are poorly understood. The objective of this study was to determine whether lifetime dietary exposure to <span class="hlt">mercury</span> (1.2 µg/g wet weight in food) impacted avian parental behaviors, and how this might influence reproductive success. To distinguish between the direct effects of <span class="hlt">mercury</span> on parents and offspring, we created four treatment groups of captive-bred zebra finches (Taeniopygia guttata), with <span class="hlt">control</span> and <span class="hlt">mercury</span>-exposed adults raising cross-fostered <span class="hlt">control</span> or <span class="hlt">mercury</span>-exposed eggs (from maternal transfer). <span class="hlt">Control</span> parents were 23% more likely to fledge young than parents exposed to <span class="hlt">mercury</span>, regardless of egg exposure. <span class="hlt">Mercury</span>-exposed parents were less likely to initiate nests than <span class="hlt">controls</span> and spent less time constructing them. Nests of <span class="hlt">mercury</span>-exposed pairs were lighter, possibly due to an impaired ability to bring nest material into the nestbox. However, nest temperature, incubation behavior, and provisioning rate did not differ between parental treatments. Unexposed <span class="hlt">control</span> eggs tended to have shorter incubation periods and higher hatching success than <span class="hlt">mercury</span>-exposed eggs, but there was no effect of parental exposure on these parameters. We accidentally discovered that parent finches transfer some of their body burden of <span class="hlt">mercury</span> to nestlings during feeding through secretion in the crop. These results suggest that, in <span class="hlt">mercury</span>-exposed songbirds, pre-laying parental behaviors, combined with direct exposure of embryos to <span class="hlt">mercury</span>, likely contribute to reduced reproductive success and should be considered in future studies. Further research is warranted in field settings, where parents are exposed to greater environmental challenges and subtle behavioral differences might have more serious consequences than were observed in captivity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2615407','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2615407"><span><span class="hlt">Mercury</span> BLASTP: Accelerating Protein Sequence Alignment</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jacob, Arpith; Lancaster, Joseph; Buhler, Jeremy; Harris, Brandon; Chamberlain, Roger D.</p> <p>2008-01-01</p> <p>Large-scale protein sequence comparison is an important but compute-intensive <span class="hlt">task</span> in molecular biology. BLASTP is the most popular tool for comparative analysis of protein sequences. In recent years, an exponential increase in the size of protein sequence databases has required either exponentially more running time or a cluster of machines to keep pace. To address this problem, we have designed and built a high-performance FPGA-accelerated version of BLASTP, <span class="hlt">Mercury</span> BLASTP. In this paper, we describe the architecture of the portions of the application that are accelerated in the FPGA, and we also describe the integration of these FPGA-accelerated portions with the existing BLASTP software. We have implemented <span class="hlt">Mercury</span> BLASTP on a commodity workstation with two Xilinx Virtex-II 6000 FPGAs. We show that the new design runs 11-15 times faster than software BLASTP on a modern CPU while delivering close to 99% identical results. PMID:19492068</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1050364-mercury-handling-target-system-muon-collider','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1050364-mercury-handling-target-system-muon-collider"><span><span class="hlt">Mercury</span> Handling for the Target System for a Muon Collider</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Graves, Van B; Mcdonald, K; Kirk, H.</p> <p>2012-01-01</p> <p>The baseline target concept for a Muon Collider or Neutrino Factory is a free-stream <span class="hlt">mercury</span> jet being impacted by an 8-GeV proton beam. The target is located within a 20-T magnetic field, which captures the generated pions that are conducted to a downstream decay channel. Both the <span class="hlt">mercury</span> and the proton beam are introduced at slight downward angles to the magnetic axis. A pool of <span class="hlt">mercury</span> serves as a receiving reservoir for the <span class="hlt">mercury</span> and a dump for the unexpended proton beam. The impact energy of the remaining beam and jet are substantial, and it is required that splashes andmore » waves be <span class="hlt">controlled</span> in order to minimize the potential for interference of pion production at the target. Design issues discussed in this paper include the nozzle, splash mitigation in the <span class="hlt">mercury</span> pool, the <span class="hlt">mercury</span> containment vessel, and the <span class="hlt">mercury</span> recirculation system.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21870413','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21870413"><span>[Color vision impairment in workers exposed to <span class="hlt">mercury</span> vapor].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jedrejko, Marta; Skoczyńska, Anna</p> <p>2011-01-01</p> <p>Acquired reversible dyschromatopsia has been associated with occupational exposure to <span class="hlt">mercury</span> vapor. Early-detected impairments in color discrimination precede adverse permanent effects of <span class="hlt">mercury</span>, so they may help to monitor the health of the exposed workers. The aim of this study was to evaluate the color discrimination ability in this group of workers, using Lanthony D-15d test. Employed in a chloralkali plant, 27 male workers exposed to <span class="hlt">mercury</span> vapor and 27 healthy white-collar workers (<span class="hlt">control</span> group) were qualified for the study. To assess color discrimination, the Lanthony 15-Hue desaturated test (Lanthony D-15) was used. In order to investigate quantitative and qualitative results, the Lanthony D-15d scoring software was performed. Urinary <span class="hlt">mercury</span> was determined using flameless atomic absorption spectrometry. In the workers exposed to <span class="hlt">mercury</span> vapor, urine <span class="hlt">mercury</span> concentration was 117.4 +/- 62.6 microg/g creatinine on average compared with 0.279 +/- 0.224 mg/g creatinine in the <span class="hlt">control</span> group (p < 0.0001). In 18 exposed persons (66.7%), the results of the Lanthony D-15d test showed qualitative changes, which are borderline corresponding to the early stage of developing dyschromatopsia type III. The quantitative analysis of the test findings indicated a significantly higher value of the Color Confusion Index (CCI) in the right eye in the exposed group compared to the <span class="hlt">control</span> group (p = 0.01), with no significant difference in the CCI in the left eye. In the exposed group, the CCI in the right eye was significantly higher than the CCI in the left eye (p = 0.0005). There was neither correlation between CCI and the level of urinary <span class="hlt">mercury</span>, nor between CCI and duration of exposure. The results showed that the Lanthony D-15d test is useful in the detection of early toxic effects in the eyesight of the workers exposed to <span class="hlt">mercury</span> vapor. The observed color vision impairments are borderline corresponding to the early stage of developing dyschromatopsia type III.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/20638580-fate-mercury-coal-utilization-byproducts','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/20638580-fate-mercury-coal-utilization-byproducts"><span>The fate of <span class="hlt">mercury</span> in coal utilization byproducts</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>William Aljoe; Thomas Feeley; James Murphy</p> <p>2005-05-01</p> <p>The US Department of Energy National Energy Technology Laboratory's (DOE/NETL's) research has helped to further scientific understanding of the environmental characteristics of coal-utilization by-products (CUBs) in both disposal and beneficial utilization applications. The following general observations can be drawn from results of the research that has been carried out to date: There appears to be only minimal <span class="hlt">mercury</span> release to the environment in typical disposal or utilization applications for CUBs generated using activated carbon injection (ACI) <span class="hlt">control</span> technologies; There appears to be only minimal <span class="hlt">mercury</span> release to the environment in typical disposal and utilization applications for CUBs generated using wetmore » FGD <span class="hlt">control</span> technologies. The potential release of <span class="hlt">mercury</span> from wet FGD gypsum during the manufacture of wallboard is still under evaluation; The amount of <span class="hlt">mercury</span> leached from CUB samples tested by DOE/NETL is significantly lower than the federal drinking water standards and water quality criteria for the protection of aquatic life; in many cases, leachate concentrations were below the standard test method detection limits. DOE/NETL will continue to partner with industry and other key stakeholders in carrying out research to better understand the fate of <span class="hlt">mercury</span> and other trace elements in the byproducts from coal combustion. 16 refs., 6 tabs.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/9176553','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/9176553"><span><span class="hlt">Mercury</span> content in skin-lightening creams and potential hazards to the health of Saudi Women.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>al-Saleh, I; al-Doush, I</p> <p>1997-06-06</p> <p>It seems evident from a wealth of scientific research that <span class="hlt">mercury</span> is toxic. Because of the nature of the Saudi markets, different brands of skin-lightening creams are widely available. In this study, 38 skin-lightening cream samples were collected and analyzed for <span class="hlt">mercury</span> by inductively coupled plasma spectrometry after an acid digestion procedure. About <span class="hlt">45</span>% of the tested skin-lightening cream samples contained <span class="hlt">mercury</span> at levels well above the FDA's acceptable limit of 1 ppm. These findings are alarming and have wide legal and educational implications for Saudi Arabia in particular and developing countries in general. Further investigation for possible adverse health effects is also needed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/5920338-speciation-mercury-compounds-differential-atomization-atomic-absorption-spectroscopy','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/5920338-speciation-mercury-compounds-differential-atomization-atomic-absorption-spectroscopy"><span>Speciation of <span class="hlt">mercury</span> compounds by differential atomization - atomic absorption spectroscopy</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Robinson, J.W.; Skelly, E.M.</p> <p></p> <p>This paper describes the dual stage atomization technique which allows speciation of several <span class="hlt">mercury</span>-containing compounds in aqueous solution and in biological fluids. The technique holds great promise for further speciation studies. Accurate temperature <span class="hlt">control</span>, expecially at temperatures less than 200/sup 0/C, is needed to separate the extremely volatile <span class="hlt">mercury</span> halides and simple organomercurials from each other. Studies with <span class="hlt">mercury</span> salts and EDTA, L-cysteine and dithioxamide demonstrate that this technique may be used to study the extent of complex formation. Investigations of biological fluids indicate that there is a single predominant form of <span class="hlt">mercury</span> in sweat and a single predominant formmore » of <span class="hlt">mercury</span> in urine. The <span class="hlt">mercury</span> compound in urine is more volatile than that in sweat. Both quantitative and qualitative analyses are possible with this technique.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15866768','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15866768"><span>Public health and economic consequences of methyl <span class="hlt">mercury</span> toxicity to the developing brain.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Trasande, Leonardo; Landrigan, Philip J; Schechter, Clyde</p> <p>2005-05-01</p> <p>Methyl <span class="hlt">mercury</span> is a developmental neurotoxicant. Exposure results principally from consumption by pregnant women of seafood contaminated by <span class="hlt">mercury</span> from anthropogenic (70%) and natural (30%) sources. Throughout the 1990s, the U.S. Environmental Protection Agency (EPA) made steady progress in reducing <span class="hlt">mercury</span> emissions from anthropogenic sources, especially from power plants, which account for 41% of anthropogenic emissions. However, the U.S. EPA recently proposed to slow this progress, citing high costs of pollution abatement. To put into perspective the costs of <span class="hlt">controlling</span> emissions from American power plants, we have estimated the economic costs of methyl <span class="hlt">mercury</span> toxicity attributable to <span class="hlt">mercury</span> from these plants. We used an environmentally attributable fraction model and limited our analysis to the neurodevelopmental impacts--specifically loss of intelligence. Using national blood <span class="hlt">mercury</span> prevalence data from the Centers for Disease <span class="hlt">Control</span> and Prevention, we found that between 316,588 and 637,233 children each year have cord blood <span class="hlt">mercury</span> levels > 5.8 microg/L, a level associated with loss of IQ. The resulting loss of intelligence causes diminished economic productivity that persists over the entire lifetime of these children. This lost productivity is the major cost of methyl <span class="hlt">mercury</span> toxicity, and it amounts to $8.7 billion annually (range, $2.2-43.8 billion; all costs are in 2000 US$). Of this total, $1.3 billion (range, $0.1-6.5 billion) each year is attributable to <span class="hlt">mercury</span> emissions from American power plants. This significant toll threatens the economic health and security of the United States and should be considered in the debate on <span class="hlt">mercury</span> pollution <span class="hlt">controls</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70031469','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70031469"><span>Whole-ecosystem study shows rapid fish-<span class="hlt">mercury</span> response to changes in <span class="hlt">mercury</span> deposition</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Harris, R.C.; Rudd, J.W.M.; Amyot, M.; Babiarz, Christopher L.; Beaty, K.G.; Blanchfield, P.J.; Bodaly, R.A.; Branfireun, B.A.; Gilmour, C.C.; Graydon, J.A.; Heyes, A.; Hintelmann, H.; Hurley, J.P.; Kelly, C.A.; Krabbenhoft, D.P.; Lindberg, S.E.; Mason, R.P.; Paterson, M.J.; Podemski, C.L.; Robinson, A.; Sandilands, K.A.; Southworthn, G.R.; St. Louis, V.L.; Tate, M.T.</p> <p>2007-01-01</p> <p>Methylmercury contamination of fisheries from centuries of industrial atmospheric emissions negatively impacts humans and wild-life worldwide. The response of fish methylmercury concentrations to changes in <span class="hlt">mercury</span> deposition has been difficult to establish because sediments/soils contain large pools of historical contamination, and many factors in addition to deposition affect fish <span class="hlt">mercury</span>. To test directly the response of fish contamination to changing <span class="hlt">mercury</span> deposition, we conducted a whole-ecosystem experiment, increasing the <span class="hlt">mercury</span> load to a lake and its watershed by the addition of enriched stable <span class="hlt">mercury</span> isotopes. The isotopes allowed us to distinguish between experimentally applied <span class="hlt">mercury</span> and <span class="hlt">mercury</span> already present in the ecosystem and to examine bioaccumulation of <span class="hlt">mercury</span> deposited to different parts of the watershed. Fish methylmercury concentrations responded rapidly to changes in <span class="hlt">mercury</span> deposition over the first 3 years of study. Essentially all of the increase in fish methylmercury concentrations came from <span class="hlt">mercury</span> deposited directly to the lake surface. In contrast, <1% of the <span class="hlt">mercury</span> isotope deposited to the watershed was exported to the lake. Steady state was not reached within 3 years. Lake <span class="hlt">mercury</span> isotope concentrations were still rising in lake biota, and watershed <span class="hlt">mercury</span> isotope exports to the lake were increasing slowly. Therefore, we predict that <span class="hlt">mercury</span> emissions reductions will yield rapid (years) reductions in fish methylmercury concentrations and will yield concomitant reductions in risk. However, a full response will be delayed by the gradual export of <span class="hlt">mercury</span> stored in watersheds. The rate of response will vary among lakes depending on the relative surface areas of water and watershed. ?? 2007 by The National Academy of Sciences of the USA.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27525667','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27525667"><span><span class="hlt">Mercury</span> concentrations in urine of amerindian populations near oil fields in the peruvian and ecuadorian amazon.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Webb, Jena; Coomes, Oliver T; Ross, Nancy; Mergler, Donna</p> <p>2016-11-01</p> <p><span class="hlt">Mercury</span> is a global contaminant with toxic, persistent effects on human health. Petroleum extraction is an important source of elemental <span class="hlt">mercury</span>; little is known about human exposure levels near oil fields in the Amazon basin. To characterize <span class="hlt">mercury</span> levels in people living near oil production sites in the Peruvian and Ecuadorian Amazon, <span class="hlt">controlling</span> for fish consumption, occupation, source of water and socio-demographic characteristics. Analyze <span class="hlt">mercury</span> levels in urine samples using cold vapour atomic fluorescence spectrometry from 76 indigenous men and women in eight riverine communities situated near oil wells or pipelines. Subjects answered a questionnaire soliciting socio-demographic, occupational and dietary information. Data were analyzed using multiple linear regression modeling. The mean value of U-Hg was 2.61μg/g creatinine (95% CI: 2.14-3.08), with 7% of the sample recording values above the global background standard suggested by The World Health Organization (5μg/g creatinine). Women who used water from a surface source had two and a half times the amount of <span class="hlt">mercury</span> in their urine (mean=3.70μg/g creatinine, 95% CI: 2.26-5.15) compared with women who used other water sources (mean =1.39μg/g creatinine, 95% CI: 0.51-2.25). Men who were involved in an oil clean-up operation had twice as much <span class="hlt">mercury</span> in their urine (mean =3.07μg/g creatinine, 95% CI: 1.97-4.16) as did those who worked on other <span class="hlt">tasks</span> (mean =1.56μg/g creatinine, 95% CI: 1.48-2.65). <span class="hlt">Mercury</span> levels were not associated with the number of fish meals per week. Indigenous peoples of the Peruvian and Ecuadorian Amazon living near oil production sites generally had urine <span class="hlt">mercury</span> levels within the global background standard suggested by the World Health Organization. Increased levels of <span class="hlt">mercury</span> in urine were detected for men involved in oil spill remediation and for women who relied on surface water for household needs. These findings signal the need for strict safety measures to limit the amount</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19990108480','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19990108480"><span><span class="hlt">Mercury</span>'s Magnetosphere</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Slavin, J. A.</p> <p>1999-01-01</p> <p>Among the major discoveries made by the Mariner 10 mission to the inner planets was the existence of an intrinsic magnetic field at <span class="hlt">Mercury</span> with a dipole moment of approx. 300 nT R(sup 3, sub M). This magnetic field is sufficient to stand off the solar wind at an altitude of about 1 R(sub M) (i.e. approx. 2439 km). Hence, <span class="hlt">Mercury</span> possesses a 'magnetosphere' from which the so]ar wind plasma is largely excluded and within which the motion of charged particles is <span class="hlt">controlled</span> by the planetary magnetic field. Despite its small size relative to the magnetospheres of the other planets, a <span class="hlt">Mercury</span> orbiter mission is a high priority for the space physics community. The primary reason for this great interest is that <span class="hlt">Mercury</span> unlike all the other planets visited thus far, lacks a significant atmosphere; only a vestigial exosphere is present. This results in a unique situation where the magnetosphere interacts directly with the outer layer of the planetary crust (i.e. the regolith). At all of the other planets the topmost regions of their atmospheres become ionized by solar radiation to form ionospheres. These planetary ionospheres then couple to electrodynamically to their magnetospheres or, in the case of the weakly magnetized Venus and Mars, directly to the solar wind. This magnetosphere-ionosphere coupling is mediated largely through field-aligned currents (FACs) flowing along the magnetic field lines linking the magnetosphere and the high-latitude ionosphere. <span class="hlt">Mercury</span> is unique in that it is expected that FACS will be very short lived due to the low electrical conductivity of the regolith. Furthermore, at the earth it has been shown that the outflow of neutral atmospheric species to great altitudes is an important source of magnetospheric plasma (following ionization) whose composition may influence subsequent magnetotail dynamics. However, the dominant source of plasma for most of the terrestrial magnetosphere is the 'leakage'of solar wind across the magnetopause and more</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/6238300-chronic-effects-low-level-mercury-cadmium-goldfish-carassius-auratus','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/6238300-chronic-effects-low-level-mercury-cadmium-goldfish-carassius-auratus"><span>Chronic effects of low-level <span class="hlt">mercury</span> and cadmium to goldfish (Carassius Auratus)</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Westerman, A.G.</p> <p>1984-01-01</p> <p>During this five and one half year investigation, experiments were performed to determine the effects of nanogram levels of cadmium and <span class="hlt">mercury</span> on reproductive performance, growth, and tissue residues of goldfish. In addition, embryo-larval bioassays were conducted on these metals to compare the effects of a short-term exposure to a sensitive life-cycle stage (i.e., eggs and larvae) with a sustained exposure to a relatively insensitive life-cycle period (i.e., adult). Reproduction was blocked by the long-term exposure to 0.25 ..mu..g/l <span class="hlt">mercury</span> and 0.27 ..mu..g/l cadmium. Over the 1972 days, the <span class="hlt">control</span> fish spawned on eleven occasions, but the experimentals failed tomore » spawn. The metal-induced reproductive impairment continued in the experimentals even after six months in clean water. Growth of the populations exposed to <span class="hlt">mercury</span> and cadmium was significantly less than that of the <span class="hlt">control</span> population (P < 0.001). The <span class="hlt">mercury</span>, cadmium and <span class="hlt">control</span> populations grew by 229%, 232% and 353%, respectively. <span class="hlt">Mercury</span> and cadmium continuously accumulated in fish tissues over the entire 1789 days of whole body exposure. Despite exposure to <span class="hlt">mercury</span> as inorganic metal, organomercury also accumula« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26581792','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26581792"><span>Age Moderates the Association of Aerobic Exercise with Initial Learning of an Online <span class="hlt">Task</span> Requiring Cognitive <span class="hlt">Control</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>O'Connor, Patrick J; Tomporowski, Phillip D; Dishman, Rodney K</p> <p>2015-11-01</p> <p>The aim of this study was to examine whether people differed in change in performance across the first five blocks of an online flanker <span class="hlt">task</span> and whether those trajectories of change were associated with self-reported aerobic or resistance exercise frequency according to age. A total of 8752 men and women aged 13-89 completed a lifestyle survey and five <span class="hlt">45</span>-s games (each game was a block of ~46 trials) of an online flanker <span class="hlt">task</span>. Accuracy of the congruent and incongruent flanker stimuli was analyzed using latent class and growth curve modeling adjusting for time between blocks, whether the blocks occurred on the same or different days, education, smoking, sleep, caffeinated coffee and tea use, and Lumosity training status ("free play" or part of a "daily brain workout"). Aerobic and resistance exercise were unrelated to first block accuracies. For the more cognitively demanding incongruent flanker stimuli, aerobic activity was positively related to the linear increase in accuracy [B=0.577%, 95% confidence interval (CI), 0.112 to 1.25 per day above the weekly mean of 2.8 days] and inversely related to the quadratic deceleration of accuracy gains (B=-0.619% CI, -1.117 to -0.121 per day). An interaction of aerobic activity with age indicated that active participants younger than age <span class="hlt">45</span> had a larger linear increase and a smaller quadratic deceleration compared to other participants. Age moderates the association between self-reported aerobic, but not self-reported resistance, exercise and changes in cognitive <span class="hlt">control</span> that occur with practice during incongruent presentations across five blocks of a <span class="hlt">45</span>-s online, flanker <span class="hlt">task</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=76096&keyword=information+AND+technology+AND+internet&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=76096&keyword=information+AND+technology+AND+internet&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">MERCURY</span> SPECIATION AND CAPTURE</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>In December 2000, the U.S. Environmental Protection Agency (USEPA) announced its intent to regulate <span class="hlt">mercury</span> emissions from coal-fired electric utility steam generating plants. Maximum achievable <span class="hlt">control</span> technology (MACT) requirements are to be proposed by December 2003 and finali...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/of/2007/1252/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/of/2007/1252/"><span>Peru <span class="hlt">Mercury</span> Inventory 2006</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Brooks, William E.; Sandoval, Esteban; Yepez, Miguel A.; Howard, Howell</p> <p>2007-01-01</p> <p>In 2004, a specific need for data on <span class="hlt">mercury</span> use in South America was indicated by the United Nations Environmental Programme-Chemicals (UNEP-Chemicals) at a workshop on regional <span class="hlt">mercury</span> pollution that took place in Buenos Aires, Argentina. <span class="hlt">Mercury</span> has long been mined and used in South America for artisanal gold mining and imported for chlor-alkali production, dental amalgam, and other uses. The U.S. Geological Survey (USGS) provides information on domestic and international <span class="hlt">mercury</span> production, trade, prices, sources, and recycling in its annual Minerals Yearbook <span class="hlt">mercury</span> chapter. Therefore, in response to UNEP-Chemicals, the USGS, in collaboration with the Economic Section of the U.S. Embassy, Lima, has herein compiled data on Peru's exports, imports, and byproduct production of <span class="hlt">mercury</span>. Peru was selected for this inventory because it has a 2000-year history of <span class="hlt">mercury</span> production and use, and continues today as an important source of <span class="hlt">mercury</span> for the global market, as a byproduct from its gold mines. Peru is a regional distributor of imported <span class="hlt">mercury</span> and user of <span class="hlt">mercury</span> for artisanal gold mining and chlor-alkali production. Peruvian customs data showed that 22 metric tons (t) of byproduct <span class="hlt">mercury</span> was exported to the United States in 2006. Transshipped <span class="hlt">mercury</span> was exported to Brazil (1 t), Colombia (1 t), and Guyana (1 t). <span class="hlt">Mercury</span> was imported from the United States (54 t), Spain (19 t), and Kyrgyzstan (8 t) in 2006 and was used for artisanal gold mining, chlor-alkali production, dental amalgam, or transshipment to other countries in the region. Site visits and interviews provided information on the use and disposition of <span class="hlt">mercury</span> for artisanal gold mining and other uses. Peru also imports <span class="hlt">mercury</span>-containing batteries, electronics and computers, fluorescent lamps, and thermometers. In 2006, Peru imported approximately 1,900 t of a wide variety of fluorescent lamps; however, the <span class="hlt">mercury</span> contained in these lamps, a minimum of approximately 76 kilograms (kg), and in</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1244252','DOE-PATENT-XML'); return false;" href="https://www.osti.gov/servlets/purl/1244252"><span><span class="hlt">Mercury</span> removal sorbents</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Alptekin, Gokhan</p> <p>2016-03-29</p> <p>Sorbents and methods of using them for removing <span class="hlt">mercury</span> from flue gases over a wide range of temperatures are disclosed. Sorbent materials of this invention comprise oxy- or hydroxyl-halogen (chlorides and bromides) of manganese, copper and calcium as the active phase for Hg.sup.0 oxidation, and are dispersed on a high surface porous supports. In addition to the powder activated carbons (PACs), this support material can be comprised of commercial ceramic supports such as silica (SiO.sub.2), alumina (Al.sub.2O.sub.3), zeolites and clays. The support material may also comprise of oxides of various metals such as iron, manganese, and calcium. The non-carbon sorbents of the invention can be easily injected into the flue gas and recovered in the Particulate <span class="hlt">Control</span> Device (PCD) along with the fly ash without altering the properties of the by-product fly ash enabling its use as a cement additive. Sorbent materials of this invention effectively remove both elemental and oxidized forms of <span class="hlt">mercury</span> from flue gases and can be used at elevated temperatures. The sorbent combines an oxidation catalyst and a sorbent in the same particle to both oxidize the <span class="hlt">mercury</span> and then immobilize it.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2617743','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2617743"><span>CNTRICS Final <span class="hlt">Task</span> Selection: <span class="hlt">Control</span> of Attention</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Nuechterlein, Keith H.; Luck, Steven J.; Lustig, Cindy; Sarter, Martin</p> <p>2009-01-01</p> <p>The construct of attention has many facets that have been examined in human and animal research and in healthy and psychiatrically disordered conditions. The Cognitive Neuroscience Treatment Research to Improve Cognition in Schizophrenia (CNTRICS) group concluded that <span class="hlt">control</span> of attention—the processes that guide selection of <span class="hlt">task</span>-relevant inputs—is particularly impaired in schizophrenia and could profit from further work with refined measurement tools. Thus, nominations for cognitive <span class="hlt">tasks</span> that provide discrete measures of <span class="hlt">control</span> of attention were sought and were then evaluated at the third CNTRICS meeting for their promise for future use in treatment development. This article describes the 5 nominated measures and their strengths and weaknesses for cognitive neuroscience work relevant to treatment development. Two paradigms, Guided Search and the Distractor Condition Sustained Attention <span class="hlt">Task</span>, were viewed as having the greatest immediate promise for development into tools for treatment research in schizophrenia and are described in more detail by their nominators. PMID:19074499</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4380463','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4380463"><span>The Role of Motivation, Glucose and Self-<span class="hlt">Control</span> in the Antisaccade <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Kelly, Claire L.; Sünram-Lea, Sandra I.; Crawford, Trevor J.</p> <p>2015-01-01</p> <p>Research shows that self-<span class="hlt">control</span> is resource limited and there is a gradual weakening in consecutive self-<span class="hlt">control</span> <span class="hlt">task</span> performance akin to muscle fatigue. A body of evidence suggests that the resource is glucose and consuming glucose reduces this effect. This study examined the effect of glucose on performance in the antisaccade <span class="hlt">task</span> - which requires self-<span class="hlt">control</span> through generating a voluntary eye movement away from a target - following self-<span class="hlt">control</span> exertion in the Stroop <span class="hlt">task</span>. The effects of motivation and individual differences in self-<span class="hlt">control</span> were also explored. In a double-blind design, 67 young healthy adults received a 25g glucose or inert placebo drink. Glucose did not enhance antisaccade performance following self-<span class="hlt">control</span> exertion in the Stroop <span class="hlt">task</span>. Motivation however, predicted performance on the antisaccade <span class="hlt">task</span>; more specifically high motivation ameliorated performance decrements observed after initial self-<span class="hlt">control</span> exertion. In addition, individuals with high levels of self-<span class="hlt">control</span> performed better on certain aspects of the antisaccade <span class="hlt">task</span> after administration of a glucose drink. The results of this study suggest that the antisaccade <span class="hlt">task</span> might be a powerful paradigm, which could be used as a more objective measure of self-<span class="hlt">control</span>. Moreover, the results indicate that level of motivation and individual differences in self-<span class="hlt">control</span> should be taken into account when investigating deficiencies in self-<span class="hlt">control</span> following prior exertion. PMID:25826334</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1365664','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1365664"><span><span class="hlt">Mercury</span> Dispersion Modeling And Purge Ventilation Stack Height Determination For Tank 40H</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Rivera-Giboyeaux, A.</p> <p>2017-05-19</p> <p>The SRNL Atmospheric Technologies Group performed an analysis for <span class="hlt">mercury</span> emissions from H-Tank Farm - Tank 40 ventilation system exhaust in order to assess whether the Short Term Exposure Limit (STEL), or Threshold Limit Value (TLV) levels for <span class="hlt">mercury</span> will be exceeded during bulk sludge slurry mixing and sludge removal operations. The American Meteorological Society/Environmental Protection Agency Regulatory Model (AERMOD) was used as the main dispersion modelling tool for this analysis. The results indicated that a <span class="hlt">45</span>-foot stack is sufficient to raise the plume centerline from the Tank 40 release to prevent <span class="hlt">mercury</span> exposure problems for any of the stackmore » discharge scenarios provided. However, a 42-foot stack at Tank 40 is sufficient to prevent <span class="hlt">mercury</span> exposure concerns in all emission scenarios except the 50 mg/m 3 release. At a 42-foot stack height, values exceeding the exposure standards are only measured on receptors located above 34 feet.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19860023522','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19860023522"><span>Active <span class="hlt">controllers</span> and the time duration to learn a <span class="hlt">task</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Repperger, D. W.; Goodyear, C.</p> <p>1986-01-01</p> <p>An active <span class="hlt">controller</span> was used to help train naive subjects involved in a compensatory tracking <span class="hlt">task</span>. The <span class="hlt">controller</span> is called active in this context because it moves the subject's hand in a direction to improve tracking. It is of interest here to question whether the active <span class="hlt">controller</span> helps the subject to learn a <span class="hlt">task</span> more rapidly than the passive <span class="hlt">controller</span>. Six subjects, inexperienced to compensatory tracking, were run to asymptote root mean square error tracking levels with an active <span class="hlt">controller</span> or a passive <span class="hlt">controller</span>. The time required to learn the <span class="hlt">task</span> was defined several different ways. The results of the different measures of learning were examined across pools of subjects and across <span class="hlt">controllers</span> using statistical tests. The comparison between the active <span class="hlt">controller</span> and the passive <span class="hlt">controller</span> as to their ability to accelerate the learning process as well as reduce levels of asymptotic tracking error is reported here.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009EGUGA..1111109B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009EGUGA..1111109B"><span>Modeling <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Burger, M. H.; Killen, R. M.; M, N.; Sarantos, M.; Crider, D. H.; Vervak, R. J.</p> <p>2009-04-01</p> <p><span class="hlt">Mercury</span> has a tenuous exosphere created by the combined effects of solar radiation and micrometeoroid bombardment on the surface and the interaction of the solar wind with <span class="hlt">Mercury</span>'s magnetic field and surface. Observations of this exosphere provide essential data necessary for understanding the composition and evolution of <span class="hlt">Mercury</span>'s surface, as well as the interaction between <span class="hlt">Mercury</span>'s magnetosphere with the solar wind. The sodium component of the exosphere has been well observed from the ground (see review by Killen et al., 2007). These observations have revealed a highly variable and inhomogeneous exosphere with emission often peaking in the polar regions. Radiation acceleration drives exospheric escape producing a sodium tail pointing away from the sun which has been detected up to 1400 <span class="hlt">Mercury</span> radii from the planet (Potter et al. 2002; Baumgardner et al. 2008). Calcium has also been observed in <span class="hlt">Mercury</span>'s exosphere showing a distribution distinct from sodium, although also variable (Killen et al. 2005). During the first two encounters with <span class="hlt">Mercury</span> by MESSENGER, observations of the exosphere were made by the UltraViolet and Visible Spectrometer (UVVS) channel of the <span class="hlt">Mercury</span> Atmospheric and Surface Composition Spectrometer (MASCS). Sodium and calcium emission were detected during both flybys, and magnesium was detected for the first time in <span class="hlt">Mercury</span>'s exosphere during the second flyby. The spatial distributions of these species showed significant, unexpected differences which suggest differences in the mechanisms responsible for releasing them from the surface. We present a Monte-Carlo model of sodium, magnesium, and calcium in <span class="hlt">Mercury</span>'s exosphere. The important source mechanisms for ejecting these species from the surface are sputtering by solar wind ions, photon-stimulated desorption, and micrometeoroid impact vaporization. Thermal desorption on the dayside does not supply enough energy to significantly populate the exosphere, although it does play a role in</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.epa.gov/national-aquatic-resource-surveys/indicators-sediment-mercury','PESTICIDES'); return false;" href="https://www.epa.gov/national-aquatic-resource-surveys/indicators-sediment-mercury"><span>Indicators: Sediment <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>Sediment <span class="hlt">mercury</span> is <span class="hlt">mercury</span> that has become embedded into the bottom substrates of aquatic ecosystems. <span class="hlt">Mercury</span> is a common pollutant of aquatic ecosystems and it can have a substantial impact on both human and wildlife health.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=task+AND+performance&id=EJ1056538','ERIC'); return false;" href="https://eric.ed.gov/?q=task+AND+performance&id=EJ1056538"><span>Context-Sensitive Adjustment of Cognitive <span class="hlt">Control</span> in Dual-<span class="hlt">Task</span> Performance</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Fischer, Rico; Gottschalk, Caroline; Dreisbach, Gesine</p> <p>2014-01-01</p> <p>Performing 2 highly similar <span class="hlt">tasks</span> at the same time requires an adaptive regulation of cognitive <span class="hlt">control</span> to shield prioritized primary <span class="hlt">task</span> processing from between-<span class="hlt">task</span> (cross-talk) interference caused by secondary <span class="hlt">task</span> processing. In the present study, the authors investigated how implicitly and explicitly delivered information promotes the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19524889','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19524889"><span>Atmospheric <span class="hlt">mercury</span> in Changbai Mountain area, northeastern China II. The distribution of reactive gaseous <span class="hlt">mercury</span> and particulate <span class="hlt">mercury</span> and <span class="hlt">mercury</span> deposition fluxes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wan, Qi; Feng, Xinbin; Lu, Julia; Zheng, Wei; Song, Xinjie; Li, Ping; Han, Shijie; Xu, Hao</p> <p>2009-08-01</p> <p>Reactive gaseous <span class="hlt">mercury</span> (RGM) and particulate <span class="hlt">mercury</span> (Hgp) concentrations in ambient air from a remote site at Changbai Mountain area in northeastern China were intermittently monitored from August 2005 to July 2006 totaling 93 days representing fall, winter-spring and summer season, respectively. Rainwater and snow samples were collected during a whole year, and total <span class="hlt">mercury</span> (THg) in rain samples were used to calculate wet depositional flux. A throughfall method and a model method were used to estimate dry depositional flux. Results showed mean concentrations of RGM and Hgp are 65 and 77 pg m(-3). Compared to background concentrations of atmospheric <span class="hlt">mercury</span> species in Northern Hemisphere, RGM and Hgp are significantly elevated in Changbai area. Large values for standard deviation indicated fast reactivity and a low residence time for these <span class="hlt">mercury</span> species. Seasonal variability is also important, with lower <span class="hlt">mercury</span> levels in summer compared to other seasons, which is attributed to scavenging by rainfall and low local <span class="hlt">mercury</span> emissions in summer. THg concentrations ranged from 11.5 to 15.9 ng L(-1) in rainwater samples and 14.9-18.6 ng L(-1) in throughfall samples. Wet depositional flux in Changbai area is calculated to be 8.4 microg m(-2) a(-1), and dry deposition flux is estimated to be 16.5 microg m(-2) a(-1) according to a throughfall method and 20.2 microg m(-2) a(-1) using a model method.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28536797','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28536797"><span>Distribution of <span class="hlt">Mercury</span> Concentrations in Tree Rings and Surface Soils Adjacent to a Phosphate Fertilizer Plant in Southern Korea.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jung, Raae; Ahn, Young Sang</p> <p>2017-08-01</p> <p>This study aimed to determine <span class="hlt">mercury</span> concentrations in tree rings and surface soils at distances of 4, 26 and 40 km from a fertilizer plant located in Yeosu City, Korea. <span class="hlt">Mercury</span> concentrations in all tree rings were low prior to the establishment of the plant in 1977 and became elevated thereafter. The highest average <span class="hlt">mercury</span> concentration in the tree rings was 11.96 ng g -1 at the Yeosu site located nearest to the plant, with the lowest average <span class="hlt">mercury</span> concentration of 4.<span class="hlt">45</span> ng g -1 at the Suncheon site furthest away from the plant. In addition, the highest <span class="hlt">mercury</span> content in the surface soil was 108.51 ng cm -3 at the Yeosu site, whereas the lowest <span class="hlt">mercury</span> content in the surface soil was 31.47 ng cm -3 at the Suncheon site. The <span class="hlt">mercury</span> levels decreased gradually with increasing distance from the plant.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16226300','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16226300"><span>Urinary <span class="hlt">mercury</span> in people living near point sources of <span class="hlt">mercury</span> emissions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Barregard, Lars; Horvat, Milena; Mazzolai, Barbara; Sällsten, Gerd; Gibicar, Darija; Fajon, Vesna; Dibona, Sergio; Munthe, John; Wängberg, Ingvar; Haeger Eugensson, Marie</p> <p>2006-09-01</p> <p>As part of the European <span class="hlt">Mercury</span> Emissions from Chlor Alkali Plants (EMECAP) project, we tested the hypothesis that contamination of ambient air with <span class="hlt">mercury</span> around chlor alkali plants using <span class="hlt">mercury</span> cells would increase the internal dose of <span class="hlt">mercury</span> in people living close to the plants. <span class="hlt">Mercury</span> in urine (U-Hg) was determined in 225 individuals living near a Swedish or an Italian chlor alkali plant, and in 256 age- and sex-matched individuals from two reference areas. Other factors possibly affecting <span class="hlt">mercury</span> exposure were examined. Emissions and concentrations of total gaseous <span class="hlt">mercury</span> (TGM) around the plants were measured and modeled. No increase in U-Hg could be demonstrated in the populations living close to the plants. This was the case also when the comparison was restricted to subjects with no dental amalgam and low fish consumption. The emissions of <span class="hlt">mercury</span> to air doubled the background level, but contributed only about 2 ng/m(3) to long-term averages in the residential areas. The median U-Hg levels in subjects with dental amalgam were 1.2 microg/g creatinine (micro/gC) in Italy and 0.6 microg/gC in Sweden. In individuals without dental amalgam, the medians were 0.9 microg/gC and 0.2 microg/gC, respectively. The number of amalgam fillings, as well as chewing, fish consumption, and female sex were associated with higher U-Hg. The difference between the countries is probably due to higher fish consumption in Italy, demethylated methyl <span class="hlt">mercury</span> (MeHg) being partly excreted in urine. Post hoc power calculations showed that if the background <span class="hlt">mercury</span> exposure is low it may be possible to demonstrate an increase in U-Hg of as little as about 10 ng/m(3) as a contribution to ambient <span class="hlt">mercury</span> from a point source.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28934656','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28934656"><span><span class="hlt">Mercury</span> accumulation plant Cyrtomium macrophyllum and its potential for phytoremediation of <span class="hlt">mercury</span> polluted sites.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xun, Yu; Feng, Liu; Li, Youdan; Dong, Haochen</p> <p>2017-12-01</p> <p>Cyrtomium macrophyllum naturally grown in 225.73 mg kg -1 of soil <span class="hlt">mercury</span> in mining area was found to be a potential <span class="hlt">mercury</span> accumulator plant with the translocation factor of 2.62 and the high <span class="hlt">mercury</span> concentration of 36.44 mg kg -1 accumulated in its aerial parts. Pot experiments indicated that Cyrtomium macrophyllum could even grow in 500 mg kg -1 of soil <span class="hlt">mercury</span> with observed inhibition on growth but no obvious toxic effects, and showed excellent <span class="hlt">mercury</span> accumulation and translocation abilities with both translocation and bioconcentration factors greater than 1 when exposed to 200 mg kg -1 and lower soil <span class="hlt">mercury</span>, indicating that it could be considered as a great <span class="hlt">mercury</span> accumulating species. Furthermore, the leaf tissue of Cyrtomium macrophyllum showed high resistance to <span class="hlt">mercury</span> stress because of both the increased superoxide dismutase activity and the accumulation of glutathione and proline induced by <span class="hlt">mercury</span> stress, which favorited <span class="hlt">mercury</span> translocation from the roots to the aerial parts, revealing the possible reason for Cyrtomium macrophyllum to tolerate high concentration of soil <span class="hlt">mercury</span>. In sum, due to its excellent <span class="hlt">mercury</span> accumulation and translocation abilities as well as its high resistance to <span class="hlt">mercury</span> stress, the use of Cyrtomium macrophyllum should be a promising approach to remediating <span class="hlt">mercury</span> polluted soils. Copyright © 2017 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=150523','PESTICIDES'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?direntryid=150523"><span>PRESENTED 04/05/2006: <span class="hlt">MERCURY</span> MEASUREMENTS ...</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>While traditional methods for determining <span class="hlt">mercury</span> in solid samples involve the use of aggressive chemicals to dissolve the matrix and the use of other chemicals to properly reduce the <span class="hlt">mercury</span> to the volatile elemental form, pyrolysis-based analyzers can be used by directly weighing the solid in a sampling boat and initiating the instrumental analysis for total <span class="hlt">mercury</span>. The research focused on in the subtasks is the development and application of state-of the-art technologies to meet the needs of the public, Office of Water, and ORD in the area of Water Quality. Located In the subtasks are the various research projects being performed in support of this <span class="hlt">Task</span> and more in-depth coverage of each project. Briefly, each project's objective is stated below.Subtask 1: To integrate state-of-the-art technologies (polar organic chemical integrative samplers, advanced solid-phase extraction methodologies with liquid chromatography/electrospray/mass spectrometry) and apply them to studying the sources and fate of a select list of PPCPs. Application and improvement of analytical methodologies that can detect non-volatile, polar, water-soluble pharmaceuticals in source waters at levels that could be environmentally significant (at concentrations less than parts per billion, ppb). IAG with USGS ends in FY05. APM 20 due in FY05.Subtask 2: Coordination of interagency research and public outreach activities for PPCPs. Participate on NSTC Health and Environment subcommittee wo</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1127897','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1127897"><span>The effect of occupational exposure to <span class="hlt">mercury</span> vapour on the fertility of female dental assistants.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Rowland, A S; Baird, D D; Weinberg, C R; Shore, D L; Shy, C M; Wilcox, A J</p> <p>1994-01-01</p> <p>Exposure to <span class="hlt">mercury</span> vapour or inorganic <span class="hlt">mercury</span> compounds can impair fertility in laboratory animals. To study the effects of <span class="hlt">mercury</span> vapour on fertility in women, eligibility questionnaires were sent to 7000 registered dental assistants in California. The final eligible sample of 418 women, who had become pregnant during the previous four years, were interviewed by telephone. Detailed information was collected on <span class="hlt">mercury</span> handling practices and the number of menstrual cycles without contraception it had taken them to become pregnant. Dental assistants not working with amalgam served as unexposed <span class="hlt">controls</span>. Women with high occupational exposure to <span class="hlt">mercury</span> were less fertile than unexposed <span class="hlt">controls</span>. The fecundability (probability of conception each menstrual cycle) of women who prepared 30 or more amalgams per week and who had five or more poor <span class="hlt">mercury</span> hygiene factors was only 63% of that for unexposed women (95% CI 42%-96%) after <span class="hlt">controlling</span> for covariates. Women with low exposure were more fertile, however, than unexposed <span class="hlt">controls</span>. Possible explanations for the U shaped dose response and limitations of the exposure measure are discussed. Further investigation is needed that uses biological measures of <span class="hlt">mercury</span> exposure. PMID:8124459</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19419743','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19419743"><span>[<span class="hlt">Mercury</span> impregnation in dentists and dental assistants in Monastir city, Tunisia].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chaari, N; Kerkeni, A; Saadeddine, S; Neffati, F; Khalfallah, T; Akrout, M</p> <p>2009-06-01</p> <p>The property of <span class="hlt">mercury</span> to amalgamate with other metals is used to create a material for filling teeth. This material remains the cheapest and most efficient in tooth restoration. <span class="hlt">Mercurial</span> toxicity has been documented since Antiquity but the metal remains widely used in some countries. This study compared <span class="hlt">mercury</span> impregnation in dentists and dental assistants in Monastir (Tunisia) to another population not exposed professionally. A cross-sectional study was made on 52 dentists and dental assistants working in private offices and in the stomatology unit of the Monastir teaching hospital, with a <span class="hlt">control</span> group of 52 physicians and nurses working in the Monastir Fattouma Bourguiba hospital. The groups were paired according to age and gender. The study lasted three months. A questionnaire investigated the socioprofessional features of the study population, non professional <span class="hlt">mercury</span> exposure, work environment, the various amalgam handling and preparation techniques, and preventive hygiene measures. Urinary and salivary sampling was performed so as to prevent any accidental <span class="hlt">mercurial</span> contamination. <span class="hlt">Mercury</span> level was assessed by atomic absorption spectroscopy in an automatic sampler, urine creatinine with Jaffé's colorimetric reaction. The results of <span class="hlt">mercury</span> level assessment were expressed in microg/g of creatinine, salivary <span class="hlt">mercury</span> in mug/l. The statistical analysis was made with the Epi.info 6 software. Khi(2) and Fisher tests were used to compare qualitative variables. The ANOVA test was used to compare averages with a statistic significance threshold at 0.05. Sixty-one percent of individuals with risk exposure worked in a dental clinic. Bruxism and onychophagia were more important in the <span class="hlt">control</span> group with a significant statistical difference (respectively, p=0.01 and p<0.0001). The urinary and salivary <span class="hlt">mercury</span> levels were significantly increased in the exposed group, with respective values of 20.4+/-42.4microg/g of creatinine and 10.6+/-13.02microg/l versus 0</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27234670','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27234670"><span>The effect of single-<span class="hlt">task</span> and dual-<span class="hlt">task</span> balance exercise programs on balance performance in adults with osteoporosis: a randomized <span class="hlt">controlled</span> preliminary trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Konak, H E; Kibar, S; Ergin, E S</p> <p>2016-11-01</p> <p>Osteoporosis is a serious disease characterized by muscle weakness in the lower extremities, shortened length of trunk, and increased dorsal kyphosis leading to poor balance performance. Although balance impairment increases in adults with osteoporosis, falls and fall-related injuries have been shown to occur mainly during the dual-<span class="hlt">task</span> performance. Several studies have shown that dual-<span class="hlt">task</span> performance was improved with specific repetitive dual-<span class="hlt">task</span> exercises. The aims of this study were to compare the effect of single- and dual-<span class="hlt">task</span> balance exercise programs on static balance, dynamic balance, and activity-specific balance confidence in adults with osteoporosis and to assess the effectiveness of dual-<span class="hlt">task</span> balance training on gait speed under dual-<span class="hlt">task</span> conditions. Older adults (N = 42) (age range, <span class="hlt">45</span>-88 years) with osteoporosis were randomly assigned into two groups. Single-<span class="hlt">task</span> balance training group was given single-<span class="hlt">task</span> balance exercises for 4 weeks, whereas dual-<span class="hlt">task</span> balance training group received dual-<span class="hlt">task</span> balance exercises. Participants received <span class="hlt">45</span>-min individualized training session, three times a week. Static balance was evaluated by one-leg stance (OLS) and a kinesthetic ability trainer (KAT) device. Dynamic balance was measured by the Berg Balance Scale (BBS), Time Up and Go (TUG) test, and gait speed. Self-confidence was assessed with the Activities-specific Balance Confidence (ABC-6) scale. Assessments were performed at baseline and after the 4-week program. At the end of the treatment periods, KAT score, BBS score, time in OLS and TUG, gait speeds under single- and dual-<span class="hlt">task</span> conditions, and ABC-6 scale scores improved significantly in all patients (p < 0.05). However, BBS and gait speeds under single- and dual-<span class="hlt">task</span> conditions showed significantly greater improvement in the dual-<span class="hlt">task</span> balance training group than in the single-<span class="hlt">task</span> balance training group (p < 0.05). ABC-6 scale scores improved more in the single-<span class="hlt">task</span> balance training group than</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10531810','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10531810"><span>The Texarkana <span class="hlt">mercury</span> incident.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lowry, L K; Rountree, P P; Levin, J L; Collins, S; Anger, W K</p> <p>1999-10-01</p> <p>In November 1997, 2 teenagers allegedly removed a large amount of metallic <span class="hlt">mercury</span> from an abandoned sign plant and distributed the material among friends. One teenager developed symptoms and admitted playing with <span class="hlt">mercury</span> to his physician. His blood <span class="hlt">mercury</span> was elevated. In February 1998, faculty from the University of Texas Health Center at Tyler conducted an investigation that included in-depth evaluations on 10 patients with urine <span class="hlt">mercury</span> concentrations up to 100 micrograms/L. Exposure pathways and timelines were reconstructed from records assembled by the Arkansas State Health Department epidemiologist. <span class="hlt">Mercury</span> contamination was found among teenagers, children, and adults who came in contact with the metal. Biomarkers of exposure documented reduction in <span class="hlt">mercury</span> concentrations after these persons were removed from their homes and sources of <span class="hlt">mercury</span>. Neurobehavioral assessment, including assessment of tremor, failed to establish a relationship between <span class="hlt">mercury</span> exposure and performance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20120009918','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20120009918"><span>New Morphometric Measurements of Peak-Ring Basins on <span class="hlt">Mercury</span> and the Moon: Results from the <span class="hlt">Mercury</span> Laser Altimeter and Lunar Orbiter Laser Altimeter</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Baker, David M. H.; Head, James W.; Prockter, Louise M.; Fassett, Caleb I.; Neumann, Gregory A.; Smith, David E.; Solomon, Sean C.; Zuber, Maria T.; Oberst, Juergen; Preusker, Frank; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20120009918'); toggleEditAbsImage('author_20120009918_show'); toggleEditAbsImage('author_20120009918_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20120009918_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20120009918_hide"></p> <p>2012-01-01</p> <p>Peak-ring basins (large impact craters exhibiting a single interior ring) are important to understanding the processes <span class="hlt">controlling</span> the morphological transition from craters to large basins on planetary bodies. New image and topography data from the <span class="hlt">MErcury</span> Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) and Lunar Reconnaissance Orbiter (LRO) spacecraft have helped to update the catalogs of peak-ring basins on <span class="hlt">Mercury</span> and the Moon [1,2] and are enabling improved calculations of the morphometric properties of these basins. We use current orbital altimeter measurements from the <span class="hlt">Mercury</span> Laser Altimeter (MLA) [3] and the Lunar Orbiter Laser Altimeter (LOLA) [4], as well as stereo-derived topography [5], to calculate the floor depths and peak-ring heights of peak-ring basins on <span class="hlt">Mercury</span> and the Moon. We present trends in these parameters as functions of rim-crest diameter, which are likely to be related to processes <span class="hlt">controlling</span> the onset of peak rings in these basins.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26479902','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26479902"><span><span class="hlt">Control</span> processes through the suppression of the automatic response activation triggered by <span class="hlt">task</span>-irrelevant information in the Simon-type <span class="hlt">tasks</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kim, Sanga; Lee, Sang Ho; Cho, Yang Seok</p> <p>2015-11-01</p> <p>The congruency sequence effect, one of the indices of cognitive <span class="hlt">control</span>, refers to a smaller congruency effect after an incongruent than congruent trial. Although the effect has been found across a variety of conflict <span class="hlt">tasks</span>, there is not yet agreement on the underlying mechanism. The present study investigated the mechanism underlying cognitive <span class="hlt">control</span> by using a cross-<span class="hlt">task</span> paradigm. In Experiments 1, 2, and 3, participants performed a modified Simon <span class="hlt">task</span> and a spatial Stroop <span class="hlt">task</span> alternately in a trial-by-trial manner. The <span class="hlt">task</span>-irrelevant dimension of the two <span class="hlt">tasks</span> was perceptually and conceptually identical in Experiment 1, whereas it was perceptually different but conceptually identical in Experiment 2. The response sets for both <span class="hlt">tasks</span> were different in Experiment 3. In Experiment 4, participants performed two Simon <span class="hlt">tasks</span> with different <span class="hlt">task</span>-relevant dimensions. In all experiments in which the <span class="hlt">task</span>-irrelevant dimension and response mode were shared, significant congruency sequence effects were found between the two different congruencies, indicating that Simon-type conflicts were resolved by a <span class="hlt">control</span> mechanism, which is specific to an abstract <span class="hlt">task</span>-irrelevant stimulus spatial dimension. Copyright © 2015 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-9801835.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-9801835.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1961-01-01</p> <p>Ham, a three-year-old chimpanzee, in the spacesuit he would wear for the second <span class="hlt">Mercury</span>- Redstone (MR-2) suborbital test flight in January, 1961. NASA used chimpanzees and other primates to test the <span class="hlt">Mercury</span> capsule before launching the fisrt American astronaut, Alan Shepard, in May 1961. The <span class="hlt">Mercury</span> capsule rode atop a modified Redstone rocket, developed by Dr. Wernher von Braun and the German Rocket Team in Huntsville, Alabama.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18599778','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18599778"><span><span class="hlt">Mercury</span>'s exosphere: observations during MESSENGER's First <span class="hlt">Mercury</span> flyby.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>McClintock, William E; Bradley, E Todd; Vervack, Ronald J; Killen, Rosemary M; Sprague, Ann L; Izenberg, Noam R; Solomon, Sean C</p> <p>2008-07-04</p> <p>During MESSENGER's first <span class="hlt">Mercury</span> flyby, the <span class="hlt">Mercury</span> Atmospheric and Surface Composition Spectrometer measured <span class="hlt">Mercury</span>'s exospheric emissions, including those from the antisunward sodium tail, calcium and sodium close to the planet, and hydrogen at high altitudes on the dayside. Spatial variations indicate that multiple source and loss processes generate and maintain the exosphere. Energetic processes connected to the solar wind and magnetospheric interaction with the planet likely played an important role in determining the distributions of exospheric species during the flyby.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21607817','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21607817"><span><span class="hlt">Mercury</span> bioremediation by <span class="hlt">mercury</span> accumulating Enterobacter sp. cells and its alginate immobilized application.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sinha, Arvind; Khare, Sunil Kumar</p> <p>2012-02-01</p> <p>The effective microbial remediation of the <span class="hlt">mercury</span> necessitates the <span class="hlt">mercury</span> to be trapped within the cells without being recycled back to the environment. The study describes a <span class="hlt">mercury</span> bioaccumulating strain of Enterobacter sp., which remediated <span class="hlt">mercury</span> from the medium simultaneous to its growth. The transmission electron micrographs and electron dispersive X-ray analysis revealed the accumulation of remediated <span class="hlt">mercury</span> as nano-size particles in the cytoplasm as well as on the cell wall. The Enterobacter sp. in the present work was able to accumulate <span class="hlt">mercury</span>, without being engineered in its native form. The possibility of recovering the accumulated <span class="hlt">mercury</span> from the cells is also indicated. The applicability of the alginate immobilized cells in removing <span class="hlt">mercury</span> from synthetic and complex industrial effluent in a batch mode was amply demonstrated. The initial load of 7.3 mg l(-1) <span class="hlt">mercury</span> in the industrial effluent was completely removed in 72 h. The cells immobilized in calcium alginate were similarly effective in the complete removal of 5 mg l(-1) HgCl(2) of <span class="hlt">mercury</span> from the synthetic effluent in less than 72 h. The immobilized cells could be reused for multiple cycles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010EGUGA..12.3150S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010EGUGA..12.3150S"><span>Seasonality of <span class="hlt">mercury</span> in the Atlantic marine boundary layer</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Soerensen, Anne L.; Sunderland, Elsie; Skov, Henrik; Holmes, Christopher; Jacob, Daniel J.</p> <p>2010-05-01</p> <p>Around one third of the <span class="hlt">mercury</span> emissions today are from primary anthropogenic sources, with the remaining two-thirds from secondary reemissions of earlier deposition and natural sources (AMAP/UNEP 2008). <span class="hlt">Mercury</span> exchange at the air-sea interface is important for the global distribution of atmospheric <span class="hlt">mercury</span> as parts of deposited <span class="hlt">mercury</span> will reenter the atmosphere through evasion. The exchange at the air-sea interface also affects the amount of inorganic <span class="hlt">mercury</span> in the ocean and thereby the conversion to the neuro-toxic methylmercury. Here we combine new cruise measurements in the atmospheric marine boundary layer (MBL) of the Atlantic Ocean (Northern Hemisphere) from the fall of 2006 and the spring of 2007 with existing data from cruises in the Atlantic Ocean since 1978. We observe from these data a seasonal cycle in Hg(0) concentrations in the Atlantic marine boundary later (MBL) that exhibits minimum concentrations during summer and high concentrations during fall to spring. These observations suggest a local, seasonally dependent Hg(0) source in the MBL that causes variability in concentrations above the open ocean. To further investigate <span class="hlt">controls</span> on Hg(0) concentrations in the MBL, we developed an improved representation of oceanic air-sea exchange processes within the GEOS-Chem global 3-D biogeochemical <span class="hlt">mercury</span> model. Specifically, we used new data on <span class="hlt">mercury</span> redox reactions in the surface ocean as a function of biological and photochemical processes, and implemented new algorithms for <span class="hlt">mercury</span> dynamics associated with suspended particles. Our coupled atmospheric-oceanic modeling results support the premise that oceanic evasion is a main driver <span class="hlt">controlling</span> Hg(0) concentrations in the MBL. We also use the model to investigate what drivers the evasion across the air-sea interface on shorter timescales. This is done by tracking evasion rates and other model components on an hourly basis for chosen locations in the Atlantic Ocean.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940012168','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940012168"><span><span class="hlt">Mercury</span> Surveillance Program</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1993-01-01</p> <p>Background on <span class="hlt">mercury</span> exposure is presented including forms, sources, permissible exposure limits, and physiological effects. The purpose of the <span class="hlt">Mercury</span> Surveillance Program at LeRC is outlined, and the specifics of the Medical Surveillance Program for <span class="hlt">Mercury</span> Exposure at LeRC are discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.epa.gov/newsreleases/naugatuck-conn-incinerator-control-mercury-emissions-under-settlement','PESTICIDES'); return false;" href="https://www.epa.gov/newsreleases/naugatuck-conn-incinerator-control-mercury-emissions-under-settlement"><span>Naugatuck, Conn. Incinerator to <span class="hlt">Control</span> <span class="hlt">Mercury</span> Emissions Under Settlement</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>Equipment to limit the amount of <span class="hlt">mercury</span> pollution sent into the atmosphere will be installed at an incinerator owned by Naugatuck, Conn., if an agreement between the USEPA, the U.S. Department of Justice, the Borough of Naugatuck...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=130212&Lab=NRMRL&keyword=bio+AND+remediation&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=130212&Lab=NRMRL&keyword=bio+AND+remediation&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span><span class="hlt">CONTROL</span> TECHNOLOGY EXTRACTION OF <span class="hlt">MERCURY</span> FROM GROUNDWATER IMMOBILIZED ALGAE</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Bio-Recovery Systems, Inc. conducted a project under the Emerging Technology portion of the United States Environmental Protection Agency (EPAs) Superfund Innovative Technology Evaluation (SITE) Program to evaluate the ability of immobilized algae to adsorb <span class="hlt">mercury</span> from contamina...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.P21A1189B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.P21A1189B"><span>Near Global Mosaic of <span class="hlt">Mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Becker, K. J.; Robinson, M. S.; Becker, T. L.; Weller, L. A.; Turner, S.; Nguyen, L.; Selby, C.; Denevi, B. W.; Murchie, S. L.; McNutt, R. L.; Solomon, S. C.</p> <p>2009-12-01</p> <p>In 2008 the MESSENGER spacecraft made two close flybys (M1 and M2) of <span class="hlt">Mercury</span> and imaged about 74% of the planet at a resolution of 1 km per pixel, and at higher resolution for smaller portions of the planet. The Mariner 10 spacecraft imaged about 42% of Mercury’s surface more than 30 years ago. Combining image data collected by the two missions yields coverage of about 83% of Mercury’s surface. MESSENGER will perform its third and final flyby of <span class="hlt">Mercury</span> (M3) on 29 September 2009. This will yield approximately 86% coverage of <span class="hlt">Mercury</span>, leaving only the north and south polar regions yet to be imaged by MESSENGER after orbit insertion in March 2011. A new global mosaic of <span class="hlt">Mercury</span> was constructed using 325 images containing 3566 <span class="hlt">control</span> points (8110 measures) from M1 and 225 images containing 1465 <span class="hlt">control</span> points (3506 measures) from M2. The M3 flyby is shifted in subsolar longitude only by 4° from M2, so the added coverage is very small. However, this small slice of <span class="hlt">Mercury</span> fills a gore in the mosaic between the M1 and M2 data and allows a complete cartographic tie around the equator. We will run a new bundle block adjustment with the additional images acquired from M3. This new edition of the MESSENGER <span class="hlt">Mercury</span> Dual Imaging System (MDIS) Narrow Angle Camera (NAC) global mosaic of <span class="hlt">Mercury</span> includes many improvements since the M2 flyby in October 2008. A new distortion model for the NAC camera greatly improves the image-to-image registration. Optical distortion correction is independent of pointing error correction, and both are required for a mosaic of high quality. The new distortion model alone reduced residual pointing errors for both flybys significantly; residual pixel error improved from 0.71 average (3.7 max) to 0.13 average (1.7 max) for M1 and from 0.72 average (4.8 max.) to 0.17 average (3.5 max) for M2. Analysis quantifying pivot motor position has led to development of a new model that improves accuracy of the pivot platform attitude. This model improves</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-S63-03960.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-S63-03960.html"><span><span class="hlt">MERCURY</span>-ATLAS (MA)-9 - "FRIENDSHIP 7" SPACECRAFT - PRELAUNCH ACTIVITIES - CAPE</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1963-02-01</p> <p>S63-03960 (1 Feb. 1963) --- Astronaut L. Gordon Cooper Jr., prime pilot for the <span class="hlt">Mercury</span>-Atlas 9 (MA-9) mission, checks over the instrument panel from <span class="hlt">Mercury</span> spacecraft #20 with Robert Graham, McDonnell Aircraft Corp. spacecraft engineer. It contains the instruments necessary to monitor spacecraft systems and sequencing, the <span class="hlt">controls</span> required to initiate primary sequences manually, and flight <span class="hlt">control</span> displays. Photo credit: NASA</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24253586','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24253586"><span>Use of artificial stream mesocosms to investigate <span class="hlt">mercury</span> uptake in the South River, Virginia, USA.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Brent, Robert N; Berberich, David A</p> <p>2014-02-01</p> <p><span class="hlt">Mercury</span> is a globally distributed pollutant that biomagnifies in aquatic food webs. In the United States, 4,769 water bodies fail to meet criteria for safe fish consumption due to <span class="hlt">mercury</span> bioaccumulation. Although the majority of these water bodies are affected primarily by atmospheric deposition of <span class="hlt">mercury</span>, legacy contamination from mining or industrial activities also contribute to fish consumption advisories for <span class="hlt">mercury</span>. The largest <span class="hlt">mercury</span> impairment in Virginia, a 130-mile stretch of the South and South Fork Shenandoah rivers, is posted with a fish-consumption advisory for <span class="hlt">mercury</span> contamination that originated from mercuric sulfate discharges from a textile facility in Waynesboro, Virginia, between 1929 and 1950. Although discharges of <span class="hlt">mercury</span> to the river ceased >60 years ago, <span class="hlt">mercury</span> levels in fish remain greater than levels safe for human consumption. This is due to the continued cycling of historic <span class="hlt">mercury</span> in the river and its eventual uptake and biomagnification through aquatic food webs. This study investigated the relative importance of waterborne versus sediment-borne <span class="hlt">mercury</span> in <span class="hlt">controlling</span> biological uptake of <span class="hlt">mercury</span> into the aquatic food web. Twelve artificial stream channels were constructed along the contaminated South River in Crimora, Virginia, and the uncontaminated North River in nearby Port Republic, Virginia, to provide four experimental treatments: a <span class="hlt">control</span> with no Hg exposure, a Hg in sediment exposure, a Hg in water exposure, and a Hg in sediment and water exposure. After 6 weeks of colonization and growth, algae in each treatment was collected and measured for <span class="hlt">mercury</span> accumulation. <span class="hlt">Mercury</span> accumulation in water-only exposures was four times greater than in sediment-only exposures and was equivalent to accumulation in treatments with combined water and sediment exposure. This indicates that <span class="hlt">mercury</span> in the water column is much more important in <span class="hlt">controlling</span> biological uptake than <span class="hlt">mercury</span> in near-field sediments. As a result, future</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70020684','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70020684"><span>Distribution of total <span class="hlt">mercury</span> and methyl <span class="hlt">mercury</span> in water, sediment, and fish from South Florida estuaries</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kannan, K.; Smith, R.G.; Lee, R.F.; Windom, H.L.; Heitmuller, P.T.; Macauley, J.M.; Summers, J.K.</p> <p>1998-01-01</p> <p>Concentrations of total <span class="hlt">mercury</span> and methyl <span class="hlt">mercury</span> were determined in sediment and fish collected from estuarine waters of Florida to understand their distribution and partitioning. Total <span class="hlt">mercury</span> concentrations in sediments ranged from 1 to 219 ng/g dry wt. Methyl <span class="hlt">mercury</span> accounted for, on average, 0.77% of total <span class="hlt">mercury</span> in sediment. Methyl <span class="hlt">mercury</span> concentrations were not correlated with total <span class="hlt">mercury</span> or organic carbon content in sediments. The concentrations of total <span class="hlt">mercury</span> in fish muscle were between 0.03 and 2.22 (mean: 0.31) ??g/g, wet wt, with methyl <span class="hlt">mercury</span> contributing 83% of total <span class="hlt">mercury</span>. Methyl <span class="hlt">mercury</span> concentrations in fish muscle were directly proportional to total <span class="hlt">mercury</span> concentrations. The relationship of total and methyl <span class="hlt">mercury</span> concentrations in fish to those of sediments from corresponding locations was fish-species dependent, in addition to several abiotic factors. Among fish species analyzed, hardhead catfish, gafftopsail catfish, and sand seatrout contained the highest concentrations of <span class="hlt">mercury</span>. Filtered water samples from canals and creeks that discharge into the Florida Bay showed <span class="hlt">mercury</span> concentrations of 3-7.4 ng/L, with methyl <span class="hlt">mercury</span> accounting for <0.03-52% of the total <span class="hlt">mercury</span>. Consumption of fish containing 0.31 ??g <span class="hlt">mercury</span>/g wet wt, the mean concentration found in this study, at rates greater than 70 g/day, was estimated to be hazardous to human health.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-PIA19418.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-PIA19418.html"><span><span class="hlt">Mercury</span> Sodium Tail</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2015-04-16</p> <p>This image from NASA MESSENGER spacecraft is stitched together from thousands of observations made over the past 4 years by the MASCS/UVVS instrument, which measures sunlight scattered off of <span class="hlt">Mercury</span> tenuous atmosphere. Scattered sunlight gives the sodium a bright orange glow. This scattering process also gives sodium atoms a push - this "radiation pressure" is strong enough, during parts of <span class="hlt">Mercury</span>'s year, to strip the atmosphere and give <span class="hlt">Mercury</span> a long glowing tail. Someone standing on <span class="hlt">Mercury</span>'s nightside at the right time of year would see a faint orange similar to a city sky illuminated by sodium lamps! Instrument: <span class="hlt">Mercury</span> Atmospheric and Surface Composition Spectrometer (MASCS)/Ultraviolet and Visible Spectrometer (UVVS) http://photojournal.jpl.nasa.gov/catalog/PIA19418</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-9801809.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-9801809.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-01-01</p> <p>Dr. Wernher von Braun, Director of the Army Ballistic Missile Agency's (ABMA) Development Operations Division, poses with the original <span class="hlt">Mercury</span> astronauts in ABMA's Fabrication Laboratory during a 1959 visit. Inspecting <span class="hlt">Mercury</span>-Redstone hardware are from left to right, Alan Shepard, Donald Deke Slayton, Virgil Gus Grissom, von Braun, Gordon Cooper, Wally Schirra, John Glenn, and Scott Carpenter. Project <span class="hlt">Mercury</span> officially began October 7, 1958 as the United States' first manned space program.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12663183','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12663183"><span>Modelling of <span class="hlt">mercury</span> emissions from background soils.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Scholtz, M T; Van Heyst, B J; Schroeder, W H</p> <p>2003-03-20</p> <p>Emissions of volatile <span class="hlt">mercury</span> species from natural soils are believed to be a significant contributor to the atmospheric burden of <span class="hlt">mercury</span>, but only order-of-magnitude estimates of emissions from these sources are available. The scaling-up of <span class="hlt">mercury</span> flux measurements to regional or global scales is confounded by a limited understanding of the physical, chemical and biochemical processes that occur in the soil, a complex environmental matrix. This study is a first step toward the development of an air-surface exchange model for <span class="hlt">mercury</span> (known as the <span class="hlt">mercury</span> emission model (MEM)). The objective of the study is to model the partitioning and movement of inorganic Hg(II) and Hg(0) in open field soils, and to use MEM to interpret published data on <span class="hlt">mercury</span> emissions to the atmosphere. MEM is a multi-layered, dynamic finite-element soil and atmospheric surface-layer model that simulates the exchange of heat, moisture and <span class="hlt">mercury</span> between soils and the atmosphere. The model includes a simple formulation of the reduction of inorganic Hg(II) to Hg(0). Good agreement was found between the meteorological dependence of observed <span class="hlt">mercury</span> emission fluxes, and hourly modelled fluxes, and it is concluded that MEM is able to simulate well the soil and atmospheric processes influencing the emission of Hg(0) to the atmosphere. The heretofore unexplained close correlation between soil temperature and <span class="hlt">mercury</span> emission flux is fully modelled by MEM and is attributed to the temperature dependence of the Hg(0) Henry's Law coefficient and the <span class="hlt">control</span> of the volumetric soil-air fraction on the diffusion of Hg(0) near the surface. The observed correlation between solar radiation intensity and <span class="hlt">mercury</span> flux, appears in part to be due to the surface-energy balance between radiation, and sensible and latent heat fluxes which determines the soil temperature. The modelled results imply that empirical correlations that are based only on flux chamber data, may not extend to the open atmosphere for all</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3138038','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3138038"><span><span class="hlt">Mercury</span> Levels in Locally Manufactured Mexican Skin-Lightening Creams</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Peregrino, Claudia P.; Moreno, Myriam V.; Miranda, Silvia V.; Rubio, Alma D.; Leal, Luz O.</p> <p>2011-01-01</p> <p><span class="hlt">Mercury</span> is considered one of the most toxic elements for plants and animals. Nevertheless, in the Middle East, Asia and Latin America, whitening creams containing <span class="hlt">mercury</span> are being manufactured and purchased, despite their obvious health risks. Due to the mass distribution of these products, this can be considered a global public health issue. In Mexico, these products are widely available in pharmacies, beauty aid and health stores. They are used for their skin lightening effects. The aim of this work was to analyze the <span class="hlt">mercury</span> content in some cosmetic whitening creams using the cold vapor technique coupled with atomic absorption spectrometry (CV-AAS). A total of 16 skin-lightening creams from the local market were investigated. No warning information was noted on the packaging. In 10 of the samples, no <span class="hlt">mercury</span> was detected. The <span class="hlt">mercury</span> content in six of the samples varied between 878 and 36,000 ppm, despite the fact that the U.S. Food and Drug Administration (FDA) has determined that the limit for <span class="hlt">mercury</span> in creams should be less than 1 ppm. Skin creams containing <span class="hlt">mercury</span> are still available and commonly used in Mexico and many developing countries, and their contents are poorly <span class="hlt">controlled</span>. PMID:21776243</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19296485','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19296485"><span>Strong adsorbability of <span class="hlt">mercury</span> ions on aniline/sulfoanisidine copolymer nanosorbents.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Xin-Gui; Feng, Hao; Huang, Mei-Rong</p> <p>2009-01-01</p> <p>The highest Hg-ion adsorbance so far, namely up to 2063 mg g(-1), has been achieved by poly(aniline-co-5-sulfo-2-anisidine) nanosorbents. Sorption of Hg ions occurs mainly by redox and chelation mechanisms (see scheme), but also by ion exchange and physisorption.Poly(aniline (AN)-co-5-sulfo-2-anisidine (SA)) nanoparticles were synthesized by chemical oxidative copolymerization of AN and SA monomers, and their extremely strong adsorption of <span class="hlt">mercury</span> ions in aqueous solution was demonstrated. The reactivity ratios of AN and SA comonomers were found to be 2.05 and 0.02, respectively. While AN monomer tends to homopolymerize, SA monomer tends to copolymerize with AN monomer because of the great steric hindrance and electron-attracting effect of the sulfo groups, despite the effect of conjugation of the methoxyl group with the benzene ring. The effects of initial <span class="hlt">mercury</span>(II) concentration, sorption time, sorption temperature, ultrasonic treatment, and sorbent dosage on <span class="hlt">mercury</span>-ion sorption onto AN/SA (50/50) copolymer nanoparticles with a number-average diameter of around 120 nm were significantly optimized. The results show that the maximum Hg-ion sorption capacity on the particulate nanosorbents can even reach 2063 mg of Hg per gram of sorbent, which would be the highest Hg-ion adsorbance so far. The sorption data fit to the Langmuir isotherm, and the process obeys pseudo-second-order kinetics. The IR and UV/Vis spectral data of the Hg-loaded copolymer particles suggest that some <span class="hlt">mercury</span>(II) was directly reduced by the copolymer to <span class="hlt">mercury</span>(I) and even <span class="hlt">mercury</span>(0). A mechanism of sorption between the particles and Hg ions in aqueous solution is proposed, and a physical/ion exchange/chelation/redox sorption ratio of around 2/3/<span class="hlt">45</span>/50 was found. Copolymer nanoparticles may be one of the most powerful and cost-effective sorbents of <span class="hlt">mercury</span> ions, with a wide range of potential applications for the efficient removal and even recovery of the <span class="hlt">mercury</span> ions from aqueous solution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3494773','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3494773"><span>Partially Overlapping Mechanisms of Language and <span class="hlt">Task</span> <span class="hlt">Control</span> in Young and Older Bilinguals</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Weissberger, Gali H.; Wierenga, Christina E.; Bondi, Mark W.; Gollan, Tamar H.</p> <p>2012-01-01</p> <p>The current study tested the hypothesis that bilinguals rely on domain-general mechanisms of executive <span class="hlt">control</span> to achieve language <span class="hlt">control</span> by asking if linguistic and nonlinguistic switching <span class="hlt">tasks</span> exhibit similar patterns of aging-related decline. Thirty young and 30 aging bilinguals completed a cued language-switching <span class="hlt">task</span> and a cued color-shape switching <span class="hlt">task</span>. Both <span class="hlt">tasks</span> demonstrated significant aging effects, but aging-related slowing and the aging-related increase in errors were significantly larger on the color-shape than on the language <span class="hlt">task</span>. In the language <span class="hlt">task</span>, aging increased language-switching costs in both response times and errors, and language-mixing costs only in response times. In contrast, the color-shape <span class="hlt">task</span> exhibited an aging-related increase in costs only in mixing errors. Additionally, a subset of the older bilinguals could not do the color-shape <span class="hlt">task</span>, but were able to do the language <span class="hlt">task</span>, and exhibited significantly larger language-switching costs than matched <span class="hlt">controls</span>. These differences, and some subtle similarities, in aging effects observed across <span class="hlt">tasks</span> imply that mechanisms of nonlinguistic <span class="hlt">task</span> and language <span class="hlt">control</span> are only partly shared and demonstrate relatively preserved language <span class="hlt">control</span> in aging. More broadly, these data suggest that age deficits in switching and mixing costs may depend on <span class="hlt">task</span> expertise, with mixing deficits emerging for less-practiced <span class="hlt">tasks</span> and switching deficits for highly practiced, possibly “expert” <span class="hlt">tasks</span> (i.e., language). PMID:22582883</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=277999&Lab=NHEERL&keyword=budget&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=277999&Lab=NHEERL&keyword=budget&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>A <span class="hlt">mercury</span> transport and fate model (LM2-<span class="hlt">mercury</span>) for mass budget assessment of <span class="hlt">mercury</span> cycling in Lake Michigan</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>LM2-<span class="hlt">Mercury</span>, a <span class="hlt">mercury</span> mass balance model, was developed to simulate and evaluate the transport, fate, and biogeochemical transformations of <span class="hlt">mercury</span> in Lake Michigan. The model simulates total suspended solids (TSS), disolved organic carbon (DOC), and total, elemental, divalent, ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/fs/2007/3071/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/fs/2007/3071/"><span>Investigating Atmospheric <span class="hlt">Mercury</span> with the U.S. Geological Survey Mobile <span class="hlt">Mercury</span> Laboratory</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kolker, Allan</p> <p>2007-01-01</p> <p>Atmospheric <span class="hlt">mercury</span> is thought to be an important source of <span class="hlt">mercury</span> present in fish, resulting in numerous local, statewide, tribal, and province-wide fish consumption advisories in the United States and Canada (U.S. Environmental Protection Agency, 2007a). To understand how <span class="hlt">mercury</span> occurs in the atmosphere and its potential to be transferred from the atmosphere to the biosphere, the U.S. Geological Survey (USGS) has been investigating sources and forms of atmospheric <span class="hlt">mercury</span>, especially in locations where the amount of <span class="hlt">mercury</span> deposited from precipitation is above average.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19740034854&hterms=mvm&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmvm','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19740034854&hterms=mvm&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmvm"><span>Simulation of flexible appendage interactions with Mariner Venus/<span class="hlt">Mercury</span> attitude <span class="hlt">control</span> and science platform pointing</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Fleischer, G. E.</p> <p>1973-01-01</p> <p>A new computer subroutine, which solves the attitude equations of motion for any vehicle idealized as a topological tree of hinge-connected rigid bodies, is used to simulate and analyze science instrument pointing <span class="hlt">control</span> interaction with a flexible Mariner Venus/<span class="hlt">Mercury</span> (MVM) spacecraft. The subroutine's user options include linearized or partially linearized hinge-connected models whose computational advantages are demonstrated for the MVM problem. Results of the pointing <span class="hlt">control</span>/flexible vehicle interaction simulations, including imaging experiment pointing accuracy predictions and implications for MVM science sequence planning, are described in detail.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63845&keyword=combustion+AND+H2O&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63845&keyword=combustion+AND+H2O&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>EFFECTS OF IRON CONTENT IN COAL COMBUSTION FLY ASHES ON SPECIATION OF <span class="hlt">MERCURY</span></span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The paper discusses the effects of iron content in coal combustion fly ashes on speciation of <span class="hlt">mercury</span>. (NOTE: The chemical form of <span class="hlt">mercury</span> species in combustion flue gases is an important influence on the <span class="hlt">control</span> of <span class="hlt">mercury</span> emissions from coal combustion). The study focused on th...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26174740','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26174740"><span>Data quality through a web-based QA/QC system: implementation for atmospheric <span class="hlt">mercury</span> data from the global <span class="hlt">mercury</span> observation system.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>D'Amore, Francesco; Bencardino, Mariantonia; Cinnirella, Sergio; Sprovieri, Francesca; Pirrone, Nicola</p> <p>2015-08-01</p> <p>The overall goal of the on-going Global <span class="hlt">Mercury</span> Observation System (GMOS) project is to develop a coordinated global monitoring network for <span class="hlt">mercury</span>, including ground-based, high altitude and sea level stations. In order to ensure data reliability and comparability, a significant effort has been made to implement a centralized system, which is designed to quality assure and quality <span class="hlt">control</span> atmospheric <span class="hlt">mercury</span> datasets. This system, GMOS-Data Quality Management (G-DQM), uses a web-based approach with real-time adaptive monitoring procedures aimed at preventing the production of poor-quality data. G-DQM is plugged on a cyberinfrastructure and deployed as a service. Atmospheric <span class="hlt">mercury</span> datasets, produced during the first-three years of the GMOS project, are used as the input to demonstrate the application of the G-DQM and how it identifies a number of key issues concerning data quality. The major issues influencing data quality are presented and discussed for the GMOS stations under study. Atmospheric <span class="hlt">mercury</span> data collected at the Longobucco (Italy) station is used as a detailed case study.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18569515','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18569515"><span>Biomarkers of <span class="hlt">mercury</span> exposure at a <span class="hlt">mercury</span> recycling facility in Ukraine.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gibb, Herman Jones; Kozlov, Kostj; Buckley, Jessie Poulin; Centeno, Jose; Jurgenson, Vera; Kolker, Allan; Conko, Kathryn; Landa, Edward; Panov, Boris; Panov, Yuri; Xu, Hanna</p> <p>2008-08-01</p> <p>This study evaluates biomarkers of occupational <span class="hlt">mercury</span> exposure among workers at a <span class="hlt">mercury</span> recycling operation in Gorlovka, Ukraine. The 29 study participants were divided into three occupational categories for analysis: (1) those who worked in the <span class="hlt">mercury</span> recycling operation (Group A, n = 8), (2) those who worked at the facility but not in the yard where the recycling was done (Group B, n = 14), and (3) those who did not work at the facility (Group C, n = 7). Urine, blood, hair, and nail samples were collected from the participants, and a questionnaire was administered to obtain data on age, gender, occupational history, smoking, alcohol consumption, fish consumption, tattoos, dental amalgams, home heating system, education, source of drinking water, and family employment in the former <span class="hlt">mercury</span> mine/smelter located on the site of the recycling facility. Each factor was tested in a univariate regression with total <span class="hlt">mercury</span> in urine, blood, hair, and nails. Median biomarker concentrations were 4.04 microg/g-Cr (urine), 2.58 microg/L (blood), 3.95 microg/g (hair), and 1.16 microg/g (nails). Occupational category was significantly correlated (p < 0.001) with both blood and urinary <span class="hlt">mercury</span> concentrations but not with hair or nail <span class="hlt">mercury</span>. Four individuals had urinary <span class="hlt">mercury</span> concentrations in a range previously found to be associated with subtle neurological and subjective symptoms (e.g., fatigue, loss of appetite, irritability), and one worker had a urinary <span class="hlt">mercury</span> concentration in a range associated with a high probability of neurological effects and proteinuria. Comparison of results by occupational category found that workers directly involved with the recycling operation had the highest blood and urinary <span class="hlt">mercury</span> levels. Those who worked at the facility but were not directly involved with the recycling operation had higher levels than those who did not work at the facility.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70031905','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70031905"><span>Biomarkers of <span class="hlt">mercury</span> exposure at a <span class="hlt">mercury</span> recycling facility in Ukraine</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Gibb, H.J.; Kozlov, K.; Buckley, J.P.; Centeno, J.; Jurgenson, V.; Kolker, A.; Conko, K.; Landa, E.; Panov, B.; Panov, Y.; Xu, H.</p> <p>2008-01-01</p> <p>This study evaluates biomarkers of occupational <span class="hlt">mercury</span> exposure among workers at a <span class="hlt">mercury</span> recycling operation in Gorlovka, Ukraine. The 29 study participants were divided into three occupational categories for analysis: (1) those who worked in the <span class="hlt">mercury</span> recycling operation (Group A, n = 8), (2) those who worked at the facility but not in the yard where the recycling was done (Group B, n = 14), and (3) those who did not work at the facility (Group C, n = 7). Urine, blood, hair, and nail samples were collected from the participants, and a questionnaire was administered to obtain data on age, gender, occupational history, smoking, alcohol consumption, fish consumption, tattoos, dental amalgams, home heating system, education, source of drinking water, and family employment in the former <span class="hlt">mercury</span> mine/smelter located on the site of the recycling facility. Each factor was tested in a univariate regression with total <span class="hlt">mercury</span> in urine, blood, hair, and nails. Median biomarker concentrations were 4.04 ??g/g-Cr (urine), 2.58 ??g/L (blood), 3.95 ??g/g (hair), and 1.16 ??g/g (nails). Occupational category was significantly correlated (p < 0.001) with both blood and urinary <span class="hlt">mercury</span> concentrations but not with hair or nail <span class="hlt">mercury</span>. Four individuals had urinary <span class="hlt">mercury</span> concentrations in a range previously found to be associated with subtle neurological and subjective symptoms (e.g., fatigue, loss of appetite, irritability), and one worker had a urinary <span class="hlt">mercury</span> concentration in a range associated with a high probability of neurological effects and proteinuria. Comparison of results by occupational category found that workers directly involved with the recycling operation had the highest blood and urinary <span class="hlt">mercury</span> levels. Those who worked at the facility but were not directly involved with the recycling operation had higher levels than those who did not work at the facility. Copyright ?? 2008 JOEH, LLC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/sir/2006/5264/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/sir/2006/5264/"><span><span class="hlt">Mercury</span> Flow Through the <span class="hlt">Mercury</span>-Containing Lamp Sector of the Economy of the United States</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Goonan, Thomas G.</p> <p>2006-01-01</p> <p>Introduction: This Scientific Investigations Report examines the flow of <span class="hlt">mercury</span> through the <span class="hlt">mercury</span>-containing lamp sector of the U.S. economy in 2001 from lamp manufacture through disposal or recycling. <span class="hlt">Mercury</span>-containing lamps illuminate commercial and industrial buildings, outdoor areas, and residences. <span class="hlt">Mercury</span> is an essential component in fluorescent lamps and high-intensity discharge lamps (high-pressure sodium, <span class="hlt">mercury</span>-vapor, and metal halide). A typical fluorescent lamp is composed of a phosphor-coated glass tube with electrodes located at either end. Only a very small amount of the <span class="hlt">mercury</span> is in vapor form. The remainder of the <span class="hlt">mercury</span> is in the form of either liquid <span class="hlt">mercury</span> metal or solid <span class="hlt">mercury</span> oxide (<span class="hlt">mercury</span> oxidizes over the life of the lamp). When voltage is applied, the electrodes energize the <span class="hlt">mercury</span> vapor and cause it to emit ultraviolet energy. The phosphor coating absorbs the ultraviolet energy, which causes the phosphor to fluoresce and emit visible light. <span class="hlt">Mercury</span>-containing lamps provide more lumens per watt than incandescent lamps and, as a result, require from three to four times less energy to operate. <span class="hlt">Mercury</span> is persistent and toxic within the environment. <span class="hlt">Mercury</span>-containing lamps are of environmental concern because they are widely distributed throughout the environment and are easily broken in handling. The magnitude of lamp sector <span class="hlt">mercury</span> emissions, estimated to be 2.9 metric tons per year (t/yr), is small compared with the estimated <span class="hlt">mercury</span> losses of the U.S. coal-burning and chlor-alkali industries, which are about 70 t/yr and about 90 t/yr, respectively.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27363134','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27363134"><span>[<span class="hlt">Mercury</span> Transport from Glacier to Runoff in Typical Inland Glacial Area in the Tibetan Plateau].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sun, Xue-jun; Wang, Kang; Guo, Jun-ming; Kang, Shi-chang; Zhang, Guo-shuai; Huang, Jie; Cong, Zhi-yuan; Zhang, Qiang-gong</p> <p>2016-02-15</p> <p>To investigate the transport of <span class="hlt">mercury</span> from glacier to runoff in typical inland glacial area in the Tibetan Plateau, we selected Zhadang glacier and Qugaqie river Basin located in the Nyainqentanglha Range region and collected samples from snow pit, glacier melt-water and Qugaqie river water during 15th August to 9'h September 2011. <span class="hlt">Mercury</span> speciation and concentrations were determined and their distribution and <span class="hlt">controlling</span> factors in different environmental compartments were analyzed. The results showed that the average THg concentrations were (3.79 +/- 5.12) ng x L(-1), (1.06 +/- 0.77) ng x L(-1) and (1.02 +/- 0.24) ng x L(-1) for glacier snow, glacier melt-water and Qugaqie river water, respectively, all of which were at the global background levels. Particulate-bound <span class="hlt">mercury</span> accounted for large proportion of <span class="hlt">mercury</span> in all environmental matrices, while <span class="hlt">mercury</span> in glacial melt-water was <span class="hlt">controlled</span> by total suspended particle, and <span class="hlt">mercury</span> in Qugaqie river water co-varied with runoff. With the increase of temperature, glacier melted and released water as well as <span class="hlt">mercury</span> into glacier-fed river. Total <span class="hlt">mercury</span> concentrations in glacier melt water, upstream and downstream peaked at 14:00, 16:00 and after 20:00, respectively, reflecting the process of <span class="hlt">mercury</span> release from glacier and its subsequent transport in the glacier fed river. The transport of riverine <span class="hlt">mercury</span> was <span class="hlt">controlled</span> by multiple factors. Under the context of climate change, glacier ablation and the increasing runoff will play increasingly important roles in <span class="hlt">mercury</span> release and transport.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AGUFMGC31B1127L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AGUFMGC31B1127L"><span>Multi-decadal Dynamics of <span class="hlt">Mercury</span> in a Complex Ecosystem</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Levin, L.</p> <p>2016-12-01</p> <p>A suite of air quality and watershed models was applied to track the ecosystem contributions of <span class="hlt">mercury</span> (Hg), as well as arsenic (As), and selenium (Se) from local and global sources to the San Juan River basin in the Four Corners region of the American Southwest. Long-term changes in surface water and fish tissue <span class="hlt">mercury</span> concentrations were also simulated, out to the year 2074.Atmospheric <span class="hlt">mercury</span> was modeled using a nested, spatial-scale modeling system comprising GEOS-Chem (global scale) and CMAQ-APT (national and regional) models. Four emission scenarios were modeled, including two growth scenarios for Asian <span class="hlt">mercury</span> emissions. Results showed that the average <span class="hlt">mercury</span> deposition over the San Juan basin was 21 µg/m2-y. Source contributions to <span class="hlt">mercury</span> deposition range from 2% to 9% of total deposition prior to post-2016 U.S. <span class="hlt">controls</span> for air toxics regulatory compliance. Most of the contributions to <span class="hlt">mercury</span> deposition in the basin are from non-U.S. sources. Watershed simulations showed power plant contributions to fish tissue <span class="hlt">mercury</span> never exceeded 0.035% during the 85-year model simulation period, even with the long-term growth in fish tissue <span class="hlt">mercury</span> over that period. Local coal-fired power plants contributed relatively small fractions to <span class="hlt">mercury</span> deposition (less than 4%) in the basin; background and non-U.S. anthropogenic sources dominated. Fish-tissue <span class="hlt">mercury</span> levels are projected to increase through 2074 due to growth projections for non-U.S. emission sources. The most important contributor to methylmercury in the lower reaches of the watershed was advection of MeHg produced in situ at upstream headwater locations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29698443','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29698443"><span>Representation <span class="hlt">control</span> increases <span class="hlt">task</span> efficiency in complex graphical representations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Moritz, Julia; Meyerhoff, Hauke S; Meyer-Dernbecher, Claudia; Schwan, Stephan</p> <p>2018-01-01</p> <p>In complex graphical representations, the relevant information for a specific <span class="hlt">task</span> is often distributed across multiple spatial locations. In such situations, understanding the representation requires internal transformation processes in order to extract the relevant information. However, digital technology enables observers to alter the spatial arrangement of depicted information and therefore to offload the transformation processes. The objective of this study was to investigate the use of such a representation <span class="hlt">control</span> (i.e. the users' option to decide how information should be displayed) in order to accomplish an information extraction <span class="hlt">task</span> in terms of solution time and accuracy. In the representation <span class="hlt">control</span> condition, the participants were allowed to reorganize the graphical representation and reduce information density. In the <span class="hlt">control</span> condition, no interactive features were offered. We observed that participants in the representation <span class="hlt">control</span> condition solved <span class="hlt">tasks</span> that required reorganization of the maps faster and more accurate than participants without representation <span class="hlt">control</span>. The present findings demonstrate how processes of cognitive offloading, spatial contiguity, and information coherence interact in knowledge media intended for broad and diverse groups of recipients.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5919614','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5919614"><span>Representation <span class="hlt">control</span> increases <span class="hlt">task</span> efficiency in complex graphical representations</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Meyerhoff, Hauke S.; Meyer-Dernbecher, Claudia; Schwan, Stephan</p> <p>2018-01-01</p> <p>In complex graphical representations, the relevant information for a specific <span class="hlt">task</span> is often distributed across multiple spatial locations. In such situations, understanding the representation requires internal transformation processes in order to extract the relevant information. However, digital technology enables observers to alter the spatial arrangement of depicted information and therefore to offload the transformation processes. The objective of this study was to investigate the use of such a representation <span class="hlt">control</span> (i.e. the users' option to decide how information should be displayed) in order to accomplish an information extraction <span class="hlt">task</span> in terms of solution time and accuracy. In the representation <span class="hlt">control</span> condition, the participants were allowed to reorganize the graphical representation and reduce information density. In the <span class="hlt">control</span> condition, no interactive features were offered. We observed that participants in the representation <span class="hlt">control</span> condition solved <span class="hlt">tasks</span> that required reorganization of the maps faster and more accurate than participants without representation <span class="hlt">control</span>. The present findings demonstrate how processes of cognitive offloading, spatial contiguity, and information coherence interact in knowledge media intended for broad and diverse groups of recipients. PMID:29698443</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70012594','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70012594"><span>Resource estimation from historical data: <span class="hlt">Mercury</span>, a test case</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Cargill, S.M.; Root, D.H.; Bailey, E.H.</p> <p>1980-01-01</p> <p>A simple technique based on historical records of tonnage and grade of ore produced provides a means for calculating how much of a mineral product will be available in the future at various average grades. Estimates made on this basis are independent of geologic considerations or changing economic and political factors, although they are based on mining history, which was largely determined by these factors. The relatively minor element, <span class="hlt">mercury</span>, was used for the test case reported here, but the method has been found applicable to forecasts of resources for other mineral products. <span class="hlt">Mercury</span> resources available in ore in which the average grade is as low as 0.1% are estimated to be 53 ??106kg (1.5 ??106flasks) for the United States and 1551 ??106kg (<span class="hlt">45</span> ??106flasks) for the world; this amount is more than adequate to meet predicted demand to the year 2000. The expectable price of <span class="hlt">mercury</span> in 1978 dollars at this 0.1% grade is projected to be $58.75 per kg ($2,025 per flask), but at a 10% annual inflation rate, it would be more than $12,000 per flask. To satisfy just the projected U.S. demand for <span class="hlt">mercury</span> by 2000, the price is calculated to be $48.96 per kg ($1,688 per flask) in 1978 dollars at an average annual grade of 0.12%. ?? 1980 Plenum Publishing Corporation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016ArMiS..61..473B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016ArMiS..61..473B"><span><span class="hlt">Mercury</span> in Bituminous Coal Used in Polish Power Plants</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Burmistrz, Piotr; Kogut, Krzysztof</p> <p>2016-09-01</p> <p>Poland is a country with the highest anthropogenic <span class="hlt">mercury</span> emission in the European Union. According to the National Centre for Emissions Management (NCEM) estimation yearly emission exceeds 10 Mg. Within that approximately 56% is a result of energetic coal combustion. In 121 studied coal samples from 30 coal mines an average <span class="hlt">mercury</span> content was 112.9 ppb with variation between 30 and 321 ppb. These coals have relatively large contents of chlorine and bromine. Such chemical composition is benefitial to formation of oxidized <span class="hlt">mercury</span> Hg2+, which is easier to remove in Air Pollution <span class="hlt">Control</span> Devices. The Hgr/Qir (<span class="hlt">mercury</span> content to net calorific value in working state) ratio varied between 1.187 and 13.758 g Hg · TJ-1, and arithmetic mean was 4.713 g Hg · TJ-1. Obtained results are close to the most recent NCEM <span class="hlt">mercury</span> emission factor of 1.498 g Hg · TJ-1. Value obtained by us is more reliable that emission factor from 2011 (6.4 g Hg · TJ-1), which caused overestimation of <span class="hlt">mercury</span> emission from energetic coal combustion.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/of/2001/0336/pdf/of01-336.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/of/2001/0336/pdf/of01-336.pdf"><span>Geochemistry of selected <span class="hlt">mercury</span> mine-tailings in the Parkfield <span class="hlt">Mercury</span> District, California</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Rytuba, James J.; Kotlyar, Boris B.; Wilkerson, Gregg; Olson, Jerry</p> <p>2001-01-01</p> <p>The Parkfield <span class="hlt">mercury</span> district is located in the southern part of the California Coast Range <span class="hlt">mercury</span> mineral belt and contains three silica-carbonate-type <span class="hlt">mercury</span> deposits that have had significant <span class="hlt">mercury</span> production. <span class="hlt">Mercury</span> was first produced in the district in 1873, but the main period of production occurred from 1915-1922. Total production from the district is about 5,000 flasks of <span class="hlt">mercury</span> (a flask equals 76 pounds of <span class="hlt">mercury</span>) with most production coming from the Patriquin mine (1,875 flasks), and somewhat less from the King (1,600 flasks) and Dawson (1,470 flasks) mines. Several other small prospects and mines occur in the district but only minor production has come from them. In 1969, Phelan Sulphur Company carried out mineral exploration at the King mine and announced the discovery of 55,000 tons of <span class="hlt">mercury</span> ore with an average grade of 5.2 pounds per ton. The King mine is located on federal land administered by the U.S. Bureau of Land Management. Several other parcels of federal land are present adjacent to other mines and prospects in the Parkfield district. An environmental assessment of mine sites on and adjacent to federal land was carried out to determine the amount of <span class="hlt">mercury</span> and other trace metals present in mine wastes and in sediments from streams impacted by past mining.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70161824','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70161824"><span>Retention of <span class="hlt">mercury</span> by salmon</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Amend, Donald F.</p> <p>1970-01-01</p> <p>Consuming fish that have been exposed repeatedly to <span class="hlt">mercury</span> derivatives is a potential public health hazard because fish can accumulate and retain <span class="hlt">mercury</span> in their tissues (Rucker, 1968). Concern has been expressed in the United States because <span class="hlt">mercurials</span> have been used extensively in industry and as prophylactic and therapeutic agents in fish hatcheries. Rucker and Amend (1969) showed that yearling rainbow trout (Salmo gairdneri) and chinook salmon (Oncorhynchus tshawytscha) exposed to <span class="hlt">mercurials</span> accumulated excessive amounts of <span class="hlt">mercury</span> in many tissues. Further, Rucker and Amend (1969) concluded that wild fish that ate <span class="hlt">mercury</span>-contaminated fish also could contain high <span class="hlt">mercury</span> levels. Although <span class="hlt">mercury</span> was eliminated from most tissues within several months, substantial levels remained in the kidney for more than 33 weeks after the last exposure. Since high levels of <span class="hlt">mercury</span> can be retained in the kidney for an undetermined time, it is possible that returning adult salmon exposed to <span class="hlt">mercurials</span> as juveniles could constitute a potential hazard to public health. The purpose of this study was to determine whether such fish contained high residual levels of <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/135030','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/135030"><span>Detection of concealed <span class="hlt">mercury</span> with thermal neutrons</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Bell, Z.W.</p> <p>1994-08-18</p> <p>In the United States today, governments at all levels and the citizenry are paying increasing attention to the effects, both real and hypothetical, of industrial activity on the environment. Responsible modem industries, reflecting this heightened public and regulatory awareness, are either substituting benign materials for hazardous ones, or using hazardous materials only under carefully <span class="hlt">controlled</span> conditions. In addition, present-day environmental consciousness dictates that we deal responsibly with legacy wastes. The decontamination and decommissioning (D&D) of facilities at which <span class="hlt">mercury</span> was used or processed presents a variety of challenges. Elemental <span class="hlt">mercury</span> is a liquid at room temperature and readily evaporates inmore » air. In large <span class="hlt">mercury</span>-laden buildings, droplets may evaporate from one area only to recondense in other cooler areas. The rate of evaporation is a function of humidity and temperature; consequently, different parts of a building may be sources or sinks of <span class="hlt">mercury</span> at different times of the day or even the year. Additionally, although <span class="hlt">mercury</span> oxidizes in air, the oxides decompose upon heating. Hence, oxides contained within pipes or equipment, may be decomposed when those pipes and equipment are cut with saws or torches. Furthermore, <span class="hlt">mercury</span> seeps through the pores and cracks in concrete blocks and pads, and collects as puddles and blobs in void spaces within and under them.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21229731','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21229731"><span>[Distribution characteristics of particulate <span class="hlt">mercury</span> in aerosol in coastal city].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Fu-Wang; Zhao, Jin-Ping; Chen, Jin-Sheng; Xu, Ya</p> <p>2010-10-01</p> <p>Particulate <span class="hlt">mercury</span>, which is bound with aerosol in atmosphere, has a negative impact on human health and the environment, also plays an important role in the biogeochemical process of <span class="hlt">mercury</span>. In this paper, taking southeast coastal city of Xiamen as research object, the PM2.5, PM10 and TSP were collected in residential, tourism, industrial area and background, respectively, during four seasons (October 2008-September 2009). RA-915 + <span class="hlt">mercury</span> analyzer was employed to determinate <span class="hlt">mercury</span> concentration in different size particle matters based on zeeman atomic absorption spectrometry. The results showed that the contents of particulate <span class="hlt">mercury</span> in different size of aerosol during Winter, Spring were obviously higher than that of Summer, Autumn; the concentrations of particulate <span class="hlt">mercury</span> in fine particle during Spring, Summer, Autumn and Winter were (51.46 +/- 19.28), (42.41 +/- 12.74), (38.38 +/- 6.08) and (127.23 +/- 33.70) pg/m3, respectively. The experimental data showed that the particulate <span class="hlt">mercury</span> were mainly distributed in fine particles (PM2.5), which covered 42.48%-67.87%, and it can be concluded that the rate of particulate <span class="hlt">mercury</span> enrichment in coarse particle was much lower than that of fine particle. The sequence of atmospheric particulate <span class="hlt">mercury</span> concentration in different functional areas was: background < resident < tourism < industrial area < suburban; which showed characteristics of spatial distribution of particulate <span class="hlt">mercury</span> was affected by the sampling location. On the whole, Xiamen had a low level of atmospheric particulate <span class="hlt">mercury</span>; the enrichment of PM2.5 to particulate <span class="hlt">mercury</span> was significantly higher than that of PM10 and TSP, and showed that fine particle pollution should be tightly <span class="hlt">controlled</span> to reduce particulate <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17..895Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17..895Z"><span><span class="hlt">Mercury</span> emissions from coal combustion in Silesia, analysis using geostatistics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zasina, Damian; Zawadzki, Jaroslaw</p> <p>2015-04-01</p> <p>://www.ceip.at/. [3] Zyśk J., Wyrwa A. and Pluta M. Emissions of <span class="hlt">mercury</span> from the power sector in Poland. Atmospheric Environment, <span class="hlt">45</span>:605-610, 2011. http://dx.doi.org/10.1016/j.atmosenv.2010.10.041/. [4] Głodek A., Pacyna J. <span class="hlt">Mercury</span> emission from coal-fired power plants in Poland. Atmospheric Environment, 43:5668-5673, 2009. http://dx.doi.org/10.1016/j.atmosenv.2009.07.041. [5] NCEM. National emission database, 2014. NCEM Management at the IEP-NRI. [6] Zasina D. and Zawadzki J. Disaggregation problems using data derived from polish air pollutant emission management system, Systems Supporting Production Engineering. Review of Problems and Solutions, ISBN 978-83-937845-9-2, pp. 128-137, 2014. [7] EUROSTAT. EUROSTAT Energy Database, 2014. [8] Wackernagel H. Basics in Geostatistics 3 Geostatistical Monte-Carlo methods: Conditional simulation, 2013.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17517388','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17517388"><span><span class="hlt">Mercury</span> speciation and emissions from coal combustion in Guiyang, Southwest China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tang, Shunlin; Feng, Xinbin; Qiu, Jianrong; Yin, Guoxun; Yang, Zaichan</p> <p>2007-10-01</p> <p>Although China has been regarded as one of the largest anthropogenic <span class="hlt">mercury</span> emission source with coal combustion, so far the actual measurements of Hg species and Hg emissions from the combustion and the capture of Hg in Chinese emission <span class="hlt">control</span> devices were very limited. Aiming at Hg <span class="hlt">mercury</span> species measurements in Guiyang, the capital city of Guizhou province in Southwest China, we studied flue gases of medium-to-small-sized industrial steam coal-firing boiler (10-30 t/h) with no <span class="hlt">control</span> devices, medium-to-small-sized industrial steam coal-firing boiler with WFGD and large-scale coal combustion with ESPs using Ontario Hytro method. We obtained <span class="hlt">mercury</span> emission factors of the three representative coal combustion and estimated <span class="hlt">mercury</span> emissions in Guiyang in 2003, as well as the whole province from 1986 to 2002. Coal combustion in Guiyang emitted 1898 kg <span class="hlt">mercury</span> to the atmosphere, of which 36% Hg is released from power plants, 41% from industrial coal combustion, and 23% from domestic users, and 267 kg is Hg(p), 813 kg is Hg(2+) and 817 kg is Hg0. <span class="hlt">Mercury</span> emission in Guizhou province increased sharply from 5.8 t in 1986 to 16.4 t in 2002. With the implementation of national economic strategy of China's Western Development, the annual <span class="hlt">mercury</span> emission from coal combustion in the province is estimated to be about 32 t in 2015.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29396333','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29396333"><span>Spatial variation of <span class="hlt">mercury</span> bioaccumulation in bats of Canada linked to atmospheric <span class="hlt">mercury</span> deposition.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chételat, John; Hickey, M Brian C; Poulain, Alexandre J; Dastoor, Ashu; Ryjkov, Andrei; McAlpine, Donald; Vanderwolf, Karen; Jung, Thomas S; Hale, Lesley; Cooke, Emma L L; Hobson, Dave; Jonasson, Kristin; Kaupas, Laura; McCarthy, Sara; McClelland, Christine; Morningstar, Derek; Norquay, Kaleigh J O; Novy, Richard; Player, Delanie; Redford, Tony; Simard, Anouk; Stamler, Samantha; Webber, Quinn M R; Yumvihoze, Emmanuel; Zanuttig, Michelle</p> <p>2018-06-01</p> <p>Wildlife are exposed to neurotoxic <span class="hlt">mercury</span> at locations distant from anthropogenic emission sources because of long-range atmospheric transport of this metal. In this study, <span class="hlt">mercury</span> bioaccumulation in insectivorous bat species (Mammalia: Chiroptera) was investigated on a broad geographic scale in Canada. Fur was analyzed (n=1178) for total <span class="hlt">mercury</span> from 43 locations spanning 20° latitude and 77° longitude. Total <span class="hlt">mercury</span> and methylmercury concentrations in fur were positively correlated with concentrations in internal tissues (brain, liver, kidney) for a small subset (n=21) of little brown bats (Myotis lucifugus) and big brown bats (Eptesicus fuscus), validating the use of fur to indicate internal <span class="hlt">mercury</span> exposure. Brain methylmercury concentrations were approximately 10% of total <span class="hlt">mercury</span> concentrations in fur. Three bat species were mainly collected (little brown bats, big brown bats, and northern long-eared bats [M. septentrionalis]), with little brown bats having lower total <span class="hlt">mercury</span> concentrations in their fur than the other two species at sites where both species were sampled. On average, juvenile bats had lower total <span class="hlt">mercury</span> concentrations than adults but no differences were found between males and females of a species. Combining our dataset with previously published data for eastern Canada, median total <span class="hlt">mercury</span> concentrations in fur of little brown bats ranged from 0.88-12.78μg/g among 11 provinces and territories. Highest concentrations were found in eastern Canada where bats are most endangered from introduced disease. Model estimates of atmospheric <span class="hlt">mercury</span> deposition indicated that eastern Canada was exposed to greater <span class="hlt">mercury</span> deposition than central and western sites. Further, mean total <span class="hlt">mercury</span> concentrations in fur of adult little brown bats were positively correlated with site-specific estimates of atmospheric <span class="hlt">mercury</span> deposition. This study provides the largest geographic coverage of <span class="hlt">mercury</span> measurements in bats to date and indicates that atmospheric</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/381041','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/381041"><span>Design, components, <span class="hlt">controls</span> and operational experience of <span class="hlt">mercury</span> circuits</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Lielausis, O.</p> <p>1996-06-01</p> <p>The main activities of the Institute of Physics are connected with magnetohydrodynamics of incompressible media, first at all, liquid metals. Along side with Li, Na, NaK and low temperature eutectic InGaSn, <span class="hlt">mercury</span> serves as one of the best working medium. A special Hg laboratory complex was built including a 350 m{sup 2} experimental hall. The amount of Hg in use reaches 8x10{sup 3} kg. As an important practical result the development and production of different electromagnetic pumps for heavy metals (Hg, Pb, Bi, Zn, Sn, InGaSn, steel) can be considered. The same can be said about new technologies for Hgmore » chemical treatment (purification). <span class="hlt">Mercury</span> is used as an effective modeling material for the investigation of a great number of metallurgical processes, as well as for thermohydraulic testing of systems, proposed for other (more aggressive or high temperature) heavy liquid metals. The laboratory is equipped with three easy transferable d=3-5 cm <span class="hlt">mercury</span> loops as well as with a large closed 12 m long d=10 cm stationary loop. The electromagnetic feeding pump delivers 5 l/s at 5 atm. The loading <span class="hlt">mercury</span> weights 4.7x10{sup 3} kg. For investigation in magnetohydrodynamics a 2 m long solenoid calculated for a 2 T magnetic field in a d=20cm bore is used, as well as an electromagnet providing 1.5 T in a 15 cm gap between round d=50 cm poles. Since in the case of Hg almost all traditional measuring techniques (including thermoanemometry) can be applied, complex physical problems can be considered. So, results gained in this laboratory, served as a base for ideas about 2D MHD turbulence, possessing all the strange features predicted by theory for 2D turbulence. So, recently it was showed that by means of an outer magnetic field the intensity of heat transfer can be enhanced by an order compared with an ordinary turbulent motion outside the field. Detailed modeling of heat transfer processes typical to the liquid metal blanket of proposed thermonuclear reactors was</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1569325','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1569325"><span><span class="hlt">Mercury</span> in human hair due to environment and diet: a review.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Airey, D</p> <p>1983-01-01</p> <p>Hair <span class="hlt">mercury</span> levels increase with the amount of fish in the diet and the amount of <span class="hlt">mercury</span> in the fish species consumed. If hair <span class="hlt">mercury</span> levels in people throughout the world were monitored by a standard analytical procedure, the results would indicate locations where people's body burden of <span class="hlt">mercury</span> is high enough to be subclinically unhealthy and where <span class="hlt">controls</span> on environmental emissions might be beneficial. The relationship of hair <span class="hlt">mercury</span> concentration to the method of sampling and analysis of hair, the analysis of the results, the amount of fish consumed, the country and location from which samples were taken and the age, sex and occupation of the donor is discussed. PMID:6653535</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70009804','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70009804"><span>Moon-<span class="hlt">Mercury</span>: Large impact structures, isostasy and average crustal viscosity</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Schaber, G.G.; Boyce, J.M.; Trask, N.J.</p> <p>1977-01-01</p> <p>Thirty-five craters and basins larger than 200 km in diameter are recognized on the imaged portion (<span class="hlt">45</span>%) of <span class="hlt">Mercury</span>. If the unimaged portion of the planet is similarly cratered, a total of 78 such impact features may be present. Sixty-two craters and basins 200 km in diameter are recognized on the moon, a body with only half the cross-sectional area of <span class="hlt">Mercury</span>. If surface areas are considered, however, <span class="hlt">Mercury</span> is cratered only 70% as densely as the moon. The density of impact craters with diameters greater than 400 km on <span class="hlt">Mercury</span> is only 30% of that on the moon, and for craters with diameters between 400 and 700 km, the density on <span class="hlt">Mercury</span> is only 21% of the lunar crater density. The size-frequency distribution curve for the large Mercurian craters follows the same cumulative -2 slope as the lunar curve but lies well below the 10% surface saturation level characteristic of the lunar curve. This is taken as evidence that the old heavily cratered terrain on <span class="hlt">Mercury</span> is, at least presently, not in a state of cratering equilibrium. The reduced density of large craters and basins on <span class="hlt">Mercury</span> relative to the moon could be either a function of the crater-production rates on these bodies or an effect of different crustal histories. Resurfacing of the planet after the basin-forming period is ruled out by the presence of 54 craters and basins 100 km in diameter and larger (on the imaged portion of <span class="hlt">Mercury</span>) that have either well-defined or poorly-defined secondary-crater fields. Total isostatic compensation of impact craters ???800 km in diameter indicates that the average viscosity of the Mercurian crust over the past 4+ aeons was the same as that for the moon (???1026.5 P). This calculated viscosity and the distribution of large craters and basins suggest that either the very early crustal viscosity on <span class="hlt">Mercury</span> was less than that of the moon and the present viscosity greater, or the differences in large crater populations on the two bodies is indeed the result of variations in</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11822127','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11822127"><span>[Amalgam. IV. Metabolism of <span class="hlt">mercury</span>].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gladys, S; van Meerbeek, B; Vanherle, G; Lambrechts, P</p> <p>1993-04-01</p> <p>After absorption in the body by four ways, each type of <span class="hlt">mercury</span> undergoes a specific metabolism. Elementary <span class="hlt">mercury</span> as <span class="hlt">mercury</span> vapour becomes rapidly oxidized to Hg2+ and, afterwards, is metabolized as an inorganic <span class="hlt">mercurial</span> compound. From the blood circulation <span class="hlt">mercury</span> reaches target organs like the kidneys, the central nervous system, the liver and the hypophysis, in which <span class="hlt">mercury</span> accumulates. The retention time varies by organ and is longest in the brain. <span class="hlt">Mercury</span> is mainly eliminated with urine and faeces, to a lesser degree with transpiration and mother's milk and sometimes by respiration.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013ACPD...1312771C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013ACPD...1312771C"><span>Method development estimating ambient <span class="hlt">mercury</span> concentration from monitored <span class="hlt">mercury</span> wet deposition</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chen, S. M.; Qiu, X.; Zhang, L.; Yang, F.; Blanchard, P.</p> <p>2013-05-01</p> <p>Speciated atmospheric <span class="hlt">mercury</span> data have recently been monitored at multiple locations in North America; but the spatial coverage is far less than the long-established <span class="hlt">mercury</span> wet deposition network. The present study describes a first attempt linking ambient concentration with wet deposition using Beta distribution fitting of a ratio estimate. The mean, median, mode, standard deviation, and skewness of the fitted Beta distribution parameters were generated using data collected in 2009 at 11 monitoring stations. Comparing the normalized histogram and the fitted density function, the empirical and fitted Beta distribution of the ratio shows a close fit. The estimated ambient <span class="hlt">mercury</span> concentration was further partitioned into reactive gaseous <span class="hlt">mercury</span> and particulate bound <span class="hlt">mercury</span> using linear regression model developed by Amos et al. (2012). The method presented here can be used to roughly estimate <span class="hlt">mercury</span> ambient concentration at locations and/or times where such measurement is not available but where wet deposition is monitored.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70010854','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70010854"><span>Determination of mercurous chloride and total <span class="hlt">mercury</span> in <span class="hlt">mercury</span> ores</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Fahey, J.J.</p> <p>1937-01-01</p> <p>A method for the determination of mercurous chloride and total <span class="hlt">mercury</span> on the same sample is described. The <span class="hlt">mercury</span> minerals are volatilized in a glass tube and brought into intimate contact with granulated sodium carbonate. The chlorine is fixed as sodium chloride, determined with silver nitrate, and computed to mercurous chloride. The <span class="hlt">mercury</span> is collected on a previously weighed gold coil and weighed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23268373','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23268373"><span>The assessment of postural <span class="hlt">control</span> and the influence of a secondary <span class="hlt">task</span> in people with anterior cruciate ligament reconstructed knees using a Nintendo Wii Balance Board.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Howells, Brooke E; Clark, Ross A; Ardern, Clare L; Bryant, Adam L; Feller, Julian A; Whitehead, Timothy S; Webster, Kate E</p> <p>2013-09-01</p> <p>Postural <span class="hlt">control</span> impairments may persist following anterior cruciate ligament (ACL) reconstruction. The effect of a secondary <span class="hlt">task</span> on postural <span class="hlt">control</span> has, however, not been determined. The purpose of this case-<span class="hlt">control</span> study was to compare postural <span class="hlt">control</span> in patients following ACL reconstruction with healthy individuals with and without a secondary <span class="hlt">task</span>. <span class="hlt">45</span> patients (30 men and 15 women) participated at least 6 months following primary ACL reconstruction surgery. Participants were individually matched by age, gender and sports activity to healthy <span class="hlt">controls</span>. Postural <span class="hlt">control</span> was measured using a Nintendo Wii Balance Board and customised software during static single-leg stance and with the addition of a secondary <span class="hlt">task</span>. The secondary <span class="hlt">task</span> required participants to match the movement of an oscillating marker by adducting and abducting their arm. Centre of pressure (CoP) path length in both medial-lateral and anterior-posterior directions, and CoP total path length. When compared with the <span class="hlt">control</span> group, the anterior-posterior path length significantly increased in the ACL reconstruction patients' operated (12.3%, p=0.02) and non-operated limbs (12.8%, p=0.02) for the single-<span class="hlt">task</span> condition, and the non-operated limb (11.5%, p=0.006) for the secondary <span class="hlt">task</span> condition. The addition of a secondary <span class="hlt">task</span> significantly increased CoP path lengths in all measures (p<0.001), although the magnitude of the increase was similar in both the ACL reconstruction and <span class="hlt">control</span> groups. ACL reconstruction patients showed a reduced ability in both limbs to <span class="hlt">control</span> the movement of the body in the anterior-posterior direction. The secondary <span class="hlt">task</span> affected postural <span class="hlt">control</span> by comparable amounts in patients after ACL reconstruction and healthy <span class="hlt">controls</span>. Devices for the objective measurement of postural <span class="hlt">control</span>, such as the one used in this study, may help clinicians to more accurately identify patients with deficits who may benefit from targeted neuromuscular training programs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27994559','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27994559"><span>Impaired Attentional <span class="hlt">Control</span> in Pedophiles in a Sexual Distractor <span class="hlt">Task</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jordan, Kirsten; Fromberger, Peter; von Herder, Jakob; Steinkrauss, Henrike; Nemetschek, Rebekka; Witzel, Joachim; Müller, Jürgen L</p> <p>2016-01-01</p> <p>Pedophilic disorder, a subtype of paraphilia, is defined as a recurrent sexual interest in prepubescent children, which is characterized by persistent thoughts, fantasies, urges, sexual arousal, or behavior. Besides a deviant sexual preference, sexual preoccupation was found to be a dynamic risk factor for reoffending. Thus, it is conceivable that sex offenders and especially sex offenders against children have difficulties to <span class="hlt">control</span> their responses to sexual stimuli. In the current study pedophiles, forensic and non-forensic <span class="hlt">control</span> subjects had to solve a cognitive <span class="hlt">task</span>, while sexual distractors were presented simultaneously. This kind of <span class="hlt">task</span> also requires <span class="hlt">control</span> functions. Therefore, data were analyzed with respect to attentional <span class="hlt">control</span> while comparing eye movements toward sexual distractors and toward the cognitive <span class="hlt">task</span>. We were mainly interested in how early (fixation latency) and late (relative fixation time) attentional processes were allocated to both, the cognitive target stimuli and the sexual distractors. Pedophiles demonstrated significantly lower attentional <span class="hlt">control</span> in the sexual distractor <span class="hlt">task</span> than both <span class="hlt">control</span> groups (non-pedophiles). They showed a shorter fixation latency and longer fixation time for sexual distractors than non-pedophiles. Furthermore, pedophiles demonstrated a longer fixation latency and shorter fixation time for cognitive target stimuli. For classification analyses, an attentional <span class="hlt">control</span> index (ACI) was built, i.e., the difference between eye movements on cognitive target stimuli and sexual distractors. For the ACI of early attentional processes, i.e., fixation latency, a good classification between pedophiles and non-pedophiles was found. We assumed that the measured attentional <span class="hlt">control</span> represents inhibitory executive functions, specifically interference <span class="hlt">control</span>. Further studies should examine if low attentional <span class="hlt">control</span> in pedophiles is due to low motivation to solve the <span class="hlt">task</span> or rather to a lack of ability to <span class="hlt">control</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5133255','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5133255"><span>Impaired Attentional <span class="hlt">Control</span> in Pedophiles in a Sexual Distractor <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jordan, Kirsten; Fromberger, Peter; von Herder, Jakob; Steinkrauss, Henrike; Nemetschek, Rebekka; Witzel, Joachim; Müller, Jürgen L.</p> <p>2016-01-01</p> <p>Pedophilic disorder, a subtype of paraphilia, is defined as a recurrent sexual interest in prepubescent children, which is characterized by persistent thoughts, fantasies, urges, sexual arousal, or behavior. Besides a deviant sexual preference, sexual preoccupation was found to be a dynamic risk factor for reoffending. Thus, it is conceivable that sex offenders and especially sex offenders against children have difficulties to <span class="hlt">control</span> their responses to sexual stimuli. In the current study pedophiles, forensic and non-forensic <span class="hlt">control</span> subjects had to solve a cognitive <span class="hlt">task</span>, while sexual distractors were presented simultaneously. This kind of <span class="hlt">task</span> also requires <span class="hlt">control</span> functions. Therefore, data were analyzed with respect to attentional <span class="hlt">control</span> while comparing eye movements toward sexual distractors and toward the cognitive <span class="hlt">task</span>. We were mainly interested in how early (fixation latency) and late (relative fixation time) attentional processes were allocated to both, the cognitive target stimuli and the sexual distractors. Pedophiles demonstrated significantly lower attentional <span class="hlt">control</span> in the sexual distractor <span class="hlt">task</span> than both <span class="hlt">control</span> groups (non-pedophiles). They showed a shorter fixation latency and longer fixation time for sexual distractors than non-pedophiles. Furthermore, pedophiles demonstrated a longer fixation latency and shorter fixation time for cognitive target stimuli. For classification analyses, an attentional <span class="hlt">control</span> index (ACI) was built, i.e., the difference between eye movements on cognitive target stimuli and sexual distractors. For the ACI of early attentional processes, i.e., fixation latency, a good classification between pedophiles and non-pedophiles was found. We assumed that the measured attentional <span class="hlt">control</span> represents inhibitory executive functions, specifically interference <span class="hlt">control</span>. Further studies should examine if low attentional <span class="hlt">control</span> in pedophiles is due to low motivation to solve the <span class="hlt">task</span> or rather to a lack of ability to <span class="hlt">control</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.springerlink.com/content/ac1umg53aeuuvpex/?p=b884f8df16e44d2a8d413d890a010374&pi=12','USGSPUBS'); return false;" href="http://www.springerlink.com/content/ac1umg53aeuuvpex/?p=b884f8df16e44d2a8d413d890a010374&pi=12"><span>Embryotoxic thresholds of <span class="hlt">mercury</span>: estimates from individual mallard eggs</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, G.H.; Hoffman, D.J.</p> <p>2003-01-01</p> <p>Eighty pairs of mallards (Anas platyrhynchos) were fed an uncontaminated diet until each female had laid 15 eggs. After each female had laid her 15th egg, the pair was randomly assigned to a <span class="hlt">control</span> diet or diets containing 5, 10, or 20 ?g/g <span class="hlt">mercury</span> as methylmercury until she had laid a second set of 15 eggs. There were 20 pairs in each group. After the second set of 15 eggs, the pair was returned to an uncontaminated diet, and the female was permitted to lay another 30 eggs. For those pairs fed the <span class="hlt">mercury</span> diets, the even-numbered eggs were incubated and the odd-numbered eggs were saved for possible <span class="hlt">mercury</span> analysis. <span class="hlt">Mercury</span> in the even-numbered eggs was estimated as the average of what was in the neighboring odd-numbered eggs. Neurological signs of methylmercury poisoning were observed in ducklings that hatched from eggs containing as little as 2.3 ?g/g estimated <span class="hlt">mercury</span> on a wet-weight basis, and deformities were seen in embryos from eggs containing about 1 ?g/g estimated <span class="hlt">mercury</span>. Although embryo mortality was seen in eggs estimated to contain as little as 0.74 ?g/g <span class="hlt">mercury</span>, there were considerable differences in the sensitivity of mallard embryos, especially from different parents, with some embryos surviving as much as 30 or more ?g/g <span class="hlt">mercury</span> in the egg.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19880048226&hterms=master+controller&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmaster%2Bcontroller','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19880048226&hterms=master+controller&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dmaster%2Bcontroller"><span>Telerobotic <span class="hlt">control</span> of a dextrous manipulator using master and six-DOF hand-<span class="hlt">controllers</span> for space assembly and servicing <span class="hlt">tasks</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>O'Hara, John M.</p> <p>1987-01-01</p> <p>Two studies were conducted evaluating methods of <span class="hlt">controlling</span> a telerobot; bilateral force reflecting master <span class="hlt">controllers</span> and proportional rate six degrees of freedom (DOF) hand <span class="hlt">controllers</span>. The first study compared the <span class="hlt">controllers</span> on performance of single manipulator arm <span class="hlt">tasks</span>, a peg-in-the-hole <span class="hlt">task</span>, and simulated satellite orbital replacement unit changeout. The second study, a Space Station truss assembly <span class="hlt">task</span>, required simultaneous operation of both manipulator arms (all 12 DOFs) and complex multiaxis slave arm movements. <span class="hlt">Task</span> times were significantly longer and fewer errors were committed with the hand <span class="hlt">controllers</span>. The hand <span class="hlt">controllers</span> were also rated significantly higher in cognitive and manual <span class="hlt">control</span> workload on the two-arm <span class="hlt">task</span>. The master <span class="hlt">controllers</span> were rated significantly higher in physical workload. There were no significant differences in ratings of manipulator <span class="hlt">control</span> quality.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19728491','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19728491"><span>Investigation of a <span class="hlt">mercury</span> speciation technique for flue gas desulfurization materials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Joo-Youp; Cho, Kyungmin; Cheng, Lei; Keener, Tim C; Jegadeesan, Gautham; Al-Abed, Souhail R</p> <p>2009-08-01</p> <p>Most of the synthetic gypsum generated from wet flue gas desulfurization (FGD) scrubbers is currently being used for wallboard production. Because oxidized <span class="hlt">mercury</span> is readily captured by the wet FGD scrubber, and coal-fired power plants equipped with wet scrubbers desire to benefit from the partial <span class="hlt">mercury</span> <span class="hlt">control</span> that these systems provide, some <span class="hlt">mercury</span> is likely to be bound in with the FGD gypsum and wallboard. In this study, the feasibility of identifying <span class="hlt">mercury</span> species in the FGD gypsum and wallboard samples was investigated using a large sample size thermal desorption method. Potential candidates of pure <span class="hlt">mercury</span> standards including mercuric chloride (HgCl2), mercurous chloride (Hg2Cl2), <span class="hlt">mercury</span> oxide (HgO), <span class="hlt">mercury</span> sulfide (HgS), and mercuric sulfate (HgSO4) were analyzed to compare their results with those obtained from FGD gypsum and dry wallboard samples. Although any of the thermal evolutionary curves obtained from these pure <span class="hlt">mercury</span> standards did not exactly match with those of the FGD gypsum and wallboard samples, it was identified that Hg2Cl2 and HgCl2 could be candidates. An additional chlorine analysis from the gypsum and wallboard samples indicated that the chlorine concentrations were approximately 2 orders of magnitude higher than the <span class="hlt">mercury</span> concentrations, suggesting possible chlorine association with <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/988092','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/988092"><span>JV <span class="hlt">Task</span> 107- Pilot-Scale Emission <span class="hlt">Control</span> Technology Testing for Constellation Energy</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Michael Jones; Brandon Pavlish; Stephen Sollom</p> <p>2007-06-30</p> <p>An Indonesian, Colombian, and Russian coal were tested in the Energy & Environmental Research Center's combustion test facility for their performance and an evaluation of <span class="hlt">mercury</span> release and capture with selected additives in both electrostatic precipitator and baghouse configurations. Sorbents included the carbon-based materials NORIT DARCO Hg, Sorbent Technologies B-PAC and B-PAC LC, STI Rejects provided by Constellation Energy, and Envergex e-Sorb, along with ChemMod's high-temperature additive. Each coal was evaluated over several days and compared. Ash-fouling tests were conducted, and <span class="hlt">mercury</span> levels were monitored using continuous <span class="hlt">mercury</span> monitors (CMMs). The Ontario Hydro <span class="hlt">mercury</span> sampling method was also utilized. Themore » Indonesian coal had the lowest ash content, lowest sulfur content, and lowest energy content of the three coals tested. The Colombian coal had the highest <span class="hlt">mercury</span> content and did contain a significant level of selenium which can interfere with the ability of a CMM to monitor <span class="hlt">mercury</span> in the gas stream. All sorbents displayed very favorable results. In most cases, <span class="hlt">mercury</span> removal greater than 86% could be obtained. The Indonesian coal displayed the best <span class="hlt">mercury</span> removal with sorbent addition. A maximum removal of 97% was measured with this coal using Envergex's carbon-based sorbent at a rate of 4 lb/Macf across an electrostatic precipitator. The high ash and selenium content of the Colombian coal caused it to be a problematic fuel, and ash plugging of the test furnace was a real concern. Problems with the baghouse module led to limited testing. Results indicated that native capture across the baghouse for each coal type was significant enough not to warrant sorbent addition necessary. The fouling potential was the lowest for the Indonesian coal. Low sulfur content contributes to the poor potential for fouling, as witnessed by the lack of deposits during testing. The Russian and Colombian coals had a much higher potential for fouling</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010ACP....10.1183W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010ACP....10.1183W"><span><span class="hlt">Mercury</span> emission and speciation of coal-fired power plants in China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, S. X.; Zhang, L.; Li, G. H.; Wu, Y.; Hao, J. M.; Pirrone, N.; Sprovieri, F.; Ancora, M. P.</p> <p>2010-02-01</p> <p>Comprehensive field measurements are needed to understand the <span class="hlt">mercury</span> emissions from Chinese power plants and to improve the accuracy of emission inventories. Characterization of <span class="hlt">mercury</span> emissions and their behavior were measured in six typical coal-fired power plants in China. During the tests, the flue gas was sampled simultaneously at inlet and outlet of Selective Catalytic Reduction (SCR), electrostatic precipitators (ESP), and flue gas desulfurization (FGD) using the Ontario Hydro Method (OHM). The pulverized coal, bottom ash, fly ash and gypsum were also sampled in the field. <span class="hlt">Mercury</span> concentrations in coal burned in the measured power plants ranged from 17 to 385 μg/kg. The <span class="hlt">mercury</span> mass balances for the six power plants varied from 87 to 116% of the input coal <span class="hlt">mercury</span> for the whole system. The total <span class="hlt">mercury</span> concentrations in the flue gas from boilers were at the range of 1.92-27.15 μg/m3, which were significantly related to the <span class="hlt">mercury</span> contents in burned coal. The <span class="hlt">mercury</span> speciation in flue gas right after the boiler is influenced by the contents of halogen, <span class="hlt">mercury</span>, and ash in the burned coal. The average <span class="hlt">mercury</span> removal efficiencies of ESP, ESP plus wet FGD, and ESP plus dry FGD-FF systems were 24%, 73% and 66%, respectively, which were similar to the average removal efficiencies of pollution <span class="hlt">control</span> device systems in other countries such as US, Japan and South Korea. The SCR system oxidized 16% elemental <span class="hlt">mercury</span> and reduced about 32% of total <span class="hlt">mercury</span>. Elemental <span class="hlt">mercury</span>, accounting for 66-94% of total <span class="hlt">mercury</span>, was the dominant species emitted to the atmosphere. The <span class="hlt">mercury</span> emission factor was also calculated for each power plant.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009ACPD....924051W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009ACPD....924051W"><span><span class="hlt">Mercury</span> emission and speciation of coal-fired power plants in China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, S.; Zhang, L.; Li, G.; Wu, Y.; Hao, J.; Pirrone, N.; Sprovieri, F.; Ancora, M. P.</p> <p>2009-11-01</p> <p>Comprehensive field measurements are needed to understand the <span class="hlt">mercury</span> emissions from Chinese power plants and to improve the accuracy of emission inventories. Characterization of <span class="hlt">mercury</span> emissions and their behavior were measured in six typical coal-fired power plants in China. During the tests, the flue gas was sampled simultaneously at inlet and outlet of selective catalyst reduction (SCR), electrostatic precipitators (ESP), and flue gas desulfurization (FGD) using the Ontario Hydro Method (OHM). The pulverized coal, bottom ash, fly ash and gypsum were also sampled in the field. <span class="hlt">Mercury</span> concentrations in coal burned in the measured power plants ranged from 17 to 385 μg/kg. The <span class="hlt">mercury</span> mass balances for the six power plants varied from 87 to 116% of the input coal <span class="hlt">mercury</span> for the whole system. The total <span class="hlt">mercury</span> concentrations in the flue gas from boilers were at the range of 1.92-27.15 μg/m3, which were significantly related to the <span class="hlt">mercury</span> contents in burned coal. The <span class="hlt">mercury</span> speciation in flue gas right after the boiler is influenced by the contents of halogen, <span class="hlt">mercury</span>, and ash in the burned coal. The average <span class="hlt">mercury</span> removal efficiencies of ESP, ESP plus wet FGD, and ESP plus dry FGD-FF systems were 24%, 73% and 66%, respectively, which were similar to the average removal efficiencies of pollution <span class="hlt">control</span> device systems in other countries such as US, Japan and South Korea. The SCR system oxidized 16% elemental <span class="hlt">mercury</span> and reduced about 32% of total <span class="hlt">mercury</span>. Elemental <span class="hlt">mercury</span>, accounting for 66-94% of total <span class="hlt">mercury</span>, was the dominant species emitted to the atmosphere. The <span class="hlt">mercury</span> emission factor was also calculated for each power plant.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26378869','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26378869"><span>Bioremediation potential of a highly <span class="hlt">mercury</span> resistant bacterial strain Sphingobium SA2 isolated from contaminated soil.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mahbub, Khandaker Rayhan; Krishnan, Kannan; Megharaj, Mallavarapu; Naidu, Ravi</p> <p>2016-02-01</p> <p>A <span class="hlt">mercury</span> resistant bacterial strain, SA2, was isolated from soil contaminated with <span class="hlt">mercury</span>. The 16S rRNA gene sequence of this isolate showed 99% sequence similarity to the genera Sphingobium and Sphingomonas of α-proteobacteria group. However, the isolate formed a distinct phyletic line with the genus Sphingobium suggesting the strain belongs to Sphingobium sp. Toxicity studies indicated resistance to high levels of <span class="hlt">mercury</span> with estimated EC50 values <span class="hlt">4.5</span> mg L(-1) and 44.15 mg L(-1) and MIC values 5.1 mg L(-1) and 48.48 mg L(-1) in minimal and rich media, respectively. The strain SA2 was able to volatilize <span class="hlt">mercury</span> by producing mercuric reductase enzyme which makes it potential candidate for remediating <span class="hlt">mercury</span>. ICP-QQQ-MS analysis of Hg supplemented culture solutions confirmed that almost 79% <span class="hlt">mercury</span> in the culture suspension was volatilized in 6 h. A very small amount of <span class="hlt">mercury</span> was observed to accumulate in cell pellets which was also evident according to ESEM-EDX analysis. The mercuric reductase gene merA was amplified and sequenced. The deduced amino acid sequence demonstrated sequence homology with α-proteobacteria and Ascomycota group. Copyright © 2015 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=157588&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=157588&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>NOVEL OXIDANT FOR ELEMENTAL <span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span> FROM FLUE GAS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>A novel economical oxidant has been developed for elemental <span class="hlt">mercury</span> (Hg(0)) removal from coal-fired boilers. The oxidant was rigorously tested in a lab-scale fixed-bed system with the Norit America's FGD activated carbon (DOE's benchmark sorbent) in a typical PRB subbituminous/l...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=157787&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=157787&keyword=coal+AND+activated&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>NOVEL OXIDANT FOR ELEMENTAL <span class="hlt">MERCURY</span> <span class="hlt">CONTROL</span> FROM FLUE GAS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The primary objective of this study is to develop and test advanced noncarbonaceous solid sorbent materials suitable for removing the elemental form of <span class="hlt">mercury</span> from power plant emissions. An efficient and cost-effective novel Hg(0) oxidant was evaluated in a lab-scale fixed-bed ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28110211','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28110211"><span>Methyl <span class="hlt">mercury</span>, but not inorganic <span class="hlt">mercury</span>, associated with higher blood pressure during pregnancy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wells, Ellen M; Herbstman, Julie B; Lin, Yu Hong; Hibbeln, Joseph R; Halden, Rolf U; Witter, Frank R; Goldman, Lynn R</p> <p>2017-04-01</p> <p>Prior studies addressing associations between <span class="hlt">mercury</span> and blood pressure have produced inconsistent findings; some of this may result from measuring total instead of speciated <span class="hlt">mercury</span>. This cross-sectional study of 263 pregnant women assessed total <span class="hlt">mercury</span>, speciated <span class="hlt">mercury</span>, selenium, and n-3 polyunsaturated fatty acids in umbilical cord blood and blood pressure during labor and delivery. Models with a) total <span class="hlt">mercury</span> or b) methyl and inorganic <span class="hlt">mercury</span> were evaluated. Regression models adjusted for maternal age, race/ethnicity, prepregnancy body mass index, neighborhood income, parity, smoking, n-3 fatty acids and selenium. Geometric mean total, methyl, and inorganic <span class="hlt">mercury</span> concentrations were 1.40µg/L (95% confidence interval: 1.29, 1.52); 0.95µg/L (0.84, 1.07); and 0.13µg/L (0.10, 0.17), respectively. Elevated systolic BP, diastolic BP, and pulse pressure were found, respectively, in 11.4%, 6.8%, and 19.8% of mothers. In adjusted multivariable models, a one-tertile increase of methyl <span class="hlt">mercury</span> was associated with 2.83mmHg (0.17, 5.50) higher systolic blood pressure and 2.99mmHg (0.91, 5.08) higher pulse pressure. In the same models, an increase of one tertile of inorganic <span class="hlt">mercury</span> was associated with -1.18mmHg (-3.72, 1.35) lower systolic blood pressure and -2.51mmHg (-4.49, -0.53) lower pulse pressure. No associations were observed with diastolic pressure. There was a non-significant trend of higher total <span class="hlt">mercury</span> with higher systolic blood pressure. We observed a significant association of higher methyl <span class="hlt">mercury</span> with higher systolic and pulse pressure, yet higher inorganic <span class="hlt">mercury</span> was significantly associated with lower pulse pressure. These results should be confirmed with larger, longitudinal studies. Copyright © 2017 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/fs/2012/3122/pdf/FS2012-3122_Web.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/fs/2012/3122/pdf/FS2012-3122_Web.pdf"><span><span class="hlt">Mercury</span> and halogens in coal--Their role in determining <span class="hlt">mercury</span> emissions from coal combustion</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Kolker, Allan; Quick, Jeffrey C.; Senior, Connie L.; Belkin, Harvey E.</p> <p>2012-01-01</p> <p><span class="hlt">Mercury</span> is a toxic pollutant. In its elemental form, gaseous <span class="hlt">mercury</span> has a long residence time in the atmosphere, up to a year, allowing it to be transported long distances from emission sources. <span class="hlt">Mercury</span> can be emitted from natural sources such as volcanoes, or from anthropogenic sources, such as coal-fired powerplants. In addition, all sources of <span class="hlt">mercury</span> on the Earth's surface can re-emit it from land and sea back to the atmosphere, from which it is then redeposited. <span class="hlt">Mercury</span> in the atmosphere is present in such low concentrations that it is not considered harmful. Once <span class="hlt">mercury</span> enters the aquatic environment, however, it can undergo a series of biochemical transformations that convert a portion of the <span class="hlt">mercury</span> originally present to methylmercury, a highly toxic organic form of <span class="hlt">mercury</span> that accumulates in fish and birds. Many factors contribute to creation of methylmercury in aquatic ecosystems, including <span class="hlt">mercury</span> availability, sediment and nutrient load, bacterial influence, and chemical conditions. In the United States, consumption of fish with high levels of methylmercury is the most common pathway for human exposure to <span class="hlt">mercury</span>, leading the U.S. Environmental Protection Agency (EPA) to issue fish consumption advisories in every State. The EPA estimates that 50 percent of the <span class="hlt">mercury</span> entering the atmosphere in the United States is emitted from coal-burning utility powerplants. An EPA rule, known as MATS (for <span class="hlt">Mercury</span> and Air Toxics Standards), to reduce emissions of <span class="hlt">mercury</span> and other toxic pollutants from powerplants, was signed in December 2011. The rule, which is currently under review, specifies limits for <span class="hlt">mercury</span> and other toxic elements, such as arsenic, chromium, and nickel. MATS also places limits on emission of harmful acid gases, such as hydrochloric acid and hydrofluoric acid. These standards are the result of a 2010 detailed nationwide program by the EPA to sample stack emissions and thousands of shipments of coal to coal-burning powerplants. The United</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29262749','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29262749"><span>Can Dual <span class="hlt">Task</span> Walking Improve in Parkinson's Disease After External Focus of Attention Exercise? A Single Blind Randomized <span class="hlt">Controlled</span> Trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Beck, Eric N; Intzandt, Brittany N; Almeida, Quincy J</p> <p>2018-01-01</p> <p>It may be possible to use attention-based exercise to decrease demands associated with walking in Parkinson's disease (PD), and thus improve dual <span class="hlt">task</span> walking ability. For example, an external focus of attention (focusing on the effect of an action on the environment) may recruit automatic <span class="hlt">control</span> processes degenerated in PD, whereas an internal focus (limb movement) may recruit conscious (nonautomatic) <span class="hlt">control</span> processes. Thus, we aimed to investigate how externally and internally focused exercise influences dual <span class="hlt">task</span> walking and symptom severity in PD. Forty-seven participants with PD were randomized to either an Externally (n = 24) or Internally (n = 23) focused group and completed 33 one-hour attention-based exercise sessions over 11 weeks. In addition, 16 participants were part of a <span class="hlt">control</span> group. Before, after, and 8 weeks following the program (pre/post/washout), gait patterns were measured during single and dual <span class="hlt">task</span> walking (digit-monitoring <span class="hlt">task</span>, ie, walking while counting numbers announced by an audio-track), and symptom severity (UPDRS-III) was assessed ON and OFF dopamine replacement. Pairwise comparisons (95% confidence intervals [CIs]) and repeated-measures analyses of variance were conducted. Pre to post: Dual <span class="hlt">task</span> step time decreased in the external group (Δ = 0.02 seconds, CI 0.01-0.04). Dual <span class="hlt">task</span> step length (Δ = 2.3 cm, CI 0.86-3.75) and velocity (Δ = <span class="hlt">4.5</span> cm/s, CI 0.59-8.48) decreased (became worse) in the internal group. UPDRS-III scores (ON and OFF) decreased (improved) in only the External group. Pre to washout: Dual <span class="hlt">task</span> step time ( P = .005) and percentage in double support ( P = .014) significantly decreased (improved) in both exercise groups, although only the internal group increased error on the secondary counting <span class="hlt">task</span> (ie, more errors monitoring numbers). UPDRS-III scores in both exercise groups significantly decreased ( P = .001). Since dual <span class="hlt">task</span> walking improvements were found immediately, and 8 weeks after the cessation of an</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1255647','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1255647"><span>Formation of soluble <span class="hlt">mercury</span> oxide coatings: Transformation of elemental <span class="hlt">mercury</span> in soils</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Miller, Carrie L.; Watson, David B.; Lester, Brian P.</p> <p>2015-09-21</p> <p>In this study, the impact of <span class="hlt">mercury</span> (Hg) on human and ecological health has been known for decades. Although a treaty signed in 2013 by 147 nations regulates future large-scale <span class="hlt">mercury</span> emissions, legacy Hg contamination exists worldwide and small-scale releases will continue. The fate of elemental <span class="hlt">mercury</span>, Hg(0), lost to the subsurface and its potential chemical transformation that can lead to changes in speciation and mobility are poorly understood. Here, we show that Hg(0) beads interact with soil or manganese oxide solids and X-ray spectroscopic analysis indicates that the soluble <span class="hlt">mercury</span> coatings are HgO. Dissolution studies show that, after reactingmore » with a composite soil, >20 times more Hg is released into water from the coated beads than from a pure liquid <span class="hlt">mercury</span> bead. An even larger, >700 times, release occurs from coated Hg(0) beads that have been reacted with manganese oxide, suggesting that manganese oxides are involved in the transformation of the Hg(0) beads and creation of the soluble <span class="hlt">mercury</span> coatings. Although the coatings may inhibit Hg(0) evaporation, the high solubility of the coatings can enhance Hg(II) migration away from the Hg(0)-spill site and result in potential changes in <span class="hlt">mercury</span> speciation in the soil and increased <span class="hlt">mercury</span> mobility.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-GRC-1960-C-53287.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-GRC-1960-C-53287.html"><span>Project <span class="hlt">Mercury</span> Escape Tower Rockets Tests</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1960-04-21</p> <p>A <span class="hlt">Mercury</span> capsule is mounted inside the Altitude Wind Tunnel for a test of its escape tower rockets at the National Aeronautics and Space Administration (NASA) Lewis Research Center. In October 1959 NASA’s Space <span class="hlt">Task</span> Group allocated several Project <span class="hlt">Mercury</span> assignments to Lewis. The Altitude Wind Tunnel was quickly modified so that its 51-foot diameter western leg could be used as a test chamber. The final round of tests in the Altitude Wind Tunnel sought to determine if the smoke plume from the capsule’s escape tower rockets would shroud or compromise the spacecraft. The escape tower, a 10-foot steel rig with three small rockets, was attached to the nose of the <span class="hlt">Mercury</span> capsule. It could be used to jettison the astronaut and capsule to safety in the event of a launch vehicle malfunction on the pad or at any point prior to separation from the booster. Once actuated, the escape rockets would fire, and the capsule would be ejected away from the booster. After the capsule reached its apex of about 2,500 feet, the tower, heatshield, retropackage, and antenna would be ejected and a drogue parachute would be released. Flight tests of the escape system were performed at Wallops Island as part of the series of Little Joe launches. Although the escape rockets fired prematurely on Little Joe’s first attempt in August 1959, the January 1960 follow-up was successful.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21625920','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21625920"><span><span class="hlt">Mercury</span> concentration in the muscle of seven fish species from Chagan Lake, Northeast China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhu, Lilu; Yan, Baixing; Wang, Lixia; Pan, Xiaofeng</p> <p>2012-03-01</p> <p>Chagan Lake is located downstream of the Second Songhua River basin in Northeast China. It is one of the top ten inland freshwater lakes, and an important aquatic farm in China. The lake has been receiving large amounts (currently at 1.5 × 10(8) m(3)/a) of water from the river since 1984. This would pose a threat to the aquatic system of the lake because the river was seriously polluted with <span class="hlt">mercury</span> in 1970s-1980s. The current study is the first to report the total <span class="hlt">mercury</span> concentrations in fish found in the lake. <span class="hlt">Mercury</span> concentrations in seven fish species collected from the lake in January 2009 were determined. The related human health risk from fish consumption was also assessed. The average concentration of <span class="hlt">mercury</span> in the fish was 18.8 μg/kg of wet weight, ranging from <span class="hlt">4.5</span> to 37.6 μg/kg of wet weight. A large difference in the <span class="hlt">mercury</span> concentrations among the fish species was found. The <span class="hlt">mercury</span> concentration was found to be higher in carnivorous species and lower in omnivorous and herbivorous species. This demonstrates greater <span class="hlt">mercury</span> bioaccumulation in fish species at higher trophic levels. <span class="hlt">Mercury</span> concentrations in fish showed significant positive correlations with age, length, and weight. No significant relationship was found between <span class="hlt">mercury</span> concentrations in fish and the habitat preferences. <span class="hlt">Mercury</span> concentrations in fish from the lake were within the limits of the international and national standards of China established for <span class="hlt">mercury</span>. According to the reference doses established by the United States Environmental Protection Agency, the maximum safe consuming quantity considering all the fish was 297.3 g/day/person, which was more than five times as much as the current quantity (50 g/day/person) consumed by the local residents. This investigation indicates that the historical pollution of the Second Songhua River has not caused <span class="hlt">mercury</span> bioaccumulation in fish muscle tissue of Chagan Lake. The present consumption of fish from the lake in the local area</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10734728','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10734728"><span>[Potential exposure to inorganic <span class="hlt">mercury</span> in people living near a sewage sludge dumping site: urinary excretion of <span class="hlt">mercury</span>, subjective symptoms and renal function].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Arisawa, K; Takahashi, T; Nakano, A; Liu, X J; Saito, H; Takizawa, Y; Koba, T</p> <p>2000-02-01</p> <p>The purpose of this study was to evaluate the presence of exposure to inorganic <span class="hlt">mercury</span> and its health effects among people living near a sewage sludge dumping site in Nagasaki Prefecture, Japan. In this area, sewage sludge and industrial waste have been dumped since 1975, and total <span class="hlt">mercury</span> levels exceeding the water quality standards (0.0006-0.0020 mg/l) have been detected in seeping water and river water since July 1997. The population for the present study comprised 48 subjects (aged 11-91 years) living near a sewage sludge dumping site and 49 subjects (aged 10-82 years) living in a non-polluted area. In November and December 1998, subjective symptoms of inorganic <span class="hlt">mercury</span> exposure, history of occupational exposure to inorganic <span class="hlt">mercury</span>, frequency of fish intake, sources of drinking water and other health habits were inquired by a self-administered questionnaire. Total <span class="hlt">mercury</span> and total protein levels and N-acetyl-beta-D-glucosaminidase (NAG) activity in morning urine specimens were also measured. Among males, the proportion of subjects who complained of tremor in the hands (P = 0.02) and increased irritability (P = 0.10) was higher in the polluted area than in the <span class="hlt">control</span> area. In addition, the proportion of those who did not report being easily fatigued was lower in the polluted area than in the <span class="hlt">control</span> area (P = 0.07). Among females there was no significant difference in the prevalence of self-reported symptoms related to the central nervous system disturbance between the two areas. After adjustment for gender and age using logistic regression analysis, the prevalence of increased irritability was significantly higher (P = 0.05) and the proportion of those who did not report being easily fatigued was significantly lower (P = 0.03) in the polluted area than in the <span class="hlt">control</span> area. However, there was no significant difference in the geometric mean of urinary total <span class="hlt">mercury</span> concentration (microgram/g creatinine) between the polluted area (0.66, 95% confidence interval</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=129902','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=129902"><span><span class="hlt">Mercury</span> Methylation by Desulfovibrio desulfuricans ND132 in the Presence of Polysulfides</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jay, Jenny Ayla; Murray, Karen J.; Gilmour, Cynthia C.; Mason, Robert P.; Morel, François M. M.; Roberts, A. Lynn; Hemond, Harold F.</p> <p>2002-01-01</p> <p>The extracellular speciation of <span class="hlt">mercury</span> may <span class="hlt">control</span> bacterial uptake and methylation. <span class="hlt">Mercury</span>-polysulfide complexes have recently been shown to be prevalent in sulfidic waters containing zero-valent sulfur. Despite substantial increases in total dissolved <span class="hlt">mercury</span> concentration, methylation rates in cultures of Desulfovibrio desulfuricans ND132 equilibrated with cinnabar did not increase in the presence of polysulfides, as expected due to the large size and charged nature of most of the complexes. In natural waters not at saturation with cinnabar, <span class="hlt">mercury</span>-polysulfide complexes would be expected to shift the speciation of <span class="hlt">mercury</span> from HgS0(aq) toward charged complexes, thereby decreasing methylation rates. PMID:12406773</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/493402','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/493402"><span>Investigation and demonstration of dry carbon-based sorbent injection for <span class="hlt">mercury</span> <span class="hlt">control</span>. Quarterly technical report, July 1, 1996--September 31, 1996</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Hunt, T.; Sjostrom, S.; Smith, J.</p> <p>1996-11-06</p> <p>The overall objective of this two phase program is to investigate the use of dry carbon-based sorbents for <span class="hlt">mercury</span> <span class="hlt">control</span>. This information is important to the utility industry in anticipation of pending regulations. During Phase I, a bench-scale field test device that can be configured as an electrostatic precipitator, a pulse-jet baghouse, or a reverse-gas baghouse has been designed, built and integrated with an existing pilot-scale facility at PSCo`s Comanche Station. Up to three candidate sorbents will be injected into the flue gas stream upstream of the test device to and <span class="hlt">mercury</span> concentration measurements will be made to determine themore » <span class="hlt">mercury</span> removal efficiency for each sorbent. During the Phase II effort, component integration for the most promising dry sorbent technology shall be tested at the 5000 acfm pilot-scale.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19890017143','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19890017143"><span><span class="hlt">Task</span> oriented nonlinear <span class="hlt">control</span> laws for telerobotic assembly operations</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Walker, R. A.; Ward, L. S.; Elia, C. F.</p> <p>1987-01-01</p> <p>The goal of this research is to achieve very intelligent telerobotic <span class="hlt">controllers</span> which are capable of receiving high-level commands from the human operator and implementing them in an adaptive manner in the object/<span class="hlt">task</span>/manipulator workspace. Initiatives by the authors at Integrated Systems, Inc. to identify and develop the key technologies necessary to create such a flexible, highly programmable, telerobotic <span class="hlt">controller</span> are presented. The focus of the discussion is on the modeling of insertion <span class="hlt">tasks</span> in three dimensions and nonlinear implicit force feedback <span class="hlt">control</span> laws which incorporate tool/workspace constraints. Preliminary experiments with dual arm beam assembly in 2-D are presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/circ/0496/report.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/circ/0496/report.pdf"><span><span class="hlt">Mercury</span> - Its occurrence and economic trends</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Bailey, Edgar H.; Smith, Roscoe M.</p> <p>1964-01-01</p> <p>price will be a predictable increase in production. If the price averages $300 a flask for 1 year or more, annual production may increase to a rate of 30,000-35,000 flasks in 1966 or 1967. If the price averages $400 a flask, production may increase to <span class="hlt">45</span>,000-50,000 flasks a year after a timelag of two or three years. New ore bodies would have to be found however, to attain these rates of production, and the mining of lower grade ores would be needed to sustain them for more than a few years. By 1966 the U.S. economy will require at least 67 000 flasks, and the domestic demand for <span class="hlt">mercury</span> thereafter will continue to increase. The probability that domestic mines will continue to supply a fourth or more of the domestic consumption is dependent upon the price of <span class="hlt">mercury</span> for the next few years. The outlook for the long-term supply is reassuring, but it is dependent, not only upon price, but upon continued progress in new techniques of discovery.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004cosp...35.3464B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004cosp...35.3464B"><span>To <span class="hlt">Mercury</span> dynamics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Barkin, Yu. V.; Ferrandiz, J. M.</p> <p></p> <p>Present significance of the study of rotation of <span class="hlt">Mercury</span> considered as a core-mantle system arises from planned <span class="hlt">Mercury</span> missions. New high accurate data on <span class="hlt">Mercury</span>'s structure and its physical fields are expected from BepiColombo mission (Anselmi et al., 2001). Investigation of resonant rotation of <span class="hlt">Mercury</span>, begun by Colombo G. (1966), will play here main part. New approaches to the study of <span class="hlt">Mercury</span> dynamics and the construction of analytical theory of its resonant rotation are suggested. Within these approaches <span class="hlt">Mercury</span> is considered as a system of two non-spherical interacting bodies: a core and a mantle. The mantle of <span class="hlt">Mercury</span> is considered as non-spherical, rigid (or elastic) layer. Inner shell is a liquid core, which occupies a large ellipsoidal cavity of <span class="hlt">Mercury</span>. This <span class="hlt">Mercury</span> system moves in the gravitational field of the Sun in resonant traslatory-rotary regime of the resonance 3:2. We take into account only the second harmonic of the force function of the Sun and <span class="hlt">Mercury</span>. For the study of <span class="hlt">Mercury</span> rotation we have been used specially designed canonical equations of motion in Andoyer and Poincare variables (Barkin, Ferrandiz, 2001), more convenient for the application of mentioned methods. Approximate observational and some theoretical evaluations of the two main coefficients of <span class="hlt">Mercury</span> gravitational field J_2 and C22 are known. From observational data of Mariner-10 mission were obtained some first evaluations of these coefficients: J_2 =(8± 6)\\cdot 10-5(Esposito et al., 1977); J_2 =(6± 2)\\cdot 10-5and C22 =(1.0± 0.5)\\cdot 10-5(Anderson et al., 1987). Some theoretical evaluation of ratio of these coefficients has been obtained on the base of study of periodic motions of the system of two non-spherical gravitating bodies (Barkin, 1976). Corresponding values of coefficients consist: J_2 =8\\cdot 10-5and C22 =0.33\\cdot 10-5. We have no data about non-sphericity of inner core of <span class="hlt">Mercury</span>. Planned missions to <span class="hlt">Mercury</span> (BepiColombo and Messenger) promise to</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1107445','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1107445"><span>Multifamily Quality <span class="hlt">Control</span> Inspector Job/<span class="hlt">Task</span> Analysis and Report: September 2013</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Owens, C. M.</p> <p></p> <p>The development of job/<span class="hlt">task</span> analyses (JTAs) is one of three components of the Guidelines for Home Energy Professionals project and will allow industry to develop training resources, quality assurance protocols, accredited training programs, and professional certifications. The Multifamily Quality <span class="hlt">Control</span> Inspector JTA identifies and catalogs all of the <span class="hlt">tasks</span> performed by multifamily quality <span class="hlt">control</span> inspectors, as well as the knowledge, skills, and abilities (KSAs) needed to perform the identified <span class="hlt">tasks</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20010110220','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20010110220"><span>Psychophysiological <span class="hlt">Control</span> of Acognitive <span class="hlt">Task</span> Using Adaptive Automation</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Freeman, Frederick; Pope, Alan T. (Technical Monitor)</p> <p>2001-01-01</p> <p>The major focus of the present proposal was to examine psychophysiological variables related to hazardous states of awareness induced by monitoring automated systems. With the increased use of automation in today's work environment, people's roles in the work place are being redefined from that of active participant to one of passive monitor. Although the introduction of automated systems has a number of benefits, there are also a number of disadvantages regarding worker performance. Byrne and Parasuraman have argued for the use of psychophysiological measures in the development and the implementation of adaptive automation. While both performance based and model based adaptive automation have been studied, the use of psychophysiological measures, especially EEG, offers the advantage of real time evaluation of the state of the subject. The current study used the closed-loop system, developed at NASA-Langley Research Center, to <span class="hlt">control</span> the state of awareness of subjects while they performed a cognitive vigilance <span class="hlt">task</span>. Previous research in our laboratory, supported by NASA, has demonstrated that, in an adaptive automation, closed-loop environment, subjects perform a tracking <span class="hlt">task</span> better under a negative than a positive, feedback condition. In addition, this condition produces less subjective workload and larger P300 event related potentials to auditory stimuli presented in a concurrent oddball <span class="hlt">task</span>. We have also recently shown that the closed-loop system used to <span class="hlt">control</span> the level of automation in a tracking <span class="hlt">task</span> can also be used to <span class="hlt">control</span> the event rate of stimuli in a vigilance monitoring <span class="hlt">task</span>. By changing the event rate based on the subject's index of arousal, we have been able to produce improved monitoring, relative to various <span class="hlt">control</span> groups. We have demonstrated in our initial closed-loop experiments with the the vigilance paradigm that using a negative feedback contingency (i.e. increasing event rates when the EEG index is low and decreasing event rates when</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27908487','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27908487"><span><span class="hlt">Mercury</span> exposure and source tracking in distinct marine-caged fish farm in southern China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Xu, Xiaoyu; Wang, Wen-Xiong</p> <p>2017-01-01</p> <p>Coasts of South China have experienced an unprecedented growth in its marine-caged fish industry. We analyzed <span class="hlt">mercury</span> concentrations and stable <span class="hlt">mercury</span> isotope ratios in fourteen fish species from two cage-cultured farms in Southern China. Total <span class="hlt">mercury</span> concentrations of all species were lower than the human health screening values, but the human exposures through consumption of several carnivorous fish exceeded the USEPA's reference dose. Isotopic compositions in the sediment (δ 202 Hg: -1.<span class="hlt">45</span>‰ to -1.23‰; Δ 199 Hg: -0.04‰ to -0.01‰) suggested that <span class="hlt">mercury</span> in these farms were from coal combustion and industrial inputs. Commercial food pellets and fresh fish viscera provided the major sources of methylmercury to the farmed fish and dominated their <span class="hlt">mercury</span> isotopic signatures. Non-carnivorous fish presented lower δ 202 Hg and Δ 199 Hg values than the carnivorous fish. Using a mixing model, we demonstrated that the majority of <span class="hlt">mercury</span> in non-carnivorous species came from pellets and in carnivorous fish came from combined diets of pellets and viscera. Meanwhile, methylmercury concentrations and % methylmercury in the fish were positively correlated with δ 202 Hg values but not with Δ 199 Hg values, mainly because fish eating similar feeds maintained similar Δ 199 Hg values. Environmental influences of cage farming such as fish feces and uneaten viscera that continuously provide organic <span class="hlt">mercury</span> to the environments need to be considered. Copyright © 2016 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1904171','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1904171"><span>Distinct brain networks for adaptive and stable <span class="hlt">task</span> <span class="hlt">control</span> in humans</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dosenbach, Nico U. F.; Fair, Damien A.; Miezin, Francis M.; Cohen, Alexander L.; Wenger, Kristin K.; Dosenbach, Ronny A. T.; Fox, Michael D.; Snyder, Abraham Z.; Vincent, Justin L.; Raichle, Marcus E.; Schlaggar, Bradley L.; Petersen, Steven E.</p> <p>2007-01-01</p> <p><span class="hlt">Control</span> regions in the brain are thought to provide signals that configure the brain's moment-to-moment information processing. Previously, we identified regions that carried signals related to <span class="hlt">task-control</span> initiation, maintenance, and adjustment. Here we characterize the interactions of these regions by applying graph theory to resting state functional connectivity MRI data. In contrast to previous, more unitary models of <span class="hlt">control</span>, this approach suggests the presence of two distinct <span class="hlt">task-control</span> networks. A frontoparietal network included the dorsolateral prefrontal cortex and intraparietal sulcus. This network emphasized start-cue and error-related activity and may initiate and adapt <span class="hlt">control</span> on a trial-by-trial basis. The second network included dorsal anterior cingulate/medial superior frontal cortex, anterior insula/frontal operculum, and anterior prefrontal cortex. Among other signals, these regions showed activity sustained across the entire <span class="hlt">task</span> epoch, suggesting that this network may <span class="hlt">control</span> goal-directed behavior through the stable maintenance of <span class="hlt">task</span> sets. These two independent networks appear to operate on different time scales and affect downstream processing via dissociable mechanisms. PMID:17576922</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11642409','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11642409"><span>Differential <span class="hlt">mercury</span> volatilization by tobacco organs expressing a modified bacterial merA gene.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>He, Y K; Sun, J G; Feng, X Z; Czakó, M; Márton, L</p> <p>2001-09-01</p> <p><span class="hlt">Mercury</span> pollution is a major environmental problem accompanying industrial activities. Most of the <span class="hlt">mercury</span> released ends up and retained in the soil as complexes of the toxic ionic <span class="hlt">mercury</span> (Hg2+), which then can be converted by microbes into the even more toxic methylmercury which tends to bioaccumulate. <span class="hlt">Mercury</span> detoxification of the soil can also occur by microbes converting the ionic <span class="hlt">mercury</span> into the least toxic metallic <span class="hlt">mercury</span> (Hg0) form, which then evaporates. The remediation potential of transgenic plants carrying the MerA gene from E. coli encoding mercuric ion reductase could be evaluated. A modified version of the gene, optimized for plant codon preferences (merApe9, Rugh et al. 1996), was introduced into tobacco by Agrobacterium-mediated leaf disk transformation. Transgenic seeds were resistant to HgCl2 at 50 microM, and some of them (10-20% ) could germinate on media containing as much as 350 microM HgCl2, while the <span class="hlt">control</span> plants were fully inhibited or died on 50 microM HgCl2. The rate of elemental <span class="hlt">mercury</span> evolution from Hg2+ (added as HgCl2) was 5-8 times higher for transgenic plants than the <span class="hlt">control</span>. <span class="hlt">Mercury</span> volatilization by isolated organs standardized for fresh weight was higher (up to 5 times) in the roots than in shoots or the leaves. The data suggest that it is the root system of the transgenic plants that volatilizes most of the reduced <span class="hlt">mercury</span> (Hg0). It also suggests that much of the <span class="hlt">mercury</span> need not enter the vascular system to be transported to the leaves for volatilization. Transgenic plants with the merApe9 gene may be used to <span class="hlt">mercury</span> detoxification for environmental improvement in <span class="hlt">mercury</span>-contaminated regions more efficiently than it had been predicted based on data on volatilization of whole plants via the upper parts only (Rugh et al. 1996).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=91717','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=91717"><span>Removal of <span class="hlt">Mercury</span> from Chloralkali Electrolysis Wastewater by a <span class="hlt">Mercury</span>-Resistant Pseudomonas putida Strain</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>von Canstein, H.; Li, Y.; Timmis, K. N.; Deckwer, W.-D.; Wagner-Döbler, I.</p> <p>1999-01-01</p> <p>A <span class="hlt">mercury</span>-resistant bacterial strain which is able to reduce ionic <span class="hlt">mercury</span> to metallic <span class="hlt">mercury</span> was used to remediate in laboratory columns <span class="hlt">mercury</span>-containing wastewater produced during electrolytic production of chlorine. Factory effluents from several chloralkali plants in Europe were analyzed, and these effluents contained total <span class="hlt">mercury</span> concentrations between 1.6 and 7.6 mg/liter and high chloride concentrations (up to 25 g/liter) and had pH values which were either acidic (pH 2.4) or alkaline (pH 13.0). A <span class="hlt">mercury</span>-resistant bacterial strain, Pseudomonas putida Spi3, was isolated from polluted river sediments. Biofilms of P. putida Spi3 were grown on porous carrier material in laboratory column bioreactors. The bioreactors were continuously fed with sterile synthetic model wastewater or nonsterile, neutralized, aerated chloralkali wastewater. We found that sodium chloride concentrations up to 24 g/liter did not inhibit microbial <span class="hlt">mercury</span> retention and that <span class="hlt">mercury</span> concentrations up to 7 mg/liter could be treated with the bacterial biofilm with no loss of activity. When wastewater samples from three different chloralkali plants in Europe were used, levels of <span class="hlt">mercury</span> retention efficiency between 90 and 98% were obtained. Thus, microbial <span class="hlt">mercury</span> removal is a potential biological treatment for chloralkali electrolysis wastewater. PMID:10583977</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=task+AND+performance+AND+%22+questionnaire%22&pg=6&id=EJ744632','ERIC'); return false;" href="https://eric.ed.gov/?q=task+AND+performance+AND+%22+questionnaire%22&pg=6&id=EJ744632"><span>Aging and Concurrent <span class="hlt">Task</span> Performance: Cognitive Demand and Motor <span class="hlt">Control</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Albinet, Cedric; Tomporowski, Phillip D.; Beasman, Kathryn</p> <p>2006-01-01</p> <p>A motor <span class="hlt">task</span> that requires fine <span class="hlt">control</span> of upper limb movements and a cognitive <span class="hlt">task</span> that requires executive processing--first performing them separately and then concurrently--was performed by 18 young and 18 older adults. The motor <span class="hlt">task</span> required participants to tap alternatively on two targets, the sizes of which varied systematically. The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1327673-modeling-mercury-proteins','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1327673-modeling-mercury-proteins"><span>Modeling <span class="hlt">Mercury</span> in Proteins</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Smith, Jeremy C; Parks, Jerry M</p> <p>2016-01-01</p> <p><span class="hlt">Mercury</span> (Hg) is a naturally occurring element that is released into the biosphere both by natural processes and anthropogenic activities. Although its reduced, elemental form Hg(0) is relatively non-toxic, other forms such as Hg2+ and, in particular, its methylated form, methylmercury, are toxic, with deleterious effects on both ecosystems and humans. Microorganisms play important roles in the transformation of <span class="hlt">mercury</span> in the environment. Inorganic Hg2+ can be methylated by certain bacteria and archaea to form methylmercury. Conversely, bacteria also demethylate methylmercury and reduce Hg2+ to relatively inert Hg(0). Transformations and toxicity occur as a result of <span class="hlt">mercury</span> interacting with variousmore » proteins. Clearly, then, understanding the toxic effects of <span class="hlt">mercury</span> and its cycling in the environment requires characterization of these interactions. Computational approaches are ideally suited to studies of <span class="hlt">mercury</span> in proteins because they can provide a detailed picture and circumvent issues associated with toxicity. Here we describe computational methods for investigating and characterizing how <span class="hlt">mercury</span> binds to proteins, how inter- and intra-protein transfer of <span class="hlt">mercury</span> is orchestrated in biological systems, and how chemical reactions in proteins transform the metal. We describe quantum chemical analyses of aqueous Hg(II), which reveal critical factors that determine ligand binding propensities. We then provide a perspective on how we used chemical reasoning to discover how microorganisms methylate <span class="hlt">mercury</span>. We also highlight our combined computational and experimental studies of the proteins and enzymes of the mer operon, a suite of genes that confers <span class="hlt">mercury</span> resistance in many bacteria. Lastly, we place work on <span class="hlt">mercury</span> in proteins in the context of what is needed for a comprehensive multi-scale model of environmental <span class="hlt">mercury</span> cycling.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5036838','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5036838"><span>Blood <span class="hlt">Mercury</span> Levels of Zebra Finches Are Heritable: Implications for the Evolution of <span class="hlt">Mercury</span> Resistance</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Buck, Kenton A.; Varian-Ramos, Claire W.; Cristol, Daniel A.; Swaddle, John P.</p> <p>2016-01-01</p> <p><span class="hlt">Mercury</span> is a ubiquitous metal contaminant that negatively impacts reproduction of wildlife and has many other sub-lethal effects. Songbirds are sensitive bioindicators of <span class="hlt">mercury</span> toxicity and may suffer population declines as a result of <span class="hlt">mercury</span> pollution. Current predictions of <span class="hlt">mercury</span> accumulation and biomagnification often overlook possible genetic variation in <span class="hlt">mercury</span> uptake and elimination within species and the potential for evolution in affected populations. We conducted a study of dietary <span class="hlt">mercury</span> exposure in a model songbird species, maintaining a breeding population of zebra finches (Taeniopygia guttata) on standardized diets ranging from 0.0–2.4 μg/g methylmercury. We applied a quantitative genetics approach to examine patterns of variation and heritability of <span class="hlt">mercury</span> accumulation within dietary treatments using a method of mixed effects modeling known as the 'animal model'. Significant variation in blood <span class="hlt">mercury</span> accumulation existed within each treatment for birds exposed at the same dietary level; moreover, this variation was highly repeatable for individuals. We observed substantial genetic variation in blood <span class="hlt">mercury</span> accumulation for birds exposed at intermediate dietary concentrations. Taken together, this is evidence that genetic variation for factors affecting blood <span class="hlt">mercury</span> accumulation could be acted on by selection. If similar heritability for <span class="hlt">mercury</span> accumulation exists in wild populations, selection could result in genetic differentiation for populations in contaminated locations, with possible consequences for <span class="hlt">mercury</span> biomagnification in food webs. PMID:27668745</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2430136','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2430136"><span><span class="hlt">Mercury</span> Exposure in Young Children Living in New York City</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jeffery, Nancy; Kieszak, Stephanie; Fritz, Pat; Spliethoff, Henry; Palmer, Christopher D.; Parsons, Patrick J.; Kass, Daniel E.; Caldwell, Kathy; Eadon, George; Rubin, Carol</p> <p>2007-01-01</p> <p>Residential exposure to vapor from current or previous cultural use of <span class="hlt">mercury</span> could harm children living in rental (apartment) homes. That concern prompted the following agencies to conduct a study to assess pediatric <span class="hlt">mercury</span> exposure in New York City communities by measuring urine <span class="hlt">mercury</span> levels: New York City Department of Health and Mental Hygiene’s (NYCDOHMH) Bureau of Environmental Surveillance and Policy, New York State Department of Health/Center for Environmental Health (NYSDOHCEH), Wadsworth Center’s Biomonitoring Program/Trace Elements Laboratory (WC-TEL), and Centers for Disease <span class="hlt">Control</span> and Prevention (CDC). A previous study indicated that people could obtain <span class="hlt">mercury</span> for ritualistic use from botanicas located in Brooklyn, Manhattan, and the Bronx. Working closely with local community partners, we concentrated our recruiting efforts through health clinics located in potentially affected neighborhoods. We developed posters to advertise the study, conducted active outreach through local partners, and, as compensation for participation in the study, we offered a food gift certificate redeemable at a local grocer. We collected 460 urine specimens and analyzed them for total <span class="hlt">mercury</span>. Overall, geometric mean urine total <span class="hlt">mercury</span> was 0.31 μg <span class="hlt">mercury</span>/l urine. One sample was 24 μg <span class="hlt">mercury</span>/l urine, which exceeded the (20 μg <span class="hlt">mercury</span>/l urine) NYSDOH Heavy Metal Registry reporting threshold for urine <span class="hlt">mercury</span> exposure. Geometric mean urine <span class="hlt">mercury</span> levels were uniformly low and did not differ by neighborhood or with any clinical significance by children’s ethnicity. Few parents reported the presence of <span class="hlt">mercury</span> at home, in a charm, or other item (e.g., skin-lightening creams and soaps), and we found no association between these potential sources of exposure and a child’s urinary <span class="hlt">mercury</span> levels. All pediatric <span class="hlt">mercury</span> levels measured in this study were well below a level considered to be of medical concern. This study found neither self-reported nor measured</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18817946','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18817946"><span>Monitoring <span class="hlt">mercury</span> in two South African herbaria.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kataeva, Maria; Panichev, Nikolay; van Wyk, Abraham E</p> <p>2009-01-15</p> <p><span class="hlt">Mercury</span> [Hg] emissions from old plant collections treated with mercuric chloride (HgCl(2)) may present a high health risk for staff working in certain herbaria. The present study evaluated Hg concentrations in ambient air, plant specimens and biological samples from staff working in the Pretoria National Herbarium (PRE) and the H.G.W.J. Schweickerdt Herbarium (PRU), University of Pretoria. Biological samples from a group of 15 people exposed to HgCl(2) in herbaria and a non-exposed <span class="hlt">control</span> group of five people were studied. Additionally, plant samples from herbarium specimens treated and non-treated with HgCl(2) were analysed. Plant materials treated with HgCl(2) had persistent high concentrations of Hg in the range of 114-432 microg g(-1), whereas untreated materials were in the range of 0.20-0.<span class="hlt">45</span> microg g(-1). The HgCl(2)-treated plant specimens induced elevated concentrations of Hg into the herbarium rooms near storage cabinets, where up to 1 microg m(-3) of Hg was measured in the air of both herbaria. However, no significant difference in mean Hg concentrations in hair was found between herbarium workers and members of the <span class="hlt">control</span> group, 0.46 and 0.64 microg g(-1) respectively (p0.05, Student's t-test). For both groups, Hg concentrations were lower than that indicated by the World Health Organization [WHO] for non-exposed adults, namely 2 microg g(-1). The mean concentration of total Hg in urine from the <span class="hlt">mercury</span>-exposed herbarium group, 2.28 microg g(-1) creatinine, was significantly higher than in the <span class="hlt">control</span> group, 1.05 microg g(-1) of creatinine. For both populations, the concentrations of Hg in their urine were below the threshold Hg values set by the WHO, i.e., 5 microg g(-1) creatinine. We concluded that there was no strong response by individual herbarium staff from long-term exposure to Hg concentrations in the range of 0.28-1.1 microg m(-3).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70033246','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70033246"><span>Landscape <span class="hlt">controls</span> on <span class="hlt">mercury</span> in streamwater at Acadia National Park, USA</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Peckenham, J.M.; Kahl, J.S.; Nelson, S.J.; Johnson, K.B.; Haines, T.A.</p> <p>2007-01-01</p> <p>Fall and spring streamwater samples were analyzed for total <span class="hlt">mercury</span> (Hg) and major ions from 47 locations on Mount Desert Island in Maine. Samples were collected in zones that were burned in a major wildfire in 1947 and in zones that were not burned. We hypothesized that Hg concentrations in streamwater would be higher from unburned sites than burned watersheds, because fire would volatilize stored Hg. The Hg concentrations, based on burn history, were not statistically distinct. However, significant statistical associations were noted between Hg and the amount of wetlands in the drainage systems and with streamwater dissolved organic carbon (DOC). An unexpected result was that wetlands mobilized more Hg by generating more DOC in total, but upland DOC was more efficient at transporting Hg because it transports more Hg per unit DOC. <span class="hlt">Mercury</span> concentrations were higher in samples collected at lower elevations. <span class="hlt">Mercury</span> was positively correlated with relative discharge, although this effect was not distinguished from the DOC association. In this research, sample site elevation and the presence of upstream wetlands and their associated DOC affected Hg concentrations more strongly than burn history. ?? Springer Science + Business Media B.V. 2007.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1014724-environmental-chamber-measurements-mercury-flux-from-coal-utilization-products','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1014724-environmental-chamber-measurements-mercury-flux-from-coal-utilization-products"><span>Environmental chamber measurements of <span class="hlt">mercury</span> flux from coal utilization by-products</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Pekney, Natalie J.; Martello, Donald; Schroeder, Karl</p> <p>2009-05-01</p> <p>An environmental chamber was constructed to measure the <span class="hlt">mercury</span> flux from coal utilization by-product (CUB) samples. Samples of fly ash, FGD gypsum, and wallboard made from FGD gypsum were tested under both dark and illuminated conditions with or without the addition of water to the sample. <span class="hlt">Mercury</span> releases varied widely, with 7- day experiment averages ranging from -6.8 to 73 ng/m(2) h for the fly ash samples and -5.2 to 335 ng/m(2) h for the FGD/wallboard samples. Initial <span class="hlt">mercury</span> content, fly ash type, and light exposure had no observable consistent effects on the <span class="hlt">mercury</span> flux. For the fly ash samples,more » the effect of a <span class="hlt">mercury</span> <span class="hlt">control</span> technology was to decrease the emission. For three of the four pairs of FGD gypsum and wallboard samples, the wallboard sample released less (or absorbed more) <span class="hlt">mercury</span> than the gypsum.« less</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/947176-environmental-chamber-measurements-mercury-flux-from-coal-utilization-products','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/947176-environmental-chamber-measurements-mercury-flux-from-coal-utilization-products"><span>Environmental chamber measurements of <span class="hlt">mercury</span> flux from coal utilization by-products</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Pekney, N.J.; Martello, D.V.; Schroeder, K.T.</p> <p>2009-05-01</p> <p>An environmental chamber was constructed to measure the <span class="hlt">mercury</span> flux from coal utilization by-product (CUB) samples. Samples of fly ash, FGD gypsum, and wallboard made from FGD gypsum were tested under both dark and illuminated conditions with or without the addition of water to the sample. <span class="hlt">Mercury</span> releases varied widely, with 7-day experiment averages ranging from -6.8 to 73 ng/m2 h for the fly ash samples and -5.2 to 335 ng/m2 h for the FGD/wallboard samples. Initial <span class="hlt">mercury</span> content, fly ash type, and light exposure had no observable consistent effects on the <span class="hlt">mercury</span> flux. For the fly ash samples, themore » effect of a <span class="hlt">mercury</span> <span class="hlt">control</span> technology was to decrease the emission. For three of the four pairs of FGD gypsum and wallboard samples, the wallboard sample released less (or absorbed more) <span class="hlt">mercury</span> than the gypsum.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23234006','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23234006"><span>[<span class="hlt">Mercury</span> pollution in cricket in different biotopes suffering from pollution by zinc smelting].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zheng, Dong-Mei; Li, Xin-Xin; Luo, Qing</p> <p>2012-10-01</p> <p>Total <span class="hlt">mercury</span> contents in cricket bodies were studied in different biotopes in the surrounding of Huludao Zinc Plant to discuss the <span class="hlt">mercury</span> distribution characteristics in cricket and to reveal the effects of environmental <span class="hlt">mercury</span> accumulation in the short life-cycle insects through comparing cricket with other insect species. The average <span class="hlt">mercury</span> content in cricket was 0.081 mg x kg(-1) and much higher than those in the <span class="hlt">control</span> sites (0.012 mg x kg(-1) in average) in different biotopes. <span class="hlt">Mercury</span> contents were found in the order of cricket head > wing > thorax approximately abdomen > leg. <span class="hlt">Mercury</span> contents in cricket bodies varied greatly with sample sites. Significant correlation was found between the <span class="hlt">mercury</span> contents in cricket and the distance from the pollution source as well as the <span class="hlt">mercury</span> contents in plant stems. No significant correlation was found between the <span class="hlt">mercury</span> contents in soil and in cricket bodies. <span class="hlt">Mercury</span> contents in cricket were lower than those in cicadae, similar to those in other insects with shorter life-cycle periods.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27498815','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27498815"><span>Static and dynamic single leg postural <span class="hlt">control</span> performance during dual-<span class="hlt">task</span> paradigms.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Talarico, Maria K; Lynall, Robert C; Mauntel, Timothy C; Weinhold, Paul S; Padua, Darin A; Mihalik, Jason P</p> <p>2017-06-01</p> <p>Combining dynamic postural <span class="hlt">control</span> assessments and cognitive <span class="hlt">tasks</span> may give clinicians a more accurate indication of postural <span class="hlt">control</span> under sport-like conditions compared to single-<span class="hlt">task</span> assessments. We examined postural <span class="hlt">control</span>, cognitive and squatting performance of healthy individuals during static and dynamic postural <span class="hlt">control</span> assessments in single- and dual-<span class="hlt">task</span> paradigms. Thirty participants (female = 22, male = 8; age = 20.8 ± 1.6 years, height = 157.9 ± 13.0 cm, mass = 67.8 ± 20.6 kg) completed single-leg stance and single-leg squat assessments on a force plate individually (single-<span class="hlt">task</span>) and concurrently (dual-<span class="hlt">task</span>) with two cognitive assessments, a modified Stroop test and the Brooks Spatial Memory Test. Outcomes included centre of pressure speed, 95% confidence ellipse, squat depth and speed and cognitive test measures (percentage of correct answers and reaction time). Postural <span class="hlt">control</span> performance varied between postural <span class="hlt">control</span> assessments and testing paradigms. Participants did not squat as deep and squatted slower (P < 0.001) during dual-<span class="hlt">task</span> paradigms (≤12.69 ± 3.4 cm squat depth, ≤16.20 ± 4.6 cm · s -1 squat speed) compared to single-<span class="hlt">task</span> paradigms (14.57 ± 3.6 cm squat depth, 19.65 ± 5.5 cm · s -1 squat speed). The percentage of correct answers did not change across testing conditions, but Stroop reaction time (725.81 ± 59.2 ms; F 2,58 = 7.725, P = 0.001) was slowest during single-leg squats compared to baseline (691.64 ± 80.1 ms; P = 0.038) and single-<span class="hlt">task</span> paradigms (681.33 ± 51.5 ms; P < 0.001). Dynamic dual-<span class="hlt">task</span> assessments may be more challenging to the postural <span class="hlt">control</span> system and may better represent postural <span class="hlt">control</span> performance during dynamic activities.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AtmEn..43.6254P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AtmEn..43.6254P"><span><span class="hlt">Mercury</span> emission trend influenced by stringent air pollutants regulation for coal-fired power plants in Korea</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pudasainee, Deepak; Kim, Jeong-Hun; Seo, Yong-Chil</p> <p>2009-12-01</p> <p>Regulatory <span class="hlt">control</span> of <span class="hlt">mercury</span> emission from anthropogenic sources has become a global concern in the recent past. Coal-fired power plants are one of the largest sources of anthropogenic <span class="hlt">mercury</span> emission into the atmosphere. This paper summarizes the current reducing trend of <span class="hlt">mercury</span> emission as co-beneficial effect by more stringent regulation changes to <span class="hlt">control</span> primary air pollutants with introducing test results from the commercial coal-fired facilities and suggesting a guideline for future regulatory development in Korea. On average, <span class="hlt">mercury</span> emission concentrations ranged 16.3-2.7 μg Sm -3, 2.4-1.1 μg Sm -3, 3.1-0.7 μg Sm -3 from anthracite coal-fired power plants equipped with electrostatic precipitator (ESP), bituminous coal-fired power plants with ESP + flue gas desulphurization (FGD) and bituminous coal-fired power plants with selective catalytic reactor (SCR) + cold side (CS) - ESP + wet FGD, respectively. Among the existing air pollution <span class="hlt">control</span> devices, the best configuration for <span class="hlt">mercury</span> removal in coal-fired power plants was SCR + CS - ESP + wet FGD, which were installed due to the stringent regulation changes to <span class="hlt">control</span> primary air pollutants emission such as SO 2, NOx and dust. It was estimated that uncontrolled and <span class="hlt">controlled</span> <span class="hlt">mercury</span> emission from coal-fired power plants as 10.3 ton yr -1 and 3.2 ton yr -1 respectively. After the installation of ESP, FGD and SCR system, following the enforcement of the stringent regulation, 7.1 ton yr -1 of <span class="hlt">mercury</span> emission has been reduced (nearly 69%) from coal-fired power plants as a co-benefit <span class="hlt">control</span>. Based on the overall study, a sample guideline including emission limits were suggested which will be applied to develop a countermeasure for <span class="hlt">controlling</span> <span class="hlt">mercury</span> emission from coal-fired power plants.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AtmEn..92..421W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AtmEn..92..421W"><span><span class="hlt">Mercury</span> enrichment and its effects on atmospheric emissions in cement plants of China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, Fengyang; Wang, Shuxiao; Zhang, Lei; Yang, Hai; Wu, Qingru; Hao, Jiming</p> <p>2014-08-01</p> <p>The cement industry is one of the most significant anthropogenic sources of atmospheric <span class="hlt">mercury</span> emissions worldwide. In this study of three typical Chinese cement plants, <span class="hlt">mercury</span> in kiln flue gas was sampled using the Ontario Hydro Method (OHM), and solid samples were analyzed. Particulate matter recycling, preheating of raw materials, and the use of coal and flue gas desulfurization derived gypsum contributed to emissions of Hg in the air and to accumulation in cement. Over 90% of the <span class="hlt">mercury</span> input was emitted into the atmosphere. <span class="hlt">Mercury</span> emission factors were 0.044-0.072 g/t clinker for the test plants. The major species emitted into the atmosphere from cement plants is oxidized <span class="hlt">mercury</span>, accounting for 61%-91% of the total <span class="hlt">mercury</span> in flue gas. The results of this study help improve the accuracy of the <span class="hlt">mercury</span> emission inventory in China and provide useful information for developing <span class="hlt">mercury</span> <span class="hlt">controls</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26033418','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26033418"><span>A functional approach for research on cognitive <span class="hlt">control</span>: Analysing cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> and their effects in terms of operant conditioning.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liefooghe, Baptist; De Houwer, Jan</p> <p>2016-02-01</p> <p>Cognitive <span class="hlt">control</span> is an important mental ability that is examined using a multitude of cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> and effects. The present paper presents the first steps in the elaboration of a functional approach, which aims to uncover the communalities and differences between different cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> and their effects. Based on the idea that responses in cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> qualify as operant behaviour, we propose to reinterpret cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> in terms of operant contingencies and cognitive <span class="hlt">control</span> effects as instances of moderated stimulus <span class="hlt">control</span>. We illustrate how our approach can be used to uncover communalities between topographically different cognitive <span class="hlt">control</span> <span class="hlt">tasks</span> and can lead to novel questions about the processes underlying cognitive <span class="hlt">control</span>. © 2015 International Union of Psychological Science.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70006297','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70006297"><span>Formation of nanocolloidal metacinnabar in <span class="hlt">mercury</span>-DOM-sulfide systems</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Gerbig, Chase A.; Kim, Christopher S.; Stegemeier, John P.; Ryan, Joseph N.; Aiken, George R.</p> <p>2011-01-01</p> <p>Direct determination of <span class="hlt">mercury</span> (Hg) speciation in sulfide-containing environments is confounded by low <span class="hlt">mercury</span> concentrations and poor analytical sensitivity. Here we report the results of experiments designed to assess <span class="hlt">mercury</span> speciation at environmentally relevant ratios of <span class="hlt">mercury</span> to dissolved organic matter (DOM) (i.e., <4 nmol Hg (mg DOM)−1) by combining solid phase extraction using C18 resin with extended X-ray absorption fine structure (EXAFS) spectroscopy. Aqueous Hg(II) and a DOM isolate were equilibrated in the presence and absence of 100 μM total sulfide. In the absence of sulfide, <span class="hlt">mercury</span> adsorption to the resin increased as the Hg:DOM ratio decreased and as the strength of Hg-DOM binding increased. EXAFS analysis indicated that in the absence of sulfide, <span class="hlt">mercury</span> bonds with an average of 2.4 ± 0.2 sulfur atoms with a bond length typical of <span class="hlt">mercury</span>-organic thiol ligands (2.35 Å). In the presence of sulfide, <span class="hlt">mercury</span> showed greater affinity for the C18 resin, and its chromatographic behavior was independent of Hg:DOM ratio. EXAFS analysis showed mercury–sulfur bonds with a longer interatomic distance (2.51–2.53 Å) similar to the mercury–sulfur bond distance in metacinnabar (2.53 Å) regardless of the Hg:DOM ratio. For all samples containing sulfide, the sulfur coordination number was below the ideal four-coordinate structure of metacinnabar. At a low Hg:DOM ratio where strong binding DOM sites may <span class="hlt">control</span> <span class="hlt">mercury</span> speciation (1.9 nmol mg–1) <span class="hlt">mercury</span> was coordinated by 2.3 ± 0.2 sulfur atoms, and the coordination number rose with increasing Hg:DOM ratio. The less-than-ideal coordination numbers indicate metacinnabar-like species on the nanometer scale, and the positive correlation between Hg:DOM ratio and sulfur coordination number suggests progressively increasing particle size or crystalline order with increasing abundance of <span class="hlt">mercury</span> with respect to DOM. In DOM-containing sulfidic systems nanocolloidal metacinnabar-like species may form</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002EGSGA..27.4139K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002EGSGA..27.4139K"><span>Progress In Ground Based <span class="hlt">Mercury</span>'s Imaging</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ksanfomality, L.</p> <p></p> <p> (CCD) camera. A great advantage of the observations at this Observatory was its considerable height above sea level (about 1700 m), which is important for obser- vations at large zenith distances.The AZT-11 telescope (D = 1.25 m, the Cassegrain focus F = 16 m) was used as a long-focus instrument. Due to a random fortunate co- incidence, the phase and position of the planet happened to be virtually the same as 1 in 1974, when <span class="hlt">Mercury</span> was observed from the Mariner-10 spacecraft. Exposures as short as 3 ms and up to 70 ms were used. The atmospheric condition on November 3rd for about <span class="hlt">45</span> min got unusually clear, and about 300 of electronic images of different quality were gathered. Using a sophisticated technique processing of observationally independent data rows resulted in many compositional electronic images with a num- ber of small features, never seen before and repeating times and again, which could be successfully compared the Mariner-10 mosaic. A set of the images is presented. 2</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/21233573-investigation-mercury-speciation-technique-flue-gas-desulfurization-materials','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/21233573-investigation-mercury-speciation-technique-flue-gas-desulfurization-materials"><span>Investigation of a <span class="hlt">mercury</span> speciation technique for flue gas desulfurization materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Lee, J.Y.; Cho K.; Cheng L.</p> <p>2009-08-15</p> <p>Most of the synthetic gypsum generated from wet flue gas desulfurization (FGD) scrubbers is currently being used for wallboard production. Because oxidized <span class="hlt">mercury</span> is readily captured by the wet FGD scrubber, and coal-fired power plants equipped with wet scrubbers desire to benefit from the partial <span class="hlt">mercury</span> <span class="hlt">control</span> that these systems provide, some <span class="hlt">mercury</span> is likely to be bound in with the FGD gypsum and wallboard. In this study, the feasibility of identifying <span class="hlt">mercury</span> species in the FGD gypsum and wallboard samples was investigated using a large sample size thermal desorption method and samples from power plants in Pennsylvania. Potential candidatesmore » of pure <span class="hlt">mercury</span> standards including mercuric chloride, mercurous chloride, <span class="hlt">mercury</span> oxide, <span class="hlt">mercury</span> sulfide, and mercuric sulfate were analyzed to compare their results with those obtained from FGD gypsum and dry wallboard samples. Although any of the thermal evolutionary curves obtained from these pure <span class="hlt">mercury</span> standards did not exactly match with those of the FGD gypsum and wallboard samples, it was identified that Hg{sub 2}Cl{sub 2} and HgCl{sub 2} could be candidates. An additional chlorine analysis from the gypsum and wallboard samples indicated that the chlorine concentrations were approximately 2 orders of magnitude higher than the <span class="hlt">mercury</span> concentrations, suggesting possible chlorine association with <span class="hlt">mercury</span>. 21 refs., 5 figs., 3 tabs.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.atsdr.cdc.gov/mercury/docs/11-229617-E-508_HealthEffects.pdf','NIH-MEDLINEPLUS'); return false;" href="https://www.atsdr.cdc.gov/mercury/docs/11-229617-E-508_HealthEffects.pdf"><span><span class="hlt">Mercury</span> Quick Facts: Health Effects of <span class="hlt">Mercury</span> Exposure</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... up in tiny cracks and spaces in your house. • • <span class="hlt">Mercury</span> can vaporize (evaporate) into the air in your house. The vapor cannot be seen or smelled. • • <span class="hlt">Mercury</span> ... up in tiny cracks and spaces in your house. • • Can vaporize (evaporate) into the air in your ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23589708','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23589708"><span>Evaluation of the memory effect on gold-coated silica adsorption tubes used for the analysis of gaseous <span class="hlt">mercury</span> by cold vapor atomic absorption spectrometry.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rahman, Mohammad Mahmudur; Brown, Richard J C; Kim, Ki-Hyun; Yoon, Hye-On; Phan, Nhu-Thuc</p> <p>2013-01-01</p> <p>In an effort to reduce the experimental bias involved in the analysis of gaseous elemental <span class="hlt">mercury</span> (Hg(o)), the blank response from gold-coated adsorption tubes has been investigated using cold vapor atomic absorption spectrometry (CVAAS). Our study has been compared with our recent investigation on memory effect in a cold vapour atomic fluorescence spectrometry (CVAFS). The pattern of blank responses was quantified after loading different amounts of <span class="hlt">mercury</span> and after different time intervals of 1, 14, and <span class="hlt">45</span> days. In case of the one day interval, the result of five to six instant blank heating cycles confirmed successful liberation of <span class="hlt">mercury</span> following the second and third blank heating cycles. The results of 14 or <span class="hlt">45</span> days generally suggest that liberation of excess <span class="hlt">mercury</span> is affected by both the initial loading amount and the length of storage time prior to analysis. We have demonstrated a possibly effective way to reduce memory effects. Some similarities of these results with those from CVAFS experiment suggests that the blank response is caused by a combination of <span class="hlt">mercury</span> absorbed within the bulk gold and micro- and nanoparticles liberated during heating and not from coabsorbing interfering gaseous species.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3621292','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3621292"><span>Evaluation of the Memory Effect on Gold-Coated Silica Adsorption Tubes Used for the Analysis of Gaseous <span class="hlt">Mercury</span> by Cold Vapor Atomic Absorption Spectrometry</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Rahman, Mohammad Mahmudur; Brown, Richard J. C.; Yoon, Hye-On; Phan, Nhu-Thuc</p> <p>2013-01-01</p> <p>In an effort to reduce the experimental bias involved in the analysis of gaseous elemental <span class="hlt">mercury</span> (Hgo), the blank response from gold-coated adsorption tubes has been investigated using cold vapor atomic absorption spectrometry (CVAAS). Our study has been compared with our recent investigation on memory effect in a cold vapour atomic fluorescence spectrometry (CVAFS). The pattern of blank responses was quantified after loading different amounts of <span class="hlt">mercury</span> and after different time intervals of 1, 14, and <span class="hlt">45</span> days. In case of the one day interval, the result of five to six instant blank heating cycles confirmed successful liberation of <span class="hlt">mercury</span> following the second and third blank heating cycles. The results of 14 or <span class="hlt">45</span> days generally suggest that liberation of excess <span class="hlt">mercury</span> is affected by both the initial loading amount and the length of storage time prior to analysis. We have demonstrated a possibly effective way to reduce memory effects. Some similarities of these results with those from CVAFS experiment suggests that the blank response is caused by a combination of <span class="hlt">mercury</span> absorbed within the bulk gold and micro- and nanoparticles liberated during heating and not from coabsorbing interfering gaseous species. PMID:23589708</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25387037','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25387037"><span>Children's construction <span class="hlt">task</span> performance and spatial ability: <span class="hlt">controlling</span> <span class="hlt">task</span> complexity and predicting mathematics performance.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Richardson, Miles; Hunt, Thomas E; Richardson, Cassandra</p> <p>2014-12-01</p> <p>This paper presents a methodology to <span class="hlt">control</span> construction <span class="hlt">task</span> complexity and examined the relationships between construction performance and spatial and mathematical abilities in children. The study included three groups of children (N = 96); ages 7-8, 10-11, and 13-14 years. Each group constructed seven pre-specified objects. The study replicated and extended previous findings that indicated that the extent of component symmetry and variety, and the number of components for each object and available for selection, significantly predicted construction <span class="hlt">task</span> difficulty. Results showed that this methodology is a valid and reliable technique for assessing and predicting construction play <span class="hlt">task</span> difficulty. Furthermore, construction play performance predicted mathematical attainment independently of spatial ability.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25283557','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25283557"><span>Rethinking volitional <span class="hlt">control</span> over <span class="hlt">task</span> choice in multitask environments: use of a stimulus set selection strategy in voluntary <span class="hlt">task</span> switching.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Arrington, Catherine M; Weaver, Starla M</p> <p>2015-01-01</p> <p>Under conditions of volitional <span class="hlt">control</span> in multitask environments, subjects may engage in a variety of strategies to guide <span class="hlt">task</span> selection. The current research examines whether subjects may sometimes use a top-down <span class="hlt">control</span> strategy of selecting a <span class="hlt">task</span>-irrelevant stimulus dimension, such as location, to guide <span class="hlt">task</span> selection. We term this approach a stimulus set selection strategy. Using a voluntary <span class="hlt">task</span> switching procedure, subjects voluntarily switched between categorizing letter and number stimuli that appeared in two, four, or eight possible target locations. Effects of stimulus availability, manipulated by varying the stimulus onset asynchrony between the two target stimuli, and location repetition were analysed to assess the use of a stimulus set selection strategy. Considered across position condition, Experiment 1 showed effects of both stimulus availability and location repetition on <span class="hlt">task</span> choice suggesting that only in the 2-position condition, where selection based on location always results in a target at the selected location, subjects may have been using a stimulus set selection strategy on some trials. Experiment 2 replicated and extended these findings in a visually more cluttered environment. These results indicate that, contrary to current models of <span class="hlt">task</span> selection in voluntary <span class="hlt">task</span> switching, the top-down <span class="hlt">control</span> of <span class="hlt">task</span> selection may occur in the absence of the formation of an intention to perform a particular <span class="hlt">task</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28555275','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28555275"><span><span class="hlt">Control</span> of force during rapid visuomotor force-matching <span class="hlt">tasks</span> can be described by discrete time PID <span class="hlt">control</span> algorithms.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dideriksen, Jakob Lund; Feeney, Daniel F; Almuklass, Awad M; Enoka, Roger M</p> <p>2017-08-01</p> <p>Force trajectories during isometric force-matching <span class="hlt">tasks</span> involving isometric contractions vary substantially across individuals. In this study, we investigated if this variability can be explained by discrete time proportional, integral, derivative (PID) <span class="hlt">control</span> algorithms with varying model parameters. To this end, we analyzed the pinch force trajectories of 24 subjects performing two rapid force-matching <span class="hlt">tasks</span> with visual feedback. Both <span class="hlt">tasks</span> involved isometric contractions to a target force of 10% maximal voluntary contraction. One <span class="hlt">task</span> involved a single action (pinch) and the other required a double action (concurrent pinch and wrist extension). 50,000 force trajectories were simulated with a computational neuromuscular model whose input was determined by a PID <span class="hlt">controller</span> with different PID gains and frequencies at which the <span class="hlt">controller</span> adjusted muscle commands. The goal was to find the best match between each experimental force trajectory and all simulated trajectories. It was possible to identify one realization of the PID <span class="hlt">controller</span> that matched the experimental force produced during each <span class="hlt">task</span> for most subjects (average index of similarity: 0.87 ± 0.12; 1 = perfect similarity). The similarities for both <span class="hlt">tasks</span> were significantly greater than that would be expected by chance (single action: p = 0.01; double action: p = 0.04). Furthermore, the identified <span class="hlt">control</span> frequencies in the simulated PID <span class="hlt">controller</span> with the greatest similarities decreased as <span class="hlt">task</span> difficulty increased (single action: 4.0 ± 1.8 Hz; double action: 3.1 ± 1.3 Hz). Overall, the results indicate that discrete time PID <span class="hlt">controllers</span> are realistic models for the neural <span class="hlt">control</span> of force in rapid force-matching <span class="hlt">tasks</span> involving isometric contractions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/fs/1995/fs216-95/pdf/fs21695.pdf','USGSPUBS'); return false;" href="https://pubs.usgs.gov/fs/1995/fs216-95/pdf/fs21695.pdf"><span><span class="hlt">Mercury</span> contamination of aquatic ecosystems</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Krabbenhoft, David P.; Rickert, David A.</p> <p>1995-01-01</p> <p><span class="hlt">Mercury</span> has been well known as an environmental pollutant for several decades. As early as the 1950's it was established that emissions of <span class="hlt">mercury</span> to the environment could have serious effects on human health. These early studies demonstrated that fish and other wildlife from various ecosystems commonly attain <span class="hlt">mercury</span> levels of toxicological concern when directly affected by <span class="hlt">mercury</span>-containing emissions from human-related activities. Human health concerns arise when fish and wildlife from these ecosystems are consumed by humans. During the past decade, a new trend has emerged with regard to <span class="hlt">mercury</span> pollution. Investigations initiated in the late 1980's in the northern-tier states of the U.S., Canada, and Nordic countries found that fish, mainly from nutrient-poor lakes and often in very remote areas, commonly have high levels of <span class="hlt">mercury</span>. More recent fish sampling surveys in other regions of the U.S. have shown widespread <span class="hlt">mercury</span> contamination in streams, wet-lands, reservoirs, and lakes. To date, 33 states have issued fish consumption advisories because of <span class="hlt">mercury</span> contamination. These continental to global scale occurrences of <span class="hlt">mercury</span> contamination cannot be linked to individual emissions of <span class="hlt">mercury</span>, but instead are due to widespread air pollution. When scientists measure <span class="hlt">mercury</span> levels in air and surface water, however, the observed levels are extraordinarily low. In fact, scientists have to take extreme precautions to avoid direct contact with water samples or sample containers, to avert sample contamination (Fig 3). Herein lies an apparent discrepancy: Why do fish from some remote areas have elevated <span class="hlt">mercury</span> concentrations, when contamination levels in the environment are so low?</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18394592','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18394592"><span>Non-visual spatial <span class="hlt">tasks</span> reveal increased interactions with stance postural <span class="hlt">control</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Woollacott, Marjorie; Vander Velde, Timothy</p> <p>2008-05-07</p> <p>The current investigation aimed to contrast the level and quality of dual-<span class="hlt">task</span> interactions resulting from the combined performance of a challenging primary postural <span class="hlt">task</span> and three specific, yet categorically dissociated, secondary central executive <span class="hlt">tasks</span>. Experiments determined the extent to which modality (visual vs. auditory) and code (non-spatial vs. spatial) specific cognitive resources contributed to postural interference in young adults (n=9) in a dual-<span class="hlt">task</span> setting. We hypothesized that the different forms of executive n-back <span class="hlt">task</span> processing employed (visual-object, auditory-object and auditory-spatial) would display contrasting levels of interactions with tandem Romberg stance postural <span class="hlt">control</span>, and that interactions within the spatial domain would be revealed as most vulnerable to dual-<span class="hlt">task</span> interactions. Across all cognitive <span class="hlt">tasks</span> employed, including auditory-object (aOBJ), auditory-spatial (aSPA), and visual-object (vOBJ) <span class="hlt">tasks</span>, increasing n-back <span class="hlt">task</span> complexity produced correlated increases in verbal reaction time measures. Increasing cognitive <span class="hlt">task</span> complexity also resulted in consistent decreases in judgment accuracy. Postural performance was significantly influenced by the type of cognitive loading delivered. At comparable levels of cognitive <span class="hlt">task</span> difficulty (n-back demands and accuracy judgments) the performance of challenging auditory-spatial <span class="hlt">tasks</span> produced significantly greater levels of postural sway than either the auditory-object or visual-object based <span class="hlt">tasks</span>. These results suggest that it is the employment of limited non-visual spatially based coding resources that may underlie previously observed visual dual-<span class="hlt">task</span> interference effects with stance postural <span class="hlt">control</span> in healthy young adults.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFMIN31C..05P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFMIN31C..05P"><span><span class="hlt">Mercury</span>- Distributed Metadata Management, Data Discovery and Access System</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Palanisamy, Giri; Wilson, Bruce E.; Devarakonda, Ranjeet; Green, James M.</p> <p>2007-12-01</p> <p><span class="hlt">Mercury</span> is a federated metadata harvesting, search and retrieval tool based on both open source and ORNL- developed software. It was originally developed for NASA, and the <span class="hlt">Mercury</span> development consortium now includes funding from NASA, USGS, and DOE. <span class="hlt">Mercury</span> supports various metadata standards including XML, Z39.50, FGDC, Dublin-Core, Darwin-Core, EML, and ISO-19115 (under development). <span class="hlt">Mercury</span> provides a single portal to information contained in disparate data management systems. It collects metadata and key data from contributing project servers distributed around the world and builds a centralized index. The <span class="hlt">Mercury</span> search interfaces then allow the users to perform simple, fielded, spatial and temporal searches across these metadata sources. This centralized repository of metadata with distributed data sources provides extremely fast search results to the user, while allowing data providers to advertise the availability of their data and maintain complete <span class="hlt">control</span> and ownership of that data. <span class="hlt">Mercury</span> supports various projects including: ORNL DAAC, NBII, DADDI, LBA, NARSTO, CDIAC, OCEAN, I3N, IAI, ESIP and ARM. The new <span class="hlt">Mercury</span> system is based on a Service Oriented Architecture and supports various services such as Thesaurus Service, Gazetteer Web Service and UDDI Directory Services. This system also provides various search services including: RSS, Geo-RSS, OpenSearch, Web Services and Portlets. Other features include: Filtering and dynamic sorting of search results, book-markable search results, save, retrieve, and modify search criteria.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100005251','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100005251"><span>Integrity Monitoring of <span class="hlt">Mercury</span> Discharge Lamps</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Tjoelker, Robert L.</p> <p>2010-01-01</p> <p><span class="hlt">Mercury</span> discharge lamps are critical in many trapped ion frequency standard applications. An integrity monitoring system can be implemented using end-of-life signatures observed in operational <span class="hlt">mercury</span> discharge lamps, making it possible to forecast imminent failure and to take action to mitigate the consequences (such as switching to a redundant system). <span class="hlt">Mercury</span> lamps are used as a source of 194-nm ultraviolet radiation for optical pumping and state selection of <span class="hlt">mercury</span> trapped ion frequency standards. Lamps are typically fabricated using 202Hg distilled into high-purity quartz, or other 194-nm transmitting material (e.g., sapphire). A buffer gas is also placed into the bulb, typically a noble gas such as argon, neon, or krypton. The bulbs are driven by strong RF fields oscillating at .200 MHz. The lamp output may age over time by two internal mechanisms: (1) the darkening of the bulb that attenuates light transmission and (2) the loss of <span class="hlt">mercury</span> due to migration or chemical interactions with the bulb surface. During fabrication, excess <span class="hlt">mercury</span> is placed into a bulb, so that the loss rate is compensated with new <span class="hlt">mercury</span> emanating from a cool tip or adjacent reservoir. The light output is nearly constant or varies slightly at a constant rate for many months/years until the <span class="hlt">mercury</span> source is depleted. At this point, the vapor pressure abruptly falls and the total light output and atomic clock SNR (signal-to-noise ratio) decrease. After several days to weeks, the light levels decrease to a point where the atomic clock SNR is no longer sufficient to stay in lock, or the lamp self-extinguishes. This signature has been observed in four separate end-of-life lamp failures while operating in the Deep Space Network (DSN). A simple integrator circuit can observe and document steady-state lamp behavior. When the light levels drop over a predetermined time interval by a specified amount (e.g., 20 percent), an alarm is set. For critical operational applications, such as the DSN</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22291628','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22291628"><span>Can <span class="hlt">task</span>-switching training enhance executive <span class="hlt">control</span> functioning in children with attention deficit/-hyperactivity disorder?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kray, Jutta; Karbach, Julia; Haenig, Susann; Freitag, Christine</p> <p>2011-01-01</p> <p>The key cognitive impairments of children with attention deficit/-hyperactivity disorder (ADHD) include executive <span class="hlt">control</span> functions such as inhibitory <span class="hlt">control</span>, <span class="hlt">task</span>-switching, and working memory (WM). In this training study we examined whether <span class="hlt">task</span>-switching training leads to improvements in these functions. Twenty children with combined type ADHD and stable methylphenidate medication performed a single-<span class="hlt">task</span> and a <span class="hlt">task</span>-switching training in a crossover training design. The children were randomly assigned to one of two groups. One group started with the single-<span class="hlt">task</span> training and then performed the <span class="hlt">task</span>-switching training and the other group vice versa. The effectiveness of the <span class="hlt">task</span>-switching training was measured as performance improvements (relative to the single-<span class="hlt">task</span> training) on a structurally similar but new switching <span class="hlt">task</span> and on other executive <span class="hlt">control</span> <span class="hlt">tasks</span> measuring inhibitory <span class="hlt">control</span> and verbal WM as well as on fluid intelligence (reasoning). The children in both groups showed improvements in <span class="hlt">task</span>-switching, that is, a reduction of switching costs, but not in performing the single-<span class="hlt">tasks</span> across four training sessions. Moreover, the <span class="hlt">task</span>-switching training lead to selective enhancements in <span class="hlt">task</span>-switching performance, that is, the reduction of <span class="hlt">task</span>-switching costs was found to be larger after <span class="hlt">task</span>-switching than after single-<span class="hlt">task</span> training. Similar selective improvements were observed for inhibitory <span class="hlt">control</span> and verbal WM, but not for reasoning. Results of this study suggest that <span class="hlt">task</span>-switching training is an effective cognitive intervention that helps to enhance executive <span class="hlt">control</span> functioning in children with ADHD.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3250077','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3250077"><span>Can <span class="hlt">Task</span>-Switching Training Enhance Executive <span class="hlt">Control</span> Functioning in Children with Attention Deficit/-Hyperactivity Disorder?</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Kray, Jutta; Karbach, Julia; Haenig, Susann; Freitag, Christine</p> <p>2012-01-01</p> <p>The key cognitive impairments of children with attention deficit/-hyperactivity disorder (ADHD) include executive <span class="hlt">control</span> functions such as inhibitory <span class="hlt">control</span>, <span class="hlt">task</span>-switching, and working memory (WM). In this training study we examined whether <span class="hlt">task</span>-switching training leads to improvements in these functions. Twenty children with combined type ADHD and stable methylphenidate medication performed a single-<span class="hlt">task</span> and a <span class="hlt">task</span>-switching training in a crossover training design. The children were randomly assigned to one of two groups. One group started with the single-<span class="hlt">task</span> training and then performed the <span class="hlt">task</span>-switching training and the other group vice versa. The effectiveness of the <span class="hlt">task</span>-switching training was measured as performance improvements (relative to the single-<span class="hlt">task</span> training) on a structurally similar but new switching <span class="hlt">task</span> and on other executive <span class="hlt">control</span> <span class="hlt">tasks</span> measuring inhibitory <span class="hlt">control</span> and verbal WM as well as on fluid intelligence (reasoning). The children in both groups showed improvements in <span class="hlt">task</span>-switching, that is, a reduction of switching costs, but not in performing the single-<span class="hlt">tasks</span> across four training sessions. Moreover, the <span class="hlt">task</span>-switching training lead to selective enhancements in <span class="hlt">task</span>-switching performance, that is, the reduction of <span class="hlt">task</span>-switching costs was found to be larger after <span class="hlt">task</span>-switching than after single-<span class="hlt">task</span> training. Similar selective improvements were observed for inhibitory <span class="hlt">control</span> and verbal WM, but not for reasoning. Results of this study suggest that <span class="hlt">task</span>-switching training is an effective cognitive intervention that helps to enhance executive <span class="hlt">control</span> functioning in children with ADHD. PMID:22291628</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17368516','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17368516"><span>Bioaccumulation of <span class="hlt">mercury</span> in benthic communities of a river ecosystem affected by <span class="hlt">mercury</span> mining.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zizek, Suzana; Horvat, Milena; Gibicar, Darija; Fajon, Vesna; Toman, Mihael J</p> <p>2007-05-15</p> <p>The presence of <span class="hlt">mercury</span> in the river Idrijca (Slovenia) is mainly due to 500 years of <span class="hlt">mercury</span> mining in this region. In order to understand the cycling of <span class="hlt">mercury</span> in the Idrijca ecosystem it is crucial to investigate the role of biota. This study is part of an ongoing investigation of <span class="hlt">mercury</span> biogeochemistry in the river Idrijca, focusing on the accumulation and speciation of <span class="hlt">mercury</span> in the lower levels of the food chain, namely filamentous algae, periphyton and macroinvertebrates. <span class="hlt">Mercury</span> analysis and speciation in the biota and in water were performed during the spring, summer and autumn seasons at four locations on the river, representing different degrees of <span class="hlt">mercury</span> contamination. Total (THg) and methyl <span class="hlt">mercury</span> (MeHg) were measured. The results showed that the highest THg concentrations in biota correlate well with THg levels in sediments and water. The level of MeHg is spatially and seasonally variable, showing higher values at the most contaminated sites during the summer and autumn periods. The percentage of Hg as MeHg increases with the trophic level from water (0.1-0.8%), algae (0.5-1.3%), periphyton (1.6-8.8%) to macroinvertebrates (0.1-100%), which indicates active transformation, accumulation and magnification of <span class="hlt">mercury</span> in the benthic organism of this heavily contaminated torrential river.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/servlets/purl/1262320','SCIGOV-STC'); return false;" href="https://www.osti.gov/servlets/purl/1262320"><span><span class="hlt">Mercury</span> Phase II Study - <span class="hlt">Mercury</span> Behavior across the High-Level Waste Evaporator System</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Bannochie, C. J.; Crawford, C. L.; Jackson, D. G.</p> <p>2016-06-17</p> <p>The <span class="hlt">Mercury</span> Program team’s effort continues to develop more fundamental information concerning <span class="hlt">mercury</span> behavior across the liquid waste facilities and unit operations. Previously, the team examined the <span class="hlt">mercury</span> chemistry across salt processing, including the Actinide Removal Process/Modular Caustic Side Solvent Extraction Unit (ARP/MCU), and the Defense Waste Processing Facility (DWPF) flowsheets. This report documents the data and understanding of <span class="hlt">mercury</span> across the high level waste 2H and 3H evaporator systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15468538','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15468538"><span>Understanding the <span class="hlt">mercury</span> reduction issue: the impact of <span class="hlt">mercury</span> on the environment and human health.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kao, Richard T; Dault, Scott; Pichay, Teresa</p> <p>2004-07-01</p> <p><span class="hlt">Mercury</span> has been used in both medicine and dentistry for centuries. Recent media attention regarding the increased levels of <span class="hlt">mercury</span> in dietary fish, high levels of <span class="hlt">mercury</span> in air emissions, and conjecture that certain diseases may be caused by <span class="hlt">mercury</span> exposure has increased public awareness of the potential adverse health effects of high doses of <span class="hlt">mercury</span>. Dentistry has been criticized for its continued use of <span class="hlt">mercury</span> in dental amalgam for both public health and environmental reasons. To address these concerns, dental professionals should understand the impact of the various levels and types of <span class="hlt">mercury</span> on the environment and human health. <span class="hlt">Mercury</span> is unique in its ability to form amalgams with other metals. Dental amalgam--consisting of silver, copper, tin, and <span class="hlt">mercury</span>--has been used as a safe, stable, and cost-effective restorative material for more than 150 years. As a result of this use, the dental profession has been confronted by the public on two separate health issues concerning the <span class="hlt">mercury</span> content in amalgam. The first issue is whether the <span class="hlt">mercury</span> amalgamated with the various metals to create dental restorations poses a health issue for patients. The second is whether the scraps associated with amalgam placement and the removal of amalgam restorations poses environmental hazards which may eventually have an impact on human health. Despite the lack of scientific evidence for such hazards, there is growing pressure for the dental profession to address these health issues. In this article, the toxicology of <span class="hlt">mercury</span> will be reviewed and the impact of amalgam on health and the environment will be examined.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/1035698-chemical-form-matters-differential-accumulation-mercury-following-inorganic-organic-mercury-exposures-zebrafish-larvae','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/1035698-chemical-form-matters-differential-accumulation-mercury-following-inorganic-organic-mercury-exposures-zebrafish-larvae"><span>Chemical Form Matters: Differential Accumulation of <span class="hlt">Mercury</span> Following Inorganic and Organic <span class="hlt">Mercury</span> Exposures in Zebrafish Larvae</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Korbas, Malgorzata; MacDonald, Tracy C.; Pickering, Ingrid J.</p> <p>2013-04-08</p> <p><span class="hlt">Mercury</span>, one of the most toxic elements, exists in various chemical forms each with different toxicities and health implications. Some methylated <span class="hlt">mercury</span> forms, one of which exists in fish and other seafood products, pose a potential threat, especially during embryonic and early postnatal development. Despite global concerns, little is known about the mechanisms underlying transport and toxicity of different <span class="hlt">mercury</span> species. To investigate the impact of different <span class="hlt">mercury</span> chemical forms on vertebrate development, we have successfully combined the zebrafish, a well-established developmental biology model system, with synchrotron-based X-ray fluorescence imaging. Our work revealed substantial differences in tissue-specific accumulation patterns ofmore » <span class="hlt">mercury</span> in zebrafish larvae exposed to four different <span class="hlt">mercury</span> formulations in water. Methylmercury species not only resulted in overall higher <span class="hlt">mercury</span> burdens but also targeted different cells and tissues than their inorganic counterparts, thus revealing a significant role of speciation in cellular and molecular targeting and <span class="hlt">mercury</span> sequestration. For methylmercury species, the highest <span class="hlt">mercury</span> concentrations were in the eye lens epithelial cells, independent of the formulation ligand (chloride versus L-cysteine). For inorganic <span class="hlt">mercury</span> species, in absence of L-cysteine, the olfactory epithelium and kidney accumulated the greatest amounts of <span class="hlt">mercury</span>. However, with L-cysteine present in the treatment solution, mercuric bis-L-cysteineate species dominated the treatment, significantly decreasing uptake. Our results clearly demonstrate that the common differentiation between organic and inorganic <span class="hlt">mercury</span> is not sufficient to determine the toxicity of various <span class="hlt">mercury</span> species.« less</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17963130','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17963130"><span>Evaluation of <span class="hlt">mercury</span> contamination in Smilax myosotiflora herbal preparations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ang, Hooi-Hoon; Lee, Kheng-Leng</p> <p>2007-01-01</p> <p>The DCA (Drug <span class="hlt">Control</span> Authority) of Malaysia implemented phase 3 registration of traditional medicines in January 1992 with special emphasis on the quality, efficacy, and safety of all dosage forms of these medicines. For this reason, a total of 100 herbal products containing Smilax myosotiflora were purchased in the Malaysian market and analyzed for <span class="hlt">mercury</span> content, as <span class="hlt">mercury</span> is a recognized reproductive toxicant. The products were analyzed using cold vapor atomic absorption spectrophotometry. It was found that 89% of the above products do not exceed 0.5 ppm of <span class="hlt">mercury</span>. Heavy metal poisoning such as <span class="hlt">mercury</span> has been associated with traditional medicines. Therefore, it is important that doctors and health care practitioners are aware of these risks and finding ways to minimize them, including questions pertaining to the use of these remedies during the routine taking of a patient's history.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/5210097','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/5210097"><span><span class="hlt">Mercury</span> poisoning in wildlife</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, G.H.; Fairbrother, Anne; Locke, Louis N.; Hoff, Gerald L.</p> <p>1996-01-01</p> <p><span class="hlt">Mercury</span> is an intriguing contaminant because it has complex chemical properties, a wide range of harmful effects, and an infinite persistence in the environment. Die-offs of wildlife due to <span class="hlt">mercury</span> have occurred in many countries, especially before <span class="hlt">mercury</span> seed dressings were banned. Today, most <span class="hlt">mercury</span> problems are associated with aquatic environments. Methylmercury, the most toxic chemical form, attacks many organ systems, but damage to the central nervous system is most severe. Harmful wet-weight concentrations of <span class="hlt">mercury</span>, as methylmercury, in the tissues of adult birds and mammals range from about 8-30 ppm in the brain, 20-60 ppm in liver, 20-60 ppm in kidney, and 15-30 ppm in muscle. Young animals may be more sensitive.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/biblio/22689512-mercury-concentrations-urine-amerindian-populations-near-oil-fields-peruvian-ecuadorian-amazon','SCIGOV-STC'); return false;" href="https://www.osti.gov/biblio/22689512-mercury-concentrations-urine-amerindian-populations-near-oil-fields-peruvian-ecuadorian-amazon"><span><span class="hlt">Mercury</span> concentrations in urine of amerindian populations near oil fields in the peruvian and ecuadorian amazon</span></a></p> <p><a target="_blank" href="http://www.osti.gov/search">DOE Office of Scientific and Technical Information (OSTI.GOV)</a></p> <p>Webb, Jena, E-mail: jena.webb@mail.mcgill.ca</p> <p></p> <p>Background: <span class="hlt">Mercury</span> is a global contaminant with toxic, persistent effects on human health. Petroleum extraction is an important source of elemental <span class="hlt">mercury</span>; little is known about human exposure levels near oil fields in the Amazon basin. Objectives: To characterize <span class="hlt">mercury</span> levels in people living near oil production sites in the Peruvian and Ecuadorian Amazon, <span class="hlt">controlling</span> for fish consumption, occupation, source of water and socio-demographic characteristics. Methods: Analyze <span class="hlt">mercury</span> levels in urine samples using cold vapour atomic fluorescence spectrometry from 76 indigenous men and women in eight riverine communities situated near oil wells or pipelines. Subjects answered a questionnaire soliciting socio-demographic,more » occupational and dietary information. Data were analyzed using multiple linear regression modeling. Results: The mean value of U-Hg was 2.61 μg/g creatinine (95% CI: 2.14–3.08), with 7% of the sample recording values above the global background standard suggested by The World Health Organization (5 μg/g creatinine). Women who used water from a surface source had two and a half times the amount of <span class="hlt">mercury</span> in their urine (mean=3.70 μg/g creatinine, 95% CI: 2.26–5.15) compared with women who used other water sources (mean =1.39 μg/g creatinine, 95% CI: 0.51–2.25). Men who were involved in an oil clean-up operation had twice as much <span class="hlt">mercury</span> in their urine (mean =3.07 μg/g creatinine, 95% CI: 1.97–4.16) as did those who worked on other <span class="hlt">tasks</span> (mean =1.56 μg/g creatinine, 95% CI: 1.48–2.65). <span class="hlt">Mercury</span> levels were not associated with the number of fish meals per week. Conclusions: Indigenous peoples of the Peruvian and Ecuadorian Amazon living near oil production sites generally had urine <span class="hlt">mercury</span> levels within the global background standard suggested by the World Health Organization. Increased levels of <span class="hlt">mercury</span> in urine were detected for men involved in oil spill remediation and for women who relied on surface water for household needs</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.P43F..08R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.P43F..08R"><span>Simulation Study of Solar Wind Interaction with <span class="hlt">Mercury</span>'s Magnetosphere</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Richer, E.; Modolo, R.; Chanteur, G. M.; Hess, S.; Mancini, M.; Leblanc, F.</p> <p>2011-12-01</p> <p>The three flybys of Mariner 10, the numerous terrestrial observations of <span class="hlt">Mercury</span>'s exosphere and the recent flybys of MESSENGER [1] have brought important information about the Hermean environment. <span class="hlt">Mercury</span>'s intrinsic magnetic field is principally dipolar and its interaction with the Solar Wind (SW) creates a small and very dynamic magnetosphere. <span class="hlt">Mercury</span>'s exosphere is a highly variable [2] and complex neutral environment made of several species : H, He, O, Na, K, Ca, and Mg have already been detected [3,4]. The small number of in situ observations and the fact that the Hermean magnetospheric activity is not observable from Earth make simulation studies of the Hermean environment a useful tool to understand the global interaction of the SW with <span class="hlt">Mercury</span>. This study presents simulation results from a 3-dimensional parallel multi-species hybrid model of <span class="hlt">Mercury</span>'s magnetosphere interaction with the SW. The SW in this model is representative of conditions at <span class="hlt">Mercury</span>'s aphelion (0.47AU) and is composed of 95% protons and 5% alpha particles. The simulated IMF is oriented accordingly observations during the first flyby of MESSENGER on January 2008 with a cone angle of ~<span class="hlt">45</span>°. A neutral corona of atomic hydrogen is included in this model and is partly ionized by solar photons, electron impacts and charge exchange between SW ions and neutral H. Two electron fluids with different temperature are implemented to mimic the SW and ionospheric plasma. This model is an adapted version of the 3D parallel model for the Martian environment. Planetary and SW plasmas are treated separately and the dynamic of each ion species can be investigated separately. Simulations have been performed on a grid of 190×350×350 cells with a spatial resolution of Δx~120km. Acknowledgements The authors are indebted to CNES (French space agency) for the funding of their modeling activity through its program Sun - Heliosphere - Magnetosphere and to ANR (French national agency for research) for supporting</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-8772558.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-8772558.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-04-27</p> <p>Astronaut Virgil I. "Gus" Grissom, one of the original seven astronauts for <span class="hlt">Mercury</span> Project selected by NASA on April 27, 1959. The MR-4 mission, boosted by the <span class="hlt">Mercury</span>-Redstone vehicle, made the second marned suborbital flight. The capsule, Liberty Bell 7, sank into the sea after the splashdown.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-8772553.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-8772553.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1963-09-09</p> <p>Astronaut Alan B. Shepard, one of the original seven astronauts for <span class="hlt">Mercury</span> Project selected by NASA on April 27, 1959. The Freedom 7 spacecraft boosted by <span class="hlt">Mercury</span>-Redstone vehicle for the MR-3 mission made the first marned suborbital flight and Astronaut Shepard became the first American in space.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EOSTr..93Q.150B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EOSTr..93Q.150B"><span>Measuring <span class="hlt">mercury</span> in coastal fog water</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Balcerak, Ernie</p> <p>2012-04-01</p> <p><span class="hlt">Mercury</span>, a heavy metal neurotoxin, accumulates in sea life, in some cases reaching levels that make seafood unsafe for humans to eat. How <span class="hlt">mercury</span> gets into aquatic organisms is debated, but part of the pathway could include <span class="hlt">mercury</span> carried in precipitation, including rain, snow, and fog. The contribution of <span class="hlt">mercury</span> in fog water in particular is not well known, especially in foggy coastal areas such as coastal California. To learn more, Weiss-Penzias et al. measured total <span class="hlt">mercury</span> and monomethyl <span class="hlt">mercury</span> concentrations in fog water and rainwater samples taken from four locations around Monterey Bay, California, during spring and summer 2011. They found that the mean monomethyl <span class="hlt">mercury</span> concentrations in their fog water samples were about 34 times higher than the mean concentrations in their rainwater samples. Therefore, the authors believe that fog is an important, previously unrecognized source of <span class="hlt">mercury</span> to coastal ecosystems. They also explored potential sources of <span class="hlt">mercury</span>, finding that biotically formed monomethyl <span class="hlt">mercury</span> from oceanic upwelling may contribute to monomethyl <span class="hlt">mercury</span> in fog. (Geophysical Research Letters, doi:10.1029/2011GL050324, 2012)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4707050','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4707050"><span>Myoelectric <span class="hlt">control</span> system and <span class="hlt">task</span>-specific characteristics affect voluntary use of simultaneous <span class="hlt">control</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Smith, Lauren H.; Kuiken, Todd A.; Hargrove, Levi J.</p> <p>2015-01-01</p> <p>Clinically available myoelectric <span class="hlt">control</span> does not enable simultaneous proportional <span class="hlt">control</span> of prosthetic degrees of freedom. Multiple studies have proposed systems that provide simultaneous <span class="hlt">control</span>, though few have investigated whether subjects voluntarily use simultaneous <span class="hlt">control</span> or how they implement it. Additionally, few studies have explicitly evaluated the effect of providing proportional velocity <span class="hlt">control</span>. The objective of this study was to evaluate factors influencing when and how subjects use simultaneous myoelectric <span class="hlt">control</span>, including the ability to proportionally <span class="hlt">control</span> the velocity and the required <span class="hlt">task</span> precision. Five able-bodied subjects used simultaneous myoelectric <span class="hlt">control</span> systems with and without proportional velocity <span class="hlt">control</span> in a virtual Fitts’ Law <span class="hlt">task</span>. Though subjects used simultaneous <span class="hlt">control</span> to a substantial degree when proportional velocity <span class="hlt">control</span> was present, they used very little simultaneous <span class="hlt">control</span> when using constant-velocity <span class="hlt">control</span>. Furthermore, use of simultaneous <span class="hlt">control</span> varied significantly with target distance and width, reflecting a strategy of using simultaneous <span class="hlt">control</span> for gross cursor positioning and sequential <span class="hlt">control</span> for fine corrective movements. These results provide insight into how users take advantage of simultaneous <span class="hlt">control</span> and highlight the need for real-time evaluation of simultaneous <span class="hlt">control</span> algorithms, as the potential benefit of providing simultaneous <span class="hlt">control</span> may be affected by other characteristics of the myoelectric <span class="hlt">control</span> system. PMID:25769167</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED473865.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED473865.pdf"><span>Getting <span class="hlt">Mercury</span> out of Schools.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>1999</p> <p></p> <p>This guide was prepared while working with many Massachusetts schools to remove items that contain <span class="hlt">mercury</span> and to find suitable alternatives. It contains fact sheets on: <span class="hlt">mercury</span> in science laboratories and classrooms, <span class="hlt">mercury</span> in school buildings and maintenance areas, <span class="hlt">mercury</span> in the medical office and in medical technology classrooms in vocational…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2527757','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2527757"><span>A Mass Balance for <span class="hlt">Mercury</span> in the San Francisco Bay Area</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>MacLeod, Matthew; McKone, Thomas E.; Mackay, Don</p> <p>2008-01-01</p> <p>We develop and illustrate a general regional multi-species model that describes the fate and transport of <span class="hlt">mercury</span> in three forms, elemental, divalent, and methylated, in a generic regional environment including air, soil, vegetation, water and sediment. The objectives of the model are to describes the fate of the three forms of <span class="hlt">mercury</span> in the environment and determine the dominant physical sinks that remove <span class="hlt">mercury</span> from the system. Chemical transformations between the three groups of <span class="hlt">mercury</span> species are modeled by assuming constant ratios of species concentrations in individual environmental media. We illustrate and evaluate the model with an application to describe the fate and transport of <span class="hlt">mercury</span> in the San Francisco Bay Area of California. The model successfully rationalizes the identified sources with observed concentrations of total <span class="hlt">mercury</span> and methyl <span class="hlt">mercury</span> in the San Francisco Bay Estuary. The mass balance provided by the model indicates that continental and global background sources <span class="hlt">control</span> <span class="hlt">mercury</span> concentrations in the atmosphere but loadings to water in the San Francisco Bay estuary are dominated by runoff from the Central Valley catchment and re-mobilization of contaminated sediments deposited during past mining activities. The model suggests that the response time of <span class="hlt">mercury</span> concentrations in the San Francisco Bay estuary to changes in loadings is long, of the order of 50 years. PMID:16190232</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19750024910','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19750024910"><span>Substorms on <span class="hlt">Mercury</span>?</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Siscoe, G. L.; Ness, N. F.; Yeates, C. M.</p> <p>1974-01-01</p> <p>Qualitative similarities between some of the variations in the <span class="hlt">Mercury</span> encounter data and variations in the corresponding regions of the earth's magnetosphere during substorms are pointed out. The Mariner 10 data on <span class="hlt">Mercury</span> show a strong interaction between the solar wind and the plant similar to a scaled down version of that for the earth's magnetosphere. Some of the features observed in the night side <span class="hlt">Mercury</span> magnetosphere suggest time dependent processes occurring there.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19920028943&hterms=singularities&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dsingularities','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19920028943&hterms=singularities&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dsingularities"><span>Singularity-robustness and <span class="hlt">task</span>-prioritization in configuration <span class="hlt">control</span> of redundant robots</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Seraji, H.; Colbaugh, R.</p> <p>1990-01-01</p> <p>The authors present a singularity-robust <span class="hlt">task</span>-prioritized reformulation of the configuration <span class="hlt">control</span> for redundant robot manipulators. This reformation suppresses large joint velocities to induce minimal errors in the <span class="hlt">task</span> performance by modifying the <span class="hlt">task</span> trajectories. Furthermore, the same framework provides a means for assignment of priorities between the basic <span class="hlt">task</span> of end-effector motion and the user-defined additional <span class="hlt">task</span> for utilizing redundancy. This allows automatic relaxation of the additional <span class="hlt">task</span> constraints in favor of the desired end-effector motion when both cannot be achieved exactly.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10356846','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10356846"><span>Decomposition of fish samples for determination of <span class="hlt">mercury</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Prester, L; Juresa, D; Blanusa, M</p> <p>1998-12-01</p> <p>The aim of the study was to compare the efficiency of acid and alkaline decomposition of biological materials using an open and a closed system for total <span class="hlt">mercury</span> determination. Acid digestion was performed with concentrated HNO3 in tubes at 80 degrees C and lasted five hours. Alkaline digestion was performed with a <span class="hlt">45</span>% NaOH and a 1% cysteine, heated at 120 degrees C for 20 minutes. Total <span class="hlt">mercury</span> was measured by atomic absorption spectrometry using the cold vapour technique (CVAAS). The average recovery obtained for analysis of certified reference material in closed tubes for acid digested sample was superior to the alkaline one, 103 +/- 4% vs. 70 +/- 3%, respectively. In addition, the recoveries through the open system acid digestion (90 +/- 8%) and the open system alkaline digestion (57 +/- 2%) were lower than through the respective closed system digestions. Reproducibility of the acid decomposition method was superior to the alkaline one.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19960034308','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19960034308"><span>Extended <span class="hlt">Task</span> Space <span class="hlt">Control</span> for Robotic Manipulators</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Backes, Paul G. (Inventor); Long, Mark K. (Inventor)</p> <p>1996-01-01</p> <p>The invention is a method of operating a robot in successive sampling intervals to perform a <span class="hlt">task</span>, the robot having joints and joint actuators with actuator <span class="hlt">control</span> loops, by decomposing the <span class="hlt">task</span> into behavior forces, accelerations, velocities and positions of plural behaviors to be exhibited by the robot simultaneously, computing actuator accelerations of the joint actuators for the current sampling interval from both behavior forces, accelerations velocities and positions of the current sampling interval and actuator velocities and positions of the previous sampling interval, computing actuator velocities and positions of the joint actuators for the current sampling interval from the actuator velocities and positions of the previous sampling interval, and, finally, <span class="hlt">controlling</span> the actuators in accordance with the actuator accelerations, velocities and positions of the current sampling interval. The actuator accelerations, velocities and positions of the current sampling interval are stored for use during the next sampling interval.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63657&Lab=NRMRL&keyword=modified+AND+sulfur&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=63657&Lab=NRMRL&keyword=modified+AND+sulfur&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>PREPARATION AND EVALUATION OF MODIFIED LIME AND SILICA-LIME SORBENTS FOR <span class="hlt">MERCURY</span> VAPOR EMISSIONS <span class="hlt">CONTROL</span></span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The paper discusses current efforts to improve the uptake of <span class="hlt">mercury</span> species by increasing active sites and adding oxidative species to the sorbent. (NOTE: Previous work showed that <span class="hlt">mercury</span> chloride vapor is readily absorbed by calcium-based sorbents as an acid gas in environmen...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3988285','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3988285"><span>Environmental <span class="hlt">Mercury</span> and Its Toxic Effects</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Rice, Kevin M.; Walker, Ernest M.; Wu, Miaozong; Gillette, Chris</p> <p>2014-01-01</p> <p><span class="hlt">Mercury</span> exists naturally and as a man-made contaminant. The release of processed <span class="hlt">mercury</span> can lead to a progressive increase in the amount of atmospheric <span class="hlt">mercury</span>, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. <span class="hlt">Mercury</span> poisoning is the result of exposure to <span class="hlt">mercury</span> or <span class="hlt">mercury</span> compounds resulting in various toxic effects depend on its chemical form and route of exposure. The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife which have been exposed to <span class="hlt">mercury</span> through ingestion of contaminated lower organisms. MeHg toxicity is associated with nervous system damage in adults and impaired neurological development in infants and children. Ingested <span class="hlt">mercury</span> may undergo bioaccumulation leading to progressive increases in body burdens. This review addresses the systemic pathophysiology of individual organ systems associated with <span class="hlt">mercury</span> poisoning. <span class="hlt">Mercury</span> has profound cellular, cardiovascular, hematological, pulmonary, renal, immunological, neurological, endocrine, reproductive, and embryonic toxicological effects. PMID:24744824</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70015482','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70015482"><span>Preservation of samples for dissolved <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Hamlin, S.N.</p> <p>1989-01-01</p> <p>Water samples for dissolved <span class="hlt">mercury</span> requires special treatment because of the high chemical mobility and volatility of this element. Widespread use of <span class="hlt">mercury</span> and its compounds has provided many avenues for contamination of water. Two laboratory tests were done to determine the relative permeabilities of glass and plastic sample bottles to <span class="hlt">mercury</span> vapor. Plastic containers were confirmed to be quite permeable to airborne <span class="hlt">mercury</span>, glass containers were virtually impermeable. Methods of preservation include the use of various combinations of acids, oxidants, and complexing agents. The combination of nitric acid and potassium dichromate successfully preserved <span class="hlt">mercury</span> in a large variety of concentrations and dissolved forms. Because this acid-oxidant preservative acts as a sink for airborne <span class="hlt">mercury</span> and plastic containers are permeable to <span class="hlt">mercury</span> vapor, glass bottles are preferred for sample collection. To maintain a healthy work environment and minimize the potential for contamination of water samples, <span class="hlt">mercury</span> and its compounds are isolated from the atmosphere while in storage. Concurrently, a program to monitor environmental levels of <span class="hlt">mercury</span> vapor in areas of potential contamination is needed to define the extent of <span class="hlt">mercury</span> contamination and to assess the effectiveness of <span class="hlt">mercury</span> clean-up procedures.Water samples for dissolved <span class="hlt">mercury</span> require special treatment because of the high chemical mobility and volatility of this element. Widespread use of <span class="hlt">mercury</span> and its compounds has provided many avenues for contamination of water. Two laboratory tests were done to determine the relative permeabilities of glass and plastic sample bottles to <span class="hlt">mercury</span> vapor. Plastic containers were confirmed to be quite permeable to airborne <span class="hlt">mercury</span>, glass containers were virtually impermeable. Methods of preservation include the use of various combinations of acids, oxidants, and complexing agents. The combination of nitric acid and potassium dichromate successfully preserved <span class="hlt">mercury</span> in a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28484136','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28484136"><span>Surveillance of Total <span class="hlt">Mercury</span> and Methylmercury Concentrations in Retail Fish.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Watanabe, Takahiro; Hayashi, Tomoko; Matsuda, Rieko; Akiyama, Hiroshi; Teshima, Reiko</p> <p>2017-01-01</p> <p>Most fish samples contain methylmercury, that the concentrations very greatly according to the fish species. To avoid the adverse health effects of methylmercury while retaining the benefits provided by fish consumption, it is important to select suitable fish species and to <span class="hlt">control</span> the amount of the fish intake. We surveyed the concentrations of total <span class="hlt">mercury</span> and methylmercury in 210 retail fish samples classified into 19 fish species by using validated analytical methods. The results of this survey were as follows. The total <span class="hlt">mercury</span> and methylmercury concentrations were higher than 1 mg/kg in some samples of swordfish and bluefin tuna, which are large predatory fish species. In bluefin tuna and yellowtail, total <span class="hlt">mercury</span> and methylmercury concentrations in farm-raised fish were lower than those in natural fish. There was a positive correlation between total <span class="hlt">mercury</span> concentration and methylmercury concentration. Our results indicate that a cut-off value of 0.3 mg/kg total <span class="hlt">mercury</span> in the screening of fish samples would increase the effectiveness of inspection.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3127827','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3127827"><span>Assessment of Joystick <span class="hlt">control</span> during the performance of powered wheelchair driving <span class="hlt">tasks</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2011-01-01</p> <p>Background Powered wheelchairs are essential for many individuals who have mobility impairments. Nevertheless, if operated improperly, the powered wheelchair poses dangers to both the user and to those in its vicinity. Thus, operating a powered wheelchair with some degree of proficiency is important for safety, and measuring driving skills becomes an important issue to address. The objective of this study was to explore the discriminate validity of outcome measures of driving skills based on joystick <span class="hlt">control</span> strategies and performance recorded using a data logging system. Methods We compared joystick <span class="hlt">control</span> strategies and performance during standardized driving <span class="hlt">tasks</span> between a group of 10 expert and 13 novice powered wheelchair users. Driving <span class="hlt">tasks</span> were drawn from the Wheelchair Skills Test (v. 4.1). Data from the joystick <span class="hlt">controller</span> were collected on a data logging system. Joystick <span class="hlt">control</span> strategies and performance outcome measures included the mean number of joystick movements, time required to complete <span class="hlt">tasks</span>, as well as variability of joystick direction. Results In simpler <span class="hlt">tasks</span>, the expert group's driving skills were comparable to those of the novice group. Yet, in more difficult and spatially confined <span class="hlt">tasks</span>, the expert group required fewer joystick movements for <span class="hlt">task</span> completion. In some cases, experts also completed <span class="hlt">tasks</span> in approximately half the time with respect to the novice group. Conclusions The analysis of joystick <span class="hlt">control</span> made it possible to discriminate between novice and expert powered wheelchair users in a variety of driving <span class="hlt">tasks</span>. These results imply that in spatially confined areas, a greater powered wheelchair driving skill level is required to complete <span class="hlt">tasks</span> efficiently. Based on these findings, it would appear that the use of joystick signal analysis constitutes an objective tool for the measurement of powered wheelchair driving skills. This tool may be useful for the clinical assessment and training of powered wheelchair skills. PMID</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-9801802.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-9801802.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1961-03-24</p> <p>The <span class="hlt">Mercury</span>-Redstone Booster Development vehicle (MR-BD) lifts off from Cape Canaveral March 24, 1961. This test flight evaluated changes incorporated in the booster designed to reduce vehicle oscillations and vibrations. The <span class="hlt">Mercury</span>-Redstone launch vehicle was developed by Dr. Wernher von Braun and the rocket team in Huntsville, Alabama.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-8892072.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-8892072.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-04-27</p> <p>Astronaut Walter M. "Wally" Schirra, one of the original seven astronauts for <span class="hlt">Mercury</span> Project selected by NASA on April 27, 1959. The MA-8 (<span class="hlt">Mercury</span>-Atlas) mission with Sigma 7 spacecraft was the third marned orbital flight by the United States, and made the six orbits in 9-1/4 hours.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=jennifer+AND+craik&id=EJ750919','ERIC'); return false;" href="https://eric.ed.gov/?q=jennifer+AND+craik&id=EJ750919"><span>Executive <span class="hlt">Control</span> in a Modified Antisaccade <span class="hlt">Task</span>: Effects of Aging and Bilingualism</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bialystok, Ellen; Craik, Fergus I. M.; Ryan, Jennifer</p> <p>2006-01-01</p> <p>Two studies are reported that assess differences associated with aging and bilingualism in an executive <span class="hlt">control</span> <span class="hlt">task</span>. Previous work has suggested that bilinguals have an advantage over monolinguals in nonlinguistic <span class="hlt">tasks</span> involving executive <span class="hlt">control</span>; the major purpose of the present article is to ascertain which aspects of <span class="hlt">control</span> are sensitive…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19407194','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19407194"><span>MESSENGER observations of magnetic reconnection in <span class="hlt">Mercury</span>'s magnetosphere.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Slavin, James A; Acuña, Mario H; Anderson, Brian J; Baker, Daniel N; Benna, Mehdi; Boardsen, Scott A; Gloeckler, George; Gold, Robert E; Ho, George C; Korth, Haje; Krimigis, Stamatios M; McNutt, Ralph L; Raines, Jim M; Sarantos, Menelaos; Schriver, David; Solomon, Sean C; Trávnícek, Pavel; Zurbuchen, Thomas H</p> <p>2009-05-01</p> <p>Solar wind energy transfer to planetary magnetospheres and ionospheres is <span class="hlt">controlled</span> by magnetic reconnection, a process that determines the degree of connectivity between the interplanetary magnetic field (IMF) and a planet's magnetic field. During MESSENGER's second flyby of <span class="hlt">Mercury</span>, a steady southward IMF was observed and the magnetopause was threaded by a strong magnetic field, indicating a reconnection rate ~10 times that typical at Earth. Moreover, a large flux transfer event was observed in the magnetosheath, and a plasmoid and multiple traveling compression regions were observed in <span class="hlt">Mercury</span>'s magnetotail, all products of reconnection. These observations indicate that <span class="hlt">Mercury</span>'s magnetosphere is much more responsive to IMF direction and dominated by the effects of reconnection than that of Earth or the other magnetized planets.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016IJAME..21..547G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016IJAME..21..547G"><span>Robust <span class="hlt">Task</span> Space Trajectory Tracking <span class="hlt">Control</span> of Robotic Manipulators</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Galicki, M.</p> <p>2016-08-01</p> <p>This work deals with the problem of the accurate <span class="hlt">task</span> space trajectory tracking subject to finite-time convergence. Kinematic and dynamic equations of a redundant manipulator are assumed to be uncertain. Moreover, globally unbounded disturbances are allowed to act on the manipulator when tracking the trajectory by the end-effector. Furthermore, the movement is to be accomplished in such a way as to reduce both the manipulator torques and their oscillations thus eliminating the potential robot vibrations. Based on suitably defined <span class="hlt">task</span> space non-singular terminal sliding vector variable and the Lyapunov stability theory, we propose a class of chattering-free robust <span class="hlt">controllers</span>, based on the estimation of transpose Jacobian, which seem to be effective in counteracting both uncertain kinematics and dynamics, unbounded disturbances and (possible) kinematic and/or algorithmic singularities met on the robot trajectory. The numerical simulations carried out for a redundant manipulator of a SCARA type consisting of the three revolute kinematic pairs and operating in a two-dimensional <span class="hlt">task</span> space, illustrate performance of the proposed <span class="hlt">controllers</span> as well as comparisons with other well known <span class="hlt">control</span> schemes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20060013125','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20060013125"><span>MESSENGER: Exploring <span class="hlt">Mercury</span>'s Magnetosphere</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Slavin, James A.; Krimigis, Stamatios M.; Acuna, Mario H.; Anderson, Brian J.; Baker, Daniel N.; Koehn, Patrick L.; Korth, Haje; Levi, Stefano; Mauk, Barry H.; Solomon, Sean C.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20060013125'); toggleEditAbsImage('author_20060013125_show'); toggleEditAbsImage('author_20060013125_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20060013125_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20060013125_hide"></p> <p>2005-01-01</p> <p>The MESSENGER mission to <span class="hlt">Mercury</span> offers our first opportunity to explore this planet s miniature magnetosphere since the brief flybys of Mariner 10. <span class="hlt">Mercury</span> s magnetosphere is unique in many respects. The magnetosphere of <span class="hlt">Mercury</span> is among the smallest in the solar system; its magnetic field typically stands off the solar wind only - 1000 to 2000 km above the surface. For this reason there are no closed drift paths for energetic particles and, hence, no radiation belts. The characteristic time scales for wave propagation and convective transport are short and kinetic and fluid modes may be coupled. Magnetic reconnection at the dayside magnetopause may erode the subsolar magnetosphere allowing solar wind ions to impact directly the regolith. Inductive currents in <span class="hlt">Mercury</span> s interior may act to modify the solar wind interaction by resisting changes due to solar wind pressure variations. Indeed, observations of these induction effects may be an important source of information on the state of <span class="hlt">Mercury</span> s interior. In addition, <span class="hlt">Mercury</span> s magnetosphere is the only one with its defining magnetic flux tubes rooted in a planetary regolith as opposed to an atmosphere with a conductive ionospheric layer. This lack of an ionosphere is probably the underlying reason for the brevity of the very intense, but short-lived, - 1-2 min, substorm-like energetic particle events observed by Mariner 10 during its first traversal of <span class="hlt">Mercury</span> s magnetic tail. Because of <span class="hlt">Mercury</span> s proximity to the sun, 0.3 - 0.5 AU, this magnetosphere experiences the most extreme driving forces in the solar system. All of these factors are expected to produce complicated interactions involving the exchange and re-cycling of neutrals and ions between the solar wind, magnetosphere, and regolith. The electrodynamics of <span class="hlt">Mercury</span> s magnetosphere are expected to be equally complex, with strong forcing by the solar wind, magnetic reconnection at the magnetopause and in the tail, and the pick-up of planetary ions all</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26247328','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26247328"><span><span class="hlt">Mercury</span> in <span class="hlt">mercury</span>(II)-spiked soils is highly susceptible to plant bioaccumulation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hlodák, Michal; Urík, Martin; Matúš, Peter; Kořenková, Lucia</p> <p>2016-01-01</p> <p>Heavy metal phytotoxicity assessments usually use soluble metal compounds in spiked soils to evaluate metal bioaccumulation, growth inhibition and adverse effects on physiological parameters. However, exampling <span class="hlt">mercury</span> phytotoxicity for barley (Hordeum vulgare) this paper highlights unsuitability of this experimental approach. <span class="hlt">Mercury</span>(II) in spiked soils is extremely bioavailable, and there experimentally determined bioaccumulation is significantly higher compared to reported <span class="hlt">mercury</span> bioaccumulation efficiency from soils collected from <span class="hlt">mercury</span>-polluted areas. Our results indicate this is not affected by soil sorption capacity, thus soil ageing and formation of more stable mercuric complexes with soil fractions is necessary for reasonable metal phytotoxicity assessments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25257710','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25257710"><span>Stroop proactive <span class="hlt">control</span> and <span class="hlt">task</span> conflict are modulated by concurrent working memory load.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kalanthroff, Eyal; Avnit, Amir; Henik, Avishai; Davelaar, Eddy J; Usher, Marius</p> <p>2015-06-01</p> <p>Performance on the Stroop <span class="hlt">task</span> reflects two types of conflict-informational (between the incongruent word and font color) and <span class="hlt">task</span> (between the contextually relevant color-naming <span class="hlt">task</span> and the irrelevant, but automatic, word-reading <span class="hlt">task</span>). According to the dual mechanisms of <span class="hlt">control</span> theory (DMC; Braver, 2012), variability in Stroop performance can result from variability in the deployment of a proactive <span class="hlt">task</span>-demand <span class="hlt">control</span> mechanism. Previous research has shown that when proactive <span class="hlt">control</span> (PC) is diminished, both increased Stroop interference and a reversed Stroop facilitation (RF) are observed. Although the current DMC model accounts for the former effect, it does not predict the observed RF, which is considered to be behavioral evidence for <span class="hlt">task</span> conflict in the Stroop <span class="hlt">task</span>. Here we expanded the DMC model to account for Stroop RF. Assuming that a concurrent working memory (WM) <span class="hlt">task</span> reduces PC, we predicted both increased interference and an RF. Nineteen participants performed a standard Stroop <span class="hlt">task</span> combined with a concurrent n-back <span class="hlt">task</span>, which was aimed at reducing available WM resources, and thus overloading PC. Although the results indicated common Stroop interference and facilitation in the low-load condition (zero-back), in the high-load condition (two-back), both increased Stroop interference and RF were observed, consistent with the model's prediction. These findings indicate that PC is modulated by concurrent WM load and serves as a common <span class="hlt">control</span> mechanism for both informational and <span class="hlt">task</span> Stroop conflicts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24552960','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24552960"><span><span class="hlt">Mercury</span> poisoning dentistry: high-level indoor air <span class="hlt">mercury</span> contamination at selected dental sites.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Khwaja, Mahmood A; Abbasi, Maryam Shabbir</p> <p>2014-01-01</p> <p><span class="hlt">Mercury</span> (Hg), also known as quick silver, is an essential constituent of dental amalgam. It is a toxic substance of global concern. Children are more at risk from <span class="hlt">mercury</span> poisoning which affects their neurological development and brain. In the past, a number of studies at dental sites in many countries have been carried out and reported. The present report briefly describes and discusses our recent investigations carried out at 34 dental sites (teaching institutions, hospitals and private clinics) in Pakistan. It is evident from the data that at many sites the indoor <span class="hlt">mercury</span> vapor levels exceed far above the permissible limit recommended for safe physical and mental health. At these sites, public in general and the medical, paramedical staff and vulnerable population in particular, are at most serious risk to health resulting from exposure to toxic and hazardous <span class="hlt">mercury</span>. To minimize such risk, some of the recommendations are, best in-house environmental practices for occupational health and safety, <span class="hlt">mercury</span> contaminated waste reduction at source, <span class="hlt">mercury</span> specific legislation and ratification of Minamata convention on <span class="hlt">mercury</span> by Pakistan and other world governments at the earliest time possible.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16967827','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16967827"><span><span class="hlt">Mercury</span> reduction in Munhena, Mozambique: homemade solutions and the social context for change.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Spiegel, Samuel J; Savornin, Olivier; Shoko, Dennis; Veiga, Marcello M</p> <p>2006-01-01</p> <p>The health and environmental impacts of artisanal gold mining are of growing concern in Munhena, Mozambique, where more than 12,000 people are involved in such activities. Gold is extracted using <span class="hlt">mercury</span> amalgamation, posing a considerable threat to human and environmental health. A pilot project ascertained the feasibility of reducing <span class="hlt">mercury</span> use and emissions by promoting <span class="hlt">control</span> measures utilizing local resources. Retorts were fabricated with local materials. Training workshops introduced the homemade retorts, and a portable <span class="hlt">mercury</span> monitor revealed effective <span class="hlt">mercury</span> reduction. Barriers to widespread technology adoption include poverty, lack of knowledge and trust, and the free supply of <span class="hlt">mercury</span> from private gold buyers. Homemade retorts are inexpensive and effective, and miners could benefit by building community amalgamation centers. The government could play a greater role in gold purchasing to reduce <span class="hlt">mercury</span> pollution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21863739','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21863739"><span>[<span class="hlt">Mercury</span> (and...) through the centuries].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kłys, Małgorzata</p> <p>2010-01-01</p> <p><span class="hlt">Mercury</span> has a long history, fascinating in its many aspects. Through the centuries--from ancient times to the present day--the metal in its various forms, also known under the name "quicksilver", accompanied the man and was used for diversified purposes. Today, <span class="hlt">mercury</span> is employed in manufacturing thermometers, barometers, vacuum pumps and explosives. It is also used in silver and gold mining processes. <span class="hlt">Mercury</span> compounds play a significant role in dentistry, pharmaceutical industry and crop protection. The contemporary use of <span class="hlt">mercury</span> markedly decreases, but historically speaking, the archives abound in materials that document facts and events occurring over generations and the immense intellectual effort aiming at discovering the true properties and mechanisms of <span class="hlt">mercury</span> activity. <span class="hlt">Mercury</span> toxicity, manifested in destruction of biological membranes and binding of the element with proteins, what disturbs biochemical processes occurring in the body, was discovered only after many centuries of the metal exerting its effect on the lives of individuals and communities. For centuries, <span class="hlt">mercury</span> was present in the work of alchemists, who searched for the universal essence or quintessence and the so-called philosopher's stone. In the early modern era, between the 16th and 19th centuries, <span class="hlt">mercury</span> was used to manufacture mirrors. <span class="hlt">Mercury</span> compounds were employed as a medication against syphilis, which plagued mankind for more than four hundred years--from the Middle Ages till mid 20th century, when the discovery of penicillin became the turning point. This extremely toxic therapy resulted in much suffering, individual tragedies, chronic poisonings leading to fatalities and dramatic sudden deaths. In the last fifty years, there even occurred attempts of mentally imbalanced individuals at injecting themselves with metallic <span class="hlt">mercury</span>, also as a performance-enhancing drug. Instances of mass <span class="hlt">mercury</span> poisoning occurred many times in the past in consequence of eating food products</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=69736&keyword=sharma&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=69736&keyword=sharma&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>CATALYTIC EFFECTS OF CARBON SORBENTS FOR <span class="hlt">MERCURY</span> CAPTURE. (R827649C001)</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p><p>Activated carbon sorbents have the potential to be an effective means of <span class="hlt">mercury</span> <span class="hlt">control</span> in combustion systems. Reactions of activated carbons in flow systems with <span class="hlt">mercury</span> and gas stream components were investigated to determine the types of chemical interactions that occur on...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022005','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022005"><span>Occurrence and transport of total <span class="hlt">mercury</span> and methyl <span class="hlt">mercury</span> in the Sacramento River Basin, California</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Domagalski, Joseph L.</p> <p>1999-01-01</p> <p><span class="hlt">Mercury</span> poses a water-quality problem for California's Sacramento River, a large river with a mean annual discharge of over 650 m3/s. This river discharges into the San Francisco Bay, and numerous fish species of the bay and river contain <span class="hlt">mercury</span> levels high enough to affect human health if consumed. Two possible sources of <span class="hlt">mercury</span> are the <span class="hlt">mercury</span> mines in the Coast Ranges and the gold mines in the Sierra Nevada. <span class="hlt">Mercury</span> was once mined in the Coast Ranges, west of the Sacramento River, and used to process gold in the Sierra Nevada, east of the river. The mineralogy of the Coast Ranges <span class="hlt">mercury</span> deposits is mainly cinnabar (HgS), but elemental <span class="hlt">mercury</span> was used to process gold in the Sierra Nevada. Residual <span class="hlt">mercury</span> from mineral processing in the Sierra Nevada is mainly in elemental form or in association with oxide particles or organic matter and is biologically available. Recent bed-sediment sampling, at sites below large reservoirs, showed elevated levels of total <span class="hlt">mercury</span> (median concentration 0.28 ??g/g) in every large river (the Feather, Yuba, Bear, and American rivers) draining the Sierra Nevada gold region. Monthly sampling for <span class="hlt">mercury</span> in unfiltered water shows relatively low concentrations during the nonrainy season in samples collected throughout the Sacramento River Basin, but significantly higher concentrations following storm-water runoff. Measured concentrations, following storm-water runoff, frequently exceeded the state of California standards for the protection of aquatic life. Results from the first year of a 2-year program of sampling for methyl <span class="hlt">mercury</span> in unfiltered water showed similar median concentrations (0.1 ng/l) at all sampling locations, but with apparent high seasonal concentrations measured during autumn and winter. Methyl <span class="hlt">mercury</span> concentrations were not significantly higher in rice field runoff water, even though rice production involves the creation of seasonal wetlands: higher rates of methylation are known to occur in stagnant wetland</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://onlinelibrary.wiley.com/doi/10.1897/09-060.1/abstract','USGSPUBS'); return false;" href="http://onlinelibrary.wiley.com/doi/10.1897/09-060.1/abstract"><span>Rapid increases in <span class="hlt">mercury</span> concentrations in the eggs of mallards fed methylmercury</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Heinz, Gary H.; Hoffman, David J.; Klimstra, Jon D.; Stebbins, Katherine R.</p> <p>2009-01-01</p> <p>To determine how quickly breeding birds would have to feed in a <span class="hlt">mercury</span>-contaminated area before harmful concentrations of <span class="hlt">mercury</span>, as methylmercury, built up in their eggs, we fed female mallards (Anas platyrhynchos) a <span class="hlt">control</span> diet or diets containing 0.5, 1, 2, 4, or 8 μg/g <span class="hlt">mercury</span> (on what was close to a dry weight basis) as methylmercury chloride for 23 d. After 18 d on their respective <span class="hlt">mercury</span> diets, the eggs of mallards fed 0.5, 1, 2, 4, or 8 μg/g <span class="hlt">mercury</span> contained 97.8, 86.0, 89.9, 88.9, and 85.9%, respectively, of the peak concentrations reached after 23 d. Depending on the dietary concentration of <span class="hlt">mercury</span>, no more than approximately a week may be required for harmful concentrations (0.5–0.8 μg/g, wet weight) to be excreted into eggs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=198385&Lab=NRMRL&keyword=food+AND+contamination&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=198385&Lab=NRMRL&keyword=food+AND+contamination&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>GEOCHEMICAL FACTORS GOVERNING METHYL <span class="hlt">MERCURY</span> PRODUCTION IN <span class="hlt">MERCURY</span> CONTAMINATED SEDIMENTS</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Bench scale experiments were conducted to improve our understanding of aquatic <span class="hlt">mercury</span> transformation processes (biotic and abiotic), specifically those factors which govern the production of methyl <span class="hlt">mercury</span> (MeHg) in sedimentary environments. The greatest cause for concern regar...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19850006244&hterms=money+strategy&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dmoney%2Bstrategy','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19850006244&hterms=money+strategy&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dmoney%2Bstrategy"><span>Manual-<span class="hlt">control</span> Analysis Applied to the Money-supply <span class="hlt">Control</span> <span class="hlt">Task</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Wingrove, R. C.</p> <p>1984-01-01</p> <p>The recent procedure implemented by the Federal Reserve Board to <span class="hlt">control</span> the money supply is formulated in the form of a tracking model as used in the study of manual-<span class="hlt">control</span> <span class="hlt">tasks</span>. Using this model, an analysis is made to determine the effect of monetary <span class="hlt">control</span> on the fluctuations in economic output. The results indicate that monetary <span class="hlt">control</span> can reduce the amplitude of fluctuations at frequencies near the region of historic business cycles. However, with significant time lags in the <span class="hlt">control</span> loop, monetary <span class="hlt">control</span> tends to increase the amplitude of the fluctuations at the higher frequencies. How the investigator or student can use the tools developed in the field of manual-<span class="hlt">control</span> analysis to study the nature of economic fluctuations and to examine different strategies for stabilization is examined.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23858994','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23858994"><span>Testing and modeling the influence of reclamation and <span class="hlt">control</span> methods for reducing nonpoint <span class="hlt">mercury</span> emissions associated with industrial open pit gold mines.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Miller, Matthieu B; Gustin, Mae S</p> <p>2013-06-01</p> <p>Industrial gold mining is a significant source of <span class="hlt">mercury</span> (Hg) emission to the atmosphere. To investigate ways to reduce these emissions, reclamation and dust and <span class="hlt">mercury</span> <span class="hlt">control</span> methods used at open pit gold mining operations in Nevada were studied in a laboratory setting. Using this information along with field data, and building off previous work, total annual Hg emissions were estimated for two active gold mines in northern Nevada. Results showed that capping mining waste materials with a low-Hg substrate can reduce Hg emissions from 50 to nearly 100%. The spraying of typical dust <span class="hlt">control</span> solutions often results in higher Hg emissions, especially as materials dry after application. The concentrated application of a dithiocarbamate Hg <span class="hlt">control</span> reagent appears to reduce Hg emissions, but further testing mimicking the actual distribution of this chemical within an active leach solution is needed to make a more definitive assessment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-8772554.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-8772554.html"><span><span class="hlt">Mercury</span> Project</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>1959-04-27</p> <p>Astronaut John H. Glenn, one of the original seven astronauts for <span class="hlt">Mercury</span> Project selected by NASA on April 27, 1959. The MA-6 mission, boosted by the <span class="hlt">Mercury</span>-Atlas vehicle, was the first manned orbital launch by the United States, and carried Astronaut Glenn aboard the Friendship 7 spacecraft to orbit the Earth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26613607','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26613607"><span>Locus ceruleus neurons in people with autism contain no histochemically-detectable <span class="hlt">mercury</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pamphlett, Roger; Kum Jew, Stephen</p> <p>2016-02-01</p> <p>Exposure to environmental <span class="hlt">mercury</span> has been proposed to play a part in autism. <span class="hlt">Mercury</span> is selectively taken up by the human locus ceruleus, a region of the brain that has been implicated in autism. We therefore looked for the presence of <span class="hlt">mercury</span> in the locus ceruleus of people who had autism, using the histochemical technique of autometallography which can detect nanogram amounts of <span class="hlt">mercury</span> in tissues. In addition, we sought evidence of damage to locus ceruleus neurons in autism by immunostaining for hyperphosphorylated tau. No <span class="hlt">mercury</span> was found in any neurons of the locus ceruleus of 6 individuals with autism (5 male, 1 female, age range 16-48 years). <span class="hlt">Mercury</span> was present in locus ceruleus neurons in 7 of 11 (64%) age-matched <span class="hlt">control</span> individuals who did not have autism, which is significantly more than in individuals with autism. No increase in numbers of locus ceruleus neurons containing hyperphosphorylated tau was detected in people with autism. In conclusion, most people with autism have not been exposed early in life to quantities of <span class="hlt">mercury</span> large enough to be found later in adult locus ceruleus neurons. Human locus ceruleus neurons are sensitive indicators of <span class="hlt">mercury</span> exposure, and <span class="hlt">mercury</span> appears to remain in these neurons indefinitely, so these findings do not support the hypothesis that <span class="hlt">mercury</span> neurotoxicity plays a role in autism.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2018EUCAS..10..265S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2018EUCAS..10..265S"><span>AOCS operations preparation for the BepiColombo mission to <span class="hlt">mercury</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Steiger, C.; Altay, A.; Montagnon, E.; Companys, V.</p> <p>2018-06-01</p> <p>The 2018 ESA/JAXA BepiColombo mission to <span class="hlt">Mercury</span> features a complex modular design, with two scientific <span class="hlt">Mercury</span> orbiters and a cruise module. The spacecraft (S/C) and mission design lead to a number of challenges for the attitude and orbit <span class="hlt">control</span> system (AOCS), including electric propulsion usage during cruise to <span class="hlt">Mercury</span>, AOCS capability to deal with several S/C configurations, and strict attitude constraints owing to the harsh thermal environment. This paper presents the activities for AOCS operations preparation by ESA/ESOC, covering the current preparation status as well as an outlook on upcoming activities before launch.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/29867340','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/29867340"><span>Exposure to Inorganic <span class="hlt">Mercury</span> Causes Oxidative Stress, Cell Death, and Functional Deficits in the Motor Cortex.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Teixeira, Francisco B; de Oliveira, Ana C A; Leão, Luana K R; Fagundes, Nathália C F; Fernandes, Rafael M; Fernandes, Luanna M P; da Silva, Márcia C F; Amado, Lilian L; Sagica, Fernanda E S; de Oliveira, Edivaldo H C; Crespo-Lopez, Maria E; Maia, Cristiane S F; Lima, Rafael R</p> <p>2018-01-01</p> <p><span class="hlt">Mercury</span> is a toxic metal that can be found in the environment in three different forms - elemental, organic and inorganic. Inorganic <span class="hlt">mercury</span> has a lower liposolubility, which results in a lower organism absorption and reduced passage through the blood-brain barrier. For this reason, exposure models that use inorganic <span class="hlt">mercury</span> in rats in order to evaluate its effects on the central nervous system are rare, especially in adult subjects. This study investigated if a chronic exposure to low doses of <span class="hlt">mercury</span> chloride (HgCl2), an inorganic form of <span class="hlt">mercury</span>, is capable of promoting motor alterations and neurodegenerative in the motor cortex of adult rats. Forty animals were exposed to a dose of 0.375 mg/kg/day, for <span class="hlt">45</span> days. They were then submitted to motor evaluation and euthanized to collect the motor cortex. Measurement of <span class="hlt">mercury</span> deposited in the brain parenchyma, evaluation of oxidative balance, quantification of cellular cytotoxicity and apoptosis and density of mature neurons and astrocytes of the motor cortex were performed. It was observed that chronic exposure to inorganic <span class="hlt">mercury</span> caused a decrease in balance and fine motor coordination, formation of <span class="hlt">mercury</span> deposits and oxidative stress verified by the increase of lipoperoxidation and nitrite concentration and a decrease of the total antioxidant capacity. In addition, we found that this model of exposure to inorganic <span class="hlt">mercury</span> caused cell death by cytotoxicity and induction of apoptosis with a decreased number of neurons and astrocytes in the motor cortex. Our results provide evidence that exposure to inorganic <span class="hlt">mercury</span> in low doses, even in spite of its poor ability to cross biological barriers, is still capable of inducing motor deficits, cell death by cytotoxicity and apoptosis, and oxidative stress in the motor cortex of adult rats.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5962769','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5962769"><span>Exposure to Inorganic <span class="hlt">Mercury</span> Causes Oxidative Stress, Cell Death, and Functional Deficits in the Motor Cortex</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Teixeira, Francisco B.; de Oliveira, Ana C. A.; Leão, Luana K. R.; Fagundes, Nathália C. F.; Fernandes, Rafael M.; Fernandes, Luanna M. P.; da Silva, Márcia C. F.; Amado, Lilian L.; Sagica, Fernanda E. S.; de Oliveira, Edivaldo H. C.; Crespo-Lopez, Maria E.; Maia, Cristiane S. F.; Lima, Rafael R.</p> <p>2018-01-01</p> <p><span class="hlt">Mercury</span> is a toxic metal that can be found in the environment in three different forms – elemental, organic and inorganic. Inorganic <span class="hlt">mercury</span> has a lower liposolubility, which results in a lower organism absorption and reduced passage through the blood–brain barrier. For this reason, exposure models that use inorganic <span class="hlt">mercury</span> in rats in order to evaluate its effects on the central nervous system are rare, especially in adult subjects. This study investigated if a chronic exposure to low doses of <span class="hlt">mercury</span> chloride (HgCl2), an inorganic form of <span class="hlt">mercury</span>, is capable of promoting motor alterations and neurodegenerative in the motor cortex of adult rats. Forty animals were exposed to a dose of 0.375 mg/kg/day, for <span class="hlt">45</span> days. They were then submitted to motor evaluation and euthanized to collect the motor cortex. Measurement of <span class="hlt">mercury</span> deposited in the brain parenchyma, evaluation of oxidative balance, quantification of cellular cytotoxicity and apoptosis and density of mature neurons and astrocytes of the motor cortex were performed. It was observed that chronic exposure to inorganic <span class="hlt">mercury</span> caused a decrease in balance and fine motor coordination, formation of <span class="hlt">mercury</span> deposits and oxidative stress verified by the increase of lipoperoxidation and nitrite concentration and a decrease of the total antioxidant capacity. In addition, we found that this model of exposure to inorganic <span class="hlt">mercury</span> caused cell death by cytotoxicity and induction of apoptosis with a decreased number of neurons and astrocytes in the motor cortex. Our results provide evidence that exposure to inorganic <span class="hlt">mercury</span> in low doses, even in spite of its poor ability to cross biological barriers, is still capable of inducing motor deficits, cell death by cytotoxicity and apoptosis, and oxidative stress in the motor cortex of adult rats. PMID:29867340</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4352902','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4352902"><span>Increased <span class="hlt">Mercury</span> Levels in Patients with Celiac Disease following a Gluten-Free Regimen</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Elli, Luca; Rossi, Valentina; Conte, Dario; Ronchi, Anna; Tomba, Carolina; Passoni, Manuela; Bardella, Maria Teresa; Roncoroni, Leda; Guzzi, Gianpaolo</p> <p>2015-01-01</p> <p>Background and Aim. Although <span class="hlt">mercury</span> is involved in several immunological diseases, nothing is known about its implication in celiac disease. Our aim was to evaluate blood and urinary levels of <span class="hlt">mercury</span> in celiac patients. Methods. We prospectively enrolled 30 celiac patients (20 treated with normal duodenal mucosa and 10 untreated with duodenal atrophy) and 20 healthy <span class="hlt">controls</span> from the same geographic area. Blood and urinary <span class="hlt">mercury</span> concentrations were measured by means of flow injection inductively coupled plasma mass spectrometry. Enrolled patients underwent dental chart for amalgam fillings and completed a food-frequency questionnaire to evaluate diet and fish intake. Results. <span class="hlt">Mercury</span> blood/urinary levels were 2.4 ± 2.3/1.0 ± 1.4, 10.2 ± 6.7/2.2 ± 3.0 and 3.7 ± 2.7/1.3 ± 1.2 in untreated CD, treated CD, and healthy <span class="hlt">controls</span>, respectively. Resulting <span class="hlt">mercury</span> levels were significantly higher in celiac patients following a gluten-free diet. No differences were found regarding fish intake and number of amalgam fillings. No demographic or clinical data were significantly associated with <span class="hlt">mercury</span> levels in biologic samples. Conclusion. Data demonstrate a fourfold increase of <span class="hlt">mercury</span> blood levels in celiac patients following a gluten-free diet. Further studies are needed to clarify its role in celiac mechanism. PMID:25802516</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940019726','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940019726"><span>Speech versus manual <span class="hlt">control</span> of camera functions during a telerobotic <span class="hlt">task</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bierschwale, John M.; Sampaio, Carlos E.; Stuart, Mark A.; Smith, Randy L.</p> <p>1993-01-01</p> <p>This investigation has evaluated the voice-commanded camera <span class="hlt">control</span> concept. For this particular <span class="hlt">task</span>, total voice <span class="hlt">control</span> of continuous and discrete camera functions was significantly slower than manual <span class="hlt">control</span>. There was no significant difference between voice and manual input for several types of errors. There was not a clear trend in subjective preference of camera command input modality. <span class="hlt">Task</span> performance, in terms of both accuracy and speed, was very similar across both levels of experience.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.er.usgs.gov/publication/70022301','USGSPUBS'); return false;" href="https://pubs.er.usgs.gov/publication/70022301"><span>The southwestern alaska <span class="hlt">mercury</span> belt and its relationship to the circum-pacific metallogenic <span class="hlt">mercury</span> province</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Gray, J.E.; Gent, C.A.; Snee, L.W.</p> <p>2000-01-01</p> <p>A belt of small but numerous <span class="hlt">mercury</span> deposits extends for about 500 km in the Kuskokwim River region of southwestern Alaska. The southwestern Alaska <span class="hlt">mercury</span> belt is part of widespread <span class="hlt">mercury</span> deposits of the circumPacific region that are similar to other <span class="hlt">mercury</span> deposits throughout the world because they are epithermal with formation temperatures of about 200??C, the ore is dominantly cinnabar with Hg-Sb-As??Au geochemistry, and mineralized forms include vein, vein breccias, stockworks, replacements, and disseminations. The southwestern Alaska <span class="hlt">mercury</span> belt has produced about 1,400 t of <span class="hlt">mercury</span>, which is small on an international scale. However, additional <span class="hlt">mercury</span> deposits are likely to be discovered because the terrain is topographically low with significant vegetation cover. Anomalous concentrations of gold in cinnabar ore suggest that gold deposits are possible in higher temperature environments below some of the Alaska <span class="hlt">mercury</span> deposits. We correlate mineralization of the southwestern Alaska <span class="hlt">mercury</span> deposits with Late Cretaceous and early Tertiary igneous activity. Our 40Ar/39Ar ages of 70??3 Ma from hydrothermal sericites in the <span class="hlt">mercury</span> deposits indicate a temporal association of igneous activity and mineralization. Furthermore, we suggest that our geological and geochemical data from the <span class="hlt">mercury</span> deposits indicate that ore fluids were generated primarily in surrounding sedimentary wall rocks when they were cut by Late Cretaceous and early Tertiary intrusions. In our ore genesis model, igneous activity provided the heat to initiate dehydration reactions and expel fluids from hydrous minerals and formational waters in the surrounding sedimentary wall rocks, causing thermal convection and hydrothermal fluid flow through permeable rocks and along fractures and faults. Our isotopic data from sulfide and alteration minerals of the <span class="hlt">mercury</span> deposits indicate that ore fluids were derived from multiple sources, with most ore fluids originating from the sedimentary wall</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.epa.gov/mercury','PESTICIDES'); return false;" href="https://www.epa.gov/mercury"><span><span class="hlt">Mercury</span> in Your Environment</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>Basic information about <span class="hlt">mercury</span>, how it gets in the air, how people are exposed to it and health effects associated with exposure; what EPA and other organizations are doing to limit exposures; what citizens should know to minimize exposures and to reduce <span class="hlt">mercury</span> in the environment; and information about products that contain <span class="hlt">mercury</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title33-vol3/pdf/CFR-2010-title33-vol3-sec203-45.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title33-vol3/pdf/CFR-2010-title33-vol3-sec203-45.pdf"><span>33 CFR 203.<span class="hlt">45</span> - Rehabilitation of Federal flood <span class="hlt">control</span> works.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Rehabilitation of Federal flood <span class="hlt">control</span> works. 203.<span class="hlt">45</span> Section 203.<span class="hlt">45</span> Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE EMERGENCY EMPLOYMENT OF ARMY AND OTHER RESOURCES, NATURAL DISASTER...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title33-vol3/pdf/CFR-2013-title33-vol3-sec203-45.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title33-vol3/pdf/CFR-2013-title33-vol3-sec203-45.pdf"><span>33 CFR 203.<span class="hlt">45</span> - Rehabilitation of Federal flood <span class="hlt">control</span> works.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-07-01</p> <p>... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Rehabilitation of Federal flood <span class="hlt">control</span> works. 203.<span class="hlt">45</span> Section 203.<span class="hlt">45</span> Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE EMERGENCY EMPLOYMENT OF ARMY AND OTHER RESOURCES, NATURAL DISASTER...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title33-vol3/pdf/CFR-2011-title33-vol3-sec203-45.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title33-vol3/pdf/CFR-2011-title33-vol3-sec203-45.pdf"><span>33 CFR 203.<span class="hlt">45</span> - Rehabilitation of Federal flood <span class="hlt">control</span> works.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Rehabilitation of Federal flood <span class="hlt">control</span> works. 203.<span class="hlt">45</span> Section 203.<span class="hlt">45</span> Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE EMERGENCY EMPLOYMENT OF ARMY AND OTHER RESOURCES, NATURAL DISASTER...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title33-vol3/pdf/CFR-2012-title33-vol3-sec203-45.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title33-vol3/pdf/CFR-2012-title33-vol3-sec203-45.pdf"><span>33 CFR 203.<span class="hlt">45</span> - Rehabilitation of Federal flood <span class="hlt">control</span> works.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Rehabilitation of Federal flood <span class="hlt">control</span> works. 203.<span class="hlt">45</span> Section 203.<span class="hlt">45</span> Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE EMERGENCY EMPLOYMENT OF ARMY AND OTHER RESOURCES, NATURAL DISASTER...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title33-vol3/pdf/CFR-2014-title33-vol3-sec203-45.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title33-vol3/pdf/CFR-2014-title33-vol3-sec203-45.pdf"><span>33 CFR 203.<span class="hlt">45</span> - Rehabilitation of Federal flood <span class="hlt">control</span> works.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-07-01</p> <p>... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Rehabilitation of Federal flood <span class="hlt">control</span> works. 203.<span class="hlt">45</span> Section 203.<span class="hlt">45</span> Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE EMERGENCY EMPLOYMENT OF ARMY AND OTHER RESOURCES, NATURAL DISASTER...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=80525&Lab=NHEERL&keyword=common+AND+good&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=80525&Lab=NHEERL&keyword=common+AND+good&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>TISSUE <span class="hlt">MERCURY</span> CONCENTRATIONS AND POTENTIAL NEUROGPATHOLOGICAL CHANGES IN COMMON LOONS (GAVIA IMMER)</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Common loons (Gavia immer) in New England are exposed to high levels of <span class="hlt">mercury</span> through their diet. <span class="hlt">Mercury</span> bioaccumulates through the food chain as methylmercury, a neurotoxin which has been shown in <span class="hlt">controlled</span> feeding studies to have detrimental effects on the health and behavi...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title40-vol31/pdf/CFR-2013-title40-vol31-sec440-45.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title40-vol31/pdf/CFR-2013-title40-vol31-sec440-45.pdf"><span>40 CFR 440.<span class="hlt">45</span> - Effluent limitations representing the degree of effluent reduction attainable by the application...</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-07-01</p> <p>... (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY <span class="hlt">Mercury</span> Ore Subcategory § 440.<span class="hlt">45</span> Effluent limitations representing the degree of effluent reduction...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title40-vol30/pdf/CFR-2014-title40-vol30-sec440-45.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title40-vol30/pdf/CFR-2014-title40-vol30-sec440-45.pdf"><span>40 CFR 440.<span class="hlt">45</span> - Effluent limitations representing the degree of effluent reduction attainable by the application...</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-07-01</p> <p>... (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY <span class="hlt">Mercury</span> Ore Subcategory § 440.<span class="hlt">45</span> Effluent limitations representing the degree of effluent reduction...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title40-vol31/pdf/CFR-2012-title40-vol31-sec440-45.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title40-vol31/pdf/CFR-2012-title40-vol31-sec440-45.pdf"><span>40 CFR 440.<span class="hlt">45</span> - Effluent limitations representing the degree of effluent reduction attainable by the application...</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY <span class="hlt">Mercury</span> Ore Subcategory § 440.<span class="hlt">45</span> Effluent limitations representing the degree of effluent reduction...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014ACP....14.2219S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014ACP....14.2219S"><span>Atmospheric <span class="hlt">mercury</span> speciation and <span class="hlt">mercury</span> in snow over time at Alert, Canada</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Steffen, A.; Bottenheim, J.; Cole, A.; Ebinghaus, R.; Lawson, G.; Leaitch, W. R.</p> <p>2014-03-01</p> <p>Ten years of atmospheric <span class="hlt">mercury</span> speciation data and 14 years of <span class="hlt">mercury</span> in snow data from Alert, Nunavut, Canada, are examined. The speciation data, collected from 2002 to 2011, includes gaseous elemental <span class="hlt">mercury</span> (GEM), particulate <span class="hlt">mercury</span> (PHg) and reactive gaseous <span class="hlt">mercury</span> (RGM). During the winter-spring period of atmospheric <span class="hlt">mercury</span> depletion events (AMDEs), when GEM is close to being completely depleted from the air, the concentration of both PHg and RGM rise significantly. During this period, the median concentrations for PHg is 28.2 pgm-3 and RGM is 23.9 pgm-3, from March to June, in comparison to the annual median concentrations of 11.3 and 3.2 pgm-3 for PHg and RGM, respectively. In each of the ten years of sampling, the concentration of PHg increases steadily from January through March and is higher than the concentration of RGM. This pattern begins to change in April when the levels of PHg peak and RGM begin to increase. In May, the high PHg and low RGM concentration regime observed in the early spring undergoes a transition to a regime with higher RGM and much lower PHg concentrations. The higher RGM concentration continues into June. The transition is driven by the atmospheric conditions of air temperature and particle availability. Firstly, a high ratio of the concentrations of PHg to RGM is reported at low temperatures which suggests that oxidized gaseous <span class="hlt">mercury</span> partitions to available particles to form PHg. Prior to the transition, the median air temperature is -24.8 °C and after the transition the median air temperature is -5.8 °C. Secondly, the high PHg concentrations occur in the spring when high particle concentrations are present. The high particle concentrations are principally due to Arctic haze and sea salts. In the snow, the concentrations of <span class="hlt">mercury</span> peak in May for all years. Springtime deposition of total <span class="hlt">mercury</span> to the snow at Alert peaks in May when atmospheric conditions favour higher levels of RGM. Therefore, the conditions in the</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_25 --> <div class="footer-extlink text-muted" style="margin-bottom:1rem; text-align:center;">Some links on this page may take you to non-federal websites. 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