Tag: "mercury" at biology news
Water Quality In Indiana's White River Basin Affected By Urban And Agricultural Activities
...however, fish-consumption advisories for PCB's and mercury
are in effect for some locations in the basin." Several chemicals whose use has long been banned (chlordane, dieldrin, and PCB's) persist in streambed sediments and are concentrated in organisms such as freshwater clams. Fish communities have signif...
From The Home Front To The River Front, USGS Updates Water-Quality Information
...boro, Va., has led to measurable concentrations of mercury
in sediment as far as 170 miles downstream on the ...near Harpers Ferry, W. Va., even though the use of mercury
at the Waynesboro site ended in 1950." The studies of the Lower Susquehanna and Potomac River Basins...
Water Quality In Georgia-Florida Coastal Plain Affected By Agricultural And Urban Activities
...e U.S. for many years. Lead, chromium, zinc, and mercury
in streambed sediments were found at levels that could adversely affect aquatic organisms in a number of samples. A new 34-page color report summarizes the results of the study, which included 3 years of intensive sampling and data analysis as part...
Interdisciplinary Method Offers New Way To Study Ribozymes
...id. "Our method combinesthe high thiophilicity of mercury
with the selective placing of phosphorothioatesto ...iversity, have successfully demonstratedthe use of mercury
in metal ion derivatives for the spectroscopic studyof metalloproteins. "By combining the phosphoro...
China And USGS--Working Together On Environmental Issues
...SGS scientists may also havediscovered evidence of mercury
poisoning caused by the domestic combustion ofhigh-mercury coals in China. Coal is also an important energy resource in the United States, where almost 60percent of electricity produced is generated from coal combustion. In the U.S.,coal is burned in...
Gritty Research Leads Scientists To Metal-Loving Discovery
...contamination is prevalent, and for the removal of mercury
from radioactive and hazardous wastes. Mercury, released from a number of natural and man-made sources, can cause serious health effectsif inhaled or ingested. "In addition to being able to clean mercury-contaminated sites, webelieve SAMMS also has a...
Commercial Fish: Eat Up, Despite Low Levels Of Mercury
...e eat nearly a dozenfish meals each week and whose mercury
levels are about 10 timeshigher than most U.S. cit...y eat in the Seychellescontains the same amount of mercury
as fish sold at supermarketsand eaten in the United States." Adds first author Philip Davidson,...
Nuts And Oats May Build A Strong Heart
...lic (top number) bloodpressure by 7 millimeters of mercury
(mm/Hg) at the end of the six-week studycompared to 2 mm/Hg for the wheat group. "Blood pressure lowering is generally a good thing for the population. Thequestion here is: if this dietary intervention works to reduce normal bloodpressure, can we a...
A Disease Last Seen In The 1950's Has Struck Again
...ildren. They had eaten fish from a bay polluted by mercury
from a metalsplant. Last week, Maszumi Ha...d San Luis do Tapaj's who had highlevels of methyl mercury
in their bodies. He found three with nervous symptomspeculiar to Minamata disease, including fits of...
Hold The Salt: Gene May Explain African Americans' Extra Sensitivity To Salt, Leading To High Blood Pressure
...raise blood pressure as much as fivemillimeters of mercury
(mm Hg) in people who have the gene variant. "This is a new finding -- no one has reported this association in AfricanAmericans," says the study's lead author, John M. Flack, M.D., professor andassociate chairman, department of internal medicine, and...
Engineered Bacteria Scavenge Heavy Metals
...nes from another bacterium -- to seek andtransport mercury
through E. coli cell membranes -- as well as genesfrom yeast -- to accumulate mercury
inside each E. coli cell. The samestrategy, they believe, can be used to re-engineer E. coli ...
Study Of Children's Fillings Finds No Mercury Exposure
...ol of Dentistry. Environmental exposure to mercury
was low in the North Carolina childrenstudied, the...illings," Dilley said. "We did find tinyamounts of mercury
in the teeth we examined, but statistical analysis showed nocorrelation between the number of fillin...
Tipsheet: Environmental Story Ideas
... some watersheds are morevulnerable than others to mercury
contamination. The research team is comparingnotes from two diverse landscapes: Rivers of the Lake Superior Basin and theFlorida Everglades. Program director David Armstrong says researchers are finding that watershedswith a high proportions of wetl...
New England Water Is Improving But Problems Remain, Says New USGS Report
...om-dwelling organisms, effects of the depostion of mercury
from theatmposphere into lakes and fish, and the direct and indirect sources ofpollutants in rivers. The USGS report describes the geology, climate, soils, rivers and streams,ground waters, plant and animal habitats on land and in the water, and huma...
List of MAK and BAT values 1999 published - New classification for chemical substances in the workplace air
...ing a carcinogenic potential), and sowere metallic mercury
and its inorganic compounds after its organic comp...rylonitrile, glyoxal, 2,4,6-trinitrophenol,organic mercury
compounds as well as other acrylates and woods are new entriesin this category. Six substances were ...
Congress briefs: International congress on ecosystem health
...ss of 85 percent of its wetlands, contamination by mercury
andpesticides, and replacement of 65 percent of its native fish by non-nativespecies. And it is the location of a federal hazardous-waste site. Thetroubled ecosystem provides an excellent laboratory for scientists to study theeffects of multiple ec...
Mercury can jump barrier that keeps toxins out of brain
...archers say they have found the first evidencethat mercury
can circumvent the blood-brain barrier that usuall...est scientific society. The researchers found that mercury
dissolved in lake and river water can enterthe nerves that connect water-exposed sensory receptors (...
Researchers find high levels of mercury in native ore deposits
...is mercury. "Currently suspected sources of mercury
include chlor-alkali plants,paper mills, and munic...e environments of Lake Superior. "We found mercury
at high concentrations relative to background,increasing towards shoreline regions," explained Kerfo...
USGS finds elevated levels of organochlorine pesticides in Aleutian bald eagles
...he westernmost island, Kiska, where levels of mercury
and DDE were significantly higher. The number of ... Although the researchers now know that DDE and mercury
are in the food chain of the Aleutian Islands, they are not sure of the exact source of th...
Study shows that hydrothermal vents release mercury
Hydrothermal vents on the ocean floor release mercury
into the sea, geologistshave found. The finding ra...alysisof the samples showed that the vents release mercury
from sediments containingpure mercury
sulphides (Geology, vol 27, p 931). The team calcu...
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