Current Nitrate News and Events | Page 13

Current Nitrate News and Events, Nitrate News Articles.
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Study shows life-threatening link between Viagra and nitrates and recommends guidelines for safe use
A study published in tomorrow's edition of Circulation reports that sildenafil citrate (Viagra), when combined with nitrates, can cause serious and prolonged decreases in blood flow through critically narrowed coronary arteries. (2000-11-12)

Pittsburgh researcher receives national award
Chemical engineer Raman Venkatesh of Pittsburgh, Pa., will be honored on August 20 by the world's largest scientific society for developing the first cost-effective process to remove the toxic contaminants perchlorate and nitrate from drinking water. He will be designated one of 12 Heroes of Chemistry by the American Chemical Society at its 220th national meeting in Washington, D.C. (2000-08-17)

New test for presence of nitric oxide could improve medical knowledge
Researchers supported by the National Science Foundation (NSF) have developed a means to detect nitric oxide that could help improve scientists' understanding of this molecule's role in neurological signaling and other biological functions. (2000-06-19)

Fertilizers linked to amphibian deaths
Researchers have discovered that a level of nitrogen-based compounds which the EPA says is safe for human drinking water - a level often found in agricultural areas as a result of using crop fertilizers - is enough to kill some species of amphibians. (2000-01-04)

Biodiversity yields dividends, finds pan-European research
The loss of biodiversity in European grasslands will make them less productive, reducing the amount of energy available to the rest of the food chain and threatening the overall health of the ecosystem, say results from one of the world's most extensive ecological studies (Science 5 November 1999). (1999-11-04)

Agronomists offer alternative approaches to gulf pollution
Modifying tile drainage systems and crop rotations in farmer's fields are the best methods to prevent nitrates from fertilizer from leaking off farms and into nearby streams, say two Purdue University agronomists. (1999-07-01)

Biggest Bacteria Ever Found
In the 16 April 1999 Science, researchers report finding the biggest bacteria ever known. In addition to its relatively giant size, the new microbe is an exotic organism that provides firmer evidence of coupling between two key environmental cycles. (1999-04-16)

The Largest Bacterium: Scientist Discovers New Bacterial Life Form Off The African Coast
Biologists from the Max Planck Institute for Marine Microbiology in Bremen, Germany, found the largest microorganisms yet discovered during a cruise with the Russian research vessel (1999-04-16)

Seabed Silt In Indian Ocean Consists Of Remains Of Summer Plankton
Almost 90% of the silt on the floor of the Indian Ocean consists of the remains of blooming plankton during the summer monsoon. This has been discovered by earth scientists at the NWO's Netherlands Institute for Sea Research. The blooming of plankton is dependent on the monsoon climate. Therefore, oceanic sediments provide insides into climatic changes in the past. (1999-04-13)

Purdue Study Rethinks Atmospheric Chemistry From Ground Up
A Purdue University research team studying natural processes that affect ozone in the Arctic atmosphere has discovered that snowpacks not only absorb chemicals from the atmosphere, but also can help produce them. (1999-03-18)

A Bacterium Can Help Slow Global Warming
A bacterium that digests methane is doing its bit to slow global warming, say the American, German and Russian researchers who discovered it. But they warn that the bacterium--the first of its kind to be found in acidic wetlands--is under threat from industrial pollutants. (1999-03-17)

Bedrock May Be Culprit In High Stream-Water Nitrate
Local geology, not disruptive human activities, may be to blame for elevated nitrate levels in some streams and lakes, report researchers at the University of California, Davis, who studied a watershed in California's Sierra Nevada mountains. (1998-10-21)

INEEL And WSU Researchers Coax Bacteria To Clean Up Toxic Chromium
A team of researchers has tricked the bacteria from contaminated soil into cleaning up the toxic heavy metal chromium. A DOE bioremediation grant will fund the study of how bacteria commandeer enzymes that may normally reduce nitrate to reduce toxic chromium instead. (1998-10-08)

Clean Air Act Reduces Acid Rain In Eastern U.S.
Acid rain levels have decreased as much as 20 percent over a large region of the Eastern U.S. thanks to the Clean Air Act of 1990, according to a Penn State researcher. (1998-09-23)

Minuscule Ocean Plants Help Stabilize Earth's Atmosphere, Climate
Evolving into diverse forms over billions of years, tiny one- celled marine plants and bacteria have, up to now, successfully interacted with the changeable physics and chemistry of the land and sea to stabilize to a surprising extent the relative concentrations of Earth's atmospheric gases, according to a report in the July 10 issue of the journal Science. (1998-07-09)

Study Of Fertilizer Runoff Suggests Changing Time Of Application
Researchers studying an Illinois watershed have gained insight into nature's role in using nitrogen fertilizer efficiently and whether the fertilizer leaches into rivers. (1998-07-06)

As A 'Carbon Sponge,' Iron-Poor Coastal Waters Can't Always Do The Job, NaturePaper Shows
Like a sponge, the Earth's oceans store the greenhouse gas, carbon dioxide--but certain coastal waters can't perform this trick because they lack iron, a University of Delaware researcher reports in the June 11 issue of the journal, Nature. (1998-06-10)

Computers, GIS Help Prevent Ground Water Contamination
A Purdue University agricultural engineer has combined a computer model with geographic information systems (GIS) data from satellites to develop a plan to keep agricultural chemicals out of ground water. (1998-05-28)

Water Quality In Georgia-Florida Coastal Plain Affected By Agricultural And Urban Activities
Water quality is generally good in the Georgia-Florida Coastal Plain but has been adversely affected by agricultural and urban land uses in some areas, according to the results of a five-year investigation by the U.S. Geological Survey (USGS). (1998-04-27)

USGS Says Central Columbia Plateau Water Quality Impaired by Agriculture, But Some Good News
Water quality in the Central Columbia Plateau of eastern Washington and western Idaho has been adversely affected by agriculture, especially in irrigated areas, according to the results of a five-year investigation by the U. S. Geological Survey (USGS). Some improvements, however, are noticeable, such as less sediment being washed into streams. (1998-04-22)

Agriculture and urban activities impact water quality in the South Platte River Basin
Although agriculture and urban activities have substantially affected water quality in several areas of the South Platte River Basin, concentrations of pesticides and volatile organic chemicals (VOCs), such as MTBE, are generally below levels of concern for human health, according to the results of a 5-year investigation of water quality by the U.S. Geological Survey. (1998-04-16)

Reduced Nutrients Still Cause Problems In The Neuse And Tar-Pamlico Rivers
Concentrations of phosphorus and nitrogen have generally declined since 1980 in streams draining into the Albemarle and Pamlico Sounds in North Carolina but remain high enough to cause water-quality problems in the Neuse and Tar-Pamlico Rivers, according to the results of a 5-year investigation by the U.S. Geological Survey (USGS). These findings are consistent with recent public concerns about Pfiesteria, fishkills, algal growths, and pollutants in these two river basins. (1998-04-16)

From The Home Front To The River Front, USGS Updates Water-Quality Information
Two U.S. Geological Survey water-quality studies in the Lower Susquehanna and Potomac River Basins found high levels of nitrate and high counts of bacteria in ground water from wells used for household supply in several rural areas. (1998-04-16)

Water Quality In Indiana's White River Basin Affected By Urban And Agricultural Activities
Water quality in the White River Basin is impacted by urban and agricultural activities, according to the results of a five-year investigation by the U.S. Geological Survey (USGS), Department of the Interior. (1998-04-08)

Nitrate Reductase: A Magical Enzyme?
Researchers at Michigan Tech are studying an enzyme that is being used to help clean up the environment and has great potential to be part of the solution to the global problem of excess nitrate and related nitrogen nutrients in water sources. (1998-03-09)

Government Should Limit Access To Explosives, Use Existing Detection Technologies To Avoid Bombings
Additives that improve detection of explosives before detonation or determine their origins after a blast are not yet practical enough for broad use in the United States, according to a new National Research Council report. Nor is there a practical method available to neutralize the explosive properties of ammonium nitrate, a commonly available fertilizer that was used in the 1995 Oklahoma City bombing. (1998-03-04)

Duke Professor's Cruise Data Suggest Antarctic Seas Are Major Carbon Dioxide Burial Site
A frigid summer cruise to the south polar ice pack's edge has convinced the expedition's chief scientist that the Antarctic region holds the key to how the world's oceans will affect global warming. (1998-02-10)

Virginia Tech Engineers Help Mother Nature Clean Up
Virginia Tech environmental engineers, working with the railroad, an Iowa tree company, and a consulting firm, are attempting to use Mother Nature to restore a site contaminated by a leaking creosote holding pond. More importantly, they hope the knowledge gained from this project will enhance the use of natural biological means to correct environmental problems. (1998-01-31)

New Ultrafine Metal Powder Production Process
Researchers at Penn State's Applied Research Laboratory (ARL) have developed a faster, cheaper and cleaner method of producing ultrafine metal powders, such as silver used in solder, dental fillings, circuit boards, high-speed photographic film and a host of other applications. (1997-10-31)

Basin Traps Air Pollution In Mexico City: International Study Has Implications For U.S. Cities
The first detailed measurements in Mexico City of pollutants such as peroxyacetal nitrate show concentrations similar to those that burned eyes and lungs in Los Angeles in the early 1970s, according to preliminary results of a field study conducted earlier this year. Peroxyacetal nitrate also is implicated in the production of ozone, another irritant that makes breathing difficult. The international study has implications for U.S. cities (1997-09-09)

CU-Boulder, Colorado Town Wrapping Up Pilot Drinking Water Treatment Project
The University of Colorado at Boulder and the town of Wiggins, Colo., are wrapping up a pilot project which shows a novel drinking-water treatment process that removes nitrates from groundwater is both efficient and cost effective. (1997-08-29)

Monsoons Of Arabian Sea Control Productivity And Carbon Export
Investigation of the oxygen and nutrient content of the Arabian Sea could help shed light on how monsoons influence ocean productivity and the carbon cycle, according to a Penn State oceanographer (1996-12-17)

World's Smallest Test Tubes Host Chemical Reaction
A team of researchers has carried out a chemical reaction in what may be the world's smallest set of test tubes: carbon nanotubes with inside diameters of less than ten nanometers and lengths of just one micron. The work, reported in the December 13 issue of the journal Science, could have applications in microelectronics and other fields in which extremely small structures would allow production of new nanoscale devices (1996-12-16)

Nitrogen And Global Warming
Nitrogen from air pollution is unlikely to moderate the greenhouse effect, according to researchers at the universities of Minnesota and Toronto. Studies on prairie grasses showed that medium and high rates of nitrogen addition caused loss of species diversity and lowered carbon storage capacity (1996-12-06)

No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
Modern society pollutes the air not only with carbon dioxide, but also with large amounts of nitrogen-containing compounds released by the burning of fossil fuels and the use of fertilizers. Scientists had hoped that this extra nitrogen would spur the growth of plants and that the plants, in turn, would absorb some of the extra carbon dioxide in the atmosphere to moderate global warming (1996-12-05)

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