Tag: "nitrate" at biology news

From Corn Rootworms To Art, Cornell's Reactor Is At The Core

... the water phase in one of two ways: add gadolium nitrate to make the water more opaque to neutrons, or replace light water with heavy water to make the "water" more transparent to neutrons. Cady also is proposing to use neutron radiography to measure vapor fractions in two-phase (boiling) flow. High vapor...

Basin Traps Air Pollution In Mexico City: International Study Has Implications For U.S. Cities

...s in Mexico City of pollutantssuch as peroxyacetal nitrate show concentrations similar to those that burnedey...d study conducted earlier this year. Peroxyacetal nitrate alsois implicated in the production of ozone, another irritant that makes breathingdifficult. ...

New Ultrafine Metal Powder Production Process

... it creates a tiny "hot spot" where the silver nitrate and reducing agent can react. The result is a tiny particle of silver. Singh can control the size and, to an extent, the shape of the particle by altering the laser energy, rotation speed and constituents of the reaction. He can make...

Virginia Tech Engineers Help Mother Nature Clean Up

...have proof that the vegetation istaking all of the nitrate out of the leachate, "and the treesare growing like wild fire." She adds that they have also been successfulin using the trees as part of a wastewater treatment process.A last step was added to the process that took the wastewaterand used the liqu...

Nitrate Reductase: A Magical Enzyme?

...rt of the solution to the global problem of excess nitrate andrelated nitrogen nutrients in water sources. ...e aim isto determine the structure and function of nitrate reductase. They want tocreate a 3-D model of the enzyme to gain understanding of how it works. ...

Water Quality In Indiana's White River Basin Affected By Urban And Agricultural Activities

...e between these extremes. Median concentrations of nitrate at monitoring sites in streams generally ranged fr...tates. Soil drainage is a major factor controlling nitrate concentrations in streams. "Concentrations tend to increase as the proportion of naturally or artifi...

Reduced Nutrients Still Cause Problems In The Neuse And Tar-Pamlico Rivers

...y by rural residents in many counties. The highest nitrate concentrations in ground water occurred in sandy, well-drained soils. High nitrate concentrations in water can cause "blue baby syndrome" and is the primary reason why the drinking-wa...

From The Home Front To The River Front, USGS Updates Water-Quality Information

...e to drink. The USGS studies found high levels of nitrate and high counts of bacteria in ground water from w...gricultural areas underlain by limestone contained nitrate concentrations that exceeded the U.S. Environmental Protection Agency's Maximum Contaminant Level f...

Agriculture and urban activities impact water quality in the South Platte River Basin

...in agricultural areas, we were mostconcerned about nitrate and pesticides in local drinking water," said Kevi...ot detected in well water, and only one well had a nitrate concentration above the U.S. Environmental Protection Agency drinking-water standard. VOCs, ...

USGS Says Central Columbia Plateau Water Quality Impaired by Agriculture, But Some Good News

... health, we were most concerned about checking for nitrate and pesticides in drinking water," said Sandy Will...USGS hydrologist and chief of the study. "We found nitrate levels exceeding the maximum contaminant level in about 20 percent of all wells." (A maximum contami...

Water Quality In Georgia-Florida Coastal Plain Affected By Agricultural And Urban Activities

...nationwide. In a row-crop agricultural study area, nitrate concentrations exceeded the U.S. Environmental Protection Agency (USEPA) drinking-water standard in 33% of ground-water samples from shallow wells. However, Marian Berndt, a USGS Hydrologist and principal author of the report, said that "nearby strea...

Can Contaminated Aquifers Restore Themselves?

...ted two forms of nitrogen commonly found insewage, nitrate and ammonium, in an unexpected way. Treated sewag...beds, where microbes used it to convertammonium to nitrate in a process called nitrification. Biological activityin the aquifer now is high enough to consume ...

Computers, GIS Help Prevent Ground Water Contamination

...percent of the samples. Half the sampled wells had nitrate levels above 2 parts per million (ppm)--below the ...hold water, Engel compared them to measurements of nitrate and pesticides in well water samples from across the state. His model predicted contamination proble...

Life In Antarctic Ice May Compare To Mars

... a little light, water, carbon dioxide, phosphate, nitrate and otherminerals. But in fact the primitive life processes they are undertaking arequite similar to those that first formed the oxygen-rich atmosphere of Earth andmade higher life forms possible. And in the study, the researchers cite two lo...

Minuscule Ocean Plants Help Stabilize Earth's Atmosphere, Climate

...hey don't pile up too much oxygen, carbon dioxide, nitrate orphosphate. Those are kept under some kind of biological control. That's how thepast has been. The big issue is, will the future work that way?" The paper was coauthored by Paul Falkowski of the Rutgers Institute ofMarine and Coastal Science...

Clean Air Act Reduces Acid Rain In Eastern U.S.

... the Southeast apparently causedhigher sulfate and nitrate concentrations during 1995 and 1996. With lessprec...necessarily suggest anincrease in total sulfate or nitrate deposition. Lynch is currently looking at1997 data to determine if sulfate and nitrate deposition re...

West Coast Measurements Confirm Asian Air Pollution Can Travel To U.S.

...ide, a direct byproduct ofcombustion; peroxyacetyl nitrate (PAN), indirectly caused by combustion; andparticulates, said Dan Jaffe, an associate professor who studies atmosphericchemistry and air pollution. Jaffe, along with UW research meteorologist Theodore Anderson, UW atmosphericsciences research profess...

A Bacterium Can Help Slow Global Warming

...niversity found that it is especially sensitive to nitrate andsulphate pollution from industry and traffic. They say that the methane outputof acidic wetlands is now higher than it was before the industrial revolution,because of the decline in this methane-eating bacterium. The team, whoseresearch has yet to...

Seabed Silt In Indian Ocean Consists Of Remains Of Summer Plankton

...ents required for the plankton to bloom, including nitrate and phosphate, from deeper water levels into the well lit surface ocean. Conditions for growth are therefore at their best during the summer in the top 150 metre layer of the ocean. This understanding of the most important sources of the various kin...

The Largest Bacterium: Scientist Discovers New Bacterial Life Form Off The African Coast

...vefrom sulfide produced in the sea floor and store nitrate from the seawater in an"anaerobic lung". It seems ...% of the cells internal volume. It is used tostore nitrate which the bacteria utilize to oxidize sulfide. The nitrateconcentrations within the cell can be up t...

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