Tag: "contaminant" at biology news
Rutgers-led research team finds Hudson River is cleaning itself
...both of Rutgers, say that the long-term decreasein contaminant
levels is due mainly to a number of control measuresmandated by the federal Clean Water Act. They cited in particular a strict permitting system for discharginginto the river chemicals from factories, sewage treatment plants andother facilities near ...
Supplement reduces risk of aflatoxin-related liver cancer
...wn carcinogens, are produced by a fungus that is a contaminant
of grains such as corn, peanuts and soybeans. Levels of aflatoxin are carefully regulated in the United States but are often far higher in the food supply of many developing nations and are known to cause liver cancer, especially in concert with ot...
Paradox of groundwater age has implications for hydrology
...ly, for example, or to predict the rate at which a contaminant
will migrate through the ground. Groundwater tends to flow through aquifers that are constrained by layers of less permeable rock called aquitards. Hydrologists commonly figure that a groundwaters age reflects the time it takes to migrate along the ...
A greener, cleaner groundwater cleanup process
... combined with monitored natural attenuation - the contaminant
degradation that takes place naturally in the TCE plume - is expected to save $23 million at TAN. Cost savings achieved at TAN were the direct result of integration of cleanup operations funded through the DOE-HQ Office of Project Completion (EM-40)...
Chimpanzee virus may be key to better vaccines, study shows
...and her colleagues have developed. Concerns that a contaminant
might accompany the vaccine - a virus like HIV, fo...replication of the virus are deleted. Any possible contaminant
- another virus, a bacterium, even a prion - is eliminated in this process. "Because of the laborato...
New technique monitors chromium contamination in groundwater
...nt chromium is a suspected carcinogen and a common contaminant
in groundwater. Now, scientists have discovered a...nowing how fast the reaction is occurring within a contaminant
plume would help investigators decide whether natural attenuation is a viable approach at a site, or...
April GEOLOGY and GSA TODAY media highlights
...is important in understanding topics as diverse as contaminant
transport, management of groundwater resources, ore genesis, hydrocarbon migration, and carbonate reservoir diagenesis. Reflux is a style of groundwater circulation set up by increasing the density of seawater, through restriction and evaporation, on...
NATO picks promising pollution solution at NASAs Marshall Center for pilot study program
...Monitoring of the area after the injections showed contaminant
concentrations in the affected area were reduced by more than 90 percent. Monitoring results at another site, called SA-12, near a building where routine cleaning and degreasing of parts occurred (during development of the U.S. space program) were no...
New device removes drinking water contaminants
...nmentally friendly system also works on nitrate, a contaminant
from agricultural fertilizers that can cause methemoglobinemia, or blue-baby syndrome, in infants, and is expected to be successful with other oxidized pollutants, such as bromate, selenate, heavy metals, radionuclides, and a range of chlorinated sol...
Membrane filters offer options for cleaner water
.... Ultimately, we could tailor-make filters for any contaminant
in any water source, whether it's surface water or ground water, for example," Chellam says. "We have membranes, for example, that can that remove large protozoa such as cryptosporidium, which caused several deaths and many thousands of illnesses in ...
Molecular study questions Pfiesteria's link to coastal fish kills, threat to public health
... means the tanks invariably contain many different contaminant
species including amoebae. "Thus, it is not possible to determine life cycle stages of P. piscicida from fish tanks without the use of species-specific molecular probes," they said. "Consequently, any ecological role or potential toxicity ascribed t...
Corroding plumbing materials producing environmental problems
...thetic problems can occur from microbial growth or contaminant
leaching from metallic, plastic, and concrete plumbing material. The environmental impacts from the deteriorated plumbing include holes in pipes formed through corrosion, which allow the influx of contaminants into drinking water systems, the loss of...
INEEL competes successfully for DOE EMSP funding
...rstand long-term integrity, corrosion impacts, and contaminant
transport from containers. "Since 2000, INEEL has heavily invested in increasing the Laboratory's capabilities to conduct state-of-the-art subsurface research by hiring additional staff and building research facilities. Our success in competing for E...
INEEL geoscientist to present NAPL contaminant modeling advance at AGU Meeting
...December 6, 2002INEEL geoscientist to present NAPL contaminant
modeling advance at AGU MeetingBy modifying the mathematical theory describing the relationship between permeability, saturation, and pressure in a multiple fluid system, researchers can now more accurately predict the movement of non-aqueous phase l...
Scientists find geochemical fingerprint of World Trade Center collapse
...enter catastrophe, and for validating sediment and contaminant
transport models already developed for the lower H...Olsen, "Determining the variations in particle and contaminant
dynamics can be difficult, since fine-particle transport involves numerous shortterm episodes of dep...
Fighting fire with fire? Vaccine based on chimp virus shows promise against HIV
...mpletely safe. To eliminate the possibility of any contaminant
- an HIV-like stowaway, for example - the vaccine is derived in the laboratory from a set of genetic instructions. Importantly, too, the genes that would be needed by the viral vaccine to replicate are deleted from those instructions. The vaccine is ...
Science picks -- leads, feeds and story seeds (February 2003)
...better than that reported in the other cities. The contaminant
that most adversely affects the use of the river after rainstorms is fecal coliform bacteria, much of which comes from residential areas, following various pathways to the river. Some bacteria wash off after accumulating on rooftops, streets, parking...
Natural Science and Public Health: Prescription for a Better Environment
... of these clusters correspond to areas having high contaminant
levels for drinking water. USGS is working on a similar study in northern New England to determine if a high incidence of bladder cancer is linked to elevated arsenic in private well water. And near Fallon, NV, scientists have found that elevated l...
Gold nanoparticles and catalytic DNA produce colormetric lead sensor
...he color depends upon the initial concentration of contaminant
metal ions. By applying the DNA-gold nanoparticle ... DNA will shift the sensor's sensitivity to higher contaminant
concentrations without saturation. By using various combinations of active and inactive catalytic DN...
Systems tool new resource to aid groundwater cleanup
... of contaminants at a site, SAC determines how the contaminant
will behave. SAC models how the contaminant
will discharge to the soil and move to the groundwater, discharge into the groundwater and, finally,...
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