Sentences with phrase «many air samples»

The five - year, $ 500,000 grant will allow for analysis of a backlog of air samples to discern the contribution of CO2 from man - made sources

To see if these regulations affected bromine concentrations, atmospheric chemist Stephen Montzka of the National Oceanic and Atmospheric Administration in Boulder, Colorado, and colleagues analyzed air samples taken several times each month from 10 land - based sites across the globe between 1995 and 2002.

It is much cheaper to test ice cores, which capture years of data in one core, than to do repeated air sampling over time.

At that point only minimal air sampling had been done because all the air monitors had been destroyed.

For a year, in addition to testing air samples for radioactive isotopes, Bartke collected soil organisms, insects and other invertebrates, and a few snakes and lizards, making do with the little equipment and few supplies that he had.

A national air sampling system tasked with picking up terrorist biological attacks faces scrutiny

The new Schmidt grant will allow the Scripps team to chip away at a years - long backlog of air samples to measure changes in the ratio of carbon isotopes, which provides information about manmade sources of CO2.

In another study by Hites, two new flame retardants — one of them sold as Firemaster 550 — were detected in more than half of the air samples taken at six sites along the shores of the Great Lakes, with the highest concentrations around Chicago and Cleveland.

Over a period of six weeks, the researchers collected air samples in Pasadena, located in the notoriously smoggy Los Angeles valley.

The team traced the molecules found in these air samples to their original sources using databases that show the specific volatile organic compounds released by specific products.

«The debris pile acted like a chemical factory,» atmospheric scientist Thomas Cahill of the University of California - Davis explained to the American Chemical Society in 2003, after analyzing many of those air samples.

The team found that zapping mixtures of air with electricity, which simulates the chemistry of the upper atmosphere, could produce enriched levels of 15N15N like they measured in air samples.

The real answer to that question will never be known as few direct measurements were taken of the plume that followed the disintegration of the two towers into a blizzard of dust, though air samples were collected in subsequent weeks and months.

The researchers tested air samples from ground level and from altitudes of about 20 miles, as well as dissolved air from shallow ocean water samples.

About 60 percent of respondents reported symptoms that would be expected in people exposed to high levels of the chemicals found in the air samples, Subra said.

The scientists collected air samples on the ground in Malaysia and Taiwan, in the region of the South China Sea, between 2012 and 2014, and shipped them back to the UK for analysis.

Regulators failed to collect air samples in the week following a radiation release at a New Mexico nuclear waste dump because of a vacancy in the office responsible for monitoring the site

But I was interested in finding out what else I might be breathing, so I borrowed an air sampling pump from Jennifer Richmond - Bryant, an assistant professor of environmental and occupational health sciences at Hunter College in New York City.

The new study did not track where the airborne chemicals came from, but it suggests that personal care products are a major source since D5 was the dominant compound in both indoor and outdoor air samples.

Multiple federal, state and commercial air sampling networks are deployed across the country for various applications including radiological detection.

«Any national security incident would likely be significantly bigger, and could potentially be detected and reconstructed using data from fewer or more widely - spaced air sampling stations downwind of the release.»

To check their results, the team collected air samples on six light aircraft flights over the San Joaquin Valley between Fresno and Visalia, a heavily farmed region within the Central Valley.

And WIPP had also installed air sampling equipment stretching away from the facility for many miles.

Personal air sampling was completed during pregnancy to estimate prenatal PAH exposure.

He came to relish the task, investigating orange clouds from an ammunition plant in Tennessee and taking air samples from strip mines in Wyoming.

Instead, they were interested in a pollutant that Jaffe had not looked for in his air samples: mercury.

«For example, ocean currents can disperse microorganisms, but there is also evidence that microorganisms travel by air: microbes believed to have originated from the Gobi desert were collected in air samples from the northwestern United States.»

The air samples were collected from a station close to what is known as the well pad, but not the pad itself.

The scientists investigated the waters near Guam last winter using three different high - tech aircraft to collect air samples and examine the abundance, distribution and transformation of various gases in the tropical atmosphere.

Between January 2008 and November 2010, researchers at the Colorado School of Public Health collected air samples in Garfield County, Colo., which has been experiencing intensive drilling operations.

At present, emergency responders who are characterizing potential radiological risk need to take an air sample and ship it to a radiochemistry lab after preliminary screening analysis.

The air samples will be analysed at the Langley Research Centre, and should reveal significant differences compared with today's atmosphere, with its growing concentrations of greenhouse gases.

Immediately after the incident, the Wallops» industrial hygienist collected air samples at the Wallops mainland area, the Highway 175 causeway, and on Chincoteague Island.

As the air samples are drawn, the air will be replaced with argon — a heavy, inert gas which will not react with the organic contents of the coffins.

The new approach involves using a radiation detector to take multiple periodic measurements of an air sample for at least two hours.

In October 2006, a team led by the EPA began to assess residents» exposure to erionite by collecting air samples while simulating everyday activities.

It can be used to detect biological contaminants in food and water, characterize animal diets from dung samples, and even test air samples for bacteria and fungal spores.

Since 2006, he has worked with NOAA's air sampling system that uses glass flasks to collect atmospheric samples from 44 different sites around the world to track the annual increase of ethane and other so - called volatile organic compounds in the air.

The first clues appeared in 2007, when NOAA researchers noticed occasional plumes of pollutants including methane, butane and propane in air samples taken from a 300 - metre - high atmospheric monitoring tower north of Denver.

Weiss had to distill, heat and pass the air samples over adsorbents to remove gases such as carbon dioxide and krypton that could foul the extremely sensitive detector.

The air sampled from the South Pole's clean air sector (a zone where air traffic, land vehicles, and even foot traffic is strictly limited) is touted as the cleanest air on Earth.

Subra, a chemist and microbiologist who works gratis with poor communities to take on big corporations, held workshops at a local church to teach residents how to use the buckets to collect air samples and keep diaries so they could match their physical symptoms with what they smelled in the air.

NOAA, for example, which runs a global, cooperative air sampling network, reported last year that all Arctic sites in its network reached 400 ppm for the first time.

Air samples were taken during three consecutive periods from July to November, 2015.

Researchers worked with residents affiliated with Hands Across the River Coalition to select air sampling locations at 18 sites in New Bedford, Fairhaven, Dartmouth, and Acushnet.

Then Wilma Subra stepped in — with a plastic paint bucket outfitted with a simple battery - operated pump to collect air samples — and provided residents with the clear evidence they needed.

Cahill has led some of the most exhaustive scientific studies of 9 / 11 - related toxins, and he has discovered a large number of health - threatening substances from air samples taken in the weeks and months after 9/11.

Three days after 9/11, following questionable air sampling techniques, a spokesperson for the EPA said that levels of asbestos were either at low levels, negligible, or undetectable.

In a study published in Geophysical Research Letters, researchers analyzed air samples and found that atmospheric NF3 seems to be growing by 11 percent each year across the globe.

The highest readings for airborne PCBs were from air sampling locations closest to the harbor.