Sentences with phrase «environments at concentrations»

The field component of this study is one of the first to report amphetamine in wastewater - impacted environments at concentrations approaching 1 μg L - 1.

Currently, silver nanoparticles are present in the environment at the concentrations that are about one in a thousandth times the dose that would be toxic to fish and other marine animals (23).

Not exact matches

«The general explanation that a capital rich environment is causing a concentration among safer prospects at the late stage only partially explains such continued unicorn funding,» states the report.

So Weschler and Wisthaler simulated a typical office environment at the Technical University of Denmark in Copenhagen — two people in a carpeted 28.5 — cubic meter room at a temperature of 23 degrees Celsius with two small stainless steel tables, two chairs, two flat - screen LCD monitors, two headsets, one walkie - talkie, one small mixing fan, a few books, two laptops, two bottles of water and ozone concentrations that reached roughly 32 parts per billion, an average exposure for a hot, smoggy day.

The effect is most severe at lower doses, according to new research, including concentrations similar to what might be found in the environment.

The most heavily used herbicide in the United States, atrazine, makes hermaphrodites of male frogs at concentrations commonly found in the environment, according to a study published in the 16 April issue of the Proceedings of the National Academy of Sciences.

By performing experiments in the precisely controlled environment of the CLOUD chamber, the project's scientists can change the concentrations of chemicals involved in nucleation and then measure the rate at which new particles are created with extreme precision.

Previous lab studies found the compound toxic to certain species — small rainbow trout and water fleas — at concentrations that are expected in the environment.

«This underscores that large, sustained changes in global temperature like those observed over the last century require drivers such as increased greenhouse gas concentrations,» said lead author Patrick Brown, a PhD student at Duke's Nicholas School of the Environment.

Since the chemicals were discovered, researchers have found a relationship between PCB concentrations in blood and decreased cognitive and thyroid function, and elevated risk of diabetes, cardiovascular disease and hypertension among the Mohawk Nation, said David Carpenter, director of the Institute for Health and the Environment at the University at Albany.

«Stabilization of concentrations [of greenhouse gases] in the atmosphere will ultimately require nearly net - zero emissions before the end of the century,» says Richard Bradley, head of the energy efficiency and environment division at the International Energy Agency in Paris.

Humans have long had a knack for concentrating heavy metals that would otherwise remain at low concentrations within the environment.

At first glance, the results are reassuring because the silver concentrations that the algae are subject to in the environment are rarely as high as those applied in the lab, which allows them to recover quickly — at least externallAt first glance, the results are reassuring because the silver concentrations that the algae are subject to in the environment are rarely as high as those applied in the lab, which allows them to recover quickly — at least externallat least externally.

The Pallas research infrastructure has been extensively instrumented for modern and versatile monitoring of the environment since the start of continuous monitoring of atmospheric sulphur dioxide (SO2) and ozone (O3) concentrations at Sammaltunturi in September 1991, and with the setup of the Global Atmosphere Watch (GAW) station in 1994.

Even though the levels found in the environment are low, in general below the minimum inhibitory concentration for most bacteria, they may still result in an increased selection pressure at some sites [4], [6].

Studies in bullfrogs found that triclosan disrupts the endocrine system — blocking the tadpoles» development into frogs at concentrations found in the environment.

Due to Tricia's insight on better snacking habits, I have noticed a healthier work environment at my office... concentration levels are higher and... anxiety levels are lower.

The links between a healthier lunch and better concentration from pupils in the afternoons are well documented, but an independent study looking at the relationship between school meal take up and dining environments suggests that the huge efforts to improve the quality of school food over the last six years could go to waste unless schools ensure their canteens are also fit for purpose.

Teachers hoping to hold on to their tenure rights tend to leave for more stable work environments if they can find them, and parents who have the means tend to pull their kids from the ASD charter schools in search of alternative options, leaving even larger concentrations of low - income, at - risk youth in the ASD schools.

Another investigator reviewed medical records and recorded signalment, environment, previous disease, diseases evident at time of radiography, FeLV vaccination and infection status, feline immunodeficiency virus serologic status, serum creatinine concentration, serum globulin concentration, and any other important findings.

«commercially compressed CO [gas must be] used and the following precautions... taken: (1) personnel using CO must be instructed thoroughly in its use and must understand its hazards and limitations; (2) the CO chamber must be of the highest quality construction and should allow for separation of individual animals; (3) the CO source and chamber must be located in a well - ventilated environment, preferably out of doors; (4) the chamber must be well lit and have view ports that allow personnel direct observation of animals; (5) the CO flow rate should be adequate to rapidly achieve a uniform CO concentration of at least 6 % after animals are placed in the chamber...; and (6) if the chamber is inside a room, CO monitors must be placed in the room to warn personnel of hazardous concentrations.

She is currently a graduate student at the University of Vermont's Rubenstein School of Environment and Natural Resources, pursuing her MS in Leadership for Sustainability, with a concentration in Ecological Economics.

Ellen Morris is the Director of the Energy and Environment Concentration at Columbia University's School of International and Public Affairs.

If the billions that is being wasted in the fools errand (of changing the CO2 concentration in the atmosphere that is increasing because of the warming oceans, http://www.woodfortrees.org/plot/hadcrut4gl/compress:12/from:1958/normalise/plot/esrl-co2/compress:12/derivative/normalise/detrend:-0.3) is spent on sewerage systems in some of the capital cities of the developing countries, we could have saved thousands of life now and at the same time helped the environment by preventing sewerage going to the rivers and bringing them back to life with fish and bird life.

Students at Duke University's Nicholas School of the Environment and Earth Sciences choose from undergraduate, graduate, or doctoral degrees in concentrations that include environmental studies and policy, earth and ocean sciences, and environmental law.

Totnes, which has been drawing free - thinkers with serious concerns about the environment for decades, now appears to have a concentration of like - minded individuals in the right place at the right time.»