Sentences with phrase «organic nitrogen compounds»

Not exact matches

Specifically, the Pigeon Air Patrol program is measuring nitrogen dioxide, ozone, and volatile organic compounds.

«Garden equipment engines emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5 % of the nation's air pollution and a good deal more in many metropolitan areas like Los Angeles.

The EU National Emission Ceilings Directive sets ceilings for each Member State for emissions of ammonia, oxides of nitrogen, sulphur dioxide and volatile organic compounds (VOCs).

The researchers reported finding several amino acids, as well as nitrogen - containing organic compounds called amines, on the foil in 2008.

One gallon of typical domestic wastewater contains enough organic compounds and nitrogen to power a 100 - watt lightbulb for five minutes.

But before life arose, nitrogen fixation must have occurred via purely chemical means: That's because amino acids and nucleic acids, which both contain nitrogen, were likely the organic compounds that developed into Earth's first lifeforms.

The pollutant that has declined the least is ozone, a hard - to - control noxious gas formed when nitrogen oxides and volatile organic compounds react with sunlight.

Volcanic plumes were ideal crucibles for sparking stable nitrogen to form reactive compounds that led to the first organic molecules, chemists report in the 15 August Geophysical Research Letters.

The air pollutants analyzed for the coal system included particulate matter (soot), mercury, volatile organic compounds, nitrogen oxides and sulfur oxides.

Fungi like this break down organic compounds into nitrogen.

Volatile organic compounds, carbon monoxide, and nitrogen oxides from Asian cars and industry mix in the atmosphere as they cross the Pacific Ocean and convert in sunlight into ozone, a main ingredient in smog, Jaffe explains.

Among biogenic volatile organic molecules is a class of compounds called monoterpenes, which react with ozone, hydroxyl radicals, nitrogen oxides, and other gases in the atmosphere.

Like vehicles and power plants, trees emit airborne chemicals called volatile organic compounds (VOCs), which in the presence of sunlight react with nitrogen oxides in vehicle fumes to form ozone, one of the components in smog that makes it a health threat.

They have also found components used to make DNA, the molecule that carries the instructions for how to build and regulate a living organism, as well as other biologically important molecules like nitrogen heterocycles, sugar - related organic compounds, and compounds found in modern metabolism.

(Industrial sectors such as oil and gas production don't emit ozone directly; rather, they emit compounds — such as nitrogen oxides and volatile organic compounds — that get converted to ozone in the atmosphere.)

Alien as this may seem, Titan's atmosphere — rich in nitrogen and organic compounds — may be similar to the atmosphere of early Earth.

The researchers were mixing organic nitrogen - rich compounds with nickel atoms and water.

The researchers tested a variety of solutions containing the soil bacteria Geobacter sulfurreducens and Thiobacillus denitrificans, which thrive by eating acetate (an organic compound that makes vinegar sour) and nitrate (a negatively - charged molecule of biologically available nitrogen and oxygen), respectively, when they can find a spare electron or two.

Ozone is produced by reactions involving nitrogen oxides (NOx), which come primarily from motor vehicle emissions, and volatile organic compounds resulting from industrial processes.

In the second scenario, Pfister and her colleagues found that sharp reductions in nitrogen oxides and volatile organic compounds could reduce ozone pollution even as the climate warms.

In one, emissions of nitrogen oxides and volatile organic compounds from human activities would continue at current levels through 2050.

The near - infrared mapping spectrometer on NASA's Galileo spacecraft found evidence of the presence of molecules made of oxygen, carbon, sulfur, hydrogen, and nitrogen on Europa, and a hint of the presence of a class of complex organic compounds called tholins which may be driven by pre-biotic processes (more).

The specialized instruments onboard the aircraft sampled the plume for aerosol particle size distribution and composition as well as concentrations of pollutant gases such as sulfur dioxide, nitric oxide, nitrogen dioxide, ozone, and volatile organic compounds (VOCs).

This session solicits presentations examining all aspects of air emissions and / or air quality or climate impacts of methane, volatile organic compounds, and nitrogen oxides from all stages of oil and gas development.

At the Earth's surface, we humans help create ozone, by providing the precursors like nitrogen oxides and volatile organic compounds, also called VOCs.

They replaced particular carbon atoms in the hexagonal lattice with boron and nitrogen atoms using surface chemistry, by placing suitable organic precursor compounds on a gold surface.

ORGANIC COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

Tropospheric ozone is created when the sun interacts with methane, nitrogen oxides, volatile organic compounds (VOCs) and carbon monoxide in the atmosphere.

High levels of methane leakage from fracking have been found [163], as well as nitrogen oxides and volatile organic compounds [159].

Proteins: Here is the technical definition: - Any of a group of complex organic compounds, consisting essentially of combinations of amino acids in peptide linkages, that contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur.

It's not so much the heavy metals anymore but nitrogen oxides and volatile organic compounds that are causing distress.

The researchers» analysis found organic grains and produce to have higher concentrations of antioxidants, lower levels of cadmium and nitrogen compounds and fewer pesticide residues.

Some of the worst air pollutants include nitrogen oxides, volatile organic compounds, particulate matter, carbon monoxide and carbon dioxide.

In particular, aircraft jet engines produce carbon dioxide (CO2), water vapor (H2O), nitrogen oxides (NOx), carbon monoxide (CO), oxides of sulfur (SOx), unburned or partially combusted hydrocarbons (also known as volatile organic compounds, or VOCs), particulates, and other trace compounds.

These include: plants receiving NO3 as their sole source of nitrogen (N) accumulate less organic N under elevated than ambient CO2 (refs 7,911); plants subjected to a pulse of 15N - NO3 - incorporate less 15N into organic N compounds under elevated than ambient CO2 (ref.

Garden equipment engines, which have had unregulated emissions untill very recently, emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5 % of the nation's air pollution and a good deal more in metropolitan areas.

7: Forests).18, 31,32,33,34,35 Long periods of record high temperatures are associated with droughts that contribute to dry conditions and drive wildfires in some areas.159 Wildfire smoke contains particulate matter, carbon monoxide, nitrogen oxides, and various volatile organic compounds (which are ozone precursors) 37and can significantly reduce air quality, both locally and in areas downwind of fires.38, 39,40,41,42

Formation of nitrogen - and sulfur - containing light - absorbing compounds accelerated by evaporation of water from secondary organic aerosols

Gaseous pollutants that contribute to the formation of ABCs are NOx (nitrogen oxides), SOx (sulfur oxides), VOCs (volatile organic compounds), CO (carbon monoxide), CH4 (methane), and O3 (ozone).

The new standards would reduce the volatile organic compounds and nitrogen oxides that lead to smog by 80 %, reduce particulate matter by 70 % and reduce fuel vapor emissions almost entirely.

Recalling the concern reflected in the outcome document of the United Nations Conference on Sustainable Development, entitled «The future we want», 1 that the health of oceans and marine biodiversity are negatively affected by marine pollution, including marine debris, especially plastic, persistent organic pollutants, heavy metals and nitrogen - based compounds, from numerous marine and land - based sources, and the commitment to take action to significantly reduce the incidence and impacts of such pollution on marine ecosystems, Noting the international action being taken to promote the sound management of chemicals throughout their life cycle and waste in ways that lead to the prevention and minimization of significant adverse effects on human health and the environment, Recalling the Manila Declaration on Furthering the Implementation of the Global Programme of Action for the Protection of the Marine Environment from Land - based Activities adopted by the Third Intergovernmental Review Meeting on the Implementation of the Global Programme of Action for the Protection of the Marine Environment from Land - based Activities, which highlighted the relevance of the Honolulu Strategy and the Honolulu Commitment and recommended the establishment of a global partnership on marine litter, Taking note of the decisions adopted by the eleventh Conference of the Parties to the Convention on Biological Diversity on addressing the impacts of marine debris on marine and coastal biodiversity, Recalling that the General Assembly declared 2014 the International Year of Small Island Developing States and that such States have identified waste management among their priorities for action, Noting with concern the serious impact which marine litter, including plastics stemming from land and sea - based sources, can have on the marine environment, marine ecosystem services, marine natural resources, fisheries, tourism and the economy, as well as the potential risks to human health; 1.

Nutrient enrichment of waters by release of phosphorous or nitrogen compounds (such as fertilisers) and organic matter (e.g. in effluents).

At the Earth's surface, we humans help create ozone, by providing the precursors like nitrogen oxides and volatile organic compounds, also called VOCs.

An increase of between 28,000 and 97,000 tons of volatile organic compounds plus oxides of nitrogen (VOC + NOx).

As if sweltering heat weren't bad enough, Europeans also suffered through a higher - than - normal number of days with dangerous smog levels that year.6 Smog — with ground - level ozone as the main component — forms when sunlight reacts with chemicals such as volatile organic compounds, carbon monoxide, nitrogen oxides, and water vapor.

The air pollutants include sulfur dioxide (SO2), nitrogen oxides (NOx), volatile organic compounds (VOC), carbon monoxide (CO), organic carbon (OC), black carbon (BC), and ammonia (NH3).

Automobile exhaust and industrial emissions release a family of nitrogen oxide gases (NOx) and volatile organic compounds (VOC), by - products of burning gasoline and coal.

High levels of methane leakage from fracking have been found [163], as well as nitrogen oxides and volatile organic compounds [159].

Ozone is an odorless gas that is not directly emitted into the air but is created by chemical reactions between nitrogen oxides (NOx) and volatile organic compounds (VOC)-- which occur naturally but are also produced from the burning of fossil fuels and are released in the process of drilling for oil and natural gas.

And in every case, it was determined that using these sources to create electricity for PHEVs was more efficient and created less total greenhouse gases (GHGs), volatile organic compounds (VOC), carbon monoxide (CO), nitrogen oxides (NOx), fine particulate (PM2.5) and sulfur oxides (SOx).