Sentences with phrase «nitrogen compounds»
"Nitrogen compounds" refers to chemical substances that contain nitrogen atoms. These compounds can be found in many forms such as gases, liquids, or solids, and they play important roles in various biological and industrial processes. Examples of nitrogen compounds include ammonia, nitric oxide, and proteins, which are essential for life. Full definition
Our research focuses on understanding the chemistry of organic nitrogen compounds in the atmosphere.
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But the pollution from diesel engines is mainly nitrogen compounds.
A second factor makes nitrogen compounds explosive: the newly formed nitrogen molecules form a gas, which can expand very quickly and form a shock wave.
They can use only nitrogen compounds such as ammonia.
N2O emissions from soils are due to the unproductive loss of mobile N. Any nitrogen input (mineral and organic fertilizers, biologically fixed N, crop residues) and also the mineralization of nitrogen compounds in soils rich in organic matter contribute to the emission of N2O.
In nature, only one enzyme — bacterial nitrogenase — can achieve the same reaction, but without emitting excess nitrogen compounds into the environment, or in other words, leaching of nitrates into groundwater.
Lactic acid bacteria need organic nitrogen compounds for growth.
«This indicates that as atmospheric carbon dioxide concentrations rise and nitrate assimilation in plant tissues diminishes, crops will become depleted in organic nitrogen compounds, including protein, and food quality will suffer,» Bloom said.
The goal is to get as near as possible to the water coming out from under the crust because that's how we'll best learn whether that water has complex organic molecules, nitrogen compounds needed for life and possibly life itself.»
The amount of nitrogen that falls on ecosystems has more than doubled since the 1960s, fed by nitrogen compounds from fossil fuel burning and ammonium in manure and fertilizers (Science, 13 February, p. 988).
You could argue [on] the climate change [one], but [on nutrient] pollution we have used so much [fertilizer] and so much nitrogen compounds are loose in the environment, it is hard to recognize our coastal oceans anymore; of the species that are gone [and] that kind of thing.
Species known as mycorrhizal fungi use their mycelia to envelop or penetrate plant roots, contributing nitrogen compounds and mineral salts in exchange for sugars from the host organism.
When these two food groups are combined, the reaction of unsaturated fatty acids with nitrogen compounds in the vegetables results in the formation of nitro fatty acids.
NOx gases are produced in oxygen - poor soils when microbes break apart nitrogen compounds in the fertilizer, a process called denitrification.
Beijing has been battling an unwelcome, unrelenting and «very unhealthy» smog for many months, much of it made up of particulate nitrogen compounds suspended in the air.
Yale University scientists may have cracked a part of the chemical code for one of the most basic, yet mysterious, processes in the natural world — nature's ability to transform nitrogen from the air into usable nitrogen compounds.
Further, the findings of this study of the North Pacific highlight the need for greater controls on the emission of nitrogen compounds during combustion and agricultural processes.
Editor's Note: The EPA report discusses reactive nitrogen compounds, not the inert nitrogen gas found in the atmosphere.
Decreasing concentrations of dissolved iron do not coincide with the occurrence of oxygen but with the increase of dissolved nitrogen compounds.
Moreover, airborne nitrogen compounds that are produced by agriculture, transportation, and other industrial sectors can fertilize nearby forests, thereby removing CO2 from the atmosphere.
In their press release from Friday they announce they have created a database [which seems not always to work] with updated data on current emissions sources, not just for CO2 and methane, but also for various nitrogen compounds and for instance soot — that most - ignored climate forcer.
My research activity consisted of collecting soil samples from different areas of the Mississippi River and investigating the behavior of nitrogen compounds in the special conditions of flooded soils.
«Harmful materials like sulphur compounds, metals, nitrogen compounds that will end up producing harmful gases or solids, we leave them there and just extract a good quality oil,» Pereira - Almao, AICISE's co-director, explains in a video posted on the research institute's website.
These include antibacterials, commercial waterproofers, nanoparticles used as waterproofing or antibacterial agents, polyurethane, synthetic latex, vinyl, and antimony, phosphate and nitrogen compounds (flame retardants).
LA's smog is caused by sunlight driving chemical reactions between oxygen, nitrogen compounds and hydrocarbons in the lower atmosphere.
Nitrospinae bacteria, which use the nitrogen compound nitrite to «fix» inorganic carbon dioxide into sugars and other compounds for food and reproduction, are responsible for 15 to 45 percent of such carbon fixation in the western North Atlantic Ocean, researchers report in the...
Auto parts manufacturers use it in the catalytic converters that break down nitrogen compounds and other pollutants from engine exhaust.
Emissions of nitrogen compounds, however, have not fallen as steeply.
Vertical and horizontal distribution of oxygen, nitrogen compounds and iron in seawater in the oxygen minimum zone off Peru.
'' facilitating the removal of harmful metabolic by - products such as lactic acid and nitrogen compounds
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.
The Ministry has added two nitrogen compounds, Nitrous oxide, a potent greenhouse gas with an effect 300 times greater than carbon dioxide; and ammonia, to previous sulphur dioxide and water pollution targets.
Nitrous Oxide is produced when bacteria breakdown the nitrogen compounds in soils and the oceans.
Changes in chemistry effect the production of ozone and nitrogen compounds, the lifetime of CFCs, and probably cloud formation.
Nutrient enrichment of waters by release of phosphorous or nitrogen compounds (such as fertilisers) and organic matter (e.g. in effluents).
The presentation links the production of the nitrogen compounds that degrade ozone to change in the AP geomagnetic index.
AUTHOR»S NOTE: Carbon dioxide, methane, CFCs, HFCs, and nitrogen compounds are the main focus of international attempts to lessen the chemical effects of anthropogenic global warming caused by greenhouse gas pollution.
Hydrotreating includes desulfurization, removal of substances (e.g., nitrogen compounds) that deactivate catalysts, conversion of olefins to paraffins to reduce gum formation in gasoline, and other processes to upgrade the quality of the fractions.
The more efficient end - of - pipe pollution control is at capturing metals and fly ash and sulfur or nitrogen compounds, the greater the chance that the resulting residues will be classified as hazardous due to metals (from a regulatory standpoint).