Known as the Gunflint Formation, its deposits are usually rust red from the oxides in them.
They promise lower emissions of nitrogen oxides, sulfur oxides, particulate matter, and carbon dioxide (CO2).
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The Navy uses Nanophase's aluminum and titanium oxides to recondition worn steering mechanisms in submarines.
And we knew very well that there were vast mountains of copper oxides out there.
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The global rare earths market is perhaps 150, 000 tonnes a year of mixed oxides.
The bus emits much less hydrocarbons, nitrous oxides and particulate matter than diesels, Fletcher said.
These nanoparticles then oxidise back into silicon oxides, drawing oxygen from the surrounding air.
Nitrogen oxides contribute to haze and form small particles that make people sick and even kill them.
According to the company it removes not just sulfur dioxide, but also carbon dioxide and nitrogen oxides.
"The marble and sandstone were being weathered by atmospheric fumes, including sulfur dioxide and nitrogen oxides, " Gopalakrashne says.
It releases nearly 500 tons each of copper and nickel oxides and 2 million tons of sulfur dioxide into the air.
These gases are then used to clean up smog-producing nitrogen oxides, or NOx.
These include the exhaust gases such as nitrogen oxides (NOx), non-methane volatile organic compounds (NMVOCs), and carbon monoxide (CO).
Dr Abrahamson believes that ball-lightning forms when a conventional lightning strike vaporises carbon and silicon oxides found in soil.
The proposal set one target for reducing nitrogen oxides from all power plants.
That dominance is threatened by tightening emissions regulations governing nitrogen oxides and particulate matter--emissions that plague diesel engines in particular.
Rust is the metal (Fe for iron) turning to the oxide (Fe2O3 normally for iron although there are other oxides).
The bacteria convert the sulphides to oxides, and the metal flows out with the acid, leaving only the sulphur behind.
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Glaze is mostly translucent, but da Vinci would also slip in small amounts of pigments, such as manganese and lead oxides.
However, it is not possible to anneal the metal oxides, an active material, at this high temperature on flexible polymer substrates.
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All over the world, since the mid-20th Century, sediments have become measurably enriched in 'reactive' nitrogen - nitrogen oxides and ammonium compounds.
The thing is that glass itself, what we use to make bottles and so on, is made of metals: but metal oxides.
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Future versions, they believe, should also be able to cope with pollutants that do not contain carbon, such as oxides of nitrogen.
They have worked with oxides of iron, aluminium, zirconium, titanium and copper.
The EPA, along with individual states, now regulates pollutants like hydrocarbons, particulate matter and nitrous oxides that are produced by cars and trucks.
This is because the waste consists of barrels of sludge containing compounds such as nitrides, oxides and water that are not, themselves, radioactive.
Most experts warn against ozone, which results from the sun heating hydrocarbons and nitrogen oxides in vehicle and industrial emissions.
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Automakers already strip lots of other pollutants from cars, such as the nitrogen oxides that contribute to smog, and carbon monoxide, which is poisonous.
It must implement regulations that capture the environmental benefits of nuclear, such as low emissions of carbon dioxide as well as nitrogen and sulfur oxides.
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The first they dealt with by coating the top of the device with oxides of hafnium, molybdenum and titanium, in layers about 100 nanometres thick.
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