Sentences with phrase «form of organic compounds»

Not exact matches

All of these scientific hypotheses boil down to first there was an planetary mass covered with water and providing the correct conditions for chemical reactions to create a simple organic compound from which life was formed.

Harmful gaseous pollutants in the form of volatile organic compounds are often released into the air when chemicals are used, for example in cleaning products.

The acids form when organic, carbon - containing compounds and water are zapped with a source of energy, such as photons — a process that can take place on Earth or in space.

This liquid - like ice may enhance the formation of organic compounds including prebiotic molecules and the accretion of dust to form planets.

In doing so, they were able to fill in significant gaps in the inventory of organic compounds in the atmosphere, finding that about a third of them were in the form of previously unmeasured semi-volatile and intermediate - volatility organic compounds (SVOCs and IVOCs).

Much of this haze is formed from volatile organic compounds, or VOCs, and fine particulate matter from tailpipe emissions.

According to him, between 75 % and 80 % of the mass of nanoparticles measured in this study corresponds to organic compounds (carbon in different forms) emitted by motor vehicles.

Cyanobacteria, which still exist in a similar form today, probably started using energy from sunlight to photosynthesize some of the carbon dioxide in the atmosphere into organic compounds.

Higher temperatures can also increase the emissions of organic compounds from trees, which can then react in the atmosphere to form ozone and particulate matter.

Polymeric carbon nitrides are organic compounds synthesized to form a yellow powder of a myriad of nanocrystals.

However, Sagan and Christopher Chyba believe organic compounds, formed at high altitudes by the action of solar ultraviolet radiation on methane and ammonia can provide an ultraviolet «shield» to protect the methane and ammonia in the lower atmosphere.

These complex organic molecules, two forms of cyanide and one chemically related compound, likely formed after the protoplanetary disk collapsed, the researchers say.

Complex organic compounds and things that look a lot like bacterial shapes form readily, without the hand of biology.

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.

Finding out how methane and other organic species are formed in deep - sea hydrothermal systems is compelling because these compounds support modern day life, providing energy for microbial communities in the deep biosphere, and because of the potential role of abiotically - formed organic compounds in the origin of life.

The form of mercury in thimerosal — an organic compound called ethyl mercury — is the least studied of all mercury's incarnations.

Nitrogen - containing compounds of this sort are especially interesting because they may have played a role in forming organic compounds involved in the origin of life.

«Instead, the presence of such organic compounds in the sediments are linked to import of large amounts of methyl mercury formed in the surrounding soils and wetlands,» explains Stefan Bertilsson, Professor at Uppsala University.

While other species detected in space are formed by gas - phase chemistry alone, or by a combination of both gas and solid - phase generation, methanol is a complex organic compound which is formed solely in the ice phase via surface reactions on dust grains.

The next step in the hunt for life on Mars is getting a better grip on the prevalence (or lack thereof) of organic compounds on the surface and in the atmosphere — and then actually digging down into the crust of the Red Planet, to look for actual signs of life, either in the form of fossils or actual living microorganisms.

They usually take the form of chloroplasts, which like cyanobacteria contain chlorophyll and produce organic compounds (such as glucose) through photosynthesis.

The equatorial and temperate regions of Titan have vast areas of dunes formed by windblown sand rich in organic compounds.

This way, the volatile organic compounds that make the tea so powerful don't escape in the form of steam.

Of particular note are Deacon's early drawings It's Orpheus When There's Singing (1978): a suite of drawings built up from complex compound curves that influenced the organic forms of much of his subsequent sculpture, and the large, sixty - part, green ceramic sculpture Fold (2012Of particular note are Deacon's early drawings It's Orpheus When There's Singing (1978): a suite of drawings built up from complex compound curves that influenced the organic forms of much of his subsequent sculpture, and the large, sixty - part, green ceramic sculpture Fold (2012of drawings built up from complex compound curves that influenced the organic forms of much of his subsequent sculpture, and the large, sixty - part, green ceramic sculpture Fold (2012of much of his subsequent sculpture, and the large, sixty - part, green ceramic sculpture Fold (2012of his subsequent sculpture, and the large, sixty - part, green ceramic sculpture Fold (2012).

The standards we recommend in this report would also significantly reduce emissions of other air pollutants, specifically smog - forming volatile organic compounds and toxic pollutants like benzene that cause cancer and are associated with a host of other health problems.

Various Updates In a move that environmental campaigners had sought for years (as had I), the Environmental Protection Agency has issued final rules that could substantially cut emissions of heat - trapping methane, smog - forming volatile organic compounds and toxic air pollutants such as benzene from new, rebuilt or modified oil and gas wells and other infrastructure and operations.

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.

Volatile organic compounds or VOCs are produced from solids and liquids in the form of a gas.

Aerosol «blue haze», as seen here in the Great Smoky Mountains in North Carolina, is formed by the oxidation of volatile organic compounds emitted by trees.

The H2SO4 can then condense together with water vapor (and perhaps organic compounds and / or ammonia) to form a stable cluster of molecules: A new particle is typically 1 - 2 nanometers in diameter.