Sentences with phrase «organic carbon compounds»

Much of the research has focused on microorganisms capable of immobilizing contaminants, such as uranium, after introducing organic carbon compounds, such as acetate, lactate and ethanol.

Thus they can not measure soot, mineral dust, or some refractory organic carbon compounds.

However, the toys themselves provide a source of nutrients: the plastic materials — often low - quality polymers — release substantial amounts of organic carbon compounds.

Not exact matches

For instance, if a product has carbon containing compounds, it can be classed as organic, despite containing harmful synthetic ingredients.

This environmentally responsible program improves clients» carbon footprints by reducing chemical use, volatile organic compounds, packaging waste and transportation emissions.

As plants build up organic matter, soil animals feed on them and their debris, whilst microbes decompose the complex organic compounds to their mineral components and to carbon dioxide.

«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.

iBaby Air is an indoor smart Wi - Fi air quality monitor and ion purifier that detects volatile organic compounds (VOCs) such as carbon monoxide, alcohol, and eight other elements.

iBaby Air is an indoor smart Wi - Fi air quality monitor and ion purifier that detects volatile organic compounds (VOCs) such as carbon monoxide, alcohol, and eighteen other elements.

One of the key clues will be the presence or lack of complex organic compounds — molecules featuring carbon that are both ingredients for life and potential by - products of it.

The vapor accompanying these particles was mostly water but contained trace amounts of simple organic compounds, as well as carbon dioxide and ammonia — all ingredients important for the sustenance and even origin of life.

And without organic compounds — molecular combinations of carbon and hydrogen — life as we know it is not imaginable.

Evidence for such an origin might be bolstered if scientists find signs of other materials known to be present in comets, like carbon - based compounds called organics.

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.

«The deposition of compounds such as sugars and organic acids from living roots can increase the activity of bacteria and fungi, and it's this increase in activity that accelerates the decomposition of carbon in the soil, leading to higher CO2 emissions,» Sulman said.

The organic (carbon - containing) compounds they studied in that patch of Colorado forest play a key role in atmospheric chemical processes that can affect air quality, the health of the ecosystem, and the climate itself.

Their inspiration was a compound with a molecular core consisting of a cube of eight carbon atoms studded with hydrogens, first synthesized in 1964 by Philip Eaton, an organic chemist at the University of Chicago, and his colleagues.

With its sophisticated on - board chemistry lab, Curiosity is hunting for more robust signs of habitability, including organic compounds — the carbon - based building blocks of life as we know it.

Biochemist Lars Thelander at the announcement from the Royal Swedish Academy of Sciences: «Palladium - catalyzed cross-coupling has made it possible to synthesize carbon based molecules, for example, new medicines, agricultural chemicals and organic compounds used in the electronics industry.»

With many sources of pollution in some parts of the world, however, air pollution also can contain a mix of hazardous gaseous molecules, such as carbon monoxide, formaldehyde, sulfur dioxide and other volatile organic compounds.

When converting carbon dioxide from the atmosphere into a sugar, plants use an organic catalyst called an enzyme; the researchers used a metal compound called tungsten diselenide, which they fashioned into nanosized flakes to maximize the surface area and to expose its reactive edges.

The term «organic» was originally confined to compounds produced by living organisms but now extended to include synthetic substances based on carbons and includes plastics.

Such model included meteorological factors like levels of aerosols, anthropogenic and biogenic volatile organic compounds (VOCs), ozone, carbon dioxide, methane, and other items that influence global temperature — the surface albedo among them.

Hayes and his colleagues looked at organic compounds from sediments formed between 1.8 billion and 550 million years ago, and found that simple hydrocarbons from the sediments contained more carbon - 13 than more complex organic molecules.

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.

The microbes combine the hydrogen with carbon dioxidein the water to make organic compounds.

In this case, most of the organic compounds have carbon - carbon bonds that are the most inactive.

Attendees at the astrobiology meeting in Arizona showcased an assortment of high - tech devices for next - generation exploration, ranging from microfluidic «life analyzers» and integrated nucleic acid extractors for studying «Martian metagenomics» to exquisitely sensitive, miniaturized organic chemistry labs for spotting tantalizing carbon compounds and minerals at microscopic scales.

This taste of carbon is intriguing, but it is a far cry from recent feverish speculation that the rover had found definitive evidence for organic compounds on Mars.

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.

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

The rover's science payload has the potential to identify organic carbon and other ingredients and compounds that make up the building blocks of biology.

They write, «We show that anaerobic microsites are important regulators of soil carbon persistence, shifting microbial metabolism to less efficient anaerobic respiration and selectively protecting otherwise bioavailable, reduced organic compounds such as lipids and waxes from decomposition.

Isaacman - VanWertz is particularly focused on studying the way the atmosphere interacts with organic compounds — the carbon - containing compounds that make up all living things.

The study concerns the most abundant class of carbon - based particles in the atmosphere, so - called volatile organic compounds (VOCs).

In understanding how microbes make B12 we are learning new ways of doing chemistry, for example, making carbon - carbon bonds — the essence of organic chemistry — and large ring compounds.

In chemistry, alcohol is any organic compound in which a hydroxyl group -LRB-- OH) is bound to a carbon atom, which in turn is bound to other hydrogen and / or carbon atoms.

The craft is designed to dig into the cementlike layer of ice that researchers believe lies buried a few inches below the surface in the planet's polar regions, scanning for signs of past liquid water and organic compounds, the carbon - rich molecules that make life on Earth possible.

Justin Johnson, also a senior scientist at NREL, said the process is similar to MEG, except that it uses organic molecules — compounds made from carbon — instead of semiconductors.

Their research further reveals that another organic abiotic compound is formed during the vent circulation process at adjacent lower temperature, higher pH vents, but reaction rates are too slow to completely reduce the carbon all the way to methane.

In this phenomenon, water molecules and oxygen in the atmosphere create strong oxidants which degrade organic compounds into water and carbon dioxide.

He said the Rice compound compared favorably with other carbon - capture candidates based on metal organic frameworks (MOFs).

Raindrops eject carbon - based blobs of soil material from wet fields, creating a mist of organic compounds above the soil.

These highly sensitive artificial sense organs can reliably detect gases of all kinds, from toxic carbon monoxide to carcinogenic organic compounds, and can determine their concentrations quantitatively.

As crude oil burns it releases many toxic chemicals, including lead, carbon monoxide, polycyclic aromatic hydrocarbons and volatile organic compounds, says Bin Jalaludin at the University of New South Wales in Australia.

Intriguingly, radioactive carbon was detected, but then another experiment found no evidence of organic compounds in the soil — there were no alien bodies.

Each time the chemists add a head, body or tail to a sample of beads, they also attach simple organic compounds called ketones containing carbon atom chains of varying lengths.

On the other hand, the chemoautotrophic hypothesis posits that iron sulfide reactions released hydrogen, which combined with carbon dioxide in the atmosphere to form organic compounds.

Clearly even nature has not managed to really utilize the energy of the sun, a fact that is perhaps not surprising considering the complex biochemical apparatus it has to marshal in its goal of synthesizing equally complex carbon - based organic compounds.