Sentences with phrase «contain organic carbon»

Most pieces of rock art, painted in red, brown or yellow ocher — a hydrous iron oxide — contain no organic carbon.

What's more, interplanetary dust in our solar system — and in others — contains organic carbon.

Not exact matches

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

The blackish water contained some accumulated solids and carbon residue within permitted limits and did not include any organic type oils or solvents.

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.

A molecular cloud is an interstellar cloud of dust, gas, and a variety of molecules ranging from molecular hydrogen (H2) to complex, carbon - containing organics.

Permafrost contains a legacy of past climate, storing organic carbon in frozen soil.

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 U.S. Geological Survey estimates that methane locked in ice (known as hydrates) could contain more organic carbon than all the world's coal, oil, and nonhydrate natural gas combined.

From remote observations, the team assumes that Bennu should contain water and organic — or carbon - rich — material, but they don't know yet how this material is distributed across the surface.

Carbonaceous PM is made up of black carbon, primary organic aerosol (POA) and, especially, secondary organic aerosol (SOA), which is known to contain harmful reactive oxygen species and can damage lung tissue.

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.

One involves organic molecules — not the pricey kind from Whole Foods, but molecules that contain carbon.

Photo credit: DRIChakrabarty and colleagues found to their surprise that funeral pyre emissions contain sunlight - absorbing organic carbon aerosols known as brown carbon.

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.

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.

The data come from deep - sea sediment cores dating to 205 million years ago that contain inorganic carbon - rich minerals as well as the organic remains of single celled marine phytoplankton.

We have shown that hydrothermal vent fluids contain almost none of the organic carbon which accumulates in the oceans, which means that vents are a sink for this unreactive «stored» carbon.»

After some trial and error, the team designed a structure that worked: a metallo - organic case containing both metal ions and a carbon backbone surrounding a spherical molecule called bicyclooctane.

Comets contain abundant organics — carbon - based molecules that are not necessarily formed from life.

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 river plume containing terrestrial dissolved organic carbon can be seen as dark regions in the Atlantic Ocean.

Metal - organic frameworks are two - dimensional structures that contain cobalt, sulfur, and carbon atoms.

Because they are so abundant, and because they contain various biomolecules, these vesicles constitute a significant source of organic carbon, nitrogen, and phosphorus on which other organisms might feed.

These wetland ecosystems contain live vegetation at the surface, but house extensive stores of dead, carbon - rich organic matter underground.

According to her, the research included four of the five functionally distinct carbon pools whose study is recommended by the United Nations (UN) Intergovernmental Panel on Climate Change (IPCC): aboveground biomass (live plants), dead organic matter, leaf litter (layer that contains a combination of fragments of leaves, branches and other decomposing organic matter) and soil (up to 30 centimeters (cm) in depth).

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.

Despite these hurdles, several years ago the team discovered chlorobenzene, a ring - shaped molecule containing six carbons, along with other chlorinated organics, using a sample from a mudstone Curiosity drilled at Yellowknife Bay near its landing site in Gale crater.

«These superdeep diamonds contained much less carbon - 13, which is most consistent with an origin in the organic component found in altered oceanic crust.»

In 2005, Cassini spotted geysers blasting from Enceladus» southern reaches, and when the spacecraft passed through the spray, it detected water and carbon - containing organic compounds.

The team injected citric, adipic, and fulvic acid into the chamber as seed aerosols, and then introduced a secondary organic aerosol from α - pinene, a carbon - containing compound derived from pine trees.

The largest portion of these submicron aerosols is organic, or carbon - containing, and is classified as two kinds: primary and secondary.

Possible mechanisms include (iv) fertilization of phytoplankton growth in the Southern Ocean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient exported.

Methylene is the simplest member of a class of organic molecules known as carbenes, which contain an atom of carbon only bonded to two other atoms, in this case, a pair of hydrogen atoms.

Previous flybys through the plumes have revealed that they contain water vapor, ice particles, sodium, potassium, methane, carbon monoxide, carbon dioxide and nitrogen, as well as both simple and complex organics.

These have garnered more than 600 citations advancing our understanding of what the research field calls secondary organic aerosols — or SOA for short — and how the carbon - containing aerosol particles mix in the atmosphere.

The report says the water «in and around the Union Carbide factory site in Bhopal still contains extremely unsafe levels of carbon tetrachloride and other persistent organic pollutants, solvents, nickel and other heavy metals».

Most of the molecules are organic (carbon - containing), including ones similar to Earth - like molecules but still others that are a strange assortment of species that could never be stable on Earth.

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.

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