Sentences with phrase «carbon and hydrogen»

The oil and fat in food consist of fatty acids, which are chains of carbon and hydrogen atoms.

They make good fuels because the energy stored in the bonds between carbon and hydrogen is abundant and easy to release in combustion with oxygen.

It has been used for almost a century to create liquid fuels, which are made of long chains of molecules containing only carbon and hydrogen.

Coal, for example, is mostly carbon, while petroleum — which includes oil and natural gas — is mostly carbon and hydrogen.

Coal is a mixture of carbon and hydrogen, with the emphasis on the former; methane, the main component of natural gas, consists of one carbon atom and four hydrogen atoms.

fatty acid A large molecule made of up chains of carbon and hydrogen atoms linked together.

These elements helped to carry out CH - activation, i.e. to break the bond between carbon and hydrogen in molecules and to create a new carbon - carbon bond and thereby obtain new promising substances.

The method takes advantage of varying levels of carbon and hydrogen isotopes in the soil, water, and vegetation at different latitudes.

The team looked at the alignment of the spins of carbon and hydrogen nuclei in molecules of methyl iodide.

Instead, Wang and his colleagues identified a relationship between a feature of the bonds linking carbon and hydrogen in methane molecules — a quality they deemed «clumpiness» — and the rate at which methane was produced: The clumpier the bond, the slower the rate of methanogenesis.

Hydrocarbons are molecules that only contain carbon and hydrogen molecules.

By conducting experiments at the Linac Coherent Light Source — one of the world's most powerful X-ray lasers — an international team of researchers led by HZDR physicist Dr. Dominik Kraus was able to demonstrate that hydrocarbon compounds split into carbon and hydrogen inside ice giants such as Neptune, shown here.

(Organic molecules contain carbon and hydrogen, and often include nitrogen, oxygen and other elements important to life on Earth.)

The elements carbon and hydrogen both have different isotopes, or variants, present in all living things, and the exact mix of isotopes varies by region; for example, the mixture found in central Illinois is different from that found in Texas.

«The large - scale differences in the structures and transmission characteristics of these proteins — caused by what amounts to seemingly insignificant differences in the positions of a few carbon and hydrogen atoms — are quite remarkable,» Jaroniec said.

Researchers captured monarchs from across 17 states and two Canadian provinces, before analyzing carbon and hydrogen isotopes in their wings to find out where the insects came from, said Tyler Flockhart, a biologist at the University of Guelph in Ontario.

These chloroplasts — diminished descendants of the first photosynthesizers, cyanobacteria — use incoming sunlight to split water molecules and then knit together the energy - rich carbon and hydrogen compounds found in everything from food to fossil fuels.

Since expanded polystyrene is made only from carbon and hydrogen, casting of expanded polystyrene is extremely clean.

A single addition or subtraction of a few carbon and hydrogen ions can determine the silencing of a tumor suppressor gene or the overexpression of an oncogene.

A low - pressure method, developed in the 1980s, forms a thin diamond film by shooting a current through carbon and hydrogen gases, but the results are impure.

At the American Physical Society meeting in March scientists reported that our makeup of complex molecules based on carbon and hydrogen is no fluke and that precursors to terrestrial life's distinctive chemistry apparently abound in distant space.

A new catalyst for breaking the tough molecular bond between carbon and hydrogen holds the promise of a cleaner, easier and cheaper way to derive products from petroleum, says a researcher at Southern Methodist University, Dallas.

Because the isotopic ratios of carbon and hydrogen display geographic variation, the composition of a feather can reveal where the bird was when the feather grew.

Taleyarkhans group used an organic chemical called acetone, an ingredient in common nail - polish remover, because it is rich in neutron - absorbing carbon and hydrogen atoms.

The white, yellow, and orange colors reflect the increasing temperatures of soot within the flame, while blue is the glow of excited carbon and hydrogen bonds as the paper burns.

They inserted grains of naphthalene and biphenyl — two toxic, carbon and hydrogen bearing compounds believed to exist on Titan's surface — into a small cylinder.

Improving our understanding of how and when mixtures of carbon and hydrogen separate under extreme conditions also is relevant for inertial confinement fusion (ICF) experiments.

Enzymes attach carbon and hydrogen bundles (CH3) called methyl groups to the DNA, often near the beginning of a gene — the same place where proteins attach to activate the gene.

Its main natural sources are tropical and boreal wetlands, ruminant animals and biomass burning, all of which have different isotopic signatures for carbon and hydrogen.

Evidence is mounting that petroleum is abiogenic in origin — and natural forces deep inside the Earth are constantly creating new hydrocarbons from elemental carbon and hydrogen.

The solid oxide fuel cell under the coals then converts carbon and hydrogen into electricity, and is described as a sort of reverse photosynthesis:

The team looked at the alignment of the spins of carbon and hydrogen nuclei in molecules of methyl...

Diamondoids are interlocking cages made of carbon and hydrogen atoms.

Hydrocarbons are regarded as building blocks of life, combining the elements carbon and hydrogen to give rise to millions of different chemical compounds.

Scientists from Tomsk Polytechnic University together with their colleagues from USA and Japan have proposed a novel way to address the most important and fundamental challenge of organic chemistry, i.e. breaking a bond between carbon and hydrogen atoms to form new organic substances.

It turns out that this inconsistency can be explained by a previously unknown relationship between a feature of the bonds linking carbon and hydrogen in methane molecules, and the rate at which methane was produced.

I understood that the early stage of the Integrated Gasification Combined Cycle (IGCC) process separates the coal into carbon and hydrogen.

Organic arsenic contains carbon and hydrogen.

The chemical industry must break the tenacious bond between carbon and hydrogen molecules to synthesize oxidative products such as methanol and phenols.

A study published in Proceedings of the National Academy of Sciences shows that a wax - like hydrocarbon — a chemical consisting of only carbon and hydrogen atoms called heneicosane — on the body surface of subterranean royal termites is used to enable worker termites to recognize and care for them.

Estimates relied on measurements of forms of carbon and hydrogen in leaf wax recovered from ocean sediment cores collected off the Sahara's west coast.

It consists of a string of three hexagonal rings of carbon and hydrogen atoms with a sulfur atom attached to either side of the middle ring.

Comprised of carbon and hydrogen, in closed growing environments, like on a spacecraft or in a terrestrial greenhouse or a land - base perishable cooler, ethylene builds up rapidly and causes plants to mature too quickly.

But most of today's plastics are made of hydrocarbon molecules — packets of carbon and hydrogen — derived from the refining of oil and natural gas.

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

In this case, the scope's tip supplies an electric charge to carbon and hydrogen atoms that extend outward and act like a kind of propeller.

A main advantage to the catalysts, which oxidize bonds between carbon and hydrogen, is that they preserve the amino acid's sense of chirality.

The best - studied form of epigenetic regulation is methylation, the addition of clusters of atoms made of carbon and hydrogen (methyl groups) to DNA.

To this carbon and hydrogen backbone, they added branches made of benzene rings and nitrogen, as well as carbon and hydrogen, producing a tree - like structure.