Sentences with phrase «hydrogen atoms from»

Another production method is called chemical vapor deposition, or CVD, and that's where scientists take a gas of hydrocarbons along with a metal catalyst and are able to remove the hydrogen atoms from the hydrocarbon, then keep only the carbon atoms and then hopefully these carbon atoms kind of arrange themselves side by side into this graphene lattice form.

An atmospheric water molecule can be broken apart by sunlight, releasing the two hydrogen atoms from the oxygen atom that they had been bound to.

Electrical engineers Joseph Lyding and Mark Hersam of the University of Illinois developed a technique for plucking single hydrogen atoms from a silicon sheet, which may lead to a millionfold increase in the number of transistors that can be packed onto a chip.

For example, instead of stealing an electron from double - bonded carbons or a nearby propagating chain, the carbon atom with the free radical sometimes steals an entire hydrogen atom from another chain end.

The methyl - nickel molecule exists temporarily, until the methyl in its turn steals a hydrogen atom from another molecule in the enzyme's workspace, coenzyme B, and becomes methane.

Hungry and irritated, the methyl radical immediately snags a hydrogen atom from coenzyme B, generating methane.

High PI and DBI equals short lifespan MLSP despite mitochondrial Glutathione and Thioredoxin trying its best to scavenge membrane Hydroperoxides formation from hydroxyl radical stealing hydrogen atom from unsaturated fatty acids (initiating lipid peroxidation propagation forming highly mutational reactive aldehydes (MDA, MDA - TBARS), alkenals (4 - HNE), methylglyoxals (creating glucosepane, MDA - Lys, CML, pentosidine, CEL, furosine from Amadori).

The scientists correlated the various peaks observed in the NMR spectra with the catalysts» reactivity for an oxidation reaction that removes a hydrogen atom from methanol.

Not exact matches

Scientists can determine where an individual piece of meat comes from using a technique called isotope analysis, looking at the specific fingerprints of carbon, hydrogen, and nitrogen atoms to see where a cow lived.

They don't take the sugar compound from their placebo, randomly switch out one carbon atom for a hydrogen atom, run a split test, and hope for the best.

Meanwhile, science can characterize the content of deuterium (a hydrogen nucleus with a proton and a neutron) to the usual quality limits by looking at a spectra from 1000 hydrogen atoms.

For example, what must be the nature of physical existents such that the composite, the molecule of water, not only consists of one oxygen atom and two hydrogen atoms, but that they are at a particular distance from each other and in a particular three - dimensional pattern?

Processing towards life is my metaphor for cosmic evolution from a relatively undifferentiated universe right after the big bang, for example a universe consisting of hydrogen atoms only.

For example, the presence of hydrogen and methane are clues that the chemical environment of the fluid in which the diamond crystallized was one in which the metal atoms could easily gain electrons and disengage from carbon atoms.

Due to the high temperatures and intense radiation present, these atoms initially existed in an «ionized» state: The negatively charged electrons had been stripped from positively charged protons, leaving behind positive hydrogen ions (essentially, just protons).

The emergence of chemistry had a transformative effect on the universe because of a peculiar property of atomic hydrogen: If you take a big cloud of hydrogen atoms and let it collapse, it gets hotter and hotter until all the bound - up energy keeps it from shrinking any further.

If high - energy particles from deep space, called cosmic rays, happened to hit one of those hydrogen atoms, it became ionized, stripped of its electron.

Nevertheless, a team from the University of Copenhagen's Department of Chemistry has managed to become the first to bond positively charged phosphorus atoms with positively charged hydrogen ones.

The palladium atoms initially snatch hydrogens from the alcohols but later give them up to oxygen atoms in the solvent, generating water and returning the catalyst to its original state.

Their theory showed how a film of negatively charged electrons covering the palladium could combine with positively charged protons from the water's hydrogen atoms to form neutrons.

Theorists had predicted that about one in 10,000 of the solar wind's protons would snatch an electron from a passing neutral atom to become a neutral hydrogen atom itself.

Radiation from those early sources would have heated up those hydrogen atoms before it fully liberated the electrons.

Molecular «cages», crystals made from chains of carbon, oxygen and hydrogen atoms, are one solution.

Such views suggest that tiny galaxies in the early universe played a crucial role in cosmic reionization — when ultraviolet radiation stripped electrons from hydrogen atoms in the cosmos.

Graphene doped with nitrogen and augmented with cobalt atoms has proven to be an effective, durable catalyst for the production of hydrogen from water, according to scientists at Rice University.

Accordingly, the vast, cloud - like objects that glow with this light from hydrogen (and other) atoms are known as emission nebulae.

In the future, Goulielmakis hopes to produce light pulses of 24 attoseconds, the atomic unit of time, defined as how long it takes an electron to travel from one side of a hydrogen atom to the other.

The fullerene cages prevent water molecules from freezing, meaning that the hydrogen atoms continue to spin and conversion is still able to occur.

The lander would refuel on the space station, and would utilize liquid hydrogen fuel, which would come from water molecules broken into their composite oxygen and hydrogen atoms.

Scientists are using a pioneering method of «caging» and cooling water molecules to study the change in orientation of the magnetic nuclei at the centre of each hydrogen atom — a process which transforms the molecule from one form of water to another.

Instead of searching for the light from individual galaxies with an optical telescope, the team stalked a different quarry, red - shifted radio waves emitted by hydrogen atoms floating in huge clouds within the galaxies.

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.

EDGES, which measures the total amount of radiation from hydrogen atoms over a large swathe of the sky, can not image the gas in detail.

Next, a photoredox catalyst strips a hydrogen atom equivalent from the carbon, and the thiol engages in radical chemistry to transfer the deuterium or tritium in its place.

Triarylmethanes are a group of compounds that derive from methane (a molecule consisting of carbon with 4 hydrogen atoms attached to it) and consist of a carbon atom center with 3 aryl (aromatic ring) groups and a hydrogen atom.

PRMT stands for «protein arginine methyltransferase,» and PRMT enzymes facilitate the chemical process of arginine methylation, the fastening of a methyl group (made from one carbon and three hydrogen atoms) to proteins inside cells.

Cerkovnik and Plesnicar proved that they had made hydrogen trioxide from the nuclear magnetic spectrum of the solution, which revealed a signal that could only come from the hydrogen atoms of hydrogen trioxide.

New observations show that tiny galaxies in the early universe could have triggered the epoch of reionization — a period when harsh radiation tore apart hydrogen atoms — which astronomers consider key to understanding how stars and galaxies arose from the universe's early dark void.

In the experiment, plastic simulates compounds formed from methane — a molecule with just one carbon bound to four hydrogen atoms that causes the distinct blue cast of Neptune.

Odorants such as acetophenone and deuterated acetophenone, for example, have the same molecular structure; one is just built from a slightly heavier hydrogen atom, known as deuterium.

Graphene can be transformed from a conductor to an insulator by exposure to hydrogen atoms and reversed by a thermal treatment.

The red color represents spectral line emission from hydrogen atoms.

Again, the first one stripped off hydrogens from adjacent carbon atoms in both the long polyethylene chains and short alkanes to form double bonds; the second split the molecules and randomly stitched split molecules back together.

Now, oddly, a pair of physicists has found that the same formula emerges from a routine calculation in the physics of the hydrogen atom — the simplest atom there is.

The energetic radiation from these new stars strips electrons from the atoms within the surrounding hydrogen gas, ionising it and producing a characteristic red glow.

At that time, an obscuring fog of neutral hydrogen atoms was being burned off by radiation from the first stars and galaxies, and possibly also from the annihilation of dark matter particles.

«The presence of nitrogen and carbon atoms in the vicinity of the catalytic molybdenum center facilitates the production of hydrogen from water,» Muckerman said.

As the starshine intensified, it eventually stripped electrons from the hydrogens, ionizing the atoms.

What they couldn't figure out — what nobody has yet figured out — is where those original hydrogen atoms came from.

When the team of geologists from Stanford University re-created these conditions in a lab to try to duplicate an ultralow - velocity zone, they found that iron — one of the more abundant minerals on Earth and a likely candidate material that might explain the zones — reacted with the seawater to create a form of iron peroxide that was saturated with hydrogen atoms, according to the new research.