Sentences with phrase «of nitrogen atoms»

Also of note is this answer on the physics stack exchange which says that the blue color of air sparks comes from ionization of nitrogen atoms.

To manufacture it, tightly bound pairs of nitrogen atoms must be split and then recombined with hydrogen.

The distribution of nitrogen atoms after the dissociation allowed the identification of the «active sites» for this reaction, which are formed by the low - coordinated, top metal atoms of atomic steps.

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.

If you watched an atom of carbon 14 undergo beta decay to an atom of nitrogen 14, what was the cause for that atom of nitrogen 14?

These acids in turn are merely complex chains of atoms (carbon, hydrogen, oxygen, nitrogen).

The weight of an atom of nitrogen was well known.

Two experimenters, the late Lord Rayleigh and the late Sir William Ramsay, found that if they obtained nitrogen by two different methods, each equally effective for that purpose, they always observed a persistent slight difference between the average weights of the atoms in the two cases.

Nitrates consist of three oxygen atoms and one nitrogen atom.

Carbon - 13, one tracer used to probe a variety of geochemical processes, is typically formed when high - energy cosmic rays enter the atmosphere and strike the most abundant form of nitrogen there — nitrogen - 14 atoms.

There are basically two types of lines, those produced by collisions between the atoms or ions and the electrons in the surrounding gas, which are called collision lines, and which are very bright for elements such as oxygen, nitrogen and neon, and lines which are produced when ions capture free electrons, which are called recombination lines, and which are bright only for those gases with the highest abundances in the interstellar medium: hydrogen and helium.

The isotope has a half - life of approximately 5,600 years, which means that during this period, half the number of radioactive carbon atoms in any once - living substance will convert to nitrogen.

Other elements — typically oxygen, nitrogen, and hydrogen — frequently join that carbon spine, and the choice and arrangement of those atoms produces specific varieties of polymers.

For example, a few nitrogen atoms among a diamond's millions of carbon atoms can make the rock appear yellow or brown, while blue diamonds have been besmirched with a few boron atoms.

They always hook up with other atoms, and the covalent bond between two nitrogen atoms is among the strongest of its kind.

Like hydrogen, oxygen, and iodine, nitrogen normally exists as two - atom molecules in the form of a gas at room temperature.

The atomic size and structure of nitrogen make it an excellent choice for this purpose because it can fit naturally into a strong network of carbon atoms by creating bonds (sp2) in which electrons are shared by the whole network.

The widely separated cobalt atoms are bound to a sheet of nitrogen - doped graphene.

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.

Every protein consists of a long chain of joined - together amino acids, which are small molecules made up of atoms of carbon, oxygen, nitrogen, sulfur and hydrogen.

But at high pressures and temperatures above 3,140 degrees Fahrenheit, nitrogen atoms transform into a polymer, a chain of single - bonded atoms.

Two nitrogen atoms combine to form N2 molecules that stay in the atmosphere for millions of years.

In parallel work, Mikhail Eremets of the Max Planck Institute for Chemistry in Germany found a novel bond between atoms of nitrogen, the most common element in Earth's atmosphere.

By raising the temperature to 85 °C and adding more hydrogen, the researchers got some of the paired nitrogen atoms to add two more hydrogens; then, each nitrogen atom left its partner completely to form ammonia (NH3).

The zirconium sapped the loyalty of the electrons bonding the nitrogen pairs, weakening the link between the two atoms and letting hydrogen weasel in and latch onto the nitrogen.

The team took a simple molecule — consisting of a benzene ring with a small nitrile arm of carbon and nitrogen and with two iodine atoms attached, one above and one below.

The scientists found that the reaction on Fe - ZSM - 5 is based on adsorption of nitrogen monoxide via a positively charged oxygen atom.

Baking that at 750 degrees Celsius (1,382 degrees Fahrenheit) in the presence of nitrogen and hydrogen gas reduced the graphene and locked nitrogen atoms to the surface, providing sites where ruthenium atoms could bind.

«Those electrons are driven into the upper atmosphere, collide with nitrogen and oxygen atoms and molecules, and then create a spray of secondary and tertiary radiation, likely in the form of gamma rays,» Tobiska says.

The research team created four variants of the engineered molecule, each of which contained a PBA molecule with a different chemical modification, such as an atom of fluorine and nitrogen.

«Ruthenium is often a highly active catalyst when fixed between arrays of four nitrogen atoms, yet it is one - tenth the cost of traditional platinum,» Tour said.

By focusing on nitrogen atoms, Timothy A. Cross of Florida State University and his co-workers were able to determine exactly how M2 functions.

On the central tree, the ants were fed with an amino acid — glycine — where the nitrogen atom consisted of the heavier nitrogen 15 (15N).

Typically, and logically, a positively charged hydrogen atom bonds to a negatively charged atom of oxygen, nitrogen or fluorine.

Approximately 75 percent of compounds with medicinal uses have a nitrogen atom.

In this case, doping refers to introducing nitrogen atoms into the carbon structure of graphene.

These nitrogen atoms, although they are not part of the graphene, can dope the lattice without destroying it.

They investigated samples of the carbon compound enriched with the foreign atom nitrogen on various substrate materials.

The nitrogen - vacancy (NV) center is a defect in the atomic structure of a diamond where one carbon atom in the diamond lattice is replaced by a nitrogen atom, and an adjacent site in the lattice is vacant.

Hexagonal boron nitride, stacked layers of boron and nitrogen atoms arranged in a hexagonal lattice, has recently been found to bend electromagnetic energy in unusual and potentially useful ways.

This is how the identification of smallest magnetic fields with diamond sensors works: in the tiny diamond tip, two adjacent carbon atoms are being removed and one of the resulting vacancies is replaced by a nitrogen atom.

On a yellow pad, Blackwell draws a portrait for me of a prototypical quorum - sensing signal molecule: a ring of carbon atoms attached to some hydrogen, nitrogen, and oxygen atoms, trailing off in a long tail composed of more carbon atoms.

In air, nitrogen exists as a molecule made of two atoms stuck together by an incredibly strong triple bond.

Less energy is needed to break these bonds, and once they are broken, atoms of nitrogen are free to form triple bonds with each other.

The six nitrogen atoms are at the corners of an octahedron around the Fe atom.

The final, prolonged emission was from the breakdown of now neutron - poor and unstable nitrogen atoms.

In the study the researchers have modified the graphene by replacing some of the carbon atoms by nitrogen atoms.

Haem, for example, consists of four pyrrole - type rings joined by carbon bridges to form a larger ring system called a macrocycle which consists of 20 carbon atoms and 4 nitrogen atoms.

Also, the supernova's light spectrum shows the presence of forms of carbon, nitrogen, and oxygen atoms that are considered unprecedented.

Many members of the team had previously reported uranium nitride and oxo complexes where the molecules are essentially the same except for swapping a single nitrogen atom for an oxygen.