Replaced by a nitrogen atom. Medical search. Frequent questions

These are azoles with an oxygen and a nitrogen separated by one carbon. (wikipedia.org)
Imidazole, an analog with the oxygen replaced by a nitrogen. (wikipedia.org)
Pyrrole, an analog without the oxygen atom. (wikipedia.org)
In the table below, pK a1 and pK a2 is given together with boiling and melting point, density and molecular weight, as well as number of carbon, hydrogen and oxygen atoms in each molecule. (engineeringtoolbox.com)
This requires mechanisms for nitrogen fixers to avoid oxygen in vivo . (bionity.com)
In this regards, Dr. Murai succeeded in synthesizing isologues, in which two oxygen atoms of carboxylates were replaced with a sulfur atom and a selenium atom, or two selenium atoms for the first time. (or.jp)
If you don't know what kind of pdb file you have, you can't tell if an atom named 'NO4'' is a nitrogen or an oxygen. (vanderbilt.edu)
The other edge is the carbon atoms the hydrogen is bonded to, which in the grip of oxygen become a climate-warming veil of carbon dioxide gas. (akbizmag.com)

This is replaced by a hydrogen atom where norepinephrine or Noradrenalin is concerned. (differencebetween.net)
In Noradrenalin, it is replaced by a hydrogen atom. (differencebetween.net)
The hexagon is formed by six carbon atoms, each of which has a hydrogen atom attached to it. (newworldencyclopedia.org)
[4] Its structure differs from that of epinephrine only in that epinephrine has a methyl group attached to its nitrogen, whereas the methyl group is replaced by a hydrogen atom in norepinephrine. (wikipedia.org)
In these organic derivatives, at least one hydrogen atom has been replaced with alkyl groups. (gehring-montgomery.com)

Thus, the six carbon atoms in the benzene molecule form a perfect hexagon. (newworldencyclopedia.org)
The only alteration in the LSD molecule which did not reduce psychotomimetic potency was substitution of an acetyl group on the indole nitrogen (ALD-52). (erowid.org)
The reduction process also breaks the bonds between chlorine and nitrogen atoms in the chloramine molecule (NH2Cl), freeing the chlorine atoms and replacing them with hydrogen (H) to create ammonia (NH3). (liveaquaria.com)
A molecule that swaps out carbon for a nitrogen atom, NH3 is mostly used as fertilizer-88 percent of worldwide consumption. (akbizmag.com)

Since this reaction does not occur very often, and in fact goes the other way more easily, with ammonia breaking down into nitrogen and hydrogen, without nitrogenase, there would be much less life than presently exists. (bionity.com)
Nitrogenase bonds each atom of nitrogen to three atoms of hydrogen to form ammonia or NH 3 , and then ammonia is bonded to glutamate and becomes glutamine . (bionity.com)
We address the low selectivity problem faced by the electrochemical nitrogen (N 2 ) reduction reaction (NRR) to ammonia (NH 3 ) by exploiting the Mars-van Krevelen (MvK) mechanism on two-dimensional (2D) Ti 2 N nitride MXene. (nature.com)
Japan's largest electric utility wants ammonia to replace coal in its power plants. (akbizmag.com)
Prior to 2013, South Korea did import ammonia from Alaska, made at the Kenai Nitrogen Facility in Nikiski. (akbizmag.com)
This distinction simply points to the number of hydrogen atoms have been replaced from the original ammonia. (gazpack.nl)

Values for the negative logarithm of the acid dissociation constant, pKa, of the conjugated acid of amines, diamines and cyclic organic nitrogen compounds, shown together with the molecular structure of the acids. (engineeringtoolbox.com)
When two different carbon nucleophiles were added to thioformamides, they were successively incorporated to the carbon atom of the C=S group along with the elimination of the sulfur atom to selectively give tertiary amines. (or.jp)
Due to a free electron pair of nitrogen, amines are alkaline. (gehring-montgomery.com)
When nitrous acid reacts with primary amines, nitrogen is produced. (gazpack.nl)

PYRIDINE, also called azabenzene and azine, is a heterocyclic aromatic tertiary amine characterized by a six-membered ring structure composed of five carbon atoms and a nitrogen which replace one carbon-hydrogen unit in the benzene ring (C 5 H 5 N). The simplest member of the pyridine family is pyridine itself. (chemicalland21.com)
It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. (chemenu.com)

Thus, there are not enough electrons to form double bonds on all the carbon atoms, but the "extra" electrons strengthen all of the bonds on the ring equally. (newworldencyclopedia.org)
Unsaturated hydrocarbons , which have one or more double or triple bonds between carbon atoms. (wikipedia.org)
To break a nitrogen atom away from another means breaking all three of these chemical bonds. (bionity.com)
Nitrogenase thus breaks the triple bond by getting electron donors for each of the three bonds, and then bonds the nitrogen to hydrogen atoms. (bionity.com)
Nitrogenase associates with a second protein, and each cycle transfers one electron from an electron donor which is enough to break one of the nitrogen chemical bonds. (bionity.com)
In combination of these results with molecular orbital calculations, the fundamental notion of the delocalization of electrons in the system with unsaturated bonds including selenium and tellurium atoms was provided. (or.jp)
A. Coordination compounds are those that contain complicated ions and have a core metal atom or ion that is linked by coordinate bonds to a number of ions or neutral molecules. (extramarks.com)

A major difference between adrenaline and Noradrenalin is that adrenaline or epinephrine contains a methyl group that is attached to the nitrogen. (differencebetween.net)
4. Adrenaline has a methyl group attached to the nitrogen. (differencebetween.net)
A HEPES that is ethanesulfonic acid in which one of the methyl hydrogens is replaced by a 4-(2-hydroxyethyl)piperazin-1-yl group. (hmdb.ca)
The methyl group is replace with an ethyl group, though both remain attach to the nitrogen atom. (darkchemsvendor.com)

In graphene, on the other hand, dopants are generally deposited on top of the carbon sheet rather than taking the place of some of the carbon atoms . (phys.org)
Materials such as gold, bismuth and nitrogen dioxide have been used to dope graphene with varying degrees of success. (phys.org)
According to an article in Scientific American , "Professor Menon and his team were able to discover half-light, half-matter particles in atomically thin semiconductors (thickness ~ a millionth of a single sheet of paper) consisting of a two-dimensional (2-D) layer of molybdenum and sulfur atoms arranged similar to graphene. (enterrasolutions.com)
The most well-known 2D-material is the single layer of carbon-atoms called graphene. (lu.se)

These are organic compounds containing a piperazine ring where the nitrogen ring atom carries an alkyl group. (hmdb.ca)
Reactions of secondary thioamides with BuLi generate carbanions adjacent to the nitrogen atom, and various electrophiles, including alkyl halides, carbonyl compounds, and oxiranes, were selectively incorporated into the carbanion centers. (or.jp)

All nitrogenases have an iron- and sulfur-containing cofactor that includes heterometal atom in the active site (e.g. (bionity.com)
Furthermore, in the case of thioformates, nucleophiles were introduced to the carbon and sulfur atoms of the C=S group to generate carbanions in the system. (or.jp)

Pyridine is a six-membered heterocyclic compound containing one nitrogen heteroatom. (chemenu.com)

One or more of the hydrogen atoms can be replaced with other atoms, for example chlorine or another halogen: this is called a substitution reaction. (wikipedia.org)

Nitrogenase ( EC 1.18.6.1) is the enzyme used by some organisms to fix atmospheric nitrogen gas (N 2 ). (bionity.com)
The HB process works by reacting atmospheric nitrogen (N 2 ) with hydrogen gas (H 2 ) at high temperatures and pressures (600 °C and 200 atm) to produce NH 3 3 . (nature.com)

A common solid-state quantum-sensor platform consists of microscopic artificial diamonds with defects within them, in which a carbon atom is replaced with a nitrogen atom and the adjacent carbon atom is missing. (ieee.org)
As many minerals are of biological origin, biologists may distinguish organic from inorganic compounds in a different way that does not hinge on the presence of a carbon atom. (wn.com)

See also boiling and melting point of different kinds of organic compounds , boiling and melting point of organic nitrogen compounds , pKa of phenols, alcohols and carboxylic acids and pKa of inorganic acids and bases , as well as acid and base pH indicators and Acid-base properties of aqueous solutions of salts with ions from both acids and bases . (engineeringtoolbox.com)

In most, this heterometal is molybdenum , though in some species it is replaced by vanadium or iron . (bionity.com)

This means that instead of being tied to one atom of carbon, each electron is shared by all six in the ring. (newworldencyclopedia.org)
Dinitrogen is relatively inert, this is because each atom of nitrogen has three open orbitals in its outer electron shell to bond with another atom, and that means that if two nitrogen atoms bond to each other, they do so in all three of these orbitals. (bionity.com)
This is because the resting state of MoFe protein does not bind nitrogen and also requires at least three electron transfers to perform catalysis. (bionity.com)
Researchers have enhanced the performance of perovskite solar cells by replacing the electron-transport layer with a thin layer of quantum dots. (materialstoday.com)
The underlying reason for these trends is electron configurations of atoms. (wikimili.com)
You should also consider the possibility that the crystallographers have mixed up the ND1 and CD2, and the NE2 and CE1 atoms (can only be decided from the H-bond pattern, not from the electron density). (lu.se)

He succeeded in synthesizing 5- N -arylaminothiazoles via the reaction of nitrogen-adjacent carbanions with thioformamides. (or.jp)
Once bound to DNA the second chloride ion is replaced by a guanine nitrogen atom from an adjacent DNA strand. (pvpharma.com)

Strengthening occurs by two mechanisms: (1) increasing dissolved nitrogen in the lattice and (2) formation of dispersed metal nitride phases. (cdc.gov)

This is usually considered to be because electrons are free to cycle around circular arrangements of atoms , which are alternately single- and double- bonded to one another. (newworldencyclopedia.org)
Nitrogen in the ring system has an equatorial lone pair of electrons, that does not participate in the aromatic pi-bond. (chemicalland21.com)
The periodic table exclusively lists electrically neutral atoms that have an equal number of positively charged protons and negatively charged electrons and puts isotopes at the same place. (wikimili.com)

Since further amendments are to be made, it of the protein content from the nitrogen content of should be recast in the interests of clarity. (who.int)
We mostly used molecular mechanics (MM) in order to model the protein-ligand interactions, which is more approximate than quantum-mechanical (QM) methods, but necessary to reduce the computational cost when doing calculations on protein-ligand systems, which often contain tens of thousand of atoms. (lu.se)

Since they are out of the plane of the atoms, these orbitals can interact with each other freely, and become delocalized. (newworldencyclopedia.org)

The exact mechanism of catalysis is unknown due to the difficulty in obtaining crystals of nitrogen bound to nitrogenase. (bionity.com)

For these very reasons, it is imperative to find a replacement, or complementary, process to the traditional HB process, and one such possibility comes in the form of the electrochemical nitrogen reduction reaction (NRR). (nature.com)

The structure of single walled armchair and zig-zag carbon nanotubes having 70 atoms and two carbons replaced by boron or nitrogen is obtained at minium energy using HF/6-31G* molecular orbital theory. (cuny.edu)
However, there are many other both single atom and compound varieties. (lu.se)

Derivatives in which this C=O group is replaced with a C=S group have been widely known for a long time. (or.jp)

Jesus' body, like ours, was made of atoms that were once between the stars. (sojo.net)
Currently, nitrogen alloying additions are made principally to fcc stainless steels. (cdc.gov)

In order for the electrochemical NRR technology to be economically viable, and perhaps, replace and/or complement the HB process, the process must exhibit a high selectivity, referred to as Faradaic efficiency (FE) toward NH 3 over other reactions, notably, the hydrogen evolution reaction (HER) 7 . (nature.com)

The tensile strength is approximately twice the tensile strength of similar steels without nitrogen. (cdc.gov)

The M stands for an early transition metal, the X is carbon or nitrogen, and the T is the surface termination, the kind of atoms sitting as the outermost layer of the sheet. (lu.se)

However, it has not been proven that exactly three cycles are sufficient to fix an atom of nitrogen. (bionity.com)
Perennial crops such as Kernza have also proven to be better at reducing nitrogen leaching and building up humus content. (lu.se)

In his incarnation, Jesus not only took up human form and human DNA but took up atoms that tied him to our planet, our sun, and the stars beyond. (sojo.net)
In austenitic fcc stainless steels, the concentration of nitrogen in solid solution increases linearly with pressure until it is sufficient to bring about a phase change or to cause a second phase to form. (cdc.gov)

Technology News 412 - high-pressure nitrogen alloying of steels. (cdc.gov)
Approach: Research by the U.S. Bureau of Mines indicates that steels melted and solidified under high nitrogen pressure acquire yield and tensile strengths that are up to four times the strengths of comparable stainless steel alloys without nitrogen. (cdc.gov)
They have achieved nitrogen concentrations as high as 1.0 wt% in these (stainless) steels. (cdc.gov)
The workability of the high-nitrogen Fe-Cr-Ni alloys was comparable to that of the same alloys without nitrogen. (cdc.gov)

The problem is that many 'pdb' files (created by Amber and other programs) don't follow this convention, and left justify the entire atom name in cols. (vanderbilt.edu)

Create an account below to get 6 C&EN articles per month, receive newsletters and more - all free. (acs.org)

Pure iron was melted under a nitrogen pressure of 50 MPa. (cdc.gov)

There was a lot of excitement after AF's release about replacing crystal structures with AF in docking in order to discover drugs more quickly and cheaply. (decodingbio.com)
The solubility of nitrogen in iron alloys depends on both the crystal structure and the alloy composition. (cdc.gov)

Isoxazole, an analog with the nitrogen atom in position 2. (wikipedia.org)
Inactivation was greatest in the case of BOL-148 and MBL-61 in which a bromine atom replaces hydrogen at position two of the indole ring. (erowid.org)

These nitrogen-vacancy (NV) centers may each be thought of as a " quantum bit " existing in a superposition of two energy levels, 0 and 1. (ieee.org)

When the flask is immersed in the Dry Ice bath the nitrogen stream is increased to counteract the diminution in pressure due to rapid cooling. (orgsyn.org)
Researchers at the Bureau recently melted steels in a hot isostatic-pressure furnace with nitrogen at pressures from 0.1 to 200 MPa. (cdc.gov)
2. Iron-chromium alloys were melted under a nitrogen pressure of 100 MPa. (cdc.gov)
4. Commercial austenitic stainless steels (Fe-18Cr-8Ni) that were melted under nitrogen pressure of 200 MPa also formed CrN. (cdc.gov)

During the diamond's formation, nitrogen impurities create a yellow hue ranging from light lemony to deep golden. (petragems.com)

3. Three series of alloys - iron-nickel (Fe-Ni), iron-chromium (Fe-Cr), and iron-chromium-nickel (Fe-Cr-Ni) - were melted under varying nitrogen pressures and for different times at temperature. (cdc.gov)
This release does not replace the previous NHANES III data releases series 11 Nos. (cdc.gov)

The water itself is, in turn, easily displaced by the basic nitrogen atoms on DNA, specifically on a guanine nucleobase. (pvpharma.com)

At the higher pressures, Bureau researchers observed the same trends noted by the European steelmakers: higher nitrogen concentrations and higher tensile strengths for both fcc and bcc iron alloys. (cdc.gov)

Nitrogen Alloying: Nitrogen alloying of a steel is generally done by introducing metal nitrides during melting of the steel. (cdc.gov)
European steelmakers currently have metal-processing systems that can melt and pour tons of steel under nitrogen pressures exceeding 4 megapascals (MPa) (40 atmospheres). (cdc.gov)

At 200 MPa, nitrogen concentrations exceeded 4 wt % in fcc iron alloys and 1.0 wt% in bcc iron alloys. (cdc.gov)

This thesis work aims to replace Ru polipyridyl complexes by Fe carbene complexes, that by clever ligand design have approached suitable photosensitiser properties. (lu.se)

Anatomy8

Organisms28

Diseases1

Chemicals and Drugs110

Analytical, Diagnostic and Therapeutic Techniques and Equipment30

Phenomena and Processes69

Disciplines and Occupations5

Technology, Industry, Agriculture11

Information Science5

Health Care14

Oxygen8

Hydrogen atom5

Molecule4

Ammonia6

Amines4

Benzene2

Bonds7

Methyl4

Graphene4

Alkyl2

Sulfur2

Pyridine1

Chlorine1

Atmospheric nitrogen2

Carbon atom2

Compounds1

Molybdenum1

Electron6

Adjacent2

Lattice1

Electrons3

Protein2

Orbitals1

Bound1

Reduction1

Single2

Derivatives1

Made2

Process1

Similar1

Transition metal1

Proven2

Form2

High4

AMBER1

Free1

Pure1

Crystal2

Position2

Energy1

Pressure4

Create1

Series2

Easily1

Trends1

Metal2

Iron1

Properties1