Sentences with phrase «oxygen atom in»

«As a result of screening about 200 compounds, we found that (3 - furyl) diphenylmethane (chem7), which is a triarylmethane that contains 2 phenyl groups and a furyl (a 5 - membered aromatic ring containing 4 carbons and an oxygen atom in the ring) group, had strong inhibitory activity on plant cell division,» says Ueda.

(The one oxygen atom in H2O weighs 16 amu.)

Researchers looked at the ratios of two forms of oxygen atoms in the minerals deposited in layers in two stalagmites that had formed in a cave in the Himalayan foothills about 200 kilometers north of New Delhi.

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.

The question then became: could this composite electrode efficiently spur the chemical reaction that rearranges hydrogen and oxygen atoms in water?

Most researchers believed that the light comes from oxygen atoms in the ionosphere.

The surprise to biochemists was that the enzyme, called FtmOx1, produces a highly reactive «helper» known as a free radical that assists in putting the oxygen atoms in the right place.

The green glow photographed by Kumar and Bondoux emanates from oxygen atoms in the atmosphere returning to their lowest - energy state after being excited by charged solar particles.

Free oxygen is not bound to another element, as are the oxygen atoms in other atmospheric gases like carbon dioxide and sulfur dioxide.

The link between energy and water is not always apparent, but the two are as intertwined as the hydrogen and oxygen atoms in a bottle of Evian.

Meanwhile, the team's computational collaborators in Catalonia provided a deeper understanding of the most stable arrangement of metal and oxygen atoms in the cluster.

Morihara believes that the aluminium ions bond to the silica, then grip the oxygen atoms in the alanines.

Oxygen atoms in the filaments absorb light from the quasar and slowly re-emit it over many thousands of years.

On the other hand, oxygen atoms in the dusty disk that would have been heated by stellar accretion within 5 AUs of the Sun could have quickly combined with primordial carbon grains.

Water molecules are shown as blue spheres, the four manganese atoms in purple, the calcium in green and the bridging oxygen atoms in red.

According to scientists, the quasar beam caused invisible filaments in deep space to glow through a process called «photoionization,» in which oxygen atoms in the filaments absorb light from the quasar and re-emit it over many thousands of years.

However, because there are a lot more oxygen atoms in an oxygen multimer than in a regular diatomic oxygen molecule, the ultraviolet light doesn't have to split the oxygen into individual atoms.

Not exact matches

If humans were not designed by a higher authority, how can each individual's DNA be uniquely different among the human species, especially different than the other animals; how can the life sustaining elements be constantly available and exist in exact formulations: O, H, C etc. water is always 2 atoms of Hydrogen and one atom of Oxygen; sugar, fats, grains, and any bio-chemical products can be broken down to their simplest forms of elements, but can be re-constructed with specific (not by chance) formula.

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

Clay minerals consist of crystals in which atoms of silicon, oxygen and a number of metals, such as aluminum, iron and various rarer and less frequent ones, are arranged in a three - dimensional lattice.

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?

Silicone chemistry is extremely complex; the polymer involved in the covering and the interior of the breast implant consists of a polymer of alternating silicon and oxygen atoms with methyl groups attached to the oxygen groups (methyl polydimethylsiloxane).19 The length of the polymer determines whether it is a solid, gel, or liquid.

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.

Krissansen - Totton explains in more detail: «Having methane and carbon dioxide together is unusual, because carbon dioxide is carbon's most oxidized state, and methane (composed of a carbon atom linked to four hydrogen atoms rather than any oxygen at all) is its least,» he says.

A good example of this is the uranyl, -LCB- UO2 -RCB- 2 + ion which is widely prevalent in the environment naturally and also nuclear waste where the two oxygen atoms reside opposite each other and are bonded very strongly to the uranium.

The hydrogen - bearing material is volatile (easily vaporized), and may be in the form of water molecules (two hydrogen atoms bound to an oxygen atom) or hydroxyl molecules (an oxygen bound to a hydrogen) that are loosely bound to the lunar surface.

Now, new observations of a particular wavelength of infrared light from that galaxy betrays the presence of oxygen atoms that have two electrons missing (in the smaller region depicted in green), researchers report online today in Science.

And even though an estimated 4 trillion trillion trillion atoms of oxygen have become embedded in the lunar soil in the last 2.4 billion years or so, that won't make settling the moon any easier.

Spinels consist of densely packed, highly symmetrical planes of oxygen atoms (somewhat like a densely packed box of marbles) where different metallic elements are lodged in the spaces between them.

Unlike water or regular ice, in superionic ice the water molecules dissociate into charged atoms called ions, with the oxygen ions locked in a solid lattice, while the hydrogen ions move like the molecules in a liquid.

Alternatively, the water at Cabeus may have been created when hydrogen atoms carried by the solar wind slammed into oxygen - rich materials in the lunar surface.

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

(The unusual form of hydrogen let scientists correct results for oxygen atoms lost in H2O, for instance when the bear urinated.)

These oxygens have a partial negative charge (as in the molecule of water) and the oxygen atom attracts the electrons of the bonds more effectively.

Biomass is rich in organic molecules — long chains of carbon atoms attached to oxygen.

In the other mechanism posited, one hydrogen atom associates with an oxygen atom to make OH and the other hydrogen atom associates with a cerium atom to make cerium hydride (CeH).

Oxygen atoms are represented in gray and carbon isotopes are in orange.

During use, lithium ions stored in the graphite flow to the lithium - based electrode, where they form chemical bonds with oxygen atoms, a reaction that generates an electric current.

Using a molecular dynamics code called NAMD, the team ran simulations of the wild lignin and the genetically modified lignin in a water cube, modeling the presence of the aldehydes by altering the partial charges of the oxygen and hydrogen atoms on the modified lignin's allylic site.

The highly reactive radical, Cl •, then abstracts a hydrogen atom of CH4 to give methyl radicals, CH3 •, which in turn react with oxygen to produce valuable methanol and formic acid.

Combustion causes almost every atom of carbon in the fuel to combine with two atoms of oxygen, producing carbon dioxide.

This material, in which carbon substitutes for some of the lattice oxygen atoms, absorbs light at wavelengths below 535 nanometers and has a lower band - gap energy than rutile (2.32 versus 3.00 electron volts).

As the 2 - to -5-inch-long bivalves grew, their shells incorporated atoms of the elements oxygen and carbon of slightly different masses, or isotopes, in ratios that reveal the temperature of the surrounding seawater.

Atoms of most elements, such as hydrogen, oxygen and carbon, form tight chemical bonds by sharing electrons with their neighbours in order to give each atom a stable configuration of electrons.

I knew that heme, the oxygen - carrying molecule in hemoglobin, contained an iron atom within a porphyrin ring (for more information on porphyrin chemistry see this site at Washburn University), but Dr. Datta - Gupta and his laboratory technician attempted to chemically add different metals such as copper, magnesium, or manganese to porphyrins using column chromatography.

«They behave much like enzymes do in living organisms, breaking down the bonds between carbon and oxygen atoms.

Here, passivation means that the oxygen atom reduces undesired interaction between the atoms of the tip and the atoms in the molecules under investigation.

«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.

POMs are molecular transition metal - oxygen clusters in which the metal atoms are bridged by oxygen atoms to form a three - dimensional network.

When paint is first spread on with a brush, the carbon atoms jump into action by bonding with oxygen in the atmosphere.