Sentences with phrase «oxygen atoms on»

The iodine's cationic behavior strongly attracts the negative oxygen atoms on three nearby water molecules.

In the most common motif, created about 57 % of the time, hydroxide's oxygen atoms bonded with the hydrogen atoms on 4 water molecules while the hydroxide's hydrogen bonded to the oxygen atom on another water molecule.

Not exact matches

Within these clouds, on the surfaces of tiny dust grains, hydrogen atoms link with oxygen to form water.

The mechanism of the subsequently applied relatively new cooling technique relies on the fact that these molecules exhibit a permanent electric dipole moment (i.e. the negative charge is shifted towards the oxygen atom).

The first mechanism suggests hydrogen (H) atoms each associate with only oxygen (O) atoms to produce only OH species on the surface.

Depending on the concentration of oxygen atoms, the chain - like slabs were two, three, or four layers thick, sometimes varying within the same material.

This frees up oxygen atoms, which join up to form ozone molecules on the cooler night side (Icarus, DOI: 10.1016 / j.icarus.2011.08.010).

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 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.

Of the two types of atom, oxygen has more pull on the electrons that they share to form the bonds between them, so the oxygen becomes slightly negatively charged and the hydrogens slightly positive.

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.

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

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

«On the surface of nickelate, you have one nickel atom at the center of a square of four oxygen atoms,» Cooper said.

«Because of this new structure they're taking on, they're naturally shortening the distances between platinum atoms, which makes the platinum more active for the oxygen reduction reaction,» says Luke Roling, a graduate student in Mavrikakis» lab.

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.

«What people thought was happening is after the hydrogen atoms broke apart and they're adsorbed onto the palladium surface, that they just reacted with the oxygen on the surface.

After breaking away from the molecule in the strong laser field, the electron returned and was scattered on a molecular ion, which resulted in the molecule dissociation into a positive nitrogen ion and an oxygen atom.

«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.

His team put radio collars on the animals, injected them with water with heavy hydrogen and oxygen atoms so these elements could be traced, recorded the animals» behaviors, and collected their feces to check for how fast those atoms were used, an indicator of metabolic rate.

Our catalyst improves this process by passing through a chemical intermediate — called an eta -3-ozone intermediate — in which the two oxygen atoms from molecular oxygen can be easily separated from each other and passed on to two different molecules of substrate.

Scientists suspect water on the surface of Mars evaporates, rises into the upper atmosphere, breaks into hydrogen and oxygen atoms, and is then swept into outer space by the solar wind.

Charged lithium atoms react with the oxygen from air flowing through the apparatus, forming lithium peroxide, and deposit on the structure.

After testing many alternatives, the chemists found an organic molecule that clamps down — like Pac - Man — on one of uranium dioxide's oxygen atoms.

This weakens uranium's grip on the other oxygen, the researchers report tomorrow in Nature, allowing it to react with one of the new molecule's silicon atoms.

The researchers discovered that the unique manner in which the platinum and nickel atoms arrange themselves on the surfaces of these particles serves to optimally accelerate the chemical reaction between hydrogen and oxygen to form water.

The carbonates vary subtly depending on the sources of their carbon and oxygen atoms.

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.

While iodate is huge and surrounded by negative oxygen atoms, its central iodine atom takes on a positive character, or becomes a cation.

Nitrogen, in the form of nitric oxide (one nitrogen atom and one oxygen atom), has been detected for the first time on the surface of Mars by a team of researchers using the Sample Analysis at Mars (SAM) instrument suite aboard NASA's Curiosity rover, adding to the growing speculation that life could have once flourished on ancient Mars.

A molecule containing three oxygen atoms, computer models suggest that ozone on Venus is formed when sunlight breaks up carbon dioxide molecules and releases oxygen atoms, which are swept around to the planet's nightside by winds where they can then combine to form unstable, three - atom ozone molecules, as well as much more stable, two - atom molecules essential for animals.

The method is based on low - temperature atomic force microscopy (AFM) and uses a copper - based probe tip, which is terminated by a single oxygen atom.

The presence of ozone helps to explain the detection of hydroxyl (an unstable molecule of oxygen with a single atom of hydrogen) high in planet's atmosphere in 2008 (ESA news releases on ozone, sulfur dioxide, and hydroxyl; Lisa Grossman, New Scientist, October 6, 2011; and Montmessin et al, 2011).

While elements like oxygen, silicon, magnesium, and iron are much heavier atoms than hydrogen or helium, they are just not abundant enough to make a significant contribution on their own.

Dr. Scott Chambers is a Laboratory Fellow and leads a research team focused on the properties of «designer» oxides — materials which combine different metal atoms with oxygen atoms into solid materials.

VHL binds to amino acids on HIF that have oxygen atoms attached to them.

X-ray technique coupled with theory reveal how oxygen atoms near the surface of Cu had a dramatic effect on the reaction than earlier theories could account for.

Ozone, on the other hand, is a form of oxygen that is composed of three oxygen atoms.

«The net effect of this is that, although the total electronic charge on the molecule balances the total nuclear charge, each oxygen atom carries a small net negative charge, and a balancing positive charge is associated with the carbon atom.

But many molecules have more than two atoms — carbon dioxide, for instance, is triatomic, consisting of a carbon molecule linked to two oxygen molecules — one on each arm, as it were.

Ozone is a molecule made up of three oxygen atoms, and the ozone layer, which stretches from heights of 12 to 19 miles (20 to 30 kilometers) above the Earth's surface, protects life on Earth by shielding it from ultraviolet (UV) radiation.

While they show that there is indeed an influence on a molecule's radiative efficiency with respect to whether a CF3 group is bonded to the ether oxygen atom or whether it is more removed from the ether oxygen, for example, their study misses the underlying fundamental molecular properties responsible for radiative efficiency.