Sentences with phrase «heavy atoms»

She had used the presence or substitution of heavy atoms to help define earlier structures, and she realized cobalt could play a similar role.

But the researchers were unable to incorporate heavy atoms in these crystals.

These stars are relatively more metals rich than outer - halo stars, with around three times more heavy atoms such as iron and calcium.

Stars are factories that convert lightweight elements into heavier atoms.

One or more heavy atoms are introduced into specific sites in the crystal without disturbing its perfect repeating pattern.

Those stars were the ones that formed the first heavy atoms that ultimately allowed us to be here.

Hundreds of reactors around the world are splitting heavy atoms in the process called fission — providing about 13.5 per cent of the world's electrical energy

The interstellar medium is mostly hydrogen and helium, peppered with heavier atoms, a few molecules, and some dust — pretty benign stuff, on the whole.

When heavy atoms fission and release energy, the two smaller atoms remaining (called fission products) are often left with some extra energy to give off.

The fiery engine inside those stars, as well as the violent explosion of the very massive ones that died, fused atoms together to create heavier atoms.

A three - dimensional x-ray diffraction study of aspartate transcarbamylase to 5.5 - angstrom resolution, with the aid of four isomorphous heavy atom derivatives, indicates the presence of a central aqueous cavity approximating an oblate spheroid about 25 by 50 by 50 angstroms in dimension, within a molecule about 90 by 110 by 110 angstroms in largest dimensions.

When they infused the patients with a glucose tagged with stable heavy atoms immediately prior to surgical removal of tumor tissue, they found that PC was selectively activated — in other words, PC expression may play an important role in the development of lung cancer.

Binns discards them and focuses instead on rare but much more communicative heavy atoms, ranging in mass from zinc to molybdenum — the «trans - iron» elements that make up the TI in TIGER — which are produced in the nuclear furnaces of extremely massive stars.

Hunting for the universe's heaviest atoms just got a little easier, thanks to a new technique that directly measures the mass of elements heavier than uranium.

Nuclear fusion offers the potential for producing practically limitless energy by smashing heavy atoms of hydrogen into helium inside a burning 100 - million - kelvin plasma and capturing the energy released by the reaction — but scientific and engineering challenges remain.

The calcium in your bones, like every other heavy atom in your body, was forged in the fiery furnace of enormous stars, 10, 100, even 1000 times the mass of the sun.

But when Santoro grew these same bacteria in her lab, they produced nitrous oxide with too few heavy atoms.

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.

Another isotope is carbon - 13, a slightly heavier atom with six protons and seven neutrons, which accounts for the other 1 percent.

The nuclear power plants in use around the world today use fission, or the splitting of heavy atoms such as uranium, to release energy for electricity.

Their method, like that of existing reactors, is based on fission, or splitting heavy atoms, then using the resulting heat to spin turbines and make electricity.

It does this by slamming the nuclei of heavy atoms such as gold into one another at nearly the speed of light.

The shrinking process super heats the star to around 100 million degrees, which in turn causes it to fuse helium reserves into heavier atoms such as oxygen.

The strategy involves using an X-ray wavelength that just excites a single heavy atom — in Bijvoet's case, rubidium — to extract phase information.

Fusion power is a much safer alternative than nuclear power, which is based on the splitting (fission) of heavy atoms.

Particle physics gives us clues to what Dark Matter might be, and the standard view is that Dark Matter particles have a very large mass for fundamental particles, comparable to that of heavy atoms.

(A heavy atom moves more slowly than a light one, as does one with a small charge, which receives a smaller kick from the electric pulse.)

They comprise a mélange of lighter elements created when the heavy atoms split.

Cosmic rays zooming through space sometimes crash into heavier atoms, knocking off protons and neutrons and creating elements such as beryllium and lithium.

By fusing together the nuclei of two light atoms, or by splitting a heavy atom in a process called fission, we can release some of this binding energy.

The idea is that WIMPs shooting through the heavy atoms will eventually knock around nuclei, exciting the atom and giving off light energy that can be absorbed by phototubes flanking the tank as well as electronic activity that can be detected by detector wires in the liquid.

During its 55 - day flight, Super-TIGER collected just a few thousand of the heavy atoms that Binns seeks, with the help Super-TIGER's collaborators at the Goddard Space Flight Center, Caltech, the Jet Propulsion Laboratory, and the University of Minnesota.

The same coexistence can't be realized with silicon as a semiconductor: «You need the heavy atoms in SrTiO3 for the spin orbit coupling at the interface that is responsible for the large TAMR effect at room temperature.»

Because the nucleus of these heavy atoms is highly charged, the electrons start to move at significant fractions of the speed of light.

Diffused into the tenuous lunar atmosphere or liberated by the occasional impact, heavy atoms such as silver could bounce around the moon until they reached a cold trap.

The heavier the atom is, the higher the frequency of that flapping, which is known as the Compton frequency.

But in practice, it will likely be difficult to do with the heaviest atoms because they are so hard to synthesise in the first place.

If it all sounds too radical, that may be a good thing: most direct detection experiments, which wait for an ordinary WIMP to collide with the nucleus of a heavy atom like germanium or xenon, have seen nothing (see «Going underground in search of dark matter strikes «-RRB-, for example.

But while AMS looks for positrons given off when WIMPs collide, the hope down here is that a WIMP will knock into a heavy atom in supercooled crystals, making the atom's nucleus recoil and sending out a signal.

«The number of formed superheavy nuclei increases when a target made of heavy atoms (e.g., Pb) is used.

While the conventional nuclear reactor breaks a heavy atom like plutonium to gather the binding energy, the fusion reactor will fuse two light elements like say hydrogen into helium to harness the energy.

Students cross off symbols that correspond to statements like «the noble gas with the heaviest atoms.»

Since carbon has heavier atom than the hydrogen atom (about 12 times heavier) the bulk of the gasoline mass is carbon.