Sentences with phrase «arrangements of atoms»

Dresselhaus receives the prize for her research into uniform oscillations of elastic arrangements of atoms or molecules called phonons, phonon - electron interactions and heat conductivity in nanostructures.

The process of finding novel arrangements of atoms with interesting and useful properties does not appear to be slowing.

The material is an amorphous steel alloy, a promising subclass of steel alloys made of arrangements of atoms that deviate from steel's classical crystal - like structure, where iron atoms occupy specific locations.

1 It's all about the rhythm: Crystals are repeating, three - dimensional arrangements of atoms, ions, or molecules.

Johnson and his team have developed ways to fast - freeze the chemical process so that transient structures can be isolated, revealing the contorted arrangements of atoms during a reaction.

«Imagine the complexity of all the enormous number of possible arrangements of atoms in DNA or any other biologically active molecule.

Drugs are chemical compounds with differing arrangements of atoms.

The method reveals the atomic structure of materials because different arrangements of atoms cause electrons to interact in different ways.

Their observations make it possible, for the first time, to infer the macroscopic properties of materials based on their structural arrangements of atoms, which will guide how scientists and engineers build aircraft components, for example.

is the birthday of Vladimir Prelog, a pioneer in stereochemistry, the field that studies how the chemical properties of molecules are affected by the three - dimensional arrangements of their atoms.

In a stacking fault, a stack of periodic arrangements of atoms in crystals gets added or missing.

Two solids made of the same elements but with different geometric arrangements of the atoms, or crystal phases, can produce materials with different properties.

Synthesizing desogestrel is no simple task, as the small steroid is crammed with stereocenters — carbons bonded to four different groups, one of the most difficult arrangements of atoms to manipulate.

For example, in the atomic theory the essential particulars are the structures and arrangements of atoms.

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.

The arrangement of atoms in an alloy changes the chemical properties of its constituent metals and makes it potentially useful to catalyse reactions.

Eventually scientists and engineers came to understand why: the most commonly used moly sulfide materials had an unsuitable arrangement of atoms at their surface.

Herzon and his colleagues discovered they could prepare an isomer of pleuromutilin — a compound that has the same connectivity, but with a different arrangement of atoms — and rearrange it in the final steps of the synthesis to pleuromutilin.

The product's chirality just depends on the arrangement of these atoms, so if you begin with a pure enantiomer, you retain that purity.

Stereoisomers are substances which have the same chemical composition, yet differ in the spatial arrangement of their atoms.

But in rare cases molecules with an even number of electrons can behave like radicals, because the arrangement of their atoms prevents all the electrons from finding partners with which to pair up.

Starting in 1946, Shull worked out how to deduce the arrangement of atoms in the material from these patterns.

The highly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet - like arrangement of its atoms.

Traditionally, Fischer and other chemists conduct detailed analyses to determine the products of a chemical reaction, and even then, the actual three - dimensional arrangement of atoms in these products can be ambiguous.

They have all of the same atoms, but the spatial arrangement of the atoms changes the three - dimensional structure.

Amorphous Lacking a regular internal arrangement of atoms.

By heating the crystal and changing the arrangement of its atoms, they could control the amount of light scattering within the laser and hence the color of emitted light.

In the high school unit, Roseman noted, similar atomic and molecular models are also used but in conjunction with bar graphs and energy transfer diagrams to help students understand that the energy changes they observe during chemical reactions are associated with changes in the arrangement of atoms.

The specimen is a quasicrystal, a type of material that shatters the rules of crystallography by having an ordered — yet never - repeating — arrangement of atoms.

The group continued to stretch and squeeze the ion crystal to manipulate the arrangement of atoms, and discovered that if the atom spacing is mismatched from that of the optical lattice, friction between the two surfaces vanishes.

A nearly random arrangement of atoms gives glasses distinctive mechanical and magnetic properties.

Phase change materials that change their optical properties depending on the arrangement of the atoms allow for the storage of several bits in a single cell.

This is due to so - called phase change materials, novel materials that change their optical properties depending on the arrangement of the atoms: Within shortest periods of time, they can change between crystalline (regular) and amorphous (irregular) states.

Tanner decoded the diffraction patterns from his crystals to understand the precise arrangement of the atoms in the protein and created a 3 - D «map» of the PutA enzyme.

Indeed, the random arrangement of the atoms in a disordered medium such as glass is not observable with visible light: the glass looks completely homogeneous, even under the best optical microscope.

The STO is shown as blue pyramids, which represent the arrangement of its atoms.

They found that the particles were covered with ridges made from a more open, yet symmetrical, arrangement of atoms.

Understanding how these complex molecules do their job depends on knowing the spatial arrangement of atoms and how their structure changes as they interact with light.

They are currently examining different ligated clusters to understand how the spatial arrangement of the atoms in the ligands alters the abundance of clusters formed in solution and their stability in the gas phase.

These methods make assumptions about the arrangement of atoms, which isn't a good fit for nanoparticles because no two are alike.

At the molecular level, solid, hexatic, and liquid systems are defined by the arrangement of their atoms.

By taking multiple images of the iron - platinum nanoparticle with an advanced electron microscope at Lawrence Berkeley National Laboratory and using powerful reconstruction algorithms developed at UCLA, the researchers determined the precise three - dimensional arrangement of atoms in the nanoparticle.

So we can not only show the arrangement of atoms, but also the handedness of molecules, in which pharmaceutical companies are interested.»

The 3 - D reconstruction reveals the arrangement of atoms in unprecedented detail, enabling the scientists to measure chemical order and disorder in individual grains, which sheds light on the material's properties at the single - atom level.

In 1951 J. M. Bijvoet, A. F. Peerdeman, and A. J. van Bommel showed, using x-ray crystallography, that the absolute arrangement of atoms in space for sodium rubidium tartarate could be determined.

Ultimately, the particles are brought together by forces between them that are caused by the arrangement of atoms on or near the particle surfaces.

These reactions are influenced by the arrangement of atoms at the interface — where minerals and water touch.

Just a perfect arrangement of atoms trying to gravitate towards another.

Not exact matches

Graphene is a sheet of carbon atoms in a hexagonal tiling arrangement.

The whole experimental arrangement, while necessary to obtain knowledge about atom A, is quite independent of the essence of the atom in itself.