Sentences with phrase «chemical bonds formed»

In the above examples, the prenucleation cluster formation is a polymerization - like event, because the chemical bonds formed are mostly covalent (silica) to partly ionic (transition metals).

Molecular movies reveal how chemical bonds form and break; ultrafast snapshots capture electric charges as they rapidly rearrange in materials and change their properties; and sharp 3 - D images of disease - related proteins provide atomic - level details that could hold the key for discovering potential cures.

A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O).

Not exact matches

One is a lithium - sulphur battery that stores and releases energy by forming and breaking chemical bonds, instead of slotting ions into structural gaps.

The arrangement of chemical bonds in different materials can make it hard to put them together to form a clean interface, like the green and red blocks in the figure.

In samples of fine - grained deposits and drilled mudstone, the Mars rover Curiosity discovered «fixed» nitrogen — a chemical form in which the ultrastrong bond in nitrogen gas, or N2, has broken.

It also has a similar structure to some other organic weak bases that have been used to catalyze the type of chemical reaction needed to form these gels — the formation of ester bonds to create a polyester.

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.

Chemical bonds hold each atom at precise distances from its neighbours, forming a recurring -LSB-...]

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.

But the nature of these dimers has been hotly debated because it was not known whether the two beta - amyloid molecules that form the dimer were linked by a chemical bond or not.

The chemical feature that enables this suppression is a bond between two oxygen atoms — an unstable peroxide bridge that releases a tiny barrage in the form of free radicals (unpaired electrons) that can fracture parasite proteins the way an F5 twister tears apart barns.

There are still many problems in synthesis and preparation of materials and we need to understand the processes that create them, how exactly molecules react, how the chemical bonds break and form.

For the acid dyes to color the eggshell (or silk fibers in the tie), they must undergo a chemical reaction that forms a chemical bond between the dye and the eggshell proteins (or silk fibers in the tie).

It forms strong chemical bonds with many other elements, and as a result, it tends to remain locked away in oxides that are forever entombed in the bowels of the planet — in the form of rocks.

In the case of chemical compounds, Miao explained, helium doesn't form any kind of chemical bond with its neighboring atoms.

Also, about half the cyanide groups along the rods reacted with neighbouring cyanides to form chemical bonds, preserving the shape of parallel ranks of molecules and stabilising the polymer.

«That electron sharing is responsible for the chemical bond which binds the protons together to form the molecule,» he said.

Chemical biologists led by Dana - Farber's Nathanael Gray, PhD, designed and custom - made a compound called THZ1 that forms a particularly strong bond with CDK7, rendering the protein essentially nonfunctional.

The chemical bonds between carbon and nitrogen which link together amino acids to form proteins pose a classic chicken - and - egg dilemma for biologists studying the origin of life.

The method is also highly enantio - and regioselective, meaning that researchers could control the precise geometry and position at which the new chemical bond is formed between the two coupling partners, attractive features that have not been offered by previous methods.

«While atoms form molecules based on the nature of their chemical bonds, there has been no easy way to impose such a specific spatial binding scheme on nanoparticles.

The researchers can now observe in high detail how electrons move within a molecule or how chemical bonds are formed.

To fulfil their function as biocatalysts, enzymes require chemical energy, which is typically supplied in form of sugar or other high - energy bonds.

In reactive landing techniques, the ionized molecules hit the surface with more force than soft landing and react with the surface forming chemical bonds.

One chemical forms two colors of crystals, sheds insight on agostic bonds important in industrial catalysis

The samples ranged from a simple alcohol to a complex plant hormone, and the new method, dubbed «CAL» for covalent alignment (the molecules form a type of chemical bond known as a covalent bond in the MOFs), enables researchers to determine the complete structure of a molecule from a single MOF crystal that contains the sample molecules in its pores.

While chemists have studied these bonds in chemicals in liquid form, no one had crystallized one chemical with multiple forms of its agostic bonds.

«With HiRES, the time resolution will be about 100 femtoseconds, or the time it takes for chemical bonds to form and break.

Using a form of atomic force microscopy, scientists can differentiate the chemical bonds in a single molecule of nanographene.

As a result of the quantum mechanical forces, the individual atoms of the wire form new chemical bonds with the atom at the tip of the STM probe.

«This allows for some deep insight into the nature of chemical bonding — and as Goethe wrote, ultimately what holds the world and its compounds together in its inmost form.»

But atoms that typically form only two chemical bonds, such as oxygen, don't often make long, polymer - like chains.

At least for young girls, talking on the phone with their mothers reduces a key stress hormone and also releases oxytocin, a feel - good brain chemical that is believed to play a key role in forming bonds, the study found.

Each amino acid has two chemical groups, an amino group and a carboxyl group, which can form chemical bonds with other amino acids.

When a mother during pregnancy inhales PAH, the pollutants can be transferred through the placenta to bind to the DNA of the fetus, forming «adducts,» or pieces of DNA bonded to chemical mutagens, in blood and other tissues, according to the investigators.

But the bond is weak causing carbonic acid to convert back and forth with its CO2 form so rapidly, most researchers treat these two forms as the same chemical species.

But unless we use that energy to form chemical bonds it all gets released back into the environment as waste heat.