Sentences with phrase «molecules absorb light»

Infrared spectroscopy provides details by exploiting how molecules absorb light in the infrared region.

As starlight passes through a planet's atmosphere, atoms and molecules absorb light at certain wavelengths, blocking it from the telescope's view.

Many molecules absorb light of this spectral region in a very characteristic way — they can be considered to have an «optical fingerprint.»

These molecules absorb the light that is missed by the polymer and transfer the «harvested» energy to the film, enhancing its luminescent emission.

Not exact matches

Producing methamphetamine gives off toxic fumes, and Bridger's laser technology, which is still in development, detects these gases by measuring the amount of light absorbed by the gas molecules.

One type, known as plastic, organic or polymer photovoltaic solar cells, uses conductive organic polymers or organic molecules to absorb light, transfer the charge and produce electricity.

Golden Rice is a strain that is genetically modified by molecular techniques (and therefore labeled a genetically modified organism or GMO) to produce β - carotene, a precursor of vitamin A. Vitamin A is an essential component of the light - absorbing molecule rhodopsin in the eye.

The laser generates a specific wavelength of light that is absorbed in a stoichiometric fashion by glucose molecules — the more glucose molecules; the more photons are absorbed.

These molecules initially comprise just a small fraction of the gas, but they can absorb heat from the surrounding gas and get rid of it by emitting light, thereby cooling the cloud enough for stars to form.

Molecules in a planet's atmosphere can absorb passing starlight, imprinting barcode - like signatures on the light that astronomers can then detect.

Scientists, in collaboration with ICI Australia, experimented with hundreds of versions of the MAA molecule, knocking off water - soluble groups and adding others to enhance the ruggedness of the light - absorbing part of the molecule.

For starters, the bandage's not - so - secret key ingredient is phosphors — molecules that absorb light and then emit it via a process known as phosphorescence.

In bird eyes, suitable radicals are believed to be generated within cryptochrome, a light - absorbing protein that produces an as - yet - unidentified signaling molecule in a quantity determined by the field direction, resulting in an avian magnetic compass.

The fiber tracts light up in a violent red as soon as they absorb the doxorubicin molecules.

At this high pressure, nitrogen lost all signs of being a molecule — infrared light that normally is absorbed by nitrogen - nitrogen bonds passed right through the sample, they report in the 7 August Physical Review Letters.

The team used calculations based on quantum mechanical equations to predict the chances of a CO2 molecule absorbing different colours of light, which have defined energies.

But if those aromatic hydrocarbons were treated with an acid to create aniline or another amine, after some additional steps the newly synthesized molecules very efficiently absorbed light particles from specific wavelengths in the visible spectrum.

They analyzed the samples for colored dissolved organic matter, which contains light - absorbing molecules from the breakdown of plant polymers such as lignin.

When the quantum dots absorb ambient light, they transfer some of that energy to nearby dye particles, causing the crystal violet to release a kind of high - energy oxygen molecule that kills microbes.

During a transit, some starlight passes through the planet's atmosphere, and molecules in the atmosphere absorb specific frequencies of that light.

High - resolution x-rays of the antibodies showed that this theory made sense: The antibodies include sites that can bind oxygen molecules, others that can hold water molecules, and an amino acid where UV light can be absorbed.

When a molecule absorbs a photon — the fundamental particle of light — electrons in the molecular system are promoted from a low - energy (ground) state to a higher - energy (excited) state.

To get a different view, astronomer Giovanna Tinetti and her colleagues at the European Space Agency and University College London focused instead on the light grazing the atmosphere of HD 189733 b. Tinetti had predicted that water would absorb more light at the longer wavelength of 5.8 microns (thousandths of a millimeter) than at 3.6 microns, in contrast with other molecules such as methane and ammonia.

The light harvesting antenna molecules, called N - alkyl -2-aminoterephthalates, can be designed to absorb specific colors of light when incorporated in the MOF.

And to know what to look for — water molecules absorb and emit different wavelengths of light when they're superhot and furiously jiggling — Bernath heated a tube of water in his lab to 2800 degrees.

The wavelengths of the absorbed light reveal how the target molecule's chemical bonds vibrate, which in turn tells about the types and positions of atoms in the molecule, the kinds and strength of bonds among atoms and the symmetry of the molecule, Milo says.

This chiral light is absorbed differently by molecules of opposite handedness.

He recently has focused on a specific skin - barrier protein called filaggrin, which is broken down into a molecule called urocanic acid — the most potent absorber of UVB light in the skin, according to Elias.

Some observations of how cosmic molecules emit and absorb light at ultraviolet wavelengths have hinted that the fine structure constant, responsible for the strength of electromagnetism, is not the same throughout the universe.

It turns out that many molecules found in foods absorb ultraviolet or visible light and subsequently emit light as fluorescence.

In the «first stage» light is absorbed and used to produce energy molecules, with oxygen as a byproduct.

When this many - color light is sent through a chemical specimen, some colors are absorbed by the specimen's molecules.

The first stage absorbs light in the form of photons and uses it to produce energy storage molecules, which are then used to power the second stage, which fixes carbon from the air into carbon - based sugars, such as sucrose and starch.

UV astronomy must be conducted in an airless environment — in Earth orbit, say, or on the moon — because water molecules in Earth's atmosphere absorb UV light.

This atmospheric layer includes molecules that absorb ultraviolet and visible light, acting as a kind of «sunscreen» for the planet it surrounds.

When light hits a painting, some photons are absorbed by pigment molecules, which split apart.

As this light passes through the exoplanet's atmosphere, some of it is absorbed by atmospheric molecules.

Like all other molecules, carbon dioxide molecules absorb only certain colors of light, producing a unique pattern of dark features in the spectrum.

By absorbing a photon of light, photosensitive molecules can reposition chemical bonds and thus create a «kink» in the polymer chain.

That light is absorbed by the chlorine - based molecules, which then excite nearby oxygen molecules, creating a highly reactive form of oxygen, known as singlet oxygen, that rips apart nearby biomolecules and kills the tumor cell.

They picked a color of laser light that ensured the energy absorbed by the molecules would not set them spinning.

Cyanobacteria absorb light energy from the sun and use it to convert carbon dioxide into food and other molecules, while also giving off oxygen.

The light - absorbing molecules break off from the chains when exposed to ultraviolet light at 350 nanometers wavelength, triggering degradation of the plastics.

The researchers heated a solution of molecules derived from fructose — the basic building blocks for their plastics — and molecules that can absorb light to make long chains that form the plastics, which appeared as pale brown solids.

But biochemist Wen - Hong Li of the University of Texas Southwestern Medical Center in Dallas cautions that it remains to be seen whether NDBF will absorb light as efficiently when it locks up molecules other than calcium.

«When an exoplanet passes in front of its star, light can be absorbed at some wavelengths by molecules in the atmosphere, which we can analyze by looking at how light passes through the planet's atmosphere,» said Benjamin Charnay, a postdoctoral researcher in the University of Washington Department of Astronomy.

To do this, as they describe in Applied Physics Letters, from AIP Publishing, the team developed an approach to nondestructively identify and quantify the concentration of light - absorbing molecules known as chromophores in ancient paper, the culprit behind the «yellowing» of the cellulose within ancient documents and works of art.

The chemical bonds in each molecule absorb infrared light of a characteristic wavelength.

He identified the excited electron states in 15 chromophores, or light - absorbing structures, and provided theoretical chemistry insights on the mechanisms by which these molecules take in the light.

«You wind up with particles that have defect sites, slightly different shapes and crystal structures that make them absorb light and molecules on their surfaces a little differently.»