Sentences with phrase «of electron capture»

From Wikipedia: «After the development of his electron capture detector, in the late 1960s, Lovelock was the first to detect the widespread presence of CFCs in the atmosphere.»

Lovelock was also one of the first people to discover a link between CFCs and the depletion in the ozone layer through the invention of the electron capture detector, a device that detects atoms and molecules in gas.

Lovelock's invention of the electron capture detector in 1957 first enabled scientists to measure CFCs (chlorofluorocarbons) and other pollutants in the atmosphere, leading, in many ways, to the birth of the modern environmental movement.

His invention of an electron capture device that was able to detect tiny amounts of chemicals enabled other scientists both to understand the dangers of DDT to the egshells of birds and to figure out the ways in which chlorofluorocarbons were eroding the ozone layer.

This decay mainly occurs due to positron emission; however, around — % of the time, it is a result of electron capture.

Not exact matches

In my view this arises from the striving of partly completed atoms and molecules to complete their forms by capturing electrons.

I think the capture of molecules from solution by a growing crystal is rather like this and so is the capture of an electron by an ion.

And so one can find that the half life of K - 40 in interstellar space is different from the half life on Earth, because this electron capture process is very unlikely to happen.

There are basically two types of lines, those produced by collisions between the atoms or ions and the electrons in the surrounding gas, which are called collision lines, and which are very bright for elements such as oxygen, nitrogen and neon, and lines which are produced when ions capture free electrons, which are called recombination lines, and which are bright only for those gases with the highest abundances in the interstellar medium: hydrogen and helium.

A microbial fuel cell, for example, could generate electricity by capturing electrons from the bacteria on electrodes instead of the rocks that these organisms evolved to breathe.

An electron micrograph, colorized to heighten contrast, captures many aspects of the six - sided symmetry in ice crystals.

High - resolution transmission microscope (left) and scanning electron microscope images of a porous carbon sample studied for its ability to capture carbon dioxide from natural gas.

In this image, patterns captured at attosecond intervals have been superimposed, thus revealing, in real time, the kind of electron motions that underlie atomic and subatomic phenomena.

From the rotation and the nuclear motion in molecules captured in the last decades with femtosecond technology, we are now able for the first time to track in real time the response of electrons bound in atoms,» Dr. Goulielmakis pointed out.

«A prerequisite for capturing such a brief event is a light flash which can pull electrons — or to use the scientific term, polarize them — extremely quickly, and thus probe their response,» said Dr. Mohammed Hassan, a researcher in the group of Dr. Goulielmakis.

They found they could capture the essential features of these complicated materials, containing vast numbers of interacting electrons, with just a single rule: Electrons can move randomly from one atom to another within a given sample, but they can only move electrons, with just a single rule: Electrons can move randomly from one atom to another within a given sample, but they can only move Electrons can move randomly from one atom to another within a given sample, but they can only move in pairs.

The Zika virus taking hold of the inner organelles of human liver and neural stem cells has been captured via light and electron microscopy.

The second visualization was a movie captured at 23,000 - times magnification that revealed the movements of a group of nanoparticles reacting to an electron beam, which mimics the effects of the infrared radiation used in cancer therapies.

After working on the problem for years, in 1990, Henderson captured the first 3 - D image of a protein using an electron microscope.

«The name of the game is maximizing the number of electrons that get excited in the carbon nanotube, and then having a switch that is fast enough to capture them at their peak,» Cola explained.

As described in a paper just published in the Nature partner journal npj Quantum Materials, the team developed an «ultrafast electron diffraction» system — a new laser - driven imaging technique and the first of its kind in the world — to capture the subtle atomic - scale lattice distortions.

By demonstrating the presence of such coherence resulting from a capture of an incoherent electron, Prof. Krishnakumar and co-workers have shown that such coherence can also stem from the transfer of more than one value of angular momentum quanta.

This occurs when a nucleus of beryllium - 7 captures an electron and is transformed into a nucleus of lithium - 7, emitting a neutrino.

Their latest results published in the Journal, Nature Physics (DOI: 10.1038 / nphys4289), show that the coherence induced by the capture of single electron by H2 molecule results in the ejection of H?

Capture of all the transmitted electrons allows quantitative measurement of materials properties, such as internal electric and magnetic fields, which are important for use of the materials in memory and electronics applications.

In particular, electron pulse technology still has a long way to go to achieve the temporal resolution required to capture the motions of electrons inside a material.

Elizabeth Heidrich, a PhD student at Newcastle University in England and lead author of the new study, studies microbial fuel cells — devices that generate electrical current by capturing the electrons freed as bacteria break down organic matter in wastewater.

Kataoka and collaborators used two digital single - lens reflex (SLR) cameras set 8 km apart to capture 3D images of Northern Lights and determine the altitude where electrons in the atmosphere emit the light that produces aurora.

They managed to do that by capturing light in a net of carbon atoms and slowing down light it down so that it moves almost as slow as the electrons in the graphene.

A US - Chinese team of nanotechnologists used a specially outfitted transmission electron microscope to capture the footage, allowing the effect of electrical charging on nanostructures to be seen in action for the first time.

And that flip registers as a change in current passing through the device — when the spin of the phosphorus electrons is opposed to the that of the conduction electrons in the silicon sample, the phosphorus donors can capture a conduction electron and cause a measurable dip in the current.

Researchers at the University of Leeds and in Japan used electron microscopes to capture images of the largest type of motor protein, called dynein, during the act of stepping along its molecular track.

LANP researchers study light - capturing nanomaterials, including metallic nanoparticles that convert light into plasmons, waves of electrons that flow like a fluid across the particles» surface.

«But it does capture the phonon and electron movements in frames shot 100 trillion times per second, and we can string about 100 of them together just like movie frames to get a full picture of how they are linked.»

A big advantage of the technology is that it detects electrons fast enough to capture an electron movie instead of just snapping a picture.

Tully runs a prototype lab in the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) that draws on the fact that neutrinos can be captured by tritium, a radioactive isotope of hydrogen, and provide a tiny boost of energy to the electrons emitted in tritium decay.

He is specifically interested in capturing electrons more efficiently, which will help development of other useful microbial fuel cell applications.

His research specifically focuses on how to efficiently capture electrons to develop useful applications of MFCs.

An optimal enzyme system would directly transfer electrons captured from a chemical reaction to an electrode surface — ideally, to use enzymes immobilized on the surface of an electrode.

Detection of the signal via an electron multiplication CCD camera allows image capture at speeds to hundreds of frames per second as demanded today by live cell imaging.

Electrons will be used as a fast camera shutter to capture snapshots of samples as they change over femtoseconds, or quadrillionths of a second.

With funding from the National Science Foundation, Illinois Consolidated Telephone Company, and others, the University of Illinois's Beckman Institute for Advanced Science and Technology launched Bugscope, where students around the country capture insect specimens, send them to the university, and then, through the Internet, control the university's $ 600,000 environmental scanning electron microscope (ESEM) for a two - hour period to view their insects.

In addition to the motion of the video image, the analog photographer must also be sensitive to the friction betweenthe camera's straightforward light - capture process and the CRT monitor's beams of magnetized electrons, which light up pixels within the screen to present a steady image to the human eye, but whose glow registers quite differently to the camera.

In addition to the motion of the video image, the analog photographer must also be sensitive to the friction between the camera's straightforward light - capture process and the CRT monitor's beams of magnetized electrons, which light up pixels within the screen to present a steady image to the human eye, but whose glow registers quite differently to the camera.

Wikipedia: Lovelock invented the electron capture detector, which ultimately assisted in discoveries about the persistence of CFCs and their role in stratospheric ozone depletion.

«We have developed a way to interrupt photosynthesis so that we can capture the electrons before the plant uses them to make these sugars,» said Ramaraja Ramasamy, assistant professor in the UGA College of Engineering.

The visible light tries to join in the dance of the electrons, but can't, the molecule of water tries to capture the visible light, but can't, and it is this delay while they're trying which slows visible light down.

Researchers from Lawrence Berkeley National Laboratory, the University of California Berkeley, and Pacific Northwest National Laboratory have used a high - powered electron microscope to capture the birth of calcium carbonate crystals.

An ion radiates continuously due to motion of the ion in addition to the band specific radiation that is emitted when an ion captures an electron.

Ordinary atoms, once ionized by the removal of one or more electrons, also emit a continuum EM spectrum, which is not quantized, because a newly captured free electron can have any initial energy before being captured by the ion.