Sentences with phrase «used hydrogen isotope»

Hallis previously used hydrogen isotope ratios in volcanic basalt rocks to conclude that Earth's water may in fact have been part of the very dust cloud from which the planet first condensed.

10:30 - 10:45 Reconstructing the past millennium of hydrologic variability in the Western Tropical Pacific using the hydrogen isotopes of lipid biomarkers Julie Richey, Julian Sachs

PEER - REVIEW STUDY ScienceDirect.com — Reconstructing tropical cyclone frequency using hydrogen isotope ratios of sedimentary n - alkanes in northern Queensland, Australia

Not exact matches

Scientists can determine where an individual piece of meat comes from using a technique called isotope analysis, looking at the specific fingerprints of carbon, hydrogen, and nitrogen atoms to see where a cow lived.

In the 1950s, deuterium was used in thermonuclear weapons because nuclear fusion of deuterium atoms (or of deuterium and the heavier hydrogen isotope, tritium) releases tremendous energy.

Collaborator David Nelson, a stable isotope ecologist with the University of Maryland Center for Environmental Science, tested the birds» feathers for stable hydrogen isotopes, which can be used to determine where the birds likely grew their feathers.

Next, Agee and his colleagues used a laser to extract water molecules trapped within minerals in the meteorite and fed them into a mass spectrometer to calculate the ratio of deuterium, a heavy isotope of hydrogen, to ordinary hydrogen.

The heart of the system is a minuscule amount of the isotope 252californium, which as it decays kicks off neutrons that can be used to detect concentrations of hydrogen in the mines.

They also used satellite precipitation data to «backsolve» the brine's origins using sodium concentrations, oxygen and hydrogen isotopes, as the isotopic composition of water reflects the condensation temperature and precipitation rate over time.

To understand the origin of Earth's water, scientists have fingerprinted potential sources, like asteroids and comets, using the ratio of light to heavy hydrogen isotopes.

Inertial confinement fusion (ICF) seeks to create those conditions by taking a tiny capsule of fusion fuel (typically a mixture of the hydrogen isotopes deuterium and tritium) and crushing it at high speed using some form of «driver,» such as lasers, particle beams, or magnetic pulses.

University of Utah physicists read the subatomic «spins» in the centers or nuclei of hydrogen isotopes, and used the data to control current that powered light in a cheap, plastic LED — at room temperature and without strong magnetic fields.

The experimental fusion reactors now being built around the world use a fuel composed of a plasma of two isotopes of hydrogen — deuterium and tritium.

Herein we demonstrate that a photoredox - mediated hydrogen atom transfer protocol can efficiently and selectively install deuterium (D) and tritium (T) at α - amino sp3 carbon - hydrogen bonds in a single step, using isotopically labeled water (D2O or T2O) as the source of hydrogen isotope.

University of Utah physicists used this kind of OLED — basically a plastic LED instead of a conventional silicon semiconductor LED — to show that they could read the subatomic «spins» in the center or nuclei of hydrogen isotopes and use those spins to control current to the OLED.

In the new experiments, the physicists used magnetic resonance to reverse the nuclear spins in hydrogen isotopes embedded in the OLED, and then were able to detect how the reversed spins caused a change in the electrical current through the OLED.

Most fusion research focuses on magnetic confinement, using powerful electromagnets to contain a thin plasma of hydrogen isotopes and heat it until the nuclei fuse.

The aim of ITER is to show that, in theory, nuclei of deuterium and tritium (isotopes of hydrogen) can be fused in a searingly hot plasma at the heart of the reactor, thereby releasing large quantities of heat that could be used to generate power.

NIF uses the world's highest energy laser to crush peppercorn - sized targets filled with fusion fuel (a combination of hydrogen isotopes) to a temperature and pressure greater than in the core of the sun.

The article discussing the possibility of generating energy using small - scale nuclear fusion suggested that both deuterium and tritium are stable isotopes of hydrogen.

Specifically, they measured hydrogen and its isotope, deuterium (hydrogen with an extra neutron in its nucleus) with ion microprobes, which use a focused beam of ions to sputter ions from a small rock sample into a mass spectrometer.

SNO uses «heavy water» (in which the isotope deuterium replaces «normal» hydrogen) to detect all three flavors of neutrinos.

The study by Louie Yang (Dept. Entomology at UC - Davis) used stable hydrogen isotope analysis to test tissue samples from 114 butterflies at 4 overwintering locations.

Isotopes of hydrogen are used to show what isotoIsotopes of hydrogen are used to show what isotopesisotopes are.

The sources of methane variations can be estimated using the interpolar gradient (for the last climatic cycle, using Greenland - Antarctic ice core differences after age scale synchronization) and also using stable isotopes of carbon and hydrogen of methane.

1) M&W used the first, not realizing that those aren't the exact words from Bradley, which is «major ions and isotopes of hydrogen and oxygen», which is parsed (major ions) and (isotopes of H and O), because «major ions» in thsi context has a specific meaning and it has nothing to do with H&O.

But not with (ions and isotopes) of (hydrogen and oxygen), and speleotherms (when Bradley never uses that), and the odd «artifacts.»

• «Ions and isotopes of hydrogen and oxygen» uses the WR's meaning - changed miscopy of Bradley, as «ions» is not the same as «major ions.»

One tiny problem, Skip: according to M&W it's done using isotopes of oxygen and hydrogen... so, I'm still waiting for a reference.