Sentences with phrase «deuterium for»

But when Curiosity's Sample Analysis at Mars experiment (SAM) vaporised Martian soil, it found a ratio five times higher: one deuterium for every 1284 hydrogens.

To test the idea, Shchepinov and colleagues substituted deuterium for regular hydrogen in two essential dietary fatty acids and introduced them into yeast cells.

Not exact matches

You compress the hydrogen and you get conditions when fusion is happening, when tritium and deuterium, special forms of hydrogen, start fusing together making helium, which we have a term for, an alpha - particle.

Adjust your pink spectacles; the raw materials for laser fusion are small amounts of tritium and deuterium.

Evidence for Stratification of Deuterium - Tritium Fuel in Inertial Confinement Fusion Implosions

Actually, stuff couldn't exist until the universe colled down enough for protons and neutrons to coalesce into deuterium.

The International Astronomical Union defines «planet» as a celestial body that, within the Solar System that is in orbit around the Sun; has sufficient mass for its self - gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape; and has cleared the neighbourhood around its orbit; or within another system, it is in orbit around a star or stellar remnants; has a mass below the limiting mass for thermonuclear fusion of deuterium; and is above the minimum mass / size requirement for planetary status in the Solar System.

The next step is to create spherical pellets of deuterium and tritium — the key ingredients for fusion (Science, DOI: 10.1126 / science.1185634).

The team succeeded by using deuteration, or the substitution of deuterium atoms for hydrogen atoms, to study how hydroxyl is produced.

The deuterium provides a clear «fingerprint» for what plants contribute to the process, he says.

Clive Semmens's fear that a deuterium - tritium fusion reactor can't produce enough tritium for its own needs is unjustified (15 March,...

Clive Semmens's fear that a deuterium - tritium fusion reactor can't produce enough tritium for its own needs is unjustified (15 March, p 32).

Momota is less generous: «I have known for 20 years that deuterium - tritium fusion can never be commercialised,» he says.

One common technique for tracking a drug's fate is to label its molecular framework with heavier isotopes of hydrogen (either deuterium or tritium).

This protocol has been successfully applied to the high incorporation of deuterium and tritium in 18 drug molecules, which meet the requirements for use in ligand - binding assays and absorption, distribution, metabolism, and excretion studies.

For example, in our oceans, there is one deuterium atom to every 6420 hydrogen atoms.

The authors looked for a very rare molecule of doubly isotope - substituted methane, known as 13CH3D — a molecule with both an atom of carbon - 13 and a deuterium atom.

This is a schematic image of trapped electron instability and the mechanism for the suppression of turbulence in deuterium plasma.

Yet, even today he doesn't know how a commercial energy source could be constructed for the palladium - deuterium system, despite his many experiments that have produced significant excess heat correlated with helium production.

Odorants such as acetophenone and deuterated acetophenone, for example, have the same molecular structure; one is just built from a slightly heavier hydrogen atom, known as deuterium.

Sometime within the next year or two, for a few billionths of a second, those beams will focus 500 trillion watts on a pellet of deuterium and tritium housed inside a little capsule about the size of an Advil tablet.

A triple - product value of 7 x 1024 electron volt - seconds per cubic meter is required for an ignited, deuterium - tritium reactor.

Development of neutral beam injection (NBI) heating system utilizing a hydrogen / deuterium (H / D) negative ion source, is significant for a fusion plasma reactor, which is one of the potential solutions to future energy - resource problems.

JET researchers are testing how the machine behaves when filled with individual hydrogen isotopes before attempting burns with deuterium and tritium — the fuel for fusion — in 2019.

If you have a proton and two neutrons, that's tritium and for various technical reasons, it's much easier to make deuterium and tritium come together to produce fusion.

Inside ITER's enormous, doughnut - shaped reactor walls, magnetic fields, electric currents, microwaves, and particle beams will heat a deuterium - tritium plasma to fusion temperatures for about 20 minutes.

In addition, evidence for neutron emission near 2.5 million electron volts was also observed, as would be expected for deuterium - deuterium fusion.

Variations of deuterium (δD; black), a proxy for local temperature, and the atmospheric concentrations of the greenhouse gases CO2 (red), CH4 (blue), and nitrous oxide (N2O; green) derived from air trapped within ice cores from Antarctica and from recent atmospheric measurements (Petit et al., 1999; Indermühle et al., 2000; EPICA community members, 2004; Spahni et al., 2005; Siegenthaler et al., 2005a, b).

He came to the Laboratory during a challenging time when the Lab was preparing the TFTR for experiments with deuterium and tritium, recalls Dale Meade, who was deputy director at that time.

«The D / H [deuterium - to - hydrogen] value [for water locked in Martian clays] is 3.0 (± 0.2) times the ratio in standard mean ocean water.»

Davidson led PPPL when TFTR began using a mixture of half deuterium and half tritium for fuel in 1993.

In principle, odorant isotopomers provide a possible test of shape vs. vibration mechanisms: replacing, for example, hydrogen with deuterium in an odorant leaves the ground - state conformation of the molecule unaltered while doubling atomic mass and so altering the frequency of all its vibrational modes to a greater or lesser extent [11].

Subzero temperature chromatography for reduced back - exchange and improved dynamic range in amide hydrogen / deuterium exchange mass spectrometry.

It shows the correlation between atmospheric partial pressure of CO2 for the last 420,000 years and the deuterium - based air temperature anomaly.

This is the case for the hydrogen / deuterium ratio.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

The basic fuel for fusion is deuterium, a form of hydrogen easily separated from ordinary seawater.

In the first plot, the change in the deuterium concentration was «adjusted» to account for changes in the amount of deuterium in the oceans.

Compilation of Vostok and EPICA Dome C CO2 concentrations (Petit et al., 1999; Siegenthaler et al., 2005) and δD (deuterium isotope record) as a proxy for local air temperature (Petit et al., 1999; Augustin et al., 2004) and the changes in global sea level relative to the present level (Bintanja et al., 2005).

Human civilization can flourish for centuries and millennia on energy delivered from a closed uranium or thorium fuel cycle, or from hydrogen - deuterium fusion.

For fusion, the fuel is two isotopes of hydrogen, deuterium and tritium, the first of which can be extracted from seawater and the second from lithium, whose resources are large and growing.

Old positive feedback examples in climate change... «Feedback Loops In Global Climate Change Point To A Very Hot 21st Century Using deuterium - corrected temperature records for the ice cores, which yield hemispheric rather than local temperature conditions, GCM climate sensitivity, and a mathematical formula for quantifying feedback effects, Torn and Harte calculated the magnitude of the greenhouse gas - temperature feedback on temperature.»

The black line shows a proxy for local temperature (deuterium), the green line is nitrous oxide, the red line is CO2, the blue line is methane, and the gray line is a proxy for land ice (low = more glaciers / larger ice caps).