| 单词 | krypton |
| 例句 | Along with helium, xenon and krypton, neon was first extracted from the air in the late 1890s. 100 years of neon 2011-08-27T23:05:03Z The existing panes, rather than being ditched, were each taken out, and the gap in the double glazing was filled with an insulating gas—a mixture of argon and krypton. How to Construct Buildings That Have a Positive Impact on Climate and Biodiversity 2022-12-22T05:00:00Z The scientists tested their hypothesis with lamps containing krypton chloride gas, molecules of which release UVC radiation mainly in the 222 nm range under electrical excitation. These UV Devices Could Keep Indoor Air Free of Viruses 2022-11-22T05:00:00Z Among the products of Meitner, Hahn, and Strassman’s fission reaction were barium, krypton, lanthanum, and cerium, all of which have nuclei that are more stable than uranium-235. Chemistry 2019-02-14T00:00:00Z Noble gases such as xenon and krypton are byproducts of fission along with particles of cesium, strontium and other radioactive elements. China says nuclear fuel rods damaged, no radiation leak 2021-06-15T04:00:00Z Concentrations of krypton, argon, neon and xenon — the noble gases that do not react with other elements — may provide hints about how Venus and its atmosphere formed. New NASA Missions Will Study Venus, a World Overlooked for Decades 2021-06-02T04:00:00Z Noble gases also include neon, argon, xenon, krypton and radon. Halogen nightmares 2020-09-01T04:00:00Z In the smaller gaps of triple-pane windows, krypton gas works better. Homeowners turn to technology for more than just window dressing 2020-02-05T05:00:00Z Although zero discharge of radioactive material is desirable, the discharge of radioactive krypton and xenon, such as occurred at the Three Mile Island plant, is among the most tolerable. Chemistry 2019-02-14T00:00:00Z Researchers shot the first beams of argon and krypton last summer using three of the instruments. Michigan State nuclear research facility set to open in 2021 2019-08-03T04:00:00Z The platforms are also equipped with electric propulsion - a system that expels electrically charged atoms of krypton to provide thrust. SpaceX puts up 60 internet satellites 2019-05-23T04:00:00Z Fission products, such as radioactive caesium, strontium, xenon and krypton, must be still lingering in the tunnel. Why North Korea's denuclearization plan doesn't convince this nuclear expert 2018-05-22T04:00:00Z This summer, they will calibrate it with a sample of krypton-83, which emits electrons of a fixed energy. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z Argon, neon, krypton, and xenon come from the fractional distillation of liquid air. Chemistry 2019-02-14T00:00:00Z For example, they want to measure the planet’s inventory of stable noble gases, such as xenon and krypton, which change little in abundance over billions of years and hold clues to planetary origins. Venus can wait: Jilted scientists face years without NASA return to Earth’s neighbor 2017-01-11T05:00:00Z The discovery of both leaks was prompted by findings that showed slightly higher levels of xenon and krypton gasses in the reactor’s recirculation system. Second tiny fuel leak found at Richland nuclear plant 2015-11-25T05:00:00Z But, you know, since there wasn't any krypton at the bottom, he's able to brush it off. 1,000-foot drops? Furious 7 is a superhero movie 2015-04-05T04:00:00Z Simplicity and repetition, which are krypton to a thoughtful man like the president, are both necessary to communicate a complicated message. Obama Can't Sell Americans on Syria, Iraq or Health Care 2014-08-13T04:00:00Z It has the same number of electrons as atoms of the next noble gas, krypton, and is symbolized Br−. Chemistry 2019-02-14T00:00:00Z Using krypton gas to date the age of ancient ice cores. Physics Week in Review: April 26, 2014 2014-04-26T09:14:42Z Thank you helium, neon, argon, krypton, xenon and radon—and take a bow. Top Ten Insanely Great Science Terms 2014-03-13T19:42:20Z The evidence for the existence of krypton and xenon is, however, inconclusive. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Argon fluoride laser machinery generated 81 percent of sales, with krypton fluoride technology providing 14 percent. ASML Sets Mid-2012 Deadline for EUV Technology Performance Goal 2012-01-18T17:23:01Z But the krypton 81 isotopes were devilishly difficult to isolate and even more difficult to catch. Rare Krypton 81 Isotope Helps Track Water in Ancient Nubian Aquifer 2011-11-21T20:14:39Z Nitrogen, oxygen, argon, helium, krypton, neon and xenon can all be separated each from the others in this way, by "fractional distillation." Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z You'll have Geiger counters and a krypton analyser of course, although the analyser is no guarantee in detecting fissionable material production. The Image and the Likeness 2011-08-23T02:00:33.617Z Even so, the detector gets some deceptive signals, for instance stray neutrons from the occasional radioactive decay of atoms within the experimental apparatus and electrons from radioactive krypton contaminating the liquid xenon itself. Underground Xenon100 experiment closes in on dark matter's hiding place 2011-04-14T23:15:00.250Z In a total meltdown, several radioactive gases are released on the less-toxic end of the spectrum, including nitrogen-16, tritium and krypton. Dangers of a Damaged Nuclear Plant 2011-03-13T23:46:27Z They knew that krypton 81, an isotope present in the open air but not underground, would be a better marker for the forensic work of tracking underground water’s movement. Rare Krypton 81 Isotope Helps Track Water in Ancient Nubian Aquifer 2011-11-21T20:14:39Z This is an attribute it shares with the other elements Ramsay discovered - neon, helium, krypton and xenon. Bright spark 2011-02-09T10:33:47Z This is an attribute it shares with the other elements Ramsey discovered - neon, helium, krypton and xenon. Bright spark 2011-02-09T10:33:47Z The detector is now taking more data, they report, with fewer false positives thanks to reduced krypton contamination in the detector. Underground Xenon100 experiment closes in on dark matter's hiding place 2011-04-14T23:15:00.250Z "It so happens that if you bring a solar component in and mix it with that fractionated krypton, you get the present atmospheric composition," Pepin explains. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z Once identified and slowed, the krypton 81 isotopes are trapped by six laser beams focusing on them from the four cardinal points of the compass and from above and below. Rare Krypton 81 Isotope Helps Track Water in Ancient Nubian Aquifer 2011-11-21T20:14:39Z Those compounds and elements include gases such as argon, krypton and xenon, and the proportions of those elements in carbonaceous chondrites don't match what's found on Earth. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z Travers have obtained evidence of the existence in the atmosphere of three new gases, besides helium, to which have been assigned the names of neon, krypton and xenon. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" "Provided that the atmosphere is still a mixture of 21 parts oxygen to 78 parts nitrogen, with 1% made of small amounts of the gases neon, helium, krypton—none of these words make sense." The Buttoned Sky Krypton in today's atmosphere is somewhat heavier than solar krypton, and the krypton embedded in meteorites known as carbonaceous chondrites is even heavier than that. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z You will understand, of course, that krypton, neon, and zenon are the new gases of the atmosphere whose existence no one suspected until Professor Ramsay ferreted them out a few years ago and isolated them. A History of Science, Volume 5(of 5) Aspects Of Recent Science It was impossible for human beings to exist without the addition of those elements existing in the air in minute quantities—neon, krypton, and argon. Astounding Stories of Super-Science, August 1930 There would be traces of heavy gases—argon, neon, xenon, krypton, and volcanic carbon dioxide. The Planet Strappers That there is little actual combustion is certain; that is, except for the forced combination of nitrogen, argon, xenon, and krypton with oxygen. The Vortex Blaster "They assume that since they don't see solar-type krypton today in this one reservoir, that it was never there," Pepin says. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z The remaining elements of this group—neon, krypton, and xenon—have been obtained from liquid air. An Elementary Study of Chemistry The whole upper vault is charged with pale krypton vapours, which our skin friction may excite to unholy manifestations. Actions and Reactions In the samples of mantle gas taken by Holland and his colleagues, the krypton measurements were heavy, producing "something that looks rather like gases that are trapped in primitive chondrites today," Pepin says. Subsurface Gas Deposit Could Deflate Theory of How Earth's Atmosphere Formed 2011-01-10T07:45:41.173Z This list includes the rare elements, argon, helium, neon, krypton, and xenon; also hydrogen, ammonia, hydrogen dioxide, and probably ozone. An Elementary Study of Chemistry |
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