| 单词 | Seaborg |
| 例句 | At last, by Seaborg’s reckoning, they had one quarter of a millionth of a gram of element 94. Big Science 2015-07-07T00:00:00Z At the end of November, Seaborg reached him by letter with a proposal to collaborate on the search for 94 in McMillan’s absence. Big Science 2015-07-07T00:00:00Z With Lawrence’s endorsement, Seaborg’s project was awarded top priority for time on the Crocker Cracker. Big Science 2015-07-07T00:00:00Z Seaborg, who lived down the hall, was enthralled. Big Science 2015-07-07T00:00:00Z Kamen soon was drafted by the physicist Jackson Laslett to help with the chemical separation of sodium isotopes, and the chemist Glenn Seaborg was absorbed into a team working with uranium. Big Science 2015-07-07T00:00:00Z With its bulldozer-graded streets and its rows of prefab houses, Oak Ridge looked like an “unfinished movie set,” recalled Seaborg. Big Science 2015-07-07T00:00:00Z Seaborg’s group started referring to element 94 as “copper.” Big Science 2015-07-07T00:00:00Z As Seaborg reported in his journal, it was the first time that plutonium—indeed, any synthetic element—had been seen by the naked eye. Big Science 2015-07-07T00:00:00Z One day in early March, Seaborg and Segre carried a hot sample of bombarded uranium out of the Crocker Lab in a lead bucket suspended from a long pole. Big Science 2015-07-07T00:00:00Z Seaborg got the news at his office across campus. Big Science 2015-07-07T00:00:00Z While the refinement and construction of the uranium plants were taking place, Glenn Seaborg ran his own race to perfect a plutonium extraction process. Big Science 2015-07-07T00:00:00Z Seaborg never lost his respect for the substance that would make his career. Big Science 2015-07-07T00:00:00Z The subject boiled down to this: Could Seaborg devise a chemical process for separating element 94 from the stew of radioactive fission products in which it was mixed after the bombardment of uranium? Big Science 2015-07-07T00:00:00Z Chemistry skills like Seaborg’s were coming into demand at the Rad Lab. Big Science 2015-07-07T00:00:00Z A few weeks after Pearl Harbor, Arthur Compton summoned Seaborg to Chicago for a heart-to-heart talk. Big Science 2015-07-07T00:00:00Z “Glenn Seaborg is a very competent young chemist,” he said, “but he isn’t that good.” Big Science 2015-07-07T00:00:00Z Ernest’s genius, Seaborg perceived, was to draw into his orbit like-minded scientists in every field, not just physics, and imbue them with his own drive to build and perfect his magnificent invention. Big Science 2015-07-07T00:00:00Z One day he told Seaborg triumphantly that he had found an alpha emitter and had already ruled out that it could be an isotope of element 91, 92, or 93. Big Science 2015-07-07T00:00:00Z “Seaborg tells me that within six months from the time plutonium is formed, he can have it available for use in the bomb.” Big Science 2015-07-07T00:00:00Z Luckily, Seaborg did not need a kilogram of plutonium just then, only a few micrograms. Big Science 2015-07-07T00:00:00Z By then, Seaborg would observe, the existence of element 94 had been revealed to the world “in the most dramatic form possible”: with a detonation in the skies above Nagasaki, Japan. Big Science 2015-07-07T00:00:00Z Seaborg’s group commandeered the cyclotron to bombard uranium twenty-four hours a day. Big Science 2015-07-07T00:00:00Z Among the scientists who made the transition with ease was Glenn Seaborg, whose research would prove to be among the most important in the war. Big Science 2015-07-07T00:00:00Z Once he settled on a production method, Seaborg beat the deadline by four months. Big Science 2015-07-07T00:00:00Z Some of the boxes had broken open on the way, spilling hot uranium over the truck bed; Seaborg advised his assistants to wear rubber gloves to sweep up the detritus. Big Science 2015-07-07T00:00:00Z Seaborg joined with Joseph Kennedy, a newly appointed chemistry instructor with the gangly physique of a scarecrow and a gentle drawl that proclaimed his North Texas origins, and brought the plan to Ernest. Big Science 2015-07-07T00:00:00Z Glenn Seaborg, the discoverer of element 94, was relaxing in his room at the Faculty Club, listening to a football game on the radio. Big Science 2015-07-07T00:00:00Z A further calculation gave Seaborg pause: the irradiated uranium would be ferociously radioactive. Big Science 2015-07-07T00:00:00Z Like his colleagues, Seaborg never forgot where he was the moment he first heard about fission: in his case, at Lawrence’s Monday Journal Club. Big Science 2015-07-07T00:00:00Z Seaborg’s microchemists used hydrofluoric acid to reduce a solution made from the bombardment products and watched a minuscule quantity of pinkish material precipitate out: this was pure plutonium-239. Big Science 2015-07-07T00:00:00Z Seaborg was as awestruck by the immensity of the Hanford plant as Lawrence had been on witnessing the transformation of Oak Ridge. Big Science 2015-07-07T00:00:00Z Seaborg had accepted an appointment at Berkeley as a full professor, with the authority to hire four assistant and associate professors and twelve salaried graduate fellows. Big Science 2015-07-07T00:00:00Z Seaborg’s next step was to test the new element’s fission cross section— in other words, to determine whether it could sustain a chain reaction and make a bomb. Big Science 2015-07-07T00:00:00Z On June 1, six months after Fermi’s achievement, Seaborg met with executives of DuPont, which had been cajoled by Groves into contracting to build a pilot plutonium separation plant at Oak Ridge. Big Science 2015-07-07T00:00:00Z When Seaborg was ten, his parents fled the meager opportunities of Ishpeming, relocating to a small community just south of Los Angeles. Big Science 2015-07-07T00:00:00Z Lawrence pried the necessary salary and staff approvals from Sproul, and committed himself personally to finding money to build Seaborg’s hot lab and reactor. Big Science 2015-07-07T00:00:00Z Glenn Seaborg, whose work with plutonium was still conducted under strict government security, was more candid about his capitulation. Big Science 2015-07-07T00:00:00Z In no time, Seaborg became one of the Rad Lab’s reigning radiochemistry experts while also serving as Lewis’s personal research assistant. Big Science 2015-07-07T00:00:00Z Glenn Seaborg arrived in Chicago to take up his assignment from Compton on Sunday, April 19, 1942. Big Science 2015-07-07T00:00:00Z Lawrence tried to communicate his excitement about Seaborg’s discovery in writing, via a memo to Jewett’s committee declaring that “an extremely important new possibility has been opened for the exploitation of the chain reaction.” Big Science 2015-07-07T00:00:00Z From left: J. Robert Oppenheimer, newly appointed to head the Manhattan Project’s bomb design lab at Los Alamos; future Nobelist Glenn Seaborg, developing plutonium for the bomb program; and Lawrence inspect the machine’s control console. Big Science 2015-07-07T00:00:00Z By January 20, 1942, Seaborg was confident enough to write McMillan with assurance that the bombardments had produced an unknown isotope of element 94. Big Science 2015-07-07T00:00:00Z By transmuting common uranium into a fissionable product that could be extracted chemically, Seaborg calculated, they could increase the supply of raw material available for a bomb by a hundredfold. Big Science 2015-07-07T00:00:00Z Seaborg’s early life told the same quintessentially American story of immigration and assimilation as Ernest Lawrence’s, although his upbringing was rather more insular and culturally constrained than that in the Lawrences’ educated household. Big Science 2015-07-07T00:00:00Z Of his actual discovery, Seaborg later told an Associated Press reporter, “I didn’t think, ‘My God, we’ve changed the history of the world.’” A Forgotten Town at the Center of the Manhattan Project 2020-07-28T04:00:00Z Glenn Seaborg, an American chemist and physicist, received the Nobel Prize in physics in 1951 for discovery of several transuranic elements, including plutonium. College Physics for AP Courses 2015-08-12T00:00:00Z Plutonium was detected in trace amounts in natural uranium deposits by Glenn Seaborg and his associates in 1941. Chemistry 2019-02-14T00:00:00Z In Seaborg's case their reactors will be housed on floating barges and use molten salt to moderate reactions. The small nuclear power plants billed as an energy fix 2021-11-18T05:00:00Z Although his family arrived in Watts from Mississippi in the mid-1950s, he knew a woman who went to school in the 1920s with Seaborg. Watts' Jordan High cuts association with promoter of eugenics but keeps partial name 2020-10-08T04:00:00Z The preferred bomb material was Plutonium-239, which had been discovered and isolated at Berkeley by Glenn Seaborg. Column: 75 years ago today, the Trinity A-Bomb test ushered in the era of nuclear warfare 2020-07-16T04:00:00Z Later, in a Berkeley laboratory, the physicist Glenn Seaborg and his colleagues detected two hundred atoms of what would become element No. 99 in a filter pulled from one of the planes. The Histories Hidden in the Periodic Table 2019-12-27T05:00:00Z Among UC’s graduates in the era before tuition were Earl Warren, a governor and chief justice, diplomat Ralph Bunche, Los Angeles Mayor Tom Bradley, physicist Glenn Seaborg, and writer Maxine Hong Kingston. Column: Buttigieg is wrong--Free college should be free for all, including children of the rich 2019-12-02T05:00:00Z Seaborg shared the 1951 Nobel Prize in Chemistry for his work in this field. 1969: We Used Flints for Threshing; 1919: We Wanted Airships for Travel 2019-04-04T04:00:00Z There, he worked with a young chemist, Glenn Seaborg, to isolate an unusual, metastable isotope of his new element5. The first synthetic element 2019-01-27T05:00:00Z The chemist Glenn Seaborg, who discovered plutonium and eventually became the chairman of the Atomic Energy Commission, later called Baker “the world’s first nuclear disaster.” America at the Atomic Crossroads 2016-07-25T04:00:00Z The first was element 106, seaborgium, named for Glenn T. Seaborg. Four Elements on the Periodic Table Get New Names 2016-06-08T04:00:00Z The first such occasion led to huge controversy, when in 1993 a team at the Lawrence Berkeley National Laboratory proposed naming element 106 seaborgium for US nuclear-chemistry pioneer Glenn Seaborg. Four new element names proposed for periodic table 2016-06-07T04:00:00Z Seaborgium was named after his colleague Glenn Seaborg, a nuclear scientist. Godzillium vs. Trumpium: Some Suggestions to Add to the Periodic Table 2016-01-14T05:00:00Z But arguably the greatest discovery remains technetium, and the metastable isotope of the element that Segrè discovered with Seaborg. The first synthetic element 2019-01-27T05:00:00Z At Berkeley that year, Seaborg, along with Arthur Wahl and Joseph Kennedy, synthesized an entirely new element: plutonium. Manhattan Project Plutonium, Lost to Obscurity, Recovered by Scientists 2015-01-15T05:00:00Z Glenn Seaborg was immortalised in his lifetime by element 106, seaborgium, which he considered a far greater honour than the Nobel Prize he won along with McMillan in 1951. The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z Glenn Seaborg, who shared the 1951 Nobel Prize in Chemistry for his work with heavy elements and who died in 1999, was the senior author on the resulting study. Fact or Fiction?: Lead Can Be Turned into Gold 2014-02-06T12:00:00Z You've just got to do what Oppenheimer, Fermi and Seaborg did, OK? Can the U.S. Build a Better Battery Maker? 2012-12-05T17:15:00.220Z The chairman of the Atomic Energy Commission, Glenn T. Seaborg, questioned the measure’s legality. City Room: New York's Nuclear Future That Almost Came to Be 2011-04-13T11:52:56Z And for more about the development of the atomic bomb visit the Atomic Heritage Foundation’s collection of interviews—including one with Seaborg—at Voices of the Manhattan Project. Manhattan Project Plutonium, Lost to Obscurity, Recovered by Scientists 2015-01-15T05:00:00Z It was well earned, says Prof Nitsche, for Seaborg's impact on the periodic table went much further than just seaborgium or Pu. The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z Seaborg served as a Science Talent Search judge for decades. New Stars of Science Honored in D.C. 2011-03-16T15:36:00Z Seaborg's colleagues counselled him to keep his heretical views quiet, lest he destroy his reputation. The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z Seaborg told him that he didn't believe that anyone in the Commission was responsible for the experiments. The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z Prof Seaborg playfully suggested that this be abbreviated to Pu - "poo". The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z He managed to secure an interview with a then venerable Glenn Seaborg, who had been head of the Atomic Energy Commission that co-ordinated this radiation research. The scary element that saved the crew of Apollo 13 2014-09-19T04:00:00Z Finalist Shubhro Saha, 17, of Avon, Conn., was elected by the other finalists to receive the Glenn T. Seaborg award, named for the late chemist who won the Nobel Prize in Chemistry in 1951. New Stars of Science Honored in D.C. 2011-03-16T15:36:00Z |
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