| 单词 | pitchblende |
| 例句 | He tested a piece of pitchblende, the principal ore of uranium, and found it to be 700 million years old–very much older than the age most people were prepared to grant the Earth. A Short History of Nearly Everything 2003-05-06T00:00:00Z Rutherford was there to talk about his new disintegration theory of radioactivity, as part of which he brought out his piece of pitchblende. A Short History of Nearly Everything 2003-05-06T00:00:00Z The elements were found in a mineral called pitchblende that released a powerful form of energy. World History: Patterns of Interaction 2012-01-01T00:00:00Z We watch the husband-wife team as they conducted painstaking experiments in their underfunded labs and endured back-breaking labor to shovel, crush and boil tons of pitchblende ore to measure signs of radioactivity hidden within. The Film Radioactive Shows how Marie Curie Was a "Woman of the Future." 2020-08-09T04:00:00Z To investigate uranium at their Paris laboratory, Marie acquired several tons of pitchblende, a black ore, and the industrial waste product left over when uranium was removed from it. Review: A Marie Curie biopic in ‘Radioactive’ 2020-07-22T04:00:00Z She came across pitchblende, an ore with radioactivity that was too strong to be explained by uranium alone. Celebrate the women behind the periodic table 2019-01-27T05:00:00Z It is a constituent of pitchblende, which is found in many places, but only in a small way. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Even in pitchblende only one molecule in 109 seems to be of radium, renewable, however, when lost, by internal transformation. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z These veins are veins of pitchblende which are found hardly anywhere in Europe except in the north of Bohemia and which are worked near the little town of Joachimsthal. The Secret of Sarek 2011-01-14T03:00:49.903Z Discovery of Radium In a similar manner a barium precipitate was obtained from pitchblende which contained a highly active substance. A Brief Account of Radio-activity Klaproth’s detection of a previously unknown constituent of the mineral pitchblende. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A ton of pitchblende carries about 15½ grains of radium and it is very difficult to extract. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z If I bring a bit of radioactive substance, for instance, pitchblende, near the electroscope, the charge will leak rapidly. Astounding Stories, May, 1931 It is a pitchblende deposit, and it happens to be so rich in radium content that throughout the ages it has affected all the life in the cavern. Astounding Stories of Super-Science, June, 1930 Starting with pitchblende, a systematic chemical examination was made. A Brief Account of Radio-activity Autunite is usually found with pitchblende and other uranium minerals, or with ores of silver, tin and iron; it sometimes coats joint-planes in gneiss and pegmatite. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Suppose a bearer of the Medal of Honor formed a stock corporation to exploit the pitchblende of Callisto. Medal of Honor Down in the deepest pitchblende mines, where particles of radium have been hidden away since the creation of the world, they are still found shining with their strange blue light. The Life Radiant We know that that louse Caron of Mars doesn't want it to, since pitchblende was discovered. A World is Born In one ton of pitchblende about 0.2 gram of radium is present; this is about 5000 times greater than the amount of polonium present. A Brief Account of Radio-activity The colony on Ganymede was more of a supply depot than a permanent settlement, with one large uranium refinery to convert the pitchblende brought in by the prospectors of the asteroids. On the Trail of the Space Pirates The project at hand is to extract the newly discovered deposits of pitchblende on these satellites of Jupiter. Medal of Honor The scarcity of the metal will be understood when it is stated that there is far less radium in pitchblende than gold in ordinary sea water. The Life Radiant There are mines rich in copper and pitchblende. A World is Born The radium found is relatively enormously more active than the pitchblende or uranium. A Brief Account of Radio-activity Bull Coxine and Gus Wallace got together after me and Wallace lost our stake hunting for uranium pitchblende in the asteroids and split up. On the Trail of the Space Pirates In 1896 the French scientist Becquerel observed that the mineral pitchblende possesses certain remarkable properties. An Elementary Study of Chemistry The result was a photograph, where the black pitchblende appeared light owing to the emanations from the radium contained in it. The Life Radiant They found a certain kind of pitchblende which was very active, and they analysed tons of it, concentrating always on the radiant element in it. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told Spaceman's Row was where suspended spacemen and space rats, prospectors of the asteroids for uranium and pitchblende, gathered and found short-lived and rowdy fun. Danger in Deep Space In the mad rush for the uranium-yielding pitchblende, they had swarmed over the deserts toward the dwarf mountains by the thousands. Stand by for Mars! In 1898 Madam Curie made a careful study of pitchblende to see if these properties belong to it or to some unknown substance contained in it. An Elementary Study of Chemistry In total darkness I laid a piece of pitchblende—the ore from which radium is extracted—face down upon a sensitized plate, and let it act with its own light for twenty-four hours. The Life Radiant In the end they extracted from eight tons of pitchblende about half a teaspoonful of something that was a million times more radiant than uranium. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told I was prospecting near by for pitchblende, back when everybody thought Venus was loaded with it. Danger in Deep Space These cliffs proved, as Bennie had already suspected, to be a gigantic outcrop of pitchblende or black oxide of uranium. The Man Who Rocked the Earth "Like flushing quail in Venus jungles," he said, moving away from the door and down into the hold where the lead boxes filled with uranium pitchblende were stored. Treachery in Outer Space Uranium pitchblende isn't concentrated enough to cause a reaction like that on the instruments. The Space Pioneers Two other bodies, polonium and actinium, the one characterised by the special nature of the radiations it emits and the other by a particular spectrum, seem likewise to exist in pitchblende. The New Physics and Its Evolution Radium is the most abundant of these substances; but only a very few grains of radium chloride can be obtained from a couple of tons of pitchblende. The Story of Alchemy and the Beginnings of Chemistry And he had some of that concentrated essence of pitchblende in the chest when we started. The Mystery "What about that investigation?" asked Miles, keeping his eyes on the cadets, who were now staggering back to the stairs, each carrying a heavy lead box containing the precious uranium pitchblende. Treachery in Outer Space It was the one oasis of sentiment in the Sahara of her mental outlook, the grain of radium in the pitchblende. The Prince and Betty Finally in the ore of pitchblende they found not only one but three substances highly radio-active. Marvels of Modern Science Radium does not seemingly manifest itself when distributed through pitchblende; and there are doubtless other such substances in which it can be imprisoned. The Jewel of Seven Stars Around the two men was ample evidence of Astro's original assumption that they were digging into a hot vein of uranium pitchblende. Treachery in Outer Space "But what are you doing here with this load of pitchblende?" Treachery in Outer Space To that which accompanied barium taken from the same ore they called Radium and to the substance which was found among the rare earths of the pitchblende Debierne gave the name Actinium. Marvels of Modern Science To the radio-active substance which accompanied the bismuth extracted from pitchblende the Curies gave the name Polonium. Marvels of Modern Science The process of obtaining radium from pitchblende is most tedious and laborious and requires much patience. Marvels of Modern Science To get enough to weigh a single grain requires the treatment of 1,200 pounds of pitchblende. Marvels of Modern Science Listen, punk, with a murder charge hanging over our heads, and a couple of million credits' worth of pitchblende in the holds, both of us would do anything! Treachery in Outer Space Curie, is just as active as radium when first extracted from the pitchblende but its energy soon lessens and finally it becomes inert, hence there has been little experimenting or investigation. Marvels of Modern Science |
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