Word: fractionating
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Dates: during 1950-1959
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...mixed them with dilute alkaline chemicals and held them close to the freezing point for two to three days. This treatment "degraded" some of the virus, separating the rods into nucleic acid and protein molecules. Undegraded rods were taken out of the solution with an ultracentrifuge, and the protein fraction was precipitated by chemical treatment. The nucleic acid part of the virus was isolated by a slightly different method. Now neither part contained any complete virus particles. Both parts were inert chemicals, and thus had no power to infect a tobacco plant...
...fields and mass-or speed-measuring instruments) which only a particle with the anti-proton's properties could pass through. A few of the particles did pass through it, leaping every hurdle and checking in triumphantly at the far end. None lived very long, of course. After a fraction of a second, each antiproton encountered a proton or a neutron, and each destroyed the other...
...Despite their poverty, many peasant peoples smoke as many cigarettes as they can get, and often down to the last tarry fraction of an inch, without developing heart disease...
...good deal of material outside the star in the form of planets. This star-forming process is still going on in many places, notably the Orion nebula. A sequel to this theory: about 100,000 million stars in the Milky Way galaxy must have planets, and a considerable fraction of them must be suitable for life. Where life is possible, Hoyle believes, it will appear. He thinks that it may originate in the cooler gases around a newborn planet...
...behind the festival is the Metropolitan Opera's young (35) stage director, Dino Yannopoulos. Faced with a bankrupt opera company, an unenthusiastic government and a paltry $50,000 budget, Yannopoulos talked the Met stars into appearing for a fraction of their regular fees. A Greek shipowner undertook to transport the Philharmonic from Naples. Then, with only weeks to go, Yannopoulos settled down to the task of training the 96-voice chorus of Greeks to sing Italian. The results were spectacular, but Yannopoulos was not surprised. "This is the place where the chorus was born," say-he. "It should...