Marie Curie doubt, the Curies sought to isolate polonium and radium in pure form. Pitchblende is a complex mineral; the chemical separation of its constituents was an arduous task. The discovery of polonium had been relatively easy; chemically it resembles the element bismuth, and polonium was the only bismuth-like substance in the ore. Radium, however, was more elusive; it is closely related chemically to barium, and pitchblende contains both elements. By 1898 the Curies had obtained traces of radium, but appreciable quantities, uncontaminated with barium, were still beyond reach. The Curies undertook the arduous task of separating out radium salt by differential
DISCover DISCover Digital Interactive Systems Corporation (or DISCover) is a company specializing in gaming technology for PCs. They are the creators of the DISCover technology which allow PC games to be played like a video game console. The technology, which features the "Drop and Play" engine, auto-plays CDs or DVDs and automates scripts for installing and updating games. Consoles with the engine connect to the Internet for game updates. This technology debuted at the 2003 Electronic Entertainment Expo. Machines using DISCover technology include the Apex Extreme, Alienware DHS 2 and DHS 5. In August 2007, DISCover announced that their Hardcore White-Label