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...chromosome closeups were made by German scientists at the University of Münster, using the recently developed scanning electron microscope. Unlike the conventional electron microscope, which forms an image by passing an electron beam through extremely thin slices of a specimen, the scanning device plays a fine electron beam back and forth across the surface of the object being examined. Electrons knocked out of the surface of the specimen by the scanning beam are collected and converted into signals that are projected on a television screen in the form of a picture...
Servant or Scourge? The most determined opponent of sonic boom-and of the nation's plans to build a supersonic transport (SST)-is Harvard Physicist William Shurcliff, 58, who worked on the atomic bomb with Vannevar Bush, and is now senior research associate at the Cambridge Electron Accelerator. Six months ago, Shurcliff, with nine friends, founded the Citizen's League Against the Sonic Boom, and membership has since grown to 1,320 in 45 states. In letters to members and newspaper ads, Shurcliff has propounded his fears that the SST might ultimately be permitted to fly at supersonic...
...value of his cause, was new to public relations and unsure of his group's image. A scientist standing in the way of apparent progress? He was cautious in dealing with the press, and spent long evenings preparing press releases after a day's work at the Cambridge Electron Accelerator, where he is Senior Research Associate...
...linear accelerator to bombard a tiny amount of einsteinium (a transuranium element discovered in 1952) with alpha particles which consist of two protons and two neutrons. "We expected the alpha particles to join with the heavier isotope of einsteinium," says Hulet, "and then decay by a process called 'electron capture' to fermium...
...stress, a solid-state chemical reaction is triggered that blunts small cracks just as they begin, then fills them in to prevent major wounds. The chemical change precipitating this "self-healing" process takes place on a near-atomic scale, and can be observed only with the aid of an electron microscope. The actual halting and filling in of a crack, however, can sometimes be seen with the naked...