Word: gamma
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...companies to solve the problem. Starting next summer, the FAA will receive five new devices developed by San Diego-based Science Applications International Corp. for screening checked luggage. The machine bombards luggage with neutrons that interact with the nitrogen in explosives, touching off a characteristic pattern of gamma rays. In tests conducted last summer at Los Angeles and San Francisco airports, the devices spotted more than 95% of suitcases containing test samples of explosive materials. But because they employ dangerous radiation, the machines, which cost as much as $1 million each, cannot be used on passengers...
Last winter, the university's Phi Gamma Delta fraternity advertised a tropical island party with a Black caricature on a sign on its front lawn. The incident resulted in scuffles between minority students and Phi Gamma Delta members...
Senior Kelley Gulley, president of the sorority Delta Gamma, said that "there is not a lot of racism on campus...There are are no integrated sororities, but it hasn't been a problem." She added that two Black women had rushed for her sorority this fall, but neither is currently a member...
While the other astronauts continued to check out Discovery's systems, Pinky Nelson began the first of eleven science experiments: growing crystals, which form more precisely in zero gravity, of specialized proteins such as gamma interferon and an enzyme found in the AIDS virus. By studying the crystals, scientists at the Center for Macromolecular Crystallography at the University of Alabama-Birmingham hope to learn more about the structure of the proteins, which may enable researchers to create new disease-fighting drugs. Other experiments scheduled during the mission included the production and study of crystalline organic thin films, evaluation...
...substances and use them, sometimes in combined "cocktails," to boost the immune system against specific diseases. In clinical trials at Boston's New England Deaconess Hospital, Dr. Jerome Groopman has found that granulocyte-macrophage colony-stimulating factor reverses bone-marrow failure and boosts white-cell counts in AIDS patients. Gamma interferon seems to remedy the defective functioning of monocytes and macrophages in a wide variety of diseases. Alpha interferon has been particularly effective against two types of leukemia and non-Hodgkin's lymphoma, a cancer of the lymph system. Says Dr. Jordan Gutterman, of Houston's M.D. Anderson Hospital...