Word: nucleus
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Scientists can now turn their attention to solving another radiation-belt enigma: although one out of 20 particles in the solar wind is a positively charged helium nucleus, or alpha particle, only three can be found for every 10,000 particles in the outer belt. "For some reason," says Van Allen, "the process that pulls electrons and protons into the magnetic field seems to discriminate against alpha particles. We hope to find...
Lillian Hellman locks the tyrants and their victims into one family and plants it in a small Southern town. Regina and her brother Ben and Oscar, the nucleus of the family, vie among themselves for the position of Chief of the Wealth--struggling at the same time to keep their various relatives in line. Their disciplinary measures take effect. Everyone married and born to the trio is timid or ill when the lights...
With the Cultural Revolution, Mao originally intended to sweep away the musty party machinery and replace it with a more revolutionary and popular-based organization. The nucleus of his new organization-a "grand alliance" of loyal government workers, military men and Red Guards-is well established in Pe king, Shanghai and five of China's 26 provinces and regions. But in other areas, the Cultural Revolution has only succeeded in breaking down local organization without supplanting it with any workable substitute...
...movement seems to be strongest among Roman Catholics-although most cells ecumenically include Protestants, Jews and even atheists. A few operate with quasi-official approval. On Chicago's South Side, for example, 40 members of St. Philip Neri Catholic Church, including one of its assistant pastors, form the nucleus of an underground congregation called Vatican 21. Why the name? Explains Robert Keeley, 29, a schoolteacher: "The church was supposed to be carrying out the spirit of Vatican II, instead all we got was Vacuum II." The cell conducts its own baptisms-the whole contingent turning out to sing hymns...
...understands why mendelevium 258 is so long-lived. "It's possible," speculates Hulet, "that because of the structure of the nucleus, certain kinds of decay are hindered." Whatever the reason, scientists are delighted. The long half life will enable them eventually to accumulate more substantial amounts of the new isotope and to study its properties at leisure. Even more important, mendelevium stays around long enough to make a good target for high-velocity particle accelerators. And it is by the bombardment of uranium and transuranium elements that even heavier elements and their isotopes have been created...