Word: traces
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...trace of the Old West has been discovered at ivy-towered Yale University...
Filipino sociologists trace the high incidence of political shoot-outs to the islands' rigid feudalistic society. Members of a particular clan feel great loyalty to their leader, and the duty to defend him far outweighs the legal injunction against killing. Though the candidates themselves usually counsel moderation and almost never do any shooting, their followers often feel compelled by a fierce sense of honor to avenge insults-or to ensure their leader's victory by canceling out the other names on the ballot with bullets...
...first reported that carbon dioxide comprised 98% of the Venusian atmosphere, but later revised the figure down to between 90% and 95%, closer to Mariner's reported 72% to 87%. And while Mariner could find no evidence of oxygen in the atmosphere, the Venus 4 capsule reported a trace (.4 of 1%) of oxygen and some water vapor...
...Soviet capsule also measured Venusian atmospheric pressures up to 15 times as great as the earth's and determined that the atmosphere consists almost entirely of carbon dioxide, which, scientists believe, is spewed out by volcanic activity. No trace of nitrogen (which constitutes 78% of the earth's atmosphere) and only 1.5% of oxygen and water vapor were detected. In readings made before Venus 4 entered the atmosphere, the Russians could find no evidence of a Venusian magnetic field and radiation belt...
Liquid oxygen (LOX) is used as an oxidizer in rocket engines and in steel production. Liquid hydrogen has been proposed as the fuel for the supersonic transport and as the propellant in a nuclear rocket. In bubble chambers, it allows scientists to trace the path of sub-atomic particles. Gas companies are liquefying natural gas for more convenient and economical storage, and liquid nitrogen is now used to freeze the earth around excavations so that mud will not slide into the work area...