Word: emits
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
Such trees as fragrant pine and plants such as pungent sage produce the "blue haze" that occurs during summer, even over relatively uninhabited areas of land. They emit molecular substances known as terpenes and esters, which react with sunlight to form a smog similar to the one produced by man-made pollutants. Terpenes, says Went, like some industrial and automobile pollutants, are "incredibly toxic." In some parts of the West, where they are generated by sage, they actually inhibit the growth of other vegetation...
Working with nests of quail eggs, Cambridge University Research Psychologist Margaret Vince used sensitive instruments to record the movements and sounds of quail embryos during the last three days of their incubation period. Some twelve to 18 hours before hatching, she discovered, the eggs began to emit faint and intermittent clicks in time with the breathing of the embryo. The clicking gradually became louder and more regular, drowning out the sound of breathing, until it suddenly stopped only minutes before the eggs hatched...
Silver atoms that are caught in the penetrating beam capture neutrons and briefly become unstable isotopes, emitting gamma rays that can be recorded by the snooper's scintillation counter. Since silver isotopes, like radioactive atoms of other elements, have their own characteristic half life-or rate of decay-and emit gamma rays at a specific energy level, the snooper's detectors can distinguish them from atoms of other elements in the area that have also been made radioactive by the neutron beam...
...present conditions in the universe. Some concluded that stars were rapidly receding from the earth and that light was shifted into an invisible part of the spectrum. Others argued that stars have only a limited life-time and that, at a given moment, only a small number will emit visible light...
Primeval Reversal. On the other hand, such celestial bodies as quasars appear to emit enormous quantities of energy that probably could not be produced by nuclear reactions alone. In some cases, Alfvén says, "total annihilation of matter and antimatter may be the only possible energy source." The sudden release of great amounts of energy from a supernova, for example, has never been satisfactorily explained. It might well be caused by the collision of antimatter and matter stars...