Fused hydrogenated

Nuclear fusion reactors do not split uranium atoms. They fuse hydrogen atoms in a process similar to that which occurs in the Sun and other stars. Although fusion physics is a common occurrence in stars, controlled fusion experiments continue. In 1994, theTokamak facility at Princeton reached a fusion plasma temperature of 510 million degrees and had a power output of 10.7 megawatts. 

Temperatures in the range of 20 to 100 million degrees Celsius are required for fusion reactions. For this reason, a hydrogen bomb is triggered by a conventional fission atomic bomb. The atomic bomb produces the tremendous heat necessary to fuse hydrogen nuclei therefore, fusion bombs are often referred to as thermonuclear. The United States exploded the first hydrogen bomb on Eniwetok Atoll in the Pacific Ocean on November 1, 1952. This bomb was based on the fusion of deuterium ... 

The coolest stars with just enough mass to fuse hydrogen are the M-dwarfs (see chapter 3). Two new classes of brown dwarfs have been added to the cool end of the stellar spectrum. The L-dwarfs (1,300 to 2,000 Kelvin) are slightly cooler and less massive than M-dwarfs. T-dwarfs are cooler and lighter than the L-dwarfs. Both of these new dwarfs cannot sustain hydrogen fusion. Researchers have recently discovered hundreds of T-dwarfs and tens of L-dwarfs. Even the cool T-dwarfs may have magnetic fields that create occasional stellar flares. [For more information, see Linda Rowan, Cooler dwarf stars, Science 289(5480) 697 (August 4, 2000).]... 

Are there processes in namre that destroy deuterium For certain, any deuterium that was part of a cloud that condensed to form a star would be depleted. Stars fuse hydrogen. There are other processes, though rare, that work to take deuterium out of circulation. Their effect would lead to slight reductions in the observed amount of deuterium. So how does the predicted abundance of deuterium compare with its actual abundance when the universe came out of the period of nuclear synthesis 1,000 seconds after the big bang itself ... 

Main Sequence The region on a Hertzsprung-Russell diagram occupied by stars that are fusing hydrogen into helium in their cores. 

With our early 2F -century technology, hydrogen fusion requires temperatures around 10 K, but lower temperatures can be used if the hydrogen is compressed. In the late 24 century, the starship Leinad uses such methods to fuse hydrogen at 10 K. 

Cytochalasins are produced by fungi and show various effects on eukaryotic cells. They bound to actin and induced actin depolymerization [135]. Their structural skeletons are each composed of a macrocyclic ring with a fused hydrogenated isoindole. Several compounds having 12- or 14- or 15-membered ring macrocyclic lactones are numbered among the cytochalasins. 

Red Giant Star Red giants are stars of 0.4 to 10 times the mass of the Sun which have exhausted the supply of hydrogen in their cores and switched to fusing hydrogen in a shell outside the core. The Sun is expected to become a red giant in about five billion years. 

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