And the type of nuclear decay each isotope undergoes before it reaches a state.
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"Remicade is considered by many physicians to be a nuclear-bomb-type treatment, " says Walsh at Jefferies.
And the fast-breeder type of nuclear reactor in which plutonium was used as fuel is no longer economic.
Also on Thursday's China Daily is the news that Bill Gates - co-founder of Microsoft - has confirmed that a company he helped found is co-operating on the development of a new type of nuclear reactor in China.
However, since the UK will most likely adopt a single reactor system for all its new nuclear power plants, there will only be one type of waste stream.
Today it has just nine, so a single problem with one type could affect a large fraction of the nuclear arsenal.
They managed to extract the type of DNA found in the nuclei of cells (nuclear DNA) and genetic material from the cell's "powerhouses" - known as mitochondria.
Equally importantly, the Higgs allows two of the four forces in nature -- the electromagnetic force and the weak force, which is responsible for most nuclear reactions -- to be unified and described by mathematics of the same type that describe the other two known forces, the so-called strong force and gravity.
Theory suggests that a certain type of giant, short-lived star can experience catastrophic collapse when the nuclear reactions at its core can no longer support its mass.
Two kinds of nuclear plants are most likely to be affected by the accident those of similar reactor type and those that also are located in coastal areas near earthquake faults.
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