Polymerase chain reaction
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Please take this quick survey to tell us about what happens after you publish a paper. Journal of Clinical Immunology. The PCR, like recombinant DNA technology, has had an enormous impact in both basic and diagnostic aspects of molecular biology because it can produce large amounts of a specific DNA fragment from small amounts of a complex template. Recombinant DNA techniques create molecular clones by conferring on a specific sequence the ability to replicate by inserting it into a vector and introducing the vector into a host cell. In addition to its many applications in basic molecular biological research, PCR promises to play a critical role in the identification of medically important sequences as well as an important diagnostic one in their detection. Unable to display preview. Download preview PDF.
Chain reaction , in chemistry and physics , process yielding products that initiate further processes of the same kind, a self-sustaining sequence. The best-known examples in physics are nuclear fissions brought about by neutrons. Chain reactions are in general very rapid but are also highly sensitive to reaction conditions, probably because the substances that sustain the reaction are easily affected by substances other than the reactants themselves. A chemical chain reaction proceeds by a sequence generally subdivided into three stages: 1 Initiation , in which a reactive intermediate, which may be an atom , an ion, or a neutral molecular fragment, is formed, usually through the action of an agent such as light, heat, or a catalyst. So-called branching chain reactions are a form of chain reaction in which the number of chain carriers increases in each propagation. This condition sometimes is referred to as a chemical explosion.
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Nuclear Chain Reactions are a simple, yet powerful method which to produce both constructive and destructive forces. Only understood to a significant degree within the last century, nuclear chain reactions have many practical uses in the modern era. Chain reactions can be addressed into two categories: first, controlled like a nuclear power plant and uncontrolled an atomic bomb. Both are motivated by fission reactions, which are elaborated in this section. Nuclear chain reactions are one of the modern applications of the fission process. Capitalizing upon the large amounts of energy, nuclear chain reactions can be used for constructive and destructive means. To understand how a chain reaction operates, it is best to search in depth of the nature of fission reactions.
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A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events., Post a Comment. For this puzzle, there are seven golden "links" that link together six two-word phrases when reading down.