chain reaction

listen to the pronunciation of chain reaction
İngilizce - İngilizce
A series of events, each one causing the next

The bombs all exploded in a chain reaction.

A nuclear reaction in which particles produced by the fission of one atom trigger fissions of other atoms

The Manhattan Project produced the first recorded controlled chain reaction.

a self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others
A self-sustaining reaction in which one reaction event stimulates one or more additional reaction events to keep the process going
A chain reaction is a series of events, each of which causes the next. The powder immediately ignited and set off a chain reaction of explosions. Process yielding products that initiate further processes of the same kind. Nuclear chain reactions are a series of nuclear fissions initiated by neutrons produced in a preceding fission. A critical mass, large enough to allow more than one fission-produced neutron to be captured, is necessary for the chain reaction to be self-sustaining. Uncontrolled chain reactions, as in an atomic bomb, occur when large numbers of neutrons are present and the reactions multiply very quickly. Nuclear reactors control their reactions through the careful distribution of the fissionable material and insertion of neutron-absorbing materials
a series of chemical reactions in which the product of one is a reactant in the next
A reaction which, once started, will produce a material or substance necessary to continue the reaction An example is nuclear fission Once a fission reaction is started, neutrons are released, which cause more nuclei to undergo fission, which release more neutrons, and so on
(also Nuclear chain reaction) 1 A reaction that stimulates its own repetition 2 For example, nuclear reaction occurs when neutrons released from a split atom such as a uranium-235 (U235) nucleus go on to fission other nuclei This reaction produces additional neutrons that cause more fissions, which release still more neutrons to cause even more fissions, which release even more neutrons, and so on See Fission
A reaction in which the material or energy that starts the reaction is also one of the products and can cause similar reactions
A self-sustaining reaction in which one reaction event stimulates one or more addi­tional reaction events to keep the process going
(nuclear) a self-sustaining fission process caused by the production of neutrons that proceed to split other nuclei (21 6)
a self-sustaining reaction in which the products of one reaction event stimulate further reaction events
A chain of events described by W Edwards Deming: improve quality, decrease costs, improve productivity, increase market with better quality and lower price, stay in business, provide jobs and provide more jobs
A process in which some of the neutrons released in one fission event cause other fission events that in turn release neutrons
A reaction in which one of the starting materials is regenerated in the last step of the reaction
The continuing process of nuclear fissioning in which the neutrons released from a fission trigger at least one other nuclear fission In a nuclear weapon, an extremely rapid, multiplying chain reaction causes the explosive release of energy In a reactor, the pace of the chain reaction is controlled to produce heat (in a power reactor) or large quantities of neutrons (in a research or production reactor)
a reaction which, once started, continues through its own action; the splitting of uranium atoms releases neutrons that, in turn, continue the process causing other uranium atoms to split
a series of chemical reactions in which the product of one is a reactant in the next a self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others
A process in which one nuclear transformation sets up conditions for similar nuclear transformation in another atom Thus, when fission occurs in uranium atoms, neutrons are released, which in turn produce fission in other uranium atoms
A chain reaction is a series of chemical changes, each of which causes the next
series of reactions in which each is directly caused by the one before it
The process by which the fission of a nucleus releases neutrons, causing other nuclei to undergo fission in turn Both the atomic bomb and the nuclear reactor use a chain reaction to generate energy
A reaction in which one of the agents necessary to the reaction is itself produced by the reaction, thus causing like reactions
From a 1/4 Tag formation only (at A1) Very Centers and the directly-facing Outside dancers Pass Thru as the End of the Center Line Counter Rotate 1/4 [walk forward in an arc, changing facing direction by 90°, 1/4 of a Circle around the outside of the set]; Centers of each side Hinge; Center 4 Star 1/4 as Outsides Trade; Those who meet Cast Off 3/4 as Others move up (Phantom Hourglass Circulate) A 1/4 Tag formation ends in Parallel Waves
A reaction that initiates its own repetition In a fission reaction, free neutrons are produced which fly off and strike other nuclei, causing them to split and send off yet more free neutrons The fission will continue as long as there are enough free neutrons carrying the right amount of energy
a self-sustaining fission process caused by the production of neutrons that proceed to split other nuclei
repeated fission caused when the neutrons released in fission bombard other atoms
A reaction that stimulates its own repetition, in particular one, where the neutrons originating from nuclear fission cause series of fission reactions
Lengthening of the main chain (backbone) of polymer molecules by end-to-end attachment
A large number of nuclear fissions, taking place within a certain mass of a fissionable isotope, that release a great quantity of energy in a short time
When a fissionable nucleus is split by a neutron it releases energy and one or more neutrons These neutrons split other fissionable nuclei, releasing more energy and more neutrons, making the reaction self-sustaining
A reaction that stimulates its own repetition, in particular where the neutrons originating from nuclear fission cause an ongoing series of fission reactions
chain reactions
plural form of chain reaction
polymerase chain reaction
a technique in molecular biology for creating multiple copies of DNA from a sample; used in genetic fingerprinting etc
polymerase chain reaction
A technique for amplifying DNA sequences in vitro by separating the DNA into two strands and incubating it with oligonucleotide primers and DNA polymerase. It can amplify a specific sequence of DNA by as many as one billion times and is important in biotechnology, forensics, medicine, and genetic research. Laboratory technique used to make numerous copies of specific DNA segments quickly and accurately. These are needed for various experiments and procedures in molecular biology, forensic analysis (DNA fingerprinting), evolutionary biology (to amplify DNA fragments found in ancient specimens), and medicine (to diagnose genetic disease or detect low viral counts). Invented by Kary Mullis, PCR requires a DNA template (as little as one molecule) to copy, nucleotides to build the copies, and the enzyme DNA polymerase to catalyze the formation of bonds between the nucleotide monomers. Each three-step cycle (separating the two strands of the DNA double helix, marking the ends of the segment to be copied, and catalyzing the formation of bonds), which takes only minutes to complete, doubles the number of DNA strands present in the reaction medium. Repetition of this cycle many times results in an exponential increase in the amount of DNA
polymerase chain reaction
laboratory technique used to replicate segments of DNA by repeatedly splitting the DNA strands and duplicating them with a DNA polymerase enzyme, PCR (Molecular Biology)
chain reaction