Reacting chemical mixture in which the concentrations change periodically
A stirred BZ reaction mixture showing changes in color over time
In chemistry, a chemical oscillator is a complex mixture of reacting chemical compounds in which the concentration of one or more components exhibits periodic changes. They are a class of reactions that serve as an example of non-equilibrium thermodynamics with far-from-equilibrium behavior. The reactions are theoretically important in that they show that chemical reactions do not have to be dominated by equilibrium thermodynamic behavior.
In cases where one of the reagents has a visible color, periodic color changes can be observed. Examples of oscillating reactions are the Belousov–Zhabotinsky reaction (BZ reaction), the Briggs–Rauscher reaction, and the Bray–Liebhafsky reaction.
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In chemistry, a chemicaloscillator is a complex mixture of reacting chemical compounds in which the concentration of one or more components exhibits...
triiodide-starch complex. Additional reagents can be added to some chemical clocks to build a chemicaloscillator. For example, the Briggs–Rauscher reaction is derived...
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In electronics a relaxation oscillator is a nonlinear electronic oscillator circuit that produces a nonsinusoidal repetitive output signal, such as a...
observed by UV–visible spectroscopy. Clock reaction Old Nassau reaction Chemicaloscillator Briggs–Rauscher reaction See: Landolt, H. (1886). "Ueber die Zeitdauer...
In spectroscopy, oscillator strength is a dimensionless quantity that expresses the probability of absorption or emission of electromagnetic radiation...
proliferation. The Belousov–Zhabotinsky reaction is a spatio-temporal chemicaloscillator that can be simulated by means of a cellular automaton. In the 1950s...
large set of coupled oscillators. Its formulation was motivated by the behavior of systems of chemical and biological oscillators, and it has found widespread...
Belousov–Zhabotinsky reaction is a non-biological example of this kind of scheme, a chemicaloscillator. Later research has managed to create convincing models of patterns...
the frequency effects that can occur when a harmonic oscillator is disturbed by a second oscillator operating at a nearby frequency. When the coupling is...
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discovered in 1962 by physicist J. B. Gunn. Its main uses are in electronic oscillators to generate microwaves, in applications such as radar speed guns, microwave...
an audio frequency oscillator. An audio oscillator produces frequencies in the audio range, about 16 Hz to 20 kHz. An RF oscillator produces signals in...
A chemical laser is a laser that obtains its energy from a chemical reaction. Chemical lasers can reach continuous wave output with power reaching to megawatt...
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coupled plasma. Advances in design of diode lasers and optical parametric oscillators promote developments in fluorescence and ionization spectrometry and...
are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency...
di- 'two') are molecules composed of only two atoms, of the same or different chemical elements. If a diatomic molecule consists of two atoms of the same element...
is more precise than any previously measured atomic oscillator strength. This lithium oscillator strength is related to the radiative lifetime of atomic...
to convey the signal, has been invented, as have fluid diodes, a fluid oscillator and a variety of hydraulic "circuits," including one that has no electronic...
describing a nonlinear limit cycle oscillator into a one-dimensional phase equation. Many phenomena in our world such as chemical reactions, electric circuits...
radiation, resistance in electronic oscillators, and absorption and scattering of light in optical oscillators. Damping not based on energy loss can...
Maxwell-Boltzmann distribution Chemical relaxation methods, related to temperature jump Relaxation oscillator, a type of electronic oscillator In mathematics: Relaxation...
(because it is a diamide of carbonic acid), is an organic compound with chemical formula CO(NH2)2. This amide has two amino groups (–NH2) joined by a carbonyl...
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