Concentration Wave Propagation in Two-dimensional Liquid-phase Self-oscillating System

Заикин, А. Н.; Zhabotinsky, Anatol M.

doi:10.1038/225535b0

Cited by 1,799 publications

(981 citation statements)

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“…Since we are interested in observing spatial pattern formation as well as temporal oscillation in calcium oscillators, we sought an indicator that makes the oscillations in [Ca 2+ ] visible. Examples of such pattern formation include traveling spiral waves 7 and stationary Turing structures 8 in the BelousovZhabotinsky (BZ) and chlorite-iodide-malonic acid (CIMA) chemical systems, respectively, and Ca 2+ spiral waves observed in developing frog oocytes. 9 Periodic changes in color may occur in a chemical oscillator as a result of formation of a colored intermediate (e.g., in many uncatalyzed bromate oscillators 10 ), generation of a colored complex acting as a catalyst (e.g., ferroin in the BZ oscillator 11 ), or the use of indicators for an oscillating species (e.g., starch for iodine in the CIMA reaction 8 ).…”

Section: Resultsmentioning

confidence: 99%

Periodic Pulses of Calcium Ions in a Chemical System

2006

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By coupling the bromate-sulfite-ferrocyanide oscillating chemical reaction with the complexation of calcium ion by EDTA, we construct a system that generates periodic pulses of free Ca 2+ with an amplitude of 2 orders of magnitude and a period of ca. 20 min. These pulses may be observed either with a calcium ionselective electrode or with Arsenazo(III) as an indicator. We describe the systematic design procedure and the properties of this first abiotic calcium-based chemical oscillator.

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Section: Resultsmentioning

confidence: 99%

Periodic Pulses of Calcium Ions in a Chemical System

2006

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“…Finally, when the same reaction occurs in a thin layer of unstirred solution, a propagation of wavefronts initiated from different centres is observed (Zaikin & Zhabotinski, 1970). At every point in space the system undergoes relaxation oscillations involving a short oxydation phase and a longer reduction phase.…”

Section: I38 I Prigogine and G Nicolis V Further Examples And Expementioning

confidence: 96%

Biological order, structure and instabilities

Prigogine¹,

Nicolis

1971

Quart. Rev. Biophys.

363

168

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“…It represents the catalytic oxidation of an organic substrate with active methylenic hydrogens, generally malonic acid (CH 2 (COOH) 2 , MA), by bromate ions in a strongly acidic aqueous solution. 1,2 The general stoichiometry has the form: 2BrO 3 -+ 3MA + 2H + 98 catalyst 2BrMA + 4H 2 O + 3CO 2 (1.1) where BrMA is bromomalonic acid (BrCH(COOH) 2 ). The most used catalysts are metal redox couples such as Ce(IV)/Ce(III) or ferriin/ferroin (Fe(phen) 3 3+ /Fe(phen) 3 2+ ).…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Perturbation of the Dynamics of the Ferroin Catalyzed Belousov−Zhabotinsky Reaction in a Batch Reactor Caused by Sodium Dodecyl Sulfate Micelles

et al. 2008

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The effects of the anionic surfactant sodium dodecyl sulfate (SDS) on the spatio-temporal and temporal dynamics of the ferroin-catalyzed Belousov-Zhabotinsky (BZ) reaction have been studied over a wide surfactant concentration range. For the first time, investigations were performed also for unstirred systems. The presence of SDS in the reaction mixture influences the oscillatory parameters to an extent that significantly depends on the surfactant concentration. The trend of the wave speed V upon the increasing amount of SDS was found to have a maximum at [SDS] ) 0.075 mol dm -3 (V ) 0.071 mm s -1 ), after which the speed decreased to 0.043 mm s -1 at [SDS] ) 0.5 mol dm -3 , which is below the value found in the absence of the surfactant (V ) 0.055 mm s -1 ). The response of the oscillatory BZ system to the addition of SDS has been ascribed to two different causes: (a) the peculiar capability of the organized surfactant assemblies to affect the reactivity by selectively sequestering some key reacting species and (b) the modifications induced by SDS on the physical properties of the medium. These hypotheses have been corroborated by performing spectrophotometric investigations on the stirred BZ system. Complementary viscosity measurements gave useful hints for the clarification of the surfactant role.

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Concentration Wave Propagation in Two-dimensional Liquid-phase Self-oscillating System

Cited by 1,799 publications

References 4 publications

Periodic Pulses of Calcium Ions in a Chemical System

Periodic Pulses of Calcium Ions in a Chemical System

Biological order, structure and instabilities

Spatio-Temporal Perturbation of the Dynamics of the Ferroin Catalyzed Belousov−Zhabotinsky Reaction in a Batch Reactor Caused by Sodium Dodecyl Sulfate Micelles

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