Chaos and beauty in a beaker: The early history of the Belousov‐Zhabotinsky reaction

Kiprijanov, Konstantin S.

doi:10.1002/andp.201600025

Cited by 19 publications

(13 citation statements)

References 27 publications

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“…Instead of a gradual change from a colorless solution to a pale yellow one, due to the oxidation of Ce 3+ to Ce 4+ , periodic fluctuations in the color of the reaction mixture were observed, indicating that successive interconversions between reduced and oxidized states of reactants were taking place. Belousov was unsuccessful in publishing his results because the reviewers believed that this phenomenon disagreed with the Second Law of Thermodynamics (Kiprijanov, 2016). However, in 1961 Zhabotinsky verified Belousov's discovery, publishing his results in 1964 (Tyson, 1994).…”

Section: Oscillations In Chemical and Biological Systemsmentioning

confidence: 99%

Aparición de oscilaciones autosostenidas en una ruta metabólica hipotética regulada por un bucle de retroalimentación positiva

et al. 2020

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Los comportamientos oscilatorios sostenidos pueden surgir tanto en sistemas químicos como biológicos, aunque con mayor frecuencia en estos últimos. En las vías metabólicas se han observado oscilaciones con períodos del orden de minutos a las que se atribuye importancia funcional. Esta ritmicidad bioquímica puede explicarse mediante la existencia de una enzima alostérica que es considerada el origen de la inestabilidad estructural del sistema, promoviendo su evolución hacia dinámicas no estacionarias como las oscilaciones sostenidas y el caos. Este artículo presenta un modelo cinético simple de una vía metabólica hipotética lineal de cuatro etapas y que consta de un bucle de retroalimentación positiva. El modelo permite la simulación de comportamientos periódicos con el objeto de poder analizar sus factores desencadenantes y mecanismos subyacentes. Las oscilaciones surgen debido a la retroalimentación positiva para un rango estrecho de valores del flujo de entrada. La amplitud de las oscilaciones en las concentraciones de metabolitos depende de la distancia al oscilador, el valor de las constantes cinéticas y el flujo de entrada. El sistema exhibe comportamientos más complejos cuando el flujo de entrada es oscilatorio.

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Section: Oscillations In Chemical and Biological Systemsmentioning

confidence: 99%

Aparición de oscilaciones autosostenidas en una ruta metabólica hipotética regulada por un bucle de retroalimentación positiva

et al. 2020

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“…Prigogine’s starting point was the Belousov–Zhabotinsky reaction, an isothermal chemical oscillation. Here, one of the reactants is also the product, for example, A + B → 2A [ 8 , 9 ]. Our starting point is the Citric Acid Cycle.…”

Section: Introductionmentioning

confidence: 99%

Rethinking the Citric Acid Cycle: Connecting Pyruvate Carboxylase and Citrate Synthase to the Flow of Energy and Material

Roosterman¹,

Cottrell

2021

IJMS

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In 1937, Sir H. A Krebs first published the Citric Acid Cycle, a unidirectional cycle with carboxylic acids. The original concept of the Citric Acid Cycle from Krebs’ 1953 Nobel Prize lecture illustrates the unidirectional degradation of lactic acid to water, carbon dioxide and hydrogen. Here, we add the heart lactate dehydrogenase•proton-linked monocarboxylate transporter 1 complex, connecting the original Citric Acid Cycle to the flow of energy and material. The heart lactate dehydrogenase•proton-linked monocarboxylate transporter 1 complex catalyses the first reaction of the Citric Acid Cycle, the oxidation of lactate to pyruvate, and thus secures the provision of pyruvic acid. In addition, we modify Krebs’ original concept by feeding the cycle with oxaloacetic acid. Our concept enables the integration of anabolic processes and allows adaption of the organism to recover ATP faster.

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“…Reaction diffusion (RD)-based dynamical systems that are intrinsically driven by chemical reactions are one such system that have close correspondence to their biological analogues. , The prime objective of our work is to harness interactions between different length scales, particularly the interactions at nano- and continuum scales, to provide unique properties to these RD-based dynamical systems. Here, we focus on the Belousov–Zhabotinsky (BZ) reaction, − a well-known nonlinear chemical oscillator, and reveal that by the use of non-graphene-based 2D nanomaterials as catalytic mats, these chemical oscillations are significantly enhanced. Traditionally, the BZ reaction is catalyzed by “catalyst-in-solution” transition metal ions of cerium, manganese, iron, ruthenium, etc., which undergo cyclic variation in their oxidation states. − Depending on the type of metal ion catalyst, the periodic color change of the BZ reaction mixture takes place, which corresponds to the oxidation state of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Kinetics of Self-oscillating Chemical Reactions via Catalytic Ceria Nanomats

Sharma

Dayal

2020

J. Phys. Chem. C

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Chemical reactions that exhibit self-sustained oscillations show great promise for designing multifunctional materials for biomimetic applications. Belousov−Zhabotinsky (BZ) reactions are dynamical systems that operate far from equilibrium and thus serve as model systems for such applications. Catalyzed by a metal ion that undergoes rhythmic redox cycles, the solutions of BZ reactions exhibit periodic color change that corresponds to the oxidation state of the catalyst. Here, we demonstrate that by harnessing the interactions between nano-and continuum length scales, the oscillations in BZ reactions are significantly enhanced. In particular, we show that colloidal dispersions of ceria nanosheets (CeNSs) are excellent catalysts for BZ reactions, unlike nanoparticle-decorated graphene-based composites. Further, we identify the key steps of the reaction mechanism and determine the key kinetic parameters via combination of experiments and simulations. Specifically, we elucidate that the Oregonator model can be used to simulate BZ kinetics for CeNSs. We believe that through this maiden study, where bare non-graphene-based metal nanosheets have been used to catalyze oscillatory reactions, we open up new avenues to tune characteristics of dynamical systems for biomimetic applications.

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Chaos and beauty in a beaker: The early history of the Belousov‐Zhabotinsky reaction

Cited by 19 publications

References 27 publications

Aparición de oscilaciones autosostenidas en una ruta metabólica hipotética regulada por un bucle de retroalimentación positiva

Aparición de oscilaciones autosostenidas en una ruta metabólica hipotética regulada por un bucle de retroalimentación positiva

Rethinking the Citric Acid Cycle: Connecting Pyruvate Carboxylase and Citrate Synthase to the Flow of Energy and Material

Enhancing the Kinetics of Self-oscillating Chemical Reactions via Catalytic Ceria Nanomats

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