Ueber die Zeitdauer der Reaction zwischen Jodsäure und schwefliger Säure

Landolt, H.

doi:10.1002/cber.188601901293

Cited by 101 publications

(70 citation statements)

References 2 publications

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“…The feature of this complex at that time was its darkblue color that was observed in 1886 by the Swiss chemist, Hans Heinrich Landolt [43], in reactions called "iodine clock reaction" or "Landolt reaction". Earlier, FrançoisVincent Raspail, the French scientist, valorized this color to test for starch in plants, as indicated in his reports of 1825 [44].…”

Section: Iodine-starch Complexesmentioning

confidence: 92%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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A unique feature of molecular iodine by far, is its ability to bind to polymeric materials. A plethora of natural and synthetic polymers develop complexes when treated with molecular iodine, or with a mixture of mole cular iodine and potassium iodide. Many unexpected findings have been encountered upon complexation of iodine and the polymer skeleton, including the color formation, the polymer morphology changes, the compl exation sites or regions, the biological activity, and the electrical conductivity enhancement of the complexes, with poly iodides (I n¯) , mainly I 3¯ and I 5¯, as the actual binding species. Natural polymers that afford such complexes with iodine species are starch (amylose and amylopectin), chitosan, glycogen, silk, wool, albumin, cellulose, xylan, and natural rubber; iodinestarch being the oldest iodinenatural polymer complex. By contrast, numerous synthetic polymers are prone to make com plexes, including poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), nylons, poly(Schiff base)s, poly aniline, unsaturated polyhydrocarbons (carbon nano tubes, fullerenes C 60 /C 70 , polyacetylene; iodinePVA being the oldest iodinesynthetic polymer complex.

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Section: Iodine-starch Complexesmentioning

confidence: 92%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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“…Finally, notice that for k u = 0 and ␤ = 0 we recover Lotka's 1910 model 38 if we select m = 1 and n = 1 and the autocatalator [39][40][41][42][43][44][45][46] if m = 1 and n = 2. The parameters r, which characterizes the external input in the chemical pool approximation, and K, which characterizes the enzymatic sink, are the relevant parameters in our analysis.…”

Section: General Modelmentioning

confidence: 99%

Chemical oscillations and Turing patterns in a generalized two-variable model of chemical self-replication

Beutel

Peacock‐López

2006

The Journal of Chemical Physics

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Chemical self-replication of oligonucleotides and helical peptides show the so-called square root rate law. Based on this rate we extend our previous work on ideal replicators to include the square root rate and other possible nonlinearities, which we couple with an enzimatic sink. Although the nonlinearity is necessary for complex dynamics, the nature of the sink is the essential feature in the mechanism that allows temporal and spatial patterns. We obtain exact general relations for the Poincare-Adronov-Hopf and Turing bifurcations, and our generalized results include the Higgins, autocatalator, and templator models as specific cases.

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“…5 Random fluctuations may therefore result in a formation of even an overwhelming excess of one of the enantiomers. See DOI: 10.1039/b000000x/ in the beginning stage or in the later phase of a reaction displaying nonlinear feature, however, still remains to be answered. Fluctuations may also be artificially introduced in a reacting system, because perfect mixing can never be reached in practice.…”

Section: Introductionmentioning

confidence: 99%

Initial inhomogeneity-induced crazy-clock behavior in the iodate–arsenous acid reaction in a buffered medium under stirred batch conditions

Valkai

Csekõ

Horváth

2015

Phys. Chem. Chem. Phys.

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It is unambiguously demonstrated that in the case of an autocatalytic reaction, initial inhomogeneities induced by the imperfectly mixed part of the overall volume may result in a serious irreproducibility of the individual kinetic runs. A statistically meaningful number of repetitions, however, gives rise to a reproducible cumulative probability distribution curve often referred to as a support of the stochastic feature. The iodate-arsenous acid reaction being autocatalytic with respect to both iodide and hydrogen ions displays clock behavior. However, the time lag necessary for the appearance of iodine, even in buffered solution, varies in an apparently random manner. Careful analysis of the variation of the different parameters like stirring rate, overall volume, geometry of the reactor and the way of mixing the reactants led us to conclude that the fate of the individual samples is determined at the initial stage when the reacting system is per se inhomogeneous. The place, the size of the so-called ignition volume, where the reacting system is imperfectly stirred, as well as the residence time spent there by the imperfectly mixed reactants all seem to depend on external factors.

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Ueber die Zeitdauer der Reaction zwischen Jodsäure und schwefliger Säure

Cited by 101 publications

References 2 publications

Molecular iodine/polymer complexes

Molecular iodine/polymer complexes

Chemical oscillations and Turing patterns in a generalized two-variable model of chemical self-replication

Initial inhomogeneity-induced crazy-clock behavior in the iodate–arsenous acid reaction in a buffered medium under stirred batch conditions

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