Results 201 to 210 of about 4,647 (247)
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On a mechanism for autocatalysis
Chemical Engineering Science, 1972Abstract The mechanism proposed by Walles and Platt for an autocatalytic reaction A → B + C is analysed by the method of singular perturbations. This has some features of interest in that the stable root of the degenerate problem changes during the course of the reaction and an intermediate solution with a different dependence on the small ...
D.R. Schneider, N.R. Amundson, R. Aris
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Autocatalysis in a biological system
Journal of Theoretical Biology, 1971Abstract A biochemical scheme is analyzed in which the synthesis of a precursor is catalyzed by its product. The scheme shows hysteresis in the steady state concentrations of the intermediates only if the outflow from the system is by reaction with a reversible enzyme. The construction of open systems to correspond to an in vivo environment and the
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Autocatalysis, information and coding
Biosystems, 2001Autocatalytic self-construction in macromolecular systems requires the existence of a reflexive relationship between structural components and the functional operations they perform to synthesise themselves. The possibility of reflexivity depends on formal, semiotic features of the catalytic structure-function relationship, that is, the embedding of ...
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Water and Autocatalysis in Living Matter
Electromagnetic Biology and Medicine, 2009Water plays a fundamental role in living organisms. Liquid water includes coherence domains (CD) where all molecules oscillate in unison in tune with a self-trapped electromagnetic field at a well-defined frequency. The coherent oscillations produce an ensemble of quasi-free electrons, able to collect noise energy from the environment and transform it ...
Emilio, Del Giudice, Alberto, Tedeschi
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Specific Autocatalysis in Diastereoisomeric Replicators
Organic Letters, 2005Two diastereoisomeric cycloadducts are capable of accelerating their own formation through the assembly of catalytic ternary complexes. The two cycloadducts do not have any measurable catalytic effect on the rate of formation of their diastereoisomer. [structure: see text]
Eleftherios, Kassianidis +2 more
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To the Core of Autocatalysis in Cyclohexane Autoxidation
Chemistry – A European Journal, 2006AbstractDespite their industrial importance, the detailed reaction mechanism of autoxidation reactions is still insufficiently known. In this work, complementary experimental and theoretical techniques are employed to address the radical‐chain initiation in the autoxidation of cyclohexane with a particular focus on the “lighting‐off” of the oxidation ...
Ive, Hermans +2 more
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Correct classification and identification of autocatalysis
Physical Chemistry Chemical Physics, 2021Systematic analysis of mass-action-type models producing sigmoidal concentration–time profiles led to refining the definition of autocatalysis resulting in their correct characterization and classification.
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Kinetics of autocatalysis in small systems
The Journal of Chemical Physics, 2008Autocatalysis is a ubiquitous chemical process that drives a plethora of biological phenomena, including the self-propagation of prions etiological to the Creutzfeldt-Jakob disease and bovine spongiform encephalopathy. To explain the dynamics of these systems, we have solved the chemical master equation for the irreversible autocatalytic reaction A+B ...
Erdem, Arslan, Ian J, Laurenzi
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Novel applications of physical autocatalysis
Origins of Life and Evolution of Biospheres, 2015The autocatalytic self-reproduction of micelles and vesicles has been studied for several decades. These systems are vital components of certain protocell models and some models for how life may have begun from mixtures of simple chemicals. Here we discuss our recently described autocatalytic systems where self-reproducing micelles are driven by bond ...
Andrew J, Bissette, Stephen P, Fletcher
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Complex Autocatalysis in Simple Chemistries
Artificial Life, 2016Life on Earth must originally have arisen from abiotic chemistry. Since the details of this chemistry are unknown, we wish to understand, in general, which types of chemistry can lead to complex, lifelike behavior. Here we show that even very simple chemistries in the thermodynamically reversible regime can self-organize to form complex autocatalytic ...
Nathaniel Virgo +2 more
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