autocatalysis


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autocatalysis

[¦ōd·ō·kə′tal·ə·səs]
(chemistry)
A catalytic reaction started by the products of a reaction that was itself catalytic.
References in periodicals archive ?
Thermodynamic and kinetic control of reactions, organic chemistry, systems chemistry, autocatalysis, emergent phenomenon of autopoiesis, and contingency will ultimately define this transition from the historical perspective.
To exemplify this, he develops a simple and empirically testable molecular model involving two morphodynamic processes, which are ubiquitously present in all organisms, namely the self-assembly of cellular membranes and the autocatalysis of organic compounds so essential to life and its ability to reproduce itself.
D) Schematic illustration of an autocatalysis motif in which R is autocatalyzed to R*.
Autocatalysis PDLA Faster degradation in 35, 36 center compare to surface PDLA + Accelerate degradation 37 Caffeine 75/25 PLGA + Decrease in degradation 43 Ganciclovir rate due to basic drug Presence PLGA + Type of drug doesn't 44 of drug Lidocaine significantly affect PLGA + polymer degradation Ibuprofene kinetics.
In At Home in the Universe, Stuart Kauffman introduces the theory of autocatalysis while using it to debunk the concepts of random mutation and natural selection, which "could not possibly explore .
Performance and 1,2,4,6,9,10,11,13, activity of a control of metabolism, 16,17,19,20,21,22,23, biosystem including autocatalysis 25,29,37,38,39,41,47, (6,11,17,20,37,38,39,41, 50,60,61 60), cyclic chemical processes (6,19,20,22), feedback loops (37,47), and active transport (13,62) 4.
This prepares us for Chapter 8 which presents the centerpiece of the book, autocatalysis.
The resultant accumulation of chlorine molecules, exert an initiating action on the decomposition of 2-chloropropene [9,10] and thus autocatalysis occurs owing to the accumulation of chlorine molecules as depicted in reactions (d) and (e).
His emergent approach builds on and extends Maturana and Varela's (1980) notion of autopoiesis and Stuart Kauffman's (1993, 2000) idea of autocatalysis.
A catalyst is a substance that accelerates a chemical reaction without undergoing any permanent change itself; in autocatalysis the catalyst is one of the products of the reaction, this constituting a feedback loop in the chemical process.
The difference between the surface and the bulk of the polymer matrices during degradation is thought to be due to the autocatalysis of the degradation reaction in the bulk of the polymers [12].
They distinguished 47 distinctive properties of living beings, among them self-reproduction (27 mentions by different authors), capability of (negentropy) evolution (26), ability to extract free energy and matter from the environment (16), ability to perform and control metabolism (15), ability to store and replicate genetic information (12), ability to grow (10), capable of thermodynamic and chemical disequilibrium (9), ability to have autocatalysis (9), existence of genome and genetic code (7), availability of membranes as geochemical barriers (7), at the highest level of complexity (7), foresight and ability to modify own behavior (7), composed of carbon-based polymers (6), etc.