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.
Animasaun, "Bioconvection in MHD nanofluid flow with nonlinear thermal radiation and quartic autocatalysis chemical reaction past an upper surface of a paraboloid of revolution," International Journal of Thermal Sciences, vol.
Meanwhile, the rate of acid catalysis and autocatalysis (Scheme 1; see (3)) was accelerated due to the fact that the acidity of [alpha]-chloropropanoic acid was stronger than that of propanoic acid.
"Computations and cybernetic processes are insentient because approach builds on and extends Maturana and Varela's (1980) notion of autopoiesis and Stuart Kauffman's (1993, 1995) idea of autocatalysis."
Model-based studies indicate that positive feedback loop motifs with mutually activating genes, protein covalent modification cycles with autocatalysis, and enzymatic cascades produce transcritical bifurcations (Aguda 1999; Alam-Nazki and Krishnan 2012; Widder et al.
An accumulation of hydrophilic acidic end groups has a twofold effect: (1) it increases the amount of water incursion into the polymer and (2) initiates autocatalysis of the polymer matrix [47].
If this equilibrium is disturbed, the degradation mechanism could provoke internal autocatalysis, via the carboxyl and hydroxyl end group by-products.
Such specificity was already observed during the model design, for instance, when we tested different degrees of autocatalysis that ended up as quadratic in the proposed model.
Initiator caspases (Caspase-2,-8,-9, and-10) are present in complexes with other regulatory proteins and are activated by facilitated autocatalysis in response to apoptotic signals.
Stability and pattern formation in a coupled arbitrary order of autocatalysis system.
Another important aspect of the theory of autopoiesis is that of the system's autocatalysis; the living system, because of its autopoietic procedure, destroys its very own components and creates new ones; at any given moment, the only thing that is really important is the ability of the components to participate supportively in the autopoietic cycle, despite other characteristics they may hold (which of course could signify their own autonomy).
Among them are the copolymer composition [33], morphology [34], autocatalysis by acidic degradation products inside a matrix [35, 36], presence of drugs [37] or other excipients [38] and preparation technique [39].