Results 211 to 220 of about 5,372 (258)

Ester hydrolysis: Conditions for acid autocatalysis and a kinetic switch [PDF]

Tetrahedron, 2017
Autocatalysis can be used to obtain a sharp switch in state after a programmable time lag. Here, autocatalysis driven by acid concentration during the dissolution and hydrolysis of solid esters was investigated.
Annette F. Taylor, Tamás Bánsági
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On a mechanism for autocatalysis

Chemical Engineering Science, 1972
Abstract 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
openaire   +1 more source

Autocatalysis, information and coding

Biosystems, 2001
Autocatalytic 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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Asymmetric Autocatalysis: Facts and Fancy

Journal of Macromolecular Science: Part A - Chemistry, 1989
Apparently no definitive experiments have ever been reported which could be defined as asymmetric autocatalysis. This paper discusses the design of several experiments which might lead to asymmetric autocatalytic reactions.
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Water and Autocatalysis in Living Matter

Electromagnetic Biology and Medicine, 2009
Water 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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Correct classification and identification of autocatalysis

Physical Chemistry Chemical Physics, 2021
Systematic 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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Autocatalysis in a biological system

Journal of Theoretical Biology, 1971
Abstract 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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To the Core of Autocatalysis in Cyclohexane Autoxidation

Chemistry – A European Journal, 2006
AbstractDespite 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, Pierre A, Jacobs, Jozef, Peeters   +2 more
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Novel applications of physical autocatalysis

Origins of Life and Evolution of Biospheres, 2015
The 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, 2016
Life 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, Takashi Ikegami, Simon McGregor   +2 more
openaire   +3 more sources