Results 51 to 60 of about 11,144 (287)

Ecological Clues to the Nature of Consciousness

Entropy, 2020
Some dynamics associated with consciousness are shared by other complex macroscopic living systems. For example, autocatalysis, an active agency in ecosystems, imparts to them a centripetality, the ability to attract resources that identifies the system ...
Robert E. Ulanowicz
doaj   +1 more source

Biscale Chaos in Propagating Fronts

, 1996
The propagating chemical fronts found in cubic autocatalytic reaction-diffusion processes are studied. Simulations of the reaction-diffusion equation near to and far from the onset of the front instability are performed and the structure and dynamics of ...
A. Arneodo, A. Hagberg, A. L. Barabási, Agustí Careta, Anatoly Malevanets, D. Horváth, D. Horváth, G. I. Sivashinsky, G. I. Sivashinsky, I. Procaccia, J. Billingham, K. Sneppen, M. Kardar, R. A. Milton, Raymond Kapral, S. K. Scott, S. Zaleski, T. Bohr, V. Yakhot, Y. Kuramoto, Y. Kuramoto, Z. Zhang   +21 more
core   +1 more source

Robust Adaptation and Homeostasis by Autocatalysis [PDF]

The Journal of Physical Chemistry B, 2012
Robust homeostatic mechanisms are essential for the protection and adaptation of organisms in a changing and challenging environment. Integral feedback is a control-engineering concept that leads to robust, i.e., perturbation-independent, adaptation and homeostatic behavior in the controlled variable. Addressing two-component negative feedback loops of
T, Drengstig, X Y, Ni, K, Thorsen, I W, Jolma, P, Ruoff   +4 more
openaire   +2 more sources

Ascorbic acid and copper in linoleate oxidation. II. Ascorbic acid and copper as oxidation catalysts

Journal of Lipid Research, 1969
Both ascorbic acid and copper were strong prooxidants in the oxidation of linoleate in a buffered (pH 7.0) aqueous dispersion at 37°C. Minimum concentrations at which catalytic activity was detected were 1.3 × 10-7m for copper and 1.8 × 10-6m for ...
Gottfried Haase, W.L. Dunkley
doaj   +1 more source

Diffusion Enhances Chirality Selection

, 2006
Diffusion effect on chirality selection in a two-dimensional reaction-diffusion model is studied by the Monte Carlo simulation. The model consists of achiral reactants A which turn into either of the chiral products, R or S, in a solvent of chemically ...
D. Kondepudi, D. Stauffer, Hiroyuki Hyuga, M. Le Bellac, R. B. Stinchcombe, Ryo Shibata, W. A. Bonner, Yukio Saito   +7 more
core   +1 more source

Negative differential response in chemical reactions [PDF]

, 2018
Reaction currents in chemical networks usually increase when increasing their driving affinities. But far from equilibrium the opposite can also happen. We find that such negative differential response (NDR) occurs in reaction schemes of major biological
Cossetto, Tommaso, Esposito, Massimiliano, Falasco, Gianmaria, Penocchio, Emanuele   +3 more
core   +2 more sources

Autocatalysis and All That

HETEROCYCLES, 2010
Alan W. Schwartz
openalex   +2 more sources

Stochastic Approach to Enantiomeric Excess Amplification and Chiral Symmetry Breaking

, 2006
Stochastic aspects of chemical reaction models related to the Soai reactions as well as to the homochirality in life are studied analytically and numerically by the use of the master equation and random walk model. For systems with a recycling process, a
Blackmond D. G., Buhse T., Calvin M., Frank F. C., Goldanskii V. I., Gridnev I. D., Gridnev I. D., Islas J. R., Japp F. R., Lente G., Lente G., Mills M. H., Pasteur L., Pearson K., Press W. H., Saito Y., Saito Y., Saito Y., Saito Y., Saito Y., Sato I., Sato I., Shibata R., Singleton D. A., Singleton D. A., Soai K., Soai K., Soai K., Stryer L., Vollhardt K. P. C.   +29 more
core   +1 more source

Linear control analysis of the autocatalytic glycolysis system [PDF]

, 2009
Autocatalysis is necessary and ubiquitous in both engineered and biological systems but can aggravate control performance and cause instability. We analyze the properties of autocatalysis in the universal and well studied glycolytic pathway. A simple
Buzi, Gentian, Chandra, Fiona A., Doyle, John C.   +2 more
core   +1 more source

Rapid screening of staphylokinase protein variants using an unpurified cell‐free expression system

FEBS Open Bio, EarlyView.
An unpurified cell‐free protein synthesis (CFPS) platform enables rapid functional screening of staphylokinase variants. Direct plasminogen‐activation assays performed in microplate format provide real‐time activity readouts, allowing rapid identification and ranking of variants with improved or reduced fibrinolytic activity without protein ...
Maria Tomková, Veronika Hovanová, Jiri Damborsky, Erik Sedlák   +3 more
wiley   +1 more source