Article Dans Une Revue Science Année : 2009

An Experimental Design Method Leading to Chemical Turing Patterns

Résumé

Chemical reaction-diffusion patterns often serve as prototypes for pattern formation in living systems, but only two isothermal single-phase reaction systems have produced sustained stationary reaction-diffusion patterns so far. We designed an experimental method to search for additional systems on the basis of three steps: (i) generate spatial bistability by operating autoactivated reactions in open spatial reactors; (ii) use an independent negative-feedback species to produce spatiotemporal oscillations; and (iii) induce a space-scale separation of the activatory and inhibitory processes with a low-mobility complexing agent. We successfully applied this method to a hydrogen-ion autoactivated reaction, the thiourea-iodate-sulfite (TuIS) reaction, and noticeably produced stationary hexagonal arrays of spots and parallel stripes of pH patterns attributed to a Turing bifurcation. This method could be extended to biochemical reactions.

Mots clés

Fichier non déposé

Dates et versions

hal-00580395 , version 1 (28-03-2011)

Identifiants

Citer

Judit Horváth, Istvan Szalai, Patrick de Kepper. An Experimental Design Method Leading to Chemical Turing Patterns. Science, 2009, 324 (5928), pp.772-775. ⟨10.1126/science.1169973⟩. ⟨hal-00580395⟩

Collections

103 Consultations
0 Téléchargements

Altmetric

Partager

  • More