Periodic pulses of calcium ions in a chemical system.
By coupling the bromate-sulfite-ferrocyanide oscillating chemical reaction with the complexation of calcium ion by EDTA, we construct a system that generates periodic pulses of free Ca(2+) with an amplitude of 2 orders of magnitude and a period of ca. 20 min. These pulses may be observed either with a calcium ion-selective electrode or with Arsenazo(III) as an indicator. We describe the systematic design procedure and the properties of this first abiotic calcium-based chemical oscillator.
Kurin-Csörgei
Krisztina
K
Department of Inorganic and Analytical Chemistry, L. Eötvös University, H-1518 Budapest 112, P.O. Box 32, Hungary.
Epstein
Irving R
IR
Orban
Miklós
M
D000818:Animals; D001959:Bromates; D002118:Calcium / Q000737:chemistry* / Q000378:metabolism; D020013:Calcium Signaling; D019411:Clinical Laboratory Techniques / Q000295:instrumentation; D005295:Ferrocyanides; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D013447:Sulfites
D001959:Bromates; D005295:Ferrocyanides; D013447:Sulfites; C020354:hexacyanoferrate II; D002118:Calcium