Tags : DC magnetic field; the BZ reaction; chemical wave; heterogeneous magnetic field  

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Reference : Blank M, Soo L. 2001. Electromagnetic acceleration of electron transfer reactions. J Cell Biochem    more

Reference : Blank M, Soo L. 2001. Electromagnetic acceleration of electron transfer reactions. J Cell Biochem 81:278–283. Blank M, Soo L. 2003. Electromagnetic acceleration of the Belousov-Zhabotinski reaction. Bioelectrochemistry 61: 93–97. Boga E, Ka´da´r S, Peintler G, Nagypa´l I. 1990. Effect of magnetic fields on a propagating reaction front. Nature 347:749–751. Epstein IR, Vanag VK. 2005. Complex patterns in reactive microemulsions: Self-organized nanostructures? Chaos 15: 047510-1-7. Evans R, Timmel CR, Hore PJ, Britton MM. 2006. Magnetic resonance imaging of the manipulation of a chemical wave using an inhomogeneous magnetic field. J Am Chem Soc 128:7309–7314. He X, Kustin K, Nagypa´l I, Peintler G. 1994. A family of magnetic field dependent chemical waves. Inorg Chem 33:2077–2078. Lide DR. 2007. Magnetic susceptibility of the elements and inorganic compounds. In: Lide RD, editor. CRC handbook of chemistry and physics (88th edition, 2007–2008). Boca Raton: CRC Press. pp. 4-142–4-147. Prigogine I, Lefever R, Goldbeter A, Herschkowitz-Kaufman M. 1969. Symmetry breaking instabilities in biological systems. Nature 223:913–916. Schenck JF. 2005. Physical interactions of static magnetic fields with living tissues. Prog Biophys Mol Biol 87:185–204. Scott SK, Showalter K. 1995. Simple and complex propagating reaction-diffusion fronts. In: Kapral R, Showalter K, editors. Chemical waves and patterns. Dordrecht: Kluwer Academic Publishers. pp. 485–516. Sontag W. 2006. Low frequency electromagnetic fields and the Belousov–Zhabotinsky reaction. Bioelectromagnetics 27: 314–319. Zaikin AN, Zhabotinsky AM. 1970. Concentration wave propagation in two-dimensional liquid-phase self-oscillating system. Nature 225:535–537. Zhadin MN. 2001. Review of Russian literature on biological action of DC and low-frequency AC magnetic fields. Bioelectromagnetics 22:27–45.    less

Abstract : It is believed that static magnetic fields (SMF) cannot affect the pattern formation of the Belouso    more

Abstract : It is believed that static magnetic fields (SMF) cannot affect the pattern formation of the Belousov-Zhabotinsky (BZ) reaction, which has been frequently studied as a simplified experimental model of a nonequilibrium open system, because SMF produces no induced current and the magnetic force of SMF far below 1 T is too low to expect the effects on electrons in the BZ reaction. In the present study, we examined whether the velocity of chemical waves in the unstirred BZ reaction can be affected by a moderate-intensity SMF exposure depending on the spatial magnetic gradient. The SMF was generated by a parallel pair of attracting rectangular NdFeB magnets positioned opposite each other. The respective maximum values of magnetic flux density (B(max)), magnetic flux gradient (G(max)), and the magnetic force product of the magnetic flux density its gradient (a magnetic force parameter) were 206 mT, 37 mT/mm, and 3,000 mT(2)/mm. The ferroin-catalyzed BZ medium was exposed to the SMF for up to 16 min at 25 degrees C. The experiments demonstrated that the wave velocity was significantly accelerated primarily by the magnetic gradient. The propagation of the fastest wave front indicated a sigmoid increase along the peak magnetic gradient line, but not along the peak magnetic force product line. The underlying mechanisms of the SMF effects on the anomalous wave propagation could be attributed primarily to the increased concentration gradient of the paramagnetic iron ion complexes at the chemical wave fronts induced by the magnetic gradient.- Slides    less