Chemical waves

Convection in chemical waves.

Diffusion Action of Chemical Waves

Diffusion actions of chemical waves are calculated as the product Kκmλu = h, where K is the diffusivity factor, κ is the tortuosity factor, m is the particle mass, λ is the wavelength, u is the propagation speed, h is a characteristic constant of the diffusion action. During evolution of successive LR (Liesegang ring) waves, BZ (Belousov-Zhabotinsky) waves, and cAMP (cyclic adenosine 3 ́,5 ́-mono...

chemical waves and acid - base

Noise sustained waves in subexcitable media: From chemical waves to brain waves.

We discuss a novel type of spatiotemporal pattern that can be observed in subexcitable media when coupled to a thermal environment. These patterns have been recently observed in several different types of systems: a subexcitable photosensitive Belousov-Zhabotinsky reaction, hippocampal slices of rat brains, and astrocyte syncytium. In this paper, we introduce the basic concepts of subexcitable ...

Chemical recognition of gases and gas mixtures with terahertz waves.

A time-domain chemical-recognition system for classifying gases and analyzing gas mixtures is presented. We analyze the free induction decay exhibited by gases excited by far-infrared (terahertz) pulses in the time domain, using digital signal-processing techniques. A simple geometric picture is used for the classif ication of the waveforms measured for unknown gas species. We demonstrate how t...