of paper presented at the Eleventh Annual Meeting of the Radiation Research Sot-iety, Marquette University, Milwaukee, Wisconsin, May 26 to 29, 1963. DR .R UP NA TH JI( D R. RU PA K NA TH ) -18UCRL1068 3 Supplement A1 1 . DIFFUSION-GRAVITY-CONTROLLED E N 2 YME -SUBSTRATE REACTION

Intricate patterns of wave propagation are exhibited in a chemical reaction-diffusion system with spatiotemporal feedback. Wave behavior is controlled by feedback-regulated excitability gradients that guide propagation in specified directions. Waves interacting with boundaries and with other waves are observed when interaction terms are incorporated into the control algorithm. Spatiotemporal fe...

We explore the means by which immobilization of a substrate on a surface can increase the rate of a diffusion-controlled enzymatic reaction. A quasichemical approach is developed and compared with Brownian dynamics simulations. We use these methods to show that restricting only the orientation of the enzyme by long-range interactions with the surface is sufficient for enhancing catalysis.

Aktrrct-Aqueous-phase oxidation of SO, occurs via a sequence of steps consisting of gas-phase diffusion, mass transfer at the gas-water interface, hydrolysis and ionization of the dissolved sulfur-IV, aqueous-phase diffusion, and oxidation reaction. Expressions are given for the characteristic times of these several processes for reaction in aqueous droplets. Readily applicable crite.ria are de...

We study the reactive displacement of two miscible fluids in channel flows and establish a quantitative link between fluid stretching chemical reactivity. At mixing interface, react according to instantaneous irreversible bimolecular reaction $A + B \rightarrow C$ . simulate advection–diffusion–reaction problem using random walk based particle method that is free numerical dispersion. The relat...

<p style='text-indent:20px;'>In this paper we analyse the asymptotic behaviour of some nonlocal diffusion problems with local reaction term in general metric measure spaces. We find certain classes nonlinear terms, including logistic type for which solutions are globally defined initial data Lebesgue prove satisfy maximum and comparison principles give sign conditions to ensure global bou...

the kinetic of the heterogeneous chemical reaction of aluminum hydroxide and fluosilicic acid was studied. it was found that the diffusion of the reactants through the porous silica coating to the aluminum hydroxide surface and the interfacial chemical reaction between the diffusing reactant and aluminum hydroxide platelets control the overall reaction rate. these two phenomena were studied and...