Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Jun. - 30 Sep. 1965

Miniature fuel cells as proposed solution to gassing and pressure rise problems in sealed silver-zinc batterie

Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Final report, 30 Jun. 1965 - 30 Jun. 1966

Gas pressure reduction in silver-zinc batteries by installing miniature hydrogen-oxygen fuel cel

Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Sep. - 30 Dec. 1965

Miniature fuel cells to eliminate pressure caused by gassing in sealed silver-zinc batterie

Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Dec. 1965 - 31 Mar. 1966

Miniature fuel cell as pressure regulators in silver-zinc batterie

Inorganic ion exchange membrane fuel cell quarterly progress report, period ending 10 apr. 1965

Inorganic ion exchange membrane for improving mass and heat transfer of fuel cells using palladium and platinum black as catalys

What the Private Sector Can Do to Corral Runaway CEO Pay

Franklin Strier, J.D., is a professor in the College of Business & Public Policy, California State University Dominguez Hills, Carson, CA 90747

Rescaling of diffusion coefficients in two-time scale chemical systems

We study reaction-diffusion systems which involve processes that occur on different time scales. In particular, we apply a multiscale analysis to obtain a reduced description of the slow dynamics. Under certain assumptions this reduction yields a new set of reaction-diffusion equations with rescaled diffusion coefficients. We analyze the Selkov model [E. E. Selkov, Eur. J. Biochem. 4, 79 (1968)] and the ferrocyanide-iodide-sulfite reaction [E. C. Edblom et al., J. Am. Chem. Soc. 108, 2826 (1986)] to determine whether the rescaling in this case may account for the difference of diffusivities that the formation of certain types of patterns requires. © 2000 American Institute of Physics.Fil:Strier, D.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Dawson, S.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

Analytical asymptotic solutions of nA+mB→C reaction-diffusion equations in two-layer systems: A general study

Large time evolution of concentration profiles is studied analytically for reaction-diffusion systems where the reactants A and B are each initially separately contained in two immiscible solutions and react upon contact and transfer across the interface according to a general nA+mB-->C reaction scheme. This study generalizes to immiscible two-layer systems the large time analytical asymptotic limits of concentrations derived by Koza [J. Stat. Phys. 85, 179 (1996)] for miscible fluids and for reaction rates of the form A;{n}B;{m} with arbitrary diffusion coefficients and homogeneous initial concentrations. In addition to a dependence on the parameters already characterizing the miscible case, the asymptotic concentration profiles in immiscible systems depend now also on the partition coefficients of the chemical species between the two solution layers and on the ratio of diffusion coefficients of a given species in the two fluids. The miscible time scalings are found to remain valid for the immiscible fluids case. However, for immiscible systems, the reaction front speed is enhanced by increasing the stoichiometry of the invading species over that of the species being invaded. The direction of the front propagation is found to depend on the diffusion coefficient of the invading species in its initial fluid but not on its value in the invading fluid. Hence, a reaction front in immiscible fluids can travel in the opposite direction to the reaction front formed in miscible fluids for a range of parameter values. The value of the invading species partition coefficient affects the magnitude of the front speed but it cannot alter the direction of the front. For sufficiently large times, the total amount of product produced in time is independent of the rate of the reaction. The centre of mass of the product can move in the opposite direction to the center of mass of the reaction rate.Journal Articleinfo:eu-repo/semantics/publishe