Finite Volume Methods for Diiusion Convection Equations on General Meshes
abstract Error estimates for the approximate solution of stationary or evo-lutive convection diiusion equations using a nite volume scheme on a general non structured mesh are presented here. These estimates only require a piece-wise regularity of the exact solution.
Analysis of cell centred finite volume methods for incompressible fluid flows
The aim of this review paper is to give some insight on some recent developments on the analysis of cell centred finite volume schemes for incompressible fluid flows. We first recall the cell centred finite volume scheme for convection diffusion equations, and give the mathematical tools which are needed for the convergence study. We then turn to the study of a recent scheme which was developed for anisotropic diffusion operators, and which is based on the construction of a discrete gradient. The third chapter is devoted to a colocated cell cantered finite volume method for the approximation of the incompressible Na-vier-Stokes equations posed on a 2D or 3D finite domain. We conclude with the discretization of Navier-Stokes equations with the full viscous stress tensor thanks to the previously mentioned discrete gradient.
Melanocins A, B and C, new melanin synthesis inhibitors produced by Eupenicillium shearii. I. Taxonomy, fermentation, isolation and biological properties.
New melanin synthesis inhibitors, melanocins A, B and C, were isolated from the fermentation broth and mycelium extract of Eupenicillium shearii F80695. Melanocin A, an isocyanide compound, inhibited mushroom tyrosinase and melanin biosynthesis of B16 melanoma cells with IC50 value of 9.0 nM and MIC value of 0.9 microM, respectively. Melanocin A also inhibited growth of Streptomyces bikiniensis. While, the structurally very related but non-isocyanide compounds melanocins B and C did not show inhibitory activity in these assays. Melanocins A, B and C showed potent antioxidant activity with scavenging activity of DPPH radical and superoxide anion radical.