The distribution and evolution of reactive species in a boundary layer characterized by the presence of shallow cumulus over land is studied by means of two largeeddy simulation models: the NCAR and WUR codes. The study focuses on two physical processes that can influence the chemistry: the enhancement of the vertical transport by the buoyant convection associated with cloud formation and the p...

A theoretical model describing the transport and kinetic processes involved in heterogeneous redox catalysis of solution phase reactants at electrode surfaces coated with redox active monolayers is presented. Although the analysis presented has quite general applicability, a specific focus of the paper is concerned with the idea that redox active monolayers can be used to model an ensemble of i...

To reduce the reactant concentration necessary for producing a newly synthesized thermoplastic lignocellulose from forestry waste, this study explores concept of recycle stream as chemical unit operation in reactive extrusion process. Modified first pass was returned to start process act lubricant feedstock. By action, high content could be extruded without requiring costly lubrication alternat...

I t has long been a chemist’s dream to catch a chemical reaction in the act. In a chemical reaction, reactant atoms or molecules pass over energy barriers, through transition states, and eventually convert into new chemical products. Chemists would like to observe and interfere with this process in mid-course and thereby control its outcome. The development of lasers that produce pulses of ligh...

The exact nature of the "rheumatoid factor" is unknown, but it appears to be an antibody-like substance composed of a gamma globulin complex of high molecular weight. Two groups of tests have been used to detect it: the haemagglutination test and the latex-fixation or Bentonite flocculation test. In the first group the indicator consists of sheep red cells with rabbit anti-sheep haemolysin as t...

In this paper we investigate the structure of the equilibrium state of three{dimensional catalytic super-Brownian motion where the catalyst is itself a classical super-Brownian motion. We show that the reactant has an in nite local biodiversity or genetic abundance. This contrasts the nite local biodiversity of the equilibrium of classical super-Brownian motion. Another question we address is t...

A two-phase 1-D pressure drop modeling scheme that incorporates the effect of local channel saturation on flow regime is introduced. The model provides a basis for extending two-phase pressure drop correlations from fundamental studies to more complex conditions within PEMFC reactant channels. The need for additional studies beyond the fundamental level is highlighted and key factors that separ...

In the present research, the selective oxidation of lauryl alcohol to lauraldehyde was studied under liquid-liquid phase transfer conditions using potassium chromate (K2CrO4) as an oxidizing agent and tetrabutyl ammonium bromide (TBAB) as the phase transfer catalyst. Chromium (VI) reagents are used in these oxidations since the alcohols are selectively oxidized <e...