In situ diffuse reflectance UV-visible spectroscopy was used to measure the dynamics of catalyst reduction and oxidation during propane oxidative dehydrogenation (ODH) on VOx/gamma-Al2O3. Transients in UV-visible intensity in the near-edge region were analyzed using a mechanistic model of ODH reactions. Rate constants per site for the kinetically relevant reduction step (C-H bond activation) me...

Running title: Flow kinetics of coagulation factor Xa 1 SUMMARY The initial surface reactions of the extrinsic coagulation pathway on live cell membranes were examined under flow conditions. Generation of fXa (activated coagulation factor X) was measured on spherical monolayers of epithelial cells with a total surface area of 41-47 cm 2 expressing TF(tissue factor) at > 25 fmol/cm 2. Concentrat...

The initial surface reactions of the extrinsic coagulation pathway on live cell membranes were examined under flow conditions. Generation of activated coagulation factor X (fXa) was measured on spherical monolayers of epithelial cells with a total surface area of 41-47 cm(2) expressing tissue factor (TF) at >25 fmol/cm(2). Concentrations of reactants and product were monitored as a function of ...

The development of new synthetic fluorination reactions has important implications in medicinal, agricultural, and materials chemistries. Given the prevalence and accessibility of alcohols, methods to convert alcohols to trifluoromethanes are desirable. However, this transformation typically requires four-step processes, specialty chemicals, and/or stoichiometric metals to access the trifluorom...

The volume of raw range image data that is required to represent just a single scene can be extensive; hence direct interpretation of range images can incur a very high computational cost. Range image segmentation and feature extraction have been identified as mechanisms to produce more compact scene representations and hence enable less costly scene interpretation for applications such as obje...

The mechanism of energy conversion in a direct glycerol fuel cell (DGFC) is governed by the anode supported heterogeneous steps of glycerol electro-oxidation. In aerated alkaline electrolytes, glycerol also participates in a base catalyzed process, which can release certain species mixing with the anode catalyzed surface products. As a result, selective probing of the surface catalytic reaction...

Photoinduced absorption spectroscopy, PIAS, coupled with the measurement of dissolved O2, % is used to probe kinetics water oxidation by periodate, photocatalysed a P25 TiO2 film on glass. The rate rO2, depends upon ?0.9, where ? UV irradiance. In contrast, PIAS reveals steady-state change in absorbance film, ?AbsSS, proportional ?0.22, ?AbsSS direct measure concentration photogenerated holes s...