a catalytic-kinetic method for the determination of selenium is proposed. alizarin navy blue is reduced by sodium sulfide to from a colorless product. the reaction is accelerated by trace amounts of se (iv), and can be followed by measuring the decrease in absorbance of the dye at 620nm and 30 °c by the fixed time method. selenium can be determined in the range of 0.004 — 0.12 1.1g.m1-1 . ...

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1 A First-Passage Kinetic Monte Carlo Method for Stochastic Reaction-Drift-Diffusion Systems [20, 19] 1 1.1 Biological Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Mathematical Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Motivation and Methodology for Incorporating Drift into the FPKMC method 2 1.4 DL-FPKMC Results . . . . . . . . ....

We have developed atomic scale simulations of thin film growth using Kinetic Monte Carlo (KMC) method. We have applied the method to the two extreme cases of GaAs(100) growth and to the dry oxidation of Si(100), observing similar features. We show that these features are characteristics of molecule-surface interactions We consider that the molecules As2 and O2 are first adsorbed in the physisor...