In this study, we perform an MPW1K investigation on the kinetic stability of a cyclic boryl anion. According to our calculation, the bulkier the R and R’ groups are, the more kinetically stable a five-membered boryl anion may be. Nitrogen should be a more efficient donor to increase the kinetic stability of a cyclic boryl anion than P, As, O, S and Se. Although, one nitrogen atom is enough to s...

We have investigated the kinetic temperatures assumed by Waters et al. (1987) for the circumstellar envelopes of a group of Be stars. Waters (1986) introduced a simple equatorial disk model with (r) / r ?n to describe the physical characteristics of Be star disks. Since this equatorial disk model was applied to a large number of stars, it is important to ensure that the kinetic temperatures ass...

We show that the binary homogeneous nucleation (BHN) of H2SO4-H2O can be treated as quasi-unary nucleation of H2SO4 in equilibrium with H2O vapor. A scheme to calculate the evaporation coefficient of H2SO4 molecules from H2SO4-H2O clusters is presented and a kinetic model to simulate the quasi-unary nucleation of H2SO4-H2O is developed. In the kinetic model, the growth and evaporation of sulfur...

A novel model consisting of basic micro-processes has been developed on the basis of the classic diffusion theory. It is first time that the concept of exchange rate has been introduced and the growing process of surfactant-mediated epitaxial thin-film growth has been simulated with Kinetic Monte Carlo (KMC) technique. The results of simulation found that the exchange reaction of RLA model is a...

This article summarizes the main features in the investigation of polymorphic behaviour of pharmaceuticals and emphasizes the role of combined thermoanalytical techniques for proper interpretation of complex problems. The examples illustrate the quality of information gained in relation to thermodynamic and kinetic factors.

(a) HA; (b) hydrolytic product of testicular, lysosomal or venom HYASE; (c) hydrolytic product of leech HYASE; (d) hydrolytic product of bacterial HYASE. sensitivity and the production of interfering precipitates, the Morgan-Elson assay cannot be used for kinetic investigation of the enzyme. Furthermore this assay is prone to interference from compounds such as disodium cromoglycate, (+ )-catec...

We present an investigation of a two-dimensional inelastic impact oscillator representing a friction force microscope. This paper includes the equations of motion, an analysis of the Jacobi matrix, and the fundamental domain. By applying periodic orbit theory to these and then calculating the diffusion, we find a possible link between nanotribology and everyday kinetic friction. Included is a s...