Dynamic diffuser

Rossouw, C.J. and Bursill, L.A. (1985) Interpretation of dynamical diffuse scattering of fast electrons in rutile, Acta Cryst. A, 41, 320-327. 

ENZDYN - Dynamic Diffusion with Enzymatic Reaction System... 

MO LCAO methods, 34 136 Molecular-beam surface scattering, 26 26, 27 Molecular Cage, 34 226 Molecular design in cyclodextrin, 32 427 Molecular dynamics diffusion in zeolites, 42 2, 4-6 argon, 42 20... 

Figure 4 Effect on the serum stability of the incorporation of 5% cholesterol poly(ethy-lene glycol) (PEG) into cationic lipoplexes [hpopolyamine RPR209120/DOPE1/1, ratio (mol) lipid/DNA = 10 in 150 mM NaCl]. Lipoplexes were incubated in DMEM + 10% SVF, at 37°C, aliquots were regularly sampled and monitored by dynamic diffusion. Results represent a mean between three measurements. Error bars are not presented to simplify the graph, but differences among PEG, PEG-1, and PEG-2 are significant. Abbreviations PEG, poly(ethylene glycol) DOPE, dioleylphosphatidylethanolamine DMEM, Dulbecco s Modified Eagle Medium.

A number of typical applications of these techniques are illustrated in magnetic resonance, lattice dynamics, diffusion, optical properties, and intermolecular forces. 

Shalashilin and Thompson [46-48] developed a method based on classical diffusion theory for calculating unimolecular reaction rates in the IVR-limited regime. This method, which they referred to as intramolecular dynamics diffusion theory (IDDT) requires the calculation of short-time ( fs) classical trajectories to determine the rate of energy transfer from the bath modes of the molecule to the reaction coordinate modes. This method, in conjunction with MCVTST, spans the full energy range from the statistical to the dynamical limits. It in essence provides a means of accurately... 

Dynamic diffusion across a membrane in an irreversible first-order reaction is shown schematically in Figure 6.32. The diffusion process with the reaction is given as ... 

Molecular dynamics, diffusion, trans-bilayer translocation, and lipid exchange in bilayers... 

PHYSICAL PROPERTIES MOLECULAR DYNAMICS, DIFFUSION, TRANS-BILAYER TRANSLOCATION, AND LIPID EXCHANGE IN BILAYERS... 

Diffusion coefficients for sorbed solvent and ions in Nafion have been estimated using several techniques. Yeo and Eisenberg [53] studied the sorption of water by a dry slab of Nafion (EW 1155) and estimated the interdiffusion coefficient of water in the membrane over the temperature range 0-99 °C from the water uptake dynamics. Diffusion coefficients from these measurements increased with increasing temperature over the range (1-10) x 10 cm /s with a reported activation energy of 4.5 kcal/ mol (18.8 kJ/mol). The method used to estimate the diffusion coefficients by Yeo and Eisenberg [53] was based on the dependence of the uptake in the initial portion of the uptake curve and is probably not fully appropriate [82]). 

Guo. Y.. Shalashilin. D. V.. Krouse. J. A. and Thompson. D. L.(1999) Intramolecular dynamics diffusion theory approach to complex unimolecular reactions, J. Chem. Phys. 110, 5521-5525. 

Voter, A.F. Classically exact overlayer dynamics Diffusion of rhodium clusters on Rh(100). Phys. Rev. B 1986, 34, 6819-29. 

The first term of the RHS of Eqs. 6.105a and 6.105b accounts for static, axial, molecular diffusion. In the case of a straight cylindrical tube, there is no tortuosity nor constriction, 7 = 1. There is no eddy diffusion either, nor any A term in Eqs. 6.105a, by contrast to Eq. 6.90a. This is expected in the case of a cylindrical open tube, where the flow is ideally laminar, with no local eddies. The second term in Eq. 6.105a accoxmts for the dynamic diffusion related to the nonhomogeneity of the gas phase in the radial direction, because of the Poiseuille radial flow profile. 

Auerbach, S.M. Theory and simulation of jump dynamics, diffusion and phase equilibrium in nanopores. Int. Rev. Phys. Chem. 2000,19,155-198. 

Grisch, R, Attal-Tretout, B., Bresson, A., Bouchardy, R, Katta, V. R., and Roquemore, W. M. "Investigation of a Dynamic Diffusion Flame of H2 in Air with Laser Diagnostics and Numerical Modeling." Combustion and Flame 139 (2004) 28-38. 

The first term on the right is the usual Fick law or diffusive flux and A is the hydro-dynamic diffusion coefficient of the ion... 

As stated in the introduction, theoretical modeling linked to experimental verification has been identified as a priority area in which the focus of scientific resources may lead to rapid progress in catalysis. NMR studies of adsorbates on catalysts are well suited for determining dynamics, diffusion, and equilibrium structures and may be one of the best ways to experimentally verify the results of simulations. 

A complete theory of flow in porous media with dynamic-diffusive coupling requires that the governing equations contain both diffusion (du/dt) and inertial (d u/dt") terms (Fig. 10). 

Pr dynamic/thermal boundary layers Le thermal/diffusion boundary layers Sc dynamic/diffusion boundary layers... 

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