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Diffusivities molecular

Figure 10. Graph of Number of Compounds against Error % Obtained from the Linear Regression of the Graph of the Corrected Peak Dispersion (Z) against the Reciprocal of the Diffusivity Molecular Weight to the Power of 0.833... Figure 10. Graph of Number of Compounds against Error % Obtained from the Linear Regression of the Graph of the Corrected Peak Dispersion (Z) against the Reciprocal of the Diffusivity Molecular Weight to the Power of 0.833...
Diffusion in solution is the process whereby ionic or molecular constituents move under the influence of their kinetic activity in the direction of their concentration gradient. The process of diffusion is often known as self-diffusion, molecular diffusion, or ionic diffusion. The mass of diffusing substance passing through a given cross section per unit time is proportional to the concentration gradient (Fick s first law). [Pg.48]

Fig. 14.2. van Deemter plot showing contributions of eddy diffusion, molecular diffusion and mass transfer to the rate of band broadening. Picture courtesy of Prof. Harold McNair. [Pg.457]

From now on, we assume that the diffusion ( = molecular) transport is not negligible, so we need some expression relating the diffusion flux to measurable quantities, e.g.,... [Pg.419]

The B-term in the equation is the contribution to the plate height resulting from longitudinal diffusion (molecular diffusion in the axial direction) and arises from the tendency of the solute band to diffuse away from the band center as it moves down a column. It is proportional to the time that the sample spends in the column and also to its diffusion... [Pg.449]

In the free-molecule flow range, the drag on a sphere is given (Sll), for diffuse molecular reflection (cr = 1), by ... [Pg.276]

The burning velocity is controlled by the rates of chemical reactions and transport processes in the reaction zone, and chemical reaction rates vary exponentially with temperature and depend on the partial pressures of the reactants (concentrations). These arc strongly influenced by diffusion (molecular and/or eddy). Any treatment, therefore, which ignores these effects would not be complete. [Pg.32]

Under equivalent light exposure conditions, photolytic half-lives were determined for each of the individual TCDD isomers in dilute hydrocarbon solution and as a diffuse molecular dispersion on a clean soft-glass surface (Nestrick et al. 1980). The photolytic behavior of 2,3,7,8-TCDD was atypical compared to other TCDD isomers. In a hydrocarbon solution, 2,3,7,8-TCDD had the fastest decomposition rate (half-life 56.8 minutes) and 1,4,6,9-TCDD had the slowest decomposition rate (half-life 8,400 minutes [5.8 days]). The half-lives of the remaining TCDD isomers ranged from 153 to 1,388 minutes (2.55-23.1 hours). However, as a diffuse molecular dispersion on a glass surface, the... [Pg.451]

Keywords Adsorption surface diffusion molecular rotors self-assembly metal surfaces Scanning Tunneling Microscopy molecular nanoscience. [Pg.269]

Isotopes in diffuse interstellar clouds Ultravioletradiation can fractionate O isotopes in thin, or diffuse, molecular clouds. Ultraviolet starlight can penetrate such... [Pg.88]

A different chemical mechanism has been found in diffuse molecular clouds (see Astronomical measurements, above) by ultraviolet astronomy. Ultraviolet light capable of disrupting the CO molecule penetrates much deeper into CO-containing... [Pg.91]

Isotopes in diffuse interstellar clouds Ultraviolet radiation is observed to fractionate O isotopes in diffuse molecular clouds (see l60). [Pg.95]

Absorptivity for radiation Activity Activity coefficient, molal basis Coefficient of expansion a a T Diffusivity Molecular, volumetric Thermal Emissivity ratio for radiation Dv,8 a ft /(h) (ft) ft2/h a = k/cp, ft2 /h... [Pg.465]

Many new physical methods were developed in response to needs of spin chemists. In particular, the time-resolved EPR (TREPR) ° and time-resolved NMR (CIDNP) techniques were found to be of unparalleled utility in terms of mechanistic understanding of radical chemistry. Theoretical work to explain CIDNP and CIDEP phenomena was able to link, for the first time, the spin physics of radical pairs to their diffusion, molecular tumbling, confinement (solvent cages versus supramo-lecular environments ), and the effects of externally applied magnetic fields. ... [Pg.4]

All these different mechanisms of mass transport through a porous medium can be studied experimentally and theoretically through classical models (Darcy s law, Knudsen diffusion, molecular dynamics, Stefan-Maxwell equations, dusty-gas model etc.) which can be coupled or not with the interactions or even reactions between the solid structure and the fluid elements. Another method for the analysis of the species motion inside a porous structure can be based on the observation that the motion occurs as a result of two or more elementary evolutions that are randomly connected. This is the stochastic way for the analysis of species motion inside a porous body. Some examples that will be analysed here by the stochastic method are the result of the particularisations of the cases presented with the development of stochastic models in Sections 4.4 and 4.5. [Pg.286]

Axial Molecular Diffusion. Molecular diffusion can be an important cause of a spread in residence time, particularly at low velocities (low space velocities and short bed lengths) and with fluids of high diffusivity. Therefore, it is important in microreactors with gas flow. [Pg.11]

Cartesian coordinate vector (x, y, z) Molecular thermal diffusivity Turbulent thermal diffusivity Molecular kinematic viscosity Turbulent kinematic viscosity Karman constant Mass density See Eq. (26)... [Pg.244]


See other pages where Diffusivities molecular is mentioned: [Pg.82]    [Pg.584]    [Pg.531]    [Pg.237]    [Pg.372]    [Pg.297]    [Pg.268]    [Pg.142]    [Pg.249]    [Pg.322]    [Pg.86]    [Pg.55]    [Pg.173]    [Pg.34]    [Pg.357]    [Pg.322]    [Pg.80]    [Pg.271]    [Pg.124]    [Pg.505]    [Pg.184]    [Pg.511]   
See also in sourсe #XX -- [ Pg.573 ]




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A critique of the diffusion equation and molecular pair treatments

Adhesion molecular diffusion, interpenetration

Advection, Dispersion, and Molecular Diffusion

Advection, Turbulent Flux, and Molecular Diffusion

Anisotropic molecular self-diffusion

Binary molecular diffusion

Binary systems molecular diffusion

Bulk (Molecular) Diffusion

Carbon molecular sieve Knudsen diffusion

Controlling Molecular Diffusion in the Fluidic Lipid Bilayer

Diffusion Dependence from molecular weight

Diffusion Molecular dynamics

Diffusion Molecular statistical

Diffusion carbon molecular sieves

Diffusion coefficient molecular origins

Diffusion coefficient molecular weight dependence

Diffusion coefficients ordinary molecular

Diffusion constant molecular weight relationship

Diffusion in Molecular Crystals

Diffusion in Zeolites and Carbon Molecular Sieves

Diffusion limited molecular collisions

Diffusion molecular coefficients

Diffusion molecular displacements larger than

Diffusion molecular propagation

Diffusion molecular sieve pellets

Diffusion molecular size

Diffusion molecular weight

Diffusion molecular weight cutoff

Diffusion of Molecular Hydrogen

Diffusion radial molecular

Diffusion tensor molecular frame

Diffusion via molecular dynamics

Diffusion, eddy molecular

Diffusion-controlled oxidation molecular models

Diffusion-related molecular processes

Diffusion-related molecular processes characterizing

Diffusive flux molecular diffusivity coefficient

Diffusivities large molecular mobility

Diffusivity Molecular weight relationship

Diffusivity of Low Molecular Weight Components in Molten Polymers

Diffusivity, eddy molecular

Effective molecular diffusion coefficient

Energy transfer, molecular dyes in zeolite intrazeolite diffusion

Fick molecular diffusion

Fluorescence Correlation Spectroscopy on Molecular Diffusion Inside and Outside a Single Living Cell

Heat Conduction and Molecular Diffusion

Hemoglobin, diffusion molecular weight

High performance liquid chromatography molecular diffusion

How Can the Diffusion Coefficient Be Related to Molecular Quantities

I Molecular diffusion and reaction rates

Intracrystalline molecular diffusion

Kinetic-molecular theory diffusion

Knudsen regime, molecular diffusion

Living molecular diffusion

Longitudinal molecular diffusion

MOLECULAR EFFUSION AND DIFFUSION

Mass molecular diffusion

Mass transfer molecular diffusion

Mass transfer molecular diffusion coefficients

Mass transport molecular diffusion coefficient

Maxwell-Stefan approach Molecular diffusion

Mixing by molecular diffusion

Mixing molecular diffusion

Molecular Diffusion Plus Convection and Chemical Reaction

Molecular Diffusion and Brownian Motion

Molecular Diffusion in Biological Solutions and Gels

Molecular Diffusion in Solids

Molecular Dynamics diffusion coefficient

Molecular Speeds Diffusion and Effusion

Molecular analysis diffusion coefficient

Molecular diameter from diffusion

Molecular diffusion

Molecular diffusion

Molecular diffusion 1.4 INDEX

Molecular diffusion and reaction rate

Molecular diffusion applications

Molecular diffusion coefficient coefficients

Molecular diffusion coefficient in air

Molecular diffusion coefficient in water

Molecular diffusion constant

Molecular diffusion flow region

Molecular diffusion in gases

Molecular diffusion in liquids

Molecular diffusion in zeolites

Molecular diffusion models

Molecular diffusion particle

Molecular diffusion polymer

Molecular diffusion processes

Molecular diffusion rate

Molecular diffusion sieves

Molecular diffusion tensor

Molecular diffusion theory

Molecular diffusion time

Molecular diffusion tracer

Molecular diffusion transfer

Molecular diffusion, calculating

Molecular diffusion, definition

Molecular diffusion, effect

Molecular diffusion, effect dispersivity

Molecular diffusion, in porous

Molecular diffusion, nuclear magnetic

Molecular diffusion, nuclear magnetic interactions

Molecular diffusion, transport

Molecular diffusion, transport mechanism

Molecular diffusivity

Molecular diffusivity

Molecular diffusivity , definition

Molecular diffusivity at different

Molecular diffusivity coefficients

Molecular diffusivity in air

Molecular diffusivity in water

Molecular diffusivity, calculation

Molecular diffusivity, effect

Molecular diffusivity, effect model selection

Molecular dynamics and diffusion

Molecular dynamics simulation, diffusion

Molecular dynamics simulation, diffusion coefficient estimation

Molecular dynamics simulations, molten diffusion

Molecular hydrogen diffusion

Molecular models for diffusion

Molecular rotational diffusion

Molecular self-diffusion coefficient

Molecular weight of the diffusant

Molecular, generally diffusion

Of molecular diffusivity

Ordinary molecular diffusion

Ordinary molecular diffusion temperature dependence

Porous solids molecular diffusion

Residence time distribution molecular diffusion

Role of Micelles in Facilitating Molecular Diffusion

STEADY-STATE MOLECULAR DIFFUSION IN FLUIDS

Segmental diffusion molecular weight

Self-diffusion coefficients molecular structure dependence

Self-diffusion molecular weight

Spin echo diffusion molecular weights

Steady-State Binary Molecular Diffusion in Porous Solids

Steady-State Molecular Diffusion in Gases

Steady-State Molecular Diffusion in Liquids

Steady-state molecular diffusion

Stefan-Maxwell equations molecular diffusion

The Measurement of Solute Diffusivity and Molecular Weight

The Role of Molecular Diffusivity

Transfer by molecular diffusion

Transport phenomena molecular diffusion

Types molecular diffusion

Vitreous molecular diffusion

Zeolite diffusion molecular dynamics

Zeolite diffusion, simulations molecular dynamics

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