diffusion coefficient


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diffusion coefficient

[də′fyü·zhən ‚kō·i′fish·ənt]
(physics)
The weight of a material, in grams, diffusing across an area of 1 square centimeter in 1 second in a unit concentration gradient. Also known as diffusivity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The chloride diffusion coefficient is the most important parameter when predicting the chloride ingress in concrete.
Jiang et al., "Value of whole-lesion apparent diffusion coefficient (ADC) first-order statistics and texture features in clinical staging of cervical cancers," Clinical Radiology, vol.
OPC-[H.sub.2]O exhibited higher apparent diffusion coefficient ([D.sub.app]) values than blended cements.
The geometric factor G relates the diffusion coefficient in a porous medium to the corresponding diffusion coefficient [D.sub.0] ([m.sup.2]/s) in water and is defined by
Additionally, diffusion-weighted imaging (DWI) and apparent diffusion coefficients (ADCs) depend on the composition of the parotid gland as well as the different histological types of the parotid tumors.
In this study, three different effective diffusion coefficients were calculated for water and sucrose under the conditions used for osmotic treatments.
Samples that presented higher stationary permeation currents ([I.sub.[infinity]]) also showed higher values of effective diffusion coefficient ([D.sup.eff]).
Depending on different values of [sigma], solutions of the equation of the diffusion coefficient may be varied in a complete set.
The diffusion coefficient of water vapor is three to four orders of magnitude smaller in lumens than water vapor diffusion coefficient in free water (Siau 1995).
From this comparative graph, it can be easily seen that how much the diffusion coefficient decrease down with substituent group and what is the extent of shift in reduction and oxidation potentials (and extent of shift in oxidation and reduction potentials).
Diffusion in general is a thermoactived process and the diffusion coefficient is very sensitive to temperature of immersion.
DWI with apparent diffusion coefficient (ADC) analysis is widely used for tumor characterization in clinic (14).

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