permeation


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per·me·a·tion

(per'mē-ā'shŭn),
The process of spreading through or penetrating, as the extension of a malignant neoplasm by proliferation of the cells continuously along the blood vessels or lymphatics.
[L. per-meo, pp. -meatus, to pass through]
Farlex Partner Medical Dictionary © Farlex 2012

per·me·a·tion

(pĕr-mē-ā'shŭn)
The process of spreading through or penetrating, as the extension of a malignant neoplasm by proliferation of the cells continuously along the blood vessels or lymphatics.
[L. per-meo, pp. -meatus, to pass through]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

permeation

(pĕr″mē-ā′shŭn) [L. permeare, permeate]
Penetration of and spreading throughout an organ, tissue, or space.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
When it's all said and done, what is really needed is the combination of chemical, abrasion and permeation resistance."
Pyrrolidones and their derivatives have great potential to be used as transdermal permeation enhancers.
The methotrexate permeation was found to be more with poly (acrylamide) patch as compared to poly (acrylamide-coacrylic acid).
5) Hydrogen permeation through the membrane is ruled by Sieverts' law (Sieverts, 1935).
According to the company, testing the oxygen permeation of whole packages has suffered in the past due to poor control of the test gas conditions if the package was tested in room air or required cumbersome set up of an independent environmental chamber that was often difficult to use.
During the permeation experiments, the pressure [P.sub.exp](t) in the analysis chamber is measured as a function of time: the analysis of the [P.sub.exp](t) curve by (2) permits to measure the permeation flux j(t) and to obtain the values of the D and [PHI] transport parameters.
In [13], the effect of inhibitors on hydrogen permeation was calculated by comparing permeation current with and without inhibitor.
SCLLs entrapping a hydrophilic fluorescent probe, sodium fluorescein (FL), and incubating with three fluorescent probes with different lipophilicities were used to observe SCLL leakage and fluidity, respectively, and compared with conventional in vitro skin permeation tests as well as skin impedance test to determine the effectiveness of this HTS technology.
Systech, which is headquarted in Oxon, UK, has been designing and manufacturing oxygen permeation and water vapour permeation analysers for many years, offering reliable and versatile testing of all films, packages and bottles.
This work addresses the possible use of micro-machined silicon wafers as low- rate water vapor permeation standards, addressing permeation rate as a function of hole area, reproducibility, and stability over time.
Thame, United Kingdom, December 01, 2014 --(PR.com)-- Systech Illinois, a leading manufacturer of permeation analysers and gas analysis equipment, has been chosen by FFP Packaging Solutions to measure the oxygen permeation of their flexible films.
Two polymers having complementary properties can be combined to simultaneously effect improvements in performance and cost for commercial applications [1], Permeation resistance is a primary criterion in the selection of polymers for barrier film applications.