Water vapor transmission rate (WVTR) was selected for studying the permeation
behavior of nanocomposite blends because of the simplicity of the test apparatus and the ease of analysis of the permeation
Microwave Treatment of Skin and Drug Permeation
2 which explained all the permeation
parameters with associated standard deviations(+- SD).
Priest said that, in terms of permeation
resistance, his firm's vinyl ester coatings (VE 62 and VE 62-AR) have moved the benchmark three decimal places.
However, the tortuous intercellular pathway is widely considered to provide the principal route and major barrier to the permeation
of most drugs.
Flextank vessels maintain their oxygen permeation
capability throughout their life, whereas barrels steadily lose it to become "spent" or "neutral" barrels after 4 or 5 years.
Figure 1 shows marked difference in methotrexate permeation
profile by changing the hydrogel cross linking density.
Never clean O-rings with solvents since they will absorb the solvent and then cause swelling that, in turn, greatly increases permeation
Designed for severe corrosion environments, series 434 can be trowel--or spray-applied on deteriorated substrates to form an extremely durable, low permeation
lining that protects concrete against harsh chemicals and abrasion.
And while this proved the durability of the materials, it still left the problem of vapor permeation
Until recently, there was no available data to predict their permeation