water diffusion


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water diffusion

The movement of water into and out of cells, e.g., cells of the central nervous system after a stroke. Decreases in water diffusion are found when brain cells have been deprived of blood and oxygen.
See also: diffusion
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References in periodicals archive ?
Usually, water diffusion curves of a coating obey Fick's law with a diffusion step followed by a second step that is a saturation plateau.
Beaulieu, "The basis of anisotropic water diffusion in the nervous system--a technical review," NMR in Biomedicine, vol.
The mechanisms of water diffusion into the swelled hydrogel were investigated by (4).
In the second episode of psychosis, recurrent water diffusion and continued neuroinflammation lead to axonal damage and more serious neurodegeneration.
Bulk water diffusion is characterized by one constant, the apparent diffusion constant (ADC).
Comi, "A quantitative study of water diffusion in multiple sclerosis lesions and normal-appearing white matter using echo-planar imaging," Archives of Neurology, vol.
According to our results, one notices that the water diffusion process for the product during drying responds to sensible heat and requires energy ([DELTA][H.sup.*]>0) in order to promote changes, which is usually observed during a drying process.
Other key processes such as water diffusion, ion exchange (inter-diffusion) and precipitation of secondary minerals (i.e., clays, zeolites, etc) may be important in the long-term and they may occur in parallel to glass matrix corrosion.
It is assumed that the water diffusion inside the load is instantaneous, and surface evaporation affects the thermal field problem through its boundary conditions.
It is frequently reported in the literature that the water diffusion coefficient in different epoxy systems is around [10.sup.-8] to [10.sup.-10] [cm.sup.2]/s.
Instead, this is inferred from the drug release profile and models that make assumptions about the geometry, water diffusion and physical changes that occur.