This parameter was followed as a function of immersion time, enabling calculation of the water diffusion
according to the Brasher-Kingsbury equation (2).
Bulk water diffusion
is characterized by one constant, the apparent diffusion constant (ADC).
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.
Diffusion-weighted MRI is a noninvasive method for the measurement of diffusion of water in the frame of discs in vivo and, so it is suited for clinical exams evaluating pathologic degenerations in water diffusion
related to disc disease.
Hydrolytic degradation of members of the polylactide/ glycolide family proceeds through four stages as represented in Figure 2: First stage of water diffusion
followed by second stage, in which oligomers with acidic end-groups autocatalyze the hydrolysis reaction.
Other key processes such as water diffusion
, ion exchange (inter-diffusion) and precipitation of secondary minerals (i.
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.
Instead, this is inferred from the drug release profile and models that make assumptions about the geometry, water diffusion
and physical changes that occur.
In healthy white matter, myelinated axon bundles selectively restrict water diffusion
, so that the water molecules tend to move along the white matter tracts but not in a perpendicular direction.
Some claim that the signal may have been caused by changes in blood flow, not water diffusion
Reducing the pressure of the water that is entering the body is easy, but the rate of water diffusion
across a barrier is also dependent on the barrier preventing uncontrolled flow into and out of the cell.
The overall translational water motion, characterized by the ADC values, and the anisotropic component of water diffusion
, characterized by the FA values, were calculated on a voxel-by-voxel basis.
DTI relies on the principle that water diffusion
is affected by the properties of the medium in which it occurs.
The first is the diffusion constant value, Day, which gauges water diffusion
in brain tissue.