Various processes have been proposed to account for this residual rate: water diffusion
, ion-ion-exchange reactions, network hydrolysis, and precipitation of secondary phases.
3) The objective here is not to further understand the chemistry of yellowing in epoxies, but to provide an example to demonstrate the complications arising when water diffusion
contributes to a chemical process as well as physical changes or other failures.
Though water diffusion
may prove to be a better proxy for brain activity than is blood flow, diffusion MRI remains a circuitous measure.
Cerebral water diffusion
in the group with lesser cognitive complaints was less than in those with MCI and greater than cognitively normal controls.
A crosslinking mathematical model based on water diffusion
and hydrolysis reaction confirms the influence of reaction rate and explains cracking differences between sealants.
Unlike pyogenic abscesses, the core tissue of rim-enhancing toxoplasma abscesses shows no restriction of water diffusion
, and the signal intensity of the abscess core on diffusion-weighted MRI is equal to or less than that of normal, unaffected cerebral white matter.
The basis of anisotropic water diffusion
in the nervous system - a technical review.
We can also use water diffusion
measurements with MRI to provide an indirect reflection of the density of the cells," she added.
This study focuses on the evaluation of water diffusion
through polyurethane coatings.
These ADC values are measures of magnitude of water diffusion
in the brain.
How do we detect water diffusion
in the brain with imaging?
dMRI & Diffusion Tensor Imaging Diffusion MRI (dMRI) measures the rate and direction of water diffusion
in the body.
Additionally, the PEG chains are located in the free space of crosslinked polymer networks; therefore water diffusion
is prevented by the PEG chains.
The subjects were put in an MRI scanner that was programmed to be sensitive to water diffusion
along the axons of the brain to measure microscopic features of the brain's circuitry.
The higher values of MD in MS lesions are consistent with the findings in studies (22,23) of experimental allergic encephalomyelitis (EAE) (an animal model of MS), in which water diffusion
was found to be increased in the experimental pathology, suggesting that inflammatory demyelination in MS can result in changes on DTI (Figure 1).