Barrier Formation

Self-organized pattern formation in coastal barrier

Schottky barrier formation between GaAs( 110) and alkali metals

The mechanism responsible of the Schottky barrier formation is anaiysed by considering a monolayer deposition of Li. Na or K on GaAs(ll0). These cases are studied by means of a free parameter consistent molecular orbital method. Che~so~tion energies. adsorption sites and Schottky barrier heights are calculated and found to be in good agreement with the experimental evidence. Our results tend to...

Rapid communication Epithelial barrier formation by airway basal cells

progression and airway hyperresponsiveness. However, mucosal permeability in allergic airBackground – Epithelial shedding processes in airway inflammation and defence way disease is a controversial issue and failures of physiological tests to corroborate an inmay produce damaged areas where basal cells are the main remaining epithelial cell creased inward perviousness of the airway mucosa in as...

Gradual Suppression of Transcytosis Governs Functional Blood-Retinal Barrier Formation

Blood-central nervous system (CNS) barriers partition neural tissues from the blood, providing a homeostatic environment for proper neural function. The endothelial cells that form blood-CNS barriers have specialized tight junctions and low rates of transcytosis to limit the flux of substances between blood and CNS. However, the relative contributions of these properties to CNS barrier permeabi...

Biofilm Barrier Formation and Per- Sistence in Variable Saturated Zones

A novel strategy for containment of contaminated groundwater consists of a biologically produced extracellular polysaccharide (EPS) barrier, i.e. biobarrier, within a subsurface formation. To bring this technology closer to field scale, a PVC column (12 inch [30.5 cm] diameter x 48 inches [121.9 cm] high) was constructed to examine the effects of thick biofilms in porous media under radial flow...