Adaptive Optics Scanning Laser Ophthalmoscopy was used to noninvasively acquire videos of single-file flow through live human retinal parafoveal capillaries. Videos were analyzed offline to investigate capillary flow dynamics. Certain capillaries accounted for a clear majority of leukocyte traffic (Leukocyte-Preferred-Paths, LPPs), while other capillaries primarily featured plasma gap flow (Pla...

The hyaloid vessels form a capillary network on the inner surface of the retina. These capillaries are embedded in the vitreous humor, and they lack a glial investment. The intercellular spaces of the retina communicate with the ocular cavity, as can be evidenced by following the penetration of tracer substances. Hence, there is an extracellular diffusion pathway between hyaloid capillaries and...

In this work, we present observations about the transport of 15.2 keV electrons with a beam current 21 μA through macroscopic dielectric capillaries. These capillaries are made borosilicate glass an inner diameter 6 mm, and samples bending angle 90° 360° were investigated. The electron gun was adjusted, injected into capillary had divergence half 0.75°. A retarding field analyzer (RFA) installe...

The literature dealing with the permeability of blood capillaries is voluminous. Nothing appears to have been published, however, concerning the permeability of blood capillary sprouts and newly formed blood capillaries as compared to that of older capillaries. Yet this would seem to be a matter of some importance, since there now appears to be a general agreement (1) that the growth of the ent...

Abstract This paper analyzes the applicability of Eringen’s Generalized Continuum Theories as a model for human blood in microcirculation. The applied theory considers fluid with fully deformable substructure, namely micromorphic fluid. analysis is motivated by fact that itself can be considered suspension particles, i.e., red cells (RBCs), suspended Newtonian fluid, plasma. As consequence, non...

The ultrastructural features that are critical to the efficient functioning of the blood-brain barrier (b-bb) were quantified in typical barrier vessels, i.e., cerebral gray and white matter capillaries, and compared with the same parameters in cerebral nonbarrier capillaries (area postrema), and in somatic capillaries, (muscle) of the mouse. The image analysis was done with the help of a simpl...

A new analytical method has been developed for the quantification of polybrominated diphenyl ethers (PBDEs) in human adipose tissue samples. After Soxhlet extraction and a cleanup procedure using two successive solid-phase extraction cartridges containing acid silica and acid silica: neutral silica:deactivated basic alumina (from top to bottom), detection can been achieved by narrow-bore (0.10-...

PURPOSE The purpose is to evaluate effects of a new radiotherapy protocol, microbeam radiation therapy, on the artery wall. In previous studies on animal models, it was shown that capillaries recover well from hectogray doses of X-rays delivered in arrays of narrow (< or = 50 microm) beams with a minimum spacing of 200 microm. Here, short- and long-term effects of comparable microplanar beam co...