Understanding the relevant permeability properties of ultrafiltration membranes is facilitated by using materials and procedures that allow a high degree of control on morphology and chemical composition. Here we present the first study on diffusion permeability through gyroid nanoporous cross-linked 1,2-polybutadiene (1,2-PB) membranes with uniform pores that, if needed, can be rendered hydrop...

This paper proposes a model for the electromagnetic performance of dual air-gap liquid-cooled eddy current retarder (DAL-ECR) considering transient permeability. First, structure and working principle DAL-ECR are introduced. Next, analysis static flux density leakage end effect is established based on piecewise function method magnetic equivalent circuit (MEC). Then, skin field in retarder, an ...

Iodine goitre and hypothyroidism in 5 newborn infants in an intensive care unit were induced by cutaneous absorption of iodine, after numerous skin applications of iodine alcohol. The infant's skin permeability allows severe iodine overloading of the thyroid, resulting in goitre and hypothyroidism. Ioduria should always be sought in a newborn infant showing hypothyroidism. Iodine should not be ...

Investigation of the permeability of membranes is most important for biology. The complicated and variable permeability of biological membranes cannot be understood before the simpler conditions in artificial membranes of different qualities have been satisfactorily explained. After M. Traube in 1867 had developed the copper ferrocyanide membrane and Pfeffer published his investigations, the pr...

We will report on crosslinking of ceramides molecules in the stratum corneum of a live pig by non-equilibrium atmospheric pressure asymmetric dielectric barrier discharge treatment. This crosslinking leads to formation of temporary pores in the skin, leading to increased permeability of the skin which we have validated with vitamin D.

Urocortin (Ucn) is related to corticotropin-releasing hormone (CRH), and both are released in the brain under stress where they stimulate CRH 1 and 2 receptors (CRHR). Outside the brain, they may have proinflammatory actions through activation of mast cells, which are located perivascularly close to nerve endings and degranulate in response to acute psychological stress. Here, we report that a ...

Previous studies indicate that the transfer of proteins and other substances between synovial fluid and blood is more extensive for rheumatoid arthritics than for normal persons (Harris, Millard, and Banerjee, 1958; Platt, Holley, and Pigman, 1957; Michelazzi, 1943). The protein concentration in synovial fluid is also higher for rheumatoid arthritics than for healthy individuals (Platt and othe...

Skin permeability and local blood perfusion are important factors for transdermal drug delivery. Application of heat is expected to enhance microcirculation and local perfusion and/or blood vessel permeability, thus facilitating drug transfer to the systemic circulation. In addition, heating prior to or during topical application of a drug may facilitate skin penetration, increase kinetic energ...

The goal of this investigation was to measure changes in vascular permeability, pore cutoff size, and number of transvascular transport pathways as a function of time and in response to vascular endothelial growth factor (VEGF), placenta growth factor (PIGF-1 and PIGF-2), or basic fibroblast growth factor (bFGF). Two human and two murine tumors were implanted in the dorsal skin chamber or crani...