1. Erythrocyte cation transport pathways have been investigated in a family with pseudohyperkalaemia. 2. Ouabain- and bumetanide-resistant Na+ and K+ effluxes in three pseudohyperkalaemic patients were not different from those of control subjects when assessed at 37 degrees C. 3. When the temperature was decreased to 20 degrees C and 9 degrees C, K+ passive permeability markedly increased and N...

Treatments that obturate dentin tubules have been used for reducing dentin hypersensitivity. The objective of this study was to determine the effects of multiple treatments with a mildly supersaturated calcium phosphate solution on the hydraulic conductance (Lp) of partially occluded dentin discs in vitro. The treatment solution contained 6.5 mmoll(-1) each of calcium and phosphate, 0.25 mmoll(...

In a previous publication3 it was shown that spinal transection is followed by a pronounced reduction of tissue permeability.' Since it is known that spinal reflex centers for the liberation of epinephrine are located in the thoracic segment of the splnal cord,4 and since Favilli reported a reduction in skin permeability after.epinephrine injections, the question arose as to whether the liberat...

BACKGROUND Defects in the small intestinal epithelial barrier have been associated with inflammatory bowel disease but their role in the causation of disease is still a matter of debate. In some models of disease increased permeability appears to be a very early event. The interleukin 10 (IL10) gene-deficient mouse spontaneously develops colitis after 12 weeks of age. These mice have been shown...

propose: standard electroporation and electrochemotherapy caused the endothe- lial cell permeability and reduction in tumor blood flow. the effects of low voltage and high frequency electroporation on the endothelial cells permeability and viability were expected. therefore, the propose of present study was to evaluate the effect of electroporation with bleomycin or alone on viability and perme...

fatty acid modified cellulose nanofibers (mcnfs) and tbhq antioxidant were added to poly(lactic acid) (pla) film. the combined effects of the mcnfs and tbhq on the morphological, thermal, mechanical and barrier properties of pla film were analyzed. the morphology of fracture surfaces evaluated by field emission scanning electron microscopy (fe-sem). xrd results showed that the crystallinity of ...

cyclizine (1-benzhydryl-4-methyl-piperazine, cas 82-92-8, cyc, i), a piperazine derivative, belongs to h1 antihistamine group of drugs that shows such pharmacological properties as anti-inflammatory, anti-allergic and anti-platelet effects, similar to other h1-receptor antagonists. in this study, two new tolyl and cumene derivatives of i (1-ethyl-4-[(p-isopropylphenyl) (p-tolyl) methyl]-piperaz...

We examined the effects of chronic hypertension and acute reduction of arterial pressure on the susceptibility of the blood-brain barrier (BBB) to disruption. The BBB was disrupted with an intracarotid injection of 1.6 M arabinose in spontaneously hypertensive rats (SHR), stroke-prone SHR (SHRSP), and normotensive Wistar-Kyoto (WKY) rats. Permeability of the BBB was determined from the ratio of...

Numerous studies have been presented, mainly in the petroleum literature, about permeability impairment of reservoir formations due to rock/drilling fluid interactions. For example, Glenn et a1;(1957) showed that mud particles can invade to an appreciable depth into the pores of a porous medium, form a "filter cake" in the pores, and cause a substantial reduction in the permeability of the inva...

Cardiovascular disease (CVD) is a major source of morbidity and mortality in the Western World. Premenopausal and estrogen-treated postmenopausal women have a lower incidence of CVD. It has been suggested that circulating endogenous estrogens are probably responsible for this protection. This study investigated the hypothesis that the reduction of endothelial permeability is responsible for car...