Introduction: Total joint replacement has long been the most effective treatment for severe arthritis in the hip. The most common clinical problem associated with the surgery is long-term aseptic loosening of the implant. The limited durability of the artificial joint, and the difficulty of revision surgery, have limited the potential applications of this treatment, particularly in younger and ...

The choked accretion model consists of a purely hydrodynamical mechanism in which, by setting an equatorial to polar density contrast, spherically symmetric flow transitions inflow-outflow configuration. This scenario has been studied the case (non-rotating) Schwarzschild black hole as central accretor, well non-relativistic limit. In this article, we generalize these previous works studying pe...

Perfusion studies were performed in healthy volunteers to test whether the secretory effect of conjugated bile acids, previously shown for the colon, was also present in the jejunum. A perfusion system with a proximal occlusive balloon (and continuous aspiration of duodenal secretions) was used; isotonic test solutions contained glycine-conjugated bile acids with or without lecithin. Fluid move...

Detailed atomistic molecular dynamics simulations were performed on monolayers of 4’-noctyl-4-cyanobiphenyl (8CB) adsorbed onto a surface of poly-m-alkanpyromellitimide (polym-APM), where m is the number of CH2 units between the imide moieties. Poly-3-APM and poly-4-APM surfaces served as model surfaces to investigate the influence of microscopic grooves, polar carbonyl groups exposed to the su...

The basic assumptions of van der Waals theory are contained in two well-known concepts: excluded volume (repulsive forces) and a homogeneous, isotropic field potential (attractive forces). We have superimposed on these, one more well-known concept: the existence of dimers, trimers, etc., at chemical equilibrium. With reasonable simplifying assumptions, we obtain a closed-form equation of state,...

Bicontinuous, interfacially jammed, emulsion gels (bijels) are a novel class of materials composed of two immiscible phases with interpenetrating domains that are stabilized by a monolayer of colloidal particles at the interface. However, existing bijel systems so far all consist of at least one polar fluid, which is believed to be essential to induce electrostatic repulsion for stabilizing int...

Niacin, a water-soluble vitamin belonging to the vitamin B group, has been known to cause various problems in the human body when deficient. The vitamin is derived from the diet and afterwards, niacin and its metabolites are secreted in blood or urine. It can be analyzed using liquid chromatography (LC) coupled to mass spectrometry, but niacin and its metabolites are very polar compounds. Recen...

This paper discusses a simulation obtained with the Geophysical Fluid Dynamics Laboratory ‘‘SKYHI’’ troposphere–stratosphere–mesosphere general circulation model run at very high horizontal resolution (;60-km grid spacing) and without any parameterization of subgrid-scale gravity wave drag. The results are for a period around the austral winter solstice, and the emphasis is on the simulated Sou...

The applicability of packed and open columns for supercritical fluid chromatography using pure carbon dioxide for the elution of a number of selected test components was investigated. It is shown that the number of solutes that can be eluted as symmetrical peaks is much larger in open-tubular capillary supercritical fluid chromatography. For strong hydrogen donors and acceptors, however, poor p...