PURPOSE To evaluate the necessity of draining more than one hepatic duct in malignant hilar obstructions. MATERIALS AND METHODS Two hundred seventeen self-expandable uncovered metallic stents (144 biliary Wallstents and 73 Memotherm nitinol stents) were placed percutaneously in 138 patients with unresectable malignant hilar obstructions. The patients included 76 men and 62 women, with a media...

Bismuth–lithium alloys are considered primary candidates for the reductive extraction step in on-line reprocessing of molten salt reactor fuel. The corrosion behavior molybdenum-based and Hastelloy® B-3 alloy (taken comparison) was examined here a liquid Bi–Li (5 mol.%) at 650 °C. MoW10, MoW30, TZM corrosion-resistant were studied as prospective construction materials holding bismuth–lithium al...

The purpose of this study was to determine the effects of repeated colloidal bismuth subcitrate administration on the cellular populations of the fundic region of the rat stomach and to investigate the effect of such treatment, after initial ethanol damage, on the gastric response to a second challenge by ethanol. The administration of 240 mg of colloidal bismuth subcitrate per kilogram body we...

Bismuth thin films deposited onto glass substrates by thermal sublimation are polycrystalline with short mean free paths, multiple grain orientations, and disappointingly small magnetoresistance when compared to single crystals. Direct deposition onto thin gold buffer layers followed by a post-deposition anneal leads to significantly improved properties, namely, large grains oriented in the tri...

Topological insulators (TIs) represent a novel category of material whose bulk insulates, but whose surface conducts. The ability to produce topological insulators would be of great interest, because electron states can cross the insulating band gap, as well as surface conduction and spin-locking properties [1]. Bismuth selenide (Bi2Se3) is one of the best candidates for three dimensional (3D) ...

Antimony(V) and bismuth(V) complexes of lapachol have been synthesized by the reaction of Ph₃SbCl₂ or Ph₃BiCl₂ with lapachol (Lp) and characterized by several physicochemical techniques such as IR, and NMR spectroscopy and X-ray crystallography. The compounds contain six-coordinated antimony and bismuth atoms. The antimony(V) complex is a monomeric derivative, (Lp)(Ph₃Sb)OH, and the bismuth(V) ...

Bismuth and zinc co-doped Y2O3 samples are synthesized by sol-gel method using ammonium hydroxide as a precipitating agent. Structural analysis is done by XRD, SEMEDAX and the optical properties are analysed by FTIR, UV-Vis absorption studies and photoluminescence (PL) studies. UV-Vis absorption studies show absorption only around 340 nm whereas PL shows peaks around 401 nm, 680 nm and 1020 nm ...

——A Bismuth-doped ber amplier (BDFA) in a double-pass conguration is proposed and demonstrated. The BDFA consists of a Bismuth-doped phosphogermanosilicate (BiPGeSiO2) ber pumped by a Titanium––Sapphire source at 810 nm. The BDFA has an amplied spontaneous emission (ASE) spectrum with a 3-dB bandwidth from 1220 to 1490 nm. The maximum gain of the proposed BDFA is 2.0 dB at an input signal ...

A mechanistic study to provide diagnostics of anodic stripping electrode processes at bismuth-film electrodes is presented from both theoretical and experimental points of view. Theoretical models for three types of electrode mechanisms are developed under conditions of square-wave voltammetry, combining rigorous modeling based on integral equations and the step function method, resulting in de...

A “wet chemistry” approach for isolation of At from an irradiated bismuth target is described. The approach involves five steps: (1) dissolution of bismuth target in conc. HNO3; (2) removal of the HNO3 by distillation; (3) dissolution of residue in 8 M HCl; (4) extraction of At from 8 M HCl into DIPE; and (5) extraction of At from DIPE into NaOH. Results from 55 “optimized” At isolation runs ga...