OBJECTIVE Mineral Trioxide Aggregate (MTA) is composed of Portland Cement (PC) and bismuth oxide (BO). Replacing BO for niobium oxide (NbO) microparticles (Nbµ) or nanoparticles (Nbη) may improve radiopacity and bioactivity. The aim of this study was to evaluate the radiopacity and cytotoxicity of the materials: (1) PC; (2) White MTA; (3) PC+30% Nbµ; (4) PC+30% Nbη. MATERIAL AND METHODS For t...

BACKGROUND/AIMS Helicobacter pylori eradication rates with standard triple regimens are worsening, and alternative treatments are urgently needed in some populations. The present study aimed to compare the efficacy of bismuth-based quadruple and concomitant regimens. METHODS Consecutive Helicobacter pylori-positive patients with non-ulcer dyspepsia were randomized to receive one of two regime...

The optical absorption of bismuth nanowires in the energy (wavenumber) range of 600 4000cm-1 is studied. Optical reflection and transmission spectra reveal that bismuth nanowires have a large and intense absorption peak as well as several smaller absorption peaks which are not measured in bulk bismuth. The smaller absorption peaks fit reasonably well to theoretical models for intersubband absor...

High quality ZnSe nanowires (NWs) and complementary ZnSe/CdSe core/shell species have been synthesized using a recently developed solution-liquid-solid (SLS) growth technique. In particular, bismuth salts as opposed to pre-synthesized Bi or Au/Bi nanoparticles have been used to grow NWs at low temperatures in solution. Resulting wires are characterized using transmission electron microscopy and...

Introduction: External radiotherapy is the most common method of radiotherapy which the most important problem associated with is that there is no difference between healthy and tumor tissues in dose absorption. One way to differentiate the dose sensitivity is to use metal-based nanoparticles. Bismuth oxide nanoparticles are good candidates for cancer radiotherapy. In this study, we investigate...

Abstract To solve the scientific problem of efficient removal singlet mercury from coal combustion flue gas, we propose to combine it with photocatalytic technology. We have successfully synthesized a novel material by growing iron oxide nanoparticles in situ on surface bismuth tungstate and analyzed physicochemical properties, chemical composition, morphological structure, optical properties X...