A novel optical sensor has been proposed for sensitive determination of bismuth ion basedon immobilization of 4-(4-nitrophenylazo)-1-naphthol on a triacetylcellulose membrane.Chemical binding of bismuth ions in solution with a 4-(4-nitrophenylazo)-1-naphtholimmobilized on the triacetylcelluse surface could be monitored spectrophotometrically. Theoptode shows excellent response over wide concent...

BACKGROUND/AIM Increasing resistance of Helicobacter pylori to antimicrobials necessitated the development of new regimens and the modification of existing regimens. The present study aimed to compare the efficacy of two bismuth-containing quadruple regimens-one including clarithromycin (C) instead of metronidazole (M) and triple therapy. PATIENTS AND METHODS Patients with H. pylori infection...

Although bismuth is widely used as a lead substitute in the industrial field, the toxicity of bismuth by inhalation is little known. We performed a 13-wk intratracheal intermittent bismuth dose toxicity study. Bismuth was administered at dose levels of 0, 0.8, 4, 20 mg/kg to male Crj:CD(SD)IGS rats (SPF) by intratracheal intermittent administration once a week for thirteen weeks to investigate ...

Clostridium difficile is a major nosocomial pathogen responsible for pseudomembranous colitis and many cases of antibiotic-associated diarrhea. Because of potential relapse of disease with current antimicrobial therapy protocols, there is a need for additional and/or alternative antimicrobial agents for the treatment of disease caused by C. difficile. We have synthesized a systematic series of ...

Biological methylation and hydride formation of metals and metalloids are ubiquitous environmental processes that can lead to the formation of chemical species with significantly increased mobility and toxicity. Whereas much is known about the interaction of metal(loid)s with microorganisms in environmental settings, little information has been gathered on respective processes inside the human ...

Bismuth is a chemical element symbolized as Bi and is a trivalent poor metal, which chemically resembles arsenic and antimony. Colloidal bismuth subcitrate (CBS) and bismuth subsalicylate are the bismuth salts widely used in the treatment of peptic ulcers, functional dyspepsia, and chronic gastritis. Intoxications with CBS are rare. In a few case reports, acute renal failure was described, but ...

Background: Based on the increase in antibiotic-resistant pathogens, it is necessary to have various effective compounds, so as to prevent the proliferation of these pathogens. For this purpose, nano-materials such as bismuth oxide nanoparticles can be used.Objectives: The aim of this study was to produce bismuth oxide nanoparticles by Bacillus lichenifor...

The marble used at construction sites creates a large amount of sludge after processing. Because waste has high calcium oxide content, it is often as concrete mix building material. In this study, the use in fabrication radiation shields was investigated for medical shielding applications. A sheet produced by mixing polymer and powder. method improving density developed to improve performance. ...