نتایج جستجو برای: bismuth shielding

تعداد نتایج: 15800  

Ali Niazi, Shiva Karimi Afshar

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...

2016
Murat Kekilli Ibrahim K. Onal Serkan Ocal Zeynal Dogan Alpaslan Tanoglu

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...

Journal: :Journal of occupational health 2005
Yuri Sano Hiroshi Satoh Momoko Chiba Atsuko Shinohara Masahide Okamoto Koji Serizawa Hiroshi Nakashima Kazuyuki Omae

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 ...

Journal: :Antimicrobial agents and chemotherapy 1999
D E Mahony S Lim-Morrison L Bryden G Faulkner P S Hoffman L Agocs G G Briand N Burford H Maguire

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 ...

Journal: :Drug metabolism and disposition: the biological fate of chemicals 2009
Jens Boertz Louise Michele Hartmann Margareta Sulkowski Joerg Hippler Frank Mosel Roland Arturo Diaz-Bone Klaus Michalke Albert Wolfgang Rettenmeier Alfred Vitalis Hirner

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 ...

2013
Abdulsamet Erden Samet Karahan Kadir Bulut Mustafa Basak Tuncay Aslan Ali Cetinkaya Hatice Karagoz Deniz Avci

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...

Journal: :Coatings 2023

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. ...

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