The Experts below are selected from a list of 4638 Experts worldwide ranked by ideXlab platform
Shigeru Shimada - One of the best experts on this subject based on the ideXlab platform.
-
synthesis and structure of Bismuth Compounds bearing a sulfur bridged bis phenolato ligand and their catalytic application to the solvent free synthesis of propylene carbonate from co2 and propylene oxide
Chemical Communications, 2009Co-Authors: Shigeru ShimadaAbstract:Two Bismuth Compounds bearing a sulfur-bridged bis(phenolato) ligand were synthesized and found to show high catalytic activity and selectivity for solvent-free synthesis of propylene carbonate from CO2 and propylene oxide in the presence of iodide salts as co-catalysts at room temperature under 1 atm CO2.
Sridhar Komarneni - One of the best experts on this subject based on the ideXlab platform.
-
protein assisted synthesis of single crystal nanowires of Bismuth Compounds
Chemical Communications, 2005Co-Authors: Feng Gao, Sridhar KomarneniAbstract:Lysozyme, a protein, has been found to be a new morphology-directing agent and a simple and mild bio-molecule assisted method has been proposed for the synthesis of single-crystal Bismuth sulfide and oxide nanowires.
Qian Liu - One of the best experts on this subject based on the ideXlab platform.
-
A Strategy to Prepare Wafer Scale Bismuth Compound Superstructures
Small, 2013Co-Authors: Chuan Fei Guo, Jianming Zhang, Ye Tian, Meng Wang, Qian LiuAbstract:Epitaxial wafer scale superstructures of Bismuth Compounds are synthesized. Single crystalline β-Bi2O3 films are obtained by sputtering amorphous BiOx onto (001)-oriented strontium titanate with a buffer layer, followed by thermal crystallization. This is used as the precursor for the growth of the superstructures. The superstructures of Bismuth Compounds reveal anisotropic physical properties that are related to their unique morphology.
-
A General Strategy to Superstructured Networks and Nested Self-Similar Networks of Bismuth Compounds
ACS Nano, 2012Co-Authors: Chuan Fei Guo, Jianming Zhang, Ye Tian, Qian LiuAbstract:We have reported the synthesis of superstructured nanonetworks of BiOCl and nested nanonetworksof Bi2S3in aseriesoflattice-directed topotactic transformations [C. F.Guoetal. J. Am. Chem. Soc. 2011, 138, 8211� 8215]. Here we extend the transformations to a much broader system including ordered nanowall networks of BiOCl, BiOBr, Bi2O2CO3, β-Bi2O3, and Bi2S3, as well as nested self-similar networks of Bi2S3 and amorphous BiOx. We suggest even more superstructured networks and nested self-similar networks of Bismuth Compounds with a lattice parameter of ∼2 n/2 � 3.9 A (n = 0, 1, 2, 3, 4), might also be obtained. The
Inna M. Uchaeva - One of the best experts on this subject based on the ideXlab platform.
-
Thermodynamic properties of Bismuth Compounds and the configuration of (C6H5)3BiX2 (x = cl, ONO2) molecules from quantum-chemical data
Russian Journal of Inorganic Chemistry, 2004Co-Authors: Alexei N. Pankratov, Inna M. UchaevaAbstract:The standard entropies, heats of formation, and Gibbs free energies of formation are calculated using the PM3 method for some inorganic and organic Bismuth Compounds. The resulting linear relationships P e x p = bP t h e o r (where P is any of the aforementioned properties) allow an a priori determination of the thermodynamic parameters for Bismuth-containing Compounds. The quantum-chemical calculations well fit the adiabatic ionization potential of BiH 3 . An inference is made that dichlorotriphenylBismuth and dinitratotriphenyl-Bismuth in benzene solutions exist in the form of a trigonal bipyramid with chloro or nitrato axial ligands.
-
A Quantum Chemical Study of Bismuth Compounds Thermodynamic Properties and Configuration of Pentacoordinated OrganoBismuth Molecules
Phosphorus Sulfur and Silicon and The Related Elements, 2002Co-Authors: Alexei N. Pankratov, Inna M. UchaevaAbstract:By the PM3 method, standard values of entropy, heats, and free energies of formation have been computed for a series of inorganic and organic Bismuth Compounds. Linear dependences P exper = b P theor (where P is any of the mentioned properties) have been stated, allowing a priori evaluation of thermodynamic characteristics of Bi-containing substances. A quantum chemical calculation reproduces well the adiabatic ionization potential of BiH 3 . TriphenyldichloroBismuth and triphenyldinitratoBismuth existence in benzene solutions in the form of trigonal bipyramid with two axial chloro and nitrato ligands has been concluded.
Naoki Chiba - One of the best experts on this subject based on the ideXlab platform.
-
Effects of in vitro antibiotic resistance on treatment: Bismuth-containing regimens
Canadian Journal of Gastroenterology & Hepatology, 2000Co-Authors: Naoki ChibaAbstract:Bismuth Compounds remain useful for Helicobacter pylori eradication therapy. These include colloidal Bismuth subcitrate (CBS), Bismuth subsalicylate (BSS) and, most recently, ranitidine Bismuth citrate (RBC). CBS appears to prevent the development of imidazole resistance when coadministered with nitroimidazoles. Traditional triple therapy with Bismuth, metronidazole and tetracycline or amoxicillin (BMT/A) only partially overcomes metronidazole resistance. However, the addition of a PPI to Bismuth triple therapy largely overcomes established metronidazole resistance if treatment is given for at least one week or more. When RBC rather than PPI is used with clarithromycin, this dual regimen appears to be more effective in preventing the development of secondary clarithromycin resistance. The triple combination of RBC, metronidazole and clarithromycin appears to be effective against metronidazole resistant strains of H pylori. Thus, overall, there is some evidence that Bismuth Compounds may prevent the development of antibiotic resistance and that existing antibiotic resistance may at least be partially overcome in vitro and in vivo. With the growing emergence of H pylori resistance to metronidazole and clarithromycin, further research to clarify the role of Bismuth Compounds is required.
-
What is the role of Bismuth in Helicobacter pylori antimicrobial resistance
Helicobacter pylori, 2000Co-Authors: S. J. O. Veldhuyzen Van Zanten, Naoki ChibaAbstract:Bismuth Compounds have been used as therapeutic agents for more than two centuries. Use of Bismuth Compounds is well established in the treatment of Helicobacter pylori-associated gastritis and H. pylori-associated duodenal and gastric ulcers.1–4 There is also convincing evidence that Bismuth Compounds are efficacious in the treatment of traveller’s diarrhoea3,5, acute diarrhoea in children3,5, dyspepsia6, microscopic colitis7 and ulcerative colitis8,9, although Bismuth-containing Compounds are not the current standard of care. In microbiology there are opportunities for Bismuth regimens in the future. Apart from activity against H. pylori infection there is also evidence for antibacterial activity of Bismuth Compounds against Salmonella, Treponema, Neisseria and more recently Clostridium difficile 5,10.
