Citrate Precursor Method
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Preparation of Au/TiO2 Catalyst by a Liquid-Phase Reduction Method for Preferential Oxidation of Carbon Monoxide in a Hydrogen Rich-Stream (CO-PROX reaction)
Au nanoparticles supported on TiO2 were prepared by a liquid-phase reduction method using HAuCl4.3H2O as the Au precursor, TiO2 as the support, a solution of ethylene glycol/water as solvent and reducing agent and sodium citrate as reducing agent and stabilizer. The Au/TiO2 catalysts were prepared using different routes and characterized by Energy-dispersive
Mat. Res.. Publicado em: 18/12/2017
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2. Synthesis and Characterization of Cerium Molybdate Semiconductor Nanoparticles
Cerium molybdate semiconductive nanoparticles were synthesized by the EDTA-citrate combined complexation method. Gel thermal degradation behavior, phase formation, morphology, composition and band gap of cerium molybdate powders were characterized by TG/DSC, XRD, SEM/EDS and DRS analysis, respectively. The nanoparticles were synthesized by fixing the pH of t
Mat. Res.. Publicado em: 19/10/2017
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3. Effect of La 0.8 Sr 0.2 MnO 3 powder addition in the precursor solution on the properties of cathode films deposited by spray pyrolysis
ABSTRACT Films of lanthanum strontium manganite, LSM (La0.8Sr0.2MnO3) were deposited on yttria stabilized zirconia (YSZ) substrates by different methods aiming to establish the most suitable route to prepare cathodes for solid oxide fuel cells (SOFC). Samples were obtained by using a solution of lanthanum, strontium and manganese nitrates or a dispersion of
Matéria (Rio J.). Publicado em: 11/05/2017
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4. Innovative Coating Method of MgAl2O4 or ZnAl2O4 on α-Al2O3 Spheric Nuclei
Structured materials composed of α-Al2O3 spheres covered with a porous and thin layer of MgAl2O4 or ZnAl2O4 were obtained. The innovative coating method developed consists in the formation of a precursor gel of MgAl2O4 or ZnAl2O4 by citrate-nitrate combustion method. The alumina spheres are submerged in this gel and then submitted to a drying process in vac
Mat. Res.. Publicado em: 2015-04
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5. Síntese e caracterização de nanopartículas de TiO2 pelo método do precursor polimérico
Currently, scientific research in the field of nanotechnology has attracted growing interest because of its several applications, either through design of new products, materials characterization, production and application of structures, devices and systems in the form or function are features of the nanoscale. Thus, there is advancement in technology and i
Publicado em: 2010
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6. Co2Z hexaferrite obtained by the citrate precursor method in an inert atmosphere
Nanoparticles of Co2Z hexaferrite were synthesized by the citrate sol-gel process under an inert atmosphere, then thermally analyzed by Thermogravimetric and Differential Thermal Analysis and characterized by X-ray Diffraction, Scanning Electron Microscopy, Atomic Force Microscopy, X-ray Fluorescence and Vibration Sample Magnetometry. Z-type barium hexaferri
Matéria (Rio de Janeiro). Publicado em: 2008-06
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7. Síntese, sinterização e caracterização de ferritas à base de Ni-Zn
Were synthesized different ferrites NixZn1-xFe2O4 (0,4 ≤ x ≤ 0,6) compositions by using citrate precursor method. Initially, the precursors citrates of iron, nickel and zinc were mixed and homogenized. The stoichiometric compositions were calcined at 350C without atmosphere control and the calcined powders were pressed in pellets and toroids. The
Publicado em: 2008
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8. Síntese e caracterização da ferrita de MnZn obtida pelo método dos citratos precursores
It was synthesized MnZn ferrite with general formulae Mn1-xZnxFe2O4 (mol%), 0,3 ≤ x ≤ 0,7 by using the citrate precursor method. The precursors decomposition was studied by thermogravimetric analysis (TGA), differential thermogravimetric analysis (DTG), differential thermal analysis (DTA) and Fourier transform infrared (FTIR) of powder calcined a
Publicado em: 2007
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9. Estudo do equilibrio liquido-liquido, da partição de insulina e da pre-purificação da proteina de fusão precursora da insulina humana em sistemas aquosos bifasicos do tipo PEG/Sal / Study of liquid-liquid equilibrium, the partition of insulin and pre-purification of the fusion protein precursor of human insulin in aqueous biphasic systems of the type PEG / salt
In this work the primary purification of a fusion protein precursor of human insulin and produced by recombinant E. coli has been studied using aqueous two-phase systems. The fusion protein was provided by the pharmaceutical company Biobrás S.A (Montes Claros/Brazil) and was dissolved in 8M area. Partitioning essays of fusion protein were investigated in th
Publicado em: 2003
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10. Isolation of the nuclear yeast genes for citrate synthase and fifteen other mitochondrial proteins by a new screening method.
To isolate nuclear genes specifying imported mitochondrial proteins, a yeast genomic clone bank was screened by an RNA hybridization-competition assay. This assay exploited the fact that mRNAs for imported mitochondrial proteins are enriched in polysomes which are bound to the mitochondrial surface in cycloheximide-inhibited yeast cells. Clones selectively h
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11. Study of the Citrate Metabolism of Lactococcus lactis subsp. lactis Biovar Diacetylactis by Means of 13C Nuclear Magnetic Resonance
The metabolic fate of citrate and pyruvate in four strains of Lactococcus lactis subsp. lactis biovar diacetylactis has been studied by means of 13C nuclear magnetic resonance, using as a substrate either [3-13C]pyruvic acid or custom-synthesized citric acid that is 13C labeled either at carbons 2 and 4 or at carbon 3. The fermentations were carried out batc