Metal Transfer
Mostrando 1-12 de 272 artigos, teses e dissertações.
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1. Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands
In this work, the emission properties of fac-[Re(CO)3(NN)(py)]+, NN = 1,10-phenanthroline (phen), dipyrido[3,2-f:2’,3’-h]quinoxaline (dpq) and dipyrido[3,2-a:2’3’-c]phenazine (dppz); py = pyridine were investigated in different temperatures, ranging from 80 to 300 K, and in different solvent mixtures and in polymethyl methacrylate. The changes observ
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Aqueous Extract of Cumaru (Dipteryx odorata) Seeds as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution
The corrosion inhibition of mild steel by aqueous extract of cumaru (Dipteryx odorata) seeds and its high molecular weight fraction (HMWF) was investigated in 1 mol L-1 HCl solution. The study was carried out through gravimetric essays, open circuit potential measurements, anodic and cathodic polarization curves and electrochemical impedance analyses, as wel
J. Braz. Chem. Soc.. Publicado em: 2021-02
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3. Behavior of the effective heat transfer coefficient and global thermal resistance in freezing of fruit juice model solutions in cylindrical packages
Abstract In this study the effect of packing on freezing time, effective heat transfer coefficient and global thermal resistance were evaluated during the freezing of fruit juice model solution in an air blast freezer. Two configurations were arranged with 40 buckets and 15 kg of solution in each, totaling 600 kg. Thermocouples were installed to monitor the
Food Sci. Technol. Publicado em: 2020-12
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4. Photoluminescent Investigation of the Doping Site of Eu3+-Doped [Zn3(BTC)2·12H2O] Metal-Organic Framework Prepared by Microwave-Assisted Hydrothermal Synthesis
The [Zn3(BTC)2·12H2O] (BTC = 1,3,5-tricarboxylate) metal-organic framework (MOF) was successfully synthesized using a microwave-assisted hydrothermal synthesis technique, which allowed for significantly decreased reaction time compared to the production of the same compound via conventional heating. In situ doping with Eu3+ ions at concentrations ranging fr
J. Braz. Chem. Soc.. Publicado em: 2020-11
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5. Sunlight-Driven Dehydrogenative Oxidation Photocatalysis by a Mononuclear Complex Acting as both Chromophore and Catalyst
Under simulated solar irradiation in the visible spectral region, the catalytically active RuIV-oxo species [Ru(O)(bpy)(tppz)]2+ (tppz = tetrapyridylpyrazine, a strongly π-accepting tridentate N, N, N-ligand) is produced directly from a single metal-to-ligand charge-transfer (MLCT) photoexcitation of the resting RuII-aquo complex [Ru(H2O)(bpy)(tppz)]2+ in a
J. Braz. Chem. Soc.. Publicado em: 2020-11
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6. A Simple Fluorescent Chemosensor for Detection of Zinc Ions in Some Real Samples and Intracellular Imaging in Living Cells
A new designed fluorescent chemosensor TYMN ((E)-1-((thiazol-2-ylimino)methyl)naphthalen-2-ol) for highly sensitive and selective tracing of trace amount of Zn2+ ions in some real samples was synthesized and characterized. The sensor TYMN can detect Zn2+ ions via fluorescence enhancement with a high selectivity over a wide range of metal ions, especially Cd2
J. Braz. Chem. Soc.. Publicado em: 2020-08
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7. RAMAN STUDIES OF BIS(PHENYLTERPYRAZINE)IRON(II) AND SUPRAMOLECULAR SPECIES WITH PENTACYANIDOFERRATE(II) IONS
The chemistry and spectroscopy of the iron(II) phenylterpyrazine complex, [Fe(phtpz)2]2+, were investigated in comparison with the analogous phenylterpyridine species, Fe(phtpy)2]2+, and the results indicated a strong electronic delocalization on the Fe(II) terimine chromophore encompassing the lateral pyrazyl groups. The delocalized nature of the molecular
Quím. Nova. Publicado em: 05/12/2019
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8. Efeitos da Espessura da Fita Metálica no Metal de Solda Utilizando Cavacos de Titânio Como Componentes do Fluxo em Arames Tubulares para a Formação de TiC
Resumo Cavacos de titânio foram utilizados como componentes do fluxo em arames tubulares fabricados a partir da conformação e trefilação de fitas metálicas com espessuras diferentes. Os arames apresentaram diâmetros internos com dimensões diferentes afetando as taxas de preenchimento do fluxo. Para as mesmas condições de soldagem, os arames fabric
Soldag. insp.. Publicado em: 02/12/2019
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9. Nanoparticles of Fe2O3 and Co3O4 as Efficient Electrocatalysts for Oxygen Reduction Reaction in Acid Medium
This paper presents a comparative study about the oxygen reduction reaction (ORR) catalyzed by nanoparticles of Fe2O3 and Co3O4 applied on the surface of glassy carbon electrodes (GCE). The nanoparticles were synthesized using the modified polymeric precursor method (Pechini). These two nanomaterials were characterized by Fourier transform infrared spectrosc
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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10. Kirschner Wire Migration after the Treatment of Acromioclavicular Luxation for the Contralateral Shoulder - Case Report
Resumo O uso dos fios metálicos, denominados fios de Kirschner, é um método de fixação simples e eficaz para a correção de fraturas e luxações do ombro na cirurgia ortopédica. Uma das possíveis complicações é a migração do fio durante o acompanhamento pósoperatório. Os autores apresentam um caso de um paciente masculino de 48 anos, administ
Rev. bras. ortop.. Publicado em: 03/06/2019
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11. Avaliação do chá branco como potencial inibidor de corrosão
RESUMO O trabalho apresenta avaliação do extrato alcoólico do chá branco como potencial inibidor de corrosão para o aço carbono P110 na presença de ácido clorídrico 1 mol.L-1. Os inibidores de corrosão destacam-se na proteção de peças metálicas em ambientes ácidos, sendo que muitas das substâncias presentes na composição de inibidores comer
Matéria (Rio J.). Publicado em: 20/05/2019
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12. Uso do diafragma externo na ligação entre viga de seção I e pilar tubular de seção circular
Resumo O diafragma externo na ligação entre viga metálica de seção I e pilar metálico tubular de seção circular tem por objetivo o aumento na eficácia da transferência dos esforços. A proposta é dar alternativas ao uso desse sistema estrutural, reduzindo a limitação imposta por sua simples ligação ao se adicionar esse elemento, similar a um a
Ambient. constr.. Publicado em: 2019-03