Metal Dynamics
Mostrando 1-12 de 66 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. THEORETICAL UNDERSTANDING OF MORPHOLOGICAL DISTRIBUTION OF HYDROGEN IN AMORPHOUS CALCIUM SILICATE HYDRATE
Determining the morphological distribution of hydrogen atoms in calcium silicate hydrate phase (C-S-H) is of great concern but challenging. In this work, based on the stoichiometric composition of (CaO)1.7(SiO2)(H2O)1.8, a series of amorphous Ca1.7•Si•(O)3.7-x•(OH)2x•(H2O)1.8-x models are constructed using Monte Carlo method, where x represents the m
Quím. Nova. Publicado em: 20/07/2020
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3. PREPARATION AND SIMULATION OF THE ON-LINE SiO2/S COATING FOR COKING INHIBITION IN THE INDUSTRIAL CRACKING FURNACE
Abstract Coke formation inside radiant coils is one of the main problems during thermal cracking of hydrocarbons. The on-line preparation of the coating for coking inhibition is a promising technology because it provides more flexibility to the operators on site. The SiO2/S coating was prepared on the inner surface of coils in an 8-year-served GK-VI industri
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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4. MAGNETOMETRIA IN-SITU PARA CARACTERIZAÇÃO DE MATERIAIS ELETRODEPOSITADOS
We have recently made studies of electrodeposits of Co onto graphene attached to different substrates, successfully performed via in-situ magnetization measurements. The magnetic analysis of deposits as a function of time lapse, indicate that Co grows with different magnetic characteristics from the beginning to the end of each run, independent of the substr
Quím. Nova. Publicado em: 18/07/2019
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5. Comportamento da corrosão microbiológica do aço duplex com aplicação de sais de quaternário de amônio
RESUMO A corrosão microbiológica tem causado diversos prejuízos para variados segmentos industriais que utilizam os materiais metálicos em seus sistemas. Uma forma de minimizar e até mesmo controlar os problemas causados pela corrosão microbiológica tem sido a aplicação de biocidas nestes sistemas. Neste trabalho, a corrosão microbiológica do aço
Matéria (Rio J.). Publicado em: 20/05/2019
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6. Heavy Metal Bioaccumulation in Enteromorpha intestinalis, (L.) Nees, a Macrophytic Algae: The Example of Kadin Creek (Western Anatolia)
ABSTRACT This study aims to specify the amount of ten heavy metals (Al, Cr, Mn, Ni, Cu, Zn, As, Cd, Hg, Pb) in water, sediment and Enteromorpha intestinalis samples gathered from Kadin Creek in seasonal periods in 2011 and 2012 and to reveal bioaccumulation capability of this macrophytic algae. In this regard, heavy metal concentrations in the gathered sampl
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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7. Numerical analysis of the liquid ejection due to the gaseous jet impact through computational fluid dynamics
Abstract Metal droplets generated by an impinging jet, play an important role in metal refining processes, mainly in oxygen steelmaking, where the droplets are ejected into the slag phase. Since the available interfacial area of droplets is very high in this process, the generated droplets enhance the rates of heat transfer and chemical reactions. Therefore,
REM, Int. Eng. J.. Publicado em: 2018-03
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8. Study of Glass Forming on Cu60.0Zr32.5Ti7.5 Alloy by Molecular Dynamics Simulation
This paper presents the results of Molecular Dynamics (MD) simulations of Cu60.0Zr32.5Ti7.5 alloy through the open source code LAMMPS. Amorphous samples were produced by quenching the molten metal from 2300 to 300 K. The pair distribution functions of the liquid and solid were calculated. Moreover, the atomic short-range order at 800, 700 and 300 K was obtai
Mat. Res.. Publicado em: 21/12/2017
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9. Simplified Analytical Approach to Evaluate the Nonlinear Dynamics of Elastic Cylindrical Shells Under Lateral Blast Loads
Abstract This paper presents an analytical solution to predict the nonlinear forced vibrations of elastic thin-walled cylindrical shells under suddenly applied loads. Interest in this problem is motivated by effects due to explosions on fluid-storage metal tanks. The model is based on the energy criterion due to Lagrange, in which the kinematic nonlinear rel
Lat. Am. j. solids struct.. Publicado em: 2016-07
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10. MATHEMATICAL MODELING OF BATCH ADSORPTION OF MANGANESE ONTO BONE CHAR
Abstract The present study investigated the dynamics of batch adsorption of manganese onto bone char by using two distinct mathematical formulations: the diffusion model and the shrinking core model. Both models assumed spherical particles and adequately described the transient behavior of metal adsorption under changing operating conditions. Comparatively,
Braz. J. Chem. Eng.. Publicado em: 2016-06
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11. Temporal dynamics of the response to Al stress in Eucalyptus grandis × Eucalyptus camaldulensis
A peroxidação lipídica e alongamento de raiz de Eucalyptus grandis × Eucalyptus camaldulensis foram estudados em resposta às condições de estresse com alumínio (Al), um metal conhecido por limitar a produtividade agrícola em solos ácidos, principalmente devido à redução do crescimento radicular. No Brasil, o híbrido Grancam 1277 (E. grandis ×
An. Acad. Bras. Ciênc.. Publicado em: 09/06/2015
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12. Multiple Dynamics of Hydrazone Based Compounds
Hydrazone derivatives of 2-quinolinecarboxaldehyde and 6-bromo-2-pyridinecarboxaldehyde were synthesized by sequence reactions with hydrazine derivatives. These compounds exhibited E/Z isomerization upon irradiation using a mercury lamp (250 W). The configurational changes were monitored by 1H nuclear magnetic resonance (NMR), UV-Vis and fluorescence spectro
J. Braz. Chem. Soc.. Publicado em: 2015-06