Electronic Emission
Mostrando 1-12 de 113 artigos, teses e dissertações.
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1. Designing and fabrication of a low-cost dip-coater for rapid production of uniform thin films
In this work, a self-made dip-coater equipment was developed for the fabrication of thin films. The assembly of the apparatus was carried out using simple mechanical and electronic pieces, recycle parts, and spending an inexpensive budget suitably. The production, software design, and features of the device were focused on the sol-gel dip-coating method, whi
Química Nova. Publicado em: 2022
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2. Complexes with Furyl-Substituted 3-Hydroxychromone: Synthesis, Characterization and Fluorescence Studies
2-(2-Furyl)-3-hydroxychromone (HL) reacts with MII ions in the formation of quadratic [Cu(L)2] (3), octahedral [M(L)2(OH2)2] (M = Co (1), Ni (2), Zn (4), Mn (5)) and seesaw [M(L)2] (M = Sn (6), Pb (7)) complexes. Recrystallization of complexes 1-3 in presence of pyridine lead to [M(L)2(py)2] (1a-3a) aducts. All compounds were characterized by Fourier transfo
J. Braz. Chem. Soc.. Publicado em: 2021-08
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3. Espectroscopia óptica de baixo custo: uma estratégia para a introdução de conceitos de física quântica no ensino médio
Resumo Neste artigo, reportamos a confecção e discutimos a aplicabilidade de um espectrômetro óptico de baixo custo como recurso didático para a introdução de conceitos de Física Quântica no ensino médio. O protótipo foi desenvolvido usando grade de difração comercial, lentes convergentes (lupas), webcam e o software Tracker para extração dos
Rev. Bras. Ensino Fís.. Publicado em: 29/04/2019
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4. Comunicação efetiva para a segurança do paciente: nota de transferência e Modified Early Warning Score
Resumo OBJETIVO Analisar o registro da Nota de Transferência (NT) e a emissão do Modified Early Warning Score (MEWS) realizados pelo enfermeiro em pacientes adultos transferidos do Serviço de Emergência como estratégia de comunicação efetiva para a segurança do paciente. MÉTODO Estudo transversal retrospectivo desenvolvido em um hospital de ensino
Rev. Gaúcha Enferm.. Publicado em: 29/04/2019
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5. Syntheses, Experimental and Theoretical Studies on Absorption/Emission Properties of Pyrazoline-Containing Aryl/Methoxynaphthyl Substituents
5-Aryl-3-(2-methoxynaphthalen-6-yl)-1-phenylpyrazoline derivatives were synthesized starting from (E)-1-(3-aryl)-(2-methoxynaphthalen-6-yl)-prop-2-en-1-one and phenylhydrazine. The compounds were characterized by 1H and 13C nuclear magnetic resonance (NMR), elemental analyses and mass spectrometry. Some compounds showed promising luminescence properties in s
J. Braz. Chem. Soc.. Publicado em: 2018-06
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6. Improved Electronic Structure and Optical Performance of Bi2Te3-xSex From First-principle Calculations Within TB-mBJ Exchange Potential
Using the first-principle calculations of density functional theory within the (FP-LAPW) method, we have investigated the structural, electronic and optical properties of Bi2Te3-xSex alloys with compositions x = 0, 1, 2 and 3 of Se. The generalized gradient approximation functional of Wu and Cohen (GGA-PBE) is used to calculate ground state structural parame
Mat. Res.. Publicado em: 17/11/2017
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7. Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles
ABSTRACT In this paper, nanocomposites with multiwalled carbon nanotubes (MWCNT) or graphene nanosheets were prepared using a high density polyethylene (HDPE) matrix. Two different processes were employed: a solution method and a melt mixing method. The crystallinity index of the HDPE showed similar levels in nanocomposites after the addition of carbon nanot
Matéria (Rio J.). Publicado em: 02/10/2017
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8. On the Fluorescent, Steric and Electronic Factors Affecting the Detection of Metallic Ions Using an Imidazolyl-Phenolic Derived Fluorescent Probe
The imidazolyl-phenolic probe used at the present study has its photophysic properties regulated by a tautomeric equilibrium. After the absorption of a photon, an excited state intramolecular proton transfer process generates a ketonic species, responsible for the 440 nm emission (in CH3CN/H2O, 95:5, v/v). Addition of Cu2+, Al3+, Cr3+ and Fe3+ suppresses emi
J. Braz. Chem. Soc.. Publicado em: 2017-10
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9. Determination of Inorganic Contaminants in Electrical and Electronic Equipment after Digestion Using Microwave-Assisted Single Reaction Chamber
A method for digestion of plastics from waste of electrical and electronic equipment (WEEE) was developed using the microwave-assisted wet digestion in single reaction chamber (MAWD-SRC). The determination of As, Cd, Co, Cr, Cu, Ni, Pb, Sb and Zn by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrom
J. Braz. Chem. Soc.. Publicado em: 2017-09
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10. Construction and measurement of an electromagnetic noise generator based on an automotive coil
This article covers the design of an electromagnetic noise generator which uses an automotive coil as the main component. A short theoretical analysis covers the generation of high voltage pulsed current from the available DC source originated from the battery. An electronic dimmer, a circuit used to control the brightness of a light, by controlling the effe
Rev. Bras. Ensino Fís.. Publicado em: 22/06/2017
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11. PERFORMANCE OF DIESEL ENGINE FUELLED WITH FOUR VEGETABLE OILS, PREHEATED AND AT ENGINE WORKING TEMPERATURE
ABSTRACT With the rise of restrictions imposed by law for gases emission, several technologies both for petrodiesel (PD) or diesel engines are been applied, such as the sulfur reduction and the injection electronic command, followed of gases recirculation and/or after-treatment. The utilization of biofuels is considered as an interesting option for pollutant
Eng. Agríc.. Publicado em: 2017-04
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12. Effects of Methyl-Substituted Phenanthrolines on the Performance of Ruthenium(II) Dye-Sensitizers
Tris-heteroleptic ruthenium(II) cis-[Ru(Me4-phen)(dcbH2)(NCS)2], where Me4-phen = 3,4,7,8-tetramethyl-1,10-phenanthroline, dcbH2 = 4,4'-dicarboxylic acid 2,2'-bipyridine, was synthesized, purified and characterized. Its characteristics were compared with those determined for cis-[Ru(Me2-phen)(dcbH2)(NCS)2] and cis-[Ru(phen)(dcbH2)(NCS)2] aiming to evaluate t
J. Braz. Chem. Soc.. Publicado em: 2015-11