Electronic Paramagnetic Resonance
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Optical and Structural Studies of Mn2+ Doped SbPO4-ZnO-PbO Glasses
New glass compositions in the system 1-x(SbPO4-ZnO-PbO)-xMnO (with 0 ≤ x ≤ 20 in mol%) were prepared by melt-quenching methodology. Thermal, structural and optical properties of the new glasses were systematically studied by means of differential scanning calorimetry (DSC), UV-Vis and Raman spectroscopy, fluorescence and electronic paramagnetic resonance
J. Braz. Chem. Soc.. Publicado em: 2015-12
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2. SYNTHESIS,CHARACTERIZATION AND THEORETICAL STUDY OF ORTHO-SUBSTITUTED SCHIFF BASES AND THEIR COPPER(II) COMPLEXES AS POTENTIAL ANTITUMOR AGENTS / SÍNTESE, CARACTERIZAÇÃO E ESTUDO TEÓRICO DE BASES DE SCHIFF ORTO-SUBSTITUÍDAS E SEUS COMPLEXOS DE COBRE(II) COMO POTENCIAIS AGENTES ANTITUMORAIS
Nowadays, the neoplastic processes have been one of the most concern diseases. The malignance tumor, also called cancer, is the most aggravating pathological process, responsible for the death of the patient in most cases. In this context, several drugs have been designed with the objective to eliminate the cancer cells selectively; among them, some coordina
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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3. Investigation about the copper adsorption on the chloropropylsilica gel surface modified with a nanostructured dendrimer DAB-Am-16: an analytical application for determination of copper in different samples
The third generation (G-3) poly(propyleneimine)hexadecaamine dendrimer (DAB-Am-16) was grafted onto the chloropropylsilica gel surface (DPPIPS). The modified silica (DPPIPS) was characterized by Electronic (Uv-Vis), vibrational and Electron Paramagnetic Resonance (EPR), spectrocopies, surface area (331.07 m².g-1) and porosity analyses (pore diameter of 41.9
Mat. Res.. Publicado em: 22/11/2012
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4. Estudos da dinâmica estrutural da proteína ligante de cálcio S100A12 humana e da lisozima T4 / Structural dynamics studies of human calcium binding protein S100A12 and T4 lysozyme
The work presented here was conceived with two main objectives. The first one, more general, involved the implementation of a new methodology for the study of conformational changes in proteins, i.e., its structural dynamics. The technique of Site-directed Spin Labeling combined with Electronic Paramagnetic Resonance (SDSL-EPR) are the pillars of this new me
Publicado em: 2011
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5. Investigation of structural, electronic and magnetica properties of Ca2-xLaxFelrO6, Sr2-xLaxFelrO6 e TbMnO3 oxides / Investigação as propriedades estruturais, eletronicas e magneticas dos oxidos Ca2-xLaxFelrO6, Sr2-xLaxFelrO6 e TbMnO3
For many decades the transition metal oxides are subject of great scientific interest because of the wide variety of interesting physical properties and their potential technological applications. More recently, for example, oxides of transition metals with multiferroic properties have been considered as potential magneto-electronic devices. Many transition
Publicado em: 2010
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6. Immobilization of laccase on hybrid layered double hydroxide
Crystals of Mg/Al layered double hydroxide were synthesized by alkaline precipitation and treated in an aqueous solution of glutamic acid. The glutamate ions were not intercalated into the interlayer space, but were detected in the material by Fourier transform infrared spectroscopy, suggesting that only the external surfaces of crystals were modified with g
Química Nova. Publicado em: 2009
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7. Sínteses, caracterizações e estudo de pontos quânticos de calcogenetos de cádmio
CdS, CdSe, CdSxSe1-x and Cd1-xMnxS quantum dots were successfully grown in the glass matrix SNAB [40SiO2.30Na2CO3.1Al2O3.29B2O3 (mol%)] synthesized by the Fusion Method, when subjected to certain thermal treatment. The glass transition temperature (Tg) of the glass matrix SNAB was found by Differential Scanning Calorimetry (DSC) in order to set the temperatu
Publicado em: 2009
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8. Ordem-desordem: uma avaliação estrutural do Ba(ZrxTi1-x)O3 / Order-disorder: an evaluation structural of Ba(ZrxTi1x)O3
This work have as aim, the synthesis of ceramic powders of Ba(ZrxTi1x)O3 (x = 0, 0.25, 0.50, 0.75 and 1) by the polymeric precursor method and investigate the degree of structural order-disorder of these systems by different characterization techniques, such as: thermogravimetric analysis (TA), differential thermal analysis (DTA), X-ray diffraction (XRD), Ra
Publicado em: 2009
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9. Sistemas para manipulação quantica em estado solido / Towards an implementation of quantum manipulation in solid states
This thesis proposes and implements a system for quantum information processing, focusing primarily on the associated instrumentation. The basic physical aspects for computation, such as the associated energy and Shannon s entropy, were revisited. InAs:GaAs quantum dots were elected as the physical system of choice for this implementation; in particular, the
Publicado em: 2008
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10. Síntese e estudo das propriedades ópticas e magnéticas de pontos quânticos de Pb1-xMnxS crescidos em matrizes vítreas
In this Thesis PbS and Pb1-xMnxS quantum dots (nanocrystals), hosted in glass matrix, were synthesized and characterized. Optical absorption (OA), Electron Paramagnetic Resonance (EPR) and Magnetization curves (SQUID) were used to characterize the as-prepared nanocrystals. Within the range of 0.41 eV (gap of bulk PbS) to 3.5 eV (gap of bulk MnS) the OA bands
Publicado em: 2008
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11. Análises espectroscópicas da matéria orgânica de solos sob aplicação de águas residuárias / Spectroscopic analyses of soil organic matter under irrigation with trated wastewater
Around the world there is a growing competition for the use of water among several sectors of society. Water consumption in agriculture is large when compared to other types of use and can affect the availability of water for the urban population unless it is well administered. In Brazil, agriculture consumes about 61% of the total freshwater. Among the diff
Publicado em: 2008
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12. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008