Crystalline Fields
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. IMPLEMENTAÇÃO DO CAMPO DE FORÇA CLAYFF NO GROMACS: UMA APLICAÇÃO EM ESTRUTURA DE CAULINITA
Molecular dynamics techniques are increasingly being used for material science studies, being a theoretical approach based on molecular mechanics studies. GROMACS is a free software that allows the development of simulations of various types of molecules, from biological molecules to inorganic structures associated with the area of materials, requiring the s
Quím. Nova. Publicado em: 2020-06
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2. Evaluation of the Toxicity of Silver/Silica and Titanium Dioxide Particles in Mammalian Cells
ABSTRACT The increasing concern over the spread of diseases has lead to a high consumption of antimicrobial additives in the medical and industrial fields. Since these particles can lixiviate from loaded materials, the contact between this additive and mammalian cells can occur during manufacture, use and disposal of the products. Silver on fumed silica (AgN
Braz. arch. biol. technol.. Publicado em: 14/11/2018
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3. Caracterización del proceso de fabricación de macroporos sobre sustrato de silicio por método electroquímico
ABSTRACT In the present work, the fabrication process of a set of micropores on crystalline silicon wafers manufactured through wet etching technique was studied. The influence of different control factors such as voltage, temperature and braking agent on the specific characteristics of formation was evaluated. An exhaustive analysis of the evolution of elec
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Cellulose-reinforced composites: from micro-to nanoscale
This paper present the most relevant advances in the fields of: i) cellulose fibres surface modification; ii) cellulose fibres-based composite materials; and iii) nanocomposites based on cellulose whiskers or starch platelet-like nanoparticles. The real breakthroughs achieved in the first topic concern the use of solvent-free grafting process (plasma) and th
Polímeros. Publicado em: 2013
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5. Gas separation unit by adsorption : simulation and adsorbent characterization / Unidade de separação de gases por adsorção : simulação e caracterização do adsorvente
Zeolites are crystalline porous materials found naturally or synthetically manufactured with high adsorbent power. The study of this material as an industrial adsorbent began in the mid 50 s. The fields of zeolite application are rather wide. Zeolites have been used as adsorbents for purification of gases and liquids, as catalysts for petroleum refinig and f
Publicado em: 2009
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6. Doping phase diagrams of the heavy fermions Ce2MIn8 (M = Rh, IR) / Efeitos da substituição quimica nos diagramas de fases dos fermions pesados Ce2MIn8 (M = Rh e Ir)
This thesis describes the investigation of the physical properties of the (Cd, Sn, Ga)-doped Ce2MIn8 (M = Rh, Ir) intermetallic compounds. Temperature dependent magnetic susceptibility, heat capacity and electrical resistivity measurements were performed to characterize the macroscopic properties of the synthesized compounds. X-ray powder diffraction were us
Publicado em: 2009
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7. Physicochemical characterization of two deproteinized bovine xenografts
Calcium phosphate salts, or more specifically hydroxyapatite, are products of great interest in the fields of medical and dental science due to their biocompatibility and osteoconduction property. Deproteinized xenografts are primarily constituted of natural apatites, sintered or not. Variations in the industrial process may affect physicochemical properties
Brazilian Oral Research. Publicado em: 2008-03
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8. Ultrasonic study of structural instabilities in nickel induced by magnetic fields
The ultrasonic phase velocity was measured on a high purity nickel single crystal with a bias magnetic field in cooling and heating runs over the interval of temperatures from approximately 100 to 325 K. An evident anomaly of the phase velocity was observed in both branches of the temperature cycle. The temperature of the anomaly in the heating run was alway
Materials Research. Publicado em: 2008-03
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9. Formación de precipitados gamma de morfologia dendrítica en una matriz beta CuZnAl
The isothermal aging of beta phase in some CuZnAl of adequate composition, promotes the nucleation of a gamma phase that then grow by means of a diffusion controlled process. In the first stages the morphology is spherical and cuboidal, but it develops to more complex geometries such as a laminar growth or dendrites, as a result of the competition between th
Matéria (Rio de Janeiro). Publicado em: 2007-12
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10. Propriedades Magneto-Ópticas do Pb(x)Eu(1-X)Te COM 0 ≤ x ≤ 0.2 / MAGNETO-OPTICAL PROPERTIES OF Pb(x)Eu(1-X)Te WITH 0 ≤ x ≤ 0.2
The optical properties of epitaxial samples of PbxEu1-xTe with 0 ≤ x ≤ 0.2 have been investigated by photoluminescence measurements at various temperatures and magnetic fields and through transmittance and reflectance measurements at room temperature. The samples were grown by molecular beam epitaxy in a Riber 32p MBE system at LAS-INPE o
Publicado em: 2007
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11. Ligas magnéticas NiFe e NiFeCo eletrodepositadas, voltadas para aplicações em micro-sensores magnéticos tipo fluxgate planar / Electrodeposited NiFe and NiFeCo films for planar fluxgate sensors
This work presents the results about the fabrication and characterization of thin films of NiFe and NiFeCo alloys. The attempts to construct the planar fluxgate are also presented. Galvanostatic electrodeposition using an electrolytic solution containing Ni and Fe was used: NiSO4 (0,7 mol/l); NiCl2 (0,02 mol/l); FeSO4 (0,03 mol/l); H3BO3 (0,4 mol/l) and C7H5
Publicado em: 2007
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12. Geoambientes, pedogênese e uso da terra no setor norte do Parque Nacional da Serra do Divisor, Acre / Geo-environments, pedogenesis and land use in north sector of the National Park of Serra do Divisor
The Serra do Divisor National Park , in the Upper Jurua River, west of the State of Acre, with 784.077 hectares, is covered by primary forest vegetation, with high biodiversity. In this study, we caracterized and mapped the geoenvironmental units and the land use of the northern sector of the Park (319.373 ha), and we also studied the pedogenetics aspects of
Publicado em: 2007