WorldWideScience

Sample records for aplicacao em celulas

  1. Hybrid membranes PVA/silicon for use in fuel cells; Membranas hibridas de PVA/silica para aplicacao em celula a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, Liz C.V. de; Almeida, Raquel D. de; Gomes, Ailton de S. [Universidade Federal do Rio de Janeiro - UFRJ, Instituto de Macromoleculas Professora Eloisa Mano - IMA, RJ (Brazil)], e-mail: lizcontino@ima.ufrj.br; Ramos Filho, Florencio G. de [Centro Universitario Estadual da Zona Oeste - UEZO, Rio de Janeiro, RJ (Brazil)

    2011-07-01

    Hybrids organic-inorganic membranes PVA-silica have been prepared using sol-gel process in situ with the objective of study the influence of inorganic particles incorporation on the water uptake, pervaporation and proton conductivity of PVA membranes. The silica was constituted of mercaptopropyltrimethoxysilane (MPTMS) with or without the mixture with the tetra ethoxysilane (TEOS). The hybrids membranes were oxidated to convert the -SH groups in -SO{sub 3}H groups, becoming them proton conducting. The hybrids membranes not oxidated showed lesser water uptake and pervaporated material, probably, due to the formation of crosslink that restricted the swell of the PVA membrane. The protonic conductivity of the hybrid membranes after the oxidation was up to 26 times bigger than of the membrane not oxidated. (author)

  2. Polyester synthesis for application in PEMFC type fuel cells; Sintese de poliester para aplicacao em celulas a combustivel do tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Fiuza, R.P.; Souza, D.R. de; Fiuza, R.A.; Jose, N.M.; Boaventura, J.S. [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Quimica], e-mail: raigenis@gmail.com

    2006-07-01

    The PEMFC (Proton Exchange Membrane Fuel Cell), along the SOFC (Solid Oxide Fuel Cell), is the most important technology, among the various types of fuels cell. The PEMFC shows a large versatility of applications, both for stationary and mobile use. However the PEMFC presents high manufacture cost, directly impacting in the cost of the produced energy. This work contemplates the previews sulfonation of phtalic acid and its subsequent polymerization with glycerol, using as catalytic tin dibutyl-dilaurate. The obtained material has been characterized by DSC, TGA, FTIR, MEV, DRX and XRF. The gotten results indicated that phtalic acid was sulfonated and the increase of the sulfonation degree significantly increased the crystallinity of the sulfonated ftalico acid. Furthermore, the polymer produced from the sulfonated monomer presented adequate thermal resistance and a high content of conducting groups, necessary conditions for application as electrolyte in PEMFC. All these characteristics, particularly the low cost of the reagents and the ease of production process, make the sulfonated polyester membrane a promising candidate as fuel cell electrolyte. (author)

  3. Celulas solares e sensores de filme fino de silicio depositados sobre substratos flexiveis =

    Science.gov (United States)

    Pinto, Emilio Sergio Marins Vieira

    Celulas solares flexiveis de filmes finos de silicio sao geralmente fabricadas a baixa temperatura sobre substratos de plastico ou a mais elevadas temperaturas sobre folhas de aco. Esta tese reporta o estudo da deposicao de filmes finos sobre diferentes substratos de plastico, transparentes e coloridos, para celulas solares do tipo sobrestrato e substrato, respectivamente. Como objetivo co-lateral, os filmes dopados depositados sobre plastico foram usados como sensores de deformacao, utilizando as suas propriedades piezo-resistivas. Elevadas taxas de deposicao dos filmes de silicio depositados sobre plastico foram obtidas a baixa temperatura do substrato (150ºC) por rf-PECVD. A influencia de diferentes parametros de deposicao sobre as propriedades e taxa de deposicao dos filmes resultantes foram estudados e correlacionados. Celulas solares de filmes finos de silicio amorfo e microcristalino foram desenvolvidas a baixas temperaturas sobre plasticos. Eficiencias de 5 – 6.5% foram alcancadas para as celulas amorfas e 7.5% para as celulas microcristalinas. Efeitos de aprisionamento da luz foram estudados atraves da texturizacao por ablacao laser de substratos de plastico e corrosao umida de TCO sobre plastico. Filmes finos de silicio microcristalino, depositados por HW-CVD, com fator piezoresistivo de -32.2, foram usados para fabricar sensores de deformacao em uma membrana plastica muito fina (15 μm). Estruturas de teste em textil e a miniaturizacao dos sensores piezoresistivos depositados sobre substratos flexiveis de poliimida foram abordados.

  4. Synthesis and characterization of sulfonic acid membranes based on interpenetrating polymer networks for application in fuel cells; Sintese e caracterizacao de membranas sulfonadas baseadas em redes polimericas interpenetrantes para aplicacao em celulas a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Blanco, Lyzed Toloza; Loureiro, Felipe A.M.; Rocco, Ana Maria [Grupo de Materiais Condutores e Energia, Escola de Quimica, Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil)], e-mail: amrocco@eq.ufrj.br; Pereira, Robson Pacheco [Instituto de Ciencias Exatas, Universidade Federal Fluminense (UFF), Volta Redonda, RJ (Brazil)

    2011-07-01

    In the present work, the synthesis and characterization of sulfonic membranes based on interpenetrating polymer networks (IPN). In order to obtain such systems, the diglycidyl ether of bisphenol A (DGEBA) was polymerized in presence of polyethyleneimine (PEI). These membranes were submitted to sulfonation reactions, originating IPN-SO{sub 3}H membranes. The characterization by FTIR evidenced the formation of a Semi-IPN structure, while sulfonation reactions resulted in systems containing -SO{sub 3}H groups covalently bonded to the chains. The membranes exhibited water retention up to 200 degree C, in a temperature range sufficient for application in PEMFC under hydration. (author)

  5. Preparation, characterization and evaluation of electrocatalysts supported on functionalized carbon black for polymer exchange membrane fuel cell applications; Preparacao, caracterizacao e avaliacao de eletrocatalisadores suportados em carbono funcionalizado para aplicacao em celulas a combustivel tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Carmo, Marcelo do

    2008-12-18

    The fuel cell technology associated with the growing exigency of low environmental impact energy became prosperous in the world energy scenery. The fuel cell is basically a device that converts directly the chemical energy of a fuel into electrical and thermal energy with a continuous operation by the constant feed of a fuel. Especially, the carbon black Vulcan XC72 is usually employed as an electro catalyst support, and some factors as an accessible and high surface area in order to get maximum particles dispersion, pore size, adequate pore distribution and the presence of functional groups in the carbon black surface are considered fundamental characteristics for an innovative materials development. However, the Vulcan XC72 still reveals insufficient conditions for these purposes. This study consists in the preparation and in the physical chemical characterization of functionalized carbon black by hydrogen peroxide and by polymeric chains with proton conduction properties, and its posterior utilization as electro catalyst support for PEMFC and DMFC application. After the carbon functionalization, an improvement in the carbon black dispersion in water media was observed, a beneficial effect for electro catalyst preparation. It was also observed, that the functional groups and the polymeric chains worked as stabilizers in the particle growing, producing much more homogeneous electrocatalysts, exhibiting smaller average particle size. Especially, in the case of polymeric chains functionalization, a decrease in the ohmic drop was observed for this system, attributed to an improvement in the proton transference. (author)

  6. Microstructural development and characterization of lanthanum chromite-based ceramics to application in solid oxide fuel cells; Desenvolvimento microestrutural e caracterizacao de ceramicas a base de cromita de lantanio para aplicacao em celulas a combustivel de oxido solido

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, R.N.; Furtado, J.G. de M.; Soares, C.M.; Serra, E.T. [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil)], e-mail: rnunes@cepel.br

    2006-07-01

    This work has for objective to investigate and to characterize the microstructural development of lanthanum chromite-based ceramics (LaCrO{sub 3}) doped with earth alkaline metals, correlating the microstructural parameters (mainly the densification level) and processing parameters with the electrothermal properties reached. Lanthanum chromite-based ceramic systems doped with earth-alkaline metals (Ca, Mg and Sr) had been produced from respective metallic nitrates by solid state reactions process. The phase compositions were evaluated by X-ray diffraction and the densification level by Archimedes method. The microstructural characterization was effected by scanning electron microscopy, energy dispersive X-ray spectroscopy and thermal analysis techniques. Electrical tests were used to evaluate the electrical conductivity of the studied ceramics. The obtained results corroborate the literature comments concerning the difficulty of lanthanum chromite-based ceramics with high densification level and evidence the great influence of the nature of the dopants on the sintering mechanism and the microstructural and electric characteristics of the produced ceramics. The best ones results, in terms of densification and electrical conductivity, had been gotten through multiple doping with calcium and strontium, and in sintering temperature conditions lower that the normally considered to pure or monodoped lanthanum chromite-based ceramics. (author)

  7. Synthesis and characterization of Pt-Sn-Ni alloys to application as catalysts for direct ethanol fuel cells; Sintese e caracterizacao de ligas de Pt-Sn-Ni para aplicacao como caztalisadores em celulas a combustivel do tipo DEFC

    Energy Technology Data Exchange (ETDEWEB)

    Silva, E.L. da; Correa, P.S.; Oliveira, E.L. de; Takimi, A.S.; Malfatti, C.F., E-mail: celia.malfatti@ufrgs.b [Universidade Federal do Rio Grande do Sul (LAPEC/UFRGS), Porto Alegre, RS (Brazil). Programa de Pos-Graduacao em Engenharia Mecanica. Lab. de Pesquisa em Corrosao; Radtke, C. [Universidade Federal do Rio Grande do Sul (IQ/UFRGS), Porto Alegre, RS (Brazil). Inst. de Quimica

    2010-07-01

    Direct ethanol fuel cells (DEFCs) have been the focus of recent research due its application in mobile energy sources. In order to obtain the maximum efficiency from these systems, it is necessary the total ethanol oxidation, which implies in C-C bond break. Different catalysts described in literature are employed with this intent. This work consists in studying PtSnNi catalysts supported on carbon Vulcan XC72R, to application in DEFCs. Thus, it was used the impregnation/reduction method, varying the atomic proportion among Pt, Sn and Ni. The alloys were characterized by X-Ray Diffraction, Cyclic Voltammetry and Transmission Microscopy. Preliminary results show that predominant structure on the catalysts is the face centered cubic platinum and the densities currents are dependent on the platinum amount. (author)

  8. Synthesis and ceramic processing of zirconia alumina composites for application as solid oxide fuel cell electrolytes; Sintese e processamento de compositos de zirconia-alumina para aplicacao como eletrolito em celulas a combustivel de oxido solido

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, Rafael Henrique Lazzari

    2007-07-01

    The global warmness and the necessity to obtain clean energy from alternative methods than petroleum raises the importance of developing cleaner and more efficient systems of energy generation, among then, the solid oxide fuel cell (SOFC). Cubic stabilized zirconia (CSZ) has been the most studied material as electrolyte in SOFC, due to its ionic conductivity and great stability at operation conditions. However, its low fracture toughness difficulties its application as a thin layer, what could lead to an improvement of cell efficiency. In this sense, the alumina addition in CSZ forms a composite, which can shift its mechanical properties, without compromising its electrical properties. In this work, coprecipitation synthesis route and ceramic processing of zirconia-alumina composites were studied, in order to establish optimum conditions to attain high density, homogeneous microstructure, and better mechanical properties than CSZ, without compromising ionic conductivity. For this purpose, composites containing up to 40 wt % of alumina, in a 9 mol % yttria-stabilized zirconia (9Y-CSZ) matrix were evaluated. In order to optimize the synthesis of the composites, a preliminary study of powder obtaining and processing were carried out, at compositions containing 20 wt % of alumina, in 9Y-CSZ. The ceramic powders were characterized by helium picnometry, X-ray diffraction, scanning electronic microscopy, transmission electronic microscopy, thermogravimetry, differential scanning calorimetry, granulometry by laser diffraction and gas adsorption (BET). The characterization of sinterized compacts were performed by X-ray diffraction, scanning electron microscopy, optical microscopy, density measurements, Vickers indentation and impedance spectroscopy. The obtained results show that the alumina addition, in the 9Y-CSZ matrix powders, raises the specific surface area, promotes deagglomeration of powders and elevates the oxides crystallization temperature, requiring higher energetic thermal treatments to attain high densities. In relation to the sintered products, it was confirmed the excellent homogeneity and crystallinity of microstructure provided by the chosen route, the restriction of grain growth by alumina addition, raise of hardness and fracture toughness, and higher ionic conductivity, even tough a lower bulk conductivity. These results indicate that the addition of 5 wt % alumina in CSZ matrix allows the application of this material as solid oxide fuel cell electrolytes, due to its better fracture toughness and ionic conductivity, compared to yttria-stabilized cubic zirconia ceramics. (author)

  9. Polymeric membranes obtained from S-PEEK for application in PEM fuel cells; Caracterizacao de membranas polimericas obtidas a partir dos S-PEEK para aplicacao em celulas combustiveis do tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, Ednardo G.; Fiuza, Raildo A.; Catao, Ronei S.; Jose, Nadia M.; Boaventura, Jaime S. [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Quimica], e-mail: ednardobarreto@yahoo.com.br, e-mail: raildofiuza@gmail.com, e-mail: roneicatao@ig.com.br, e-mail: nadia@ufba.br, e-mail: bventura@ufba.br; Pepe, Yuri [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Fisica

    2007-07-01

    This work had the objective to develop and to characterize S-PEEK membranes (sulfonated poly ether ether ketone) through chemical and electrochemical analyses. Conductivity test in function of the frequency and tension had been carried through; as well as, the open circuit tension of a fuel cell using the S-PEEK as electrolyte. Additional tests included TGA (Thermogravimetric Analysis), water absorption test, DSC (Differential Scanning Calorimetry), as tools to characterize conducting, thermal and mechanical proprieties of polymeric membrane. (author)

  10. Preparation of gas diffusion layers for PEMFC fuel cells using carbon fibers; Elaboracao de uma camada de difusao de gas a partir de fibras de carbono para aplicacao em celulas combustiveis do tipo PEMFC

    Energy Technology Data Exchange (ETDEWEB)

    Santos, J.N.; Kunsti, S.R.; Malfatti, C.F. [Universidade Federal do Rio Grande do Sul - Departamento de Metalurgia (PPGEM) - Laboratorio de Pesquisa em Corrosao (LAPEC), Porto Alegre, RS (Brazil); Vargas, J.V.C. [Universidade Federal do Parana - Departamento de Engenharia Mecanica, PR (Brazil); Amico, S.C. [Universidade Federal do Rio Grande do Sul - Departamento de Materiais, RS (Brazil)

    2010-07-01

    The electrode/membrane system, called MEA, is the fundamental unit of a PEMFC (proton exchange membrane fuel cell). Within the MEA, the gas diffusion layer (GDL) is the bridge between the flow field and the catalyst layer. One of the important elements in a GDL is the substrate, typically a carbon cloth or paper, that has to be an excellent electrical conductor and show mechanical strength along with thermal and chemical stability. In this work, GDLs were produced from a suspension containing short carbon fibers in water-based polyurethane and poly(vinyl alcohol) (PVA) resins with appropriate characteristics to be used in low temperature fuel cells. The obtained GDL was characterized regarding its wettability, electrical conductivity and morphological aspects, evaluated by SEM. (author)

  11. Cooperative research and the carbon fiber development for application in uranium centrifuges project; Pesquisa cooperativa e o desenvolvimento de fibra de carbono para aplicacao em ultracentrifugas nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Queiroz, Paulo Cesar Beltrao [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), Sao Paulo, SP (Brazil)], e-mail: paulocbqueiroz@gmail.com; Zouain, Desiree Moraes [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: dmzouain@ipen.br

    2009-08-15

    This paper analyzes both the carbon fiber-based development for uranium centrifuges and the research project that supports its development effort over time. The carbon fibre-based engineering properties make it a valuable supply for high technological products, such as uranium ultracentrifuge. There is no production of such fibers in Brazil. Its trade is subject to international market restrictions due to carbon fibers' dual applications. The Centro Tecnologico da Marinha em Sao Paulo (CTMSP), the Universidade de Campinas (UNICAMP), the Universidade de Sao Paulo (USP), the RADICIFIBRAS Company, and the Financiadora de Estudos e Projetos (FINEP), which is responsible for the project financial support, established a partnership aiming the development of a domestic polyacrylonitrile (Pan)-based carbon fiber industry. Such alliances or technological partnerships are best known in developed countries, such as USA and Japan, as Cooperative Research or Research Joint Ventures (RJV). (author)

  12. The Marine Magnetotelluric Method (MMT) applied of hydrocarbons exploration in Brazilian waters; Aplicacao do Metodo Magnetotelurico Marinho (MMT) na exploracao de hidrocarbonetos em aguas brasileiras

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Vinicius R.; Flexor, Jean M.; La Terra, Emanuele F.; Fontes, Sergio L. [Observatorio Nacional do Brasil, Rio de Janeiro, RJ (Brazil); Lugao, Patricia P. [Schlumberger, Rio de Janeiro, RJ (Brazil). Western-Geco

    2008-07-01

    Magnetotellurics (MT) is a natural-source, electromagnetic geophysical method of imaging structures below the earth's surface. It is used to map the subsurface Earth's resistivity by measuring the naturally occurring electric and magnetic fields at the Earth's surface. These natural EM fields are generated in the Earth's atmosphere mainly by lightning strokes and by interactions between the solar wind and the ionosphere. Natural variations in the earth's magnetic field induce electric currents (or telluric currents) under the earth's surface. Concurrent measurements of orthogonal components of the electric and magnetic fields allow for the calculation of the impedance tensor, which is complex and frequency-dependent and from which it is possible to gain insight into the resistivity structure of the surrounding material. The marine magnetotelluric method (MMT) is the application of MT method to investigate the sea-floor resistivity's distribution. A MMT sounding with 96 stations was realized in the region of Santos Basin on a subsalt section to assist the interpretation of seismic data in order to estimate the depth of base of the salt (subsalt) since this imaging in general is problematic. The high contrast of the electrical resistivity between the salt and the surrounding sediments is an excellent objective and it constitutes a great opportunity to test the applicability of the MMT method in oil exploration studies. The geological interpretation of the seismic profile of the studied area shows the existence of several bodies of salt with depths of the base that could vary more from 7000 m to more than 9000 m. The top of the body of more important salt of the profile begins to the 3500 m and your base is not solved by the seismic sign that it reaches a maximum depth of 9000 m. The MMT data of the central profile were submitted an inversion procedure - 2D by using the non linear conjugate gradients that produces smooth models for

  13. Novos substratos do receptor de insulina : regulação da proteina SHC em modelos animais de resistencia a insulina e do IRS-3 em celulas beta pancreaticas

    OpenAIRE

    Enma Veronica Paez-Espinosa

    2000-01-01

    Resumo: A insulina inicia seus efeitos metabólicos e promotores de crescimento através da ligação à subunidade a do seu receptor. Esta ligação promove a fosforilação em tirosina da subunidade _, e dá inicio a uma cascada de eventos intracelulares, mediante a fosforilação de vários substratos endógenos. Entre os primeiros substratos ativados estão o substrato 1 do receptor de insulina, e uma nova proteína, possuidora .do domínio SH2, cuja estrutura lembra àquela do colágeno (Src homology), den...

  14. Application of PtSn/C catalysts and Nafion SiO{sub 2} membranes in direct ethanol fuel cell at high temperatures; Aplicacao de catalisadores PtSn/C e membranas Nafion SiO{sub 2} em celulas a combustivel de etanol direto em elevadas temperaturas

    Energy Technology Data Exchange (ETDEWEB)

    Dresch, Mauro Andre

    2014-07-01

    This work has as objective to evaluate anodes and electrolytes in direct ethanol fuel cells (DEFC) operating at high temperature (130 deg C). As anode materials, electrocatalysts based on Pt Sn/C were prepared by Modified Polyol Method with various Pt:Sn atomic ratios. Such methodology promotes self organized electrocatalysts production with narrow particle size distribution and high alloying degree. The electrocatalysts were characterized by XRD, and CO stripping. The results showed that these materials presented high alloying degree and Eonset CO oxidation at lower potential as commercial materials. As electrolyte, Nafion-SiO{sub 2} hybrids were synthesized by sol-gel reaction, by the incorporation of oxide directly into the ionic aggregates of various kinds of Nafion membranes. The synthesis parameter, such sol-gel solvent, membrane thickness and silicon precursor concentration were studied in terms of silica incorporation degree and hybrid mechanical stability. Finally, the optimized anodes and electrolytes were evaluated in DEFC operating at 80 - 130 deg C temperature range. The results showed a significant improvement of the DEFC performance (122 mW cm{sup -2}), resulted from the acceleration of ethanol oxidation reaction rate due to anode material optimization and high temperature operation once the use of hybrids possibilities the increase of temperature without a significant conductivity loses. In this sense, the combination of optimized electrodes and electrolytes are a promising alternative for the development of these devices. (author)

  15. Cultivo de celulas de Drosophila melanogaster em diferentes formulações de meios de cultura livres de soro visando a produção da glicoproteina do virus da raiva

    OpenAIRE

    Adriana Lages Lima Galesi

    2007-01-01

    Resumo: Células de inseto têm sido freqüentemente empregadas na obtenção de proteínas recombinantes devido a algumas vantagens em relação às células de mamíferos, e a linhagem Drosophila melanogaster Schneider 2 é um dos sistemas de expressão utilizados para este propósito. Entretanto, a literatura é escassa em relação ao metabolismo e ao cultivo destas células, o que motivou o desenvolvimento deste trabalho. O objetivo deste estudo foi determinar, através da técnica estatística de planejamen...

  16. Study of the oxygen reduction reaction using Pt-Rare earths (La, Ce, Er) electrocatalysts for application of PEM fuel cells; Estudo da reacao de reducao do oxigenio utilizando eletrocatalisadores a base de Pt-terras raras (La, Ce, Er) para aplicacao em celulas a combustivel tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Thiago Bueno

    2013-07-01

    The complexity of the oxygen reduction reaction (ORR) and its potential losses make it responsible for the most part of efficiency losses at the Fuel Cells. For this reaction the electrocatalyst witch is most appropriated and shows better performance is platinum, a noble metal that elevates the cost, raising barriers for Fuel Cells technology to enter the market. First this work focuses on reducing the amount of platinum used in the cathode, by being replaced by rare earths. The most common methods of synthesis involves a large amount of steps and this work proposed to prepare the electrocatalyst through a simpler way that would not take so many steps and time to be done. Using an ultrasound mixer the electrocatalyst was prepared mixing platinum supported on carbon black and the rare earths lanthanum, cerium and erbium oxides to be applied in a half-cell study of the ORR. The Koutecky-Levich plots shows that among the electrocatalysts prepared the Pt80Ce20/C had the catalytic activity close to the commercial BASF platinum on carbon black, suggesting that the reaction was taken by the 4-electron path. As found in some works in literature, among the rare earth used to study the ORR, cerium is the one witch shows the better performance because it is able to store and provide oxygen. This feature is of great interest for the ORR because this reaction is first order to the oxygen concentration. Results show that is possible to reduce the amount of platinum maintaining the same electrocatalyst activity. (author)

  17. Evaluation and application of PEMFC fuel cell's technologies developed at IPEN applied to a 500 W{sub e} fuel cell stack; Avaliacao e aplicacao de tecnologias de celulas a combustivel tipo PEMFC desenvolvida no IPEN em um modulo de 500 W{sub e} de potencia nominal

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, Edgar Ferrari da

    2009-07-01

    This work is part of a research project on PEMFC technologies carried out in IPEN to develop and optimize a 500 W{sub e} fuel cell stack. The MEAs scaling up from 25 cm{sup 2} to 144 cm{sup 2} produced by the method of sieve printing; computational fluid dynamics by computer simulation of gas flow channels in bipolar plates using COMSOL{sup R} program and the use of Pt/C electrodes developed by alcohol reduction method in single cells were used to build a stack of 500 W{sub e} nominal power for possible commercial applications, produced with national technology and industrial support. A 100 hours fuel cell's test was carried out in a 144 cm{sup 2} single cell to study the stability of the MEA fabricated by sieve printing method. This single cell showed good stability within this period of time. The developed stack has reached the maximum power of 574 W{sub e} at 100 A (694.4 mA cm{sup -2}). The operating power of 500 W{sub e} was obtained at 77.7 A (540.1 mA cm{sup -2}) and potential of 6.43 V, with efficiency of 43.3%. In terms of cogeneration, the thermal power or generated heat by the stack was 652 W{sub t}. The initial estimated cost for the 500 W{sub e} stack was about R$ 4,500.00, considering only the used materials for its construction. (author)

  18. Preparation and characterization of PVA/SSA membranes with Al{sub 2}O{sub 3} nanoparticles for fuel cell applications; Preparacao de caracterizacao de membranas de PVAL/SSA na presenca de nanoparticulas de Al{sub 2}O{sub 3} para aplicacao em celulas de combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Paula N.; Pires, Alfredo T.N. [Grupo de Estudo em Materiais Polimericos - POLIMAT - UFSC, Florianopolis, SC (Brazil); Catarino, Margarida; Brandao, Lucia; Tanaka, Alfredo; Mendes, Adelio [Faculdade de Engenharia da Universidade do Porto, Porto (Portugal)

    2011-07-01

    In the present study, PVA/SSA membranes were prepared with and without the addition of Al{sub 2}O{sub 3} nanoparticles. Sulfosuccinic acid (SSA) was used as the crosslinking agent. Membranes were prepared with different amounts of SSA (26, 43 and 55 wt.%) and with 5 and 10 wt.% of nanoparticles. Crosslinking was performed at 90 degree C during 1.5 h. Membranes were analyzed by infrared spectroscopy, thermal analysis, water absorption, ion exchange capacity (IEC) and proton conductivity. The results showed that control of the crosslinking conditions, IEC value, water absorption and polymer structure are of significant importance to obtain a set of properties suitable for application in proton exchange membrane fuel cells. (author)

  19. Preparation and characterization of Nafion - TiO{sub 2} composite electrolytes for application in proton exchange membrane fuel cells; Preparacao e caracterizacao de eletrolitos compositos Nafion - TiO{sub 2} para aplicacao em celulas a combustivel de membrana de troca protonica

    Energy Technology Data Exchange (ETDEWEB)

    Matos, Bruno Ribeiro de

    2008-11-06

    The fabrication and characterization of Nafion - TiO{sub 2} composites, and the use of such electrolytes in PEM (Proton Exchange Membrane) fuel cell operating at high temperature (130 deg C) were studied. The operation of a PEM fuel cell at such high temperature is considered as an effective way to promote fast electrode reaction kinetics, high diffusional transport, and high tolerance to the carbon monoxide fuel contaminant. The polymer Nafion{sup R} is the most used electrolyte in PEM fuel cells due to its high proton conductivity. However, the proton transport in Nafion is dependent on the water content in the polymeric membrane. The need of absorbed water in the polymer structure limits the operation of the fuel cell to temperatures close to 100 deg C, above which Nafion exhibits a fast decrease of the ionic conductivity. In order to increase the performance of the electrolyte operating at high temperatures, Nafion-TiO{sub 2} composites have been prepared by casting. The addition of titania hygroscopic particles to the polymeric matrix aims at the enhancement of the humidification of the electrolyte at temperatures above 100 deg C. Three types of titania particles with different specific surface area and morphology have been investigated. Nafion-based composites with the addition of titania nanoparticles, in the 2.5-15 wt.% range, with nearly spherical shape and specific surface area up to approx. 115 m{sup 2}g{sup -1} were found to have higher glass transition temperature than the polymer. Such an increase improves the stability of the electrolyte during the fuel cell operation at high temperatures. The addition of titania-derived nanotubes results in a pronounced increase of the performance of PEM fuel cell operating at 130 deg C. In this composite, the high specific surface area and the tubular shape of the inorganic phase are responsible for the measured increase of both the absorption and retention of water of the composite electrolyte. Nonetheless, the polarization curves of fuel cell using the composite electrolytes exhibited an increase of the ohmic polarization associated with the addition of the insulating titania particles. As the chemical structure of Nafion was observed to be insensitive to the addition of the inorganic particles, the high performance of the composite electrolytes is a result of competing effects: the decrease of the electrical conductivity and a higher thermal stability or water absorption/retention capacity. The experimental results suggest that the Nafion-TiO{sub 2} composites are promising electrolytes for PEM fuel cells operating at temperatures above approx. 100 deg C. (author)

  20. Characterization of cathode materials SrCoO3 and La0,2Sr0,8CoO3 for use in solid oxide fuel cells (SOFC); Caracterizacao de materiais catodicos SrCoO3 e La0,2Sr0,8CoO3 para aplicacao em celulas a combustivel de oxido solido (SOFC)

    Energy Technology Data Exchange (ETDEWEB)

    Galvao, G.O.; Aquino, F.M; Silva, R.M.; Medeiros, I.D.M. de, E-mail: gabriela.galvao@cear.ufpb.br [Universidade Federal da Paraiba (UFPB), Joao Pessoa, PB (Brazil)

    2016-07-01

    Mixed oxide ceramics with chemical structure of ABO{sub 3} type are promising candidates for cathodes of solid oxide fuel cells (SOFC) for performing well on the electrical conductivity and thermal stability. Various methods of preparation have been studied and used for the synthesis of these materials. In this study, SrCoO{sub 3} and La{sub 0,2}Sr{sub 0,8}CoO{sub 3} perovskites were synthesized using gelatin as directing agent with the purpose of producing homogeneous and porous particles. The powders obtained at 350 ° C / 2 h were calcined at 600, 800 and 1000 ° C for 4 hours and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that gelatin is a good polymerizing agent for metal ions as the material showed characteristic peaks of perovskite, with good porosity and uniformity. Furthermore, the method of synthesis employed has advantages related to cost and toxicity, which are very low. (author)

  1. Tratamento da Osteonecrose da Cabeça Femoral com celulas progenitoras autólogas em anemia falciforme Femoral Head Necrosis treatment with autologous stem cells in sickle cell disease

    Directory of Open Access Journals (Sweden)

    Gildásio Cerqueira Daltro

    2008-01-01

    Full Text Available OBJETIVO: Avaliação da segurança e eficácia do uso de células progenitoras autólogas da medula óssea (CMMO no tratamento da Osteonecrose da Cabeça Femoral (OCF de pacientes portadores de anemia falciforme. MÉTODOS: Foram estudados 8 pacientes portadores de anemia falciforme, com OCF nos estágios I e II (classificação de Ficat e Arlet. As CMMO retiradas da crista ilíaca posterior foram concentradas e reinfundidas na área central da osteonecrose. Os principais parâmetros avaliados foram segurança, sintomas clínicos e progressão da doença, através da avaliação clínica (Harris Hip Score e radiológica. RESULTADOS: A maior parte dos pacientes (7 em 8 referiu melhora dos sintomas após o tratamento. Não houve complicações durante o procedimento anestésico e cirúrgico. A medida do escore (Harris Hip Score no pré-operatório foi 78,5 +/- 6,2 pontos, com aumento significativo destes valores no pós-operatório (98,3 +/- 2,5 pontos (pPURPOSE: To assess the efficacy and safety of autologous bone-marrow mononuclear cells (BMMC implantation in necrotic lesions of the femoral head in patients with sickle cell disease. METHODS: We studied eight patients with stage-I or -II femoral head osteonecrosis according to the system by Ficat and Arlet. BMMCs were harvested and re-infused into the necrotic zone. The primary endpoints studied were safety, clinical symptoms and disease progression, these being assessed according to the Harris hip score (HHS and to X-ray studies. RESULTS: After eight months, seven of the eight patients reported improvement from symptoms. There were no complications during anesthetic and surgery procedures. There was a significant postoperative increase in the HHS (98.3 +/- 2.5 points compared to preoperative HHS (78.5 +/- 6.2 points (p< 0.001. X-ray evaluation and cell parameters were found to be favorable. CONCLUSION: The autologous bone-marrow mononuclear cells implantation seems to be a safe and effective

  2. Desempenho de diferentes revestimentos em brochas de aço rapido

    OpenAIRE

    Sergio Henrique Andrade

    2009-01-01

    Resumo: O aco rapido e um material que apresenta elevada resistencia ao desgaste e elevada dureza a quente, tendo grande aplicacao na construcao de ferramentas de dimensoes e formas complexas, tais como brochas. O presente trabalho avaliou a utilizacao de coberturas de materiais mais resistentes ao desgaste em brochas de aco rapido no brochamento interno de perfil, utilizando como corpo de prova o componente do conjunto de disco de embreagem denominado cubo de embreagem, fabric...

  3. Utilização de biomarcadores genéticos na avaliação aguda do efeito mutagênico dos contaminantes atrazina e cloreto de cobre em Rhamdia quelen (Siluriformes, Heptapteridae)

    OpenAIRE

    Piancini, Laercio Dante Stein

    2011-01-01

    Resumo: A maioria dos recursos biologicos da Terra estao localizados em ambientes costeiros e nos grandes sistemas de bacias fluviais. No entanto, mais de 3 bilhoes de pessoas vivem em estreita proximidade desses locais. Como consequencia dessa situacao, grande parte dos residuos gerados, tanto industriais como domesticos, ocorrem nessas areas. A atrazina e utilizada desde os anos 50, sendo desde entao um dos herbicidas mais utilizados no mundo, com estimativas de aplicacao entre 70.000 e 90....

  4. Synthesis and characterization of La{sub 1-x}Sr{sub x}MnO{sub 3} (x=0,1) for cathode application in solid oxide fuel cells (SOFC); Sintese e caracterizacao de La{sub 1-x}Sr{sub x}MnO{sub 3} (x=0,1) visando sua aplicacao como catodo em celulas a combustivel de oxido solido (SOFC)

    Energy Technology Data Exchange (ETDEWEB)

    Tarrago, D.P.; Sousa, V.C., E-mail: dptarrago@gmail.co [Universidade Federal do Rio Grande do Sul (LABIOMAT/PPGEM/UFRGS), Porto Alegre, RS (Brazil). Programa de Pos graduacao em Engenharia de Minas. Lab. de Biomateriais; Malfatti, C.F. [Universidade Federal do Rio Grande do Sul (LAPEC/PPGEM/UFRGS), Porto Alegre, RS (Brazil). Programa de Pos graduacao em Engenharia de Minas. Lab. de Pesquisa em Corrosao

    2010-07-01

    Perovskite powders, with composition La{sub 1-x}Sr{sub x}MnO{sub 3} (x=0,1) were obtained via combustion synthesis using sucrose as fuel. In the X-ray diffraction patterns it was observed that in order to obtain a single phase and well crystallized material a calcination in 750 deg C for 3 hours was necessary. BET analysis detected a specific surface area of 45m{sup 2}/g, considerably higher than when obtained with other fuels. SEM micrographs revealed a spongy aspect with a connected porosity in the agglomerates and though TEM micrographs the presence of pores in the particles was verified. The powder compacted with 125MPa and sintered at 1050 deg C for two hours presented a 31% open porosity and the SEM micrographs showed a fine interconnected porosity. (author)

  5. Feasibility of biogas utilization in fuel cells; Viabilidade do uso de biogas em celulas a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Sprenger, Humberto Elias [Programa de Pos-graduacao em Desenvolvimento de Tecnologia (PRODETEC/LACTEC/IEP), Cutitiba, PR (Brazil); Cantao, Mauricio Pereira [Instituto de Tecnologia para o Desenvolvimento (LACTEC), Curitiba, PR (Brazil)], E-mail: mauricio.cantao@utp.br

    2010-10-15

    Waste water treatment stations using upflow anaerobic sludge blanket (UASB) produce biogas, composed of carbon dioxide diluted methane plus minority compounds. This kind of reactor is worthwhile but demands methane burning in order to reduce atmospheric pollution and damage to ozone layer. Meanwhile, biogas can be used for energy generation due to its heating value. In this paper a technical and economic feasibility study about the use of biogas as a hydrogen source for fuel cells feeding is presented. Two methods for assessment of biogas production in UASB reactor were compared for ETE Atuba Sul case. (author)

  6. Microstructural characterization of composite cobaltite and lanthanum-based ceria for use as fuel cell cathodes; Caracterizacao microestrutural de compositos a base de cobaltita de lantanio e ceria para aplicacao como catodos de celulas a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, E.R.T.; Nascimento, R.M.; Miranda, A.C. de; Lima, A.M. de, E-mail: erickssonrtr@gmail.com [Universidade Federal do Rio Grande do Norte (UFRN), RN (Brazil); Macedo, D.A. [Universidade Federal da Paraiba (UFPB), PB (brazil)

    2016-07-01

    Fuel cells are devices that convert chemical energy into electricity via redox reactions. In this work, the lanthanum cobaltite doped with strontium and iron (La{sub 0,6}Sr{sub 0,4}Co{sub 0,2}Fe{sub 0,8}O{sub 3} - LSCF) a traditional cathodes material of the fuel cell was mixed with an electrolyte material (composite) to the base ceria doped with gadolinia and a eutectic mixture of lithium carbonates and sodium (CGO-NLC). The powders of LSCF and CGO-NLC were obtained by the citrate method and mixed to obtain a composite cathode. Samples obtained by uniaxial pressure between 5 and 10 MPa were sintered at 1100°C and investigated by X-ray diffraction, scanning electron microscopy and micro hardness test. A symmetric cell cathode / electrolyte / cathode, obtained by co-pressing and co-sintering was investigated by electron microscopy. The results indicated that the composite is chemically stable up to the sintering temperature used. The hardness ranged between 51 and 227 HV. (author)

  7. Application of cyclodextrins in textile processes;Aplicacao de ciclodextrinas em processos texteis

    Energy Technology Data Exchange (ETDEWEB)

    Andreaus, Juergen; Dalmolin, Mara C.; Oliveira Junior, Iguatemy B. de; Barcellos, Ivonete O., E-mail: jandr@furb.b [Universidade Regional de Blumenau, SC (Brazil). Dept. de Quimica

    2010-07-01

    Cyclodextrins (CDs) are water soluble cyclic sugars with a hydrophobic nanometric cavity that permits the formation of host/guest inclusion complexes with a large variety of molecules, alternating their physical-chemical properties. In the present review CD research related to the processing of textiles is revised and discussed. CDs may function as encapsulating, dispersing and levelling agents in the dyeing and washing of textiles. Furthermore they may be anchored to polymers and textile fibers in order to impart special properties such as odor reduction, UV protection or for the controlled release of perfumes, aromas, mosquito repellents or substances with therapeutical effects. (author)

  8. Mechanized covering application in equipment surfaces; Aplicacao mecanizada de revestimento em superficies de equipamentos

    Energy Technology Data Exchange (ETDEWEB)

    Abreu, Billy A. de; Broering, Carlos E. [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica

    2004-07-01

    Facing such challenges, the main objective of this work is to develop automated equipment and new welding procedures to be used to repair tank reservoirs operating in corrosive media. The equipment is expected to be applied directly in the maintenance of petrochemical plants. The project consists on a mechanical displacement device, able to move along a flexible rail, which can be fixed to a concave or convex surface and fitting itself to the geometry. A transversal arm gives it a second movement ability, allowing oscillatory displacements and the exact positioning of the pistol. As it is widely known, the automated welding process results in a considerably increase in productivity and quality, when comparing to the hand made process. Therefore, knowing the parameters involved and adjusted the welding variables to the best values, it is expected to achieve welding free of imperfections, inconsistencies and errors, and able to be repetitive. (author)

  9. Custo de capital próprio em mercados emergentes: uma abordagem empírica no Brasil com o downside risk

    Directory of Open Access Journals (Sweden)

    Graziela Xavier Fortunato

    2010-02-01

    Full Text Available Este artigo visa testar empiricamente a proposta de Estrada (2000 para as empresas que compoem o Ibovespa, avaliando se para mercados emergentes existem outras medidas de risco sistematico diferentes do beta do capital asset pricing model (CAPM. Dessa forma, testou-se o downside risk que capta a parte negativa do retorno. Alem de dados em cross section, utilizaram-se dados em painel, como uma contribuição adicional ao trabalho de Estrada (2000. Os resultados encontrados não confirmam que o downside risk seja uma medida apropriada ao mercado brasileiro. Outras medidas de risco apresentaram melhor correlacao com o retorno, permitindo o calculo do custo de capital com valor diferente daquele obtido pela aplicacao do beta. De acordo com Estrada (2000, os resultados sugerem que os mercados emergentes estao em posicao intermediaria entre os mercados integrados e segmentados, tal como confirmado para o mercado brasileiro.

  10. Biofunctionality and immunocompatibility of starch-based biomaterials

    Science.gov (United States)

    Marques, Alexandra Margarida Pinto

    A procura de novos biomateriais que desempenhem funcoes especificas sem, no entanto, desencadearem respostas negativas nos hospedeiros constitui um desafio permanente e actual nesta area. Biomateriais degradaveis foram uma das solucoes propostas e actualmente em aplicacao mas, embora possuam vantagens inegaveis, tambem apresentam alguns problemas nomeadamente no que diz respeito aos seus produtos de degradacao e respectivos efeitos negativos consequentes. Outros biomateriais, entre os quais polimeros de origem natural, foram propostos considerando que os seus produtos de degradacao poderao ser incorporados nas vias metabolicas normais evitando efeitos secundarios no hospedeiro. Ate ao momento, e apesar de todos os esforcos e do grande numero de dispositivos biomedicos desenvolvidos, o biomaterial ideal para uma aplicacao especifica ainda nao foi encontrado. Estudos com polimeros biodegradaveis a base de amido demonstraram que estes materiais possuem propriedades promissoras abrindo novas perspectivas para a sua possivel aplicacao numa variedade de aplicacoes biomedicas. Assim, de modo a demonstrar que estes materiais tem de facto potencial para serem utilizados em, por exemplo, substituicao ossea, sistemas de libertacao controlada, cimentos osseos e engenharia de tecidos, seria imperativo avaliar com maior profundidade a resposta biologica desencadeada pelos mesmos. Para tal foi delineado um plano de trabalhos com tres objectivos principais: i) avaliar a citocompatibilidade dos polimeros e compositos a base de amido com monitorizacao da citotoxicidade e analise da adesao e proliferacao celulares nas suas superficies. Foi dada particular atencao a osteoblastos considerando uma possivel aplicacao ortopedica para estes materiais; ii) estabelecer modelos in vitro para analisar e prever, tanto quanto possivel, uma situacao real de resposta inflamatoria; iii) validar os resultados in vitro com um modelo in vivo ja estabelecido em outros trabalhos de analise da resposta

  11. Energy assessment of nitrogen variable rate fertilization on wheat; Analise energetica da aplicacao de nitrogenio em taxa variavel em trigo

    Energy Technology Data Exchange (ETDEWEB)

    Colaco, A.F.; Karam, E.H.; Romanelli, T.L.; Molin, J.P. [Escola Superior de Agricultura Luiz Queiroz (ESALQ/USP), Piracicaba, SP (Brazil). Dept. de Engenharia de Biossistemas], Email: andrecolaco@usp.br; Povh, F.P. [Fundacao ABC Pesquisa e Desenvolvimento Agropecuario, Castro, PR (Brazil)

    2011-07-01

    Precision Agriculture (PA) is a technique that can reduce the inputs utilization in agriculture production, including the nitrogen fertilizer consume. Great importance is given to this fertilizer, due to its contribution on energy input in agriculture. Methodologies based on the calculation of energy flow of agriculture systems are capable to identify management practices that use energy more efficiently. So, this study's objective is to evaluate the variable-rate nitrogen fertilization on wheat, using energy assessment. This study was carried on in two wheat fields, in which the fertilization was done adopting strips alternated by conventional method (single nitrogen dose) and by nitrogen variable-rate technology. Thus, the input and output energy in the system, energy balance, energy return on investment (EROI) and incorporated energy were determined for each geo-referenced point within the fields. Results showed that less energy was demanded when using variable-rate technology, due to the nitrogen saving, providing greater energy balance, EROI and lower incorporated energy on the areas managed using PA. The energy assessment showed to be an important tool to evaluate systems that use PA, because it is capable of monitoring crops energy potential. (author)

  12. Studies of water electrolysis in polymeric membrane cells; Estudos de eletrolise aquosa em celulas de membrana polimerica

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira-Silva, M.A.; Linardi, M.; Saliba-Silva, A.M. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Centro de Celulas a Combustivel e Hidrogenio

    2010-07-01

    Hydrogen represents great opportunity to be a substitute for fossil fuels in the future. Water as a renewable source of hydrogen is of great interest, since it is abundant and can decompose, producing only pure H{sub 2} and O{sub 2}. This decomposition of water can be accomplished by processes such as electrolysis, thermal decomposition and thermochemical cycles. The membrane electrolysis has been proposed as a viable process for hydrogen production using thermal and electrical energy derived from nuclear energy or any renewable source like solar energy. In this work, within the context of optimization of the electrolysis process, it is intended to develop a mathematical model that can simulate and assist in parameterization of the electrolysis performed by polymer membrane electrolytic cell. The experimental process to produce hydrogen via the cell membrane, aims to optimize the amount of gas produced using renewable energy with non-carbogenic causing no harm by producing gases deleterious to the environment. (author)

  13. O modelo de pseudogestação em camundongos para o estudo 'in situ' das celulas Natural Killer uterinas

    OpenAIRE

    Juares Ednaldo Romero Bianco

    2006-01-01

    Resumo: Durante o período peri-implantacional na gestação de humanos e roedores, ocorre no estroma da mucosa uterina um conjunto de fenômenos que envolvem modificações dos componentes celulares e da matriz extracelular. Este conjunto de modificações é conhecido como decidualização ou reação decidual. Concomitante a este processo ocorre a migração de leucócitos provenientes de órgão hematopoéticos para este estroma. Dentre estes leucócitos predominam as subpopulações de linfócitos denominados ...

  14. Cell death induced by tamoxifen in human blood lymphocytes cultivated in vitro = Morte celular induzida pelo tamoxifeno em linfócitos humanos cultivados in vitro

    Directory of Open Access Journals (Sweden)

    Selma Candelária Genari

    2010-10-01

    Full Text Available Many chemotherapeutic agents with a potential against solid tumors or leukemia can cause lymphopenia. Tamoxifen (TAM is a synthetic non-steroidal anti-estrogen drug employed in female breast cancer treatment. The present study investigated the capacity of TAM to induce cell death in human lymphocytes cultivated in vitro. Lymphocytes were obtained from young (25-30 years; n = 3 and elderly women (58-77 years; n = 3 and cultivated for 24 or 48h, with or without TAM (20 ƒÊM. After the culture, cell viability, immunocytochemical response and ultrastructure were evaluated. TAM affected lymphocytes in a time- dependent manner, and cells obtained from elderly women were the most sensitive to TAM. Immunocytochemicalanalysis evidenced higher frequency of apoptosis in treated cells, and the ultrastructural study revealed autophagic vacuoles, differing from the controls. In summary, the treated lymphocytes were affected by TAM, leading to cell death by apoptosis and autophagy.Muitos agentes quimioterapicos com potencial contra tumores solidos ou leucemias podem causar linfopenia. O Tamoxifeno (TAM e um agente antiestrogeno nao-esteroidal empregado no tratamento de cancer de mama feminino. O presente trabalho investigou a capacidade do TAM em induzir morte celular em linfocitos humanos cultivados in vitro. Oslinfocitos foram obtidos de mulheres jovens (25-30 anos; n = 3 e idosas (58-77 anos; n = 3 e cultivados por 24 ou 48h, com ou sem TAM (20 ƒÊM. Apos a cultura, foram analisadas a viabilidade celular, a resposta imunocitoquimica e a ultraestrutura. Os resultados indicam que o Tamoxifeno induziu morte celular em linfocitos de ambos os grupos, entretanto, as celulas das mulheres idosas apresentaram-se mais sensiveis ao tratamento. A analise imunocitoquimica mostrou maior frequencia de apoptose nas celulas tratadas e o estudo ultraestrutural revelou vacuolos autofagicos nos linfocitos expostos ao Tamoxifeno. Em conclusao, nosso estudo revelou que o TAM

  15. Terapêutica do carcinoma pulmonar não de pequenas celulas

    Directory of Open Access Journals (Sweden)

    Renato Sotto-Mayor

    2002-05-01

    Full Text Available RESUMO: No presente artigo de revisão o autor aborda a terapêutica do carcinoma pulmonar nao de pcquenas células em função do estádio de apresentação da doença, dando especial relevo à sua abordagem multidisciplinar, no sentido de ultrapassarmos o mau prognóstico que o seu diagnóstico ainda acarreta.Discute o Iugar das diferentes modalidades terapêuticas, a terapeutica da recidiva e da progressão tumorais, a do cancro do pulmao no doente idoso, o papel dos novos fármacos e as potencialidades dos novos alvos terapêuticos a nivel da biologia celular e molecular.REV PORT PNEUMOL 2002; Vlll (3: 237-259 ABSTRACT: In the present paper, the author reviews the non-small-cell lung cancer treatment by stages of disease.He states about the therapeutic strategies involving surgery, radiation therapy and chemotherapy, the important role of the multimodality approach of the patients, the relapsing and refractory tumor, the elderly patient, the new drugs, and the potential role of new gene and cell­ -based therapies.REV PORT PNEUMOL 2002; VIII (3: 237-259 Palavras-chave: carcinoma do pulmão, terapêutica, Key-words: Lung cancer, therapeutic

  16. Optimization of surfactant application for synthetic drilling fluid; Otimizacao da aplicacao de emulsificante em fluidos de perfuracao sinteticos

    Energy Technology Data Exchange (ETDEWEB)

    Arruda, Jefferson Teixeira [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Santos, Telma Pitanga; Medeiros, Ana Catarina da Rocha; Garcia, Rosangela Balaban [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Lab. de Pesquisa em Petroleo

    2008-07-01

    The most common synthetic drilling fluids are made of polymerized olefins, paraffin and esters, which have absence of aromatics hydrocarbons and biodegradability as advantages. These fluids have good performance during the drilling operations (high thermal stability) and have low toxicity. Nevertheless, their big disadvantage is the high cost, which limits their use. One of the biggest challenges in working with synthetic fluids is the control of water/oil emulsion stability, being the surfactant the main agent responsible for keeping this stability between both phases of the fluid. The water/oil and oil/water emulsion is defined by the chemical nature of the surfactant. The emulsions can be changed from oil/water to water/oil and vice versa by many mechanisms, such as temperature variation, addition of another surfactant and alteration of the disperse phase volumetric percentage. The aim of this work was the optimization of synthetic drilling fluids formulations by using commercial surfactants. The optimized formulations showed similar rheological properties. After aging at high temperature (300 deg F), some tendency to migration of oil phase in both fluids was observed. This result was associated to the fluid's viscosity. However, the formulations showed high electrical stability, indicating formation of stable emulsions. The HTHP filtration volumes were small. (author)

  17. Comparative study on sintered alumina for ballistic shielding application; Estudo comparativo entre aluminas sinterizadas visando aplicacao em blindagem balistica

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Francisco Cristovao Lourenco de; Goncalves, Diniz Pereira [Centro Tecnico Aeroespacial (CTA), Sao Jose dos Campos, SP (Brazil). Inst. de Aeronautica e Espaco

    1997-12-31

    This work presents a development of the armor made from special ceramic materials and kevlar. An experimental investigation was conducted to study the ballistic penetration resistance on three samples taken from sintered alumina: a commercial one and two formulations A and B made in IAE/CTA. The main differences between the two formulations was the grain size and bend resistance. The knowledge of the mechanisms during the penetration and perforation process allowed to apply a ductile composite laminate made form kevlar under the alumina to delay its rupture. The last ballistic test showed how a Weibull`s modulii and other mechanical properties are able to improve ballistic penetration resistance. (author) 3 refs.

  18. Glycerol: a brief history and their application in stereoselective syntheses; Glicerol: um breve historico e aplicacao em sinteses estereosseletivas

    Energy Technology Data Exchange (ETDEWEB)

    Beatriz, Adilson; Araujo, Yara J.K.; Lima, Denis Pires de, E-mail: adilson.beatriz@ufms.b [Universidade Federal de Mato Grosso do Sul (DQ/UFMS), Campo Grande, MS (Brazil). Dept. de Quimica

    2011-07-01

    Presently glycerol is considered a co-product of biodiesel industry. As the biodiesel production is exponentially increasing, glycerol generated from the transesterification of vegetable oils and fats is also being produced on a large scale, and turned out to be essential seeking for novel alternatives to the consumption of the extra volume, in crude and/or as derivatives high added value. This review mainly deals with chemical and enzymatic transformations of glycerol to obtain chiral building blocks for synthesis of pharmaceuticals and natural products. (author)

  19. Calcium aluminates potential for endodontics and orthopedics applications; Aluminatos de calcio e seu potencial para aplicacao em endodontia e ortopedia

    Energy Technology Data Exchange (ETDEWEB)

    Santos, G.L. dos; Andrade, T.L.; Oliveira, I.R., E-mail: ivonero@univap.br [Universidade do Vale do Paraiba (UNIVAP), Sao Jose dos Campos, SP (Brazil); Pandolfelli, V.C. [Universidade Federal de Sao Carlos (DEMa/UFSCar), SP (Brazil)

    2011-07-01

    The mostly used material in the areas of endodontics (MTA, mineral trioxide aggregate) and bone reconstruction (PMMA, polymethyl methacrylate) present some limiting properties requiring thus changes in their compositions as well as the development of alternative materials. In this context, a novel biomaterial-based calcium aluminate cement (CAC) has been studied in order to keep the positive properties and clinical applications of MTA and PMMA, overcoming some their disadvantages. Recent studies involving the use of CAC are based on commercial products consisting of a mixture of phases. Improvements can be attained by searching the synthesis routes of CAC aiming the proper balance between the phases and the control of impurities that may impair its performance in applications in the areas of health. By the optimization of the CAC phases production, this article aims to present their characterization based on hydration temperature; working time and setting time; pH, ions solubilization and dissolution in contact with water and different solutions of simulated body fluid. The results indicated the CA phase as the most suitable for application in the areas of health. (author)

  20. Application of the ultrashort pulses in bovine dental enamel; Aplicacao de pulsos ultracurtos em esmalte dental bovino

    Energy Technology Data Exchange (ETDEWEB)

    Todescan, Carla de Rago

    2003-07-01

    The interaction of lasers with the hard structures of the teeth, has found the excess of heat as a problem for its utilization. This study analyzes, in vitro, the interaction of the ultrashort pulse laser of Ti:safire (830 nm) with the bovine dental enamel. The system consisted in one main oscillator integrated with an amplifier (CPA). The pulses extracted before the temporal compression inside the amplifier had 30 ps, 1000 Hz and {approx}1 mJ. The pulses extracted after the compression had 60 fs, 1000 Hz and {approx}0,7 mJ. The M{sup 2} was 1,3, the focal lens 2,5 cm, the focal distance 29,7 and a computerized translation stage x,y,z. We evaluated the amount of tissue removed per pulse,the resulting cavities and the surrounding tissues not irradiated, under OM and SEM. The fluency was the major factor for differentiating the two regimens studied, therefore, the intensity was not so important as we expected in this process. We found: one ablation region in 'cat tongue', one ablation length, one fluency {approx}0,7 J/cm{sup 2} for 30 ps and {approx}0,5 J/cm{sup 2} for 60 fs (50% of high speed burr), smooth edge for 30 ps and high precision of the sharp edge cut of submicrometric order for 60 fs. (author)

  1. The royalties application on President Kennedy city, Espirito Santo, Brazil; A aplicacao dos royalties em Presidente Kennedy, ES

    Energy Technology Data Exchange (ETDEWEB)

    Knaak, Fabricio Jose Bassetto; Cardia, Tarik Hajab [Centro Universitario Vila Velha (UVV), ES (Brazil). Curso de Relacoes Internacionais

    2008-07-01

    This work aims to assemble a study of implementation of royalty in the municipality of President Kennedy - the state of Espirito Santo, showing the disparity between the collection of royalties on oil and quality of infrastructure that the city offers. Based on data the prefecture of the municipality, PNUD and competent bodies, we will show how the money is being used comes from royalties on oil, and what policies the city council's adopting this to apply this feature. (author)

  2. Performance of direct ethanol and methanol fuel cells as function of alcohol concentration applied to the anode of those cells; Desempenho de celulas a combustivel com alimentacao direta de etanol (CCADE) e celulas a combustivel com alimentacao direta de metanol (CCADM) em funcao da concentracao do alcool aplicado ao anodo destas celulas

    Energy Technology Data Exchange (ETDEWEB)

    Belchor, P.M.; Forte, M.M.C. [Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil); Correa, J.P.; Kuhn, C.K.; Carpenter, D. [FURB -Fundacao Universidade Regional de Blumenau, SC (Brazil)

    2010-07-01

    This paper aimed to compare the performance of a CCADE and a CCADM as function of diminishing of concentration of alcohol applied top the anode of each cell. As result, reaching a diminishing the concentration of each alcohol through the mix of each one with the deionized water, one obtained a improved humidification and sensible reduction of the permeability of cationic membrane, generating a gain of performance of the functioning both cells. (author)

  3. Crioterapia no pos-parto: tempo de aplicacao e mudancas na temperatura perineal

    Directory of Open Access Journals (Sweden)

    Adriana Amorim Francisco

    2013-06-01

    Full Text Available Estudo descritivo com dados de dois ensaios clínicos realizados em 2008 e 2009 em uma maternidade de uma instituição filantrópica da cidade de São Paulo. Teve como objetivo descrever a temperatura perineal após a aplicação de bolsa de gelo no pós-parto normal. Três grupos com 38 puérperas cada (n=114 receberam aplicação perineal de bolsa de gelo entre 2 e 48h após o parto. Os achados indicaram que com 10 min de crioterapia as médias da temperatura perineal atingiram de 13,3 a 15,3oC, com pequena redução de temperatura ao final de aplicações de 15 e 20 minutos (2,4 e 2,7o, respectivamente. Após resfriamento por 10 min., as mulheres referiram frio e alívio e, depois de 15 a 20 min., dormência e anestesia local. Conclui-se que 10 minutos de aplicação foram suficientes para reduzir a temperatura perineal aos níveis recomendados para analgesia (10-15oC.

  4. Characterization of OSL dosemeters for application in dose evaluation in computerized tomography procedures; Caracterizacao de dosimetros OSL para aplicacao em avaliacoes de doses em procedimentos de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Louise M.G.; Santos, Josilene C.; Umisedo, Nancy K.; Terini, RIcardo A.; Costa, Paulo R. [Universidade de Sao Paulo (USP), SP (Brazil). Instituto de Fisica

    2016-07-01

    This work aims to present results of the characterization of Al{sub 2}O{sub 3}:C optically stimulated luminescent detector (OSLD). The following aspects were studied: sensitivity, energy response and air kerma dependence in computed tomography (CT) energy range. The main objective of this work is to evaluate the applicability of this kind of dosimeter for CT organ dose assessment. The energy response showed a non-homogenous pattern which has already been found in literature. The air kerma dependence of OSL signal showed a linear trend. Concerning their sensitivity, it was observed that the same batch can have different responses for the same quality, after a second irradiation step, which shows that this kind of detector should be used with care in case of more than one irradiation. (author)

  5. Study of nanostructured clay's application in photoactivated restorative resins, used in dentistry; Estudo da aplicacao de argilas nanoestruturadas em resinas restauradoras fotoativadas, utilizadas em odontologia

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Luiza Melo de Paiva

    2012-07-01

    The problem caused by polymerization shrinkage is critical, because the resin must remain closely in the tooth cavity while gaining rigidity and decrease its dimensions. Forcing the restorative material to distance or to separate the walls of the cavity, the resulting disruption would lead to microleakage, responsible for other problems such as secondary caries, postoperative soreness and may even cause pulpal changes. This process induces the volumetric change of the compound, given by the union of radicals in the formation of the macromolecule (polymer), causing a decrease in volume. This study aimed to develop new experimental composites through the addition of nano components clay minerals in a polymer matrix-based BisGMA / TEGDMA, to evaluate the possibility of a different dimensional behavior during the polymerization. Were used in this study, experimental composites added nanoparticle clay MMT Cloisite 10A (at concentrations of 50, 55, 60, 65 and 70 wt%) and Cloisite 30B (at concentrations of 50, 55, 60 and 65 wt%), which were then compared with the performance of the experimental composites added with micro-particles of silanized silica hybrid Aerosil OX-50 (at concentrations of 50, 60, 65 and 70 wt%). Was used the methods of characterization: Scanning Electron Microscopy (SEM), Thermal-Mechanical Analysis (TMA), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Absorption Spectroscopy in the Region of the Infrared (FTIR), X-ray Diffraction (XRD), Micro Hardness Knoop, Holographic Interferometry Technique (HIT), Digital Holography (DH), Correlation Image (CI) and Thermography. It was observed that the experimental composites with nanoparticles added clay Cloisite 10A and Cloisite 30B, performed better on tests that measured the polymerization shrinkage (TMA, HIT/HD/IC) and the micro hardness (Knoop), in relation to composites added with Silica Aerosil OX-50. These results may be related to the interaction polymer/clay and the nano composites formation, observed by XRD analysis. Among the nanoparticles studied, the Cloisite 30B showed the most significant results in relation to the nanoparticle Cloisite 10A and this can be attributed to chemical affinity and polar nature of that nanoparticle. (author)

  6. Synthesis of human prolactin in Chinese hamster ovary (CHO) cells; Sintese de prolactina humana em celulas de ovario de hamster chines (CHO)

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Carlos Roberto Jorge

    2000-07-01

    Three different eukaryotic expression vectors, based on the same selectable gene marker (dhfr), have been used for dhf- CHO cells transfection to rapidly isolate stable cell lines capable of secreting high levels of recombinant human prolactin (rec-hPRL). Two vectors, one codifying a human prolactin (p658-hPRL) and the other a tag-prolactin (p658-tagPRL), contain the complete hepatitis B virus-X (HBV-X) gene coding for a viral transactivator and a sequence derived from the granulocyte-macrophage colony-stimulating factor (GM-CSF) that mediates selective dhfr mRNA degradation. These vectors have the advantage of rapidly obtaining stable cell lines without methotrexate amplification. The highest secretion obtained by these vectors was of approximately 10 {mu}g hPRU10{sup 6} cells/day. The other vector (pEDdc-hPRL) is based on a dicistronic expression system, containing an internal ribosome entry site isolated from the encephalomyocarditis (EMC) virus. This vector before amplification provided secretion levels at least 10 fold lower than that obtained with the other two vectors. However, after three steps of methotrexate amplification, it provided some clones able to secrete up to 30 {mu}g hPRU10{sup 6} cells/day. This is the first report describing the production and purification of rec-hPRL from CHO cells, obtaining secretion levels with both vectors higher than those reported so far for this hormone in other eukaryotic systems. CHO-derived rec-hPRL contained approximately 10 % of the glycosylated form, a value that is consistent with results reported for hPRL purified from the pituitary or from transformed murine C-127 cells. CHO-derived rec-hPRL was purified with good yield, obtaining also a good resolution between non-glycosylated and glycosylated prolactin. The latter, when its potency was determined via an in vitro bioassay, presented a 47 % lower bioactivity. A qualitative and quantitative analysis of these forms was also possible thanks to the setting up of a reversed-phase HPLC technique, for the first time applied to this hormone. A pilot production in a hollow fiber bioreactor provided a highly concentrated medium, though with the presence of considerable amounts of hPRL{sub 11-199} fragments, apparently the result of a proteolytic process. (author)

  7. Snake venoms components with antitumor activity in murine melanoma cells; Componentes derivados de venenos de serpentes com acao antitumoral em celulas de melanoma murino

    Energy Technology Data Exchange (ETDEWEB)

    Queiroz, Rodrigo Guimaraes

    2012-07-01

    Despite the constant advances in the treatment of cancer, this disease remains one of the main causes of mortality worldwide. So, the development of new treatment modalities is imperative. Snake venom causes a variety of biological effects because they constitute a complex mixture of substances as disintegrins, proteases (serine and metalo), phospholipases A2, L-amino acid oxidases and others. The goal of the present work is to evaluate a anti-tumor activity of some snake venoms fractions. There are several studies of components derived from snake venoms with this kind of activity. After fractionation of snake venoms of the families Viperidae and Elapidae, the fractions were assayed towards murine melanoma cell line B16-F10 and fibroblasts L929. The results showed that the fractions of venom of the snake Notechis ater niger had higher specificity and potential antitumor activity on B16-F10 cell line than the other studied venoms. Since the components of this venom are not explored yet coupled with the potential activity showed in this work, we decided to choose this venom to develop further studies. The cytotoxic fractions were evaluated to identify and characterize the components that showed antitumoral activity. Western blot assays and zymography suggests that these proteins do not belong to the class of metallo and serine proteinases. (author)

  8. Dancoff factors of unit cells in cluster geometry with partial absorption of neutrons; Fatores de Dancoff de celulas unitarias em geometria cluster com absorcao parcial de neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Leticia Jenisch

    2011-01-15

    In its classical formulation, the Dancoff factor for a perfectly absorbing fuel rod is defined as the relative reduction in the incurrent of resonance neutrons into the rod in the presence of neighboring rods, as compared to the incurrent into a single fuel rod immersed in an infinite moderator. Alternatively, this factor can be viewed as the probability that a neutron emerging from the surface of a fuel rod will enter another fuel rod without any collision in the moderator or cladding. For perfectly absorbing fuel these definitions are equivalent. In the last years, several works appeared in literature reporting improvements in the calculation of Dancoff factors, using both the classical and the collision probability definitions. In this work, we step further reporting Dancoff factors for perfectly absorbing (Black) and partially absorbing (Grey) fuel rods calculated by the collision probability method, in cluster cells with square outer boundaries. In order to validate the results, comparisons are made with the equivalent cylindricalized cell in hypothetical test cases. The calculation is performed considering specularly reflecting boundary conditions, for the square lattice, and diffusive reflecting boundary conditions, for the cylindrical geometry. The results show the expected asymptotic behavior of the solution with increasing cell sizes. In addition, Dancoff factors are computed for the Canadian cells CANDU-37 and CANFLEX by the Monte Carlo and Direct methods. Finally, the effective multiplication factors, k{sub eff}, for these cells (cluster cell with square outer boundaries and the equivalent cylindricalized cell) are also computed, and the differences reported for the cases using the perfect and partial absorption assumptions. (author)

  9. Fora da ordem natural: a natureza nos discursos sobre a clonagem e a pesquisa com celulas-tronco em jornais brasileiros

    Directory of Open Access Journals (Sweden)

    Flavia Natercia da Silva Medeiros

    2013-11-01

    Full Text Available Noções de natureza desempenham um papel na cobertura midiática e nas percepções do público sobre as biotecnologias. Neste estudo, fez-se uma análise de discurso das ideias de natureza e natural usadas na cobertura jornalística brasileira da clonagem e das células-tronco. Nos discursos oponentes, as técnicas biotecnológicas foram postas fora da ordem natural e consideradas imorais. Nos discursos defensores, apareceu uma natureza indiferente ou cruel para com o destino humano, ou obstáculo a ser superado; por outro lado, a clonagem e as células-tronco embrionárias foram naturalizadas, e a ovelha Dolly foi antropomorfizada. As representações mitificantes ou transcendentes da natureza não incidem somente sobre as percepções públicas, têm implicações éticas e políticas.

  10. Technological evaluation of fuel cells using natural gas for distributed power generation; Avaliacao tecnologica da utilizacao de gas natural em celulas a combustivel para geracao distribuida de energia

    Energy Technology Data Exchange (ETDEWEB)

    Brandao, Mauricio O. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE). Programa de Engenharia Mecanica; Giannini, Marcio P.; Arouca, Mauricio C. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE). Programa de Planejamento Energetico

    2004-07-01

    The search for sustainable and more rational means of power generation motivates the scientific crew to search for more efficient and cleaner systems. Oil dependence becomes from the kind of development that the humanity had and cannot be dismissed. The question is how to use this source in a more intelligent way. Fuel Cells are electrochemical devices that convert into electric energy the chemical energy from oxi-reduction reactions between a fuel and an oxidant. The current fuel used in a Fuel Cell is hydrogen and oxygen is the oxidant. The great advantage of this device is its efficiency, higher than the one achieved with internal combustion engines. Also Fuel Cells are not limited by Carnot's efficiency. This paper is about the implementation of a distributed generation system using Fuel Cells. Technical aspects are approached together with economical and environmental needs. The already existence of Gas pipelines and the grown production of Natural Gas presented by Brazil turns it into a good market for the implementation of this energy source. The evaluation of this paper shows that is technically possible to use NG in Fuel Cells, mostly in South and Southeast regions, applying the distributed generation of energy concept. The most interesting in a strategic manner is that Brazil already have an indication that it's capable of developing this technology, opening a new market tuning with world's new technological developments. Many research centers develop this technology, not only from the cell composition itself, but also manufacturing techniques. (author)

  11. Estudos sobre a regeneração do figado - variação do volume nuclear das celulas hepáticas em repouso divisional

    Directory of Open Access Journals (Sweden)

    Fernando Ubatuba

    1948-12-01

    Full Text Available Surgical removal of large amounts of hepatic tissue in male albino rats results in a rapid and conspicuous raise in cellular nuclear volumes. Measurements were made exclusively in resting nuclei. This volume variation is transitory. Nuclear volumes return to the normal value withins 6 days of restoration. The higher value are abserved 48 hours after the hepatic removal, indicating probably that this effect is due to hydration of the nucei, as occurs in the cytoplasm. This hydration could be correlated to the mitotic activity of the renmant tissue since a peak of mitoses parallels the changes in the nuclear volumes.

  12. Multi-metallic anodes for solid oxide fuel cell applications; Anodos multi-metalicos para aplicacoes em celulas a combustivel de oxido solido

    Energy Technology Data Exchange (ETDEWEB)

    Restivo, T.A. Guisard; Mello-Castanho, S.R.H. [Instituto de Pesquisas Energeticas e Nucleares (CCTM/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Centro de Ciencia e Tecnologia dos Materiais; Leite, D. Will [Instituto de Pesquisas e Estudos Industriais (IPEI/FEI), Sao Bernardo do Campo, SP (Brazil). Fac. de Engenharia Industrial

    2009-07-01

    A new method for direct preparation of materials for solid oxide fuel cell anode - Ni- YSZ cermets - based on mechanical alloying (MA) of the original powders is developed, allowing to admix homogeneously any component. Additive metals are selected from thermodynamic criteria, leading to compacts consolidation through sintering by activated surface (SAS). The combined process MA-SSA can reduce the sintering temperature by 300 deg C, yielding porous anodes. Densification mechanisms are discussed from quasi-isothermal sintering kinetics results. Doping with Ag, W, Cu, Mo, Nb, Ta, in descending order, promotes the densification of pellets through liquid phase sintering and evaporation of metals and oxides, which allow reducing the sintering temperature. Powders and pellets characterization by electronic microscopy and X-ray diffraction completes the result analyses. (author)

  13. Polypropylene (PP) based proton exchange membrane for use in fuel cell; Obtencao de membrana trocadora de protons para uso em celula a combustivel, a base de polipropileno (PP)

    Energy Technology Data Exchange (ETDEWEB)

    Zen, Heloisa Augusto

    2008-07-01

    The radiation-induced graft of styrene onto polypropylene (PP) films was carried out by simultaneous irradiation method in a cobalt-60 source. The PP films were immersed in a solution of styrene with toluene (1:1 and 4:1, v/v) under inert atmosphere and at room temperature and then submitted at 20, 40, 80 and 100 kGy. After graft reaction the films were kept at room temperature under inert atmosphere for periods of 7, 14, 21 and 28 days in order to evaluate the degree of grafting. At the end of each period the films were sulfonated to provide the hydrophilic property to PP. The degree of grafting (DOG) was gravimetric determined and the chemical changes in the grafted and sulfonated films were characterized by Infrared Spectroscopy, Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry and the Ion Exchange Capacity (IEC) was calculated. The greatest DOG was obtained after 21 days of post-irradiation. By TGA the grafted films exhibited a decrease in the thermal stability, while the sulfonated exhibited an increase. By DSC was possible to verify that matrix polymeric did not suffer any drastic change in the melting temperature after grafting and sulfonation reactions. The IEC calculated shows that the new membrane developed has ionic conductivity property. (author)

  14. Preparation of PVDF and PTFE membranes for fuel cell use; Preparacao de membranas de PVDF e PTFE enxertadas e sulfonadas para uso em celula a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Geraldes, Adriana N.; Zen, Heloisa A.; Ferreira, Henrique P.; Parra, Duclerc F.; Lugao, Ademar B.; Linardi, Marcelo [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: angeral@ipen.br

    2007-07-01

    Grafting of styrene onto polyvinylidenefluoride (PVDF), polytetrafluoroethylene (PTFE) was studied using styrene/toluene solutions. First, PTFE and PVDF films were prepared and the process was conducted by radiation induced graft polymerization of styrene, by a Co{sup 60} source. Films of PTFE and PVDF were immersed in styrene/toluene at 1:1 (v/v) concentration and then submitted to gamma radiation at 20 kGy doses. After irradiation, the samples were evaluated at the period of 21 days at room temperature in order to observe the grafting degree. Chemical changes in the PVDF and PTFE films after styrene grafting were monitored and the results were evaluated by FTIR, DSC, TGA and degree of grafting (DOG). The ion exchange capacity (IEC) after sulfonation of 1, 2 and 24 hours were also determined. (author)

  15. Deficiência hídrica e aplicação de ABA nas trocas gasosas e no acúmulo de flavonoides em calêndula (Calendula officinalis L. = Water deficit and ABA application on leaf gas exchange and flavonoid content in marigold (Calendula officinalis L..

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Pacheco

    2011-04-01

    Full Text Available O objetivo deste trabalho foi avaliar os efeitos da deficiencia hidrica e aplicacao de acido abscisico (ABA sobre aspectos fisiologicos e teor de flavonoides em plantas de calendula. Oexperimento foi instalado em condicoes de casa-de-vegetacao com plantas envasadas. No inicio do florescimento de plantas de calendula, foram aplicados quatro intervalos de suspensao da irrigacao (irrigacao diaria; tres; seis e nove dias sem irrigar, acompanhados por tres doses de ABA (0, 10 e 100 ƒÊM. Avaliou-se o conteudo relativo de agua na folha (CRA e as trocas gasosas, utilizando-se um analisador portatil por infravermelho (A: fotossintese liquida, gs: condutancia estomatica, E: transpiracao, Ci: concentracao intercelular de CO2 e EUA: eficiencia de uso daagua. Aos nove dias sem irrigacao ocorreram reducoes significativas em todas as variaveis de trocas gasosas analisadas, independente da aplicacao de ABA. Concluiu-se que o efeito principal do ABA foi o de causar diminuicao na gs, a qual foi acompanhada de reducao em A somente quando as plantas estavam desidratadas. As intensidades de deficiencia hidrica testadas nao causaram interferencia no acumulo de flavonoides nas inflorescencias. Entretanto, o ABA restringiu a biossintese de flavonoides, tanto nas plantas-controle como nas plantas submetidas a deficiencia hidrica.The goal of this study was to evaluate the effects of water deficit and abscisic acid (ABA application on physiological parameters and flavonoid production in marigold plant. The experiment was performed under nursery conditions with potted plants. It was tested water deficit by withholding water (control . diary irrigation, 3, 6 and9 days without irrigation followed by 3 ABA concentrations (0, 10 e 100 ƒÊM applied in the beginning of blooming. It was evaluated the relative water content and the leaf gas exchange using a portable infrared gas analyzer (A: net photosynthesis, gs: stomatal conductance, E: transpiration, Ci: CO2 intercellular

  16. Evaluation of the radio modifier effect of propolis on chinese hamster ovary (CHO-K1) and human prostate cancer (PC3) cells, irradiated with 60-CO; Avaliacao do efeito radiomodificador da propolis em celulas de ovario de hamster chines (CHO-K1) e em celulas tumorais de prostata (PC3), irradiadas com CO-60

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Geyza Spigoti

    2011-07-01

    In the last decades, it has been given a great interest to investigations concerning natural, effective, nontoxic compounds with radioprotective potential together with the increasing utilization of different types of ionizing radiation for various applications. Among them propolis, a resinous compound produced by honeybees (Apis mellifera), has been considered quite promising, since it presents several advantageous biological characteristics, i. e., anti-inflammatory, antimicrobial, anticarcinogenic, antioxidant and also free radical scavenging action. The purpose of the present study was to evaluate the effect of Brazilian propolis, collected in the State of Rio Grande do Sul, on Chinese hamster ovary (CHO-K1) and human prostate cancer (PC3) cells, irradiated with {sup 60}Co {gamma} radiation. For this purpose, three interlinked parameters were analyzed: micronucleus induction, cell viability and clonogenic death. The choice of these parameters was justified by their biological significance, in addition to the fact that they are readily observable and measurable in irradiated cells. The cytogenetic data obtained showed a radioprotective effect of propolis (5-100 {mu}g/ml) in the induction of DNA damage for both cell lines, irradiated with doses of 1 - 4 Gy. The cytotoxicity assay, however, showed a prominent antiproliferative effect of propolis (50 - 400{mu}/ml) in PC3 cells irradiated with 5 G{gamma}. The survival curves obtained were adequately fitted by a linear-quadratic model, where the {alpha} coefficient was higher in CHO-K1 cells. Concerning the clonogenic capacity, PC3 cells were more radiosensitive than CHO-K1 cells at the higher doses of the survival curve. Propolis at the concentrations of 30 - 100 {mu}g/ml, did not influence the clonogenic potential of PC3 cells, since the survival curves, associated or not with propolis, were found similar, although the combined treatment in CHO-K1 cells exhibited a stimulating proliferative effect. The data obtained in vitro showed a potential use of propolis AF-08, a natural and nontoxic compound, in the prevention against the adverse effect of ionizing radiation, at the doses and concentrations here analyzed. (author)

  17. Implementation of ozonation process in degradation of the phenols present in petrochemistry effluents; Aplicacao do processo de ozonizacao na degradacao de fenois presentes em efluentes petroquimicos

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Fernanda Batista de; Souza, Antonio Augusto Ulson de; Souza, Selene Maria Arruda Guelli Ulson de [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil)

    2008-07-01

    The water contamination by the petrochemical pollutants with high toxicity, such as phenols, is a subject of interest of several researchers. The ozone is an alternative for the effluents treatment, being effective in environmental decontamination, reducing the COD and degrading the phenols. The ozone stability depends on the water pH, the type and content of organic matter. This study aimed to investigate in the phenol ozonation, evaluating the phenol and COD removal at different pHs. Ozone as injected in 5 L of phenol solution of 50 mg L-1 at pH = 2, 7 and 10, from 1 to 25 minutes, and then was measured the quantity of COD and phenol. It was found that in acid pH the ozone has increased the stability, because 82.19% of the ozone that enters in the column remains in solution. The phenol degradation was faster in alkaline solution (pH=10), where in 15 minutes of treatment, 99.7% of phenol was consumed. The COD removal increased from 7.3% in 6 minutes to 87.8% in 30 minutes, but the COD removal increases more slowly than that of phenol which was 53, 8% in 6 min, increasing to 99.2% at 25 min for pH=7. (author)

  18. Characterization of quartzite waste and their application on red ceramic; Caracterizacao de residuo de quartzitos e sua aplicacao em ceramica vermelha

    Energy Technology Data Exchange (ETDEWEB)

    Babisk, M.P.; Vidal, F.W.H., E-mail: mbabisk@cetem.gov.br [Centro de Tecnologia Mineral (CETEM/MCT), Rio de Janeiro, RJ (Brazil); Vieira, C.M.F.; Ribeiro, W.S. [Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, RJ (Brazil)

    2012-07-01

    The incorporation of industrial waste into red ceramic have been used currently in the search for alternative raw materials, and also seeking for an environmentally friendly waste disposal that pollute. During the process of beneficiation of dimension stone, there are significant losses of material and waste generation, which have been placed inappropriately in nature, with no provision for use or reuse. The quartzite is geologically classified as a metamorphic rock composed almost entirely of quartz grains. The aim of this study is to characterize and evaluate the applicability of quartzite waste in the red ceramic. Incorporations were studied up to 40% by weight of waste in the ceramics body and the results indicated that the residue of quartz is a material with great potential to be used as a component in a red ceramic. (author)

  19. Development and application of a pediatric head phantom for dosimetry in computed tomography; Desenvolvimento e aplicacao de um simulador pediatrico craniano para dosimetria em tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Elaine Wirney

    2016-11-01

    To determine the exposure levels and the absorbed dose in patients undergoing CT scans, is necessary to calculate the CT dose index in measurements with a PMMA or water phantom. The phantom must be enough to simulate the attenuation and scattering characteristics of a human body or parts in a radiation field. The CT specific quantities : CT air kerma index (Ca,100) , weighted CT air kerma index (CW ), a total volume CT air kerma index (Cvol) and the CT air kerma-length product (PKL) must be determined and compared to literature reference levels. In this work a head pediatric phantom was developed, considering that the Brazilian published Diagnostic Reference Levels (DRL) are based on adult phantom measurements. This developed phantom shows a construction innovation using materials to simulate the skullcap, cortical bone (aluminum) and cancellous bone (PVC), and it was filled with distilled water. The phantom dimension follows the recommendations of the World Health Organization and the International Commission on Radiation Units for children from 0 to 5 years old head size: diameter of 160 mm and height of 155 mm. The skullcap has 4 mm of thickness and 111.9 mm of internal diameter. In order to evaluate its behavior, tests were carried out in calibration laboratories and in clinical beams. The results showed attenuation up to 23% when different materials are used as skullcap, demonstrating that the DRLs adopted could be overestimating the dose received by pediatric patients. It is observed that the dose received by CT skull scans presents different distribution, due to the skullcap partially attenuation and/or backscattering which is not considered when the PMMA phantom is used.

  20. Study and development of an Iridium-192 seed for use in ophthalmic cancer; Estudo e desenvolvimento de uma semente de iridio-192 para aplicacao em cancer oftalmico

    Energy Technology Data Exchange (ETDEWEB)

    Mattos, Fabio Rodrigues de

    2013-07-01

    Even ocular tumors are not among the cases with a higher incidence, they affect the population, especially children. The Institute of Energy and Nuclear Research (IPEN-CNEN/SP) in partnership with Escola Paulista de Medicina (UNIFESP), created a project to develop and implement a alternative treatment for ophthalmic cancer that use brachytherapy iridium-192 seeds. The project arose by reason of the Escola Paulista treat many cancer cases within the Unified Health System (SUS) and the research experience of sealed radioactive sources group at IPEN. The methodology was developed from the available infrastructure and the experience of researchers. The prototype seed presents with a core (192-iridium alloy of iridium-platinum) of 3.0 mm long sealed by a capsule of titanium of 0.8 mm outside diameter, 0.05 mm wall thickness and 4,5mm long. This work aims to study and develop a seed of iridium-192 from a platinum-iridium alloy. No study on the fabrication of these seeds was found in available literature. It was created a methodology that involved: characterization of the material used in the core, creation of device for neutron activation irradiation and and seed sealing tests. As a result, proved the feasibility of the method. As a suggestion for future work, studies regarding metrology and dosimetry of these sources and improvement of the methodology should be carried out, for future implementation in national scope. (author)

  1. Application of biomass in oil and fat reduction content in aqueous effluent; Aplicacao de biomassa na reducao do teor de oleos e graxas presentes em efluentes aquosos

    Energy Technology Data Exchange (ETDEWEB)

    Boni, Hevelin Tabata; Souza, Antonio Augusto Ulson de; Souza, Selene Maria de Arruda Guelli Ulson de [Universidade Federal de Santa Catarina (UFSC), SC (Brazil)

    2012-07-01

    In this work, we have studied the bagasse from sugarcane as an alternative bioadsorbent in the treatment to oils and greases contaminated waters. The synthetic effluent was simulated by a distilled water and decahydronaphthalene dispersion, with initial concentration of 8900 mg . L {sup -1}. Gas chromatography was the analytical operation chosen to quantify the oil residual after the adsorption. The biomass was characterized by moisture analysis, CHNS and SEM. The experiments were carried out in batch process with agitation of 120 rpm, evaluating the equilibrium time of adsorptive process and the influence of pH of aqueous level. Results showed that the adsorption process achieved equilibrium quickly, in just 5 minutes of contact between the dispersion and biomass. No significant influence was noticed in the removal of hydrocarbon with the change in pH. The adsorption isotherm was developed changing by the mass of bioadsorbent, at 25 deg C, pH 6 and 120 rpm of agitation. The experimental results were fitted by Langmuir and Langmuir- Freundlich models. The best fit was obtained with Langmuir-Freundlich, providing a maximum adsorption capacity of 6,65 g hydrocarbon / g biomass. The experiments showed the great potential of the sugarcane bagasse to be used as bioadsorbent in reducing the oil and grease levels in industrial effluents. This alternative presents itself as a sustainable route due to the abundance of sugar cane bagasse in the sugar and alcohol industry, avoided the impact of aqueous sources contamination coming from oil and petrochemical industry. (author)

  2. Characterization of isolated communities: application in the city of Ubatuba, Sao Paulo state, Brazil; Caracterizacao de comunidades isoladas: aplicacao em comunicade de Ubatura/SP

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Maria Julita Guerra [Secretaria de Estado de Energia, Recursos Hidricos e Saneamento (SERHS), Sao Paulo, SP (Brazil)], e-mail: mjulita@sp.gov.br; Pilla, Adelina Teixeira Fonseca de [Equilibrio, Desenvolvimento Ambiental Ltda., Sao Paulo, SP (Brazil)], e-mail: adelina.fonseca@uol.com.br

    2004-07-01

    This paper presents a methodology for characterization of isolated communities, developed on a consultant work for the Ministry of Mines and Energy - MME. It still presents the application of this methodology of analysis on a isolated community in the city of Ubatuba, Sao Paulo state. (author)

  3. Urethan foams application for polychlorinated biphenyls adsorption in insulated mineral oil; Aplicacao de espumas uretanicas para adsorcao de bifenilas policloradas em oleo mineral isolante

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Analucia L.; Trindade, Eduardo M.; Wilhelm, Helena M.; Mattoso, Mauricio; Patriarca, Percia A.; Farias, Luciano; Ciulik, Claudio; Groszewicz, Pedro B. [LACTEC - Instituto de Tecnologia para o Desenvolvimento, Curitiba, PR (Brazil)]. E-mail: analucia@lactec.org.br; Zawadzki, Sonia F. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Dept. de Quimica]. E-mail: zawadzki@quimica.ufpr.br

    2005-07-01

    Urethanic foams are applied on several industrial fields, as automobile factories and refrigeration equipment. On specific applications, these foams can be used as filters for organo chlorinated compounds removal, as pesticides and polychlorinated biphenyls (PCB), present on ambient air and aqueous matrices. For this last purpose, the aim of this work was the preparation of special urethanic foams and their evaluation as filtering systems for PCB removal from mineral insulating oil used in electric power transformers. For the foam efficiency improvement it was used a structure modified poli ol in the polymerization reaction. The foams were applied for field removal of PCB from mineral oil and the results showed their applicability for this process. However, it was observed that the results were dependent on the foam homogeneity, on the velocity of oil circulation and on the adsorption processes. (author)

  4. Analysis of implementation of energy efficiency labeling of buildings in hotel developments; Analise da aplicacao da etiquetagem de eficiencia energetica de edificacoes em empreendimentos hoteleiros

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Myrthes Marcele Farias dos; Faria, Ricardo Wargas de; Hamada, Luciana; Nascimento, Paulo Roberto Lopes do [Servico Brasileiro de Apoio as Micro e Pequenas Empresas (SEBRAE), Rio de Janeiro, RJ (Brazil). Programa de Energia e Eficiencia Energetica

    2010-07-01

    Most Brazilian constructions have low performance in terms of energy, since they received little attention (or none) concerning the energy efficiency. One of the main aspects observed is the intense use of electric energy for climatization and lighting in order to provide comfortable conditions for the dwellers. In 2009, new perspectives to change this situation emerged, due to an initiative by the Federal Government, that established the necessary regulations for energy efficiency labelling in buildings, and broadened the Brazilian Labelling Program (PBE), which, up until then, encompassed only machinery and equipment. The purpose of this article is to analyze the compliance with the new regulations for energy efficiency of constructions in the hotel sector, where small businesses are predominant, aiming at highlighting the barriers and opportunities connected to the possibilities of labeling. Hotels have been targeted for large investments, since they have become the pillars of Brazil's project to welcome tourists during the 2014 World Cup and the 2016 Olympic Games. Taking into consideration the need to develop specific methodologies for lodging possibilities, in addition to the scarce information on the use of energy in small businesses, this article is part of a series of researches carried out within the framework of the Sebrae/RJ - Procel Agreement. The outcome is a global analysis, from a business point of view, on the use of labels of energy efficiency in hotel buildings, organized upon two perspectives: the external environment (opportunities and threats) and the internal environment (strong and weak points). (author)

  5. Commutated inversor at low frequency for application of fuel cells in distributed generation; Inversor comutado em baixa frequencia para aplicacao de CaCs na geracao distribuida

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Geomar Machado; Pomilio, Jose Antenor; Vendrusculo, Edson A. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Eletrica e de Computacao], e-mail: antenor@dsce.fee.unicamp.br

    2004-07-01

    The connection of Fuel Cell Power Plants with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. Since the source provides a DC voltage, the converter must be able to produce a low-distortion, high-power factor AC current. This paper presents the results obtained with use of a three-phase and a single-phase inverter using low-frequency commutation. An auxiliary circuit is added to the inverter topologies in order to reduce the output voltage distortion, thus improving the current waveform. The main advantages of this approach are the minimization of the switching losses (i.e. high efficiency) and the elimination of the EMI (which avoids high-frequency filters necessary in high-frequency commutation inverters). (author)

  6. Reproducibility study of thermoluminescent dosemeters for application in personal dosimetry; Estudo da reprodutibilidade de dosimetros termoluminescentes para a aplicacao em dosimetria pessoal

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, Beatriz M.; Morimoto, Richard; Menezes, Francisca L.; Ferri, Paulo L.S.; Santos, Osmar A. dos, E-mail: medeirosmbeatriz@gmail.com [Fundacao do Cancer, Rio de Janeiro, RJ (Brazil)

    2016-07-01

    Nowadays in radiotherapy services due to the big concern about the OEIs' safety is made the personal dosimetry of them. And Thermoluminescent Dosimetry is the most used dosimetric technique. It is necessary that the dosimeters are tested for their characterization and response evaluation before being used. One of these tests is the reproducibility test.This study aims to ensure that the dosimetric system analyzed has the same response to the same dose through the criteria presented by the Testing and Calibration Service Evaluation Committee - CASEC / IRD / CNEN contained in the IRD-RT Document Number 002.02 / 2010{sup o}. The groups showed a coefficient of variation equal to 3.6% for irradiated dosimeters with 25 cGy, 2.7% for irradiated dosimeters with 40 cGy, 6.6% for irradiated dosimeters with 50 cGy and 4.1% for dosimeters irradiated with 100 cGy. Since all these values are less than 7.5%, all four dosimeters groups would be accepted by the criteria used. (author)

  7. Development and characterization of high collapse boron alloys heat treated pipes for oil wells; Tubos de aco TiB para aplicacao em revestimento de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Fabio A.; Silva, Ronaldo; Chad, Luis [Tenaris Confab, Pindamonhangaba SP (Brazil); Fritz, Marcelo C. [Tenaris Confab, Pindamonhangaba SP (Brazil). Dept. de Engenharia do Produto

    2008-07-01

    The utilization of OCTG (Oil Country Tubular Goods) pipes will increase with the discovery of new oil wells in ultra deep waters. This study aims to evaluate the mechanical and microstructural performance of welded and heat treated pipes through quenching and tempering using a steel project based in titanium/boron for casing pipes. The objective of this development is to present a set of techniques used during the manufacturing of heated treated ERW pipes boron allowing, discussing mechanical and metallurgical aspects of the steel project, coil conformation, heat treatment and test procedures. The results are within the limits set by the API 5CT standard. It was found that the pipes obtained good geometry and uniformity of mechanical properties, showing that this product can be applied safely and reliability as wells' casing. (author)

  8. Evaluation of commercial and sulfated ZrO{sub 2} aiming application catalysis; Avaliacao de ZrO{sub 2} comercial e sulfatada visando aplicacao em catalise

    Energy Technology Data Exchange (ETDEWEB)

    Silva, F.N.; Dantas, J.; Costa, A.C.F.M., E-mail: nilson.s@hotmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Pos-Graduacao em Engenharia de Materiais; Pallone, E.M.J.A. [Universidade de Sao Paulo (USP), Pirassununga, SP (Brazil). Departamento de Ciencias Basicas; Dutra, R.C.L. [Instituto de Aeronautica e Espaco (AQI/IAE), Sao Jose dos Campos, SP (Brazil). Divisao de Quimica

    2014-07-01

    This study evaluates the performance of commercial and sulfated ZrO{sub 2} for future application in catalysis. Commercial ZrO{sub 2} was provided by the company Saint-Gobain Zirpro. The sulfation occurred with SO{sub 4}{sup -2} ion content of 30% compared to the mass of ZrO{sub 2}. The samples were characterized by XRD, FTIR, EDX and GD. The results revealed the formation of a monoclinic phase for the commercial sample, and a monoclinic major phase with tetragonal traces for the sulfated sample. The commercial ZrO{sub 2} showed a narrow, bimodal and asymmetric agglomerates distribution, while the sulfated sample showed a narrow, tetramodal and asymmetric agglomerates distribution. The presence of traces of the tetragonal phase in the SO{sub 4}{sup -2}/ZrO{sub 2} XRD, and the presence of SO{sub 3} in the EDX were good indicators for future use in catalysis to provide ester. (author)

  9. Application of fuzzy logic in mapping the environmental impacts of hydroelectric power plants; Aplicacao da logica difusa no mapeamento de impactos ambientais em usinas hidreletricas

    Energy Technology Data Exchange (ETDEWEB)

    Melo, M.N.; Lambert-Torres, G.; Silva, L.E. Borges da [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)], Emails: germanoltorres@gmail.com, leborges@unifei.edu.br; Rissino, S.; Silva, M.F. da [Universidade Federal de Rondonia (UFRO), Porto Velho, RO (Brazil)], e-mails: srissino@gmail.com, felipe@unir.br

    2009-07-01

    During the stages prior to installation of a large enterprise, there is an obligation to obtain an environmental license for its effectiveness. However, defining the relevance of an environmental impact generated by changes elapsed in a region, is something subjective, since some variables present qualitative definitions. Aiming to interrelate the variables that influence the environmental impacts in hydroelectric plants, was made the mapping of terms natural resources and degradation of the environment, and its defining variables, based on the theory of fuzzy logic. The construction of fuzzy propositions was based on the manipulation of a rule base, with the 'if' antecedent 'then' consequent structure. It was concluded that the use of fuzzy propositions for the study of environmental impact is an effective method to map the environmental impact caused by construction of a hydroelectric plant, because it defines the degree of influence of impact on the environment.

  10. Treatment of chemical waste piassava for application in polymeric composites; Tratamento quimico do residuo de piacava para aplicacao em compositos polimericos

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, C.S.; Fiuza, R.P.; Guimaraes, D.H.; Carvalho, G.G.P.; Carvalho, R.F.; Jose, N.M., E-mail: cleidienesm@gmail.co [Universidade Federal da Bahia (GECIM/UFBA), Salvador, BA (Brazil). Inst. de Quimica. Grupo de Energia e Ciencias dos Materiais

    2010-07-01

    Piassava fibers were investigated with the aim of adding new business value. The surface of the fibers were treated with NaOH and H{sub 2}SO{sub 4} for 1 h at room temperature. The samples were characterized by FTIR, TGA, DSC, chemical composition, XRD, SEM and tensile tests. The micrographs of the fibers showed that treatment with NaOH cleaned the fiber surface of a large amount of impurities and cause fibrillation. Chemical analysis, using the Van Soest method, showed that the palm fiber is a fiber rich in lignin, as evidenced by their brown color and with alkali treatment there was partial removal of hemicellulose and lignin, increasing the crystallinity index of the fiber, observed by XRD. The acid treatment caused no significant changes in the properties of the fiber. Therefore, the mercerisation was efficient in the fiber of palm fiber, improving their properties, enabling thus their use as reinforcement in polymer composites. (author)

  11. AAA application in diagnosis exams in a large public hospital, RS, Brazil; Aplicacao do AAA na realizacao de exames diagnosticos em um hospital publico de grande porte

    Energy Technology Data Exchange (ETDEWEB)

    Bacelar, A.; Ferret, A.A.; Vanni, S.; Galhardi, M.P.; Lykawka, R., E-mail: abacelar@hepa.ufrgs.br, E-mail: allferret@gmail.com, E-mail: svanni@hepa.ufrgs.br, E-mail: mpgalhardi@gmail.com, E-mail: rlykawka@hepa.ufrgs.br [Hospital de Clinicas de Porto Alegre (HCPA), Porto Alegre, RS (Brazil)

    2013-10-01

    Objective: the initiative AAA - Awareness , Appropriateness and Audit , promotes consciousness ( Awareness) , fitness ( Appropriateness ) and Audit ( Audit) . This paper analyzes the application of the concept in the AAA requests and justifications examinations using ionizing radiation within a large public hospital. Materials and methods: we collected and analyzed data between the years 2011 and 2012, concerning the number of exams performed with the use of radiation and their justifications. After, we sought to raise awareness of the clinical team through training on the risks and benefits of the various modalities of the radiology department and the need to justify the use of ionizing radiation on health. After the data were collected again of test requests for verification of the effectiveness of training. Results: the mean requests that need to be appropriate to the AAA in the last quarter of 2011 was 75 % lower than the average demands of the first quarter, matched against the last two months of 2012 increased by up to four times the number requests that require improvements in relation to the excellent results obtained in July 2012. Conclusion: it is shown in this paper the need of implementing this initiative AAA continuously added to the clinical staff awareness about the risk of the use of ionizing radiation, the appropriateness of the requests of these tests , as well as the control of this process in order to optimize use of ionizing radiation on health.

  12. Radionecrosis attenuation in wistar rats with cutaneous application of quercetin; Atenuacao da radionecrose em ratos Wistar com aplicacao cutanea de quercetina

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Nelson Mendes

    2016-11-01

    The increased incidence of cancer has been significant in recent decades in the world population, as confirmed by national and international institutions in the health area. The emergence of cancer is influenced, predominantly by genetic and environmental factors, being manifested more in the adult population. The main modalities for cancer treatment (radiotherapy, chemotherapy and surgery) may be used separately or in combination, depending on the type of cancer. Among the methods mentioned, radiation therapy is the one more broadly used for the treatment of patients, having an associated side effect called radiodermatitis, which has degrees of severity ranging from simple erythema to radionecrosis. The manifestation of radiodermatitis may occur during the treatment or after the radiotherapy sessions: both situations have great relevance in the patient's quality of life and social costs. One of the studied alternative therapies for attenuating the radionecrosis is the quercetin cutaneous application. One of the alternative therapies, studied to mitigate or eliminate the radionecrosis, is based on the topical application of quercetin. To evaluate the effectiveness of this mitigation, an animal model of radionecrosis was developed, to be used in Wistar rats. After in vitro studies, the quercetin concentrations and time of application were determined, reducing the number of animals, when in vivo experiments are carried out. With the topical application of 250 μ mol/L of quercetin, one hour prior to gamma irradiation, at a dose of 85 Gy, the side effects of radiation were minimized, avoiding the formation of radionecrosis. There was, also, a tendency to attenuate the wound area in the studied animals, compared to the irradiated animals without the quercetin application. (author)

  13. Development of crystals based in cesium iodide for application as radiation detectors; Desenvolvimento de cristais baseados em iodeto de cesio para aplicacao como detectores de radiacao

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Maria da Conceicao Costa

    2006-07-01

    Inorganic scintillators with fast luminescence decay time, high density and high light output have been the object of studies for application in nuclear physics, high energy physics, nuclear tomography and other fields of science and engineering. Scintillation crystals based on cesium iodide (CsI) are matters with relatively low higroscopy, high atomic number, easy handling and low cost, characteristics that favor their use as radiation detectors. In this work, the growth of pure CsI crystals, CsI:Br and CsI:Pb, using the Bridgman technique, is described. The concentration of the bromine doping element (Br) was studied in the range of 1,5x10{sup -1} M to 10{sup -2} M and the lead (Pb) in the range of 10{sup -2} M to 5x10{sup -4} M. To evaluate the scintillators developed, systematic measurements were carried out for luminescence emission and luminescence decay time for gamma radiation, optical transmittance assays, Vickers micro-hardness assays, determination of the doping elements distribution along the grown crystals and analysis of crystals response to the gamma radiation in the energy range of 350 keV to 1330 keV and alpha particles from a {sup 241}Am source, with energy of 5.54 MeV. It was obtained 13 ns to 19 ns for luminescence decay time for CsI:Br and CsI:Pb crystals. These results were very promising. The results obtained for micro-hardness showed a significant increase in function of the doping elements concentration, when compared to the pure CsI crystal, increasing consequently the mechanical resistance of the grown crystals. The validity of using these crystals as radiation sensors may be seen from the results of their response to gamma radiation and alpha particles. (author)

  14. Production of LiF films for dosimetric thermoluminescence application; Producao de filmes de LiF para aplicacao em dosimetria termoluminescente

    Energy Technology Data Exchange (ETDEWEB)

    Mauricio, Claudia Lucia de Pinho

    2000-12-01

    This work studies the LiF monolayer and multilayer polycrystalline film's dosimetric properties. The films were produced by electron beam evaporation technique in aluminium and stainless steel substrates maintained at several temperatures. As dosimetric variable, the intensity of the thermoluminescent (TL) glow curve of the films was used. effects of the substrate type and temperature; of the addition of layers of Mg F{sub 2} NaF and Cu F{sub 2} to the LiF films; and of thermal treatments in the TL response of the produced films were studied. The microstructural characterization of the films was accomplished through measures of scanning electronic microscopy and grazing incidence X-rays diffraction analysis. The dosimetric characterization was made of gamma radiation exposure in a {sup 60} Co source, with kerma from 0,1 to 500 Gy. Studies of reproducibility, homogeneity, stability and other environmental effects were also made. LiF and Cu F{sub 2}: LiF; Mg F{sub 2} films were the only ones that presented mechanical stability and reproducibility of the TL emission. There is a strong indication of some correlation between the residual tension fields inside the films and the intensity of its TL emission peaks. LiF monolayer films present supralinear behaviour from 0,2 to 100 Gy. These films present a main TL glow peak around 150 deg C, whose half-time is about 30 days. Its volumetric sensitivity can reach about 60 times that of LiF powder and about 0,25 that of TLD100 (LiF:Mg, Ti commercial dosimeter from Harshaw Chemical Co.) The homogeneity and reproducibility inside a same film batch is better than 12% for 95% confidence level. Cu F{sub 2} : LiF: Mg F{sub 2} films present linear behaviour from 3 to 500 Gy and its main TL glow peak around 200 deg C did not present any fading for a a period of 30 days, in laboratory conditions. This glow peak is characteristic of the Mg doping of LiF, which confirms the diffusion of Mg ions from the Mg F{sub 2} layer to the LiF layer. The TL volumetric sensitivity of these films is about four times that of LiF powder and about 1% that of TLD 100. The homogeneity and reproducibility inside a same film batch is better than 20% for 95% of confidence level. (author)

  15. Application of activation analysis for determination of some elements in cassiterite samples; Aplicacao da analise por ativacao para a determinacao de alguns elementos em amostras de cassiterita

    Energy Technology Data Exchange (ETDEWEB)

    Armelin, Maria Jose Aguirre

    1978-07-01

    This work consists in the development of an analytical method using activation by thermal neutrons for the determination of some minor elements and traces present in cassiterite (tin ore). This method was then applied to determine these elements in samples of cassiterite from different regions of Brazil. An analysis was made of the mineralogy characteristic of cassiterite as well as of the minerals most commonly associated with it. Four main types of interference were found to occur in the analysis by activation of trace elements in samples of cassiterite. The method involves the analysis without chemical separation for the determination of some elements and the analysis with chemical separation for the determination of other elements. The steps involved in both types of analysis are described. In the analysis with chemical separation the matrix element (tin) is separated by distillation in an H{sub 2}SO{sub 4}-HBr medium, after fusion of the ore with Na{sub 2}O{sub 2}. Arsine and antimony are determined in the distilled, whereas some lanthanide elements and uranium are determined in the distillation residue by separating them as a group by precipitation with lanthanum fluoride. A discussion on the precision, accuracy and sensibility of the method is also included. (author)

  16. Application of electron beam radiation for peat sterilization and suppression of microbe contaminants; Aplicacao da radiacao por feixe de eletrons como agente esterilizante de microorganismos em substrato turfoso

    Energy Technology Data Exchange (ETDEWEB)

    Tsai, David

    2006-07-01

    Inoculation of root nodule bacteria into legume seeds such as soybean [Glycine max. (L.)], common bean (Phaseolus vulgaris L.) and forage pasture has been effective and convenient as this simple procedure may introduce effective strains of Bradyrhizobium/Rhizobium into agricultural soils without a past history of successful cropping systems with the legume hosts. Peat-based substrates previously sterilized have been used for decades as bacteria carrier, protecting them from the prevailing harsh conditions in tropical soils and ensuring their survival with nutrient and protection against the soil antagonists. The Brazilian Government requires that all peat-based substrates must be gamma-sterilized from a cobalt-60 ({sup 60}Co) source, prior the introduction of the root nodule bacteria into the package. The recommendation is for a dose up to 50 kGy for an effective suppression of pathogens and saprophytes, in order to avoid competition among the substrate microbiota. Recently, the use of the electron beam (EB) accelerator has shown to be a new alternative for peat pre-sterilization, as this technique may promote reactive free-radicals which are efficient to suppress microbial contaminants. This fast technology is considered more environment and ecology friendly-sound than gamma radiation ({gamma}). The disadvantage of not reaching higher depth than gamma rays from {sup 60}Co must be considered, and attempts of optimizing the technique are crucial. This study compared both methods by using increasing rates of radiation by {sup 60}Co by the EB method - O, 10, 20, 30, 40 e 50 kGy in a commercial peat used for inoculants. Experimental data from days 7, 14, 21 and 28 days (growth period) and 150, 180 and 210 days (storage period) indicated high numbers of the strain Rhizobium tropici CM-01, labelled with gusA{sup +} (Study 1) and celB{sup +} (Study 2) from both eat-sterilizing techniques, reaching values above the minimum of 1x10{sup 8} cells g{sup -1} peat. At high rates, above 40 kGy, and after long incubation periods (ex. after 150 days), EB method was more efficient to suppress actinobacteria, one serious antagonist for rhizobia. Strain CM-01 celB{sup +}, data for the period of bacterial growth confirmed the efficiency of the method even at rates as low as 10 kGy. (author)

  17. Application of diagnosis and monitoring area contaminated by petroleum derivatives; Aplicacao da tecnica de caminhamento eletrico em area contaminada por derivados de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Cesar Augusto [Pos-graduacao em Geociencias em Meio Ambiente, IGCE - UNESP, Rio Claro, SP (Brazil)], E-mail: cesargeologia@yahoo.com.br; Dourado, Joao Carlos; Braga, Antonio Celso de Oliveira [Dept. de Geologia Aplicada, IGCE - UNESP, Rio Claro, SP (Brazil)], E-mails: jdourado@rc.unesp.br, acobraga@rc.unesp.br

    2006-07-15

    Geophysical methods are useful technic of geological investigation, thoroughly employed to diagnosis and monitoring contaminated areas, in conjunction with direct techniques of investigation such as chemical analyses. Among these, electric resistivity is more usually used in studies of contaminants in soil and groundwater, due to the high contrast of electric properties between the soil and the pollutant types frequently found, essentially constituted of composed organic and inorganic. Geophysical studies in impacted areas by petroleum products may be describe by anomalies of both low resistivity and high resistivities, confirmed as contaminant by chemical analyses. This apparent contradiction can reflect processes of degradation of the contaminants, directly associated with its residence time in the soil, through the generation of by-products that change the physical properties of the soil and groundwater, principally for the mineral dissolution by action of organic acids and by formation of minerals of oxides and hydroxides minerals. Natural attenuation defines a series of physical, chemical and biological processes that allow the degradation, dispersion and dilution of contaminants in a natural form, in other words, free from human intervention. This paper presents the application of electrical profiling technique in a contaminated industrial area for benzene, toluene, xylene, 1,2 dichloroethene and inorganic salts and it discusses the physical alterations of the contaminated soil through the obtained results, under the optics of the Natural Attenuation in course in the area of study. (author)

  18. Application of Monte Carlo method for dose calculation in thyroid follicle; Aplicacao de metodo Monte Carlo para calculos de dose em foliculos tiroideanos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Frank Sinatra Gomes da

    2008-02-15

    The Monte Carlo method is an important tool to simulate radioactive particles interaction with biologic medium. The principal advantage of the method when compared with deterministic methods is the ability to simulate a complex geometry. Several computational codes use the Monte Carlo method to simulate the particles transport and they have the capacity to simulate energy deposition in models of organs and/or tissues, as well models of cells of human body. Thus, the calculation of the absorbed dose to thyroid's follicles (compound of colloid and follicles' cells) have a fundamental importance to dosimetry, because these cells are radiosensitive due to ionizing radiation exposition, in particular, exposition due to radioisotopes of iodine, because a great amount of radioiodine may be released into the environment in case of a nuclear accidents. In this case, the goal of this work was use the code of particles transport MNCP4C to calculate absorbed doses in models of thyroid's follicles, for Auger electrons, internal conversion electrons and beta particles, by iodine-131 and short-lived iodines (131, 132, 133, 134 e 135), with diameters varying from 30 to 500 {mu}m. The results obtained from simulation with the MCNP4C code shown an average percentage of the 25% of total absorbed dose by colloid to iodine- 131 and 75% to short-lived iodine's. For follicular cells, this percentage was of 13% to iodine-131 and 87% to short-lived iodine's. The contributions from particles with low energies, like Auger and internal conversion electrons should not be neglected, to assessment the absorbed dose in cellular level. Agglomerative hierarchical clustering was used to compare doses obtained by codes MCNP4C, EPOTRAN, EGS4 and by deterministic methods. (author)

  19. Application of reject of gypsum from Trindade/PE in ceramic masses formulations; Aplicacao de residuos de gipsita em formulacoes de massas ceramicas

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Thalles Confessor de; Souza, Marcondes Mendes de; Almeida, Ana Beatriz Dantas de; Farias, Debora Santos Umbelino de; Nobrega, Luiz Felipe Pereira de Medeiros, E-mail: thallesconfessor@yahoo.com.br [Instituto Federal de Educacao, Ciencia e Tecnologia do Rio Grande do Norte (IFRN), Mossoro, RN (Brazil); Mendes, Luciana Bezerra [Fundacao de Apoio a Pesquisa do Rio Grande do Norte (FAPERN), Natal RN (Brazil)

    2016-07-01

    The mining industry is a major producer of waste is to be harmful to the environment besides not being made possible for use in producing means, since the product of economic interest has been extracted. In order to reduce this problem, this work shows the characterization of the waste generated by gypsum mining in Trindade/PE in the ceramic coating. The residue was collected, ground and sieved to #200, then was chemically characterized by XRF analysis process, to evaluate its potential to be incorporated into the formulation of ceramic material, the material studied can be used in porcelain tile formulation as a flux element for that were obtained in the laboratory ceramic bodies adding the residue then were performed physical testing of linear shrinkage, water absorption and flexural breaking strain technically order to evaluate the addition of this residue ceramic coating. (author)

  20. Gold nanoparticles applications in natural polymer modified for UV protection; Aplicacao de nanoparticulas de ouro em polimero natural modificado para protecao ultravioleta

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Iris O. da; Ladchumananandasivam, Rasiah; Nascimento, Jose H. O. do; Silva, Francisco C. da; Sa, Christiane S. de A., E-mail: iris.oliveira@gmail.com.br [Universidade Federal do Rio Grande do Norte (PPGEM/UFRN), Natal, RN (Brazil)

    2015-07-01

    The protein-based polymers such as milk, such as polylactic acid (PLA) and soya can be cited as examples of substrates used in various fields of engineering, mainly due to its character of biodegradability, generating low environmental impact when compared to chemical polymers to petroleum-based, which take years to decompose in nature. Among these, soy fiber has great application potential because it is a manufactured material base of a residue obtained from the existing folder in the soybean seeds after oil extraction, using resins and chemicals for structural modification. In this work, soy mesh was used to develop a material with ultraviolet protection properties, through the use of nanotechnology. Thus, to connect the gold nanoparticles (NPAu), the fabric had a surface charge modified with the use of chitosan, using 20% of the weight of the material, followed by nanomaterials exhaust process. The NPAu were synthesized via chemical synthesis with sodium nitrate as reducing and stabilizing agent. The analysis of the solution samples were evaluated by absorbance spectroscopy and solid materials through diffuse reflectance spectroscopy and XRD X-ray diffraction. The size of NPAu was evaluated in equipment Zetasizer nanoseries / nanoZ, finding nanoparticles with an average size of 34.59 nm, and also underlined plasmon resonance phenomenon, with peaks between 530 nm and red coloration, and good results from the soundness washes, compared to conventional dyeing. It was found that soy polymer treated with NPAu presented an excellent property with ultraviolet protection factor (UPF) of +50, considered excellent, proving its potential application in the biomedical field. (author)

  1. Analysis of ferritic stainless steel tube applied in radiation furnaces; Analise de tubos de aco inoxidavel ferritico para aplicacao em fornos de radiacao

    Energy Technology Data Exchange (ETDEWEB)

    Porto, P.C.R.; Spim, J.A. [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Centro de Tecnologia. Lab. de Fundicao], e-mail: spim@ufrgs.br; Santos, C.A. [Pontificia Universidade Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil). Fac. de Engenharia. Programa de Pos-Graduacao em Engenharia e Tecnologia de Materiais (PGETEMA)

    2006-07-01

    The objective of this work was to evaluate the change in mechanic properties and phase transformations of ferritic stainless steel tube, ASTM 268 Gr 446, applied in high temperature conditions. The work has used tubes from radiation furnaces of the PETROBRAS Xisto Industrialization Unit. The samples used for comparison were obtained from new tubes and tubes already used in furnaces. The test analyses were optical metallography, scanning electron microscopy, energy dispersive spectrometer, hardness and microhardness test and tension test. Results have shown that the new tubes presented a ferritic matrix and in old tubes were observed a great quantity of sigma phase and carbides. Along with the thickness of the tubes it was verified that the inside region presented an increase of sulfate and the outside region an increase of carbides. (author)

  2. Synthesis of calcium aluminate with silicon addition for application in biomaterials; Sintese de aluminato de calcio com adicao de prata para aplicacao em biomateriais

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, P.J.; Almeida, L.H.S.; Pappen, F.G.; Ribeiro, A.S.; Cava, S.S. [Universidade Federal de Pelotas (UFPel), RS (Brazil); Veiga, F.C.T.; Jurado, J., E-mail: ati_jg@hotmail.com [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil)

    2016-07-01

    Ceramic materials have biocompatibility have been studied, researched and applied in various treatments such as endodontics and orthopedics. This study aims to carry out the synthesis by the polymeric precursor method for post calcium trialuminato (C3A) and with addition of 1% and 5% silver, them the powders were calcined in de temperature 1000°C, carried out a comparative study between them. The ceramic powders were characterized by X-ray diffraction, having a phase composition, scanning electron microscopy (SEM) associated with EDS observed grain morphology and quantity of the chemical elements. The analysis flow, pH, release of calcium ions (Ca{sup 2+}) and silver ions (Ag{sup +}) were evaluated with the sealer MTA Fillapex result that calcium aluminate addition of silver improved the MTA Fillapex stream with the release of ions Ca{sup +2}, being a material that allows applications in the field of endodontics. (author)

  3. Study of virtual reality application in training programs on nuclear technology; Estudo da aplicacao de realidade virtual em programas de treinamento sobre tecnologia nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Pastura, Valeria da Fonseca e Silva

    2016-07-01

    The activities developed in the units which organize the National Nuclear Energy Commission (CNEN) are present in various sectors of the Brazilian society, being them in medicine, industry, electricity generation, mining, and among the others. Based on the assumption that the employees are CNEN's mayor differential and the training programs play an important role in the process of organizational development, because they align the professionals with the strategies of the institution properly. Focusing on these matters, this master's thesis aimed to evaluate the training programs which are applied by CNEN, in order to propose and evaluate the use of the Virtual Reality (VR) expertise as a new method to be applied in the training programs. To accomplish this purpose, we performed two methodological approaches through questionnaires. And from the analysis of the results obtained, we could realize that there was no efficient training program which is systematically applied by CNEN, and the use of the RV technique improves the training programs in the understanding of themes whose assimilation is challengeable, such as those related to nuclear power. In this sense, for a better functional performance, the training programs adopted by CNEN must be structured so as to enable the development of each server's skills as well as abilities and, it is actually hoped that the virtual reality tools could be inserted in these programs to pursue only this purpose. (author)

  4. Magnetic nanoparticles for cancer therapy; Nanoparticulas magneticas para o tratamento do cancer

    Energy Technology Data Exchange (ETDEWEB)

    Bakuzis, Andris F. [Universidade Federal de Goias (UFG), Goiania, GO (Brazil). Instituto de Fisica

    2014-07-01

    Full text: Magnetic nanoparticles have been used in several biomedical applications, spanning from cell separation, early diagnosis of metastasis to even the treatment of cancer via magnetic hyperthermia (MH). This last technique consists in the increase of temperature of nanoparticles when their magnetic moments interact with a magnetic alternating field. This effect has been suggested as an innovative therapy to cancer treatment, due to the delivery of heat or therapeutic agents, such as drugs, genes, and others. In addition, several clinical studies has demonstrated synergetic effects between hyperthermia and radiotherapy [1]. This indicates a great therapeutic potential for this noninvasive and targeted technique. In this talk we will discuss results from the literature and from our own group in the treatment of cancer via magnetic hyperthermia. Several types of magnetic nanoparticles suggested for this application will be discussed, as well as the historical evolution of this procedure, which although suggested in the late 50' only recently was approved in Europe for treatment of humans with brain tumors. (author) [Portuguese] Full text: Nanoparticulas magneticas tem sido utilizadas em diversas aplicacoes biomedicas, desde a separacao de celulas, marcacao de celulas-tronco, diagnostico precoce de metastases ao tratamento do cancer via hipertermia magnetica (HM). Esta ultima tecnica consiste no aumento da temperatura de nanoparticulas quando seus momentos magneticos interagem de forma adequada com um campo magnetico alternado. Este efeito tem sido idealizado como uma nova terapia para o tratamento do cancro, seja via entrega seletiva de calor ou mesmo pela liberacao de farmacos, genes ou outros agentes terapeuticos por meio desta acao externa. Adicionalmente, diversos estudos clinicos tem demonstrado efeitos sinergicos entre a hipertermia e tecnicas tradicionais de tratamento oncologico, como quimioterapia e radioterapia. Isto indica um forte potencial

  5. Effects on the work of a direct ethanol fuel cell as function of compacting force applied to the cell; Efeitos no funcionamento de uma celula a combustivel com alimentacao direta de etanol (CCADE) em funcao da forca de compactacao aplicada a celula

    Energy Technology Data Exchange (ETDEWEB)

    Belchior, P.M.; Forte, M.M.C. [UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil); Serafin, R.; Fusiger, V.; Carpenter, D. [FURB - Fundacao Universidade Regional de Blumenau, SC (Brazil)

    2010-07-01

    This experiment aimed to verify the influence due to the variation of the compacting force applied to a DEFC. According to the tests, as the increase of cell compacting, the performance improves significantly. According applied tests, when the high electrical conductivity components are used, small differences of the cell compacting can generate a large difference on the total ohmic resistance. Through the tests one can conclude that with the increase of cell compacting, the contact probably increase among the distribution of reagents and the diffuser layer, improving the cell performance. (author)

  6. GPU-Accelerated Optical Coherence Tomography Signal Processing and Visualization

    Science.gov (United States)

    Darbrazi, Seyed Hamid Hosseiny

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  7. Particulate matter and polycyclic aromatic hydrocarbons from forest fires: impacts on air quality and occupational risks assessment

    Science.gov (United States)

    Oliveira, Marta Madalena Marques de

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  8. Single Point Incremental Forming and Multi-Stage Incremental Forming on Aluminium Alloy 1050

    Science.gov (United States)

    Suriyaprakan, Premika

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  9. Impact evaluation of the large scale integration of electric vehicles in the security of supply

    Science.gov (United States)

    Bremermann, Leonardo Elizeire

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  10. Analysis of vegetation dynamics using time-series vegetation index data from Earth observation satellites

    Science.gov (United States)

    Rodrigues, Arlete da Silva

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  11. Stellar activity in high-precision photometric and spectroscopic transit observations

    Science.gov (United States)

    Oshagh, Mahmoudreza

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  12. Birefringence and Bragg grating control in femtosecond laser written optical circuits

    Science.gov (United States)

    Fernandes, Luis A.

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  13. Viscoelastic nanocapsules under flow in microdevices

    Science.gov (United States)

    Cordeiro, Ana Lucinda Teixeira

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  14. Starch and polyethylene based bone-analogue composite biomaterials

    Science.gov (United States)

    Reis, Rui Luis Goncalves dos

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  15. Seismic assessment of reinforced concrete frame structures with a new flexibility based element

    Science.gov (United States)

    Arede, Antonio Jose Coelho Dias

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  16. Reciprocal interaction between human microvascular endothelial cells and mesenchymal stem cells on macroporous granules of nanostructured-hydroxyapatite agglomerates

    Science.gov (United States)

    Laranjeira, Marta de Sousa

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  17. Biological effects of polyacrylic acid-coated and non-coated superparamagnetic iron oxide nanoparticles in in vitro and in vivo experimental models

    Science.gov (United States)

    Couto, Diana Manuel Mocho de Bastos

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  18. Albumin and fibronectin adsorption and osteoblast adhesion on titanium oxides

    Science.gov (United States)

    Freitas, Susana Maria Ribeiro e. Sousa Mendes de

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  19. Improving the characteristics of foundry alloys AlSiCuMg during manufacturing

    Science.gov (United States)

    Fragoso, Bruno Filipe Marques

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  20. Magnetism at the nanoscale: Nanoparticles, nanowires, nanotubes and their ordered arrays

    Science.gov (United States)

    Proenca, Mariana Jesus Paiva

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  1. Clinopyroxene based glasses and glass-ceramics for functional applications

    Science.gov (United States)

    Goel, Ashutosh

    As piroxenas sao um vasto grupo de silicatos minerais encontrados em muitas rochas igneas e metamorficas. Na sua forma mais simples, estes silicatos sao constituidas por cadeias de SiO3 ligando grupos tetrahedricos de SiO4. A formula quimica geral das piroxenas e M2M1T2O6, onde M2 se refere a catioes geralmente em uma coordenacao octaedrica distorcida (Mg2+, Fe2+, Mn2+, Li+, Ca2+, Na+), M1 refere-se a catioes numa coordenacao octaedrica regular (Al3+, Fe3+, Ti4+, Cr3+, V3+, Ti3+, Zr4+, Sc3+, Zn2+, Mg2+, Fe2+, Mn2+), e T a catioes em coordenacao tetrahedrica (Si4+, Al3+, Fe3+). As piroxenas com estrutura monoclinica sao designadas de clinopiroxenes. A estabilidade das clinopyroxenes num espectro de composicoes quimicas amplo, em conjugacao com a possibilidade de ajustar as suas propriedades fisicas e quimicas e a durabilidade quimica, tem gerado um interesse mundial devido a suas aplicacoes em ciencia e tecnologia de materiais. Este trabalho trata do desenvolvimento de vidros e de vitro-cerâmicos baseadas de clinopiroxenas para aplicacoes funcionais. O estudo teve objectivos cientificos e tecnologicos; nomeadamente, adquirir conhecimentos fundamentais sobre a formacao de fases cristalinas e solucoes solidas em determinados sistemas vitro-cerâmicos, e avaliar a viabilidade de aplicacao dos novos materiais em diferentes areas tecnologicas, com especial enfase sobre a selagem em celulas de combustivel de oxido solido (SOFC). Com este intuito, prepararam-se varios vidros e materiais vitro-cerâmicos ao longo das juntas Enstatite (MgSiO3) - diopsidio (CaMgSi2O6) e diopsidio (CaMgSi2O6) - Ca - Tschermak (CaAlSi2O6), os quais foram caracterizados atraves de um vasto leque de tecnicas. Todos os vidros foram preparados por fusao-arrefecimento enquanto os vitro-cerâmicos foram obtidos quer por sinterizacao e cristalizacao de fritas, quer por nucleacao e cristalizacao de vidros monoliticos. Estudaram-se ainda os efeitos de varias substituicoes ionicas em composicoes de

  2. Gingival healing after gingivectomy procedure and low intensity laser irradiation. A clinical and biometrical study in anima nobile; Reparacao gengival apos a tecnica de gengivectomia e aplicacao de laser em baixa intensidade. Avaliacao clinica e biometrica em humanos

    Energy Technology Data Exchange (ETDEWEB)

    Amorim, Jose Claudio Faria

    2001-07-01

    For the present study seven patients presenting periodontal disease were selected in a way that they required the performance of gingivectomy procedure in the region of premolars in both sides, being this in the upper or lower region. After the surgical procedure one side was submitted to low intensity laser radiation, wavelength 685 nm, power 50 mW and fluency of 4J/cm{sup 2}, contact mode. The other side was used as a control, not receiving any laser irradiation. Healing process for both sides, was clinically and biometrically evaluated and compared using photographs for the periods: pre-operative, immediate post-operative, 3, 7,14,21, 28 and 35 days. The analysis was performed by 3 specialists in Periodontology considering aspects of healing. Results were submitted to statistical analysis. Biometrical evaluation showed improvement of healing for the period of 21 and 28 days in the lased group. Clinical evaluation showed better reparation mainly after the third day for the active group. Laser group was considered to present an improved healing when compared to the control group. (author)

  3. Evaluation of sensitivity evaluation of a contamination monitor for use in monitoring of internal exposure of workers in nuclear medicine; Avaliacao da sensibilidade de um monitor de contaminacao para aplicacao em monitoracao da exposicao interna de trabalhadores em medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Dantas, Bernando Maranhao; Assis, Janima Cruz de; Oliveira, Salomao Marques de; Dantas, Ana Leticia Almeida, E-mail: bmdantas@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. de Monitoracao In Vivo. Div. de Dosimetria

    2014-07-01

    In practice of nuclear medicine, expert personnel routinely handle radiopharmaceuticals for diagnosis and radiotherapy. The control of intakes of radionuclides by workers can be performed through internal dosimetry techniques, as an integral part of the radiation protection program of the installation. The use of radiopharmaceuticals for diagnostic and therapeutic purposes in vivo and in vitro in Brazil is regulated by CNEN-NE Standards and 3:05 CNEN-NN 3.01. The International Atomic Energy Agency (IAEA) recommends the establishment of an internal monitoring program on workers, especially those subject to possible exposure to annual effective doses greater than 1 mSv. Note that, currently, in Brazil, are not available qualified laboratories to provide internal monitoring services in all regions in the country, if it were applied by CNEN, the requirement for internal monitoring of workers. This paper presents the development of a simple and low-cost methodology for in vivo monitoring of {sup 131}I in the thyroid. The proposed methodology is the use of portable monitor of surface contamination, equipment available and routinely used in all nuclear medicine services in Brazil. The monitor is calibrated with neck-thyroid simulator developed at the Laboratory of In Vivo Monitoring of IRD/CNEN-RJ. The equipment tested is suitable for application in in vivo occupational monitoring thyroid. This conclusion is based on the fact that the detection system has sufficient sensitivity for monitoring up to seven days after the incorporation of the radionuclide and guarantees {sup 131}I detection in values that result in effective doses below 1 mSv for the exposure scenarios adopted.

  4. Performance of direct ethanol fuel cells as function of using of compressed air; Desempenho de celulas a combustivel com alimentacao direta de etanol em funcao do uso de ar comprimido

    Energy Technology Data Exchange (ETDEWEB)

    Belchor, P.M. [UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil); Berns, B.A.; Ferreira, R.C.; Goldbach, A.; Carpenter, D. [FURB - Fundacao Universidade Regional de Blumenau, Blumenau, SC (Brazil)

    2010-07-01

    This paper compared the performance of a direct ethanol fuel cell (CCADE) cathode feeding with air replacing the pure oxygen. The results have shown that the small decreasing of the yield of the cell under both practical and experimental situations, by the use of air replacing pure oxygen, it completely acceptable as function of great diminishing of operational costs. (author)

  5. Synthesis of precursor the base of indene for polyelectrolyte an membrane production for application in fuel cell; Sintese de precursores a base de indeno para producao de polieletrolitos e membranas para uso em celula a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Brum, F.J.B.; Laux, F.N.; Haack, M.S.; Forte, M.M.C. [Universidade Federal do Rio Grande do Sul. Escola de Engenharia, Porto Alegre, RS (Brazil)

    2010-07-01

    Monomers with vinyl bond can be polymerized via a cationic mechanism using acid catalysts. This study aimed to obtain homo and copolymers of styrene and indene via cationic mechanism and the functionalization of sulfonic groups to the production of membranes for fuel cells. Polymers and poly electrolytes were characterized by infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and gel permeation chromatography (GPC/SEC). The degree of sulfonation of the polymers was determined by titration and evaluated for these films to the degree of swelling in water, ion exchange capacity and analysis of electrochemical impedance spectroscopy. Membranes prepared with polyindene and PVA were tested in an apparatus of the fuel cell. (author)

  6. Synthesis of modified calcium aluminate with lanthanum manganite (LSM) for possible use in solid oxide fuel cell (SOFC); Sintese de aluminato de calcio modificado com manganita de lantanio (LSM) para possivel utilizacao em celula combustivel de oxido solido (SOFC)

    Energy Technology Data Exchange (ETDEWEB)

    Veiga, F.C.T.; Jurado, J.; Sousa, V.C. de, E-mail: faili.cintia@gmail.com [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Escola de Engenharia. Departamento de Materiais; Cava, S.S. [Universidade Federal de Pelotas, RS (Brazil)

    2016-07-01

    The fuel cells solid oxide (SOFC) is made up of three basic elements: two electrodes, the anode and cathode and a conductive electrolyte ions. The objective of this work consists of calcium aluminate synthesis modified LSM in a 1: 1 by combustion synthesis method with a view to its use as a cathode in SOFC. The characterization of the post was carried out by the methods of XRD, TEM and EIS. After heat treatment at 1200°C/4 hours it was possible to obtain Ca0.5Sr1.5MnO4 and CaMnO2.56 phases. The material showed a semiconductor characteristics because with increasing temperature the electrical resistance value tends to decrease obtaining electrical conductivity greater than 10-6S / cm featuring an extrinsic semiconductor with an activation energy of 0.12. Therefore, with an activation energy value within the range of materials used for a SOFC cathodes. (author)

  7. Development of solar cells with back surface field made by aluminum paste and belt furnace diffusion; Desenvolvimento de celulas solares com campo retrodifusor formado por pasta de aluminio e difusao em forno de esteira

    Energy Technology Data Exchange (ETDEWEB)

    Marcolino, Juliane Bernardes

    2011-01-15

    Photovoltaics is based on the direct conversion of solar energy into electricity and is a promising alternative to diversify the world's energy matrix. This work aims to develop and analyse the deposition of Al paste by screen printing and firing/diffusion in a belt furnace to produce a BSF region in monocrystalline Si wafers. The diffusion of Al into the substrate was implemented by two different processes. In the first process the diffusion/firing of the Al paste and the firing of the Ag paste was carried out in independent steps. In this case, solar cells with an average efficiency ({eta}{sub average}) of 11.5 % and a maximum of 12.0 % were produced, but with the formation Al clusters in the back surface of the devices. In the second process firing/diffusion of such pastes was done on the same step. In this case, the best results were obtained for a firing/diffusion temperature of 860 deg C and belt furnace speed (V{sub E}) of 150 cm/min and also for 890 deg C and 180 cm/min. For the former parameters, {eta}{sub average} was 12.4 % and the maximum was 12.8 %. For the later, {eta}{sub average} was 12.5 % and the maximum was 12.6 %. Considering a temperature of 900 deg C and V{sub E} of 190 cm/min, {eta}{sub average} was 12.4 %. It was observed that minority carriers diffusion lengths were smaller than the thickness of silicon wafers. Open circuit voltages were 30 mV lower than that from similar cells fabricated at NT-Solar by using high purity Al deposited by e-beam evaporation indicating that the developed process produced low quality BSF. (author)

  8. In vitro study of the effects of radio frequency generated for plasma in neoplastic cells HT-29; Estudo in vitro dos efeitos da radiofrequencia gerada por plasmas em celulas neoplasicas HT-29

    Energy Technology Data Exchange (ETDEWEB)

    Andrighetto, Daniela; Dornelles, Eduardo Bortoluzzi; Cruz, Ivana Beatrice Manica da; Lüdke, Everton, E-mail: daniela.andrighetto@hotmail.com, E-mail: dornellesedu@gmail.com, E-mail: ibmcruz@hotmail.com, E-mail: evertonludke@gmail.com [Universidade Federal de Santa Maria (UFSM), RS (BRazil)

    2014-07-01

    The goal of this study is to develop an in vitro irradiation cell system with controllable irradiation intensities of 27 MHz produced by an argon plasma column with variable amplitude modulation in the 100-700 kHz range. This paper presents and discusses a proposed experiment, with toxicity analysis (DNA Picogreen®) and cell viability (MTT assay) in the radiation-induced HT-29 cell line (colon adenocarcinoma). The data allow us to observe that cellular toxicity effects may occur with exposure to fields produced by argon plasma with intensities on the order of at least 3.2 W / cm2 and exposure times above 3.5 hours continuously. An analysis of cell populations for cell toxicity tests using the Student's t-test did not show significant changes (p <0.05) in the amount of DNA released by the action of radiofrequency, although it has been found that cell viability (MTT) is not significantly altered by long exposures to radiation induced plasma RF signals in 27 MHz (p> 0.34). Cytotoxic effects due to the destruction of cell wall by heating the samples were not detected in any of the tests.

  9. Development of materials for use in solid oxid fuel cells anodes using renewable fuels in direct operation; Desenvolvimento de materiais ceramicos aplicados em anodos de celulas a combustivel de oxidos solidos para operacao direta com combustiveis renovaveis

    Energy Technology Data Exchange (ETDEWEB)

    Lima, D.B.P.L. de [Instituto Federal do Parana (IFPR), PR (Brazil); Florio, D.Z. de; Bezerra, M.E.O., E-mail: daniela.bianchi@ifpr.edu.br [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)

    2016-07-01

    Fuel cells produce electrical current from the electrochemical combustion of a gas or liquid (H2, CH4, C2H5OH, CH3OH, etc.) inserted into the anode cell. An important class of fuel cells is the SOFC (Solid Oxide Cell Fuel). It has a ceramic electrolyte that transports protons (H +) or O-2 ions and operating at high temperatures (500-1000 °C) and mixed conductive electrodes (ionic and electronic) ceramics or cermets. This work aims to develop anodes for fuel cells of solid oxide (SOFC) in order to direct operations with renewable fuels and strategic for the country (such as bioethanol and biogas). In this context, it becomes important to study in relation to the ceramic materials, especially those that must be used in high temperatures. Some types of double perovskites such as Sr2MgMoO6 (or simply SMMO) have been used as anodes in SOFC. In this study were synthesized by the polymeric precursor method, analyzed and characterized different ceramic samples of families SMMO, doped with Nb, this is: Sr2 (MgMo)1-xNbxO6 with 0 ≤ x ≤ 0.2. The materials produced were characterized by various techniques such as, thermal analysis, X-ray diffraction and scanning electron microscopy, and electrical properties determined by dc and ac measurements in a wide range of temperature, frequency and partial pressure of oxygen. The results of this work will contribute to a better understanding of advanced ceramic properties with mixed driving (electronic and ionic) and contribute to the advancement of SOFC technology operating directly with renewable fuels. (author)

  10. Optimization by simulation and development of solar cells with aluminium paste rear emitter and diffusion in conveyor furnace; Otimizacao por simulacao e desenvolvimento de celulas solares com emissor posterior formado por pasta de aluminio e difusao em forno de esteira

    Energy Technology Data Exchange (ETDEWEB)

    Mallmann, Ana Paula

    2011-01-15

    Photovoltaic solar energy is the direct conversion of solar energy into electricity and it has low impact to the environment during electric energy production. The main device of this technology is the solar cell and silicon is the substrate most used. The solar cells are electrically connected and encapsulated in order to form the photovoltaic module. The aims of this thesis are to optimize, develop and to analyse n{sup +}np{sup +} solar cells processed in n type Si-PV-FZ and with aluminum rear emitter formed in belt furnace. The optimization of solar cells by simulation is an important step before the device development. The software PC-1D and another program developed using Visual Basic language were used. Considering a metal grid formed by evaporation technique in vacuum ambient an efficiency of 16.8 % may be achieved. With screen printed grid, 15.8 % efficient solar cells were obtained. From the simulation results it was found that the screen printing metallization may become more viable than evaporation technique because there is low difference in the efficiency and the screen printing is a simpler technique. The experimental optimization of silicon wafers texture process resulted in reflectance of 12 %. This value is typical for monocrystalline silicon with textured surface. Experimental optimization of phosphorus front surface field shows a sheet resistance of (36 {+-} 4) {omega}/ for this region. This region was formed in a thermal step in a conventional furnace with POCl{sub 3}. It was found that after the phosphorus diffusion occurred gettering to specific temperature and time. It was verified that the minority carrier lifetime in the final of processing is similar to the initial value. The influence of steps sequence of front silver paste firing and rear diffusion/firing aluminium paste, of surface passivation and the influence of dry air flow during the aluminium paste diffusion/firing, of aluminium paste diffusion/firing temperature and of belt speed under the fabricated devices electric characteristics were analysed. The aluminum rear emitter n{sup +}np{sup +} silicon solar cells resulted in 29 efficiency up to 9,5 %. The best solar cells were processed under 900 deg C to aluminium paste diffusion/firing and belt speed of 140 cm/min. The efficiency is limited by low values of V{sub OC} and FF reached. It was also verified that the local rear emitter formation results in solar cells with higher efficiency than those with homogeneous emitter. (author)

  11. Materiais a base de oxidos com estrutura do tipo perovskite e compositos como anodos de PCES: Propriedades Funcionais e Comportamento Eletroquimico em Celulas com Eletrolitos Solidos a Base de Galatos e Silicatos

    Science.gov (United States)

    Kolotygin, Vladislav

    This work was focused on the analysis of transport, thermomechanical and electrochemical properties of a series of perovskite-like oxide materials and composites for potential applications as anodes of intermediate-temperature solid oxide fuel cells (SOFCs) with lanthanum gallate and silicate solid electrolytes. The primary attention was centered on A(Mn,Nb)O3-delta (A = Sr, Ca) and (La,Sr)(Mn,Ti)O3-based systems, lanthanum chromite substituted with acceptor-type and variable-valence cations, and various Ni-containing cermets. Emphasis was given to phase stability of the materials, their crystal structure, microstructure of porous electrode layers and dense ceramics, electronic conductivity, Seebeck coefficient, oxygen permeability, thermal and chemical induced expansion, and anodic overpotentials of the electrodes deposited onto (La,Sr)(Ga,Mg)O3- and La10(Si,Al)6O27-based electrolyte membranes. In selected cases, roles of oxygen diffusivity, states of the transition metal cations relevant for the electronic transport, catalytically active additives and doped ceria protective interlayers introduced in the model electrochemical cells were assessed. The correlations between transport properties of the electrode materials and electrochemical behavior of porous electrodes showed that the principal factors governing anode performance include, in particular, electronic conduction of the anode compositions and cation interdiffusion between the electrodes and solid electrolytes. The latter is critically important for the silicatebased electrolyte membranes, leading to substantially worse anode properties compared to the electrochemical cells with lanthanum gallate solid electrolyte. The results made it possible to select several anode compositions exhibiting lower area-specific electrode resistivity compared to known analogues, such as (La,Sr)(Cr,Mn)O3-delta.

  12. Effect of the combined action of gamma radiation and static fields in human cells;Efeito da acao combinada de radiacao gama e campo eletrico estatico em celulas humanas

    Energy Technology Data Exchange (ETDEWEB)

    Moron, Michelle Mendes

    2008-07-01

    Our goal is the study in human cells of the effect resulting from the association of irradiation with exposure to exogenous static electric fields. The T47D cell line of breast cancer cells was irradiated with gammas in the 0 8 Gy doses range. The viability of this T47D cells exposed to both gamma radiation and 1.250 V/cm static electric field (SEF) was about 12% lower than when only irradiated. The sole exposure of the cells to SEF by 24 and 72 hours did not induce toxicity. Immunofluorescence runs carried out in irradiated normal MRC5 cell line of human lung fibroblast have quantified the expression of the g-H2AX histone. The amount of phosphorylated histones was approximately 40% higher after irradiation with 2 Gy plus exposure to a SEF by 1 hour, showing that the electric field negatively interfered in the repairing process of the DNA double strand breaks. The flow cytometry analysis with FACS showed that in T47D cells treated with 1 and 2 Gy by 24 hours the SEF also negatively interfered in the DNA repairing process, as evidenced by the higher accumulation of cells in the S phase. (author)

  13. Absence of genotoxic activity from milk and water boiled in microwave oven in somatic cells from Drosophila melanogaster; Ausencia da atividade genotoxica do leite e agua, fervidos com microondas, em celulas somaticas de Drosophila melanogaster

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Cristina das Dores. E-mail: crisddias@yahoo.com.br

    2003-07-01

    This paper reports an experiment for evaluation of the possible genotoxic effects of food prepared in a microwave oven, through the mutation test and somatic recombination, in wings of Drosophila melanogaster. Two crossing have been performed: a standard cross-ST and a high bioactivation cross - HB resulting in marked trans -heterozygote descendents (MH) and balanced heterozygotes (BH). The 72 hours larvas were fed with water and milk boiled both in the microwave oven and in the traditional way. The MH individual wings were analyzed, where the spots can be induced either by mutation or mitotic recombination. The experiment presented negative results related to the genotoxic effects of the water and milk boiled using the microwave oven, in MH descendents of both crossing. Therefore, under these experimental conditions, genotoxic activity were not presented by milk and water boiled in the microwave oven. However, an extensive study using different techniques is necessary to investigate the action of the food prepared in the microwave oven on the genetic material.

  14. Study of the combined action of gamma radiation and static electric fields in human cells; Estudo da acao combinada de radiacao gama e campo eletrico estatico em celulas humanas

    Energy Technology Data Exchange (ETDEWEB)

    Moron, Michelle Mendes

    2008-07-01

    The basic principle of radiotherapy is the one of maximizing damage to the tumor, while minimizing it in neighboring health tissues. Several strategies have been worked out aiming at increasing cellular radiosensitivity, and among them is the use of exogenous fields. Our goal in this work is the study in human cells of the effect resulting from the association of irradiation with exposure to exogenous static electric fields. The T47D cell line of breast cancer cells was irradiated with gammas in the 0 - 8 Gy doses range. The corresponding survival curve provided information on the radiosensitivity of this cell line. The rate of cell deaths per Gray in the 0 - 8 Gy range exhibited a maximum at 2 Gy, which corresponds to the most efficient irradiation dose. The viability of this T47D cells exposed to both gamma radiation and 1.250 V/cm static electric field (SEF) was about 12% lower than when only irradiated. The sole exposure of the cells to SEF by 24 and 72 hours didn't induce toxicity. Immunofluorescence runs carried out in irradiated normal MRC5 cell line of human lung fibroblast, without and with exposition to a SEF, have quantified the expression of the y- H2AX histone. The amount of phosphorylated histones was approximately 40% higher after irradiation with 2 Gy plus exposure to a SEF by 1 hour, showing that the electric field negatively interfered in the repairing process of the DNA double strand breaks. The flow cytometry analysis with FACS allowed the investigation of a possible interference of radiation and SEF in the cell distributions among the cellular cycle phases. It was found that in T47D cells treated with 1 and 2 Gy by 24 hours the SEF also negatively interfered in the DNA repairing process, as evidenced by the higher accumulation of cells in the S phase. Therefore, it would be possible to conclude that static and exogenous electric fields are able of negatively interfering in the cellular repair and, presumably, in DNA repair. (author)

  15. Acid membranes of poly(vinyl alcohol) for direct ethanol fuel cell applications; Membranes acidas de poli(alcool vinilico) para aplicacoes em celulas a combustivel via etanol direto

    Energy Technology Data Exchange (ETDEWEB)

    Dutra Filho, Jose C.; Gomes, Ailton S. [Instituto de Macromoleculas Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, RJ (Brazil)], e-mail: asgomes@ima.ufrj.br

    2011-07-01

    Proton-conducting hybrid membranes composed of poly(vinyl alcohol) (PVA), phosphotungstic acid (HPW) and diethylenetriaminepentaacetic acid (DTPA) where prepared. The effect of HPW doping and crosslink with DTPA on the membranes properties such as uptake, pervaporation and proton conductivity was investigated. Uptake and permeated flux decreases with increasing content of HPW and DTPA. Ethanol permeabilities obtained was about two orders of magnitude smaller than Nafion 117. FTIR spectra indicated that HPW was incorporated into the polymer matrix and DTPA acted as crosslink agent. The proton conductivity was in the order of 10-3 S.cm-1 with added 4 wt.% of DTPA and generally increases with the addition of HPW. (author)

  16. Low power laser effects in cancer cells and fibroblasts submitted the ionizing radiation; Efeitos do laser de baixa potencia em celulas de linhagem tumoral e fibroblastos submetidos a radiacao ionizante

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Camila Ramos

    2015-07-01

    Cancer is considered a public health problem worldwide. According to Brazil's the National Cancer Institute (INCA), 576,000 new cases of cancer were estimated for 2015 in Brazil, representing the second leading cause of death. Radiotherapy may be a treatment to several of types of cancer, frequently using ionizing radiation to eradicate or prevent the proliferation of tumor cells. This treatment, however, can lead to death of non-tumor cells around in irradiated tissue. Given this, adjuvant therapies that can minimize the side effects of ionizing radiation are of extremely importance. In this context, low power laser (LPL) may be an alternative to modulate the response of healthy cells to ionizing radiation. In this study, cells of human gingival fibroblasts (FMM1) and breast cancer (MDAMB- 231) were exposed to gamma radiation at doses of 2.5 and 10 Gy. After twenty-four hours, cell were irradiated with LPL ( λ= 660 nm, 40 mW and total area of 0.04 cm²) with energy densities of 30, 60, 90, 120 and 150 J/cm². The cell viability was measured during four days, using the trypan blue technique. The influence of LPL on the cell cycle and on expression of the nuclear antigen of cellular proliferation (PCNA) was evaluated by flow cytometry. The expression of β-Galactosidase was the chosen method to assess cell senescence. Considering our adopted parameters, and focusing on the non-tumor cells, we have observed an increase in: 1) cell viability; 2) cell population in phases S and G{sub 2}/M cell cycle; 3) PCNA expression with decrease in senescence. No alterations were observed in the cell viability, with greater population in phases S and G{sub 2}/M cell cycle, while the number of senescent cells and the expression of PCNA were decreased. Therefore, we have concluded that the LPL promoted effects on both cell lineages, with increased cell viability on FMM1 cells, whether cancer cells maintained a decreased proliferation. (author)

  17. Hydrogen production through allothermal ethanol reforming for fuel cells application: first generation prototype; Producao de hidrogenio atraves da reforma-vapor do etanol para aplicacoes em celulas a combustivel: prototipo de primeira geracao

    Energy Technology Data Exchange (ETDEWEB)

    Marin Neto, Antonio Jose; Silva, Ennio Peres da; Camargo, Joao Carlos; Neves Junior, Newton Pimenta; Pinto, Cristiano da Silva [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Lab. de Hidrogenio; Pinto, Cristiano da Silva [Centro Nacional de Referencia em Energia do Hidrogenio, Campinas, SP (Brazil)

    2004-07-01

    This paper describes preliminary results obtained with the allothermal ethanol reforming system for synthesis gas (syn-gas) production and hydrogen upgrading and purification for fuel cell applications. The system was designed to supply hydrogen to a 500 W PEM (Proton Exchange Membrane) fuel cell, with an electrical efficiency of 45%, which requires approximately 0.45 m3.h-1 of hydrogen, with a maximum carbon monoxide concentration of 20 {mu}mol.mol-1 (ppm). The study was performed changing the operation temperature and analyzing the resulting syn-gas through gas chromatography for a specific catalyst. This catalyst was tested up to 700 deg C, 1 bar and fixed stoichiometric steam to carbon ratio. The syn-gas, before carbon monoxide shift reactor implementation, was submitted to a two-bed-three-segments purification step composed of chemical and physical molecular sieves for hydrogen purification. The carbon monoxide shift reactor (water gas shift reactor) is under development to improve the efficiency-to-hydrogen and maximize the life of the purification bed. The final results also include a discussion about possible reactions involved in ethanol steam-reforming for such catalyst. (author)

  18. Study on the performance of Nafion 212 membrane in polymeric electrolyte fuel cells operating with air; Estudo do desempenho da membrana de Nafion 212 em celulas a combustivel de eletrolito polimerico operando com ar

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Adriano C.; Ticianelli, Edson Antonio [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Inst. de Quimica]. E-mail: edsont@iqsc.usp.br

    2008-07-01

    The operational characteristics of the Nafion 212 membrane (N212) were investigated and compared to the Nafion 112 membrane (N112), both 50 thick, in polymer electrolyte fuel cell (PEFC). The polarization measurements were performed changing the cell and gases humidification temperature and the gases pressure. The kinetic parameters obtained from the polarization curve proved that the cell with membrane N212 showed better performance than membrane N112, when they operating with air at cathode. The electrochemical impedance studies were carried out to make clear the polarization phenomena due to the resistive and diffusive effects that limit the cell performance. At high frequency region is found an arc, which dimension in depends on the current density, whereas at the mid frequency region we can find two loops with different characteristics and both dependent of current density. This behavior becomes evident that there are polarization components linked to resistive processes at high frequency, as well as charge transference and diffusional at mid and low frequency, respectively. (author)

  19. Reference Gene Selection in the Desert Plant <em>Eremosparton songoricuem>m>

    Directory of Open Access Journals (Sweden)

    Dao-Yuan Zhang

    2012-06-01

    Full Text Available <em>Eremosparton songoricum em>(Litv. Vass. (<em>E. songoricumem> is a rare and extremely drought-tolerant desert plant that holds promise as a model organism for the identification of genes associated with water deficit stress. Here, we cloned and evaluated the expression of eight candidate reference genes using quantitative real-time reverse transcriptase polymerase chain reactions. The expression of these candidate reference genes was analyzed in a diverse set of 20 samples including various <em>E. songoricumem> plant tissues exposed to multiple environmental stresses. GeNorm analysis indicated that expression stability varied between the reference genes in the different experimental conditions, but the two most stable reference genes were sufficient for normalization in most conditions.<em> EsEFem> and <em>Esα-TUB> were sufficient for various stress conditions, <em>EsEF> and <em>EsACT> were suitable for samples of differing germination stages, and <em>EsGAPDH>and <em>Es>UBQ em>were most stable across multiple adult tissue samples. The <em>Es18Sem> gene was unsuitable as a reference gene in our analysis. In addition, the expression level of the drought-stress related transcription factor <em>EsDREB2em>> em>verified the utility of<em> E. songoricumem> reference genes and indicated that no single gene was adequate for normalization on its own. This is the first systematic report on the selection of reference genes in <em>E. songoricumem>, and these data will facilitate future work on gene expression in this species.

  20. Synthesis, Crystal Structure and Luminescent Property of Cd (II Complex with <em>N-Benzenesulphonyl-L>-leucine

    Directory of Open Access Journals (Sweden)

    Xishi Tai

    2012-09-01

    Full Text Available A new trinuclear Cd (II complex [Cd3(L6(2,2-bipyridine3] [L =<em> Nem>-phenylsulfonyl-L>-leucinato] has been synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction analysis. The results show that the complex belongs to the orthorhombic, space group<em> Pem>212121 with<em> aem> = 16.877(3 Å, <em>b> em>= 22.875(5 Å, <em>c em>= 29.495(6 Å, <em>α> em>= <emem>= <emem>= 90°, <em>V> em>= 11387(4 Å3, <em>Z> em>= 4, <em>Dc>= 1.416 μg·m−3, <emem>= 0.737 mm−1, <em>F> em>(000 = 4992, and final <em>R>1 = 0.0390, <em>ωR>2 = 0.0989. The complex comprises two seven-coordinated Cd (II atoms, with a N2O5 distorted pengonal bipyramidal coordination environment and a six-coordinated Cd (II atom, with a N2O4 distorted octahedral coordination environment. The molecules form one dimensional chain structure by the interaction of bridged carboxylato groups, hydrogen bonds and p-p interaction of 2,2-bipyridine. The luminescent properties of the Cd (II complex and <em>N-Benzenesulphonyl-L>-leucine in solid and in CH3OH solution also have been investigated.

  1. Molecular Cloning and Functional Analysis of Three <em>FLOWERING LOCUS T (FTem> Homologous Genes from Chinese <em>Cymbidium>

    Directory of Open Access Journals (Sweden)

    Jaime A. Teixeira da Silva

    2012-09-01

    Full Text Available The <em>FLOWERING LOCUS Tem> (<em>FT> gene plays crucial roles in regulating the transition from the vegetative to reproductive phase. To understand the molecular mechanism of reproduction, three homologous <em>FT> genes were isolated and characterized from <em>Cymbidium sinenseem> “Qi Jian Bai Mo”, <em>Cymbidium goeringiiem> and <em>Cymbidium ensifoliumem> “Jin Si Ma Wei”. The three genes<em> em>contained 618-bp nucleotides with a 531-bp open reading frame (ORF of encoding 176 amino acids (AAs. Alignment of the AA sequences revealed that CsFT, CgFT and CeFT contain a conserved domain, which is characteristic of the<em> em>PEBP-RKIP superfamily, and which share high identity with FT of other plants in GenBank: 94% with OnFT<em> em>from <em>Oncidium em>Gower Ramsey, 79% with Hd3a from <em>Oryza sativaem>, and 74% with FT from <em>Arabidopsis thalianaem>. qRT-PCR analysis showed a diurnal expression pattern of <em>CsFT>, <em>CgFT> and <em>CeFT> following both long day (LD, 16-h light/8-h dark and short day (SD, 8-h light/16-h dark treatment. While the transcripts of both <em>CsFT em>and <em>CeFT em>under LD were significantly higher than under SD, those of <em>CgFT em>were> em>higher under SD. Ectopic expression of <em>CgFT> in transgenic <em>Arabidopsis> plants resulted in early flowering compared to wild-type plants and significant up-regulation of <em>APETALA1em> (<em>AP1em> expression. Our data indicates that CgFT is a putative phosphatidylethanolamine-binding protein gene in <em>Cymbidium> that may regulate the vegetative to reproductive transition in flowers, similar to its <em>Arabidopsis> ortholog.

  2. <em>α>-Glucosidase Inhibitory Constituents from <em>Acanthopanax senticosusem> Harm Leaves

    Directory of Open Access Journals (Sweden)

    Hai-Xue Kuang

    2012-05-01

    Full Text Available A new triterpene glycoside, 3-<em>O-[(α>-L-rhamnopyranosyl(1→2]-[<em>β>-D-glucuronopyranosyl-6-<em>O>-methyl ester]-olean-12-ene-28-olic acid (1 and a new indole alkaloid, 5-methoxy-2-oxoindolin-3-acetic acid methyl ester (5 were isolated from the leaves of <em>Acanthopanax senticosusem> Harms along with six known compounds. The structures of the new compounds were determined by means of 2D-NMR experiments and chemical methods. All the isolated compounds were evaluated for their glycosidase inhibition activities and compound 6 showed significant <em>α>-glucosidase inhibition activity.

  3. Application of geophysical methods to gold prospecting in Minas de Corrales, Uruguay; Aplicacao de metodos geofisicos a prospeccao de ouro. Teste nas minas de Corrales, Uruguai

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Antonio Flavio U. [Companhia de Pesquisas de Recursos Minerais (CPRM), Rio de Janeiro, RJ (Brazil); Dias, Rogerio Aguirre; Barcelos, Andre B.B. de [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil)

    1993-07-01

    Geophysical methods were tested in San Gregorio gold mine, Minas de Corrales, north region of Uruguay. The ores are mainly stockworks, sheeted veinlet zones, ore shoot and disseminated sulfides types, situated in a silicated and carbonated shear zone structure, over granitic mylonites, quartz diorites, quartz-feldspathic breccia, basic rocks and quartz veins. Magnetic and radiometric methods were applied . VLF and EM34-3 detected the high resistivity silicated and carbonated zone and IP detected a weak PFE anomaly associated with pyrite/gold zone. (author)

  4. Neonatal Phosphate Nutrition Alters <em>in em>Vivo> and <em>in em>Vitro> Satellite Cell Activity in Pigs

    Directory of Open Access Journals (Sweden)

    Chad H. Stahl

    2012-05-01

    Full Text Available Satellite cell activity is necessary for postnatal skeletal muscle growth. Severe phosphate (PO4 deficiency can alter satellite cell activity, however the role of neonatal PO4 nutrition on satellite cell biology remains obscure. Twenty-one piglets (1 day of age, 1.8 ± 0.2 kg BW were pair-fed liquid diets that were either PO4 adequate (0.9% total P, supra-adequate (1.2% total P in PO4 requirement or deficient (0.7% total P in PO4 content for 12 days. Body weight was recorded daily and blood samples collected every 6 days. At day 12, pigs were orally dosed with BrdU and 12 h later, satellite cells were isolated. Satellite cells were also cultured <em>in vitroem> for 7 days to determine if PO4 nutrition alters their ability to proceed through their myogenic lineage. Dietary PO4 deficiency resulted in reduced (<em>P> < 0.05 sera PO4 and parathyroid hormone (PTH concentrations, while supra-adequate dietary PO4 improved (<em>P> < 0.05 feed conversion efficiency as compared to the PO4 adequate group. <em>In vivoem> satellite cell proliferation was reduced (<em>P> < 0.05 among the PO4 deficient pigs, and these cells had altered <em>in vitroem> expression of markers of myogenic progression. Further work to better understand early nutritional programming of satellite cells and the potential benefits of emphasizing early PO4 nutrition for future lean growth potential is warranted.

  5. Fabrication and electrical characterization of polyaniline-silicon heterojunction for gamma radiation dosimetry application; Fabricacao e caracterizacao eletrica de heterojuncoes de polianilina - silicio para aplicacao em dosimetria de radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Laranjeira, Jane Maria Goncalves

    2004-08-15

    In this work a technique has been developed to fabricate high quality polyaniline-silicon heterojunction diodes for use as gas and/or ionizing radiation sensors. Polyaniline thin films (40 nm thick) produced by spin-coating on silicon substrates, were the active part of the junction structure. The devices presented excellent reproducibility of their electrical characteristics with high rectification ratio, 60,000 at {+-}1.0 V, and typical reverse current at - 1.0 V of 3 nA at 295 K. A G/I x G plot has been used to analyze the current-voltage characteristics, yielding typical series resistance of 4 k{omega} {+-} 5% and ideality factor in a range of 1,9 {+-} 0.5%. The heterojunction diode presents high sensitivity to gamma radiation in the dose range of 3 x 10{sup -2} to 7 kGy with a linear response in the forward and reverse bias. The excellent electrical characteristics together with the linear response with the dose, strongly suggest the application of this device for spectrometry or dosimetry of high doses of gamma radiation. These devices presented high sensitivity to gas moistures such as ammonia, nitric acid and trichloroethylene. In both cases the sensitivity was observed through shifts of the current-voltage curves, which can be easily monitored to provide a calibration curve of the sensor either as a radiation dosimeter or as a gas sensor for use in applications for gas monitoring or radiation dosimetry. Several aspects of the reliability physics of silicon-polyaniline heterojunction, such as degradation effects induced by local heating, charge trapping and temperature changes, have been discussed. These results further confirm the quality of the devices electrical characteristics and their suitability for radiation and gas sensors applications. Another interesting results presented in this work was the use of polyemeraldine nanofilms (thickness in the range 30-50 nm) deposited by 'spin coating' on glass substrates as an optical dosimeter for gamma radiation based on the color change of the polymer. The nanofilms devices were characterized by UV visible absorption spectroscopy. The deep blue color, characteristic of undoped polyaniline films before irradiation, becomes subsequently green as the film is being irradiated, and the film absorption coefficient exhibits a linear dependence with the logarithm of the irradiation dose from I to 10 kGy. (author)

  6. Application of the Hierarchy Analysis Process close to Complete Cost Analysis methodology for the Energy Resource Integrated Planning (RIP); Aplicacao do Processo de Analise Hierarquica em conjunto da Analise de Custos Completos

    Energy Technology Data Exchange (ETDEWEB)

    Reinig, Alexandre Orrico; Cicone Junior, Decio; Galvao, Luiz Claudio Ribeiro [Universidade de Sao Paulo (EPUSP), SP (Brazil). Escola Politecnica. Dept. de Engenharia e Automacao Eletricas; Udaeta, Miguel Edgar Morales [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia

    2008-07-01

    The objective of this work is to demonstrate the application of the Analytic Hierarchy Process (PAH) with the support of computational tools in the Complete Costs Evaluation (Acc) to classify energy resources, emphasizing as this important method of decision making can be used with the ACC inside of the integrated resources planning for energy resources (PIR). The use of the methodology in question inside of the PUR has a permanent goal to interrelate the complete technical valuation o f the resources and its qualitative valuation carried through by he involved and interest (En-Ir) of the PIR, as well as the evaluation of the resources inside of multidimensional criteria of the ACC. For this, the way is presented as thee valuation of the social dimension of the ACC in the PIR in the Aracatuba's Administrative Region (RAA) was made and ranking generated with the application of the PAH inside of the ACC. The main result is the validation of the AHP with the use of the Decision Lens for the ACC in the PIR, and from that conclude that the ranking of many energy resources using Decision Lens facilitates the process of PIR in the posterior Wallet of Resources and preferential plan determination. (author)

  7. Neutron cross section measurements of water, heavy water, urine and blood for nutrition application; Medidas de secoes de choque para neutrons da agua leve, da agua pesada, urina e sangue para aplicacao em nutricao

    Energy Technology Data Exchange (ETDEWEB)

    Voi, Dante Luiz; Oliveira Ferreira, Francisco J. de [Instituto de Engenharia Nuclear (IEN), Rio de Janeiro, RJ (Brazil); Rocha, Helio F. da [Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Pediatria e Puericultura Marzagao Gesteira

    1997-12-01

    The present work describes the application of a method developed at the reactor physics laboratory of IEN-CNEN-RJ for the determination of body water in subjects. The method is based on neutron cross section determinations of molecular compounds. It was used the crystal neutron spectrometer installed in J-9 channel irradiation of the Argonauta reactor. Hydrogenous and deuterated samples were measured to demonstrate the viability of the method. (author). 3 refs., 1 tab.

  8. Study of the stability of sugar Ester and its application potential with additives in the drilling fluids; Estudo da estabilidade do ester de acucar e sua potencial aplicacao como aditivo em fluido de perfuracao

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, Suzan I.G.; Costa, Marta; Macedo, Sinara P.N. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    This work describe the enzymatic synthesis of the glucose ester starting from fatty acid, using protease Bacillus subtilis as biologic catalyst. The efficiency of ester has determined through the surface tension analyses in different pH (2-12), temperature (25-100 deg C) and salinity (50-115 g/L of NaCl). For a better understanding as for the applicability of the ester of sugar in drilling fluids, it was done necessary to know the values of interfacial tension of the oil/water; in that analysis, the mineral oil was investigated as oily phase and, as aqueous phase, biosurfactant solution. The results of interfacial tension of the water/oil and biosurfactant /oil they allowed to quantify us the influence of the benefactor's front to an organic phase, because the same made a significant reduction the interfacial tension of 26,0725 mN/m (water/oil) or 1,7527 mN/m (biosurfactant aqueous solution/oil). D-glucose ester was shown stable in different concentrations of NaCl, pH and temperature, and efficient in the reduction of the superficial tension of the water (of 72 mN/m for 28 mN/m). Preliminary test reveal that the ricinoleoil of D-glucose presents functionality as lubricant for drilling fluids to the base water. In the studied formulations, the obtained composition reduces the coefficient of lubricity of 0,20 for 0,04 and it stabilizes the fluid, reducing the volume of the filtrate of 5,0 mL for 3,4 mL. (author)

  9. Study of parametric methods for identification of mathematical models and Sundaresam method application in a steam boiler; Estudo dos metodos parametricos de identificacao de modelos matematicos e aplicacao do metodo de Sundaresam em uma caldeira a vapor

    Energy Technology Data Exchange (ETDEWEB)

    Schuttenberg, Rose Mary Cosso [Pontificia Univ. Catolica de Minas Gerais, Belo Horizonte, MG (Brazil). Nucleo de Controle de Processos

    1999-12-01

    Some identification techniques are discussed and the required data for application to the Sundaresam's identification method are obtained by connecting a microcomputer to the Spiraflo, an instrument available at the CEFET/MG - Federal Center for Technological Education of Minas Gerais, Brazil - steam boiler. All the graphical output, by an specified test, for the temperature, steam's flow and pressure are shown and analyzed. Through picked up data and Sundaresan's method, the transfer function between the pressure of the CEFET-MG's steam boiler and the flow is identified. (author)

  10. The application of scenarios techniques for evaluation of portfolio investments in E and P projects; A aplicacao das tecnicas de cenarios na avaliacao de carteira de investimentos em projetos de E e P

    Energy Technology Data Exchange (ETDEWEB)

    Torres, Arnaldo L.M.; Rocha, Fabio M.; Rodrigues, Joao R.L.; Farias Filho, Jose Rodrigues de; Campagnac, Luiz A.P. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Nucleo de Competitividade, Estrategia e Organizacoes (LABCEO)

    2008-07-01

    Managements in the organizations deal daily with decision making, today the market competitiveness requires rationality and efficiency. In the project portfolio management a lot of questions emerge to the management, such as: The projects chosen are really the best projects? They are suitable for the reality of the company? The evaluation criteria are appropriate? The methodology employed is adequate? The application of resources is optimized? There is a real commitment from all levels of the organizational structure? In this context, the objective of this work is to describe a model that try to be more applied to the reality, taking into consideration conceptual and motivational aspects related to the implementation of project management involving high investment with restrictions on resources, and still provide a tool to support decision . (author)

  11. Synthesis and characterization of hydroxyapatite porous matrixes for application as radiation sources in brachytherapy; Sintese e caracterizacao de matrizes porosas de hidroxiapatita para aplicacao como fontes radioativas em braquiterapia

    Energy Technology Data Exchange (ETDEWEB)

    Lacerda, Kassio Andre; Lameiras, Fernando Soares; Silva, Viviane Viana [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)]. E-mail: kassiolacerda@yahoo.com.br

    2006-04-15

    Porous ceramic materials based on calcium phosphate compounds (CPC) have been studied aiming at different biomedical applications such as implants, drug delivery systems and radioactive sources for brachytherapy. Two kinds of hydroxyapatite (HAp) powders and their ceramic bodies were characterized by a combination of different techniques (X-rays diffraction and fluorescence, infrared spectrophotometry, BET method, thermal analysis, and scanning electron microscopy) to evaluate their physico-chemical and microstructural characteristics in terms of chemical composition, segregated phases, microstructure, porosity, and chemical and thermal stability. The results revealed that these systems presented potential for use as porous biodegradable radioactive sources able to be loaded with a wide range of radionuclides for cancer treatment by the brachytherapy technique. (author)

  12. Boundary integral method application in the transportation modeling of radioactive tracers in porous ways; Aplicacao do metodo da integral de contorno na modelagem do transporte de tracadores radioativos em meios porosos

    Energy Technology Data Exchange (ETDEWEB)

    Ferroni, Jose Geraldo

    1996-03-01

    This work describes a method for estimating the effluent concentrations of radioactive tracers in production wells, considering well to well injection tests and piston-like displacements of fluids in the reservoir. The model for tracer transportation takes into account effects of convection and hydrodynamic dispersion. (author)

  13. Evaluation of mechanical and electrical properties for an aluminium alloy thermo resistant for application in electrical cables and wires; Avaliacao das propriedades mecanicas e eletricas para uma liga de aluminio termorresistente para aplicacao em fios e cabos eletricos

    Energy Technology Data Exchange (ETDEWEB)

    Amaral, M.A.; Reis, W.L.S.; Souza, A.T.M.D.; Quaresma, J.M.V. [Universidade Federal do Para, Belem, PA (Brazil)

    2010-07-01

    With the constant growth of brazilian industry and, consequently, the demand for electric power, realized the need to develop new metal alloys for use in wire and cable transmission and distribution of electricity to support the high temperatures which will be submitted. this study is based on the modification of aluminum by contents of Zr. the alloys were cast into ingot shaped {sup u,} after machined to a diameter of 18 mm, were homogenized and cold-worked (rolled). subsequently underwent a series of heat treatments at temperatures (230 degree c, 310 degree c and 390 degree c) for one hour in order to obtain the recrystallization temperature of alloys and demonstrate its potential for thermo resistant. With the inclusion of increasing contents of Zr, the alloy showed a higher recrystallization temperature and an increase in their limit of tensile strength. (author)

  14. Mechanical and electrical evaluation of a dilute aluminium alloy heat treated for application in electrical cables and wires; Avaliacao mecanica e eletrica de uma liga diluida de aluminio tratada termicamente para aplicacao em fios e cabos eletricos

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, E.S. [Faculdade de Engenharia Mecanica - Unicamp - Campinas, SP (Brazil)], e-mail: manu@fem.unicamp.br; Kamizono, K.A.; Nogueira, P.; Nogueira, A.T.; Quaresma, Jose Maria do Vale [Universidade Federal do Para - UFPA, PA (Brazil)

    2010-07-01

    With the need to investigate new materials developed and presented to the market of non-ferrous materials and in particular those developed for the transmission and distribution of electricity, we conducted a study on a dilute alloy Al-EC-0, 7% Si, where from his previous characterization and thus knowing their good mechanical and electrical properties, we developed a new aluminum alloy in an attempt to know the properties of the alloy Al-EC-0, 7% Si in the presence of alloying elements, titanium. Being the new alloy under different thermal treatment temperature in order to observe their behavior under such mechanical and electrical conditions. (author)

  15. Application of neutron activation analysis for the determination of essential elements in egg samples; Aplicacao da analise por ativacao com neutrons para a determinacao de elementos essenciais em amostras de ovos

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Bruna G.; Maihara, Vera A.; Avegliano, Roseane P., E-mail: brunagabrielegomes@gmail.com, E-mail: vmaihara@ipen.br, E-mail: pagliaro@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2013-07-01

    The eggs are among the twenty foods consumed by the population of the five major regions of Brazil. Among the types of eggs, there are differences in nutritional value, which can vary according to the food of the bird. This study evaluating the elements Cl, K, Mg, Mn and Na considered essential micronutrients in food, because they are fundamental in several metabolic processes necessary for the maintenance and training of the human body. We analyzed three types of eggs: egg whites, of the quail, and the colonial in cooked and raw form, using the Instrumental Neutron Activation Analysis method (INAA). The egg samples were lyophilized and pulverized before analysis. To validate the methodology, reference materials NIST RM 8415 Whole Egg Powder and NIST SRM 1567 Wheat Flour were analyzed. The samples, reference materials and standards of the elements were irradiated for 20 seconds under a thermal neutron flux of 6,6x10{sup 12} cm -2 s -1 in the nuclear research reactor IEA-R1 of IPEN-CNEN / SP. The results were consistent with the values of the Brazilian Table of Food Composition (TACO)

  16. Assessment of recycled PET properties for application on oil wells as sand control agents; Avaliacao de propriedades de PET reciclado para aplicacao em pocos de petroleo como agente de contencao de areia

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Alexandre Zacarias Ignacio [PETROBRAS, Rio de Janeiro, RJ (Brazil); Delpech, Marcia Cerqueira [Universidade do Estado do Rio de Janeiro (IQ/UERJ), RJ (Brazil). Inst. de Quimica], e-mail: mcd@uerj.br

    2008-07-01

    The Sand Control is fundamental for oil production in unconsolidated sandstone formations. It consists of the installation of a filter made of stainless steel screens and grained materials (sand control agents) which are, normally, high density inorganic substances (sand, ceramic, bauxite). Shallow formations, near to the sea bed, are more sensitive and need different kinds of sand control agents with low density. The objective of this work was the evaluation of recycled poly(ethylene terephthalate), PET, as sand control agent for oil wells. Pack permeability and thermal stability tests results, after up to six months of exposure to sea water and crude oil, have indicated that the recycled PET kept the necessary characteristics for the proposed application. Also, it was observed that the PET grain pack did not presented significant property modifications in the exposure conditions, when compared to the non-exposed samples. (author)

  17. An artificial neural network strategy for monitoring of gas/oil systems in slug flow pattern; Aplicacao de redes neurais artificiais no monitoramento do escoamento de sistemas gas/oleo em regime de golfadas

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Fernando H.B. [Universidade Tiradentes (UNIT), Aracaju, SE (Brazil). Instituto de Tecnologia e Pesquisa; Universidade Federal de Campina Grande (UFCG), PB (Brazil); Silva, Rosivania P.; Fortuny, Montserrat; Santos, Alexandre F. [Universidade Tiradentes (UNIT), Aracaju, (Brazil). Instituto de Tecnologia e Pesquisa; Nunes, Giovani C. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    In the petroleum industry, the design of multiphase production systems requires an accurate estimation of the gas-oil ratio (GOR) in the transporting pipelines. However, existing GOR estimation methods are often inadequate in terms of desired accuracy and application range, due to the complex phase distributions and the wide range of fluid properties encountered in production operations. In this paper, the effectiveness of using artificial neural networks in determining GOR values is evaluated, proving to be a reasonable way to monitor this property during oil transportation. (author)

  18. Application of perturbation methods for sensitivity analysis for nuclear power plant steam generators; Aplicacao da teoria de perturbacao a analise de sensibilidade em geradores de vapor de usinas nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Gurjao, Emir Candeia

    1996-02-01

    The differential and GPT (Generalized Perturbation Theory) formalisms of the Perturbation Theory were applied in this work to a simplified U-tubes steam generator model to perform sensitivity analysis. The adjoint and importance equations, with the corresponding expressions for the sensitivity coefficients, were derived for this steam generator model. The system was numerically was numerically solved in a Fortran program, called GEVADJ, in order to calculate the sensitivity coefficients. A transient loss of forced primary coolant in the nuclear power plant Angra-1 was used as example case. The average and final values of functionals: secondary pressure and enthalpy were studied in relation to changes in the secondary feedwater flow, enthalpy and total volume in secondary circuit. Absolute variations in the above functionals were calculated using the perturbative methods, considering the variations in the feedwater flow and total secondary volume. Comparison with the same variations obtained via direct model showed in general good agreement, demonstrating the potentiality of perturbative methods for sensitivity analysis of nuclear systems. (author) 22 refs., 7 figs., 8 tabs.

  19. Evaluation of the potential application of 2-acetylpyridine N4- phenyl thiosemicarbazones derivatives for cancer therapy and diagnosis; Avaliacao da potencial aplicacao de derivados de 2-acetilpiridina N-4 fenil tiossemicarbazonas em terapia e diagnostico oncologico

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Marcella Araugio

    2013-08-01

    Despite the wide range of antineoplastic agents available, resistance of some types of cancer and toxicity to normal cells have been identified as the main causes of treatment failure and death. The lack of early and precise diagnosis is also responsible for reducing survival of cancer patients. In this context, the development of substances with low toxicity and therapeutic potential and/or diagnosis purpose, is the major tool in an attempt to increase the survival of patients and assure the safety and efficacy of treatment. Thiosemicarbazones (TSC) are a class of synthetic compounds that have several biological activities, including antitumor. Although several studies have shown the great potential of TSC as therapeutic and / or diagnostic agents, different chemical modifications performed on this class of molecules indicate new possibilities for applications and still require further studies. The objective of this study was to evaluate the potential applicability of 2-acetylpyridine N-4-phenyl thiosemicarbazones derivatives for cancer therapy and diagnosis. The results showed that all 13 TSC tested were cytotoxic to breast and glioblastoma tumor cell lines, presenting higher in vitro antitumor activity than etoposide, an antineoplastic and inhibitor of topoisomerase II frequently used for cancer therapy. The TSC that have halogen or nitro on ortho position showed higher antitumor activity in vitro than their isomers with halogen or nitro on meta or para position of the phenyl group. H2Ac4oFPh and H2Ac4oClPh compounds showed the highest antitumor activity among all tested compounds, with IC{sub 50} in nanomolar order. These TSC induced cell death by apoptosis and oxidative stress was responsible, at least in part, for this type of cell death. The 5 mg.kg{sup -1} H2Ac4oFPh dose, administered s.c., for 4 consecutive days, did not induce important toxicity; however, the same treatment protocol was not effective for tumor growth reduction in an animal model of brain tumor. Radioactive probes of H2Ac4oFPh were synthesized using {sup 111}In or {sup 67}Ga as radiotracers, with satisfactory specific activity and radiochemical purity. H2Ac4oFPh-{sup 111}In was more useful than H2Ac4oFPh-{sup 67}Ga, with higher specific activity, better chemical purity, better in vitro stability, higher distribution volume, faster blood clearance and, therefore, was considered the most promising for application in molecular imaging studies. H2Ac4oFPh-{sup 111}In also showed high lipophilicity and was internalized by glioblastoma cells in vitro. H2Ac4oFPh-{sup 111}In showed significative tumor uptake in vivo, however, the high abdominal uptake and high background did not allow a good visualization of tumor in imaging studies. Unlike intravenous administration, intratumoral administration allowed greater diffusion and retention of H2Ac4oFPh-{sup 111}In in the tumor site and significantly reduced the activity accumulated in the organs. These results encourage new experiments to be performed in order to promote the complexation of H2Ac4oFPh with particle emitters, such as yttrium-90, to evaluate its application in local radioisotopic therapy for glioblastoma multiforme. (author)

  20. Application of a molecular sieve in the drying of solid insulation in energized power transformers; Aplicacao de peneira molecular na secagem da isolacao solida em transformadores de potencia energizados

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Julio C.P.; Silva, Carlos A. [Eletropaulo Metropolitana e Eletricidade de Sao Paulo S.A. (AES ELETROPAULO), SP (Brazil)], E-mails: julio.pereira@aes.com, carlos.alves@aes.com; Wilhelm, Helena M.; Mattoso, Mauricio; Piovezan, Natalia; Fernandes, Paulo O. [DIAGNO - Materiais e Meio Ambiente Ltda (Brazil)], E-mails: mattoso@diagno.srv.br, natalia@diagno.srv.br, fernandes@diagno.srv.br; Hossri, Jose Henrique C. [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Instituto de Eletrotecnica e Energia], E-mail: henrique.hossri@iee.usp.br; Galdeano, Claudio A.; Silva Junior, Milton M. [MGM - Consultoria e Diagnosticos em Equipamentos Eletricos Ltda, Campinas, SP (Brazil)], E-mails: laudio@mgmdiag.com.br, junior@mgmdiag.com.br

    2011-10-15

    The main objective of this study was to assess a new adsorbent material to remove water from insulating mineral oil (IMO) in transformers during operation (while energized). A process for recovery of the adsorbent material, aiming at its reuse was also tested. The results indicated that it is possible to remove water from IMO in energized transformers safely and with remote online monitoring, using a molecular sieve, recyclable by steam washing. (author)

  1. Evaluation of performance of AISI 444 steel for application in distillation towers; Avaliacao do desempenho do aco AISI 444 para aplicacao como 'lining' em torres de destilacao

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, R.F.; Miranda, H.C. de; Farias, J.P. [Universidade Federal do Ceara (DEMM/UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Metalurgica e de Materiais. Lab. de Caracterizacao de Materiais], e-mail: rf.guimaraes@yahoo.com.br

    2008-07-01

    In this work, the behavior of the AISI 444 ferritic stainless steel submitted to thermal fatigue test and their corrosion resistance in heavy crude oil was evaluated. The AWS E309MoL-16 and E316L-17 weld metal was employed as filler metal. Plates of the AISI 444 were welded on ASTM A-516 Gr. 60 plates and submitted to fatigue thermal cycle. Samples were extracted from plates welded and heat treated immersed in heavy crude oil at 300 deg C. Optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive of X-ray analysis (EDX) were used to characterize the microstructure and the corroded surface. The results show that the AISI 444 stainless steels did not present cracks after the thermal fatigue cycle and the heat treated immerse in heavy crude oil. The electrode AWS E309MoL-16 show better corrosion resistance than the AWS E316L-17. (author)

  2. Application of heterogeneous photocatalysis solar and artificial for removal of ammonia nitrogen and total phosphorus in sanitary waste water; Aplicacao da fotocatalise heterogenea solar na remocao de nitrogenio amoniacal e fosforo total em esgoto sanitario

    Energy Technology Data Exchange (ETDEWEB)

    Francisco, Adriana Ribeiro; Paterniani, Jose Euclides Stipp [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Agricola], E-mail: z_drica@yahoo.com.br; Kuwakino, Adriana Yuri [Universidade Estadual de Campinas (UNICAMP), Limeira, SP (Brazil). Fac. de Tecnologia

    2010-07-01

    The advanced oxidative processes (AOP) contribute or to polishing a plenty of effluent treatment, or improvement at any stage of treatment, being heterogeneous photocatalysis the most used among AOP. This study aimed to compare the heterogeneous photocatalysis in solar and artificial wastewater treatment according to the removal of ammonia nitrogen and phosphorus. The photocatalytic reactor using titanium dioxide (TiO{sub 2}) as semiconductor photocatalytic process. The heterogeneous photocatalysis using solar UV consisted material of PET bottles and the sample was added TiO{sub 2} in constant aeration for a period of 360 minutes. In the case of reactor artificial UV light protected by a quartz tube, the process was made in a Pyrex glass reactor, where the sample was undergoing 180 minutes of aeration. The photocatalytic tests for removal of ammonia nitrogen showed more favorable in the photocatalysis of artificial UV than the solar, coming achieve average efficiency of 51% and 32%, respectively. In the case of phosphorus, the situation was reversed, the solar UV photocatalytic average efficiency reached 51% and artificial UV 32 %. (author)

  3. Determining internal movement costs at a warehouse using activity-based costing: offshore petroleum production application; Determinacao dos custos de movimentacao interna de um deposito utilizando a metodologia de custeio baseado em atividades: aplicacao a producao de petroleo offshore

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Italo Ricardo Moreira de [Brasil Supply S.A., Vitoria, ES (Brazil); Leal, Jose Eugenio [Pontificia Univ. Catolica do Rio de Janeiro (PUC-Rio), RJ (Brazil)

    2004-07-01

    As from the flexibilization of the petroleum monopoly, which took place in the second half of the 1990's, the petroleum and gas sector in Brazil has undergone a series of changes that have directly impacted the commercial relations among the companies in the sector. The increases in operational efficiency and reduction of costs have become basic factors for the companies wishing to compete in this market. This paper presents a study whose objective is to map, model, and determine the costs involved in the process for internal movement in a warehouse used as logistics support to offshore petroleum production. Based on the description of the internal movement process for product storage, the main resources are identified. Then, a mathematical model based on Activity-Based Costing is draw up, in which the results generated comprise the values for internal movement costs for each type of product moved in the warehouse. (author)

  4. Optical fibre-lightning arrester cable appliances. Its repercussion in concrete unconventional power transmission lines projects; Aplicacao de cabo para-raios composto com fibra optica. Sua repercursao em projetos de LT`s concreto nao convencionais

    Energy Technology Data Exchange (ETDEWEB)

    Haddad, Ramon Sade [Companhia Energetica de Minas Gerais (CEMIG), Belo Horizonte, MG (Brazil)

    1993-12-31

    With the adoption of lightning rod cables made of Optical Fibre, (in systems over Europe, Japan and North America), these became very popular in Countries capable of installing the system. The Brazilian electrical party was then challenged by a new technological experience: the lightning rod cable for lines of transmission has specific characteristics. The particularity of the electrical system in Brazil in relation to the diversity of the parameters involved, and the necessity to clarifying the concepts, take us to new strategies in planning and measuring our Power Transmission Lines 4 refs., 1 tab.

  5. Biosurfactant production for application in soil remediation contaminated by oil: study of the virulence factors; Producao de biosurfactantes para aplicacao em remediacao de solos contaminados por petroleo: estudo dos fatores de virulencia

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Ana Carolina Loureiro Brito; Pereira, Marcos Dias; Freire, Denise Maria Guimaraes [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Quimica; Kronemberger, Frederico de Araujo [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE)

    2008-07-01

    Biosurfactants are amphipatic molecules produced by microorganisms. The rhamnolipid (RML) is a group of those molecules, most produced by strains of Pseudomonas. In this present work, the effect of superficial aeration on the production of rhamnolipids and virulence factors, from proteins produced by Pseudomonas aeruginosa PA1, isolated from oil extraction wells, was evaluated. Cell growth, glycerol and nitrate consumption, rhamnolipid production, nonspecific proteases, total proteins and elastases where investigated on different flask volume/medium volume relations (Vf/Vm): 1:0,15, 1:0,30, 1:0,50 and 1:0,70. It was observed that better oxygenation leaded to better results on the rhamnolipid production. Two peaks of elastase activity were noted, showing possible presence of two types of elastases that could be dislocated on fermentation time, due to the oxygenation degree. The major production of rhamnolipid was found on the 1:0,50 condition and different non-specific proteases standards were found due to the oxygenation degrees. (author)

  6. Chemical modification of high molecular weight polyethylene through gamma radiation for biomaterials applications; Modificacao quimica de polietileno de alto peso molecular atraves de radiacao gama para aplicacao em biomateriais

    Energy Technology Data Exchange (ETDEWEB)

    Raposo, Matheus P.; Rocha, Marisa C.G., E-mail: matheusmerlim@hotmail.com [Universidade Estado do Rio de Janeiro (UERJ), Nova Friburgo, RJ (Brazil). Instituto Politecnico

    2015-07-01

    Ultra high molecular weight polyethylene has been used in the medical field due to its high mechanical properties compared to the other polymers. Its main application is in the development of orthopedic implants, which requires high resistance to abrasion. One of the most used methods is the introduction of crosslinks in the polymer through gamma irradiation. In order to prevent oxidation reactions, studies have been developed using tacoferol (vitamin E) as an antioxidant for the material. The ascorbic acid (vitamin C), however, has been appointed as a viable alternative for vitamin E. In this work, a high molecular weight polyethylene grade (HMWPE) and polyethylene samples formulated with vitamin C were submitted to gamma radiation. Thermodynamic-mechanical methods and gel content determinations were used to characterize the samples obtained. The sample containing 1% of vitamin C and irradiated with 50 KGy of gamma radiation presented the highest content of crosslinks. (author)

  7. Use of activation analysis method for determining trace elements in human nail clippings; Aplicacao do metodo de analise por ativacao a determinacao de elementos tracos em aparas de unhas humanas

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, Amilton Reinaldo; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    1999-11-01

    This work presents results obtained in nail clipping samples analyses. These nail samples were collected from healthy group of individuals and from patients with cystic fibrosis disease. Irradiation of nail clippings was carried out with a thermal neutron flux from 10{sup 11} to 10{sup 13} n.cm{sup -2}.s{sup -1} at the IEA-R1m nuclear research reactor and the elements Al, As, Br, Ca, cd, Cl, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Se and Zn were determined. The results obtained for healthy group were within the range of concentrations published, for normal population. However for several elements, the group of patients presented higher concentrations than those presented for healthy individuals. The precision and the accuracy of the results were evaluated by analyzing reference materials NIST 1577b Bovine Liver and 1566a Oyster Tissue. (author) 6 refs., 4 tabs.

  8. Neutron activation analysis applied to the determination of trace elements in human nails; Aplicacao do metodo de analise por ativacao com neutrons a determinacao de elementos traco em unhas humanas

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, Amilton Reinaldo

    2001-07-01

    There is a considerable interest in the determination of trace elements in human nails in order to use this tissue as a monitor of nutritional and healthy status of individuals, of occupational exposure diseases and of the environmental contamination. In this work, instrumental neutron activation analysis was applied to determine trace elements in finger nail clippings to make comparisons between the elemental concentrations obtained in nails from healthy individuals of a control group and those from cystic fibrosis (CF) patients. Firstly, a protocol for sample collection and preparation for analysis was established. Finger and toe nail samples from CF patients were collected at the Instituto da Crianca of Medicine School, University of Sao Paulo, SP. The nail samples from control group were collected from healthy adults and from children living in Sao Paulo city, SP. These samples were cleaned by stirring them witha a diluted Triton X100 solution and then by washing with distilled water and acetone. The analytical procedure consisted of irradiation nail samples and elemental standards in the IEA-R1m nuclear reactor under thermal neutro flux of about 10{sup 12} n cm{sup -2} s{sup -1}, for short and long period irradiations. The activities of the radionuclides were measured using a gamma-ray spectrometer comprising an hyperpure Ge detector and associated electronic system. The biological reference materials Bovine Liver 1577b and Oyster Tissue 1566a, both from National Institute of Standards and Technology, USA were analysed in order to evaluate the accuracy and precision of the results. The analysis of variance (ANOVA) and F-test at the significance level of 5% were used to make a comparison between the sets of results obtained in this work. In the comparison of the results obtained for finger and toe nails from CF patients, the Br concentrations were higher in finger nails that those obtained for toe nails. For the control group of children, the finger nails presented different levels of Br, Cl, Cr, Cu and Fe from those obtained for the toe nails and in the case of control group of adults, significant differences were obtained for Cr, Cl, Cu, K, Mg and Se. Concentrations of elements found in nails from control group of children were significantly different from those obtained for CF group for some elements. These two groups of individuals presented different concentrations of Br and Cr for toe nails and of Cl, Cr, K and Na for finger nails. The highest levels obtained for Cl and Na in nails from CF patients indicate the viability of using these analysis in the diagnosis of this disease. Comparisons between the results of nail samples from control group of children with those obtained for adults also indicated significant differences. Besides, the levels of the elements obtained in this work for nail samples from CF and control groups are within the range values presented in the literature. The elemental concentrations obtained in the analysis of hair samples indicated a good correlation with those obtained for nail samples. (author)

  9. Evaluation of mechanical strength and hydrate products evolution of calcium aluminate cement, for endodontic applications; Avaliacao da evolucao da resistencia mecanica e dos produtos de hidratacao de um cimento de aluminato de calcio, visando sua aplicacao em endodontia

    Energy Technology Data Exchange (ETDEWEB)

    Luz, A.P.; Borba, N.Z.; Pandolfelli, V.C., E-mail: anapaula.light@gmail.com, E-mail: vicpando@power.ufscar.br [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil). Departamento de Engenharia de Materiais

    2011-07-01

    Mineral trioxide aggregate (MTA) is the most used retrograde filling cement in the endodontic area. Nevertheless, although its composition is similar to the conventional Portland cement, its high cost, long setting time and low mechanical strength have led to a continuous search for new alternative materials. Considering these aspects, the mechanical strength and crystalline phase evolution of a calcium aluminate cement (CAC), during its hydration process, have been evaluated in this work aiming to apply such material for endodontic treatments. Secar 71 cement samples were prepared and kept in contact with water or SBF (simulated body fluid) during 15 days at 37 deg C. Compressive strength, apparent porosity, X ray diffraction and thermogravimetric tests were carried out for the samples evaluation after 1, 3, 7 and 15 days. The main identified phases were CAH{sub 10}, C{sub 2}AH{sub 8}, C{sub 3}AH{sub 6} and AH{sub 3}. Moreover, when in the presence of SBF, some changes in the amount of the hydrates in the CAC samples were observed, which affected the mechanical behavior of the cement. (author)

  10. A study of digital hardware architectures for nuclear reactors protection systems applications - reliability and safety analysis methods; Um estudo de arquiteturas de hardware para aplicacao em sistemas digitais de protecao de reatores nucleares - metodos de analise de confiabilidade e seguranca

    Energy Technology Data Exchange (ETDEWEB)

    Benko, Pedro Luiz

    1997-07-01

    A study of digital hardware architectures, including experience in many countries, topologies and solutions to interface circuits for protection systems of nuclear reactors is presented. Methods for developing digital systems architectures based on fault tolerant and safety requirements is proposed. Directives for assessing such conditions are suggested. Techniques and the most common tools employed in reliability, safety evaluation and modeling of hardware architectures is also presented. Markov chain modeling is used to evaluate the reliability of redundant architectures. In order to estimate software quality, several mechanisms to be used in design, specification, and validation and verification (V and V) procedures are suggested. A digital protection system architecture has been analyzed as a case study. (author)

  11. Synthesis and chemical modification of polymeric resins for the treatment of cations and aromatic hydrocarbons in produced oily water; Sintese de modificacao quimica de resina polimerica e aplicacao na remocao de cations e hidrocarbonetos aromaticos presentes em agua produzida

    Energy Technology Data Exchange (ETDEWEB)

    Aversa, Thiago M.; Rodrigues, Monique F.; Vieira, Helida V.P.; Queiros, Yure G.C.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas, Lab. de Macromoleculas e Coloides na Industria do Petroleo, Rio de Janeiro, RJ (Brazil)], e-mail: thiagoaversa@ima.ufrj.br

    2011-07-01

    The use of chemically modified resins in oily water treatment process is not very developed yet. Because of this, this work suggests to study the styrene and divinylbenzene sulfonation effect on oil and grease, aniline and calcium removal from the water. The aniline, oils and greases belong to a class of toxic organic compounds, with the Brazilian maximum limits established for disposal in CONAMA 393/2007, while the calcium ions belong to the group of cations of alkaline earth metals which improve hardness to the water, may cause fouling as carbonates and sulfates form. By using sulfonated resins in oily water treatment it is possible to remove not only oils and greases but also calcium and aniline. These kinds of polar compounds are removed because of the cation exchange capacity of resin. (author)

  12. Analytical calculation of small-angle multiple scattering and their applications in proton beam tomography;Calculo analitico do espalhamento multiplo a baixo angulo e sua aplicacao em tomografia com protons

    Energy Technology Data Exchange (ETDEWEB)

    Inocente, G.F.; Silva, D.A.A.; Pazianotto, M.T.; Calabresi, M.F.F.; Hormaza, J.M. [UNESP, Botucatu, SP (Brazil). Inst. de Biocencias. Dept. de Fisica e Biofisica

    2009-07-01

    By the theory of small-angle multiple scattering we have discussed an expression to determine the RMS scattering angle when energy loss is not considered. Also a correction to the standard Rossi formula of multiple scattering angle was derived. The values of the correction factor were calculated for protons. The values of the RMS scattering angle and the RMS lateral displacement were calculated for a proton beam passing through an homogeneous matter, in this case water, with large application comparing biological systems. The energy range was from 180 to 250 MeV, the interested region for proton beam tomography (pCT). A relevant result for protons shows the correction of energy loss in each slice of thick targets cannot be negligible. This work is part of a study to implements a formalism of image reconstruction obtained through a proton beam tomography prototype. (author)

  13. Gamma-ray and electrical resistivity measurements in soil with application of carbonatite and agricultural fertilizers in Distrito Federal; Radiacao gama e resistividade eletrica em solo com aplicacao de carbonatito e fertilizantes agricolas no Distrito Federal

    Energy Technology Data Exchange (ETDEWEB)

    Nascimento, Carlos Tadeu Carvalho do; Gaspar, Jose Carlos; Pires, Augusto Cesar Bittencourt, E-mail: carlostadeu@unb.br, E-mail: gasp@unb.br, E-mail: acbpires@unb.br [Instituto de Geociencias, Universidade de Brasilia, DF (Brazil); Ferreira, Francisco Jose Fonseca, E-mail: francisco.ferreira@ufpr.br [Departamento de Geologia, Universidade Federal do Parana, Curitiba, PR (Brazil); Andrade, Leide Rovenia Miranda de, E-mail: leide@cpac.embrapa.br [Empresa Brasileira de Pesquisa Agropecuaria, Centro de Pesquisa Agropecuaria dos Cerrados, Planaltina, DF (Brazil)

    2008-01-15

    EMBRAPA (Empresa Brasileira de Pesquisa Agropecuaria) and Brasilia University developed a research project about the viability of carbonatite rock as agricultural fertilizer. As an initial experiment, several mixtures of carbonatite, limestone, phosphorous and potassium compounds were added as fertilizers in an oxisol area (red-latosol, according with Brazilian System of Soil Classification), in Distrito Federal, central Brazil. The experiment area was divided in 56 plots (4 x 7m) and each plot received a fertilizer mixture. The purpose of this work was to verify if the addition of fertilizer mixture to the soil modified its radiometric and resistivity properties and if it is possible to identify this change. Gamma-ray and electrical resistivity measurements were obtained in an experimental area and in a natural savannah type vegetation area. The results showed that the fertilizer addition modified soil natural properties causing a small increase in K, U, Th levels and decreasing ten times electrical resistivity. A low contrast of radiation was observed between plots, and then it was not possible to differentiate the several treatments in base of gamma-ray measurements. Electrical resistivity was efficient to identify three groups of plots related to mixtures characteristics, respectively with phosphorous, potassium and limestone / carbonatite predominance. (author)

  14. Chemical synthesis of composite HML / PDMcT / PAni and its application as the trhiodan adsorbent in aqueous solutions; Sintese quimica de compositos de HML/PDMcT/PAni e sua aplicacao como adsorvente do trhiodan em solucoes aquosas

    Energy Technology Data Exchange (ETDEWEB)

    Girotto, L.G.; Pacheco, I.; Freitas, L.L. de; Oliveira, R.S.; Amaral, F.A. do; Canobre, S.C., E-mail: aylagg.eab@gmail.com [Universidade Federal de Uberlandia (UFU), MG (Brazil). Instituto de Quimica

    2016-07-01

    The mixed hydroxide lamellar [Co -Al- Cl] was synthesize by the co- precipitation method constant pH 8. The synthesis composite HML/PDMcT/PAni was carried out via chemical. The DRX composite HML/PDMcT/PAni showed that one amorphicity in the conductor polymer doesn't hid the diffraction peaks characteristic of HML. The MEV micrographs of composite HDL / PDMcT / PAni showed a large number of crystallites compacts with several shapes characteristic to PDMcT and nanofibers of polyaniline indicating an association between the different constituents forming the composite. The results of the adsorption was 98% of the pesticide in the composite HML / PDMcT / PAni , the composite can contribute so significantly to one Thiodon withdrawal in contaminated pesticide waters. (author)

  15. Non-isolated DC-AC converter with high voltage gain for autonomous systems of electric power; Conversor CC-CA nao isolado com alto ganho de tensao para aplicacao em sistemas autonomos de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, George Cajazeiras [Centro Federal de Educacao Tecnologica do Ceara (CEFET/CE), Fortaleza, CE (Brazil); Torrico-Bascope, Rene P. [Universidade Federal do Ceara (PPGEE/UFC), Fortaleza, CE (Brazil). Programa de Pos Graduacao em Engenharia Eletrica; Borges Neto, Manuel Rangel [Centro Federal de Educacao Tecnologica de Petrolina (CEFET-PET), PE (Brazil)

    2008-07-01

    A non-isolated DC-AC converter with high voltage gain with two output sinusoidal voltage - 110 V and 220 V - and frequency 60 Hz for application in autonomous systems of electric power is proposed in this work. This topology consists of a boost converter with high voltage gain, based on three-state switching cell combined with a double half bridge inverter. This configuration type the size and the cost are reduced and the efficiency is gotten better, due to the reduced number of switches. The converters that compose this topology operate with high frequency, reducing the volume of the magnetic materials. can be mention as important characteristics: the voltage stress across the switches of the boost converter are low, due they be naturally clamped by one output filter capacitor, which allows the utilization of switches with lower conduction resistances, and the waveforms of the output voltage of the double half bridge inverter supplies for the load it is sinusoidal and it possesses low harmonic content. (author)

  16. Application of relative permeability modifier additives to reduce water production in different formations; Aplicacao de aditivos modificadores de permeabilidade relativa para reducao da producao de agua em diferentes formacoes

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Ricardo C.B.; Torres, Ricardo S.; Pedrosa Junior, Helio; Dean, Gregory [BJ Services do Brasil Ltda., RJ (Brazil)

    2004-07-01

    Today most oil companies would be better described as water companies. Total worldwide oil production averages some 75 million barrels per day and, while estimates vary, this is associated with the production of 300 - 400 million barrels of water per day. These values of approximately 5 - 6 barrels of water for every barrel of oil are quite conservative. In the United States, where many fields are depleted, the ratio of water-to-oil production is closer to 9 to 1. In some areas around the world, fields remain on production when the ratio is as high as 48 to 1. Numerous strategies, both mechanical and chemical, have been employed over the years in attempts to achieve reduction in water production. Simple shut-off techniques, using cement, mechanical plugs and cross-linked gels have been widely used. Exotic materials such as DPR (disproportionate permeability reducers) and or new generation of relative permeability modifiers (RPM) have been applied in radial treatments with varying degrees of success. Most recently 'Conformance Fracturing' operations have increased substantially in mature fields as the synergistic effect obtained by adding a RPM to a fracturing fluid have produced increased oil production with reduced water cut in one step, consequently eliminating the cost of additional water shut off treatment later on. This paper presents laboratory testing and worldwide case histories of applications of various RPM materials, at different permeability and temperatures. The paper also describes technical design and operational methodology that we believe to have a significant impact in the development strategies of many fields worldwide. (author)

  17. Scaffold of chitosan/poly(vinyl alcohol) blend chemically crosslinked by glutaraldehyde for tissue engineering applications;Constructos de blendas de quitosana/poli(alcool vinilico) reticulados quimicamente com glutaraldeido para aplicacao em engenharia de tecido

    Energy Technology Data Exchange (ETDEWEB)

    Costa Junior, Ezequiel de S., E-mail: escjr50@deii.cefetmg.b [Centro Federal de Educacao Tecnologica (DEM/CEFET/MG), Belo Horizonte, MG (Brazil). Dept. de Engenharia de Materiais; Laguardia-Nascimento, Mateus; Barbosa-Stancioli, Edel F. [Universidade Federal de Minas Gerais (ICB/UFMG), Belo Horizonte (Brazil). Inst. de Ciencias Biologicas. Dept. de Microbiologia; Mansur, Herman S., E-mail: hmansur@demet.ufmg.b [Universidade Federal de Minas Gerais (DEM/UFMG), Belo Horizonte (Brazil). Dept. de Engenharia Metalurgica

    2009-07-01

    Chitosan/PVA based films were chemically crosslinked by glutaraldehyde (GA) in order to achieve scaffolds for potential tissue engineering application. Both precursors and developed films were characterized by FTIR and XRD in order to determine the presence of chemicals groups and nanostructural order, respectively. The results have showed that the GA crosslinking have altered the crystallinity of the chitosan and the increase on the C=N bands and decreasing of NH{sub 2} bands suggest that Chitosan/GA crosslinking has preference to occur in the carbon 2 by Schiff's base. The mechanical properties, swelling behavior, degradation rate in vitro and cellular viability were compatible with the characteristic of an epithelial tissue. The material presented a toughness range from 1.4 to 34MJ/m3, swelling from 150% to 700% in 24h, degradation rate from 20% to 75% (wt%) in 24h and cellular viability in vitro above 60% compared to the cellular control. The developed scaffolds from the films have also showed swelling and degradation in vitro properties well-matched for biomedical applications in tissue engineering (author)

  18. NASVD and MNF techniques and your application noise reduction in gamma-ray spectrometric data; As tecnicas NASVD e MNF e sua aplicacao na reducao de ruidos em dados gamaespectrometricos

    Energy Technology Data Exchange (ETDEWEB)

    Cavallaro, Francisco de Assis, E-mail: assisfc@yahoo.com.br, E-mail: assis@agp-la.org [Departamento de Geologia Sedimentar e Ambiental, DGSA, Instituto de Geociencias, IG, Universidade de Sao Paulo, SP (Brazil); AGPLA, AeroGeoPhysica Latinoamerica, Sao Paulo, SP (Brazil); Portugal, Rodrigo S.; Bizuti, Ariathemis M., E-mail: portugal@ige.unicamp.br, E-mail: ambizuti@ige.unicamp.br [Departamento de Geologia e Recursos Naturais, DGRN, Instituto de Geociencias, IG, Universidade Estadual de Campinas, SP (Brazil); Silva, Adalene M., E-mail: adalene@unb.br [Universidade de Brasilia (UnB), DF (Brazil). Inst. de Geociencias. Dept. de Geoquimica e Recursos Minerais (GRM)

    2009-04-15

    The radioactive decay is a random process, and the measurement precision is ruled by statistical laws. The counting ratios of the profiles are always noisy when analyzed for short periods, such as one second per measurement. Corrections made at the end of conventional processing in the airborne gamma-ray spectrometric method data are not enough to remove and minimize, or even reduce considerably, the spectrum's originated noise. Two statistic methods that act locally in collected data, in the spectrum domain, have been suggested by literature to remove such remaining noises, the Noise-Adjusted Singular Value Decomposition - NASVD and Maximum Noise Fraction - MNF. These methods produce a significantly noise reduction. In this work both methods were applied in an area comprehended by two blocks, I and II, of the airborne survey that covers the west area of Mineral Province of Tapajos between Para and Amazon states. The filtered and non-filtered data with the NASVD and MNF techniques were processed with the Lasa's parameters. The comparison of results between maps and profiles shows that both methods are valuable, since there was resolution gain in these products. (author)

  19. Partner's interest conflict analysis in distribution of natural gas: a game theory approach; Analise de conflitos de interesse na distribuicao de gas natural em areas urbanas: uma aplicacao da teoria dos jogos

    Energy Technology Data Exchange (ETDEWEB)

    Prata, Bruno de Athayde; Arruda, Joao Bosco Furtado [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Nucleo de Pesquisa em Logistica, Transporte e Desenvolvimento

    2004-07-01

    The use of Natural Gas is nowadays increasing in Brazilian scene and this fact shows the necessity of effective planning tasks in that sector. In the case of Natural Gas Vehicular (NGV) distribution one can face problems of actor's (distributor, retailers, customers and non-users) point of view conflicts and fuel stations expand in most Brazilian urban areas in an uncontrolled way, despising counties regulation on land use. This paper reports a study using a model based in Game Theory concepts to determine some key-variables as the number of fuel stations which must deliver NGV in a given study area. Although some information could not be available the results of simulation shows the usefulness of using such an approach to give solutions to distribution questions in NGV sector. The model was applied to the case of a district in Fortaleza city which is the study area of a project entitled Projeto GASLOG presently on process under the sponsoring of Brazilian Government, PETROBRAS and Brazilian GasEnergy Research Network. (author)

  20. Detection of outliers by neural network on the gas centrifuge experimental data of isotopic separation process; Aplicacao de redes neurais para deteccao de erros grosseiros em dados de processo de separacao de isotopos de uranio por ultracentrifugacao

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Monica de Carvalho Vasconcelos

    2004-07-01

    This work presents and discusses the neural network technique aiming at the detection of outliers on a set of gas centrifuge isotope separation experimental data. In order to evaluate the application of this new technique, the result obtained of the detection is compared to the result of the statistical analysis combined with the cluster analysis. This method for the detection of outliers presents a considerable potential in the field of data analysis and it is at the same time easier and faster to use and requests very less knowledge of the physics involved in the process. This work established a procedure for detecting experiments which are suspect to contain gross errors inside a data set where the usual techniques for identification of these errors cannot be applied or its use/demands an excessively long work. (author)

  1. TRUSSPOLE - Trussed Metallic Pole. Results of its application in 69 kV TL - simple circuit; Trusspole: poste metalico trelicado. Resultados da aplicacao em LT 69kV - circuito simples

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Paulo Ricardo Ralo Liberato da; Mello, Reynaldo Castriota de; Ferreira, Sirio Jose; Cadete, Marcia Augusta de Moura [MJMS - Mendes Junior Montagens e Servicos Ltda., Santa Luzia, MG (Brazil); Souza, Mauro Dias de [EGEL - Engenharia e Construcoes Ltda. (Brazil); Dantas, Roberto Pires [PLT - Projetos de Linhas de Transmissao Ltda. (Brazil)

    1995-12-31

    This report describes the origin, the development and the results of the TRUSSPOLE(Trussed Metallic Post) application in electric power transmission systems. It concerns a spatial trussed structure with a single metallic basis, similar to the concrete or wood pole, able to associate the technical and economical advantages of the trussed structures and the tubular or solid thick poles. The results obtained in the project, in load experiments of a study initial prototype and in the construction of a 69 kV Cs transmission line, with a 53.2 Km extension, using this type of structural solution, are shown 5 refs., 4 figs., 3 tabs.

  2. Study of dose modulation system and its application in the process of optimization and in multi cuts systems; Estudo do sistema de modulacao de doses e sua aplicacao no processo de otimizacao e em sistemas multicortes

    Energy Technology Data Exchange (ETDEWEB)

    Delduck, R.S.; Silveira, V.C.; Kodlulovich, S., E-mail: simone@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Oliveira, L.C. [Universidade Federal do Rio de Janeiro (CT/UFRJ), RJ (Brazil). Centro de Tecnologia

    2011-07-01

    Radiation protection has been more important over the years.The doses in routine examinations of the abdomen, using dose modulation system, increased significantly. As the computed tomography is a technique of high-dose radiation when compared with other imaging techniques.This project was developed in a clinic in Rio de Janeiro. The scanner was Philips Brilliance 64.The systems of automatic control exposure were evaluated, taking into account the levels of noise factors and the techniques used in routine examinations of the abdomen. In tests, the patient doses were compared to reference dose of Impact, the information in the console. Also was evaluate the different results using the dosimetric phantoms oval and elliptical. The values obtained for the weighted indices of kerma, kerma product volume and product kerma scan showed all was below the same when done with dose modulation. (author)

  3. Implanted of Pb-Pb methodology in whole rock: examples of use in Carajas Mineral Province, Para State; Implantacao da metodologia Pb-Pb em rocha total: exemplos de aplicacao na Provincia Mineral de Carajas (PA)

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Elizabeth Maria Soares

    1992-12-31

    This work presents the first data obtained by Pb-Pb systematics in whole rock and separated minerals. The Pb isotopic compositions of samples were determined by mass spectrometry. The average analytical errors of the ratios {sup 206} Pb/ {sup 204} Pb, {sup 207} Pb/ {sup 204} Pb and {sup 208} Pb/ {sup 209} Pb were 0.10%, 0.12% and 0.15%, respectively. The age calculation in the {sup 207} Pb/ {sup 204} Pb x {sup 206} Pb/ {sup 204} Pb diagram was obtained by York (1969) and Ludwig (1900). In order to verify the efficiency of the implanted methodology, 5 rocks from of the Carajas Mineral Province and Sao Felix do Xingu Region were dated. The Velho Guilherme granite, intrusive into the granite-greenstone terrains of Tucuma Region (PA), provided a Pb-Pb crystallization age (11 WR,2 FELD) of 1874 {+-} 15 Ma with MSWD = 1.53 and {mu} {sub 1} = 8.9 {+-} 0.07 (single stage). The Granulitic rocks of Pium complex (Catete area), located at the SW of Serra dos Carajas, provided a Pb-Pb age of 3044 {+-} 64 Ma with MSWD = 28.72 and {mu}{sub 1} = 9.2 {+-} .58. In the Rio Maria Region, Mata Surrao monzogranite which cross cut the gneiss basement and associated to the greenstone belts, defined a crystallization Pb-Pb (8 WR) age of 2876 {+-} 10 Ma with MSWD = 3.71 and {mu}{sub 1} = 8.2 {+-} 0.11. In the same region, the Metabasalts of the Identidade greenstone belt, (Andorinhas supergroup), showed a Pb-Pb age in whole rock (7 samples) of 3400 {+-} 109 Ma with MSWD = 7.97 and {mu}{sub 1} = 9.6 {+-} 1.44. Five whole rock samples from metadacites, located in the central part of the Identidade greenstone, provided a crystallization age of 2944 {+-} 88 Ma with MSWD 31.52 and {mu}{sub 1} = 8.2 {+-} .70. The results obtained in this work emphasize the high potentiality of the Pb-Pb method of dating to obtain crystallization ages of Precambrian rocks. (author). 69 refs., 23 figs., 12 tabs.

  4. Application of field-bus to interface field instrumentation in hazardous areas of TRANSPETRO pipelines and terminals, Sao Paulo region; Aplicacao de barramento de campo (fieldbus) em areas classificadas nos dutos e terminais da TRANSPETRO, regiao de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Corcioli, Mario Sergio [PETROBRAS Transporte S.A. (TRANSPETRO), Rio de Janeiro, RJ (Brazil)

    2005-07-01

    The following presentation focuses on the experiences that we have been adopting with success during the past seven (7) years at the TRANSPETRO Pipelines and Terminals, in the State of Sao Paulo region, to integrate the field instruments (switches, actuators, solenoid valves, motor starter and switchgear panels, and so on) installed in the hazardous areas, to Programmable Logic Controllers (PLC) connected to Remote Input and Output Modules (I/O) in the hazardous area, designated to interface the field signals and condition them to communicate via a bus in the field (field bus), making use of a standard open type industrial communication bus - PROFIBUS DP V1, under which the independent manufacturers follow the industrial Standards EN50170 and EN50254, pointing out the advantages of the application of this instrumentation philosophy, that among other philosophies, allows the use of engineering tools for the asset management and to assist the maintenance and operation of industrial plants. (author)

  5. Deployment case study of a global applied 3D modeling process of pipe supports; Estudo de caso da aplicacao de uma ferramenta para automatizacao e controle do processo de modelagem de suportes para tubulacoes em maquetes 3D

    Energy Technology Data Exchange (ETDEWEB)

    Balbi, Diego Junca Gonzaga; Oliveira, Renato Fonseca; Pinto, Rogerio Dias [Promon Engenharia, Sao Paulo, SP (Brazil)

    2012-07-01

    An activity in engineering projects has been changed over the past two decades with regarding to working practices. Difficulties arising from the increasing complexity of projects, especially in industrial sectors, have taken this activity a constant search for new methods and tools which enable increased speed in performing tasks of daily life of the project. Currently, the development of these tools has been based on a friendlier interface to the end user, minimizing the need for extensive and repetitive training. Moreover, the industry responsible for this development of these kind of tools is still in the search for knowledge in order to explore the plain capabilities within wide projects on solutions offered. This article deals with one of these innovations on the spotlight, besides of being not a technology issue. It's based on the same basic platform available since the creation of models used together with databases. However, this new vision of work inserts one more specialty in the virtual designing of structures to support industrial pipes, as well as other design disciplines, nor taken advantage of these capabilities with regard to the generation of information, its control and management. (author)

  6. Electrical resistivity of ceramic-metal composite materials in the percolation region: application in crucibles for induction furnaces; Resistividade eletrica de materiais compositos do tipo ceramica-metal na regiao de percolacao: aplicacao em cadinhos para fornos de inducao

    Energy Technology Data Exchange (ETDEWEB)

    Sene, Frank Ferrer

    1997-07-01

    Ceramic composite materials were produced by mixing powders of Partially Stabilized (PSZ) with titanium, niobium or nickel, and cristobalite with titanium. Pellets were produced by uniaxially pressing the material followed by cold isostatic pressing and finally sintering at 1600 deg C for 1,5 hours in argon. The metal content was varied in the range of 0-40 volume percent (v/o). Electrical resistivity measurements were performed in the temperature range of 25 - 700 deg C. Samples containing metallic inclusions above 25 v/o show the predominance of electronic type conducting. For samples with metallic inclusion below 25 v/o, a typically ionic conduction behavior has been observed. PSZ-Ti and PSZ-Ni samples containing 25 v/o of metallic inclusions show an insulator - conductor transition in a given temperature range. Cristobalite samples containing 30 v/o of titanium show a conductor - insulator transition also in a specific temperature range. Tests performed in an induction furnace showed that samples containing metallic inclusions above 25 v/o had self-heated when exposed to electro magnetic fields in the range of radio frequency (r.f.) Crucibles of PSZ-Ti were made by slip casting followed by sintering at 1600 deg C for 1.5 hours in argon. These crucibles were exposed to electromagnetic fields in the r.f. range and the maximum temperature reached was 1350 deg C. Microstructure characterization was performed on those materials by X-ray diffraction, EDS, optical and scanning electron microscopy. (author)

  7. Integration of three-dimensional modelling, scientific visualization and virtual reality applied to electric power substations; Integracao de modelagem tridimensional, visualizacao cientifica e realidade virtual com aplicacao em subestacoes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Buriol, Tiago Martinuzzi; Scheer, Sergio [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Centro de Estudos de Engenharia Civil]. E-mails: tiagoburiol@gmail.com; scheer@ufpr.br

    2007-04-15

    The Virtual Reality technology (VR) is considered the most advanced human/computer interface ever known, with applications in several fields of science and engineering. In the energy sector, research has been carried out aiming at applying this technology in planning, training and simulation activities. In this work a few possible VR applications related to power substations are presented. Aspects of modelling, navigation, and scientific visualization are addressed. In addition, an application for the visualization of illuminance fields is presented. (author)

  8. Constituents from <em>Vigna em>vexillata> and Their Anti-Inflammatory Activity

    Directory of Open Access Journals (Sweden)

    Guo-Feng Chen

    2012-08-01

    Full Text Available The seeds of <em>Vigna em>genus are important food resources and there have already been many reports regarding their bioactivities. In our preliminary bioassay, the chloroform layer of methanol extracts of<em> V. vexillata em>demonstrated significant anti-inflammatory bioactivity. Therefore, the present research is aimed to purify and identify the anti-inflammatory principles of <em>V. vexillataem>. One new sterol (1 and two new isoflavones (2,3 were reported from the natural sources for the first time and their chemical structures were determined by the spectroscopic and mass spectrometric analyses. In addition, 37 known compounds were identified by comparison of their physical and spectroscopic data with those reported in the literature. Among the isolates, daidzein (23, abscisic acid (25, and quercetin (40 displayed the most significant inhibition of superoxide anion generation and elastase release.

  9. Teor e composição química do óleo essencial de Hyptis marrubioides Epl., Lamiaceae em função da sazonalidade = Content and chemical composition of Hyptis marrubioides essential oil in function of seasons

    Directory of Open Access Journals (Sweden)

    Suzan Kelly Vilela Bertolucci

    2010-07-01

    Full Text Available Os oleos essenciais sao principios odoriferos armazenados em celulas especiais da planta. O oleo essencial no genero Hyptis e usado como anestesico, antiespasmodico, antiinflamatorio e pode induzir aborto em doses elevadas. O objetivo deste trabalho foi avaliar a influencia da sazonalidade no teor e composicao do oleo essencial de Hyptis marrubioides. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos (inverno, primavera, verao e outono e seis repeticoes, totalizando 60 plantas. O oleo essencial foi extraido por hidrodestilacao, em aparelho de Clevenger. A analise qualitativa do oleo essencial foi por cromatografia em fase gasosa (CG/EM. Na estacao do verao, as folhas das plantas de H. marrubiodes apresentaram os maiores teores de oleo essencial. Nas demais estacoes, os teores de oleo essencial obtidos foram semelhantes entre si. Os componentes majoritarios no oleo essencial foram os monoterpenoides α-tujona e β-tujona. As concentracoes relativas dos picos correspondentes a β-tujona nao apresentaram diferencas consideraveis nas quatro estacoes. Os sesquiterpenoides oxigenados (cedrol e cariofilenol e nao-oxigenados (α-copaeno, β-cariofileno, germacreno D e cadaleno foram encontrados em menores quantidades no oleo essencial, entretanto observam-se diferencas quantitativas ao longo das estacoes.Essential oils are odorous principles stored in special plant cells. The essential oil in the Hyptis genus is traditionally used as an anesthetic, antispasmodic, antiinflammatory, and can induce abortion in high doses. The purpose of this work was to evaluate the influence of seasons in essential oil content and chemical composition of species H. marrubioides. A completely randomized complete design was used with four treatments (winter, spring, summer and autumn and six replications, totaling 60 plants. The essential oil was obtained by hydrodistillation with a Clevenger apparatus. The qualitative analysis of the

  10. Dermatoses em renais cronicos em terapia dialitica

    Directory of Open Access Journals (Sweden)

    Luis Alberto Batista Peres

    2014-03-01

    Full Text Available Objetivo: As desordens cutâneas e das mucosas são comuns em pacientes em hemodiálise a longo prazo. A diálise prolonga a expectativa de vida, dando tempo para a manifestação destas anormalidades. Os objetivos deste estudo foram avaliar a prevalência de problemas dermatológicos em pacientes com doença renal crônica (DRC em hemodiálise. Métodos: Cento e quarenta e cinco pacientes com doença renal crônica em hemodiálise foram estudados. Todos os pacientes foram completamente analisados para as alterações cutâneas, de cabelos, mucosas e unhas por um único examinador e foram coletados dados de exames laboratoriais. Os dados foram armazenados em um banco de dados do Microsolft Excel e analisados por estatística descritiva. As variáveis contínuas foram comparadas pelo teste t de Student e as variáveis categóricas utilizando o teste do qui-quadrado ou o teste Exato de Fischer, conforme adequado. Resultados: O estudo incluiu 145 pacientes, com idade média de 53,6 ± 14,7 anos, predominantemente do sexo masculino (64,1% e caucasianos (90,0%. O tempo médio de diálise foi de 43,3 ± 42,3 meses. As principais doenças subjacentes foram: hipertensão arterial em 33,8%, diabetes mellitus em 29,6% e glomerulonefrite crônica em 13,1%. As principais manifestações dermatológicas observadas foram: xerose em 109 (75,2%, equimose em 87 (60,0%, prurido em 78 (53,8% e lentigo em 33 (22,8% pacientes. Conclusão: O nosso estudo mostrou a presença de mais do que uma dermatose por paciente. As alterações cutâneas são frequentes em pacientes em diálise. Mais estudos são necessários para melhor caracterização e manejo destas dermatoses.

  11. EM International. Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    1993-07-01

    It is the intent of EM International to describe the Office of Environmental Restoration and Waste Management`s (EM`s) various roles and responsibilities within the international community. Cooperative agreements and programs, descriptions of projects and technologies, and synopses of visits to international sites are all highlighted in this semiannual journal. Focus on EM programs in this issue is on international collaboration in vitrification projects. Technology highlights covers: in situ sealing for contaminated sites; and remote sensors for toxic pollutants. Section on profiles of countries includes: Arctic contamination by the former Soviet Union, and EM activities with Germany--cooperative arrangements.

  12. Mitochondrial cytochrome <em>B> sequence divergence among Spanish, Alpine and Abruzzo chamois (genus <em>Rupicapra>

    Directory of Open Access Journals (Sweden)

    Nadia Mucci

    1998-12-01

    Full Text Available Abstract We have studied genetic divergence and phylogenetic relationships of Alpine, Spanish and Abruzzo chamois (genus <em>Rupicapra> by sequencing a region of 330 nucleotides within the mitochondrial DNA cytochrome <em>b> gene (mtDNA cyt <em>b>. These sequences were aligned with additional homologous sequences of Caprinae: Japanese serow, Chinese goral, Canadian mountain goat, Mishmi takin, muskox, Sardinian mouflon and domestic goat. Results suggest that, using representatives of the Bovini as outgroups, the Caprinae constitute a monophyletic clade. However, inferred phylogenetic relationships among and within tribes of Caprinae were poorly defined and did not reflect current evolutionary and taxonomical views. In fact, the Asian Rupicaprini goral and serow constituted a strongly supported clade, which included the muskox, while the takin grouped with <em>Ovis>. Therefore, the monophyly of Ovibovini was not supported by cyt <em>b> sequences. Species of <em>Rupicapra> joined a strongly supported monophyletic clade, which was distantly related to the Asian rupicaprins and <em>Oreamnos>. Therefore, the monophyly of the Rupicaprini was not supported by these cyt <em>b> sequences. There were sister species relationships within <em>Rupicapra>, Spanish and Alpine chamois and the Abruzzo chamois (<em>Rupicapra pyrenaica ornataem> was strictly related to the Spanish chamois (<em>Rupicapra pyrenaica parvaem>, as previously suggested by allozyme data and biogeographic reconstructions.

  13. New Trifluoromethyl Triazolopyrimidines as Anti-<em>Plasmodium> <em>falciparum> Agents

    Directory of Open Access Journals (Sweden)

    Núbia Boechat

    2012-07-01

    Full Text Available According to the World Health Organization, half of the World’s population, approximately 3.3 billion people, is at risk for developing malaria. Nearly 700,000 deaths each year are associated with the disease. Control of the disease in humans still relies on chemotherapy. Drug resistance is a limiting factor, and the search for new drugs is important. We have designed and synthesized new 2-(trifluoromethyl[1,2,4]triazolo[1,5-<em>a>]pyrimidine derivatives based on bioisosteric replacement of functional groups on the anti-malarial compounds mefloquine and amodiaquine. This approach enabled us to investigate the impact of: (i ring bioisosteric replacement; (ii a CF3 group substituted at the 2-position of the [1,2,4]triazolo[1,5-<em>a>]pyrimidine scaffold and (iii a range of amines as substituents at the 7-position of the of heterocyclic ring; on <em>in vitroem> activity against <em>Plasmodium falciparumem>. According to docking simulations, the synthesized compounds are able to interact with <em>P. falciparumem> dihydroorotate dehydrogenase (<em>Pf>DHODH through strong hydrogen bonds. The presence of a trifluoromethyl group at the 2-position of the [1,2,4]triazolo[1,5-<em>a>]pyrimidine ring led to increased drug activity. Thirteen compounds were found to be active, with IC50 values ranging from 0.023 to 20 µM in the anti-HRP2 and hypoxanthine assays. The selectivity index (SI of the most active derivatives 5, 8, 11 and 16 was found to vary from 1,003 to 18,478.

  14. Genotoxicity of <em>Euphorbia hirtaem>: An <em>Allium cepaem> Assay

    Directory of Open Access Journals (Sweden)

    Kwan Yuet Ping

    2012-06-01

    Full Text Available The potential genotoxic effects of methanolic extracts of <em>Euphorbia hirta em>which is commonly used in traditional medicine to treat a variety of diseased conditions including asthma, coughs, diarrhea and dysentery was investigated using <em>Allium cepaem> assay. The extracts of 125, 250, 500 and 1,000 µg/mL were tested on root meristems of <em>A. cepaem>. Ethylmethanesulfonate was used as positive control and distilled water was used as negative control. The result showed that mitotic index decreased as the concentrations of <em>E. hirtaem> extract increased. A dose-dependent increase of chromosome aberrations was also observed. Abnormalities scored were stickiness, c-mitosis, bridges and vagrant chromosomes. Micronucleated cells were also observed at interphase. Result of this study confirmed that the methanol extracts of <em>E. hirta em>exerted significant genotoxic and mitodepressive effects at 1,000 µg/mL.

  15. Cultivation and irradiation of human fibroblasts in a medium enriched with platelet lysate for obtaining feeder layer in epidermal cell culture; Cultivo e irradiacao de fibroblastos humanos em meio enriquecido com lisado de plaquetas para obtencao de camada de sustentacao em culturas de celulas da epiderme

    Energy Technology Data Exchange (ETDEWEB)

    Yoshito, Daniele

    2011-07-01

    For over 30 years, the use of culture medium, enriched with bovine serum, and murines fibroblasts, with the rate of proliferation controlled by irradiation or by share anticarcinogenic drugs, has been playing successfully its role in assisting in the development of keratinocytes in culture, for clinical purposes. However, currently there is a growing concern about the possibility of transmitting prions and animals viruses to transplanted patients. Taking into account this concern, the present work aims to cultivate human fibroblasts in a medium enriched with human platelets lysate and determine the irradiation dose of these cells, for obtaining feeder layer in epidermal cell culture. For carrying out the proposed objective, platelets lysis has standardized, this lysate was used for human fibroblasts cultivation and the irradiation dose enough to inhibit its duplication was evaluated. Human keratinocytes were cultivated in these feeder layers, in culture medium enriched with the lysate. With these results we conclude that the 10% platelets lysate promoted a better adhesion and proliferation of human fibroblasts and in all dose levels tested (60 to 300 Gy), these had their mitotic activity inactivated by ionizing irradiation, being that the feeder layers obtained with doses from 70 to 150 Gy were those that provided the best development of keratinocytes in medium containing 2.5% of human platelet lysate. Therefore, it was possible to standardize both the cultivation of human fibroblasts as its inactivation for use as feeder layer in culture of keratinocytes, so as to eliminate xenobiotics components. (author)

  16. Study of the Nafion quantity effect in membrane and electrodes assemblies (MEAs) of 50 cm{sup 2} used in type proton exchange membrane (PEM) fuel cell operating with H{sub 2}/Air; Estudo do efeito da quantidade de Nafion em MEAs de 50 cm{sup 2} utilizadas em celula a combustivel tipo PEM operando com H{sub 2}/ar

    Energy Technology Data Exchange (ETDEWEB)

    Profeti, Demetrius; Colmati, Flavio; Carlindo, Adao A.J.; Paganin, Valdecir A.; Gonzalez, Ernesto R.; Ticianelli, Edson A. [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Inst. de Quimica]. E-mail: dprofeti@iqsc.usp.br

    2008-07-01

    The performance of a proton exchange membrane fuel cell (PEMFC) was investigated with the aim at characterizing the effects of the Nafion. content on the scale-up of the electrodes from 5 to 50 cm{sup 2}. It is observed that a diminution of the single cell performance occurred when the electrode area is increased from 5 to 50 cm{sup 2}. The tests carried out with different Nafion. contents, and fuel cell and humidifiers at the same temperature (T{sub cell}=T{sub H2}=T{sub air}=70 deg C) showed a slightly decrease of the fuel cell performance compared to the tests performed at different temperatures (T{sub cell}=70 deg C, T{sub H2}=85 deg C, T{sub air}=75 deg C). In the study of the variation on the Nafion. contents, the higher performance up to a current density of 0.8 A cm-2 is obtained with the 35.5 wt.% Nafion.. On the other hand, at higher current densities values, the performance of the fuel cells is very similar for the 31.0, 35.5 and 39.4 wt.% Nafion contents. (author)

  17. Use of phyllosilicates in electrochemical devices: possible use of sepiolite as a support of catalysts in direct alcohol fuel cells (DAFC); Utilizacao de filosilicatos em dispositivos eletroquimicos: possivel uso da sepiolita como suporte de catalisadores em celulas a combustivel com uso direto de etanol (DAFC)

    Energy Technology Data Exchange (ETDEWEB)

    Parra-Silva, J.; Silva, A.C.; Mello-Castanho, S.R.H. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Cerpa, A. [Universidad Europea de Madrid, Madrid (Spain)

    2014-07-01

    Direct alcohol Fuel cells (DAFC) are interesting to use Brazil for reasons of fuel logistics and availability. The catalysts used in these devices to promote the oxidation of alcohol at the anode need to be fixed on a substrate which must provide high specific surface area, porosity, chemical and thermal resistance, this target can be achieved with the characteristics sepiolite. This paper proposes sepiolite as catalyst support for DAFC. Sepiolite is a phyllosilicate with double layered tetrahedral silicon cells and fibrillar structure. Catalysts (Pt / Sb / Sn) were prepared by cation substitution method and tested by cyclic voltammetry. Techniques as XRD and FT-IR were also used for characterizing materials. Was obtained up to 35 mA / g (Pt) peak current (redox ethanol) indicating the possibility of sepiolite technology development to use un proposed purpose. (author)

  18. Emergency Medical Service (EMS) Stations

    Data.gov (United States)

    Kansas Data Access and Support Center — EMS Locations in Kansas The EMS stations dataset consists of any location where emergency medical services (EMS) personnel are stationed or based out of, or where...

  19. Especiação química do V(V) e W(VI) na presença de ácidos (amino)-hidroxâmicos em meio aquoso

    OpenAIRE

    Cristiano Torres Miranda

    2010-01-01

    A atividade biologica e farmacologica apresentada pelos acidos hidroxamicos e seus derivados, os quais podem atuar como antibioticos, inibidores tumorais e inibidores de divisao celular, alem da atividade insulinomimetica recentemente estudada, associada a capacidade de coordenar varios ions metalicos, tem despertado grande interesse nos ultimos anos. Compostos contendo vanadio(V) ou tungstenio(VI) foram caracterizados como insulino-mimeticos, porem a aplicacao direta dos sais destes eleme...

  20. <em>Angiostrongylus vasorumem> in red foxes (<em>Vulpes vulpesem> and badgers (<em>Meles melesem> from Central and Northern Italy

    Directory of Open Access Journals (Sweden)

    Marta Magi

    2010-06-01

    Full Text Available Abstract During 2004-2005 and 2007-2008, 189 foxes (<em>Vulpes vulpesem> and 6 badgers (<em>Meles melesem> were collected in different areas of Central Northern Italy (Piedmont, Liguria and Tuscany and examined for <em>Angiostrongylus vasorumem> infection. The prevalence of the infection was significantly different in the areas considered, with the highest values in the district of Imperia (80%, Liguria and in Montezemolo (70%, southern Piedmont; the prevalence in Tuscany was 7%. One badger collected in the area of Imperia turned out to be infected, representing the first report of the parasite in this species in Italy. Further studies are needed to evaluate the role played by fox populations as reservoirs of infection and the probability of its spreading to domestic dogs.
    Riassunto <em>Angiostrongylus vasorumem> nella volpe (<em>Vulpes vulpesem> e nel tasso (<em>Meles melesem> in Italia centro-settentrionale. Nel 2004-2005 e 2007-2008, 189 volpi (<em>Vulpes vulpesem> e 6 tassi (<em>Meles melesem> provenienti da differenti aree dell'Italia settentrionale e centrale (Piemonte, Liguria Toscana, sono stati esaminati per la ricerca di <em>Angiostrongylus vasorumem>. La prevalenza del nematode è risultata significativamente diversa nelle varie zone, con valori elevati nelle zone di Imperia (80% e di Montezemolo (70%, provincia di Cuneo; la prevalenza in Toscana è risultata del 7%. Un tasso proveniente dall'area di Imperia è risultato positivo per A. vasorum; questa è la prima segnalazione del parassita in tale specie in Italia. Ulteriori studi sono necessari per valutare il potenziale della volpe come serbatoio e la possibilità di diffusione della parassitosi ai cani domestici.

    doi:10.4404/hystrix-20.2-4442

  1. International EMS Systems

    DEFF Research Database (Denmark)

    Langhelle, Audun; Lossius, Hans Morten; Silfvast, Tom

    2004-01-01

    Emergency medicine service (EMS) systems in the five Nordic countries have more similarities than differences. One similarity is the involvement of anaesthesiologists as pre-hospital physicians and their strong participation for all critically ill and injured patients in-hospital. Discrepancies do...... exist, however, especially within the ground and air ambulance service, and the EMS systems face several challenges. Main problems and challenges emphasized by the authors are: (1) Denmark: the dispatch centres are presently not under medical control and are without a national criteria based system...... is the only country that has emergency medicine (EM) as a recognised speciality but there is a need for more fully trained specialists in EM; (4) Norway: the ordinary ground ambulance is pointed out as the weakest link in the EM chain and a health reform demands extensive co-operation between the new health...

  2. Life-cycle optimization model for distributed generation in buildings

    Science.gov (United States)

    Safaei, Amir

    principal objetivo desta tese de doutoramento foi desenvolver um modelo para otimizar o desenho e operacao de sistemas de GD para o setor da construcao de edificios comerciais em Portugal, considerando os respetivos Impactes de Ciclo de Vida (IAVC) e Custos de Ciclo de Vida (CCV), de modo a satisfazer as necessidades energeticas do edificio. Tres tipos de tecnologias de cogeracao (Micro-Turbinas, Motores de combustao interna, e Celulas combustiveis de Oxido solido), e dois tipos de tecnologias de energia solar, solar termica e fotovoltaica, constituem os sistemas de GD que sao acoplados aos sistemas convencionais. Foi desenvolvido um modelo de CV, tendo em conta todos os impactes relacionados com a construcao e operacao dos sistemas de energia, bem como os processos a montante relacionados com a producao do GN. Em particular, o mix de GN consumido em Portugal em 2011 foi identificado (60% da Nigeria, 40% da Argelia) e os impactes relativos a cada uma das vias de abastecimento foram avaliados separadamente para quatro categorias de impacte ambiental: Consumo de Energia Primaria (CEP), Gases com Efeito de Estufa (GEE), acidificacao, e eutrofizacao. Devido a importancia das emissoes de GEE na formulacao de politicas, foi tambem realizada uma analise de incerteza as emissoes de GEE do GN fornecido a Portugal. Foi desenvolvido um modelo matematico, em linguagem de Programacao General Algebraic Modeling System (GAMS), que utiliza os resultados da ACV dos sistemas de energia e as suas implicacoes economicas para minimizar o CCV e IACV ao longo de um horizonte de planeamento definido pelo decisor. Foram derivadas fronteiras otimas de Pareto, representando as relacoes entre o tipo de IACV (CEP, GEE, acidificacao, eutrofizacao) e CCV decorrentes da satisfacao das necessidades energeticas do edificio. Para aumentar a robustez do modelo, dada a incerteza dos precos dos combustiveis (GN e eletricidade), foi desenvolvido um modelo de custos robusto para os sistemas de GD, que e menos

  3. O ator em jogo

    OpenAIRE

    Daves Otani

    2005-01-01

    Resumo: O Ator em Jogo é uma reflexão pessoal sobre aspectos do processo criativo em dois espetáculos teatrais encenados pelo grupo Boa Companhia: PRIMUS (adaptado do conto "Comunicado a uma Academia", de Franz Kafka) e MISTER K. E OS ARTISTAS DA FOME (adaptado do conto "O artista da fome", de Kafka). Utilizando a experiência prática da capoeira, que serviu como matriz criativa nessas duas montagens, em cada uma a seu modo específico, faço uma reflexão a partir de um diário que relata experiê...

  4. International EMS Systems

    DEFF Research Database (Denmark)

    Langhelle, Audun; Lossius, Hans Morten; Silfvast, Tom

    2004-01-01

    exist, however, especially within the ground and air ambulance service, and the EMS systems face several challenges. Main problems and challenges emphasized by the authors are: (1) Denmark: the dispatch centres are presently not under medical control and are without a national criteria based system...... enterprises to re-establish a nation-wide air ambulance service; (5) Sweden: to create evidence based medicine standards for treatment in emergency medicine, a better integration of all part of the chain of survival, a formalised education in EM and a nation wide physician staffed helicopter EMS (HEMS) cover....

  5. International EMS Systems

    DEFF Research Database (Denmark)

    Langhelle, Audun; Lossius, Hans Morten; Silfvast, Tom

    2004-01-01

    . Access to on-line medical advice of a physician is not available; (2) Finland: the autonomy of the individual municipalities and their responsibility to cover for primary and specialised health care, as well as the EMS, and the lack of supporting or demanding legislation regarding the EMS; (3) Iceland...... exist, however, especially within the ground and air ambulance service, and the EMS systems face several challenges. Main problems and challenges emphasized by the authors are: (1) Denmark: the dispatch centres are presently not under medical control and are without a national criteria based system...

  6. Expression of Selected <em>Ginkgo em>>biloba em>Heat Shock Protein Genes After Cold Treatment Could Be Induced by Other Abiotic Stress

    Directory of Open Access Journals (Sweden)

    Feng Xu

    2012-05-01

    Full Text Available Heat shock proteins (HSPs play various stress-protective roles in plants. In this study, three <em>HSP> genes were isolated from a suppression subtractive hybridization (SSH cDNA library of <em>Ginkgo bilobaem> leaves treated with cold stress. Based on the molecular weight, the three genes were designated <em>GbHSP16.8em>, <em>GbHSP17em> and <em>GbHSP70em>. The full length of the three genes were predicted to encode three polypeptide chains containing 149 amino acids (Aa, 152 Aa, and 657 Aa, and their corresponding molecular weights were predicted as follows: 16.67 kDa, 17.39 kDa, and 71.81 kDa respectively. The three genes exhibited distinctive expression patterns in different organs or development stages. <em>GbHSP16.8em> and <em>GbHSP70em> showed high expression levels in leaves and a low level in gynoecia, <em>GbHSP17em> showed a higher transcription in stamens and lower level in fruit. This result indicates that <em>GbHSP16.8em> and <em>GbHSP70 em>may play important roles in <em>Ginkgo> leaf development and photosynthesis, and <em>GbHSP17em> may play a positive role in pollen maturation. All three <em>GbHSPs> were up-regulated under cold stress, whereas extreme heat stress only caused up-regulation of <em>GbHSP70em>, UV-B treatment resulted in up-regulation of <em>GbHSP16.8em> and <em>GbHSP17em>, wounding treatment resulted in up-regulation of <em>GbHSP16.8em> and <em>GbHSP70em>, and abscisic acid (ABA treatment caused up-regulation of <em>GbHSP70em> primarily.

  7. Atividade de três drogas antivirais sobre os herpesvírus bovino tipos 1, 2 e 5 em cultivo celular Activity of three antiviral drugs against bovine herpesviruses 1, 2 and 5 in cell culture

    Directory of Open Access Journals (Sweden)

    Renata Dezengrini

    2010-10-01

    Full Text Available A atividade de três fármacos antivirais (Aciclovir [ACV], Ganciclovir [GCV] e Foscarnet [PFA] foi testada in vitro frente aos herpesvírus bovino tipos 1 (BoHV-1, 2 (BoHV-2 e 5 (BoHV-5. Para isso, utilizou-se o teste de reducao de placas virais em cultivo celular, testando-se diferentes concentracoes dos farmacos frente a 100 doses infectantes para 50% dos cultivos celulares (DICC50 dos respectivos virus. Pelo teste de MTT (3-(4,5-Dimethylthiazol- 2-yl-2,5-diphenyltetrazolium bromide, verificou-se que concentracoes inferiores a 200ƒÊg/mL dos tres antivirais resultaram em indices de viabilidade de celulas MDBK e Hep2 superiores a 80%. Com base na concentracao citotoxica para 50% das celulas (CC50 e na concentracao dos farmacos efetiva para inibir em 50% o numero de placas virais (EC50, calculou-se o indice de seletividade (IS dos antivirais para os tres herpesvirus. Assim, o ACV demonstrou ser moderadamente ativo frente ao BoHV-1 (EC50: 112,9ƒÊg/mL e IS: 4,5, ao BoHV-2 (EC50: 114,2 ƒÊg/mL e IS: 4,5 e BoHV-5 (EC50: 96,9ƒÊg/mL e IS: 5,3. O GCV apresentou atividade moderada frente ao BoHV-2 (EC50: 33,5ƒÊg/mL e IS: 16,6 e, em menor grau, contra o BoHV-5 (EC50: 123,2ƒÊg/mL e IS: 4,5, sendo ineficaz frente ao BoHV-1 (EC50: 335,8ƒÊg/mL e IS: 1,7. O PFA apresentou atividade antiviral mais pronunciada, sendo o unico farmaco que, na concentracao de 100ƒÊg/mL, inibiu completamente a producao de placas pelos tres virus testados. O PFA foi o mais efetivo in vitro frente ao BoHV-1 (EC50: 29,5ƒÊg/mL e IS: 42,2, ao BoHV-2 (EC50: 45,2ƒÊg/mL e IS: 27,6 e ao BoHV-5 (EC50: 7,8ƒÊg/mL e IS: 160,6. Portanto, os resultados obtidos indicam que o PFA pode se constituir em um candidato para terapia experimental de infeccoes pelos herpesvirus de bovinos in vivo.The activity of three anti-herpetic drugs (Acyclovir [ACV], Gancyclovir [GCV] and Foscarnet [PFA] was tested against bovine herpesvirus 1 (BoHV-1, 2 (BoHV-2 and 5 (BoHV-5 in vitro using the

  8. <em>In Vitro em>and <em>in em>Vivo> Antitumor Effect of Trachylobane-360, a Diterpene from<em> Xylopia langsdorffianaem>

    Directory of Open Access Journals (Sweden)

    João Carlos Lima Rodrigues Pita

    2012-08-01

    Full Text Available Trachylobane-360 (<em>ent>-7α-acetoxytrachyloban-18-oic acid was isolated from <em>Xylopia langsdorffianaem>. Studies have shown that it has weak cytotoxic activity against tumor and non-tumor cells. This study investigated the <em>in vitroem>> em>and <em>in vivoem> antitumor effects of trachylobane-360, as well as its cytotoxicity in mouse erythrocytes. In order to evaluate the <em>in vivoem> toxicological aspects related to trachylobane-360 administration, hematological, biochemical and histopathological analyses of the treated animals were performed. The compound exhibited a concentration-dependent effect in inducing hemolysis with HC50 of 273.6 µM, and a moderate <em>in vitroem>> em>concentration-dependent inhibitory effect on the proliferation of sarcoma 180 cells with IC50 values of 150.8 µM and 150.4 µM, evaluated by the trypan blue exclusion test and MTT reduction assay, respectively. The <em>in vivoem> inhibition rates of sarcoma 180 tumor development were 45.60, 71.99 and 80.06% at doses of 12.5 and 25 mg/kg of trachylobane-360 and 25 mg/kg of 5-FU, respectively. Biochemical parameters were not altered. Leukopenia was observed after 5-FU treatment, but this effect was not seen with trachylobane-360 treatment. The histopathological analysis of liver and kidney showed that both organs were mildly affected by trachylobane-360 treatment. Trachylobane-360 showed no immunosuppressive effect. In conclusion, these data reinforce the anticancer potential of this natural diterpene.

  9. Chemical Composition and Insecticidal Activity Against <em>Sitophilus zeamaisem> of the Essential Oils Derived from <em>Artemisia giraldiiem> and <em>Artemisia subdigitataem>

    Directory of Open Access Journals (Sweden)

    Zhi-Long Liu

    2012-06-01

    Full Text Available The aim of this research was to determine the chemical composition and insecticidal activity of the essential oils derived from flowering aerial parts of <em>Artemisia giraldii em>Pamp. and <em>A. subdigitataem> Mattf. (Family: Asteraceae against the maize weevil (<em>Sitophilus zeamaisem> Motsch.. Essential oils of aerial parts of <em>A. giraldiiem> and <em>A. subdigitataem> were obtained from hydrodistillation and investigated by GC and GC-MS. A total of 48 and 33 components of the essential oils of <em>A. giraldiiem> and <em>A. subdigitataem> were identified, respectively. The principal compounds in <em>A. giraldiiem> essential oil were β-pinene (13.18%, <em>iso>-elemicin (10.08%, germacrene D (5.68%, 4-terpineol (5.43% and (<em>Z>-β-ocimene (5.06%. 1,8-Cineole (12.26% and α-curcumene (10.77% were the two main components of the essential oil of <em>A. subdigitataem>, followed by β-pinene (7.38%, borneol (6.23% and eugenol (5.87%. The essential oils of <em>A. giraldiiem> and <em>A. subdigitataem> possessed fumigant toxicity against the maize weevils with LC50 values of 6.29 and 17.01 mg/L air, respectively. The two essential oils of <em>A. giraldiiem> and <em>A. subdigitataem> also exhibited contact toxicity against <em>S. zeamaisem> adults with LD50 values of 40.51 and 76.34 µg/adult, respectively. The results indicated that the two essential oils show potential in terms of fumigant and contact toxicity against grain storage insects.

  10. Purification, Characterization and Antioxidant Activities <em>in Vitroem>> em>and <em>in Vivoem> of the Polysaccharides from <em>Boletus edulisem> Bull

    Directory of Open Access Journals (Sweden)

    Yijun Fan

    2012-07-01

    Full Text Available A water-soluble polysaccharide (BEBP was extracted from <em>Boletus edulis em>Bull using hot water extraction followed by ethanol precipitation. The polysaccharide BEBP was further purified by chromatography on a DEAE-cellulose column, giving three major polysaccharide fractions termed BEBP-1, BEBP-2 and BEBP-3. In the next experiment, the average molecular weight (Mw, IR and monosaccharide compositional analysis of the three polysaccharide fractions were determined. The evaluation of antioxidant activities both <em>in vitroem> and <em>in vivo em>suggested that BEBP-3 had good potential antioxidant activity, and should be explored as a novel potential antioxidant.

  11. Methyl 2-Benzamido-2-(1<em>H>-benzimidazol-1-ylmethoxyacetate

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    Alami Anouar

    2012-09-01

    Full Text Available The heterocyclic carboxylic α-aminoester methyl 2-benzamido-2-(1<em>H>-benzimidazol-1-ylmethoxyacetate is obtained by <em>O>-alkylation of methyl α-azido glycinate <em>N>-benzoylated with 1<em>H>-benzimidazol-1-ylmethanol.

  12. Sulla presenza di <em>Sorex antinoriiem>, <em>Neomys anomalusem> (Insectivora, Soricidae e <em>Talpa caecaem> (Insectivora, Talpidae in Umbria

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    A.M. Paci

    2003-10-01

    Full Text Available Lo scopo del contributo è di fornire un aggiornamento sulla presenza del Toporagno del Vallese <em>Sorex antinoriiem>, del Toporagno acquatico di Miller <em>Neomys anomalusem> e della Talpa cieca <em>Talpa caecaem> in Umbria, dove le specie risultano accertate ormai da qualche anno. A tal fine sono stati rivisitati i reperti collezionati e la bibliografia conosciuta. Toporagno del Vallese: elevato di recente a livello di specie da Brünner et al. (2002, altrimenti considerato sottospecie del Toporagno comune (<em>S. araneus antinoriiem>. È conservato uno di tre crani incompleti (mancano mandibole ed incisivi superiori al momento prudenzialmente riferiti a <em>Sorex> cfr. <em>antinorii>, provenienti dall?Appennino umbro-marchigiano settentrionale (dintorni di Scalocchio - PG, 590 m. s.l.m. e determinati sulla base della pigmentazione rossa degli ipoconi del M1 e M2; Toporagno acquatico di Miller: tre crani (Breda in Paci e Romano op. cit. e un esemplare intero (Paci, ined. sono stati trovati a pochi chilometri di distanza gli uni dall?altro tra i comuni di Assisi e Valfabbrica, in ambienti mediocollinari limitrofi al Parco Regionale del M.te Subasio (Perugia. In provincia di Terni la specie viene segnalata da Isotti (op. cit. per i dintorni di Orvieto. Talpa cieca: sono noti una femmina e un maschio raccolti nel comune di Pietralunga (PG, rispettivamente in una conifereta a <em>Pinus nigraem> (m. 630 s.l.m. e nelle vicinanze di un bosco misto collinare a prevalenza di <em>Quercus cerrisem> (m. 640 s.l.m.. Recentemente un terzo individuo è stato rinvenuto nel comune di Sigillo (PG, all?interno del Parco Regionale di M.te Cucco, sul margine di una faggeta a 1100 m s.l.m. In entrambi i casi l?areale della specie è risultato parapatrico con quello di <em>Talpa europaeaem>.

  13. Glycosylation of Vanillin and 8-Nordihydrocapsaicin by Cultured <em>Eucalyptus perrinianaem> Cells

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    Naoji Kubota

    2012-05-01

    Full Text Available Glycosylation of vanilloids such as vanillin and 8-nordihydrocapsaicin by cultured plant cells of <em>Eucalyptus perrinianaem> was studied. Vanillin was converted into vanillin 4-<em>O>-b-D-glucopyranoside, vanillyl alcohol, and 4-<em>O>-b-D-glucopyranosylvanillyl alcohol by <em>E. perriniana em>cells. Incubation of cultured <em>E. perrinianaem> cells with 8-nor- dihydrocapsaicin gave 8-nordihydrocapsaicin 4-<em>O>-b-D-glucopyranoside and 8-nordihydro- capsaicin 4-<em>O>-b-D-gentiobioside.

  14. Study of the <em>in Vitroem> Antiplasmodial, Antileishmanial and Antitrypanosomal Activities of Medicinal Plants from Saudi Arabia

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    Nawal M. Al-Musayeib

    2012-09-01

    Full Text Available The present study investigated the <em>in vitroem> antiprotozoal activity of sixteen selected medicinal plants. Plant materials were extracted with methanol and screened <em>in vitroem> against erythrocytic schizonts of <em>Plasmodium falciparumem>, intracellular amastigotes of <em>Leishmania infantum em>and <em>Trypanosoma cruzi em>and free trypomastigotes of<em> T. bruceiem>. Cytotoxic activity was determined against MRC-5 cells to assess selectivity<em>. em>The criterion for activity was an IC50 < 10 µg/mL (4. Antiplasmodial activity was found in the<em> em>extracts of<em> em>>Prosopis julifloraem> and <em>Punica granatumem>. Antileishmanial activity<em> em>against <em>L. infantumem> was demonstrated in <em>Caralluma sinaicaem> and <em>Periploca aphylla.em> Amastigotes of<em> T. cruzi em>were affected by the methanol extract of<em> em>>Albizia lebbeckem>> em>pericarp, <em>Caralluma sinaicaem>,> Periploca aphylla em>and <em>Prosopius julifloraem>. Activity against<em> T. brucei em>was obtained in<em> em>>Prosopis julifloraem>. Cytotoxicity (MRC-5 IC50 < 10 µg/mL and hence non-specific activities were observed for<em> em>>Conocarpus lancifoliusem>.>

  15. Retratos em movimento.

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    Luiz Carlos Oliveira Junior

    Full Text Available resumo O artigo aborda aspectos da relação do cinema com a arte do retrato. Buscamos, em primeiro lugar, uma definição estética do que seria um retrato cinematográfico, sempre em tensão com os critérios formais e padrões estilísticos que historicamente constituíram o retrato pictórico. Em seguida, relacionamos essa questão com a importância que se deu à representação do close-up de rosto nas primeiras décadas do cinema, quando foi atribuído aos filmes um papel inédito no estudo da fisionomia e da expressão facial. Por fim, apresentamos exemplos de autorretratos na pintura e no cinema para expor a forma como a autorrepresentação põe em crise as noções de subjetividade e identidade em que a definição clássica do retrato se apoiava.

  16. O Prêmio Nobel de Medicina e Fisiologia de 2012 quebrou o paradigma sobre a reversão do genoma e abre portas à Medicina do futuro.

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    José Garcia Ribeiro Abreu Júnior

    2013-01-01

    Full Text Available Este editorial apresenta a revisao cientifica sobre o premio Nobel de Fisiologia e Medicina de 2012 conferido aos pesquisadores Jonh Gurdon e Shynia Yamanaka. No editorial e discutido com se chegou a descoberta sobre a reprogramacao do genoma e seus impactos na medicina do futuro baseada em celulas tronco.

  17. Natural Products from Antarctic Colonial Ascidians of the Genera <em>Aplidium> and <em>Synoicum>: Variability and Defensive Role

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    Conxita Avila

    2012-08-01

    Full Text Available Ascidians have developed multiple defensive strategies mostly related to physical, nutritional or chemical properties of the tunic. One of such is chemical defense based on secondary metabolites. We analyzed a series of colonial Antarctic ascidians from deep-water collections belonging to the genera <em>Aplidium> and <em>Synoicum> to evaluate the incidence of organic deterrents and their variability. The ether fractions from 15 samples including specimens of the species <em>A.> <em>falklandicum>, <em>A.> <em>fuegiense>, <em>A.> <em>meridianum>, <em>A.> <em>millari> and <em>S.> <em>adareanum> were subjected to feeding assays towards two relevant sympatric predators: the starfish <em>Odontaster> <em>validus>, and the amphipod <em>Cheirimedon> <em>femoratus>. All samples revealed repellency. Nonetheless, some colonies concentrated defensive chemicals in internal body-regions rather than in the tunic. Four ascidian-derived meroterpenoids, rossinones B and the three derivatives 2,3-epoxy-rossinone B, 3-epi-rossinone B, 5,6-epoxy-rossinone B, and the indole alkaloids meridianins A–G, along with other minoritary meridianin compounds were isolated from several samples. Some purified metabolites were tested in feeding assays exhibiting potent unpalatabilities, thus revealing their role in predation avoidance. Ascidian extracts and purified compound-fractions were further assessed in antibacterial tests against a marine Antarctic bacterium. Only the meridianins showed inhibition activity, demonstrating a multifunctional defensive role. According to their occurrence in nature and within our colonial specimens, the possible origin of both types of metabolites is discussed.

  18. Nietzsche em voga

    OpenAIRE

    Borromeu, Carlos

    2015-01-01

    Resumo:Texto publicado em 1941, na revista de orientação católica A Ordem, no Rio de Janeiro. Seu autor considera que Nietzsche teria negado a moral tradicional, concebendo em seu lugar outra, porém imoral e brutal. Acusa o filósofo, por fim, de ser responsável pela Guerra ora e curso na Europa. Abstract:Text published in 1941 in the Catholic orientation magazine, A Ordem, in Rio de Janeiro. The author believes that Nietzsche would have denied traditional morality, conceiving another in it...

  19. Primeiras frases em Libras

    OpenAIRE

    Comissão Editorial

    2017-01-01

    "Primeiras Frases em Libras" é um CD-ROM com interface interativa que tem por objetivo a iniciação na Língua Brasileira de Sinais - Libras. A partir de temas do cotidiano, permite à criança relacionar a imagem a uma estrutura frasal da Libras de forma lúdica, contribuindo para aquisição de conceitos e aspectos culturais. Para a utilização desse material é importante que sejam identificadas as diferenças regionais existentes em alguns sinais e que sejam adaptadas para a Libras local, tornando-...

  20. Identification and Determination of <em>Aconitum> Alkaloids in <em>Aconitum> Herbs and <em>Xiaohuoluo Pillem> Using UPLC-ESI-MS

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    Li Yang

    2012-08-01

    Full Text Available A rapid, specific, and sensitive ultra-performance liquid chromatography-electrospray ionization-mass spectrometry (UPLC-ESI-MS method to examine the chemical differences between <em>Aconitum> herbs and processed products has been developed and validated. Combined with chemometrics analysis of principal component analysis (PCA and orthogonal projection to latent structural discriminate analysis, diester-diterpenoid and monoester-type alkaloids, especially the five alkaloids which contributed to the chemical distinction between <em>Aconitum> herbs and processed products, namely mesaconitine (MA, aconitine (AC, hypaconitine (HA, benzoylmesaconitine (BMA, and benzoylhypaconitine (BHA, were picked out. Further, the five alkaloids and benzoylaconitine (BAC have been simultaneously determined in the <em>Xiaohuoluo pillem>. Chromatographic separations were achieved on a C18 column and peaks were detected by mass spectrometry in positive ion mode and selected ion recording (SIR mode. In quantitative analysis, the six alkaloids showed good regression, (<em>r> > 0.9984, within the test ranges. The lower limit quantifications (LLOQs for MA, AC, HA, BMA, BAC, and BHA were 1.41, 1.20, 1.92, 4.28, 1.99 and 2.02 ng·mL−1, respectively. Recoveries ranged from 99.7% to 101.7%. The validated method was applied successfully in the analysis of the six alkaloids from different samples, in which significant variations were revealed. Results indicated that the developed assay can be used as an appropriate quality control assay for <em>Xiaohuoluo pillem> and other herbal preparations containing <em>Aconitum> roots.

  1. Fabrication and study of stability of Ca{sub 2}AlWO{sub 5,5} ceramic in crude petroleum for applications in petroleum industry; Fabricacao e estudo da estabilidade em petroleo cru da ceramica Ca{sub 2}AlWO{sub 5,5} para aplicacao em industria petrolifera

    Energy Technology Data Exchange (ETDEWEB)

    Yadava, Y.P.; Silva, N.D.G.; Sousa, A.G. de; Sanguinetti Ferreira, R.A., E-mail: dea.a@hotmail.co [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Engenharia Mecanica

    2010-07-01

    Perovskite-type ceramic oxides or their derivatives are used for applications in high technology because of their enormous range of physic-chemical properties with little change in structural characteristics. In this paper we report manufacture ceramic components of a new ceramic Ca{sub 2}AlWO{sub 5,5} by thermo-mechanical process. Stoichiometric amounts of chemical constituents with high degree of purity, were homogenized using a ball mill and high purity alumina balls, compacted by uniaxial pressing and annealed at 1200 deg C for 48 hours. The structural characterization studied by x-ray diffraction that this material has a typical complex ordered cubic perovskite structure. For the study the stability of these ceramics in crude petroleum circular discs of 20 mm diameter and 2 mm thickness were produced and sintering. These discs were submerged in crude petroleum for 15, 30 and 45 days and were examined at each stage by X-ray diffraction, optical microscopy and hardness testing and these results show that Ca{sub 2}AlWO{sub 5,5} are stable in crude petroleum environment. (author)

  2. Study of {sup 137}Cs e {sup 60}Co sorption in sediments from Saco de Piraquara de Fora, Angra dos Reis and its application for environmental monitoring; Estudo da sorcao de {sup 137}Cs e {sup 60}Co em sedimentos do Saco de Piraquara de Fora em Angra dos Reis e sua aplicacao para o monitoramento ambiental

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Ingryd Marques

    2016-08-01

    Both the suspended solid particles and the bed sediments sorb radionuclides, released in water systems. Sorption is usually represented mathematically by the distribution coefficient that is based in equilibrium between phases. Here the adsorption/desorption kinetics of {sup 60}Co and {sup 137}Cs in sea water were simulated by batch equilibrium experiments with sediments in two points (PT - 01, PT - 02) from Saco de Piraquara de Fora inlet (SPF). For both radionuclides, partition coefficient values (Kd) for the sampling point PT - 02 (509 and 385 L/kg for {sup 60}Co and {sup 137}Cs, respectively) were higher than the values determined for PT - 01 one (426 and 182 L/kg for {sup 137}Cs and {sup 60}Co, respectively). The higher values of Kd of PT-02 reflects the higher CEC (71,4 cmolc.dm{sup 3}) and content of mud < 63 μm (87%) when compared to PT-01 (CEC of 39,5 cmol{sub c}.dm{sup 3}) and mud (55%). In comparison with the values reported in the literature, the found Kd values are low, which may be related to the predominance of kaolinite, which is a clay of low sorption capacity. The Kd values with an increase in temperature of 23 deg C to 27 deg C were similar ({sup 60}Co in PT-02 and {sup 137}Cs in both sediment) or 27 ° C values were higher ({sup 60}Co the PT-01). With increasing temperature to 31 °C Kd values for the two radionuclides showed a decrease. However, increasing temperature increases the desorption of the two radionuclides for both sediments The sorption process is spontaneous and favorable for both sediments and the model of sorption can be fitted by both Freundlich and Langmuir sorption isotherms. The maximum amount of {sup 60}Co that can be sorbed on sediments were 1,64 10{sup -5} moles/g (4,12 10{sup 10} Bq/g) and 2,79 10{sup -5} moles/g (7,03 10{sup 10} Bq/g) to PT-01 and PT-02, respectively, and of {sup 137}Cs 1,99 10{sup -6} moles/g (9,70 10{sup 8} Bq/g) and 6,60 10{sup -6} mol/g (2,87 10{sup 9} Bq/g ) to PT-01 and PT-02. Two areas in SPF can potentially accumulate {sup 137}Cs: sediments located near the effluent discharge and the area located north of this site. An area in the interface of SPF and the bay of Ribeira would potentially the best accumulated of {sup 60}Co. (author)

  3. Synthesis of protons exchange polymeric membranes via co-poly-esters doped with sodium dodecyl sulfate for application in PEM fuel cells; Sintese de membranas polimericas condutoras de protons por imobilizacao de MDs em copoliesteres para aplicacao em PEM-FC

    Energy Technology Data Exchange (ETDEWEB)

    Fiuza, R.A.; Brioude, M.M.; Bresciani, D.; Jose, N.M.; Boaventura, J.S. [Universidade Federal da Bahia (IQ/UFBA), Salvador, BA (Brazil). Inst. de Quimica

    2008-07-01

    Polymers are largely studied for use in PEM-type fuel cell (Proton Exchange membrane, PEMFC). These fuel cells are based on polymer membranes as electrolyte, also called protons conductor. This work developed co-polyesters made electrical conductors by doping with sodium dodecyl sulfate. The copolymers were synthesized from the copolymerization of terephthalic and adipic acids with glycerol. The material was processed in a reactor and shaped by hot pressing, yielding homogeneous and flexible plates, with excellent surface finish. The co-polyesters were analyzed by SEM, FTIR, TG, DSC, and XRD. The thermal analysis showed that the composites were thermally stable up to about 250 deg C. The micrographics revealed the MDS homogeneously dispersed in the polymeric matrix. These copolymers showed electrical conductivity between 10-7 to 10-1 S/cm, suggesting strong potential use in PEM fuel cells. (author)

  4. Application of the mechanism of clean development - MDL to the projects of PCHs operating in isolated system in Brazil; A aplicacao dos mecanismos de desenvolvimento limpo - MDL - em projetos de implantacao de pequenas centrais hidreletricas - PCHs em sistemas isolados no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Nunes, Camila Fernandes

    2006-07-01

    The present work considered to analyze the potential of application of the Mechanism of Clean Development - MDL to the projects of PCHs operating in isolated system. For in such a way, the emissions of gases of effect had been entered greenhouse - GEEs proceeding from a thermoelectric plant operating with diverse types of fuels: oil diesel, combustible oil, natural gas and coal and the emissions of one hydropower plant - a PCH. For comparison effect two scenes of performance of a PCH had been considered standard of 15MW: the first one corresponding to an area flooded of 3km{sup 2} and according to an area of 13km{sup 2}. Had the absence of data of emissions of GEEs for PCHs, a correlation with data of available CO{sub 2} emission of the UHE Curua-Una was established (chosen for the availability of referring data the measurements C-CO{sub 2} emission). The values calculated for the method of chamber of diffusion, which had most of the carbon emissions proceeding from hydropower reservoirs had been used to be proceeding from the diffusion of CO{sub 2} in the surface. The gotten results had demonstrated that it is possible if to credit of the benefits of the MDL through the implantation of PCHs operating in isolated systems in substitution the thermal plants. (author)

  5. Application of the linear load normalization technique in specimens SE(T) for the evaluation of structural integrity in conducting ducts of gas and oil; Aplicacao da tecnica de normalizacao linear da carga em especimes SE(T) para a avaliacao de integridade estrutural em dutos condutores de gas e petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Piovatto, R.R.; Carvalho, A.L.M.; Bose Filho, W.W.; Spinelli, D.; Rugieri, C. [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil); Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica], e-mail: betaopiovatto@gmail.com

    2006-07-01

    This aim of this work is to evaluate the fracture toughness of pipe lines under high internal pressure, used in the petroliferous industry for transportation of gas and oil. These ducts are produced from high strength low alloy steels, classified as API X60. Therefore, to simulate the stress and strain fields ahead of crack, the SE(T) specimens has been point out as the best specimen geometry. The linear load normalization technique, LLN, has been showed as a promissory technique for obtaining the J-R resistance curves. The J values were obtained following the ASTM 1820 and 1152 standards, with the coefficients modified for this specimen geometry. Side groves were executed to avoid crack tunneling and to maintaining the crack on the plane perpendicular to the loading direction. The J-R curves obtained are compatible for high ductility steels. However, the observed J values seems to high, and the factors affecting this result are discussed in this work. (author)

  6. Alterações hematológicas em bovinos submetidos ao envenenamento crotálico

    Directory of Open Access Journals (Sweden)

    P. M. Ferreira

    2005-03-01

    Full Text Available RESUMO: O quadro clínico observado ao exame do animal acidentado pela cascavél sul americana (Crotalus durissus terrificus , portadora de veneno contendo quantidades significativas da toxina crotamina, é de difícil diferenciação clínica com outras doenças. Com o objetivo de se estabelecer alterações hematológicas que auxiliem o diagnóstico desta condição mórbida, cinco fêmeas bovinas mestiças, com idade variando entre dois e três anos, foram inoculadas com veneno crotálico do tipo crotamina positivo, utilizando a dose de 0,03 mg por quilo de pêso vivo, na região glútea, por via intramuscular. Colheu-se amostras de sangue para realizar os exames laboratoriais antes e a cada duas horas após a inoculação, até a morte dos animais. Verificou-se que: o número de hemácias, o volume corpuscular médio ( VCM , a hemoglobina corpuscular média ( HCM , os números de leucócitos totais, de linfócitos, de neutrófilos e de monócitos, tiveram aumentos significativos e que os números de leucócitos totais apresentaram comportamento atípico, caracterizado por leucocitoses com valores atingindo até 60.000 celulas/mm,3 a cada seis horas, alternadas por quedas para em torno de 13.000 células/mm3. Pelo exposto, concluiu-se que a observação destas alterações poderá auxiliar o estabelecimento do diagnóstico desta afecção nos bovinos. PALAVRAS CHAVE: Envenenamento crotálico; hemograma; bovinos. SUMMARY: The clinical findings observed at examination of an animal attacked by South American rattle snake (Crotalus durissus terrificus , that has poison containing significative crotamine toxin quantites are difficult to distinguish from other diseases. With the aim of establishing haematological parameters of diagnostic value for this condition diagnosis, five crossbred female cattle, from two to three years old, were inoculated with

  7. Espondiloptose em atleta

    Directory of Open Access Journals (Sweden)

    Ana Paula Luppino Assad

    2014-06-01

    Full Text Available Os atletas adolescentes estão sob maior risco de lombalgia e lesões estruturais da coluna. A espondilólise é responsável pela maioria das lombalgias em jovens esportistas e raramente ocorre em adultos. Relatamos o caso de uma paciente de 13 anos, atleta de judô, que chegou a nosso serviço com quadro de cinco meses de lombalgia progressiva durante os treinos, sendo inicialmente atribuída a causas mecânicas, sem que houvesse uma investigação mais detalhada por métodos de imagem. Na admissão já apresentava deformidade lombar, postura antálgica e manobra de hiperextensão lombar em unipodálico positiva bilateralmente. Realizou-se investigação, que evidenciou espondiloptose, sendo, então, submetida a tratamento cirúrgico. Com base neste relato de caso, discutimos a abordagem diagnóstica de lombalgia em atletas jovens, uma vez que a queixa de lombalgia crônica pode ser marcador de uma lesão estrutural, a qual pode ser definitiva e trazer perda funcional irreversível.

  8. Accountability em listas abertas

    Directory of Open Access Journals (Sweden)

    Luis Felipe Miguel

    2010-10-01

    Full Text Available O artigo discute criticamente a percepção, corrente em estudos sobre o sistema eleitoral brasileiro, de que a representação proporcional com listas abertas é um obstáculo à efetivação da accountability. Tal percepção está, em grande medida, baseada em visões equivocadas sobre a natureza do vínculo eleitoral no Brasil e o sentido da accountability, vista como uma relação entre o eleitor e seu candidato e não entre os constituintes e os representantes. O foco nas deficiências do sistema eleitoral, por outro lado, leva a ofuscar outros aspectos mais importantes para o aprimoramento da representação, relacionados à democratização da informação e ao fortalecimento da sociedade civil. Mesmo os problemas identificados nas listas abertas são melhor enfrentados com a ampliação do debate público e o fortalecimento da sociedade civil, que permitiria aos eleitores aproveitar de forma mais consistente as oportunidade de escolha que lhe são oferecidas, mais amplas do que em outros sistemas eleitorais.

  9. Fumigant Antifungal Activity of Myrtaceae Essential Oils and Constituents from <em>Leptospermum petersoniiem> against Three <em>Aspergillus> Species

    Directory of Open Access Journals (Sweden)

    Il-Kwon Park

    2012-09-01

    Full Text Available Commercial plant essential oils obtained from 11 Myrtaceae plant species were tested for their fumigant antifungal activity against <em>Aspergillus ochraceusem>, <em>A. flavusem>, and <em>A. nigerem>. Essential oils extracted from<em> em>Leptospermum> <em>petersonii> at air concentrations of 56 × 10−3 mg/mL and 28 × 10−3 mg/mL completely inhibited the growth of the three <em>Aspergillus> species. However, at an air concentration of 14 × 10−3 mg/mL, inhibition rates of <em>L. petersoniiem> essential oils were reduced to 20.2% and 18.8% in the case of <em>A. flavusem> and <em>A. nigerem>, respectively. The other Myrtaceae essential oils (56 × 10−3 mg/mL only weakly inhibited the fungi or had no detectable affect. Gas chromatography-mass spectrometry analysis identified 16 compounds in <em>L. petersoniiem>> em>essential> em>oil.> em>The antifungal activity of the identified compounds was tested individually by using standard or synthesized compounds. Of these, neral and geranial inhibited growth by 100%, at an air concentration of 56 × 10−3 mg/mL, whereas the activity of citronellol was somewhat lover (80%. The other compounds exhibited only moderate or weak antifungal activity. The antifungal activities of blends of constituents identified in <em>L. petersoniiem> oil indicated that neral and geranial were the major contributors to the fumigant and antifungal activities.

  10. Iodo em alimentos consumidos em Portugal

    OpenAIRE

    Coelho, Inês; Delgado, Inês; Costa, Sofia; Castanheira, Isabel; Calhau, Maria Antónia

    2015-01-01

    O iodo é um elemento vestigial essencial na dieta humana e animal, com uma importância nutricional bem estabelecida. É indispensável para a síntese das hormonas da tiroide, tiroxina e triiodotirosina, cujo principal papel está relacionado com o crescimento e desenvolvimento dos órgãos, em particular do cérebro. A fonte natural de iodo são os alimentos. Contudo, de acordo com a OMS um terço da população mundial sofre de algum tipo de carência de iodo. A deficiência crônica de iodo pode levar a...

  11. Efecto de extractos vegetales de <em>Polygonum hydropiperoidesem>, <em>Solanum nigrumem> y <em>Calliandra pittieriem> sobre el gusano cogollero (<em>Spodoptera frugiperdaem>

    Directory of Open Access Journals (Sweden)

    Lizarazo H. Karol

    2008-12-01

    Full Text Available

    El gusano cogollero <em>Spodoptera frugiperdaem> es una de las plagas que más afectan los cultivos en la región de Sumapaz (Cundinamarca, Colombia. En la actualidad se controla principalmente aplicando productos de síntesis química, sin embargo la aplicación de extractos vegetales surge como una alternativa de menor impacto sobre el ambiente. Este control se emplea debido a que las plantas contienen metabolitos secundarios que pueden inhibir el desarrollo de los insectos. Por tal motivo, la presente investigación evaluó el efecto insecticida y antialimentario de extractos vegetales de barbasco <em>Polygonum hydropiperoidesem> (Polygonaceae, carbonero <em>Calliandra pittieriem> (Mimosaceae y hierba mora <em>Solanum nigrumem> (Solanaceae sobre larvas de <em>S. frugiperdaem> biotipo maíz. Se estableció una cría masiva del insecto en el laboratorio utilizando una dieta natural con hojas de maíz. Posteriormente se obtuvieron extractos vegetales utilizando solventes de alta polaridad (agua y etanol y media polaridad (diclorometano los cuales se aplicaron sobre las larvas de segundo instar. Los resultados más destacados se presentaron con extractos de <em>P. hydropiperoidesem>, obtenidos con diclorometano en sus diferentes dosis, con los cuales se alcanzó una mortalidad de 100% 12 días después de la aplicación y un efecto antialimentario representado por un consumo de follaje de maíz inferior al 4%, efectos similares a los del testigo comercial (Clorpiriphos.

  12. Studies on the efficiency during reactivation of a generation system based on natural gas reformer and a 5 k W fuel cell; Estudos de eficiencia durante reativacao de um sistema de geracao baseado em reformador de gas natural e celula a combustivel de 5 kW

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Francisco da Costa; Furtado, Jose Geraldo de Melo; Silva Junior, Fernando Rodrigues da; Serra, Eduardo Torres [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil)]. E-mail: fcl@cepel.br

    2008-07-01

    Fuel cell based power generation systems have been pointing as promising technology for stationary applications mainly to supply power to critical loads. Among several types of fuel cells the Polymer Electrolyte Membrane Fuel Cells (PEMFC) are the main type used around the world. Nowadays reformers are widely employed to produce hydrogen for fuel cells. The Fuel Cell Laboratory of CEPEL has a power plant based on a 5 kW PEMFC and a natural gas reformer. For a long time the PEMFC was inoperable due to reformer malfunctioning and during this time the full power availability of PEMFC was lost due to deactivation of its catalytic sites. In most cases this deactivation is reversible. So it was started a reactivation process aiming to recover the full operational condition of the PEMFC unit. During this process the gas flow relationship and efficiency of the reformer were studied. An analysis of the PEMFC reactivation was conducted where it was noted that the reactivation took place as expected. During the reactivation process the PEMFC and the whole system efficiency were analyzed. The results suggest that the PEMFC can reach efficiency compatible with conventional power generation systems thus allowing PEMFC technology to compete with these energy sources in point of efficiency. (author)

  13. Evaluation of biological effect of {sup 90}Sr beta radiation in human blood cells and dose-response curve elaboration; Avaliacao do efeito biologico da radiacao beta do {sup 90}Sr em celulas sanguineas humanas e elaboracao de curva dose-resposta

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Elaine Mendes de

    2000-07-01

    Among several environmental genotoxins, ionizing radiation has been received special attention because of its mutagenic, carcinogenic and teratogenic potential. In this context, the aim of this study was evaluate the effects of {sup 90}Sr beta radiation in human cells, in view of the scarcity of literature data. For that, blood cells of five healthy donors were irradiated in vitro with doses between 0.2 and 5.0 Gy in a {sup 90}Sr source (0.2 Gy/min) and were processed for chromosome aberration analysis and for comet assay. Cytogenetic results showed that the type of structural chromosome aberrations found more frequently were acentric fragments, double minutes and dicentrics. The values of {alpha} and {beta} coefficient of linear-quadratic model used to fit dose response curves showed that {sup 90}Sr beta radiation was more efficient in induction of lesions from only one ionizing track than two independent tracks in chromosome aberration formation. Apparently, {sup 90}Sr beta radiation neither influenced the modal number of chromosome in irradiated cells nor in cell cycle kinetic of analyzed dose interval. Concerning the comet assay, there was an increase in DNA migration in a dose dependent manner, evaluated by either image analysis system (tail moment) or visual classification (DNA damage), which dose-response relation was adequately fitted to non-linear regression model. Both adopted techniques were complement in evaluating the biological effect of {sup 90}Sr beta radiation in human cells. (author)

  14. Intracellular labeling and quantification process by magnetic resonance imaging using iron oxide magnetic nanoparticles in rat C6 glioma cell line; Marcacao intracelular e processo de quantificacao por imagem por ressonancia magnetica utilizando nanoparticulas magneticas de oxido de ferro em celulas da linhagem C6 de glioma de rato

    Energy Technology Data Exchange (ETDEWEB)

    Mamani, Javier Bustamante; Pavon, Lorena Favaro; Sibov, Tatiana Tais; Rossan, Fabiana; Silveira, Paulo Henrique; Cardenas, Walter Humberto; Gamarra, Lionel Fernel, E-mail: javierbm@einstein.br [Instituto do Cerebro - InCe, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil); Miyaki, Liza Aya Mabuchi [Faculdade de Enfermagem, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil); Amaro Junior, Edson [Departamento de Diagnostico por Imagem e Instituto do Cerebro - InCe, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil)

    2012-04-15

    Objective: To assess intracellular labeling and quantification by magnetic resonance imaging using iron oxide magnetic nanoparticles coated with biocompatible materials in rat C6 glioma cells in vitro. These methods will provide direction for future trials of tumor induction in vivo as well as possible magnetic hyperthermia applications. Methods: Aminosilane, dextran, polyvinyl alcohol, and starch-coated magnetic nanoparticles were used in the qualitative assessment of C6 cell labeling via light microscopy. The influence of the transfection agent poly-L-lysine on cellular uptake was examined. The quantification process was performed by relaxometry analysis in T{sub 1} and T{sub 2} weighted phantom images. Results: Light microscopy revealed that the aminosilane-coated magnetic nanoparticles alone or complexed with poly-L-lysine showed higher cellular uptake than did the uncoated magnetic particles. The relaxactivities of the aminosilane-coated magnetic nanoparticles with a hydrodynamic diameter of 50nm to a 3-T field were r{sub 1}=(6.1 +- 0.3) x10{sup -5} ms{sup -1}mL/{mu}g, r{sub 2}=(5.3 +- 0.1) x 10{sup -4} ms{sup -1}mL/{mu}g, with a ratio of r{sub 2} / r{sub 1}{approx_equal} 9. The iron uptake in the cells was calculated by analyzing the relaxation rates (R{sub 1}and R{sub 2}) using a mathematical relationship. Conclusions: C6 glioma cells have a high uptake efficiency for aminosilane-coated magnetic nanoparticles complexed with the transfection agent poly-L-lysine. The large ratio r{sub 2} / r{sub 1}{approx_equal} 9 indicates that these magnetic nanoparticles are ideal for quantification by magnetic resonance imaging with T{sub 2}-weighted imaging techniques. (author)

  15. Efeito do tratamento neonatal com 17-'beta'-estradiol sobre o penis de rato em diferentes idades : aspectos estruturais do orgão e expressão do receptor de androgeno pelas celulas musculares lisas e endoteliais in vitro

    OpenAIRE

    Lilian Caroline Vaz Cardoso

    2009-01-01

    Resumo: Os hormônios androgênicos (testosterona e diidrotestosterona) regulam a diferenciação e o crescimento das estruturas penianas via receptor de andrógenos (AR), tendo este função reguladora da transcrição de genes relacionados a aspectos do desenvolvimento de indivíduos do sexo masculino. A presença de receptores de estrógenos no pênis permite assumir que o 17-â-estradiol (E2) e moléculas similares tenham efeito direto sobre sua fisiologia. De forma geral, o estrógeno tem efeito anti-a...

  16. Reduction of greenhouse gases emissions listed in the Kyoto Protocol by the utilization of landfill gas using solid oxide fuel cells; Reducao das emissoes de gases de efeito estufa listados no protocolo de Quioto pelo aproveitamento do gas gerado em aterros sanitarios utilizando celulas a combustivel de oxido solido. Estudo de caso do aterro municipal de Santo Andre, SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Paris, Alexandre Gellert

    2007-07-01

    In the last few years, the Kyoto Protocol had been a subject very debated, at first, in a restricted niche, manly academics and professionals related to the area of climate changes. On 16th February 2005 the Kyoto Protocol entered into force and with this a lot of publicity all over the world, so today is common to hear about it at the mass communications media. The extension of the subject is broad, this work discuss the utilization of one the Kyoto's flexibility mechanisms, to contribute to financing the use of the landfill gas in the solid oxide fuel cells. Among the three mechanisms presented in the Kyoto Protocol, the clean development mechanism (CDM) in article 12, is the only one that can be implemented by non-Annex I countries, the case of Brazil. In other hand, the issue of solid waste in Brazil is critical. Even being illegal, most of the solid waste goes to uncontrolled areas in open air places 'lixoes', causing degradation of the environment and the communities around this areas, and also emission of green house gases (GHG), deregulating the global climate system. Decontaminate this areas and the construction of landfills to replace than, considering the landfill as a bioreactor, and the utilization of the biogas to generate power can improve nowadays picture that we are facing. The utilization of an innovative alternative technology as the solid oxide fuel cell (SOFC) instead the conventional technologies will be more efficient and environmentally better. Among other barriers the cost is pointed as the biggest. In this context, the SOFC is the most expensive fuel cell, so the utilization of CDM can contribute to finance the application of this technology. Scenarios were made of 250 kW, 500 kW, 1,000 kW, 5,000 kW and 10,000 kW of installed power using biogas from the Municipal Landfill of Santo Andre. The calculations of the emission factor were done ex ante and ex post according to ACM0002. Comparing the costs of the installed power studied and the calculation of the emission reduction, a potential income, the costs are superior, however, other incomes from the selling of energy and the disposal of solid waste most be taken into account in the process of decision of this type of projects. (author)

  17. Primeiras frases em Libras

    Directory of Open Access Journals (Sweden)

    Comissão Editorial

    2017-02-01

    Full Text Available "Primeiras Frases em Libras" é um CD-ROM com interface interativa que tem por objetivo a iniciação na Língua Brasileira de Sinais - Libras. A partir de temas do cotidiano, permite à criança relacionar a imagem a uma estrutura frasal da Libras de forma lúdica, contribuindo para aquisição de conceitos e aspectos culturais. Para a utilização desse material é importante que sejam identificadas as diferenças regionais existentes em alguns sinais e que sejam adaptadas para a Libras local, tornando-se mais um exercício enriquecedor para aquisição e prática da Língua de Sinais. Maiores informações sobre o material no site da Editora Arara Azul: www.editora-arara-azul.com. br

  18. Quedas em idosos

    OpenAIRE

    Meneses, Joana Gonçalves de

    2016-01-01

    Trabalho final do mestrado em medicina do desporto com vista à atribuição do Grau de Mestre (área científica de geriatria), apresentado à Faculdade de Medicina da Universidade de Coimbra As quedas na população idosa constituem um grande problema de saúde pública, tendo em conta a sua dimensão física, psicológica, económica e social. Subjacente à ocorrência destes acontecimentos existe uma série de fatores de risco, como a idade, falta de equilíbrio, sedentarismo, doenças crónicas, a polime...

  19. Hipervitaminose D em animais

    Directory of Open Access Journals (Sweden)

    Paulo V. Peixoto

    2012-07-01

    Full Text Available Por meio de revisão da literatura, são apresentados dados referentes ao metabolismo da vitamina D, bem como aos principais aspectos toxicológicos, clínicos, bioquímicos, macroscópicos, microscópicos, ultraestruturais, imuno-histoquímicos e radiográficos de animais intoxicados natural e experimentalmente por essa vitamina, em diferentes espécies. Este estudo objetiva demonstrar a existência de muitas lacunas no conhecimento sobre mineralização fisiológica e patológica, em especial na mediação hormonal do fenômeno, bem como alertar para os riscos de ocorrência dessa intoxicação.

  20. CORANTES ARTIFICIAIS EM ALIMENTOS

    Directory of Open Access Journals (Sweden)

    Marcelo Alexandre PRADO

    2009-07-01

    Full Text Available

    O emprego de aditivos químicos é, sem dúvida, um dos mais polêmicos avanços alcançados pela indústria de alimentos. Os corantes artificiais pertencem a uma dessas classes de aditivos alimentares e têm sido objeto de muitas críticas, já que seu uso em muitos alimentos justifica-se apenas por questões de hábitos alimentares. Ainda existem diferentes opiniões quanto à inocuidade dos diversos corantes artificiais. Visando, principalmente, o controle no uso dos corantes sintéticos, mas tendo em vista que produtos coloridos artificialmente são exportados e importados, a análise desses aditivos requer métodos eficientes e rápidos para a detecção, identificação e quantificação. A cromatografia em papel e em camada delgada, apesar de serem técnicas relativamente rápidas, apresentam dados com baixa exatidão e precisão. Já na cromatografia líquida de alta eficiência (CLAE as maiores dificuldades encontram-se nas etapas de extração, mas principalmente no alto custo do equipamento. A eletroforese capilar apresenta os mesmos problemas da CLAE, aliados ao fato de se tratar de uma técnica relativamente recente para a análise desse tipo de substância e, portanto, existem poucos estudos a cerca da determinação e quantificação. PALAVRAS-CHAVE: Corantes artificiais; análise; legislação; CLAE; EC

  1. Opioid system manipulation during testicular development: results on sperm production and sertoli cells population = Manipulação do sistema opioidérgico durante o desenvolvimento testicular: consequência sobre a produção espermática e a população de células de sertoli

    Directory of Open Access Journals (Sweden)

    Fernanda Mafra Cajú

    2011-04-01

    Full Text Available The Sertoli cell has fundamental importance to the development andmaintenance of spermatogenesis, as well as it has a directly proportional numerical relationship to sperm production. The proliferative period of this cell in rats occurs between 13 days pre-natal and 21 days pos-natal, when is established the final population in adult animals. The Leydig cell can modulate the Sertoli cell proliferation during fetal and neonatal periodƒn throughƒnƒnƒÒ-endorphin. The manipulation of opioidergic system can promote changes in parameters related to development of nervous, endocrine andreproductive systems. By the way, the main purpose of this present work was to compare the effects of the blockade of opioid receptor blocking in Sertoli cells using naltrexone (50 mg kg-1 during fetal and neonatal period in Wistar rats. According to the results, themanipulation of opioidergic system during pre-natal period reduced the total length of seminiferous tubule and Sertoli cell population in adult rats, but sperm production was normal because this cell has had a compensatory response for spermatozoids support capacity.As celulas de Sertoli tem fundamental importancia para o desenvolvimento e manutencao da espermatogenese, bem como possuem uma relacao numerica diretamente proporcional com a producao espermatica. O periodo proliferativo destas celulas em ratos ocorre entre 13 dias pre-natal e 21 dias pos-natal, resultando na definicao da populacao decelulas de Sertoli nos animais adultos. As celulas de Leydig podem modular a proliferacao das celulas de Sertoli durante o periodo fetal e neonatal por meio da ƒÒ-endorfina. A manipulacao do sistema opioidergico durante esta fase pode promover alteracoes em parametros relacionados com o desenvolvimento dos sistemas nervoso, endocrino ereprodutivo. Em virtude disto, o objetivo do presente trabalho foi comparar os efeitos do bloqueio de receptores opioides nas celulas de Sertoli, utilizando o naltrexone (50 mg kg

  2. O estresse em escolares

    Directory of Open Access Journals (Sweden)

    Marilda E. Novaes Lipp

    Full Text Available A presença de sintomas de estresse foi pesquisada em uma amostra de 255 escolares de 7 a 14 anos de idade, oriundos de três tipos diferentes de escolas (municipal, particular e particular confessional filantrópica. Os dados foram analisados em termos de diferenças entre as escolas, sexo e série do ensino fundamental em que as crianças se encontravam. Constatou-se que o tipo de escola tinha uma forte associação com o nível de estresse dos alunos e que o número de meninas com estresse era significativamente maior do que o dos meninos. Verificou-se também que o estresse diminui nas séries mais elevadas e estava mais presente na primeira série. Pode-se concluir que as escolas têm um papel relevante no estresse infantil e que é possível dentro de uma escola apresentar níveis baixos de estresse, dependendo das características da mesma.

  3. Rapid Development of Microsatellite Markers with 454 Pyrosequencing in a Vulnerable Fish<em>,> the Mottled Skate<em>, Raja em>pulchra>

    Directory of Open Access Journals (Sweden)

    Jung-Ha Kang

    2012-06-01

    Full Text Available The mottled skate, <em>Raja pulchraem>, is an economically valuable fish. However, due to a severe population decline, it is listed as a vulnerable species by the International Union for Conservation of Nature. To analyze its genetic structure and diversity, microsatellite markers were developed using 454 pyrosequencing. A total of 17,033 reads containing dinucleotide microsatellite repeat units (mean, 487 base pairs were identified from 453,549 reads. Among 32 loci containing more than nine repeat units, 20 primer sets (62% produced strong PCR products, of which 14 were polymorphic. In an analysis of 60 individuals from two <em>R. pulchra em>populations, the number of alleles per locus ranged from 1–10, and the mean allelic richness was 4.7. No linkage disequilibrium was found between any pair of loci, indicating that the markers were independent. The Hardy–Weinberg equilibrium test showed significant deviation in two of the 28 single-loci after sequential Bonferroni’s correction. Using 11 primer sets, cross-species amplification was demonstrated in nine related species from four families within two classes. Among the 11 loci amplified from three other <em>Rajidae> family species; three loci were polymorphic. A monomorphic locus was amplified in all three <em>Rajidae> family species and the <em>Dasyatidae> family. Two <em>Rajidae> polymorphic loci amplified monomorphic target DNAs in four species belonging to the Carcharhiniformes class, and another was polymorphic in two Carcharhiniformes species.

  4. Solidariedade em Redes

    Directory of Open Access Journals (Sweden)

    Angie Gomes Gomes Biondi

    2015-03-01

    Full Text Available O discurso da comum humanidade que vinculava sofredor e espectador na base de uma moralidade piedosa caducou frente às solicitações de uma sociedade tecnológica, multicultural e pluralista. Ao repertório do protesto e da denúncia, como instrumentos privilegiados da modernidade, prevalecem agora novos apelos à chamada “sensibilidade humanitária” (CHOULIARAKI, 2013 posta diretamente a cada sujeito social conectado. Deste modo, uma profusão de causas individuais tem se amontoado nas redes sociais (não raro, multiplicadas pelos meios de comunicação tradicionais todos os dias. Causas que se declaram legítimas e justificáveis em tempos de uma precária e insuficiente participação do Estado e que se orientam para uma ação direta às vítimas e oprimidos. Contudo, as interações afetivas que subjazem estes apelos solidários se coadunam à lógica de um capitalismo flexível que toma a própria vida em sua vertente criativa, como núcleo de produção econômica, ou seja, como forma de capitalização da própria vida cotidiana. Neste texto buscamos desenvolver uma etapa descritiva destas convocações solidárias como uma prática baseada na lógica conexionista que tem vigorado em nossa sociedade. Alguns casos são trazidos para pensar o lugar da vítima enquanto instância privilegiada de sua própria enunciação, os mecanismos de visibilidade que são articulados na comunicação modulada pelas redes e em que medida é possível pensar tais práticas como uma espécie de atualização das ações solidárias baseadas em uma “política do conexionismo”, conforme indicam os estudos de Boltanski e Chiapello (2013.

  5. Acarofauna em plantas ornamentais

    Directory of Open Access Journals (Sweden)

    Jania Claudia Camilo dos Santos

    2014-10-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE O cultivo e o comercio de plantas ornamentais vem cada vez mais ganhando espaço no Brasil, pela grande variedade das espécies existentes e exuberância de suas flores, que oferecem uma maior riqueza ao local. Dessa forma, o objetivo desse trabalho foi realizar o levantamento da população de ácaros associados às plantas ornamentais no município de Arapiraca-AL, em função dos diversos problemas acarretados por essa espécie. O levantamento foi realizado entre os meses de abril a março, através de amostragens mensais de folhas coletadas da parte basal, intermediária e apical de plantas existentes em praças e jardins. Foram coletados 55 ácaros pertencentes à ordem Prostigmata em 20 famílias de plantas. As plantas com as maiores riquezas de ácaros foram as Coleus blumei L. e Bxuxus sempervirens L., que apresentaram 65% dos valores amostrais. Analisando-se as coletas realizadas, pode-se observar que houve uma maior incidência populacional de ácaros na coleta do mês de maio, cuja percentagem foi de 36% de ácaros levantados, sendo que no levantamento dos dados amostrais de março a percentagem encontrada foi de 14%, nas amostragens dos meses de abril e junho, a percentagem amostrada dos dados foi de 22 e 28%, respectivamente. O estudo do levantamento de ácaros em plantas ornamentais permitiu observar a relação entre ácaros e a relação com a planta hospedeira, facilitando posteriormente um estudo mais aprofundado sobre plantas hospedeiras, e pode-se observar que em períodos chuvosos ocorre uma menor incidência populacional.

  6. A bone tissue engineering strategy based on starch scaffolds and bone marrow cells cultured in a flow perfusion bioreactor

    Science.gov (United States)

    Gomes, Maria Manuela Estima

    A Engenharia de Tecidos e uma area cientifica em continua expansao. Os desenvolvimentos conseguidos por esta area tem contribuido significativamente para diversos avancos no campo da Medicina Regenerativa. Esta ciencia interdisciplinar combina os conhecimentos de diversas outras areas, tao distintas como a Engenharia de Materiais e a Biologia, com o objectivo de desenvolver substitutos sinteticos para tecidos humanos. Para se atingir este objectivo utilizam-se, de uma forma generica, combinacoes especificas de celulas e de um material de suporte tridimensional com propriedades adequadas, gerando um material hibrido cujas caracteristicas podem ainda ser moduladas atraves do sistema de cultura usado. A presente tese e centrada no desenvolvimento de estrategias de engenharia de tecido osseo baseadas na cultura in vitro de celulas previamente "semeadas" num suporte tridimensional ("scaffold"). Esta estrategia permite que as celulas adiram ao suporte, proliferem e segreguem matriz extracelular especifica do tecido osseo, ate se obter um substituto artificial funcional com caracteristicas do tecido original, que pode finalmente ser transplantado para tratar o defeito em causa. Para que uma estrategia deste tipo seja bem sucedida, pelo menos tres componentes fundamentais devem ser cuidadosamente estudados: o material de suporte (scaffold), as celulas a usar e o sistema de cultura in vitro. Dai que os principais objectivos desta tese estejam relacionados com estes tres aspectos, nomeadamente: • Desenvolvimento de scaffolds biodegradaveis a partir de polimeros a base de amido de milho que induzam a adesao e proliferacao celular e que apresentem propriedades adequadas, tais como a porosidade e interconectividade entre poros, de forma a proporcionar um ambiente que favoreca o desenvolvimento in vitro de um material hibrido com caracteristicas similares ao osso humano. • Estudo da utilizacao de celulas da medula ossea como uma potencial fonte de celulas para engenharia do

  7. How <em>Varroa> Parasitism Affects the Immunological and Nutritional Status of the Honey Bee, <em>Apis melliferaem>

    Directory of Open Access Journals (Sweden)

    Katherine A. Aronstein

    2012-06-01

    Full Text Available We investigated the effect of the parasitic mite <em>Varroa destructorem> on the immunological and nutritional condition of honey bees, <em>Apis melliferaem>, from the perspective of the individual bee and the colony. Pupae, newly-emerged adults and foraging adults were sampled from honey bee colonies at one site in S. Texas, USA. <em>Varroa>‑infested bees displayed elevated titer of Deformed Wing Virus (DWV, suggestive of depressed capacity to limit viral replication. Expression of genes coding three anti-microbial peptides (<em>defensin1, abaecin, hymenoptaecinem> was either not significantly different between <em>Varroa>-infested and uninfested bees or was significantly elevated in <em>Varroa>-infested bees, varying with sampling date and bee developmental age. The effect of <em>Varroa> on nutritional indices of the bees was complex, with protein, triglyceride, glycogen and sugar levels strongly influenced by life-stage of the bee and individual colony. Protein content was depressed and free amino acid content elevated in <em>Varroa>-infested pupae, suggesting that protein synthesis, and consequently growth, may be limited in these insects. No simple relationship between the values of nutritional and immune-related indices was observed, and colony-scale effects were indicated by the reduced weight of pupae in colonies with high <em>Varroa> abundance, irrespective of whether the individual pupa bore <em>Varroa>.

  8. Deacidification of <em>Pistacia> <em>chinensis> Oil as a Promising Non-Edible Feedstock for Biodiesel Production in China

    Directory of Open Access Journals (Sweden)

    Yuan Meng

    2012-07-01

    Full Text Available <em>Pistacia> <em>chinensis> seed oil is proposed as a promising non-edible feedstock for biodiesel production. Different extraction methods were tested and compared to obtain crude oil from the seed of <em>Pistacia> <em>chinensis>, along with various deacidification measures of refined oil. The biodiesel was produced through catalysis of sodium hydroxide (NaOH and potassium hydroxide (KOH. The results showed that the acid value of <em>Pistacia> <em>chinensis> oil was successfully reduced to 0.23 mg KOH/g when it was extracted using ethanol. Consequently, the biodiesel product gave a high yield beyond 96.0%. The transesterification catalysed by KOH was also more complete. Fourier transform infrared (FTIR spectroscopy was used to monitor the transesterification reaction. Analyses by gas chromatography-mass spectrometry (GC-MS and gas chromatography with a flame ionisation detector (GC-FID certified that the <em>Pistacia> <em>chinensis> biodiesel mainly consisted of C18 fatty acid methyl esters (81.07% with a high percentage of methyl oleate. Furthermore, the measured fuel properties of the biodiesel met the required standards for fuel use. In conclusion, the <em>Pistacia> <em>chinensis> biodiesel is a qualified and feasible substitute for fossil diesel.

  9. On subspecific taxonomy of <em>Microtus saviiem> (Rodentia, Arvicolidae

    Directory of Open Access Journals (Sweden)

    Longino Contoli

    2003-10-01

    Full Text Available Riassunto Sulla tassonomia sottospecifica di <em>Microtus saviiem> (Rodentia, Arvicolidae Viene riveduta e riassunta la situazione tassonomica sottospecifica di <em>Microtus (Terricola saviiem>, anche tramite la descrizione di due nuovi taxa: <em>Microtus (Terricola savii tolfetanusem>, dei Monti della Tolfa e <em>Microtus (Terricola savii niethammericusem>, del Gargano.

  10. In vitro activity of 2-pyridinecarboxylic acid against trypanosomes of the subgenus Schizotrypanum isolated from the bat Phyllostomus hastatus = Atividade in vitro do ácido 2-piridinocarboxílico em tripanossoma do subgênero Schizotrypanum isolado do morcego Phyllostomus hastatus

    Directory of Open Access Journals (Sweden)

    Paulo Roberto Ceridóreo Corrêa

    2011-09-01

    Full Text Available The effect of 2-pyridinecarboxylic acid (picolinic acid on trypanosomes of the subgenus Schizotrypanum isolated from the bat Phyllostomus hastatus was determined in this study. Picolinic acid, at 50 ƒÊg mL-1, inhibited epimastigote growth by 99% after 12 days incubation. In addition, trypomastigote motility decreased by 50% after 6h and completely after 24h in the presence of 50 ƒÊg mL-1 picolinic acid. The 50% cytotoxic concentration on HEp-2 cell line was275 ƒÊg mL-1 after 4 days incubation. Altogether, these results indicate higher toxicity against trypanosomes. The inhibitory effect of picolinic acid on epimastigote growth can be partially reversed by nicotinic acid and L-tryptophan, suggesting a competitive inhibition. Furthermore, two anti-Trypanosoma (Schizotrypanum cruzi drugs were also evaluated with regard to bat trypanosome growth. Benznidazole, at 50 ƒÊg mL-1, inhibited epimastigote growth by 90% after 12 days incubation. Nifurtimox, at the same concentration, caused 96% growth inhibition after four days incubation. Corroborating a previous study, bat trypanosomes are a good model for screening new trypanocidal compounds. Moreover, they can be used to study many biological processes common to human pathogenic trypanosomatids.O efeito do acido 2- piridinocarboxilico (acido picolinico sobre um tripanossoma do subgenero Schizotrypanum isolado do morcego Phyllostomus hastatus foi determinado neste estudo. O acido picolinico, na concentracao de 50 ƒÊg mL-1, inibiu 99% do crescimento de epimastigotas apos 12 dias de incubacao. Alem disso, houve um decrescimo de 50 e 100% na mobilidade dos tripomastigotas apos 6 e 24h, respectivamente, em presenca de acido picolinico na concentracao de 50 ƒÊg mL-1. A concentracao citotoxica 50% para celulas HEp-2 foi de 275 ƒÊg mL-1 apos quatro dias de incubacao. Esses resultados indicam maior toxicidade contra os tripanossomas. O efeito inibitoriodo acido picolinico sobre o crescimento de

  11. Stem Cells and Cancer; Celulas madre y cancer

    Energy Technology Data Exchange (ETDEWEB)

    Segrelles, C.; Paraminio, J. M.; Lorz, C.

    2014-04-01

    Stem cell research has thrived over the last years due to their therapeutic and regenerative potential. Scientific breakthroughs in the field are immediately translated from the scientific journals to the mass media, which is not surprising as the characterisation of the molecular mechanisms that regulate the biology of stem cells is crucial for the treatment of degenerative and cardiovascular diseases, as well as cancer. In the Molecular Oncology Unit at Ciemat we work to unravel the role of cancer stem cells in tumour development, and to find new antitumor therapies. (Author)

  12. Antioxidant Profile of <em>Trifolium pratenseem> L.

    Directory of Open Access Journals (Sweden)

    Heidy Schwartsova

    2012-09-01

    Full Text Available In order to examine the antioxidant properties of five different extracts of <em>Trifolium pratenseem> L. (Leguminosae leaves, various assays which measure free radical scavenging ability were carried out: 1,1-diphenyl-2-picrylhydrazyl, hydroxyl, superoxide anion and nitric oxide radical scavenger capacity tests and lipid peroxidation assay. In all of the tests, only the H2O and (to some extent the EtOAc extracts showed a potent antioxidant effect compared with BHT and BHA, well-known synthetic antioxidants. In addition, <em>in vivo em>experiments were conducted with antioxidant systems (activities of GSHPx, GSHR, Px, CAT, XOD, GSH content and intensity of LPx in liver homogenate and blood of mice after their treatment with extracts of <em>T. pratenseem> leaves, or in combination with CCl4. Besides, in the extracts examined the total phenolic and flavonoid amounts were also determined, together with presence of the selected flavonoids: quercetin, luteolin, apigenin, naringenin and kaempferol, which were studied using a HPLC-DAD technique. HPLC-DAD analysis showed a noticeable content of natural products according to which the examined <em>Trifolium pratenseem> species could well be regarded as a promising new source of bioactive natural compounds, which can be used both as a food supplement and a remedy.

  13. Proximate Composition, Nutritional Attributes and Mineral Composition of <em>Peperomia> <em>pellucida> L. (Ketumpangan Air Grown in Malaysia

    Directory of Open Access Journals (Sweden)

    Maznah Ismail

    2012-09-01

    Full Text Available This study presents the proximate and mineral composition of <em>Peperomia> <em>pellucida> L., an underexploited weed plant in Malaysia. Proximate analysis was performed using standard AOAC methods and mineral contents were determined using atomic absorption spectrometry. The results indicated <em>Peperomia> <em>pellucida> to be rich in crude protein, carbohydrate and total ash contents. The high amount of total ash (31.22% suggests a high-value mineral composition comprising potassium, calcium and iron as the main elements. The present study inferred that <em>Peperomia> <em>pellucida> would serve as a good source of protein and energy as well as micronutrients in the form of a leafy vegetable for human consumption.

  14. Sade em Lacan

    OpenAIRE

    Riaviz, Eduardo

    2000-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Esta dissertação analisa o lugar do Marquês de Sade no ensino de Lacan. Começamos por reconstruir a recepção de Sade pela vanguarda francesa, particularmente no movimento surrealista e nos seus dissidentes. Em seguida, acompanhamos as modificações do lugar de Sade na obra de Lacan. Para isto nos orientamos nos seis paradigmas do gozo através dos quais J.-A. Miller ordena a doutrina lacaniana...

  15. Branqueamento em dentes endodonciados

    OpenAIRE

    Melício, Joianne Sandrine Lopes

    2014-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária Uma vez que a procura pela estética dentária vem aumentando significativamente, houve necessidade de procurar alternativas para a recuperação da coloração natural dos dentes quando esta é perdida por inúmeros fatores. O Branqueamento dentário, entre outras técnicas, tornou-se uma possibilidade para restaurar a perda da cor e tonalida...

  16. Quedas em idosos institucionalizados

    OpenAIRE

    Julia Emiko Fleming Uchida; Sheila de Melo Borges

    2014-01-01

    O objetivo do presente estudo foi verificar a frequência de quedas em idosos institucionalizados, bem como descrever os fatores de risco para quedas dessa população. As informações foram obtidas por meio de análise de prontuários, de entrevistas e pelos testes Timed Up and Go, Short Physical Performance Battery, Mini-exame do Estado Mental, Medida de Independência Funcional e Escala de Depressão Geriátrica-15. A frequência de quedas foi de 22,2% e verificou-se que os fatores de risco são freq...

  17. Flashes em Circuito

    Directory of Open Access Journals (Sweden)

    Ivete Lara Camargos Walty

    2002-12-01

    Full Text Available Reflexão sobre o papel da narrativa urbana no tratamento do tema da exclusão social, tendo como ponto de partida uma leitura do livro Passaporte, de Fernando Bonassi, que envolve a discussão do próprio gênero, a partir, sobretudo, da teoria do conto de Ricardo Piglia e de sua retomada das Seis propostas para o próximo milênio, de Ítalo Calvino, em artigo recente.

  18. Effects of <em>Citrus aurantiumem> (Bitter Orange Fruit Extracts and <em>p>-Synephrine on Metabolic Fluxes in the Rat Liver

    Directory of Open Access Journals (Sweden)

    Rosane Marina Peralta

    2012-05-01

    Full Text Available The fruit extracts of <em>Citrus aurantiumem> (bitter orange are traditionally used as weight-loss products and as appetite supressants. An important fruit component is <em>p>-synephrine, which is structurally similar to the adrenergic agents. Weight-loss and adrenergic actions are always related to metabolic changes and this work was designed to investigate a possible action of the <em>C. aurantiumem> extract on liver metabolism. The isolated perfused rat liver was used to measure catabolic and anabolic pathways, including oxygen uptake and perfusion pressure. The <em>C. aurantiumem> extract and <em>p>-synephrine increased glycogenolysis, glycolysis, oxygen uptake and perfusion pressure. These changes were partly sensitive to a- and b-adrenergic antagonists. <em>p>-Synephrine (200 mM produced an increase in glucose output that was only 15% smaller than the increment caused by the extract containing 196 mM <em>p>-synephrine. At low concentrations the <em>C. aurantiumem> extract tended to increase gluconeogenesis, but at high concentrations it was inhibitory, opposite to what happened with <em>p>-synephrine. The action of the <em>C. aurantiumem> extract on liver metabolism is similar to the well known actions of adrenergic agents and can be partly attributed to its content in <em>p>-synephrine. Many of these actions are catabolic and compatible with the weight-loss effects usually attributed to <em>C. aurantiumem>.

  19. Identification and Characterization of a <em>Bursaphelenchus xylophilusem> (Aphelenchida: Aphelenchoididae Thermotolerance-Related Gene: <em>Bx-HSP90em>

    Directory of Open Access Journals (Sweden)

    Danlei Li

    2012-07-01

    Full Text Available Temperatures directly influence the distribution and intensity of pine wilt disease caused by the pine wood nematode, <em>Bursaphelenchus xylophilusem>. To date, however, little is known about the causation and mechanism of this influence. The molecular chaperone HSP90 is a key component that contributes to survival in the abiotic stress response. In this study, we investigated the relationship between the survival of <em>B. xylophilusem> and the functionality of the HSP90 gene<em>.> <em>Bx-HSP90 em>was cloned from a suppression subtractive hybridization library. <em>In situem> mRNA hybridization showed that <em>Bx-HSP90em> was constitutively expressed in response to all of the temperatures tested, and RT-PCR indicated that all of the temperatures could induce <em>Bx-HSP90 em>transcription, with the highest transcript level detected at 30 °C. The suppression of the <em>Bx-HSP90em> transcript by RNA interference led to a 25% reduction in the number of nematodes at 30 °C after 44 h. Sharp declines in the survival of the RNAi-treated nematodes were observed after 8 days at 25 °C, 48 h at 30 °C and 24 h at 35 °C. Both heat shock and the knockdown of <em>Bx-HSP90 em>hindered the growth of the <em>B. xylophilusem> populations. The results indicate that <em>Bx-HSP90em> is essential for the survival of <em>B. xylophilusem>, confirming the thermoregulatory function of the gene, and delineate the timeframe and temperature range within which the gene function occurs.

  20. Chemical Composition, Antimicrobial and Antitumor Activities of the Essential Oils and Crude Extracts of<em> Euphorbiaem>> macrorrhizaem>

    Directory of Open Access Journals (Sweden)

    Haji Akber Aisa

    2012-05-01

    Full Text Available The present study aimed to examine the chemical composition and biological activity of essential oils extracted from <em>Euphorbia macrorrhizaem> collected from Northwest China. The major constituents of the essential oils of aerial parts and roots of <em>E. macrorrhizaem> are acorenone B (16.72% and 25.80%, (+-cycloisosativene (14.94% and 12.40%, 3a-hydroxy-5b-androstane (10.62% and 5.52%, copaene (7.37% and 6.29%, l-calamenene (4.13% and 4.65% and β-cedrene (8.40% and 7.98%, respectively. The minor components of them are thymene, γ-terpinene, thymecamphor, α-cedrene, zingiberene, trans-caryophyllene, β-chamigrene, curcumene, pentadecane, (−-α-muurolene, cuparene, γ-cadinene, (<em>Z>-3-heptadecene, 1,3,7,7-tetramethyl-2-oxabicyclo(4.4.0dec-5-en-4-one, hexahydrofarnesyl acetone, γ-elixene and palmitinic acid. The antimicrobial and antitumor activitiy of the <em>E. macrorrhizaem> essential oil against <em>Staphyloccocus aureusem>, <em>Escherichia coliem>, <em>Canidia Albicansem> and Caco-2 cells were evaluated. Among all the tested microorganisms and Caco-2 cells, the essential oils showed the strongest inhibitory effect on <em>Staphyloccocus aureus em>(MIC = 2.8 μg/mL and Caco-2 cell (IC50 = 11.86 μg/mL, whereas no effect on <em>Escherichia coliem> and <em>Candida em>albicans>. The data of this study suggested that the <em>E. macrorrhizaem> essential oils have great potential as a natural medicine for microbial infections and cancers.

  1. Further Insights on the Carotenoid Profile of the Echinoderm <em>Marthasteria>s glacialisem> L.

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    Natércia Teixeira

    2012-07-01

    Full Text Available In this study, the carotenoid profile of the echinoderm <em>Marthasterias glacialisem> L. was established using HPLC-DAD-APCI-MS/MS equipped with a C30 column. This approach rendered the identification of 20 compounds, eight of them reported for the first time in this marine organism. Differentiation of carotenoid isomers was also achieved.

  2. O insight em psiquiatria

    Directory of Open Access Journals (Sweden)

    Ana Margarida P. Cardoso

    2008-12-01

    Full Text Available O sinal de que algo está a acontecer contribui para que o paciente reconheça que alguma coisa de estranho se está a passar consigo. Este reconhecimento faz com que o sujeito possa desempenhar uma função activa e seja um elemento colaborante do seu processo de recuperação. Cada doença apresenta, contudo, diferentes sintomas, uma vez que cada doença psiquiátrica consiste em diferentes perturbações com diversos efeitos sobre o funcionamento mental. Desta maneira, o fenómeno do insight que é registado em cada doença é diferente e expressa-se sob diferentes formas, não somente devido às manifestações clínicas da doença mas também devido às características individuais do sujeito.

  3. Antibioticos profilaticos em neurocirurgia

    Directory of Open Access Journals (Sweden)

    Reynaldo A. Brandt

    1979-03-01

    Full Text Available O índice de infecções pós-operatórias em pacientes neuro-cirúrgicos que receberam antibióticos profiláticos neste período foi comparado com o de pacientes que não receberam antibióticos. Infecções ocorreram em proporções significativamente maiores nos pacientes que receberam antibióticos, particularmente naqueles com afecções intracranianas graves; estas infecções foram graves e fatais na maioria dos casos. A administração de antibióticos profiláticos nestes pacientes não só foi incapaz de prevenir o aparecimento de infecções pós-operatórias, como aparentemente favoreceu o seu desenvolvimento. Tal se deveu, provavelmente, à destruição do equilíbrio microbiano no organismo, favorecendo o desenvolvimento de germes patogênicos e resistentes aos antibióticos usuais

  4. Mulheres em movimento

    Directory of Open Access Journals (Sweden)

    Carneiro Sueli

    2003-01-01

    Full Text Available ESSE artigo busca demarcar a trajetória de luta das mulheres negras brasileiras no interior do movimento feminista nacional. Trata-se de colocar em questão a perspectiva feminista clássica fundada numa concepção universalista de mulher, que tem o seu paradigma na mulher branca ocidental, o que obscurece a percepção das múltiplas contradições intragênero e entre gêneros que a racialidade aporta. Dessas contradições, impõem-se para as mulheres negras a sua afirmação como um novo sujeito político, portador de uma nova agenda, esta resultante de uma identidade específica na qual se articulam as variáveis de gênero, raça e classe, colocando novos e mais complexos desafios para realização da eqüidade de gênero e raça em nossa sociedade.

  5. Identified EM Earthquake Precursors

    Science.gov (United States)

    Jones, Kenneth, II; Saxton, Patrick

    2014-05-01

    Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After a number of custom rock experiments, two hypotheses were formed which could answer the EM wave model. The first hypothesis concerned a sufficient and continuous electron movement either by surface or penetrative flow, and the second regarded a novel approach to radio transmission. Electron flow along fracture surfaces was determined to be inadequate in creating strong EM fields, because rock has a very high electrical resistance making it a high quality insulator. Penetrative flow could not be corroborated as well, because it was discovered that rock was absorbing and confining electrons to a very thin skin depth. Radio wave transmission and detection worked with every single test administered. This hypothesis was reviewed for propagating, long-wave generation with sufficient amplitude, and the capability of penetrating solid rock. Additionally, fracture spaces, either air or ion-filled, can facilitate this concept from great depths and allow for surficial detection. A few propagating precursor signals have been detected in the field occurring with associated phases using custom-built loop antennae. Field testing was conducted in Southern California from 2006-2011, and outside the NE Texas town of Timpson in February, 2013. The antennae have mobility and observations were noted for

  6. A democracia em Cuba

    Directory of Open Access Journals (Sweden)

    Julio César Guanche Zaldívar

    2011-01-01

    Full Text Available O triunfo revolucionário de 1959 consagrou em Cuba um novo conceito de democracia, com o intuito de garantir o acesso à vida política ativa de grandes setores da população, antes excluídos. Para isso, foi desenvolvida uma política de inclusão social com caráter universal. A prática política popular deixou as riquezas do país em mãos da população carente e gerou uma grande mobilidade social, fato que foi central para o aumento da participação popular. O contexto de agressão imperialista e o próprio desenvolvimento do processo produziram a consolidação de noções que limitaram a participação popular: o apogeu da burocracia, a compreensão da unidade como unanimidade e o seguimento, em certa medida, de correntes do marxismo soviético. Os desafios atuais para aprofundar a democracia em Cuba se apresentam em três planos: socializar o poder, promover a sociodiversidade e desenvolver a ideologia revolucionária.El triunfo revolucionario de 1959 consagró en Cuba un nuevo concepto de democracia, basado en garantizar acceso a la vida política activa a grandes sectores poblacionales, antes excluidos de ella. Para ello desarrolló una política de inclusión social con carácter universal. La práctica política popular puso las riquezas del país en manos de los desposeídos y generó gran movilidad social, hecho que resultó clave para el aumento de la participación popular. El contexto de agresión imperialista y el propio desarrollo del proceso produjo el afianzamiento de nociones que limitaron la participación popular: el auge de la burocracia, la comprensión de la unidad como unanimidad y el seguimiento, en parte, de corrientes del marxismo soviético. Los desafíos actuales se presentan en tres planos para profundizar la democracia en Cuba: socializar el poder, promover la sociodiversidad y desarrollar la ideología revolucionaria.The revolutionary triumph of 1959 established in Cuba a new concept of democracy, one that

  7. Four Novel Cellulose Synthase (CESA Genes from <em>Birch> (<em>Betula platyphylla em>Suk. Involved in Primary and Secondary Cell Wall Biosynthesis

    Directory of Open Access Journals (Sweden)

    Xuemei Liu

    2012-09-01

    Full Text Available Cellulose synthase (CESA, which is an essential catalyst for the generation of plant cell wall biomass, is mainly encoded by the <em>CesA> gene family that contains ten or more members. In this study; four full-length cDNAs encoding CESA were isolated from<em> Betula platyphyllaem> Suk., which is an important timber species, using RT-PCR combined with the RACE method and were named as <em>BplCesA3em>, <em>−4em>,> −7 em>and> −8em>. These deduced CESAs contained the same typical domains and regions as their <em>Arabidopsis> homologs. The cDNA lengths differed among these four genes, as did the locations of the various protein domains inferred from the deduced amino acid sequences, which shared amino acid sequence identities ranging from only 63.8% to 70.5%. Real-time RT-PCR showed that all four <em>BplCesAs> were expressed at different levels in diverse tissues. Results indicated that BplCESA8 might be involved in secondary cell wall biosynthesis and floral development. BplCESA3 appeared in a unique expression pattern and was possibly involved in primary cell wall biosynthesis and seed development; it might also be related to the homogalacturonan synthesis. BplCESA7 and BplCESA4 may be related to the formation of a cellulose synthase complex and participate mainly in secondary cell wall biosynthesis. The extremely low expression abundance of the four BplCESAs in mature pollen suggested very little involvement of them in mature pollen formation in <em>Betula>. The distinct expression pattern of the four <em>BplCesAs> suggested they might participate in developments of various tissues and that they are possibly controlled by distinct mechanisms in <em>Betula.>

  8. Osteoporose em caprinos

    Directory of Open Access Journals (Sweden)

    Fábio B. Rosa

    2013-04-01

    Full Text Available Foi realizado um estudo de casos de osteoporose em caprinos provenientes de uma propriedade na área de abrangência do LPV-UFSM, determinando a epidemiologia, o quadro clínico-patológico e discutindo os prováveis mecanismos patogenéticos. Cinco cabras, fêmeas, SRD, de seis meses a seis anos de idade foram afetadas. As cabras eram mantidas em campo nativo, sem suplementação com ração e sob superlotação. Os principais sinais clínicos foram emagrecimento, dificuldade de locomoção e permanência em decúbito por longos períodos. As principais alterações macroscópicas nos ossos examinados foram vistas nas superfícies de corte e caracterizavam-se por depleção do osso esponjoso (porosidade e redução acentuada da espessura do osso cortical. Havia também marcada atrofia serosa da gordura da medula óssea. Microscopicamente, nas regiões avaliadas (úmero proximal, rádio distal, fêmur distal, tíbia proximal e corpos das vértebras lombares foi observada redução moderada a acentuada do número e da espessura das trabéculas ósseas nas epífises e metáfises dos ossos longos e nos corpos vertebrais. Os achados clínico-patológicos indicaram que a osteoporose observada provavelmente foi causada pela desnutrição. As alterações ósseas (diminuição no número e na espessura das trabéculas do osso esponjoso sugerem que ambos os mecanismos, má formação óssea e reabsorção óssea aumentada, contribuíram para a ocorrência de osteoporose nos caprinos deste estudo.

  9. Quedas em idosos institucionalizados

    Directory of Open Access Journals (Sweden)

    Julia Emiko Fleming Uchida

    2014-03-01

    Full Text Available O objetivo do presente estudo foi verificar a frequência de quedas em idosos institucionalizados, bem como descrever os fatores de risco para quedas dessa população. As informações foram obtidas por meio de análise de prontuários, de entrevistas e pelos testes Timed Up and Go, Short Physical Performance Battery, Mini-exame do Estado Mental, Medida de Independência Funcional e Escala de Depressão Geriátrica-15. A frequência de quedas foi de 22,2% e verificou-se que os fatores de risco são frequentes nessa população, mostrando, assim, um risco importante para quedas futuras. Palavras-chave: Saúde do Idoso Institucionalizado; Acidentes por quedas; Fatores de risco.

  10. INDICADORES EM SANEAMENTO

    OpenAIRE

    Costa, Samuel Alves Barbi; Côrtes, Larissa Silveira; Coelho Netto, Taiana; Freitas Junior, Moacyr Moreira de

    2016-01-01

    Este artigo se propõe a analisar a evolução dos prestadores de serviços de saneamento do estado de MinasGerais entre os anos de 2005 e 2010 com base nos indicadores do Sistema Nacional de Informações em Saneamento(SNIS). Foram definidos parâmetros técnicos para a análise dos indicadores, classificados os resultados como satisfatórios(verdes) ou insatisfatórios (vermelhos). Esta categorização atende a concepção da Regulação Sunshine, trazendo à tona omonitoramento do progresso das ações no set...

  11. O humano em Womanity

    OpenAIRE

    Silva, Dâmaris de Oliveira Batista da

    2012-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Psicologia. A cultura da comunicação transforma e cria uma nova forma urbana, a comunicação urbana que produzida é para nos capturar e envolver com maior intensidade nessa sociedade do consumo. Há na comunicação publicitária uma proposta ideológica, pois cada signo é dirigido a alguém e o diálogo é constituído pelo poder. Nossa inserção no mundo define e é d...

  12. Em favor da talassografia

    Directory of Open Access Journals (Sweden)

    Jean-Louis Boudou

    2001-01-01

    Full Text Available A Talassografia (“descrição do mar” interessa-sepelos impactos físicos, biológicos, ecológicos... culturais da violenta antropização dos ambientes costeiros (oceânicos e continentais, caracterizados pelaexigüidade, vulnerabilidade, fragilidade e plasticidade. Como o Brasil é um “país marítimo”, os geó-grafos (os talassógrafos brasileiros são convidadosa intensificar suas pesquisas nas áreas costeiras e acriar novas estruturas para divulgá-las: Revista, Encontros, Associação, Pós-Graduação... tudo em prolda talassografia.

  13. Imagem digital em movimento

    OpenAIRE

    Travisani, Tatiana Giovannone [UNESP

    2008-01-01

    Este trabalho reúne análises sobre as imagens digitais com questões estruturais e poéticas do movimento, fazendo um levantamento histórico e artístico desde os primeiros experimentos em cronofotografia, até as manifestações atuais, do universo digital, que incorporam o movimento como temática. A imagem digital tratada não é de cunho sintético, mas sim que passou por algum processo de captura analógica, por meio de câmeras, e após isso, foi digitalizada. A partir daí, a pesquisa reflete as tra...

  14. INFLUÊNCIA ESTOICA NA CONCEPÇÃO DE <em>STATUS> E <em>DICTUM> COMO <em> QUASI RES EM> (ὡσανεì τινά EM ABERLARDO STOIC INFLUENCE IN ABELARD'S CONCEPTION OF <em>STATUS> AND <em>DICTUM> AS <em>QUASI RESem> (ὡσανεì τινά.

    Directory of Open Access Journals (Sweden)

    Guy Hamelin

    2011-09-01

    Full Text Available Na sua obra, Pedro Abelardo (1079-1142 destaca duas noções metafísicas que fundamentam sua teoria lógica: o <em style="mso-bidi-font-style: normal;">statusem> e o <em style="mso-bidi-font-style: normal;">dictum propositionisem>, ao causar, respectivamente, a imposição (<em style="mso-bidi-font-style: normal;">impositioem> dos termos universais e o valor de verdade das proposições. Trata-se de expressões que se referem a naturezas ontológicas peculiares, na medida em que não são consideradas coisas (<em style="mso-bidi-font-style: normal;">resem>, mesmo que constituem causas. Todavia, também não são nada. Abelardo as chama de ‘quase coisas’ (<em style="mso-bidi-font-style: normal;">quasi resem>. No presente artigo, explicamos, primeiro, essas duas noções essenciais da lógica abelardiana, antes de tentar, em seguida, encontrar a fonte dessa metafísica particular. Em oposição a comentadores importantes da lógica de Abelardo, que estimam que haja uma forte influência platônica sobre essa concepção específica, defendemos antes, com apoio de textos significativos e de acordo com o nominalismo abelardiano, que a maior ascendência sobre a metafísica do nosso autor é a do estoicismo, sobretudo, antigo.In his work, Peter Abelard (1079-1142 highlights two metaphysical notions, which sustain his logical theory: the <em>status> and the <em>dictum propositionisem>, causing respectively both the imposition (<em>impositio> of universal terms and the thuth-value of propositions. Both expressions refer to peculiar ontological natures, in so far as they are not considered things (<em>res>, even if they constitute causes. Nevertheless, neither are they ‘nothing’. Abelard calls them ‘quasi-things’ (<em>quasi resem>. In the present article, we expound first these two essential notions of Abelardian logic before then trying to find the source of this particular metaphysics. Contrary to some important

  15. Aggiornamento sulla distribuzione di <em>Talpa europaeaem> in Umbria

    Directory of Open Access Journals (Sweden)

    A.M. Paci

    2003-10-01

    Full Text Available L?Umbria, in ragione della sua posizione centrale nella Penisola, appare particolarmente interessante dal punto di vista biogeografico. Per quanto riguarda le talpe, ad esempio, sono presenti tutti i <em>taxa> italiani ma, essendo ancora scarse e frammentarie le informazioni sulla loro distribuzione regionale, viene intanto aggiornato lo status di <em>T. europaeaem> con la sintesi di alcuni dati inediti raccolti nella provincia di Perugia: <em>Zoccolanti>, Città di Castello, 300 m as pa, 13-IV-2001; <em>Monte Maggioreem>, Città di Castello, 605 m bc pa vu, 13-VI-2003; <em>San Secondoem>, Città di Castello, 260 m ci pb vf, 3-VI-1995 / 9-V-2001; <em>Lugnano>, Città di Castello, 260 m ci pb vf, 25-XI-1992; <em>Niccone>, Umbertide, 250 m ce pb vf 14-VI-2003; <em>Pietralunga>, 505 m as pa, 19-IV-2002; <em>Monte Cuccoem>, Sigillo, 1050 m bc bm vu, 5-V-2003 <em>Castiglione>, Gubbio, 840 m bc pa, 30-V-1999; <em>Schifanoia>, Valfabbrica, 350 m bc pa, 30-V-2000; <em>Oscano>, Perugia, 470 m bc pa, 2002; <em>Monte Melinoem>, Magione, 225 m ci ps vt, 19-I-2001; <em>Sant?Arcangelo>, Magione; 260 m zu ps vt, IV-2002; <em>Città della Pieveem>, 500 m as pa, 29-VI-2001 (bc bosco di caducifoglie, ce colture estensive, ci colture intensive, as area suburbana, zu zona umida, pa piano bioclimatico altocollinare, pb piano bioclimatico bassocollinare, bm piano bioclimatico bassomontano, ps piano bioclimatico collinare submediterraneo, vu variante umida, vf variante fredda, vt variante temperata. In letteratura la specie viene segnalata anche nel Comune di Assisi. In due località dell?Umbria nord-orientale ? Pietralunga e Monte Cucco - <em>T. europaeaem> è risultata in parapatria con <em>T. caecaem> mentre, da recentissima bibliografia, entrerebbe in contatto con <em>T. romanaem> nella fascia centrale della regione. Contemporaneamente si è creduto opportuno riportare notizie relative ad individui marchigiani

  16. Content and chemical composition of Hyptis marrubioides essential oil in function of seasons

    OpenAIRE

    Botrel, Priscila Pereira; Pinto, José Eduardo Brasil Pereira; Ferraz, Vany; Bertolucci, Suzan Kelly Vilela; Figueiredo, Felipe Campos

    2010-01-01

    Os oleos essenciais sao principios odoriferos armazenados em celulas especiais da planta. O oleo essencial no genero Hyptis e usado como anestesico, antiespasmodico, antiinflamatorio e pode induzir aborto em doses elevadas. O objetivo deste trabalho foi avaliar a influencia da sazonalidade no teor e composicao do oleo essencial de Hyptis marrubioides. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos (inverno, primavera, verao e outono) e seis repeticoes, totali...

  17. Cytogenetic and dosimetric effects of {sup 131}I in lymphocyte of patients with differentiated thyroid cancer with and without r-hTSH stimulation. Study in thyroid tumor cells (WRO) treated with {sup 131}I and {sup 60}Co in vitro; Efeitos citogenetico e dosimetrico do {sup 131}I em pacientes com cancer diferenciado da tireoide com e sem estimulacao com r-hTSH. Estudo em celulas tumorais tireoidianas (WRO) tratadas com {sup 131}I e {sup 60}Co in vitro

    Energy Technology Data Exchange (ETDEWEB)

    Valgode, Flavia Gomes Silva

    2015-11-01

    Differentiated thyroid cancer (DTC) represents about 90% of thyroid malignancies with increasing incidence in the recent decades. Treatment modalities include thyroidectomy, {sup 131}I therapy (with or without r-hTSH), radio and chemotherapy. Little is known about the effects of these treatments at the cellular level. This work was proposed in order to assess to what extent radioiodine therapy can cause damage in peripheral lymphocytes of patients with DTC, preceded or not by r-hTSH, taking into account acute, slow and dosimetric effects of {sup 131}I (in vivo study). An in vitro study was also carried out on thyroid tumor target cells (WRO) by cytotoxicity and genotoxicity analysis and radioiodine uptake. For this, blood samples from patients divided into two groups (group A, r-hTSH + {sup 131}I and group B,{sup 131}I only) were collected before, 24 hours, 1 week, 1 month and 1 year after {sup 131}I administration for aberration chromosome analysis (CA). A dose-response curve for {sup 131}I in vitro was developed for estimating the absorbed dose in patients, comparing the dicentric frequencies obtained in vitro with in vivo data by Monte Carlo program. Radioiodine therapy induced an increase in the number of CA in lymphocytes of patients peaking 24 hours after treatment, with gradual decline over time and with more chromosomal damage in group B than in group A, reaching baseline levels one year after radioiodine administration. The frequency of dicentric found inpatient lymphocytes, 24h after treatment, was equivalent to that induced in vitro (0.354 ± 0.153 MBq / mL for group A and 0.309 ± 0.154 MBq / mL for group B), which corresponds to absorbed doses of 0.8 ± 0.3 Gy and 0.7 ± 0.3 Gy for groups A and B, respectively, with no significant difference between the groups. WRO cells showed a cell cycle relatively slow: 96,3h with an unstable karyotype. The genotoxic test showed a relatively high radioresistance (0.07 to 3.70 MBq/mL), with no statistical significance, with or without r-hTSH. However, the cytotoxic assay, showed a tendency to decrease at higher concentrations of 1.85 (p <0.05) and 3.70 MBq/ml (p <0.01) only in the presence of r-hTSH, coincident with the highest level of uptake. WRO cells were also relatively radioresistant to external irradiation of {sup 60}Co in the range of 0.2-8.3 Gy, with a gradual decrease in function of time for higher doses (10,20 and 40Gy).The data obtained showed little cytogenetic damage in patients upon therapeutic exposure, suggesting a safe and effective treatment for both groups of patients. Patients in group A, however, had a better quality of life by using r-hTSH. In vitro studies with internal ({sup 131}I) and external ({sup 60}Co) irradiation, with or without r-hTSH, point to the need for an alternative therapeutic strategy to overcome the loss of ability of thyroid cells (WRO) to concentrate radioiodine, which is responsible for the failure of radioiodine therapy in patients with DTC. (author)

  18. Preferencia alimenticia del ácaro depredador <em>Balaustium> sp. en condiciones controladas

    Directory of Open Access Journals (Sweden)

    Muñoz Karen

    2009-04-01

    Full Text Available

    Se evaluó la preferencia de presas de <em>Balaustium> sp., enemigo natural de diferentes artrópodos plaga, y el cual es nativo de la Sabana de Bogotá. En unidades experimentales construidas con foliolos de plantas de rosa se colocaron independientemente individuos de <em>Balaustium> sp. y se registró el número de presas consumidas. De esta manera se determinó la preferencia de los tres estados móviles del ácaro depredador <em>Balaustium> sp. por diferentes edades de tres presas. Las especies y edades de las presas estudiadas fueron: huevos, ninfas y adultos de <em>Trialeurodes vaporariorumem>, huevos, ninfas y adultos de <em>Tetranychus urticaeem>, y larvas de primer y segundo instar y adultos de <em>Frankliniella occidentalisem>. Los estados menos desarrollados fueron preferidos, aunque se observó que los adultos del depredador tienen gran habilidad para consumir adultos de <em>T. vaporariorumem>. La presa preferida por las larvas de <em>Balaustium> sp. fue los huevos de <em>T. urticaeem> con una proporción de consumo de 0,54 de los huevos que se ofrecieron de esta presa; las deutoninfas del depredador eligieron huevos de <em>T. vaporariorumem> (0,537 o de <em>T. urticaeem> (0,497 y los adultos de <em>Balaustium> sp. prefrieron los huevos de <em>T. vaporariorumem> (0,588.

  19. Busca de estruturas em grandes escalas em altos redshifts

    Science.gov (United States)

    Boris, N. V.; Sodré, L., Jr.; Cypriano, E.

    2003-08-01

    A busca por estruturas em grandes escalas (aglomerados de galáxias, por exemplo) é um ativo tópico de pesquisas hoje em dia, pois a detecção de um único aglomerado em altos redshifts pode por vínculos fortes sobre os modelos cosmológicos. Neste projeto estamos fazendo uma busca de estruturas distantes em campos contendo pares de quasares próximos entre si em z Â3 0.9. Os pares de quasares foram extraídos do catálogo de Véron-Cetty & Véron (2001) e estão sendo observados com os telescópios: 2,2m da University of Hawaii (UH), 2,5m do Observatório de Las Campanas e com o GEMINI. Apresentamos aqui a análise preliminar de um par de quasares observado nos filtros i'(7800 Å) e z'(9500 Å) com o GEMINI. A cor (i'-z') mostrou-se útil para detectar objetos "early-type" em redshifts menores que 1.1. No estudo do par 131046+0006/J131055+0008, com redshift ~ 0.9, o uso deste método possibilitou a detecção de sete objetos candidatos a galáxias "early-type". Num mapa da distribuição projetada dos objetos para 22 escala. Um outro argumento em favor dessa hipótese é que eles obedecem uma relação do tipo Kormendy (raio equivalente X brilho superficial dentro desse raio), como a apresentada pelas galáxias elípticas em z = 0.

  20. Análise e diagnóstico de carcinoma basocelular a partir de imagem infravermelha

    OpenAIRE

    Flores-Sahagun, José Hector

    2010-01-01

    Resumo: Com o desenvolvimento de cameras de infravermelho mais modernas, a imagem infravermelha tem sido muito utilizada em medicina nos ultimos anos por ser uma tecnica nao-invasiva, de baixo custo e de ampla aplicacao. No entanto, parametros de calibracao da camera, a temperatura ambiente e o metabolismo do individuo sao fatores que afetam os resultados da termometria e por esta razao e dificil determinar com precisao a diferenca entre dados de um individuo sadio ou enfermo. Neste trabalho ...

  1. Synthesis of 1,2,3-Triazole Derivatives and <em>in Vitroem> Antifungal Evaluation on <em>Candida> Strains

    Directory of Open Access Journals (Sweden)

    Almir G. Wanderley

    2012-05-01

    Full Text Available 1,2,3-Triazoles have been extensively studied as compounds possessing important biological activities. In this work, we describe the synthesis of ten 2-(1-aryl-1<em>H>-1,2,3-triazol-4-ylpropan-2-ols via copper catalyzed azide alkyne cycloaddition (CuAAc or <em>click chemistryem>. Next the<em> in vitroem> antifungal activity of these ten compounds was evaluated using the microdilution broth method against 42 isolates of four different <em>Candida> species. Among all tested compounds, the halogen substituted triazole 2-[1-(4-chlorophenyl-1<em>H>-(1,2,3triazol-4-yl]propan-2-ol, revealed the best antifungal profile, showing that further modifications could be done in the structure to obtain a better drug candidate in the future.

  2. Extraction of Dihydroquercetin<em> em>from <em>Larix gmeliniem>i> em>with Ultrasound-Assisted and Microwave-Assisted Alternant Digestion

    Directory of Open Access Journals (Sweden)

    Yuangang Zu

    2012-07-01

    Full Text Available An ultrasound and microwave assisted alternant extraction method (UMAE was applied for extracting dihydroquercetin (DHQ from <em>Larix gmeliniem>i> wood. This investigation was conducted using 60% ethanol as solvent, 1:12 solid to liquid ratio, and 3 h soaking time. The optimum treatment time was ultrasound 40 min, microwave 20 min, respectively, and the extraction was performed once. Under the optimized conditions, satisfactory extraction yield of the target analyte was obtained. Relative to ultrasound-assisted or microwave-assisted method, the proposed approach provides higher extraction yield. The effect of DHQ of different concentrations and synthetic antioxidants on oxidative stability in soy bean oil stored for 20 days at different temperatures (25 °C and 60 °C was compared. DHQ was more effective in restraining soy bean oil oxidation, and a dose-response relationship was observed. The antioxidant activity of DHQ was a little stronger than that of BHA and BHT. Soy bean oil supplemented with 0.08 mg/g DHQ exhibited favorable antioxidant effects and is preferable for effectively avoiding oxidation. The <em>L. gmeliniiem> wood samples before and after extraction were characterized by scanning electron microscopy. The results showed that the UMAE method is a simple and efficient technique for sample preparation.

  3. Molluscicidal Activity of Methomyl and Cardenolide Extracts from <em>Calotropis proceraem> and <em>Adenium> <em>arabicum> Against the Land Snail <em>Monacha cantianaem>

    Directory of Open Access Journals (Sweden)

    Alaa Bayoumi

    2012-05-01

    Full Text Available In this work, we have evaluated the molluscicidal activity of two cardenolide extracts from <em>Adenium arabicumem> Balf f. [the benzene (B and methanol (M extracts], one cardenolide extract from <em>Calotropis proceraem> (Aiton W.T. Aiton (extract C, and methomyl against the harmful land snail <em>Monacha cantianaem> (Montagu. The contact LD50 values for the above mentioned plant extracts were 12.62, 34.63, and 34.35 mg·kg−1 of body weight, respectively, while the LD50 for methomyl was 116.62 mg·kg−1, that is, the plant extracts were 9.24, 3.37, and 3.4 times more toxic than methomyl. In addition, a simple colorimetric method, based on Kedde reagent, was modified to determine cardenolide concentrations in plant extracts. Thin layer chromatography analysis (TLC showed several cardiac glycosidal compounds in each plant extract. The results proved that cardiac glycosides are promising candidate compounds that could be used to control land snails, or exploited to develop new, effective, and environmentally friendly molluscicides.

  4. Conjuntivite em animais de companhia

    OpenAIRE

    Gonçalves, Mariana Inês Pereira Coelho

    2015-01-01

    Dissertação de Mestrado Integrado em Medicina Veterinária, Ciências Veterinárias A conjuntivite é a doença ocular mais frequentemente diagnosticada em Medicina Veterinária, tanto em cães como em gatos. O facto de a conjuntiva ser uma membrana mucosa tão exposta a agentes externos faz com que esteja bastante suscetível a sofrer lesões, com consequente inflamação. Nesta dissertação abordam-se os diferentes tipos de conjuntivite, que são classificados de acordo com a sua etiologia. No Hospita...

  5. Regional Suppression of <em>Bactrocera> Fruit Flies (Diptera: Tephritidae in the Pacific through Biological Control and Prospects for Future Introductions into Other Areas of the World

    Directory of Open Access Journals (Sweden)

    Roger I. Vargas

    2012-08-01

    Full Text Available <em>Bactrocera> fruit fly species are economically important throughout the Pacific. The USDA, ARS U.S. Pacific Basin Agricultural Research Center has been a world leader in promoting biological control of <em>Bactrocera> spp. that includes classical, augmentative, conservation and IPM approaches. In Hawaii, establishment of <em>Bactrocera> <em>cucurbitae> (Coquillett in 1895 resulted in the introduction of the most successful parasitoid, <em>Psyttalia> <em>fletcheri> (Silvestri; similarly, establishment of <em>Bactrocera> <em>dorsalis> (Hendel in 1945 resulted in the introduction of 32 natural enemies of which <em>Fopius> <em>arisanus> (Sonan, <em>Diachasmimorpha> <em>longicaudata> (Ashmead and <em>Fopius> <em>vandenboschi> (Fullaway were most successful. Hawaii has also been a source of parasitoids for fruit fly control throughout the Pacific region including Australia, Pacific Island Nations, Central and South America, not only for <em>Bactrocera> spp. but also for <em>Ceratitis> and <em>Anastrepha> spp. Most recently, in 2002, <em>F.> <em>arisanus> was introduced into French Polynesia where <em>B.> <em>dorsalis> had invaded in 1996. Establishment of <em>D.> <em>longicaudata> into the new world has been important to augmentative biological control releases against <em>Anastrepha> spp. With the rapid expansion of airline travel and global trade there has been an alarming spread of <em>Bactrocera> spp. into new areas of the world (<em>i.e.>, South America and Africa. Results of studies in Hawaii and French Polynesia, support parasitoid introductions into South America and Africa, where <em>B.> <em>carambolae> and <em>B.> <em>invadens>, respectively, have become established. In addition, <em>P.> <em>fletcheri> is a candidate for biological control of <em>B.> <em>cucurbitae> in Africa. We review past and more

  6. CATETERES EM TERAPIA INTENSIVA

    Directory of Open Access Journals (Sweden)

    Carolina de Deus Lisboa

    2014-01-01

    Full Text Available Pesquisa com os objetivos de identificar falhas na administração de medicamentos por sondas e caracterizar a interrupção ou não da nutrição no caso de medicamentos que exigem jejum relativo. Estudo epidemiológico, transversal, observacional, numa terapia intensiva, com amostra de 350 doses administradas por 56 técnicos de enfermagem. Resultados mostraram que não houve pausa entre a administração do medicamento e a infusão de dieta enteral em 116 (33,14% doses de medicamentos que necessitavam de jejum relativo, entre os quais captopril, varfarina sódica, levotiroxina sódica, digoxina e fenitoína sódica. A irrigação das sondas não ocorreu na maioria dos casos (94,28%. Conclui-se que é possível que os medicamentos citados tenham tido sua biodisponibilidade sérica reduzida, comprometendo sua eficácia terapêutica e que a falta da prática de irrigar sondas com água estéril, antes de administrar medicamentos, configura-se como a ausência de um cuidado específico fundamental para evitar a obstrução das mesmas.

  7. Hemoptises em jovens adultos

    Directory of Open Access Journals (Sweden)

    Herbert Peter Know

    2008-07-01

    Full Text Available Resumo: A hemoptise é uma queixa médica frequente que pode requerer broncoscopia para o seu diagnóstico e tratamento. Não está completamente esclarecido quais são os doentes que beneficiam da broncoscopia como abordagem precoce. Está estabelecido que os jovens adultos com hemoptises são doentes de baixo risco, quando comparados com velhos; contudo, não há muitos trabalhos sobre o interesse da broncoscopia na abordagem deste grupo etário.Os autores resolveram avaliar, retrospectivamente, todos os doentes submetidos a broncoscopia por hemoptises, caracterizando a apresentação clínica e a avaliação diagnóstica dos jovens adultos (18 aos 40 anos, incluindo a utilidade diagnóstica da broncoscopia.Satisfizeram os critérios de inclusão 18 doentes. Na broncoscopia realizada nos doentes com hemoptises que apresentavam radiografia do tórax e T AC do tórax normal não foram identificadas quaisquer alterações endobrônquicas.Os autores, perante estes resultados preconizam que os doentes jovens adultos com hemoptises, com radiografias do tórax e TAC do tórax normais, não necessitam da avaliação broncoscópica inicial, devendo ser seguidos em follow-up clínico apertado.

  8. Activity-Guided Isolation of Antioxidant Compounds from <em>Rhizophora apiculataem>

    Directory of Open Access Journals (Sweden)

    Hongbin Xiao

    2012-09-01

    Full Text Available <em>Rhizophora apiculataem> (<em>R. apiculataem> contains an abundance of biologically active compounds due its special salt-tolerant living surroundings. In this study, the total phenolic content and antioxidant activities of various extract and fractions of stem of <em>R. apiculataem> were investigated. Results indicated that butanol fraction possesses the highest total phenolic content (181.84 mg/g GAE/g dry extract with strongest antioxidant abilities. Following <em>in vitroem> antioxidant activity-guided phytochemical separation procedures, lyoniresinol-3α-<em>O>-β-arabinopyranoside (1, lyoniresinol-3α-<em>O>-β-rhamnoside (2, and afzelechin-3-<em>O>-L-rhamno-pyranoside (3 were separated from the butanol fraction. These compounds showed more noticeable antioxidant activity than a BHT standard in the DPPH, ABTS and hydroxyl radical scavenging assays. HPLC analysis results showed that among different plant parts, the highest content of 13 was located in the bark (0.068%, 0.066% and 0.011%, respectively. The results imply that the <em>R. apiculataem> might be a potential source of natural antioxidants and 13 are antioxidant ingredients in <em>R. apiculataem>.

  9. Synthesis and characterization of CeO{sub 2} - TiO{sub 2} system for use in heterogeneous photocatalysis in photodegradation of methylene blue dye; Sintese e caracterizacao do sistema CeO{sub 2} - TiO{sub 2} para aplicacao em fotocatalise heterogenea na fotodegradacao do corante azul de metileno

    Energy Technology Data Exchange (ETDEWEB)

    Bragatto, Julia

    2016-07-01

    This study has as its goal the synthesis of a mixed oxide system type CeO{sub 2} - TiO{sub 2}, through the polymeric precursor method, to be used in heterogeneous photocatalysis. The synthesized materials were characterized by Thermogravimetry (TG), Derivative Thermogravimetry (DTG), Differential Thermal Analysis (DTA) and X-Ray Diffraction (XRD). The results of the thermal analysis showed in what temperature ranges certain events occur such as the formation of cerium oxide between 600 and 800 ° C, which refers to the crystallization of the material. Regarding the formation of titanium oxide, events between 600 and 800 ° C are perceived, which suggests the transformation of anatase to rutile phase. The XRD analysis showed no occurrence of the same phase for all materials, meaning that there is a variation in the formation of phases according to concentration of precursor for each sample. Noteworthy are the formation of CeO{sub 2} for Ce75-Ti25 and Ce50-Ti50 concentrations, with cubic crystal structure of the fluorite type. In Ce75-Ti25 and Ce25-Ti75 it is present the TiO{sub 2} in the anatase and rutile phase, with crystal structure of the tetragonal and tetrahedron type, respectively, as well as the formation of CeTi{sub 2}O{sub 6} in Ce50-Ti50 and Ce25-Ti75, with structure monoclinic. From these analyses, it is possible to see which samples, and in which temperatures of calcination the material has increased crystallinity, making the choice for their application in heterogeneous photocatalysis, aiming the degradation of methylene blue dye. Among the tested materials for methylene blue, the sample that stood out was the Ce50-Ti50, with calcination temperature of 800 °C, with values close to 50% degradation, because it was the sample that showed higher dye adsorption capacity, which is the step that precedes photodegradation. (author)

  10. Decision making process in oil exploration and production projects: a systemic approach by means of fuzzy logic theory application; Processo de tomada de decisao em projetos de exploracao e producao de petroleo: uma abordagem sistemica com aplicacao da teoria de logica fuzzy

    Energy Technology Data Exchange (ETDEWEB)

    Brana, Juan Pablo

    2008-12-15

    Oil is a non-renewable resource and maximizing the efficiency of its use is of the utmost importance, not only to private companies and the generation of their profit, but also to governments and their energy, economic and territorial planning. The aims of this thesis are, on the one hand, to breakdown, by means of a systemic approach, the complexity of the decision-making process in oil exploration and production projects (E and P), explaining, whenever possible, the theories and relationships that underlie their modeling contexts, and, on the other, to create a model - in the case of a specific E and P problem - to support the decision-making process, using the fuzzy logic theory. The variables analyzed include the probability of the exploration process achieving success, the size of reserves, the level or burden of taxation and the price of oil. In the case of the latter, the price of oil, the elements necessary for the elaboration of different scenarios have been provided. Finally, this model has been applied to a case study, providing continuity to previous work and discussing the results obtained. (author)

  11. Application of Monte Carlo method in study of the padronization for radionuclides with complex disintegration scheme in 4{pi}{beta}-{gamma} coincidence System; Aplicacao do metodo de Monte Carlo no estudo da padronizacao de radionuclideos com esquema de desintegracao complexos em sistema de coincidencias 4{pi}{beta}-{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, Mauro Noriaki

    2006-07-01

    The present work described a new methodology for modelling the behaviour of the activity in a 4{pi}{beta}-{gamma} coincidence system. The detection efficiency for electrons in the proportional counter and gamma radiation in the NaI(Tl) detector was calculated using the Monte Carlo program MCNP4C. Another Monte Carlo code was developed which follows the path in the disintegration scheme from the initial state of the precursor radionuclide, until the ground state of the daughter nucleus. Every step of the disintegration scheme is sorted by random numbers taking into account the probabilities of all {beta}{sup -} branches, electronic capture branches, transitions probabilities and internal conversion coefficients. Once the final state was reached beta, electronic capture events and gamma transitions are accounted for the three spectra: beta, gamma and coincidence variation in the beta efficiency was performed simulating energy cut off or use of absorbers (Collodion). The selected radionuclides for simulation were: {sup 134}Cs, {sup 72}Ga which disintegrate by {beta}{sup -} transition, {sup 133}Ba which disintegrates by electronic capture and {sup 35}S which is a beta pure emitter. For the latter, the Efficiency Tracing technique was simulated. The extrapolation curves obtained by Monte Carlo were filled by the Least Square Method with the experimental points and the results were compared to the Linear Extrapolation method. (author)

  12. Discontinuous finite element formulation for bodies of revolution with application in the prevention of fragile fracture in pressure vessel of PWR reactors; Formulacao de elementos finitos descontinuos para corpos de revolucao com aplicacao na prevencao de fratura fragil em vaso de pressao de reatores PWR

    Energy Technology Data Exchange (ETDEWEB)

    Benitez Alvarez, Gustavo

    1999-08-15

    In this work, a hybrid formulation is established for bodies of revolution, based on the equation of Fourier series for the discontinuous finite element method, analogous to the one that exists in the classical finite element method. Furthermore, a methodology to analyse the prevention of fragile fracture in pressure vessel of pressurized water reactors is presented. The results obtained suggest that careful analysis must be made for non symmetric refrigeration. (author)

  13. Application of the method ELECTRE II (Elimination and Choice Translating Algorithm) to support the customers order in liquefied petroleum gas distributors; Aplicacao do metodo ELECTRE II (Elimination and Choice Translating Algorithm) na ordenacao de clientes em uma distribuidora de gas liquefeito do petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Sobral, Marcos Felipe Falcao; Costa, Ana Paula Cabral Seixas [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2008-07-01

    The objective of this study is to promote the use of multi criteria decision method ELECTRE II to support the customers order in liquefied petroleum gas distributors, located in the Northeast of Brazil. The company has difficulties to rank the customers their factory, causing various difficult related like reduction of performance indicators and high costs with extra-hours. Finally, is presented a results comparison obtained by the method with the current results, performing a utilization viability analysis of method for this problem. (author)

  14. Investigation of barium-calcium aluminate process to manufacture and characterize impregnated thermionic cathode for power microwave devices; Investigacao do processo de obtencao de aluminatos de bario e calcio para construcao e caracterizacao de catodos termionicos impregnados para aplicacao em dispositivos de microondas de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Higashi, Cristiane

    2006-07-01

    In the present work it is described the barium calcium aluminate manufacture processes employed to produce impregnated cathodes to be used in a traveling-wave tube (TWT). The cathodes were developed using a tungsten body impregnated with barium and calcium aluminate with a 5:3:2 proportion (molar). Three different processes were investigated to obtain this material: solid-state reaction, precipitation and crystallization. Thermal analysis, thermogravimetry specifically, supported to determine an adequate preparation procedure (taking into account temperature, time and pyrolysis atmosphere). It was verified that the crystallization showed a better result when compared to those investigated (solid-state reaction and precipitation techniques - formation temperature is about 1000 deg C in hydrogen atmosphere), whereas it presented the lower formation temperature (800 deg C) in oxidizing atmosphere (O{sub 2}). It was used the practical work function distribution theory (PWFD) of Miram to characterize thermionic impregnated cathode. The PWFD curves were used to characterize the barium-calcium aluminate cathode. PWFD curves shown that the aluminate cathode work function is about 2,00 eV. (author)

  15. Quantification and location of emergency service mobile units and the failures in electric power distribution networks: application of hypercube model; Quantificacao e locacao de unidades moveis de atendimento de emergencia a interrupcoes em redes de distribuicao de energia eletrica: aplicacao do modelo hipercubo

    Energy Technology Data Exchange (ETDEWEB)

    Albino, Jean Carlo de Campos

    1994-11-01

    The basic hypercube queuing model, as well its approximated version, are normally used to analyze public emergency systems`performance. Both models, however, can be used only when the system has no geographical limitation of its Emergency Mobile Units (EMU), i.e, in systems in which the region`s atoms can be attended by any EMU, meaning that each EMU can over the entirety of the analysed region. In systems that does not present this property, one could only use simulation techniques. This paper presents an adaptation of the basic hypercube model that was developed for cases of urban emergency systems in which the EMU`s are not allowed or not worthwhile to cover the entire region. This adapted version is called Limited Hypercube Model (LHM). Modifications have been made in several steps of the basic model, and has brought a new analysis perspective, by amplifying the hypercube`s application universe and allowing mathematical description of some limited systems` specific features. The LHM was applied to analyze an electric energy distribution public service at Florianopolis, and the results are discussed in the paper. (author) 12 refs., 11 figs., 14 tabs.

  16. Application of the Voxeldose software for dosimetric evaluation on the thyroid during thorax-AP irradiation considering the peak voltages (k Vp) most used in diagnostic X-ray; Aplicacao do software Voxeldose para avaliacao dosimetrica na tireoide durante irradiacoes de torax-AP nas tensoes de pico (kVp) mais utilizadas em raio-X diagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, I.F.; Vieira, J.W., E-mail: igoradiologia@hotmail.co, E-mail: jwvieira@br.inter.ne [Instituto Federal de Educacao, Ciencia e Tecnologia de Pernambuco, Recife, PE (Brazil); Leal Neto, V., E-mail: viriatoleal@yahoo.com.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Lima, F.R.A., E-mail: falima@cnen.gov.b [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2009-07-01

    The evaluation of the absorbed dose distribution can be obtained through a computational model of exposures (ECM), being one the main difficulties at the specific dosimetric evaluation such as the radiodiagnostic, coupling the Monte Carlo computer code, developed for general use, to a anthropomorphic model. This problem can be solved by the software used in this paper, the VoxelDose, and it consists of an algorithm for X-ray diagnostic sources with the Monte Carlo EGS4 code coupled to the voxel anthropomorphic phantoms MAX (Male Adult voXel) and FAX (Female Adult voXel). The graphic interface allows the user to insert the mos common exams parameters, and to execute the simulation, obtaining conversion coefficients and the estimative of the deposited energy on organs/tissues radio sensible during the routine procedures. The data obtained were organized into graphics showing the thyroid equivalent dose, which is a radio sensible with 20 g mass and a weight factor of 5 %, compared with the effective dose during an irradiation of thorax-AP

  17. Analysis of the productive chain of Brazilian oil sector in the midst of ethics in the application of productive excess, social and environmental responsibility and ensuring the quality of life; Analise da cadeia produtiva do setor petrolifero brasileiro em meio a etica na aplicacao dos excedentes produtivos, a responsabilidade social e ambiental e a garantia da qualidade de vida

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Liodoro de; Domingos, Sergio Ricardo; Santos, Adilson Francisco dos [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Grupo de Engenharia da Energia

    2004-07-01

    The present work analyses the petroliferous productive chain, of the well you the rank. It shows the correlation with the ethics, the social responsibility and the guarantee of the quality of life human being. It considers it lives rational application of paid the resources preceding from royalties you the states and cities. With the reorganization of the petroliferous sector, in the second half of the decade of 90, lives specifically, with the edition of the Law n. 9.478/97, the decisions, until then, prevailed will be unilateral orientates of the federal government starts you count on the market, mediating agent of offers and demand. You the edition of the legal order, you the current days, the excellent facts ploughs dealt with transparency, the teams that if instituted the ANP, agency of regulating to character. The sector, with this, must give counterpart you the society, in the direction you reward the same one, will be possible damages or provoked aggressions, exactly that in involuntary way. Ethical The resolution of the conflicts follows an line of respect you the agents: companies, government and consumers. First with programs of professional qualification, the security, of institutional landmark, they stimulate the perfect competition and applies the exploratory balances in the form of royalties. And, the consumers, not less important, intent to ambient questions, demands quality US products. (author)

  18. Application of the Particle Swarm Optimization (PSO) technique to the thermal-hydraulics project of a PWR reactor core in reduced scale; Aplicacao da tecnica de otimizacao por enxame de particulas no projeto termo-hidraulico em escala reduzida do nucleo de um reator PWR

    Energy Technology Data Exchange (ETDEWEB)

    Lima Junior, Carlos Alberto de Souza

    2008-09-15

    The reduced scale models design have been employed by engineers from several different industries fields such as offshore, spatial, oil extraction, nuclear industries and others. Reduced scale models are used in experiments because they are economically attractive than its own prototype (real scale) because in many cases they are cheaper than a real scale one and most of time they are also easier to build providing a way to lead the real scale design allowing indirect investigations and analysis to the real scale system (prototype). A reduced scale model (or experiment) must be able to represent all physical phenomena that occurs and further will do in the real scale one under operational conditions, e.g., in this case the reduced scale model is called similar. There are some different methods to design a reduced scale model and from those two are basic: the empiric method based on the expert's skill to determine which physical measures are relevant to the desired model; and the differential equation method that is based on a mathematical description of the prototype (real scale system) to model. Applying a mathematical technique to the differential equation that describes the prototype then highlighting the relevant physical measures so the reduced scale model design problem may be treated as an optimization problem. Many optimization techniques as Genetic Algorithm (GA), for example, have been developed to solve this class of problems and have also been applied to the reduced scale model design problem as well. In this work, Particle Swarm Optimization (PSO) technique is investigated as an alternative optimization tool for such problem. In this investigation a computational approach, based on particle swarm optimization technique (PSO), is used to perform a reduced scale two loop Pressurized Water Reactor (PWR) core, considering 100% of nominal power operation on a forced flow cooling circulation and non-accidental operating conditions. A performance comparison between GA and PSO techniques is performed as it's obtained results to this problem. Obtained results shows that the proposed optimization technique (PSO) is a promising tool for a reduced scale experiments or equipment design, presenting advantages over other techniques. (author)

  19. Disruptive tension under normalized atmospheric pulse and residual tension on lightning arresters power systems: statistical methods application. Practical results and comments; Ensaios de tensao disruptiva sob impulso atmosferico normalizado e tensao residual em para-raios para sistemas de potencia: a aplicacao de metodos estatisticos. Comentarios e resultados praticos

    Energy Technology Data Exchange (ETDEWEB)

    Martinez, M.L.B. [ELETRONORTE, Brasilia (Brazil); Oliveira, A.L. [Eletricidade da Sao Paulo S.A. (ELETROPAULO), Sao Paulo, SP (Brazil)

    1991-12-31

    The necessity of complementary assays of disruptive tension under normalized atmospheric pulses and residual tension on lightning arresters, as well as the adequate use of a statistical treatment of its results are commented. Some statistical methods and its applicability on lightning arresters characteristics surveys, and its quality control are proposed 8 refs., 5 figs., 3 tabs.

  20. Production and characterization of compounds based on MgB{sub 4}O{sub 7} for application in dosimetry; Producao e caracterizacao de compostos a base de MgB{sub 4}O{sub 7} para aplicacao em dosimetria

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Luiza Freire de

    2016-07-01

    Many materials with luminescent properties are used for ionizing radiation dosimetry through the thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques. Detectors based on lithium fluoride (LiF), calcium sulphate (CaSO{sub 4}) and aluminum oxide (Al{sub 2}O{sub 3}), doped or codoped with various elements, are the TL or OSL commercial dosimeters most widely used currently. However, several researches are focused to the development of new TL /OSL materials in intention to enhance the dosimetric properties, in view that no TL/OSL dosimeter has all the ideal characteristics for monitoring the radiation. In this context, magnesium tetraborate (MgB{sub 4}O{sub 7}), which has been presented in the literature as a material for dosimetry TL, was investigated in this work. As there are no reports on the structural characterization of this material or regarding to its applicability on OSL dosimetry, the proposal of the present work was to develop compounds based on MgB{sub 4}O{sub 7}, with different doping, by solid state synthesis. It was made the structural, optical, TL and OSL characterization of the compound to verify it feasibility for application on radiation dosimetry. Initially, it was determined the calcination temperature and time for MgB{sub 4}O{sub 7} formation, with the use of thermal analyses and x ray diffraction. The ideal calcination was found at 900 °C for 7 hours. It were produced , in powder form, the compounds: MgB{sub 4}O{sub 7}, MgB{sub 4}O{sub 7}:Dy, MgB{sub 4}O{sub 7}:Dy,Li, MgB{sub 4}O{sub 7}:Ce, MgB{sub 4}O{sub 7}:Ce,Li, MgB{sub 4}O{sub 7}:Nd and MgB{sub 4}O{sub 7}:Nd,Li. For TL and OSL analyses it were produced pellets sintering at 950 °C for 2 hours. The radioluminescence (RL) analyses of MgB{sub 4}O{sub 7}:Dy and MgB{sub 4}O{sub 7}:Dy,Li shows wavelength emissions at 490, 590, 670 and 760 nm. For MgB{sub 4}O{sub 7}:Ce and MgB{sub 4}O{sub 7}:Ce,Li RL was observed wide emission band in the ultraviolet region. For the MgB{sub 4}O{sub 7}:Nd and MgB{sub 4}O{sub 7}:Nd,Li RL were not observed emission from the ultraviolet to infrared. With the results obtained from the TL characterization, it were also discussed aspects such as: effect of sintering and dopant concentrations in emissions, influence of doping and codoping with Li in MgB{sub 4}O{sub 7} matrix, thermal treatment reuse, TL signal reproducibility, dose response curve , relative sensitivity and it were analyzed the kinetic parameters of the TL emission curves. The OSL analyses of MgB{sub 4}O{sub 7}:Dy,Li,MgB{sub 4}O{sub 7}:Ce,Li and MgB{sub 4}O{sub 7}:Nd,Li indicated that the compounds have high cross section for photoionization to the wavelength emitted by blue LEDs, and from three compounds analyzed the MgB{sub 4}O{sub 7}: Ce,Li showed greater intensity. The partial preheating and partial cleaning methods allowed to elucidate the OSL phenomenology in compounds. (author)

  1. Neutron activation analysis for determining of inorganic trace elements in by-products of soybean, cotton, corn, wheat, sorghum and rice; Aplicacao da analise por ativacao com neutrons para determinacao de elementos inorganicos em subprodutos da soja, algodao, milho, trigo, sorgo e arroz

    Energy Technology Data Exchange (ETDEWEB)

    Teruya, Carla M.; Armelin, Maria Jose [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil); Silva Filho, Jose Cleto [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil). Ciencias Animais; Silva, Aliomar G. [Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA), Sao Carlos, SP (Brazil). Centro de Pesquisa de Pecuaria do Sudeste

    1999-11-01

    In the present paper the instrumental neutron activation analysis was applied to determine some essential and toxic elements in six agroindustrial by-products utilized to feed animal. The accuracy of the method was evaluated by means of reference material analysis. In general, the precision of the method was lower than 10% and the accuracy near to 5%. (author) 7 refs., 1 tab.

  2. Spare nonlinear systems resolution; its applicability in the resolution of the problem related power flow in electric power networks; Resolucao de sistemas nao-lineares esparsos; sua aplicacao na resolucao do problema de fluxo de carga em redes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Duran, Ana Cecilia

    1990-03-01

    This thesis aims to find a better way to solve large scale nonlinear sparse system problems giving special emphasis to load flow in electric power networks. The suggested algorithms are presented 63 refs., 28 figs., 16 tabs.

  3. Synthesis and characterization of Ce{sub 1-x}SmXO{sub 2-(x/2)} as solid electrolyte for application in IT-SOFCs; Sintese e caracterizacao de Ce{sub 1-x}SmXO{sub 2-(x/2)} como eletrolito solido para aplicacao em IT-SOFCs

    Energy Technology Data Exchange (ETDEWEB)

    Nicodemo, J.P.; Martinelli, A.E.; Nascimento, R.M. [Universidade Federal do Rio Grande do Norte (DECM/UFRN), Natal, RN (Brazil). Dept. de Engenharia de Materiais], e-mail: juli_pivotto@yahoo.com.br; Melo, D.M.A. [Universidade Federal do Rio Grande do Norte (DQ/UFRN), Natal, RN (Brazil). Dept. de Quimica; Cela, B. [Universidade Federal do Rio Grande do Norte (PPGCEM/UFRN), Natal, RN (Brazil). Programa de Pos-Graduacao em Ciencia e Engenharia de Materiais; Macedo, D.A. [Universidade Federal do Rio Grande do Norte (PPGEM/UFRN), Natal, RN (Brazil). Programa de Pos-Graduacao em Engenharia Mecanica

    2008-07-01

    Mixed rare earth doped CeO{sub 2} oxide-based have been extensively studied for use in solid electrolytes for fuel cells. Ceramics-based CeO{sub 2} have high ionic conductivity and enable the operation of solid oxide fuel cells (SOFCs) in intermediate temperatures, in the range of 500 to 750 deg C. In this work, was investigated the Sm{sub 2}O{sub 3} doped CeO{sub 2} by Pechini method to obtain Ce{sub 0,9}Sm{sub 0,1}O{sub 1,95}. The resulting powders were characterized by the chemical composition (EDS) and crystallographic (XRD), thermal analysis (TG/ATD and DTG), and particles morphology (SEM). After calcinations of 500 and 700 deg C for 2 hours were obtained nanosized powders with crystalline structure of cubic phase type fluorite fully formed. (author)

  4. Application of the probe Horiba U-23 in the analysis of physical-chemical parameters of groundwater influences on the Osamu Utsumi uranium mine in Caldas-MG; Aplicacao da sonda Horiba U-23 na analise de parametros fisico-quimicos das aguas subterraneas sobre influencia da mina de uranio Osamu Utsumi em Caldas-MG

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Flavio H.S., E-mail: flaviohsmoreira2@gmail.com [Universidade Federal de Alfenas (UNIFAL), Pocos de Caldas, MG (Brazil); Alberti, Heber L.C.; Silva, Nivaldo C., E-mail: heber@cnen.gov.br, E-mail: ncsilva@cnen.gov.br [Comissao Nacional de Energia Nuclear (LAPOC/CNEN-MG), Pocos de Caldas, MG (Brazil). Laboratorio de Pocos de Caldas; Fleming, Peter Marshall, E-mail: pmf@cnen.gov.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, BH (Brazil)

    2013-07-01

    This study presents data on the analysis of physical-chemical parameters of groundwater in the uranium mine Osamu Utsumi, belonging to the Industrias Nucleares do Brasil - INB, in the municipality of Caldas. This work is part of the team responsible for the evaluation of Plano de Recuperacao de Areas Degradadas (PRAD), team consists of researchers from Laboratorio de Pocos de Caldas - LAPOC and of the Centro de Desenvolvimento Tecnologico Nuclear - CDTN, units of the Comissao Nacional de Energia Nuclear - CNEN. Sampling was carried out in eleven wells in the 'bota-fora 4' area and digs mine. Analyses of groundwater quality were performed using the multiparameter probe Horiba U23, recent acquisition of LAPOC. The results characterize the groundwater of ten wells monitored as acidic and with a high electrical conductivity, due to the impacts caused by drainage Mining Acid (DAM)

  5. Study of phase transformation of U-2,5Zr-7,5Nb e U-3Zr-9Nb alloys for application in advanced nuclear fuel; Estudo das transformacoes de fases nas ligas U-2,5Zr-7,5Nb e U-3Zr-9Nb para aplicacao em combustivel nuclear avancado

    Energy Technology Data Exchange (ETDEWEB)

    Pais, Rafael Witter Dias

    2015-07-01

    Metal fuels are relevant in the nuclear area due to the versatility of its use in the nuclear fuel cycle. Among the alloys of uranium investigated with high potential for use in nuclear power reactors, U-Zr-Nb alloys appear as an important alternative because of their superior physico-chemical and metallurgical properties. These alloys have also potential for use in nuclear testing, research and production radioisotopes of high performance nuclear reactors. Therefore, the development of these alloys is strategic since they are planned to be used in national reactors as RMB (Brazilian Multipurpose Reactor) and LABGENE (Electrical Generation Core Laboratory), currently under development in Brazil. In this work it was realized a extensive study in the scope of the manufacturing, heat treatment and phase transformations of U-2,5Zr-7,5Nb (m/m%) and U-3ZR-9NB (m/m%) fuel alloys. Ingots of both alloys were produced employing a specific methodology developed in this study. This methodology comprised the melting process in a vacuum induction furnace at high temperatures (1500 °C) and thermal-mechanical processing to break the as-cast structure. Samples with typical dimensions (17 x 7 x 2.5 mm) free from macrostructural defects were homogenized at 1000 °C in vacuum of 10{sup -5} torr for 17.5 hours with a 10°C/min cooling rate until to 820 °C and, subsequently, quenched in water. The samples, randomly selected, were subjected to isothermal treatment tests under different conditions of time and temperature. Isothermal treatments for transformation and retention phases were carried out in a special assembly designed for this work. After the tests, the samples were characterized by the usual phase characterization techniques with particular emphasis for the X-ray diffraction technique. In this way, the Rietveld refinement method was applied. In the case of uranium based alloys it is quite challenging due to the lack of data in the literature. In this work a strategy for the Rietveld refinement with an extensive study of refinement parameters was established. The results allowed to establish a comparative study with the few results available in the literature and to obtain the TTT diagrams of initial transformation for both alloys. Finally, this work provides significant innovations to the field of knowledge of the alloys studied which will contribute to the development of nuclear fuel for high performance nuclear reactors. (author)

  6. Application of reliability centered maintenance (RCM) to the gas compression system of the platforms P-09 and P-19 (E and P from Bacia de Campos, RJ, Brazil); Aplicacao de manutencao centrada em confiabilidaade (MCC) ao sistema de compressao de gas das plataformas P-09 e P-19 (E e P da Bacia de Campos)

    Energy Technology Data Exchange (ETDEWEB)

    Diniz, Flavio L.B.; Oliveira, Luiz F.S. de [DNV Principia Ltda., Macae, RJ (Brazil); Frydmana, Bernardo; Okada, Ricardo Okada [PETROBRAS, Macae, RJ (Brazil). Exploracao e Producao. Gerencia de Logistica

    2000-07-01

    In this paper, the main results of the application of Reliability Centered Maintenance (RCM) to the gas compression systems of Platforms P-09 (Turbine Taurus 60) and P-19 (Turbine Mars 90) are presented. RCM is a method whose central paradigm is to preserve systems' functions, unlike traditional maintenance, which focus on equipment maintenance, without care about systems' functions and the allocation of maintenance resources. A total of 654 components were analyzed at P-19 and 551 at P-09, and about 650 maintenance tasks were established. Besides the results, this paper presents details of the method and some comments about its applicability in other systems. (author)

  7. Trimerization process of vegetables oils and fats and its application in additives for synthetic fluids used in the perforation of petroleum well bore; Processo de trimerizacao de oleos vegetais e acidos graxos e sua aplicacao em aditivos para fluidos sinteticos utilizados na perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Viviane X.; Souza, Roberta C.R.; Coelho, Anderson S.; Lopes, Grazielle; Yoshida, Renan O.; Goncalves, Gizelle de Fatima G.D.V.; Silva, Sandra Regina da [Centro Tecnico Aeroespacial (CTA), Sao Jose dos Campos, SP (Brazil). Centro de Tecnologia; Poland Quimica Ltda., Macae, RJ (Brazil)

    2007-07-01

    Derivatives of vegetable oils and fatty acids such epoxides, polyols and fatty acid dimmers are industrially used for a variety of polymer applications, such as additives for plastics and composites and in filtration control aid in in perforation fluids as well as in the synthesis of polyamides and polyurethanes. In this article a vegetable oil was chemically modified by trimerization and used as filtration control and in a paraffin based perforation fluid. The rheology and filtration parameters were studied and the results were compared to desired specifications to maintenance of stability of well bore. (author)

  8. Wetting evaluation of silver based braze alloys onto zirconia metalized with reactive elements for application in oil well drill bots; Avaliacao do molhamento de ligas de adicao a base de prata sobre zirconia polida e metalizada com elementos ativos para aplicacao em brocas de perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, J.C.; Silva, J.M.; Santos, P.R.F.; Nascimento, R.M.; Martinelli, A.E. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Engenharia de Materiais], Email: jocabuzo@gmail.com; Pimenta, J.S. [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica

    2010-07-01

    Drill bits with hard ceramic inserts are often used on drilling operations. The cutting and crushing action of rocks will produce failures in the tricone bits, which are related to wear; total or partial rupture of the drill bit body or even the inserts; thermal shock and corrosion. The research of better drill bits with ceramic inserts thermally more stable and mechanically stronger, will lead to an increase of their lifetime, and so reducing costs of substitution and maintenance. In the present work, some silver based braze alloys were melted onto zirconia YSZ substrates metallized or not with active metals. inside a furnace with vacuum of 10{sup -5} mbar to evaluate the wetting behavior. The system with AgCuTi and the non metallized YSZ ceramic, showed low contact angles and stable interfaces, which may be appropriate for brazing metal/ceramic parts. (author)

  9. Application of the perturbed angular correlation in the investigation of hyperfine interactions in compounds of hafnium, indium and cadmium with F{sup 1-}, OH{sup 1-} and EDTA ligands; Aplicacao da espectroscopia de correlacao angular perturbada na investigacao de interacoes hiperfinas em compostos de hafnio, indio e cadmio com os ligantes F{sup 1-}, OH{sup 1-} e EDTA

    Energy Technology Data Exchange (ETDEWEB)

    Amaral, Antonio Acleto

    2011-07-01

    In this study the hyperfine parameters, including the dynamical nature, Perturbed Angular Correlation (PAC) spectroscopy was used to measure the hyperfine parameters in molecules of ligand compounds in solutions. The measurements were carried out at 295 K and 77 K using {sup 111}In {yields} {sup 111}Cd, {sup 181}Hf {yields} {sup 181}Ta and {sup 111m}Cd {yields}{sup 111}Cd, as probe nuclei. Samples were prepared by adding a small volume of radioactive solution containing the probe nuclei in aqueous solution, buffer solution and ethylenediaminetetraacetic acid (EDTA) used as a ligand with pH 4.3 which correspond to the pH of the saturated EDTA solution and in buffer solution with pH between 9 and 10. The results made possible to understand the impact of each method for PAC measurements. Finally a comparative analysis for the several methods of inserting of the probe nuclei in the sample was made, considering chemical and nuclear aspects. The lack of measurements in this kind of samples justifies the importance of the obtained results. (author)

  10. Implementation and application of a method for quantifying metals and non-metals in drainage water from soils fertilized with phosphogypsum; Implementacao e aplicacao de metodologia para dosagem de metais e nao metais em aguas de drenagem de solos adubados com fosfogesso

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Camila Goncalves Bof

    2010-07-01

    Phosphogypsum is a waste generated in phosphoric acid production by the 'wet process'. The immense amount of phosphogypsum yearly produced (around 150 million tons) is receiving attention from environmental protection agencies all over the word, given its potential of contamination. In Brazil, this material has been used for many decades, especially for agricultural application on cropland. Although the phosphogypsum is mainly composed of dehydrated calcium sulfate, it can have high levels of impurities, such as metals (Cd, Cr, Cu, Pb), non-metals (As and Se) and radioactive elements from natural series of {sup 232}Th and {sup 238}U. Therefore, its continuous application as an agricultural agent can result not just in soil contamination, but also contamination of the surface and groundwater due to the runoff and infiltration process. The concern associated with the contamination of aquatic environments increases; when water is used for human consumption, requiring progressive adoption of more restrictive limits. However, some of the conventional analytical techniques used to determine the maximum limit of contaminants in water have detection limits above the maximum limits established by the environmental legislation. This work was aimed to evaluate the mobility of metals and non-metals in soils and, consequently, the contamination of drainage water through greenhouse-scale leaching and transport of toxic elements from soils fertilized with phosphogypsum. Hence, methods were studied and implemented for determination of metals (Cd, Cr, Cu and Pb) using Furnace Graphite Atomic Absorption Spectrometry (GF AAS), as well as for non-metals (As and Se) using Inductively Coupled Plasma Mass Spectrometry (lCP-MS). Effects of different chemical modifiers on the determination of Cd, Cr, Cu and Pb concentration by GF AAS were also investigated. In general, it was observed that the metal and non-metal concentration were below than the actual detection limit of the equipment for all conditions of interest, indicating the low mobility of the analyzed elements in the soil column. (author)

  11. Analysis of X-ray diffraction of the titanium dioxide (TiO{sub 2}) synthesized by the Pechini Method for application in heterogeneous photocatalysis processes; Analise de difracao de raios X do dioxido de titanio (TiO{sub 2}) sintetizado pelo metodo Pechini para aplicacao em processos de fotocatalise heterogenea

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, P.L.; Araujo, D.S.; Costa, A.C.F.M.; Oliveira, L.S.C., E-mail: palomalima_eq@yahoo.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil)

    2016-07-01

    Titanium dioxide (TiO{sub 2}) is a polymorph commonly applied to heterogeneous photocatalysis processes for being relatively inexpensive and photo - stable. It is usually found in three different crystalline phases (anatase, rutile and brookite), which directly interfere in their photocatalytic efficiency. Therefore, this study aimed to investigate the obtainment of TiO{sub 2} by Pechini method in different conditions for application in the heterogeneous photocatalysis process. For this purpose, it was evaluated by analysis of X-ray diffraction (XRD ) the behavior of TiO{sub 2} materials synthesized in proportions of 2:1 and 3:1 (titanium isopropoxide/citric acid), pyrolyzed at 300°C/3h and 400°C /h and calcined at 400°C and 500°C/1h. The results revealed that the TiO{sub 2} samples produced in the ratio of 2:1 and 3:1 isopropoxide/citric acid and calcined at 500°C/h presented the best results. (author)

  12. Inflammatory process decrease by gallium-aluminium-arsenide (GaAlAs) low intensity laser irradiation on postoperative extraction of impacted lower third molar; Reducao de processo inflamatorio com aplicacao de laser de arseneto de galio aluminio ({lambda}=830 nm) em pos-operatorio de exodontia de terceiros molares inferiores inclusos ou semi-inclusos

    Energy Technology Data Exchange (ETDEWEB)

    Atihe, Mauricio Martins

    2002-07-01

    This study aimed the observation of inflammatory process decrease by the use of GaAlAs Low Intensity Laser ({lambda}=830 nm; 40 mW) irradiation. Five patients were selected and submitted to surgery of impacted lower third molars, both right and left sides at different occasions. On a first stage, a tooth of a random chosen side - right or left - was extracted by conventional surgery, without LILT. The inflammatory process was measured at postoperative on the first, third and seventh days. This side was then called 'control side'. After 21 days, period in which the inflammatory process of the first surgery was terminated, the other side surgery took place, this time using LILT (4 J at four spots) at postoperative, first and third days. As the previous surgery, the inflammatory process was also measured at postoperative on the first, third and seventh days. This side was called 'experimental or lased side'. The inflammatory process was evaluated by measuring its four characteristic signs: swelling, pain, color and temperature. It was clearly observed a decrease for swelling, pain and color on the lased side which presented significant inference and descriptive statistics. It can be concluded that GaAlAs Low Intensity Laser ({lambda}=830 nm) can surely be used as an additional and important anti-inflammatory source on impacted lower third molar surgeries. (author)

  13. Optimization of surface network and platform location using a next generation reservoir simulator coupled with an integrated asset optimizer application to an offshore deep water oil field in Brazil; Otimizacao de redes de superficie e locacao da plataforma atraves do acoplamento de um simulador de reservatorios de nova geracao e um otmizador global de ativo: aplicacao em um campo offshore

    Energy Technology Data Exchange (ETDEWEB)

    Campozana, Fernando P.; Almeida, Renato L. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Madeira, Marcelo G.; Sousa, Sergio H.G. de; Spinola, Marcio [Halliburton Servicos Ltda., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    To design, modify, and expand surface facilities is a multidisciplinary task which involves substantial financial resources. It can take months or years to complete, depending on the size and level of detail of the project. Nowadays, the use of Next Generation Reservoir Simulators (NGRS) is the most sophisticated and reliable way of obtaining field performance evaluation since they can couple surface and subsurface equations, thus eliminating the need of lengthy multiphase flow tables. Furthermore, coupling a NGRS with an optimizer is the best way to accomplish a large number of simulation runs on the search for optimized solutions when facilities are being modified and/or expanded. The suggested workflow is applied to a synthetic field which reproduces typical Brazilian offshore deep water scenarios. Hundreds of coupled simulation runs were performed and the results show that it is possible to find optimal diameters for the production lines as well as the ideal location for the production / injection platform. (author)

  14. Optical and structural characterization of the pure and doped BaY{sub 2}F{sub 8} with rare earths for application in radiation detectors and scintillators; Caracterizacao optica e estrutural do BaY{sub 2}F{sub 8} puro e dopado com terras raras visando aplicacao em detectores de radiacao e cintiladores

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Ana Carolina Santana de

    2008-07-01

    In this work Barium Yttrium Fluoride (BaY{sub 2}F{sub 8} -BaYF) doped with different concentrations of ions Tb{sup 3+}, Er{sup 3+}, Tm{sup 3+} e Nd{sup 3+} were characterized, aiming the application in radiation detection devices that use the scintillating properties. Two types of samples were produced in the CLA-IPEN-SP, polycrystalline samples, obtained via solid state reaction of BaF{sub 2} and YF{sub 3} under HF atmosphere, and single crystals, obtained via the zone melting method also in a HF atmosphere. The samples were characterized using the following experimental techniques: X-ray powder diffraction, Radioluminescence (RL), Optical Absorption and Dispersive X-ray Absorption Spectroscopy (DXAS). The X-ray diffraction pattern showed the presence of the phase BaY{sub 2}F{sub 8} and a small amount of the phase Ba{sub 4}Y{sub 3}F{sub 17} in the polycrystalline pure and Tb{sup 3+}doped samples. The other samples showed only the desired BaY{sub 2}F{sub 8} phase. The radioluminescence measurements of the doped BaYF, when irradiated with X-rays, showed emission peaks in energies that are characteristics of the 4f-4f transitions of rare earths. The RL of the samples with 2 mol por cent and 3 mold of Tb{sup 3+}showed quite intense peaks with a maximum emission peak at 545 nm. The Tm{sup 3+}doped BYF showed that the scintillation efficiency is not directly proportional to the doping level, and the highest RL emission were obtained for the polycrystalline samples doped with 1 mol por cent, showing a maximum peak intensity at 456 nm (the blue region of the visible spectrum). All samples showed a phosphorescent decay time of the order of seconds. Single crystals of BaYF doped with 2 mol por cent of Er{sup 3+}, in addition to one of the highest phosphorescence time, presents a quite strong Rl in the green region of the spectra. The radiation damage was evaluated by the optical absorption techniques and the results showed that the formation of the absorption bands can be connected to colors centers generated by radiation in the matrix. Measurements of DXAS, done at the LNLS DXAS beamline, revealed that there is no change in the absorption edge of the dopant during irradiation. Among ali samples, the Nd{sup 3+} ones presented the lowest scintillation efficiency with maximum emissions in the infrared region. (author)

  15. Validation of the extension of the range of application and of the single system of injection for the determination of total nitrogen in petroleum and its derivatives by chemiluminescence; Validacao da ampliacao da faixa de aplicacao e do sistema unico de injecao para a determinacao de nitrogenio total em petroleos e derivados por quimiluminescencia

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Maria de Fatima Pereira dos [Fundacao Gorceix, Ouro Preto, MG(Brazil)]. E-mail: santos@cenpes.petrobras.com.br; Tamanqueira, Juliana Boechat [Universidade Federal Fluminense, Niteroi, RJ (Brazil); Magalhaes, Julio Cesar Dias [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas. Avaliacao de Petroleo; Oliveira, Elcio Cruz de [Transpetro, Rio de Janeiro, RJ (Brazil). Logistica e Planejamento; Vaitsman, Delmo Santiago [Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Quimica. Dept. de Quimica Analitica

    2003-12-01

    With the objectives of using a single system of injection and of extending the range of application for the method ASTM D4629/02 'Total Nitrogen in Petroleum Derivatives by the System of Injection with a Syringe and Detection by Chemo- Luminescence', it was studied a procedure by statistical validation with the objective of guaranteeing the analytical reliability of the assay and allowing the inclusion of samples of petroleum and heavy derivatives in one single methodology. The determination of total nitrogen for petroleum and derivatives is traditionally assayed using the method of Kjeldahl - a time-consuming methodology that requires a large amount of time for giving the final result, at the same time that is not recommended for concentrations below 0.1%w/w, which does not meet the requirements for the specifications of the product, in the petroleum industry. An alternative for the method of Kjeldahl is the pyro-chemo luminescence, which allows the achievement of more repetitive results for total nitrogen. In the detection of nitrogen, the technique combines the reliability of oxidative combustion with the sensitivity of chemiluminescence. Therefore, it was developed a protocol of validation in the methodology ASTM D4629/02 for the validation of the extension of the range of application and for the evaluation of the performance of the equipment in analytical conditions, according to the calibration curve. (author)

  16. Development of controller of acquisition and sample positioner for activation for use in measurements of short half-life radioisotopes; Desenvolvimento de dispositivo movimentador automatizado de amostras com vista a aplicacao em medidas de radioisotopos que possuem curto tempo de meia-vida

    Energy Technology Data Exchange (ETDEWEB)

    Secco, Marcello

    2016-08-01

    High resolution gamma spectroscopy measurements have several applications. Those involving short half-life radioisotope measurements may present low precision problems when the radioactive source is far from detector end cup and in the very high activity situations also can present accuracy loss due to dead time and pile-up effects. A way to overcome these problems is changing the source detector distance as the activity is decreasing, and thereby maximizing the statistical counting. In the present study, the Controller of Acquisition and Sample Positioner for Activation (CASPA) was developed. It is a low cost and weight device, made with low atomic number materials designed to assist gamma spectroscopy measurements, which is able to control the distance between the source and the detector, even allowing that there is a change of this distance during the measurement process. Because it is automated it optimizes the time of the operator, who has complete freedom to program their routine measurements in the device besides minimizing the radiation dose in the operator. An interface that allow the user control the CASPA system and to program the acquisition system was created. Tests aiming to optimize the operation of CASPA system were carried out and the safety of the CASPA operation was verified, it was not presented any failure during their tests. It was applied the repeatability tests by the acquisition {sup 60}Co standard source and was found that the positioning of automated system has reproduced the results of static system with a 95% of confidence level. (author)

  17. Study of application of protective measures for the public and remediation of contaminated areas in case of nuclear and / or radiological accidents in Brazil; Estudo da aplicacao de medidas de protecao para o publico e de remediacao de areas contaminadas em caso de acidentes nucleares e/ou radiologicos no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Diogo Neves Gomes da

    2011-07-01

    Since the radiological accident in Goiania in 1987, the IRD (Institute of Radiological Protection and Dosimetry - IRD / CNEN) has been developing tools to support decision-making processes after a nuclear or radiological accident which leads to an environmental contamination and to an exposure of individuals the public These processes include the establishment of a supporting multicriteria model, which involves the application of protective and remediation measures of contaminated areas in tropical environments. In this study, it was performed an evaluation of the efficiency of these measures in order to determine the consequences of their implementation, based on results obtained from the code SIEM (Emergency Integrated System), which constitutes an environmental mode1 developed at IRD to simulate this type of accident. In order to perform this evaluation, it was first developed a database containing descriptions of various protection/remediation measures, which could be applied nationwide. Afterwards, some basic scenarios were established, considering the environmental, housing and food characteristics of the population of the vicinity of the nuclear power plants in Angra dos Reis (state of Rio de Janeiro). Thus, the accident simulations were carried out separately containing releases of {sup 137}Cs, {sup 90}Sr and 131 I. The results showed that the dose reduction varies according to the extent and the timing of the remediation measure applied. Although it is possible to establish some basic guidelines, generic solutions are not recommended, since the resulting doses are highly dependent on the actual situation. Any decision-making process should be made case by case, according to the actual conditions of the affected area and to the occupation characteristics and use of the affected areas, considering the characteristics of the source term of contamination, the time of the year in which the accident occurs, the local agricultural practices and food habits of real people affected. For both types of area, it was observed that it would be appropriate to assign the security measures according to three criteria: (i) its efficiency in reducing the doses in the first year, (ii) its efficiency in reducing the dose of long-term and (iii) the effect of delay in implementing the measure efficiency in reducing doses. Finally, the results of this work will be complemented in the database in order to provide support for multi-criteria analysis in decisionmaking process after this type of accident. (author)

  18. Application of magnetic nanoparticle MnFe{sub 2}O{sub 4} type as a catalyst in esterification reaction; Aplicacao de nanoparticula magnetica do tipo MnFe{sub 2}O{sub 4} como catalisador em reacao de esterificacao

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, K.R. de O.; Barros, A.B. de S.; Moura, T.F.B. de; Vilar, E.; Dantas, J.; Costa, A. C. F. de M., E-mail: klebersonric@gmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Laboratorio de Sintese de Materiais Ceramicos

    2016-07-01

    The interest in obtaining renewable energy arouses the interest of researchers in the development of biofuels to replace conventional fuels. This work aimed to obtain magnetic nanoparticle MnFe{sub 2}O{sub 4} and evaluate their performance as a catalyst in esterification reaction to obtain biodiesel. The sample was synthesized through the combustion reaction and characterized by XRD, SEM and BET. The esterification reaction, the methyl ethyl route was conducted in a high pressure reactor at 180 ° C for 1 hour with oil molar ratio 1:12 alcohol with 2% catalyst. The results indicate the formation of the phase MnFe{sub 2}O{sub 4} and agglomerate in the form of irregular plate, with particles bound strongly to the surface of the agglomerates. The catalytic tests showed that sample was active for the reaction of esterification methyl ethyl route, with conversions of 52% and 48%, respectively. (author)

  19. Tratamento da dor em queimados

    Directory of Open Access Journals (Sweden)

    Rodrigo José Alencar de Castro

    2013-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Apesar dos avanços, ainda é observado manejo analgésico inadequado dos pacientes com queimaduras. O objetivo desta revisão foi coletar dados sobre tratamento da dor em queimados. CONTEÚDO: Foi feita revisão sobre os mecanismos de dor, avaliação do paciente com queimadura e o tratamento farmacológico e não farmacológico. CONCLUSÕES: O manejo da dor em pacientes vítimas de queimaduras ainda é um desafio por parte da equipe multiprofissional. A avaliação frequente e contínua da resposta apresentada pelo paciente é muito importante, tendo em vista os vários momentos por que passa o paciente internado em decorrência de uma queimadura, além de uma terapêutica combinada com medicações analgésicas e medidas não farmacológicas. Entender a complexidade de alterações fisiopatológicas, psicológicas e bioquímicas apresentadas por um paciente em tratamento de queimadura é o primeiro passo para alcançar o sucesso no seu manejo analgésico.

  20. Imagens de um Sujeito em Devir: Autorretrato em Rede

    Directory of Open Access Journals (Sweden)

    Camila Leite Araujo

    2012-06-01

    Full Text Available Este artigo se prope a discutir o fenmeno da circulao das fotografias pessoais em plataformas virtuais e o surgimento de uma possvel nova esttica do cotidiano e do efmero. Assim, iniciamos com um quadro conceitual sobre as possibilidades da fotografia digital referentes s imagens do cotidiano e apresentamos uma anlise sobre as particularidades estticas do autorretrato contemporneo, um processo de criao que envolve conceitos como fabulao, performance e o efmero, em um espao de interao com as ferramentas de comunicao na comunidade do Flickr.

  1. Alcaloides pirrolizidinicos em borboletas Ithomiinal : alguns aspectos em ecologia quimica

    OpenAIRE

    Jose Roberto Trigo

    1993-01-01

    Resumo: Alcalóides pirrolizidínicos (PAs) são ésteres de 1-metilhidroxilpirrolizidínas, sendo o aminoálcool chamado de base necina e a parte ácida de ácidos nécicos. Geralmente ocorrem em forma de monoésteres, diésteres abertos ou cíclicos, podendo apresentar uma insaturação no anel (PAs insaturados) ou não (PAs saturados). Estas substâncias apresentam mais de 200 estruturas isoladas de plantas, ocorrendo principalmente em Senecio, Eupatorium (Asteraceae), Crotalaria (Fabaceae) e Heliotropium...

  2. Consumo ecologicamente consciente em Portugal

    OpenAIRE

    Schoor, Maria Adelaide Oliveira van

    2013-01-01

    Dissertação apresentada à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Ciências da Comunicação, ramo de Marketing e Publicidade Esta Dissertação de Mestrado faz uma análise ao consumo ecologicamente consciente em Portugal. Tento em conta as questões ambientais que tem vindo a ser debatidas nas últimas décadas, o desenvolvimento de estratégias de produção e promoção de produtos e serviços mais ecológicos tem vindo a aumentar significativamente. A...

  3. Objetos mediadores em museus

    Directory of Open Access Journals (Sweden)

    Inês Ferreira

    2015-02-01

    Full Text Available Um museu participativo incentiva a que a experiência da visita seja criativa e pessoal. Facilita a participação biográfica do visitante - com a sua experiência, conhecimento e interesses. Muitas exposições, porém, não promovem esse envolvimento pessoal. Neste artigo apresentamos uma revisão da literatura que indicia que a mediação com objetos mediadores facilita o envolvimento pessoal, a construção de conhecimento e a criatividade. O problema teórico que colocamos é se os museus mais tradicionais se podem abrir à participação e, neste contexto, o nosso objetivo é perceber que papel podem ter os objetos mediadores nesse processo. Discutimos o recurso a objetos mediadores como forma de adicionar múltiplos níveis de relação e modos de ver, potencial que consideramos subaproveitado em muitos museus. Começamos por apresentar o museu como espaço potencialmente participativo, que convida a um envolvimento ativo e crítico – ativo, porque o visitante é desafiado a fazer coisas; crítico, porque é estimulado a pensar, optar, discutir e refletir. Discutimos depois diferentes formas de usar objetos mediadores para incentivar o visitante a um envolvimento com os artefactos, recorrendo à memória, experiência, conhecimento e sentimentos. A participação biográfica potencia o cruzamento entre o mundo interior do visitante e os artefactos e conteúdos do museu. Esse espaço de cruzamento - inbetween - é o espaço da construção de conhecimento. Apresentamos diversas formas de um museu, mesmo não sendo interativo, se tornar mais criativo e participativo, o que pode contribuir para uma mudança nas práticas dos museus, nomeadamente na montagem e remodelação de exposições permanentes.

  4. Rural Emergency Medical Services (EMS) and Trauma

    Science.gov (United States)

    ... Guide Rural Health Topics & States Topics View more Rural Emergency Medical Services (EMS) and Trauma Emergency medical ... injuries treated in emergency departments? How can a rural EMS unit find funding for major equipment, such ...

  5. EM Mortar Technology Development for Indirect Fire

    National Research Council Canada - National Science Library

    Turman, B. N; Kaye, R. J; Crawford, M; Magnotti, P; Nguyen, D; van Reuth, E; Johnson, S. A; Poppe, R

    2006-01-01

    The DARPA Electromagnetic (EM) Mortar Laboratory Demonstration Program is a focused development and demonstration effort for an EM gun system for vehicle-based, non-line-of-sight, artillery applications...

  6. Trombo flutuante em veia femoral

    Directory of Open Access Journals (Sweden)

    Matheus Bertanha

    2017-12-01

    Full Text Available Resumo O trombo venoso flutuante em veia femoral é um tipo de trombo com alto potencial de embolização pulmonar. Entretanto, ainda é controversa a conduta mais apropriada nesses casos. Tratamentos clínicos com anticoagulantes ou fibrinolíticos e trombectomias abertas ou por meio de dispositivos endovasculares vêm sendo empregados ainda sem um critério de indicação bem definido. Apresentamos três casos clínicos de trombos flutuantes em veia femoral, de etiologias distintas, cujos tratamentos e respectivas evoluções serão discutidos.

  7. Eletrons interagentes em bilhares magneticos

    OpenAIRE

    Luis Gregorio G. de V. Dias da Silva

    2002-01-01

    Resumo: Consideramos o problema de dois elétrons confinados em um Bilhar quadrado, interagindo por um potencial repulsivo de alcance finito do tipo Yukawa e sujeitos a um campo magnético ortogonal. Calculamos o espectro de energia do sistema para singletos e tripletos de spin em todas as classes de simetria como função da intensidade e alcance da interação e do campo magnético. Mostramos que a natureza de curto alcance da interação suprime a formação de estados fundamentais "Moléculas de Wign...

  8. Factores de risco em implantologia

    OpenAIRE

    Sousa, Inês Silveira e Luz Nunes de

    2015-01-01

    A Implantologia tem ganho popularidade na medicina dentária pelos resultados previsíveis em reabilitações de áreas edêntulas, permitindo minimizar as consequências funcionais, fonéticas e estéticas que advém da perda de dentes através de uma solução fixa que satizfaz os pacientes. Esta é uma revisão da literatura existente sobre factores de risco, fracassos e complicações inerentes ao tratamento com implantes dentários. Categorizam-se os factores de risco em implantologia co...

  9. Efeito da enxertia em mandioca

    OpenAIRE

    Bomfim, Nayra Nascimento

    2011-01-01

    Enxertos de duas espécies silvestres (M. glaziovii e M. fortalezensis) sobre M. esculenta, mandioca, foram estudados morfologicamente, anatomicamente e citogeneticamente e a fim de se avaliar possíveis efeitos devido à interação entre enxerto e porta-enxerto. Foram feitas análises anatômicas das raízes dos porta-enxertos UnB 201 e UnB 122 (variedades de M. esculenta), em comparação com as variedades não enxertadas. Analisou-se a meiose em enxerto da espécie M. glaziovii que apresentava morfol...

  10. Adaptabilidade e estabilidade em aveia em ambientes estratificados

    Directory of Open Access Journals (Sweden)

    Bertan Ivandro

    2005-01-01

    Full Text Available Vinte cultivares de aveia (Avena sativa L. foram avaliados para rendimento de grãos nas safras agrícolas de 2001 e 2002 em nove locais dos estados do Paraná, Rio Grande do Sul e São Paulo, com o objetivo de avaliar as estimativas dos componentes de adaptabilidade e estabilidade do rendimento de grãos em ambientes favoráveis e desfavoráveis em presença e ausência de aplicação de fungicida. Foi empregada a metodologia de EBERHART & RUSSELL (1966. A presença de significância para anos, genótipos, fungicidas e locais, indicou comportamento diferencial de genótipos frente às variações de ambiente e a aplicação de fungicida, nas condições de ambientes favoráveis e desfavoráveis. A aplicação de fungicida e o favorecimento do ambiente de cultivo afetaram intensamente os parâmetros de adaptabilidade (b1 e estabilidade (s²d i, indicando que estas estimativas devam ser realizadas em ambientes estratificados, apesar de nenhuma constituição genética ter evidenciado o biótipo ideal, conforme preconizado pelo modelo adotado.

  11. EM Algorithm and Stochastic Control in Economics

    OpenAIRE

    Kou, Steven; Peng, Xianhua; Xu, Xingbo

    2016-01-01

    Generalising the idea of the classical EM algorithm that is widely used for computing maximum likelihood estimates, we propose an EM-Control (EM-C) algorithm for solving multi-period finite time horizon stochastic control problems. The new algorithm sequentially updates the control policies in each time period using Monte Carlo simulation in a forward-backward manner; in other words, the algorithm goes forward in simulation and backward in optimization in each iteration. Similar to the EM alg...

  12. Evaluation of Antioxidant Activities of Aqueous Extracts and Fractionation of Different Parts of <em>Elsholtzia em>ciliata>

    Directory of Open Access Journals (Sweden)

    Yuangang Zu

    2012-05-01

    Full Text Available The aim of this study was to investigate the antioxidant and free-radical scavenging activity of extract and fractions from various parts of <em>Elsholtzia ciliataem>. The inflorescences, leaves, stems and roots of <em>E. ciliataem> were extracted separately and two phenolic component enrichment methods: ethyl acetate-water liquid-liquid extraction and macroporous resin adsorption-desorption, were adopted in this study. The antioxidant activities of water extracts and fractions of <em>E. ciliataem> were examined using different assay model systems <em>in vitroem>. The fraction root E (purified by HPD300 macroporous resin exhibited the highest total phenolics content (497.2 ± 24.9 mg GAE/g, accompanied with the highest antioxidant activity against various antioxidant systems <em>in vitroem> compared to other fractions. On the basis of the results obtained, <em>E. ciliataem> extracts can be used potentially as a ready accessible and valuable bioactive source of natural antioxidants.

  13. A Novel Apoptosis Correlated Molecule: Expression and Characterization of Protein Latcripin-1 from <em>Lentinula em>edodes> C91–3

    Directory of Open Access Journals (Sweden)

    Min Huang

    2012-05-01

    Full Text Available An apoptosis correlated molecule—protein Latcripin-1 of <em>Lentinula> edodesem> C91-3—was expressed and characterized in <em>Pichia pastorisem> GS115. The total RNA was obtained from <em>Lentinula edodesem> C91–3. According to the transcriptome, the full-length gene of Latcripin-1 was isolated with 3'-Full Rapid Amplification of cDNA Ends (RACE and 5'-Full RACE methods. The full-length gene was inserted into the secretory expression vector pPIC9K. The protein Latcripin-1 was expressed in <em>Pichia pastorisem> GS115 and analyzed by Sodium Dodecylsulfonate Polyacrylate Gel Electrophoresis (SDS-PAGE and Western blot. The Western blot showed that the protein was expressed successfully. The biological function of protein Latcripin-1 on A549 cells was studied with flow cytometry and the 3-(4,5-Dimethylthiazol-2-yl-2,5-Diphenyl-tetrazolium Bromide (MTT method. The toxic effect of protein Latcripin-1 was detected with the MTT method by co-culturing the characterized protein with chick embryo fibroblasts. The MTT assay results showed that there was a great difference between protein Latcripin-1 groups and the control group (<em>p em>< 0.05. There was no toxic effect of the characterized protein on chick embryo fibroblasts. The flow cytometry showed that there was a significant difference between the protein groups of interest and the control group according to apoptosis function (<em>p em>< 0.05. At the same time, cell ultrastructure observed by transmission electron microscopy supported the results of flow cytometry. The work demonstrates that protein Latcripin-1 can induce apoptosis of human lung cancer cells A549 and brings new insights into and advantages to finding anti-tumor proteins.

  14. Low Diversity Bacterial Community and the Trapping Activity of Metabolites from Cultivable Bacteria Species in the Female Reproductive System of the Oriental Fruit Fly, <em>Bactrocera dorsalisem> Hendel (Diptera: Tephritidae

    Directory of Open Access Journals (Sweden)

    Hongyu Zhang

    2012-05-01

    Full Text Available Our goal was to identify the bacteria inhabiting the reproductive system of the female oriental fruit fly, <em>Bactrocera dorsalisem> (Hendel, and evaluate the chemotaxis of <em>B>. <em>dorsalis> to the metabolites produced by the bacteria. Based on 16S rRNA-based polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE, 18 operational taxonomic units (OTUs were assigned to the five bacterial classes <em>Betaproteobacteria>, <em>Alphaproteobacteria>, <em>Gammaproteobacteria>, <em>Bacilli> and <em>Actinobacteria>. Nine OTUs were assigned to <em>Gammaproteobacteria>, which was the most highly represented class. <em>Enterobacteriaceae> constituted the dominant family, and within this family, three genera and five species were identified, including <em>Enterobacter sakazakiiem>, <em>Klebsiella> <em>oxytoca>, <em>Klebsiella> <em>pneumoniae,> Raoultellaem> <em>terrigena em>and <em>Enterobacter> <em>amnigenus>. In this set, the first two species were the dominant components, and the latter three species were the minor ones. Finally, we found that the metabolites produced by <em>R.> terrigenaem>, <em>K. oxytocaem> and <em>K.> pneumoniae em>were attractive to the <em>B.> dorsalisem> adults, and in field studies, <em>B.> dorsalisem> adults were most attracted to <em>K.> oxytocaem>. Collectively, our results suggest that the female reproductive system plays an important role in the transfer of enterobacteria from the gut to fruit. Our data may prompt the development of a female-targeted population control strategy for this fly.

  15. Rodent hosts of <em>Maritrema> sp. (Digenea, Microphallidae in Sardinia Island

    Directory of Open Access Journals (Sweden)

    Juan Carlos Casanova

    2003-10-01

    Full Text Available Prospections on helminth fauna of rodents were carried out in the Cedrino river (Eastern of Sardinia island. Twelve <em>Rattus rattusem> (L., 1758 and eight <em>Mus domesticusem> (Schwarz & Schwarz, 1943 were captured by Sherman traps. Parasitological study revealed in <em>R. rattusem> the presence of an intestinal helminth belonging to the genus <em>Maritrema> (family Microphallidae. The transmission of this Digenetic Trematode among vertebrates involves the participation of aquatic invertebrate organisms, molluscs and crustacea, acting as intermediate hosts. Dissection of 117 individuals of the Amphipod Crustacea <em>Gammarus italicusem>, collected in the same biotope, allowed the detection of encysted metacercariae. These larvae constitute the infesting stage of the parasite for vertebrates, acting these as definitive hosts ingesting parasitized crustacea as preys. Adults of <em>Maritrema> sp. were also obtained experimentally in the laboratory mice (<em>Mus domesticusem> CD1 strain. These were infested by inoculating them, using gastric probe, metacercarial cysts isolated from <em>G. italicusem>. Post-infection mice dissection was performed at different intervals of time getting adults in various maturity stages. Experimental facts confirm that <em>Maritrema> sp., as it occurs in other trematodes, do not present strict specificity to the definitive host, being able to develop as well in <em>Mus>. In nature, the presence or absence of this digenean in mammals species will be dependent of host ethological factors, mainly related to feeding habitats. This study was partially supported by the ?Comissionat per Recerca i Universitats de la Generalitat de Catalunya? 2001SGR00088.

  16. Antifungal Activity, Toxicity and Chemical Composition of the Essential Oil of <em>Coriandrum sativumem> L. Fruits

    Directory of Open Access Journals (Sweden)

    Erika H. S. Brito

    2012-07-01

    Full Text Available The aims of this study were to test the antifungal activity, toxicity and chemical composition of essential oil from <em>C. sativumem> L. fruits. The essential oil, obtained by hydro-distillation, was analyzed by gas chromatography/mass spectroscopy. Linalool was the main constituent (58.22%. The oil was considered bioactive, showing an LC50 value of 23 µg/mL in the <em>Artemia salinaem> lethality test. The antifungal activity was evaluated against <em>Microsporum canisem> and <em>Candida> spp. by the agar-well diffusion method and the minimum inhibitory concentration (MIC and the minimum fungicidal concentration (MFC were established by the broth microdilution method. The essential oil induced growth inhibition zones of 28 ± 5.42 and 9.25 ± 0.5 for <em>M. canisem> and <em>Candida> spp. respectively. The MICs and MFCs for <em>M. canisem> strains ranged from 78 to 620 and 150 to 1,250 µg/mL, and the MICs and MFCs for <em>Candida> spp strains ranged from 310 to 620 and 620 to 1,250 µg/mL, respectively. <em>C. sativumem> essential oil is active<em> in vitroem> against <em>M. canis em>and> Candidaem> spp. demonstrating good antifungal activity.

  17. Bens virtuais em social games

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    Rebeca Recuero Rebs

    Full Text Available O artigo foca a compreensão dos significados da aquisição de bens virtuais por usuários de social games. Conjuntamente, busca estimular a reflexão sobre os usos e as identificações que motivam os jogadores à compra destes bens. Com base em autores que trabalham com a produção e as simbologias de bens integrados às práticas de consumo da sociedade, o trabalho apresenta dados de uma observação participante por sete meses em dez social games e de questionários aplicados em 140 jogadores. Por fim, propõe-se uma classificação de bens virtuais em social games baseada nos dados adquiridos e na dinâmica social do jogo. Os resultados apontam para a circulação de significações atribuídas aos bens virtuais a partir de contextos pré-estabelecidos pelos social games e pelas origens culturais de seus jogadores, atuando possivelmente na edificação e/ou manifestação identitária dos sujeitos no ciberespaço.

  18. Allometric and Isometric variations in the Italian <em>Apodemus sylvaticusem> and <em>Apodemus flavicollisem> with respect to the conditions of allopatry and sympatry / Variazioni allometriche e isometriche in <em>Apodemus sylvaticusem> e <em>Apodemus flavicollisem> italiani, rispetto alle condizioni di allopatria e simpatria

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    Giovanni Amori

    1986-12-01

    Full Text Available Abstract In Italy there are two species of <em>Apodemus> (<em>Sylvaemus>: <em>Apodemus sylvaticusem> on the mainland and the main island, and <em>Apodemus flavicollisem> only on the mainland. The trend of some morphometric characters of the skull (incisive foramen length - FI; interorbital breadth = IO; length of palatal bridge = PP; upper alveolar length = $M^1M^3$ was analized and some theoretical models verified for <em>A. sylvaticusem>. If one considers the sympatric population of <em>A. sylvaticusem> and <em>A. flavicollisem> simultaneously the characters PP, IO and $M^1M^3$ appear significantly isometric being directly correlated ($P leq O.O1$, while FI character results allometric with respect to the previous ones, as expected. If one considers the sympatric populations of each of the species separately, the scenario is different. For <em>A. sylvaticusem> only PP and $M^1M^3$ are isometric ($P leq 0.05$. For <em>A. flavicollisem> only $M^1M^3$ and FI appear to be correlated, although not as significantly as for <em>A. sylvaticusem> ($P le 0.05$; one tail. The insular populations of <em>A. sylvaticusem> do not show significant correlations, except for FI and $M^1M^3$ ($P le 0.05$. On the contrary, considering all populations, sympatric and allopatric, of <em>A. sylvaticusem> at the same time are significant correlations ($P le 0.05$ in all combinations of characters, except for those involving the IO. We suggest that the isometric relations in sympatric assemblages are confined within a morphological range available to the genus <em>Apodemus>. In such a space, the two species are split in two different and innerly homogeneous distributions. We found no evidence to confirm the niche variation hypothesis. On the contrary, the variability expressed as SO or CV's appears higher in the sympatric populations than in the allopatric ones, for three of the four characters, confirming previous results

  19. First sign of <em>Clethrionomys glareolusem> in the Po valley plain / Prima segnalazione in Pianura Padana di <em>Clethrionomys glareolusem>

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    Luis Nieder

    1987-07-01

    Full Text Available Abstract The presence of <em>Clethrionomys glareolusem> (Schreber, 1790 populations is reported in the Po valley, formerly considered outside the distribution area of the species. An initial series of captures was made in the high-water area of the Po near S. Nazzaro (Monticelli d'Ongina - PC following with research was extended along the river's banks in Emilia both upstream and downstream. The search for this species was carried out by analysing food pellets relating to <em>Strix alucoem>, <em>Tyto albaem> e <em>Athene noctuaem>, thought to be among the most common predators of these intensive herbaceous and arboreal agricultural biocoenosis. The information we gathered was integrated with other Authors' unpublished and bibliographical data. The presence of <em>C. glareolusem> was noted in habitats quite different from the expected ones. Many of the problems raised by the presence of this species in "islands" along the main body of the Po river and its tributaries, and by its presumed absence from particulary suitable environments such as the Carrega woods, the Ticino park and Mesola wood must still be resolved. Riassunto Viene segnalata la presenza di popolazioni di <em>Clethrionomys glareolusem> (Schreber 1790 nella pianura Padana precedentemente considerata al di fuori dell'areale della specie. A partire da una prima serie di catture nell'area golenale del Po presso S. Nazzaro (Monticelli d'Ongina - PC, si è successivamente proceduto ad allargare l'area di ricerca lungo l'argine emiliano del Po, sia a monte sia a valle. La ricerca di questa specie è avvenuta tramite l'analisi di boli alimentari relativi a <em>Strix alucoem>, <em>Tyto albaem> e <em>Athene noctuaem>, ritenuti tra i più comuni predatori di queste biocenosi agricole intensive erbacee ed arboree. I dati da noi raccolti sono stati integrati con quelli bibliografici e inediti di altri Autori. È stata riscontrata la presenza

  20. Parasitic zoonoses: survey in foxes (<em>Vulpes vulpesem> in the northern Apennines / Zoonosi parassitarie: indagini in volpi (<em>Vulpes vulpesem> dell'Appennino settentrionale

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    Vittorio Guberti

    1991-07-01

    Full Text Available Abstract A parasitological survey on 153 foxes was carried out in the northern Apennines, during the period 1984-1987. The following parasites were identified: <em>Toxocara canisem> (46.4%, <em>Taenia> sp. (17%, <em>Uncinaria stenocephalaem> (11.8%, <em>Mesocestoides lineatusem> (11.1%, <em>Ancylostoma caninumem> (3.9%, <em>Taenia hydatigenaem> (3.3%, <em>Trichuris vulpisem> (3.3%, <em>Dipylidium caninumem> (2.6%, <em>Taenia crassicepsem> (2%. All foxes were negative for <em>Trichinella> sp. A statistical analysis was performed to evaluate differences in the parasitic fauna according to the sex and age classes of the hosts. The role that the fox could have as a reservoir of helminthic zoonoses is discussed. The results are compared with those of similar studies carried out in Italy. Riassunto Nel periodo 1984-1987 è stata condotta un'indagine parassitologica su 153 volpi abbattute nell'Appennino romagnolo. Sono stati reperiti i seguenti parassiti: <em>Toxocara canisem> (46,4%, <em>Taenia> sp. (17%, <em>Uncinaria stenocephalaem> (11,8%, <em>Mesocestoides lineatusem> (11,1%, <em>Ancylostoma caninumem> (3,9%, <em>Taenia hydatigenaem> (3,3%, <em>Trichuris vulpisem> (3,3%, <em>Dipylidium caninumem> (2,6%, <em>Taenia crassicepsem> (2%. Tutte le volpi esaminate sono risultate negative per <em>Trichinella> sp. È stata effettuata l'analisi statistica dei dati per evidenziare eventuali differenze della fauna parassitaria in relazione al sesso e all'età delle volpi. Sulla base dei dati ottenuti viene discussa l'importanza che la Volpe può assumere come serbatoio di zoonosi elmintiche. I risultati acquisiti sono inoltre comparati con quelli ottenuti in analoghe ricerche condotte in Italia.

  1. Cefaleia em salvas: aspectos clinicos e terapeuticos em 26 casos

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    Wilson Luiz Sanvito

    1980-12-01

    Full Text Available Vinte e seis casos de cefaléia-em-salvas são estudados do ponto de vista clínico e terapêutico. Nos aspectos clínicos são ressaltados a dramaticidade deste tipo de cefaléia, o nítido predomínio no sexo masculino, a média de idade dos pacientes, a presença de manifestações associadas e os fatores desencadeantes das crises nos períodos suscetíveis. Do ponto de vista terapêutico três esquemas medicamentosos foram utilizados: maleato de metisergida, prednisona e associação de ambas as drogas. Em 88,3% dos casos um resultado significativo foi alcançado, traduzido por melhora ou abolição das crises.

  2. DOI: 10.4025/actascibiolsci.v33i3.8011 Acta Scientiarum. Biological Sciences Maringá, v. 33, n. 3, p. 239-246, 2011 Acute inflammatory response in Nile tilapia fed probiotic Lactobacillus plantarum in the diet = Resposta inflamatória aguda em tilápia do Nilo alimentada com probiótico, Lactobacillus plantarum na dieta

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    Geovana Dotta

    2011-07-01

    alimentacao foi injetado carragenina ou salina. Apos 6h, realizou-se a coleta de exsudato e sangue para determinacao do hematocrito, contagens totais de eritrocitos, leucocitos, contagem diferencial de leucocitos e atividade fagocitaria no sangue. A suplementacao com probiotico na racao nao influenciou o numero total de eritrocitos, o hematocrito e os numeros de linfocitos e basofilos no sangue dos animais. O numero de neutrofilos foi maior nos peixes suplementados com probiotico einjetados com carragenina. A glicose nos peixes suplementados com probiotico nao-injetados foi maior do que nos injetados com salina. A suplementacao com probiotico potencializou a migracao de celulas para o foco inflamatorio nos injetados com o flogogeno carragenina. Empeixes injetados com salina e carragenina, ocorreu maior atividade fagocitaria no sangue em relacao aos demais tratamentos.

  3. Fatores de risco cardiovascular em alcoolistas em tratamento

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    Mayla Cardoso Fernandes Toffolo

    2013-06-01

    Full Text Available OBJETIVO: Avaliar a presença de fatores de risco cardiovascular, com ênfase na hipertensão e na adiposidade corporal, em alcoolistas abstinentes ou não abstinentes em tratamento. MÉTODO: Trata-se de um estudo transversal com 65 pacientes alcoolistas em tratamento no CAP-Sad. O grau de dependência do álcool foi avaliado pelo SADD (Short Alcohol Dependence Data e o uso de outras drogas, pelo ASSIST (Alcohol Smoking and Substance Involvement Screening Test. Foram avaliados o perfil bioquímico e o antropométrico dos usuários. RESULTADOS: Participaram do estudo 42 homens e 23 mulheres. A maioria dos participantes (67,74% apresentou dependência alcoólica grave, com uso de álcool associado principalmente a cigarro (66,15%. A média da circunferência da cintura (CC foi significativamente maior entre os abstinentes, em comparação aos não abstinentes (AB: 88,15 ± 15,95 x NA: 81,04 ± 9,86; p = 0,03. Pacientes abstinentes há mais tempo tiveram maior sobrepeso/obesidade e adiposidade abdominal (CC do que os não abstinentes e abstinentes recentes, com razão de chances de 5,25. Os abstinentes apresentaram razão de chances de 3,38 para %GC acima da média, independente do tempo de abstinência. CONCLUSÃO: Pacientes alcoolistas abstinentes apresentam mais sobrepeso/ obesidade, adiposidade corporal (%GC e abdominal (CC do que os não abstinentes. É importante o acompanhamento multiprofissional no tratamento de alcoolistas com abordagem para fatores de risco cardiovasculares, principalmente evitando o ganho de peso.

  4. Enfermagem em cardiologia baseada em evidência

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    Eneida Rejane Rabelo da Silva

    2007-10-01

    Full Text Available Neste artigo apresentamos, dentro do cenário cardiovascular, estudos recentes do nosso grupo. Buscando melhores evidências de enfermagem investigamos por meio de ensaios clínicos randomizados (ECR estratégias de educação e acompanhamento destes pacientes (pctes. O primeiro ECR avaliou o impacto da educação individual e da orientação em grupo no conhecimento sobre doença e autocuidado em pctes com insuficiência cardíaca (IC. No grupo intervenção, houve uma melhora do conhecimento dos cuidados essenciais (controle de sal e da ingesta hídrica, peso diário, realização de atividade física P=0,008, demonstrando que o atendimento em grupo é semelhante ao individual. No ambiente hospitalar, segundo ECR, comparamos o efeito da educação de enfermagem e seguimento telefônico após alta versus educação sem a monitorização por telefone. Demonstramos que intervenção educativa durante a internação melhora o conhecimento da doença, autocuidado e qualidade de vida (P

  5. Fadiga em idosos em tratamento quimioterápico

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    Thalyta Cristina Mansano-Schlosser

    2014-08-01

    Full Text Available Pesquisa com delineamento transversal, realizada de agosto a dezembro de 2010, que objetivou identificar a presença e intensidade da fadiga em 140 idosos (média de idade 69,8 anos, 52,1% do sexo feminino com diagnóstico de câncer, em tratamento quimioterápico ambulatorial. Utilizou-se um questionário para caracterização sociodemográfica e clínica e a Escala de Fadiga de Piper-revisada. Identificou-se a presença de fadiga em 60 idosos (42,9% e a causa atribuída foi o câncer (64,1%, a quimioterapia (32,8% e o tratamento (3,1%. Como fator de alívio, os idosos entrevistados relataram "dormir", "rezar" e "morrer", enquanto 45% deles disseram "não ter o que fazer", pois a fadiga não poderia ser aliviada. Espera-se que este estudo alerte os profissionais de enfermagem para a relevância da fadiga e os estimule a identificar e realizar intervenções de enfermagem que visem o adequado manejo desse sintoma no paciente idoso oncológico.

  6. <em>Ipomoea aquaticaem> Extract Shows Protective Action Against Thioacetamide-Induced Hepatotoxicity

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    A. Hamid A. Hadi

    2012-05-01

    Full Text Available In the Indian system of traditional medicine (Ayurveda it is recommended to consume <em>Ipomoea em>aquatica> to mitigate disorders like jaundice. In this study, the protective effects of ethanol extract of <em>I. aquaticaem> against liver damage were evaluated in thioacetamide (TAA-induced chronic hepatotoxicity in rats. There was no sign of toxicity in the acute toxicity study, in which Sprague-Dawley (SD rats were orally fed with <em>I. aquaticaem> (250 and 500 mg/kg for two months along with administration of TAA (i.p injection 200 mg/kg three times a week for two months. The results showed that the treatment of <em>I. aquaticaem> significantly lowered the TAA-induced serum levels of hepatic enzyme markers (ALP, ALT, AST, protein, albumin, bilirubin and prothrombin time. The hepatic content of activities and expressions SOD and CAT that were reduced by TAA were brought back to control levels by the plant extract supplement. Meanwhile, the rise in MDA level in the TAA receiving groups also were significantly reduced by <em>I. aquaticaem> treatment. Histopathology of hepatic tissues by H&E and Masson trichrome stains displayed that <em>I. aquaticaem> has reduced the incidence of liver lesions, including hepatic cells cloudy swelling, infiltration, hepatic necrosis, and fibrous connective tissue proliferation induced by TAA in rats. Therefore, the results of this study show that the protective effect of <em>I. aquaticaem> in TAA-induced liver damage might be contributed to its modulation on detoxification enzymes and its antioxidant and free radical scavenger effects. Moreover, it confirms a scientific basis for the traditional use of <em>I. aquaticaem> for the treatment of liver disorders.

  7. Synthesis and characterization of nanoparticles ferrites of the type ZN{sub x}Cu{sub 1-x}FE{sub 2}O{sub 4} and your application catalyst in acetylation vegetable oils; Sintese e caracterizacao de nanoparticulas de ferritas do tipo Zn{sub x}Cu{sub 1-x}Fe{sub 2}O{sub 4} e a sua aplicacao como catalisador em acetilacao em oleos vegetais

    Energy Technology Data Exchange (ETDEWEB)

    Casagrande, D.S; Costa, W.V; Hechenleitner, A.A.W.; Oliveira, D.M.F. de; Pineda, E.A.G., E-mail: diogo_casagrande@msn.com [Universidade Estadual de Maringa (UEM), PR (Brazil)

    2016-07-01

    In this work were synthesized copper and zinc ferrites (0 - 10% mol with respect to copper), by the combustion method, using citrate as stabilizer. The obtained products were analyzed by Infrared spectrometry (FTIR), Raman spectroscopy (RAMAN) and x-ray diffractometry (DRX). Synthesized ferrites present hematite phase, maghemite phase and copper ferrite phases. The analysis indicated that increasing the zinc content leads to decreased of hematite phase. Increasing of zinc content lead to an increase of particle size. The best results of oil acylation were obtained with ferrites containing 2 and 4% of zinc, wherein the increase the increase of yield of acetylated product reached at 19% when compared with the yield obtained whit copper ferrite without zinc. (author)

  8. Phytochemical Composition, Antioxidant and Xanthine Oxidase Inhibitory Activities of <em>Amaranthus cruentusem> L. and <em>Amaranthus hybridusem> L. Extracts

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    Jeanne F. Millogo

    2012-06-01

    Full Text Available This paper describes a preliminary assessment of the nutraceutical value of <em>Amaranthus cruentus (A. cruentusem> and <em>Amaranthus hybridus (A. hybridusem>, two food plant species found in Burkina Faso. Hydroacetonic (HAE, methanolic (ME, and aqueous extracts (AE from the aerial parts were screened for <em>in vitroem> antioxidant and xanthine oxidase inhibitory activities. Phytochemical analyses revealed the presence of polyphenols, tannins, flavonoids, steroids, terpenoids, saponins and betalains. Hydroacetonic extracts have shown the most diversity for secondary metabolites. The TLC analyses of flavonoids from HAE extracts showed the presence of rutin and other unidentified compounds. The phenolic compound contents of the HAE, ME and AE extracts were determined using the Folin–Ciocalteu method and ranged from 7.55 to 10.18 mg Gallic acid equivalent GAE/100 mg. Tannins, flavonoids, and flavonols ranged from 2.83 to 10.17 mg tannic acid equivalent (TAE/100 mg, 0.37 to 7.06 mg quercetin equivalent (QE /100 mg, and 0.09 to 1.31 mg QE/100 mg, respectively. The betacyanin contents were 40.42 and 6.35 mg Amaranthin Equivalent/100 g aerial parts (dry weight in <em>A. cruentusem> and <em>A. hybridusem>, respectively. Free-radical scavenging activity expressed as IC50 (DPPH method and iron reducing power (FRAP method ranged from 56 to 423 µg/mL and from 2.26 to 2.56 mmol AAE/g, respectively. Xanthine oxidase inhibitory activities of extracts of <em>A. cruentus em>and <em>A. hybridusem> were 3.18% and 38.22%, respectively.<em> em>The> A. hybridusem> extract showed the best antioxidant and xanthine oxidase inhibition activities. The results indicated that the phytochemical contents of the two species justify their traditional uses as nutraceutical food plants.

  9. Virtude e felicidade em Sêneca

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    José João Neves Barbosa Vicente

    2016-06-01

    Full Text Available Viver feliz é o que todos almejam, mas o caminho para a felicidade não parece estar claro para todos. Os ensinamentos de Sêneca nos apontam alguns caminhos, ainda que para o nosso tempo, são caminhos considerados de acesso difícil, pois Sêneca nos diz que, para sermos felizes, devemos dirigir nossos olhares sempre para as virtudes e nunca para o gozo dos prazeres, estes nos escravizam, enquanto aquelas nos libertam. Portanto, o propósito deste texto é refletir, ainda que seja em termos introdutórios, sobre a felicidade em Sêneca que pode ser entendido a partir de uma relação com a virtude; ou seja, para ele, não é possível ser feliz se deixarmos de buscar ou viver nas virtudes.

  10. Governo e Poder em Foucault

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    Monica Loyola Stival

    Full Text Available RESUMO: O presente artigo mostra que o conceito de "governo" de Michel Foucault ocupa o espaço aberto por sua crítica ao poder moderno. Foucault passa aos poucos do conceito de poder à noção de governo em suas análises. Porém, não se trata de substituição de conceitos equivalentes, mas de um refinamento conceitual que ilumina a dimensão da atividade dos sujeitos como base das relações sociais e políticas modernas. Assim, este texto tem dois momentos distintos e complementares: mostra a possibilidade de passar do conceito de poder ao conceito de governo, pelo menos como elemento central da análise social e política, e discute o alcance do conceito de governo, que se instala em uma dimensão diferente daquela do poder.

  11. Sinais em neurorradiologia: parte 1

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    Fabrício Guimarães Gonçalves

    2011-04-01

    Full Text Available O uso de sinais ou analogias na interpretação de imagens na radiologia médica é prática comum e antiga entre os radiologistas. Comparação entre achados de imagem com animais, alimentos ou objetos se faz de modo natural. Muitos sinais são bastante específicos e em alguns casos patognomônicos. Independentemente do grau de especificidade, sinais auxiliam a prática radiológica. Vários sinais já foram descritos em neurorradiologia. Neste artigo os autores demonstrarão 15 sinais neurorradiológicos. Serão abordados as principais características de cada um, a sua importância na prática clínica e os seus achados de imagem.

  12. Paratuberculose em ruminantes no Brasil

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    Yamasaki,Elise M.; Brito,Marilene F.; Mota,Rinaldo A.; McIntosh,Douglas; Tokarnia,Carlos H.

    2013-01-01

    A paratuberculose ou doença de Johne é uma enterite granulomatosa causada por Mycobacterium avium subsp. paratuberculosis (Map) e comumente afeta ruminantes domésticos, no entanto, pode infectar várias espécies de mamíferos. Está presente nos cinco continentes e é considerada endêmica em algumas regiões pela Organização Internacional de Epizootias (OIE). Pertence à lista de enfermidades notificáveis, que compreende as doenças transmissíveis de importância sócio-econômica e/ou em saúde-pública...

  13. Culturas orais em sociedades letradas

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    Geraldi João Wanderley

    2000-01-01

    Full Text Available Na relação entre linguagem e cultura, um aspecto essencial diz respeito às diferentes funções da escrita e às formas de sua apropriação social em sociedades letradas. Tomando como inspiração a forma de um uso específico da escrita pelo povo indígena Jarawara e narrativas de ribeirinhos do rio Madeira do mito amazônico Cobra Norato, são discutidas as diferentes relações entre oralidade e escrita que, atravessadas pelas relações de poder, transformam o alfabeto, de artefato histórico construído para o registro da oralidade, em espaço social de construção de distinções, clivagens e exclusões.

  14. Bacharelado em psicopedagogia = Psycopedagogy Course

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    Ramos, Maria Beatriz Jacques

    2007-01-01

    Full Text Available Este texto mostra a história da implantação do Curso de Bacharelado em Psicopedagogia na FACED, PUCRS. Neste texto são apresentados os referenciais teóricos e dados sobre a atuação do psicopedagogo nos campos preventivo e terapêutico explicitando a relevância da formação de profissionais nesta área

  15. Iatrogenia em pacientes idosos hospitalizados

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    Carvalho-Filho Eurico T.

    1998-01-01

    Full Text Available Analisar as complicações iatrogênicas apresentadas por idosos hospitalizados. Estudo retrospectivo dos prontuários de 96 pacientes, 48 do sexo masculino e 48 do feminino, com idades variando de 60 a 93 anos (média: 75,7 anos, hospitalizados durante o ano de 1995 em enfermaria geriátrica. A análise da evolução dos pacientes durante o período de hospitalização permitiu evidenciar: 1 em 42 (43,7% pacientes ocorreram uma ou mais complicações iatrogênicas, num total de 56 episódios; 2 manifestações relacionadas aos procedimentos diagnósticos corresponderam a 17,9% das iatrogenias; 3 alterações relacionadas às medidas terapêuticas corresponderam a 58,9%, sendo 32,1% referentes à terapêutica farmacológica e 26,8% a outros procedimentos terapêuticos; 4 manifestações iatrogênicas não relacionadas diretamente às afecções (úlceras de decúbito, quedas e fraturas corresponderam a 23,2%; 5 a presença de manifestações iatrogênicas correlacionou-se com período mais prolongado de internação; 6 cinco pacientes faleceram em conseqüência direta de complicações iatrogênicas. A iatrogenia é freqüente em pacientes idosos hospitalizados, podendo determinar manifestações graves e mesmo fatais. Como uma significativa proporção dessas complicações pode ser evitada através de medidas adequadas, deve-se procurar identificar suas causas e desenvolver métodos para previni-la ou reduzir seus efeitos.

  16. COMPETÊNCIA EM MEDICINA

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    Hélio Teixeira MD.

    2005-01-01

    Full Text Available Competência no exercício da medicina depende de um processo evolutivo ao longo da vida do profissional, processo este fundamentado em eficiência, experiência e em princípios éticos. A eficiência depende da cultura médica, de habilidades técnicas e relacionamento interpessoal com o paciente. A experiência ao longo da vida vai refinando o médico, favorecendo o evolver do conhecimento e da sabedoria vivencial. Finalmente, a ética médica se fundamenta na justiça, compaixão e amor ao próximo. Didaticamente, distinguimos 3 fases da evolução profissional do médico: a infância profissional ou visão linear: o médico se restringe em geral ao atendimento da doença, negligenciando o doente. É quase exclusivamente técnico e tem percepção acanhada da medicina-arte. b Maturidade profissional ou visão humanística: resultado de evolução da personalidade, da cultura e da experiência do médico, agora voltado para o doente com sua doença. c Excelência profissional ou visão holística: estágio máximo que se pode alcançar, quando o médico vislumbra a si e ao seu cliente em todas suas dimensões integradas e atua como mestre, procurando despertar no paciente condições próprias de cura, oriundas de sua essência. Conclui-se que exercer medicina com competência significa desempenhar adequadamente a ciência e a arte médica.

  17. Iatrogenia em pacientes idosos hospitalizados

    Directory of Open Access Journals (Sweden)

    Eurico T. Carvalho-Filho

    1998-02-01

    Full Text Available Analisar as complicações iatrogênicas apresentadas por idosos hospitalizados. Estudo retrospectivo dos prontuários de 96 pacientes, 48 do sexo masculino e 48 do feminino, com idades variando de 60 a 93 anos (média: 75,7 anos, hospitalizados durante o ano de 1995 em enfermaria geriátrica. A análise da evolução dos pacientes durante o período de hospitalização permitiu evidenciar: 1 em 42 (43,7% pacientes ocorreram uma ou mais complicações iatrogênicas, num total de 56 episódios; 2 manifestações relacionadas aos procedimentos diagnósticos corresponderam a 17,9% das iatrogenias; 3 alterações relacionadas às medidas terapêuticas corresponderam a 58,9%, sendo 32,1% referentes à terapêutica farmacológica e 26,8% a outros procedimentos terapêuticos; 4 manifestações iatrogênicas não relacionadas diretamente às afecções (úlceras de decúbito, quedas e fraturas corresponderam a 23,2%; 5 a presença de manifestações iatrogênicas correlacionou-se com período mais prolongado de internação; 6 cinco pacientes faleceram em conseqüência direta de complicações iatrogênicas. A iatrogenia é freqüente em pacientes idosos hospitalizados, podendo determinar manifestações graves e mesmo fatais. Como uma significativa proporção dessas complicações pode ser evitada através de medidas adequadas, deve-se procurar identificar suas causas e desenvolver métodos para previni-la ou reduzir seus efeitos.

  18. Complaints against an EMS system.

    Science.gov (United States)

    Colwell, Christopher B; Pons, Peter T; Pi, Randy

    2003-11-01

    Complaints against Emergency Medical Services (EMS) agencies represent a concerning and potentially time-consuming problem for all involved in the delivery of prehospital emergency medical care. The objective of this study was to identify the source of complaints against an EMS system to help focus quality and performance improvement and customer service efforts. We conducted a retrospective review of complaints filed against a busy urban EMS agency over a 6-year period. All complaints were included, totaled by season and by year, and categorized by originator and nature of the complaint. A total of 286 complaints were registered during the 6-year period, with an average of 48 per year and 9.3 per 10,000 responses. The most common originators of complaints were patients (53%) followed by medical personnel (19%) and family members or friends (12%). Rude behavior accounted for 23% of the complaints registered, followed by technical skills (20%), transport problems (18%), and loss of belongings (13%). The identification of areas of dissatisfaction will allow focused quality and performance improvement programs directed at customer service and risk management.

  19. Existe sujeito em Michel Maffesoli?

    Directory of Open Access Journals (Sweden)

    Marli Appel da Silva

    2010-06-01

    Full Text Available Este ensaio discute a concepção de sujeito na abordagem teórica de Michel Maffesoli. As ideias desse autor estão em voga em alguns meios acadêmicos no Brasil e são difundidas por algumas mídias de grande circulação nacional. Entretanto, ao longo de suas obras, os pressupostos que definem quem é o sujeito maffesoliano se encontram pouco clarificados. Portanto, para alcançar o objetivo a que se propõe, este ensaio desenvolve uma análise da epistemologia e da ontologia maffesoliana com a finalidade de compreender as origens dos pressupostos desse autor, ou seja, as teorias e os autores em que Maffesoli se baseou para desenvolver uma visão de sujeito. Com essa compreensão, pretende-se responder à questão: existe sujeito na abordagem teórica de Maffesoli.

  20. Adding large EM stack support

    KAUST Repository

    Holst, Glendon

    2016-12-01

    Serial section electron microscopy (SSEM) image stacks generated using high throughput microscopy techniques are an integral tool for investigating brain connectivity and cell morphology. FIB or 3View scanning electron microscopes easily generate gigabytes of data. In order to produce analyzable 3D dataset from the imaged volumes, efficient and reliable image segmentation is crucial. Classical manual approaches to segmentation are time consuming and labour intensive. Semiautomatic seeded watershed segmentation algorithms, such as those implemented by ilastik image processing software, are a very powerful alternative, substantially speeding up segmentation times. We have used ilastik effectively for small EM stacks – on a laptop, no less; however, ilastik was unable to carve the large EM stacks we needed to segment because its memory requirements grew too large – even for the biggest workstations we had available. For this reason, we refactored the carving module of ilastik to scale it up to large EM stacks on large workstations, and tested its efficiency. We modified the carving module, building on existing blockwise processing functionality to process data in manageable chunks that can fit within RAM (main memory). We review this refactoring work, highlighting the software architecture, design choices, modifications, and issues encountered.

  1. Paratuberculose em ruminantes no Brasil

    Directory of Open Access Journals (Sweden)

    Elise M. Yamasaki

    2013-02-01

    Full Text Available A paratuberculose ou doença de Johne é uma enterite granulomatosa causada por Mycobacterium avium subsp. paratuberculosis (Map e comumente afeta ruminantes domésticos, no entanto, pode infectar várias espécies de mamíferos. Está presente nos cinco continentes e é considerada endêmica em algumas regiões pela Organização Internacional de Epizootias (OIE. Pertence à lista de enfermidades notificáveis, que compreende as doenças transmissíveis de importância sócio-econômica e/ou em saúde-pública, cujo controle é necessário para o comércio internacional de animais e alimentos de origem animal. A importância da doença de Johne não se restringe somente aos prejuízos econômicos causados à indústria animal, mas também na possível participação do Map na íleocolite granulomatosa que afeta seres humanos, conhecida como doença de Crohn. No Brasil, a paratuberculose já foi descrita em diversas espécies de ruminantes e em vários estados. Embora os relatos naturais da enfermidade sejam pontuais, acredita-se na possibilidade da transmissão interespecífica e na disseminação do agente através da compra e venda de animais infectados. O objetivo deste artigo foi reunir as informações disponíveis referentes aos aspectos epidemiológicos, clínico-patológicos e laboratoriais da paratuberculose em bovinos, bubalinos, caprinos e ovinos no Brasil, e salientar a necessidade de implementação de medidas de controle sanitário da enfermidade no país, o que possibilitaria a melhoria da qualidade e valorização dos produtos de origem animal no mercado internacional.

  2. Ultrasound-Assisted Extraction of Carnosic Acid and Rosmarinic Acid Using Ionic Liquid Solution from <em>Rosmarinus officinalisem>>

    Directory of Open Access Journals (Sweden)

    Chunjian Zhao

    2012-09-01

    Full Text Available Ionic liquid based, ultrasound-assisted extraction was successfully applied to the extraction of phenolcarboxylic acids, carnosic acid and rosmarinic acid, from <em>Rosmarinus officinalisem>. Eight ionic liquids, with different cations and anions, were investigated in this work and [C8mim]Br was selected as the optimal solvent. Ultrasound extraction parameters, including soaking time, solid–liquid ratio, ultrasound power and time, and the number of extraction cycles, were discussed by single factor experiments and the main influence factors were optimized by response surface methodology. The proposed approach was demonstrated as having higher efficiency, shorter extraction time and as a new alternative for the extraction of carnosic acid and rosmarinic acid from <em>R. officinalisem>> em>compared with traditional reference extraction methods. Ionic liquids are considered to be green solvents, in the ultrasound-assisted extraction of key chemicals from medicinal plants, and show great potential.

  3. Trophic systems and chorology: data from shrews, moles and voles of Italy preyed by the barn owl / Sistemi trofici e corologia: dati su <em>Soricidae>, <em>Talpidae> ed <em>Arvicolidae> d'Italia predati da <em>Tyto albaem> (Scopoli 1769

    Directory of Open Access Journals (Sweden)

    Longino Contoli

    1986-12-01

    Full Text Available Abstract In small Mammals biogeography, available data are up to now by far too scanty for elucidate the distribution of a lot of taxa, especially with regard to the absence from a given area. In this respect, standardized quantitative sampling techniques, like Owl pellets analysis can enable not only to enhance faunistic knowledges, but also to estimate the actual absence probability of a given taxon "m", lacking from the diet of an individual raptor. For the last purpose, the relevant frequencies of "m" in the other ecologically similar sites of the same raptor species diets are averaged ($f_m$ : the relevant standard error (multiplicated by a coefficient, according to the desired degree of accuracy, in relation of the integral of probabilities subtracted ($overline{F}_m - a E$: then, the probability that a single specimen is not pertaining to "m" is obtained ($P_0 = 1 - F_m + a E$; lastly, the desiderate accuracy probability ($P_d$ is chosen. Now, "$N_d$" (the number of individuals of all prey species in a single site needed for obtain, with the desired probability, a specimen at least of "m" is obtained through $$N = frac{ln P_d}{ln P_0}$$ Obviously, every site-diet with more than "N" preyed individuals and without any "i" specimen is considered to be lacking of such taxon. A "usefulness index" for the above purposes is outlined and checked about three raptors. Some exanples about usefulness of the Owl pellet analysis method in biogeography are given, concerning <em>Tyto albaem> diets in peninsular Italy about: - <em>Sorex minutusem>, lacking in some quite insulated areas; - <em>Sorex araneusem> (sensu stricto, after GRAF et al., 1979, present also in lowland areas in Emilia-Romagna; - <em>Crocidura suaveolensem> and - <em>Suncus etruscusem>, present also in the southermost part of Calabria (Reggio province; - <em>Talpa caecaem>, present also in the Antiapennines of Latium (Cimini mounts; - <em>Talpa romanaem

  4. Bioactive Compounds from a Gorgonian Coral <em>Echinomuricea> sp. (Plexauridae

    Directory of Open Access Journals (Sweden)

    Jih-Jung Chen

    2012-05-01

    Full Text Available A new labdane-type diterpenoid, echinolabdane A (1, and a new sterol, 6-<em>epi>-yonarasterol B (2, were isolated from a gorgonian coral identified as <em>Echinomuricea> sp. The structures of metabolites 1 and 2 were elucidated by spectroscopic methods. Echinolabdane A (1 possesses a novel tetracyclic skeleton with an oxepane ring jointed to an α,β-unsaturated-γ-lactone ring by a hemiketal moiety, and this compound is the first labdane-type diterpenoid to be obtained from marine organisms belonging to the phylum Cnidaria. 6-<em>epi>-Yonarasterol B (2 is the first steroid derivative to be isolated from gorgonian coral belonging to the genus <em>Echinomuricea>, and this compound displayed significant inhibitory effects on the generation of superoxide anions and the release of elastase by human neutrophils.

  5. Bioactivities of the Genus <em>Combretum> (Combretaceae: A Review

    Directory of Open Access Journals (Sweden)

    Josean Fechine Tavares

    2012-08-01

    Full Text Available The Combretaceae is a large family of herbs, shrubs and trees, comprising about 20 genera and 600 species with tropical distribution around the globe and centers of diversity in Africa and Asia. Some <em>Combretum> species are extensively used in traditional medicine against inflammation, infections, diabetes, malaria, bleeding, diarrhea and digestive disorders and others as a diuretic. The present work is a literature survey of <em>Combretum> species that have been evaluated for their ability to exert biological activities. A total number of 36 <em>Combretum> species are discussed with regard to plant parts used, component tested and bioassay models. This review is of fundamental importance to promoting studies on <em>Combretum> species, thereby contributing to the development of new therapeutic alternatives that may improve the health of people suffering from various health problems.

  6. Alkaloids Isolated from the Lateral Root of <em>Aconitum carmichaeliiem>

    Directory of Open Access Journals (Sweden)

    Qin-Mei Zhou

    2012-08-01

    Full Text Available Two new alkaloids, aconicarmine (1 and aconicaramide (5, were isolated from the EtOH extract of the lateral roots of <em>Aconitum carmichaeliiem>, together with five known compounds: fuziline (2, neoline (3, <em>N>-ethylhokbusine B (4, 5-hydroxymethylpyrrole-2-carbaldehyde (6, and oleracein E (7. Their structures were elucidated by physical and NMR analysis. Pyrrole alkaloids were isolated from <em>A. carmichaeliiem> for the first time. In the <em>in vitroem> assays, compounds 2 and 3 showed activity against pentobarbital sodium-induced cardiomyocytes damage by obviously recovering beating rhythm and increasing the cell viability, while compounds 5 and 7 showed moderate antibacterial activity.

  7. Morphological identification of the Soprano Pipistrelle (<em>Pipistrellus pygmaeusem> Leach, 1825 in Croatia.

    Directory of Open Access Journals (Sweden)

    Igor Pavlinić

    2008-07-01

    Full Text Available Abstract After the discovery of two different phonic types within the common pipistrelle (<em>Pipistrellus pipistrellusem>, mtDNA analysis confirmed the existence of two separate species named as common pipistrelle (<em>P. pipistrellusem> and soprano pipistrelle (<em>P. pygmaeusem>. The discrimination of these two cryptic species using external characters and measures has proved to be somewhat problematic. We examined two colonies of soprano pipistrelle from Donji Miholjac, Croatia. As a result, only two characters proved to be of help for field identification: wing venation (89% of cases and penis morphology and colour for males. The difference in length between the 2nd and 3rd phalanxes of the 3rd finger should be discarded as diagnostic trait between <em>P. pipistrellusem> and <em>P. pygmaeusem> in Croatia. Riassunto Identificazione su basi morfologiche del pipistrello pigmeo (<em>Pipistrellus pygmeausem>, Leach, 1825 in Croazia. A seguito della descrizione di due differenti "tipi fonici" nel pipistrello nano (<em>Pipistrellus pipistrellusem> e della successiva conferma su basi genetiche dell'esistenza di due specie distinte, designate come pipistrello nano (<em>P. pipistrellusem> e pipistrello pigmeo (<em>P. pygmaeusem>, la distinzione delle due specie in base a caratteristiche morfologiche esterne si è dimostrata un problema di difficile soluzione. Sulla base delle caratteristiche distintive e delle differenze biometriche proposte da altri Autori, sono state esaminate due colonie di pipistrello pigmeo a Donji Miholjac, in Croazia. I risultati ottenuti evidenziano che, tra tutti i potenziali caratteri sinora proposti, solo due risultano utili per un'identificazione diretta sul campo: la venatura delle ali, risultata utile alla discriminazione nell'89% degli esemplari analizzati, e la colorazione e morfologia del pene nei maschi. La

  8. Variabilità morfologica ed ecologica in <em>Neomys fodiensem> e <em>Neomys anomalusem> nell'Appennino settentrionale

    Directory of Open Access Journals (Sweden)

    Dino Scaravelli

    2003-10-01

    Full Text Available I due <em>Neomys> italiani sono ancora da chiarire dal punto di vista della loro caratterizzazione morfologica e ecologica. Il lavoro prende in considerazione un campione di entrambe le specie proveniente da habitat forestali dell?Appennino settentrionale per i quali sono stati identificati i principali parametri ambientali. Vengono quindi descritte la variabilità dei tratti morfologici delle due specie in aree localizzate nel Parco Nazionale Foreste Casentinesi, Monte Falterona e Campigna nell?Appennino tosco-romagnolo. Risultano di sicuro effetto discriminatorio la maschera facciale, il rapporto piede posteriore/coda e i caratteri cranici. Sulla base dei criteri identificativi si sono realizzate rilevazioni di misure corporee per le due specie e una comparazione degli habitat utilizzati. <em>N. fodiensem> appare unica specie nelle faggete-abetine e dominante nei castagneti, mentre nell?Ontaneta e nelle zone aperte e termofile si registra la sola presenza di <em>N. anomalusem>. Mancano entrambi nei prati cespugliati, nella pecceta e nella cerreta. I gradienti presenti sono quindi illustrati. Non appare una differenza altitudinale nel campione esaminato, posto in stazioni tra i 400 e i 1300 m, ma per entrambe vi sono maggiori riscontri nella fascia tra 700 e 850 m. Nell?analisi multivariata rispetto alle altre specie e alle variabili ambientali si riscontra sempre una discreta correlazione con la presenza di acqua di una certa ampiezza, che comunque è significativa solo per <em>N. fodiensem>, mentre risulta di interesse la positiva correlazione di <em>N. anomalusem> con <em>Apodemus sylvaticusem>.

  9. Crecimiento foliar y radical en plantas de fique (<em>Furcraea castillaem> y <em>F. macrophyllaem> bajo estrés por encharcamiento

    Directory of Open Access Journals (Sweden)

    Casierra-Posada Fánor

    2008-12-01

    Full Text Available

    En regiones tropicales y subtropicales se producen pérdidas en las plantas cultivadas como consecuencia de lluvias estacionales prolongadas. El exceso de agua produce condiciones de anoxia en el suelo en pocas horas. Las raíces sufren hipoxia o anoxia, lo cual tiene como resultado una crisis energética que afecta el crecimiento de la planta. El presente estudio se orientó hacia la determinación de crecimiento foliar y radical en dos especies de fique (<em>Furcraea castillaem> y <em>F. macrophyllaem> cultivadas en encharcamiento en campo abierto en Tunja, Colombia. Las plantas se desarrollaron a partir de bulbilos, en bolsas plásticas con 3 kg de suelo. Las plantas control se regaron cada 4 días. Las bolsas de las plantas encharcadas se cubrieron con una bolsa plástica adicional para limitar el drenaje y se regaron hasta mantener el agua 1 cm por encima de la superficie del suelo. En ambas especies la materia seca total de la planta, el peso específico de las hojas y el área foliar se redujeron con el encharcamiento, mientras que la longitud total radical se incrementó. La relación raíz:vástago se redujo en <em>F. macrophyllaem> pero se incrementó en <em>Furcraea castillaem>. A pesar de que ambas especies fueron fuertemente afectadas por el encharcamiento, <em>F. macrophyllaem> mostró mejor adaptación a este factor de estrés que <em> F. castillaem>.

  10. Tumores em bovinos encontrados em abatedouros frigoríficos

    Directory of Open Access Journals (Sweden)

    Bianca Tessele

    2016-03-01

    Full Text Available Resumo: Numa pesquisa em abatedouros a procura de lesões em bovinos, realizada de janeiro de 2011 a julho de 2014, 544 foram encontradas, das quais 65 eram neoplasmas. Quarenta e dois porcento desses tumores eram de origem mesenquimal; 37% eram epiteliais; 14,5% eram derivados da crista neural; 5% eram tumores do cordão sexual; e 1,5 eram tumores originários do sistema nervoso periférico. O tumor mais frequentemente encontrado foi o linfoma (28% de todos os tumores, a maioria dos casos como parte do complexo leucose bovina enzoótica. O carcinoma de células escamosas foi o segundo tumor mais frequente (15% de todos os tumores. É chamada a atenção para a frequência desses tumores e para a sua importância no diagnóstico diferencial no abatedouro frigorífico entre eles e outras lesões importantes, incluindo as lesões granulomatosas da tuberculose. Houve uma ocorrência significativa do feocromocitoma adrenal (13% de todos os tumores. Papilomatose representou apenas 3% de todos os tumores. Como papilomas são comuns em bovinos, seu baixo número nesse estudo pode ser explicado pelo fato de que eles não são usualmente diagnosticados no exame post mortem (quando o couro já foi retirado da carcaça, mas sim no exame ante mortem, como ocorreu na maioria dos casos deste estudo. Tumores encontrados com menor frequência (cada um perfazendo entre 1.5 e 3% de todos os tumores incluíram adenocarcinoma apócrino misto da cauda, adenocarcinoma mamário, adenocarcinoma uterino, carcinoma de células renais, fibroma interdigital, hemangiossarcoma, leiomioma uterino, lipoma, lipossarcoma, mesotelioma, neurofibroma, tumor de células da granulosa, tumor estromal gastrointestinal, tumores hepáticos, tumores melanocíticos, e tumores pulmonares primários. Pretende-se que os resultados dessa pesquisa possam ajudar na identificação das lesões na inspeção oficial em matadouros frigoríficos.

  11. Consumo de fibra em detergente neutro por bovinos em confinamento

    Directory of Open Access Journals (Sweden)

    Detmann Edenio

    2003-01-01

    Full Text Available Objetivou-se avaliar o consumo de fibra em detergente neutro (FDN por bovinos em confinamento e os principais fatores que influenciam esta variável, correlacionado-a ao consumo de matéria seca (MS total. Foram avaliados dados publicados na Revista da Sociedade Brasileira de Zootecnia e Revista Brasileira de Zootecnia, no período de 1991 e 2000, totalizando 45 trabalhos científicos e 181 médias de tratamentos. O nível de nutrientes digestíveis totais mostrou-se negativamente correlacionado ao nível de FDN nas dietas (r = -0,6006; P0,10. A descrição da relação entre consumo de MS e nível de FDN na dieta foi realizada de forma bifásica, buscando similaridade às curvas propostas por um modelo estático de predição do consumo. A interseção das curvas projetou consumo de FDN (CFDN de 11,93 g/kg PV. No entanto, a avaliação dos CFDN estimados durante a fase atribuída aos controladores físicos do consumo mostrou inconstância, gerando divergência entre os pontos de consumo máximo de MS e FDN, indicando ser a transição entre os mecanismos físicos e fisiológicos, possivelmente, determinada por um intervalo com interação entre mecanismos. A avaliação do CFDN em função do nível de volumosos nas dietas mostrou perfis estáveis em concentrações superiores a 60%, sendo de 13,53 g/kg PV no intervalo de 80 a 100%. Possíveis interações com a fração indigestível da FDN podem ditar a plasticidade do limite diário de CFDN.

  12. COLABORAÇÃO EM MASSA OU AMADORISMO EM MASSA?

    OpenAIRE

    Resende da Silva, Paulo; Rodrigues, Fernando Nifrário

    2013-01-01

    O alfa e o ómega deste estudo é a tentativa de provar a credibilidade da colaboração em massa enquanto pedra angular do modelo de negócio comummente denominado por open source. Para o demonstrar, realizou-se um estudo comparativo entre a qualidade dos artigos da Wikipédia e da Enciclopédia Britânica, tendo sido dado particular relevo à metodologia utilizada de modo a que os resultados obtidos fossem os mais fidedignos e abrangentes possíveis. É utilizada uma amostra aleatória representativ...

  13. Lectin from <em>Canavalia brasiliensisem> Seeds (ConBr Is a Valuable Biotechnological Tool to Stimulate the Growth of <em>Rhizobium tropiciem> <em>in Vitroem>

    Directory of Open Access Journals (Sweden)

    Ricardo Pires dos Santos

    2012-05-01

    Full Text Available To study the interactions between a <em>Rhizobium tropiciem> strain and lectins isolated from the seeds of <em>Canavalia ensiformisem> (ConA and <em>Canavalia brasiliensisem> (ConBr, a lectin fluorescence assay was performed. In addition, an experiment was designed to evaluate the effect of the two lectins on bacterial growth. Both lectins were found to bind to <em>R. tropiciem> cells, but the interactions were inhibited by D-mannose. Interestingly, only ConBr stimulated bacterial growth in proportion to the concentrations used (15.6–500 µg/mL, and the bacterial growth stimulation was inhibited by D-mannose as well. Structure/Function analyses by bioinformatics were carried out to evaluate the volume and carbohydrate recognition domain (CRD configuration of ConA and ConBr. The difference of spatial arrangement and volume of CRD may indicate the variation between biological activities of both lectins. The results suggest that ConBr could be a promising tool for studies focusing on the interactions between rhizobia and host plants.

  14. Preparation of PtSn/C, PtRu/C, PtRh/C, PtRuRh/C and PtSnRh/C electrocatalysts using an alcohol-reduction process for methanol and ethanol oxidation; Preparacao e caracterizacao de eletrocatalisadores PtRu, PtSn, PtRh, PtRuRh e PtSnRh para oxidacao direta de alcoois em celulas a combustivel tipo PEM utilizando a metodologia da reducao por alcool

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Ricardo Rodrigues

    2009-07-01

    In this work, Pt/C, PtRh (90:10), PtRh/C (50:50), PtSn/C (50:50), PtRu (50:50)/C, PtRuRh/C (50:40:10) and PtSnRh/C (50:40:10) were prepared by an alcohol-reduction process with metal loading of 20 wt.% using H{sub 2}PtCl{sub 6}.6H{sub 2}O (Aldrich), SnCl{sub 2}.2H{sub 2}O (Aldrich),and RhCl{sub 2}.XH{sub 2}O (Aldrich) as metals sources and Vulcan XC72 as support. The electrocatalysts were characterized by EDX, XRD and cyclic voltammetry (CV). The electro-oxidation of ethanol was studied by CV, chronoamperomety at room temperature in acid medium and tests at 100 deg C on a single cell of a direct methanol or ethanol fuel cell. The EDX analysis showed that the metal atomic ratios of the obtained electrocatalysts were similar to the nominal atomic ratios used in the preparation. The diffractograms of electrocatalysts prepared showed four peaks at approximately 2{theta} =40 deg, 47 deg, 67 deg and 82 deg, which are associated with the (111), (200), (220) and (311) planes, respectively, of a face cubic-centered (fcc) structure characteristic of platinum and platinum alloys. The average crystallite sizes using the Scherrer equation and the calculated values were in the range of 2-3 nm. For Pt Sn/C and PtSnRh/C two additional peaks were observed at 2 = 34 deg and 52 deg that were identified as a SnO{sub 2} phase. Pt Sn/C (50:50) and PtSnRh/C (50:40:10) electro catalyst showed the best performance for ethanol oxidation at room temperature. For methanol oxidation at room temperature Pt Ru/C, Pt Sn/C and PtRuRh/C electrocatalysts showed the best performance. Tests at 100 deg C on a single cell of a direct ethanol fuel cell PtSnRh/C showed the best performance, for methanol oxidation PtRuRh/C showed the best performance. (author)

  15. Synthesis and characterization of the perovskite Sm{sub 0.5}Sr{sub 0.5}CoO{sub 3} for using as cathode in solid oxide fuel cells; Sintese e caracterizacao da provsquita Sm{sub 0.5}Sr{sub 0.5}CoO{sub 3} para utilizacao como catodo em celulas a combustivel de oxido solido

    Energy Technology Data Exchange (ETDEWEB)

    Blanco, P.H.L.; Muccillo, R.; Muccillo, E.N.S. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: enavarro@usp.br

    2008-07-01

    Solid oxide fuel cells are basically constituted by ceramic materials, a solid electrolyte sandwiched between two electrodes. A number of ceramic materials with perovskite structure have been proposed to act as electrode material due to the combination of their physical and chemical properties along with compatibility with the solid electrolyte. In this work the mixed oxide Sm{sub 0,5}Sr{sub 0,5}CoO{sub 3} was synthesized by the cation complexation technique. This perovskite oxide has been proposed as cathode in solid oxide fuel cells that operates in the intermediate temperature range ({approx} 500 to {approx} 700 deg C). Citric acid was used as complexant agent. The thermal decomposition of the precursor material occurs in several stages up to 600 deg C. After calcinations at 700 deg C the mixed oxide exhibits the characteristic perovskite phase of Sm{sub 0,5} Sr{sub 0,5}CoO{sub 3} the microstructure of the thermally decomposed material consists of porous agglomerates. This technique allowed for obtaining a single phase material at a relatively lower temperature. (author)

  16. Encapsulation-Induced Stress Helps <em>Saccharomyces cerevisiae em>Resist Convertible Lignocellulose Derived Inhibitors

    Directory of Open Access Journals (Sweden)

    Johan O. Westman

    2012-09-01

    Full Text Available The ability of macroencapsulated <em>Saccharomyces cerevisiae em>CBS8066<em> em>to withstand readily and not readily <em>in situem> convertible lignocellulose-derived inhibitors was investigated in anaerobic batch cultivations. It was shown that encapsulation increased the tolerance against readily convertible furan aldehyde inhibitors and to dilute acid spruce hydrolysate, but not to organic acid inhibitors that cannot be metabolized anaerobically. Gene expression analysis showed that the protective effect arising from the encapsulation is evident also on the transcriptome level, as the expression of the stress-related genes <em>YAP1em>, <em>ATR1em> and <em>FLR1em> was induced upon encapsulation. The transcript levels were increased due to encapsulation already in the medium without added inhibitors, indicating that the cells sensed low stress level arising from the encapsulation itself. We present a model, where the stress response is induced by nutrient limitation, that this helps the cells to cope with the increased stress added by a toxic medium, and that superficial cells in the capsules degrade convertible inhibitors, alleviating the inhibition for the cells deeper in the capsule.

  17. Altitudinal distribution of the common longeared bat <em>Plecotus auritusem> (Linnaeus, 1758 and grey long-eared bat <em>Plecotus austriacusem> (J. B. Fischer, 1829 (Chiroptera, Vespertilionidae in the Tatra mountains (southern Poland

    Directory of Open Access Journals (Sweden)

    Krzysztof Piksa

    2006-03-01

    Full Text Available Riassunto Distribuzione altitudinale di Orecchione bruno (<em>Plecotus auritusem> e Orecchione meridionale (<em>Plecotus austriacusem> nei Monti Tatra (Polonia meridionale. Vengono riportati nuovi dati relativi alla distribuzione altitudinale nei Monti Tatra (Polonia meridionale di <em>Plecotus auritusem> e <em>P. austriacusem>. Tali segnalazioni incrementano le conoscenze relative alla presenza di questi chirotteri a quote elevate, in particolare per la Polonia. In inverno <em>P. auritusem> è stato rinvenuto a 1921 m s.l.m. mentre in estate è stato rinvenuto a 2250 m s.l.m.; in aggiunta, sono stati ritrovati resti ossei a 1929 m s.l.m. <em>P. austriacusem> è stato segnalato in ibernazione a 1294 m s.l.m.

  18. Funcionalidade familiar em longevos residentes em domicílio

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    Ivania Vera

    2015-02-01

    Full Text Available Objetivo: identificar os fatores associados à funcionalidade familiar de longevos não institucionalizados residentes em Goiânia (GO, Brasil. Método: tratou-se de um estudo epidemiológico, de base populacional, com delineamento transversal. Foram aplicadas escalas de avaliação da capacidade funcional e cognitiva. A dinâmica familiar foi mensurada utilizando o Adaptation, Partnership, Growth, Affection and Resolve (APGAR por meio de entrevista domiciliar com 131 longevos. Resultados: houve prevalência do sexo feminino, média de idade de 83,87 anos, condição de viuvez, residindo em família extensa, escolaridade primária e autopercepção de saúde regular. Grande parcela despontou independência para autocuidado e dependência parcial para Atividades Instrumentais de Vida Diária. A funcionalidade familiar prevaleceu com média do escore de 9,06 pontos. Conclusão: concluiu-se que a funcionalidade familiar nos longevos está associada à autopercepção de saúde ruim/péssima, osteoporose e queda. Os resultados permitiram caracterizar a funcionalidade familiar de longevos, com vistas à valorização e à priorização da família como cuidadora.

  19. Brasil em obras, peões em luta, sindicatos surpreendidos

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    Roberto Véras

    2014-05-01

    Full Text Available O presente artigo aborda as revoltas e greves ocorridas em março de 2011 em canteiros de obras do Programa de Aceleração do Crescimento (PAC, do Governo Federal, que alcançou grande repercussão nacional. Tem como foco os conflitos e as negociações, envolvendo trabalhadores, sindicatos, empresários, Governo, Justiça, Ministério Público do Trabalho, entre outros atores, estabelecidos durante a construção das Usinas Hidroelétricas de Jirau e Santo Antônio, situadas no Norte do país. Visou identificar as posições dos referidos atores e, sob uma perspectiva sociológica, propor reflexões sobre as potencialidades e os limites da atividade sindical. Que questões trouxeram tais acontecimentos ao sindicalismo, quanto às relações deste, de um lado, com suas próprias bases e, de outro, com o atual projeto governamental?

  20. Conceito de liberdade em Vigotski

    OpenAIRE

    Toassa, Gisele

    2004-01-01

    Este texto sintetiza os fundamentos do conceito de liberdade vigotskiano, procurando elucidar suas conexões a partir das investigações do autor sobre linguagem, vontade, funções psíquicas superiores, pensamento e imaginação. Discutem-se, ainda, os antecedentes filosóficos presentes no seu conceito de liberdade e se esboça uma análise das condições concretas necessárias para a livre-escolha em tempos de alienação. This text summarises the fundamental points of Vygotsky´s freedom concept, wi...

  1. Conceito de liberdade em Vigotski

    Directory of Open Access Journals (Sweden)

    Gisele Toassa

    Full Text Available Este texto sintetiza os fundamentos do conceito de liberdade vigotskiano, procurando elucidar suas conexões a partir das investigações do autor sobre linguagem, vontade, funções psíquicas superiores, pensamento e imaginação. Discutem-se, ainda, os antecedentes filosóficos presentes no seu conceito de liberdade e se esboça uma análise das condições concretas necessárias para a livre-escolha em tempos de alienação.

  2. A melancolia em Al Berto

    OpenAIRE

    Camila Emanuele Martins de Souza

    2015-01-01

    Este trabalho objetiva estudar, sob a perspectiva da melancolia, os livros Salsugem (1984) e Horto de Incêndio (1997), de Al Berto. O autor português produz escritos em que a temática da melancolia atravessa a palavra, o que justifica o debruçar-se sobre as construções textuais da poética albertiana, a fim de traçar-lhe novas possibilidades de leitura por esse ângulo. Para isso, com o intuito de compreender o discurso melancólico segue-se o embasamento teórico: de Klibansky, Panosfsky e Saxl ...

  3. A Favela posta em Cena

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    Fabiana Valdoski Ribeiro

    2010-08-01

    As publicações do Observatório das Favelas nos instigam na construção de um espaço transgressor Possível como necessidade de uma ação urgente, contudo a perspectiva do Impossível como projeto nos promove a revelar os limites, as normas e as ideologias que perpassam as ações internas ao Estado, já que este se constitui agente fundamental da engrenagem da produção de desigualdades e em sua força legitimadora realiza a ideologia mais eficiente.

  4. O humor em cuidados paliativos

    OpenAIRE

    Fernandes, Cláudia Joana Alves

    2015-01-01

    Dissertação de Mestrado em Cuidados Paliativos apresentada na Escola Superior de Saúde do Instituto Politécnico de Viana do Castelo O ser humano diferencia-se dos outros seres vivos pela capacidade que possui de sorrir. Esta característica ajuda-o a enfrentar os problemas que se lhe afiguram no quotidiano da vida, sejam eles de índole pessoal, profissional, familiar ou relacional. Assim o humor, presente desde sempre, emerge como uma necessidade para o crescimento individual, e ...

  5. Laddering em pesquisa de marketing

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    Tânia Modesto Veludo-de-Oliveira

    Full Text Available O artigo discute a técnica de pesquisa laddering em marketing, considerando a proposta de renovação de conhecimentos sobre metodologia na área. Para isso investiga diversos estudos, artigos e pesquisas que tratam do assunto em nível nacional e internacional. O conceito de cadeias meios-fins é abordado pela estrutura teórica que fundamenta a técnica, ligando atributos, conseqüências percebidas do consumo e valores pessoais relativos a um produto. O artigo segue com a explicação dos procedimentos de campo, como a entrevista e a análise dos dados. A laddering é um instrumento de pesquisa qualitativa bastante útil e poderoso, mas ainda pouco utilizado tanto por acadêmicos como por profissionais de mercado, no Brasil, provavelmente por desconhecimento e pouca divulgação. Cabe, portanto, uma maior disseminação de seu uso.

  6. Grupo Focal em Pesquisas Sociais

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    Maria Lúcia Silva Servo

    2012-10-01

    Full Text Available Este artigo tem como objetivo discutir a técnica de grupo focal em pesquisas sociais. Apresenta-se as concepções sobre grupo focal. Traz-se os postulados de Pichon-Rivière sobre grupo operativo, os instrumentos de planificação, os vetores do campo grupal para nortear a dinâmica e a observação do campo grupal, bem como a organização, a operacionalização e a análise dos dados das sessões de grupo focal. Através desta técnica de coleta de dados em pesquisas sociais, é possível a construção do ECRO grupal sobre a tarefa proposta pelo pesquisador; e, a elaboração do projeto grupal a partir da aceitação ativa dos sujeitos sociais participantes da investigação.

  7. Fatores antinutricionais em plantas forrageiras

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    Natanael de Souza Silva

    2012-12-01

    Full Text Available As análises bromatológicas definem a qualidade nutricional das forragens: degradabilidade ruminal, digestibilidade e composição química. No entanto, existem compostos denominados de antinutricionais (limitam a ingestão e a digestão das forragens que não são determinados pelas análises convencionais. Os fatores antinutricionais são de natureza química ou estrutural. Os principais fatores químicos limitantes das forragens são os alcalóides, compostos fenólicos e substâncias terpênicas, enquanto que os estruturais são a arquitetura tissular, as células lignificadas e a sílica. Desta forma, com o presente trabalho objetiva-se apresentar os principais fatores antinutricionais em plantas forrageiras relatados na literatura. Futuras pesquisas envolvendo a avaliação de plantas forrageiras devem levar em conta uma série de características, dentre estas: seus aspectos agronômicos e bromatológicos, sua natureza estrutural, presença de matabólitos secundários e desempenho animal, visando com isso, avaliar o seu real potencial nutritivo.

  8. Dualismos em duelo Dueling dualism

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    Anne Fausto-Sterling

    2002-01-01

    Full Text Available Os modos europeus e norte-americanos de entender como funciona o mundo dependem em grande parte do uso de dualismos - pares de conceitos, objetos ou sistemas de crenças opostos. Este ensaio enquadra especialmente três deles: sexo/gênero, natureza/criação e real/construído. Embora este texto verse sobre gênero, discuto regularmente o modo como as idéias de raça e gênero surgem a partir de supostos subjacentes sobre a natureza física do corpo. Entender como operam raça e gênero - em conjunto e independentemente - nos ajuda a compreender melhor como o social se torna corporificado.Euro-American ways of understanding how the world works depend heavily on the use of dualisms - pairs of opposing concepts, objects, or belief sytems. This text focuses especially on three of these: sex/gender, nature/nurture, and real/constructed. And although this text focuses on gender, I regularly discuss the ways in which the ideas of both race and gender emerge from underlying assumptions about the body's physical nature. Understanding how race and gender work - together and independently - help us learn more about how the social becomes embodied.

  9. A agricultura paulista em 1905

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    Francisco Vidal Luna

    2014-03-01

    Full Text Available O estudo revelou a importância da cafeicultura e que a grande produção cafeeira coexistia com milhares de pequenos e médios produtores também dedicados à cafeicultura. Mostrou também a existência de ampla produção agrícola voltada ao mercado interno, cultivos em grande parte feitos em unidades produtoras de café. A Mogiana era a região agrícola mais importante e o Vale do Paraíba havia perdido importância na agricultura paulista. O estudo também demonstra a alta produtividade das áreas novas. A ampla rede ferroviária existente permitia expandir a agricultura mantendo ou mesmo ampliando a produtividade da agricultura. Com disponibilidade de terras e com uma intensa imigração europeia, apenas o mercado poderia evitar a expansão da cafeicultura. Merece realce a baixa tecnologia adotada. Poucos agricultores, mesmo nas regiões mais dinâmicas, utilizavam arados e outros equipamentos similares ou se serviam de adubos químicos.

  10. Metodologia de minienxertia em maracujazeiros

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    Rodrigo Sobreira Alexandre

    2013-03-01

    Full Text Available O objetivo foi avaliar a metodologia de enxertia pela modalidade garfagem no topo hipocotiledonar em fenda cheia, utilizando miniestacas adultas de segmentos apicais de P. edulis f. flavicarpa, P. edulis, P. alata, P. mucronata e P. foetida e internodais de P. mucronata. O experimento foi conduzido em casa de vegetação equipada com sistema de irrigação com nebulização intermitente, do Centro Universitário Norte do Espírito Santo (CEUNES, da Universidade Federal do Espírito Santo (UFES. Os índices de pegamento nas combinações de P. edulis f. flavicarpa/P. edulis f. flavicarpa, P. edulis/P. edulis f. flavicarpa, P. alata/P. edulis f. flavicarpa, P. mucronata/P. edulis f. flavicarpa, P. foetida/P. edulis f. flavicarpa foram de 90; 90; 68; 80 e 90, respectivamente. A metodologia empregada é uma nova opção de enxertia para essas espécies do gênero Passiflora.

  11. Ser marrano em Minas Colonial

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    Anita Novinsky

    2001-01-01

    Full Text Available Baseado em 57 Processos inéditos de marranos (cristãos-novos, conversos presos em Minas Gerais no século XVIII, este artigo procura mostrar seu papel na Idade de Ouro do Brasil. 64% deles eram mercadores e 23% eram mineiros. Pertenciam à classe média e raros eram os magnatas. Nenhum dele esteve envolvido no tráfico negreiro. Acusados do crime de judaísmo e de pertencerem a sociedades secretas, representaram 42% dos brasileiros condenados à morte. Ser marrano entre os portugueses no Brasil mais um sentimento e uma visão de mundo do que uma prática religiosa.Based on 57 unknown trials of marranos (new christians, conversos arrested by the Inquisition in Minas Gerais in the XVIII the century, this article shows their role in shapping the history of Minas Gerais. 64% of them were merchants na 23% were miners. Most of them belonged to a middle class and rare were those whit great fortunes. No one of them were engaged in slave trade. Acused of judaism and of participating in secret society the marranos of Minas represented 42% of the Brazilian burned at the stake. Being a marrano in Minas Gerais was not always being a crypto-new. Marranism in Brasil was a feeling and a approach to life.

  12. PEG Enhancement for EM1 and EM2+ Missions

    Science.gov (United States)

    Von der Porten, Paul; Ahmad, Naeem; Hawkins, Matt

    2018-01-01

    NASA is currently building the Space Launch System (SLS) Block-1 launch vehicle for the Exploration Mission 1 (EM-1) test flight. The next evolution of SLS, the Block-1B Exploration Mission 2 (EM-2), is currently being designed. The Block-1 and Block-1B vehicles will use the Powered Explicit Guidance (PEG) algorithm. Due to the relatively low thrust-to-weight ratio of the Exploration Upper Stage (EUS), certain enhancements to the Block-1 PEG algorithm are needed to perform Block-1B missions. In order to accommodate mission design for EM-2 and beyond, PEG has been significantly improved since its use on the Space Shuttle program. The current version of PEG has the ability to switch to different targets during Core Stage (CS) or EUS flight, and can automatically reconfigure for a single Engine Out (EO) scenario, loss of communication with the Launch Abort System (LAS), and Inertial Navigation System (INS) failure. The Thrust Factor (TF) algorithm uses measured state information in addition to a priori parameters, providing PEG with an improved estimate of propulsion information. This provides robustness against unknown or undetected engine failures. A loft parameter input allows LAS jettison while maximizing payload mass. The current PEG algorithm is now able to handle various classes of missions with burn arcs much longer than were seen in the shuttle program. These missions include targeting a circular LEO orbit with a low-thrust, long-burn-duration upper stage, targeting a highly eccentric Trans-Lunar Injection (TLI) orbit, targeting a disposal orbit using the low-thrust Reaction Control System (RCS), and targeting a hyperbolic orbit. This paper will describe the design and implementation of the TF algorithm, the strategy to handle EO in various flight regimes, algorithms to cover off-nominal conditions, and other enhancements to the Block-1 PEG algorithm. This paper illustrates challenges posed by the Block-1B vehicle, and results show that the improved PEG

  13. Terapia breve em hospital fechado

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    Paulo Cesar Sandler

    1978-09-01

    Full Text Available O presente estudo cuida de pacientes "difíceis" da clínica psiquiátrica e psicoterápica: os pacientes que apresentam o fenômeno da atuação, cuja aproximação terapêutica tem se demonstrado problemática, mesmo com o advento das modernas técnicas de psicoterapia e das comunidades terapêuticas. Os diagnósticos psiquiátricos destes pacientes variam: são neuróticos, apresentam transtornos de pesonalidade, são psicóticos e quase sempre com graves doenças secundárias: alcoolismo e toxicomania (Códigos Classificação Internacional de Doenças 295 a 299, 300. 301, 303 e 304. Propõe-se, à luz da compreensão psicanalítica destas pessoas, um tratamento psicoterápico breve, focal, com o auxílio de uma hospitalização em regime fechado. Para a avaliação dos resultados do método psicoterápico diádico, criaram-se critérios de cura coerentes com a proposta terapêutica, e equiparam-se estes critérios clínicos a valores numéricos. Utilizando 36 pacientes internados, verificou-se até que ponto eles alcançavam estes critérios. Cada paciente recebeu um escore - valor numérico - que expressou o seu desempenho durante o tratamento em regime de internação, e sua conduta pós-alta hospitalar, durante um seguimento médio de 21 meses. Estes 36 pacientes puderam ser divididos em dois grupos: os de evolução favorável (obtivemos 36,1% e os de evolução desfavorável. Por meio de uma amostra sistemática composta por 41 pacientes que não foram submetidos ao método, internados no mesmo período de tempo, no mesmo hospital, e pareados com nossa casuística, fêz-se uma comparação estatística entre os percentis obtidos nas evoluções dos dois grupos. O valor do teste estatístico, o chi quadrado, não foi significante. O exame das proporções correspondentes a cada patologia em separado sugeriu fortemente que o tratamento estaria indicado nas neuroses e nas psicoses, mas que seria realmente ineficaz nos transtornos de

  14. Bioassay-Guided Antidiabetic Study of <em>Phaleria macrocarpaem> Fruit Extract

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    Mohd Z. Asmawi

    2012-04-01

    Full Text Available An earlier anti-hyperglycemic study with serial crude extracts of <em>Phaleria macrocarpaem> (PM fruit indicated methanol extract (ME as the most effective. In the present investigation, the methanol extract was further fractionated to obtain chloroform (CF, ethyl acetate (EAF, <em>n>-butanol (NBF and aqueous (AF fractions, which were tested for antidiabetic activity. The NBF reduced blood glucose (<em>p> < 0.05 15 min after administration, in an intraperitoneal glucose tolerance test (IPGTT similar to metformin. Moreover, it lowered blood glucose in diabetic rats by 66.67% (<em>p> em>< 0.05, similar to metformin (51.11%, glibenclamide (66.67% and insulin (71.43% after a 12-day treatment, hence considered to be the most active fraction. Further fractionation of NBF yielded sub-fractions I (SFI and II (SFII, and only SFI lowered blood glucose (<em>p em>< 0.05, in IPGTT similar to glibenclamide. The ME, NBF, and SFI correspondingly lowered plasma insulin (<em>p em>< 0.05 and dose-dependently inhibited glucose transport across isolated rat jejunum implying an extra-pancreatic mechanism. Phytochemical screening showed the presence of flavonoids, terpenes and tannins, in ME, NBF and SFI, and LC-MS analyses revealed 9.52%, 33.30% and 22.50% mangiferin respectively. PM fruit possesses anti-hyperglycemic effect, exerted probably through extra-pancreatic action. Magniferin, contained therein may be responsible for this reported activity.

  15. OCCURENCE OF Salmonella IN CHICKEN CARCASSES AND CUTS COMMERCIALIZED IN GOIÂNIA-GO OCORRÊNCIA DE Salmonella EM CARCAÇAS E CORTES DE FRANGOS COMERCIALIZADOS EM GOIÂNIA-GO

    Directory of Open Access Journals (Sweden)

    Iolanda Aparecida Nunes

    2007-09-01

    Full Text Available

    Its was analised 53 chicken carcasses and commercial cuts acquired in supermarkets of Goiânia-GO aiming to isolate <em>Salmonella>. The contamination rate was 13.2% and serotypes <em>S. brandenburgem>, <em>S. typhimuriumem>, <em>S. agonaem>, <em>S. derbyem> and <em>S. hadorem> were identified.

    KEY-WORDS: <em>Salmonella>; chicken; chicken carcasses; commercial cuts.

    No presente estudo foram analisadas, com vistas ao isolamento de <em>Salmonella>, 53 amostras de carcaças e cortes comerciais de frangos colhidas em supermercados e casas de carnes de Goiânia - GO. Observou-se freqüência média do patógeno de 13,2%, sendo identificados os sorotipos <em>E. brandenburgem>, <em>S. typhimuriumem>, <em>S.> <em>agona>, <em>S. derbyem> e <em>S. Hadarem>.

    PALAVRAS-CHAVE: <em>Salmonella>; frango de corte; carcaça; cortes comerciais.

  16. Species Differentiation of Chinese <em>Mollitrichosiphum> (Aphididae: Greenideinae Driven by Geographical Isolation and Host Plant Acquirement

    Directory of Open Access Journals (Sweden)

    Gexia Qiao

    2012-08-01

    Full Text Available The impact of both the uplift of the Qinghai-Tibetan Plateau (QTP and the separation of the Taiwan and Hainan Islands on the evolution of the fauna and flora in adjacent regions has been a topic of considerable interest. <em>Mollitrichosiphum> is a polyphagous insect group with a wide range of host plants (14 families and distributions restricted to Southeast Asia. Based on the mitochondrial Cytochrome C Oxidase Subunit I (COI and Cytochrome b (Cytb genes, the nuclear elongation factor-1α (EF-1α gene, and the detailed distribution and host plant data, we investigated the species differentiation modes of the Chinese <em>Mollitrichosiphum> species. Phylogenetic analyses supported the monophyly of <em>Mollitrichosiphum>. The divergence time of <em>Mollitrichosiphum tenuicorpus em>(c>. 11.0 mya (million years ago, <em>Mollitrichosiphum nandiiem> and<em> Mollitrichosiphum montanumem> (<em>c>. 10.6 mya was within the time frame of the uplift of the QTP. Additionally, basal species mainly fed on Fagaceae, while species that fed on multiple plants diverged considerably later. Ancestral state reconstruction suggests that Fagaceae may be the first acquired host, and the acquisition of new hosts and the expansion of host range may have promoted species differentiation within this genus. Overall, it can be concluded that geographical isolation and the expansion of the host plant range may be the main factors driving species differentiation of <em>Mollitrichosiphum>.

  17. Fatores associados ao fumo em gestantes avaliadas em cidades brasileiras

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    Kroeff Locimara Ramos

    2004-01-01

    Full Text Available OBJETIVO: Avaliar a correlação dos fatores sociodemográficos e estilo de vida com o hábito de fumar em gestantes atendidas em hospitais. MÉTODOS: O delineamento foi o de um estudo transversal. A amostra foi composta por 5.539 gestantes atendidas em ambulatórios de pré-natal em hospitais públicos credenciados nas cidades de Manaus, Fortaleza, Salvador, Rio de Janeiro, São Paulo e Porto Alegre, entre 1991 e 1995. A seleção foi consecutiva para todas as gestantes com 20 anos ou mais de idade, excetuando-se aquelas com diabetes prévia à gestação. Foram realizadas medidas antropométricas e entrevistas entre a 21ª e a 28ª semanas da gravidez. Por meio de um questionário padronizado, considerou-se como fumante quem informou fumar um ou mais cigarros por dia, como ex-fumante quem informou ter fumado mais de um cigarro por dia e ter cessado, e não fumantes quem informou nunca ter fumado um ou mais cigarros por dia. RESULTADOS: O hábito de fumar na gestação associou-se à baixa escolaridade (RC=2,13; IC 95%: 1,76-2,57 e paridade (RC=1,84; IC 95%: 1,53-2,21. Para o aumento da idade da gestante e uso de bebidas alcóolicas também foram observadas associações positivas com o fumo na gestação. Não foi observada nenhuma associação significativa entre cor da pele e situação ocupacional com fumo na gestação. Um efeito protetor foi observado para mulheres casadas ou com companheiro (RC=0,55; IC 95%: 0,42-0,72. Entre as cidades, tomando Manaus como referência, Porto Alegre apresentou o maior risco para fumo na gestação (RC=5,00; IC 95%: 3,35-7,38, seguida de São Paulo (RC=3,42; IC 95%: 2,25-5,20, Rio de Janeiro (RC=2,53; IC 95%: 1,65-3,88 e Fortaleza (RC=2,56; IC95%: 1,74-3,78. CONCLUSÕES: Os achados são semelhantes àqueles descritos na literatura com relação à escolaridade, paridade e situação conjugal. Entretanto, nenhuma associação com a cor da pele foi observada na análise multivariada. As ex-fumantes mostraram

  18. Alimentazione di <em>Marmota marmotaem> in praterie altimontane delle dolomiti bellunesi

    Directory of Open Access Journals (Sweden)

    Alessandro Rudatis

    2006-03-01

    Full Text Available Abstract The diet of <em>Marmota marmotaem> in the mountain prairie of south-eastern Italian Alps. Diet composition of two family groups of alpine marmots was investigated in two areas of the Agordino’s Dolomites (Italian Alps in June-September 2001, by means of microscopic analysis of faeces and of direct observation of feeding activity. During the whole period of activity, a high consume of Angiosperms was confirmed, especially plants in flower; among them the “graminoids” seemed to play an important role only during the initial part of the active period. Generally vegetative parts predominated over flowers. The ingestion of animal preys was not confirmed by the analysis of droppings. Comparing diet composition of the two groups, Graminaceae (<em>Poa>, <em>Phleum>, Compositae (<em>Achillea>, Cyperaceae/Juncaceae, Leguminosae (<em>Anthyllis>, Rosaceae, and Labiatae (<em>Prunella>, <em>Stachys> formed the bulk of marmot diet in the study areas. Diet showed low diversity considering the abundance of plant species in the surrounding environment. Food resources were probably used in relation to their easy digestibility, with a high content in proteins, sugar and water. The knowledge of vegetation features in relation to marmot trophic habits can represent a useful tool for the management of this species. Riassunto Il regime alimentare di due gruppi di Marmotta alpina è stato studiato in giugno-settembre 2001 in due aree delle Dolomiti agordine (SE Italia, attraverso l’analisi microscopica delle feci e l’osservazione diretta dell’attività alimentare. Durante tutto il periodo di attività si è notato un forte consumo di Angiosperme, specialmente piante a fiore, mentre le ”graminoidi” sembra giochino un ruolo importante all’inizio della stagione. In generale le parti vegetali predominano sui fiori. L’ingestione di prede animali non è stata

  19. Do Surrealismo em David Lynch

    Directory of Open Access Journals (Sweden)

    Mirian Tavares

    2009-01-01

    Full Text Available O surrealismo, como a arte do seu tempo, propõe uma nova estética, capaz de extrair o belo do absurdo e de instaurar o desvio para que daí surja, de fato, o real. Através da análise de algumas obras de David Lynch e dos livros Les champs magnétiques de Breton e Philippe Soupault e Poisson soluble, de Breton, irei mostrar a pertinência da designação surrealista para a obra do cineasta norte-americano. Lynch, como os surrealistas, constrói uma operação dialética entre o racional/irracional. Ao mesmo tempo em que opera no campo artístico em direção à irracionalidade absoluta, Lynch não nega a sua inserção na sociedade. Acredito que o realizador, como os surrealistas, tenha conseguido encontrar um equilíbrio entre as duas formas de se estar no mundo, racional/irracional, jogando com suas antíteses. O prazer do jogo surrealista consiste em ir até as profundezas do inconsciente e retornar com matéria suficiente para fazer uma obra de arte.Surrealism, as the art of its time, proposes a new aesthetics, one that is able to extract the beautiful from the absurd and to establish the swerve from the standard, from which, in fact, the real comes through. Through the analysis of some works by David Lynch, of Breton and Soupault's Les champs magnétiques, and of Breton's Poisson soluble, I will attempt to show the relevance of the surrealist designation for the work of the American filmmaker. Lynch, like the surrealists, builds a dialectic operation between the rational and the irrational. While operating in the artistic field towards absolute irrationality, Lynch does not deny its role in society. It is my belief that the director, as the surrealists, has managed to find a balance between the two ways of being in the world: rational and irrational; by playing with their antitheses. The pleasure of the surrealist game is to go to the depths of the unconscious and return with sufficient material to make a work of art out of it.

  20. <em>luxS> Mutant Regulation: Quorum Sensing Impairment or Methylation Disorder?

    Directory of Open Access Journals (Sweden)

    Zhengwei Huang

    2012-05-01

    Full Text Available AI-2–mediated quorum sensing has been identified in various bacteria, including both Gram-negative and Gram-positive species, and numerous phenotypes have been reported to be regulated by this mechanism, using the <em>luxS>-mutant strain. But the AI-2 production process confused this regulatory function; some considered this regulation as the result of a metabolic change, which refers to an important metabolic cycle named activated methyl cycle (AMC, caused by<em> luxSem>-mutant simultaneously with the defect of AI-2. Herein we hypothesized that the quorum sensing system—not the metabolic aspect—is responsible for such a regulatory function. In this study, we constructed plasmids infused with<em> sahHem> and induced protein expression in the <em>luxS>-mutant strain to make the quorum-sensing system and metabolic system independent. The biofilm-related genes were investigated by real-time polymerase chain reaction (PCR, and the results demonstrated that the quorum-sensing completed strain restored the gene expression of the defective strain, but the metabolically completed one did not. This evidence supported our hypothesis that the autoinducer-2-mediated, quorum-sensing system, not the AMC, was responsible for <em>luxS> mutant regulation.

  1. <em>Emaravirus>: A Novel Genus of Multipartite, Negative Strand RNA Plant Viruses

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    Hans-Peter Mühlbach

    2012-09-01

    Full Text Available Ringspot symptoms in European mountain ash (<em>Sorbus aucupariaem> L., fig mosaic, rose rosette, raspberry leaf blotch, pigeonpea sterility mosaic (<em>Cajanus cajanem> and High Plains disease of maize and wheat were found to be associated with viruses that share several characteristics. They all have single-stranded multipartite RNA genomes of negative orientation. In some cases, double membrane-bound virus-like particles of 80 to 200 nm in diameter were found in infected tissue. Furthermore, at least five of these viruses were shown to be vectored by eriophyid mites. Sequences of <em>European mountain ash ringspot-associated virusem> (EMARaV, <em>Fig mosaic virusem> (FMV, rose rosette virus (RRV, raspberry leaf blotch virus (RLBV, pigeonpea sterility mosaic virus and High Plains virus strongly support their potential phylogenetic relationship. Therefore, after characterization of EMARaV, the novel genus <em>Emaravirus> was established, and FMV was the second virus species assigned to this genus. The recently sequenced RRV and RLBV are supposed to be additional members of this new group of plant RNA viruses.

  2. Registro periodontal simplificado em gestantes

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    Fernanda L. Rosell

    1999-04-01

    Full Text Available OBJETIVO: Avaliar através do PSR (Registro Periodontal Simplificado a prevalência, severidade e necessidades básicas de tratamento da doença periodontal em gestantes que freqüentaram a Clínica de Prevenção da Faculdade de Odontologia de Araraquara ­ UNESP. MÉTODOS: Foram examinadas 41 gestantes com idades que variaram de 16 a 37 anos. O PSR foi aplicado com auxílio de uma sonda especialmente recomendada para este exame (sonda Trinity - tipo 621 OMS, indicando os códigos 0 a 4 cujos critérios identificam de saúde gengival, sangramento, cálculo, bolsa periodontal rasa e profunda. Estes foram atribuídos a cada sextante, podendo ou não estarem associados a um asterisco (* diante da presença de recessão gengival, invasão de furca, mobilidade ou alterações muco-gengivais. RESULTADOS: Demonstraram que 100% das gestantes apresentaram alguma alteração gengival, sendo os códigos 2 (56,1% e o * (19,5% os mais prevalentes. Os grupos etários de 15-19 e 20-24 anos, apresentaram o código 2 como maior escore e ausência de sextante excluído (X. A partir do grupo de 25-29 anos, além da maior prevalência ainda ser do código 2 (54,5%, ocorreram os códigos 3 e 4 (bolsa periodontal. Os códigos * e sextante excluído (X tenderam a aumentar com a idade no grupo de 30-37 anos. De modo geral, os códigos 1 e 2, prevaleceram em relação ao percentual de sextantes afetados, correspondendo a 41,6% e 39,8%, respectivamente e afetando 2,49 e 2,39 sextantes, em média, por gestante. Em relação às necessidades de tratamento, 90,2% das gestantes necessitaram tratamentos adicionais aos preventivos, ou seja, 61,0% das gestantes necessitaram de raspagem e alisamento radicular e/ou eliminar margens de restaurações defeituosas e 29,2% de tratamento complexo. CONCLUSÃO: O atendimento às necessidades de tratamento na gravidez deve receber especial atenção com o intuito de se promover saúde bucal e motivação, e conseqüentemente, contribuir

  3. Registro periodontal simplificado em gestantes

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    Rosell Fernanda L.

    1999-01-01

    Full Text Available OBJETIVO: Avaliar através do PSR (Registro Periodontal Simplificado a prevalência, severidade e necessidades básicas de tratamento da doença periodontal em gestantes que freqüentaram a Clínica de Prevenção da Faculdade de Odontologia de Araraquara ­ UNESP. MÉTODOS: Foram examinadas 41 gestantes com idades que variaram de 16 a 37 anos. O PSR foi aplicado com auxílio de uma sonda especialmente recomendada para este exame (sonda Trinity - tipo 621 OMS, indicando os códigos 0 a 4 cujos critérios identificam de saúde gengival, sangramento, cálculo, bolsa periodontal rasa e profunda. Estes foram atribuídos a cada sextante, podendo ou não estarem associados a um asterisco (* diante da presença de recessão gengival, invasão de furca, mobilidade ou alterações muco-gengivais. RESULTADOS: Demonstraram que 100% das gestantes apresentaram alguma alteração gengival, sendo os códigos 2 (56,1% e o * (19,5% os mais prevalentes. Os grupos etários de 15-19 e 20-24 anos, apresentaram o código 2 como maior escore e ausência de sextante excluído (X. A partir do grupo de 25-29 anos, além da maior prevalência ainda ser do código 2 (54,5%, ocorreram os códigos 3 e 4 (bolsa periodontal. Os códigos * e sextante excluído (X tenderam a aumentar com a idade no grupo de 30-37 anos. De modo geral, os códigos 1 e 2, prevaleceram em relação ao percentual de sextantes afetados, correspondendo a 41,6% e 39,8%, respectivamente e afetando 2,49 e 2,39 sextantes, em média, por gestante. Em relação às necessidades de tratamento, 90,2% das gestantes necessitaram tratamentos adicionais aos preventivos, ou seja, 61,0% das gestantes necessitaram de raspagem e alisamento radicular e/ou eliminar margens de restaurações defeituosas e 29,2% de tratamento complexo. CONCLUSÃO: O atendimento às necessidades de tratamento na gravidez deve receber especial atenção com o intuito de se promover saúde bucal e motivação, e conseqüentemente, contribuir

  4. Soybean breeding with EMS mutagenesis

    International Nuclear Information System (INIS)

    Gu Aiqiu; Geng Yuxuan; Zhu Baogo

    1990-01-01

    Full text: 'Yudou No. 2' is a good soybean variety grown in the Honan Province. EMS was applied to seeds and valuable mutants were selected among the descendants. In a short period, several genetically stable strains were obtained. In the M 2 population, the early-maturing mutants were the most frequent, followed by short culm mutants. Other mutations altered leaf shape, grain size, habit of pod bearing, number of pods etc. One of the best strains is '86-180'. It is highly disease-resistant and ripens 19 days earlier than the original 'Yodou No. 2'. It bears more pods, although the seeds are a little bit smaller and is highly productive (4110kg/ha). Another good strain is '86-223'. It is also disease-resistant and highly productive (3390kg/ha). (author)

  5. Novas perspectivas em vacinas virais

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    Schatzmayr Hermann G.

    2003-01-01

    Full Text Available Com base nas pesquisas moleculares sobre o genoma e proteínas, novas vacinas virais deverão ser utilizadas de forma rotineira nas próximas décadas. Por outro lado, espera-se que cada vez mais sejam associados diferentes antígenos imunizantes em uma mesma dose, visando a reduzir o número de aplicações de vacinas nas populações a serem imunizadas. Pela importância de sua estrutura científica e tecnológica, o Brasil deve aumentar a participação nos processos de desenvolvimento de novas vacinas e na avaliação de sua eficácia, envolvendo maior número de pesquisadores e tecnologistas, com o incremento de investimento nessas atividades.

  6. Mastites em ruminantes no Brasil

    OpenAIRE

    Acosta, Atzel Candido; Silva, Leonildo Bento Galiza da; Medeiros, Elizabeth Sampaio; Pinheiro-Júnior, José Wilton; Mota, Rinaldo Aparecido

    2016-01-01

    Resumo: A mastite é uma doença complexa e considerada uma das principais causas de perdas à indústria leiteira mundial. Objetivou-se com esta revisão compilar informações dos últimos dez anos sobre a mastite em ruminantes no Brasil. A prevalência da mastite subclínica chega a 48,64% na espécie bovina, 30,7% na espécie caprina, 31,45% na espécie ovina e 42,2% na espécie bubalina, destacando-se a etiologia por Staphylococcus spp. Os fatores de risco associados à ocorrência de mastite estão rela...

  7. Qualidade de Vida em Cardiologia

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    Eliane Roseli Winkelmann

    2008-06-01

    Full Text Available A busca de qualidade de vida vem assumindo um papel importante dentro da área da saúde e é uma das metas dentro da cardiologia preventiva e terapêutica. Este artigo teve como propósito realizar uma revisão da literatura na qualidade de vida em cardiologia, enfocando as principais concepções, métodos de mensuração e mudanças clínicas significativas. Observa-se a neces-sidade de mais pesquisas dentro desta área através de mensurações cuidadosamente selecionadas, sendo de grande relevância para o paciente e para o profissional responsável pela saúde do mesmo.

  8. Echolocation calls and morphology in the Mehelyi’s (<em>Rhinolophus mehelyiem> and mediterranean (<em>R. euryaleem> horseshoe bats: implications for resource partitioning

    Directory of Open Access Journals (Sweden)

    Egoitz Salsamendi

    2006-03-01

    Full Text Available Abstract <em>Rhinolophus euryaleem> and <em>R. mehelyiem> are morphologically very similar species and their distributions overlap extensively in the Mediterranean basin. We modelled their foraging behaviour using echolocation calls and wing morphology and, assuming niche segregation occurs between the two species, we explored how it is shaped by these factors. Resting frequency of echolocation calls was recorded and weight, forearm length, wing loading, aspect ratio and wing tip shape index were measured. <em>R. mehelyiem> showed a significantly higher resting frequency than <em>R. euryaleem>, but differences are deemed insufficient for dietary niche segregation. Weight and forearm length were significantly larger in <em>R. mehelyiem>. The higher values of aspect ratio and wing loading and a lower value of wing tip shape index in <em>R. melehyiem> restrict its flight manoeuvrability and agility. Therefore, the flight ability of <em>R. mehelyiem> may decrease as habitat complexity increases. Thus, the principal mechanism for resource partitioning seems to be based on differing habitat use arising from differences in wing morphology. Riassunto Ecolocalizzazione e morfologia nei rinolofi di Mehely (<em>Rhinolophus mehelyiem> e euriale (<em>R. euryaleem>: implicazioni nella segregazione delle risorse trofiche. <em>Rhinolophus euryaleem> e <em>R. mehelyiem> sono specie morfologicamente molto simili, la cui distribuzione risulta largamente coincidente in area mediterranea. Il comportamento di foraggiamento delle due specie è stato analizzato in funzione delle caratteristiche dei segnali di ecolocalizzazione e della morfologia alare, ed è stata valutata l’incidenza di questi fattori nell’ipotesi di una segregazione delle nicchie. È stata rilevata la frequenza a riposo dei segnali ultrasonori, così come il peso, la lunghezza dell’avambraccio, il carico alare, e due

  9. decidual em itaara, RS, Brasil

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    Hamilton Luiz Munari Vogel

    2007-01-01

    Full Text Available O presente trabalho foi realizado na fazenda da Brigada Militar no município de Itaara, RS, Brasil, e teve como principal objetivo avaliar a devolução de serapilheira em uma Floresta Estacional Decidual. Para a coleta de serapilheira, foram demarcadas seis parcelas de 25 m x 17 m cada, alocadas no interior da floresta. Em cada parcela, foram distribuídos cinco coletores, totalizando 30 coletores, constituídos por uma moldura de ferro de forma circular, com 50 cm de diâmetro. As coletas de serapilheira foram realizadas mensalmente, durante um período de 2 anos. No laboratório, o material foi separado nas frações folhas, galhos finos (< 1 cm e miscelânea (flores, frutos, sementes e restos vegetais não-identificáveis. Nos dois anos de coleta, houve grande devolução de serapilheira no início do inverno e principalmente na primavera, aumentando nos meses de setembro e novembro, no primeiro ano. No segundo ano, apesar da menor devolução mensal, essa tendência manteve-se mais ou menos constante, indicando um padrão sazonal nessa floresta. A devolução média anual de serapilheira foi de 7436,0 kg ha-1, com uma distribuição relativa de 71,7% de folhas, 16,5% de galhos finos e 11,8% de miscelânea. Não foi verificada uma correlação significativa entre as variáveis climáticas precipitação e temperatura e a devolução de serapilheira.

  10. PODER DA VOZ EM MEDEIA

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    Tércia Montenegro Lemos

    2016-01-01

    Full Text Available Este artigo se debruça sobre a peça teatral Medeia, de Eurípides, vista em diálogo com algumas de suas retextualizações forjadas ao longo dos tempos, incluindo-se em nosso corpus de análise a obra Medée, do dramaturgo francês Jean Anouilh, e Gota d’água, peça brasileira criada por Chico Buarque e Paulo Pontes. Partindo do trabalho de Romilly (1975, buscamos demonstrar como tragédia e retórica são interdependentes na composição das citadas obras, sobretudo pela carga dramática das falas das personagens. Para tanto, estabelecemos um diálogo entre a retórica antiga e o moderno conceito de etos, tal como a Análise do discurso de linha francesa o entende. A categoria do etos contribui de modo importante para estabelecer fronteiras entre as variantes literárias do mito e possibilita reflexões sobre os procedimentos de intertextualidade adotados. Após as análises, observamos como o investimento da enunciação se expõe através do poder da voz nas versões de Medeia, criando um poderoso efeito psicológico para compor o perfil da protagonista.Palavras-chave: Tragédia; Retórica; Análise do discurso.

  11. Poder da voz em MEDEIA

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    Tércia Montenegro Lemos

    2016-01-01

    Full Text Available Este artigo se debruça sobre a peça teatral Medeia, de Eurípides, vista em diálogo com algumas de suas retextualizações forjadas ao longo dos tempos, incluindo-se em nosso corpus de análise a obra Medée, do dramaturgo francês Jean Anouilh, e Gota d’água, peça brasileira criada por Chico Buarque e Paulo Pontes. Partindo do trabalho de Romilly (1975, buscamos demonstrar como tragédia e retórica são interdependentes na composição das citadas obras, sobretudo pela carga dramática das falas das personagens. Para tanto, estabelecemos um diálogo entre a retórica antiga e o moderno conceito de etos, tal como a Análise do discurso de linha francesa o entende. A categoria do etos contribui de modo importante para estabelecer fronteiras entre as variantes literárias do mito e possibilita reflexões sobre os procedimentos de intertextualidade adotados. Após as análises, observamos como o investimento da enunciação se expõe através do poder da voz nas versões de Medeia, criando um poderoso efeito psicológico para compor o perfil da protagonista.Palavras-chave: Tragédia; Retórica; Análise do discurso.

  12. Training for Defense? From Stochastic Traits to Synchrony in Giant Honey Bees (<em>Apis dorsataem>

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    Gerald Kastberger

    2012-08-01

    Full Text Available In Giant Honey Bees, abdomen flipping happens in a variety of contexts. It can be either synchronous or cascaded, such as in the collective defense traits of shimmering and rearing-up, or it can happen as single-agent behavior. Abdomen flipping is also involved in flickering behavior, which occurs regularly under quiescent colony state displaying singular or collective traits, with stochastic, and (semi- synchronized properties. It presumably acts via visual, mechanoceptive, and pheromonal pathways and its goals are still unknown. This study questions whether flickering is preliminary to shimmering which is subject of the <em>fs em>(flickering-shimmering-transition> hypothesis? We tested the respective prediction that trigger sites (<em>ts> at the nest surface (where shimmering waves had been generated show higher flickering activity than the alternative non-trigger sites (<em>nts>. We measured the flickering activity of <em>ts>- and <em>nts>-surface bees from two experimental nests, before and after the colony had been aroused by a dummy wasp. Arousal increased rate and intensity of the flickering activity of both <em>ts>- and <em>nts> cohorts (P < 0.05, whereby the flickering intensity of <em>ts>-bees were higher than that of <em>nts>-bees (P < 0.05. Under arousal, the colonies also increased the number of flickering-active <em>ts>- and <em>nts>-cohorts (P < 0.05. This provides evidence that cohorts which are specialist at launching shimmering waves are found across the quiescent nest zone. It also proves that arousal may reinforce the responsiveness of quiescent curtain bees for participating in shimmering, practically by recruiting additional trigger site bees for expanding repetition of rate and intensity of shimmering waves. This finding confirms the <em>fs-transition> hypothesis and constitutes evidence that flickering is part of a basal colony-intrinsic information system

  13. Cytotoxicity and Glycan-Binding Properties of an 18 kDa Lectin Isolated from the Marine Sponge <em>Halichondria em>okadai>

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    Yasuhiro Ozeki

    2012-04-01

    Full Text Available A divalent cation-independent lectin—HOL-18, with cytotoxic activity against leukemia cells, was purified from a demosponge, <em>Halichondria okadaiem>. HOL-18 is a 72 kDa tetrameric lectin that consists of four non-covalently bonded 18 kDa subunits. Hemagglutination activity of the lectin was strongly inhibited by chitotriose (GlcNAcβ1-4GlcNAcβ1-4GlcNAc, fetuin and mucins from porcine stomach and bovine submaxillary gland. Lectin activity was stable at pH 4–12 and temperatures lower than 60 °C. Frontal affinity chromatography with 16 types of pyridylaminated oligosaccharides indicated that the lectin had an affinity for <em>N>-linked complex-type and sphingolipid-type oligosaccharides with <em>N>-acetylated hexosamines and neuramic acid at the non-reducing termini. The lectin killed Jurkat leukemia T cells and K562 erythroleukemia cells in a dose- and carbohydrate-dependent manner.

  14. Qualidade do ar em ambientes internos hospitalares

    OpenAIRE

    Quadros, Marina Eller

    2008-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Ambiental. A qualidade de vida das pessoas é grandemente influenciada pela qualidade do ar que respiram. Em centros urbanos, mais de 80% do tempo é passado em ambientes internos. No caso específico de unidades de saúde, a qualidade do ar pode exercer influência direta no tempo de recuperação dos pacientes e na ocorrência de infecções hospitalares. O objetivo deste tr...

  15. O Trabalho Plurativo em Presidente Prudente

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    Sandro Mauro Guirro

    2011-11-01

    Full Text Available Atualmente, vêm ocorrendo mudanças no campo brasileiro, principalmente nas  propriedades localizadas próximas a malha urbana da cidade. Esse processo se verifica com mais intensidade em cidades como Campinas, Sorocaba, Jundiaí entre outras cidades próximas aos grandes centros urbanos. Em Presidente Prudente, esse processo dá sinais de existência em resposta à crise pela qual vem passando, sobretudo a pequena agricultura. Está-se diante da intensificação das mudanças de funções do trabalho inserido na lavra agrária.

  16. ESPECIFICANDO FORMALMENTE TOPOLOGIAS PARA REDES EM CHIP

    OpenAIRE

    Santos, Eliselma Vieira dos; Ramos, Karla Darlene Nepomuceno

    2012-01-01

    Este artigo trata da utilização de métodos formais na especificação de topologias para redes em chip. As redes em chip apresentam similaridades com as redes tradicionais, entretanto, por estarem inseridas em sistemas embarcados apresentam características mais restritivas do ponto de vista de espaço, consumo de energia e latência. A topologia descreve o fluxo de dados através da rede e a estrutura física de como os dispositivos estão conectados, bem como, pode determinar o grau de escalabilid...

  17. Supercondutividade em materiais a base de carbono

    OpenAIRE

    Rafael Borges Merlo

    2011-01-01

    Resumo: Evidências experimentais e teóricas recentes de que a supercondutividade nas várias formas alotrópicas do carbono pode ocorrer em temperaturas próximas ou até acima da temperatura ambiente, desencadearam um grande interesse científico. Resultados do presente trabalho demonstraram a ocorrência de supercondutividade em compósitos de carbono vítreo-enxofre (CV-S) a T = 3 K. Nossas medidas revelaram que a supercondutividade ocorre em uma pequena fração da amostra, e que a grafitização do ...

  18. Caracteristicas das leucemias agudas em Teresina

    OpenAIRE

    Monica Fortes Napoleão do Rego

    2002-01-01

    Resumo: Variações na distribuição da idade, sexo e tipos FAB têm sido descrita em vários países. Neste trabalho avaliaram-se as características clínicas e resposta ao tratamento da LMA e LLA de Teresina entre 1989 e 2000 e comparamos esses resultados com outros descritos no Brasil e em outros países. Dados clínicos e laboratoriais de 345 pacientes (230 com LLA e 115 com LMA) foram revisados. LMA ocorreu predominantemente em adultos (77%). A mediana de idade foi de 34 anos, semelhante ao que s...

  19. Ondas de spin em redes decoradas

    OpenAIRE

    WanÃssa FaÃanha da Silva

    2014-01-01

    Sistema de baixa dimensionalidade tÃm atraÃdo uma grande atenÃÃo ultimamente devido a sistemas como grafeno e nanotubos de carbono. Tais sistemas tÃm grandes possibilidades de aplicaÃÃes tecnolÃgicas, em particular na criaÃÃo de dispositivos eletrÃnicos, devido Ãs suas propriedades eletrÃnicas especÃficas. Nesse sentido, o estudos de outros sistemas em baixa dimensÃo se torna urgente. Mais especificamente, o estudo de propriedades magnÃticas de materiais de materiais em baixa dimensionalidade...

  20. Religiosidade em alunos e professores portugueses

    OpenAIRE

    Ferreira, Ana Maria Mendes dos Santos Veríssimo

    2005-01-01

    Tese de Doutoramento em Ciências da Educação na especialidade de Educação Intercultural apresentada à Universidade Aberta Esta tese pretende analisar a religiosidade em alunos e professores, sendo a religiosidade entendida como o grau de ligação ou aceitação que cada indivíduo tem face à instituição religiosa (Alston, 1875) e à forma como põe em prática as crenças e os rituais (Shafranske e Malony, 1990). Para medir a religiosidade foram utilizados diversos instrumentos – a escala de Atitu...

  1. Candomblé - discurso em transe

    OpenAIRE

    Mario Moraes

    2012-01-01

    Utilizando como objeto de análise o discurso, numa perspectiva baseada em Foucault, Bakhtin, Fairclough e outros, este estudo busca entender como o transe se contstitui ritualmente e como a sua produção é formadora da vivencia religiosa no candomblé e também formadora do que as pessoas entendem como candomblé e do que o candomblé é em si mesmo. Questionando a leigos sobre o que mais se espera ver em um terreiro de candomblé, a resposta quase unanime é "a possessão". Como mais de uma re...

  2. Mastite em pequenos ruminantes no Brasil

    OpenAIRE

    Peixoto,Rodolfo de M.; Mota,Rinaldo Aparecido; Costa,Mateus M. da

    2010-01-01

    Este artigo objetivou revisar as informações recentes sobre mastite em pequenos ruminantes, abrangendo etiologia, epidemiologia, aspectos de controle e profilaxia. Houve a preocupação em reunir resultados de estudos desenvolvidos no Brasil, uma vez que a mastite tem a interferência de uma série de fatores, como fatores ambientais e outros decorrentes dos sistemas de manejo empregados, condições essas determinantes para etiologia e epidemiologia da enfermidade. A prevalência da mastite em capr...

  3. ANION GAP NO SANGUE VENOSO EM EQUINOS

    Directory of Open Access Journals (Sweden)

    Luís Carlos Ribeiro Fan

    1994-01-01

    Full Text Available RESUMO A influência do sangue venoso na determinação do anion gap foi estudada em 50 equinos adultos clinicamente sadios no município de Santa Maria, RS. Os resultados obtidos em mEq/1 foram: sódio 140 ± 2,0; potássio 4,2 ± 0,5; cloreto 102 ± 12 e bicarbonato 26,9 ± 2,0. Conclui-se que o sangue venoso pode substituir o arterial na determinação do anion gap em equinos.

  4. 7 CFR 1945.35 - Special EM loan training.

    Science.gov (United States)

    2010-01-01

    ..., District and County employees, provided there has not been a recent training meeting in that State. (b... County personnel properly trained in the current methods of processing EM loan applications and EM loan... employees in administering the EM loan program. (d) Comprehensive EM loan training package. A comprehensive...

  5. Metabolic Profiling of <em>Lactococcus lactisem> Under Different Culture Conditions

    Directory of Open Access Journals (Sweden)

    Normah Mohd Noor

    2012-07-01

    Full Text Available Gas chromatography mass spectrometry (GC-MS and headspace gas chromatography mass spectrometry (HS/GC-MS were used to study metabolites produced by <em>Lactococcus lactisem> subsp. <em>cremoris> MG1363 grown at a temperature of 30 °C with and without agitation at 150 rpm, and at 37 °C without agitation. It was observed that <em>L. lactisem> produced more organic acids under agitation. Primary alcohols, aldehydes, ketones and polyols were identified as the corresponding trimethylsilyl (TMS derivatives, whereas amino acids and organic acids, including fatty acids, were detected through methyl chloroformate derivatization. HS analysis indicated that branched-chain methyl aldehydes, including 2-methylbutanal, 3-methylbutanal, and 2-methylpropanal are degdradation products of isoleucine, leucine or valine. Multivariate analysis (MVA using partial least squares discriminant analysis (PLS-DA revealed the major differences between treatments were due to changes of amino acids and fermentation products.

  6. Feeding habits of the genet <em>Genetta genettaem> in an Iberian continental wetland

    Directory of Open Access Journals (Sweden)

    Maite Sánchez

    2009-02-01

    Full Text Available Abstract This study quantified the diet of the genet <em>Genetta genettaem> in an Iberian continental wetland, the Galachos Nature Reserve, northern Spain, based on the frequency with which items appeared in five monthly-surveyed latrines during 2004-2005. Prey types were identified <em>de visuem> using identification keys and expert advice. the genet was confirmed as an opportunistic and generalist predator, its diet including mammals (95.0%, plants (68.3% and arthropods (60.0% as main prey. With the exception of a newly available prey species, the alien crayfish <em>Procambarus clarkiiem>, the genet probably consumed arthropods because of chance encounters rather than active search. The consumption of fruits and small mammals varied seasonally. Riassunto Alimentazione della genetta <em>Genetta genettaem> in un'area umida continentale della penisola iberica La dieta della genetta è stata investigata in un'area umida interna della Spagna settentrionale, la riserva Naturale dei Galachos. La frequenza di ciascuna categoria alimentare è stata espressa come numero di occorrenze mansili in cinque latrine monitorate per il periodo 2004-2005. Le categorie sono state identificate <em>de visuem> tramite chiavi per il riconoscimento o l'intervento di singoli esperti. I risultati confermano il comportamento alimentare generalista e opportunista della genetta. La dieta ha incluso principalmente mammiferi (95%, vegetali (68.3% e artropodi (60%. Questi ultimi, con l'eccezione del gambero <em>Procambarus clarkiiem>, introdotto e di recente presenza, sono probabilmente utilizzati in modo opportunistico, piuttosto che in seguito a ricerca attiva. L'uso dei frutti e dei micromammiferi varia stagionalmente.

  7. Comparação de custos entre os processos construtivos em concreto armado e em alvenaria estrutural em blocos cerâmico e de concreto

    OpenAIRE

    Silva, Alisson Hoffmann da

    2002-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Civil. Questiona-se a viabilidade econômica do processo construtivo em alvenaria estrutural em relação ao processo construtivo em concreto armado. Entre as obras em alvenaria estrutural, a indagação ocorre sobre qual tipo de unidade, de cerâmica ou de concreto, produz resultados mais efetivos em termos de custos. Este trabalho teve o objetivo de comparar o custo de ...

  8. A Favela posta em Cena

    Directory of Open Access Journals (Sweden)

    Fabiana Valdoski Ribeiro

    2010-08-01

    Full Text Available Em uma realidade de urbanização calcada no aprofundamento dos processos de expropriação e espoliações se consolida o fenômeno da produção de uma morfologia intitulada Favela, que continua a representar um desafio teórico e prático para pesquisadores. Este desafio é enfrentado de várias formas sendo uma delas desenhada no âmbito de duas publicações do Observatório das Favelas (Rio de Janeiro assentadas na busca conceitual do termo favela e objetivando a efetivação de políticas públicas. Esta meta remonta a trajetória deste Observatório que criado em 2001 pensa a inserção da Favela no âmbito das políticas de Estado. A primeira publicação intitulada “Favela: alegria e dor na cidade” (2005 se compõem de quatro capítulos que expõem um movimento da história de formação das favelas na cidade do Rio de Janeiro, as formas de intervenção do Estado, a prática cotidiana dos moradores como manifestação das transgressões diante as opressões e finaliza com as propostas de caminhos possíveis de superação das desigualdades e ampliação da democracia. O argumento central dos autores se direciona para o questionamento das visões de homogeneidade, ausência, carência e apartamento das favelas diante da cidade apontando a urgência de construção de um projeto de cidade democrático e fraterno.Ao longo do texto os autores vão descrevendo os exemplos destas visões e analisa o resultado delas por meio de como a população residente vive, pois são ora invisíveis, ora criminalizados, ora caracterizados enquanto um problema social estabelecendo, portanto, uma lógica autoritária que legitimará no decorrer da história das favelas, as intervenções estatais. Este movimento molda uma linha argumentativa que tenta explicitar o negativo diante a produção possível para o “morar’, que calcado na impossibilidade do acesso à terra pelo imperativo da propriedade privada empurra grandes contingentes populacionais

  9. Complete BWR--EM LOCA analysis using the WRAP--EM system

    International Nuclear Information System (INIS)

    Beckmeyer, R.R.; Gregory, M.V.; Buckner, M.R.

    1979-01-01

    The Water Reactor Analysis Package, Evaluation Model (WRAP--EM), provides a complete analysis of postulated loss-of-coolant accidents (LOCA's) in light--water nuclear power reactors. The system is being developed at the Savannah River Laboratory (SRL) for use by the Nuclear Regulatory Commission (NRC) to interpret and evaluate reactor vendor, evaluation model (EM) analyses. The initial version of the WRAP--EM system for analysis of boiling water reactors (BWR's) is operational. To demonstrate the complete capability of the WRAP--BWR--EM system, a LOCA analysis has been performed for the Hope Creek Plant

  10. Comportamento ingestivo de vacas em lactação em diferentes sistemas forrageiros

    OpenAIRE

    Olivo,Clair Jorge; Ziech,Magnos Fernando; Meinerz,Gilmar Roberto; Both,José Francisco; Agnolin,Carlos Alberto; Vendrame,Tiago

    2008-01-01

    Estudou-se o comportamento alimentar de vacas da raça Holandesa em lactação mantidas em pastagem de misturas de espécies de capim-elefante (Pennisetum purpureum Schum.), azevém (Lolium multiflorum Lam.) e outras de crescimento espontâneo. Como diferencial destas pastagens, introduziu-se trevo-branco (Trifolium repens L.) ou amendoim forrageiro (Arachis pintoi Krapov. & Greg.). Nos meses de julho, agosto e outubro de 2005, foram feitas avaliações em pastejo utilizando-se em cada uma seis v...

  11. Two New Aryltetralin Lignans from the Roots of <em>Dolomiaea soulieiem>

    Directory of Open Access Journals (Sweden)

    Sen Zhang

    2012-05-01

    Full Text Available Two new aryltetralin-type lignans, dolomiaeasin A (1 and dolomiaeasin B (2, were isolated from the roots of <em>Dolomiaea soulieiem>. Their structures were elucidated by means of various spectroscopic analyses. The cytotoxicities of 1 and 2 were tested by the MTT method, and both compounds showed no significant cytotoxic activities against the A549 and A2780 human cancer cell lines. This is the first time that aryltetralin-type lignans were isolated from the genus <em>Dolomiaea>.

  12. Synthesis and Sensory Evaluation of <em>ent>-Kaurane Diterpene Glycosides

    Directory of Open Access Journals (Sweden)

    Venkata Sai Prakash Chaturvedula

    2012-07-01

    Full Text Available Catalytic hydrogenation of the three <em>ent>-kaurane diterpene glycosides isolated from <em>Stevia rebaudianaem>, namely rubusoside, stevioside, and rebaudioside-A has been carried out using Pd(OH2 and their corresponding dihydro derivatives have been isolated as the products. Synthesis of reduced steviol glycosides was performed using straightforward chemistry and their structures were characterized on the basis of 1D and 2D NMR spectral data and chemical studies. Also, we report herewith the sensory evaluation of all the reduced compounds against their corresponding original steviol glycosides and sucrose for the sweetness property of these molecules.

  13. Probióticos em avicultura

    Directory of Open Access Journals (Sweden)

    Gil de los Santos João Rodrigo

    2005-01-01

    Full Text Available Durante os últimos anos, o incremento de toxinfecções alimentares em humanos pela ingestão de produtos avícolas contaminados com bactérias, sugeriu que produtos oriundos de aves portadoras dessas bactérias podem veiculá-las ao consumidor, provocando doenças entéricas em humanos. Essas observações e a restrição, por parte do mercado consumidor, ao uso de antimicrobianos na produção animal, aumentaram o interesse mundial pelos probióticos e, conseqüentemente, o número de pesquisas realizadas. Esta revisão mostra os avanços e a situação em que se encontram os probióticos em relação à indústria avícola.

  14. More on EM for ML Factor Analysis.

    Science.gov (United States)

    Rubin, Donald B.; Thayer, Dorothy T.

    1983-01-01

    The authors respond to a criticism of their earlier article concerning the use of the EM algorithm in maximum likelihood factor analysis. Also included are the comments made by the reviewers of this article. (JKS)

  15. Qualidade de vida em saúde

    OpenAIRE

    Ribeiro, Zilda

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção. Este trabalho teve como principal objetivo avaliar uma provável contribuição da terapia floral, como prática complementar em saúde, na promoção de uma melhor qualidade de vida em pacientes com doenças crônicas. Como modelo metodológico foi escolhido o estudo de casos retrospectivo com abordagem qualitativa, baseado em registros de prontuários clínicos....

  16. Osteocondromatose em gato: relato de caso

    Directory of Open Access Journals (Sweden)

    S. Winter

    Full Text Available RESUMO A osteocondromatose é caracterizada por nódulos únicos ou múltiplos decorrentes de um crescimento ósseo excessivo benigno. É encontrada em cães, gatos, equinos e humanos. Em felinos, tem maior incidência dos dois aos quatro anos de idade. A etiologia em gatos está relacionada ao vírus da leucemia felina, e também já foi encontrada relação com o fibrossarcoma. A manifestação clínica depende do local acometido e do tamanho da lesão. O diagnóstico definitivo é por meio de histopatologia e o prognóstico é desfavorável, pois ocorrem muitas recidivas. Este relato de caso objetiva descrever a apresentação dessa enfermidade em um felino jovem.

  17. Metadiscurso em entrevista televisiva: um enfoque interacional

    Directory of Open Access Journals (Sweden)

    Clélia Cândida Abreu Spinardi Jubran

    2000-10-01

    Full Text Available Este artigo destaca a presença, em entrevista televisiva, de uma modalidade de procedimento metadiscursivo: a menção a atividades linguageiras prototípicas desse evento comunicativo. Fundamentando-se em uma concepção pragmática de linguagem como ação verbal entre os participantes envolvidos em um ato comunicativo, centra-se em uma perspectiva interacional, com base na qual a referência às atividades linguageiras processadas durante a entrevista será vista como recurso indiciador das relações interpessoais estabelecidas entre entrevistador eentrevistado. Será focalizada especificamente a incidência do estatuto sócio-institucional dos entrevistados no processo interativo desencadeado ao longo da entrevista.

  18. Platelet-Activating Factor (PAF Antagonistic Activity of a New Biflavonoid from <em>Garcinia nervosaem> var. <em>pubescens> King

    Directory of Open Access Journals (Sweden)

    Azura Abdul Ghani

    2012-09-01

    Full Text Available The methanol extract of the leaves of <em>Garcinia nervosaem> var. <em>pubescens> King, which showed strong inhibitory effects on platelet-activating factor (PAF receptor binding, was subjected to bioassay-guided isolation to obtain a new biflavonoid, II-3,I-5, II-5,II-7,I-4',II-4'-hexahydroxy-(I-3,II-8-flavonylflavanonol together with two known flavonoids, 6-methyl-4'-methoxyflavone and acacetin. The structures of the compounds were elucidated by spectroscopic methods. The compounds were evaluated for their ability to inhibit PAF receptor binding to rabbit platelets using 3H-PAF as a ligand. The biflavonoid and acacetin showed strong inhibition with IC50 values of 28.0 and 20.4 µM, respectively. The results suggest that these compounds could be responsible for the strong PAF antagonistic activity of the plant.

  19. O sevofluorano em cadelas gestantes

    Directory of Open Access Journals (Sweden)

    Matsubara Lídia Mitsuko

    2006-01-01

    Full Text Available Com este experimento, objetivou-se avaliar como a anestesia geral inalatória, com o sevofluorano, interfere nos parâmetros fisiológicos de cadelas gestantes. Nove cadelas sem raça definida, adultas, com idade média de três anos, foram submetidas ao mesmo procedimento anestésico em dois períodos distintos, sendo o primeiro na condição não gestante e o segundo aos 45 dias de gestação. Todas receberam acepromazina (0,05mg kg-1 pela via intravenosa como medicação pré-anestésica, propofol (5mg kg-1 pela mesma via e sevofluorano diluído em oxigênio. As variáveis estudadas foram freqüência cardíaca e respiratória, pressão arterial sistólica, média e diastólica, temperatura retal, pressão parcial de CO2 ao final da expiração, saturação de oxigênio nas hemoglobinas, pH sangüíneo, pressão parcial arterial de oxigênio, pressão parcial arterial de CO2, bicarbonato e excesso de base. Os parâmetros foram avaliados antes da medicação pré-anestésica (M0 e 15 minutos após (M1, 15 minutos após a estabilização da anestesia inalatória (M2 e, depois, a cada 15 minutos durante 60 minutos (M3, M4, M5 e M6, com exceção das variáveis hemogasométricas que foram avaliadas em M0, M2 e M6. A análise estatística foi realizada com Análise de Variância e teste de Tukey, sendo considerado o nível de significância de 5%. A freqüência cardíaca elevou-se na paciente gestante no momento basal e 15 minutos após a medicação pré-anestésica, sendo observado ainda diminuição da pressão arterial e da temperatura retal nas gestantes. Os resultados obtidos permitiram concluir que o protocolo anestésico não alterou as variáveis mensuradas neste experimento, podendo ser utilizado com segurança para as cadelas, se houver a necessidade de intervenção cirúrgica e/ou anestésica aos 45 dias de sua gestação.

  20. O cortiço em pauta

    OpenAIRE

    Maia, João Roberto

    2015-01-01

    Este artigo faz um cotejo de posições críticas acerca do romance O cortiço de Aluísio Azevedo, priorizando o confronto entre a leitura dialética de Antonio Candido, em seu ensaio clássico “De cortiço a cortiço”, e outras interpretações recentes da obra em questão.

  1. Isolamento de Corynebacterium aquaticum em leite bubalino

    Directory of Open Access Journals (Sweden)

    Andréa Alice da Fonseca Oliveira

    2005-08-01

    Full Text Available Estudou-se 548 quartos mamários de búfalas, realizando-se exame clínico, CMT para detecção de mastite e coleta de amostras para isolamento bacteriano. Houve crescimento em duas amostras de Corynebacterium aquaticum caracterizadas bioquimicamente. Relata-se a participação do agente como colonizador do úbere e possível causador de mastites em bubalinos.

  2. Comments on theoretical foundation of "EM Drive"

    Science.gov (United States)

    Wu, C.-W.

    2018-03-01

    The concept of EM Drive has attracted much attention and groups of work have been conducted to prove or verify it, of which the published experimental outcome is criticized in great details while the theoretical foundation has not been discussed. The present essay investigates on the theoretical derivations of the net thrust in the "EM drive" and reveals the self-contradiction arising at the very start, when the law of conservation of momentum was utilized and opposed simultaneously.

  3. Em busca do dossel sagrado

    Directory of Open Access Journals (Sweden)

    Rodrigo Portella

    2009-05-01

    Full Text Available O objetivo deste artigo é apresentar algumas teorias de base sociológica que possam explicar o surgimento, em nossa época, de movimentos eclesiais católicos de cunho tradicional, que resgatam estilos de vida religiosa identificados com o passado, ou melhor, com características de uma igreja anterior ao Concílio Vaticano II. A tese central, ainda que como conclusão provisória, é que, num mundo fragmentado e secularizado, pessoas, especialmente jovens, buscam orientação de vida e fé em formas religiosas identificadas com o passado, pois estas ofereceriam segurança e proteção diante de uma sociedade e igreja cada vez mais secularizadas e sem um dossel sagrado determiná-las. Assim, analisamos a tendência pósmoderna de se voltar a costumes, liturgias e doutrinas mais rígidas ou conservadoras, justa e paradoxalmente no intuito de resistir à pós-modernidade ou à racionalidade moderna. Nosso estudo tem como pano de fundo o movimento da Toca de Assis e, até certo ponto, as teorias sociológicas de Peter Berger. Assim, a metodologia deste estudo é a sociológica.Palavras-chave: Igreja Católica; Jovens; Movimentos eclesiais.ABSTRACTThis article aims to present some sociological theories that can explain the present emergence of Catholic ecclesiastical movements of a “traditional” nature, which rescue religious life styles identified with the past, that is, with the Church before Vatican Council II. The central thesis, though inconclusive, is that, in a fragmented and secularized world, people, especially the young, would search for life guidance and faith in religious forms identified with the past, as they would offer security and protection in a society and in a church rendered more and more secular, and deprived of a sacred canopy to define them. Thus, it analyzes the post-modern trend to return to more rigid or conservative habits, liturgies and doctrines, precisely – and paradoxically – as a form of resistance to post

  4. <em>Helicobacter pyloriem> Disrupts Host Cell Membranes, Initiating a Repair Response and Cell Proliferation

    Directory of Open Access Journals (Sweden)

    Hsueh-Fen Juan

    2012-08-01

    Full Text Available <em>Helicobacter pyloriem> (<em>H. pyloriem>, the human stomach pathogen, lives on the inner surface of the stomach and causes chronic gastritis, peptic ulcer, and gastric cancer. Plasma membrane repair response is a matter of life and death for human cells against physical and biological damage. We here test the hypothesis that <em>H. pyloriem> also causes plasma membrane disruption injury, and that not only a membrane repair response but also a cell proliferation response are thereby activated. Vacuolating cytotoxin A (VacA and cytotoxin-associated gene A (CagA have been considered to be major <em>H. pyloriem> virulence factors. Gastric cancer cells were infected with <em>H. pyloriem> wild type (vacA+/cagA+, single mutant (ΔvacA or ΔcagA or double mutant (ΔvacA/ΔcagA strains and plasma membrane disruption events and consequent activation of membrane repair components monitored. <em>H. pyloriem> disrupts the host cell plasma membrane, allowing localized dye and extracellular Ca2+ influx. Ca2+-triggered members of the annexin family, A1 and A4, translocate, in response to injury, to the plasma membrane, and cell surface expression of an exocytotic maker of repair, LAMP-2, increases. Additional forms of plasma membrane disruption, unrelated to <em>H.> pylori em>exposure, also promote host cell proliferation. We propose that <em>H. pyloriem> activation of a plasma membrane repair is pro-proliferative. This study might therefore provide new insight into potential mechanisms of <em>H. pyloriem>-induced gastric carcinogenesis.

  5. Biomass gasification and fuel cells: system with PEM fuel cell; Gaseificacao de biomassa e celula a combustivel: sistema com celula tipo PEMFC

    Energy Technology Data Exchange (ETDEWEB)

    Sordi, Alexandre; Lobkov, Dmitri D.; Lopes, Daniel Gabriel; Rodrigues, Jean Robert Pereira [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Fac. de Engenharia Mecanica], e-mail: asordi@fem.unicamp.br, e-mail: lobkov@fem.unicamp.br, e-mail: danielg@fem.unicamp.br, e-mail: jrobert@fem.unicamp.br; Silva, Ennio Peres da [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Inst. de Fisica Gleb Wataghin], e-mail: Lh2ennio@ifi.unicamp.br

    2006-07-01

    The objective of this paper is to present the operation flow diagram of an electricity generation system based on the biomass integrated gasification fuel cell of the type PEMFC (Proton Exchange Membrane Fuel Cell). The integration between the gasification and a fuel cell of this type consists of the gas methane (CH4) reforming contained in the synthesis gas, the conversion of the carbon monoxide (CO), and the cleaning of the gaseous flow through a PSA (Pressure Swing Adsorption) system. A preliminary analysis was carried out to estimate the efficiency of the system with and without methane gas reforming. The performance was also analyzed for different gasification gas compositions, for larger molar fractions of hydrogen and methane. The system electrical efficiency was 29% respective to the lower heating value of the gasification gas. The larger the molar fraction of hydrogen at the shift reactor exit, the better the PSA exergetic performance. Comparative analysis with small gas turbines exhibited the superiority of the PEMFC system. (author)

  6. Net Energy, CO2 Emission and Land-Based Cost-Benefit Analyses of <em>Jatropha> em>Biodiesel: A Case Study of the Panzhihua Region of Sichuan Province in China

    Directory of Open Access Journals (Sweden)

    Xiangzheng Deng

    2012-06-01

    Full Text Available Bioenergy is currently regarded as a renewable energy source with a high growth potential. Forest-based biodiesel, with the significant advantage of not competing with grain production on cultivated land, has been considered as a promising substitute for diesel fuel by many countries, including China. Consequently, extracting biodiesel from <em>Jatropha> curcasem> has become a growing industry. However, many key issues related to the development of this industry are still not fully resolved and the prospects for this industry are complicated. The aim of this paper is to evaluate the net energy, CO2 emission, and cost efficiency of <em>Jatropha> biodiesel as a substitute fuel in China to help resolve some of the key issues by studying data from this region of China that is well suited to growing <em>Jatropha>. Our results show that: (1 <em>Jatropha> biodiesel is preferable for global warming mitigation over diesel fuel in terms of the carbon sink during <em>Jatropha> tree growth. (2 The net energy yield of <em>Jatropha> biodiesel is much lower than that of fossil fuel, induced by the high energy consumption during <em>Jatropha> plantation establishment and the conversion from seed oil to diesel fuel step. Therefore, the energy efficiencies of the production of <em>Jatropha> and its conversion to biodiesel need to be improved. (3 Due to current low profit and high risk in the study area, farmers have little incentive to continue or increase <em>Jatropha> production. (4 It is necessary to provide more subsidies and preferential policies for <em>Jatropha> plantations if this industry is to grow. It is also necessary for local government to set realistic objectives and make rational plans to choose proper sites for <em>Jatropha> biodiesel development and the work reported here should assist that effort. Future research focused on breading high-yield varieties, development of efficient field

  7. Oficinas da cidade em Fortaleza

    Directory of Open Access Journals (Sweden)

    Cordeiro Andréa Carla de Filgueiras

    2002-01-01

    Full Text Available Este artigo trata do relato de uma experiência de intervenção focal com crianças na cidade de Fortaleza, na qual se procurou, através de discussões em grupo, possibilitar a construção e a re-construção das experiências destes sujeitos na cidade. Partiu-se da premissa que viver hoje na cidade contemporânea requer do sujeito orientação crítica para que ele se situe frente às demandas do viver coletivo. Três momentos de discussão foram focalizados: a reflexão sobre a experiência vivida na cidade; a imaginação sobre as possibilidades deste viver; e a discussão sobre o vivido e o desejado, visando a uma re-construção possível da cidade. As crianças mostraram capacidade de analisar criticamente sua experiência na cidade, apontando os aspectos que, do seu ponto de vista, tornam o viver na cidade particularmente difícil para elas. Mostraram, também, capacidade de indicar caminhos coletivos que suavizariam a tarefa de viver na cidade grande, principalmente quando não se é adulto, e sim criança.

  8. Self: um conceito em desenvolvimento

    Directory of Open Access Journals (Sweden)

    Lídia Suzana Rocha de Macedo

    2012-08-01

    Full Text Available Diversas definições de self coexistem nas teorias e práticas psicológicas. Essa variedade é resultante de bases epistemológicas a partir das quais se adotam estratégias diferentes para abordar e demarcar os limites do objeto em questão e descrevê-lo. Este estudo teve como objetivo oferecer uma revisão dos conceitos de self e uma reflexão sobre como esse conceito se articula nas diferentes abordagens teóricas da psicologia. Destaca-se que dilemas centrais à psicologia do desenvolvimento atravessam o conceito de self. Por essa razão, apresenta-se a tese de que, ao analisar cada definição de self, deve-se buscar responder como cada teoria colocou-se diante das dicotomias estabilidade versus transformação, específico versus universal e mundo interno versus mundo externo.

  9. Actinomicose da Mama em Gestante

    Directory of Open Access Journals (Sweden)

    Mottola Jr Juvenal

    2001-01-01

    Full Text Available A actinomicose mamária é doença inflamatória rara, com poucos casos descritos na literatura. Pode ser primária da mama quando resultante de traumas na pele e papila mamária, e, secundária, quando de origem toracopleural. Sua apresentação clínica é variável, devendo ser diferenciada das doenças mais comuns, dentre elas as mastites e também as neoplasias, como o carcinoma inflamatório. Seu diagnóstico é realizado pela cultura da secreção, com a identificação das colônias de Actinomyces sp. Seu tratamento é a drenagem, quando indicada, a antibioticoterapia endovenosa e manutenção oral por tempo prolongado. Os autores relatam caso de abscesso retromamário por Actinomyces sp. em gestante de 12 semanas que apresentava tumoração mamária expansiva na mama esquerda.

  10. A MENINA EXTRAVIADA EM PIZARNIK

    Directory of Open Access Journals (Sweden)

    Clarisse Lyra (USP

    2013-11-01

    Full Text Available

    em 0px; text-align: justify; line-height: 150%;">Neste texto, a poeta e ensaísta argentina Tamara Kamenszain reflete sobre a poesia da também argentina Alejandra Pizarnik (1936 - 1972. A presença da morte, a escrita do poema como epitáfio, o trânsito de vozes poéticas (eu – tu – ela e a questão de como a assinatura se imbrica com o tema da identidade e com a tradição judaica, são alguns dos aspectos da poética pizarnikiana trazidos à tona pela autora. Além de constituir uma bela leitura da obra dessa escritora singular, o ensaio de Kamenszain apresenta virtudes poéticas próprias.

  11. Literatura e(m hipertexto

    Directory of Open Access Journals (Sweden)

    Bellei, Sérgio Luiz Prado

    2010-01-01

    Full Text Available A crescente hegemonia do modo de produção digital de textos literários a serem disponibilizados em rede torna urgente o questionamento a respeito das possíveis mudanças que ocorrem na produção de hipertextos eletrônicos a partir de textos literários. O presente ensaio desenvolve uma reflexão crítica sobre o problema a partir de uma distinção do duplo significado de tecnologia enquanto, de um lado, instrumental para a produção de objetos e, de outro, ambiente estruturante que não só produz objetos mas, principalmente, molda os sujeitos que deles fazem uso, reconstituindo no processo hábitos e procedimentos. Se levarmos a sério o conceito de tecnologia enquanto ambiente estruturante, então é bem possível que a literatura traduzida ou produzida diretamente no formato hipertextual sofra modificações profundas quando comparadas à produção literária no meio impresso

  12. Mastites em ruminantes no Brasil

    Directory of Open Access Journals (Sweden)

    Atzel Candido Acosta

    Full Text Available Resumo: A mastite é uma doença complexa e considerada uma das principais causas de perdas à indústria leiteira mundial. Objetivou-se com esta revisão compilar informações dos últimos dez anos sobre a mastite em ruminantes no Brasil. A prevalência da mastite subclínica chega a 48,64% na espécie bovina, 30,7% na espécie caprina, 31,45% na espécie ovina e 42,2% na espécie bubalina, destacando-se a etiologia por Staphylococcus spp. Os fatores de risco associados à ocorrência de mastite estão relacionados a problemas no saneamento ambiental e ao manejo dos animais. As bactérias isoladas do leite mastítico apresentam maior percentual de resistência a penicilina, ampicilina, amoxicilina e neomicina e a utilização de técnicas moleculares no diagnóstico dos agentes causadores de mastites no país, ainda é escassa o que dificulta a obtenção de um diagnóstico mais rápido, sensível e específico.

  13. Dermatite multifatorial em um canino

    Directory of Open Access Journals (Sweden)

    C.B. Matos

    2012-12-01

    Full Text Available Relatou-se um caso clínico de dermatite multifatorial em cão, envolvendo Demodex canis, Sporothrix schenckii e bactérias dos gêneros Staphylococcus e Streptococcus. O animal, macho, da raça Pit Bull, com um ano e três meses de idade, apresentou lesões úmidas, hiperêmicas, descamativas e ulcerativas nas regiões do pescoço e do tórax. Exames laboratoriais confirmaram o diagnóstico de infecção concomitante por fungo, bactéria e parasito. A terapia antimicrobiana com moxidectina, itraconazol e amoxicilina foi efetiva, com remissão dos sinais clínicos após 30 dias de tratamento. Este relato salienta a importância do diagnóstico de certeza, que foi determinante para estabelecimento da terapêutica adequada e recuperação do animal.

  14. Revivendo experiências: em foco a leitura em comunidades

    Directory of Open Access Journals (Sweden)

    Marlene Edite Pereira Rezende

    Full Text Available Este artigo teve como objetivo recuperar, de forma destacada, duas experiências de trabalho de extensão na UFMG: o carro-biblioteca da ECI\\UFMG e a implantação das Bibliotecas Públicas e Biblioteca Móvel do COLTEC\\UFMG. A estas experiências somaram-se ainda as informações sobre as atividades de extensão, através de Carros-Biblioteca, realizadas no âmbito da Biblioteca Pública Estadual Luiz de Bessa e pelo SESC. Revendo estas experiências torna-se patente a importância destas ações para as comunidades, mas, revelam-se também as dificuldades/limitações para a continuidade e ampliação destes serviços que são de caráter significativo para a população. Destaca-se também que os projetos visam permitir o acesso à leitura em comunidades com carências socioculturais, mas, demostram, de forma crítica, a realidade e os desafios dos municípios de Caparaó e Alto Caparaó na administração e manutenção das bibliotecas lá instaladas. Argumenta-se ainda, como aspecto significativo, a necessidade de articulação das comunidades, de forma a reivindicarem junto aos gestores públicos o atendimento aos direitos da população.

  15. Teores proteicos em dietas para vacas Holandesas leiteiras em confinamento

    Directory of Open Access Journals (Sweden)

    V.R. Paiva

    2013-08-01

    Full Text Available Avaliou-se o efeito de dietas com níveis de proteína bruta ‒ PB (10, 12, 14 e 16% na matéria seca ‒ MS em vacas Holandesas mestiças com produção de leite médio (PL de 13kg/dia. Utilizou-se silagem de milho como volumoso, e a relação volumoso:concentrado foi de 75:25. Houve aumento linear para o consumo de todos os componentes da dieta, exceto para o consumo de carboidratos totais e carboidratos não fibrosos (CNF, que reduziram linearmente. O consumo dos nutrientes digestíveis totais (NDT apresentou comportamento quadrático, com valor máximo estimado de 10,13kg/dia, na dose de 15,62% de PB na dieta. As digestibilidades de PB, EE, FDN e FDNcp aumentaram linearmente. Já os valores de digestibilidade de MS, MO, CNF e NDT apresentaram efeito quadrático, estimando-se ponto de máximo de 65,09; 67,23; 78,35 e 67,92 nas doses de 15,39; 15,22; 15,62 e 15,68% de PB, respectivamente. A PL, sem e com correção para 3,5% de gordura, a variação de peso corporal e a composição do leite aumentaram linearmente, exceto para lactose, que não apresentou efeito. O nível de 14% de PB na dieta é o mais indicado para alimentação de vacas com produção média de 13kg/dia de leite.

  16. Enzymatic Properties and Mutational Studies of Chalcone Synthase from <em>Physcomitrella patensem>

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    Mahiran Basri

    2012-08-01

    Full Text Available <em>Pp>CHS is a member of the type III polyketide synthase family and catalyses the synthesis of the flavonoid precursor naringenin chalcone from <em>p>-coumaroyl-CoA. Recent research reports the production of pyrone derivatives using either hexanoyl-CoA or butyryl-CoA as starter molecule. The Cys-His-Asn catalytic triad found in other plant chalcone synthase predicted polypeptides is conserved in <em>Pp>CHS. Site directed mutagenesis involving these amino acids residing in the active-site cavity revealed that the cavity volume of the active-site plays a significant role in the selection of starter molecules as well as product formation. Substitutions of Cys 170 with Arg and Ser amino acids decreased the ability of the <em>Pp>CHS to utilize hexanoyl-CoA as a starter molecule, which directly effected the production of pyrone derivatives (products. These substitutions are believed to have a restricted number of elongations of the growing polypeptide chain due to the smaller cavity volume of the mutant’s active site.

  17. Preussianone, a New Flavanone-Chromone Biflavonoid from <em>Garcinia preussiiem> Engl.

    Directory of Open Access Journals (Sweden)

    Gerhard Bringmann

    2012-05-01

    Full Text Available A new flavanone-chromone biflavonoid, preussianone (1, has been isolated from the leaves of <em>Garcinia preussiiem>, along with four known biflavonoids. The absolute stereostructures were elucidated by chemical, spectroscopic, and chiroptical methods. The biological properties of the new biflavonoid against several bacterial strains were evaluated.

  18. Antibacterial Secondary Metabolites from the Cave Sponge <em>Xestospongia em>sp.

    Directory of Open Access Journals (Sweden)

    Sridevi Ankisetty

    2012-05-01

    Full Text Available Chemical investigation of the cave sponge <em>Xestospongia em>sp. resulted in the isolation of three new polyacetylenic long chain compounds along with two known metabolites. The structures of the new metabolites were established by NMR and MS analyses. The antibacterial activity of the new metabolites was also evaluated.

  19. Refração por retinoscopia com luz em faixa em cães

    OpenAIRE

    Ranzani,J.J.T.; Mobricci,L.A.L.; Carvalho,L.R.; Brandão,C.V.S.

    2008-01-01

    A refração ocular por retinoscopia com luz em faixa em 10 cães normais, sem raça definida, demonstrou que a maioria dos animais, independentemente do porte, apresentou tendência à hipermetropia, além de anisometropia e astigmatismo.

  20. The red fox - <em>Trichinella> relationship: a review of past and recent evidence

    Directory of Open Access Journals (Sweden)

    Alessandro Balestrieri

    2007-07-01

    Full Text Available Abstract In central and southern Europe, the red fox <em>Vulpes vulpesem> is considered the reservoir of the parasite nematode <em>Trichinella britoviem>, whose mainly fox-to-fox transmission would involve cannibalism in mountainous areas. Reviewing available literature, we examine the main ecological features of the host-parasite relationship, pointing out those aspects which do not agree with the currently accepted epidemiological pattern and requiring further research. Riassunto Il binomio volpe –Trichinella: analisi di dati pregressi e recenti riportati in letteratura. In Europa centro-meridionale la volpe <em>Vulpes vulpesem> è considerata il principale serbatoio del nematode parassita <em>Trichinella britoviem>, la cui trasmissione da volpe a volpe sarebbe assicurata da fenomeni di cannibalismo ricorrenti in ambiente montano. Esaminando la letteratura disponibile, vengono evidenziati i principali aspetti ecologici legati alla relazione ospite-parassita che non si accordano con il modello epidemiologico corrente e che richiedono ulteriori ricerche per essere pienamente compresi.

  1. Development of New Microsatellite Markers for <em>Salvia officinalisem> L. and Its Potential Use in Conservation-Genetic Studies of Narrow Endemic <em>Salvia brachyodonem> Vandas

    Directory of Open Access Journals (Sweden)

    Zlatko Liber

    2012-09-01

    Full Text Available Nine new microsatellite markers (SSR were isolated from <em>Salvia officinalisem> L. A total of 125 alleles, with 8 to 21 alleles per locus, were detected in a natural population from the east Adriatic coast. The observed heterozygosity, expected heterozygosity, and polymorphic information content ranged from 0.46 to 0.83, 0.73 to 0.93 and 0.70 to 0.92, respectively. New microsatellite markers, as well as previously published markers, were tested for cross-amplification in <em>Salvia brachyodon em>Vandas, a narrow endemic species known to be present in only two localities on the Balkan Peninsula. Out of 30 microsatellite markers tested on the natural <em>S. brachyodonem> population, 15 were successfully amplified. To obtain evidence of recent bottleneck events in the populations of both species, observed genetic diversity (<em>H>E was compared to the expected genetic diversity at mutation-drift equilibrium (<em>H>EQ and calculated from the observed number of alleles using a two-phased mutation model (TPM. Recent bottleneck events were detected only in the <em>S. brachyodonem> population. This result suggests the need to reconsider the current threat category of this endemic species.

  2. Local feeding specialization of the red fox (<em>Vulpes vulpesem> in response to eastern cottontail (<em>Sylvilagus floridanusem> introduction (NW Italy

    Directory of Open Access Journals (Sweden)

    Alessandro Balestrieri

    2006-03-01

    Full Text Available Abstract To appreciate the influence of the introduction of the Eastern cottontail (<em>Sylvilagus floridanusem> on the food habits of the red fox (Vulpes vulpes, between June 1998 and February 2000 fox diet was investigated by means of scat analysis (N=115 in a 250 ha wide Natural Reserve of NW Italy, and compared with data collected in the same area prior to cottontail colonization (1988-1989. Comparison included also the diet of badgers (<em>Meles melesem>, considered as potential competitors for food resources. Alien lagomorphs (mean percent volume, Vm% = 68% represented by far the most exploited resource, only three other food items reaching values of mean percent volume barely higher than 5%. Cottontails frequency of occurrence did not vary according either to season or to their reproductive cycle (II-IX vs. X-I, whilst diet niche breadth varied inversely proportional to the use of this key-resource. Overall fox trophic niche breadth varied from 0.64 in 1988-89 to 0.31 in 1998-00 (B, Levin’s index. These findings led us to consider the feeding habits of the fox in the study area as a result of local specialization of a typical generalist carnivore, according to the predictions of optimal foraging theory. No variation occurred in the badger niche breadth since cottontail introduction, whilst niche overlap between foxes and badgers decreased from 0.59 to 0.13 (O, Pianka’s index, possibly reducing competition for food in summer. Riassunto Specializzazione alimentare a livello locale della Volpe <em>Vulpes vulpesem> in risposta all’introduzione del Silvilago <em>Sylvilagus floridanusem> (Italia nord occidentale. Per valutare gli effetti dell’introduzione del Silvilago (<em>Sylvilagus floridanusem> sul comportamento alimentare della volpe (<em>Vulpes vulpesem>, nel periodo giugno 1998-febbraio 2000, la dieta del carnivoro è stata definita tramite l’analisi di 115

  3. Are EM's communication tools effective? Evaluation research of two EM publications

    International Nuclear Information System (INIS)

    Wight, Evelyn; Gardner, Gene; Harvey, Tony

    1992-01-01

    As a reflection of its growing culture of openness, and in response to the public's need for accurate information about its activities, the U.S. Department of Energy (DOE) Office of the Assistant Secretary for Environmental Restoration and Waste Management (EM) has increased the amount of information available to the public through communication tools such as brochures, fact sheets, and a travelling exhibit with an interactive computer display. Our involvement with this effort has been to design, develop, and critique booklets, brochures, fact sheets and other communication tools for EM. This paper presents an evaluation of the effectiveness of two communication tools we developed: the EM Booklet and the EM Fact Sheets. We measured effectiveness using non-parametric testing. This paper describes DOE's culture change, EM's communication tools and their context within DOE'S new open culture, our research, test methods and results, the significance of our research, and our plans for future research. (author)

  4. Status and conservation of the red squirrel (<em>Sciurus vulgarisem> in Portugal

    Directory of Open Access Journals (Sweden)

    Maria da Luz Mathias

    1998-12-01

    Full Text Available Abstract The historical and recent status and distribution of the red squirrel (<em>Sciurus vulgarisem> in Portugal are analysed using published data, preserved material and unpublished information. In the past the red squirrel occupied the whole of Portugal, but died out towards the end of the 16th century. Now, however, red squirrels have moved back in from Spain and recolonised forests in the north of the country. An important factor limiting the distribution of squirrels in the past was the availability of suitable habitat which provide shelter and food, such as conifer woods. Hunting pressure may also have affected numbers. In Portugal the conservation status of <em>S. vulgarisem> is Rare.

  5. Repairability during G1 of the inductor leisure of exchanges in the sister chromatid induced by alkylating agents in DNA substituted and no substituted with BUDR, in cells of the salivary gland of mouse In vivo; Reparabilidad durante G1 de las lesiones inductoras de intercambios en las cromatidas hermanas inducidos por agentes alquilantes en ADN sustituido y no sustituido con BrdU, en celulas de la glandula salival de raton In vivo

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez B, F

    2004-07-01

    In this work you determines the repair of the lesions inductoras of Sister chromatid exchange (ICHs) generated in the cells of the salivary gland of mouse, for the treatment with the N-Methyl-N-Nitrosourea (MNU), the N-Ethyl-N-Nitrosourea (ENU), the Methyl methanesulfonate (MMS) and the Ethyl methanesulfonate (EMS) in early and slow G1 of the first one and the second cellular division, that is to say before and after the cells incorporate 5-bromine-2 -Desoxyuridine (BrdU) in the DNA. Groups witness non treaties were included with mutagen. The cells of the salivary gland repaired the generated lesions partially by the MNU, the MMS and the EMS in the 1st division, and only the lesions induced by the ENU and MMS were repaired partially in the 2nd division. The ENU generates injure that they were not repaired in the 1st division and those taken place by the EMS were little repaired in the 2nd division. The methylating agents generated but ICHs that the ethylating. One observes that the BrdU makes to the molecule of the DNA but susceptible to the damage generated by the alkylating agents that induce the formation of the ICHs. This susceptibility was incremented around 150% for the treatment with the MNU, the ENU and the MMS, on the other hand for the EMS it was 3 times minor. It is proposed that the one electronegative atom of this analog of the timine would to work as a nucleophyllic center with which the electrophyllic compounds react. (Author)

  6. The EM technology development strategy

    International Nuclear Information System (INIS)

    Frank, C.W.; Barainca, M.; Kubo, A.S.

    1992-01-01

    The Office of Technology Development (TD) supports research and development of technologies that will lower cost, reduce risk, improve safety, and accelerate cleanup of the Nuclear Weapons Complex and provide solutions to currently untractable environmental problems. The TD strategic plan outlines Applied Research, Development, Demonstration, Testing, and Evaluation (RDDT and E) that will provide needed technology products to be used by Environmental Restoration and Waste Management operations (i.e., our customers). The TD strategic plan is derived from EM Goals, Objectives, and Strategy and is incorporated into DOE'S Five-Year Plan for Environmental Restoration and Waste Management. The TD strategic plan is developed based on integrating customer requirements, and is complemented by a top-down, bottom-up analysis of Site Specific Technology Needs and environmental problems. The execution of TD's strategic plan is implemented largely through Integrated Programs (IP) and Integrated Demonstrations (ID). IDs have proven to be a cost-effective method of managing technology development, testing and evaluation, and implementation of successful technology systems into the DOE Environmental Restoration and Waste Management Programs. The Savannah River ID for Volatile Organic Compounds (VOCs) in Saturated Soils resulted in a 51 percent cost savings over stand-alone demonstrations, saving over $8 million. The IPs and IDs are selected based on customer needs, technical complexity, and complex-wide regulatory and compliance agreements. New technology systems are selected for incorporation into an IP or ID from offerings of the DOE laboratories, industry, and the universities. A major TD initiative was announced in August 1991, with the release of a Program Research and Development Announcement (PRDA) requesting industry and universities to propose innovative new technologies to clean up the Weapons Complex. (author)

  7. EMS adaptation for climate change

    Science.gov (United States)

    Pan, C.; Chang, Y.; Wen, J.; Tsai, M.

    2010-12-01

    The purpose of this study was to find an appropriate scenario of pre-hospital transportation of an emergency medical service (EMS) system for burdensome casualties resulting from extreme climate events. A case of natural catastrophic events in Taiwan, 88 wind-caused disasters, was reviewed and analyzed. A sequential-conveyance method was designed to shorten the casualty transportation time and to promote the efficiency of ambulance services. A proposed mobile emergency medical center was first constructed in a safe area, but nearby the disaster area. The Center consists of professional medical personnel who process the triage of incoming patients and take care of casualties with minor injuries. Ambulances in the Center were ready to sequentially convey the casualties with severer conditions to an assigned hospital that is distant from the disaster area for further treatment. The study suggests that if we could construct a spacious and well-equipped mobile emergency medical center, only a small portion of casualties would need to be transferred to distant hospitals. This would reduce the over-crowding problem in hospital ERs. First-line ambulances only reciprocated between the mobile emergency medical center and the disaster area, saving time and shortening the working distances. Second-line ambulances were highly regulated between the mobile emergency medical center and requested hospitals. The ambulance service of the sequential-conveyance method was found to be more efficient than the conventional method and was concluded to be more profitable and reasonable on paper in adapting to climate change. Therefore, additional practical work should be launched to collect more precise quantitative data.

  8. Infracommunities of intestinal helminths of the Red Fox <em>Vulpes vulpesem> (Linnaeus, 1758 from Italian Alps

    Directory of Open Access Journals (Sweden)

    Anna Rita Di Cerbo

    2003-10-01

    Full Text Available <em>Vulpes vulpesem> (Linnaeus, 1758 is one of the most common carnivore in Italy and its spread includes almost the whole national territory. The species shows an high ecological plasticity and a variable diet composition connected in part to human sources. This high adaptability permits the red foxes to colonize different habitats like the suburbs of large cities as well as the small villages located in mountain areas. On the other hand, the tourism pressure seems to assume a great importance in the Alps, also in those areas where the foxes live. So, indirect interactions could take place between these animals and the humans. The role of <em>V. vulpesem> in the zoonoses has not to be understated since this carnivore could transmit parasitic diseases that are able to cause serious pathologies in humans. This study aims just to investigate on intestinal communities of helmiths of <em>V. vulpesem> in order to make progress in current knowledge on epidemiological situation in Italian Alps. During 1998-2003, we have examined 450 foxes from Trentino Alto Adige, Veneto, Lombardia and Valle d'Aosta. The specimens collected were found dead or have been hunted (according to national law n. 157/92 in localities situated between 170 and 2200 m a.s.l. The carcasses were carried to the provincial sections of Zooprofilattici Institutes, where the intestine was drawn by each sample and all the material was sent to the Faculty of Veterinary Medicine of Milan. Parasitological examination of the small intestines was performed by the analysis of the whole sediment and counting technique (SCT. Parasites were preserved in alcohol 70° before to be clarified or stained and identified by microscope (Zeiss Axioscop. Mean abundance, mean intensity and prevalence were calculated for each taxon of helminth. Dates of sampling were grouped within the four seasons. Statistic tests were performed with software package SPSS rel. 11.5 and spatial analysis with the

  9. Prevalência de comportamentos alimentares disfuncionais em mulheres idosas

    OpenAIRE

    Gomes, Fabiana Vanessa Silva

    2015-01-01

    Dissertação de mestrado em Psicologia Aplicada (área de especialização em Psicologia Clínica e da Saúde) Comportamentos alimentares disfuncionais são frequentes em jovens, mas pouco se sabe sobre a sua prevalência em mulheres idosas. Este estudo consiste em estudar a prevalência pontual de comportamentos alimentares disfuncionais em mulheres com 65 anos ou mais. Estudo de prevalência constituído por um momento de avaliação de duas fases com 342 mulheres entre os 65 e 94 anos...

  10. Synthesis and Cytotoxicity Evaluation of 13-<em>n>-Alkyl Berberine and Palmatine Analogues as Anticancer Agents

    Directory of Open Access Journals (Sweden)

    Lei Zhang

    2012-09-01

    Full Text Available By introducing long carbon-chain alkyl groups at the C-13 position of berberine and palmatine, 13-<em>n>-hexyl/13-<em>n>-octyl berberine and palmatine chloride analogues 4ad were synthesized and examined by MTT assays for cytotoxic activity in seven human cancer cell lines (7701QGY, SMMC7721, HepG2, CEM, CEM/VCR, KIII, Lewis, yielding IC50 values of 0.02 ± 0.01–13.58 ± 2.84 μM. 13-<em>n>-Octyl palmatine (compound 4d gave the most potent inhibitor activity, with an IC50 of 0.02 ± 0.01 μM for SMMC7721. In all cases, the 13-<em>n>-alkyl berberine and palmatine analogues 4ad were more cytotoxic than berberine and palmatine. In addition, compounds 4ad also exhibited more potent cytotoxicity than berberine and palmatine in mice with S180 sarcoma xenografted<em> in vivoem>. The primary screening results indicated that the 13-<em>n>-hexyl/13-<em>n>-octyl berberine and palmatine analogues might be valuable source for new potent anticancer drug candidates.

  11. Patient Perspectives on EMS Alternate Destination Models.

    Science.gov (United States)

    Munjal, Kevin G; Shastry, Siri; Loo, George T; Reid, Daniel; Grudzen, Corita; Shah, Manish N; Chapin, Hugh H; First, Brandon; Sirirungruang, Sasilada; Alpert, Erin; Chason, Kevin; Richardson, Lynne D

    2016-01-01

    Studies have shown that a large number of ambulance transports to emergency departments (ED) could have been safely treated in an alternative environment, prompting interest in the development of more patient-centered models for prehospital care. We examined patient attitudes, perspectives, and agreement/comfort with alternate destinations and other proposed innovations in Emergency Medical Services (EMS) care delivery and determined whether demographic, socioeconomic, acuity, and EMS utilization history factors impact levels of agreement. We conducted a cross-sectional study on a convenience sample of patients and caregivers presenting to an urban academic ED between July 2012 and May 2013. Respondents were surveyed on levels of agreement with 13 statements corresponding to various aspects of a proposed patient-centered emergency response system including increased EMS access to healthcare records, shared decision making with the patient and/or primary care physician, transport to alternative destinations, and relative importance of EMS assessment versus transportation. Information on demographic and socioeconomic factors, level of acuity, and EMS utilization history were also determined via survey and chart review. Responses were analyzed descriptively and compared across patient characteristics using chi-square and regression analyses. A total of 621 patients were enrolled. The percentage of patients who agreed or strongly agreed with each of the 13 statements ranged from 48.2 to 93.8%. About 86% agreed with increased EMS access to healthcare records; approximately 72% agreed with coordinating disposition decisions with a primary physician; and about 58% supported transport to alternative destinations for low acuity conditions. No association was found between levels of agreement and the patient's level of acuity or EMS utilization history. Only Black or Hispanic race showed isolated associations with lower rates of agreement with some aspects of an innovative

  12. EMS certification requirements for flight nurses.

    Science.gov (United States)

    Frakes, Michael A; Lord, Wendy R

    2004-01-01

    Emergency medical technician (EMT) or paramedic (EMTP) certification requirements for flight nurses (FNs) providing on-scene patient care vary. We surveyed those requirements and evaluated the relationships between flight team composition or program location and FN EMS certification. Telephone survey of all 184 rotor-wing programs responding with a nurse to scenes The overall EMS training requirement for FNs was: none-57.6%, EMT-21.7%, EMTP-14.7%, local credential (not EMT or EMTP)-6.0%. Second team members were EMTP, RN, physician, or respiratory therapist (RRT). Overall, team configuration related significantly to FN EMS certification (P =.01). FN/EMTP and FN/RRT teams were individually significant (P EMTP teams tending not to require certification and all FN/RRT teams tending toward a certification requirement. Neither FN/FN nor FN/physician pairings related significantly with FN EMS certification requirements. Regional patterns emerged to both crew configuration and FN EMS certification requirements. Most flight programs do not require FN EMT/EMTP certification. Team configuration and geography are related to those requirements.

  13. Triagem em saúde mental infantil

    Directory of Open Access Journals (Sweden)

    Fabiana Vieira Gauy

    Full Text Available Este estudo foi conduzido para comparar os resultados de um procedimento grupal aberto e um procedimento individual estruturado para avaliação do comportamento da criança conforme o relato materno. Participaram deste estudo 29 mães que buscavam atendimento para seus filhos em uma unidade de saúde mental infanto-juvenil. As primeiras 15 mães que procuraram o serviço foram entrevistadas individualmente conforme um roteiro estruturado desenvolvido a partir do CBCL e depois foram entrevistadas em grupo, em formato aberto. As outras 14 mães participaram da entrevista grupal aberta e em seguida participaram da entrevista individual estruturada. Os resultados das entrevistas foram comparados tomando como referência as 67 categorias comportamentais identificadas a partir do roteiro individual e quatro variáveis contextuais relatadas nos dois procedimentos. Os resultados mostram que um número substancialmente maior de comportamentos-problema foi identificado através de entrevista individual estruturada do que através de entrevista grupal aberta realizada com os mesmos informantes. É possível que o uso de um roteiro estruturado em entrevistas grupais possa oferecer mais informações com otimização do tempo de avaliação.

  14. NECESSIDADE E LIBERDADE EM HANNAH ARENDT

    Directory of Open Access Journals (Sweden)

    Odílio Alves Aguiar

    2015-07-01

    Full Text Available O presente artigo visa refletir sobre o pensamento de Hannah Arendt à luz do par conceitual necessidade-liberdade. Esse caminho é produtivo, pois dá conta tanto da obra mais conhecida e reconhecida da autora quanto das suas reflexões anteriores à Origens do Totalitarismo, que se dirigiam, na sua maioria, à comunidade dos Judeus e tinham a questão judaica como ponto central. As meditações arendtianas sobre o judaísmo, consideradas no presente artigo, foram publicadas em duas coletâneas na França: La tradition Cachée (1987 e Auschwitz et Jérusalem (1991. O artigo gravita em torno da defesa arendtiana sobre a inerência entre política e liberdade e sua substituição pela compreensão da política como submetida à esfera da necessidade. Essa perspectiva, segundo a autora, fez-se presente na tradição assimilacionista entre os judeus, mas já tinha obtido a hegemonia na cultura ocidental. Isso sucedeu em razão da primazia da vita contemplativa sobre a vita activa, do trabalho e da questão social em detrimento da ação e, por fim, da supremacia da filosofia da história em prejuízo da Filosofia Política.

  15. Institutos de pesquisa em saúde

    Directory of Open Access Journals (Sweden)

    Camargo Erney Plessmann

    2004-01-01

    Full Text Available Ao fim do século 19, em seguida aos avanços na assepsia cirúrgica e no esclarecimento do papel de microorganismos como causadores de moléstias infecciosas, foram criados em escala mundial "institutos de pesquisa com os objetivos de conduzir pesquisa sobre as causas, prevenção e tratamento de homens e animais e de desenvolver produtos preventivos e curativos como vacinas e antitoxinas". Para atingir esses objetivos os institutos recrutaram os melhores cientistas disponíveis em todos os lugares. Este foi um período fulgurante para a pesquisa sublinhado por inúmeras descobertas sobre as doenças infecciosas. Passada essa fase, os institutos entraram em depressão e até mesmo insolvência. Muitos se recuperaram, alguns não. Muitos ainda sofrem de uma "crise de identidade". Neste ensaio analisamos o destino dos institutos de pesquisa em saúde no Brasil, as causas de seu sucesso e eventuais fracassos e as medidas possíveis de ajudá-los a contornar suas presentes dificuldades.

  16. Institutos de pesquisa em saúde

    Directory of Open Access Journals (Sweden)

    Erney Plessmann Camargo

    2004-06-01

    Full Text Available Ao fim do século 19, em seguida aos avanços na assepsia cirúrgica e no esclarecimento do papel de microorganismos como causadores de moléstias infecciosas, foram criados em escala mundial "institutos de pesquisa com os objetivos de conduzir pesquisa sobre as causas, prevenção e tratamento de homens e animais e de desenvolver produtos preventivos e curativos como vacinas e antitoxinas". Para atingir esses objetivos os institutos recrutaram os melhores cientistas disponíveis em todos os lugares. Este foi um período fulgurante para a pesquisa sublinhado por inúmeras descobertas sobre as doenças infecciosas. Passada essa fase, os institutos entraram em depressão e até mesmo insolvência. Muitos se recuperaram, alguns não. Muitos ainda sofrem de uma "crise de identidade". Neste ensaio analisamos o destino dos institutos de pesquisa em saúde no Brasil, as causas de seu sucesso e eventuais fracassos e as medidas possíveis de ajudá-los a contornar suas presentes dificuldades.

  17. EM International, July 1994, Volume 2

    International Nuclear Information System (INIS)

    1994-01-01

    The Office of Environmental Management (EM) at the Department of Energy (DOE) is seeking out and leveraging foreign technology, data, and resources in keeping with EM's mandate to protect public health and the environment through the safe and cost-effective remediation of the Department's nuclear weapons sites. EM works closely with foreign governments, industry, and universities to obtain innovative environmental technologies, scientific and engineering expertise, and operations experience that will support EM's objectives. Where appropriate, these international resources are used to manage the more urgent risks at our sites, secure a safe workplace, help build consensus on critical issues, and strengthen our technology development program. Through international agreements EM engages in cooperative exchange of information, technology, and individuals. Currently, we are managing agreements with a dozen countries in Europe, Latin America, and Asia. These agreements focus on environmental restoration, waste management, transportation of radioactive wastes, and decontamination and decommissioning. This publication contains the following articles: in situ remediation integrated program; in-situ characterization and inspection of tanks; multimedia environmental pollutant assessment system (MEPAS); LLNL wet oxidation -- AEA technology. Besides these articles, this publication covers: EU activities with Russia; technology transfer activities; and international organization activities

  18. Desempenho em leitura/escrita e em cálculos aritméticos em crianças de 2ª série

    OpenAIRE

    Golbert, Clarissa Seligman; Salles, Jerusa Fumagalli de

    2010-01-01

    Esta pesquisa investiga os desempenhos em leitura e escrita e em aritmética básica. Dois grupos de crianças - 15 competentes em leitura/escrita e 12 com dificuldades - foram comparados quanto ao desempenho em cálculos aritméticos com o intuito de identificar em que aspectos do desempenho numérico se assemelham ou se diferenciam. Investigou-se também a relação entre desempenho aritmético, tarefas neuropsicológicas (leitura, escrita, habilidades perceptivo-motoras, linguagem oral, velocidade de...

  19. Comunicação em grupo em um ambiente paralelo/distribuído baseado em multicomputador

    OpenAIRE

    Bortoluzzi, Dayna Maria; Giraldi, Márcia; Friedrich, Luis Fernando; Silveira, Cláudia Heusi

    1998-01-01

    O grande objetivo do processamento paralelo/distribuído é aumentar o desempenho de aplicações que necessitam de grande poder computacional e que são pouco eficientes quando executadas seqüencialmente. Para tanto, o aumento de desempenho é obtido particionando-se uma tarefa em tarefas menores e executando-as em diferentes processadores, paralelamente. Um conjunto de processadores interconectados é a definição mais simples de um ambiente paralelo/distribuído. Os multicomputadores são ambientes ...

  20. Study in vitro of dental enamel irradiated with a high power diode laser operating at 960 nm: morphological analysis of post-irradiation dental surface and thermal effect analysis in pulp chamber due to laser application; Estudo in vitro do esmalte dental irradiado com laser de diodo de alta potencia em 960 nm: analise morfologica da superficie dental pos-irradiada e analise do comportamento termico na camara pulpar devido a aplicacao laser

    Energy Technology Data Exchange (ETDEWEB)

    Quinto Junior, Jose

    2001-07-01

    Objectives: This study examines the structural and thermal modifications induced in dental enamel under dye assisted diode laser irradiation. The aim of this study is to verify if this laser-assisted treatment is capable to modify the enamel surface by causing fusion of the enamel surface layer. At the same time, the pulpal temperature rise must be kept low enough in order not to cause pulpar necrosis. To achieve this target, it is necessary to determine suitable laser parameters. As is known, fusion of the enamel surface followed by re-solidification produce a more acid resistant layer. This surface treatment is being researched as a new method for caries prevention. Method and Materials: A series of fourteen identically prepared enamel samples of human teeth were irradiated with a high power diode laser operating at 960 nm and using fiber delivery. Prior to irradiation, a fine layer of cromophorous ink was applied to the enamel surface. In the first part of the experiment the best parameter for pulse duration was determined. In the second part of the experimental phase the same energy density was used but with different repetition rates. During irradiation we monitored the temperature rise in the pulpal cavity. The morphology of the treated samples was analysed under SEM. Results: The morphology of the treated samples showed a homogeneously re-solidified enamel layer. The results of the temperature analysis showed a decrease of the pulpal temperature rise with decreasing repetition rate. Conclusion: With the diode laser it is possible to cause morphological alterations of the enamel surface, which is known to increase the enamel resistance against acid attack, and still maintain the temperature rise in the pulpar chamber below damage threshold. (author)

  1. Application of a portable equipment EDXRF (energy dispersive X-ray fluorescence) in the monitoring of the restoration work of murals paints in the Church of Paroquia Imaculada Conceicao (Sao Paulo, SP); Aplicacao de um equipamento portatil de EDXRF (fluorescencia de raios X por dispersao em energia) no acompanhamento dos trabalhos de restauro de pinturas murais na igreja da Paroquia Imaculada Conceicao (Sao Paulo, SP)

    Energy Technology Data Exchange (ETDEWEB)

    Appoloni, Carlos Roberto; Parreira, Paulo Sergio, E-mail: appoloni@uel.b, E-mail: parreira@uel.b [Universidade Estadual de Londrina (UEL), PR (Brazil); Rizzo, Marcia [MRizzo Restauracoes - Laboratorio de Conservacao e Restauracao de Bens Culturais Ltda., Sao Paulo, SP (Brazil)

    2006-07-01

    This paper presents the application of the portable EDXRF (energy dispersive X-ray fluorescence) of the Laboratorio de Fisica Nuclear Aplicada of the Universidade Estadual de Londrina in the analysis in situ of pigments in wall paintings, as well as in monitoring restoration processes

  2. Application of neutron activation analysis to the determination of total mercury and other elements of interest in soil and sediment samples from Serra do Navio and Vila Nova River Basin, Amapa, Brazil; Aplicacao do metodo de ativacao neutronica a determinacao do mercurio total e outros elementos de interesse em amostras de solo e sedimento da Serra do Navio e Bacia do Rio Vila Nova, Amapa

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, Cristina

    1997-07-01

    In this work it is presented a survey on total mercury determination by a radiochemical method in sediment and soil samples from two regions, in the state of Amapa: Serra do Navio (background area) and Vila Nova river basin (gold mining area). The method consisted in leaching of the irradiated samples with acqua regia in a Parr bomb, and heating in microwave oven, for one minute. Then the solvent extraction technique was applied, using bismuth diethyldithiocarbamate (Bi(DDC){sub 3}) as extractant agent. The organic phase, containing {sup 197}Hg and {sup 203}Hg radioisotopes, was measured in a gamma spectrometer with hyper pure Ge detector. This method eliminated the interference of the 279.54 keV photopeak of {sup 75}Se on 279.2 keV photopeak of {sup 203}Hg, besides improving counting statistics of both Hg radioisotopes. The elements As, Ba, Br, Ce, Co, Cr, Cs, Eu, Fe, Hf, Ho, K, La, Lu, Mg, Mn, Na, Nd, Rb, Sb, Sc, Se, Sm, Ta, Tb, Th, Ti, U, V, W, Yb, Zn and Zr were also determined by the instrumental neutron activation analysis. Two irradiation series were carried out to quantify these elements in soil and sediment samples; a short term irradiation allowed to evaluate Mg, Mn, Na, Ti and V levels, and by long term irradiation, the other elements were determined. Precision and accuracy of radiochemical procedure were verified by means of analysis of the reference materials Buffalo River Sediment and Lake Sediment, for sediments and GXR-5, for soils. For the instrumental analysis, the reference materials Buffalo River Sediment, Soil 7, JB-1 and Oyster Tissue were used. The samples were also submitted to X ray diffraction, in Instituto de Geoscience-USP, to observe mercury behaviour with mineralogy. Aluminium concentration was determined by X ray fluorescence method, in the Department of Materials, IPEN/CNEN-SP, making possible enrichment factor calculation so that mercurial contamination in the gold mining area (Vila Nova river basin) could be evaluated. The mercury levels obtained in this work were compared to those from other Brazilian regions, where the gold mining activities are being carried out, releasing this metal to the environment. To the multielemental results, it was applied Varimax rotation factorial analysis to verify geochemistry signature of the soils and sediments from both studied regions, besides Pearson similarity correlation test application and comparison to average values of terrestrial crust. (author)

  3. Roost selection by barbastelle bats (<em>Barbastella barbastellusem>, Chiroptera: Vespertilionidae in beech woodlands of central Italy

    Directory of Open Access Journals (Sweden)

    Danilo Russo

    2003-10-01

    Full Text Available The barbastelle bat, <em>Barbastella barbastellusem> (Schreber, 1774 is a medium-sized, tree-dwelling vespertilionid classified as ?Endangered? in Italy; in western Europe it may be one of the rarest bat species. <em>B. barbastellusem> shows roosting preferences that should be regarded as a key point in conservation protocols. We examined roost selection in a breeding population of <em>B. barbastellusem> from the Abruzzo Lazio and Molise National Park (central Italy at three levels: woodland structure and management type; tree characteristics; and cavity characteristics. In 2001-2002, we fitted 31 adult <em>B. barbastellusem> (29 lactating females, one pregnant female and one male with 0.48g radio-tags and tracked them to their roost-trees. The bats were tracked for 4.5 ± 3.7 days (range: 0-12 days. We located 33 roosts used by 25 subjects (1.8±1.2 roosts/bat, range 1-5. The bats switched roosts frequently: 13 bats used more than one tree over the study period. A chi-square analysis showed that the roosts were not distributed at random across woodland categories: unmanaged woodland was positively selected, whereas shelterwood-harvested woodland was used in proportion to its availability, and ?pastures+scattered trees? was avoided. Twenty out of 33 roost trees were dead <em>Fagus sylvaticaem> trees; conversely, living <em>F. sylvaticaem> dominated in a tree sample obtained at random; dead trees were used more than expected (Χ² test, <em>P> <0.001. Overall, roost trees were significantly taller and had a larger diameter at breast?s height and more cavities than random trees; they also had a lower percent canopy closure than random trees. To highlight which variables were actually associated with selection, we devised a logistic regression model. The full model was significant (<em>P> <0.001; removal of tree type and tree height affected the model significantly, but the other variables did not produce detectable effects. The

  4. O antinaturalismo em Confiança

    Directory of Open Access Journals (Sweden)

    Souza, Fabiano de

    2001-01-01

    Full Text Available Desde a sua estréia com Uma relação perigosa (The unbelievable truth, 1989, Hal Hartley vem se destacando no cenário internacional, não só por sua contínua produção – oito títulos em doze anos –, mas também por algumas características presentes em seus filmes: em termos de temática, pode-se dizer que, na maioria deles, a história de jovens não adaptados à sociedade serve de base para uma reflexão sobre os sentimentos humanos e para uma crítica severa ao american way of life

  5. A metamorfose das formas em Tatiana Blass

    Directory of Open Access Journals (Sweden)

    Viviane Baschirotto

    2015-06-01

    Full Text Available Este artigo é uma pequena parte da dissertação de mestrado defendida em 2015 que se ocupou de pensar o gesto artístico da artista visual brasileira Tatiana Blass. Cada artista possui um gesto que carrega consigo, que se encontra como uma persistência e recorrência em sua produção e sempre retorna. Um dos gestos da artista se encontra na metamorfose das formas com os usos distintos de meios e materiais. Utilizando principalmente os conceitos de arquidesenho de Yves Alain Bois e acontecimento de Gilles Deleuze, o artigo se propõe a refletir sobre a plausibilidade do gesto da metamorfose em suas obras tridimensionais que se encontram entre escultura, performance e instalação.

  6. Intense EM filamentation in relativistic hot plasmas

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Qiang-Lin [Department of Physics, Jinggangshan University, Ji' an, Jiangxi 343009 (China); Chen, Zhong-Ping [Department of Physics and Institute for Fusion Studies, The University of Texas at Austin, Austin, TX 78712 (United States); Mahajan, Swadesh M., E-mail: mahajan@mail.utexas.edu [Department of Physics and Institute for Fusion Studies, The University of Texas at Austin, Austin, TX 78712 (United States); Department of Physics, School of Natural Sciences, Shiv Nadar University, Uttar Pradesh 201314 (India)

    2017-03-03

    Highlights: • Breaking up of an intense EM pulse into filaments is a spectacular demonstration of the nonlinear wave-plasma interaction. • Filaments are spectacularly sharper, highly extended and longer lived at relativistic temperatures. • EM energy concentration can trigger new nonlinear phenomena with absolute consequences for high energy density matter. - Abstract: Through 2D particle-in-cell (PIC) simulations, we demonstrate that the nature of filamentation of a high intensity electromagnetic (EM) pulse propagating in an underdense plasma, is profoundly affected at relativistically high temperatures. The “relativistic” filaments are sharper, are dramatically extended (along the direction of propagation), and live much longer than their lower temperature counterparts. The thermally boosted electron inertia is invoked to understand this very interesting and powerful phenomenon.

  7. O homem e a liberdade em Plotino

    Directory of Open Access Journals (Sweden)

    Ullmann, Reinholdo Aloysio

    2008-01-01

    Full Text Available Este artigo versa sobre o problema do homem e da liberdade em Plotino, baseado nas Enéadas. O filósofo licopolitano defende, como Platão, a preexistência da alma e, ao mesmo tempo, a liberdade de escolha entre o bem e o mal. O grau máximo de liberdade está na hênosis, isto é, na união mística, pelo êxtase, com o Uno. O autor também mostra que Plotino é panenteísta. Deus é chamado de "causa sui", o que significa que o Uno é o que quer ser e não pode ser diferente. Nas considerações finais, destaca-se Plotino como homem que serve de exemplo em busca da transcendência, em nosso mundo antimetafísico

  8. Preditores do Comportamento Antissocial em Adolescentes

    Directory of Open Access Journals (Sweden)

    Fernanda Lüdke Nardi

    Full Text Available RESUMO Este estudo investigou preditores do comportamento antissocial em 142 adolescentes em medida socioeducativa de internação (G1 e 691 estudantes de escolas públicas (G2, que responderam a um questionário. Foram observadas diferenças significativas entre os grupos quanto ao comportamento antissocial, violência intra e extrafamiliar, uso de drogas e eventos estressores, com médias mais altas em G1. Dentre as variáveis investigadas, grupo, uso de drogas e eventos estressores, juntamente com a covariável sexo, explicaram 66,5% da variável dependente. Um modelo de path analysis demonstrou que as variáveis sexo e ambiente estressor, computado pelos eventos estressores, qualidade do relacionamento familiar e violência intra e extrafamiliar predizem o uso de drogas e comportamentos antissociais.

  9. Tricolemoma em coelho Tricholemmoma in a rabbit

    Directory of Open Access Journals (Sweden)

    Krishna Duro de Oliveira

    1999-06-01

    Full Text Available Tricolemoma é um raro tumor benigno, composto por células epiteliais claras derivadas da bainha externa da raiz do folículo piloso. Esses tumores têm sido descritos no homem e raramente em cães. No presente relato, descreve-se a ocorrência de um tricolemoma, de 1cm de diâmetro em um coelho adulto, cujas características histológicas são muito semelhantes às descritas para esses tumores em cães.Tricholemmoma is a rare benign tumor composed of clear epithelial cells derived from the outer root sheath of the hair follicle. The tumor has been described in man and rarely in dogs. This report deals with the occurrence of a tricholemmoma , with a diemeter of 1cm, in an adult rabbit. The histologic features are similar to those described in such tumors in dogs.

  10. Comportamento do fomesafen em solos brasileiros

    OpenAIRE

    Silva, Gustavo Rodrigues da

    2013-01-01

    A sorção e a lixiviação do fomesafen foram avaliadas em solos com diferentes características físico-químicas, e a persistência, em um Argissolo Vermelho-Amarelo cultivado com feijão nos sistemas de plantio direto e convencional. No primeiro experimento, avaliou-se o processo de sorção do fomesafen em Argissolo Vermelho- Amarelo, Cambissolo e Organossolo. Utilizou-se areia lavada, como material inerte, para determinação das razões de sorção do fomesafen. Para isso, o Sorghum vulgare, híbrido B...

  11. INOVAÇÃO EM PAÍSES EM DESENVOLVIMENTO: AVANÇOS E POSSIBILIDADES

    Directory of Open Access Journals (Sweden)

    João Batista Ferreira

    2016-06-01

    Full Text Available O presente artigo trata-se das experiências e tentativas de inovação em países em desenvolvimento, o que tem ocorrido com bastante frequência, já que a economia contemporânea tem se movido em função da incorporação e geração de inovações. Serão abordados os fatores e motivos que impulsionam esses países a buscarem inovações, além de ressaltar as consequências e mudanças ocorridas em sua economia. Sabe-se que a detenção do conhecimento tecnológico tem sido a principal arma para a dominação econômica e política, partindo desse pressuposto, as experiências de inovação tem sido a principal esperança dos países em desenvolvimento. O objetivo deste artigo é aprofundar os estudos e, assim, auxiliar pesquisadores e gestores envolvidos com essas experiências de inovação. A metodologia utilizada trata-se de um estudo teórico e exploratório, buscando através de bibliografias analisar o que vem sendo discutido referente a inovação em países em desenvolvimento.

  12. Ceratomicose em equinos Equine keratomycosis

    Directory of Open Access Journals (Sweden)

    Paula Diniz Galera

    2012-07-01

    Full Text Available O cavalo, dado o seu meio ambiente, está sujeito a afecções frequentes da córnea e da conjuntiva, tecidos oculares bastante expostos a bactérias e fungos, principalmente Aspergillus spp. e Fusarium spp. As ceratites ulcerativas bacterianas e fúngicas, bem como as ceratites fúngicas não ulcerativas, caracterizadas principalmente pelo abscesso estromal, são frequentes nessa espécie. Ocorrida a lesão inicial, perpetua-se um ciclo vicioso, com liberação de citocinas inflamatórias, que desencadeiam uma rápida e severa infiltração corneal por células polimorfonucleares. A córnea torna-se sujeita à destruição por enzimas proteolíticas liberadas pelos micro-organismos e por células inflamatórias, capazes de desencadear a dissolução estromal e a perfuração do bulbo ocular. O tratamento clínico para a resolução da doença corneal e o controle da uveíte reflexa deve ser agressivo e associado, muitas das vezes, à terapia cirúrgica. Este artigo discorre sobre a fisiopatologia e o tratamento da ceratomicose em equinos.Environmental and behavioral factors make horses susceptible to corneal and conjunctival lesions, since these structures are constantly exposed to bacteria and fungi specially Aspergillus spp. and Fusarium spp. Bacterial and fungal ulcerative keratitis, as well as non-ulcerative fungal keratitis such as stromal abscess, are frequent in horses. A "cascade" effect follows the initial lesion which triggers the release of inflammatory cytokines followed by an acute and severe infiltrate of polymorphonuclear cells in the cornea. The cornea becomes susceptible to the activity of proteolytic enzymes released by microorganisms and polymorphonuclear cells, resulting in stromal degradation and ocular perforation. The medical treatment targeting the corneal disease and the controlling of reflexive uveitis should be aggressive and surgical therapy should be associated in most of the cases. This paper reviews the

  13. AMIDO RESISTENTE EM FARINHAS DE BANANA VERDE

    Directory of Open Access Journals (Sweden)

    Dayana Portes RAMOS

    2010-03-01

    Full Text Available

    Este trabalho teve por objetivo avaliar o teor de amido resistente (AR em farinhas de banana verde produzidas a partir de treze genótipos de bananeira. Para a produção da farinha foram separadas a 1ª, 3ª e 5ª pencas de cada genótipo, na qual cada penca correspondeu a uma repetição. Os frutos de cada penca no estádio 1 (casca completamente verde de maturação foram descascados manualmente, cortados em fatias circulares de 0,5 cm e desidratados em estufa com circulação de ar a 40ºC por 48 horas, sendo em seguida moídos. A análise de AR consistiu em um processo enzimático, calculando-se o conteúdo final pela concentração de glicose liberada. Os resultados foram submetidos à análise estatística e mostraram diferenças significativas para o teor de AR nas farinhas obtidas dos genótipos de bananeira, sendo que a farinha com maior teor de AR foi a produzida a partir do cultivar ‘Nam’ (40,25% e a menor pelo híbrido ‘Fhia 01’ (10,01%. Pode-se concluir que o conteúdo de AR varia em relação ao genótipo utilizado para a confecção da farinha e que a banana pode ser uma boa opção de estudo de alimento funcional.

  14. Isojacareubin from the Chinese Herb <em>Hypericum japonicumem>: Potent Antibacterial and Synergistic Effects on Clinical Methicillin-Resistant <em>Staphylococcus aureusem> (MRSA

    Directory of Open Access Journals (Sweden)

    Gen-Chun Wang

    2012-07-01

    Full Text Available Through bioassay-guided fractionation of the extracts from the aerial parts of the Chinese herb <em>Hypericum japonicumem> Thunb. Murray, Isojacareubin (ISJ was characterized as a potent antibacterial compound against the clinical methicillin-resistant S<em>taphylococcus aureusem> (MRSA. The broth microdilution assay was used to determine the minimal inhibitory concentrations (MICs and minimal bactericidal concentrations (MBCs of ISJ alone. The results showed that its MICs/MBCs ranged from 4/16 to 16/64 μg/mL, with the concentrations required to inhibit or kill 50% of the strains (MIC50/MBC50 at 8/16 μg/mL. Synergistic evaluations of this compound with four conventional antibacterial agents representing different types were performed by the chequerboard and time-kill tests. The chequerboard method showed significant synergy effects when ISJ was combined with Ceftazidime (CAZ, Levofloxacin (LEV and Ampicillin (AMP, with the values of 50% of the fractional inhibitory concentration indices (FICI50 at 0.25, 0.37 and 0.37, respectively. Combined bactericidal activities were also observed in the time-kill dynamic assay. The results showed the ability of ISJ to reduce MRSA viable counts by log10CFU/mL at 24 h of incubation at a concentration of 1 × MIC were 1.5 (LEV, additivity, 0.92 (CAZ, indifference and 0.82 (AMP, indifference, respectively. These <em>in vitroem> anti-MRSA activities of ISJ alone and its synergy with conventional antibacterial agents demonstrated that ISJ enhanced their efficacy, which is of potential use for single and combinatory therapy of patients infected with MRSA.

  15. Problems with EM Algorithms for ML Factor Analysis.

    Science.gov (United States)

    Bentler, P. M.; Tanaka, Jeffrey S.

    1983-01-01

    Rubin and Thayer recently presented equations to implement maximum likelihood estimation in factor analysis via the EM algorithm. It is argued here that the advantages of using the EM algorithm remain to be demonstrated. (Author/JKS)

  16. Integrating Green Purchasing Into Your Environmental Management System (EMS)

    Science.gov (United States)

    The goal of this report is to help Federal facilities integrate green purchasing into their EMS. The intended audience includes those tasked with implementing an EMS, reducing environmental impacts, meeting green purchasing requirements.

  17. Incumprimento do contrato de trabalho em Portugal

    OpenAIRE

    Ferreira, Bruno Miguel Simões

    2011-01-01

    Mestrado em Direito das Empresas Esta tese tem, como objectivo principal, analisar e caracterizar o conceito de contrato de trabalho e as suas tipologias de incumprimento em Portugal. A metodologia consiste na pesquisa bibliográfica nacionalmente aceite, webgrafia, e recurso a dados do INE, DGSI e DGPJ, de modo a elaborar uma análise quantitativa dos tipos de incumprimento do contrato de trabalho e consequentes litígios jurídico/laborais. As hipóteses são: Existe alguma r...

  18. A singularidade do totalitarismo em Hannah Arendt

    Directory of Open Access Journals (Sweden)

    José João Neves Barbosa Vicente

    2011-07-01

    Full Text Available

    A partir da análise da obra <em style="mso-bidi-font-style: normal;">Origens do totalitarismoem> (1990, este artigo apresenta de um modo introdutório, alguns motivos que levaram Hannah Arendt a denominar o totalitarismo de acontecimento singular na história da humanidade.

  19. A singularidade do totalitarismo em Hannah Arendt

    OpenAIRE

    José João Neves Barbosa Vicente

    2011-01-01

    A partir da análise da obra <em style="mso-bidi-font-style: normal;">Origens do totalitarismoem> (1990), este artigo apresenta de um modo introdutório, alguns motivos que levaram Hannah Arendt a denominar o totalitarism...

  20. Modernidade em exposição

    OpenAIRE

    Moreira, Adilson de Souza

    2013-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Urbanismo, História e Arquitetura da Cidade, Florianópolis, 2013. Fixamos nossa atenção à cognição da cidade moderna, a partir de Paris, fruto da Revolução Industrial. Discorremos sobre a evolução dos equipamentos urbanos, em particular a avenida, o saneamento, redes de água, esgoto, eletricidade, vias urbanas, transportes, caracterizando o contexto histórico e social, a formaç...