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Sample records for oleos lubrificantes usados

  1. Argila natural aplicada à clarificação de óleo lubrificante automotivo usado

    Directory of Open Access Journals (Sweden)

    A. E. A. de Lima

    Full Text Available Resumo Argilas para o processo de clarificação são largamente utilizadas na indústria de rerrefino de óleos lubrificantes usados, principalmente por sua capacidade adsorvente de reter impurezas. O presente estudo teve objetivo de determinar as condições ótimas do processo de clarificação de lubrificantes usados a partir de argilas naturais e realizar a recuperação de tais argilas. O processo de rerrefino do lubrificante usado foi otimizado a partir de um planejamento experimental. As argilas recuperadas não apresentaram mudanças significativas em suas estruturas originais, de acordo com as técnicas de difração de raios X, espectroscopia no infravermelho e análise termogravimétrica. Os resultados das caracterizações dos lubrificantes atenderam a portaria ANP nº 130, que regulamenta sua comercialização no país. Todos os solventes foram recuperados por destilação a vácuo.

  2. Bioestímulo e bioaumento na remediação de solo contaminado com óleo lubrificante usado escala piloto

    OpenAIRE

    Graciane Silva

    2010-01-01

    O óleo lubrificante mineral é amplamente utilizado no cenário mundial no funcionamento de máquinas e motores. No entanto, o ciclo de vida deste petro-derivado resulta na geração de um resíduo (óleo lubrificante usado), o qual é nocivo ao meio ambiente quando não descartado adequadamente ou reciclado. No Brasil, apesar das normas que tratam especificamente do armazenamento, recolhimento e destino de óleo lubrificante usado, grande parte do mesmo ainda é despejado diretamente no meio ambiente, ...

  3. Avaliação do sistema de gerenciamento de óleos lubrificantes usados ou contaminados no Brasil

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    Malaquias Zildo António Tsambe

    2017-07-01

    Full Text Available A crescente conscientização em relação ao desenvolvimento tecnológico que atenda as questões relacionadas à sustentabilidade constitui um marco importante para a garantia da satisfação socioeconômica e ambiental. A Política Nacional de Resíduos Sólidos (PNRS e a resolução 362/2005 do Conselho Nacional de Meio Ambiente (CONAMA são alguns dos instrumentos legais que garantem a materialização parcial dessa conscientização. O presente estudo avalia o estágio atual do sistema de gerenciamento do Óleo Lubrificante Usado ou Contaminado (OLUC, discute a legislação vigente para o setor e as tecnologias usadas para o seu reaproveitamento. O gerenciamento adequado do OLUC é fundamental para evitar o conjunto de problemas ambientais resultantes do seu descarte inadequado, como a contaminação da água, do solo e do ar. Atualmente, o Brasil é o sexto maior consumidor mundial de óleos lubrificantes, consequentemente, o sexto maior produtor de OLUC, com uma produção de cerca de um milhão de litros/ano. O País atingiu a capacidade de coleta de 38,5%, considerada satisfatória de acordo com a meta de coleta mínima estabelecida pela UNEP e pela resolução 362/2005 do CONAMA. Os resultados sustentam a necessidade de melhorar o gerenciamento do OLUC, desde as questões socioeconômicas às ambientais. Existe a necessidade urgente de fiscalizar e monitorar a atividade a fim de minimizar os impactos causados pela destinação inadequada de OLUC.

  4. Análise da Geração de Resíduos em Filtros Lubrificantes Automotivos Usados no Estado de Goiás

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    Juarez de Morais

    2018-02-01

    Full Text Available O setor automotivo é responsável pela geração de resíduos de várias naturezas e que, por força de leis de proteção ambiental, devem ser destinados adequadamente. Neste trabalho foram analisados materiais contaminados por hidrocarbonetos, especificamente o óleo residual resultante das trocas e os componentes de filtros lubrificantes de veículos das montadoras Fiat, Honda e Iveco. Os dados foram coletados em concessionárias localizadas no Estado de Goiás, entre 2014 e 2015. As variáveis analisadas foram: óleo lubrificante novo utilizado nos veículos e óleo usado residual, o tamanho da frota de veículos nacionais e goiana, quantificação dos resíduos componentes do filtro lubrificante, com estimativas para Brasil e Goiás. Os resultados evidenciaram que o montante de óleo usado e contaminado pela frota veicular é elevado e requer destinação adequada por meio de logística reversa, bem como novas tecnologias dos componentes veiculares, em especial do filtro de óleo, para mitigar os impactos do setor.

  5. Óleos lubrificantes usados – evolução das responsabilidades pela coleta/destinação e alternativas para aplicações: uma contribuição para a tecnologia de produção mais limpa

    Directory of Open Access Journals (Sweden)

    Sérgio Pereira Távora

    2003-03-01

    Full Text Available Como contribuição à tecnologia de produção mais limpa este artigo apresenta uma discussão sobre a legislação ambiental brasileira, referente à coleta e destinação de óleos usados/contaminados, comentando sobre as responsabilidades que foram atribuídas aos setores envolvidos no ciclo de vida dos óleos lubrificantes acabados, durante todo o período analisado. Além dos aspectos legais, o artigo discorre, resumidamente, sobre o ciclo de vida dos óleos lubrificantes, o que culmina na geração dos óleos usados, abordando desta forma a questão técnica do tema. Palavras-chaves: óleo usado, rerrefino, coleta, destinação, legislação ambiental

  6. Simulação do processo de desasfaltação de petroleo pesado para obtenção de asfaltenos e oleo lubrificante

    OpenAIRE

    Filipe Augusto Barral Quirino

    2009-01-01

    Resumo: A desasfaltação do petróleo é um dos principais processos primários no refino de óleo cru. O estudo do processo de desasfaltação tem merecido atenção considerável nas últimas décadas, devido ao aumento das reservas de óleos crus pesados. No Brasil, grande parte das reservas exploradas produz óleos pesados, uma vez que a crescente redução no processamento de petróleos leves aliada à crescente demanda por combustíveis e lubrificantes de melhor qualidade força a indústria nacional de pet...

  7. Inorganic elements and organic compounds degradation studies by gamma irradiation in used lubricating oils; Estudos de remocao de elementos inorganicos e degradacao de compostos organicos por radiacao gama em oleos lubrificantes usados

    Energy Technology Data Exchange (ETDEWEB)

    Scapin, Marcos Antonio

    2008-07-01

    The automotive lubricating oils have partial degradation of organic compounds and addition of undesirable inorganic elements, during its use. These substances classify the used lubricating oils as dangerous and highly toxic. According to global consensus, concerning the environmental conservation, the best is to perform a reuse treatment of these lubricating oils. For this purpose, the uses of an alternative and effective technology have been sought. In this work, the efficacy and technical feasibility of the advanced oxidation process (AOP), by gamma radiation, for used automotive lubricating oil treatment has been studied. Different quantities of hydrogen peroxide and water Milli-Q were added to oil samples. They were submitted to the Cobalt-60 irradiator, type Gammacell, with 100, 200 and 500 kGy absorbed doses. The inorganic analysis by X-ray fluorescence (WDXRF) showed inorganic elements removal, mainly to sulphur, calcium, iron and nickel elements at acceptable levels by environmental protection law for oils reusing. The gas chromatography (GC/MS) analysis showed that the advanced oxidation process promotes the organic compounds degradation. The main identified compounds were tridecane, 2-methyl-naphthalene, and trietilamina-tetramethyl urea, which have important industrial applications. The multivariate analysis, Cluster Analysis, showed that advanced oxidation process application is a viable and promising treatment for used lubricating oil reusing. (author)

  8. Determinação de contaminantes em óleos lubrificantes usados e em esgotos contaminados por esses lubrificantes

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    Eva Lúcia Cardoso Silveira

    2006-12-01

    Full Text Available A simple and reliable ashing procedure is proposed for the preparation of used lubricating oil samples for the determination of Zn, Fe, Pb, Ni and Cu by the flame atomic absorption spectrometry technique. Sulphanilic acid was added to oil samples, the mixture coked and the coke ashed at 550 ºC. The solutions of the ash were analysed by flame AAS for these metals. The quantification limits were 38.250 µg g-1 for Zn, 4.550 µg g-1 for Fe, 1.562 µg g-1 for Pb, 1.450 µg g-1 for Ni, and 0.439 µg g-1 for Cu. The determinations, in lubricating oil, showed good precision and accuracy with recoveries between 90 and 110 %, indicating a negligible matrix effect in the experiments using addition of analyte, with relative standard deviation lower than 5%. The results for analysis of wastewater contamined by theses lubricants showed a very high relative standard deviation.

  9. Utilização de óleos vegetais como bases lubrificantes

    OpenAIRE

    Matos, Paulo Roberto Rodrigues de

    2011-01-01

    A demanda dos óleos lubrificantes é cada vez maior na crescente economia brasileira. A utilização de bases vegetais em substituição às minerais poderá trazer benefícios socioeconômicos e ambientais para o país. O objetivo deste trabalho foi verificar a capacidade lubrificante de óleos vegetais e adequá-los em função do seu uso potencial como lubrificante, tendo em vista a variedade de aplicações possíveis. Espera-se com isso obter alguns lubrificantes de base vegetal específicos para aplicaçõ...

  10. Estudo da aplicabilidade dos conceitos da manufatura sustentável no rerrefino de óleos lubrificantes usados

    OpenAIRE

    Machado, Carla Gonçalves [UNESP

    2011-01-01

    Diante das novas demandas em prol do desenvolvimento sustentável, é comum ouvir as empresas falando em produtos sustentáveis, em produção verde. Mas para que essas afirmações sejam realidade existe a necessidade urgente de que as empresas compreendam e incorporem a visão da sustentabilidade aos seus negócios. O objetivo dessa dissertação é apresentar e relacionar os princípios e escopo da Manufatura Sustentável, alinhando-os aos indicadores do Global Reporting Initiative (GRI), demonstrando a...

  11. Simulation of distillation in structured packing column to o obtain lube oils; Simulacao de uma coluna de destilacao com recheio estruturado para a obtencao de oleos lubrificantes

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Rodrigo S.; Nicolaiewsky, Elioni M.A.; Mendes, Marisa F. [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil)

    2008-07-01

    The present work aims for the simulation of a laboratorial distillation column, operating continuously at vacuum conditions, in order to obtain basic lubricating oils. The feed is a mixture of light neutral, medium distillate and bright stock, aiming to produce light neutral as the top product, the medium distillate in the side stream and bright stock in the bottom. The simulation was performed using PRO II software in order to establish the best operating conditions. This work was based in a previous simulation using the same column with 20 theoretical trays, in order to obtain the medium distillate and bright stock at the top and bottom respectively, without the side stream. The simulations were performed varying the feed flow of 1 and 3 Kg/h, entering in the middle or at the bottom of the column, the operational pressure of 7 and 10mbar and the reflux ratio of 3 and 5, using the true boiling point curve - TBP of the feed, with an initial boiling point of 378.9 deg C and end boiling point of 598.3 deg C. (author)

  12. Increase base oil production using new technology for dewaxing aid; Desenvolvimento de novo aditivo para o processo de desparafinacao promove aumento da producao de oleos lubrificantes

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Anita E.F.; Lima, Anie D. M.; Parauta, Cintia C. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES); Freitas, Luis F.; Pires, Felipe de F.; Junior, Adalberto F.; Santos, Claudio A.P. [PETROBRAS S.A., Duque de Caxias, RJ (Brazil). Refinaria Duque de Caxias (REDUC)

    2008-07-01

    PETROBRAS produces simultaneously lubricant base oils and waxes in two of its refineries: Duque de Caxias (REDUC) and Landulpho Alves (RLAM). REDUC is the biggest in terms of volume output, contributing approximately with 78% of the national base oil production and 20% of wax. Unlike the RLAM refinery, which processes only Brazilian national crude, REDUC refinery processes imported paraffinic crude in a conventional refining scheme known as solvent route. Dewaxing is one of the most expensive steps in the solvent route used for the paraffin and oil separation. With the objective of improving the performance of this stage, traditionally high molecular weight polymer additives are mixed to the feedstock. This study presents the results that prove that investments in the development of new additives, which promote increases in the unit's production rate and enhance operational flexibility compared to tests without additives. One of these new additives also provides environmental benefits because it is made without aggressive products such as toluene. A modest investment in research studies increased production of base oil with existing plant and significantly increased the profitability of the REDUC lubricant unit. (author)

  13. Research of Brazilian crude in pilot plant for base oil production; Pesquisa em planta piloto visando valorizar o cru nacional na producao de oleos lubrificantes

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Anita E.F.; Nogueira, Wlamir S.; Ximenes, Lelia M. de O. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES); Santos, Claudio A.P. dos [Fundacao Gorceix, Ouro Preto, MG (Brazil)

    2004-07-01

    One of the biggest challenges for PETROBRAS is to find alternative crude oils to produce base oil and wax in its refinery. Duque de Caxias refinery has been using imported crude oil for 31 years living with constants threats to continuity because of the Persian Gulf conflicts. If we analyze the profitability of this business, we can verify that the lubes complex had contributed for the profitability by about 41,9% in 2002, even using imported crude oil. So, if we can incorporate a national crude oil in the actual refinery scheme, we would produce besides strategic gains better profitability for the base oil and wax unit. This paper describes a series of tests performed in the pilot plant, in which we produced base oils and wax using a mixture of imported crude with Brazilian crude oil. The base oils produced were classified as Group I with lower aromatic, Sulphur and basic Nitrogen content. Another great advantage of this alternative is that the light fractions obtained from distillation step can be used as feed to make fuels of better quality, due to the lower sulphur content, thus also reducing the environmental impact. (author)

  14. Demulsification of residual waters from refining industries of lubricant oil: case study; Desemulsificacao de aguas residuarias de industrias de refino de oleo lubrificante: estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Sawamura, Marcia Yumi; Morita, Dione Mari [Sao Paulo Univ., SP (Brazil). Escola Politecnica. Dept. de Engenharia Hidraulica e Sanitaria]. E-mail: dmmorita@usp.br

    1997-07-01

    The present work aims to evaluate the coagulation, flocculation with iron chloride (FeCl{sub 3}.6H{sub 2}O), followed by phase separation, as alternative for treating residual waters from lubricant oil refining industries. Tests have been performed by using {sup j}ar test{sup ,} changing pH value and coagulants for various wastewater characteristics.

  15. Empirical modeling of a dewaxing system of lubricant oil using Artificial Neural Network (ANN); Modelagem empirica de um sistema de desparafinacao de oleo lubrificante usando redes neurais artificiais

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Cristiano Hora de Oliveira; Medeiros, Ana Claudia Gondim de; Silva, Marcone Lopes; Neves, Sergio Bello; Carvalho, Luciene Santos de; Guimaraes, Paulo Roberto Britto; Pereira, Magnus; Vianna, Regina Ferreira [Universidade Salvador (UNIFACS), Salvador, BA (Brazil). Dept. de Engenharia e Arquitetura]. E-mail: paulorbg@unifacs.br; Santos, Nilza Maria Querino dos [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)]. E-mail: nilzaq@petrobras.com.br

    2003-07-01

    The MIBK (m-i-b-ketone) dewaxing unit, located at the Landulpho Alves refinery, allows two different operating modes: dewaxing ND oil removal. The former is comprised of an oil-wax separation process, which generates a wax stream with 2 - 5% oil. The latter involves the reprocessing of the wax stream to reduce its oil content. Both involve a two-stage filtration process (primary and secondary) with rotative filters. The general aim of this research is to develop empirical models to predict variables, for both unit-operating modes, to be used in control algorithms, since many data are not available during normal plant operation and therefore need to be estimated. Studies have suggested that the oil content is an essential variable to develop reliable empirical models and this work is concerned with the development of an empirical model for the prediction of the oil content in the wax stream leaving the primary filters. The model is based on a feed forward Artificial Neural Network (ANN) and tests with one and two hidden layers indicate very good agreement between experimental and predicted values. (author)

  16. Antibacterial activities of some constituents from oleo-gum-resin of Commiphora mukul.

    Science.gov (United States)

    Saeed, M Asif; Sabir, A W

    2004-03-01

    The essential oil, chloroform extract and seven sesquiterpenoids compounds newly isolated from the oleo-gum-resin of Commiphora mukul showed a wide range of inhibiting activity against both Gram (+) and Gram (-) bacteria.

  17. Volume da gota dos colírios lubrificantes: estudo farmacoeconômico

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    Alexandre Xavier da Costa

    2015-12-01

    Full Text Available RESUMO Objetivo: Determinar o volume médio das gotas produzidas pelos colírios lubrificantes em diferentes ângulos de inclinação e determinar o custo médio do tratamento. Métodos: Determinação do volume da gota de 3 frascos originais dos colírios lubrificantes Artelac®, Hylo Comod®, Lacrima® Plus, Systane® UL, Lacrifilm®, Hyabak®, Lacribell®, Ecofilm®, Mirugell®, Plenigell®, Fresh Tears®, Optive® e Endura® à inclinação de 90º e 45º. Determinou-se o número médio de gotas em cada frasco e foi feita avaliação farmacoeconômica dos colírios. Resultados: O volume das gotas variou de 32,2 a 64,0 µL a 45o e de 29,1 a 65,1 µL a 90o. A diferença entre as gotas em cada inclinação foi de 2 a 24% e o custo anual dos colírios de acordo com a inclinação variou de R$2,73 a R$130,73. A Duração Máxima de Tratamento (DMT foi de 29,3 a 51,4 dias na inclinação de 45o, e de 28,8 a 48,4 dias a 90º, sendo que a diferença na DMT foi de 0,5 até 8 dias a mais ou a menos, de acordo com a marca. Conclusão: Nenhum dos colírios estudados apresentou gotas ideais para o olho humano, levando a um desperdício do produto e maior custo para o fabricante e para o consumidor. Percebemos que existe uma variação significativa no volume da gota de acordo com a inclinação do frasco, e que uma variação maior do que 10% traria impactos financeiros para o paciente.

  18. El aceite usado de motor como combustible alternativo

    OpenAIRE

    Coronado, Marcelo

    2016-01-01

    La inadecuada gestión del aceite usado origina una serie de problemas ambientales dentro de los cuales podríamos citar los siguientes: - Si el aceite usado es vertido al suelo, este destruye el humus, mata la materia viva que hay en el suelo y disminuye su fertilidad. Por infiltración contamina las aguas subterráneas haciéndolas inadecuadas para el uso humano.

  19. Degradação de óleos lubrificantes em motores estacionários movidos a biogas

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    Djessica Brum

    2018-01-01

    Full Text Available Com o crescente interesse do uso de biogás como fonte de energia elétrica por meio de motores ciclo Otto, as condições de trabalho destes motores se tornam relevantes para maior eficiência de conversão energética e maior tempo de uso. A utilização correta de óleos lubrificantes permite ampliar a quantidade de horas motor, sem necessidade de troca. Avaliar a qualidade e a degradação dos óleos lubrificantes neste sistema torna-se uma premissa importante, uma vez que o óleo degradado diminui a capacidade de proteção nas peças móveis do motor e aumenta o superaquecimento do sistema. A contaminação por agentes externos eleva a chance do desenvolvimento de borras e aumentando a corrosão de peças. Este trabalho realizou o controle de qualidade de óleos lubrificantes em motores estacionários movidos a biogás. Os óleos foram analisados por espectrofotometria na região do infravermelho, na qual foram verificadas as bandas de oxidação, presença de água, fuligem, nitratos e sulfato, sendo determinada também a acidez total do óleo lubrificante, de acordo com a norma ASTM D4739, preconizada pela Resolução ANP nº 10/2000. O principal problema encontrado foi a quantidade de água presente nos motores, acima do limite de 0,03%, indicando algum problema de vazamento/contaminação no motor. Os testes controlados com diferentes gases apresentaram pouca variação em relação à comparação com ar, ao controle utilizado e ao gás N2, sendo que os principais parâmetros afetados foram a oxidação e a acidez, pois os outros parâmetros não apresentaram diferenças significativas entre si.

  20. Neuropharmacological screening of essential oil from oleo gum resin of Gardenia lucida Roxb.

    Science.gov (United States)

    Shareef, Mohammad Zubair; Yellu, Narsimha Reddy; Achanta, Venkata Narsimha Appa Rao

    2013-10-07

    The oleo gum resin of Gardenia lucida is commonly employed in traditional medicine to treat multiple ailments, including epilepsy and mania. The essential oil isolated from it was screened for CNS activities to check if it is responsible for the claims made regarding the traditional use of the oleo gum resin. The hypnotic and anticonvulsant activity was assessed by pentobarbitone induced hypnosis and convulsant models-Maximum electroshock (MES) and Pentylene tetrazole (PTZ) respectively. Effect on motor activity was evaluated using an actophotometer, rotarod and grip strength methods. The oil significantly potentiated the barbitone induced hypnosis and offered significant protection against the intensity and frequency of convulsions and mortality rate in both the convulsant models. A significant decrease in locomotion, motor impairment and loss of gripping reflex was also observed. The essential oil of the oleo gum resin of Gardenia lucida is a CNS depressant and anticonvulsant with central muscle relaxant properties. This justifies the claims made regarding the use of the oleo gum resin of Gardenia lucida in CNS disorders. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  1. Irritant potential of some constituents from oleo-gum-resin of Commiphora myrrha.

    Science.gov (United States)

    Saeed, M Asif; Sabir, A W

    2004-01-01

    The irritant potentials of essential oil and seven sesquiterpenoids compounds newly isolated from the oleo-gum-resin of Commiphora myrrha were investigated by open mouse ear assay. The essential oil, curzerenone, furanodiene-6-one and furanoeudesma-1,3-diene showed potent and persistent irritant effects while others possess least irritant potentials.

  2. Rheology of oleo gels based on sorbitan and glyceryl mono stearates and vegetable oils for lubricating applications

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez, R.; Franco, J. M.; Delgado, M. A.; Valencia, C.; Gallegos, C.

    2011-07-01

    Oleo gels based on sorbitan and glyceryl mono stearates and different types of vegetable oils, potentially applicable as biodegradable alternatives to traditional lubricating greases, have been studied. In particular, the rheological behavior, by means of small-amplitude oscillatory shear (SAOS) measurements, and some lubrication performance-related properties (mechanical stability and tribological response) have been evaluated in this work. SAOS response and mechanical stability of these oleo gels are significantly influenced by the type and concentration of the organogelator and the vegetable oil used in the formulations. Glyceryl monostearate (GMS) generally produces stronger gels than sorbitan monostearate (SMS). The use of low-viscosity oils, such as rapeseed and soybean oils, yields gels with significantly higher values of the linear viscoelastic functions than oleo gels prepared with high-viscosity oils, i.e. castor oil. The rheological behavior of SMS-based oleo gels also depends on the cooling rate applied during the gelification process. On the other hand, the oleo gels studied present low values of the friction coefficient obtained in a tribological contact, although only some GMS/castor oil-based oleo gels exhibit a suitable mechanical stability. (Author) 28 refs.

  3. Globalización y territorio usado: imperativos y solidaridades

    OpenAIRE

    Silveira, María Laura

    2008-01-01

    Este ensayo discute el territorio usado como categoría importante de la geografía y de la teoría social en la comprensión de las naciones. Ilustrando con algunas situaciones brasileñas, se tejen consideraciones sobre las relaciones entre Estado y mercado, con énfasis en la dinámica actual de las grandes empresas y del poder público. Tecnociencia, información y finanzas configuran la división territorial del trabajo hegemónica en el período de la globalización y participan, junto al consumo, c...

  4. Logística reversa dos pneus usados no Brasil

    OpenAIRE

    Lagarinhos,Carlos A. F.; Tenório,Jorge A. S.

    2013-01-01

    Após a aprovação da Resolução CONAMA (Conselho Nacional do Meio Ambiente) nº 258/99, ocorreu um avanço significativo na reciclagem de pneus no Brasil, com o desenvolvimento de tecnologias para reutilização, reciclagem e valorização energética. Em 2009, foi aprovada a Resolução CONAMA nº 416/09 que muda a forma de cálculo para a reciclagem, de pneus produzidos para venda no mercado de reposição. O objetivo principal deste trabalho é apresentar a logística reversa dos pneus usados no Brasil e c...

  5. Gerenciamento de embalagens de lubrificantes pós-consumo - Uma análise crítica

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    Harley M. Martins

    2016-10-01

    Full Text Available Este trabalho apresenta uma avaliação das sistemáticas atualmente praticadas no município do Rio de Janeiro para tratamento e disposição de embalagens pós-consumo de lubrificantes automotivos. O diagnóstico foi realizado através de pesquisa de campo com entrevista estruturada e visita às instalações de pontos de geração, centrais de triagem e recicladoras desse tipo de resíduo. Os resultados obtidos tornam evidente que os programas de logística reversa implantados no município em estudo apresentam deficiências significativas no que tange, principalmente, às sistemáticas para separação da fração oleosa do resíduo plástico e armazenamento temporário, com consequências diretas associadas ao transporte seguro e a viabilidade do processo de reciclagem. Os dados demonstram lapso entre as práticas vigentes e os preceitos preconizados pela Política Nacional de Resíduos Sólidos, especificamente no que tange ao inciso IV, artigo 33, Lei 12.305/10.

  6. Gerenciamento de embalagens de lubrificantes pós-consumo - Uma análise crítica

    Directory of Open Access Journals (Sweden)

    Harley M. Martins

    2015-07-01

    Full Text Available Este trabalho apresenta uma avaliação das sistemáticas atualmente praticadas no município do Rio de Janeiro para tratamento e disposição de embalagens pós-consumo de lubrificantes automotivos. O diagnóstico foi realizado através de pesquisa de campo com entrevista estruturada e visita às instalações de pontos de geração, centrais de triagem e recicladoras desse tipo de resíduo. Os resultados obtidos tornam evidente que os programas de logística reversa implantados no município em estudo apresentam deficiências significativas no que tange, principalmente, às sistemáticas para separação da fração oleosa do resíduo plástico e armazenamento temporário, com consequências diretas associadas ao transporte seguro e a viabilidade do processo de reciclagem. Os dados demonstram lapso entre as práticas vigentes e os preceitos preconizados pela Política Nacional de Resíduos Sólidos, especificamente no que tange ao inciso IV, artigo 33, Lei 12.305/10.

  7. Pharmacology and Phytochemistry of Oleo-Gum Resin of Commiphora wightii (Guggulu

    Directory of Open Access Journals (Sweden)

    Prerna Sarup

    2015-01-01

    Full Text Available Guggulu is an oleo-gum resin which exudes out as a result of injury from the bark of Commiphora wightii (Arnott Bhandari [syn.  Commiphora mukul (Hook. Ex Stocks Engl; Balsamodendron mukul (Hook. Ex Stocks; Family, Burseraceae]. It has been used in the Ayurveda since time immemorial for the treatment of variety of disorders such as inflammation, gout, rheumatism, obesity, and disorders of lipids metabolism. It is a mixture of phytoconstituents like volatile oil which contains terpenoidal constituents such as monoterpenoids, sesquiterpenoids, diterpenoids, and triterpenoids; steroids; flavonoids; guggultetrols; lignans; sugars; and amino acids. This review is an effort to compile all the information available on all of its chemical constituents which are responsible for its therapeutic potential. The wild occurrence of this species is restricted mainly to the dry regions of Rajasthan and Gujarat States of India, and the bordering regions of Pakistan. Oleo-gum resin, guggulu, tapped from the stems of this species, is consumed in high volumes by the Indian herbal industries. There has been a decline in its wild population over the last several decades, as a result of habitat loss and degradation, coupled with unregulated harvesting and tapping of oleo-gum resin. This species is consequently assessed as Critically Endangered and enlisted in the IUCN red list of threatened species.

  8. Modificação superficial de adsorventes para a adsorção de dibenzotiofeno presente em óleo lubrificante

    OpenAIRE

    Fontana, Josilma Fatima

    2016-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2016. Com o intuito de alcançar as metas estabelecidas na remoção de enxofre de óleos lubrificantes, estudos vêm sendo realizados visando aperfeiçoar o processo de purificação de combustíveis através de melhorias de processos tradicionais de hidrotratamento (HDT), bem como o desenvolvimento de novas tecnologias. A presença de compostos orgânicos de ...

  9. Production of Group II and III base oils by hybrid route using brazilian crude; Producao de oleos basicos lubrificantes dos grupos II e III pela rota hibrida ou mista a partir de petroleo brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Wlamir Soares; Fontes, Anita Eleonora Ferreira [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    This paper describes a series of pilot plant tests made at PETROBRAS Research Centre, considering hydrotreatment and solvent dewaxing steps, to produce group II and group III lube base oils from Baiano Light crude feeds (Brazilian crude). RLAM Refinery has been using Baiano light crude to produce group I base oils by conventional route and in the pilot plant studies, two types of process scheme were tested. In the first one, an industrial run was performed at RLAM Refinery, including distillation, dewaxing and extraction and the light raffinate was used as a feed for a hydrotreatment pilot plant, followed by a distillation to remove the front ends. In the second scheme, another industrial run was performed, including distillation and dewaxing steps and the medium dewaxed oil was used as a charge for a hydrotreatment followed by distillation and dewaxing pilot plant tests. Products of excellent quality were obtained. Due to their high viscosity indexes (from 96 to 126), low contaminants levels (sulfur < 5 ppm and nitrogen < 5 ppm) and low aromatic content (CA < 2 %), the lube base oils produced are therefore classified as group II and group III. The main advantages of this route are related to the base oils quality improvements with low investment and more flexibility in terms of crude source. (author)

  10. Thermal degradation of a synthetic lube oil API SL/CF SAE 5W 40; Degradacao termica do oleo lubrificante sintetico API SL/CF SAE 5W 40

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Eddy H. de O.; Carvalho, Laura H. de; Silva, Everson de L. [Universidade Federal de Campina Grande (UFCG), PB (Brazil)

    2008-07-01

    This work deals with the thermal degradation to 210 deg C of lubricating oil synthetic API SL/CF SAE 5W 40 as received and on the presence of metallic particles, from engine parts (head and crankshaft). Samples were collected at various intervals of time. The metallic particles were spent in mesh sieve no. 200 (0.074 mm) and used both in the trials of characterization (EDX and SEM) as the thermal degradation of the oil. Changes in rheology, viscosity, density, color and FTIR were monitored over time of heat exposure. The results indicate that thermal exposure caused by thermal oxidation of synthetic oil and that the presence of metallic particles (10 ppm) accelerated this process, so it is suggested that during the exchange of oil are taken care to remove them from to prevent the premature deterioration of the new oil. The behaviour Newtonian was maintained throughout the period degradation and viscosity of the oil has not changed significantly even after long periods (1148 hours) of thermal exposure. Despite the density of oil also has not changed significantly with time of exposure, changes in color indicate that chemical changes occurred, which was detected by FTIR. (author)

  11. Remoção da fração oleosa de embalagens de lubrificantes automotivos pós-consumo por drenagem gravitacional

    Directory of Open Access Journals (Sweden)

    Harley Moraes Martins

    Full Text Available RESUMO: Este trabalho aborda a questão do gerenciamento de embalagens pós-consumo de lubrificantes automotivos, considerando as dificuldades inerentes à implementação do sistema de logística reversa - prática compulsória por força de lei (Brasil, Lei 12.305/2010 - e a ineficácia dos atuais métodos utilizados para remoção da fração oleosa residual, necessária ao reprocessamento do material plástico por reciclagem mecânica direta. Para determinar metodologia apropriada para limpeza dos frascos de lubrificantes foram conduzidos experimentos para avaliar a influência do aquecimento e da posição das embalagens durante o processo de drenagem gravitacional. O procedimento analítico realizado proporcionou a escolha de uma combinação de variáveis capaz de assegurar remoção de elevado teor do resíduo oleoso com menor gasto energético. A otimização foi feita utilizando um planejamento experimental do tipo composto central com triplicata no ponto central. Os dados obtidos nos ensaios foram analisados com recursos estatísticos e demonstraram que ambos os parâmetros avaliados interferem, de forma significativa, no processo em estudo. Os resultados apontaram aumento da eficácia do processo quando a drenagem é realizada em temperaturas superiores a 35ºC e com a embalagem inclinada em ângulos próximos a 70º em relação à horizontal. Nessas condições, percentuais de remoção de óleo residual superaram 95% após 35 minutos de drenagem.

  12. Estudio de la obtención de biodiesel a partir de aceite comestible usado

    OpenAIRE

    García-Díaz, Marilin; Gandón-Hernández, José; Maqueira-Tamayo, Yudisel

    2013-01-01

    Nuestro país actualmente no cuenta con una estrategia para utilizar racionalmente el volumen de aceite vegetal usado que se genera en la industria alimentaria y el sector turístico proveniente del proceso de fritura, es por eso que el presente trabajo tiene como objetivo estudiar la obtención del biodiesel a partir de aceites comestibles usados y metanol. Las cantidades de aceite y reactivos para que se desarrolle la reacción de transesterificación, mediante la cual se obtiene biodiésel y gli...

  13. Pengaruh Kecerdasan Intelektual terhadap Kinerja Akuntan Pendidik pada Jurusan Akuntansi Fakultas Ekonomi dan Bisnis Universitas Halu Oleo

    OpenAIRE

    Akib, Mulyati; Asni, Nur

    2016-01-01

    This research aimed of presented to examine the effect of intellectual intellegence on the performance of educator accountant. Primary data in this research were obtained from the perseption off all lecturers and 76 generation students majoring 2013/2014 in Departement of Accountancy Economy faculty and Business Halu Oleo University. Preceptions in measured by responses to ques tionnaires that uses ordinal measurement with a 5 point Likert scale. The analytical tool used to test the hypotesis...

  14. Utilization of oleo-chemical industry by-products for biosurfactant production

    Science.gov (United States)

    2013-01-01

    Biosurfactants are the surface active compounds produced by micro-organisms. The eco-friendly and biodegradable nature of biosurfactants makes their usage more advantageous over chemical surfactants. Biosurfactants encompass the properties of dropping surface tension, stabilizing emulsions, promoting foaming and are usually non- toxic and biodegradable. Biosurfactants offer advantages over their synthetic counterparts in many applications ranging from environmental, food, and biomedical, cosmetic and pharmaceutical industries. The important environmental applications of biosurfactants include bioremediation and dispersion of oil spills, enhanced oil recovery and transfer of crude oil. The emphasis of present review shall be with reference to the commercial production, current developments and future perspectives of a variety of approaches of biosurfactant production from the micro-organisms isolated from various oil- contaminated sites and from the by-products of oleo-chemical industry wastes/ by-products viz. used edible oil, industrial residues, acid oil, deodorizer distillate, soap-stock etc. PMID:24262384

  15. Variação do volume de gotas de colírios lubrificantes disponíveis no mercado brasileiro

    Directory of Open Access Journals (Sweden)

    Vitorugo Silvestre Nascimento

    Full Text Available RESUMO Objetivo: Avaliar a variação intra e interexaminadores do volume de gotas dispensados de frascos de colírios lubrificantes disponíveis no mercado. Métodos: Foram estudados cinco frascos de colírios lubrificantes e dezenove voluntários participaram deste estudo. A massa média de gotas de 20µl dos colírios foi obtida utilizando micropipeta e balança de precisão e como padrão para comparação com a massa das gotas obtidas pelos voluntários. Cinco gotas de cada frasco foram pesadas individualmente com o tubo de colírio perpendicular à balança, usando o primeiro e segundo dedos da mão direita, de forma que a pressão fosse aplicada somente no meio do frasco. Os experimentos foram realizados em uma sala climatizada a temperatura ambiente (21±1°C. Resultados: Todos os frascos de colírios apresentaram variação estatisticamente significante das massas das gotas obtidas pelos examinadores quando comparadas com a massa média padrão de 0,0182±0,0014g, com exceção da comparação entre os dados do colírio A com o colírio D, que não apresentou variação estatisticamente significante. Conclusão: O presente estudo demonstra a ausência de uniformidade das gotas dispensadas pelos frascos de colírios disponíveis no mercado e a sua inadequação à real necessidade, uma vez que as gotas dispensadas são maiores do que o indicado. Esse fato torna-se um problema quando se trata de período de tratamento prolongado, especialmente com colírios dispendiosos como os indicados para a terapêutica do glaucoma. Nesse sentido, a padronização das gotas de colírios se faz necessária.

  16. Avaliação do gerenciamento de resíduos de óleos lubrificantes e suas embalagens em oficinas mecânicas da cidade de Pombal – PB, Brasil

    Directory of Open Access Journals (Sweden)

    Michel Almeida da Silva

    2014-09-01

    Full Text Available As oficinas mecânicas de veículos automotivos são empreendimentos geradores de um volume considerável de resíduos de óleos lubrificantes e de suas embalagens, os quais podem causar alterações significativas no meio ambiente quando gerenciados de modo inadequado. O presente trabalho teve por objetivo realizar uma avaliação ambiental com respeito à geração, armazenamento, coleta, transporte, tratamento e disposição final dos resíduos de óleos lubrificantes e de suas embalagens gerados por meio das atividades desenvolvidas em oficinas mecânicas da cidade de Pombal - PB. Esse estudo foi motivado pelo notável aumento da frota de veículos automotivos na cidade, e, por consequência, pelo crescimento da procura por serviços de oficinas mecânicas. O método de avaliação fundamentou-se num levantamento de informações documentais e de campo por meio da aplicação de questionários, bem como nas análises das instalações físicas das 10 oficinas visitadas, que foram escolhidas de forma aleatória e estão distribuídas em diferentes bairros da cidade. Com base nos resultados obtidos, foi possível notar que há uma urgente necessidade de um adequado gerenciamento dos resíduos de óleos lubrificantes e de suas embalagens nas oficinas mecânicas da cidade de Pombal - PB.

  17. PROPUESTA DE MINIMIZACIÓN DEL IMPACTO AMBIENTAL PRODUCIDO POR VERTIDOS DE ACEITES VEGETALES USADOS

    Directory of Open Access Journals (Sweden)

    Héctor Chamorro

    2006-04-01

    Full Text Available Este artículo Desarrolla una propuesta para minimizar el impacto ambiental producido por los vertidos de los aceites vegetales usados (AVU a las redes de aguas de desecho municipales, vertederos, rellenos sanitarios, cuerpos de aguas naturales. . Se determinó y cuantificó el universo de potenciales suplidores de aceites vegetales usados en la ciudad de Puerto Ordaz, Con los AVU se producirá un combustible ecológico, a través de la transesterificación de esteres. Se diseño y construyo una planta piloto para estudiar las reacciones químicas involucradas en el proceso y la producción del combustible ecológico (BIODIESEL, que podrá ser utilizado en cualquier motor Diesel.

  18. Aprimoramento da técnica da mínima quantidade de lubrificante (MQL) no processo de retificação cilíndrica externa de mergulho de aços endurecidos

    OpenAIRE

    Oliveira, Danilo de Jesus [UNESP

    2011-01-01

    A aplicação mínima da quantidade de lubrificante (MQL) na usinagem dos metais surgiu como uma alternativa para reduzir a abundância de fluidos de corte e, com isso, atingirn produção mais limpa. Na retificação, apesar de ser considerada uma técnica inovadora no aspecto ambiental, sua aplicação é restrita devido à geração excessiva de calor e ao entupimento dos poros do rebolo causado pelos cavacos, prejudicando a qualidade final do produto e aumentando o desgaste da ferramenta. Esta pesquisa ...

  19. Characterization of Paraiba state, Brazil, clays used for clearing of oil of frying for application as bio fuel; Cacterizacao de argilas do estado da Paraiba, Brasil, utilizaadas para clareamento de oleos de fritura usados para aplicacao como biobombustivel

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, E.P.; Oliveira, S.V. de; Medeiros, K.M. de; Araujo, E.M.; Fook, M.V.L. [Universidade Federal de Campina Grande (DEMa/UFCG), PB (Brazil). Dept. de Engenharia de Materiais], e-mail: elainepatriciaaraujo@yahoo.com.br

    2008-07-01

    The search for new sources of renewable energy order to minimize environmental impacts has led the scientists to develop new alternatives, such as the use of recycling of frying oils to produce biodiesel. The reuse of these oils has the advantage of obtaining a biofuel with the cost / benefit competitive. However, the conditions of post-consumer oils require treatment prior to its conversion the chemical (transesterification), removing solid particulate contaminants and adjusting its color using the clay of Paraiba. The use of biodiesel as fuel presents a reduction of levels of environmental pollution. This study aimed to characterize clay of Paraiba to be used in the clearing of frying oil. It was observed through the results of the Xray fluorescence (XRF) and infrared spectroscopy by Fourier Transform (FTIR), which the clays tested, have been effective in clearing of frying oils, making them similar to oil 'virgin'. (author)

  20. Cyclopentenyl acids from sapucainha (Carpotroche brasiliensis Endl, Flacourtiaceae): the first antileprotic used in Brazil; Acidos ciclopentenicos do oleo da sapucainha (Carpotroche brasiliensis Endl, Flacourtiaceae): o primeiro antileprotico usado no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Adriana S.; Lima, Joselia A.; Rezende, Claudia M.; Pinto, Angelo C. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Centro de Tecnologia. Inst. de Quimica]. E-mail: crezende@iq.ufrj.br

    2009-07-01

    The chaoolmugra oil is one of the oldest medicines used for leprosy until the development of sulfas. In Brazil, it is known as sapucainha oil that is obtained from Carpotroche brasilienesis seeds (Flacourtiaceae). Chemical and medicinal studies of sapucainha oil were introduced in Brazil by Peckolt, Cole and Cardoso which showed that major ciclopentenyl fatty acids as chaulmoogric, hydnocarpic and gorlic were responsible for its bactericidal activity. In this work, a method for quantification of sapucainha oil acidic fraction by HRGC was established using methyl n-heptadecanoate as internal standard. The oil chemical stability was investigated by the use of GC-MS, IR, {sup 1}H and {sup 13}C NMR and showed that the main degradation products belong to the cyclopentenyl moiety oxidation. (author)

  1. Fuzzy Diagnostic System for Oleo-Pneumatic Drive Mechanism of High-Voltage Circuit Breakers

    Directory of Open Access Journals (Sweden)

    Viorel Nicolau

    2013-01-01

    Full Text Available Many oil-based high-voltage circuit breakers are still in use in national power networks of developing countries, like those in Eastern Europe. Changing these breakers with new more reliable ones is not an easy task, due to their implementing costs. The acting device, called oleo-pneumatic mechanism (MOP, presents the highest fault rate from all components of circuit breaker. Therefore, online predictive diagnosis and early detection of the MOP fault tendencies are very important for their good functioning state. In this paper, fuzzy logic approach is used for the diagnosis of MOP-type drive mechanisms. Expert rules are generated to estimate the MOP functioning state, and a fuzzy system is proposed for predictive diagnosis. The fuzzy inputs give information about the number of starts and time of functioning per hour, in terms of short-term components, and their mean values. Several fuzzy systems were generated, using different sets of membership functions and rule bases, and their output performances are studied. Simulation results are presented based on an input data set, which contains hourly records of operating points for a time horizon of five years. The fuzzy systems work well, making an early detection of the MOP fault tendencies.

  2. Diseño de un recipiente para la recogida de aceites vegetales usados

    OpenAIRE

    Clavel Marqués, Rodrigo

    2004-01-01

    Frente a los problemas originados en el medio ambiente por el vertido incontrolado de aceites domésticos usados, que normalmente se van por el fregadero, proponemos a través de este proyecto el diseño de un nuevo recipiente diseñado para la recogida de estos aceites, además de un posible sistema de recogida. Como ya sabemos, en muchos casos en el mundo del diseño, el proceso tiene una fuerte carga emocional, ya que se pretende provocar una reacción en el usuario, la mayor parte de las vece...

  3. Bacilos gram negativos, contaminantes más prevalentes en lentes de contacto blandos usados

    OpenAIRE

    Castiblanco, Diana; Rodríguez, Martha Fabiola; Mayorga C., Myriam Teresa

    2007-01-01

    Las bacterias son los contaminantes más frecuentes de los lentes de contacto. Objetivo: identificar el tipo de depósitos microbiológicos en lentes de contacto blando (LCB) usados. Materiales y Métodos: 100 lentes de contacto blandos de usuarios o de prueba  de las ópticas, recolectándose 25 lentes para cada grupo de la FDA (Grupo1, 2, 3 y 4, según el contenido de agua e ionicidad del polímero). Los lentes se almacenaron por 20 días en sus estuches individuales hasta su estudio. A cada lente, ...

  4. Proyecto de sostenibilidad financiera de una concesionaria de vehículos usados

    OpenAIRE

    Arevalo Avecillas, Danny; Zurita Erazo, Sonia Analia

    2009-01-01

    El objetivo del presente trabajo busca demostrar que la alternativa de abrir las fronteras para la incursión del mercado de vehículos usados, constituye un nicho de mercado que está muy predispuesto a ser explotado, ya que actualmente los individuos de los estratos socioeconómicos medios –bajos y bajos no están en posibilidades de acceder a este tipo de bienes. Por otro lado los beneficios del bienestar que generaría en la sociedad el amplificar virtualmente sus posibilidades de satisfacc...

  5. Diseño de un equipo de pruebas rápidas para aceites usados

    Directory of Open Access Journals (Sweden)

    Juan Carlos Delgado Sanabria

    2016-01-01

    Full Text Available El presente trabajo tiene como objetivo presentar el proceso de diseño y la construcción de un equipo de pruebas rápidas para el análisis de aceites usados de motores. El equipo que permite evaluar el estado de degradación y contaminación de una muestra de aceite usado mediante los ensayos de crepitación, mancha de aceite, viscosidad y contenido de partículas consta de cuatro aparatos: placa de calentamiento, generador de manchas, viscosímetro de caída de bolas y detector de partículas ferrosas. El aporte fundamental del trabajo lo constituyen los dispositivos y métodos ideados tanto para medir con exactitud el tiempo de caída de la esfera del viscosímetro de bolas como para la detección de partículas ferromagnéticas. El equipo ha producido resultados satisfactorios comparados con los obtenidos en pruebas de laboratorio.

  6. Avaliação do custo de colírios lubrificantes a base exclusivamente de carboximetilcelulose no mercado brasileiro

    Directory of Open Access Journals (Sweden)

    Paulo Estacia

    2013-10-01

    Full Text Available OBJETIVO: Avaliar o custo do uso dos colírios lubrificantes mais utilizados no mercado nacional que apresentam na formulação o mesmo princípio ativo - carboximetilcelulose, considerando o número total de gotas presente em cada frasco dos colírios. MÉTODOS: Foi realizado um estudo experimental utilizando três frascos de cada um dos colírios Lacrifilm® (colírio 1 e Fresh Tears® (colírio 2. Para análise do custo dos colírios contou-se o número de gotas de cada frasco correlacionando os preços dos mesmos. O preço considerado para cada medicação foi o mínimo ao consumidor com alíquota de 17% publicado para o mês de janeiro de 2012. A análise estatística foi efetuada em SPSS® 18. A comparação das variáveis quantitativas analisadas foi procedida através do teste não paramétrico Mann-Whitney e correlação linear de Spearman, sendo considerada uma diferença estatisticamente significante um valor de probabilidade inferior a 0,05. RESULTADOS: Verificou-se que há diferença estatisticamente significativa entre as marcas de colírios avaliados com relação ao número total de gotas. O colírio 1 apresentou o maior número de gotas. CONCLUSÃO: O colírio 1, que tem o maior número de gotas por frasco, também é o que tem o preço mais acessível. Portanto, verifica-se que é o produto mais econômico, ou seja, o paciente pagará menos por cada gota.

  7. Um experimento simples usado na produção de placas de zonas de Fresnel

    OpenAIRE

    Muller,Márcia; Silva,Jean Carlos Cardozo da; Fabris,José Luís

    2005-01-01

    Neste trabalho propomos um experimento simples que tem por finalidade auxiliar no aprendizado dos fenômenos de interferência e difração da luz. Após uma análise pertinente da teoria de Fresnel da difração, os conhecimentos são aplicados na compreensão do funcionamento das placas de zonas de Fresnel. Apresentamos uma descrição detalhada dos processos usados para a fabricação e caracterização destas placas zonais, o que possibilita a produção de lentes difrativas com a distância focal desejada ...

  8. Creación de una empresa de recogida selectiva y gestión de aceite vegetal usado

    OpenAIRE

    Iribarren García, Iñigo

    2010-01-01

    Este proyecto trata sobre la creación de una empresa donde todo va a girar en torno a un producto principal: el aceite vegetal usado. A partir de ahí, en la empresa aparecen cuatro líneas de negocio independientes y a la vez relacionadas, que directa o indirectamente están ligadas con el aceite usado. Las cuatro líneas de trabajo van a ser una parte referente al servicio de recogida del aceite, actuación de la cual derivan otras dos de las cuatro líneas de negocio, como son la venta del aceit...

  9. Antileishmanial activity of Ferula assa-foetida oleo gum resin against Leishmania major: An in vitro study

    Directory of Open Access Journals (Sweden)

    Ali Fatahi Bafghi

    2014-01-01

    Full Text Available Background: In Ayurveda, asafetida is introduced as a valuable remedy for flatulence, hysteria, nervous disorders, whooping cough, pneumonia and bronchitis in children and also considered as an aphrodisiac agent. Presently, Leishmaniasis is common in most countries of the world and is a serious health problem in the world. Some plant medicines and natural products have a new candidate for treatment of leishmaniasis. Objective: This study was designed to evaluate Ferula assa-foetida oleo gum resin (asafetida on mortality and morbidity Leishmania major in vitro. Materials and Methods: Mostigotes were isolated from mice spleens and then transformed to promastigotes in Novy-Nicolle-Mac Neal (NNN medium supplemented with penicillin (100 U/ml, streptomycin (100 μg/ml and 20% heat-inactivated fetal calf serum (FCS at 25°C. A fixed initial density of the parasites was transferred to screw-capped vials containing 5 ml of RPMI 1640 media to which different concentrations of 2.5, 5, 10 and 20 μg asafetida were added and each concentration was done in triplicates. Each run also included control. The mortality of parasitoids was measured by the slide and the enzyme-linked immunosorbent assay (ELISA methods. Results: After 72 h, asafetida inhibited growth of parasites in all doses in stationary and logarithmic phases. The ELISA measurement suggested that the viability of parasites significantly decreased after 48h (P < 0.05. Conclusion: The results show that asafetida could prevent from growth and viability of parasites and this oleo gum resin can be useful for treatment of leishmaniasis.

  10. Biorremediación de lodos contaminados con aceites lubricantes usados

    Directory of Open Access Journals (Sweden)

    María Cristina Vásquez

    2010-01-01

    Full Text Available Los lodos contaminados con residuos de aceites lubricantes usados generan gran impacto ambiental negativo al no ser manejados adecuadamente. Se propuso la biorremediación para disminuir la concentración de dichos contaminantes. Los ensayos fueron realizados en las instalaciones de la planta de tratamiento de aguas residuales (PTAR de Río Frío (Girón, Santander, Colombia, donde se evaluaron consorcios microbianos nativos, que posteriormente se adicionaron a las biopilas conformadas por lodos deshidratados provenientes del tratamiento primario de aguas residuales domésticas (usados como fuente de materia orgánica, lodos provenientes de lavaderos de carros y lodos de alcantarillado de la zona industrial de la ciudad de Bucaramanga (Colombia. Se aislaron, identificaron y conservaron cepas microbianas con capacidad degradadora de hidrocarburos totales de petróleo (TPH como Pseudomonas spp., Acinetobacter spp, Enterobacter cloacae, Citrobacter spp., Bacillus brevis, Micrococcus spp y Nocardia spp. Se hizo una serie de pruebas piloto donde se inoculó cada montaje con un consorcio bacteriano a una concentración de 3x108 UFC/ml de bacterias y microorganismos fúngicos como Aspergillus spp., Fusarium spp., Trichoderma spp., a una concentración de 1x106 esporas/ml; se monitorearon parámetros de temperatura, pH, humedad y oxigenación. Se realizaron dos ensayos para verificar el comportamiento de dichos tratamientos; se analizó la variable continua TPH en ppm mediante el método de modelos mixtos lineares en bloques aleatorios completos, que revelaron diferencias significativas entre la biopila control y las biopilas bajo prueba; se obtuvieron porcentajes de remoción hasta de 94% de TPH en 120 días y 84% en 40 días, lo que reflejó un efecto positivo en la utilización de los consorcios de microorganismos bajo prueba en la descontaminación de lodos de alcantarillado industrial y lodos de lavaderos de carros.

  11. REDES DE INTERCAMBIO DE CALOR APLICADAS A LA ESTERIFICACIÓN DE ACEITES VEGETALES USADOS

    Directory of Open Access Journals (Sweden)

    María F. Laborde

    2014-01-01

    Full Text Available E n este trabajo se presenta la aplicación de redes de intercambio de calor (RIC a la esterificación de aceites vegetales usados (AVUs con catálisis ácida para la producción de biodiesel. Se aplican distintos métodos para obtener las cantidades mínimas de calor y la RIC para una capacidad de procesamiento de 0,19 kg/s de AVUs. Se considera una diferencia de temperatura mínima (∆Tmin de 10°C y los requerimientos mínimos de calentamiento y enfriamiento, resultan ser de 4629,87 W y de 10066,30 W, respectivamente. Al aplicar la red de intercambio calórico disminuye en un 78,92% el servicio de vapor requerido en el proceso y en un 62,48% el servicio de agua de enfriamiento, lo que demuestra que la integración reduce los requerimientos energéticos respecto al proceso no integrado.

  12. Efeito de lubrificantes sobre a integridade da sonda de Foley e implicações no tamponamento nasal para epistaxe Effect of lubricants on the integrity of the Foley catheter and their implications in nasal packing for epistaxis

    Directory of Open Access Journals (Sweden)

    Fernando P. Gaspar-Sobrinho

    2004-06-01

    Full Text Available O tamponamento nasal para epistaxe é comumente realizado com gaze lubrificada e sonda de Foley. O balonete de Foley, de látex, pode ser dissolvido pela vaselina ou parafina; entretanto, estes são excipientes de várias pomadas e cremes. OBJETIVO: Avaliar o efeito de potenciais lubrificantes sobre a integridade da sonda de Foley. FORMA DE ESTUDO: Experimental. MATERIAL E MÉTODO: Balonetes de 80 sondas foram eqüitativamente distribuídos e mantidos sob tração em contato com um dos seguintes produtos: duas pomadas, três cremes, um gel, vaselina e gaze seca, e inspecionados a cada 24 horas por cinco dias. Os lubrificantes foram testados quanto a hidrossolubilidade. RESULTADOS: Vinte balonetes romperam-se, dos grupos vaselina e uma pomada. Os produtos não associados à degeneração da sonda mostraram-se hidrossolúveis, a despeito da presença de petrolato. DISCUSSÃO: Conjectura-se que a gaze do tampão nasal anterior com lubrificante hidrofóbico contendo petrolato, justaposto ao balonete de Foley, pode lesá-lo. CONCLUSÕES: Considerando-se apenas a inocuidade à sonda de Foley, os cremes e a pomada Furacin® poderiam ser indicados para lubrificar a gaze do tampão nasal anterior associado ao balonete de Foley. Nossos resultados sugerem que cremes, pomadas e géis hidrossolúveis preservam a integridade da sonda de Foley, ainda que contenham derivados do petróleo.Nasal packing for epistaxis is usually carried out using lubricated gauze and a Foley catheter. Lubricants such as Vaseline or paraffin can dissolve the Foley balloon of latex; however, they are excipients of various ointments and creams. AIM: To evaluate the effect of potential lubricants on the Foley catheter. STUDY DESIGN: Experimental. MATERIAL AND METHOD: Balloons from eighty Foley catheters were distributed into groups of equal size and kept under traction in contact with one of eight different products: two ointments, three creams, one gel, Vaseline and dry gauze. The

  13. Limpeza da superfície de corte de rebolos por um sistema de ar comprimido na retificação cilíndrica externa de mergulho de materiais cerâmicos refrigerados com a técnica da mínima quantidade de lubrificante (MQL Grinding wheel surface cleaning using a compressed air system, in external plunge grinding of ceramics using the minimum quantity lubricant (MQL technique

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    E. C. Bianchi

    2012-06-01

    Full Text Available Nos processos de retificação, a utilização de fluidos de corte é uma maneira de implementar a qualidade final do processo, pois os fluidos têm como finalidade a lubrificação na área de contato entre a peça e ferramenta e a refrigeração das superfícies, assim evitando danificações na superfície da peça. Com isso, a utilização de fluidos de corte tem sido constantemente estudada, visando diminuir a utilização deste, pois a utilização de fluidos de corte tem seus problemas. O custo do produto final aumenta consideravelmente com o uso de fluidos de corte no processo de retificação, além de que os fluidos de corte são substâncias tóxicas e nocivas tanto às pessoas quanto ao meio ambiente. Portanto, indústrias, universidades e centros de pesquisas são levados a pesquisar métodos alternativos menos prejudiciais ao meio ambiente. Dentre as alternativas surge a técnica da mínima quantidade de lubrificante (MQL, que também tem suas desvantagens, como por exemplo, a formação de um borra de óleo na superfície de corte do rebolo, o que gera uma rugosidade maior na peça. Porém, visando minimizar o problema da formação da borra de óleo podem ser usados jatos de ar comprimido incidindo na superfície de corte do rebolo, com o objetivo de limpar a mesma. Este estudo será feito através da análise da avaliação das variáveis de saída do processo de retificação externa, como o comportamento da rugosidade superficial e dos desvios de circularidade. Através dos resultados obtidos pretende-se estudar a técnica do MQL, visando melhorá-la através da limpeza da superfície de corte do rebolo com jatos de ar comprimido.In grinding, the use of cutting fluids aims to improve the final quality of the process, because their purpose is to lubricate the contact area between workpiece and tool and the surface cooling, thus avoiding damages on the machined part. Therefore, this subject has been constantly studied, in order

  14. Effect of Ferula assa-foetida oleo-gum-resin on renal function in normal Wistar rats

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    S M Bagheri

    2016-01-01

    Full Text Available In traditional Iranian medicine, asafoetida, an oleo-gum-resin obtained from the roots of Ferula assa-foetida, has been prescribed as a diuretic. This study was undertaken to investigate the diuretic effect of asafoetida in normal rats. Asafoetida was administered orally at the doses of 25 and 50 mg/kg and furosemide (10 mg/kg, intraperitoneal was used as positive control. The diuretic effect was evaluated by measuring urine volume and sodium, potassium, urea, and creatinine content in urine and serum. Urine volume, excretion of sodium, and potassium were significantly increased by asafoetida as compared to the control group. A significant increase in creatinine clearance was observed in the groups treated with asafoetida at the doses of 25 and 50 mg/kg (P < 0.05. We conclude that asafoetida induced a diuretic effect comparable to that produced by the reference diuretic furosemide. This study provides a quantitative basis for explaining the folkloric use of asafoetida as a diuretic agent.

  15. Desenvolvimento de uma unidade virtual para desasfaltação de resíduos pesados de petróleo para maximização de óleo desasfaltado e daí óleo lubrificante

    OpenAIRE

    Ayda Karina León Ayala

    2011-01-01

    Resumo: O aumento mundial na demanda de energia e o descobrimento de óleo pesado e viscoso por parte da PETROBRAS nos últimos anos têm incrementado o desenvolvimento de novas tecnologias no Brasil para o processamento deste tipo de petróleo, assim como a adequação dos processos já existentes nas refinarias, visando atingir os requerimentos do mercado ao se obter produtos leves de alto valor comercial. No caso da produção de óleos lubrificantes tem se aumentado a necessidade de se conhecer o p...

  16. Conhecendo alguns termos técnicos em inglês usados no curso de Edificações

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    Cláudia Regina Ponciano Fernandes

    2017-08-01

    Full Text Available Este artigo apresenta uma visão geral sobre os resultados de uma pesquisa voltada para termos técnicos em inglês, utilizados no curso Técnico em Edificações. O objetivo principal deste trabalho é proporcionar aos discentes de Língua Inglesa uma definição simples e breve de termos técnicos em Inglês que são frequentemente usados no curso. Os dados foram obtidos por meio de anotações pessoais e de material impresso dos discentes. Os procedimentos utilizados foram: identificação dos termos técnicos, sua organização em ordem alfabética e escrita de seus significados correspondentes em uma lista de termos que foi digitada e salva no Microsoft Word. Os pressupostos teóricos estão ancorados em conceitos de Lexicografia e Terminografia segundo Welker (2004 e Bevilacqua e Finatto (2006 como também em Lexicologia e Terminologia na perspectiva de Krieger (2006, 2011. Como resultado, produziu-se um glossário com 422 termos que podem ser acessados por um link do programa 4shared. O glossário também apresenta termos relacionados aos programas AutoCAD e Sketchup. Ele pode ser usado como uma ferramenta para ampliar o vocabulário técnico do discente e preencher pequenas lacunas em termos de material específico em Inglês, especialmente para os discentes que acabam de ingressar no curso Técnico em Edificações dos Institutos Federais. Esta pesquisa mostra uma maneira significativa de promover a aprendizagem do Inglês no ensino Técnico Integrado ao Ensino Médio, para além das aulas tradicionais

  17. 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...

  18. Obtención de biodiesel con aceite de maíz usado en frituras y metacaolinita como catalizador Obtención de biodiesel con aceite de maíz usado en frituras y metacaolinita como catalizador

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    Jorge Medina-Valtierra

    2012-02-01

    Full Text Available Se investigó la producción de biodiesel usando un reactor intermitente, se utilizó la metacaolinita como un catalizador sólido ácido que presentó una alta actividad para la pro­ducción de biodiesel a partir de aceite de maíz usado en freidora. El área superficial de la metacaolinita, diámetro de poro y volumen de poro fueron 10 m2/g, 13.0 nm y 30 mm3/g, respectivamente. Las condiciones óptimas para la reacción de transesterificación fueron: una relación molar aceite/metanol 1:31, temperatura de 160 ºC, presión manométrica de 1.65 MPa y una cantidad de catalizador de 3 (% peso. El rendimiento de ésteres metílicos de ácidos grasos (biodiesel fue de 92.4 % para 2 h de reacción. Este método de preparación de biodiesel puede ser una buena alternativa para la utilización de aceite de maíz usado en freidora como una fuente muy barata para la producción de biodiesel combinado con un catalizador barato y además amigable con el medio ambiente.Biodiesel production with used frying corn oil by transesterification reaction, with methanol, using a commercial kaolinite thermally-activated solid acid catalyst was investigated. The surface area, the average pore diameter and volume of pore of metakaolinite were 10 m2/g, 13.0 nm and 30 mm3/g, respectively. The optimal conditions for the transesterification reaction were determinate to be oil/methanol, in a molar ratio 1:31, temperature 160 ºC, manometer pressure of 1.65 MPa and catalyst concentration of 3 % (w/w. The yield of fatty acid methyl esters (biodiesel was 92.4 % after 2 h of reaction. This method of preparation of biodiesel can be a positive alternative for utilizing used frying corn oil for feedstock of biodiesel combined with the cited inexpensive, “green” catalyst.

  19. OTIMIZAÇÃO DE CUSTOS DO TRANSPORTE PÚBLICO URBANO: COMPRAR OU VENDER UM ÔNIBUS USADO?

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    Ana Paula Rodrigues da Costa

    2014-08-01

    Full Text Available Embora a discussão sobre a mobilidade urbana envolva as modalidades de transporte de massa, a maioria das cidades ainda se valem das frotas de ônibus. Esta pesquisa objetiva apresentar um modelo que propõe identificar o momento que poderá ser exercida a opção de vender ou comprar um veículo usado da frota de ônibus do sistema de transporte público urbano, por meio da aplicação da Teoria de Opções Reais (TOR. Pesquisas apontam que quando o veículo é novo os custos de manutenção são baixos, cobrindo basicamente as revisões de rotina e a substituição de componentes, porém depois de certa idade, esses custos vão aumentando. Neste sentido uma dúvida que sempre surge é decidir o momento adequado para adquirir ou se desfazer de um veículo usado. A teoria utilizada neste estudo, a TOR, foca no Modelo Binomial em Tempo Discreto. Metodologicamente, o estudo foi desenvolvido com dados reais de um caso específico de frota de ônibus que serviu de suporte para a construção e teste do modelo proposto e apoiou-se em dados de uma empresa de ônibus tradicional do Espírito Santo. O modelo proposto é validado por meio de exemplo numérico que identifica o momento para a tomada de decisão. No caso em estudo o modelo apresentou o momento da opção a partir do final do segundo ano de uso do ônibus. A metodologia aplicada e os resultados encontrados despertam para a necessidade dos gestores terem informações decorrentes dos dados das frotas e poderem tomar decisões mais seguras, especialmente o momento “ideal” para substituição da frota. Para o poder público, estudos dessa natureza podem gerar subsídios à elaboração de normativos pelas agências reguladoras com vistas ao atendimento pelas concessionárias e de parcerias público-privado.

  20. ESTUDIO COMPARATIVO DE PASTAS DE CEMENTO ADICIONADAS CON CATALIZADOR DE CRAQUEO CATALÍTICO USADO (FCC, Y METACAOLIN (MK

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    Janneth Torres Agredo

    2012-01-01

    Full Text Available Este artículo es parte de un proyecto de investigación cuyo objetivo principal es evaluar el desempeño de un residuo de una refinería de petróleo, como adición al cemento Portland con el fin de establecer la viabilidad de su aplicación en materiales de construcción. Este residuo denominado catalizador usado a partir del proceso de craqueo catalítico (fcc procede de las unidades de ruptura catalítica en lecho fluido y está compuesto principalmente por sílice y alúmina. Se analizó la hidratación en pastas de cemento adicionadas con el fcc, y se hizo una comparación con la adición de metacaolín (mk. Para realizar el estudio, se prepararon pastas de cemento Portland Ordinario (opc, adicionadas en porcentajes del 10 y 20% de fcc y mk como reemplazo de cemento. La actividad puzolánica de las adiciones y el tipo de productos de hidratación se determinaron mediante las técnicas de difracción de rayos X (drx y del análisis termogravimétrico (tg/dtg. Como fases principales del proceso de hidratación en las pastas adicionadas con fcc se encontraron silicatos cálcicos hidratados (csh, aluminatos cálcicos hidratados (cah, y silico aluminatos cálcicos (cash, productos similares a los obtenidos en pastas adicionadas con metacaolín.

  1. Logística reversa dos pneus usados no Brasil Reverse logistics for post-consumer tires in Brazil

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    Carlos A. F. Lagarinhos

    2013-01-01

    Full Text Available Após a aprovação da Resolução CONAMA (Conselho Nacional do Meio Ambiente nº 258/99, ocorreu um avanço significativo na reciclagem de pneus no Brasil, com o desenvolvimento de tecnologias para reutilização, reciclagem e valorização energética. Em 2009, foi aprovada a Resolução CONAMA nº 416/09 que muda a forma de cálculo para a reciclagem, de pneus produzidos para venda no mercado de reposição. O objetivo principal deste trabalho é apresentar a logística reversa dos pneus usados no Brasil e comparar com os sistemas implementados no Japão, Estados Unidos e Comunidade Européia. No período de 1999 até 2010, foram destinados 2,44 milhões de toneladas, o equivalente a 487,6 milhões de pneus inservíveis de automóveis.After the CONAMA (National Council for Environment resolution 258/99, significant improvement occurred in the recycling of tires in Brazil, with technologies being developed for reusing, recycling and energy recovery. In 2009, the CONAMA 416/09 resolution changed the formula for calculating the recycling of tires, to be sold in the replacement market. The main objective in this work is to present the reverse logistics of used tires in Brazil and compare it with the systems already implemented in Japan, Europe and USA. From 1999 to 2010, were recycled 2.44 million tons, corresponding to 487.6 million automotive tires.

  2. Logística reversa dos pneus usados no Brasil Reverse logistics for post-consumer tires in Brazil

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    Carlos A. F. Lagarinhos

    2012-01-01

    Full Text Available Após a aprovação da Resolução CONAMA (Conselho Nacional do Meio Ambiente nº 258/99, ocorreu um avanço significativo na reciclagem de pneus no Brasil, com o desenvolvimento de tecnologias para reutilização, reciclagem e valorização energética. Em 2009, foi aprovada a Resolução CONAMA nº 416/09 que muda a forma de cálculo para a reciclagem, de pneus produzidos para venda no mercado de reposição. O objetivo principal deste trabalho é apresentar a logística reversa dos pneus usados no Brasil e comparar com os sistemas implementados no Japão, Estados Unidos e Comunidade Européia. No período de 1999 até 2010, foram destinados 2,44 milhões de toneladas, o equivalente a 487,6 milhões de pneus inservíveis de automóveis.After the CONAMA (National Council for Environment resolution 258/99, significant improvement occurred in the recycling of tires in Brazil, with technologies being developed for reusing, recycling and energy recovery. In 2009, the CONAMA 416/09 resolution changed the formula for calculating the recycling of tires, to be sold in the replacement market. The main objective in this work is to present the reverse logistics of used tires in Brazil and compare it with the systems already implemented in Japan, Europe and USA. From 1999 to 2010, were recycled 2.44 million tons, corresponding to 487.6 million automotive tires.

  3. DISTRIBUCIÓN, LOCALIZACIÓN E INHIBIDORES DE LAS POLIFENOL OXIDASAS EN FRUTOS Y VEGETALES USADOS COMO ALIMENTO

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    Jaime Morante Carriel

    2014-12-01

    Full Text Available Las polifenol oxidasas (PPOs son enzimas ubicuas que catalizan la reacción dependiente de oxígeno que transforma o-difenoles en o-quinonas. Estas quinonas son reactivas y capaces de modificar covalentemente un amplio abanico de especies nucleófilas, del interior de las células, que conduce a la formación de polímeros marrones, conocido como pardeamiento enzimático. El fenómeno de pardeamiento durante el crecimiento, recogida, almacenamiento y procesado de frutos y vegetales, es un problema de primera magnitud en la industria agroalimentaria y se reconoce como una de las principales causas de pérdidas de calidad y valor comercial. Produce cambios importantes tanto en la apariencia como en las propiedades organolépticas de frutos y vegetales comestibles, además suele ir asociado al desprendimiento de olores y efectos negativos sobre el valor nutricional. Aunque las PPOs se han descrito en diversos tejidos de plantas como raíces, semillas, hojas y frutos, el control de este fenómeno requiere un conocimiento bioquímico del tipo de sustratos fenólicos presentes en cada planta, el nivel de compuestos reductores, el nivel de accesibilidad del O2, de la naturaleza de los diferentes compuestos oxidables y de la polimerización y degradación de las o-quinonas. En este trabajo se presenta una revisión del efecto bioquímico, distribución, localización y posibles inhibidores de las PPOs en frutos y vegetales usados como alimento.

  4. POTENCIAL DEL ALMIDÓN RESISTENTE RETROGRADADO DE PAPA FRENTE A OTROS ADITIVOS FUNCIONALES USADOS EN POLLOS DE ENGORDE

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    D. Rodríguez-Aguilar

    2014-01-01

    Full Text Available El almidón resistente retrogradado (AR3 de las variedades de papa Pastusa (Solanum tuberosum grupo tuberosum y Guaneña (Solanum tuberosum grupo phureja fue evaluado como aditivo funcional con características similares a la fibra dietaria y por su potencial prebiótico en pollos de engorde. Se asignaron aleatoriamente 792 pollos machos Ross de un día de edad a uno de cinco tratamientos experimentales bajo un diseño completamente al azar. Se evaluaron niveles de suplementación de 1,0% de AR3 –Pastusa (AR3P y Guaneña (AR3G–, frente a manano-oligosacáridos (MOS, 0,5%, carboximetilcelulosa (CMC, 1%, levadura comercial (LEV, 0,5% y un control sin suplementar. Los datos se analizaron mediante el procedimiento GLM del programa SAS®. MOS y AR3P mostraron el mayor peso y ganancia de peso corporal al día 42 de edad (P<0,05, MOS presentó el menor consumo de alimento frente al tratamiento CMC (P<0,05, con una mejor conversión alimenticia comparado con CMC y el control sin suplementar (P<0,05. Los grupos AR3P y AR3G tuvieron un comportamiento intermedio para la conversión de alimento. El mayor porcentaje de eficiencia americana e índice de productividad fue para MOS, seguido de AR3P frente al control sin suplementar (P<0,05. Con referencia al ingreso neto parcial por pollo fraccionado, MOS mostró el mayor ingreso comparado con AR3G, observando para los demás tratamientos un comportamiento intermedio (P<0,05. Los resultados sugieren que el AR3P tiene potencial para ser usado como un aditivo funcional en dietas para pollos de engorde durante un ciclo comercial de producción.

  5. Microorganismos con capacidad degradativa de aceites lubricantes usados, aislados de estratos superficiales de suelos contaminados y optimización de condiciones de crcimiento. Ayacucho 2009

    OpenAIRE

    Palomino Felices, Sonia Haydeé

    2014-01-01

    La biorremediación, consiste principalmente en el uso de los organismos nativos (bacterias, hongos, plantas) para descomponer o degradar sustancias peligrosas convirtiéndolas en sustancias de caracteres menos tóxicos o inocuos para el ambiente y la salud humana. La investigación tuvo los siguientes objetivos: a) utilizar los microorganismos aislados de suelos contaminados con hidrocarburos para degradar "aceite lubricante usado" en suelos de experimentación en condiciones de laboratorio, b) e...

  6. CONSUMO COLABORATIVO: TENDÊNCIA DE CONSTRUÇÃO DE CONHECIMENTO E NEGÓCIOS NO MERCADO DIGITAL DE PRODUTOS USADOS

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    Cláudia Resem Paixão

    2015-12-01

    Full Text Available No contexto da economia criativa, o Consumo Colaborativo é crescente e impulsionado pela interação coletiva, especialmente, no ambiente virtual do mercado contemporâneo. Neste estudo, um website brasileiro de compra e venda de produtos usados ou de “segunda mão” https://www.enjoei.com.br é indicado como exemplo de ambiente colaborativo e promotor de conhecimento, comunicação e negócios de e-commerce. O problema de pesquisa decorreu da necessidade de identificação de tendências decorrentes das interações atuais entre mercado digital de produtos usados, o Consumo Colaborativo, conhecimento e responsabilidade socioambiental. O problema levantado por este conjunto de interações implica em questões de consumo e sustentabilidade ligadas à gestão de produtos e negócios, relacionando áreas como Tecnologia, Conhecimento, Design e Marketing. Portanto torna-se evidente que a comercialização de produtos usados e sua reutilização são partes de uma tendência de consumo colaborativo amplamente disseminada na world wide web (www. Os resultados apresentados são descrições, argumentos e considerações decorrentes do trabalho de pesquisa exploratório-descritiva sobre um fenômeno de consumo colaborativo, como tendência no mercado brasileiro.

  7. CONSUMO COLABORATIVO: TENDÊNCIA DE CONSTRUÇÃO DE CONHECIMENTO E NEGÓCIOS NO MERCADO DIGITAL DE PRODUTOS USADOS

    Directory of Open Access Journals (Sweden)

    Claudia Resem Paixão

    2015-12-01

    Full Text Available No contexto da economia criativa, o consumo colaborativo é crescente e impulsionado pela interação coletiva, especialmente, no ambiente virtual do mercado contemporâneo. Neste estudo, um website brasileiro de compra e venda de produtos usados ou de “segunda mão” (enjoei.com.br é indicado como exemplo de ambiente colaborativo e promotor de conhecimento, comunicação e negócios de e-commerce. O problema de pesquisa decorreu da necessidade de identificação de tendências decorrentes das interações atuais entre mercado digital de produtos usados, consumo colaborativo, conhecimento e responsabilidade socioambiental. Pois, isso implica em questões de consumo e sustentabilidade ligadas à gestão de produtos e de negócios, relacionando áreas como Tecnologia, Conhecimento, Design e Marketing. Pois, a comercialização de produtos usados e sua reutilização são partes de uma tendência de consumo colaborativo amplamente disseminada na rede Internet. Os resultados apresentados são descrições, argumentos e considerações decorrentes do trabalho de pesquisa exploratório-descritiva sobre um fenômeno de consumo colaborativo, como tendência no mercado brasileiro.

  8. Assessment of chemical composition of essential oil of Ferula assa-foetida oleo-gum-resin from two different sites of Yazd province in center of Iran

    Directory of Open Access Journals (Sweden)

    H. Hadavand Mirzaei

    2014-04-01

    Full Text Available In this experiment, the chemical composition of the essential oils obtained from Ferula assa-foetida oleo-gum resin collected from two different sites of Yazd province (Tabas and Yazd in the center of Iran, were identified. The gas chromatography mass-spectroscopy (GC/MS data showed that the qualitative composition of the components appeared to be constant in two different regions. Moreover, no remarkable variations were found in the amounts of the essential oil major constituents. A total thirty-nine components, comprising 91.52% and 95.61% of the total oil, were characterized in Tabas and Yazd samples, respectively. The hydrodistilled oils contained E-1-propenyl sec-butyl disulfide (40.15 and 44.36% in Tabas and Yazd samples, respectively, Z-1-propenyl sec-butyl disulfide (23.93 and 27.98%, Guaiol (5.50 and 3.14% and Carotol (5.14 and 1.63% as major constituents.

  9. Chemical composition, antioxidant and antimicrobial activities of essential oil obtained from Ferula assa-foetida oleo-gum-resin: effect of collection time.

    Science.gov (United States)

    Kavoosi, Gholamreza; Rowshan, Vahid

    2013-06-15

    The properties of essential oils obtained from Ferula assa-foetida oleo-gum-resins (OGRs) collectioned in three collections times in 15 June (OGR1), 30 June (OGR2) and 15 July (OGR3) 2011 was investigated. Essential oil from OGR1 was constituted high levels of (E)-1-propenyl sec-butyl disulfide (23.9%) and 10-epi-γ-eudesmol (15.1%). Essential oil from OGR2 was constituted high levels of (Z)-1-propenyl sec-butyl disulfide (27.7%) and (E)-1-propenyl sec-butyl disulfide (20.3%). Essential oil from OGR3 was constituted high levels of β-pinene (47.1%) and α-pinene (21.3%). Inhibitory concentration (IC50) for radical scavenging were 0.012-0.035, 0.025-0.047 and 0.035-0.066 mg/ml of essential oil obtained from OGR1, OGR2 and OGR3, respectively. Minimal inhibitory concentration (MIC) for Gram-positive and Gram-negative bacteria and fungi grpwth were 0.028-0.111, 0.027-0.107 and 0.018-0.058 mg/ml of essential oil obtained from OGR1, OGR2 and OGR3, respectively. Essential oils obtained from different OGRs have different composition and biological activity thus have different applications in food and health industry. Crown Copyright © 2012. Published by Elsevier Ltd. All rights reserved.

  10. Composition and antibacterial activity of the essential oils of four commercial grades of Omani luban, the oleo-gum resin of Boswellia sacra FLUECK.

    Science.gov (United States)

    Al-Saidi, Salim; Rameshkumar, K B; Hisham, Abdulkhader; Sivakumar, Nallusamy; Al-Kindy, Salma

    2012-03-01

    The essential oil compositions of four botanically certified and commercially available samples of Omani lubans (oleo-gum resins of Boswellia sacra Flueck.), locally known as Hoojri, Najdi, Shathari, and Shaabi in Jibali Arabic, obtained from plants growing in four different geographic locations of the Dhofar region of Oman, were analyzed by GC-FID, GC/MS, and (13) C-NMR spectroscopy. The market price of these four grades of lubans differed considerably, according to their color, clump size, and texture. However, this study revealed that Hoojri, the first grade luban, and Shaabi, the fourth grade luban, which greatly differed in their price, closely resembled each other in their essential oil composition, yield, and physicochemical characteristics, except the color and texture. The composition, yield, and specific rotation of the oils of Najdi and Shathari, the second and the third grade lubans, respectively, were different from those of Hoojri and Shaabi, but they both had high limonene contents. Najdi oil was different from the other three oils in terms of its high myrcene content. α-Pinene was the principal component in all the oils and can be considered as a chemotaxonomical marker that confirms the botanical and geographical source of the resins. All the oils showed pronounced activity against a panel of bacteria, and the trend in their bioactivity and their mode of action are discussed. Copyright © 2012 Verlag Helvetica Chimica Acta AG, Zürich.

  11. CONSUMO COLABORATIVO: TENDÊNCIA DE CONSTRUÇÃO DE CONHECIMENTO E NEGÓCIOS NO MERCADO DIGITAL DE PRODUTOS USADOS

    OpenAIRE

    Cláudia Resem Paixão; Richard Perassi Luiz de Souza

    2015-01-01

    No contexto da economia criativa, o Consumo Colaborativo é crescente e impulsionado pela interação coletiva, especialmente, no ambiente virtual do mercado contemporâneo. Neste estudo, um website brasileiro de compra e venda de produtos usados ou de “segunda mão” https://www.enjoei.com.br é indicado como exemplo de ambiente colaborativo e promotor de conhecimento, comunicação e negócios de e-commerce. O problema de pesquisa decorreu da necessidade de identificação de tendências decorrentes das...

  12. Optimización del acero usado como soporte y gancho de sujeción del acero de refuerzo en cimentaciones de concreto

    OpenAIRE

    Sánchez Trujillo, Bryan; Sánchez Trujillo, Bryan; Sánchez Trujillo, Bryan

    2015-01-01

    Para el proceso constructivo de cimentaciones de concreto se usan diversos accesorios, algunos estandarizados y otros no; uno de los no estandarizados es el acero usado como soporte y gancho de sujeción de las barras de refuerzo, (comúnmente llamado "burro", "burrito" o "silletas" de soporte), pues en los planos estructurales no se detalla la forma de colocar y sostener las barras de refuerzo y en obra las silletas se colocan de forma empírica según las experiencias previas de los encargados ...

  13. Proyecto de mejora de la durabilidad de los pavimentos usados en aeropuertos empleando materiales alternativos y geo-sintéticos

    OpenAIRE

    Cabezuelo Moreno, Juan José

    2015-01-01

    Contribuir a la mejora de la durabilidad de los pavimentos usados en las pistas de aeropuertos, en particular pavimentos de tipo flexible, empleando combinaciones de capas de diferentes materiales y geo-sintéticos. En particular, plantear el uso de materiales novedosos como alternativa a las típicas capas de pavimento a base de hormigón y mejora de la durabilidad de las mismas empleando combinaciones de sendos materiales y geo-sintéticos. El mundo de la aviación y en concreto el del diseño...

  14. The Relaxant Effect of Seed's Essential Oil and Oleo-Gum-Resin of Ferula Assa-Foetida on Isolated Rat's Ileum.

    Science.gov (United States)

    Bagheri, Sm; Hejazian, Sh; Dashti-R, Mh

    2014-03-01

    In Iranian folk medicine, several plants are used for treatment of gastrointestinal disorders, such as diarrhea and spasm. One of these herbal medications are the essential oil yielded from seeds of Ferula assa-foetida L. and an oleo-gum-resin known as asafetida, which is exudated from its root. F. assa-foetida grows wildly in south and central mountains of Iran. In this study, relaxant effect of asafoetida and seed's essential oil of F. assa-foetida was investigated in isolated rat's ileum in three doses. A total of 5 cm of ileum was removed and sets for recording its isotonic contractions. The amplitude of contractions induced by different doses of asafoetida and essential oil before and after exposing the specimens with cumulative logarithmic concentrations of acetylcholine (Ach) was evaluated. The relaxant effect of asafoetida and seed's essential oil of F. assa-foetida was investigated in isolated rat's ileum in three doses (0.1 0.2 and 0.3%). All statistical analysis was by GraphPad Prism 5 (San Diego, California) and comparisons were made by means of the analysis of variances followed by Tukey's test. The statistical significance was considered as P essential oil has significant antispasmodic action against cumulative concentrations of 10(-12) up to 10(-2) M Ach. In spasmolytic evaluation, our findings showed that the essential oil derived from F. assa-foetida seed in concentrations of 0.2% and 0.3% significantly reduced Ach (10(-4) M) induced contractions. Exposure to the 0.2% and 0.3% asafoetida, reduced the percentage of maximum contraction induced by 10(-4) M Ach to 43% and 12% respectively, which this reduction was statistically significant. The results of the present study, supports the traditional claim of asafoetida as an antispasmodic therapeutic.

  15. Sensibilidade de fungos entomopatogênicos a agroquímicos usados no manejo da cana-de-açúcar

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    Aline Aparecida Alves Botelho

    2011-01-01

    Full Text Available Os agroquímicos empregados no manejo da cana-de-açúcar podem afetar a ação de fungos entomopatogênicos usados no controle biológico de pragas da cultura. Este trabalho teve por objetivo investigar se os inseticidas, herbicidas e maturadores utilizados no manejo da cana-de-açúcar têm efeito tóxico sobre os fungos Beauveria bassiana e Metarhizium anisopliae. Foram utilizados os inseticidas thiametoxan, aldicarbe e fipronil, os herbicidas imazapir, diuron, metribuzin, hexazinone+diuron, clomazone+ametrina, 2,4 diclorofenoxiacético e glifosato, e os maturadores etil-trinexapac, sulfometurom-metílico e glifosato também. Os fungos foram cultivados em meio de cultura batata-dextrose-ágar contendo os agroquímicos. Avaliou-se o crescimento micelial, a produção e viabilidade dos conídios, e fez-se a avaliação da toxicidade dos agroquímicos. O inseticida à base de thiametoxan foi considerado compatível, pois não afetou o crescimento micelial, a produção e a viabilidade dos conídios dos dois fungos. O inseticida formulado com fipronil se mostrou parcialmente tóxico para os fungos, sendo considerado moderadamente compatível, enquanto o aldicarbe foi considerado tóxico. Os herbicidas avaliados afetaram o crescimento micelial, a produção e a viabilidade dos conídios dos entomopatógenos e foram classificados como tóxicos, mas aqueles formulados com imazapir, glifosato e metribuzim foram considerados compatíveis. Entre os agroquímicos usados como maturadores apenas o glifosato foi classificado como compatível. Os agroquímicos usados no manejo da cana-de-açúcar, e que foram testados neste estudo, têm majoritariamente efeito tóxico sobre B. bassiana e M. anisopliae podendo comprometer sua ação como bioagentes de controle de pragas da cultura.

  16. Introducción de los marcadores del discurso en los manuales del ELE del nivel B2 usados en Brasil

    Directory of Open Access Journals (Sweden)

    Nogueira da Silva, Antonio Messias

    2010-02-01

    Full Text Available Este estudio pretende comprobar, en términos generales, si los manuales del ELE del nivel B2, que actualmente son usados en Brasil, introducen adecuadamente la clase de los marcadores del discurso en sus unidades didácticas. Esta investigación no sólo ha pretendido deslindar qué grupos de marcadores son introducidos en estos manuales sino también ofrecer a los profesores, aprendices y autores pautas más precisas que aporten a modos de mejorar y profundizar la enseñanza de estas unidades discursivas tanto en el aula de ELE como en la elaboración de materiales didácticos en los que se deberá tener en cuenta sus valores semántico-pragmáticos.

  17. VARIACION DE PARAMETROS DE CRIPTOGRAFIA CON CURVAS ELIPTICAS USADOS EN LA FIRMA DIGITAL DE DATOS SOBRE UNA RED DE SENSORES INALAMBRICOS

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    Javier Omar Contreras Rodriguez

    2016-09-01

    Full Text Available En la actualidad, el auge de las aplicaciones de las redes de sensores inalámbricos (WSN = Wireless Sensors Networks está generando una gran cantidad de información de carácter sensible que requiere un manejo confiable mediante la implementación de sistemas de seguridad de los datos compatibles con la naturaleza de estas redes. En ese sentido, cada vez más aumenta el interés por el uso de algoritmos de criptografía de clave pública con curvas elípticas (ECC = Elliptic Curve Cryptography como una alternativa de menor consumo de recursos computacionales comparado con los algoritmos tradicionalmente usados, como por ejemplo, RSA (Rivest-Shamir-Adleman, Diffie-Hellman, otros. En este artículo, se revisa la construcción de un prototipo de sistema de seguridad usando ECC para la firma digital de datos (ECDSA = Elliptic Curve Digital Signature Algorithm usando un control lógico basado en redes definidas por software (SDN = Software Defined Networking para el control de funcionalidades básicas y que permita ajustar en tiempo real los parámetros del algoritmo ECDSA según el tipo de aplicación de la WSN.

  18. Revisión de índices de distribución espacial usados en inventarios forestales y su aplicación en bosques tropicales

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    Alicia Ledo

    2012-10-01

    Full Text Available En este trabajo se hace una revisión de los diferentes índices utilizados para describir y caracterizar la estructura horizontal o patrón espacial en masas forestales con especial énfasis en aquellos que se han aplicado para el estudio de bosques tropicales. Estos índices se han clasificado en función del tipo de datos requerido para su cálculo. Diferentes aspectos del comportamiento estadístico y la aplicabilidad de aquellos índices más usados (los índices de Fisher y Morisita, el análisis de la varianza en escalas anidadas y la técnica SADIE de entre las técnicas que utilizan datos de densidades o coberturas en unidades de muestreo; los índices de Clark-Evans, Pielou y Byth-Ripley basados en medidas de distancias entre árboles; y las funciones L(d y Oring que requieren para su cálculo la posición de todos los arboles se analizan en un caso de estudio a partir de datos de parcelas experimentales un bosque tropical andino.

  19. Tecnología, territorio y sociedad. Producción de biodiesel a partir de aceites usados en la provincia de Buenos Aires

    Directory of Open Access Journals (Sweden)

    Santiago Manuel Garrido

    2010-05-01

    Full Text Available Desde el año 2002, se desarrollaron en Argentina distintas experiencias vinculadas a la producción de biodiésel a partir de aceites vegetales usados. El desarrollo de estas experiencias puede ser interpretada como una trayectoria socio-técnica en la que se articularon diferentes grupos sociales, técnicas y condiciones socio-demográficas generando distintos estilos socio-técnicos. La reconstrucción de esta trayectoria permite entender cómo se desarrollan los procesos de co-construcción de tecnologías, regulaciones, dinámicas económicas y prácticas sociales; más, cuando en el caso analizado, el aprovechamiento de desechos puede resolver problemas tanto ambientales como económicos y socialesSince 2002, a number of experiences have developed in Argentina related to biodiesel production based on waste vegetable oils. The development of these experiences can be interpreted as a socio-technical trajectory in which different social and technical, and different socio-demographic conditions were articulated, generating distinct socio-technical styles. The reconstruction of this trajectory makes possible an understanding of how processes of co-construction of technologies, regulations, economic dynamics and social practices develop. In the case analyzed, this reconstruction will permit observation of how the use of waste material can resolve environmental as well as economic and social problems.

  20. Avaliação de instrumentos de medida usados em pacientes com fibromialgia Assessment of different instruments used as outcome measures in patients with fibromyalgia

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    Adriana Martins Barros Alves

    2012-08-01

    Full Text Available OBJETIVO: Avaliar os diferentes instrumentos de medida usados em pacientes com fibromialgia. PACIENTES E MÉTODOS: Foram avaliados 60 indivíduos que participaram de um ensaio clínico de corte transversal comparando os efeitos de exercícios realizados na água e exercícios realizados em solo, por meio dos questionários Fibromyalgia Impact Questionnaire (FIQ para avaliar o impacto da doença, The Medical Outcomes Study 36 item Short-Form Health Survey (SF-36 para avaliação da qualidade de vida, Inventário Beck para avaliar o estado de depressão e escala visual analógica da dor (EVA. Esses questionários foram comparados aos resultados obtidos em uma escala transicional do tipo Likert, a Escala verbal de avaliação de mudança (EVAM, considerada como critério de mudança na avaliação dos outros instrumentos. RESULTADOS: O coeficiente de Spearman foi usado para estudar a correlação entre a medida EVAM e os outros instrumentos em dois momentos (T1 e T2. Em T1 houve correlação moderada entre EVAM e EVA (r = 0,49, EVAM e FIQ (r = 0,41 e correlação negativa entre EVAM e os domínios referentes a dor (r = -0,49, estado geral (r = -0,55 e componente físico (r = -0,42 do SF-36. Em T2, apenas o domínio vitalidade do SF-36 mostrou correlação negativa com EVAM, de valor fraco (r = -0,27. CONCLUSÃO: Considerando-se a EVAM como padrão ouro, nenhum dos instrumentos avaliados conseguiu captar, de maneira ótima, mudança no estado de saúde do paciente com fibromialgia.OBJECTIVE: To assess the different measure instruments used for patients with fibromyalgia. PATIENTS AND METHODS: This study assessed 60 individuals participating in a clinical trial of cross-sectional cohort comparing the effects of exercises performed in water and on land. The following instruments were used: the Fibromyalgia Impact Questionnaire (FIQ to assess the impact of the disease; the Medical Outcomes Study 36-item Short-Form Health Survey (SF-36 to assess quality

  1. EFEITOS DOS PRAZOS DE COMPRA, ESTOCAGEM E RECEBIMENTO NO RESULTADO DA VENDA: PROPOSTA PARA MENSURAÇÃO EM REVENDA DE AUTOMÓVEIS USADOS

    Directory of Open Access Journals (Sweden)

    Rodney Wernke

    2016-06-01

    Full Text Available O artigo tem o objetivo de evidenciar o impacto dos prazos do ciclo operacional no resultado da venda. Nesse sentido, o estudo pretende responder como mensurar os efeitos desses prazos na lucratividade dos veículos comercializados por revenda de automóveis usados. Foi utilizada metodologia do tipo descritiva, no formato de estudo de caso, com abordagem qualitativa. Após breve introdução foi efetuada uma revisão da literatura a respeito dos conceitos relacionados ao tema central. Em seguida, foram apresentadas as principais características do estudo de caso realizado, com a descrição da empresa estudada e das etapas seguidas para dimensionar a influência dos prazos de compra, estocagem e recebimento no resultado auferido pela entidade. Posteriormente, foram apresentados os relatórios gerenciais elaborados com a intenção de demonstrar a diferença entre o resultado da venda “com” e “sem” a consideração desses prazos e comentados os principais aspectos pertinentes. Concluiu-se que, com os 32 carros vendidos durante o período da pesquisa, haveria redução de R$ 26.143,72 (R$ 94.021,67 – R$ 67.877,95 comparando-se as duas formas de mensurar o resultado comercial (margem de contribuição “sem” e “com” os efeitos dos prazos associados ao ciclo operacional, que representou queda de 27,81% no resultado final do período. Ainda, foram identificadas algumas limitações associáveis ao procedimento de cálculo utilizado.

  2. Diseño de interfaces en los medios visitados por los venezolanos ¿Los más usados son usables?

    Directory of Open Access Journals (Sweden)

    Gladys Benigni

    2015-12-01

    Full Text Available Las Tecnologías de Información y Comunicación (TIC han impactado favorablemente a los ciudadanos y han cambiado sus hábitos de consumo de bienes y servicios; desde las distintas facetas de la vida en sociedad es necesario acoplarse a estos nuevos hábitos. La prensa nacional e internacional no escapa a esta realidad, y por tal, han comenzado a abrirse espacios en Internet para acercarse más a los ciudadanos a través del apoderamiento de las TIC. En Venezuela se ha venido incrementando el uso de los sitios web de los medios de comunicación social; a los cuales se accede desde computadores personales, portátiles, tabletas y teléfonos inteligentes. No obstante, muchos espacios en Internet se diseñan sin apego a las normas y principios de usabilidad que facilitan la intuitiva y correcta interacción del usuario con la aplicación informática. En consecuencia, se evalúa si los sitios web de los medios de comunicación social más usados por los internautas venezolanos son usables; para lo cual, se los analizará empleando los Principios de usabilidad, de Nielsen, y la Guía para evaluación experta, de Márquez Correa. Se concluye que los sitios web evaluados cumplen medianamente los principios, partes y recomendaciones expertas en cuanto al diseño de interfaces web.

  3. Aframomum stipulatum (Gagnep) K. Schum and Aframomum giganteum (Oliv. & Hanb) K. Schum as Aroma Tincto Oleo Crops resources: essential oil, fatty acids, sterols, tocopherols, and tocotrienols composition of different fruit parts of Congo varieties.

    Science.gov (United States)

    Ngakegni-Limbili, Adolphe Christian; Zebib, Bachar; Cerny, Muriel; Tsiba, Gouolally; Elouma Ndinga, Arnold Murphy; Mouloungui, Zéphirin; Fourastier, Isabelle; Ouamba, Jean-Maurille

    2013-01-15

    Today, few known plant species provide both an essential oil (EO) and a vegetable oil (VO). Seed and husk of two Aframomum species were investigated and compared in terms of EO, fatty acids, tocopherols, and tocotrienols. EO yield reaches 15.3 g kg(-1) in the seeds and 3.2 g kg(-1) in the husks, while VO yield is 180.0 g kg(-1) in the seeds and 25.0 g kg(-1) in the husks. β-Pinene, 1,8-cineol, α-selinene, terpine-4-ol, linalool, myrtenal and β-caryophyllene are the major compounds of seed and husk EO. Fatty acid analysis of two Aframomum species shows that oleic, linoleic, and palmitic acids were the major compounds of VO. Total sterol contents reached 4.3 g kg(-1) in seed VO and 8.5 g kg(-1) in husk VO. An appreciable amount of tocopherols (0.52 g kg(-1) ) was found in seed VO. The seed and husk oil of A. stipulatum and A. giganteum fruits are rich sources of many bioactive constituents such as fatty acids, sterols, tocopherols and tocotrienols. These tropical wild fruits can be considered as new Aroma Tincto Oleo Crops (ATOC) resources that contain both EOs and VOs. Copyright © 2012 Society of Chemical Industry.

  4. Utilización de neumáticos usados como agregado en el hormigón: caso provincia de Santa Elena, Ecuador

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    Armando Saltos

    2017-06-01

    Full Text Available El proyecto encontró un diseño de hormigón con partículas provenientes de neumáticos usados, que después de un proceso de selección, trituración controlada, una dosificación acorde con los parámetros de las normas internacionales de diseño de hormigón del Instituto Americano del Concreto (ACI, la Norma Ecuatoriana de Construcción (NEC, la incorporación de hasta 10 % de caucho triturado como sustituto parcial de agregados gruesos en el diseño de hormigón, se obtienen resultados favorables y de buena resistencia lo que hace que  se pueda utilizar cumpliendo todas las normas ecuatorianas de la construcción. También se realizó un ensayo con un 10% de caucho triturado incorporado como sustituto parcial del agregado fino, resultando ser aún más apropiado para fines constructivos y de elaboración de hormigón. En el presente trabajo de investigación se realiza los ensayos como mezclas separadas. Se efectuaron pruebas de vigas con incorporación de agregados gruesos de hasta 15% cumpliendo las normas, pero no se ejecutó una serie completa. Palabras clave: neumático, agregado, hormigón, resistencia. Abstract The project found a concrete design with particles from used tires, which after a selection process, controlled grinding, a dosage in accordance with the parameters of the American Concrete Institute (ICA international standards of concrete design, Standard (NEC, the incorporation of up to 10% of tired rubber as a partial substitute of coarse aggregates in the concrete design, gives favorable results and good resistance which makes it possible to use all the Ecuadorian standards of the building. A test with 10% of crushed rubber incorporated as a partial substitute of the fine aggregate was also performed, making it even more suitable for construction and concrete processing purposes. In the present research work the tests are performed as separate mixtures. Beams were tested with incorporation of coarse aggregates of up to

  5. Generic drugs in Brazil: known by many, used by few Medicamentos genéricos no Brasil: conhecidos por muitos, usados por poucos

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    Andréa D. Bertoldi

    2005-12-01

    Full Text Available This study evaluated knowledge and use of generic drugs in a population-based sample of adults from a southern Brazilian city. The outcomes were: the proportion of generics in total medicines used; theoretical and practical knowledge about generics; and strategies used to buy medicines on medical prescriptions. The recall period for drug utilization was 15 days. The proportion of generics in total medicines was 3.9%. While 86.0% knew that generics cost less and 70.0% that the quality is similar to brand name medicines, only 57.0% knew any packaging characteristics that distinguish generics from other medicines. The highest proportion of generic drug utilization was in the antimicrobial pharmacological group. A brand name medicine (with a brand similar to the generic name was mistakenly classified as a generic through photos by 48.0% of the interviewees. Among subjects who bought medicines in the 15-day period, 18.9% reported buying a generic, but this result should be interpreted with caution, because the population frequently fails to differentiate between generics and other medicines.Este estudo avaliou o conhecimento e utilização de medicamentos genéricos em uma amostra populacional de adultos de uma cidade no sul do Brasil. Os desfechos foram: proporção de genéricos sobre o total de medicamentos usados; conhecimento teórico e prático sobre medicamentos genéricos; estratégias usadas para compra de medicamentos com prescrição médica. O período recordatório para uso de medicamentos foi de 15 dias. A proporção de genéricos no total de medicamentos foi de 3,9%. Enquanto 86,0% sabiam que o preço dos genéricos era menor e 70,0% que a qualidade era equivalente aos medicamentos de marca, apenas 57,0% conheciam alguma característica da embalagem que diferencia os genéricos de outros medicamentos. A maior proporção de uso de genéricos foi encontrada no grupo farmacológico dos antimicrobianos. Um medicamento de marca (com nome

  6. Propuesta de mejora para el mantenimiento del equipo pesado de la constructora COANDES S.A. basado en un análisis del aceite lubricante usado en los motores de combustión interna diésel

    OpenAIRE

    Arévalo Avalos, David Alejandro

    2015-01-01

    Se realiza una propuesta de mejora proactiva-predictiva para el mantenimiento efectuado por COANDES. Primero se efectúa una evaluación de criticidad de los equipos y un estudio del aceite usado en los motores de combustión interna diésel. Finalmente se propone un modelo de análisis de fallas basado en los resultados que incluye un software de interpretación de resultados de análisis de aceite. The investigation performs a proposal for proactive-predictive improvement for the maintenance by...

  7. Análisis de viabilidad técnica y económica de implantación de un sistema de obtención de biocombustible a partir de aceite usado

    OpenAIRE

    Montesinos López, Rubén

    2012-01-01

    Este proyecto se centrará en el aprovechamiento del aceite vegetal usado como fuente de biomasa para la producción de biodiesel, un tipo de biocombustible, como alternativa a la utilización de aceites procedentes de cultivos energéticos. Se tratará de hacer una revisión del estado del arte en el ámbito de la biomasa y más concretamente en el ámbito del biodiesel. Se estudiará la tecnología relacionada con la producción de biodiesel, así como la decisión de elegir el aceite vege...

  8. Logística reversa e o desenvolvimento sustentável: os benefícios ambientais, sociais e econômicos gerados pela reciclagem de óleo de fritura usado

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Frantz dos Santos

    2012-05-01

    Full Text Available Esta pesquisa teve por objetivo analisar os principais benefícios ambientais, sociais e econômicos decorrentes das práticas de reciclagem do óleo de fritura usado no processo de fabricação de sabão. Ancorado nos aportes teóricos de logística reversa e desenvolvimento sustentável, foi realizado um estudo de caso no Movimento Solidário Colmeia, uma organização de caráter social, cujo objetivo é o de promover o resgate da cidadania e a melhoria da qualidade de vida de famílias carentes no município de Rio Grande (RS. Os dados foram coletados por meio de seis entrevistas semiestruturadas com fundadores, voluntários e participantes do movimento. Os resultados demonstram que a estrutura logística reversa elaborada pelo movimento é fundamental para a viabilidade da reciclagem do sabão, pois é essa estrutura que permite a coleta do óleo e o envio para a oficina do sabão. Identificou-se que a oficina contribui para a geração de diversos benefícios ambientais e sócio-econômicos, uma vez que o óleo de fritura usado, que seria descartado na coleta de resíduo orgânico, é transformado em matéria-prima para a produção de sabão. Além disso, parte da renda da comercialização do sabão auxilia financeiramente as participantes da oficina do sabão e ainda permite que o movimento realize atividades sociais que contribuem para o desenvolvimento cultural das participantes.

  9. EXTRACCIÓN Y SECADO DE FLOCULANTES NATURALES USADOS EN LA CLARIFICACIÓN DE JUGOS DE CAÑA EXTRAÇÁO E SECAGEM DE NATURAL USADO FLOCULANTES DE CLARIFICAÇÁO DO SUCOS DE CANA EXTRACTION AND DRYING OF NATURAL FLOCCULANTS USED IN CANE JUICE CLARIFICATION

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Ortiz G

    2011-12-01

    Full Text Available La clarificación en jugos de caña se realiza por la adición de mucílagos vegetales. El objetivo fue evaluar la clarificación de tres floculantes naturales (balso, cadillo y guácimo en jugos de caña. Se caracterizó fisicoquímicamente y se evaluó la retención de sólidos insolubles versus un floculante sintético. Fue usado un modelo estadístico de bloques completamente al azar y la muestra control fue el Profloc 985. Se obtuvo un mucílago de mayor calidad al desfibrar en agua destilada, secar a 38°C por 11 horas y reducir a un tamaño de partícula de 212µm. La clarificación ideal fue a una concentración 0,03% p/v. El cadillo fue el floculante seco que presentó mayor eficiencia en la precipitación de sólidos solubles con un 93,6%, seguido del balso con un 90,4% y el guácimo con un 89,7%, frente al 100% de la muestra control. Los tres floculantes modificados están compuestos principalmente de carbohidratos (fructosa, glucosa y maltosa, saponinas y fenoles, además de hierro, calcio y fosfatos. Al comparar los contenidos de calcio y los fosfatos se encontró que los mayores valores correspondían a los floculantes modificados cadillo y balso, estos valores influyeron en su mejor desempeño en el proceso de clarificación del jugo de caña.A clarificaçáo do caldo da cana é realizada pormeio da adiçáo de mucilagem de plantas. O objetivo foi avallar o esclarecimento de três floculantes naturais (balsa, bardana e saman no caldos da cana. Foi caracterizado physicochemically e avallado retençáo insolúveis versus um floculante sintético. Foi utilizado um modelo estatístico para blocos ao acaso e amostra de cotrolo foi o Profloc 985. Mucilagem maior qualidade foi obtido pela despolpa a água destilada, secas a 38°C durante 11 horas e reduzido a un tamaño de partícula de 212µm. 0 esclarecimento foi ideal em urna concentraçáo de 0,03% w/v. A bardana foi floculante seca apresentou maior eficiencia na precipitaçáo de s

  10. Estudio de la hidratación de pastas de cemento adicionadas con catalizador de craqueo catalítico usado (FCC de una refinería colombiana

    Directory of Open Access Journals (Sweden)

    Jenny Johanna Trochez

    2010-01-01

    Full Text Available En este artículo se analiza el efecto de la incorporación de un residuo industrial de una refinería de petróleo colombiana, conocido como catalizador de craqueo catalítico usado (FCC, en el proceso de hidratación de pastas cementicias. Para tal efecto, se prepararon pastas de cemento Pórtland ordinario (OPC adicionadas en porcentajes del 10 y 20% de FCC como reemplazo de la cantidad de cemento. La reactividad puzolánica del material y el tipo de productos de hidratación se determinó mediante difracción de rayos X (DRX y análisis termogravimétrico (TG/DTG. Adicionalmente, se determinó el calor de hidratación liberado con base en la norma ASTM C186. Los resultados indican que el proceso de hidratación de pastas adicionadas con FCC es altamente exotérmico como consecuencia de su actividad puzolánica a cortas edades. Las fases principales presentes en el proceso de hidratación de las pastas adicionadas con FCC fueron CSH, CAH y CASH, productos similares a los obtenidos en pastas adicionadas con metacaolín.

  11. Un modelo hedónico de precios en línea de automóviles usados en Argentina || A Hedonic Model of Online Prices of Used Cars in Argentina

    Directory of Open Access Journals (Sweden)

    Ramírez Muñoz de Toro, Gonzalo R.

    2017-12-01

    Full Text Available Los modelos de precios hedónicos permiten detectar relaciones latentes entre el precio de un bien y diversas características del mismo. Utilizamos datos de sitios en línea de Argentina sobre autos usados para ajustar un modelo amplio. Encontramos como significativas diversas características de prestaciones y propias del tipo de vehículo y su equipamiento. Se observan diferencias regionales de precios así como una persistente asociación de los vehículos de producción nacional con precios bajos. || Hedonic pricing models detect latent relationships between the price of a good and its different features. We have used data from online sites from Argentina on used cars to fit a broad model. Various features are significant such as performance, characteristics and equipment according to each vehicle type. Both regional differences in prices and a persistent association of domestically produced vehicles with low prices are observed.

  12. Caracterização textural, morfológica e estrutural de catalisadores automotivos novos e usados Textural, morphological and structural characterization of new and used automotive catalysts

    Directory of Open Access Journals (Sweden)

    R. A. Silva

    2009-06-01

    Full Text Available Conversores catalíticos ou catalisadores automotivos são formados por metais nobres como platina, paládio, ródio e molibdênio, suportados em filmes de alumina depositados em cordierita, um material cerâmico poroso, os quais convertem gases poluentes em dióxido de carbono, água e nitrogênio, produtos não poluentes. Neste trabalho, é discutida a desativação de catalisadores automotivos devido às altas temperaturas de operação e por contaminação inorgânica originária dos combustíveis e óleos utilizados. Catalisadores novos e usados foram analisados por adsorção gasosa, picnometria, difração de raios X, e microscopia eletrônica de varredura para caracterizações texturais, morfológicas e estruturais. Microssonda eletrônica foi utilizada para detectar a composição dos catalisadores e dos seus contaminantes.Catalytic converters or automotive catalyst are formed by noble metals such as platinum, rhodium, palladium, and molybdenum supported in cordierite, a porous ceramic materials which convert the pollutant gases in carbon dioxide, water and nitrogenous, no-pollutant products. In this work, we discuss the deactivation of automotive catalyst due to the high operation temperature and by inorganic contaminants originating in engine oil and fuel. New and used catalysts were analyzed by gas adsorption, picnometry, X-ray diffraction, thermal analyses and scanning electron microscopy for textural, morphological and structural characterization. EDS and WDS electron microprobe were used to detect the composition of the catalysts and their contaminants.

  13. Seletividade de agrotóxicos usados na produção integrada de maçã para adultos de Trichogramma pretiosum Side effects of pesticides used in integrated production of apple in adults of Trichogramma pretiosum

    Directory of Open Access Journals (Sweden)

    Cristiane Gindri Manzoni

    2006-10-01

    Full Text Available O objetivo deste trabalho foi avaliar a seletividade de 12 agrotóxicos usados na produção integrada de maçã, em laboratório (temperatura 25±1ºC, umidade relativa 70±10% e fotófase de 14 horas, tendo-se exposto adultos de Trichogramma pretiosum a resíduos secos dos agrotóxicos, na máxima dosagem recomendada para uso em campo, e tendo-se posteriormente mensurado o número de ovos parasitados por fêmea. Reduções no parasitismo, em relação à testemunha (água, foram utilizadas para classificar os agrotóxicos em inócuo (99%. Foram inócuos os acaricidas Envidor (espirodiclofeno, Kendo 50 SC (fenpiroximato e Ortus 50 SC (fenpiroximato, os fungicidas Antracol 700 PM (propinebe, Midas BR (famoxadona + mancozebe, Palisade (fluquinconazol, Persist SC (mancozebe e Systhane PM (miclobutanil e o inseticida Mimic 240 SC (tebufenozida; o herbicida Polaris (glifosato foi levemente nocivo; os herbicidas Finale (glufosinato sal de amônio e Roundup Original (glifosato foram moderadamente nocivos a T. pretiosum.The objective of this work was to evaluate the side effects of 12 pesticides used in the integrated production of apple, in laboratory (25±1ºC temperature, 70±10% relative humidity and 14 hours photophase, exposing adults of Trichogramma pretiosum to fresh dry pesticide film, in the maximum dosage recommended for field use, with subsequent assessement of the number of eggs parasitized per female. The reduction in the parasitism, compared with the control (water, was used to classify the pesticides as harmless (99%. The acaricides Envidor (spirodiclofen, Kendo 50 SC (fenpyroximate and Ortus 50 SC (fenpyroximate, the fungicides Antracol 700 PM (propineb, Midas BR (famoxadone + mancozeb, Palisade (fluquinconazole, Persist SC (mancozeb and Systhane PM (myclobutanil and the insecticide Mimic 240 SC (tebufenozide were harmless; the herbicide Polaris (glyphosate was slightly harmful; the herbicides Finale (gluphosinate-ammonium and Roundup

  14. Obtención de biodiesel (etil-éster mediante catálisis básica a nivel planta piloto derivado de aceites usados de la industria alimenticia.

    Directory of Open Access Journals (Sweden)

    Claudia Barbosa Reina

    2014-03-01

    Full Text Available Este artículo muestra el proceso realizado para la obtención de biodiesel mediante la reacción de transesterificación, a partir de aceite de cocina usado, etanol e hidróxido de potasio como catalizador. Se realizaron variaciones en la relación de alimentación aceite: alcohol y el tiempo de reacción para verificar el rendimiento. En primer lugar, se realizó una cromatografía de gases para verificar la composición del aceite empleado y una caracterización previa del mismo para evaluar sus propiedades físicas y químicas y, de esta manera, determinar si la materia prima era apropiada como insumo para la producción de ésteres etílicos (Biodiesel. Posteriormente, se llevaron a cabo los ensayos pertinentes en el laboratorio de la Universidad Nacional de Colombia, realizando variación en el tiempo de reacción y en la relación de alimentación aceite: alcohol y evaluando en cada uno de estos el rendimiento, mediante los respectivos balances de materia y cromatografía de gases, para así efectuar el análisis estadístico correspondiente, por el método de regresión lineal múltiple. Con la relación de alimentación aceite: alcohol óptimo, establecido por los balances de materia y cromatografía de gases, se realizó la respectiva reacción de transesterificación en la planta piloto de la Universidad Nacional Abierta y a Distancia. Finalmente, a la muestra obtenida de biodiesel en la planta piloto, se le realizaron las pruebas de caracterización para determinar si el producto obtenido cumplía con los rangos establecidos por la Norma Técnica Colombiana 5444.

  15. Evaluación de productos de descarte de una empresa de bebidas no alcohólicas para ser usados como sustrato fermentable por Sacch a romyces cerevisiae

    Directory of Open Access Journals (Sweden)

    L. Matute-Almeida

    2017-01-01

    Full Text Available Se evaluaron productos de desecho de la industria de bebidas no alcohólicas para ser usados como sustrato fermentable por Saccharomyces cerevisiae , debido a que estos resi duos presentan entre 5,5 a 13 % de azúcares. Bajo un diseño completamente aleatorizado con arreglo factorial 2 3 , se estudió la cinética de crecimiento de S. cerevisiae , empleando un m e dio estéril a base de bebidas no alcohólicas descartadas (cola negra (P con 12% de azúcar , cafeína, ácido fofórico y agua carbonatada o una bebida isotónica ( G con 7% de azúcar , ácido cítrico y sales , cuyos pH fueron ajustados a valores de 4 o 4,5. Los medios fueron inocul a dos con una concentración de 10 g/L de levadura co mercial, siendo i ncub a dos a 30 °C con agitación constante de 100 rpm o de 130 rpm . Se tomaron mue stras cada 2 h, desde la inoc u lación hasta el tiempo final de fermentación (12 h, midiéndose el contenido de sólidos sol u bles, la conce n tración de etanol y la producción de biomasa . El análisis estadístico demostró que el tiempo de inc u bación y el sustrat o influyeron sobre la producción de biomasa (p ˂0,01. La mayor producción de biomasa bajo las condiciones de estudio, se obtuvo cuando se ajustó el pH inicial a 4,5 y usando 130 rpm como velocidad de agitación para ambos sustratos. O b teniéndose 15,4 g/L de bio masa a las 8 h de incubación en el sustrat o P (p˂0,05 y 12,8 g/L de biomasa en el sustrato G. Asimis m o, se logró la remoción del color de las bebidas y una di s min u ción del 10% en los valores de DQO. Con base en estos resultados se puede señalar que es posible emplear bebidas no alcohólicas descar tadas como sustrato fermentable en procesos en donde se inocule, Saccharomyces cer e visiae .

  16. Diesel fuel stability; Estabilidade de oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Marcelo V.; Pinto, Ricardo R.C. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Zotin, Fatima M.Z. [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil)

    2008-07-01

    The demand for the reduction of the pollutants emissions by diesel engines has led to the adoption of more advanced injection systems and concern about fuel stability. The degradation of the diesel fuel can happen during storage and distribution, according to the acid-catalysed condensation of aromatic compounds such phenalenones and indolic nitrogenated heterocyclic compounds. These precursors appear in several streams used in diesel fuel formulation. In this study the sediment formation in model and real, aromatic and paraffinic fuels, containing such precursors naturally or by addition was analysed. The fuels were submitted to accelerated (16 hours at 90 deg C) and long term (13 weeks at 43 deg C) storage stability tests. The model fuels responded positively to the storage stability tests with formation of sediments, concluding that these methods can be considered adequate to verify the occurrence of the studied degradation process. The real fuels response was even more due to their chemical complexity, composition and impurities. The formation of sediments showed to be affected by the hydrocarbon distribution of the fuels. (author)

  17. 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

  18. DETERMINATION OF REFRACTORY ELEMENTS IN USED LUBRICATING OIL AND IN FUEL OIL BY ICP OES WITH EMULSIFIED SAMPLES

    OpenAIRE

    ROSELI MARTINS DE SOUZA

    2003-01-01

    O conhecimento da concentração dos elementos traço em óleo lubrificante usado é útil para a avaliação de desgastes de componentes específicos de motores.Em óleo combustível, este monitoramento permite avaliar a qualidade do combustível e prever o potencial das emissões de metais no meio ambiente. Neste trabalho, utilizou-se a espectrometria de emissão óptica com plasma indutivamente acoplado (ICP OES) para a determinação de elementos refratários em amostras de ól...

  19. Materiais usados na constituição dos principais componentes de células a combustível de óxido sólido Materials used in the manufacture of the main components of solid oxide fuel cells

    Directory of Open Access Journals (Sweden)

    A. C. Nascimento

    2009-03-01

    Full Text Available As células a combustível de óxido sólido (SOFC são dispositivos capazes de gerar energia elétrica com alta eficiência e baixa emissão de poluentes. As altas temperaturas de operação dessas células (600 a 1000 °C são benéficas no sentido de possibilitar a reforma in situ do combustível utilizado, bem como sua aplicação em sistemas de co-geração de energia, aumentando sua eficiência teórica total que pode chegar entre 80 e 85%. Entretanto, essas altas temperaturas, o contato direto entre materiais de constituições químicas diferentes e a utilização de gases redutores e oxidantes, são alguns dos fatores que impõem severas restrições aos materiais usados na preparação de seus principais componentes. O presente artigo tem como objetivo revisar o desenvolvimento do estado da arte, com relação aos materiais de ânodo, cátodo, eletrólito, interconectores e selantes, usados em SOFCs. Os requisitos necessários para o bom funcionamento de cada componente e os materiais que melhor se adequam aos mesmos são descritos. As vantagens e desvantagens dos principais materiais encontrados na literatura são também comentadas e comparadas.Solid oxide fuel cells (SOFC are devices capable to generate electricity with high efficiency and low emission of pollutants. The high operation temperatures of these batteries (600 to 1000 °C are advantageous, making possible the reform of the fuel used in situ as well as its application in systems for cogeneration of energy, increasing its total efficiency up to values between 80 and 85%. However, these high temperatures require severe restrictions on the materials used in the preparation of their main components. This paper aims to review the state of the art of the developed material as anode material, cathode, electrolyte, interconnects and seals, to be used in SOFCs. The requirements for a good operation of each component and the materials that best fit their specific need are described

  20. ÓLEOS LUBRIFICANTES AUTOMOTIVOS RESIDUAIS: UM ESTUDO DE CASO EM LOGÍSTICA REVERSA

    Directory of Open Access Journals (Sweden)

    Lucas Mello Schuelter

    2016-06-01

    Full Text Available The reverse logistics of waste automotive lubrificants oils is discussed in this work based on the considerations presented in the National Solid Waste Law 12.305/2010, regulated by Decree-low 7.404/2010. Through a case study is point out the specifics of collection processes, storage, handling, transportation and disposal of these products in a disposal company and the risk sources that the workers and the environment are exposed. Finally, it is suggested that improvements in business process to eliminate or mitigate these risks. The methodology considered data obtained through interviews applied during visits to the sewage company. Among the proposed improvements, indicates a more effective program of use of personal protective equipment and preparation of an emergency action plan.

  1. Manejo Microbiológico dos Grânulos de Polímero Acrílico Usados na Prevenção da Dengue/Microbiological Management of Polymer Granule Acrylic Used in the Prevention of Dengue Fever

    Directory of Open Access Journals (Sweden)

    Dante Togeiro Bastos Filgueiras

    2015-06-01

    Full Text Available Objetivos: Efetuar o manejo microbiológico dos grânulos de polímero acrílico usados na prevenção da Dengue. Materiais e Métodos: Para a determinação da presença ou ausência de coliformes totais e fecais, e de E. coli, foram realizadas avaliações utilizando metodologia do kit Colitest®. Foram elaborados cinco recipientes com mudas de planta simulando as condições naturais de vasos de polímero acrílico. Utilizaram-se cinco diferentes grânulos de polímero acrílico adquiridos comercialmente. De tais recipientes foram colhidas sete amostras em dias sucessivos. A leitura foi feita com auxílio de uma lâmpada de ondas longas de 365nm, após realizou-se prova de Indol. Resultado: Em relação ao grupo amostragem, em 11,5% não houve crescimento bacteriano, em 17,2% houve presença de E.coli e em 71,3% coliformes totais, constatando altos índices de contaminação. Discussão: Não há na literatura científica trabalhos semelhantes, porém trabalhos analisando águas de outras fontes evidenciam que a água proveniente dos vasos dos grânulos tem maior potencial de contaminação. Conclusão: Os resultados obtidos permitiram identificar altas taxas de crescimento bacteriano, evidenciando grande risco de contaminação. As informações oferecidas nos rótulos não se encontram nos padrões estabelecidos pela ANVISA. O estudo é de grande importância por efetuar controle de qualidade microbiológico visando à segurança do consumidor em um produto usado na profilaxia do dengue. Objectives: To make the microbiological management of acrylic polymer granule used in the prevention of Dengue fever. Materials and Methods: For the determination of the presence or absence of total and faecal coliform and E. coli, evaluations were performed with the use of the kit Colitest® methodology. Five vases were prepared to plant seedlings simulating the natural conditions of acrylic polymer vases. Five different acrylic polymer granule acquired

  2. Decapod crustaceans used as food by the Yanomami Indians of the Balawa-ú village, State of Amazonas, Brazil Crustáceos decápodos usados na alimentação pelos índios Yanomami da aldeia de Balawa-ú, Estado do Amazonas, Brasil

    Directory of Open Access Journals (Sweden)

    Célio Magalhães

    2006-01-01

    fittkaui, F. platyacanthus. Os nomes indígenas usados para elas são: shuhu, para o camarão, oko e peimatherimi para cada um dos caranguejos pseudotelfusídeos, e hesiki tôtôrema para ambas as espécies de caranguejos tricodactilídeos.

  3. Efeito do tempo de exposição a uma atmosfera coqueificante na microestrutura e nas propriedades de um concreto refratário usado na indústria petroquímica Effect of the exposure time in cokemaking atmosphere on the microstructure and properties of a refractory castable used in the petrochemical industry

    Directory of Open Access Journals (Sweden)

    M. D. Cabrelon

    2012-06-01

    Full Text Available Os concretos refratários usados em unidades de craqueamento catalítico fluidizado (UFCC podem sofrer deterioração pela deposição de coque durante o processo de produção de hidrocarbonetos leves, ocasionando a diminuição do tempo de funcionamento do reator e conseqüente perda financeira para as petroquímicas. Diversos estudos foram feitos, porém nenhum deles aponta conclusivamente para a parcela que esta deposição tem na deterioração do concreto, permanecendo a dúvida se ele é o responsável pelos danos observados macroscopicamente no riser de uma UFCC. Este trabalho visou estudar o efeito do tempo de exposição a uma atmosfera coqueificante sobre um concreto refratário anti-erosivo, classe C, buscando identificar mudanças nas propriedades físicas e microestruturais que evidenciem o mecanismo de degradação e que possam fornecer subsídios para análises conclusivas acerca do entendimento do fenômeno. Para isso, prepararam-se amostras de um concreto usado industrialmente em UFCC, submetidas a um processo de coqueificação forçado em reator piloto. Fixou-se a temperatura e a taxa de aquecimento em 540 ºC e 50 ºC/h, respectivamente, variando-se os tempos de exposição ao gás propeno em 10, 60, 120, 240 e 480 h. Os corpos de prova tiveram suas microestruturas caracterizadas via microscopia ótica e eletrônica de varredura e suas fases por difração de raios X. Outros ensaios complementares foram necessários para o entendimento do fenômeno. Os resultados mostraram que a superfície e a microestrutura do material gradativamente se impregnam de coque, que preenche os poros, as microtrincas e as trincas. Não foram encontradas evidências de microtrincamento em torno dos poros da matriz do concreto preenchidos com coque, porém os agregados apresentam algum tipo de deterioração com o tempo de exposição ao propeno, não necessariamente causados diretamente pelo coque.Refractory castables used in Fluidized Catalytic

  4. The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse O efeito do teor de microsílica e de cimento refratário nas propriedades de LCCs usados em moldagem de alumínio

    Directory of Open Access Journals (Sweden)

    E. A. Firoozjaei

    2010-12-01

    Full Text Available The bonding system in low cement castables is achieved by the use of calcium aluminate cement, microsilica and reactive alumina. The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion resistance and the mechanical and physical properties of the refractory. In the current study, the effects of microsilica and cement contents on the corrosion resistance and the physical and mechanical properties of Andalusite Low Cement Castables (LCCs refractories were investigated. Alcoa Cup test was used to evaluate the corrosion resistance of the castables at 850 ºC and 1160 ºC. The study showed that an increase in the microsilica/cement ratio improves the physical and mechanical properties of the castable, but at the expense of the corrosion resistance. When a fixed amount of BaSO4 was added to the base refractory material, barium celsian along with glassy phase formation was observed to increase with the increase in the microsilica/cement ratio in the refractory. The presence of the glassy phases was noted to lower the positive effect of Ba-celsian formation on improving the corrosion resistance of the refractory. The observed results were validated using thermodynamic calculations which indicated that Ba-celsian phase was more resistant than Ca-anorthite for applications involving contact with molten aluminum.O sistema de ligantes em concretos de baixo cimento é produzido com o uso de cimento de aluminato de cálcio, microsílica e alumina reativa. A razão cálcia/sílica tem importância crucial na formação de fase líquida a altas temperaturas e posteriormente na resistência a corrosão e nas propriedades mecânicas e físicas do refratário. Neste trabalho foram investigados os efeitos do teor de microsílica e de cimento na resistência à corrosão e nas propriedades mecânicas e físicas de refratários de baixo teor de cimento Andalusita (LCC. O teste da Alcoa foi usado para

  5. Increased production of naphtenic lubricants using more active catalysts; Aumento da producao de lubrificantes naftenicos usando catalisadores mais ativos

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Anita Eleonora F.; Lima, Anie Daniela M.; Figueiredo, Joao B.; Nogueira, Wlamir S.; Zotin, Jose L. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    PETROBRAS produces lubricant base oil in three of its refineries: Duque de Caxias (REDUC), Landulpho Alves (RLAM) and Lubricants and Derivatives of Petroleum of Northeast (LUBNOR). LUBNOR, which began its operation in 1998, is the only refinery that produces naphtenic lubricant base oils with a current capacity of 60.000 m{sup 3}/year. It processes Brazilian naphtenic crudes in a vacuum distillation unit to produce distillates, which are then fed in to a hydrotreatment unit (HDT). This HDT unit processes 170 m{sup 3}/day to obtain base oils NH-10, NH-20, NH-140 and ISOVOLT. In 2007, an evaluation study of new catalysts was made for this unit at PETROBRAS Research Center (CENPES) aiming to increase the production capacity of the HDT unit. The concept was based on increasing the catalytic activity in the HTD unit by testing new catalysts and operating conditions in a pilot-plant unit. The results obtained were very promising showing that a selected catalyst achieved the normal production rate maintaining the same high quality product at a temperature lower than the conventional process. Alternatively, a 77% increase in the throughput capacity was achieved when the normal reaction temperature was applied to this selected catalyst. (author)

  6. Contribuição para o estudo do tratamento de águas residuais provenientes da indústria de extração de petróleo

    OpenAIRE

    Alves, Shari Liliana Machado

    2014-01-01

    Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente – Perfil Engenharia Sanitária O petróleo é um fator preponderante na tecnologia e no progresso. A sua principal utilização é na produção de energia, onde o seu consumo é líder relativamente às outras fontes de energia. Além da referida utilização, é também usado como produto primário na indústria química, nomeadamente na criação de produtos farmacêuticos, de plásticos e de lubrificantes. Para além do petróleo, o pr...

  7. Controle de Acacia farnesiana e de Mimosa pteridofita em pastagem Control of Acacia farnesiana and of Mimosa pteridofita in pastures

    Directory of Open Access Journals (Sweden)

    Ricardo Carmona

    2001-10-01

    Full Text Available Conduziu-se um experimento com o objetivo de estudar a eficácia agronômica e econômica de herbicidas para o controle de duas sérias plantas daninhas de pastagens: Acacia farnesiana e Mimosa pteridofita. Os produtos utilizados, por meio de pincelamento no toco, foram o óleo diesel, óleo lubrificante usado de trator, solução aquosa de 2,4-D + picloram e solução oleosa de 2,4-D + picloram. À exceção do óleo lubrificante, os herbicidas foram testados em dois tamanhos de planta daninha e duas alturas de corte. Avaliaram-se a porcentagem de controle e o vigor de brotação das plantas não-controladas. Concluiu-se que o corte das plantas só é eficiente no controle das duas espécies, quando realizado no nível do solo e seguido da aplicação de herbicida específico, como o 2,4-D + picloram. O óleo diesel também controla totalmente ambas as espécies, e com menores custos que o 2,4-D + picloram, porém apenas quando aplicado nas plantas mais jovens. Há incompatibilidade entre o óleo diesel e o 2,4-D + picloram no controle das duas espécies. O óleo lubrificante usado não apresenta nenhum efeito herbicida em plantas adultas destas espécies.An experiment was carried out to study the efficacy of herbicide treatments in controlling two serious pasture weeds: Acacia farnesiana and Mimosa pteridofita. The following herbicides were applied to the stump, after cutting: diesel oil, used engine lubricant oil, 2,4-D + picloram diluted in water or diesel oil and a control treatment without herbicide. All herbicide treatments were tested on two sizes of the plants and two heights of cutting, except the lubricant oil. The shrub control and sprouting vigor were evaluated in all treatments. The results showed that cutting of plants is effective only when it is carried out at the soil surface level and followed by a specific herbicide treatment, such as 2,4-D + picloram. Diesel oil controlled 100% of the younger plants of both species, at lower

  8. Study of methane solubility in oil base used in oil base drilling fluid; Estudo da solubilidade de metano em base oleo utilizada em fluido de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Carolina Teixeira da; Mariolani, Jose Ricardo Lenzi [Universidade Estadual de Campinas, SP (Brazil); Ribeiro, Paulo Roberto; Lomba, Rosana Fatima Teixeira; Bonet, Euclides Jose

    2004-07-01

    During drilling a well, it is necessary to prevent and control high pressurized zones because while drilling on those zones, could occur a kick if the formation pressure were higher then downhole pressure, allowing the entering of undesirables fluids from the formation to the wellbore. If the well is not controlled this kick could became a blowout, generating damages to the environment, to the equipment and the human life. When drilling using oil-based mud, the concern related to the well control would be higher due the gas solubility in the mud, which could make it hard to detect the kick, especially in deep and ultra deep waters. In this work we have studied the interaction between methane and organic liquids used in drilling fluids, and the measurement and analysis of the thermodynamic properties of those gas liquid mixtures. There have been measured parameters like the oil formation volume factor (FVF{sub o}), bubble pressure, solubility (Rs) and the density of the saturated liquid in function of methane mole fraction and temperature. The results have shown that the gas solubility, at downhole conditions and during kick circulation, is a factor very important to the safety during well drilling in deep and ultra deep waters. (author)

  9. Sorption of oil in the polyurethane from oil or castor oil; Sorcao de oleo no poliuretano derivado do petroleo ou do oleo de mamona

    Energy Technology Data Exchange (ETDEWEB)

    Florentino, Wagner M; Goulart, Shane A.S.; Mulinari, Daniella R. [Centro Universitario de Volta Redonda (UniFOA), Volta Redonda, RJ (Brazil)], e-mail: wagner-can@hotmail.com

    2011-07-01

    The oil outpouring has caused serious environmental problems. To minimize this damage polyurethane foams have been used. In this work, the use of polyurethane from oil and castor oil, in different polyol/diisocyanate mass ratios, to absorb oil was evaluated. Results revealed that the proportion of polyol and diisocyanate influenced in the sorption capacity and the polyurethane from castor oil presented greater sorption capacity. Of this way, can say that the polyurethane from oil can be replaced by castor oil, contributing to sustainable development. (author)

  10. Aplicaciones del análisis de aceite usado en motores a diesel de uso marino

    OpenAIRE

    Muñoz, Carlos Neder; Marin Lopez, Jose Rolando

    2009-01-01

    El principal parámetro que determina la vida útil de un motor de combustión interna es el lu-bricante, el mismo que está compuesto usualmente de uno o dos tipos de aceites básico más un paquete de aditivos, para seleccionar un aceite de motor, se recomienda guiarse por el manual del fabricante de dicha máquina, en donde se indicará la viscosidad y el nivel de servicio o calidad que deberá tener el lubricante seleccionado. Dependerá de la correcta selección del lubricante que el desgaste de la...

  11. Ingredientes usados na indústria de chocolates Ingredients used in chocolate industry

    Directory of Open Access Journals (Sweden)

    Marissol Richter

    2007-09-01

    Full Text Available Chocolate é um produto comumente consumido, sendo que sua produção tem aumentado nos últimos anos. Produzir chocolates requer um entendimento do consumidor. Os tipos preferidos de chocolate variam em cada país. Os diferentes sabores e usos para o chocolate refletem a história da indústria dos diferentes lugares. O sabor do chocolate é parcialmente determinado pela química do produto. O sabor depende da liberação dos compostos aromáticos, enquanto que a textura é uma função da maneira como o material se funde e quebra na boca. Muitos chocolates disponíveis no mercado são elaborados com ingredientes similares, porém apresentam diferentes sabores. Alguns produtores têm aromas específicos, sendo que existem trocas freqüentes nestes devido a variações no processo, acidez e temperatura, ocasionando variações de aroma e sabor no produto final. Por esta razão, as condições de produção do chocolate são mantidas freqüentemente em segredo. Os ingredientes utilizados na produção de chocolates e de seus produtos têm importante papel na aceitação pelo consumidor e na apresentação do produto.Chocolate is a product widely consumed throughout the world that has seen generally increasing production trends over the last years. Making chocolate requires an understanding of how the consumer perceives it. The preferred type of chocolate varies from country to country. The different tastes and uses for chocolate reflect the histories of the industry in different places. The taste of chocolate is partially determined by the chemistry of the product. Taste depends on the release of flavor compounds in the mouth and nose, while perceived texture is a function of the way in which the material melts and breaks up in the mouth. Most chocolates that are available on the market throughout the world are made from very similar ingredients, yet have very different flavors. Some manufacturers have specific house flavors, and very often this is due to specific changes during the manufacturing process, where changes in holding times, acidity and temperature can give rise to very different flavors in the final chocolate. For this reason, chocolate manufacturing conditions are often kept a closely guarded secret. The ingredients used in chocolate and confectionery products have an important role in consumers acceptance and presentation of the product.

  12. INTEROPERABILIDADE DE APLICATIVOS BIM USADOS EM ARQUITETURA POR MEIO DO FORMATO IFC

    Directory of Open Access Journals (Sweden)

    Max Lira Veras X. de Andrade

    2009-12-01

    Full Text Available O conceito do Building Information Modeling (BIM pressupõe a interoperabilidade e a colaboração entre os profissionais da indústria da Arquitetura Engenharia e Construção (AEC. Todavia, estes profissionais exploram pouco o recurso da colaboração no processo de projeto com o BIM, além do mais, se os aplicativos BIM não possuírem robustez na interoperabilidade a atividade de colaboração e cooperação pode ser ainda mais dificultada. Visando diagnosticar a eficiência dos aplicativos BIM no uso do recurso da interoperabilidade, o presente trabalho empreende um esforço para identificar as principais não conformidades na troca de informações dos modelos do edifício produzidos em aplicativos BIM voltados para arquitetura. Além do mais, discute como estes aplicativos tratam as informações de mesmas famílias de objetos. Este artigo inicia com uma revisão bibliográfica sobre os conceitos de colaboração, interoperabilidade e Industry Foundation Classes (IFC. Em seguida modela um edifício de dois pavimentos nos aplicativos ArchiCAD e Revit. Salva os modelos em arquivos no formato IFC. Importa os arquivos IFC pelo ArchiCAD, Revit e dois aplicativos de visualização. Analisa as não conformidades dos arquivos importados. Os resultados mostram que: ocorrem perdas na qualidade dos modelos do edifício quando importados de arquivos no formato IFC; aplicativos BIM destinados à arquitetura apresentam limitações na informação do modelo do edifício (parte das informações são geradas apenas em 2D; existem não conformidades de padrão na definição das propriedades dos componentes apresentados por diferentes aplicativos BIM, voltados para arquitetura. Como sugestão apresenta exemplo bem sucedido de sistema de compartilhamento de modelos BIM. Para finalizar, mostra que os tradutores de IFC, apesar das melhorias das últimas versões, ainda não são robustos o suficiente para transportar os dados do modelo com a qualidade do original. Palavras-chaves: Building Information Modeling, projeto arquitetônico, interoperabilidade. APPLICATION INTEROPERABILITY BIM USED IN ARCHITECTURE THROUGH THE FORMAT IF ABSTRACT The Building Information Modeling (BIM concept emphasizes interoperability and collaboration between Architecture, Engineering and Construction (AEC industry agents. However, aside from the fact that these agents haven´t explored all potentiality of technology supported collaboration, there is also the fact that BIM software are inefficient to allow fluent data exchange between different applications; therefore, making it more difficult to collaborate and cooperation through data sharing. In order to diagnose the maturity of BIM applications in interoperability resources, a study was developed to indentify the major non-conformities of building information models represented in the IFC format generated by architecture BIM authoring software. Therefore, this paper discusses how these applications handle information from the same families of objects when exported and imported to and from the IFC format. The first part of the article is a revision on collaboration, interoperability and IFC concept. Secondly, a two-story building in ArchiCAD e Revit software is presented. These models are exported to the IFC files format. Afterwards these IFC models are imported or opened in ArchiCAD, Revit and two IFC visualization software and analyses for non-compliance are executed. The results show: losses in consistence of the data model, when building models are imported from IFC models; architectural design BIM software are limited in information model of the building (partial information model are generated in 2D; there is no pattern in design model property, each software develops their own pattern. As a suggestion this paper shows a case of sharing system model, as a successful application of BIM interoperability in AEC industry. In short it shows that IFC, despite improvements in recent versions, are not yet robust enough to support all data representations of building information model for complete exchange between AEC applications. Key-words: Building Information Modeling, architectural design, interoperability.

  13. Métodos usados en Colombia para el estudio del virus de la fiebre amarilla

    Directory of Open Access Journals (Sweden)

    Manuel Roca García

    1946-07-01

    Full Text Available The object of this article is to describe techniques used for the study and maintenance of the virus of yellow fever in the laboratory at Villavicencio, Colombia. The characteristics of ye- Howfever virus are briefly described. The susceptibility of white mice of the "Swiss" strain is discussed, and the technique of their routine use for tests of the presence of virus described. The methods of virus titration, specificity tests and protection tests are explained in some detail. The susceptibility of Colombian monkeys to yellow fever virus and their use as laboratory animals in virus studies are described. The isolation of yellow fever virus from suspected cases of human infection is discussed and the technique of preserving virus by desiccation described. Methods of handling mosquitoes in the laboratory are described, with special reference to techniques adapted to transmission studies with Haemagogus mosquitoes.

  14. MATERIALES COMPUESTOS DE MATRIZ POLIMÉRICA USADOS PARA EL BLINDAJE DE INTERFERENCIA ELECTROMAGNÉTICA

    Directory of Open Access Journals (Sweden)

    Andrés Orlando Garzón Posada

    2017-01-01

    Full Text Available Este trabajo tiene como propósito revisar el estado del arte en la síntesis y caracterización de materiales de matriz polimérica reforzados con compuestos a base de carbón o ferritas para su uso como materiales atenuadores de interferencia electromagnética (EMI. Recientemente, este tipo de materiales han sido objeto de investigación debido a sus potenciales aplicaciones tecnológicas, economía y de ser además ambientalmente amigables, puesto que polímeros o cauchos reciclados se pueden utilizar para su fabricación. Estos compuestos pueden ser empleados en la producción de blindajes electromagnéticos, transductores, entrega focalizada de medicamentos, marcación de órganos, hipertermia magnética, etc. Para la fabricación de este tipo de materiales compuestos se usan refuerzos particulados, fibras o láminas y como matrices polímeros termoplásticos o termoestables, cauchos sintéticos o naturales. El método de producción de los compuestos (mezcla fundida, métodos químicos, etc. influye en las propiedades eléctricas, magnéticas y electromagnéticas del material obtenido, debido a la relación de aspecto de los refuerzos: compuestos con elevada relación de aspecto de sus refuerzos tendrán mejores propiedades magnéticas, eléctricas y desempeño frente a la interferencia electromagnética. El blindaje electromagnético de estos materiales se cuantifica a través de la efectividad del blindaje (SE o en otros casos a través de la pérdida reflectiva (RL. Una efectividad de blindaje de 30 dB corresponde a 99,9% de atenuación de la radiación electromagnética incidente. En todos los trabajos se comprueba que las propiedades del compuesto dependen de la cantidad y del tipo de refuerzo adicionado a la matriz.

  15. Ação de inseticidas usados na cultura do milho a Trichogramma pretiosum Riley, 1879

    OpenAIRE

    Souza, Jander Rodrigues de

    2014-01-01

    No presente trabalho estudou-se a toxicidade dos inseticidas (g i.a. L-1) betacipermetrina (0,03), clorfenapir (0,60), clorpirifós (0,96), espinosade (0,16), etofemproxi (0,10), triflumurom (0,08), alfacipermetrina/teflubenzurom (0,0425/0,0425) e lambdacialotrina/tiametoxam (0,11/0,083) para Trichogramma pretiosum Riley, 1879 em suas fases imatura e adulta. As formulações comerciais dos produtos foram diluídas em água destilada, nas maiores concentrações recomendadas pelos fabricantes para o ...

  16. Tempo de reepitelização corneana com a instilação de colírio contendo hialuronato de sódio e carboximetilcelulose

    Directory of Open Access Journals (Sweden)

    Luciane Bugman Moreira

    2013-10-01

    Full Text Available OBJETIVO: Avaliar o tempo de reepitelização corneana pós abrasão usando colírios comercialmente disponíveis, um contendo hialuronato de sódio a 0,4%, outro contendo carboximetilcelulose a 1%, e comparar com a reepitelização sem instilação de colírio. MÉTODOS: Foram utilizados 24 coelhos, nos quais foi feita a abrasão mecânica da córnea nos 8 mm centrais. Esses animais foram divididos em três grupos. O primeiro grupo recebeu um colírio disponível comercialmente contendo hialuronato de sódio 0,4%, o segundo recebeu um colírio contendo carboximetilcelulose 1% e o terceiro não recebeu nenhuma droga. A avaliação foi feita a cada 24 horas por meio da análise de fotografias digitais sob luz azul de cobalto e coramento das córneas com fluoresceína a 2%. O estudo das imagens foi feito pelo sistema de análise de imagens do Autocad 2009®. A análise dos dados foi feita comparando o tempo total de reepitelização da córnea e a cada 24 horas entre os três grupos. RESULTADOS: A velocidade de reepitelização do grupo que usou colírio contendo hialuronato de sódio foi em média 90 horas; o grupo que usou carboximetilcelulose apresentou média de 105 horas; e o grupo que não usou nenhum tipo de lubrificante apresentou média de 108 horas para total reepitelização. Houve uma melhor performance na reepitelização após 96 horas nas córneas dos coelhos que usaram os colírios lubrificantes, sendo essa diferença estatisticamente comprovada. CONCLUSÃO: O colírio contendo hialuronato de sódio 0,4% mostrou índice de eficácia maior que aquele contendo carboximetilcelulose 1%, e este maior eficácia que o controle. Os resultados encontrados neste estudo mostram que o uso de lubrificantes no processo de reepitelização são de extrema valia e devem ser usados de rotina na clínica oftalmológica.

  17. Development and evaluation of a high performance lubricant for industrial gears; Desenvolvimento e avaliacao de lubrificantes de alto desempenho para engrenagens industriais

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Laura Denise Santiago de; Silva, Ademir Oliveira da [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Oliveira, Adelci Menezes de [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    Nowadays, new machines are submitted to higher efforts with smaller clearances. For them it is necessary to develop high performance lubricants in order to reduce friction, wear and emissions for internal combustion engines. In this work it was developed two lubricants, prepared with MoS{sub 2} (Molybdenum Disulfide) and LIC (Lubricant Intermetallic Compound), and they were compared to commercial oil, at the same viscosity grade ISO VG 320. The oils were tested in a four ball tribometer, at 1200 rpm, at initial temperature of 40 deg C and at 80 kgf. The friction reduction was of 13 % and 18 % for MoS{sub 2} and LIC oil, respectively. The wear was the same for all tested oils. Besides tests in the four ball machine, all oils were characterized by viscosity, demulsibility and atomic emission spectroscopy. The lubricants formulated with solids particles were considered as high performance. (author)

  18. Determinação de metais em óleos lubrificantes, provenientes de motores de ônibus urbano, utilizando a FAAS

    Directory of Open Access Journals (Sweden)

    Eva Lúcia Cardoso Silveira

    2010-01-01

    Full Text Available This work proposed a procedure to examine ashes produced in burning lubricating oils used in public transportation, in Teresina PI. Sulphanilic acid was added to the oil samples, which were burned at 550 °C for three hours and 650 °C for two hours. The ash solutions were analyzed by FAAS and there were significant differences in the metal contents of the waste oil produced from normal car service. The quantification limits in μg g-1 were 5.9 (Fe, 4.4 (Pb, 1.7 (Ni, 2.1 (Cu, and 1.2 (Zn. The results showed positive accuracy and precision with recoveries between 88 and 108%, and RSD lower than 10%.

  19. Synergy and lubricant effect of biosurfactant/biodiesel addition in polymeric fluids; Acao lubrificante e sinergia da adicao de biosurfactante/biodiesel em fluidos polimericos

    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

    The lubricity coefficient (CL) and filtrate volume of the polymeric drilling fluids contained glycerin, paraffin, biodiesel and biosurfactant were investigated to evidence the influence and efficiency when used individually or through associated. All the tested fluids were aged in rotative oven for 16 hours, at 200 deg F. In this study, the association of biodiesel with biosurfactant proved to be promising because it reduced the CL in 87% and the volume of filtered by 22%. Those results become promising when the applicability is approached in perforation of wells, because it means a smaller wear and tear of the drills when we told the lubricity data, and a smaller damage the formation when we provided a smaller invasion of the perforation fluid the formations. To evaluate the effect of the degradation of the products, the fluids were stocked to room temperature by thirty (30) days, being soon afterwards. That time of stockpiling went ideal to the hydration of the molecules, because its viscosity was alters sensibly and influencing positively in the filtrate and in rheologic mediated. (author)

  20. Cottonseed oil for biodiesel production; Oleo de algodao para a producao de biodiesel

    Energy Technology Data Exchange (ETDEWEB)

    Pighinelli, Anna L.M.T.; Park, Kil J. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)], E-mail: annalets@feagri.unicamp.br; Ferrari, Roseli A; Miguel, Ana M.R.O. [Instituto de Tecnologia de Alimentos (ITAL), Campinas, SP (Brazil)], Emails: roseliferrari@ital.sp.gov.br, anarauen@ital.sp.gov.br, kil@feagri.unicamp.br

    2009-07-01

    Crude cottonseed oil is an alternative for biodiesel production, mostly in Mato Grosso State, where its production is the biggest of Brazil. Even being an acid oil, esterification reaction, followed by transesterification, could make possible the biodiesel production. In this study, crude cottonseed oil obtained from expelled process was reacted to evaluate molar ration and catalyst concentration effects in biodiesel yield. Molar ratio varied from 3 to 15 moles of ethanol to 1 mol of oil, and catalyst, from 1 to 5% by oil mass. Statistic analysis showed that none of studied variables was significant, for the values range. Biodiesel yield had a maximum of 88%, for molar ratio of 4.7 and 4.42% of catalyst concentration. A combination of oil with high free fatty acid content and ethanol as alcohol, affected the separation between esters and glycerol. (author)

  1. A computational method for oleo-acoustics, application to hydraulic shock absorbers

    NARCIS (Netherlands)

    B. Koren (Barry); P.F.M. Michielsen (Paul); J.-W. Kars; P. Wesseling

    1995-01-01

    textabstractTo predict high-frequency oil-flow phenomena in hydraulic-shock-absorber designs, a mathematical-physical model is proposed. The model consists of the 2-D unsteady Euler equations in axial-symmetric coordinates and an appropriate equation of state for oil. The main topic of the paper is

  2. Oil base fluids without tensoactive additives; Fluidos a base de oleo sem tensoativos

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Jose Carlos V; Aragao, Atila Fernando L [PETROBRAS, XX (Brazil). Centro de Desenvolvimento de Recursos Humanos Norte e Nordeste

    1990-12-31

    The goal of this paper is to define an ideal oil base fluid composition without tensoactive additives, since these may cause damage to producing formation during drilling or well completion. We investigated the rheological, filtrating and phase separation properties of the systems composed of diesel oil, organophilic clay and a polar agent (water or ethyl alcohol). In order to to that, we used the 286 Baroid digital rotating viscometer, filtrating cells standardized according to the American Petroleum Institute (AP) for temperatures of 25 deg C to 149 deg C and pressures of 6,89 x 10{sup 5} Pa (100 psig) to 3,44 x 10{sup 6} (500 psig), and the setting method, according to the determinations of respectively rheological, filtrating and phase separation parameters. Results proved that the composition: diesel oil-94% v/v, Na Cl saturated solution - 6% v/v and bentone - 17,1 to 22,8 kg/m{sup 3} (6 to 8 lb/bbl), is ideal to meet the properties required for drilling and well completion operations for low densities, that is 0,84% to 1,02 (6,9 to 8,5 ib/gal). In order to obtain densities in the interval of 1,02 to 1,14 (8,5 to 9,5 ib/gal) the system should be condensed with calcite (Ca CO{sub 3}) and the base fluid composition should be : diesel oil-94 to 98% v/v, Na Cl saturated solution - 2 to 6% v/v and bentone 17,1 to 22,8 kg/m{sup 3} (6 to 8 ib/bbl). The average cost per barrel for the systems studied here is of the same order of conventional oil base fluids (with tensoactive additives). (author) 13 refs., 7 figs., 3 tabs.

  3. Fuel vegetable oils under some economic considerations; Oleos vegetais combustiveis sob algumas consideracoes economicas

    Energy Technology Data Exchange (ETDEWEB)

    Mourad, Anna Lucia [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia]|[Instituto de Tecnologia de Alimentos (ITAL), Campinas, SP (Brazil)). Centro de Tecnologia de Embalagem]. E-mail: anna@ital.sp.gov.br

    2006-07-01

    The introduction of bio diesel in the Brazilian energy matrix has been mainly motivated by the governmental actions, which foresees social and economical development to the country in a program that allows the use of different oil seed crops as raw materials for bio fuel production. Cost estimates considering the average price received by the farmer and the oil content of each vegetable shows that the minimum cost of bio fuel was about 1.1(castor bean); 1.8(peanut); 2.0(soy beans); 3.3(corn) higher than the average cost of fossil diesel from 1975 to 2004. Among the evaluated raw materials, only the palm oil had inferior cost compared to the petroleum diesel (0.6%). The oleaginous plants that have a higher oil content and smaller agricultural production cost to produce bio fuels are economically most feasible and they should be prioritized in the Government Program so that it may become economically sustainable along the years, as well as generate adequate profit to the farmers of each culture. (author)

  4. Equilibrio de fases de sistemas compostos por oleos vegetais, acidos graxos e etanol hidratado.

    OpenAIRE

    Cintia Bernardo Gonçalves

    2004-01-01

    Resumo: Este trabalho de tese de doutoramento teve como objetivo avaliar vários aspectos do processo de extração líquido-líquido (ELL) como uma rota alternativa para a desacidificação de óleos vegetais. O conhecimento do equilíbrio de fases do sistema de interesse é essencial para o bom planejamento e desenvolvimento do processo de ELL. O presente trabalho apresenta dados de equilíbrio para sistemas compostos por óleos vegetais (milho/palma), ácidos graxos (oléico/ palmítico) e solvente (etan...

  5. Termoacu Cogeneration: gas, power and oil; Cogeracao Termoacu: gas, energia e oleo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Geraldo Jose; Gomes, Cicero Sena Moreira [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    This paper describes the evolution of a project that involves cogeneration of power and steam for continuous injection in oil wells in the fields of Alto do Rodrigues and Estreito, in Rio Grande do Norte, Brazil. The project combines a PETROBRAS intention for recovering heavy oil in that area with partners intention of generating power to connect in a critical point of the Brazilian Electric System. PETROBRAS studies began in the nineties, when oil wells in that area became old end showed the necessity of some oil recovery technology. In 1999, PETROBRAS and Guaraniana made a partnership for implementation of Termoacu Combined Cycle, that would begin operation as a cogeneration plant for thirteen years, and as combined cycle from that point. The profile of steam injection has been adapted to a new one to comply with the powe r capacity of the Plant, and will operate eight years as a cogeneration plant , four years as a combined cycle with cogeneration and after twelve years as a complete combined cycle with 500 MW of capacity. The project integrates a gas pipeline, a Thermal Power Plant, a Transmission Line to connect to the grid and a Steam Pipeline for steam injection at Estreito and Alto do Rodrigues fields. (author)

  6. Gas inflow in oil base fluids; Influxo de gas em fluidos a base de oleo

    Energy Technology Data Exchange (ETDEWEB)

    Lazaro, Welmar [PETROBRAS, Rio de Janeiro (Brazil). Dept. de Perfuracao. Div. de Fluidos de Perfuracao; Boas, Mario Barbosa V [PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

    1990-12-31

    One of the major problems related to the use of oil base fluids is the dissolution of the natural gas in the fluid. This paper attempts initially at making a bibliographical review of all that was written on the subject of drilling fluids up to now. It also mentions some theoretical aspects regarding the process of gas dissolution in diesel oils, in order to produce an understanding of how the dissolution mechanism is processed. For a same increase in measured volume on the surface, the amount of gas incorporated into the fluid is significantly larger if the gas is dissolved in the oil phase than if it is emulsified in the fluid, as occurs when the fluid is water base. A rig team used to working with water-base fluids may be surprised with the fact that an increase of 20 bbl of fluid on the surface of a 5000 m well can mean the incorporation of about 1800 m{sup 3} of gas, if the fluid is oil-base and all the gas is in solution instead of the incorporation of 900 m{sup 3} if the fluid is water base. This paper has the goal of warning drilling engineers and technicians about this problem, as well as presenting charts and equations that allow for a more realistic evaluation of the amount of gas incorporated into oil fluids. (author) 16 refs., 7 figs., 2 tabs.

  7. Alcohol biodiesel from frying oil residues; Biodiesel etilico a partir de oleo de fritura residual

    Energy Technology Data Exchange (ETDEWEB)

    Festa, Brunna Simoes; Marques, Luiz Guilherme da Costa [Universidade Federal do Rio de Janeiro (IVIG/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Inst. Virtual Internacional de Mudancas Globais], E-mail: lguilherme@ivig.coppe.ufrj.br

    2010-07-01

    This paper describes the reaction optimization and production of biodiesel through the use of frying residual oil made available by the restaurant placed at the PETROBRAS Research Center (CENPES-RJ), using ethanol, so that to permit the production of sustainable bio diesel. The environmental gains obtained by the utilization of residual oil, avoiding that this oil be released in the nature, and the economic gains coming from the generation and utilization of ethanol allowing the production of biodiesel be an viable alternative. The obtained results during laboratory tests shown that biodiesel produced from the transesterification in alkaline medium, of the frying residual oil collected presented a reaction yield of approximately 80% considering in mass.

  8. Oil base fluids without tensoactive additives; Fluidos a base de oleo sem tensoativos

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Jose Carlos V.; Aragao, Atila Fernando L. [PETROBRAS, XX (Brazil). Centro de Desenvolvimento de Recursos Humanos Norte e Nordeste

    1989-12-31

    The goal of this paper is to define an ideal oil base fluid composition without tensoactive additives, since these may cause damage to producing formation during drilling or well completion. We investigated the rheological, filtrating and phase separation properties of the systems composed of diesel oil, organophilic clay and a polar agent (water or ethyl alcohol). In order to to that, we used the 286 Baroid digital rotating viscometer, filtrating cells standardized according to the American Petroleum Institute (AP) for temperatures of 25 deg C to 149 deg C and pressures of 6,89 x 10{sup 5} Pa (100 psig) to 3,44 x 10{sup 6} (500 psig), and the setting method, according to the determinations of respectively rheological, filtrating and phase separation parameters. Results proved that the composition: diesel oil-94% v/v, Na Cl saturated solution - 6% v/v and bentone - 17,1 to 22,8 kg/m{sup 3} (6 to 8 lb/bbl), is ideal to meet the properties required for drilling and well completion operations for low densities, that is 0,84% to 1,02 (6,9 to 8,5 ib/gal). In order to obtain densities in the interval of 1,02 to 1,14 (8,5 to 9,5 ib/gal) the system should be condensed with calcite (Ca CO{sub 3}) and the base fluid composition should be : diesel oil-94 to 98% v/v, Na Cl saturated solution - 2 to 6% v/v and bentone 17,1 to 22,8 kg/m{sup 3} (6 to 8 ib/bbl). The average cost per barrel for the systems studied here is of the same order of conventional oil base fluids (with tensoactive additives). (author) 13 refs., 7 figs., 3 tabs.

  9. Peningkatan Kinerja Siakad Menggunakan Metode Load Balancing dan Fault Tolerance Di Jaringan Kampus Universitas Halu Oleo

    Directory of Open Access Journals (Sweden)

    Alimuddin Alimuddin

    2016-01-01

    Full Text Available The application of academic information system (siakad a web-based college is essential to improve the academic services. Siakad the application has many obstacles, especially in dealing with a high amount of access that caused the overload. Moreover in case of hardware or software failure caused siakad inaccessible. The solution of this problem is the use of many existing servers where the load is distributed in the respective server. Need a method of distributing the load evenly in the respective server load balancing is the method by round robin algorithm so high siakad scalability. As for dealing with the failure of a server need fault tolerance for the availability siakad be high. This research is to develop methods of load balancing and fault tolerance using software linux virtual server and some additional programs such as ipvsadm and heartbeat that has the ability to increase scalability and availability siakad. The results showed that with load balancing to minimize the response time to 5,7%, increase throughput by 37% or 1,6 times and maximize resource utilization or utilization of 1,6 times increased, and avoid overload. While high availability is obtained from the server's ability to perform failover or move another server in the event of failure. Thus implementing load balancing and fault tolerance can improve the service performance of siakad and avoid mistakes.

  10. Thermal polymerization of Moringa oleifera oil; Termopolimerizacao do oleo de Moringa oleifera

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Tania M.S.; Novack, Katia M.; Leandro, Cristiano, E-mail: tania@iceb.ufop.br [Departamento de Quimica - UFOP, Campus Morro do Cruzeiro, Ouro Preto, MG (Brazil)

    2011-07-01

    It is increasingly clear both for society and the scientific community, that is necessary to find alternatives to reduce the use of polymeric materials because of their damage to the environment. One way to minimize the environmental problems related to the use of polymers is try to make them quickly degradable. In this study it was obtained a material with polymeric appearance derived from heating of the vegetable oil extracted from seeds of Moringa oleifera. The resulting product is an interesting alternative to obtain polymeric materials that may have biodegradable characteristics, coming from a renewable source and low cost. Moringa oil can be used since it has a high content of unsaturated fatty acids, and its main constituent oleic acid. All samples were characterized by FTIR, NMR and GPC. It was obtained a polymeric material, malleable, high viscosity, with some elasticity, low crystallinity and no unpleasant odor. (author)

  11. Rheological behaviour of hydrocolloids for oil recovery; Comportamento reologico de hidrocoloides para recuperacao de oleo

    Energy Technology Data Exchange (ETDEWEB)

    Correia, Denise Z.; Franca, Francisca P. de; Mothe, Cheila G. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica; Dutra, Eduardo S.S. [Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil); Naccache, Monica F. [Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil). Dept. de Engenharia Mecanica

    2004-07-01

    In crude oil extraction, water can be injected into the well (secondary oil recovery). The amount of the oil extracted decrease after some operation time. In order to improve the oil recovery, polymer flooding would subsequently be used (tertiary oil recovery). The aim of this work was to study the rheological behavior of polyacrylamide, xanthan gum, guar gum and their blends in seawater solutions, and the rheology of a crude oil. Dynamic measurements of the pure polymers (1000 ppm) and blends (2000 ppm) exhibited G' values lower than G'' in low frequencies, and inversion of G' and G'' curves in frequencies between 20 and 30 rad/s. The xanthan gum presented the greatest values of G' when compared to the other polymers, which means that its structure is more rigid. The oil showed G' values lower than G'' values in low and high frequencies of oscillation. Steady measurements revealed pseudoplastic behavior for polymers and Newtonian behavior for the oil. In shear rates around 10 s{sup -1}, polyacrylamide/xanthan blend would be the most appropriate for the extraction of the oil presented. (author)

  12. Producción y Comercialización de Bases y Aceites Lubricantes Partiendo del Aceite Usado

    OpenAIRE

    Espol; Sosa Tobar, Edison Anibal; Castillo Tutiven, Christian Omar; Talbot, Jorge

    2015-01-01

    El aceite lubricante, resulta de un proceso de mezcla de bases lubricantes con aditivos; ambos son productos manufacturados a partir del petróleo en la refinerías. Dentro de sus aplicaciones más comunes están los automotores y la industria en general (transmisiones mecánicas, aplicaciones hidráulicas, etc.) Sin embargo, el empleo del mismo está sujeto a un periodo de vida útil que es el tiempo que tarda el aceite en perder sus propiedades producto de la contminación con partículas metálicas ...

  13. Recommendations to prevention, recovery and disposal of used tires; Recomendacion para la prevencion, recuperacion y disposicion de los neumaticos usados

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-06-01

    Every year the European Union produces 2.000.000 tm of used tires. Most of them are disposed in sanitary landfills. the tires are not hazardous wastes and can be used as raw material for different uses. (Author)

  14. Estudio del mortero de pega usado en el cantón Cuenca. Propuesta de mejora, utilizando adiciones de cal

    OpenAIRE

    González de la Cadena, José Fernando

    2016-01-01

    Esta investigación trata sobre el mortero de pega de mampostería, se estudia los materiales que lo componen, luego las propiedades del mortero de cemento-arena con dosificaciones similares a las de obra y un similar en condiciones de laboratorio, seguido se definen diferentes morteros de cemento-cal-arena. Con todos los morteros se realizan los mismos ensayos, en estado plástico los de: plasticidad, contenido de aire, retención de agua, y en el estado endurecido la resistencia a compresión. A...

  15. Formación de complejos fármaco-resina usados en preparados de liberación prolongada

    Directory of Open Access Journals (Sweden)

    Susana Alba Delgado

    1998-12-01

    Full Text Available Se estudiaron los tiempos para alcanzar el equilibrio en reacciones de intercambio iónico durante la formación de sales complejas poliestireno divinil-benceno sulfonato, con los fármacos dexanfetamina, metilhomatropina y salbutamol. Se hicieron reaccionar sales de los fármacos en solución con la resina en su forma "sodio", cuantificándose a intervalos la concentración en el sobrenadante, siguiendo el avance de la reacción y determinando el punto de equilibrio. Se propone un estadístico simple que permite seleccionar el tiempo para dar por terminada la reacción, y se encuentran valores inferiores a los informados en la literatura. Se comenta la relación entre dimensión molecular y nivel de saturación del complejo.Time intervals required for reaching the proper balance of ion exchange reactions during the formation of polystirene-dyvinil-benzene-sulphonate complex salts with drugs such as dexamphetamina, metylhomatropine and salbutamol are analyzed. Drug salt solutions were caused to react with resin in "sodium" form, then supernadant concentration was estimated at intervals following the development of the reaction and determining the point of balance. A simple statistical method which makes it possible to determine the time when the reaction shall be finished was proposed, and also values lower than those reported in literature were found. Some comment on the association between molecular dimension and the saturation level of the drug-resine complex are made

  16. Reusing of types wastes in way construction. First part; Reutilizacion de neumaticos usados en la construccion de carreteras 1 parte

    Energy Technology Data Exchange (ETDEWEB)

    Tomas Raz, R.

    2001-07-01

    Used vehicle tyres involve an ecological problem, regarding waste products. Both Spanish and European Environmental Standards promote waste recycling instead of waste incineration, which is specifically applicable to waste tyres. The Engineering Group, Elsamex, has developed, through its research centre CIESM, a researching line completely feasible, offering a recycling option based on the addition, by means of three different techniques, of the refused tyres rubber powder to the asphalt mixes for road construction. This is the refused tyre treatment, which contributes, to a greater extent, to a sustainable development, mostly thanks to the great capacity of roads for using this product as raw materials. Added to this, there is an environmental benefit derived from the ecological treatment used with refused tyres, and its efficacy. Moreover, the treatment helps to the production of asphalt mixes with longer durability with a wet process. This allows long term money saving in road maintenance. (Author)

  17. Una reseña de ensayos de carga no destructivos usados para la evaluación de puentes

    OpenAIRE

    Jáuregui, David

    2001-01-01

    El objetivo principal de este artículo es de proveer un breve repaso de la actividad relacionada con la evaluación experimental de los puentes en los Estados Unidos. Los dos métodos de evaluación de carga aplicados por AASHTO (La Asociación Americana de Oficiales de Carreteras Estatales y Transporte) son presentados incluyendo el esfuerzo permisible (AS) y el factor de carga (LF). Además, son discutidos los detalles básicos de los dos tipos de ensayos de carga más comunes para la evaluación d...

  18. Therapeutic properties of whey used as fermented drink Propriedades terapêuticas de soro de leite usado como bebida fermentada

    Directory of Open Access Journals (Sweden)

    T. Kar

    1999-04-01

    Full Text Available Bioconversion of whey for preparation of beverage was standardized by utilizing yoghurt cultures. The product, wheyghurt drink, made with 4% yoghurt cultures inoculated in deproteinized whey (4.8% lactose, 0.66% ash, 0.46% fat and 0.40% protein adjusted to pH 6.4 and incubated at 42oC for 8h had all the technological requisite and dietetic criteria required in the product. The factors affecting the antibacterial activity of wheyghurt drink against Escherichia coli, Staphylococcus aureus, Shigella dysenteriae and Bacillus cereus were determined. There was a significant variation (PA bioconversão de soro de leite para preparação de bebida foi padronizada utilizando culturas de iogurte. O produto feito com culturas de iogurte a 4%, inoculadas em soro desproteinizado (lactose 4,8%; cinzas, 0,66%; gordura 0,46% e proteína 0,40%, pH 6,4, incubado a 42oC por 8h, apresentou todos os requisitos tecnológicos e critérios dietéticos requeridos para o produto. Os fatores que afetam a atividade antibacteriana do produto contra Escherichia coli, Staphylococcus aureus, Shigella dysenteriae e Bacillus cereus foram determinados. Houve uma variação significativa na atividade antibacteriana do produto contendo diferentes níveis de inóculo (1, 2, 4 e 8% e concentração de açúcar a 37, 42 e 45oC. Incubação a 42oC com cultura a 4% no soro apresentou a maior atividade inibitória. O produto armazenado até 5 dias em refrigeração apresentou características organolépticas aceitáveis e microrganismos em quantidade adequada (108 ufc/ml para ser considerado benéfico.

  19. POTENCIALIDADE DO ELEMENTO TÓXICO BERÍLIO, USADO EM PRÓTESES DENTÁRIAS

    Directory of Open Access Journals (Sweden)

    ROLLO João Manuel Domingos de Almeida

    1997-01-01

    Full Text Available Neste trabalho, foi estudado o efeito do berílio sobre a microestrutura e a temperatura de fusão em ligas Ni-Cr-Mo-Co e suas propriedades de corrosão. O estudo consistiu na obtenção das diversas ligas através de fusão sob vácuo, seguidas de forjamento em condições industriais. Após o forjamento, as ligas foram tratadas termicamente em diversas temperaturas e resfriadas em água, ar e forno. Nas ligas Ni-Cr-Mo-Co, a presença do Be altera a microestrutura, proporcionando a formação de fases intermetálicas. Foi constatado que, nas ligas estudadas, o Be abaixa a temperatura de fusão e as torna susceptíveis à corrosão por pite

  20. Velocidade e energia cinética da chuva de um emissor usado em pivô central

    OpenAIRE

    Ferreira, Denise de Jesus Lemos

    2014-01-01

    A erosão decorrente do escoamento superficial causa grande impacto no potencial produtivo das áreas cultivadas. Portanto, o estudo da velocidade e da energia cinética com que as gotas de água atingem a superfície do solo irrigado é de fundamental importância para o desenvolvimento de diagnósticos e medidas que visem minimizar os efeitos negativos no manejo das áreas irrigadas. Nesse sentido, o objetivo do trabalho foi avaliar a velocidade de impacto e a energia cinética de chuvas artificiais ...

  1. MOOC basados en competencias y usados como herramientas de capacitación: el caso Vagones de Ciencia

    Directory of Open Access Journals (Sweden)

    Ricardo Mendoza González

    2014-04-01

    Full Text Available Los cursos en línea masivos y abiertos (MOOC, por sus siglas en inglés se han utilizado en los últimos años como una herramienta poderosa para la educación en línea; son fácilmente adaptables a múltiples contextos de capacitación y aprendizaje. En este artículo se canalizaron las virtudes y características de los MOOC hacia la alfabetización digital de la población del estado de Aguascalientes con el fin de contribuir a la reducción de la brecha digital. Para lograr este propósito, primeramente se realizó un diagnóstico a los usuarios del programa Vagones de Ciencia y Tecnología, estrategia del Gobierno del Estado para satisfacer la necesidad de competencias digitales en la entidad; se obtuvieron las competencias digitales adquiridas que luego fueron comparadas con las de carácter internacional vigentes. Tal comparación determinó las competencias a transmitir en los MOOC disponibles para miles de personas a través de la plataforma Moodle. Después de implementar la propuesta, se observó un importante reforzamiento del programa, lo cual fue avalado por sus directivos, usuarios y facilitadores. Asimismo, se percibió una reducción considerable de la brecha digital en el estado al visualizarse la incorporación de la propuesta en otros programas públicos similares orientados a este propósito.

  2. RESEÑA DE ALGUNOS REGÍMENES ADUANEROS ESPECIALES USADOS COMO ESTÍMULO A LAS EXPORTACIONES

    OpenAIRE

    Arce Rodríguez, Jorge

    2014-01-01

    Actualmente, la creación de puertos o zonas francas, obedece más bien a razones económicas, ligadas fundamentalmente con la necesidad o conveniencia de promover el desarrollo de una determinada zona del territorio nacional; promover o facilita runa corriente comercial desde el extranjero y con destino a los países vecinos, generalmente medita­rráneos; estimular la creación de complejos industriales o de determinadas industrias y aún, desarrollar industrias manufactu­reras a base de materias ...

  3. Diferencia y transversalidad en la religiosidad de los sectores populares: mirando con telescopio luego de haber usado el microscopio

    Directory of Open Access Journals (Sweden)

    Pablo Semán

    2010-12-01

    Full Text Available ¿Cómo integrar en un análisis el hecho de que en una pocas manzanas de un barrio humilde del Gran Buenos Aires la religiosidad abarca desde las apropiaciones “mágicas” del pentecostalismo, hasta las relecturas rockeras de esa misma religiosidad? He argumentado que la religiosidad de los sectores populares, vis a vis nuestra idea de religión, presenta una diferencia radical, para interrogar la percepción autista de un mundo irracional con que se autocomplace la ciencia social cuando se aproxima a lo religioso. Como esto oscurecía heterogeneidades y lógicas de transformación de las religiosidades populares, he descripto, puntualmente, situaciones que elaboran la religiosidad de los sectores populares de forma circunstanciada y especifica. Aquí integro y presento estas “particularidades” en una pluralidad articulada, de forma agregada, para que pueda observarse el panorama de las diferencias, y por sobre todas las cosas, el hecho de que su conjunción permite asir sentidos y formas de un mecanismo de cambio en las formas de religiosidad que producían sujetos del Gran Buenos Aires a fines de la última década del siglo XX. También discutiré conceptos del análisis de los fenómenos religiosos para cuestionar sus preconceptos secularizantes -modernizantes y/católicos.

  4. Economia criativa e territórios usados: um debate baseado nas contribuições de Milton Santos

    Directory of Open Access Journals (Sweden)

    Lisiane Closs

    Full Text Available Resumo Este trabalho explora a literatura internacional e nacional sobre espaços criativos, destacando os aportes teóricos de Milton Santos sobre territórios e suas contribuições para o tema. Delimita-se um conceito de território criativo que incorpora uma perspectiva crítico-reflexiva de análise para os estudos nesse campo teórico e favorece uma abordagem de desenvolvimento que contemple aspectos das formações econômicas, sociais e simbólicas de um determinado espaço. Ressalta-se o potencial das discussões realizadas para auxiliar o planejamento de políticas públicas voltadas para o desenvolvimento de territórios criativos que integrem: inclusão social, sustentabilidade, inovação e diversidade cultural.

  5. S.O. usados por los clientes de la red de la Universidad Cooperativa de Colombia campus Villavicencio

    OpenAIRE

    Torres Londoño, Carlos Ignacio

    2017-01-01

    El Propósito de este investigación fue el de generar una estrategia de sensibilización en los estudiantes, administrativos y docentes del programa de ingeniería de sistemas de la Universidad Cooperativa de Colombia sede Villavicencio, sobre los riesgos presentes en el momento en el que se conectan con sus dispositivos informáticos a las redes de la universidad. Para esto se realizó una caracterización piloto, en la cual se inspeccionó que conocian los usuarios de algunos terminos de seguridad...

  6. Evaluation of a diesel engine running with stationary mixtures of soybean oil and reused oil diesel; Avaliacao de um motor diesel estacionario funcionando com misturas de oleo de soja reutilizado e oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Maronhas, Maite E.S.; Fernandes, Haroldo C.; Siqueira, Wagner C.; Figueiredo, Augusto C. [Universidade Federal de Vicosa (UFV), MG (Brazil)], Emails: maronhas@gmail.com, haroldo@ufv.br, augusto.figueiredo@ufv.br

    2009-07-01

    The tests were conducted at the Laboratory of Agricultural Mechanization Department of Agricultural Engineering, Federal University of Vicosa using a stationary diesel engine Yanmar brand NS{sub B} 75, with nominal power of 5.8 kw at 2400 rpm, direct injection, and water cooled. This work aimed to examine the reuse of soybean oil to drive the engine stationary. Were used as fuel five mixtures of diesel oil (DO) and soybean oil (OS) re-used in the kitchen of the restaurant of the university in the proportions of 0-100%, 25-75%, 50-50%, 75-25 % and 100-0% respectively. The power and torque of the engine is higher for the mixture showed a 75% OD and 25% OS and 25% lower for DO and 75% OS. The lowest hourly consumption was with a mixture of 25% and 75% OD and OS was 15% lower than for the pure diesel. The values found justifying the use of mixtures of diesel and soybean oil reused, but the technical aspects, especially regarding the wear of the engine, must be evaluated to indicate the use after a long period of engine operation. (author)

  7. Performance evaluation of small scale internal combustion engine with mixtures for diesel oil-palm oil; Avaliacao do desempenho do motor de combustao interna de pequeno porte com misturas oleo diesel - oleo de dende

    Energy Technology Data Exchange (ETDEWEB)

    Seye, Omar; Souza, Rubem Cesar Rodrigues [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Emails: Seye62omar@yahoo.com, rcsouza@internext.com.br

    2006-07-01

    This work aims at the performance evaluation of the Cummins 4B -3.9, an internal combustion engine of maximum power 75 hp (56.6 kW) for small scale power generation, burning different mixtures of diesel fuel and palm oil. The palm oil in nature is mixed manually, what unfortunately will influence the engine performance as it hinders the combustion. The test protocol will include the biodiesel, later on. The emissions were assessed for several proportions of mixture diesel/palm oil covering the strip from 0 to 20% and the results were compared to the engine performance when it operates with diesel only. The motor is coupled to a dynamometer, whose operation consists of the acceleration and deceleration of water in order to simulate the effect of a load being applied to the motor. The system is controlled by the software LT commander that allows the start up and the shutdown of the engine from the screen of the computer that also monitors the following parameters as speed of rotation of the motor (RPM), applied torque (N-m), potency (hp), temperature of the lubricating oil, temperature of the water in the entrance and exit of the motor, and temperature of the environment (deg C), pressures of the lubricating oil and of opening of the injector (mBar). While a flow meter coupled to the piping measures the consumption of fuel, the gas analyzer ECHO Line 6000 it monitors the concentration and temperature of carbon monoxide (CO) (ppm), nitric oxide (NO) (ppm), nitrogen dioxide (NO{sub 2}), (ppm), sulfur dioxide (SO{sub 2}) (ppm) and Oxygen (O{sub 2}) (%) in the exhaust gases. This equipment also determines the combustion parameters as excess of air and the efficiency. The technical results present the efficiency variation, the pressure of the fuel, monoxide carbon, NOx emissions, Oxygen content in the exhaust gases, for the different mixture proportions. Furthermore, the results of economic viability show generation cost values of US$ 135,66/MWh for the motor operating with oil diesel, U$187,19 / MWh for B 10 and US$ 191,71/MWh for B 20. (author)

  8. Experimental evaluation of the performance and emissions of diesel engines using blends of crude castor oil and diesel; Avaliacao experimental do desempenho e emissoes de motores diesel usando misturas de oleo de mamona e oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Pimentel, Valeria Said de Barros; Pereira, Pedro Paulo [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Dept. de Engenharia Mecanica; Belchior, Carlos Rodrigues Pereira [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Dept. de Engenharia Oceanica

    2004-07-01

    This work refers to the experimental evaluation of diesel generators operating with blend of crude castor oil and diesel. Performance and emissions tests were accomplished in a diesel engine of direct injection. Because of the high viscosity of the blend a device was installed on the engine in order to lower the blend viscosity. A comprehensive analysis of the results obtained in these tests indicates the possibility of use of the blend of castor oil and diesel as fuel for diesel-generators, with modifications introduced in the engines. (author)

  9. Energy consumption of an agricultural an agricultural tractor operating in dynamometer using with diesel and chicken oil biodiesel; Consumo energetico de um trator agricola operando em bancada dinamometrica com oleo diesel e biodiesel de oleo de frango

    Energy Technology Data Exchange (ETDEWEB)

    Fiorese, Diego Augusto [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Engenharia Rural], email: dafiorese@yahoo.com.br; Dallmeyer, Arno Udo; Romano, Leonardo Nabaes; Schlosser, Jose Fernando [Universidade Federal de Santa Maria (UFSM), RS (Brazil)

    2011-07-01

    The efficiency of energy use in agricultural machinery is dependent on the efficiency of internal combustion diesel cycle, their genuine propellants. However, some biofuels may offer a better yield due to some peculiar characteristics such distinctions in calorific value. Many studies have demonstrated a better utilization of the energy content when operating with biodiesel and with binary mixtures with diesel oil. In this study, tests were conducted on a dynamometer bench to evaluate the energy consumption of a tractor engine with four cylinders and 53 kW (72 hp), operating with biodiesel and chicken oil mixture with diesel oil. In the tests were evaluated six ratios (B5, B20, B40, B60, B80 and B100). The results showed that increasing the proportion of biodiesel was favorable to improve the utilization of the energy content, thus increasing the thermal efficiency of the engine. The best result was obtained with pure biodiesel (B100) with consumption of 395.47 MJ.h{sup -1}and efficiency of 32.35%. On the other hand the witness had the lowest use B5 with 428.20 MJ.h{sup -1} and thermal efficiency of 30.67%. (author)

  10. Economic and technical considerations on the use of vegetable oils as fuel substitute for diesel oil; Consideracoes economicas e tecnicas sobre o uso de oleos vegetais combustiveis como substituto de oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Mourad, Anna Lucia [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia], Email: anna@ital.sp.gov.br

    2006-07-01

    The introduction of bio diesel in the Brazilian energy matrix has been mainly motivated by the governmental actions, which foresees social and economical development to the country in a program that allows the use of different oil seed crops as raw materials for biofuels production. Cost estimates considering the average price received by the farmer and the oil content of each vegetable shows that the minimum cost of bio fuel was about 1,1(castor bean); 1,8(peanut); 2,0(soy beans); 3,3(corn) higher than the average cost of fossil diesel from 1975 to 2004. Among the evaluated raw materials, only the palm oil had inferior cost compared to the petroleum diesel (0.6%). The oleaginous plants that have a higher oil content and smaller agricultural production cost to produce bio fuels are economically most feasible and they should be prioritized in the government program so that it may become economically sustainable along the years, as well as generate adequate profit to the farmers of each culture. The feasibility of National Program for Biofuels Use and Production and both economical and environmental aspects should also consider the destination of the main by-products of the biofuel productive chain such as the left over cakes after extraction of the oil and glycerine produced during the transesterification process. (author)

  11. Characterization of diesel oil mixtures with soy oil used for activation of engines of internal combustion; Caracterizacao de misturas de oleo diesel com oleo de soja reutilizado para acionamento de motores de combustao interna

    Energy Technology Data Exchange (ETDEWEB)

    Siqueira, Wagner da Cunha; Fernandes, Haroldo Carlos; Teixiera, Mauri Martins; Abrahao, Selma Alves; Leite, Daniel Mariano [Universidade de Vicosa, (DEA/UFV), MG (Brazil). Dept. de Engenharia Agricola], Emails: wagner.siqueira@ufv.br, haroldo@ufv.br, mauri@ufv.br, selma.abrahao@ufv.br, daniel.mariano@ufv.br

    2011-07-01

    Alternative energy sources have been studied in several countries, with emphasis on ways of obtaining and using more efficient. The objective of this work to evaluate and characterize mixtures of diesel oil (DO) with soybean oil reused (OSR), the ratios of 0, 25, 50, 75, and 100% of OSR in relation to specific gravity index viscosity and calorific value. To determine the specific gravity was used beaker, thermometer and a balance for each mixture was adjusted a regression model to estimate the bulk density as a function of temperature (25 to 90 deg C). We analyzed the viscosity of the mixtures using an orifice-type viscometer Saybolt, through regression analysis models were fit to estimate the viscosity as a function of temperature, heating the OSR 100% from 40 to 90 deg C decreased by up 90.4% to its viscosity. The tests were performed calorimetric using a bomb calorimeter determines the calorific value , the variation in calorific value followed a descending order with respect to OD with the increasing content of OSR. The OSR is efficient for use in internal combustion engines in small proportions. (author)

  12. Emulsions treatment of oil / water using clay vermiculite hydrofobized; Tratamento de emulsoes oleo/agua utilizando a argila vermiculita hidrofobizada

    Energy Technology Data Exchange (ETDEWEB)

    Silva, V.C.; Batista, T.S.; Ramos, I.B.M.; Alves, J.J.N.; Sousa, B.V., E-mail: valdetecampossilva@hotmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Departamento de Engenharia Quimica

    2016-07-01

    This study aimed to evaluate the oil removal capacity in synthetic emulsions using clay vermiculite expanded and hydrophobized. Removing and oil adsorption capacity were evaluated from the finite bath assays using the factorial design 2², and the model definition that describes the process by adsorption isotherm. The diffraction patterns confirm that the process of expansion and hydrophobic at 700 ° C increases the spacing between clay layers of vermiculite, as well as the infrared spectrum presents characteristic band of the hydrophobing process. From the isotherms it found that the correlation coefficients showed that the Langmuir, Freundlich, Langmuir sigmoidal Hill Sigmoidal well describe the adsorption behavior of vermiculite clay. However, the experimental data were best fitted to the Hill sigmoid model.(author)

  13. Design of three-phase gravity separators for heavy oils; Projeto de separadores trifasicos para oleos pesados

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Rosivania P.; Bannwart, Antonio C. [Universidade Estadual de Campinas, SP (Brazil); Carvalho, Carlos H.M. de [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    The primary processing of crude oil consists in the separation of oil, gas, water (and solids suspensions, if present), the conditioning of the hydrocarbons for transportation to the refinery, and the water treatment for re-use. With the discovery of significant fields of heavy oil in Brazil, whose densities are close to the density of water and viscosities are about hundreds to thousand times higher than the viscosity of water, the production and primary processing of this fluid with usual technology is not attractive and often unfeasible. It is well known that the demand from the majority of the refineries is that the quantity of water dispersion in the oil (BSW) is below 1%, so this work investigates the behavior of the water dispersion in heavy oil, causing an increase in viscosity and density. Therefore, this work intends to define strategies to efficiently separate these liquids, emphasizing the physical aspects of separation. Mathematica software was used for the equation modeling, which governs the horizontal separation vases dimensioning, allowing the observation of the influence of many variables on the separator dimensions. (author)

  14. Synthesis and characterization of polyanhydride derived from castor oil; Sintese e caracterizacao de polianidrido derivado do oleo de mamona

    Energy Technology Data Exchange (ETDEWEB)

    Borges, Fernando de M.; Reis, Roberta Yonara Nascimento; Nobre, Francisco X.; Matos, Jose M.E., E-mail: robertayonara@gmail.com [Universidade Federal do Piaui (UFPI), Teresina, PI (Brazil)

    2015-07-01

    Polyanhydrides are biopolymers already used as drug carriers, that allow the controlled release of the drug in vivo. Currently, these polymers are produced from a polyol, such as ethyleneglycol. In this work we synthesized a polyanhydride from castor oil, from the derivatization of oil via alcoholysis reaction. The oil was then converted to a monoglyceride (MG) by alcoholysis reaction at 140 °C. The MG reacted with phthalic anhydride (PA) at 100 °C, forming the polymer P1. The polymer was characterized by FT-IR, {sup 1}H and {sup 13}C NMR. These techniques allowed confirmation of the polymer formation. (author)

  15. Environmental compensation application in the oil and gas sector; Aplicacao da compensacao ambiental no segmento de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Lucia H.C.; Pollis, Altaira M. [ICF Consultoria do Brasil Ltda., Rio de Janeiro, RJ (Brazil); Oliveira, Marco A.B. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE)

    2004-07-01

    The regulation of the law no 9.985, of July 18, 2000, by the decree no 4.340, of August 22, 2002, awake the productive sector to the imposition to the entrepreneur that must destine the amount of at least 0,5% of the total costs foreseen for the hole undertaking implementation, to implement or maintain environmental conservation units. The most of the environmental agencies have been applied 0,5%. The IBAMA uses a methodology to establish the impact level and the range between 0,5% and 5% to define the environmental compensation percentage and is questionable. Then, until now, this legal requirement have been applied in a heterogeneous form to the environmental licensing. The various applied criterions, the huge subjectivity in the impact level assessment, and the influence of this requirement in the licensing schedule, associate to the oil and gas sector project costs point to a relevant impact in the feasibility of the oil and gas sector projects. Based in the percentages that IBAMA had established for the oil and gas sector was esteemed some costs destined to the environmental compensation. The law implementation without inhibition of investments in the country depends on the involved sectors articulation. (author)

  16. The different plantations for production of vegetable fuel oils; Os diferentes cultivos para producao de oleos vegetais combustiveis

    Energy Technology Data Exchange (ETDEWEB)

    Mourad, Anna Lucia [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Energia

    2006-07-01

    This paper identifies how the National Program for Production and Use of Biodiesel could spread itself by the geographic regions from the specific characteristics and the present panoram production of those plantations. Combining the productions of dende, peanut, corn, soybean, common coconut, cotton, castor oil, sunflower and canola from each geographic region with average revenue in oil for the reference year of 2004, it was calculated the potential of oil generation for the South (32.9 per cent) and Center West (40.8 per cent) elevated per capita revenue regions are higher than the North and Northeast (3.4 and 10.1 per cent respectively) regions, mainly as function of elevated soybean and corn production.

  17. Diesel oil: self sufficiency is possible for Brazil; Oleo diesel: auto-suficiencia e possivel para o Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Pascalicchio, Agostinho Celso [AES Eletropaulo Metropolitana - Eletricidade de Sao Paulo, SP (Brazil); Universidade Presbiteriana Mackenzie, Sao Paulo, SP (Brazil)]. E-mail: agostinho.pascalicch@AES.com; Franco, Armando Cesar [Universidade Presbiteriana Mackenzie, Sao Paulo, SP (Brazil)]. E-mail: armandofranco@mackenzie.com.br; Bermann, Celio [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia]. E-mail: cbermann@iee.usp.br

    2006-07-01

    This paper addresses to analyze the Brazil possibility to be a self - sufficient diesel oil producer. Diesel increase production as result to modernization effort and technological development implemented by PETROBRAS in its refinery and this increase is greater than internal demand for the product. Furthermore, new alternatives as bio-diesel that is adding to diesel oil up to 2% and vehicular natural gas in urban buses are in implementation process that will allow a decrease in diesel oil demand. With that in the short run Brazil could cease is international condition of oil diesel importer. (author)

  18. Energetic balance of castor oil methyl and ethyl esters; Balanco energetico de esteres metilicos e etilicos de oleo de mamona

    Energy Technology Data Exchange (ETDEWEB)

    Almeida Neto, Jose Adolfo de; Cruz, Rosenira Serpa da; Alves, Jaenes Miranda; Pires, Monica de Moura; Robra, Sabine [Universidade Estadual de Santa Cruz, Ilheus BA (Brazil). Grupo Bioenergia e Meio Ambiente]. E-mails: jalmeida@uesc.br; Parente Junior, Expedito [Tecnologias Bioenergeticas Ltda. (TECBIO), Fortaleza, CE (Brazil); Fundacao Nucleo de Tecnologia Industrial (NUTEC), Fortaleza, CE (Brazil)]. E-mail: expeditojr@tecbio.com.br

    2004-07-01

    Castor oil (Ricinus communis L.) is one of the cultures chosen by the biodiesel federal and state programs to supply raw material for biodiesel production - a biofuel indicated as renewable and less pollutant than its fossil competitor. An energetic balance was performed based on LCA - Life Cycle Analysis principles and Input-Output Analysis, comparing the castor oil energy performance with others traditional cultures: colza (Brassica napus) in Europe and soybean (Glycine max) in the United States. Energy balance (O-I) was positive in both production ways (methyl and ethyl) independent of coproduct use allocation alternative. The relation Output-Input (O-I) calculated for castor oil biodiesel [1.3-2.9] was higher than the colza (1.2-1.9) and lower than the soybean (3.2--3.4), independent of the way and allocation of the used byproduct. Both indicators suggest the energy and environmental viability of the castor oil biodiesel, provided that high agricultural productivity (higher than 1.500 kg/ha year) can be guaranteed. The potentialization of the positive energetic and environmental effects depends on the adequate utilization of the coproducts and process residues, the improvement of the energy efficiency in the the castor oil and biodiesel processing and the implementation of efficient management in the use of the chemical inputs (specially the N), responsible for up 5% of the total energy input.

  19. Vegetable Oils as Alternative Solvents for Green Oleo-Extraction, Purification and Formulation of Food and Natural Products.

    Science.gov (United States)

    Yara-Varón, Edinson; Li, Ying; Balcells, Mercè; Canela-Garayoa, Ramon; Fabiano-Tixier, Anne-Sylvie; Chemat, Farid

    2017-09-05

    Since solvents of petroleum origin are now strictly regulated worldwide, there is a growing demand for using greener, bio-based and renewable solvents for extraction, purification and formulation of natural and food products. The ideal alternative solvents are non-volatile organic compounds (VOCs) that have high dissolving power and flash point, together with low toxicity and less environmental impact. They should be obtained from renewable resources at a reasonable price and be easy to recycle. Based on the principles of Green Chemistry and Green Engineering, vegetable oils could become an ideal alternative solvent to extract compounds for purification, enrichment, or even pollution remediation. This review presents an overview of vegetable oils as solvents enriched with various bioactive compounds from natural resources, as well as the relationship between dissolving power of non-polar and polar bioactive components with the function of fatty acids and/or lipid classes in vegetable oils, and other minor components. A focus on simulation of solvent-solute interactions and a discussion of polar paradox theory propose a mechanism explaining the phenomena of dissolving polar and non-polar bioactive components in vegetable oils as green solvents with variable polarity.

  20. Heavy oil recovery: the challenger to minimize environmental damages; Recolhimento de oleo pesado: o desafio para reducao de impactos ambientais

    Energy Technology Data Exchange (ETDEWEB)

    Maia, Frederico de Azevedo; Wegner, Isaac Rafael [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    The maritime accidents that result in oil spill are high on the public environmental concerns, because of these; the oil industry has a high priority to prevent and control them. Heavy oils, the most difficult kind of oil to be recovered, could impact the maritime environmental with a different approach, it could impact the water column and the sea bottom, so much different them the float oil. One these environmental impacts could be done by. This challenger have been overcome by the development of procedures that manner the heavy oil behavior on waterways, gulf and sea could be understood. Once this process could be understood to become easy monitoring the oil track and mitigate the oil impact on the water environment. This paper describe how the PETROBRAS Environmental Response Team has been establish a mean do conduce this task. (author)

  1. Un nuevo caso de resistencia a un bismuto oleo-soluble: curación por una sal insoluble

    Directory of Open Access Journals (Sweden)

    Ch. Petouraud

    1934-07-01

    Full Text Available Acabamos de observar, simple coincidencia o efecto de la casualidad, un nuevo caso de bismuto resistencia que recuerda al que uno de nosotros encontró recientemente con el Profesor Nicolas. S. Joseph, 24 años, es visto por primera vez el 6 de mayo de 1933, en la consulta del servicio hospitalario de Dermato-Syphiligraphie de Antiquille (ficha Nv 5886, Dr. Gaté, para accidentes secundarios típicos; roséola discreta, sifilides papulosas y córneas de las regiones palmares, ganglios supraepitrccleanos y oervicales, reacción de Wassermann muy positiva en la sangre.

  2. Shale oil production chain mapping; Mapeamento de processos do ciclo de obtencao de oleo a partir do xisto

    Energy Technology Data Exchange (ETDEWEB)

    Tamanaha, Rodrigo T.; Shimabuco, Thays E.; Azevedo, Ricardo C. de; Tomi, Giorgio de [Universidade de Sao Paulo (USP), SP (Brazil). Dept. de Engenharia de Minas e de Petroleo

    2008-07-01

    Reliable rock mechanical information is very important for optimum reservoir development. This information can help specialists to accurately estimate reserves, reservoir compaction, sand production, stress field orientation, etc. In all cases, the solutions to problems involving rock mechanics lead to significant cost savings. Consequently, it is important that the decisions be based on the most accurate information possible. For the describing rock mechanics, cores represent the major source of data and therefore should be of good quality. However, there are several well conditions that cause coring and core recovery to be difficult, for example: unconsolidated formations; laminated and fractured rocks; critical mud losses, etc. The problem becomes even worse in high-inclination wells with long horizontal sections. In such situations, the optimum selections of core heads become critical. This paper will discuss the most important design features that enable core heads to be matched precisely to various challenging applications. Cases histories will be used to illustrate the superior performance of selected core heads. They include coring in horizontal wells and in harsh well conditions with critical mud losses. (author)

  3. Drop Hammer Tests with Three Oleo Strut Models and Three Different Shock Strut Oils at Low Temperatures

    Science.gov (United States)

    Kranz, M

    1954-01-01

    Drop hammer tests with different shock strut models and shock strut oils were performed at temperatures ranging to -40 C. The various shock strut models do not differ essentially regarding their springing and damping properties at low temperatures; however, the influence of the different shock strut oils on the springing properties at low temperatures varies greatly.

  4. Evaluation of the agricultural tractor using biofuel and diesel oil; Avaliacao de um trator agricola utilizando biocombustivel e oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Reny Adilmar Prestes; Pinheiro Neto, Raimundo; Meyer, Wagner; Mendonca, Elton Costa de; Roberti, Marcelo [Universidade Estadual de Maringa (UEM), PR (Brazil)], Emails: raplopes@uem.br, rpneto@uem.br

    2009-07-01

    Test with alternative fuels is essential to evaluate the performance of machines and engines. In this paper, the performance of a tractor in chiseling operation was evaluated using oil diesel and biofuel (oil diesel + soybean vegetable oil mixture). Speed of displacement, slip wheels, force traction bar and fuel consumption was evaluated in areas under tillage and no-tillage. The speed of displacement of the set presented similar behavior in tillage and no-tillage. Bigger values mean force in the bar of traction, slip and fuel consumptions had been observed for no-tillage with the tractor operating with diesel. Bigger values mean consumption the biofuel had been observed in areas under tillage. The coverings of the soil had influenced in the values of force bar traction, slip wheels, speed of displacement and fuel consumption. In the studied conditions, the tests demonstrate that the mixture oil diesel + soybean vegetable oil had not influenced in the performance of the tractor. (author)

  5. Catalyst performance in magnetic esterification methyl soy oil; Desempenho de catalisador magnetico em esterificacao metalica do oleo de soja

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, N.O.; 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

    Growing concerns about the environment have encouraged the search for new fuels, including biodiesel, obtained from lipid sources that react with alcohol and catalyst. This aimed of this study to synthesize type catalyst (Ni-Zn)Fe{sub 2}O{sub 4} and evaluate it in soy oil esterification. The catalyst was synthesized by combustion reaction and characterized by XRD, FTIR and BET. The esterification was carried out at high pressure reactor at 140°C for 1 hour with molar ratio of oil:alcohol 1:15 to 1 and 3% catalyst. From the XRD it was observed the formation of inverted spinel phase. FTIR revealed the presence of the vibrational bands 586, 1381, 1628, 2352, 2922, 3147 and 3457cm{sup -1} and surface area 48m{sup 2}g{sup -1}, 10nm pore diameter and type IV isotherm, suggesting mesoporous material characteristic. The results indicate biodiesel conversion of 31.9% and 27.3% when using 1% and 3% catalyst, respectively. (author)

  6. Thermochemical methods for the treatment of oil contaminated sand; Metodo termoquimico para tratamento de areia contaminada por oleo

    Energy Technology Data Exchange (ETDEWEB)

    Pimenta, Rosana C.G.M. [Fundacao Jose Bonifacio, Rio de Janeiro, RJ (Brazil); Khalil, Carlos N. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2003-07-01

    The Nitrogen Generating System (SGN in Portuguese) is a thermochemical method first developed for cleaning and removal of paraffin deposits in production and export pipelines. SGN is based on a redox chemical reaction between two salts which is catalyzed in acidic pH. The reaction is strongly exothermic and its products are nitrogen, sodium chloride, water and heat. All reaction products are harmless to the environment. In January 2000 there was a major oil spill in Guanabara Bay, Rio de Janeiro, which contaminated 2400 tons of sand. This work, developed at PETROBRAS Research Center (CENPES), was based on SGN technology which has been adapted for cleaning contaminated sand and recovering of spilled oil. By combining simultaneous effects of the SGN treatment such as heating, turbulence and floatation, one can remove, within 98% of efficiency, spilling oil from contaminated sand and removed oil can be securely returned to refining process. SGN technology has proved to be efficient, fast, low cost and ecologically correct method for cleaning contaminated sand and can be applied in loco right after a contamination event. (author)

  7. Thermochemical method for the treatment of oil contaminated sand; Metodo termoquimico para tratamento de areia contaminada por oleo

    Energy Technology Data Exchange (ETDEWEB)

    Pimenta, Rosana C.G.M. [Fundacao Gorceix, Ouro Preto, MG (Brazil)]|[PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Khalil, Carlos N. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    In January 2000 there was a major oil spill in Guanabara Bay, Rio de Janeiro, which contaminated 2400 tons of sand. This work, based on NGS (Nitrogen Generating System) technology, was adapted for cleaning contaminated sand and recovering of spilled oil. NGS is a thermochemical method first developed for removal of paraffin deposits in production and export pipelines. The method is based on a strongly exothermic redox chemical reaction between two salts catalyzed in acidic pH. The reaction products are harmless to the environment and consist of nitrogen, sodium chloride, water and heat. By combining simultaneous effects of the treatment such as heating, turbulence and floatation, one can remove, within 98% of efficiency, spilling oil from contaminated sand. After treatment, removed oil can be securely returned to refining process. The method has proved to be efficient, fast, low cost and ecologically correct method for cleaning contaminated sand and can be applied in place right after a contamination event. (author)

  8. First Brazilian patent for dielectric vegetable oil for transformers; Primeira patente brasileira de oleo dieletrico vegetal para transformadores

    Energy Technology Data Exchange (ETDEWEB)

    Carioca, Jose O.B.; Carvalho, Paulo C.M.; Correa, Raimundo G.C.; Bernardo, Francisco A.B. [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil); Coelho Junior, Luiz G. [2 Companhia Energetica do Ceara (COELCE), Fortaleza, CE (Brazil); Abreu, Rosa F.A. [Universidade Estadual do Ceara (UECE), Fortaleza, CE (Brazil)

    2008-07-01

    The present paper discuss the development of different insulating oils for electric power transformers during the last hundred years and analyze comparatively the potential for the use of vegetable oils as a source for green dielectric oils, due to its high level of biodegradability, nontoxic, material compatibility, good electric strength and insulation properties, long-term oxidative and thermal stability, relatively low pour point and reasonable cost. Based on these premises, the authors developed a new type of insulating fluid based on Brazilian vegetable oils never used before for this purpose. This product is competitive with similar and patented products developed from canola and soya vegetable oils. Recently a new patent related with the process for the production of this fluid was submitted to the World Industrial Property Organization - WIPO. (author)

  9. Production of vegetal oil for energetic purposes; Producao de oleo vegetal com fins energeticos a partir de oleoginosas perenes

    Energy Technology Data Exchange (ETDEWEB)

    Andrade Pinto, R. de [Companhia Paranaense de Energia (COPEL), Curitiba, PQ (Brazil)

    1987-12-31

    The technology to obtain vegetable oil from trans esterification is already dominated. However, the oil grain`s cultures of annual cycle (soy-beans, peanuts, sunflowers) demand fertile and plain lands, which actually ought to be destined for food production, The utilization of slope wise areas, which are often destroyed by means of burning, for the reforestation with perennial oily trees which will be subject for further experimental researches, is studied. Particularly, the studies involves the cultivation of avocado`s varieties, which present pulps with a high oil concentration, in regions of temperate climates. It also involves an analysis of the high productivity and various difficulties to be surpassed, since the development of a simple procedure for thr oils and by-products extraction (in rural properties), until genetic developments of new avocado`s kinds, in order to achieve a better adaptation to the regions climate and to contain a higher oil concentration. 7 refs., 1 tab.

  10. Comparative evaluation of online oil and gas monitor; Avaliacao de monitores de teor de oleo e graxa em linha

    Energy Technology Data Exchange (ETDEWEB)

    Louvisse, Ana Maria Travalloni; Pereira Junior, Oswaldo de Aquino; Jesus, Rafael Ferreira de; Santos, Lino Antonio Duarte dos; Lopes, Humberto Eustaquio [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    Petroleum is predominantly recovered in form of water in oil emulsions, which are stabilised by petroleum resins and asphaltenes, the colloidal disperse components of crude oil. The water phase, separated during the production process, consists of a dilute oil in water emulsion, commonly called produced water.There are a wide variety of methods for determination of oil in produced water that are commercially based on a number of technique. On line continuously monitoring shall be particularly useful in providing information to assist in optimising the separation process and also to attend the environmental legislation for discharge the produced water. There are a wide variety of on line oil in water monitors that are commercially available based on a number of technique. In this paper, a comparative evaluation was made between some methods of on line oil in water detecting. These are light scattering and ultraviolet fluorescence technique. A brief description of the optical methods will be discussed and some of associated problems and limitation are pointed. The work was done in a specific experimental set up that allows the simultaneous pumping of crude oil and water through a calibrated restriction in a pipe has been used. A permanent pressure drop induced by the restriction leads to the dispersion of the oil droplets in the water phase. The monitors based on light scattering technique tested show good agreement between monitor reading and the oil dispersion used. Otherwise for ultraviolet fluorescence based monitors show a significant effect of the variation of oil type. (author)

  11. Digestão de óleo lubrificante encapsulado em forno de microondas com radiação focalizada por adição de amostra ao reagente pré-aquecido

    Directory of Open Access Journals (Sweden)

    Flavia A. Bressani

    2006-12-01

    Full Text Available The applicability of the recently proposed procedure based on gradual sample addition to microwave-assisted pre-heated concentrated acid is limited by the sample viscosity. In this work, lubricating oil samples with high viscosity were encapsulated and manually added to the microwave-assisted pre-heated concentrated digestion mixture. The procedure was applied for determination of Al, Ca, Cr, Cu, Fe, Mg, Ni, P, Pb, Si, Sn, Sr, V, W, and Zn in lubricating oil by inductively coupled plasma optical emission spectrometry (ICP OES. Determined and certified values for Ca, Mg, P, and Zn in lubricating oil were in agreement at a 95% confidence level.

  12. Conversão catalítica do etanol sobre catalisadores suportados em ZSM-5

    Directory of Open Access Journals (Sweden)

    D. S. Lima

    Full Text Available Resumo O petróleo, fonte de energia não renovável, é a principal matéria-prima usada na produção de derivados como combustíveis, lubrificantes e petroquímicos básicos. Neste contexto o etanol, uma matéria-prima renovável, torna-se fonte para a obtenção de hidrocarbonetos de maior valor agregado, tais como, benzeno, tolueno, etc. Este trabalho teve como objetivo avaliar o efeito de diferentes metais suportados em zeólita HZSM-5 para a conversão do etanol em produtos com maior valor agregado. Duas séries de catalisadores foram preparadas com diferentes metais e diferentes teores de Ni em HZSM-5 comercial. As amostras foram caracterizadas por área específica SBET, DRX, TPD-NH3 e TPO. Os ensaios de atividade foram realizados em um reator tubular de leito fixo na faixa de temperatura entre 300 e 400 °C, usando etanol como reagente. Os resultados sugerem que o tipo e a quantidade de metal usado na modificação da zeólita HZSM-5 comercial influencia a seletividade para formação dos hidrocarbonetos superiores, bem como a temperatura de reação. A utilização de menores vazões favoreceu a formação de produtos pesados. A formação dos hidrocarbonetos superiores diminuiu ao longo da reação devido à deposição de carbono sobre a superfície do catalisador.

  13. Calibration of area monitors for neutrons used in clinical linear accelerators; Calibracao de monitores de area para neutrons usados em aceleradores lineares clinicos

    Energy Technology Data Exchange (ETDEWEB)

    Salgado, Ana Paula; Pereira, Walsan Wagner; Patrao, Karla C. de Souza; Fonseca, Evaldo S. da, E-mail: asalgado@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Batista, Delano V.S. [Instituto Nacional do Cancer (INCa), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    This work demonstrates the complexity and the necessary cares for the realization of measurements of neutron fields in rooms for radiotherapy treatment containing clinical accelerators. The acquaintance of the technical characteristics of the monitors and the periodic calibration are actions and fundamental procedures to guarantee traceability and the reliability of measurements

  14. Determination of permeability to gases of concrete used as repository for radioactive wastes; Determinacao da permeabilidade a gas em concreto usado em repositorios para rejeitos radioativos

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, Eloisa Tamie

    1994-12-31

    Concrete is widely used in final radioactive waste repository construction and must have well defined characteristics. The permeability is a property that allows to evaluate the durability of concrete which guarantee the protection of the surroundings. Durable concretes have low permeability which reduces liquids intrusion into the repository and decreases the probability of leaching of soluble radioactive compounds and gases escapes to the human habitat. This work includes: the construction of a camera to measure the permeability coefficient of hydraulic products, by using gaseous nitrogen as a permeation fluid; determination of characteristics of material used in concrete compositions; and tests in concretes with different compositions in which ordinary Portland cement and blast-furnace cement were used. (author). 61 refs., 33 figs., 16 tabs.

  15. A guerra dos pneus: a controvérsia entre Brasil e Comunidades Europeias sobre o comércio internacional de pneus usados

    Directory of Open Access Journals (Sweden)

    Lília Luz

    2013-06-01

    Full Text Available The World Trade Organization (WTO has in their structure a body to settle disputes relating to the maintenance of free trade, which is the Dispute Settlement Body (DSB. In this paper, we analyze the controversial “Brazil - Measures affecting the importation of restored tires”, conveyed in the Brazilian press under the epithet “The War of the tires,” occurred between the years 2005 and 2007 within the aforementioned body. This is a Brazilian imposition of measures restricting the entry of used or restored tires. The ban was not extended to the MERCOSUR countries due to a decision of the Arbitration Court of the economic bloc, which led Brazil to allow the entry of used and restored tires in these countries. Brazil has argued that this would suit what was allowed by the Article XX of the General Agreement on Tariffs and Trade (GATT, but the European Communities (EC understood this as a merely protectionist restrictive measure to trade commerce. The objective here is to investigate whether the adoption of such a measure had actually environmental motive or, on the other hand, sought trade protectionism. It was observed that Brazil really had grounds for the imposition of environmental measures and the EC aimed to use this country as the recipient of its waste tires, which, under rigid internal European legislation, could no longer be disposed in its landfills.

  16. The refined of waste oil as sustainable solution: Ecoroil project; El re-refinamiento como solucion sostenible para el aceite usado: proyecto Ecoril

    Energy Technology Data Exchange (ETDEWEB)

    Torras, J. M.

    1999-11-01

    Waste oil must be re-refined at all? Or simply burn it all and forget about it? Today`s waste oil is burnt and dumped, thus causing serious and unnecessary pollution of the environment, contamination of the rivers, seas, water sources, soil and atmosphere. Industry and government, both, have fundamental responsibility to use every option to them to reduce pollution and to re-use and recycle before producing more. One of the most effective recycling possibilities is the re-refining. The lubricating oil business is large, profitable and complex. The new technologies in re-refining produce base oils of highest quality which can equal the performance of virgin oil. The ECOROIL Project carried forward by three companies from different sectors, F. L. Iberia - Infineum -Cator, S. A. - has demonstrated it. The paper also provides some light aspects about waste oil and re-refined oils in the last years in Spain. (Author) 4 refs.

  17. Estudio del mecanismo de la corrosión del recubrimiento de cobre químico usado en la protección de los espejos

    Directory of Open Access Journals (Sweden)

    Bolaños-Rodríguez, E.

    2002-04-01

    Full Text Available Darkening of the silver layer in classical glass mirror manufacturing process can be caused by the copper layer corrosion, this may take place by the environment action or residual chemicals remaining on the "mirroring" step. The present work describes a possible mechanism of copper coating corrosion, studying the corrosion product compositions formed inside the "spot". It was found that defect on the silver layer are associated with chemicals and moisture, they produce the copper layer corrosion and the development of blisters in the silver coating.

    El defecto conocido como "nube o mancha", que aparece en los espejos plateados fabricados usando las tecnologías convencionales, se atribuye a la corrosión del recubrimiento de cobre ocasionado por agentes agresivos que pueden atravesar las capas de pinturas, pero otra causa del problema puede estar originada por deficiencias durante las etapas del proceso de fabricación de los mismos. En este trabajo, se propone un mecanismo de la corrosión del recubrimiento de cobre a partir del estudio de la composición de los productos de la corrosión en la mancha. Los cloruros, los iones sodio y el oxígeno, procedentes de varias fuentes del sistema, reaccionan formando sales y óxidos de cobre que producen el ampollamiento de la película de plata, la ruptura de la misma y la presencia de estos productos de corrosión se refleja con la formación de manchas de diferentes tamaños, colores y formas sobre la superficie del espejo.

  18. Diagnosis and treatment of ADHD: criteria used by different professional categories / Diagnóstico y tratamiento de TDAH: criterios usados por diferentes categorías profesionales

    Directory of Open Access Journals (Sweden)

    Laura Aragão

    2016-06-01

    Full Text Available ABSTRACT: This study aimed to investigate the diagnostic criteria and intervention proposals related to ADHD in different professional categories from the city of Natal, RN, Brazil. In the study participated 34 professionals conveniently selected and a semi-structured interview was conducted with them. After the categorization of information we proceeded to a multidimensional descriptive Cluster analysis. There was an evident division of the whole group into two other groups due to three bigger relevance variables: education, number of sessions used in the diagnosis, and the use of formal instruments. Group 1, formed by physicians, was characterized by the use of two to three sessions and by the use of instruments and formal scales. In Group 2, the average number of sessions was higher than three and all psychologists and most educational psychologist from this group did not use formal scales for diagnosis. We suggest that the academic training determines the diagnostic modalities and intervention modalities for ADHD. RESUMEN: Este estudio tuvo como objetivo investigar los criterios diagnósticos y propuestas de intervención relacionados al TDAH de diferentes categorías profesionales en la ciudad de Natal – RN, Brasil. Participaron 34 profesionales seleccionados por conveniencia y a quienes se les realizó una entrevista semi-estructurada. Luego de la categorización de las informaciones se procedió al análisis descriptivo multidimensional de tipo Clusters. Se hizo evidente la división de la muestra total en otros dos grupos en relación a las tres variables de mayor relevancia: educación, número de sesiones utilizadas en el diagnóstico y uso de instrumentos formales. El Grupo 1, formado por médicos, se caracterizó por la utilización de dos o tres sesiones y por el uso de instrumentos y escalas formales. En el grupo 2, el número promedio de sesiones fue superior a tres y todos los psicólogos y la mayoría de los psicopedagogos no utilizaron escalas formales en el diagnóstico. Se sugiere que la formación académica determina las modalidades diagnósticas y de intervenciones utilizadas junto al TDAH.

  19. Estudio de la transformación del Aceite de Soya usado en ésteres etílicos de ácidos grasos

    OpenAIRE

    Sarracent-López, Anabel; Gandón-Hernández, José

    2016-01-01

    La reutilización de los aceites vegetales en la elaboración de alimentos trae efectos nocivos para la salud y por otro lado se necesita de un complejo tratamiento para poder descartarlos sin que afecten al medio ambiente. Transformarlo en ésteres metílicos o etílicos de ácidos graso y glicerina, mediante la transesterificación con el alcohol correspondiente, puede constituir un procedimiento adecuado para su tratamiento. Se investigó con aceite de soya residual, proveniente de una empresa pro...

  20. Extratos vegetais usados no controle de dípteros vetores de zoonoses Plant extracts used in the control of dipteran vectors of zoonosis

    Directory of Open Access Journals (Sweden)

    M.V Maciel

    2010-03-01

    Full Text Available Os insetos são importantes transmissores de doenças que cada vez mais ocorrem em áreas periurbanas ou urbanas, devido à introdução ou reaparecimento de seus respectivos vetores. As estratégias de controle das doenças transmissíveis por vetores biológicos são de difícil execução, principalmente quando associadas à existência de reservatórios domésticos e silvestres e aos aspectos ambientais. O uso de inseticidas direcionado ao combate de formas adultas de dípteros vetores tem sido freqüente. Entretanto, o amplo uso dos inseticidas sintéticos desde a descoberta do DDT para o controle de pragas domésticas e da agricultura, como também de vetores que transmitem doenças ao homem, levou a uma maior preocupação em relação à toxicidade e impacto ambiental destes agentes. Além disso, a resistência a inseticidas tornou-se uma preocupação crescente na agricultura, economia e na saúde pública. Um grande número de diferentes espécies de plantas representando diferentes áreas geográficas ao redor do mundo tem se mostrado capaz de causar efeitos letais e subletais sobre insetos. Esta revisão aborda a utilização de extratos de plantas com potencial no controle de dípteros vetores de zoonoses.Insects are important transmitters of diseases increasingly occurring in peri-urban or urban areas due to the introduction or the reemergence of their respective vectors. Strategies to control diseases transmitted by biological vectors are difficult to implement, especially when associated with the existence of domestic and wild reservoirs and environmental aspects. The use of insecticides against adult forms of dipteran vectors has been frequent. However, the widespread use of synthetic insecticides since the discovery of DDT to control domestic and agricultural pests, as well as vectors that transmit diseases to humans, has led to greater concern for the toxicity and environmental impact of these agents. Moreover, resistance to insecticides has become an increasing concern in agriculture, economy and public health. A large number of different plant species representing different geographical areas around the world have been capable of causing lethal and sublethal effects on insects. This review addresses the use of potential plant extracts to control dipteran vectors of zoonosis.

  1. Sustec jr nas escolas: conscientização sobre a reciclagem do óleo comestível usado

    Directory of Open Access Journals (Sweden)

    Gabriela Carolina Oliveira

    2016-10-01

    Full Text Available O objetivo desta atividade de extensão foi desenvolver práticas de conscientização sobre sustentabilidade e reciclagem, frisando o descarte correto de resíduos cotidianos, em específico, o óleo residual de fritura. O projeto foi desenvolvido com crianças em idade escolar do 5º ano da rede pública da cidade de Araras, no primeiro semestre de 2014. Entre as escolas disponíveis, foram selecionadas seis, considerando os seguintes critérios: proximidade, disponibilidade do ano escolhido e da coordenação à recepção do projeto. As crianças mostraram-se dispostas a discutir a reciclagem, sua importância e cuidados com o meio ambiente, possuindo ciência sobre a reutilização do óleo residual de fritura, pelo conhecimento popular de familiares e conhecidos. Concluiu-se que a mensagem de conscientização foi eficaz de forma a gerar interesse e discussões sobre o tema. O envolvimento entre universidade e comunidade foi bem-aceito, gerando uma maior proximidade do meio acadêmico com as carências e sabedorias da comunidade

  2. Hygiene monitoring of textiles used in the food industry Monitoramento da higiene de têxteis usados na indústria de alimentos

    Directory of Open Access Journals (Sweden)

    Sabina Fijan

    2006-09-01

    Full Text Available Protective clothing is required in the food-processing industry, to protect workers from contamination by bacteria, fungi, viruses, prions etc. contained in the secretions and raw meat of slaughtered animals, and to protect the meat from being contaminated by microorganisms carried by the workers. It is well-understood that textiles are a control point (CP, and must be appropriately cleaned and disinfected in order to prevent biocontamination. Although the laundering procedure itself is important for achieving disinfection, it is also essential to maintain an appropriate hygiene level in the laundry, in order to prevent recontamination of textiles by environmental viable microorganisms. In this study, a sanitary-microbiological analysis was carried out in selected CPs in two laundries. Chemo-thermal washing efficiency was determined by evaluating the anti-bacterial effect against Enterococcus faecium and Staphylococcus aureus. The hygienic state of the laundries was determined by evaluating the number and type of microorganisms at selected CPs throughout the whole laundering procedure. The results indicated that the sanitary condition of both laundries did not reach the required levels and that several microbes were resistant to cleaning and disinfecting agents. It is obvious from the results that achievement of an appropriate hygiene level during laundering textiles from the food processing industry requires the implementation of appropriate corrective monitoring measures.Na indústria de alimentos é necessário o uso de roupas de proteção, para proteger os trabalhadores da contaminação por bactérias, fungos, virus, prions, etc, encontrados nas secreções e carne dos animais abatidos, assim como proteger a carne da contaminação com microrganismos carreados pelos trabalhadores. Os têxteis são um Ponto de Controle (PC, e devem ser limpos e desinfetados de forma adequada para prevenir a biocontaminação. Embora o processo de lavagem seja importante para obter a desinfecção, é também essencial manter um nível apropriado de higiene dentro da lavanderia para prevenir recontaminação dos têxteis com microrganismos do ambiente. Nesse trabalho, realizou-se uma análise microbiológica de Pontos Críticos de duas lavanderias. A eficiência da lavagem termoquímica foi determinada através da análise do efeito antibacteriano contra Enterococcus faecium e Staphylococcus aureus. A higiene nas lavanderias foi avaliada através da determinação do número e tipos de microrganismos presentes em PCs selecionados no processo de lavagem. Os resultados indicaram que as condições de higiene nas duas lavanderias não atingiram os níveis necessários, e que vários microrganismos apresentaram resistência aos agentes sanificantes e de limpeza, indicando a necessidade de implementação de medidas corretivas apropriadas.

  3. Disposal of waste channels and control rods and radioactive waste; Gestion de canales usados y barras de control como residuos radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Alvarez, L.

    2015-07-01

    Iberdrola and ENRESA are jointly developing a project for the characterization and conditioning of around 200 control rods and 70 used channel from Cofrentes Nuclear Power Plant. This treatment line for high level waste with a radiologic inventory that avoids using the El Cabril low level waste repository is new in Spain and incorporates specific features like the option to carry on with the conditioning stage prior to having a licensed package and available storage facility for this type of waste. (Author)

  4. Management of used channels and control rods as radioactive wastes; Gestion de canales usados y barras de control como redisuos radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Alvarez, L.; Duque, J.; Serrano, G.

    2014-07-01

    During the operation of a nuclear power plant, are generated different types of radioactive wastes. A number of features which include the activity and life average of different radioisotopes present in the material, determine the waste management measures during preparation, transport and temporary or permanent storage. (Author)

  5. Properties of the lithium carbonate for to be used as thermal neutrons detector; Propiedades del carbonato de litio para ser usado como detector de neutrones termicos

    Energy Technology Data Exchange (ETDEWEB)

    Herrera A, E.; Urena N, F. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2003-07-01

    In this work the dosimetric properties of the lithium carbonate used as detecting of thermal neutrons and by means of free radicals is evaluated and presented. The studied parameters that were carried out for this detector were: intensity of the Electron paramagnetic resonance signal (EPR); reproducibility, fading of the signal to ambient temperature, stability of the signal to low temperature (0 degrees); answer of zero dose and homogeneity or reliability of the data of the detector, humidity, solar light, temperature and radio sensitivity. These parameters indicate the utility that have the detectors for the estimation of fields of neutron fluences that are applicable to capture therapies by neutron-boron and, nuclear reactors. (Author)

  6. Revisión de los métodos estadísticos multivariados usados en el análisis de calidad de aguas

    Directory of Open Access Journals (Sweden)

    Ingry Natalia Gómez Miranda

    2016-05-01

    Full Text Available En los ecosistemas acuáticos se monitorea el agua para determinar sus variaciones espacio-temporales, generando grandes y complejas matrices de datos que requieren herramientas que ayuden en la interpretación de los mismos, para que los administradores de los recursos hídricos puedan informar a la sociedad el deterioro de estos y tomar medidas correctivas. El presente artículo es una revisión de tema cuyo objetivo es el examen de técnicas estadísticas multivariadas usadas para examinar la variabilidad espacio-temporal de la calidad del agua. En él se presentan diversas técnicas como el análisis factorial, que se usa con el fin de disminuir la dimensionalidad de los datos y construir factores subyacentes o variables latentes que generen las variables observadas, estos factores pueden usarse e interpretarse como índices de calidad del agua construidos a partir de los datos recolectados; también se presenta en análisis de clúster y el análisis discriminante que se usan comúnmente para estudiar la variabilidad espacial, estudiando similaridades entre períodos o estaciones de muestreo, estas tres técnicas se usan comúnmente con fines exploratorios; para objetivos más complejos como el modelamiento y la predicción, se presentan los modelos jerárquicos, de regresión múltiple y de ecuaciones estructurales. Para todos los métodos se presenta su funcionalidad y aplicabilidad y se ilustran usando casos de estudio. Esta revisión describe cómo estos métodos pueden utilizarse con miras a estudiar la calidad del agua con el fin de monitorear espacial y temporalmente la variabilidad de las medidas tomadas.

  7. Magnetic composites based on natural sources used for removal of oil; Compositos magneticos baseados em fontes naturais usados para remocao de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Grance, E.G.O.; Varela, A.; Daher, E.; Gomes, L.Q.; Michel, R.C.; Souza Junior, F.G. [Instituto de Macromoleculas Professora Eloisa Mano - Universidade Federal do Rio de Janeiro, RJ (Brazil)], e-mail: fernando_gomes@ima.ufrj.br; Rodrigues, C.H.M. [Coordenadoria da Licenciatura em Quimica. Instituto Federal do Espirito Santo, Aracruz, ES (Brazil); Oliveira, G.E. [Departamento de Quimica - Centro de Ciencias Exatas - Universidade Federal do Espirito Santo (UFES), Vitoria, ES (Brazil)

    2011-07-01

    Present paper deals with the preparation and characterization of a magnetic resin based on lignin from Kraft process. This material, due to this aromatic / aliphatic balance is able to oil spill clean up processes. The resin was prepared through bulk polycondensation of lignin, cashew nutshell liquid and formaldehyde in presence of maghemite nanoparticles. Obtained magnetic composites were studied using ATR, FTIR and SAXS. Magnetic force and oil removal capability tests were also performed. Results showed that obtained materials posses a considerable magnetic force and a good oil removal capability. One part of the best material was able to remove eleven parts of oil from the water, making it a good absorber. (author)

  8. Potenciais interações entre medicamentos usados na síndrome metabólica = Potential interactions between drugs used in metabolic syndrome

    Directory of Open Access Journals (Sweden)

    Bandeira, Vanessa Adelina Casali

    2014-01-01

    Conclusões: O tratamento da síndrome metabólica é complexo por requerer a associação de vários medicamentos, o que aumenta os riscos de interações medicamentosas e de efeitos adversos. O presente estudo identificou um grande número de potenciais interações medicamentosas entre esses medicamentos, o que pode reduzir ou potencializar a eficácia dos mesmos e expor o usuário a riscos

  9. Aprovechamiento energético de aceites usados y su contribución a la economía circular mediante elcoprocesamiento en hornos cementeros

    Directory of Open Access Journals (Sweden)

    Andrade-Domínguez, Francisco

    2017-09-01

    Full Text Available The aim of this research was to evaluate the energetic utilization of waste-oils, generated by the Riobamba city car park and its contribution to environmental sustainability, through co-processing in cement kilns. On the other side, to realize an energy valorization identifying the technology of co-processing in cement kilns, proposing alternatives of environmental sustainability, through a system of management before the final disposition of used oils in plants of cement production. The research employed the Variance Analysis (ANOVA as the methodological strategy, as a suitable alternative for the development of variables of the physical-chemical composition of waste oils above co-processing and environmental sustainability criteria. The results show an optimum mixture that complies with physico-chemical properties for the proposed co-processing in the rotary Clinker kiln of UCEM CEMC Chimborazo Factory.In addition, ananalysis of the income of the project was made, proving that it is a profitable project and therefore financially feasible.

  10. Micro controlled system used in the control and in the monitoring of batteries bank; Sistema microcontrolado usado no controle e monitoracao de banco de baterias

    Energy Technology Data Exchange (ETDEWEB)

    Bonacorso, Nelso Gauze

    1991-09-01

    The development of a closed loop micro controlled based system for battery charging, monitoring charge and discharge, and even more, detecting structure failures is presented. The control algorithm is emphasized, being applied a charging method which uses voltage, current and temperature information. The objective of using this control technique is the design of a high performance battery charger, allowing the longest battery life possible, in reliable UPS applications. A prototype has been built and laboratory tested. Experimental results, developed program routines and the system circuits are included. (author)

  11. Polímeros usados como sistemas de transporte de princípios ativos Polymers for drug delivery systems formulations

    Directory of Open Access Journals (Sweden)

    Patrícia Severino

    2011-01-01

    Full Text Available Os diferentes sistemas de transporte têm evidenciado potencial terapêutico para uma grande variedade de princípios ativos, satisfazendo vários requisitos, como a prevenção da sua eliminação rápida do organismo, a redução da sua toxicidade sistêmica, a estabilização e a otimização do seu metabolismo, e o direcionamento específico ao local alvo e os mecanismos de defesa. No entanto, têm sido reconhecidos vários outros desafios associados à liberação específica do princípio ativo ao local alvo, pelo que, para ultrapassar os obstáculos químicos e biológicos, a seleção do polímero utilizado para a preparação do sistema de transporte é de importância crucial. O presente trabalho apresenta um relato sobre os principais polímeros naturais e sintéticos utilizados para a preparação de sistemas de transporte de princípios ativos in vivo.The different carrier systems have shown therapeutic potential for a wide variety of drugs, satisfying multiple requirements, such as prevention of rapid elimination, reducing toxicity, promoting stabilization, optimization of metabolism, drug delivery and defense mechanisms. However, it has been recognized several other challenges associated with the specific release of actives in drug delivery. Therefore, to overcome chemical and biological obstacles, the selection of the polymer used to prepare the transport system is crucial. This paper presents a report on the main natural and synthetic polymers used in the preparation of drug carrier systems in vivo.

  12. Processo da retrolavagem em filtros de areia usados na irrigação localizada Backwash process in sand filters used in localized irrigation

    Directory of Open Access Journals (Sweden)

    Juan C Salcedo

    2011-12-01

    Full Text Available O processo da retrolavagem consiste na passagem da água através do filtro em sentido contrário ao fluxo de filtragem com o objetivo de remover partículas orgânicas e inorgânicas retidas no meio filtrante. O projeto de filtros de areia com configurações ineficientes e a ocorrência de condições operacionais inadequadas contribuem para limitar o desempenho desse processo, causando deficiências na limpeza dos meios filtrantes e comprometendo o funcionamento dos sistemas de irrigação localizada. O objetivo do presente trabalho é proporcionar uma revisão sobre os conceitos associados ao processo da retrolavagem nos filtros de areia, relacionando informações existentes na literatura com experiências de laboratório. Foi gerado um texto básico com informações técnico-científicas sobre o tema, visando a criar um momento de reflexão sobre o processo de retrolavagem e a contribuir para a melhoria do desempenho desses equipamentos na irrigação localizada.The backwash process consists of water passing through the filter in the opposite direction of the filtering flow to remove organic and inorganic particles of media filter. Inefficient sand filters designs and the occurrence of inadequate operating conditions contribute to restrict the process performance, causing deficiencies in the filter cleaning and compromise the operation of localized irrigation systems. The objective of this study is to provide a review about concepts associated with the backwash process in sand filters, relating literature information with laboratory experiments. A basic documentation was produced with technical and scientific information on this subject to create a reflection about the backwash process and contribute to the improvement of the equipment performance in the localized irrigation.

  13. ¿Pueden los micetozoos ser usados como indicadores de salud del suelo en el contexto agrícola de Costa Rica?

    Directory of Open Access Journals (Sweden)

    Reiner Sibaja-Matarrita

    2017-12-01

    Full Text Available El estudio de las poblaciones de micetozoos en agroecosistemas con diversas características y grados de disturbio por actividades antropogénicas es un tema con escasa investigación en el nivel mundial. Con el objeto de estudiar esta interacción, nosotros documentamos la incidencia de dos grupos de micetozoos (mixogástridos y dictiostélidos en dos sistemas agrícolas de caña de azúcar y piña en Costa Rica. Para cada sistema de estudio cuantificamos una serie de variables edáficas, químicas y paisajísticas. Tras el análisis, encontramos que, para ambos grupos, tres variables explicaron el 99 % de la variabilidad de incidencia de estos. Para los dictiostélidos las variables fueron porcentaje de arcilla, pH y Biomasa microbiana. En el caso de los mixogástridos, estas variables fueron el Manganeso, respiración microbiana y pH.  Los resultados anteriores señalan un potencial medio de uso de micetozoos como indicadores ambientales, en tanto el efecto de los sistemas de cultivo sobre la actividad de los microorganismos fue cuantificable. Sin embargo, consideramos que se requiere todavía definir el papel de las diferentes variables medidas sobre la dinámica de ambos grupos de microorganismos para poder establecer una conclusión con potencial aplicación, apoyada por datos empíricos.

  14. Technology of ceramic and polymeric membranes for oil/water separation; Tecnologia de membranas ceramicas e polimericas para separacao oleo/agua

    Energy Technology Data Exchange (ETDEWEB)

    Silva, A.A; Souto, K.M; Silva, Adriano A.; Lira, H.L.; Carvalho, L.H.; Costa, A.C.F.M. [Universidade Federal de Campina Grande (UFCG), PB (Brazil)

    2004-07-01

    In last years, separation techniques by membranes and membranes grew of a laboratory simple tool for an industrial process with a considerable technical and commercial impact. Today, membranes have been being widely used in the treatment of the oily/water, because they offer chemical, thermal resistance and resistance the pressure for a wide variety of alimentation terms. Membrane can be defined as a barrier that separates two phases and that restricts, total or partially, the transportation of one or several present chemical species in the phases. The morphology of the membrane and nature of the material that constitutes are some characteristics that are going to define application kind. The ideal structure for these filters is the asymmetric, formed by one or more layers of different pores size, with gradual reduction of the pores size, when approaches the side filtrate. Having in mind that the environmental legislations more process with membranes offers a new option to face these challenges. The membranes typically used in the oil and water separation act as a barrier for the emulsified oil and solubilization. In the petroleum production and refined oil water mixed with oil is prosecuted in great volumes in lots of processes, this mixture should be treated to separate the oil of water before it can return to the environment or even to be reused in the process. This review aims relate studies done with ceramic and polymeric membranes using a separation oil/water system mounted in laboratory scale in UFCG/CCT/ANP/PHH25. The results show that filtration membranes, micro filtration and ultrafiltration were very effective in oil/water separation. (author)

  15. Evaluation of kraft paper chemical byproducts in insulating mineral oil of energized transformers; Avaliacao de subprodutos quimicos de papel tipo kraft em oleo mineral isolante de transformadores energizados

    Energy Technology Data Exchange (ETDEWEB)

    Portella, Mariana d' Orey Gaivao; Portella, Kleber Franke; Swinka Filho, Vitoldo; Silva, Guilherme Cunha da; Stocco, Guilherme Barrachina; Batista, Douglas Antonio; Sabec, Daiane Cristina; Deger, Claudio Adriano [Instituto de Tecnologia para o Desenvolvimento (LATEC), Curitiba, PR (Brazil)], E-mails: mariana.portella@lactec.org.br, portella@laclec.org.br; Andreoli, Mario Carlos [Centro de Transmissao de Energia Eletrica Paulista (CTEEP), Sao Paulo, SP (Brazil)], E-mail: mandreoli@cteep.com.br

    2011-10-15

    The insulating paper is a major determinant of the remaining lifetime of an electrical transformer, since it is not possible to analyse or replace this equipment during operation. However, using the quantification of the furanic compounds concentration formed in mineral oil, it is possible to infer about the quality of the material, confirming the presence of degradation. Given the existence of new kinds of solid insulation, this research aimed at studying a new analytical methodology, using the techniques of liquid chromatography with mass detection of these substances in order to increase the reliability of the results, assisting the preventive maintenance. (author)

  16. Characterization of contaminated oil with tritium, from of production of gas tripolar scintillators; Caracterizacao de oleo contaminado com tritio, proveniente da producao de centelhadores tripolares a gas

    Energy Technology Data Exchange (ETDEWEB)

    Potiens Junior, Ademar J.; Marumo, Julio T.; Goes, Marcos M.; Isiki, Vera L.K. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    2001-07-01

    The objective of this work was to develop a methodology to estimate the activity level present in radioactive oil samples. This oil is derived from vacuum pumps used to produce tension protector of electronic equipment in telecommunication area. The method consisted in obtain a calibration curve in counts per minute versus tritium activity. After the equipment calibration it was analyzed 3 batches of radioactive oil samples. (author)

  17. Alternatives for optimization of the heavy oil production in onshore marginal fields in Brazil; Alternativas para otimizacao de producao de oleos pesados em campos marginais terrestres no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Arlindo Antonio de [PETROBRAS, Rio de Janeiro, RJ (Brazil); Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia

    2004-07-01

    The intention of this article is to present possible alternatives for optimization of the production of heavy oils in marginal onshore fields in Brazil. The use of gas micro-turbines, the application of SAGD (Steam Assisted Gravity Drainage), the use of the drilling technique for river crossing and to a proposal for a new system of the rig less workovers are approached. The focus is the search of the increment of the production, the increase of the factor of final recovery, the global reduction of the costs and the minimization of the environmental impacts. The volumes of heavy oils in Campos Basin and in national onshore areas they are significant and, therefore, techniques and procedures that optimize its production are strategic. In the Brazilian Northeast there are a series of small fields of low productivity, in general of heavy oils, some in production there are more than twenty years that need of a reduction of the cost for barrel to continue producing. A realistic and responsible posture with the use of probabilistics concepts, techniques of engineering of the reliability, adoption of 'tolerable' levels of risk (associate to the return), attendance on line of the sceneries, premises and criteria, (proposal of the methodology GERISK), are relevant factors that can propitiate not only the reduction of the cost for produced barrel as well as to take the an increase of the factor of final recovery of the field. (author)

  18. Difficulties for innovation in energy technology development: thermoelectric generation with vegetable oils; As dificuldades para a inovacao em rotas tecnologicas de desenvolvimento energetico: geracao termeletica com oleos vegetais

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Jose Antonio Sales de [Universidade de Brasilia (UNB-CDS), DF (Brazil). Centro de Desenvolvimento Sustentavel

    2008-07-01

    Analysis of the vegetable oil as energy source, observing the troubles caused by technology innovation insertion in the Brazilian Electrical Matrix by the use of renewable alternative energy sources while competing with the products and systems' market leaders that use fossil sources. (author)

  19. Evaluation of low toxicity mineral oil base drilling fluids; Avaliacao de fluidos de perfuracao a base de oleo mineral de baixa toxidez

    Energy Technology Data Exchange (ETDEWEB)

    Ponte, Ielton Frederico da [PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

    1989-12-31

    In order to introduce low toxicity mineral oil base drilling fluids in Brazil, we carried out a series with a low aromatic content basic oil for lubricants, produced by PETROBRAS: the Lubrax Industrial OB-9 (Lubind OB-9). This oil, as well as its mixture with aviation kerosene to reduce viscosity, was found adequate for use in drilling fluids together with other national products developed by companies that supply additives for drilling fluids in Brazil. We present the results of laboratory tests with systems of four different manufacturers, one of which was chosen for initial field tests. These tests, which were carried out at the Miranga and Bu River Fields, in the Drilling District of Bahia, produced satisfactory results. We anticipate the use of these fluids in other areas where the company operates. (author) 2 refs., 3 tabs.

  20. Physico-chemical characterization of biodiesel from pests attacked corn oil; Caracterizacao fisico-quimica do biodiesel de oleo de milho danificado por pragas

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Fabia M.; Correa, Paulo C.; Martins, Marcio A.; Santos, Silmara B.; Damian, Amanda D. [Universidade Federal de Vicosa (UFV), MG (Brazil)], Emails: copace@ufv.br, aredes@ufv.br, syllmara@vicosa.ufv.br

    2009-07-01

    The biodiesel is a renewable energy source alternative to fossil fuels. The biodiesel synthesis can be made by many types of triglycerides transesterification, it is possible to use this biofuel in vehicles if it has the quality required from Agencia Nacional de Petroleo, Gas Natural e Biocombustiveis (ANP). Searching an application for pests attacked corn, there is feasibility technical for the biodiesel production from this corn oil. The biodiesel synthesis was made through ethyl transesterification process with alkaline catalyst using ethanol. The biodiesel physical-chemical characterization was performed using ANP methods. (author)

  1. Strategic optimization model and area planning for oil spill response; Modelo de otimizacao estrategico e de planejamento de area para resposta a derramamentos de oleo

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Luiz Rodolfo Tinoco Aboim; Ferreira Filho, Virgilio Jose Martins [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Programa de Engenharia de Producao

    2004-07-01

    This paper deals with strategic aspect of the oil spill response problem, that is, with the problem of deciding where to locate adequate capability to respond to potential oil spills. In addition to locational considerations, the strategic oil spill response problem generally calls for decisions concerning the proper levels and types of equipment to be stockpiled, as well as for policies regarding the allocation of such capability among points of high oil spill potential. The oil spill optimization models can contribute with contingency plans that are prepared by responsible parties . It is described one model that address current legal requirements, in particular, the time-phasing of response, and the use of this model as a decision support by responsible parties. (author)

  2. Study of oil diesel degradation in soil using oxidative advanced processes; Estudo da degradacao do oleo diesel em solo utilizando processos oxidativos avancados

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Suenia S.; Silva, Valdinete L. da; Motta, Mauricio da [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Engenharia Quimica; Silva, Paula Tereza de S. e; Barros Neto, Benicio de [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Quimica Fundamental

    2004-07-01

    Recently it comes if observing several accidents during the exploration, refinement, transport and operation of storage of petroleum and yours derived, such as the diesel oil and the gasoline. In this paper We do a study of the degradation of the diesel oil in a characteristic soil of the state of Pernambuco using peroxide of hydrogen and Fenton reagent. Those two processes are based on the generation of the radical hydroxyl (OH.) that has to can oxidizer loud capable to promote the destruction of recalcitrant organic compositions. The studied soil has about 16,5{+-}0,3 g/kg of total organic carbon. A factorial planning was accomplished 2{sup 3} with 2 repetitions in the central point with the objective of finding the best conditions of degradation of the pollutant. The variables and the studied levels were: FeSO{sub 4} - 0,18 M (0, 4 and 8 Ml); pH (3; without adjustment and without adjustment) and Time of exhibition in the sun (8; 12 and 16:00). The volumes of H{sub 2}O{sub 2} used in the rehearsals were constant, being 80 mL. Soon afterwards it accomplished a fractional experimental planning 2{sup 3-1}, repeating the variables of the first planning, they put using a smaller volume of H{sub 2}O{sub 2}, 40 mL, to evaluate the influence of the amount of H{sub 2}O{sub 2} used about the degradation of the diesel oil. The mass of the soil used in each experiment was of 5 g. It was observed that there were not significant differences in the degradation in relation to the peroxide volume. The best found degradation was around 87% in the following conditions (4 mL of Faith, without pH adjustment, Time of exhibition in the sun of 12:00 and 80 ml of H{sub 2}O{sub 2}). That found degradation was quite satisfactory being still due to study more economical conditions. (author)

  3. Main crops used to obtain fuel from vegetable oils in Brazil; Principais culturas para obtencao de oleos vegetais combustiveis no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Mourad, Anna Lucia [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia], Email: anna@ital.sp.gov.br

    2006-07-01

    This paper tries to identify how the National Program of Production and Use of Biodiesel may unfold itself in different geographical areas starting from the specific characteristics for each cultivation and volume production of each plant at present. By combining the production of palm, peanut, corn, soy beans, coconut, cotton, castor beans, sunflower and canola, of each geographical area, with the average oil yield as compared with the production of 2004, it has been calculated that the potential of oil production from areas in the South (32,9%) and Middle west (40,8%), having a high per capita income, are much higher than the areas the North (3,4%) and Northeast (10,1%), mainly due to the high soy bean and corn production. Considering the participation of all these oleaginous raw materials, it has been considered that it would be necessary to increase about 5% of the actual production of these plants for a later transformation in fuel to supply the bio diesel demand. This modest growth estimate requires caution on the part of the farmers and oil crushers and converters for they must project their investments correctly, so that their production can be absorbed by the market. The oil yield per hectare and the land use per bio fuel ton are indicators which have a great importance to be considered in the national program to evaluate aspects of economic, social and environmental feasibility. (author)

  4. Appearance of instabilities and fingering from interface in water-oil systems; Surgimento de instabilidades e digitacao a partir da interface em sistemas agua-oleo

    Energy Technology Data Exchange (ETDEWEB)

    Quadri, Marintho B.; Machado, Ricardo A.F.; Nogueira, Andre L.; Lopes, Toni J. [Universidade Federal de Santa Catarina, Florianopolis, SC (Brazil). Dept. de Engenharia Quimica; Baptista, Renan M. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2003-07-01

    Many operations and procedures in the petroleum industry are related to the immiscible displacement of a fluid by another one, as the secondary recovery of petroleum and pumping operation through pipelines of high viscosity oils. In this context, an stability analysis of the water-oil interface as well as of the factors that leads to the appearance of the viscous fingering phenomenon, represented by the viscous flowing of one phase that penetrates inside of the other one in the form of one or more fingers, is of major importance for the forecast, simulation and control of operations involving this kind of system. From the theories of perturbation and unstable immiscible displacement of fluids, initially conceived for cells of parallel slabs (Hele-Shaw), the authors intend to extend the concepts and adapt the criteria for the three-dimensional geometry in macroscopic scale. (author)

  5. Oils from different depth in the Alagoas sub-basin distribution and concentration; Oleos em diferentes profundidades na sub-bacia Alagoas: distribuicao e econcentracao

    Energy Technology Data Exchange (ETDEWEB)

    Reboucas, Lucia M.C.; Sant' Ana, Antonio E.G.; Sabino, Adilson R.; Nogueira, Fred A.R.; Moraes, Reinaldo J.R.; Crispim, Alessandre [Universidade Federal de Alagoas (UFAL), Maceio, AL (Brazil). Inst. de Quimica e Biotecnologia . Lab. de Analises de Biomarcadores e Semioquimicos]. E-mail: lmcr@qui.ufal.br

    2008-07-01

    This paper reports the distribution and the concentration of n-alkane homologue series and the HPA compounds in 22 oils from Alagoas sub-basin, Pilar Field, Brazil. The n-alkane profile of whole oil gas chromatograms (CG-FID) to light, medium and heave oils represented no-biodegraded oils. The light and medium oils have n-alkane distribution with a maximum in nC{sub 10} and nC{sub 17}. The ration pristine/phytane (P/F) between 1,5 and 2,7 suggest Lacustrine origin. The nalkane distribution from the heavy oils show two maximum between nC{sub 15} and nC{sub 23}. The concentrations of n-alkane are different to all the 22 oils. The F2 fraction classified as light (API>39), medium (36

  6. Critical analysis in the inventories of methane in oil and gas industry; Analise critica de inventarios de metano na industria do oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Schmall, Vicente; Montez, Edson [PETROBRAS, Sao Luiz, MA (Brazil). Seguranca, Meio Ambiente e Saude; Rosa, Ana Regina [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    The methane contribution arising from anthropogenic activities plays a role of great significance when elevating the concentration of gases of greenhouse effect found in the atmosphere. The methane presents a global warming potential twenty one times higher than the carbon dioxide and its atmospheric lifespan is lower than the other gases of greenhouse effect. Its control is regarded as being one of the most efficient ways to mitigate the global climate changes in the short term, which requires previous quantification of its emissions. PETROBRAS, aiming at achieving its environmental excellence, is implementing a system of management and inventory of gases emission into the atmosphere. The emissions inventory of 2003, published in its Social Sustainability Report appears as a result of this effort. This paper presents a comparison between the results generated by the PETROBRAS' Management and Inventory of Emissions System and those deriving from the application of the methodology suggested by the Intergovernmental Panel on Climate Change (IPCC). The impact of the chosen methodology, the aggregation level and the data availability of the emission sources on the results obtained are highlighted. (author)

  7. Low-visibility and night-time oil spill response operations; Operacoes noturnas e com baixa visibilidade em resposta a vazamentos com oleo

    Energy Technology Data Exchange (ETDEWEB)

    Lyra, Geraldo Marcelo Barroso; Margem, Henrique da Cunha; Skrepnek, Clarissa Cavalheiro; Lyra, Ana Paula Lopes Coelho de Castro; Silva, Ana Claudia Andriolli Vieira da; Antoun, Augusto Resende [Hidroclean Protecao Ambiental, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The expansion on E and P area and the raise on importation and exportation activities by sea, cause not only commercial benefits, but also expressive environmental risks. This fact is reaffirmed by the actions of Brazilian environmental agencies in order to control potential polluter activities. However, these agencies are against any activity related to oil spill incidents that operate at night-time or during low-visibility condition because of the elevated risk of accidents on this kind of operation. In the other hand, delays on start response operation can be expensive by reducing recovery rates and increasing environmental impacts. Thus, this paper objective is to analyze studies and reports of night-time and low-visibility oil spill response operations occurred in other countries, concluding that when the right equipment is used, it is possible to start or continue oil spill operation independent of weather. However, before choose to start an operation at night, an assessment should be make to know if the risks outweigh the benefits, remarking that safety is always the primary concern. (author)

  8. Development of high, medium and low oil content hydro cyclones; Desenvolvimento de hidrociclones para altos, medios e baixos teores de oleo

    Energy Technology Data Exchange (ETDEWEB)

    Moraes, Carlos Alberto Capela; Marins, Luiz Philipe Martinez; Melo, Darley Carrijo de; Silva, Fabricio Soares da [Centro de Pesquisas da Petrobras (CENPES). Gerencia de Tecnologia de Processamento e Avaliacao de Petroleo (Brazil)], e-mails: capela@petrobras.com.br, philipe@petrobras.com.br, darley@petrobras.com.br, fabriciosoares@petrobras.com.br; Oliveira Junior, Joao Americo Aguirre [Engineering Simulation and Scientific Software (ESSS), Florianopolis, SC (Brazil)], e-mail: aguirre@esss.com.br; Souza, Marcos Aurelio de; Barca, Luiz Fernando [Universidade Federal de Itajuba. Instituto de Engenharia Mecanica, MG (Brazil)], e-mails: maurelio@unifei.edu.br, barca@unifei.edu.br; Souza, Adriana Margarida Rodrigues Ferreira de [Fundacao Gorceix (Brazil)], e-mail: adrianamargarida.gorceix@petrobras.com.br; Almeida, Cristina Santos de [Universidade Federal do Rio de Janeiro. Fundacao de Coordenacao de Projetos, Pesquisa e Estudos Tecnologicos (COPPETEC/UFRJ). Escola de Quimica, RJ (Brazil)], e-mail: cristinaalmeida.coppetec@petrobras.com.br

    2008-12-15

    This paper is intended to describe the steps and present the results of a Research and Development (P and D) project aimed at developing and qualifying hydro cyclones for oil and water primary separation by PETROBRAS. The hydro cyclones families for high, medium and low oil content, respectively named as ATO, MTO and BTO were developed in this project and are currently in the patent filing phase. The members of each one of them were initially conceived and analyzed by means of numeric simulations (CFD). The set-ups for these simulations were based on experimental investigation supplemental papers of the fluid-dynamics in hydro cyclones, with the use of Laser Doppler Anemometry (LDA and PIV) in acrylic models. After the selection of the geometries for optimum performance at the CFD, actual size steel prototypes were designed and built for each one of the aforementioned hydro cyclones families. It was also designed and built a two-skid mounted system and one control rack which comprise a Mobile Lab for Hydro cyclone Tests (LMTH, being the acronym in Portuguese) with which field tests were carried out (Buracica Field, Bahia) in the prototypes. As the last phase of the Research and Development (R and D) project, it was prepared a computer routine which allows the performance of a project of a compact separation system for any specific application, using the hydro cyclones of the families aforementioned in series in the streams rich in water. This routine enables, from the features of the fluids in the application in particular, to select the most appropriate hydro cyclone to be used, obtain their corresponding operating conditions and also to obtain an estimate of the minimum performance range expected in the application under analysis. (author)

  9. Experimental study of oil-water with paraffin precipitation in submarine pipelines; Estudo experimental do escoamento oleo-agua com precipitacao de parafinas em dutos submarinos

    Energy Technology Data Exchange (ETDEWEB)

    Bordalo, Sergio N.; Oliveira, Rafael de Castro [Universidade Estadual de Campinas (FEM/UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Engenharia de Petroleo], e-mail: bordalo@dep.fem.unicamp.br, e-mail: rafael@dep.fem.unicamp.br

    2006-07-01

    The deposition of paraffins in submarine pipelines poses a serious problem for the offshore petroleum production. Paraffins precipitate off oily solutions due to a temperature decrease according to the phase equilibrium conditions of the liquid-solid system. After some time, the continuous precipitation leads to deposits in the internal walls of the pipe, clogging the lines and promoting an increase in the head loss of the flow. Consequently, there is an increase in the pressure gradient required to maintain the flow, and the flow rate is reduced. A complete obstruction of the pipeline may occur. In the present work, this phenomenon was studied in a simulation of the subsea operational conditions, where the oil pipelines laying on the seabed are subjected to low temperatures, just a little above the freezing point of water. The pipeline behaves as a heat exchanger and the hot oil from the underground reservoir emerging from the wellhead is effectively cooled down to the point where paraffin precipitation occurs somewhere along the line. An experimental apparatus was built for a 25.4 mm (1 in) diameter pipe-flow model with 13 m of length, submerged in a chilling bath of near frozen water. Stream wise pressure and temperature gradients were measured, in order to evaluate the differences in the behavior of paraffin deposition between one-phase oil flow and two-phase oil-water flow. (author)

  10. Replacement of diesel oil by hydrous ethyl alcohol in direct burning: a comparison; Substituicao do oleo diesel por alcool etilico hidratado na queima direta: uma comparacao

    Energy Technology Data Exchange (ETDEWEB)

    Perez, Edgar Paz; Carvalho Junior, Joao Andrade de; Carrocci, Luiz Roberto [Universidade Estadual Paulista (FEG/UNESP), Guaratingueta, SP (Brazil). Fac. de Engenharia], Emails: edgarpaz@feg.unesp.br, joao@feg.unesp.br, carrocci@feg.unesp.br

    2006-07-01

    This article presents a study of the substitution of diesel fuel by ethyl alcohol in direct burning. The investigation is concentrated in the physical-chemical properties of the fuels, the combustion thermodynamics, the atomization, and the pollutants formation. Results show that hydrated ethyl alcohol can be an attractive alternative for diesel fuel, mainly by the benefits in the combustion process and the pollutants formation. Nevertheless, care must be taken in the substitution to prevent losses by evaporation, fire risks and material damage by corrosion. (author)

  11. Local content: worldwide trends and the Brazilian experience in the oil and gas sector; Conteudo local: tendencias mundiais e a experiencia brasileira no setor de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Pedrosa Junior, Oswaldo A.; Guimaraes, Paulo Buarque [Associacao Brasileira dos Produtores Independentes de Petroleo e Gas - ABPIP, Rio de Janeiro, RJ (Brazil); Fernandez y Fernandez, Eloi [Organizacao Nacional da Industria do Petroleo, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    In recent years a trend on increasing requirements for local investments has been observed worldwide in the petroleum industry. Host countries expect to have increasing social and economical benefits from the development of the oil and gas industry. This expectation drives at a more comprehensive concept of local content to include commitment with social, industrial, and technological development. The Brazilian experience has shown a lot of emphasis on local industry development. Initiatives from governmental authorities and the private sector have been implemented to increase the local industry participation in the oil and gas projects. The current regulation focus on the full and fair opportunities for the local suppliers and the local content commitment established in the E and P concession agreements. A key issue on promoting local content initiatives is to assure that the competitiveness of the indigenous industry will be developed and preserved. The constraints on building up the local industry competitiveness will be addressed, focusing on the taxation overburden, lack of adequate local financing, and internal structural aspects affecting industrial productivity. In addition to this, the experiences on measuring local content for offshore construction and drilling are highlighted. Technology development and technical capability have been addressed by incentive programs for the O and G sector. Finally, the technology learning process and the regulatory requirements to invest in R and D programs conducted by Brazilian technological institutions are discussed. (author)

  12. Modeling of development and projection of the accumulated recoverable oil volume: methodology and application; Modelagem da evolucao e projecao de volume de oleo recuperavel acumulado: metodologia e aplicacao

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Luciana Cavalcanti de; Ferreira Filho, Virgilio Jose Martins; Rocha, Vinicius Brito [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE)

    2004-07-01

    A relevant problem that petroleum companies deal is the estimate of the future levels of reserves The objective of the reserve forecasting is pursued through the construction of mathematical models. Considering that the exploration process is an informed and controlled process, in order to reach the exploration targets, the exploration process is lead inside of a sequence of decisions based on the reached results. Such decisions are taken surrounded by an uncertain environment added to the random nature of the process. Another important assumption that must be taken into consideration is the dependency of the exploration on the conditions, or structure, of the discovered resources and the final potential. The modeling starts with the establishment of a general problem, when the models are being constructed, based on suppositions associated to the main concepts, and ends with the attainment of specific solutions, when the best description, or model, is selected through the estimate of the respective parameters and of the measurement adjustments. The result of this approach reflects the essence of the exploration process and how it is reflected in the incorporation of reserves and history of field discoveries. A case study is used for validation of the models and the estimates. (author)

  13. Beyond the flavor: A green formulation of Ferula asafoetida oleo-gum-resin with fenugreek dietary fibre and its gut health potential

    Directory of Open Access Journals (Sweden)

    Liju Vijayasteltar

    Full Text Available Albeit the fact that asafotida is a popular kitchen spice and Indian folklore medicine for gut disorders, its consumption at physiologically relevant dosage is greatly challenged by the unpleasant flavor characteristics. Herein we report a green approach to derive stable powder formulations of asafoetida gum with minimized taste and odor suitable for dietary applications and gut health-related disorders. Employing a water based ultrasound mediated gel-phase dispersion of asafoetida gum on fenugreek derived soluble galactomannan fibre matrix. Microencapsulated particles (1 ± 0.3 μm of asafoetida was prepared as water dispersible free flowing powder (Asafin. Fourier-transform infrared spectroscopy (FTIR, scanning electron microscopy (SEM, accelerated stability and in vitro dissolution studies confirmed the stability, sustained release and microencapsulated structure of Asafin. Further investigations revealed significant (p < 0.01 reduction in acetic acid-induced writings and inhibition of ethanol-induced ulcer (94.1% in rats orally administered with Asafin at 250 mg kg−1 b.w. Asafin also exhibited anti-inflammatory effects (p < 0.01, in acute and chronic paw edema mice models. The safety of Asafin was further demonstrated by acute toxicity studies at 4 g kg−1  b.w. and by 28 days of sub-acute toxicity studies at 2.0 g kg−1 b.w. Keywords: Ferula asafoetida, Green formulation, Oral delivery, Gastroprotective, Ethanol-induced ulcer, Gut health

  14. 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)

  15. The displacement of oil polymer slug considering of adsorption effects; Deslocamento de oleo por banco de polimero considerando os efeitos de adsorcao

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Priscila M. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Pires, Adolfo P. [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil)

    2008-07-01

    Among different Enhanced Oil Recovery methods, the injection of chemical solutions plays an important role in mature fields additional recovery. The continuous injection of this kind of fluid would be very expensive, so, the injection of chemical slugs is an attractive alternative to improve the recovery of mature oil fields. Analytical models for 1-D displacement of oil by water with chemical compounds have been developed since the 1960's. This paper presents the 1-D analytical solution of the injection of a chemical slug followed by water drive into an oil reservoir. A flow potential associated with the conservation of water phase is introduced and used as a new independent variable instead of time. This technique permits splitting the system of equations into a thermodynamic system and one transport equation. Another important application of these solutions is the prediction of chemical flooding regardless of the transport properties (relative permeabilities and viscosities). (author)

  16. Stationary engine test of diesel cycle using diesel oil and biodiesel (B100); Ensaio de motores estacionarios do ciclo diesel utilizando oleo diesel e biodiesel (B100)

    Energy Technology Data Exchange (ETDEWEB)

    Torres, Ednildo Andrade [Universidade Federal da Bahia (DEQ/DEM/EP/UFBA), Salvador, BA (Brazil). Escola Politecnica. Dept. de Engenharia Quimica], Email: ednildo@ufba.br; Santos, Danilo Cardoso [Universidade Federal da Bahia (PPEQ/UFBA), Salvador, BA (Brazil). Programa de Pos-Graduacao em Engenharia Quimica; Souza, Daniel Vidigal D.; Peixoto, Leonardo Barbosa; Franca, Tiago [Universidade Federal da Bahia (DEM/UFBA), Salvador, BA (Brazil). Dept. de Engenharia Mecanica

    2006-07-01

    This work objectified to test an engine stationary of the cycle diesel, having as combustible diesel fossil and bio diesel. The characteristic curves of power, torque and emissions versus rotation of the engine was elaborated. The survey of these curves was carried through in the Laboratorio de Energia e Gas da Escola Politecnica da UFBA, which makes use of two stationary dynamometers and the one of chassis and necessary instrumentation for you analyze of the exhaustion gases. The tested engine was of the mark AGRALE, M-85 model stationary type, mono cylinder, with power NF (NBRISO 1585) Cv/kw/rpm 10/7,4/2500. The assays had been carried through in a hydraulically dynamometer mark Schenck, D-210 model. The fuel consumption was measured in a scale marks Filizola model BP-6, and too much ground handling equipment such as: water reservoir, tubings, valves controllers of volumetric outflow, sensors and measurers of rotation, torque, mass, connected to a system of acquisition of data on line. The emissions of the gases (CO, CO{sub 2}, and NOx), were measured by the analytical Tempest mark, model 100. The engine operated with oil diesel and bio diesel of oils and residual fats (OGR). In the tests, the use of the fuel derived from oil and the gotten ones from OGR was not detected significant differences how much. In this phase already it can show to the immediate possibility of the substitution of the oil diesel for bio diesel as combustible in the stationary engines of low power (author)

  17. Leak detection technologies for oil and gas pipelines; Tecnologias para deteccao e localizacao de vazamento em dutos de oleo e ou gas

    Energy Technology Data Exchange (ETDEWEB)

    Alonso, Julio R. [MTT Aselco Automacao Ltda., Sao Paulo, SP (Brazil)

    2005-07-01

    Two concepts are available for leak detection in oil and/or gas pipelines: On-line leak detection system and off-line leak detection technique. The off-line leak detection technique is, usually, portable and does net configure a 'system'. This technique includes hydro-test, acoustic emission of high frequency, tracer of chemical substances, ultrasonic flow meter (UT), thermographic infra-red mapping, electromagnetic offset registration, etc. Since most of those methods requests stop of the system or depend on direct and detailed inspection of the whole monitored piping they are limited to the off-line inspection. In the current days there are only two technologies applied to detect and locate leaks on-line: The acoustic Leak Detection System and the modeling of computerized simulation also called as RTM (Real Time Modeling), RTTM or Mass Balance. There are still other techniques in the market, as acoustic emission, pressure analysis (PPA) beyond other rough techniques, without good results. Even some of these techniques are working without success, they are still used to accomplish with government standards. (author)

  18. Optimization of organo clay production for applications in based oil drilling fluid; Otimizacao do processo de organofilizacao para aplicacoes em fluidos de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Heber S; Martins, Alice B; Costa, Danubia L. da; Ferreira, Heber C; Neves, Gelmires de A; Melo, Tomas J.A. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Teixeira Neto, Erico [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)

    2008-07-01

    The organophilic clays are widely used as an agent dispersed in the composition of oil based drilling fluids. The organophilic clays are gotten from bentonite clays treated, in watery way, with ionic surfactants, that are adsorbed in the surface of interlayer of the clays, re-covered them with a organic layer. A fundamental stage of production of the organophilic clays is the dispersion of bentonite clays, in way that variables like: speed of agitation, temperature and time of cure, influences directly in plastic and apparent viscosities of these dispersions, together with other variables of organophilization process, like, temperature and time of cure of organophilization, has direct influence in efficiency of the organophilization process. This work considers a study of these variable, using bentonite clays: Brasgel PA{sup R} and Cloisite Na{sup +R}, treated with the ionic surfactant Praepagem WB{sup R}. The organophilic clays gotten had been characterized by rays X diffraction, Foster's swelling, and the results were compared with the commercial organophilic clay VG-69{sup R}, industrially treated with ionic surfactant. Viscosities plastic and apparent of the dispersions had been measured in the midst of organic dispersant diesel oil used to obtain the oil based drilling fluids. Preliminary results of Foster's swelling and preparation of fluids show that the clays have affinity with the means liquid organic dispersants, and the fluids meet specifications of PETROBRAS (N-22581-1997 and N-2259 to 1997) for use in the of diesel oil based drilling fluids. (author)

  19. The influence of the remedy with diesel oil in impacted environment; A influencia da remediacao em ambiente impactado com oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Bento, Douglas M.; Baisch, Paulo; Machado, Maria I.; Costa, Jorge A.V.; Martins, Vilasia [Fundacao Universidade Federal do Rio Grande (FURG), RS (Brazil)

    2004-07-01

    The conventional techniques of cleaning can be complemented with the remediation, for the use of chemical surfactant or of bio surfactant. The bioremediation minimizes the impact of recalcitrant substances in the atmosphere. The chemical surfactant can promote the fastest biodegradation of the oil, but its application should always be evaluated by professionals specialized in environment, since she can be seen as a deliberated introduction of a pollutant. The present work evaluated the influence of the use of a chemical surfactant and of a of bio surfactant (produced by the fungus Aspergillus fumigatus), in controlled spill of oil diesel, happened in at spring/2003 in the Island of the Horses located in the estuary of the Patos Lagoon. The atmosphere was monitored for 6 months, being selected a place with oil diesel, another with oil diesel and chemical surfactant and another with oil diesel and of bio surfactant. The following chemical parameters were analyzed: organic carbon, nitrogen and total match of the sediment. The statistical treatment consisted of the variance analysis (ANOVA) and in the test of Tukey (p <0,01), for the analyzed nutrients. The coming hydrocarbons of the degradation of the oil diesel will be later on certain for GC-MS. The results showed that the best environmental conditions were verified where the remediation was used. (author)

  20. Performance of diesel engine fuelled with sunflower biodiesel blends; Desempenho de motor diesel com misturas de biodiesel de oleo de girassol

    Energy Technology Data Exchange (ETDEWEB)

    Correa, Ila Maria; Maziero, Jose Valdemar Gonzalez; Bernardi, Jose Augusto; Storino, Moises [Instituto Agronomico de Campinas (CEA/IAC), SP (Brazil). Centro de Engenharia e Automacao; Ungaro, Maria Regina [Instituto Agronomico de Campinas (IAC), SP (Brazil). Centro de Graos e Fibras

    2006-07-01

    The aim of this paper was to evaluate the use of sunflower bio diesel blends in a CI engine, direct injection. The test procedure was done in a dynamometer bench had been determined the performance of engine through power take-off (PTO) with use of diesel and sunflower bio diesel blends (B5, B10, B20 and B100). The lubricating oil was analyzed before and after period of 96 hours. The results were: D (40,7 kw; 271 g/kw.h); B5 (40,3 kw; 271 g/kw.h); B10 (39,8 kw; 277 g/kw.h); B20 (40,0 kw; 277 g/kw.h) e B100 (39,8 kw; 291 g/kw.h). It was conclude that the use of blends B5, B10, B20 and B100 decreased the power of PTO max. 2,2% and increased the fuel consumption max. 7, 3%. The analyze of lubricating oil showed that the viscosity, water content and level of iron were the parameters more affected, although it had been acceptable. (author)

  1. Monitoring of NORM in the offshore production of oil and gas; Monitoramento de NORM na producao offshore de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Jesus, Joao Mario Fernandes de, E-mail: jmfjesus@petrobras.com.br [Petroleo Brasileiro S. A. (UO-ES/PETROBRAS), Vitoria, ES (Brazil). Unidade de Operacoes de Exploracao e Producao do Espirito Santo

    2013-07-01

    This paper evaluates the levels of radioactivity (dose rates of gamma radiation) in the elements of the production unit FPSO (floating production, storage and offloading) process that show the presence of fouling and / or radioactive waste and its evolution over time, comparing with previous reviews. The radioactivity is detected due to the presence of NORM - Naturally Occurring Radioactive Material, consisting predominantly of BaSO4, containing radio, radioactive natural element, which presents itself as the Ra-226 and Ra-228 isotopes. The detection of radioactivity in equipment/piping indicates the presence of scaling and/or sludge containing naturally radioactive material (NORM), but the absence of radioactivity does not exclude the presence of scale or sludge, as this may consist of non-radioactive material, as CaCO3. Gamma radiation has the property to pass through the construction element (steel) of the lines and equipment, allowing detection of radioactive material within them without the need of opening. This monitoring was implemented due to the history of radioactive inlays in the Espirito Santo basin. These data contribute to decision-making on strategy of dosage of anti-fouling applied in the production system, enable the classification of areas according to the norm CNEN-NN-3.01, as well as guide to the occupational safety and hygiene procedures during interventions (openings, entrances and cleaning) on the elements of process.

  2. Selection of surfactants for using in invert emulsion based on vegetable oil; Selecao de surfactantes para uso em emulsoes inversas a base de oleo vegetal

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Giliane V.; Lacerda, Vanessa M.; Garcia, Rosangela B.; Costa, Marta [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Lab. de Pesquisa em Petroleo (LAPET); Girao, Joaquim Helder S. [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    The purpose of this study was to investigate the superficial properties of a vegetable oil of degree nutritious front the several biodegradable surfactants, seeking to stabilize emulsions of the type water-in-oil, presents in formulations of fluids of perforation of oleofilic base. Mentioned them fluids they are suitable to the perforation of located oil wells in leases of high environmental sensibility and with inferior temperature to 250 deg F. The use of a fluid of that nature can make possible the discard of the solids perforated directly in the sea, sparing the application of previous treatments, or the transport of the same ones for dike-mother, operations that you/they can elevate the total cost of the perforation. The values of the superficial tension and of the concentration critical micellar, they were measured in the solutions oil vegetal/tensoactive, through the method of the ring (DuNouy), using a tensiometer DCA 315 (Thermo Cahn). The effects of the variation of the concentration and of the temperature in the superficial properties of the oil were certain. (author)

  3. Combustion oil production by direct liquefaction of the black liquor; Obtencao de oleo combustivel atraves da liquefacao direta de lixivia negra

    Energy Technology Data Exchange (ETDEWEB)

    Costa, J L.M. [Universidade Estadual de Maringa, PR (Brazil). Dept. de Quimica; Rodrigues, J A.R.; Schuchardt, U [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica

    1985-12-31

    A large number of publications about the liquefaction of carbonaceous materials with carbon monoxide in water have appeared. As carbon monoxide reacts with water to form formate. We have decided to use this compound for the direct liquefaction of black liquor, obtained from the pulp and paper industry. The reactions were performed in a stainless steel autoclave of 1 litre using a ratio of water/black liquor/sodium formate of 69/29,5/1,5 %. The reaction conditions were varied between 200 and 300 deg C and 110 to 130 bar of inert gas. We obtained heavy oils of an average molecular weight around 500 in 90 to 100 % yield on a dry and ash-free basis. The calorific value of this oil was estimated in 38000 kJ/kg. (author). 12 refs., 2 figs., 7 tabs

  4. Analysis of nitrogen injection as alternative fluid to steam in heavy oil reservoir; Analise da injecao de nitrogenio como fluido alternativo ao vapor em reservatorio de oleo pesado

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Marcos Allyson Felipe; Galvao, Edney Rafael Viana Pinheiro; Barillas, Jennys Lourdes; Mata, Wilson da; Dutra Junior, Tarcilio Viana [Universidade Federal do Rio Grande do Norte (UFRN), RN (Brazil)

    2012-07-01

    Many of hydrocarbon reserves existing in the world are formed by heavy oils (deg API between 10 and 20). Moreover, several heavy oil fields are mature and, thus, offer great challenges for oil industry. Among the thermal methods used to recover these resources, steam flooding has been the main economically viable alternative. Latent heat carried by steam heats the reservoir, reducing oil viscosity and facilitating the production. This method has many variations and has been studied both theoretically and experimentally (in pilot projects and in full field applications). In order to increase oil recovery and reduce steam injection costs, the injection of alternative fluid has been used on three main ways: alternately, co-injected with steam and after steam injection interruption. The main objective of these injection systems is to reduce the amount of heat supplied to the reservoir, using cheaper fluids and maintaining the same oil production levels. In this paper, the use of N{sub 2} as an alternative fluid to the steam was investigated. The analyzed parameters were oil recoveries and net cumulative oil productions. The reservoir simulation model corresponds to an oil reservoir of 100 m x 100 m x 28 m size, on a Cartesian coordinates system (x, y and z directions). It is a semi synthetic model with some reservoir data similar to those found in Potiguar Basin, Brazil. All studied cases were done using the simulator STARS from CMG (Computer Modelling Group, version 2009.10). It was found that N{sub 2} injection after steam injection interruption achieved the highest net cumulative oil compared to others injection system. Moreover, it was observed that N2 as alternative fluid to steam did not present increase on oil recovery. (author)

  5. Energetic analysis of experimental process in bio diesel production from chicken oil; Analise energetica do proceso experimental de producao de biodiesel a partir de oleo de frango

    Energy Technology Data Exchange (ETDEWEB)

    Bonometo, Ricardo Pacheco [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-Graduacao em Energia na Agricultura], E-mail: rpbonometo@yahoo.com.br; Justi, Andre Luiz [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-Graduacao em Irrigacao e Drenagem], E-mail: aljusti@fca.unesp.br; Buchi, Alisson Teixeira [Universidade Estadual Paulista (CEVAP/UNESP), Botucatu, SP (Brazil). Centro de Estudos de Venenos e Animais Peconhentos], E-mail: atbuchi@yahoo.com.br; Saglietti, Jose Roberto [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Fisica e Biofisica], E-mail: jroberto@ibb.unesp.br

    2010-07-01

    There is a great global concern about the depletion and the high cost of fossil fuel reserves exploitation, more than ever, it is necessary to make a profound study and take advantage of alternative sources that can be used as energy efficiency with an appropriate pricing and low environmental impact. Brazil, which has highlighted using alternative energy sources as the use of ethanol and, in recent years, has been encouraging the expansion of its energy matrix in which the biodiesel will have a strategic importance within the agrobusiness area. Biodiesel is a fuel that can replace the diesel, which is a petroleum derivative. It is an ester, produced in the transesterification reaction of vegetable oils and animal greases, in an alcohol with an additional catalyst, are converted into fatty acids and result in esters with glycerol as sub products. The objective of this study was to estimate the final energy balance for the process biodiesel production from oil chicken waste. The energy balance estimation was quantified in calorific value according to the energy expenditure by calorimetric bomb method. The relationship between input and output of energy was around 0.97. In a first evaluation, the procedures adopted should be improved enough, so the process can become energetic and economically viable. (author)

  6. Calorific value for compositions with biodiesel of fat chicken and diesel oil; Valor calorifico para composicoes com biodiesel da gordura de frango e oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcelo Jose da [Universidade de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola], email: marcelo.jose@feagri.unicamp.br; Souza, Samuel N.M. de; Souza, Abel A. de; Martins, Gislaine I. [Universidade Estadual do Oeste do Parana (CCET/UNIOESTE), Cascavel, PR (Brazil). Centro de Ciencias Exatas e Tecnologicas], emails: ssouza@unioeste.br, abel.sza@hotmail.com, iastiaque@yahoo.com.br

    2011-07-01

    The biodiesel fuel is a renewable source of alternative fuel used in diesel cycle engines. The production of biodiesel involves the reaction of methanol with fatty acids of animal or vegetable. The production of biodiesel from chicken fat can be very attractive for some regions from Brazil with high poultry production, as in the Parana West and Santa Catarina West. In this study , the goal was the lower calorific value of the compositions between biodiesel and diesel oil: 100% Diesel oil (B0), 20% biodiesel (B20), 40% biodiesel (B40), 60% biodiesel (B60), 80% biodiesel (B80 ), 100% biodiesel (B100). The biodiesel used was acquired in the Centre for Development and Diffusion of technologies on the Assis Gurgacz College, in Cascavel city. The nominal production capacity of the unit is 900 liters on period of 8 hours. The model of the calorimeter used, was the E2K. The lower calorific value of B100 composition was 35.388 MJ kg-1 and the diesel oil was 41.299 MJ kg-1. With the measuring of the caloric value of six samples mix of diesel oil and biodiesel, was obtained a linear function decrease of the calorific value when increased it the proportion of biodiesel from chicken fat into fuel. (author)

  7. Catalyst systems in the production of biodiesel from residual oil; Sistemas cataliticos na producao de biodiesel por meio de oleo residual

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Carlos Alexandre de [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)

    2006-07-01

    The vegetable oils and fat animals appear like an alternative for substitution the diesel oil in ignition engines for compression. Submitting the oil on transesterification reaction, we obtain a fuel with same characteristics as diesel, called biodiesel. Generally, 85 per cent of biodiesel cost is from the oil production. Through transesterification vegetable oil can be transformed in a mixture of esters of fatty acids. The residual oil from frying has been used as a possibility of raw materials of biodiesel, due to its easy acquisition and the viability of not being discarded as waste. (author)

  8. Development of a extensor oil with low content of polycyclic aromatic; Desenvolvimento de oleo extensor com baixo teor de policiclicos aromaticos

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Anie Daniela M.; Fontes, Anita Eleonora F.; Figueiredo, Joao Baptista [PETROBRAS, Rio de Janeiro, RJ (Brazil)] (and others)

    2008-07-01

    This paper presents the development of a substitute product for the aromatic oil used in rubber tires. The new oil must be in according to The European Community Directive 2005/69/EC, which has the start date in January first of 2010. The directive sets limits for specific levels of polyaromatics content in the oils for rubber tires because of the mutagenic and harmful to the reproduction characteristic of some of these substances. The process of aromatics extraction was conducted on several kinds of feedstocks to obtain a product with kinematic viscosity at 100 deg C in the 40-50 cSt range and polycyclics aromatics content until 3% in mass. It is important to know that the current oils have 20% in mass of polyaromatics content. The product developed is in according with the Directive specifications and contributes to the production of tires more suitable to the environment and human health. (author)

  9. Modelagem e simulação de reator de leito expandido aplicado ao hidroprocessamento de oleos pesados e residuos de destilação

    OpenAIRE

    João Capistrano Nobre de Abreu

    1995-01-01

    Resumo: O presente trabalho apresenta a modelagem e simulação de um reator de leito fluidizado trifásico aplicado ao hidroprocessamento de óleos pesados e resíduos de destilação. Duas reações principais foram consideradas no desenvolvimento do modelo, o hidrocraqueamento e a hidrodemetalização tendo sido a primeira considerada como exclusivamente térmica e a segunda como catalítica. O grau de mistura do reator foi representado de duas maneiras distintas. Inicialmente, considerou-se o sistem...

  10. Physical-chemistry characterization of oil and biodiesel from Crambe abyssinica Hochst; Caracterizacao fisico-quimica do oleo e do biodiesel de DE Crambe abyssinica Hochst

    Energy Technology Data Exchange (ETDEWEB)

    Jasper, Samir Paulo; Biaggioni, Marco Antonio Martin; Silva, Paulo Roberto Arbex; Seki, Andre Satoshi; Saath, Reni [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas], E-mail: jasper@fca.unesp.br

    2010-07-01

    Currently, the production of biodiesel in the world is growing so rapidly, this interest and demand for biodiesel promote an increase in demand for raw materials, or lipids. Biodiesel is a substitute for diesel oil obtained by transesterification, acid or base, of the lipids present in oils and fats. The Crambe abyssinica Hochst is species plant that has attracted interest of Brazilian producers due to oil content, rusticity and mechanized cultivation, mainly as a crop of winter it becomes an option for most farmers in this period. This study aimed to characterize physical-chemical oil and biodiesel from Crambe abyssinica Hochst, in accordance with Resolution n. 42 of the ANP. The analysis of fatty acids of oil crambe showed high concentration of unsaturated fatty acids, which may not be suitable for the use of biodiesel in very cold regions, where it is used pure or in mixtures with diesel in large proportions. The biodiesel produced from Crambe abyssinica Hochst be revealed within the standards established by the National Agency of Petroleum, Natural Gas and Biofuels. (author)

  11. Chemical constituents of Capraria biflora (Scrophulariaceae) and larvicidal activity of essential oil; Constituintes quimicos de Capraria biflora (Scrophulariaceae) e atividade larvicida de seu oleo essencial

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Luciana Gregorio da S.; Almeida, Macia Cleane S.; Monte, Francisco Jose Q.; Santiago, Gilvandete Maria P.; Braz-Filho, Raimundo; Lemos, Telma Leda G. [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Quimica Organica e Inorganica; Gomes, Clerton L.; Nascimento, Ronaldo F. do, [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Quimica Analitica e Fisico-Quimica

    2012-07-01

    . Analysis of essential oil from fresh leaves of Capraria biflora allowed identification of fourteen essential oil constituents among which thirteen are sesquiterpene compounds, and {alpha}-humulene (43.0%) the major constituent. The essential oil was tested for larvicidal activity against Aedes aegypyti showing good activity, with LC{sub 50} 73.39 {mu}g/mL (2.27 g/mL). Chromatographic studies of extracts from roots and stems allowed the isolation of five compounds: naphthoquinone biflorin, sesquiterpene caprariolide B, the steroid {beta}-sitosterol, the carbohydrate D-mannitol and iridoid myopochlorin first reported in the species C. biflora. The structures of compounds were characterized by spectroscopic data, IR, MS, NMR{sup 13}C, NMR{sup 1}H, NOE, HSQC and HMBC. (author)

  12. Numerical modeling of oil spill in the Patos Lagoon estuary; Modelagem numerica de derrames de oleo no estuario da Lagoa dos Patos

    Energy Technology Data Exchange (ETDEWEB)

    Martinho, Vivian; Monteiro, Igor Oliveira; Janeiro, Joao; Fernandes, Elisa Helena Leao [Fundacao Universidade do Rio Grande (FURG), RS (Brazil)

    2008-07-01

    Navigation is responsible for the input of 555.000 tons of oil per year in the marine environment. The recovery of the system can take dozens of years, affecting economical, ecological and social areas. The Patos Lagoon estuary presents wide importance and high susceptibility to accidents of oil spill. Therefore, the objective of this study is to analyze the spread of oil spills using the MOHID model, which simulates both the hydrodynamics of the estuary and the oil dispersion considering the different processes involved. Wind and water level data from May 1 to August 18, 1999 were used to simulate a hypothetic accident of involving 2000 m3 of oil MF 380 during the passage of a cold front considering high and low river discharges. Results indicate that the oil dispersion is governed by the estuarine dynamic, which is controlled by the wind action and river discharge. Thus, during southwest wind the oil is retained within the estuary, and in situations of northeast wind the oil tends to leave the estuary and sometimes can reach the inner shallow bays. (author)

  13. Development of heavy oil fields onshore and offshore: resemblances and challenges; Desenvolvimento de campos de oleos pesados em terra e em mar: semelhancas e desafios

    Energy Technology Data Exchange (ETDEWEB)

    Branco, Celso Cesar Moreira; Moczydlower, Priscila [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    The so called offshore heavy oils (API gravity lower than 19) and extra heavy oils (API lower than 10) are receiving increasing importance due to the light oil production decline and also to exploration difficulties. In countries like Canada, Venezuela, China and the US (California) there are immense onshore heavy oil resources sometimes classified as non conventional. Differently in Brazil, onshore heavy oil volumes are modest being important those located in offshore fields (although non comparable to the Canadian and Venezuelan ones). The issue raised in this paper is: the field location, whether onshore or offshore, is always the main constraint in the development process? Well, the question has both a 'yes' and 'no' as an answer. There are important differences but some similarities in the technologies that can be applied. In this text the authors intend to explore this point while at the same time depicting some of the main related aspects under research for proper exploitation of heavy and extra heavy oil assets. The most relevant difference between onshore and offshore heavy oil fields is the application of thermal methods for improved recovery: while worldwide spread and commercially applied to onshore fields, steam injection is not yet viable for offshore operations. The only option for improving recovery in offshore fields is water injection, which has the drawback of producing large volumes of water during the field life. Another aspect is the cost of the production wells: much cheaper onshore they allow well spacing in the order of 100 m or even 50 m whereas in offshore well spacing are in the 1000 m range. From the flow assurance point of view, inland installations can take use of solvents for heavy oil dilution, such as diesel or naphtha. Offshore this option is complicated by the long distances from the wellheads to the producing facilities in the platform, in the case of wet completions. There are also differences regarding the pumping of the oil, since offshore conditions usually consist of higher rates and pressures than onshore operations. But if there are differences, there are similarities as well: heavy oil reservoirs are usually shallow (up to 1000 m depth) and have high permeability. In both onshore and offshore fields, sandstones reservoirs are normally unconsolidated, which leads to sand production problems and geo-mechanic instabilities in many cases. This is the context of this paper. It begins with a definition of what is meant by 'heavy oil' onshore and offshore. Next some common reservoir characteristics are described. Recovery methods are compared for each case. Some aspects of well completion, pumping, flow assurance and processing are also cited. The paper is concluded by highlighting the differences that still exists for these two environments - onshore and offshore heavy oil operations - and stating that onshore fields can be used as laboratories for testing new technologies that could be used for offshore field in the (near) future. (author)

  14. Determination of mechanical damage from wells under oil and gas flow condition; Determinacao de dano mecanico em pocos sob condicao de escoamento de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Marques, J. B.D. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Trevisan, O. V. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)

    2008-07-01

    The well bore effect is one of the most difficult variables obtained from well test analysis under two-phase condition. The presence of the gas in a well inserted in reservoir, which operates under gas drive solution, hinders the development of the analytical model to determine the mechanical damage. It is one of the reasons of the using the single phase well test analysis methodologies become suitable to the multiphase cases. The determination of the well bore effect is justified; therefore it is possible to work over in the well in order to determinate the real potential productive. The main objective of this work is to reevaluate a method of determination of the mechanical damage gotten from a well test under two-phase condition. In this work a simplified model of reservoir simulation is constructed in a commercial simulator in order to validate the methodology. The refinement of the blocks near to the well adopted in the simulation is a good representation of the well mechanical damage which occurs in a homogeneous reservoir. The types of well test analysis used in this work are two: drawdown and buildup test. The results gotten for this methodology, as will be shown, are excellent quality and the model of simulation presented here can be used for other analytical methods studies in order to determinate the mechanical damage or other variable of the reservoir. (author)

  15. Challenges for the heavy oil exportation though pipelines in deep waters; Desafios da exportacao de oleos pesados atraves de oleodutos em aguas profundas

    Energy Technology Data Exchange (ETDEWEB)

    Andreolli, Ivanilto; Borges Filho, Jonas P.; Gaspari, Eduardo F. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Due to the high pressures, low temperatures, and high viscosities involved, the heavy oil exportation in deep waters through pipelines imposes a number of challenges to be feasible. The viscosities involved in such scenarios are usually very high, which brings most of the system to a laminar flow even for the higher flow rates. In a laminar flow the viscosity is linearly and directly related to the frictional pressure drop and so its precise determination is crucial for the correct results from simulations in transient or in steady state, including the modeling thermal. This work presents some results in steady state and transient simulations of heavy oil of deg API around 16 and pipe length of approximately 20km. For the analyses in the steady state was concluded that in low outflows the required pressures can surpass the pressures in high outflows. In the transient regimen was concluded that in case of long stop, the return to the full outflow surpasses 6 days and the replacement of the fluids from the pipe by diesel is a solution to reduce significantly this time. (author)

  16. Evaluation of glycerol derivative as emulsifier for oil based drilling fluids; Avaliacao de derivados de glicerina como emulsificante para fluidos de perfuracao de base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Susan A. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil). Escola de Quimica; Cavalcanti, Milena Y.; Rodrigues Junior, Jorge; Lachter, Elizabeth R.; Nascimento, Regina Sandra V. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil). Inst. de Quimica

    2008-07-01

    In view of the growing search for new applications for the surplus glycerine of biodiesel production, the use of a glycerine derivative as emulsifier in oil based muds is proposed in this work. Glycerine monooleate was synthesized through esterification reaction, and characterized by NMR{sup 13}C. Its applicability as emulsifier was verified through electric stability tests performed on inverted phase drilling fluids. The obtained results were compared with two formulations containing different emulsifiers (sorbitol monooleate and trimethylolpropane monooleate). It was also evaluated the rheological properties of the formulated fluids through standard tests. It was verified that the fluid that contained the glycerine derivative showed considerably better electric stability results than the other systems. It also presented rheological properties similar to the ones shown by the system that contained the commercial emulsifier (sorbitol monooleate). Thus, it was found that glycerine monooleate is a potential substitute to the currently emulsifiers (author)

  17. Obtaining biodiesel from oils mixtures of corn and cotton; Obtencao de biodiesel a partir da mistura dos oleos de milho e algodao

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Lionete Nunes de; Santos, Jose Carlos Oliveira; Carvalho, Maria Wilma Nunes Cordeiro [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Dantas, Manoel Barbosa; Rosenhaim, Raul; Sousa, Antonio Gouveia [Universidade Federal da Paraiba (UFPB), Joao Pessoa, PB (Brazil)

    2008-07-01

    Most of the world energy consumption derives from oil, coal and natural gas. The shortage of the energy sources, especially the energy from fossil fuels, and moreover the impossibility of its renovation has motivated the development of technologies that allow for the usage of renewable energy sources. Biodiesel is biodegradable, renewable and it obeys the cycle of carbon. It is defined as a blend of mono-alkyl esters of fatty acids derived from renewable sources, as vegetable oils and animal fats. It is obtained by means of a transesterification process, in which the transformation of triglycerides into smaller molecules of fatty acid esters takes place, and it displays physical and chemical characteristics similar to the ones of a fossil fuel-derived diesel oil. This work presents the attainment of biodiesel from the mixture of oils of corn and cotton, utilizing the homogeneous potassium hydroxide catalyst (KOH). The biodiesel was characterized on the basis of physico-chemical properties, of infrared spectroscopy (IR), gas chromatography-mass spectrometry (GC/MS) and thermogravimetry (TG). In thermogravimetric analyses, it was observed that the biodiesel presented an initial decomposition temperature of lower than that of oil, demonstrating be more volatile and bringing up the diesel. (author)

  18. Optimization of organo clay production for applications in based oil drilling fluid; Otimizacao do processo de organofilizacao para aplicacoes em fluidos de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Heber S.; Martins, Alice B.; Costa, Danubia L. da; Ferreira, Heber C.; Neves, Gelmires de A.; Melo, Tomas J.A. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Teixeira Neto, Erico [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)

    2008-07-01

    The organophilic clays are widely used as an agent dispersed in the composition of oil based drilling fluids. The organophilic clays are gotten from bentonite clays treated, in watery way, with ionic surfactants, that are adsorbed in the surface of interlayer of the clays, re-covered them with a organic layer. A fundamental stage of production of the organophilic clays is the dispersion of bentonite clays, in way that variables like: speed of agitation, temperature and time of cure, influences directly in plastic and apparent viscosities of these dispersions, together with other variables of organophilization process, like, temperature and time of cure of organophilization, has direct influence in efficiency of the organophilization process. This work considers a study of these variable, using bentonite clays: Brasgel PA{sup R} and Cloisite Na{sup +R}, treated with the ionic surfactant Praepagem WB{sup R}. The organophilic clays gotten had been characterized by rays X diffraction, Foster's swelling, and the results were compared with the commercial organophilic clay VG-69{sup R}, industrially treated with ionic surfactant. Viscosities plastic and apparent of the dispersions had been measured in the midst of organic dispersant diesel oil used to obtain the oil based drilling fluids. Preliminary results of Foster's swelling and preparation of fluids show that the clays have affinity with the means liquid organic dispersants, and the fluids meet specifications of PETROBRAS (N-22581-1997 and N-2259 to 1997) for use in the of diesel oil based drilling fluids. (author)

  19. Heavy and viscous oil evaluation in a deep water environment: an integrated evaluation process; Avaliacao de oleo pesado e viscoso em aguas profundas: um processo integrado de avaliacao

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, Wesley S.; Armacanqui, Gina [Schlumberger, Rio de Janeiro, RJ (United States)

    2004-07-01

    There are many challenges related to heavy and viscous oil reserves evaluation. When this includes a deep-water offshore environment the challenges, including safety issues, increase in complexity. In this paper we share some experiences obtained during the preparation and execution of heavy oil evaluation activities. The process uses the petrophysical and fluid characterization preliminary results obtained during the logging phase as well as prior information from correlation field/wells in order to design the appropriate ESP configuration and location in the DST string as well as the sampler location which should allow monophasic sampling. During the operation a real time interpretation is performed validating the data obtained and sensitizing parameters such as pump frequency, bubble point pressure, GOR and viscosities, allowing the diagnostic of the operation and consequent appropriated flow conditions in order to provide a optimum picture supporting decisions regarding sampling time and other specific evaluation objectives. The examples presented illustrate the methodology proposed of integrated evaluation applied to heavy oil and its benefits. (author)

  20. Study of the fluid dynamic and the efficiency of displacement in oil-water systems; Estudo da fluidodinamica e da eficiencia de deslocamento em sistemas agua-oleo

    Energy Technology Data Exchange (ETDEWEB)

    Fiorese, Eliana K.; Quadri, Marintho B.; Machado, Ricardo A.F.; Nogueira, Andre L.; Lopes, Toni J. [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Quimica e de Alimentos; Baptista, Renan M. [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    Several operations and procedures in the oil industry are related to immiscible displacement of a fluid by another one. Some examples can be listed: the natural and artificial oil elevation from wells, the pumping of high viscosity oils through pipelines using water injection and secondary oil recovery. The performance of the last one is a direct consequence of the interfacial phenomena inherent to oil/water systems. As occur in oil leakages from submarine pipelines, the phase inversion phenomenon can also be considered in this context. Therefore, it is of major importance to realize experimental analysis of the oil/water interface stability and the facts that leads to the fingering phenomenon appearance. This phenomenon is represented into the other one like one or more fingers. The mathematical model used to describe the immiscible displacement of another one is initially developed to Hele-Shaw cells. Experimental observations with a Hele-Shaw cell enable the evaluation of the proposed model and its capability to adequately describe the viscous fingering phenomenon related to physical (density, viscosity and interfacial tension) and geometric properties of the system. (author)

  1. Sorption of diesel oil from polyurethane composite reinforced with palm fiber; Sorcao de oleo diesel a partir de composito de poluretano reforcado com fibras da palmeira

    Energy Technology Data Exchange (ETDEWEB)

    Dantas, I.R.; Cipriano, J.P.; Costa, I.L.M.; Mulinari, D.R., E-mail: dmulinari@hotmail.com [Universidade do Estado do Rio de janeiro (FAT/UERJ), Resende, RJ (Brazil). Faculdade de Tecnologia

    2016-07-01

    One of the methods to contain the diesel oil spill is the application of materials polymeric sorbents and the polyurethane is an option of porous sorbents. In this way, the objective of this study was to evaluate the use of polyurethane composites derivative of castor oil reinforced with palm fibers to sorption of diesel oil and compare with pure polyurethane. The composites were reinforced with 5 to 20% w/w of fibers. Subsequently, the sorption capacity of the composite in function of inserted fiber content in the matrix was analyzed. The physical and morphological characteristics were evaluated by scanning electron microscopy techniques (SEM) and diffraction X-ray (XRD) and the contact angle. The results showed that the composite with 20% w /w showed higher sorption capacity oil diesel compared to pure PU and other composites this fact was due to the heterogeneity of the pores and dispersion of fiber in the matrix. (author)

  2. Evaluation of Cytotoxicity Effects of Oleo-Gum-Resin and Its Essential Oil of Ferula assa-foetida and Ferulic Acid on 4T1 Breast Cancer Cells.

    Science.gov (United States)

    Bagheri, Seyyed Majid; Asl, Amir Abdian; Shams, Ali; Mirghanizadeh-Bafghi, Seyyed Ali; Hafizibarjin, Zeynab

    2017-01-01

    Cancer causes significant morbidity and mortality and is a major public health problem worldwide. Breast cancer is a leading cause of cancer-associated mortality in women, and the incidence is also on the rise in the entire world. Medicinal plants have been an important source of several clinically useful anticancer agents. In this study, we studied the growth inhibitory effect of asafoetida and its essential oil and ferulic acid on antitumor activity using mouse breast cancer cell line. For this aim, cells were exposed to these components at different concentrations and for different time durations. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was carried out to characterize the cytotoxicity of the constituents used. Our results showed that all three constituents could inhibit 4T1 cell proliferation. Our MTT assay results showed a significant cytotoxicity effect in a time- and concentration-dependent manner. It also demonstrated that essential oil of asafoetida has a stronger effect in decreasing viability breast cancer cells. Ferulic acid showed a significant effect only at a dose of 500 μg/ml. Based on the results of cellular carried out in this study, we could demonstrate that asafoetida and its essential oil and ferulic acid have inhibitory effect on the growth of breast cancer cell line. As evidenced from these preliminary results, asafoetida and its derivative constituents may be considered as attractive alternatives to serve as lead compounds in drug development for breast cancer as an adjuvant therapy. However, much remains to be done before such agent could be introduced to the clinic.

  3. Orange oil/water nanoemulsions prepared by high pressure homogenizer; Nanoemulsoes oleo de laranja/agua preparadas em homogeneizador de alta pressao

    Energy Technology Data Exchange (ETDEWEB)

    Kourniatis, Loretta R.; Spinelli, Luciana S.; Mansur, Claudia R.E. [Universidade Federal do Rio de Janeiro (IMA/UFRJ), RJ (Brazil). Inst. de Macromoleculas Professora Eloisa Mano; Gonzalez, Gaspar [Centro de Pesquisas e Desenvolvimento Leopoldo Americo Miguez de Mello (CENPES/PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2010-07-01

    The objective of this work was to use the high-pressure homogenizer (HPH) to prepare stable oil/water nanoemulsions presenting narrow particle size distribution. The dispersions were prepared using nonionic surfactants based on ethoxylated ether. The size and distribution of the droplets formed, along with their stability, were determined in a Zetasizer Nano ZS particle size analyzer. The stability and the droplet size distribution in these systems do not present the significant differences with the increase of the processing pressure in the HPH). The processing time can promote the biggest dispersion in the size of particles, thus reducing its stability. (author)

  4. Biodegradation evaluation of recycled polyethylene doped with Moringa oleifera oil; Avaliacao da biodegradacao de filmes de polietileno reciclado dopados com oleo de Moringa oleifera

    Energy Technology Data Exchange (ETDEWEB)

    Bicalho, Luciana A.; Novack, Katia M.; Melo, Tania M.S., E-mail: knovack@iceb.ufop.br [Dept. de Quimica (DEQUI) - Universidade Federal de Ouro Preto (UFOP), Ouro Preto, MG (Brazil)

    2011-07-01

    Chemical modifications and use of additives are some of the mainly ways to obtain polymer materials with especial properties. Vegetable oils incorporated to polymers preserve their structure while make possible a reduction of degradation rate. This work proposed the use of polyethylene, one of the most common polymer commodities, because of its low cost and wide application. In this project it was verified the possibility of making polymer materials with properties of a natural product through the incorporation of Moringa oleifera oil to recycled low density polyethylene (LDPEr) in different proportions. The films were buried for different times and their degradation was evaluated.) Samples were characterized by DSC, TGA and XRD. It was observed that samples doped with Moringa oil showed lower degradation time. (author)

  5. Historical analysis of the oil leakage in the Sao Sebastiao channel, state of Sao Paulo, Brazil; Analise historica dos vazamentos de oleo no canal de Sao Sebastiao, SP

    Energy Technology Data Exchange (ETDEWEB)

    Poffo, Iris Regina F.; Xavier, Jose Carlos de M.; Serpa, Ricardo Rodrigues [CETESB, Sao Paulo, SP (Brazil); Schaeffer-Novelli, Yara [Sao Paulo Univ., SP (Brazil). Inst. de Quimica

    2000-07-01

    Preventing accidents is better than remedying. In order to establish this concept a study was conducted in order to give information about and to prevent sea oil spill accidents. Its first part addressed the main causes of 220 occurrences in north coast of State of Sao Paulo, Brazil based on both CETESB - Companhia de Tecnologia de Saneamento Ambiental and PETROBRAS - Petroleo Brasileiro S. A. data banks. These causes were classified in source, type and mode of failure. In the second part a methodology was developed in order to classify consequences from these events based on two environmental damage indexes regarding ecological and social-economic aspects. Shipping accidents and pipeline failures were responsible for major damages. The most often events caused by operational and mechanical failures mainly in ships and pier were responsible for medium and low severities. (author)

  6. Evaluation of low toxicity mineral oil base drilling fluids; Avaliacao de fluidos de perfuracao a base de oleo mineral de baixa toxidez

    Energy Technology Data Exchange (ETDEWEB)

    Ponte, Ielton Frederico da [PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Div. de Explotacao

    1990-12-31

    In order to introduce low toxicity mineral oil base drilling fluids in Brazil, we carried out a series with a low aromatic content basic oil for lubricants, produced by PETROBRAS: the Lubrax Industrial OB-9 (Lubind OB-9). This oil, as well as its mixture with aviation kerosene to reduce viscosity, was found adequate for use in drilling fluids together with other national products developed by companies that supply additives for drilling fluids in Brazil. We present the results of laboratory tests with systems of four different manufacturers, one of which was chosen for initial field tests. These tests, which were carried out at the Miranga and Bu River Fields, in the Drilling District of Bahia, produced satisfactory results. We anticipate the use of these fluids in other areas where the company operates. (author) 2 refs., 3 tabs.

  7. Characterization and potential application of pataua vegetable oil in apatite flotation; Caracterizacao e potencial aplicacao do oleo vegetal de pataua na floracao de apatita

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, P.S. de; Mansur, H.S.; Peres, A.E.C., E-mail: eng.priscila.oliveira@gmail.com [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil)

    2016-07-01

    The present research characterizes the Pataua palm (Oenocarpus bataua) oil regarding to its fatty acids profile and acidity index, and evaluates its use for apatite flotation. The Pataua oil evaluated is unsaturated e predominantly composed of cis-9-octadecenoic acid (oleic acid). The mineral sample characterization revealed a material composed by a fluoroapatite deficient in fluorine, a possibly result of isomorphic substitution, and with quartz and monazite inclusions. The analysis of the mineral after reagent conditioning, by Fourier Transform Infrared Spectroscopy (FTIR), pointed to the presence of characteristic bands of carbon chains and carboxylate group, suggesting the collector adsorption through the mechanisms of chemisorption and insoluble calcium salts precipitation. Thus, it is proposed the Pataua oil potential use in flotation systems aiming apatite recovery. (author)

  8. Membranes obtained from alumina from separation water/oil; Membranas obtidas a partir do residuo de alumina para separacao de agua/oleo

    Energy Technology Data Exchange (ETDEWEB)

    Rosas Neto, M.I.; Lira, H.L; Guimaraes, I.O; Franca, K.B., E-mail: moisesnetu@gmail.com [Universidade Federal de Campina Grande (UFCG), PB, (Brazil)

    2016-07-01

    This study aims to evaluate by flow test emulsion water/oil a membrane obtained from a crude residue of the alumina industry and see if this membrane is able to filter this emulsion within the limits specified by CONAMA. In this work, tubular membranes composed of the alumina and the residue bentonite clay were produced by extrusion and were sintered at 900, 1000 and 1100 ° C. tangential flow tests were conducted with deionized water and subsequently with an emulsion of water / oil, all done with a pressure of 1.5 bar. The results showed that membranes produced from the crude residue the alumina industry were quite efficient the emulsion's oil removal, reducing the concentration of about 100 ppm in the feed, to below 5ppm and flow rates of around 30L/h.m{sup 2}. (author)

  9. Evaluation of the crude oil viscosity variation in function of the demulsifiers addition; Avaliacao da variacao da viscosidade de oleo cru em funcao da adicao de desemulsificante

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Jansen M.; Lucas, Elisabete F. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Macromoleculas]. E-mail: elucas@ima.ufrj.br; Neves, Guilherme B.M. [COMAB Especialidades Quimicas Ltda., Rio de Janeiro, RJ (Brazil)]. E-mail: tecnico@comabrio.com

    2003-07-01

    One way of improving well production is the addition of demulsifier already in the gas lift. This is due to the apparent viscosity of water-in-oil emulsions being higher than apparent viscosity of crude oil, which in turn is higher than the apparent viscosity of an water-in-oil dual phase admixture and is also higher than the apparent viscosity of an oil-in-water emulsion. However, there are some situations where, in order to obtain separate flows of oil and water phases, demulsifier should be added in specific amounts in order to promote the desired phase separation. In heavy oils water and oil phase separation may be hard to obtain, however, the right demulsifier amount may imply in a considerable decrease in petroleum viscosity even without the appearance of two phases, making the flow easier. This work has evaluated the viscosity of a heavy crude having API degree 14 and BSW 52%, as a function of the addition of different amounts of DEMTROL BR 67, manufactured by Dow Quimica/Comab, Brazil, as demulsifier. (author)

  10. Heavy oil, water and air three-phase flow patterns in horizontal pipes; Padroes de escoamento trifasico de oleo pesado, agua e ar em tubulacoes horizontais

    Energy Technology Data Exchange (ETDEWEB)

    Trevisan, Francisco Exaltacao; Bannwart, Antonio Carlos [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil)

    2004-07-01

    A significant extent of the Brazilian oil reserves consists of heavy oil, and its importance and economic value have been increasing in the last years. However, these oils, besides their elevated densities (API degree lower than 20), have viscosities higher than 100 mPa.s, which make it more difficult their transportation in pipelines. A solution for this problem is the injection of water in the pipe, which causes a reduction of the friction factor and, consequently, of the energy expend for a given oil flow rate. The two-phase flow of heavy oil and water has been the object of a number of recent studies, and concepts such as the core-flow technology can be useful for heavy oil transportation. But in production operations, gas is also present, initially dissolved in the oil phase then leaving the solution to form a free gas phase if the pressure drops below the bubble point pressure, the study of three-phase flow of heavy oil, water and gas is in order. The present paper presents the experimental work developed to evaluate the effect that this third phase causes on the heavy oil-water two-phase flow pattern. Initially two-phase flow of heavy and gas-water was studied to establish the flow rate ranges that cover the main patterns already known. The superficial velocities used varied from 0,04 to 0,5 m/s for water, 0,01 to 22 m/s for gas and 0,02 to 1,2 m/s for oil. After that, three-phase flow patterns were visually determined through a 2,84 cm i.d. plexiglas tube using a high-speed camera. Nine three-phase flow patterns were identified which are presented visually and described. These flow-patterns are also presented in flow maps where the effect of the gas phase can be observed. Water was the continuous phase for all flow patterns observed, ensuring a low pressure drop along the pipe. (author)

  11. Mutagenic study of the diesel oil combustion through vegetal bioindicator; Estudo mutagenico da combustao de oleo diesel atraves de bioindicador vegetal

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Deuzuita dos Santos [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Escola de Engenharia. Nucleo de Engenharia Termica e Fluidos (NETeF); Paula Manoel Crnkovic [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Escola de Engenharia. Dept. de Engenharia Mecanica; Josmar Davilson Pagliuso [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Escola de Engenharia. Dept. de Hidraulica e Saneamento]. E-mail: deuzuita@sc.usp.br

    2006-07-01

    This work evaluates the mutagenic potential of the exhaustion from a diesel engine, by using the bioassay Trad-SH, used as bioindicator of the air polluted. In the experiments, the diesel exhausted air have been diluted in order to reach the typical urban polluted atmosphere (50, 100 and 150 ppm of CO)

  12. Performance of generating group diesel fed with different blends of soybean biodiesel; Desempenho de um grupo gerador diesel alimentado com diferentes misturas de biodiesel de oleo de soja

    Energy Technology Data Exchange (ETDEWEB)

    Reis, Elton Fialho dos; Amaral, Paulo Augusto Pedroso; Cunha, Joao Paulo Barreto; Freitas, Sueli Martins; Queiroz, Helio de Souza [Universidade Estadual de Goias (UNUCET/UEG), Anapolis, GO (Brazil). Unidade Universitaria de Anapolis], E-mail: bcunha_2@hotmail.com

    2010-07-01

    The replacement of diesel with biofuels or blends with diesel that is the most focused today to supply the shortage of petroleum based fuels. In Brazil the trend that biodiesel be used with regular diesel is increasing. As a result feasibility studies are becoming more necessary. The objective of this study was to evaluate use of biodiesel in different concentrations with diesel (B3, B5, B10, B20, B50 and B100) in a generating group diesel. Assays for quantification of the hourly consumption of fuel and emission of noise in different variants of the engine had been carried out. This was conducted through the electrical charge, connected to the generating group, and carried out through the analysis of the degree of Bosch blackening of the gases of exhaustion in the different concentrations. The equations of regression had good correlation with the real data. In conclusion the electric charge applied to the group generator increases proportionately with the time consumption and the emission of noise. However Biodiesel (B100) is different in comparison to other mixtures in the Bosch blackening test, presenting a lesser emission in relation to the other mixtures. (author)

  13. Alternatives for optimization of the heavy oil production in onshore marginal fields in Brazil; Alternativas para otimizacao de producao de oleos pesados em campos marginais terrestres no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Arlindo Antonio de [PETROBRAS, Rio de Janeiro, RJ (Brazil); Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia

    2004-07-01

    The intention of this article is to present possible alternatives for optimization of the production of heavy oils in marginal onshore fields in Brazil. The use of gas micro-turbines, the application of SAGD (Steam Assisted Gravity Drainage), the use of the drilling technique for river crossing and to a proposal for a new system of the rig less workovers are approached. The focus is the search of the increment of the production, the increase of the factor of final recovery, the global reduction of the costs and the minimization of the environmental impacts. The volumes of heavy oils in Campos Basin and in national onshore areas they are significant and, therefore, techniques and procedures that optimize its production are strategic. In the Brazilian Northeast there are a series of small fields of low productivity, in general of heavy oils, some in production there are more than twenty years that need of a reduction of the cost for barrel to continue producing. A realistic and responsible posture with the use of probabilistics concepts, techniques of engineering of the reliability, adoption of 'tolerable' levels of risk (associate to the return), attendance on line of the sceneries, premises and criteria, (proposal of the methodology GERISK), are relevant factors that can propitiate not only the reduction of the cost for produced barrel as well as to take the an increase of the factor of final recovery of the field. (author)

  14. Evaluation of emissions in gas powered electric generator engine with vegetable oil; Avaliacao das emissoes de gases em motor gerador eletrico alimentado com oleo vegetal

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Thalita C. de; Cunha, Joao Paulo Barreto; Cotrim, Suzane Santana; Brito, Gustavo Mendes; Delmond, Josue Gomes [Universidade Estadual de Goias (UNUCET/UEG), Anapolis, GO (Brazil). Unidade Universitaria de Ciencias Exatas e Tecnologicas], E-mail: thalitacarrijo@gmail.com

    2012-11-01

    The use of vegetable oils as fuel in diesel engines is a good alternative to reduce emissions of greenhouse gases in the atmosphere from the use of fossil fuels, either in pure form or as biodiesel. The soybean, oilseed single high-availability in Brazil, is the most viable feedstock for the production of oil and its use as a fuel because of the structure of production, distribution and grain crushing. This study aimed to evaluate the performance of a duty diesel generator fueled with blends of diesel and soybean oil at concentrations of 10%, 25%, 50% and 75%, and soybean oil pure, 100%. During the tests we evaluated the energy consumption of the generator and the emission of greenhouse gases (O{sub 2}, CO, CO{sub 2}, NO{sub x} and SO{sub 2}), according to the demand of electric charges (0, 500, 1000, 1500 and 2000 Watts) connected to the group generator. The results, using the F test, showed that the hourly consumption of fuel increased with increasing concentration in the mixture of diesel fuel and engine load demand from the generator. It follows that in the environment, increasing the oil concentration in the mixture caused a reduction in emissions, except for the emission of oxygen. The best choice for the operation for the engine generator using vegetable oil soya be provided for up to 60 % oil in the mixture and load demand up to 1000W, in which occurred lower emissions of carbon monoxide (CO) and therefore improved efficiency in the combustion process. (author)

  15. The offer expansion of non conventional oils and the limitation of greenhouse emission: the case of Canadian oil; A expansao da oferta de oleos nao convencionais e as restricoes de emissao de gases de efeito estufa: o caso do oleo canadense

    Energy Technology Data Exchange (ETDEWEB)

    Malagueta, Diego; Szklo, Alexandre; Schaeffer, Roberto [Universidade Federal do Rio de Janeiro (CT/UFRJ), RJ (Brazil). Centro de Tecnologia], e-mail: diegomalagueta@yahoo.com.br, e-mail: szklo@ppe.ufrj.br, e-mail: roberto@ppe.ufrj.br

    2008-07-01

    This work view to discussion and evaluates the consequences of the measurements on the exploitation and production (E and P) of the bituminous sands and to verify the possibility to occurs an evasion of investments in the sector and a canadian production less than the expected.

  16. Thermal and electrical properties of polymers produced from methyl oleate and bio diesel of sunflower and linseed oils; Propriedades termicas e eletricas de polimeros produzidos a partir do oleato de metila e amostras de biodiesel do oleo de girassol e oleo de linhaca

    Energy Technology Data Exchange (ETDEWEB)

    Nicolau, Aline; Reiznautt, Quelen B.; Martini, Denise D.; Samios, Dimitrios [Universidade Federal do Rio Grande do Sul - UFRGS, RS (Brazil)

    2011-07-01

    Polyesters were prepared from epoxidized biodiesel with different unsaturation degrees. The polymerisation was performed using epoxidized methyl esters of oleic acid (EPOAME), sunflower oil (EPSOME) and linseed oil (EPLOME) with cis-1,2-cyclohexanedicarboxylic anhydride and triethylamine. Differential Scanning Calorimetry (DSC) demonstrated that reaction enthalpy was proportional to the unsaturation degree of each methyl ester. With an increase in unsaturation degree, the activation energy linearly decreased. The intermediate structures and the polyesters were characterised using Nuclear Magnetic Resonance (NMR) techniques. The molecular weight of the polymers synthesised with EPOAME, EPSOME and EPLOME were, respectively, 2.5x103, 5.3x103 and 14x103 g/mol. The glass transition of the product obtained from EPOAME was -59 degree C. The polymers based on EPSOME and EPLOME exhibited higher Tg values, which were -11 and -6 degree C, respectively. Electric impedance measurements of the polyesters showed that an increase in unsaturation degree resulted in an increase in resistivity and a decrease in capacitance. (author)

  17. Reduction of gaseous pollutants and particulate materials by using fuels derived from vegetable in substitution to diesel oil; Reducao de poluentes gasosos e de material particulado por meio do uso de combustiveis a base de oleos vegetais como substitutos ao oleo diesel

    Energy Technology Data Exchange (ETDEWEB)

    Yazaki, Carlos Kazuaki [General Motors do Brasil, Sao Caetano do Sul, SP (Brazil). Engenharia de Chassis e Integracao Powertrain]. E-mail: carlos.yazaki@gm.com; Trielli, Mauricio Assumpcao [Sao Paulo Univ., SP (Brazil). Escola Politecnica. Dept. de Engenharia Mecanica]. E-mail: trielli@ipt.br

    2006-07-01

    The aim of this article is to present the contribution allowed by fuels derived from vegetable oils in substitution for the diesel oil. It especially emphasizes the vegetable oil esters potential as gaseous exhaust pollutant and particulate matter reduction produced by ignition compression engines, such a conclusion has been achieved through systematization and analysis of results of experimental tests performed by several researchers that applied natural vegetable oils and their esters to this class of engines. Once the vegetable oils are the base of formation of these fuels, their direct application in these engines is also analyzed showing the advantages and disadvantages of this alternative route. This article also includes an analysis of their physical and chemical properties which help the understanding of their performance in the engines. Due to better results obtained from esters use, their industrial processing, the special characteristics of the engineering materials which they will have contact in engine, principally those used in injection systems, as well as aspects related to their storages are discussed too. (author)

  18. Lipid Processing Technology: Building a Multilevel Modeling Network

    OpenAIRE

    Diaz Tovar, Carlos Axel; Mustaffa, Azizul Azri; Hukkerikar, Amol; Quaglia, Alberto; Sin, Gürkan; Kontogeorgis, Georgios; Sarup, Bent; Gani, Rafiqul

    2011-01-01

    Over the past few decades, the world’s fats and oils production has been growing rapidly, far beyond the need for human nutrition. This overproduction combined with the growing consumer preferences for healthier food products and the interest in bio‐fuels, has led the oleo chemical industry to face in the upcoming years major challenges in terms of design and development of better products and more sustainable processes. Although the oleo chemical industry is mature and based on well establis...

  19. Medicinal lavender modulates the enteric microbiota to protect against Citrobacter rodentium-induced colitis.

    Science.gov (United States)

    Baker, J; Brown, K; Rajendiran, E; Yip, A; DeCoffe, D; Dai, C; Molcan, E; Chittick, S A; Ghosh, S; Mahmoud, S; Gibson, D L

    2012-10-01

    Inflammatory bowel disease, inclusive of Crohn's disease and ulcerative colitis, consists of immunologically mediated disorders involving the microbiota in the gastrointestinal tract. Lavender oil is a traditional medicine used to relieve many gastrointestinal disorders. The goal of this study was to examine the therapeutic effects of the essential oil obtained from a novel lavender cultivar, Lavandula×intermedia cultivar Okanagan lavender (OLEO), in a mouse model of acute colitis caused by Citrobacter rodentium. In colitic mice, oral gavage with OLEO resulted in less severe disease, including decreased morbidity and mortality, reduced intestinal tissue damage, and decreased infiltration of neutrophils and macrophages, with reduced levels of TNF-α, IFN-γ, IL-22, macrophage inflammatory protein-2α, and inducible nitric oxide synthase expression. This was associated with increased levels of regulatory T cell populations compared with untreated colitic mice. Recently, we demonstrated that the composition of the enteric microbiota affects susceptibility to C. rodentium-induced colitis. Here, we found that oral administration of OLEO induced microbiota enriched with members of the phylum Firmicutes, including segmented filamentous bacteria, which are known to protect against the damaging effects of C. rodentium. Additionally, during infection, OLEO treatment promoted the maintenance of microbiota loads, with specific increases in Firmicutes bacteria and decreases in γ-Proteobacteria. We observed that Firmicutes bacteria were intimately associated with the apical region of the intestinal epithelial cells during infection, suggesting that their protective effect was through contact with the gut wall. Finally, we show that OLEO inhibited C. rodentium growth and adherence to Caco-2 cells, primarily through the activities of 1,8-cineole and borneol. These results indicate that while OLEO promoted Firmicutes populations, it also controlled pathogen load through

  20. Evaluation of the potential of additives as corrosion inhibitors of CA-50 carbon steel used as reinforcement in concretes; Avaliacao da potencialidade de aditivos como inibidores de corrosao do aco carbono CA-50 usado como armadura de estruturas de concreto

    Energy Technology Data Exchange (ETDEWEB)

    Mennucci, Marina Martins

    2006-07-01

    In this work, various compounds were tested to evaluate their potential capability for their use as corrosion inhibitors of carbon steel reinforcement in concretes. The additives tested were sodium benzoate, polyethylene glycol, hexamethylenetetramine, benzotriazole and yttrium carbonate. Initially, exploratory tests were carried out to select the ones to be used as corrosion inhibitors, based on the inhibit ion efficiency determined from electrochemical tests, specifically polarization tests and electrochemical impedance spectroscopy. These tests were carried out in a solution composed of 0.01 N sodium hydroxide (NaOH) and 0.05 N potassium hydroxide (KOH) to simulate the composition of the solution inside the pores in concretes. The additive that presented the most promising potential to be used as corrosion inhibitor was benzotriazole (BTA). After the elimination of some compounds and selection of the additive with higher corrosion inhibit ion efficiency in the test medium, the effect of its concentration on the corrosion inhibition efficiency was evaluated. Sodium nitrite solutions with the same concentrations as those solutions with BTA were tested for comparison reasons. Sodium nitrite is a well established corrosion inhibitor for carbon steel reinforcement in concretes but it has been related to toxic effects. The BTA was associated to higher corrosion inhibition efficiencies than that of sodium nitrite in similar concentrations. A blackish adherent film was formed on the steel surface exposed to BTA solutions during long periods of immersion in the alkaline medium. The results suggest that BTA is a potential candidate for substitution of nitrites as corrosion inhibitor of reinforcements in concrete. (author)

  1. Elaboración de hormigones que minimicen el impacto al ambiente, empleando neumáticos usados de vehículos livianos y pesados, en la provincia de Santa Elena

    OpenAIRE

    Armando Saltos

    2016-01-01

    Las llantas usadas son consideradas un foco de riesgo ambiental y sanitario a nivel mundial, por ejemplo en Ecuador se desecha al año, según la Corporación para la Promoción Proactiva de Inversiones (INVEC), cerca de 2,4 millones de neumáticos de diversos tipos, lo que equivale a 55.000 toneladas. La menor parte de ellos son reutilizados para el reencauchado, pero la gran mayoría es incinerada o depositada en basureros a cielo abierto, lo que supone una amenaza contra el medio ambiente y ries...

  2. Comparative study between output factors obtained in a linear accelerator used for radiosurgery treatments; Estudio comparativo entre factores de campo obtenidos en un acelerador lineal usado para tratamientos con radiocirugía

    Energy Technology Data Exchange (ETDEWEB)

    Velázquez Trejo, J.J.; Olive, K.I.; Gutiérrez Castillo, J.G.; Hardy Pérez, A.E.

    2017-11-01

    Purpose: To compare the output factors obtained in a linear accelerator with conical collimators using five models of detectors, through tree different methods: the ratio of detector readings, the “daisy chain” technique (for diodes) and applying the k fclin, fmsr Qclin, Qmsr factors based in the formalism proposed by the IAEA (this one was applied only to tree detectors). Methods: A linear accelerator Varian-iX was employed with BrainLab conical collimators (30 mm to 7.5 mm), the detectors used were: PTW-PinPoint 31016 (×2), PTW-tipo E 60017 (×2), PTW-microLion 31018 (×2), EDGE (Sun-Nuclear), y PTW-Semiflex 31010. For the first three models were analyzed two detectors with different series. The measurements were carried out in water at depth of 1.5 cm and source to surface distance of 98.5 cm. Results: With the readings ratio method, all detectors showed differences from 3.5% to more than 15% in the smallest field sizes, for the diodes the “daisy chain” method did not provide significant corrections. Applying the k fclin, fmsr Qclin, Qmsr Small the detectors PTW60017, PTW31018 and EDGE showed differences of less than 3%. Conclusions: In small fields the readings ratio method could introduce significant errors in the output factor determination. Applying the k fclin, fmsr Qclin, Qmsr proved to be a viable option. [Spanish] Objetivo: Comparar los factores de campo obtenidos en un acelerador lineal con colimadores cónicos utilizando cinco modelos de detectores, mediante tres métodos distintos: a través del cociente entre lecturas de los detectores, con la técnica “daisy chain” (para diodos) y aplicando los factores k fclin, fmsr Qclin, Qmsr basados en el formalismo propuesto por la IAEA (sólo a tres detectores). Métodos: Se empleó un acelerador lineal Varian-iX con colimadores cónicos BrainLab (30mm a 7.5mm), los detectores utilizados fueron: PTW-PinPoint 31016 (×2), PTW-tipo E 60017 (×2), PTW-microLion 31018 (×2), EDGE (Sun-Nuclear), y PTW-Semiflex 31010. De los tres primeros modelos se analizaron dos detectores con series distintas. Las medidas se realizaron en agua a una profundidad de 1.5 cm y una distancia fuente superficie de 98.5 cm. Resultados: Con el método de cociente de lecturas todos los detectores mostraron discrepancias desde 3.5% hasta más de 15% en los campos más pequeños, para los diodos el método “daisy chain” no ofreció correcciones significativas. Aplicando los k fclin, fmsr Qclin, Qmsr los detectores PTW60017, PTW31018 y EDGE mostraron diferencias menores al 3%. Conclusiones: En campos pequeños el método del cociente de lecturas puede introducir errores significativos en la determinación de los factores de campo. La aplicación de los k fclin, fmsr Qclin, Qmsr mostró ser la opción más viable.

  3. Elaboración de hormigones que minimicen el impacto al ambiente, empleando neumáticos usados de vehículos livianos y pesados, en la provincia de Santa Elena

    Directory of Open Access Journals (Sweden)

    Armando Saltos

    2016-04-01

    En su segunda etapa se realizará el diseño de hormigón incluyendo las partículas de neumáticos triturados, en el que se dará a conocer cuál es el porcentaje óptimo que se incluirá este material con respecto al hormigón. Por lo tanto con la ejecución de este proyecto se reduciría sustancialmente la contaminación que produce este tipo de desechos, además de proporcionar un uso adecuado en términos de construcción en la provincia de Santa Elena.

  4. Elaboración de hormigones que minimicen el impacto al ambiente, empleando neumáticos usados de vehículos livianos y pesados, en la provincia de Santa Elena.

    Directory of Open Access Journals (Sweden)

    Armando Saltos

    2015-10-01

    Waste from rubbers tires are considered to be an environmental and sanitary risk worldwide. As an example in Ecuador, every year nearly 2.4 million rubber tires of various types are discarded as trash, which is equivalent to 55000 tons, according to the Proactive Corporation for Investment Promotion (INVEC. A small porcentage of the waste, are reused to be re-rubberized. But the majority is incinerate or deposited in dumping grounds open to the environment, which is a huge risk to the environment and the health of individuals. The project seeks to create a design of concrete including particles of rubber from discarded tires. The tires will undergo a rigorous selection process, a controlled threading process, and a fabrication according to the specifications of the international standards of concrete of the American Concrete Institute (ACI and the Construction Ecuatorian Standards (NEC, and based on these specifications, the goal is to obtain an acceptable concrete apt to be used in low traffic streets, sidewalks, pedestrian zones, and other concrete structures, minimizing the environmental impact to the misuse of tires in the province of Santa Elena.

  5. Testing methodology of diamond composite inserts to be used in the drilling of petroleum wells; Metodologia de testes de insertos compositos diamantados a serem usados na perfuracao de pocos de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Bobrovnitchii, G.S.; Filgueira, M.; Skury, A.L.D.; Tardim, R.C. [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil)], e-mail: rtardim@terra.com.br

    2006-07-01

    The useful life of the inserts used in the cutters of the drills for perforation of oil wells determines the quality of the perforation as well as the productivity. Therefore, the research of the wear of insert is carried through with the objective to foretell the most important properties of the inserts. Due to the fact of the UENF to be developing the processes of composites sintering to the synthetic diamond base, it is interesting to define the testing methodology of the gotten inserts. The proposed methodology is based on the evaluation of the wear suffered by de sample. For this end a micro processed 'Abrasimeter', model AB800-E, manufactured for the Contenco Company was used. The instrument capacity is 1,36 kVA; axial load applied in the cutter up to 50 kgf; rotation of table speed 20 rpm; course of the tool in radial direction speed before 2 m/min; dimensions of the granite block D = 808 mm, d = 484 mm, h = 50 mm. The gotten results show that the proposed methodology can be used for the evaluation of the inserts of the cutters applied in perforation drills. (author)

  6. Quantitative analysis of results of quality control tests in linear accelerators used in radiotherapy; Analise quantitativa dos resultados de testes de controle de qualidade em aceleradores lineares usados em radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Passaro, Bruno M.; Rodrigues, Laura N. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Videira, Heber S., E-mail: bruno.passaro@gmail.com [Universidade de Sao Paulo (HCFMRP/USP), Sao Paulo, SP (Brazil). Faculdade de Medicina. Hospital das Clinicas

    2013-04-15

    The aim of this study is to assess and analyze the stability of the calibration factor of three linear accelerators, as well as the other dosimetric parameters normally included in a program of quality control in radiotherapy. The average calibration factors of the accelerators for the period of approximately four years for the Clinac 600C and Clinac 6EX were (0.998±0.012) and (0.996±0.014), respectively. For the Clinac 2100CD 6 MV and 15 MV was (1.008±0.009) and (1.006±0.010), respectively, in a period of approximately four years. The data of the calibration factors were divided into four subgroups for a more detailed analysis of behavior over the years. Through statistical analysis of calibration factors, we found that for the 600C and Clinacs 2100CD, is an expected probability that more than 90% of cases the values are within acceptable ranges according to TG-142, while for the Clinac 6EX is expected around 85% since this had several exchanges of accelerator components. The values of TPR20,10 of three accelerators are practically constant and within acceptable limits according to the TG-142. It can be concluded that a detailed study of data from the calibration factor of the accelerators and TPR{sub 20},{sub 10} from a quantitative point of view, is extremely useful in a quality assurance program. (author)

  7. Ruminal degradability In Situ of nutritive components of some / Degradabilidade ruminal In Situ dos componentes nutritivos de alguns suplementos concentrados usados na alimentação de bovinos

    Directory of Open Access Journals (Sweden)

    Filipe Alexandre Boscaro de Castro

    2009-07-01

    Full Text Available Degradability “in situ” of dry matter (DM, organic matter (OM, crude protein (CP, neutral detergent fiber (NDF and acid detergent fiber (ADF of whole cotton seed (WCS, soybean meal (SM, sunflower seed (SS, turnip cake (TC and ground corn (GC were determined with incubation of nylon bags in the rumen of five steers ½ Simmental-Zebu. The effective degradability (ED of dry matter and crude protein with 5%/h of passage rate were respectively 40,93 and 48,95% for cotton seed; 67,35 and 53,20% for soybean meal; 63,38 and 72,50% for sunflower seed; 66,59 and 57,82% for turnip cake and 3,65 e 54,18% for ground corn. Through the fermentation rates of the different nutritious components determined on this experiment it was concluded that turnip cake has a potential to substitute soybean meal as a protein source in ruminant feeding; sunflower seed presents a high soluble fraction of crude protein and the cotton seed ether extract may affect negatively the degradation of dry matter and organic matter of this feed, specially when provided ground to the animals.As degradabilidades in situ da matéria seca (MS, matéria orgânica (MO, proteína bruta (PB, fibra em detergente ácido (FDA e da fibra em detergente neutro (FDN do caroço de algodão integral (CAI, farelo de soja (FS, grão de girassol (GG, torta de nabo forrageiro (TN e do milho triturado (MT foram determinadas com a incubação de sacos de náilon no rúmen de cinco bovinos ½ sangue Simental-Zebu. As degradabilidades efetivas (DE da matéria seca (MS e da proteína bruta (PB a taxa de passagem de 5%/h, foram, respectivamente, 40,93 e 48,95% para o caroço de algodão integral; 67,35 e 53,20% para o farelo de soja; 63,38 e 72,50% para o grão de girassol; 66,59 e 57,82 para torta de nabo forrageiro e 63,65 e 54,18% para o milho triturado. Por meio das taxas de fermentação dos diferentes componentes nutritivos determinadas neste experimento, pode-se concluir que a torta de nabo forrageiro tem potencial para substituir o farelo de soja como fonte protéica na alimentação de ruminantes; o grão de girassol apresenta elevada fração solúvel da proteína bruta e o teor de extrato etéreo presente no caroço de algodão pode afetar negativamente a degradação da matéria seca e da matéria orgânica deste alimento, principalmente quando este é fornecido triturado aos animais.

  8. Seletividade de inseticidas usados na cultura da macieira a ovos de Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae Selectivity of insecticides used in apple orchards to eggs of Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae

    Directory of Open Access Journals (Sweden)

    Antônio José Ferreira

    2005-08-01

    Full Text Available Neste trabalho, foi avaliado o efeito de inseticidas sobre ovos de duas populações de Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae. O trabalho foi realizado em laboratório (25±2°C, UR de 70±10% e fotofase de 12 horas avaliando-se inseticidas, nas concentrações indicadas pelos fabricantes e/ou que estão em fase de pesquisa para o controle da mariposa-oriental, lagarta-enroladeira e mosca-das-frutas na cultura da macieira. Os produtos e dosagens (g ou mL do p.c. 100L-1 de água avaliados foram: fosmet (Imidan 500 PM - 200, metoxifenozide (Intrepid 240 SC - 60, tebufenozide (Mimic 240 SC - 60, benzoato de emamectina (Proclaim 5 SG - 15, spinosad (Tracer 480 SC - 20, etofenprox (Trebon 100 SC - 150, clorpirifós etil (Lorsban 480 BR - 150 e testemunha (somente água. As pulverizações foram realizadas em ovos com até 12 horas de idade, utilizando-se torre de Potter. Avaliaram-se a viabilidade dos ovos, o período embrionário, e a sobrevivência das larvas de primeiro e segundo estádios provenientes dos ovos tratados. A toxicidade dos produtos foi determinada em função da mortalidade acumulada do predador durante o seu desenvolvimento, classificando-os conforme escala proposta pela IOBC. As duas populações de C. externa apresentaram o mesmo padrão de resposta aos produtos fitossanitários avaliados quando aplicados sobre ovos. Fosmet, metoxifenozide, tebufenozide, benzoato de emamectina, spinosad e etofenprox foram considerados inócuos, e clorpirifós etil levemente nocivo a ovos de C. externa, provocando a redução de 43,7% na viabilidade dos ovos e afetando em 20% a sobrevivência das larvas de primeiro estádio originadas dos ovos tratados.The effect of some insecticides on eggs of two populations of Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae were evaluated under laboratory conditions (25±2°C, RH of 70±10% and 12 hours-photophase. The compounds were used at commercial or research concentrations used to control oriental fruit moth, leaf roller and fruit fly on apple orchards. The products and rates (g ou mL of formulated product 100L-1 of water evaluated were: phosmet (Imidan 500 PM - 200, methoxyfenozide (Intrepid 240 SC - 60, tebufenozide (Mimic 240 SC - 60, emamectin benzoate (Proclain 5 SG - 15, spinosad (Tracer 480 SC - 20, etofenprox (Trebon 100 SC - 150 and chlorpyrifos (Lorsban 480 BR - 150, using water as control. Spraying of insecticides was on eggs (12 hours old using the Potter tower. Survival and the period of the developmental stages were evaluated from treated eggs to the second-instar larvae, according to the IOBC recommendations. Both C. externa populations showed similar results for compounds applied. Phosmet, methoxyfenozide, tebufenozide, emamectin benzoate, spinosad and etofenprox were harmless, whereas chlorpyrifos was slightly harmful to C. externa, killing 43,7% of the eggs and 20% of the first-instar larvae from the treated eggs.

  9. Compatibility between the entomopathogenic fungus Beauveria bassiana and insecticides used in coffee plantations Compatibilidade entre o fungo entomopatogênico Beauveria bassiana e inseticidas usados na cultura do cafeeiro

    Directory of Open Access Journals (Sweden)

    Carolina Natali de Oliveira

    2003-12-01

    Full Text Available Microbial control in integrated pest management (IPM programs of coffee plantations is an important factor for the reduction of pest population densities. The use of selective pesticides can be associated with entomopathogens, increasing the efficiency of the control and reducing the use of required insecticides. The in vitro fungitoxic effect of insecticide formulations of Thiamethoxam, Cyfluthrin, Deltamethrin, Alpha-Cypermethrin, Triazophos, Chlorpyrifos, Fenpropathrin and Endosulfan and Beauveria bassiana (CG 425 strain was evaluated at three concentrations (FR = average field recommendation; 0.5 ´ FR and 2 ´ FR. Effects of these products on conidia germination, vegetative growth and sporulation were compared. Only five insecticides, at the FR concentration, promoted conidia viability higher than 60%. Viability should be considered the most important factor to be evaluated since it is the first step of the infection process. The insecticide formulations of Alpha-Cypermethrin, Thiamethoxam and Cyfluthrin caused the lower inhibition level on conidia germination at the two lower concentrations, with no difference in relation to the control. With respect to vegetative growth analysis, Thiamethoxam at the two lower concentrations was not found to cause radial growth inhibition. Thiamethoxam caused the smallest inhibition level with regard to conidia production. The use of Alpha-Cypermethrin and Thiamethoxam formulations in coffee IPM programs for a B. bassiana inoculum conservation strategy are recommended, since these products were compatible with the entomopathogenic fungus Beauveria bassiana (CG 425, an important natural control agent of the coffee berry borer, Hypothenemus hampei.Em programas de Manejo integrado de pragas (MIP deve-se considerar o controle microbiano como um importante fator de redução da densidade populacional de pragas. A utilização de produtos seletivos quando associados a patógenos, pode aumentar a eficiência de controle, reduzindo assim a quantidade de inseticidas. O efeito fungitóxico in vitro das formulações inseticidas de Tiametoxan, Ciflutrin, Deltametrin, Alfacipermetrina, Triazofos, Clorpirifós, Fenpropatrin e Endosulfan em três concentrações (RC= recomendação média para campo, 0,5 ´ RC e 2 ´ RC, foi avaliado sobre a germinação dos conídios, crescimento vegetativo e produção de conídios no fungo Beauveria bassiana. Apenas cinco formulações inseticidas, na concentração RC, proporcionaram viabilidade dos conídios acima de 60%. A viabilidade deve ser considerada o parâmetro mais importante a ser avaliado por ser o passo inicial no processo de infecção. As formulações de Alfacipermetrina, Tiametoxan e Ciflutrin, nas menores concentrações, causaram a menor inibição da germinação, sem diferença em relação à testemunha. Analisando-se o crescimento vegetativo, observou-se que a formulação de Tiametoxan nas menores concentrações, não inibiu o crescimento radial, sendo o crescimento vegetativo nos demais tratamentos inferior à testemunha. A formulação de Tiametoxan também proporcionou a menor inibição na produção de conídios. Os inseticidas com formulações de Alfacipermetrina e Tiametoxan mostraram-se compatíveis com o fungo Beauveria bassiana (CG 425, importante agente natural de controle da broca do café Hypothenemus hampei e podem ser recomendados para MIP no cafeeiro

  10. Seletividade de diferentes agrotóxicos usados na cultura da soja ao parasitoide de ovos Telenomus remus Selectivity of different pesticides used in soybean to the eggs parasitoid Telenomus remus

    Directory of Open Access Journals (Sweden)

    Eduardo Lima do Carmo

    2009-11-01

    Full Text Available A preservação dos agentes de controle biológico no agroecossistema é indispensável para o sucesso do manejo integrado de pragas. Entretanto, o controle químico de pragas ainda é indispensável em diversas culturas. Nesse contexto, a seletividade dos agrotóxicos aos inimigos naturais deve ser sempre considerada na escolha do melhor produto. Portanto, este estudo verificou o impacto causado por diferentes agrotóxicos na emergência do parasitoide de ovos Telenomus remus Nixon (Hymenoptera: Scelionidae, quando aplicados nas fases de larva e pupa (posturas de 100 a 150 ovos de Spodoptera frugiperda (J.E. Smith (Lepidoptera: Noctuidae seis e 10 dias após o parasitismo, respectivamente. Três ensaios, com 11 tratamentos e cinco repetições, foram conduzidos em laboratório com inseticidas, fungicidas e herbicidas, respectivamente. Cada ensaio foi conduzido com 10 tratamentos de agrotóxicos e água como testemunha seletiva. Todos os produtos fitossanitários foram testados nas doses utilizadas na cultura da soja. Ovos de S. frugiperda parasitados por T. remus foram imersos nos tratamentos por cinco segundos e, após secagem total, foram acondicionados em sacos plásticos até a emergência dos adultos dos parasitoides. A viabilidade do parasitismo foi avaliada, e a redução na emergência dos parasitoides foi classificada segundo as normas da International Organization for Biological Control (IOBC. Os resultados mostraram que os inseticidas do grupo dos reguladores de crescimento, como o flufenoxurom, diflubenzurom e metoxifenozido e também os inseticidas imidacloprido + beta-ciflutrina e acefato, foram seletivos às fases imaturas do parasitoide. Espinosade foi classificado como inócuo para larvas de T. remus. Gama-cialotrina foi levemente nocivo para larvas e inócuo para pupas. Bifentrina e clorpirifós foram, respectivamente, levemente nocivo e nocivo para ambas as fases de desenvolvimento de T. remus. Com relação aos herbicidas testados, 2,4-D, S-metolacloro, flumioxazina, dicloreto de paraquate + diurom, dicloreto de paraquate e glifosato (Roundup Transorb® foram seletivos. Entretanto, glifosato + imazetapir, clomazona, glifosato (Gliz®, glifosato (Roundup Ready® foram seletivos para a fase de larva e levemente nocivos (classe 2 para a fase de pupa de T. remus. Resultados semelhantes foram obtidos com os fungicidas flutriafol + tiofanato metílico, carbenzadim, trifloxistrobina + tebuconazole e azoxistrobina + ciproconazole, que foram classificados como inócuos. Tiofanato-metílico, tebuconazole e epoxiconazole + piraclostrobina foram levemente nocivos para larvas e inócuos para pupas. Inversamente, epoxiconazole e azoxistrobina foram seletivos para a fase de larva e levemente nocivos para a fase de pupa do parasitoide. Flutriafol foi classificado como levemente nocivo para ambas as fases de T. remus.Biological control agent preservation is crucial to the integrated pest management success. However, chemical control is yet useful for crop production. Thus, pesticide selectivity to beneficial insects is a feature that must always be taken into account in order to choose the best chemical. Therefore, this research studied the impact caused by different pesticides in the egg parasitoid, Telenomus remus Nixon (Hymenoptera: Scelionidae emergence, when sprayed on the larvae and pupae stage (Egg masses from 100 to 150 eggs of Spodoptera frugiperda (J.E. Smith (Lepidoptera: Noctuidae six and ten days after the parasitism, respectively. Three trials, with 11 treatments and 5 repetitions, were carried out in the laboratory with insecticides, fungicides and herbicides. Each test was carried out with 10 treatments of chemicals and water as control. All chemicals were tested at rates used in soybean crops. Eggs of S. frugiperda parasitized by T. remus, were immersed in the treatments for five seconds. After completely dry, they were placed in plastic bags until the emergence of adults of parasitoids. The viability of parasitism was evaluated and the reduction in the emergence of the parasitoids classified according to the rules of the International Organization for Biological Control (IOBC. The results showed that the insect growth-regulating (IGR insecticides flufenoxuron, diflubenzuron, methoxyfenozide as well as the insecticides imidacloprid + beta-cyfluthrin and acephate were harmless to the parasitoid immature stages . Spinosad was classified as harmless for larvae of T. remus. Gama-cyhalothrin was slightly harmful to larvae and harmless to pupa of T. remus. Bifenthrin and chlorpyrifos were, respectively, slightly harmful and harmful to both stages of development of T. remus development. Regarding to the tested herbicides, 2,4-D, s-metolachlor, flumioxazin, paraquat dichloride + diuron, paraquat dichloride and glyphosate (Roundup Transorb® were harmless. However, glyphosate + imazethapyr, clomazone, glyphosate (Gliz®, glyphosate (Roundup Ready® were harmless to the larvae stage and slightly harmful (class 2 to T. remus pupae. Similar results were obtained with the fungicides flutriafol + tiofanate, carbenzadin, tebuconazol + trifloxystrobin and azoxystrobin + ciproconazol which were classified as harmless. Tiofanate-metil, tebuconazol and epoxyconazol + pyraclostrobin were slightly harmful to larvae and pupae. Inversely, epoxyconazol and azoxystrobin were harmless to larvae and slightly harmful to pupae. Flutriafol was classified as slightly harmful to both development stages of T. remus.

  11. Características psicométricas dos instrumentos usados para avaliar a qualidade de vida na esclerose múltipla: uma revisão bibliográfica

    OpenAIRE

    Pedro,Luísa Maria Reis; Pais-Ribeiro,José Luís

    2008-01-01

    A esclerose múltipla (EM) é a doença crônica neurológica que mais afeta adultos jovens; em 80% dos casos, a doença progride para situações de níveis variados de incapacidade, o que torna necessário avaliar a qualidade de vida (QV) desses indivíduos. O objetivo desta revisão foi localizar estudos que avaliam a QV em indivíduos com EM, identificando os instrumentos utilizados e suas características psicométricas. Foram consultadas as bases Psycinfo, Psycarticles, Psycbooks, Psychology & Beh...

  12. Piranha attacks in dammed streams used for human recreation in the State of São Paulo, Brazil Ataques de piranhas em riachos represados usados para atividades de lazer, no Estado de São Paulo

    Directory of Open Access Journals (Sweden)

    Vidal Haddad Junior

    2010-10-01

    Full Text Available In recent years, attacks by piranhas have become a common problem in dammed portions of rivers and streams in the State of Sao Paulo, Southeastern Brazil. In two outbreaks recorded in two neighboring counties in the Northwest region of the state, 74 bathers were bitten. Only one bite per person was recorded during a short period of the year. The bites were related to parental care and/or defense of spawning territory, which confirms previous studies and demystify the attacks by these legendary fish, as they are perceived by most people. Placement of fine mesh nets and removal of aquatic vegetation stopped the attacks.Ataques por piranhas vêm se tornando um problema comum em trechos represados de rios e córregos no estado de São Paulo, Sudeste do Brasil. Em dois surtos ocorridos em dois municípios vizinhos no noroeste do estado, 74 banhistas foram mordidos. Uma mordida por pessoa foi registrada, em curto período do ano. As mordidas estão relacionadas a cuidado parental e/ou defesa do território de desova, o que reforça estudos anteriores e desmistifica os ataques por este peixe lendário, da maneira como são popularmente percebidos. A colocação de redes de malha fina e a remoção de vegetação aquática cessaram os ataques.

  13. Evaluation of used vegetable oil for biogas production in Spain; Evaluacion del potencial de aceite vegetal usado para la obtencion de biogasoleo en la Comunidad de Castilla y Leon

    Energy Technology Data Exchange (ETDEWEB)

    Antolin, G.; Tinaut, F. V.; Saez, A. R.; Vegas, L.; Briceno, Y. [Universidad de Valladolid (Spain)

    2002-07-01

    This work studies the potential of the residual vegetal oil that is generated in the Community of Castilla and Leon, evaluating the one that could be destined for the production of biogas. Also, it sets out a management model that will allow to establish a suitable collection and processing of this oil. (Author) 10 refs.

  14. Expressão de caracteres de tubérculos em função do tamanho de recipiente usado no cultivo de batata na geração de plântulas

    Directory of Open Access Journals (Sweden)

    Mario Alvaro Aloisio Verissimo

    2012-12-01

    Full Text Available No melhoramento genético de batata, para alguns caracteres, é possível eliminar genótipos inferiores já nas gerações iniciais, o que permite reduzir o número de genótipos avaliados a campo, proporcionando redução de custos. O objetivo deste trabalho foi verificar a influência do tamanho de vaso na expressão de caracteres de tubérculo, em famílias de batata, na geração de plântula. Em casa de vegetação, dez famílias de batata foram avaliadas em dois tamanhos de recipientes, vaso grande (1 L e vaso pequeno (250 ml. Os caracteres de tubérculos avaliados foram: cor, aspereza, profundidade de olho, sobrancelha, formato, uniformidade de formato, apontamento, curvatura, achatamento, aparência geral, massa por planta, massa média e número de tubérculos. O vaso grande proporciona maior expressão da variação genética para os caracteres profundidade de olho, sobrancelha, curvatura, achatamento, aparência geral e todos os componentes de rendimento. As maiores médias de produção de tubérculos em número, tamanho e massa foram obtidas no vaso grande, enquanto o maior coeficiente de variação genético para os caracteres formato, uniformidade de formato e apontamento de tubérculo foi obtido no vaso pequeno.

  15. Seletividade de inseticidas usados na cultura da macieira a duas populações de Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae Selectivity of insecticides used in apple orchards to two populations of Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae

    Directory of Open Access Journals (Sweden)

    Antônio José Ferreira

    2006-04-01

    Full Text Available Neste trabalho, foi avaliado o efeito de inseticidas sobre larvas de duas populações de Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae, oriundas de pomares de Bento Gonçalves e Vacaria, RS. O trabalho foi realizado em laboratório (25±2°C, UR de 70±10% e fotofase de 12 horas avaliando-se inseticidas, nas concentrações indicadas pelos fabricantes e/ou que estão em fase de pesquisa para o controle da mariposa oriental, lagarta enroladeira e mosca-das-frutas na cultura da macieira. Os inseticidas e dosagens (g ou mL do p.c./100L de água avaliados foram: fosmet (Imidan 500 PM - 200, metoxifenozide (Intrepid 240 SC - 60, tebufenozide (Mimic 240 SC - 60, benzoato de emamectina (Proclaim 5 SG - 15, spinosad (Tracer 480 SC - 20, etofenprox (Trebon 100 SC - 150, clorpirifós etil (Lorsban 480 BR - 150 e testemunha (somente água. As pulverizações foram realizadas em larvas de primeiro ínstar utilizando torre de Potter. Avaliaram-se a sobrevivência e a duração das fases de larva e pupa e, a fecundidade e a fertilidade dos adultos sobreviventes. A toxicidade dos produtos foi calculada em função do efeito total (E de cada produto, conforme recomendações da IOBC. Para larvas de primeiro ínstar do crisopídeo oriundas de Bento Gonçalves, benzoato de emamectina, foi classificado como inofensivo (classe 1; metoxifenozide, etofenprox, tebufenozide, spinosad e fosmet, como levemente nocivos (classe 2 e clorpirifós, como nocivo (classe 4. Já para a população larval de C. externa de Vacaria, benzoato de emamectina, metoxifenozide, etofenprox, tebufenozide e spinosad foram inofensivos; fosmet mostrou-se moderadamente nocivo (classe 3 e clorpirifós foi nocivo.The effect of some insecticides on larvae of two populations of Chrysoperla externa (Hagen, 1861 (Neuroptera: Chrysopidae from Bento Gonçalves and Vacaria, RS were evaluated under laboratory conditions (25±2°C, RH of 70±10% and 12 hours-photophase. The compounds were used at commercial or research concentrations used to control oriental fruit moth, leaf roller and fruit fly on apple orchards. The products and rates (g ou mL of formulated product/100L of water evaluated were: phosmet (Imidan 500 PM - 200, methoxyfenozide (Intrepid 240 SC - 60, tebufenozide (Mimic 240 SC - 60, emamectin benzoate (Proclain 5 SG - 15, spinosad (Tracer 480 SC - 20, etofenprox (Trebon 100 SC - 150 and chlorpyrifos (Lorsban 480 BR - 150, using water as control. Spraying of insecticides was on first-instar larvae using the Potter tower. The survival rate and duration, larval and pupal development time and, fecundity and fertility of survivor adults were evaluated. The toxic effect of each product was estimated by the total effect (E according to the IOBC recommendations. Emamectin benzoate was classified as harmless (class 1 to first-instar larvae of C. externa from Bento Gonçalves. Methoxyfenozide, etofenprox, tebufenozide, spinosad and phosmet were classified as slightly harmful (class 2, and chlorpyrifos was classified as harmful (class 4. Emamectin benzoate was harmless; fosmet was moderately harmful (class 3, and chlorpyrifos was harmful to the C. externa from Vacaria.

  16. Membrana de poli (L-CO-D, L ÁCIDO LÁTICO-CO-TMC (PLDLA-TMC (70/30 com aloe vera para ser usado como curativo no tratamento de queimadura

    Directory of Open Access Journals (Sweden)

    Newton Maciel de Oliveira

    2016-10-01

    Full Text Available Ao longo da história, muitos tratamentos diferentes e, por vezes bizarros, têm sido prescritos para queimaduras. Desde os tempos mais remotos até os dias atuais, existe a necessidade de buscar novas terapias e drogas que funcionem como agentes tópicos para aliviar a dor e controlar a infecção em queimaduras. Dessa maneira, uma alternativa interessante às drogas sintéticas é a utilização de plantas, como um recurso natural, as quais podem ser úteis para o desenvolvimento de novas formulações e estratégias para melhorar a qualidade de vida. Neste trabalho foi utilizado o terpolímero poli (L-co-D, L ácido lático-co-TMC (PLDLA-co-TMC como matriz polimérica para a fabricação do curativo, sendo misturado a esse curativo o extrato de Aloe Vera, uma planta tropical que pertence à família Liliaceae, sendo conhecida por ser a mais antiga planta medicinal na natureza, a qual exibe propriedades anti-cancerígena, anti-oxidante, anti-bacteriana, cicatrizante e anti-viral. Além disso, outra vantagem do uso destes materiais está relacionada ao custo, uma vez que os produtos atualmente disponíveis para o tratamento de queimaduras são importados e apresentam valor elevado, inviabilizando o uso em larga escala. Neste trabalho, o estudo in vivo foi realizado por meio de 30 animais (ratos Wistar, divididos em 02 grupos conforme o tempo dos curativos (7 dias e 15 dias. Cada um, por sua vez, foi subdividido em 03 grupos de acordo com o tratamento aplicado: um grupo controle (sem a membrana PLDLA-co-TMC, tratamento 1 (com a membrana PLDLA-co-TMC sem Aloe Vera e tratamento 2 (com a membrana PLDLA-co-TMC/Aloe Vera com concentração de 10%.

  17. Study of the raw materials used in the manufacture of ceramics in Fran Ali (Oued Laou, Marruecos); Estudio de materiales usados en la fabricacion de las ceramicas de Fran Ali (Oued Laou, Marruecos)

    Energy Technology Data Exchange (ETDEWEB)

    Barrios Neira, J.; Martin de la Cruz, J. C.; Montealegre Contreras, L.

    2012-11-01

    The thermal behaviour, mineralogy, texture and micro-structure of the original rocks used as raw materials in the manufacture of ceramics of the potter community in Fran Ali (Oued Laou, Tetouan, Morocco) were studied. The original rocks of the alteration deposit are metapelites and altered philites from the Units Malaguide-Gomaride in the Baetic-Rifian mountain system. The techniques used by local potters and the water used to prepare the ceramic bodies were also studied. Original rocks are metapelites or filadios and raw materials belong to levels caused by exogenous or supergene alteration (quartz-illite and chlorite type clays). The ceramics studied by microscopy exhibit anisotropy. (Author) 15 refs.

  18. Produção de biocombustível alternativo ao óleo diesel através da transesterificação de óleo de soja usado em frituras

    Directory of Open Access Journals (Sweden)

    Costa Neto Pedro R.

    2000-01-01

    Full Text Available In this work, the utilization of used frying oil for the production of biodiesel is presented. The performance of biodiesel in diesel engines, as well as the characterization of the emissions derived from this process, are also discussed and compared to the emissions derived from engines running on unused vegetable oils and conventional diesel.

  19. Genetic algorithms used to optimize an artificial neural network design used in neutron spectrometry; Algoritmos geneticos utilizados para optimizar un diseno de red neuronal artificial usado en espectrometria de neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Arteaga A, T.; Ortiz R, J. M.; Vega C, H. R., E-mail: tarcicio70@yahoo.co.uk [Universidad Autonoma de Zacatecas, Av. Lopez Velarde 117, 98600 Zacatecas, Zac. (Mexico)

    2016-10-15

    Artificial neural networks (Ann) are widely used; it which consist of an input layer, one or more hidden layers and an output layer; these layers contain neurons and each has connections called weights, where the knowledge are allowed and let to Ann solve problems proposed. These Ann is used to reconstruction of the energy spectrum of neutrons from count rates and develop Bonner sphere neutron dosimetry. Currently, we have developed Ann with high performance and generalization ability. Determine your optimal architecture is usually a difficult task, an exhaustive search of all possible combinations of parameters is rarely possible further training of the neural network with random initial weights can cause two major drawbacks: it can stuck in local minima or converge very slowly. In this project it will be used Genetic Algorithms (Ga); which are based on the principle or analogy of evolution through natural selection and has shown to be very effective in optimizing complex search functions and large spaces or to find a near optimal overall efficiency. The aim is to decrease the architecture in number of hidden neurons and therefore the total number of connections is reducing. The benefits obtained by optimizing the network are that the number of connections would be considerably smaller and thus the computational complexity, hardware integration, resources will be lower such that will allow to be even more viable implemented. To use the Ga three problems must be solve: 1) coding the problem into chromosomes. 2) Construct a fitness function. 3) Proper selection of genetic operators; crossover, selection, mutation. As a result, the scientific knowledge obtained can to be applied to similar problems having a reference parameters used and their impact on the optimization would to be generated. It concluded that the input layer and output are subject to the problem; the Ga propose the optimal number of neurons in the hidden layer without losing the quality of the results. (Author)

  20. Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4

    Directory of Open Access Journals (Sweden)

    Julio Carlos Afonso

    2006-07-01

    Full Text Available This work describes a process for metal recovery from spent NiMo and CoMo/Al2O3 commercial hydrorefining catalysts. The samples were treated by fusion with potassium hydrogen sulfate (5 h, 600 ºC with a KHSO4/catalyst mass ratio of 10:1. After fusion the solid was solubilized in water (100 ºC, leaving silicon compounds as residue. Losses of nickel and cobalt may reach 16 wt% of the amount present in the sample, depending on the silicon content. Soluble metals were isolated by selective precipitation techniques (nickel, cobalt, aluminum or by solvent extraction with methyl-isobutyl ketone (molybdenum in a hydrochloric acid medium. All metals were recovered in very good yields except for nickel and cobalt in the presence of considerable amounts of silicon. Soluble wastes consist of potassium/sodium sulfates/chlorides. Solid wastes correspond to about 4 wt% of the catalyst and can be discarded in industrial dumps.

  1. Software Multimedia para la Enseñanza y Aprendizaje de Seis Medicamentos Homeopáticos Usados en Niños Cuando su Principal Síntoma es la Irritabilidad

    OpenAIRE

    Velásquez Echeverri, Ana Carolina

    2012-01-01

    El presente trabajo de grado se desarrolló en el marco de la modalidad producto para docencia y pedagogía. Su propósito fue la creación de una herramienta virtual para el aprendizaje y la enseñanza de seis medicamentos homeopáticos que presentan de forma predominante el síntoma irritabilidad en niños. Se propuso desde el análisis y la síntesis de diferentes materias médicas homeopáticas. Su desarrollo se fundamentó en las teorías del aprendizaje autónomo y significativo, y en un modelo ...

  2. Adhesive systems used for sealing contaminated surfaces: a microleakage evaluation Estudo de microinfiltração sob sistemas adesivos usados como selante em superfícies contaminadas

    Directory of Open Access Journals (Sweden)

    Rosa Helena Miranda Grande

    2005-03-01

    Full Text Available The aim of this study was to compare two adhesive systems (OptiBond FL TM and OptiBond SOLO TM used as a sole material for sealing pit and fissures on contaminated surfaces with respect to microleakage. After acid etching, 56 sound teeth were contaminated with 1 µl of plasma and randomly divided into 8 groups (n = 7. The adhesives were light activated under two conditions (Optilux VCL-403TM and VCL-500TM for 30 s. Each specimen was exposed to one of the following aging treatments: thermal (4,000 X at 5-55°C for 60 s plus load cycling (225,000 X with 83.3 N or thermal plus load and pH cycling (mineralizing/demineralizing solutions. Then, they were immersed in a 50% AgNO3 aqueous solution, sectioned twice and had dye penetration measured through digitized images. ANOVA methods were used to assess the main effects of the factors as well as their interactions. The results indicated a significant difference between the adhesive systems (p O propósito deste estudo foi comparar dois sistemas adesivos (OptiBond FL TM e OptiBond SOLO TM utilizados como material único para selar superfícies oclusais contaminadas com relação à infiltração marginal. Após condicionamento ácido, 56 dentes hígidos foram contaminados com 1 µl de plasma e aleatoriamente divididos em 8 grupos (n = 7. Os adesivos foram fotoativados por 30 s sob duas condições (Optilux VCL-403TM e VCL-500TM. Cada espécime foi exposto a um de dois tratamentos de envelhecimento: ciclos térmicos (4.000 x a 5-55°C por 60 s mais ciclos mecânicos (225.000 x com carga de 83,3 N; ou ciclos térmicos, mecânicos e de pH (soluções mineralizante/desmineralizante. Os espécimes foram imersos em solução aquosa de AgNO3 a 50%, secionados, e a penetração do corante foi medida em imagem digitalizada. Usou-se ANOVA para determinar os principais efeitos dos fatores e suas interações. Os resultados indicaram diferença significante entre os adesivos (p < 0,05, sugerindo que o OptiBond FL TM apresenta um desempenho melhor com relação à microinfiltração e poderia ser indicado como material único para selamento em condições de umidade ou contaminação acidental.

  3. Diminuição do teor de óxido de crômio (III usado como marcador externo Reduction in chromium (III oxide level as an external marker

    Directory of Open Access Journals (Sweden)

    Hermann Bremer Neto

    2003-04-01

    Full Text Available A sensibilidade do método espectrofotométrico da s-difenilcarbazida de determinação do crômio permite que esse metal possa ser determinado em teores e em massas de amostras tão pequenas que as concentrações atualmente usadas de óxido de crômio (III como marcador externo em ensaios biológicos poderiam ser drasticamente diminuídas. Utilizando-se do piauçu (Leporinus macrocephalus para um estudo sobre o coeficiente de digestibilidade aparente (CDA da fração protéica, seis níveis de óxido de crômio (III - 0,01% - 0,02% - 0,03% - 0,05% - 0,1% e 0,2% - foram incorporados em dietas isoprotéica e isoenergética, objetivando-se verificar se o cálculo do CDA seria afetado pela variação do teor do marcador. Os seis tratamentos foram dispostos em um delineamento em blocos inteiramente casualisados, sendo as fezes coletadas durante 16 dias. Verificou-se que os resultados do coeficiente de digestibilidade aparente da fração protéica não apresentaram diferenças estatísticas significativas devidas aos teores incorporados do marcador à ração e aos dias de coleta. Conseqüentemente, e em experimentos dessa natureza, nada impede que seja reduzido o teor de óxido de crômio (III ao menos até 0,01%: além da economia relativa ao consumo do mesmo e da facilidade na manipulação de menor quantidade de amostras de fezes, o método espectrofotométrico da s-difenilcarbazida permite dosar esse nível (e até menor do que 0,01% de modo simples e rápido, com precisão e exatidão.The objective of this study was to reduce the level of the biological marker Cr2O3 in animal diets, due to the sensibility of the sdiphenylcarbazide spectrophotometric method for chromium determination in feces, recently developed. Six levels of marker, chromium (III oxide (0.01% - 0.02% - 0.03% - 0.05% - 0.1% and 0.2%, were incorporated into isoproteic and isoenergetic diets, for the apparent digestibility assay of the "piauçu" (Leporinus macrocephalus, in a design of entirely randomized groups. Feces were collected during sixteen days. The statistical analysis did not show significant differences in the apparent digestibility of the proteinic fraction due to the concentration levels of the marker incorporated into the diets and the collection days. Consequently, there is nothing to stop us from reducing Cr2O3 rate to at least 0.01% in these digestibility assays: spectrophotometry of sdiphenilcarbazide allows us to determine this level or even smaller levels in an accurate, simple, and quick manner.

  4. Study of accelerated aging of polymeric surge arresters and insulators used in high voltage lines; Estudo sobre o envelhecimento acelerado de para-raios e isoladores polimericos usados em linhas de alta tensao

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira Junior, Joao B. de; Castro Junior, Joao B. de; Silva, Maria Elisa S.R. e; Freitas, Roberto F.S.; Sousa, Ricardo G. de [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Dept. de Engenharia Quimica. Lab. Ciencia e Tecnologia de Polimeros; Souza, Breno P.G. de [CEMIG Distribuicao S.A., Belo Horizonte, MG (Brazil)], e-mail: sousarg@ufmg.br

    2011-07-01

    The use of polymeric materials in the electrical system has dramatically increased in recent years, in quantity as well as in quality. However, the use of these materials has been very empirical, being necessary a more directed and well based study towards their application in energy sector, especially concerning their early deterioration. In this study, the behavior of some surge arresters and insulators, used in power lines, after suffering aging artificial weathering chamber, was investigated. The absorption spectra in the infrared (FTIR) was used as analytical technique for study of aging. Of the five samples tested, only one showed an oxidation process after 1500 hours of artificial weathering. (author)

  5. Final report of the project 'Regeneration of activated carbon used in residual water treatment plants'; Informe final del proyecto 'Regeneracion de carbon activado usado en plantas de tratamiento de aguas residuales'

    Energy Technology Data Exchange (ETDEWEB)

    Martinez M, I; Hernandez M, V

    1992-01-15

    Among the new methods used to reactivate carbon, its are the one that uses infrared light and the one that uses accelerated electrons. The technology in both processes is novel, the energy is used but efficiently, it doesn't get lost but of 5% of carbon and its are less polluting. This report presents the one method and results obtained in the irradiation of coal. (Author)

  6. Valor nutricional do milho termicamente processado, usado na ração pré-inicial para frangos de corte Nutritional value of heat processed corn in formulating broiler pre-starter diet

    Directory of Open Access Journals (Sweden)

    E.R. Freitas

    2005-08-01

    Full Text Available Foram conduzidos um ensaio de metabolismo para determinar o valor nutricional do milho termicamente processado (MP e não-processado (MNP e outro de desempenho para comparar o uso desses alimentos em dietas pré-iniciais para frangos de corte. Não foram observadas diferenças entre a digestibilidade da matéria seca (MS, do extrato etéreo, da proteína bruta e do amido e valores de energia metabolizável aparente dos tipos de milho avaliados. A energia metabolizável aparente corrigida do MP (3.537kcal/kg de MS foi maior (PA digestibility trial was carried out to evaluate the nutrient digestibility of heat-processed corn (PC and not processed corn (NPC. A trial was also carried out to evaluate the effect of PC and NPC in pre-starter diet on broiler performance from 1 to 42 days of age. The dry matter (DM, ether extract, crude protein and starch digestibilities and apparent metabolizable energy for PC were similar (P>0.05 to those observed for NPC. The corrected apparent metabolizable energy of PC (3,537kcal/kg of DM was higher than NPC (3,411kcal/kg of DM. The treatments in the performance trial were T1- diet formulated with NPC, T2- diet formulated with PC, and T3 - isometric substitution of NPC for PC in T1 diet. The broiler fed on NRC diets showed lower feed consumption and weight gain:feed consumption ratio from 1 to 7 days of age than broiler fed on PC diets. The isometric substitution of NPC for PC in the pre-starter diet did not affect the performance of birds. No treatment effect on broiler performance from 1 to 42 days of age was also observed.

  7. Diseño e implementación de un sistema de adquisición y monitoreo de datos (shm para un rectificador de protección catódica usado en ductos.

    Directory of Open Access Journals (Sweden)

    Daniel Alejandro Rodríguez-Caro

    2016-01-01

    Full Text Available Background:Cathodic protection by impressed current is one of the methods to prevent corrosion of pipes or tanks, preserving the structural state and integrity of the material. For a cathodic protection system to function properly there must to be a control over the electrical variables involved in the process, which is why it is necessary to monitor variables such as (voltage, current and potential protection. Objective: to develop a system of data acquisition and monitoring in real time, in order to increase accessibility to electrical variables and thus improve the operation of the cathodic protection system. Methods: The monitoring and information analysis system is based on the concept of SHM (Structural Health Monitoring, which consists of an electronic system for remote acquisition and sending of signals (micro controller and GSM communications system and a system for visualization and analysis of information in a mobile system (cell using a web server for it. Given that the condition of structural integrity of the pipeline is determined by the correct operation of the rectifier. Results: It was possible to implement a monitoring and remote viewing system of the main variables of a cathodic protection system. An algorithm based on the concept of SHM was developed, allowing to correlate, generate trend and establish performance criteria for the cathodic protection system which allows to establish whether the system is ensuring the structural integrity of the crude transportation pipeline. Conclusion: the novelty of this work is to show the real-time behavior of the variables needed to analyze whether the pipeline is being properly protected and generate alarms and reports regarding cathodic protection, which is based on the concept of SHM (Structural Health Monitoring.

  8. Sliding wear of steels (used in polished rods of oil pump jack) against polyurethane; Desgaste de deslizamento de acos (usados em hastes de unidade de bombeio de petroleo) contra poliuretano

    Energy Technology Data Exchange (ETDEWEB)

    Gois, Gelsoneide da Silva [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Engenharia de Materiais; Farias, Aline Cristina Mendes; Lima da Silva, Ruthilene Catarina; Medeiros, Joao Telesforo Nobrega [Universidade Federal do Rio Grande do Norte (PPGEM/UFRN), Natal, RN (Brazil). Programa de Pos-Graduacao em Engenharia de Materiais], e-mail: gelsoneidegg@yahoo.com.br, e-mail: alineastro@yahoo.com.br, e-mail: ruthilene@ufrnet.br, e-mail: medeirosj2@asme.org

    2008-07-01

    Accelerated sliding tests were carried out in the steels AISI 316, AISI 4140, AISI 1045 coated and AISI 4142 coated, in the dry and lubricated with contaminated oil with 10% SiO{sub 2} conditions. Each cylindrical counterbody with angular generatrix of polyurethane slid against a stationary metallic specimen. The contact pressure changed by increment of normal loads of 10,0 and 2,3 N, velocity of 0,91 m/s and distance of 12 km. The wear rates were calculated through of the mass variation from specimens after each test. The wear morphology was characterized by Optical and Scanning Electron Microscopy, where identified damages by abrasion at two and three bodies. The contaminated lubricant increase the wear rate due to action of the abrasive particles. (author)

  9. Study of residual stresses in welded joints of dual phase HSLA steel used in automotive industry; Estudo das tensoes residuais em juntas soldadas de aco ARBL bifasico usado na industria automobilistica

    Energy Technology Data Exchange (ETDEWEB)

    Barbato, D.S.; Fonseca, M.P. Cindra; Marques Junior, A.S.; Chuvas, T.C.; Pardal, J.M., E-mail: mcindra@vm.uff.b [Universidade Federal Fluminense (PGMEC/UFF), Niteroi, RJ (Brazil). Programa de Pos-graduacao em Engenharia Mecanica; Berretta, J.R. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2010-07-01

    One way of weight reduction in automotive vehicles is through the use of high strength and low alloy (HSLA) steels, which enables the use of small thickness plates. Whereas the appearance of residual stresses is intrinsic to the welding process, this study evaluates the residual stresses generated in welded joints obtained by TIG and LASER welding processes and comparing them. Residual stresses were measured by X-rays diffraction technique, using a portable device with Cr{kappa}{alpha} radiation applying the double exposure method. It also evaluates the influence of shot peening treatment applied after welding, in the bend tests conducted for both welding conditions and TIG welded joints showed higher stability of compressive stresses after welding. The metallographic analysis by optical microscopy complemented the welded joints characterization. (author)

  10. Ionic implantation by plasma in titanium and stainless steels used in prosthesis and medical instruments; Implantacion ionica por plasma en titanio y aceros inoxidables usados en protesis e instrumental medico

    Energy Technology Data Exchange (ETDEWEB)

    Munoz C, A. E. [ININ, 52750 La Marquesa, Estado de Mexico (Mexico)

    2008-07-01

    A study of a process known as plasma immersion ion implantation (PIII) of nitrogen at low voltages (< 4 kV) into three kind of samples: 1) austenitic stainless AISI 316-L steel plates, 2) ferritic stainless AISI 434 steel-based dentistry drills and 3) commercially pure titanium (CPTi) disks. On the case of CPTi the study was conducted in nitrogen- oxygen calibrated mixtures: 90% N-10% O, 80% N-20% O, 70% N-30% O and in 99.5% pure oxygen and 99.9% pure nitrogen. The PIII process was carried out by using a direct current plasma source controlled both in voltage and current, a negative voltage pulse modulator, a stainless AISI 304 steel vacuum chamber and a rod of the same material, horizontally located in the upper region of the chamber, which plays the role of anode in the plasma discharge. The purpose of the nitriding is forming a relatively thick layer on the surface of the steel specimens in order to enhance their both microhardness and general corrosion performances, desirable in medical applications. This layer contains interstitial nitrogen atoms ({approx}24% at.) which gives place to a deformed lattice (expanded phase) of the steel. Vickers microhardness and potentiodynamic tests (the latter in agreement to the norm ASTM G-61-89) confirm an increase of microhardness up to three times and a decrease of general corrosion rate in one order of magnitude. The nitriding of de dentistry drills is aimed at inhibiting the pitting corrosion produced by the asepsis process which results in pit nucleations, their propagation and consequent fractures when being under cyclic stress (fatigue). Scanning electron microscope micrographs reveal the risks involved in surpassing the critical treatment simple temperature of 450 C as the PIII process itself induces pitting. On its part, cyclic (ASTM G-61) potentiodynamic tests indicate an excellent pitting corrosion resistance of the samples treated under 450 C. In turn, the treatment of CPTi was meant to develop oxidized and/or nitrided replacement layers of high biocompatibility in the form of rutile phase titanium oxide, which favours the bony-integration, along with enhanced wear resistance layers of improved microhardness. The superficial treatments of titanium largely succeed in these purposes both as for microhardness and for most parameters of the biological environment corrosion (simulated in a Hanks solution), surpassing the performance of conventional prosthetic metals, as reported in the current literature, including the Co-Cr-Mo alloy as to its wear resistance. (Author)

  11. Aging and characterization of PVC compound used as flat-panel of a low cost solar collector; Envelhecimento e caracterizacao de compostos de PVC usado em placas de coletores solares de baixo custo

    Energy Technology Data Exchange (ETDEWEB)

    Prado, Bruna R.; Pinto, Tatiana T.; Bartoli, Julio R. [Depto. de Tecnologia de Polimeros, Faculdade de Engenharia Quimica/Universidade Estadual de Campinas. FEQ/UNICAMP, SP (Brazil)], e-mail: bartoli@feq.unicamp.br; Fernandes, Elizabeth G. [Tezca P and D Celulas Solares (Brazil)

    2011-07-01

    Regardless the excellent amount of solar irradiation in Brazil, the development and production of solar water heating systems did not reach the low-income families yet. The relatively high cost of conventional solar water heaters is still the main reason to prevent it. The development of a low cost solar water heater (around US$ 200), easy technology, was the scope of previous work. All-plastic solar collector prototypes were developed using unplasticized Poly (vinyl chloride) ceiling panels and tubes, commodities from building engineering. Nevertheless, the main thermal and photo degradation mechanisms for PVC are well known; the unusual application of PVC as solar collector materials should need a specific investigation on environmental aging. This work presents a study on outdoor aging and characterization of PVC flat-plate absorber of solar collectors after 5 years on use. (author)

  12. Comportamento e impacto ambiental de antibióticos usados na produção animal brasileira Performance and environmental impact of antibiotics in animal production in Brazil

    Directory of Open Access Journals (Sweden)

    Jussara Borges Regitano

    2010-06-01

    Full Text Available Antibióticos têm sido utilizados em grandes quantidades nas criações animais. Muitas dessas moléculas não são totalmente metabolizadas no organismo animal e seus resíduos têm sido detectados em amostras de solo, água superficial e subterrânea. A ocorrência desses resíduos no ambiente pode favorecer a resistência de microrganismos aos agentes antibióticos, além de causar problemas de ordem toxicológica a determinados organismos vivos. Os antibióticos de uso veterinário são, no geral, representados por moléculas anfóteras, com vários grupos funcionais ionizáveis (diferentes valores de pKa, massas molares bastante variáveis (172 a 916 g mol-1 e baixos potenciais de volatilização (pressão de vapor Antibiotics are used in large quantities in livestock. Many of these molecules are not fully metabolized by the animals, leaving detectable residues in soil, surface water and groundwater samples. The occurrence of these residues in the environment can favor microorganism resistance to antibiotic agents, in addition to toxic effects on certain living organisms. In general, veterinary antibiotic molecules are amphoteric with many ionizable functional groups (different pKa values, rather variable molar masses (172 to 916 g mol-1 and low volatilization potential (vapor pressure < 1.1 x 10-11 mm Hg. In comparison to pesticides, these compounds have higher water solubility (Sw and lower methanol-water partition coefficients (log Kow, probably due to the presence of many ionizable functional groups, resulting in lower bioaccumulation and higher mobility potential in soils. The purpose of this paper was to evaluate antibiotic uses and importance of livestock in Brazil, to review their environmental fate in temperate climate, and finally to emphasize the need for research on the occurrence and behavior of these molecules in the predominantly highly weathered soils of tropical regions.

  13. Estimates of relative doses of {sup 106}Ru/{sup 106}Rh of spherical applicators used in ophthalmic brachytherapy; Estimativas de doses relativas de aplicadores esfericos de {sup 106}Ru/{sup 106}Rh usados em braquiterapia oftalmologica

    Energy Technology Data Exchange (ETDEWEB)

    Paiva, Eduardo de, E-mail: edup2112@gmail.com, E-mail: epaiva@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Div. de Fisica Medica

    2016-11-01

    Spherical ophthalmic applicators containing the beta emitter {sup 106}Ru / {sup 106}Rh are much used in brachytherapy for the treatment of various eye diseases. However, there is great difficulty in dosimetry these sources because of its geometric shape, the short range of the beta particles and the large dose gradient, and because of that calculation methods of dose distributions around these sources take on a great importance. In this work an analytical / numerical method is used to estimate the dose rates for a function of depth for spherical sources containing {sup 106}Ru / {sup 106}Rh. The results of the doses on along the central axis for applicators models CXS, CCX, CCY, CCZ, CCD and CGD and CCC are compared with published values calculated by Monte Carlo simulation and measurement results.

  14. Estudio de gráficos estadísticos usados en una muestra de libros de matemáticas para la educación básica y media en Bogotá

    OpenAIRE

    Mateus , Leidy

    2014-01-01

    A continuación se expone un ejemplo del estudio de los gráficos estadísticos que aparecen en una muestra de 5 libros de matemáticas, diseñados para la enseñanza en la educación básica y media y publicados en los últimos 50 años en Bogotá. Inicialmente con 1.013 libros revisados y mediante criterios de reducción, organización y sistematización de la información, nos brinda una muestra significativa por décadas de 5 libros. Con relación a los gráficos de la muestra de libros, se elaboró un cont...

  15. Final report of the project 'Regeneration of activated carbon used in residual water treatment plants'; Informe final del proyecto 'Regeneracion de carbon activado usado en plantas de tratamiento de aguas residuales'

    Energy Technology Data Exchange (ETDEWEB)

    Martinez M, I.; Hernandez M, V

    1992-01-15

    Among the new methods used to reactivate carbon, its are the one that uses infrared light and the one that uses accelerated electrons. The technology in both processes is novel, the energy is used but efficiently, it doesn't get lost but of 5% of carbon and its are less polluting. This report presents the one method and results obtained in the irradiation of coal. (Author)

  16. Hydrodynamic calculation of a filter sand bed type used in the containment venting systems; Calculo hidrodinamico de un filtro tipo lecho de arena usado en los sistemas de venteo de la contencion

    Energy Technology Data Exchange (ETDEWEB)

    Cuevas V, D.; Sainz M, E.; Ortiz V, J., E-mail: delfy.cu@gmail.com [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2015-09-15

    The filtered venting of the containment has been adopted in European countries to mitigate the consequences of excess pressure containment during a severe accident. When venting has taken place, the fission products are released directly into the environment, unless a filter on the same path is placed, so that various types of filters are used to trap the fission products. The venting filters of the containment currently installed use different filtration technologies that involve more than one medium. Those using water as the first stage of filtration are called wet systems and are equipped with additional steps to remove water drops and fine aerosols emissions. And even they may also be equipped with an element containing certain absorption means for the filtration of gaseous iodine species. Other designs based on filtration of deep bed as the primary retention step; called dry filters, use filtration media of metal fiber, ceramic or sand to trap aerosols. This paper evaluates the hydraulic characteristics of the filter sand bed type designed by EDF as a candidate to be installed in the containment of BWR Mark II (type of primary containment of the nuclear power plant of Laguna Verde). The evaluation of filter sand bed type was performed using the software package of open source OpenFOAM. Models of each zone of the filtered device were generated and through a series of parametric calculations of computational fluid mechanics relevant hydrodynamic characteristics of the device were obtained, such as pressure drops against mass flow rate and pressure fields and speed at different operating conditions. On the other hand, the model validation of the sand bed filter when comparing the results of experimental tests on a sand column of PITEAS program (1985-1986) against OpenFOAM simulation was realized. The results are very close to those obtained experimentally. (Author)

  17. Hydrodynamic calculation of a filter washing in liquids type used in containment venting systems; Calculo hidrodinamico de un filtro tipo lavado en liquidos usados en los sistemas de venteo de la contencion

    Energy Technology Data Exchange (ETDEWEB)

    Reyes G, A. A.; Sainz M, E.; Ortiz V, J., E-mail: alejandroantonioreyess@gmail.com [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2015-09-15

    From the nuclear accident of Chernobyl, the European nuclear power plants have chosen to install filters on the venting pipes of the containment, whose function is to help to mitigate the consequences of a severe accident, by controlled depressurization of the containment passively through a filtered venting of the containment system. These systems are designed to relieve the internal pressure of the containment by means of the deliberate opening of pressure relief devices, either a valve or rupture disc during a severe accident and be channeled to the filter unit. In this paper the hydraulic response of a filter system of gases washing by liquid is evaluated, due to this information is necessary to estimate the effect that has the pressure increase of the contention on the discharge capacity of the venting pipes. By simulation of computational of fluid dynamics with the programs: CAELINUX-2014 and OpenFOAM, the hydrodynamic characteristics of the Multi Venturi System for gases washing from the containment, which could be included in the general model of the venting pipe, were obtained. Representative models of the Venturi tubes of each concentric area that forming the washing system were generated; and using parametric calculations the average mass flow rate established through each venturi, depending on its size and depth in which it is located inside the tank was estimated. Also, the pressure and mass flow rate required to activate each concentric area depending on the pressure and mass load from the containment were calculated, to estimate the maximum flow that is established through the filter. Finally, the velocity profiles and the characteristic pressure at which each area operates as well as the pressure drop of local and global discharge also were calculated. (Author)

  18. Side Effects of Fungicides Used in Cucurbitaceous Crop on Trichogrammaatopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae Efectos Secundarios sobre Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogramatidae de Fungicidas usados en Cucurbitáceas

    Directory of Open Access Journals (Sweden)

    Dirceu Pratissoli

    2010-06-01

    Full Text Available Trichogramma spp. (Hymenoptera: Trichogrammatidae can control Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae. On the other hand, pesticides may reduce the efficiency of natural enemies. The objective was to evaluate the side-effects of fungicides used in the production of cucurbitaceous crops on Trichogramma atopovirilia Oatman & Platner parasitizing D. hyalinata eggs. The fungicides used in bioassays were: azoxystrobin (0.08 g active ingredient [ai] L-1, chlorothalonil (2.00 g ai L-1, mancozeb (1.60 g ai L-1, tebuconazole (0.25 g ai L-1 and thiophanate-methyl (0.49 g ai L-1. Cardboards with 30 D. hyalinata eggs previously immersedin fungicide solutions and distilled water (control were offered separately to 20 newly emerged T. atopovirilia females in glass tubes. Parasitism, parasitism reduction, emergence, sex ratio, and number of individuals per egg were evaluated. The fungicides chlorothalonil, thiophanate-methyl and tebuconazole reduced parasitism of T. atopovirilia by 43.37, 27.64 and 18.51%, respectively. However, parasitism with azoxystrobin (79.21% was higher than the control (67.37% (P ≤ 0.05. Chlorothalonil, thiophanate-methyl and tebuconazole reduced emergence by 73.77, 75.62 and 79.35% (P ≤ 0.05, respectively. Azoxystrobin and thiophanate-methyl reduced the sex ratio by 0.77 and 0.76 (P ≤ 0.05, respectively. Fungicides did not reduce the number of individuals per egg. The fungicides azoxystrobin and mancozeb were selective for T. atopovirilia for most studied parameters suggesting that these products must have the priority in crop disease management to allow efficient biological control of T. atopovirilia against D. hyalinata.Trichogramma spp. (Hymenoptera: Trichogrammatidae pueden controlar Diaphania hyalinata Linnaeus (Lepidoptera: Pyralidae. Sin embargo, los plaguicidas pueden reducir la eficiencia de los enemigos naturales. El objetivo de este trabajo fue evaluar la influencia de los fungicidas utilizados en la producción de cucurbitáceas en Trichogramma atopovirilia Oatman & Platner sobre huevos de D. hyalinata. Se evaluaron los fungicidas azoxystrobina (0.08 g ingrediente activo [ia] L-1, clorotalonil (2.00 g ia L-1, mancozeb (1.60 g ia L-1, tebuconazole (0.25 g ia L-1 and tiofanato-metil (0.49 g ia L-1. Tarjetas con 30 huevos de D. hyalinata previamente sumergidos en los fungicidas y en agua destilada (control fueron ofrecidas a 20 hembras de T. atopovirilia con hasta 24 h de emergencia individualizadas en tubos de vidrio. Se evaluó parasitismo, reducción de parasitismo, emergencia, proporción sexual en la población y el número de individuos emergidos por huevo. Los fungicidas clorotalonil, tiofanato-metil y tebuconazol redujeron el parasitismo de T. atopovirilia en 43,37; 27,64 y 18,51%, respectivamente. Sin embargo, el parasitismo con azoxistrobina (79,21% fue mayor que el control (67,37% (P ≤ 0,05. Clorotalonil, tiofanato-metilo y el tebuconazol redujo la aparición de 73,77, 75,62 y 79,35% (P ≤ 0,05, respectivamente. Azoxistrobina y tiofanato-metil reduciran la proporción de sexos de 0,77 y 0,76 (P ≤ 0,05, respectivamente. Ninguno de los fungicidas redujo el número de individuos por cada huevo. Los fungicidas azoxistrobina y mancozeb fueron selectivos para T. atopovirilia en la mayoría de los parámetros estudiados, por lo tanto, deberían tener prioridad en el manejo de enfermedades de cucurbitáceas para permitir el uso eficiente de los enemigos naturales de D. hyalinata.

  19. Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Guevara Chávez

    Full Text Available Resumen Las aleaciones de Fe-Cr-Mo se utilizan en recubrimientos para proteger componentes que están sometidos a condiciones de desgaste y corrosión. La alta velocidad de deposición del metalizado térmico (HVOF (High Velocity Oxi-Fuel aplicado en aleaciones de acero grado herramienta para trabajo en frío con la aplicación de sustratos Fe-Cr-Mo ha mostrado buenos resultados en los campos de proyección. El HOVF es un método atractivo para aplicar revestimientos y recuperar diámetros que fueron desgastados durante el proceso de operación. Nuevas superficies y materiales pueden ser provistos sin la distorsión causada por los procesos convencionales de soldadura. Para aquellos materiales que son susceptibles a agrietarse gracias a la formación de fases fuera de equilibrio duras con composiciones con altos contenidos de carbono y de cromo, debido a las condiciones del proceso que combinan una temperatura de la flama relativamente baja y con un tiempo de baja exposición. La microestructura las características del recubrimiento son determinadas por las propiedades físicas y químicas de las partículas impregnadas en el sustrato que a su vez dependen de una gran cantidad de parámetros como el diseño de pistola, la relación de oxígeno / combustible, método de inyección, tamaño de partícula y forma, entre otros La presente investigación estudia la influencia de los parámetros de procesamiento sobre las propiedades mecánicas y microestructurales del recubrimiento Diamalloy 1008 (aleación en mezcla de Fe-Cr-Mo revestimiento aplicado con Oxí-combustible de alta velocidad (HVOF y cinco diferentes tipos de electrodos aplicados por soldadura, TIG (GTAW en un acero grado herramienta para trabajo en frio. El objetivo de estos recubrimientos se utiliza habitualmente como una protección contra la corrosión y el desgaste, pero también tienen la capacidad de recuperar las zonas dañadas como es el caso de los dados de estampado de la industria automotriz. Las muestras se caracterizaron mediante microscopía óptica y electrónica de barrido para evaluar la calidad del material depositado en el sustrato; microdureza Vickers y Pin-Ball Disc se utilizaron para cuantificar las propiedades mecánicas de los recubrimientos.

  20. Evaluation of ultrasound inspection of steel H K-40 tubes used in oil processing plant furnaces; Avaliacao da inspecao ultra-sonica de tubos de aco HK-40 usado em fornos de plantas de processamento de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Staszczak, Eduardo Jose; Rebello, Joao Marcos Alcoforado; Riguera, Glaucio [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia. Lab. de Ensaios Nao-Destrutivos; Martins, Marcus Vinicius M.; Carneval, Ricardo de Oliveira [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas

    2003-06-01

    The ultra-sound inspection is usually an alternative to the techniques used for the inspection of tubes of steel H K-40. Even so up to now it was not very analyzed it remains so much to real potentiality of the technique in what it refers to the minimum size of discontinuities for its detection with relationship to the characterization of the size of discontinuities and the respective ultra-sound signal. This work besides reviewing fundamental aspects of the problems of inspection of these tubes tries to relate the form of the ultra-sound signal with the size of the found discontinuities. (author)

  1. Dados e informações usados na tomada de decisão em bibliotecas universitárias brasileiras : o contexto da atividade de desenvolvimento de coleções

    OpenAIRE

    Rejane Raffo Klaes

    1991-01-01

    Foi realizado um estudo de caráter expioratório-descritivo para verificar o uso dos dados e estatísticas coletados regularmente pelas bibliotecas universitárias brasileiras no processo decisório dentro da atividade de desenvolvimento de coleções. Tendo como base a abordagem sistêmica, a biblioteca universitária foi classificada como uma organização social de serviço em constante interação com o meio ambiente. A função e os objetivos da universidade e da biblioteca universitária, as necessidad...

  2. ANÁLISE DA ABORDAGEM HISTÓRICA PARA A TABELA PERIÓDICA EM LIVROS DE QUÍMICA GERAL PARA O ENSINO SUPERIOR USADOS NO BRASIL NO SÉCULO XX

    Directory of Open Access Journals (Sweden)

    Helena S. A. Leite

    2015-05-01

    Full Text Available The aim of this paper was to analyze the historical approaches to the periodic table in general chemistry textbooks used in Brazilian universities in the twentieth century. Textbooks were qualitatively analyzed according to the following criteria: position of the discussion about the periodic table in the book; presence or absence of a specific chapter on the subject; presentation of attempts to classify chemical elements before Mendeleev; presentation of the construction process of the periodic table by Mendeleev; identification of problems in the original table; discussion of Mendeleev's predictions about unknown elements; organization of the periodic table; periodic properties presented and discussed; and the enunciation of the periodic law. The analysis revealed different approaches at specific periods of the twentieth century, from more descriptive approaches to emphasis on attempts to explain the periodic table in terms of atomic orbitals. These changes point to different ways of understanding chemistry during the period studied.

  3. Adaptação à cultura brasileira dos questionários The O'Leary-Sant e PUF, usados para cistite intersticial Adaptación a la cultura brasileña de los cuestionarios The O'Leary-Sant y Puf, usados para cistitis intersticial Adaptation of the O'Leary-Sant and the PUF for the diagnosis of interstitial cystitis for the Brazilian culture

    Directory of Open Access Journals (Sweden)

    Marcella Lima Victal

    2013-04-01

    Full Text Available O objetivo deste estudo foi traduzir e adaptar à cultura brasileira os instrumentos The O'Leary-Sant e PUF, utilizados no diagnóstico de cistite intersticial. Foram realizadas as etapas metodológicas recomendadas pela literatura internacional para a adaptação cultural. As etapas de tradução, síntese das traduções e retrotradução foram realizadas satisfatoriamente, e a avaliação das versões sintéticas pelo comitê de especialistas resultou em algumas alterações, assegurando as equivalências entre as versões originais e traduzidas. O PUF foi pré-testado entre 40 sujeitos e The O'Leary-Sant em uma amostra de 50 indivíduos, devido à necessidade de ajustes em decorrência da baixa escolaridade da população. O processo de tradução e adaptação foi realizado com sucesso e os instrumentos, após as modificações, demonstraram ser de fácil compreensão e rápido preenchimento. Entretanto, este é um estudo que antecede o processo de validação e será premente o emprego do instrumento em novas pesquisas para que sejam avaliadas suas propriedades psicométricas.Se objetivó traducir y adaptar a la cultura brasileña los instrumentos The O'Leary-Sant y PUF, utilizados para diagnosticar cistitis intersticial. Fueron efectuadas las etapas metodológicas recomendadas por la literatura internacional para adaptación cultural. Las etapas de traducción, síntesis de traducciones y retrotraducción se realizaron satisfactoriamente, la evaluación de las versiones sintetizadas por parte del comité de especialistas derivó en algunas alteraciones, asegurando las equivalencias entre versiones originales y traducidas. El PUF fue pre-testeado con 40 sujetos y The O'Leary-Sant en muestra de 50 individuos, por la necesidad de ajustes derivados de la baja escolarización de la población. El proceso de traducción y adaptación se efectuó con suceso y los instrumentos luego de las modificaciones demostraron ser de sencilla comprensión y rápido completado. Sin embargo, este estudio es previo al proceso de validación, será imprescindible el uso del instrumento en nuevas investigaciones para evaluar sus propiedades psicométricas.The aim of this study was to translate and adapt the instruments known as The O'Leary-Sant and PUF to the Brazilian culture used in the diagnosis of interstitial cystitis. We followed the methodological steps recommended by the international literature for cultural adaptation. The steps of translation, synthesis of translations and back translation were performed satisfactorily and evaluation the versions of the synthesis by the panel of experts has resulted in some changes, ensuring the equivalence between the original and translated versions. The PUF was pretested among 40 subjects and The O'Leary-Sant in a sample of 50 individuals due to the need for adjustments due to the low education population. The translation and adaptation process was successful and the instruments, after some modifications, proved easy to understand and complete quickly. However, this is a study prior to the validation process and will be promoting the use of the instrument in new research to assess its measurement properties.

  4. Validação de um modelo teórico usado no cuidado da família que tem um filho com cardiopatia Validación de un modelo teórico usado en el cuidado de la familia con un hijo con cardiopatia Validation of a theoretical model applied on the care of families with a child with cardiopathy

    Directory of Open Access Journals (Sweden)

    Yelma Jacob

    2006-09-01

    Full Text Available Validar o modelo teórico"Buscando preservar a integridade da unidade familiar"; aplicando-o à situação da família que vivencia a situação. A coleta de dados decorreu por meio de entrevistas com seis familiares que vivenciaram a experiência de ter um filho que sofreu uma intervenção cirúrgica cardíaca, cujas perguntas foram pautadas no referido modelo, tendo como foco a experiência familiar, durante o tempo da cirurgia cardíaca. Os dados gerados foram analisados de acordo com a Teoria Fundamentada nos Dados. Pela análise comparativa dos resultados dos dois estudos, foi possível validar o modelo teórico para a experiência da família que vivencia a cirurgia cardíaca do filho. Em função da natureza específica da experiência, dois novos temas emergiram: vivendo uma experiência solitária e tendo superado uma etapa, ampliando o modelo teórico original.Validar el modelo teórico "Buscando preservar la integridad de la unidad familiar"; aplicándolo a la situación de la familia que vivencia la situación de cirugía cardiaca de un hijo. La recolección de datos se llevó a cabo por medio de entrevistas a seis familiares que vivenciaron la experiencia de tener un hijo que sofrió una intervención quirúrgica cardiaca, cuyas preguntas fueron basadas en el referido modelo, teniendo como foco la experiencia familiar, durante el tiempo de la cirugía cardiaca. Los datos generados fueron analizados de acuerdo con la Teoría Fundamentada en los Datos. Resultados - Por el análisis comparativo de los resultados de los dos estudios, fue posible validar el modelo teórico para la experiencia de la familia que vivencia la cirugía cardiaca del hijo. En función de la naturaleza específica de la experiencia, emergieron dos nuevos temas: viviendo una experiencia solitaria y habiendo superado una etapa, ampliando así el modelo teórico original.This article is based on a survey aimed at validating the theoretical model "Trying to preserve the integrity of the family unit" by applying it to the situation of families living through the experience of having a child undergoing heart surgery. Data was collected through interviews with six family members who had gone through that experience. The questions were laid out according to the model, focusing on the family experience during the time of heart surgery. The data was analyzed according to the Grounded Theory. Results showed that it is possible to validate the theoretical model for the experience of families who had a child undergoing heart surgery through the comparative analysis of the results of both studies. Because of the specific nature of the experience, two new themes emerged: living a lonely experience and overco-ming a phase, thus widening the original theoretical model.

  5. Rising trade, declining stocks: The global gugul (Commiphora wightii) trade.

    Science.gov (United States)

    Cunningham, A B; Brinckmann, J A; Kulloli, R N; Schippmann, U

    2018-05-07

    Commiphora wightii is exploited in India and Pakistan for an oleo-resin (gum guggul) traditionally used in Ayurvedic, Siddha and Unani medical systems. Processed C. wightii oleo-resin products are exported from India to 42 countries, including re-export to Pakistan, for anti-inflammatory use and as an anti-inflammatory and an anti-obesity treatment considered to lower cholesterol and lipid levels. The C. wightii export trade has particular relevance to the European Union because Belgium, France, Germany, Hungary, Italy, the Netherlands, and United Kingdom are importing countries. Demand and prices for C. wightii oleo-resin are increasing and wild stocks of C. wightii are in decline. The overexploitation of C. wightii after tapping for its commercially valuable oleo-resin is not a new problem, however, but one that has existed for over 50 years. Lopping and chopping trees to extract C. wightii oleo-resin has had a devastating impact on C. wightii populations since the 1960's. The aim of this study was to review the sustainability of the global trade in C. wightii oleo-resin. This included reviewing studies on resin tapping methods and the impacts of wild harvest on C. wightii populations in India and Pakistan. Firstly, we reviewed studies on impacts of C. wightii oleo-resin harvest and on the policy responses taken in relation to harvest and trade in C. wightii oleo-resin. Secondly, we reviewed studies on C. wightii cultivation. Thirdly, global trade data for C. wightii were analyzed. Destructive harvest to obtain the gum is the major threat facing this species. C. wightii populations are also fragmented by habitat loss through clearing for farming. Cutting and lopping in order to extract the medicinal gum are a major threat to C. wightii populations, as is poor recruitment due to grazing by livestock. As a result of over-exploitation, C. wightii oleo-resin production has declined in India. In Gujarat, a key production area, the decline over a 50-year period has

  6. Ethanol pilot project: an energy alternative project for a total or partial substitution of fuel oil in thermoelectric generation plants; Projeto piloto do etanol - PPE: alternativa energetica para substituicao parcial ou total do oleo combustivel em plantas de geracao termoeletrica

    Energy Technology Data Exchange (ETDEWEB)

    Pessoa, Joao Simoes

    2004-07-01

    The actual stage of technological development is strongly dependent on wide use of petroleum combustibles, in which its trade market defines the rules of socio economical and geopolitics interdependencies. The economic growth has been driven by the 'readily available - cheap energy' stimulus, limiting studies on natural sources of energy (geothermal, solar) and development of renewable ones (bio combustibles). However, economical, financial crisis may change this scenario, and new opportunities for a change in the technological matrix and in technological structure might occur. In Brazil, the 'Agenda 21', especially the PPA - Applied Research Program in the Energetic Area, intend to develop case studies and implement 'pilots projects' to research conventional and renewable sources of energy, bringing to present the value of this project, developed between 1979 and 1980, to evaluate the technical feasibility of ethylic alcohol utilization as a complementary combustible or in a total substitute for the fuel oil in boilers of conventional thermoelectric generation plants. This work presents the performance of one of the Piratininga thermal power plant's boiler, as well as the main data acquired from direct experimentation and the characteristics of this plant, from the use of ethylic alcohol as a substitute of fuel oil. (author)

  7. Systematic approach to the treatment of crude oil produced by small concessionaires in marginal areas of the Reconcavo Basin; Abordagem sistematizada para o tratamento do oleo produzido em campos marginais da Bacia do Reconcavo por pequenos concessionarios

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Edson Jorge Alves [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Engenharia Quimica; Araujo, Marcia Queiroz de [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Quimica; Ferreira, Doneivan Fernandes [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Geologia e Geofisica Aplicada

    2008-07-01

    The establishment of the 'Petroleum Law' (Law No. 9.478/97) abolished the Exploration and Production State Monopoly in Brazil. Attaining concessions through the bidding rounds promoted by the Brazilian Petroleum Agency (ANP) became the only legal means for exploring and/or producing oil and natural gas in Brazil. In order to attract small and medium companies to this niche, inactive areas with marginal accumulations were offered by the Agency. These areas were returned to ANP by PETROBRAS. Currently, six small companies operate in the Reconcavo Oil Province, extracting and processing different types of oil. The available infrastructure is mostly deteriorated and obsolete. Additionally, there are serious limitations in the separation and storage capacity. This scenario resulted in the fragmentation of the old PETROBRAS production infrastructure. A possible solution to this problem could involve the establishment of a collective treatment unit which would work as a condominium. However, the operation of this plant must take into account the diversity of oils being produced in the Reconcavo Basin (physical-chemicals characteristics). This paper is aimed at (1) establishing a preliminary characterization of the different types of oil which will be delivered by local producers; (2) the critical variables for the oil model (it includes all oils received from different areas of the Reconcavo); (3) the identification of the main stake holders within this process; and (4) suggestions for operating models for the treatment unit taking into account the potential innovations and opportunities for R and D and spin-offs. (author)

  8. Study of biocompatible properties of polymeric scaffolds derived from vegetable oils for application in tissue engineering; Estudo das propriedades biocompativeis de arcaboucos polimericos derivados de oleos vegetais para aplicacao na engenharia de tecidos

    Energy Technology Data Exchange (ETDEWEB)

    Baratela, Fernando Jose Costa

    2015-11-01

    Tissue engineering and regenerative medicine have as main objective the morphologic/functional reestablishment of injured tissues and organs using cells, scaffolds, stem cells and control of immunological/biochemical responses promoted by the body. In addition, materials science seeks to develop biocompatible biomaterials that do not promote unwanted immune responses and provide the re-establishment of the functions of the tissue/organ. Polymers of natural origin stand out as biomaterials to resemble biological macromolecules, similarity to the extracellular matrix, reduced chance of inflammation and chronic pacing low or no toxicity. This study aimed the development of macromolecular arrays originated from epoxidized soybean oil (OSE), analyzing the relationship between the chemical structure/biological activity of the macromolecular arrays for use as biomaterials in tissue engineering. The synthesis of OSE was performed through the oil chemical route, whose efficiency was determined by infrared spectroscopy and the reaction yield of 85%, determined by nuclear magnetic resonance spectroscopy. From the analysis by differential scanning calorimetry, it was detected a decrease of the glass transition temperature of the epoxidized soybean oil polymer (POSE) compared with OSE, suggesting an increase of the growth of polymer chains of POSE. Thermogravimetric analysis was performed to define the OSE degradation profile, which degrades in two steps. The POSE degrades in just one step and shows higher thermal stability by the increased molecular interactions. The hydrophilicity and crosslinking of POSE was promoted by the addition of 2-hydroxyethyl methacrylate (HEMA) with the monomer grafting by gamma irradiation. The results showed an increased mechanical stability, gelation and water absorption with the HEMA content increasing. Finally, the degree of crystallinity for such polymers grafted with HEMA was 27.5%, estimated by X-ray diffractometry. The second stage was characterized by (I) developing POSEs with the grafting of HEMA in the proportions OSE / HEMA 90:10 and 65:35 irradiated by gamma rays at doses of 50 and 100kGy, (II) physico-chemical characterization of POSE-HEMA and (III) analysis of biological materials. By infrared spectroscopy, it was detect the epoxidized regions of POSE, as well as the successful grafting of the monomer HEMA concentrations with all radiation doses. By differential scanning calorimetry, the activation energy was calculated (E{sub a}) of the polymers. The crystallinity of the material was defined by X-ray diffraction, showing tendency of amorphous material as well as a small percentage of the increase in crystallinity with increasing intensity of radiation doses during this synthesis and a decrease in crystallinity with the increasing concentration of HEMA. The analysis of the samples did not show cytotoxicity on POSE-HEMA and confirmed the efficiency of polymer washings to remove the processing waste. The analysis of hemocompatibility showed any platelet adhesion and the cell growth on the scaffolds was positive. From the results obtained in this research, we concluded by the potential use of POSE-HEMA in tissue engineering. (author)

  9. Impact study of oil spill on mangrove areas of Sergipe State, Brazilian northeast; Estudo de impacto do derramamento de oleo em areas de manguezal do estado de Sergipe, nordeste do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Nascimento, Solange A. [ADEMA, Aracaju, SE (Brazil)

    1993-12-31

    Results of studies during six years, on oil spills, Cotinguiba River region, caused by an accident on the Fazenda Santa Cruz, Sergipe, are presented. The environmental impacts, oil spill consequences on the mangrove areas affected by the accident, its flora and fauna development, Water Ph measurement, and environmental characteristics are also debated. 6 figs., 2 tabs.

  10. Potential of production of biodiesel starting from the chicken oil in the cooperatives of the West of Parana, Brazil; Potencial de producao de biodiesel a partir do oleo de frango nas cooperativas do oeste do Parana

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Samuel Nelson Melegari de [Universidade Estadual do Oeste do Parana (CCET/UNIOESTE), Cascavel, PR (Brazil). Centro de Ciencias Exatas e Tecnologicas], Email: ssouza@unioeste.br; Neitzke, Guilherme [Universidade Estadual do Oeste do Parana (PIBIC/CCET/UNIOESTE), Cascavel, PR (Brazil). Centro de Ciencias Exatas e Tecnologicas. Programa Institucional de Bolsas de Iniciacao Cientifica; Gomes, Luis Fernando Souza [Colegio Estadual Presidente Castelo Branco, Toledo, PR (Brazil)], Email: luisfsg@ibest.com.br; Bariccatti, Reinaldo Aparecido [Universidade Estadual do Oeste do Parana (CECE/UNIOESTE), Toledo, PR (Brazil). Centro de Engenharia e Ciencias Exatas], Email: bariccatti@unioeste.br

    2006-07-01

    Brazil occupies a prominence place in the development and use of sources renovate of energy, due to its great territorial extension, climate and several alternatives. One of these it is the bio diesel,o production which can substitute the oil diesel, decreasing the impacts to the environment. In the productive chain of chicken meat a residue, chicken oil, is generated with potential for biodiesel production. In this work they were certain characteristics physical chemistries, that can influence in the reactions of transesterification of the chicken oil. It was lifted up the potential of production of chicken oil in the cooperatives of the area west of the state of Parana and yield in biodiesel. The bio diesel production by cooperatives could be of 19.525.209,0 kg/year of bio diesel and the yield of 95%. (author)

  11. Biodegradation polyurethane derived from vegetable oil irradiated with gamma rays 25 kGy and 100 kGy; Biodegradacao de poliuretano derivado de oleo vegetal irradiado com raios gama 25 kGy e 100 kGy

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Antonia M. dos, E-mail: amsantos@rc.unesp.br [Universidade Estadual Paulista - Unesp, Rio Claro, SP (Brazil); Claro Neto, Salvador [Universidade de Sao Paulo - USP, Campus de Sao Carlos, SP (Brazil); Azevedo, Elaine C. de [Universidade Federal do Parana, Campus de Curitiba, PR (Brazil)

    2011-07-01

    The environment requires polymers that can be degraded by the action of microorganisms. In this work was studied the biodegradation of polyurethane samples derived from vegetable oil (castor oil), which were irradiated with gamma rays 25 kGy and 100 kGy compared with the same polyurethane without being irradiated. Biodegradation of polyurethane was carried out in culture medium containing the fungus Aspergillus niger by 146 days and the result was evaluated using the technique of thermogravimetric analysis, where there was a change of behavior of the curves TGA / DTG occurred indicating that chemical modifications of molecules present in the structure of the polymer chain, thus confirming that the material has undergone the action of microorganisms. (author)

  12. The state of art of contingency and emergency plans for oil spill in the Brazilian ports and terminals; O estado da arte dos planos de emergencia e contingencia para derramamento de oleo nos portos e terminais brasileiros

    Energy Technology Data Exchange (ETDEWEB)

    Barros, Sergio R.; Wasserman, Julio C.; Lima, Gilson B.A. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2008-07-01

    Brazilian legislation establishes that the potentially polluting activities, as is the case of the ports and terminals, possess plans of emergency for spilling in order to prevent impacts to the physical, socio cultural and of the work environment. The Federal Law n. 9966, of April 2000, known as the 'Law of the Oil' established the basic principles, to be obeyed for the companies, for harmful or dangerous oil movement and other substances in ports, terminals, platforms and ships in waters under national jurisdiction. The Law defines that the emergency plans are a set of measures that determine the responsibilities and the actions to be unchained after an incident immediately, as well as define the human resources, material and adequate equipment to the prevention, has controlled and combat to the pollution of waters. The CONAMA n. 398, of June of 2008, create a standardization of those procedures, so that there is an integration among the several emergency plans in a certain area. This article has for objective to accomplish a diagnosis in the several institutional programs of emergency to identify the current situation in the organized and terminal ports specialized in liquid barns, evaluating, when possible, it rationality of support logistic, the organization of operational administration and integration. (author)

  13. Preliminaries studies of the technological development of biodiesel production from used frying oil; Estudos preliminares sobre desenvolvimento tecnologico da producao de biodiesel a partir de oleo residual de fritura

    Energy Technology Data Exchange (ETDEWEB)

    Hasner, Cecilia; Mayerhoff, Zea D.V.L. [Instituto Nacional da Propriedade Industrial (INPI), Rio de Janeiro, RJ (Brazil); Martins, Humberto [Biomarca, Vitoria, ES (Brazil); Sena, Denise R. de [Centro Federal de Educacao Tecnologica do Espirito Santo (CEFETES), Vitoria, ES (Brazil)

    2008-07-01

    The aim of the present work was to use the technological information available in the patent system to evaluate the technological routes used in the biodiesel production from waste cooking oil. The search for patent documents was performed in two steps: patent applications in Brazil and patent applications in others countries. The method is described in the following order: choice of the patent searching databases; data parameters definition; displaying results; quantitative and qualitative analysis of the results; and data treatment. The results allowed concluding that the technological process to obtain biodiesel from waste cooking oil mostly used was the esterification followed by transesterification. Methanol was the preferable alcohol, but, there were a great number of Brazilian patents documents using ethanol. Also, there were an increasing number of patent documents concerning the development of new catalysts. The results also showed a low number of patent documents related to the pre-treatment of waste cooking oil, what suggests the need of further research to improve and standardized the raw material quality and consequently overcome the different difficulties during the biodiesel process production. (author)

  14. Project and evaluation of a 2000 meter offshore horizontal well production extra-heavy oil; Projeto e avaliacao de um poco offshore com 2000 m de trecho horizontal produtor de oleo extra-pesado

    Energy Technology Data Exchange (ETDEWEB)

    Ueta, Eduardo M.; Kato, Edson T.; Tinoco, Francisco L.; Vieira, Paulo M.F. [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    The project was proposed to acquire reservoir data, for the development of the Member (Mb) Siri in the concession of Badejo in Campos Basin, having extra-heavy oil, through long and large bore horizontal well. The main objectives were: to obtain the petrophysical properties through continuous coring of the oil and water zones; water sampling for the characterization; to verify the effective length of the horizontal well through production logging; to obtain the reservoir productivity and permeability through formation test; to obtain the oil PVT properties through monophasic sampling and to know the lateral variability of the accumulation. New technologies were used as geochemical geosteering, diversionary acidification and chemical tracer production logging. The well test analysis showed permeability and productivity values better than as expected and making possible the development of pilot project in order to evaluate the aquifer behavior, the long term well productivity and performance of the elevation and behavior of the extra-heavy oil offloading for subsequent development of the reservoir. (author)

  15. Sustainable and economic feasibility of castor bean oil production: a methodology to support investments decision taking; Viabilidade economica e sustentabilidade da producao de oleo de mamona: uma metodologia de suporte a decisao de investimentos

    Energy Technology Data Exchange (ETDEWEB)

    Maia, Glawther Lima [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Mestrado em Logistica e Pesquisa Operacional; Arruda, Joao Bosco Furtado [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil)

    2008-07-01

    The castor bean agribusiness is supported by a complex supply chain that involves several inputs, main products and other derived products. So, the control of production costs is a basic and extremely important activity for the optimization of management processes. Using literature research, case study and assessment of scenarios, the present work was developed with the objective of conceiving a methodology, based on theoretical and economical aspects, the formation of costs and the revenue forecasting, which is applied with the aid of a computational program for supporting decision taking in the castor bean small producers agribusiness. The results obtained in the case study show, for example, that about 40% of the projects are considered accepted under the criterion of recovering the invested capital in less than 2 years. Also, it reveals that 75% of the projects contribute for the increase of the producer income and about 63% of the projects provide enough profit to add value to the producer's properties. Finally, it is clear that the proposed methodology makes easier a better agricultural planning, allowing a better utilization of the raw material and it facilitates the analysis of diversifying other derived products and revenue sources in the castor bean chain. (author)

  16. Evaluation of the permeability of microporous membranes polyamide 6 / clay bentonite for water-oil separation; Avaliacao da permeabilidade de membranas microporosas de poliamida 6/argila bentonitica para separacao agua-oleo

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, P.S.S.; Medeiros, K.M.; Araujo, E.M.; Lira, H.L., E-mail: keilamm@ig.com.br [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais

    2014-07-01

    The petroleum refining industries have faced major problems in relation to the treatment of their effluents before disposal into the environment. Among the conventional technologies treatment of these effluents, the process of oil-water separation by means of membranes has been extensively used, for having enormous potentiality. Therefore, in this study, hybrid membranes of polyamide 6/ bentonite clay were produced by the technique of phase inversion and by precipitation of the solution from the nanocomposites obtained by melt intercalation. The clay was organically modified with the quaternary ammonium salt (Cetremide®). The nanocomposites were obtained from (PA6) with untreated (AST) and treated clay (ACT), which were subsequently characterized by X-ray diffraction (XRD). Already membranes were characterized by XRD, scanning electron microscopy (SEM) and flow measurements. From the XRD results, it was observed an exfoliated and/or partially exfoliated structure for the nanocomposites and for the membranes. From SEM images it was observed that the presence of AST and ACT clays in the polymeric matrix caused changes in membrane morphology and pore formation. The flow with distilled water in the membranes showed a decrease initially and then followed by stability. All membranes tested in the process of separating emulsions of oil in water, particularly those of nanocomposites obtained a significant reduction of oil concentration in the permeate, thus showing that these membranes have a great potential to be applied to the water-oil separation. (author)

  17. Mechanical and thermal properties of castor oil polyurethane bone cement after gamma irradiation;Propriedades mecanicas e termicas de poliuretanas derivadas do oleo de mamona usadas como cimento osseo depois da irradiacao com radiacao gamma

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, E.C. [Universidade Tecnologica Federal do Parana (DF/UTFPR), Curitiba, PR (Brazil). Dept. de Fisica; Soboll, D.S. [Universidade Tecnologica Federal Parana (CPGEI/UTFPR), Curitiba, PR (Brazil); Chierice, G.O.; Claro Neto, S. [Universidade de Sao Paulo (IQSC/USP), Sao Carlos, SP (Brazil). Inst. de Quimica; Lepiesnki, C.M. [Universidade Federal do Parana (DF/UFPR), Curitiba, PR (Brazil). Dept. de Fisica; Nascimento, E.M. [Universidade Tecnologica Federal do Parana (DM/UTFPR), Curitiba (Brazil). Dept. de Mecanica

    2009-07-01

    Polyurethanes from castor oil are being employed as bone cement in medical applications. In this work the thermal and mechanical properties of gamma irradiated polyurethanes derivative from castor oil were investigated by instrumented indentation, thermogravimetry and scanning electron microscopy. A slightly increase in hardness is observed only for doses as high as 100 kGy. Thermal analysis indicates stability at human body temperature. The glass transition temperature has small changes after gamma irradiation. (author)

  18. New petroleum lifting concept - tubular asynchronous motor application for onshore petroleum exploitation - (MATAEOS); Nova concepcao para bombeamento de petroleo - motor assincrono tubular para aplicacao na extracao de oleo (petroleo) subterraneo - MATAEOS

    Energy Technology Data Exchange (ETDEWEB)

    Rossini, Wagner Marques; Cruz, Jose Jaime da; Sales, Roberto Moura [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica. Lab. de Automacao e Controle (LAC)], e-mail: freddie@lac.usp.br, e-mail: jaime@lac.usp.br, e-mail: roberto@lac.usp.br; Alvarenga, Bernardo Pinheiro de; Chabu, Ivan Eduardo; Cardoso, Jose Roberto [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica. Lab.de Eletromagnetismo Aplicado (LMAG)], e-mail: bernardo@eee.ufg.br, e-mail: ichabu@pea.usp.br, e-mail: cardoso@pea.usp.br

    2008-06-15

    This study presents the development of a prototype Tubular Asynchronous Motor Application for Onshore Petroleum Exploitation - (MATAEOS). The principal function of the motor is to directly drive a suction pump installed in the down hole of an onshore well. Considering the installation and operational difficulties and costs of a traditional production system, known as a ''the walking beam and rod string system'', the developed prototype is intended to be a technical and economically viable alternative. The results obtained show that the motor develops a constant lift force throughout the movement (or pumping) cycle, according to the dynamometric charts. The motor also presented an electro-mechanical performance higher than the traditional systems. Furthermore, the motor completely eliminates the need for the actual system's set of hoists. Generally, the results indicate that the motor can advantageously substitute surface mechanical systems. (author)

  19. Morphological analysis of thermoplastic starch films and montmorillonite (TPS/MMT) using vegetable oils of Brazilian Cerrado as plasticizers;Morfologia de filmes de amido termoplastico e montmorilonita (TPS/MMT) usando oleos vegetais do cerrado como plastificantes

    Energy Technology Data Exchange (ETDEWEB)

    Schlemmer, Daniela; Sales, Maria Jose A. [Universidade de Brasilia (UnB), DF (Brazil). Lab. de Pesquisa em Polimeros; Angelica, Romulo S. [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Lab. de Raios X; Gomes, Ana Cristina M.M. [Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA-CENARGEN), Brasilia, DF (Brazil). Lab. de Microscopia Eletronica

    2009-07-01

    Biopolymers can be used where petrochemical plastics have applications with short life. The excellent degradation of starch and its low cost make it an alternative for obtaining biodegradable plastics. To obtain thermoplastic starch (TPS) is necessary mechanical shake, high temperature and plasticizers. In this work, TPS were produced using three different vegetable oils from Brazilian's cerrado as plasticizers: buriti, macauba or pequi. Materials are also produced with montmorillonite (MMT). All the materials were analyzed by scanning electronic microscopy (SEM) and X-ray diffraction (XRD). The starch micrographs revealed irregular delaminate with a predominance of starch and 'holes' for the oils. In nanocomposites the clusters of clay are dispersed without a defined standard. It was understood that the plasticizers and processing completely changed the structure of starch causing a decrease in their crystallinity degree. Almost all nanocomposites presented exfoliate structure, only one presented intercalated structure. (author)

  20. Evaluation of oil and grease removal by adsorptive polymeric resins in semi-industrial scale: influence of temperature; Avaliacao da remocao de oleos e graxas por resinas polimericas adsorventes em escala semi-industrial: influencia da temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Luis F.S. de; Silva, Carla M.F. da; Queiros, Yure G.C.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas, Laboratorio de Macromoleculas e Coloides na Industria de Petroleo, Rio de Janeiro, RJ (Brazil)], e-mail: elucas@ima.ufrj.br

    2011-07-01

    The aim of this study was to evaluate the performance of polymeric resins packed in a fixed bed eluted in semi-industrial scale for oil and greases removal disposed in synthetic oily water in different temperature conditions. For this work, columns packed with vinyl and acryl polymer-base were tested and their efficiency of oil removal was evaluated by fluorimetry technique in two different temperatures: 25 and 60 deg C, in a flow rate condition of 200 mL/min. The experimental results were very good: the removal efficiencies were above 98% in both cases. At 60 deg C, the system keep the efficiency for a longer time: no significant loss in the efficiency was observed after eluting 1,000 times of the column bed volume at 25 deg C and 2,000, at 60 deg C. This result characterizes a great potential of application in the industry. (author)

  1. Implementation and testing of the use of vegetable oils as fuel diesel generators in the Amazon isolated communities; Implantacao e testes de utilizacao de oleo vegetal como combustivel para diesel geradores em comunidades isoladas da Amazonia

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Silva, Orlando Cristiano da; Gonzalez Velaquez, Silvia Maria Stortini; Monteiro, Maria Beatriz C.A.; Silotto, Carlos Eduardo Grassi [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)

    2004-07-01

    The project PROVEGAM 'Implantation and test of a unit demonstration of energetic utilization of vegetable oil', tested in operational conditions of field, the functioning of a conventional diesel engine, adapted to operate with palm oil 'in natura' in the community of Vila Soledade, city of Moju, Para State. The Vila Soledade is an isolated community that has, approximately, 700 inhabitants and it's located at one hundred kilometers from the city hall by car and more 30 minutes by boat. The electric energy of this community was previously generated, by a conventional diesel engine, obsolete and very expensive to the community, because the fuel price and the transport of the diesel oil from the city to the community. The PROVEGAM project, installed an electric generation group, MWM TD229, manufactured in Brazil, adapted with a conversion kit to operate with 'in natura' palm oil, working 6 hours per day. Because of the viscosity of the palm oil and its combustion point, it was necessary to heat the vegetable oil before its injection into the engine. The operation begins and finishes with diesel oil, in order to heat the palm oil and to clean possible residues deposited in the interior of the engine. The use of the palm oil justifies itself for being produced in the region, which means that it doesn't have to be imported. Currently, the generating group is working in the community during 5 hours per day with palm oil, and 1 hour per day with diesel oil and it already has more than 1600 hours of testing. The results of this project, so far, have confirmed the conceived premises, and this electric model of generating energy is already recommended to be implemented in other communities in the Amazon region. (author)

  2. Electricity generation using vegetal oils: the implantation model for the isolated communities in the Amazon Region; Geracao de eletricidade a partir de oleos vegetais: um modelo de implantacao para comunidades isoladas amazonicas

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Silva, Orlando Cristiano; Velazquez, Silvia M.S.G.; Monteiro, Maria Beatriz C.A.; Silotto, Carlos Eduardo G [Centro Nacional de Referencia em Biomassa - CENBIO, Sao Paulo, SP (Brazil)

    2004-07-01

    The territorial occupation from the Amazon region is characterized by isolated communities, which makes the conventional electric distribution economically and technically impracticable. To solve the electric problem of these communities, it is necessary for them to produce their own fuel in order to generate electric energy and promote the development. These are the premises that have guided the elaboration of the project PROVEGAM - which has as objective, the installation and performance testing of a conventional diesel engine, adapted to operate with palm oil 'in natura' at the community of Vila Soledade, city of Moju, Para State. Vila Soledade is an isolated community that has, approximately, 700 inhabitants. The PROVEGAM project installed a diesel generator adapted with a conversion kit to operate with 'in natura' palm oil. The operation begins and finishes with diesel oil, in order to heat the palm oil and cleaning possible residues. During the diesel generator installation, diesel oil emissions and performance were compared with the palm oil. Analysing the results, this electric model of generating energy is already recommended to be implemented in others Amazon region communities. (author)

  3. The state of art of contingency and emergency plans for oil spill in the Brazilian ports and terminals; O estado da arte dos planos de emergencia e contingencia para derramamento de oleo nos portos e terminais brasileiros

    Energy Technology Data Exchange (ETDEWEB)

    Barros, Sergio R; Wasserman, Julio C; Lima, Gilson B.A. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2008-07-01

    Brazilian legislation establishes that the potentially polluting activities, as is the case of the ports and terminals, possess plans of emergency for spilling in order to prevent impacts to the physical, socio cultural and of the work environment. The Federal Law n. 9966, of April 2000, known as the 'Law of the Oil' established the basic principles, to be obeyed for the companies, for harmful or dangerous oil movement and other substances in ports, terminals, platforms and ships in waters under national jurisdiction. The Law defines that the emergency plans are a set of measures that determine the responsibilities and the actions to be unchained after an incident immediately, as well as define the human resources, material and adequate equipment to the prevention, has controlled and combat to the pollution of waters. The CONAMA n. 398, of June of 2008, create a standardization of those procedures, so that there is an integration among the several emergency plans in a certain area. This article has for objective to accomplish a diagnosis in the several institutional programs of emergency to identify the current situation in the organized and terminal ports specialized in liquid barns, evaluating, when possible, it rationality of support logistic, the organization of operational administration and integration. (author)

  4. Standard mapping of the environment sensibility of oil to Lagoa dos Patos, Rio Grande do Sul, Brazil; Padronizacao do mapeamento da sensibilidade ambiental a derramamento de oleo para a Lagoa dos Patos, Rio Grande do Sul, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Felipe C; Griep, Gilberto H [Fundacao Universidade do Rio Grande (FURG), RS (Brazil)

    2008-07-01

    The intense flow of fossil fuels in the inland waters of Patos Lagoon (LP) - Rio Grande do Sul, justifies the importance of preventive actions to claims by oil and derivatives within the lagoon. The mapping and classification of coastline environmental sensitivity for oil spills (Cartas SAO) is fundamental tool for this type of action. Therefore, since 2001, the Laboratory of Geological Oceanography (LOG) of Federal University of Rio Grande (FURG) has developed the mapping SAO for the LP. In this work, through review of raw data from the database of LOG, and taking into account the methodology proposed by the Ministry of Environment (MMA, 2004), gave up a strategic projection of standardized environmental sensitivity of the oil spill to Patos Lagoon. This new account also enable a better understanding of the lagoon ecosystem, enables comparisons between its different areas, facilitating the planning and decision-making, allowing the management for faster action-in response. Like, highlights the regions of the estuary of the LP, the delta of the Camaqua River and Casamento Lagoon as the areas of greater sensitivity to environmental spillage of oil from Patos Lagoon. (author)

  5. Comparison between different methodologies of environmental sensitivity classification for lagoons; Comparacao entre diferentes metodologias de classificacao do indice de sensibilidade do litoral a derramamentos de oleo para ambientes lagunares

    Energy Technology Data Exchange (ETDEWEB)

    Lacerda, Carine; Cabral, Alexandre; Griep, Gilberto Henrique [Fundacao Universidade do Rio Grande (FURG), Rio Grande, RS (Brazil)

    2008-07-01

    This paper aims to show a brief presentation about the variation of Environmental Sensibility Index (ISL) to west coast of Patos Lagoon, in Rio Grande do Sul State, Brazil, between the seasons winter and summer. Furthermore, it compares two different methodologies for Sensibility Classification: the first one, for fluvial environments, which was suggested by PETROBRAS, 2006 and other one for either coastal and tidal environments, suggested by Environmental Ministry, 2002. (author)

  6. Sustainable and economic feasibility of castor bean oil production: a methodology to support investments decision taking; Viabilidade economica e sustentabilidade da producao de oleo de mamona: uma metodologia de suporte a decisao de investimentos

    Energy Technology Data Exchange (ETDEWEB)

    Maia, Glawther Lima [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Mestrado em Logistica e Pesquisa Operacional; Arruda, Joao Bosco Furtado [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil)

    2008-07-01

    The castor bean agribusiness is supported by a complex supply chain that involves several inputs, main products and other derived products. So, the control of production costs is a basic and extremely important activity for the optimization of management processes. Using literature research, case study and assessment of scenarios, the present work was developed with the objective of conceiving a methodology, based on theoretical and economical aspects, the formation of costs and the revenue forecasting, which is applied with the aid of a computational program for supporting decision taking in the castor bean small producers agribusiness. The results obtained in the case study show, for example, that about 40% of the projects are considered accepted under the criterion of recovering the invested capital in less than 2 years. Also, it reveals that 75% of the projects contribute for the increase of the producer income and about 63% of the projects provide enough profit to add value to the producer's properties. Finally, it is clear that the proposed methodology makes easier a better agricultural planning, allowing a better utilization of the raw material and it facilitates the analysis of diversifying other derived products and revenue sources in the castor bean chain. (author)

  7. Electricity generation using vegetal oils: the implantation model for the isolated communities in the Amazon Region; Geracao de eletricidade a partir de oleos vegetais: um modelo de implantacao para comunidades isoladas amazonicas

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Silva, Orlando Cristiano; Velazquez, Silvia M.S.G.; Monteiro, Maria Beatriz C.A.; Silotto, Carlos Eduardo G. [Centro Nacional de Referencia em Biomassa - CENBIO, Sao Paulo, SP (Brazil)

    2004-07-01

    The territorial occupation from the Amazon region is characterized by isolated communities, which makes the conventional electric distribution economically and technically impracticable. To solve the electric problem of these communities, it is necessary for them to produce their own fuel in order to generate electric energy and promote the development. These are the premises that have guided the elaboration of the project PROVEGAM - which has as objective, the installation and performance testing of a conventional diesel engine, adapted to operate with palm oil 'in natura' at the community of Vila Soledade, city of Moju, Para State. Vila Soledade is an isolated community that has, approximately, 700 inhabitants. The PROVEGAM project installed a diesel generator adapted with a conversion kit to operate with 'in natura' palm oil. The operation begins and finishes with diesel oil, in order to heat the palm oil and cleaning possible residues. During the diesel generator installation, diesel oil emissions and performance were compared with the palm oil. Analysing the results, this electric model of generating energy is already recommended to be implemented in others Amazon region communities. (author)

  8. Implementation and testing of the use of vegetable oils as fuel diesel generators in the Amazon isolated communities; Implantacao e testes de utilizacao de oleo vegetal como combustivel para diesel geradores em comunidades isoladas da Amazonia

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Silva, Orlando Cristiano da; Gonzalez Velaquez, Silvia Maria Stortini; Monteiro, Maria Beatriz C.A.; Silotto, Carlos Eduardo Grassi [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)

    2004-07-01

    The project PROVEGAM 'Implantation and test of a unit demonstration of energetic utilization of vegetable oil', tested in operational conditions of field, the functioning of a conventional diesel engine, adapted to operate with palm oil 'in natura' in the community of Vila Soledade, city of Moju, Para State. The Vila Soledade is an isolated community that has, approximately, 700 inhabitants and it's located at one hundred kilometers from the city hall by car and more 30 minutes by boat. The electric energy of this community was previously generated, by a conventional diesel engine, obsolete and very expensive to the community, because the fuel price and the transport of the diesel oil from the city to the community. The PROVEGAM project, installed an electric generation group, MWM TD229, manufactured in Brazil, adapted with a conversion kit to operate with 'in natura' palm oil, working 6 hours per day. Because of the viscosity of the palm oil and its combustion point, it was necessary to heat the vegetable oil before its injection into the engine. The operation begins and finishes with diesel oil, in order to heat the palm oil and to clean possible residues deposited in the interior of the engine. The use of the palm oil justifies itself for being produced in the region, which means that it doesn't have to be imported. Currently, the generating group is working in the community during 5 hours per day with palm oil, and 1 hour per day with diesel oil and it already has more than 1600 hours of testing. The results of this project, so far, have confirmed the conceived premises, and this electric model of generating energy is already recommended to be implemented in other communities in the Amazon region. (author)

  9. Physiochemical, energy characteristics and performance of coconut fiber in the sorption of diesel and bio diesel oils; Caracteristicas fisico-quimicas, energetica e desempenho da fibra de coco na sorcao de oleos diesel e biodiesel

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Adriana Ferla de [Pos-Graduacao em Agronomia - Energia na Agricultura, Faculdade de Ciencias Agronomicas, Universidade Estadual Paulista - FCA/UNESP, Botucatu, SP (Brazil); Curso Superior de Tecnologia em Biocombustiveis, Universidade Federal do Parana - UFPR, Palotina, PR (Brazil)], e-mail: adrianaferla@ufpr.br; Leao, Alcides Lopes [Dept. de Recursos Naturais, Faculdade de Ciencias Agronomicas, Universidade Estadual Paulista - FCA/UNESP, Botucatu, SP (Brazil)], e-mail: alcidesleao@fca.unesp.br; Caraschi, Jose Claudio [Universidade Estadual Paulista - UNESP, Itapeva, SP (Brazil)], e-mail: carachi@itapeva.unesp.br; Oliveira, Luciano Caetano de [Curso de Agronomia, Universidade Federal do Parana - UFPR, Palotina, PR (Brazil)], e-mail: lucianocaetano@ufpr.br; Goncalves, Jose Evaristo [Pos-Graduacao em Agronomia - Energia na Agricultura, Faculdade de Ciencias Agronomicas, Universidade Estadual Paulista - FCA/UNESP, Botucatu, SP (Brazil)], e-mail: evaristto@yahoo.com.br

    2011-07-01

    Accidents involving oil spills and its derivatives on the soil and in hydric bodies are common and worrying once they endanger the quality of the ecosystem. An economical and efficient way of combating oil spills is the use of the sorption method using sorbent materials. There is a range of sorbent materials, however, the natural ones like biomass and vegetable fibers demonstrate interest due to the low cost and good sorbent capacity. There are works concerning the sorption of crude oil, however for diesel and bio diesel, which had their production increased, there is a little or even nothing exists in the literature. The aim of this work was to investigate the sorption capacity of coconut fiber (Cocos nucifera) confronting to the fuels, diesel and biodiesel and to compare them with the peat commercially used. The bio sorbents were also submitted to the physiochemical and energy characterization. Most of the tests were performed on the granulometric size range of {<=}180 {mu}m 180-425 {mu}m; 425-850 {mu}m e 850-3350 {mu}m. The coir fiber presented capacity of diesel and bio diesel sorption similar to the commercial sorbent made of peat. The determination of the calorific power of the bio sorbents shows that they can be used for energy generation before and after they are used as sorbents. This way, those materials can be used after studies of economical viability in this sector and still to increase the economy of the areas where they are abundant. (author)

  10. Heavy metal extraction from produced water in the petroleum industry utilizing vegetal oil derivatives as the extractant; Extracao de metais pesados a partir de aguas produzidas na industria do petroleo utilizando derivados de oleo vegetal como extratante

    Energy Technology Data Exchange (ETDEWEB)

    Santana, Dulcineia de Castro [Centro Federal de Educacao Tecnologica de Goias (CEFET/GO), Goiania (Brazil). Coordenacao de Mineracao], e-mail: dcs@cefetgo.br, e-mail: dcs@eq.ufrn.br; Paulo, Joao Bosco de Araujo [Universidade Federal do Rio Grande do Norte (UFRN), Natal (Brazil). Centro de Tecnologia. Dept. de Engenharia Quimica], e-mail: jbosco@eq.ufrn.br; Lima, Raquel Franco de Souza [Universidade Federal do Rio Grande do Norte (UFRN), Natal (Brazil). Centro de Ciencias Exatas e da Terra. Dept. de Geologia], e-mail: raquel@geologia.ufrn.br; Brandao, Paulo Roberto Gomes [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil). Escola de Engenharia], e-mail: pbrandao@demin.ufmg.br; Fernandes Junior, Wilaci Eutropio [PETROBRAS, RN/CE (Brazil). Unidade de Negocio de Exploracao e Producao do Rio Grande do Norte e Ceara. Gerencia de Desenvolvimento da Producao], e-mail: wilaci@petrobras.com.br

    2007-12-15

    It is well known today that, although being a renewable resource, potable water could also be finite. In the environmental context, very often due to operational costs, the development of new water recycling techniques become significant when faced with the simple adaptation of effluent treatment before final disposal. Produced water comes from exploration operations and/or the production of oil and gas and is generally treated. Following the treatment, part of the produced water is recycled in secondary re-injection operations or steam generation. The remainder, which is the biggest amount, is expelled into the sea through underwater outlets. Millions of liters of water are expelled per day, containing heavy metals such as lead (Pb), cadmium (Cd) and nickel (Ni) in low concentrations. Some of this volume could be recycled for use in the irrigation of oleaginous cultures after this water has been given a suitable post-treatment. This treatment being specified in agreement with Class 3, of CONAMA Resolution No 357 (Brazil, 2005), which establishes the contents as <0,033 mg/L for Pb, <0,01 mg/L for Cd and <0,025 mg/L for Ni. Liquid-liquid extraction is a well known technology for the recovery of metals in aqueous mediums. This work studies the extraction of Pb, Cd, and Ni from a synthetic solution, using QAV solvent (aviation kerosene); and vegetal oil derivatives as the extractant. It is well known that vegetal oil derivatives have a strong complexation power on metals. A bench test basic investigation was made with the objective of studying the selectivity of coconut oil derivatives in the extraction of metals from synthetic solutions. The determination of the heavy metal concentrations in a complex matrix was made by using the atomic absorption spectrometry technique (AAS). The results of the preliminary experiments were promising. (author)

  11. Introduction of biodiesel made from cooking oil in transportation of Itajuba (MG): a case study; Introducao do biodiesel de oleo de fritura no transporte coletivo de Itajuba (MG): um estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Luiz Augusto Horta; Capaz, Rafael Silva [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Inst. de Recursos Naturais

    2008-07-01

    The biodiesel has been presented as good alternative of the mineral diesel, with potential advantages in social and environmental terms, however it is still considered no competitive. The use of fatty residues, like used frying oils, for biodiesel production has been motivating many studies, due to the low cost of acquisition. However, when a project considers the collect of residue of commercial sector and residential sector, the feedstock's quality and the logistics to be adopted for the collection of this raw material are serious hurdles to be considered. In this work there were appreciated the volumes of residual oil originated from the commercial, residential and industrial sectors of the an average size town in Minas Gerais (Itajuba), in order to be converted in biodiesel and supply part of demand of municipal passengers transport. The offer of residual oil evaluated was of the order was up to 144 m{sup 3/}year, with a cost of the biodiesel production of R$1,214/liter. When taking into account the effects of taxation and the expenses evaluated with the collection, the cost of the biodiesel improves to values R$1,676/liter and R$1,819/liter. However, with the additional receipts originating from the marketing of the glycerine produced in the process these costs can fall to R$1,254/liter. It was calculated that the volume of biodiesel obtained can be reach 10 % of the demand in the municipal passengers transport, with limited economical impacts on the fare of bus, caring out benefits of environmental order, like the reduction of the emission of gases and the creation alternative sinks of the fatty residues, which in great part of the times is discarded in waters' bodies. (author)

  12. Quality of pies obtained of the extraction of sunflower and crambe oil for biodiesel under different temperatures; Qualidade das tortas obtidas na extracao do oleo de girassol e crambe para biodiesel sob diferentes temperaturas

    Energy Technology Data Exchange (ETDEWEB)

    Bischoff, Tabata Zingano; Prado, Naimara Vieira do; Coelho, Silvia Renata Machado; Bischoff, Teodato Zingano [Universidade Estadual do Oeste do Parana (UNIOESTE), PR (Brazil)], emails: tabatazbi@yahoo.com.br, nai_mara@hotmail.com, srmcoelho@unioeste.br, teodato_zb@hotmail.com; Figueiredo, Paulo Roberto Abreu de [Instituto Agronomico do Parana (IAPAR), Londrina, PR (Brazil)

    2011-07-01

    Sunflower and crambe are viable alternatives to ethanol. Used in food production, the sunflower crop has economic, rustic and does not require specialized machinery. The crambe oil is concentrated enough, it is feasible to farm and is not edible. The extraction efficiencies of these oils gives to the heating and moisture content of grain. The aim of this study was to evaluate temperatures of oil extraction in sunflower and crambe as pies obtained. For oil extraction and acquisition of pies, we used a high pressure extruder press. The sunflower seed and crambe were extruded without heating and at temperatures of 50 and 70 deg C with three replicates for each treatment, estimated to be the pie, the amount of fat, protein and moisture. Increasing the temperature, we observed a reduction of moisture in sunflower cake, but this did not occur in seeds of crambe. For sunflower, the higher levels of lipids occurred for pie without heating, and for crambe, the higher levels of lipids occurred at 50 deg C. As for the protein, was found in both cultures, the highest level at 70 deg C. It is concluded that the extraction temperature alters the composition of oilseed cakes. (author)

  13. Study on the potential of water/oil of tubular alumina ceramics through flux and turbidity analysis; Estudo do potencial de separacao agua/oleo de membranas ceramicas tubulares de alumina atraves da analise das medidas de fluxo e turbidez

    Energy Technology Data Exchange (ETDEWEB)

    Silva, A.A; Melo, K.S. [Universidade Federal, Campina Grande, PB (Brazil)]. E-mail: adrianasilva_cg@yahoo.com.br; Maia, J.B.N.; Franca, R.V.; Silva, R.A.V.; Lira, H.L.; Carvalho, L.H. [Universidade Federal, Campina Grande, PB (Brazil). Dept. de Engenharia de Materiais]. E-mail: helio@dema.ufpb.br; Franca, K.B.; Rodrigues, M.G.F [Universidade Federal, Campina Grande, PB (Brazil). Dept. de Engenharia Quimica]. E-mail: kepler@labdes.ufpb.br

    2003-07-01

    In the last years, a considerable attention was given to the effluents composed by contaminated water with oil and the impact on the environment . The water pollution by oleaginous hydrocarbon is specially harmful to the aquatic life, decreasing the transmission of light and disturb the normal mechanism of oxygen transfer. So, to remove oil from water is an important aspect to control the pollution from several industries. The ceramic membranes act as a barrier for the emulsified oil. It has been studied enough as a medium to separate oil/ water from stable emulsions. The objective of this work is to present an evaluation of the separation potential of a tubular alumina ceramic membrane made in laboratory from Materials Engineering Department, Federal University of Campina Grande (UFCG). It was done test of flux and concentration of oil the permeate. The results showed that the membranes can be satisfactorily used in the oil/water separation. (author)

  14. Automatic inspection of oil and gas pipe welded joints by radiographic images analyses; Analise automatica de imagens radiologicas aplicada a inspecao de juntas soldadas em tubulacoes de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, Guilherme A.; Felisberto, Marcelo K.; Pilkel, Lucas V.; Centeno, Tania M.; Arruda, Lucia V.R. [Centro Federal de Educacao Tecnologica do Parana (CEFET-PR), Curitiba, PR (Brazil). Curso de Pos-graduacao em Engenharia Eletrica e Informatica (CPGEI). Lab. de Automacao e Sistemas de Controle Avancado

    2004-07-01

    The reliability and integrity evaluation of structures and equipment on the petroleum and gas industry is an absolute necessary care due to economic reasons and safety. As a consequence, new supporting technologies for well known nondestructive test and evaluation methods have been developed in order to automate these inspection processes, improving their robustness, accuracy and quickness. On this way, the present work introduces solutions to overcome some obstacles to the automation of the radiographic image analysis task for the pipeline weld joint inspection, on radiographic non-destructive tests and evaluations. The main contributions are related to the improvements to techniques for the automatic weld bean segmentation and the development of an effective algorithm for the weld bean defect detection and extraction of relevant defect descriptors. (author)

  15. Chemical modification of HTPB for application as polymeric additives for diesel fuel. 1 - phenyl ethers; Modificacao quimicado PBLH para aplicacao como aditivos polimericos para oleo diesel. 1. eteres fenilicos

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Agne R.; Prezibella, Alysson M.; Ferraz, Fernando A.; Soldi, Rafael A.; Oliveira, Angelo R.S.; Cesar-Oliveira, Maria Aparecida F. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Dept. de Quimica. Lab. de Polimeros Sinteticos

    2007-07-01

    The petroleum industry faces several problems related to the crystallization of paraffins, in petroleum and its derivatives, with the reduction of the service temperature. To solve this problem polymeric additives are used, of which the esters have been enough studied in several areas of the world, except in Brazil. In this work, this class of pour point depressant additives it was obtained through the chemical modification of Hydroxyl Terminate Polybutadiene (HTPB) that present a hydrocarbon chemical structure containing one double bound in each repetitive unit and hydroxyl groups of the primary and secondary allylic types - functional groups potentially reactive. The obtained products were characterized by Fourier transformed infrared spectroscopy and nuclear magnetic resonance, and they are being tested as additive for the pour point reduction of a diesel oil samples (REPAR-PETROBRAS). (author)

  16. Proposition to use 'in natura' vegetable oil and biodiesel from castor oil in thermal power plants; Proposicao de uso de oleo vegetal in natura e biodiesel de mamona em termeletricas

    Energy Technology Data Exchange (ETDEWEB)

    Soares, B.F.; Tahan, C.M.V.; Pelegrini, M.A.; Polizel, L.H. [Universidade de Sao Paulo (ENERQ/USP), SP (Brazil). Centro de Estudo em Regulacao e Qualidade de Energia; Vandelli, M.V.M. [Termocabo Ltda., Recife, PE (Brazil); Takeno, H.K. [Companhia Energetica de Petrolina (CEP), PE (Brazil)

    2006-07-01

    This paper proposes the adoption of renewable fuels on thermal power plants using diesel or high sulfur fuel oil generator sets. The renewable fuels proposed to partially or fully replace the fossil fuels are castor oil in natura or transesterified (biodiesel). Physical and chemical analyses were carried out on laboratory, establishing the energetic performance of each sample. The results showed that mixtures of bio diesel-fossil fuel offers similar performance when compared to the conventional fuels, allowing its use on thermal power plants in a satisfactory basis. (author)

  17. Methodology to characterize an unsampled oil interval, integrating PVT (Pressure/Volumen/Temperature) analysis and production log; Metodologia para caracterizacao de oleo de intervalo nao-amostrado, integrando analise PVT e perfil de producao

    Energy Technology Data Exchange (ETDEWEB)

    Marcon, Diogo Reato; Souza, Ana Paula Martins de; Vieira, Alexandre J.M. [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This work presents a new methodology for characterizing an unsampled oil interval, using basically production log data and PVT analyses available in the well. The methodology was applied to a real case, where the live oil samples were collected during a well test run in three different depths, revealing some evidence of a compositional grading due to gravity. Each individual sample was a mixture of the fluid produced from the reservoir bottom to the sampling point, since the whole interval was perforated and the isolation had to be made with a packer. The first sample was corresponding to the mixture of lower and all upper oils. The other two samples are only the heavier and that oil with part of the one from the upper interval. In order to identify the fluid properties from the upper interval, needed for production development studies, the following procedure was devised: equation-of-state tuning, reproducing the sampled fluid properties; conversion of volumetric flowrates from production log into mass and molar flowrates; flowrate ratio calculation, between the upper and lower intervals; upper interval fluid composition estimative; upper interval fluid properties simulation, using the previously tuned equation-of-state, thus generating what was considered a representative, synthetic PVT analysis. (author)

  18. PRODUT - a pipeline technological program to face the challenges in the oil and gas transportation in Brazil; PRODUT - um programa tecnologico de dutos para enfrentar os desafios do transporte de oleo e gas no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Passos, Ney Goncalves [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas

    2003-07-01

    Following the international tendency of the pipeline companies, PETROBRAS has been investing relevant resources in new technologies, with the objective of increasing reliability and life span, and decreasing the cost and the risk of leakage. PETROBRAS created in 1998 the pipeline technological program, PRODUT, to be responsible for coordinating the development of the company R and D projects. This paper will present PRODUT and the good results obtained in order to increase reliability and competitiveness of transportation systems, essential for global performance of the petroleum industry. (author)

  19. The responsibility of the agents responsible for environmental damage caused by oil spilling in Brazil; A responsabilidade dos agentes causadores de dano ambiental por derramamento de oleo no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This essay talks about the responsibility of the agents that cause damage to the environment, both civil liability, as well as criminal and administrative responsibility. It analyzes the most important brazilian juridical rules, emphasizing the National Environmental Politics Law, the Brazilian Federal Republic Constitution and the Environmental Crimes Law. Specially, due to the amount and importance of the oil and gas activities in Brazil, it talks about the environmental responsibility, in the above mentioned fields, related to damage resulting from the Oil and Gas Industry's activities. It focuses the rules that rule this subject in the brazilian juridical system, emphasizing the cases of environmental damage resulting from oil spills in Brazil and the probable juridical consequences to the agents responsible for this damage. (author)

  20. Introduction of biodiesel made from cooking oil in transportation of Itajuba (MG): a case study; Introducao do biodiesel de oleo de fritura no transporte coletivo de Itajuba (MG): um estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Luiz Augusto Horta; Capaz, Rafael Silva [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Inst. de Recursos Naturais

    2008-07-01

    The biodiesel has been presented as good alternative of the mineral diesel, with potential advantages in social and environmental terms, however it is still considered no competitive. The use of fatty residues, like used frying oils, for biodiesel production has been motivating many studies, due to the low cost of acquisition. However, when a project considers the collect of residue of commercial sector and residential sector, the feedstock's quality and the logistics to be adopted for the collection of this raw material are serious hurdles to be considered. In this work there were appreciated the volumes of residual oil originated from the commercial, residential and industrial sectors of the an average size town in Minas Gerais (Itajuba), in order to be converted in biodiesel and supply part of demand of municipal passengers transport. The offer of residual oil evaluated was of the order was up to 144 m{sup 3/}year, with a cost of the biodiesel production of R$1,214/liter. When taking into account the effects of taxation and the expenses evaluated with the collection, the cost of the biodiesel improves to values R$1,676/liter and R$1,819/liter. However, with the additional receipts originating from the marketing of the glycerine produced in the process these costs can fall to R$1,254/liter. It was calculated that the volume of biodiesel obtained can be reach 10 % of the demand in the municipal passengers transport, with limited economical impacts on the fare of bus, caring out benefits of environmental order, like the reduction of the emission of gases and the creation alternative sinks of the fatty residues, which in great part of the times is discarded in waters' bodies. (author)

  1. AGRIFIS - simulator prospecting scenarios and evaluation of projects for production of seeds, in nature oil and castor oil biodiesel; AGRIFIS - simulador de prospeccao de cenarios e avaliacao de projetos de producao de sementes, oleo in natura e biodiesel de mamona

    Energy Technology Data Exchange (ETDEWEB)

    Polizel, L.H.; Tahan, C.M.V.; Pelegrini, M. A.; Soares, B.F. [Universidade de Sao Paulo (ENERQ/USP), SP (Brazil). Centro de Estudos em Regulacao e Qualidade de Energia], Email: cmvtahan@pea.usp.br; Takeno, H.K. [Companhia Energetica de Petrolina (CEP), PE (Brazil); Silva, O.C. da; Monteiro, B.; Velazquez, S.M.S.G. [Universidade de Sao Paulo (CENBIO/USP), SP (Brazil). Centro Nacional de Referencia em Biomassa; Drumond, M.A.; Anjos, J.B. dos [EMBRAPA Semi-Arido - Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA), Petrolina, PE (Brazil)

    2006-07-01

    This paper presents a model conceived for scenario prospection and project evaluation of small scale castor bean farming, oil extraction and bio diesel production (transesterification) integrated chain. To evaluate the performance of each project the model adopts financial, social and environmental index such as NPV, IRR, SPB, DPB, production costs, family income, number of settled families and employment. The model was implemented in a computational environment, allowing its use as a decision support tool for investments on the castor bean production chain; it calculates the cash flow of the entire project and of each family, including earnings, debts, taxes, interest and amortization. (author)

  2. Evaluation gamma radiation in composite sisal fiber- polyurethane derived of castor oil by bending test; Avaliacao da influencia da radiacao gama em compositos de fibra de sisal - poliuretano derivado de oleo de mamona atraves de ensaios de flexao

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Felipe H. de; Geraldo, Ricardo R.; Vasco, Marina C.; Azevedo, Elaine, E-mail: helunica@yahoo.com.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Claro Neto, Salvador [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Instituto de Quimica

    2015-07-01

    Materials used for making furniture and accessories or positioning in X -ray examination rooms should not exhale volatile organic compounds and are resistant to ionizing radiation. One solution is the use of vegetable fiber and polyurethane composites of vegetable origin, since they are biodegradable, derived from renewable raw materials and have no volatile organic compounds. The main difficulty in developing this material is fiber adhesion with the polymer. The objective of this study is to evaluate the mechanical properties of composite sisal fiber composite, without further treatment, and polyurethane derived from castor oil, with a dose of 25 kGy gamma radiation, subjected to 3 points bending tests. (author)

  3. Analysis of oil content in sunflower seeds with nuclear magnetic ressonance and `SOXHLET` methods; Determinacao do teor de oleo em sementes de girassol pelos metodos de ressonancia magnetica nuclear e soxhlet

    Energy Technology Data Exchange (ETDEWEB)

    Ungaro, Maria Regina Goncalves [Instituto Agronomico de Campinas, SP (Brazil). Secao de Oleaginosas; Toledo, Nilva Maria Prestes de [Instituto Agronomico de Campinas, SP (Brazil). Secao Tecnica Experimental e Calculo; Teixeira, Joao Paulo Feijao [Instituto Agronomico de Campinas, SP (Brazil). Secao de Fitoquimica; Suassuna Filho, Jose [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Dept.de Fisica

    1993-12-31

    Individual and group of seeds of some sunflower populations were utilized in order to evaluate the feasibility of oil content evaluations by the Nuclear Magnetic Resonance method (NMR). Correlation analysis with the extractive method (Soxhlet) was performed. The results showed that: the oil in the seeds behaved like a liquid in the NMR analysis; there was a high and positive correlation (r = 0,93) between NMR and Soxhlet; there was no correlation between seed weight and oil content; the observed variability in oil content among seeds of a plant were higher than between plants of a population; these values indicate the importance of making individual analysis of oil content by the NMR method for the sunflower breeding for oil content. (author) 7 refs., 2 figs., 4 tabs.

  4. Seed prepare for oil content determination by NMR method in six cotton varieties; Preparo de sementes para determinacao do teor de oleo pelo metodo de RMN em seis variedades de algodoeiro

    Energy Technology Data Exchange (ETDEWEB)

    Gondim-Tomaz, Rose Marry Araujo; Erismann, Norma de Magalhaes; Sabino, Nelson Paulieri; Kondo, Julio Isao; Cia, Edivaldo; Azzini, Anisio [Instituto Agronomico de Campinas, SP (Brazil). Centro de Algodao e Fibrosas Diversas]. E-mail: gondim@cec.iac.br; Soave, Daise [Instituto Agronomico de Campinas, SP (Brazil). Centro de Genetica, Biologia Molecular e Fitoquimica

    1998-07-01

    Three comparative methods (chemical seed-delinting with sulphuric acid solution, flaming and seed with linter) to prepare cotton seeds for oil determination by the Nuclear Magnetic Resonance (NMR) technique were considered. The chemical treatment with sulphuric acid was the best as long the linter interference was eliminated. The seed oil contents were determined by the NMR method in six cotton varieties from the national variety test. The IAPAR (Instituto Agronomico do Parana) 71 PR3 and IAC (Instituto Agronomico de Campinas) 20 varieties presented the highest oil content followed by the CNPA 7H, CS 50, IAC 22 and CNPA Precoce 2. (author)

  5. Evaluation of specific consumption from the use of chicken oil biodiesel in one cylinder generator set; Avaliacao do consumo especifico a partir da utilizacao de biodiesel de oleo de frango em um grupo-gerador monocilindrico

    Energy Technology Data Exchange (ETDEWEB)

    Fiorese, Diego Augusto [Universidade Federal de Santa Maria (PGEAGRI/UFSM), RS (Brazil). Dept. de Engenharia Rural. Programa de Pos-Graduacao em Engenharia Agricola], E-mail: dafiorese@yahoo.com.br; Lima, Paulo Peruzzo de [Faculdade Assis Gurgacz (FAG), Cascavel, PR (Brazil); Souza, Abel Alves de; Souza, Samuel Nelson Melegari de [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil). Dept. de Ciencias Exatas e Tecnologicas; Dallmeyer, Arno Udo [Universidade Federal de Santa Maria (PGEAGRI/UFSM), RS (Brazil). Programa de Pos-Graduacao em Engenharia Agricola

    2010-07-01

    Biodiesel can be produced from numerous materials, including by-products of animal chain. In this scenario, the chicken's oil, that is located and an environment not explored for biodiesel production, can be a good alternative in South and Southeast Brazilian Region, where they are slaughtered around 9.100.000 chickens per day. In order to determine the specific consumption from a generator set with single cylinder 6.6 kW of power and generation capacity of 5 kW, using chicken oil biodiesel (B-100), were performed the bench test using a auxiliary tank, precision scale and an energy analyzer. Were conducted four treatments (25%, 50%, 75% and 100% of generating capacity). The worst SC was the engine at 25% of generation capacity (1.5 kW) and better with 75% of maximum load (3.75 kW) with a mean of 479.34 g kWh{sup -1}. By Turkey's test ant 5% probability there was a significant difference only for the first treatment. (author)

  6. Study of the influences of the zeolites physical and chemical characteristics in the soya oil cracking; Estudo das influencias das caracteristicas fisico-quimicas de zeolitas no craqueamento do oleo de soja

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Frances Regiane dos

    1995-10-01

    Vegetable oils have been studied as raw materials to yield fuel hydrocarbons. The catalytic and thermal transformations of these oils have been presented as being able to generate hydrocarbons from which diesel oil and vegetable gasoline may be obtained. (author)

  7. Preliminary experiments aiming the production of `vegetable petroleum` by the catalytic conversion of `babacu` and castor oils; Experimentos preliminares visando a producao de petroleo vegetal, pela conversao catalitica de oleos de mamona e babassu

    Energy Technology Data Exchange (ETDEWEB)

    Weyne, Gastao Rubio de Sa [Sao Paulo Univ., SP (Brazil). Escola Politecnica. Dept. de Engenharia Quimica

    1989-09-01

    The catalytic conversion of vegetable oils produces hydrocarbons and despite the industrial production of that raw materials being expensive and even insufficient for a substitution program, Brazil has conditions to increase it and to get lower cost because the very much favourable conditions of soil to plant oleaginous seeds. In this work are presented the preliminary experimentalresults of this catalytic conversion in laboratory scale carried out in the Department of Chemical Engineering at Polytechnical School of Sao Paulo University, using babassu and castor oils and several catalysts at bentonits, zeolites and sodium chloride. The `vegetable petroleum` produced was quantitatively analysed, being determined the paraffin, olefinic, naphtene and aromatic hydrocarbons. ASTM distillation was carried out. At the temperature of 300 deg C and atmospheric pression, the batter catalyst was the sodium chloride, giving a yield larges than 80% volume. It shows that, in spite of producing hydrocarbons at higher costs than the ones obtained from petroleum, it is necessary to enlarge the studies for the conversion to hydrocarbons as one of the answers to the Brazilian energetic problem. (author) 13 refs., 4 tabs.

  8. The influence of the preparation of lignin bio-resins used in oil spilled agglomeration; A influencia do uso da lignina na preparacao de bio-resinas utilizadas na aglomeracao de oleo derramado

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Joao Felipe T.; Pereira, Thaissa; Ferreira, Leticia P.; Delazare, Thais; Souza Junior, Fernando G. [Instituto de Macromoleculas Professora Eloisa Mano - IMA/Universidade Federal do Rio de Janeiro - UFRJ, RJ (Brazil)], e-mail: fernando_gomes@ima.ufrj

    2011-07-01

    Locate the oil, a source of energy that took millions of years to be formed is a task that requires much knowledge and technology, and large investments. However, during its operation, storage or transportation of oil, the risk of spills occurring in potential that can cause extensive damage to the environment. Experience of major accidental oil spills has shown the importance of damage to the environment, harming marine life, fishing and tourism. Thus this study aims to evaluate the use of renewable sources to create an 'absorbent green' by using the lignin, furfural and cardanol, being catalyzed by sulfuric acid. This bio-resin synthesized shows good chemical similarity with oil, because it has both aromatic and aliphatic compounds, thereby facilitating the strong physical interaction between the resin and oil, allowing the agglomeration process in the same lake environments. (author)

  9. The influence of the preparation of lignin bio-resins used in oil spilled agglomeration; A influencia do uso da lignina na preparacao de bioresinas utilizadas na aglomeracao de oleo derramado

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Joao Felipe T.; Silva, Thaissa P.; Ferreira, Leticia P.; Delazare, Thais; Souza Junior, Fernando G. [Instituto de Macromoleculas Professora Eloisa Mano - IMA/Universidade Federal do Rio de Janeiro - UFRJ, RJ (Brazil)], e-mail: fernando_gomes@ima.ufrj.br

    2011-07-01

    Locate petroleum, an energy source which spent millions of years to be formed, requires a lot of knowledge and technology, beyond large investments. However, along extraction, storage or transport of oil, there is a real risk of spills take place, causing extensive damage to the environment. Experience acquired due to accidental oil spills shows the large extension of damage imposed to the environment, impacting marine life, fishing and even tourism. Thus this study proposes the use of renewable sources, aiming to create an {sup g}reen absorbent material{sup .} This material is obtained through a polycondensation among lignin, furfural and cardanol, catalyzed by a strong acid. Synthesized bio-resin presents a good chemical similarity with oil, due to the tuning of its aromatic / aliphatic compounds, producing a strong physical interaction between the resin and oil, making the agglomeration process easy and contributing for the cleanup of oil spilled on water. (author)

  10. Internet: a key element in the communication of the environmental performance of the oil and gas companies; Internet: elemento chave na comunicacao da performance ambiental de empresas de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Margareth Costa [PETROBRAS/LUBNOR, Fortaleza, CE (Brazil)]. E-mail: margarethandrade@petrobras.com.br; Abreu, Monica Cavalcanti Sa de [Universidade Federal do Ceara, Fortaleza, CE (Brazil). Pro-Reitoria de Pesquisa e Pos-graduacao]. E-mail: mabreu@ufc.br

    2003-07-01

    A new way of behavior called the Triple Bottom Line has emerged as a consequence of the convergence of the economical, environmental and social dimensions in the strategic planning of the companies. Transparency has being presented as one of the seven revolutions established by the Triple Bottom Line and has being driven by information technology from television satellites and Internet. Nowadays, the oil and gas companies are subjected to changes of values and ideologies of society and to pressures that come from outside of the organization and influence their performance in the market. In another point of viewing, the huge availability of information allows a comparison by benchmarking and the buildup of a performance ranking among companies. This way, the flux of information activates management tasks. This work studies the transparency level of the biggest oil and gas companies by analyzing information available in their home pages. Some aspects of behavior related to environmental performance and how they answer to the demands of the society are analyzed. The main conclusion of this study is that Internet has become a key element in the communication of the environmental performance of the oil and gas companies. (author)

  11. 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)

  12. Treatment of post-consumption oils from Paraiba state - Brazil - clays for application as bio fuel; Tratamento de oleos pos-consumo a partir de argilas da Paraiba para aplicacao como biocombustivel

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, E.P.; Oliveira, S.V. de; Medeiros, K.M. de; Silva, D.F. da; Araujo, E.M.; Fook, M.V.L. [Universidade Federal de Campina Grande (DEMa/UFCG), PB (Brazil). Dept. de Engenharia de Materiais], e-mail: elainepatriciaaraujo@yahoo.com.br

    2008-07-01

    The utilization of fuels of agricultural origin in the cycle diesel engines is a good alternative to reduce dependence on importation petroleum, since these fuels are a renewable source of energy. The utilization of biodiesel as biofuel is a contribution to the environment, reducing the qualitative and quantitative form levels of environmental pollution. The recycling of post-consumption oil helps reduce the uncontrolled disposal and environmentally dangerous, than to obtain fuel with a cost / benefit and offering a competitive alternative commercial advantage. However, these oils should go through a process of decontamination and clearing up the stage of chemical conversion which is used clay to lighten the oil. This work had as its objective to make a literature revision evaluating the potential of the clearing clay modified in Paraiba, used in post-consumption oils for application as biofuel. (author)

  13. Development of a new separator oil/water: adaptation of a laboratory prototype envisage an industrial application; Desenvolvimento de um novo separador oleo/agua: adaptacao do prototipo de laboratorio visando aplicacao industrial

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, Gustavo de S.; Paulo, Joao B. de A.; Costa Junior, Jose A. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Fernandes Junior, Wilaci E. [PETROBRAS, Natal/Fortaleza, RN/CE (Brazil). Unidade RN/CE

    2008-07-01

    The present work deals with the adaptation of a new separator oil/water called Mixer Settler based on Phase Inversion of (MDIF) in scale of laboratory for future application in industrial scale. The adaptations were carried out by changing of the materials of construction and the substitution of the original system of mechanical mixing by a static or on-line mixer. The equipment works through the unit operation of liquid-liquid extraction associated with the innovative method of phase inversion to separate the fine oil droplets which appear emulsified into produced waters. The extractant solvent was QAV (aviation kerosene). A composed central design was used to evaluate the performance of the equipment, considering the separation efficiency (%) as the response variable in function of the TOG (total oil and greases). Envisaging an industrial application we plotted contour curves to determine the regions which it is possible to operate the equipment on optimized conditions in view of separate oil at low concentrations, minimizing the quantity of extractant solvent. (author)

  14. Steam and solvent injection as an advanced recovering method for heavy oil reservoirs; Injecao de vapor e solvente como um metodo de recuperacao avancada em reservatorios de oleo pesado

    Energy Technology Data Exchange (ETDEWEB)

    Galvao, Edney Rafael V.P.; Rodrigues, Marcos Allyson F.; Barbosa, Janaina Medeiros D.; Barillas, Jennys Lourdes M.; Dutra Junior, Tarcilio V.; Mata, Wilson da [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    Currently a resource more and more used by the petroleum industry to increase the efficiency of steam flood mechanism is the addition of solvents. The process can be understood as a combination of a thermal method (steam injection) with a miscible method (solvent injection), promoting, thus, the reduction of interfacial tensions and oil viscosity. The mobility of the displaced fluid is then improved, resulting in an increase of oil recovery. To better understand this improved oil recovery method, a numerical study of the process was driven contemplating the effects of some operational parameters (distance between wells, injection fluids rate, kind of solvent and injected solvent volume) on the accumulated production of oil and recovery factor. Semisynthetic models were used in this study but reservoir data can be extrapolated for practical applications situations on Potiguar Basin. Simulations were performed in STARS (CMG, 2007.11). It was found that injected solvent volumes increased oil recovery and oil rates. Further the majority of the injected solvent was produced and can be recycled. (author)

  15. The feasibility of the gas micro-turbines application in the heavy oil produced from onshore mature fields; A viabilidade do uso de micro-turbinas a gas em campos maduros onshore de oleos pesados

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Arlindo Antonio de; Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia

    2004-07-01

    This article presents a synthesis of the fast advances in micro co-generation technology and their possible applications in fields of petroleum. The subject is focus of a research of the authors and the preliminary results indicate a potential of contributing for the optimization of mature fields of heavy oil. In general, this technology involves smaller environmental impact and produces better efficiency in those uses that require heat and electricity. An application interesting it is the use of gas micro-turbines, operating in co-generation in a (heavy) oil fields onshore, where it is possible increment of the production to the if it uses the steam injection as method of secondary recovery. The idea of using the heat to improve the productivity of the wells and to increase the recovery factor is almost as old as the industry of the petroleum. The technique consists of heating up the oil to reduce his/her viscosity and to facilitate the drainage. Nowadays, the use of the steam injection is usual in fields of heavy oils (degree API <20), high viscosity (> 500 cp), reservoirs no deep (<1300 m) and net pay in the interval from 5 to 50 m. The innovation, here, is the use of a group of micro-turbines moved to gas (no rare, burned in the flare) to generate the steam 'in loco' (near to the well) and electricity for own consumption or even commercialization. This article presents a case study of the economical potential the use of four gas micro-turbines, operating in micro cogeneration, in a field of 6,6 km{sup 2} in the Brazilian Northeast. (author)

  16. The influence of asphaltenes of the petroleum on the rheology of O/W (Oil/Water) emulsions; Influencia de asfaltenos do petroleo sobre a reologia de emulsoes O/A (Oleo/Agua)

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Ronaldo Goncalves dos; Mohamed, Rahoma Sadeg; Loh, Watson; Bannwart, Antonio Carlos [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil)

    2004-07-01

    Heavy oils represent a large fraction of the Brazilian petroleum reserves and display a great potential for application as substitute to the conventional oils, provided a suitable technology for their transportation is available. The high viscosity of these heavy oils leads to high flow resistance and increase in the recovery and transportation costs. Methodologies employed to reduce these problems involve application of heat of addition of diluents or lighter oils, but are associated with high costs. Formation of low viscosity oil-in-water emulsions has been proposed as an alternative for the transportation of heavy oils, as investigated in this work. Preliminary results indicate significant viscosity decreases upon emulsification of heavy oils (viscosities greater than 1,000 cP) forming o/w emulsions with high oil content (between 50-65 vol. %), which display viscosities within 4-25 cP. Additionally, the effect of different surfactants, methodology of preparation and oil asphaltene content on the emulsion stability was also evaluated. These results confirm the potential of emulsification as a viable methodology for heavy oil transportation. (author)

  17. Flotation of agent for breach of emulsion oil/water aiming treatment of water produced for the industry petroleum; Agente de flotacao (Tanfloc) para quebra de emulsao oleo/agua visando tratamento de aguas produzidas pela industria do petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, A.C. de; Andrade, J.M. de; Melo, M.A.A.; Melo, D.M.A. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    This work was studied the action of an agent of flotation TanFloc broken emulsion in oil / water when its concentration varies and salinity. This material is used by Petroleum brazilian for removal of turbidity in the water from the petroleum industry. For the test set up a bench in the laboratory of the Environmental Technology UFRN for simulation of tests made on the field. To do so, was studied the concentration of TanFloc and it was found that the best concentration for removal of turbidity was 11ppm such material. It was found that the level of salinity affects particularly the results of turbidity therefore this was also one of the parameters studied. (author)

  18. Semi-industrial production of organo clays to use in base oil drilling fluid; Producao em escala piloto de argilas organofilicas visando uso em fluidos de perfuracao base oleo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Heber S.; Martins, Alice B.; Costa, Danubia L. da; Ferreira, Heber C.; Neves, Gelmires de A.; Melo, Tomas J.A. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Teixeira Neto, Erico [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)

    2008-07-01

    The drilling fluids are essential to the operations of exploration of oil. The organoclays are widely used in the composition of the oil based drilling fluids and raw materials are of high value added. These clays can be obtained, traditionally, from bentonitic clay treated, in water, with ionic surfactants, however, non-ionic surfactants can be adsorbed on the surface of interlamelar bentonitic clay, naturally hydrophilic, making them organophilic. A pilot plant for production of organoclays was mounted in the Recycling Laboratory / UFCG. The bentonitic clay imported Cloisite Na{sup +R} was treated with a non-ionic surfactant in levels of 40, 50 and 60% in scale and bench-scale pilot. The commercial organoclay VG-69{sup R} was used as a standard for comparison of results. The clay obtained were characterized by X-ray diffraction, and Foster's swelling. The oil based fluids were prepared in accordance with the standards of PETROBRAS (N-22581 1997 and N-2259, 1997). Tests show that the characterization of organoclays have obtained intercalation of non-ionic surfactant with great expansion of layers of clay, with interlayer distances more significant than the clay trade, both on clay obtained in the laboratory scale as in clays obtained by pilot scale, with results very similar for both methods. It appears that it is possible the pilot-scale production of organoclays with equivalent quality produced in the laboratory scale and quality compatible with the clay used commercially. (author)

  19. Optimization of transesterification reaction conditions for the production of biodiesel from oil blend of castor bean and soybean; Otimizacao das condicoes reacionais de transesterizacao para producao de biodiesel a partir de mistura de oleos de mamona e soja

    Energy Technology Data Exchange (ETDEWEB)

    Lobato, Ana Katerine de Carvalho Lima; Lima, Milena Gouveia Oliveira de; Pontes, Luiz Antonio M.; Teixeira, Leonardo S.G. [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil); Almeida, Daniel Freire; Costa, Tales Santana Martins; Menezes; Mateus Della Cella; Santos, Iran Talis Viana; Almeida, Selmo Q. [Universidade Salvador (UNIFACS), BA (Brazil)

    2012-07-01

    Biodiesel is an alternative fuel to diesel oil, and industrially obtained by the transesterification of triglycerides of fatty acids from vegetable oils and/or animal fats. Currently, the main raw material used to produce biodiesel in Brazil is soybean oil. The inclusion of other raw materials from different cultures in this sector is important and aims to reduce dependence on a single oilseed, assign specific characteristics to the product and encourage the development of family farming. The use of blends of soybean oil and castor for biodiesel may prove an important strategy to minimize the negative effects and maximize the positives of each oilseed. In this work, we carried out an experimental study using full factorial design 2{sup 4}, to increase the conversion of esters, by conventional transesterification, using as feedstock a blend of oils containing 20% castor and 80% soybean. The aim of this study was to evaluate the influence of mixing ratio of oil: methanol, KOH concentration, temperature and reaction time in biodiesel production. It was found that the variation of these parameters affected the conversion of esters and quality of biodiesel produced. Conversions above 95% were obtained, and the best conversion was 99.05% at 25 deg C in a reaction time of 20 minutes using 2% KOH as a catalyst and a molar ratio methanol/oil 12:1. In order to reduce the costs of the process with respect to amount of methanol used without affecting the conversion of esters, we identified a second set of process conditions, which used the same conditions of temperature, reaction time and catalyst concentration and a different molar ratio methanol/oil (6:1) which gave a conversion of esters of 98.59%. (author)

  20. Impacts of fuel oil substitution by natural gas in a pipeline network scheduling; Impactos da substituicao do oleo combustivel por gas natural na programacao de uma rede de dutos

    Energy Technology Data Exchange (ETDEWEB)

    Souza Filho, Erito M.; Bahiense, Laura; Ferreira Filho, Virgilio J.M. [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil)

    2012-07-01

    In recent decades, due to the advancement and computational methods for solving optimization problems, the number of articles addressing the scheduling of products has grown. The mathematical models developed have proved useful to schedule from a single pipeline with multiple products to complex networks of multiple pipelines. Moreover, the planning of these activities is of even greater importance when considering the existence of new environmental requirements to be applied to production and marketing of petroleum products. An example of this paradigm shift is the reduction in fuel oil consumption due to increased share of natural gas in the Brazilian energy matrix. In this context, this paper proposes a mathematical model to obtain feasible solutions for problems of scheduling a network of pipelines considering replacing all or part of the demand for fuel oil to natural gas. We tested the model on three real instances of a multi commodity network consists of 4 terminals, 4 refineries and 8 unidirectional pipelines, considering a planning horizon of one week. (author)

  1. Assimilation of the QuikScat satellite data into models of oil spill path analysis; Assimilacao dos dados do satelite QuikScat em modelos de analise de trajetoria de derrames de oleo

    Energy Technology Data Exchange (ETDEWEB)

    Baptista, Marlos Carneiro; Cabral, Alexandre Pereira; Silva Junior, Carlos Leandro [OCEANSAT - Tecnologia Espacial para Monitoramento Ambiental S/C Ltda., Rio de Janeiro, RJ (Brazil)]. E-mail: oceansat@inc.coppe.ufrj.br; Landau, Luiz [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia]. E-mail: landau@lamce.ufrj.br

    2001-07-01

    This work analyses the performance and reliability of the wind data measured by the QuikScat satellite. The Scatterometer data was compared with previously published results, based on data from ERS-1/2 Wind Scatterometer, meteo-ocean buoys and from re-analysis of NCEP model. To validate and applied the QuikScat data a case study was performed, on which those data was used to improve the performance of an oil trajectory analysis model, simulating and oil spill in the Campos Basin region. It was observed that the results of the modelling reached better results when wind data collected by the QuikScat satellite was used as a forcing mechanism. Together with other applications, the assimilation of these data into models can be seen as an essential tool in environmental monitoring. (author)

  2. Quantitative chemical analysis for the standardization of copaiba oil by high resolution gas chromatography; Analise quimica quantitativa para a padronizacao do oleo de copaiba por cromatografia em fase gasosa de alta resolucao

    Energy Technology Data Exchange (ETDEWEB)

    Tappin, Marcelo R.R.; Pereira, Jislaine F.G.; Lima, Lucilene A.; Siani, Antonio C. [Farmanguinhos - Inst. de Tecnologia em Farmacos, Rio de Janeiro, RJ (Brazil)]. E-mail: siani@far.fiocruz.br; Mazzei, Jose L. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Escola de Quimica; Ramos, Monica F.S. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Faculdade de Farmacia. Dept. de Medicamentos

    2004-04-01

    Quantitative GC-FID was evaluated for analysis of methylated copaiba oils, using trans-(-)-caryophyllene or methyl copalate as external standards. Analytical curves showed good linearity and reproducibility in terms of correlation coefficients (0.9992 and 0.996, respectively) and relative standard deviation (< 3%). Quantification of sesquiterpenes and diterpenic acids were performed with each standard, separately. When compared with the integrator response normalization, the standardization was statistically similar for the case of methyl copalate, but the response of trans-(-)-caryophyllene was statistically (P < 0.05) different. This method showed to be suitable for classification and quality control of commercial samples of the oils. (author)

  3. Electric power and vegetable oil for the sustainable development of the Rio Ouro Preto, Rondonia, BR extractive reservation; Eletricidade e oleo vegetal para o desenvolvimento sustentavel da reserva extrativista do Rio Ouro Preto em Rondonia

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Ana Teresa Siqueira; Lascio, Marco Alfredo Di; Dias, Elizabete Moreira; Hutin, Jill Rochelle Anahita [Universidade de Brasilia (UnB), DF (Brazil). Faculdade de Tecnologia. Depto. de Eng. Eletrica]. E-mails: anateresa22@bol.com.br; marcodilascio@unb.br; bete.cead@gmail.com; bete.cead@gmail.com

    2006-07-01

    This article gives an option of sustainable development of the area, through the implementation of two small vegetable oil extraction industries, use of the residues for electric power generation, commercialization of ecological tourism products and two small furniture industries.

  4. Vegetable oil as fuel for electric power generation at Rondonia, BR, small agglomerate as way of revenue generation; Oleo vegetal como combustivel para energia eletrica em pequenos aglomerados de Rondonia como forma de geracao de renda

    Energy Technology Data Exchange (ETDEWEB)

    Moret, Artur de Souza [Fundacao Universidade Federal de Rondonia (UNIR), Porto Velho, RO (Brazil)]. E-mail: amoret@unir.br

    2006-07-01

    This text approaches the question energy having as based alternative combustible reference in vegetal oils and the Decentralized Generation of Energy, for attendance of isolated systems and with small load, having as conceptual base the partner-economic-ambient sustain ability, being the economic chain of the entailed and conditional energy to the ambient, social aspects, technician, politicians, financiers and economics. This text intends to demonstrate to the mechanisms used in a research and development project (P and D) for the determination and domain of energy generation, electricity and power, from vegetal oils of suitable oleaginous to the State of Rondonia for a Extractive Reserve. Having as reference the contribution for the local and sustainable development of isolated localities, for the generation of job and income, for the energy self-sufficiency of isolated localities and to make available alternative to the companies of the electric sector of energy availability of isolated communities. (author)

  5. Palm oil based polymer materials obtained by ROMP: study by low field NMR; Materiais polimericos obtidos via ROMP a partir de oleo de palma: estudo por RMN de baixo campo

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Henrique; Azevedo, Eduardo R. de; Lima-Neto, Benedito S., E-mail: benedito@iqsc.usp.br [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil)

    2015-07-01

    Aiming to study and develop new materials synthesized from sustainable sources, several polymers were prepared using in its monomeric composition, different amounts of NPO (Norbornenyl Palm Oil) monomer. This monomer was developed based on a vegetable oil rather produced in northern Brazil, the Palm Oil. Since this oil have a low content of unsaturation, its use in developing new monomer for ROMP (Ring-Opening Metathesis Polymerization) is not exploited. In this regard, polymeric materials were obtained using the NOP and both the reaction process and the resulting products were analyzed by Nuclear Magnetic Resonance in the time domain (TD-NMR) at low magnetic field. (author)

  6. Palm oil based polymer materials obtained by romp: study by low field NMR; Materiais polimericos obtidos via ROMP a partir de oleo de palma: estudo por RMN de baixo campo

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Henrique; Lima-Neto, Benedito S., E-mail: benedito@iqsc.usp.br [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Instituto de Quimica de; Azevedo, Eduardo R. de [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Instituto de Fisica

    2013-07-01

    Aiming to study and develop new materials synthesized from sustainable sources, several polymers were prepared using in its monomeric composition, different amounts of NPO (Norbornenyl Palm Oil) monomer. This monomer was developed based on a vegetable oil rather produced in northern Brazil, the Palm Oil. Since this oil have a low content of unsaturation, its use in developing new monomer for ROMP (Ring-Opening Metathesis Polymerization) is not exploited. In this regard, polymeric materials were obtained using the NOP and both the reaction process and the resulting products were analyzed by Nuclear Magnetic Resonance in the time domain (TD-NMR) at low magnetic field. (author)

  7. Economic analysis and performance of a low power diesel engine using soybean oil refined; Analise economica e de desempenho de um motor diesel de baixa potencia utilizando oleo de soja refinado

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Guilherme Ladeira dos; Fernandes, Haroldo Carlos; Alvarenga, Cleyton Batista de; Leite, Daniel Mariano; Siqueira, Wagner da Cunha [Universidade Federal de Vicosa (UFV), MG (Brazil). Dept. de Engenharia Agricola], E-mails: glsantos@yahoo.com.br, haroldo@ufv.br, cleyton.alvarenga@ufv.br, daniel.mariano@ufv.br, wagner.siqueira@ufv.br

    2011-07-01

    Oil is the main source of energy available to power internal combustion engines, enabling its transformation into mechanical energy. To meet the production of vegetable oils, many cultures can be used, according to regional conditions, especially those that are already commercially exploited, such as peanuts, Soybeans, Corn, Palm oil, Sunflower and Canola, and other public regional and castor oil, Andiroba, Pequi, Buriti, Inaja, Carnauba, Jatropha, among others. The objective of this work make an economic analysis of replacing diesel fuel by mixing and compare performance on the engine and using B{sub 2} biodiesel fuel mixture of diesel with 2 % Refined Soybean Oil (SAB). The loads applied by the dynamometer in the engine were 7, 9, 11, 13, 15, 17, 19 and 21.5 lbs. The engine was coupled to the dynamometer with the aid of pulleys and belts of the type V with gear ratio of 1:1,9. Apparently, the best vegetable oil mixture was 30 %, both in terms of specific consumption and cost from R$ kW{sup -1} h{sup -1}. Providing the same cost of pure diesel. (author)

  8. Yield oil of Jatropha curcas seeds of trees irrigated and fertilized with OMM-Tech; Rendimento de oleo de sementes de pinhao manso submetido a irrigacao e adubacao com OMM-Tech

    Energy Technology Data Exchange (ETDEWEB)

    Evangelista, Adao W.P.; Alves Junior, Jose; Barbosa, Ricardo A.F.; Frazao, Joaquim J.; Araujo, Fausto J.M. [Universidade Federal de Goias (UFG), Goiania, GO (Brazil). Escola de Agronomia e Engenharia de Alimentos. Setor de Engenharia Rural], E-mail: awpego@bol.com.br

    2010-07-01

    The purpose of this study was to evaluate the effects of irrigation and application of Organo-Minerals-Marine + Biotech (OMM-Tech) in yield oil of Jatropha curcas seeds. The experiment was conducted in an experimental area located in Federal University of Lavras, Brazil. A randomized block experimental design with subdivided parcels and three replications was used. The parcels were submitted to different OMM-Tech fertilizer application methods: T1 = control (no OMM-Tech); T2 = soil application (120 kg ha{sup -1} of OMM-Tech in a powder form); T3 = leaf application (OMM-Tech in a liquid form with a 5% concentration); T4 = soil + leaf application (60 kg ha{sup -1} of OMM-Tech in powder form + OMM-Tech in liquid form with a 2.5% concentration). The sub-plots received two different water management treatments: irrigated and no irrigated. A drip irrigation system with drippers spaced by 0.50 m was used. We evaluated yield oil of seeds in first production year. Jatropha trees irrigated showed a higher seeds oil yield than no irrigated trees. However, fertilization with OMM-Tech no influenced seed oil yield. Seeds oil yield of Jatropha trees irrigated was 34%, and no irrigated 27%. (author)

  9. Study of nanocomposites based polyurethanes obtained of the biodiesel from passion fruit with fiber cashew; Estudo de nanocompositos de poliuretanas obtidas do biodiesel do oleo de maracuja com a fibra de caju

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, B.R.S.; Breves, R.A.; Santos, M.A.; Lopes, R.V.V.; Macedo, J.L.; Ceschin, A.M.; Sales, M.J.A., E-mail: brendabetas2@gmail.com [Universidade de Brasilia (UnB), Brasilia, DF (Brazil)

    2014-07-01

    In this work, polyurethanes (PUs) prepared with polyol obtained of the biodiesel from passion fruit oil (BIPFO) and composites with cashew fiber 'in natura' were developed. The synthesis of polyol (PBIPFO) consisted in the epoxidation/hydroxylation of BIOM in one step, using performic acid generated 'in situ'. The instaurations the passion fruit oil (PFO) and the reactions of obtaining the BIOM and PBIOM were confirmed by nuclear magnetic resonance (NMR) {sup 1}H and infrared spectroscopy (FTIR). The PUs were prepared using PBIPFO with 4,4-diphenylmethane diisocyanate (MDI) at molar ratio [NCO]/[OH] of 1.5. PUs and composites were analyzed by FTIR, thermogravimetry (TG), derivative thermogravimetry (DTG) and dynamic mechanical analysis (DMA). The use of BIPFO as raw material to get PUs and composites with cashew fiber showed viability by success of the reactions throughout the process and properties of the materials obtained. (author)

  10. Evaluation of ensemble atmospheric simulations in oil dispersion models at Itaguai Port region; Avaliacao do uso de resultados numericos de previsao atmosferica por conjunto na modelagem da dispersao de oleo na regiao do Porto de Itaguai

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Renato Goncalves dos; Silva, Mariana P.R.; Silva, Ricardo Marcelo da; Torres Junior, Audalio R. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Lab. de Modelagem de Processos Marinhos e Atmosfericos (LAMMA); Landau, Luiz [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Lab. de Metodos Computacinais em Engenharia (LAMCE); Sa, Reginaldo Ventura de; Hochleitner, Fabio; Correa, Eduardo Barbosa [AQUAMET Meteorologia e Projeto de Sistemas, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This work discusses the use of numerical prediction using ensemble as boundary condition in pollutants dispersion models, applied in a hypothetical case of an oil spill occurrence in Itaguai Port. The Princeton Ocean Model (POM) has been used to simulate hydrodynamics and NICOIL Eulerian model to forecast oil spill dispersion, and ensemble wind forecast from Global Forecast System (GFS), aiming to assess the importance of this parameter variability in oil dispersion at sea. The wind scenarios using ensemble members has showed significant dispersion when compared to control simulation, demonstrating that the uncertainty in the atmospheric modeling can generate considerable variations in the placement of the final spot of oil. The region of interest was the Sepetiba Bay, located on the southern coast of the Rio de Janeiro state; because of port operations carried out around the Port of Itaguai where they can, eventually, oil leaks occur. (author)

  11. Ethanol pilot project: an energy alternative project for a total or partial substitution of fuel oil in thermoelectric generation plants; Projeto piloto do etanol - PPE: alternativa energetica para substituicao parcial ou total do oleo combustivel em plantas de geracao termoeletrica

    Energy Technology Data Exchange (ETDEWEB)

    Pessoa, Joao Simoes

    2004-07-01

    The actual stage of technological development is strongly dependent on wide use of petroleum combustibles, in which its trade market defines the rules of socio economical and geopolitics interdependencies. The economic growth has been driven by the 'readily available - cheap energy' stimulus, limiting studies on natural sources of energy (geothermal, solar) and development of renewable ones (bio combustibles). However, economical, financial crisis may change this scenario, and new opportunities for a change in the technological matrix and in technological structure might occur. In Brazil, the 'Agenda 21', especially the PPA - Applied Research Program in the Energetic Area, intend to develop case studies and implement 'pilots projects' to research conventional and renewable sources of energy, bringing to present the value of this project, developed between 1979 and 1980, to evaluate the technical feasibility of ethylic alcohol utilization as a complementary combustible or in a total substitute for the fuel oil in boilers of conventional thermoelectric generation plants. This work presents the performance of one of the Piratininga thermal power plant's boiler, as well as the main data acquired from direct experimentation and the characteristics of this plant, from the use of ethylic alcohol as a substitute of fuel oil. (author)

  12. Preparation and characterization of sulfated zirconia acid catalysts for application in the esterification of cottonseed oil; Preparacao e caracterizacao de catalisadores acidos de zirconia sulfatada para aplicacao na esterificacao do oleo de algodao

    Energy Technology Data Exchange (ETDEWEB)

    Silva, F. N.; Moura, T. F. B.; Silva, A.S.; Costa, A.C.F.M., E-mail: fnilson.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). Dept. de Ciencias Basicas

    2017-07-15

    This work aimed to produce zirconia by combustion synthesis, to analyze the structure and morphology comparatively with a commercial monoclinic ZrO{sub 2} , as well as, to investigate the sulfation, aiming to obtain acid catalysts for its use in the esterification of cotton oil for biodiesel. The samples were characterized by X-ray diffraction, scanning electron microscopy (SEM), specific surface area by BET method, infrared spectroscopy (FTIR), thermal analysis (TG/DrTG/DTA), granulometric distribution, pH and chromatography. The synthesized sample evidenced the formation of the monoclinic phase with traces of the orthorhombic phase, while in the commercial sample only the monoclinic phase was observed. In the sulfation process, traces of the tetragonal phase, typical of sulfated zirconia, were observed with the presence of the monoclinic phase in the two samples. With the impregnation of the sulfate ion on the surface of the samples, an increase in the particle size was observed, as seen in the characterization of BET, granulometric distribution and SEM, which also indicated a homogeneous morphology consisting of fine particles of approximately spherical shape for both samples. The chromatography indicated conversion of 65.5 and 91.8% in methyl esters to the synthesized and commercial SO{sub 4} {sup 2-}/ZrO{sub 2} , respectively. The results indicated that the sulfation increased the acidity, which was evidenced by the decrease in the pH, ranging from 5.12 to 2.65, which contributed significantly to the increase of the conversion, indicating that the SO{sub 4} {sup 2-}/ZrO{sub 2} is a promising catalyst in the esterification. (author)

  13. Regulation aspects of the restructuring of Argentine oil and gas sector. The Brazilian experiences; Aspectos regulatorios da reestruturacao do setor de oleo e gas argentino. Experiencias a observar no caso brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Luczynski, Estanislau; Paula, Claudio Paiva de [Sao Paulo Univ., SP (Brazil). Programa Interunidades de Pos-Graduacao em Energia]. E-mail: stasczenco@zipmail.com.br; clpaiva@mandic.com.br

    1999-07-01

    During the last years, some countries have reorganized their oil and gas sector. The reforms included the opening of national basins to exploration by foreign companies, and the association of a national oil company with a foreign one. Argentina was the first country in Latin America to reform its sector. The major action was the privatisation of YPF, in 1993. Some years later Brazil also begun the process of reforming the national oil and gas sector. The first step was promulgating a new petroleum law. This law created an agency to regulate the national sector during and after the reforms. The Brazilian restructuring model is based on the foreign ones. This paper aims at discussing whether or not the weakness those foreign models could be avoided. The idea is to learn from those experiences and to propose a national reform lead by the Brazilian society instead. (author)

  14. Behaviour of steel pipe exposed to fouling by heavy oil during core-annular flow; Comportamento de tubo de aco exposto a sujeira de oleo pesado durante escoamento nucleo-anular

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Adriana; Bannwart, Antonio C. [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Engenharia de Petroleo

    2004-07-01

    The use of water-assisted technologies such as core-annular flow to the pipelines of viscous oils has been proposed as an attractive alternative for production and transportation of heavy crudes in both onshore and offshore scenarios. Usually, core-annular flow can be created by injecting a relatively small water flow rate laterally in the pipe, so as to form a thin water annulus surrounding the viscous oil, which is pumped through the center. The reduction in friction losses obtained thanks to lubrication by water is significant, since the pressure drop in a steady state core flow becomes comparable to water flow only. For a complete assessment of core flow technology, however, unwanted effects associated with possible oil adhesion onto the pipe wall should be investigated, since these may cause severe fouling of the wall and pressure drop increase. It has been observed that oil adhesion on metallic surfaces may occur for certain types of crude and oilphilic pipe materials. In this work we present results of pressure drop monitoring during 35 hour-operation of a heavy oil-water core annular flow in a 26.08 mm. i.d. horizontal steel pipe. The oil used is described in terms of its main components and the results of static wet ability tests are also presented for comparison (author)

  15. Cost effective method for valuation of impacts caused by greenhouse gases emissions for oil and gas companies; Metodo de custo-efetividade para avaliacao de impactos causados pelas emissoes de gases de efeito estufa em empresas de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Carneiro, Elisa Vieira [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil); Barros, Sergio Ricardo da Silveira [Universidade Federal Fluminense (LATEC/UFF), Niteroi, RJ (Brazil). Mestrado em Sistemas de Gestao

    2012-07-01

    The objective of this work is to apply the method of cost-effectiveness in economic evaluation of new investment projects, based on information about reducing greenhouse gases emissions. In the context of the commitment of companies with the Climate Change and Sustainability, this work is important and contributes to the oil and gas industry, because it integrates information on reducing emissions of greenhouse gases in negative Net Present Value (NPV) projects, helping the portfolio manager on decision making between alternative projects. In this article, examples are given of two investment projects, in which the cost effectiveness methodology is applied, considering the reduction of emission of greenhouse gases such as additional environmental benefit, or cost avoidance, in an adjusted model of the economic viability analysis of meritorious projects. (author)

  16. Oil seepage detection technique as a tool to hydrocarbon prospecting in offshore Campos Basin-Brazil; Deteccao de exsudacoes de oleo como uma ferramenta de prospeccao de hidrocarbonetos na regiao maritima da Bacia de Campos - Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Castilho, Jose G.; Brito, Ademilson F. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Modelagem de Bacias (LAB2M); Landau, Luiz [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Metodos Computacionais em Engenharia (LAMCE)

    2004-07-01

    With a proven capacity to identify oil slicks in offshore regions, RADARSAT-1 imagery can be useful for oil exploration purposes. The paper discusses the seepage detection method at Campos Basin, offshore Rio de Janeiro State, which is responsible for 80% of the Brazilian production of oil and gas. It is known that the horizontal migration of petroleum can occurs over tens or even hundreds of kilometers, where the source rock placed in more deep locations can be linked with shallow reservoirs or traps and even reach the ocean. It means that seepage can provide information for risking petroleum charge at basin scales, and cannot have a direct relation with the geographical position of the interpreted seeps and possible filled prospects. A good understanding of the geology, and hence the petroleum systems of a basin is the key to use seepage in exploration. The work is divided into three main steps. First step were select oil seepages interpreted at Campos Basin where is found several giant petroleum fields. Second, the geology of the study area and its structural and stratigraphic features were analyzed, in order to identify possible migration pathways related to faults generated by halokinesis. Another important aspect is the presence of 'windows' or ducts in the evaporates beds allowing the contact between the section that contains source rocks and the turbidities reservoirs, that contain the majority of the oil discovers. All these features were interpreted based on a regional dip seismic line (203 - 76), and a geologic cross section with E-W orientation, showing the structure of the Marlim Field. Finally, all the information was integrated in a Geographical Information System (GIS), and then analyzed in an interdisciplinary environment, with the intention to link possible routes of oil migration to post-evaporites reservoirs or to interpreted seeps. (author)

  17. Polyurethane coating from prepolymers and Crambe oil polyesters in oxygenates and green solvents; Revestimento de poliuretano a partir de pre-polimeros e poliesteres de oleo de crambe em solventes oxigenados e verdes

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Elaine R.P.; Messaddeq, Younes, E-mail: elainerpp@yahoo.com.br [Universidade Estadual Paulista Julio de Mesquita Filho (IQ/UNESP), Araraquara, SP (Brazil). Instituto de Quimica; Polito, Wagner Luiz [Universidade de Sao Paulo (IQ/USP), Sao Carlos, SP (Brazil). Instituto de Quimica; Matinelli, Marcia [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Instituto de Quimica

    2015-07-01

    The PU coatings are extremely used in areas that require high-performance. For several applications PU resin, the solvent base is commonly used, the problem is the solvents with high content of volatile organic compounds (VCO) like: toluene, xylene, benzene, etc.. In this work, we were synthesized and characterized four kinds of prepolymers with low-VCO from renewable sources such as castor oil and crambe oil with oxygenate and green solvents. The PU prepolymers had been synthesized in the proportions NCO/OH 2:1 and 3:1. The curing process was carried out with atmospheric moisture in the films. Characterization was made from prepolymers, oligomers and polyesters and PU films by FTIR, TGA / DTA, NMR, GPC and GC-FID, besides this the coatings were applied on aluminum and glass plates and, subjected to analysis chamber saline, hardness and adhesion. The results indicated that the reaction occurred between the prepolymers with oligomers or polyesters, because disappearance of the NCO band at 2270 cm{sup -1}. The PU films showed good thermal stability (> 270 °C), high tensile strength and deformation. Surround the formulations, the PU films with HDI prepolymers showed the best results with polyesters from crambe oil (PEC 02 and PEC 03). (author)

  18. Primary energy balance of biodiesel production from palm oil for the conditions of Brazil and Colombia; Balanco energetico preliminar da producao do biodiesel de oleo de palma para as condicoes do Brasil e da Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Roselis Ester da; Lora, Electo Eduardo Silva [Universidade Federal de Itajuba (UNIFEI/MG), MG (Brazil)], Emails: roseliscosta@yahoo.com.br, electo@unifei.edu.br; Yanez, Edgar [Centro de Investigacion en Palma de Aceite (CENIPALMA), Bogota (Colombia)], Email: edgar.yanez@cenipalma.org; Torres, Ednildo Andrade [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil)], Email: ednildo@ufba.br

    2006-07-01

    The increasing related ambient concerns to the emissions of atmospheric pollutants for fuels, alternative sources of energy are having bigger attention, mainly those that contribute in the mitigation of these emissions. Being thus, the use of the biodiesel produced by the etherification of vegetal oils with methanol and ethanol, are seen as present interesting alternative. The energy analysis of the relation of the energy invested in the production of bio diesel can contribute as tool for a posterior formularization of pointers of the technician-economic and ambient viability in the comparison between the different oleaginous, as form to diagnosis one better type of culture for the production of biodiesel. The objectives of this work is to carry the energy analysis in the production of the palm oil biodiesel, for the conditions of Brazil and Colombia, as well as showing the differences between the results found for the two cases. The presented results are shown through comparative graphs for the two cases and with the final energy balance for each company. (author)

  19. Study of three-phase flow vertical patterns applied to the lift and transport of heavy oil; Estudo dos padroes de fluxo trifasico vertical aplicado a elevacao e transporte de oleos pesados

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Fernando Fabris; Bannwart, Antonio C. [Universidade Estadual de Campinas, SP (Brazil)

    2003-07-01

    The E and P activity has a great importance in the oil industry. First, it assesses hydrocarbon reserves that can be recovered in order to provide the highest revenues. Second, it supplies the forecast oil and gas production through adequate lift and transportation methods. These flows become rather difficult and requires high investments for heavy oils, which can be understood as having density larger than 934 kg/m{sup 3} (API grade smaller than about 20) and viscosity higher than 100 cP at reservoir conditions. In this work, the flow of a heavy crude oil and air mixture was made viable by injecting water in the pipe, in order to lubricate the flow and reduce pressure drop, as in the core flow technique. The main objective is to observe the three-phase flow patterns formed in the vertical pipe at different mixture compositions, for application in artificial lift. The oil flow rate was measured through a mass flow meter. Water and gas flow rates were given by rotameters. A high-speed VHS camera (1000 frames/s) attached to the pipeline was used to record the experiments for the determination of the final patterns. These are described and represented in flow maps. (author)

  20. Comparative analysis between horizontal and vertical heater treaters: identification and analysis of efficiency variables for oil treatment; Analise comparativa entre tratadores termicos horizontais e verticais: levantamento de variaveis criticas a eficiencia do processamento primario do oleo cru

    Energy Technology Data Exchange (ETDEWEB)

    Venancio, Fabricio de Queiroz; Ferreira, Doneivan Fernandes [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil)

    2012-07-01

    The Brazilian onshore oil and gas production scenario has undergone changes with the maturity of fields and the prioritization of investments towards offshore projects. Added to the issue of lack of investment issue, the increasing production of formation water, which has already exceeded the production of the oil itself. With that comes the need to study the efficiency of process stages. It is common to find oil treatment plants (ETOS) limiting production operations due to lack of capacity to deal with increasing volumes of produced water. The critical moment of an ETO in onshore operations is the 'breaking' of emulsion (water in oil) usually performed by heater treaters. This article offers a comparative analysis between horizontal (TTH) and vertical (TTV) heater treaters, indicating the main variables and demonstrating opportunities for internalization of traditional and innovative technologies in horizontal systems that result in energy efficiency, optimization of the specification of oil (for marketing) and reduced operating costs. (author)

  1. Vitamin B12-impaired metabolism produces apoptosis and Parkinson phenotype in rats expressing the transcobalamin-oleosin chimera in substantia nigra.

    Directory of Open Access Journals (Sweden)

    Carlos Enrique Orozco-Barrios

    Full Text Available BACKGROUND: Vitamin B12 is indispensable for proper brain functioning and cytosolic synthesis of S-adenosylmethionine. Whether its deficiency produces effects on viability and apoptosis of neurons remains unknown. There is a particular interest in investigating these effects in Parkinson disease where Levodopa treatment is known to increase the consumption of S-adenosylmethionine. To cause deprivation of vitamin B12, we have recently developed a cell model that produces decreased synthesis of S-adenosylmethionine by anchoring transcobalamin (TCII to the reticulum through its fusion with Oleosin (OLEO. METHODOLOGY: Gene constructs including transcobalamin-oleosin (TCII-OLEO and control constructs, green fluorescent protein-transcobalamin-oleosin (GFP-TCII-OLEO, oleosin-transcobalamin (OLEO-TCII, TCII and OLEO were used for expression in N1E-115 cells (mouse neuroblastoma and in substantia nigra of adult rats, using a targeted transfection with a Neurotensin polyplex system. We studied the viability and the apoptosis in the transfected cells and targeted tissue. The turning behavior was evaluated in the rats transfected with the different plasmids. PRINCIPAL FINDINGS: The transfection of N1E-115 cells by the TCII-OLEO-expressing plasmid significantly affected cell viability and increased immunoreactivity of cleaved Caspase-3. No change in propidium iodide uptake (used as a necrosis marker was observed. The transfected rats lost neurons immunoreactive to tyrosine hydroxylase. The expression of TCII-OLEO was observed in cells immunoreactive to tyrosine hydroxylase of the substantia nigra, with a superimposed expression of cleaved Caspase-3. These cellular and tissular effects were not observed with the control plasmids. Rats transfected with TCII-OLEO expressing plasmid presented with a significantly higher number of turns, compared with those transfected with the other plasmids. CONCLUSIONS/SIGNIFICANCE: In conclusion, the TCII-OLEO transfection

  2. Eficácia de herbicidas no controle de amarelinho (Tecoma stans em pastagem Herbicides efficiency on trumpetflower (Tecoma stans

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    Telma Passini

    1997-01-01

    Full Text Available Amarelinho (Tecoma stans é um arbusto exótico que foi observado como espécie invasora de past os degradados do Estado do Paraná-Brasil. A população dessa espécie forma um dossel denso sob o qual as forrageiras não se desenvolvem. Visando encontrar uma alternativa de controle químico, testou-se a eficiência da formulação comercial de 2,4-D + picloram e tebuthiuron, em experimentos separados. Com a formulação comercial de 2, 4-D + picloram preparou-se uma solução em água e em óleo lubrificante usado, nas concentrações de 4% e 10%. As soluções a 4% foram pinceladas no toco, imediatamente após o tronco ter sido cortado rente ao solo e, aquelas a 10%, pinceladas em tronco ferido com facão na base do tronco, sem eliminar a parte aérea. Tebuthiuron, em formulação granulada, foi aplicado nas doses de 2, 4, 6, 8, 10 e 20 g/ planta, sem eliminar a parte aérea. A formulação de 2,4 -D + picloram não matou as plantas de amarelinho que, aos cinco meses após tratadas, apresentavam brotações com 0, 74 a 1, 21 m de altura. A menor do sede tebuthiuron foi suficiente para matar as plantas num período de nove meses após a aplicação do herbicida.Trumpet flower (Tecoma stans is na exotic woody shrub observed as an invader of degraded pastures in the State of Parana - Brazil. The canopy of trumpetflower is so dense that no forage plants growunderneath. The chemical control of this weed was tested in two experiments, using the commercial formulation of 2,4-D + picloram and tebuthiuron. The former was prepared as a solution into water or lubricative used oil, at the concentrations of 4 and 10%. The solutions at 4% were used for painting the stumps immediatly after trunks had being cut off, close to the ground level. The solutions at 10% were used for painting the basal portion of the trunks, immediatly after damaging it with a machete close to the ground level. Tebuthiuron was used granulated at doses of 2, 4, 6, 8, 10 e 20 g

  3. 21 CFR 184.1317 - Garlic and its derivatives.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Garlic and its derivatives. 184.1317 Section 184... Listing of Specific Substances Affirmed as GRAS § 184.1317 Garlic and its derivatives. (a) Garlic is the... derivatives include essential oils, oleo-resins, and natural extractives obtained from garlic. (b) Garlic oil...

  4. Vegetable oils as lube basestocks: A review

    African Journals Online (AJOL)

    anjanas

    2013-02-27

    Feb 27, 2013 ... widespread use of natural oils and fats. Vegetable oils are promising candidates as base ... Synthetic esters form a large group of products, which can be either from petrochemical or oleo chemical ... In order to combine the environmental behavior and the technical properties of lubricants, a lot of countries ...

  5. Effects of Resin and Essential Oil from Commiphora myrrha Engl. on ...

    African Journals Online (AJOL)

    The oleo-gum-resin of Commiphora myrrha (Nees) Engl (syn. Commiphora molmol (Engl.) Engl. ex Tschirch) is used in the Ethiopian folkloric medicine for wound management. The present study was aimed at evaluating the wound healing properties of the essential oil and resin of C. myrrha using in vivo and in vitro ...

  6. 75 FR 38953 - Airworthiness Directives; BAE Systems (OPERATIONS) LIMITED Model BAe 146 and Avro 146-RJ Airplanes

    Science.gov (United States)

    2010-07-07

    ... oleo. The AD also provided an optional terminating action for the repetitive inspections, by embodiment... for the repetitive inspections, by embodiment of Messier-Dowty SB.146-32-150. As part of a recent... inspections, by embodiment of Messier-Dowty SB.146-32-150. As part of a recent accident investigation, the...

  7. Author Details

    African Journals Online (AJOL)

    Raeesdana, Azade. Vol 15, No 1 (2018) - Articles Chemical composition of essential oil and evaluation of acute and sub-acute toxicity of Dorema ammoniacum d. Don. Oleo-gum-resin in rats. Abstract PDF. ISSN: 0189-6016. AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors ...

  8. Antibacterial activity and chemical composition of essential oil of Lippia microphylla Cham =Atividade antibacteriana e composição química do óleo essencial de Lippia microphylla Cham

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    Fabiola Fernandes Galvão Rodrigues

    2011-04-01

    Full Text Available The essential oil from the fresh leaves of Lippia microphylla Cham. was obtained by hydrodistillation and characterized by gas chromatography-mass spectrometry (GC-MS. Major constituents of the oil were 1.8-cineole (18.12%, ƒÒ-ocimene (15.20%, bicyclogermacrene (11.63% and caryophyllene oxide (8.32%. Antimicrobial activity of the oil against Gram-positive and Gram-negative bacteria was determined by gel diffusion method. The oil showed good antibacterial activity against Shigella flexneri, Escherichia coli and Streptococcus pyogenes and very good antibacterial activity against Staphylococcus aureus.O oleo essencial das folhas frescas de Lippia microphylla Cham. foi obtido por hidrodestilacao e caracterizado por cromatografia gasosa acoplada a espectrometria de massas (CG-EM. O constituinte majoritario do oleo foi 1.8-cineol (18,12%, ƒÒ-ocimeno (15,20%, bicyclogermacreno (11,63% e oxido de caryophylleno (8,32%. A atividade antimicrobiana do oleo frente as bacterias Gram-positivas e Gramnegativas foi determinada pelo metodo de difusao em gel. O oleo apresentou uma boa atividade antibacteriana frente a Shigella flexneri, Escherichia coli e Streptococcus pyogenes sendo o melhor resultado frente a Staphylococcus aureus.

  9. Chemical content of the seeds and physico-chemical characteristic

    African Journals Online (AJOL)

    Coccinia grandis) to 1.5 (Citrullus colochinths). The ideal oleo-proteaginious seeds would be the one containing as much oils as protein, which would correspond to ratio R1 = 1. This ideal value of. R1 was found in Cucumis metilerus (R1 = 1).

  10. Recursos vegetais usados por Acromyrmex striatus (Roger (Hymenoptera, Formicidae em restinga da Praia da Joaquina, Florianópolis, Santa Catarina, Brasil Vegetable resources used by Acromyrmex striatus (Roger (Hymenoptera, Formicidae in sand dunes at Joaquina Beach, Florianópolis, Santa Catarina State, Brazil

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    Benedito C. Lopes

    2005-06-01

    Full Text Available Foram amostrados 400 ninhos de Acromyrmex striatus entre 1997 e 1998, nas dunas da praia da Joaquina, Florianópolis, SC, para a verificação do material vegetal trazido para o ninho. Estas formigas usam partes de 50 espécies de plantas dispostas em 22 famílias, sendo as principais, representantes de Compositae, Gramineae e Leguminosae. Nesta última família, Stylosanthes viscosa foi a espécie mais utilizada nos dois anos de amostragem. Acromyrmex striatus corta matéria vegetal fresca, bem como se utiliza de material vegetal já caído, podendo, então se comportar como cortadeira ou como uma espécie oportunista.A total of 400 nests of Acromyrmex striatus (Roger, 1863 was evaluated between 1997 and 1998 at the dunes of the Joaquina Beach, Florianópolis, Santa Catarina State, in order to determine the vegetable substrate brought back to the nests. These ants use some parts of 50 plant species in 22 botanical families, being Compositae, Gramineae and Leguminosae the principal ones. In this last family, Stylosanthes viscosa Swartz was the most herbivored species in the two years samplings. Acromyrmex striatus cut fresh vegetables, as well as use decayed materials, being then a true leaf-cutter ant or a opportunistic ant.

  11. Efecto del flujo turbulento, la condición superficial, la presencia de ácido acético y un compuesto orgánico usado como inhibidor de corrosión sobre la cinética electroquímica del acero api 5l x52 en soluciones con co2 disuelto /

    OpenAIRE

    Olvera Martínez, María Elena

    2012-01-01

     tesis que para obtener el grado de Doctorado en Ingeniería, presenta Maria Elena Olvera Martinez ; asesor Juan Mendoza Flores310 páginas : ilustracionesDoctorado en Ingeniería UNAM, Facultad de Química, 2012

  12. A geographic information system and multi criteria analysis method for site selection of spent nuclear fuel disposal; Metodologia baseada em sistemas de informacao geografica e analise multicriterio para a selecao de areas para a construcao de um repositorio para o combustivel nuclear usado

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Vivian Borges

    2009-07-01

    This thesis aims to develop a site selection methodology for the construction of final repository for the spent nuclear fuel disposal, by using geographic information systems (GIS) and multi-criteria decision analysis. Decision making processes of this kind are often complex, given the great number of space parameters to consider and also the typically conflicting opinions of the diverse stake holders. By using GIS, data from different space parameters can be quickly and reliably stored, treated and analyzed. Multi-criteria techniques allow for the incorporation of different stake holders' opinions. These tools, when jointly used, allow for the decision process to be more transparent, quick and reliable. The method developed was applied to the particular case of the state of Rio de Janeiro. Weights obtained from an expert panel and also by using the Hierarchical Analysis Method and cartographic data were combined in the GIS. The application showed that it is possible not only to select and classify areas as to their aptness for the proposed objective, but also to exclude those clearly inadequate areas, thus optimizing the selection process by reducing the search space and consequently minimizing costs and the time spent in the search. (author)

  13. Radionuclides used in nuclear medicine ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) in sewage system and in the marine environment of Rio de Janeiro city, RJ, Brazil; Radionuclideos usados em medicina nuclear ({sup 131}I, {sup 99m}Tc e {sup 99}Tc) no sistema de esgoto e no ambiente marinho da cidade do Rio de Janeiro, RJ

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Daniele Santos de

    2014-08-01

    The nuclear medicine is a specialty that uses radioisotopes for diagnostic or therapeutic purpose. In Brazil there are around 340 Nuclear Medicine Services (NMS), 27 of them, are located in the city of Rio de Janeiro. The most widely used radionuclides in the country are {sup 131}I and {sup 99m}Tc. The radionuclide {sup 99m}Tc decays to {sup 99}Tc, which is a beta emitter with a long half-life (10{sup 5} years). The aim of this study is to perform a survey to estimate the {sup 131}I and {sup 99}Tc discharged levels at the Canal do Cunha, the main pathways for environmental dispersion and evaluate the radiological impact to non-human biota and to the populations exposed to these radionuclides. The Alegria Station receives sewage from most clinics of Rio de Janeiro mid was therefore chosen as a study case. The station receives approximately 4.50 x 10{sup 5} Bq/year of {sup 99}Tc e 7.12 x 10{sup 12} Bq/year of {sup 131}I. After passing through all stages of treatment, the effluent is discharged into the Canal do Cunha and flows into the Guanabara Bay. To assess the radiological impact of these radionuclide discharges, a comparative study was made considering three computational models: the CROM, which is based on a model of the International Atomic Energy Agency (IAEA), the PC-CREAM, widely used by the European Union and the GENII, which is the most widely used model in the United States. Two exposure scenarios were considered: 1 - people that bathe directly in the discharge of the effluent; 2 - community living 1200 meters from the discharge point, bathing in the river and consuming local fish. Concentration and doses values for the scenarios according to the applicability of each computer code were estimated. The dose values at the discharge point were 7.47 x 10{sup -6}mSv for {sup 131}I and 2.87 x 10{sup -14} mSv for {sup 99}Tc, while for scenario II the value of the total dose was approximately 10{sup -1} mSv/year for {sup 131}I and 10{sup -10} mSv/year for {sup 99}Tc, and fish consumption is the main responsible for the dose. An analysis by gamma spectrometry was carry out for determination of {sup 131} I concentration in samples from the treatment plant. The {sup 99m}Tc was qualitatively detected in samples of affluent, effluent and sludge. {sup 131}I was detected only in the sludge with the value of 9.03 Bq/kg that would result in a dose of 4.33 x 10{sup -5} mSv/year for the plant workers. The impact of radionuclide releases on biota indicated zooplankton as the species receiving the highest dose (2.35 µGy/year). The results obtained by the radionuclide determinations in the samples of affluent-sludge effluent, although in insufficient numbers for a more assertive statement, indicate that the assessed data for radionuclide releases from the clinics and subsequently, radionuclide entrances into the plant treatment may have been overestimated: or the clinics do not use all the radionuclide authorized activities or significant losses of radionuclides in the sewer system may be occurring. According to the results, the release of radiopharmaceuticals discharged into Canal Cunha would not be an exempt practice. However, a larger number of samples should be collected for a better assessment of the environmental impact. (author)

  14. Bulas de medicamentos usados por idosos com hipertensão: adequação da informação à regulamentação sanitária e possíveis implicações para a saúde Medication leaflets used by elderly with hypertension: adequacy of information for sanitary regulation and possible implications for health

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    Divaldo Pereira de Lyra Junior

    2010-09-01

    Full Text Available As bulas representam a principal fonte de informação escrita fornecida aos pacientes, especialmente aos idosos. O presente trabalho visou analisar o conteúdo das bulas dos medicamentos frequentemente prescritos para idosos com hipertensão, bem como a sua adequação à regulamentação sanitária e possíveis implicações para a saúde. Foi realizado um estudo descritivo em duas etapas: etapa A, em julho de 2002, e B em julho de 2007. Em cada etapa foram analisadas 34 bulas de sete fármacos anti-hipertensivos que constam na Relação Nacional de Medicamentos Essenciais (2006. Entre as 68 bulas analisadas, a maioria não continha todas as informações exigidas pela Portaria n° 110/1997 na etapa A (89,5% e pela RDC n°140/2003 na B (100%. Alguns itens importantes como via de administração, modo de uso e superdose não constavam em 76% das bulas analisadas. A falta dessas informações é relevante para a segurança dos pacientes. Com base nos dados obtidos, foi possível constatar o não cumprimento da legislação vigente nas duas etapas do estudo. Logo, é necessária maior atuação da Anvisa para assegurar o uso racional dos medicamentos e a redução dos riscos à saúde dos idosos.The medication leaflets represent the main source of written information supplied to the patients, in special to the elderly. This study aimed to analyze the content of the leaflets of drugs often prescribed for elderly people with hypertension, as well as their adequacy to the sanitary regulations and possible health implications. A descriptive study was conducted in two stages: A, in July 2002, and B, in July 2007. In each stage were analyzed 34 medication leaflets of seven antihypertensive drugs of the National Essential Drugs List (2006. Among the 68 leaflets analyzed, most did not contain all the information required by Portaria nº 110/1997 (89.5% in the stage A and the RDC nº 140/2003 (100% in B. In 100% of the leaflets, the legislation had not been fulfilled. Some important topics as way of administration, how to use and overdose had been absent in 76% of the leaflets, the lack of this information has an impact in the security of the antihypertensive users. Based on these data, it was possible to evidence inadequate contents of the medication leaflets. So, it is necessary greater surveillance by Anvisa, to ensure the rational use of medicines and the reduction of the risks to the elderly health.

  15. Avaliação de cápsulas de cerâmica e instrumentos de medida de tensão usados em tensiômetros Evaluation of ceramic capsules and instruments of tension measurement used in tensiometers

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    Neuzo B. de Moraes

    2006-03-01

    Full Text Available O objetivo deste trabalho foi avaliar a eficiência de cápsulas de cerâmica procedentes do Estado do Ceará e dos Estados Unidos e testar o desempenho do transdutor de pressão acoplado a um tensiômetro de câmara de ar em condições de campo, em duas profundidades diferentes, na quantificação do potencial matricial da água no solo, em comparação com tensiômetros de manômetro de mercúrio. O trabalho de campo foi realizado em Mossoró, RN, utilizando o delineamento experimental de blocos ao acaso, com repetições, no esquema fatorial 2 x 2 x 2, sendo eles: procedência das cápsulas; medidor de tensão e profundidades. Realizaram-se medidas pelo período de 40 dias consecutivos e se verificou que nos testes de campo a origem das cápsulas proporcionou iguais valores de tensão, embora as cápsulas do Ceará apresentassem condutância maior que as dos Estados Unidos. Os valores de tensão, obtidos pelos instrumentos de medidas de tensão, apresentaram diferença estatística, embora a diferença esteja dentro da precisão (1,0 kPa. Existe alta correlação (R² = 0,93 entre as tensões obtidas com os dois instrumentos de medida de tensão.The objective of this work was to evaluate the efficiency of ceramic capsules from the State of Ceara, Brazil, and from the United States, as well as, to test the performance of the pressure transducer coupled in the air chamber tensiometer in field conditions, in two different depths, in the quantification of the matricial potential of the water in the soil, in comparison with those of the conventional tensiometers (mercury manometer. The field work was accomplished in Mossoró, in the State of Rio Grande do Norte, Brazil, using a 2 x 2 x 2 experimental design in completely randomized blocks the factor being: origin of the capsules; tension measurement and depths. Measurements were accomplished in a period of 40 consecutive days. It was verified that in the field tests the origin of the capsules provided same tension values, although the capsules from Ceara state presented higher conductance than the ones from USA. The tension values obtained by the instruments of tension measurements differed statistically, although the difference was within the precision (1.0 kPa. A high correlation exists among the tensions obtained by the two instruments of tension measurement.

  16. Effect of the exposure time in coke making atmosphere on the microstructure and properties of a refractory castable used in the petrochemical industry; Efeito do tempo de exposicao a uma atmosfera coqueificante na microestrutura e nas propriedades de um concreto refratario usado na industria petroquimica

    Energy Technology Data Exchange (ETDEWEB)

    Cabrelon, M.D.; Pereira, A.H.A.; Rodrigues, J.A., E-mail: marcelodezena@gmail.com [Grupo de Engenharia de Microestrutura de Materiais - GEMM, Departamento de Engenharia de Materiais - DEMa, Universidade Federal de S. Carlos - UFSCar, Sao Carlos, SP (Brazil); Medeiros, J. [CENPES, Petroleo Brasileiro S/A - PETROBRAS, Rio de Janeiro, RJ (Brazil); Toledo-Filho, R.D. [Laboratorio de Estruturas e Materiais - LABEST, COPPE, UFRJ, Rio de Janeiro, RJ (Brazil)

    2012-04-15

    Refractory castables used in Fluidized Catalytic Cracking Units (FCCU) are said to deteriorate due coke formation during the production of light hydrocarbons, causing a shortening in the operating time of the reactor. Consequently, a significant financial loss for the petrochemical will occur. Several studies have been carried out, but none of them showed clearly how much is the contribution of the coke for the concrete final deterioration. It still remains the doubt if the coke is the responsible for the damage observed macroscopically in a FCCU's riser. In this way, this work aimed to study the effect of the time in a coke making atmosphere on an anti-erosive class-C refractory castable, seeking for microstructural changes or on physical properties that indicate degradation mechanisms and give support to the understanding of the phenomenon. Samples of an industrial refractory castable used in petrochemical units were prepared and subjected to a forced coke making process in a simulation reactor. The temperature and the heating rate were kept constant at 540 deg C and 50 deg C/h, respectively. The values of 10, 60, 120, 240 and 480 h were used for the time of exposition to the propene gas. The microstructure of the samples was characterized through optical and scanning electron microscopy and its mineralogical phases through X-ray diffraction. Complementary analyses were necessary to a better understanding of the phenomenon. The results show that the surface and the microstructure are gradually impregnated by coke, which fills up pores, microcracks and cracks. Evidences of microcracking around the coke filled pores were not found. However, many aggregates present some type of deterioration related to the time of exposition to propene. Those damages are not necessarily caused by coke directly (author)

  17. Determinação de herbicidas usados no cultivo de arroz irrigado na região sul do estado de Santa Catarina através da SPME-GC-ECD Determination of herbicides used in irrigated rice cultivation in the south of Santa Catarina using SPME-GC-ECD

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    Léa L. F. Costa

    2008-01-01

    Full Text Available Evaluation of the pollution by the herbicides alachlor, propanil and atrazine in water samples from four rivers in the cities of Turvo and Meleiro, south of Santa Catarina State, was made using the SPME-GC-ECD method. The proposed method was optimized and validated. The correlation coefficients were higher than 0.997 and linear ranges of the analytical curves were 0.1-4; 0.1-2.5 and 0.1-5 µg L-1 for atrazine, alachlor and propanil, respectively. The herbicides were quantified by GC-ECD and identified by GC-MS. Both of the selected rivers presented contamination by at least one of the studied herbicides.

  18. Estudo comparativo da biocompatibilidade da submucosa intestinal porcina e pericárdio bovino usados como enxertos na veia cava de cães Comparative study of the biocompatibility of the porcine intestinal submucosa and bovine pericardium used as grafts in the inferior cava vein of dogs

    Directory of Open Access Journals (Sweden)

    Fernando Hintz Greca

    2005-08-01

    Full Text Available OBJETIVO: Comparar a biocompatibilidade entre submucosa de intestino delgado (SID porcino e o pericárdio bovino como enxerto no reparo de lesões criadas na veia cava inferior de cães. MÉTODOS: Dezesseis cães foram submetidos a laparotomia. Após a abertura da cavidade abdominal a veia cava foi identificada e em seguida procedeu-se com a retirada de um segmento elíptico de 1,5X3cm de sua parede anterior. Em 8 animais o defeito foi reparado com SID porcino (grupo A e nos 8 animais restantes o defeito foi reparado com pericárdio bovino (grupo B.No 30° dia de P.O. realizou-se uma ultra-sonografia e a eutanásia foi realizada no 40°dia de pós-operatório. RESULTADOS: Observou-se estenose da veia cava em 1 cão do grupo do grupo A e em 2 animais do grupo B além de trombose em 1 cão desse mesmo grupo. A análise microscópica revelou um processo inflamatório crônico moderado em ambos os grupos. A endotelização do enxerto, regeneração de fibras musculares lisas e depósito de colágeno também foi similar nos 2 grupos estudados. CONCLUSÃO: A SID provou ser um excelente substrato para a regeneração vascular quando implantado em veia cava superior, contudo os resultados encontrados não diferem daqueles observados com o uso de pericárdio bovino.PURPOSE: To compare the biocompatibility of the bovine pericardium and the small intestine submucosa (SIS when used to repair a created defect in the inferior vena cava of dogs. METHODS: Sixteen male mongrel dogs were submitted to a midline laparotomy incision. An elliptical segment (1,5 X 3,0 cm of the inferior vena cava, below the renal veins, was excised. In 8 dogs, the A group, a patch of porcine small bowel submucosa was used to repair the defect. In the 8 remaining dogs, the B group, a bovine pericardium was implanted in the vena cava. On the 30th post-operative day an ultrasound was performed in order to identify stenosis. The euthanasia was accomplished in the 40th post-operative day. Stenosis of the vein was observed in 1 dog of A group and in 2 of the B group. RESULTS: Partial thrombosis with collateral circulation was evidenced in 1 dog of the bovine pericardium group. A moderated chronic inflammatory process was evidenced in both groups. Microscopic evaluation, regarding endothelization of the implant, collagen deposition, smooth muscle growth, was similar in both groups. CONCLUSION: SIS proved to be a functional graft patch for possessing local vena cava remodeling and its biocompatibility was similar to bovine pericardium.

  19. Expressão de caracteres de tubérculos em função do tamanho de recipiente usado no cultivo de batata na geração de plântulas Expression of tuber traits as a function of pot size used to grow potato seedlings

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    Mario Alvaro Aloisio Verissimo

    2012-12-01

    Full Text Available No melhoramento genético de batata, para alguns caracteres, é possível eliminar genótipos inferiores já nas gerações iniciais, o que permite reduzir o número de genótipos avaliados a campo, proporcionando redução de custos. O objetivo deste trabalho foi verificar a influência do tamanho de vaso na expressão de caracteres de tubérculo, em famílias de batata, na geração de plântula. Em casa de vegetação, dez famílias de batata foram avaliadas em dois tamanhos de recipientes, vaso grande (1 L e vaso pequeno (250 ml. Os caracteres de tubérculos avaliados foram: cor, aspereza, profundidade de olho, sobrancelha, formato, uniformidade de formato, apontamento, curvatura, achatamento, aparência geral, massa por planta, massa média e número de tubérculos. O vaso grande proporciona maior expressão da variação genética para os caracteres profundidade de olho, sobrancelha, curvatura, achatamento, aparência geral e todos os componentes de rendimento. As maiores médias de produção de tubérculos em número, tamanho e massa foram obtidas no vaso grande, enquanto o maior coeficiente de variação genético para os caracteres formato, uniformidade de formato e apontamento de tubérculo foi obtido no vaso pequeno.In potato breeding, the exclusion of inferior genotypes by selection in early generations provides more versatility and cost reduction. The objective of this study was to evaluate the influence of pot size on the expression of tuber traits in potato families grown as seedling generation. Ten potato families were planted in two pot sizes, large (1 L and small (250 ml, in the greenhouse. The following tuber traits were evaluated: color, roughness, depth of eye, eyebrow, shape, uniformity of shape, pointing, curvature, flattening, tuber general appearance, total mass per plant, average tuber weight and number of tubers. The larger pot provided greater expression of genetic variation for the depth of eye, eyebrow, curvature, flattening, and tuber general appearance of all yield components. Higher means for tuber number, tuber size and tuber mass were obtained in larger pots, while higher genetic coefficient of variation for tuber shape, uniformity of shape and tuber pointing were observed in the small pots.

  20. Caracterização dos argilominerais usados em matéria-prima cerâmica, da formação Rio do Rasto, Bacia do Paraná, no município de Turvo, SC Characterization of clay minerals used in the ceramic industry, from Rio do Rasto formation, Paraná basin, exploitation in Turvo, SC, Brazil

    Directory of Open Access Journals (Sweden)

    J. A. Costa

    2010-12-01

    Full Text Available No sudeste de Santa Catarina existem inúmeras minas de exploração de argilas destinadas à indústria cerâmica da região. Para o conhecimento desta matéria prima foi realizada a caracterização em detalhe de uma frente de lavra em atividade. A exploração é realizada em terrenos sedimentares da Formação Rio do Rasto (Permiano Superior na Bacia do Paraná que afloram como morros testemunho. Foram coletadas quatorze amostras representativas dos níveis desta mina composta de argilitos com intercalação de siltitos de pequena espessura. As amostras foram analisadas por difratometria de raios X pelo método do pó na rocha total e na fração In the southeastern part of Santa Catarina state, Brazil, many mines of clays used as raw material for the ceramic industry are found. A detail study of this material was developed in a mine in activity. The exploitation of clays is held in sedimentary rocks of Rio do Rasto Formation (Upper Permian in the Paraná Basin. The outcrops are in hills testimonies. Fourteen samples were collected and represent the levels of this mine which consisted of argillites with intercalation of slim siltite layer. These samples were analyzed by X-ray diffraction using the powder method and in the fraction < 4 µm. The chemical composition was determined by X-ray fluorescence spectrometer. Petrographic observations in thin section were also performed. Scanning electron microscope images was obtained in samples fragments by secondary electron method. Electron microprobe microanalysis was performed in one thin section. The results showed large vertical variation in the mineralogy and it has been identified three different levels. Up to 2.00 m there is a predominance of smectite. Between 5.50 m 2.00 m the smectite is the main clay mineral, but with significant amounts of illite/mica and above 5.50 m occurs large increase in K-feldspar and detrital mica. Studies in detail by X-ray diffraction (determination of the b-parameter and microanalysis by wavelength dispersive X-ray spectroscopy have identified montmorillonite clay mineral as the smectite mineral specie.

  1. Selectivity of phytosanitary products used in organic farming on adult of Cryptolaemus montrouzieri (Coleoptera, Coccinellidae under laboratory conditionsSeletividade de produtos fitossanitários, usados no sistema de produção orgânica, sobre adultos de Cryptolaemus montrouzieri (Coleoptera, Coccinellidae, em laboratório

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    Cláudia Bernardes Ourique

    2011-10-01

    Full Text Available The association of pesticides with biological control is possible only if they provide some selectivity to natural enemies. In the organic production system the effect of insecticides on beneficial insects has not been extensively studied. Thus, this study aimed to evaluate in laboratory conditions the effect of pesticides used in this system on the adults of the predator Cryptolaemus montrouzieri Mulsant (Coleoptera, Coccinellidae. We used four treatments, which corresponded to four multiple values (0.25x, 0.5x, 2x and 1x of the concentration recommended by manufacturers of the following products: Rotenat CE®, Pironat®, Biopirol 7M®, Organic Neem®, Natuneem® and lime sulfur, which were tested in C. montrouzieri by topical application and residual exposure. None of the products, at any concentrations tested, had a significant effect on the survival of adults of C. montrouzieri, what did not differ from the distilled water control, showing that the products tested are selective to the adults of this species. However, other forms of exposure and evaluation methods must be studied.A associação do controle biológico com produtos fitossanitários só é possível se estes apresentarem alguma seletividade aos inimigos naturais. No sistema de produção orgânica, o efeito de inseticidas sobre insetos benéficos não tem sido extensivamente estudado. Assim, este trabalho objetivou avaliar em laboratório o efeito de produtos fitossanitários utilizados neste sistema, sobre adultos do predador Cryptolaemus montrouzieri Mulsant (Coleoptera, Coccinellidae. Foram utilizados quatro tratamentos, os quais corresponderam quatro múltiplos (0,25x, 0,5x, 1x e 2x da concentração recomendada pelos fabricantes dos seguintes produtos comerciais: Rotenat CE®, Pironat®, Biopirol 7M®, Organic neem®, Natuneem® e calda sulfocálcica, que foram testados sobre C. montrouzieri por aplicação tópica e exposição a resíduos. Nenhum dos produtos, em qualquer das concentrações testadas, apresentou efeito significativo sobre a sobrevivência de adultos de C. montrouzieri, não diferindo da testemunha água destilada, demonstrando que os produtos testados são seletivos aos adultos dessa espécie.

  2. A utilização da gaseificação de pneus usados em leito fluidizado para a produção de energéticos Gasification of used tires in fluidized bed reactor to produce energy sources

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    Eduardo A. Goulart

    1999-12-01

    Full Text Available O crescimento das grandes cidades, da industrialização e do consumo, tem orçado a civilização a conviver com um processo mais intenso de degradação do meio ambiente, ameaçando os recursos naturais e energéticos, além da maior produção de resíduos sólidos, líquidos e gasosos. Isto tem trazido preocupação com relação à sustentabilidade do processo de crescimento das economias mundiais e ao futuro dos recursos esgotáveis. Desta forma, torna-se essencial a utilização de combustíveis obtidos a partir de fontes renováveis ou dos resíduos gerados pela atividade industrial e pelas cidades. Alguns dos resíduos mais representativos do processo de crescimento dos centros urbanos são os pneus automotivos que descartados sem quaisquer cuidados trazem sérias consequências ao meio ambiente e às populações. Com este objetivo apresentamos a proposta de processamento desse resíduo através da gaseificação em um reator de leito fluidizado. Os sub-produtos deste processamento possuem elevado potencial de reutilização na indústria, quer seja como insumos de processos produtivos (negro de fumo presente nas cinzas, quer seja como energéticos (voláteis e o óleo obtido a partir da condensação dos vapores da gaseificação. Este último sub-produto apresenta boas qualidades como combustível (seu PCI é de cerca de 40 MJ/kg. Este trabalho apresenta alguns dos resultados obtidos em tais experimentos.The growth of the big cities, industrialization and goods consumptions, have forced the civilization to live with more intensive environmental degradation process, threatening both the nature and energy resources, besides the bigger production of gas, liquid and solid wastes. Any energy planning aims to minimize the wastes production as well as to stimulate both the waste and the sub-products re-utilization in the several industrial processes. In order to contribute to the solution of those problems, it is presented in this work, a proposal of a reactor which uses scrap tires to fuel oil using the gasification process.

  3. Physico-chemical analysis of the bricks used in the construction of the pyramid of the archaeological zone of Comalcalco, Tabasco; Analisis fisico-quimico de los ladrillos usados en la construccion de la piramide de la zona arqueologica de Comalcalco, Tabasco

    Energy Technology Data Exchange (ETDEWEB)

    Custodio G, E.; Acosta A, M. [Universidad Juarez Autonoma de Tabasco, 86680 Tabasco (Mexico); Sebastian, P.J. [CIE-UNAM, 62580 Temixco, Morelos (Mexico); Trevino P, C.G. [INAOE, 72000 Puebla (Mexico); Mendoza A, D. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2005-07-01

    The presence of clay as human hand craft is first observed in Mexico on westernmost city of the Maya region, known as Comalcalco, therefore Comalcalco comes from the nahuatl: Comali- cali-co or 'Brick house'. This city that flourish on the classical period between the centuries I b.C. to IX a.C, was contemporary to Palenque and Yaxchilan among others. Due to the lack of rocks for construction and abundance of clay in the region, the Mayas used the clay as fired clay bricks to build their palaces and ceremonial temples. On this work, we present a study using Sem, EDS and XRD on the fired clay bricks used on these constructions to induce de type clay used and temperature of firing. (Author)

  4. Colorimetric test for the monitoring of microcystins in cyanobacterial culture and environmental samples from southeast - Brazil Teste colorimétrico usado para o monitoramento de microcistina em cultivo de cianobactérias e em amostras de florações ambientais do sudeste do Brasil

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    Vanessa P.S. Almeida

    2006-06-01

    Full Text Available Microcystins are hepatotoxic heptapeptides produced by some cyanobacterial genera under determined physico-chemical conditions in the environment, which are responsible for the intoxication and death of animals and humans. The detection of microcystins in potable water or recreational water is not carried out routinely in the majority of Brazilian states. The protein phosphatase 1 (PP1 inhibition test is a simple, rapid and reproducible colorimetric method. The applicability of the PP1 inhibition test was tested using Microcystis aeruginosa (strain 1, UFRJ- toxin producer grown under controlled light and temperature condition (12/12h light/dark using 30 muE.m².s-1 at 23ºC in a bioreactor. The total concentrations of P (24, 6 and 4 muM and Fe (4 and 1 muM were varied in ASM-1medium and their effects on the growth rates and toxin production were analyzed. A standard curve of PP1 inhibition by microcystin-LR reached detection limit of 0.01 ng.mL-1. Under the highest concentrations of P (24 muM and Fe (4 muM, the production of microcystin was detected throughout the growth experiment. The highest concentration of microcystin was observed at 6 muM P while at 1 muM Fe, PP1 inhibition was not detected. Samples from environmental blooms in water reservoirs used for human and animal consumption, from southeast Brazil (Belo Horizonte/MG, were tested and quantified for microcystin presence by the PP1 colorimetric test. The concentration of microcystin varied from undetectable to 100 ng.mL-1 in the environmental samples with Microcistis flos-aquae as the predominant cyanobacterial strain.Microcistinas (MC são heptapeptídeos de ação neuro e hepatotóxica produzidas por alguns gêneros de cianobactérias em determinadas condições físico-químicas do ambiente e são responsáveis pela morte e intoxicação de animais e humanos. A detecção de MC em água destinada ao consumo no Brasil ainda não é realizada na maioria dos estados brasileiros. O teste de inibição de proteína fosfatase tipo 1 (PP1 por MC é um método colorimétrico simples, rápido e de boa reprodutibilidade. Para testar a aplicação do teste PP1 foram realizados estudos de crescimento de cianobactérias em bioreator com meio ASM-1 dentro de condições controladas de crescimento (12/12h luz/escuro usando 30 miE.m².s-1 de intensidade luminosa e temperatura constante de 23C utilizando Microcystis aeruginosa (estirpe 1., UFRJ- produtor de MC. Variaram-se as concentrações de fósforo (P em 24, 6 e 4 miM e de ferro (Fe em 4 e 1mM. Uma curva padrão de inibição de PP1 pela MC-LR foi construída, tendo como limite de detecção 0.01 ng.mL-1. Em meio normal de crescimento (24 miM P e 4 miM Fe para Microcystis aeruginosa, a produção de MC foi detectada continuamente durante o crescimento da cultura. A maior concentração de MC foi observada na concentração de 6 miM P e não foi detectada na concentração de 1 miM Fe. Amostras de florações ambientais, da região sudeste do Brasil (Belo Horizonte/MG, coletadas em corpos d'água utilizados para abastecimento e consumo humano, foram testadas e quantificadas para a presença de microcistina pelo teste colorimétrico PP1. A concentração de microcistina variou entre quantidades não detectáveis pelo método até 100 ng.mL-1 em amostras de floração da espécie Microcistis flos-aquae.

  5. Effect of the welding process on the microstructure and microhardness of API 5L X80 steel welded joint used for oil transportation pipeline; Efeito do processo de soldagem sobre a microestrutura e a microdureza de juntas soldadas de aco API 5L X80 usado em tubulacoes para transporte de petroleo

    Energy Technology Data Exchange (ETDEWEB)

    Alves, R.T.P.; Albuquerque, S.F. [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Maciel, T.M.; Almeida, D.M.; Santos, M.A.

    2008-07-01

    This study had as objective to evaluate the microstructure and microhardness of API 5L X80 steel welded joints, used for pipelines to transport oil and gas, using the Shield Metal Arc Welding process with pre- heating temperature of 200 deg C and 400 deg C and the AWS E8010G electrode as filler metal. For this, besides the microhardness of the welded joint, the weld metals percentiles of micro-constituents and of columnar and regenerated grains and the medium size and extension of the heat affected zone were evaluated. The percentage of acicular ferrite in weld metal ranged from 13% to 33% which generated values of microhardness from 114 HV to 309 HV. (author)

  6. Evaluation of the performance of different plastics used to seal nylon cDNA arrays Avaliação da performance de diferentes plásticos usados para selar arranjos de cDNA em náilon

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    Antônio Paulino da Costa Netto

    2009-01-01

    Full Text Available cDNA arrays are a powerful tool for discovering gene expression patterns. Nylon arrays have the advantage that they can be re-used several times. A key issue in high throughput gene expression analysis is sensitivity. In the case of nylon arrays, signal detection can be affected by the plastic bags used to keep membranes humid. In this study, we evaluated the effect of five types of plastics on the radioactive transmittance, number of genes with a signal above the background, and data variability. A polyethylene plastic bag 69 μm thick had a strong shielding effect that blocked 68.7% of the radioactive signal. The shielding effect on transmittance decreased the number of detected genes and increased the data variability. Other plastics which were thinner gave better results. Although plastics made from polyvinylidene chloride, polyvinyl chloride (both 13 μm thick and polyethylene (29 and 7 μm thick showed different levels of transmittance, they all gave similarly good performances. Polyvinylidene chloride and polyethylene 29 mm thick were the plastics of choice because of their easy handling. For other types of plastics, it is advisable to run a simple check on their performance in order to obtain the maximum information from nylon cDNA arrays.Os arranjos de cDNA são uma poderosa ferramenta para o estudo de padrões de expressão gênica. Os arranjos em membranas de náilon apresentam ainda a vantagem de poderem ser reutilizados diversas vezes. Porém, um ponto bastante delicado em estudos de expressão gênica em larga escala é a sensibilidade. No caso de arranjos em membranas de náilon, a detecção dos sinais pode ser afetada pelo envoltório plástico utilizado para manter as membranas úmidas. Nesse estudo, nós avaliamos os efeitos de cinco tipos de plásticos na transmissão radioativa detectada, no número de genes com sinal acima da emissão de fundo e na variabilidade dos dados. O plástico produzido com polietileno com 69 μm de espessura apresentou uma forte interferência na emissão radioativa, bloqueando 68.7% do sinal detectado. Este bloqueio na transmitância diminuiu o numero de genes detectados e aumentou a variabilidade dos dados. Outros plásticos mais finos tiveram resultados melhores. Apesar de plásticos feitos de cloreto de polivinilideno e cloreto de polivinila (ambos com 13 μm de espessura e polietileno (29 e 7 μm de espessura terem diferentes níveis de transmitância, todos apresentaram performances semelhantes nos testes realizados. Cloreto de polivinilideno e polietileno com 29 μm de espessura foram os plásticos escolhidos devido à facilidade de manuseio. Para outros tipos de plásticos, é recomendável realizar um teste de suas performances antes de utilizá-los para envolver membranas de náilon, de forma a obter o máximo de informação dos experimentos com arranjos de cDNA.

  7. Mathematical model to estimate of the deterioration of wooden poles in contact with soil used in rural areas Modelo matemático para estimativa da deterioração de postes de madeira em contato com o solo usados em áreas rurais

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    Julio C. Molina

    2011-10-01

    Full Text Available In São Paulo State, mainly in rural areas, the utilization of wooden poles is observed for different purposes. In this context, wood in contact with the ground presents faster deterioration, which is generally associated to environmental factors and, especially to the presence of fungi and insects. With the use of mathematical models, the useful life of wooden structures can be predicted by obtaining "climatic indexes" to indicate, comparatively among the areas studied, which have more or less tendency to fungi and insects attacks. In this work, by using climatological data of several cities at São Paulo State, a simplified mathematical model was obtained to measure the aggressiveness of the wood in contact with the soil.No Estado de São Paulo, principalmente em áreas rurais, é notável a utilização de postes roliços de madeira para diversas finalidades. Neste contexto, observa-se que a madeira, em contato com o solo, deteriora-se mais rapidamente, e essa deterioração está geralmente associada aos fatores ambientais e, principalmente, à presença de insetos e fungos. Com o auxílio de modelos matemáticos, pode ser prevista a vida útil das estruturas de madeira pela obtenção de "índices climáticos", que indicam comparativamente, entre as regiões estudadas, quais possuem maiores e menores propensões ao ataque de fungos e insetos. Neste trabalho, utilizando dados climatológicos de várias cidades do Estado de São Paulo, foi obtido um modelo matemático simplificado de agressividade à madeira em contato com o solo.

  8. Coeficientes de difusão de metais em materiais não convencionais (agarose e acetato de celulose usados na técnica de difusão em filmes finos por gradientes de concentração

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    Camila Destro Colaço

    2012-01-01

    Full Text Available The DGT technique allows one to measure quantitatively free and labile metal species in aquatic systems. Nevertheless, for this approach, knowledge is required of the diffusion coefficients of the analytes in a diffusive layer. In this study, the diffusion coefficients of Hg(II, As(III, Mn(II, Mg(II, Cu(II, Cd(II were determined in agarose gel and those of Ba(II, Cd(II, Cu(II, Mg(II, Mn(II e Zn(II in cellulose acetate membranes. These materials presented good performance and the reported results can be used as a data base for further DGT studies.

  9. Adição de molibdênio ao inoculante turfoso com bactérias diazotróficas usado em duas cultivares de arroz irrigado Addition of molybdenum in peat innoculum with diazotrophic bacteria used in two rice cultivars

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    Salomão Lima Guimarães

    2007-03-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito da utilização de bactérias diazotróficas com ou sem molibdênio em duas cultivares de arroz com diferentes potenciais de fixação biológica de nitrogênio. Dois experimentos foram montados: o primeiro foi conduzido em condições gnotobióticas, com utilização das estirpes BR 11417 (ZAE94 - Herbaspirillum seropedicae e BR 11340 (M130 - Burkholderia sp., duas doses de molibdênio, 1,12 e 2,25 g, e duas fontes, molibdato de sódio e molibdato de amônio. As sementes foram peletizadas com inoculante turfoso com bactérias diazotróficas e o molibdênio. Em seguida as cultivares foram plantadas em tubos de ensaio com capacidade para 120 mL com 60 mL da solução de Hoagland sem nitrogênio por 30 dias. Foi avaliada a matéria seca das plantas. O segundo experimento foi conduzido em vasos em casa de vegetação, com as mesmas estirpes e dosagens de molibdênio. Foram avaliados a produção e o N total dos grãos. O delineamento estatístico foi inteiramente casualizado com quatro repetições e quatro plantas por vaso. Foram observados aumentos na produção de grãos nas cultivares IR42 e IAC4440 de 88 e 57%, respectivamente, com a adição ao inoculante turfoso, das estirpes ZAE94 e M130 com molibdênio.The objective of this work was to evaluate the effect of the inoculation of diazotrophic bacteria associated with the molybdenum in two rice cultivars. Two experiments were performed: the first one was lead under gnotobiotics conditions, using Herbaspirillum seropedicae, strain BR 11417 and Burkholderia sp., strain BR 11340, two doses of molybdenum (1.12 and 2.25 g and two different sources of Mo - sodium molybdate and ammonium molybdate. The seeds were pelleted with peat containing diazotrophic bacteria and molybdenum. After inoculations were seeds planted in to test tubes with capacity for 120 mL content 60 mL Hoagland solution without nitrogen. Seedlings were harvested after 30 days and plant dry weight was evaluated. The second experiment was held in greenhouse with the same strains, sources and amount of molybdenum. The production and the total N of the rice grains were evaluated. Statistical design was completely randomized with four replication and four plants per pot were planted. Grain production increased with the inoculation in the cultivars IR42 and IAC4440 up to 88 and 57%, respectively.

  10. Optimization of radiation protection for an electron accelerator used in paint cure in films approved by Brazilian Nuclear Energy Commission - CNEN, Rio de Janeiro, Brazil; Otimizacao da radioprotecao para um acelerador de eletrons usado em cura de tinta em filmes aprovado pela CNEN

    Energy Technology Data Exchange (ETDEWEB)

    Rios, Denise A. da S.; Sordi, Gian Maria A.A., E-mail: denise@inovafi.com.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2014-07-01

    This study aims to evaluate the radiological protection system in an installation where there is a self-shielded accelerator Category I, used for paint curing in polymer films, in order to optimize it in situations in which it is appropriate. For this a radiometric survey was conducted in the designated areas to check rate doses at different distances from the radiation focus, in which there is a possibility of presence or persons which can reliably detect any abnormality in the accelerator operation. The comparison of the obtained values related to the accelerator operating current with the natural background radiation showed that they are compatible, signaling that the principle of optimization is already being followed.

  11. Estudo de materiais calcários usados como corretivos do solo no Estado de São Paulo. II - Composição química Chemical composition of limestones employed in neutralizing soil acidity in the State of São Paulo

    Directory of Open Access Journals (Sweden)

    Bernardo van Raij

    1968-01-01

    Full Text Available Foram feitas determinações de óxido de cálcio (CaO, óxido de magnésio (MgO, sesquióxidos (R203, perda ao fogo (P.F., resíduo insolúvel (R.I., umidade (H20, poder de neutralização (P.N. de 16 calcários sedimentares, 11 calcários metamórficos, 1 calcário magmático e 2 escórias de siderurgia, materias utilzados como corretivos do solo no Estado de São Paulo.The contents of CaO, MgO, R2O3, loss of ignition, insoluble residue and the neutralization value of 29 limestones and 2 siderurgy slags employed in the neutralization of soil acidity in the State of São Paulo were determined. The results showed that most of the limestones studied belonged to the dolomitic type. The neutralization value was higher in the samples containing higher percentage of CaO plus MgO.

  12. Effect of the exposure time in coke making atmosphere on the microstructure and properties of a refractory castable used in the petrochemical industry; Efeito do tempo de exposicao a uma atmosfera coqueificante na microestrutura e nas propriedades de um concreto refratario usado na industria petroquimica

    Energy Technology Data Exchange (ETDEWEB)

    Cabrelon, M. D.; Pereira, A. H.A.; Rodrigues, J.A., E-mail: marcelodezena@gmail.com [Grupo de Engenharia de Microestrutura de Materiais - GEMM, Departamento de Engenharia de Materiais - DEMa, Universidade Federal de S. Carlos - UFSCar, Sao Carlos, SP (Brazil); Medeiros, J. [CENPES, Petroleo Brasileiro S/A - PETROBRAS, Rio de Janeiro, RJ (Brazil); Toledo-Filho, R. D. [Laboratorio de Estruturas e Materiais - LABEST, COPPE, UFRJ, Rio de Janeiro, RJ (Brazil)

    2012-04-15

    Refractory castables used in Fluidized Catalytic Cracking Units (FCCU) are said to deteriorate due coke formation during the production of light hydrocarbons, causing a shortening in the operating time of the reactor. Consequently, a significant financial loss for the petrochemical will occur. Several studies have been carried out, but none of them showed clearly how much is the contribution of the coke for the concrete final deterioration. It still remains the doubt if the coke is the responsible for the damage observed macroscopically in a FCCU's riser. In this way, this work aimed to study the effect of the time in a coke making atmosphere on an anti-erosive class-C refractory castable, seeking for microstructural changes or on physical properties that indicate degradation mechanisms and give support to the understanding of the phenomenon. Samples of an industrial refractory castable used in petrochemical units were prepared and subjected to a forced coke making process in a simulation reactor. The temperature and the heating rate were kept constant at 540 deg C and 50 deg C/h, respectively. The values of 10, 60, 120, 240 and 480 h were used for the time of exposition to the propene gas. The microstructure of the samples was characterized through optical and scanning electron microscopy and its mineralogical phases through X-ray diffraction. Complementary analyses were necessary to a better understanding of the phenomenon. The results show that the surface and the microstructure are gradually impregnated by coke, which fills up pores, microcracks and cracks. Evidences of microcracking around the coke filled pores were not found. However, many aggregates present some type of deterioration related to the time of exposition to propene. Those damages are not necessarily caused by coke directly (author)

  13. Characteristics of a tractor engine using mineral and biodiesel fuels blended with rapeseed oil Características de um motor de trator alimentado com combustíveis mineral e biodisel misturados com óleo de colza

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    Tone Godeša

    2010-10-01

    Full Text Available One of the most unfavourable characteristics of crude vegetable oil when used as the fuel is the high viscosity. To improve this weakness, oil can be blended with mineral diesel or biodiesel fuels. This study was designed to evaluate how the use of mineral diesel or biodiesel blend with cold pressed rapeseed (Brassica napus oil affects the engine power, torque and fuel consumption. A tractor equipped with direct injection, water cooling system and three-cylinder diesel engine was used for the experiment. Fuels used were standard diesel fuel (diesel, rapeseed oil methyl ester - biodiesel (B100 and their mixtures with 10, 30 and 50 vol. % of cold pressed rapeseed oil (RO. Increased portion of RO in diesel fuel blends had almost no effect on the torque measured on the tractor PTO shaft; it however decreased the maximal power. Fuel blends with B100 and rising RO content (up to 50% gave a positive correlation with maximal torque and power. By increasing the portion of RO from 0 to 50%, the minimal specific fuel consumption increased by 6.65% with diesel and decreased by 2.98% with B100 based fuel.Uma das características mais desfavoráveis dos óleos vegetais crus usados como combustível é a alta viscosidade. Para melhorar este ponto fraco, o óleo pode ser misturado com diesel mineral ou biodiesel. Este estudo foi desenvolvido para avaliar como o uso de diesel mineral ou biodiesel misturado a oleo de colza (Brassica napus extraído por pressão a frio afeta a potência do motor, o torque e o consumo de combustível, empregando um trator equipado com injeção direta, sistema de refrigeração de água e um motor de três cilindros. Os combustíveis utilizados foram o diesel padrão (diesel, éster metílico de óleo de sementes de colza - biodiesel (B100 e suas misturas com 10, 30 e 50 % vol. de óleo de semente de colza pressionado a frio (RO. Maiores proporções de RO nas misturas de diesel praticamente não tiveram efeito sobre o torque

  14. Composition of essential oils from the leaves of six species of the Baccharis genus from 'campos de altitude' of the atlantic forest of Sao Paulo; Composicao quimica dos oleos essenciais das folhas de seis especies do genero Baccharis de 'campos de altitude' da Mata Atlantica Paulista

    Energy Technology Data Exchange (ETDEWEB)

    Lago, Joao Henrique G.; Romoff, Paulete; Favero, Oriana A. [Universidade Presbiteriana Mackenzie, Sao Paulo, SP (Brazil). Centro de Ciencias e Humanidades]. E-mail: joaolago@mackenzie.com.br; Soares, Marisi G.; Baraldi, Patricia T.; Correa, Arlene G. [Universidade Federal de Sao Carlos (UFSCAR), SP (Brazil). Dept. de Quimica; Souza, Fatima O. [Instituto de Botanica, Sao Paulo, SP (Brazil). Secao de Curadoria do Herbario

    2008-07-01

    The essential oils from the leaves of six species of the Baccharis genus (B. dracunculifolia, B. microdonta, B. regnelli, B. schultzii, B. trimera, and B. uncinella), collected in the 'Campos de Altitude' of the Atlantic Forest (SP), were extracted using hydrodistillation procedures and analyzed by GC and GC/MS. There was a predominance of sesquiterpenes in all studied oils as {beta}-elemene in B. dracunculifolia and B. regnelli, {alpha}-humulene in B. trimera, {gamma}-gurjunene in B. schultzii, bicyclogermacrene in B. regnelli, {delta}-cadinene in B. regnelli and B. uncinella, spathulenol in B. schultzii, caryophyllene oxide in B. microdonta and guaiol in B. uncinella. However, a high amount of monoterpenes was also observed in B. uncinella ({alpha}-pinene), B. regnelli ({delta}-car-3-ene) and B. schultzii (limonene). The chemical compounds of the essential oils of B. schultzii, B. regnelli and B. microdonta are described for the first time in this work. (author)

  15. Epoxidation of soybean oil with [MoO{sub 2}(acac){sub 2}]/TBHP Catalytic system in [bmim][PF{sub 6}]; Epoxidacao do oleo de soja com o sistema catalitico [MoO{sub 2}(acac){sub 2}]/TBHP em [bmim][PF{sub 6}

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Maritana [Instituto Federal de Educacao, Ciencia e Tecnologia Sul-rio-grandense, Pelotas, RS (Brazil); Martinelli, Marcia, E-mail: maritana@pelotas.ifsul.edu.br [Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil). Inst. de Quimica. Dept. de Quimica Inorganica

    2012-07-01

    Epoxidation of soybean oil was investigated using 1-n-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF{sub 6}] ionic liquid as biphasic medium with molybdenum(VI) acetylacetonate complex and tert-butyl hydroperoxide TBHP as oxidizing agent. Reaction conditions were molar ratio TBHP:number of double bonds of oil:catalyst of 100:100:1, reaction temperature of 60 deg C and reaction time between 2 and 24 h. The proposed system showed catalytic activity for epoxidation reactions under tested conditions. Reuse of ionic liquid/catalyst system for epoxidation reactions was also investigated. Evaluation of epoxidation observed in this catalytic system was done by quantitative {sup 1}H NMR data. (author)

  16. Surface activity evaluation of an arabinose ester as water/oil demulsifier at severe conditions of temperature, salinity and pH; Avaliacao da atividade superficial de um ester de arabinose, como desemulsificante agua/oleo, em condicoes severas de temperatura, salinidade e pH

    Energy Technology Data Exchange (ETDEWEB)

    Borges, Mauricio Rodrigues; Garcia, Rosangela Balaban; Santos, Jaciara Alves dos; Vieira, Mariane; Silva, Luciana Carvalho; Campos, Viviane de Oliveira; Silva, Rayane Araujo da; Santos, Telma Pitanga dos [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    This work had for objective to compare the superficial properties of an arabinose ester, no-ionic, nontoxic, biodegradable, with two commercial products: the first one based on sodium dodecyl sulfate and the second one based on poly-oxy alkylene phenol formaldehyde. The arabinose ester was synthesized on the Petroleum Research Laboratory - UFRN, through enzymatic catalysis by protease from Bacillus subtilis, using arabinose and vegetable oil, in organic medium. In previous work [1], this sugar ester was evaluated as a possible water/oil demulsifier and the results were compared with the results of the commercial product based on poly-oxy alkylene phenol formaldehyde, showing that, for certain reaction conditions, the sugar ester presented better acting (71%) that the commercial product (33%) as demulsifier. In this work, the stability of this arabinose ester was evaluated in severe conditions of temperature, salinity and pH, through superficial tests in a tensiometer, using Wilhelmy plate method and the results were compared with the results obtained for two commercial products above mentioned. (author)

  17. Influence of the milling process on the structure and morphology of ZnAl{sub 2}O{sub 4} and catalytic performance in the methyl transesterification reaction of soybean oil; Influencia do processo de moagem na estrutura e morfologia de ZnAl{sub 2}O{sub 4} e no desempenho catalitico na reacao de transesterificacao metilica do oleo de soja

    Energy Technology Data Exchange (ETDEWEB)

    Feitosa, A.C.; Dantas, B.B.; Santana, A.; Costa, A.C.M.F., E-mail: alexcaval2@hotmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais; Costa, D.B. [Universidade Federal de Alagoas (UFAL), Maceio, AL (Brazil). Departamento de Quimica

    2012-07-01

    This work aimed to evaluate the effect of milling time over the structure and morphology of ZnAl{sub 2}O{sub 4}, synthesized by combustion reaction, and study the effect of milled samples over the methyl transesterification reaction of soy bean oil. ZnAl{sub 2}O{sub 4} was synthesizing, by means combustion reaction, using a electrical resistance plate. The powder was milled over 15, 30, 45 and 60 minutes and the samples were characterized by X-ray diffraction, scanning electron micrograph, particle size distribution and N{sub 2} adsorption isotherms. Milling process promoted changes over the agglomerate size and textural characteristics of the samples. Catalytic tests were conducted at 160 deg C, with 1% of catalyst, with molar ratio oil:methanol of 1:6 and reaction time of 1 hour. According the results, the sample milled over 30 minutes showed the highest conversion. (author)

  18. Synthesis of ceramics membranes using ZrO{sub 2} obtained by Pechini method aiming it application in oil/water separation; Sintese de membranas ceramicas utilizando ZrO{sub 2} obtido pelo metodo Pechini visando sua aplicacao na separacao oleo/agua

    Energy Technology Data Exchange (ETDEWEB)

    Maia, D.F.; Lira, H.L.; Vilar, M.A.; Costa, A.C.F.M.; Oliveira, J.B.L.; Kiminami, R.H.G.A.; Gama, L.

    2004-07-01

    The water produced in the oil production presents emulsified oil drops of difficult separation causing problems in the reinjection and the discarding. The conventional methods used in the separation oil/water don't clean all the water with efficiency and low cost. Thus, the ceramic membranes appear as a new option for being material very resistant chemistry and thermal, of high perm selective and high efficiency in use in processes of micro filtration and ultrafiltration separation. The zirconia is considered an adequate material to obtain of such membranes and the Pechini method is one promising technique in the attainment of after ultrafine with controlled characteristics. Thus the objective of this work was to prepare ceramic membranes from after synthesized by the Pechini method. The results had shown that the Pechini method was efficient in the attainment of ZrO{sub 2} powder, nanometric, with size of crystal of 7,2 nm and with average diameter of agglomerated 4,94{mu}, indicating that this material can be used in the attainment of membranes of micro filtration and ultrafiltration, adjusted to the separation oil/water The micrographs of the obtained membranes show a homogeneous surface where if it can visualize pores uniformly distributed. (author)

  19. Oil use of the effluent plant ETEO (Effluent Station of Oil Treatment) as combustible for generation of energy in the power plant UG-50Hz; Utulizacao de oleo da ETEO (Estacao de Tratamento de Efluentes Oleosos) para geracao de energia na UG-50Hz

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Jose Francisco de; Nascimento, Jose Maria do; Silva, Luiz Antonio da; Salazar, Marcos Vinicios; Baptista, Reinaldo Lopes; Barros, Sueli Aguiar [Companhia Siderurgica Nacional (CSN), Volta Redonda, RJ (Brazil)

    2009-11-01

    The areas of finishing products of CSN Steel Plant generate contaminated effluents with oil and grease , that are treated in ETEO (Effluent Station of Oil Treatment). In this plant, the oil is processed to be sold for the consuming market. However, some seasons of the year, the market does not absorb the oil, and CSN is obliged to defray the burning of this oil, to not interrupt the productive process and cause an environmental impact. Because of this situation, we search alternatives for the viable use of this oil inside CSN steel plant, taking care for the security of the processes and the impact to the environment. This paper describes the details of the work and the implantation of the burning of this oil of the ETEO with BPF oil (type of petrochemical oil) as combustible in the boiler 7 of the power plant UG 50 Hz. For the implantation of this project, operational contingencies of security for equipment was prepared . Moreover, the work included chemical analyses of the oil and the conditions of the boiler using this mixing of oils. The reached results demonstrate the total viability of this project and it was proved another alternative of the use of this residue, with reduction of the fuel costs , steam costs and the electric energy generated in the power plant of CSN. (author)

  20. The impacts of mega discoveries of oil and natural gas in the pre-salt Santos Basin: Brazil 2000 - 2030 - 2050; Os impactos das mega descobertas de oleo e gas natural no pre-sal da Bacia de Santos: Brasil 2000 - 2030 - 2050

    Energy Technology Data Exchange (ETDEWEB)

    Bahia, Raymundo Ruy; Reis, Lucio Eduardo Solano [Universidade da Amazonia (GEPEE/UNAMA), Belem, PA (Brazil). Nucleo de Socio-economia. Grupo de Estudos e Pesquisas Economicas Energeticas], e-mail: ruybahia@uol.com.br, e-mail: lereis2000@gmail.com

    2008-07-01

    This paper is a follow-up of four papers presented at the V CBPE 2006 e XI CBE 2006 updating the investment needs to expand the electric energy (EE) Offer. Such analysis revealed an hydro matrix over cost investments of 293 bi US$ (10bi US$/year) as compared to the hydro thermo matrix. Such data proof the unviability to supply the Southern, Southeastern and Central-West regions demand with Amazonian hydroelectricity. Furthermore, evaluations about the impacts of the huge underestimate volumes of proved reserves of oil and NG of 20 Gboe from the Projects Tupi, Carioca and Parati and Jupiter discoveries are limited to a small geographic area of 15,000 sqkm (122 x 122 km) that is only 9 percent of the Pre-Salt total area of 160,000 sqkm supporting the hypothesis of 160 Gboe for the ultimate ROR for both Campos and Pre-Salt Basins plus all others exploratory fronts offshore and onshore. In this probable case the mid-points of oil and NG will migrate to the 2070 year. Under these circumstances either scenarios will support the oil and NG self-sufficiencies for those regions Southern, Southeastern and Central-West regions, up to the 2050 year and probably extended to the 2070 year. The estimated volume of the potential proved reserve NG Jupiter Project is also underestimate but large enough (7,0 Gboe = 1,100 billion of cubic meter= Gmc) to supply 80 percent (80 GW) of the total 101 GW expansion offer of EE up to the 2030 year. Finally there is not a single good reason to justify the supply the EE demand of the Southern, Southeastern and Central-West regions with the unviable Amazonian hydroelectricity. (author)

  1. Determination of volume fraction in biphasic flows oil-gas and water-gas using artificial neural network and gamma densitometry; Determinacao de fracoes de volume em fluxos bifasicos oleo-gas e agua-gas utilizando redes neurais artificiais e densitometria gama

    Energy Technology Data Exchange (ETDEWEB)

    Peixoto, Philippe Netto Belache

    2016-07-01

    This study presents a methodology based on the principles of gamma ray attenuation to identify volume fractions in biphasic systems composed of oil-gas-water and gas which are found in the offshore oil industry. This methodology is based on the acknowledgment counts per second on the photopeak energy using a detection system composed of a NaI (Tl) detector, a source of {sup 137}Cs without collimation positioned at 180 ° relative to the detector on a smooth stratified flow regime. The mathematical modeling for computational simulation using the code MCNP-X was performed using the experimental measurements of the detector characteristics (energy resolution and efficiency), characteristics of the material water and oil (density and coefficient attenuation) and measurement of the volume fractions. To predict these fractions were used artificial neural networks (ANNs), and to obtain an adequate training the ANNs for the prediction of volume fractions were simulated a larger number of volume fractions in MCNP-X. The experimental data were used in the set data necessary for validation of ANNs and the data generated using the computer code MCNP-X were used in training and test sets of the ANNs. Were used ANNs of type feed-forward Multilayer Perceptron (MLP) and analyzed two functions of training, Levenberg-Marquardt (LM) and gradient descent with momentum (GDM), both using the Backpropagation training algorithm. The ANNs identified correctly the volume fractions of the multiphase system with mean relative errors lower than 1.21 %, enabling the application of this methodology for this purpose. (author)

  2. The possibility of recurrent selection to increase the oil content in soybeans using genetic male sterility and NMR spectroscopy; Possibilidade de selecao recorrente para aumento do teor de oleo em soja com a utilizacao da macho-esterilidade genetica e da espectroscopia de ressonancia nuclear magnetica

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, M A.C. de; Teixeira, J P.F.; Mascarenhas, H A.A. [Instituto Agronomico de Campinas, SP (Brazil); Rettori, C [Universidade Estadual de Campinas, SP (Brazil). Inst. de Fisica

    1990-12-31

    The seed oil content of male sterile plants and their progenies was analysed by a NMR spectroscope to study the possibility of recurrent selection to improve the oil content. The results suggest the possibility of recurrent selection in the composite IAC-1 both in the field with male sterile plants or at the greenhouse when selection is based on average values of progenies. 30 refs., 3 figs., 3 tabs.

  3. Effects of the use of soybean oil and animal fat in the diet of laying hens on production performance and egg quality Efeito do uso de oleo de soja e gordura animal na dieta de poedeiras sobre desempenho produtivo e qualidade do ovo

    Directory of Open Access Journals (Sweden)

    Daniela Duarte de Oliveira

    2011-10-01

    Full Text Available The effects of different dietary lipids on the fatty acid profiles of eggs produced by 20 and 54 wk old Dekalb laying hens were investigated. Laying hens were subjected to three defined treatments according to the source of lipid added to their diets: soybean oil, beef tallow, and a control diet (without the addition of oil. The experimental design was in a 3x2 factorial arrangement (three treatments and two different ages. The fatty acid composition of the yolks in the eggs produced by the laying hens was analyzed. The eggs produced by laying hens on the soybean oil diet had a large amount of polyunsaturated fatty acids (PUFA omega-6 (n-6 and omega-3 (n-3 in their yolks (23.55, 2.30% respectively, whereas egg yolks from hens who were given beef tallow had higher percentages of monounsaturated fatty acids (47.53% compared to soybean oil (47.53% and the control diet (38.72%. The percentages of trans fats present in the egg yolks in all treatments were considered very low (0.91; 0,11; 0.05%. Young layers are more efficient at depositing n-3 fatty acids (1.40%, specially C22:6 (0.76% with the best ratio n6:n-3 (13.97 compared to old layers (1.35; 0.72; 14.81% respectively. Based on these results, it was concluded that the amount of fatty acids present in the egg yolks can be modified by the sources of lipids included in the diet and that independent of the sources of lipid in the diet and the age of the chicken, egg yolks have insignificant amounts of trans fatty acids.Foram avaliados os efeitos de diferentes dietas lipídicas na composição de ácidos graxos (AG de ovos produzidos por poedeiras Dekalb de 20 e 54 semanas de idade. As poedeiras foram submetidas a três tratamentos definidos de acordo com a fonte lipídica adicionada nas rações: óleo de soja, sebo bovino e ração controle (sem adição de óleo. O delineamento experimental foi inteiramente casualizado em arranjo fatorial 3x2 (três tratamentos e duas idades das galinhas. Foram analisadas as composições em ácidos graxos das gemas dos ovos produzidos pelas poedeiras. O perfil de ácidos graxos das gemas dos ovos, produzidos pelas aves alimentadas com rações contendo óleo de soja, apresentaram na sua composição grande quantidade de ácidos graxos poliinsaturados (PUFA ômega 6 (n-6 and Omega 3 (n-3 (23,55; 2,30% respectivamente, enquanto as gemas dos ovos de poedeiras que receberam sebo bovino apresentaram maiores porcentagens de AG monoinsaturados (47,53% na sua composição, comparados com dieta contendo óleo de soja (47,53% e dieta controle (38,72%. As porcentagens de gordura trans presente nas gemas dos ovos de todos os tratamentos foram consideradas muito baixas (0,91; 0,11; 0,05%. Poedeiras novas são mais eficientes em depositar AG n-3 (1,40%, especialmente C22:6 (0,76% na gema do ovo, com melhor razão n6:n:3 (13,97 comparado com poedeiras velhas (1,35; 0,72; 14,81% respectivamente. Com base nesses resultados, foi concluído que a quantidade de ácidos graxos presentes na gema dos ovos podem ser modificadas de acordo com as fontes de lipídios oferecidas nas dietas e que, independente da adição de diferentes fontes lipídicas na ração e da idade das galinhas, as gemas dos ovos possuem quantidades insignificantes de gorduras trans.

  4. Modelagem e simulação de reator trifasico aplicado a oleos pesados com reações de hidrocraqueamento termico e catalitico, desmetalização e deposição de coque na mistura e no catalisador

    OpenAIRE

    Letivan Gonçalves de Mendonça Filho

    1998-01-01

    Resumo: Esta dissertação apresenta a modelagem e simulação de um reator tipo ?slurry bubble column? que opera em leito fluidizado trifásico (gás-liquido-solido) com arraste de sólidos para promover a hidroconversão de resíduos de vácuo em condições severas de temperatura e pressão. Nosso objetivo foi reproduzir os fenômenos responsáveis pelas paradas típicas de reatores de hidroconversão de leito fluidizado trifásico, que são separação de fases devido a precipitação ds asfaltenos, a deposição...

  5. Estimation of potentially contaminated sediment volume in cases of oil spill in a summer conditions to sandy beaches of Rio Grande do Sul, Brazil; Estimativa do volume sedimentar potencialmente contaminado em casos de derrame de oleo em condicoes de verao para praias arenosas do Rio Grande do Sul

    Energy Technology Data Exchange (ETDEWEB)

    Costi, Juliana; Calliari, Lauro J. [Fundacao Universidade Federal do Rio Grande (FURG), RS (Brazil)

    2008-07-01

    Field experiments relating oil of two different densities with sediment penetration along ocean beaches with distinct morphodynamic behavior along the RS coastline indicates that, for both types of oil, higher penetration is associated to beaches which display higher mean grain size. Based on penetration depth it is possible to estimate the volume of contaminated sediments due to oil spills that eventually can reach the coast. Sediment cores sampled at 80 days interval at two different places characterized by a dissipative and a intermediate beaches indicate a higher variation of the sediment parameters and volume associated to the intermediate beach. (author)

  6. Assessing scenarios of the brazilian energy matrix in the long-term plan of Ministry of Mines and Energy: impacts in the oil and gas industry; Avaliacao de cenarios de matriz energetica nacional no plano de longo prazo do Ministerio de Minas e Energia: impactos na industria de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Giovani; Szklo, Alexandre; Schaeffer, Roberto [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 Law no. 9,478/97 establishes that among its attributions the Energy Policy National Council (CNPE) must review periodically the national energy matrix. This paper aims at discussing the scenarios considered in the current revision based on an integrated energy planning approach, identifying its key points and analyzing its eventual consequences, particularly for oil and gas industry. More precisely, it evaluates the effects over the O and G industry of changes in the international and national circumstances. The international key factors focused are, mainly, oil and oil product prices and productive and technological strategies of O and G companies. The national key factors discussed fuel prices, inter-fuel substitution potentials, efficiency levels, potentials of new discovers and characteristics of Brazilian reserves of oil and natural gas (on-shore or off-shore E and P, oil or gas fields, API degree density, sulfur and acid contents), and adequate energy infra-structure (necessity of distribution and transportation grid expansion, refining capacity etc.). Such discussions have important implications for public policies and corporate strategies. (author)

  7. Evaluation of the level of maturity in project management in a department of a company in the oil and gas sector; Avaliacao do nivel de maturidade em gerenciamento de projetos em um departamento de uma empresa do setor de oleo e gas

    Energy Technology Data Exchange (ETDEWEB)

    Tavares, Marina Elisabete Espinho [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2012-07-01

    This work aims to analyse the results from methodology MMGP-Prado Setorial (2008) applied in a planning and control department from oil and gas segment, and suggest actions to increase its maturity level. (author)

  8. The environmental public policy context in the prevention and control aspects of oil incidents for the exploration and production phases in Brazil; O contexto das politicas publicas ambientais nos aspectos de prevencao e controle dos incidentes com oleo durante as etapas de exploracao e producao de petroleo no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Seifert Junior, Carlos Alberto; Walter, Tatiana; Nicolodi, Joao Luis [Universidade Federal do Rio Grande (FURG), RS (Brazil)

    2012-07-01

    It is not possible to state that Brazil is unprepared to respond oil incidents emergencies, in Coastal Zone, Continental Shelf and EEZ oil E and P, without an analysis with clear premises. First, we need to understand the context that lays this question, which it is not limited in the National Contingency Plan, as lately evidenced in media. Thus, we note that Brazil has a complex political and legal arrangements targeted to oil incidents prevention and control. In this context, comes this paper, in order to reveal this curtain, listing actors, legislation and other aspects that underlie the public policy governance in reference. (author)

  9. The environmental sustainability of a pilot plant for the manufacture of biodiesel from frying oil: a case study: Universidade de Brasilia UNB/FGA, Gama, DF, Brazil; A sustentabilidade ambiental de uma planta piloto para fabricacao de biodiesel a partir de oleo de fritura: estudo de caso: Universidade de Brasilia UnB/FGA, Gama, DF, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Glecia Virgolino da; Falla, Pilar Hidalgo; Ginoris, Yovanka Perez; Oliveira, Alessandro Borges de S.; Alves, Marcos Antonio de S. [Universidade de Brasilia (FGA/UnB), Gama, DF (Brazil)

    2010-07-01

    Whereas the efforts of the Brazilian government and its researchers to explore new renewable energy alternatives such as biofuels, and considering the existing methodologies for the production of biodiesel, including the processes of washing out, which consumes a large amount of water treated, University of Brasilia/FGA/Gama installs in about July 2010 a pilot plant for biodiesel production. The pilot plant will use feedstock used frying oil collected in homes, restaurants and coffee shop in the region, preventing this oil remains released to sewage in natura. Thus, this project aims to develop academic research and the improvement of the community in the city of Gama / DF. This study aimed to carry out preliminary studies of the methodology and water to be used in biodiesel production in order to confirm the reduction of fuel costs the University to contribute to reducing the release of oils into the sewer and use of distillers for water will wash the biodiesel, reducing the energy consumption of the plant. (author)

  10. Stability evaluation and chemical characterization of different vegetable oils viewing the search for candidates for certified reference materials for bio diesel; Avaliacao da estabilidade e caracterizacao quimica de diferentes oleos vegetais visando a busca de candidatos a materiais de referencia certificado (MRC) para biodiesel

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Georgiana F. da; Fonseca, Mauricio G.; Goncalves, Lenise V.F.; Silva, Regina Celia F. da; Silva, Fernanda M.R. da; Rodrigues, Janaina M. [Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial (LABOR/INMETRO), Duque de Caxias, RJ (Brazil). Lab. de Analises Organicas; Leal, Rodrigo V.P. [Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial (LAMBOC/INMETRO), Duque de Caxias, RJ (Brazil). Lab. de Motores, Combustiveis e Lubrificantes], Email: rvleal@inmetro.gov.br; Cunha, Valnei S. [Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial (DIMCI/INMETRO), Duque de Caxias, RJ (Brazil). Diretoria de Metrologia Cientifica e Industrial

    2009-07-01

    Viewing the characterization of the various vegetable oils aiming to obtain a data bank that allows the production of certified reference materials for bio diesel of different blends, a study of chemical-physical characterization of different oils and derivative of bio diesel.

  11. Potential of Metarrhizium anisopliae and Beauveria bassiana isolates and Neem oil to control the aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae); Potencial de isolados de Metarhizium anisopliae e Beauveria bassiana e do oleo de Nim no controle do pulgao Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)

    Energy Technology Data Exchange (ETDEWEB)

    Araujo Junior, Jose M. de; Marques, Edmilson J.; Oliveira, Jose V. de [Universidade Federal Rural de Pernambuco (UFRPE), Recife, PE (Brazil). Dept. de Agronomia - Entomologia], e-mail: jma_junior@yahoo.com.br, e-mail: emar@depa.ufrpe.br, e-mail: vargasoliveira@uol.com.br

    2009-07-15

    This work aimed to determine the efficiency of the entomopathogenic fungi Metarrhizium anisopliae and Beauveria bassiana to control the aphid Lipaphis erysimi (Kalt.) (Hemiptera:Aphididae) in kale Brassica oleracea var acephala D.C., as well as their compatibility with a neem oil formulation (Neemseto{sup R}). Ten isolates of both fungi were tested and the most pathogenic ones were B. bassiana CG001 and M. anisopliae CG30 with 90% and 4.4 days, and 64% and 3.8 days of mortality and median lethal time, respectively. Bioassays with neem at concentrations of 0.5, 1.0 and 2.0% were done either by leaf discs dipping or spraying the aphids on the leaf discs. The neem spraying treatment at 2.0% provided 90% mortality. The use of B. bassiana isolate CG001 or M. anisopliae isolate CG30 with neem at 0.125, 0.25, and 0.5%, demonstrated that these isolates could have their spore viability or colony growth affected when exposed to neem concentrations higher than 0.25%. In absolute values, the isolates B. bassiana CG001 and M. anisopliae CG30 are the most virulent to L. erysimi, and could be utilized in the management of this pest. (author)

  12. Transcriptome and metabolome analysis of Ferula gummosa Boiss. to reveal major biosynthetic pathways of galbanum compounds.

    Science.gov (United States)

    Sobhani Najafabadi, Ahmad; Naghavi, Mohammad Reza; Farahmand, Hamid; Abbasi, Alireza

    2017-11-01

    Ferula gummosa Boiss. is an industrial and pharmaceutical plant that has been highly recognized for its valuable oleo-gum-resin, namely galbanum. Despite the fabulous value of galbanum, very little information on the genetic and biochemical mechanisms of its production existed. In the present study, the oleo-gum-resin and four organs (root, flower, stem, and leaf) of F. gummosa were assessed in terms of metabolic compositions and the expression of genes involved in their biosynthetic pathways. Results showed that the most accumulation of resin and essential oils were occurred in the roots (13.99 mg/g) and flowers (6.01 mg/g), respectively. While the most dominant compound of the resin was β-amyrin from triterpenes, the most abundant compounds of the essential oils were α-pinene and β-pinene from monoterpenes and α-eudesmol and germacrene-D from sesquiterpenes. Transcriptome analysis was performed by RNA sequencing (RNA-seq) for the plant roots and flowers. Differential gene expression analysis showed that 1172 unigenes were differential between two organs that 934 (79.6%) of them were up-regulated in the flowers and 238 (20.4%) unigenes were up-regulated in the roots (FDR ≤0.001). The most important up-regulated unigenes in the roots were involved in the biosynthesis of the major components of galbanum, including myrcene, germacrene-D, α-terpineol, and β-amyrin. The results obtained by RNA-Seq were confirmed by qPCR. These analyses showed that different organs of F. gummosa are involved in the production of oleo-gum-resin, but the roots are more active than other organs in terms of the biosynthesis of triterpenes and some mono- and sesquiterpenes. This study provides rich molecular and biochemical resources for further studies on molecular genetics and functional genomics of oleo-gum-resin production in F. gummosa.

  13. Antimicrobial activity of four medicinal plants widely used in Persian folk medicine

    Directory of Open Access Journals (Sweden)

    A. Hamedi

    2015-12-01

    Full Text Available Background and objectives: Commiphora habessinica (O.Berg Engl. (Burseraceae, Boswellia sacra Flueck (Burseraceae, Phoenix dactylifera L. (Arecaceae, and Doronicum glaciale (Wulfen Nyman (Asteraceae are of ethnomedicinal importance in Persian folk medicine and are widely used to treat infectious diseases. The aim of the present study was to investigate the antimicrobial properties of these herbal medicines to prevent misadministration. Methods: Antifungal and antibacterial (Gram-positive and Gram-negative activities of the petroleum ether, dichloromethane and ethanol fractions obtained from oleo-gum-resin of C. habessinica and B. sacra, spathe of P. dactylifera and roots of D. glaciale were evaluated against standard species and clinical antibiotic resistant isolates using broth microdilution method. The fractions were tested at concentrations of 0.5 to 256 µg/mL.Results: The petroleum ether fraction of C. habessinica oleo-gum-resin exhibited the most anti-Candida activity with MIC50 of 0.5-16 µg/mL. The growth of C. glabrata and C. tropicalis was inhibited by the ethanol fraction of C. habessinica oleo-gum-resin with MIC50 of 1-16 μg/mL. C. glabrata was the most susceptible species. Among the tested fractions, only the petroleum ether fraction of C. habessinica oleo-gum-resin had an inhibitory effect on Aspergillus spp. with a MIC50 of 8-32 µg/mL. None of the fractions exhibited antimicrobial activity against the Gram-positive and Gram-negative bacteria at concentrations of 0.5 to 256 µg/mL. Conclusions: The sensitivity of fungi and bacteria to natural antimicrobials varies widely within species and it is essential to consider the sensitivity of the strains to prevent resistance.

  14. Phytochemistry and potential therapeutic actions of Boswellic acids: A mini-review

    Directory of Open Access Journals (Sweden)

    Farah Iram

    2017-06-01

    Full Text Available The pentacyclic triterpenic acids isolated from the oleo gum resin of various Boswellia species are collectively called as Boswellic acids (BA. The oleo gum resin obtained from Indian variety i.e. Boswellia serrata (Family – Burseraceae is commonly known as Salai guggal. The resin fraction of Salai guggal is rich in Boswellic acids and its essential oil is composed of a mixture of mono, di and sesquiterpenes while gum fraction chiefly contains pentose and hexose sugars. This oleo-gum resin is quite popular among traditional practitioners of traditional Chinese and Indian Systems of medicine owing to their wide range of useful biological properties such as anti-inflammatory, anti-arthritic, anti-rheumatic, anti-diarrheal, anti-hyperlipidemic, anti-asthmatic, anti-cancer, anti-microbial anti-fungal, anti-complementary and analgesic activity, etc. It has been used as a herbal medicine since the prehistoric time to cure acute and chronic ailments including inflammatory diseases. Phytochemical investigation of this herbal medicine lead to identification of Boswellic acids which are found to be novel, potent, specific anti-inflammatory agents due to non-redox inhibition of 5-lipoxygenase (5-LO enzyme. However, the other important targets of Boswellic acids also include topoisomerases, angiogenesis, and cytochrome p450 enzymes. This review is a sincere attempt to discuss and present the current status of therapeutic potential, phytochemical as well as pharmacological profile of Boswellic acids primarily obtained from B. serrata.

  15. Obtención y evaluación de plantas de olivo tolerantes a la salinidad mediante empleo de métodos biotecnológicos

    OpenAIRE

    Troncoso Mendoza, Javier

    2008-01-01

    Tesis descargada desde CSIC El olivo ha estado y está presente en la evolución de la cultura mediterránea. Junto con la palmera datilera, la higuera y la vid, forma parte de los árboles de fruto más característicos y antiguos del Mediterráneo. Pero a diferencia de aquellos, que fundamentalmente proporcionan alimento, el olivo además regala al hombre medicamentos, ungüentos, perfumes, lubrificantes, condimentos, luz, calor, madera y alimento para el ganado. Si a esto, se une su gra...

  16. Mechanical design and fabrication of a heat exchanger. Report of the design and construction of a heat exchanger which will be used in 'Experimental analysis of heat transfer in the boiling in forced convection; Diseno mecanico y fabricacion de un intercambiador de calor. Reporte del diseno y construccion de un intercambiador de calor que sera usado en 'Analisis experimental de transferencia de calor en la ebullicion en conveccion forzada

    Energy Technology Data Exchange (ETDEWEB)

    Mariano H, E

    1991-08-15

    To continue with the equipment of the thermal hydraulics laboratory, it was designed thermal and mechanically an heat exchanger, to satisfy the requirements to have circuit that allows to carry out heat transfer experiments. The heat exchanger was manufactured and proven in the workshops of the Prototypes and Models Management, and it is expected that to obtain the foreseen results once completely installed the circuit, in the laboratory of thermal hydraulics of the Management of Nuclear Systems. (Author)

  17. Mechanical design and fabrication of a heat exchanger. Report of the design and construction of a heat exchanger which will be used in 'Experimental analysis of heat transfer in the boiling in forced convection; Diseno mecanico y fabricacion de un intercambiador de calor. Reporte del diseno y construccion de un intercambiador de calor que sera usado en 'Analisis experimental de transferencia de calor en la ebullicion en conveccion forzada

    Energy Technology Data Exchange (ETDEWEB)

    Mariano H, E

    1991-08-15

    To continue with the equipment of the thermal hydraulics laboratory, it was designed thermal and mechanically an heat exchanger, to satisfy the requirements to have circuit that allows to carry out heat transfer experiments. The heat exchanger was manufactured and proven in the workshops of the Prototypes and Models Management, and it is expected that to obtain the foreseen results once completely installed the circuit, in the laboratory of thermal hydraulics of the Management of Nuclear Systems. (Author)

  18. 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)

  19. Biodiesel production in methyl esterification in the frying oil using catalyst Ni{sub 0,5}Zn{sub 0,5}Fe{sub 2}O{sub 4} to produce biodiesel; Producao de biodiesel por esterificacao metalica utilizando o ferroespinelio Ni{sub 0,5}Zn{sub 0,5}Fe{sub 2}O{sub 4} como catalisador e oleo de fritura como materia prima

    Energy Technology Data Exchange (ETDEWEB)

    Vasconcelos, E.V.; Dantas, J.; Pereira, K.B.O.; Barros, A.B.; Moura, T.F.B.; Costa, A.C.F.M., E-mail: erikvilar12@gmail.com [Universidade Federal de campina Grande, PB (Brazil)

    2016-07-01

    The use of magnetic catalysts for biodiesel production has gaining prominence because of possibility about its recovery and its reuse, as well as, the reuse of materials that would be discarded in the environment. Thus, we propose to evaluate the efficiency of the catalyst Ni{sub 0,5}Zn{sub 0,5}Fe{sub 2}O{sub 4} in methyl esterification in the frying oil to produce biodiesel. The catalyst was produced by combustion reaction using containers with different production capacity and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and infrared spectrometry with Fourier transform (FTIR). The catalytic tests were conducted in a stainless steel reactor at 180°C/1h, 2% of catalyst, oil/ethanol ratio of 1:12. Regardless of the container production capacity it was verified the catalyst obtaining with the major phase formation of the inverse spinel and traces of segregated phases with an average crystallite size of 42.13, 32.07 and 36.93 nm. All catalysts showed satisfactory results with conversions of 74%, 77% and 71%. (author)

  20. Development of a geographical data base and its utilization in elaboration of maps of environmental sensitivity to the oil spill in the coastal area between Galinhos and Sao Bento do Norte, RN (Brazil); Desenvolvimento de um banco de dados geograficos e sua utilizacao na elaboracao de mapas de sensibilidade ambiental ao derramamento de oleo na area costeira entre Galinhos e Sao Bento do Norte - RN

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Angelica Felix de; Amaro, Venerando Eustaquio; Vital, Helenice; Aloise, Dario Jose [Rio Grande do Norte Univ., Natal, RN (Brazil). Programa de Recursos Humanos da ANP para o Setor Petroleo e Gas, PRH-22. Formacao em Geologia, Geofisica e Informatica

    2003-07-01

    The coastal areas located in the northern coast of the Rio Grande do Norte State, specifically between the districts of Galinhos e Sao Bento do Norte, characterized by constant processes of coastal and eolic transport, causing erosion, alterations in the sediments and modifications in the coast line. Beyond of those natural factors, there is the proximity to Polo Petrolifero of Guamare, the largest terrestrial producer of petroleum of Brazil. The first part of that work consisted of to elaborate and to develop a Geographical Database (BDG), to store all the existent data of the study area, such as geological and geophysical data, hydrodynamic data, products of remote sensing, thematic maps, among others. The second stage of this work aimed to develop starting from the data previously stored in BDG, Oil-Spill Environmental Sensitivity Maps (Maps SAO). Those maps evaluate the reaction of the certain place if to happen an oil spill in her, supplying necessary information to the decision in cleaning and removal of the spilled oil. In that way, Maps SAO of the study area were elaborated in different teams to evaluate if there would be change of the behavior of the coast in the presence of the oil. (author)

  1. Desenvolvimento de fluidos aquosos com bentonita para perfuração de poços de petróleo onshore Development of aqueous fluids with bentonite clay for drilling of onshore oil wells

    Directory of Open Access Journals (Sweden)

    R. C. A. M Nascimento

    2010-06-01

    Full Text Available Devido aos grandes desafios encontrados na perfuração de poços, há a necessidade de se desenvolver fluidos com propriedades adequadas e capazes de atender todas as exigências da perfuração, como elevada capacidade de carreamento de sólidos e alta lubricidade, como também fluidos ambientalmente corretos. O grau de impacto dos fluidos de perfuração no meio ambiente depende especialmente do tipo de fluido utilizado, se de base aquosa, oleosa, sintética ou mesmo de base ar. Portanto, é de fundamental importância o desenvolvimento de fluidos com características específicas em cada etapa da perfuração. Sendo assim, este trabalho objetivou o desenvolvimento de fluidos aquosos, com baixo teor de sólidos e propriedades reológicas, de filtração e lubricidade adequadas à perfuração de poços de petróleo onshore. Os fluidos foram formulados utilizando em sua composição bentonita sódica industrializada, aditivos poliméricos e lubrificantes, em diferentes concentrações. O estudo reológico, de filtração e lubricidade mostrou que os fluidos apresentam comportamento pseudoplástico e que os aditivos selecionados desempenham com êxito suas funções de modificadores reológicos, redutores de filtrado e agente lubrificante. Além disto, ficou evidenciada a necessidade de aditivos lubrificantes em fluidos aquosos contendo argila bentonítica e polímeros. A adição de 1% de lubrificante no fluido é suficiente para adequar a capacidade lubrificante dos fluidos.Due to challenges encountered in drilling wells, there is a need to develop fluids that have properties suitable and able to meet all the requirements of drilling, such as, high capacity for carrying of solid and high lubricity. Besides that, they need to be environmentally friend. The degree of impact of drilling fluids in the environment depends on the type of fluid used, if water or oil or synthetic or air based. It is therefore of fundamental importance to develop

  2. Synthesis of oleyl oleate wax esters in Arabidopsis thaliana and Camelina sativa seed oil.

    Science.gov (United States)

    Iven, Tim; Hornung, Ellen; Heilmann, Mareike; Feussner, Ivo

    2016-01-01

    Seed oil composed of wax esters with long-chain monoenoic acyl moieties represents a high-value commodity for industry. Such plant-derived sperm oil-like liquid wax esters are biodegradable and can have excellent properties for lubrication. In addition, wax ester oil may represent a superior substrate for biodiesel production. In this study, we demonstrate that the low-input oil seed crop Camelina sativa can serve as a biotechnological platform for environmentally benign wax ester production. Two biosynthetic steps catalysed by a fatty alcohol-forming acyl-CoA reductase (FAR) and a wax ester synthase (WS) are sufficient to achieve wax ester accumulation from acyl-CoA substrates. To produce plant-derived sperm oil-like liquid wax esters, the WS from Mus musculus (MmWS) or Simmondsia chinensis (ScWS) were expressed in combination with the FAR from Mus musculus (MmFAR1) or Marinobacter aquaeolei (MaFAR) in seeds of Arabidopsis thaliana and Camelina sativa. The three analysed enzyme combinations Oleo3:mCherry:MmFAR1∆c/Oleo3:EYFP:MmWS, Oleo3:mCherry:MmFAR1∆c/ScWS and MaFAR/ScWS showed differences in the wax ester molecular species profiles and overall biosynthetic performance. By expressing MaFAR/ScWS in Arabidopsis or Camelina up to 59% or 21% of the seed oil TAGs were replaced by wax esters, respectively. This combination also yielded wax ester molecular species with highest content of monounsaturated acyl moieties. Expression of the enzyme combinations in the Arabidopsis fae1 fad2 mutant background high in oleic acid resulted in wax ester accumulation enriched in oleyl oleate (18:1/18:1 > 60%), suggesting that similar values may be obtained with a Camelina high oleic acid line. © 2015 Society for Experimental Biology, Association of Applied Biologists and John Wiley & Sons Ltd.

  3. Use of shock block transmitters in the structural rehabilitation of historical buildings in Calabria and Sicily

    International Nuclear Information System (INIS)

    Bianco, Alessia; Candela, Michele; Fonti, Roberta

    2008-01-01

    Many old and historical masonry buildings, located in the Calabrian and Sicilian areas near the strait of Messina, are affected by typical pattern of cracks, which are not produced by previous earthquakes. These cracks in the masonry walls are characterized by a quasi-vertical trend with constant width. The careful examination of the crack distribution allows to clearly identify the diagnosis: the damage is caused by the sinking due to a horizontal movement of translation of the ground, which is an evident effect of creep phenomena in the soil, so-called 'solifluxion'. This paper, after showing this geological pathology, proposes an innovative strategy of intervention, which consists of the use of 'oleo-dynamic' devices, so-called shock block transmitters, providing different degrees of restraint, according to the loading conditions. In addition, in case of earthquake, an important part of the in-put seismic energy can be dissipated. The strategy of application of this system to the building consists of the subdivision of each masonry wall in two different parts, which are physically separated by the cracks. Each wall portion must be consolidated separately and the different parts of walls behave as statically independent each other, so that they can move independently during the serviceability conditions. The connection among the walls composing the whole structural organism is given by metal tie-rods equipped with 'oleo dynamic' devices, which allows, in a given range, the horizontal sliding in case of slow movement due to the phenomenon of 'solifluxion'. Contrary, in case of dynamic and fast movements, such as the ones produced by an earthquake, each 'oleo dynamic' device provides a fully restraint effect and, as a consequence, the tie-rods behave in the classical way

  4. Antimicrobial effects of Ferula gummosa Boiss gum against extended-spectrum β-lactamase producing Acinetobacter clinical isolates.

    Science.gov (United States)

    Afshar, Fatemeh Farid; Saffarian, Parvaneh; Hosseini, Hamideh Mahmoodzadeh; Sattarian, Fereshteh; Amin, Mohsen; Fooladi, Abbas Ali Imani

    2016-08-01

    Acinetobacter spp. are important causes of nosocomial infections. They possess various antibiotic resistance mechanisms including extended spectrum beta lactamases (ESBLs). The aim of this study was to determine antibiotic resistance profile of Acinetobacter clinical isolates especially among ESBL-producing strains and to investigate the antimicrobial effects of oleo-gum-resin extract and essential oil of Ferula gummosa Boiss. 120 Acinetobacter strains were isolated from various clinical samples of hospitalized patients in Baqiyatallah hospital, Tehran during 2011-2012. Antibiotic susceptibility test was performed on the isolates using disk diffusion method. To detect and confirm the ESBL-positive isolates, phenotypic and genotypic tests were performed. Three types of F. gummosa oleo-gum-resin extracts and essential oils were prepared and the bioactive components of F. gummosa Boiss extracts were determined by GC-Mass chromatography. F. gummosa antimicrobial activity was evaluated against standard strain of Acinetobacter baumannii (ATCC19606) as well as Acinetobacter clinical isolates using well and disk diffusion methods. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined by broth microdilution method. 46 isolates were resistant to all tested antibiotics. All clinical isolates were resistant to cefotaxime. 12.94% of the isolates were phenotypically ESBL-producing among which 94.2% carried ESBL genes ( bla PER-1 , bla OXA-4 and bla CTX-M ) detected by PCR. Oleo-gum-resin of F. gummosa had significant antibacterial activity and alcoholic essential oil had higher inhibitory effect on Acinetobacter strains (MIC of 18.75 mg/ml). Ferula gummosa extract contained components with well-known antimicrobial effects.

  5. O duplo enfoque contábil e administrativo no sistema de custos da indústria de óleos vegetais

    OpenAIRE

    Teodoro Clebsch

    1982-01-01

    Visa a presente dissertação de mestrado estabelecer um sistema de contabilidade de custos integrado e coordenado com a contabilidade financeira para a Industria de Oleos Vegetais e que, encarando este sistema sob um duplo enfoque, contabil e administrativo, permita a conciliação destes dois enfoques ate certo ponto contrastantes. A construção de um sistema de custo requer um completo entendimento: (1) dos processos de produção; (2) dos objetivos perseguidos pelo sistema de custos e (3) da est...

  6. Avaliação de óleos essenciais de plantas aromáticas com atividade inseticida em Triatoma infestans (Klug, 1834 (Hemiptera: Reduviidae = Evaluation of essential oils with insecticidal activity in Triatoma infestans (Klug, 1834 (Hemiptera: Reduviidae

    Directory of Open Access Journals (Sweden)

    Suellem Petilim Gomes

    2011-07-01

    Full Text Available A doenca de Chagas e um dos maiores problemas de saude publica na America Latina. Neste trabalho, foi avaliada a acao inseticida de oleos essenciais de Anacardium humile Cymbopogon nardus, Ocimum basilicum e Eucalyptus urograndis em ninfas do 3‹ e 4‹ estadios dedesenvolvimento de Triatoma infestans por acao topica e pressao a vapor (fumigacao. Para o teste topico foram realizadas duas repeticoes cada uma com cinco ninfas de 3‹ e 4‹ estadios de desenvolvimento de T. infestans. Foi aplicado 1ƒÊL de cada concentracao na regiao dorsal de cada individuo. Para o teste de fumigacao foram utilizados potes de 2 L com tampa vedante. Os oleos essenciais de O. gratissimum e E. urograndis apresentaram atividadeinseticida para T. infestans, e A. humile e C. nardus apresentaram em media 5 e 15% de mortalidade, respectivamente. Para fumigacao, somente o oleo de E. urograndis teve efeito, com 100% de mortalidade sobre T. infestans , sendo que para os outros oleos nao foiobservado efeito de fumigacao. Esse trabalho relata pela primeira vez a acao inseticida de E. urograndis em potes fumigenos para o controle de triatomineos. Os resultados sao importantes devido a busca por novos modelos moleculares com acao inseticida em triatomineos resistentes aos inseticidas sinteticos.Chagas disease is a major public health problem in Latin America. This work aimed to evaluate the insecticide action of essential oils of Anacardium humile, Cymbopogon nardus, Ocimum basilicum and Eucalyptus urograndis on Triatoma infestans nymphs of third and fourth stages of development by topic action and steam pressure (fumigation. Two repetitions were performed at the topic test with five nymphs of third and fourth stages of development of T. infestans. It was applied 1ƒÊL of each concentration on the dorsal region of each nymph. Two-liter pots with sealing covers were used at the fumigation test. The essential oils of O. gratissimum and E. urograndis showed insecticidal

  7. CLEO-c and CESR-c: A new frontier in strong and weak interactions

    Energy Technology Data Exchange (ETDEWEB)

    Richichi, Stephen J

    2003-06-01

    We report on the physics potential of a charm and QCD factory, based on a proposal for the conversion of the existing CESR machine and CLEO detector: ''CESR-c and OLEO-c''. Such a facility will make major contributions to the field of quark flavor physics in this decade. It may also provide the best chance for understanding non-perturbative QCD, which is essential to understanding the strongly-coupled sectors of the new physics that lies beyond the Standard Model.

  8. CLEO-c and CESR-c: A new frontier in strong and weak interactions

    Science.gov (United States)

    Richichi, Stephen J.

    2003-06-01

    We report on the physics potential of a charm and QCD factory, based on a proposal for the conversion of the existing CESR machine and CLEO detector: "CESR-c and OLEO-c". Such a facility will make major contributions to the field of quark flavor physics in this decade. It may also provide the best chance for understanding non-perturbative QCD, which is essential to understanding the strongly-coupled sectors of the new physics that lies beyond the Standard Model.

  9. CLEO-c and CESR-c: A new frontier in strong and weak interactions

    International Nuclear Information System (INIS)

    Richichi, Stephen J.

    2003-01-01

    We report on the physics potential of a charm and QCD factory, based on a proposal for the conversion of the existing CESR machine and CLEO detector: ''CESR-c and OLEO-c''. Such a facility will make major contributions to the field of quark flavor physics in this decade. It may also provide the best chance for understanding non-perturbative QCD, which is essential to understanding the strongly-coupled sectors of the new physics that lies beyond the Standard Model

  10. La contaminación Química

    OpenAIRE

    Jimbo G., Marcelo

    2003-01-01

    La contaminación química de la leche se puede verificar mediante cuatro vías: a. Detergentes y desinfectantes usados en las operaciones de lavado. b.Antielmínticos. c. Insecticidas y anticriptogámicos usados en agricultura. d. Elementos radioactivos, sustancias dicersas, metales.

  11. Desenvolvimento de insertos sinterizados autolubrificantes para uso em matrizes de conformação a frio

    OpenAIRE

    Marcelo Salvador Cóser

    2016-01-01

    Este trabalho avalia o uso de insertos autolubrificantes de pó de aço ferramenta sinterizado para aplicação em ferramentas dos processos de Conformação a Frio. São apresentadas a preparação e a análise de diferentes composições de misturas de pós de aço ferramenta H 13. A Metalurgia do Pó convencional foi utilizada como processo para a obtenção dos insertos do estudo. Foram compactadas e sinterizadas misturas de pó de aço H13 com a adição de percentuais variados do lubrificante sólido Bissulf...

  12. Pharmacological properties of guggulsterones, the major active components of gum guggul.

    Science.gov (United States)

    Shah, Rohan; Gulati, Vandana; Palombo, Enzo A

    2012-11-01

    Oleo gum resin secreted by Commiphora mukul, also known as gum guggul, has been used widely as an ayurvedic drug. Commiphora mukul is a short thorny shrub that is native to the Indian subcontinent. Oleo gum resin extracted by incision of the bark is a very complex mixture of gum, minerals, essential oils, terpenes, sterols, ferrulates, flavanones and sterones. Its active constituents, the Z- and E-guggulsterones, have been demonstrated to exhibit their biological activities by binding to nuclear receptors and modulating the expression of proteins involved in carcinogenic activities. Guggulsterones have also been reported to regulate gene expression by exhibiting control over other molecular targets including transcription factors such as nuclear factor (NF)-κB, signal transducer and activator of transcription (STAT) and steroid receptors. Considerable scientific evidence indicates the use of gum guggul as a therapeutic agent in the treatment of inflammation, nervous disorders, hyperlipidaemia and associated cardiac disorders such as hypertension and ischaemia, skin disorders, cancer and urinary disorders. This review highlights the taxonomic details, phytochemical properties and pharmacological profile of gum guggul. Copyright © 2012 John Wiley & Sons, Ltd.

  13. The effect of 60Co-gamma radio-sterilization on Boswellia carterii essential oil composition

    Directory of Open Access Journals (Sweden)

    P. Badr

    2016-10-01

    Full Text Available Background and objectives:Gamma-irradiation is used vastly for both decontamination and sterilization of natural products; but these high-energy rays can affect heat-sensitive essential oils. Methods: The oleo-gum-resin of Boswellia carterii (Burseraceae was sterilized by γ-irradiation at dose 30 KGy. The essential oils obtained by hydrodistillation of non-irradiated Boswellia (NIB and irradiated Boswellia (IB were analyzed by GC/MS and the changes were compared. The structure of octyl acetate as the major component and marker of B. carterii was confirmed by MS/MS. Results: Twenty-five compounds comprising 99.55% of NIB oil and nineteen compounds comprising 98.61% of IB oil were identified. Major constituents which were common for both oils were octyl acetate (52.67 % in NIB, 76.51 % in IB, 1-octanol (6.37 % in NIB, 5.19 % in IB, duva-4, 8, 13-triene-1,3α diol (5.52 % in NIB, 3.94 % in IB, verticiol (13.63 % in NIB and verticillane type diterpene (5.4 % in IB they made up 78.19% and 91.04% of NIB and IB, respectively. Conclusion: Gamma irradiation was an efficient method for sterilization of Boswellia carterii oleo-gum resin, but it resulted in change in the essential oil composition particularly octyl acetate changed from 52.67% to 76.51%.

  14. Análise do consumo de energia na produção de silagem de milho em plantio direto - DOI: 10.4025/actascianimsci.v25i2.1980 Energy consumption analysis of corn silage production in non-tillage crop system- DOI: 10.4025/actascianimsci.v25i2.1980

    Directory of Open Access Journals (Sweden)

    Aloísio Torres de Campos

    2003-04-01

    Full Text Available O agroecossistema, como um meio de converter a energia solar em produtos, necessita de várias fontes de energia, dentre as quais destacam-se a dos fertilizantes, a dos defensivos agrícolas e outras. No presente trabalho, realizou-se um estudo do consumo energético envolvido na produção de milho para silagem em sistema de plantio direto, na região de São Miguel do Iguaçu, Estado do Paraná. No consumo de energia direta, os combustíveis e lubrificantes foram os maiores consumidores, representando 45,90% do total, os defensivos agrícolas foram responsáveis pelo consumo de 24,12%, enquanto que os fertilizantes, por 10,53%. Ao computar os componentes de origem fóssil, os combustíveis, os lubrificantes, os defensivos e os fertilizantes, a participação do consumo total de energia foi de 84,07%.The agricultural ecosystem as a way of converting solar energy in products needs several energy sources, among those sources stood out fertilizers, agricultural defensives and others. These inputs are derived from fossils. In the present paper, the energy consumption involved in corn silage production in a non-tillage crop system, in São Miguel do Iguaçu, State of Paraná, Brazil, was studied. In the direct energy input, fuels and lubricants were the largest consumers, representing 45.90% of the total, agricultural defensives were responsible for the consumption of 24.12% of the total, while fertilizers for 10.53% of the total consumption. By computing the fossil origin components, fuels, lubricants, defensive and fertilizers, the participation of the total consumption of energy was of 84.07%.

  15. Influência da lubrificação do espéculo vaginal na interpretação da colpocitologia oncótica The effect of vaginal speculum lubrication on cervical cytology findings

    Directory of Open Access Journals (Sweden)

    Josie Bittencourt da Silva

    2005-06-01

    Full Text Available OBJETIVO: avaliar a interferência de dois lubrificantes vaginais (vaselina e silicone na interpretação da colpocitologia oncótica. MÉTODO: realizou-se estudo transversal, prospectivo, com 100 pacientes, entre agosto e outubro de 2003. As pacientes foram divididas em dois grupos de 50, de acordo com o tipo de lubrificante utilizado. Foram colhidas duas lâminas de cada paciente: a primeira após introdução de espéculo sem lubrificante e, em seguida, após troca por espéculo lubrificado com vaselina (Grupo V ou silicone (Grupo S. As lâminas foram analisadas e comparadas por dois citotécnicos e classificadas em laudo próprio da instituição. Testou-se a igualdade de variáveis da idade nos dois grupos, utilizando-se o teste de Levene, e posteriormente realizou-se o teste t com variâncias iguais. RESULTADOS: comparando entre si os 100 pares de lâminas, oito laudos foram discordantes. As causas de discordância não foram relacionadas diretamente ao lubrificante e não comprometeram o diagnóstico e classificação colpocitológica. Não houve diferença significante quanto ao número de laudos discordantes, seis no Grupo V e dois no Grupo S (p=0,269, entre as lâminas colhidas sem e com lubrificante. Não houve lâminas insatisfatórias na amostra. O número de lâminas classificadas como satisfatórias e satisfatórias mas limitadas foi semelhante quando colhidas com e sem lubrificante: no Grupo S: 46 satisfatórias e quatro limitadas (p=0,001 e kappa=0,802 e no Grupo V: 48 satisfatórias e duas limitadas (p=0,001 e kappa=0,953. Nenhum artefato foi encontrado em todas as 100 lâminas colhidas com espéculo lubrificado. CONCLUSÃO: os resultados obtidos demonstram que o uso do espéculo lubrificado com vaselina ou silicone não interfere nos resultados da colpocitologia oncótica.PURPOSE: to assess the interference of two vaginal lubricants (vaseline and silicone in the interpretation of cervical oncotic cytology. METHODS: a

  16. PULPOTOMIA CON HIDROXIDO DE CALCIO CON MATERIAL DE SELLAJE EN CAVIDADES CURADAS DESPUES DE 2 AÑOS

    OpenAIRE

    Gruythuysen, Rene J.M.; Weerheijm, Karín L.

    2014-01-01

    El hidróxido de calcio entre otros han sido usados por mucho tiempo en la odontología debido a sus propiedades antibacterianas y a su favorable biocompatibilidad cuando se compara con otros agentes antibacteriales. El hidróxido de calcio entre otros han sido usados por mucho tiempo en la odontología debido a sus propiedades antibacterianas y a su favorable biocompatibilidad cuando se compara con otros agentes antibacteriales.

  17. Evaluadores del Número

    Directory of Open Access Journals (Sweden)

    . .

    2013-07-01

    Full Text Available Corina Rodriguez – Centro Interdisciplinario para el Estudio de la Política Pública/CONICETEleonor Faur - Fondo de Población de Naciones UnidasIara María de Almeida Souza – Universidade Federal do Bahía, BrasilKatia Sento Sé Mello - Universidade Federal do Rio de Janeiro, BrasilLeonor Slavsky – Instituto Nacional de Antropología y Pensamiento LatinoamericanoLorena Rodríguez – Universidad de Buenos AiresRicardo Abduca – Universidad de Buenos AiresRicardo Melgar Bao – Instituto Nacional de Antropología e Historia, MéxicoRossana Guber – Instituto de Desarrollo Económico y SocialVictoria Ceres – Universidade Federal do Rio Grande do Sul, Brasil Ilustración de Tapa El pensamiento se hace forma, 2010, oleo sobre tela, 100 x 40cm. Silvana Merello, Artista Plástica

  18. Characterization and Identification of Natural Terpenic Resins employed in “Madonna con Bambino e Angeli” by Antonello da Messina using Gas Chromatography–Mass Spectrometry

    Directory of Open Access Journals (Sweden)

    Russo Mario

    2012-06-01

    Full Text Available Abstract Background Natural resins were frequently employed as adhesives or as components of oleo-resinous media in paintings in the past. The identification of vegetable resins is still an open problem. The aim of this paper is to analyze by GC-MS some vegetable resins frequently employed in paintings, such as Venice turpentine, dammar, copal, elemi in order to identify their main component in raw and aged samples. Some molecules are proposed as chemical “markers” to identify these natural resins. Results The results obtained on standards allowed us to successfully analyze sample collected from one work of art: the Madonna with the Infant and Angels by Antonello da Messina (XV century. Conclusion The results obtained confirm that the painting the artist originally used a mixture of linseed oil and natural resin (Venice turpentine as binding medium.

  19. Thermally stable, transparent, pressure-sensitive adhesives from epoxidized and dihydroxyl soybean oil.

    Science.gov (United States)

    Ahn, B Kollbe; Kraft, Stefan; Wang, D; Sun, X Susan

    2011-05-09

    Thermal stability and optical transparency are important factors for flexible electronics and heat-related applications of pressure-sensitive adhesives (PSAs). However, current acryl- and rubber-based PSAs cannot attain the required thermal stability, and silicon-based PSAs are much more expensive than the alternatives. Oleo-chemicals including functionalized plant oils have great potential to replace petrochemicals. In this study, novel biobased PSAs from soybean oils were developed with excellent thermal stability and transparency as well as peel strength comparable to current PSAs. In addition, the fast curing (drying) property of newly developed biobased PSAs is essential for industrial applications. The results show that soybean oil-based PSA films and tapes have great potential to replace petro-based PSAs for a broad range of applications including flexible electronics and medical devices because of their thermal stability, transparency, chemical resistance, and potential biodegradability from triglycerides.

  20. On the Numerical Accuracy of Spreadsheets

    Directory of Open Access Journals (Sweden)

    Alejandro C. Frery

    2010-10-01

    Full Text Available This paper discusses the numerical precision of five spreadsheets (Calc, Excel, Gnumeric, NeoOffice and Oleo running on two hardware platforms (i386 and amd64 and on three operating systems (Windows Vista, Ubuntu Intrepid and Mac OS Leopard. The methodology consists of checking the number of correct significant digits returned by each spreadsheet when computing the sample mean, standard deviation, first-order autocorrelation, F statistic in ANOVA tests, linear and nonlinear regression and distribution functions. A discussion about the algorithms for pseudorandom number generation provided by these platforms is also conducted. We conclude that there is no safe choice among the spreadsheets here assessed: they all fail in nonlinear regression and they are not suited for Monte Carlo experiments.

  1. De l’idée au marché : l’ITERG renforce ses activités dans la chimie verte avec la plateforme CEDOP, Centre européen de développement des oléo-produits

    Directory of Open Access Journals (Sweden)

    Alfos Carine

    2012-01-01

    Full Text Available ITERG, the Industrial Technical Centre (CTI for Fats and Oils, under the supervision of the Ministry of Economy, Finance and Employment, located in Pessac has undertaken the project to build a technology platform (to be operational in early 2012 dedicated to innovation and transfer in the field of oleochemicals from experimental to semi-industrial scales. This platform, CEDOP (European Centre for the Development of Oleo-Products can offer within the same entity, expertise and scalability from laboratory to semi-industrial productions, to industrial manufacturers, processors, distributors and value chain actors of oleo-products. This project unique in its design, perfectly in tune with public policies for innovation and development of green chemistry, not only meets the needs of manufacturers and their markets but also the current socio-economic expectations in terms of environment and sustainable development. The CEDOP project total investment reached 8,700,000 € [buildings (laboratories, industrial and pilot halls, technical offices and equipment]. After the positive results of preliminary studies (competition, market research, risk assessment and the inclusion of CEDOP in the “State-Aquitaine Region Contract of Projects”, public institutions (Regional Council, State, FEDER, local and professional organization (ONIDOL brought together 85% of the project funding. Such a support reflects the confidence of the stakeholders in ITERG’s independent entrepreneurial skills in scientific and technology to meet public and professional policies, but above all in the large scope of corporate customers from different sectors of activity, potential future users of the tool. This project for research and technology transfer is fully integrated in ITERG’s development and diversification strategies and aims to develop an attractive lipochemistry-technology cluster.

  2. Desempenho de diferentes lipases imobilizadas na síntese de biodiesel de óleo de palma = Performance of different immobilized lipases in palm oil biodiesel synthesis

    Directory of Open Access Journals (Sweden)

    Grazielle dos Santos Silva

    2011-04-01

    Full Text Available O presente trabalho teve como objetivo determinar as condicoes otimizadas da sintese enzimatica de biodiesel, a partir do oleo de palma e etanol, empregando diferentes lipases imobilizadas (lipase de Pseudomonas fluorescens imobilizada em SiO2-PVA e lipase de Candida antartica imobilizada em resina acrilica - Novozym„µ 435 em meio isento de solvente. Uma matriz de planejamento fatorial foi utilizada para avaliar a influencia da temperatura (42 ¡V 58„aC e a razao molar entre etanol e oleo de palma (6:1 ¡V 18:1 no rendimento detransesterificacao alcancado para cada preparacao de lipase. Os efeitos principais foram ajustados por analise de regressao multipla a modelos lineares e o rendimento maximo foi obtido quando o sistema operacional foi operado a 42„aC com substratos contendo etanol eoleo de palma na razao molar de 18:1. Os modelos matematicos que representam o rendimento global da reacao para cada lipase imobilizada foram considerados adequados para descrever os resultados experimentais.Optimized conditions for palm oil and ethanol enzymatic biodiesel synthesis were determined with different immobilized lipases SiO2-PVA-immobilized lipase from Pseudomonas fluorescens and acrylic resin-immobilized lipase, NovozymR435, from Candida antartica, in solvent-free medium. A full factorial design assessed the influence oftemperature (42 ¡V 58¢XC and ethanol: palm oil (6:1 ¡V 18:1 molar ratio on the transesterification yield. Main effects were adjusted by multiple regression analysis to linear models and the maximum transesterification yield was obtained at 42¢XC and 18:1 ethanol:palm oil molar ratio. Mathematical models featuring total yield for each immobilized lipase were suitable to describe the experimental results.

  3. Boswellia serrata, a potential antiinflammatory agent: an overview.

    Science.gov (United States)

    Siddiqui, M Z

    2011-05-01

    The resin of Boswellia species has been used as incense in religious and cultural ceremonies and in medicines since time immemorial. Boswellia serrata (Salai/Salai guggul), is a moderate to large sized branching tree of family Burseraceae (Genus Boswellia), grows in dry mountainous regions of India, Northern Africa and Middle East. Oleo gum-resin is tapped from the incision made on the trunk of the tree and is then stored in specially made bamboo basket for removal of oil content and getting the resin solidified. After processing, the gum-resin is then graded according to its flavour, colour, shape and size. In India, the States of Andhra Pradesh, Gujarat, Madhya Pradesh, Jharkhand and Chhattisgarh are the main source of Boswellia serrata. Regionally, it is also known by different names. The oleo gum-resins contain 30-60% resin, 5-10% essential oils, which are soluble in the organic solvents, and the rest is made up of polysaccharides. Gum-resin extracts of Boswellia serrata have been traditionally used in folk medicine for centuries to treat various chronic inflammatory diseases. The resinous part of Boswellia serrata possesses monoterpenes, diterpenes, triterpenes, tetracyclic triterpenic acids and four major pentacyclic triterpenic acids i.e. β-boswellic acid, acetyl-β-boswellic acid, 11-keto-β-boswellic acid and acetyl-11-keto-β-boswellic acid, responsible for inhibition of pro-inflammatory enzymes. Out of these four boswellic acids, acetyl-11-keto-β-boswellic acid is the most potent inhibitor of 5-lipoxygenase, an enzyme responsible for inflammation.

  4. Evaluation of the wound healing property of Commiphora guidottii Chiov. ex. Guid.

    Science.gov (United States)

    Gebrehiwot, Michael; Asres, Kaleab; Bisrat, Daniel; Mazumder, Avijit; Lindemann, Peter; Bucar, Franz

    2015-08-18

    The traditional use of the oleo-gum-resin of Commiphora guidottii Chiov. ex. Guid., which is commonly called scented myrrh, for topical treatment of wound is well documented. The major objective of the present study was to investigate the essential oil and resin obtained from C. guidottii for their potential wound healing properties. Due to their influence on the wound healing process, the anti-inflammatory and antimicrobial activities of scented myrrh have also been investigated. Powdered oleo-gum-resin of C. guidottii was steam-distilled to obtain essential oil, and the resin was extracted from the marc with MeOH and filtered. The TLC fingerprint profile of the resin has been recorded by using silica gel GF254 as stationary phase. The essential oil components were identified and quantified by GC-MS. Ointments prepared from the essential oil (4% v/w) and the resin (5% w/w) were used for wound healing activity tests. Toxicity of the formulated ointments was investigated according to Draize skin irritation test. Acute anti-inflammatory effect in mice was evaluated using carrageenan induced mouse hind paw oedema model. Antimicrobial activity tests were carried out using disk diffusion and broth dilution techniques against 21 pathogenic bacterial and 4 fungal strains. Ointment formulations of both the oil and resin were found to be non-irritant at the concentrations used and showed significant (p<0.05-0.001) increase in wound contraction rate, shorter epithelization time and higher skin breaking strength as compared to the negative control. Overall, the antibacterial and antifungal activities of the oil and resin were comparable with the standard antibiotics ciprofloxacin and griseofulvin, respectively. The results confirm that scented myrrh possesses genuine wound healing activity supporting the traditional use of the plant.

  5. Mistura de biodiesel de sebo bovino em motor diesel durante 600 horas Blend of biodiesel from beef tallow in a diesel engine during 600 hours of tests

    Directory of Open Access Journals (Sweden)

    Ila Maria Corrêa

    2011-07-01

    Full Text Available O biodiesel de sebo bovino é considerado uma alternativa de baixo custo e de grande disponibilidade por ser resíduo da produção agropecuária brasileira, que é uma das maiores do mundo. Raros são os trabalhos que mostram a utilização do biodiesel de sebo bovino em motores diesel. Assim, o objetivo deste trabalho foi verificar o efeito da mistura de biodiesel bovino na proporção de 5% ao óleo diesel comercial no desempenho do motor, possíveis consequências internas no motor e nas características do óleo lubrificante após o uso prolongado em motor diesel. Foram realizados ensaios em bancada dinamométrica utilizando um trator agrícola. O desempenho do motor foi determinado através da tomada de potência (TDP. O motor foi operado por 600h durante as quais foi determinada a potência, o consumo de combustível e analisadas as amostras de óleo lubrificante a cada 100h. Ao final do ensaio, o motor foi aberto e inspecionado. A análise do óleo lubrificante mostrou nível de contaminação crítico a partir das 400h, mas a inspeção visual do motor não detectou nenhum desgaste interno. O motor funcionou normalmente, embora tenha ocorrido tendência de redução na potência e aumento de consumo de combustível ao longo das 600h.Biodiesel from beef tallow has been considered a low-cost and high availability alternative due to be residue from the Brazilian livestock production, one of the world's largest. Papers that show the use of biodiesel from beef tallow in diesel engine are rare. The aim of this study was to investigate the effect of blend of biodiesel from beef tallow (B5 in commercial diesel oil on engine performance, analyzing possible internal consequences and characteristics of lubricating oil after the prolonged use in a diesel engine. Engine performance was evaluated through tractor power take off (PTO tests. The engine was operated for 600 hours. Power and fuel consumption were measured. Samples of lubricating oil were

  6. Implante de plug lacrimal termosensível para tratamento da síndrome da disfunção lacrimal Thermo sensitive punctum plug implant for the treatment of dysfunctional tear syndrome

    Directory of Open Access Journals (Sweden)

    Juliana Silverio

    2010-08-01

    Full Text Available OBJETIVO: Avaliar os resultados da oclusão de ponto lacrimal reversível com o uso de plugs termosensíveis para o tratamento da síndrome da disfunção lacrimal. MÉTODOS: Dezoito olhos de 9 pacientes com diagnóstico de olho seco foram selecionados e submetidos à oclusão reversível de ponto lacrimal com o uso de plugs termosensíveis, e acompanhados por 60 dias através de questionário OSDI e testes com fluoresceína, rosa bengala e Schirmer. RESULTADOS: Em todos os pacientes estudados houve melhora nos sintomas de olho seco e melhora nos parâmetros oftalmológicos pesquisados. Em apenas 1 dos pacientes a melhora dos sintomas foi pequena, e não houve diminuição na dependência de colírio lubrificante. Nos outros 8 pacientes houve diminuição no uso de colírio. Durante o estudo não ocorreram complicações infecciosas ou de extrusão. CONCLUSÃO: Oclusão temporária do ponto lacrimal com SmartPlug tm parece ser uma opção efetiva para o tratamento da síndrome da disfunção lacrimal quando o uso de lubrificantes não é suficiente. Sua colocação é relativamente simples e segura, porém estudos mais longos são necessários.PURPOSE: To evaluate the results of occlusion of the lacrimal punctum reversible with the use of thermosensitive plugs to treat the dysfunctional tear syndrome. METHODS: Eighteen eyes of 9 patients with dry eye were selected and subjected to reversible occlusion of the lacrimal punctum with the use of thermosensitive plugs and were followed for 60 days through the OSDI questionnaire, fluorescein staining, rose bengal staining and Schirmer's test. RESULTS: in all studied patients there was improvement in dry eye symptoms and in ophthalmic parameters studied. In only 1 of the patients, symptom improvement was small, and no decrease in dependence on lubricating drops. In the other 8 patients there was a decrease in the use of eye drops. During the study there were no infectious complications or extrusion

  7. A RACIONALIZAÇÃO DE RESÍDUOS COMO FATOR ECONÔMICOESTRATÉGICO PARA UMA EMPRESA: ANÁLISE DE UM SETOR DE TROCA DE ÓLEO

    Directory of Open Access Journals (Sweden)

    Fernanda Cristina B.P. Queiroz

    2013-06-01

    Full Text Available A questão ambiental vem sendo alvo de muito debate nos últimos anos. Entre os setores mais relacionados ao meio ambiente, em nível de preocupação ambiental, estão os postos de combustíveis. Essa preocupação ambiental deve ser demonstrada à população por meio da educação ambiental, utilizando o aspecto conscientização e sendo divulgada em ambientes suscetíveis a esse tipo de divulgação, como o ambiente de extensão universitária. Assim, o presente artigo tem o objetivo de analisar os resíduos gerados em um setor de troca de óleo, assim como propor ações de melhorias para minimizar os resíduos gerados por tal atividade. A metodologia utilizada neste trabalho consiste em uma pesquisa descritivo-exploratória, buscando observar e descrever a situação atual da empresa. Como resultados alcançados, foi percebido que em sua maioria, a empresa estudada oferece o tratamento adequado para seus resíduos, como é o caso da coleta de óleo queimado por uma empresa autorizada a tal. Porém, ainda possui alguns pontos a serem melhorados, como a venda de lubrificantes em embalagens de litro, onde poderiam estar fazendo-o a granel.

  8. Escenarios de costos generados por el uso del costeo variable

    OpenAIRE

    Zea Lourido, Felipe

    2013-01-01

    Este trabajo demuestra cómo el costeo absorbente, considerado por expertos en la materia, uno de los métodos de costeo usado frecuentemente por las organizaciones, con el propósito de determinar el valor de los inventarios y del costo de productos vendidos que intervienen en el estado de resultados para usuarios externos (stakeholders), al compararlo con el costeo variable, preferido por algunos administradores para toma de decisiones internas y usado en la preparación del estado de resultado...

  9. Ensaio de migração de cloretos para concreto: influência do número de fatias extraídas

    OpenAIRE

    Medeiros,Marcelo Henrique Farias de; Borba,André Yukio; Hoppe Filho,Juarez; Helene,Paulo Roberto do Lago

    2012-01-01

    Ensaios de migração de cloretos são usados para mensurar a capacidade do concreto em inibir o ataque por cloretos. Muitos pesquisadores realizam esse ensaio em uma fatia de concreto extraída da parte central dos corpos de prova cilíndricos, descartando cerca de 75% do concreto usado para moldar os corpos de prova. Esse fato gerou a questão: Seria possível extrair mais fatias de um mesmo corpo de prova sem se perder a confiança nos resultados? O principal objetivo desse trabalho é responder a ...

  10. Ensaio de migração de cloretos para concreto: influência do número de fatias extraídas

    OpenAIRE

    Medeiros, Marcelo Henrique Farias de; Hoppe Filho, Juarez; Borba, André Yukio; Helene, Paulo Roberto do Lago

    2012-01-01

    p. 475-481 Ensaios de migração de cloretos são usados para mensurar a capacidade do concreto em inibir o ataque por cloretos. Muitos pesquisadores realizam esse ensaio em uma fatia de concreto extraída da parte central dos corpos de prova cilíndricos, descartando cerca de 75% do concreto usado para moldar os corpos de prova. Esse fato gerou a questão: Seria possível extrair mais fatias de um mesmo corpo de prova sem se perder a confiança nos resultados? O principal objetivo desse trabalho ...

  11. Chloride migration test to concrete: influence of the number of slices extracted

    OpenAIRE

    Medeiros, Marcelo Henrique Farias de; Borba, André Yukio; Hoppe Filho, Juarez; Helene, Paulo Roberto do Lago

    2012-01-01

    Ensaios de migração de cloretos são usados para mensurar a capacidade do concreto em inibir o ataque por cloretos. Muitos pesquisadores realizam esse ensaio em uma fatia de concreto extraída da parte central dos corpos de prova cilíndricos, descartando cerca de 75% do concreto usado para moldar os corpos de prova. Esse fato gerou a questão: Seria possível extrair mais fatias de um mesmo corpo de prova sem se perder a confiança nos resultados? O principal objetivo desse trabalho é responder a ...

  12. Análisis técnico de la vida útil de un lubricante de aceite mineral, para motores de combustión interna a gasolina de los vehículos de servicio de taxis de la ciudad de Cuenca

    OpenAIRE

    Jaramillo Sari, Diego Fernando; Redrován Macas, Luis Fernando; Urgilés Contreras, Diego René

    2011-01-01

    Durante el proyecto se realizó una investigación del parque automotor de taxis de la ciudad de Cuenca, determinando el tipo de aceite usado y su período de cambio. De esta manera, se plantea una encuesta, con la que se pueda determinar el tipo aceite más usado en los vehículos de servicio de taxis. El estudio se realizó en Vehículos de transporte público de servicio de taxi de la ciudad de Cuenca, porque están sometidos a periodos de funcionamiento más extensos, y producen desechos automotric...

  13. UV-vis in situ spectrometry data mining through linear and non linear analysis methods

    OpenAIRE

    Liliana López-Kleine; Andrés Torres

    2014-01-01

    Los espectrómetros UV-visibles son captores que registran la absorbancia de luz emitida por partículas suspendidas en el agua a diferentes longitudes de onda y proporcionan mediciones en continuo, las cuales pueden ser interpretadas como concentraciones de parámetros comúnmente usados para evaluar el estado físico-químico de cuerpos de agua. Parámetros clásicos usados para detectar la presencia de contaminación en el agua son los sólidos suspendidos totales (TSS) y la demanda química de oxíge...

  14. Ampliación tv-learning: aprendizaje a distancia con smart tvs

    OpenAIRE

    Jaldo-Asenjo, Jesús

    2015-01-01

    Uno de los aparatos eléctricos más usados en los hogares del mundo es la televisión. Durante años se ha usado como un medio de comunicación, en el cuál podías enterarte de noticias ocurridas en el mundo, además de poder pasar tu tiempo libre viendo películas o series. Pero en la actualidad, con la llegada de Internet, las televisiones también cambiaron y ahora son aparatos inteligentes y capaces de conectarse a Internet. En poco se parecen los primeros modelos con los modelos actuales, tan...

  15. Diseño y simulación de control avanzado para un sistema de refrigeración aplicado a la industria agrolimentaria

    OpenAIRE

    Aramburú Pardo Figueroa, Andrés

    2017-01-01

    La tesis elabora un sistema de control para un modelo matemático que represente el comportamiento dinámico de un sistema de refrigeración por compresión de vapor utilizado en procesos de conservación de productos en la industria agroalimentaria. El sistema de control se basará en los nuevos avances tecnológicos usados en refrigeradores (Smart Inverter, Digital Inverter), los cuales presentan ahorros en el consumo energético y será diseñado para ser usado en cámaras de refrigeración de mango. ...

  16. SISTEMAS DE AUTOMAÇÃO RESIDENCIAL DE BAIXO CUSTO: UMA REALIDADE POSSÍVEL

    OpenAIRE

    Antonio Luiz P. S. Campos; Michel Madson ALves Cabral

    2009-01-01

    RESUMO O presente trabalho apresenta uma introdução à automação residencial e apresenta dois sistemas de baixo custo para serem usados com esse propósito. O primeiro sistema foi implementado para controle liga/desliga de uma bomba d’água para reservatórios. O segundo foi projetado para auxiliar pessoas com necessidades especiais ou para ser usado em auditórios, auxiliando no início e fim das apresentações, ligando e desligando as lâmpadas. Ambos os sistemas são de baixo custo e têm boa fun...

  17. Quality characteristics and thermal behavior of buriti (Mauritia flexuosa L.) oil; Parámetros de calidad y comportamiento térmico del aceite de buriti (Mauritia flexuosa L.).

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, M.L.F.; Chisté, R.C.; Polachini, T.C.; Sardella, L.A.C.Z.; Aranha, C.P.M.; Ribeiro, A.P.B.; Nicoletti, V.R.

    2017-07-01

    This work reports a complete characterization of buriti oil. Physicochemical properties were determined according to AOCS methodologies and thermophysical properties were measured using a controlled stress rheometer and a digital electronic density meter. β-carotene and tocopherol contents were obtained using HPLC systems. Fatty acids and acylglycerol classes were determined using GC and HPSEC systems, respectively, while triacylglycerol composition was estimated using the software PrOleos. Thermal behavior (crystallization and melting) was analyzed using a DSC. The results attested high levels of total carotenoids with β-carotene as the major one; total tocopherols contained α- and β-tocopherols which accounted for 91% of the total; and monounsaturated fatty acids were mainly represented by oleic acid. The results showed close agreement between density and viscosity of buriti and olive oils. The crystallization and melting peaks occurred at -43.06 °C and -2.73 °C, respectively. These properties enable Buriti oil to be recommended as an excellent alternative for enriching foods with bioactive compounds. [Spanish] En este trabajo realiza una completa caracterización del aceite de buriti. Las propiedades fisicoquímicas se llevaron a cabo de acuerdo con las metodologías AOCS y se midieron las propiedades termo-físicas usando un reómetro de esfuerzo controlado y un medidor de densidad electrónico digital. Se obtuvieron los contenidos de β-caroteno y tocoferol utilizando HPLC. Los ácidos grasos y las diferentes clases de acilgliceroles se determinaron utilizando GC y HPSEC, respectivamente, mientras que la composición de triacilglicéridos se estimó utilizando el software PrOleos. El comportamiento térmico (cristalización y fusión) se analizó utilizando un DSC. Los resultados ponen de manifiesto altos niveles de carotenoides totales con β-caroteno como mayoritario, tocoferoles totales, con α- y β-tocoferoles que representan el 91% del total, y

  18. Aplicación exitosa de un fluido de perforación densificado con ORIMATITA® en condiciones de alto caudal y alta densidad en el Norte de Monagas, Venezuela

    NARCIS (Netherlands)

    Rengifo, R.; Quercia Bianchi, G.; Quiroga, F.; Chacón, O.; Castillo, D.; Molina, P.; Belisario, R.; Ojeda, F.; Mata, G.; Barrero, H.

    2003-01-01

    La Barita, mineral constituido mayoritariamente por Sulfato de Bario, ha sido por muchos años el principal agente densificante usado por la industria de perforación de pozos de petróleo y/o gas. Es un hecho bien conocido que las reservas mundiales de este mineral han venido disminuyendo, mientras

  19. Experiencias en el uso de la ORIMATITA® como densificante de fluidos de perforación en el Norte de Monagas, Venezuela

    NARCIS (Netherlands)

    Rengifo, R.; Quercia Bianchi, G.; Quiroga, F.; Chacón, O.; Ojeda, F.; Rollinson, J.; Rivers, R.; Tovar, J.G.

    2004-01-01

    La barita ha sido predominantemente el material densificante usado en los fluidos de perforación. Las minas de barita se encuentran ubicadas lejos de los centros de consumo, lo cual, debido al transporte, incrementa el costo final del mineral. En Venezuela, dentro de la industria petrolera nacional,

  20. El IDRC en México

    International Development Research Centre (IDRC) Digital Library (Canada)

    de salud. Cuando México adhirió al TLCAN, se comprometió a eliminar el DDT, un pesti- cida usado ... (INSP) elaboró, con apoyo del IDRC, una ... mientas de trabajo a distancia que reducen ... la reconstrucción, la seguridad alimentaria y las ...

  1. El laboratorio en la investigación cerámica. Análisis dilatométrico

    Directory of Open Access Journals (Sweden)

    Fernando Arredondo

    2017-06-01

    Full Text Available Se estudian las variaciones dimensionales que experimenta una arcilla durante su cocción, así como los métodos actuales para determinarlas. Se describe el dilatómetro, usado en el laboratorio de cerámica del I. T. C. G. para realizar el análisis dilatométrico.

  2. Una prueba fuera del laboratorio de una interfaz cerebro computador basada en potenciales de estado estable evocados visualmente

    Directory of Open Access Journals (Sweden)

    Eduardo Francisco Caicedo Bravo

    2016-06-01

    Conclusiones: Se pudo mostrar un sistema BCI basado en SSVEP de bajo costo, probado en un evento público, sin procedimientos de calibración, de fácil instalación y usado por personas en un amplio rango de edades. Los resultados muestran que es factible llevar este tipo de sistemas a ambientes fuera del laboratorio.

  3. Frecuencias alélicas, genotípicas y haplotípicas HLA-A, HLA-B, HLA-DRB1 en donantes fallecidos, Medellín, Colombia

    Directory of Open Access Journals (Sweden)

    Libia M. Rodríguez

    2007-12-01

    Conclusiones. Estos resultados corroboran la composición triétnica de nuestra población, en la cual predomina el grado de mezcla caucásica, a diferencia de otras latinoamericanas, y podrán ser usados como referencia para otros estudios y aplicaciones en esta población.

  4. ToxFAQs

    Science.gov (United States)

    ... hidrógeno y flúor Formaldehyde | Formaldehido Fuel Oils / Kerosene | Aceites combustibles G Gasoline, Automotive | Gasolina de automóvil Glutaraldehyde * ... Uranium * Other Languages... Used Mineral-based Crankcase Oil | Aceite Usado de Cárter V Vanadium * Other Languages... ...

  5. Avaliação da estabilidade da emulsão óleo/água proveniente dos resíduos de uma indústria beneficiadora de gemas frente ao uso de diferentes surfactantes

    Directory of Open Access Journals (Sweden)

    Simone Stülp

    2013-01-01

    Full Text Available A reutilização dos resíduos gerados pelos diversos setores industriais é uma prática que cada dia é mais utilizado, devido ao comprometimento das indústrias com sua responsabilidade social (proteção ao ambiente ou a exigências dos órgãos de proteção ambiental, já que muitos resíduos não possuem o devido descarte. Na indústria de beneficiamento de gemas a busca pelo reaproveitamento dos resíduos também tem se tornado uma realidade. O presente trabalho tem como objetivo avaliar o reaproveitamento do óleo utilizado como lubrificante na indústria de beneficiamento de gemas, juntamente com água, surfactantes e anticorrosivos. Para preparo das emulsões foram utilizadas amostras de óleo diesel utilizado como lubrificante no setor de corte deste tipo de indústria, mais os seguintes surfactantes: Tween 20, Tween 80, Lauril Éter Sulfato de Sódio (SLES e Cetiol HE. Depois de realizadas análises de pH, viscosidade, densidade e separação de fases nestas emulsões, chegou-se a conclusão que o surfactante Lauril Éter Sulfato de Sódio proporcionava a melhor formulação. Utilizando-se deste resultado, foram preparadas novas emulsões com o surfactante Lauril Éter Sulfato de Sódio e um anticor