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Sample records for opilones defesa quimica

  1. A fragilidade do Ministério da Defesa brasileiro

    Directory of Open Access Journals (Sweden)

    Jorge Zaverucha

    2005-11-01

    Full Text Available O presente artigo apresenta os diversos momentos por que passou o Ministério da Defesa, desde sua criação no segundo mandato presidencial de Fernando Henrique Cardoso (1999-2002 até o atual governo de Luís Inácio Lula da Silva (2003-2006, com os respectivos ministros da Defesa. Visto como uma etapa importante na reconstitucionalização do país, na medida em que prevê a submissão dos comandantes das Forças Armadas a um ministro civil, e embora alguns analistas considerem que essa submissão de fato ocorre, procuramos indicar as resistências e as insubordinações militares ao poder civil, provenientes de um legado autoritário. Na medida em que o Ministério da Defesa não consegue implementar uma política própria, em que os militares seguiriam as orientações dos civis, o artigo conclui considerando a fragilidade política e institucional do Ministro da Defesa, civil, ante o os comandos militares, que conservam alto grau de autonomia decisória em relação à estrutura do Ministério.

  2. Modelo de capacidades e maturidade para defesa cibernética

    OpenAIRE

    Sylvio Andre Diogo Silva

    2011-01-01

    Uma implantação eficaz de defesa cibernética requer o desenvolvimento de esforços coordenados nas seguintes capacidades-chave: detecção de ataques, mecanismos de defesa, monitoramento de situação, comando e controle, aprimoramento de estratégias e táticas e desenvolvimento seguro de sistemas. A dissertação apresenta um modelo de capacidades para defesa cibernética. A partir das seis capacidades-chave, foi identificado um modelo com capacidades essenciais para a defesa cibernética. O modelo de...

  3. INDEPENDÊNCIA OU MORTE: A APOPTOSE COMO MECANISMO DE DEFESA

    OpenAIRE

    Gasques, Luciano Seraphim; Galvanini, Paulo Alexandre; Favaretto, Fernando; Santana, Tamara Francislaine; Pamphile, João Alencar

    2015-01-01

    Nas relações desarmônicas, os hospedeiros tendem a selecionar mutações que conferem resistência aos patógenos, enquanto estes selecionam as que neutralizam a resistência. Dessa forma, o processo evolutivo desencadeia nos mais diversificados mecanismos de defesa, entre eles, um mecanismo pouco explorado, à apoptose. Esta revisão teve como objetivo verificar os principais sistemas biológicos que apresentam a apoptose como mecanismo de defesa. Entre os principais sistemas estudados neste trabalh...

  4. Legitimidade ativa da defensoria pública para a defesa coletiva dos direitos do consumidor

    OpenAIRE

    Simões, Bruna

    2012-01-01

    O presente trabalho tem como objetivo uma análise da legitimidade ativa para a defesa de direitos coletivos do consumidor, especialmente sobre a legitimidade da Defensoria Pública. A dissertação pretende estudar quais os limites da Defensoria Pública na defesa desses direitos, bem como o fundamento para a sua atuação. Iniciaremos com um breve histórico do direito do consumidor no mundo para posteriormente analisar o desenvolvimento e as disposições constitucionais e legais sobr...

  5. Grace buys aquatic quimica to boost water treatment stake

    International Nuclear Information System (INIS)

    Hunter, D.

    1993-01-01

    How W.R. Grace (Boca Raton, FL) president and newly appointed CEO J.P. Bolduc plans to expand Grace's core businesses following his drastic portfolio pruning during the past 18 months is a key question for Grace watchers. Grace's acquisition of $70-million/year water treatment firm Aquatec Quimica (Sao Paulo) is one indicator. Grace's $300-million/year Dearborn water treatment business is currently a weak number three [in the world market], and we want to be number one or number two, nothing less, Bolduc insists. The Aquatc buy meets his criterion of a synergistic and strategic acquisition with which he plans to expand the business, backed by more focused R ampersand D. Disposal last month of Homco oil field services operation, for $98.5 million, takes Bolduc toward his $500-million target for the year for asset sales. These totaled $1.1 billion at the end of 1992. The final tally will be more than the $1.5-billion target previously stated, Bolduc says, due to higher realizations on certain sales and additions to the list, including Grace Culinary and Colowyo Coal

  6. Ação de herbicidas sobre mecanismos de defesa das plantas aos patógenos

    OpenAIRE

    Rizzardi Mauro Antônio; Fleck Nilson Gilberto; Agostinetto Dirceu; Balbinot Jr. Alvadi Antônio

    2003-01-01

    As plantas necessitam defender-se continuamente do ataque de agentes biológicos e de estresses do ambiente. A imobilidade e a falta de sistema imunológico, como ocorre em animais, fizeram com que as plantas desenvolvessem mecanismos de defesa, em que cada célula possui tanto capacidade de defesa induzida quanto pré-formada. No entanto, esses mecanismos podem ser influenciados pelo uso de herbicidas. A presente revisão objetivou apresentar os efeitos de herbicidas em mecanismos de defesa das p...

  7. Estratégia Nacional de Defesa: comentários dissidentes

    Directory of Open Access Journals (Sweden)

    PAULO ROBERTO DE ALMEIDA

    2009-03-01

    Full Text Available

    O artigo aborda a questão de defesa no

    Brasil. Nesse sentido, aborda a divulgação de um

    projeto do governo brasileiro para os próximos anos.

  8. A Indústria de Defesa, Inovação e Competitividade

    OpenAIRE

    Fernandes, Vítor Ramon

    2007-01-01

    O presente artigo pretende contribuir para um melhor conhecimento da indústria de defesa, no sentido de se entender de que forma a inovação e a transferência de tecnologia concorrem para o aumento da competitividade da economia. Após uma análise dos principais desenvolvimentos nesta indústria no pós-Guerra Fria, apresentam-se e analisam-se algumas medidas existentes para o desenvolvimento de uma estratégia para o caso português, que permita beneficiar da inserção...

  9. OS MECANISMOS DE DEFESA PRESENTES NA NEUROSE OBSESSIVA: UM OLHAR SOBRE A FORMAÇÃO SINTOMÁTICA.

    OpenAIRE

    Henrique Guilherme Scatolin

    2014-01-01

    Este artigo pretende enfocar os principais mecanismos de defesa presentes na neurose obsessiva, tais como o deslocamento, a formação reativa, o isolamento e a anulação. Para desenvolver tal discussão, parte de uma releitura das obras pré-psicanalíticas até Inibições, Sintomas e Ansiedade de 1926, enfocando nesta a compreensão freudiana da formação do sintoma obsessivo e dos seus principais mecanismos de defesa. Conclui que, para uma melhor compreensão da etiologia sintomática nesta neu...

  10. Los manuales de quimica en Espana (1788--1845): Protagonistas, terminologia, clasificaciones y orden pedagogico

    Science.gov (United States)

    Munoz Bello, Maria Rosa

    La presente tesis doctoral es una investigacion sobre los manuales de quimica utilizados en Espana de 1788 a 1845. Este trabajo proporciona una perspectiva general de un tema relevante en las ultimas decadas en Historia de la Ciencia, el estudio de los libros de texto. De acuerdo con las ultimas investigaciones realizadas en este terreno, el acto pedagogico es considerado como un proceso creativo, como espacio de encuentro de actores e intereses muy diversos, matizando las ideas defendidas por Thomas S. Kuhn. Recordemos que segun Kuhn, los libros de texto ofrecen una vision consensuada y normalizada del estado de la ciencia de su epoca, por lo que sus autores eliminan deliberadamente toda controversia y presentan asi una imagen distorsionada de la actividad cientifica. En cambio, se ha mostrado, por ejemplo, que en la ensenanza participan no solamente profesores y alumnos sino tambien otros muchos actores y todos ellos no unicamente con intereses puramente pedagogicos sino tambien con diversos intereses politicos y economicos que pueden conocerse a traves del estudio de los manuales. En esta tesis se pretende analizar los manuales de quimica en Espana desde 1788 hasta 1845. Para poder llevar a cabo la investigacion ha sido necesario precisar el objeto de estudio (libro de texto de quimica) durante el periodo estudiado (1788-1845) ya que no es adecuado adoptar la imagen actual de una disciplina que sufrio sustanciales cambios durante la epoca estudiada. Esta investigacion se centra en un momento especialmente importante para la quimica y que algunos historiadores han llegado a considerar "revolucionario". Durante estos anos se produjo un cambio importante en las teorias quimicas sobre la combustion y el concepto de elemento, asi como una reforma terminologica que originaron la aparicion de importantes controversias. Ademas, debido a la relacion de la quimica con otras disciplinas como la historia natural o la fisica ha sido necesario restringir el objeto de estudio

  11. Risk analysis in the chemical industry; Analisis de riesgos en la industria quimica

    Energy Technology Data Exchange (ETDEWEB)

    Rea Soto, Rogelio; Sandoval Valenzuela, Salvador [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    2000-07-01

    The Instituto de Investigaciones Electricas has a group of risk analysis (GAR), specialized in the most advanced methodologies to apply them in diverse industries of the productive sector, such as the nuclear, the oil and the chemical industries. In this work the integrated methodology that the GAR uses to make risk analysis in the chemical and oil industries is described. These analyses have as an objective to make a meticulous evaluation of the system design, the operation practices, the maintenance and inspection policies and the emergency plans. [Spanish] El Instituto de Investigaciones Electricas cuenta con un grupo de analisis de riesgo (GAR), especializado en las metodologias mas avanzadas para aplicarlas en diversas industrias del sector productivo, como lo son la nuclear, la petrolera y la quimica. En este trabajo se describe la metodologia integrada que el GAR utiliza para realizar analisis de riesgos en las industrias quimica y petrolera. Estos analisis tienen como objetivo realizar una minuciosa evaluacion del diseno del sistema, las practicas de operacion, las politicas de mantenimiento e inspeccion y los planes de emergencia.

  12. Defesas químicas de plantas: fitoalexinas Chemical defense of plants: phytoalexins

    Directory of Open Access Journals (Sweden)

    Márcia Regina Braga

    1987-01-01

    Full Text Available A resistência de plantas ao ataque de microorganismos causadores de doenças relaciona-se à presença de barreiras físicas e (juímicas de defesa. Dentre as barreiras químicas destacam-se as fitoalexinas, substâncias fungitoxicas sintetizadas de novo pelas plantas principalmente após a invasão ou o contato de seus tecidos com microorganismos, Essas substâncias englobam vários grupos compostos naturais tais como terpenos, isoflavonóides e poliacetilenos e seu acúmulo pode ser induzido por organismos vivos, seus produtos (elíciadores ou ainda agentes químicos, como sais de metais pesados, ou físicos (congelamento, luz U.U.. Alguns aspectos abordados nesta revisão são: a ocorrência de fitoalexinas em angiospermas, a relação entre sua natureza química e o grupo taxonômico das plantas que as produzem, a sua ação sobre organismos pró e eucarióticos. São descritas também os fatores que interferem nas respostas das plantas aos agentes indutores e as técnicas usuais para a indução e detecção de fitoalexinas. O papel dos eliciadores na indução da sâitese de fitoalexinas e o mecanismo pelo qual exercem sua função indutora são discutidos. Nesse contexto está incluída a teoria das oligossacarinas, fragmentos de parede celular que parecem controlar não só a resposta de defesa em plantas mas também outros fenômenos fisiológicos em plantas.Chemical defense of plants: phytoalexins - This review describes the concept of phytoalexins as a chemical defense of plants against microorganisms as well as a response of plants to chemical or physical agents. The current information on phytoalexins is presented, regarding the following aspects: occurrence in angiosperms; relation-snips between chemical composition and taxonomy; toxicity; factors affecting plant response; techniques for induction and detection of phytoalexins; role of elicitors and mechanisms of action. The latter includes the oligosaccharins-fragments of cell

  13. O orçamento de defesa dos EUA: racionalidade X pressões domésticas

    Directory of Open Access Journals (Sweden)

    Juliano da Silva Cortinhas

    2014-12-01

    Full Text Available Ao longo das últimas décadas, gastos substanciais com defesa têm sido mantidos pelos EUA. Essas despesas simbolizam uma reação do país a condições sistêmicas, mas também se relacionam com os interesses de agentes domésticos que trabalham para sua manutenção. Neste artigo, pretende-se examinar como funcionou a combinação dessas pressões no período que marcou o fim da Guerra-Fria, por meio da comparação entre os orçamentos de defesa da primeira gestão de Reagan (1981-1984 e da Administração Bush (1989-1992.

  14. Agressividade na condução e mecanismos de defesa em condutores infractores : perspectiva psicodinâmica

    OpenAIRE

    Rosário, Luís Miguel Agulheiro Santos Bonsucesso do

    2009-01-01

    Tese de mestrado, Psicologia (Psicologia Clínica e da Saúde - Núcleo de Psicologia Clínica Dinâmica), Universidade de Lisboa, Faculdade de Psicologia e de Ciências da Educação, 2009 Esta investigação teve como objectivo estudar a comparação entre a agressividade na condução e os mecanismos de defesa em condutores infractores. Para tal, recorreu-se a uma medida de auto-relato da agressividade na condução (DDDI) e a um inventário de mecanismos de defesa com uma componente semi-projectiva (DM...

  15. A inserção externa da indústria brasileira de defesa: 1975-2010

    OpenAIRE

    Moraes, Rodrigo Fracalossi de

    2012-01-01

    O texto analisa o histórico da inserção externa da indústria brasileira de defesa e o papel que o mercado externo desempenhou - e pode vir a desempenhar - para esta indústria. Demonstra-se que, para um país no qual as aquisições internas de equipamentos militares são relativamente baixas como o Brasil, as exportações desempenham papel essencial à manutenção de uma indústria de defesa economicamente viável - ou seja, que possa produzir itens com custos unitários não muito elevados e seja capaz...

  16. A Estratégia Nacional de Defesa do Brasil e a dos outros BRICs em perspectiva comparada

    Directory of Open Access Journals (Sweden)

    João Fábio Bertonha

    2013-12-01

    Full Text Available O objetivo do presente artigo é examinar as Estratégias Nacionais de Defesa dos quatro países que formam o grupo dos BRICs (Brasil, Rússia, Índia, e China com vistas a verificar como os quatro países avaliam o cenário estratégico do século 21, especialmente no tocante ao equilíbrio de forças entre as grandes potências, aos seus entornos geográficos imediatos e à relação com os EUA. As semelhanças e diferenças de avaliação e o como isso se reflete nas respectivas políticas de defesa serão abordadas. Dentre os quatro casos, o brasileiro será especialmente enfocado.

  17. Ação de herbicidas sobre mecanismos de defesa das plantas aos patógenos

    Directory of Open Access Journals (Sweden)

    Rizzardi Mauro Antônio

    2003-01-01

    Full Text Available As plantas necessitam defender-se continuamente do ataque de agentes biológicos e de estresses do ambiente. A imobilidade e a falta de sistema imunológico, como ocorre em animais, fizeram com que as plantas desenvolvessem mecanismos de defesa, em que cada célula possui tanto capacidade de defesa induzida quanto pré-formada. No entanto, esses mecanismos podem ser influenciados pelo uso de herbicidas. A presente revisão objetivou apresentar os efeitos de herbicidas em mecanismos de defesa das plantas contra patógenos, bem como analisar as possíveis conseqüências desse conhecimento no manejo de plantas daninhas e de culturas. Alguns herbicidas influenciam a severidade de doenças, induzindo ou inibindo a síntese de fitoalexinas. Herbicidas do grupo químico difeniléteres geram espécies reativas de oxigênio, as quais mediam a ativação de genes de defesa responsáveis pela síntese de fitoalexinas e também por reação de hipersensibilidade. O uso de subdoses de glyphosate ocasiona efeito contrário, diminuindo a produção de fitoalexinas e aumentando a severidade de doenças. A constatação desses efeitos requer a adoção de estratégias de manejo que minimizem seus impactos negativos ou que se beneficiem desses efeitos, como pode ocorrer quando do uso de bioherbicidas.

  18. OS MECANISMOS DE DEFESA PRESENTES NA NEUROSE OBSESSIVA: UM OLHAR SOBRE A FORMAÇÃO SINTOMÁTICA.

    Directory of Open Access Journals (Sweden)

    Henrique Guilherme Scatolin

    2014-02-01

    Full Text Available Este artigo pretende enfocar os principais mecanismos de defesa presentes na neurose obsessiva, tais como o deslocamento, a formação reativa, o isolamento e a anulação. Para desenvolver tal discussão, parte de uma releitura das obras pré-psicanalíticas até Inibições, Sintomas e Ansiedade de 1926, enfocando nesta a compreensão freudiana da formação do sintoma obsessivo e dos seus principais mecanismos de defesa. Conclui que, para uma melhor compreensão da etiologia sintomática nesta neurose, é necessário analisar cada mecanismo em sua particularidade; já que este expressa a singularidade de cada sintoma em sua essência. Estes mecanismos de defesa podem ser considerados como uma máscara que encobrem o sintoma, mas ao encobrir, revelam todos os desejos recalcados, denotando a história singular de cada paciente.

  19. Development and application of safety and waste management protocols for the Laboratorio de Ingenieria Quimica

    International Nuclear Information System (INIS)

    Scott Jimenez, Stephanie

    2014-01-01

    Security and waste management protocols are developed for the laboratory de la Escuela de Ingenieria Quimica at the Universidad de Costa Rica. The protocols are elaborated according to the provisions and guidelines stipulated in the Costa Rican legislation, technical references and documents issued by the chemical regency of the Universidad de Costa Rica. An inspection guide was prepared and applied as diagnostic tool for the evaluation of the safety conditions and handling of chemical substances in the laboratory. Inspections of the physical plant and interviews to area managers were realized. The results obtained have allowed to implement improvements of the activities in safe working environment conditions and teaching; and an adequate signaling and demarcation of the facilities, location and recharge of fire extinguishers. An emergency plan is elaborated for the Laboratorio de Ingenieria Quimica, by performing a sequence of stages proposed by Comision Nacional de Emergencias. In addition, a plan for the safe and effective management of waste generated is made based on the reagents most frequently used in the different practices. The method of storage Flinn Scientific was selected as the most appropriate method to organize and distribute chemicals in the laboratory reagent storage area, obtaining the highest percentage in the decision matrix. Security aspects in the registration and documentation system implemented in the laboratory administration are evaluated by a checklist. This assessment has allowed to propose improvements, to increase the efficiency and to obtain an easy storage, control and a fast search of the information by means of the procedures documented and elaborated. Some of the recommendations proposed have been the establishment of an emergency action committee, the reduction of unnecessary quantities of chemicals stored, training on safety, operation of fire extinguisher and first aid; and construction of an emergency exit, etc. [es

  20. Vozes católicas no Congresso Nacional: aborto, defesa da vida Abortion: defending life

    Directory of Open Access Journals (Sweden)

    Myriam Aldana

    2008-08-01

    Full Text Available Serão analisados neste ensaio alguns dos debates em torno da temática do aborto que ocorreram no Congresso Nacional com a ocasião da Proposta de Emenda Constitucional - central da discussão foi a defesa da vida. Serão identificados os blocos discursivos que apresentam posições contrárias e favoráveis à interrupção da gravidez, os princípios religiosos ou determinismo biológico em que essas posições estão ancoradas e as formas como esses discursos permanecem. Ainda são levantadas as diferentes compreensões do que é vida, decorrentes dos argumentos utilizados nesses discursos, os quais estão alinhados com os posicionamentos da Igreja Católica e do Movimento Feminista, atores sociais protagonistas desse embate.This essay will analyze some of the debates around abortion in the National Congress due to the Constitutional Amendment Bill - PEC25/95, by Deputy Severino Cavalcanti (PPB/PE, where the main issue was precisely life defense. The discursive blocks that present the debate in relation to pregnancy interruption, the religious principles or biological determinism on which those debates are based, and the ways in which such discourses are maintained will be identified. Distinct understandings of life, as a result of the points used in such discourses, which are aligned with the position of the Catholic Church and the Feminist Movement - the social actors of this debate- are also discussed here.

  1. A questão amazônica e a política de defesa nacional

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    Octavio Penna Pieranti

    Full Text Available A preservação da Amazônia é uma questão crucial para a integridade territorial do país que se torna ainda mais relevante num cenário marcado pela agressão ao meio ambiente e pela escassez global de recursos naturais no raiar do século XXI. A politica de meio ambiente, a estrutura para sua efetiva implementação e o modelo de preservação que o governo brasileiro vem adotando para a região têm recebido críticas em todos os países desenvolvidos, vindas de autoridades governamentais e da sociedade civil. O que se questiona é a inexistência de estrutura apropriada para a proteção da Amazônia como um bem natural, e essas críticas são preocupantes não apenas por sua origem e alvo, mas também pelo seu conteúdo, pois sugerem modificações que ferem a soberania e a integridade territorial do país. Com base numa pesquisa bibliográfica, este artigo procura discutir a forma de inserção da questão amazônica - e conseqüentemente a política ambiental - no debate sobre a política de defesa nacional. Uma vez que os problemas dessa região envolvem aspectos pertinentes tanto à política de meio ambiente quanto à de defesa, o que se pretende aqui é discutir a necessidade de adoção de um modelo de preservação do ecossistema da Amazônia que conte com maior apoio das Forças Armadas. Reformulada a partir da década de 1990, a política de defesa nacional tem procurado se adequar a uma drástica redução de custos, sem que isso prejudique o desempenho de suas funções essenciais. Essa política se baseia, ainda, numa sistemática de defesa mantida mesmo em tempos de paz - principalmente, em relação á garantia da soberania nacional - e dessa forma, está vinculada á proteção do território e dos recursos naturais brasileiros. Ao se discutir as implicações que a política ambiental traz para a política de defesa nacional, o objetivo é abordar a defesa do meio ambiente no Brasil como uma forma de resguardar a pr

  2. A representação, o afeto e a defesa no Projeto de uma Psicologia (1895

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    Jaqueline Cristina Rossi

    Full Text Available Neste artigo, examinaremos a generalização proposta por Freud em Projeto de uma psicologia científica (1895 do conceito de representação afetiva de Breuer apresentado nos Estudos sobre a histeria (1895. Mais que mostrar que Freud adota o conceito de representação afetiva de Breuer, pretendemos verificar como Freud generaliza este conceito do contexto exclusivamente patológico para o contexto de funcionamento normal, a fim de explicar os mecanismos de defesa.

  3. Mudança dos mecanismos de defesa e das características de personalidade no processo terapêutico

    OpenAIRE

    Loureiro, Diana de Paiva Silvano Calado

    2012-01-01

    Dissertação de Mestrado apresentada ao ISPA - Instituto Universitário, na especialidade de Psicologia Clínica Os mecanismos de defesa são um dos conceitos mais originais e uma das mais duráveis contribuições teóricas da psicanálise. O objetivo desta revisão de literatura consiste em aprofundar questões relacionadas com o desenvolvimento e evolução de conceções acerca do conceito, compreender funções relevantes dos mecanismos de defesa, e sobretudo fazer uma pesquisa acerca da i...

  4. Os intelectuais e a defesa da preservação do patrimônio em Porto Alegre (1970)

    OpenAIRE

    Maria Angélica Zubaran

    2017-01-01

    Este estudo analisa as narrativas em defesa da preservação e salvaguarda do patrimônio histórico da cidade de Porto Alegre na imprensa local, na década de 1970. Investiga-se o discurso dos "intelectuais do patrimônio" e os novos valores, significados e usos que atribuíram ao patrimônio histórico da cidade, na luta pela sua preservação e salvaguarda. O foco deste artigo é as narrativas do jornalista Alberto André e do historiador Sérgio da Costa Franco e suas múltiplas representações de memóri...

  5. Estudo dos mecanismos de defesa de plantas de milho atraves das abordagens de analise proteomica e mapeamento de QTLs

    OpenAIRE

    Adriana Moreira da Silva e Silva

    2005-01-01

    Resumo: As plantas são capazes de responder e resistir ao ataque de patógenos ativando uma diversidade de estratégias de defesa. A maioria delas exibe uma estratégia geral onde são ativadas respostas bioquímicas de maneira coordenada, incluindo a reprogramação do metabolismo celular, o reforço das barreiras celulares e produção de compostos antimicrobianos e proteínas que agem diretamente sobre o patógeno. Mas existem também respostas específicas das plantas a determinados patógenos, onde são...

  6. Poder compensatório: coordenação horizontal na defesa da concorrência

    Directory of Open Access Journals (Sweden)

    Paulo Furquim de Azevedo

    2009-12-01

    Full Text Available Condutas comerciais uniformes com o propósito de estabelecer preços são condenadas por sua mera existência. Implicitamente, a política de defesa da concorrência atribui probabilidade desprezível de esse tipo de arranjo gerar benefícios sociais líquidos. Como consequência, o conceito de 'poder compensatório', referente à organização de produtores para fazer frente a um monopsônio (ou de compradores para fazer frente ao poder de monopólio, tem papel marginal nas políticas de defesa da concorrência. Este artigo argumenta que a coordenação com o objetivo de uniformização de conduta comercial pode, em algumas circunstâncias, aumentar o bem-estar social. Assim, tais formas de coordenação não poderiam ser condenadas prima facie, visto que podem gerar poder compensatório, atenuando os efeitos de poder de mercado pré-existente. Essa constatação revela a necessidade de uso mais intenso de teoria econômica em análises antitruste, sobretudo nos casos em que o conhecimento econômico desafia a jurisprudência.Agreements among competitors to negotiate prices are challenged by antitrust authorities as per se illegal. Implicitly competition policy assigns negligible probability to such arrangements to yield net social benefits. This statement implies that countervailing power - related to the collective action of competitors in order to counteract the market power of a supplier or consumer - has a secondary role on competition policy. This paper argues that under particular conditions agreements among competitors in order to negotiate prices may increase social welfare. As a consequence, this type of arrangement should not be charged as per se illegal, inasmuch as they may create countervailing power and mitigate the effects of pre-existent market power. The analysis suggests that economic theory should be more intensely used in antitrust analysis, mainly when there are conflicting results with the established court decisions.

  7. TENDÊNCIAS DA REFORMA SANTINARIA BRASILEIRA NOS INTELECTUAIS DO FÓRUM EM DEFESA DO SUS DO MUNICIPIO DE CAMPINA GRANDE/PB.

    Directory of Open Access Journals (Sweden)

    Gerciane da Rocha Souza Andrade

    2017-04-01

    Full Text Available A presente pesquisa de iniciação cientifica discute a Reforma Sanitária Brasileira (RSB e suas respectivas bandeiras de lutas, seu desenvolvimento no processo de contrarreforma do Estado em curso, articulados na defesa do Sistema Único de Saúde (SUS público, de qualidade e contra todas as formas de privatização da saúde. Este estudo apreende as proposições dos intelectuais coletivos que integram efetivamente o Fórum em Defesa do SUS de Campina Grande. Para tanto, identifica as propostas desses intelectuais no processo de contrarreforma da saúde em curso, na perspectiva do consenso ou da resistência, tendo como referência a Reforma Sanitária Brasileira formulada nos anos de 1980.

  8. A síntese imperfeita: articulação entre política externa e política de defesa na era Cardoso

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    João Paulo Soares Alsina Jr.

    2003-12-01

    Full Text Available Esse artigo tem por objetivo gerar hipóteses sobre a articulação entre política externa e política de defesa na gestão Cardoso. Partiu-se de estudo de caso sobre a formulação da Política de Defesa Nacional (PDN e as conseqüências dessa para a institucionalização do Ministério da Defesa (MD. Constatou-se a baixa prioridade atribuída pela diplomacia ao poder militar como ferramenta de política externa. Finalmente, explicitou-se a inexistência de mecanismos efetivos de articulação.This article has the objective of producing hypotheses on the articulation between foreign and defense policies during President's Cardoso administration. Initially, a case study on the formulation of the National Defense Policy Document (PDN and its consequences to the institutionalization of the Defense Ministry (MD was conducted. The low priority Brazilian diplomacy attributes to military power as a foreign policy tool was established. Finally, the lack of effective articulation mechanisms between foreign and defense policies was stressed.

  9. Em defesa dos direitos da criança no ambiente hospitalar: o exercício da advocacia em saúde pelos enfermeiros

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    Bruna Ruoso da Silva Neutzling

    Full Text Available Resumo Objetivo: Conhecer as ações dos enfermeiros na defesa dos direitos das crianças hospitalizadas. Métodos: Pesquisa qualitativa, desenvolvida em duas instituições hospitalares do Sul do Brasil, com 12 enfermeiros, - por meio de entrevistas semiestruturadas, em junho de 2014. Resultados: Foi possível perceber que os enfermeiros exercem a defesa dos direitos das crianças hospitalizadas através de ações que visam garantir o direito à vida, à dignidade e à saúde. Conclusões: As ações dos enfermeiros na defesa dos direitos das crianças hospitalizadas, foram realizadas, principalmente, por meio de orientações que possibilitam a participação da criança nos seus cuidados e a promoção da autonomia dos pais ou responsáveis para a tomada de decisões quanto aos cuidados com a saúde da criança. Implicações para a prática: O reconhecimento das ações de advocacia em saúde constitui um avanço para a prática da enfermagem, pois oportuniza aos enfermeiros subsídios para o enfrentamento de futuras vivências no contexto pediátrico.

  10. Kant em defesa da alimentação saudável [Kant in defense of healthy food

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    Sônia Soares

    2016-09-01

    Full Text Available O direito humano à alimentação adequada (DHAA foi consagrado na Carta Magna brasileira, reconhecendo na dignidade da pessoa humana o seu fundamento. Admitindo esta garantia jurídica como pré-condição para uma reflexão ética, defendo neste artigo a necessidade de utilizar a doutrina kantiana dos deveres e do cuidado de si para fundamentar a escolha de uma alimentação saudável como um dever de virtude, para o que será necessário estabelecer a dimensão moral da alimentação no âmbito da filosofia de Kant. O objetivo é mostrar a aplicação da filosofia prática de Kant na elaboração de uma nova abordagem dos problemas alimentares atuais. Minha defesa deve ser vista como complemento ao argumento da utilidade do alimento em geral presente nas políticas e programas públicos voltados para a alimentação, nutrição e segurança alimentar, que destacam os benefícios pessoais e coletivos obtidos a partir da escolha de uma alimentação saudável.

  11. Chemical modeling of formation water of the active Luna, Tabasco; Modelacion quimica de aguas de formacion del activo Luna, Tabasco

    Energy Technology Data Exchange (ETDEWEB)

    Barragan R, Rosa M; Portugal M, Enrique; Arellano G, Victor M. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Martinez A, Ana E; Ascencio C, Fernando [Petroleos Mexicanos (Mexico)

    2001-07-01

    From the data of chemical composition of the water, the chemical equilibrium at a given temperature can be modeled for, later, obtain the saturation indexes of characteristic minerals with the intention of knowing or predict which phases can form the deposits. The Gerencia de Productividad de Pozos (GPP) of the Subdivision of Technology and Professional Development (STDP) of PEMEX, has among its objectives to promote studies tending to solve problematic that affect the wells productivity, reason why it showed interest in making a study of chemical modeling of formation waters of the Active Luna, in order to know the saturation state of the main mineral phases. This way a joint project was executed in 1997 among the GPP, the Active of Production Luna of PEMEX and the Gerencia de Geotermia of the IIE. The objectives of the project were: (a) sampling and physicochemical characterization of waters pertaining to oil wells of the Actives of Production Luna, and (b) modeling of the chemical equilibrium at well head and deposit conditions to obtain saturation indexes of characteristic minerals of hydrothermal systems, in order to predict the mineral phases that can be found in superficial and deep incrustations. [Spanish] A partir de los datos de composicion quimica del agua, pude modelarse el equilibrio quimico a una temperatura dada para, posteriormente, obtener los indices de saturacion de los minerales caracteristicos con el objeto de conocer o predecir cuales fases pueden formar los depositos. La Gerencia de Productividad de Pozos (GPP) de la Subdireccion de Tecnologia y Desarrollo Profesional (STDP) de Pemex, tiene entre sus objetivos promover estudios tendientes a resolver problematicas que impactan la productividad de los pozos, por lo que mostro interes en realizar un estudio de modelacion quimica de las aguas de formacion del Activo Luna, con el proposito de conocer el estado de saturacion de las principales fases minerales. De esta forma se realizo un proyecto

  12. Comprension de los conceptos de los enlaces ionico y covalente en estudiantes universitarios del primer curso de quimica general

    Science.gov (United States)

    Ballesteros Benavides, Maria Elvira

    Para este trabajo utilizamos el estudio de casos cualitativo que se llevo a cabo en una universidad privada de Puerto Rico. Empleamos como unidad de analisis el concepto de enlace quimico, ionico y covalente. Los participantes fueron los estudiantes de la seccion nocturna del curso de Quimica General I. La investigacion se desarrollo por medio de dos entrevistas de persona a persona, observaciones de las expresiones no verbales y la hoja de identificacion de conceptos. Para la triangulacion tomamos en consideracion las preconcepciones erroneas, las concepciones alternativas y el mapa de conceptos de cada participante. Preparamos un mapa de conceptos para el enlace quimico validado por un comite de expertos. Tambien, elaboramos los mapas de conceptos de los participantes que sirvieron para varios propositos: conocer la estructura conceptual, expresar los logros, hacer comparaciones e identificar la presencia de concepciones alternativas. Entre los hallazgos encontramos que todos los participantes poseen conocimiento previo de los enlaces quimicos ionico y covalente y dentro de ese conocimiento existen preconcepciones erroneas mas numerosas para el enlace ionico. Al principio del semestre el 50% de los participantes demostraron tener "carencia fuerte de conceptos" tanto para el enlace ionico como para el covalente. Al finalizar el semestre encontramos en el 40% de los participantes concepciones alternativas tanto para el enlace ionico como para el covalente y el 90% no lograron distinguir un enlace del otro. Nuestras conclusiones fueron que los participantes sin distincion del aprovechamiento academico demostraron tener la tendencia de "carencia fuerte de conceptos" tanto para el enlace ionico como para el covalente, presentaron dificultad al integrar los conceptos de los enlaces quimicos ionico y covalente que se pusieron de manifiesto al dar los ejemplos. Las preconcepciones erroneas contribuyen en el desarrollo de las concepciones alternativas. Ademas, los

  13. Instrumentos de planejamento e preparo dos municípios brasileiros à Política de Proteção e Defesa Civil

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    Marcos Pellegrini Coutinho

    2015-09-01

    Full Text Available Com a premissa de que as cidades devem possuir um plano diretor e leis capazes de inibir ocupação em áreas de risco, buscamos conhecer o nível de preparo dos municípios brasileiros no contexto da Política Nacional de Proteção e Defesa Civil (PNPDEC, segundo a Lei n. 12.608/2012, que altera o Estatuto da Cidade e a Lei de Lehmann. A pesquisa utilizou os dados do MUNIC/IBGE/2013, que disponibiliza informações dos municípios. Constatamos que poucos municípios incorporaram as mudanças trazidas pela PNPDEC, inclusive municípios com áreas de risco mapeadas e monitoradas pelos órgãos competentes. Sugerimos uma dedicação especial dos setores de planejamento, obras e infraestrutura, defesa civil, ambiental, saúde, entre outros, para que os instrumentos normativos sejam utilizados no planejamento das cidades, conforme critérios técnicos e fragilidades ambientais. A capacitação técnica e da população também é essencial para uma ocupação ordenada dos espaços (público e privado e para a construção de cidades resilientes.

  14. Caminhos para uma análise discursiva da voz na defesa do tribunal do júri: o excesso, a falta, o estranhamento

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    Clóris Freire Dorow

    2017-11-01

    Full Text Available O referido artigo discute a questão da falta, do excesso e do estranhamento, tendo como materialidade discursiva o discurso jurídico da defesa em um tribunal do júri. A vertente teórica, que embasa esta discussão, é a Análise de Discurso francesa. No discurso jurídico escolhido, observou-se uma argumentação bastante puderam-se observar dois aspectos que sobressaem na argumentação: as formações imaginárias que tentam prever quem é o interlocutor e os esquecimentos número um e número dois que propiciam a ilusão de que o sujeito articula seu discurso de forma criativa e única, sendo que a grande meta do sujeito discursivo da defesa é destruir a argumentação de seu opositor. A partir dessas constatações, procurou-se então partir para a análise, e na escolha do corpus, foi essencial o aporte teórico trazido pelos aspectos abordados por Ernst, que constituem percursos eivados de perspectivas para o analista de discurso.

  15. A crise ucraniana e as Estratégias Nacionais de Defesa dos EUA e da Europa: a volta do hard power?

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    João Fábio Bertonha

    2014-11-01

    Full Text Available O presente artigo discute a recente crise na Ucrânia e as implicações em termos estratégicos do choque entre a OTAN, a União Europeia e a Rússia. Mais especificadamente, o texto procura compreender o uso do hard power por parte da Federação russa e como isso pode levar a uma reavaliação da postura idealista da União Europeia no tocante a suas relações internacionais e de sua Estratégia de Defesa. Do mesmo modo, o texto questiona a possibilidade e/ou necessidade de alterações na Estratégia de Defesa nos EUA frente à crise no leste europeu. This article discusses the recent crisis in Ukraine and the strategic implications of the clash between NATO, the European Union and Russia. More specifically, the text seeks to understand the use of the hard power by the Russian Federation during the crisis and how this use can lead to a reassessment of European idealistic approach of international relations and military matters. At the same time, the article discusses the possibility and/or necessity of changes in American military strategies to deal with future problems in Eastern Europe.

  16. Dissuasão, redução de armas nucleares e defesas antimísseis nos governos Bush e Obama

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    Diego Santos Vieira de Jesus

    2013-12-01

    Full Text Available O objetivo é analisar as perspectivas das administrações de George W. Bush e Barack Obama com relação à dissuasão, à redução de armas nucleares e às defesas antimísseis. Sustenta-se que ambas as administrações reafirmaram o papel fundamental das armas nucleares para a dissuasão, comprometeram-se com a redução de armas nucleares acompanhada de iniciativas para modernização e reconheceram a importância de defesas antimísseis na proteção dos EUA e de aliados. Tais perspectivas estão relacionadas à necessidade contínua de ampliar a flexibilidade para lidar com ameaças contemporâneas e à manutenção de opções diversificadas para o enfrentamento desses desafios.

  17. Bases para la elaboracion de unidades didacticas de calidad en el area de ciencias (Fisica y Quimica 3 deg ESO)

    Science.gov (United States)

    Maccioni, Elena Lucia

    Este Trabajo Fin de Master tiene como objeto, el estudio previo de la educacion de la ciencia en la actualidad y mas destacable, del diseno de las unidades didacticas segun las metodologias mas frecuentes aplicadas por los diferentes sistemas educativos en el area de las Ciencias teniendo en cuenta la importancia y el efecto de la psicologia del alumnado y todo ello como no puede ser de otro modo bajo el corse de la Legislacion aplicable, Estatal, Autonomica y europea. Con estos antecedentes, se extrae cuales son las preguntas que deben contestarse en la elaboracion de una unidad didactica de calidad en el contexto, generacional (edad y sexo), del Proyecto Educativo de Centro, y de la Programacion del Departamento, discutiendo y justificando cada uno de los apartados en que estructuradamente dividiremos dicha Unidad, con un formato manejable, util, y dinamico en el tiempo que sea un verdadero instrumento educativo de aula. Teniendo en cuenta estas premisas, se procede a hacer una recopilacion de una misma unidad didactica publicada por diferentes editoriales, elegidas no al azar, sino en funcion de su penetracion editorial en nuestros centros de ESO, siendo las elegidas (SM y Oxford). Las diferentes unidades seleccionadas son analizadas de forma critica, atendiendo a los criterios generales de calidad bajo parametros cientificos y normativos, concluyendo con la aportacion final que es la redaccion de unas pautas cientifico-pedagogicas, para redactar unidades didacticas de calidad en el area de la Ciencias, en concreto en la Asignatura de Fisica y Quimica de 3º de ESO.

  18. Desastres, ordem social e planejamento em defesa civil: o contexto brasileiro Disasters, social order and civil defense planning: the Brazilian context

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    Norma Valencio

    2010-12-01

    Full Text Available A pesquisa sociológica em desastres tem muitas abordagens voltadas para as instituições e relações de poder. Desastres têm implicações sobre a ordem social, bem como a ordem social pode colaborar para a produção do desastre. As rupturas sociais provenientes de situações de desigualdade têm influência na resposta dos eventos de desastre, incluindo fatores políticos e econômicos que aumentam a vulnerabilidade. Este artigo analisa o discurso institucional e as práticas de defesa civil no contexto brasileiro. Antes de tudo, descreve as principais abordagens da sociologia dos desastres: o consenso mínimo, a polaridade e dicotomia, e mostra uma abordagem sobre a relação entre desenvolvimento desigual, vulnerabilidade e planejamento de defesa civil. A situação atual nas cidades brasileiras é de restrição de acesso a terra e isso resulta em aumento dos desastres. Se não ocorrer mudança no planejamento do Estado, com a adoção de novas estratégias explicitamente formuladas para quebrar o ponto de vista ideológico que submete grupos pobres, os desastres continuarão acontecendo. Na atual dimensão estrutural do planejamento, o sistema brasileiro de defesa civil classifica os grupos vulneráveis sem considerar a complexidade social. Desastres não destroem por completo os sistemas sociais existentes, mas são capazes de manter contínuos processos de indiferença social. Assim, este artigo conclui dando ênfase no desenvolvimento de uma agenda participativa no planejamento e no nível decisório em defesa civil.Sociological research on disasters has many approaches targeted at institutions and power relationships. Disasters have implications on the social order, and the social order can collaborate to produce disasters. The social disruption deriving from inequality situations influences the response to disaster events, including political and economic factors that increase vulnerability. This paper analyzes the institutional

  19. Priming previne a insuficiência renal aguda nefrotóxica através da estimulação do mecanismo de defesa antioxidante

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    Fernanda Duarte

    2016-06-01

    Full Text Available RESUMO Introdução: Priming é um mecanismo de proteção induzida pela exposição anterior de uma célula ou órgão a baixas ou mesmas concentrações de uma substância tóxica. Objetivo: analisar o mecanismo de priming induzido pela exposição a gentamicina em células tubulares proximais humanas e na insuficiência renal aguda (IRA. Métodos: Células tubulares foram expostos a 2 mM de gentamicina durante 24 horas, enquanto ratos Wistar foram expostas a 40 mg/kg durante 3 dias. Depois de uma semana, as células foram expostas à mesma concentração durante 24h e os ratos durante dez dias. Os animais condicionados foram comparados com ratos controle e tratados com gentamicina durante 10 dias. Foram analisados parâmetros bioquímicos, o estresse oxidativo foi analisado por hidroperóxidos e proteínas carboniladas urinárias, enquanto a defesa antioxidante foi estudada pela atividade antioxidante do plasma e imunomarcação e atividade da catalase, superóxido dismutase, heme oxigenase-1 (HO-1 nos rins. Necrose, apoptose, proliferação e expressão da endotelina-1 (ET-1 e HO-1 foram estudadas em células. Resultados: o condicionamento dos animais inibiu o aumento da creatinina, ureia, excreção urinária de sódio e de proteína induzida por gentamicina. Bosentana, antagonista do receptor ET-1, e hemin, indutor de HO-1, potencializaram a inibição. O mecanismo de proteção foi mediado pela indução de enzimas antioxidantes HO-1, catalase e SOD atividade e redução do estresse oxidativo. O condicionamento inibiu a morte celular e induziu a proliferação via produção de ET-1. Conclusão: o mecanismo de condicionamento é persistente e multifactorial, o estímulo da defesa antioxidante poderia mimetizar o processo de condicionamento e impedir a IRA.

  20. Reflexões sobre o processo histórico-discursivo do uso da legítima defesa da honra no Brasil e a construção das mulheres

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    Margarita Danielle Ramos

    2012-05-01

    Full Text Available http://dx.doi.org/10.1590/S0104-026X2012000100004 O presente artigo busca compreender, à luz da teoria de gênero, como, ainda hoje, nos julgamentos de assassinatos de mulheres a prerrogativa da legítima defesa da honra tem sido usada na defesa do réu como tentativa de reversão da pena de homicídio qualificado. Para tanto, fizemos um estudo dos códigos da legislação vigente no Brasil relacionados ao tema de nosso trabalho desde o período colonial até os dias de hoje. O trabalho procura mostrar como o assassinato das mulheres é o final de uma rede de violações contra elas que tem seu início na forma como as mulheres são produzidas pelo discurso.

  1. A revitalização da indústria de defesa brasileira: análise da alternativa Cooperação Sul-americana/européia

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    Renato Peixota Dagnino

    2010-05-01

    Full Text Available No Brasil, assiste-se a formação de uma policy network que busca a revitalização da indústria de defesa. O foco do presente trabalho é analisar uma alternativa em discussão no interior dessa rede para revitalizar tal indústria por meio de uma cooperação entre os países sul-americanos e europeus. Apesar da informação sobre o setor ser escassa e controversa, foi possível realizar uma análise dos atores envolvidos, dos mercados, capacidades produtivas, dos principais benefícios e ameaças que apresenta essa cooperação. O artigo sinaliza a necessidade de melhor avaliar esses potenciais benefícios e os impactos de uma revitalização da indústria de defesa nacional.

  2. Os princípios do contraditório e da ampla defesa como instrumentos históricos garantidores da eficácia e legitimidade do processo administrativo disciplinar

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    Yduan de Oliveira May

    2015-12-01

    Full Text Available O presente artigo analisa o processo administrativo disciplinar como garantia constitucional para acusados de infrações disciplinares. Em um primeiro momento trata-se de aspectos históricos. Posteriormente, faz breve apreciação sob a Teoria Garantista de Ferrajoli. Por fim, conclui-se que o Processo Administrativo Disciplinar deve ser um instrumento garantidor do contraditório e da ampla defesa, para sua legitimidade e eficácia.

  3. Entre estupros e convenções narrativas: os Cartórios Policiais e seus papéis numa Delegacia de Defesa da Mulher (DDM

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    Larissa Nadai

    Full Text Available Resumo Este artigo tem por objetivo colocar em evidência as convenções narrativas que constituem os documentos oficiais produzidos pela Delegacia de Defesa da Mulher (DDM de Campinas, em casos de estupro e ato libidinoso, entre os anos de 2004 e 2005. Levando em consideração, a “gramática” e os “léxicos” produzidos pela polícia civil, gostaria de refletir sobre as inflexões narrativas que são postas em prática por essa corporação quando escrivãs e delegadas, por meio de seu trabalho rotineiro de escrita, forjam termos, produzem encadeamentos narrativos, sequências e imagens textuais. Tomando como cenário a espacialidade e os barulhos e silêncios impostos aos expedientes de trabalho dessa repartição policial, busco, também, colocar em evidência as expertises, estratégias e táticas mobilizadas por essas profissionais diante dos dilemas cotidianos de escuta/escrita enfrentados.

  4. Em defesa da sociedade: a invenção dos cuidados paliativos e a produção de subjetividades

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    Karen Schein da Silva

    2012-04-01

    Full Text Available O artigo é uma reflexão teórica que faz parte de um estudo denominado Em Defesa da Sociedade: a invenção dos Cuidados Paliativos. Para articular tal discussão, utilizamos o manual de Cuidados Paliativos, publicado no ano de 2007 pela Organização Mundial da Saúde (OMS, entendendo-o como parte de um artefato capaz de produzir subjetividades e governar condutas. Nesse sentido, pretendemos descobrir como os discursos sobre os Cuidados Paliativos se articulam e efetuam a invenção de uma nova disciplina que funcionaria como uma estratégia biopolítica para defender a sociedade. A partir da análise textual do discurso instituído pelo manual, com o auxílio do referencial dos Estudos Culturais e sob a inspiração dos escritos de Michel Foucault, articulamos uma das possíveis leituras deste guia. Desta maneira observamos a (reorganização e a (reinvenção de uma disciplina que investe na subjetividade dos indivíduos constituindo aparatos de verdade que regulam e governam a população.

  5. GESTÃO DO CONHECIMENTO NAS RESPOSTAS A DESASTRES NATURAIS: A EXPERIÊNCIA DA DEFESA CIVIL DO ESTADO DE SANTA CATARINA

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    Daniel Cardoso

    2014-12-01

    Full Text Available O presente trabalho tem como objetivo apresentar a importância da gestão do conhecimento nas ações de resposta a desastres naturais, uma vez que tais situações normalmente se caracterizam pela necessidade da adoção de medidas emergenciais, ao passo que o acesso a dados ou informações para a tomada de decisões torna-se difícil ou mais restrito. Utiliza-se como metodologia a pesquisa de campo, exploratória, qualitativa, baseada na análise documental e em entrevista não estruturada com representante da Defesa Civil do Estado de Santa Catarina como técnica de levantamento de dados. Como resultado, tem-se que a gestão do conhecimento é fundamental para garantir o fluxo adequado de conhecimento entre os grupos envolvidos em um desastre natural, de forma a aumentar a eficiência das ações voltadas a apoiar as possíveis vítimas ou minimizar os eventuais impactos naturais. Em suma, verifica-se a relevância de uma adequada preparação e planejamento das autoridades envolvidas em situações de emergência para uma efetiva ação de resposta, e para isso, faz-se necessário prever alternativas e métodos para o acesso a dados e trocas de informações que sejam eficientes para a mitigação dos riscos e controle das consequências geradas pelo desastre.

  6. Em defesa da vida: : modelo do Sistema Único de Saúde de Volta Redonda In defese of life: a SUS model in Volta Redonda, Brazil

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    Roseni Pinheiro

    2001-12-01

    Full Text Available A reforma do sistema de saúde brasileiro é um dos mais bem-sucedidos exemplos de descentralização institucional, a despeito de ser uma experiência que contém limites. Esses limites estão relacionados com a natureza das instituições responsáveis pela prestação dos serviços, e pelas demandas apresentadas pela população. Na Constituição de 1998 que deu forte ênfase à democratização das relações políticas, ocorreu a incorporação da saúde enquanto direito de cidadania, através do qual foram fixados atributos para o Estado, de modo a definir um outro patamar em seu relacionamento com a sociedade. O direito à saúde conduziu a uma centralidade nas questões relativas ao acesso aos serviços de saúde. Assim, produziu-se um reordenamento político e institucional do aparato estatal, orientado para potencializar a ação dos municípios, pois essa era a esfera de governo que caberia ampliar a oferta local de serviços básicos de saúde. Neste sentido, o direito à saúde torna-se direito universal a serviços locais de atenção à saúde. O presente estudo é uma investigação exploratória sobre a relação da demanda e oferta, na perspectiva da prática quotiadiana dos diversos atores. Essa relação foi examinada através de um estudo de um caso concreto, de reforma do sistema de saúde do município de Volta Redonda, o qui se desenvolveu um modelo de SUS denominado "Em Defesa da Vida", que é a base dessa investigação. A experiência de Volta Redonda revelou que nesse município os preceitos institucionais do SUS - universalidade, integralidade, descentralização e participação social - foram plenamente incorporados, em paralelo à adoação de inciativas inovadoras de reorganização das práticas em saúde e medicina, tais como: o Programa Saúde da Família e a medicina homepática. Esse êxito, no entanto foi limitado pela presença de variáveis relacionadas não somente ao campo biomédico, mas também aos

  7. A PERPETUAÇÃO DA TESE “LEGÍTIMA DEFESA DA HONRA” EM CASOS DE VIOLÊNCIA CONTRA MULHER NO ESTADO DE SÃO PAULO

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    Raphael Allan de Oliveira Soares

    2017-05-01

    Full Text Available O artigo tem por objetivo caracterizar a tese “legítima defesa da honra” utilizada em casos de violência contra a mulher, verificar como tal tese tem aparecido nos tribunais do Estado de São Paulo, e principalmente verificar como o Poder Judiciário estadual tem lidado com uma tese enraizada no machismo. Baseando-se em pesquisa literária e pesquisa de jurisprudências no site do Tribunal de Justiça de São Paulo, conclui-se que tal argumento ainda hoje se faz presente nos tribunais paulistas, e que em poucos casos o judiciário se mostra tão machista quanto a tese apresentada pela defesa. Tal conclusão pode nos mostrar o caráter machista, ainda que em declínio, do Tribunal de Justiça do Estado de São Paulo.

  8. Development of a technical scheme for the management of chemical dangerous substances in hospitable environments; Desarrollo de un esquema tecnico para la gestion de sustancias quimicas peligrosas en ambientes hospitalarios

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    Calleja Amador, C E

    2002-07-01

    The chemical substances that are used in the hospitals, and their remainders, represent risks for the environment, the health and security of those who work in these establishments, and of the civil population. The deficiency of a norm that establishes the directives for the handling responsible for such products in the hospitals that our country has motivated the elaboration of a technical scheme that serves as it guides for the correct manipulation, storage and safe disposition of chemical substances in the twenty-nine hospitals of the Caja Costarricense del Seguro Social, establishing Procedures of Standard Operation for its management. To development of the guideline proposal it took a sample of hospitals that includes three levels of comple complexity: national, regional and peripheral. Applying a methodology of evaluation of risks two factors of risk of hospitable were determined, the zones and the population but affected by the existence of chemical substances, which allowed to identify some operative deficiencies in the product handling diverse. The qualitative analysis of the results lead to the elaboration of a technical scheme that includes an instrument for the identification of risks, guideline for the management responsible for hospitable chemical substances, a friendly tool computations like complementary source of intelligence and the proposal of a governing group in charge of the monitoring of the fulfillment of these lineament. (Author) [Spanish] Las sustancias quimicas que se usan en los hospitales, y sus residuos, representan riesgos para el medio ambiente, para la salud y seguridad de quienes trabajan en estos establecimientos, y de la poblacion civil. La carencia de una normativa que establezca las directrices para el manejo responsable de tales productos en los hospitales de nuestro pais ha motivado la elaboracion de un esquema tecnico que sirva como guia para la correcta manipulacion, almacenamiento y disposicion segura de sustancias

  9. Mecanismos bioquímicos da defesa do algodoeiro à mancha de ramulária mediados pelo silício

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    Carmen Rosa da Silva Curvêlo

    2013-03-01

    Full Text Available Esse estudo investigou o efeito do silício (Si na resistência do algodoeiro à mancha de ramulária (Ramularia areola. Plantas de algodoeiro (cvs. NuOpal e BRS Buriti foram cultivadas em solução nutritiva nas concentrações de 0 (-Si e 2 mM Si L-1 (+Si e aos 30 dias após emergência foram submetidas à inoculação com uma suspensão de conídios de R. areola. Avaliou-se o período de incubação (PI, o período latente (PL60, a severidade, o número de lesões (NL por cm² de folha, o tamanho de lesão (TL, a concentração foliar de Si e as atividades das enzimas de defesa peroxidases (POX, polifenoloxidases (PFO, quitinases (QUI, β-1,3-glucanases (GLU e fenilalanina amônia-liases (FAL. Os dados de severidade foram usados para calcular a área abaixo da curva do progresso da mancha de ramulária (AACPMR. A concentração foliar de Si aumentou em 64% nas plantas supridas com Si em relação às não supridas com esse elemento. Houve aumentos de 10% e 14,7%, respectivamente, para o PI e o PL60 nas plantas supridas com Si. Reduções de 38,6% e 62,4% para o NL e de 17,2% e 26,6% para o TL ocorrem, respectivamente, nas plantas das cvs. NuOpal e BRS Buriti supridas com Si. Houve redução de 35% na AACPMR para as plantas supridas com Si em relação às não supridas. A concentração de compostos fenólicos solúveis totais nas plantas das duas cultivares supridas com Si foi maior aos 21 dias após inoculação (dai em relação às não supridas com esse elemento. A concentração dos derivados da lignina foi maior dos 15 aos 21 dai apenas para as plantas da cv. BRS Buriti supridas com Si. A atividade da POX foi maior nas plantas das duas cultivares supridas com Si em relação às não supridas com esse elemento dos 15 aos 21 dai. Paras as plantas da cv. NuOpal supridas com Si, as atividades da PFO, QUI, GLU e FAL aumentaram aos 18 dai. As atividades da PFO e da FAL nas plantas da cv. BRS Buriti não foram potencializadas pelo Si. Nas

  10. A revisão contratual por excessiva onerosidade superveniente à contratação positivada no Código de Defesa do Consumidor sob a perspectiva civil-constitucional

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    Fabiana Rodrigues Barletta

    2015-07-01

    Full Text Available A fim de compreender a interpretação civil – constitucional dasegunda parte do artigo 62, inciso V do CDC – que considera a excessivaonerosidade por motivos supervenientes à contratação motivo suficientepara revisar um contrato de consumo – constituiu-se um arcabouço teóricoe metodológico para alcançar este objetivo. Assim, tratou-se da Constitui-ção da República brasileira como um sistema unitário, afastando tambéma clássica dicotomia entre Direito Público e Privado. Após confrontar asinovações trazidas pelo Código de Defesa do Consumidor com o CódigoCivil de 1916, constatou-se que a “vontade” do consumidor não se manifestaplenamente em contratos de consumo que são, em sua grande maioria, deadesão. Nesse sentido, o trabalho propõe uma visão objetivada do contratopossibilitando uma interpretação menos carregada de “voluntarismos” e“subjetivismo” e mais voltada para a sua finalidade social e também paraas expectativas que as partes contratantes depositaram nele. As principaisteorias desenvolvidas em torno da teoria da imprevisão também estão con-tidas neste trabalho que analisa as concepções de Windocheid e Karl Larenzpara, ao final, entender que o código brasileiros de Defesa do Consumidor,embora recebendo influência de ambas, não acolhe nenhuma delas poisdispõe, pioneiramente, sobre a teoria da necessidade excessiva que dispensao requisito da imprevisibilidade para rever o conteúdo de um contrato que,ao longo do tempo, se tornou excessivamente oneroso.

  11. Núcleo de estudos e defesa de direitos da infância e da juventude (NEDDIJ: amparo à proteção integral da criança e do adolescente

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    Amália Regina Donegá

    2014-04-01

    Full Text Available http://dx.doi.org/10.5007/1807-0221.2013v10n16p50 O Núcleo de Estudos e Defesa de Direitos da Infância e da Juventude (NEDDIJ é fruto do convênio celebrado entre a Universidade Estadual de Maringá(UEM e a Secretaria de Estado da Ciência, Tecnologia e Ensino Superior (SETI. Seu objetivo é consolidar uma estratégia de atendimento, defesa e garantia dos direitos individuais e coletivos das crianças e dos adolescentes economicamente hipossuficientes, residentes na Comarca de Maringá-PR, que se encontrem em situação de risco, ou tenham seus direitos violados ou ameaçados de serem violados, assim como daquele a quem se atribua a prática de atos infracionais. Prezamos pela metodologia do trabalho interdisciplinar, prestando assistências jurídica e psicológica gratuitas. Por meio de ações intramuros e extramuros diversas, como palestras, conferências e pesquisas, o NEDDIJ busca socializar o conhecimento acadêmico para efetivar a tutela dos direitos da criança e do adolescente, bem como sensibilizar seus integrantes para o acolhimento e a humanização no atendimento ao público, integrando universidade e comunidade em um objetivo comum. Assim, suas ações permitem a descoberta de novos caminhos para o tratamento das questões que envolvam os direitos infanto-juvenis, permitindo a sua efetivação, bem como oferecem condições de acesso à Justiça nas situações em que se necessita de tutela judicial. A assistência jurídica prestada engloba ações socioeducativas, de guarda, adoção e tutela. A assistência psicológica compreende escuta e acolhimento, aconselhamento, pareceres e atendimentos. O NEDDIJ constitui-se, portanto, em instrumento contributivo no plano das políticas públicas para a infância e a juventude.

  12. A Política Científica e Tecnológica de Santa Catarina: análise a partir do modelo de coalizões de defesa

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    Luiz Ricardo de Souza

    2014-08-01

    Full Text Available Este artigo utiliza o modelo de coalizões de defesa (Advocacy Coalition Framework - ACF, de Sabatier e Jenkins-Smith (1993, para analisar a prevalência da comunidade científica catarinense como ator-chave na formulação da Política Científica e Tecnológica (PCT de Santa Catarina. A coleta de dados foi realizada a partir de relatórios e documentos oficiais das instituições, bem como de entrevistas realizadas com 10 atores do processo de formulação da PCT que ocuparam funções estratégicas no período de 1989 a 2009, assim classificados: 1 comunidade científica; 2 burocratas; 3 designados politicamente; 4 empresários; 5 políticos. A análise dos dados teve como conceitos sensíveis aqueles presentes no modelo de coalizões de defesa: a o papel dos atores; b sistemas de convicções e recursos; c trajetórias da política pública; d características da política pública; e conteúdo da política pública. Foram identificadas as conexões entre os atores, suas convicções, estratégias, recursos e constrangimentos. A pesquisa conclui que a comunidade científica exerce um papel de destaque na formulação da política científica e tecnológica catarinense, sendo prevalente na formulação da PCT em todo o período analisado. Em relação aos empresários, políticos e burocratas, não se identificou uma atuação destacada e contínua desses atores. Entretanto, os designados politicamente, que na maioria das vezes são recrutados no seio da comunidade científica, exerceram papel importante na formulação e na reafirmação do sistema de convicções da comunidade científica. Em relação às principais trajetórias que ajudam a explicar as mudanças da PCT catarinense no período analisado, a trajetória "aprendizagem orientada pela política pública" destaca-se perante as demais.

  13. Respostas ao adoecimento: mecanismos de defesa utilizados por mulheres com síndrome de Turner e variantes The defenses employed by women with Turner syndrome: dealing with the disease

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    Vera Lúcia Soares Chvatal

    2009-01-01

    Full Text Available OBJETIVO:Conhecer as defesas utilizadas por mulheres com síndrome de Turner (ST ou formas variantes para lidar com a doença. MÉTODO: Pesquisa qualitativa com desenho exploratório, não experimental. O instrumento consistiu em entrevista psicológica semidirigida, aplicada em 13 mulheres, cuja amostragem deu-se por saturação, as quais fazem acompanhamento semestral no Centro de Atendimento Integral à Saúde da Mulher. Os dados foram interpretados utilizando-se da abordagem psicodinâmica, aliada a um quadro eclético de referenciais teóricos para discussão no espírito da interdisciplinaridade. RESULTADOS: Essas mulheres apresentaram conflitos psicossociais como dificuldades de relacionamento interpessoal; sentimentos de resignação, raiva, impotência, desvalia e quadros de depressão. As defesas utilizadas foram: repressão, negação, anulação, fantasia, adaptação e sublimação. CONCLUSÕES:As mulheres com ST ou formas variantes têm de lidar com as intercorrências orgânicas e psíquicas da enfermidade provocando grande sofrimento que, frequentemente, dificultam uma inserção social mais sadia. Neste caso, os achados deste estudo poderão nortear acompanhamento psicológico ambulatorial concomitantemente ao protocolo clínico de rotina.OBJECTIVE:To understand the defenses employed by women suffering from Turner syndrome (TS and different ways of dealing with the disease. METHOD: Qualitative research with exploratory design, non-experimental. The instrument consisted of semi-conducted psychological interview, involving 13 women, undergoing semestral medical follow-up at the Women's Health Care Center, and whose sampling was determined by saturation. Data was interpreted using the psychodynamic approach along with an eclectic framework of theoretical references for discussion in the spirit of interdisciplinary approach. RESULTS:These women displayed psychosocial conflicts such as difficulties in interpersonal relationships

  14. Efeitos da temperatura e da defesa da presa no consumo pelo predador Supputius cincticeps (Stäl (Heteroptera:Pentatomidae Effects of temperature and of the prey defense on the consumption by the predator Supputius cincticeps (Stäl (Heteroptera:Pentatomidae

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    Francisco Roberto de Azevedo

    1999-02-01

    Full Text Available A pesquisa objetivou determinar se a temperatura e a defesa da presa afetam o consumo e a utilização de larvas de Tenebrio molitor L. por ninfas de Supputius cincticeps (Stäl. Quantificaram-se em cada um dos ínstares do predador Supputius cincticeps os consumos bruto e diário das larvas de T. molitor com e sem defesa, ganho de peso total e ganho de peso diário pelo predador. Foram determinados os efeitos da defesa da presa e da temperatura ambiente no consumo de alimento pelas ninfas de 2º, 3º, 4º e 5º ínstares de S. cincticeps. A pesquisa foi conduzida na Unidade de Controle Biológico da Embrapa-Centro Nacional de Pesquisa de Algodão, em Campina Grande, PB, a 20, 25, e 30ºC, 60±10% UR e fotofase de 14 horas. Os resultados mostraram que o consumo bruto de larvas de T. molitor pelo S. cincticeps depende do ínstar do predador e da temperatura, do ínstar do predador e da defesa da presa, e da temperatura e defesa da presa; o consumo diário de S. cincticeps depende do ínstar do predador e da temperatura, e do ínstar do predador e da defesa da presa, e o ganho de peso de S. cincticeps depende do seu ínstar, da temperatura e da defesa apresentada pelas larvas de T. molitor. O tamanho das larvas de T. molitor funciona como defesa ao ataque de S. cincticeps.The objective of the research was to determine if the temperature and pray defense affect the consumption and utilization of Tenebrio molitor L. larvae by nymphs of Supputius cincticeps (Stäl. The gross and daily consumptions of T. molitor larvae with and without defense by the predator Supputius cincticeps, and the gross and daily weight gains of the predator were quantified. Effects of the prey defense and temperature on the food consumption by the 2nd, 3rd, 4th and 5th instar nimphs of S. cincticeps were determined. The research was carried out in the Biological Control Unit of the Embrapa-Centro Nacional de Pesquisa de Algodão, at Campina Grande, PB, Brazil, at 20, 25, and

  15. “Cidadãos de bem” com armas: Representações sexuadas de violência armada, (insegurança e legítima defesa no Brasil

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    Rita Santos

    2013-02-01

    Full Text Available Este artigo procura examinar as estratégias discursivas utilizadas pelos movimentos a favor e contra o microdesarmamento no Brasil através da análise dos materiais de campanha das duas frentes no Referendo sobre a Proibição do Comércio de Armas de Fogo e Munições que teve lugar em outubro de 2005. A análise aponta para a utilização de representações e estratégias de mobilização do voto assentes em construções sexuadas das experiências e condutas de mulheres e de homens relativamente à probabilidade, lugares e protagonistas de vitimação armada, à conceção e ao exercício da legítima defesa enquanto direito do “cidadão de bem” e/ou privilégio. O estudo e a discussão destas representações são essenciais, uma vez que estas influenciam a forma como a violência e a (insegurança é imaginada e percebida e, em especial a forma como, por sua vez, condicionam as políticas de combate e prevenção da violência.

  16. Avaliação da ativação de defesa em soja contra Phakopsora pachyrhizi em condições controladas Evaluation of soybean defense activation against Phakopsora pachyrhizi in controlled conditions

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    Rosana Ceolin Meneghetti

    2010-08-01

    Full Text Available A efetividade da ativação de defesa em diferentes cultivares de soja contra Phakopsora pachyrhizi proporcionada pelo fosfito, bem como sua associação com fungicidas aplicados em diferentes épocas em relação à inoculação com o patógeno, foi estudada em condições de casa-de-vegetação em dois ensaios conduzidos no delineamento inteiramente casualizado, com quatro repetições. Os resultados obtidos indicaram que o fosfito não foi capaz de induzir a expressão dos mecansimos de defesa, uma vez que não foi observada qualquer redução na severidade, número de pústulas.cm-2, e na Área Abaixo da Curva de Progresso de Doença (AACPD, por conta da aplicação do produto. O progresso da ferrugem foi mais lento na cultivar Fundacep 55 RR, que teve uma AACPD 53% menor do que a cultivar Fundacep 56 RR, a mais suscetível. O fungicida epoxiconazol + piraclostrobina proporcionou uma redução na AACPD de 29%, quando comparado ao emprego do triazol isolado na média das épocas de aplicação. As aplicações mais próximas da inoculação e preventivas foram mais efetivas do que aquelas realizadas de forma muito precoce ou muito tardia em relação à infecção das plantas pelo patógeno. Os resultados indicaram que o fosfito não induziu resistência em soja contra P. pachyrhizi, e que houve variação na resistência parcial à ferrugem por parte das cultivares e na efetividade dos fungicidas entre si e quanto ao momento em que os mesmos são aplicados.The effectiveness of defense activation in different soybean cultivars against P. pachyrhizi promoted by phosphite, as well as its association with fungicides in different timing of application in relation to pathogen inoculation, was studied in greenhouse conditions in two assays carried out in completely randomized design, with four replications. The results shown that phosphite was unable to induce defense, because no reduction of severity, pustules.cm-2 number, and Area Under Progress

  17. A literatura de cárcere em defesa de um condenado à pena de morte no Japão – “Lágrimas da ignorância”, de Norio Nagayama

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    Lilian Yamamoto

    2016-02-01

    Full Text Available Apesar de o Japão da década de 1960 ter passado por uma fase de crescimento econômico acelerado, ainda restavam rincões de pobreza em várias regiões do país. Condenado à morte, Norio Nagayama, de origem humilde, é exemplo de criminoso influenciado por tal contexto. Nagayama foi autodidata no seu período de cárcere e logrou êxito na sua carreira literária, que culminou com o recebimento do prêmio japonês de Nova Literatura em 1983. Tendo sido preso após cometer quatro homicídios em 1968, seu caso constituiu um novo marco para o estabelecimento de critérios para a condenação à pena de morte no Japão. O presente artigo pretende analisar a influência da sua primeira obra, Muchi no Namida (Lágrimas da ignorância, 1971, na sua defesa apresentada nos tribunais. Essa obra é uma coletânea de seus cadernos de anotações de poesia e prosa com referência direta a eventos da sua infância e adolescência, a ideias sobre justiça social e, sobretudo, à sua viagem interna em busca da motivação de seus crimes. Assim, um exame sobre a persistência da pena de morte no sistema penal japonês se mostra de fundamental importância para maior entendimento do contexto em que o autor viveu.

  18. Trabalho infantil em Franca: um laboratório das lutas sociais em defesa da criança e do adolescente Child labour in Franca: a laboratory of the lute social in defensibility of the children and adolescents

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    Elisiane Sartori

    2006-06-01

    Full Text Available Este artigo propõe uma reflexão sobre o processo de conscientização e mobilização em torno do tema trabalho da criança, as lutas sociais no combate à sua eliminação e o processo de implementação de um dos programas mais atuantes na área - o IPEC (Programa Internacional de Eliminação do Trabalho Infantil. Através de um breve retrospecto histórico sobre a entrada do tema trabalho da criança na agenda nacional e internacional, descrevo a atuação dos atores sociais que fizeram parte da discussão e da criação de projetos e de programas de erradicação do trabalho infantil, discutindo a consolidação dos movimentos sociais em defesa das crianças e dos adolescentes. A análise das representações do trabalho infantil na família e no cotidiano das crianças e dos adolescentes está atravessada pela questão de gênero, observada nas falas das crianças e adolescentes, bem como de suas famílias.This paper proposes a reflection on the process of awareness gain and mobilization around the theme of child labor, the social struggles against the elimination of this practice, and the process of implementation of one of the most active programs in the area - the IPEC (International Programme on the Elimination of Child Labour. Through a brief retrospective history of the inclusion of the theme of child labor on both the national and international agendas, this work describes the performance of the social actors participating in the process of discussion and preparation of projects and programs for eradicating child labor. It also discusses the consolidation of the social movements engaged in defending (the rights of children and adolescents. The analysis of the representations of child labor inside the family and in the daily routine of both children and adolescents is permeated by the gender issue, which is verified in the words of children, adolescents, and their families.

  19. Uma tríade como defesa

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    Marco Antonio Maschio Cardozo Chaga

    2001-06-01

    Full Text Available Depois de reunir, organizar, indexar e interpretar o material publicado ao longo dos doze anos de existência do Folhetim (entre 1977-1989, percebo algumas lacunas que a minha análise do material carrega. Ao longo dos doze anos de existência do Folhetim, foram publicados 636 números com um pouco mais de cinco mil textos, além das gravuras, desenhos, fotos e histórias em quadrinhos. Justamente neste ponto surge uma das falhas mencionadas.

  20. Defesa dos direitos humanos: sistemas regionais

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    Hélio Bicudo

    2003-04-01

    Full Text Available O texto discorre sobre a institucionalização dos sistemas de promoção dos Direitos Humanos, ao longo do século XX. Tomando a Declaração Universal dos Direitos do Homem, de 1948, como base e ponto de partida, o articulista aborda as três principais vertentes dos sistemas de promoção desses direitos: a européia, a americana e a africana. A evolução de cada uma delas descrita analógica e epistemologicamente, de forma a salientar singularidades sem perder de vista as influências recíprocas ou mesmo as determinantes próprias do contexto espaço-social. Para finalizar, o articulista destaca a importância do Tribunal Penal Internacional no estabelecimento de uma justiça ecumênica. Concomitantemente, alerta para o perigo contido na ameaça de os EUA não o ratificarem.The text underlines the institutional character acquired by the main systems to promote Human Rights in the twentieth century. Taking the Universal Human Rigths Declaration, of 1948, as the basis for analysis, the author brings up three different approaches to promote these rights: the European, the American and the African. The evolution of each of them is described using its procedure as a basic reference. Besides, an analogical analysis, brings to the fore singularities, without ignoring reciprocal influences dictated by particular contexts, though. The author stresses the importance of the International Penal Court, as a means to establish ecumenical justice. At the same time, he reminds the reader of the risks implicit in the possible non-ratification of the IPC by United States.

  1. Variação de terpenos em Hyptis suaveolens e seu papel na defesa contra herbívoros The role of terpene variation in Hyptis suaveolens in the defense against herbivores

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    Rachel Benetti Queiroz-Voltan

    1995-01-01

    Full Text Available Acompanhou-se o desenvolvimento de populações de Hyptis suaveolens (L. Poit. (Labiatae em três localidades paulistas: Horto Florestal de Sumaré, Câmpus da UNICAMP (Campinas e Fazenda Santa Genebra (Distrito de Barão Geraldo, Campinas, em 1981-83. Em cada local, escolheu-se uma população exposta à luz e outra, à sombra, com o objetivo de verificar em que fase do ciclo de vida as populações se tornavam mais suscetíveis ao ataque de herbívoros; de estimar a abundância dos herbívoros naturais e seus efeitos nas populações e a conseqüência da variação química dos monoterpenos que nelas ocorrem sobre os herbívoros. As populações tornavam-se mais suscetíveis aos herbívoros no período que antecedia a floração. Não se observou forte ataque de herbívoros nessa fase, embora se apresentassem em maior densidade. Os resultados sugerem que a variação na composição química possa afetar o desenvolvimento de herbívoros generalistas. No entanto, o Pyrausta insignatalis Guenée (Lep.-Pyralidae-Pyraustinae, provavelmente bem adaptado à planta, parece não ter sido afetado por esses terpenos. Não se detectaram diferenças entre populações expostas ao sol ou à sombra. Tais resultados apóiam a idéia de que a variabilidade química dentro de populações vegetais é importante estratégia de defesa contra herbívoros, dificultando-lhes a especialização.Populations of Hyptis suaveolens (L. Poit. (Labiatae were accompanied during their development in three sites: Horto Florestal de Sumaré, Campus of UNICAMP (Campinas, and Fazenda Santa Genebra (Distrito de Barão Geraldo, Campinas, all in the State of São Paulo, Brazil, from 1981 through 1983. At each site, a population exposed to full sunlight and another in the shade were studied. The objective was to evaluate, during plant development, the period when they were more susceptible to attack by herbivores; to consider the abundance of herbivores, and the role of variation

  2. A crítica de Alexis Philonenko ao "mal-estar" sartriano: em defesa do humanismo The criticism of Alexis Philonenko to the sartrian's malaise: in defense of the humanism

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    Malcom G Rodrigues

    2010-01-01

    Full Text Available O objetivo do artigo é discutir a crítica de Philonenko (1981 aos conceitos sartrianos de "má-fé" e "liberdade". Um dos pilares dessa crítica é a defesa da noção de "coerência do estilo", elemento indispensável para resguardar a autenticidade tão prezada por Sartre, segundo Philonenko. Contudo, continua este último, ao afirmar "eu não sou jamais nenhuma de minhas condutas, nenhuma de minhas atitudes", Sartre limita a liberdade por ele defendida ao horizonte de uma maliciosa dissimulação, quer dizer, da má-fé. Nós constatamos três imprecisões nessa crítica. Em primeiro lugar, a citada afirmação de Sartre foi mal interpretada. Mas, em segundo, se essa interpretação está correta, supondo que o estilo seja indispensável à autenticidade, ainda assim a liberdade sartriana não pode ser "para o mal", pois ela se caracteriza, em termos ontológicos, como o próprio ser da realidade humana "em situação", e não em termos morais, como uma propriedade dessa realidade, cristalizada por um olhar atento sobre si ou sobre o outro, e julgada como boa ou má. Por fim, queremos concluir que, numa possível conduta autêntica, a derrocada da má-fé não apenas prescinde do amparo a uma coerência do estilo como também pressupõe o reconhecimento angustiante de sua gratuidade.The aim of this paper is to discuss the Philonenko's criticism (1981 to the sartrian's concepts of "bad-faith" and "freedom". One of the pillars of this criticism is to defend the notion of "coherence of style", an indispensable element to safeguard the authenticity so relevant for Sartre, according Philonenko. However, when Sartre says "I'm not ever any of my conduct, none of my actions", limits the freedom advocated by himself on the horizon of a malicious deception, that is, the horizon of bad- faith. We found three inaccuracies in this criticism. First, the statement aforementioned of Sartre was misinterpreted. But secondly, if this interpretation is correct

  3. Using the Defensive Style Questionnaire to evaluate the impact of sex reassignment surgery on defensive mechanisms in transsexual patients Aplicação do Defensive Style Questionnaire para avaliar o impacto da cirurgia de redesignação sexual nos mecanismos de defesa de pacientes transexuais

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    Maria Inês Lobato

    2009-12-01

    Full Text Available Objective: To evaluate the impact of sex reassignment surgery on the defense mechanisms of 32 transsexual patients at two different points in time using the Defensive Style Questionnaire. Method: The Defensive Style Questionnaire was applied to 32 patients upon their admission to the Gender Identity Disorder Program, and 12 months after they had undergone sex reassignment surgery. Results: There were changes in two defense mechanisms: anticipation and idealization. However, no significant differences were observed in terms of the mature, neurotic and immature categories. Discussion: One possible explanation for this result is the fact that the procedure does not resolve gender dysphoria, which is a core symptom in such patients. Another aspect is related to the early onset of the gender identity disorder, which determines a more regressive defensive structure in these patients. Conclusion: Sex reassignment surgery did not improve the defensive profile as measured by the Defensive Style Questionnaire.Objetivo: Avaliar o efeito da cirurgia de redesignação sexual nos mecanismos de defesa de 32 pacientes transexuais em dois momentos do estudo usando o Defensive Style Questionnaire. Método: O Defensive Style Questionnaire foi aplicado a 32 pacientes quando ingressaram no Programa de Transtorno de Identidade de Gênero e 12 meses após a cirurgia de redesignação sexual. Resultados: Houve modificações em dois mecanismos de defesa: antecipação e idealização; porém, sem mudanças significativas nos fatores maduro, neurótico e imaturo. Discussão: Uma possibilidade para esse resultado é o fato de a intervenção cirúrgica não resolver a disforia de gênero (principal sintoma desses pacientes. Outro aspecto está relacionado com o fato de o transtorno de identidade de gênero ser instalado precocemente, o que determina uma estrutura defensiva mais regressiva para esses pacientes. Conclusão: A cirurgia de redesignação sexual não foi

  4. Estudio de la estructura logica utilizada en la ensenanza y el aprendizaje de los conceptos sobre el comportamiento de gases en el curso introductorio de quimica a nivel universitario

    Science.gov (United States)

    Costa Diaz, Agnes

    El estudio que se presenta es de caracter cualitativo, un estudio multicasos donde se estudia la estructura logica utilizada por cuatro (4) profesores universitarios que ensenan el curso introductorio de quimica, en la planificacion, presentacion y evaluacion del tema sobre el comportamiento de los gases. Se utilizaron varias fuentes de informacion como: cuestionarios de profesores y estudiantes, entrevistas, grabaciones videomagnetofonicas, materiales didacticos y una prueba conceptual, entre otros. La informacion recopilada fue analizada de acuerdo al orden logico del contenido presentado, el estilo de ensenanza del profesor, las tecnicas y estrategias utilizadas para el desarrollo de destrezas de pensamiento, el ambiente fisico en el salon de clase y los instrumentos de evaluacion y avaluo. El estudio demuestra que lo que los profesores piensan y planifican para hacer sus presentaciones no necesariamente es lo que ocurre en el salon de clases. El desarrollo de destrezas de pensamiento, que constituye una prioridad de los profesores, no se elaboran efectivamente. El uso de las estrategias de resolucion de problemas numericos predomino. La participacion del estudiante en el salon de clases fue limitada y no se logro demostrar el desarrollo de las destrezas de pensamiento deseadas. Aunque los profesores tienen su propio estilo de ensenanza, el orden logico del contenido presentado en clase fue el mismo o siguio muy de cerca el orden establecido por el libro de texto. Los profesores utilizaron preferentemente la tiza y la pizarra para sus presentaciones y la dinamica en el salon de clases fue esencialmente tradicional. Los profesores hicieron su presentacion y los estudiantes copiaron pasivamente la informacion. Las evaluaciones de los estudiantes fueron esencialmente, pruebas escritas de seleccion multiple de acuerdo con el estilo en que se les enseno. El avaluo fue casi inexistente. La prueba conceptual administrada revela un aprendizaje pobre en los conceptos mas

  5. Reflexões sobre o processo histórico-discursivo do uso da legítima defesa da honra no Brasil e a construção das mulheres Reflections on the historical-discursive process of the use of the legitimate defence of honour in Brazil and the construction of women

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    Margarita Danielle Ramos

    2012-04-01

    Full Text Available O presente artigo busca compreender, à luz da teoria de gênero, como, ainda hoje, nos julgamentos de assassinatos de mulheres a prerrogativa da legítima defesa da honra tem sido usada na defesa do réu como tentativa de reversão da pena de homicídio qualificado. Para tanto, fizemos um estudo dos códigos da legislação vigente no Brasil relacionados ao tema de nosso trabalho desde o período colonial até os dias de hoje. O trabalho procura mostrar como o assassinato das mulheres é o final de uma rede de violações contra elas que tem seu início na forma como as mulheres são produzidas pelo discurso.This work uses a gender perspective to analyse the discourse in six documents in the jurisprudence of Minas Gerais. The objective is to understand how lawyers appeal until the present date to the legitimate defence of honour in trials of men who have killed a woman in order to avoid punishment for their crime. The analysis is based on two sets of studies: the study of the legislation concerning the concept of honour since the colonial period in Brazil and the study of the struggle that the Brazilian feminist movement has undertaken to remove violence against women from the private sphere and turn it into gender violence. The work attempts to show that the murder of women is the final step in a chain of violations against women, which begins in the devalued way that women are produced in discourse.

  6. Potencial de preparados de cavalinha (Equisetum sp. na síntese de metabólitos de defesa em cotilédones de soja (Glycine max L. e o efeito sobre o crescimento de Rhizoctonia solani Kuhn, in vitro.

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    SS GUIMARÃES

    2015-03-01

    Full Text Available Foram desenvolvidos dois experimentos com objetivo de avaliar o potencial de preparados de cavalinha (Equisetum sp. na síntese de metabólitos de defesa em cotilédones de soja (Glycinemax L. e o efeito sobre o crescimento de Rhizoctonia solani, in vitro. O delineamento experimental utilizado para os experimentos foi inteiramente casualizado em esquema fatorial 3x5 (formas de extração x concentrações, com quatro repetições. As formas de extração foram extrato alcoólico, infusão e maceração, nas concentrações de zero; 1; 10, 20 e 40%. No primeiro experimento foi avaliada a indução de compostos de defesa vegetal em cotilédones de soja em resposta aos derivados a base de cavalinha, sendo quantificada a atividade da enzima fenilalanina amônia-liase (FAL, via espectofotometria, a fitoalexina gliceolina, e o teor de fenóis totais. No segundo experimento, in vitro, a unidade experimental foi uma placa de Petri, sendo os preparados de cavalinha incorporados ao meio BDA (Batata-dextrose e Agar e avaliado o crescimento micelial de R. Solani. Os preparados de extrato alcoólico, infusão e maceração de cavalinha apresentaram capacidade de indução das fitoalexinas gliceolinas em cotilédones de soja, bem como, ativaram o metabolismo de compostos fenólicos. Entre os preparados, o extrato alcoólico e a maceração, se sobressaem sobre a infusão. Os preparados de extrato alcoólico, infusão e maceração de cavalinha em todas as suas concentrações inibem o crescimento do fungo R. solani, in vitro.

  7. O jornal Stella d’Italia e a defesa da escola étnica italiana (1902-1904 - Stella d’Italia newspaper and the defense of ethnic italian school (1902-1904

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    Gelson Leonardo Rech

    2015-04-01

    Full Text Available O artigo analisa dois elementos recorrentes nas edições dos três primeiros anos do jornal porto-alegrense Stella d’Italia (1902-1904, editado em italiano, a saber: o descontentamento com relação ao estado em que se encontrava a instrução entre os italianos e ítalos-brasileiros em Porto Alegre e a polêmica com o cônsul italiano Enrico Ciapelli, que resultou na suspensão do envio de material às escolas italianas, mantidas pelas sociedades italianas apoiadoras do jornal. A polêmica, não relatada nos relatórios oficiais do cônsul, teve como elemento detonador a acusação, sustentada pelo editor do jornal, de que o cônsul pouco se interessava pela escola italiana e pelos compatriotas. Considerando-se a escassa literatura sobre as escolas étnicas italianas de Porto Alegre, o jornal Stella d’Italia tem particular importância pelo destaque frequente à temática da educação e pela marcante opinião e zelo do editor, Adelchi Colnaghi, pela escola étnica italiana. Os apelos e considerações de Colnaghi na defesa da escola italiana, seu diagnóstico sobre as dificuldades da mesma, bem como o estado da educação entre os italianos em Porto Alegre foi reiterado, muitas vezes, nas páginas do jornal. Colnaghi estava convencido da importância da escola italiana, mas na perspectiva do jornal pouco se fez pela mesma e, às vezes, se fez contra.Palavras-chave: Stella d’Italia, Adelchi Colnaghi, Enrico Ciapelli, escolas étnicas italianas. STELLA D’ITALIA NEWSPAPER AND THE DEFENSE  OF ETHNIC ITALIAN SCHOOL (1902-1904AbstractThis article analyses two recurrent elements on the three first-year issues (1902-1904 of Stella d’Italia, a Porto Alegre’s newspaper edited in italian, specifically the dissatisfaction with the condition of the Italian education in Porto Alegre, and the fuss involving the Italian consul Enrico Ciapelli, which resulted in the interruption of school materials being delivered to italian schools kept by the

  8. Role of Exchange Equilibria in Structural Chemistry; Role des Equilibres d'Echange en Chimie Structurale; Rol' ravnovesiya obmena v strukturnoj khimii; Papel de los Equilibrios de Intercambio en Quimica Estructural

    Energy Technology Data Exchange (ETDEWEB)

    Van Wazer, J. R.; Moedritzer, K. [Monsanto Company, St. Louis, MI (United States)

    1965-10-15

    partes de estructuras moleculares. Ademas, se han estudiado cuantitativamente los equilibrios entre estructuras ciclicas y aciclicas. El hincapie que la quimica estructural hace sobre los compuestos del carbono (como lo pone de manifiesto la division de la'quimica descriptiva en las categorias e inorganica) se atribuye al hecho de ser sumamente lentas las reacciones de intercambio donde intervienen enlaces C-C o uniones entre carbono y cualquier otro atomo que no posea orbitales de enlace libres en niveles bajos (por ejemplo: Si, Ge, N, P, As, O, S, Se, F, Cl, Br). No obstante ello, hay vastos dominios de la quimica inorganica que no han podido describirse dado que las moleculas sufren reacciones de intercambio tan rapidas que resulta imposible separarlas. Sin embargo, se las puede identificar y valorar por metodos ffsicos (tales como la resonancia magnetica nuclear) con constantes de tiempo pequenas, a condicion de someter los datos obtenidos a un tratamiento matematico adecuado, siendo este tratamiento de una complejidad que justifica el empleo de una calculadora rapida [6,16]. Los topicos expuestos se ejemplifican [2, 12, 24, 28] mediante sistemas especificos seleccionados entre. los trabajos mas recientes del autor. Ademas de los estudios de equilibrio, se presta atencion a la cinetica [26, 27] de los procesos de intercambio. Se presentan varios teoremas generales que permiten predecir los tipos y cantidades de productos [6, 18]. (author) [Russian] Hotja v proshlom znachitel'- naja dolja usilij v oblasti reakcij obmena byla posvjashhena razboru monofunkcional'nyh zame- stitelej v polifunkcional'nom atome ili ego chasti, slozhnye molekuly mogut takzhe pod- vergat'sja obmenu chastej i davat' takim obrazom ravnovesnoe raspredelenie razlichnyh molekuljarnyh razmerov i form. Ispol'zovanie jadernogo magnitnogo rezonansa (JaMR) s vysokim razresheniem dlja issledovanija takih ravnovesnyh smesej slozhnyh soedinenij bylo opisano v 1964 i 1965 g g . vo mnogih dokladah

  9. Chemical and isotopic characteristics of rainwater at Los Humeros geothermal field, Puebla, Mexico and surrounding areas; Caracteristicas quimicas e isotopicas del agua de lluvia en el campo geotermico de Los Humeros, Puebla, Mexico y zonas aledanas

    Energy Technology Data Exchange (ETDEWEB)

    Tovar Aguado, Rigoberto; Cruz Grajales, Irma [Comision Federal de Electricidad, Los Humeros, Puebla (Mexico)

    2000-12-01

    A study of chemical and isotopic characteristics of rainwater at Los Humeros geothermal field was undertaken for the second consecutive year. Samples were collected in seven stations-two inside the field and five on the periphery. In 1996, a total of 99 samples were collected and 104 were collected in 1997. Of these, 19-18.26% of the total-had a negative alkalinity. The Atempan (No.5) and Campamento (No.1) stations showed the highest number of anomalous samples (31.25 and 27.8%, respectively). Anomalous samples in Perote station were not observed a result that we attribute to the predominant wind direction. The results for the Campamento station are attributed to the thermal inversion phenomena occurring when the samples with negative alkalinity were obtained. Concentrations of cations in some samples were relatively high, with the maximum concentration of calcium in the Los Humeros station (79.7 ppm) . Other significantly high values were found in the Texcal station (34.8 ppm) and Perote (33.8 ppm) due to the presence of dust particles scattered in the air and because of the lack of pavement where the sampling stations are located. Another factor affecting these figures could be the presence of block and lime factories in the neighborhood. Although measured concentrations may seem high, reports exist with similar concentrations in nongeothermal areas. Oxygen-18 and deuterium contents were determined for each stations, mixing anomalous samples. The results show that the most enriched samples correspond to the San Juan Xiutetelco, Puebla (No. 6) station and the minimum to the Perote Veracruz (No. 7) station. The concentration of SO{sub 4} has marine and industrial origins, with a contribution of the first source ranging between 10 and 25 percent. [Spanish] En el campo geotermico de Los Humeros, Puebla se realizo, por segundo ano consecutivo, la caracterizacion quimica e isotopica de agua de lluvia en muestras colectadas en siete estaciones, dos localizadas dentro

  10. Acolhimento institucional de crianças e adolescentes: gestão para proteção integral e defesa de cidadania http://dx.doi.org/10.15601/1983-7631/rt.v9n16p70-82

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    Liziane Vasconcelos Teixeira Lima

    2016-06-01

    Full Text Available Resumo O presente artigo aborda a gestão das entidades de acolhimento institucional para crianças e adolescentes, que enfrentam, hoje, o desafio de um processo de reordenamento institucional a partir das normativas oficiais. Como metodologia, procede a uma revisão bibliográfica para embasar uma discussão sobre a gestão das entidades. Inicialmente, contextualiza a mudança, na política pública para a criança e o adolescente, do paradigma da situação irregular para a doutrina da proteção integral. Analisa a atual necessidade do reordenamento institucional e as dificuldades das entidades de acolhimento nesse processo. Buscando contribuir para a superação dessas dificuldades, apresenta o projeto político-pedagógico como elemento central no processo de reordenamento institucional, na perspectiva da promoção e defesa dos direitos das crianças e adolescentes. Nessa direção, oferece elementos para a gestão e a qualidade do serviço: organização do prontuário da criança/adolescente e elaboração do fluxograma que orienta o atendimento.     

  11. Chemical Production using Fission Fragments; Emploi des fragments de fission dans la production de substances chimiques; Ispol'zovanie produkto v raspada v khimicheskom proizvodstve; Empleo de los fragmentos de fision en la industria quimica

    Energy Technology Data Exchange (ETDEWEB)

    Dawson, J K; Moseley, F [AERE, Harwell (United Kingdom)

    1960-07-15

    'eau. Aucun des systemes etudies jusqu'a present ne parait offrir de possibilites interessantes pour la grande industrie chimique. (author) [Spanish] En una memoria presentada en la segunda Conferencia Internacional sobre la Utilizacion de la Energia Atomica con Fines Pacificos [A/Conf. 15/P. 76] se expusieron algunas consideraciones , atendiendo al diseno de los reactores, sobre la utilizacion de la energia de retroceso de los fragmentos de fision para la produccion de ciertos compuestos quimicos de importancia industrial. La presente memoria pasa revista a los progresos realizados desde entonces en esta materia por el Atomic Energy Research Establishment de Harwell. Los autores examinan la relacion entre el alcance y la energia para los fragmentos de fision al discutirse la eleccion del combustible para un reactor destinado a la produccion de compuestos quimicos y describen la variacion de efecto quimico observada a lo largo de la trayectoria de los fragmentos de fision en la irradiacion de mezclas de nitrogeno y oxigeno. Analizan tambien los resultados de investigaciones recientes acerca de los efectos de fragmentos de fision sobre mezclas de monoxido de carbono e hidrogeno y sobre el vapor de agua. Al parecer, ninguno de los sistemas estudiados hasta la fecha ofrece perspectivas particularmente interesantes para la industria quimica pesada. (author) [Russian] V doklade, predstavlennom ran'she na Vtoroj mezhdunarodnoj konferentsii Organizatsii Ob'edinennykh Natsij po mirnomu ispol'zovaniyu atomnoj ehnergii (A/Conf. 15/P. 76) v svyazi s konstruktsiej reaktorov obsuzhdalis' nekotorye soobrazheniya otnositel'no vozmozhnosti ispol'zovaniya ehnergii otdachi produktov raspada dlya proizvodstva vazhnykh dlya promyshlennosti khimikaliev. V nastoyashchem doklade rezyumiruyutsya bolee nedavnie rezul'taty, dostignutye v ehtoj oblasti Nauchno-issledo-vatel'skim institutom po atomnoj ehnergii v KHaruehlle. Sootnoshenie mezhdu prokhodimym rasstoyaniem i ehnergiej produktov deleniya

  12. Citronella essential oil in the control and activation of coffee plants defense response against rust and brown eye spot Óleo essencial de citronela no controle e na ativação de respostas de defesa do cafeeiro contra a ferrugem e cercosporiose

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    Ricardo Borges Pereira

    2012-08-01

    controle de doenças em plantas, em alternativa ao uso de fungicidas. Neste trabalho, objetivou-se avaliar o óleo essencial de citronela no controle da ferrugem e cercosporiose e na ativação de respostas de defesa em cafeeiro. Plantas com 12 meses foram pulverizadas com o óleo de citronela 1.000 µL L-1, acibenzolar-S-metil 200 mg L-1 e fungicida tebuconazole 200 mg L-1 e inoculadas com Hemileia vastatrix e Cercospora coffeicola sete dias após. Repetiu-se a aplicação após 30 dias. Plantas com cinco meses foram pulverizadas com os mesmos tratamentos para avaliar as respostas de defesa induzidas. O óleo de citronela controlou a ferrugem e a cercosporiose com eficácias de 47.2% e 29,7%, respectivamente, enquanto tebuconazole apresentou controles de 96,5% e 90,5%, respectivamente. Acibenzolar-S-metil reduziram em 55,9% a cercosporiose da ferrugem e não apresentou controle significativo da ferrugem. O óleo de citronela aumentou as atividades de peroxidase e quitinase em mudas de cafeeiro 336 e; 24 e 336 horas após pulverização, respectivamente. Acibenzolar-S-metil aumentou as atividades de peroxidase, quitinase e β-1,3-glucanase 192, 288 e 336 e; 24 e; 240 horas após pulverização, respectivamente. Os tratamentos não promoveram aumento de fenóis, mas aumento significativo no teor de lignina foi observado em plantas pulverizadas com óleo de citronela.

  13. Identificação e Diferença na Construção de Identidades Culturais de Torcedores Rivais dos Três Grandes Clubes da Cidade do Recife: Entre a Defesa e o Ataque em Interações Sociais Virtuais

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    Bruno Rafael Torres Ferreira

    2015-01-01

    Full Text Available Visando identificar como os mecanismos de identificação e a diferença são usados na construção das identidades de torcedores de clubes de futebol em interações sociais, principalmente a partir da presença de torcedores rivais e de como estes são vistos e significados pelo outro, realizamos a presente pesquisa qualitativa, dentro de uma tradição interpretativista. Para tal, fizemos uma netnografia da comunicação, que nos permitiu acessar e analisar interações sociais de torcedores dos três principais clubes da cidade de Recife: Sport, Náutico e Santa Cruz. A coleta de dados se deu na rede social Facebook, nos perfis das principais torcidas destes clubes (SportNet, TimbuNet e CoralNet, bem como no perfil de um dos autores. Localizamos como processo de identificação o modo como estes torcedores direcionam suas participações em direção ao grupo social ao qual pertencem, a partir de suas demonstrações de incentivo, de exaltação e de defesa de seus interesses, em relação ao clube para o qual torcem, ao mesmo tempo em que seus rivais são ridicularizados e insultados. O conceito de diferença, por sua vez, esteve presente na constituição das “fronteiras” que delimitam a identidade dos torcedores nesta dinâmica.

  14. Envolvimento de receptores 5-HT2C do hipocampo ventral em comportamentos de defesa de ratos no labirinto em cruz elevado Involvement of ventral hippocampus 5-HT2C receptors on defensive behaviors of rats in the elevated plus-maze

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    Marília Greidinger Carvalho

    2012-04-01

    Full Text Available A ativação farmacológica dos receptores 5-HT2C induz comportamentos de defesa em modelos animais. O estudo busca investigar se o bloqueio seletivo de receptores 5-HT2C no hipocampo ventral (HV previne comportamentos defensivos induzidos por um agonista de receptor 5-HT2C administrado perifericamente em ratos expostos ao labirinto em cruz elevado (LCE. Quinze minutos após injeções intraperitoniais (IP, 1ml/kg do agonista 5-HT2C WAY-161503, ratos foram microinjetados bilateralmente no HV com o antagonista seletivo de receptores 5-HT2C SB-242084 (0, 0,1, 0,5 ou 1.5μg. Dez minutos após, cada animal foi exposto ao LCE para o registro de categorias de ansiedade. Injeções sistêmicas do WAY-161503 reduziram seletivamente as explorações nos braços abertos e aumentaram padrões de avaliação de risco. Esse efeito foi atenuado de maneira dose-dependente pela microinjeção de SB-242084 no HV, confirmando a ação ansiogênica de agonistas 5-HT2C e sugerindo que esse perfil comportamental seja mediado, pelo menos em parte, por receptores 5-HT2C do HV.Pharmacological 5-HT2C receptor activation induces defensive behaviors in several animal models of anxiety. The present study investigated whether the selective blockade of 5-HT2C receptors in the ventral hippocampus (VH prevents defensive behaviors induced by a 5-HT2C agonist administered systemically in rats exposed to the elevated plus-maze (EPM. Fifteen minutes after intraperitonial (IP, 1ml/kg injections of the selective 5-HT2C receptor agonist WAY-161503 (3 mg/kg, rats were bilaterally microinjected with the selective 5-HT2C antagonist SB-242084 (0, 0.1, 0.5 or 1.5μg into the VH. Ten minutes after, each animal was exposed to the EPM for measuring classical and ethological anxiety measures. IP WAY-161503 injections selectively decreased open-arm exploration while increasing risk-assessment. This anxiogenic-like action was dose-dependently attenuated by intra-VH SB-242084 microinjections

  15. Exposição ao ruído tecnológico em cti: estratégias coletivas de defesa dos trabalhadores de enfermagem La exposición al ruido tecnológico en un centro de terapia intensiva: estrategias colectivas para la defensa de los trabajadores de enfermería Exposure to noise technology in an intensive therapy center: collective strategies for the defense of workers in nursing

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    Elias Barbosa de Oliveira

    2009-03-01

    Full Text Available Estudo descritivo com abordagem qualitativa que objetivou identificar e analisar as estratégias coletivas de defesa elaboradas pelos trabalhadores de enfermagem diante do ruído tecnológico em Centro de Terapia Intensiva (CTI. Participaram do estudo 25 trabalhadores de enfermagem de um hospital universitário situado no município de Niterói (RJ em 2004. Na coleta de dados, utilizou-se a entrevista semi-estruturada mediante um roteiro, e, no tratamento dos dados, a análise de conteúdo revelou os seguintes resultados: o ruído tecnológico gera incômodo e estresse. Para minimizar o sofrimento, os trabalhadores elaboram estratégias coletivas de defesa que os mantêm trabalhando. Conclui-se que as estratégias coletivas de defesa podem se caracterizar num fator que resulta em alienação, ocultando a compreensão real do contexto de trabalho. As ações preventivas e as mudanças a serem implementadas em relação ao ruído no CTI devem ser pautadas na participação dos trabalhadores e se reverterem em melhoria das condições de trabalho e bem-estar do grupo.Estudio descriptivo con un enfoque cualitativo diseñado para analizar las estrategias colectivas de la defensa elaboradas pelos trabajadores de enfermería frente al sonido tecnológico en un centro de terapia intensiva. Veinticinco profesionales de la enfermería de un centro de terapia intensiva del Hospital Escuela en Niteroi (RJ participaron en el estudio en 2004. Para la recolección de datos, una entrevista semi estructurada fue utilizada. Los datos fueron analizados a través de una análisis de contenido que mostraran los resultados: los trabajadores elaboran estrategias colectivas de defensa que permiten trabajar. Estas estrategias muestran un conocimiento que permite a los individuos seguir trabajando, ya que crea formas adaptativa para contrarrestar el sonido en el ambiente de trabajo, buscando continuamente ser sujetos de la situación de trabajo. Adicionalmente

  16. Para a defesa de uma ética ambiental antropocentrada

    Directory of Open Access Journals (Sweden)

    Magda Costa Carvalho

    2015-08-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2015v14n1p147 Os debates produzidos pelas éticas ambientais contemporâneas tendem a recusar, na sua maioria, qualquer abordagem de fundo antropocêntrico, identificando esta postura com uma desvalorização absoluta da natureza em detrimento dos interesses humanos. Para além disso, é comum entenderem-se os interesses da espécie humana como uma instrumentalização abusiva do ambiente, sobretudo com a finalidade de produzir bem-estar social e económico. A presente reflexão pretende contestar estas posições, promovendo uma distinção entre a legítima percepção e valorização da natureza a partir do ponto de vista humano e uma ilegítima atitude de arrogante desvalorização e instrumentalização do meio ambiente. Procuraremos defender que o equilíbrio e a sustentabilidade bióticas dependem da promoção de uma atitude que tem sido caracterizada, entre os especialistas, como um antropocentrismo fraco ou moderado, e cujo alcance e potencialidades éticas não nos parecem ter recebido ainda a devida atenção.

  17. Murcha de fusário em helicônia: fontes de resistência, método alternativo de detecção e defesa estrutural Heliconia’s Fusarium wilt: resistance sources, alternative method of detection and structural mechanisms

    Directory of Open Access Journals (Sweden)

    Neilza Reis Castro

    2010-03-01

    Full Text Available O cultivo das helicônias vem sendo afetado pela murcha, causada por Fusarium oxysporum f.sp. cubense. Este trabalho objetivou identificar fontes de resistência, verificar a detecção da resistência através de método alternativo e avaliar a lignificação como mecanismo de defesa do hospedeiro ao patógeno. As espécies utilizadas na identificação de resistência foram Heliconia bihai, H. psittacorum cvs. Golden Torch e Golden Torch Adrian, H. rostrata, H. stricta cvs. Capri e Fire Bird, H. psittacorum cvs. Sassy e Alan Carle, H. caribea, H. latispatha, H. wagneriana e H. chartacea cv. Sexy Pink. A avaliação dos sintomas foi realizada aos 40 dias após a inoculação baseada em escala de notas variando de 1 a 6. As espécies consideradas resistentes foram H. bihai, H. psittacorum cvs. Golden Torch e Golden Torch Adrian, H. rostrata, H. stricta cv. Capri, H. psittacorum cv. Sassy e H. caribea. O método alternativo de detecção de resistência consistiu na utilização de filtrado fúngico obtido a partir do cultivo em meio Czapek, utilizando várias concentrações do mesmo depositando em folhas destacadas das cultivares resistentes e suscetíveis H. psittacorum cvs. Golden Torch e Alan Carle, respectivamente. A avaliação foi feita após 48 horas de incubação, onde a concentração em 50% do filtrado foi a mais eficiente na distinção da resistência. O mecanismo estrutural foi observado em secções histológicas nas raízes das espécies utilizadas no estudo de resistência, inoculadas com o método de injeção e não inoculadas, que permitiram verificar a ausência de relação entre a resistência e a lignificação.Heliconia grown as a crop has been affected by wilt, caused by Fusarium oxysporum f.sp. cubense. This work aimed to identify genetic resistances sources, to evaluated the detection of resistance with an alternative method and to verify the effects of structural mechanisms in pathogen resistance. The genotypes

  18. Application of SPCALC for chemical and thermodynamic speciation of fluids -example for wells LV-4A, LV-11 and LV-13, Las Tres Virgenes geothermal field, BCS; Aplicacion del SPCALC en la especiacion quimica y termodinamica de fluidos: ejemplo del caso de los pozos LV-4A, LV-11 y LV-13, del campo geotermico de Las Tres Virgenes, BCS

    Energy Technology Data Exchange (ETDEWEB)

    Viggiano Guerra, J.C.; Sandoval Medina, F.; Flores Armenta, M.C. [Comision Federal de Electricidad, Gerencia de Proyectos Geotermoelectricos, Morelia, Michoacan (Mexico)]. E-mail: fernando.sandoval@cfe.gob.mx, E-mail: magaly.flores@cfe.gob.mx; Perez, R.J. [Universidad de Calgary (Canada); Gonzalez Partida, E. [Universidad Nacional Autonoma de Mexico, Centro de Geociencias, Mexico, D.F. (Mexico)

    2009-01-15

    + CO{sub 2}) if boiling occurs or is induced, for instance, by flashing. Reactions occurring during the process produce the rest of the observed minerals in rocks (illite+quartz{+-}epidote), although the balance diagrams do not truly represent the process due to the just-mentioned explanation. On the other hand the oversaturated phases, according to SPCALC, are mainly silica varieties (from quartz to chalcedony), a prediction that is confirmed by the silica scaling occurring at superficial installations. Calcite, on the contrary, is reported as unsaturated, an apparent contradiction with reality, which shows problematic calcite scaling produced during the well exploitation according to the same just-mentioned mechanism. It is therefore recommended to adjust the SPCALC calculations at the reservoir level to be able to prevent imminent calcite scaling. Chemical and multi-phase speciation by using SPCALC results are useful and practical, if results are interpreted carefully. [Spanish] El SPCALC es un excelente software recientemente adquirido por la Comision Federal de Electricidad (CFE) a traves de un contrato con la Universidad Nacional Autonoma de Mexico (UNAM) y la universidad de Calgary, Canada, mediante el cual se obtiene la especiacion quimica y multifasica de fluidos geotermicos. La metodologia consiste en el calculo de variables termodinamicas, tales como las actividades (a) y las fugacidades (f) de las especies quimicas, asi como los indices de saturacion (log Q/K) de las fases minerales del yacimiento, lo que implica que modela condiciones termodinamicas de yacimiento (pH entre otras cosas) contribuyendo asi a pronosticar incrustaciones y corrosion dado que tambien simula la tasa de corrosion de los fluidos. En este articulo se modelan fluidos que han percolado a traves de rocas granodioriticas cretacicas de los pozos LV-4A, LV-11 y LV-13 del campo geotermico de Las Tres Virgenes, BCS, haciendo uso del software mencionado a partir de sus analisis quimicos. Asi

  19. Didáticas e discursos em defesa do desenho como objeto de ensino e de sua inserção na instrução pública luso-brasileira - Didactics and discourses in defense of the drawing as an object teaching and its inclusion in public luso-brazilian education

    Directory of Open Access Journals (Sweden)

    Gláucia Maria Costa Trinchão

    2011-03-01

    Full Text Available Resumo O texto identifica e analisa idéias que nortearam as políticas educacionais e propostas didático-pedagógicas apontadas no século XVII, ampliadas no XVIII, que ajudaram a socializar o Desenho como disciplina escolar e guiaram a elaboração de novos mecanismos didáticos na cultura ocidental no século XIX. O desempenho na arte do Desenho ora seguia os propósitos da educação da visão e da mente de Comenius, ora em busca da justeza do olho e da flexibilidade da mão na orientação de Rousseau, ou pela precisão do pensamento e da observação aplicada por Pestalozzi, ou ainda de forma natural e intuitiva indicada por Froebel, o desenhar como atividade inerente ao indivíduo. Destaca também, discursos de artistas e pedagogos portugueses em defesa do Desenho como objeto de ensino para instrução pública e como meio civilizador. Palavras-chave: história da disciplina de desenho; didática do desenho; defensores do desenho.   DIDACTICS AND DISCOURSES IN DEFENSE OF THE DRAWING AS AN OBJECT TEACHING AND ITS INCLUSION IN PUBLIC LUSO-BRAZILIAN EDUCATION Abstract The text identifies and analyses the ideas that guided the educational policies and didactic-pedagogic proposals created in the XVII century and developed throughout the XVIII century, which helped to socialize Drawing as a school discipline, and lead to the development of new didactic mechanisms in the XIX century western cultures. The development in the Art of Drawing changed its guidelines according to whom it followed it could either pursue the sharpness of the eye and the flexibility of the hand, according to Rousseau, as it could aim for the precision of the mind and of the observation defended by Pestalozzi, or it could accept the natural and intuitive way to develop the Art of Drawing defended by Froebel, drawing as inherent activities in the individual. It also highlights Portuguese pedagogues and artists speeches in defense of Drawing, both as public teaching

  20. The effects of canopy cover on throughfall and soil chemistry in two forest sites in the Mexico City air basin; Los efectos de la cobertura de dosel en disminucion y la quimica del suelo en dos lugares de bosque en la cuenca de aire de la Ciudad de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Suarez, M. [Instituto Potosino de Investigacion Cientifica y Tecnologica (IPICYT), San Luis Potosi, S.L.P. (Mexico)]. E-mail: marlin@ipicyt.edu.mx; Fenn, M.E. [United States Department of Agriculture Forest Service Pacific Southwest Research Station, Forest Fire Laboratory, Riverside, California (United States); Cetina-Alcala, V.M.; Aldrete, A. [Instituto de Recursos Naturales, Colegio de Postgraduados, Montecillo, Edo. de Mexico (Mexico)

    2008-01-15

    Throughfall and soil chemistry were compared in two sites with differing atmospheric deposition: Desierto de los Leones National Park (high atmospheric deposition) and Zoquiapan National Park (low atmospheric deposition). Throughfall fluxes of NO{sub 3}-, SO{sub 4}{sup 2}-, Ca, Mg and K were compared under two canopy cover types: Abies religiosa Schl. (fir) and Pinus hartwegii Lindl. (pine), in comparison with sites without cover canopy, e.g. forests clearings. Throughfall fluxes decreased in the following order: fir > pine > forest clearing. Nitrogen balance under canopy of fir and pine resulted in negative values for net throughfall of NH{sub 4}+ at Desierto de los Leones and Zoquiapan, while NO{sub 3}-, only resulted in negative values under canopy cover at the low deposition site. With few exceptions, concentrations of total C, N and S, soluble SO{sub 4}{sup 2}-, and Ca{sub 2}+ were higher in soil under fir canopies than under pine or in forest clearings. In polluted sites, the densely foliated fir canopies generally resulted in higher throughfall fluxes and soil accumulation of N, S and Mg compared to pine canopies or open areas. The elevated atmospheric depositions affect the functional process of forest ecosystem, particularly the throughfall and nutrients intern cycle, and these effects depend of the cover and present tree species. [Spanish] El escurrimiento foliar y la quimica del suelo fueron comparados en dos sitios con diferente deposito atmosferico: el Parque Nacional Desierto de los Leones (alto deposito atmosferico) y el Parque Nacional Zoquiapan (bajo deposito atmosferico). Se compararon los flujos de NO{sub 3}-, SO{sub 4}{sup 2}-, Ca, Mg y K en el escurrimiento foliar bajo el dosel de dos especies de arboles: Abies religiosa Schl. (oyamel) y Pinus hartwegii Lindl. (pino), en comparacion con sitios sin cobertura, es decir en claros del bosque. Los flujos disminuyeron en el siguiente orden: oyamel >pino >claros. El consumo de N del dosel resulto en

  1. Chemical tools: epoxic resins; Herramientas quimicas: resinas epoxidicas

    Energy Technology Data Exchange (ETDEWEB)

    Paz, S.; Pazos, M.; Prendes, P.

    1998-10-01

    Epoxy resins are very useful products for different applications in different fields. Due to the fact that they are a highly versatile products they can be considered as chemical tools. However the epoxy resins must be correctly formulated in order to obtain the final properties. In this article an easy and reliable method to optimise the energy formulation is presented. (Author)

  2. Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion

    Energy Technology Data Exchange (ETDEWEB)

    Cartledge, G H [Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1962-03-15

    periodico, es particularmente adecuado para algunos de estos estudios. Las ventajas do este elemento estriban, en sus propiedades nucleares. La memoria resume las propiedades quimicas de los compuestos de tecnecio y las compara con las de los compuestos correspondientes de {sup 51}Cr, de molibdeno y de wolframio, que con tanta frecuencia se emplean en el estudio de la inhibicion. La memoria describe seguidamente ciertos estudios experimentales como ejemplo de los usos a que se ha destinado el tecnecio en los trabajos de este tipo. Entre ellos menciona estudios empiricos de su accion como eficaz inhibidor de la corrosion del hierro, y observaciones de la actividad de superficie realizadas durante periodos largos de tiempo. Otros estudios efectuados con {sup 99}Tc y con {sup 131}I han demostrado la importancia de la adsorcion competitiva de iones en la determinacion de la cinetica de los procesos de corrosion y de inhibicion. Como tercer ejemplo, describe como las propiedades excepcionales del tecnecio han permitido distinguir claramente las contribuciones relativas del oxigeno de las del inhibidor oxidante en el mantenimiento de la pasividad. (author) [Russian] Sredi faktorov, vkhodyashchikh v fundamental'noe izuchenie ehlektrokhimicheskikh protsessov korrozii i tormozheniya, vydelyayutsya v chastnosti sleduyushchie: a) razlichnye vidy adsorbtsionnykh yavlenij; b) ionoobmennye svojstva passivnykh plenok; c) ehlektrokhimicheskaya kinetika kak anodnykh, tak i katodnykh protsessov, proiskhodyashchikh mezhdu metallom i korrozijnoj sredoj. Teper' pri pomoshchi radioizotopov mozhno provesti nekotorye issledovaniya ehtikh yavlyaenij, kotorye nevozmozhno osushchestvit' obychnymi sredstvami. Tekhnetsij, gomolog margantsa v periodicheskoj sisteme, okazalsya ves'ma podkhodyashchim dlya nekotorykh ehtikh issledovanij. Ego yadernye svojstva krajne interesny u ehtom otnoshenii. V doklade kratko izlagayutsya khimicheskie svojstva soedinenij tekhnetsiya, protivopostavlennye svojstvam

  3. Removal of Perchlorate from Water and Wastewater by Catalytic Hydrogen Gas Membrane Systems

    Science.gov (United States)

    2007-01-01

    Quimica, Serie A: Quimica Fisica e Ingenieria Quimica, 1984. 80(2): p. 219-25. Logan, B.E. and D. LaPoint, Treatment of Perchlorate- and Nitrate...ion at iridium electrodes. Ion concentration and solution pH effects. Anales de Quimica, Serie A: Quimica Fisica e Ingenieria Quimica (1985), 81(3

  4. Projeto Defesa à Vida: A Psicologia na Escola de Ensino Fundamental

    Directory of Open Access Journals (Sweden)

    Rafaela Fava de Quevedo

    Full Text Available RESUMO Esse relato de experiência baseia-se na intervenção realizada em uma escola pública do ensino fundamental. Através da descrição das atividades desenvolvidas foi possível compreender aspectos individuais e sociais, os quais afetam o indivíduo, em um ambiente considerado promotor de desenvolvimento. Os resultados apontam a eficácia das intervenções, atribuindo à escola um espaço protetivo. Com este estudo, espera-se contribuir para a reflexão sobre os métodos de intervenção em contextos escolares visando à promoção da saúde e ao favorecimento da busca por autonomia e a vida social.

  5. O tempo e o mundo: defesa de uma história planetária

    Directory of Open Access Journals (Sweden)

    Gustavo Velloso

    2016-12-01

    Full Text Available Resenha do livro: GRUZINSKI, Serge. As quatro partes do mundo: história de uma mundialização. Tradução de Cleonice Paes Barreto Mourão e Consuelo Fortes Santiago. Belo Horizonte: Editora UFMG; São Paulo: Edusp, 2014.

  6. POLÍTICA EXTERNA, SEGURANÇA E DEFESA NOS GOVERNOS LULA E CARDOSO

    Directory of Open Access Journals (Sweden)

    Marcos Valle Machado da Silva

    2010-12-01

    Full Text Available This study analyses the Foreign Policy during the president Lula government over the Defense and Security issues, comparing these ones with the previous government of president Fernando Henrique Cardoso to identify de continuity, specifically nuances or even ruptures about these themes. To that aim we will use the United Nations Peacekeeping Operations and Nuclear Arms Control and Disarmament as Defense and Security themes. Thus we intend to identify the continuity traces or even rupture on the themes of Defense and Security of the Brazilian Foreign Police along the governments of the two last Brazilian Heads of State.

  7. Uma nova sociologia em defesa das crianças e suas infâncias

    Directory of Open Access Journals (Sweden)

    Fabiana Oliveira Canavieira

    2017-06-01

    Full Text Available O artigo se apresenta como uma revisão de literatura da teoria sociológica tida como clássica, buscando estabelecer relações e destacar as contribuições dos principais fundamentos sociológicos à consolidação do campo da Sociologia da Infância, como novo paradigma teórico que têm as crianças e a infância como foco de seus estudos e atuação profissional. Sem a pretensão de se constituir como um estado da arte, faz-se um desvelamento das primeiras delimitações do novo campo teórico, ao passo que se exerce a reflexividade sociológica inspirada em Bourdieu, mas percorrendo outros sociólogos. Palavras-chave: Sociologia da Infância; Sociologia da Educação; Educação Infantil A new sociology in defense of children and their childhoods ABSTRACT The article presents a literature review of the classical sociological theory, seeking to establish relationships and highlight the contributions of the main sociological foundations to the consolidation of the field of Sociology of Childhood as a new theoretical paradigm that children and childhood are the focus of its studies and professional performance. Without intending to be a state of art, we unveil the first delimitations of the new theoretical field, while the sociological reflexivity inspired by Bourdieu is exercised, but using other sociologists equally important for the present reflection. Keywords: Sociology of Childhood; Sociology of Education; Early Children Education. Una nueva sociología en defensa de los niños y sus infancias RESUMEN El artículo se presenta como una revisión de la literatura de la teoria sociológica clásica, buscando establecer relaciones y poner de relieve las contribuciones de los principales fundamentos sociológicos para la consolidación del campo de la sociología de la infancia como un nuevo paradigma teórico que tienen los niños y la infancia como el foco de su estudios y desempeño profesional. Sin la pretensión de constituirse como un estado de la técnica, se trata de una presentación de los primeros límites del nuevo campo teórico, mientras lleva a cabo la reflexividad sociológica inspirado por Bourdieu, pero utilizando otros sociólogos de igual importancia a esta refl exión. Palabras clave: Sociología de la Infancia; Sociología de la Educación; Educación infantil

  8. A militarização da justiça e a defesa da democracia

    Directory of Open Access Journals (Sweden)

    Daniel dos Santos

    2011-01-01

    Full Text Available Traduzido por Bruno CardosoEste artigo aborda os modos de ação pública de um crescente militarismo em nossos dias e questiona a ameaça por ele representada para a cidadania, em contraposição com o Estado e as instituições. Disseminado graças ao controle das representações e das tecnologias de segurança, o militarismo acaba incorporado pela sociedade, fragmentando-a e pondo em risco o pensamento ultrapolítico. A democracia, apenas possível por meio deste, deve, assim, empreender, através da revisão das concepções de liberdade, igualdade e fraternidade, a reforma da justiça, hoje militarizada, e a incorporação de valores como o perdão e a hospitalidade incondicionais. The article The Militarisation of Justice and Defence of Democracy addresses the current modes of public action of increasing militarism and questionsthe threat this represents to citizenship, counterposed to the State and institutions. The control of security technologies and representations has led to the spread of militarism, which has been incorporated into society, fragmenting it and placing ultrapolitical thought at risk. Democracy, only possible through suchthought, must therefore revise the concepts of liberty, equality and fraternity in order to reform the currently militarised justice system and incorporate values such as unconditional forgiveness and hospitality.

  9. HANNA ARENDT VERSUS MARX: UMA DEFESA DE MARX FRENTE À CRÍTICA ARENDTIANA

    Directory of Open Access Journals (Sweden)

    Júlia Sebba Ramalho

    2009-03-01

    Full Text Available O presente trabalho trata das críticas de Hanna Arendt a Karl Marx especificamentena obra de Arendt A condição humana. No capítulo III desta obra Arendt versa sobre a atividadedo trabalho que, segundo ela, emergiu na Era Moderna como o principal foco das preocupaçõeshumanas. Para a autora a expressão teórica mais elaborada da emergência do animal laborans éa obra de Marx. Desse modo, toda a discussão do capítulo III de A condição humana gira emtorno das críticas de Arendt a Marx. No presente artigo trataremos de elucidar os aspectoscentrais desta crítica e de mostrar os equívocos de Arendt em sua leitura da obra marxiana.

  10. Florestan Fernandes e a defesa da educação pública

    Directory of Open Access Journals (Sweden)

    Roberto Leher

    2012-12-01

    Full Text Available O artigo examina os estudos teóricos de Florestan Fernandes e sua elaboração dedicada à causa da educação pública em dois períodos: o da Lei de Diretrizes e Bases de 1961 e o compreendido entre a Constituinte de 19871988 e a elaboração da Lei de Diretrizes e Bases, até o ano de 1995. Aborda questões de método para o estudo das concepções do sociólogo sobre a educação pública e destaca a centralidade do conceito de capitalismo dependente para compreender as mudanças em sua perspectiva sobre os entraves que impossibilitaram, no Brasil, reformas educacionais universalistas, características das revoluções burguesas clássicas.

  11. MODIFICACION QUIMICA DEL POLIPROPILENO Y SU POTENCIAL USO COMO AGENTE EXTRACTANTE DE IONES METALICOS.

    OpenAIRE

    PEREZ AMARO, LUCIA GABRIELA; PEREZ AMARO, LUCIA GABRIELA

    2008-01-01

    Es de interés en la presente tesis doctoral ampliar el campo de aplicación del polipropileno isotáctico homopolímero (PP) basándose en las propiedades mecánicas, químicas y el bajo costo de producción del polímero. Las excelentes propiedades mecánicas car 176p.

  12. EVALUACION FISICA MECANICA Y QUIMICA SOBRE CERRAMIENTOS UTILIZADOS POSTERIOR A UN INCENDIO

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    Valero, D.

    2015-06-01

    Full Text Available Esta investigación tuvo como objetivo evaluar el comportamiento ante el calor, de bloques de concreto aligerado y de poliestireno expandido de alta densidad, usados en losas y cerramientos en edificaciones prototipo. Se enmarca dentro de una investigación de campo, de carácter experimental y analítico-descriptivo, para lo cual se realizaron seis fases: recopilación de la información, caracterización físico-mecánica del revestimiento a utilizar, prototipos o módulos a ensayar, descripción de la sistemática del ensayo, caracterización físico-química de los materiales en estudio, y elaboración de recomendaciones de seguridad en caso de incendio. Se recopiló la información necesaria en materia de poliestireno expandido de alta densidad, y bloques aligerados con arcilla expandida mediante consultas de textos, manuales, normas, institutos, locales comerciales, publicaciones en internet, personal técnico capacitado con experiencia en el uso en obras de dichos materiales. La empresa especializada International Fire Services C.A. (IFSCA realizó el estudio requerido según normas. Entre los hallazgos relevantes se encontraron los altos valores de compuestos volátiles orgánicos durante la combustión del poliestireno expandido y la propiedad de los bloques aligerados con arcilla expandida como aislantes térmicos. This research is intended to evaluate the behavior of lightened concrete blocks and expanded high density polystyrene when exposed to heat, that are used in slabs and enclosures in prototype buildings. It is part of a field research, experimental and analytical-descriptive, for which six phases were carried out: collection of information, physical-mechanical character of coating to use, prototypes or modules to be tested, description of the scheme of testing, physical-chemical character of the materials under study and development of safety recommendations in case of fire characterization. The necessary information on expanded polystyrene high density, and lightweight blocks with expanded clay was collected through consultation of texts, manuals, standards, colleges, shops, online publications, trained personnel with experience using these materials. The specialized company International Fire Services C.A. (IFSCA conducted the study required under standards. Among the key findings there were the high levels of volatile organic compounds during combustion of expanded polystyrene and characteristics of the lightweight expanded clay blocks as thermal insulators were found.

  13. Feasibility of cogeneration systems in chemical industry; Viabilidade de sistemas de cogeracao em industria quimica

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Moises Henrique de Andrade; Balestieri, Jose Antonio Perrella [UNESP, Guaratingueta, SP (Brazil). Faculdade de Engenharia

    1998-07-01

    The increasing penetration of natural gas in the Brazilian energetic market, some industries as pulp and paper, chemical and that ones related to the food and beverage processes are some of the ones that are more interested in the cogeneration practice based on the burning of this fossil fuel. An analysis of a photographic chemical industry consumption data revealed that combined cycles and Diesel units were the most suitable for thermal following strategy, considering that the four compression chillers must be maintained, and steam or gas cycles in the case of a complete substitution for absorption chillers and the same strategy. The economic attractiveness was done according to the internal return rate and payback, revealing that the investment can be returned in short time. (author)

  14. Comportamiento de hormigones expuestos a condiciones naturales de alta agresividad quimica

    Directory of Open Access Journals (Sweden)

    Angel Oshiro

    2008-01-01

    Full Text Available Cuando se considera el hormigón en estado endurecido, un aspecto muy importante es la durabilidad del hormigón, la que puede depender del ambiente al que se expone o de causas internas del hormigón mismo. Este trabajo iniciado en el año 1976 por los ingenieros argentinos Oshiro y Rocha, centra su atención en el primer aspecto, presentando los resultados de la exposición de hormigones que estuvieron durante más de 20 años en un ambiente agresivo con elevado contenido de sulfatos y cloruros, geográficamente ubicado en Las Salinas Grandes, provincia de Córdoba, en el centro de la República Argentina. Los resultados difunden la experiencia de un caso real como un aporte para el medio científico y técnico, que permita tomar conciencia de las decisiones a tomar cuando el hormigón es expuesto a medios agresivos; permiten confirmar el deterioro químico progresivo de la pasta de cemento, en menor magnitud en hormigones con cemento puzolánico y la ventaja del empleo de bajas relaciones agua cemento y aditivo incorporador de aire en las principales propiedades del hormigón, controladas durante 20 años.

  15. Carcinogenese quimica por DMBA (7,12-dimethylbenzanthracene em camundongos femeas BALB/c: novos fatos

    Directory of Open Access Journals (Sweden)

    Krishna Duro de Oliveira

    2015-06-01

    Full Text Available Polycyclic aromatic hydrocarbons are known carcinogens used in rodent experimental models. In this study, the carcinogen DMBA (7,12-dimethylbenzanthracene was administered by gavage, diluted in corn oil, to female BALB / c mice at hebdomadary doses of 1 mg per animal for 1, 3, 6 or 9 weeks. Animals were weighed and monitored weekly until death. Remaining animals were euthanized at the age of 53 weeks. At necropsy, representative fragments of neoplasms were collected and routinely processed for histopathological analysis. Of all mice that received DMBA, 68.57% developed some type of tumor. Of the 70 mice treated with various doses of DMBA, 22 (31.43% developed mammary tumors. The adenoacanthoma was the most commonly (18.75% diagnosed histological type of breast cancer. Lung (15.71%, lymphoid tissue (11.43%, stomach (7.14% and skin (2.86% were also primary sites of tumor development. One third (33.33% of the mice receiving 1 mg of DMBA developed lung cancer. Therefore, the administration of DMBA was shown to be an efficient model of carcinogenesis in mice, especially for the study of breast cancer, when using the highest dose, and lung, when using the lowest dose. Carcinogenesis models have been used for several purposes in cancer research. These results represent new facts for a classic carcinogenesis model.

  16. Obtenção de gorduras low trans por interesterificação quimica

    OpenAIRE

    Miluska Castillo Caceres

    2008-01-01

    Resumo: As gorduras trans, principalmente presentes nos alimentos industrializados como biscoitos, gorduras para fritura, margarinas, entre outros, são resultados da hidrogenação parcial, processo utilizado pela indústria há mais de 100 anos Abstract:Trans fats, most contained within food industrialized and biscuits, fats for frying, margarine and others, are the result of partial hydrogenation, a process used by the industry for more than 100 years

  17. Efeito do pH sobre as caracteristicas fisico-quimicas do cream cheese.

    OpenAIRE

    Raquel Rossi Monteiro

    2004-01-01

    Resumo: Os objetivos deste trabalho foram padronizar uma condição de teste para avaliar a capacidade de derretimento do Cream cheese e avaliar o efeito do pH sobre a capacidade de derretimento, firmeza, equilíbrio físico-químico entre a matriz protéica e a fase aquosa do queijo e sobre a microestrutura do Cream cheese. Os queijos foram fabricados segundo metódo tradicional e a alteração do pH foi feita pós-processamento, através da exposição das amostras em atmosfera de hidróxido de amônio ou...

  18. On-line chemical cleaning of pipelines; Limpieza quimica de ductos en linea

    Energy Technology Data Exchange (ETDEWEB)

    Cross, Michael Brent [Brenntag Stinnes Logistics, Muelheim/Ruhr (Germany)

    2003-07-01

    The concern of efficiency and maintenance in the pipeline industry, due to fluids and sediments, has led the development of new methods of cleaning. Some methods of cleaning are described in this work with their advantages and disadvantages.

  19. ESTUDIO DE LA INTERRELACION ENTRE LA COMPOSICION Y QUIMICA DEL ROCIO CON LOS PROCESOS FOTOQUIMICOS ATMOSFERICOS.

    OpenAIRE

    Maria Angelica Rubio Campos; Ernesto Vicente Gramsch Labra; Eduardo Alejandro Lissi Gervaso; Maximiliano Araya Orellana; Marcela Shielien Cadiz Gin; Augusta Victoria Caroca Muñoz; Irene Eugenia Fuenzalida Farias; Cesar Antonio Gonzales Fernandez; Maria Jose Guerrero Duarte; Jimena Valentina Maira Solis; Elizabeth Salinas Donaire; Claudia Vega Vega; Natalia Zamorano Carrasco

    2004-01-01

    STUDY ON THE INTERRELATION BETWEEN COMPOSITION AND CHEMISTRY OF DEW AND ATMOSPHERIC PHOTOCHEMICAL PROCESSES The general objective of this project was to evaluate the impact of the different sources of radicals generated in the atmosphere of the city of Santiago, thus getting to know their relation to the chemical composition of dew, fog and rain. The hypothesis proposed in this study is that dews can include substances of photochemical origin, which might lead to the generation of smog...

  20. De Boulainvilliers a Tocqueville: da liberdade como defesa de privilégios à liberdade como defesa de diferenças From Boulainvilliers to Tocqueville: from freedom as defense of privilege to freedom as defense of differences

    Directory of Open Access Journals (Sweden)

    Helga Gahyva

    2012-12-01

    Full Text Available Desde meados da segunda metade do século XX, parte expressiva do pensamento social e político vem conferindo destaque à obra de Alexis de Tocqueville. Nesta etapa, sua reflexão é revista nos marcos da democracia liberal: haveria em sua abordagem preciosas sugestões quanto aos dilemas das democracias modernas. Tal percepção, porém, pressupõe certo nexo entre os conceitos de liberalismo e democracia distante do universo intelectual próprio às preocupações tocquevillianas. Pretende-se, neste artigo, apontar o viés conservador subjacente às análises de Tocqueville. Para tanto, sua obra será interpretada à luz da tradição liberal francesa na qual ela se insere, e que remonta à Querela das duas raças, protagonizada por Henri de Boulainvilliers no crepúsculo do século XVII. Trata-se da gênese de uma tripla polaridade que informa Tocqueville: em um eixo positivo, liberdade, heterogeneidade e descentralização; no negativo, igualdade, homogeneidade e centralização.From the second half of the 20th century on, several social and political writers have turned their attention to Alexis de Tocqueville's work. By doing that, these writers re-read Tocqueville from the perspective of liberal democracy. The basic assumption was that there was, in his approach, precious clues for the understanding of modern democracy dilemmas. This perception, though, supposes some nexus between the concepts of liberalism and democracy which is far from Tocquevillian intellectual scenery. In this article, I intend to identify the conservative bias inherent to Tocquevillian analysis. In this sense, his work will be interpreted in the light of French liberal tradition, in which it is located. It must be added that this tradition is connected to the two races quarrel, as defined by Henri de Boulainvilliers in the end of 17th century. It deals with the genesis of a triple polarity in Tocqueville's work: in a positive axis, liberty, heterogeneity and decentralization; in a negative one, equality, homogeneity and centralization.

  1. TOLERÂNCIA E DEMOCRACIA HOJE: O DISCURSO DE DEPUTADOS EM DEFESA DA POSIÇÃO CONSERVADORA

    Directory of Open Access Journals (Sweden)

    Deborah Christina Antunes

    2016-04-01

    Full Text Available Resumo A dialética do esclarecimento ainda se mostra presente nesta sociedade. Nos últimos anos, conquistaram-se direitos das chamadas minorias. Junto a essas conquistas, contudo, figuram ódio e intolerância em discursos pseudodemocráticos. Este artigo analisa o discurso da Comissão de Direitos Humanos da Câmara dos Deputados quando da aprovação do Projeto de Decreto Legislativo 234/2011 que visava alterar o Código de Ética do Psicólogo nos parágrafos que restringem qualquer correlação entre homossexualidade e distúrbios. Utiliza-se de estudos da Escola de Frankfurt sobre os discursos de agitadores fascistas, o preconceito e a personalidade autoritária. Baseando-se em Marcuse, questiona tolerância repressiva e democracia formal totalitária, avançando na compreensão da relação entre clima cultural e semiformação. Reflete acerca do preconceito como sintoma não exclusivo de conservadores, mas como forma de existência na atualidade, e aponta a necessidade da educação histórica e política para o desenvolvimento da consciência e superação da miséria e da opressão.

  2. The consumers defense versus the crisis of the natural gas; A defesa do consumidor diante da crise do gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, William Lima [Secretaria de Estado de Desenvolvimento Economico, Energia, Industria e Servicos, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Given the notorious unavailability of natural gas, the crisis initiated by the government of Bolivia and considering the irreversible damage that would be caused to consumers by the lack of product, which the solutions to ensure the minimum rights, or even discourage the consumption of gas for integrate with new prospects for rational use of energy. We discussed about the crisis and the role of the state in the Consumer Protection and the new sphere of regulation for the industry Gas Natural. (author)

  3. Análise do Banco de Atendimentos da Defesa Civil do Estado de São Paulo

    Directory of Open Access Journals (Sweden)

    Alessandra Cristina Corsi

    2010-01-01

    Full Text Available Nos últimos anos pode-se observar que a simples organização de dados já não representa um fator diferencial para as instituições, uma vez que, dependendo do seu volume, o método tradicional de análise e interpretação se torna extremamente lento e custoso. O uso de técnicas de mineração de dados surge como alternativa para tornar esse processo semi-automático. O presente trabalho tem por objetivo realizar um estudo de caso por meio de técnica de mineração de dados, baseado no programa WEKA aplicado em dados hidrometeorológicos e geomorfológicos coletados na região da Serra do Mar do Estado de São Paulo. Resultados obtidos a partir da aplicação da técnica de associação indicam que a presença de rocha e matacão em terrenos com cicatrizes e declividade alta são fatores relevantes para a ocorrência de deslizamentos.

  4. Análise sobre a Viabilidade de Revitalização da Indústria de Defesa Brasileira

    Directory of Open Access Journals (Sweden)

    Renato Peixoto Dagnino

    2007-01-01

    causas da baixa demanda interna, o impacto econômico e tecnológico da IBD. O método adotado foi o de confrontar aqueles argumentos e explorar aquelas questões baseando-se em análise documental. Pretende-se, assim, proporcionar informação abalizada de origem nacional e estrangeira capaz de propiciar uma maior reflexão sobre o tema pela sociedade.

  5. O papel das Forças Armadas na I&D da Defesa como vector de desenvolvimento nacional

    OpenAIRE

    Simões, Luís

    2010-01-01

    A humanidade sempre se preocupou com o seu bem-estar, de alguma forma. Neste âmbito, o desenvolvimento económico tem vindo a desempenhar um papel fundamental. Após a revolução industrial, mas particularmente depois da II Guerra Mundial, os Estados têm-se preocupado com o respectivo desenvolvimento económico sustentável, entre outras questões, como garante de bem-estar das suas populações. A investigação e desenvolvimento (I&D), no seu conjunto, têm sido apontados como um possível vector de de...

  6. Morfologia, comportamento, parasitismo e mecanismos de defesa dos imaturos de Heraclides anchisiades capys (Hübner)(Lepidoptera, Papilionidae)

    OpenAIRE

    Leite,Luis Anderson Ribeiro; Casagrande,Mirna Martins; Mielke,Olaf Hermann Hendrik

    2010-01-01

    Heraclides anchisiades capys é uma espécie comum de Papilionidae, cujas larvas se alimentam de várias espécies de Citrus spp. (Rutaceae). Neste estudo são descritas a morfologia e dados sobre a história natural dos imaturos através de ilustrações, incluindo fotografias em microscopia eletrônica de varredura.

  7. VISITA DOMICILIÁRIA: TECNOLOGIA DE CUIDADO UTILIZADA PELO ENFERMEIRO NA DEFESA DA SAÚDE DA CRIANÇA

    Directory of Open Access Journals (Sweden)

    Raquel Dully Andrade

    2015-01-01

    Full Text Available Este estudio tuvo como objetivo identificar elementos de cuidado favorables a la infancia en la visita domiciliaria, desde las narrativas de enfermeros, en la perspectiva de la atención y de la defensa del derecho a la salud de los niños. Estudio exploratorio con análisis temático cualitativo, basado en aspectos conceptuales del cuidado y derecho a la salud, a través de entrevistas con 14 enfermeros que trabajan en la Estrategia de Salud Familiar. Narrativas muestran las medidas de protección de la salud infantil, organizada por temas: Observación e intervención para el cuidado del niño en el hogar; Incautación de situaciones de violación de derechos; La vulnerabilidad en la infancia con padres usuarios de alcohol y otras drogas. La visita domiciliaria es una herramienta esencial de la práctica clínica en la atención primaria de salud, que constituye un espacio privilegiado para los cuidados de enfermería al niño y al contexto familiar en la defensa de la salud infantil.

  8. Em defesa de uma certa Enfermidade: Cuidados Paliativos em Debate / In defense of a certain Disease: Palliative Care in Debate

    Directory of Open Access Journals (Sweden)

    Maria Vilela Pinto Nakasu

    2013-12-01

    Full Text Available Falar de Cuidados Paliativos é falar da finitude da vida, do alívio da dor, de ações voltadas ao cuidado integral do paciente e sua família. É igualmente falar de eutanásia, ortotanásia e, mais recentemente, de ortotanásia ativa. Falar de Cuidados Paliativos é situar a espiritualidade e a qualidade de vida e qualidade de morte como elementos fundamentais. 1-3 O campo dos Cuidados Paliativos não se limita, contudo, à esfera técnica da medicina com seus recursos farmacológicos para o alívio da dor. Este campo não se limita tampouco ao apoio psicológico de aceitação da condição de saúde, e dos lutos implicados em um processo de adoecimento e morte. Apesar de incluir a assistência espiritual no rol de suas prioridades, os Cuidados Paliativos também parecem ir muito além dela. 1-3 São numerosas as disciplinas que compõem o que se tem chamado de Filosofia dos Cuidados Paliativos, muito embora a expressão “filosofia” poderia facilmente ser substituída por “princípios”. No entanto, falar em Cuidados Paliativos não é simplesmente reunir em um grande balaio a medicina voltada a estados de terminalidade, a psicologia, a assistência espiritual e todos os equipamentos e estruturas operacionais das quais o doente depende para se manter vivo. Para além de seu viés propriamente clínico e assistencial, temas como a bioética, modelos normativos do atual paradigma da medicina, bem como a filiação deste modelo à estrutura econômica e cultural vigente no capitalismo tardio são caros aos princípios dos Cuidados Paliativos.4-7 Este trabalho examina a concepção ontológica de ser humano em sua dualidade corpo/mente em relação a qual a medicina moderna se apoia para intervir. Num segundo momento, discute o conceito de “Política de Saúde” segundo a acepção da filósofa Agnes Heller (1995. Encerra problematizando algumas questões caras ao campo dos Cuidados Paliativos referentes ao contexto social no qual este campo do conhecimento está inserido.

  9. The Conference on the Dynamics of Molecular Collisions Held at Snowbird, Utah on 14-19 July 1985.

    Science.gov (United States)

    1985-07-01

    Berkeley Lab. (701) 237-8906 Berkeley, CA 94720 S(415) 486-6 4 47 Dr. F. Borondo Dept. de Quimica Fisica y Quimica CuanticA Dr. Frank Budenholzer...F. Martin and M. Yaez. Departamento de Quimica Fisica y Quimica Cudntica Facultad de Ciencias. C-XIV. Universidad Aut6noma de Madrid. Cantoblanco

  10. Constraints on the Grueneisen Theory

    Science.gov (United States)

    2007-02-01

    TOMSK 634024 RUSSIA 5 DEPARTMENTO DE QUIMICA FISICA I FACULTAD DE CIENCIAS QUIMICAS UNIVERSIDAD COMPLUTENSE DE MADRID V G BAONZA...OVIEDO FACULTAD DE QUIMICA DEPARTMENTO DE QUIMICA FISICA Y ANALITICA E FRANCISCO AVENIDA JULIAN CLAVERIA S/N 33006 - OVIEDO

  11. A Note on the Application of the Extended Bernoulli Equation

    Science.gov (United States)

    1999-02-01

    SANTANDER SPAIN DEPARTMENTO DE QUIMICA FISICA FACULTAD DE CIENCIAS QUIMICAS UNIVERSIDAD COMPLUTENSE DE MADRID V G BAONZA M TARAVTLLO M CACERAS...UNIVERSIDAD DE OVIEDO FACULTAD DE QUIMICA DEPARTMENTO DE QUIMICA FISICA Y ANALITICA E FRANCISCO AVENIDA JULIAN CLAVERIA S/N 33006 - OVIEDO SPAIN

  12. International Conference on the Organometallic and Coordination Chemistry of Germanium, Tin and Lead (6th) Held in Brussels, Belgium on July 23-28, 1989

    Science.gov (United States)

    1989-07-28

    Molybdenumý-Tn and Molybdenum-M~ercury Bonds P08 Tudela. David Departamento de Quimica (C-VIII), Universidad Aut6noma de Madrid, 28049 Madrid, Spain The...Departamento de Quimica Inorgfnica. Facultad de QuImicas . Universidad Complutense de Madrid. Madrid, 28040. SPAIN. Previously it has been shown that...University ot New York at Albany Albany, NY 12222, USA Camipo Santillana, Jose Antonio, Mr. Dpto Quimica Inorganica, Pac. CC. Quimicas Universidad

  13. Sequential chemical extraction of heavy metals in a study of the chemical alteration of mine tailings at Ticapampa (Huaraz, Peru); Extraccion quimica secuencial de metales pesados en el estudio de alteracion quimica de relaves de mina en Ticapampa (Huaraz, Peru)

    Energy Technology Data Exchange (ETDEWEB)

    Jara Facundo, M. A.

    2011-07-01

    The upper reaches of the Rio Santa (Huaraz, Peru) are highly affected by the mining activities of generally small and very small mining companies located in two specific areas, Cordillera Blanca, and Cordillera Negra, with the largest mining claims located in the districts of Recuay and Ticapampa. To assess the mobility and bioavailability of heavy metals in the abandoned tailings pond belonging to the Alianza mining company in the district of Ticapampa, and to identify the fractions to which they are associated we applied a sequential chemical extraction. The results were compared with studies into their mineralogical characterization, a quantitative chemical analysis and a determination of potential acidity and potential neutralization by the ABA (acid-base accounting) method applied to samples of tailings. The sequential extraction procedure confirmed the mode of general alteration observed in the area through mineralogical studies: a relatively easy mobility of Pb, and Cd, and considerable immobility with regard to Ag, Cr and Co, as well as an intermediate mobility of Cu, Zn, and As. Significant cadmium and lead contents found in the most mobile fractions of the tailings may represent an environmental threat, bearing in mind the toxic nature of these elements. Despite the low mobility of arsenic, the total quantities of this element are so high that the waters of the Rio Santa are being affected. (Author) 22 refs.

  14. Chemical and physicochemical characterization of vermicompost from bovine manure and evaluation of competitive adsorption of cadmium and lead; Caracterizacao quimica e fisico-quimica de vermicomposto de esterco bovino e avaliacao da adsorcao competitiva por cadmio e chumbo

    Energy Technology Data Exchange (ETDEWEB)

    Lamim, Soraida Sozzi Miguel [Juiz de Fora Univ., MG (Brazil). Dept. de Quimica; Jordao, Claudio Pereira; Brune, Walter; Pereira, Jose Luis [Vicosa Univ., MG (Brazil). Dept. de Quimica

    1996-09-01

    The chemical and physicochemical characterization of vermicompost from bovine manure has been studied. It was examined the pH and cation exchangeable capacity (CTC), moistness, ash, organic carbon, total nitrogen, lignin, cellulose and metal concentrations, among other characteristics. The vermicompost was then applied to the retention and competition of metal pollutants (Cd and Pb) from metal nitrate solutions. The retention was affected by both the pH and time of adsorption, while the competitive character of these metals for the substrate was not relevant to each pH examined. (author) 46 refs., 4 figs., 7 tabs.

  15. 24. Annual meeting of the Brazilian Chemical Society. Chemistry in Latin America: integration and sustainable development. Book of Abstracts; 24. Reuniao anual da Sociedade Brasileira de Quimica. A quimica na America Latina: integracao e desenvolvimento sustentavel. Livro de Resumos

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    Some works about chemical synthesis, utilization of rare earths elements and the use of electrochemical analysis are show. Spectroscopic studies of complexes and organic composition of new chemical compounds are discussed. Structural studies aiming identification of recent natural products and preparation of compounds and metal complexes using nuclear magnetic resonance, X- ray diffraction and fluorescence methods are show. Some experimental and theoretical approach aiming results of level of accuracy on the news natural compounds, as well as aspects on environmental chemistry are presented.

  16. Forecast of physicochemical properties and chemical composition of gasoline from infrared spectra, using multivariate calibration; Previsao de propriedades fisico-quimicas e composicao quimica da gasolina a partir de espectros infravermelhos, utilizando calibracao multivariada

    Energy Technology Data Exchange (ETDEWEB)

    Cocco, Lilian Cristina; Yamamoto, Carlos Itsuo [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Lab. de Analise de Combustiveis Automotivos (LACAUTets)

    2008-07-01

    This work describes the attainment of mathematical models, applying multivariate calibration in infrared spectrum with ATR, from 128 gasoline samples with diverse chemical compositions, collected in a period of two and a half years. Infrared spectra had been used to assemble the input matrix for the modeling, whereas the standardized assays and gaseous chromatography had supplied the output matrices. Ninety samples were been used for training and 38 for testing. In order to calibrate chemical composition from chromatography, the techniques of mass spectrometry and chemical ionization were used to identify unknown substances and improve the fitting of the mathematical models. Two hundred and ninety substances were detected and identified, from which 100 were unknown. Six PLS/PCR models were attained to predict some properties as specific mass, Reid vapor pressure, T10, T50, T90 and PFE from distillation curve. Another six PLS/PCR models were attained to predict the amount of aromatics, paraffins, isoparaffins, naphthenes, olefins and oxygenates. In general, mathematical models were attained with good training fit, with correlation coefficients higher than 0,975 (T10) and reaching a maximum of 0,998 (naphthenes) and they are able to forecast an average chemical percentage and properties of interest from gasoline, with acceptable prediction errors. (author)

  17. Calculation of absorbed dose in water by chemical Fricke dosimetry; Calculo de dose absorvida na agua por dosimetria quimica Fricke

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Adenilson Paiva, E-mail: adenilson-fisica@hotmail.com.br [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil); Meireles, Ramiro Conceicao [Fundacao do Cancer, Rio de Janeiro, RJ (Brazil)

    2016-07-01

    This work is the result of a laboratory activity performed in Radiological Sciences Laboratory (CRL), linked to the State University of Rio de Janeiro (UERJ). This practice aimed to determine the absorbed dose to water, through the primary calibration method called dosimetry Fricke, which consists of ferrous ions (Fe + 2) to ferric (Fe + 3), generated by water radiolysis products which is the structural change of water molecule caused by ionizing radiation. A spectrophotometer was used to extract data for analysis at a wavelength (λ) 304 and 224 nm with function of measuring the absorbance using bottles with irradiated and nonirradiated Fricke solution. (author)

  18. VARIABILIDAD Y RELACION ENTRE LAS PROPIEDADES ANATOMICAS, QUIMICAS Y LA APTITUD PULPABLE, EN CLONES DE EUCALYPTUS GLOBULUS.

    OpenAIRE

    RAMIREZ VIDAL, MAURICIO HERNAN; RAMIREZ VIDAL, MAURICIO HERNAN

    2008-01-01

    Se estudió la variación de la anatomía de la madera, variables biornétricas, aptitud pulpable y propiedades de la pulpa, en 14 clones de E. globulus de 7 años de edad, creciendo en un ensayo clonal en la zona de Arauco, región del Bio-Bio, Chile. Las Cara 61p.

  19. Efectos del procedimiento de extraccion en la organizacion estructural y composicion quimica de la matriz nuclear en plantas.

    OpenAIRE

    Cerezuela Rosique, María Angeles

    1991-01-01

    La matriz nuclear es una estructura núcleoesquel&ica ampliamente estudiada en sistemas animales, pero apenas existen trabajos que aborden el tema en sistemas vegetales, que poseen diferencias acusadas en la organización del citoesqueleto respecto a las células animales. Para profundizar en el conocimiento sobre el nucleoesqueleto y la matriz nuclear de plantas, hemos realizado un análisis de su organización ultraestructural, composición pohpeptídica y localización de ácidos ...

  20. ESTUDO DA ESTABILIDADE MICROBIOLOGICA E FISICO-QUIMICA DE POLPA DE CUPUAÇU DESIDRATADA EM ESTUFA

    Directory of Open Access Journals (Sweden)

    JULIANA DA SILVA DE ABREU MOREIRA

    2011-01-01

    moulds, all for triplicats. The results showed significant effect of interaction between dehydration time and storage to variables ºBrix and ascorbic acid. The water activity and the pH kept stable during all the period of storage, while the level of ascorbic acid reduces by the dehydration time and storage. The dehydration of in natura cupuaçu pulp in conventional oven is a practicable method of conservation and storage for 90 days.

  1. Chemical characterisation of zircon-cadmium sulfoselenide ceramic pigments; Caracterizacion quimica de pigmentos ceramicos a base de sulfoseleniuro de cadmio

    Energy Technology Data Exchange (ETDEWEB)

    Gazulla Barreda, M. F.; Rodrigo Edo, M.; Blasco Roca, E.; Orduna Cordero, M.

    2013-07-01

    The present paper addresses the development of a methodology that allows the complete chemical characterisation of zircon cadmium sulfoselenide ceramic pigments including minor and major elements. To develop the methodology, five zircon-cadmium sulfoselenide pigments with different hues were selected, studying the different measurement process steps, from sample preparation to the optimisation of the measurement of the different components of the pigments by spectroscopic techniques (WD-XRF and elemental analysis by combustion and IR detection). The chemical characterisation method developed was validated with synthetic standards prepared from the mixture of certified reference materials and pure oxides because no certified referenced materials of this type of pigments were commercially available. The developed method can be used for a complete chemical characterization of zircon-cadmium sulfoselenide ceramic pigments with a very low uncertainty for all the elements analysed. (Author)

  2. EVALUACIÓN QUIMICA DE LA FIBRA EN SEMILLA, PULPA Y CÁSCARA DE TRES VARIEDADES DE AGUACATE

    Directory of Open Access Journals (Sweden)

    ADELA MARÍA CEBALLOS P

    Full Text Available El sector agropecuario colombiano requiere integrarse al sector agroindustrial para aumentarle valor a sus productos y residuos. Utilizar residuos agrícolas y agroindustriales como materias primas para obtener metabolitos secundarios es tema de interés en investigación y busca dar respuestas al uso de esos residuos, mediante desarrollo de tecnologías aplicables al entorno colombiano. Se valoraron cáscara, semilla y pulpa de aguacate variedades Booth8, Trinidad y Papelillo en estados de madurez fisiológica (MF y consumo (MC. Se hizo caracterización bromatológica, contenido de fibra como carbohidratos solubles (CHOS, lignina LG, celulosa y hemicelulosa (CEL y HEMICEL y fibra bruta (FB según (Tappi Methods 1993, 1998, AOAC, 2001. Los resultados fueron analizados mediante ANOVA (P < 0,05 utilizando SAS V9.1. Los CHOS en los dos estados de madurez y para las tres variedades variaron entre 12-38% cáscara, 20-35% pulpa y 17-35% semilla; CEL y HEMICEL 8-50% cáscara, 7-26% pulpa, 1-5% semilla, los cuales pueden ser útiles como complementos de procesos biotecnológicos. La pulpa de las tres variedades tiene alto valor nutricional por sus contenidos de proteína, fibra y minerales. La composición de la cáscara y semilla podrían ser importantes para suplementos de dieta animal o como recuperador de suelos para la producción agrícola

  3. Chemical and colour quenching in liquid scintillation counting; Estudio de la extincion quimica y por color en centelleo liquido

    Energy Technology Data Exchange (ETDEWEB)

    Scott, P E; Grau, A

    1987-07-01

    Chemical and colour quenching for H-3 and C-14 was studied. The method includes spectral analysis of colouring agents; methyl red, (4'-dimethylamine-azobenzene 2-carboxylic acid) dimethyl yellow (4'-dimethylamine-azobenzene) and malachite green (methane, bis .(4-dimethyl aminophenyl) - (phenyl)). External standard channels ratio was applied for the liquid scintillation counting of samples. The introduction of an isolated external standard seems to be a strong tool for the correction of chemical and colour quenching curves. (Author) 12 refs.

  4. Chemical and colour quenching in liquid scintillation counting; Estudio de la extincion quimica y por color en centelleo liquido

    Energy Technology Data Exchange (ETDEWEB)

    Scott, P. E.; Grau, A.

    1987-07-01

    Chemical and colour quenching for H-3 and C-14 was studied. The method includes spectral analysis of colouring agents; methyl red, (4'-dimethylamine-azobenzene 2-carboxylic acid) dimethyl yellow (4'-dimethylamine-azobenzene) and malachite green (methane, bis .(4-dimethyl aminophenyl) - (phenyl)). External standard channels ratio was applied for the liquid scintillation counting of samples. The introduction of an isolated external standard seems to be a strong tool for the correction of chemical and colour quenching curves. (Author) 12 refs.

  5. COMPOSICIÓN QUIMICA Y ACTIVIDAD ANTIFOULING DE LA FRACCION LIPIDICA DE LA ESPONJA MARINA Cliona tenuis (Clionidae

    Directory of Open Access Journals (Sweden)

    Leonardo Castellanos

    2009-04-01

    Full Text Available Normal 0 21 false false false st1\\:*{behavior:url(#ieooui } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Del extracto orgánico de la esponja marina Cliona tenuis, recolectada en las Islas del Rosario (Colombia, Mar Caribe, fue obtenida la fracción lipídica, la cual presentó propiedades antifouling en pruebas en campo. Esta fracción fue separada por CC sobre gel de sílice hasta obtener fracciones de ésteres metílicos, glicéridos, glicolípidos, fosfolípidos y ácidos grasos libres, las cuales fueron identificadas por CCD y técnicas de dereplicación (RMN 1H y 13C. Posteriormente, las fracciones de glicéridos, glicolípidos y fosfolípidos fueron hidrolizadas y los ácidos obtenidos, junto con los provenientes de la fracción de ácidos grasos libres, fueron transformados en ésteres metílicos y todos se analizaron por CGAR-EM. Para ubicar las insaturaciones y ramificaciones, los ésteres metílicos se transformaron luego en sus correspondientes pirrolididas, las cuales también se analizaron por CGAR-EM. El estudio cromatográfico (valores de ECL y de los espectros de masas de los ésteres metílicos y de sus derivados pirrolididas permitió identificar 81 ácidos grasos diferentes, de los cuales no habían sido previamente reportados: los ácidos 4,8-hexadecadienoico, 11-metil-4,10-octadecadienoico, 6,9,12,14-icosatetraenoico, y 6,9,12,14,17-icosapentanoico.

  6. Chemical analysis of superconductor material by Rietveld method; Analise quimica de material superconductor atraves do metodo de Rietveld

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Junior, E.S.; Gomes Junior, G.G.; Ogasawara, T., E-mail: georges@metalmat.ufrj.b [Universidade Federal do Rio de Janeiro (COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Dept. de Eng. Metalurgica e Materiais; Bispo, E.R.; Polasek, A. [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil); Amorim, H.S. [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica

    2010-07-01

    Among the main superconducting systems, the system Bi-Sr-Ca-Cu-O is extremely important because it presents two stages of high superconducting critical temperature. To manufacture samples of the superconducting phase (Bi, Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}Ox (Bi-2223) were used oxides and carbonates of high purity. The mixture was calcined and sintered for 100-200h in air. To characterize the material we used X-ray diffraction, SEM / EDS and measurement of critical temperature (Tc). The Rietveld method was used for structure refinement, and quantification of phases and to estimate the chemical composition of samples in order to obtain greater control of chemical composition using only the data of X-ray diffraction. The results were compared with the refinement results of X-ray fluorescence and was observed a discrepancy of about 8%. This result indicates that the Rietveld method can be an interesting alternative to perform chemical analysis. (author)

  7. Influence of iodine chemistry on source term assessment; Influencia de la quimica del yodo en la estimacion del termino fuente

    Energy Technology Data Exchange (ETDEWEB)

    Herranz Puebla, L E; Lopez Diez, I; Rodriguez Maroto, J J; Martinez Lopez-Alcorocho, A

    1991-07-01

    The major goal of a phenomenology analysis of containment during a severe accident situation can be spitted into the following ones: to know the containment response to the different loads and to predict accurately the fission product and aerosol behavior. In this report, the main results coming from the study of a hypothetical accident scenario, based on LA-4 experiment of LACE project, are presented. In order to do it, several codes have been coupled: CONTEMPT4/MOD5 (thermohydraulics), NAUA/MOD5 (aerosol physics) and IODE (iodine chemistry). It has been demonstrated the impossibility of assessing with confidence the Source Term if the chemical conduct of some radionuclides is not taken into account. In particular, the influence on the iodine retention efficiency of the sump of variables such as pH has been proven. (Author)12 refs.

  8. Radiation chemical dosimetry by means of nitrate-nitrite; Dosimetria quimica de la radiacion aplicacion del sistema nitrato-nitrito

    Energy Technology Data Exchange (ETDEWEB)

    Tormo Ferrero, M J

    1977-07-01

    The different chemical systems used in dosimetry and the selection criteria for them are described. The general topics in dosimetry with alkali nitrates as well as the phenomena occurring in their radiolysis are also treated. The possibility of application in dosimetric areas useful in radiosterilization and industrial processes is studied too. (Author) 22 refs.

  9. Chemical vapor deposition (CVD) of uranium for alpha spectrometry; Deposicion quimica de vapor (CVD) de uranio para espectrometria alfa

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez V, M. L.; Rios M, C.; Ramirez O, J.; Davila R, J. I.; Mireles G, F., E-mail: luisalawliet@gmail.com [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico)

    2015-09-15

    The uranium determination through radiometric techniques as alpha spectrometry requires for its proper analysis, preparation methods of the source to analyze and procedures for the deposit of this on a surface or substrate. Given the characteristics of alpha particles (small penetration distance and great loss of energy during their journey or its interaction with the matter), is important to ensure that the prepared sources are thin, to avoid problems of self-absorption. The routine methods used for this are the cathodic electro deposition and the direct evaporation, among others. In this paper the use of technique of chemical vapor deposition (CVD) for the preparation of uranium sources is investigated; because by this, is possible to obtain thin films (much thinner than those resulting from electro deposition or evaporation) on a substrate and comprises reacting a precursor with a gas, which in turn serves as a carrier of the reaction products to achieve deposition. Preliminary results of the chemical vapor deposition of uranium are presented, synthesizing and using as precursor molecule the uranyl acetylacetonate, using oxygen as carrier gas for the deposition reaction on a glass substrate. The uranium films obtained were found suitable for alpha spectrometry. The variables taken into account were the precursor sublimation temperatures and deposition temperature, the reaction time and the type and flow of carrier gas. Of the investigated conditions, two depositions with encouraging results that can serve as reference for further work to improve the technique presented here were selected. Alpha spectra obtained for these depositions and the characterization of the representative samples by scanning electron microscopy and X-ray diffraction are also presented. (Author)

  10. Drogas na adolescencia : analise do uso de substancia quimicas entre adolescentes estudantes de escolas publicas e particulares de Campinas, SP

    OpenAIRE

    Maria Alice de Araujo Armani

    2007-01-01

    Resumo: Objetivo: Pesquisar, entre adolescentes de diferentes níveis sócio-culturais, estudantes de escolas públicas e privadas, uso de medicações específicas (fórmulas laboratoriais que visam emagrecimento, inibidores do apetite, ?orlistat?, anabólicos e esteróides, laxantes, diuréticos), tabagismo, consumo de bebidas alcoólicas, início de vida sexual, prevenção de gestações e DST e utilização de métodos anticoncepcionais. Métodos: Foi realizada uma pesquisa entre adolescentes estudantes do...

  11. Chemistry characterization and samples beryllium process impurity determination; Caracterizacao quimica e determinacao de impurezas de amostras de processo de berilio

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Leonel Mathry de

    1992-12-01

    Brazil is the greatest world producer of beryl (3 Be O.Al{sub 2}O{sub 3}.6SiO{sub 2}) and has recently begun to produce beryllium compounds by means of a pilot plant constructed at Governador Valadares city (Minas Gerais - Brazil). The aim of this work was the determination of trace level impurities and macro constituents in the tenth % range to support analytical control process of plant production and characterization of beryllium compounds. The impurities separations and purification process was developed by two steps procedure. The first one using EDTA complexation has separated and reduced some impurities to less than 1 {mu}g/ml level. In the second one it was used a chelating resin (Chelex 100) and the separation efficiency was about 75 to 97 % related with the element tested. High pure berylium oxide standard was obtained from purification of Be(OH)2. The R X fluorescence presented only traces of Cu and Si < 1 % Fe and Mn, Zn, Ca, Al, Na and S were completely removed. The beryllium content was determined by direct atomic emission spectroscopy in argon plasma (Dcp) and compared with classic gravimetric method as Be O. The results were in agreement (49,2+/-0,2 % and 48,3+/-0,1 % respectively) between 95 % of confidence. A low temperature gravimetric method for beryllium determination was also studied using Oxine with microwave furnace. A total of 24 elements including macro and trace level were determined by Dcp and/or spectrophotometric methods. The Be/B separation was studied using anionic resin in poly alcohols medium. A more detailed study of equilibrium conditions is necessary. This work was realized at Laboratorio de Analise Mineral (LAM) of Comissao Nacional de Energia Nuclear - Rio de Janeiro (CNEN). (author)

  12. Physico-chemical evaluation of radiation effects on apple juice; Avaliacao fisico-quimica do suco de maca irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Blumer, Lucimara; Domarco, Rachel E.; Spoto, Maria H.F.; Walder, Julio M.M.; Matraia, Clarice [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil)

    1997-12-01

    Gala and Fuji varieties apple`s juice were clarified with enzyme and irradiated aiming to extend the shelf-life without conservants and chemical additives. The juices were analysed for soluble solids, titrable acidity, pH and color. Results showed effect of storage periods in soluble solids, pH and color. The variety and storage period modified the titrable acidity. The pH was altered by irradiation dose and the storage period. (author). 9 refs., 6 figs.

  13. Implementation perspective of a Radiological Agent Identification Laboratory - LIAR at CTEx

    International Nuclear Information System (INIS)

    Santos, Avelino; Silva, Jorge A.V.; Oliveira, Luciano S.R.; Vilela, Paulo R.T.

    2011-01-01

    Radiometric analysis at Centro Tecnologico do Exercito, CTEx, have been performed since 1980s, to be applied in the course of pre-operational and operational stages of a subcritical nuclear assembly which was set up into the extinct Instituto de Pesquisas Especiais, IPE. In that time, monitoring, that were based in analytical techniques of gamma spectrometry and total alpha/beta counting, were performed. Nowadays, the aptness of identify radiological and nuclear agents in environmental samples is a deficiency of Division of Defesa Quimica, Biologica e Nuclear, DDQBN, which is legatee of IPE nuclear duty. With the implementation of Laboratorio de Identificacao de Agentes Radiologicos, LIAR, the obsolescence of DDQBN equipment is been solved by the acquisition of modern spectroscopy systems which are supposed able to analyze CTEx environmental matrix samples, according to specific CNEN standard, as well as to perform works that concern diverse activities on civil defense, security, scientific advisory, research, and foreign trade areas. So, this work describes the implementation of LIAR at DDQBN of CTEx and analyses perspectives of its use. Basic functionality, stage of implementation, systems and analytical techniques are described. Finally, the work considers the importance and the foreseen outcomes of LIAR implementation on scientific, technological, economic, social and environmental areas. (author)

  14. Implementation perspective of a Radiological Agent Identification Laboratory - LIAR at CTEx

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Avelino; Silva, Jorge A.V.; Oliveira, Luciano S.R.; Vilela, Paulo R.T., E-mail: avelino@ctex.eb.br, E-mail: jalberto@ctex.eb.br, E-mail: luciano@ctex.eb.br, E-mail: pauloric@ctex.eb.br [Centro Tecnologico do Exercito (DDQBN/CTEx), Rio de Janeiro, RJ (Brazil). Div. de Defesa Quimica, Biologica e Nuclear

    2011-07-01

    Radiometric analysis at Centro Tecnologico do Exercito, CTEx, have been performed since 1980s, to be applied in the course of pre-operational and operational stages of a subcritical nuclear assembly which was set up into the extinct Instituto de Pesquisas Especiais, IPE. In that time, monitoring, that were based in analytical techniques of gamma spectrometry and total alpha/beta counting, were performed. Nowadays, the aptness of identify radiological and nuclear agents in environmental samples is a deficiency of Division of Defesa Quimica, Biologica e Nuclear, DDQBN, which is legatee of IPE nuclear duty. With the implementation of Laboratorio de Identificacao de Agentes Radiologicos, LIAR, the obsolescence of DDQBN equipment is been solved by the acquisition of modern spectroscopy systems which are supposed able to analyze CTEx environmental matrix samples, according to specific CNEN standard, as well as to perform works that concern diverse activities on civil defense, security, scientific advisory, research, and foreign trade areas. So, this work describes the implementation of LIAR at DDQBN of CTEx and analyses perspectives of its use. Basic functionality, stage of implementation, systems and analytical techniques are described. Finally, the work considers the importance and the foreseen outcomes of LIAR implementation on scientific, technological, economic, social and environmental areas. (author)

  15. A defesa costeira do litoral de Sintra-Cascais durante o Garb al-Ândalus : I – Em torno do porto de Colares

    Directory of Open Access Journals (Sweden)

    Marco Oliveira Borges

    2012-01-01

    Full Text Available In this study we will mostly focus on the coastal defence developed from Sintra during the Islamic occupation of the Iberian Peninsula, certainly intensified after the Viking attack of 844. However, special attention will be given to the Colares River to try to understand if it has ever operated as a port to the Muslim population of Sintra before its siltation

  16. Em defesa da pátria: proteção social, infância e maternidade no Estado Novo.

    Directory of Open Access Journals (Sweden)

    Elizangela Barbosa Cardoso

    2015-06-01

    Full Text Available O artigo aborda a implantação de políticas de saúde pública, em Teresina (PI, durante o Estado Novo, dentre elas, o programa de proteção materno-infantil. Destaca, nesse processo, a aliança entre o poder público e a sociedade civil pela proteção social da infância. Evidencia, ainda, o crescimento da intervenção médica sobre a maternidade e as ações empreendidas para redefinir as práticas de maternagem, através da difusão de noções de higiene e de puericultura.

  17. Métodos e factores de análise às ameaças à Segurança e à Defesa Nacional

    OpenAIRE

    Rocha, João

    2005-01-01

    Combater novas ameaças assimétricas como o terrorismo, o crime organizado e a lavagem de dinheiro, requer um sistema de Informações ágil que actue de forma activa e que faça uso das mais avançadas tecnologias de informação e comunicação. Neste trabalho apresentamos as profundas alterações ocorridas no contexto estratégico internacional e a emergência de novas ameaças. O colapso do Pacto de Varsóvia equipara-se, no surgimento de novas ameaças, à abertura da caixa de Pandora, ...

  18. Ação da inoculação de hemolinfa no mecanismo de defesa de Biomphalaria tenagophila (Orbigny, 1835

    Directory of Open Access Journals (Sweden)

    Reis Soely Maria Pissini Machado

    1995-01-01

    Full Text Available Estudou-se a resistência à infecção pelo S. mansoni em moluscos B. tenagophila inoculados com vários tipos de hemolinfa provenientes de moluscos infectados por S. mansoni da linhagem SJ ou por outros trematódeos avaliando-se, nestas circunstâncias, o comportamento dos amebócitos. Concluiu-se que dois tipos de mecanismos teriam agido provocando resistência à infecção pelo S. mansoni: celular e humoral. A reação do tipo celular ocorreu quando os moluscos eram inoculados com hemolinfa de moluscos infectados por S. mansoni B. tenagophila inoculadas com hemolinfa de moluscos infectados por furcocercárias longifurcadas sem ocelos, apresentaram elevada resistência à infecção posterior por S.mansoni.

  19. Ação da inoculação de hemolinfa no mecanismo de defesa de Biomphalaria tenagophila (Orbigny, 1835

    Directory of Open Access Journals (Sweden)

    Soely Maria Pissini Machado Reis

    1995-08-01

    Full Text Available Estudou-se a resistência à infecção pelo S. mansoni em moluscos B. tenagophila inoculados com vários tipos de hemolinfa provenientes de moluscos infectados por S. mansoni da linhagem SJ ou por outros trematódeos avaliando-se, nestas circunstâncias, o comportamento dos amebócitos. Concluiu-se que dois tipos de mecanismos teriam agido provocando resistência à infecção pelo S. mansoni: celular e humoral. A reação do tipo celular ocorreu quando os moluscos eram inoculados com hemolinfa de moluscos infectados por S. mansoni B. tenagophila inoculadas com hemolinfa de moluscos infectados por furcocercárias longifurcadas sem ocelos, apresentaram elevada resistência à infecção posterior por S.mansoni.

  20. A SOCIEDADE CIVIL PODE MUDAR O JORNALISMO? A experiência do jornalismo de defesa civil na América Latina

    Directory of Open Access Journals (Sweden)

    Silvio Waisbord

    2009-06-01

    Full Text Available Após estudos recentes sobre a “teoria do campo” e o “institucionalismo novo” nos estudos sobre jornalismo (Benson, 2004, 2006, a premissa inicial deste artigo é que a imprensa mantém vínculos com três campos externos: os estados, os mercados e a sociedade civil. Os vínculos são formados tanto pelas relações estruturais quanto pelas práticas de fazer notícias. Os fatores estruturais como propriedade, financiamento e legislação determinam as conexões das organizações noticiosas com os estados, as empresas e os protagonistas civis. Os processos de produção e consumo de notícias envolvendo as redações, as fontes e as audiências afetam também a intensidade das relações entre a imprensa e os campos externos.

  1. Em defesa do filosofar e do historicizar conceitos científicos - Supporting the philosophizing and the historicity of scientific concepts

    Directory of Open Access Journals (Sweden)

    Rochele de Quadros Loguercio, José Cláudio Del Pino

    2011-04-01

    Full Text Available Resumo Neste artigo, evidenciam-se alguns de nossos entendimentos sobre a utilização da História e da Filosofia da Ciência nas salas de aula de química tanto na escola básica quanto na formação inicial e continuada de professores. Pretende ser uma introdução de questionamentos nossos e de outros autores que trabalham com o ensino de química e ciências, bem como, um primeiro texto sobre as formas de trazer o conhecimento conceitual, histórico e filosófico para a sala de aula através da valorização do aluno, seus interesses e o ensino de química, buscando recuperar seu caráter narrativo e social. Palavras-chave: história e filosofia da ciência; aula de química.   SUPPORTING THE PHILOSOPHIZING AND THE HISTORICITY OF SCIENTIFIC CONCEPTS Abstract This paper presents our understanding about History and Philosophy of Science in the chemistry classroom, both in school and in the initial and continuing teachers education. In this sense, this paper intends to: introduce questionings held by the author of this study and by other authors involved in chemistry and sciences teaching; and be a first insight on bringing the conceptual, historical end philosophical knowledge to the classroom taking into account the student's interests and the teaching of chemistry, aiming to retrieve its narrative and social characteristics. Keywords: history and philosophy of science; chemistry class.   EN DEFENSA DEL FILOSOFAR Y DEL HISTORIAR: CONCEPTOS CIENTÍFICOS Resumen En este artículo, se evidencian algunos de nuestras comprensiones sobre la utilización de la Historia y de la Filosofía de la Ciencia en las aulas de química tanto en la escuela básica cuanto en la formación inicial y continuada de profesores. Pretende ser una introducción de cuestionamientos nuestros y de otros autores que trabajan con la enseñanza de química y ciencias, bien como, un primero texto sobre las formas de traer el conocimiento conceptual, histórico y filosófico para la clase a través de la valorización del alumno, sus intereses y la enseñanza de química, buscando recuperar su carácter narrativo y social. Palabras-clave: historia y filosofía de la ciencia; aulas de química.

  2. O Brasil e a cooperação em defesa: a construção de uma identidade regional no Atlântico Sul

    Directory of Open Access Journals (Sweden)

    Adriana Erthal Abdenur

    2014-01-01

    Full Text Available O artigo analisa a cooperação que o Brasil vem desenvolvendo ao longo do Atlântico Sul, mostrando que o País vem desempenhando o papel de region-builder na construção de uma identidade sul-atlântica com posição de destaque para si. Tais esforços começam a ser contestados por outros atores de dentro e fora da região.

  3. Quando o ataque é a melhor defesa: interrogatórios políticos da Oban e do DOI-CODI

    Directory of Open Access Journals (Sweden)

    Mariana Joffily

    2009-12-01

    Full Text Available Nos anos 1960 e 1970, no Brasil, as Forças Armadas envolveram-se na repressão política sob inspiração da doutrina de Segurança Nacional e do pensamento militar francês sobre a Guerra Revolucionária. Segundo essas teorias, o novo tipo de guerra, que combinava operações bélicas e propaganda política, exigia não apenas um firme combate das Forças Armadas e da polícia, como o pleno conhecimento das técnicas e táticas do inimigo, o que se fazia por meio de rigoroso controle de informações. Grande parte dessas informações foi obtida através de interrogatórios, sob tortura, de presos políticos. A problemática desse artigo gira em torno dos temas desses interrogatórios, bem como do uso provável dos dados recolhidos. Pode-se dizer, grosso modo, que serviram em três frentes de atuação: localizar o inimigo, conhecer a estrutura e modus operandi de suas organizações e avaliar o grau de envolvimento dos militantes em atividades de cunho político.

  4. AssociaÃÃes Entre Temperamentos Afetivos E Emocionais, Estilos De Defesa E ManifestaÃÃo PsicopatolÃgica Em Uma Grande Amostra"

    OpenAIRE

    Tauily Claussen D'Escragnolle Taunay

    2014-01-01

    s temperamentos afetivos podem ser considerados a base para o humor, o comportamento e a personalidade, alÃm de manifestaÃÃes subclÃnicas hereditÃrias de transtornos do humor. Recentemente, foi proposto um modelo de temperamento que avalia simultaneamente os temperamentos afetivos e emocionais em uma tentativa de integrar os modelos de temperamento emocional de Cloninger e de temperamentos afetivos de Kraepelin/Kretschmer/Akiskal. De acordo este modelo, existem 12 tipos de temperamentos afeti...

  5. O recrutamento militar na América Portuguesa: o esforço conjunto para a defesa da Colônia do Sacramento (1735-1737

    Directory of Open Access Journals (Sweden)

    Paulo César Possamai

    2004-12-01

    Full Text Available In their effort to defend the Colônia de Sacramento, besieged by the Spanish from October 1735 to September 1737, the Portuguese Crown ordered the mobilization of all human and material resources available in the State of Brazil. This article examines the compulsory recruitment that occurred on this occasion and discusses the living conditions of those men who were taken by force from their homes to be sent to the River Platte area, from where few would return.

  6. O paradigma dos novos movimentos sociais para a defesa dos direitos da criança e do adolescente – breves análises

    OpenAIRE

    Caldas, Paula da Silva; UNIABEU

    2012-01-01

    This article aims to bring up the debate about the paradigm that has been built taking into consideration the new social movements in defense of the rights of children and adolescents in the contemporary scene, bringing the backdrop of the implementation of important spaces coordination, participation, deliberation and mobilization of civil society in an attempt to execution of public policies for children and youth. O presente artigo visa a trazer à tona o debate acerca do paradigma que t...

  7. Order and Progress? The Evolution of Brazilian Defense Strategy

    Science.gov (United States)

    2014-03-01

    Peace and Security for Brazil” (Brazilian Ministry of Defense, 2008), 5–6, http://www.defesa.gov.br/projetosweb/ estrategia /arquivos...Politica-Nacional-de-Defesa-- Estrategia -Nacional-de-Defesa-e-Livro-Branco/. 31 the strategic ramifications of a militarily powerful Brazil.”101...noticia/12227/DEFESA---Camara-aprova- Politica-Nacional-de-Defesa-- Estrategia -Nacional-de-Defesa-e-Livro-Branco/. Clunan, Anne. “Globalization and the

  8. 76 FR 42113 - Purified Carboxymethylcellulose From Mexico: Final Results of Antidumping Duty Administrative Review

    Science.gov (United States)

    2011-07-18

    ..., 2011) (Preliminary Results). The review covers one producer/ exporter, Quimica Amtex S.A. de C.V. The..., through June 30, 2010, is as follows: Weighted- Producer/exporter average margin (percentage) Quimica...

  9. International Symposium on Gas Kinetics (11th) Held in Assisi (Perugia), Italy on 2-7 September 1990. Book of Abstracts

    Science.gov (United States)

    1990-09-07

    CROSSED-BEAM CONDITIONS L. Bafiares and A. Gonz’a1ez Urefia Departamento de Quimica Fisica. Facultad de Quimica . Universidad Complutense de Madrid. 28040...Departamento de Quinica Fisica, Universidad del Pais Vasco, Bilbao, Spainand J.M.Alvariiio, Departamento de Quimica Fisica, Universidad de Salamanca...ilbao (Spain) Jesus Matcos, Dcparlamenlo de Quimnica Fisie:n, Fnrullad de Quimica , Salamanca (Spain) Antonio Lagani, Dipareimento di Chirnica

  10. Source Hierarchy List. Volume 1. A through D

    Science.gov (United States)

    1994-07-01

    AVEIRO ’JNIV (PORTUGAL) 426929 01 AVEIRO UNIV (PORTUGAL) DEPT DE ENGENHARIA * 01 AVEIRO UNIV (PORTUGAL...INSTITUTO DE QUIMICA 01 CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS BARCELONA (SPAIN) INSTITUTO DE QUIMICA ORGANICA 01 CONSEJO SUPERIOR DE...SPAIN) INSTITUTO DE QUIMICA FISICA 01 CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS MADRID (SPAIN) INST DE OPTICA* 1377 423244 406350 094990

  11. 75 FR 62100 - Purified Carboxymethylcellulose From Mexico: Final Results of Antidumping Duty Administrative Review

    Science.gov (United States)

    2010-10-07

    ... 15, 2010) (Preliminary Results). The review covers one producer/exporter, Quimica Amtex, S.A. de C.V... Carboxymethylcellulose from Mexico: Final Determination Analysis Memorandum for Quimica Amtex, S.A. de C.V.,'' dated... June 30, 2009, is as follows: Weighted- average Producer/exporter margin (percentage) Quimica Amtex, S...

  12. Synthesis of Chromophores for Nonlinear Optics Applications

    Science.gov (United States)

    2010-03-12

    Investigacion de Quimica Aplicada Blvd. Enrique reyna, No. 140 Saltillo, Coahuila, Mexico 25253 AFOSR FA9550-09-1-0017 12 March 2010...PERFORMING ORGANIZATION REPORT NUMBER CENTRO DE INVESTIGACION EN QUIMICA APLICADA BLVD ENRIQUE REYNA NO 140 SALTILLO 25253 MEXICO...APPLICATIONS Eduardo Arias, Ivana Moggio and Ronald F. Ziolo Centro de Investigacion de Quimica Aplicada Saltillo, Coahuila, Mexico 25253

  13. 75 FR 60084 - Purified Carboxymethylcellulose from Mexico: Preliminary Results of the First Five-year (“Sunset...

    Science.gov (United States)

    2010-09-29

    ..., Quimica Amtex S.A. de C.V. (Quimica Amtex), within the 30-day deadline specified in 19 CFR 351.218(d)(3)(i... of dumping at the following weighted-average margins: Quimica Amtex 12.61 percent All Others 12.61...

  14. Chemical characterization of Xanthan biopolymers synthesized by Xanthomonas campestris pv pruni strains; Caracterizacao quimica de biopolimeros sintetizados por Xanthomonas campestris pv pruni

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Angelita da S.; Vendruscolo, Claire T.; Furlan, Ligia [Universidade Federal de Pelotas, RS (Brazil). Centro de Biotecnologia]. E-mail: angelita@ufpel.tche.br; claire@ufpel.tche.br; ligia@ufpel.tche.br; Galland, Griselda [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Qumica

    2001-07-01

    In this work we describe the characterisation of Xanthan biopolymers synthesized by two Xanthomonas campestris pv pruni strains, in aerobic fermentation. By chromatography on TLC we could notice the presence of Mannose monomer in higher proportion in the 82 strain with relation to the another ones. The viscosity results showed the temperature dependence. The 06 and 82 strains had their viscosity increased whereas for the 87 strain we could observe a reduction with temperature increasing. The {sup 13}C NMR spectrum of 87 strain showed the characteristic signals at approximately 92.8, 70.4 and 61.4 ppm, attributed to C1, C4 and C6 from glucose monomer, with higher intensity. (author)

  15. Physicochemical characterization of ceramics from Sao Paulo II archaeological site; Caracterizacao fisico-quimica da ceramica do sitio arqueologico Sao Paulo II

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Rogerio Baria

    2013-08-01

    Archaeometry is a consolidated field with a wide application of nuclear analytical techniques for the characterization, protection, and restoration of archaeological pieces. This project aimed at studying the elementary chemical composition of 70 ceramic fragments samples from Sao Paulo II archaeological site, located along the Solimoes River channel, next to Coari city, in Brazilian Amazon. The characterization of samples was performed by neutron activation analysis (NAA). By the determination of 24 elements in the ceramic fragments ( Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Sb, Sm. Rb, Se, Ta, Tb, Th, U, Yb and Zn), it was possible to define groups of samples regarding the similarity/dissimilarity in elementary chemical composition. For such a task, the multivariate statistical methods employed were cluster analysis (C A), principal component analysis (PCA) and discriminant analysis (DA). Afterwards, seven ceramic fragments were selected based on the groups previously established, for the characterization of the site temporal horizon. Those ceramic fragments were analyzed by thermoluminescence (TL) and EPR for dating purposes. The firing temperatures were determined by electron paramagnetic resonance (EPR) technique, in order to infer about some aspects of the ceramic manufacture employed by the ancient peoples that lived in Sao Paulo 11. By the results obtained in this study, it was possible to identify the quantity of clay sources employed by the ceramists and the age of the ceramic pieces. Therefore, the results of this research may contribute to the study on the occupation dynamics in the pre-colonial Brazilian Amazon. (author)

  16. Efeito da composição quimica, origem e grau de maturação sobre cor e acrocanica da banana nanica obtida por secagem HTST.

    OpenAIRE

    Michelle Oliveira

    2007-01-01

    Resumo: A banana crocante, para ser consumida na forma de snacks, pode ser obtida através de secagem com ar a altas temperaturas por um curto período de tempo (HTST - High Temperature Short Time) na fase inicial de secagem, seguida da secagem à temperatura média (50-70°C). O objetivo deste trabalho foi avaliar a influência da composição química da banana nanica (Musa acuminata Colla subgrupo Cavendish), proveniente de duas origens e três graus de maturação sobre as características de crocânci...

  17. Uncertainty analysis in the determination of absorbed dose in water by Fricke chemical dosimetry; Analise das incertezas na determinacao da dose absorvida na agua por dosimetria quimica Fricke

    Energy Technology Data Exchange (ETDEWEB)

    Vasconcelos, Fabia; Aguirre, Eder Aguirre, E-mail: fabiavasco@hotmail.com, E-mail: ederuni01@gmail.com [Fundacao do Cancer, Rio de Janeiro, RJ (Brazil); Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil)

    2016-07-01

    This work studies the calculations of uncertainties and the level of confidence that involves the process for obtaining the dose absorbed in water using the method of Fricke dosimetry, developed at Laboratorio de Ciencias Radiologicas (LCR). Measurements of absorbance of samples Fricke, irradiated and non-irradiated is going to use in order to calculate the respective sensitivity coefficients, along with the expressions of the calculation of Fricke dose and the absorbed dose in water. Those expressions are used for calculating the others sensitivity coefficients from the input variable. It is going to use the combined uncertainty and the expanded uncertainty, with a level of confidence of 95.45%, in order to report the uncertainties of the measurement. (author)

  18. Etymology of transition metal biomolecules as a learning aid in Biological Chemistry; A etimologia de biomoleculas com metais de transicao como auxiliar na aprendizagem de Quimica Biologica

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jose A.L. da, E-mail: pcd1950@ist.utl.pt [Universidade Tecnica de Lisboa (Portugal). Instituto Superior Tecnico. Centro de Quimico Estrutural

    2013-11-01

    Numerous functional biomolecules are associated with metals, i.e. the metallobiomolecules; more specifically, some are dependent on transition metals required for several crucial biological roles. Nevertheless, their names can lead to ambiguous interpretations concerning the properties and performances of this group of biological molecules. Their etymology may be useful by providing a more perceptive insight into their features. However, etymology can lead to incongruous conclusions, requiring an especially careful approach to prevent errors. Examples illustrating these subjects shall be examined (author)

  19. 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)

  20. Physical and chemical properties of pigmented oil obtained from shrimp heads; Evaluacion fisico-quimica de aceite pigmentado obtenido de la cabeza de camaron

    Energy Technology Data Exchange (ETDEWEB)

    Nunez-Gastelum, J. A.; Sanchez-Machado, D. I.; Lopez-Cervantes, J.; Paseiro-Losada, P.; Sendon, R.; Sanchez-Silva, A. T.; Costa, H. S.; Aurrekoetxea, G. P.; Angulo, I.; Soto-Valdez, H.

    2011-07-01

    In this work the proximal analysis, physicochemical characterization, fatty acid profile and astaxanthin content of pigmented oil obtained by fermentation shrimp heads are presented. Lipids are the major components in the oil (95%). The saponification number is 178.62 mg KOH/g, iodine value 139.8 cg iodine/g, and the peroxide value was not detected. Density and viscosity were 0.92 mg/ml and 64 centipoises, respectively. The highest contents of fatty acids were linoleic (C18:2n6), oleic (C18:1n9) and palmitic (C16:0). Eicosapentaenoic acid (C20:5n3, EPA) and docosahexaenoic acid (C22:6n3, DHA) account for 9% of the total. The content of astaxanthin was 2.72 mg/g dry weight. The pigmented oil is a dietary source of nutrients with high value such as astaxanthin. (Author) 45 refs.

  1. Chemical characterization of the gels produced by the diazotrophic bacteria Rhizobium tropici and Mesorhizobium sp; Caracterizacao quimica dos geis produzidos pelas bacterias diazotroficas Rhizobium tropici e Mesorhizobium sp.

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Nilson Kobori [Departamento de Engenharia e Tecnologia de Alimentos, Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista, Sao Jose do Rio Preto - SP (Brazil); Aranda-Selverio, Gabriel; Exposti, Diego Tadeu Degli; Silva, Maria de Lourdes Corradi da [Departamento de Fisica, Quimica e Biologia, Faculdade de Ciencias e Tecnologia, Universidade Estadual Paulista, Presidente Prudente - SP (Brazil); Lemos, Eliana Gertrudes Macedo; Campanharo, Joao Carlos [Departamento de Tecnologia, Faculdade de Ciencias Agrarias e Veterinaria, Universidade Estadual Paulista, Jaboticabal - SP (Brazil); Silveira, Joana Lea Meira [Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Parana, Curitiba - PR (Brazil)

    2012-07-01

    The exopolysaccharides with characteristics of gel produced by Rhizobium tropici (EPSRT) and Mesorhizobium sp (EPSMR) are acidic heteropolysaccharide composed mainly of glucose and galactose in a molar ratio of 4:1 and 5:1 respectively, with traces of mannose ({approx} 1%). Chemical analysis showed the presence of uronic acid, pyruvate and acetyl-substituents in the structures of both polymers. Experiments of gel permeation chromatography and polyacrylamide gel electrophoresis showed that EPSRT and EPSMR are homogeneous molecules with low grade of polydispersity. The EPS were characterized using spectroscopic techniques of FT-IR, {sup 1}H and {sup 13}C-NMR. (author)

  2. Artificial intelligence applied to natural products; computer study of pimarane diterpene. Aplicacao da inteligencia artificial em quimica de produtos naturais: estudo, por computador, dos diterpenos pimaranicos

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, M N; Borges, J H.G.; Furlan, M; Gastmans, J P [UNESP, Araraquara, SP (Brazil). Dept. de Quimica Organica; Emerenciano, V de [Sao Paulo Univ., SP (Brazil). Dept. de Quimica Organica

    1989-01-01

    This paper describes the study of the sup(13)C NMR characteristic signals of naturally occurring pimarane. The analysis is performed by computer, starting from a data base which encloses about 400 diterpenes and using the PICKUPS programm. By this way it is possible to analyse substructure from one to five atoms as well as the effects of substituents on them. (author).

  3. Influence of chemical composition in crystallographic texture Fe-Cr-Mo alloys; Influencia da composicao quimica na textura cristalografica de ligas Fe-Cr-Mo

    Energy Technology Data Exchange (ETDEWEB)

    Moura, L.B.; Guimaraes, R.F. [Instituto Federal de Educacao, Ciencia e Tecnologia do Ceara, Fortaleza, CE (Brazil). Dept. da Industria; Abreu, H.F.G. [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil)

    2010-07-01

    The use of steels with higher contents of Mo in the oil industry has been an alternative to reduce the effect of naphthenic corrosion in refining units. The addition of Mo in Fe-Cr alloys in the same manner that increases resistance to corrosion naphthenic causes some difficulties such as difficulty of forming, welding and embrittlement. In this work, experimental ingots of Fe-Cr-Mo alloys (Cr - 9, 15 and 17%, Mo - 5, 7 and 9%) were melted in vacuum induction furnace and hot and cold rolled in a laboratory rolling mill. The influence of chemical composition on crystallographic texture of samples subjected to the same thermo-mechanical treatment was analyzed by x-ray diffraction. The results indicate that fiber (111) becomes more intense with increasing Mo and/or Cr contents. (author)

  4. Influence of the mineralogical composition of cement in the diffusion of chemical species; Influencia de la composicion mineralogica del cemento en la difusion de especies quimicas

    Energy Technology Data Exchange (ETDEWEB)

    Galicia A, E.

    2015-07-01

    The disposal is the final stage of radioactive waste management. This is essentially placing them in a facility with a reasonable assurance of safety. In this last stage, the ultimate goal is the confinement and isolation of radioactive waste from the human environment for a time period and under conditions such that the release of radionuclides not put in radiation risk to people and the environment. In relation to the storage of radioactive waste of low and medium activity, the final repositories for radioactive waste, based in cement materials are already operating in many countries. The isolation is performed by applying natural or artificial barriers between radioactive waste and man so as to prevent the release of radionuclides to the environment, until they have decreased their toxicity. The cement-based materials are involved in the different stages of the radioactive waste management since they are used for immobilization of waste in the container, container manufacturing and filling the spaces between the containers and vaults container and also as a barrier engineering and construction material in civil engineering. The concrete (cement mix + water + sand + gravel) it is one of the materials used to produce the engineered barrier system and produce containers for radioactive waste. In addition to their mechanical properties (product processing into hydraulic binder after being hydrated), their composition and solubility allow cushion the contact groundwater to ph higher (12.0 - 13.5) during considerable time scales (10{sup 14} - 10{sup 15} years) and it has an active role with the radionuclides confinement present in the radiological inventory of radioactive waste. The study of the microstructures of cement is a constant challenge for specialists working in this area, mainly due to the complex and heterogeneous mineralogical composition. Cement consists of many different phases in order to achieve specific properties such as reactivity properties, setting time, color and others. Portland cements commonly used in the construction industry, they are based primarily on the mineral phases of limestone and silica. In conventional cement admixtures the chemical reactivity depends on the ratio of tricalcium and dicalcium silicate (C{sub 3}S/C{sub 2}S), the tricalcium aluminate (C{sub 3}A) influences in the setting time and tetra calcium ferro aluminate (C{sub 4}AF) gives a different color to the cement. In this research the mineralogical composition of two commercial cements is studied and its influence on the phenomenon of radionuclides retention. For this particular concrete discs were manufactured with water, sand and two commercial cements: Tolteca Extra CPC 30-RRS and Cruz Azul CPC Type II 30-R. The solid observation techniques used for analysis of the cement paste and concrete they are: X-ray Diffraction and Scanning Electron Microscopy, as well as the nuclear analytic techniques of Moessbauer and X-ray Fluorescence. (Author)

  5. Major accidents involving dangerous chemicals and Standard Basic Self-Protection; Accidentes graves en los que intervangan sustancias quimica peligrosas y Norma Basica de Autoproteccion

    Energy Technology Data Exchange (ETDEWEB)

    Alonso Fernandez, L.

    2011-07-01

    Nuclear and radioactive facilities and other centers, institutions and agencies engaged in activities that may lead to emergency situations, are subject to specific regulations directed to take measures to prevent and control risks at source and to act initially in emergency situations and limit the consequences, in order to protect people, property and the environment. With these premise, place the following article, which summarizes the basic guidelines in the field of major accident and self-protection, summarizing the implications of current legislation in this field. (Author)

  6. 3D simulation of the thermal and chemical plumes using open source software; Simulacion 3D de las plumas termica y quimica mediante software de codigo libre

    Energy Technology Data Exchange (ETDEWEB)

    Saenz Temino, J. L.; Lerones Martin, J.; Gonzalez Delgado, J.

    2013-07-01

    The interaction of thermal and chemical plumes in the region of the Irish Sea near the site has been simulated using a finite element model representative of the local hydrodynamic regime, concluding how the method of selected cooling, open cycle, is physically and environmentally feasible. Furthermore, tunnel lengths required for each scenario under discussion have been preliminarily defined, varying in a range from 1800 to 2300 meters for a unit (1 tunnel), 4400-6300 meters of two units (2 tunnels) and 8000 meters to three units (2 tunnels), depending on the chosen technology.

  7. Influence of chemical composition of civil construction waste in the cement paste; Influencia da composicao quimica dos residuos da construcao civil a pasta de cimento

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, G.A.; Andrade, A.C.D.; Souza, J.M.M.; Evangelista, A.C.J.; Almeida, V.C., E-mail: valeria@eq.ufrj.b [Universidade Federal do Rio de Janeiro (EQ/UFRJ), RJ (Brazil). Escola de Quimica

    2009-07-01

    The construction and demolition waste when disposed inappropriately might cause serious public health problems. Its reutilization focusing on the development of new products using simple production techniques, assuring a new product life cycle and not damaging the environment is inserted in sustainable concept. The aim of this work was identifying the characteristics of types of waste generated in a residential reform (glassy ceramic and fill dirt leftovers) verifying separately its influence on cement pastes mechanical behavior. Cement pastes + wastes were prepared in 25% and 50% proportions with an approximately 0,35 water/cement relation and, glue time determination, water absorption, resistance to compression and X-ray fluorescence assays were taken. The results indicate that the chemical composition of the waste causes changes in the behavior of cement pastes, reflecting on their resistance to compression. (author)

  8. Chemical properties of gutta-percha endodontic filling material: investigation of five commercial brands; Propriedades quimicas de cones de guta-percha: avaliacao de diferentes marcas comerciais

    Energy Technology Data Exchange (ETDEWEB)

    Silva Junior, Joao Batista A.; Paula, Regina C.M.; Feitosa, Judith P.A. [Ceara Univ., Fortaleza, CE (Brazil). Dept. de Quimica Organica e Inorganica]. E-mail: juniorquim@yahoo.com.br; rpaula@dqoi.ufc.br; judith@dqoi.ufc.br; Gurgel Filho, Eduardo; Teixeira, Fabricio B [Universidade Estadual de Campinas, Piracicaba, SP (Brazil). Faculdade de Odontologia.Dept. de Odontologia Restauradora]. E-mail: gurgeleduardo@aol.com

    2001-07-01

    Chemical composition e thermal stability of five brands of gutta-percha endodontic filling material were investigated. Samples with higher amount of organic materials possess higher thermal stability. Investigation of gutta-percha polymer extracted from the endodontic filling by IR and NMR shows that the polymer is predominantly trans-polyisoprene. The thermal stability and molar mass were similar for four brands, however the 'Tanari' brand has got lower molar mass value than the other ones. (author)

  9. Chemical variations observed in irradiated, treated with IPC and control potato tubers; Variaciones quimica observadas en tuberculos de patata irradiados, tratados con IPC y testigo

    Energy Technology Data Exchange (ETDEWEB)

    Mazon Matanzo, M P; Fernandez Gonzalez, J

    1976-07-01

    The content in soluble sugars, ascorbic acid and phenolic acids of potato tubers preserved by irradiation and IPC, during storage period of five months are studied. In the irradiated tubers, soluble sugars increased immediately after the irradiation, in relation to the control tubers reaching inferior values to those reached by the control tubers, at the end of the storage period. The content in ascorbic acid is generally kept higher in the irradiated and IPC treated tubers than in the control tubers and the content in phenolic acids increased in the irradiated and IPC treated tubers by immediate effect of this treatment. (Author) 39 refs.

  10. Relatório do Mestrado em Ensino da Fisica e de Quimica no 3º Ciclo do Ensino Básico

    OpenAIRE

    Carvalho, Paulo Jorge de Oliveira

    2014-01-01

    Relatório de estágio do Mestrado em Ensino de Física e de Química no 3.º ciclo do Ensino Básico e no Ensino Secundário apresentado à Faculdade de Ciências e Tecnologia da Universidade de Coimbra

  11. Physical chemistry characterization of soils of the Storage Center of Radioactive Wastes; Caracterizacion fisico-quimica de suelos del Centro de Almacenamiento de Desechos Radioactivos

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez T, U. O.; Fernandez R, E. [Instituto Tecnologico de Toluca, Av. Tecnologico s/n, 52140 Metepec, Estado de Mexico (Mexico); Monroy G, F.; Anguiano A, J., E-mail: uohtrejo@gmail.com [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (MX)

    2011-11-15

    Any type of waste should be confined so that it does not causes damage to the human health neither the environment and for the storage of the radioactive wastes these actions are the main priority. In the Storage Center of Radioactive Wastes the radioactive wastes generated in Mexico by non energy applications are storage of temporary way. The present study is focused in determining the physical chemistry properties of the lands of the Storage Center of Radioactive Wastes like they are: real density, ph, conductivity percentage of organic matter and percentage of humidity. With what is sought to make a characterization to verify the reaction capacity of the soils in case of a possible flight of radioactive material. The results show that there are different density variations, ph and conductivity in all the soil samples; the ph and conductivity vary with regard to the contact time between the soil and their saturation point in water, for the case of the density due to the characteristics of the same soil; for what is not possible to establish a general profile, but is necessary to know the properties of each soil type more amply. Contrary case is the content of organic matter and humidity since both are in minor proportions. (Author)

  12. Chemical, mineralogical and ceramic properties of clays from Northern Santa Catarina, Brazil; Caracterizaco fisico-quimica de argilas da regiao norte de Santa Catarina

    Energy Technology Data Exchange (ETDEWEB)

    Correia, S L; Bloot, E L; Folgueras, M.V., E-mail: sivaldo@joinville.udesc.b [Universidade do Estado de Santa Catarina (UDESC/CCT), Joinville, SC (Brazil). Centro de Ciencias Tecnologicas; Hotza, D [Universidade Federal de Santa Catarina (UFSC/EQA), Florianopolis, SC (Brazil). Dept. de Engenharia Quimica

    2009-07-01

    Clay materials crop out in the northern Santa Catarina mining district were investigated in order to assess their potential in the ceramic industry. Four different clays (A, B, C and D) were selected. Their chemical composition was obtained by Xray fluorescence and their mineralogy by X-ray diffraction, coupled with numerical rational analysis. Their thermal behaviour was studied by differential thermal analysis. Technological testing consisted in a simulation of the industrial processing performed at a laboratory scale. The test pieces were obtained by pressing and fired in the range of 850-1200 deg C. In each case their technological properties were studied. The main mineralogical phases detected were kaolinite, quartz and mica. Hematite and feldspars may be present in the clays. The clays show two groups of particle sizes almost equally frequent in the range of 1 to 60 {mu}m. The northern Santa Catarina clays are suitable for the production of bricks and earthenware in the 900- 1100 deg C range. (author)

  13. Spectral analysis of colour-quenched and chemically quenched C-14 samples; Estudio espectral de muestras de C-14 con extincion quimica y por color en centelleo liquido

    Energy Technology Data Exchange (ETDEWEB)

    Scott, P E; Grau, A

    1987-07-01

    In this paper pairs of pulse height distribution curves, of C-14 samples, colour-quenched and chemically quenched was obtained. The possibility to choose a counting window in order to obtain the counting efficiency curves, for both type of quenching was studied. (Author) 7 refs.

  14. Exergetic analysis of a gas turbine plant with chemical recuperation; Analise exergetica de uma planta de turbina a gas com recuperacao quimica

    Energy Technology Data Exchange (ETDEWEB)

    Prieto, Mario G. Sanchez; Nebra, Silvia Azucena; Gallo, Waldir L. Ribeiro [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Energia]. E-mails: 192572rg@discovery.fem.unicamp.br; sanebra@fem.unicamp.br; wgallo@fem.unicamp.br

    2000-07-01

    One of the proposals that has been more recently analyzed with growing interest in Gas Turbine cycles, with the purpose of obtaining gains in the power output and thermal efficiency, is the Chemically Recuperated Gas Turbine Cycle, (CRGT). Such systems are equipped of chemical heat recovery components in which the waste heat in the turbine exhaust is used to convert a methane-steam mixture into a hydrogen-rich fuel in a methane steam reformer. One additional aspect of these cycles that represents a potential benefit is explained by the ultra-low NO{sub x} emission levels, even less than those system which use steam injection This paper, with the aid of the concepts emanated from the Second Thermodynamic Law, is presenting an evaluation of the exergetic performance of one installation of this type. Exergetic efficiencies are evaluated according to the relation fuel-product, considering one control volume for each component of the system. (author)

  15. Effects of irradiation on the physicochemical properties of carioca beans; Efeitos da irradiacao nas propriedades fisico-quimicas do feijao carioca

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Damaris Carvalho

    2016-10-01

    The common bean is an important component in the diet of the average Brazilian person. Each harvest of beans, losses occur due to attacks of insects and rodents. One of the ways to preserve the beans, and at the same time keep its nutritional characteristics, is the use of gamma radiation. This study aimed to evaluate the effects of different doses of gamma radiation on the physical and chemical properties of the carioca variety of common beans subject to cooking of soaked and unsoaked beans. Portions of raw beans were used as control and the other was subject to ionizing radiation at doses of 1, 5 and 10 kGy. Following irradiation, a portion of the samples (control and irradiated) were soaked and the other was not, then all beans were cooked. The cooked samples were lyophilized, milled and then accommodated in pots and stored at -23 deg C temperatures. The analysis of chemical composition, determination of protein digestibility, condensed tannin and phytic acid content were performed using the milled samples. Using whole grains, were performed analysis of expansion capability and hydration, cooking time and instrumental color. Irradiation did not alter the chemical composition of soaked and unsoaked samples. The condensed tannin levels did not reduce according to increased doses. The phytic acid concentrations were reduced at the doses of 5 and 10 kGy for soaked samples, whereas for the not soaked beans, gamma irradiation did not influence the phytate content. The protein digestibility decreased on soaked samples, at doses of 1 kGy and in the other doses, the reduction was not significant. As for not soaked beans, increases in digestibility were observed at dose of 10 kGy. As the doses increased, reduction in cooking time on soaked and unsoaked beans was noted. At a dose of 10 kGy, the bean expansion capability increased. The samples' color did not change significantly, as the doses increased. Therefore, it is concluded that ionizing radiation has no effect on the chemical composition and tannin content. Irradiation influenced the phytates when applied in higher doses, but only in soaked samples, as well as mitigate protein digestibility on soaked beans. It reduces cooking time, raises bean expansion capability at a 10 kGy dose, but it does not change the bean color as doses increase. (author)

  16. Chemical and microbiological assessments of the multi mixture treated by gamma radiation; Avaliacao quimica e microbiologica da multimistura tratada por irradiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, Cinthia Graciele

    2008-07-01

    In Brazil, the multi mixture have being used since the eighties as an alternative against severe infantile malnutrition of the poorest population. However, its use is still reason of controversies mainly due to: the presence of anti nutritional factors, the microbiological quality and the nutritional value. Considering the routine use of multi mixture in the region, this work aimed to evaluate samples of multi mixture were collected in the metropolitan area of the City of Belo Horizonte/MG for determining the anti nutritional factors (phytic and oxalic acids), the microbiological quality, the centesimal and mineral composition, and still the induced effect in these factors of the gamma radiation. For the analyses, the samples passed by the process of gamma irradiation at doses of: 2, 4, 6, 8 and 10 kGy and then were evaluated anti nutritional factors (phytic acid and oxalic), the microbiological quality (yeasts and molds, Salmonella, Coagulase positive Staphylococcus, Bacillus cereus, coliform to 45 deg C) to full percentage (moisture, ash, proteins, carbohydrates and lipids) and the efficiency of the method of Paramagnetic Electronic Resonance (EPR) in the detection of irradiated samples. The mineral composition of the samples was carried out by the irradiation by Neutronic Activation. The methods used were searched in literature. The obtained results suggest that the concentration of the phytic and oxalic acids can not be appropriated for the children with severe nutritional deficit and that it would be necessary additional control in their daily ingestion due to the absorption of essential minerals. In general the samples had presented acceptable microbiological quality for consumption, except by one of it. The data of the centesimal and mineral composition, in the usually recommended portions, showed lower concentration than recommended for children. Any significant alteration in phytic and oxalic acids as well as in the centesimal composition were detected after gamma irradiation. The electronic paramagnetic resonance can be detected irradiated samples. (author)

  17. Coupling between solute transport and chemical reactions models. Acoplamiento de modelos de transporte de solutos y de modelos de reacciones quimicas

    Energy Technology Data Exchange (ETDEWEB)

    Samper, J.; Ajora, C. (Instituto de Ciencias de la Tierra, CSIC, Barcerlona (Spain))

    1993-01-01

    During subsurface transport, reactive solutes are subject to a variety of hydrodynamic and chemical processes. The major hydrodynamic processes include advection and convection, dispersion and diffusion. The key chemical processes are complexation including hydrolysis and acid-base reactions, dissolution-precipitation, reduction-oxidation, adsorption and ion exchange. The combined effects of all these processes on solute transport must satisfy the principle of conservation of mass. The statement of conservation of mass for N mobile species leads to N partial differential equations. Traditional solute transport models often incorporate the effects of hydrodynamic processes rigorously but oversimplify chemical interactions among aqueous species. Sophisticated chemical equilibrium models, on the other hand, incorporate a variety of chemical processes but generally assume no-flow systems. In the past decade, coupled models accounting for complex hydrological and chemical processes, with varying degrees of sophistication, have been developed. The existing models of reactive transport employ two basic sets of equations. The transport of solutes is described by a set of partial differential equations, and the chemical processes, under the assumption of equilibrium, are described by a set of nonlinear algebraic equations. An important consideration in any approach is the choice of primary dependent variables. Most existing models cannot account for the complete set of chemical processes, cannot be easily extended to include mixed chemical equilibria and kinetics, and cannot handle practical two and three dimensional problems. The difficulties arise mainly from improper selection of the primary variables in the transport equations. (Author) 38 refs.

  18. DISEÑO DE UNA HERRAMIENTA ÚTIL PARA DETECTAR TEMPRANAMENTE ALUMNOS CON DIFICULTADES EN EL APRENDIZAJE DE CONCEPTOS DE QUIMICA

    Directory of Open Access Journals (Sweden)

    Alejandra V. Quiroga

    2013-01-01

    Full Text Available El objetivo de este trabajo fue diseñar una evaluación diagnóstica que permita detectar tempranamente a aquellos alumnos con dificultades de aprendizaje e incluirlos en distintas instancias de apoyo ofrecidas por la Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata. La evaluación diagnóstica fue construida utilizando analogías de conceptos químicos que serán estudiados en el curso de Química General e Inorgánica. El uso de analogías es ampliamente utilizado en la enseñanza de la química y juega un papel importante en el proceso de enseñanza-aprendizaje de las ciencias. Se comparó el desempeño alcanzado en la evaluación diagnóstica con el resultado del primer parcial de Química General e Inorgánica y con el resultado obtenido en el examen de ingreso. Se puede concluir que la evaluación diagnóstica diseñada sería una herramienta fundamental para seleccionar potenciales participantes para el sistema de tutorías que se lleva a cabo en la Facultad de Ciencias Agrarias y Forestales.

  19. Chemical characterization of polymeric surge arresters and insulators used in high voltage lines; Caracterizacao quimica de para-raios e isoladores utilizados 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 [Lab. de Ciencia e Tecnologia de Polimeros, Dept. de Engenharia Quimica da EE.UFMG, Belo Horizonte, MG (Brazil); Souza, Breno P.G. de [CEMIG Distribuicao S/A, Belo Horizonte, MG (Brazil)], e-mail: bpgsouza@gmail.com

    2011-07-01

    In the last two decades, traditional porcelain and glass surge arresters and insulators, used in the electrical system, have been replaced by polymeric materials. For this type of application it is recommended that these devices have a high resistance to environmental stresses and impacts without suffering degradation process. Considering the environmental conditions these polymers are exposed to, when used for this purpose, studies of their chemical composition are needed. In this work, polymeric materials present in surge arresters and insulators used in electrical system were chemically characterized by Fourier Transform Infrared Spectroscopy (FTIR). FTIR analysis showed that the samples tested are made of poly(dimethylsiloxane) - PDMS (silicone) and additives such as alumina trihydrated [Al (OH)3] and calcium carbonate. (author)

  20. Evaluation of the chemical modifications in petroleum asphalt cement with the addition of polypropylene; Avaliacao das modificacoes quimicas no cimento asfaltico de petroleo com a adicao de polipropileno

    Energy Technology Data Exchange (ETDEWEB)

    Marcondes, C.P.; Sales, M.J.A.; Resck, I.S., E-mail: mjsales@unb.b [Universidade de Brasilia (LabPol/UnB), DF (Brazil). Inst. de Quimica. Lab. de Pesquisa em Polimeros; Farias, M.M.; Souza, M.V.R. [Universidade de Brasilia (UnB), DF (Brazil). Dept. de Engenharia Civil e Ambiental

    2010-07-01

    Studies show that the common distress mode in the Brazilian highway network are fatigue cracks and plastic deformation, which are associated with the type of material used in the pavement layers, structural project, excessive traffic load and weathering. To minimize these defects, research on modifiers such as polymers, added to asphalt binders have been developed to provide physical, chemical and rheological improvement. This paper investigates chemical modifications of the binders with the addition of PP by FTIR, NMR and DSC. FTIR spectra of pure and modified binder showed no differences in absorption. NMR analysis showed no strong chemical bonds between the binder and PP. DSC curve of PP showed a melting temperature of 160 deg C ({Delta}H = 94J/g) and the pure binder presented an endothermic transition between 20 and 40 deg C ({Delta}H = 2J/g). In the DSC curves of mixtures, these transitions are not significant, indicating possible interactions between asphalt binder and PP. (author)

  1. Tecnologia da destilação molecular : da modelagem matematica a obtenção de dados experimentais aplicada a produtos de quimica fina

    OpenAIRE

    Cesar Benedito Batistella

    1999-01-01

    Resumo: A industrialização de compostos de química fina requer muito esforço em sua manufatura, especialmente no estágio de purificação, devido às especificações rigorosas desta classe de produtos. A destilação convencional, entretanto, em muitos casos, não pode ser utilizada, devido à instabilidade térmica dos compostos envolvidos. Existem, por exemplo, produtos sensíveis ao calor, tais como, vitaminas A, E, K, muitos intermediários farmacêuticos, como a ranitidina, diversos cosméticos, óleo...

  2. 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)

  3. Physical-chemical characterization of sediments from Lapa Grande de Taquaracu archaeological site, MG; Caracterizacao fisico-quimica de sedimentos do sitio arqueologico Lapa Grande de Taquaracu, MG

    Energy Technology Data Exchange (ETDEWEB)

    Tudela, Diego Renan Giclioti

    2013-07-01

    In this project the elemental concentrations of Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sc, Sm, Ta, Tb, Th, U, Yb and Zn were determined by instrumental neutron activation analysis (INAA) in 60 sediment samples from Lapa Grande de Taquaracu archaeological site, located in MG State. The samples were provided by Dr. Astolfo Gomes de Mello Araujo from the Museum of Archaeology and Ethnology, University of Sao Paulo. This site is a palaeoindian rockshelter located near Lagoa Santa karst with characteristics which could be used to test karst abandonment model during the Middle Holocene related to dry conditions. The results of elemental concentrations, interpreted by multivariate statistical analysis, showed the formation of three different compositional and well-defined groups. The variable selection study by means of Procrusts analysis was also carried out. X-ray diffraction (XRD) analyses were also performed in 8 samples to study their mineralogical composition and they showed that there are distinctions in crystalline structure between the samples of the three elemental compositional groups, being quartz, calcite, dolomite and mica the main crystalline phases present in the samples. (author)

  4. Chemical composition of spoil from bituminous coal and anthracite in Spain. Composicion quimica de los esteriles de hulla y antracita de Espana

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Canibano, J; Fernandez Valcarce, A

    1991-05-01

    The article describes the chemical composition of spoil from bituminous coal and anthracite in Spain. Chemical composition, mineralogical properties and physical and mechanical characteristics are used to determine the most suitable application for the spoil in order to solve the problem of disposal. 20 refs., 5 figs., 4 tabs.

  5. Resolution of ibuprofen: a project for an experimental organic chemistry course; Resolucao do ibuprofeno: um projeto para disciplina de quimica organica experimental

    Energy Technology Data Exchange (ETDEWEB)

    Romero, Adriano L.; Baptistella, Lucia H.B.; Coelho, Fernando; Imamura, Paulo M., E-mail: imam@iqm.unicamp.br [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica

    2012-07-01

    A practical and didactic sequence of experiments was proposed to illustrate the stereochemistry concept, optically active compounds, resolution of racemates, and use of the NMR technique, including 2D-COSY for identification of organic compounds, on a laboratory course for undergraduate students. The sequence was: extractions of racemic ibuprofen and chiral naproxen from commercial tablets; syntheses of diastereoisomeric amides reacting chiral (S)-(-)-{alpha}-methylbenzylamine with (+-)-ibuprofen; separation and determination of absolute configuration of amides by {sup 1}H NMR spectroscopy and GC analysis, and hydrolysis of amides to obtain (+)- and (-)-ibuprofen. (author)

  6. Development of method to chemical separation of gallium-67 by thermal diffusion technique; Desenvolvimento de metodo para separacao quimica de galio-67 pela tecnica de difusao termica

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Patricia de Andrade

    2012-07-01

    Radioisotopes of gallium have been studied and evaluated for medical applications since 1949. Over the past 50 years {sup 67}Ga has been widely used in the diagnosis of various diseases, including acute and chronic inflammatory lesions, bacterial or sterile and several types of tumors. In Brazil 30% of clinics that provide services for Nuclear Medicine use {sup 67}Ga citrate and the demand for 67{sup G}a at IPEN-CNEN/SP is 37 GBq (1 Ci)/week. The {sup 67}Ga presents physical half-life of 3.26 days (78 hours) and decays 100% by electron capture to stable {sup 67}Zn. Its decay includes the emission of {gamma} rays with energies of 93.3 keV (37%), 184.6 keV (20.4%), 300.2 keV (16.6%) and 888 keV (26%). In the past {sup 67}Ga was produced by the reaction {sup 68}Zn (p, 2n) {sup 67}Ga at IPEN-CNEN/SP. After irradiation, the target was dissolved in concentrated HCl and the solution percolated through a cationic resin DOWEX 50W-X8, 200-400 mesh, conditioned with 10 mol L{sup -1} HCl. Zinc, nickel and copper were eluted in 10 mol L{sup -1} HCl and {sup 67}Ga 3.5 mol L{sup -1} HCl. The final product was obtained as {sup 67}Ga citrate. This work presents a new, fast, direct and efficient method for the chemical separation of 67{sup G}a by thermal diffusion (heating of the target) combined with concentrated acetic acid extraction. Purification was performed by ion exchange chromatography. Natural zinc electrodeposition was performed on nickel/copper plates as substrate and the zinc deposits were adherent to the substrate, slightly shiny and uniform. The targets were irradiated with 26 MeV protons and integrated current of 10 {mu}A.h. After irradiation, the targets were heated at 300 deg C for 2 hours and placed in contact with concentrated acetic acid for 1 hour. The average yield of extraction of {sup 67}Ga was (72 {+-} 10)%. This solution was evaporated and the residue was taken up in 0.5 mol L{sup -1} NH{sub 4}OH. The 67{sup G}a was purified on cationic resin Dowex 50WX8 in NH{sub 4}OH medium. The {sup 67}Ga recovery was (98 {+-} 2)%. This solution was evaporated and taken up in 0.1 mol L{sup -1} HCl. The chemical purity was evaluated by ICP-OES that resulted in (2 {+-} 1) {mu}g mL{sup -1} of zinc. The concentration of iron, copper and nickel was lower than the detection limits and also than the utilization limits for {sup 67}Ga. The radionuclidic purity was greater than (99.9%). This method showed to be suitable to obtain high purity {sup 67}Ga in less aggressive chemical conditions than before. (author)

  7. Asymmetric catalysis in Brazil: development and potential for advancement of Brazilian chemical industry; Catalise assimetrica no Brasil: desenvolvimento e potencialidades para o avanco da industria quimica brasileira

    Energy Technology Data Exchange (ETDEWEB)

    Braga, Antonio Luiz, E-mail: braga.antonio@ufsc.br [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Departamento de Quimica; Luedtke, Diogo Seibert; Schneider, Paulo Henrique [Universidade Federal do Rio Grande do Sul (UFRS), Porto Alegre, RS (Brazil). Instituto de Quimica; Andrade, Leandro Helgueira [Universidade de Sao Paulo (USP), SP (Brazil). Instituto de Quimica; Paixao, Marcio Weber [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil). Departamento de Quimica

    2013-07-01

    The preparation of enantiomerically pure or enriched substances is of fundamental importance to pharmaceutical, food, agrochemical, and cosmetics industries and involves a growing market of hundreds of billions of dollars. However, most chemical processes used for their production are not environmentally friendly because in most cases, stoichiometric amounts of chiral inductors are used and substantial waste is produced. In this context, asymmetric catalysis has emerged as an efficient tool for the synthesis of enantiomerically enriched compounds using chiral catalysts. More specifically, considering the current scenario in the Brazilian chemical industry, especially that of pharmaceuticals, the immediate prospect for the use of synthetic routes developed in Brazil in an enantioselective fashion or even the discovery of new drugs is practically null. Currently, the industrial production of drugs in Brazil is primarily focused on the production of generic drugs and is basically supported by imports of intermediates from China and India. In order to change this panorama and move forward toward the gradual incorporation of genuinely Brazilian synthetic routes, strong incentive policies, especially those related to continuous funding, will be needed. These incentives could be a breakthrough once we establish several research groups working in the area of organic synthesis and on the development and application of chiral organocatalysts and ligands in asymmetric catalysis, thus contributing to boost the development of the Brazilian chemical industry. Considering these circumstances, Brazil can benefit from this opportunity because we have a wide biodiversity and a large pool of natural resources that can be used as starting materials for the production of new chiral catalysts and are creating competence in asymmetric catalysis and related areas. This may decisively contribute to the growth of chemistry in our country. (author)

  8. Synthesis of zeolites from boiler fly ash: physical, chemical and mineralogical characterization; Sintese de zeolitas a partir de cinza volante de caldeiras: caracterizacao fisica, quimica e mineralogica

    Energy Technology Data Exchange (ETDEWEB)

    Rocha Junior, C.A.F.; Santos, S.C.A.; Souza, C.A.G., E-mail: augustorocha2@gmail.com [Programa de Pos Graduacao em Engenharia Quimica (PPEQ-UFPA), Belem, PA (Brazil); Angelica, R.S.; Neves, R.F. [Programa de Pos-Graduacao em Geologia e Geoquimica, Instituto de Geociencias (PPGG-IG-UFPA), Ananindeua, PA (Brazil)

    2012-01-15

    Along the years, worldwide industrial development has causing a growing generation of residues, bringing potentials environmental problems. A study of the characteristics of these wastes, as well as the development of techniques for their use in new processes becomes indispensable for the environment preservation. The main purpose of this work is to evaluate the possible use of two important industrial residues from the Amazon region for zeolite synthesis: (a) the fly ash (particle size < 100 {mu}m) that comes from burning of mineral coal in boiler; and (b) the micro silica, a by-product of the reaction between quartz and coal in the production of metallic silicon and alloys iron-silicon.The following chemical, physical and mineralogical characterization methods were carried out: X-ray diffractometry, X-ray fluorescence, scanning electron microscopy, granulometric analysis, differential thermal and thermogravimetric analysis (DTA-TG). The analyses were carried out at the following conditions: 60, 100, 150 and 190 deg C, Na{sub 2}O/Al{sub 2}O{sub 3} molar ratio of 5 and Si/Al molar ratio ranging from 2.12 to 15, and reaction time of 24 h. The results of the fly characterization demonstrate its enormous potential as raw material for the zeolite synthesis. SiO{sub 2} and Al{sub 2}O{sub 3} represent more than 50% of its composition, mineralogical phases defined, low humidity content, low particle size (d{sub 90} < 10 {mu}m), among others. Mineralogical analyses of the synthesized products showed the formation of some zeolite types, as follow: analcime, phillipsite, sodalite, zeolite P and tobermorite. The results show that the mixture fly ash-micro silica in these reaction conditions point to a promising material for zeolite synthesis (author)

  9. Effect of chemical treatment on thermal properties of fibers from pineapple;Estudo da modificacao quimica nas fibras provenientes da coroa do abacaxi

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Rafael I.M.; Mulinari, Daniella R.; Carvalho, Kelly C.C.; Conejo, Luiza dos Santos; Voorwald, Herman J.C.; Cioffi, Maria Odila H., E-mail: rafaelimf@hotmail.co [Universidade Estadual Paulista (UNESP), Guaratingueta, SP (Brazil)

    2009-07-01

    In this work the effect of the chemical modification of natural fibres from of pineapple fibres with alkaline solution was studied. After modification the in nature and modified fibres were analyzed by XRD diffractometry and thermogravimetry with objective to evaluate influence chemical treatment in surface and in the thermal properties fibres. With the obtained results it was possible to verify an increase of 10.4 % in the crystallinity index of fibres beyond the increase around 4.5% in the degradation temperature, what it indicates an increase in the stability thermal of the fibres. (author)

  10. Chemical and radiological characterization of meals served by the COSEAS (USP-SP); Caracterizacao quimica e radiologica de refeicoes servidas pelo COSEAS/USP-SP

    Energy Technology Data Exchange (ETDEWEB)

    Favaro, Deborah Ines Teixeira [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), SP (Brazil). Centro do Reator de Pesquisas. Lab. de Analise por Ativacao Neutronica], e-mail: defavaro@ipen.br; Chioccola, Gabriella Saitta; Bortoli, Maritsa; Cozzolino, Silvia Maria Franciscato [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Ciencias Farmaceuticas. Lab. de Alimentos e Nutricao Experimental; Taddei, Maria Helena [Comissao Nacional de Energia Nuclear (CNEN), Pocos de Caldas, MG (Brazil). Coordenacao do Laboratrio de Pocos de Caldas (COLAB); Mazzilli, Barbara Paci [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), SP (Brazil). Div. de Radiometria Ambiental

    2009-01-15

    This study presents the results obtained for the chemical and radiological analyses of lunch meals served in the cafeteria at the University of Sao Paulo-USP (COSEAS restaurant) in Brazil, on 5 non-consecutive days. On each of the five days, the meals were collected in triplicate and then freeze-dried for analysis totalizing 15 samples. The determination of the proximate composition complied with the AOAC standardized methodologies. The content of Ca, Fe, K, Na, Se, and Zn was determined by instrumental neutron activation analysis and the method validation was performed by certified reference materials analyses. Based on the concentration data, the daily intake of each mineral was calculated (corresponding to 40% of the total daily intake) and compared to the new recommendations set by the National Research Council (USA) considering the 19-30 year-old women range group. Comparing the average values obtained in this study with the recommended values, it was possible to verify that for macronutrients and the micronutrients Fe, Se, and Zn the recommendations were followed; for Ca and K they were deficient and exceeded the recommendation value for Na. The radionuclides {sup 40}K, {sup 60}Co, {sup 137}Cs, and {sup 131}I were determined by gamma spectrometry; {sup 90}Sr by liquid scintillation and {sup 210}Po, {sup 234}U, {sup 232}Th, {sup 238}U, {sup 235}U, {sup 228}Th, {sup 230}Th, and {sup 232}Th by alpha spectrometry. All radionuclides are present in concentrations below the limits set by the Food and Agriculture Organization (FAO). (author)

  11. Creació d'una eina informàtica per a la resolució de problemes d'Enginyeria Quimica

    Directory of Open Access Journals (Sweden)

    M. Isabel Vázquez Navarro

    2008-12-01

    Full Text Available El objetivo de este proyecto es crear una aplicación en web con una amplia colección de problemas de balances de materia. La herramienta potencia que el estudiante aprenda a resolver estos problemas de forma sistemática y le proporciona un mecanismo de resolución guiado, incidiendo en la metodología y pasos a seguir. Los profesores introducen los problemas de forma interactiva y automatizada. La resolución por el estudiante sigue unos pasos guiados pero dejando la máxima capacidad de decisión al mismo. Durante la resolución el estudiante es informado de los errores cometidos y se le proporcionan ayudas.

  12. Explicaciones y argumentos de profesores de quimica en formación inicial: la construcción de criterios para su evaluación

    Directory of Open Access Journals (Sweden)

    Natalia Ospina Quintero

    2011-01-01

    Full Text Available El presente documento se deriva de una investigación didáctica (Martínez y Ospina, 2008 en la que se propuso una estrategia para enseñar termodinámica a profesores de química en formación inicial. Se pretende mostrar la construcción de los criterios de evaluación diseñados con el objetivo de determinar la incidencia de las habilidades cognitivolingüísticas (Jorba, Gómez and Prat, 2000 en el aprendizaje de conceptos asociados a procesos fisicoquímicos.

  13. Caracterización Antimicrobiana Y Fisico-Quimica De Muestras De Propoleo Proveniente De La Región Andina Colombiana

    Directory of Open Access Journals (Sweden)

    E Bastos

    2011-01-01

    Full Text Available El propóleo es un material resinoso, de origen animal, producido por las abejas a partir de diversos materiales vegetales. El objetivo de este trabajo fue caracterizar muestras de propoleo provenientes de la región  andina Colombiana respecto a su perfil antimicrobiano y físico-químico. Fueron empleados extractos etanólicos de propóleos por la técnica de disco- difusión, frente a las especies Eschericia coli, S.aureus y Candida albicans. Para la caracterización físico-química se evaluo el porcentaje de extracto seco, contenidio de cera, índice de oxidación y determinación cuantitativa de compuestos fenólicos y flavonoides. Todas las muestras presentaron actividad antibacteriana, con halos de inhibición comprendidos entre 8 y 12 mm para E. coli y entre 8,3 y  23,5 mm para S. aureus, no se observo ninguna actividad para C. albicans. Los parámetros fisico-químicos citados anteriormente presentaron una variación de 2,72 a 9,17%, 0 a 2%, 3 a 51s, 0,1 a 0,5 (p/p y 0,02 a 0,95 (p/p, respectivamente. El perfil antimicrobiano observado, relacionado al físico-químico, sugiere la necesidad de nuevos estudios para la determinación del origen botánico y geográfico de las muestras estudiadas.

  14. Explicaciones y argumentos de profesores de quimica en formación inicial: la construcción de criterios para su evaluación

    Directory of Open Access Journals (Sweden)

    Natalia Ospina Quintero

    2011-01-01

    Full Text Available El presente documento se deriva de una investigación didáctica (Martínez y Ospina, 2008 en la que se propuso una estrategia para enseñar termodinámica a profesores de química en formación inicial. Se pretende mostrar la construcción de los criterios de evaluación diseñados con el objetivo de determinar la incidencia de lashabilidades cognitivolingüísticas (Jorba, Gómez and Prat, 2000 en el aprendizaje de conceptos asociados a procesos fisicoquímicos

  15. ELABORAÇÃO E CARACTERIZAÇÃO FÍSICO-QUIMICA E SENSORIAL DE ESTRUTURADOS DE POLPA CONCENTRADA DE ABACAXI

    Directory of Open Access Journals (Sweden)

    Johnatt Alan Rocha de OLIVEIRA

    2012-01-01

    Full Text Available Este trabalho teve por objetivo estudar o procedimento de estruturação de polpa concentrada de abacaxi, empregando-se diferentes hidrocoloides e altas concentrações de polpa de abacaxi. Os hidrocoloides utilizados foram: pectina de baixa metoxilação, gelatina, ágar-ágar e alginato de sódio. Utilizou-se como processo para concentração da polpa a desidratação osmótica e a concentração por evaporação á vácuo. O fruto in natura foi submetido a análises físico-químicas e para os estruturados foram realizadas análises físico-químicas e sensoriais. Os resultados mostraram ser possível obter estruturados a partir de polpa concentrada de abacaxi, com concentrações significativas de vitamina C, proteína e fibra. Quanto à análise sensorial, os estruturados de abacaxi obtiveram elevada aceitação por parte dos possíveis compradores, apresentando índices elevados de intenção de compra, com cerca de 90% dos provadores que afirmaram que certamente ou possivelmente comprariam o produto se o encontrassem à venda.

  16. Caracterización Quimica de material particulado fraciión respirable pm 10 en la atmósfera de Rioacha la Guajira Colombia

    Directory of Open Access Journals (Sweden)

    Calos Julio Doria Argumedo

    2017-01-01

    Full Text Available Teniendo en cuenta la importancia desde el punto de vista de la contaminación ambiental, que tienen las partículas inhalables PM 10 en ambientes urbanos, y que los efectos que se puedan generar en la salud dependen de la composición química del material formado por partículas, se realizó este estudio con el objetivo de revelar la composición química de las partículas atmosféricas a través de técnicas de Espectrofotometría UV-VIS y Espectrometría de Masas con fuente de Plasma de Acoplamiento, generados principalmente por fuentes naturales y antrópicas en la ciudad de Riohacha al norte de Colombia; para ello se recolectaron 30 muestras de partículas atmosféricas por medio de filtros de cuarzo con una frecuencia mensual, durante el período de marzo a diciembre de 2014. Las PM 10 presentan una concentración promedio de 52,9 µg/m 3 y los iones solubles de mayor concentración corresponden a Na + , Cl - , Ca +2 y Mg +2 . Las diferencias entre los sitios de muestreo no fueron significativas (p> 0,6. El 70% del Ca +2 es de origen no marino, atribuyéndose al suelo y al tráfico vehicular y peatonal. Conocer la composición química del material particulado, PM 10 tiene relevancia no sólo desde el punto de vista de la química de la atmósfera, sino también sobre la calidad del aire que se respira en las ciudades.

  17. COMPOSICION QUIMICA Y CONCENTRACION DE PRECURSORES DE ACIDO RUMENICO Y VACCENICO EN FORRAJES ALTERNATIVOS PARA LA ALIMENTACION DE RUMIANTES EN ECOSISTEMAS ARIDOS

    Directory of Open Access Journals (Sweden)

    Ricardo Ortega Pérez

    2009-07-01

    Full Text Available Se determinó el valor nutrimental de alfalfa henificada (AH, dos genotipos de fríjol yorimón [IT90K-277-2 (FYG18 y Sesenteño (FYG25], un clon de pasto taiwán (PT, un cultivar local de nopal en dos presentaciones, pencas tiernas de 15 días de edad o ";;;nopalitos";;; (NT y pencas maduras (NM de 60 días de edad y germinado de semillas de maíz (GM del genotipo ASGROW 7573. Se cuantificó el contenido de materia seca (MS, proteína cruda (PC, lípidos totales (LT, cenizas (C, fibra cruda (FC y energía bruta (EB, así como la concentración de ácido linoleico (LA, ácido α-linolénico (ALA, ácidos grasos poliinsaturados (PUFA y ácidos grasos n-3. Los resultados revelan que los genotipos de frijol yorimón FYG25 y FYG18, mostraron el mayor contenido de PC. Respecto a la concentración de LT, el genotipo de yorimón FYG25 mostró la mayor cantidad seguido del FYG18 y AH. Los forrajes verdes de frijol yorimón (FYG25 y FYG18, así como el pasto Taiwán tuvieron el contenido mayor de ácido α-linolénico. Las semillas de germinado de maíz mostraron los contenidos mayores de ácido linolénico seguido del nopal tierno. Ambos ácidos grasos poliinsaturados (ALA y LA son precursores del ácido ruménico y del ácido vaccénico en rumiantes. Por lo tanto, el uso de estos forrajes verdes en la alimentación de rumiantes es una alternativa que podría modificar las proporciones de ácido grasos en la leche y la carne con el propósito de incrementar los PUFA, específicamente el ácido ruménico así como el ácido vaccénico.

  18. Chemical characterization of diets consumed in the COSEAS restaurant, by neutron activation analysis; Caracterizacao quimica de dietas consumidas no restaurante do COSEAS/USP-SP, por ativacao neutronica

    Energy Technology Data Exchange (ETDEWEB)

    Favaro, Deborah I.T. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Lab. de Analise por Ativacao Neutronica]. E-mail: defavaro@ipen.br; Chioccola, Gabriella S.; Bortoli, Maritsa C.; Cozzolino, Silvia M.F. [Sao Paulo Univ., SP (Brazil). Faculdade de Ciencias Farmaceuticas. Lab. de Alimentos e Nutricao Experimental]. E-mail: gabich@usp.br

    2005-07-01

    This study presents the results of chemical characterization of meals (lunch) offered by COSEAS/USP-SP restaurant, during 5 non consecutive days. These meals were collected in triplicate, in the same way they are offered to the users, being freeze-dried and prepared for chemical analysis. In the total, 15 samples were collected. The proximate composition was determined by using the standard methodologies according to AOAC (1995). The contents of some micronutrients (Ca, Fe, K, Na, Se and Zn) were determined by instrumental neutron activation analysis. The methodology validation was performed by certified reference materials analyses: Oyster Tissue (NIST SRM 1566{sup b}), Orchard Leaves (NIST SRM 1541) and Peach Leaves (NIST SRM 1547). >From concentration results the daily intake of each micronutrient was calculated considering this meal as 40% of the total daily intake and the values were compared to the new dietary recommendations of micronutrients (Dietary Reference Intakes-DRIs, Institute of Medicine, USA), for the women in the life stage from 19 to 30 years. Comparing the average values found with the recommended values, it was verified that macronutrients and Fe, Se and Zn micronutrients reached the values set by new DRIs. For Ca and K the daily intake was inadequate and Na, exceeded the recommended value. (author)

  19. Semiquantitative and quantitative measurements for EDXRF in elemental chemical composition of pigments; Medidas semi-quantitativas e quantitativas por EDXRF em composicao quimica elementar de pigmentos

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Elizabeth Cristina Soares da

    2005-02-15

    X-Ray fluorescence technique is largely used in the characterization of art and archaeological objects for restoration and conservation, allowing a multi-elemental, simultaneous and non destructive analysis. In this work it was used a portable XRF equipment of XRF that consists of a {sup 238} Pu source ( 13,6 and 17,2 keV; 95 mCi) and a SI-PIN detector coupled to a 8 k multichannel analyser. The results were collected by a palmtop computer and later analysed in a PC, through the program AXIL-QXAS. The acquisition time for each measurement was 500 s. The measurements were accomplished in a wood sculpture (Santa Luzia image, number 164) from the collection of the Museu de Etnologia da Universidade de Sao Paulo (MAE-USP), in the following regions: (STL1) inferior side of the wood base exposed without finishing, (STL2) frontal inferior base of the pedestal (dark blue) (STL3), inferior part of the frontal dress (gold), (STL4) medium part of the dress (clear blue) (STL5) mantle (red), (STL6) back central lock of the hair in the backs (black), (STL7) right cheek (flesh-coloured) and (STL8) mantle (gold). The elements found in the STL1 region were: Al, Ca, Fe and a high concentration of Zn. In the region STL2 were found Al, C, Fe, Zn and the key element Cu. In the region STL3 - Ca, Zn and the key element Au. In the region STL4 it was found Zn and the key element Cu. In the region STL5 the key element S and Hg. In the region STL6 were found Fe, Ca, S and Hg. In the region STL 7 were found Al, Cu, Hg and Zn. In the region STL8 were found Ca, Al and Au, with high concentration. It was concluded that the possible pigments would be: STL2 and STL4 - CuCO{sub 3}. Cu(OH){sub 2} + ZnO; STL3 and STL8 - Au; STL5 - HgS, STL6 - HgS mixed with other oxides, possibly of Fe and Mn, and STL 7 - HgS + ZnO. Standard samples of wood painted with pigments of the colors white, blue, red, rose, flesh color and green were also made. Through the XRF method it was verified that the white pigment is TiO{sub 2}, the red one is SeS, rose and flesh colors are a mixture of the red and white pigment, and the blue one is CoO Al{sub 2}O{sub 3}. Through the concentrations of the elementary composition of the pigments on the wood samples it was possible to calculate the sensitivity curve of the system in order to obtain quantitative data. But there are some difficulties to perform this calibration, since the sample is infinite and the disposition of layers is not uniform. It was not found papers about pigments using portable XRF in art and archaeological objects in the Brazilian literature. (author)

  20. Mineral chemistry in inerted layers of red mud from Hydro Alunorte; Quimica-mineral das camadas inertizadas em lama vermelha da Hydro Alunorte

    Energy Technology Data Exchange (ETDEWEB)

    Pinheiro, Erika Raiol; Fernandez, Oscar Jesus Choque; Costa, Josivaldo Chaves, E-mail: raiolerika@hotmail.com [Instituto Federal de Educacao, Ciencia e Tecnologia do Para (IFPA), Belem, PR (Brazil)

    2016-07-01

    In this study were carried out the mineral chemistry variations in samples of the different depths and deposition time of the red mud solids from Hydro ALUNORTE Para. Red mud samples were analyzed by X-ray diffraction and fluorescence. The predominant chemical compositions are: iron, sodium and titanium oxides, residual alumina and silica. Similar phases along the profiles layers are similar and are represented by hematite, anatase, goethite, sodalite and quartz. Sometimes occur calcite, zircon, cristobalite and gypsum. The iron percentage increases in the deeper layers as well as the residual silica and alumina decrease with depth. The titanium oxide had constant. The pH of the samples ranged from 9.9 to 11. The predominant size particles are < 74 micrometers. The study shows the possibility of working with this residue in other applicability observing its characteristics. (author)

  1. Rock analyzes that could be key in biofuel production: student expands research in Germany: Escuela de Quimica sent to posgraduate student at Leipzig University

    International Nuclear Information System (INIS)

    O'neal Coto, Katzt; Puente Urbina, Allen

    2014-01-01

    University student of posgraduate in chemistry at the Universidad de Costa Rica has done an internship at the Universitat Leipzig, Germany. All the facilities were given to analyze samples of a type of sedimentary rock known as diatomite. The Nuclear Magnetic Resonance of Xenon was used to remove the fatty acids present in vegetable oil or animal fat used in the production of biodiesel [es

  2. 7. Seminar of the IIE-IMP-ININ on technological specialities. Topic 8: Analytical Chemistry; 7. Seminario IIE-IMP-ININ sobre especialidades tecnologicas. Mesa 8: Quimica Analitica

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-31

    With the purpose to give continuity to the exchange of experiences and to impel the development of common specialties among IIE-ININ-IMP, the VII Seminary was held in Mexico City on September 7, 1994. In the event were present 163 researchers of the three participant Institutions as well as representative persons of invited institutions. The objective of this Seminary was to relate the researchers of a common branch, with the idea that the specialists made an exchange of experiences, in order to establish cooperation routes. The event was arranged in 11 working tables, with a total of 111 papers: 43 of these papers were from IIE, 42 from IMP, 22 from ININ and 4 from invited entities. During the Seminary, the 11 working tables has sessions simultaneously, and each one of the papers were discussed at the time that possible future cooperating inter institutional actions were examined. The conclusions of the Seminary were exposed in a plenary session, in the presence of the directing boards of the three participant Institutions.

  3. Caracterización Quimica de material particulado fraciión respirable pm 10 en la atmósfera de Rioacha la Guajira Colombia

    OpenAIRE

    Calos Julio Doria Argumedo; Juan Reynerio Fagundo Castillo

    2017-01-01

    Teniendo en cuenta la importancia desde el punto de vista de la contaminación ambiental, que tienen las partículas inhalables PM 10 en ambientes urbanos, y que los efectos que se puedan generar en la salud dependen de la composición química del material formado por partículas, se realizó este estudio con el objetivo de revelar la composición química de las partículas atmosféricas a través de técnicas de Espectrofotometría UV-VIS y Espectrometría de Masas con fuente de Plasma de Acoplamiento, ...

  4. Physico-chemistry characteristics of compost from urban solid wastes in Valencia (Spain); Caracteristicas fisico-quimicas de los composts de residuos solidos urbanos de la Comunidad Valenciana

    Energy Technology Data Exchange (ETDEWEB)

    Albiach, M. R.; Canet, R.; Pomares, F.; Tarazona, F.; Chaves, C.; Ferrer, E.

    2004-07-01

    For nearly twenty years samples of MSW compost produced in the Valencia region. have been analysed in our laboratories. Their main characteristics are summarised and discussed in this article, which reveals their compliance with current regulations, but also the problems which may arise if stricter requirements are eventually applied by the European Commission. (Author)

  5. Electronic waste: chemical characterization glasses of tubes cathode rays with viability for recycling; Lixo eletronico: caracterizacao quimica dos vidros de tubos de raios catodicos com viabilidade para reciclagem

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Norma Maria O.; Morais, Crislene R. Silva, E-mail: normalimam@ig.com.br [Universidade Federal de Campina Grande (UFCG), Campina Grande, PB (Brazil). Unidade Academica de Engenharia de Materiais; Lima, Lenilde Mergia Ribeiro [Universidade Federal de Campina Grande (UATEC/UFCG), Campina Grande, PB (Brazil). Unidade Academica de Tecnologia do Desenvolvimento

    2011-07-01

    Electronic waste, or e-waste, often makes incorrect destinations, which causes serious environmental problems. The aim of this study was to analyze the X-ray fluorescence to study the recycling technology for the glass of Cathode Ray Tubes or, popularly, 'picture tubes', identified by the acronym CRT (Cathode Ray Tubes), which integrate computer monitors. It was observed that the glass screen and funnel analyzed have different chemical compositions. As the silicon oxide (SiO2), the largest component of these glasses percentage 59.89% and 48.63% respectively for the screen and funnel this oxide is responsible for forming the vitreous network. The study of recycling of computer monitors it is important, since about 45% of existing materials on a monitor are made of glass, since it is 100% recyclable and can be reused, thus reducing the amount of waste deposited in the environment. (author)

  6. Process of chemical recycling of post-consumer PET using a factorial design; Processo de reciclagem quimica do PET pos-consumo empregando o planejamento fatorial

    Energy Technology Data Exchange (ETDEWEB)

    Lacerda, Carlos Eduardo de O.; Almeida, Yeda Medeiros B. de; Vinhas, Gloria M., E-mail: carlos.olacerda@hotmail.com [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2015-07-01

    The present study investigated important variables in the depolymerization reaction of post-consumer poly (ethylene terephthalate) - PET via alkaline hydrolysis. Through this reaction is obtained terephthalic acid (PTA), a monomer, which when purified, is used for the production of PET resin. The study was based on a 2{sup 2} factorial design in which the independent variables were the concentration of NaOH solution and the reaction time, and the dependent variable was the yield of PTA obtained. The experiments that generated the best results, 100 % of yield, were obtained with the higher values of the independent variables. Statistical analysis showed that the concentration of NaOH solution is the variable that most influences in the process. The PTA obtained was analyzed by NMR ¹H technique, confirming the strong resemblance to commercial PTA obtained by petrochemical way. (author)

  7. As razões do laissez-faire: uma análise do ataque ao mercantilismo e da defesa da liberdade econômica na Riqueza das Nações

    Directory of Open Access Journals (Sweden)

    Laura Valladão de Mattos

    2007-01-01

    Full Text Available The reasons of the laissez-faire: an analysis of the attack to mercantilism and of the defense of economic liberty in The Wealth of Nations. The main reasons presented in The Wealth of Nations to advocate the system of economic liberty and reject mercantilism are analyzed. These two systems are evaluated considering basically their impact on the annual product, and the degree of liberty and justice they engender. Based on his views of man and of capital hierarchy, Smith defends the superiority of economic liberty in what concerns the growth of the annual product. This system is also considered superior to mercantilism in terms of justice since it does not privilege any sector of society and allows a great level of liberty to the individuals.

  8. Silêncios e diálogos: o catolicismo e a defesa dos direitos sociais e humanos ante à intolerância política da ditadura militar no Brasil (1964-1985

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    Lucília de Almeida Neves

    2009-05-01

    Full Text Available Os anos 1964-1985 se caracterizam pela mobilização popular e pela emergência de uma poderosa vontade de mudança social. Queria-se uma libertação das opressões históricas que a maioria do povo vinha sofrendo. Paradoxalmente, foi um tempo de autoritarismo e desrespeito aos direitos sociais e humanos. Este trabalho pretende analisar o movimento do catolicismo brasileiro, especialmente sua luta por esses direitos. Diversos aspectos atuam e influenciam no contexto político-religioso desse período. A reconstrução do significado desse movimento valeu-se de ampla documentação. Apesar dos entraves e das limitações, o catolicismo fez seu percurso e assinalou um passo importante na trajetória histórica desse período. Na compreensão e análise desse caminho, está a proposta deste estudo.Palabras clave: Catolicismo; Direitos sociais e humanos.ABSTRACTThe years 1964-1985 were characterised by popular mobilisation and the emergence of a powerful wish for social change, in the sence of a liberation from historical oppressions suffered by most people. Paradoxically, it was a time of authoritarianism and disregard for social and human rights. This paper aims at analysing the movemnt of Brazilian Catholicism, especially its fight for those rights. Various aspects play a part in and influence the political and religious context of that period. A wide range of documents was used for reconstructing the meaning of that movement. Despite hindrances and constraints, Catholicism made its way and pointed out an important step in the historical development of the period. This paper aims at understanding and analysing that way.Key words: Catholicism; Social and human rights.

  9. Acurácia dos indicadores de risco do Programa de Defesa da Vida dos Lactentes em região do Estado de São Paulo, Brasil

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    Davi Rumel

    1992-02-01

    Full Text Available O Programa de Desfesa da Vida dos Lactentes da Secretaria de Higiene e Saúde do Munícipio de Bauru tem um critério diagnóstico para a inclusão de recém-nascidos dentro do programa. Este critério é formado pela combinação de 11 indicadores clínicos e sociais de risco à mortalidade infantil de fácil obtenção no momento do parto. Decidiu-se propor um critério diagnóstico alternativo, a partir dos mesmos indicadores clínicos e sociais, com maior sensibilidade para a mesma proporção de crianças matriculadas no Programa. Os dados hospitalares foram coletados no período de 11 de maio de 1986 a 10 de novembro de 1987. A mortalidade compreende o período entre 7 dias e 6 meses, que é o período de seguimento das crianças pelo Programa. Calculou-se para cada indicador o risco relativo bruto numa análise univariada e o risco relativo ajustado pela técnica de regressão logística. Criou-se um sistema de pontuação baseado na somatória dos excessos de risco de cada indicador.

  10. Ação da inoculação de hemolinfa no mecanismo de defesa de Biomphalaria tenagophila (Orbigny, 1835 The effect of hemolymph inoculation on the defense mechanism of Biomphalaria tenagophila (Orbigny, 1835

    Directory of Open Access Journals (Sweden)

    Soely Maria Pissini Machado Reis

    1995-08-01

    Full Text Available Estudou-se a resistência à infecção pelo S. mansoni em moluscos B. tenagophila inoculados com vários tipos de hemolinfa provenientes de moluscos infectados por S. mansoni da linhagem SJ ou por outros trematódeos avaliando-se, nestas circunstâncias, o comportamento dos amebócitos. Concluiu-se que dois tipos de mecanismos teriam agido provocando resistência à infecção pelo S. mansoni: celular e humoral. A reação do tipo celular ocorreu quando os moluscos eram inoculados com hemolinfa de moluscos infectados por S. mansoni B. tenagophila inoculadas com hemolinfa de moluscos infectados por furcocercárias longifurcadas sem ocelos, apresentaram elevada resistência à infecção posterior por S.mansoni.The resistance of B. tenagophila snails to infection by Schistosoma mansoni was studied. These snails had been previously inoculated with hemolymph talsen from other snails infected by S. mansoni of SJ strain or by other trematodes. The findings suggest that two types - cellular and humoral - are responsible for the resistance to infection by S. mansoni. The cellular response occurred when the snails were inoculated with hemolymph from snails infected by S. mansoni. B. tenagophila inoculate with hemolymph from snails infected by furcocercariae without eye-spot, also showed resistance to the infection by S. mansoni. In this latter case, the degenerated sporocysts were not enveloped by amebocitary reaction, leading to the conclusion that humoral factors could be involved.

  11. Inibição da colonização por Bradyrhizobium elkanii mas não por Glomus intraradices em soja pelo ativador de defesa vegetal BTH

    Directory of Open Access Journals (Sweden)

    Hoffmann Lúcia Vieira

    2001-01-01

    Full Text Available O produto BTH controla doenças através da ativação dos mecanismos de resistência de plantas, cujo modo de ação tem sido caracterizado através da identificação de genes ou enzimas ativados durante esta reação. Os mesmos genes e enzimas podem ser ativados como parte da reação das plantas à colonização por microssimbiontes mutualistas. Então, a aplicação de BTH pode inibir também essas simbioses. Um experimento foi conduzido para verificar se BTH tem efeito sobre a colonização de raízes de soja pelos microssimbiontes Glomus intraradices e Bradyrhizobium elkanii. Plantas controle ou inoculadas com o fungo micorrízico ou rizóbio foram tratadas com 20 mL de BTH 25 mg L-1 por meio da aplicação em sementes, via radicular ou via foliar. As plantas que receberam aplicação radicular de BTH tiveram desenvolvimento vegetativo reduzido. A colonização de raízes por B. elkanii foi menor nas plantas que receberam aplicação de BTH via radicular do que naquelas não tratadas ou tratadas por via foliar apenas. A colonização de raízes de soja por G. intraradices não foi afetada por BTH em quaisquer dos modos de aplicação. A aplicação radicular de BTH deve ser evitada na cultura da soja. Não há indício de restrição de aplicação foliar do produto.

  12. Morfologia, comportamento, parasitismo e mecanismos de defesa dos imaturos de Heraclides anchisiades capys (Hübner(Lepidoptera, Papilionidae Morphology, behaviour, parasitism and mechanisms of defense of the immatures of Heraclides anchisiades capys (Hübner (Lepidoptera, Papilionidae

    Directory of Open Access Journals (Sweden)

    Luis Anderson Ribeiro Leite

    2010-06-01

    Full Text Available Heraclides anchisiades capys é uma espécie comum de Papilionidae, cujas larvas se alimentam de várias espécies de Citrus spp. (Rutaceae. Neste estudo são descritas a morfologia e dados sobre a história natural dos imaturos através de ilustrações, incluindo fotografias em microscopia eletrônica de varredura.Heraclides anchisiades capys is a common species among the Papilionidae, whose larvae feed on various species of Citrus spp. (Rutaceae. In this study the morphology and data on natural history of the immature stages of this species are described with illustrations, including photos in scanning electronic microscope.

  13. Negociações Multilaterais do Comércio de Serviços, Intervenção Estatal Brasileira e Defesa dos Interesses Nacionais - 10.5102/uri.v4i2.227

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    Fátima Faro

    2007-10-01

    Full Text Available The purpose of this article is to discuss the evolution of the multilateral negotiations focused on trade of services, as well as the Brazilian governmental politics to emphasize the development of this economic activity, and to support our participation within the bilateral and multilateral rounds of negotiation, from an individual country perspective, according to the national point of view.

  14. Anísio Teixeira entre nós: a defesa da educação como direito de todos Anísio Teixeira: defending education as a universal right

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    Clarice Nunes

    2000-12-01

    Full Text Available O objetivo do artigo é realizar uma reflexão sobre a vida e a obra de Anísio Teixeira (1900-1971, na comemoração do seu centenário de nascimento, destacando momentos decisivos da sua biografia, suas motivações como educador, aspectos da sua apropriação de John Dewey e a atualidade das suas concepções para pensar a educação brasileira contemporânea.The objective this article is to look back on Anísio Teixeira's life and work (1900-1971, on the 100th anniversary of his birth, including decisive moments in his biography, his motivations as an educator, different aspects of his appropriation of John Dewey's work, and the usefulness of his conceptions for reflecting on contemporary Brazilian education.

  15. Defense of concurrence in the natural gas sector: actual features, problems and proposes of solution; Defesa da concorrencia no setor de gas natural: aspectos atuais, problemas e propostas de solucao

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Anderson; Sandes, Ingrid [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Faculdade de Direito

    2004-07-01

    The present paper discusses the enforcement of the antitrust law on oil and gas market. The importance of this theme refers to the open of oil and gas market after the constitutional amendment NBR. 09, by making the flexibilization of monopoly on oil and gas reservoirs and introducing the concurrence in this market. The amendment changed also the relationship between State and oil market by leaving the direct action on economy for indirect action and constituting a regulation authority, ANP. Thus, the paper studies the role of the Brazilian antitrust and regulation authorities in the defense of concurrence and the relationship between antitrust enforcement and regulation in the Brazilian oil market scenario. (author)

  16. Herbert Marcuse and the defense of the revolutionary violence in the 60's Herbert Marcuse e a defesa da violência revolucionária nos anos 60

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    Maria Ribeiro do Valle

    2007-05-01

    Full Text Available Our work is centered in the debate about the importance of the “revolutionary” violence in the 60’s according to Herbert Marcuse, a well-known intellectual who lived and discussed that period. It presents the restatement of the anticapitalistic utopias of the XIX century – particularly the Marxist one. Marcuse also emphasizes the urgent combat against the North American imperialism - a flag carried by the protest movements of the time – arguing that violence is inherent to the political and economical system and, therefore, the opposition must fight it by means of the “revolutionary violence”. Keywords: Violence. Rationality. Revolution. Socialism. Imperialism. Nosso trabalho está centrado no debate sobre a violência “revolucionária”travado por Marcuse, expoente significativo da intelectualidade que vivenciou e pensou os anos 60. Há a retomada, então, das utopias anticapitalistas do século XIX – particularmente a marxista. Marcuse aponta também para a urgência do combate ao imperialismo norte-americano – bandeira de luta carregada pelos movimentos de protesto neste período – argumentando que a violência é inerente ao sistema político-econômico, e que deve ser combatida através da violência “revolucionária” pela oposição. Palavras-chave: Violência. Razão. Revolução. Socialismo. Imperialismo.

  17. Defesa química: histórico, classificação dos agentes de guerra e ação dos neurotóxicos

    Directory of Open Access Journals (Sweden)

    Gustavo Rocha Silva

    2012-01-01

    Full Text Available Chemical agents are substances used for their toxic effects on humans, animals and plants. The main objective of chemical defense is to develop systems that reduce these effects while minimizing impact on the operational capacity of military troops. In this work, a report on the development of chemical warfare agents since the First World War and their classification is presented. Special attention is given to neurotoxic agents, the most lethal group of chemical agents known to date.

  18. A pedagogia histórico-crítica e a defesa da transmissão do saber elaborado: apontamentos acerca do método pedagógico

    Directory of Open Access Journals (Sweden)

    Tiago Nicola Lavoura

    2015-06-01

    Full Text Available http://dx.doi.org/10.5007/2175-795X.2015v33n1p345 Este artigo possui como objetivo realizar uma discussão acerca do método pedagógico da pedagogia histórico-crítica, notadamente elucidando as bases de sua fundamentação referenciadas no Método da Economia Política elaborado por Marx na famosa Introdução de 1857. Desta feita, explicita-se o movimento do conhecimento como a passagem do empírico ao concreto pela mediação do abstrato, evidenciando o caráter mediador da educação na prática social, tomando esta como ponto de partida e ponto de chegada do trabalho educativo, tendo-se como momentos intermediários do método pedagógico a problematização desta prática social, a instrumentalização por meio da transmissão dos conhecimentos nas suas formas mais elaboradas e a catarse enquanto síntese de desenvolvimento do aluno e, consequentemente, a possibilidade de alteração da prática social humano-genérica. Assim, busca-se evidenciar a lógica dialética desta proposta pedagógica que defende a atividade de ensino na educação escolar como aquela responsável pela reprodução ideal do movimento real dos conteúdos escolares, permitindo o alcance da riqueza categorial dos objetos de ensino enquanto síntese de múltiplas determinações e relações numerosas. Nesse sentido, compreender o método pedagógico dessa teoria em consonância com os fundamentos do materialismo histórico-dialético é essencial para sua realização bem sucedida e coerente com sua proposição. Historical-critical pedagogy and the defense of elaborate knowledge transmission: notes on pedagogical method  Abstract This article aims to carry out a discussion about pedagogical method of historical-critical pedagogy, clearly highlighting its fundaments on Political Economy Method, created by Karl Marx in his famous 1857. Thus, the study seeks to make clear the dialectical logic of this pedagogical  proposal that speaks up for the teaching activity in school education as that responsible by the ideal reproduction of the real school subjects movement, enabling the reach of categorical wealth of teaching objects as synthesis of multiple determinations and numerous relationship. So, it is made explicit the movement of knowledge as the passage from the empirical to the concrete by abstract mediation, highlighting the mediating character of education in social practice, taking this as a starting point and end point of the educational work, taking the questioning of this social practice as intermediate moments of pedagogical method , the manipulation through the transmission of knowledge in its most elaborate forms and catharsis as student development synthesis and consequently the possibility of changing human-generic social practice. In this sense, understanding the pedagogical method of this theory founded on Historical-Dialectical Materialism is essential to successfully and coherently carry out its proposition. Keywords: School Education. Historical-critical Pedagogy. Dialectical Method.   La pedagogía histórica-crítica y la defensa de la transmisión del saber elaborado: anotaciones sobre el método pedagógico  Resumen El objetivo del artículo es realizar una discusión sobre el método pedagógico de la pedagogía histórica-crítica, explicado en las bases de su fundamentación referenciada en el Método de la Economía Política elaborado por Marx en la famosa Introducción de 1857. De este modo, se explicita el movimiento del conocimiento como el paso de lo empírico a lo concreto a través de la mediación de lo abstracto, resaltando el carácter mediador de la educación en la práctica social, tomándola como punto de partida y punto de llegada del trabajo educativo, teniendo como momentos intermedios del método pedagógico el problematizar esta práctica social, la instrumentalización a través de la transmisión de los conocimientos en sus formas más elaboradas y la catarsis, como síntesis de desarrollo del alumno y, como consecuencia, la posibilidad de alteración de la práctica social humana-genérica. De este modo, se busca mostrar la lógica dialéctica de esta propuesta pedagógica que aboga la actividad de enseñanza en la educación escolar como aquella responsable por la reproducción ideal del movimiento real de los contenidos escolares, lo que permite el alcance de la riqueza categórica de los objetos de enseñanza, como síntesis de múltiples determinaciones y relaciones numerosas. En este sentido, comprender el método pedagógico de esta teoría en consonancia con los fundamentos del materialismo histórico-dialéctico es esencial para su éxito y coherencia con su proposición. Palabras claves: Educación Escolar. Pedagogía histórica-crítica. Método Dialéctico.

  19. Brazilian industry of natural gas: criteria for definition of relevant markets concerning the defense of competition; Industria brasileira do gas natural: criterios de definicao dos mercados relevantes para efeito de defesa da concorrencia

    Energy Technology Data Exchange (ETDEWEB)

    Mano, Gustavo; Tiryaki, Gisele Ferreira [Universidade de Salvador (UNIFACS), BA (Brazil)

    2008-07-01

    A key point in the examination of the legality of antitrust practices is the delimitation of the relevant markets where the economic relations object of the analysis take place. This is the basis for the evaluation of the market power of the agents involved and the possible harm to competition they may cause. This work offers a study of the criteria for the determination of the relevant market in the scope of the natural gas industry in Brazil. It aims at identifying the performance of the agencies taking part in the Brazilian Antitrust System (SBDC) with regards to the examination of the related antitrust practices. These agencies work in connection with the National Petroleum, Natural Gas and Biofuels Regulatory Agency (ANP), which is responsible for issuing technical reports on the subjects related to its area of competence. The analysis presented here has the main goal of verifying if the most important technical, operational and legal aspects are being adequately considered by the SBDC and ANP in the definition of the relevant markets as a basis for the judgment of the antitrust practices, and if they are coherent with the principles for fostering economic competition. The results points out that, despite the successful cooperation between the SBDC and the ANP, there are the used definition of the relevant markets for the natural gas industry still needs refinement. (author)

  20. Avaliação dos níveis séricos de anexina V e TNF-α em pacientes crônicos estáveis com esquizofrenia : uma defesa orquestrada?

    OpenAIRE

    Lenise Peixoto Petter Francesconi

    2010-01-01

    A esquizofrenia é um dos transtornos psiquiátricos mais importantes, porque afeta pessoas jovens, com evolução em geral para incapacitação funcional e prejuízo social, atingindo cerca de 1% da população. Apresenta igual distribuição entre os sexos, manifestando-se clinicamente no final da adolescência, tendo seu pico entre 15-25 anos, com um forte fator hereditário na sua etiologia. A farmacoterapia tem provado ser o ponto chave na terapêutica da esquizofrenia. É também conhecida a alta incid...

  1. International Conference (4th) on Nanostructured Materials Held in Stockholm, Sweden on 14-19 June 1998. Special Volume - Part A. Volume 12, Numbers 1-4, 1999

    Science.gov (United States)

    1998-06-19

    Investigaciones Quimicas and Dpto. Quimica Inorgänica. Centra de Investigaciones Cientificas Isla de la Cartuja. Avda. Americo Vespuccio s/n, 41092...Sevilla, Spain. 3 Dpto. de Quimica- Fisica , Universidad de Sevilla, C/Prof. Garcia Gonzalez s/n, 41012-Sevilla. Abstract—An electrochemical process has...AGGREGATES J.A. Sotelo* and G.A. Niklasson# *Dpto. de Fisica y Matematicas, Universidad Peruana Cayetano Heredia, Apto. 5045, Lima, Peru

  2. Proceedings of the International Congress (12th), Corrosion Control for Low-Cost Reliability, Held in Houston, Texas on September 19 -24, 1993. Volume 3B. Corrosion: Specific Issues

    Science.gov (United States)

    1993-09-24

    de Quimica Pura y Aplicada, Monterrey N.L., 1990. No. 47. 3.- 8. Valdez, G. Guerra, J. Sampedro, N. Rosas. CORROSION, Vol. 2, No. 3, 1991, pp. 11-15...AISI 304L AND 316L STAINLESS STEELS PREPARED BY POWDER METALLURGY. E. Otero Departamento de Ciencia de Materiales Facultad de Ciencias Quimicas ...Madrid, Spain. V. Utrilla Departamento de Ciencia de Materiales Facultad de Ciencias Quimicas Universidad Complutense 28040-Madrid, Spain. E. Sfienz

  3. Mechanisms of Laser Induced Reactions in Opaque Heterogeneous Environments

    Science.gov (United States)

    1993-11-01

    ST. Av. bonds, both within its own structure and also with Rovisco Pais. 109h Lisboa Codex. Portugal. §Present address: Centro de Quimica Pura e...and L. F. VIEIRA FERREIRA Centro de Quimica Fisica Molecular, Universidade Ttcnica de Lisboa. Complexo 1, Instituto Superior Tecnico, Av. Rovisco Pais...and Ana R. Garcia Centro de Quimica Fisica Molecular, Universidade Tecnica de Lisboa--Complexo I-IST. Av- Rovisco Pais, 1096 Lisboa Codex, Portugal

  4. International Symposium on Polymer Electrolytes (3rd) Held in Annecy, France on June 17-21, 1991. Extended Abstracts

    Science.gov (United States)

    1991-06-01

    ELECTROLYTES. J. Morgado, L. Alcicer Departamento de Engenharia Quimica , Instituto Superior T&nico P- 1096 Lisboa Codex, Portugal As previoulsy...Alcicer Departamento de Engenharia Quimica , Instituto Superior Tdcnico P-1096 Lisboa, Portugal (PEO)nZnX 2 films, in the range n=4-40 were prepared by...RARE EARTH SALTS T. M. A. Abrantes and L. Alcdcer Departamento de Engenharia Quimica , Instituto Superior Tcnico P;4096 Lisboa, Portugal L. A. Dias

  5. Cholesteric Liquid Crystal Glass Platinum Acetylides

    Science.gov (United States)

    2014-06-01

    M. Krein AFRL/RXAP Ronald F. Ziolo, Eduardo Arias, and Ivana Moggio 2Centro de Investigacion en Quimica Aplicada(CIQA) Albert Fratini... Quimica Aplicada(CIQA), Boulevard Enrique Reyna Albert Fratini - Department of Chemistry, University of Dayton Yuriy Garbovskiy and Anatoliy...Force Research Laboratory Materials and Manufacturing Directorate Wright-Patterson Air Force Base, OH 45433-7750 Centro de Investigacion en Quimica

  6. Co-Sponsorship of 1999 Conference on the Dynamics of Molecular Collision (17th) held in Lake Harmony, Pennslyvania on 18-23 July 1999.

    Science.gov (United States)

    2000-02-25

    Cambridge, Cambridge CB2 1EW, U.K. Fernando Castafio and Maria N. Sanchez Rayo Departamento de Quimica Fisica, Universidad del Pais Vasco, Apartado...Welge Fakultät für Physik. Universität Bielefeld, Germany F.J. Aoiz, L. Banares, J.F. Castillo, B. Marti’nez-Haya Departamento de Quimica Fisica...8656 Tokyo, Japan M A.J.C. Varandas • Departamento de Quimica Sangwoon Yoon Universidade de

  7. New Meta and Nanomaterials for Photorefractive Enhancement and Photorefractive Two-Beam Coupling

    Science.gov (United States)

    2010-03-12

    Centro de Investigacion de Quimica Aplicada Blvd. Enrique reyna, No. 140 Saltillo, Coahuila, Mexico 25253 AFOSR FA9550-09-1-0023 12 March 2010...ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER CENTRO DE INVESTIGACION EN QUIMICA APLICADA BLVD ENRIQUE REYNA NO 140 SALTILLO 25253...Photorefractive Two-Beam Coupling Ronald F. Ziolo Centro de Investigacion de Quimica Aplicada Saltillo, Coahuila, Mexico 25253 Grant

  8. Journal of Chemical Sciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Author Affiliations. Prithwiraj Byabartta1 2. Department of Chemistry, University of Burdwan, Golapbag, Burdwan 713 104; Departmento de Quimica Inorganica, Universidad de Zaragoza, Zaragoza 50009, Spain ...

  9. Iran: The Next Nuclear Threshold State?

    Science.gov (United States)

    2014-09-01

    Brazil, Ministry of Defense, National Strategy of Defense (Brazil: December 18, 2008) http://www.defesa.gov.br/projetosweb/ estrategia /arquivos...Ministry of Defense, 2008. http://www.defesa.gov.br/projetosweb/ estrategia /arquivos/estrategia_ defesa_nacional_ingles.pdf. Campbell, Kurt M., and

  10. Raman Investigation of Structural Photoinduced Irreversible Changes of Ga(10)Ge(25)S(65) Chalcogenide Glasses

    Science.gov (United States)

    2001-06-01

    Brazil cDepto de Quimica - Universidade Federal de Juiz de Fora, Juiz de Fora, MG- Brazil dEscola de Engenharia de Sao Carlos- - Universidade de Sao Paulo...Inorganic Materials IIC ASCR and ICT, Pelleova 24, Prague 6, Czech Republic blnstituto de Quimica - UNESP- C.P. 355, CEP: 14801-970, Araraquara, SP

  11. Development of New Photorefractive Polymer Materials

    Science.gov (United States)

    2015-05-19

    and the Di-OH-C8-PDI (Pery-OH) provided by Dr. Ziolo at Centro de Investigacion en Quimica Aplicada. Figure 19 shows absorbance measurements of the...Additional sensitizers were provided by Dr. Ziolo at Centro de Investigacion en Quimica Aplicada, Fe5PPV and 3BzC60, with molecules

  12. Silicon-Based Optoelectronic Materials, Symposium Held in San Francisco, California on April 12-14, 1993. Materials Research Society Symposium Proceedings, Volume 298

    Science.gov (United States)

    1993-12-14

    Pierre Basmaji and Sirgio C. Zilio Instituto de Ffsica e Quimica de Sio Carlos - USP Caixa Postal 369, 13560-970 - Sio Carlos, SP, Brazil "Vilnius...Ffsica e Quimica de Sko Carlos Departamento de Fisica e Ci~ncia dos Materiais Universidade de Sio Paulo, Caixa Postal 369 13560-970 Sio Carlos, SP

  13. National Fuel Cell Seminar (1983) Program and Abstracts Held at Orlando, Florida on 13-16 November 1983.

    Science.gov (United States)

    1983-01-01

    January 1982 - December 1983), supported by CNPq Brazil, carrying out research for Ph.D. degree in Chemistry from Instituto de Fisica e Quimica de Sao...Carlos, USP, Brazil. 2. Visiting Scientist at Los Alamos National Laboratory (May - July 1983) from Instituto de Fisica e Quimica de Sao Carlos, USP

  14. Journal of Chemical Sciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Lotfali Saghatforoush1 Laura Valencia Matarranz2 Firoozeh Chalabian3 Shahriare Ghammamy4 Fatemeh Katouzian5. Department of Chemistry, Payame Noor University, 19395-4697, Tehran, I.R. of Iran; Departamento de Quimica Inorganica, Facultad de Quimica, Universidade de Vigo, 36310 Vigo Pontevedra, Spain ...

  15. Determination of Methylmercury Traces in Biological Matrix: Chemical Extraction and Nuclear Quantification with the Neutron Activation Analysis Technique; Determinacion de Trazas de Metilmercurio en Matriz Biologica: Extracion Quimica y Cuantificacion Mediante la Tecnica Nuclear de Analisis por Activacion Neutronica (AANI)

    Energy Technology Data Exchange (ETDEWEB)

    Soldati, A L [Instituto Balseiro, Universidad Nacional de Cuyo, Centro Atomico Bariloche (Argentina)

    2002-07-01

    Mercury is present in the environment as a result of the human and natural activities.The total amount of Hg present in the biosphere has been incremented three times since the industrial era, and now it is affecting in a global sense all the ecosystem.One of the main entrance of Hg in the human diet is the consumption of fish and other marine creatures.Most of the ingested Hg is mono methylmercury (MeHg), which is one of the most toxic forms in which this element could be found because it crosses membranes.Since the toxicity levels are low, the determination of concentrations of total Hg and Me Hg require very careful sampling, sample conditioning and analytical procedures to prevent either losses or contamination, or the degradation of the Hg species.In this work, we implemented a chemical Me Hg extraction procedure, using a ionic exchange resin, with three different types of fish tissue: muscle, liver and hepato pancreas.After Me Hg extraction, the determination and quantification was made by Instrumental Neutron Activation Analysis, by measuring the {sup 197} Au, y el {sup 203} Tl deexcitation s, created through the radioactive decay of the isotopes {sup 197} Hg y {sup 203} Hg.The influence of several parameters on the overall extraction process, such as velocity of passage through the ionic exchange column and the acid concentration used in the extraction was evaluated.Regarding the INAA determinations, a choice was made for the irradiation, decay and counting times, neutron and gamma doses, and the counting geometry The detection limit found for this technique (dry weight) is 140 pg MeHg/g. The Hg contents of the muscle samples were measured with the 279 keV emission of the product of the {sup 202} Hg(n,g){sup 203} Hg reaction, with a recovery of (100 {+-} 13)%. Liver and Hepato pancreas samples were measured with the 77 keV gamma emission of the {sup 197} Hg, checking this result with the 67 y 69 keV X emissions from the same isotope.The liver samples needed an extra vacuum filtering process during the extraction.The filtering process was implemented and with no significant effects of losses or contamination.The recoveries obtained for both types of samples are close to 100%. However, due to the lower Hg contents in these samples, the uncertainties are higher than in the muscle samples measurements (20% for livers and 50% for hepato pancreas) because the Me Hg amounts analyzed are near the detection limit of this technique.

  16. Physical and chemical characterization of pastes of bone cements with ZrO{sub 2}; Caracterizacion fisica y quimica de pastas de cementos oseos con ZrO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Quinto H, A. [Instituto Tecnologico de Zacatepec, A.P. 45, 62900 Zacatepec, Morelos (Mexico); Pina B, M.C. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, A.P. 70-360, 04510 Mexico D.F. (Mexico)

    2003-07-01

    Setting times and temperature of sixteen calcium phosphate cements added with ZrO{sub 2} were evaluated. Their behaviors were analysed to be used like injectable formulations in surgery of bone. Two cements of calcium phosphates enriched with ZrO{sub 2} with the best characteristics in setting times and temperature, were mechanically tested after 1 and 7 days of prepared. Density was determined using a pycnometer, chemical composition was determined by X-ray diffraction and the molecular structure was determined by infrared spectroscopy. (Author)

  17. Extraction of pigments from seeds of Bixa orellana L.: an alternative for experimental courses in organic chemistry; Extracao de pigmentos das sementes de Bixa orellana L.: uma alternativa para disciplinas experimentais de quimica organica

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Charllyton Luis S. da; Chaves, Mariana H. [Piaui Univ., Teresina, PI (Brazil). Dept. de Quimica]. E-mail: mariana@ufpi.br

    2005-02-01

    This paper describes methodologies for the extraction and characterization by TLC, UV-VIS, IR and NMR of bixin from Bixa orellana L. (urucum) seeds. Based on the results, the extraction with NaOH 5% is the fastest, uses low cost materials, requires two to four laboratory hours and is a useful alternative for an experimental Organic Chemistry discipline. (author)

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2015-07-01

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

  19. Study of film graphene/graphene oxide obtained by partial reduction chemical of oxide graphite; Estudo de filme de grafeno/oxido de grafeno obtido por reducao quimica parcial do oxido de grafite

    Energy Technology Data Exchange (ETDEWEB)

    Gascho, J.L.S.; Costa, S.F.; Hoepfner, J.C.; Pezzin, S.H., E-mail: juliagascho@hotmail.com [Universidade do Estado de Santa Catarina (UDESC), Joinville, SC (Brazil). Programa de Pos-Graduacao em Ciencia e Engenharia de Materiais

    2014-07-01

    This study investigated the morphology of graphene/graphene oxide film obtained by partial chemical reduction of graphite oxide (OG) as well as its resistance to solvents. Films of graphene/graphene oxide are great candidates for replacement of indium oxide doped with tin (ITO) in photoelectric devices. The OG was obtained from natural graphite, by Hummer's method modified, and its reduction is made by using sodium borohydride. Infrared spectroscopy analysis of Fourier transform (FTIR), Xray diffraction (XRD) and scanning electron microscopy, high-resolution (SEM/FEG) for the characterization of graphene/graphene oxide film obtained were performed. This film proved to be resilient, not dispersing in any of the various tested solvents (such as ethanol, acetone and THF), even under tip sonication, this resistance being an important property for the applications. Furthermore, the film had a morphology similar to that obtained by other preparation methods.(author)

  20. Chemical and physical analysis on hard tissues after irradiation with short pulse Nd:YAG laser; Alteracoes quimicas e fisicas de tecidos duros irradiados por laser de neodimio chaveado

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Andrea Antunes

    2003-07-01

    This work reports on a study that was designed to investigate chemical, physical and morphological alterations in the dental enamel surface. The influence of application of laser in enamel surface by microscopic technical, X-ray fluorescence for chemical analysis, physical property as well as hardness and thermal analysis with Nd:YAG laser is also pointed out. A prototype of Nd:YAG (Q-switched) laser developed at the Center of Lasers and Applications - Institute of Energetic and Nuclear Research, aiming applications in the Medical Sciences that typical wavelength of 1.064 nm was used. The modifications in human dental enamel chemical composition for major and trace elements are here outlined. The accuracy of procedures was performed by analysis of natural hydroxyapatite as standard reference material. The identification and quantification of the chemical elements presented in the dental tissue samples were performed trough EDS, XRF and INAA. We determined the rate Calcium/Phosphorus (Ca/P) for different techniques. We performed an analysis in different regions of the surface and for different areas allowing a description of the chemical change in the total area of the specimen and the assessment of the compositional homogeneity of the each specimen. A comparison between XRF and INAA is presented. Based on morphological analysis of the irradiated surfaces with short pulse Nd:YAG laser we determined the area surrounded by the irradiation for the parameters for this thesis, and this technique allowed us to visualize the regions of fusion and re-solidification. The energy densities ranged from 10 J/cm{sup 2} to 40 J/cm{sup 2}, with pulse width of 6, 10 e 200 ns, and repetition rates of 5 and 7 Hz. In this thesis, FTIR-spectroscopy is used to analyze powder of mineralized tissue as well as enamel, dentine, root and cementum for human and bovine teeth after irradiation with short-pulse Nd:YAG laser. Characteristic spectra were obtained for the proteins components and mineral compound of dental tissue. We determined the rate between the area of the control and irradiated bands and the results pointed out an enlargement in the area below the curve of the distinct conditions of irradiation. We monitored the raise of temperature caused by irradiation using the T-thermocouple fixed on the pulpar chamber. The result obtained for the highest value of the energy density was inferior to 5 deg C, which indicates that its use is viable without damage on the dental pulp. Based on models already presented in the literature for the heat transfer we performed numeric simulations using the irradiation parameters from this thesis and we simulated the temperature variation in deepness and for different exposition time on the enamel and the dentine. (author)

  1. Evolution of {sup 222} Rn and chemical species related with eruptive processes of the Popocatepetl volcano; Evolucion de {sup 222} Rn y especies quimicas relacionadas con procesos eruptivos del volcan Popocatepetl

    Energy Technology Data Exchange (ETDEWEB)

    Aranda Z, P

    1998-10-01

    The study of the water quality for human consumption has always been great importance, considering the factors that can affect water quality as aquifers recharge and underground permeability. In this work, the behavior of three water springs related with the Popocatepetl volcano were studied within April 1997 and March 1998. The spring in Paso de Cortes in the municipality of Amecameca, State of Mexico, and the springs of Atlimeyaya and Axocopan in Atlixco, State of Puebla; the water of these last two springs is used for human consumption. The content of radon in water was determined by means of liquid scintillation, and a concentration of 1.22 Bq/l was found in the spring of Atlimeyaya, which represents 2 % of the maximum permissible level established by ICRP. A significant increase was observed in the Paso de Cortes spring in the month of July 1997. The content of radium, was determined by means of gamma spectrophotometry and small quantities of this element (<0.11 Bq/l) were found. Water chemical analysis also included usual physical-chemical parameters determination by means of conventional methods. The spring of Axocopan, was found to have the major level of minerals, followed by Atlimeyaya and finally the Paso de Cortes spring, which is supplied by recent infiltrated water. Fluoride level showed a peak high level in concentration during the months of October and November, time in which infiltration due to rain is low; concentration level found was above the maximum permissible level established by Mexican authorities for this compound. The other chemical species determined were: Ca{sup 2+} , Mg{sup 2+} , K{sup +}, Na{sup +}, H C O{sub 3} {sup -} , Cl{sup -} , S O{sub 4} {sup -} {sup 2} , Li, B, Sc, Ti, V, Rb, Sr and Ba, primarily, which did not show any significant variation with the change of seasons. No important variations in the concentration of radon, radium or for other volcanic activity related species were found in the entire study. (Author)

  2. The use of glycerol in PET chemical recycling with the prospect of the polymeric membranes production; Utilizacao de glicerol na reciclagem quimica de PET visando a producao de membranas polimericas cationicas

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Agne R. de; Consentino, Vinicius M.; Muniz, Aline S.; Sakae, George H.; Oliveira, Angelo R.S.; Cesar-Oliveira, Maria Aparecida F. [Universidade Federal do Parana - UFPR, Centro Politecnico, Curitiba, PR (Brazil)], e-mail: mafco@ufpr.br

    2011-07-01

    The recent interest in alternative sources of renewable energy of unlimited duration and with a low environmental impact, has led to a rise in the use and production of biodiesel. This requires an increase in the availability of glycerine in the market. This involves a study of new applications to increase the consumption of this raw material which can be linked to solving a serious environmental problem - the unsuitable disposal of post-consumption PET packages. Parallel to this, combustible cell technology is proving to have promising results, particularly in the area which uses polymeric electrolytes. The polymeric proton exchange membrane is currently most widely used in Nafion. However, this entails very high costs. By bringing together these important requirements in the energy sector, this study demonstrates how the development of aromatic sulfonate polyesters obtained from the chemical recycling of poly(ethylene terephthalate) with an aromatic derivative of glycerol. (author)

  3. Evaluation of the physico-chemical properties of nanocomposites of low density linear polyethylene and organophilic montmorillonite obtained by fusion; Avaliacao das propriedades fisico-quimicas de nanocompositos de polietileno linear de baixa densidade e montmorilonita organofilica obtidos por fusao

    Energy Technology Data Exchange (ETDEWEB)

    Arndt, Aline; Sandrin, Bianca M.; Pezzin, A.P.T., E-mail: anapezzin@yahoo.com.br [Universidade da Regiao de Joinville (UNIVILLE), SC (Brazil); Meier, Marcia M. [Universidade do Estado de Santa Catarina (UESC), Joinville, SC (Brazil). Departamento de Quimica; Balzer, Palova S. [Centro Universitario Unisociesc, Joinville, SC (Brazil). Departamento de Engenharia Mecanica; Tavares, Maria I.B. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil). Laboratorio de Solucoes em Ralaxometria

    2016-07-01

    In this project they were produced and characterized nanocomposite organoclay applied to linear low density polyethylene in order to improve their physicochemical properties. Samples were produced by means of extrusion and injection process, varying proportions of nanoclay (2; 2.5; 3.0 and 3.5%) in LLDPE. Samples nanocomposites were characterized by TGA, DSC and Flammability test (UL-94). The TGA analysis showed that adding nanoclay increased thermal stability, especially for LLDPE / OMMT2,0 sample increased thermal stability at 4.4%. By DSC it was found that samples with nanoclay incorporation did not affect the Tm of LLDPE, though the increase of nanoclay raised the degree of crystallinity of the samples 52.7% in LLDPE / 2.5 OMMT sample. The flammability results show that the sample LLDPE / OMMT 2.0 showed a decrease of 37.77% in the flame propagation velocity. The NMR showed that the samples up LLDPE / 2.5 OM has an exfoliated nanocomposite formation. (author)

  4. Isolation and partial chemical analysis of exopolysaccharides from cultivated marine diatom Coscinodiscus wailesii (Coscinodiscales, Bacillariophyta); Isolamento e analise quimica parcial de exopolissacarideos da diatomacea marinha cultivada Coscinodiscus wailesii (Coscinodiscales, Bacillariophyta)

    Energy Technology Data Exchange (ETDEWEB)

    Marson-Ascencio, Poliana G.; Ascencio, Sergio Donizeti [Universidade Federal do Tocantins, Palmas, TO (Brazil); Baggio, Selma Faria Zawadzki, E-mail: polianamarson@uft.edu.br [Universidade Federal do Parana, Curitiba, PR (Brazil). Centro Politecnico. Dept. de Bioquimica e Biologia Molecular

    2012-07-01

    The marine diatom Coscinodiscus wailesii has attracted ecological interest because their blooms affect fishing areas. The aim of this work was the isolation, extraction and partial chemical characterization of soluble exopolysaccharide and bound exopolysaccharide from C. wailesii. Cultures were grown in Guillards f/2 medium under controlled conditions of temperature, aeration, photo period and light intensity. Percentage of carbohydrate, uronic acids, sulfates groups and cellular lipids was determined. Ion exchange chromatography of exopolysaccharides produced three fractions whose partial chemical structures were disclosed using {sup 13}C NMR and methylation techniques. (author)

  5. Synthesis of liquid crystals derived from nitroazobenzene: a proposed multistep synthesis applied to organic chemistry laboratory classes; Sintese de cristais liquidos derivados do nitroazobenzeno: uma proposta de sintese multi-etapas aplicada as aulas de quimica organica experimental

    Energy Technology Data Exchange (ETDEWEB)

    Cristiano, Rodrigo; Cabral, Marilia Gabriela B.; Aquino, Rafael B. de; Cristiano, Claudia M.Z., E-mail: rcristiano@quimica.ufpb.br [Universidade Federal da Paraiba (UFPB), Joao Pessoa, PB (Brazil). Departamento de Quimica

    2014-07-01

    We describe a synthetic route consisting of five steps from aniline to obtain liquid crystal compounds derived from nitroazobenzene. Syntheses were performed during the second half of the semester in organic chemistry laboratory classes. Students characterized the liquid crystal phase by the standard melting point techniques, differential scanning calorimetry and polarized optical microscopy. These experiments allow undergraduate students to explore fundamentally important reactions in Organic Chemistry, as well as modern concepts in Chemistry such as self-assembly and self-organization, nanostructured materials and molecular electronics. (author)

  6. Analysis of the physico-chemical quality Enalapril and Simvastatin drugs manipulated in magistral pharmacies from Belo Horizonte, MG, Brazil; Analise da qualidade fisico-quimica dos medicamentos Enalapril e Sinvastatina manipulados em farmacias magistrais de Belo Horizonte, MG, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Tatiana Cristina Bomfim

    2013-07-01

    The increasing expansion of compounding pharmacy associated with several reports on variances in the quality of compounded drugs demonstrates the need for verification of quality, safety and efficacy of these products. In this work, physical and chemical analyzes were performed to evaluate the quality of some capsules manipulated enalapril and simvastatin, acquired in five pharmacies in Belo Horizonte /Brazil. Among the analyzes are pharmacopoeial tests for appearance, identification, determination of weight, content, related compounds and uniformity of dosage units, and was also performed neutron activation analysis for the determination of inorganic impurities in drugs sampled. The results showed that 60% of the samples were unsatisfactory for pharmacopoeial tests. The contents of the capsules sampled for individual testing unit dose uniformity between 0% and 136.2%. This test is important in evaluating the quality, which influences the safety and efficacy of drug treatment, since it allows you to check if the product contains the proper dosage and necessary for successful pharmacotherapy. On the other hand, underdosing can lead to reduced or absent desired therapeutic response, and overdoses can provide an undesirable effects and even toxic. The concentration of inorganic impurities was considered to be relatively small. However, no specific limits for some chemical elements in medicine hamper a better thread. In addition, further studies must be performed to assess chronic exposure to low concentrations of inorganic impurities, since drugs can be continuously used, and other sources of exposure must also be considered in order to evaluate the risk. The problems related to the quality and safety of compounded drugs are still reality in the country and reveal a serious public health problem, especially regarding the lack of uniformity between the unit doses of medications. It is suggested that the competent authorities to sanitary products, propose changes in supervision and improvements in legislation, since the analysis required by the law, are not sufficient to ensure the quality of drugs dispensed in pharmacies. (author)

  7. Evaluation of the effects of gamma radiation on physicochemical characteristics of kiwi (Actinidia deliciosa) cv. Hayward minimally processed; Avaliacao dos efeitos da radiacao gama nas caracteristicas fisico-quimicas de kiwi (Actinidia deliciosa) cv. Hayward minimamente processado

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Ana Claudia Sampaio

    2011-07-01

    The search for a healthy life has led consumers to rethink their eating habits, consuming fruits and vegetables in place of manufactured products, therefore, the demand for minimally processed products has evolved rapidly. The kiwi fruit (Actinidia deliciosa) has high nutritional value, being rich in C vitamin especially, which has wide acceptance in consumer markets. Thus, along with papaya, passion fruit and pineapple, kiwi can be considered as an additional feature of C vitamin in the diet, or as a substitute for traditional citrus. The aim of this study was to assess the effects of gamma radiation on physical and chemical characteristics of kiwis minimally processed and stored under refrigeration, since this technology increases the shelf life of fruits and vegetables. The Kiwis was stripped, processed and cut into slices, stored in polyethylene bags of 10 cm squared and irradiated at doses of 0 (control), 1 and 2 kGy. A source of {sup 60}Co Gammacell 220, dose rate of 0.429 kGy/hour, in which each treatment had 5 replicates with 15 slices of kiwifruit per replicate. After irradiation the samples were stored in a climatic chamber at 6 degree C (near the temperature of commercial refrigerators). The following criteria were physical chemical analysis: pH, color, chlorophyll content, loss of weight, moisture, acidity and Brix. The analysis were done on 1{sup st}, 7{sup th} and 14{sup th} days after irradiation. The results indicated that gamma radiation did not induce deleterious changes in the physicochemical properties of the kiwi may be used for preservation of minimally processed kiwifruit. (author)

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2011-07-01

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

  9. Propagation of crevices in stainless steel AISI304L in conditions of hydrogen chemistry (HWC); Propagacion de grietas en acero inoxidable AISI304L en condiciones de quimica de hidrogeno (HWC)

    Energy Technology Data Exchange (ETDEWEB)

    Diaz S, A.; Fuentes C, P.; Merino C, F. [ININ, 52750 Ocoyoacac, Estado de Mexico (Mexico); Castano M, V. [IFA-UNAM, Juriquilla, Queretaro (Mexico)]. e-mail: ads@nuclear.inin.mx

    2006-07-01

    Crevice growth velocities in samples of AISI 304L stainless steel thermally welded and sensitized were obtained by the Rising displacement method or of growing displacement. It was used a recirculation circuit in where the operation conditions of a BWR type reactor were simulated (temperature of 288 C and a pressure of 8 MPa) with the chemistry modified by the addition of hydrogen with and without the addition of impurities of a powerful oxidizer like the Cu{sup ++} ion. CT pre cracked specimens were used and each rehearsal stayed to one constant displacement velocity of 1 x 10{sup -9} m/s (3.6 {mu}m/hr), making a continuous pursuit of the advance of the crack by the electric potential drop technique. To the end of the rehearsal it was carried out the fractographic analysis of the propagation surfaces. The values of the growth velocities obtained by this methodology went similar to the opposing ones under normal conditions of operation; while the fractographic analysis show the cracks propagation in trans and intergranular ways, evidencing the complexity of the regulator mechanisms of the one IGSCC even under controlled ambient conditions or with mitigation methodologies like the alternative hydrogen chemistry. (Author)

  10. Chemical characterization of xyloglucan obtained from Tamarindus indica seeds from the semi arid northeastern; Caracterizacao quimica de xiloglucana obtida a partir de sementes de Tamarindus indica oriundas do semi arido nordestino

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Delane da C.; Cunha, Arcelina P.; Silva, Sarah M.F.; Gallao, Maria Izabel, E-mail: izagalao@gmail.com [Rede Nordeste de Biotecnologia (RENORBIO), Fortaleza, CE (Brazil). Centro de Ciencia; Azeredo, Henriette M.C. de [EMBRAPA Agroindustria Tropical, Fortaleza, CE (Brazil)

    2013-07-01

    Playing an important role in food, seeds are sources of carbohydrates, proteins and lipids, so they have been explored for a long time by the food industry. For this reason, the objective of present work is to obtain and characterize xyloglucan obtained from tamarind seeds (Tamarindus indica). In order to assess possible industrial applications of the polysaccharide, it was characterized by Infrared Fourier Transform spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR) and Thermogravimetric Analysis (TGA). Search results showed that it was possible to perform xyloglucan extraction but the process still requires improvements in order to increase the extraction yield. FTIR, NMR and TGA results were similar to those found in literature. (author)

  11. Chemical characterization of xyloglucan obtained from Tamarindus indica seeds from the semi arid northeastern (Brazil); Caracterizacao quimica de xiloglucana obtida a partir de sementes de tamarindus indica oriundas do semi arido nordestino

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Delane da C.; Cunha, Arcelina P.; Silva, Sarah M.F.; Gallao, Maria Izabel, E-mail: izagalao@gmail.com [Rede Nordeste de Biotecnologia (RENORBIO), Forteleza, CE (Brazil). Centro de Ciencia; Universidade Federal do Ceara (UFC), Fortalea, CE (Brazil); Azeredo, Henriette M.C. de [EMBRAPA Agroindustria Tropical, Fortaleza, CE (Brazil)

    2015-07-01

    Playing an important role in food, seeds are sources of carbohydrates, proteins and lipids, so they have been explored for a long time by the food industry. For this reason, the objective of present work is to obtain and characterize xyloglucan obtained from tamarind seeds (Tamarindus indica). In order to assess possible industrial applications of the polysaccharide, it was characterized by Infrared Fourier Transform spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR) and Thermogravimetric Analysis (TGA). Search results showed that it was possible to perform xyloglucan extraction but the process still requires improvements in order to increase the extraction yield. FTIR, NMR and TGA results were similar to those found in literature. (author)

  12. Physico-chemical quality of drinking water in the northwest area of Madrid (Spain); Calidad fisico-quimica de las aguas de abastecimiento de la zona noroeste de Madrid

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Mata, M.; Orzaez Villanueva, M. T.; Tenorio Sanz, M. D.; Garcia Puertas, P. [Universidad Complutense de Madrid (Spain); Montes Boltella, C. [Universidad Carlos III. Leganes Madrid (Spain)

    2001-07-01

    A physico-chemical analytical study of the edible waters of the northwest area of Madrid has been made. The object was to evaluate the quality characters of this water thought the water analysis of 40 representative buildings. The parameters analyzed were odour, taste, turbidity, pH, conductivity, nitrate, nitrite, ammonia, oxid ability and chlorine. The results show the analyzed waters agree with the current public consume waters legislation through with some punctual exceptions. (Author) 13 refs.

  13. Caracteristicas fisico-quimicas e microbiológicas de ovos de codorna conservados na forma de picles
    Physico-chemical and microbiology of quail eggs preserved in the form of pickles

    Directory of Open Access Journals (Sweden)

    P. B. FARIA

    2010-12-01

    Full Text Available

    Visando aumentar o tempo de conservação, com salga e acidificação do ovo de codorna cozido na forma de picles, foram testados sete tipos de soluções: A (60% vinagre, 8% NaCl; B (40% vinagre, 8% NaCl; C (20% vinagre, 0,3% ácido cítrico, 8% NaCl; D (20% vinagre, 0,3% ácido cítrico, 5% NaCl; E (2% ácido acético, 0,3% ácido cítrico, 5% NaCl,; F (2% ácido acético, 0,3% ácido cítrico, 5% NaCl, 0,02% benzoato de sódio e G (0,4% ácido acético, 0,3% ácido cítrico, 5% NaCl. Foram realizados análises de pH, acidez titulável, cloretos totais e perda de peso dos ovos, nos intervalos de 2, 7, 14, 21, 28 dias. Todos os resultados foram infl uenciados significativamente a partir do segundo dia do início do experimento. Para acidez titulável as soluções A, E e F mostraram maior acidez (p<0,05. No produto, o pH inicial foi reduzido a partir do segundo dia e somente a solução G apresentou valores de pH acima de 4,5. Para cloretos totais, as soluções A, B e C mostraram maior percentual (p<0,01 do que os demais. As conservas promoveram mudanças significativas a partir do segundo dia, as soluções com maiores porcentagens de acidez e menor valores de pH proporcionaram melhor estabilidade e menor desenvolvimento de microrganismos mesófilos. As soluções D, E e F apresentaram em geral melhores características físico-químicas e microbiológicas para conservação de ovos de codorna na forma de picles.

  14. Response function of an HPGe detector simulated through MCNP 4A varying the density and chemical composition of the matrix; Funcion respuesta de un detector HPGe simulada mediante MCNP 4A variando la densidad y composicion quimica de la matriz

    Energy Technology Data Exchange (ETDEWEB)

    Leal A, B.; Mireles G, F.; Quirino T, L.; Pinedo, J.L. [Universidad Autonoma de Zacatecas, Zacatecas (Mexico)]. e-mail: bleal79@yahoo.com.mx

    2005-07-01

    In the area of the Radiological Safety it is required of a calibrated detection system in energy and efficiency for the determination of the concentration in activity in samples that vary in chemical composition and by this in density. The area of Nuclear Engineering requires to find the grade of isotopic enrichment of the uranium of the Sub-critic Nuclear Chicago 9000 Mark. Given the experimental importance that has the determination from the curves of efficiency to the effects of establishing the quantitative results, is appealed to the simulation of the response function of the detector used in the Regional Center of Nuclear Studies inside the range of energy of 80 keV to 1400 keV varying the density of the matrix and the chemical composition by means of the application of the Monte Carlo code MCNP-4A. The obtained results in the simulation of the response function of the detector show a grade of acceptance in the range from 500 to 1400 keV energy, with a smaller percentage discrepancy to 10%, in the range of low energy that its go from 59 to 400 keV, the percentage discrepancy varies from 17% until 30%, which is manifested in the opposing isotopic relationship for 5 fuel rods of the Sub critic nuclear assemble. (Author)

  15. Effect of adding of the styrene-butadiene-styrene (SBS) copolymer in chemical and rheological properties of the brazilian asphalt; Efeito da adicao de SBS nas propriedades quimicas e reologicas de asfalto oriundo de petroleo brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Lucena, M.C.C.; Soares, S.A. [Ceara Univ., Fortaleza, CE (Brazil). Dept. de Quimica Organica e Inorganica]. E-mail: mccl@dqoi.ufc.br; sas@ufc.br; Soares, J.B. [Ceara Univ., Fortaleza, CE (Brazil). Dept. de Engenharia de Transportes]. E-mail: jsoares@det.ufc.br

    2003-07-01

    Chemical and rheological characterization of the asphalt cement (AC) from the Fazenda Alegre petroleum, and the effect of adding 4.5% of the styrene-butadiene-styrene (SBS) copolymer were investigated. Structural characteristics were analyzed by infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). A structure similar to the Arabian and Venezuelan petroleum was observed. The simulated aging led to structural modification noticed by the increment in the carbonyl and sulphoxide groups. Thermogravimetry (TGA) showed that SBS did not affect the AC thermal decomposition at both inert and oxidative atmosphere. However, the differential scanning calorimetry (DSC) showed a decrease in the glass transition temperature of the material when SBS was added. The effect of SBS on the absolute viscosity revealed that SBS is not an inert additive and causes an increase in viscosity, in a nonlinear fashion. The commonly found Newtonian behavior of asphalt binders under high temperatures was also found on the SBS modified binder. Dynamic mechanical tests have shown that SBS increases the binder performance grade. (author)

  16. 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)

  17. Evaluation of occupational exposure to chemicals in research and development laboratories in the petrochemical industry; Avaliacao da exposicao ocupacional a substancias quimicas em laboratorios de pesquisa e desenvolvimento na area petroquimica

    Energy Technology Data Exchange (ETDEWEB)

    Rebelo, Paulo Antonio de Paiva [Seguranca, Meio Ambiente, Eficiencia Energetica e Saude (SMES). Gerencia de Saude (Brazil)], e-mail: prebelo@petrobras.com.br; Coeli, Medina [Unidade de Negocio de Exploracao e Producao do Rio de Janeiro (UN-RIO). Gerencia de Seguranca(Brazil)], e-mail: leo.medina@petrobras.com.br; Rosa, Henrique Vicente Della; Nascimento, Elizabeth de Souza [Universidade de Sao Paulo (USP). Faculdade de Ciencias Farmaceuticas (Brazil)], e-mails: hdellarosa@toxikon.com, esnasci@usp.br

    2009-04-15

    A sectional study was conducted on workers in 137 laboratories, 30 pilot units and support areas of a research center in order to evaluate the level of occupational exposure based on environmental measurements from the 2004's workplace environmental protection program with the aim of assessing the risk of health injury arising from occupational exposure to chemical agents. The recognition task was developed using interviews and secondary data from safety programs covering health and environmental risks of all procedures, facilities / equipment and activities. 2,738 cases of exposure were identified, involving exposure to 484 chemicals (with 246 agents and 238 chemicals mixtures), ranging in purity and concentration, found in 243 jobs. The target population comprised 1,563 workers exposed to chemical agents, subdivided into 168 different Homogeneous Group of Expose with an average of 4.55 employees per group. In each workplace were identified, on average, 4.91 HGE and, on average, 3.73 chemicals. Regarding the 2,738 cases of chemical agents versus activity, in 14% of the cases (382 cases) there was daily exposure, in 82.1% (2,249 cases) the frequency of use varied from two to three times a week and in the remaining 3.9% (107 cases) the use was sporadic, about once a week or less. Nine of the ten most frequently used substances were hydrocarbons. 977 samples (485 samples of chemicals and 492 samples of benzene) were measured. Out of the total number of measurements taken, 91.9% of the evaluations corresponding to 92.5% of workers who work with chemicals, presented environmental measurement results below the action level, demonstrating, therefore, exposure to low concentrations.Chemical were found in most areas of work and accounts for 81% of occupational exposure in the evaluated laboratories. There is evidence of presence of one given substance in various locations, as well as of a great diversity of frequently used chemicals, since in every workplace 3.73 chemicals on average were identified, ranging from 1 to 12 and 96.1% of cases. Exposure to a given substance occurs at least every three days; in 14% of cases it happens on a daily basis, involving 71.5% of chemicals. In the study group, 59% of workers remain in business for over ten years, undergoing exposure for a long time (chronic). (author)

  18. Recent trends in the mitigation of the IGSCC through modifications in the water chemistry of BWR reactors; Tendencias recientes en la mitigacion del IGSCC mediante modificaciones en la quimica del agua de reactores BWR

    Energy Technology Data Exchange (ETDEWEB)

    Diaz S, A.; Robles, E.F. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2003-07-01

    During the last years, the Nuclear Power stations had been that to adequate or to modify the parameters and operational conditions, attempting to maintain and to safeguard the integrity and functionality of its components and systems, as well as the personnel safety involved in its operation. In a Boiling water reactor (BWR), the chemical control of the water, constitutes one of the fundamental aspects to get a sure and reliable operation, having as main objectives: (a) The protection of the reactor vessel, of the structural materials of the same one and of the pipes and components of those recirculation systems against the Intergranular stress corrosion phenomena (IGSCC); (b) To guarantee the integrity of the nuclear fuel minimizing the corrosion phenomena in the fuel elements; and (c) The reduction of the operational dose of the personnel involved directly in the operation and maintenance by means of the control of the activated corrosion products. (Author)

  19. Características físico-quimicas, análise sensorial e conservação de frutos de cultivares de bananeira resistentes à sigatoca-negra

    Directory of Open Access Journals (Sweden)

    Célia Lúcia Siqueira

    2010-10-01

    Full Text Available O cultivar Prata Anã é o mais plantada no Norte de Minas Gerais, o que demonstra estar a bananicultura regional baseada numa variedade suscetível à sigatoca-negra. Apesar de existirem cultivares resistentes em fase de recomendação para o cultivo na região, ainda são escassos os trabalhos relacionados a metodologias de conservação pós-colheita. Assim, o objetivo deste trabalho foi avaliar o período de armazenamento e as características físico-químicas e sensoriais dos cultivares de bananeira Fhia - 02 e Precioso, ambos resistentes à sigatoca-negra, e o efeito da atmosfera modificada associada à refrigeração. Foram realizados três experimentos, o primeiro em temperatura ambiente, o segundo a 12 ºC e o terceiro a 15 ºC. Esses experimentos foram instalados no delineamento em blocos casualizados em esquema de parcelas subdivididas no tempo, tendo nas parcelas um fatorial 2 (com e sem embalagem x 2 (Fhia - 02 e Precioso e nas subparcelas as avaliações em intervalo de seis e dois dias para frutos armazenados nas temperaturas de 12, 15 e 25 ºC, com quatro repetições e três frutos por unidade experimental. Após o tratamento, os frutos foram dispostos em bandejas de poliestireno expandido (sem embalagem e embalagens de 10 e 16 µm e umidade relativa de 90%. As características avaliadas foram: tamanho, diâmetro, cor, firmeza, perda de matéria fresca, sólidos solúveis totais (SST, acidez total titulável (ATT, SST/ATT, pH e análise sensorial. O uso da embalagem associada à refrigeração permitiu armazenar os frutos por 28 dias, mantendo as características físico-químicas.

  20. Influence of the chemical composition, heat and surface treatment in the biofouling of austenitic stainless steels; Influencia de la composicion quimica, del tratamiento termico y del acabado supreficial en el bioensuciamiento de aceros inoxidables austeniticos

    Energy Technology Data Exchange (ETDEWEB)

    Sarro, M. I.; Aleman, O.; Moreno, D. A.; Roso, M.; Ranninger, C.

    2004-07-01

    The main objective of this study was to analyse the biofouling processes in the kinds of stainless steels used normally in industry (UNS S30400, UNS S30403 and UNS S31600), with different surface treatments after grinding and polishing. The study was developed using two microscopy techniques. Scanning Electron Microscopy (SEM) was used to evaluate the microorganisms distribution in the materials, and Epi fluorescence Microscopy was used to evaluate the viability of cells in the biofilm. The results revealed the influence of the material, heat treatment, surface treatment and roughness in the biofouling processes in the stainless steel assays. (Author) 33 refs.

  1. Synthesis of poly(D,L-lactide-co-glycolide) copolymers and its chemical characterization by NMR and FTIR; Sintese e caracterizacao quimica por RMN e FTIR do copolimero poli(D,L-lactideo-co-glicolideo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    Poly(D,L-lactide-co-glycolide) copolymer is of great interest for medical applications. This interest is justified by the fact that it is bioreabsorbable, biocompatible and non-toxic, while its degradation kinetics can be modified by the copolymerization ratio of the monomers. In this study, copolymers were synthesized at 175 deg C by opening the rings of the cyclic dimers of the D,L-lactide and glycolide monomers in the presence of stannous octoate initiator and lauryl alcohol co-initiator. The efficient application of a vacuum to the reaction medium, coupled with adequate stirring, is fundamental for the success of the synthesis. The following analysis techniques were used to characterize the synthesized copolymers: Nuclear Magnetic Resonance Spectroscopy (NMR) and Fourier Transform Infrared Spectroscopy (FTIR). The chemical composition and the ratio of the monomers in the synthesized copolymer were determined. (author)

  2. Applications of artificial intelligence techniques to organic chemistry. Study on sup 13 C NMR of steroids using computer. Aplicacoes de tecnicas de inteligencia artificial em quimica organica. Estudo, por computador, de RMN sup 13 C de esteroides

    Energy Technology Data Exchange (ETDEWEB)

    Lins, A P [Instituto Biologico, Sao Paulo, SP (Brazil). Secao de Farmacologia; Furlan, M [UNESP, Araraquara, SP (Brazil). Inst. de Quimica; Gastmans, G P [UNESP, Guaratingueta, SP (Brazil). Inst. de Quimica e Fisica; Emerenciano, V P [Sao Paulo Univ., SP (Brazil). Inst. de Quimica

    1991-01-01

    This work describes the utilization of two groups of programs in searching for characteristic signals of NMR {sup 13}C steroidal compounds. The first group of programs used data bases with the spectral data and a methodology that enables the choice and the search of substructures. The chemical shifts and multiplicities for each specific substructure are used as rules to identify different types and subtypes of steroidal compounds. The second one was built to apply the rules formulated by the first group of programs and to foresee any skeletal based on a spectral analysis. (author).

  3. Chemical structures and thermal properties of polyesters obtained from different samples of bio diesel epoxidized; Estruturas quimicas e propriedades termicas de poliesteres obtidos a partir de diferentes tipos de biodiesel epoxidado

    Energy Technology Data Exchange (ETDEWEB)

    Samios, Dimitrios; Reiznautt, Quelen B.; Nicolau, Aline; Martini, Denise D.; Chagas, Arthur L. das, E-mail: dsamios@iq.ufrgs.b [Universidade Federal do Rio Grande do Sul (IQ/UFRGS), Porto Alegre, RS (Brazil). Inst. de Quimica. Lab. de Instrumentacao e Dinamica Molecular

    2009-07-01

    In this work new structures from oligo esters and polyesters from different oils (olive oil, sunflower oil and linseed oil) were synthesized and characterized. Oligo esters and polyesters were synthesized from the reaction of fatty acid methyl epoxy-esters, obtained from different oils, with cis-1,2-cyclohexanedicarboxylic anhydride in the presence of triethylamine (TEA). Different amounts of the resin 1,4-butanediol diglycidyl ether (BDGE) were added in order to increase the capacity of crosslinking. The molar ratio of BDGE used in system was between 0 and 0.066. The intermediate structures, as well as the oligo esters and polyesters produced, were analyzed by using Fourier Transform Infrared Spectroscopy and Nuclear Magnetic Resonance ({sup 1}H - NMR). The thermal behavior of the products was realized through differential scanning calorimetry and Thermogravimetric analyses. The presence of BDGE in the materials chains increases the bonding capacity resulting in a higher molecular weight material which presents good thermal stability. (author)

  4. Physical, chemical and mineralogical characterization of water treatment plant waste for use in soil-cement brick; Caracterizacao fisica, quimica e mineralogica de residuo de estacao de tratamento de aguas para aproveitamento em tijolo solo-cimento

    Energy Technology Data Exchange (ETDEWEB)

    Pessin, L.R.; Destefani, A.Z.; Holanda, J.N.F., E-mail: larapessin@hotmail.com [Universidade Estadual do Norte Fluminense Darcy Ribeiro (CCT/PPGECM/UENF), Campos dos Goytacazes, RJ (Brazil)

    2011-07-01

    The water treatment plants (WTP) for human consumption generate huge amounts of waste in the form of sludge (sludge) that have been over the years mostly inadequately prepared in water resources and the environment. Moreover, traditional methods of disposal of waste water treatment plants commonly used are generally costly activities. An alternative method for disposal of this waste abundant is its incorporation in ceramic products. This work is focused on the physical-chemical and mineralogical composition of a sample of waste water treatment plants from the region of Campos dos Goytacazes-RJ to their use in the manufacture of soil-cement brick. Several characterization techniques were used including X-ray diffraction, X-ray fluorescence, scanning electron microscopy, picnometry, particle size analysis and plasticity. The experimental results indicate that the waste water treatment plants have the potential to be used in the manufacture of ecologic soil-cement bricks. (author)

  5. Chemical signature study of tupiguarani ceramic tradition from Central region of the Rio Grande do Sul state, Brazil; Estudo de assinaturas quimicas em ceramica da tradicao tupiguarani da regiao central do estado do Rio Grande do Sul, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Bona, Irene Akemy Tomiyoshi

    2006-07-01

    In this work a model based on experimental results using chemical composition data of the pottery sherds applied to Spearmann's no parametric test, principal component analysis and discriminant analysis, was applied. The samples are soils and Tupiguarani Tradition pottery sherd from the central area of the Rio Grande do Sul State. The chemical elements , Al, Ba, Ca, Cr, Fe, K Mn, Pb, Rb, S, Si, Sr, Ti, V and Zn were determined by energy dispersive X-ray fluorescence (EDXFR) while Ce, Cu, Gd, La, Nd, Pr, Sm, Th and Y by high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) techniques. Relationships among the pottery characteristics, studied sites and sherd dispersion in the several sites were proposed. Indications of chemical signature of the small pottery with function to go or not to the fire were observed. The largest dispersion is of small pottery with surface treatment no corrugated. The potteries chemical fingerprints from Ijui River, Ibicui-Vacacai Mirim River and Jacui River were verified. (author)

  6. Identification and analysis of the environmental management documentation related to the activities of environmental and chemical analysis laboratories; Identificacao e analise da documentacao pertinente a gestao ambiental relacionada as atividades de laboratorios de analises quimicas e ambientais

    Energy Technology Data Exchange (ETDEWEB)

    Otomo, Juliana Ikebe; Brandalise, Michele; Romano, Renato Lahos; Marques, Roberto; Szarota, Rosa Maria; Raduan, Rosane Napolitano; Salvetti, Tereza Cristina; Egute, Nayara dos Santos; Almeida, Josimar Ribeiro de; Aquino, Afonso Rodrigues de [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: araquino@ipen.br

    2009-08-15

    In the last years, many documents were elaborated by several countries and entities, concerning the environmental question. The implantation of and Environmental Management System requires specific documentation so that a company or laboratory can adjust themselves to the environmental quality. For laboratories of chemical, environmental analyses and also nuclear materials, the needs of attendance to the requirements of the following municipal, state and federal institutions were identified: Corpo de Bombeiros, CNEN - Comissao Nacional de Energia Nuclear, IBAMA - Instituto Brasileiro do Meio Ambiente e dos Recursos Renovaveis, ANVISA - Agencia Nacional de Vigilancia Sanitaria, PMSP - Prefeitura Municipal de Sao Paulo e a CETESB - Companhia Ambiental do Estado de Sao Paulo. (author)

  7. Quality in the chemical analysis of biological matrices by fluorescence X-ray by energy dispersive; Qualidade nas analises quimicas de matrizes biologicas pela fluorescencia de raios-X por dispersao de energia

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Evely E. de; Paiva, Jose Daniel S. de; Franca, Elvis J. de; Almeida, Macio E.S.; Cantinha, Rebeca S.; Hazin, Clovis A., E-mail: evelysousa_182@hotmail.com, E-mail: ejfranca@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2013-07-01

    The aim of this study was to obtain multielement analytical curves of high analytical rigor to the analysis of biological matrices by the technique of fluorescence x-ray energy dispersive - EDXRF. Calibration curves were constructed from the reference materials IAEA 140, IAEA 155, IAEA V8, V10 to the International Atomic Energy Agency - IAEA, and SRM1515, SRM 1547, SRM 1570a, SRM 1573a, SEM 1567a, to the National Institute of Standards and Technology - NIST. After energy calibration, all samples were subjected to vacuum to the analyzes by 100 seconds for each group of chemical elements. The voltages used were respectively 15 keV for chemical elements with less than atomic number 22 and 50 keV for the others. After the construction of the curves, the analytical quality was assessed by the analysis of a portion-test of the reference material SRM 2976, also produced by NIST. Based on the number of certified reference materials used for construction of calibration curves in this work, quality analytical protocol was originated with considerable reliability for quantification of chemical elements in biological samples by EDXR.

  8. Effect of the gamma radiation on the chemical, rheological, baker and microbiological properties in wheat flour; Efecto de la radiacion gama sobre las propiedades quimicas, reologicas, panaderas y microbiologicas en harina de trigo

    Energy Technology Data Exchange (ETDEWEB)

    Agundez A, Z; Fernandez R, M V [Departamento de Ciencias Quimico Biologicas, Universidad de Sonora, Hermosillo (Mexico); Arce C, M E; Cruz Z, E [Instituto de Ciencias Nucleares, UNAM, 04510 Mexico D.F. (Mexico); Chernov, V; Barboza F, M [Departamento de Investigacion en Fisica, Universidad de Sonora, Hermosillo (Mexico)

    2002-07-01

    The gamma radiation has been used in several places of the World as a sterilization method, preservation and pasteurization of foodstuffs, effect which is achieved due to diminishing or elimination of the microorganisms, reaching every time more acceptance, moreover eliminates the uses of toxic and carcinogenic substances, of general use, but at the present, being in the process of being totally prohibited, due to the higher risk in the human health. In this work the related results with the effects of the gamma radiation are presented, coming from a {sup 60} Co source, in commercial wheat flour exposed to a dose of 1.0 KGy. The used dose is that allowed according to the NOM-033-SSA1-1993 standard. It was determined that the chemical characteristics of humidity, protein and ashes were not affected by radiation. The rheological properties neither suffer severe effects as consequence of radiation; the pharynographic and alveographic parameters were lightly affected by the treatment. Significant changes were detected in the percentage of water absorption and in the tolerance index to mixing. However a diminish of 10% in the development time and an increase of 13% in the stability was observed, for the irradiated samples respect to the those samples not irradiated. In relation to the alveograph parameters it was only detected a diminish of 7% in the force parameter (w) without changes in the tenacity/blowing up index ratio (P/L). The fall number diminish 11% indicating a small diminution in viscosity. The bakering properties do not turn out modified by the irradiation treatment finding a specific weight of 4.6 and 4.5 (cm{sup 3}/g) for the control and irradiated samples, respectively. In the mesophyll analysis it was found a diminish of 96% from the original charge in control samples, observing a diminution of 74 and 25% in yeasts and mushrooms respectively. Microbiologically it was determined absence of total coliforms bacteria and faecal coliforms in the control samples and of course in those ones treated with gamma radiation. In general the results show that the use of gamma radiation in the recommended dose does not affect significantly the functional properties of the wheat flour, being moreover advantageous due to the diminution of the bacterial charge induced by the gamma radiation. Acknowledgments. Project sponsored by the UNAM, DGICSA-SEP and CONACYT. (Author)

  9. Study of clay chemical composition in formation of new phases in crystalline materials ceramic; Estudo da composicao quimica de argilas na formacao de novas fases cristalinas em materiais ceramicos

    Energy Technology Data Exchange (ETDEWEB)

    Lima, L.K.S.; Goncalves, W.P.; Silva, V.J.; Dias, G.; Neves, G.A.; Santana, L.N.L., E-mail: lizandralima15@gmail.com, E-mail: lisiane@dema.ufcg.edu.br [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia dos Materiais

    2016-07-01

    The knowledge of the characteristics of raw materials and the behavior of these during the heat treatment is crucial before starting any manufacturing process of clay-based products. The objective of this work was to study phase transformations of clay under different heat treatments using conventional oven. To achieve the same were used two clays coming from the municipality of Cubati - PB and kaolin from an industry in the Northeast. The samples were subjected to beneficiation process, crushing, grinding and sieving and further characterized: chemical analysis, particle size, thermal and mineralogical. For heat treatment temperatures employed were 1000, 1100 and 1200 ° C, heating rate 5 ° C / min and residence time of 60min. After this step, the mineralogical characterization was performed by x-ray diffraction technique. Clays with larger particle size fraction below 2um and greater amount of flux oxides showed higher amount of mullite for the temperatures studied. The results also showed nucleation of mullite phase from 1100 °C, a band 2theta in the range of between 20 and 25°, characteristic of amorphous silica and the temperature rise was observed intensification of crystalline phases. (author)

  10. Effect of endogenous factors on the chemical perception of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) to sex pheromone; Efeito de fatores endogenos na percepcao quimica de Grapholita molesta(Busck) (Lepidoptera: Tortricidae) ao feromonio sexual

    Energy Technology Data Exchange (ETDEWEB)

    Altafini, Deisi L.; Sant' Ana, Josue; Redaelli, Luiza R., E-mail: deisila@gmail.co [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Dept. de Fitossanidade. Programa de Pos-Graduacao em Fitotecnia

    2010-06-15

    The oriental fruit moth, Grapholita molesta (Busck), stands out as one of the most important pest in Rosaceae orchards in Brazil. During feeding, caterpillars bore into shoots, branches and fruits, impairing the commercial production. This work aimed to study the effect of endogenous factors in the chemical perception and in the species chemotactic behavior, seeking to optimize monitoring and the behavioral control of this pest. We evaluated male electroantennographical (EAG) and chemotactical (olfactometry) responses to the synthetic sex pheromone in different ages, virgins or mated and fed or unfed. The EAG responses of males did not differ for all evaluated factors. Nevertheless, the chemotactical behavior of males seems to decrease with age, not varying as a function of mating or feeding conditions. The knowledge about the interference of these factors in G. molesta may help with the interpretation of fi eld results, allowing the development of suitable and reliable control measures based on infochemicals for behavioral control. (author)

  11. Physicochemical characterization of sludge obtained in a UASB reactor: influence on the energetic utilization in the pyrolysis process; Caracterizacao fisico-quimica de lodo obtido em um reator UASB: influencia no aproveitamento energetico em processo de pirolise

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Murillo Barros de [Universidade Federal do Tocantins (UFT), Palmas, TO (Brazil)], Email: murillopur@yahoo.com.br; Vieira, Glaucia Eliza Gama; Cardoso, Aderlanio da Silva; Silveira, Dyego Amaral; Figueiredo, Radson Lima [Universidade Federal do Tocantins (LEDBIO/UFT), Palmas, TO (Brazil). Lab. de Ensaios e Desenvolvimento de Biomassas e Biocombustiveis

    2010-07-01

    In biological treatment processes of domestic sewer it leaves of the organic matter is converted and another is absorbed being part of the microbial biomass denominated generic of mud biological or secondary composed mainly of biological solids, and that for that reason can also be denominated of sewage sludge. To give a maintainable final destiny for that residue has been one of the great challenges of the sanitation in the last years. Great part of that material is destined unproductive some are incinerated, others are disposed in sanitary embankments. This work had as objective the physiochemical characterization of the digested sludge, virgin and free from oxide of calcium (CaO), produced in the reactor UASB, of ETE Vila Uniao located in the city of Palmas-TO, for the destination as raw material for energy use in pyrolysis process. The collected sample was taken drought and stabilized to be analyzed at the laboratory LEDBIO/UFT where they were studied the particle, tenor of ashes, humidity and volatile density and sequential extraction for soxhlet. Found in the biomass loud tenor of volatile (56,72%), carbon fastens low (5,21%) and a considerable tenor of ashes (32,78%), what suggests that that sludge, in agreement with the comparisons of the literature, can obtain good incomes in pyrolysis process, especially incomes in bio-oil and coal. (author)

  12. Chemical characterization of bottom ashes generated during combustion of a Colombian mineral coal in a thermal power plant; Caracterizacao quimica das cinzas de fundo originadas pela combustao, em usina termoeletrica, de um carvao mineral do nordeste da Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Pinheiro, H.S.; Nogueira, R.E.F.Q.; Lobo, C.J.S.; Nobre, A.I.S.; Sales, J.C.; Silva, C.J.M., E-mail: hspfisica@hotmail.com [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Centro de Tecnologia. Dept. de Engenharia Metalurgica e de Materiais

    2012-07-01

    Bottom ashes generated during combustion of a mineral coal from Colombia were characterized by X-ray fluorescence spectrometry and X-ray diffraction. The interest in this particular coal is due to the fact that it will be used by a thermal power plant in Ceara, Northeastern Brazil, where it could produce over 900 tons of different residues/combustion products every day. Results from Xray fluorescence allowed identification and quantification of elements present in the sample: silicon (59,17%), aluminum (13,17%), iron (10,74%), potassium (6,11%), titanium (2,91%), calcium (4,97%), sulphur (0,84%) and others (2,09%). The X-ray diffraction revealed patterns from silica, mullite, calcium sulphate and hydrated sodium. Results obtained so far indicate that the material is a potential raw-material for use in the formulation of ceramic components (author)

  13. Determination of concentration of radon, volatile organic compounds (VOC) and water chemistry in springs near to Popocatepetl volcano; Determinacion de la concentracion de radon, VOCs y Quimica del agua en manantiales cercanos al volcan Popocatepetl

    Energy Technology Data Exchange (ETDEWEB)

    Pena, P.; Segovia, N.; Lopez M, B.E.; Cisniega, G. [ININ, A.P. 18-1027, 11801 Mexico D.F. (Mexico); Valdes, C.; Armienta, M.A.; Mena, M. [Instituto de Geofisica, UNAM, 04510 Mexico D.F. (Mexico)

    2004-07-01

    Popocatepetl volcano is a high-risk active volcano in Central Mexico where the highest population density in the country is settled. Radon in the soil and groundwater together with water chemistry from samples of nearby springs is analysed as a function of the 2002-2003 volcanic activity. Soil radon indicated fluctuations related both the meteorological parameters and sporadic explosive events. Groundwater radon showed essentially differences in concentration due to the specific characteristics of the studied springs. Water chemistry showed stability along the monitoring period indicating also differences between springs. No anthropogenic pollution from volatile organic compounds was observed. (Author)

  14. E-waste: development of recycling process and chemical characterization of circuit printed - motherboard; Lixo eletronico: desenvolvimento de processo de reciclagem e caracterizacao quimica de placa de circuito impresso - motherboard

    Energy Technology Data Exchange (ETDEWEB)

    Junior, O.L.F.; Vargas, R.A.; Andreoli, M.; Martinelli, J.R.; Seo, E.S.M., E-mail: olfjunior@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN-CNEN/SP), Sao Paulo, SP (Brazil)

    2011-07-01

    The electro-electronic industry has been regulated by the National Politic of Solid Residues Act (PNRS) and Bill no. 7.404, concerning the actions, procedures, and method to collect, recycle and promotion of environmentally acceptable final destination of residues. The present work contributes to develop recycling process of printed circuit used in microcomputers and in its chemical characterization. The experimental procedure consisted of grinding, classification, magnetic and electrostatic separation, and separation based on density difference, followed by chemical characterization of the metallic and non metallic materials in the motherboard. It was determined that the amounts of Ag, Al, Ba, Cl, Cr, Cu, Fe, Mn, Pb, and Zn in the residue are above the toxicity allowable levels, and they are in the samples of the decanted material. Among the samples of the floating material, Al, Ba, Br, Ca, Cu, Fe, Pb (in less quantity), Si (in more quantity), and Sn, Ti and Zn were detected. Those materials can be useful in the preparation of red ceramics. (author)

  15. COMPOSICIÓN QUIMICA DE LA LECHE, DIGESTIBILIDAD in vitro DE LA MATERIA SECA Y PRODUCCIÓN EN VACAS ALIMENTADAS CON GRAMÍNEAS SOLAS O ASOCIADAS CON Lotus uliginosus

    Directory of Open Access Journals (Sweden)

    A. Morales

    2013-01-01

    Full Text Available La presente investigación tuvo como objetivo evaluar el uso de la leguminosa Lotus uliginosus como alternativa de inclusión dentro de las praderas en dos ecorregiones estratégicas de la sabana de Bogotá. en cada finca se evaluaron cuatro tratamientos: 1 kikuyo solo (P. clandestinum, 2 kikuyo asociado con trébol pata de pájaro ( P.clandes-tinum + L. uliginosus, 3 festuca alta sola (F. arundinacea y 4 Festuca alta asociada con trébol pata de pájaro (F. arundinacea + L. uliginosus. el número de bovinos varió de acuerdo a la capacidad de carga de cada finca. se utilizaron animales que se encontraban en el segundo tercio de lactancia durante un período experimental de siete días. en cada tratamiento se determinó la producción (L/día y calidad de leche (% de grasa, proteína y sólidos totales; en la pastura se evaluó la composición química (Ms, Fdn, Fda y la digestibilidad in vitro de la materia seca (divMs. se midió el consumo voluntario. en la finca Megaleche la producción de biomasa presentó diferencias significativas (P<0,05 entre los tratamientos destacándose el tratamiento del kikuyo solo; la calidad nutricional de las pasturas también presentó diferencias (P<0,04 destacándose el tratamiento de kikuyo + trébol pata de pájaro, asociación que también se destacó en consumo voluntario (P< 0.05 y producción de leche (P<0,05. en la finca Colega el contenido de proteína del forraje presentó diferencias cuando las gramíneas se asociaron con el trébol pata de pájaro (P<0,001. se concluyó que la introducción del Lotus en las praderas mejoró la producción de leche y consumo de materia seca en los animales.

  16. The influence of chemical composition and fineness on the performance of alkali activated cements obtained from blast furnace slags; A influencia da composicao quimica e da finura no desempenho de cimentos alcali ativados obtidos com escorias de alto forno

    Energy Technology Data Exchange (ETDEWEB)

    Langaro, Eloise Aparecida; Matoski, Adalberto, E-mail: elolangaro@hotmail.com, E-mail: adalberto@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba (Brazil); Luz, Caroline Angulski da; Buth, Islas Stein; Moraes, Maryah Costa de; Pereira Filho, Jose Ilo, E-mail: angulski@utfpr.edu.br, E-mail: islas_sb@hotmail.com, E-mail: maryah_moraes@hotmail.com, E-mail: ilofilho@yahoo.com.br [Universidade Tecnologica Federal do Parana (UTFPR), Pato Branco, PR (Brazil)

    2017-01-15

    New binders are being developed for concrete in order to reduce the environmental impact mainly related to CO{sub 2} emissions. Alkali -activated cements (CATs) are obtained from lime-aluminosilicate materials and an alkali activator and can reduce by 80% the emission of CO{sub 2} compared to Portland Cement (PC). Papers have also shown physical and mechanical properties similar or higher than those presented by the PC, however, the activation of raw material is complex. Recent papers have also have showed a strong influence of the characteristics of raw material on the performance of CAT, however, little mentioned in the literature.. Therefore, this paper aimed to analyze the influence of characteristics of blast furnace slag (fineness and chemical composition) on the behavior of activated alkali cements. For this purpose, two slags were used, A and B, which were submitted to different milling times; and activated using 5% of NaOH. Mortars and pastes were prepared for compressive strength testing (7 and 28 days), measurements of heat of hydration and investigation of microstructure (XRD and DSC) were made. The results showed that the mortar made with slag A reached a very good mechanical performance, close to 48MPa at 28 days, and higher formation of CSH, in opposite of slag B. The probable hypothesis of this study is that the system formed in CAT made with slag A (containing more Al{sub 2}O{sub 3}) could provide CSH with a greater incorporation of Al and a lower crystallinity, increasing the mechanical strength. (author)

  17. Effects of chemical composition and test parameters on the hot ductility of C-Mn-Al steels; Efeito da composicao quimica e parametros de ensaios sobre a ductilidade a quente de acos C-Mn-Al

    Energy Technology Data Exchange (ETDEWEB)

    Macedo, Marcelo C.S. de; Comineli, Osvaldo G; Pancieri, Jose G.P.; Oliveira, Maria A.L. de [Espirito Santo Univ., Vitoria, ES (Brazil). Dept. de Engenharia Mecanica; Souza Lima Cardoso, Geraldo I. de [Companhia Siderurgica de Tubarao (CST), Serra, ES (Brazil); Mintz, Barry [The City Univ., London (United Kingdom)

    1987-12-31

    The effects of Al content, as well as hot tensile test parameters on hot ductility of two C-Mn-Al steels are presented. Thermal cycle were carried out to study the influence of thermal oscillations during those compositions cooling, consisting of heating the samples up to a solubilization temperature, high enough to dissolve any phase which could possibly be present in the original ingot, and also to produce a coarser grain size. After 5 minutes at 1330 deg C, the steels were cooled in three different ways to reach test temperature and samples remain at this temperature for 5 minutes for stabilization before testing. Further, a preliminary comparison between hot ductility results, obtained when samples are molten and continuously cooled at two different rates, and those obtained for solution treated samples which are cooled at an intermediate cooling rate. For the two composition solution treated, a ductility was observed trough displaced from each other about 50 deg C, being the Al content the responsible for this difference. (author) 14 refs., 11 figs., 1 tab.

  18. In vitro evaluation of the chemical and morphological changes of the enamel surface using different bleaching techniques; Avaliacao in vitro das alteracoes quimica e morfologica da superficie do esmalte utilizando diferentes tecnicas de clareamento dental

    Energy Technology Data Exchange (ETDEWEB)

    Mattos, Alessandra de Siervi

    2003-07-01

    'In vitro' evaluation through MEV and EDS of the morphological and chemical changes, respectively, of the bovine enamel, submitted to different bleaching techniques. For the MEV evaluation eighteen apical thirds were pigmented and divided into two parts. One half of each sample was the control and the other half was bleached according to the protocol of each test group (n= 6). Group I - home bleaching with a 10% carbamide peroxide; group II bleaching with 35% hydrogen peroxide and LED; group III - bleaching with 35% hydrogen peroxide with diode laser bleaching. The same procedure was done with the eighteen samples which were analyzed through EDS and which had their buccal surface grinded and polished before the bleaching procedure in order to obtain more precise values of the fraction of calcium and phosphorus. The results showed no morphological changes among the analyzed control halves and the bleached halves. There was not a statistical significant difference about Ca and P values, among the control halves and the bleached halves regarding the chemical components (p< 0,05). (author)

  19. 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)

  20. Chemometrics application in fuel's MTR type chemical characterization by X-ray fluorescence; Aplicacao da quimiometria para caracterizacao quimica de combustiveis tipo MTR por fluorescencia de raios-X

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Clayton Pereira da

    2012-07-01

    In Brazil and worldwide the nuclear power has occupied a prominent position with many applications in industry, power generation, environment and medicine, improving the quality of tests and treatments, therefore people's lives. Uranium is the main element used in nuclear facilities and it s employed as base material to generation of electricity in the manufacture of radiopharmaceuticals. In the '50s, during the Cold War, the then newly created International Atomic Energy Agency proposed to oversee nuclear facilities and encourage the manufacture of nuclear fuels with low-enriched uranium (LEU) fuel came then type Material Test Reactor (MTR), manufactured initially in U{sub 3}O{sub 8} and U{sub 3}Si{sub 2} later, both dispersed in aluminum. The use of this technology requires a constant improvement of all processes involving the manufacture of MTR subject to several international protocols, which seek to ensure the reliability of the fuel from the standpoint of practical and environmental. In this context, the control of impurities, from the point of view of neutron economy, directly affects the quality of any nuclear fuel, so strict control is necessary. The literature has reported procedures which, beyond generating residues, are lengthy and costly, they need calibration curve and consequently reference materials. The aim of this work is to establish and validate a methodology for nondestructive quantitative chemical analysis, low cost and analysis time, as well as minimize the generation of waste, for multielement determination of major constituents (Utotal and Si) and impurities (B, Mg, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Cd and others) present in U3O8 and U{sub 3}Si{sub 2}, meeting the needs of nuclear reactors in the nuclear fuel qualification type MTR. For that purposes, will be applied the X-ray fluorescence technique which allows fast chemical and nondestructive analysis, aside from sample preparation procedures that do not require previous chemical treatments (dissolving, digesting, and others). To corrections like effects of spectral and matrix were applied and evaluated the fundamental parameter method, univariate calibration curve and multivariate calibration. The results were compared by means of statistical tests in accordance with ISO 17025 in MRCs (123 (1-7) and 124 (1-7)) MCRs of U{sub 3}O{sub 8} from New Brunswick Laboratory (NBL) and 16 U{sub 3}Si{sub 2} samples provided by CC of IPEN/CNEN-SP. The chemometrics is a promising method to determination of minor and major constituents on the U3Si2 and U3O8 basis nuclear fuel, because the precision and accuracy are statistically equal volumetric analysis, gravimetric and ICPOES methods. (author)

  1. Cement for oil well developed from ordinary cement: characterization physical, chemical and mineralogical; Cimento para poco de petroleo desenvolvido a partir de cimento comum: caracterizacao fisica, quimica e mineralogica

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, D.N.S.; Neves, G. de A.; Chaves, A.C.; Mendonca, A.M.G.D.; Lima, M.S. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Bezerra, U.T., E-mail: daninascimento.eng@gmail.com [Instituto Federal de Educacao, Ciencia e Tecnologia da Paraiba (IFPB), Campina Grande, PB (Brazil)

    2012-07-01

    This work aims to characterize a new type of cement produced from the mixture of ordinary Portland cement, which can be used as an option in the cementing of oil wells. To enable this work we used the method of lineal programming for the new cement composition, then conducted tests to characterize through particle size analysis by laser diffraction, chemical analysis by EDX, TGA, X-ray diffraction, time grip, resistance to compression. The overall result showed that the new cement had made low-C3A, takes more time to the CPP, thermal stability up to 500 ° C, the kinetics of hydration and low levels of major components consistent with the specifications of ABNT. (author)

  2. Chemical and mineralogical characterization of two commercial cements and its evolution in function of time; Caracterizacion quimica y mineralogica de dos cementos comerciales y su evolucion en funcion del tiempo

    Energy Technology Data Exchange (ETDEWEB)

    Gutierrez B, O.

    2014-07-01

    Mineralogical evolution of Portland cement is studied during hydration process using materials characterization techniques as X-ray diffraction (XRD) and scanning electron microscopy (Sem) in order to analyze the changes in the various cement minerals as alite, belite, celite, during processing to the hydrated phases of tobermorite gel, portlandite and ettringite, respectively, in the cement paste setting at different ages (3, 7 and 28 days). It was found that the hydration process occurs differently in each mineral because of their reaction rates or changes they experience in their crystals during processing of anhydrous to hydrated phase. You may notice changes in the appearance of the dough as you go hydration and the formation of tobermorite gel, portlandite and ettringite. (Author)

  3. Propositions of new correlations for prediction of physical-chemical properties in products of Brazilian crude oil; Proposicao de novas correlacoes para calculo de propriedades fisico-quimicas de derivados de petroleos brasileiros

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Ulysses Brandao [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The prediction of products properties is a useful tool in the petroleum industry, because it allows the estimation of quality when it is not possible to be determined it in the laboratory. Among existing correlations for properties prediction, the best known are those from the American Petroleum Institute (API), but there are limitations in the use of such models to estimate the properties of Brazilian petroleum products. A study was done to determine new correlations which would adjust to these oils. In this work a statistical treatment was used in a group of samples covering products from oils produced in several regions of Brazil. The results of this study are presented in this work. New correlations are proposed to estimate the aniline point, pour point and cloud point of Brazilian oil products. The data are showed graphically, with the experimental values plotted against the results of both the proposed and the API correlations. The average absolute deviations obtained for these correlations were smaller than those presented by the API equations, for the same data sets. This work helps to improve the quality estimation of Brazilian petroleum products using process simulators. (author)

  4. Physicochemical, rheological, thermal, and bread making properties of flour obtained from irradiated wheat;Propriedades fisico-quimicas, reologicas, entalpicas e de panificacao da farinha obtida de trigo irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Singer, Carolina Sobral

    2006-07-01

    Most of the methods that are nowadays used for food preservation derive from old times. Besides these methods, new non-thermal methods have been developed in order to improve food quality during its processing. Irradiation technology has a great contribution potential to improve preservation, storage and distribution of foods. Several studies from international literature have reported the efficiency of irradiation process on microbiological control of grains and their products. Due to the low technological quality of national wheat, Brazil depends on its import. Wheat is the main ingredient of bread which is one of the most important products of Brazilian people's diet. The objective of this work was to study the effect of ionizing radiation on wheat on physicochemical, rheological, and thermal properties of flour produced from this wheat, and consequently, its performance on bread making. All experiments were conducted on laboratory scale. Wheat was submitted to irradiation on different doses (0.0; 0.5; 1.0 and 2.0 kGy) and flour produced underwent physicochemical, rheological, thermal and microbiological analyses. Flour bread making performance was measured through quality of bread. None of the physicochemical, rheological or thermal parameters was influenced by irradiation, with the exception of Falling Number, which decreased significantly with the increase of irradiation dose, indicating the effect of irradiation on wheat starch, and consequently on dough's gelatinization. Bread quality parameters did also not show significant differences, and sensory analysis showed that bread produced from irradiated and non irradiated wheat did not present perceivable flavor. (author)

  5. 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)

  6. Program VODAM for treatment of mineral physico-chemical data, with a special application to the uranium case; Programa VODAM para tratamiento de datos de fisico-quimica mineral. Ejemplo de aplicacion al caso del uranio

    Energy Technology Data Exchange (ETDEWEB)

    Santoma Juncadella, L

    1972-07-01

    The VODAM program is written in FORTRAN IV language and makes a physico-chemical analysis of waters, for an element or a number of them, under investigation. A thermodynamical data files is incorporated, and is useful for a low temperature range. It is the basic nucleus for a series of programs of physico-chemical interpretation of hydrogeochemical data and automatic construction of equilibrium diagrams. (Author) 13 refs.

  7. Obtaining of a barium compound by combustion chemistry and their evaluation as Co adsorbent; Obtencion de un compuesto de bario por combustion quimica y su evaluacion como adsorbente de Co

    Energy Technology Data Exchange (ETDEWEB)

    Rosas G, N [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2008-07-01

    In this work, barium carbonate synthesized by chemical combustion method using a chemical precursor prepared by the combination of barium nitrate and urea as a fuel, with a 1:1 molar ratio in aqueous solution, the chemical precursor was heated to evaporate excess water, producing a homogeneous viscous liquid, that when heated to 900 centi grades for 5 minutes an exothermic reaction was produced very quickly and abruptly, forming a white powder final product, fine porous, little spongy, dry and crystalline ready to be used as material adsorbent. Additionally, the effect of water on the synthesis by chemical combustion was studied. Simultaneously, and with the purpose of comparing the advantages and disadvantages of the method by chemical combustion, barium carbonate was synthesized by precipitation method using barium nitrate salts and sodium carbonate. Synthesized barium carbonate, was characterized by X-ray diffraction, thermal gravimetric analysis, infrared spectrometry and scanning electron microscopy. We studied the adsorption capacity of Co present in aqueous solution by static tests on materials synthesized at room temperature using the neutron activation analysis. It was found that the synthesis by chemical combustion provides an interesting alternative compared to the synthesis by precipitation because it offers simplicity of synthesis and speed to have a good adsorbent material. It was found that the barium carbonate synthesized by the chemical combustion method using in their synthesis 1.0 ml of water, was the one who achieved the maximum adsorption capacity of 95.6% compared with the barium carbonate prepared by precipitation, which reached a capacity adsorption of 51.48%. (Author)

  8. Physicochemical characterization of steel slag post-processed as aggregate for sustainable concrete; Caracterizacao fisico-quimica de agregados de escoria de aciaria LD pos-processada para concretos sustentaveis

    Energy Technology Data Exchange (ETDEWEB)

    Souza, B.P. de; Fontes, W.C.; Carvalho, J.M.F. de; Mol, R.M.R.; Costa, E.C.P. da; Peixoto, R.A.F., E-mail: wannarquit@gmail.com [Universidade Federal de Ouro Preto (LMC/UFOP), MG (Brazil). Laboratorio de Materiais de Construcao Civil

    2016-07-01

    The concrete is the material most widely used in construction, consuming a large amount of natural resources for its production. Therefore, this work analyzes the technical and environmental aspects of concrete with full replacement of natural aggregates for processed LD steelmaking slag. The experimental program comprehends physical characterization - particle size distribution, moisture content, bulk and specific density - and elemental chemical characterization with X-Ray Fluorescence, and mineralogical characterization via X-Ray Diffraction. Morphological characterization was performed through a stereomicroscope. From these results, concrete with compressive strengths of 20 and 40 Mpa were developed, with ABPC methodology. These were characterized in the fresh and hardened states, obtaining results favorable to the steelmaking slag application in Portland cement concrete. This sustainable concrete features properties similar conventional concrete, and contributing to sustainability of buildings. (author)

  9. In vitro study of morphological and chemical modification threshold of bovine dental enamel irradiated by the holmium laser; Estudo in vitro das alteracoes morfologicas e quimicas do esmalte dental bovino irradiado pelo laser de holmio

    Energy Technology Data Exchange (ETDEWEB)

    Eduardo, Patricia Lerro de Paula

    2001-07-01

    The aim of this study is to investigate the Ho:YLF laser effects on the dental enamel surface with regards to its morphology, thermal variations during its irradiation in the pulp chamber and its increased resistance to demineralization through quantitative analysis of calcium and phosphorous atoms reactive concentrations in samples. Twenty samples of bovine enamel were used and divided in four groups: control - acidulated phosphate fluoride (APF) application followed by demineralization treatment with lactic acid; irradiation with Ho:YLF laser (100 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid; irradiation with Ho:YLF laser (350 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid: and irradiation with Ho:YLF laser ( 450 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid. Ali samples were quantified according to their calcium and phosphorous atoms relative concentrations before and after the treatments above. X-Ray fluorescence spectrochemical analysis and scanning electron microscopy were carried out. It was observed an increase on the calcium and phosphorous atoms concentration ratio and therefore the enamel demineralization reduction as a result of the lactic acid treatment in the samples irradiated with the holmium laser followed by the APF application. In order to evaluate the feasibility of this study for clinical purposes, morphological changes caused by the holmium laser irradiation were analyzed. Such modifications were characterized by melted and re-solidified regions of the enamel with consequent changes on its permeability and solubility. Temperature changes of ten human pre-molars teeth irradiated with 350 J/cm{sup 2} and 450 J/cm{sup 2} were also monitored in the pulp chamber in real time. Temperature increases over 4,20 C did not occur. The results obtained from this study along with the results from previous researches developed at 'Center for Lasers and Applications (IPEN)', indicate the holmium laser as a promising alternative for the Preventive Dentistry. (author)

  10. In vitro evaluation of the chemical and morphological changes of the enamel surface using different bleaching techniques; Avaliacao in vitro das alteracoes quimica e morfologica da superficie do esmalte utilizando diferentes tecnicas de clareamento dental

    Energy Technology Data Exchange (ETDEWEB)

    Mattos, Alessandra de Siervi

    2003-07-01

    'In vitro' evaluation through MEV and EDS of the morphological and chemical changes, respectively, of the bovine enamel, submitted to different bleaching techniques. For the MEV evaluation eighteen apical thirds were pigmented and divided into two parts. One half of each sample was the control and the other half was bleached according to the protocol of each test group (n= 6). Group I - home bleaching with a 10% carbamide peroxide; group II bleaching with 35% hydrogen peroxide and LED; group III - bleaching with 35% hydrogen peroxide with diode laser bleaching. The same procedure was done with the eighteen samples which were analyzed through EDS and which had their buccal surface grinded and polished before the bleaching procedure in order to obtain more precise values of the fraction of calcium and phosphorus. The results showed no morphological changes among the analyzed control halves and the bleached halves. There was not a statistical significant difference about Ca and P values, among the control halves and the bleached halves regarding the chemical components (p< 0,05). (author)

  11. Characterization of TiO{sub 2} thin films obtained by metal-organic chemical vapour deposition; Caracterizacao de filmes finos de TiO{sub 2} obtidos por deposicao quimica em fase vapor

    Energy Technology Data Exchange (ETDEWEB)

    Carriel, Rodrigo Crociati

    2015-07-01

    Titanium dioxide (TiO{sub 2}) thin films were grown on silicon substrate (100) by MOCVD process (chemical deposition of organometallic vapor phase). The films were grown at 400, 500, 600 and 700 ° C in a conventional horizontal equipment. Titanium tetraisopropoxide was used as source of both oxygen and titanium. Nitrogen was used as carrier and purge gas. X-ray diffraction technique was used for the characterization of the crystalline structure. Scanning electron microscopy with field emission gun was used to evaluate the morphology and thickness of the films. The films grown at 400 and 500°C presented anatase phase. The film grown at 600ºC presented rutile besides anatase phase, while the film grown at 700°C showed, in addition to anatase and rutile, brookite phase. In order to evaluate the electrochemical behavior of the films cyclic voltammetry technique was used. The tests revealed that the TiO2 films formed exclusively by the anatase phase exhibit strong capacitive character. The anodic current peak is directly proportional to the square root of the scanning rate for films grown at 500ºC, suggesting that linear diffusion is the predominant mechanism of cations transport. It was observed that in the film grown during 60 minutes the Na+ ions intercalation and deintercalation easily. The films grown in the other conditions did not present the anodic current peak, although charge was accumulated in the film. (author)

  12. Chemical signature study of tupiguarani ceramic tradition from Central region of the Rio Grande do Sul state, Brazil; Estudo de assinaturas quimicas em ceramica da tradicao tupiguarani da regiao central do estado do Rio Grande do Sul, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Bona, Irene Akemy Tomiyoshi

    2006-07-01

    In this work a model based on experimental results using chemical composition data of the pottery sherds applied to Spearmann's no parametric test, principal component analysis and discriminant analysis, was applied. The samples are soils and Tupiguarani Tradition pottery sherd from the central area of the Rio Grande do Sul State. The chemical elements , Al, Ba, Ca, Cr, Fe, K Mn, Pb, Rb, S, Si, Sr, Ti, V and Zn were determined by energy dispersive X-ray fluorescence (EDXFR) while Ce, Cu, Gd, La, Nd, Pr, Sm, Th and Y by high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) techniques. Relationships among the pottery characteristics, studied sites and sherd dispersion in the several sites were proposed. Indications of chemical signature of the small pottery with function to go or not to the fire were observed. The largest dispersion is of small pottery with surface treatment no corrugated. The potteries chemical fingerprints from Ijui River, Ibicui-Vacacai Mirim River and Jacui River were verified. (author)

  13. Chemometrics application in fuel's MTR type chemical characterization by X-ray fluorescence; Aplicacao da quimiometria para caracterizacao quimica de combustiveis tipo MTR por fluorescencia de raios-X

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Clayton Pereira da

    2012-07-01

    In Brazil and worldwide the nuclear power has occupied a prominent position with many applications in industry, power generation, environment and medicine, improving the quality of tests and treatments, therefore people's lives. Uranium is the main element used in nuclear facilities and it s employed as base material to generation of electricity in the manufacture of radiopharmaceuticals. In the '50s, during the Cold War, the then newly created International Atomic Energy Agency proposed to oversee nuclear facilities and encourage the manufacture of nuclear fuels with low-enriched uranium (LEU) fuel came then type Material Test Reactor (MTR), manufactured initially in U{sub 3}O{sub 8} and U{sub 3}Si{sub 2} later, both dispersed in aluminum. The use of this technology requires a constant improvement of all processes involving the manufacture of MTR subject to several international protocols, which seek to ensure the reliability of the fuel from the standpoint of practical and environmental. In this context, the control of impurities, from the point of view of neutron economy, directly affects the quality of any nuclear fuel, so strict control is necessary. The literature has reported procedures which, beyond generating residues, are lengthy and costly, they need calibration curve and consequently reference materials. The aim of this work is to establish and validate a methodology for nondestructive quantitative chemical analysis, low cost and analysis time, as well as minimize the generation of waste, for multielement determination of major constituents (Utotal and Si) and impurities (B, Mg, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Cd and others) present in U3O8 and U{sub 3}Si{sub 2}, meeting the needs of nuclear reactors in the nuclear fuel qualification type MTR. For that purposes, will be applied the X-ray fluorescence technique which allows fast chemical and nondestructive analysis, aside from sample preparation procedures that do not require previous chemical treatments (dissolving, digesting, and others). To corrections like effects of spectral and matrix were applied and evaluated the fundamental parameter method, univariate calibration curve and multivariate calibration. The results were compared by means of statistical tests in accordance with ISO 17025 in MRCs (123 (1-7) and 124 (1-7)) MCRs of U{sub 3}O{sub 8} from New Brunswick Laboratory (NBL) and 16 U{sub 3}Si{sub 2} samples provided by CC of IPEN/CNEN-SP. The chemometrics is a promising method to determination of minor and major constituents on the U3Si2 and U3O8 basis nuclear fuel, because the precision and accuracy are statistically equal volumetric analysis, gravimetric and ICPOES methods. (author)

  14. Preparation of (+)-{alpha}-terpineol from (+)-limonene: monoterpenes with pleasant odor in a project for undergraduate organic chemistry laboratory; Preparacao do (+)-{alpha}-terpineola a partir do (+)-limoneno: monoterpenos de odor agradavel em um projeto para quimica organica experimental

    Energy Technology Data Exchange (ETDEWEB)

    Baptistella, Lucia Helena Brito; Imamura, Paulo Mitsuo; Melo, Leandro Vilela de; Castello, Claudio [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Inst. de Quimica], e-mail: lhbb@iqm.unicamp.br

    2009-07-01

    A synthesis of (+)-{alpha}-terpineol from (+)-limonene was proposed as a project for undergraduate organic laboratory course. Terpineol is a useful flavor and fragrance compound, and several aspects of this preparation are suited for experimental organic classes, including basic techniques for extraction and analyses of essential oils, different reaction types and the possibility of a high degree of student interest. (author)

  15. Crack propagation in stainless steel AISI 304L in Hydrogen Chemistry conditions (HWC); Propagacion de Grietas en Acero Inoxidable AISI 304L en Condiciones de Quimica de Hidrogeno (HWC)

    Energy Technology Data Exchange (ETDEWEB)

    Diaz S, A.; Fuentes C, P.; Merino C, F. [ININ, Carretera Mexico -Toluca s/n, La Marquesa, Ocoyoacac, Mexico (Mexico); Castano M, V. [Instituto de Fisica Aplicada, UNAM, Km 15.5 Carretera Queretaro-San Luis Potosi, Juriquilla, Queretaro (Mexico)]. e-mail: ads@nuclear.inin.mx

    2006-07-01

    Velocities of crack growth in samples type CT pre cracking of stainless steel AISI 304l solder and sensitized thermally its were obtained by the Rising Displacement method or of growing displacement. It was used a recirculation circuit that simulates the operation conditions of a BWR type reactor (temperature of 280 C and a pressure of 8 MPa) with the chemistry modified by the addition of hydrogen with and without the addition of impurities of a powerful oxidizer like the Cu{sup +} ion. In each essay stayed a displacement velocity was constant of 1x10{sup -9} m/s, making a continuous pursuit of the advance of the crack by the electric potential drop technique. Contrary to the idea of mitigation of the crack propagation velocity by effect of the addition of the hydrogen in the system, the values of the growth velocities obtained by this methodology went similar to the opposing ones under normal operation conditions. To the finish of the rehearsal one carries out the fractographic analysis of the propagation surfaces, which showed cracks growth in trans and intergranular way, evidencing the complexity of the regulator mechanisms of the IGSCC like in mitigation conditions as the alternative Hydrogen Chemistry. (Author)

  16. Effects on physicochemical, microbiological and sensory characteristics of honey bee samples submitted to gamma radiation; Efeitos nas caracteristicas fisico-quimicas, microbiologicas e sensoriais em amostras de mel de abelhas submetidas a radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Bera, Alexandre

    2010-07-01

    Honey production in Brazil has increased considerably and gaining pro eminence on the international market, as a result many demands have become part of the productive honey chain. In addition to the analyses provided for the Brazilian legislation, international market demand products that meet the most stringent quality standards. Honey has interesting characteristics due to its constitution, but even so there are problems that can change some how your identity and quality. The application of gamma radiation is a viable proposal which promotes the reduction of bio burden without changing the constitution and most importantly the physicochemical properties, with smaller nutritional losses when compared to other treatments used in foods. This study beyond the physicochemical parameters required by Brazilian regulation also included other relevant analyses, including FT-IR ATR. Microbiological analyses were carried out on samples of pure honeys and subsequently inoculated microbial known loads to assess the action of gamma radiation in doses of 5 and 10 kGy. The triangular test was used to differentiate the irradiated and not irradiated. samples The major changes that have occurred in samples of honeys were mainly in concentrations of HMF (hydroxymethylfurfural) and diastase activity occurring a significant decrease in all analyzed samples. There was a reduction microbiological from the application of the 5 kGy, reaching absence with 10 kGy dose except Paenibacillus larvae. The sensory analysis conducted on samples of honey and honey irradiated with 5, 10 and 15 kGy doses, pointed out that there is no significant difference (5%) between irradiated and control samples. The application of gamma radiation in honeys proved a very useful method in microbiological decontamination, featuring few changes in the product at doses up to 10 kGy. (author)

  17. Determination and analysis of the physical chemical characteristics of witness coupons of boral for the CNLV; Determinacion y analisis de las caracteristicas fisico quimicas de cupones testigo de boral para la CNLV

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez M, J.L.; Aguilar H, F.; Rivero G, T.; Carrillo M, R. [ININ, Apdo. Post 18-1027, Col Escandon, 11801 Mexico D.F. (Mexico)]. E-mail: jlgm@nuclear.inin.mx; fah@nuclear.inin.mx; trg@nuclear.inin.mx; racm@nuclear.inin.mx

    2004-07-01

    The burnt fuel elements that are extracted in each charging of the Units 1 and 2 of the Nuclear Power Plant of Laguna Verde, are deposited in shelves placed in the storage reservoir designed for this end. Each cell or storage shelf has a structure type cage. Among the cells neutron absorber material is placed, (Boral), what allows to avoid the possible criticality that could settle down when accumulating in the storage the irradiated fuel elements. This boral has been designed to maintain its characteristics of thermal neutron absorber during a lifetime of the plant. To check that the wings and the Boral have not suffered some degradation or some change due to the environmental conditions in the warehouse, it is necessary to watch over their physical and chemical characteristics periodically, what is carried out by a surveillance program based on Badges or manufactured witness coupons of the same material that the wings. The badges witness are embedded in a special wing, which is placed in the place with more radiation in the pool. In this work the laboratory tests carried out in the ININ to the coupon witness 03 of the Unit 2, (II-03) are described, being presented the results and obtained conclusions. (Author)

  18. Changes in physico-chemical properties of soil by adding organic amendments in a tomato crop; Cambios en la propiedades fisico-quimicas del suelo por adicion de enmiendas organicas en cultivo de tomate

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Navarro, A.; Marin Salneandro, P.; Delgado Iniesta, M. J.

    2009-07-01

    This study possible changes in the physico-chemical properties of soil under intensive cultivation of tomatoes after the addition of two different types of organic amendments: a natural as sheep manure and synthetic made. Trial plots that were designed are located in the NE of the province of Granada, in Puebla de Trial plots that were designed are located in the NE of the province of Granada, in Puebla de Don Fadrique, in the are that in recent years, change are very important in agriculture, from traditional farms extensive cultivation of rain-fed cereal crops such as intensive vegetale broccoli or tomatoes. (Author) 16 refs.

  19. Microstructural characteristics of steel rebar submitted to the process of self - tempering; Caracterizacao microestrutural de superficies e interfaces de vergalhoes de aco auto-revenidos utilizando Microscopia Eletronica de Varredura (MEV) e analise quimica

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, M.F.O., E-mail: matheusfob@yahoo.com.br [Universidade Federal de Minas Gerais (UFMG), MG (Brazil)

    2014-07-01

    Every day the construction industry seeks new alternatives to maximize use of the materials provided new tools for structural design of the new techniques in welding rods. In this sense, this work proposes to study the mechanical properties of steel rebar self-tempering for civil construction, choosing the bars from 6.3 to 25.4 mm in diameter for the study. The cooling process of rebar, after rolling, known as self-tempering produces a rebar with excellent mechanical properties and low cost to the plant, they put the rebar shall be composed of concentric layers with different mechanical properties among themselves. To study the influence of these layers on the mechanical behavior of rebar microstructural characterization was made by means of electron microscopy analysis of transmitted light and scanning of all samples. From the results it was found that only the bars 20 and 25mm diameter had a heat treatment for self-tempering relevant. (author)

  20. Preparation and physico-chemical characterization of inclusion complexes between local anesthetics and hydroxypropyl-{beta}-cyclodextrin; Preparacao e caracterizacao fisico-quimica de complexos de inclusao entre anestesicos locais e hidroxipropil-{beta}-ciclodextrina

    Energy Technology Data Exchange (ETDEWEB)

    Moraes, Carolina Morales; Abrami, Priscila; Goncalves, Marcos Moises; Andreo Filho, Newton [Universidade de Sorocaba, SP (Brazil); Fernandes, Sergio Antonio; Paula, Eneida de [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Inst. de Biologia. Dept. de Bioquimica; Fraceto, Leonardo Fernandes [UNESP, Sorocaba, SP (Brazil). Dept. de Engenharia Ambiental]. E-mail: leonardo@sorocaba.unesp.br

    2007-07-15

    S(-) Bupivacaine (S(-)BVC) and Lidocaine (LDC) are widely used local anesthetics (LA). Hydroxypropyl {beta}-cyclodextrin (HP-{beta}-CD) is used as a drug-carrier system. The aim of this work was to characterize inclusion complexes between LA and HP-{beta}-CD. The affinity constants determined at different pHs show favourable complexation. The release kinetics experiments showed that S(-)BVC and LDC changed the released profiles in the presence of HP-{beta}-CD. Nuclear magnetic resonance experiments gave information about the interaction between LA and the cyclodextrin cavity. This study focused on the physicochemical characterization of drug-delivery formulations that come out as potentially new therapeutic options for pain treatment. (author)

  1. Aluminium polychloride in the groundwater potabilization process. Its performance as a coagulant in the aluminium chemistry domain; Policloruro de aluminio en el proceso de potabilizacion de aguas superficiales. Su comportamiento como coagulante dentro del ambito de la quimica del aluminio

    Energy Technology Data Exchange (ETDEWEB)

    Torra, A.; Valero, F. [Aigues Ter Llobregat. ATLL. Barcelona (Spain); Bisbal, J.L.; Tous, J.F. [Kemira Iberica. Barcelona (Spain)

    1998-12-01

    The development of prepolymerized coagulants of metallic salts, such as aluminium polychloride, has led to an improvement in the coagulation of drinking water and sewage, in front of the so-called hydrolyzed coagulants, such alum or ferric chloride. This paper describes the chemical properties and the advantages of the aforementioned coagulants: purification efficiency, working pH range, sensitivity to low temperatures, sludge filterability and residual Al. As a practical case it is described its application in the purification of surface waters of Llobregat river in Abrera (Barcelona). (Author) 32 refs.

  2. Evolution of {sup 222} Rn and chemical species related with eruptive processes of the Popocatepetl volcano; Evolucion de {sup 222} Rn y especies quimicas relacionadas con procesos eruptivos del volcan Popocatepetl

    Energy Technology Data Exchange (ETDEWEB)

    Aranda, P.; Ceballos, S.; Cruz, D.; Hernandez, A.; Lopez, R.; Pena, P.; Salazar, S.; Segovia, N.; Tamez, E. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1997-07-01

    The {sup 222} Rn monitoring in the Popocatepetl volcano was initiated on 1993. At December 21, 1994 it is initiated an eruptive stage in the volcano with gas emission, ashes and the lava dome formation on the crater at middle 1996. During all this time it has been determined radon concentrations on soils with active and passive detectors. In this work the changes in radon contents are reported also the physicochemical parameters in spring water related with the volcanic building associated to the recent activity of the volcano. (Author)

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2016-07-01

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

  4. Effects of gamma radiation of Cobalt-60 on arabica and conillon seeds coffea: physic-chemistry evaluation; Efeitos da radiacao gama do Cobalto-60 em sementes de cafe arabica e conillon: avaliacao fisico-quimica

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcus Henriques da

    2012-07-01

    Brazil is the largest producer and exporter of coffee in the world. The coffee bean is one of the main products of the Brazilian trade balance. Two species of coffee are the most economically important: the Coffea arabica L. and Coffea canephora Pierre is the largest representative of the Coffea canephora Pierre is the coffea conillon. Food irradiation is an area of research that aims to increase the shelf life of foods and controlling pests. This study aimed to verify the physicochemical variables of Arabica coffee and conillon were affected when exposed to doses of gamma radiation from cobalt-60. The samples were provided by Polo in Coffee Quality Technology, Federal University of Lavras - UFLA. The coffee samples were subjected to irradiation doses: 0 (control), 5 kGy and 10 kGy, a multipurpose irradiator of IPEN - Research Institute of Nuclear Energy and the University of São Paulo, at a rate of 7.5 kGy / hour. For irradiation the samples were vacuum-packed in appropriate packaging aluminised. After the process of irradiation the samples were stored at a temperature of 15 ± 1 deg C and relative humidity of 17 ± 1%. The following analyzes were performed: levels of total sugars, glucose, sucrose, caffeine, humidity, pH, total acidity, electrical conductivity and fibers. Analyses were performed 1, 30, 60 and 90 days after irradiation, and the results were submitted to analysis of variance and means were compared by Tukey test at 5%. It was observed that the analysis results of the samples irradiated with 5 kGy and 10 kGy showed values similar to the control. It was concluded that irradiation did not induce deleterious effects on arabica coffee seeds and conillon irradiated with 5 kGy and 10 kGy to 90 days after irradiation. (author)

  5. Study of the influence of chemical composition on the pozzolanicity of soda-lime glass microparticles; Estudo da influencia da composicao quimica na pozolanicidade de microparticulas de vidro soda-cal

    Energy Technology Data Exchange (ETDEWEB)

    Sales, R.B.C. [Universidade do Estado de Minas Gerais (UEMG), MG (Brazil). Departamento de Ciencias e Tecnologia; Sales, F.A.; Correa, E.C.; Patricio, P. [Centro Federal de Educacao Tecnologica de Minas Gerais (CEFET-MG), MG (Brazil); Mohallem, N.D.S.; Aguilar, M.T.P., E-mail: teresa@ufmg.br [Universidade Federal de Minas Gerais (UFMG), MG (Brazil)

    2014-07-01

    The use of residues presents interesting possibilities for obtaining eco-efficient concretes. Research has investigated the use of glass residue in Portland cement composite, whether as an aggregate or a supplementary material. However, there is still no consensus on the influence of the chemical composition of glass on the behaviour of the composites in which it is used. This paper aims to analyse the influence of this composition on the performance of cement composites produced with microparticles of colourless and amber glass. Pozzolanicity was assessed by means of direct tests (modified Chapelle and electrical conductivity) and indirect tests (chemical characterization, X-ray diffraction, thermo analysis and pozzolanic activity index). Most of the results show that microparticles of both types of glass display pozzolanic activity, with no significant differences between them. This indicates the potential for the use of glass microparticles as a supplementary material in cement composites. (author)

  6. Effect of welding process on microstructure, microhardness and composition chemistry of stainless steel coatings applied by welding; Efeito do processo de soldagem na microestrutura, microdureza e composicao quimica de revestimentos de aco inoxidavel aplicados por soldagem

    Energy Technology Data Exchange (ETDEWEB)

    Melo, R.H.F. de; Maciel, T.M., E-mail: raphael.engmec@gmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Programa de Pos-Graduacao em Mecanica; Costa, J.; Santa, R.A.C. [Universidade Federal de Campina Grande (UFCG), Cuite, PB (Brazil). Unidade Academica de Quimica

    2012-07-01

    This study evaluates the influence of welding parameters on the chemical composition of weld overlays of the AWS E 308-L T1 applied by the FCAW and SAW process, as well as their influence on the microstructure and microhardness of the weld overlays. The characterization of chemical composition was performed by EDX (Energy Dispersive X-ray Analysis), the microstructure was investigated by optical microscopy and Vickers microhardness. The contents of Cr, Ni, Mn, Mo, Nb and Si varied as a function of welding parameters, the microstructure and microhardness varied as a function of heat input and chemical composition. The resulting microstructure showed an austenitic matrix with lacy ferrite and ferrite FA, with an average hardness of 191.6 HV for the FCAW process and 210 HV for the SAW process. (author)

  7. Analysis of energy cogeneration incentive politics to a sodium-chlorine Brazilian chemical plant energy cogeneration; Analise de politicas de incentivo a cogeracao de energia numa planta quimica brasileira de soda-cloro

    Energy Technology Data Exchange (ETDEWEB)

    Bastos, J.B.V.; Borschiver, S. [Universidade Federal do Rio de Janeiro (CT/UFRJ), RJ (Brazil). Centro de Tecnologia], E-mail: suzana@eq.ufrj.br; Szklo, A.S. [Universidade Federal do Rio de Janeiro (PPE/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Programa de Planejamento Energetico], E-mail: szklo@ppe.ufrj.br; Andrade, M.H.S. [Braskem S.A., Rio de Janeiro, RJ (Brazil)], E-mail: marcio.andrade@braskem.com.br

    2010-07-01

    This paper evaluates, from a pont of view of investor and through the use of a simulator, the impact of incentive politics to the cogeneration, from the sugar cane bagasse, at a plant for production of sodium-chlorine.

  8. Physical and chemical evaluation of the effect of a magnetic field on the electrodeposition of Ni in low carbon steel; Evaluacion fisica y quimica del efecto de un campo magnetico en la electrodeposicion de Ni en acero bajo carbono

    Energy Technology Data Exchange (ETDEWEB)

    Campo G, G. A.

    2015-07-01

    In this study nickel coatings were obtained, with and without the presence of magnetic field at 60 degrees Celsius for 7, 12 and 17 minutes on substrates of AISI 1018 carbon steel, from a classical type Watts solution. The properties of the coatings were studied by X-ray diffraction, scanning electron microscopy and atomic force microscopy, hardness tester and roughness tester, the electrochemical behavior of the films was also studied through RP and EIE and also capacitance calculations, corrosion rate and thickness were made. In general, the magnetic field has a negative influence on the physical and chemical properties of an electrodeposited Ni steel AISI 1018. The details are discussed in this research. (Author)

  9. Effects of ionizing radiation in the physico-chemical characteristics of red wine Cabernet Sauvignon; Efeitos da radiacao ionizante nas caracteristicas fisico-quimicas do vinho tinto Cabernet Sauvignon

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Fellipe Souza da; Leiras, Anderson; Wagner, Walsan, E-mail: fellipe.souzadasilva@gmail.com [Instituto de Radioprotecao e Dosimetria, (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2014-07-01

    The oenology in the current days is increasingly aimed obtain improvements on wine quality produced without there the deterioration of characteristics of the same, using new technologies for such order. The objective of present work will be the application of the radiation ionizing in wines Cabernet Sauvignon, with the interest of analyzing its effects on physic-chemical characteristics of this wines, such as quality, aging and etc. Were analyzed the following strands: degree alcoholic; dry extract; density and absorbance with spectrometer (420, 520 and 620 nm). (author)

  10. Knowing Your Partner: The Evolution of Brazilian Special Operations Forces

    Science.gov (United States)

    2012-08-01

    Group’s Rescue and Retaking Special Group carrying out a counterterrorism tactical exercise. (Photo courtesy Tecnologia & Defesa) Bottom right...Forces Battalion supported by an Army Aviation HM-1 Pantera helicopter; “Operation ASPA” May 2005, Brasilia/Fed- eral District (Photo: Tecnologia ...Defesa) Top right: Amphibious Commandos carry out a maritime infiltration sup- ported by an S34-Tikuna submarine. (Photo: Tecnologia & Defesa) Bottom

  11. Journal of Chemical Sciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Author Affiliations. Abraham F Jalbout1 Md Abul Haider Shipar2. Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico; Faculty of Engineering, Chiba University, Inage-ku, Chiba 263-8522, Japan ...

  12. Equilibrium and Kinetic Studies of Cu (II), Cd (II), Pb (II) and Fe (II ...

    African Journals Online (AJOL)

    ADOWIE PERE

    from Aqueous Solution Using Cocoa (Theobroma cacao) Pod Husk. *1. OBIKE, AI;. 1. IGWE, JC;. 1. EMERUWA, CN;. 2. UWAKWE, KJ. 1 Department of Pure & Industrial Chemistry, Abia State University, Uturu, Abia State, ..... Eclectica Quimica.

  13. Meeting on Solute/Solvent Interactions Held in Aberdeen Proving Ground, Maryland on May 29-30, 1991

    Science.gov (United States)

    1992-01-01

    the magnitudes of the nuclear charges and therefore cannot be assumed to indicate relative reactivities toward nucleophiles. There is accordingly no...APPENDIX 3 ORGANIZATIONS OF AUTHORS IN THESE PROCEEDINGS Central Michigan University 49 Instituto de Quimica Fisica 33 La Sierra University, Riverside 71...Aberdeen Proving Gd, MD Joxe-Luis Abbud Christopher Cramer Instituto de Quimica Fisica SMCCR-RSP-C "Rocasolano" U.S. Army Chemical RD&E Center Conajo

  14. Redes de colaboração científica na área de química no Brasil: um estudo baseado nas coautorias dos artigos da revista Química Nova

    Directory of Open Access Journals (Sweden)

    Cristina Gomes de Souza

    2012-01-01

    Full Text Available In this paper we built three co-authorship networks displaying the acquaintances between countries, universities and authors that have published papers in Quimica Nova from 1995 to 2008. Our research was conducted applying a bibliometric approach to 1782 papers and over 4200 authors. Centrality measures were used and the most significant actors of each network were pointed out. The results using the centrality metrics and the network structures indicated that Quimica Nova resembles a typical scientific community.

  15. Area Handbook Series: Portugal, A Country Study

    Science.gov (United States)

    1993-01-01

    result of their excessive dependence on debt financing, Quimigal and Setenave, as well as Companhia Nacional de Petro- quimica (CNP), a state-owned...Gerais de Material de Engenharia (OGME) for the overhaul of military vehicles; and Oficinas Gerais de Material Aeronautico (OGMA) for maintenance and...CNP. See Companhia Nacional de Petro- (CCP). See Portuguese Confederation quimica of Commerce coal, 149 Confederaqio Geral dos Trabalhadores coastline

  16. International Symposium on Electrochemical Impedance Spectroscopy (2nd) Held in Santa Barbara, California on 12-17 July 1992 (Extended Abstracts)

    Science.gov (United States)

    1992-01-01

    Aplicada. M.Martinez and S.Bruque, Departamento.de Quimica Inorgknica. Facultad de Ciencias, Universidad de MAlaga, E-29071 Milaga,(SPAIN). Hydrogen...Departamento de QuImica , Universidade de Coimbra, 3049 Coimbra Codex, Portugal Studies of aluminium corrosion in chloride media have been carried out under a...Caixa Postal 68505, CEP: 21945, RJ, Brazil. z-Depto. de Fisico-Qulmica - IQ/UFRJ - RJ, Brazil. 9-Escola de Engenharia - UFRJ - RJ, Brazil. INTRODUCTION

  17. Acurácia dos indicadores de risco do Programa de Defesa da Vida dos Lactentes em região do Estado de São Paulo, Brasil Accuracy of risk indicators of an Infant Life Defense Program in a region of S. Paulo State, Brazil

    Directory of Open Access Journals (Sweden)

    Davi Rumel

    1992-02-01

    Full Text Available O Programa de Desfesa da Vida dos Lactentes da Secretaria de Higiene e Saúde do Munícipio de Bauru tem um critério diagnóstico para a inclusão de recém-nascidos dentro do programa. Este critério é formado pela combinação de 11 indicadores clínicos e sociais de risco à mortalidade infantil de fácil obtenção no momento do parto. Decidiu-se propor um critério diagnóstico alternativo, a partir dos mesmos indicadores clínicos e sociais, com maior sensibilidade para a mesma proporção de crianças matriculadas no Programa. Os dados hospitalares foram coletados no período de 11 de maio de 1986 a 10 de novembro de 1987. A mortalidade compreende o período entre 7 dias e 6 meses, que é o período de seguimento das crianças pelo Programa. Calculou-se para cada indicador o risco relativo bruto numa análise univariada e o risco relativo ajustado pela técnica de regressão logística. Criou-se um sistema de pontuação baseado na somatória dos excessos de risco de cada indicador.The Infant Life Defense Program of Health Department of Bauru City SP, Brazil, has diagnostic criteria for the inclusion of newborns. The diagnostic criteria combine eleven social and clinical indices of infant mortality risk, defined by in the light of a review of the literature and previous case studies. The indices are easily collected at the hospitals during delivery. The objective of this study is to propose an alternative diagnostic criteria, using the same social and clinical indices, of greater sensitivity and same proportion of children included in the program. The data on the newborns were collected between May 11, 1986 and November 10, 1987. The mortality period was defined as between 7 days and 6 months, which was the follow-up period for the infants enrolled in the program. The method of analysis was the determination for each index of the crude relative risk in a univariate analysis and the adjusted relative risk using the logistic regression procedure. A score system was constructed on the basis of the sum of the excess risk of each index.

  18. Atividades de quitinase e beta-1,3-glucanase após eliciação das defesas do tomateiro contra a mancha-bacteriana Chitinase and beta-1,3-glucanase activities after the elicitation of tomato defenses against bacterial spot

    Directory of Open Access Journals (Sweden)

    Fábio Rossi Cavalcanti

    2006-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a influência de eliciadores biológicos e químicos sobre as atividades de duas proteínas relacionadas à patogênese (PR, quitinase e beta-1,3-glucanase, em folhas de tomateiro, e avaliar o potencial desses eliciadores na redução do progresso da mancha-foliar causada por Xanthomonas campestris pv. vesicatoria. Plantas de tomateiro da cultivar Santa Cruz Kada foram pulverizadas com: acibenzolar-S-metil (ASM; 0,2 g L-1; formulação biológica proveniente de biomassa cítrica, denominada Ecolife (5 mL L-1; suspensão de quitosana (MCp; 200 g L-1, proveniente de micélio de Crinipellis perniciosa; extrato aquoso de ramos de lobeira (Solanum lycocarpum infectados por C. perniciosa (VLA; 300 g L-1. As plantas foram desafiadas com um isolado virulento da bactéria, quatro dias depois das pulverizações. Plantas pulverizadas com extratos biológicos mostraram redução da mancha-bacteriana. ASM proporcionou 49,3% de proteção, e foi igual à MCp e Ecolife e superior ao VLA. Este último não diferiu significativamente de MCp e Ecolife. Observou-se maior atividade das duas enzimas nas plantas tratadas, principalmente nas primeiras horas após as pulverizações.The objective of this work was to assess the influence of foliar application of resistance inducers and the activation of plant pathogenesis-related (PR proteins, chitinases and beta-1,3-glucanases, against Xanthomonas campestris pv. vesicatoria, and evaluate the potential of these elicitors on the reduction of bacterial leaf spot. Tomato plants of the cultivar Santa Cruz Kada were sprayed with: acibenzolar-S-methyl (0.2 g L-1 ASM; Ecolife, a biological formulation based on citric biomass (5 mL L-1; chitosan suspension from Crinipellis perniciosa mycelium (MCp; 200 g L-1; an aqueous extract from branches of lobeira (Solanum lycocarpum infected with C. perniciosa (VLA; 300 g L-1. Plants were challenged with a virulent bacterial strain four days after spraying. Plants sprayed with the tested substances showed reduction of bacterial spot. ASM provided 49.3% protection, and was equal to MCp and Ecolife, and superior to VLA. VLA treatment did not differ statistically from MCp and Ecolife. Increases of beta-1,3-glucanase and chitinase activities were observed in treated plants at the first hour after spraying.

  19. Quantitative control of Lettuce mosaic virus fitness and host defence inhibition by P1-HCPro P1-HC Pro do Lettuce mosaic virus atua de forma quantitativa na inibição da resposta de defesa do hospedeiro e adaptação viral

    Directory of Open Access Journals (Sweden)

    Renate Krause-Sakate

    2007-06-01

    Full Text Available Two Lettuce mosaic virus isolates capable of overcoming the resistance afforded by the resistance gene mo1² in lettuce, LMV-AF199 from Brazil, and LMV-E, an European isolate, were evaluated for the rapidity and severity of symptoms induced on the lettuce variety Salinas 88 (mo1². The mosaic symptoms on Salinas 88 plants inoculated with LMV-AF199 appeared 7 days post-inoculation (dpi and 15 dpi for LMV-E. The symptoms induced by LMV-AF199 in this cultivar were also more severe than those induced by LMV-E. In order to identify the region of the viral genome responsible for this phenotype, recombinant viruses were constructed between these isolates and the phenotype of each recombinant was analysed. The region encoding proteins P1 and HcPro from LMV-AF199 was associated with the increased virulence in Salinas 88.Dois isolados de Lettuce mosaic virus capazes de contornar a resistência conferida pelo gene mo1² em alface, LMV-AF199 proveniente do Brasil e LMV-E um isolado europeu, foram avaliados quanto à rapidez e à severidade dos sintomas induzidos em alface variedade Salinas 88 (mo1². Os sintomas de mosaico induzidos pelo isolado LMV-AF-199 em Salinas 88 são mais severos e aparecem aos 7 dias após a inoculação (dpi, enquanto que para o isolado LMV-E os sintomas são visíveis somente a partir dos 15 dpi. Com o intuito de identificar a região do genoma viral responsável por este fenótipo, vírus recombinantes foram construídos entre estes dois isolados, e o fenótipo avaliado quanto a rapidez e severidade dos sintomas em Salinas-88. A região codificadora para as proteínas P1 e Hc-Pro do LMV-AF199 foi associada com o aumento da virulência deste isolado em Salinas-88.

  20. Baixas doses de melatonina exógena no diabetes experimental : implicações para a estrutura, função e defesa antioxidante do testículo e epidídimo de ratos = Low doses of exogen melatonin under experimental diabetes: implications for rat testicular and epididimal structure, function and antioxidant defense

    OpenAIRE

    Carolina Frandsen Pereira da Costa

    2014-01-01

    Resumo: Existem inúmeras evidências de que o diabetes afeta a função reprodutiva masculina, provocando danos aos parâmetros espermáticos, e portanto, influenciando a fertilidade dos indivíduos afetados. A melatonina é um hormônio secretado pela glândula pineal que apresenta uma extensa gama de atuações, dentre elas um papel fundamental no controle da esteroidogênese e na proteção contra radicais livres. O objetivo deste estudo foi avaliar se a melatonina oferecida oralmente, em baixas doses, ...

  1. Classification of areas considering equivalent doses due to radon, indoors in the Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN); Classificação de áreas considerando as doses equivalentes devido a radônio, em ambientes fechados no Instituto de Defesa Química, Biológica, Radiológica e Nuclear (IDQBRN)

    Energy Technology Data Exchange (ETDEWEB)

    Arbach, Mayara N.; Soares, Alexandre B., E-mail: mayaraarbach@gmail.com, E-mail: alexandrebaso@globo.com [Instituto de Radioproteção e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Alves, Rex N.; Cardoso, Domingos D’ O.; Júnior, Walter José. G., E-mail: rexnazare@ime.eb.br, E-mail: domin@ime.eb.br, E-mail: walter_guimaraes@ime.eb.br [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil)

    2017-07-01

    The human being is subject to several sources of natural radiation, mainly radon, belonging to the radioactive decay chain of uranium and thorium. At the study site, approximately 3.3 tons of uranium with natural concentration are stored. This fact, which generated the concern about the occupational dose levels of the IOE's of the facility, because its effective dose will have the increase due to the equivalent dose from the exposure to radon. The measurements took place: in the uranium deposit; in an adjoining room and at the control point. According to the norm CNEN - NN 3.01 and considering the existing radon concentrations in the three environments it was concluded that: the uranium deposit room is considered a controlled area; the control point a free area and the contiguous room, a supervised area.

  2. Alívio e tensão: um estudo sobre a interpretação e a aplicação da Lei Maria da Penha nas Delegacias de Defesa da Mulher e Distritos Policiais da Seccional de Polícia de Santo André - São Paulo

    OpenAIRE

    Marilda de Oliveira Lemos

    2010-01-01

    A violência contra a mulher constitui uma violação dos direitos humanos e das liberdades fundamentais. Em 2006, o governo brasileiro aprovou a Lei 11.340 Lei Maria da Penha - que coíbe a violência doméstica e familiar contra a mulher. Apesar do esforço que vem sendo feito por órgãos governamentais e não governamentais, a implantação da Lei Maria da Penha tem encontrado resistências. Alguns representantes do Poder Judiciário advogam a inconstitucionalidade da Lei. A interpretação e aplicabili...

  3. Carlos María Ramírez sai em defesa de José Artigas: da crítica à (reconstrução do herói oriental = Carlos María Ramírez defends José Artigas: from criticism to the eastern hero reconstruction

    Directory of Open Access Journals (Sweden)

    Fuão, Juarez J. Rodrigues

    2009-01-01

    Full Text Available O artigo analisa a obra Juicio Crítico del Bosquejo Histórico de la República Oriental del Uruguay por el Dr. D. Francisco A. Berra, escrita por Carlos María Ramírez, e o papel do intelectual na construção idealizada de José Artigas. Publicada no ano de 1882, período marcado pelo intenso debate acerca do passado uruguaio, tal obra participou do processo de reabilitação da imagem do líder independentista, caracterizando-o como o grande libertador e o Precursor da Nacionalidade Uruguaia

  4. A relação entre os mecanismos de defesa e a qualidade da aliança terapêutica em psicoterapia de orientação analítica The relationship between defense mechanisms and the quality of therapeutic alliance in analytic psychotherapy

    Directory of Open Access Journals (Sweden)

    Fernando Grilo Gomes

    2008-08-01

    Full Text Available INTRODUÇÃO: O estabelecimento de uma aliança terapêutica de boa qualidade em uma psicoterapia psicanalítica é fundamental para o processo terapêutico. Este estudo avaliou a influência do nível de funcionamento defensivo do paciente na qualidade da aliança terapêutica estabelecida durante a psicoterapia. MÉTODO: Para avaliação da qualidade da aliança estabelecida, pacientes em psicoterapia psicanalítica e seus respectivos terapeutas responderam ao Helping Alliance Questionnaire (versão paciente e versão terapeuta, respectivamente. O nível defensivo foi inferido através da Escala de Funcionamento Defensivo proposta no Manual de Diagnóstico e Estatística das Perturbações Mentais, quarta edição, texto revisado. RESULTADOS: Não houve associação entre o estabelecimento de uma aliança terapêutica de boa qualidade e o nível defensivo do paciente. No entanto, houve diferença significativa quando a versão do terapeuta foi comparada com a respondida pelo paciente: os pacientes estabeleceram uma aliança terapêutica de melhor qualidade em relação a seus terapeutas do que o inverso. CONCLUSÕES: O fato de a aliança terapêutica de boa qualidade ter se estabelecido independentemente do nível defensivo do paciente sugere que o treinamento e as características pessoais do terapeuta podem levar a uma capacidade de conectar-se com o paciente, apesar do grau de comprometimento do seu funcionamento psíquico.BACKGROUND: The quality of a therapeutic alliance is essential in psychoanalytic psychotherapy and influences the therapeutic process. This study evaluated the relationship between the level of defense mechanisms and the quality of therapeutic alliance established during psychotherapy. METHOD: Patients in psychotherapy and their respective therapists completed the Helping Alliance Questionnaire (patient version and therapist version, respectively. The level of defenses was inferred by the Defensive Functioning Scale proposed in the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision. RESULTS: There was no association between the quality of therapeutic alliance and the patient's level of defense mechanisms in this sample. On the other hand, there was a difference when the therapist version was compared to the patient version: patients established a stronger therapeutic alliance in relation to their therapists. CONCLUSIONS: The lack of influence of defense level in the quality of therapeutic alliance suggests that the therapist's training and personal characteristics may lead to the ability of connecting with the patient, despite impairment in their psychic functioning.

  5. 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)

  6. Biomimetic polymers in analytical chemistry. Part 1: preparation and applications of MIP (Molecularly Imprinted Polymers) in extraction and separation techniques; Polimeros biomimeticos em quimica analitica. Parte 1: preparo e aplicacoes de MIP ('Molecularly Imprinted Polymers') em tecnicas de extracao e separacao

    Energy Technology Data Exchange (ETDEWEB)

    Tarley, Cesar Ricardo Teixeira; Sotomayor, Maria del Pilar Taboada; Kubota, Lauro Tatsuo [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica. Dept. de Quimica Analitica]. E-mail: kubota@iqm.unicamp.br

    2005-11-15

    MIPs are synthetic polymers that are used as biomimetic materials simulating the mechanism verified in natural entities such as antibodies and enzymes. Although MIPs have been successfully used as an outstanding tool for enhancing the selectivity or different analytical approaches, such as separation science and electrochemical and optical sensors, several parameters must be optimized during their synthesis. Therefore, the state-of-the-art of MIP production as well as the different polymerization methods are discussed. The potential selectivity of MIPs in the extraction and separation techniques focusing mainly on environmental, clinical and pharmaceutical samples as applications for analytical purposes is presented. (author)

  7. Microbiological, physicochemical and sensory evaluation of cabbage and carrot minimally processed salad after radiation treatment intended to immunocompromised patients or with special diets; Avaliacao microbiologica, fisico-quimica e sensorial de salada de repolho com cenoura minimamente processada apos o tratamento por radiacao gama destinado a pacientes imunocomprometidos ou com dietas especiais

    Energy Technology Data Exchange (ETDEWEB)

    Nunes, Thaise Cristine Fernandes

    2015-09-01

    During and after the treatment of cancer, people with HIV or transplants, the food intake can offer a well-being to the patient, because the action of eating right helps people to feel strong. Healthy people have their immune system working properly and can tolerate small amounts of bacteria. However, immunocompromised persons may not be able to and however immunocompromised people cannot fight this small amount of microorganisms and require a diet with very low microbiological count to avoid contact with potentially harmful bacteria. This is called neutropenic diet. These patients are susceptible to food contamination, so that it's not advisable the ingestion of raw products. The vegetable irradiation with low doses has the purpose of reducing the microbial load. The aim of this study was to obtain data on microbiological, sensorial e physicochemical aspects in minimally processed 'Primavera' salad irradiated with different doses of gamma radiation designed to immunocompromised patients. It were used doses of 1.0kGy, 2.0kGy, 3.0kGy and 4.0kGy irradiated in the Multipurpose Irradiator {sup 60}Co located in Radiation Technology Center. Microbiological analyzes were performed (n=25) using Petrifilm, sensory analysis using the sensory acceptance test (n=30) and triangular (n=15) and texture analysis (n=90) in the Food Microbiology Laboratory located at the Radiation Technology Center. The texture analysis was performed with the aid of a texturometer equipped with 5 kg load cell using a triangular cutting Warner-Bratzler Knife blade probe with the descent speed of 2mm/sec. All results were expressed in Newtons (N). The results showed that for microbiological analyzes the standards were followed according to the RDC 12/01 ANVISA. For the sensory test of acceptation no difference was found among the samples, however in the triangular test could be found slight differences between samples irradiated with 4.0kGy and control and there was significant difference among the sample, showing that the sample of 3.0kGy would be indicate for this specific public. It can be concluded that for a neutropenic diet the suggested dose is 2.0kGy. (author)

  8. Chemical species of europium (III) in ionic force media 0.02M, 0.1M, and 0.7M NaClO{sub 4} at 298 K; Especies quimicas del europio (III) en medios de fuerza ionica 0.02M, 0.1M y 0.7M NaClO{sub 4} a 298 K

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez R, E.; Jimenez R, M.; Solache R, M. [Instituto Nacional de Investigaciones Nucleares, Departamento de Quimica, A.P. 18-1027, C.P. 11801 Mexico D.F. (Mexico)

    2000-07-01

    In order to know the effects of the controlled or accidental liberation of the europium in the environment, it is necessary to know its chemical behavior in found conditions in oceans, ground and surface water. The behavior of this element in these environments can be controlled mainly by the hydrolysis and its interaction with inorganic and organic ions. (Author)

  9. Spectrographic determination of boron and silicon in uranium tetrafluoride: Study of the chemical reactions in the electrode cavity when ZnO is used as a uranium excitation suppressor; Determinacion espectrografica de Boro y Silicio en Tetrafluoruro de Unraio: Estudio de las reacciones quimicas que tienen lugar en el crater del electrodo al autilizar ZnO como supresor de la excitacion del Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Alduan, F. A.; Capdevila, C.; Rosa, M.

    1973-07-01

    A method has been developed for determining traces of boron and silicon in uranium tetrafluoride. Use is made of zinc oxide to decrease the volatilization of uranium and achieve high sensitivities. The thermochemical reactions which occur in the anode cavity during the arcing process have been investigated. UO{sub 2} and a uranium, zinc and fluorine compound, both less volatile than uranium tetrafluoride, are formed. (Author)

  10. Evaluation of the ionizing radiation {sup 60}Co effect on the physical, chemical and nutritional properties of different cultivars of soybean grains (Glycine max (L.));Avaliacao dos efeitos da radiacao ionizante de {sup 60}Co em propriedades fisicas, quimicas e nutricionais de diferentes cultivares de graos de soja Glycine max (L.)

    Energy Technology Data Exchange (ETDEWEB)

    Toledo, Tais Carolina Franqueira de

    2006-07-01

    With the increase of the world population, creative strategies will be necessary to control food production. To achieve this challenge, new cultivars have been development, though different techniques and characteristics. To improve food conservation, a plant of methods can be used. The use of Cobalto-60 radiation is a secure and useful method to increase the life time of foods. Due to the commercial and nutritional importance of soybean, some alterations must be studied. This study has the objective to determinate this alterations caused by irradiation (with doses of 2, 4 and 8 kGy) in raw and cooked grain of five different cultivars of soybean (BRS 212, BRS 213, BRS 214, 231 BRS and E48), this study includes analysis of time cooking and hydratation, and chemical analysis of proximate composition, in vitro digestibility of proteins, percentage of deamidation , phenolics compounds, trypsin inhibitors and tannins. The amount of water absorbed by each grain varied from 14.00 to 16.66mL, and the time cooking varied from 119.67 to 291.33 minutes. The values found for ash were 4.90 to 6.08%, for protein from 21.23 to 36.99%, for fat from 19.22 to 24.84%, soluble staple fibres from 1.37 to 4.03% and insoluble staple fibres from 15.97 to 18.87%. The deamidation percentage in the different samples varied of 17,34 to 57.79% and the digestibility in vitro from 84.45 to 89.11%. Inside of the anti nutritional factors, the total compounds phenolics varied from 3.9 to 9.7 mg/g, the units of trypsin inhibited from 24.75 to 57.53 UTI/g and the tannins from 0.02 to 0.32 mg/g. For the physical analyses it showed differences in the time of hydratation among them and the irradiation promoted reduction in the time, but not in the amount of absorbed water; in the cooking time it had reduction with the increase of the doses of radiation; the differences found in the proximate composition did not have influence with the irradiation, but with the different cultivars; for the digestibility alterations only with the cooking treatment had been found, showing an increase after the baking; the treatment of irradiation promoted a higher percentage of deamidation of the samples with the increase of the doses; regard to the anti nutritional factors, all them had a reduction as the doses radiation increased. The cooking also promoted a reduction in the anti nutritional factors in the raw and baked samples. So the treatment of irradiation did not promote reduction in the nutritional qualities of the soybean grains, being effective in the improvement of them with the reduction in the anti nutrient factors. (author)

  11. Caracterização físico-quimica de farinhas oriundas de variedades de mandioca utilizadas no vale do Juruá, Acre Physicochemical characteristics of flours deriving of cassava varieties used in the Vale do Juruá, Acre

    Directory of Open Access Journals (Sweden)

    Joana Maria Leite de Souza

    2008-12-01

    Full Text Available Algumas características de farinha de mandioca dependem da variedade da raiz utilizada para o processamento. Objetivou-se avaliar as características físico-químicas da farinha de mandioca oriundas de variedades utilizadas no estado do Acre. Os tratamentos foram compostos pelas variedades: T1= Paxiubão, T2= Im221, T3 = Caboquinha, T4 = Araçá, T5 = Colonial, T6 = Branquinha, T7 = Panati e T8 = Mansa e Brava. Foram coletadas amostras das oito variedades de mandioca em casas-de-farinha no município de Cruzeiro do Sul, Acre. As raízes foram transportadas via aérea para o Laboratório de Tecnologia de Alimentos da Embrapa-AC, na cidade de Rio Branco, Acre. Foram avaliados: teor de umidade, cinzas, lipídios, proteína, fibra bruta, carboidratos, acidez, pH e atividade de água. Todas as amostras se apresentaram de acordo com os padrões estabelecidos pela Legislação Brasileira para farinha de mandioca quanto ao teor de umidade, cinzas e carboidratos. As farinhas analisadas apresentam teores baixos de fibras e baixa acidez. A atividade de água das farinhas analisadas esteve abaixo do limite mínimo capaz de permitir o desenvolvimento de microrganismos. As variedades Araçá, Colonial e Branquinha se mostraram adequadas para a fabricação de farinha de mandioca devido, principalmente, ao elevado teor de proteína e carboidratos presente nas farinhas produzidas.Some characteristics of the cassava depend on the variety used for the processing. The objectified of this study was to evaluate physicochemical characteristics of the cassava flour from varieties used in Acre. The treatments were composed by the varieties: T1 = Paxiubão, T2 = Im221, T3 = Caboquinha, T4 = Araçá, T5 = Colonial, T6 = Branquinha, T7 = Panati and T8 = Mansa e Brava. Samples of flour of eight cassava varieties were collect in cassava mils in Cruzeiro do Sul. The samples were sent by airmail to Rio Branco, Acre, to be analyzed in the Food and Technology Laboratory at Embrapa-AC. The evaluated parameters were: water percentage, ashes, lipids, protein, fiber, carbohydrates, acidity, pH and water activity. All samples were taken according to the established patterns of the Brazilian Legislation for cassava flour, considering water percentage, ashes and carbohydrates. The analyzed flours presented low fibers levels and low acidity. The water activity of the analyzed flours was below the minimum limit necessary to allow microorganisms development. The varieties Araçá, Colonial and Branquinha were adequate to cassava flour manufacturing, mainly because of the high protein and carbohydrates levels present in the produced flour.

  12. "Sustancia" en el devenir la quimica: dime cómo te buscan y te diré que eres "Substance" in the evolution of chemistry: tell me how the other is looking for you and I will tell you what you are

    Directory of Open Access Journals (Sweden)

    Berta Lucila Henao

    2009-01-01

    Full Text Available Con base en planteamientos de Stephen Toulmin se presentan algunos aspectos del devenir histórico de la Química, en relación con el concepto sustancia. En un recorrido somero y no lineal, el texto intenta mostrar algunas complejas redes que se tejen entre los diversos componentes de lo que Toulmin denomina "ecología intelectual"; así como los nichos de la racionalidad y la representación, en las dinámicas de la misma. Esta aproximación al devenir del concepto, permite identificar preguntas y problemas que, con diferentes significados, énfasis y matices, aún están vigentes; modelos explicativos con los que se ha pretendido dar respuesta a dichas cuestiones y algunas formas de validación que permiten la aceptación contextual de los mismos. Finalmente, proponemos posibles implicaciones de estos análisis para la enseñanza.Taking into account Stephen Toulmin´s approaches, we will look at some aspects in the historical development of Chemistry connected to the concept of substance. In a superficial and non-linear manner, the text tries to show some complex networks that developed between the diverse components named by Toulmin as "intellectual ecology", such as the niches of rationality and the representations among them. This aproximation to the outcoming allows to identify the questions and the problems which with different meanings, emphasis and shades are still current; explanatory models which have pretended giving an answer to those questions and some forms of validity which permit the contextual acceptance of them. Finally, we propose possible implications of these analysis to teaching.

  13. Effect of addition of lignin in physical-chemical properties of a polyesters based on glycerol, phthalic and adipic acids; Efeito da adicao de lignina nas propriedades fisico-quimicas de poliesteres a base de glicerol e acidos ftalico e adipico

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, D.H.; Viana, A.P.M.; Lima, A.S.C.; Goncalves, A.P.B.; Miranda, C.S.; Jose, N.M., E-mail: dhanseng@yahoo.com.br [Universidade Federal da Bahia (UFBA), alvador, BA (Brazil)

    2014-07-01

    In this paper the study of different addition amounts of lignin in the physicochemical properties of polyesters made from glycerol and different amounts of phthalic and adipic acids have been proposed. The following characterizations were made: XRD, FTIR, TGA, DSC and SEM. The variation in the percentage of adipic and phthalic acids had a direct effect on thermal and morphological properties. The thermal analysis showed that there was miscibility between the polyester and lignin, by means of displacement related to the temperature of thermal degradation events. In FTIR analysis was noted displacements of characteristic bands of hydrogen bonds and specific carbonyl ester groups. These shifts were more pronounced as it has larger amounts of phthalic acid as monomer and larger amounts of lignin in the compositions. (author)

  14. Ionizing radiation effects of Cobalt-60 on the physical-chemical, sensorial and microbiological of bread with addition of linseed (Linum usitatissimum); Efeitos da radiacao ionizante de cobalto-60 nas caracteristicas fisico-quimicas sensoriais e microbiolgicas de paes com adicao de linhaca (Linum usitatissimum)

    Energy Technology Data Exchange (ETDEWEB)

    Moura, Neila Camargo de

    2011-07-01

    The incorporation of functional ingredients on breading products has grown very much lately, because of the preoccupation with the consumers' health. The linseed has awakened the interest by its high level of fiber, lignin, omega-3 and antioxidants compounds. The objective of the present work is evaluate the ionizing radiation effect of {sup 60}Co on the physical-chemical, sensorial and microbiological characteristics of bread with addition of different concentration of brown linseed. There were elaborated 3 types of bread: French roll, form bread prepared with the mixture and form bread produced with conventional ingredients. It was added smashed brown linseed on the bread dough, with concentrations of 8% and 12%. After the preparation, the three kinds of bread packed with polypropylene packages and taken to the IPEN/USP (Institute of Nuclear Energetic Research/University of São Paulo) and irradiated with doses of 6, 8 and 10 kGy. Treatments were elaborated without the addition of linseed and without irradiation, for control, totalizing 12 distinct treatments, to each bread formula tested. Chemical analyses were made (centesimal composition, anti-nutritional compounds, anti-oxidant activity, glycemic index, fat acids, complex B vitamins and minerals); physical analyses (cooking index, volume, color and water activity); sensorial analyses (preference tests and Descriptive Quantitative Analysis - ADQ); microbiological analysis and a survey about irradiated products. It could be seen that the addition of linseed was efficient to increase the level of alimentary fiber and the level of lipids on the 3 bread formula. The three kinds of bread that received the linseed addition and that were not irradiated presented increase on the level of total phenolic; however, when the samples which received the linseed addition were submitted to the irradiation process, it could be noticed the decrease of the antioxidant capacity. There was an increase on the level of omega-3, depending on the percentage of linseed added to the bread. The linseed addition was effective to raise the level of potassium, phosphorus and magnesium. But, the irradiation decrease the level of vitamin B1 and vitamin B6 of the three kinds of bread. The irradiation did not influence the quality of the obtained bread. The sample tasters, not trained, accepted the bread independently of the doses of applied radiation. The ADQ test evidenced that the sensorial characteristics of the samples depend on the ingredient variation used on the formulas and on the radiation. The irradiated samples presented mold counting considerably lower than the non-irradiated samples, which increased the shelf-life of those products. The survey reveals that the majority of the people interviewed has little or any knowledge about radiation and believe that the irradiation can generate some kind of harm for human beings. Therefore, the bread production enriched with mashed linseed and submitted to gamma radiation is promising, given that the chemical and sensorial properties were considered satisfactory, besides the increasing of the shelf-time. (author)

  15. Chemical recycling of post-consumer PET: structural characterization of terephthalic acid and the effect of Alkaline Hydrolysis at low temperature; Reciclagem quimica do PET pos-consumo: caracterizacao estrutural do acido tereftalico e efeito da hidrolise alcalina em baixa temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Fonseca, Talitha Granja; Almeida, Yeda Medeiros Bastos de; Vinhas, Gloria Maria, E-mail: gmvinhas@yahoo.com.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Engenharia Quimica

    2014-09-15

    Due to the environmental impact caused by PET packaging disposal, this material recycling has been thoroughly discussed and evaluated. In particular, chemical recycling enables achievement of the monomers that are used in PET resin manufacture: ethylene glycol (EG) and terephthalic acid (PTA). Therefore, studies for this process optimization are important from environmental and economic points of view. The present study investigated certain parameters that influence the depolymerization reaction of PET post-consumer via alkaline hydrolysis in order to obtain PTA. Assays were performed at 70 °C by varying the concentration of sodium hydroxide and the reaction time. The best results were obtained at 10.82 mol L{sup -1} NaOH and 9 h reaction time. Consequently, it was possible to prove this process viability, once analyses by infrared and nuclear magnetic resonance confirmed that PTA was obtained in all reactions performed. (author)

  16. Preparation and characterization of phase-pure anatase and rutile TiO{sub 2} powder by new chemistry route; Preparacao e caracterizacao de nanoparticulas de TiO{sub 2} nas fases anatase e rutila por uma nova rota quimica

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, E. A.; Montanhera, M.A.; Paula, F.R., E-mail: sevlarede2@yahoo.com.br [Universidade Estadual Paulista Julio de Mesquista Filho (UNESP), Ilha Soltiera, SP (Brazil). Faculdade de Engenharia. Departameinto de Fisica e Quimica; Spada, E.R. [Universidade de Sao Paulo (USP), Sao Carlos, SP (Brazil). Institutlo de Fisica

    2014-07-01

    Titanium dioxide (TiO{sub 2}) is used in a wire range applications such as photocatalysis and sensor device. In this work is shown a new and effective method for the preparation of TiO{sub 2} nanocrystalline in the crystallographic forms, anatase and rutile. The method involves dissolving the TiOSO{sub 4} powder in H{sub 2}O{sub 2} solution and thermal treatment of amorphous precipitate. The technique of X-ray diffraction was used to follow the structure evolution of amorphous precipitate. Pure anatase structure and rutile are obtained at 600 deg C and 1000 deg C with a grain size estimated 24 and 55 nm respectively. TiO{sub 2} nanoparticles is a promising alternative of the low cost whose potential for solar cells deserve a careful evaluation, especially in hybrid solar cells that employs TiO{sub 2} as electron acceptor and as transport channels. (author)

  17. Measurement of the mass of mercury in electrolytic cells of Chemical Industry of the Istmo s. a. of c. v. Coatzacoalcos Plant, Ver. (Mexico); Determinacion de la masa de mercurio en celdas electroliticas de Industria Quimica del Istmo s. a. de c. v. Planta Coatzacoalcos, Ver

    Energy Technology Data Exchange (ETDEWEB)

    Angeles C, A.; Vizuet G, J.; Herrera M, J. M.; Flores M, J

    2001-01-15

    For the industry of the production of caustic soda and chlorine is commonly use electrolytic cells with mobile electrode of mercury; in the process it gets lost mass, and there is necessity to know the quantity of mercury that exists in each cell. To know the periodic levels of mercury in the 40 electrolytic cells of the Plant of Coatzacoalcos, in the State of Veracruz (Mexico), the investigators of the ININ used the technique of isotopic dilution by mean of the radioactive injection of a radioactive tracer.(Author)

  18. Effects of gamma radiation ({sup 60}Co) on the main physical and chemical properties of health care packaging and their compounds paper and multilayer plastic film, used for health products sterilization; Efeitos da radiacao gama (Cobalto-60) nas principais propriedades fisicas e quimicas da embalagens compostas por papel grau cirurgico e filme plastico laminado, destinadas a esterilizacao de produtos para saude

    Energy Technology Data Exchange (ETDEWEB)

    Porto, Karina Meschini Batista Geribello

    2013-07-01

    Gamma radiation is one of the technologies applied for the sterilization of packaging systems containing products for health. During sterilization process it is critical that the properties of packages are maintained. In this study two samples of commercial pouch packaging comprised of surgical grade paper on one side and the other side multilayer plastic film were irradiated with gamma rays. The following doses were applied 25 kGy (1,57 kGy/h) and 50 kGy (1,48 kGy/h). One packaging sample was paper formed by softwood fibers and multilayer plastic film based on poly(ethylene terephthalate) (PET)/polyethylene (PE). The second type of paper sample was made by a mixture of softwood and hardwood fibers and multilayer plastic film based on polyethylene terephthalate (ethylene) (PET)/polypropylene (PP). The effects of radiation on the physical and chemical properties of papers and multilayer plastic films, as well as the properties of the package were studied. The paper was the more radiation sensitive among the studied materials and radiation effects were more pronounced at brightness, pH, tearing resistance, bursting strength and tensile strength. Nonetheless, worst comparatively effects were noted on the sample made by a mixture of softwood and hardwood fibers. The porosity of paper was enhanced by 50 kGy. In the case of plastic films, radiation effects on tensile strength was the most pronounced property for both samples. In the case of the packaging the sealing resistance decreased with radiation. The effects observed for the treatment at 50 kGy were more pronounced when compared to 25 kGy. This last is the dose which is usually applied to sterilize health products. A dosimetry study was performed during irradiation at 25 kGy, 40 kGy and 50 kGy and its importance may be reported by the average dose variation 20 %. (author)

  19. Verification of the correlation between the {sup 210} Pb and the chemical composition of the incrustations found on gas pipelines and the implication on radiological protection; Verificacao da correlacao entre a atividade de {sup 210}Pb e a composicao quimica de incrustacoes encontradas em linhas de gas e a implicacao em protecao radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Franciane Martins de Carvalho

    2004-07-01

    In the last decades, the occurrence of solid residual deposits, known as black powder, in natural-gas pipelines, gathering systems and compression equipment from gas industries has raised increasing regulatory concerns in terms of radiological protection. Concerns are also raised about the waste disposal and management of the radioactive residues eventually produced. Recent projections indicate a significant increase in the production of natural-gas and its products, due to a growing commercial demand, which leads to the production of huge amounts of residues. Thus, more information is needed in order to allow a preliminary evaluation of the radiological profile of this type of industry. In black powder residues, the most prevalent radioisotope is {sup 210}Pb. The present work aimed to investigate the correlation between the chemical composition of the residue and the concentration of {sup 210}Pb, in black powder samples collected at Bacia de Campos, in the State of Rio de Janeiro, Brazil. The main objective was to generate information to regulatory authorities, to the National Commission of Nuclear Energy (CNEN) and to companies that produce natural-gas, such as PETROBRAS. Based on the information, the gas producing companies could elaborate radiological protection guidelines, and also decide about the need for implementation of a waste management program at the installation. The samples of black powder analyzed at the present work have confirmed the existence of such correlation between the concentration of {sup 210}Pb and chemical parameters. In principle, the present results make the use of such correlation feasible for preliminary evaluations of the {sup 210}Pb levels in natural-gas installations. On the other hand, given the geographic limitations, a broader study is recommended, in order to evaluate the investigated correlation, which could be used as a guiding tool for the Brazilian industry of production and processing of natural-gas.(author)

  20. Recent Developments in the Chemical Thermodynamics of the Uranium Chalcogenides; Progres Accomplis Recemment dans la Thermodynamique Chimique des Chalcogenures d'Uranium; Poslednie dostizheniya v khimicheskoj termodinamike khal'kogenidov Urana; Recientes Progresos en la Termodinamica Quimica de los Calcogenidos de Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Westrum, Jr., E. F. [University of Michigan, Ann Arbor, MI (United States)

    1966-02-15

    Extension of the cryothermal data on tetrauranium enneaoxide to higher temperatures has revealed the thermophysical aspects of the (suspected) gradual, {lambda}-type, structural transition at 348 Degree-Sign K with an associated entropy increment of 1.84 cal/gfm Degree-Sign K involved in the displacement of interstitial oxygen atoms. Measurements of both heat capacity and magnetic susceptibility on Mallinckrodt sintered uranium dioxide have confirmed that the antiferromagnetic-paramagnetic transition occurs at 30.4 Degree-Sign K with a heat capacity of 400 cal/gfm Degree-Sign K rather than at 28.7 Degree-Sign K with 9 cal/gfm Degree-Sign K as reported in the literature. This now permits interpretation of the thermal anomaly found in {beta}-triuranium heptaoxide. Cryogenic heat capacities on well-characterized samples of {alpha}-, {beta}- and {gamma}-uranium trioxide prepared by Dr. E.H.P. Cordfunke of Reactor Centrum Nederland are combined with his higher temperature heat capacities, enthalpies of formation and other thermodynamic data to yield relative stability data for these important nuclear materials. Both uranium monoselenide and Uranium diselenide are found to have lambda-type anomalies associated with magnetic disordering. That in uranium diselenide occurs at 13.1 Degree-Sign K with an associated entropy increment of 0.16 cal/gfm Degree-Sign K. The 160 Degree-Sign K anomaly in the monoselenide has an entropy increment of 1.0 cal/gfm Degree-Sign K, which may be compared with the value of 1.17 found for the monosulfide near 180 Degree-Sign K. Both thermal anomalies in the monochalcogenides arise as a consequence of disordering the ferromagnetic state and contrast with the antiferromagnetic anomaly found in the isostructural mononitride at 52 Degree-Sign K. The new thermodynamic data accord well with the entropy estimation scheme of Gronvold and Westrum. (author) [French] L'extension de la temperature plus elevee des valeurs aux basses temperatures des constantes relatives au nonaoxyde de tetrauranium a revele les aspects thermophysiques de la transition structurale de ' type {lambda} supposee progressive a 348 Degree-Sign K avec accroissement d'entropie associe de 1,84 cal/gfm Degree-Sign K, qui intervient dans le deplacement d'atomes d'oxygene interstitiels. Des mesures de la capacite calorifique et de la susceptibilite magnetique sur du bioxyde d'uranium fritte de Mallincktodt ont confirme que la transition antiferromagnetique-paramagnetique se produit a 30,4 Degree-Sign K avec 400 cal/gfm Degree-Sign K pour la capacite calorifique et non a 28,7 Degree-Sign K avec une saute de 9 cal/gfm Degree-Sign K comme il est dit dans d'autres ouvrages. On peut ainsi interpreter l'anomalie thermique trouvee dans l'heptaoxyde de triuianium beta. L'auteur a combine les capacites calorifiques, aux basses temperatures, d'echantillons bien caracterises de trioxyde d'uranium alpha, beta et gamma prepares par E. Cordfunke du Reactor Centrum Nederland avec les valeurs des capacites calorifiques, des enthalpies de formation et d'autres constantes thermodynamiques pour en tirer les valeurs de la stabilite relative pour ces importants materiaux nucleaires. Il a constate que le mohoseleniure et le biseleniure d'uranium presentaient tous deux des anomalies du type lambda associees a un desordre magnetique. Cette anomalie se produit a 13,1 Degree-Sign K dans le biseleniure, avec un accroissement d'entropie associe de 0,16 cal/gfm Degree-Sign K. L'anomalie se produisant a 160 Degree-Sign K dans le monoseleniure est accompagnee d'un accroissement d'entropie de 1,0 cal/gfm Degree-Sign K, qui peut etre compare a la valeur 1,17 trouvee pour le monosulfure au voisinage de 180 Degree-Sign K. Les deux anomalies thermiques dans les monochalcogenures resultent d'un desordre de l'etat ferromagnetique et s'opposent b l'anomalie antiferromagnetique constatee dans le mononitrure isostructural a 52 Degree-Sign K. Les nouvelles valeurs des constantes thermodynamiques sont en bon accord avec le systeme d'estimation de l'entropie de Gronvold et Westrum. (author) [Spanish] La extension a temperaturas mas elevadas de los datos criotermicos correspondientes al U{sub 4}O{sub 11} ha puesto de manifiesto los aspectos termoffsicos de la transicion estructural gradual (sospechada) de tipo lambda a 348 Degree-Sign K, con un correspondiente aumento de entropia igual a 1,84 cal/gfm Degree-Sign K, vinculado al desplazamiento de atomos de oxigeno intersticiales. Las mediciones, de la capacidad calorifica y de la susceptibilidad magnetica, realizadas con UO{sub 2}'Mallinckrodt' sinterizado, confirmaron que la transicion antiferromagnetica-paramagnetica tiene lugar a 30,4 Degree-Sign K con una variacion de capacidad calorifica igual a 400 cal/gfm Degree-Sign K, en lugar de producirse a 28,7eK con una variacion de 9 cal/gfm eK, segun se informa en la literatura tecnica. Con ello se puede interpretar ahora la anomalia termica hallada en el U{sub 3}O{sub 7}-{beta}. La capacidad calorifica a bajas temperaturas de muestras bien caracterizadas de UO{sub 3}-{alpha}, UO{sub 3}-{beta} y UO{sub 3} -{gamma}, preparadas por el Dr. E.H.P. Cordfunke, del Reactor Centrum Nederland, se combina con estas capacidades calorificas a temperaturas mas elevadas, con las entalpias de formacion y con otros datos termodinamicos, para obtener datos de estabilidad relativa correspondientes a esos importantes materiales nucleares. Tanto el monoseleniuro como el diseleniuro de uranio poseen anomalias de tipo lambda vinculadas al desordenamiento magnetico. La del diseleniuro de uranio se produce a 13,1 Degree-Sign K, con un incremento de entropia igual a 0,16 cal/gfm Degree-Sign K. La anomalia de 160 Degree-Sign K tiene un incremento de entropia de 1,0 cal/gfm eK, que puede compararse con el valor 1,17 encontrado para el monosulfuro cerca de los 180 Degree-Sign K. Ambas anomalias termicas observadas en los monocalcogenidos surgen como consecuencia del desordenamiento del estado ferromagnetico y contrastan con la anomalia antiferro- magnetica hallada en el mononitruro isoestructural a 52 Degree-Sign K. Los nuevos datos termodinamicos concuerdan satisfactoriamente con los obtenidos mediante el procedimiento de evaluacion de entropia de Gronvold y Westrum. (author) [Russian] Rasprostranenie kriotermicheskih dannyh no U{sub 4}O{sub 9} na bolee vysokie temperatury pokazalo termofizicheskie aspekty (predpolagaemogo) postepennogo strukturnogo prevrashhenija tipa-A. pri temperature 348 Degree-Sign K s sootvetstvujushhim prirashheniem jentropii v razmere 1,84 kalorij/gramm-mol' OK, svjazannogo so smeshheniem vnedrennyh atomov kisloroda. Izmerenija kak teploemkosti, tak i magnitnoj vospriimchivosti na spechennoj dvuokisi urana Mol- linkrodta podtverdili, chto antiferromagnitnyj-paramagnitnyj perehod proishodit pri 30,4 Degree-Sign K so skachkom teploemkosti v 400 kalorij/gramm-mol' Degree-Sign K, a ne pri 28,7 Degree-Sign K s povysheniem teploemkosti na devjat' kalorij/gramm-mol' Degree-Sign K, kak soobshhalos' v literature. Jeto pozvoljaet teper' ob{sup j}asnit' termicheskuju anomaliju, obnaruzhennuju v {beta} -U{sub 3}O{sub 7}. Kriogennye teploemkosti, poluchennye na harakternyh obrazcah {alpha}-, {beta}-, i {gamma} utriokisi urana, podgotovlennyh doktorom E.G.P.Kordfunke iz Niderlandskogo reaktornogo centra, kombinirujutsja s teploemkostjami pri bolee vysokoj temperature, jental'pijami obrazovanija i drugimi termodinamicheskimi dannymi dlja poluchenija dannyh ob otnositel'noj stabil'nosti jetih vazhnyh jadernyh materialov. Obnaruzheno, chto kak monoselenid urana, tak i diselenid urana imejut anomalii tipa ljambda, svjazannye s magnitnym razuporjadocheniem. V diselenide urana jeto proishodit pri 13,1 Degree-Sign K s prirashheniem jentropii v 0,16 kalorij/gramm-mol' Degree-Sign K. Prirashhenie jentropii v monoselenide pri anomalii pri 160 Degree-Sign K sostavljaet velichinu 1,0 kalorij/gramm- mol' Degree-Sign K, chto mozhno sravnit' s velichinoj 1,17, poluchennoj dlja monosul'fida pri temperature okolo 180 Degree-Sign K. Obe termicheskie anomalii v monohal'kogenidah voznikajut vsledstvie razupo- rjadochenija ferromagnitnogo sostojanija i otlichajutsja ot antiferromagnitnoj anomalii, obnaruzhennoj v izostrukturnom mononitride pri temperature 52 Degree-Sign K. Novye termodinamicheskie dannye horosho soglasujutsja so shemoj ocenki jentropii Gronvold i Westrum. (author)

  1. Comparative study of smear layer removal by different etching modalities and Er:YAG laser irradiation on the root surface: a scanning electron microscopy study; Estudo comparativo, atraves de microscopia eletronica de varredura, da acao de diferentes substancias quimicas e do laser de Er:YAG, na remocao de smear layer, em superficies radiculares submetidas a raspagem e aplainamento

    Energy Technology Data Exchange (ETDEWEB)

    Theodoro, Leticia Helena

    2001-07-01

    The aim of this study was to compare the effects of citric acid, EDTA, citric acid with tetracycline, and Er:YAG laser to smear layer removal on the root surface after scaling with manual instruments by SEM. Thirty specimens (n=30) of root surface before scaling were divided into 6 groups (n=5). The Control Group (G1) was not treated; Group 2 (G2) was conditioned with citric acid gel 24%, pH1, during 2 minutes; Group 3 (G3) was conditioned with EDTA gel 24%, pH 7, during 2 minutes; Group 4 (G4) was conditioned with citric acid and tetracycline gel 50%, pH1 during 2 minutes; Group 5 (G5) was irradiated with Er:YAG laser (2.94 {mu}m), 47 mJ/10 Hz, focused, under water spray during 15 seconds and fluence of 0.58 J/cm{sup 2}; Group 6 (G6) was irradiated with Er:YAG laser (2.94{mu}m), 83 mJ/10 Hz, focused, under water spray during 15 seconds and fluence of 1.03 J/cm{sup 2}. The micrographic were analyzed by scores and following the statistical analysis with Kruskal Wallis (p<0.05) H=20,31. The G1 was significantly different of all groups (28.0); the G2 (13.4), G3 (11.7), and G4 (13.6) showed no difference in relation to G5 (20.3) and G6 (6.0), but the G6 was significantly different from G5. From the results, it can be conclude that: 1) there was intensity smear layer after scaling and root planing; 2) all treatments were effective to smear layer remove with significantly difference to G2, G3, G4, G5 and G6; G2, G3 and G4 were not statistically different from G5 and G6; 3) G6 was more effective in the smear layer remotion in relation to G5 and both presented irregular root surface. (author)

  2. Influence of different water-ethanol solvent systems on the spectroscopic and physico-chemical properties of the macrocyclic compounds pheophytin and chlorophyll a; Influencia de diferentes sistemas de solvente agua-etanol sobre as propriedades fisico-quimicas e espectroscopicas dos compostos macrociclicos feofitina e clorofila a

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Leonardo M.; Rodrigues, Maira R.; Oliveira, Hueder P. M. de [Universidade Camilo Castelo Branco, Sao Jose dos Campos, SP (Brazil); Lima, Adriana [Universidade do Vale do Paraiba, Sao Jose dos Campos, SP (Brazil); Soares, Rafael R. S.; Batistela, Vagner R.; Gerola, Adriana P.; Hioka, Noboru [Universidade Estadual de Maringa (UEM), PR (Brazil). Dept. de Quimica; Severino, Divinomar; Baptista, Mauricio S. [Universidade de Sao Paulo, (USP), SP (Brazil). Inst. de Quimica; Machado, Antonio Eduardo da Hora [Universidade Federal de Uberlandia (UFU), MG (Brazil). Inst. de Quimica

    2010-07-01

    This work focus on the influence of solvent on the photophysical properties of chlorophyll a and pheophytin. Both compounds are related to the photosynthesis process and are considered prototypes of photosensitizers in Photodynamic Therapy. Fluorescence measurements were developed using water/ethanol mixtures at different compositions, since both solvents could be employed in biological applications. The spectroscopic properties of these compounds undergo profound changes depending on water content in the ethanol due to auto-aggregation processes. The major hydrophobicity and the lower dielectric constant of ethanol when compared with water precluded significantly the auto-aggregation process of these compounds. (author)

  3. Computerized tomography with X-rays: an instrument in the analysis physico-chemical between formations and drilling fluids interactions; Tomografia computadorizada com raios-X: uma ferramenta na analise das interacoes fisico-quimicas entre as formacoes rochosas e fluidos de perfuracao

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Marcus Vinicius Cavalcante

    1998-12-31

    In this study it is demonstrated the applicability of the Computerized Tomography technique with x-rays to evaluate the reactivity degree between various drilling fluids and argillaceous sediments (Shales and Sandstones). The research has been conducted in the Rock-Fluid Interaction Pressure Simulator (RFIPS), where the possible physico-chemical alterations can be observed through successive tomography images, which are obtained during the flow of the fluid through the samples. In addition, it was noticed the formation of mud cake in Berea Sandstones samples in the RFIPS, though the Computerized Tomography with X-rays, when utilizing drilling fluids weighted with the baryte. (author) 35 refs., 38 figs., 5 tabs.

  4. Chemical Changes Induced by Irradiation in Meats and Meat Components; Transformations Chimiques Provoquees par les Rayonnements dans les Viandes et Leurs Constituants; Khimicheskie prevrashcheniya v myasnykh produktakh i ikh sostavnykh chastyakh pod vozdejstviem oblucheniya; Alteraciones Quimicas Producidas por Irradiacion de las Carnes y de sus Componentes

    Energy Technology Data Exchange (ETDEWEB)

    Merritt, C. Jr. [Pioneering Research Division, United States Army Natick Laboratories, Natick, MA (United States)

    1966-11-15

    The acceptability of meats preserved by irradiation has been hampered by the formation of an irradiation flavour and odour. This flavour and odour is believed to be due to the volatile chemical compounds produced by radiation impact on the protein and lipid molecules. The analysis of the volatile compounds has been accomplished, employing programmed cryogenic temperature gas chromatography for separation of the complex mixtures obtained, and rapid scanning mass spectrometry for identification of the individually separated components. Comprehensive analyses of the volatiles from irradiated ground beef, pork, mutton, lamb, and veal, as well as the volatile irradiation degradation products of several amino acids and proteins, animal fats, methyl esters of fatty acids, and triglycerides have been made. The results of the analysis of the irradiated component meat substances are compared with those obtained from the irradiation of meat itself, and of separate meat fractions, thus establishing the contribution of each fraction to the total. Mechanisms are postulated for the formation of the volatile components from each fraction and for interactions among intermediates from different fractions. (author) [French] La comestibilite des viandes conservees par les rayonnements s'est trouvee diminuee a la suite de l'apparition dans celles-ci d'un gout et d'une odeur engendres par l'irradiation. On pense que ces derniers sont dus aux composes chimiques volatils qui sont formes par l'action des rayonnements sur les molecules des proteines et des lipides. Il a ete procede a l'analyse des composes volatils a l'aide d'un programme de chromatographie en phase gazeuse a temperature cryogenique visant a separer les constituants des melanges complexes obtenus, et par spectrometrie de masse a balayage rapide destinee a identifier les constituants separes. L'auteur a effectue des analyses completes des composes volatils emanant de viande hachee de boeuf, de porc, de mouton, d'agneau et de veau; il a egalement analyse les produits volatils de la degradation, par les rayonnements de plusieurs acides amines et proteines, de graisses animales, d'esters methyliques d'acide gras et de triglycerides. L'auteur compare les resultats de l'analyse des substances constitutives de la viande soumises a l'irradiation avec ceux obtenus par l'irradiation de la viande elle-meme et de fractions distinctes de viande, ce qui permet de determiner l'apport de chaque fraction a l'ensemble. Il postule des mecanismes expliquant la formation des elements volatils dans chacune de ces fractions ainsi que les interactions entre les sub- stances, intermediaires des differentes fractions. (author) [Spanish] El mal sabor y el mal olor originados por la irradiacion de la carne conservada son un obstaculo para su aceptacion. Se cree que este sabor y este olor desagradables se deben a.los compuestos quimicos volatiles producidos por las radiaciones en las moleculas de proteinas y lipidos. Se han analizado los compuestos volatiles por cromatografia en fase gaseosa a temperaturas sumamente bajas y con arreglo a un programa, para determinar las mezclas complejas obtenidas, y por espectrometria de masas con exploracion rapida, para identificar los componentes separados. Se han efectuado analisis minuciosos de las sustancias volatiles formadas por irradiacion en carne picada de vaca, cerdo, carnero, cordero y ternera, asi como de los productos volatiles de degradacion originados por las radiaciones en varios aminoacidos y proteinas, grasas animales, esteres metilicos de acidos grasos y trigliceridos. Los resultados del analisis de los componentes de la carne irradiados se comparan con los obtenidos irradiando la carne misma y distintas fracciones de ella. Se postulan los mecanismos de formacion de los componentes volatiles de cada fraccion y los de las interacciones de las fases intermedias correspondientes a distintas fracciones. (author) [Russian] Obluchenie razlichnyh sortov mjasa s cel'ju konservacii otrazhaetsja na vkusovyh kachestvah, vyzyvaja pojavlenie specificheskogo privkusa i zapaha. Polagajut, chto jeto ob{sup j}asnjaetsja obrazovaniem letuchih himicheskih soedinenij pri dejstvii radiacii na belki i lipidnye molekuly. Analiz letuchih soedinenij osushhestvljaetsja na gazovom hromatografe s kriogennym ohlazhdeniem do zadannoj temperatury, gde proishodit razdelenie slozhnyh smesej. Identifikacija vydelennyh komponentov provoditsja s pomoshh'ju mass-spektrometrii s bystrym skennirovaniem. Proveden ischerpyvajushhij analjz letuchih soedinenij, vydeljajushhihsja iz govjadiny, svininy, baraniny i teljatiny, kotorye byli oblucheny, a takzhe analiz letuchih soedinenij, obrazujushhihsja pri razlozhenii pod dejstviem obluchenija nekotoryh aminokislot, belkov, zhivotnogo zhira, metilovyh jefirov zhirnyh kislot i trigliceridov. Rezul'taty analizov obluchennyh komponentov mjasnyh produktov sravnivajutsja s rezul'tatami, poluchennymi pri obluchenii samogo mjasa i ego otdel'nyh frakcij, chto daet vozmozh - nost' ustanovit' rol' kazhdoj frakcii v celom. Postulirujutsja mehanizmy obrazovanija letuchih komponentov ot kazhdoj frakcii, a takzhe vzaimodejstvie promezhutochnyh produktov ot razlichnyh frakcij. (author)

  5. Computerized tomography with X-rays: an instrument in the analysis physico-chemical between formations and drilling fluids interactions; Tomografia computadorizada com raios-X: uma ferramenta na analise das interacoes fisico-quimicas entre as formacoes rochosas e fluidos de perfuracao

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Marcus Vinicius Cavalcante

    1999-12-31

    In this study it is demonstrated the applicability of the Computerized Tomography technique with x-rays to evaluate the reactivity degree between various drilling fluids and argillaceous sediments (Shales and Sandstones). The research has been conducted in the Rock-Fluid Interaction Pressure Simulator (RFIPS), where the possible physico-chemical alterations can be observed through successive tomography images, which are obtained during the flow of the fluid through the samples. In addition, it was noticed the formation of mud cake in Berea Sandstones samples in the RFIPS, though the Computerized Tomography with X-rays, when utilizing drilling fluids weighted with the baryte. (author) 35 refs., 38 figs., 5 tabs.

  6. Microbiological, physico-chemical, and sensorial modifications during the useful life of the shrimps (Penaeus brasiliensis e Penaeus Paulensis) submitted to gamma radiation.; Alteracoes microbiologicas, fisico-quimicas e sensoriais durante a vida util do camarao-rosa (Penaeus brasiliensis e Penaeus Paulensis) submetido a radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Mayer, Mariana Del Ben

    2000-07-01

    During the last years, there has been an increase in the consumption of seafood and freshwater fish as a healthier diet option. Shrimps are the most important product in the international trade market. This kind of food easily deteriorates due to autolysis, oxidation and microbial action. This research was carried out in order to study the effectiveness of radiation in preserving shrimps. Samples of shrimps (Penaeus brasiliensis and P. paulensi) were submitted to gamma radiation doses of O kGy, 1 kGy, 2 kGy, 2.5 kGy, 3 kGy and 3.5 kGy and stored under refrigeration. The microbiological analysis was performed on days O, 2, 4, 7 10 and 14 post processing. Simultaneously, the pH and total, volatile bases (TVBN) were determined. The psychotropic population varied from <2.0 log to 8.08 log CFU/g while the mesophilic ranged from <1.0 109 to 6.03 log CFU/g; pH varied from 7.52 to 8.33 and TVBN from 28.47 to 56.00 mg N/100g, according to the radiation dose and the day of analysis. Black spots, changes in the characteristic odour and TVBN levels showed the beginning of a chemical deterioration as of the 4 th day of analysis. Doses of 3 kGy and 3.5 kGy presented the best results. Pseudomonas spp. showed the highest sensitivity to radiation. Due to the lapse of time between capturing shrimps and returning to land together with inadequate manipulation and storage in the boat, the quality of raw material is prejudiced which makes the radiation process unfeasible. (author)

  7. Effects of the modified atmosphere and irradiation on the microbiological, physical-chemical and sensory characteristics of the 'minas frescal' cheese;Efeitos da atmosfera modificada e da irradiacao sobre as caracteristicas microbiologicas, fisico-quimicas e sensoriais do queijo minas frescal

    Energy Technology Data Exchange (ETDEWEB)

    Rosa, Vanessa Pires da

    2004-07-01

    The experiment was divided into two parts. Initially, it was studied the 'Minas Frescal' cheeses packed under atmospheric air, modified atmosphere of 70% CO2 and 30% N2 (ATM) and vacuum. Second the cheeses packed under these three treatments had been radiated by doses of 2 KGy. In the two parts of the experiment, it was analyzed the microbial evolution and, the sensory and physical-chemical characteristics of the cheeses under the different treatments during a 4 deg C-storage. In the first phase of the experiment it was verified that the ATM and the vacuum decreased the intensity of the total population growth of aerobic mesophilic and psychotropic and had reduced the population of Staphylococcus positive coagulase, but they had not been efficient controlling the total coliforms and Escherichia coli, while in control all the populations had continuously grown, according to the sensory characteristics of the cheeses, color, odor and appearance. These characteristics were kept the same during the 40 days of storage, and the control decreased the acceptability levels gradually, being rejected in the 17{sup th} day. In the second part of the experiment, it was observed that a 2KGy-irradiation over the 'Minas Frescal' cheeses reduced the populations of aerobic mesophilic, aerobic and anaerobic psychotropic, Staphylococcus positive coagulase, total coliforms and Escherichia coli. The ATM and vacuum treatments were very efficient therefore they prevented the growth of these microorganisms during the storage, while in control, the aerobic mesophilic and psychotropic population grew during the storage. According to sensory aspects, the ATM treatment was the most efficient one, because it kept the appearance, texture and flavor for more than 43 days while the vacuum kept for 36 days and the control for only 8 days. The use of the irradiation with modified atmosphere and low temperatures of storage increased the shelf life of the cheeses, hindering the growth of the microbial populations in the product and keeping product sensory characteristics. (author)

  8. Mitigation strategies of intergranular corrosion in systems of reactors of water boiling (BWR). Combined action of the chemistry of the hydrogen and the oxygen; Estrategias de mitigacion de la corrosion intergranular en sistemas de reactores de agua en ebullicion (BWR). Accion combinada de la quimica del hidrogeno y del oxigeno

    Energy Technology Data Exchange (ETDEWEB)

    Verdugo, M.

    2015-07-01

    Inter-Granular Stress Corrosion cracking (IGSCC) in austenitic stainless steel and in austenitic nickel-based alloys has been the subject of many studies the aim of which was to resolve one of the main problems faced by BWR nuclear power plants since the 1960s. This corrosion phenomenon is the result of the combined action of three factors: sensitization of the material, high local stresses and an aggressive medium. This paper deals with these factors separately and analyzes the oxidative chemistry of BWR reactors (aggressivity of the medium) as one the main causes if IGSCC. (Author)

  9. Petrography, mineral chemistry and lithochemistry of the albitite and granite-gneissics rocks of anomaly 35 from Lagoa Real uranium province; Petrografia, quimica mineral e litoquimica do albitito e das rochas granito-gnaissicas da anomalia 35, provincia uranifera de Lagoa Real

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Camila Marques dos

    2016-07-01

    In the northwestern portion of the Lagoa Real Uranium Province (LRUP), located in south-central Bahia, it is located one of the most promising uranium anomalies Brazil (an35, Gameleira I deposit), the reserves and proximity to the Cachoeira mine. Other anomalies of this sector (eg. 31 AN and AN34), are also considered strategic for the content of radioactive minerals and REE. The objective was to develop a study of a representative drill core of an35, where the main rocks PULR are present. The research focused on the mineralogical and chemical changes observed in the passages of a lithology to another, from the rock to the meta granitic albitites, through gneiss and transitional rocks, and making comparisons with similar lithologies sampled on testimonies of AN31 and 34. The granites are classified as hypersolvus coarse alkali-feldspar granite and are variably deformed. The main mineral assemblage in granites are perthitic orthoclase+hedenbergite+ quartz +hastingsite + biotite, and zircon, apatite, ilmenite and titanite are accessories. The reddening of these rocks are characterized by feldspars sericitization and hematitization and the presence of 'vazios'. The gneisses are mainly gray and reach milonitic to protomilonitics terms. These rocks have characteristics of subsolidus changes as swapped rims and metasomatic perthites. The tardi-magmatic association (amphibole+biotite) indicates final crystallization or late influx by superficial fluids resulting in an increase in water and volatiles, such as F and Cl in the system, which must also have carried rare-earth elementsGranites have geochemical affinity with A-type ferroan granite, A2, reduced and are post-collisional. Their patterns of incompatible elements and rare earths are comparable to Sao Timoteo Granite, but their petrographic features indicate that it is a less common granite facies. Albitites were classified as garnet albitites, magnetite albitites and biotite albitites. Contacts between albitites and gneisses are macroscopically gradational, however, in the garnet albitites replacement of granitic mineral facies by the albitite facies were observed petrographically, implying a granitic protolith for this rock. On the other hand, magnetite albitites do not have clear relationship with granites. Albitites usually have porphyroblastic texture with granoblastic polygonal matrix and chessboard texture in albite porphyroclasts. The garnet albitites comprise hedenbergite, hastingsite, garnet, magnetite and sphena. Magnetite albitites, in turn, have hedenbergite, Fe-edenite, biotite, martitized magnetite, allanite and sphene. The diopside+actinolite+eastonita association is late, and in these rocks, it is restricted to more deformed portions or filling voids. The biotite albitites comprise biotite, zircon and apatite hedenbergite (?). Mineralization occurs in magnetite albitites as thin lenses composed by sphene, magnetite, carbonate and zircon. The uranium mineral is the uraninite, which occurs filling spaces between crystals and sphene or albite granules. In comparison to granites, albitites have a higher content of Na{sub 2}O, MgO, V, W, Zr, Pb and Sr for and lower K{sub 2}O, SiO{sub 2} and F. They have a geochemical REE pattern that is identical to that of granite. The similarity between macroscopic granites and albitites, the presence of vazios, feldspar hematitization and sericitization causing macroscopical reddening in transitional portions and the replacement of potassic feldspar by albite and oligoclase are suggestive of episyenitization processes. The metasomatic perthites and presence of chessboard texture in porphyroclasts indicate successive albitization processes prior to deformation. The comparison between albitite samples of different drill cores and anomalies shows that there are differences in the formation and mineralization of these rocks. The V and Mg enrichment in some albitites suggests that these rocks may result from the interaction of fluids with different compositions with varied range of rocks, such as granite, syenite and mafic rocks. Thus, albitite s must be the result of successive processes of change influenced by the interaction of fluids with different rocks in the area, and varying compositionally on a local scale. (author)

  10. Identification, quantification and comparison between the chemical substances responsible for the irradiated pot still cachaca and commercial rum aromas; Identificacao, quantificacao e comparacao das substancias quimicas responsaveis pelos aromas da cachaca de alambique e do rum comercial tratados pelo processo de irradiacao

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Maria Djiliah Camargo Alvarenga de

    2006-07-01

    The irradiation process has being presented as an alternative technique in food preservation. When applied on beverages, radiation is mainly used for malt decontamination or sterilization of musts and had been proposed also to accelerate aging. Some confusion over rum and cachaca identities has arisen due to the internationalization of cachaca. This research aims to identify, quantify and compare the effect of gamma radiation on the aroma of the Brazilian spirit with rum, irradiated and non irradiated, by instrumental and sensory analysis. Results showed that the content of volatile compounds presented strong correlation with the radiation dose (0,150 and 300 Gy) for all the samples. According to Triangle Test for aroma, all the judges could distinguish among non irradiated and irradiated samples (300 Gy), aged cachaca from rum and non aged cachaca from rum, but they could not distinguish aged cachaca from non aged cachaca. Analysis of variance (ANOVA) of the results from the quantitative descriptive analysis showed that non irradiated non aged cachaca and rum were different in their alcohol, vinegar, vanilla, citrus, melon, spice, vegetal and grass except caramel and apple aroma attributes. Non irradiated cachaca and irradiated cachaca (300 Gy); and non irradiated rum and irradiated rum (300 Gy) were different in their apple, caramel, vinegar, vanilla, citrus, melon, spice, vegetal and grass except alcohol aroma attributes. According to the gas chromatography/olfactometry results, significant difference was found among non irradiated cachaca and rum; non irradiated cachaca and irradiated cachaca (300 Gy); and non irradiated rum and irradiated rum (300 Gy) when their aromas were compared. (author)

  11. Characterization and corrosion behavior of phytic acid coatings, obtained by chemical conversion on magnesium substrates in physiological solution; Caracterizacion y comportamiento frente a la corrosion de recubrimientos de acido fitico, obtenidos por conversion quimica, sobre substratos de magnesio en solucion fisiologica

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez-Alvarado, L. A.; Lomeli, M. A.; Hernandez, L. S.; Miranda, J. M.; Narvaez, L.; Diaz, I.; Garcia-Alonso, M. C.; Escudero, M. L.

    2014-10-01

    In order to improve the corrosion resistance of biodegradable magnesium and AZ31 magnesium alloy implants, a phytic acid coating has been applied on both substrates and their protective effect against corrosion has been assessed. The morphology and the chemical nature of the conversion coating were analyzed by SEM/EDX, XRD and FTIR. The spectra showed that the conversion coating was amorphous, and it was composed of Mg, O, and P on magnesium surface, along with Al, Zn and C on AZ31 alloy. The main coating components were chelate compounds formed by phytic acid and metallic ions. The corrosion resistance of bare and coated samples was evaluated by potentiodynamic polarization technique in Hank's solution at 37 degree centigrade. The results indicate that phytic acid conversion coatings provided a very effective protection to the magnesium substrates studied. (Author)

  12. Microbiological testing and physical and chemical analysis of reconstituted fruit juices and coconut water
    Avaliação microbiológico e caracterização físico-quimica de refrescos e água de coco

    Directory of Open Access Journals (Sweden)

    F. B. PILÓ

    2010-04-01

    Full Text Available

    The aim of this study was to assess the quality of reconstituted fruit juices and coconut water sold for immediate consumption in bars, restaurants and bakeries, and by street vendors in Belo Horizonte (Minas Gerais, Brazil. Microbial quality was determined by counting coliforms, yeasts, staphylococci and salmonellae. Total titratable acidity, pH and total soluble solids of these beverages were recorded. For coconut water samples, the total reducing sugar content was also determined. The “juices” collected included reconstituted orange, cashew and grape-fl avored juice powders and concentrated cashew juice. Sixty samples of these juices and 45 of coconut water were collected. More than half (55% of the juice samples did not comply with current Brazilian legislation, which states that there must be a total absence of coliforms in a 50 mL sample. Sixteen percent of the coconut water samples exceeded the bacterial count limits defi ned in Brazilian law, with thermotolerant coliform densities above 102 MPN / mL. The high levels of sugar and low pH found in the coconut water were possibly related to the high yeast counts in most samples. Forty-seven percent of coconut water samples showed staphylococcal counts above 103 CFU/mL. The numbers of thermotolerant coliforms, yeasts and staphylococci found suggest unsatisfactory hygienic practices during the preparation of these beverages. Salmonellae were not detected in any of the samples. The physical and chemical properties of the drinks varied among the samples. Our results suggest that both the reconstituted juices and coconut waters need better hygienic and sanitary control.

  13. Study of chemical interaction induced by ionizing radiation poly(dimethylsiloxane-g-ethylene oxide) in the poly(n-vinyl-2-pyrrolidone) and agar membrane; Estudo da interacao quimica do poli(dimetilsiloxano-g-oxido de etileno) na membrana de poli(n-vinil-2-pirrolidona) e agar induzida com radiacao ionizante

    Energy Technology Data Exchange (ETDEWEB)

    Bazzi, Aurea de Souza

    1999-07-01

    Membrane composed by poly(N-vinyl-2-pyrrolidone) (PVP) and agar was formulated with and without poly(dimethylsiloxane-g-ethylene oxide) (SEO) irradiated with electron beam with doses between 10-50 kGy. The radiolytic behaviour of each component, PVP, agar and SEO, was studied when irradiated by gamma ray, in the absence and presence of air and water, by electron paramagnetic resonance (EPR) at 77 K. The chemical interaction of SEO with PVP/agar membrane was investigated by: infrared spectroscopy, energy dispersive X-ray fluorescence, dynamic-mechanical analysis, scanning electron microscopy, gel and swelling analysis. The cytotoxicity of the PVP/agar/SEO membrane was evaluated by cellular suppression. The membrane radicals from PVP ({phi}NC.) and from water (H., OH. and H{sub 2}O) was observed by EPR at 77K. The agar radicals formed by hydrogen abstraction of C{sub 1} and C{sub 3} of {beta}-D-galactose and/or C{sub 1} and C{sub 4} of {alpha}-L-galactose, reacted primarily with water radicals in despite of they also took part in the membrane by chemical bond. The radicals from SEO (.CH{sub 2}{approx}, .Si{approx}, .O{approx}) participated in the inter and intramolecular crosslinking as co-crosslinker by polymeric bridge. The co-crosslinked action depended on its concentration associated to PVP concentration. The presence op acrylates increases the tensile break of the PVP/agar/SEO membrane significantly. (author)

  14. Composicao quimica, perfil de acidos graxos e quantificacao dos acidos ƒ¿-linolenico, eicosapentaenoico e docosahexaenoico em visceras de tilapias (Oreochromis niloticus = Percentual composition, fatty acids and quantification of the LNA (Alfa-Linolenic, EPA (Eicosapentaenoic and DHA (Docosahexaenoic acids in visceras of Nile Tilapia (Oreochromis niloticus

    Directory of Open Access Journals (Sweden)

    Nilson Evelázio de Souza

    2005-01-01

    Full Text Available Foi avaliada a composição química de vísceras de tilápias (Oreochromis niloticus criadas em cativeiro Os teores de umidade, cinza, proteína bruta e lipídios totais foram de 64,4%; 1,3%; 6,3% e 18,0%, respectivamente, caracterizando alta concentração de lipídiostotais em relação a outros resíduos de peixes. Foram identificados 49 ácidos graxos, sendo majoritários os ácidos: oléico, (32,8%, seguido do palmítico, (19,9% e linoléico, (18,2%. As razões entre n-6/n-3 e ácidos poliinsaturados/saturados foram de 5,5 e 0,9, respectivamente. As quantificações dos ácidos graxos alfa-linolênico, eicosapentaenóico e docosahexaenóico, em mg/g de lipídios totais, foram de 10,4, 1,4 e 9,3, respectivamente. O elevado teor de lipídios totais das vísceras contribuiu significativamente para as quantidadesde ácidos graxos n-3. Todos os parâmetros analisados foram satisfatórios sob o ponto de vista nutricional e neste sentido as vísceras de tilápias poderão ser utilizadaa para alimentar peixes ou outros animais.The chemical composition was evaluated in visceras of tilapias raised in captivity. The moisture, ash, crude protein and total lipids contents were 64.4%; 1.3%; 6.3% and 18.0%, respectively, characterizing high total lipids concentration in relation other residues of fish. Forty nine fatty acids were detected, the major fatty acids were oleic (32.8%, palmitic (19.9% and linoleic-1 (18.2% and oleic (9.4%. The ratio n-6/n-3 and polyunsaturated/saturated fatty acids, showed the values 5.5 and 0.9, respectively. The quantifications of alfa-linolenic, eicosapentaenoic and docosahexaenoic acids (in mg/g of total lipids, were 10.4, 1.4 and 0.3, respectively. The higher contents of total lipids in visceras contributed significantly for amounts of n-3 fatty acids. All the parameters analyzed were shown nutritional value satisfactory in this sense visceras of tilapias can be used in the feed of fish and other animal.

  15. Chemical synthesis, characterization studies and reactivity of a catalytic material based on ZrO{sub 2}-H{sub 3}PW{sub 12}O{sub 40}; Sintesis quimica, estudios de caracterizacion y reactividad de un material catalitico a base de ZrO{sub 2}-H{sub 3}PW{sub 12}O{sub 40}

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Enriquez, Juan Manuel; Garcia Alamilla, Ricardo; Paramo Garcia, Ulises; Rodrigo, Rebeca Silva [Instituto Tecnologico de Ciudad Madero, Tamaulipas (Mexico). Division de Estudios de Posgrado e Investigacion; Garcia Serrano, Luz Arcelia, E-mail: jmanuelher@hotmail.com [Instituto Politecnico Nacional, Mexico, D.F. (Mexico). Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente

    2013-10-01

    In this work, the preparation and characterization of materials such as zirconium oxide (ZrO{sub 2}) and phosphotungstic acid promoted zirconium oxide (ZrO{sub 2}-H{sub 3}PW{sub 12}O{sub 40}) is presented. Physico-chemical characterization results showed that addition of H{sub 3}PW{sub 12}O{sub 40} acted as both a textural and chemical promoter of zirconium oxide. The incorporation of phosphotungstic acid into the ZrO{sub 2} matrix delayed the sintering of the material and stabilized ZrO{sub 2} in the tetragonal phase. ZrO{sub 2} acidity was also enhanced, developing strong acid sites on its surface. The Pt/ZrO{sub 2}-H{sub 3}PW{sub 12}O{sub 40} catalyst was active for n-pentane isomerization at 250 deg C, exhibiting high selectivity to iso-pentane (95%). This result is probably due to its suitable acidity (author)

  16. Physical, chemical and radioactive characterization of co-products from titanum dioxide industry for valorization in the cement industry; Caracterizacion fisico-quimica y radiactiva de los sub-productos provenientes de la industria de dioxido de titanio para su valorizacion en la industria del cemento: implicaciones radiologicas.

    Energy Technology Data Exchange (ETDEWEB)

    Gazquez, M.J.; Mantero, J.; Bolivar, J.P.; Garcia-Tenorio, R.; Vaca, F.

    2011-07-01

    The present study was conducted to characterize the raw materials (ilmenite and slag), waste (red gypsum) and several co-products (sulphate monohydrate and sulphate heptahydrated) form the titanum dioxide industry in relation to their elemental composition (major, minor and trace elements), granulometry, mineralogy, microscopic morphology, physical composition and radioactive content in order to apply this knowledge in the valorization of the co-products in the fields sucha as construction, civil engineering, etc. In particular, the main properties of cements produced with different proportions of red gypsum were studied, and the obtained improvements, in relation to Ordinary Portland Cements (OPC) were evaluated. It was also demonstrated that the levels of pollutants and the radioactive content in the produced RG cements, remain within the regulated safety limits. (Author). 38 refs.

  17. Physical, chemical and radioactive characterization of co-products from titanium dioxide industry for valorization in the cement industry; Caracterizacion fisico-quimica y radiactiva de los sub-productos provenientes de la industria de dioxido de titanio para su valorizacion en la industria del cemento: implicaciones radiologicas.

    Energy Technology Data Exchange (ETDEWEB)

    Gazquez, M.J.; Mantero, J.; Bolivar, J.P.; Garcia-Tenorio, R.; Vaca, F.

    2011-07-01

    The present study was conducted to characterize the raw materials (ilmenite and slag), waste (red gypsum) and several co-products (sulphate monohydrate and sulphate heptahydrated) form the titanium dioxide industry in relation to their elemental composition (major, minor and trace elements), granulometry, mineralogy, microscopic morphology, physical composition and radioactive content in order to apply this knowledge in the valorization of the co-products in the fields such a as construction, civil engineering, etc. In particular, the main properties of cements produced with different proportions of red gypsum were studied, and the obtained improvements, in relation to Ordinary Portland Cements (OPC) were evaluated. It was also demonstrated that the levels of pollutants and the radioactive content in the produced RG cements, remain within the regulated safety limits. (Author). 38 refs.

  18. Behavior patterns of chemical and isotopic species (2006-2007) in the Los Azufres, Mich., geothermal field, as a response to reinjection; Patrones de comportamiento de especies quimicas e isotopicas (2006-2007) en el campo geotermico de Los Azufres, Mich., en respuesta a la reinyeccion

    Energy Technology Data Exchange (ETDEWEB)

    Barragan R, Rosa Maria; Arellano G, Victor Manuel; Martinez E, Ignacio; Aragon A, Alfonso [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)]. E-mail: rmb@iie.org.mx; Reyes D, Lisette; Gonzalez, Rubi [Comision Federal de Electricidad, Gerencia de Proyectos Geotermoelectricos, Residencia de Los Azufres, Morelia, Michoacan (Mexico)

    2009-07-15

    Chemical and isotopic ({delta}18 O y {delta}D) data from the Los Azufres geothermal field fluids for 2006 and 2007 were analyzed to investigate changes in their behavior patterns and their relation to reinjection. Total discharge chlorides, reservoir temperatures, excess steam in well feeding fluids, CO{sub 2} concentrations at reservoir and total discharge conditions, and liquid saturations were calculated. Contour lines of certain parameters were obtained for 2006 and 2007 to relate them to the contours obtained for 2005 and to the reinjection histories. Fluid isotopic compositions, including injection fluids, were correlated to estimate fluid mixing effects between the reservoir and reinjection fluids. Results suggest chemical parameters respond to the mass flow rate injected and to the isotopic composition of injection fluids. {delta}D vs {delta}18 O relationships show a number of wells produce different proportions of reinjection returns. In the northern zone, wells AZ-65D, AZ-13, AZ-32, AZ-9A, AZ-9AD, AZ-28A, AZ-69D and AZ-44 produce relatively high proportions, while wells AZ-5, AZ-28 and AZ-19, among others, produce lower proportions. Wells AZ-2A, AZ-16AD, AZ-46 and AZ-33 from the southern field zone produce higher proportions of reinjection returns while wells AZ-34, AZ-36 and AZ-37 produce lower proportions. The liquid saturation distribution in 2007 shows the maximum saturation zones have decreased compared with 2005 and 2006 data. In 2007, maximum liquid saturations were found around wells AZ-22 and AZ-23 (southern zone) and AZ-28, AZ-32, AZ-45 and AZ-48 (northern zone). Minimum saturations were found around wells AZ-6 and AZ-16 (southern zone) and AZ-56 (northern zone). The CO{sub 2} levels for the reservoir liquid were used to trace paths of reinjection fluids, considering these fluids are depleted in this gas. Thus the minimum CO{sub 2} contour lines indicate the movement of the reinjection fluids in the reservoir. [Spanish] Se analizaron datos quimicos e isotopicos ({delta}18 O y {delta}D) de fluidos de pozos del campo geotermico de Los Azufres, Mich., obtenidos en 2006 y 2007, para investigar los cambios ocurridos en sus patrones de comportamiento y su relacion con el proceso de reinyeccion de fluidos al yacimiento. El analisis de los datos comprendio las estimaciones de cloruros en las descargas totales, temperaturas de yacimiento, exceso de vapor en los fluidos de alimentacion, las concentraciones de CO{sub 2} en las descargas totales y en la fase liquida del yacimiento y las saturaciones de liquido en la formacion. Con los resultados se elaboraron mapas de isovalores de los parametros mencionados correspondientes a 2006 y 2007 para investigar su evolucion con respecto a los mapas obtenidos en 2005, asi como su relacion con las historias de reinyeccion. Se correlacionaron las composiciones isotopicas de los fluidos incluyendo los de reinyeccion para estimar efectos de mezcla de fluidos. Los resultados indican que las variables estudiadas responden a las tasas de reinyeccion en el campo. Las relaciones {delta}D vs {delta}18 O indican que un buen numero de pozos del campo producen diferentes proporciones de retornos de reinyeccion; en la zona norte los pozos AZ-65D, AZ-13, AZ-32, AZ-9A, AZ-9AD, AZ-28A, AZ-69D y AZ-44 producen una mayor proporcion mientras que los pozos AZ-5, AZ-28 y AZ-19 entre otros, producen una menor proporcion. En la zona sur los pozos AZ-2A, AZ-16AD, AZ-46 y AZ-33 producen relativamente altas proporciones de retornos de reinyeccion mientras que los pozos AZ-34, AZ-36 y AZ-37 producen menores proporciones. La distribucion de saturaciones de liquido hallada en 2007 muestra que las areas de maxima saturacion han disminuido con respecto a las distribuciones de este parametro en 2005 y 2006. En 2007 las saturaciones maximas de liquido se localizaron alrededor de los pozos AZ-22 y AZ-23 (zona sur) y AZ-28, AZ-32, AZ-45 y AZ-48 (zona norte), mientras que las saturaciones minimas se localizaron en los pozos AZ-6 y AZ-16 (zona sur) y AZ-56 (zona norte). El CO{sub 2} del liquido del yacimiento mostro ser eficaz para trazar el avance de los fluidos inyectados, agotados en CO{sub 2}, hacia las zonas productoras de los pozos.

  19. Preliminary experiments on the use of radioactive indicators in macromolecular chemistry; Experiences preliminaires sur l'utilisation des indicateurs radioactifs en chimie macromoleculaire; Predvaritel'nye opyty ispol'zovaniya radioaktivnykh indikatorov v makromolekulyarnoj khimii; Ensayos preliminares sobre el empleo de indicadores radiactivos en quimica macromolecular

    Energy Technology Data Exchange (ETDEWEB)

    De Brouckere, L; Van Leemput, R; Stein, R [Laboratoire de Chimie Generale II, Universite Libre de Bruxelles (Belgium)

    1962-03-15

    In studies of osmotic phenomena with high polymers, two causes of error are particularly important: (a) Diffusion of low-molecular-weight polymers across the membrane; (b) Polymer adsorption on the membrane. For investigations on both these phenomena radiotracer methods present decisive advantages over the classical and far less sensitive gravimetric procedures. The polymer used in the authors' experiments was a hetero-disperse sample of (poly) chloro-butyl acrylate which was ionically chlorinated with Cl{sup 36} starting from a sample of (poly)butyl acrylate. This polymer was dissolved in acetone. Diffusion chambers similar to twin-cell osmometers were set up. Cellophane membranes with permeabilities of 6.7 x 10{sup -5} h{sup -1} to 30.6 x 10{sup -5} h{sup -1} separated the solution from the solvent. It was found that: (a) With our apparatus, about two hundred hours were necessary to reach an equilibrium or steady state in diffusion experiments; (b) The fraction of polymer diffusing through the membrane in a given time was independent of the concentration; (c) The amount of polymer diffusing was related to the permeability of the membrane; (d) A practically irreversible adsorption of polymer on the membrane was observed (30 to 40 {mu}g/cm{sup 2}). (author) [French] Dans les etudes sur les phenomenes osmotiques avec de hauts polymeres, deux causes d'erreurs sont particulierement importants : a) La diffusion des polymeres de faible poids moleculaire a travers la membrane; b) L'adsorption des polymeres sur la membrane. Pour les recherches sur ces deux phenomenes, la methode des radiotraceurs presente des avantages decisifs par rapport aux procedes gravi metriques classiques, beaucoup moins sensibles. Le polymere utilise dans les experiences des auteurs etait un echantillon a dispersion heterogene acrylate de (poly) chloro-butyle, obtenu par chlorruation ionique d'un echantillon d'acrylate de (poly)butyle avec du chlore-36. Ce polymere etait dissous dans de l'acetone. On a utilise des chambres de diffusion analogues aux osmometres a cellules jumelles. Des membranes de cellophane de permeabilite 6,7 {center_dot} 10{sup -5} h{sup -1} a 30,6 {center_dot} 10{sup -5} h{sup -1} separaient la solution du solvant. On a constate: a) Qu'avec l'appareil utilise dans les experiences de diffusion, il fallait environ deux cents heures pour atteindre un etat d'equilibre ou un etat stationnaire; b) Que la fraction de polymere se diffusant a travers la membrane dans un temps donne etait independante de la concentration; c) Que la quantite de polymere diffuse variait en fonction de la permeabilite de la membrane; d) Qu'il se produisait une adsorption pratiquement irreversible du polymere sur la membrane (30 a 40 {mu}g/cm{sup 2}). (author) [Spanish] Las dos principales fuentes de error cuando se estudian fenomenos osmoticos con polimeros de elevado peso molecular son: a) la difusion de polimeros de bajo peso molecular a traves de la membrana; b) la adsorcion de polimeros en la membrana. Los metodos que emplean trazadores radiactivos para la investigacion de estos dos fenomenos ofrecen ventajas decisivas sobre los procedimientos gravimetricos clasicos, que son mucho menos sensibles. El polimero empleado por los autores consistio en una muestra heterodispersa de policloroacrilato de butilo obtenido por el oracion ionica del poliacrilato de butilo con {sup 36}Cl. Este polimero se utilizo disuelto en acetona. Los autores emplearon camaras de difusion, semejantes a osmomotros de celulas gemelas. La solucion quedaba separada del disolvente por membranas de celofan de permeabilidades de 6,7 x 10{sup -5} h{sup -1} a 30,6 x 10{sup -5} h{sup -1}. Han llegado a las conclusiones siguientes: a) con el aparato empleado en los experimentos de difusion, se precisan unas 200 horas para alcanzar un estado de equilibrio o un regimen estacionario; b) la fraccion de polimero que difunde a traves de la membrana en un tiempo determinado es independiente de la concentracion; c) la cantidad de polimero que se difunde depende de la permeabilidad de la membrana; d) se observa una adsorcion practicamente irreversible del polimero en la membrana (30 a 40 {mu}g cm{sup 2}). (author) [Russian] Pri izuchenii osmoticheskikh yavlenij s ispol'zovaniem vysokikh polimerov osoboe znachenie predstavlyayut dve prichiny oshibok: a) diffuziya nizkomolekulyarnykh polimerov cherez membranu; b) adsorbtsiya polimera na membrane. Dlya issledovaniya oboikh ehtikh yavlenij metod radioaktivnykh indikatorov predstavlyaet nesomnennye preimushchestva nad obychnymi i gorazdo menee chuvstvitel'nymi vesovymi metodami. V provedennykh avtorami doklada opytakh byl ispol'zovan geterodispersnyj obrazets polimera (poli)-khlorobutilakrilata, kotoryj byl khlorirovan s pomoshch'yu Cl{sup 36} posredstvom ionizatsii, iskhodya iz obraztsa (poli)-butilakrilata. Ehtot polimer rastvo- ryaetsya v atsetone. Byli postroeny diffuzionnye kamery, analogichnye dvuyacheechnym osmometram. Rastvor otdelyalsya ot rastvoritelya tselofanovymi membranami, obrabotannymi tak, chtoby davat' pronitsaemost' ot 6,7 x 10{sup -5} ch{sup -1} do 30,6 x 10{sup -5} ch{sup -1} Bylo najdeno, chto: a) s nashim oborudovaniem ponadobilos' okolo 200 chasov dlya togo, chtoby v opytakh diffuzii dostich' ravnovesiya ili ustojchivogo sostoyaniya; b) dolya polimera, diffundiruyushchaya cherez membranu v opredelennyj promezhutok vremeni, ne zavisit ot kontsentratsii; c) kolichestvo diffundiruyushchego polimera zavisit ot pronitsaemosti membrany; d) nablyudalas' pochti neobratimaya adsorbtsiya polimera na membrane (30-40 {mu}g/cm{sup 2}). (author)

  20. Heat treatment and gamma radiation effects on the physical-chemical, microbiological and sensory stability of pure sugarcane juice or added with fruit juices, stored under refrigeration;Efeitos do processamento termico e da radiacao gama na estabilidade fisico-quimica, microbiologica e sensorial de caldo de cana puro e adicionado de suco de frutas, armazenado sob refrigeracao

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Aline Cristine Garcia de

    2007-07-01

    Sugarcane juice is a taste drink, energetic, no alcoholic that conserves all the nutrients in cane sugar. It was very appreciated by the Brazilian population and its production has been shown to be a highly lucrative business. This research had the following objectives: evaluate the acceptance of the consuming market and the stability of pure sugarcane juice or added with natural fruit juices, submitted of heat treatment (70 deg C/ 25 min) and/ or gamma radiation (2,5 kGy) and stored in high density polyethylene bottles, under refrigeration (5 +- 1 deg C). Sugarcane juice market test was evaluated through the application of 350 questionnaires on six Sao Paulo cities. Sugarcane juice stability was evaluated through microbiological (psychotropic count, lactic bacteria and yeasts and molds count), physical-chemical (pH, color, titratable acidity, soluble solids, ratio and polyphenoloxidase activity) and sensory (hedonic test) parameters. Centesimal composition was determined analyzing: humidity, caloric value, total carbohydrates, total and reducing sugars, lipids, proteins, ascorbic acid, ash and minerals. Sugarcane juice shelf life period was determinate ever 7 days over a period of 42 days stored under refrigeration. The data were submitted to the variance analysis and compared by Tukey's test (p<0,05). Among the 350 interviewed people, more of the half one is interested about its habitual food safe and care about street foods. Sandwiches had been cited foods as routinely consumed, followed for the sugarcane juice and 'pastel'. Among the interviewed ones, 80% had mentioned to appreciate sugarcane juice. It had not correlation between age and school age and the preference for the consumption form was with lemon juice addition. About 55% of the interviewed ones had mentioned that would more frequently consume sugarcane juice processed and packed. Sugarcane juice processing did not modify the flavor and taste of the drink. It was concluded from the sensory analyses that the best mixture was that formulated with sugarcane juice and 4% of lemon juice as well as 10% of pineapple juice. Sugarcane juice centesimal composition was not altered by fruit juice concentration addition. However, sugarcane juice added with 10% pineapple juice incremented manganese and reducing sugars when compared with pure sugarcane juice and added with 4% lemon juice. The market test proffered mixture was shown to be that containing sugarcane juice and natural lemon juice for evaluation the shelf life. Sugarcane juice added with 4% of lemon juice submitted to gamma radiation, heat treatment combined with gamma radiation and heat treatment remaining satisfactory microbiological, sensory and physical chemical characteristics until 28, 35 and 42 days respectively, after processing. These results indicated that the heat treatment was effective for sugarcane juice preservation. (author)

  1. Dosimetry of radon, thorium and their progenies in the environment of a chemistry lab and crude in Zulia State, Venezuela; Dosimetria de radon, toron y sus progenies en el entorno de un laboratorio de quimica y crudo en el Estado Zulia, Venezuela

    Energy Technology Data Exchange (ETDEWEB)

    Pineda, L.; Viloria, T., E-mail: lendavaI22@hotmail.com, E-mail: lpineda@fing.luz.edu.ve, E-mail: tviloria63@yahoo.es [Universidad del Zulia, Maracaibo (Venezuela, Bolivarian Republic of). Departamento de Fisica; Palacios, D.; Sajo-Bohus, L., E-mail: sajobohus@gmail.com, E-mail: sanjuro.perdomo@gmail.com [Universidad Simon Bolivar, Caracas (Venezuela, Bolivarian Republic of). Laboratorio de Fisica Nuclear

    2013-07-01

    The main objective of this study was to estimate the dose rate of inhalation and the annual contribution of effective dose in the mixed field of radon and thoron in the environment of laboratory chemicals and oil from Zulia State, Venezuela, due to manipulation and storage of oil samples and water production.

  2. 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.

  3. A gestão de resíduos de laboratório na visão de alunos de um curso de graduação de quimica e áreas afins Waste laboratory management under the viewpoint of undergraduate students of a chemistry course and related areas

    Directory of Open Access Journals (Sweden)

    Zélia Therezinha Custódio Leite

    2008-01-01

    Full Text Available This work presents the students´ profile before and after working in the course "Laboratory Chemical Waste Treatment" in the last ten years. The structure of the course is also described. Although students have shown an increasing previous experience on waste management, many fundamental aspects are missing, especially knowledge on the directives focusing environmental aspects. Visits to industrial plants are also essential to better understand the impact of wastes in environment. Most students nowadays consider waste management as an essential part of their professional formation. A good waste management program must consider several topics of extreme relevance.

  4. Influence of the precursors in the chemical preparation of {gamma} - Al{sub 2}O{sub 3} in reactions of alcohols dehydration; Influencia de los precursores en la preparacion quimica de {gamma} - Al{sub 2}O{sub 3} en reacciones de deshidratacion de alcoholes

    Energy Technology Data Exchange (ETDEWEB)

    Salmones, J.; Limon, M.T.; Mayagoitia, V.; Rojas, F.; Kornhauser, I.; Morales, J.; Acosta, D. [Instituto Mexicano del Petroleo, Subdireccion General de Investigacion Aplicada, Apartado Postal 14-805, 07730, Mexico D.F. (Mexico)

    1998-12-31

    A chemical method for the synthesis of alumina substrates based on a microscopic morphological control, is presented. The influence of the precursor alcohol used for the synthesis of Al(OR){sub 3} is studied too. This latter compound is the raw material to synthesize the alumina materials treated here. The effects of alcohols such as ethanol, isopropanol and ter butanol are analyzed. Results show that an early formation (i.e. at low temperature) of the porous structure is reached in the case of {gamma} -Al{sub 2}O{sub 3} synthesized from ethanol. On the other hand, pore formation for alumina obtained from isopropanol and ter butanol, occurs until appearance of the {gamma} phase (at approximately 500 Centigrade). The different alumina substrates were used as catalysts in dehydration reactions of primary, secondary and tertiary alcohols. Decreasing catalytic activity corresponds to the sequence: (R-OH){sub 3} < (R-OH){sub 2} < (R-OH) in the case of ethanol; while for isopropanol and ter butanol the sequence is: (R-OH) < (R-OH){sub 2} < (R-OH){sub 3}. These results are explained by means of a reaction mechanism which is associated with the textural properties of the catalysts. (Author)

  5. La defensa de presos políticos a comienzos de los ´70: ejercicio profesional, derecho y política A defesa dos presos políticos no início dos anos 70: a prática profissional, o direito ea política The defense of political prisoners in the early '70s: professional practice, law and politics

    OpenAIRE

    Mauricio Chama

    2010-01-01

    El trabajo aborda la relación entre abogacía y política a comienzos de la década del '70. Más precisamente se propone identificar y reconstruir los principales rasgos que asume la defensa de presos políticos en ese período. Más que una labor específica, se entiende que la defensa de presos políticos en esos años representó una novedosa configuración que logró articular una nueva asociación de profesionales del derecho, renovadas estrategias de defensa, una vasta y sistemática labor de denunci...

  6. Atomic Energy Levels. As Derived From the Analyses of Optical Spectra. Volume 3

    Science.gov (United States)

    1958-05-01

    Quimica (Madrid) [Al 46, 328 (1952). (I P) K. 0. Kessler and R. E. Trees, Phys. Rev. (2) 32, 303 (1953). (hfs) H. E. Walchii, A Tab/ of Nuclear .omena Data...I and 11. ________ 6. Reference 111 H. E. Walchli, A Tabl of Nuclear Momenti Data, Oak Ridge [101 R. T. Birge, Rev. Mod. Phys. 13, No. 4, 237 (1941...to (141 M. A. Catalin y R. Velasco, An. Real Soc. Foip. Fillica y Ac, in press (1958). Quimica (Madrid) [A] 48, 247 (1952). 161 C. E. Moore

  7. International Conference on Photochemistry (15th) Abstracts of Invited Lectures and Oral and Poster Contributions Held in Paris, France on 28 July-2 August 1991 (XVeme Conference Internationale de Photochimie, Paris, France 28 Juillet-2 Aout 1991)

    Science.gov (United States)

    1991-08-01

    M. Novo, C. Rios, F. Rodrlguez PrIelo Dpto. Quimica Fisica. Universidad de Santiago. E-15706 Santiago de Compostela. SPAIN. Ground- and excited-state...Sebastiao J. Formosinh Jo~o S. Brancod), and M. Mendes M.M. Fernandes a ) a) Instituto Superior de Engenharia de Coimbra,3000-Coibra,Portugal b) Department of...Braslavskyl, and Kurt Schaffner i I 3Max-Planck-Institut far Strahlenchemie, D.4330 M~lhem a.d. Ruhr, Stiftstrafle 34- 36, FRG. ’ Departamento de QuImica

  8. Síntese da 5-metil-2-oxabiciclo[3.3.1]nom-7-eno-3,6-diona.Determinaçăo estrutural de uma lactona bioativa isolada de otoba parvifolia /

    OpenAIRE

    Lenz, Cesar Antonio

    2003-01-01

    Orientador: Francisco de Assis Marques Tese (doutorado) - Universidade Federal do Paraná, Setor de Cięncias Exatas, Programa de Pós-Graduaçăo em Química. Defesa: Curitiba, 2003 Inclui bibliografia

  9. International Symposium on Gas Kinetics (9th) Held in Bordeaux, France on 20-25 July 1986. Abstracts

    Science.gov (United States)

    1986-07-25

    versidad a Distancia, Ciudad Universitaria, 28040 Madrid. 3.M. Fiquera, J. Medina and 3.C. Rodriguez, Int de Quimica Fi sica "Rocasolano", CSIC, Serrano...inhibition. N J3 By making sensible (we hopel) assumptions about the reactivity of C 2115 towards allylic It, we estimate for 798 K and 50 Torr n-hexane

  10. Localization and Specification of Copper Ions in Biofilms on Corroding Copper Surfaces.

    Science.gov (United States)

    1994-01-01

    Sao Paulo, Brazil: Aquatec Quimica : 1985). 256/3 5. H. Shih, F. Mansfeld, ASTM STP 1154, 174, Philadelphia, PA, 1992. 6. B. Little, P. Wagner, R...Pope, "A Study of Microbiologically Influenced Corrosion in Nuclear Power Plants and a Practical Guide for Countermeasures," Electric Power Research

  11. Sol-Gel Optics: Proceedings SPIE-The International Society for Optical Engineering Held in San Diego, California on 11-13 July 1990. Volume 1328

    Science.gov (United States)

    1992-03-01

    important for optical devises used in such environment as nuclear power stations and space stations. Fig. 9 shows the y-ray dose dependence of the coupling...Bi 2 0 3 and TiO2-CeO 2 Compositions. Michel A. Aegerter, Eliane R. La Serra University of Sao Paulo, Instituto de Fisica e Quimica de Sao Carlos

  12. Molecular Recognition in the Oxidation of Catechols by Dicobalt-BISDIEN Dioxygen Complexes

    Science.gov (United States)

    1992-01-30

    Recognition in the Oxidation of Catechols by Dicobalt-RISDIEN Dioxygen Complexes Lizete F S Cezar and Bruno Szpoganicz Departamento de Quimica ...bridged bi- nuclear Co(II)-BISDIEN dioxygen complexes; Co20 2 LCat2 + is the bivalent form, and Co20 2 (OH)LCat + and Co 20 2 (OH)2 Cat° are hydroxo

  13. International Symposium on Solubility Phenomena (3rd) Held in Guildford, Surrey England on 23 - 26 August 1988

    Science.gov (United States)

    1988-08-26

    solubilities is, first of all, important for metallurgy, electrochemistry, nuclear and space technology. Experimental solubilities of metals in liquid Hg...Dianderas de Acosta and I.FernAndez Paz Departamento de Quimica Universidad Nacional de San Agustin, Arequipa, Peru Equilibria and derived free

  14. Soldier-Portable Battery Supply: Foreign Dependence and Policy Options

    Science.gov (United States)

    2014-01-01

    private firm, the Sociedad Quimica y Minera (SQM) de Chile. Across the border in Bolivia, the Salar de Uyuni, which is the largest salt flat in the...on analyzing the U.S.-China military balance, as well as developing strategies for dealing with nuclear -armed regional adversaries and performing an

  15. Dynamics of Electron Transfer for a Nonsuperexchange Coherent Mechanism. I

    Science.gov (United States)

    1989-10-13

    observation. In the treatment three collective nuclear coordinates are introduced, permitting independent reorganization energies for each reactive center... nuclear coordinates are introduced, permitting independent reorganization energies for each reactive center. With certain approximations, namely, equal...numerically. One rough but simple analytical result for the latter is also given. tPresent address: Departmento de Quimica , Facultad de Ciencias

  16. Binding of Pentaammineruthenium(II) Residues to the Tris(bipyrazine)ruthenium(II) Cation.

    Science.gov (United States)

    1987-08-01

    de Quimica , Universidade de Sao Paulo, CP 20780, Sao Paulo, SP, Brazil and Department of Chemistry, York University, North York, Ontario, Canada M3J...absorption spectra in the near-infrared region were obtained with a Cary 1 7 spectrophotometer, with the samples dissolved in D20. Nuclear magnetic

  17. Theoretical Crystal-Field Calculations for Rare-Earth Ions in III-V semiconductor Compounds

    Science.gov (United States)

    1991-10-01

    22209 Director Director US Army Electronics Warfare Laboratory Defense Nuclear Agency Attn AMSEL-DD Attn Tech Library Attn AMSEL-DD, J. Charlton 6801...Washougal, WA 98671 Attn SLCHD-NW-TN, Chief Attn SLCHD-NW-TS, Chief Departmento Quimica Fundamental Attn SLCHD-PO, Chief Universidade Federal de

  18. Interfacial Effects and Organization of Inorganic-Organic Composite Solids.

    Science.gov (United States)

    1998-05-20

    alkoxide are examined by liquid state 29Si nuclear magnetic resonance)NMR) spectroscopy. The morphology of the coating is dependent upon chemical...Lopez, Univ de Malaga, Dept d* Quimica Inorganica, CnatalograAa It Mineralogia Malaga, SPAIN; Deborah Jones, Univ de Montpellier II, Lab dei

  19. Particle Flux in the Western Black Sea in the Present and over the Last 5,000 Years: Temporal Variability, Sources, Transport Mechanisms.

    Science.gov (United States)

    1987-09-01

    unit i in the deep basil o,’res is 263 rm. Thus, based on this calculation the annua! deposition at the suGre sites is on average 4.7 times higher than...AAS) y espectrografia de emision (OES): Anales de Quimica, v. 81, p. 48-55. % %. -131- Baumgartner, T., V. Ferreira-Bartrina, H. Schrader, and A

  20. A Simple DWBA (’Franck-Condon’) Treatment of H-Atom Transfers between Two Heavy Particles.

    Science.gov (United States)

    1984-07-02

    integral over the reactants’ and products’ wavefunctions and the interaction potential. )Permanent address: DIpartarnento de Quirnica Fisica y Quimica... Cuantica , USniversidad Autonomna de Madrid, Cantoblanco. Madrid-34, Spain. blContribution No. 7020. -2- The reactants’ and products’ wavelunctions

  1. 1738-IJBCS-Article-Saw Yaya

    African Journals Online (AJOL)

    hp

    the “Instituto de Quimica, -(U.N.A.M),. Mexico” - while Mössbauer spectra were obtained as described previously (DE Sousa et al., 2006). The infrared spectra were obtained with FTIR spectrometer, the samples being as. KBr pellets. Infrared data are given in cm-1. IR abbreviations: (vs) very strong, (s) strong, (m) medium ...

  2. Journal of Biosciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    1 Fernando Ibañez1 Lucio Valetti1 Vanina Muñoz1 María Soledad Anzuay1 Liliana Ludueña1 Adriana Fabra1. Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-quimicas y Naturales, Universidad Nacional de Río ...

  3. Measurements of sulfur dioxide, ozone and ammonia concentrations in Asia, Africa, and South America using passive samplers

    CSIR Research Space (South Africa)

    Carmichael, GR

    2003-03-01

    Full Text Available : gcarmich@engineering.uiowa.edu (G.R. Carmichael). 1352-2310/03/$ - see front matter r 2003 Elsevier Science Ltd. All rights reserved. doi:10.1016/S1352-2310(02)01009-9 ac Chemistry Istitute Departmento de Quimica Analitica, Universidade Federal da Bahia...

  4. International Conference on Internal Friction and Ultrasonic Attenuation in Solids (ICIFUAS) (10th) held in Roma, Italy on September 6 - 9, 1993

    Science.gov (United States)

    1993-09-09

    Flortncio 3. H. Tejima 3 , J.A.R. Jordao3 (1) Depto de Fisica, UNESP, Bauru, SP, Brazil. (2) Depto Engenharia Mateiais, UFSCar. Sao Carlos, SP, Brazil. (3...At6mica, Dto. de Quimica de Reactores, Av. del Libertador 8250, (1429) Buenos Aires, Argentina. (3) Universidad de Buenos Aires, Facultad de Ciencias

  5. Source Hierarchy List. Volume 3. O through Z

    Science.gov (United States)

    1994-07-01

    UNIVERSIDAD NACIONAL DE CORDOBA 387102 (ARGENTINA) 01 UNIVERSIDAD NACIONAL DE CORDOBA 4O5530 (ARGENTINA) INSTITUTO DE CIENCIAS QUIMICAS ...UNIVERSIDADE ESTADUAL DE CAMPINAS 426597 (BRAZIL) 01 UNIVERSIDADE ESTADUAL DE CAMPINAS (BRAZIL) FACULDADE DE ENGENHARIA * 5133 398130 UNIVERSIDADE...UNIVERSIDADE FEDERAL DE SAD CARLOS 420497 (BRAZIL) 01 UNIVERSIDADE FEDERAL OE SAO CARLOS (BRAZIL) OEPT OE ENGENHARIA DE MATERIALIS

  6. Materials for Energy Conversion and Environmental Protection

    Science.gov (United States)

    2004-10-13

    electrochemistry group, head of the inorganic chemistry department, and a member of the Instituto de Quimica -Fiscia de los Materiales, Medio Ambiente y...at Worcester Polytechnic University and received his B.S. in chemical engineering in1982 from the Instituto Militar de Engenharia (Brazil), and his

  7. Planetary Conjunction: Economics, Politics, and Partnering In Space

    Science.gov (United States)

    2013-06-01

    Andrade Gutierrez Quimica Ltda, Centro Tecnico Aerospacial, Empresa Brasileira de Telecomunicacões, Instituto de Aeronautica e Espaco, and Instituto...Activity (EVA) During Space Transportation System (STS) -82, a Servicing Mission for the Hubble Space Telescope (HST).........................33 13...responsible for the solar array that would power Hubble while in orbit.63 Figure 12: An Extravehicular Activity (EVA) During Space Transportation

  8. (AJST) DETERMINATION DE LA QUALITÉ DU PAIN DE SUCRE A ...

    African Journals Online (AJOL)

    RÉFÉRENCES. Arguello-Morales, M., Sanchez-Gonzales, M., Canedo, M.,. Quirasco, M., Farres, A., Lopez-Munguia, A., (2005),. Proteolytic modification of Leuconostoc mesenteroides B-512F dextransucrase, Antonie Van. Leewenhoek, 87(2):131-141. Badui, J.D.S., (1995), Quimica de alimentos, 3a edicion,. 62-65, Edition ...

  9. Original Research Original Research

    African Journals Online (AJOL)

    RAGHAVENDRA

    Argon, G.T. (1986). Estudo geoquimico de metais pesados em sediments da planicie de mare da Enseada das. Garcas. Baia de Sepetiba. RJ.T.Mest., Inst. Quimica,. Univ.fed. Fluminense. 135. Berrow, M.L. and Stein, W.M. (1983). Extraction of metals from soils and sewage by refluxing with aqua regia. Analyst 108: 277-285 ...

  10. Human immunodeficiency virus (HIV) seropositivity and hepatitis B ...

    African Journals Online (AJOL)

    Method: A total of 130 donors comprising 120 commercial donors and 10 voluntary donors were tested for antibodies to human immunodeficiency virus and hepatitis B surface antigen in Benin city using Immunocomb HIV - 1 and 2 Biospot kit and Quimica Clinica Aplicada direct latex agglutination method respectively.

  11. Metal–selenium interactions. Crystal structure of binuclear [( 1η-iodo ...

    Indian Academy of Sciences (India)

    Unknown

    2Departmento de Quimica Inorganica, Facultade de Farmacia, Universidade de Santiago, 15706, Santiago, Spain e-mail: tarlok@angelfire.com. MS received 11 September 2000; revised 13 November 2000. Abstract. Reaction of mercury(II) diiodide with triphenyl selenophosphorane–Se. (1:1 mole ratio) in acetone followed ...

  12. JPRS Report, Proliferation Issues

    Science.gov (United States)

    1992-06-25

    control of INGTON POST saying: "Secretary of Defense Richard Nuclemon Minero Quimica Ltda. [Nuclebras Monazite and Cheney approved the Pentagon’s plan ... Planned [Alm a-Ata Radio] .................................................................................................. 26 Krasnoyarsk Search for...34 [Article by political staff: "Space plan defended"] He said the aim of the investigation was to determine the market opportunities, risks and

  13. NEWS: Conference diary

    Science.gov (United States)

    2000-03-01

    18 - 20 October 2000 Santa Fe, Argentina 5th Symposium of Investigators in Physics Education. Info: Ing Cristina Camara, GIDEAF Departamento de Fisica, Facultad de Ingenieria Quimica - UNL, Santiago del Estero 2829, 3000 Santa Fe, Argentina (ccamara@fiqus.unl.edu.ar or www.unl.edu.ar/sief5 )

  14. Characterization of magnetic nano particles of CoFe{sub 2}O{sub 4} and CoZnFe{sub 2}O{sub 4} prepared by the chemical co-precipitation method; Caracterizacion de nanoparticulas magneticas de CoFe{sub 2}O{sub 4} y CoZnFe{sub 2}O{sub 4} preparadas por el metodo de coprecipitacion quimica

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, J.; Zambrano, G.; Gomez, M. E. [Universidad del Valle, Departamento de Fisica, Laboratorio de Peliculas Delgadas, Ciudad Universitaria Melendez, 25360 Cali (Colombia); Prieto, P. [Universidad del Valle, Centro de Excelencia en Nuevos Materiales, Ciudad Universitaria Melendez, 25360 Cali (Colombia); Espinoza B, F. J., E-mail: javierlo21@gmail.com [IPN, Centro de Investigacion y de Estudios Avanzados, Unidad Queretaro, Libramiento Norponiente No. 2000, Fracc. Real de Juriquilla, 76230 Queretaro (Mexico)

    2012-07-01

    Magnetic cobalt ferrite nanoparticles of CoFe{sub 2}O{sub 4} and CoZnFe{sub 2}O{sub 4} were prepared by co-precipitation technique from aqueous salt solutions of Co (II), ZnSO{sub 4} and Fe (III), in an alkaline medium. CoFe{sub 2}O{sub 4} powder samples were structurally characterized by X-ray diffraction, showing the presence of the most intense peat at 2{theta} = 413928{sup o} (Co K{alpha}1) corresponding to the (311) crystallographic orientation of the CoFe{sub 2}O{sub 4} spinel phase. The mean size of the crystalline of CoFe{sub 2}O{sub 4} and CoZnFe{sub 2}O{sub 4} nanoparticles determined from the full width at half maximum of the strongest reflection of the (311) peak by using the Scherrer approximation was calculated to be 11.4 and 7.0 ({+-} o.2) nm, respectively. Transmission electron microscopy studies permitted determining nanoparticle size of CoZnFe{sub 2}O{sub 4}. Fourier transform infrared spectroscopy was used to confirm the formation of Fe-O bonds, allowing identifying the presence of ferrite spinel structure. Magnetic properties were investigated with the aid of a vibrating sample magnetometer at room temperature Herein, the sample showed superparamagnetic behavior, determined by the hysteresis loop finally, due to the hysteresis loop of the CoZnFe{sub 2}O{sub 4} is very small, our magnetic nanoparticles can be considered as a soft magnetic material. These magnetic nanoparticles have interesting technological applications in biomedicine given their biocompatibility, in nano technology, and in ferro fluid preparation. (Author)

  15. A fundação de periódicos literários no terceiro quartel do século XIX: em defesa da literatura ou em prol da política e da educação? = La fundación de periódicos literarios en el tercer cuarto del siglo XIX: ¿en defensa de la literatura o a favor de la política y de la educación? = The foundation of literary periodicals in the third quarter of the nineteenth century: literature promotion or a political and educational agenda?

    Directory of Open Access Journals (Sweden)

    Baleiro, Rita

    2013-01-01

    Full Text Available O artigo apresenta 8 textos-fundação de periódicos literários portugueses (1855-1865. Pretende estudar as publicações nascidas durante a polémica literária portuguesa – a Questão Coimbr㠖 e, aplicando análise de texto detalhada, analisar: a a linha editorial das publicações; b a relação estabelecida com os leitores; c para que público(s escreviam? A análise regista uma preocupação didática, reflexo do contexto socio-histórico de promoção da instrução pública, quando mais de 70% da população era analfabeta e, em alguns casos, para o estreitamento de relações com o Brasil

  16. Páginas de colectivos LGBT portugueses

    Directory of Open Access Journals (Sweden)

    Ana Cristina Santos

    2012-10-01

    Full Text Available Associação Cultural Janela Indiscreta: http://www.lisbonfilmfest.org/ AT – Associação para o Estudo e Defesa dos Direitos à Identidade de Género: http://a-trans.planetaclix.pt/ Clube Safo: http://www.clubesafo.com/ ILGA Portugal: http://ilga-portugal.oninet.pt/ não te prives – Grupo de Defesa dos Direitos Sexuais: http://www.naoteprives.org/ Opus Gay: http://www.opusgay.org/ Panteras Rosa – Frente de Combate à LesBiGayTransfobia: http://www.panterasrosa.com/ Ponto Bi: http://www.pontobi....

  17. Violência contra a mulher e a Lei Maria da Penha

    OpenAIRE

    Ingnácio Duarte, Jozi Rubia; Univesidade Estadual de Londrina (UEL), Londrina; Duarte Pinheiro, Ana Claudia; UEL; Lobo Muniz, Deborah Lídia; UEL; Brun, Simone; UEL

    2009-01-01

    O presente artigo tem como objetivo adentrar no campo jurídico da defesa da mulher brasileira, contra a violência dos mais variados tipos que ela vem sofrendo com o passar dos tempos, analisa a legislação vigente bem como as práticas jurídicas em defesa da mulher e o impacto da lei Maria da Penha. This article aims to enter the field of legal defense of Brazilian women, against violence of all kinds which it has suffered over time, analyzes the current legislation and legal practices in fa...

  18. A perda do objeto da ação direta de inconstitucionalidade : mudança de paradigma procedimental tendo em vista a supremacia do texto constitucional

    OpenAIRE

    Rodrigo Freitas de Santana

    2013-01-01

    O presente trabalho tem o objetivo inicial de analisar o controle de constitucionalidade quanto ao seu modo de atuação como sistema de defesa do texto constitucional face aos atos normativos que integram o ordenamento jurídico brasileiro, estudando suas espécies a partir de vários critérios, bem como analisar os órgãos competentes pelo seu exercício e sua forma de atuação no contexto do referido sistema de defesa. O presente trabalho busca também estudar de forma mais detalhada o controle abs...

  19. European Science Notes Information Bulletin Reports on Current European/ Middle Eastern Science

    Science.gov (United States)

    1991-03-01

    carbon-fibre- reinforced plastic Centro de Quimica Fisica Molecular P composites Deutsche Forschungsanstalt fur Luft-Und Raumfahrt (DLR), K61n-Porz D...technology R&D is a significant part of this program, Nuclear and Renewable Energies (ENEA), and eight funded at about DM 550 ($314.3 million). Coal... nuclear powerplants. The process is being and to experimentally employ new communication tested in a plant of industrial scale where the resins are

  20. Thin Metallic Films from Solvated Metal Atoms.

    Science.gov (United States)

    1987-07-14

    Departamento de Quimica , Universidad de Concepcion, Cassilla 3-:, c oncepcion, Chile. -I{ - ~ *~.’JS*~M 4 .~4\\ 821 19 the gold particles were negatively...1:i, 7 J. AdpI. Radiat. s toD.. 21(l),36-8 (1970). 12. L. G. Colombetti, D. A. Goadwin, and R. J. Hermanson, Nuclear Aed. 10, 597-6u2. (1C69). 13. L

  1. Problem Definition Study on TAX (1-acetylhexahydro-3,5-dinitro-1,3,5- triazine), SEX (1-acetyloctahydro-3,5,7-trinitro-1,3,5,7-tetrazocine), Lead Salicylate and Lead Beta-Resorcylate 2-Nitrodiphenylamine and Ethyl Centralite

    Science.gov (United States)

    1979-07-01

    IV-14 IV-3. Nuclear Magnetic Resonance Spectrum of 2-Nitrodiphenylamine ................. IV-15 IV-4. Map of Radford Army Amumunition Plant...Chemie GmbH Chemische Werke Munchen Otto Barlocher CmbH Metallgesellschaft AG ITALY Stabilital SpA SPAIN Industrias Quimicas de Parets. SA UNITED KINGDOM...abnormal cristae and matrix, and disrupted nuclear membrane. The mitochrondria seemed to be the organelle most frequently affected. Thus, it was shown that

  2. Symposium Q: Magnetic Thin Films, Heterostructures, and Device Materials

    Science.gov (United States)

    2007-05-22

    ing, and applications. version, hydrogen, and nuclear research. Examples of extended functionality of In addition to the presentations on government...and the pure Fe is bcc phase. United States Department of Energyi National Nuclear Security From these evidences, it indicates that the laminates form...in the regions where the self assembled monolayer is polar in Escudero3; ’Centro de Investigacion en Quimica Aplicada, Saltillo, nature, and it is non

  3. Lipopolysaccharide Antigens of Pseudomonas aeruginosa and Design of Novel Vaccines.

    Science.gov (United States)

    1987-09-01

    Studies on the Lipopolysaccharide Antigens of Seven Immunotypes of P a_ n , SELAQ, Proc. 3 VL Seminario Latinoamericano J1 Quimica , pp. 143-159 (1979). 7...Bioolymers, 19 (1980) 1801-1814. 74" , 8. Derek Horton and David A. Riley, Phosphorus-31 Nuclear Magnetic Resonance Spectroscopy of Lipopolysaccharides...Amer. Chem. Soc., 87 (1965), 1345-1353. 40. D. Horton and D. A. Riley, "Phosphorus-31 Nuclear Magnetic Resonance Spectroscopy of Lipopolysaccharides

  4. Microbiologically Influenced Corrosion in Copper and Nickel Seawater Piping Systems

    Science.gov (United States)

    1990-09-01

    Influenced Tipton, D. G. and Kain, R. M. 1980. Effect of temperature onCorosiope in Nuclear Power Plants atudy a Mical Gnuide the resistance to pitting of...Monel alloy 400 in seawater. In:Corrosion in Nuclear Power Plants anda Practical ie fr Proceedings of Corrosion 󈨔. Chicago, Illinois: National...Sons Ltd. 441 pp. Quimica . Verink, E.D. and Pourbaix, M. 1971. Use of electrochemical Pope, D. H., Duquette, D. J., Johannes, A. H., and Wayner

  5. Colloquium on High Resolution Molecular Spectroscopy (16th) Held in Universite de Bourgogne, Dijon, France on 6-10 September 1999

    Science.gov (United States)

    1999-09-28

    Chimica Fisica e Photophysique Mol6culaire, Physikalische Chemnie, Inorganica, Universit6 de Paris-Sud, ETH Zentrum, Universitý, de Bologna, Orsay... de la Materia, Consejo Superior de Investigaciones Cientificas, Serrano 123, 28006 Madrid, Spain; C. CLAVEAU and A. VALENTIN, Laboratoire de Physique...Cedex, France; J. C. LOPEZ and S. BLANCO, Departamento de Quimica- Fisica , Facultad de Ciencias, Universitad de Valladolid, 47071 Valladolid, Spain; A

  6. International Conference on Chemical Kinetics: Program and Abstracts Held in Gaithersburg, Maryland on 17-19 June 1985.

    Science.gov (United States)

    1985-06-01

    Salamanca Dpto. Fisica Teorica and University Complutense Dpto. Metodos Matematicos de la F1sica The authors show how the knowledge of (n-1) first...M. Dominguez. Centro de Quimica, Instituto Venezolano de Investigaciones Cientificas Caracas 1010-A. Venezuela. The kinetics of the gas phase...Alexandra Rotinov, Rosa M. Domfnguez, and Ignacio Martin Centro de Qufmica, Instituto Venezolano de Investigaciones Cientificas (I.V.I.C.), Caracas

  7. International Symposium (43rd) on Molecular Spectroscopy Held in Ohio State University on 13-17 June 1988.

    Science.gov (United States)

    1988-06-01

    Superior de Investigaciones Cientificas, c/Serrano, 119, 28006 Madrid, Spain. TG7. ON THE ASSIGNMENT OF THE EXCITED SINGLET STATES IN THE CO. MOLECULE...Departmento de Quimica Fisica , Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain; and R. H. TIPPING, Department of Physics and Astronomy...Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, C/ Serrano, 119, 28006 Madrid, SPAIN. ’-. (2:𔃻) ON THE ASSIGNMENT

  8. Recursos humanos para novos cenários Human resources for new scenarios

    Directory of Open Access Journals (Sweden)

    Angelo C. Pinto

    2009-01-01

    Full Text Available The Brazilian Chemical Society - SBQ has made substantial contributions to the formation of qualified human resources at all levels since its foundation in 1977. Several papers addressing this subject have been published in Quimica Nova by different authors over the last years. In this paper, we discuss the present need for "Curriculum Guidelines" for undergraduate education in Chemistry with actions to be taken in accord with the Principles of Green Chemistry and Sustainability.

  9. Proceedings of US-Latin American Workshop on Molecular and Materials Sciences: Theoretical and Computational Aspects Held in Gainesville, Florida on 10-12 March 1993

    Science.gov (United States)

    1994-08-09

    QUJANTM OIGMI CAL CALCULATI OCS APPLI ED TO A RAT7 ONAL DESIGN OF METAL CATALYSTS. Guillermina Lucia EstiO. Proyecto Qui nor. Facultad de Ciencias ...Necanica Cuantica Aplicada (CNCA). Facultad do Ciencias , Universidad de Chile, Casilla 653-Santiago Chile. Keywords : Ion Solvation Isoelectronic Processes...Vmnezolano de Invetigaciones Cientificas (MC), Apartado 21827, Caracas 1020-A, Venmeuela and Escuela do Quimica, Facultad de Ciencias , Universidad

  10. 20th International Conference on Solid State Ionics (SSI 20)

    Science.gov (United States)

    2016-05-20

    Italy; 2CNST @PoliMI, Istituto Italiano di Tecnologia , Milano, Italy; 3Physical Chemistry of Solids, Max Planck Institute for Solid State Research...Coughlin5; 1Chemical Sciences, University of Padova, Padova, Italy; 2Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali...Germany; 2Instituto de Tecnologia Quimica , Valencia, Spain; 3Ernst Ruska Center, Jülich, Germany. 4:50 PM J5.05 Hydrogen Permeation through CO2-Stable

  11. A IMPORTÂNCIA DA SOCIEDADE BRASILEIRA DE QUÍMICA NA PÓS-GRADUAÇÃO EM QUÍMICA NO BRASIL

    Directory of Open Access Journals (Sweden)

    Aldo J. G. Zarbin

    Full Text Available The role of the different actions headed by the Brazilian Chemical Society (SBQ for the development of the Graduate Programs in Chemistry in Brazil is highlighted herein. Specifically, the importance of the SBQ journals, such as the Quimica Nova (QN, Journal of the Brazilian Chemical Society (JBCS and Revista Brasileira de Química (RVQ as vehicles to disseminate the knowledge produced by the different graduate programs in chemistry is demonstrated.

  12. Brazil, the United States, and the Missile Technology Control Regime

    Science.gov (United States)

    1990-03-19

    Pursues Dream in Space," Washington Post, 13 December 1984, lf, 4f. According to Defense News, "Brazil’s Andrade Gutierrez Quimica produces ammonium...owned by Engesa (EnQenheiros Especializados S.A. - 40 percent), Embraer (Empresa Brasileira de Aeronautica S.A. - 40 percent), Esca ( Engenharia de...AeronAutica S.A. EMFA - Estado Maior das Forcas Armadas (General Staff of the Armed Forces) Engesa - Engenheiros Es~ecializados S.A. Esca - Engenharia de

  13. International Symposium on Applications of Laser Techniques to Fluid Mechanics (7th) Held in Lisbon, Portugal on July 11-14, 1994. Volume 1

    Science.gov (United States)

    1994-07-14

    CHARACTERISTICS OF LOW MOLECULAR WEIGHT SHEAR-THINNING FLUIDS A. S. Pereira Departamento de Engenharia Quimica , Instituto Superior de Engenharia do Porto Rua...de S.Tom6. 4200 Porto CODEX. Portugal F. T. Pinho Departamento de Engenharia Mecinica e Gestio Industrial Faculdade de Engenharia , Rua dos Bragas. 4099...turbulence Investiga•:’o Cientifica- INIC. INEGI (lnstituto de Engenharia characteristics of the low molecular weight polymers are Mec~nica e Gestio

  14. Proceedings of the Annual Conference on Magnetism and Magnetic Materials (38th) Held at Minneapolis, Minnesota on 15-18 November 1993. (Journal of Applied Physics. Volume 75, Number 10, Part 28

    Science.gov (United States)

    1994-05-15

    Spain E. Irurieta, J. Gonzilez, and K. Kulakowskia) Departamento de Fisica de Materiales, Facultad de Quimicas , Universidad del Pais Vasco, 20009...Ishikawa, and Doyle H Short period oscillation of the interlayer exchange coupling in sputtered Co-Re superlattices J. L. Leal Instituto de Engenharia de...1699 Lisbon, Portugal P. P Freitas Instituto de Engenharia de Sistemas e Computadores, R. Alves Redol, 9-1, 1000 Lisbon, Portugal and Instituto Superior

  15. 2-[3-Furyl(hydroxy)methyl]-2,3-dimethylcyclohexanone.

    Science.gov (United States)

    García, Esther; Mendoza, Virgilio; Guzmán, José Agustín; Maldonado Graniel, Luis Angel; Hernández-Ortega, Simón

    2002-06-01

    Contribution No. 1750 of the Instituto de Quimica, UNAM, Mexico. In the molecule of the title compound, C(13)H(18)O(3), there is a syn relationship between the two vicinal methyl groups. The six-membered ring adopts a chair conformation, with one equatorial and two axial groups, and the furyl group is almost parallel to the ketone group. Intermolecular hydrogen bonds [O[bond]H...O[double bond]C 2.814 (3) A] form chains along [100].

  16. Comportamento parental de Brachyteles hypoxanthus (Kuhl 1820) (Primates - Atelidae) na estação biológica de Caratinga - MG /

    OpenAIRE

    Souza, Karynna Tolentino de

    2007-01-01

    Orientador : Fernando C. Passos Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia. Defesa: Curitiba, 2007 Inclui bibliografia e anexos Area de concentração: Zoologia

  17. TERCEIRO SETOR E MEIO AMBIENTE

    OpenAIRE

    MELO, MARINA FÉLIX DE

    2012-01-01

    Objetivamos discutir, brevemente, como têm se dado as discussões sobre o Terceiro Setor brasileiro e, particularmente, sobre as ONGs que atuam em defesa do meio ambiente, levantando questionamentos acerca das limitações enfrentadas pelo Terceiro Setor neste contexto

  18. Avaliação de rugas cutâneas da região periorbital baseada em processamento digital de imagens /

    OpenAIRE

    Brand, Vinicius Cubas

    2007-01-01

    Orientador: Hélio Pedrini Co-orientador: José Hermênio C.Lima Filho Inclui apêndice Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciencias Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 2007 Inclui bibliografia

  19. Robert S(trange McNamara (junho de 1916 a julho de 2009: a ascensão imperfeita da tecnocracia

    Directory of Open Access Journals (Sweden)

    Virgílio Caixeta Arraes

    2009-08-01

    Full Text Available o artigo trata da biografia de Robert McNamara,
    falecido em julho de 2009. Ele foi Secretário de Defesa durante a gestão de John Kennedy e Lyndon
    Johnson. Nesse sentido, ele foi um dos responsáveis
    pelo fracasso da Guerra do Vietnã.

  20. Prevalência pontual de Demodex canis e de demodicose em parcela da população canina na cidade de Guarapuava - Paraná /

    OpenAIRE

    Gueretz, Juliano Santos

    2005-01-01

    Orientador: Waldir Hamann Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Ciencias Veterinárias. Defesa: Curitiba, 2005 Inclui bibliografia Área de concentração: Patologia veterinária

  1. Propagaçăo vegetativa de pupunheira (Bactris gasipaes H.B.K.) a partir de perfilhos /

    OpenAIRE

    Tracz, Anderson Luiz Augusto

    2005-01-01

    Orientador: Marguerite Quoirin Co-orientador: Ivar Wendling Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Agrárias, Programa de Pós-Graduaçăo em Agronomia. Defesa: Curitiba, 2005 Inclui bibliografia e anexos Área de concentraçăo: Produçăo vegetal

  2. Historia natural de Trachycephalus mesophaeus (Hensel, 1867) (Anura : Hylidae) no Parque Florestal do Rio da Onça, municipio de Matinhos, estado do Parana /

    OpenAIRE

    Silva, Mitzi Oliveira da

    2006-01-01

    Orientador : Prof. Titular Vinalto Graf Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia. Defesa: Curitiba, 2006 Inclui bibliografia Area de concentração: Zoologia

  3. Estratégias colaborativas e competitivas nos processos de comercialização na cadeia produtiva da soja na região de Assaí

    OpenAIRE

    Tutida, Lincoln

    2009-01-01

    Orientador: Sergio Bulgacov Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciencias Sociais Aplicadas, Programa de Pós-Graduação em Administração. Defesa: Curitiba, 26/03/2009 Inclui bibliografia e anexo Área de concentração: Estratégia e organizações

  4. Educação ecológica por meio da estética na Pedagogia Waldorf /

    OpenAIRE

    Bach Júnior, Jonas

    2007-01-01

    Orientadora: Andréia A. Marin Inclui apêndice Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Educação, Programa de Pós-Graduação em Educação. Defesa: Curitiba, 2007 Inclui bibliografia e anexo

  5. Poluiçăo hídrica por dejetos de suínos : um estudo de caso na área rural do Município de Quilombo, Santa Catarina /

    OpenAIRE

    Assis, Fabiola Oro

    2006-01-01

    Orientadora: Ana Maria Muratori Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias da Terra, Programa de Pós-Graduaçăo em Geografia. Defesa: Curitiba, 2006 Inclui bibliografia e anexos Área de concentraçăo: Espaço, sociedade e ambiente

  6. Fenômenos de transporte no escoamento de misturas de gases rarefeitos /

    OpenAIRE

    Kalempa, Denize

    2005-01-01

    Orientador: Felix Sharipov Inclui apęndice Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Exatas, Programa de Pós-Graduaçăo em Física. Defesa: Curitiba, 2005 Inclui bibliografia

  7. Solução de problemas de fenômenos de transporte pelo método de Monte Carlo /

    OpenAIRE

    Kaviski, Eloy

    2006-01-01

    Orientadora : Liliana Madalena Gramani Cumin Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciencias Exatas e Setor de Tecnologia, Programa de Pós-Graduaçao em Métodos Numéricos em Engenharia. Defesa: Curitiba, 2006 Inclui bibliografia Área de concentração: Programação matemática

  8. Mecanismos de ação envolvidos nos efeitos da Bardana (Arctium lappa L.) sobre o trato gastrointestinal /

    OpenAIRE

    Santos, Ana Cristina dos

    2007-01-01

    Orientadora : Maria Consuelo Andrade Marques Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Farmacologia. Defesa: Curitiba, 2007 Inclui bibliografia

  9. Avaliação de pacientes com distrofia muscular de Duchenne através de testagem neuropsicológica e do potencial evocado cognitivo (P300) /

    OpenAIRE

    Della Coletta, Marcus Vinicius

    2006-01-01

    Orientadora: Rosana Herminia Scola Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Saúde, Programa de Pós-Graduação em Medicina Interna. Defesa: Curitiba, 2006 Inclui bibliografia e anexos

  10. O trabalho final de graduação em Arquitetura e Urbanismo : um estudo a partir das práticas docentes e discentes nos cursos de Arquitetura e Urbanismo das Universidades Federal e Tuiuti do Paraná /

    OpenAIRE

    Pinheiro Júnior, Clodualdo de Souza

    2006-01-01

    Orientador: Paulo Chiesa Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Educação, Programa de Pós-Graduação em Educação. Defesa: Curitiba, 2006 Inclui bibliografia e anexos Área de concentração: Educação, Cultura e Tecnologia

  11. Simulaçao de sistemas de aquecimento solar com materiais em mudança de fase (MMF) adaptados de resíduos pesados do refino do petróleo sob condiçoes transitórias de insolaçao e demanda

    OpenAIRE

    Lobo, Alexandre Ferreira

    2004-01-01

    Orientador: Marcelo Risso Errera Dissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduaçao em Engenharia - PIPE. Defesa: Curitiba, 2004 Inclui bibliografia e anexos Área de concentraçao: Engenharia de processos térmicos e químicos

  12. CLIMATOLOGIA E DESASTRES AMBIENTAIS: A DEMANDA DOS RECURSOS PÚBLICOS APÓS O ESPETÁCULO MIDIÁTICO

    Directory of Open Access Journals (Sweden)

    Edson Soares Fialho

    2013-08-01

    Full Text Available Os prejuízos econômicos e humanos desencadeados pelos eventos climáticos criou-se a entidade denominada Defesa Civil. Entretanto, frente às repercussões econômicas e sociais, a União criou estratégias para amparar os municípios afetados se restabelecerem. Neste sentido, este trabalho busca analisar o caminho dos recursos públicos após eventos climáticos extremos, destacando Minas Gerais. Para isto recorreu-se aos sítios da Secretaria Nacional de Defesa Civil, a CEDEC-MG e Transparência Pública. A partir da correlação dos dados, pode-se dizer que a defesa civil-MG presta apoio de aos municípios se prepararem para suportar os eventos climáticos, e mesmo se restabelecerem, mas para isto é importante à atuação da Defesa Civil ao nível Municipal. Deste modo, pode-se dizer que mesmo a CEDEC/MG amparando os municípios, ainda é notável o descaso do Poder Público Local que não observa os passos e prazos a serem seguidos para decretar a situação de emergência ou Estado de calamidade pública, que pelo menos garante a possibilidade de acesso aos recursos públicos estaduais e federais.

  13. Compreensőes de professores das séries iniciais sobre o ensino dos procedimentos matemáticos envolvidos nos algoritmos convencionais da adiçăo e da subtraçăo com reagrupamento /

    OpenAIRE

    Minotto, Rosana

    2006-01-01

    Orientadora: Ettične Guérios Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Educaçăo, Programa de Pós-Graduaçăo em Educaçăo. Defesa: Curitiba, 2006 Inclui bibliografia e anexos

  14. Detecção de Rickettsias do grupo febre maculosa em cães e equinos em São José dos Pinhais, PR /

    OpenAIRE

    Freitas, Marta Cristina Diniz de Oliveira

    2007-01-01

    Orientador: Prof. Marcelo Beltrão Molento Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Ciencias Veterinárias. Defesa: Curitiba, 2007 Inclui bibliografia

  15. Comparação de métodos cromatográficos por camada delgada e líquida com kits imunológicos para detecção de aflatoxinas em amendoim in natura e doce de amendoim /

    OpenAIRE

    Eizendeher, Leonir Bittencourt

    2005-01-01

    Orientador : Renato João Sossela de Freitas Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduaçao em Tecnologia de Alimentos. Defesa: Curitiba, 2005 Inclui bibliografia

  16. Papel da enzima óxido nítrico sintase induzível no desenvolvimento da hipertrofia e disfunção cardíaca /

    OpenAIRE

    Dias, Fernando Augusto Lavezzo

    2007-01-01

    Orientador : Rosalvo T.H. Fogaça Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Biologia Celular e Molecular. Defesa: Curitiba, 2007 Inclui bibliografia Área de concentração : Fisiologia

  17. Impacto do processo de inserçăo do aglomerado metropolitano de Curitiba nas redes globais sobre o mercado de trabalho local a partir dos anos 90 /

    OpenAIRE

    Croope, Silvana

    2005-01-01

    Orientador: Luis Lopes Diniz Filho Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias da Terra, Programa de Pós-Graduaçăo em Geografia. Defesa: Curitiba, 2005 Inclui bibliografia

  18. O controle litoestrutural na organizaçăo espacial da bacia do rio Tagaçaba (Paraná): uma análise morfométrica da rede de drenagem /

    OpenAIRE

    Garbossa, Renata Adriana

    2003-01-01

    Orientador: Naldy Emerson Canali Co-orientador: Alberto Pio Fiori Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias da Terra, Programa de Pós-Graduaçăo em Geologia. Defesa: Curitiba, 2003 Inclui bibliografia Área de concentraçăo: Geologia ambiental

  19. Graduaçăo em comunicaçăo social e tecnologia da informaçăo e comunicaçăo (TIC) : refletindo sobre o currículo /

    OpenAIRE

    Negri Filho, Paulo

    2008-01-01

    Orientadora: Gláucia da Silva Brito Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Educaçăo, Programa de Pós-Graduaçăo em Educaçăo. Defesa: Curitiba, 2008 Inclui bibliografia Área de concentraçăo: Cultura, escola e ensino

  20. Desenvolvimento de bioprocesso para produção de fitase por Aspergillus niger em fermentação no estado sólido utilizando subprodutos agrícolas para aplicação como aditivo na alimentação de aves e suínos /

    OpenAIRE

    Silva, Andrea Regina Zacarias

    2002-01-01

    Orientador : Prof. Dr. Carlos Roberto Soccol Co-orientadores : Prof. Dr. José A.R. Leon e Prof. Dr. Sandro Germano Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduaçao em Tecnologia de Alimentos. Defesa: Curitiba, 2002 Inclui bibliografia

  1. Physico-chemical characterization of human recombinant follicle-stimulating hormone (hFSH) and its subunits by reversed-phase high-performance liquid chromatography ( RP-HPLC): comparison with pituitary hFSH reference preparation from 'National Hormone and Pituitary Program' from USA; Caracterizacao fisico-quimica da foliculotropina humana(hFSH) recombinabte e de suas subunidades, por cromatografia liquida de alta eficiencia (HPLC) em fase reversa: comparacao com a preparacao de referencia de hFSH de origem hipofisaria do ''National Hormone and Pituitary Program'' dos EUA

    Energy Technology Data Exchange (ETDEWEB)

    Loureiro, Renan Fernandes

    2006-07-01

    A reversed-phase high-performance liquid chromatography (RP-HPLC) method for the qualitative and quantitative analysis of intact human folliclestimulating hormone (hFSH) was established and validated for accuracy, precision and sensitivity. Human FSH is a dimeric glycoprotein hormone widely used as a diagnostic analyte and as therapeutic product in reproductive medicine. The technique developed preserves the protein integrity, allowing the analysis of the intact heterodimeric form rather than just of its subunits, as it is the case for the majority of the conditions currently employed. This methodology has also been employed for comparing the relative hydrophobicity of pituitary, urinary and two Chinese hamster ovary (CHO)-derived hFSH preparations, as well as of two other related glycoprotein hormones of the anterior pituitary: human thyroid-stimulating hormone (hTSH) and human luteinizing hormone (hLH). The least hydrophobic of the three glycohormones analyzed was hFSH, followed by hTSH and hLH. A significant difference (p<0.005) was observed in t{sub R} between the pituitary and recombinant hFSH preparations, reflecting structural differences in their carbohydrate moieties. Two main isoforms were detected in urinary hFSH, including a form which was significantly different (p<0.005) for the pituitary and recombinant preparations. The linearity of the dose-response curve (r = 0.9965, n = 15) for this RP-HPLC methodology, as well as an inter-assay precision with relative standard deviation less than 4% for the quantification of different hFSH preparations and a sensitivity of the order of 40 ng, were demonstrated. The chromatographic behavior and relative hydrophobicity of the individual subunits of the pituitary and recombinant preparations were also analyzed. Furthermore, the accurate molecular mass of the individual hFSH subunits and of the heterodimer were simultaneously determined by matrix-assisted laser desorption ionization time-of-flight mass spectral analysis (MALDI-TOF-MS). The present methodology represents, in our opinion, an essential tool for characterization and quality control of this hormone that is not yet described in the main pharmacopoeias. (author)

  2. Obtention of agricultural gypsum traced on {sup 34} S (Ca{sup 34} SO{sub 4}.2H{sub 2}O), by chemical reaction between H{sub 2}{sup 34} SO{sub 4} and Ca(OH){sub 2}; Obtencao do gesso agricola marcado no {sup 34} S (Ca{sup 34} SO{sub 4}.2H{sub 2}O), por reacao quimica entre o H{sub 2}{sup 34} SO{sub 4} e Ca(OH){sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Rossete, Alessandra L.R.M.; Bendassolli, Jose A.; Ignoto, Raquel de Fatima; Batagello, Hugo Henrique [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil). Lab. de Isotopos Estaveis

    2002-07-01

    The gypsum (CaSO{sub 4}.2H{sub 2}O) has double function in the soil: as source of calcium and sulfur and reducing agent of aluminum saturation. The sulfur for the plants has acting in the vital functions and it is proven fact increase of the S deficiency in Brazilian soils. The isotope tracer {sup 34} S can elucidate important aspects in the sulfur cycle. The Ca{sup 34} SO{sub 4}.2H{sub 2}O was obtained by chemical reaction between Ca(OH){sub 2} and H{sub 2}{sup 34} SO{sub 4} solution. The acid was obtained by chromatography ionic change, using cationic resin Dowex 50WX8 and Na{sub 2}{sup 34} SO{sub 4} solution. The reaction was realized under slow agitation. After the reaction, the precipitate was separated and dried in ventilated stove at 60 deg C temperature. The Mass of the Ca{sup 34} SO{sub 4}.2H{sub 2}O produced was determined by method gravimetric. This way, a system contends resin 426 cm{sup 3}, considering volume of 2.2 liters can be obtained a solution contends 44.2 g of H{sub 2}{sup 34} SO{sub 4}, theoretically could be produced 78.0 g of Ca{sup 34} SO{sub 4}.2H{sub 2}O approximately. With results of the tests were verified that there was not total precipitation of the Ca{sup 34}SO{sub 4}.2H{sub 2}O. Were produced 73.7{+-} 0.6 g of Ca{sup 34} SO{sub 4}.2H{sub 2}O representing average income 94.6{+-}0.8 %. The purity of the produced CaSO{sub 4}.2H{sub 2}O was 98%. (author)

  3. Synthesis of Li{sub 1}+xM{sup I}II{sub x}Ti{sub 2}-x(PO{sub 4}){sub 3} with nasicon structure, using sol-gel methods. Study of the relationship microstructure electrical properties; Sintesis mediante quimica sol gel de compuestos Li{sub 1}+xM{sup I}II{sub x}Ti{sub 2}-x(PO{sub 4}){sub 3} con estructura tipo Nasicon. Estudio de la relacion microestructura-propiedades electricas

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Estebanez, M.; Rivera-Calzada, A.; Leon, C.; Santamaria, J.; Isasi-Marin, J.

    2010-07-01

    Compounds of formula Li{sub 1}+xM{sup I}II{sub x}Ti{sub 2}-x(PO{sub 4}){sub 3} with M{sup I}II = Cr, Fe and x = 0 and 0.05 have been prepared at soft temperatures using the Pechini synthesis method, based on sol-gel chemistry. The structural and microstructural characterization by X-ray diffraction and Scanning Electron Microscopy (SEM), shows that all of them crystallize in a NASICON-type structure with similar lattice parameters. Doping with Fe and Cr, causes an increase of the density of the samples after sinterization what clearly improves the ionic conductivity of the original material, LiTi{sub 2}(PO{sub 4}){sub 3} until values of 9x10{sup -}4 S cm{sup -}1 at room temperature in the chromium-doped material. (Author)

  4. Colaboración con el responsable de riesgos laborales del centro en la gestión del sistema de prevención de riesgos de la Fundación CARTIF

    OpenAIRE

    Vicente Iglesias, Patricia

    2012-01-01

    En el presente trabajo se desarrollan las memorias de las prácticas de empresa propuestas por el Máster de Gestión de Prevención de Riesgos Laborales, Calidad y Medio Ambiente, realizadas en Fundación Cartif, durante un periodo de 180 horas, basadas en el área de prevención de riesgos laborales, en sus tres especialidades: seguridad, higiene y ergonomía. Ingenería de Quimica y Tecnología del Medio Ambiente Máster en Gestión de la Prevención de Riesgos Laborales, Calidad y Medio...

  5. Determination of elements in the atmosphere of Valle de Toluca by Neutron Activation (July 1992 - April 1993)

    International Nuclear Information System (INIS)

    Garcia S, I.

    1994-01-01

    The purpose of this study is to continue with the environmental monitoring program of Valle de Toluca by means of the Neutron Activation Analysis and atomic absorption techniques. The analytical results corresponding to the period of July 1992 to April 1993, and the analyzed elements by Neutron Activation were Na, V, Br, Al and Mn, while Cr and Pb were analyzed by Atomic Absorption Spectroscopy. Since the study is a joint project with the Facultad de Quimica de la Universidad Autonoma del Estado de Mexico, the purpose is to continue with this type of chemical analysis. (Author)

  6. Electrochemical noise measurements techniques and the reversing dc potential drop method applied to stress corrosion essays

    International Nuclear Information System (INIS)

    Aly, Omar Fernandes; Andrade, Arnaldo Paes de; MattarNeto, Miguel; Aoki, Idalina Vieira

    2002-01-01

    This paper aims to collect information and to discuss the electrochemical noise measurements and the reversing dc potential drop method, applied to stress corrosion essays that can be used to evaluate the nucleation and the increase of stress corrosion cracking in Alloy 600 and/or Alloy 182 specimens from Angra I Nuclear Power Plant. Therefore we will pretend to establish a standard procedure to essays to be realized on the new autoclave equipment on the Laboratorio de Eletroquimica e Corrosao do Departamento de Engenharia Quimica da Escola Politecnica da Universidade de Sao Paulo - Electrochemical and Corrosion Laboratory of the Chemical Engineering Department of Polytechnical School of Sao Paulo University, Brazil. (author)

  7. Ellipsometry and electronic microscopy of ashes swept of the Popocatepetl volcano; Elipsometria y microscopia electronica de barrido de las cenizas del volcan Popocatepetl

    Energy Technology Data Exchange (ETDEWEB)

    Munoz, Aaron; Munoz, Rafel; Falcon, Nelson [Universidad de Carabobo, Valencia (Venezuela); Chavira, Enrique [Instituto Nacional de Astrofisica Optica y Electronica, Puebla (Mexico)

    2001-12-01

    The ellipsometry and the scanning electronic microscopy is applied to the study of the optic properties of Popocatepetl volcano ash in connection with the form, ruggedness and elemental chemical composition of the microparticles, also to argue about the relation with atmospheric conditions. [Spanish] Se aplica la eliposometria y la microscopia electronica de barrido al estudio de las propiedades opticas de las cenizas de volcan Popocatepetl en relacion con la forma, rugosidad y composicion quimica elemental de las microparticulas, destacandose su vinculacion con las condiciones de visibilidad.

  8. Networks 90: Polymer Networks Group Meeting (10th) and IUPAC international Symposium on Polymer Networks (10th) Held in Jerusalem on 20-25 May 1990. Programme and Abstracts

    Science.gov (United States)

    1990-05-25

    Ingenieria Quimica, 12 de octubre 1842, 8000 Bahia Blanca, Argentina. P-36 BRANCHING KINETICS OF EPOXY POLYMERIZATION OF 1,4-BUTANEDIOL DIGLYCIDYL ETHER...OF ENTANGLED POLYMERS IN MELTS L-6 J. des Cloizeaux (France) 14:45-15:05 THE CONCEPT OF INTRINSIC CHAIN STRESS IN L-7 POLYMER NETWORKS J.J. Weiner, J...RELATION TO DIFFUSIVE TRANSPORT A.M. Weiss, K. Adler, A.J. Grodzinsky, M.L. Yarmush (Israel, USA) 15:05-15:25 DIFFUSION BEHAVIOUR IN SOLUTIONS OF L-25

  9. Eliminación de contaminantes emergentes mediante adsorción empleando xerogeles de carbón

    OpenAIRE

    Álvarez, Silvia; Ribeiro, Rui; Gomes, Helder; Sotelo, José; Garcia, Juan

    2014-01-01

    En la actualidad el número de sustancias quimicas potencialmente peligrosas que pueden lIegar a alcanzar el medio ambiente es muy amplio, por lo que la atención en la investigación de la contaminación dei agua se ha extendido recientemente a lo que se denomina contaminación emergente; es decir, la contaminación causada por sustancias químicas de origen y propiedades muy diversas, en concentraciones muy bajas, y que persisten en las aguas residuales tras el tratamiento de éstas ...

  10. Sorción de hidrolizados proteicos en lana tratada con bisulfito sódico: influencia en las propiedades químicas y físico-mecánicas.

    OpenAIRE

    Gómez de Paula, Ma Nieves; Naik Kardile, Arun; Juliá Ferrés, Ma. Rosa; Erra Serrabasa, Pilar

    1997-01-01

    La sorción de hidrolizados proteicos en fibras queratinicas provoca una mejora en las propiedades físicas y quimicas de fibras dañadas. En este trabajo se presentan los resultados de las modificaciones de estas propiedades en lana tratada con bisulfito sódico e hidrolizado proteico bien de colágeno o de queratina o de sus respectivos derivados anfifílicos cuaternizados y se comparan con las obtenidas para lana tratada sólo con bisulfito sódico. The sorption of protein hydrolisates in kerat...

  11. DANAE: simulador de propiedades fisicoquímicas como una combinación entre la racionalización más pura y profunda y la medición experimental más tactual y empirica

    Directory of Open Access Journals (Sweden)

    Daniel Bogoya Maldonado

    1991-03-01

    Full Text Available Este articulo pretende ilustrar una combinación entre la razón y la experiencia para estimar propiedades fisicoquímicas, útiles para el cálculo de balances de materia y energia, de uso frecuente en ingenleria quimica. Igualmente, presenta el sistema DANAE, desarrollado para calcular interactivamente por microcomputador seis propiedades de compuestos puros y cinco de mezclas (hasta de quince componentes, basado en un banco de datos (de tamaño 250 KB Y dos programas principales (de tamaño 80 KB.

  12. Thermoregulation: Research and Clinical Applications

    Science.gov (United States)

    1989-08-01

    NEDERGAARD The Wenner-Gren Institute, Biologihus F3, University of Stockholm, S-106 91 Stockholm (Sweden) and *Cdtedra de Bioquimica , Facultad de Quimica...heart rate and a lack of arrhythmias. This was true as the temperature dropped and reached a low of 30-32°C, as well as in the actual recovery peri...like this to establish whether the response is linear with added amount, and the actual absorbance observed on each plate is not only a function of

  13. Análise da associação e do secretoma da interação entre Trichoderma spp. de solo do Cerrado com feijoeiro comum, Phaseolus vulgaris L.

    OpenAIRE

    Silva, Francilene Lopes da

    2014-01-01

    Algumas espécies de Trichoderma quando em íntima associação com plantas hospedeiras podem desencadear sua resposta de defesa e, desta forma, induzir resistência contra subsequentes infecções fúngicas. No presente trabalho foi analisado a expressão dos genes codificadores de proteínas de defesa (Glu, Chit 1, LOX, PER e PAL) em feijoeiro comum, Phaseolus vulgaris, em resposta à asssociação com os isolados das espécies T. asperellum (468/02) e T. harzianum (475/2 e 303/2), após 24, 48 e 72 horas...

  14. SUPERENDIVIDAMENTO: REFLEXÕES SOBRE APLICAÇÕES DO DIREITO DO CONSUMIDOR

    Directory of Open Access Journals (Sweden)

    Luciano Benetti Timm

    2016-11-01

    Full Text Available O presente artigo constata o problema do superendividamento do consumidor brasileiro e oferece meios legais e interpretativos de enfretamento jurídico do problema, por meio das normas aplicáveis do Código de Defesa do Consumidor. Fundamentalmente a solução passa pelo respeito ao dever de informação e esclarecimento do consumidor pelas instituições financeiras. Outrossim, os julgadores podem lançar mão dos mecanismos de manutenção econômico-financeira dos contratos e da proteção dos consumidores de crédito contra as cláusulas abusivas. Palavras-chave: Superendividamento; Consumidor de Crédito; Código de defesa do Consumidor.

  15. Aperfeiçoamento da política pública penal no Brasil: a inserção da audiência de custódia no processo penal

    OpenAIRE

    Bonatti, Daniel L.; Brunacci, Diogo Paiva; Silva, Leandro de Castro

    2014-01-01

    Neste exercício são discutidas formas de empreender mudanças em políticas públicas, focando especialmente no estudo da política prisional brasileira. O que é central no debate proposto é a viabilidade da inserção de audiência a ser realizada imediatamente após a prisão de um indivíduo, a audiência de custódia, que possibilitará o encontro entre a pessoa presa e o juiz. O ator promotor da mudança, o Instituto de Defesa do Direito de Defesa – IDDD apregoa como resultado mecanismos de prevenção ...

  16. Eosinofilia no sangue periférico de mulheres com candidiase vaginal recorrente

    OpenAIRE

    Queiroz Filho,José; Gonçalves,Ana Katherine; Cavalcante Júnior,Geraldo Barroso; Pessoa,Daliana Caldas; Eleutério Júnior,José; Giraldo,Paulo César; Sales,Valéria Soraya de Farias

    2013-01-01

    OBJETIVO: Quantificar o número de células de defesa e os níveis de imunoglobulina E (IgE) no sangue periférico em amostra de mulheres com candidíase vaginal recorrente. MÉTODOS: Estudo de corte transversal com 60 mulheres, 40 com candidíase vulvovaginal e 20 do grupo controle (sem doença). As células de defesa foram identificadas utilizando um sistema de impedância combinada com a citometria de fluxo, os níveis de IgE total e específica foram medidos por meio de técnicas de quimiluminescência...

  17. Alinhamento de recursos nas estratégias competitivas e colaborativas da Confepar

    OpenAIRE

    Santos, Joenice Leandro Diniz dos

    2009-01-01

    Orientador : Sergio Bulgacov Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Sociais Aplicadas, Programa de Pós-Graduação em Administração. Defesa: Curitiba, 27/03/2009 Inclui bibliografia e anexos Área de concentração: Estratégia e organizações

  18. Diabetes tipo 1: práticas educativas maternas e adesăo infantil ao tratamento /

    OpenAIRE

    Ribeiro, Patrícia Guillon

    2004-01-01

    Orientadora: Suzane Schmidlin Löhr Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Humanas, Letras e Artes, Programa de Pós-Graduaçăo em Psicologia. Defesa: Curitiba, 2004 Inclui bibliografia e anexos Área de concentraçăo: Psicologia da infância e adolescęncia

  19. FARC’s Influence in Brazil

    Science.gov (United States)

    2013-05-23

    Estratégia, Tecnologia Militar e Segurança,” Isto e Dinheiro. Forte.jor.br, http://www.forte.jor.br/2012/01/13/defesa-bilionaria/ (accessed 6 January 2013...pub_detail.asp (accessed 1 October 2012). Galante, Alexandre. “Estratégia, Tecnologia Militar e Segurança.” Isto é Dinheiro. Forte.jor.br. http

  20. Trust, Engagement, and Technology Transfer: Underpinnings for U.S.-Brazil Defense Cooperation (Strategic Forum, no. 279)

    Science.gov (United States)

    2012-08-01

    Political Sci- ence Review, no. 30 (2009), 122–124, 130. 7 Mauricio Pazini Brandão, “Ciência, Tecnologia , Inovação e a Defesa Nacional,” 3ª Conferência...Nacional de Ciência, Tecnologia e Inovação, October 2005, 798, available at <http://cncti3.cgee.org. br/Documentos/Seminariosartigos/Areasinternacional

  1. Brazil’s Security Strategy and Defense Doctrine

    Science.gov (United States)

    2011-01-01

    Empresa Brasileira de Aeronautica, S.A. (Embraer) has plans to begin production of the KC-390...in the military- controlled CINDACTA (Centro Integrado de Defesa Aérea e Controle de Tráfego Aéreo [Integrated Air Traffic Control and Air...with a collection of information if it does not display a currently valid OMB control number. 1. REPORT DATE 2011 2. REPORT TYPE 3. DATES

  2. Sistema da qualidade, inovação tecnológica e competitividade nas indústrias eletronicas e de software de Curitiba e região metropolitana

    OpenAIRE

    Camargo, Elizangela Gomes

    2008-01-01

    Orientador: João Carlos da Cunha Inclui apêndice Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciencias Sociais Aplicadas, Programa de Pós-Graduação em Administração. Defesa: Curitiba, 2008 Inclui bibliografia e anexos Área de concentração: Estratégia e organizações

  3. Germinação de sementes e desenvolvimento de brotos de Aechmea nudicaulis (L.) Griseb (Bromeliaceae) : subsídios à produção e extrativismo sustentável /

    OpenAIRE

    Anacleto, Adilson

    2005-01-01

    Orientadora: Raquel R. B. Negrelle Co-orientadora: Solange R. Zaniolo Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Agronomia - Produção Vegetal. Defesa: Curitiba, 2005 Inclui bibliografia e anexos Área de concentração: Produção vegetal

  4. Evoluçăo térmica de sills encaixados nas formaçőes Irati e Ponta Grossa (Bacia do Paraná) no Estado do Paraná: contribuiçăo para o entendimento da evoluçăo dos sistemas petrolíferos Irati - Rio Bonito/Pirambóia e Ponta Grossa - Itararé /

    OpenAIRE

    Petersohn, Eliane

    2006-01-01

    Orientadora: Eleonora Maria Vasconcellos Vanzela Co-orientadores: Paulo César Soares e Otávio Augusto Boni Licht Inclui apęndice Dissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias da Terra, Programa de Pós-Graduaçăo em Geologia. Defesa: Curitiba, 2006 Inclui bibliografia e anexos Área de concentraçăo: Geologia exploratória

  5. Trial-Based Thought Record (TBTR: preliminary data on a strategy to deal with core beliefs by combining sentence reversion and the use of analogy with a judicial process Registro de Pensamentos com Base no Processo (RPBP: dados preliminares de uma estratégia para lidar com crenças nucleares, combinando reversão de sentenças e analogia com o processo jurídico

    Directory of Open Access Journals (Sweden)

    Irismar Reis de Oliveira

    2008-03-01

    Full Text Available OBJECTIVE: To propose the Trial-Based Thought Record, a modified, 7-column thought record addressing core beliefs by sentence reversion and the analogy to a trial. METHOD: Clients (n = 30 participated in a simulation of a trial and exhibited shifts in their adherence to core beliefs and in the intensity of corresponding emotions after each step (investigation, prosecutor’ s plea, defense attorney’ s plea, prosecutor’ s second plea, defense attorney’ s second plea, and jury verdict during a session. RESULTS: Significant mean reductions existed between percent values after investigation (taken as baseline and defense attorney’ s plea (p OBJETIVO: Propor o Registro de Pensamentos com Base no Processo, versão modificada, com sete colunas, para lidar com as crenças nucleares por meio da combinação da reversão de sentenças e a analogia com um processo jurídico. MÉTODO: Os clientes (n = 30 participaram da simulação de um júri e exibiram mudanças na adesão às crenças nucleares e na intensidade das emoções correspondentes após cada passo durante uma sessão (investigação, alegação do promotor, alegação do advogado de defesa, réplica do promotor, tréplica do advogado de defesa e veredicto do júri. RESULTADOS: Reduções médias significantes foram observadas entre os valores percentuais após a investigação (tomada como valor basal, a alegação da defesa (p < 0,001 e o veredicto do júri, tanto das crenças (p < 0,001 quanto da intensidade das emoções (p < 0,001. Diferenças significantes foram também observadas entre as primeira e segunda alegações da defesa (p = 0,009 e entre a segunda alegação da defesa e o veredicto do júri no que diz respeito às crenças nucleares (p = 0,005 e às emoções (p = 0,02. CONCLUSÃO: O Registro de Pensamentos com Base no Processo pode, pelo menos temporariamente, ajudar os pacientes, de forma construtiva, a reduzirem a adesão às crenças nucleares negativas e emo

  6. Ácido salicílico inibe a formação de micorrizas arbusculares e modifica a expressão de quitinases e b-1,3-glucanases em raízes de feijoeiro

    Directory of Open Access Journals (Sweden)

    Costa Heron Salazar

    2000-01-01

    Full Text Available Os mecanismos que controlam o processo de colonização intrarradicular por fungos micorrízicos arbusculares ainda não são conhecidos, mas podem envolver o sistema de defesa vegetal. Normalmente, em condições favoráveis à formação de micorrizas arbusculares (MAs, e.g. baixo fosfato (P, ocorre supressão da expressão de genes de defesa, como quitinases e b-1,3-glucanases, em certos estágios do desenvolvimento das simbioses. Assim, a inibição do crescimento fúngico intrarradicular em condições de alto P pode ser decorrência da atenuação da supressão e/ou indução de genes de defesa específicos. Se o sistema de defesa está envolvido no controle do crescimento fúngico intrarradicular em condições de alto P, a aplicação às raízes de um indutor de respostas de defesa, como o ácido salicílico (AS, poderia simular o efeito inibitório do P. Este trabalho teve por objetivo avaliar o efeito do AS na colonização intrarradicular e nas atividades de quitinases e b-1,3-glucanases em raízes de feijoeiro (Phaseolus vulgaris L. var. Carioca 80-SH inoculadas com Glomus clarum ou Glomus intraradices, em condições de baixo e alto P. Em condições de baixo P, a aplicação de AS inibiu a colonização intrarradicular a níveis similares aos observados em condições de alto P. Em condições de alto P, a inibição da micorrização pelo AS foi ainda maior. Associado a essa inibição, incrementos de aproximadamente 10 vezes nas atividades específicas de quitinases e redução nas atividades de b-1,3-glucanases nas raízes das plantas que receberam AS foram observados. Em função dos padrões de atividades de quitinases e b-1,3-glucanases nas raízes não-inoculadas e inoculadas, não foi possível estabelecer uma relação entre as atividades dessas hidrolases e o crescimento fúngico intrarradicular.

  7. Análise do nível técnico dos goleiros da ASSAF - Associação Santa-cruzense de futsal no campeonato série ouro do estado do Rio Grande do Sul no ano de 2012

    Directory of Open Access Journals (Sweden)

    Edson Marcelo Neto da Silva

    2013-07-01

    Full Text Available Este estudo, de característica descritiva exploratória, tem como objetivo verificar quais são as principais intervenções técnicas e sua relação com o desempenho técnico ao longo das 23 partidas do campeonato série ouro do RS- 2012 dos goleiros da equipe ASSAF. Os sujeitos do presente estudo de caso, foram dois jogadores do sexo masculino com idade de 21 e 28 anos e os dados foram analisados no programa excel for windows 7. Observou-se que os goleiros tiveram um aproveitamento de 80% no seu desempenho técnico. As principais intervenções técnicas exigidas destes ao longo do campeonato foram: defesa saída de gol (DSG com 82 ações, lançamento com o pé correto (LPC foram registradas 81 ações, defesa baixa no lado esquerdo (DBE obteve 58 ações, defesa baixa no lado direito (DBD com 54 ações, defesa no meio do gol (DM tendo 54 ações, lançamento com a mão correto (LMC apresentando 44 ações e defesa alta no lado direito (DAD com 42 ações. Além de intervenções técnicas defensivas, observou-se uma participação técnico tática ofensiva relevante, com um alto índice de aproveitamento dos lançamentos executados tanto pelo pé (LPC como com a mão (LMC. Salienta-se a importância da execução do scout técnico para o correto desenvolvimento do treinamento dos goleiros de forma específica e embasada cientificamente. Sugere-se que esta análise dos dados seja executada em diferentes fases do campeonato, proporcionando um feedback contínuo ao trabalho, potencializando a efetividade das informações levantadas no scout.

  8. A simple model to evaluate the impact of the thermal power plants emissions; Un modelo simple para evaluar el impacto de las emisiones de centrales termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Rodas Grapain, Arturo; Salcido, Alejandro [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    2000-07-01

    Formulation and validation of a dispersion model for relative plumes are presented in this paper. This model (MOTTQUIP: Modelo de Transporte Turbulento y Quimico de Plumas) was developed to assess the environmental impact of power generation. The theoretical formulation if this model is based on the integral form of the mass balance equation. MOTTQUIP can simulate (in two dimensions) the turbulent dispersion and chemical transformation phenomena of a nitrogen oxides (Nox) non-buoyant plume in an ozone (O{sub 3}) atmosphere. The results produced by MOTTQUIP, however, can run in a personal computer consuming relatively short CPU times. [Spanish] En este trabajo se presentan la formulacion y la validacion de un modelo (MOTTQUIP: Modelo de Transporte Turbulento y Quimica de Plumas) para evaluar el impacto de las emisiones de contaminantes reactivos de centrales termoelectricas. Este modelo se formula a partir de la forma integral de la ecuacion de balance de masa, y no de su forma diferencial, como se procede generalmente. MOTTQUIP simula, en dos dimensiones, la dispersion turbulenta y transformacion quimica de una pluma no flotante de oxidos de nitrogeno (Nox), misma que se interna paulatinamente en un ambiente de ozono (O{sub 3}). Los resultados obtenidos son comparados con los de modelos alternos que simulan el mismo sistema reactivo, encontrandose una concordancia bastante aceptable. Una ventaja de MOTTQUIP, sin embargo, es que puede utilizarse en sistemas de computo pequenos, empleando tiempos de CPU relativamente cortos.

  9. Avaliação de risco e plasticidade comportamental limitada em girinos de Rhinella ornata (Anura, Bufonidae

    Directory of Open Access Journals (Sweden)

    Renan N. Costa

    2014-06-01

    Full Text Available Os girinos de anuros são elementos importantes das redes tróficas de ambientes aquáticos, sendo recurso alimentar de diversos tipos de predadores. Desta maneira, os girinos apresentam uma grande variedade de mecanismos de defesa que podem ser morfológicos, comportamentais e/ou fisiológicos. A impalatabilidade, produzida pelo acúmulo de substâncias tóxicas na pele, é um mecanismo comum em muitas linhagens de anfíbios. No entanto, alguns predadores não são afetados por estas substâncias tóxicas, o que pode favorecer o desenvolvimento de mecanismos alternativos de defesa contra predação. Neste contexto, nosso objetivo foi avaliar se girinos impalatáveis de Rhinella ornata (Spix, 1824, podem apresentar mecanismos comportamentais de defesa contra predação na presença de predadores que não são afetados pelas substâncias tóxicas em sua pele. Para testar nossa hipótese, utilizamos dois tipos de predadores aquáticos: um heteróptero aquático do gênero Belostoma e uma larva de libélula do gênero Aeshna. Os girinos foram colocados em aquários com pistas visuais e químicas dos predadores (experimento de risco direto, somente pistas químicas (experimento de risco indireto e ausência completa de sinais de predadores (controle. Em ambos os casos, o comportamento de natação foi observado durante 5 minutos. Durante os experimentos não houve alteração no comportamento de natação dos girinos.

  10. SISTEMA INTERAMERICANO, COOPERAÇÃO E A COMPETIÇÃO INTRAREGIONAL

    Directory of Open Access Journals (Sweden)

    Sabrina Evangelista Medeiros

    2014-12-01

    Full Text Available Este texto tem como propósito a análise do sistema inter-americano e da Organização dos Estados Americanos por meio de sua história e componentes relacionadas às tratativas e organicidade do sistema. Para isso, esta abordagem tem como base a sua evolução institucional, os diferentes usos conceituais e de propósito, as principais fases deste sistema e, em consequência, a reputação associada a ele em que pese os marcos regulatórios e compromissos assumidos no âmbito da OEA e fora dele. A hipótese é de que, a OEA teve constante evolução institucional por conta da transição de objetivos que sofreu entre o fim da Guerra Fria e o século XXI e que, nesta conjuntura e como forma de adaptar-se às outras frentes regionais potencialmente competitivas, volta-se para a questão da segurança individual e direitos humanos criando um guarda-chuva em que cabem, de maneira complementar, as demais iniciativas setorialmente organizadas, como as de finalidade energética, comercial ou de defesa. Por último, que a configuração do setor de defesa nestes mesmos marcos regulatórios criados ao longo destes anos apresenta-se pela fusão de fatores multidimensionais, que vão desde a segurança civil às fronteiras, com poucos aspectos tradicionais de defesa, realocando o seu papel na região

  11. Argentina, Brasil e Chile e o desafio da reconstrução das agencias nacionais civis de inteligencia no contexto no contexto de democratização

    OpenAIRE

    Priscila Carlos Brandão Antunes

    2005-01-01

    Resumo: Esta tese analisa as recentes reformas nos serviços de inteligência civil brasileiro, argentino e chileno, no contexto das relações civis militares. Três diferentes problemas analíticos estruturam a pesquisa: A) o desafio institucional da construção de sistemas que sejam eficientes, eficazes e consistentes com as demandas de segurança e defesa nestes países. Como os serviços de inteligência civis têm sido institucionalmente desenhados a partir dos processos de transição e consolidação...

  12. Investidores brasileiros no Paraguai : orçamento de capital nas decisões de investimento sob a perspectiva da teoria do investimento internacional

    OpenAIRE

    De La Cueva, Jazmin Figari

    2012-01-01

    Orientadora : Profª Drª Márcia Maria dos Santos Bortolocci Espejo Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Sociais Aplicadas, Programa de Pós-Graduação em Contabilidade. Defesa: Curitiba, 2012 Inclui referências : fls. 105-110 Área de concentração : Contabilidade e finanças Resumo: O presente estudo foi desenvolvido com a finalidade de identificar os fatores econômicos que foram considerados no uso do orçamento de capital para subsidiar as decisõe...

  13. Portinari e a arte social

    Directory of Open Access Journals (Sweden)

    Fabris, Annateresa

    2005-01-01

    Full Text Available O interesse pela pintura mural suscitou várias tomadas de posição no século XX, dentre elas, a defesa da difusão em ampla escala de imagens eivadas do compromisso do artista para com o próprio tempo e o próprio povo. No conjunto dos "ciclos econômicos", Portinari demonstra que é possível "narrar uma história" sem aderir à versão oficial, apresentando uma visão crítica da sociedade brasileira a partir do tema nuclear do trabalho

  14. Impacto de la maduración y de los puestos específicos en la condición física en jóvenes futbolistas

    OpenAIRE

    Massuça, Luis; Soarez, Helena; Fragoso, Isabel; Barrigas, Carlos

    2012-01-01

    Objetivo Describir las características condicionales de una población de deportistas jóvenes, tanto por nivel madurativo como por puestos específicos. Muestra Se han estudiado 95 jugadores de fútbol (13-16 años) pertenecientes a escuelas deportivas de futbol. Métodos Las variables utilizadas en este estudio han sido: edad, puesto específico (medio, defesa, delantero, portero), peso, altura, maduración, capacidad aeróbica, fuerza isométrica máxima del tren superior, ...

  15. Fatores que influenciam o sobrepeso de crianças menores de quatro anos usuárias do SUS e Centros de Ensino Infantil do Município de Curitiba

    OpenAIRE

    Baltazar, Daniele Ferreira Barbosa dos Santos

    2015-01-01

    Orientadora : Profª. Drª. Sandra M. W. Barreira Co-orientadora : Profª. Drª. Grace M. F. C. Wile Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas. Defesa: Curitiba, 27/03/2015 Inclui referências Área de concentração: Insumos, medicamentos e correlatos Resumo: A obesidade infantil se caracteriza como uma epidemia, sendo um dos principais desafios da saúde pública no momento. Seu combate pode ...

  16. Efeito do solo contaminado por óleo diesel na germinação de sementes e morfoanatomia de plântulas e tirodendros de Schinus terebinthifolius Raddi (Anacardiaceae)

    OpenAIRE

    Rezende, Igor Mendonça de

    2006-01-01

    Orientadora: Cleusa Bona Co-orientador: Luiz Antônio de Souza Dissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Botânica. Defesa: Curitiba, 17/02/2006 Inclui bibliografia e anexos Atualmente o petróleo e seus derivados são a forma de energia mais utilizada no mundo. Com isso, acidentes envolvendo derramamentos de óleo vêm ocorrendo freqüentemente nos últimos anos, causando grande impacto negativo no ambiente ...

  17. Estratégias analíticas baseadas no emprego da extração em fase sólida para a determinação cromatográfica de contaminantes emergentes em águas naturais

    OpenAIRE

    Castro, Franciane Silva Beltramin de

    2016-01-01

    Orientador : Prof. Dr. Marco Tadeu Grassi Coorientador : Prof. Dr. Bruno J. Gonçalves da Silva Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Química. Defesa: Curitiba, 30/06/2016 Inclui referências : f. 82-89 Resumo: A quantidade de contaminantes em águas superficiais e subterrâneas têm aumentado muito nas últimas décadas. Dentre os contaminantes que podem estar presentes na água estão os contaminantes emergentes, q...

  18. Comunidade quilombola Manoel Ciriaco dos Santos : identidade e famílias negras em movimento

    OpenAIRE

    Ribeiro, Dandara dos Santos Damas

    2015-01-01

    Orientadora: Profª. Drª. Liliana de Mendonça Porto Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Humanas, Programa de Pós-Graduação em Antropologia Social. Defesa: Curitiba, 23/11/2015 Inclui referências : f. 229-238 Resumo: Esta dissertação, baseada na etnografia realizada junto à "Comunidade Quilombola Manoel Ciriaco dos Santos", localizada em Guaíra/PR, problematiza a vinculação direta entre a legitimidade da reivindicação territorial das comunidades q...

  19. Dosagem de concreto ecológico com base em estudo de empacotamento de partículas

    OpenAIRE

    Londero, Carolina

    2016-01-01

    Orientador : Profª. Drª. Nayara Soares Klein Co-orientador : Prof. Dr. Wellington Mazer Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Construção Civil. Defesa: Curitiba, 29/04/2016 Inclui referências : f. 119-126 Area de concentração : Materiais e estruturas Resumo: As questões ambientais que envolvem a produção de concreto vêm sendo muito estudadas, uma vez que o consumo elevado de cimento Portland causa impactos amb...

  20. O efeito da adição de lodo de lavanderia industrial em material cerâmico

    OpenAIRE

    Santos, Camila Fukuda Gomes

    2013-01-01

    Orientador: Dr. Sc. Vsévolod Mymrine Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE. Defesa: Curitiba, 28/08/2013 Inclui referências Área de concentração: Engenharia e ciência de materiais Resumo: O trabalho é dedicado ao desenvolvimento de um novo método de utilização de lodo de lavanderias industriais na mistura com argila caulinítica. As composições destes materiais foram queim...

  1. Alterações neuroquímicas e morfológicas induzidas pelo hipertireoidismo no hipocampo de ratos imaturos

    OpenAIRE

    Andrade, Camila Mariana

    2014-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Bioquímica, Florianópolis, 2014. O hipertireoidismo está relacionado a diversas manifestações neurológicas. Todavia, os mecanismos precisos pelos quais os HT induzem seus efeitos no cérebro durante o desenvolvimento ainda são controversos. Os objetivos deste trabalho foram analisar o efeito desta patologia sobre a indução de estresse oxidativo, bem como as defesas an...

  2. A realidade do mundo da ciência: um desafio para a história, a filosofia e a educação científica

    Directory of Open Access Journals (Sweden)

    Eduardo Salles O. Barra

    1998-01-01

    Full Text Available O esclarecimento e a justificação dos modos pelos quais as teorias científicas apreendem e não apreendem o mundo real são tratados como problemas pertinentes à história e filosofia da ciência. Pretende-se que estes sejam também desafios próprios da educação científica. A defesa de uma concepção realista das teorias científicas é mostrada como uma maneira adequada e consistente de enfrentar esse desafio.

  3. Obtenção de vanilina por via microbiana

    OpenAIRE

    Vasconcelos, Marcio dos Santos

    2014-01-01

    Orientadora : Profa. Dra. Adriane B. P. Medeiros Tese (doutorado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia de Bioprocessos e Biotecnologia. Defesa: Curitiba,14/11/2014 Bibliografia: fls. 102-105 Resumo: Este trabalho teve como objetivo a determinação das melhores condições para o desenvolvimento de um processo viável de produção biotecnológica de vanilina a partir de fermentação por microrganismos. Foram testados protocolos para ...

  4. Tipo de perda e qualidade da recuperação em transgressões no relacionamento B2C

    OpenAIRE

    Schwarzbach, Loise Cristina

    2015-01-01

    Orientadora : Profª. Drª. Danielle Mantovani Lucena da Silva Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Sociais Aplicadas, Programa de Pós-Graduação em Administração. Defesa: Curitiba, 30/03/2015 Inclui referências : fls. 116-124 Resumo: O objetivo desta pesquisa foi verificar a influência do tipo de perda (tangível vs psicológica) e do desempenho da recuperação (alta vs media vs baixa) de transgressões no relacionamento B2C - Business to Consumer sobr...

  5. As categorias processuais na justiça constitucional limitada

    OpenAIRE

    Magano, José Paulo Camargo

    2012-01-01

    O presente trabalho visa ao estabelecimento de lindes da tutela constitucional nas categorias processuais a fim de conferir àquela certificação de processo justo, discorrendo para tanto, sobre a morfologia da justiça constitucional, na qual são tratados os institutos fundamentais do processo civil, jurisdição, ação, defesa e processo, sob influência do devido processo legal, e sobre a própria morfologia processual da justiça constitucional, em que são apontados os d...

  6. A diversidade de lagartos na Caatinga é mediada pelos térmitas?

    OpenAIRE

    Souza, Heitor Bruno de Araujo

    2012-01-01

    Ao tentar explicar a extraordinária taxa de coexistência de lagartos em desertos Australianos, Morton & James (1988) formularam uma hipótese em que a diversidade de térmitas promoveria uma diversificação dos lagartos. O presente estudo visa verificar se essa hipótese é válida para as taxocenoses de lagartos da Caatinga. Objetiva-se também verificar se os mecanismos de defesa dos térmitas influenciam a taxa com que esses são consumidos pelos lagartos e se esse padrão difere entre diferentes li...

  7. Dieta com ácidos graxos poli-insaturados ômega-3 em modelo de Parkinsonismo em ratos expostos à endotoxina bacteriana pré e pós-natal : avaliação comportamental e neuroquímica

    OpenAIRE

    Delattre, Ana Marcia

    2014-01-01

    Orientadora : Profª. Drª. Anete Curte Ferraz Co-orientador : Prof. Dr. Marcelo de M. S. Lima Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Biologia Celular e Molecular. Defesa: Curitiba, 28/08/2014 Inclui referências Área de concentração : Fisiologia Resumo: A doenca de Parkinson (DP) e uma patologia neurodegenerativa complexa que inclui sintomas cognitivos, motores e nao-motores, com fatores etiologicos ainda estu...

  8. A dinâmica atual do conflito entre uso e conservação de recursos pesqueiros na estação ecológica de Guaraqueçaba, Paraná

    OpenAIRE

    Arantes, Ana Carolina Vitorio

    2016-01-01

    Orientador : Profª. Drª. Juliana Lima Spínola Coorientador : Profª. Drª. Cristina Frutuoso Teixeira Dissertação (mestrado) - Universidade Federal do Paraná, Programa de Pós-Graduação em Meio Ambiente e Desenvolvimento. Defesa: Curitiba, 29/04/2016 Inclui referências : f. 160-176 Resumo: O desenvolvimento, quando entendido unicamente por crescimento econômico, desconsiderando aspectos sociais, ecológicos, culturais, é responsável por causar degradação em todos esses aspectos. A deg...

  9. Ecologia e evolução da paisagem do Parque Estadual do Cerrado (Jaguariaíva - PR) e de sua zona de amortecimento

    OpenAIRE

    Goulart, Adriano Ávila

    2014-01-01

    Orientador : Prof. Dr. Everton Passos Co-orientador : Prof. Dr. João Carlos Nucci Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Terra, Programa de Pós-Graduação em Geografia. Defesa: Curitiba, 15/05/2014 Inclui referências Resumo: O Cerrado, formação vegetal que já ocupou cerca de 24% de todo o território brasileiro, atualmente se encontra em um quadro de grande fragmentação. Este contexto deve-se a expansão, incentivada pelo governo federal após 19...

  10. Seabather’s eruption: report of the six cases in southern Brazil

    OpenAIRE

    Rossetto, André Luiz; Mora, Jamesson de Macedo; Correa, Patrícia Rossetto; Resgalla Junior, Charrid; Proença, Luís Antônio de Oliveira; Silveira, Fábio Lang da; Haddad Junior, Vidal

    2007-01-01

    O prurido do traje de banho ou seabather’s eruption é uma dermatite intensamente pruriginosa que ocorre pelo contato com larvas plânulas do cnidário cifozoário Linuche unguiculata, especialmente sob os trajes de banhistas. As larvas disparam seus nematocistos a partir de cnidócitos ou células urticantes de defesa na pele da vítima, causando uma típica erupção pápulo-eritemato-pruriginosa. Os primeiros cinco casos descritos no Brasil foram publicados em 2001, no litoral Sudeste (Ubatuba, SP), ...

  11. Prurido do traje de banho: relato de seis casos no Sul do Brasil

    OpenAIRE

    Rossetto,André Luiz; Mora,Jamesson de Macedo; Correa,Patrícia Rossetto; Resgalla Junior,Charrid; Proença,Luís Antônio de Oliveira; Silveira,Fábio Lang da; Haddad Junior,Vidal

    2007-01-01

    O prurido do traje de banho ou seabather’s eruption é uma dermatite intensamente pruriginosa que ocorre pelo contato com larvas plânulas do cnidário cifozoário Linuche unguiculata, especialmente sob os trajes de banhistas. As larvas disparam seus nematocistos a partir de cnidócitos ou células urticantes de defesa na pele da vítima, causando uma típica erupção pápulo-eritemato-pruriginosa. Os primeiros cinco casos descritos no Brasil foram publicados em 2001, no litoral Sudeste (Ubatuba, SP), ...

  12. DIREITOS HUMANOS, DESENVOLVIMENTO SUSTENTÁVEL E SUSTENTABILIDADE

    OpenAIRE

    Carvalho, Sonia Aparecida de; Silva, Denival Francisco da; Adolfo, Luiz Gonzaga Silva

    2015-01-01

    Este artigo trata da relação intrínseca entre os direitos humanos, o desenvolvimento sustentável e a sustentabilidade. Seu objetivo geral consiste em analisar o modelo de desenvolvimento implementado e a necessária proteção e preservação do meio ambiente ligado à defesa dos direitos humanos. Os objetivos específicos pretendem investigar a distinção dos termos sustentabilidade e desenvolvimento sustentável, como a concretização do direito à sustentabilidade, os critérios e as dimensões da sust...

  13. A PROTEÇÃO JURÍDICA DO MEIO AMBIENTE NA SOCIEDADE MULTICULTURAL: O MOTE DA SUSTENTABILIDADE

    OpenAIRE

    Damo Cervi, Taciana Marconatto

    2009-01-01

    O desenvolvimento econômico e social influenciou sensivelmente os mecanismos da natureza, culminando em uma crise ambiental de repercussões sérias no tocante à qualidade de vida e do próprio meio ambiente. Os anseios da sociedade pela tutela jurídica do meio ambiente foram incorporados pela Constituição Federal de 1988 que reconheceu o direito ao meio ambiente ecologicamente equilibrado. A pesquisa busca identificar os instrumentos jurídicos de defesa ambiental e as diferentes esferas de resp...

  14. Caracterização do mecanismo de ação antiinflamatória do flavonóide BAS1 isolado da planta Brosimum acutifolium

    OpenAIRE

    MORAES, Waldiney Pires

    2011-01-01

    Inflamação é a resposta do organismo a injúria e perigo. Apesar de a inflamação ser um mecanismo de defesa do organismo, a intensidade e/ou a persistência desta resposta pode ser maléfica para o indivíduo. Neste contexto, os produtos naturais, são importantes fontes de moléculas biologicamente ativas, e é considerado, um recurso promissor para a descoberta de novos fármacos. Baseado em estudos etnofarmacológicos, foi isolado da planta Brosimum acutifolium, popularmente conhecida como “Mururé ...

  15. Respostas fisiológicas, perceptuais e afetivas de seis protocolos de treinamento intervalado de alta intensidade em universitários

    OpenAIRE

    Follador, Lucio

    2016-01-01

    Orientador : Prof. Dr. Sergio Gregorio da Silva Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Educação Física. Defesa: Curitiba, 26/02/2016 Inclui referências : f. 50-59 Área de concentração: Exercício e esporte Resumo: Objetivo: comparar as respostas fisiológicas, perceptuais e afetivas de seis protocolos de treinamento intervalado de alta intensidade (HIIT, do inglês High Intensity Interval Training) em univer...

  16. Transcritoma e proteoma do fungo Paracoccidioides em condições de privação de glicose ou hipóxia

    OpenAIRE

    Lima, Patrícia de Sousa

    2014-01-01

    Paracoccidioides spp. causa a paracoccidioidomicose, uma das micoses mais frequentes na América Latina. O fungo cresce como micélio no meio ambiente, e como levedura, no hospedeiro. A fim de sobreviver no corpo humano, patógenos devem se adaptar nos microambientes os quais são frequentemente caracterizados por baixas disponibilidades de nutrientes e oxigênio. Uma das primeiras linhas de defesa deste fungo durante invasão no hospedeiro são os macrófagos residentes nos pulmões, considerados pob...

  17. Efeito da seca e chuva sobre a comunidade microbiana da rizosfera de leguminosas da Caatinga

    OpenAIRE

    Milena Duarte Lançoni

    2014-01-01

    Propriedades que constituem um clima árido são encontradas distribuídas por todo o globo terrestre. A Caatinga, bioma semi-árido brasileiro, se estende por 11% do território nacional e tem particularidades tanto em relação ao clima, volume de chuvas e temperatura, quanto à sua composição flora e faunística. Micro-organismos associados a plantas provêm defesas e resistência a diferentes estresses abióticos ou bióticos. Este trabalho teve por objetivo avaliar a comunidade rizosférica microbiana...

  18. Desenvolvimento de formulações de argamassas autonivelantes para pisos e avaliação da retração por secagem

    OpenAIRE

    Silva, Sarah Honorato Lopes da

    2016-01-01

    Orientador : Profª. Drª. Marienne do Rocio de Mello Maron da Costa Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Construção Civil. Defesa: Curitiba, 15/04/2016 Inclui referências : f. 100-108 Resumo: Uma argamassa autonivelante deve apresentar como principais propriedades a alta fluidez e elevada resistência à segregação. Isto se torna possível devido ao equilíbrio entre a alta fluidez, viscosidade moderada e a coesão entre...

  19. Mananase : produção por via convencional e recombinante e obtenção de produto formulado líquido

    OpenAIRE

    Montibeller, Valesca Weingartner

    2015-01-01

    Orientador : Profª. Drª. Luciana Porto Souza Vandenberghe Coorientadores : Prof. Dr. Carlos Ricardo Soccol e Profª. Drª.Vanete Thomaz Soccol Tese (doutorado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia de Bioprocessos e Biotecnologia. Defesa: Curitiba, 15/06/2015 Inclui referências : f. 145-166 Área de concentração: Agroindústria e biocombustíveis Resumo:As mananases são enzimas aplicadas nos mais diversos segmentos industriais...

  20. Estratégias de inovação para micro e pequenas empresas e seus impactos no desenvolvimento econômico : comparativo com as economias de industrialização recente

    OpenAIRE

    Souza, Viviane Gariba de

    2015-01-01

    Orientador : Prof. Dr. Armando João Dalla Costa Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciencias Sociais Aplicadas, Programa de Pós-Graduação em Desenvolvimento Ecônomico. Defesa : Curitiba, 2015 Inclui referências : f. 127-133 Resumo: Não é de agora que as discussões em torno do porte da empresa, como influenciador do processo produtivo, permeiam no meio teórico, gerando grandes controvérsias, assim como não são recentes os estudos que assumem a inovação e...