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Sample records for natural sinergia na

  1. PROMINP (Program of Mobilization of the National Industry of Oil and Natural Gas): synergy in the national industry; PROMINP (Programa de Mobilizacao da Industria Nacional de Petroleo e Gas Natural): sinergia na industria nacional

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Jose Renato Ferreira de; Campos, Michel Fabianski; Lopesm Ronaldo Rangel; Lisboa, Vitor Manuel dos Santos [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The Federal Government identified, from the forecast of massive investments in the sector of oil and natural gas in the next years, that it was establishing a favorable environment to foment the participation of the national industry of goods and services, in competitive and sustainable bases, in the implantation of projects of oil and gas in Brazil. Thus, in 2003, it was born the Program of Mobilization of the National Industry of Oil and Natural Gas - PROMINP. From an ample diagnosis of the necessary critical resources, throughout the time, for the implementation of the planned projects, the PROMINP identifies the gaps related to the professional qualification, industrial infrastructure and supply of materials and equipment, and, to surpass these challenges, it has lead, in these five years of existence, an expressive set of action for each one of the cited sources, of form to assure the competitiveness of the Industry of Supply of Goods and services and the support of this process. Such actions are elaborated and developed of joint form it enters all the participants of the chain. Since the creation of the PROMINP, the participation of the national industry (Local Content) in the investments of the sector increased of 57% in 2003 for 75% in 2007, what it means a US$ addition 8,3 billion orders of goods and services in the national market and generated more than 390 thousand new jobs. (author)

  2. Formação e trabalho coletivo na saúde mental: Intersetoriadade e sinergia

    Directory of Open Access Journals (Sweden)

    Edna Maria Goulart Joazeiro

    2018-04-01

    Full Text Available O artigo apoia-se em bibliografia sobre o tema, na experiência docente no Ensino Superior e na produção discente de Trabalhos de Conclusão de Curso de Serviço Social da UFPI sobre o campo da Saúde Mental nos anos 1991-2016. O estudo analisa a questão da formação nesse campo de saber e de intervenção, considerando os aspectos inerentes ao trabalho na Saúde Mental, o arcabouço legal do Sistema Único de Saúde (SUS relativo à produção do cuidado à pessoa com transtorno mental, as interfaces com as diversas políticas sociais indispensáveis à defesa da vida num espaço de trabalho, necessariamente coletivo, que precisa ser sinérgico. A experiência de vida dessa população tende a ser profundamente marcada pela desigualdade no acesso aos bens materiais, culturais e ao cuidado com a vida. A discussão é apresentada em três partes, no primeiro momento, discutimos os marcos conceituais e legais presentes na história recente desta Política no Brasil e em Teresina. Em seguida, confrontam-se as análises da produção dos formandos sobre esse campo de saber. Por último, destacam-se as narrativas na sua relação com os dispositivos de cuidado e as políticas sociais existentes no decorrer do tempo, visando discutir como o processo de compreensão do território, das políticas sociais e dos horizontes do cuidado destes dispositivos comunitários substitutivos ao hospital psiquiátrico, pode impactar e retroalimentar o processo de formação, abrindo espaço para uma compreensão ampliada do valor do trabalho coletivo em consonância com as necessidades de saúde e com as necessidades sociais desta população.

  3. Sinergia cognitiva y pobreza

    Directory of Open Access Journals (Sweden)

    William Orlando Prieto Bustos

    2010-07-01

    Full Text Available El capital social es un factor de crecimiento económico y desarrollo enla medida en que las regulaciones formales e informales implícitas en la interacción social disminuyen los costos de transacción económicos asociados a la información imperfecta, la selección adversa y el riesgo moral. El presente documento realiza una aproximación empírica a la categoría conceptual de “sinergia cognitiva” o “capital sinergético” propuesta por Boisier utilizando un diseño metodológico que contrasta una población de beneficiarios de programas sociales en un territorio insular y un territorio continental de la República de Colombia. Una vez se controlan los factores demográficos, tecnológicos e institucionales formales se indaga por los efectos de la formación de “sinergia cognitiva” a partir de la formación de capital social informal o cultural. Los resultados indican una mayor relevancia del capital social en la reducción de la pobreza vía mejoras en la habitabilidad de las viviendas que en relación con las posibilidades de generación de ingresos. Sin embargo, a niveles reducidos de ingresos la formación de capital social está asociada a incrementos en ingresos y a menores niveles de pobreza.

  4. Aspectos sociotécnicos das TI & Relacionamento Humano & Sinergia

    Directory of Open Access Journals (Sweden)

    Sergio Vieira Holtz Filho

    2008-06-01

    Full Text Available As Tecnologias de Informação (TI estão entre os principais agentes de mudança sociais. Para gerir tais mudanças, uma miríade de áreas do conhecimento humano têm muito a contribuir para a abordagem dos aspectos sociotécnicos das TI e promover sinergia. Como uma organização empresarial atua no sentido de provocar mudanças no comportamento das pessoas, visando a melhoria contínua, esse processo de mudança provocada chama-se aprendizagem. Isto posto, neste artigo apresentaremos resultados observados em empresas em processo de reengenharia e submetidas a utilização de metodologias integradas (PDCA, Método Paulo Freire e Roteiro Integração de Equipes, abordando os aspectos sociotécnicos das TI & relacionamentos humanos pela praxe da pedagogia como elemento de sinergia.

  5. Ruptura de tejidos relacionales: huella de una sinergia corporativa

    OpenAIRE

    Luz María Rivas Montoya

    2012-01-01

    Los procesos de implementación de estrategias sinérgicas tienen, inevitablemente, efectos no previstos en los actores sociales de la organización. En este artículo, se presenta la ruptura de tejidos relacionales como un claro ejemplo de estos efectos o huellas*, que emergieron al narrar la experiencia individual que los actores sociales tuvieron con la sinergia corporativa en un grupo económico líder del sector de servicios en Colombia. Desde un método cualitativo, una aproximación etnográfic...

  6. SINERGIA laparoscopic virtual reality simulator: didactic design and technical development.

    Science.gov (United States)

    Lamata, Pablo; Gómez, Enrique J; Sánchez-Margallo, Francisco M; López, Oscar; Monserrat, Carlos; García, Verónica; Alberola, Carlos; Florido, Miguel Angel Rodríguez; Ruiz, Juan; Usón, Jesús

    2007-03-01

    VR laparoscopic simulators have demonstrated its validity in recent studies, and research should be directed towards a high training effectiveness and efficacy. In this direction, an insight into simulators' didactic design and technical development is provided, by describing the methodology followed in the building of the SINERGIA simulator. It departs from a clear analysis of training needs driven by a surgical training curriculum. Existing solutions and validation studies are an important reference for the definition of specifications, which are described with a suitable use of simulation technologies. Five new didactic exercises are proposed to train some of the basic laparoscopic skills. Simulator construction has required existing algorithms and the development of a particle-based biomechanical model, called PARSYS, and a collision handling solution based in a multi-point strategy. The resulting VR laparoscopic simulator includes new exercises and enhanced simulation technologies, and is finding a very good acceptance among surgeons.

  7. Ruptura de tejidos relacionales: huella de una sinergia corporativa

    Directory of Open Access Journals (Sweden)

    Luz María Rivas Montoya

    2012-06-01

    Full Text Available Los procesos de implementación de estrategias sinérgicas tienen, inevitablemente, efectos no previstos en los actores sociales de la organización. En este artículo, se presenta la ruptura de tejidos relacionales como un claro ejemplo de estos efectos o huellas*, que emergieron al narrar la experiencia individual que los actores sociales tuvieron con la sinergia corporativa en un grupo económico líder del sector de servicios en Colombia. Desde un método cualitativo, una aproximación etnográfica y un enfoque hermenéutico, se exploraron las experiencias y percepciones de diversos actores sociales. La ruptura de tejidos relacionales fue una de las categorías que emergió como huella relevante; esta ruptura se caracteriza por cambios en las relaciones laborales, tensión autonomía/heteronomía y conflictos de poder, situaciones que expresan las consecuencias no previstas de la implementación de la integración de servicios compartidos o sinergia corporativa. Es conveniente advertir que la principal limitación de este estudio exploratorio es que no permite la proposición de modelos ni la construcción de un caso de estudio metodológicamente riguroso. El pensamiento complejo desde la perspectiva de Edgar Morin iluminó el camino de reflexión acerca de la ruptura de tejidos relacionales en cuanto a huella. Estos tejidos son esenciales en cualquier tipo de organización, pero lo son aún más en grupos económicos donde la diversidad de los negocios y culturas exige redes para hacer más productiva y amable la rutina organizacional.

  8. Revisión del tema de sinergias corporativas: origen, resultados y beneficiarios

    Directory of Open Access Journals (Sweden)

    Luz Maria Rivas

    2017-04-01

    Full Text Available La materialización de sinergias es un reto para la administración de empresas multinegocios. En este texto se presenta el estado del conocimiento sobre las sinergias en el subcampo de la estrategia corporativa. Para ello se estudian artículos publicados entre 2003 y 2015 en revistas académicas, reconocidas por el Institute for Scientific Information-ISI Web of Science y por Scimago. Esta revisión de tema diferencia las investigaciones que abordan las sinergias como resultado en la etapa de adquisición y se centra en la de integración, donde la práctica administrativa toma mayor relevancia. Por lo tanto, se propone estudiar las sinergias a partir de criterios de clasificación identificados en la literatura: origen, resultados y beneficiarios. De esta forma, reconocer la diversidad de sinergias abre un camino para enfrentar el reto de la administración multinegocios.

  9. Learning curves of basic laparoscopic psychomotor skills in SINERGIA VR simulator.

    Science.gov (United States)

    Sánchez-Peralta, L F; Sánchez-Margallo, F M; Moyano-Cuevas, J L; Pagador, J B; Enciso, S; Gómez-Aguilera, E J; Usón-Gargallo, J

    2012-11-01

    Surgical simulators are currently essential within any laparoscopic training program because they provide a low-stakes, reproducible and reliable environment to acquire basic skills. The purpose of this study is to determine the training learning curve based on different metrics corresponding to five tasks included in SINERGIA laparoscopic virtual reality simulator. Thirty medical students without surgical experience participated in the study. Five tasks of SINERGIA were included: Coordination, Navigation, Navigation and touch, Accurate grasping and Coordinated pulling. Each participant was trained in SINERGIA. This training consisted of eight sessions (R1-R8) of the five mentioned tasks and was carried out in two consecutive days with four sessions per day. A statistical analysis was made, and the results of R1, R4 and R8 were pair-wise compared with Wilcoxon signed-rank test. Significance is considered at P value psychomotor skills that can be trained in SINERGIA. Therefore, and based on these results together with previous works, SINERGIA could be used as training tool with a properly designed training program.

  10. SINERGIAS ENTRE GESTÃO DO CONHECIMENTO E PLANEJAMENTO TECNOLÓGICO: UM ESTUDO DE CASO

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    Hércules Antonio do Prado

    2013-08-01

    Full Text Available No âmbito das empresas da área de Tecnologia da Informação, o planejamento tecnológico é um importante instrumento de Gestão do Conhecimento que leva em conta tanto as necessidades de mercado quanto a proposição de novas soluções tecnológicas a partir do acervo tecnológico disponível ou de novos desenvolvimentos. Apesar de o planejamento tecnológico ser uma atividade intensiva no uso e na geração de conhecimento, não há reportado na literatura um pro-cesso sistemático de gestão deste conhecimento. Assim, esta pesquisa teve como objetivo escla-recer as relações entre Gestão do Conhecimento e Planejamento Tecnológico para a melhoria de processos e o aproveitamento do conhecimento gerado para a solução de problemas futuros. Co-mo instrumento de planejamento tecnológico, utilizou-se o Technology Roadmapping, técnica orientada às necessidades do negócio que auxilia na identificação, seleção e desenvolvimento das alternativas tecnológicas. Uma pesquisa quali-quantitativa foi realizada em uma organização da área de Tecnologia da Informação do Distrito Federal, em duas etapas. A primeira etapa foi uma pesquisa-ação voltada à elaboração de um Planejamento Tecnológico para subsidiar a segunda etapa, que consistiu de um levantamento de campo visando a levantar sinergias entre Gestão do Conhecimento e Planejamento Tecnológico. Os resultados encontrados desnudam pontos em que o planejamento tecnológico, por meio de um Technology Roadmapping, enriquecem o modelo de gestão do conhecimento em uma organização. Assim, novas oportunidades de negócio, funciona-lidades e produtos foram identificados a partir do compartilhamento do conhecimento utilizado na elaboração do roadmap. Ao mesmo tempo, os insumos requeridos na construção de um road-map - como pessoas com conhecimento e ambiente para realização de atividades como discussões e documentos - permitiram levantar novas demandas a serem atendidas pela

  11. NA48 unravels one of nature's most subtle secrets

    CERN Multimedia

    2001-01-01

    NA48 has just announced its final results confirming direct CP-violation with great precision. This phenomenon helps us to understand the imbalance between matter and antimatter in the Universe. At a seminar at CERN on 10 May Guillaume Unal of the Laboratory's NA48 collaboration announced NA48's final result on one of nature's best-kept secrets. Direct CP-violation, as it is called, is a subtle effect that betrays nature's preference for matter over antimatter, the reason why we are here. In 1993, an earlier CERN experiment, NA31, and the E731 experiment at Fermi National Accelerator Laboratory (Fermilab) in the USA published the first precise results on direct CP-violation. The CERN result suggested that direct CP-violation was a real effect. The Fermilab result, while not excluding the effect, was also compatible with no direct CP-violation. More precise measurements were clearly needed, and ambitious new experiments at the two laboratories - NA48 and KTeV - soon rose to the challenge. Both have now measure...

  12. Cultura organizacional: sinergias e alergias entre Hofstede e Trompenaars

    Directory of Open Access Journals (Sweden)

    Daniel Pacheco Lacerda

    2011-10-01

    Full Text Available Entre os diferentes elementos a serem considerados na gestão atualmente, os aspectos culturais têm se colocado na centralidade das discussões organizacionais. Essa posição deriva do fato de que a vantagem competitiva sustentável se origina da compreensão, respeito e utilização das diferenças de hábitos, práticas, pontos de vistas e competências. Empresas com atuação local ou global precisam atentar para as características oriundas de seu capital humano. O presente trabalho busca apresentar algumas evidências das implicações culturais a partir do prisma das dimensões culturais. Para isso é realizada uma breve revisão sobre o tema, em seguida são discutidas algumas repercussões para as organizações.

  13. Natural antibodies in paracoccidioidomycosis Anticorpos naturais na paracoccidioidomicose

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    Carmelinda S. Unterkircher

    2004-06-01

    Full Text Available Recent attention has been focused on the natural antibodies as a component of natural immunity and as integral part of the idiotypic network. However, their functional role in different infections has rarely been studied. This work was undertaken to investigate the presence of natural antibodies in paracoccidioidomycosis (PCM. In addition, we analyzed anti-P. brasiliensis antibodies and their distribution in IgG subclasses in order to acquire better knowledge about the humoral immune response in this mycosis. Our findings show that the natural antibody response is not very much increased in PCM when compared with other parasite infections and this response is restricted to a few specificities, suggesting that P. brasiliensis moderately triggers CD5+ B cells. The anti-actin antibody was the main antibody specificity found in PCM. Specific antibodies to P. brasiliensis were mainly found in the IgG1 subclass in chronic patients of PCM.Recente atenção tem sido dada aos anticorpos naturais como componentes da imunidade natural e como parte integrante da rede idiotípica. Todavia, seu papel funcional em diferentes infecções tem, raramente, sido estudado. O objetivo deste trabalho foi investigar a presença de anticorpos naturais na paracoccidioidomicose (PCM. Em adição, analisamos os anticorpos específicos anti-P. brasiliensis e sua distribuição em subclasses a fim de adquirir mais conhecimento sobre a resposta imune humoral nesta micose. Nossos achados mostram que a resposta de anticorpos naturais não é acentuada na PCM quando comparada com outras infecções por parasitas e, é restrita a poucas especificidades, sugerindo que o P. brasiliensis estimula moderadamente as células B CD5+. O anticorpo anti-actina foi a principal especificidade encontrada na PCM. Os anticorpos especificos para P. brasiliensis, nos pacientes crônicos, eram, principalmente, da subclasse IgG1.

  14. La sinergia institucional en la gerencia de la explotación minera en Colombia

    OpenAIRE

    Aristizábal Peña, Lina Paola

    2014-01-01

    El interés de este trabajo de grado es analizar el concepto de coordinación inter-agencial y trasladarlo a la práctica, para entender el funcionamiento de dos grandes agencias que gerencian el tema minero en el país: la Agencia Nacional de Minería y la Agencia Nacional de Licencias Ambientales. A partir de lo anterior, se demostrará que la falta de sinergia entre estas agencias es producto de la improvisación en la creación institucional; de la inestabilidad de las normas que las regulan y su...

  15. Tecnologia e "Morte Natural": o morrer na contemporaneidade Technology and "Natural Death": dying in contemporary society

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    Rachel Aisengart Menezes

    2003-12-01

    Full Text Available O desenvolvimento de técnicas voltadas ao prolongamento da vida acarretou mudanças significativas na concepção de morte. Este artigo analisa as representações contemporâneas da "morte natural" e sua relação com o uso de tecnologias médicas. Através de revisão bibliográfica, são examinadas as concepções de "morte natural" e de "morrer bem" construídas pelos diversos atores sociais envolvidos no processo do morrer. A literatura evidencia a construção contemporânea de um ideário e de uma trajetória necessários à realização do modelo da "boa morte". Esse modelo do "morrer bem" é construído em contraposição ao uso de técnicas para o prolongamento da vida. Estudos apontam a complexidade e ambivalência presentes no que seriam a morte natural ou não-natural, pois essas representações se encontram imbricadas com a concepção da "boa morte" como escolhida e produzida pelo doente. Deste modo, a tecnologia médica torna-se intrinsecamente constitutiva do "morrer natural".The development of techniques to prolong life has brought significant changes in the conceptualization of death. This article analyzes contemporary representations of "natural death" and their relationship to the use of medical technologies. Based on a literature review, the article examines the concepts of "natural death" and "dying well" constructed by the various social actors involved in the process of dying. The literature reveals the contemporary construction of a necessary set of ideals and pathway for achieving the model of a "good death". The "dying well" model is constructed in opposition to techniques for prolonging life. The studies point to the complexity and ambivalence of what is presented as "natural" versus "unnatural" death, since such representations are intertwined with the concept of a "good death" as that which is "chosen and produced" by the patient. Thus, medical technology becomes intrinsically constitutive for a "natural death".

  16. Synthesis and characterization of mesoporous NaY zeolite from natural Blitar’s kaolin

    Science.gov (United States)

    Khalifah, S. N.; aini, Z. N.; Hayati, E. K.; Aini, N.; Prasetyo, A.

    2018-03-01

    Mesoporous NaY Zeolite has been synthesized from calcined natural Blitar’s kaolin with the addition of NaOH and CTABr surfactant as mesoporous template by hydrothermal method. Natural kaolin was calcinated with different time and temperature to change kaolin to metakaolin. X-ray diffraction data showed that mesoporous NaY zeolite was formed with impurities compound of sodalite, kaolin and quartz phases. The BET analysis resulted that the pore of NaY Zeolite belongs to mesoporous type with pore size 9,421 nm. Characterization from FTIR confirmed about the functional group of zeolites (988, 776, 663, 464 cm-1). Scanning electron microscopy characterization showed that the morphological of mesoporous NaY zeolites have uniform and crystalline particles formed.

  17. Simbolismo sobre "natural" na alimentação Symbolism on "natural" in food

    Directory of Open Access Journals (Sweden)

    Maria Claudia da Veiga Soares Carvalho

    2011-01-01

    Full Text Available Os sentidos incorporados representam um acervo de possibilidades para a vida futura capaz de construir identidades individuais e coletivas. Este trabalho aprofunda os habitus, nos termos de Bourdieu, associados aos estilos "natural" e fast-food, fazendo uma análise interpretativa das trocas simbólicas de elementos reproduzidos nas práticas de alimentação. Consideramos que o arranjo "bricolista" desses elementos possibilita permutas e hibridismos, marcado por uma tensão que reflete a insegurança das inovações tecnológicas. O "natural" é o representante do ideal de autossustentabilidade, da produção não poluidora, que aponta para um enfrentamento da crise sanitária e ecológica do planeta, resistindo à industrialização em larga escala e à urbanização acelerada, entendidos como fatores de depredação das condições básicas de vida. As trocas se dão em um jogo simbólico articulado com o econômico global, em que os atores sociais fazem apostas, illusio, de acordo com intenções particulares na ação concreta. Há chance para reformulação das regras do jogo "no jogo", pois ainda que com um equilíbrio precário de forças, com perdas para o lado mais fraco, um agente pode ter em seu acervo a possibilidade de não reproduzir as pressões da globalização alimentar, o que está distante do que possa aparecer como sobrenatural.The incorporated senses represent a set of possibilities for future life able to build individual and collective identities. This work deepens the habitus, in Bourdieu's terms, associated with "natural" and fast-food styles, making an interpretative analysis of symbolic exchanges of elements reproduced in feeding practices. We believe that this bricolage arrangement of elements enables bartering and hybridism, marked by a tension that reflects the insecurity of technological innovations. The "natural" style represents an ideal of self-sustainability, non-polluting production, which faces the sanitary

  18. Modelo multicritério para seleção de portfolio de projetos considerando sinergia

    OpenAIRE

    DUARTE, Marina Dantas de Oliveira

    2007-01-01

    O trabalho desenvolvido objetiva tratar o problema de seleção de portfolio de projetos e as particularidades que envolve. Apesar do considerável volume de estudos existentes, ainda não há um consenso quanto aos elementos que caracterizam esta abordagem, pois a maioria dos trabalhos utiliza o termo seleção de portfolio para designar seleção de projetos. Além disso, a existência de sinergia entre projetos é pouco abordada nos modelos que se propõem a resolver o problema. Portanto...

  19. Simbolismo sobre "natural" na alimentação

    OpenAIRE

    Carvalho,Maria Claudia da Veiga Soares; Luz,Madel Therezinha

    2011-01-01

    Os sentidos incorporados representam um acervo de possibilidades para a vida futura capaz de construir identidades individuais e coletivas. Este trabalho aprofunda os habitus, nos termos de Bourdieu, associados aos estilos "natural" e fast-food, fazendo uma análise interpretativa das trocas simbólicas de elementos reproduzidos nas práticas de alimentação. Consideramos que o arranjo "bricolista" desses elementos possibilita permutas e hibridismos, marcado por uma tensão que reflete a inseguran...

  20. The natural history of surgically treated but radiotherapy-naïve nonfunctioning pituitary adenomas.

    LENUS (Irish Health Repository)

    O'Sullivan, Eoin P

    2009-11-01

    Transsphenoidal surgery is indicated for patients with nonfunctioning pituitary adenomas (NFPAs) causing compressive symptoms. Previous studies attempting to define the rate of recurrence\\/regrowth of surgically treated but radiation-naïve NFPAs were somewhat limited by selection bias and\\/or small numbers and\\/or lack of consistency of findings between studies. A better understanding of the natural history of this condition could allow stratification of recurrence risk and inform future management. We aimed to define the natural history of a large, mainly unselected cohort with surgically treated, radiotherapy (RT)-naïve NFPAs and to try to identify predictors of recurrence\\/regrowth.

  1. Synthesis of Zeolite NaA from Low Grade (High Impurities) Indonesian Natural Zeolite

    OpenAIRE

    Mustain, Asalil; Wibawa, Gede; Nais, Mukhammad Furoiddun; Falah, Miftakhul

    2014-01-01

    The zeolite NaA has been successfully synthesized from the low grade natural zeolite with high impurities. The synthesis method was started by mixing natural zeolite powder with NH4Cl aqueous solution in the reactor as pretreatment. The use of pretreatment was to reduce the impurities contents in the zeolite. The process was followed by alkaline fusion hydrothermal treatment to modify the framework structure of natural zeolite and reduce the SiO2/Al2O3 ratio. Finally, the synthesized zeolite ...

  2. Optically stimulated luminescence of natural NaCl mineral from Dead Sea exposed to gamma radiation

    International Nuclear Information System (INIS)

    Roman L, J.; Cruz Z, E.; Pina L, Y. I.; Marcazzo, J.

    2016-10-01

    Luminescence properties such as radioluminescence, thermoluminescence and optically stimulated luminescence have been studied on natural sodium chloride (NaCl) for dosimetric purposes in retrospective dosimetry (Timar-Gabor et al., 2013; Druzhyna et al., 2016). In this work, the optically stimulated luminescence (Cw-OSL) emissions of natural salt minerals, collected from Dead Sea in summer of 2015, were studied. The Cw-OSL dose response of natural salt was analyzed in the range between 0.2 and 10 Gy gamma dose of "6"0Co. Samples exposed at 3 Gy exhibited good repeatability with a variation coefficient of 4.6%. The thermal stability of the Cw-OSL response was analyzed to different temperatures from 50 up to 250 degrees Celsius using a heating rate of 5 degrees Celsius. The results showed that the natural Dead Sea salt minerals could be applied as natural dosimeter of gamma radiation. (Author)

  3. Optically stimulated luminescence of natural NaCl mineral from Dead Sea exposed to gamma radiation

    Energy Technology Data Exchange (ETDEWEB)

    Roman L, J.; Cruz Z, E. [UNAM, Instituto de Ciencias Nucleares, Ciudad Universitaria, 04510 Ciudad de Mexico (Mexico); Pina L, Y. I. [UNAM, Facultad de Ciencias, Ciudad Universitaria, 04510 Ciudad de Mexico (Mexico); Marcazzo, J., E-mail: jesus.roman@nucleares.unam.mx [Instituto de Fisica Arroyo Seco - UNICEN, Pinto 399, 7000 Tandil (Argentina)

    2016-10-15

    Luminescence properties such as radioluminescence, thermoluminescence and optically stimulated luminescence have been studied on natural sodium chloride (NaCl) for dosimetric purposes in retrospective dosimetry (Timar-Gabor et al., 2013; Druzhyna et al., 2016). In this work, the optically stimulated luminescence (Cw-OSL) emissions of natural salt minerals, collected from Dead Sea in summer of 2015, were studied. The Cw-OSL dose response of natural salt was analyzed in the range between 0.2 and 10 Gy gamma dose of {sup 60}Co. Samples exposed at 3 Gy exhibited good repeatability with a variation coefficient of 4.6%. The thermal stability of the Cw-OSL response was analyzed to different temperatures from 50 up to 250 degrees Celsius using a heating rate of 5 degrees Celsius. The results showed that the natural Dead Sea salt minerals could be applied as natural dosimeter of gamma radiation. (Author)

  4. Natural variants of AtHKT1 enhance Na+ accumulation in two wild populations of Arabidopsis.

    Directory of Open Access Journals (Sweden)

    Ana Rus

    2006-12-01

    Full Text Available Plants are sessile and therefore have developed mechanisms to adapt to their environment, including the soil mineral nutrient composition. Ionomics is a developing functional genomic strategy designed to rapidly identify the genes and gene networks involved in regulating how plants acquire and accumulate these mineral nutrients from the soil. Here, we report on the coupling of high-throughput elemental profiling of shoot tissue from various Arabidopsis accessions with DNA microarray-based bulk segregant analysis and reverse genetics, for the rapid identification of genes from wild populations of Arabidopsis that are involved in regulating how plants acquire and accumulate Na(+ from the soil. Elemental profiling of shoot tissue from 12 different Arabidopsis accessions revealed that two coastal populations of Arabidopsis collected from Tossa del Mar, Spain, and Tsu, Japan (Ts-1 and Tsu-1, respectively, accumulate higher shoot levels of Na(+ than do Col-0 and other accessions. We identify AtHKT1, known to encode a Na(+ transporter, as being the causal locus driving elevated shoot Na(+ in both Ts-1 and Tsu-1. Furthermore, we establish that a deletion in a tandem repeat sequence approximately 5 kb upstream of AtHKT1 is responsible for the reduced root expression of AtHKT1 observed in these accessions. Reciprocal grafting experiments establish that this loss of AtHKT1 expression in roots is responsible for elevated shoot Na(+. Interestingly, and in contrast to the hkt1-1 null mutant, under NaCl stress conditions, this novel AtHKT1 allele not only does not confer NaCl sensitivity but also cosegregates with elevated NaCl tolerance. We also present all our elemental profiling data in a new open access ionomics database, the Purdue Ionomics Information Management System (PiiMS; http://www.purdue.edu/dp/ionomics. Using DNA microarray-based genotyping has allowed us to rapidly identify AtHKT1 as the casual locus driving the natural variation in shoot Na

  5. Radiation induced color center and colloid formation in synthetic NaCl and natural rock salt

    International Nuclear Information System (INIS)

    Levy, P.W.; Swyler, K.J.; Klaffky, R.W.

    1979-01-01

    F-center and colloid particle formation has been studied in synthetic NaCl and natural rock salt crystals with apparatus for making optical absorption measurements during irradiation. F-center and colloid formation are functions of temperature, dose, dose rate, strain applied prior to irradiation and numerous other factors. Many of the observed properties are in accord with the Jain-Lidiard theory for radiation induced F-center and colloid growth above room temperature

  6. Validation of SINERGIA as training tool: a randomized study to test the transfer of acquired basic psychomotor skills to LapMentor.

    Science.gov (United States)

    Moyano-Cuevas, J L; Sánchez-Margallo, F M; Sánchez-Peralta, L F; Pagador, J B; Enciso, S; Sánchez-González, P; Gómez-Aguilera, E J; Usón-Gargallo, J

    2011-11-01

    Laparoscopic surgery is commonly used in many surgical procedures but requires a learning process to develop the necessary skills. Virtual reality simulators play an essential role within the training curricula. This paper aims to determine whether training in SINERGIA VR simulator allows novice surgeons to improve their basic psychomotor laparoscopic skills. Forty-two people participated in this study, including 28 unexperience medical students and 14 expert surgeons who developed previously more than 100 laparoscopic procedures. Medical students made a pre-training test in LapMentor II; then, they trained in SINERGIA and they finally accomplished a post-training test in LapMentor II. Experts just made one trial in LapMentor II. A statistical analysis was carried out and results of pre- and post-training tests of novices were compared with Wilcoxon signed-rank test. Pre- and post-training tests of novices were also compared with results of experts with Mann-Whitney U test. Most metrics provided by LapMentor II and included in this study show significant differences when comparing pre- and post-training tests of novices. Analysis of pre-training test of novices and experts results show significant differences in all analyzed metrics for all studied tasks. On the other hand, LapMentor was not able to distinguish between experts and novices after training in SINERGIA for any metric in the camera manipulation task and for some metrics of the other tasks. Training in SINERGIA VR simulator allows improvement of basic psychomotor laparoscpic skills and transferring them to another virtual simulator. Therefore, it could be used in laparoscopic surgery training programs.

  7. Thermally stimulated depolarization currents in the natural fluorite; Correntes de despolarizacao termicamente estimuladas na fluorita natural

    Energy Technology Data Exchange (ETDEWEB)

    Valerio, Mario Ernesto Giroldo

    1986-12-31

    The present work deals with natural calcium fluoride from Criciuma, Santa Catarina. Thermally Stimulated Depolarization Currents (TSDC) can be used to determine the properties of dipole defects present in this crystal. The TSDC spectrum of this material shows three bands in the temperature range of 80 to 450 K. The first one, at 130 K, is due the dipoles formed by a trivalent impurity and an interstitial fluorine ion in the next nearest position of an impurity ion (nn R{sub s}{sup 3+} -F{sub i}{sup -}). The second one, at 102 k, is due to the presence of small aggregates of dipoles (like a dimer). The last band, at 360 k is due to the formation of Large Clusters. The continuous distribution model gave the best fit for these bands with mean activation energies of 0.41 eV, 0.595 eV and 1.02 eV for the first, second and third band respectively. Thermal treatments can modify the number of dipoles, dimers and clusters present in the crystal. The variation in the areas under each band can be used to measure this effect. In this work we used thermal treatments between 15 minutes and 10 hours and temperatures between 200 deg C and 500 deg C. For thermal treatments at 300 deg C, the dipoles and dimers are created and the clusters are destroyed as the time of thermal treatment increases. At 400 deg C the clusters are created and the dipoles and dimers and 350 deg C for the clusters. (author) 60 refs., 41 figs., 1 tab.

  8. Thermally stimulated depolarization currents in the natural fluorite; Correntes de despolarizacao termicamente estimuladas na fluorita natural

    Energy Technology Data Exchange (ETDEWEB)

    Valerio, Mario Ernesto Giroldo

    1987-12-31

    The present work deals with natural calcium fluoride from Criciuma, Santa Catarina. Thermally Stimulated Depolarization Currents (TSDC) can be used to determine the properties of dipole defects present in this crystal. The TSDC spectrum of this material shows three bands in the temperature range of 80 to 450 K. The first one, at 130 K, is due the dipoles formed by a trivalent impurity and an interstitial fluorine ion in the next nearest position of an impurity ion (nn R{sub s}{sup 3+} -F{sub i}{sup -}). The second one, at 102 k, is due to the presence of small aggregates of dipoles (like a dimer). The last band, at 360 k is due to the formation of Large Clusters. The continuous distribution model gave the best fit for these bands with mean activation energies of 0.41 eV, 0.595 eV and 1.02 eV for the first, second and third band respectively. Thermal treatments can modify the number of dipoles, dimers and clusters present in the crystal. The variation in the areas under each band can be used to measure this effect. In this work we used thermal treatments between 15 minutes and 10 hours and temperatures between 200 deg C and 500 deg C. For thermal treatments at 300 deg C, the dipoles and dimers are created and the clusters are destroyed as the time of thermal treatment increases. At 400 deg C the clusters are created and the dipoles and dimers and 350 deg C for the clusters. (author) 60 refs., 41 figs., 1 tab.

  9. Sinergia natural en la globalización: Suite ofimática y organizaciones flexibles e inteligentes

    OpenAIRE

    Alix Aguirre Andrade; Nelly Manasía Fernández

    2009-01-01

    Los servicios que presta la suite ofimática facilitan los procesos en las organizaciones, realizándolos en el espacio virtual, superando las limitaciones que impone la contextualización física. Las nuevas formas de emprender tareas utilizando componentes de la suite ofimática, incentivan la aplicación de las tecnologías de la información y comunicación como instrumentos estratégicos en suministrar respuestas a las organizaciones, en sectores públicos y privados. El objetivo de este artículo e...

  10. Comparison measure of natural radioactivity in environment specimen using HPGe and NaI(Tl) γ-ray spectrometer

    International Nuclear Information System (INIS)

    Zhou Chunlin; Han Feng; Li Tiantuo; Ma Wenyan; Di Yuming; Guo Huiping; Wu Yuelei

    2000-01-01

    The author reports the comparison results on natural radioactive nuclide contents of soil specimen from an uranium diggings with HPGe and NaI(Tl) γ-ray spectrometer. Relative method and athwart matrix method are used to analyze natural radioactive nuclide contents in samples of soil. The results are compared and are proven to be in accordance with each other

  11. Análisis de la Sinergia corporativa para la reducción de gastos de fletes en la ciudad de Quito y Guayaquil para las empresas Poliquim y Pintec

    OpenAIRE

    Zambrano L., Emma; Orellana L., Cristina

    2012-01-01

    La investigación responde a la necesidad de las empresas Pintec y Poliquim, de alinear e integrar sus procesos acorde a la estrategia que se está desarrollando, crecer dentro del mercado y a su vez posicionarse como empresas de estándar multinacional y poder, a partir de una sinergia, mejorar una problemática dentro del área Logística. El objetivo principal será proponer una estrategia de mejora a través de la sinergia corporativa para la reducción de los gastos de fletes en la ciudad de Qui...

  12. Los programas radiofónicos españoles de prime time en Facebook y Twitter: Sinergias entre la radio convencional y las redes sociales

    Directory of Open Access Journals (Sweden)

    M Gutiérrez

    2014-07-01

    Full Text Available Introducción: Operadores públicos y privados de las emisoras radiofónicas generalistas buscan en las redes sociales nuevas formas de explotación de contenidos que generen cambios en la cadena de valor de la marca y desarrollen un modelo de negocio diferente. Objetivos: Definir las sinergias entre la radio convencional y las redes sociales en la radio generalista española a partir del análisis de cuatro programas de prime-time considerados máximos exponentes de la marca radiofónica. Metodología: A través de la técnica cuantitativa de análisis de contenido se estudian los roles del emisor y la audiencia en las redes sociales y la radio convencional. Conclusión: Pese a la ampliación de las vías para la participación de la audiencia, el estudio demuestra una ausencia casi total de interacción lo que exige el establecimiento de sinergias entre la radio convencional y las redes sociales como estrategia para explotar el potencial de estos espacios virtuales.

  13. Study on the natural gas utilization in the ceramic industry; Estudo sobre a utilizacao do gas natural na industria ceramica

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-07-01

    The production, principal applications, characteristics and properties, advantages of the gas natural is showed. A sectorial overview of the ceramic industry and the utilization of the natural gas in the ceramic industry is presented. The expectations are systematized and the impact of the natural gas utilization in the ceramic industry is evaluated. Some conclusions are withdrawn and recommendations suggested.

  14. Nonspecific nature of the vanadate inhibition of rat ileal (Na, K)-ATPase

    International Nuclear Information System (INIS)

    Hajjar, J.J.; Rowe, W.A.; Tomicic, T.K.

    1988-01-01

    Vanadate has been suggested as an intracellular regulator of (Na+ + K+)-ATPase. To test this hypothesis the authors examined the stimulatory and inhibitory effects of vanadate on 86 Rb efflux and influx (measurements of the activity of the Na-pump) in rat ileum under conditions of normal, reduced and increased (Na+ + K+)-ATPase activity. The half maximal inhibition of the Rb efflux and the half maximal inhibition of the Rb influx were not different in the three conditions tested. This suggests that vanadate does not have a regulatory effect on the activity of the Na-K-transport enzyme. The vanadate effect seem rather, to be nonspecific in terms of being unrelated, on a mole per mole basis, to the activity of the (Na+ + K+)-ATPase enzyme

  15. Nonspecific nature of the vanadate inhibition of rat ileal (Na, K)-ATPase

    Energy Technology Data Exchange (ETDEWEB)

    Hajjar, J.J.; Rowe, W.A.; Tomicic, T.K.

    1988-01-01

    Vanadate has been suggested as an intracellular regulator of (Na+ + K+)-ATPase. To test this hypothesis the authors examined the stimulatory and inhibitory effects of vanadate on /sup 86/Rb efflux and influx (measurements of the activity of the Na-pump) in rat ileum under conditions of normal, reduced and increased (Na+ + K+)-ATPase activity. The half maximal inhibition of the Rb efflux and the half maximal inhibition of the Rb influx were not different in the three conditions tested. This suggests that vanadate does not have a regulatory effect on the activity of the Na-K-transport enzyme. The vanadate effect seem rather, to be nonspecific in terms of being unrelated, on a mole per mole basis, to the activity of the (Na+ + K+)-ATPase enzyme.

  16. Sinergias numa fusão de empresas:estudo de caso aplicado à "Transportes Tejo à Vista. Soc.Unip.,Lda" e "Gomes&Paredes, Lda."

    OpenAIRE

    Jordão, Pedro Fernando Ferreira

    2014-01-01

    Dissertação, Mestrado, Contabilidade e Finanças, Instituto Politécnico de Santarém, Escola Superior de Gestão e Tecnologia, 2014 A principal motivação do estudo, passou por se tentar entender se a fusão das empresas em causa trará benefícios e se esta estratégia de reestruturação de empresas é vantajosa. O objetivo da realização deste estudo de caso, passa pelo cálculo dos custos e benefícios do processo de fusão de duas empresas, concluindo a presença ou não de Sinergias da fusão. Os obje...

  17. Previsão tecnológica de médio e longo prazo : bombas de calor e sinergia com energias renováveis

    OpenAIRE

    Antonio Carlos Ventilii Marques

    2013-01-01

    Resumo: O presente trabalho é um estudo de previsão tecnológica para bombas de calor e sua sinergia com energias renováveis. A previsão da evolução das tecnologias é uma atividade relevante para indústria e governos. Existem diversas metodologias à disposição para realizar este tipo de estudo. O domínio dessas metodologias pode trazer ganhos à sociedade ou ser uma condição necessária para a perenidade de empresas. A segurança energética é um tema relevante que induz a procura por alternativas...

  18. Calibration with MCNP of NaI detector for the determination of natural radioactivity levels in the field.

    Science.gov (United States)

    Cinelli, Giorgia; Tositti, Laura; Mostacci, Domiziano; Baré, Jonathan

    2016-05-01

    In view of assessing natural radioactivity with on-site quantitative gamma spectrometry, efficiency calibration of NaI(Tl) detectors is investigated. A calibration based on Monte Carlo simulation of detector response is proposed, to render reliable quantitative analysis practicable in field campaigns. The method is developed with reference to contact geometry, in which measurements are taken placing the NaI(Tl) probe directly against the solid source to be analyzed. The Monte Carlo code used for the simulations was MCNP. Experimental verification of the calibration goodness is obtained by comparison with appropriate standards, as reported. On-site measurements yield a quick quantitative assessment of natural radioactivity levels present ((40)K, (238)U and (232)Th). On-site gamma spectrometry can prove particularly useful insofar as it provides information on materials from which samples cannot be taken. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  19. Análise do desempenho econômico-financeiro e da criação de sinergias em processos de fusões e aquisições do mercado brasileiro ocorridos entre 1995 e 1999 Performance and synergism of Brazilian mergers and acquisitions that occurred between 1995 and 1999

    Directory of Open Access Journals (Sweden)

    Marcos Antônio de Camargos

    2005-06-01

    Full Text Available Caracterizado pela concentração de capitais, reestruturação patrimonial, organizacional e societária, e por movimentos cíclicos (ondas, o fenômeno das fusões e aquisições vem redefinindo e modificando o ambiente empresarial e gerencial. Tal fenômeno pode ser visto como uma resposta das organizações ao ambiente cada vez mais competitivo da economia nacional e internacional. Neste artigo, faz-se uma análise do desempenho econômico-financeiro e da criação de sinergias em empresas brasileiras que passaram por processos de fusão ou aquisição entre 1995 e 1999, utilizando-se o arcabouço teórico da Análise Fundamentalista. O estudo foi empreendido por meio da comparação dos valores médios de índices no triênio anterior e no posterior à união das empresas. Identificou-se uma piora na situação financeira das empresas analisadas após a combinação, uma melhora na situação econômica e que tais processos geraram sinergias operacionais e gerenciais.Mergers and acquisitions are changing the business and management environment, which is characterized by capital concentration, organizational restructuring and cyclical movements. This may be viewed as a response of organizations to sharpening competition here as well as abroad. The theoretical framework of Fundamentalist Analysis was used to analyze the financial performance and synergism of Brazilian companies involved in mergers and acquisitions between 1995 and 1999. The average index values of these companies were compared in the triennium before and after the fact. Results showed a deterioration of the financial situation and an improvement of the economic situation accompanied by operational and managerial synergisms.

  20. Security resolution minute for natural gas distribution pipeline; Minuta de resolucao de seguranca na distribuicao do gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Teles, Marcus de Barros [ARCE - Agencia Reguladora de Servicos Publicos Delegados do Estado do Ceara, Fortaleza, CE (Brazil)

    2003-07-01

    In the current scenery of natural gas distribution regulation, there is no specific resolution about security. The security is boarded in few concession contracts of some private gas companies, but not as principal theme. The security resolution minute presented in this paper aim break the direct and indirect causes of accidents, eliminating their potential. In this new point of view, the quality of services is the principal cause to guarantee the security of natural gas distribution systems. The methodology used to develop the minute was based on the research of Brazilian and American resolutions of state regulation agencies, concession contracts of private distribution gas companies, American code of federal regulation, ASME code for pressure piping B31.8 - 1999 edition and the NBR 12712 standard. The result of the research was the elaboration of an specific minute resolution of security that can be used as reference in the fiscalization of the natural gas distribution piping companies activities. This minute, can be an important instrument to avoid accidents and incidents, eliminating prejudices to the people, to properties, to environment and to the image of natural gas distribution companies and regulation agencies. (author)

  1. Ibn Kamm´na on the Nature of Knowledge | Alper | Journal for ...

    African Journals Online (AJOL)

    philosopher Sa>d b. Man§´r Ibn Kamm´na (d. 683/1284), who is one of the most important and influential philosophers of the post-Avicennan period. In order to accomplish this aim, the article begins with a brief look at his view on the conception of ...

  2. Radiation damage studies on synthetic NaCl crystals and natural rock salt for waste disposal applications

    International Nuclear Information System (INIS)

    Klaffky, R.W.; Swyler, K.J.; Levy, P.W.

    1979-01-01

    Radiation damage studies are being made on synthetic NaCl and natural rock salt crystals from various localities, including potential repository sites. Measurements are being made with equipment for recording the radiation induced F-center and colloid particle absorption bands during irradiation with 1.5 MeV electrons at various temperatures. A technique has been developed to resolve the overlapping F-center and colloid bands. The resulting spectra and curves of absorption vs. dose provide information on colloid particle size and concentration, activation energies for processes occurring during colloid formation, and additional data suggesting that both strain and radiation induced dislocations contribute to the colloid formation process

  3. Gamma radiation and the conservation of natural orange juice; Radiacao gama na conservacao do suco natural de laranja

    Energy Technology Data Exchange (ETDEWEB)

    Iemma, Juliana; Alcarde, Andre Ricardo; Domarco, Rachel Elisabeth; Spoto, Marta Helena Fillet; Blumer, Lucimara; Matraia, Clarice [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil). Lab. de Irradiacao de Alimentos e Radioentomologia]. E-mail: aalcarde@cena.usp.br

    1999-12-01

    The effect of gamma radiation was evaluated on the microbiological population, soluble solids content, acidity, p H and ascorbic acid content of natural orange juice. Microbial activity may cause deterioration of orange juice. Irradiation is a process of food conservation which eliminates microorganisms. nevertheless radiation may affect some characteristics of irradiated food. The experimental design was a 4 x 5 factorial scheme, including control and 3 rates of irradiation (2.0, 4.0 and 6.0 kGy) and 5 storage periods (1, 7, 14, 21 and 28 days), with 2 replicates. Samples of juice were extracted from variety Pera oranges and irradiated at a rate of 2.0 kGy/h ({sup 60} Cobalt) and thereafter stored at 5 +- 3 deg C. Results showed small changes in soluble solids content, acidity and p H, for all treatments. The ratio soluble solids/acidity was also determined and showed little variation for all treatments. There was a reduction on ascorbic acid content of the orange juice with increased radiation dosage and storage time. Gamma radiation was effective in reducing the microbiological population of the juice. (author)

  4. Synergies between Last Planner System and OHSAS 18001 - A general overview = Sinergias entre el Last Planner System y la OHSAS 18001 - Una visión general

    Directory of Open Access Journals (Sweden)

    Xavier Brioso

    2017-08-01

    Full Text Available The present article’s main objective is to describe the synergies generated from the simultaneous application of the Last Planner System (LPS and OHSAS 18001. We explain the main principles, tools, techniques and practices of the Lean Construction philosophy and LPS that integrate and make synergy with the elaboration of Safety and Health Study, the implementation of the Safety and Health Plan, and with the OHSAS 18001. The LPS elements are correlated with the OHSAS 18001 requirements: (1 Policy; (2 Planning; (3 Implementation and Operation; (4 Checking; and (5 Management Review. The methodology used to validate the proposal is based in a review of the published literature in the last years, in which information was quoted from the Conferences of the International Group for Lean Construction (IGLC, Lean Construction Journal, Lean Construction Institute, among others. This paper hopes to bring integration and collaborative work from the Production and the Safety and Health Department. Resumen El presente artículo tiene como objetivo describir las sinergias generadas en la aplicación simultánea del Last Planner System (LPS y la OHSAS 18001. Se explican los principios, herramientas, técnicas y prácticas de la filosofía Lean Construction y del LPS que integran y generan sinergia con la elaboración del Estudio de Seguridad y Salud, con la implementación del Plan de Seguridad y Salud y con la OHSAS 18001. Se relacionan los elementos del LPS con los requisitos OHSAS 18001: (1 Política; (2 Planificación; (3 Implementación y operación; (4 Verificación; y (5 Revisión por la Dirección. La metodología empleada para validar la propuesta se basa en una revisión de la literatura publicada en los últimos años, en la que se citó información de la Conferencia del International Group for Lean Construction (IGLC, Lean Construction Journal, Lean Construction Institute, entre otros. Este trabajo pretende aportar en la integración y el trabajo

  5. Diffusion of Na(I), Cs(I), Sr(II) and Eu(III) in smectite rich natural clay.

    Science.gov (United States)

    Kasar, Sharayu; Kumar, Sumit; Bajpai, R K; Tomar, B S

    2016-01-01

    Diffusion of Na(I), Cs(I), Sr(II) and Eu(III) in smectite rich natural clay, proposed as a backfill material in the Indian geological repository, was studied using the out-diffusion method. Radiotracers (22)Na, (137)Cs, (85)Sr and (154)Eu were used; the first three are carrier-free enabling experimental work at sub-micromolar metal ion concentration, and Eu(III) tracer (154)Eu was used at sub millimolar concentration. An out-diffusion methodology, wherein a thin planar source of radioactivity placed between two clay columns diffuses out, was used to obtain the apparent diffusion coefficient (Da) values. This methodology enabled determination of diffusion coefficient even for strongly sorbing (154)Eu. Da values for (22)Na, (137)Cs, (85)Sr and (154)Eu were 2.35 (±0.14) × 10(-11), 2.65 (±0.09) × 10(-12), 3.32 (±0.15) × 10(-11) and 1.23 (±0.15) × 10(-13) m(2) s(-1), respectively. Da values were found to be in fair agreement with literature data reported for similar mineralogical sediments. Sorption of radionuclides on the clay was also determined in the present study and differences in Da values were rationalized on the basis of sorption data. Distribution ratios (Kd) for Cs(I) and Eu(III) were higher than that for Sr(II), which in turn was higher than that for Na(I). Copyright © 2015 Elsevier Ltd. All rights reserved.

  6. Luz natural na micropropagação do abacaxizeiro (Ananas comosus L. Merr)

    OpenAIRE

    Bortolotti da Silva, Adriano; Pasqual, Moacir; Mauro de Castro, Evaristo; Yuriko Miyata, Luzia; Amaral de Melo, Lucas; Tavares Braga, Francyane

    2008-01-01

    Brotações de Ananas comosus cv. Imperial, foram enraizadas in vitro em diferentes condições ambientais (luz artificial e natural) e após dois meses as plântulas foram transferidas para substrato comercial (Plantmax®) em casa de vegetação. O crescimento das plantas e anatomia foliar foram avaliados em diferentes tempos (0, 7, 15, 30 e 60 dias) do processo de aclimatização. O emprego de luz natural durante a fase de enraizamento in vitro proporciona melhor desempenho agronômico e anatômico das ...

  7. Liberdade, lei natural e direito natural em Hobbes: limiar do direito e da política na modernidade Freedom, natural law and natural right in Hobbes: threshold of law and politics in modernity

    Directory of Open Access Journals (Sweden)

    Natalia Maruyama

    2009-01-01

    Full Text Available Liberdade e poder são dois temas que se correlacionam ao longo da história da filosofia política moderna. Nos textos de Hobbes, a ideia da liberdade como ausência de impedimentos às ações ajuda-nos a pensar o dever de obediência ao poder soberano e as relações entre política e direito. Uma situação de vácuo jurídico, em que tudo é permitido, faz-se, contudo, impossível, de modo que a solução de Hobbes consiste em sustentar a ideia do direito natural como direito originário individual vinculado à preservação da vida. Suas ideias do direito natural e da lei natural, que servem de fundamento ao dever de obediência ao soberano, amparam-se em princípios jurídicos, teológicos e biológicos. Tais princípios, entretanto, não dão conta da questão da extensão do poder soberano. Hobbes recorre à análise da linguagem. Sua teoria contratual afirma o princípio de preservação da vida na base da política e sustenta a ideia da criação e da manutenção do poder soberano no ato de linguagem implicado na estrutura representativa do pacto político.Liberty and power are two subjects correlated along the history of the political modern philosophy. In the texts of Hobbes, the idea of liberty as absence of impediments to the actions helps us to think the duty of obedience to the sovereign power and the relations between politics and right. A situation of legal vacuum, in which everything is allowed, is, nevertheless, impossible, so that the solution of Hobbes consists in supporting the idea of the natural right like original individual right linked to the preservation of the life. His ideas of the natural right and of the natural law, which serve of basis to the duty of obedience to a sovereign, lean on legal, theological and biological principles. In spite of that, such principles do not surround the question of the extension of the sovereign power. Hobbes resorts to the analysis of the language. His contractual theory affirms

  8. O álbum poético em português e em espanhol: sinergia estética entre palavras e ilustrações

    Directory of Open Access Journals (Sweden)

    SARA RAQUEL DUARTE REIS DA SILVA

    2017-01-01

    Full Text Available Este estudio ha tenido como objetivo discutir la relación textual que existe entre la palabra y la imagen en un tipo texto especialmente creado para niños: el álbum poético. Para ello, utilizamos algunos ejemplos textuales significativos de un subgénero literario en emergencia tanto en Portugal cuanto en España, y hemos propuesto una definición de este subgénero y su caracterización a partir del comentario de secuencias poéticas en las cuales la imagen sustenta el contenido verbal. De hecho, centrando la atención en el álbum poético de potencial recepción infantil y juvenil, proponemos un análisis de diversos títulos de autoría portuguesa y española basado en la lectura dialógica entre el texto verbal y el texto ilustrativo. La sinergia que se establece entre estos dos componentes enunciados facilita una nueva construcción estética que da pie, en su esencia, a un tipo de poesía que, en gran medida, es deudora de los efectos expresivos de la metáfora.

  9. NaDeA: A Natural Deduction Assistant with a Formalization in Isabelle

    DEFF Research Database (Denmark)

    Villadsen, Jørgen; Jensen, Alexander Birch; Schlichtkrull, Anders

    2017-01-01

    We present a new software tool for teaching logic based on natural deduction. Its proof system is formalized in the proof assistant Isabelle such that its definition is very precise. Soundness of the formalization has been proved in Isabelle. The tool is open source software developed in TypeScript...

  10. NaDeA: A Natural Deduction Assistant with a Formalization in Isabelle

    DEFF Research Database (Denmark)

    Villadsen, Jørgen; Jensen, Alexander Birch; Schlichtkrull, Anders

    2015-01-01

    We present a new software tool for teaching logic based on natural deduction. Its proof system is formalized in the proof assistant Isabelle such that its definition is very precise. Soundness of the formalization has been proved in Isabelle. The tool is open source software developed in TypeScript...

  11. Na-noparticles of activated natural zeolite on textiles for protection and therapy

    Directory of Open Access Journals (Sweden)

    Ivančica Kovaček

    2009-10-01

    Full Text Available Activated natural zeolite clinoptilolite is microporous hydrated aluminosilicates crystals with well-defined structures containing AlO4 and SiO4 tetrahedral linked through the common oxygen atoms. It is to point out that zeolites act as strong adsorbents and ion-exchangers but having many other useful properties. Due to its cationexchange ability, zeolites have catalytic properties and, for that, multiple uses in medicine and industry, agriculture, water purification and detergents. Zeolites are nontoxic substance, excellent for UVR and microbes protection, for proteins and small molecules such as glucose adsorption. In this paper its positive effect on the metabolism of living organisms and its anticancerogenic, antiviral, antimetastatic and antioxidant effect. The activity of natural zeolite as natural immunostimulator was presented as well as its help in healing wounds. Therefore, the present paper is an attempt to modify cotton (by mercerization and polyester (by alkaline hydrolysis fabrics for summer clothing with addition of natural zeolite nanoparticles for achieving UV and antibacterial protective textiles

  12. Florística na Reserva Particular do Patrimônio Natural Complexo Serra da Farofa, estrutura e efeitos ambientais da antropização na comunidade arbustivo-arbórea, Santa Catarina, Brasil

    OpenAIRE

    Floriani, Mireli Moura Pitz

    2015-01-01

    A Floresta Ombrófila Mista (FOM) pertence ao Bioma Mata Atlântica e trata-se de uma formação florestal rica em espécies vegetais endêmicas, ocorrente preferencialmente na região Sul do Brasil. O trabalho teve como objetivo conhecer a composição florística, a estrutura e os efeitos ambientais da antropização na comunidade arbustivo-arbórea na Reserva Particular do Patrimônio Natural Estadual Complexo Serra da Farofa (Bloco VI) no município de Rio Rufino, Santa Catarina. O ...

  13. Crise ambiental e ensino de ecologia : o conflito na relação homem-mundo natural

    OpenAIRE

    Dorotea Cuevas Fracalanza

    1992-01-01

    Resumo: Há duas décadas o currículo de Biologia para as escolas de segundo grau não incluía, com o mesmo destaque de hoje, temas como a Ecologia e a Questão Ambiental. A crescente importância desses assuntos e a estreita vinculação entre eles são sinais de uma mudança de sensibilidade na relação entre o Homem e o Mundo Natural. Atualmente, esta se apresenta sob a influência de dois pontos de vista conflitantes: o domínio do Homem sobre a Natureza'e a sujeição do mesmo às leis enunciadas pela ...

  14. A relação corpo-natureza na modernidade The body-nature relation in the Modernity

    Directory of Open Access Journals (Sweden)

    Dulce Suassuna

    2005-04-01

    Full Text Available O trabalho apresenta uma reflexão teórica sobre o significado da relação corpo-natureza tomando como contexto a modernidade. O debate teórico proposto subsidia-se na teoria social, seguindo como referencial o pensamento weberiano no que concerne à sua visão sobre a modernidade. Ampara-se em Habermas para mostrar que na modernidade o quadro configurado se constrói por meio de rupturas que se processam como conseqüências patológicas do mundo natural, momento em que se permite discutir a relação homem (corpo e meio ambiente (natureza. A recuperação da contribuição de Habermas ocorreu por meio do texto clássico Teoria da Ação Comunicativa e da leitura de Goldblatt no seu livro Teoria Social e Ambiente. Além desses autores, outros são utilizados dentro dessa linha de pensamento, entretanto, pretendendo-se fugir da visão instrumentalista, buscou-se em Mauss, por meio da teoria do fato social total e da noção de técnicas corporais, um esforço teórico para uma possível justificativa da perspectiva da interdisciplinaridade entre o campo disciplinar das Ciências Sociais e a Educação Física e, por conseguinte, do desporto.This paper presents a theoretical reflection about the meaning of the body-nature relation, taking Modernity as a context. The theoretical discussion proposed here is subsidized by the social theory, following the weberian thinking as a reference, where it concerns the view of Modernity. It uses Habermas to show that in modernity the shaped picture is built by means of breaches which occur as pathological consequences of the natural world; moment in which the man (body-environment (nature relation can be discussed. The recovery of the contribution of Habernas happened through the classic text Theory of the Communicative Action and the reading of Goldblatt in his book Social and Environment Theory. Besides these authors, others are used within this line of thought. However, attempting to dodge the

  15. Cultivo de beterraba em ambientes protegido e natural na época de verão

    Directory of Open Access Journals (Sweden)

    João A. Tullio

    2013-10-01

    Full Text Available Objetivou-se neste trabalho avaliar as respostas produtivas de beterraba cultivada em ambiente natural e sob túnel com malha de sombreamento durante a época de verão. O delineamento experimental foi blocos ao acaso com quatro repetições e os tratamentos arranjados em parcela sub-subdividida tendo, como fator primário, os ambientes de cultivo (protegido e natural, como fator secundário, as cultivares (Itapuã 202 e Tall Top Early Wonder além das épocas de colheita (13, 26, 39, 52 e 65 dias após o transplante como fator terciário. Foram avaliados número de folhas, fitomassas fresca e seca da parte aérea, fitomassa fresca da raiz tuberosa, índice de área foliar, altura da planta e presença ou não de aneis esbranquiçados na raiz tuberosa. Em cada ambiente de cultivo foram instalados sensores para medidas da radiação fotossinteticamente ativa e temperatura do ar. O cultivo de beterraba sob túnel resultou em menor fitomassa fresca da raiz tuberosa e maior fitomassa fresca da parte aérea quando comparadas àquelas do cultivo em ambiente natural. O cultivo de beterraba sob túnel coberto com telado preto 70% não apresentou vantagens em relação ao cultivo em ambiente natural no que diz respeito às características de produção e à qualidade da raiz de beterraba.

  16. Radiação gama na conservação do suco natural de laranja

    Directory of Open Access Journals (Sweden)

    Iemma Juliana

    1999-01-01

    Full Text Available Este trabalho estudou o efeito da radiação gama na população microbiológica, teor de sólidos solúveis, acidez titulável, pH and conteúdo de vitamina C do suco natural de laranja. A atividade microbiana pode causar a deterioração do suco de laranja. A irradiação é um processo de conservação de alimentos através da eliminação dos microrganismos, porém pode afetar algumas características do produto. O delineamento experimental foi em esquema fatorial 4x5 referentes ao controle mais 3 doses de radiação (2,0; 4,0 and 6.0 kGy e 5 períodos de armazenamento (1, 7, 14, 21 e 28 dias com 2 repetições. As amostras de suco natural foram extraídas de laranjas da variedade "Pêra", irradiadas a uma taxa de dose de 2,0 kGy por hora (cobalto-60, e em seguida foram armazenadas sob refrigeração (5 ± 3ºC. Os resultados mostraram pequenas variações no teor de sólidos solúveis, acidez titulável e pH, em relação aos tratamentos testados. A razão sólidos solúveis/acidez titulável foi determinada e também mostrou pequena variação em todos os tratamentos. Com o aumento da dose de radiação e o prolongamento do período de armazenamento houve redução no conteúdo de vitamina C do suco. A radiação gama se mostrou eficaz na redução da população microbiana do suco de laranja.

  17. A introdução dos estudos de história natural na reforma pombalina-o quadro cultural e o movimento das ideias

    OpenAIRE

    Brigola, João

    2012-01-01

    Idenficam-se os autores e as ideias que, no período joanino, influenciaram o movimento de reforma da Universidade de Coimbra, cujo elemento mais inovador se corporizou na criação de duas novas faculdades (a de Matemática e a de Filosofia Natural) e na alteração programática profunda na de Medicina. Referência aos nomes dos professores mais inflentes neste período, aos Estatutos e à criação de novos equipamentos pedagógicos e científicos: jardim botânico; gabinete de história natural; gabinete...

  18. Preparation of sol-gel TiO2/purified Na-bentonite composites and their photovoltaic application for natural dye-sensitized solar cells

    International Nuclear Information System (INIS)

    Saelim, Ni-on; Magaraphan, Rathanawan; Sreethawong, Thammanoon

    2011-01-01

    Highlights: → Natural dye from red cabbage was successfully employed in DSSC. → A fast sol-gel method to produce TiO 2 /clay thin film was proposed. → The sol-gel-prepared TiO 2 /clay was applied as the scattering layer on top of TiO 2 electrode. → Thicker sol-gel-prepared TiO 2 /clay electrode showed higher DSSC efficiency. - Abstract: The sol-gel TiO 2 /purified natural clay electrodes having Ti:Si molar ratios of 95:5 and 90:10 were initially prepared, sensitized with natural red cabbage dye, and compared to the sol-gel TiO 2 electrode in terms of physicochemical characteristics and solar cell efficiency. The results showed that the increase in purified Na-bentonite content greatly increased the specific surface area and total pore volume of the prepared sol-gel TiO 2 /purified Na-bentonite composites because the clay platelets prevented TiO 2 particle agglomeration. The sol-gel TiO 2 /5 mol% Si purified Na-bentonite and sol-gel TiO 2 /10 mol% Si purified Na-bentonite composites could increase the film thickness of solar cells without cracking when they were coated as a scattering layer on the TiO 2 semiconductor-based film, leading to increasing the efficiency of the natural dye-sensitized solar cells in this work.

  19. Alterações na matéria orgânica e na biomassa microbiana em solo de mata natural submetido a diferentes manejos Changes in organic matter and in microbial biomass of a natural forest soil under different management

    Directory of Open Access Journals (Sweden)

    MILTON MARCHIORI JÚNIOR

    2000-06-01

    Full Text Available Avaliou-se, em um Latossolo Roxo, o efeito de diferentes formas de manejo do solo sobre a matéria orgânica do solo e na biomassa microbiana. Os tratamentos usados foram: mata natural; mata natural até 1976 e café até 1994 (amostragem na projeção da copa e na entrelinha; mata natural até 1976, café até 1991 e milho até 1994; mata natural até 1940, café até 1960, citros até 1978, e cana-de-açúcar até 1994 (amostragem na linha e na entrelinha. A mata natural apresentou os maiores valores de C orgânico no solo e na fração humina e os menores valores foram obtidos nas áreas com cana-de-açúcar, que apresentaram os maiores valores de C microbiano em relação à mata natural. O uso agrícola do solo aumentou a porcentagem de C orgânico na forma de ácidos húmicos e fúlvicos, em relação à mata natural. Em geral, o solo apresentou mais de 74% do C orgânico na forma de húmus residual.The effect of soil management on forms of carbon and microbial biomass was studied in a Typic Euthortox soil. The treatments tested were: natural forest; natural forest till 1976 and coffee till 1994 (sampling on the shoot projection and between lines ; natural forest till 1976, coffee till 1991 and corn till 1994; natural forest till 1940, coffee till 1960, citrus till 1978 and sugar cane till 1994 (sampling on the planting line and between lines . The treatment with sugar cane presented the largest values of microbial carbon in relation to the natural forest. The agricultural management of soil increased the percentage of organic carbon in humic and fulvic acids forms. The soil presented more than 74% of organic carbon in the form of residual humus.

  20. Efeitos da adubação com dejetos suínos, cama de aves e fosfato natural na recuperação de pastagens degradadas

    Directory of Open Access Journals (Sweden)

    Gabriel Felipe Vogel

    2014-05-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE MicrosoftInternetExplorer4 O uso inadequado de áreas exploradas pela atividade pecuária tem sido uma das principais causas do declínio na fertilidade natural dos solos destas áreas, o que leva a degradação das pastagens. Uma alternativa que vêm se destacando na busca da sustentabilidade na recuperação dos solos degradados é a utilização de adubos orgânicos. O presente trabalho tem por objetivo expor pesquisas realizadas no Brasil com relação ao uso de adubos orgânicos na recuperação de pastagens degradadas. Tanto a utilização de adubação orgânica como de fosfato natural tem se mostrado alternativas promissoras na recuperação de pastagens degradadas em avaliações a curto prazo. Porém, verifica-se a necessidade de acompanhamentos a longo prazo do efeito do uso destas fontes, em especial aos adubos orgânicos, devido a dinâmica complexa destes adubos no solo e ao efeito que podem gerar no sistema.

  1. CARS spectroscopy of the NaH2 collision complex: The nature of the Na(3 2P)H2 exciplex - ab initio calculations and experimental results

    International Nuclear Information System (INIS)

    Vivie-Riedle, R. de; Hering, P.; Kompa, K.L.

    1990-01-01

    CARS has been used to analyze the rovibronic state distribution of H 2 after collision with Na(3 2 P). New lines, which do not correspond to H 2 lines are observed in the CARS spectrum. The experiments point to the formation of a complex of Na(3 2 P)H 2 in A 2 B 2 symmetry. Ab initio calculations of the A 2 B 2 potential were performed. On this surface the vibrational spectra of the exciplex is evaluated. The observed lines can be attributed to vibrational transitions in the complex, in which combinational modes are involved. The connection of experimental and theoretical results indicates that a collisionally stabilized exciplex molecule is formed during the quenching process. (orig.)

  2. Regeneração natural em fragmentos de floresta ombrófila densa na Bacia do Rio Capibaribe, Pernambuco.

    OpenAIRE

    Aldení Silva de Lima

    2011-01-01

    Os fragmentos florestais ciliares são de grande importância para manutenção da diversidade biológica, pois atuam como corredores ecológicos, facilitando a dispersão animal e vegetal entre áreas, além de auxiliarem na regularização do regime hídrico e na estabilidade dos solos. Assim, o presente trabalho objetivou caracterizar a fitossociologia do componente lenhoso regenerante em áreas ciliares, visando avaliar o potencial de regeneração natural em cinco fragmentos de Floresta Ombrófila Densa...

  3. A model to investigate the optimal seeder-to-naïve ratio for successful natural Mycoplasma hyopneumoniae gilt exposure prior to entering the breeding herd.

    Science.gov (United States)

    Roos, Luiza R; Fano, Eduardo; Homwong, Nitipong; Payne, Brian; Pieters, Maria

    2016-02-29

    Due to the significance of Mycoplasma hyopneumoniae as a swine respiratory pathogen, acclimation measures are taken into consideration when obtaining replacement gilts from negative sources to be introduced to endemically infected herds. The aim of this study was to evaluate the optimum seeder-to-naïve gilt ratio in a 4-week period for successful natural exposure to M. hyopneumoniae. Sixty gilts were divided in two groups, 21 2-week old seeder gilts were inoculated with M. hyopneumoniae, and 39 aged-matched naïve gilts were exposed to the seeders during a 4-week period. The exposure was set by dividing the gilts into six groups of 10 with different ratios of seeder-to-naïve, from 1:9 until 6 seeders and 4 naïve gilts. Laryngeal swabs, oral fluids and blood samples were collected from all gilts prior to, during and after inoculation and exposure. Infection in seeders was confirmed by development of clinical signs, seroconversion post-inoculation, and detection of M. hyopneumoniae genetic material. Naïve were considered positive after 4 weeks if M. hyopneumoniae was detected on bronchial swab or fixed lung tissue. As result, 33% (3/9) naïve gilts were positive in the 1:9 ratio, 75% (6/8) in 2:8, 28% (2/7) in 3:7, 33% (2/6) in 4:6, 80% (4/5) in 5:5 and 100% (4/4) in the 6:4 ratio. The estimated transmission rate (β) and expected probability of infection (ψ) were 1.28 per pig/week and 0.6, respectively. In this study, six seeders were required in a group of 10 gilts for successful exposure to M. hyopneumoniae in a 4-week exposure period. Copyright © 2016 Elsevier B.V. All rights reserved.

  4. ESTUDO DA REGENERAÇÃO NATURAL, BANCO DE SEMENTES E CHUVA DE SEMENTES NA RESERVA GENÉTICA FLORESTAL DE CAÇADOR, SC

    Directory of Open Access Journals (Sweden)

    Solon Jonas Longhi

    1996-12-01

    Full Text Available Este estudo foi realizado na Reserva Genética Florestal de Caçador, no Estado de Santa Catarina no período de agosto de 1995 a janeiro de 1996. Para o estudo da regeneração natural foram instaladas 10 parcelas de 250 m² (10m x 25m. No interior das mesmas foram coletados a camada de solo juntamente com a serapilheira em até 3cm de profundidade em 40 pontos amostrais de 0,5m x 0,5m para a análise do banco de sementes no solo, e instalados 20 coletores com área de 0,5 m x 0,5 m para a avaliação da chuva de sementes. Os resultados mostram que apesar da Araucaria angustifolia ser a espécie dominante no estrato superior da floresta não apresenta indivíduos na regeneração natural e a Mimosa scabrella foi a espécie arbórea mais importante presente no banco de sementes no solo. As relações entre os três parâmetros avaliados evidenciam uma distribuição irregular das espécies na área de estudo.

  5. Efeito do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio Effect of residual lignin content and nature on the efficiency and selectivity of ozone bleaching

    Directory of Open Access Journals (Sweden)

    Elenice Pereira Maia

    2003-04-01

    Full Text Available Neste estudo foram avaliados os efeitos do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio de polpa kraft convencional (kraft e pré-deslignificada com oxigênio (kraft-O. Constatou-se que a eficiência do branqueamento com ozônio se eleva com o aumento do conteúdo de lignina residual da polpa. O tratamento com ozônio é mais seletivo para polpas kraft-O, mas para um mesmo tipo de polpa a seletividade de branqueamento com ozônio se eleva com o aumento de lignina residual. A eficiência do branqueamento com ozônio aumenta com o teor de lignina fenólica na polpa, entretanto a seletividade é negativamente afetada pela presença destas estruturas.This study aimed to evaluate the effect of residual lignin content and nature on the efficiency and selectivity of ozone bleaching of conventional (kraft and oxygen delignified (kraft-O pulps. Ozone bleaching efficiency was found to be enhanced by increasing pulp residual lignin content. Ozone treatment is more selective for kraft-O pulps, but for a given type of pulp (kraft or kraft-O, ozone bleaching selectivity increases with increasing pulp lignin content. Ozone bleaching efficiency increases with increasing pulp lignin phenolic hydroxyl content whereas selectivity is negatively affected by these structures.

  6. Protecting the 'Na Plachtě' natural monument from development. A case study on the importance of public participation in environmental protection

    Directory of Open Access Journals (Sweden)

    Vendula Záhumenská

    2014-11-01

    Full Text Available Na Plachtě is located at the south-eastern edge of Hradec Králové where over the past 20 years conflicts of interests between environmentalists and local developers have arisen concerning the development and commercial use of the site. This case study is concerned with the importance of public participation in  environmental issues and describes the specific opportunities for influencing environmental decision-making. The author refers to specific events which eventually resulted in the declaration of the Na Plachtě site as a “natural monument”; she also investigates opportunities for changing the landscape plan which would strengthen  protection against any construction on the site. Other possibilities for influencing decision-making about issues of concern to the general public and which have an impact on the work of regional representatives are also discussed.

  7. Analysis of the natural gas market in Fortaleza metropolitan region (Brazil); Analise do mercado de gas natural na regiao metropolitana de Fortaleza

    Energy Technology Data Exchange (ETDEWEB)

    Barroso, Carlos Andre M.; Rabelo, Clarice A.C.; Santana, Lana L.P.; Sucupira, Marcos L.L. [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil)

    2004-07-01

    Natural gas has become one of the most important energy sources, as we can observe in most countries' energy sector, where its presence is very significant. In Brazil, natural gas corresponds to 7,5% of all energy Also available, and the government has plans to increase this number to 12% until 2010. However, in order to reach this goal, it is important to understand how market works, evaluating all the aspects that have some influence on it. This paper goal is to analyze the natural gas market in Fortaleza metropolitan region, emphasizing the industrial sector, the biggest consumer in Ceara State. The main aspects are characterized here, like professionals qualification in the area, service quality, from equipment and maintenance suppliers until gas distributors, legal aspects, and other factors that are also relevant to a possible future expansion of different natural gas market segments (industry, residence, commerce and transport). (author)

  8. Naturally occurring mutations associated with resistance to HCV NS5B polymerase and NS3 protease inhibitors in treatment-naïve patients with chronic hepatitis C.

    Science.gov (United States)

    Costantino, Angela; Spada, Enea; Equestre, Michele; Bruni, Roberto; Tritarelli, Elena; Coppola, Nicola; Sagnelli, Caterina; Sagnelli, Evangelista; Ciccaglione, Anna Rita

    2015-11-14

    The detection of baseline resistance mutations to new direct-acting antivirals (DAAs) in HCV chronically infected treatment-naïve patients could be important for their management and outcome prevision. In this study, we investigated the presence of mutations, which have been previously reported to be associated with resistance to DAAs in HCV polymerase (NS5B) and HCV protease (NS3) regions, in sera of treatment-naïve patients. HCV RNA from 152 naïve patients (84 % Italian and 16 % immigrants from various countries) infected with different HCV genotypes (21,1a; 21, 1b; 2, 2a; 60, 2c; 22, 3a; 25, 4d and 1, 4k) was evaluated for sequence analysis. Amplification and sequencing of fragments in the NS5B (nt 8256-8640) and NS3 (nt 3420-3960) regions of HCV genome were carried out for 152 and 28 patients, respectively. The polymorphism C316N/H in NS5B region, associated with resistance to sofosbuvir, was detected in 9 of the 21 (43 %) analysed sequences from genotype 1b-infected patients. Naturally occurring mutations V36L, and M175L in the NS3 protease region were observed in 100 % of patients infected with subtype 2c and 4. A relevant proportion of treatment naïve genotype 1b infected patients evaluated in this study harboured N316 polymorphism and might poorly respond to sofosbuvir treatment. As sofosbuvir has been approved for treatment of HCV chronic infection in USA and Europe including Italy, pre-treatment testing for N316 polymorphism on genotype 1b naïve patients should be considered for this drug.

  9. Reference price of natural gas produced in Bacia dos Solimoes; Preco de referencia do gas natural produzido na Bacia do Solimoes

    Energy Technology Data Exchange (ETDEWEB)

    Valim, Leandro S.; Ferreira, Leticia P.; Correia, Irina S.; Guimaraes, Maria Jose de O.C.; Seidl, Peter R. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica; Bispo, Luiz Henrique de Oliveira [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica; Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Rio de Janeiro, RJ (Brazil)

    2012-07-01

    Oil and natural gas are exhaustible resources. Thus, exploitation of these energy sources can lead to shortages and even the absence for future generations. In this context, royalties are included as a way to financially compensate future generations through a monthly payment made by the explorer. In Brazil, the control of the royalties and their distribution is charge of the National Agency of Petroleum, Natural Gas and Biofuels (ANP). Its function is to establish reference prices used for the payment of royalties on oil and natural gas. In this study, three methods were used to calculate royalties, using data from Leste do Urucu field, located in Solimoes Basin. The first one is imposed by Resolution ANP No. 40/2009 that uses the calculation of the reference price of natural gas produced in Brazil. The second one is an alternative method of calculating royalties produced by Bispo, 2011, considering the different compositions of the gas produced and injected. And finally, the Resolution ANP RD No. 983/2011 that uses the calculation of the price of gas injected, considering this as the price of gas processed. When performing the calculation of royalties through the proposed methodologies by Bispo, 2011, and the ANP (Resolution No. 40/2009 and RD 983/2011), the results were similar to each other, and the methodology proposed by Resolution No. 40/2009 was the most different from the others. (author)

  10. Consumo de gás natural na indústria de revestimentos cerâmicos brasileira Consumption of natural gas in Brazilian ceramic tile industry

    Directory of Open Access Journals (Sweden)

    H. J. Alves

    2008-09-01

    Full Text Available O gás natural, atualmente, é a principal fonte de geração de energia térmica utilizada pelas indústrias de revestimentos cerâmicos no mundo e também é um dos itens que tem maior participação sobre o custo do produto acabado. Neste trabalho é apresentado um levantamento do consumo de gás natural realizado em uma indústria de via seca do pólo produtivo de Santa Gertrudes - SP, de modo que foi possível determinar o consumo específico de cada equipamento consumidor, bem como, identificar os "gargalos energéticos" do processo produtivo.The natural gas is the main source of thermic energy generation used by ceramic covering industries around the world and it is also one of the itens which has the biggest weight over the finished product. In this work, it is presented a survey of the consumption of natural gas done in a factory of the productive pole of Santa Gertrudes-SP, which processes its products through a dry way, so that it was possible to determine the specific consumption of each consumer equipment, and also identify the "energetic necks" presented by the same.

  11. Effects of synthetic and naturally occurring flavonoids on Na+, K+-ATPase: Aspects of the structure-activity relationship and action mechanism

    International Nuclear Information System (INIS)

    Hirano, T.; Oka, K.; Akiba, M.

    1989-01-01

    A comparative study was made of the effects of 15 synthetic and naturally occurring flavonoids on the hydrolytic activity of Na + , K + -adenosine triphosphatase (ATPase). Twelve of the flavonoids examined were mono-hydroxy or mono-methoxy derivatives. All inhibited Na + , K + -ATPase from dog kidney cortex when present at concentrations from 40-1000 μM. Flavones possessing cyclohexyl instead of the phenyl group were the most potent with IC 50 at 257-320 μM. Structure-activity relationships were observed among the following mono-substituted flavones as: (i) 2-cyclohexyl-benzopyran-4-one much-gt 2-phenyl-benzopyran-4-one; (ii) 2-cyclohexyl-7-hydroxybenzopyran-4-one > 2-cyclohexyl-6-hydroxy-benzopyran-4-one > 2-cyclohexyl-5-hydroxybenzopyran-4-one. Some flavonoids showing potent inhibitory activity were also examined for ouabain-displacement activity on human erythrocytes. Hardly and of the flavonoids were able to block [ 3 H] ouabain binding to erythrocytes. These results suggest that the mechanism by which flavonoid block Na + , K + -ATPase is not related to the cardiac glycoside-specific binding site(s) of this enzyme

  12. Distinction of [220] and [204] textures of Cu(In,Ga)Se{sub 2} film and their growth behaviors depending on substrate nature and Na incorporation

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Dae-Hyung, E-mail: dhcho@etri.re.kr [IT Components and Materials Industry Technology Research Department, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno, Yuseong-gu, Daejeon 305-700 (Korea, Republic of); Kim, Jeha [Department of Solar & Energy Engineering, Cheongju University, 298 Daeseongro, Sangdang-gu, Cheongju, Chungbuk 360-764 (Korea, Republic of); Chung, Yong-Duck [IT Components and Materials Industry Technology Research Department, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno, Yuseong-gu, Daejeon 305-700 (Korea, Republic of); Korea University of Science and Technology (UST), 217 Gajeongno, Yuseong-gu, Daejeon 305-350 (Korea, Republic of)

    2015-08-31

    For better understanding of the structural property of polycrystalline tetragonal Cu(In,Ga)Se{sub 2} (CIGS) thin films grown on soda-lime glass, it is necessary to characterize the [220]- and [204]-oriented textures clearly that are related to the different physical properties. However, the distinction between the [220]- and [204]-oriented textures is very difficult because of their nearly identical plane spacings and atomic arrangements. Using X-ray diffraction techniques of high resolution θ–2θ scanning and reciprocal space mapping, we distinguished the [220]- and [204]-oriented textures of CIGS films and observed that the behaviors of [220] and [204] textures independently depended on both substrate nature and Na presence. We report the Na- and substrate-related dependence of the physical properties of the CIGS film was attributed to the independent growth behaviors of the [220] and [204] textures in the CIGS. - Highlights: • We investigated [220]- and [204]-oriented textures of Cu(In,Ga)Se{sub 2} (CIGS) films. • X-ray diffraction methods distinguished two textures. • The growth behaviors were influenced by underlying substrate and Na. • The [220] and [204] textures in CIGS should be differentially observed.

  13. Effects of synthetic and naturally occurring flavonoids on Na sup + , K sup + -ATPase: Aspects of the structure-activity relationship and action mechanism

    Energy Technology Data Exchange (ETDEWEB)

    Hirano, T.; Oka, K.; Akiba, M. (Tokyo College of Pharmacy (Japan))

    1989-01-01

    A comparative study was made of the effects of 15 synthetic and naturally occurring flavonoids on the hydrolytic activity of Na{sup +}, K{sup +} -adenosine triphosphatase (ATPase). Twelve of the flavonoids examined were mono-hydroxy or mono-methoxy derivatives. All inhibited Na{sup +}, K{sup +} -ATPase from dog kidney cortex when present at concentrations from 40-1000 {mu}M. Flavones possessing cyclohexyl instead of the phenyl group were the most potent with IC{sub 50} at 257-320 {mu}M. Structure-activity relationships were observed among the following mono-substituted flavones as: (i) 2-cyclohexyl-benzopyran-4-one {much gt} 2-phenyl-benzopyran-4-one; (ii) 2-cyclohexyl-7-hydroxybenzopyran-4-one {gt} 2-cyclohexyl-6-hydroxy-benzopyran-4-one {gt} 2-cyclohexyl-5-hydroxybenzopyran-4-one. Some flavonoids showing potent inhibitory activity were also examined for ouabain-displacement activity on human erythrocytes. Hardly and of the flavonoids were able to block ({sup 3}H) ouabain binding to erythrocytes. These results suggest that the mechanism by which flavonoid block Na{sup +}, K{sup +} -ATPase is not related to the cardiac glycoside-specific binding site(s) of this enzyme.

  14. Removal of emulsified and dissolved traces of organic compounds from industrial wastewaters using nature and synthesized (Na A and Nam) zeolites

    International Nuclear Information System (INIS)

    Modirshahla, N.; Tabatabaii, S.

    2004-01-01

    The main object of this study was to compare the natural and synthetic (Na A and Nam) zeolites as absorbents in removing emulsified and dissolved traces of organic compounds, which appear in the wastewater of power plants, refinery and petrochemical complexes. The specific objections of the work was: a) to select the best species that have the highest amount of absorption; b) to measure the rate of absorption of traces organic compounds and emulsions on the natural and synthesized zeolites; c) to establish the absorption isotherms for the organics and emulsions with selected samples; d) to select readily available regenerants, and e ) to examine the ph dependence of the process and to establish a simple and practical method to detect and to measure the pollution after the treatment process. The BOD and COD of the treated and feed waters were compared

  15. The Employment of spatial autoregressive models in predicting demand for natural gas; O Emprego de modelos auto-regressivos espaciais na previsao de demanda para gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Jorge Henrique de [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil); Silva, Alexandre Pinto Alves da [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil). Programa de Engenharia Eletrica

    2010-07-01

    Develop the natural gas network is critical success factor for the distribution company. It is a decision that employs the demand given location 'x' and a future time 't' so that the net allows the best conditions for the return of the capital. In this segment, typical network industry, the spatial infra-structure vision associated to the market allows better evaluation of the business because to mitigate costs and risks. In fact, economic models little developed in order to assess the question of the location, due to its little employment by economists. The objective of this article is to analyze the application of spatial perspective in natural gas demand forecasting and to identify the models that can be employed observing issues of dependency and spatial heterogeneity; as well as the capacity of mapping of variables associated with the problem. (author)

  16. The utilization of natural gas in the electricity production through fuel cell; A utilizacao do gas natural na geracao distribuida atraves de celulas combustiveis

    Energy Technology Data Exchange (ETDEWEB)

    Bernardi Junior, Paulo

    2004-07-01

    In function of the necessity of electric energy as input of vital importance for the development of the country, this work aims at to offer plus an energy alternative for Brazil. The exploitation of the natural gas reserves recently discovered can be made through modern methods that give as priority the distributed generation and the low ambient impact. All these aspects can be gotten with the use of fuel cell, working with the remodelled natural gas. Increased to the factor of a low ambient impact in the proper generation, the project suggests that the generating source can be located next the consumer, diminishing still more the problems generated for transmission lines, fuel transport, etc. The fuel cell has received a great attention in the international community and some models, some already in commercial period of training, they have shown excellent possibilities of capsize to be one of the future technologies in the generation of electric energy with low ambient impact. (author)

  17. Importance of evaluation of uncertainties on the measurement of natural gas and petroleum volumes; Importancia da avaliacao das incertezas na medicao dos volumes de petroleo e gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Silva Filho, Jose Alberto Pinheiro da; Oliveira, Thiago Barra Vidal de; Mata, Josaphat Dias da [PETROBRAS, Rio de Janeiro, RJ (Brazil)], Emails: jose.pinheiro@petrobras.com.br, thiagovidal@petrobras.com.br, josaphat@petrobras.com.br; Val, Luiz Gustavo do [Instituto de Qualidade e Metrologia (IQM), Rio de Janeiro, RJ (Brazil)], E-mail: gdoval.iqm@petrobras.com.br

    2009-07-01

    The measurement is considered as the 'cash register' of the enterprises, increasing the accuracy and the exigence at each step when come close to the delivery points, where the 0.1 % of differences are discussed. The work presents the approach used in the evaluation of measurement uncertainties in the volumes obtained of petroleum and natural gas at the processes of production in Brazil, and in the international level as well.

  18. The importance of flexibility in supply and demand in the natural gas market - The Brazilian case; A importancia da flexibilidade na oferta e na demanda de gas natural - o caso do mercado brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Jose Ricardo Uchoa Cavalcanti

    2008-05-15

    The objective of this dissertation is to identify and discuss the main tools in implementing flexibility in supply and demand in the natural gas market, as well as highlight those which are the most appropriate for the Brazilian market. Flexibility, in this context, means the ability to guarantee a balance of supply versus demand without deficits, considering, mainly, the seasonal variations (winter-summer). From there, the study analyzes these flexibility tools in detail. Next, it discusses which of these flexibility tools are currently being used in more mature foreign markets and which tools could be feasibly applied to the Brazilian market. This dissertation also addresses how the natural gas thermoelectric market in Brazil shows a wide range of seasonality due to this segment's nature of complementing the Brazilian hydroelectric complex. This occurs because the capacity to generate hydroelectricity depends on rainfall for supplying reservoirs. Because of this interdependence, it examines how each the natural gas industry and the power industry operate, and their convergence. The flexibility tools which are already implemented here in Brazil are then presented. Finally, additional relevant new concepts and information are discussed to support the conclusions and final comments about the flexibility tools evolution and new applications. (author)

  19. The importance of flexibility in supply and demand in the natural gas market - The Brazilian case; A importancia da flexibilidade na oferta e na demanda de gas natural - o caso do mercado brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Jose Ricardo Uchoa Cavalcanti

    2008-05-15

    The objective of this dissertation is to identify and discuss the main tools in implementing flexibility in supply and demand in the natural gas market, as well as highlight those which are the most appropriate for the Brazilian market. Flexibility, in this context, means the ability to guarantee a balance of supply versus demand without deficits, considering, mainly, the seasonal variations (winter-summer). From there, the study analyzes these flexibility tools in detail. Next, it discusses which of these flexibility tools are currently being used in more mature foreign markets and which tools could be feasibly applied to the Brazilian market. This dissertation also addresses how the natural gas thermoelectric market in Brazil shows a wide range of seasonality due to this segment's nature of complementing the Brazilian hydroelectric complex. This occurs because the capacity to generate hydroelectricity depends on rainfall for supplying reservoirs. Because of this interdependence, it examines how each the natural gas industry and the power industry operate, and their convergence. The flexibility tools which are already implemented here in Brazil are then presented. Finally, additional relevant new concepts and information are discussed to support the conclusions and final comments about the flexibility tools evolution and new applications. (author)

  20. Model for negotiation on contingency plans for distribution of natural gas; Modelo de negociacao para planos de contingencia energetica na area de gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Sobral, Marcos Felipe Falcao; Morais, Danielle Costa [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

    2008-07-01

    The high consumption of Natural Gas (NG), the environmental and economic turbulences that occurred in recent years raises questions about the supply of the product in critical situations. Characteristic factors of natural gas, like the high cost of storage, show the need for the establishment of contingency plans that define what procedures should be adopted in the distribution of Natural Gas or redistribute among consumers in times of restriction of supply, substantial increase on demand or reduction in the ability of supply. These plans aim to define in advance the actions that will be adopted, providing business and consumer segments clear rules indicate the time to search for alternative sources in case of crisis. The current models can not yet address the problem of negotiation for the division of the product following the concepts proposed by the science of trading, making things like proportionality and envy-free are not observed. The aim of this study is to propose a model for distribution of quotas for supply of NG between different consumer segments. The proposed algorithm combines the procedures of Knaster, Steinhaus and Divide the Dollar, seeking an allocation that minimize the feeling of jealousy and provide an equitable distribution. (author)

  1. natural

    Directory of Open Access Journals (Sweden)

    Elías Gómez Macías

    2006-01-01

    Full Text Available Partiendo de óxido de magnesio comercial se preparó una suspensión acuosa, la cual se secó y calcinó para conferirle estabilidad térmica. El material, tanto fresco como usado, se caracterizó mediante DRX, área superficial BET y SEM-EPMA. El catalizador mostró una matriz de MgO tipo periclasa con CaO en la superficie. Las pruebas de actividad catalítica se efectuaron en lecho fijo empacado con partículas obtenidas mediante prensado, trituración y clasificación del material. El flujo de reactivos consistió en mezclas gas natural-aire por debajo del límite inferior de inflamabilidad. Para diferentes flujos y temperaturas de entrada de la mezcla reactiva, se midieron las concentraciones de CH4, CO2 y CO en los gases de combustión con un analizador de gases tipo infrarrojo no dispersivo (NDIR. Para alcanzar conversión total de metano se requirió aumentar la temperatura de entrada al lecho a medida que se incrementó el flujo de gases reaccionantes. Los resultados obtenidos permiten desarrollar un sistema de combustión catalítica de bajo costo con un material térmicamente estable, que promueva la alta eficiencia en la combustión de gas natural y elimine los problemas de estabilidad, seguridad y de impacto ambiental negativo inherentes a los procesos de combustión térmica convencional.

  2. City gates maintenance - TBG experience; Experiencia da TBG na manutencao de estacoes de entrega de gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, Adir de Brito; Tavares, Cipriano Homem; Pinto, Jose Eduardo Christovao [Transportadora Brasileira Gasoduto Bolivia-Brasil, S.A., Rio de Janeiro, RJ (Brazil)

    2005-07-01

    Owner and sole operator in Brasilian territory of the Bolivia-Brazil Gas Pipeline (GASBOL), the largest of its kind in South America, TBG started operations on July 1 st, 1999. Since then, it has ensured transportation of Bolivian natural gas into Brazil swiftly and safely. This paper relates the TBG experiences on Natural Gas City Gates maintenance and its components like filtering, heating, pressure reducing redundant valves, turbine meters, flow computers, solar panel power supply, satellite monitoring system, acquired by 6 years of operation of Brazil Bolivia Gas Pipe Line. It describes the definitions of maintenance plans using RCM - Reliability-centered Maintenance concepts and the most important learning experiences. (author)

  3. Recent studies on radiation damage formation in synthetic NaCl and natural rock salt for radioactive waste disposal applications

    International Nuclear Information System (INIS)

    Swyler, K.J.; Klaffky, R.W.; Levy, P.W.

    1980-01-01

    Radiation damage formation in natural rock salt is described as a function of irradiation temperature and plastic deformation. F-center formation decreases with increasing temperature while significant colloidal sodium formation occurs over a restricted temperature range around 150 0 C. Plastic deformation increases colloid formation; it is estimated that colloid concentrations may be increased by a factor of 3 if the rock salt near radioactive waste disposal canisters is heavily deformed. Optical bandshape analysis indicates systematic differences between the colloids formed in synthetic and natural rock salts

  4. Cultivo de beterraba em ambientes protegido e natural na época de verão

    OpenAIRE

    João A. Tullio; Rosana F. Otto; Adriane Boer; Silvana Ohse

    2013-01-01

    Objetivou-se neste trabalho avaliar as respostas produtivas de beterraba cultivada em ambiente natural e sob túnel com malha de sombreamento durante a época de verão. O delineamento experimental foi blocos ao acaso com quatro repetições e os tratamentos arranjados em parcela sub-subdividida tendo, como fator primário, os ambientes de cultivo (protegido e natural), como fator secundário, as cultivares (Itapuã 202 e Tall Top Early Wonder) além das épocas de colheita (13, 26, 39, 52 e 65 dias ap...

  5. Analyses of the use of natural gas in solar power plants (CSP) hybridization in the Sao Francisco Basin (BA); Analise do uso de gas natural na hibridizacao de plantas termosolares (CSP) na Bacia do Sao Francisco (BA)

    Energy Technology Data Exchange (ETDEWEB)

    Malagueta, Diego Cunha; Penafiel, Rafael Andres Soria; Szklo, Alexandre Salem; Dutra, Ricardo M.; Schaeffer, Roberto [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil)

    2012-07-01

    This study assessed the feasibility of Concentrated Solar Power plants (CSP) in Northeast, Brazil. It focused on parabolic trough solar power plants, which is the most mature CSP technology; and evaluated plants rated at 100 MWe, dry cooling systems (due to the low water availability in Northeast), and with and without hybridization based on natural gas (degree of hybridization varying from 25 to 75%). Hence, the capacity factor of the simulated plants hovered between 23 and 98%, according to the degree of hybridization and the choice of the thermodynamic cycle of the natural gas fueled thermal system: Rankine or combined cycle. The CSP plants were simulated at Bom Jesus da Lapa, in the semi-arid region of Bahia. Given the prospects for natural gas resources in the Sao Francisco Basin, different scenarios for the gas prices were tested. Moreover, two scenarios were tested for the cost of the CSP plants, one based on the current financial environment and the other based on incentive policies, such as fiscal incentives and loans. Findings show that while simple plants levelized costs (LCOE) hovered around 520 R$/MWh, for hybrid plants LCOE may reach 140 to 190 R$/MWh. Therefore, this study proposed incentive policies to promote the increasing investment in hybrid CSP plants. (author)

  6. Brazil's insertion in the international LNG (Liquefied Natural Gas) route; A insercao do Brasil na rota internacional de GNL (Gas Natural Liquefeito)

    Energy Technology Data Exchange (ETDEWEB)

    Kueng, Stephan de Carvalho; Bastos, Filipe Sant' Ana [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil)

    2008-07-01

    In the late 1990's, PETROBRAS began considering diversifying its energy sources. This included the possibility of importing LNG (Liquefied Natural Gas), making it one additional source for gas supply in Brazil. There is a belief that the imported LNG is the cheapest, quickest and most efficient option in terms of infrastructure compared to other transportation, such as pipelines. This will permit an increase in gas supply, given the growing demand for this energy source in the domestic market. The current international LNG trading market is adjusting itself to the world integration, where short-term (spot) agreements prevail. These agreements have many advantages, such as: lowering fixed trading costs; the possibility to diversify suppliers; minimizing gas supply risk; and facilitating import market supply adjustment. In Brazil, the main objective to import LNG is to supply natural gas (NG) to thermal plants, supplementing the hydroelectric - gas integration of the electric system. For the accomplishment of this project, it is forecasted the construction of LNG offloading terminals, together with the construction of gas distribution networks. Therefore, LNG transportation will guarantee security in supply, permit the diversification of the NG supply source and enable the increased use of NG in the Brazilian energy grid. (author)

  7. Natural gas perspectives of diffusion on the brazilian structural ceramics industry; Perspectivas de difusao do gas natural na industria brasileira de ceramica vermelha

    Energy Technology Data Exchange (ETDEWEB)

    Schwob, Marcelo Rousseau Valenca

    2007-03-15

    This study evaluates the perspectives of the natural gas (NG) used by the Brazilian structural ceramics industry (BSCI), according to technological, economic and environmental aspects. It identifies the advantages of using NG, as well as the barriers faced by this energy source. Considering the amount of NG required by the thermal demand of the BSCI processes and the average energy specific use of the furnaces in operation in Brazil, the total consumption of NG will be nearly 12.06 Mm{sup 3/}day. However, the existence of few technical and economical adequate conversion conditions for ceramics furnaces (4% of continuous furnaces) limits the previous potential to only 0.67 Mm{sup 3/}day. In addition, considering the geographic intersection of the ceramics production clusters with the natural gas distribution grid of the Brazilian states, the estimated potential is lowered to 0.28 Mm{sup 3/}day. Yet, the perspective of the NG diffusion in the BSCI in the medium to the long term is more positive, owning to the increasing implementation of large scale production furnaces and cogeneration systems. Also worthwhile to this positive perspective are: the improving demand for certified structural ceramic products, with more quality and value added, and the expanding investment in low income classes dwelling programs. (author)

  8. The spatio-temporal perspective used in the projection of the demand for natural gas; A perspectiva espaco-temporal empregada na projecao de demanda de gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Jorge Henrique de [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil). Area de Gas e Energia; Silva, Alexandre Pinto Alves da [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil)

    2010-07-01

    The increase of the demand for energy resulted in a diversification of world-wide energy matrix. Specifically in the Brazilian scene, that historically prioritized the exploration of the oil and hydro electric power generation, it saw to grow the slice of participation of the natural gas in energy matrix, seen its versatility and low cost and environment impact. In the energy segment, the activity of demand forecast it has developed mainly using the boarding of time series, especially for the use of econometrics assumptions. However, in the econometric context, has been ignored the effect related with the spatial autocorrelation and the spatial heterogeneity, and not to consider these questions violate the premises of Gauss-Markov applied in the regression modeling. This article analyzes the influence and the use of the perspective time-space in the development of models of forecast of Natural Gas demand, with attention in the characteristics of the relationships between events in the time and the space. (author)

  9. Possibilities of the natural gas supply in the Republic of Croatia; Osvrt na mogucnosti opskrbe Republike Hrvatske prirodnim plinom

    Energy Technology Data Exchange (ETDEWEB)

    Mavrovic, S; Matic, D [Energetski institut Hrvoje Pozar, Zagreb (Croatia)

    1997-12-31

    Europe and Croatia meet 70% of their total natural gas demand from indigenous production and import other 30% (20% from the Russian Federation and 10% from Algeria). Croatia imports gas only from Russia. Forecasts and analysis of energy sector development point out that natural gas consumption will be doubled till 2010 when it will reach approximately 555-651 bcm. Natural gas consumption is expected to rise significantly in Croatia. Estimations of required import made by INA and PROHES - preliminary results, are similar. It has been expected that future import in 2010 will be between 2 and 3 bcm depending on considered scenario. Due to expectations of rising gas demand, Europe is turning on to new projects aiming to better connections by pipelines and LNG chains. New projects are considering constructions of new Russian transmission lines, additional lines from North Sea, increasing capacity of lines from Algeria, UK interconnection with Continent, and new pipelines and LNG routes from Middle East and Central Asia. Involvement in some the above mentioned projects is of importance for Croatia because it enables additional natural gas quantities and diversification of sources. (author). 9 tabs., 3 figs.

  10. Suggestions to leak prevention in Fortaleza's natural gas piping system; Sugestoes para a prevencao de vazamentos de gas natural canalizado na regiao metropolitana de Fortaleza

    Energy Technology Data Exchange (ETDEWEB)

    Teles, Marcus de Barros [Agencia Reguladora de Servicos Publicos Delegados do Estado do Ceara (ARCE), Fortaleza, CE (Brazil)

    2004-07-01

    Leaks are the bigger problem in health, safety and environmental when the subject is gas distribution piping systems. Specially in high density human regions, like in the majority districts of Fortaleza, safety have to be the higher priority to the gas company responsible for the gas distribution piping systems. Leaks are able to cause accidents or incidents, depending on the circumstances which they happen. In order to be control the situation and overcome the luck factor, leaks must be previously avoided by the application of some security requirements. This paper present some suggestions to natural gas leak prevention in the Fortaleza's metropolitan region pipeline systems. First, the piping systems are analysed, observing the risk regions. Then, safety actions and basic requirements to avoid pipe corrosion are presented in order to improve safety in the gas distribution piping systems of Fortaleza's metropolitan region. (author)

  11. Mudanças climáticas, riscos e adaptação na megacidade de São Paulo, Brasil

    Directory of Open Access Journals (Sweden)

    Gabriela Marques Di Giulio

    2017-09-01

    Full Text Available O artigo discute resultados de uma pesquisa sobre a experiência em curso da megacidade de São Paulo relacionada a questões climáticas. Dialogando com a literatura e tendo como base estudo realizado entre 2014 e 2015, reflete sobre o papel do poder local no processo de buscar sinergias entre adaptação, mitigação e desenvolvimento por meio da experimentação. Os autores discutem ações implementadas em São Paulo com potencial para responder aos desafios climáticos, com foco nas intervenções que não estão diretamente associadas ao discurso climático. Exemplos dessas intervenções são as propostas do Plano Diretor e ações de mobilidade urbana adotadas na gestão municipal (2013-2016. Esses projetos e a adoção de uma agenda socioambiental podem se constituir como respostas às mudanças climáticas, promovendo sinergias entre adaptação e mitigação. Os autores concluem o artigo sinalizando desafios para a adaptação na capital paulista, considerando suas especificidades e complexidades nos planos econômico/político/social.

  12. Produtos artesanais de identidade territorial: o desenvolvimento do patrimônio natural e cultural na comunidade Mocambeiro - Brasil

    Directory of Open Access Journals (Sweden)

    Rita de Castro Engler

    2017-12-01

    Full Text Available Este trabalho apresenta parte dos resultados da pesquisa extensionista realizada na comunidade Mocambeiro, Matozinhos, Minas Gerais, entre 2015 e 2016, cidade em que o CEDTec, Centro de Estudos em Design e Tecnologia, promoveu oficinas de produtos artesanais de identidade territorial, inspirados nas figurações rupestres das grutas, abrigos e cavernas pré-históricas, ali existentes. A proposta busca valorizar o trabalho de produção artesanal da população local, principalmente as donas de casa, buscando ligação com a arte e o design. Realiza-se a contextualização dos símbolos do patrimônio arqueológico da região cárstica da APA (Área de Proteção Ambiental de Lagoa Santa. A memória cultural, história e patrimônio arqueológico são abordados, através das oficinas de educação e arte, em um ambiente de troca, aprendizado e aperfeiçoamento para novas atividades, que estimulem a geração de renda e o empreendedorismo. Os procedimentos para a execução do projeto se dividem em três etapas: estudos para elaboração de oficinas e desenvolvimento de produtos, utilizando os materiais que possam ser encontrados na região de Matozinhos; desenvolvimento de oficinas para a comunidade de Mocambeiro e avaliação das atividades; desenvolvimento de produtos, a partir dos resultados, destinados a servirem se suporte para a continuidade do projeto, valendo-se da identidade local. Foi verificada a possibilidade de produção criativa e novas áreas de atuação do design nas comunidades artesãs, práticas indispensáveis à construção de valorização do artesanato local, atual e do futuro.

  13. COMUNICAÇÃO MÃE-FILHO DURANTE AMAMENTAÇÃO NATURAL E ARTIFICIAL NA ERA AIDS

    Directory of Open Access Journals (Sweden)

    Simone Gonçalves Vasconcelos

    2010-01-01

    Full Text Available La lactancia natural de la madre infectada por el VIH al hijo es factor de riesgo para la transmisión del virus, por lo tanto se recomienda excluir la lactancia natural. El hecho de no darle el pecho puede dificultar la comunicación del binomio madre-hijo. Fue desarrollado un estudio comparativo a la luz de los factores proxémicos entre madre e hijo durante la alimentación artificial y lactancia materna entre madres seropositivas y seronegativas para el VIH. En alojamiento conjunto fueron analizadas 84 interacciones entre cuatro binomios. La distancia íntima prevalece en el 100% de las interacciones, así como la postura sentada. Los bebés de las madres seropositivas permanecieron la mayor parte del tiempo activos en comparación a los verticalmente expuestos. Probablemente, la calidad de las interacciones a lo largo del tiempo y la responsividad materna al bebé irán determinar los efectos de la falta de lactancia natural en el desarrollo del apego entre madre e hijo.

  14. Model for the development of competition in the natural gas industry in Brazil; Modelo para o desenvolvimento da competicao na industria de gas natural no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Sant Ana, Paulo Henrique de Mello; Jannuzzi, Gilberto de Martino; Bajay, Sergio Valdir [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico

    2008-07-01

    In the last 20 years, several countries have undergone to structural reforms in the gas sector, to increase the economic efficiency through the introduction of competition. This work proposes a framework to stimulate the development of competition in the gas sector in Brazil, based on a market forecast, the international experience and the characteristics of the market, structure and regulation in Brazil; the impacts of this framework in the market are also analyzed. According to the market forecasting, there will be a likely surplus of natural gas in Brazil. This surplus, allied with retail trading competition to be introduced in the states of Sao Paulo and Rio de Janeiro, together with a sound regulation that promote open access and transparency, moreover a regulated transmission, distribution and storage, may help to stimulate competition. If the framework is implemented, it would probably help the creation a wholesale and a retail gas market; stimulating risk management tools, i.e. derivative instruments; promoting a shift from long-term to short-term contracts between LDC's and shippers; creating a spot and future markets; and promoting a move towards spot and futures gas price indexing in mid- and long-term supply contracts. Competition would probably bring end-user prices down, as it happened in other countries that faced deregulation process. (author)

  15. Model for the development of competition in the natural gas industry in Brazil; Modelo para o desenvolvimento da competicao na industria de gas natural no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Sant Ana, Paulo Henrique de Mello; Jannuzzi, Gilberto de Martino; Bajay, Sergio Valdir [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico

    2008-07-01

    In the last 20 years, several countries have undergone to structural reforms in the gas sector, to increase the economic efficiency through the introduction of competition. This work proposes a framework to stimulate the development of competition in the gas sector in Brazil, based on a market forecast, the international experience and the characteristics of the market, structure and regulation in Brazil; the impacts of this framework in the market are also analyzed. According to the market forecasting, there will be a likely surplus of natural gas in Brazil. This surplus, allied with retail trading competition to be introduced in the states of Sao Paulo and Rio de Janeiro, together with a sound regulation that promote open access and transparency, moreover a regulated transmission, distribution and storage, may help to stimulate competition. If the framework is implemented, it would probably help the creation a wholesale and a retail gas market; stimulating risk management tools, i.e. derivative instruments; promoting a shift from long-term to short-term contracts between LDC's and shippers; creating a spot and future markets; and promoting a move towards spot and futures gas price indexing in mid- and long-term supply contracts. Competition would probably bring end-user prices down, as it happened in other countries that faced deregulation process. (author)

  16. Radiation induced F-center and colloid formation in synthetic NaCl and natural rock salt: applications to radioactive waste repositories

    International Nuclear Information System (INIS)

    Levy, P.W.; Loman, J.M.; Kierstead, J.A.

    1983-01-01

    Radiation damage, particularly Na metal colloid formation, has been studied in synthetic NaCl and natural rock salt using unique equipment for making optical absorption, luminescence and other measurements during irradiation with 1 to 3 MeV electrons. Previous studies have established the F-center and colloid growth phenomenology. At temperatures where colloids form most rapidly, 100 to 250 C, F-centers appear when the irradiation is initiated and increase at a decreasing rate to a plateau, reached at doses of 10 6 to 10 7 rad. Concomitant colloid growth is described by classical nucleation and growth curves with the transition to rapid growth occurring at 10 6 to 10 7 rad. The colloid growth rate is low at 100 C, increases markedly to a maximum at 150 to 175 C and decreases to a negligible rate at 225 C. At 1.2x10 8 rad/h the induction period is >10 4 sec at 100 C, 10 4 sec at 275 C. The colloid growth in salt from 14 localities is well described by C(dose)/sup n/ relations. Data on WIPP site salt (Los Medanos, NM, USA) has been used to estimate roughly the colloid expected in radioactive waste repositories. Doses of 1 to 2x10 10 rad, which will accumulate in salt adjacent to lightly shielded high level canisters in 200 to 500 years, will convert between 1 and 100% of the salt to Na colloids (and Cl) if back reactions or other limiting reactions do not occur. Each high level lightly shielded canister may ultimately be surrounded by 200 to 300 kg of colloid sodium. Low level or heavily shielded canisters may produce as little as 1 kg sodium

  17. EFEITO DO TEOR DE EXTRATIVOS NA RESISTÊNCIA NATURAL DE CINCO MADEIRAS AO ATAQUE DE CUPINS XILÓFAGOS

    Directory of Open Access Journals (Sweden)

    Juarez Benigno Paes

    2016-01-01

    Full Text Available When man stopped being nomadic, he had to adapt to new conditions, and started employing wood for energy, hunting and defense instruments and miscellaneous constructive elements. Since then, in the light of usages and rapid growth, the importance of wood has been increasing, primarily by their exploitation assaults less the environment when compared to other non-renewable materials. Although there are several researches about Eucalyptus and Pinus, but studies with other species are incipient mainly about the extractive effects on the wood natural resistance. Thus, this research aimed to assess the influence of extractive contents with the natural resistance of Acacia mangium, Casuarina sp. Eucalyptus cloeziana, Corymbia torelliana and Tectona grandis woods to Nasutitermes corniger xylophagous termite, species of frequent occurrence in several regions in Brazil. From each species, test samples were taken, with dimensions of 2.00 x 10.16 x 0.64 (radial x longitudinal x tangential in four positions in the medulla-sapwood direction (internal core, intermediate core, outer core and sapwood. The woods were exposed to the action of termites for 45 days in a food preference assay. The samples not selected for the test with termites were turned into sawdust and the extractive contents were obtained by using the fraction which passed through the sieve 40 and was retained in 60 mesh. The natural resistance has not been linked to extractive levels present in the wood. The resistance of wood varied in medulla-sapwood direction, with default variable for each species. The more resistant timbers were Tectona grandis and Corymbia torelliana and the most deteriorated was Acacia mangium.

  18. GESTÃO AMBIENTAL DE ATIVIDADES RURAIS NO POLO DE AGRICULTURA NATURAL DE IPEÚNA, SP

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Demattê Filho

    2014-12-01

    verificadas, como segue: Ecologia da paisagem (0,87, Qualidade da atmosfera (0,78, Qualidade da água (0,91, Qualidade do solo (0,85, Valores socioculturais (0,83, Valores econômicos (0,88 e Gestão e administração (1,00. Todos os indicadores apresentaram índices de desempenho superiores ao nível de conformidade preconizado no sistema de indicadores APOIA-NovoRural. Com estas características de desempenho ambiental, o Polo de Agricultura Natural de Ipeúna representa um empreendimento rural com excelente índice integrado de sustentabilidade (0,87, justificando sua posição de destaque como unidade de experimentação e pesquisa, transferência de tecnologia, e modelo de produção agrícola natural e orgânica.

  19. Na-smectite s in the Cala de Tomate bentonite deposit (Spain): a natural analogue of the salinity effect on the bentonite barrier of a rad waste disposal

    Energy Technology Data Exchange (ETDEWEB)

    Perez del Villar, L.; Pelayo, M.; Fernandez, A.M.; Cozar, J.S. [CIEMAT - Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT/DIRE/CEAGP), Madrid (Spain); Delgado, A.; Reyes, E. [Ciencias de la Tierra y Quimica Ambiental Estacion Experimental del Zaidin Dpt., Granada (Spain); Fernandez-Soler, J.M. [Granada Univ., Dpt. de Mineralogia y Petrologia (Spain); Tsige, M. [Facultad de Ciencias Geologicas, Dpt. de Geodinamica, Madrid (Spain)

    2005-07-01

    Within the framework of the ENRESA programme for the assessment of the long-term behaviour of the bentonite-engineered barrier for a deep radwaste geological repository, analogue studies on several bentonite deposits are conducted at CIEMAT. Among these analogue studies, the thermal effect induced by volcanic intrusions on bentonite deposits is highlighted. In the Cabo de Gata volcanic region, there are several analogue scenarios where these studies have been performed, such as the Cala de Tomate bentonite deposit that was intruded by a pyroxene andesite volcanic dome. However, geological, mineralogical, physicochemical, geochemical and stable isotopic data obtained from the smectites do not allow to establish any analogy with the thermal effect expected on the bentonite-engineered barrier of a deep geological repository after burial. Thus, the bentonitisation processes took place after the intrusion of the dome, as a result of meteoric diagenesis intensively developed on faulting zone affecting the parent pyroclastic acid tuffs. This faulting process occurred after the dome intrusion. However, the physicochemical characteristics of these smectites, specially the exchangeable cations, allow to consider this bentonite deposit as a natural analogue of the saline effect on the clayey barrier. This analogy has been established because Na-smectites are present in this deposit and, up to our present knowledge, it is the first time that these smectites occur naturally in the Cabo de Gata-La Serrata de Nijar volcanic region. As a consequence, the main objectives of this work are: i) to characterise these smectites; ii) to establish their genesis and processes affecting them after their formation and iii) to identify the effects on the bentonite-engineered barrier should it were affected by a Na-rich saline waterfront. (authors)

  20. O Impacto de Brises na Ventilação Natural: Avaliação Integrada em uma Enfermaria em Florianópolis (SC

    Directory of Open Access Journals (Sweden)

    Bianca Milani de Quadros

    2018-02-01

    Full Text Available Resumo A principal função dos brises é o controle do ganho de calor pelas janelas. No entanto, estes elementos também podem influenciar no desempenho da ventilação natural. Em edifícios hospitalares, a ventilação natural pode reduzir o consumo de energia, proporcionar conforto térmico e controlar a infecção hospitalar por meio da renovação do ar nos ambientes onde não há obrigatoriedade do uso de sistemas de ar condicionado. Este artigo analisa o impacto de brises no desempenho da ventilação natural em uma enfermaria em Florianópolis (SC. Para uma análise detalhada, o estudo integrou simulações computacionais com modelos de rede e CFD. Foram simulados dois casos: caso 1 que reproduz o ambiente existente sem brises e o caso 2 que apresenta o mesmo ambiente com brises em todas as janelas. Os resultados demonstram que a aplicação de brises modifica o comportamento da ventilação natural com o aumento da velocidade do ar de entrada e, consequentemente, com a elevação da velocidade média do ar interno. Conclui-se que os brises apresentam não apenas a usual finalidade de redução do ganho de calor, mas também podem auxiliar na melhoria do desempenho da ventilação natural. Palavras-Chave: Conforto Ambiental; Ventilação; Brises; EnergyPlus; CFD. Abstract The main purpose of shading devices is controling windows heat gain. However, these elements can have an influence on natural ventilation control according its geometry and wind direction. In hospitals, natural ventilation can be used to reduce the energy consumption, to provide thermal comfort and to control hospital-acquired infections through air renewal for all rooms where the HVAC systems is not mandatory. This paper analyzes the impact of shading devices on the performance of natural ventilation in an infirmary room in Florianopolis, Brazil. For a detailed analysis of natural ventilation, this study combined computational simulation with Airflow Network model and

  1. Natural Polymorphisms Conferring Resistance to HCV Protease and Polymerase Inhibitors in Treatment-Naïve HIV/HCV Co-Infected Patients in China.

    Directory of Open Access Journals (Sweden)

    Kali Zhou

    Full Text Available The advent of direct-acting agents (DAAs has improved treatment of HCV in HIV co-infection, but may be limited by primary drug resistance. This study reports the prevalence of natural polymorphisms conferring resistance to NS3/4A protease inhibitors and NS5B polymerase inhibitors in treatment-naïve HIV/HCV co-infected individuals in China.Population based NS3/4A sequencing was completed for 778 treatment-naïve HIV/HCV co-infected patients from twelve provinces. NS3 sequences were amplified by nested PCR using in-house primers for genotypes 1-6. NS5B sequencing was completed for genotyping in 350 sequences. Resistance-associated variants (RAVs were identified in positions associated with HCV resistance.Overall, 72.8% (566/778 of all HCV sequences had at least one RAV associated with HCV NS3/4A protease inhibitor resistance. Variants were found in 3.6% (7/193 of genotype 1, 100% (23/23 of genotype 2, 100% (237/237 of genotype 3 and 92% (299/325 of genotype 6 sequences. The Q80K variant was present in 98.4% of genotype 6a sequences. High-level RAVs were rare, occurring in only 0.8% of patients. 93% (64/69 patients with genotype 1b also carried the C316N variant associated with NS5B low-level resistance.The low frequency of high-level RAVs associated with primary HCV DAA resistance among all genotypes in HIV/HCV co-infected patients is encouraging. Further phenotypic studies and clinical research are needed.

  2. Compressed natural gas as a vehicle to promote development of consumer market in Campina Grande - PB (Brazil); O gas natural comprimido como fomentador do desenvolvimento do mercado consumidor de gas natural na regiao de Campina Grande - PB

    Energy Technology Data Exchange (ETDEWEB)

    Bonfim, Marcelo dos Santos; Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-Graduacao em Energia (PIPGE)

    2004-07-01

    Investments required for natural gas distribution networks are high. The use of compressed natural gas (CNG) is seen as a way to prepare and develop consuming markets to receive those networks. This paper outlines the socio-economic context and the reasons that motivated the creation of a CNG project in Campina Grande, in the state of Paraiba. Technical aspects of project implementation are described, including difficulties encountered and courses of action undertaken as a result. Other aspects considered include the social and economic impact and local consumer's expectations with the arrival of new fuel. The study also considers factors relevant to the project such as the distance from the pressure measurement and regulation station, transported volumes, technology used, infrastructure and road conditions. (author)

  3. Impacto de um desastre natural sobre o habitat e a ocorrência de Lontra longicaudis (Mustelidae, Carnivora na Serra da Prata, Paraná, Brasil

    Directory of Open Access Journals (Sweden)

    Marcos A. Navarro

    2017-10-01

    Full Text Available RESUMO Estudos com impacto de desastres naturais sobre a fauna são raros na literatura científica. Considerando Lontra longicaudis (Olfers, 1818, informações publicadas não foram encontradas. O presente estudo buscou determinar se os deslizamentos de terra ocorridos em março de 2011 em parte das montanhas da Serra da Prata (Paraná, Brasil afetaram de alguma forma a ocorrência da Lontra Neotropical no local impactado. Com esse propósito, a área estudada compreendeu um rio afetado (Rio Santa Cruz - RSC da face leste dessa serra que foi comparado com outro não afetado (Rio das Pombas - RP, localizado na mesma face da serra e com características semelhantes às originais do RSC. A área de estudo está situada no Parque Nacional de Saint-Hilaire/Lange (PNSHL. Foram realizadas sete campanhas a partir do limite altitudinal do PNSHL (60 m s.n.m para montante entre agosto de 2012 e julho de 2013. As campanhas consistiram de busca ativa por vestígios (fezes, pegadas, arranhados e tocas de lontras ao longo de 3 km de margens e leito. Registros de outros mamíferos também foram observados. Cada evidência foi anotada em caderneta de campo, fotografada e georreferenciada. As tocas foram monitoradas ao longo das campanhas. Considerando as lontras, foram registrados 102 vestígios (11 arranhados, 11 pegadas e 80 fezes e 17 tocas no rio não afetado (RP; e o rio afetado (RSC apresentou apenas quatro vestígios (três pegadas, uma amostra fecal e uma toca. Registros de outros mamíferos denotaram a presença de oito táxons no RP e 14 táxons no RSC. As diferenças conspícuas entre a quantidade de vestígios da presença das lontras indicam que o desastre natural afetou a população de lontras do RSC e mesmo dois anos após o evento as lontras retornaram apenas discretamente ao rio afetado. Por outro lado, outras espécies de mamíferos como Cuniculus paca (Linnaeus, 1758, reocuparam as margens abundantemente.

  4. Rentabilidade da monta natural e inseminação artificial em tempo fixo na pecuária de corte = Profitability of natural mating and fixed-time artificial insemination in beef cattle

    Directory of Open Access Journals (Sweden)

    Glauber dos Santos

    2018-02-01

    Full Text Available O futuro da pecuária de corte e consequentemente sua rentabilidade estão atrelados a otimização do uso da terra, visto que em muitos estados sua área vem sendo ocupada pela agricultura. Uma das alternativas é o uso de biotecnologias da reprodução, como a inseminação artificial em tempo fixo [IATF] que permite a inseminação de animais sem a detecção do estro. O objetivo desse estudo foi avaliar o custo por prenhez da monta natural [MN] e da IATF em fêmeas pluríparas em um rebanho de corte. Os animais foram divididos em dois grupos: MN (n = 150 e IATF (n = 150. O custo por prenhez incluiu itens como vida útil do touro, depreciação, remuneração do capital e remuneração de funcionários, entre outros. O custo na MN foi calculado a partir de um valor de compra de R$ 9.000,00, taxa de prenhez de 75% e proporção de um touro para 30 vacas. Na IATF foi baseado na taxa de prenhez de 87% e valor do serviço por animal de R$ 60,00. O custo por prenhez foi de R$ 117,62 e R$ 217,66 para a MN e a IATF, respectivamente. As vantagens da utilização da IATF foram, maior taxa de prenhez no início da estação de monta, antecipação de partos, formação de lotes de bezerros mais pesados a desmama e diminuição do descarte involuntário. Desta forma, apesar de um investimento inicial maior, a IATF teve um bom custo/benefício e rentabilidade. = The future of beef cattle and consequently its profitability are tied to the optimization of land use, since in many states its area has been occupied by agriculture. One of the alternatives is the use of breeding biotechnologies, such as fixed-time artificial insemination [FTAI], which allows the insemination of animals without the detection of estrus. The objective of the present study was to evaluate the pregnancy cost of natural mating [NM] and FTAI in pluriparous females in a beef herd. The animals were divided into two groups: NM (n = 150 and FTAI (n = 150. The cost per pregnancy included

  5. Natural lectin activity in the haemolymph of Panstrogylus megistus (Heteroptera: Reduvidae Atividade lectínica na hemolinfa de Panstrongylus megistus (Heteroptera: Reduviidae

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    Y. M. Gomes

    1988-12-01

    Full Text Available The haemolymph of Panstrongylus megistus showed a natural lectin activity for a wide range of vertebrate erythocytes. Agglutination was observed against all vertebrate erythrocytes tested (human ABO, duck, rabbit, mouse, sheep, chicken and cow. Cow erythrocytes showed the lowest titre. Concerning human erythrocytes, the lectin activity was similar in the types A+,B+ and AB+ while the highest activity was observed in the type O+. Determination of minimal inhibitory concentrations was carried out with human erythrocytes type O+. Agglutination was inhibited by several carbohydrates (rhamnose. D-galatose, raffinose, D-lactose and D-fucose. Rhamnose wasreported as the strongest inhibitor (0.78mM. The results suggest the presence of more than one lection in the haemolymph of P. megistus.A hemolinfa de Panstrongylus megistus mostrou uma atividade lectínica natural para eritrócitos de vários vertebrados e não mostrou especificidade para os diversos tipos de eritrócitos testados (humano ABO, pato, coelho,c amundongo,carneiro, galinha e boi. Com relação aos eritrócitos humanos a atividade lectínica foi similar nos tipos A+, B+ e AB+ enquanto a atividade mais alta foi observada no tipo O+. O título de aglutinação entre eritrócitos animais não mostrou diferença apreciável, excluindo eritrócitos de boi, que apresentaram o título mmais baixo. A determinação da concentração mínima de inibição foi realizada com eritrócitos humanos O+. A aglutinação foi inibida por vários carboidratos (ramnose, D-dalactose, rafinose, D-lactose e D-fucose. A ramnose foi o inibidor mais potente (0,78 mM. Os resultados sugerem a presença de mais de uma lectina na hemolinfa de P. megistus.

  6. Estenose pulmonar valvar discreta: a possível cura espontânea na evolução natural do defeito Mild pulmonary valve stenosis: the possible spontaneous cure in the natural history of the defect

    Directory of Open Access Journals (Sweden)

    Edmar Atik

    2006-05-01

    Full Text Available OBJETIVO: Determinar a evolução natural, a longo prazo, de pacientes com estenose pulmonar valvar discreta. MÉTODOS: No período evolutivo de 24 anos (1980 a 2004, foram avaliados 83 pacientes com estenose pulmonar valvar, sendo 29 destes em grau discreto. Destes 29, foram acompanhados, a longo prazo, 13 pacientes. A idade média na primeira e na última consulta correspondeu a 34 meses (1 mês a 15 anos e 10,5 anos (3 a 24 anos, respectivamente. Avaliaram-se, como elementos evolutivos, os referentes à clínica, os aspectos eletrocardiográficos e os ecocardiográficos. RESULTADOS: Todos os pacientes mantiveram-se assintomáticos. Quanto ao gradiente de pressão valvar pulmonar, em 5 (38,4% houve diminuição, manutenção em 3 (23%, eliminação em 4 (30,7% e acentuação para grau moderado em 1 (7,6%. O gradiente médio inicial e final foi de 24,2 mmHg (15 a 30 e de 13,6 mmHg (0-54. Os gradientes iniciais dos 4 pacientes que obtiveram a cura espontânea eram de 30, 19, 30 e 20 mmHg. O sopro sistólico e a sobrecarga ventricular direita guardaram relação com o grau do gradiente de pressão, subdividido a cada 10 mmHg. CONCLUSÃO: A cura espontânea da estenose pulmonar valvar discreta é possível, de igual modo que ocorre em outras anomalias acianogênicas.OBJECTIVE: To determine the long-term natural history of patients with mild pulmonary valve stenosis METHODS: Throughout a 24-year evolutive period (1980 a 2004, 83 patients with pulmonary valve stenosis were evaluated, with 29 of them presenting a mild form of the defect. Of these 29, 13 patients had a long-term follow up. The mean age at the first and last follow-up visits was 34 months (1 month to 15 years and 10.5 years (3 to 24 years, respectively. In addition to evolutive elements, those regarding clinical, electrocardiographic and echocardiographic aspects were also assessed. RESULTS: All patients remained assymptomatic throughout the study. Regarding the pulmonary valve

  7. Heparinoides naturais isolados de rodofíceas (Halymenia sp. arribadas na costa cearense =Natural heparinoids isolated from Halymenia sp. (Rhodophyceaes delivery on the Ceará coast

    Directory of Open Access Journals (Sweden)

    José Ariévilo Gurgel Rodrigues

    2010-07-01

    Full Text Available A crescente carência de heparina (HEP motiva a busca por fontes alternativas de novos anticoagulantes naturais. Objetivou-se avaliar a atividade anticoagulante dos polissacarídeos sulfatados (PS isolados de uma rodofícea do gênero Halymenia, nativa do litoral cearense, Brasil. Os PS totais foram obtidos por digestões consecutivas com papaína em tampão acetato de sódio 0,1 M (pH 5,0, contendo cisteína 5 mM e EDTA 5 mM, seguidas por cromatografia de troca iônica em coluna de DEAE-celulose. As frações obtidas foram concentradas por liofilização e submetidas à eletroforese em gel de agarose a 0,5%. Os ensaios anticoagulantes foram realizados pelo tempo de tromboplastina parcial ativada (TTPA, usando-se plasma de coelho e uma curva padrão de HEP (100 UI mg-1. As extrações (53,96% mostraram diferenças marcantes durante o fracionamento e no grau de resolução dos PS. A espécie apresentou PS com atividade anticoagulante superior a HEP. O TTPA das frações modificou-se acentuadamente entre as extrações, expressando-se de maneira dose-dependente e sofrendo um acréscimo de 110,40 (1a extração para 143,10 UI mg-1 (3a extração. Os resultados sugerem que a atividadeanticoagulante dos PS isolados de Halymenia sp. foi promovida pela inibição da via intrínseca e/ou comum da cascata de coagulação. As modificações no TTPA possivelmente serão elucidadas pelos mecanismos de ação envolvidos na coagulação e caracterização estrutural desses compostos. Portanto, a rodofícea Halymenia sp. é uma boa fonte de heparinoides e sugerem-se estudos relacionados ao cultivo da espécie, em proteção aos bancos de algas.The increasing demand for heparin (HEP has led to a search for alternative sources of natural anticoagulants. This study aimed to evaluate the anticoagulant activity of sulfated polysaccharides (SP isolated from a Halymenia rhodophyceae genus native to the coast of Ceará, Brazil. Total SP were obtained by consecutive

  8. Natural latex graft in lamellar and penetrating sclerectomies in rabbits Enxerto de látex natural na cicatrização de esclerectomias lamelar e penetrante em coelhos

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    Ivia Carmem Talieri

    2009-09-01

    Full Text Available The objective of study was to investigate the effects of natural latex with 0.1% of polylysine on lamellar and penetrating scleroctomies in rabbits. Two groups of twelve rabbits each (lamellar GI and penetrating GII were studied. Scleral square incisions near the limbus were performed on the left eye of each animal. The latex biomembrane was fixed to the recipient sclera and it covered with a conjunctival flap. The clinical evaluations were followed for 60 days. Aplannation tonometry, binocular indirect ophthalmoscopy and slit-lamp biomicroscopy were performed during evaluation. Bright field microscopy and polarization microscopy were employed. Blepharospasm, graft infection, mucoid ocular discharge and chemosis were not observed in either treatment group. The conjunctival hyperemia varied from moderate to hardly noticeable. The postoperative IOP was not statiscally significant, comparing to the preoperative IOP, for GI and GII. The histopathology by polarization microscopy showed that the neoformed tissue was primarily dependent on adjacent vascularized tissues and was constituted by collagen type III. Both groups presented optimum graft adhesion to the receiving sclera. The natural latex biomembrane with 0.1% polylysine constitutes a new alternative for scleral reconstruction. Furthermore, this is a durable material, easy to obtain and manipulate.Este trabalho teve como objetivo investigar os efeitos do látex natural com polilisina a 0,1% na cicatrização de esclerectomias lamelar e penetrante em coelhos. Foram estudados dois grupos de 12 coelhos (GI - lamelar e GII - penetrante. As esclerectomias foram realizadas no olho esquerdo de cada animal. A biomembrana de látex foi fixada à esclera receptora e foi recoberta com conjuntiva bulbar. As avaliações clínicas foram realizadas durante 60 dias. Para tal, empregaram-se a tonometria de aplanação, a oftalmoscopia indireta binocular e a biomicroscopia em lâmpada de fenda. Realizou-se an

  9. Sinergias entre Luxemburgo, ACNUR y Skype

    OpenAIRE

    Bertout, Antoine; Bourcy, Marc de; Faisal, Mohammad

    2011-01-01

    Una reciente asociación estratégica entre ACNUR, el Gobierno de Luxemburgo y el proveedor de software para comunicaciones Skype permite al personal de ACNUR en zonas de condiciones de vida difíciles mantenerse en contacto con sus familiares y amigos. Los socios evalúan de qué forma podría adaptarse la tecnología para otras organizaciones humanitarias.

  10. DiGIR1 and NaGIR1: naturally occurring group I-like ribozymes with unique core organization and evolved biological role

    DEFF Research Database (Denmark)

    Johansen, Steinar; Einvik, Christer; Nielsen, Henrik

    2002-01-01

    introns (twin-ribozyme introns) in distantly related organisms. The Didymium GIR1 (DiGIR1) and Naegleria GIR1 (NaGIR1) share fundamental features in structural organization and reactivity, and display significant differences when compared to the related group I splicing ribozymes. GIR1 lacks...

  11. Mudanças das rotinas familiares na transição inesperada por desastre natural Cambios sobre las rutinas familiares en la transición inesperada por desastre natural Family routines changes in the unexpected transition due to natural disasters

    Directory of Open Access Journals (Sweden)

    Gisele Cristina Manfrini Fernandes

    2013-03-01

    Full Text Available Desastres naturais são eventos disruptivos às rotinas e rituais familiares e promovem mudanças significativas na vida e na saúde. O objetivo deste artigo foi discutir as rotinas diárias ao longo das trajetórias na transição familiar pela ocorrência de um desastre natural ocorrido em uma área rural. Trata-se de um estudo qualitativo de múltiplos casos, realizado com seis famílias com crianças. Os dados foram coletados em 2010, com técnicas de observação participante, entrevista narrativa, genograma, ecomapa e o calendário de rotinas familiares. Foi feita a análise das narrativas, e os resultados revelaram a mudança nas rotinas e rituais nas trajetórias entre o pré, o pós-desastre e atualidade. A transição abrupta gerou reações estressantes, afetando a saúde dos membros. São necessários mais estudos sobre a saúde no pós-desastre que contribuam ao conhecimento, ao ensino e à prática do cuidado de enfermagem, especialmente na estratégia de saúde da família.Los desastres naturales son eventos disruptivos a las rutinas y rituales familiares y promueven cambios significativos en la vida y en la salud. El objetivo de este artículo es discutir las rutinas diarias a lo largo de las trayectorias en la transición familiar debido a un desastre natural ocurrido en un área rural. Se trata de un estudio cualitativo de múltiples casos, realizado con seis familias con niños. Los datos fueron obtenidos en 2010, con técnicas de observación participante, entrevista narrativa, genograma, ecomapa y el calendario de rutinas familiares. Se realizó un análisis de las narrativas y los resultados revelaron cambios en las rutinas y rituales, en las trayectorias entre el pre y el post desastre y la actualidad. La transición abrupta generó reacciones estresantes, afectando la salud de los miembros. Se hace necesario más estudios sobre la salud en el post desastre, que contribuyan al conocimiento, enseñanza y práctica del

  12. Simulação computacional integrada para a consideração da luz natural na avaliação do desempenho energético de edificações

    Directory of Open Access Journals (Sweden)

    Evelise Leite Didoné

    Full Text Available A luz natural é uma importante estratégia para redução do consumo de energia em edificações. Para sua previsão, recomenda-se a utilização de programas de simulação que empregam arquivos climáticos e processam as simulações com o conceito do Daylight Coefficients. O EnergyPlus, programa para simulação termoenergética, é uma dessas ferramentas. Porém, este software possui limitações no módulo de iluminação natural que superestimam a luz natural em ambientes internos. Para contornar essas limitações, o presente trabalho propõe uma metodologia para avaliação da eficiência energética, considerando o aproveitamento da luz natural, através da utilização de dois programas. A metodologia consiste na avaliação do desempenho luminoso e energético através de simulação com os programas Daysim e EnergyPlus. O Daysim produz um relatório que descreve o controle da iluminação artificial que é utilizado na simulação energética do EnergyPlus, que calcula o consumo energético final dos ambientes analisados. Os resultados indicam que a metodologia proposta mostrou-se adequada para suprir as limitações do EnergyPlus e para a avaliação da eficiência energética em edificações, considerando o aproveitamento da luz natural. Este trabalho mostra um caminho alternativo e confiável para a consideração do aproveitamento da iluminação natural na avaliação da eficiência energética de edificações.

  13. Research with a Natural-Uranium Light-Water Subcritical Assembly; Recherches au Moyen d'un Ensemble Sous-Critique a Uranium Naturel et a Eau Ordinaire; Issledovaniya na podkriticheskoj sborke,rabotayushchej na prirodnom urane i obychnoj vode; Investigaciones con un Conjunto Subcritico de Uranio Natural y Agua Ligera

    Energy Technology Data Exchange (ETDEWEB)

    Koskinen, H. [Institute of Technical Physics, Otaniemi (Finland)

    1964-02-15

    natural-agua ligera, en especial de la validez de los modelos de frenado de pocos grupos para cuerpos de estructura uniforme y no uniforme. Los conjuntos con una sola fuente de fision espontanea se consideran particularmente adecuados para las investigaciones de esta clase, aunque la estadistica solo abarca un numero reducido de observaciones. Esto se debe a dos hechos: 1. El espectro de la fuente primaria se puede considerar identico al de la fision inducida, por lo que no existen fluctuaciones transitorias de energia como en el caso de una fuente puntiforme de neutrones rapidos. 2. La intensidad de la fuente primaria en cada punto del espacio es proporcional a la seccion eficaz de fision del combustible cuando esta ultima se considera en funcion de las coordenadas espaciales. Esta particularidad contribuye a simplificar las ecuaciones de flujo y permite, en muchos casos, hallar una analogia con los sistemas criticos. Un analisis minucioso de las distribuciones de flujo en sistemas de esta clase proporciona datos sobre la validez de modelos especiales de frenado. Tambien es posible obtener algunas aclaraciones sobre problemas como la fision rapida por interaccion y la probabilidad de escape por resonancia en funcion del espacio. El autor estima que, debido a sus multiples aplicaciones y a su seguridad intrinseca, los conjuntos subcriticos con moderador liquido constituyen casi la unica posibilidad de estudiar sistematicamente reticulados no uniformes. Existe el proposito de anadir a ese conjunto elementos enriquecidos. Ello permitira proceder al estudio sistematico de reticulados mixtos, y debido al flujo mas elevado, facilitara tambien el estudio de otros factores no uniformes. La memoria expone algunos aspectos de ese programa futuro. (author) [Russian] Soobshhaetsja ob issledovanijah na podkriticheskoj sborke, rabotajushhej na prirodnom urane i obychnoj vode. Predstavleny takzhe nekotorye temy iz programmy budushhih issledovanij. Material bol'shej chast'ju javljaetsja

  14. A desmineralização/ descelularização dentária na confecção de scaffold natural

    OpenAIRE

    Iwamoto, Luciana Aparecida de Sousa [UNIFESP

    2015-01-01

    Introdução: A Engenharia Tecidual (ET) é uma ciência multidisciplinar que visa produzir órgãos e partes humanas substitutas acometidas por lesões traumáticas, doenças degenerativas ou agenesias. Uma das suas etapas é a produção de arcabouços biocompatíveis para aplicação na Medicina Regenerativa. Estas estruturas são conhecidas como scaffolds, que apresentam macrogeometria semelhante ao tecido original, em textura e porosidade e direcionam o comportamento das células que ...

  15. Nature of weak inter- and intramolecular interactions in crystals. Communication 5. Interactions Na...H-B in a crystal of sodium salt of charge compensated nido-carborane [9-SMe2-7,8-C2B9H10]-

    International Nuclear Information System (INIS)

    Lysenko, K.A.; Golovanov, D.G.; Meshcheryakov, V.I.; Kudinov, A.R.; Antipin, M.Yu.

    2005-01-01

    The character of electron density distribution in the C 2 B 3 open face, the influence of the SMe 2 group on the character of electron density distribution, and the nature of the sodium-anion interaction were studied based on the data of high-resolution X-ray diffraction study of crystals of the sodium salt of charge-compensated nido-carborane [9-SMe 2 -7,8- C 2 B 9 H 10 ] - and quantum-chemical calculations for the Na...H-B-bonded dimer, the isolated [9-SMe 2 -7,8-C 2 B 9 H 10 ] - anion, and the [7,8-C 2 B 9 H 10 ] 2- dianion. The character of electron density distribution in the C 2 B 3 open face is analogous to the electron distribution in the cyclopentadienyl ligand. In nido-carborane, a substantial charge redistribution takes place compared to that observed in the closo analogs. The topological analysis of the electron density distribution function demonstrated that the cation-anion interactions are determined predominantly by Na...H-B contacts. The total energy of these contacts in the {[9-SMe 2 -7,8-C 2 B 9 H 10 ]Na(thf) 2 } 2 dimer estimated from X-ray diffraction data is 11.74 kcal mol -1 [ru

  16. Self-organizing maps applied to two-phase flow on natural circulation loop study; Aplicacao de mapas auto-organizaveis na classificacao de padroes de escoamento bifasico

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Leonardo Ferreira

    2016-11-01

    Two-phase flow of liquid and gas is found in many closed circuits using natural circulation for cooling purposes. Natural circulation phenomenon is important on recent nuclear power plant projects for decay heat removal. The Natural Circulation Facility (Circuito de Circulacao Natural CCN) installed at Instituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN, is an experimental circuit designed to provide thermal hydraulic data related to single and two-phase flow under natural circulation conditions. This periodic flow oscillation behavior can be observed thoroughly in this facility due its glass-made tubes transparency. The heat transfer estimation has been improved based on models that require precise prediction of pattern transitions of flow. This work presents experiments realized at CCN to visualize natural circulation cycles in order to classify two-phase flow patterns associated with phase transients and static instabilities of flow. Images are compared and clustered using Kohonen Self-organizing Maps (SOM's) applied on different digital image features. The Full Frame Discret Cosine Transform (FFDCT) coefficients were used as input for the classification task, enabling good results. FFDCT prototypes obtained can be associated to each flow pattern, enabling a better comprehension of each observed instability. A systematic test methodology was used to verify classifier robustness.

  17. Especiarias como antioxidantes naturais: aplicações em alimentos e implicação na saúde Spices as natural antioxidants: their application in food and implication for health

    Directory of Open Access Journals (Sweden)

    P.V Del Ré

    2012-01-01

    Full Text Available O crescente interesse na substituição de antioxidantes sintéticos por naturais em alimentos tem fomentado a pesquisa sobre fontes vegetais, caracterização de matérias-primas e identificação de novos compostos antioxidantes. As reações de oxidação não são uma preocupação exclusiva das indústrias alimentícias, seu estudo é também amplamente necessário para evitar implicações indesejáveis na saúde humana. O objetivo desta revisão, depois de apresentar aspectos gerais sobre a oxidação, é concentrar-se nos benefícios da utilização das especiarias como antioxidantes naturais, em especial as da família Labiatae, amplamente utilizadas na culinária brasileira.The growing interest in replacing synthetic antioxidants by natural antioxidants in food has stimulated research on vegetable sources, raw material characterization and identification of new antioxidant compounds. Oxidation reactions are not an exclusive preoccupation of the food industry; studies regarding this issue are widely necessary in order to prevent undesired implications for human health. The aim of this review, after presenting overall aspects about oxidation, is to concentrate on the benefits of using spices as natural antioxidants, especially those from the Labiatae family, which are widely used in the Brazilian cuisine.

  18. Geotecnologias como suporte para análise da vegetação natural na sub-bacia hidrográfica do Rio Gavião (1988 a 2015

    Directory of Open Access Journals (Sweden)

    Carlos Magno Santos Clemente

    2017-06-01

    Full Text Available O histórico de ocupação da sub-bacia do rio Gavião passou por transformações socioeconômicas expressivas nos últimos 30 anos. Desse modo, preocupações com preservação ou recuperação da cobertura vegetal influência, positivamente, na manutenção do ciclo hidrológico da sub-bacia. A presente pesquisa tem como objetivo analisar a modificação da vegetal natural entre os anos de 1988 a 2015 na sub-bacia hidrográfico do rio Gavião (semiárido brasileiro. Foram utilizadas as como suporte técnico o sensoriamento remoto, Processamento Digital de Imagens - PDI e o Sistema de Informações Geográficas - SIG (satélites landsat 5 e landsat 8. Os resultados indicam redução da cobertura vegetal de 751,69 km², entre os anos de 1988 a 2015. Também, manchas de desmatamento em áreas de nascentes, na parte alta da rede de drenagem e no dessegue do canal principal. Assim, a presente pesquisa chama atenção para os efeitos da mudança da vegetação natural para outros usos da terra (solo exposto, plantio, entre outros, a concentração do desmatamento em áreas de fragilidade ambiental.

  19. Inadequate management of natural ecosystem in the Brazilian Amazon region results in the emergence and reemergence of arboviruses Gestão imprópria do ecossistema natural na Amazônia brasileira resulta na emergência e reemergência de arbovírus

    Directory of Open Access Journals (Sweden)

    Pedro F. C. Vasconcelos

    2001-01-01

    Full Text Available A total of 187 different species of arboviruses and other viruses in vertebrates were identified at the Evandro Chagas Institute (IEC from 1954 to 1998, among more than 10,000 arbovirus strains isolated from humans, hematophagous insects, and wild and sentinel vertebrates. Despite intensive studies in the Brazilian Amazon region, especially in Pará State, very little is known about most of these viruses, except for information on date, time, source, and method of isolation, as well as their capacity to infect laboratory animals. This paper reviews ecological and epidemiological data and analyzes the impact of vector and host population changes on various viruses as a result of profound changes in the natural environment. Deforestation, mining, dam and highway construction, human colonization, and urbanization were the main manmade environmental changes associated with the emergence and/or reemergence of relevant arboviruses, including some known pathogens for humans.Um total de 187 diferentes espécies de arbovírus, além de outros vírus de vertebrados, foram identificados pelo Instituto Evandro Chagas (IEC no período de 1954 a 1998, entre as mais de 10.000 cepas de vírus isoladas de seres humanos, insetos hematófagos e vertebrados-sentinela e silvestres. Apesar dos estudos intensivos realizados na Amazônia brasileira, sobretudo no Estado do Pará, pouco se sabe a respeito da maioria desses vírus, com exceção de dados a respeito de data, hora, fonte e método de isolamento, assim como a capacidade de infectar animais laboratoriais. Os autores fazem uma revisão dos dados ecológicos e epidemiológicos e procuram associar o impacto, sobre os diversos vírus, das mudanças populacionais dos vetores e hospedeiros induzidas por profundas alterações no meio ambiente. O desmatamento, o uso do subsolo, a construção de represas e de rodovias, a colonização humana e a urbanização foram as principais modificações ambientais

  20. Natural activity in Hudson River estuary samples and their influence on the detection limits for gamma emitting radionuclides using NaI gamma spectrometry

    International Nuclear Information System (INIS)

    Wrenn, M.E.; Jinks, S.M.; Hairr, L.M.; Paschoa, A.S.; Lentsch, J.W.

    1972-01-01

    Sources of natural radioactivity in Hudson River Estuary are described. The technique of analysis for gamma spectrometry of environmental samples is presented and its pros and cons discussed. The distribution of natural radioactivity in water, biota and sediment was reported as well as the role played by the vertical distribution of cesium-137 in sediments as an indicator of the rate of sedimentation. The effect of the presence of natural radionuclides on the detection limits of man-made nuclides in the Hudson River environment is thoroughly examined. The results obtained with a 4-in. sodium iodide well crystal housed in a low background mercury shielding compare favorably with a more sophisticated Ge(Li) system which uses anticoincidence, as far as the analysis of environmental samples is concerned. (U.S.)

  1. MCNP simulation of detection efficiency of NaI and measuration of natural radionuclide contents in soil in the northeast China

    International Nuclear Information System (INIS)

    Peng Bangbao; Yan Qiang; Li Taosheng; Li Zhi

    2012-01-01

    Using the standard earth sample, the full-energy peak detection efficiency of NaI(Tl) detector for γ rays with the biggest branching ratio emitted from the isotopes of 40 K, 226 Ra, 232 Th, 238 U in earth was measured. And the same efficiency also simulated with the code of MCNP. The results obtained by both methods matched well and the difference between the two results was no more than 5 percent. To calculate the maximum error induced by the variation of detection efficiency from the difference of the density of earth samples, the detection efficiency under the different density of earth samples was investigated with MCNP code. Based on the work mentioned above, some typical samples of earth and architectural materials were measured. Compared with data form literature, the results were reasonable and had some reference value in this field. (authors)

  2. Vale do Aco pipeline: pipeline natural gas implementation in ArcelorMittal Monlevade steel work; Gasoduto Vale do Aco: implantacao do gas natural via gasoduto na ArcelorMittal Monlevade

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, Eduardo Sergio da Silva; Arantes, Luiz Flavio Mourao; Ribeiro, Vicente Aleixo Pinheiro [ArcelorMittal Monlevade, Joao Monlevade, MG (Brazil)

    2011-12-21

    Since September 2010, ArcelorMittal Monlevade has gained flexibility and an important opportunity to reduce the cost of its energy mix due to the arrival of the Natural Gas (NG) via Steel Valley Pipeline. The proposal of the project included the substitution of the Liquefied Petroleum Gas (LPG), Fuel Oil and Compressed Natural Gas for natural gas via pipeline. To support the investment decision, in addition to domestic economic and technical aspects, the macro economic environment concerning the NG was also taken into account. This paper shows the analysis for adjustment of internal equipment, the structure of the contract, the conceptual project of the gas distribution built inside the main events, the gains achieved, the alternatives for the acquisition of NG and operational flexibility of ArcelorMittal Monlevade in case of interruption of supply of natural gas. (author)

  3. Florística e classificação da regeneração natural em Floresta Ombrófila Mista na Floresta Nacional de São Francisco de Paula, RS.

    Directory of Open Access Journals (Sweden)

    Igor da Silva Narvaes

    2009-10-01

    Full Text Available Normal 0 21 MicrosoftInternetExplorer4 Na floresta Ombrófila Mista, a regeneração natural é pouco estudada. No Rio Grande do Sul, em conseqüência da ação antrópica, essas florestas se encontram sob diferentes condições de alteração, em alguns casos formando fragmentos. O estudo teve como objetivo analisar a florística da regeneração natural e verificar a ocorrência de grupos florísticos de uma área onde não foram constatadas alterações intensas. A área com 1606,69 ha localiza-se na Floresta Nacional de São Francisco de Paula (entre 29° 23' e 29° 27' S; 50° 23' e 50° 25' W, no município de São Francisco de Paula, RS. No estudo, foram selecionadas seis parcelas permanentes de crescimento do PELD (Projeto Ecológico de Longa Duração cuja vegetação foi inventariada, utilizando-se dez faixas paralelas entre si e perpendiculares à direção da posição topográfica, as quais apresentaram 10 m de largura e 100 m de comprimento, subdivididas em dez unidades de 100 m² onde foram sorteadas três unidades amostrais por faixa para identificação e medição (altura e circunferência de indivíduos com Cap maior ou igual a 3 cm e menor de 30 cm. Os cipós, trepadeiras e ervas também tiveram suas circunferências medidas e identificados até o nível de espécie, quando possível. Os dados de densidade por espécie formaram uma matriz (180x70 utilizada na análise multivariada. A presença de agrupamento de vegetação em estado de regeneração natural no interior da floresta foi testada pelo Método TWINSPAN (Two-way indicator species analysis. Constatou-se a existência de três grupos ecológicos (G-1, G-2 e G-3. O G-1 foi caracterizado por boa disponibilidade hídrica, por possuir características ambientais intermediárias e por situar-se na posição topográfica referente à encosta média; G-2 ocorreu na encosta inferior da floresta, apresentando forte influência da umidade e sujeita a alagamentos espor

  4. Virus inactivation by salt (NaCl) and phosphate supplemented salt in a 3D collagen matrix model for natural sausage casings

    NARCIS (Netherlands)

    Wieringa-Jelsma, H.; Wijnker, J.J.; Zijlstra-Willems, E.M.; Dekker, A.; Stockhofe-Zurwieden, N.; Maas, R.; Wisselink, H.J.

    2011-01-01

    Due to possible presence and spread of contagious animal viruses via natural sausage casings the international trade in these food products is subject to veterinary and public health requirements. In order to manage these restrictions we determined the effect of casing preservation on four highly

  5. Use of biogas generated from swine manure as preliminary agent in the feasibility construction of natural gas networks; Utilizacao do biogas gerado a partir de dejetos suinos como agente preliminar na viabilizacao da construcao de redes de gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Antonio Rogerio; Ferraz, Andre; Rocha, Ivan; Azevedo, Jorge; Oshiro, Hugo K.; Konishi, Ricardo; Piazza, Walter; Lehmkuhl, Willian [Companhia de Gas de Santa Catarina (SCGAS), Florianopolis, SC (Brazil)

    2011-12-21

    Santa Catarina state has over 800 km of natural gas distributed along the coast line, however, has an area of 95.700 km{sup 2}. Due to mountainous relief, constructing pipeline that will supply natural gas to remote areas will prove difficult. Supplying gas to remote areas through biogas from pig manure is a feasible alternative to building a gas pipeline to these regions. Using data from the IBGE and by aid of computer programs it was found that Santa Catarina has a potential to generate biogas from 900.000 m{sup 3}/day which are located predominantly in the western region of state. Thus, through the provision of biogas in this region a market that uses natural gas as an energy source can stimulate. As result the pay-back time and the feasibility risk of a network gas project can be reduced. It was found that only in the west there is an energy potential to be shifted to natural gas equivalent of 389.583 m{sup 3}/day and as expected output is estimated to reach 16.728 m{sup 3}/day. This helps anticipate the building of a natural gas network that links the coast with outskirts of the state, while the environmental impact of swine as methane emissions and waste are reduced. (author)

  6. TEMPERATURA DOS SOLOS E SUAS INFLUÊNCIAS NA REGENERAÇÃO NATURAL DA CAATINGA NOS CARIRIS VELHOS – PB

    Directory of Open Access Journals (Sweden)

    Bartolomeu Israel de Souza

    2016-04-01

    Full Text Available A Caatinga vem sofrendo alterações históricas através da retirada maciça da vegetação para o desenvolvimento de diversas atividades econômicas, o que vem acarretando uma série de problemas ambientais e, dentre estes, o aumento da temperatura dos solos. Esse trabalho foi desenvolvido na região dos Cariris Velhos – PB, uma das mais atingidas pelo desmatamento no semiárido brasileiro, com o objetivo de identificar como esse processo tem afetado a temperatura dos solos, estabelecendo relações com a capacidade de germinação das sementes de plantas nativas da Caatinga em função dos níveis térmicos identificados, características ainda pouco conhecidas e de fundamental importância para que se possa compreender melhor a sucessão ecológica em áreas degradadas. Neste trabalho, foi analisada uma série histórica de dados de temperaturas de subsuperfície, obtidos através de geotermômetros, submetidos a tratamento estatístico, e de superfície, através do uso de imagens de satélite, seguida de um levantamento da capacidade de germinação de sementes da Caatinga em diferentes condições térmicas. Os resultados obtidos indicam que o desmatamento vem acarretando a elevação da temperatura média dos solos, atualmente dominando níveis superiores a 350C em grande parte da região, para os quais a maioria das sementes das espécies consultadas não se desenvolveria, tornando ainda mais difícil a recuperação destes ambientes. Os dados apresentados apontam a urgência em evitar a expansão do desmatamento na Caatinga, assim como a criação de medidas de recuperação dos ambientes desertificados.

  7. Influence of natural or organophilic bentonite for flammable of the poly(ethylene-co-vinyl acetate); Influencia da bentonita natural ou organofilica na inflamabilidade do poli(etileno-co-acetato de vinila)

    Energy Technology Data Exchange (ETDEWEB)

    Heyder, Eduardo T.; Kloss, Juliana R.; Morita, Reinaldo Y., E-mail: yomorita1@gmail.com [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba,PR (Brazil). Departamento de Quimica e Biologia; Caetano, Elenice H.; Andrade, Andre Vitor C. de [Universidade Estadual de Ponta Grossa (UEPG), Ponta Grossa, PR (Brazil); Barbosa, Ronilson V. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Departamento de Quimica

    2015-07-01

    The manufacture polymeric applied in electrical sector in general use additives which act as flame retardants, for example, some borates, phosphates, and halogenated hydroxides. An alternative material for this purpose frequently reported in the literature because the flame resistance or flame retardancy is organoclay. Thus, the objective of this study is to evaluate the flammability of mixtures of EVA/natural bentonite and EVA/organoclay containing modifier as a species free of quaternary ammonium ions. The natural bentonite and organoclay were characterized by X-ray diffraction and scanning electron microscopy and materials were evaluated by X-ray diffraction and the flammability test. Regarding the combustion rate values, there was a reduction of flame propagation in EVA/natural bentonite (3.0%), showing that in this case the clay without modifier acted as a physical barrier and promoted retardant action of flame. (author)

  8. Human action in a Genomic Era: debates on human nature Ação humana na Era do Genoma: debates sobre a natureza humana

    Directory of Open Access Journals (Sweden)

    Tatiana Gomes Rotondaro

    2009-03-01

    Full Text Available The supposed properties of 'genes' have led natural scientists to claim authority to explain the reasons of human action, behavior, and even human nature, which has traditionally been the object of study of the humanities. The aim of this paper is to discuss the possibilities of sociological theory dealing with the biological reductionism that establishes the strict articulation between 'human nature' and 'human action', presented in several speeches and papers by scientists and journalists and supported by features of 'genes'. I intend to argue that sociological theories may broaden their scope of analysis by encompassing biological dimensions, which does not necessarily mean adopting a biological reductionist approach.As supostas propriedades dos 'genes' levam os cientistas naturais a reivindicar autoridade para explicar as razões de atos, comportamentos e até a natureza humana, tradicional objeto de estudo das ciências humanas. O objetivo deste artigo é discutir as possibilidades de a teoria sociológica lidar com o reducionismo biológico, que estabelece uma articulação exata entre 'natureza humana' e 'ação humana'. Tal reducionismo está presente em discursos e artigos de cientistas e jornalistas, e é embasado por características dos 'genes'. Argumento que as teorias sociológicas podem ampliar suas possibilidades de análise se incorporarem dimensões biológicas, o que não implica necessariamente adotar uma abordagem reducionista.

  9. A natureza argumentativa dos processos inferenciais preditivos na compreensão textual The argumentative nature of the predictive inferencial processes of the textual comprehension

    Directory of Open Access Journals (Sweden)

    Tícia Cassiany Ferro Cavalcante

    2012-04-01

    Full Text Available No presente estudo, propõe-se que a inferência de predição é um processo cognitivo/discursivo de natureza eminentemente argumentativa. Partindo desta proposta teórica, o estudo empírico relatado teve como objetivo investigar, de forma processual, a produção de inferências preditivas por parte de sete estudantes universitários no curso de uma leitura individualmente realizada (compreensão online. A perspectiva metodológica adotada foi a do estudo de casos em série, em cada um dos quais o participante foi solicitado a responder, em voz audível, a questões formuladas à medida que lia uma crônica. A análise de dados realizada, de natureza notadamente qualitativa e processual, evidencia a natureza essencialmente argumentativa das inferências preditivas produzidas.The present study argues that a prediction inference is a cognitive/discursive process fundamentally of argumentative nature. From this theoretical premise, this empirical study investigated, in a procedural manner, the production of predictive inferences by seven university students, using individual readings (online comprehension. The methodology used was that of case studies in series, in each of which the participant was asked to answer, aloud, questions formulated while he/she was reading a story. The analysis of the data, notably of qualitative and procedural nature, makes evident the essentially argumentative nature of the predictive inferences produced.

  10. Ion exchange reactions of major inorganic cations (H+, Na+, Ca2+, Mg2+ and K+) on beidellite: Experimental results and new thermodynamic database. Toward a better prediction of contaminant mobility in natural environments

    International Nuclear Information System (INIS)

    Robin, Valentin; Tertre, Emmanuel; Beaufort, Daniel; Regnault, Olivier; Sardini, Paul; Descostes, Michael

    2015-01-01

    Highlights: • Multi-site ion exchange model for beidellite for Na + , Ca 2+ , Mg 2+ , K + and H + . • Validity over the 1–7 pH range and total normality >5 × 10 −3 mol/L. • Application to equilibrium between smectite and acidic solution from mining sites. • Impact of crystal chemistry of smectites on their sorption properties. - Abstract: To our knowledge, no thermodynamic database is available in the literature concerning ion-exchange reactions occurring in low-charge smectite with tetrahedral charge (beidellite). The lack of this information makes it difficult to predict the mobility of contaminants in environments where beidellite and major cations, which act as competitors with contaminants for sorption on the clay phase, are present. The present study proposes a multi-site ion exchange model able to describe experimental data obtained for H + and the four major cations (Na + , Ca 2+ , Mg 2+ and K + ) found in natural waters interacting with a <0.3 μm size fraction of Na-beidellite. The nature of the sites involved in the sorption processes is assessed using qualitative structural data. Moreover, the effect of the charge location in the smectite on the selectivity coefficient values is discussed by comparison with the results reported in the literature for smectite characterized by octahedral charge (montmorillonite). The new thermodynamic database proposed in this study is based on the same total sorption site density and distribution of sites regardless of the cations investigated. This database is valid for a large range of physico-chemical conditions: a [1–7] pH range, a total normality higher than 5 × 10 −3 mol/L corresponding to a flocculated state for water/clay systems, and when sorption of ions pairs can be neglected. Note that this study provides evidence that a thermodynamic database describing ion exchange reactions between H + and the four major cations of natural water for smectite cannot be valid irrespective of the total

  11. Market evaluation and investment planning in natural gas industry in Brazil: development of the net distribution pipeline; Avaliacao de mercado e planejamento de investimentos na industria de gas natural no Brasil: perspectivas de crescimento da malha de gasodutos de distribuicao

    Energy Technology Data Exchange (ETDEWEB)

    Avila, Pedro L.; Pamplona, Edson O. [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)

    2008-07-01

    This paper proposes to develop a real options model to decision-making investments in flexible technologies. As a result, finding a closed-form solution, derived from the partial differential equation of the value of flexibility provided by alternative fuels. However, you can present and analysis the results of a practical application using the method to solve real options problems known as binomial model. Initially presents a brief explanation on the method of discounted cash flow, its failures and changes to the real options analysis. In the sequence chart an overview of the natural gas industry on Brazil, emphasizing the need for consistent investments evaluations in the sector. The next section shows the proposed development of mathematical model for assessing the flexibility to choose, obtained by the exchange of fuel for transport of gas pipeline distribution of natural gas. The model takes as the case scenario where the flexible pipeline can carry both natural gas and hydrogen, and the evaluation of the option of exchanging input gives more value to the investment opportunity, and consider the optimum conditions where the option to be exercised. Keywords: Decision Making, Real Options; Natural Gas, Flexible Technology. (author)

  12. Legal regulation of the reuse of water resources in the oil, natural gas and biofuels industry; A regulamentacao juridica do reuso dos recursos hidricos na Industria do petroleo, gas natural e biocombustiveis

    Energy Technology Data Exchange (ETDEWEB)

    Azevedo, Flaviana Marques de; Guimaraes, Patricia Borba Vilar [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2010-07-01

    The Constitution of 1988 is a guide for protect natural resources in the country, it was from her that the right to an ecologically balanced environment was elevated to the category of fundamental human right of all was changed understanding regarding the use water resources, irrigation water is characterized as a resource with economic value. In this scenario emerging legal standards for protecting the environment and water resources, which must necessarily be committed to the development of economic activities that use natural resources, and still worry about their conservation and preservation for the use of present and future generations, in line with the desires dictated by sustainable development. Therefore, this work has the scope to verify the legal regulation of reuse of water resources in the context of activities developed by the oil industry, natural gas and biofuels, to promote optimum use of water resources in the country, and this can lead to benefits social, economic and environmental. The importance of the study emerges precisely in the industrial sector, and specifically in the oil industry, natural gas and biofuels, in order that through these activities is increased the negative potential of natural resources, consequently increasing the ability to cause negative externalities either by adopting systematic contrary to sustainable development, as the high standards of environmental degradation caused by the activities of this kind. The methodology for conducting this study is theoretical and descriptive, developing through the analysis and interpretation of data obtained from the verification of magazines, books and monographs, concerning the subject of water resources and, by examining done about the current environmentalist doctrine and appreciation of constitutional and legislative documents infra constitutional above existing on the subject. (author)

  13. The effects of sulfur intercalation on the optical properties of artificial 'hackmanite', Na8[Al6Si6O24]Cl1.8S0.1; 'sulfosodalite', Na8[Al6Si6O24]S; and natural tugtupite, Na8

    DEFF Research Database (Denmark)

    Warner, Terence Edwin; Hutzen Andersen, Jan

    2012-01-01

    .8S0.1 destroys the tenebrescence and induces a permanently pale blue and, at higher temperature, a pale green coloration. The effect on Na8[Al6Si6O24]S induced similar colorations but of a deeper hue. Annealing tugtupite, Na8[Be2Al2Si8O24](Cl,S)2-x under a sulfur atmosphere over the range 600-700 °C......, destroyed the tenebrescence and resulted in a colourless tugtupite; but did not effect the photoluminescence. This suggests that the chemical species responsible for the tenebrescence in tugtupite is unlikely to be the same as that for the luminescence....

  14. Avaliação do sombreamento natural do flamboyant (Delonix regia na temperatura de um ambiente construído

    Directory of Open Access Journals (Sweden)

    Mário Carlos Rodrigues Ayres

    2011-05-01

    Full Text Available Avaliar o sombreamento de uma espécie arbórea e seus efeitos na temperatura de um ambiente construído a partir das medições de temperatura de globo, temperatura do ar, umidade relativa foi o objetivo deste trabalho. Avaliou-se o sombreamento produzido pela espécie arbórea flamboyant (Delonix regia quanto a atenuação da temperatura no interior de dois módulos de edificações. O local de realização da pesquisa foi a Embrapa agropecuária oeste (CPAO no município de Dourados. Os dados foram coletados no interior de dois módulos de edificações sem vedação lateral, construídos em estrutura de madeira e cobertos com telhas de fibrocimento, sendo um localizado à sombra da árvore e outro ao sol.  Em cada modulo foram colocados um termômetro de globo negro e um psicrômetro e no exterior um anemômetro para registro da velocidade do vento. A partir dos dados coletados, foram calculadas as porcentagens de atenuação da temperatura do ar, umidade relativa e temperatura de globo negro para cada um dos módulos. Com os resultados obtidos e relacionados os módulos a sombra da árvore com o módulo ao sol foi encontrada uma atenuação da temperatura de globo negro de 3,46°C e temperatura do ar de 1,26°C com porcentagem de 9,62% e 3,96%, respectivamente.

  15. Aplicações de fibras vegetais na secagem de concretos refratários Use of natural fibers to speed up the drying step of refractory castables

    Directory of Open Access Journals (Sweden)

    C. S. Isaac

    2004-06-01

    Full Text Available A secagem de concretos refratários é uma etapa crítica em seu processamento devido aos riscos de explosão durante a saída de água contida em sua estrutura. Para minimizar esses problemas e aumentar a velocidade de secagem, fibras poliméricas têm sido adicionadas às formulações de concreto. Uma variável importante a ser considerada no desempenho desse aditivo é o tipo de fibra utilizada. Trabalhos do grupo de pesquisa indicaram que fibras vegetais podem apresentar bom desempenho na geração de canais permeáveis. Esse fato, aliado à sua grande disponibilidade e baixo custo, sugere que estas fibras sejam uma alternativa interessante às fibras sintéticas utilizadas atualmente. Neste trabalho, comparou-se o desempenho de fibras vegetais com o do polipropileno utilizados como aditivos de secagem. Foram realizadas medidas de permeabilidade utilizando a Equação de Forchheimer, ensaios de permeametria em alta temperatura e análise termogravimétrica do concreto. As fibras foram caracterizadas por calorimetria exploratória diferencial e termogravimetria.The drying of refractory castables is a critical step during application due to the possibility of spalling. In order to decrease these risks and improve the drying rate, polymeric fibers have been added to the castables' formulation. The type of fiber is an important aspect to be studied. Authors' previous works indicated that vegetable fibers can be good candidates. This fact, associated with its wide availability and low cost, suggests that these fibers can be interesting substitutes to synthetic ones. In this work, vegetable and polypropylene fibers had their performance evaluated as drying agents. The results of permeability measurements and hot air permeametry were related with the thermogravimety of the fiber-containing castables. The fibers were characterized by differential scanning calorimetry and thermogravimetry.

  16. Measuring naturally occurring uranium in soil and minerals by analysing the 352 keV gamma-ray peak of 214Pb using a NaI(Tl)-detector

    International Nuclear Information System (INIS)

    Bezuidenhout, J.

    2013-01-01

    This article investigates the prospect of utilising the 351.9 keV gamma-ray of 214 Pb when determining the concentration of uranium. Soil samples were collected from various locations around South Africa and laboratory gamma ray spectra for each were obtained by means of a NaI(Tl)-detector (7.62×7.62 cm 2 ). The potassium, uranium and thorium concentrations where extracted by analysing gamma ray peaks that are associated with these radionuclides. Two separate uranium concentrations were extracted; one by means of the 214 Pb decay and the other one by means of the 214 Bi decay. These uranium concentrations were compared in terms of accuracies and detection limits. - Highlights: • Investigated a method to improve uranium concentrations measurements. • Expansion on an existing method that analyses naturally occurring radionuclides. • Utilise pill containers opposed to Marrinelli beakers. • Possible application to in situ measurements. • The method utilise NaI(Tl)-detectors with relative high efficiency

  17. Critic to the science and technology activities in the CTPETRO, Brazil, natural gas sector (National Plan of Science end Technology of the Petroleum and Natural Gas Sector); Critica as atividades de C and T na area de gas natural do CTPETRO (Plano Nacional de Ciencia e Tecnologia do Setor de Petroleo e Gas Natural)

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Edmilson Moutinho dos; Faga, Murilo Tadeu Wenerck [Sao Paulo Univ., SP (Brazil). Inst. de Eletrotecnica e Energia. Grupo de Energia]. E-mails: edsantos@iee.usp.br; Poulallion, Paul; Correa Neto, Vicente [SINDE - Sinergia e Desenvolvimento S/C Ltda., Rio de Janeiro, RJ (Brazil)

    2002-07-01

    This paper performs an evaluation of the science and technology activities for the natural gas area at the CTPETRO - National Plan of Science and Technology for the Petroleum and Natural Gas Sector. The paper discuss the insufficiency of the present technological efforts in Brazil, aiming the increasing of the natural gas participation in the brazilian energy matrix. The work shows the great distance among those efforts and the national policy for the natural gas. Last, the paper discusses the necessity of a review in the science and technology activities in the gas sector, and makes some considerations on the great potential in the gas industry for employment generation, for new business and the increasing in the national competitiveness.

  18. IMPACTOS AMBIENTAIS DECORRENTES DE VAZAMENTO DE GÁS NATURAL DE BAIXA E MÉDIA PRESSÕES, NA ÁREA URBANA CENTRAL DO MUNICÍPIO DE SÃO PAULO

    OpenAIRE

    Moscardi, Jean Prost [UNESP; Araujo, Neide; Saad, Antônio Roberto

    2006-01-01

    Com a busca por fontes de energia alternativas, o gás natural vem adquirindo posicionamento de destaque por seu relativo baixo custo de aquisição ao consumidor final e por apresentar reduzidos impactos na implantação de dutovias, comparados com outras fontes de energia (hidroelétrica e fissão). O presente trabalho foi direcionado para a verificação de possíveis impactos oriundos de vazamentos em tubulações de gás em sua fase operacional. A área de estudo localiza-se no Município de São Paulo;...

  19. Entre Aldeia Kaingang ou Parque Natural: o processo de configuração de um conflito socioambiental na disputa pelo Morro do Osso, Porto Alegre, RS

    Directory of Open Access Journals (Sweden)

    Guilherme Fuhr

    2012-12-01

    Full Text Available This article describes the socio-environmental conflicts around the logics of occupation at Morro do Osso (Bone’s Hill in Porto Alegre, Brazil. Disputes involving different types of appropriation, use and significance of this area have been motivating actions of quite heterogeneous institutions and social organizations. Since the late 70’s, environmentalists who were concerned about the growing urbanization mobilized to ensure the hill’s preservation, a process that culminated on the creation of Morro do Osso Natural Park. Ten years later, in 2004, Kaingang indigenous people began to claim the demarcation of an indigenous land at Morro do Osso on an area that overlaps the Park. Thus, two territorialities emerged and began to polarize the conflict: on the one hand, those who favor maintaining the Morro do Osso Natural Park institutionalization; on the other hand, efforts for the Topë pën Kaingang’s land recognition and demarcation. Therefore, precisely the resulting tensions and implications of this polarization will be discussed here in order to bring out part of the discursive arena and the consequences of this territorial dispute, that, to date, has been demonstrating nothing dialogical and no prospect of consensus agreement between the parties involved, following a logic of “winners and losers” to the outcome of the dispute.

  20. Monetization non associated natural gas offshore reserve in the Espirito Santo Basin; Monetizacao de uma reserva 'offshore' de gas natural nao associado na Bacia do Espirito Santo

    Energy Technology Data Exchange (ETDEWEB)

    Kelman, Jose Ricardo; Barbosa, Leonardo Alcantara [BG Group, Rio de Janeiro, RJ (Brazil); Cintra, Marcos Antonio Lins da Costa [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Rio de Janeiro, RJ (Brazil); Brunet, Patricia Lima [Anadarko Exploracao e Producao Ltda., Rio de Janeiro, RJ (Brazil); Longo, Rafael Rodrigo [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This paper analyzes, from the perspective of a new player in the Brazilian market, the opportunities and the challenges to monetize a non-associated natural gas offshore resource, located in the Espirito Santo Basin. The fictitious exploration block 'BM-ES-07', located in shallow waters, near to the coast of Linhares, in Espirito Santo, was a hundred percent acquired, by an international independent oil and gas company during the fourth bid round of the ANP, occurred in 2002. With 10 (ten) billion cubic meters (m{sup 3}) of recoverable gas, the field will initiate its production in 2012, also producing condensate (C5+). The total investments are estimated (based in 2006 prices) in R$420 millions, including exploration, development and production costs. Considering the assumptions presented, the article describes the project development, presenting the economics results, and also discusses the alternatives for natural gas marketing. (author)

  1. Wood and natural gas as fuels for tunnel kilns in the clay-product industry; Serragem e gas natural como fontes energeticas em fornos tuneis na industria ceramica vermelha

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Gabriel M. dos; Bazzo, Edson; Nicolau, Vicente de P.; Oliveira, Amir A.M. [Santa Catarina Univ., Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica]. E-mails: mann@emc.ufsc.br; ebazzo@emc.ufsc.br; vicente@lmpt.ufsc.br; amirol@emc.ufsc.br

    2000-07-01

    The clay-product industry is responsible to large part of the thermal energy consumption, especially on drying and burning process. In spite of the success obtained with the burning of wood like principal fuel for tunnel kilns, the clay-product industries of Santa Catarina have looked for alternatives to substitute it. The interest appears especially due to imminent shortage of the wood on the market and due to possibility of use natural gas as a good and environmentally favorable alternative to reduce the energy specific consumption of the kilns, to increase the production and to improve the quality of the ceramic products. Nowadays, the natural gas is more expensive when compared with the wood. However, we believe that additional studies can place this fuel as a viable alternative to the clay-product industries. (author)

  2. The regulation in the unitization process in the petroleum and natural gas exploration in Brazil; A regulacao no processo de unitization na exploracao de petroleo e gas natural no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez, Felipe Alvite; Silva, Moises Espindola [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Engenharia de Petroleo; Bone, Rosemarie Broeker [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Engenharia de Producao

    2008-07-01

    This paper presents and analyses the unitization of exploration and production process of petroleum and natural gas in Brazil, focusing the regulatory aspects under the Petroleum Law 9478/97. Considering the deficiency and blanks of the existent regulation when referring the utilization, this work intends to present and discuss those non resolved points and, in concise way, to present international unitization cases, applying when possible, their resolutions to Brazil.

  3. Importância do etanol na atenuação natural de águas subterrâneas impactadas por gasolina Importance of ethanol on natural attenuation of groundwater impacted by gasohol

    Directory of Open Access Journals (Sweden)

    Cristina Cardoso Nunes

    2007-09-01

    Full Text Available Nesse estudo, foram avaliados os resultados de um experimento de derramamento controlado de gasolina brasileira em água subterrânea durante 6,5 anos de monitoramento. A exaustão do etanol, aos 32 meses de monitoramento, e a significativa redução de mais de 90% da massa máxima dos compostos BTEX dissolvidos no meio, aos 79 meses, associadas ao uso dos receptores de elétrons e acúmulo de seus subprodutos metabólicos, demonstraram a eficácia da atenuação natural monitorada para contaminações de águas subterrâneas sem riscos imediatos a receptores críticos. Constatou-se ainda que a biodegradação do etanol permitiu a formação de uma biobarreira natural que, após a sua completa degradação, acelerou a taxa de biodegradação dos BTEX e impediu o avanço da pluma destes contaminantes.In this study, results of 6.5 years of a controlled release experiment with Brazilian gasoline in groundwater were evaluated. Ethanol exhaustion after 32 months and the significant dissolved BTEX mass reduction of more than 90% after 79 months, associated with the electron acceptors use and their metabolic byproducts accumulation, demonstrated the efficiency of monitored natural attenuation for groundwater contamination without immediate risk to receptors. Moreover, ethanol degradation provided a natural biobarrier formation that increased BTEX biodegradation rate and prevented the BTEX plume expansion.

  4. Considerations of an environmental insurance compulsory in the industry of petroleum and natural gas; Consideracoes acerca de um seguro ambiental obrigatorio na industria do petroleo e do gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Diniz, Luiz Paulo dos Santos; Medeiros, Mueller Eduardo Dantas de [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Brasilia, DF (Brazil). Programa de Recursos Humanos em Direito do Petroleo, Gas Natural e Biocombustiveis

    2009-08-15

    With the flexibilizing of the monopoly activities related to oil and natural gas, introduced by Constitutional Amendment No. 9 / 1995 and Law No. 9.478/1997, other companies were introduced in the sector besides PETROBRAS, resulting in a bulky input of resources. It is estimated that the investments made by players in this market should reach a value of one hundred billion dollars by 2011, covering the purchase of equipment and services in Brazil and abroad. This picture of the industry expansion has generated significant impacts on the economy in general and in particular to the insurance industry. And the reason is simple. The new players in this market were not aware of the reality they faced. Nothing more natural, therefore, seek to protect their investment through insurance. Such openness has created a demand for insurance increasingly complex, covering not only the damage caused by the malfunction in the machinery business. Brazilian insurers sought to adapt to meet this new demand, seeking to adjust to international market standards. In recent years there have been some accidents in the industry of oil and natural gas. The consequence is a distortion in the insurance market caused by the insufficient volume of premiums to cover the damage resulting from these claims. The environment certainly is a very delicate and vulnerable position, given the magnitude of the damage they may suffer as a result of the activities of oil companies and natural gas. The figure comes from insurance, as well as a possible mechanism to achieve the intent of protecting the environment. In Congress, transact the Law Project that deal with the establishment of a environment insurance for companies. On them will be made some considerations.

  5. Urban index modelling for forecasting of channeled natural gas market: an example in Sao Paulo metropolitan region; Modelagem de indicadores urbanos para previsao do mercado de gas natural canalizado: um exemplo na regiao metropolitana de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Massara, Vanessa Meloni; Faga, Murilo Tadeu Werneck; Udaeta, Miguel Edgar Morales [Universidade Sao Paulo (USP), SP (Brazil). Programa Interunidades de Pos Graduacao em Energia]. E-mail: vmassara@iee.usp.br; murfaga@iee.usp.br; udaeta@pea.usp.br

    2006-07-01

    This paper aims to present a systemic model for analysis of the expansion and grow up of the natural gas distribution pipeline in a city. This methodology integrates the understanding of the urban dynamics to the strategies of expansion in the natural gas distribution network, through the grouping of information such as family income, demographic density and construction area, percentage of land use, number of households as well as commercial, service and industrial establishments, number of real state as well as indicative information released by the Urban Plan of the city regarding the increments in the peripheral districts. Relating the gas consumption esteemed by each type of land occupation and the cost for expanding the gas distribution network, the model will indicate, for each neighborhood, the viability of implementing a gas network as well as the places with potential for growing density in the existing gas distribution system. The aim is to propose an integration of aspects of city dynamics and new energy source development, taking the advance of natural gas in Sao Paulo Metropolitan area as a specific case study. Through the analysis of highly industrialized, residential and commercial suburbs of the City of Sao Caetano do Sul, the importance of urban parameters in the decision making process for network expansion is identified. (author)

  6. The legal discipline of government participation in recent oil and natural gas industry in Brazil; A disciplina juridica das participacoes governamentais na hodierna industria brasileira de petroleo e gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Serafim, Fabrizia Pessoa

    2010-07-01

    This study analyzes the legal discipline of government participation in today's oil and natural gas industry in Brazil, taking as an object of study financial compensation under Law 9.478/97 and those under discussion in Congress as part of the new regulatory framework for areas the pre-salt and other strategic areas. The primary goal of the work is to disseminate knowledge about the government take as a way to facilitate popular control (public governance) in an extremely central to the modern world. (author)

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2004-07-01

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

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2004-07-01

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

  9. Impacts of fuel oil substitution by natural gas in a pipeline network scheduling; Impactos da substituicao do oleo combustivel por gas natural na programacao de uma rede de dutos

    Energy Technology Data Exchange (ETDEWEB)

    Souza Filho, Erito M.; Bahiense, Laura; Ferreira Filho, Virgilio J.M. [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil)

    2012-07-01

    In recent decades, due to the advancement and computational methods for solving optimization problems, the number of articles addressing the scheduling of products has grown. The mathematical models developed have proved useful to schedule from a single pipeline with multiple products to complex networks of multiple pipelines. Moreover, the planning of these activities is of even greater importance when considering the existence of new environmental requirements to be applied to production and marketing of petroleum products. An example of this paradigm shift is the reduction in fuel oil consumption due to increased share of natural gas in the Brazilian energy matrix. In this context, this paper proposes a mathematical model to obtain feasible solutions for problems of scheduling a network of pipelines considering replacing all or part of the demand for fuel oil to natural gas. We tested the model on three real instances of a multi commodity network consists of 4 terminals, 4 refineries and 8 unidirectional pipelines, considering a planning horizon of one week. (author)

  10. Natural gas conversion program of Rio de Janeiro-Brazil; Projeto de conversao do sistema de distribuicao de gas canalizado na cidade do Rio de Janeiro

    Energy Technology Data Exchange (ETDEWEB)

    Pallottino, J.T.; Costa Filho, M.A.F.; Guarana, L.F.M.L. [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil); Margalef, J.M. [Companhia Estadual de Gas (CEG), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This paper presents the Conversion Project of Rio de Janeiro, Brazil, that converted all customers and the distribution network from Manufactured Gas (MG) to Natural Gas (NG), evaluating its logistic and benefits, highlighting those related to consumer safety. The Conversion Project was executed under the responsibility of CEG with the support of UERJ, specially on the definition and revision of the technical procedures as well as the quality assurance of the project execution. As main advantages followed by MG to NG network conversion, we can note: increasing of gas distribution network capacity and gas network operational condition improvements; elimination of production plant; revision and renovation of gas network; revision and repairing of building gas facilities; augmenting of NG usage; elimination of carbon monoxide as a supplied gas constituent. Conservation condition of most consumer internal gas facilities and ambient ventilation were so critical that conversion program resulted in no measurable accident prevention. The achieved safety level should be maintained through a periodically re-evaluation program of customer's gas facilities and appliances, with special focus on permanent ventilation required for NG safety usage. (author)

  11. Restoration in the mixed Ombrophilous Forest throught the natural succession Restauração na Floresta Ombrófila Mista através da sucessão natural

    Directory of Open Access Journals (Sweden)

    Ademir Reis

    2010-06-01

    biodiversidade e resiliência
    na área degradada, mantendo uma estabilidade dinâmica.

  12. Comparação de diferentes abordagens para avaliação da incerteza na cromatografia gasosa do gás natural Comparison of different approaches to evaluate the uncertainty of gas chromatography for natural gas

    Directory of Open Access Journals (Sweden)

    Elcio Cruz de Oliveira

    2009-01-01

    Full Text Available The evaluation of uncertainty associated with an analytic result is an essential part of the measurement process. Recently, several approaches to evaluate the uncertainty in measurement have been developed. Here, the gas chromatography assay uncertainty for natural gas is compared by some of these approaches: the guide to the expression of uncertainty in measurement (GUM approach, top-down approach (reproducibility estimate from an inter-laboratory study, Barwick & Ellison (data from validation, study of variability and fuzzy approach. The comparison shows that GUM, Barwick & Ellison and fuzzy approaches lead to comparable uncertainty evaluations, which does not happen with the top-down approach and study of variability by the absence of data normality.

  13. Computational simulation of natural circulation and rewetting experiments using the TRAC/PF1 code; Simulacao computacional dos experimentos: circulacao natural no CTE-150 e remolhamento na ITR utilizando o TRAC-PF1

    Energy Technology Data Exchange (ETDEWEB)

    Silva, J.D. da

    1994-05-01

    In this work the TRAC code was used to simulate experiments of natural circulation performed in the first Brazilian integral test facility at (COPESP), Sao Paulo and a rewetting experiment in a single tube test section carried out at CDTN, Belo Horizonte, Brazil. In the first simulation the loop behavior in two transient conditions with different thermal power, namely 20 k W and 120 k W, was verified in the second one the quench front propagation, the liquid mass collected in the carry over measuring tube and the wall temperature at different elevations during the flooding experiment was measured. A comparative analysis, for code consistency, shows a good agreement between the code results and experimental data, except for the quench from velocity. (author). 15 refs, 19 figs, 12 tabs.

  14. A incorporação das rotas turísticas, como complemento ao turismo religioso e ao marketing mix – 4P’s, dos hotéis localizados em Fátima e o impacto na satisfação dos turistas portugueses e estrangeiros: o caso de hotéis de 4 e 3 estrelas

    OpenAIRE

    Santos, Marisa Raquel Ribeiro

    2017-01-01

    O Turismo exerce influências económicas, sociais e culturais, sendo cada vez mais evidente as proporções deste fenómeno, tanto nos locais turísticos como nas unidades hoteleiras que acolhem os turistas. De facto, esta relação é notória na cidade de Fátima, onde o Turismo Religioso apresenta uma maior influência. Tendo em consideração que os turistas tendem a conhecer novas regiões e novas ofertas, é crucial que existam sinergias entre os locais turísticos e os hotéis. Assim, os hotéis deverão...

  15. Synergic effect of gamma radiation with thermal treatment for conserving natural apple juice from Gala variety; Efeito sinergistico da radiacao gama com tratamento termico na conservacao de suco natural de maca da variedade Gala

    Energy Technology Data Exchange (ETDEWEB)

    Blumer, L.; Domarco, R.E.; Spoto, M.H.F.; Walder, J.M.M.; Matraia, C. [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil)

    1995-12-31

    This paper aims at the feasibility of a new method for conserving natural apple juice using no chemicals. The apple juice was extract from Gala apple variety and was bottled in sterile 100 ml amber vials. The samples were treated by: heat at 60{sup 0} C for 20 minutes; heat at 80{sup 0} C for 20 minutes; radiation; radiation plus heat (60{sup 0}); radiation plus heat 80{sup 0} C. The radiation doses were 0,2,4 and 6 kGy at the dose rate of 1.6 kGy/h. The juice quality control was carried out by chemical analysis (total soluble solids, pH, acidity, ascorbic acid) following the AOAC methodology. The samples were stored under refrigeration conditions 5{+-}3{sup 0} C up to 180 days. It was observed an alteration of the total soluble solids and the pH during the storage period for all treatments. The pH was also affected by the combined treatments (radiation plus heat). The acidity was affected by the interaction of storage period and heat temperature. The ascorbic acid was affected by the synergic effect of heat and radiation and by the interaction radiation and storage period. (author). 8 refs, 6 figs.

  16. Parâmetros nutricionais da pastagem natural em diferentes tipos de solos na APA do Ibirapuitã, Rio Grande do Sul - Brasil Nutritional parameters of natural pasture in different soils at APA of Ibirapuitã, Rio Grande do Sul - Brazil

    Directory of Open Access Journals (Sweden)

    Vicente Celestino Pires Silveira

    2006-12-01

    Full Text Available O desempenho de ruminantes domésticos é influenciado por fatores intrínsecos ao animal, ao alimento e pela interação entre animal e alimento. O trabalho foi realizado na Estância do 28, pertencente à Fundação Maronna, Alegrete - RS, dentro da APA do Ibirapuitã. Para representar o fator solo, foram escolhidos os três tipos predominantes da APA do Ibirapuitã: Basalto Superficial, Basalto Profundo e Arenito. As amostras da pastagem natural foram retiradas por simulação de pastejo, através de coleta manual. Os parâmetros nutricionais avaliados foram: proteína bruta, fibra em detergente neutro e taxa de degradação da matéria seca. A forragem da pastagem natural oriunda do solo Basalto Superficial apresentou diferença significativa (PIntrinsic animal and food factors and the interaction between them influence the performance of domestic ruminants. This study was done at Estância do 28, property of the Maronna Foundation, Alegrete - RS, inside the Ibirapuitã Area of Environmental Protection. In order to represent soil as a factor, the three main soil types were chosen: Superficial Basalt, Deep Basalt and Sandy. Hand plucking methods were used to obtain samples of natural pasture. Nutritional parameters considered were crude protein, neutral detergent fiber and dry matter degradation rate. The forage from natural pasture of the Superficial Basalt presented significant difference (P<0.05 in crude protein rates over the other two types of soil, which did not differ amongst themselves. The highest rate of neutral detergent fibre (84.54% was obtained in pasture originated from Sandy soil, in relation to Superficial and Deep Basalt, with values of 74.53% and 77.98%, respectively. There was also a significant difference in the degradation rate of dry matter (P<0.05. Sandy soil pasture presented an intermediate degradation value (3.61% h-1, not differing from other soils. The forage from natural pastures present similar degradation rates

  17. Evaluation of natural radioactivity in some granitic rocks in the state of Parana, Brazil and its use in civil construction; Avaliacao da radioatividade natural em algumas rochas graniticas do estado do Parana e sua utilizacao na construcao civil

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Ademar de Oliveira

    2013-07-01

    Primordial, or terrestrial natural radionuclides, are found in different amounts in the environment. In dwellings, an important dose increment is due to building materials, which contribute for both the external gamma dose from the radionuclides of the {sup 238}U, {sup 235}U and {sup 232}Th series and the natural {sup 40}K and the internal dose, due mainly to {sup 222}Rn inhalation. Once granitic rocks are widely used both as construction materials or structural flooring, those rocks can become an important dose source, depending on the content of concentrations of radioactivity, and the construction application. In this work, a database for granitic rocks of the crystalline shield of Parana (mainly in the Metropolitan Region of Curitiba, RMC), used in civil construction, was generated, evaluating in terms of radiological protection the external and internal dose increments, caused by the use of these materials. Also, possible correlations between the {sup 226}Ra activity concentration, the {sup 222}Rn exhalation rate, density, porosity and chemical composition (oxide content) in these samples had been studied. The external dose was assessed by gamma-ray spectrometry with High-Purity Germanium detectors, where the activity concentration of the radionuclides {sup 232}Th, {sup 226}Ra and {sup 40}K are the parameters used in dosimetric models (Dosimetric Indexes), which established limits in accordance with the form, amount and application of material of construction. For the calculation of the annual effective external dose it was assumed a room model with dimensions of 4 m x 5 m x 2:8 m and all walls internally covered with 2 cm thickness of granite and an annual exposure time of 7000 h as suggested by the European Commission of Radiological Protection for internal superficial coating materials. The internal exposure was assessed from the radon concentration in the air of the room model, simulated from the superficial exhalation rate of {sup 222}Rn. The exhalation

  18. Influência da adubação fosfatada e da introdução de espécies forrageiras de inverno na oferta de forragem de pastagem natural Influence of phosphorus fertilization and introduction of winter forage species on forage offer from natural pasture

    Directory of Open Access Journals (Sweden)

    LUCIANO COLPO GATIBONI

    2000-08-01

    Full Text Available A pecuária de corte no Estado do Rio Grande do Sul é baseada na utilização de pastagens naturais, que são de baixa produtividade e sazonalidade de produção. O objetivo deste trabalho foi testar o efeito de diferentes fosfatos, solúveis e natural, associados ou não à calagem, no melhoramento de pastagem natural pela introdução de espécies forrageiras de inverno. O estudo foi conduzido na Universidade Federal de Santa Maria, em solo Argissolo Vermelho. Os tratamentos foram: foscal (superfosfato simples + calcário; superfosfato triplo + calcário; superfosfato triplo; hiperfosfato de gafsa; sem adubação fosfatada e sem calcário; testemunha de pastagem natural. Com exceção do último, todos os tratamentos receberam adubação potássica, nitrogenada e introdução de Lolium multiflorum e Trifolium vesiculosum. Foram aplicados nos tratamentos específicos 3,2 Mg ha-1 de calcário (elevação do pH-H2O a 5,5, 180 kg ha-1 de P2O5, 130 kg ha-1 de K2O e 70 kg ha-1 de N. A produtividade de matéria seca foi avaliada nos períodos do inverno, primavera, primavera-verão e verão-outono. A adubação fosfatada aumentou significativamente a produtividade de matéria seca da pastagem. Os fosfatos solúveis proporcionaram maiores produções que o fosfato natural. A calagem não aumentou a produtividade de Lolium multiflorum e da pastagem natural, mas o Trifolium vesiculosum apresentou resposta a este insumo.The beef cattle production in Rio Grande do Sul, Brazil, is based on natural pasture grazing, which are of low productivity and seasonal growth. The present work was done to test the effects of Italian ryegrass and arrowleaf clover introduction in natural pasture under different phosphorus fertilizer, soluble and natural, associated or not to the lime, on forage improvement from natural pasture. The study was conducted at Universidade Federal de Santa Maria on a Paleudalf. The treatments were: foscal (simple superphosphate + lime; triple

  19. Radiation protection program applied to occupationally exposed individuals at the IPEN/CNEN-SP pilot plant in the 1980s for natural uranium compounds; Programa de radioproteção aplicado aos indivíduos ocupacionalmente expostos na usina piloto do IPEN-CNEN/SP na década de 80 para compostos de urânio natural

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Teresinha de Moraes da; Sordi, Gian Maria A.A.; Vasques, Francisco Mário Feijó, E-mail: tmsilva@ipen.br [Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), São Paulo, SP (Brazil)

    2017-07-01

    The work evidences the chemical processing of natural uranium from the yellowcake phase to the production of UF{sub 6} natural uranium hexafluoride, a process carried out at the IPEN/CNEN-SP pilot plant. Radiation protection management was intended to monitor occupationally exposed individuals - IOEs, the workplace and the environment. An individual monitoring program for IOEs was developed for both external irradiation and incorporation of radioactive material. The IOEs were monitored externally with film-type dosimeters and the in vitro method was applied internally for urine analysis. For the workplace the monitoring program for equipment and floors was developed, determining the exposure rate from the process equipment, surface contamination expressed in Bq.cm{sup -2} in equipment and floors, complemented by the air monitoring program both for the worker as well as for the workplace. Cellulose filters with aerodynamic diameter of 0.3 micron to 8.0 micron were used.

  20. Analysis of private natural heritage reserves as a conservation strategy for the biodiversity of the cocoa region of the southern State of Bahia, Brazil Análise das reservas particulares do patrimônio natural como estratégia de conservação na região cacaueira do Sul da Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Alexandre Schiavetti

    2010-08-01

    Full Text Available Brazil was the first country in Latin America to establish and regulate this type of reserve, and there are currently more than 700 Private Nature Heritage Reserves (RPPN in Portuguese officially recognized by either federal or state environmental agencies. Together, these RPPN protect more than a half million hectares of land in the country. The coastal forests in the southern part of Bahia State extend 100 to 200 km inland, gradually changing in physiognomy as they occupy the dryer inland areas. The coastal forest has been subjected to intense deforestation, and currently occupies less than 10% of its original area. For this work the creation processes of the RPPN were consulted to obtain the data creation time, size of property, the condition of the remaining forest, succession chain and the last paid tax. After that, interviews with the owners were made to confirm this data. Sixteen RPPN have been established in this region until 2005. Their sizes vary from 4.7 to 800 ha. Ten of these RPPN are located within state or federal conservation areas or their buffer zones. In spite of the numerous national and international conservation strategies and environmental policies focused on the region, the present situation of the cocoa zone is threatening the conservation of the region's natural resources. The establishment of private reserves in the cocoa region could conceivably improve these conservation efforts. This type of reserve can be established under a uniform system supported by federal legislation, and could count on private organizations.O Brasil foi o primeiro País na América Latina a estabelecer e regulamentar este tipo de reserva e hoje, há mais de 700 Reservas Particulares do Patrimônio Natural (RPPN oficialmente reconhecidas pelos órgãos ambientais federais ou estaduais. Juntos, estas reservas protegem mais de meio milhão de hectares em diferentes biomas dos Pais. A Floresta Atlântica na região Sul da Bahia se estende at

  1. Natural products use for protection of seedling in planting trees Uso de produtos naturais para proteção de mudas na arborização de pastagens

    Directory of Open Access Journals (Sweden)

    Valéria Cristina Zago

    2008-04-01

    Full Text Available Conventional productive systems have depleted environmental resources and weakened unsustainable agroecosystems. Silvopastoral systems can be a viable alternative for the recovery of degraded areas. The objective of this experiment was to evaluate natural products used to protect seedlings in planting trees in pastures which the cattle is permanently grazing and the seedlings have no mechanical restraint to keep the cattle away. The experiment was conducted at “Embrapa Gado de Corte”, Mato Grosso do Sul State, Brazil, from February 2nd 2005 to March 28th 2005. The statistical design employed was the split-plot random design, with ten replications. The following treatments were given to the plots: 1 cattle manure around the tree seedlings; 2 dried bovine blood; 3 crushed egg shells; and 4 no protection (control. The subplots contained five tree species: Myroxylon peruiferum (Bálsamo, Dipteryx alata (Cumbaru, Schizolobium parahyba (Guapuruvu, Genipa americana (Jenipapo and Mimosa caesalpineaefolia (Sansão do campo. Herbivory was intense for all treatments. The survival rate of S. parahyba was 72.5%, and 100% of M. caesalpineafolia died. Cattle manure produced the best results, with partial protection of tree seedlings. Application of egg or blood did not offer any protection to the young trees. The concentration and frequency of application of manure for seedling protection deserves further attention.Os sistemas de produção convencional têm esgotado os recursos ambientais, o que torna o agroecossistema frágil e insustentável. Sistemas silvipastoris podem ser alternativas viáveis na recuperação de pastagens degradadas. Este estudo foi desenvolvido com o objetivo de avaliar produtos naturais na implantação de espécies arbóreas em pastagens com presença constante de bovinos, sem proteção das mudas. O experimento foi conduzido na Embrapa Gado de Corte, Campo Grande, MS, no período de 02/02/2005 a 28/03/2005. O delineamento

  2. SELETIVIDADE DE INSETICIDAS AO COMPLEXO DE INIMIGOS NATURAIS NA CULTURA DO ALGODÃO (Gossypium hirsutum L. SELECTIVITY OF INSECTICIDES ON THE COMPLEX OF NATURAL ENEMIES IN COTTON CROP (Gossypium hirsutum L.

    Directory of Open Access Journals (Sweden)

    Fábio Shigeo Takatsuka

    2007-09-01

    Full Text Available

    Avaliou-se a seletividade de inseticidas sobre o complexo de inimigos naturais na cultura do algodão (Gossypium hirsutum L., no município de Goiânia, GO. Utilizou-se a cultivar Deltapine e o delineamento experimental em blocos ao acaso, com sete tratamentos e quatro repetições. Os tratamentos foram: testemunha, thiamethoxam (300 g.ha-1, lufenuron (300 mL.ha-1, betacyflutrin (800 mL.ha-1, imidacloprid (70 g.ha-1, diflubenzuron (6,0 g.ha-1, endosulfan (1500 mL.ha-1, em suas apresentações comerciais. A pulverização dos inseticidas foi efetuada aos 45 dias após a emergência das plantas. Além da avaliação prévia, foram efetuadas avaliações aos três e sete dias após a aplicação dos inseticidas. As amostragens foram realizadas através do método de batida de pano, com duas batidas ao acaso por parcela, identificando-se e contando-se, o número de inimigos naturais presentes. Três dias após a aplicação dos tratamentos, os inseticidas thiamethoxam (300 g.ha-1, lufenuron (300 mL.ha-1 e diflubenzuron (60 g.ha-1, considerando os produtos comerciais, não apresentaram efeito de choque sobre o complexo de inimigos naturais presentes na cultura do algodoeiro. Entretanto, aos sete dias após a aplicação, apenas o tratamento com lufenuron manteve a seletividade.a esses artrópodes predadores.

    PALAVRAS-CHAVE: Inseticida; controle biológico; Gossypium.

  3. Silicene for Na-ion battery applications

    KAUST Repository

    Zhu, Jiajie

    2016-08-19

    Na-ion batteries are promising candidates to replace Li-ion batteries in large scale applications because of the advantages in natural abundance and cost of Na. Silicene has potential as the anode in Li-ion batteries but so far has not received attention with respect to Na-ion batteries. In this context, freestanding silicene, a graphene-silicene-graphene heterostructure, and a graphene-silicene superlattice are investigated for possible application in Na-ion batteries, using first-principles calculations. The calculated Na capacities of 954mAh/g for freestanding silicene and 730mAh/g for the graphenesilicene superlattice (10% biaxial tensile strain) are highly competitive and potentials of >0.3 V against the Na/Na potential exceed the corresponding value of graphite. In addition, the diffusion barriers are predicted to be <0.3 eV.

  4. O EFEITO DO MÉTODO DE PILATES NA PREVENÇÃO DE LESÕES EM BAILARINOS

    Directory of Open Access Journals (Sweden)

    S. Fernandes

    2015-04-01

    Full Text Available A Dança potencia a ocorrência de lesões (Meereis, Favretto, Bernardi, Peroni, & Mota, 2011, sendo mais frequentes no membro inferior (Rietveld, 2013. O centro é o ponto-chave do Método de Pilates e refere-se à sinergia muscular estabelecida entre os músculos Transverso Abdominal, Oblíquos Interno e Externo e o Multifidus. A sua estabilidade aumenta a performance, previne lesões e alivia a dor lombar. Existe uma relação entre a diminuição da estabilidade do centro e uma maior incidência de lesões do membro inferior. Existem poucos estudos que avaliem o centro em bailarinos (Rickman et al., 2012.O Método de Pilates é um exercício corpo-mente que requer estabilidade do centro dando atenção ao controlo muscular, postura e respiração (Wells, Kolt, & Bialocerkowski, 2012, o que contribui para um melhor alinhamento corporal (Cruz-Ferreira et al., 2011, e para a prevenção de lesões (Massey, 2011. Os estudos existentes em bailarinos concluíram que melhora o alinhamento corporal (Kuo et al. 2009 e previne lesões (McMillan et al., 1998. Objetivo: Determinar os efeitos de um programa do método de Pilates na estabilidade do centro, no alinhamento postural e na dor, na prevenção de lesões no membro inferior em bailarinos.

  5. Silicene for Na-ion battery applications

    KAUST Repository

    Zhu, Jiajie; Schwingenschlö gl, Udo

    2016-01-01

    Na-ion batteries are promising candidates to replace Li-ion batteries in large scale applications because of the advantages in natural abundance and cost of Na. Silicene has potential as the anode in Li-ion batteries but so far has not received

  6. Topics to study the integrated use of natural gas in the electricity with industrial focus: a methodology for optimizing its use with application in the Vale do Paraiba region (SP-Brazil); Topicos para o estudo da utilizacao integrada do gas natural na eletricidade com enfoque industrial: uma metodologia para otimizacao de seu aproveitamento com aplicacao na regiao do Vale do Paraiba

    Energy Technology Data Exchange (ETDEWEB)

    Paro, Andre C.; Borelli, Samuel J.S. [PROMON Engenharia SA, Sao Paulo, SP (Brazil); Santos, Edmilson M. [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia; Fadigas, Eliane A. [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica

    2004-07-01

    After the recent announcement on the discovery of a large amount of Natural Gas (NG) in the Santos Field by PETROBRAS, use incentive policies for its consumption and consequent growth participation in the national energy matrix gained strength This paper intends to present an efficient use optimization methodology for the NG integrated to Electricity with focus on it's industrial use under the concepts of Integrated Resources Planning (IRP). Thus, the topics about NG utilization in cogeneration plants are analyzed, showing it's utilization on Electric Energy (EE) and Process Heat (Steam) supply. Its contribution to the distributed Electric Energy generation, which brings the installed generation power closer to the consumer centers and mitigates energy transmission losses, are also presented. The IRP concept is applied on the integration between industrial use and other uses of NG and on the detailing of its influence on the electric sector. Finally, a case study is presented, applying the presented methodology for the use of NG in the industry of 'Vale do Paraiba' Region (SP-Brazil), due to its industrial economy condition and easy access to the Brazilian proved reserves geographic condition. (author)

  7. Načrtovan porod na domu

    OpenAIRE

    Todorović, Tamara; Takač, Iztok

    2017-01-01

    Izhodišča: Porod na domu je sicer star toliko kot človeštvo, pa vendar v veliki večini srednje in visoko razvitih držav prevladuje mnenje, da so zaradi nepredvidljivosti zapletov porodnišnice najbolj varno okolje za rojevanje. Kljub temu obstaja peščica držav, v katerih je porod na domu integriran v sistem zdravstvenega varstva (npr. Nizozemska, Velika Britanija, Kanada). Pri porodih na domu ločimo nenačrtovane in načrtovane porode na domu, slednje pa lahko nadalje razdelimo še na porode s sp...

  8. Efeito do composto "mais vida" na ativação de macrófagos de ratos diabéticos Effects of "mais vida", a commercial natural mix, on the activation of macrophages from diabetic rats

    Directory of Open Access Journals (Sweden)

    E.L. França

    2012-01-01

    Full Text Available O objetivo deste trabalho foi avaliar a atividade funcional de macrófagos de ratos diabéticos, através da liberação do ânion superóxido, na presença do composto "mais vida". Os animais foram divididos em dois grupos, controle (N=20 e diabético (N=20. Avaliou-se a glicemia, massa corpórea e a liberação de superóxido pelos macrófagos de baço de ratos. O composto "mais vida" foi obtido através da mistura de extratos de sete plantas, sendo Orbignia martiana Rodr., Tabebuia avellanedae L.G., Arctium lappa L., Rosa centifolia L., Maytenus ilicifolia Mart., Vernonia condensata Baker e Thuja occidentalis L. Observou-se que glicemia foi maior no grupo diabético. A liberação espontânea do ânion superóxido pelos macrófagos foi menor no grupo diabético. O composto "mais vida", independente dos níveis glicêmicos, aumentou a liberação de superóxido dos macrófagos. Quando as células foram estimuladas pelos extratos vegetais isolados, também houve aumento na liberação do ânion superóxido pelos macrófagos em ambos os grupos. As maiores liberações de superóxido ocorreram quando os macrófagos foram estimulados pela Thuja occidentalis L., Rosa centifolia L., Tabebuia avellanedae L.G. e Maytenus ilicifolia Mart. Estes dados sugerem que a ativação de macrófagos pelo composto "mais vida" pode representar um mecanismo alternativo de defesa para infecções em indivíduos diabéticos.This study investigated the effects of "mais vida", a commercial natural mix, on macrophages functional activity as evaluated by the superoxide release in diabetic rats. The animals were divided into two groups, control (N = 20 and diabetic (N = 20. This was achieved by determining blood glucose weight and the superoxide released by spleen macrophages. The "mais vida" mix was obtained by the combination of extracts from seven medicinal species, which were: Orbignia martiana Rodr., Tabebuia avellanedae L.G., Arctium lappa L., Rosa centifolia L

  9. DETERMINAÇÃO DO POTENCIAL NATURAL À EROSÃO LAMINAR NA BACIA DO RIO JACARÉ GUAÇÚ (SP - DETERMINATION OF NATURAL POTENTIAL FOR SOIL EROSION IN JACARÉ GUAÇÚ STREAM BASIN (SÃO PAULO STATE - BRAZIL

    Directory of Open Access Journals (Sweden)

    Vladimir Souza

    2017-04-01

    Full Text Available Este trabalho tem como objetivo determinar o potencial natural à erosão (PNE na bacia do rio Jacaré Guaçú (SP com base nos fatores físicos da Equação Universal de Perdas de Solos (EUPS. Dados pedológicos, de precipitação pluviométrica e de Sensoriamento Remoto foram usados para determinar as variáveis naturais do referido modelo, ou seja, erosividade das chuvas (fator R, erodibilidade dos solos (fator K, comprimento de rampa (fator L e declividade do terreno (fator S. Técnicas de Geoprocessamento desenvolvidas em Sistema de Informação Geográfica (SIG foram utilizadas para a estruturação e execução do modelo ambiental. Os resultados demonstram que o fator R da área de estudo varia entre 6392 e 8015 MJ.ha.mm-1.h-1.ano-1, o fator K está compreendido entre 0,0097 e 0,610 t.ha-1.MJ-1.mm-1 e o fator topográfico (LS predominante é menor que 4. Em relação ao PNE, dentre as classes definidas, destacam-se os locais classificados com alto, muito baixo, extremamente alto e muito alto potencial, com representatividade em mais de 90% da área de estudo. Os locais com PNE médio e baixo ocupam menos de 10% da bacia hidrográfica. Os resultados obtidos podem auxiliar no ordenamento territorial da área de estudo, sobretudo no que diz respeito ao gerenciamento e expansão das atividades agropecuárias. ABSTRACT This paper aims to determine the natural erosion potential in Jacaré Guaçú stream basin (São Paulo State - Brazil based in the physical factors of Universal Loss Soil Equation (ULSE. Pedological, rainfall and Remote Sensing data were used to define the natural variables of model, that is, rainfall erosivity (R factor, soil erodibility (K factor and topography (LS factor. Geoprocessing techniques developed in Geographic Information System (GIS were used to structure and execute the environmental model allowing determining areas with higher erosion risk. The results show that the areas classified as high, very low, extremely

  10. Avaliação da diversidade alfa de Passalidae (Coleoptera: Scarabaeoidea na Amazônia Colombiana (Parque Nacional Natural La Paya, Putumayo Alpha diversity assessment of Passalidae (Coleoptera: Scarabaeoidea in the Colombian Amazon (La Paya National Natural Park, Putumayo

    Directory of Open Access Journals (Sweden)

    Larry Jiménez-Ferbansi

    2011-01-01

    Full Text Available Este trabalho apresenta um inventário da fauna de Passalidae da região sudeste do Parque Nacional Natural La Paya, sendo a primeira coleta deste grupo de insetos para o Estado colombiano de Putumayo. As coletas, de indivíduos adultos, foram feitas durante os dias 9 a 16 de fevereiro de 2008, em percursos livres, nos quais foram revisados 80 troncos em decomposição. A porcentagem de troncos colonizados por passalídeos foi de 40%, nos quais foram coletados 225 indivíduos pertencentes a duas tribos, quatro gêneros e 16 espécies, representando entre 73-96% da riqueza estimada por curvas de acumulação de espécies. A tribo com maior riqueza foi Passalini, enquanto o gênero com maior diversidade foi Passalus Fabricius, 1792 com 12 espécies. A diversidade local do grupo estudado é alta, em comparação a outros registros obtidos na região neotropical.It is presented an inventory of the Passalidae fauna from Southeastern National Natural Park La Paya, Colombia. This corresponds to the first survey of this family for the Putumayo region. The collections were conducted from February 9-16th 2008, along forest tracks, assessing a total of 80 decaying logs. In general, 40% of the logs were colonized by passalids. The 225 individuals collected belong to two tribes, four genera and 16 species, which represent between 73 to 96% of the richness estimated by species accumulation curves. The tribe with the greatest richness was Passalini, while the most diverse genus was Passalus Fabricius, 1792 with 12 species. The local diversity of the study area is among the highest when compared to other Neotropical areas.

  11. Monitoring of effects of land subsidence at Ameland-Oost, Netherlands. Evaluation after 18 years of natural gas exploration. Summary; Monitoring effecten van bodemdaling op Ameland-Oost. Evaluatie na 18 jaar gaswinning. Samenvatting

    Energy Technology Data Exchange (ETDEWEB)

    Eysink, W.D.; Wang, Z. [Waterloopkundig Laboratorium WL - Delft Hydraulics, Delft (Netherlands); Dijkema, K.S.; Slim, P.A.; Dankers, N.M.J.A.; Sanders, M.E.; Van Dobben, H.F. [ALTERRA, Wageningen (Netherlands); Krol, J.; Kersten, M.; Molenaar, W. [Natuurcentrum Ameland, Nes (Netherlands); Doornhof, D.; Schoustra, S.; Veldwisch, W. [Nederlandse Aardolie Maatschappij NAM, Assen (Netherlands)

    2005-05-15

    After the start of the natural gas exploitation on the Dutch island Ameland in 1986 surveys were carried out from 1988 on to investigate and monitor the effect of the exploitation on land subsidence and related environmental effects. In this third report evaluated results of that survey over the last 18 years are presented and discussed. [Dutch] De gaswinning op Ameland-Oost is begonnen in 1986. In dat zelfde jaar werd in opdracht van de NAM door WL|Delft Hydraulics in samenwerking met Alterra (toen RIN) een voorspelling gemaakt van de mogelijke effecten van de bodemdaling, waarna eind 1988 is begonnen met de monitoring. De eerste twee rapportages zijn gebaseerd op gegevens tot 1994 respectievelijk 1999 en beschrijven de effecten over een periode van 8 jaar respectievelijk 13 jaar na het begin van de gaswinning. Deze derde rapportage is gebaseerd op gegevens tot 2003/2004. Voor meer achtergrondinformatie wordt verwezen naar het evaluatierapport van maart 2000 en het nieuwe monitoringsprogramma 2000-2010 die op de bijgevoegde CD aanwezig zijn. De bodemdaling vond plaats in de vorm van een grote schotel met een doorsnede van ongeveer 15 km, en werd meetbaar vanaf 1987. In de periode daarna, ongeveer tot het jaar 2000, daalde de bodem in het centrum van de schotel met ongeveer 1,8 cm per jaar. Daarna begon de dalingssnelheid wat af te nemen, door de daling van de druk in het veld, tot circa 1,2 cm per jaar. In 2003 bedroeg de bodemdaling in het centrum van de bodemdalingschotel 27 cm. Verwacht wordt dat de bodemdaling steeds verder af zal nemen totdat hij rond het jaar 2020 geheel beeindigd zal zijn. In 2000 zijn de resultaten gepresenteerd in een openbaar debat. Sindsdien zijn verschillende verbeteringen doorgevoerd. De highlights van de afgelopen 5 jaar zijn de publicatie van het onderzoeksprogramma 2000-2010, het vogelonderzoek, de uitgebreide metingen op de wadplaten en de nieuw ontwikkelde techniek van spijkermetingen. Daarnaast heeft het nieuwe programma voor de

  12. Registro recente de harpia, Harpia harpyja (Linnaeus (Aves, Accipitridae, na Mata Atlântica da Reserva Natural Vale do Rio Doce, Linhares, Espírito Santo e implicações para a conservação regional da espécie Recent record of harpy eagle, Harpia harpyja (Linnaeus (Aves, Accipitridae, in Atlantic forest of Vale do Rio Doce Natural Reserve, Linhares, Espírito Santo, Brazil and implications for the regional conservation of the species

    Directory of Open Access Journals (Sweden)

    Ana C. Srbek-Araujo

    2006-12-01

    Full Text Available A presente comunicação reporta o registro de um macho adulto de harpia, Harpia harpyja (Linnaeus, 1758, na Reserva Natural da Vale do Rio Doce (RNVRD, região norte do Espírito Santo, em agosto de 2005. A análise deste e de registros históricos da espécie nesta reserva indica a presença de uma população residente na região compreendida pela RNVRD e pela Reserva Biológica de Sooretama. Estas duas reservas, contíguas entre si, compreendem cerca de 46250 ha de Floresta Atlântica de baixada (Mata de Tabuleiro, na sua maior parte bem conservada. Além da grande extensão de floresta, a rica e densa fauna de mamíferos presente nestas reservas contribuem para a permanência das harpias na região.The present communication reports an observation occurred in August 2005 of the harpy eagle, Harpia harpyja (Linnaeus, 1758, in the Vale do Rio Doce Natural Reserve (VRDNR, located in northern Espírito Santo state, southeastern Brazil. The analysis of this and past records of the species in this reserve indicates the presence of a resident population in the region encompassed by the VRDNR and the Sooretama Biological Reserve. These two reserves total circa 46,250 ha of lowland Atlantic forest (Tabuleiros forest, which are mostly well preserved. Besides the great extension of forests, the rich and abundant mammal fauna present in these two reserves contribute to the regional permanence of the harpy eagle.

  13. Adição de carotenóides naturais e artificiais na alimentação de galinhas poedeiras: efeitos na qualidade de ovos frescos e armazenados Addition of natural and synthetic carotenoids, in hen feed: effects in the egg quality and storage

    Directory of Open Access Journals (Sweden)

    Fernanda Papa Spada

    2012-02-01

    Full Text Available A pesquisa teve como objetivo avaliar os atributos de qualidade e de durabilidade dos ovos de duas diferentes linhagens de poedeiras, com dietas contendo aditivos artificiais ou naturais, em diferentes períodos de armazenamento. Foram quantificadas durante o armazenamento as variáveis perda de peso, pH da gema e albúmen, gravidade específica, índice de gema (IG e foi realizada também classificação por peso e Unidade Haugh (UH. Os resultados foram avaliados segundo teste de Tukey (P≤0,05. As linhagens diferiram quanto à classificação extra dos ovos, com maior porcentagem para a Isa Brown. Os ovos obtidos das poedeiras Carijó apresentaram maior porcentagem de gema (Carijó 30,66 e Isa-Brown 24,55. O tempo de armazenamento fez com que a porcentagem de gema aumentasse nas duas linhagens (Carijó 30,66 tempo zero para 34,85 depois de 36 dias; e Isa- Brown de 24,55 para 27,48. As dietas com aditivos artificiais ou naturais não influenciaram a porcentagem de clara (% Clara 58,72 Controle; 59,52 Aditivo; 60,11 Urucum 1,5%; 59,43 e de gema %Gema 27,64 Controle; 27,90 Aditivo; 27,21 Urucum 1,5%; 27,66 Urucum 2%. O pH da clara diferiu entre os tratamentos no tempo inicial e aos 36 dias de armazenamento, mas o pH da gema não diferiu durante todo o armazenamento. O índice de gema diferiu nos tempos de armazenamento, mas não diferiu considerando os tratamentos. Em dietas com aditivos artificiais ou naturais, as linhagens e os tempos de armazenamento influenciam na qualidade e durabilidade dos ovos.The research has the aim of evaluating quality and durability attributes of eggs from two hens lines feed with and without natural or synthetics additives, at several storage periods. During storage, weight lost, albumen and yolk pH, specific gravity andyolk index (IG were quantified , as well as, weight classification and Haugh Unit (HU The results were analyzed by Tukey test (P≤0.05. Quality differences are bigger by lines and storage time and

  14. Chemical behaviour of trivalent and pentavalent americium in saline NaCl-solutions. Studies of transferability of laboratory data to natural conditions. Interim report. Reported period: 1.2.1993-31.12.1993

    International Nuclear Information System (INIS)

    Runde, W.; Kim, J.I.

    1994-09-01

    In order to clarify the chemical behaviour of Americium in saline aqueous systems relevant for final storage this study deals with the chemical reactions of trivalent and pentavalent Americium in NaCl-solutions under the influence of radiolysis from its own alpha radiation. The focus of the study was on investigating the geologically relevant reactions, such as hydrolysis or carbonate- and chloride complexing in solid-liquid equilibriums. Comprehensive measurements on solubility and spectroscopic studies in NaCl-solutions were carried out in a CO 2 -free atmosphere and 10 -2 atm CO 2 partial pressure. Identification and characterisation of the AM (III) and AM(V) solid phases were supplemented by structural research with the chemically analogue EU (III) and Np(V) compounds. The alpha-radiation induced radiolysis in saline NaCl solutions and the redox behaviour of Americium which was influenced thereby were spectroscopically quantified. (orig.) [de

  15. Altered Na+ transport after an intracellular alpha-subunit deletion reveals strict external sequential release of Na+ from the Na/K pump.

    Science.gov (United States)

    Yaragatupalli, Siddhartha; Olivera, J Fernando; Gatto, Craig; Artigas, Pablo

    2009-09-08

    The Na/K pump actively exports 3 Na(+) in exchange for 2 K(+) across the plasmalemma of animal cells. As in other P-type ATPases, pump function is more effective when the relative affinity for transported ions is altered as the ion binding sites alternate between opposite sides of the membrane. Deletion of the five C-terminal residues from the alpha-subunit diminishes internal Na(+) (Na(i)(+)) affinity approximately 25-fold [Morth et al. (2007) Nature 450:1043-1049]. Because external Na(+) (Na(o)(+)) binding is voltage-dependent, we studied the reactions involving this process by using two-electrode and inside-out patch voltage clamp in normal and truncated (DeltaKESYY) Xenopus-alpha1 pumps expressed in oocytes. We observed that DeltaKESYY (i) decreased both Na(o)(+) and Na(i)(+) apparent affinities in the absence of K(o)(+), and (ii) did not affect apparent Na(o)(+) affinity at high K(o)(+). These results support a model of strict sequential external release of Na(+) ions, where the Na(+)-exclusive site releases Na(+) before the sites shared with K(+) and the DeltaKESYY deletion only reduces Na(o)(+) affinity at the shared sites. Moreover, at nonsaturating K(o)(+), DeltaKESYY induced an inward flow of Na(+) through Na/K pumps at negative potentials. Guanidinium(+) can also permeate truncated pumps, whereas N-methyl-D-glucamine cannot. Because guanidinium(o)(+) can also traverse normal Na/K pumps in the absence of both Na(o)(+) and K(o)(+) and can also inhibit Na/K pump currents in a Na(+)-like voltage-dependent manner, we conclude that the normal pathway transited by the first externally released Na(+) is large enough to accommodate guanidinium(+).

  16. A Inovação Tecnológica na Sociedade do Conhecimento e o Papel Social da Embrapa no Desenvolvimento Regional

    Directory of Open Access Journals (Sweden)

    Fabiana Cunha Viana Leonelli

    2011-06-01

    Full Text Available Em um ambiente caracterizado, cada vez mais, pelo acesso a informação e, principalmente, pela transversalidade do conhecimento, faz-se necessário compreender como a inovação tecnológica pode ter reflexos tangíveis e intangíveis na organização.A inovação pode ser entendida como a capacidade que a empresa tem em gerar novas idéias, identificar oportunidades e transformar esforços em produtos comercializáveis, buscando vincular a inovação com a geração de valor para a empresa, quase sempre, financeiro. No caso da Empresa Brasileira de Pesquisa Agropecuária – Embrapa, a geração de valor advinda das inovações se expressa não apenas pela arrecadação de royalties, mas, sobretudo, pelo avanço do conhecimento e pelos benefícios sociais e ambientais que uma tecnologia pode gerar para quem a adota, para o entorno e para a sociedade. Neste sentido, pensar a inovação tecnológica nesta dimensão é complexo e envolve elementos que extrapolam os fatores tradicionais de produção. A capacidade inovadora é formada por uma sinergia entre cultura organizacional, processos internos e relacionamentos inter-organizacionais.

  17. Atuação de Acidithiobacillus na solubilização de fosfato natural em solo de tabuleiro cultivado com jacatupé (Pachyrhizus erosus Effect of Acidithiobacillus on solubilization of natural phosphate in a coastal tableland soil under yam bean (Pachyrhizus erosus crop

    Directory of Open Access Journals (Sweden)

    N. P. Stamford

    2004-02-01

    Full Text Available Realizou-se um experimento em casa de vegetação para avaliar a atuação do enxofre (S inoculado com Acidithiobacillus na disponibilidade de fósforo (P de fosfato natural (FN, em diferentes modos de aplicação do fertilizante, em um Espodossolo Ferrocárbico Órtico, do tabuleiro costeiro da Zona da Mata de Pernambuco, cultivado com jacatupé (Pachyrhizus erosus. As plantas foram inoculadas com rizóbio (NFB 747 e NFB 748 e adicionado tratamento-controle sem inoculação com rizóbio. Os tratamentos com P foram: (1 FN revestindo o enxofre inoculado com Acidithiobacillus (FN S*, (2 FN revestido com S e com Acidithiobacillus (S* FN, (3 mistura FN com S e com Acidithiobacillus (FN + S*, (4 mistura FN com S e sem Acidithiobacillus (FN + S, (5 superfosfato triplo (ST e (6 sem aplicação de fósforo (P0. Os tratamentos foram aplicados: (a na superfície, (b em sulco 10 cm abaixo da semente, e (c em sulco 10 cm abaixo e ao lado da semente. A biomassa nodular foi maior no tratamento (FN + S* com melhor efeito quando aplicado ao lado e abaixo das sementes. O (FN + S* também aumentou a altura das plantas, a biomassa da parte aérea e das túberas e o N total da parte aérea, especialmente quando aplicado 10 cm abaixo das sementes. O P total da parte aérea foi mais elevado com (S* FN aplicado 10 cm abaixo das sementes. Os melhores teores de P no solo foram obtidos com (FN + S* e (S* FN, com efeito mais evidente quando aplicados 10 cm abaixo das sementes.A greenhouse experiment was carried out to evaluate the effect of sulphur (S inoculated with Acidithiobacillus on phosphorus (P availability from natural phosphate (NP using different fertilizer application methods on yam bean (Pachyrhizus erosus grown in a "Tableland Forest" soil (Podzol Hydromorphic dystrophic of the "Zona da Mata" in the State of Pernambuco, Brazil. Plants were inoculated with rhizobia strains (NFN 747 and NFB 748 and control treatments added without rhizobia inoculation. The P

  18. Effect of the natural and artificial drying of leaf biomass Piper hispidinervum on the chemical composition of the essential oilEfeito da secagem natural e artificial da biomassa foliar de Piper hispidinervum na composição química do óleo essencial

    Directory of Open Access Journals (Sweden)

    Marília Pereira Machado

    2013-03-01

    Full Text Available Piper hispidinervum C.DC. is a plant native to the Amazon region, produces an essential oil rich in safrole. The aim of this study was to evaluate the effect of different methods of drying biomass in chemical composition of the essential oil of P. hispidinervum cultivated in Morretes (PR. The treatments were: fresh leaves; natural drying for 6 and 12 days; oven drying at 40°C for 6 and 12 days. The essential oil was extracted by hydrodistillation from samples of 50 g of each treatment in triplicate. The chemical composition of essential oil was performed by gas chromatography coupled to mass spectrometer (GC/ MS. The experimental design was completely randomized design with three replication and four plants per plot. Data were subjected to analysis of variance. The type and drying time changes the chemical composition of the essential oil of P. hispidinervum. The dried at 40°C for 12 days reduce the amount of essential oil components, but with increasing content of safrole. Piper hispidinervum C.DC. é uma planta nativa da Amazônia, produtora de óleo essencial rico em safrol. O objetivo do presente trabalho foi avaliar o efeito de diferentes métodos de secagem da biomassa folia de pimenta longa (P. hispidinervum, cultivada em Morretes (PR, na composição química do óleo essencial. Os tratamentos avaliados foram: folhas frescas; secagem natural por 6 e 12 dias; secagem em estufa à 40°C por 6 e 12 dias. O óleo essencial foi extraído por hidrodestilação a partir de amostras de 50 g de cada tratamento em triplicata. A determinação da composição química do óleo essencial foi realizada por cromatografia gasosa acoplada ao espectrômetro de massa (GC/MS. O delineamento experimental foi inteiramente casualizado, com três repetições e quatro plantas por parcela. Os dados obtidos foram submetidos à análise de variância. O tipo e tempo de secagem alteram a constituição química do óleo essencial de pimenta-longa. A secagem em

  19. Chemical behaviour of trivalent and pentavalent americium in saline NaCl-solutions. Studies of transferability of laboratory data to natural conditions. Interim report. Reported period: 1.2.1993-31.12.1993; Chemisches Verhalten von drei- und fuenfwertigem Americium in Salinen NaCl-Loesungen. Untersuchung der Uebertragbarkeit von Labordaten auf natuerliche Verhaeltnisse. Zwischenbericht. Berichtszeitraum 1.2.1993-31.12.1993

    Energy Technology Data Exchange (ETDEWEB)

    Runde, W; Kim, J I

    1994-09-15

    In order to clarify the chemical behaviour of Americium in saline aqueous systems relevant for final storage this study deals with the chemical reactions of trivalent and pentavalent Americium in NaCl-solutions under the influence of radiolysis from its own alpha radiation. The focus of the study was on investigating the geologically relevant reactions, such as hydrolysis or carbonate- and chloride complexing in solid-liquid equilibriums. Comprehensive measurements on solubility and spectroscopic studies in NaCl-solutions were carried out in a CO{sub 2}-free atmosphere and 10{sup -2} atm CO{sub 2} partial pressure. Identification and characterisation of the AM (III) and AM(V) solid phases were supplemented by structural research with the chemically analogue EU (III) and Np(V) compounds. The alpha-radiation induced radiolysis in saline NaCl solutions and the redox behaviour of Americium which was influenced thereby were spectroscopically quantified. (orig.) [Deutsch] Zur Klaerung des chemischen Verhaltens von Americium in endlagerrelevanten salinen aquatischen Systemen befasst sich die vorliegende Arbeit mit den chemischen Reaktionen des drei- und fuenfwertigen Americiums in NaCl-Loesungen unter dem Einfluss der Radiolyse durch die eigene {alpha}-Strahlung. Der Schwerpunkt dieser Arbeit lag auf der Untersuchung der geologisch relevanten Reaktionen, wie Hydrolyse sowie Carbonat- und Chloridkomplexierung in fest-fluessig Gleichgewichtssystemen. Hierzu wurden umfassende Loeslichkeitsmessungen und spektroskopische Untersuchungen in NaCl-Loesungen, sowohl unter CO{sub 2}-freier Atmosphaere als auch unter 10{sup -2} atm CO{sub 2}-Partialdruck, durchgefuehrt. Die Identifizierung und Charakterisierung der Am(III)- und Am(V)-Festphasen wurde ergaenzt durch strukturelle Untersuchungen mit den chemisch analogen Eu(III)- und Np(V)-Verbindungen. Die von der {alpha}-Strahlung induzierte Radiolyse in salinen NaCl-Loesungen und das dadurch beeinflusste Redoxverhalten von Americium

  20. A crise da Liga das Nações de 1926: realismo neoclássico, multilateralismo e a natureza da política externa brasileira The League of Nations crisis of 1926: neoclassical realism, multilateralism, and the nature of Brazilian foreign policy

    Directory of Open Access Journals (Sweden)

    Braz Baracuhy

    2006-12-01

    Full Text Available O artigo analisa a natureza da política externa brasileira na crise da Liga das Nações (1926, a partir de modelo teórico do realismo neoclássico. As dinâmicas por posições de poder nos tabuleiros geopolítico e multilateral do sistema internacional e as percepções e estratégias diplomáticas da elite de política externa brasileira são consideradas no estudo teórico.The article analyzes the nature of Brazilian foreign policy in the crisis of the League of Nations (1926 from a neoclassical-realist theoretical perspective. Within this theoretical framework, the dynamics of power positioning in the geopolitical and multilateral chessboards of the international system and the perceptions and diplomatic strategies of the Brazilian foreign-policy elite are taken into account.

  1. Capital intelectual e innovación: una sinergia necesaria

    Directory of Open Access Journals (Sweden)

    Nadia Ugalde Binda

    2011-01-01

    Full Text Available Muchos estudios se han hecho para medir el capital intelectual de las empresas, pero pocos demuestran su relación con la creación de ventajas competitivas que se transformen en utilidades. Existe el convencimiento general de que la sobrevivencia de las compañías y su capacidad de generar utilidades están muy vinculadas a su habilidad de reinventarse. Afortunadamente la innovación no proviene necesariamente de altas inversiones en investigación, su fuente principal es el capital intelectual que mejora los productos y servicios y la eficiencia en el uso de los recursos. En el presente trabajo se ha recopilado información sobre el capital intelectual y estudios anteriores sobre factores de éxito relacionados con la innovación. Convertir el capital intelectual en una ventaja competitiva y las innovaciones en utilidades debe ser la meta de toda empresa.

  2. Sinergia sostenida: las polillas y el Dr. Wolcott

    Science.gov (United States)

    Frank H. Wadsworth

    2007-01-01

    The synergy between an insect colony and a curious entomologist is described. Together they determine the relative preference of insects to over 80 woody species. The relationship between wood resistance and insect attacks and wood density and chemical composition of wood is also determined. Finally, a series of chemicals is tested to increase wood resistance to attack...

  3. A importância da hidrologia na prevenção e mitigação de desastres naturais / The importance of hydrology in the prevention and mitigation of natural disasters

    Directory of Open Access Journals (Sweden)

    Leandro Redin Vestena

    2008-01-01

    Full Text Available O presente artigo tem por objetivo apresentar os principais conceitos associados aos desastres naturais e destacar a importância da ciência hidrológica na prevenção e mitigação dos desastres naturais ocasionadospela dinâmica do movimento da água sobre, na e sob a superfície da Terra. A partir de uma breve revisão bibliográfi ca os fundamentos conceituais sobre desastres naturais são definidos e o número de ocorrências ofi ciais evidenciados quantitativamente por tipo, gênese e distribuição. Osdesastres naturais ocorridos no Brasil são essencialmente de origemhidrometeorológica, sendo assim analisa-se o papel da ciência hidrológicana prevenção e mitigação dos mesmos.

  4. Aplicação de um modelo matemático na simulação da produção e importação de gás natural no Brasil até 2017

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Gracias

    2010-08-01

    Full Text Available O governo federal, por meio de política de desenvolvimento, pretende ampliar a participação do gás natural na matriz energética nos próximos anos. Essa ampliação irá produzir um aumento da capacidade de abastecimento de energia elétrica com uso da geração de energia térmica com gás natural. Um modelo matemático capaz de possibilitar uma previsão futura do consumo e importação de gás natural é fundamental para o planejamento da matriz energética do Brasil. Este trabalho compara dois modelos matemáticos, o modelo de Verhulst (modelo logístico e o modelo de Malthus (modelo exponencial, com o objetivo de analisar as possibilidades desses modelos descreverem a evolução da produção e importação de gás natural no Brasil até 2017, a partir dos dados fornecidos pelo Balanço Energético Nacional desde 1970 até 2007. Toda parte computacional, gráficos, resolução das equações diferenciais e cálculos de linearização e método dos mínimos quadrados, foi feita com o uso do software MatLabÒ. Os resultados obtidos, por meio de gráficos, mostram que os modelos de dinâmica populacional (Verhulst e Malthus podem ser aplicados na modelagem da produção e importação de gás natural do Brasil.

  5. Na+,K+ pumpen vedbliver at overraske

    DEFF Research Database (Denmark)

    Vilsen, Bente

    2008-01-01

    This article provides an overview of news about the Na+,K+ pump, an indispensable enzyme whose protein structure has been described in a recent article in Nature, 50 years after its discovery. In combination with mutational analysis, the structure reveals the binding pocket for the K+ ions...... and the regulation of Na+ transport by a strategically located C-terminus of the protein. Focus is also on the pathophysiology of two neurological disorders, familial hemiplegic migraine and rapid-onset dystonia-parkinsonism, recently shown to be caused by mutations in the Na+,K+-ATPase. Udgivelsesdato: may 19...

  6. Influência da temperatura e da natureza do catalisador na polimerização do glicerol Influence of temperature and nature of the catalyst on glycerol polymerization

    Directory of Open Access Journals (Sweden)

    Miguel de A. Medeiros

    2010-09-01

    Full Text Available Neste trabalho, a polimerização do glicerol na presença de catalisador ácido (H2SO4 ou H3PO4 e básico (NaOH, para produzir resinas termofixas foi investigada. Os resultados mostraram que as variáveis como a temperatura de reação, o tipo e a concentração do catalisador são críticas para a obtenção de bons rendimentos e seletividade para materiais poliméricos. Em condições otimizadas, i.e. H2SO4 como catalisador, 140 °C por 24 horas, foi possível obter polímeros com 98% de seletividade. Após polimerização, os materiais obtidos foram submetidos a extrações com diferentes solventes, i.e. água, THF e hexano. Os extratos foram caracterizados por ESI(+-MS e por espectroscopia na região do infravermelho, que permitiram verificar a presença de oligômeros de até seis unidades monoméricas. Para menores tempos de reação, e.g. 4 horas, foi possível obter elevada seletividade (100% para oligômeros, mas com baixa conversão de glicerol (25%. Além disso, verificou-se que os outros catalisadores (H3PO4 e NaOH apresentam baixa atividade para promover a polimerização do glicerol, e.g. rendimento de 25% após 24 horas.In this work, an investigation was made of the glycerol polymerization in the presence of acid (H2SO4 or H3PO4 and base (NaOH catalysts to produce thermosetting resins. The results showed that the reaction temperature and catalyst concentration are critical to obtain good yield and selectivity. Under optimum condition, i.e. H2SO4 catalyst, 140 °C for 24 hours it was possible to obtain polymers with 98% selectivity. After the polymerization the materials were submitted to extractions with different solvents, i.e. water, THF and hexane. The extracts were characterized by ESI(+-MS (Electro-Spray Ionization Mass Spectrometry and by FTIR, showing the presence of short-chain oligomers (up to six units. For shorter reaction times, e.g. 4 hours, it was possible to obtain high selectivity (100% for oligomers, but with low

  7. Mosaico digital de aerofotos não-convencionais na avaliação de recursos naturais: estudo de caso Digital mosaic of non-conventional aerial photographs in the evaluation of natural resources: case study

    Directory of Open Access Journals (Sweden)

    Alexson de M. Cunha

    2006-03-01

    Full Text Available Pelo presente trabalho avaliou-se a utilização de aerofotos não-convencionais na forma de mosaico digital, como ferramenta básica no levantamento de solos e seu uso. O aerolevantamento foi realizado em quatro microbacias do município de Guarapari, ES. Foram feitas oito faixas de sobrevôos fotográficos com recobrimento longitudinal de 60% e lateral de 40%. A partir da digitalização de fotografias com elementos no tamanho 9 x 9 cm na escala aproximada de 1:25.000, produziu-se um mosaico digital com o auxílio do software Visual Stitcher. Os mapas de solos e de uso da terra foram delineados sobre o mosaico georreferenciado, com a utilização de digitalização em tela do software Idrisi 32. O uso do mosaico digital facilitou e agilizou o processo de mapeamento dos solos e da delimitação do uso da terra na área estudada.The present work evaluated the use of non-conventional aerial photographs in digital mosaic format as a basic tool for soils and land use surveys. The aerial survey was accomplished over small basins from Guarapari, Espírito Santo State, Brazil. Eight flight lines were made with 60% of longitudinal overlap and 40% of lateral overlap. The digital mosaic was produced with the software Visual Stitcher starting from the digitizing of photographic elements in 9 x 9 cm size in the approximate scale of 1:25,000. The soils and land use maps were delineated on the geo-referenced mosaic by on-screen digitizing tool of Idrisi 32. The use of digital mosaic facilitated and speeded up the soil and land use surveys.

  8. An enhancement to the NA4 gear vibration diagnostic parameter

    Science.gov (United States)

    Decker, Harry J.; Handschuh, Robert F.; Zakrajsek, James J.

    1994-01-01

    A new vibration diagnostic parameter for health monitoring of gears, NA4*, is proposed and tested. A recently developed gear vibration diagnostic parameter NA4 outperformed other fault detection methods at indicating the start and initial progression of damage. However, in some cases, as the damage progressed, the sensitivity of the NA4 and FM4 parameters tended to decrease and no longer indicated damage. A new parameter, NA4* was developed by enhancing NA4 to improve the trending of the parameter. This allows for the indication of damage both at initiation and also as the damage progresses. The NA4* parameter was verified and compared to the NA4 and FM4 parameters using experimental data from single mesh spur and spiral bevel gear fatigue rigs. The primary failure mode for the test cases was naturally occurring tooth surface pitting. The NA4* parameter is shown to be a more robust indicator of damage.

  9. Alternatives for the Santos Basin natural gas insertion in the energetic matrix; Alternativas para a insercao do gas da Bacia de Santos na matriz energetica. Estudo de caso: cidade de Santos

    Energy Technology Data Exchange (ETDEWEB)

    Awazu, Ricardo de Mello [Grupo MKR, Sao Paulo, SP (Brazil). Gerencia de Novos Negocios], e-mail: ricardo@mkr.com.br; Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-Graduacao em Energia (PIPGE)], e-mail: edsantos@iee.usp.br

    2008-07-01

    The natural gas difficult to penetrate in the residential market and compete with electrical energy is the main objective of this study, which will support that in big cities, where natural gas is already reality or will be the use of natural gas should not be considered competition for other types of energy resources but as a strategically complement of the overall power system. Electricity used as thermal source creates only demand for concessionaires and not consumption, in other words, there is short period of time when demand peaks and the amount of energy consumed by the electric shower is so high that requires a huge infra-structure of generation, transmission and distribution. However, it creates a big idle capacity in periods off-peak. The replacement of electricity to natural gas in water heating is critical factor to make the pipeline network economically feasible and to consolidate the residential market. The use of natural gas only to cooking purposes makes the network very costly and with high idle capacity. This study will discuss how an integrated planning of resources can lead to a better use of energy resources and distribution network of natural gas and electricity. (author)

  10. Acesso ao cuidado na Estratégia Saúde da Família: equilíbrio entre demanda espontânea e prevenção/promoção da saúde

    Directory of Open Access Journals (Sweden)

    Armando Henrique Norman

    2015-03-01

    Full Text Available Este artigo propõe algumas diretrizes para a organização do trabalho na Atenção Primária à Saúde (APS e na Estratégia Saúde da Família (ESF, relacionadas aos desafios de prover acesso e equilibrar no cotidiano dos serviços ações de prevenção de agravos e promoção da saúde com o cuidado ao adoecimento. Primeiramente, apresenta algumas ideias específicas sobre a importância do acesso para a qualidade dos serviços de saúde, seguidas de uma crítica sintética - fundamentada nos conceitos de Geoffrey Rose - à estratégia preventiva de alto risco, que tem tido alto impacto na organização das rotinas assistenciais. A seguir, contextualiza a promoção da saúde relacionada ao cuidado individual na APS/ESF, discutindo o potencial sinérgico do cuidado e da promoção da saúde, em suas dimensões individuais e coletivas, para transcender o modelo biomédico/mecanicista. Finalmente, apoiado nos tópicos anteriores, no que tange aos seus desdobramentos operacionais e utilizando um exemplo concreto, propõe algumas diretrizes para a organização do trabalho e das agendas de médicos e enfermeiros da ESF, de modo a viabilizar equilíbrio e sinergia entre acesso ao cuidado e prevenção/promoção, com vistas ao fortalecimento da ESF como coordenadora local do cuidado e principal porta de entrada do Sistema Único de Saúde.

  11. Análise da percepção de risco e vulnerabilidade a partir dos alunos do ensino médio na vivência de Nova Friburgo RJ após desastre natural de 2011

    Directory of Open Access Journals (Sweden)

    Denise Gonzalez

    2016-06-01

    Full Text Available A precipitação intensa num intervalo de poucas horas, causou uma série de deslizamentos de encostas e enchentes e/ou inundações de rios na Região Serrana do Estado do Rio de Janeiro, Brasil, especialmente no município de Nova Friburgo no mês de janeiro de 2011. Baseada na vivência dos alunos do 1º ano do Ensino Médio de dois colégios da rede estadual de ensino, esta pesquisa se utilizou do fato desta região ter sofrido este evento extremo. Observou-se a percepção de risco dos alunos através do que viveram e com os conteúdos da geografia Com o aplicativo Google Earth,foi elaborado o mapa de área de risco pelos mesmos, havendo uma comparação entre os resultados encontrados nas duas escolas, além de confrontá-los com dados da prefeitura sobre o assunto. Além disso, houve a análise da vulnerabilidade da população a partir de mapas temáticos com base no censo do IBGE(2010.

  12. Entre a natureza e o artifício: a concepção de nação nos tempos da independência Between nature and artifice: the conception of nation in times of the independence

    Directory of Open Access Journals (Sweden)

    Elías Palti

    2010-01-01

    Full Text Available Como mostrou a literatura recente sobre a revolução da independência, a articulação de uma certa identidade nacional, contrariamente ao que afirmam as histórias nacionais tradicionais, não foi o ponto de partida senão o término final do processo de ruptura do vínculo colonial. E isso terá consequências historiográficas decisivas, posto que faz surgir a pergunta do que, então, o colocou em marcha. A chamada crítica "revisionista" abrirá as portas a esta pergunta só ao preço de declará-la insolúvel de antemão. A afirmação da persistência de imaginários tradicionais resulta em um ponto de vista da revolução como o resultado de uma série de acidentes, sem chegar a explicar porque os ditos acidentes tiveram as consequências que tiveram. Sem dúvida, alguma ideia de nação se encontrava operando então, posto que do contrário a vacância real não havia tido as consequências que teve. Definitivamente, pretender explicar tais sucessos sobre a base de um conceito de nação que, na realidade, só na segunda metade do século XIX receberia forma é um simples anacronismo; a negação da existência de toda ideia de nação (como se ela antes de mencionada fosse a única possível e verdadeira também o é. À pergunta antes assinalada cabe então retraduzi-la do seguinte modo: que ideias de nação e autodeterminação puderam desenvolver-se no dito contexto político-intelectual e sem as quais não poderia haver se produzido o tipo de ruptura política que então se produziu; enfim, como pôde surgir a ideia de que os territórios americanos eram nações, e que puderam, portanto, reclamar direitos soberanos e autogovernar-se. O trabalho se propõe a reconstruir a série de deslocamentos político-conceituais que precederam a revolução da independência na América Latina e que, se bem que não a anteciparam, terminaram abrindo lugar para que esta se tornasse concebível.As shown by the recent literature on the

  13. Parametri za procena na kvalitetot na polietilenska i na polipropilenska ambalaza i na gumeni zatvoraci nameneti za farmacevtski preparati

    Directory of Open Access Journals (Sweden)

    Liljana Ugrinova

    2002-03-01

    Full Text Available Napraven e pregled na parametrite za procena na kvalitetot na polietilenska i na polipropilenska ambalaza i na gumeni zatvoraci nameneti za farmacevtski preparati. Za procena na kvalitetot na ispituvaniot materijal bea izvrseni fizicki, hemiski i bioloski ispituvanja spored postapkite dadeni vo Ph. Eur., DIN i spored DIN ISO standardite. Baranjata za kvalitet na ovoj vid ambalaza propisani spored Ph. Eur., DIN i DIN ISO standardite se razlikuvaat vo odnos na predvidenite parametri za fizicki, za hemiski i za bioloski ispituvanja. Isto taka, propisani se i razlicni granici na dozvoleno otstapuvanje na oddelni parametri.

  14. Hábitos alimentares, infecção natural e distribuição de triotomíneos domiciliados na região nordeste do Brasil Feeding habits, natural infection and distribution of domiciliary Triatominae bugs Northeast of Brazil

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    Oswaldo Paulo Forattini

    1981-04-01

    Full Text Available São apresentadas as informações obtidas no inquérito triatomíneo levado a efeito na região nordeste do Brasil. As características biogeográficas incluem a presença de áreas semi-áridas da caatinga e amplas faixas transicionais com outras feições paisagísticas. Entre estas foram incluídas as da floresta tropical atlântica e as inclusões florestadas mais extensas. No período de 1975 a 1980 foram examinados 15.342 triotomíneos coletados no ambiente domiciliar, visando detectar as presenças de sangue ingerido e de infecção natural por Trypanosoma tipo cruzi. O conteúdo intestinal foi submetido a reações com antisoros para homem, cão, gato, roedor (Kattus, marsupial (Didelphis e ave (Gallus. Por ordem de freqüência, as espécies encontradas foram Triatoma pseudomaculada (40,6%, Panstrongylus megistus (19,7%, Triatoma brasiliensis e T. sordida (ambos com 14,3%, Rhodnius nasutus (6,1% e Triatoma infestans (1,1%; além de em algumas outras raras. A presença de sangue foi detectada em 42,4% e a infecção em 3,4% desse total de espécimens examinados. Observou-se elevada mobilidade alimentar, com coeficientes gerais de 54,8% para ave e 30,0% para homem. Em nível específico pôde determinar apreciável grau de antropofilia em P. megistus e, em menor intensidade, em T. brasiliensis. Por sua vez, T. infestans mostrou-se altamente antropófilo. Observou-se apreciável ornitofilia em T. pseudomaculata e T. sordida, com elevada intensidade em R. nasutus. Por outro lado, a presença de sangue humano em espécimens capturados no peridomicílio indicou a ocorrência de freqüente mobilidade espacial, com exceção de T. infestans que não mostrou evidências de abandonar o domicílio. A tendência à domiciliação, além desta, revelou-se apreciável em P. megistus, moderada em T. brasiliensi, T. pseudomaculata, T. sordida e praticamente nula em R. nasutus. A distribuição geográfica confirmou o caráter autóctone de T

  15. Jundiaí (SP: transformações recentes na paisagem urbana

    Directory of Open Access Journals (Sweden)

    Adriana Fornari Del Monte Fanelli

    2014-06-01

    Full Text Available O objetivo deste trabalho é analisar aspectos condicionantes das transformações e as tipologias presentes na paisagem urbana de Jundiaí na região situada às margens das rodovias Dom Gabriel P. B. Couto e João Cereser, nas proximidades da serra do Japi. A partir da conceituação de Magnoli (1982 de espaços livres, e através da análise de informações de diversas naturezas, como legislações urbanísticas, fotos aéreas e visitas in loco, pode-se afirmar que Jundiaí, cidade-polo do Aglomerado Urbano de Jundiaí (AUJ, caracteriza-se pela presença de grandes áreas de preservação ambiental, como a serra do Japi, e áreas de conservação de mananciais, que impedem a expansão urbana para os vetores sul ou leste, favorecendo o crescimento da forma urbana no sentido noroeste e oeste. Devido à sua localização, num espaço intersticial entre as Regiões Metropolitanas de São Paulo, Campinas e o Aglomerado Urbano de Sorocaba (AUS, a cidade convive com diversas influências socioeconômicas e espaciais decorrentes do processo de metropolização típico da macrometrópole paulista. Assim, as áreas de preservação ambiental, as presenças de espaços livres não urbanizados de grandes proporções e a sinergia de Jundiaí com a rede de cidades dos Aglomerados Urbanos tornaram-se os principais agentes transformadores da paisagem urbana deste território.

  16. Efeito dos compostos naturais bioativos na conservação pós-colheita de frutos de mangueira cv. Tommy Atkins Effects of bioactive natural compounds on the postharvest conservation of mango fruits cv. Tommy Atkins

    Directory of Open Access Journals (Sweden)

    Maria Julia da Silva Cruz

    2010-04-01

    Full Text Available A antracnose causa severos danos na pós-colheita de manga. Como o controle químico tem demonstrado desvantagens, o potencial uso de óleos essenciais para o controle de fitopatógenos tem sido uma alternativa. Neste trabalho, objetvou-se avaliar a eficácia de produtos alternativos no controle da antracnose e na conservação de mangas (Mangifera indica cv. Tommy Atkins tratado com bicarbonato de sódio diluído em água destilada, na concentração de 3% (v/v, via imersão. Como tratamento, foram utilizados os óleos essenciais de Origanum majorana, Citrus sinensis, Cymbopogon citratus e Eucalyptus citriodora, via fumigação, na dosagem de 1000 μL e água destilada via fumigação; todos por 3 minutos. Frutos da Unidade CEASA-Maringá/PR, selecionados, pesados em balança semianalítica, desinfetados em imersão por 3 minutos em solução de hipoclorito de sódio a 0,5% (v/v; foram submetidos aos tratamentos, permanecendo sob condições ambientes (26 ± 2ºC e UR 90 ± 5%. Exceto o tratamento com Citrus sinensis, que proporcionou um pH maior do que a testemunha, diferindo significativamente dos demais tratamentos que elevaram a variável. A redução da acidez em todos os tratamentos e aumentos dos sólidos solúveis totais nos frutos, sendo que o tratamento com bicarbonato de sódio proporcionou 14,42 ºBrix. O número de frutos com antracnose foi menor no tratamento com Citrus sinensis e este diferiu dos demais comprovando o efeito de espécies do gênero Citrus como antifúngicos. O uso de óleos essenciais como o de Citrus sinensis controlou a antracnose e manteve a qualidade dos frutos.The anthracnose causes severe damages to the mango post-harvest. As chemical control has shown disadvantages, the potential of use of essential oils has been an alternative for the phytopathogen control. The objective of the present work was to evaluate the efficacy of alternative products in the anthracnose control and in the conservation of mangos

  17. Impactos ambientais decorrentes de vazamento de gás natural de baixa e média pressões, na área urbana central do município de São Paulo

    OpenAIRE

    Moscardi, Jean Prost [UNESP

    2005-01-01

    Com o crescente desenvolvimento do mercado de gás o Brasil e, conseqüente, mudança da matriz energética do país, iniciou-se a procura por tecnologias as quais atenderiam as novas demandas. A área de Meio Ambiente, cada vez mais, está sendo direcionada como ponto-chave enquanto condicionante na realização ou não de qualquer evento. O trabalho aborda de maneira sucinta, as interações existentes entre empreendimento, tubulações de gás apresentando baixas e médias pressões; e, a área de atuação e...

  18. Terminação de novilhos de corte Angus e mestiços em pastagem natural na região da Campanha do RS Finishing of Angus and crossbred beef cattle on native pasture in the Campanha region of RS

    Directory of Open Access Journals (Sweden)

    Eduardo Tonet Ferreira

    2011-09-01

    Full Text Available Avaliou-se a viabilidade de abater animais de distintos grupos raciais com até quatro dentes em diferentes tipos de pastagem: natural, adubada, e melhorada por fertilização e sobressemeadura de espécies hiberno-primaveris. O delineamento experimental utilizado foi o de blocos ao acaso, com três repetições. Os dados foram agrupados em estações do ano (inverno e primavera e submetidos à análise de variância. Foram utilizados novilhos de corte Angus e mestiços, ambos com média de idade inicial de 20 meses. A massa de forragem total e a altura do pasto apresentaram diferenças entre os tipos de pastagem e as estações do ano. A taxa de lotação e a massa de forragem verde sofreram interação entre o tipo de pastagem e a estação do ano. O ganho por área ao longo do experimento foi maior na pastagem adubada (259 kg/ha e melhorada (263 kg/ha em comparação à pastagem natural (126 kg/ha. O ganho médio diário foi maior para os novilhos Angus (1,087 kg/dia e na estação de inverno (1,251 kg/dia. Não houve diferença para a área de olho-de-lombo entre o tipo de pastagem e grupo racial na data do abate. A espessura de gordura subcutânea sofreu interação entre o tipo de manejo e o grupo racial, uma vez que novilhos mestiços depositaram mais gordura na pastagem adubada e novilhos Angus na melhorada. Animais mestiços atingiram menor peso ao abate (505 kg, porém maior rendimento de carcaça (51,6%. Somente os animais mantidos na pastagem natural não atingiram acabamento suficiente para a comercialização. A utilização de fertlizantes e sementes na pastagem natural possibilita o abate de novilhos precoces independente do grupo racial. O ambiente pastoril determina diferentes respostas produtivas conforme a genética utilizada. O cruzamento é uma alternativa para incrementar atributos importantes da carcaça e diminuir o tempo de terminação.The viability for slaughtering steers of distinct breeds with four teeth at most, on

  19. Teste do efeito de borda na predação de ninhos naturais e artificiais no Cerrado A test of the edge effect on predation of natural and artificial bird nests in the Cerrado

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    Letice C. França

    2009-06-01

    Full Text Available The Cerrado is still one of the most important ecosystems in Brazil, even though more than 50% of its area has been altered or converted to pastureland and plantations. Despite its intense degradation, few ecological processes that might affect its biodiversity have been evaluated. The goal of this study was to test the edge effect on the predation rates at natural and artificial nests, at the Ecological Station of Águas Emendadas, Federal District, Brazil. Natural nests were found and monitored every three to four days from September to December of 2004 in the interior and at the edge of the reserve. Artificial nests were placed at four distances from the edge (0, 500, 1000 and 2000 m in three spatial replicates in September and again in December of 2004. Each nest received one Japanese Quail and one plasticine egg and was monitored every five days, for 15 days. There was no difference between the rates of predation either in the natural nests or in the artificial nests between treatments. For one bird species, Elaenia chiriquensis (Lawrence, 1865, Tyrannidae, daily survival rates in the incubation and in the hatchling period had opposite values between the edge and the interior. Marks on plasticine eggs suggest that birds are the main predators. Estimates of the abundance of two potential nest predators, Cyanocorax cristatellus (Temminck, 1823, Corvidae and Canis familiaris (Linnaeus, 1758, Canidae, revealed no relationship with distance to the edge, nor with predation rates. Brood parasitism of natural nests was similar between the interior (0% and the edge (3.8% of the nests. The results described here do not support the edge effect hypothesis for nest predation rates on either natural or artificial nests, nor for brood parasitism rates.

  20. O papel de representações sociais sobre a natureza da homossexualidade na oposição ao casamento civil e à adoção por famílias homoafetivas The role of social representations about the nature of homosexuality: opposition to civil marriage and adoption by homoaffective families

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    Cicero Roberto Pereira

    2013-03-01

    Full Text Available Analisaram-se as relações entre preconceito, apoio a políticas discriminatórias contra homossexuais e representações sociais sobre a natureza da homossexualidade. Participaram da pesquisa 297 estudantes do último ano de psicologia, serviço social e direito. Os resultados mostram que as representações sobre a homossexualidade baseadas em crenças religiosas, moralistas e psicológicas predizem o maior apoio às políticas discriminatórias contra os homossexuais, nomeadamente a oposição ao casamento e à adoção de crianças por casais homoafetivos. A crença na natureza cultural da homossexualidade prediz o menor apoio a essas políticas. As relações verificadas são mediadas pelo preconceito flagrante contra homossexuais. Esses resultados mostram o papel desempenhado por representações sobre a natureza dos grupos sociais na manutenção de preconceitos e práticas discriminatórias contra minorias sociais.In this study the relationship between prejudice, support of discriminating policies against homosexuals and people's social representations about the nature of homosexuality was analyzed. Participants were 297 final year psychology, social work, and law students. Results showed that the representations about homosexuality based on religious, moralist, and psychological beliefs are positively related to the support of discriminating policies against homosexuals, specifically the opposition to civil union and to children's adoption by homosexuals. Beliefs about the cultural nature of homosexuality predicted lower support of these policies. These relations were mediated by blatant prejudice against homosexuals. These results show the role played by social representations about the nature of social groups in the maintenance of prejudices and discriminatory practices against minority groups.

  1. Health, biodiversity, and natural resource use on the Amazon frontier: an ecosystem approach Saúde, biodiversidade e uso de recursos naturais na fronteira da Amazônia: uma abordagem ecossistêmica

    Directory of Open Access Journals (Sweden)

    Tamsyn P. Murray

    2001-01-01

    Full Text Available This study aims to improve the health of rural Amazonian communities through the development and application of a participatory ecosystem approach to human health assessment. In the study area marked seasonal fluctuations dictate food availability, water quality and disease outbreak. Determining the causal linkages between ecosystem variables, resource use and health required a variety of forms of inquiry at multiple scales with local participation. Landscape spatial mapping of resource use demonstrated the diversity of the ecological resources upon which communities depend. Household surveys detailed family and individual consumption and production patterns. Anthropometric measurements, parasite loading, water quality and anemia levels were used as indicators of health status. This was complemented with an ethnographic and participatory health assessment that provided the foundation for developing community action plans addressing health issues. Discussion is focused on three attributes of an ecosystem approach; (a methodological pluralism, (b cross-scale interactions and (c participatory action research.O estudo visa melhorar a saúde das comunidades rurais amazônicas mediante o desenvolvimento e a aplicação de abordagem ecossistêmica participante na avaliação da saúde humana. Na área estudada, oscilações sazonais definem a disponibilidade de alimentos, a qualidade da água e a incidência de doenças. A determinação dos elos causais entre variáveis ecossistêmicas, uso de recursos e saúde exigiu uma gama de formas de investigação, em múltiplas escalas, com participação local. O mapeamento espacial da paisagem quanto ao uso de recursos mostrou a diversidade dos recursos ecológicos de que as comunidades dependem. Inquéritos domiciliares detalharam padrões de consumo e produção familiares e individuais. Medidas antropométricas, carga parasitária, qualidade da água e níveis de anemia foram empregados como indicadores

  2. Natureza, colonização e utopia na obra de João Daniel Nature, colonization, and utopia in the works of João Daniel

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    Kelerson Semerene Costa

    2007-12-01

    Full Text Available Este artigo analisa alguns aspectos do Tesouro descoberto no rio Amazonas, obra composta pelo padre João Daniel (1722-1776, missionário jesuíta no Estado do Maranhão e Grão-Pará entre 1741 e 1757, desterrado para Lisboa dois anos antes do banimento da Companhia de Jesus da América portuguesa. A obra, registro singular da Amazônia de meados do século XVIII, oferece um compêndio das riquezas e potencialidades da região. Sobretudo, apresenta um projeto para a colonização crítico ao modelo então em vigor e que se apresenta como um conjunto integrado que considera as condições ambientais, a técnica e as relações sociais na organização da sociedade local. Ao colocar no centro de seu projeto a questão do trabalho, João Daniel recupera, como metáfora, a idéia - marcante na literatura missionária do século XVII e praticamente abandonada no século XVIII - da Amazônia como paraíso terrestre.The article analyzes certain aspects of "Tesouro descoberto no rio Amazonas" (Treasure discovered on the Amazon River, written by João Daniel (1722-76 during his time in the State of Maranhão e Grão-Pará as a Jesuit missionary between 1741 and 1757; the priest was banished to Lisbon two years before the Company of Jesus was expelled from Portuguese America. This unique record of the mid-eighteenth-century Amazon is a compendium on the region's wealth and potential. Most importantly, it put forward a colonization project that was critical of the model then in place; the new proposal was an integrated whole which took environmental conditions, technology, and social relations into account in the organization of local society. In centering his project on the issue of labor, João Daniel revives, as a metaphor, the idea of the Amazon as an earthly paradise-a notion that had characterized seventeenth-century missionary literature but was practically abandoned in the eighteenth century.

  3. Use and misuse of the concepts of tradition and property rights in the conservation of natural resources in the atlantic forest (Brazil Uso e abuso dos conceitos de tradição e direitos de propriedade na conservação de recursos naturais na Mata Atlântica, Brasil

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    Fábio de Castro

    2006-06-01

    Full Text Available The relationship between resource management, local populations, and property regimes has long puzzled researchers and policy-makers. The constant failure of conservation policy reliant upon privatization and statization, has led both policy makers and researchers to recognize the importance of customary practices to achieve conservation. Yet, the overemphasis on "traditional populations" and "collective property regimes" as the way to promote conservation can be misleading. In this paper, we discuss the debate on local populations and resource conservation in the Southeastern Atlantic Forest, Brazil. The analysis focuses on 1 the concept of traditional populations; 2 the complexity of overlapping property regimes; 3 the potential for a loose relationship between "traditional populations" and "collective property regimes," and; 4 the implications of this approach for "non-traditional populations." We conclude that the bias toward "tradition" and "collective property regimes" threatens the entire range of local communities along what might be called a traditional-non-traditional populations gradient.O entendimento da inter-relação entre as formas de manejo de recursos naturais, o papel das populações rurais na conservação ambiental, e os regimes de propriedades para controlar o uso de recursos tem sido um grande desafio para pesquisadoes e administradores públicos. Exemplos de insucessos de políticas ambientais baseadas no sistema de propriedade privada ou estatal tem levado ao reconhecimento da importância de práticas locais de uso de recursos naturais para atingir o objetivo de conservação. Entretanto, a ênfase apenas em "populações tradicionais" e "regimes de propriedades coletivas" como solução para a conservação de recursos naturais tem criado alguns problemas conceituais e práticos. O presente artigo discute o debate sobre populações locais e as propostas de conservação na Mata Atlântica, enfocando quatro aspectos

  4. Effects of different NaCl Concentrations on germination and ...

    African Journals Online (AJOL)

    USER

    Salinity refers to the salt content of any given system. By nature, arid .... Effect of varying concentrations of NaCl on seed germination of Amaranthus hybridus in percentages. .... Osmotic differences could explain this phenomenon where by ...

  5. Incentivos, competências e conhecimento: evidência na França e integração teórica

    Directory of Open Access Journals (Sweden)

    Fabrice Galia

    2007-06-01

    Full Text Available Este artigo examina a criação do conhecimento, bem como a partilha e a transferência de processos em firmas de manufatura na perspectiva da inovação. Primeiramente, usando dados franceses, mostra a complementariedade entre a gerência de recursos humanos e as práticas de gerência do conhecimento (HRM e KM, e seu impacto na inovação. Expõe a diversidade organizational das firmas. Três conjuntos ou pacotes de práticas organizationais são identificados como "sistemas das práticas HRM e de KM". Caracterizamos, respectivamente, (i firmas tradicionais na organização do trabalho; (ii firmas usando práticas de gestão de pessoal com incentivos e (iii firmas de aprendizagem, adicionando aos incentivos práticas de gerência do conhecimento. Correspondem aos modelos organizationais teóricos, includindo arquiteturas organizationais modernas, baseadas em incentivos para desenvolver competências e conhecimento, sem deixar de lado firmas inspiradas em tayloring. Os resultados empíricos permitem concluir que os pacotes das práticas de HRM e de KM produzem significativo e positivo impacto no desempenho da inovação, quando mudanças marginais em práticas individuais dão pouco resultado. Além disso, a fim de confirmar tais complementariedades, concentramo-nos em quatro práticas específicas usadas, principalmente, por firmas: gerência da equipe, dos incentivos, do treinamento e do conhecimento. Empregamos novo procedimento, baseado no conceito de supermodularidade, para estudar a complementaridade e a substitutabilidade em casos onde práticas organizationais múltiplas afetam o desempenho inovativo. Este procedimento baseia-se na limitação múltipla da desigualdade. Nossos resultados sugerem que as firmas usam certas práticas de maneira comum e sistematicamente, que explicam sinergias existentes. O resultado confirma a noção de que a gerência do conhecimento é mais eficaz quando acompanhada pela organização da equipe e por

  6. THERMODYNAMICS OF ION-EXCHANGED NATURAL CLINOPTILOLITE

    Science.gov (United States)

    Natural clinoptilolite from Castle Creek, Idaho, and its cation-exchanged variants (Na-Cpt, NaK-Cpt, K-Cpt, and Ca-Cpt) were studied by high-temperature calorimetry. The hydration enthalpy for all clinoptilolites is about -30 kJ/mol H2O (liquid water reference state) at 25 C. T...

  7. Integrar sociedade e natureza na luta contra a fome no século XXI Integrating society and nature in the struggle against hunger in the 21st century

    Directory of Open Access Journals (Sweden)

    Ricardo Abramovay

    2008-11-01

    Full Text Available A compreensão do mundo contemporâneo exige um olhar naturalista do qual a obra de Josué de Castro é uma das mais importantes expressões: pensar de maneira articulada a vida social e a reprodução do ambiente natural em que se apóia - incluindo aí a natureza do próprio homem, seu corpo - é a pedra de toque do método geográfico praticado em Geografia da Fome. Esse método é importante não apenas para estudar aquelas regiões onde a fome se abate severamente sobre a vida da população, mas oferece uma importante chave de leitura dos problemas alimentares que se anunciam para o século XXI, quando a população mundial deverá ter um aumento de quase 50%. Os desafios produtivos dos próximos anos - que este artigo procura expor de maneira sumária - não poderão ser enfrentados com base nas técnicas que caracterizaram a Revolução Verde. Eles exigem uma compreensão refinada dos vínculos entre sistemas sociais e sistemas ecológicos, para a qual a obra de Josué de Castro é uma inspiração fundamental.Understanding the contemporary world requires a naturalist view, wherein the work of Josué de Castro is one of the most important expressions: taking a comprehensive approach to social life and reproduction of the natural environment that supports it - including the nature of humans themselves, their bodies - is the cornerstone of the geographic method practiced in Geografia da Fome [The Geography of Hunger]. This method is important for studying regions where hunger severely afflicts the populations, and also offers an important key for interpreting the food problems that are forecast for the 21st century, when the world population is expected to increase by nearly 50%. The food production challenges in the coming years - and which this article discusses briefly - cannot be solved with the techniques that characterized the so-called Green Revolution. Rather, they require a more refined understanding of the links between the

  8. Exploring Natural and Social Scientists' Views of Nature of Science

    Science.gov (United States)

    Bayir, Eylem; Cakici, Yilmaz; Ertas, Ozge

    2014-01-01

    Science education researchers recently turned their attention to exploring views about nature of science (NOS). A large body of research indicates that both students and teachers have many naïve views about the NOS. Unfortunately, less attention has been directed at the issue of exploring the views of the scientists. Also, the little research in…

  9. Natural gas

    Energy Technology Data Exchange (ETDEWEB)

    Fraser, J W

    1967-08-01

    This report on the natural gas industry of Canada includes: composition and uses of natural gas, production statistics, exploration and development, reserve estimates, natural gas processing, transportation, and marketing. For the Canadian natural gas industry, 1966 was a year of moderate expansion in all phases, with a strong demand continuing for sulfur and liquid hydrocarbons produced as by-products of gas processing. Value of natural gas production increased to $199 million and ranked sixth in terms of value of mineral ouput in Canada. Currently, natural gas provides over 70% of Canada's energy requirements. Proved remaining marketable reserves are estimated to be in excess of a 29-yr supply.

  10. At NA2

    CERN Multimedia

    1977-01-01

    One of the NA2 calorimeter sections is moved in. The NA2 calorimeter was divided in two halves, to the left and the right of the beam, each half consisting of sheets of passive high Z material interleaved with blades of plastic scintillators. The photo shows on the right, the upstream 'electron' module with eleven lead plates for a total radiation length of 20.

  11. The relationship between the industry of natural gas and the sector of electric power: perspectives for the united development of such segments in Bahia; Estudo da industria do gas natural e sua relacao com o setor eletrico na Bahia: perspectivas para uma integracao sinergica entre tais segmentos

    Energy Technology Data Exchange (ETDEWEB)

    Prates, Daniel O. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Rocha, Georges S. [Bahia Univ., Salvador, BA (Brazil). Dept. de Engenharia Quimica. Curso de Especializacao em Engenharia do Gas Natural

    2005-07-01

    The industry of natural gas is finding great inter-relationship with the electric power section due to aspects technical, economical and institutional. In Brazil, this world tendency is increasing quickly, above all, starting from the crisis of energy lived by the Country in 2001. In spite of, in spite of being the third producing largest and consume-pain in Brazil, Bahia now is deficient in natural gas, committing the thermal-electricity generation due to lack of this energy one as well as, of the deficiency in the transport and distribution infrastructure. Besides, Bahia is the Brazilian state with the largest population without access the electric power. This motivates reflections concerning the potentialities of the natural gas to lessen this situation. Therefore, this work has an objective to evaluate the structures of the industry of the natural gas and the electric section in Bahia and the relationship among these segments. Initially, it tries to present the reasons that it is taking the development of the electric power generation in consonance with the industry of the gas. Soon afterwards, it comes a retrospective abbreviation of the electric power generation in Brazil and in Bahia, emphasizing the recent tendency of use of the natural gas for the thermal-electricity generation. In the following point, it talks about the reservations and production of natural gas and he/she comes the structure of commercialization of gas from the production/importation to the distribution in Brazil and in Bahia. To proceed, the investment plans are evaluated for the enlargement of the production, transport and distribution of natural gas and electricity in Bahia. Finally, the article is concluded being discussed the difficulties and perspectives of increase and integration of the segments of natural gas and electric power in Bahia, tends in view the institutional aspects, technique and economical of a model that influences the use of the natural gas and contribute to the

  12. Polarization dependence of Na* + Na* associative ionization revisited

    NARCIS (Netherlands)

    Meijer, H.A.J.; Meulen, H.P. v.d.; Morgenstern, R.; Hertel, I.V.; Meyer, E.; Witte, R.

    1986-01-01

    The dependence of the associative ionization process Na 3 2P3/2 + Na 3 2P3/2 → Na2+ + e- on the polarization of the laser light used for Na excitation was independently investigated in Utrecht and Berlin. The purpose of this paper is to clarify discrepancies between two other earlier experimental

  13. Natural Gas

    OpenAIRE

    Bakar, Wan Azelee Wan Abu; Ali, Rusmidah

    2010-01-01

    Natural gas fuel is a green fuel and becoming very demanding because it is environmental safe and clean. Furthermore, this fuel emits lower levels of potentially harmful by-products into the atmosphere. Most of the explored crude natural gas is of sour gas and yet, very viable and cost effective technology is still need to be developed. Above all, methanation technology is considered a future potential treatment method for converting the sour natural gas to sweet natural gas.

  14. Mimesis e rememoração da natureza no sujeito em Theodor W. Adorno: para pensar a educação do corpo na escola Mimesis and remembrance of nature in the subject by Theodor W. Adorno: thinking body education at school

    Directory of Open Access Journals (Sweden)

    Jaison José Bassani

    2011-04-01

    Full Text Available A partir das contribuições da Teoria Crítica da Sociedade, de Theodor W. Adorno, o presente trabalho dedica-se a uma reflexão epistemológica e pedagógica sobre o tema do corpo e suas expressões, em especial no que se refere a dois de seus motivos originais: a questão da mimesis e a da rememoração da natureza no sujeito. Como resultado, destaca-se a posição dialética que o corpo ocupa no processo de esquecimento e denegação da natureza no sujeito, na medida em que, se a ideia de natureza e da memória do sujeito em relação a ela é expressão de uma subjetividade incerta e petrificada, por outro lado, no entanto, a partir da valorização do comportamento mimético no âmbito das práticas corporais, constitui-se a possibilidade de resistência aos imperativos da racionalidade instrumental.Based on the contributions from the Critical Theory of Society of Theodor W. Adorno, this paper makes an epistemological and pedagogical reflection on body and its expressions, specially on two original forces: mimesis and remembrance of nature in the subject. The body finds a dialectical place in the process of forgetting and refusing nature in the subject. If nature and the subject's memory are an expression of an uncertain and stoned subjectivity, mimetic behavior in corporal practices is however a possibility or resistance against instrumental rationality.

  15. Economic and market feasibility analysis, by the point of view of gas and electrical companies, for replacement of the electric powered showers by the natural gas powered showers in ABC Paulista area; Analise da viabilidade economica e do mercado, do ponto de vista das concessionarias de gas e de energia eletrica, pela substituicao de chuveiros eletricos por gas natural, na area do ABC paulista

    Energy Technology Data Exchange (ETDEWEB)

    Callari, Roberto [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Rosim, Sidney Olivieri [Rosim e Papaleo Consultoria e Participacoes Ltda. (Brazil)

    2008-07-01

    The possibility of an exchange of energy for heating residential water should be seen, by the point of view of the concessionaires, as a single market and exclusionary, in which the development of new customers by the concessionaire of electric energy directly involves the development of these non-customers for the distributor of natural gas. The study shows that, under the terms of concession of electricity, the loss of any part of the markets, current and expansion would be attractive only if the natural gas concessionaire could pass part of their earnings with customers users of electric showers that change their profile to the gas heaters, for electrical distribution. Under the terms of the concession to natural gas, the condition of massive investments replacement of electric showers and absorption of growth and expansion entrant with customers, increase the turnover to allow the search of a mechanism for transferring part of that revenue to absorb also customers of electricity. Thus, both the concessionaire of electricity preserve their revenue and, in turn, the concessionaire of natural gas would have an effective gain of revenue for the absorption of the customers of electric showers. (author.

  16. PLURALIZING NATURE

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2014-01-01

    Denmark is widely recognised for its democratic approach to planning and the idea of planning for the common good. This interest in the common good and common values seems also to be reflected in the way which nature restoration is planned and managed – one common nature directed by the public...... authorities. But nature restoration is far from being a neural undertaking. Just like any other type of heritage production it can be the source of dissonance – ‘our’ nature is not necessary ‘their’ nature. Often this dissonance is managed in ways, which are not particular sensitive to site......-specificity. As exemplified by the Skjern River Restoration Project (1999-2003), one interpretation of the landscape sometimes suppresses other valid interpretations neglecting its diverse history. However, evidence from Switzerland suggests that planning for the common good, in the case of nature restoration, does...

  17. NAKUPOVANJE NA SPLETU

    OpenAIRE

    Visenjak, Monika

    2013-01-01

    Nakupovanje na spletu je prihodnost poslovanja. Za podjetja pomeni manjše stroške, lažje prilagajanje tržnim pogojem. Hitreje lahko razvijajo odnose in analizirajo uporabnike, saj jim je dan dostop o nakupnih podatkih uporabnika. Za potrošnike je nakupovanje na spletu možnost hitrega, preprostega in učinkovitega nakupovanja od doma ali pisarne. Pomembno je, da se seznanijo z vsemi informacijami in pogoji spletnih trgovin, saj se lahko le tako izognejo nezadovoljstvu ob nakupu v spletni trgovi...

  18. Natural Philosophy

    OpenAIRE

    Blair, Ann M.

    2006-01-01

    Natural philosophy” is often used by European historians as an umbrella term to designate the study of nature before it can easily be identified with what we call “science” today, to avoid the modern and potentially anachronistic connotations of that term. But “natural philosophy” (and its equivalents in different languages) was also an actor's category, a term commonly used throughout the early modern period and typically defined quite broadly as the study of natural bodies. As the central ...

  19. Dissonant Nature

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2013-01-01

    Nature restoration is far from being a neural undertaking. Just like any other type of heritage production it can be the source of dissonance – ‘our’ nature is not necessary ‘their’ nature. Often this dissonance is managed in ways, which are not particular sensitive to site-specificity. As exempl...... and allows for multiple interpretations to coexist. Evidence can be found in the Re-naturalization of River Aire (2002-2015), a restoration project, which reveals approaches that could be labelled landscape architecture specific....

  20. Temporal naturalism

    Science.gov (United States)

    Smolin, Lee

    2015-11-01

    Two people may claim both to be naturalists, but have divergent conceptions of basic elements of the natural world which lead them to mean different things when they talk about laws of nature, or states, or the role of mathematics in physics. These disagreements do not much affect the ordinary practice of science which is about small subsystems of the universe, described or explained against a background, idealized to be fixed. But these issues become crucial when we consider including the whole universe within our system, for then there is no fixed background to reference observables to. I argue here that the key issue responsible for divergent versions of naturalism and divergent approaches to cosmology is the conception of time. One version, which I call temporal naturalism, holds that time, in the sense of the succession of present moments, is real, and that laws of nature evolve in that time. This is contrasted with timeless naturalism, which holds that laws are immutable and the present moment and its passage are illusions. I argue that temporal naturalism is empirically more adequate than the alternatives, because it offers testable explanations for puzzles its rivals cannot address, and is likely a better basis for solving major puzzles that presently face cosmology and physics. This essay also addresses the problem of qualia and experience within naturalism and argues that only temporal naturalism can make a place for qualia as intrinsic qualities of matter.

  1. Riso na epilepsia

    Directory of Open Access Journals (Sweden)

    Edymar Jardim

    1967-06-01

    Full Text Available São estudados três casos de síndrome convulsiva temporal, com manifestações concomitantes de riso na sua fase inicial. As características principais foram a imotivação e á incoercibilidade do riso. Esses sintomas desapareceram com o uso de anticonvulsivantes.

  2. Matematica Natural.

    Science.gov (United States)

    Lozano, Patricia; Medearis, Linda

    Matematica Natural (Natural Mathematics) is a mathematics curriculum for young children based on the assumption that they learn mathematics through concrete, real life, relevant experiences and that educational differences rather than cultural differences influence math achievement. The curriculum uses hands-on materials and activities to teach…

  3. Natural radiation

    International Nuclear Information System (INIS)

    Feliciano, Vanusa Maria Delage

    2016-01-01

    Cosmic radiation, as well as cosmogenic radiation, terrestrial radiation, radon and thorium are introduced in this chapter 3. The distribution of natural radiation sources is treated, where the percentage distribution of the contribution relative to exposure to radiation from natural and artificial sources is also included

  4. Framing nature

    NARCIS (Netherlands)

    Jansen, Peter

    2017-01-01

    This PhD thesis is about communication concerning nature in the Netherlands. The purpose of this exploratory study is to take both a theoretical and an empirical look at whether (implicit) religious elements play a role in this communication about nature in the Netherlands.

    In this PhD

  5. Natur formet

    DEFF Research Database (Denmark)

    Søberg, Martin

    2011-01-01

    Anmeldelse af Malene Hauxner, "Fra naturlig natur til SUPERNATUR – Europæisk landskabsarkitektur 1967-2007 set fra Danmark", Risskov: Ikaros Press, 2011.......Anmeldelse af Malene Hauxner, "Fra naturlig natur til SUPERNATUR – Europæisk landskabsarkitektur 1967-2007 set fra Danmark", Risskov: Ikaros Press, 2011....

  6. Possible impacts of the natural gas three-part tariff on the great industrial consumers over 500.000 m{sup 3}/month at the COMGAS distribution area; Possiveis impactos da tarifa trinomial de gas natural nos grandes consumidores industriais acima de 500.000 m{sup 3}/mes na area de concessao da COMGAS

    Energy Technology Data Exchange (ETDEWEB)

    Sant' Ana, Paulo Henrique de Mello; Jannuzzi, Gilberto de Martino; Bajay, Sergio Valdir [Universidade Estadual de Campinas, SP (Brazil)]. E-mails: phsantana@fem.unicamp.br; jannuzzi@fem.uncamp.br; bajay@fem.unicamp.br

    2006-07-01

    The problem of saturation in the natural gas distribution pipelines in Brazil is not urgent, but it's possible to notice the need of reinforcements in some extensions. Price regulation does not consider this problem yet, but it's already predicted the adoption of a three-part tariff considering a contracted capacity for some industrial consumers - industries that buy more than 500.000 m3/month in the COMGAS distribution area. Some industries, like potteries and glass makers, would probably not suffer strong impacts with the implementation of this three-part tariff, since the majority of their manufacturing processes are continuous. Others sectors would probably have negative impacts with the contracted capacity, like pulp and paper, metallurgy and textile industries. The way that industry will manage the contracted capacity is still unknown. Some possibilities are: considering natural gas as one of the variables in the productions' decision; having a 'Back-up' system when the consumption surpass the contracted capacity; switch fuels when total consumption is above 500.000 m{sup 3}/month, so that the company does not fit in the three-part tariff. The three-part tariff has not been published yet, but it's already necessary a sign to the market that this will occur in the near future, so that the companies involved can already create a strategy for the use of natural gas. This signal is already predicted in the Technical Paper number X of CSPE. (author)

  7. Sanitary Surveillance of natural latex male condoms commercialized in Rio de Janeiro, Brazil: analysis of volumetric capacity and burst pressure / Vigilância Sanitária de preservativos masculinos de látex natural comercializados na cidade do Rio de Janeiro, Brasil: análise da capacidade volumétrica e pressão de estouro

    Directory of Open Access Journals (Sweden)

    Janete Teixeira Duarte

    2014-08-01

    ária. Um dos principais ensaios para o controle de qualidade do preservativo masculino é o teste de insuflação, que avalia a resistência por meio da determinação da capacidade volumétrica e da pressão de estouro. Método: Foram avaliadas 20 marcas de preservativos masculinos, nacionais e importados, de oito fabricantes, comercializados na cidade do Rio de Janeiro, Brasil. Foram testados 200 unidades de preservativos por marca. Resultados: Todas as marcas atenderam aos critérios estabelecidos na Resolução da Diretoria Colegiada da Agên-cia Nacional de Vigilância Sanitária, Resolução nº RDC 62/2008, que permite até oito unidades não-conformes. No entanto, em 12 marcas foram observadas unidades não conformes. Conclusão: A partir de uma perspectiva da Vigilância Sanitária, uma unidade não conforme tem sérias implicações para a saúde pública.

  8. Observations on the natural history of the lizard Mabuya macrorhyncha Hoge (Scincidae in Queimada Grande Island, São Paulo, Brazil Observações sobre a história natural do lagarto Mabuya macrorhyncha Hoge (Scincidae na Ilha da Queimada Grande, São Paulo, Brasil

    Directory of Open Access Journals (Sweden)

    Davor Vrcibradic

    2005-12-01

    Full Text Available Data are presented on the on diet, thermal biology, microhabitat use, reproduction and helminth infection parameters of a population of Mabuya macrorhyncha hoge, 1946 inhabiting the small island of Queimada Grande, on the southern coast of São Paulo State. The lizards were collected on November 1997 (spring and on July 1998 (winter. Most lizards were perched above ground, mainly on herbaceous vegetation. Mean lizard body temperatures were significantly higher in spring (32.6 ± 1.9ºC than in winter (28.5 ± 2.4ºC, as were air temperatures. Mean litter size of females was 2.7 (range 2-3. The diet was composed of a diverse array of arthropods and some small fruits. Of the 19 lizards examined, 16 (84.2% harboured helminths. Three species of helminth (one acanthocephalan and two nematodes were found infecting the lizards. Compared to other M. macrorhyncha populations previously studied in mainland areas, the Queimada Grande population appears to be less strongly associated to bromeliads, to consume plant matter (fruits more frequently, and to have a poorer helminth fauna.Dados são apresentados referentes à dieta, biologia térmica, uso de microhabitats, reprodução e parâmetros de infecção por helmintos de uma população de Mabuya macrorhyncha Hoge, 1946 habitando a pequena ilha da Queimada Grande, na costa sul do Estado de São Paulo. Os lagartos foram coletados em novembro de 1997 (primavera e em julho de 1998 (inverno. A maioria dos lagartos foi encontrada empoleirada acima do solo, principalmente sobre vegetação herbácea. As temperaturas corpóreas médias dos lagartos foram significativamente mais altas na primavera (32,6 ± 1,9ºC do que no inverno (28,5 ± 2,4ºC, como ocorreu com as temperaturas do ar. O tamanho médio de ninhada das fêmeas foi de 2.7 (amplitude 2-3. A dieta foi composta por artrópodes variados e por alguns pequenos frutos. Dos 19 lagartos examinados, 16 (84.2% estavam infectados por helmintos. Três esp

  9. Development of gas-to-liquid (GTL) processes in the PETROBRAS: a joint process with university through the CTPETRO projects (National Brazilian Plan in Science and Technology for Petroleum and Natural Gas ); Desenvolvimento de processos GTL na PETROBRAS: um processo conjunto com a academia via projetos CTPETRO - Plano Nacional de Ciencia e Tecnologia de Petroleo e Gas Natural

    Energy Technology Data Exchange (ETDEWEB)

    Sousa-Aguiar, Eduardo Falabella; Sugaya, Marcos de Freitas [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas]. E-mail: falabella@cenpes.petrobras.com.br

    2002-07-01

    This paper discusses the importance of the conversion the natural gas into liquid fuels, the GTL (gas-to-liquid) process, for the Brazilian energetic matrix. The different routes of synthesis gas generation (CO + H2) from the methane are presented. The paper comments on the role played by PETROBRAS and her policy of GTL process development, by using a model jointly with various universities. The work also presents the preliminary results of catalysts development and the respective pilot scale supports, aiming a posterior evaluation in a GTL synthesis pilot plant.

  10. Interação comportamento de pastejo´dinâmica de tipos funcionais em pastagem natural na depressão central do Rio Grande do Sul Interaction between grazing behavior and functional type dynamics in native grassland in the central depression Region of Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Betina Raquel Cunha dos Santos

    2006-10-01

    Full Text Available Este estudo foi realizado com o objetivo de avaliar os comportamentos alimentar e espacial de bovinos em pastejo em função da dinâmica de tipos funcionais (TF em pastagem natural, definidos por meio da descrição de atributos morfológicos. Foram utilizadas novilhas em pastejo rotacionado, com oferta média de forragem de 12% (12 kg de MS/100 kg PV. O ritmo de atividade dos animais foi acompanhado durante o período de 12/02 a 27/02/2003 utilizando-se registradores automáticos Ethosys. Para a medição dos atributos, foram marcadas 30 unidades amostrais permanentes, compostas de cinco quadros contíguos de 0,20 x 0,20 m. Os resultados da descrição da comunidade indicaram um subconjunto ótimo de dois atributos (biomassa superior e biomassa lenhosa, os quais definiram oito TF, indicando congruência de 0,43 com a variável ambiental graus-dia. A evolução dos tempos de pastejo comprovou que, à medida que diminuem os TF preferidos, ocorre aumento nos tempos de pastejo. A caracterização da vegetação com base na definição de atributos, em comparação àquela realizada somente pela identificação das espécies presentes na área, facilitou a compreensão da resposta interativa vegetação ´ animal. Simultaneamente, à medida que a vegetação se alterou, os animais modularam seu comportamento ajustando seus ritmos de atividade, no tempo e no espaço, provocando continuamente impactos diferenciais na vegetação, que evolui com o tempo.This study aimed to describe the feeding and spatial behavior of beef heifers under rotational stocking, in response to the dynamics of the morphological functional types (TFs in natural grassland. Stocking rate was adjusted to keep an average of 12% (12 kg DM/100 kg BW of forage allowance. Animal activity was registered from 12 to 27 February 2003 using the Ethosys automatic device. Thirty permanent field sampling units comprised by five adjacent 0.20 x 0.20 m squares were used to determine pasture

  11. Remoção de metais pesados de efluentes aquosos pela zeólita natural escolecita - influência da temperatura e do pH na adsorção em sistemas monoelementares Heavy metals removal from wastewater by the natural zeolite scolecite - temperature and pH influence in single-metal solutions

    Directory of Open Access Journals (Sweden)

    Ricardo Sarti Jimenez

    2004-10-01

    Full Text Available Cation exchange capabilities of a Brazilian natural zeolite, identified as scolecite, were evaluated for application in wastewater control. We investigated the process of sorption of chromium(III, nickel(II, cadmium(II and manganese(II in synthetic aqueous effluents, including adsorption isotherms of single-metal solutions. The natural zeolite showed the ability to take up the tested heavy metals in the order Cr(III > Cd(II > Ni(II > Mn(II, and this could be related to the valence and the hydration radius of the metal cations. The influence of temperature (25, 40 and 60 ºC and initial pH value (from 4 to 6 was also evaluated. It was found that the adsorption increased substantially when the temperature was raised to 60 ºC and that maximum adsorption capacity was observed at pH 6. These results demonstrate that scolecite can be used for removal of heavy metals from aqueous effluents, under optimized conditions.

  12. Natural radiation; A radiacao natural

    Energy Technology Data Exchange (ETDEWEB)

    Feliciano, Vanusa Maria Delage

    2016-07-01

    Cosmic radiation, as well as cosmogenic radiation, terrestrial radiation, radon and thorium are introduced in this chapter 3. The distribution of natural radiation sources is treated, where the percentage distribution of the contribution relative to exposure to radiation from natural and artificial sources is also included.

  13. Synthesis of Ag or Pt Nanoparticles by Hydrolysis of Either Ag2Na or PtNa

    Directory of Open Access Journals (Sweden)

    Huabin Wang

    2008-01-01

    Full Text Available Ag and Pt nanoparticles have successfully been synthesized by hydrolysis of either Ag2Na or PtNa at room temperature. The oxidation of sodium in the Pt-Na pellets was much faster than that in the Ag-Na pellets since Pt is a catalyst for H2O formation reaction from hydrogen and oxygen at room temperature. The hydrolysis byproduct, NaOH, has a high solubility and easily is removed. This method offers a simple method of preparing transition metal nanoparticles. The Ag and Pt nanoparticles prepared by this method were crystalline in nature, and spherical in shape with a mean size of around 10 nm.

  14. Natural Communities

    Data.gov (United States)

    Kansas Data Access and Support Center — This dataset shows the locations of known tracts of high quality natural communities in Kansas, generalized to the PLSS section. It is not a compehensive dataset of...

  15. Sciences & Nature

    African Journals Online (AJOL)

    AFRICAN JOURNALS ONLINE (AJOL) · Journals · Advanced Search · USING AJOL ... Sciences & Nature, the Scientific Journal edited by the University of ... Subjects covered include agronomy, sciences of the earth, environment, biological, ...

  16. Pluralising Nature

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2017-01-01

    suppress other valid perceptions, in conflict with the need for different groups of people to be able to identify with the same territory. However, planning for the common good, in the case of nature restoration, does not necessarily mean planning for one common nature. Understanding and working......Denmark is recognised for its democratic approach to planning, and for the idea of planning for the common good. This interest in the common good and in common values also seems to be reflected in the way that the restoration of nature is planned and managed, suggesting that there is one common...... “nature” that everyone can agree on. But nature restoration is far from being an unproblematic undertaking. As with any other type of heritage production, it can be the source of dissonance. As exemplified by the Skjern River Restoration Project, one perception of a landscape and its value as “nature” can...

  17. Writing Nature

    Directory of Open Access Journals (Sweden)

    Kristin Asdal

    2014-06-01

    Full Text Available This special issue of the Nordic Journal of Science and Technology Studies is interested in how nature, in different versions and forms, is invited into our studies, analyses, and stories. How is it that we “write nature”? How is it that we provide space for, and actually describe the actors, agents, or surroundings, in our stories and analyses? The articles in the issue each deal with different understandings of both the practices of writing and the introduction of various natures into these. In this introduction to the issue the editors engage with actor-network theory as a material semiotic resource for writing nature. We propose to foreground actor-network theory as a writing tool, at the expense of actor-network theory as a distinct vocabulary. In doing this and pointing out the semiotic origins to material-semiotics we also want to problematize a clear-cut material approach to writing nature.

  18. God, design, and naturalism: Implications of methodological naturalism in science for science-religion relation

    OpenAIRE

    Piotr Bylica; Dariusz Sagan

    2015-01-01

    The aim of this paper is to analyze the implications flowing from adopting methodological naturalism in science, with special emphasis on the relation between science and religion. Methodological naturalism, denying supernatural and teleological explanations, influences the content of scientific theories, and in practice leads to vision of science as compatible with ontological naturalism and in opposition to theism. Ontological naturalism in turn justifies the acceptance of methodological na...

  19. Natural aphrodisiacs.

    Science.gov (United States)

    Shamloul, Rany

    2010-01-01

    The search for a remedy or a prescription that can enhance sexual function and/or treat male erectile dysfunction has been an obsession throughout known history. Whether it was an Eastern civilization or a Western one, religious or atheist, man's aspiration for a better or best "manhood" has been a history-time goal. This review will discuss the current research done on the most popular natural aphrodisiacs and examine the weight of evidence to support or discourage the use of any of these substances to enhance sexual desire and/or function. Review of the current evidence on the use of natural substances as aphrodisiacs. Efficacy of natural aphrodisiacs in enhancing sexual function in men and women. There is little evidence from literature to recommend the usage of natural aphrodisiacs for the enhancement of sexual desire and/or performance. Data on yohimbine's efficacy does not support the wide use of the drug, which has only mild effects in the treatment of psychogenic ED. Although there's a positive trend towards recommending ginseng as an effective aphrodisiac, however, more in depth studies involving large number of subjects and its mechanism of action are needed before definite conclusions could be reached. Data on the use of natural aphrodisiacs in women is limited. The current body of objective evidence does not support the use of any natural aphrodisiac as an effective treatment for male or female sexual dysfunctions. Potent men and men with ED will continue the search for natural aphrodisiacs despite the current disappointing data on their effectiveness. Care should be taken regarding the fraud addition of sildenafil analogues to natural aphrodisiacs.

  20. Atletismo na escola : realidade?

    OpenAIRE

    Sampaio, Alessandro Oliveira de

    2012-01-01

    O correr, saltar, lançar e arremessar são elementos básicos do atletismo, sendo fundamentais para o ser humano, devido ao favorecimento do desenvolvimento físico e motor. Sendo um dos conteúdos principais do desporto e da educação física escolar, foi realizado um estudo relacionado à prática do atletismo na escola, na qual o objetivo desta pesquisa foi verificar se entre os professores de educação física da rede pública de ensino fundamental de 5ª a 8ª séries, da cidade satélite de Samambaia ...

  1. Os conhecimentos alternativos e científicos na área de ciências naturais: uma revisão a partir da literatura internacional Scientific and alternative knowledge in the field of natural sciences: a review of the international literature

    Directory of Open Access Journals (Sweden)

    Darcy Ribeiro de Castro

    2013-01-01

    Full Text Available Este texto trata dos aspectos teóricos dos conhecimentos alternativos e científicos com crianças em faixa etária entre sete e 11 anos de idade, na área de Ciências Naturais. Deriva de uma dissertação de mestrado que estudou os de conceitos de microrganismos e funções vitais de animais e plantas numa escola cooperativista da cidade de Central, estado da Bahia, em 2009-2010. Neste estudo, organizamos uma síntese das concepções espontâneas e científicas, baseada essencialmente na literatura internacional, para fins de contribuir com a análise de conhecimentos das crianças da referida escola. Os principais aspectos estudados sobre os microrganismos foram a estrutura, tamanho e importância; enquanto, para os animais e plantas, foram consideradas, no estudo, as funções de nutrição, trocas gasosas, respiração e transporte, enfatizando as funções digestórias no ser humano. Discutimos as implicações desse referencial para o planejamento de um ensino para as séries iniciais, destacando o conhecimento biológico da criança.This text deals with the theoretical aspects of alternative and scientific knowledge with children between seven and 11 years of age, in the area of natural sciences. It derives from a dissertation that studied the concepts of microorganisms and vital functions of animals and plants in a cooperative school in Central town, in 2009-2010. In this study, we organize a synthesis of spontaneous and scientific conceptions, based essentially on international literature for the purpose of contributing to the analysis of children's knowledge of that school in this area. The main aspects studied about microorganisms were their structure, size and importance; While, for the animals and plants the functions of nutrition, gas exchange, respiration and transportation were considered, emphasizing the digestive functions in humans. There is a discussion of the implications of this benchmark work for the planning of

  2. Preparing for NA4

    CERN Multimedia

    CERN PhotoLab

    1977-01-01

    Here, in one of the EF workshop, Albert Duchêne works on a pretty piece of mechanics. A few others await to be attended on the left. There are indications that the pipes were meant to house the carbon target (subdivided in eight sections) to be installed inside the toroid magnet of the NA4 experiment. The external strips were designed to possibly correct the magnetic field (???).

  3. Financial methodology for Brazilian market of small producers of oil and natural gas, based on Canadian and North American experiences in reserves quantification, evaluation and certification; Metodologia de financeiamento para pequenos produtores do mercado brasileiro de petroleo e gas natural, baseado nas experiencias canadense e americana na quantificacao, valoracao e certificacao de reservas

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Enrico Brunno Zipoli de Sousa e [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Programa de Pos-Graduacao em Geologia; Coelho, Jose Mario [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Dept. de Minas

    2008-07-01

    ANP (National Agency of Petroleum, Natural gas and Biofuels), through auctions of exploratory blocks in the subsequent years from the break of the monopoly of PETROBRAS with the Law 9.478 of 1997, had important role in the opening of the section and in the attainment of the self-sufficiency of petroleum. However the petroleum production in ripe and marginal fields were left off, since the initial interest in the first rounds was to attract the major companies. - International Oil Companies (IOC) - when ANP granted great blocks offshore. Ripe fields are defined as fields in phase of irreversible declination and marginal fields are also defined as economical concept, certain for business decision and external economical factors (price of the oil, etc.). Canada and USA, worldwide leaders in the market of petroleum and gas, possess politics that benefit and maintain the small companies protected of the competition of INOC's by assuring small companies finance through the guarantee of proved reserves of oil. This paper assemble Canadian and American experiences in regulation for small companies investments and compares it with Brazilian financing types, which is restricted due to the Brazilian finance agent's despite about oil and gas activity. (author)

  4. Emancipating Nature

    DEFF Research Database (Denmark)

    Munk, Anders Kristian

    2012-01-01

    The issue of riverine flooding in the UK is closely tied up with computer simulations. Arguably, these modelling practices are ripe with the anticipation of nature. They aspire to pre-empt it, hence expect it to be ‘out there’, and ultimately work through formalized distillations of it – hydrodyn......The issue of riverine flooding in the UK is closely tied up with computer simulations. Arguably, these modelling practices are ripe with the anticipation of nature. They aspire to pre-empt it, hence expect it to be ‘out there’, and ultimately work through formalized distillations...... of it – hydrodynamic equations – which have their own anticipations and place their own demands on their modellers. Through the experience of a flood modelling apprenticeship I argue that the taking-place of such anticipations paradoxically relies on the birth of a hybrid, the model-modeller, and thus on a nature...

  5. Aspectos clínicos, epidemiológicos e patológicos da infecção natural em bovinos por Trypanosoma vivax na Paraíba Clinical, epidemiological and pathological signs of natural infection in cattle by Trypanosoma vivax in Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Jael S. Batista

    2008-01-01

    Full Text Available Descrevem-se dois surtos de tripanossomíase por Trypanosoma vivax em bovinos, ocorridos em dois estabelecimentos do alto sertão da Paraíba. Os sinais clínicos, a patologia e a epidemiologia da doença foram estudados no período de maio de 2005 a novembro de 2006.T. vivax foi identificado em esfregaços da capa leucocitária e mediante a reação em cadeia da polimerase (PCR. Os animais afetados apresentaram anorexia, depressão, febre, anemia, perda de peso, redução da produção leiteira, cegueira transitória, aborto e sinais nervosos caracterizados por incoordenação motora, salivação, opistótono, nistagno, tetania e bruxismo. Todos os animais que apresentaram sintomatologia nervosa morreram. As alterações macroscópicas observadas em um bovino submetido à necropsia foram aumento de volume dos linfonodos, atrofia serosa dos depósitos de gordura, aumento de volume do baço com evidência da polpa branca, hidropericárdio, além de petéquias e equimoses no epicárdio. Histologicamente havia meningoencefalite. O controle da doença na propriedade com tratamento específico dos casos clínicos com aceturato de diminazene foi eficiente, pois após o tratamento não se verificou mais a presença do parasita em esfregaços sanguíneos nem evidência clínica da enfermidade em até 2 meses após o início do surto. Os fatores epidemiológicos favoráveis à ocorrência dos surtos foram a abundância de vetores mecânicos, como tabanídeos e Stomozys spp., e a entrada, no rebanho, de animais oriundos de propriedades onde ocorreu a doença em questão. Sugere-se que o semi-árido do Nordeste, devido a períodos prolongados de secas e altas temperaturas, é região de instabilidade enzoótica para a tripanossomíase, em conseqüência, provavelmente, ao ambiente desfavorável para o desenvolvimento de vetores durante a maior parte do ano.Two outbreaks of trypanosomiasis by Trypanosoma vivax, reported in cattle, occurred on two farms

  6. The CERES / NA45 experiment

    CERN Multimedia

    Laurent Guiraud

    2000-01-01

    Ceres is one of the second generation heavy ion experiments at CERN's SPS. It is dedicated to the study of electron-positron pairs in relativistic nuclear collisions. NA45 is one of the seven experiments (NA44, NA45, NA49, NA50, NA52, WA97/NA57 and WA98) involved in CERN's Heavy Ion programme which provided evidence for the existence of a new state of matter, the quark-gluon plasma. In this state, quarks, instead of being bound up into more complex particles such as protons and neutrons, are liberated and roam freely. Theory predicts that this state must have existed at about 10 microseconds after the Big Bang, before the formation of matter as we know it today.

  7. Natural aerodynamics

    CERN Document Server

    Scorer, R S

    1958-01-01

    Natural Aerodynamics focuses on the mathematics of any problem in air motion.This book discusses the general form of the law of fluid motion, relationship between pressure and wind, production of vortex filaments, and conduction of vorticity by viscosity. The flow at moderate Reynolds numbers, turbulence in a stably stratified fluid, natural exploitation of atmospheric thermals, and plumes in turbulent crosswinds are also elaborated. This text likewise considers the waves produced by thermals, transformation of thin layer clouds, method of small perturbations, and dangers of extra-polation.Thi

  8. Provincialising Nature

    DEFF Research Database (Denmark)

    Provincialising Nature: Multidisciplinary Approaches to the Politics of the Environment in Latin America offers a timely analysis of some of the crucial challenges, contradictions and promises within current environmental discourses and practices in the region. This book shows both challenging...... scenarios and original perspectives that have emerged in Latin America in relation to the globally urgent issues of climate change and the environmental crisis. Two interconnected analytical frameworks guide the discussions in the book: the relationship between nature, knowledge and identity and their role...

  9. Qualidade da pastagem nativa obtida por diferentes métodos de amostragem e em diferentes solos na Apa do Ibirapuitã, Brasil Quality of natural pasture evaluated with different methods and soils at the Apa of Ibirapuitã, Brazil

    Directory of Open Access Journals (Sweden)

    Vicente Celestino Pires Silveira

    2005-06-01

    Full Text Available O estado do Rio Grande do Sul apresenta ecossistemas heterogêneos, devido ao grande número de tipos de solo e à variação em altitude e clima, que se reflete na diversidade da composição florística das diferentes comunidades vegetais. A Área de Proteção Ambiental do Ibirapuitã (APA do Ibirapuitã, é a única unidade de conservação federal, representante do bioma campos sulinos no Brasil. O objetivo deste trabalho foi obter informação sobre a qualidade do campo natural oriundo de três tipos de solos predominantes na APA do Ibirapuitã: Basalto superficial, Basalto profundo e Arenito obtidos por três formas de amostragem: Corte de emparelhamento, Simulação de pastejo através de coleta manual e Corte total acima da fração mantilho. Os dados foram coletados mensalmente, no período de outubro/2001 a setembro/2003. A pastagem nativa no solo de Basalto superficial apresenta forragem com qualidade nutricional superior quando comparado ao Basalto profundo e ao Arenito, comprovada pelas diferentes análises de qualidade realizadas. O método de coleta de amostras de forragem de pastagem nativa somente não influencia os resultados da análise de Fibra em Detergente Neutro. Os resultados indicam a simulação de pastejo como um método adequado de amostragem para avaliação da qualidade da pastagem nativa, devido à sua efetividade e facilidade de coleta.Heterogeneous ecosystems are found in the state of Rio Grande do Sul as a consequence of the great number of soil types and variation in altitude and climate. These conditions reflect on the great variety of flora present in the grassland communities. The Area of Environmental Protection of the Ibirapuitã (APA of Ibirapuitã is the only conservation unit under federal jurisdiction representative of the Campos bioma in Brazil. The objective of this work was to obtain information about the quality of the natural pasture on three types of soils in APA of Ibirapuitã: Superficial

  10. 43. Calmodulin regulating calcium sensitivity of Na channels

    Directory of Open Access Journals (Sweden)

    R. Vegiraju

    2016-07-01

    Full Text Available By extrapolating information from existing research and observing previous assumptions regarding the structure of the Na Channel, this experiment was conducted under the hypothesis that the Na Channel is in part regulated by the calmodulin protein, as a result proving calcium sensitivity of the Na Channel. Furthermore, we assume that there is a one to one stoichiometry between the Na Channel and the Calmodulin. There has been extensive research into the functionality and structure of sodium ion channels (Na channels, as several diseases are associated with the lack of regulation of sodium ions, that is caused by the disfunction of these Na channels. However, one highly controversial matter in the field is the importance of the protein calmodulin (CaM and calcium in Na channel function. Calmodulin is a protein that is well known for its role as a calcium binding messenger protein, and that association is believed to play an indirect role in regulating the Na channel through the Na channel’s supposed calcium sensitivity. While there are proponents for both sides, there has been relatively little research that provides strong evidence for either case. In this experiment, the effect of calmodulin on NaV 1.5 is tested by preparing a set of cardiac cells (of the human specie with the NaV 1.5 C-Termini and CaM protein, which were then to be placed in solutions with varying concentrations of calcium. We took special care to test multiple concentrations of calcium, as previous studies have tested very low concentrations, with Manu Ben-Johny’s team from the John Hopkins laboratory in particular testing up to a meager 50 micromolar, despite producing a well-respected paper (By comparison, the average Na channel can naturally sustain a concentration of almost 1-2 millimolar and on some occasions, reaching even higher concentrations. After using light scattering and observing the signals given off by the calcium interacting with these Nav1.5/Ca

  11. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 3. Nature Watch Diversity of Bats. G Marimuthu. Feature Article Volume 1 Issue 3 March 1996 pp 103-110. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/001/03/0103-0110. Author Affiliations.

  12. Nature's Palette

    Science.gov (United States)

    McBride, Brooke B.; Brewer, Carol A.

    2010-01-01

    Flower petals, acorn hats, exoskeletons of beetles, and lichens are just a few of the objects students may find in a surprising array of vivid colors. These tiny examples from nature's palette can be discovered in a school yard, a park, or even along the edges of a paved sidewalk...it simply takes careful observation! This article describes a…

  13. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 9; Issue 9. Nature Watch - Coral Reefs and their Fauna: An Underwater Fantasyland. Anuradha Bhat. Feature Article Volume 9 Issue 9 September 2004 pp 62-73. Fulltext. Click here to view fulltext PDF. Permanent link:

  14. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 20; Issue 3. Nature Watch: Symbiosis in Coastal Marine Communities. Neelam Pereira. Feature Article Volume 20 Issue 3 March 2015 pp 245-253. Fulltext. Click here to view fulltext PDF. Permanent link:

  15. Nature Watch

    Indian Academy of Sciences (India)

    ... Lecture Workshops · Refresher Courses · Symposia · Live Streaming. Home; Journals; Resonance – Journal of Science Education; Volume 3; Issue 5. Nature Watch - Thinking Like a Tahr: When Males and Females go their Separate Ways. M D Madhusudan. Feature Article Volume 3 Issue 5 May 1998 pp 43-47 ...

  16. Natural Propositions

    DEFF Research Database (Denmark)

    Stjernfelt, Frederik

    Preface -- Introduction -- The generality of signs -- Dicisigns -- Some consequences of the dicisign doctrine -- Dicisigns and cognition -- Natural propositions--the evolution of semiotic self-control -- Dicisigns beyond language -- Operational and optimal iconicity in Peirce's diagrammatology...... -- Cows, red cows, and red herrings -- Corollarial and theorematic experiments with diagrams -- Strategies of research: Peirce's enlightenment maxims -- Perspective -- References -- Index....

  17. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 6; Issue 7. Nature Watch - Singapore's Jurong BirdPark: A Study Model. Abraham Verghese. Feature Article Volume 6 Issue 7 July 2001 pp 74-88. Fulltext. Click here to view fulltext PDF. Permanent link:

  18. Kritikkens natur

    DEFF Research Database (Denmark)

    Schatz-Jakobsen, Claus

    1999-01-01

    Artiklen introducerer det nye forskningsfelt inden for samtænkning af litteratur, kultur og natur, den såkaldt økologiske kritik, og kaster et kritisk blik på  dens brug af romantisk litteratur som proto-økologisk kanon....

  19. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 4; Issue 7. Nature Watch - The Odyssey of the Olive Ridley. Kartik Shanker. Feature Article Volume 4 Issue 7 July 1999 pp 68-78. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/004/07/0068-0078 ...

  20. Nature Watch

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 8. Nature Watch - Secrets of the Shieldtails. Kartik Shanker. Feature Article Volume 1 Issue 8 August 1996 pp 64-70. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/001/08/0064-0070 ...

  1. Nature Watch

    Indian Academy of Sciences (India)

    2016-08-26

    Aug 26, 2016 ... ... 20; Issue 1. Nature Watch: A Tale of Two Turtles. V Deepak. Feature Article Volume 20 Issue 1 January 2015 pp 47-54. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/020/01/0047-0054. Keywords. Ecology; endemic; India; turtles; tortoises; Western Ghats.

  2. Envolvimento pulmonar na polimiosite

    Directory of Open Access Journals (Sweden)

    Direndra Hasmucrai

    2010-07-01

    Full Text Available Resumo: Introdução: A polimiosite (PM e a dermatomiosite são classificadas como miopatias inflamatórias idiopáticas. O envolvimento pulmonar por PM é pouco frequente, estando descrito na literatura em cerca de 10% de casos.Os autores apresentam um caso de uma mulher de 75 anos, com queixas de febre, perda ponderal, artralgias, mialgias e diminuição simétrica e proximal da força muscular com impotência funcional dos membros superiores e inferiores, com início um mês antes do internamento. Apresentava infiltrados pulmonares na telerradiografia de tórax. Após estudo exaustivo estabeleceu-se o diagnóstico de envolvimento pulmonar na forma de pneumonia organizativa por PM. Efectuou-se corticoterapia e terapêutica com micofenolato com melhoria clínica, analítica e radiológica. Conclusão: Neste caso, foi a alteração na telerradiografia de tórax numa doente sem sintomatologia respiratória que levou ao estudo exaustivo até ao diagnóstico de PM, realçando mais uma vez a importância da telerradiografia no rastreio de patologias de outros foros. Abstract: Introduction: Polymyositis and dermatomyositis are classified as idiopathic inflammatory myopathies. Interstitial lung disease is rare and is described in the literature in about 10% of cases.The authors describes a case of 75 year old woman presenting with one month evolution of fever, weight loss, arthralgia, myalgia and symmetric and proximal muscle weakness of upper and lower limbs. Nonspecific interstitial changes was found in chest X-ray. After exhaustive study, the diagnosis of pulmonary envolvement in the form of organizing pneumonia by polymyositis, was established. Glucocorticoids and mycophenolate were prescribed with good clinical, analytical and radiological outcome. Conclusion: In this case, it was the changes in the chest X-ray in a patient without respiratory symptomatology, that conducted to exhaustive study to polymyositis diagnosis, enhancing once again the

  3. Natural Radioactivity in Bananas

    Science.gov (United States)

    Zagatto, V. A. B.; Medina, N. H.; Okuno, E.; Umisedo, N. K.

    2008-08-01

    The content of 40K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, São Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil without fertilizer for comparison. We have used the gamma-ray spectroscopy technique with a NaI(T1) crystal inside a 12 cm thick lead shield to detect the gamma-radiation. The results indicate that only part of the available potassium is absorbed by the plant, which is mainly concentrated in the banana peel.

  4. Natural Radioactivity in Bananas

    International Nuclear Information System (INIS)

    Zagatto, V. A. B.; Medina, N. H.; Okuno, E.; Umisedo, N. K.

    2008-01-01

    The content of 40 K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, Sao Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil without fertilizer for comparison. We have used the gamma-ray spectroscopy technique with a NaI(T1) crystal inside a 12 cm thick lead shield to detect the gamma-radiation. The results indicate that only part of the available potassium is absorbed by the plant, which is mainly concentrated in the banana peel

  5. Comprometimento pulmonar na leptospirose

    Directory of Open Access Journals (Sweden)

    Jorge Eduardo Manhães de Carvalho

    1992-03-01

    Full Text Available Em 23 pacientes com leptospirose apresentando comprometimento pulmonar, internados no Hospital Universitário Antônio Pedro da XJFF, Niterói, hemoptise e hemoptóicos foram observados em 21,7% e 30,4%, respectivajnente. Gasometria arterial revelou hipoxemia e hipocapnia na maioria dos casos. Radiografia de tórax em 15 pacientes mostrou comprometimento alveolar em 60%, comprometimento intersticial-reticular em 6%, padrão misto (alveolar e intersticial em20%e ausência de alterações radiológicas em 14%. A necrópsiade 13 pacientes mostrou edema, congestão e hemorragia nos pulmões em 100% dos casos. A hemorragia foi focal em 46% e difusa em 54% dos casos. Houve formação de membrana hialina em 30% e trombos de fibrina em 46% dos pulmões estudados, o que estabelece o diagnóstico da coagulação intravascular disseminada e a ocorrência da síndrome de angústia respiratória na leptospirose.

  6. Measurement of exchangeable sodium: 22Na or 24Na

    International Nuclear Information System (INIS)

    Smith, T.; Edmonds, C.J.

    1987-01-01

    A case is made for the use of 22 Na in low activities in preference to 24 Na for routine diagnostic estimation of exchangeable sodium, and is based chiefly on considerations of availability, cost and radiation dosimetry. A method in which only 37 kBq (1 μCi) 22 Na is administered orally is shown to be sufficiently accurate and to possess distinct advantages in terms of cost and convenience with a committed radiation dose no greater than that for a measurement using 24 Na. (author)

  7. Planejamento de redes logísticas: um estudo de caso na indústria petroquímica brasileira.

    Directory of Open Access Journals (Sweden)

    Luiz Felipe de Medeiros Frias

    2013-08-01

    Full Text Available O planejamento de redes logísticas emerge como decisão estratégica a ser tomada na busca da manutenção da competitividade empresarial. O presente estudo desenvolveu um modelo de Programação Não Linear Inteira Mista contemplando os principais componentes de custo envolvidos no processo de planejamento de redes associados à realidade brasileira: transportes, estoques e tributos. O modelo foi testado na empresa Nova Braskem. Foram realizadas análises de sensibilidade em que se apreciaram os principais trade-offs relativos às premissas assumidas. Constatou-se que, no caso estudado, o modelo desenvolvido proporciona economia nos custos tributários e nos custos logísticos de transporte, e, consequentemente, nos custos totais. Mais precisamente, os resultados apontam que, apesar da importância dos custos de transporte ante os demais, o aspecto fiscal se apresentou como o principal potencial de retorno financeiro a ser perseguido, e, dessa maneira, foi possível demonstrar o valor associado à questão dentro da atmosfera empresarial brasileira. Para o design ótimo de uma rede, confirma-se, portanto, a tese de que não é plausível a dissociação entre logística e planejamento tributário. Ademais, dada a natureza do estudo de caso, é factível a consideração do planejamento de redes logísticas como um importante ferramental capaz de subsidiar a busca de sinergias em operações de fusões e aquisições de empresas. Há, por exemplo, diversos outros casos recentes no cenário empresarial brasileiro, como a fusão entre Sadia e Perdigão e entre outras empresas do agronegócio. Para dar continuidade aos estudos dos trade-offs entre logística e os aspectos tributários brasileiros, sugere-se a inclusão de novos tributos (PIS, Cofins etc. e a concessão de benefícios fiscais na modelagem de redes logísticas futuras. Especificamente com relação ao estudo de caso, observa-se que a forma de agregação dos mercados consumidores

  8. Provincialising Nature

    DEFF Research Database (Denmark)

    Provincialising Nature: Multidisciplinary Approaches to the Politics of the Environment in Latin America offers a timely analysis of some of the crucial challenges, contradictions and promises within current environmental discourses and practices in the region. This book shows both challenging...... scenarios and original perspectives that have emerged in Latin America in relation to the globally urgent issues of climate change and the environmental crisis. Two interconnected analytical frameworks guide the discussions in the book: the relationship between nature, knowledge and identity and their role...... in understanding recent and current practices of climate change and environmental policy. The different chapters in this volume contribute to this debate by offering multidisciplinary perspectives on particular aspects of these two frameworks and through a multidirectional outlook that links the local, national...

  9. Unbounded Naturalism

    Directory of Open Access Journals (Sweden)

    Andrew Taggart

    2008-10-01

    Full Text Available nbsp;font face="Times, serif"font size="3"In the Anglo-American reception of John McDowellrsquo;s /font/fontfont face="Times, serif"font size="3"emMind and World/em/font/fontfont face="Times, serif"font size="3", there has been little attention paid to the developmental aspect of his lsquo;partially re-enchantedrsquo; naturalism. In lsquo;Naturalism Unboundedrsquo;, I argue that McDowellrsquo;s story of our normal upbringing (/font/fontfont face="Times, serif"font size="3"emBildung/em/font/fontfont face="Times, serif"font size="3" presents problems for his claim that we have a lsquo;standing obligationrsquo; to reflect on our perceptual experiences. I follow this critique up with a Hegelian-inspired attempt to retain and revise the vital points he makes about experience./font/font

  10. Natural games

    International Nuclear Information System (INIS)

    Anttila, Jani; Annila, Arto

    2011-01-01

    A course of a game is formulated as a physical process that will consume free energy in the least time. Accordingly, the rate of entropy increase is the payoff function that will subsume all forms of free energy that motivate diverse decisions. Also other concepts of game theory are related to their profound physical counterparts. When the physical portrayal of behavior is mathematically analyzed, the course of a game is found to be inherently unpredictable because each move affects motives in the future. Despite the non-holonomic character of the natural process, the objective of consuming free energy in the least time will direct an extensive-form game toward a Lyapunov-stable point that satisfies the minimax theorem. -- Highlights: → Behavior in the context of game theory is described as a natural process. → The rate of entropy increase, derived from statistical physics of open systems, is identified as the payoff function. → Entropy as the payoff function also clarifies motives of collaboration and subjective nature of decision making. → Evolutionary equation of motion that accounts for the course of a game is inherently unpredictable.

  11. Heparinoides naturais isolados de rodofíceas (Halymenia sp. arribadas na costa cearense - doi: 10.4025/actascibiolsci.v32i3.6282 Natural heparinoids isolated from Halymenia sp. (Rhodophyceaes delivery on the Ceará coast - doi: 10.4025/actascibiolsci.v32i3.6282

    Directory of Open Access Journals (Sweden)

    Wladimir Ronald Lobo Farias

    2010-09-01

    Full Text Available A crescente carência de heparina (HEP motiva a busca por fontes alternativas de novos anticoagulantes naturais. Objetivou-se avaliar a atividade anticoagulante dos polissacarídeos sulfatados (PS isolados de uma rodofícea do gênero Halymenia, nativa do litoral cearense, Brasil. Os PS totais foram obtidos por digestões consecutivas com papaína em tampão acetato de sódio 0,1 M (pH 5,0, contendo cisteína 5 mM e EDTA 5 mM, seguidas por cromatografia de troca iônica em coluna de DEAE-celulose. As frações obtidas foram concentradas por liofilização e submetidas à eletroforese em gel de agarose a 0,5%. Os ensaios anticoagulantes foram realizados pelo tempo de tromboplastina parcial ativada (TTPA, usando-se plasma de coelho e uma curva padrão de HEP (100 UI MG-1. As extrações (53,96% mostraram diferenças marcantes durante o fracionamento e no grau de resolução dos PS. A espécie apresentou PS com atividade anticoagulante superior a HEP. O TTPA das frações modificou-se acentuadamente entre as extrações, expressando-se de maneira dose-dependente e sofrendo um acréscimo de 110,40 (1ª extração para 143,10 UI MG-1 (3ª extração. Os resultados sugerem que a atividade anticoagulante dos PS isolados de Halymenia sp. foi promovida pela inibição da via intrínseca e/ou comum da cascata de coagulação. As modificações no TTPA possivelmente serão elucidadas pelos mecanismos de ação envolvidos na coagulação e caracterização estrutural desses compostos. Portanto, a rodofícea Halymenia sp. é uma boa fonte de heparinoides e sugerem-se estudos relacionados ao cultivo da espécie, em proteção aos bancos de algas.The increasing demand for heparin (HEP has led to a search for alternative sources of natural anticoagulants. This study aimed to evaluate the anticoagulant activity of sulfated polysaccharides (SP isolated from a Halymenia rhodophyceae genus native to the coast of Ceará, Brazil. Total SP were obtained by consecutive

  12. The NA27 trigger

    International Nuclear Information System (INIS)

    Bizzarri, R.; Di Capua, E.; Falciano, S.; Iori, M.; Marel, G.; Piredda, G.; Zanello, L.; Haupt, L.; Hellman, S.; Holmgren, S.O.; Johansson, K.E.

    1985-05-01

    We have designed and implemented a minimum bias trigger together with a fiducial volume trigger for the experiment NA27, performed at the CERN SPS. A total of more than 3 million bubble chamber pictures have been taken with a triggered cross section smaller than 75% of the total inelastic cross section. Events containing charm particles were triggered with an efficiency of 98 +2 sub(-3)%. With the fiducial volume trigger, the probability for a picture to contain an interaction in the visible hydrogen increased from 47.3% to 59.5%, reducing film cost and processing effort with about 20%. The improvement in data taking rate is shown to be negligible. (author)

  13. Na Cauda do Cometa

    Science.gov (United States)

    Voelzke, M. R.

    2009-01-01

    Quando viam um cometa, os antigos gregos imaginavam uma estrela com uma vasta cabeleira. Não à toa, a palavra deriva do termo koma, que significa cabelo. Constituídos por fragmentos de gelo e gases, os cometas possuem um núcleo sólido, que pode ter vários quilômetros de diâmetro, e uma cauda que sempre aponta na direção contrária ao Sol, devido aos ventos solares. Graças à aparência de pontos luminosos em movimento (ao contrário de outros astros, que parecem estáticos), esses corpos celestes foram interpretados por diferentes povos com muito misticismo, inspirando mitos tanto de boas-novas como de maus presságios. Conheça algumas dessas histórias:

  14. NA48 prototype calorimeter

    CERN Multimedia

    1990-01-01

    This is a calorimeter, a detector which measures the energy of particles. When in use, it is filled with liquid krypton at -152°C. Electrons and photons passing through interact with the krypton, creating a shower of charged particles which are collected on the copper ribbons. The ribbons are aligned to an accuracy of a tenth of a millimetre. The folding at each end allows them to be kept absolutely flat. Each shower of particles also creates a signal in scintillating material embedded in the support disks. These flashes of light are transmitted to electronics by the optical fibres along the side of the detector. They give the time at which the interaction occurred. The photo shows the calorimeter at NA48, a CERN experiment which is trying to understand the lack of anti-matter in the Universe today.

  15. A ENGENHARIA NA ESCOLA

    Directory of Open Access Journals (Sweden)

    Valéria Pelizzer Casara

    2015-04-01

    Full Text Available Este projeto teve por objetivo principal mostrar às jovens do ensino médio, como as áreas de exatas e de engenharia podem estar inseridas em situações rotineiras por elas vivenciadas e incentivá-las para ingressarem nessas áreas. O projeto foi executado na escola de ensino Médio Nelson Horostecki na cidade de Chapecó, Santa Catarina. Mostrou-se de forma simples que as áreas de exatas e de engenharia têm aplicações práticas nas nossas vidas. No desenvolvimento do projeto, realizaram-se oficinas na escola cujo tema principal abordado foi o processo de fabricação do chocolate, visto que o mesmo é um produto muito apreciado pelas adolescentes. Dentro dessa temática, foram trabalhadas as questões que envolvem conhecimentos das áreas de exatas e de engenharia, mais especificamente a Engenharia Ambiental. O projeto auxiliou na formação cidadã e também na escolha profissional das meninas. Muitas das alunas participantes nunca haviam tido contato direto com alunos graduandos de cursos na área das exatas. Mais ainda, este projeto oportunizou a aproximação da universidade com a comunidade externa. Palavras-chave: Extensão Universitária, Ciências Exatas e Engenharia, Chocolate, Oficinas.   Engineering in the school Abstract: The main objective of this project was to show high school female students how the exact sciences and engineering can be included in their routine situations encouraging them to entering in these areas. The project was carried out at the Nelson Horostecki High School in Chapecó, Santa Catarina State, Brazil. It was showed in a simple manner how exact sciences and engineering have practical applications in our lives. Workshops were conducted in the school during the execution of the project in which the main subject was the chocolate manufacturing process, since chocolate is a product greatly appreciated by the young female people. Within this matter, the activities were performed using the knowledge of

  16. Chemical modifications of liquid natural rubber

    Science.gov (United States)

    Azhar, Nur Hanis Adila; Rasid, Hamizah Md; Yusoff, Siti Fairus M.

    2016-11-01

    Liquid natural rubber (LNR) was synthesized via photosentisized degradation of natural rubber (NR). LNR was modified into epoxidized liquid natural rubber (LENR) and hydroxylated liquid natural rubber (LNR-OH) using Na2WO4/CH3COOH/H2O2 catalytic system. Chemical structures of LNR and modified LNRs were characterized using Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) and 1H Nuclear Magnetic Resonance (NMR) spectroscopies. Integration of 1H NMR was used to calculate the epoxy content (%) of LENR. 1H NMR detected the formation of LNR-OH after prolonged heating and increased of catalyst in oxidation reaction.

  17. Epistaxis na een schedeltrauma

    NARCIS (Netherlands)

    Nooij, Roland P; van Dijk, J M C Marc; Groen, Rob J M; Uyttenboogaart, Maarten; Eshghi, Omid S; Korsten-Meijer, Astrid G W

    2015-01-01

    BACKGROUND: Epistaxis is a common problem, which is usually benign in nature. In some cases, however, epistaxis is a symptom of a severe underlying condition. CASE DESCRIPTION: A 20-year-old male was treated conservatively following head injury with craniofacial and base-of-skull fractures.

  18. Investigation on U - O - Na, Pu - O - Na and U,Pu - O - Na phase diagrams

    International Nuclear Information System (INIS)

    Pillon, S.

    1989-03-01

    The thermochemical interaction between the nuclear fuel (uranium and plutonium mixed oxides) and the sodium has been investigated and particularly the three phase diagrams: U - O - Na; Pu - O - Na; U,Pu - O - Na. High temperature neutron diffraction, microcalorimetry and powder X-ray diffraction were used for the characterization of the compounds synthetized. This study allowed to complete the knowledge about each of these diagrams and to measure some physical and thermal properties on the compounds. The limits on the modelization of the fuel-sodium interaction are discussed from the results of the UO 2 - Na reaction [fr

  19. Estratégias para luz natural: sistemas inovadores.

    Directory of Open Access Journals (Sweden)

    Juliana Saiter Garrocho

    2007-07-01

    Full Text Available Diversos sistemas, estratégias e componentesinovadores de alta tecnologia paraa otimização do uso da luz natural noprojeto de arquitetura têm se desenvolvidoatualmente, principalmente na EuropaCentral, nos Estados Unidos e na Austrália.Este artigo apresenta algumas dessasestratégias descrevendo suas principaiscaracterísticas. Palavras-chave: luz natural, estratégias deprojeto, sistemas inovadores de alta tecnologia.

  20. Definition of a short-cut methodology for assessing earthquake-related Na-Tech risk

    International Nuclear Information System (INIS)

    Busini, Valentina; Marzo, Enrico; Callioni, Andrea; Rota, Renato

    2011-01-01

    Highlights: → In industrial sites located in natural hazard-prone areas technological accidents may be triggered by natural events, generating the so-called Na-Tech accidents. → In this paper, a qualitative screening methodology for assessing the earthquake Na-Tech risk has been developed with the aim of identifying which situations deserve a much more expensive Quantitative Risk Analysis. → The simple procedure developed, which summarizes in a suitable Key Hazard Indicator the Na-Tech risk level, has been validated by comparing its results with those of some Quantitative Risk Analyses involving also Na-Tech events and previously presented in the literature. - Abstract: Na-Tech (Natural and Technological) refers to industrial accidents triggered by natural events such as storms, earthquakes, flooding, and lightning. Herein, a qualitative methodology for the initial assessment of earthquake Na-Tech risk has been developed as a screening tool to identify which situations require a much more expensive Quantitative Risk Analysis (QRA). The proposed methodology, through suitable Key Hazard Indicators (KHIs), identifies the Na-Tech risk level associated with a given situation (i.e., a process plant located in a given territory), using the Analytical Hierarchy Process as a multi-criteria decision tool for the evaluation of such KHIs. The developed methodology was validated by comparing its computational results with QRA results that involved Na-Tech events previously presented in literature.

  1. Natural games

    Science.gov (United States)

    Anttila, Jani; Annila, Arto

    2011-10-01

    A course of a game is formulated as a physical process that will consume free energy in the least time. Accordingly, the rate of entropy increase is the payoff function that will subsume all forms of free energy that motivate diverse decisions. Also other concepts of game theory are related to their profound physical counterparts. When the physical portrayal of behavior is mathematically analyzed, the course of a game is found to be inherently unpredictable because each move affects motives in the future. Despite the non-holonomic character of the natural process, the objective of consuming free energy in the least time will direct an extensive-form game toward a Lyapunov-stable point that satisfies the minimax theorem.

  2. Natural uranium

    International Nuclear Information System (INIS)

    Ammerich, Marc; Frot, Patricia; Gambini, Denis-Jean; Gauron, Christine; Moureaux, Patrick; Herbelet, Gilbert; Lahaye, Thierry; Pihet, Pascal; Rannou, Alain

    2014-08-01

    This sheet belongs to a collection which relates to the use of radionuclides essentially in unsealed sources. Its goal is to gather on a single document the most relevant information as well as the best prevention practices to be implemented. These sheets are made for the persons in charge of radiation protection: users, radioprotection-skill persons, labor physicians. Each sheet treats of: 1 - the radio-physical and biological properties; 2 - the main uses; 3 - the dosimetric parameters; 4 - the measurement; 5 - the protection means; 6 - the areas delimitation and monitoring; 7 - the personnel classification, training and monitoring; 8 - the effluents and wastes; 9 - the authorization and declaration administrative procedures; 10 - the transport; and 11 - the right conduct to adopt in case of incident or accident. This sheet deals specifically with natural uranium

  3. Valores na escola

    Directory of Open Access Journals (Sweden)

    Menin Maria Suzana De Stefano

    2002-01-01

    Full Text Available Neste texto pretende-se discorrer sobre valores morais na escola e suas implicações para a formação de professores. Para tanto discutir-se-á, em primeiro lugar, e brevemente, o que são valores morais, ou éticos, e como a escola pode situar-se em relação a eles. Em seguida, serão relatadas algumas observações a respeito de valores de professores e práticas daí decorrentes. São comentados resultados de pesquisa que ilustram a transmissão de valores de forma doutrinal e a educação moral e cívica tal como realizada na ditadura militar, e, por outro lado, a posição relativista e/ou de laissez-faire que certas escolas podem adotar, metodologicamente, sobre a educação em valores. Finalmente, defender-se-á a idéia de que é necessária uma discussão sobre valores pelos diversos membros da escola e uma opção por uma metodologia para ensiná-los, seja os professores, em sua formação inicial e continuada, seja os alunos. A teoria de desenvolvimento moral de Jean Piaget será apresentada como uma referência possível para a educação em valores. Exemplos de situações escolares de conflito de valores entre direção, pais e alunos são discutidas para ilustrar como uma escola pode adotar um procedimento democrático de educação em valores, que se apresenta como um terceiro caminho possível de educação moral nas escolas, além das posições doutrinárias ou relativistas.

  4. Next nature : nature changes along with us

    NARCIS (Netherlands)

    Mensvoort, van K.M.; Grievink, H.J.

    2011-01-01

    We debate saving nature, we dream about escaping to nature, but rarely do we ask "What is nature?". The Next Nature book radically shifts your notion of nature. Where technology and nature are traditionally seen as opposed, they now appear to merge or even trade places. With our urge to design our

  5. Natural isotopes

    International Nuclear Information System (INIS)

    Vogel, J.C.

    1986-01-01

    14 C dates between 600 and 900 AD were obtained for early Iron Age sites in Natal, and from 1300 to 1450 AD for rock engraving sites in Bushmanland. Palaeoenvironmental data derived from the dating of samples related to sedimentary and geomorphic features in the central and northern Namib Desert enabled the production of a tentative graph for the changes in humidity in the region over the past 40000 years. These results suggest that relatively humid conditions came to an end in the Namib at ±25000 BP (before present). The increased precision of the SIRA mass spectrometer enabled the remeasurement of 13 C and 18 O in the Cango stalagmite. This data confirmed that the environmental temperatures in the Southern Cape remained constant to within ±1 o C during the past 5500 years. Techniques and applications for environmental isotopes in hydrology were developed to determine the origin and movement of ground water. Isotopic fractionation effects in light elements in nature were investigated. The 15 N/ 14 N ratio in bones of animals and humans increases in proportion to the aridity of the environment. This suggests that 15 N in bone from dated archaeological sites could be used to detect changes in past climatic conditions as naturally formed nitrate minerals are higly soluble and are only preserved in special, very dry environments. The sources and sinks of CO 2 on the South African subcontinent were also determined. The 13 C/ 12 C ratios of air CO 2 obtained suggest that the vegetation provides the major proportion of respired CO 2 . 9 refs., 1 fig

  6. Natural and technologic hazardous material releases during and after natural disasters: a review.

    Science.gov (United States)

    Young, Stacy; Balluz, Lina; Malilay, Josephine

    2004-04-25

    Natural disasters may be powerful and prominent mechanisms of direct and indirect hazardous material (hazmat) releases. Hazardous materials that are released as the result of a technologic malfunction precipitated by a natural event are referred to as natural-technologic or na-tech events. Na-tech events pose unique environmental and human hazards. Disaster-associated hazardous material releases are of concern, given increases in population density and accelerating industrial development in areas subject to natural disasters. These trends increase the probability of catastrophic future disasters and the potential for mass human exposure to hazardous materials released during disasters. This systematic review summarizes direct and indirect disaster-associated releases, as well as environmental contamination and adverse human health effects that have resulted from natural disaster-related hazmat incidents. Thorough examination of historic disaster-related hazmat releases can be used to identify future threats and improve mitigation and prevention efforts.

  7. A aposta na filosofia

    Directory of Open Access Journals (Sweden)

    Márcio Suzuki

    2011-12-01

    Full Text Available Para Hume, filosofar é uma atividade semelhante às demais ocupações humanas. A decisão que leva à atividade filosófica é menos resultado de uma argumentação teórica do que fruto de um cálculo prático, que é entendido como uma caça ou um jogo. O objetivo deste trabalho será o de mostrar que no jogo filosófico perde quem joga sério demais. A aposta na filosofia tem que passar pelo bom humor e pela diversão: uma resposta a Pascal?For Hume, philosophy is in itself neither more nor less important than other human activities. On the contrary, it can be explained from its resemblance with game and hunting. If one chooses to dedicate himself to philosophy, his decision is not the consequence of logical reasoning, but depends on practical evaluation, which has something to do with gambling. The following text tries to show that in philosophy, like in other games, the loser will be the one who plays too earnestly. The philosophical game requires good humour and some relaxation: Is this a good answer to Pascal's pari?

  8. CERN result provides definite answer to one of nature's most subtle secrets

    CERN Multimedia

    CERN Press Office. Geneva

    2001-01-01

    At a seminar at CERN on 10 May the NA48 collaboration announced its final result on one of nature's best-kept secrets : direct Charge Parity (CP)-violation. This subtle effect explains nature's preference for matter over antimatter.

  9. VPLIV OSEBNOSTI NA STILE VODENJA

    OpenAIRE

    Vučak, Petra

    2009-01-01

    Nekatere naše vrline krasijo zlate lastnosti, druge pa kvarijo sivi odtenki. Če bi ljudje razumeli in spoznali svojo osebnost, ter osebnostne tipe drugih ljudi, bi se problemi pri komunikaciji občutno zmanjšali. Takrat bi namreč lažje uvideli, zakaj je nekdo reagiral na način, kot je ali zakaj je nekdo dejal to, kar je. Smisel tega je, da spoznamo svoje dobre lastnosti, ki jih lahko še bolj razvijemo, slabe pa poskušamo nadzorovati in tako zmanjšati njihov vpliv. Iskanje uspešnih in učink...

  10. SPOLNO NADLEGOVANJE NA DELOVNEM MESTU

    OpenAIRE

    Rubič, Gašper

    2016-01-01

    V diplomskem delu smo v uvodu predstavili problem spolnega nadlegovanja na delovnem mestu in predstavili podjetje TEKSTIL d.d. V nadaljevanju smo z anketo raziskali, ali problem spolnega nadlegovanja na delovnem mestu v obravnavanem podjetju obstaja in če, kako se nanj odziva okolje. V teoretičnem delu smo nadaljevali in predstavili definicijo spolnega nadlegovanja, ki je kakršna koli oblika nezaželenega verbalnega in neverbalnega ali fizičnega ravnanja spolne narave z učinkom ali nameno...

  11. Active transport of Na+ by reconstituted Na,K-ATPase

    International Nuclear Information System (INIS)

    Boldyrev, A.A.; Svinukhova, I.A.

    1987-01-01

    The ability of ATP, CTP, ITP, GTP, and UTP to support ouabain-sensitive accumulation of Na + by proteoliposomes with a reconstituted Na/K-pump was investigated. At a low [Na + ]/[K + ] ratio in the medium (20 mM/50 mM), a correlation is observed between the proton-accepting capacity of the nucleotide and its effectiveness as a substrate of active transport. To test the hypothesis of the importance of the presence of a negative charge in the 1-position of the purine (3-pyrimidine) base of the nucleotide for mutual transitions between the Na- and K-conformations of Na,K-ATPase they used two analogs of ATP: N 1 -hydroxy-ATP, possessing proton acceptor capacity, and N 1 -methoxy-ATP, in the molecule of which the negative charge is quenched by a methyl group. The first substrate supports active accumulation of Na + in proteoliposomes at the same rate as ATP, whereas the second substrate is relatively ineffective

  12. Integração entre logística e marketing: fatores críticos na perspectiva de interação e colaboração Integration between logistics and marketing: critical factors in the interaction and collaboration's perspective

    Directory of Open Access Journals (Sweden)

    Márcio Lopes Pimenta

    2011-12-01

    Full Text Available Diversos pesquisadores destacam a existência de estreita relação entre as funções de Marketing e Logística. É percebido que a integração destas funções exerce influência positiva no desempenho das organizações. A literatura sobre integração interfuncional sugere configurações de estratégias formais e informais, no intuito de estudar a sinergia dentro das organizações. O objetivo deste artigo é identificar e caracterizar elementos que facilitam ou dificultam a integração entre as funções de Logística e Marketing, no âmbito interno de organizações do setor de laticínios. O trabalho consiste em uma pesquisa bibliográfica sobre o tema, seguido de um estudo de caso múltiplo, de modo a evidenciar os conceitos e os pressupostos obtidos na literatura. Entrevistas em profundidade foram conduzidas com quatro gerentes, com base na técnica do incidente crítico (FLANAGAN, 1954, que também contribuiu para a análise e interpretação dos dados. Como resultados, tem-se que a percepção dos gerentes de Marketing e de Logística revela a existência de elementos que inibem a integração entre estas áreas, bem como elementos que facilitam a integração. Além disso, foram evidenciadas situações de integração formais (estruturas hierárquicas entre Marketing e Logística e informais (relações de confiança e sinergia entre os dois gerentes de área que, conforme a literatura pesquisada, são adotadas diante da necessidade de maiores níveis de interação ou de colaboração, respectivamente. Os elementos inibidores e facilitadores de integração, aqui mencionados, bem como suas definições, podem subsidiar futuros trabalhos no âmbito da integração interfuncional entre Marketing e Logística, e ainda, entre diversas áreas internas das organizações.Many researchers highlight the existence of a close relationship between Marketing and Logistics functions. It is perceived that the integration of these functions

  13. The effect of Na+ and K+ on the thermal denaturation of Na+ and + K+-dependent ATPase.

    Science.gov (United States)

    Fischer, T H

    1983-01-01

    To increase our understanding of the physical nature of the Na+ and K+ forms of the Na+ + K+-dependent ATPase, thermal-denaturation studies were conducted in different types of ionic media. Thermal-denaturation measurements were performed by measuring the regeneration of ATPase activity after slow pulse exposure to elevated temperatures. Two types of experiments were performed. First, the dependence of the thermal-denaturation rate on Na+ and K+ concentrations was examined. It was found that both cations stabilized the pump protein. Also, K+ was a more effective stabilizer of the native state than was Na+. Secondly, a set of thermodynamic parameters was obtained by measuring the temperature-dependence of the thermal-denaturation rate under three ionic conditions: 60 mM-K+, 150 mM-Na+ and no Na+ or K+. It was found that ion-mediated stabilization of the pump protein was accompanied by substantial increases in activation enthalpy and entropy, the net effect being a less-pronounced increase in activation free energy. PMID:6309139

  14. Beam monitoring at NA2

    CERN Multimedia

    1978-01-01

    Claus Goessling working on the beam Cerenkov counter of NA2. The muon beam enters from left the hall EHN2 and the last element of the beam transport. On background is the access door on the Jura side.

  15. Risbjerg: Historisk stemmeskred med NA

    DEFF Research Database (Denmark)

    Thomsen, Søren Risbjerg

    2007-01-01

    ANALYSE: NA flytter 12,3 pct. af stemmerne i majs meningsmålinger - historisk mange vælgere på en måned, skriver professor Risbjerg. Udgivelsesdato: 3. juni 2007......ANALYSE: NA flytter 12,3 pct. af stemmerne i majs meningsmålinger - historisk mange vælgere på en måned, skriver professor Risbjerg. Udgivelsesdato: 3. juni 2007...

  16. Na via do Behemoth

    Directory of Open Access Journals (Sweden)

    Gérard Rabinovitch

    2008-06-01

    Full Text Available O momento nazista permanece um enigma impensado de que a cultura contemporânea continua cativa. O autor levanta a hipótese de que a persistência desse enigma e seus estragos duráveis se devem à insistência dos pensamentos político, sociológico e filosófico em construírem o nazismo à luz da metáfora hobbesiana do Leviatã. Propõe retomar a questão do nazismo sob a perspectiva do Behemoth, antônimo do Leviatã. Para tanto, sugere a necessidade de retornar a Freud e à psicanálise, balizas de um possível novo pensamento do político que escrutine a destrutividade nazista. Propõe ainda sondar as homologias entre nazismo, corjas e máfias, com base na figura da " heroicização da violência" que lhes seria comum. E avança um modelo " econômico" : a quimera, suscetível de capturar o caráter heterotópico e heterocrônico de sua construção criminosa.The paths of Behemoth. The Nazi moment remains as the thoughtless enigma of which contemporary culture is still captive. The author raises the hypothesis where the persistency of this enigma and its durable damages are due to the insistence of the political, social and philosophical thoughts in building the Nazism at the view of the Hobbesian metaphor of Leviathan. It is here proposed to resume the Nazism matter under Behemoth's perspective, antonym to Leviathan. For such, it is suggested a necessity to look back at Freud and the psychoanalysis, structured by a possible new political thought which scrutinizes the destructivity of the Nazism. It is also here proposed to gaze at the homologies between Nazism, mafias and gangs, with a base in the figure of " violence as a heroically act" that are their common ground. The author also advances an economical model: the chimera susceptible to capture the heterotopic and heterochronic character of its criminal construction.

  17. Effects of insecticides used in Bemisia tabaci (Gennadius biotype B control and their selectivity to natural enemies in soybean cropEfeitos dos inseticidas utilizados no controle de Bemisia tabaci (Gennadius biótipo B e sua seletividade aos inimigos naturais na cultura da soja

    Directory of Open Access Journals (Sweden)

    Simone Silva Vieira

    2012-10-01

    Full Text Available In recent crop seasons, the whitefly, Bemisia tabaci biotype B has become a serious pest in soybean crops due to high infestations and its control difficulties. Therefore, it is important to search control alternatives in the integrated pest management approach. Thus, it was evaluated in this study the efficacy of the whitefly control using different insecticides in greenhouse conditions and their selectivity to the parasitoids Encarsia formosa, Trichogramma pretiosum and Telenomus remus. Buprofezin 150 g. a.i.ha-1 + mineral oil 0.2% v/v and pyriproxyfen 100 g. a.i.ha-1 were considered the best options for the whitefly management due to combine good pest control efficacy with higher selectivity to the parasitoids except Encarsia formosa for which no treatment was classified as harmless. Betacyflutrin 9.375 + imidacloprid 75 g. i.a. ha-1 was efficient on controlling whiteflies nymphs but was not harmless to the studied natural enemies. In general, the treatments including pyretroids compounds (betacyflutrin 9.375 + imidacloprid 75 + spiromesifen 60, betacyflutrin 9.375 + imidacloprid 75 and lambda-cyhalothrin 26.5 + thiametoxan 35.25 g. a.i. ha-1 were the most harmful to the evaluated parasitoids and therefore it use should be avoid whenever possible. Nas últimas safras a mosca-branca, Bemisia tabaci biótipo B (Hemiptera: Aleyrodidae tornou-se praga de importância econômica para a cultura da soja devido à ocorrência de altas infestações e à dificuldade de controle desta praga. Sendo assim, é importante buscar alternativas de manejo com base em um programa de manejo integrado de pragas. Assim, avaliaram-se neste trabalho a eficiência de diferentes inseticidas no controle da mosca-branca em casa-de-vegetação e a seletividade destes aos parasitoides Encarsia formosa, Trichogramma pretiosum e Telenomus remus. Buprofezina 150 g i.a. ha-1 + óleo mineral 0,2% v/v e piriproxifem 100 g. i.a. ha-1 foram consideradas as melhores opções para

  18. Variation of Natural Gamma Radiation in Isparta

    International Nuclear Information System (INIS)

    Akkurt, I.

    2004-01-01

    There is always a radiation in the earth, and its level is generated primarily by galactic cosmic rays (GCR), consisting of energetic nuclei of all naturally occurring elements, interacting with atmospheric constituents, through atomic and nuclear collisions. The other sources of natural radiations are global average background radiation from terrestrial sources such as soils, rocks ete. Background radiation levels in the atmosphere vary in intensity with latitude, altitude and phase of the solar cycle. Variation of natural radiation as a function of altitude, geological structure etc has been investigated. The measurements were performed using portable radiation counter which connected to NaI(Tl) probe

  19. Nature and nature values in organic agriculture

    DEFF Research Database (Denmark)

    Hansen, Lene; Noe, Egon; Højring, Katrine

    2006-01-01

    The relationship between agriculture and nature is a centra issue in the current agricultural debate. Organic farming has ambitions and a special potential in relation to nature. Consideration for nature is part of the guiding principals of organic farming and many organic farmers are committed...... to protecting natural qualities. However, the issue of nature, landscape, and land use is not straightforward. Nature is an ambiguous concept that involves multiple interests and actors reaching far beyond farmers. The Danish research project ......

  20. Ion Exchange Properties of Georgian Natural Zeolites

    Directory of Open Access Journals (Sweden)

    Vladimer Tsitsishvili

    2017-06-01

    Full Text Available Ion-exchange properties of natural zeolites of Georgia with a relatively low Si/Al ratio have been studied: analcimes are characterized by selectivity series: Na+>K+>Ag+>NH4+>Ca+2>Sr+2>Li+; for phillipsites selectivity sequences are different for calcium- and potassium forms; selectivity sequence for scolecite is: Sr+2>Ba+2>Rb+>Ca+2>Cs+>K+>NH4+>Na+>Mg+2>Li+>Cd+2>Cu+2> Mn+2> Zn+2>Co+2>Ni+2.

  1. Structural simulation of natural zeolites

    International Nuclear Information System (INIS)

    Sanchez P, E.; Carrera G, L.M.

    1997-01-01

    The application of X-ray diffraction (XRD) in the study of crystalline structures of the natural and modified zeolites allows the identification, lattice parameter determination and the crystallinity grade of the sample of interest. Until two decades ago, simulation methods of X-ray diffraction patterns were developed with which was possible to do reliable determinations of their crystalline structure. In this work it is presented the first stage of the crystalline structure simulation of zeolitic material from Etla, Oaxaca which has been studied for using it in the steam production industry and purification of industrial water. So that the natural material was modified for increasing its sodium contents and this material in its turn was put in contact with aqueous solutions of Na, Mg and Ca carbonates. All the simulations were done with the Lazy-Pulverix method. The considered phase was clinoptilolite. It was done the comparison with three clinoptilolite reported in the literature. (Author)

  2. Natural radioactivity of sediments from Wei River of Shannxi province

    International Nuclear Information System (INIS)

    Wang Fengling; Lu Xinwei

    2008-01-01

    The natural radioactivity level in sediments from Wei River of Shannxi has been surveyed with a NaI(Tl) γ-spectrometer and its radiation hazards to the people has been assessed. The results indicate the natural radioactivity level in sediments from Wei River of Shaanxi is normal and the sediments can be safely used as building materials. (authors)

  3. Criptococose pulmonar: aspectos na tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Silva Ana Carina Gamboa da

    2003-01-01

    Full Text Available A criptococose pulmonar é uma doença causada pelo Criptococcus neoformans, um fungo unimórfico que possui distribuição mundial, existindo na mesma forma tanto no seu habitat natural quanto em animais e humanos. A doença possui apresentações clínica e patológica variáveis e pode manifestar-se tanto em pacientes com a imunidade normal como em imunocomprometidos, que representam a maioria dos casos. Neste trabalho são analisados os aspectos encontrados nas tomografias computadorizadas do tórax de 14 pacientes com criptococose pulmonar confirmada. Os achados mais freqüentes na tomografia do tórax foram as massas e os nódulos pulmonares. Outros aspectos observados foram as áreas de escavação, as consolidações, o espessamento do interstício peribroncovascular e o reticulado difuso. Massa pulmonar foi o achado isolado mais comum (64,2%, seguido dos nódulos isolados ou múltiplos (35,7%. Doença pulmonar difusa foi vista em apenas 14,2% dos casos. Os lobos superiores foram os mais comprometidos, sendo a doença mais comum nas regiões anteriores. A tomografia do tórax permitiu avaliar com precisão o grau de comprometimento do parênquima pulmonar.

  4. Status for 2018, CERN NA63

    CERN Document Server

    Nielsen, CF; Di Piazza, A; Wistisen, TN

    2018-01-01

    In the NA63 experiment of April 2018 the purpose was to look for the effect of the derivative term, the so-called Schott-term, in classical radiation reaction as described in \\cite{DiPiazza20171}. Data was taken for 20, 40 and 80 GeV electrons and positrons aligned to the $\\langle100\\rangle$ axis of a diamond crystal of thickness 1.5 mm, as well as for 40 and 80 GeV electrons on a 1.0 mm thick diamond aligned to the $\\langle100\\rangle$ axis. The data which was taken during the run shows encouraging results, but await a thorough analysis. For the 2017 data, the analysis is still ongoing, but expected to be finished within the coming few months. The results look very promising, but no final conclusion can be drawn at the present stage. For the 2016 results on quantum radiation reaction obtained by CERN NA63, the results have been published in Nature Communications \\cite{Wist17}.

  5. Financiranje projekata na pomorskom dobru

    Directory of Open Access Journals (Sweden)

    Zoran Tasić

    2018-02-01

    Full Text Available Koncesije otvaraju vrlo osjetljiva politička, ekonomska i pravna pitanja u mnogim državama svijeta. Samo definiranje pojma koncesije često je komplicirana i ne sasvim jasna zadaća. OECD je prihvatila definiciju koncesije kao: ’’davanje prava privatnom trgovačkom društvu da može gospodarski upravljati određenom infrastrukturnim uslugama i za to zarađivati naknadu. Koncesionar dobija u posjed određene objekte (ali vlasništvo na tim objektima ostaje u rukama države te ih koristi u svrhu obavljanja određene djelatnosti ili usluge sukladno odredbama ugovora’’. Hrvatsko pravo definira koncesije načelno kao pravo stečeno temeljem ugovora o koncesiji, a sukladno uvjetima sadržanim u odluci o davanju koncesije (koju je donijelo odgovarajuće upravno tijelo, a u odnosu na pomorsko dobro, specifično, kao pravo državne vlasti da može dio pomorskog dobra, koje je inače dobro izvan pravnog prometa (res extra commercium, isključiti iz opće uporabe bilo dijelom ili u cijelosti, i dati ga fizičkoj ili pravnoj osobi na gospodarsko korištenje sukladno određenim prostornim planovima. Građevine i drugi objekti izgrađeni na pomorskom dobru čine njegov sastavni dio. Zakonom je jasno određeno da nikakva stvarna prava nisu dopuštena na pomorskom dobru, uključivo i na objektima izgrađenima na njemu. Projekti na pomorskom dobru često uključuju velike infrastrukturne projekte, razvoje luka i marina, koji iziskuju značajna financijska sredstva. Banke koje financiraju takve projekte zahtijevaju organiziran i transparentan zakonski okvir koncesija, slobodu ugovaranja, pravnu zaštitu svih strana uključenih u projekt (uključivo i mogućnost međunarodne arbitraže. (...

  6. Recikliranje plastenk na kreativen način

    OpenAIRE

    Pavlin, Suzana

    2017-01-01

    Plastenke, poleg ostalih plastičnih izdelkov, v zadnjih letih predstavljajo pravo katastrofo za okolje. Domnevamo, da se le redko kdo vpraša, kaj se zgodi z njo po tem, ko je iz nje zaužil še zadnjo kapljico vode. Plastenka je lahko kot večina ostalih komunalnih odpadkov ponovno uporabljena, reciklirana, sežgana ali odložena na deponijo. V primeru nespoštovanja Zakona o varstvu okolja pa pristane v naravi, pogosto v morju, kjer prav počasi razpada in negativno vpliva na celoten ekosistem. V d...

  7. All new for NA62

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

    This week sees the start of the first run of the new NA62 experiment. This will be a unique opportunity for the collaboration to test its new beam, new detectors and new data acquisition system before the physics run in 2014. Speaking to the Bulletin, the NA62 technical coordinator Ferdinand Hahn shares the many challenges that the various teams faced to be on time for beam. Ready, steady, start!   A Large Angle Veto detector (white) in place in the NA62 decay volume (blue). With components from almost all the detectors in place downstream of the decay point of the mother particles – the kaons – and of the KTAG detector that tags the kaons before they decay, NA62 is ready for its first technical run. This unique run will test all the equipment as well as the trigger and the data acquisition systems. “This year, we will have about five weeks of beam from the SPS before the long shutdown of all the CERN machines,” says Ferdinand Hahn, NA62 Technical Co-...

  8. Corpo e sexualidade na gravidez

    Directory of Open Access Journals (Sweden)

    Natalúcia Matos Araújo

    2012-06-01

    Full Text Available Estudo etnográfico que teve como objetivo compreender como as gestantes vivenciam os processos fisiológicos do seu corpo durante a gestação e a sua repercussão na sexualidade. A pesquisa envolveu sete mulheres residentes em bairro popular de São Paulo. Na coleta de dados, utilizou-se observação participante e entrevista com questões norteadoras. Os dados foram apresentados na forma de narrativa e posteriormente organizados nas categorias: Percebendo as transformações corporais; Convivendo com as mudanças no corpo; Sentimentos e sensações na vida sexual durante a gestação e imaginando o corpo e a sexualidade após a gestação. As mulheres referiram-se às transformações do corpo como desconfortos e expressaram a preocupação de que fossem definitivas. Expressaram o desejo de que, após o parto, o corpo volte a ser como era e que volte a sentir desejo sexual. O reconhecimento destes fatos constitui-se numa ferramenta primordial na adequação das práticas profissionais.

  9. Novas democracias e outras democracias na América Latina

    Directory of Open Access Journals (Sweden)

    Yamandú Acosta

    2014-12-01

      Abstract From a transformation of the expression “new democracies” coined by Weffort, is proposed a lecture of transitions and resultant democracies in Latin-America from the ‘80. Democracies with modernization but without modernity and socialism, are the product of triumphant transitions from new authoritarianisms foundational or re-foundational from ´60 and ’70.  Synergy between socialization operated by authoritarian Leviathan and that which has place immediately by a totalizer market in the frame of post-authoritarian democracies, shows the presence of “national security dictatorships” in “mercantile security democracies” expressing a deep continuity invisibly sense behind an apparent rupture. Forehead “new democracies”, article consider as “other democracies” those who comes from new constituents and constitutions foundational and re-foundational which imposed a new political and theoretical agenda in the new century. These “other democracies” comes from emergencies of trans-modernity that critically appeal to modernization, modernity and post-modernity as its resulting cultural logic. Weigh the anchor democracy from totalized mercantile relations and treat of to articulate it upon human and nature life in its diverse expressions like its discernment. Modernity / Trans-modernity tension run through theory and practice of democracy y Latin-America. Key words New democracies - Other democracies –Modernity - Trans-modernity --- Resumen  A partir de  una resignificación de la expresión “nuevas democracias” acuñada por Weffort, se propone una lectura de las transiciones y de las democracias resultantes en América Latina desde los ’80. Democracias con modernización pero sin modernidad y sin socialismo, son el producto de transiciones triunfantes desde los nuevos autoritarismos fundacionales o refundacionales de los ’60 y ’70.  La sinergia entre la socialización operada por el Leviatán autoritario y la que tiene

  10. Salinity controls on Na incorporation in Red Sea planktonic foraminifera

    Science.gov (United States)

    Mezger, E. M.; de Nooijer, L. J.; Boer, W.; Brummer, G. J. A.; Reichart, G. J.

    2016-12-01

    Whereas several well-established proxies are available for reconstructing past temperatures, salinity remains challenging to assess. Reconstructions based on the combination of (in)organic temperature proxies and foraminiferal stable oxygen isotopes result in relatively large uncertainties, which may be reduced by application of a direct salinity proxy. Cultured benthic and planktonic foraminifera showed that Na incorporation in foraminiferal shell calcite provides a potential independent proxy for salinity. Here we present the first field calibration of such a potential proxy. Living planktonic foraminiferal specimens from the Red Sea surface waters were collected and analyzed for their Na/Ca content using laser ablation quadrupole inductively coupled plasma mass spectrometry. Using the Red Sea as a natural laboratory, the calibration covers a broad range of salinities over a steep gradient within the same water mass. For both Globigerinoides ruber and Globigerinoides sacculifer calcite Na/Ca increases with salinity, albeit with a relatively large intraspecimen and interspecimen variability. The field-based calibration is similar for both species from a salinity of 36.8 up to 39.6, while values for G. sacculifer deviate from this trend in the northernmost transect. It is hypothesized that the foraminifera in the northernmost part of the Red Sea are (partly) expatriated and hence should be excluded from the Na/Ca-salinity calibration. Incorporation of Na in foraminiferal calcite therefore provides a potential proxy for salinity, although species-specific calibrations are still required and more research on the effect of temperature is needed.

  11. gigapanorama of NA 62 cavern

    CERN Multimedia

    Brice, Maximilien

    2015-01-01

    The image shows the new rare Kaon decay experiment at CERN, called NA62. The NA62 experiment is 270 metres long and includes a 120-metre-long vacuum tank, shown here, housing several of the particle detectors. (Note: the experiment axis is a straight line, the curving of the tank is an optical effect of the photo.) Kaons are particles that decay into lighter elementary particles. The kaon decay processes are mostly well known, except for some very rare decay modes. For example, NA62 is investigating a rare decay predicted by the Standard Model in which a kaon decays into one pion and two neutrinos. This process occurs only once every 10 billion decays. The understanding of such ultra-rare decays are of great importance because they test the Standard Model in energy ranges not accessible by direct measurements. They are therefore complementary to the measurements at the LHC. ultra high definition on demand (photolab@cern.ch).

  12. Armas na escola: que fazer?

    Directory of Open Access Journals (Sweden)

    Raymundo de Lima

    2010-09-01

    Full Text Available

    Um aluno portava um revólver na sala de aula de uma escola de Maringá (O Diário, 30/07/2010. Ele pegou arma do pai, sem que este soubesse, para se proteger de garotos que o intimidavam. Trata-se de um caso isolado ou é hora de a escola tomar medidas preventivas? Semanas antes, tiros foram disparados dentro de uma faculdade da mesma cidade. O autor dos disparos está preso, e a faculdade tenta apagar as marcas com publicidade positiva na Tv. Em Campo Mourão, cidade a cerca de uma hora de Maringá, duas meninas foram mortas e enterradas na escola.

  13. OGLAŠEVANJE NA FACEBOOKU

    OpenAIRE

    Renko, Katica

    2013-01-01

    V magistrskem delu smo se seznanili z oglaševanjem na Facebooku. S pregledom gradiva, ki nam je ponujeno, smo preverili pogoje, načine, oblike … oglaševanja, ki pa smo jih s pregledom situacije v praksi preverili in dopolnili. Ob zaključku dela lahko rečemo, da je oglaševanje preko FB enostavnejše, cenejše, dostopnejše, omogoča nam ažurnost in samo komunikacijo z naslovniki, ki so potencialni kupci naših ponudb. Množični mediji nam omogočajo mnogotero obliko oglaševanja. Izbrana oblika ponuja...

  14. Non-preferential fuelling of the Na(+)/K(+)-ATPase pump.

    Science.gov (United States)

    Fernández-Moncada, Ignacio; Barros, L Felipe

    2014-06-15

    There is abundant evidence that glycolysis and the Na(+)/K(+)-ATPase pump are functionally coupled, and it is thought that the nature of the coupling is energetic, with glycolysis providing the ATP that fuels the pump. This notion has been instrumental to current models of brain energy metabolism. However, structural and biophysical considerations suggest that the pump should also have access to mitochondrial ATP, which is much more abundant. In the present study, we have investigated the source of ATP that fuels the Na(+) pump in astrocytes, taking advantage of the high temporal resolution of recently available FRET nanosensors for glucose, lactate and ATP. The activity of the Na(+) pump was assessed in parallel with the Na(+)-sensitive dye SBFI AM (Na(+)-binding benzofuran isophthalate acetoxymethyl ester). OXPHOS (oxidative phosphorylation) inhibition resulted in bulk ATP depletion and a 5-fold stimulation of glycolytic flux, in spite of which Na(+) pumping was inhibited by 90%. Mathematical modelling of ATP dynamics showed that the observed pump failure is inconsistent with preferential fuelling of the Na(+) pump by glycolytic ATP. We conclude that the nature of the functional coupling between the Na(+) pump and the glycolytic machinery is not energetic and that the pump is mainly fuelled by mitochondrial ATP.

  15. β decay of Na32

    Science.gov (United States)

    Mattoon, C. M.; Sarazin, F.; Hackman, G.; Cunningham, E. S.; Austin, R. A. E.; Ball, G. C.; Chakrawarthy, R. S.; Finlay, P.; Garrett, P. E.; Grinyer, G. F.; Hyland, B.; Koopmans, K. A.; Leslie, J. R.; Phillips, A. A.; Schumaker, M. A.; Scraggs, H. C.; Schwarzenberg, J.; Smith, M. B.; Svensson, C. E.; Waddington, J. C.; Walker, P. M.; Washbrook, B.; Zganjar, E.

    2007-01-01

    The β-decay of Na32 has been studied using β-γ coincidences. New transitions and levels are tentatively placed in the level scheme of Mg32 from an analysis of γ-γ and β-γ-γ coincidences. The observation of the indirect feeding of the 2321 keV state in Mg32 removes some restrictions previously placed on the spin assignment for this state. No evidence of a state at 2117 keV in Mg32 is found. Previously unobserved weak transitions up to 5.4 MeV were recorded but could not be placed in the decay scheme of Na32.

  16. Corpo-escrita na esquizofrenia

    OpenAIRE

    Bialer, Marina

    2014-01-01

    Este artigo aborda a importância do trabalho de escrita na esquizofrenia. Toma-se como ponto de partida a formulação lacaniana sobre o esquizofrênico como aquele que não tem as funções dos órgãos do seu corpo dadas pelos discursos estabelecidos. A hipótese de que o trabalho sobre a letra pode permitir o tratamento do gozo debordante na esquizofrenia é analisada pelo estudo da obra do escritor esquizofrênico Robert Walser, a qual evidencia a viabilidade da construção de um corpo pela escrita n...

  17. Meltability in system of K2TaF7-NaF-NaCl-KCl

    International Nuclear Information System (INIS)

    Kartsev, V.E.; Kovalev, F.V.; Korshunov, B.G.

    1975-01-01

    Thermographic and visual-polythermal techniques were used to study the meltability in K 2 TaF 7 -NaF-NaCl-KCl system. The tetrahedron-forming sections NaF-NaCl-K 2 TaF 7 xKCl and NaF-K 2 TaF 7 xKCl-2K 2 TaF 7 xNaCl divide the concentration tetrahedron into three particular tetrahedra: NaF-K 2 TaF 7 xKCl-2K 2 TaF 7 xNaCl-K 2 TaF 7 , NaF-NaCl-K 2 TaF 7 xKCl-2K 2 TaF 7 xaCl, and NaF-NaCl-KCl-K 2 TaF 7 xKCl. Non-variant equilibrium points in all of the particular four-component systems have been determined

  18. Efeito da natureza do eletrólito e da força iônica na energia livre da reação de adsorção de níquel em solos Effect of electrolyte nature and ionic strength in the free energy of nickel adsorption reaction in soils

    Directory of Open Access Journals (Sweden)

    Cindy Silva Moreira Iglesias

    2007-10-01

    Full Text Available A adsorção é o principal processo responsável pelo acúmulo de metais pesados na superfície dos colóides do solo. O conhecimento detalhado desse fenômeno pode fornecer subsídios para o aprimoramento das práticas de remediação de solos contaminados. Avaliou-se a energia livre (deltaG0 de adsorção de Ni em amostras superficiais (0,0-0,2 m e subsuperficiais (na maior expressão do horizonte B de um Latossolo Vermelho acriférrico típico textura argilosa (LVwf e de um Nitossolo Vermelho eutroférrico textura muito argilosa (NVef, utilizando-se soluções de NaCl e CaCl2 em três forças iônicas (1,0, 0,1 e 0,01 mol L-1. As amostras de solo receberam 2, 5, 10, 20, 30, 40, 50 e 70 mg dm-3 de Ni, na proporção solo:solução de 1:10. A adsorção de Ni pelos solos foi espontânea, visto que a deltaG0 apresentou valores negativos em todas as concentrações estudadas. Os valores de deltaG0 diminuíram com o aumento da dose de Ni adicionada. O NVef apresentou maior deltaG0 que o LVwf devido, principalmente, às suas características químicas e mineralógicas. Os horizontes superficiais apresentaram, em geral, maior deltaG0 em relação aos subsuperficiais, em razão do elevado teor de matéria orgânica encontrado em superfície. A deltaG0 foi maior para as menores forças iônicas do meio, tanto para CaCl2 quanto para NaCl.The adsorption is the main process responsible for the accumulation of heavy metals in the surface of soil colloids. Detailed knowledge of this phenomenon can contribute to improve the remediation practices for contaminated soil. The free energy (deltaG0 of Ni adsorption was evaluated in surface (0.0-0.2 m and subsurface (in the maximum expression of B horizon samples of a clayey Rhodic Acrudox (RA and a very clayey Eutric Kandiudalf (EK. Ni was added (2, 5, 10, 20, 30, 40, 50, and 70 mg dm-3, in a 1:10 soil:solution ratio. Two background electrolytes (NaCl and CaCl2 and three ionic strengths - IS (1.0; 0.1 and 0

  19. NA60 frees the quarks

    CERN Multimedia

    2003-01-01

    Fitted with new state-of-the-art silicon detectors, NA60 is prepared to study the phase transition from confined hadronic matter to a deconfined (free) quark-gluon plasma, a state of matter which probably existed an instant after the Big Bang.

  20. NA61/SHINE ion program

    CERN Document Server

    Mackowiak, Maja

    2010-01-01

    The Super Proton Synchrotron (SPS) at CERN covers one of the most interesting regions of the phase diagram (T - \\mu_{B}) of strongly interacting matter. The study of central Pb+Pb collisions by NA49 indicate that the threshold for deconfinement is reached already at the low SPS energies. Theoretical considerations predict a critical point of strongly interacting matter at energies accessible at the SPS. The NA61/SHINE experiment, a successor of the NA49 project, will study hadron production in p+p, p+A, h+A, and A+A reactions at various energies. The broad physics program includes the investigation of the properties of strongly interacting matter, as well as precision measurements of hadron spectra for the T2K neutrino experiment and for the Pierre Auger Observatory and KASCADE cosmic-ray projects. The main physics goals of the NA61/SHINE ion program are to study the properties of the onset of deconfinement at low SPS energies and to find signatures of the critical point of strongly interacting matter. To ach...

  1. NA62: Hidden Sector Physics

    CERN Document Server

    Cesarotti, Carissa Joyce

    2016-01-01

    Modern experimental physics is often probing for new physics by either finding deviations from predictions on extremely precise measurements, or by looking for a new signal that cannot be explained with existing models. The NA62 experiment at CERN does the former by measuring the ultra-rare decay $K^+ \\rightarrow \\pi^+ \

  2. The system NaVO3-Na2WO4-Na2W2O7

    International Nuclear Information System (INIS)

    Kazanbekov, V.R.; Gasanaliev, A.M.; Kazanbekov, R.G.

    1994-01-01

    Phase diagrams of sodium metavanadate-sodium ditungstate, sodium metavanadate-sodium tungstate systems and surface of primary crystallization of sodium metavabadate-sodium tungstate-sodium ditungstate system were studied. The system sodium metavanadate-sodium ditungstate is eutectic one. Compound NaVO 3 x2Na 2 WO 4 is formed in solid state in sodium metavanadate-sodium tungstate system. Liquidus surface of sodium metavanadate-sodium tungstate-sodium ditungstate is presented by three crystallization fields of initial components. Composition and melting point of ternary eutectics are determined

  3. Europlanet NA2 Science Networking

    Science.gov (United States)

    Harri, Ari-Matti; Szego, Karoly; Genzer, Maria; Schmidt, Walter; Krupp, Norbert; Lammer, Helmut; Kallio, Esa; Haukka, Harri

    2013-04-01

    Europlanet RI / NA2 Science Networking [1] focused on determining the major goals of current and future European planetary science, relating them to the Research Infrastructure that the Europlanet RI project [2] developed, and placing them in a more global context. NA2 also enhanced the ability of European planetary scientists to participate on the global scene with their own agenda-setting projects and ideas. The Networking Activity NA2 included five working groups, aimed at identifying key science issues and producing reference books on major science themes that will bridge the gap between the results of present and past missions and the scientific preparation of the future ones. Within the Europlanet RI project (2009-2012) the NA2 and NA2-WGs organized thematic workshops, an expert exchange program and training groups to improve the scientific impact of this Infrastructure. The principal tasks addressed by NA2 were: • Science activities in support to the optimal use of data from past and present space missions, involving the broad planetary science community beyond the "space club" • Science activities in support to the preparation of future planetary missions: Earth-based preparatory observations, laboratory studies, R&D on advanced instrumentation and exploration technologies for the future, theory and modeling etc. • Develop scientific activities, joint publications, dedicated meetings, tools and services, education activities, engaging the public and industries • Update science themes and addressing the two main scientific objectives • Prepare and support workshops of the International Space Science Institute (ISSI) in Bern and • Support Trans National Activities (TNAs), Joined Research Activities (JRAs) and the Integrated and Distributed Information Service (IDIS) of the Europlanet project These tasks were achieved by WG workshops organized by the NA2 working groups, by ISSI workshops and by an Expert Exchange Program. There were 17 official WG

  4. Pozitivni in negativni vplivi risank na otroke

    OpenAIRE

    Povše, Nika

    2017-01-01

    V tej diplomski nalogi smo raziskovali pozitivne in negativne vplive risank na otroke. Začeli smo z zgodovino televizije, tako svetovno zgodovino kot zgodovino televizije na Slovenskem. Na isti način smo pregledali tudi zgodovino risank. Raziskovali smo otrokov razvoj, predvsem tiste vidike, ki so izpostavljeni vplivom risank, kot so morala, jezik, domišljija in učenje. Sledilo je raziskovanje negativnih in pozitivnih vplivov, ki jih imajo risanke na otroke, kar je tudi naš glavni problem te ...

  5. Ação de produtos naturais sobre a sobrevivência de Argyrotaenia sphaleropa (Meyrick (Lepidoptera: Tortricidae e seletividade de inseticidas utilizados na produção orgânica de videira sobre Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae Action of natural products on the survival of Argyrotaenia sphaleropa (Meyrick (Lepidoptera: Tortricidae and selectivity of insecticides used in the organic production of vine on Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae

    Directory of Open Access Journals (Sweden)

    Wilson José Morandi Filho

    2006-08-01

    Full Text Available Nesse trabalho, foi estudado o efeito de formulações comerciais de inseticidas, com ênfase para os produtos permitidos na produção orgânica (nim, piretro natural e extrato pirolenhoso para o controle de Argyrotaenia sphaleropa (Meyrick (Lepidoptera: Tortricidae e sua atuação sobre o parasitóide de ovos Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae, em laboratório. Os inseticidas Natuneem® (1500ppm de Azadirachta indica por litro e o extrato pirolenhoso (Biopirol 7 M®, nas dosagens de 250 e 500mL 100L-1, não foram eficientes no controle de A. sphaleropa quando aplicados sobre folhas de videira (Vitis sp. cultivar "Chardonnay", enquanto que o piretro natural (250 e 500mL 100L-1 resultou em mortalidade significativa de 77,65 e 85,88% dos insetos, respectivamente, 120 horas após a aplicação. O efeito secundário foi avaliado sobre adultos do parasitóide de ovos T. pretiosum, seguindo a metodologia da International Organization for Biological and Integrated Control (IOBC. Os inseticidas Natuneem® (500mL 100L-1, Biopirol 7 M® (500mL 100L-1 e Dipel DF® (100g 100L-1 foram inócuos (99% de redução no parasitismo, respectivamente, equivalendo-se ao efeito do fosforado Lebaycid 500® (100mL 100 L-1.This work was conducted to study the effect of commercial formulations of insecticides with emphasis on that allowed in the organic production (neem, natural piretro and pirolenhoso extract to control Argyrotaenia sphaleropa (Meyrick (Lepidoptera: Tortricidae and their performance on the egg parasitoid Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae adults. The insecticides Natuneem® (1500ppm of azadirachtin L-1 and the pirolenhoso extract (Biopirol 7 M® (250 and 500mL 100L-1 were not efficient in the control of A. sphaleropa when applied over grapevine leaves (Vitis sp. cultivate Chardonnay. Natural piretro (250 and 500mL 100L-1 resulted in a mortality of 77.65 and 85.88% of insects, respectively 120 hours

  6. Nature and nature values in organic agriculture

    DEFF Research Database (Denmark)

    Hansen, Lene; Noe, Egon; Højring, Katrine

    2006-01-01

    The relationship between agriculture and nature is a centra issue in the current agricultural debate. Organic farming has ambitions and a special potential in relation to nature. Consideration for nature is part of the guiding principals of organic farming and many organic farmers are committed...

  7. Procedimiento para evaluar las variables generadoras de sinergias en los cambios organizacionales

    Directory of Open Access Journals (Sweden)

    Lidia María Pérez-Vallejo

    2015-01-01

    Full Text Available Las organizaciones se desarrollan en entornos que cambian rápida yconstantemente derivado de dos factores principales: las propiastransformaciones de los agentes económicos y sociales; y la actividad ydinamismo de la competencia y el desarrollo tecnológico. Es por ello que enesta investigación, partiendo del estudio de un conjunto de modelos, seproponeun procedimiento para evaluar las variablespara la generación desinergiascomo una vía favorecedora de los cambios organizacionales.Losprincipales métodos utilizados fueron:la búsqueda bibliográficayencuestas. Alvalidarloen una entidad hotelera cubana se determinó que el cambionecesario fue implementar un enfoque por proceso que permita mejorar eldesempeño empresarial. Se logró aportar la proyección acorde con lasnecesidades de la organización, así como el mejoramiento continuo de laefectividad de los procesos.

  8. Sinergia entre prácticas de física: entorno simulado vs no simulado

    OpenAIRE

    Búrdalo, Gabriel; Palencia, Covadonga; Fernández-Raga, María

    2013-01-01

    Se han realizado dos experiencias diferentes, una de ellas en la Facultad de CC Biológicas y otra en la Escuela de Ingenierías. Hemos observado que, intentando explicar el mismo concepto físico (carga y descarga de un condensador) en 2 titulaciones diferentes, cada uno de los profesores responsables hemos diseñado experiencias con enfoques prácticos distintos pero con idéntico fin. En el caso de la licenciatura, la docencia se centraba en el uso de herramientas para la ejecución de ejemplos p...

  9. Sinergias de organizaciones en redes: la simbiosis del agente en la firma

    Directory of Open Access Journals (Sweden)

    José Antonio Orellana Pino

    2009-03-01

    Full Text Available La división del trabajo especialmente en situaciones cuando las requieren se torna altamente eficiente cuando la gestión se centra en actividades de procesos estratégicos de relacionamientos del tipo redes. Al observar el sector productivo que orienta las estrategias para la formación de alianzas y relaciones permanentes a empresas junto a los proveedores y clientes se centran en las oportunidades de nuevos mercados. Crean por tanto emprendimientos que estimulan la expansión de asociaciones a redes económicas de relacionamientos para desarrollar actividades conjuntas. Fortalecer los lazos no garantiza la potenciación de los miembros de la red, sino que estimula la competitividad junto a la cooperación constructiva de los accionistas (GRAY & WOOD 1991 y la participación en las decisiones estratégicas. Las diferentes visiones de los miembros hace de la red un vínculo simbiótico que participan en la elección de los mercados objetivos y por tanto, complementa la cartera de empresas en la red.

  10. Na+-stimulated ATPase of alkaliphilic halotolerant cyanobacterium Aphanothece halophytica translocates Na+ into proteoliposomes via Na+ uniport mechanism

    Directory of Open Access Journals (Sweden)

    Soontharapirakkul Kanteera

    2010-08-01

    Full Text Available Abstract Background When cells are exposed to high salinity conditions, they develop a mechanism to extrude excess Na+ from cells to maintain the cytoplasmic Na+ concentration. Until now, the ATPase involved in Na+ transport in cyanobacteria has not been characterized. Here, the characterization of ATPase and its role in Na+ transport of alkaliphilic halotolerant Aphanothece halophytica were investigated to understand the survival mechanism of A. halophytica under high salinity conditions. Results The purified enzyme catalyzed the hydrolysis of ATP in the presence of Na+ but not K+, Li+ and Ca2+. The apparent Km values for Na+ and ATP were 2.0 and 1.2 mM, respectively. The enzyme is likely the F1F0-ATPase based on the usual subunit pattern and the protection against N,N'-dicyclohexylcarbodiimide inhibition of ATPase activity by Na+ in a pH-dependent manner. Proteoliposomes reconstituted with the purified enzyme could take up Na+ upon the addition of ATP. The apparent Km values for this uptake were 3.3 and 0.5 mM for Na+ and ATP, respectively. The mechanism of Na+ transport mediated by Na+-stimulated ATPase in A. halophytica was revealed. Using acridine orange as a probe, alkalization of the lumen of proteoliposomes reconstituted with Na+-stimulated ATPase was observed upon the addition of ATP with Na+ but not with K+, Li+ and Ca2+. The Na+- and ATP-dependent alkalization of the proteoliposome lumen was stimulated by carbonyl cyanide m - chlorophenylhydrazone (CCCP but was inhibited by a permeant anion nitrate. The proteoliposomes showed both ATPase activity and ATP-dependent Na+ uptake activity. The uptake of Na+ was enhanced by CCCP and nitrate. On the other hand, both CCCP and nitrate were shown to dissipate the preformed electric potential generated by Na+-stimulated ATPase of the proteoliposomes. Conclusion The data demonstrate that Na+-stimulated ATPase from A. halophytica, a likely member of F-type ATPase, functions as an electrogenic Na

  11. A integração da pesquisa ao conhecimento ecológico local no subsídio ao manejo: variações no estoque natural da ostra de mangue crassostrea spp. na reserva extrativista do Mandira, Cananéia-SP, Brasil

    Directory of Open Access Journals (Sweden)

    Ingrid Cabral Machado

    2011-06-01

    Full Text Available Este estudo teve o objetivo de descrever uma experiência de integração entre conhecimento científico e comunitário no subsídio ao manejo, a partir das avaliações do estoque da ostra de mangue Crassostrea spp. na Reserva Extrativista do Mandira, baseadas em estudos populacionais e no Conhecimento Ecológico Local (CEL e percepção da comunidade. Os dados dos estudos populacionais apresentaram aspectos concordantes com o Conhecimento Ecológico Local, evidenciando variações no estoque de ostras na Reserva.This study aimed to illustrate the experience of integration between scientific knowledge and Local Ecological Knowledge to subside management from the assessments of the mangrove oyster stock in the Mandira Extractive Reserve, based on population studies and on local ecological knowledge and perception of the community. Data from population studies showed features consistent with the Local Ecological Knowledge, providing evidence of variations in the stock of oysters in the Mandira Extractive Reserve.

  12. Photodesorption of Na atoms from rough Na surfaces

    DEFF Research Database (Denmark)

    Balzer, Frank; Gerlach, R.; Manson, J.R.

    1997-01-01

    We investigate the desorption of Na atoms from large Na clusters deposited on dielectric surfaces. High-resolution translational energy distributions of the desorbing atoms are determined by three independent methods, two-photon laser-induced fluorescence, as well as single-photon and resonance......-enhanced two-photon ionization techniques. Upon variation of surface temperature and for different substrates (mica vs lithium fluoride) clear non-Maxwellian time-of-flight distributions are observed with a cos θ angular dependence and most probable kinetic energies below that expected of atoms desorbing from...... atoms are scattered by surface vibrations. Recent experiments providing time constants for the decay of the optical excitations in the clusters support this model. The excellent agreement between experiment and theory indicates the importance of both absorption of the laser photons via direct excitation...

  13. Vpliv konfucija na sodobno izobraževanje na Kitajskem

    Directory of Open Access Journals (Sweden)

    Katja Skitek

    2009-12-01

    Full Text Available Izobraževanje na Kitajskem je bilo vedno trdno povezano s Konfucijem in konfucianizmom, kar pa ni čudno, saj je bil Konfucij prvi, ki je poudarjal moč z nanja in izobraževanja. LR Kitajska je v zadnjih petdesetih letih počasi in postopoma začela uveljavljati določene spremembe v vzgojno-izobraževalni sistem. Kakšne so te spremembe in koliko nanje še vedno vpliva konfucianizem, bo osrednja tema pričujočega članka. Konfucianizem danes na Kitajskem ni preveč popularen, izobraženci pa so se razporedili v dve skupini: eni trdijo, da je njegov vpliv še vedno velik, drugi pa zatrjujejo, da nima več nobenega vpliva na sodobno življenje. Katera stran ima prav? Konfucij je v prvi vrsti poudarjal pomembnost moralnih vrednot vsakega človeka in prav moralne vrednote, za katere se je zavzemal, so še danes trdno zasidrane v kitajski kulturi. Ali je torej sploh mogoče popolnoma izriniti Konfucija iz sodobnega izobraževanja?

  14. Three Sorts of Naturalism

    DEFF Research Database (Denmark)

    Fink, Hans

    2006-01-01

    In "Two sorts of Naturalism" John McDowell is sketching his own sort of naturalism in ethics as an alternative to "bald naturalism". In this paper I distinguish materialist, idealist and absolute conceptions of nature and of naturalism in order to provide a framework for a clearer understanding...

  15. Natural gas trends

    International Nuclear Information System (INIS)

    Anderson, A.

    1991-01-01

    This book provides data on many facets of the natural gas industry. Topics include: Canadian, Mexican; US natural gas reserves and production; Mexican and US natural gas consumption; market conditions for natural gas in the US; and Canadian natural gas exports

  16. Mensuração dos custos de laboratório para produção da vespa Cotesia flavipes - inimigo natural da broca da cana-de-açúcar na Usina Naviraí S.A.: uma análise comparativa = Laboratory costs for production of the wasp Cotesia flavipes - natural enemy of the sugar cane borer at the Navirai S.A. factory: A comparative analysis

    Directory of Open Access Journals (Sweden)

    Adélia Megumi Suguiyama

    2015-04-01

    Full Text Available O controle biológico usando parasitoides larvais e parasitóides de ovos específicos ou entomopatógenos (fungos, bactérias ou vírus, manipulados em criatórios artificiais e liberados massivamente para o controle da broca é o mais difundido. Dentre estes, no entanto, o que tem sido comumente utilizado em escala comercial é o controle biológico com parasitóides larvais. Neste contexto, a espécie Cotesia flavipes, é uma vespa parasitóide que combate a broca da cana-de-açúcar Diatraea saccharalis (Lepidóptera, uma praga que causa grandes perdas na produção da cana-de-açúcar. Em função da importância desse tipo de controle biológico, este trabalho tem como objetivo mensurar os custos do sistema de produção de Cotesia flavipes na Usina Naviraí S.A. – Açúcar e Álcool (USINAVI, localizada em Naviraí, Mato Grosso do Sul. Ressalta-se que devido aos danos causados pela broca, os prejuízos no campo chegam a 25% de perda da produtividade da cultura Neste sentido, como principais resultados do presente estudo, sugere-se: 1. Investir em treinamento e qualificação de pessoal de laboratório e de campo; 2. Pesquisas no sentido de ajustar à técnica de controle biológico às condições ecofisiológicas da região de plantio; 3. Controle rigoroso do processo em termos de assepsia e higienização. = The biological control using parasitoids and larval parasitoid eggs or specific entomopathogens (fungi, bacteria or viruses, manipulated in artificial breeding sites and released massively to control drill, is the most widespread. Among these, however, has commonly been used on a commercial scale is biological control using larval parasitoids. In this context, the Cotesia flavipes species is a parasitoid wasp that fighting drill cane sugar Diatraea saccharalis (Lepidoptera, a pest that causes major losses in the production of cane sugar. Because of the importance of this kind of biological control, this paper aims to measure the

  17. Hidrelétricas no Rio Madeira-RO: tensões sobre o uso do território e dos recursos naturais na Amazônia Hydroélectriques dans la rivière Madeira-RO: les tensions sur l´usage du territoire et des les ressources naturelles d’Amazonie Hydroelectric at the Madeira River: tensions about the territory using and the natural resources in the Amazon

    Directory of Open Access Journals (Sweden)

    Leonardo José Cordeiro Santos

    2012-06-01

    Full Text Available A construção das usinas hidrelétricas (Jirau e Santo Antônio, iniciadas em 2008, no Rio Madeira, município de Porto Velho-RO, confere à parte da Amazônia Sul Ocidental Rondoniense, uma (revalorização diante do contexto nacional e internacional devido ao potencial energético e ainda por compor parte de complexos para circulação e energia Sul-Americana. A materialização da obra incide sobre a intensificação dos conflitos sobre o uso do território e de seus recursos, fato comprovado a partir das análises feitas sobre as escalas de atuação dos atores e as estratégias na utilização dos recursos naturais na área de estudo. Os resultados ratificam que na Amazônia Rondoniense as políticas de infraestrutura estabelecidas são resultantes de interesses externos a região e, quando implantadas, desestruturam a lógica de organização local, elevando as tensões ambientais e sociais.La construction des usines hydroélectriques (Jirau et Santo Antônio, commencée en 2008, sur le Rio Madeira, dans le município Porto Velho-RO, (revalorise la partie d’ Amazonie Sud Occidentale dú Rondônia en raison du potentiel énérfetique qu’elle gènére et son inscription dans le réseau d’alimentation électrique de l’Amérique du Sud. Mais l´rélisation des ouvrages intensifie les conflits d’utilisation du territoire et de ses ressources, comme le conferment les analyses produites par cette recherché sur les échelles d’intervention des acteurs et les estratégies d’utilisation des ressources naturelles dans la zone d’éstude. Les résultats montrent que dans l’Amazonie du Rondônia, les politiques d’infrastructure telles qu’elles sont conçues resultant d’intérêts externes à la région et, lorsqu’wlles sont implantées, déstructurent les logiques d’organisation locale et provoquent des tensions environnementales et sociales.The building of the hydroelectric plants (Jirau and Santo Antônio, which started

  18. Fragmentos da história das concepções de mundo na construção das ciências da natureza: das certezas medievais às dúvidas pré-modernas Episodes in the history of conceptions of the world of natural sciences: from medieval certainties to pre-modern doubts

    Directory of Open Access Journals (Sweden)

    Antônio Fernandes Nascimento Júnior

    2003-01-01

    Full Text Available A concepção filosófica do mundo se inicia com os gregos sintetizados por Platão e Aristóteles. Para o primeiro o mundo físico é aparente e para se chegar à verdade é preciso se lembrar das idéias originais que determinam seu significado. Para o segundo as coisas físicas são dirigidas pelas idéias e para entendê-las é preciso a lógica. Durante o helenismo a escola de Alexandria elabora o neoplatonismo, a base da Patrística. Após a queda de Roma, os filósofos bizantinos guardam a herança clássica. A Igreja constrói uma visão neoplatônica da cristandade, a Escolástica. No oriente os persas também sofreram a influência grega. Entre os árabes do Oriente o pensamento neoplatônico orienta filósofos e religiosos de forma que para eles a razão e a fé não se separam. Aí a ciências se desenvolvem na física, na alquimia, na botânica, na medicina, na matemática e na lógica, até serem subjugadas pela doutrina conservadora dos otomanos. Na Espanha mulçumana sem as restrições da teologia, a filosofia de Aristóteles é mais bem compreendida do que no resto do Islã. Também aí todas as ciências se desenvolvem rápido. Mas a Espanha sucumbe aos cristãos. Os árabes e judeus apresentam Aristóteles à Europa Ocidental que elabora um Aristóteles cristão. A matemática, a física experimental, a alquimia e a medicina dos árabes influenciam intensamente o Ocidente. Os artesãos constroem instrumentos cada vez mais precisos, os navegadores constroem navios e mapas mais eficientes e minuciosos, os armeiros calculam melhor a forma de lançamento e pontaria de suas armas e os agrimensores melhor elaboram a medida de sua área de mapeamento. Os artistas principalmente italianos, a partir dos clássicos gregos e árabes, criam a perspectiva no desenho, possibilitando a matematização do espaço. Os portugueses, junto com cientistas árabes, judeus e italianos, concluem um projeto de expansão naval e ampliam os horizontes

  19. Novel aspects of Na+,K+-ATPase

    OpenAIRE

    Aizman, Oleg

    2002-01-01

    Na,K-ATPase, an integral membrane protein expressed in each eukaryotic cell, serves as the major determinant of intracellular ion composition. In the current study we investigated novel aspects of Na,K-ATPase function and regulation. It is well established that Na,K-ATPase activity is regulated by reversible phosphorylation. New findings in this study are: 1) the level of intracellular Ca 2. concentration determines the functional effects of PKA and PKC-mediated Na,K-ATP...

  20. Prediction of Intrinsic Cesium Desorption from Na-Smectite in Mixed Cation Solutions.

    Science.gov (United States)

    Fukushi, Keisuke; Fukiage, Tomo

    2015-09-01

    Quantitative understanding of the stability of sorbed radionuclides in smectite is necessary to assess the performance of engineering barriers used for nuclear waste disposal. Our previous study demonstrated that the spatial organization of the smectite platelets triggered by the divalent cations led to the apparent fixation of intrinsic Cs in smectite, because some Cs is retained inside the formed tactoids. Natural water is usually a mixture of Na(+) and divalent cations (Ca(2+) and Mg(2+)). This study therefore investigated the desorption behavior of intrinsic Cs in Na-smecite in mixed Na(+)-divalent cation solutions under widely various cation concentrations using batch experiments, grain size measurements, and cation exchange modeling (CEM). Results show that increased Na(+) concentrations facilitate Cs desorption because Na(+) serves as the dispersion agent. A linear relation was obtained between the logarithm of the Na(+) fraction and the accessible Cs fraction in smectite. That relation enables the prediction of accessible Cs fraction as a function of solution cationic compositions. The corrected CEM considering the effects of the spatial organization suggests that the stability of intrinsic Cs in the smectite is governed by the Na(+) concentration, and suggests that it is almost independent of the concentrations of divalent cations in natural water.

  1. NA64 Status Report 2018

    CERN Document Server

    Gninenko, Sergei

    2018-01-01

    The experiment NA64 is aimed at a search for a sub-GeV vector mediator (called dark photon A′) of Dark Matter production at the CERN SPS. . The main goal in 2017 was to probe a region of the A′ parameter space of the thermal dark matter model. Ongoing activities on the detector and data analysis are reviewed. The status and results from the NA64 runs in 2016 and 2017 are reported. First results on the search for the X->e+e− decay of a 17 MeV X boson, which could explain the recently observed excess of e+e-pairs from the excited 8Be nucleus transitions, and A'-> e+e- decays are also presented. Ongoing analysis on the decays of axion-like particles and plans for further searches beyond LS2 are also discussed.

  2. Makosa Yanayofanywa na Wanafunzi Wanaojifunza Kiswahili kama ...

    African Journals Online (AJOL)

    Makala haya, yanashughulika na makosa ambayo hufanywa na wanafunzi wanaojifunza Kiswahili kama lugha ya pili katika shule za sekondari nchini Uganda. Mtafiti ameyaainisha makosa mbalimbali na kuyaeleza kiusahihi. Makala yanaeleza namna ambavyo makosa hayo hutokea. Yaani, kama ni makosa ...

  3. A Natural Language Architecture

    OpenAIRE

    Sodiya, Adesina Simon

    2007-01-01

    Natural languages are the latest generation of programming languages, which require processing real human natural expressions. Over the years, several groups or researchers have trying to develop widely accepted natural language languages based on artificial intelligence (AI). But no true natural language has been developed. The goal of this work is to design a natural language preprocessing architecture that identifies and accepts programming instructions or sentences in their natural forms ...

  4. Geothermal-brine modeling - prediction of mineral solubilities in natural waters: the Na-K-Mg-Ca-H-Cl-SO{sub 4}-OH-HCO{sub 3} CO{sub 3}-CO{sub 2}-H{sub 2}O system to high ionic strengths at 25{sup 0}C

    Energy Technology Data Exchange (ETDEWEB)

    Weare, J.H.

    1981-01-01

    The mineral solubility model of Harvie and Weare (1980) is extended to the eight component system, Na-K-Ca-Mg-H-Cl-SO{sub 4}-OH-HCO{sub 3}-CO{sub 3}-CO{sub 2}-H{sub 2}O at 25{sup 0}C to high concentrations. The model is based on the semi-empirical equations of Pitzer (1973) and co-workers for the thermodynamics of aqueous electrolyte solutions. The model is parameterized using many of the available isopiestic, electromotive force, and solubility data available for many of the subsystems. The predictive abilities of the model are demonstrated by comparison to experimental data in systems more complex than those used in parameterization. The essential features of a chemical model for aqueous electrolyte solutions and the relationship between pH and the equilibrium properties of a solution are discussed.

  5. Environmental background level of cosmic ray produced 22Na

    International Nuclear Information System (INIS)

    Tokuyama, H.; Oonishi, M.; Matsuura, H.

    1993-01-01

    The annual deposition rate of cosmogenic 22 Na has been studied at Fukui City, Japan, to obtain the current background level. The deposition rate was found to range from 0.16 to 0.22 Bq m -2 y -1 with a mean value of 0.20 Bq m -2 y -1 for the years 1986-1990. The author's results agree fairly well with those observed for the years 1975-1977 in Tokyo. The 22 Na concentration in rain water was also estimated. The mean value for this period was found to be 0.09 mBq litre -1 , which is about one-third of that detected during the latter half of the 1950's. The high levels of environmental 22 Na in the 1950's are attributed to the many nuclear weapon tests conducted at that time. At present, however, the 22 Na from these weapons tests has practically decayed and the concentration in rain water has decreased to the natural background level. (Author)

  6. Virginia Natural Heritage Program

    Science.gov (United States)

    Heritage About Natural Heritage Overview, Mission Natural Heritage Inventory Community Ecology Program ) | Strategic Plan (PDF) | Executive Progress Report (PDF) | Code of Ethics (PDF) Your browser does not support

  7. Crescimento, morfologia radicular e liberação de compostos orgânicos por plântulas de soja em função da atividade de alumínio na solução do solo de campo natural Growth, root morphology and organic compounds released by soybean seedlings as a function of aluminum activity in a field soil solution

    Directory of Open Access Journals (Sweden)

    Antonio Nolla

    2007-02-01

    Full Text Available A toxicidade do alumínio em solos é considerada uma das maiores limitações para a produção das culturas. No entanto, algumas plantas são capazes de tolerar altas concentrações de alumínio por sua complexação com ácidos orgânicos exsudados pelas raízes. No intuito de estudar os efeitos concomitantes de faixas pH e de alumínio no desenvolvimento radicular de plântulas de soja, desenvolveu-se um trabalho na solução de um Argissolo Vermelho distrófico típico de campo natural. Cultivou-se, em câmara de crescimento, plântulas pré-germinadas de soja durante três dias dentro de tubos de ensaio aerados contendo 40ml da solução do solo (4,2µmol de Al L-1, submetidos a quatro concentrações de alumínio (0,0; 0,3; 0,6 e 1,2µmol L-1 e três níveis de pH (4,0; 5,0 e 6,0. O crescimento radicular e da parte aérea da soja foi menor em condições mais ácidas (pH 4,0. Em condições de acidez intermediária (pH H2O 5,0, o crescimento radicular foi menos afetado pelas espécies rizotóxicas de alumínio, mesmo quando submetidas a elevadas concentrações de alumínio na solução do solo.Aluminum toxicity in soils is considered one of the major limitations to crop production. However, some plants are able to tolerate high aluminum concentrations due to its complexation with root organic acids exudates. The simultaneous effect of pH ranges and aluminum concentration in soil solution on soybean seedlings root development was studied in a Rhodic Paleudult soil solution under natural grasses vegetation. Soybean seedlings were grown in growth chamber for three days in aerated test tubes containing 40ml soil solution (4.2µmol Al L-1, submmited to four aluminum concentrations (0.0, 0.3, 0.6 and 1.2mmol L-1 and three pH levels (4.0, 5.0 and 6.0. Root and aerial growth decreased under more acidic conditions (pH 4.0. Root growth was less affected by rhyzotoxic aluminum species at pH 5.0, even when submitted to high concentration of

  8. Crystallographic characterization of cement pastes hydrated with NaCl; Caracterizacao cristalografica de pastas de cimento hidratadas com NaCl

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Carina Gabriela de Melo e; Martinelli, Antonio Eduardo; Melo, Dulce Maria Araujo; Melo, Marcus Antonio de Freitas; Melo, Vitor Rodrigo de Melo e [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2012-07-01

    One of the major current challenges faced by oil companies is the exploration of pre salt basins. Salt layers deposited upon the evaporation of ocean water and continental separation are mainly formed by NaCl and isolate immense oil reservoirs. The mechanical stability and zonal isolation of oil wells that run through salt layers must be fulfilled by cement sheaths saturated with NaCl to assure chemical compatibility between cement and salt layer. The present study aimed at evaluating the effect of NaCl addition on the hydration of oil well cement slurries as well as identifying the nature of crystalline phases present in the hardened cement. To that end, cement slurries containing NaCl were mixed, hardened and characterized by X-ray diffraction. The results revealed that the presence of NaCl affects the formation of hydration products by the presence of Friedel's salt. The intensity of the corresponding peaks increase as the contents of NaCl in the slurry increase. High concentrations of NaCl in Portland slurries increase the setting time of cement and the presence of Friedel's salt decreases the strength of the hardened cement. (author)

  9. Natural Colorants: Food Colorants from Natural Sources.

    Science.gov (United States)

    Sigurdson, Gregory T; Tang, Peipei; Giusti, M Mónica

    2017-02-28

    The color of food is often associated with the flavor, safety, and nutritional value of the product. Synthetic food colorants have been used because of their high stability and low cost. However, consumer perception and demand have driven the replacement of synthetic colorants with naturally derived alternatives. Natural pigment applications can be limited by lower stability, weaker tinctorial strength, interactions with food ingredients, and inability to match desired hues. Therefore, no single naturally derived colorant can serve as a universal alternative for a specified synthetic colorant in all applications. This review summarizes major environmental and biological sources for natural colorants as well as nature-identical counterparts. Chemical characteristics of prevalent pigments, including anthocyanins, carotenoids, betalains, and chlorophylls, are described. The possible applications and hues (warm, cool, and achromatic) of currently used natural pigments, such as anthocyanins as red and blue colorants, and possible future alternatives, such as purple violacein and red pyranoanthocyanins, are also discussed.

  10. Pseudo-ternary phase diagram in the Na2O-Na2O2-NaOH system

    International Nuclear Information System (INIS)

    Saito, Jun-ichi; Tendo, Masayuki; Aoto, Kazumi

    1997-10-01

    Generally, the phase diagrams are always used to understand the present state of compounds at certain temperature. In order to understand the corrosion behavior of structural material for FBR by main sodium compounds (Na 2 O, Na 2 O 2 and NaOH), it is very important to comprehend the phase diagrams of their compounds. However, only Na 2 O-NaOH pseudo-binary phase diagram had been investigated previously in this system. There is no study of other pseudo-binary or ternary phase diagrams in the Na 2 O-Na 2 O 2 -NaOH system. In this study, in order to clarify the present states of their compounds at certain temperatures, the pseudo-binary and ternary phase diagrams in the Na 2 O-Na 2 O 2 -NaOH system were prepared. A series of thermal analyses with binary and ternary component system has been carried out using the differential scanning calorimetry (DSC). The liquidus temperature and ternary eutectic temperatures were confirmed by these measurements. The beneficial indications for constructing phase diagrams were obtained from these experiments. On the basis of these results, the interaction parameters between compounds which were utilized for the Thermo-Calc calculation were optimized. Thermo-Calc is one of thermodynamic calculation software. Consequently the accurate pseudo-binary and ternary phase diagrams were indicated using the optimized parameters. (author)

  11. Na+,K+-ATPase Na+ affinity in rat skeletal muscle fiber types

    DEFF Research Database (Denmark)

    Kristensen, Michael; Juel, Carsten

    2010-01-01

    Previous studies in expression systems have found different ion activation of the Na(+)/K(+)-ATPase isozymes, which suggest that different muscles have different ion affinities. The rate of ATP hydrolysis was used to quantify Na(+),K(+)-ATPase activity, and the Na(+) affinity of Na(+),K(+)-ATPase...

  12. Homocisteína Homocysteine

    Directory of Open Access Journals (Sweden)

    Lindalva Batista Neves

    2004-10-01

    Full Text Available A homocisteína, formada a partir da metionina hepática, é metabolizada nas vias de desmetilação e de transulfuração, sendo que seus valores plasmáticos e urinários refletem a síntese celular. Sua determinação, realizada em jejum e após sobrecarga de metionina, caracteriza as diferenças dessas vias metabólicas, principalmente quando de natureza genética. A hiper-homocisteinemia tem sido associada a maior risco de eventos aterotrombóticos, e a literatura sugere associação causal, independente de outros fatores de risco para doença arterial. Diminuição da homocisteína plasmática para valores normais é seguida de redução significante na incidência de doença aterotrombótica. A relação entre homocisteína e o fígado vem adquirindo importância nos dias atuais, uma vez que alterações das lipoproteínas e da depuração de metionina são comuns em pacientes com doença hepática crônica (hepatocelular e canalicular. O tratamento da hiper-homocisteinemia fundamenta-se na suplementação alimentar e medicamentosa de ácido fólico e vitaminas B6 e B12.Homocysteine, formed from hepatic methionine, is metabolized through the pathways of demethylation and transsulfuration. Its plasmatic and urinary values reflect the cell synthesis. Its determination after fasting and increased infusion of methionine shows the differences of these two metabolic pathways, mainly when it is related to genetic diseases. Hyperhomocysteinemia has been associated with a higher risk of vascular thrombotic events. Several authors suggest a causal relationship between these events independently of other risk factors for vascular diseases. Decrease in plasmatic homocysteine to normal levels is followed by a significant reduction on the incidence of vascular thrombotic events. The correlation between the liver and homocysteine is becoming more important because of the recent findings that alterations of lipoproteins and methionine clearance are

  13. Regularities, Natural Patterns and Laws of Nature

    Directory of Open Access Journals (Sweden)

    Stathis Psillos

    2014-02-01

    Full Text Available  The goal of this paper is to sketch an empiricist metaphysics of laws of nature. The key idea is that there are regularities without regularity-enforcers. Differently put, there are natural laws without law-makers of a distinct metaphysical kind. This sketch will rely on the concept of a natural pattern and more significantly on the existence of a network of natural patterns in nature. The relation between a regularity and a pattern will be analysed in terms of mereology.  Here is the road map. In section 2, I will briefly discuss the relation between empiricism and metaphysics, aiming to show that an empiricist metaphysics is possible. In section 3, I will offer arguments against stronger metaphysical views of laws. Then, in section 4 I will motivate nomic objectivism. In section 5, I will address the question ‘what is a regularity?’ and will develop a novel answer to it, based on the notion of a natural pattern. In section 6, I will raise the question: ‘what is a law of nature?’, the answer to which will be: a law of nature is a regularity that is characterised by the unity of a natural pattern.

  14. The mineralogy and chemistry of the German and Portuguese tiles used to face a historic building in the Amazon region and their natural susceptibility to tropical weathering Mineralogia e química de azulejos Alemães e Portugueses de prédios históricos na região Amazônica e sua susceptibilidade natural à degradação tropical (intemperismo

    Directory of Open Access Journals (Sweden)

    Marcondes L. da Costa

    2013-09-01

    Full Text Available During the 19th century, the most prominent buildings of the city of Belém were faced entirely with tiles manufactured in Portugal and Germany, which now exhibit distinct degrees of degradation. The Pinho mansion is one of the most important of these buildings and was selected for the investigation of the action of the tropical Amazonian climate on the degradation of the tiles. To achieve this objective, the tiles were mapped for organic and inorganic degradation, and samples were collected for analysis. The minerals were determined by XRD, the chemical composition by classical wet methods and SEM/EDS, and the microorganisms under the microscope. The results show that the German and Portuguese tiles are quite different in their composition. While both ceramic bodies are composed of SiO2 and Al2O3, CaO was found only in the Portuguese tile. The low Na2O and K2O contents indicate the addition of materials to reduce the fusion temperature. SiO2 and PbO are the main constituents of the glaze, with CoO and FeO being added as pigment. The ceramic body of the German tiles is constituted of quartz, mullite, and cristobalite, in contrast with the Portuguese tiles, which are made of quartz, gehlenite, diopside, calcite, and feldspars. The glazes are XRD-amorphous. The chemical and mineralogical differences between the German and Portuguese tiles indicate that they were produced from different raw materials under distinct thermal processes. The most prominent weathering-related modifications are the thin layers (German tiles, oxidation stains, dark stains, the detachment of the tile (Portuguese tiles, loss of the glaze and powdering of the ceramic body (Portuguese tiles through the establishment of Cyanophyta and Bacillariophyta.. The distinct degradation patterns of the tiles exposed to the tropical Amazon climate are a consequence of their distinct mineralogy and chemistry.As proeminentes edificações da cidade de Belém foram revestidas durante o s

  15. Src-independent ERK signaling through the rat α3 isoform of Na/K-ATPase.

    Science.gov (United States)

    Madan, Namrata; Xu, Yunhui; Duan, Qiming; Banerjee, Moumita; Larre, Isabel; Pierre, Sandrine V; Xie, Zijian

    2017-03-01

    The Na/K-ATPase α1 polypeptide supports both ion-pumping and signaling functions. The Na/K-ATPase α3 polypeptide differs from α1 in both its primary structure and its tissue distribution. The expression of α3 seems particularly important in neurons, and recent clinical evidence supports a unique role of this isoform in normal brain function. The nature of this specific role of α3 has remained elusive, because the ubiquitous presence of α1 has hindered efforts to characterize α3-specific functions in mammalian cell systems. Using Na/K-ATPase α1 knockdown pig kidney cells (PY-17), we generated the first stable mammalian cell line expressing a ouabain-resistant form of rat Na/K-ATPase α3 in the absence of endogenous pig α1 detectable by Western blotting. In these cells, Na/K-ATPase α3 formed a functional ion-pumping enzyme and rescued the expression of Na/K-ATPase β1 and caveolin-1 to levels comparable with those observed in PY-17 cells rescued with a rat Na/K-ATPase α1 (AAC-19). The α3-containing enzymes had lower Na + affinity and lower ouabain-sensitive transport activity than their α1-containing counterparts under basal conditions, but showed a greater capacity to be activated when intracellular Na + was increased. In contrast to Na/K-ATPase α1, α3 could not regulate Src. Upon exposure to ouabain, Src activation did not occur, yet ERK was activated through Src-independent pathways involving PI3K and PKC. Hence, α3 expression confers signaling and pumping properties that are clearly distinct from that of cells expressing Na/K-ATPase α1. Copyright © 2017 the American Physiological Society.

  16. Comparison of the Economic Aspects of the Treatment and Storage of Fission Products from Installations Processing Irradiated Natural Uranium; Aspects Economiques Compares du Traitement et du Stockage des Produits de Fission Issus des Usines de Traitement de l'Uranium Naturel Irradie; Sravnitel'nye ehkonomicheskie aspekty obrabotki i khraneniya produktov deleniya, poluchaemykh na zavodakh po pererabotke obluchennogo prirodnogo urana; Aspectos Economicos Comparados del Tratamiento y del Almacenamiento de los Productos de Fision que Salen de las Plantas de Tratamiento de Uranio Natural Irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Thiriet, L.; Lesur, P.; Giraud, R. [Commissariat a l' Energie Atomique, Paris (France); Wanlin, J. [Societe Saint-Gobain Techniques Nouvelles, Paris (France)

    1966-02-15

    The paper summarizes the main policies adopted for the management of fission product effluents and briefly describes the essential technical features of the stainless steel storage installations (in acid medium) used in France, giving a breakdown of the costs involved. The dependence of these costs on the activity of the solutions stored and on their heat release is shown. The second part of the paper discusses the cost of storage in terms of feasible tank size. The optimum size for such tanks and the rate at which they are placed in service are determined in relation to the characteristics of the fission products to be stored and to the respective capacities of the installations for processing irradiated natural uranium. It is shown that although storage costs depend on the assumptions made regarding the useful life of installations, rates of interest and operating costs, optimum policy decisions (as to size and rate of entry into service) are independent of these assumptions, being determined solely by the variation in the cost of tanks, according to size. These are the factors which enter into the optimized cost of storing these effluents indefinitely. In the third part, this method of indefinite storage is compared with other possibilities of fission product management, e.g. vitrification and separation of Cs and Sr. The paper discusses the economics of the various methods and summarizes some possible long-term solutions. (author) [French] Apres avoir rappele les principales politiques de gestion le plus souvent envisagees pour les produits de fission, le memoire decrit sommairement les caracteristiques techniques essentielles des installations de stockage en acier inoxydable (en milieu acide) utilisees en France et la structure des couts de ces installations. U montre la sensibilite de ces couts a l'activite des solutions stockees et a leur degagement de chaleur. Dans une deuxieme partie, les auteurs examinent leur cout de stockage, selon la taille des

  17. Myocardial Na,K-ATPase: Clinical aspects

    OpenAIRE

    Kjeldsen, Keld

    2003-01-01

    The specific binding of digitalis glycosides to Na,K-ATPase is used as a tool for Na,K-ATPase quantification with high accuracy and precision. In myocardial biopsies from patients with heart failure, total Na,K-ATPase concentration is decreased by around 40%; a correlation exists between a decrease in heart function and a decrease in Na,K-ATPase concentration. During digitalization, around 30% of remaining pumps are occupied by digoxin. Myocardial Na,K-ATPase is also influenced by other drugs...

  18. Crowdsourcing: impactos na performance na venda de produtos

    OpenAIRE

    Alves, Milton Ruiz Rodrigues

    2015-01-01

    Vivemos num momento em que as expectativas de pensadores como Lévy (1998), se concretizaram. O consumidor mudou, passou a exigir um diálogo entre a empresa e a sociedade. Esse novo cenário cobrou da tecnologia formas de aperfeiçoar e agilizar este processo de comunicação, plataformas baseadas na internet que propiciem e incentivam a troca de informações. Nesta esfera surgiu o crowdsourcing, com a disponibilização do capital intelectual das massas, que acabou por mudar a form...

  19. Synthesis of high capacity cation exchangers from a low-grade Chinese natural zeolite

    International Nuclear Information System (INIS)

    Wang Yifei; Lin Feng

    2009-01-01

    The Chinese natural zeolite, in which clinoptilolite coexists with quartz was treated hydrothermally with NaOH solutions, either with or without fusion with NaOH powder as pretreatment. Zeolite Na-P, Na-Y and analcime were identified as the reacted products, depending on the reaction conditions such as NaOH concentration, reaction time and hydrothermal temperature. The products were identified by X-ray diffraction, and characterized by Fourier transform IR and ICP. With hydrothermal treatment after fusion of natural zeolite with NaOH, high purity of zeolite Na-Y and Na-P can be selectively formed, their cation exchange capacity (CEC) are 275 and 355 meq/100 g respectively, which are greatly higher than that of the natural zeolite (97 meq/100 g). Furthermore, the ammonium removal by the synthetic zeolite Na-P in aqueous solution was also studied. The equilibrium isotherms have been got and the influence of other cations present in water upon the ammonia uptake suggested an order of preference Ca 2+ > K + > Mg 2+ .

  20. Natural and near natural tropical forest values

    Science.gov (United States)

    Daniel H. Henning

    2011-01-01

    This paper identifies and describes some of the values associated with tropical rain forests in their natural and near-natural conditions. Tropical rain forests are moist forests in the humid tropics where temperature and rainfall are high and the dry season is short. These closed (non-logged) and broad-leaved forests are a global resource. Located almost entirely in...

  1. Natural gas in India

    International Nuclear Information System (INIS)

    Lefevre, Thierry; Todoc, Jessie L.

    1999-11-01

    Contains Executive Summary and Chapters on: Country background; Overview of the energy sector; Natural gas supply; Natural gas infrastructure; Natural gas infrastructure; Natural gas demand; Outlook-government policy reform and industry development, and Appendices on Global and regional energy and gas trends; Overview of India's investment policy, incentives and regulation; The ENRON Dabhol power project. (Author)

  2. Hali ya taaluma ya ukalimani Tanzania: jana, leo na kesho ...

    African Journals Online (AJOL)

    Umuhimu wa ukalimani katika mawasiliano umeongezeka kutokana na utandawazi. Utandawazi umerahisisha kukutanika na kuwasiliana kwa watu wazungumzao lugha tofauti kupitia wakalimani. Kutokana na ongezeko hilo la umuhimu wa ukalimani, kumekuwa na jitihada mbalimbali katika nchi mbalimbali kuhakikisha ...

  3. Three Sorts of Naturalism

    OpenAIRE

    Fink, Hans

    2006-01-01

    In "Two sorts of Naturalism" John McDowell is sketching his own sort of naturalism in ethics as an alternative to "bald naturalism". In this paper I distinguish materialist, idealist and absolute conceptions of nature and of naturalism in order to provide a framework for a clearer understanding of what McDowell's own naturalism amounts to. I argue that nothing short of an absolute naturalism will do for a number of McDowell's own purposes, but that it is far from obvious that this is his posi...

  4. Phonon instabilities in NaNbO3

    International Nuclear Information System (INIS)

    Mishra, S.K.; Gupta, M.K.; Mittal, R.; Chaplot, S.L.

    2012-01-01

    NaNbO 3 has antiferroelectric structure at room temperature and exhibits unusual complex sequence of temperature and pressure driven structural phase transitions. Temperature dependent measurements from 17 to 1075 K revealed that NaNbO 3 undergoes a series of phase transitions, ranging from non-polar antiferrodistortive to ferroelectric and antiferroelectric in nature. High pressure measurements carried out up to 11 GPa at ambient temperature indicate transition from antiferroelectric to paraelectric phase. These transitions are characterized by appearance and disappearance of superlattice reflections in the powder diffraction patterns. Numerous Raman and infrared measurements are also reported in literature to gain reliable insights into, and deeper understanding of phase transition behavior. The optical measurements are limited to the Brillouin zone centre, which does not give a complete picture of the dynamics. Inelastic neutron scattering and ab-initio calculations were carried out to understand the phase transitions behaviour and their relation to the phonon spectra

  5. Solution dynamics of synthetic and natural polyelectrolytes

    Science.gov (United States)

    Krause, Wendy E.

    Polyelectrolytes are abundant in nature and essential to life, and used extensively in industry. This work discussed two polyelectrolytes: sodium poly(2-acrylamido-2-methylpropanesulfonate) (NaPAMS), synthetic polyelectrolyte, and sodium hyaluronate (NaHA), a glycosaminoglycan. Rheological data of NaPAMS solutions of variable chain length and concentration were reported. A strong dependence of viscosity eta on chain length: eta ˜ M2.4 was found. The comparison of the rheological data with two proposed scaling theories (Dobrynin 1995, Witten 1987) forces the conclusion that neither theory is correct. A possible interpretation of the viscosity data falling between the predictions of the two scaling theories is that some chain rigidity may persist beyond the correlation length. A sample model for the conductivity of semidilute polyelectrolytes with no added salt was presented. The model correctly describes the logarithmic decrease of specific conductance observed for many polyelectrolytes at low concentration (below ca. 10-2M), and is in good agreement with data from NaPAMS solutions. NaHA in phosphate buffered saline behaves as a typical polyelectrolyte in the high-salt limit, as Newtonian viscosities are observed over a wide range of shear rates. There is no evidence of intermolecular hydrogen bonding causing gel formation in NaHA solutions without protein present. The viscosity of 3 mg/mL NaHA was measured in the presence of the selected anti-inflammatory agents. Of the seven additives investigated only (D)-penicillamine significantly altered the rheology of HA. (D)-Penicillamine dramatically reduced the viscosity of HA, probably by disrupting intramolecular hydrogen bonding. The plasma proteins albumin and gamma-globulins bind to HA in solution to form a weak reversible gel. The rheology and osmotic pressure of the simple model for synovial fluid, consisting of 3mg/mL NaHA, 11 mg/mL albumin, and 7 mg/mL gamma-globulins in phosphate buffered saline, were studied

  6. Natural gas monthly

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-01-01

    The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the Natural Gas Monthly features articles designed to assist readers in using and interpreting natural gas information.

  7. Fitossociologia dos estratos arbóreo e de regeneração natural em um povoamento de acácia-negra (Acacia mearnsii, De Wild. na região da Floresta Estacional Semidecidual do Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Silas Mochiutti

    2008-01-01

    Full Text Available This study analyzes the structure and floristic composition of the regeneration of native forest species under black-wattle plantation, established 16 years ago in a riparian area, and it verifies the possibility of the black-wattle be considered an invasive species of this environment. The tree stratum (circumference at breast height (CBH ≥15 cm was evaluated in 12 plots of 100 m², established in four blocks. The natural regeneration stratum (0.3 m height to <15 cm CBH was evaluated in two subplots of 9 m², established in opposite vertexes of each plot. The tree stratum was composed by 26 species of 14 families and the natural regeneration stratum by 49 species of 23 families. The Shannon diversity index for species, considering all plots, was 2.60 and 3.06 to the tree and natural regeneration strata, respectively. The native species, Casearia sylvestris, Myrsine lorentziana and Zanthoxylum petiolare presented the larger importance value in the tree stratum and Faramea marginata, Myrsine lorentziana and Myrcia glabra the biggest density in the natural regeneration stratum. The ecological characteristics of the species found in several height strata indicated that the forest succession process is in evolution. The black-wattle did not regenerate in this area and the planted trees of this species are in the senescence phase. Only 100 tree/ha of black-wattle were found, which represents 4.5% of the original population. Thus, black-wattle is not an invasive species for this environment.

  8. New results from NA49

    CERN Document Server

    Afanasiev, S V; Bächler, J; Barna, D; Barnby, L S; Bartke, Jerzy; Barton, R A; Behler, M; Betev, L; Bialkowska, H; Billmeier, A; Blume, C; Blyth, C O; Boimska, B; Botje, M; Bracinik, J; Brady, F P; Bramm, R; Brun, R; Buncic, P; Carr, L; Cebra, D; Cerny, V; Cooper, G E; Cramer, J G; Csató, P; Dinkelaker, P; Eckardt, V; Eckhardt, F; Ferenc, D; Filip, P; Fischer, H G; Foder, Z; Foka, P Y; Freund, P; Friese, V; Gál, J; Ganz, R E; Gazdzicki, M; Georgopoulos, G; Gladysz-Dziadus, E; Harris, J W; Hegyi, S; Höhne, C; Igo, G; Jacobs, P; Jones, P G; Kadija, K; Kolesnikov, V I; Kollegger, T; Kowalski, M; Kraus, I; Kreps, M; Lasiuk, B; Van Leeuwen, M; Lévai, Peter; Malakhov, A I; Margetis, S; Markert, C; Mayes, B W; Melkumov, G L; Mischke, A; Molnár, J; Nelson, J M; Odyniec, Grazyna Janina; Oldenburg, M; Pálla, G; Panagiotou, A D; Perl, K; Petridis, A; Pikna, M; Pinsky, L; Poskanzer, A M; Prindle, D J; Pühlhofer, F; Putschke, J; Reid, J G; Renfordt, A; Retyk, W; Ritter, H G; Röhrich, D; Roland, C; Roland, G; Rybicki, A; Sammer, T; Sann, H; Schäfer, E; Schmitz, N; Seyboth, P; Siklér, F; Sitár, B; Skrzypczak, E; Snellings, R; Squier, G T A; Stock, Reinhard; Ströbele, H; Susa, T; Szentpétery, I; Sziklai, J; Toy, M; Trainor, T A; Trentalange, S; Ullrich, T S; Varga, D; Vassiliou, Maria; Veres, G I; Vesztergombi, G; Voloshin, S A; Vranic, D; Wang, F; Weerasundara, D D; Wenig, S; Wetzler, A; Whitten, C; Xu, N; Yates, T A; Koo, I K; Zaranek, J; Zimányi, J

    2002-01-01

    Recent results of the NA49 experiment are presented. These cover first results on pion and kaon production, HBT, and charge fluctuations from Pb+Pb reactions at 40 AGeV and their comparison to 158 AGeV beam energy. Furthermore a study on baryon number transfer in p+p, centrality selected p+Pb and Pb+Pb collisions at 158 AGeV and new results on the system size dependence of kaon yields, including C+C and Si+Si data, are presented. Additionally, a first result on Lambda Lambda correlations is shown. (11 refs).

  9. Loucura imperial na Roma antiga

    Directory of Open Access Journals (Sweden)

    Aloys Winterling

    2012-06-01

    Full Text Available Este artigo aborda a questão da "loucura imperial" na Roma antiga, indagando-se sobre o que seria peculiar a ações de imperadores, como Calígula, Nero e Domiciano, que conduziu a conflitos com a aristocracia. Argumenta-se que apenas uma análise das estruturas e sistemas históricos do Alto Império possibilita explicar certos padrões de comportamento imperial, usualmente classificados como loucura pela historiografia dos séculos XIX e XX.

  10. The Nature of Natural Hazards Communication (Invited)

    Science.gov (United States)

    Kontar, Y. Y.

    2013-12-01

    Some of the many issues of interest to natural hazards professionals include the analysis of proactive approaches to the governance of risk from natural hazards and approaches to broaden the scope of public policies related to the management of risks from natural hazards, as well as including emergency and environmental management, community development and spatial planning related to natural hazards. During the talk we will present results of scientific review, analysis and synthesis, which emphasize same new trends in communication of the natural hazards theories and practices within an up-to-the-minute context of new environmental and climate change issues, new technologies, and a new focus on resiliency. The presentation is divided into five sections that focus on natural hazards communication in terms of education, risk management, public discourse, engaging the public, theoretical perspectives, and new media. It includes results of case studies and best practices. It delves into natural hazards communication theories, including diffusion, argumentation, and constructivism, to name a few. The presentation will provide information about: (1) A manual of natural hazards communication for scientists, policymakers, and media; (2) An up-to-the-minute context of environmental hazards, new technologies & political landscape; (3) A work by natural hazards scientists for geoscientists working with social scientists and communication principles; (4) A work underpinned by key natural hazards communication theories and interspersed with pragmatic solutions; (5) A work that crosses traditional natural hazards boundaries: international, interdisciplinary, theoretical/applied. We will further explore how spatial planning can contribute to risk governance by influencing the occupation of natural hazard-prone areas, and review the central role of emergency management in risk policy. The goal of this presentation is to contribute to the augmentation of the conceptual framework

  11. Eficácia da aromaterapia na redução de níveis de estresse e ansiedade em alunos de graduação da área da saúde: estudo preliminar Effectiveness of aromatherapy in reducing stress and anxiety levels in undergraduate health science students: a preliminary study

    Directory of Open Access Journals (Sweden)

    Cassandra Santantonio de Lyra

    2010-03-01

    Full Text Available Este estudo teve como objetivo verificar a eficácia de aromaterapia na diminuição de níveis de estresse e ansiedade (traço e estado de alunos de graduação de cursos na área da saúde. Participaram do estudo 36 sujeitos, com idade entre 18 e 29 anos, que foram divididos entre os que receberam tratamento (grupo aroma, n=18 e o grupo controle (n=18. Os sujeitos foram avaliados quanto a níveis de estresse e ansiedade antes e após o período de intervenção, pela Lista de Sintomas de Estresse e pelo Inventário de Ansiedade Traço e Estado. O tratamento de aromaterapia consistiu em sete sessões (duas vezes por semana de dez minutos de inalação com uma sinergia de óleos essenciais elaborada especificamente. Os escores de estresse e ansiedade antes e depois do tratamento foram comparados estatisticamente, com nível de significância de 5% (pThe purpose of this study was to assess the efficacy of aromatherapy in decreasing stress and anxiety levels in undergraduate health science students. Thirty-six students aged 18 to 29 were divided into those who received treatment (aroma group, n=18 and a control group (n=18. All subjects were assessed as to stress and anxiety levels before and after the treatment, by means of the List of Stress Symptoms and the State-Trait Anxiety Inventory. The aromatherapy treatment consisted in twice weekly, 10-minute inhalations of a synergy of essential oils made specifically for this study, for a total of 7 sessions. Stress and anxiety scores measured before and after treatment were statistically compared, with significance level set at 5% (p<0.05. The aroma group showed a significant (p<0,05 decrease in stress (less 24% and anxitey (less 13% and 19% levels, while in control group only a significant, though lesser (11% stress level decrease could be noticed. Aromatherapy thus proved effective in reducing stress and anxiety levels in graduate health students, but there is still great need to further studies to

  12. Energy stored in irradiated NaCl

    International Nuclear Information System (INIS)

    Lidiard, A.B.

    1979-01-01

    Recently reported measurements of the energy stored in heavily irradiated NaCl are reviewed in the light of recent understanding of radiation-damage processes in this material. It is shown that, in the ranges of temperatures and dose rates of these experiments, the F-centres produced by the irradiation are retained principally in the form of colloids: the stored energy is thus a direct measure of the number of F-centres retained in this form. Comparison of these results with the prediction of the recently proposed theory of colloid growth shows that the predictions of the dependence of colloid growth rates upon temperature and dose rate are qualitatively correct. The dependence of stored energy dose, however, appears to require the inclusion of a thermally activated back-reaction and possible modifications to the theory are briefly discussed. However, further experiments in this range of temperatures and dose rates are necessary for more quantitative tests of the theory. This reconsideration of the data does not alter the broad conclusion as to the relative insignificance of stored energy in a natural salt formation used as a radioactive waste repository, although more extensive measurements permitting a more exact test of theory would allow better predictions to be made for such applications. (author)

  13. Na7 [Fe2S6 ] , Na2 [FeS2 ] and Na2 [FeSe2 ] : New 'reduced' sodium chalcogenido ferrates

    Science.gov (United States)

    Stüble, Pirmin; Peschke, Simon; Johrendt, Dirk; Röhr, Caroline

    2018-02-01

    Three new 'reduced' FeII containing sodium chalcogenido ferrates were obtained applying a reductive synthetic route. The mixed-valent sulfido ferrate Na7 [Fe2S6 ] , which forms bar-shaped crystals with metallic greenish luster, was synthesized in pure phase from natural pyrite and elemental sodium at a maximum temperature of 800 °C. Its centrosymmetric triclinic structure (SG P 1 bar , a = 764.15(2), b = 1153.70(2), c = 1272.58(3) pm, α = 62.3325 (7) , β = 72.8345 (8) , γ = 84.6394 (8) ° , Z = 3, R1 = 0.0185) exhibits two crystallographically different [Fe2S6 ] 7 - dimers of edge-sharing [FeS4 ] tetrahedra, with somewhat larger Fe-S distances than in the fully oxidized FeIII dimers of e.g. Na6 [Fe2III S6 ] . In contrast to the localized AFM ordered pure di-ferrates(III), the Curie-Weiss behavior of the magnetic susceptibility proves the rarely observed valence-delocalized S = 9/2 state of the mixed-valent FeIII /FeII dimer. The nearly spin-only value of the magnetic moment combined with the chemical bonding not generally differing from that in pure ferrates(II) and (III), provides a striking argument, that the reduction of the local Fe spin moments observed in all condensed sulfido ferrate moieties is connected with the AFM spin ordering. The two isotypic ferrates(II) Na2 [FeS2 ] and Na2 [FeSe2 ] with chain-like structural units (SG Ibam, a = 643.54(8)/ 660.81(1), b = 1140.2(2)/1190.30(2) c = 562.90(6)/585.59(1) pm, Z = 4, R1 = 0.0372/0.0466) crystallize in the K2 [ZnO2 ] -type structure. Although representing merely further members of the common series of chalcogenido metallates(II) Na2 [MIIQ2 ] , these two new phases, together with Na6 [FeS4 ] and Li2 [FeS2 ] , are the only examples of pure FeII alkali chalcogenido ferrates. The new compounds allow for a general comparison of di- and chain ferrates(II) and (III) and mixed-valent analogs concerning the electronic and magnetic properties (including Heisenberg super-exchange and double-exchange interactions

  14. The effect of Na vapor on the Na content of chondrules

    Science.gov (United States)

    Lewis, R. Dean; Lofgren, Gary E.; Franzen, Hugo F.; Windom, Kenneth E.

    1993-01-01

    Chondrules contain higher concentrations of volatiles (Na) than expected for melt droplets in the solar nebula. Recent studies have proposed that chondrules may have formed under non-canonical nebular conditions such as in particle/gas-rich clumps. Such chondrule formation areas may have contained significant Na vapor. To test the hypothesis of whether a Na-rich vapor would minimize Na volatilization reaction rates in a chondrule analog and maintain the Na value of the melt, experiments were designed where a Na-rich vapor could be maintained around the sample. A starting material with a melting point lower that typical chondrules was required to keep the logistics of working with Na volatilization from NaCl within the realm of feasibility. The Knippa basalt, a MgO-rich alkali olivine basalt with a melting temperature of 1325 +/- 5 C and a Na2O content of 3.05 wt%, was used as the chondrule analog. Experiments were conducted in a 1 atm, gas-mixing furnace with the fO2 controlled by a CO/CO2 gas mixture and fixed at the I-W buffer curve. To determine the extent of Na loss from the sample, initial experiments were conducted at high temperatures (1300 C - 1350 C) for duration of up to 72 h without a Na-rich vapor present. Almost all (up to 98%) Na was volatilized in runs of 72 h. Subsequent trials were conducted at 1330 C for 16 h in the presence of a Na-rich vapor, supplied by a NaCl-filled crucible placed in the bottom of the furnace. Succeeding Knudsen cell weight-loss mass-spectrometry analysis of NaCl determined the P(sub Na) for these experimental conditions to be in the 10(exp -6) atm range. This value is considered high for nebula conditions but is still plausible for non-canonical environments. In these trials the Na2O content of the glass was maintained or in some cases increased; Na2O values ranged from 2.62% wt to 4.37% wt. The Na content of chondrules may be controlled by the Na vapor pressure in the chondrule formation region. Most heating events capable

  15. O ATLETISMO NA PERSPECTIVA EDUCACIONAL

    Directory of Open Access Journals (Sweden)

    Leandro Araujo de Sousa

    2017-06-01

    Full Text Available A educação física escolar deve proporcionar experiências aos alunos para o seu desenvolvimento integral. As aulas muitas vezes são reduzidas ao ensino de esportes tradicionais, o que limita o repertório de movimentos dos alunos. Dessa forma o presente estudo de revisão objetiva problematizar o atletismo no ambiente escolar e propor possibilidades pedagógicas para seu ensino. Nesta pesquisa propomos tratar o ensino do atletismo na escola, caracterizando-o pelo seu repertório de movimentos que são naturais ao ser humano, como correr, saltar e lançar, o que possibilita maior praticidade em sua aplicação pedagógica, porém essas possibilidades não são consideradas no ambiente educacional. Diante dos dados encontrados, sugerimos que esse esporte seja abordado de forma multidimensional no ambiente escolar contextualizando-o à visão de algumas correntes teóricas. Nessa perspectiva do esporte educacional, o atletismo pode, assim como deve ser trabalhado nas aulas de educação física como instrumento pedagógico de ensino e auxiliar na formação do aluno de forma global.

  16. Identidades Homossexuais na Territorialidade Tradicionalista

    Directory of Open Access Journals (Sweden)

    Edipo Djavan dos Reis Göergen

    2015-12-01

    Full Text Available Este artigo apresenta o debate teórico que sustenta a pesquisa de mestrado desenvolvida pelo autor. Tendo por base suas vivências em contextos de tradicionalismo gaúcho, o autor deste trabalho tem percebido a grande quantidade de homossexuais, ou indivíduos que se auto-denominam não-heterossexuais, integrando as atividades artísticas do Movimento Tradicionalista Gaúcho, ou a territorialidade tradicionalista. Interessado em investigar tal fenômeno, o autor tem desenvolvido o projeto de pesquisa “Os Espaços Paradoxais de Relações Homoeróticas na Territorialidade Tradicionalista”, sob orientação do prof. Dr. Benhur Pinós da Costa, no Programa de Pós-Graduação em Geografia (UFSM. Para que essa pesquisa seja realizada, levam-se em conta as relações de gênero e de sexualidade que estão envolvidas no tema. Dessa forma, por ainda se tratarem de temáticas tidas como insignificantes na sociedade em geral e marginalizadas no campo científico, para que o presente trabalho fosse empreendido, buscou-se amparo teórico nas geografias feministas e queer, segmentos contemporâneos da ciência geográfica.

  17. Ion-exchange properties of natural mordenite

    International Nuclear Information System (INIS)

    Chelishchev, N.F.; Volodin, V.F.

    1977-01-01

    Ion exchange properties are studied of natural mordenite Si(Al=4.75) exhibiting adequate mechanical characteristics and sufficient resistance to high temperature acids. Consideration is given to the pattern of exchange ions distribution among mordenite and chloride solutions of K, Cs, Rb, Sr. Mordenite shows sharp selectivity towards large alkali metal cations, particularly Cs + . In these processes the exchange isotherms are characterized by the constant selectivity towards a counterion. For the Sr 2+ -2Na + exchange the isotherm shows a change of selectivity after a definite counterion concentration has been reached in the solution. Correlation between the exchange thermodynamic constants makes it possible to propose the following range of mordenite selectivity towards the cations under study: Cs>Rb>K>Na>Sr

  18. Analysis of natural milk and milk powder samples by NAA

    International Nuclear Information System (INIS)

    Al-Jobori, S. M.; Itawi, R. K.; Saad, A; Shihab, K. M.; Jalil, M.; Farhan, S. S.

    1993-01-01

    As a part of the Iraqi food analysis program (IFAP) the concentration of Na, Mg, P, Cl, K, Ca, Zn, Se, Br, Rb, and I in natural milk collected from different regions of Iraq, and in milk powder samples have been determined by using the NAA techniques. It was found that except for the elements I, Rb, and Br the concentrations of the elements was approximately identical in both the natural milk and milk powder. (author)

  19. Analysis of natural milk and milk powder samples by NAA

    International Nuclear Information System (INIS)

    Al-Jobori, S.M.; Itawi, R.K.; Saad, A.; Shihab, K.M.; Jalil, M.; Farhan, S.S.

    1990-01-01

    As a part of the Iraqi Food Analysis Programme the concentration of Na, Mg, P, Cl, K, Ca, Zn, Se, Br, Rb and I in natural milk collected from different regions of Iraq, and in milk powder samples was determined by NAA technique. It was found that except for the elements I, Rb and Br the concentration of the elements was approximately identical in both natural milk and milk powders. (author) 4 refs.; 3 figs.; 5 tabs

  20. Evaluation of photocatalytic activities of supported catalysts on NaX zeolite or activated charcoal

    Energy Technology Data Exchange (ETDEWEB)

    Brites-Nóbrega, Fernanda F. de [Chemical Engineering Department, Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, CEP 87020-900 Maringá, PR (Brazil); Sanitary and Environmental Engineering Department, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG (Brazil); Polo, Aldino N.B.; Benedetti, Angélica M. [Chemical Engineering Department, Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua da Faculdade, 645, CEP 85903-000 Toledo, PR (Brazil); Leão, Mônica M.D. [Sanitary and Environmental Engineering Department, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG (Brazil); Slusarski-Santana, Veronice, E-mail: veronice.santana@unioeste.br [Chemical Engineering Department, Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua da Faculdade, 645, CEP 85903-000 Toledo, PR (Brazil); Fernandes-Machado, Nádia R.C. [Chemical Engineering Department, Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, CEP 87020-900 Maringá, PR (Brazil)

    2013-12-15

    Highlights: • The synergic effect between ZnO and NaX was positive, which increased its activity. • The best results were obtained at pH 3 and 9 with ZnO/NaX and at pH 3 with Nb{sub 2}O{sub 5}/AC. • High degradation and considerable mineralization were attained with 10% ZnO/NaX. • ZnO and Nb{sub 2}O{sub 5} supported on NaX and AC are promising alternatives as photocatalysts. -- Abstract: This study aimed to evaluate the photocatalytic activity of ZnO and Nb{sub 2}O{sub 5} catalysts, both supported on NaX zeolite and activated charcoal (AC). The synergistic effect between oxide and support and the influence of solution pH (3, 7 and 9) on photocatalytic degradation of reactive blue 5G (C.I. 222) were analyzed. The catalysts Nb{sub 2}O{sub 5}/NaX, Nb{sub 2}O{sub 5}/AC and ZnO/NaX, ZnO/AC with 5 and 10% (wt%) were prepared by wet impregnation. The results showed that the catalysts exhibit quite different structural and textural properties. The synergic effect between ZnO and NaX support was higher than that with the activated charcoal, showing that these catalysts were more efficient. The most photoactive catalyst was 10% ZnO/NaX which showed 100% discoloration of the dye solution at pH 3, 7 and 9 after 0.5, 5 and 2 h of irradiation, respectively. The hydrolytic nature of zeolite favored the formation of surface hydroxyl radicals, which increased the activity of the photocatalyst. Thus, catalysts supported on NaX zeolite are promising for use in photocatalysis.

  1. Relationship between intracellular Na+ concentration and reduced Na+ affinity in Na+,K+-ATPase mutants causing neurological disease

    DEFF Research Database (Denmark)

    Toustrup-Jensen, Mads Schak; Einholm, Anja P.; Schack, Vivien

    The neurological disorders familial hemiplegic migraine type 2 (FHM2), alternating hemiplegia of childhood (AHC), and rapid-onset dystonia parkinsonism (RDP) are caused by mutations of Na+,K+-ATPase α2 and α3 isoforms, expressed in glial and neuronal cells, respectively. Although these disorders......, addressing the question to what extent they cause a change of the intracellular Na+ and K+ concentrations ([Na+]i and [K+]i) in COS cells. C-terminal extension mutants generally showed dramatically reduced Na+ affinity without disturbance of K+ binding, as did other RDP mutants. No phosphorylation from ATP...

  2. Inhibitory efficacy of bufadienolides on Na+,K+-pump activity versus cell proliferation.

    Science.gov (United States)

    Xu, Yinfang; Liu, Xuan; Schwarz, Silvia; Hu, Lihong; Guo, Dean; Gu, Quanbao; Schwarz, Wolfgang

    2016-07-01

    Bufadienolides are cytotoxic drugs that may form the basis for anticancer agents. Due to structural and functional similarity to cardiotonic glycosides, application is restricted. We, therefore, investigated correlation of their putative anticancer effects with inhibition of Na + ,K + pumps. The natural bufalin and three derivatives were tested. The anticancer effects of the drugs were checked by observing their inhibitory effects on proliferation of rat liver cancer cells using MTT assay. Inhibition of Na + ,K + -pump was determined by measuring pump-mediated current of rat α1/β1 and α2/β1 Na + ,K + pumps expressed in Xenopus oocytes. All tested bufadienolides inhibited cell proliferation and Na + ,K + pump activity. An activity coefficient A =100x IC 50 Na,K pump /IC 50 pr o liferation was used to describe drug effectivity as anticancer drug. Natural bufalin exhibited lowest effectivity on cell proliferation, and also the A value for rat α1 isoform was the lowest (0.08), the α2 isoform was much less sensitive ( A =1.00). The highest A values were obtained for the BF238 derivative with A =0.88 and 2.64 for the α1 and α2 isoforms, respectively. Therefore, we suggest that search for bufalin derivatives with high anticancer effect and low affinity for both Na + ,K + pump isoforms may be a promising strategy for development of anticancer drugs.

  3. Fotografia na Imprensa: conflitos na câmara escura

    Directory of Open Access Journals (Sweden)

    José Lúcio da Silva Menezes

    2014-07-01

    Full Text Available Este artigo recupera o teor ideológico do discurso que a Revista Veja elaborou sobre a classe trabalhadora que emergiu no cenário brasileiro, no final da década de 1970. O destaque dado aos trabalhadores como temática central resgatada, deve-se aos movimentos grevistas por eles encetados, após anos de ocultamento de sua resistência sob a repressão da ditadura civil-militar (1964-1985. Com a rebeldia operária, as matérias a respeito deste grupo, na Revista,foram se tornando mais constantes e visíveis, pois já não era mais possível, para a Revista Veja, ignorar a existência da classe operária que, com a força insurgente das greves, ocupava as ruas do Brasil.

  4. Uso da papaína na úlcera plantar

    OpenAIRE

    Otuka, Elizabet Shizue; Pedrazzani, Elisete Silva; Pioto, Mariangela Pedroso

    1996-01-01

    Este trabalho teve por objetivo contribuir para a diminuição da incapacidade em hanseníase e as contínuas recidivas de úceras plantares, através da utilização de um método de tratamento com o uso da papaína e ações de educação em saúde. Foi realizado em um Centro de Saúde com pacientes que apresentavam úcera plantar e que concordaram em participar do tratamento proposto. Analisando e comparando os dados obtidos antes e após o tratamento, concluímos que durante o tratamento foi observada uma m...

  5. Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora, in the Central Amazonia Padrão geográfico de diversidade genética em populações naturais de Pau-rosa (Aniba rosaeodora, na Amazônia Central

    Directory of Open Access Journals (Sweden)

    Ronaldo Pereira Santos

    2008-01-01

    Full Text Available Rosewood (Aniba rosaeodora Ducke, Lauraceae is an Amazonian evergreen tree and a source of the purest linalool, the main component of its essential oil, which is very valuable in the international perfumery market. After decades of over-exploitation it is currently considered as threatened. We evaluated the genetic diversity and its distribution in four populations in Central Amazonia. Thirty-five reliable RAPD markers were generated, of which 32 were polymorphic (91.4%. Variation was higher within the populations (76.5%; p O Pau-rosa (Aniba rosaeodora Ducke, Lauraceae é uma árvore amazônica fonte do mais puro linalol, o qual é o principal componente do seu óleo essencial e muito valioso no mercado internacional de perfumaria. Após várias décadas de intensa exploração, a espécie foi levada à categoria de ameaçada de extinção. Quatro populações naturais distribuídas na bacia Amazônia Central foram avaliadas quanto ao nível e a distribuição da diversidade genética. Trinta e cinco marcadores RAPD reprodutíveis foram gerados, dos quais 32 foram polimórficos (91,4%. A diversidade foi maior dentro das populações (76,5%; p < 0,0001 e a distribuição geográfica contribuiu para a diferenciação entre as populações (23,4%; p < 0,0001. A AMOVA indicou que pode haver uma influência parcial do Rio Amazonas no fluxo gênico (3,3%; p < 0,0001, mas foram identificadas evidências de fluxo gênico atravessando o rio. Houve diferenças significativas nas freqüências dos marcadores (p < 0,05 e o fluxo gênico estimado foi relativamente baixo (Nm = 2,02. A correlação entre a distância genética e o fluxo gênico foi de - 0,95 (p = 0,06 e para a distância geográfica e o fluxo gênico foi de - 0,78 (p = 0,12. Houve um padrão geográfico de variabilidade ao longo do eixo Leste - Oeste, influenciado também pelo Rio Amazonas, o que sugere que o rio poderia funcionar como uma barreira para o fluxo gênico. Apesar de amea

  6. Na and K dependence of the Na/K pump in cystic fibrosis fibroblasts.

    OpenAIRE

    Reznik, V M; Schneider, J A; Mendoza, S A

    1981-01-01

    The Na and K dependence of the Na/K pump was measured in skin fibroblasts from patients with cystic fibrosis and age/sex-matched controls. Under basal conditions, there was no difference between control and cystic fibrosis cells in protein per cell, intracellular Na and K content, or Na/K pump activity (measured as ouabain-sensitive 86Rb uptake). There was no difference in the Na dependence of the Na/K pump between cystic fibrosis cells and control cells. In cells from patients with cystic fi...

  7. Vpliv toplotnih mostov na porabo energije za ogrevanje na primeru osnovne šole

    OpenAIRE

    Megušar, Primož

    2015-01-01

    Na primeru Osnovne šole Dobrova sem preveril, kakšen vpliv imajo dejanski toplotni mostovi na porabo energije za ogrevanje. Iz načrtov stavbe sem evidentiral vse toplotne mostove, kateri vplivajo na porabo energije. Tem toplotnim mostovom sem nato v standardu SIST EN ISO 14683 poiskal ustrezne približke. Nato sem s programom TOST izvedel tri simulacije. V prvem primeru toplotnih mostov nisem upošteval. V drugem primeru sem toplotne mostove upošteval na poenostavljen način, v zadnjem primeru p...

  8. Diffusion and the dynamics of displacive phase transitions in cryolite (Na3AlF6) and chiolite (Na5Al3F14): Multi-nuclear NMR studies

    Science.gov (United States)

    Spearing, Dane R.; Stebbins, Jonathan F.; Farnan, Ian

    1994-10-01

    Cryolite is a mixed-cation perovskite (Na2(NaAl)F6) which undergoes a monoclinic to orthorhombic displacive phase transition at ˜550° C. Chiolite (Na5Al3F14) is associated with cryolite in natural deposits, and consists of sheets of corner sharing [AlF6] octahedra interlayered with edge-sharing [NaF6] octahedra. Multi-nuclear NMR line shape and relaxation time (T1) studies were performed on cryolite and chiolite in order to gain a better understanding of the atomic motions associated with the phase transition in cryolite, and Na diffusion in cryolite and chiolite. 27Al, 23Na, and 19F static NMR spectra and T1's in cryolite suggest that oscillatory motions of the [AlF6] octahedra among four micro-twin and anti-phase domains in α-cryolite begin at least 150° C below the transition temperature and persist above it. Variable temperature 23Na MAS NMR further indicates diffusional exchange at a rate of at least 13 kHz between the Na sites by the time the transition temperature is reached. 27Al and 23Na T1's show the same behavior with increasing temperature, indicating the same relaxation mechanisms are responsible for both. The first order nature of the cryolite transition is apparent as a jump in the 23Na and 27Al T1's. Above the transition temperature, the T1's decrease slightly indicating that the motions responsible for the drop in T1, are still present above the transition, further supporting the dynamic nature of the high temperature phase of cryolite. Chiolite 23Na static spectra decrease in linewidth with increasing temperature, indicating increased Na diffusion, which is interpreted as occurring within the [NaF6] sheets in the chiolite structure, but not between the two different Na sites. 27Al and 23Na T1's show similar behavior as in cryolite, but there is no discontinuity due to a phase transition. 19F T1's are constant from room temperature to 150° C indicating no oscillatory motion of the [AlF6] octahedra in chiolite.

  9. Low-spin states of 23Na

    International Nuclear Information System (INIS)

    Bakkum, E.L.

    1987-01-01

    A study of 23 Na via the 22 Ne(p,γ) 23 Na and 23 Na(γ,γ) 23 Na reactions is presented. Only a limited number of resonances has been studied, selected on the basis of strong excitation of the lowest levels of which the spin was unknown. As a result the spins are now known of all levels of 23 Na with excitation energies up to 7 MeV, except for a few high-spin states which are too weakly excited in the decay of the known 22 Ne(p,γ) resonances. The mean lifetimes of the 23 Na levels at 4.43 and 7.89 MeV were found to be 350±70 and 220±17 attoseconds (1 attosecond = 10 -18 seconds) respectively. 97 refs.; 22 figs.; 12 tabs

  10. Phase transitions on dehydration of the natural zeolite thomsonite

    DEFF Research Database (Denmark)

    Ståhl, Kenny

    2001-01-01

    The dehydration of the natural zeolite thomsonite, Na4CasAl20Si20O80 24H(2)O, has been studied using a combination of conventional and synchrotron X-ray powder diffraction. A preliminary in situ dehydration study revealed two distinct unit cell changes at approximately 540 and 570 K, respectively...

  11. Variability salt stress response analysis of Tunisian natural ...

    African Journals Online (AJOL)

    We evaluated the responses to salt stress of 106 Medicago truncatula lines from 11 Tunisian natural populations collected from areas that varied in soil composition, salinity and water availability. Five references lines were also included in this study. Plants were cultivated in two treatments (0 and 50 mM of NaCl) during a ...

  12. Synergistic kinetic inhibition of natural gas hydrate formation

    DEFF Research Database (Denmark)

    Daraboina, Nagu; Malmos, Christine; von Solms, Nicolas

    2013-01-01

    Rocking cells were used to investigate the natural gas hydrate formation and decomposition in the presence of kinetic inhibitor, Luvicap. In addition, the influence of poly ethylene oxide (PEO) and NaCl on the performance of Luvicap was investigated using temperature ramping and isothermal...

  13. PRIMERJAVA GEODETSKIH METOD NA ZAHTEVNEM GRADBENEM OBJEKTU

    OpenAIRE

    Reberčnik, Matic

    2017-01-01

    V projektni nalogi smo v uvodnih poglavjih predstavili različne načine izvajanja geodetskih meritev, ki jih v gradbeništvu uporabljamo pri analizi pomikov in deformacij gradbenih konstrukcij ter terena, na katerem so le-te postavljene. V nadaljevanju opisujemo terestične in GNSS (globalni navigacijski satelitski sistem) metode, ki smo jih uporabljali pri izvajanju meritev na izbranem premostitvenem objektu avtocestnega odseka v Sloveniji (zaradi varovanja podatkov ga imenujemo Objekt 1). Pod...

  14. AÇÃO CIVIL PÚBLICA SOBRE ÁREA DE RESERVA LEGAL: (DESNECESSIDADE DO SEU REGISTRO NA MATRÍCULA DO IMÓVEL / CIVIL ACTION PUBLIC ON AREA OF LEGAL NATURE RESERVES: (NO NEED OF ITS REGISTRY IN THE PROPERTY RECORD

    Directory of Open Access Journals (Sweden)

    Carlos José Cordeiro

    2016-04-01

    Full Text Available It is aimed to show our position on the (no need of the civil action filing the record in property, subject of the registration of the demand that is intended to be obliged to institute legal nature reserve area, making use, therefore, of the adoption of hypothetical deductive method, combined with the execution of theoretical and documentary research. Legal Nature Reserve is understood as the area of rural land that can not suffer human intervention by deforestation and exploitation of its resources. Its institution and subsequent registration with the Rural Environmental Registry is an propter rem obligation, given the tracking of it and the attachment to the holder of real right. It must be obeyed even that forests or other type of vegetation no longer exist in the property, which thus externalizes its institution being a mandatory requirement for regular registration of the property, making it impossible to any claim of its ignorance, because it clings to the ownership of the property, passing to new owners, they being able to be charged regardless of their proceeding.

  15. Preliminary technical and economic viability for the implantation of fluvial transport of CNG (Compressed Natural Gas) for barges in Amazon Region; Avaliacao preliminar de viabilidade tecnico-economica para implantacao de transporte fluvial de GNC (Gas Natual Comprimido) por barcacas na Regiao Amazonica

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Marcos C.C. de; Porto, Paulo L. Lemgruber [Interocean Engenharia e Ship Management, Rio de janeiro, RJ (Brazil); Cunha, Rafael H. da [Metro Rio, RJ (Brazil); Garcia, Rafael M. [Pic Brasil (Brazil); Almeida, Marco A.R. de [Universidade Gama Filho (UGF), Rio de Janeiro, RJ (Brazil)

    2004-07-01

    The isolated regions of the Amazon present difficulties for integration with the electrical system which is creating some economic problems due to the consequent costs of electric generation of subsidies as a function of the fossil fuel use as oils diesel and fuel. A viable option is the use of Natural Gas - NG that is Also available in the region. Its modal of transport possible in the Region North they are for gas-lines or barges. The Compressed Natural Gas transport is distinguished that - CNG for barges was still not tested operationally in Brazil. Soon, to develop a Preliminary Study of Viability Technician - Economic - SVTE for the implantation of fluvial transport of CNG between the cities of Coari and Manaus is basic, therefore it is created strategical alternative for the electric generation in this region. The electric sector, the characteristics of the NG and the transport in this region had been analyzed to support to the work. The gas line and the fluvial transport of CNG for barges in this region are not conflicting, and they in a complementary form can act. The SVTE presented a Liquid Present Value and Internal Tax of very attractive Return justifying its implantation. (author)

  16. Breast reconstruction - natural tissue

    Science.gov (United States)

    ... flap; TRAM; Latissimus muscle flap with a breast implant; DIEP flap; DIEAP flap; Gluteal free flap; Transverse upper gracilis flap; TUG; Mastectomy - breast reconstruction with natural tissue; Breast cancer - breast reconstruction with natural tissue

  17. Natural short sleeper

    Science.gov (United States)

    Sleep - natural short sleeper ... 7 to 9 hours of sleep each night. Short sleepers sleep less than 75% of what is normal for their age. Natural short sleepers are different from people who chronically do ...

  18. Vermont Natural Resources Atlas

    Data.gov (United States)

    Vermont Center for Geographic Information — The purpose of the�Natural Resources Atlas�is to provide geographic information about environmental features and sites that the Vermont Agency of Natural Resources...

  19. Natural Weathering Exposure Station

    Data.gov (United States)

    Federal Laboratory Consortium — The Corps of Engineers' Treat Island Natural Weathering Exposure Station is a long-term natural weathering facility used to study concrete durability. Located on the...

  20. Spatial distribution of Na+-K+-ATPase in dendritic spines dissected by nanoscale superresolution STED microscopy

    Directory of Open Access Journals (Sweden)

    Bondar Alexander

    2011-01-01

    Full Text Available Abstract Background The Na+,K+-ATPase plays an important role for ion homeostasis in virtually all mammalian cells, including neurons. Despite this, there is as yet little known about the isoform specific distribution in neurons. Results With help of superresolving stimulated emission depletion microscopy the spatial distribution of Na+,K+-ATPase in dendritic spines of cultured striatum neurons have been dissected. The found compartmentalized distribution provides a strong evidence for the confinement of neuronal Na+,K+-ATPase (α3 isoform in the postsynaptic region of the spine. Conclusions A compartmentalized distribution may have implications for the generation of local sodium gradients within the spine and for the structural and functional interaction between the sodium pump and other synaptic proteins. Superresolution microscopy has thus opened up a new perspective to elucidate the nature of the physiological function, regulation and signaling role of Na+,K+-ATPase from its topological distribution in dendritic spines.

  1. A Ruddlesden-Popper-type layered perovskite, Na2Ca2Nb4O13

    International Nuclear Information System (INIS)

    Chiba, K.; Ishizawa, N.; Oishi, S.

    1999-01-01

    Single crystals of disodium dicalcium tetraniobium tridecaoxide, Na 2 Ca 2 Nb 4 O 13 , were grown by the flux method. The structure was determined in space group Bb2 1 m. Perovskite-type layers with the formula [(Ca 2 Na)Nb 4 O 13 ] - are concatenated by Na + cations near the interlayer, forming a Ruddlesden-Popper-type structure. The interlayer structure, composed of Na and O atoms, can be regarded as a rocksalt-type. NbO 6 octahedra are tilted about [010] and [001]. The off-centre displacement of Nb atoms suggests a ferroelectric nature along [010], with a calculated magnitude of polarization of 0.12 C m -2 . (orig.)

  2. Bulk crystal growth and electronic characterization of the 3D Dirac semimetal Na3Bi

    Directory of Open Access Journals (Sweden)

    Satya K. Kushwaha

    2015-04-01

    Full Text Available High quality hexagon plate-like Na3Bi crystals with large (001 plane surfaces were grown from a molten Na flux. The freshly cleaved crystals were analyzed by low temperature scanning tunneling microscopy and angle-resolved photoemission spectroscopy, allowing for the characterization of the three-dimensional (3D Dirac semimetal (TDS behavior and the observation of the topological surface states. Landau levels were observed, and the energy-momentum relations exhibited a linear dispersion relationship, characteristic of the 3D TDS nature of Na3Bi. In transport measurements on Na3Bi crystals, the linear magnetoresistance and Shubnikov-de Haas quantum oscillations are observed for the first time.

  3. Natural gas annual 1995

    International Nuclear Information System (INIS)

    1996-11-01

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1995 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1991 to 1995 for each Census Division and each State. Annual historical data are shown at the national level

  4. Natural gas annual 1993

    International Nuclear Information System (INIS)

    1994-01-01

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1993 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. Tables summarizing natural gas supply and disposition from 1989 to 1993 are given for each Census Division and each State. Annual historical data are shown at the national level

  5. Natural gas annual 1991

    International Nuclear Information System (INIS)

    1992-01-01

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1991 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. Tables summarizing natural gas supply and disposition form 1987 to 1991 are given for each Census Division and each State. Annual historical data are shown at the national level

  6. Pioneering instrumentation aspects of NA60

    International Nuclear Information System (INIS)

    David, Andre

    2004-01-01

    NA60 is taking data with proton and heavy-ion beams at the CERN SPS. Although building up on previous experiments, the dimuon physics programme of NA60 places very demanding requirements on its new detectors, in terms of radiation tolerance, granularity and read-out electronics speed. We start by comparing dimuon detection strategies in NA60 with those of previous experiments. We then describe the new detectors used in NA60, placing particular emphasis on their technological pioneering aspects as well as on their contributions to the overall physics performance of the experiment

  7. Fabrication of implanted $^{22}$Na targets

    CERN Multimedia

    2002-01-01

    A knowledge of the $^{22}$Na(p,$\\gamma$)$^{23}$ Mg reaction rate is of significant astrophysical interest. In order to complete previous studies of this reaction, radioactive $^{22}$Na targets of high purity are required. We ask for support to fabricate these targets via the implantation technique at ISOLDE GPS (off—line mode) using $^{22}$Na nuclides in an Al matrix produced in Nov. 1990 at the PSI (Zürich). The $^{22}$Na nuclides are released and ionized in a surface ionisation source, mass-analyzed at ISOLDE GPS, and implanted in a Ni-Ta backing and a C—foil in a special implantation setup.

  8. OGLAŠEVANJE NA FACEBOOKU V SLOVENIJI

    OpenAIRE

    Dobnik, Monja

    2013-01-01

    Danes so zahvaljujoč napredni mobilni tehnologiji družbena omrežja z nami na vsakem koraku. Facebook (FB) se po priljubljenosti uvršča v sam vrh družbenih omrežij in glede na to, da ga uporablja že več kot milijarda zemljanov, ponuja tudi odlične trg za oglaševanje. To so ugotovili tudi slovenski podjetniki. V diplomski nalogi je predstavljeno, kako na FB oglašujejo nekatera slovenska podjetja, s pomočjo spletnega vprašalnika pa je ugotovljeno tudi, kaj o oglasih na FB menijo njegovi uporabni...

  9. Natural gas for vehicles

    International Nuclear Information System (INIS)

    Prieur, A.

    2006-01-01

    Following a decade-long upsurge in the use of natural gas in the energy sector (heating and especially electricity), new outlets for natural gas are being developed in the transport sector. For countries endowed with substantial local resources, development in this sector can help reduce oil dependence. In addition, natural gas is often used to reduce pollution, particularly in cities

  10. Natural gas annual 1991

    International Nuclear Information System (INIS)

    1993-01-01

    The Natural Gas Annual 1991 provides information on the supply and disposition of natural gas to a wide audience including industry, consumers Federal and State agencies, and education institutions. This report, the Natural Gas Annual 1991 Supplement: Company Profiles, presents a detailed profile of selected companies

  11. Naturalisms and religion

    NARCIS (Netherlands)

    Drees, Willem

    1997-01-01

    Such terms as materialism, naturalism, and near synonyms evoke strong negative reactions among many believers. However, the notion of naturalism has various meanings; implications for religion differ for the several varieties of naturalism. In this paper I analyze epistemological and ontological

  12. NATURAL GAS TRANSPORTATION

    OpenAIRE

    Stanis³aw Brzeziñski

    2007-01-01

    In the paper, Author presents chosen aspects of natural gas transportation within global market. Natural gas transportation is a technicaly complicated and economicly expensive process; in infrastructure construction and activities costs. The paper also considers last and proposed initiatives in natural gas transportation.

  13. Entrada vocabular na linguagem virtual

    OpenAIRE

    Macedo, Valdete Aparecida Xavier de [UNESP

    2002-01-01

    O objetivo deste trabalho foi o de fazer um estudo sobre a projeção do inglês, língua universal, sobre a portuguesa, considerando-se os empréstimos lexicais, porta de entrada para a configuração e enriquecimento vocabular da língua de chegada. Estes vocábulos são indicativos ao vocabulário da língua de especialidade, divulgados nos programas da Internet. Fizemos uma pequena reflexão sobre o fenômeno da linguagem virtual, que vem se cristalizando em discurso interativo de povos e nações coloca...

  14. Zbigniew Herbert, Znaki na papierze

    Directory of Open Access Journals (Sweden)

    Thibault Deleixhe

    2008-10-01

    Full Text Available Dans une interview, Zbigniew Herbert confiait : « Mon travail préparatoire à un livre, ce sont avant tout des dessins. Je ne fais pas de photos, cela simplifierait mon contact avec l’objet. » Il n’en fallait pas moins pour donner aux éditions Bosz l’envie d’un projet : réunir ces précieuses esquisses de travail et les confronter aux textes qui en sont nés. Le résultat s’intitule Znaki na papierze (Signes sur papier et appartient aux objets que l’on est fier de posséder dans sa bibliothèque. ...

  15. O consumo na vida digital

    Directory of Open Access Journals (Sweden)

    Iuri Yudi Furukita Baptista

    2016-02-01

    Full Text Available O modelo de consumo não possui as mesmas características sempre: suas relações, motivações, formatos, espaços, interesses e atividades são construções sociais que se modificam atreladas ao cenário econômico, político e tecnológico. O presente trabalho repassa o surgimento da sociedade do consumidor para então conjecturar sobre as propriedades distintivas do consumo na vida digital. O que se defende ao final é que o consumidor já não se restringe ao papel de consumir.

  16. Odpowiedź na pytanie

    Directory of Open Access Journals (Sweden)

    Michel Foucault

    2016-12-01

    Full Text Available Prezentowany artykuł Michela Foucaulta został opublikowany w 1963 roku. Foucault rozwija w nim koncepcję archeologii wiedzy – metody analizy historycznych dyskursów, którą zaprezentuje w sześć lat później w książce o tym właśnie tytule. Artykuł powstał na kanwie pytania wybranego przez autora spośród zadanych mu przez redakcję „Esprit”, które dotyczyło możliwości pojęciowego opracowania przymusu systemu dyskursywnego przy jednoczesnym zaakcentowaniu nieciągłości w jego obrębie a tym samym możliwości twórczego działania w historii ducha. A także, czy tak sformułowana aporia zakładałaby z konieczności zgodę na przymus systemu lub afirmację siły zdolnej do przekształcenia go za pomocą zewnętrznej przemocy? Tekst jest wprawką do sformułowania dojrzałej teorii dyskursu, rodzajem autoanalizy, która pozwala Foucaultowi powiązać własną metodę historyczną z „progresywistyczną polityką” myśli i rozwiązać w ten sposób dylemat pełnej determinacji i wolnego sprawstwa obecny w rozważaniach wielu strukturalistów.

  17. O crescimento da Nectandra megapotamica Mez., em floresta nativa na depressão central do Estado do Rio Grande do Sul The growth of the Nectandra megapotamica Mez., in natural forest in the central depression of the State of the Rio grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Helio Tonini

    2003-02-01

    Full Text Available Este trabalho foi realizado com o objetivo de estudar o crescimento em diâmetro, volume comercial, fator de forma comercial e incremento corrente anual do volume comercial em porcentagem (ICA% para duas árvores dominantes de canela-preta (Nectandra megapotamica, em uma Floresta Estacional Decidual, localizada no município de Santa Maria na depressão central do Estado do Rio Grande do Sul. Os dados foram obtidos mediante análise de tronco e as tendências de crescimento em diâmetro, volume comercial, fator de forma e ICA%, foram ajustados com a utilização dos modelos de Mitscherlich & Sontag (1982, Backman (1943, Richards (1959, e um modelo parabólico do segundo grau. O ajuste dos modelos indicou que, para as variáveis diâmetro e volume comercial, o melhor modelo foi o de Mitscherlich & Sontag, para a árvore 1,sendo que, para a árvore 2, o modelo de Richards apresentou melhor ajuste. Para o incremento corrente anual do volume comercial em porcentagem, o melhor modelo foi o de Backmam, sendo o modelo parabólico, o de melhor ajuste para o fator de forma comercial.This work was carried out with the objective of studying the growth in diameter, commercial volume, form factor, mean annual increment of the commercial volume in percentage for two dominant trees of Nectandra megapotamica, in a Decidual Seasonal Forest, located in the municipal district of Santa Maria in the central depression of the State of Rio Grande do Sul, Brazil. The data were obtained from stem analysis and the growth trend in diameter, commercial volume, form factor and mean annual increment of the commercial volume in percentage, were fitted using the models of Mitscherlich & Sontag (1982, Backman (1943, Richards (1959, and a second degree parabolic model. The adjustment of the models indicated that for the diameter and commercial volume, the best model was that one from Mitscherlich & Sontag, for tree number one and for tree number two, the Richard's model

  18. Effect of salts (NaCl and Na2CO3) on callus and suspension culture of Stevia rebaudiana for Steviol glycoside production.

    Science.gov (United States)

    Gupta, Pratibha; Sharma, Satyawati; Saxena, Sanjay

    2014-03-01

    Steviol glycosides are natural non-caloric sweeteners which are extracted from the leaves of Stevia rebaudiana plant. Present study deals the effect of salts (NaCl and Na2CO3) on callus and suspension culture of Stevia plant for steviol glycoside (SGs) production. Yellow-green and compact calli obtained from in vitro raised Stevia leaves sub-cultured on MS medium supplemented with 2.0 mg l(-1) NAA and different concentrations of NaCl (0.05-0.20%) and Na2CO3 (0.0125-0.10%) for 2 weeks, and incubated at 24 ± 1 °C and 22.4 μmol m(-2) s(-1) light intensity provided by white fluorescent tubes for 16 h. Callus and suspension biomass cultured on salts showed less growth as well as browning of medium when compared with control. Quantification of SGs content in callus culture (collected on 15th day) and suspension cultures (collected at 10th and 15th days) treated with and without salts were analyzed by HPLC. It was found that abiotic stress induced by the salts increased the concentration of SGs significantly. In callus, the quantity of SGs got increased from 0.27 (control) to 1.43 and 1.57% with 0.10% NaCl, and 0.025% Na2CO3, respectively. However, in case of suspension culture, the same concentrations of NaCl and Na2CO3 enhanced the SGs content from 1.36 (control) to 2.61 and 5.14%, respectively, on the 10th day.

  19. The effect of CaNa{sub 2}EDTA on excretion of {sup 210}PB, {sup 210}Po and stable lead in cases of chronic lead intoxication

    Energy Technology Data Exchange (ETDEWEB)

    Knezevic, I.; Milacic, S.; Novak, Lj.; Uzelac, V.; Nesic, V

    1998-07-01

    The study describes the effect of CaNa{sub 2}EDTA on the excretion of the naturally occurring radionuclides {sup 210}Pb, {sup 210}Po and stable lead in workers' urine. The CaNa{sub 2}EDTA was administered intravenously to workers in the morning for five days. The results show that CaNa{sub 2}EDTA mobilises biologically active {sup 210}Pb, {sup 210}Po and stable lead, appreciably increasing their concentration in urine. (author)

  20. Algoritmos evolucionários na determinação da configuração de custo mínimo de sistemas de co-geração de energia com base no gás natural

    Directory of Open Access Journals (Sweden)

    Marco César Goldbarg

    2005-08-01

    Full Text Available Esse trabalho apresenta um caso especial do problema geral da determinação de uma configuração para um sistema de co-geração de energia que utiliza o gás natural como fonte energética. O problema visa determinar a configuração de custo mínimo de um sistema de co-geração. É um problema computacionalmente difícil devido a restrições técnicas, operacionais e econômicas. Para solucioná-lo, são apresentados e comparados algoritmos evolucionários desenvolvidos de acordo com as metáforas dos Algoritmos Genéticos, Algoritmos Meméticos e da Transgenética Computacional. Os algoritmos são aplicados a um conjunto de trinta e cinco instâncias geradas de acordo com cinco diferentes ciclos de co-geração. Os experimentos computacionais relatados nesse trabalho indicam uma dominância de melhores resultados da metáfora transgenética.This work presents a special case of the general problem of determining the configuration of cogeneration systems in which the primary source of energy is natural gas. The objective is to determine the configuration with the minimum cost. Technical, operational and economic features impose constraints to the problem making it computationally hard to solve. Evolutionary algorithms based upon genetic, memetic and transgenetic algorithms are presented to solve the problem. A computational experiment with thirty-five instances generated in accordance with five distinct cogeneration cycles is reported. The results show that the transgenetic algorithm exhibits an overall best performance.

  1. Supervisory utilization as a support information instrument of the data base acquisition and availability by Intranet and Internet natural gas micro-cogeneration; Utilizacao de um supervisorio como ferramenta de suporte de informacoes na aquisicao e disponibilizacao dos dados via Intranet e Internet de um sistema de micro-cogeracao de energia

    Energy Technology Data Exchange (ETDEWEB)

    Camara, Paulo; Sousa, Walter [Centro de Tecnologias do Gas (CTGAS), Natal, RN (Brazil); Petch, Moacir; Diogenes, Pedro; Carrasco, Benjamim [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The globalization effects intensify the information of technology's usage, not only on the creation of new products and processes, as well, support to operation of new equipment. The Information Technology turns to being more penetrating in the companies' activities, making and changing paradigms and, consequently, in the way how information is conceived. In the partnership PETROBRAS, the Centro de Tecnologias do Gas - CTGAS and the group FOCKINK, was developed and has been launched in the brazilian market the first system of generation and micro-cogeneration by natural gas, activated by an engine diesel derivative by natural gas. The prototype is able to make 35 kW/55 kVA of electric energy, 7TR's (84.000 BTU's) of energy for refrigeration and has a capacity of warming 2200 l / h of water in the temperature of 25 deg C until 85 deg C. The equipment utilizes as a monitoring system a supervisor Elipse Scada, produced by Elipse, which is composed by acquisition and monitoring tools that turns possible the creation of screens with graphics to make easier the support, monitoring, activating and variable control, just like: pressure, temperature, electrical and mechanical. The supervisor keeps in touch with (02) two computers: the first, makes the communication with the supervisor system and the other is used to select the information to be able by web, through CTGAS home page. The access by home page of the information about the data on the co-generator will make easier the client's decision for the acquisition of the equipment. The main objective of this work is, through Information Technology is to present an application case of Elipse Scada Software in micro-cogeneration system installed at CTGAS to turn easier the obtainment of this information, change the relations into an integrate changing, expanding frontiers, creating by this way new challenges. (author)

  2. Natural gas marketing II

    International Nuclear Information System (INIS)

    Anon.

    1988-01-01

    This book covers all aspects of gas marketing, from the basic regulatory structure to the latest developments in negotiating agreements and locating markets. Topics include: Federal regulation of the gas industry; Fundamentals of gas marketing contracts; FERC actions encouraging competitive markets; Marketing conditions from the pipelines' perspective; State non-utility regulation of natural gas production, transportation, and marketing; Natural gas wellhead agreements and tariffs; Natural gas processing agreements; Effective management of producer's natural gas contracts; Producer-pipeline litigation; Natural gas purchasing from the perspective of industrial gas users; Gas marketing by co-owners: problems of disproportionate sales, gas balancing, and accounting to royalty owners; Alternatives and new directions in marketing

  3. Nature in Preschool

    DEFF Research Database (Denmark)

    Husted, Mia; Frøkjær, Thorleif

    Nature and nature phenomena’ has formed a specific curriculum theme in Danish preschool since early childhood curriculum was prescribed by law in 2004. However, recent evaluations show that the implementation of an early childhood curriculum has not produced an increased pedagogical focus...... on ‘nature and nature phenomena’ in preschools (EVA 2012). This finding, along with an increased political interest in goals and measurable outcome of early childhood curriculum (Broström 2012), will be the starting point in our ambition to carry out a more thorough qualitative investigation into links...... between preschool teachers’ understanding and interest in teaching nature and the rather poor evaluation....

  4. Temperature dependence of thermal pressure for NaCl

    Science.gov (United States)

    Singh, Chandra K.; Pande, Brijesh K.; Pandey, Anjani K.

    2018-05-01

    Engineering applications of the materials can be explored upto the desired limit of accuracy with the better knowledge of its mechanical and thermal properties such as ductility, brittleness and Thermal Pressure. For the resistance to fracture (K) and plastic deformation (G) the ratio K/G is treated as an indication of ductile or brittle character of solids. In the present work we have tested the condition of ductility and brittleness with the calculated values of K/G for the NaCl. It is concluded that the nature of NaCl can be predicted upto high temperature simply with the knowledge of its elastic stiffness constant only. Thermoelastic properties of materials at high temperature is directly related to thermal pressure and volume expansion of the materials. An expression for the temperature dependence of thermal pressure is formulated using basic thermodynamic identities. It is observed that thermal pressure ΔPth calculated for NaCl by using Kushwah formulation is in good agreement with the experimental values also the thermal pressure increases with the increase in temperature.

  5. Na+/Ca2+ exchange and Na+/K+-ATPase in the heart

    Science.gov (United States)

    Shattock, Michael J; Ottolia, Michela; Bers, Donald M; Blaustein, Mordecai P; Boguslavskyi, Andrii; Bossuyt, Julie; Bridge, John H B; Chen-Izu, Ye; Clancy, Colleen E; Edwards, Andrew; Goldhaber, Joshua; Kaplan, Jack; Lingrel, Jerry B; Pavlovic, Davor; Philipson, Kenneth; Sipido, Karin R; Xie, Zi-Jian

    2015-01-01

    This paper is the third in a series of reviews published in this issue resulting from the University of California Davis Cardiovascular Symposium 2014: Systems approach to understanding cardiac excitation–contraction coupling and arrhythmias: Na+ channel and Na+ transport. The goal of the symposium was to bring together experts in the field to discuss points of consensus and controversy on the topic of sodium in the heart. The present review focuses on cardiac Na+/Ca2+ exchange (NCX) and Na+/K+-ATPase (NKA). While the relevance of Ca2+ homeostasis in cardiac function has been extensively investigated, the role of Na+ regulation in shaping heart function is often overlooked. Small changes in the cytoplasmic Na+ content have multiple effects on the heart by influencing intracellular Ca2+ and pH levels thereby modulating heart contractility. Therefore it is essential for heart cells to maintain Na+ homeostasis. Among the proteins that accomplish this task are the Na+/Ca2+ exchanger (NCX) and the Na+/K+ pump (NKA). By transporting three Na+ ions into the cytoplasm in exchange for one Ca2+ moved out, NCX is one of the main Na+ influx mechanisms in cardiomyocytes. Acting in the opposite direction, NKA moves Na+ ions from the cytoplasm to the extracellular space against their gradient by utilizing the energy released from ATP hydrolysis. A fine balance between these two processes controls the net amount of intracellular Na+ and aberrations in either of these two systems can have a large impact on cardiac contractility. Due to the relevant role of these two proteins in Na+ homeostasis, the emphasis of this review is on recent developments regarding the cardiac Na+/Ca2+ exchanger (NCX1) and Na+/K+ pump and the controversies that still persist in the field. PMID:25772291

  6. Learning from nature: Nature-inspired algorithms

    DEFF Research Database (Denmark)

    Albeanu, Grigore; Madsen, Henrik; Popentiu-Vladicescu, Florin

    2016-01-01

    .), genetic and evolutionary strategies, artificial immune systems etc. Well-known examples of applications include: aircraft wing design, wind turbine design, bionic car, bullet train, optimal decisions related to traffic, appropriate strategies to survive under a well-adapted immune system etc. Based......During last decade, the nature has inspired researchers to develop new algorithms. The largest collection of nature-inspired algorithms is biology-inspired: swarm intelligence (particle swarm optimization, ant colony optimization, cuckoo search, bees' algorithm, bat algorithm, firefly algorithm etc...... on collective social behaviour of organisms, researchers have developed optimization strategies taking into account not only the individuals, but also groups and environment. However, learning from nature, new classes of approaches can be identified, tested and compared against already available algorithms...

  7. First-Year Medical Students' Naïve Beliefs about Respiratory Physiology

    Science.gov (United States)

    Badenhorst, Elmi; Mamede, Silvia; Abrahams, Amaal; Bugarith, Kishor; Friedling, Jacqui; Gunston, Geney; Kelly-Laubscher, Roisin; Schmidt, Henk G.

    2016-01-01

    The present study explored the nature and frequency of physiology naïve beliefs by investigating novices' understanding of the respiratory system. Previous studies have shown considerable misconceptions related to physiology but focused mostly on specific physiological processes of normal respiration. Little is known about novices' broader…

  8. Education reform, race, and politics in Bahia, Brazil Reforma escolar, racismo y políticas locales en Bahia, Brasil Reforma educacional, racial e política na Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Bernd Reiter

    2008-03-01

    educação primária em áreas onde tal acesso era longe de universal. Minha pesquisa também aponta para algumas falhas desta reforma, em particular referente à situação de afro-brasileiros. Racismo estrutural é uma das causas mais indicativas desta falha. Racismo estrutural na Bahia reduz as expectativas de professores e diretores do potencial acadêmico de afro-brasileiros pobres; isto amplia o abismo entre estudantes e diretores, contribuindo para uma alienação mútua destes dois grupos e põe em perigo a criação de alianças estratégicas e sinergias dentro de escolas; o racismo ainda aliena escolas dos seus bairros, obstruindo um envolvimento significativo da comunidade na gestão da escola. Finalmente, o reconhecimento baixo que professores públicos recebem da sociedade como um todo, refletido por baixos salários, e uma falta geral de estruturas institucionais de incentivos capazes de recompensar desempenhos excelentes e sancionar desempenhos deficientes transformou a educação pública baiana num sistema desesperado, onde as motivações de professores e estudantes são sistematicamente negadas e suas esperanças frustradas.

  9. Novel natural food antimicrobials.

    Science.gov (United States)

    Juneja, Vijay K; Dwivedi, Hari P; Yan, Xianghe

    2012-01-01

    Naturally occurring antimicrobial compounds could be applied as food preservatives to protect food quality and extend the shelf life of foods and beverages. These compounds are naturally produced and isolated from various sources, including plants, animals and microorganisms, in which they constitute part of host defense systems. Many naturally occurring compounds, such as nisin, plant essential oils, and natamycin, have been widely studied and are reported to be effective in their potential role as antimicrobial agents against spoilage and pathogenic microorganisms. Although some of these natural antimicrobials are commercially available and applied in food processing, their efficacy, consumer acceptance and regulation are not well defined. This manuscript reviews natural antimicrobial compounds with reference to their applications in food when applied individually or in combination with other hurdles. It also reviews the mechanism of action of selected natural antimicrobials, factors affecting their antimicrobial activities, and future prospects for use of natural antimicrobials in the food industry.

  10. On nature and bioethics.

    Science.gov (United States)

    Peterson, Paul Silas

    2010-01-01

    The account of nature and humanity's relationship to nature are of central importance for bioethics. The Scientific Revolution was a critical development in the history of this question and many contemporary accounts of nature find their beginnings here. While the innovative approach to nature going out of the seventeenth century was reliant upon accounts of nature from the early modern period, the Middle Ages, late-antiquity and antiquity, it also parted ways with some of the understandings of nature from these epochs. Here I analyze this development and suggests that some of the insights from older understandings of nature may be helpful for bioethics today, even if there can be no simple return to them.

  11. Natural radioactivity levels in soils of Fiji

    International Nuclear Information System (INIS)

    Garimella, S.; Kumar, A.; Prasad, U.; Jafar, M.

    1998-01-01

    A 10 cm (diameter) x 7.5 cm NaI(Tl) gamma-ray spectrometer with a low background shield has been used to measure the natural radioactivity levels in soils of Viti Levu, the main island of Fiji. From this, the external gamma-dose which is likely to be delivered to the local population in this region is computed and found to be 99 μGy a -1 . This is well below the world average, but it is comparable to that observed in Marshall Islands and the Micronesia

  12. Natural radioactivity levels in soils of Fiji

    International Nuclear Information System (INIS)

    Garimella, S.; Kumar, A.; Prasad, U.; Jafar, M.

    1998-01-01

    A 10 cm (diameter) x 7.5 cm NaI(TI) gamma-ray spectrometer with a low background shield has been used to measure the natural radioactivity levels in soils of Viti Levu, the main island of Fiji. From this, the external gamma-dose which is likely to be delivered to the local population in this region is computed and found to be 99 microG a -1 . This is well below the world average, but it is comparable to that observed in Marshall Islands and the Micronesia. (author). 17 refs., 3 figs., 5 tabs

  13. Measurements of natural radioactivity inside Dandara temple

    International Nuclear Information System (INIS)

    Ahmed, N.K.; Saied, M.H.; Abbady, A.; El-Kamel, A.H.

    1994-01-01

    The natural radioactivities inside Dandara temple are studied by using a NaI(Tl) scintillation spectrometer. The variation of these activities with location is investigated. Average values of the identified radionuclides inside the halls, sanctuary and crypt of the temple are examined. It is estimated that the mean value lies in the range 37.9-90.1 for 212 Pb, 70.0-36.0 for 214 Bi, 52.6-76.2 for 228 Ac, 1.6-5.9 for 208 Tl, while for 40 K it is 169.3-286.6. (author)

  14. Measurements of natural radioactivity inside Dandara temple

    Energy Technology Data Exchange (ETDEWEB)

    Ahmed, N.K.; Saied, M.H.; Abbady, A.; El-Kamel, A.H. [Assiut Univ. (Egypt). Dept. of Physics

    1994-07-01

    The natural radioactivities inside Dandara temple are studied by using a NaI(Tl) scintillation spectrometer. The variation of these activities with location is investigated. Average values of the identified radionuclides inside the halls, sanctuary and crypt of the temple are examined. It is estimated that the mean value lies in the range 37.9-90.1 for {sup 212}Pb, 70.0-36.0 for {sup 214}Bi, 52.6-76.2 for {sup 228} Ac, 1.6-5.9 for {sup 208} Tl, while for {sup 40}K it is 169.3-286.6. (author).

  15. A Natural Love of Natural Products

    OpenAIRE

    Kingston, David G. I.

    2008-01-01

    Recent research on the chemistry of natural products from the author?s group that led to the receipt of the ACS Ernest Guenther Award in the Chemistry of Natural Products is reviewed. REDOR NMR and synthetic studies established the T-taxol conformation as the bioactive tubulin-binding conformation, and these results were confirmed by the synthesis of compounds which clearly owed their activity or lack of activity to whether or not they could adopt the T-taxol conformation. Similar studies wit...

  16. Influenza neuraminidase: a druggable target for natural products.

    Science.gov (United States)

    Grienke, Ulrike; Schmidtke, Michaela; von Grafenstein, Susanne; Kirchmair, Johannes; Liedl, Klaus R; Rollinger, Judith M

    2012-01-01

    The imminent threat of influenza pandemics and repeatedly reported emergence of new drug-resistant influenza virus strains demonstrate the urgent need for developing innovative and effective antiviral agents for prevention and treatment. At present, influenza neuraminidase (NA), a key enzyme in viral replication, spread, and pathogenesis, is considered to be one of the most promising targets for combating influenza. Despite the substantial medical potential of NA inhibitors (NAIs), only three of these drugs are currently on the market (zanamivir, oseltamivir, and peramivir). Moreover, sudden changes in NAI susceptibility revealed the urgent need in the discovery/identification of novel inhibitors. Nature offers an abundance of biosynthesized compounds comprising chemical scaffolds of high diversity, which present an infinite pool of chemical entities for target-oriented drug discovery in the battle against this highly contagious pathogen. This review illuminates the increasing research efforts of the past decade (2000-2011), focusing on the structure, function and druggability of influenza NA, as well as its inhibition by natural products. Following a critical discussion of publications describing some 150 secondary plant metabolites tested for their inhibitory potential against influenza NA, the impact of three different strategies to identify and develop novel NAIs is presented: (i) bioactivity screening of herbal extracts, (ii) exploitation of empirical knowledge, and (iii) computational approaches. This work addresses the latest developments in theoretical and experimental research on properties of NA that are and will be driving anti-influenza drug development now and in the near future.

  17. Kinetin Reversal of NaCl Effects

    Science.gov (United States)

    Katz, Adriana; Dehan, Klara; Itai, Chanan

    1978-01-01

    Leaf discs of Nicotiana rustica L. were floated on NaCl in the presence of kinetin or abscisic acid. On the 5th day 14CO2 fixation, [3H]leucine incorporation, stomatal conductance, and chlorophyll content were determined. Kinetin either partially or completely reversed the inhibitory effects of NaCl while ABA had no effect. PMID:16660618

  18. Uso de plâncton silvestre, fermento fresco e levedura desidratada na alimentação de larvas do cascudo chinelo, Loricariichthys platymetopon (Isbrüchen & Nijssen, 1979 (Osteichthyes, Loricariidae Natural plankton, fresh ferment and dehydrated yeast utilization at Loricariichthys platymetopon (Isbrüchen & Nijssen, 1979 (Osteichthyes, Loricariidae, cascudo chinelo, fry feeding

    Directory of Open Access Journals (Sweden)

    Claudemir Martins Soares

    2002-05-01

    Full Text Available Objetivando avaliar a utilização de diferentes alimentos para larvas do cascudo chinelo Loricariichthys platymetopon (Osteichthyes, Loricariidae, 240 larvas com cinco dias pós-eclosão foram distribuídas em 20 aquários (12 L. Foram utilizados cinco tratamentos com quatro repetições cada, os quais consistiram do emprego de diferentes tipos de alimentos como: plâncton (P, fermento (F, levedura desidratada (LD e as combinações P+F e P+LD por 15 dias consecutivos. O F e a LD foram fornecidos à vontade três vezes ao dia, enquanto o P foi fornecido pela manhã, após os aquários serem sifonados. Os valores da temperatura, pH, condutividade elétrica e oxigênio dissolvido se mantiveram dentro de níveis aceitáveis para a aquicultura. Os valores de biomassa/aquário das larvas alimentadas com P+LD foram superiores aos dos alimentados com P, F e P+F, entretanto não diferiram daqueles com o uso de LD. As larvas alimentadas com P+LD apresentaram valores de peso final médio superiores às dos demais tratamentos, sendo que F levou a valores de peso final médio inferiores em comparação ao uso de P, LD e P+F. Observou-se menor sobrevivência com o uso de P em comparação a LD e P+LD. Conclui-se que se pode utilizar P+LD na criação do cascudo chinelo em suas fases iniciais de desenvolvimento.Aiming to evaluate different foods effects in the rearing of Loricariichthys platymetopon (Osteichthyes, Loricariidae fry, 240 5-day-after-hatch specimens were distributed in 20 aquarium glasses (12 L. Five treatments, with four repetitions each, were tested, consisting in: plankton (P, fresh ferment (F, dehydrated yeast (DY and the combinations P+F and P+DY, for 15 days. F and DY were given ad libitum three times a day, and P only in the morning, after the aquariums siphoning. Temperature, pH, electric conductivity and dissolved oxygen were in levels acceptable for fish. The fry biomass per aquarium values were higher for the P + DY treatment, when

  19. Negative electrodes for Na-ion batteries.

    Science.gov (United States)

    Dahbi, Mouad; Yabuuchi, Naoaki; Kubota, Kei; Tokiwa, Kazuyasu; Komaba, Shinichi

    2014-08-07

    Research interest in Na-ion batteries has increased rapidly because of the environmental friendliness of sodium compared to lithium. Throughout this Perspective paper, we report and review recent scientific advances in the field of negative electrode materials used for Na-ion batteries. This paper sheds light on negative electrode materials for Na-ion batteries: carbonaceous materials, oxides/phosphates (as sodium insertion materials), sodium alloy/compounds and so on. These electrode materials have different reaction mechanisms for electrochemical sodiation/desodiation processes. Moreover, not only sodiation-active materials but also binders, current collectors, electrolytes and electrode/electrolyte interphase and its stabilization are essential for long cycle life Na-ion batteries. This paper also addresses the prospect of Na-ion batteries as low-cost and long-life batteries with relatively high-energy density as their potential competitive edge over the commercialized Li-ion batteries.

  20. Razvitak naselja na kvarnerskim otocima - primjer Dobrinja

    Directory of Open Access Journals (Sweden)

    Marijan Bradanović

    2012-12-01

    Full Text Available Na dosad slabo poznatom i sa stajališta povijesti umjetnosti još posve neobrađenom primjeru Dobrinja na otoku Krku, raspravlja se o razvitku naselja na kvarnerskim otocima. Uz isticanje štetnosti dosad prevladavajućih uopćavanja, karakteristični položaj i razvitak Dobrinja tumače se u širem, komparativnom kontekstu. Analiziraju se prostiranje i obilježja pojedinih dijelova ovog naselja, a naglasak je na vremenu kasnog srednjeg i ranijeg novog vijeka. Tada je najuži dio povijesnog središta Dobrinja poprimio čvrstu, na tlorisnoj osnovi i danas, usprkos opsežnim pregradnjama i arhitektonskim preinakama, jasno uočljivu, urbanu fizionomiju.

  1. A água na Ilha da Madeira

    Directory of Open Access Journals (Sweden)

    João Manuel de Lemos Baptista

    2014-02-01

    Full Text Available Este artigo aborda a problemaÅLtica da aÅLgua na Madeira, desde a origem do povoamento ateÅL aos nossosdias, com especial atencao para a exploracao e salvaguarda deste recurso natural.Na Madeira, a aÅLgua existe em abunda^ncia, gracas aos fenoÅLmenos climaÅLticos que ocorrem na ilha, devidotambeÅLm ao relevo e a` natureza das rochas serem predominantemente basaÅLlticas (impermeaÅLveis etambeÅLm devido aos investimentos que o Governo Regional tem efetuado, nomeadamente a niÅLvel daexploracao, atraveÅLs da construcao de furos e de galerias para extrair a aÅLgua subterra^nea, como forma desatisfazer as necessidades da populacao no seu todo e dos turistas que nos visitam.Nao obstante, eÅL fundamental continuar com uma gestao equilibrada e sisteÅLmica da aÅLgua, para que nofuturo este liÅLquido continue nas nossas vidas. Felizmente que na Madeira, a empresa de capitaispuÅLblicos IGA – Investimentos e Gestao da AÅLgua, S.A. tem realizado um trabalho excelente em termosde exploracao, tratamento e abastecimentos a`s populacoes da Madeira e do Porto Santo, assim comouma gestao sustentaÅLvel deste recurso.This article discusses the problem of water in the wood, from the origin of the settlement to the presentday, with special attention to the exploitation and protection of this natural resource. In Madeira, waterexists in abundance, thanks to the weather phenomena that occur on the island, also due to relief andthe nature of the rocks are predominantly basaltic (waterproof and also due to the investments thatthe Regional Government has made, particularly in terms of the exploration, through the constructionof boreholes and galleries to extract groundwater as a way to meet the needs of the whole populationand the tourists who visit us.Nevertheless, it is essential to continue with a balanced and systematic management of water, so thatin future this fluid continues in our lives. Fortunately in Madeira, the company —owned IGA

  2. Preparation of Natural Zeolite for Air Dehumidification in Food Drying

    Directory of Open Access Journals (Sweden)

    Mohamad Djaeni

    2015-03-01

    Full Text Available Drying with air dehumidification with solid adsorbent improves the quality of food product as well as energy efficiency. The natural zeolite is one of adsorbent having potential to adsorb the water.  Normally, the material was activated to open the pore, remove the organic impurities, and increase Si/Al rate. Hence, it can enhance the adsorbing capacity. This research studied the activation of natural zeolite mined from Klaten, Indonesia as air dehumidification for food drying. Two different methods were used involving activation by heat and NaOH introduction.  As indicators, the porosity and water loaded were evaluated. Results showed both methods improved the adsorbing capacity significantly. With NaOH, the adsorbing capacity was higher. The simple test in onion and corn drying showed the presence of activated natural zeolite can speed up water evaporation positively. This performance was also comparable with Zeolite 3A

  3. Análise da Fragilidade e Vulnerabilidade Natural dos Terrenos aos Processos Erosivos como Base para o Ordenamento Territorial: o Caso das Bacias do Córrego Carioca, Córrego do Bação e Ribeirão Carioca na Região do Alto Rio das Velhas-MG

    Directory of Open Access Journals (Sweden)

    Clibson Alves dos Santos

    2008-10-01

    Full Text Available As bacias do Córrego Carioca, do Córrego do Bação e do Ribeirão do Carioca fazem parte da bacia do rio Itabirito, tributário no alto rio das Velhas, afluente do Rio São Francisco. Essa região é marcada por intensos processos erosivos, decorrentes do uso inadequado dos solos. Sendo evidenciados diversos conflitos de uso dos terrenos e recursos hídricos, devido ao desenvolvimento da atividade minerária, das atividades industriais, das práticas agropastoris, da crescente ocupação urbana e da expansão imobiliária por condomínios residenciais de classe alta. Nesse trabalho, analisou-se a susceptibilidade natural dos terrenos aos processos erosivos, tendo como base as unidades geomorfológicas definidas por Santoset al. (2006 e os métodos propostos por Crepani et al. (1996; 2001 e Ross (1992; 1994; 2000, visando contribuir no processo de planejamento ambiental e ordenamento territorial dessa região. Os resultados hierarquizam a área segundo o grau de fragilidade e vulnerabilidade aos processos erosivos, que associadas às análises realizadas no presente estudo, constituem-se em ferramentas orientativas no processo de ordenamento territorial das bacias hidrográficas estudadas.

  4. Bullying na Escola: um sofrimento

    Directory of Open Access Journals (Sweden)

    Marlene Silva Sardinha Gurpilhares

    2014-07-01

    Full Text Available O bullying é uma forma de violência presente nas escolas e o termo é utilizado para caracterizar todas as formas de agressões repetitivas psicológicas e físicas, direta ou indiretamente. Esta violência causa sofrimentos, intimidação e medo, sempre numa relação de poder entre pares. Esta pesquisa trata de um estudo do bullying escolar: o que é, como surgiu, como identificá-lo e sua caracterização, conseqüências, causas, o papel da escola, de professores e pais e uma proposta prática que pode ser adotada para sua prevenção e contenção. O objetivo é organizar materiais para leitura dos atores educacionais para uma possível reflexão, através de pesquisas bibliográficas. Esta violência é grave e deveria ser tratada como saúde pública, devido às conseqüências que traz, como queda na aprendizagem, na autoestima e em casos mais graves, até o suicido e outras tragédias. A escola necessita atentar para esse tipo de violência, revendo suas ações em todos os momentos, tendo um olhar integral e diferenciado em relação aos alunos. É fundamental que o bullying não seja tratado como brincadeira de criança e para ser identificado e combatido é necessária uma ação entre a família e todos da escola, que pode ser desenvolvida através de projetos que ajudem a apontar caminhos para a solução do problema. Tais ações devem ser pautadas por constantes debates e reflexões, nas quais o aluno se torne o protagonista. Não existem fórmulas prontas, pois a intervenção deve ser feita através da realidade de cada escola.

  5. Study of the Na-C-O and Na-H-O ternary systems in the sodium rich corner

    International Nuclear Information System (INIS)

    Maupre, J.-P.

    1978-02-01

    The purpose of this study is to provide a contribution to the understanding of the sodium - carbon - oxygen and sodium - hydrogen - oxygen ternary systems in the sodium rich corner. In order to do this the Na-NaH-Na 2 O-NaOH phase diagram was completed and the Na-Na 2 O-Na 2 CO 3 -C phase diagram was outlined. This work is made up of two parts. The first is devoted to a critical literature survey essential to establish correct phase diagrams. The second is an experimental study followed by a discussion collating our finding to the literary data. The basic experimental technique used is differential thermal analysis (DTA) but it has been completed by quenching, X-ray and chemical analysis methods. The proposed phase diagrams imply that Na-NaH-Na 2 O-NaOH and Na-Na 2 O-Na 2 CO 3 -C systems are reciprocal ternary systems. Temperatures of stable pairs reversal are respectively 410 and 690 0 C. The stable pairs are Na-NaOH and Na-Na 2 CO 3 at elevated temperature, Na 2 O-NaH and Na 2 O-C at low temperature [fr

  6. OGLAŠEVANJE NA DRUŽBENIH OMREŽJIH NA PRIMERU FACEBOOKA

    OpenAIRE

    Novak, Martina

    2012-01-01

    V diplomskem delu obravnavamo družbene medije kot novo priložnost za promocijo in oglaševanje podjetij. Spoznali smo družbena omrežja na splošno in nekaj teh, ki jih uporabljamo tudi v Sloveniji na kratko predstavili. Podrobneje smo se osredotočili na družbeno omrežje Facebook, predvsem na samo spletno stran, njen izgled in storitve, ki jih ponuja uporabnikom. V nalogi je podrobneje opisan Facebook kot orodje za uporabo oglaševanja. Spoznali smo brezplačne in plačljive načine promocije in ogl...

  7. Culpa e prazer: imagens do consumo na cultura de massa

    Directory of Open Access Journals (Sweden)

    Everardo Rocha

    2008-09-01

    Full Text Available O objetivo deste artigo é estudar algumas das principais representações do consumo no senso comum e na cultura de massa. Essas representações tendem a classificar o consumo como algo hedonista, ou exercer sobre ele um discurso moralista, ou vê-lo como algo natural ou, ainda, como utilitário. Ao estudar as implica ções ideológicas dessas visões, este artigo pretende contribuir para o estudo do consumo como um sistema cultural central na sociedade moderno-contemporânea. Palavras-chave: Cultura e consumo; cultura de massa e ideologia; Teoria da comunicação; Antropologia do consumo. ABSTRACT The objective of this article is to study some of the main representations of consumption in the general sense and in mass culture. These representations tend to classify consumption as something hedonist, or answer to it with a moralistic rhetoric, or to see it as something natural or even as something utilitarian. While studying the ideological implications of these views, this article intends to contribute to the study of consumption as a central cultural system in the modern contemporary society. Keywords: Culture and consumption; mass culture and ideology; Theory of communication; Anthropology of consumption.

  8. Characteristics of injury and recovery of net NO3- transport of barley seedlings from treatments of NaCl

    Science.gov (United States)

    Klobus, G.; Ward, M. R.; Huffaker, R. C.

    1988-01-01

    The nature of the injury and recovery of nitrate uptake (net uptake) from NaCl stress in young barley (Hordeum vulgare L, var CM 72) seedlings was investigated. Nitrate uptake was inhibited rapidly by NaCl, within 1 minute after exposure to 200 millimolar NaCl. The duration of exposure to saline conditions determined the time of recovery of NO3- uptake from NaCl stress. Recovery was dependent on the presence of NO3- and was inhibited by cycloheximide, 6-methylpurine, and cerulenin, respective inhibitors of protein, RNA, and sterol/fatty acid synthesis. These inhibitors also prevented the induction of the NO3- uptake system in uninduced seedlings. Uninduced seedlings exhibited endogenous NO3- transport activity that appeared to be constitutive. This constitutive activity was also inhibited by NaCl. Recovery of constitutive NO3- uptake did not require the presence of NO3-.

  9. Interaction in the NaIn(MoO4)2 - AMoO4 (A = Mg, Mn) systems

    International Nuclear Information System (INIS)

    Kotova, I.Yu.; Kozhevnikova, N.M.

    2001-01-01

    The results of investigation into NaIn(MoO 4 ) 2 - AMoO 4 (A = Mg, Mn) quasibinary cross-sections by means of X-ray diffraction and differential thermal analysis are presented. Conducted researches revealed that compounds NaMg 3 In(MoO 4 ) and NaMn 3 In(MoO 4 ) melting incongruently at 990 Deg C and 940 Deg C accordingly were formed in the NaIn(MoO 4 ) - AMoO 4 (A = Mg, Mn) systems. The data of initiation of X-ray diffraction pattern of NaMg 3 In(MoO 4 ) 5 are presented. The temperature dependences of conductivity, dielectric permeability and tangent of dielectric losses indicative on ionic-electronic nature conductivity are determined. Activation energy of conductivity in the Mg - Mn row changes moderately - from 9.91 till 5.71 eV [ru

  10. Natural Information Processing Systems

    OpenAIRE

    John Sweller; Susan Sweller

    2006-01-01

    Natural information processing systems such as biological evolution and human cognition organize information used to govern the activities of natural entities. When dealing with biologically secondary information, these systems can be specified by five common principles that we propose underlie natural information processing systems. The principles equate: (1) human long-term memory with a genome; (2) learning from other humans with biological reproduction; (3) problem solving through random ...

  11. Terapia de linguagem na afasia

    Directory of Open Access Journals (Sweden)

    Mauro Spinelli

    1977-12-01

    Full Text Available A terapia da linguagem na afasia foi estudada em 15 pacientes, 8 do sexo masculino e 7 do sexo feminino; a idade variou de menos de 10 anos a mais de 50 anos; em 11 casos a afasia era sequela de acidente vascular cerebral e, em 4, de traumatismo crânio-encefálico. Quanto ao tipo de afasia, 5 pacientes apresentavam déficits predominantemente de expressão e 10 apresentavam déficits receptivos e expressivos em graus equiparáveis. Em 6 casos a terapia foi iniciada dentro dos 3 primeiros meses de instalação do quadro; nos restantes foi iniciada mais tardiamente. Dos 15 pacientes, 11 apresentaram evolução satisfatória, a qual não depndeu do grau de afasia, do tipo de afasia, da idade do paciente, do tipo de patologia e do intervalo entre a instalação do quadro afásico e o início da terapia. A terapia da linguagem no paciente afásico é efetiva, o prognóstico não pode ser feito a priori. Somente a evolução do caso com sua retestagem criteriosa poderá dar dados realmente úteis para se falar em evolução.

  12. Extracellular Na+ levels regulate formation and activity of the NaX/alpha1-Na+/K+-ATPase complex in neuronal cells.

    Directory of Open Access Journals (Sweden)

    Emmanuelle eBerret

    2014-12-01

    Full Text Available MnPO neurons play a critical role in hydromineral homeostasis regulation by acting as sensors of extracellular sodium concentration ([Na+]out. The mechanism underlying Na+-sensing involves Na+-flow through the NaX channel, directly regulated by the Na+/K+-ATPase α1-isoform which controls Na+-influx by modulating channel permeability. Together, these two partners form a complex involved in the regulation of intracellular sodium ([Na+]in. Here we aim to determine whether environmental changes in Na+ could actively modulate the NaX/Na+/K+-ATPase complex activity.We investigated the complex activity using patch-clamp recordings from rat MnPO neurons and Neuro2a cells. When the rats were fed with a high-salt-diet, or the [Na+] in the culture medium was increased, the activity of the complex was up-regulated. In contrast, drop in environmental [Na+] decreased the activity of the complex. Interestingly under hypernatremic condition, the colocalization rate and protein level of both partners were up-regulated. Under hyponatremic condition, only NaX protein expression was increased and the level of NaX/Na+/K+-ATPase remained unaltered. This unbalance between NaX and Na+/K+-ATPase pump proportion would induce a bigger portion of Na+/K+-ATPase-control-free NaX channel. Thus we suggest that hypernatremic environment increases NaX/Na+/K+-ATPase α1-isoform activity by increasing the number of both partners and their colocalization rate, whereas hyponatremic environment down-regulates complex activity via a decrease in the relative number of NaX channels controlled by the pump.

  13. Artesanato na terceira idade: um estudo na cidade de Sinop

    Directory of Open Access Journals (Sweden)

    Rosane Marlene Weber

    2012-06-01

    Full Text Available O presente artigo sobre o artesanato e a Terceira Idade, pesquisa realizada em 2011, teve como metodologia o Estudo de Caso do tipo etnográfico. A metodologia de investigação ocorreu por meio de entrevistas semiestruturadas, orais e transcritas, observação e fotografias dos artesanatos em locais de venda e nas residências dos artesãos. Os sujeitos da pesquisa foram: a presidente da Associação da Casa do Artesão de Sinop-MT e oito artesãos. O objetivo foi mostrar a importância do artesanato como atividade educacional e como produtora de autonomia e autoria para os artesãos da Terceira Idade, motivados em realizar este trabalho nesta fase da vida. Para o embasamento teórico utilizou-se obras de Paulo Freire, Moacir Gadotti e sobre a Terceira Idade a coleção de Vivaidade com a organizadora Anita Liberalesso Neri. A análise das entrevistas mostrou que o artesanato traz autonomia educacional quando o idoso busca sozinho aprender sobre o objeto a ser realizado, assim como autonomia financeira, uma vez que a venda do artesanato proporciona certa independência econômica. Em relação ao sentimento de autoria das peças criadas constatou-se muita satisfação e realização, o que motiva a continuar sendo úteis e produtivos na Terceira Idade com muita criatividade. Palavras-chave: educação; terceira idade; artesanato; autonomia; autoria.

  14. Determination of inorganic ions in natural water by ion chromatography

    International Nuclear Information System (INIS)

    Nazaratul Ashifa Abdullah Salim; Mohd Suhaimi Hamzah; Eewiat Edin Put; Abdul Khalik Wood; Shamsiah Abdul Rahman; Md Suhaimi Elia

    2010-01-01

    Ion chromatography (IC) is a well established methodology for analysis of ionic species. The concentration of ionic species was determined using suppressed IC with conductivity detection. Anion species were determined in a single 15-min run with Na 2 CO 3 and NaHCO 3 eluent. Cation species were analysed by direct injection of 1 ml and isocratic elution with a methanesulfonic acid (MSA) eluent. Natural water were collected from various sources such as rainwater, lake, river and groundwater. Analysis performance of IC system was validated by evaluating the linear regression of calibration curve, recovery of spike sample and quality control sample. (author)

  15. 7th World Congress on Nature and Biologically Inspired Computing

    CERN Document Server

    Engelbrecht, Andries; Abraham, Ajith; Plessis, Mathys; Snášel, Václav; Muda, Azah

    2016-01-01

    World Congress on Nature and Biologically Inspired Computing (NaBIC) is organized to discuss the state-of-the-art as well as to address various issues with respect to Nurturing Intelligent Computing Towards Advancement of Machine Intelligence. This Volume contains the papers presented in the Seventh World Congress (NaBIC’15) held in Pietermaritzburg, South Africa during December 01-03, 2015. The 39 papers presented in this Volume were carefully reviewed and selected. The Volume would be a valuable reference to researchers, students and practitioners in the computational intelligence field.

  16. Sorption of 60 Co in natural zeolite (clinoptilolite)

    International Nuclear Information System (INIS)

    Hernandez B, E.

    1996-01-01

    A Mexican zeolite (clinoptilolite) from Taxco, Guerrero, was partially stabilized with sodium cations. Radioactive Cobalt ( 60 Co) was used to study the Co 2+ sorption in the stabilized zeolite (Na + ). It was found that sorption in general does not favour the diffusion of cobalt between framework, it explains because of it is a natural zeolite and its composition heterogeneous decrease its exchange capacity by the generated competence to the existence other type of exchange ions. The cobalt retention reached the highest level, around 0.408 m eq Co 2+ /g in the Na-Clinoptilolite. The crystallinity of the aluminosilicates was maintained during experiments, it was verified by XRD patterns. (Author)

  17. Glutamate Water Gates in the Ion Binding Pocket of Na(+) Bound Na(+), K(+)-ATPase

    DEFF Research Database (Denmark)

    Han, Minwoo; Kopec, Wojciech; Solov'yov, Ilia A

    2017-01-01

    III is always protonated. Glutamic acid residues in the three binding sites act as water gates, and their deprotonation triggers water entry to the binding sites. From DFT calculations of Na(+) binding energies, we conclude that three protons in the binding site are needed to effectively bind Na......The dynamically changing protonation states of the six acidic amino acid residues in the ion binding pocket of the Na(+), K(+) -ATPase (NKA) during the ion transport cycle are proposed to drive ion binding, release and possibly determine Na(+) or K(+) selectivity. We use molecular dynamics (MD......(+) from water and four are needed to release them in the next step. Protonation of Asp926 in site III will induce Na(+) release, and Glu327, Glu954 and Glu779 are all likely to be protonated in the Na(+) bound occluded conformation. Our data provides key insights into the role of protons in the Na...

  18. Crystal structure of Na+, K(+)-ATPase in the Na(+)-bound state.

    Science.gov (United States)

    Nyblom, Maria; Poulsen, Hanne; Gourdon, Pontus; Reinhard, Linda; Andersson, Magnus; Lindahl, Erik; Fedosova, Natalya; Nissen, Poul

    2013-10-04

    The Na(+), K(+)-adenosine triphosphatase (ATPase) maintains the electrochemical gradients of Na(+) and K(+) across the plasma membrane--a prerequisite for electrical excitability and secondary transport. Hitherto, structural information has been limited to K(+)-bound or ouabain-blocked forms. We present the crystal structure of a Na(+)-bound Na(+), K(+)-ATPase as determined at 4.3 Å resolution. Compared with the K(+)-bound form, large conformational changes are observed in the α subunit whereas the β and γ subunit structures are maintained. The locations of the three Na(+) sites are indicated with the unique site III at the recently suggested IIIb, as further supported by electrophysiological studies on leak currents. Extracellular release of the third Na(+) from IIIb through IIIa, followed by exchange of Na(+) for K(+) at sites I and II, is suggested.

  19. The local structure of CaNa pyroxenes. I. XANES study at the Na K-edge

    International Nuclear Information System (INIS)

    Mottana, Annibale; Murata, T.; Wu, Ziyu; Marcelli, Augusto; Paris, E.

    1996-07-01

    X-ray absorption Na K-edge spectra have been recorded on synthetic end member jadeite and on a series of natural Ca-Na pyroxenes compositionally straddling the Jd-Di. The disordered C2/c members of the series are systematically different from the ordered P2/n members. These differences can be interpreted and explained by comparing the experimental spectra with theoretical spectra. These have been calculated by the multiple-scattering formalism from the atomic positional parameters determined by single-crystal X-ray diffraction structure refinement on the same samples. In the full multiple scattering region of the spectrum (1075 to 1095 eV) C-pyroxenes exhibit three features which reflect the 6-2 configuration of the O back-scattering atoms around the Na absorber located at the center of the cluster (site M2 of the jadeite structure). P-pyroxenes show more complicated spectra in which at least four features can be recognized; they reflect the two types of the configuration (6-2 and 4-2-2) of the oxygens around Na in the two independent M2 and M21 eight-fold coordinated sites of the omphacite structure. A weak, sometimes poorly resolved peak at 1079 eV diagnostic and discriminates C- from P-pyroxenes. The Garnet Ridge C2/c impure jadeite exhibits a spectrum which is intermediate between those of jadeite and omphacite. The Hedin-Lundqist potential proves best for these insulating materials and allows multiple-scattering calculations agreeing well with experiments. The assessment of the local electronic properties of compositionally and structurally complex minerals such as clinopyroxenes is thus enhanced

  20. The local structure of Ca{sub N}a pyroxenes. I. XANES study at the Na K-edge

    Energy Technology Data Exchange (ETDEWEB)

    Mottana, Annibale [Rome, Univ. III (Italy). Dipt. di Scienze Geologiche; Murata, T. [Kyoto, Univ. of Education (Japan). Dept. of Physics; Wu, Ziyu; Marcelli, Augusto [INFN, Frascati (Italy). Laboratori Nazionali di Frascati; Paris, E. [Camerino, Univ. (Italy). Dipt. di Scienze della Terra

    1996-07-01

    X-ray absorption Na K-edge spectra have been recorded on synthetic end member jadeite and on a series of natural Ca-Na pyroxenes compositionally straddling the Jd-Di. The disordered C2/c members of the series are systematically different from the ordered P2/n members. These differences can be interpreted and explained by comparing the experimental spectra with theoretical spectra. These have been calculated by the multiple-scattering formalism from the atomic positional parameters determined by single-crystal X-ray diffraction structure refinement on the same samples. In the full multiple scattering region of the spectrum (1075 to 1095 eV) C-pyroxenes exhibit three features which reflect the 6-2 configuration of the O back-scattering atoms around the Na absorber located at the center of the cluster (site M2 of the jadeite structure). P-pyroxenes show more complicated spectra in which at least four features can be recognized; they reflect the two types of the configuration (6-2 and 4-2-2) of the oxygens around Na in the two independent M2 and M21 eight-fold coordinated sites of the omphacite structure. A weak, sometimes poorly resolved peak at 1079 eV diagnostic and discriminates C- from P-pyroxenes. The Garnet Ridge C2/c impure jadeite exhibits a spectrum which is intermediate between those of jadeite and omphacite. The Hedin-Lundqist potential proves best for these insulating materials and allows multiple-scattering calculations agreeing well with experiments. The assessment of the local electronic properties of compositionally and structurally complex minerals such as clinopyroxenes is thus enhanced.

  1. Natural gas annual 1997

    International Nuclear Information System (INIS)

    1998-10-01

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1997 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1993 to 1997 for each Census Division and each State. Annual historical data are shown at the national level. 27 figs., 109 tabs

  2. Natural Ventilation in Atria

    DEFF Research Database (Denmark)

    Svidt, Kjeld; Heiselberg, Per; Hendriksen, Ole Juhl

    This case study comprises a monitoring programme as well as a Computational Fluid Dynamics (CFD) analysis of a natural ventilated atrium. The purpose has been to analyse the performance of a typical natural ventilation system in Denmark under both summer and winter conditions.......This case study comprises a monitoring programme as well as a Computational Fluid Dynamics (CFD) analysis of a natural ventilated atrium. The purpose has been to analyse the performance of a typical natural ventilation system in Denmark under both summer and winter conditions....

  3. Nature-based integration

    DEFF Research Database (Denmark)

    Pitkänen, Kati; Oratuomi, Joose; Hellgren, Daniela

    Increased attention to, and careful planning of the integration of migrants into Nordic societies is ever more important. Nature based integration is a new solution to respond to this need. This report presents the results of a Nordic survey and workshop and illustrates current practices of nature...... based integration by case study descriptions from Denmark, Sweden Norway and Finland. Across Nordic countries several practical projects and initiatives have been launched to promote the benefits of nature in integration and there is also growing academic interest in the topic. Nordic countries have...... the potential of becoming real forerunners in nature based integration even at the global scale....

  4. Natural gas annual 1997

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-10-01

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1997 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1993 to 1997 for each Census Division and each State. Annual historical data are shown at the national level. 27 figs., 109 tabs.

  5. Natural gas outlook

    International Nuclear Information System (INIS)

    Molyneaux, M.P.

    1998-01-01

    An overview of natural gas markets in Canada and in the United States was provided. The major factors that determine the direction of natural gas prices were depicted graphically. Price volatility has decreased in recent months. As expected, April through November total energy consumption reached historically high levels. Demand for natural gas during the summer of 1997 was not as strong as anticipated. Nuclear energy appears to be on the slippery slope, with natural gas-driven electricity projects to fill the void. Hydroelectricity had a strong showing in 1997. Prospects are less bright for 1998 due to above average temperatures. Canadian natural gas export capacity has increased 5.5 times between 1986 and estimated 1999 levels. Despite this, in 1997, deliveries to the United States were marginally behind expectations. Natural gas consumption, comparative fuel prices, natural gas drilling activity, natural gas storage capacity, actual storage by region, and average weekly spot natural gas prices, for both the U. S. and Canada, were also provided. With regard to Canada, it was suggested that Canadian producers are well positioned for a significant increase in their price realization mostly because of the increase in Canada's export capacity in 1997 (+175 Mmcf/d), 1998 (1,060 Mmcf/d) and potentially in 1999 or 2000, via the Alliance Pipeline project. Nevertheless, with current production projections it appears next to impossible to fill the 10.9 Bcf/d of export capacity that will be potentially in place by the end of 1999. tabs., figs

  6. Nephrotoxicity of Natural Products.

    Science.gov (United States)

    Nauffal, Mary; Gabardi, Steven

    2016-01-01

    The manufacture and sale of natural products constitute a multi-billion dollar industry. Nearly a third of the American population admit to using some form of complementary or alternative medicine, with many using them in addition to prescription medications. Most patients fail to inform their healthcare providers of their natural product use and physicians rarely inquire. Annually, thousands of natural product-induced adverse events are reported to Poison Control Centers nationwide. Natural product manufacturers are not responsible for proving safety and efficacy, as the FDA does not regulate them. However, concerns exist surrounding the safety of natural products. This review provides details on natural products that have been associated with renal dysfunction. We have focused on products that have been associated with direct renal injury, immune-mediated nephrotoxicity, nephrolithiasis, rhabdomyolysis with acute renal injury, hepatorenal syndrome, and common adulterants or contaminants that are associated with renal dysfunction. The potential for natural products to cause renal dysfunction is justifiable. It is imperative that natural product use be monitored closely in all patients. Healthcare practitioners must play an active role in identifying patients using natural products and provide appropriate patient education. © 2016 S. Karger AG, Basel.

  7. Nature as Dissonant Heritage

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2014-01-01

    accepts that nature it not existing outside culture as something that be restored to its original state, but a contemporary product created and managed with certain objectives in mind, nature restoration like heritage production are prone to same kind of dissonance – our nature is not necessary...... their nature. According to Ashworth cultural dissonance can be managed in a number of different way depending on which type of plural society is preferred. Many of these management strategies consciously or unconsciously involve some form of denial, neglect, destruction, reinterpretation or marginalizing...

  8. Oklo natural reactor

    International Nuclear Information System (INIS)

    Fujii, Isao

    1985-01-01

    In 1954, Professor Kazuo, Kuroda of Arkansas University in USA published the possibility that spontaneously generated natural nuclear reactors existed in prehistoric age. In 1972, 18 years after that, Commissariat a l'Energie Atomique published that in the Oklo uranium deposit in Gabon, Africa, a natural nuclear reactor was found. This fact was immediately informed to the whole world, but in Japan, its details have not necessarily been well known. The chance of investigating into this fact and visiting the Oklo deposit by the favor of COMUF, the owner of the Oklo deposit, was given, therefore, the state of the natural reactors, which has been known so far, is reported. At present, 12 natural reactors have been found in the vicinity of the Oklo deposit. The natural reactors were generated spontaneously in uranium deposits about 1.7 billion years ago when the isotopic abundance of U-235 was 3 %, and the chain reaction started naturally. When the concentration of U-235 lowered, the reaction stopped naturally. The abnormality in the U-235 abundance in natural uranium was found, and the cause was pursued. The evidence of the existence of natural reactors was shown. (Kako, I.)

  9. A mathematical nature walk

    CERN Document Server

    Adam, John A

    2009-01-01

    How heavy is that cloud? Why can you see farther in rain than in fog? Why are the droplets on that spider web spaced apart so evenly? If you have ever asked questions like these while outdoors, and wondered how you might figure out the answers, this is a book for you. An entertaining and informative collection of fascinating puzzles from the natural world around us, A Mathematical Nature Walk will delight anyone who loves nature or math or both. John Adam presents ninety-six questions about many common natural phenomena--and a few uncommon ones--and then shows how to answer them using mostly b

  10. Synthesis of NaCl Single Crystals with Defined Morphologies as Templates for Fabricating Hollow Nano/micro-structures

    DEFF Research Database (Denmark)

    Wang, B.B.; Jin, P.; Yue, Yuanzheng

    2015-01-01

    . These naturally abundant NaCl single crystal templates are water-soluble, environmentally-friendly and uniform in both geometry and size, and hence are ideal for preparing high quality hollow nano/micro structures. The new approach may have the potential to replace the conventional hard or soft template...... approaches. Furthermore, this work has revealed the formation mechanism of nano/micron NaCl crystals with different sizes and geometries....

  11. Prehistory effect on dielectric properties of NaNbO3-Gd1/3NbO3

    International Nuclear Information System (INIS)

    Burkhanov, A.I.; Bondarenko, P.V.; Shil'nikov, A.V.; Raevskaya, S.I.; Raevskij, I.P.

    2006-01-01

    One studied the low- and the infralow-frequency dielectric response of 0.9NaNbO 3 -0.1Gd 1/3 NbO 3 (NNG10) composition ceramics and single crystal at the material different prehistory. One revealed the differences in the nature of dielectric aging in NaNbO 3 antiferroelectric base material with a diffused phase transition in contrast to manifestation of similar phenomena in ferroelectrics-relaxors [ru

  12. Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber

    Directory of Open Access Journals (Sweden)

    Suhawati Ibrahim

    2014-12-01

    Full Text Available Natural rubber (NR is a high molecular weight natural polymer and can be degraded to liquid natural rubber (LNR leaving certain functional groups at the end of chains. In this study, LNR samples prepared via oxidative degradation using H2O2 and NaNO2 as reagents were found to have different end groups depending on the pH of the reaction medium. In an acidic medium, LNR with hydroxyl terminal groups was formed as the degradation reaction was initiated by hydroxyl radicals produced from decomposition of peroxynitrite acid. In contrast, a redox reaction took place in an alkaline medium to yield LNR with carbonyl terminal groups. The mechanisms of reaction are discussed and proposed to explain the formation of different end groups when reaction carried out in acidic and alkaline media. Chain degradation in an acidic medium seems to be more effective than in an alkaline medium, and thus yields LNR with lower Mn.

  13. The Radioisotopic Determination of Diffusion Coefficients and Currents in Natural Waters. Surface Collection of Radioactive Fall-Out on a Large Alpine Lake; Determination par detection nucleaire des coefficients de diffusion et des courants dans les eaux naturelles. Evolution de la surface de collection d'un grand lac alpin pour les retombees radioactives; Opredelenie koehffitsienta diffuzii i skorosti techeniya estestvennykh vod pri pomoshchi yadernogo detektirovaniya. Ehvolyutsiya poverkhnosti sbora radioaktivnykh osadkov na bol'shom al'pijskom ozere; Determinacion por deteccion nuclear de los coeficientes de difusion y de las corrientes en las aguas naturales evolucion de la superficie de captacion de un gran lago alpino para las precipitaciones radiactivas

    Energy Technology Data Exchange (ETDEWEB)

    Chesselet, R.; Nordemann, D. [Service d' Electronique Physique, Centre d' Etudes Nucleaires de Saclay (France); Dussart, B. [Centre de Recherches Hydrobiologiques, CNRS, Gif-sur-Yvette (France)

    1963-08-15

    In an initial stage, the authors brought about the in situ diffusion of a radioactive emitter (sodium-22, in the form of Na{sup +}) with very low activity, i.e. less than 1 mc. The diffusion laws applied in this case made it easy to predict the rate of diffusing of the {sup r}adioactive cloud{sup .} In this way, plotting the activities, as measured by two suitably placed gamma detectors, against time permits the estimation of a diffusion coefficient for the emitter used and, if appropriate, the measurement of current velocity at the point of measurement (in the case described, the Lake of Geneva). Subsequently, and in conjunction with a geophysical study on the general problem of radioactive fall-out, the authors worked on the increases in radioactive fall-out caused by nuclear tests in the atmosphere (October 1961 - January 1962). Measurements of radioactivity were made every day on samples of Lake Geneva water taken at depths of 0 m, 10 m and 20 m and also on a collector of dry and moist atmospheric fall-out. Despite the complex pattern, over a period, of theincreasesinfall-out , the interpretation of the diagrams obtained can help to explain what happens to radioactive products in the diffusion and current conditions encountered. The use of the diffusion of radioactive products in very small quantities and of the various highly sensitive techniques of nuclear detection now available can lead to a better understanding of in situ diffusion and of the movement of natural water masses. (author) [French] Dans un premiere etape, les auteurs ont provoque la diffusion in situ d'un emetteur radioactif, le sodium 22, sous forme de Na{sup +}, avec des activites tres faibles, inferieures au millicurie. Les lois de la diffusion appliquee a ce cas permettent aisement de prevoir l'allure du 'n'uage radioactif'' en cours de diffusion. Ainsi, l'enregistrement en fonction du temps des activites mesurees par deux detecteurs gamma convenablemen t disposes conduit a l'evaluation d

  14. Laser-induced ionization of Na vapor

    International Nuclear Information System (INIS)

    Wu, R.C.Y.; Judge, D.L.; Roussel, F.; Carre, B.; Breger, P.; Spiess, G.

    1982-01-01

    The production of Na 2 + ions by off-resonant laser excitation in the 5800-6200A region mainly results from two-photon absorption by the Na 2 molecule to highly excited gerade states followed by (a) direct ionization by absorbing a third photon or (b) coupling to the molecular Na 2 D 1 PIμ Rydberg state which is subsequently ionized by absorbing a third photon. This mechanism, i.e., a two-photon resonance three photon ionization process, explains a recent experimental observation of Roussel et al. It is suggested that the very same mechanism is also responsible for a similar observation reported by Polak-Dingels et al in their work using two crossed Na beams. In the latter two studies the laser-induced associative ionization processes were reported to be responsible for producing the Na 2 + ion. From the ratio of molecular to atomic concentration in the crossed beam experiment of Polak-Dingels et al we estimate that the cross section for producing Na 2 + through laser-induced associative ionization is at least four orders of magnitude smaller than ionization through the two-photon resonance three photon ionization process in Na 2 molecules

  15. NaK handling and removal

    International Nuclear Information System (INIS)

    Desreumaux, J.; Rodriguez, G.; Guigon, A.; Verdelli, J.; Thomine, G.

    1997-01-01

    Sodium-potassium alloy is used in specific application in French Fast Breeder Reactors as: cold traps, NaK bubbler for argon purification, valves and also in experimental irradiation devices. lt has been preferred to sodium because it is liquid from + 7 deg. C for the most common peritectic alloy. After its use, NaK is considered as a hazardous waste (nuclear or not) due to its high reactivity with air and water. The most important risk remains in handling NaK systems which have not been operated for some time. The NaK will be covered with a crust of the superoxide K02 which is a strong oxidising agent. Thermodynamically, K02 will react with most organic material or metallic dust or swarfs and can also react with additional NaK to give sufficient heat to boil part of the NaK, resulting in a sudden increase in pressure and small explosions. We describe the formation given to experimenters in our Sodium School and the CEA's experience in treating specific devices for transportation, decanting of tanks, tank opening and NaK removal. (author)

  16. NaAuS chicken-wire-like semiconductor: Electronic structure and optical properties

    International Nuclear Information System (INIS)

    Reshak, A.H.; Khan, Saleem Ayaz; Kamarudin, H.; Bila, Jiri

    2014-01-01

    Highlights: • Chicken wire like semiconductor NaAuS was investigated. • Good agreement with experimental data was found. • Electronic charge density of chicken wire like semiconductor NaAuS was obtained. • The calculated uniaxial anisotropy is −0.0005, indicating the strong anisotropy. -- Abstract: The electronic structure, charge density and optical properties of NaAuS a chicken-wire-like semiconductor was calculated using full potential linear augmented plane wave based on density functional theory. The Ceperley-Alder local density approximation, Perdew Becke Ernzerhof Generalized gradient approximation and Engel Voskov Generalized Gradient Approximation were applied to solve the exchange correlation potential. The investigation of band structures and density of states elucidates that Engle Vasko Generalized Gradient Approximation shows close agreement to the experimental data. The calculated valence charge density shows pure ionic nature of Au–Au bond. It becomes partially covalent when Au is connected with two Na atoms. The linear optical susceptibilities of chicken-wire-like NaAuS semiconductor are calculated so as to obtain further insight into the electronic properties. The uniaxial anisotropy is −0.0005, indicating the strong anisotropy of the dielectric function in the NaAuS a chicken-wire-like semiconductor

  17. NaAuS chicken-wire-like semiconductor: Electronic structure and optical properties

    Energy Technology Data Exchange (ETDEWEB)

    Reshak, A.H. [Institute of Complex Systems, FFPW, CENAKVA, University of South Bohemia in CB, Nove Hrady 37333 (Czech Republic); Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, 01007 Kangar, Perlis (Malaysia); Khan, Saleem Ayaz, E-mail: sayaz_usb@yahoo.com [Institute of Complex Systems, FFPW, CENAKVA, University of South Bohemia in CB, Nove Hrady 37333 (Czech Republic); Kamarudin, H. [Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, 01007 Kangar, Perlis (Malaysia); Bila, Jiri [Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, CTU in Prague, Technicka 4, 166 07 Prague 6 (Czech Republic)

    2014-01-05

    Highlights: • Chicken wire like semiconductor NaAuS was investigated. • Good agreement with experimental data was found. • Electronic charge density of chicken wire like semiconductor NaAuS was obtained. • The calculated uniaxial anisotropy is −0.0005, indicating the strong anisotropy. -- Abstract: The electronic structure, charge density and optical properties of NaAuS a chicken-wire-like semiconductor was calculated using full potential linear augmented plane wave based on density functional theory. The Ceperley-Alder local density approximation, Perdew Becke Ernzerhof Generalized gradient approximation and Engel Voskov Generalized Gradient Approximation were applied to solve the exchange correlation potential. The investigation of band structures and density of states elucidates that Engle Vasko Generalized Gradient Approximation shows close agreement to the experimental data. The calculated valence charge density shows pure ionic nature of Au–Au bond. It becomes partially covalent when Au is connected with two Na atoms. The linear optical susceptibilities of chicken-wire-like NaAuS semiconductor are calculated so as to obtain further insight into the electronic properties. The uniaxial anisotropy is −0.0005, indicating the strong anisotropy of the dielectric function in the NaAuS a chicken-wire-like semiconductor.

  18. Recent advances in enhanced luminescence upconversion of lanthanide-doped NaYF4 phosphors

    Science.gov (United States)

    Kumar, Deepak; Verma, Kartikey; Verma, Shefali; Chaudhary, Babulal; Som, Sudipta; Sharma, Vishal; Kumar, Vijay; Swart, Hendrik C.

    2018-04-01

    NaYF4 is regarded as the best upconversion (UC) matrix owing to its low phonon energy, more chemical stability, and a superior refractive index. This review reports on the various synthesis techniques of lanthanide-doped NaYF4 phosphors for UC application. The UC intensity depends on different properties of the matrix and those are discussed in detail. Plasmon-enhanced luminescence UC of the lanthanide-doped NaYF4 core-shells structure is discussed based on a literature survey. The present review provides the information about how the UC intensity can be enhanced. The idea about the UC is then deliberately used for versatile applications such as luminescent materials, display devices, biomedical imaging and different security appliances. In addition, the present review demonstrates the recent trends of NaYF4 UC materials in solar cell devices. The role of NaYF4 phosphor to eradicate the spectral variance among the incident solar spectrum, semiconductor as well as the sub-band gap nature of the semiconductor materials is also discussed in detail. Considering the fact that the research status on NaYF4 phosphor for photovoltaic application is now growing, the present review is therefore very important to the researchers. More importantly, this may promote more interesting research platforms to investigate the realistic use of UC nanophosphors as spectral converters for solar cells.

  19. Na/K pump inactivation, subsarcolemmal Na measurements, and cytoplasmic ion turnover kinetics contradict restricted Na spaces in murine cardiac myocytes

    OpenAIRE

    Lu, Fang-Min; Hilgemann, Donald W.

    2017-01-01

    The Na/K pump exports cytoplasmic Na ions while importing K ions, and its activity is thought to be affected by restricted intracellular Na diffusion in cardiac myocytes. Lu and Hilgemann find instead that the pump can enter an inactivated state and that inactivation can be relieved by cytoplasmic Na.

  20. CERN result provides answer to one of nature's most subtle secrets

    CERN Multimedia

    CERN Press Office. Geneva

    1999-01-01

    At a seminar at CERN on 18 June Pascal Debu, spokesman of the Laboratory's NA48 experiment, announced its preliminary result, after analysis of 10% of the expected data, on one of nature's best-kept secrets. Direct CP-violation, as it is called, is a subtle effect that betrays nature's preference for matter over antimatter, the reason why we are here.

  1. Nature as Measure

    DEFF Research Database (Denmark)

    Peters, Terri

    2011-01-01

    The potential for biomimicry lies far beyond the direct imitation of natural forms. Guest-editor Terri Peters describes how Janine Benyus, the biologist and innovation consultant, is using biomimicry to create performance metrics from natural technologies and processes for assessing aspects...

  2. Modeling Natural Selection

    Science.gov (United States)

    Bogiages, Christopher A.; Lotter, Christine

    2011-01-01

    In their research, scientists generate, test, and modify scientific models. These models can be shared with others and demonstrate a scientist's understanding of how the natural world works. Similarly, students can generate and modify models to gain a better understanding of the content, process, and nature of science (Kenyon, Schwarz, and Hug…

  3. Greenland and Natural Resources

    DEFF Research Database (Denmark)

    Lyck, Lise

    Greenland policy can delay and maybe change the future of the forecasted development of the use of natural resources. This book is relevant for anyone interested in Greenland in general and the development of Greenland both politically and economically and in relation natural resources....

  4. Natural - synthetic - artificial!

    DEFF Research Database (Denmark)

    Nielsen, Peter E

    2010-01-01

    The terms "natural," "synthetic" and "artificial" are discussed in relation to synthetic and artificial chromosomes and genomes, synthetic and artificial cells and artificial life.......The terms "natural," "synthetic" and "artificial" are discussed in relation to synthetic and artificial chromosomes and genomes, synthetic and artificial cells and artificial life....

  5. European natural gas

    International Nuclear Information System (INIS)

    Thackeray, Fred

    1999-11-01

    Contains Executive Summary and Chapters on: Main issues; Natural gas consumption and supply: statistics and key features of individual countries; Sectoral natural gas consumption; Indigenous production; Imports; Prices and taxes; The spot market: The interconnector; Forecasts of production and consumption and contracted imports; Progress of markets liberalisation; Effects of environmentalist developments; Transmission networks and storage; Some principal players. (Author)

  6. Nature Foil Reliefs

    Science.gov (United States)

    Lane, Shaw J.

    2012-01-01

    Nature has always been a source of inspiration for artists across the centuries. Artists such as Leonardo da Vinci, Georgia O'Keeffe, Ansel Adams, and Andy Goldsworthy all drew inspiration for their work from nature. Seeds come from the dried pods, which when planted and cared for, bear fruit. In this article, the author describes how her…

  7. Plutonium in nature

    International Nuclear Information System (INIS)

    Madic, C.

    1994-01-01

    Plutonium in nature comes from natural sources and anthropogenic ones. Plutonium at the earth surface comes principally from anthropogenic sources. It is easily detectable in environment. The plutonium behaviour in environment is complex. It seems necessary for the future to reduce releases in environment, to improve predictive models of plutonium behaviour in geosphere, to precise biological impact of anthropogenic plutonium releases

  8. Exposure to natural radiation

    International Nuclear Information System (INIS)

    Green, B.M.R.

    1985-01-01

    A brief report is given of a seminar on the exposure to enhanced natural radiation and its regulatory implications held in 1985 at Maastricht, the Netherlands. The themes of the working sessions included sources of enhanced natural radiation, parameters influencing human exposure, measurement and survey programmes, technical countermeasures, risk and assessment studies, philosophies of dose limitations and national and international policies. (U.K.)

  9. Nature and landscape protection

    International Nuclear Information System (INIS)

    Klinda, J.; Lieskovska, Z.

    1998-01-01

    In accordance with National Council of the Slovak Republic Act N. 287/1994 Coll. on Nature and Landscape Protection, the system of complex nature landscape protection has been designed based on five levels of protection. Categories of protected areas as well as cultural monuments in the Slovak Republic are reviewed.Slovak contribution to the world heritage is included

  10. MODELI MERJENJA KAKOVOSTI STORITEV NA MEDORGANIZACIJSKEM TRGU

    OpenAIRE

    Cestnik, Dušan

    2011-01-01

    Vse večja konkurenca na medorganizacijskih trgih sili tako storitvena podjetja, kot tudi podjetja, ki tržijo izdelke, da svoje delo opravljajo vse bolj kakovostno na vseh ravneh svojega delovanja. Podjetja morajo svoje odjemalce obdržati, prav tako pa morajo delovati tudi na pridobivanju novih odjemalcev. Da pa podjetja svoje odjemalce obdržijo morajo nenehno delovati tako, da uživajo zaupanje svojih odjemalcev. Odjemalec že z odločitvijo za neko določeno podjetje XY pričakuje, da bodo storit...

  11. Myocardial Na,K-ATPase: Clinical aspects

    Science.gov (United States)

    Kjeldsen, Keld

    2003-01-01

    The specific binding of digitalis glycosides to Na,K-ATPase is used as a tool for Na,K-ATPase quantification with high accuracy and precision. In myocardial biopsies from patients with heart failure, total Na,K-ATPase concentration is decreased by around 40%; a correlation exists between a decrease in heart function and a decrease in Na,K-ATPase concentration. During digitalization, around 30% of remaining pumps are occupied by digoxin. Myocardial Na,K-ATPase is also influenced by other drugs used for the treatment of heart failure. Thus, potassium loss during diuretic therapy has been found to reduce myocardial Na,K-ATPase, whereas angiotensin-converting enzyme inhibitors may stimulate Na,K pump activity. Furthermore, hyperaldosteronism induced by heart failure has been found to decrease Na,K-ATPase activity. Accordingly, treatment with the aldosterone antagonist, spironolactone, may also influence Na,K-ATPase activity. The importance of Na,K pump modulation with heart disease, inhibition in digitalization and other effects of medication should be considered in the context of sodium, potassium and calcium regulation. It is recommended that digoxin be administered to heart failure patients who, after institution of mortality-reducing therapy, still have heart failure symptoms, and that the therapy be continued if symptoms are revealed or reduced. Digitalis glycosides are the only safe inotropic drugs for oral use that improve hemodynamics in heart failure. An important aspect of myocardial Na,K pump affection in heart disease is its influence on extracellular potassium (Ke) homeostasis. Two important aspects should be considered: potassium handling among myocytes, and effects of potassium entering the extracellular space of the heart via the bloodstream. It should be noted that both of these aspects of Ke homeostasis are affected by regulatory aspects, eg, regulation of the Na,K pump by physiological and pathophysiological conditions, as well as by medical

  12. Nalaz tombusvirusa na vrsti Erigeron canadensis L.

    OpenAIRE

    Jeknić, Zoran; Erić, Živojin; Grbelja, Julijana

    1988-01-01

    Iz listova zaraženih primjeraka korovne biljke Erigeron canadensis L. koji su rasli na nekoliko lokaliteta u Sarajevu izoliran je virus iz skupine tombusvirusi. Identifikacija virusa izvršena je na osnovi reakcije pokusnih biljaka, analize ultratankih presjeka kroz zaraženo tkivo, morfologije i veličine virusnih čestica, te na osnovi seroloških reakcija metodom dvostruke imunodifuzije u agarskom gelu i čvrsto fazne imunoelektronske mikroskopije (SPIEM). U serološkim pokusima upotrijebljen je ...

  13. Korporacje ponadnarodowe na globalnej szachownicy

    Directory of Open Access Journals (Sweden)

    Gracjan Cimek

    2012-07-01

    Full Text Available Supranational corporation on the global chessboard Contemporary globalization reveals the crucial influence of the economy on international relations and domestic politics of states. The proof is carried on the struggle for markets, financial resources and transfer of technology, standards of international law, the conditions for investment and natural resources. Developed paradigm of geoeconomy emphasizes the essential role of the economy in geopolitics. In this framework, an important issue becomes the subject of the transnational corporations, both because of their association with the formation of powers, but also the tendency to submit the state to their purposes and needs.

  14. Growing natural gas usage

    International Nuclear Information System (INIS)

    Saarni, T.

    1996-01-01

    Finnish natural gas usage topped the 3.3 billion cubic metre mark last year, up 3.6 % on the 1994 figure. Growth has increased now for 12 years in a row. Thanks to offtake by large individual users, the pipeline network has been expanded from South-East Finland to the Greater Helsinki area and central southern Finland. Natural gas plays a much larger role in this region than the 10 % accounted for by natural gas nationally would indicate. The growth in the share of Finland's energy use accounted for by natural gas has served to broaden the country's energy supply base. Natural gas has replaced coal and oil, which has considerably reduced the level of emissions resulting form energy generation

  15. Unnaturalised racial naturalism.

    Science.gov (United States)

    Hochman, Adam

    2014-06-01

    Quayshawn Spencer (2014) misunderstands my treatment of racial naturalism. I argued that racial naturalism must entail a strong claim, such as "races are subspecies", if it is to be a substantive position that contrasts with anti-realism about biological race. My recognition that not all race naturalists make such a strong claim is evident throughout the article Spencer reviews (Hochman, 2013a). Spencer seems to agree with me that there are no human subspecies, and he endorses a weaker form of racial naturalism. However, he supports his preferred version of 'racial naturalism' with arguments that are not well described as 'naturalistic'. I argue that Spencer offers us an unnaturalised racial naturalism. Copyright © 2014 Elsevier Ltd. All rights reserved.

  16. Glutathionylation-Dependence of Na+-K+-Pump Currents Can Mimic Reduced Subsarcolemmal Na+ Diffusion

    Science.gov (United States)

    Garcia, Alvaro; Liu, Chia-Chi; Cornelius, Flemming; Clarke, Ronald J.; Rasmussen, Helge H.

    2016-01-01

    The existence of a subsarcolemmal space with restricted diffusion for Na+ in cardiac myocytes has been inferred from a transient peak electrogenic Na+-K+ pump current beyond steady state on reexposure of myocytes to K+ after a period of exposure to K+-free extracellular solution. The transient peak current is attributed to enhanced electrogenic pumping of Na+ that accumulated in the diffusion-restricted space during pump inhibition in K+-free extracellular solution. However, there are no known physical barriers that account for such restricted Na+ diffusion, and we examined if changes of activity of the Na+-K+ pump itself cause the transient peak current. Reexposure to K+ reproduced a transient current beyond steady state in voltage-clamped ventricular myocytes as reported by others. Persistence of it when the Na+ concentration in patch pipette solutions perfusing the intracellular compartment was high and elimination of it with K+-free pipette solution could not be reconciled with restricted subsarcolemmal Na+ diffusion. The pattern of the transient current early after pump activation was dependent on transmembrane Na+- and K+ concentration gradients suggesting the currents were related to the conformational poise imposed on the pump. We examined if the currents might be accounted for by changes in glutathionylation of the β1 Na+-K+ pump subunit, a reversible oxidative modification that inhibits the pump. Susceptibility of the β1 subunit to glutathionylation depends on the conformational poise of the Na+-K+ pump, and glutathionylation with the pump stabilized in conformations equivalent to those expected to be imposed on voltage-clamped myocytes supported this hypothesis. So did elimination of the transient K+-induced peak Na+-K+ pump current when we included glutaredoxin 1 in patch pipette solutions to reverse glutathionylation. We conclude that transient K+-induced peak Na+-K+ pump current reflects the effect of conformation-dependent β1 pump subunit

  17. AVALIAÇÃO DA CAFEÍNA EM ASSOCIAÇÕES MEDICAMENTOSAS

    OpenAIRE

    Débora Mendes LOPES, João Lúcio CARDOSO, Ronilson Ferreira FREITAS, Vanessa de Andrade ROYO

    2013-01-01

    A cafeína é uma metilxantina de origem natural consumida mundialmente em alimentos e em associações medicamentosas, porém seus efeitos bem como o seu mecanismo de ação não são bem definidos de acordo com a literatura. O objetivo deste trabalho foi avaliar os benefícios e riscos ligados à associação da cafeína em medicamentos, bem como fazer comparação das doses citadas pela literatura com as encontradas nos medicamentos mais comercializados e nos alimentos mais consumidos no cotidiano da popu...

  18. O cheiro das palavras: o olfato na narrativa literária

    OpenAIRE

    Gomes, Cristina

    2009-01-01

    Este trabalho, de natureza teórica e criativa, pretende realizar uma investigação para uma teoria do olfato na literatura. Para isso, deve analisar em que situação encontra-se a narrativa contemporânea quando lida com o olfato. Que papel desempenha o sentido do olfato na literatura? Quais são os métodos de escrita sobre o olfato? Como pode o cheiro ser capturado no papel? O trabalho consiste de um capítulo teórico seguido da novela literária A Rua das Laranjeiras. Ce travail, de nature thé...

  19. Development of Na/sup 123/I pharmaceutical from antimony target

    Energy Technology Data Exchange (ETDEWEB)

    Yongjian, L.; Qixun, S.; Dequn, S. (Shanghai Inst. of Nuclear Research, Academia Sinica, Shanghai (China))

    A new method for the production of Na/sup 123/I is described. It is produced by the /sup 121/Sb(..cap alpha..,2n)/sup 123/I nuclear reaction and using a natural antimony target prepared by electroplating in a bath of antimony oxide and hydrofluoric acid. The target is irradiated with 32MeV ..cap alpha..-beams then transferred to a dry distillation apparatus and the iodide evolved and absorbed in NaOH. Quality control is by paper chromatography.

  20. Adsorption of Free Fatty Acid (FFA) in Low-Grade Cooking Oil Used Activated Natural Zeolite as Adsorbent

    Science.gov (United States)

    Larasati Tres Ayu Putranti, Monika; Kompiang Wirawan, Sang; Made Bendiyasa, I.

    2018-01-01

    Adsorption of free fatty acid (FFA) in low-grade cooking oil using active natural zeolite adsorbent was done as an effort to improve the quality of low-grade cooking oil so that it can fulfill the standard of fried oil which has been set on SNI 01-3741-2013. Adsorption was carried out with natural zeolite which activated with HCl and NaOH solution followed by the calcination process. The results showed that the NaOH activated zeolite decreased FFA content in low-grade cooking oil more than the HCl activated natural zeolite, with optimum NaOH concentration was 0.75 M. In the adsorption equilibrium analysis with temperature variation (25 °C, 40 °C, 80 °C ), obtained that adsorption of FFA with NaOH activated natural zeolite follows Adsorption Isotherm Freundlich Model with equilibrium constant value was 20,5873; 0,9629 dan 0,8053.