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Sample records for criados ao ar

  1. ASPECTOS EPIDEMIOLÓGICOS DE UM FOCO DE TUNGÍASE (Tunga penetrans, SIPHONAPTERA EM UM SISTEMA INTENSIVO DE SUÍNOS CRIADOS AO AR LIVRE EPIDEMIOLOGICAL ASPECTS OF A FOCUS OF Tunga penetrans INFESTATION IN OUTDOOR PIG PRODUCTION

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    Osmar Antônio Dalla Costa

    2007-09-01

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    O sistema intensivo de produção de suínos criados ao ar livre (SISCAL é caracterizado por manter os suínos em piquetes com cobertura vegetal, nas fases de reprodução, maternidade e creche, cercados com tela e/ou fios de arame eletrificado. Este trabalho teve por objetivo relatar aspectos epidemiológicos de um foco de tungíase ocorrido em um SISCAL. Foram examinados clinicamente 72 animais, sendo 6 cachaços, 9 fêmeas lactantes, 13 em gestação e 6 em cobrição, 20 leitões lactantes e 34 leitões desmamados e transferidos para unidades de terminação. Verificou-se que nenhum dos cachaços estava infestado (granja 1= 48 e que em 50% do total de fêmeas examinadas ocorreram lesões com maior freqüência nos tetos, o que nas porcas lactantes deu origem à agalaxia por obstrução do canal galactóforo ocasionando involução da glândula mamária. Em 90% dos leitões lactantes constatou-se dificuldade de locomoção causada pela presença do parasito na região plantar do casco e 25% apresentavam, além disto, lesões no jarrete. Dos leitões desmamados transferidos para unidades de terminação em confinamento, com 40-47 dias (granja 2, n=24 e com 70 dias (granja 3, n= 10 de idade 100% e 80%, respectivamente. ainda apresentavam lesões semelhantes às observadas em leitões lactantes. Conclui-se que a tungíase pode afetar suínos criados ao ar livre podendo causar agalaxia em porcas lactantes e dificuldade de locomoção em leitões lactantes e desmamados.

    PALAVRAS-CHAVE: Tunga penetrans; bicho-de-pé; tungíase; sistema intensivo de suínos criados ao ar livre; agalaxia.

    The outdoors intensive-type pig production is characterized by maintaining swine during

  2. Avaliação de Coberturas de Cabanas de Maternidade em Sistema Intensivo de Suínos Criados ao Ar Livre (Siscal, no Verão Maternity Hut Covering Evaluation in Outdoor Pig Production System, Summer Data

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    Paulo Giovanni de Abreu

    2001-12-01

    Full Text Available O objetivo deste trabalho foi estudar as condições térmicas ambientais de diferentes materiais de cobertura de cabana de maternidade, no verão, utilizando os seguintes tratamentos: 1 cabana de maternidade coberta com fécula de isopor 2 cabana de maternidade coberta com isolamento de alumínio 3 cabana de maternidade coberta com tela e capim na cobertura 4 cabana de maternidade coberta com lona e capim na cobertura 5 ambiente ao ar livre e 6 à sombra da árvore. O delineamento experimental usado foi em blocos casualizados, em esquema de parcelas subdivididas, com 6 tratamentos nas parcelas, 5 horas nas subparcelas e 3 repetições. A categoria animal utilizada foi porcas lactantes, Landrace x Large White, distribuídas aleatoriamente por ordem de parto. Foi determinada a Umidade Relativa do Ar (UR, a Velocidade do Ar, a Temperatura Ambiente (Ta e foram calculados o Índice de Temperatura de Globo e Umidade (ITGU e a Carga Térmica Radiante (CTR. Apesar de os materiais utilizados como cobertura de maternidade terem melhorado o conforto térmico das porcas em relação as condições ambientais, ainda, não foram suficientes em atender as condições ideais de conforto térmico.The objective of this study was to evaluate the environmental thermal conditions of different maternity hut covering materials, in the summer period through the following treatments: 1 maternity hut with polystyrene fecula covering 2 maternity hut with isolation of aluminum covering 3 maternity hut with screen and grass covering 4 maternity hut with canvas and grass covering 5 outdoor environment 6 under shade a tree. The six treatments were arranged in a randomized split-plot design where the six treatments were in the plot with five schedules hours in the subplots and three replicates. Sow lactantes Landrace x Large White were alloted at random considering farrowing order. Relative Humidity Air (RH, Air Speed, and Environmental Temperature (Te data were determined

  3. Cultivo de Spirulina maxima ao ar livre - I. Inverno

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    Rogério Lacaz Ruiz

    1990-12-01

    e noturno indicaram que o melhor período de produção de biomassa durante o dia foi das 8 - 13 h e a produtividade atingiu valor máximo de 8,08 g/metro quadrado/dia. Durante todo o experimento foi necessário adicionar água ao sistema, devido à ausência de chuvas; e o total acrescentado equivaleu a 72,14 mm de chuva.

  4. Permeabilidade ao ar em Latossolo Vermelho sob diferentes sistemas de manejo

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    Sueli Rodrigues

    2011-02-01

    Full Text Available A permeabilidade ao ar pode ser utilizada para avaliar alterações que ocorrem na estrutura do solo em virtude da adoção de diferentes sistemas de manejo. Este estudo testou a hipótese de que o menor revolvimento do solo sob sistema plantio direto resulta na formação de poros mais contínuos e melhor condição de aeração no solo. O objetivo deste trabalho foi avaliar, por meio da permeabilidade ao ar (Ka, da porosidade de aeração (εa e dos índices de continuidade de poros (K1 e N, a aeração em um Latossolo Vermelho distrófico sob preparo convencional (PC e sistema plantio direto (SPD. Oitenta amostras de solo (2 tratamentos x 2 profundidades x 20 repetições com estrutura indeformada foram coletadas de cada sistema de manejo do solo nas profundidades de 0-0,10 e 0,10-0,20 m em área experimental do Instituto Agronômico do Paraná, no município de Ponta Grossa, Paraná. Depois de saturadas e equilibradas em seis potenciais mátricos (-2, -6, -10, -30, -70 e -100 kPa, determinou-se a permeabilidade ao ar e a porosidade de aeração em cada potencial. Também foram determinados a densidade do solo, a densidade de partícula, o carbono orgânico e a porosidade. A densidade do solo não consistiu em fator limitante, ficando abaixo do limite crítico para solos argilosos nos dois sistemas. No SPD, o maior volume de microporos resultou em maior retenção de água no intervalo de umidade avaliado (-2 a -100 kPa e em maior volume de poros bloqueados para o fluxo de ar (εb, ou seja, redução de Ka. Na profundidade avaliada (00,20 m, os índices de continuidade de poros (K1 e N revelaram que o PC apresentou poros mais contínuos do que o SPD, contradizendo a hipótese testada.

  5. Perfil dos idosos usuários das academias ao ar livre para a terceira idade

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    Wesley Lessa Pinheiro

    2017-03-01

    Full Text Available Objetivo: Descrever o perfil dos idosos usuários das academias ao ar livre para a terceira idade de Fortaleza,Ceará. Métodos: Estudo transversal, envolvendo uma amostra de 374 idosos com idade maior ou igual a 60 anos, realizado entre os meses de outubro de 2015 e abril de 2016, nas academias ao ar livre para a terceira idade em Fortaleza, Ceará. Aplicou-se um questionário contendo questões sobre dados sociodemográficos, condições de saúde e hábitos de vida autorrelatados, e sobre a utilização dos equipamentos. Mensurou-se o peso e a altura para a obtenção do índice de massa corporal (IMC. Resultados: A maioria dos entrevistados era mulher (56,7%, n=212 e com faixa etária entre 60 e 69 anos (66,8%, n=250. As principais condições de saúde autorrelatadas foram hipertensão (40,9%, n=153, colesterol alto (32,4%, n=121 e osteoartrite (26,2%, n=98. Entre os hábitos de vida, o consumo de bebida alcoólica (31,6%, n=118 foi o mais relatado. Verificou-se que 42,8% (n=160 encontrava-se com excesso de peso. A maioria utilizava os equipamentos há mais de um ano (68,2%, n=255, até 30 minutos por dia (49,5%, n=185, cinco ou mais dias durante a semana (51%, n=191, tendo em grande parte percebido melhora na saúde (93,6%, n=350. Conclusão: Os idosos apresentaram um perfil jovem e ativo, cujas condições de saúde de maior prevalência podem ser facilmente manejadas com a prática de atividade física, e apresentam características semelhantes independentemente da situação econômica em que se encontram inseridos.

  6. MICOBIOTA ASSOCIADA À MADEIRA SERRADA DE Eucalyptus grandis HILL EX MAIDEN DURANTE A SECAGEM AO AR LIVRE

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    Paulo Fernando Trugilho

    2006-02-01

    Full Text Available O objetivo principal deste trabalho foi o de acompanhar a secagem ao ar livre da madeira serrada de Eucalyptus grandis conduzida na região de Lavras, MG e identificar a micobiota associada à madeira em diversas fases da secagem. As tábuas foram cortadas de oito toras de 3,0 m de comprimento, oriundas de três árvores, com 27 anos de idade, plantadas em área experimental da UFLA. Dos resultados, pôde-se concluir que a secagem da madeira de Eucalyptus grandis ao ar livre, iniciada em janeiro, consumiu 158 dias até atingir umidade próxima a 12,5%. A curva de secagem foi representada por uma equação logarítmica com coeficiente de determinação (R2 igual a 98,3%. Os fungos causadores de bolores superficiais e de manchas tiveram maior ocorrência no início da secagem. As mais altas freqüências de fungos, verificadas no início da secagem, foram observadas para Penicillium spp. e Pestalotiopsis sp. O fungo Lentinus lepideus ocorreu com maior freqüência no final da secagem.

  7. Projecto 254 - Produção de suínos ao ar livre : unidade de demonstração Programa AGRO

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    Marinho, M.C.; Dias, S.F.; Rodrigues, J.P.V.

    2006-01-01

    A produção de suínos ao ar livre pode contribuir para a preservação e valorização das raças autóctones e dos produtos delas derivados, evitando assim a sua extinção. O projecto, Produção de suínos ao ar livre – Unidade de demonstração, cujo período de execução vai de setembro de 2004 a dezembro de 2006, tem como principal objectivo demonstrar a tecnologia de produção de leitões ao ar livre. Programa AGRO - Projecto 254, Medida 8.1.

  8. Biomassa microbiana em amostras de solos secadas ao ar e reumedecidas Microbial biomass in air dried and rewetted soil samples

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    Antônio Samarão Gonçalves

    2002-05-01

    Full Text Available O objetivo do trabalho foi avaliar a viabilidade do condicionamento de amostras como terra fina secada ao ar (TFSA por curto período, para a determinação do carbono da biomassa microbiana (BMS-C, pelo método da fumigaçãoextração, e verificar a respiração microbiana basal (RB do solo. O condicionamento como TFSA, procedendo-se à fumigação para a análise da BMS-C imediatamente ou 24 horas após o reumedecimento, proporcionou valores de BMS-C para os solos Podzólicos, Latossolo Vermelho-Amarelo álico e Orgânico, semelhantes aos valores dos seus controles. Os solos Glei Pouco Húmico e Vertissolo apresentaram valores de BMS-C similares aos do controle a partir de 24 horas de incubação; o solo Planossolo arenoso apresentou valores similares aos do controle com 72 horas, e a Rendizina, com 168 horas de incubação. Na maioria dos solos, a RB determinada na TFSA apresentou valores maiores do que os do tratamento-controle, quando avaliada imediatamente ou 24 horas após o reumedecimento a 60% da capacidade máxima de retenção de água, seguida de queda e manutenção em níveis semelhantes ao do controle nos períodos subseqüentes. O précondicionamento, de curta duração, como TFSA, é promissor para a determinação da BMS-C, quando níveis e períodos adequados de reumedecimento são adotados.The objective of this work was to evaluate the utilization of short term air dried soil samples in a determination of soil microbial biomass (SMB-C, by a fumigationextraction method, and soil microbial basal respiration (BR. Zero time or 24 hours rewetting incubation period before fumigation procedure gave values of SMB-C similar to those of the control for the Podzolic soils, Allic RedYellow Latosol and Organic soil. Low Humic Gley and Vertisol soils gave values of SMB-C similar to those of the control for periods of incubation equal or higher than 24 hours. Planosol (sandy soil and Rendzina soils gave values of SMB-C similar to the

  9. Sistema de aquisição de dados para equipamento de medida da permeabilidade intrínseca do solo ao ar

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    Luciano Roberto da Silveira

    2011-04-01

    Full Text Available A permeabilidade intrínseca - ou simplesmente permeabilidade do solo ao ar - é uma propriedade importante para a identificação de alterações no espaço poroso do solo causadas pelas práticas de manejo, na estimativa de propriedades do solo mais difíceis e onerosas e na composição de modelos de fluxo de fluidos em solos agrícolas e em solos contaminados. O objetivo do presente estudo foi construir um sistema de aquisição de dados (módulo eletrônico e programa computacional para a medida da permeabilidade do solo ao ar em laboratório, utilizando-se materiais disponíveis no local e ferramentas computacionais de acesso livre. O sistema de aquisição de dados mostrou-se bastante preciso na determinação da permeabilidade do solo ao ar, com intervalo de confiança de 9,42 ± 0,085 μm² (95 %, para uma amostra-padrão constituída de partículas com diâmetro de 0,106 a 0,250 mm da fração areia de um Latossolo Vermelho-Amarelo textura média. A estimativa da permeabilidade do solo ao ar, considerando a viscosidade dinâmica do ar em função da temperatura, foi significativamente maior que a estimativa com valor fixo de viscosidade dinâmica em aproximadamente 20 ºC. A medição realizada em uma amostra de solo com estrutura indeformada de um Latossolo Vermelho foi tão precisa quanto à da amostra-padrão, e a estimativa da massa de água removida da amostra foi de 3,27 mg.

  10. Relação entre baixo peso ao nascer e a poluição do ar no Município de São Paulo

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    Andréa Medeiros

    2005-12-01

    Full Text Available OBJETIVO: A poluição do ar tem sido investigada como possível determinante do baixo peso ao nascer. O objetivo do estudo foi verificar o efeito da poluição do ar sobre o peso ao nascer. MÉTODOS: Foram analisados todos os partos de mães residentes no Município de São Paulo, nos anos de 1998 a 2000. Estimaram-se as prevalências de baixo peso ao nascer conforme características do recém-nascido, da mãe e do parto. Apenas os distritos mais centrais de São Paulo foram incluídos, totalizando uma amostra de 311.735 nascimentos. Para avaliação do efeito da poluição do ar foram excluídos os prematuros, gemelares e analisados somente os nascimentos das áreas mais centrais da cidade. Os elementos poluentes analisados foram ozônio (O3, dióxido de enxofre (SO2, dióxido de nitrogênio (NO2, partículas em suspensão (PM10 e monóxido de carbono (CO. O efeito da exposição materna à poluição do ar no peso ao nascer foi avaliado por meio de regressão linear e logística. RESULTADOS: Do total analisado, 4,6% dos recém-nascidos apresentaram menos de 2.500 g ao nascer. A exposição materna ao CO, PM10 e NO2 durante o primeiro trimestre de gestação mostrou associação estatisticamente significante com a diminuição no peso do recém-nascido. CONCLUSÕES: Os resultados reforçam que a exposição materna à poluição do ar no primeiro trimestre de gestação pode contribuir para o menor ganho de peso do feto.

  11. Mujeres y criados, una comedia recuperada de Lope de Vega

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    García-Reidy, Alejandro

    2013-12-01

    Full Text Available Lope de Vega’s corpus of plays is one of the most studied of Spanish Baroque theater, although it still presents numerous problems that need to be solved. In this article I study the extant manuscript of a play entitled Mujeres y criados in relation to a play by Lope of the same title, which several catalogues consider lost. In the first part of my paper I prove Lope’s authorship of the play based on internal elements of the text and the manuscript’s relation to several seventeenth-century documents. In the second part of this article I study the most relevant characteristics of this play. I focus my attention on the traits of the urban comedy it presents, the subversion of certain themes —such as social hierarchies or honor— that takes place and the predominant role Lope gave women in the play’s plot.El corpus dramático de Lope de Vega es uno de los más estudiados en el teatro barroco español, pero todavía encierra numerosas lagunas que quedan por aclarar. En el presente trabajo estudio el manuscrito que se conserva de una comedia titulada Mujeres y criados en relación con una comedia homónima de Lope que varios catálogos dan por perdida. En la primera parte demuestro la autoría lopesca de la obra a partir de elementos internos del texto y de la relación que guarda el manuscrito con noticias proporcionadas por documentación de la época. En la segunda parte del artículo estudio las características más relevantes de esta comedia, destacando su inserción en el género de la comedia urbana, la subversión que se lleva a cabo de ciertos temas, como las jerarquías sociales o el honor, y el papel predominante que Lope concede a las mujeres en la trama de la obra.

  12. Educação ao ar livre pela aventura: o aprendizado de valores morais em expedições à natureza Education outdoors through adventure: learning moral values in nature expeditions

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    Flavio Theodor Kunreuther

    2012-06-01

    Full Text Available A educação ao ar livre, por meio de cursos no formato expedição, ainda acontece de forma tímida no Brasil. Entende-se por expedição uma experiência educacional contínua, de múltiplos dias, em que alunos e instrutores aventuram-se em um trajeto em área remota da natureza de forma autossuficiente. O presente estudo analisa os cursos desse tipo. Por meio de entrevistas e questionários semiestruturados, investigou-se a aprendizagem dos alunos segundo suas próprias percepções e as dos educadores da instituição, com ênfase no desenvolvimento moral do indivíduo. Como parte do estudo de caso sobre um aluno adolescente participante de um dos cursos, entrevistou-se também uma psicóloga que coordena um abrigo para menores. Os resultados encontrados indicam que os cursos de educação ao ar livre caracterizam-se por experiências que estimulam trabalhos em grupo, debates sobre justiça e solidariedade, e reflexões sobre valores e princípios como coragem, esforço pessoal, disciplina, respeito e superação de limites. Os resultados também indicam que tal proposta educacional aufere experiências sensíveis e de conexão do ser humano com a natureza. Muito embora haja potencial educacional para a educação ao ar livre, a atuação do educador perante seus alunos é fundamental para que as experiências sejam física e psicologicamente seguras, alcancem seus potenciais pedagógicos de desenvolvimento da moralidade e ajudem as pessoas a desenvolverem uma consciência ambiental, manifestada por meio de ações concretas ao retornarem dos cursos para suas comunidades.Open air education through courses organized as expeditions is still incipient in Brazil. We understand an expedition as a continued educational experience taking several days in which students and instructors venture into a remote natural area in a self-sufficient way. The present study analyzes courses of this type. Using interviews and semi-structured questionnaires, it

  13. Ars disyecta Ars disyecta

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    Alejandra Castillo

    2012-07-01

    Full Text Available Bajo la nominación Ars Disyecta se busca exponer el vínculo entre artes visuales, feminismo y metamorfosis. Las prácticas artísticas feministas aquí presentadas se proponen perturbar el espacio metafórico heredado de la diferencia sexual (pensemos, por ejemplo, en las palabras engendramiento, matriz, vida, compenetración o invaginamiento. En este sentido, la nominación Ars disyecta pone en escena un conjunto de prácticas e intervenciones que intentan interrumpir la matriz de la diferencia, desestabilizando lo femenino desde aquellas figuras que se resisten a la lógica de la totalidad y de un tiempo propio. Buscando seguir la huella de un arte disyecto es que interrogaré en este ensayo aquellas autorías feministas que en el arte contemporáneo trafican con las huellas del contagio, la mutación y la alteridad.This article aims to present the relation between visual arts, feminism I and metamorphosis. The feminist artistic practices portrayed in this article attempt to question categories inherited from the metaphor of sexual difference such as engendering, matrix and life. From this perspective, Ars disyecta will establish a set of artistic practices and interventions that intend to interrupt the proper idea of «feminine difference». Following this line of argument, I will discuss in this article a few contemporary feminist works of art that could be defined by words such as contagious, mutation and otherness.

  14. Percepções e sentimentos de adolescentes criados por avós

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    Paixão, Flávia Juliana Dourado

    2013-01-01

    Este estudo tem como objetivo conhecer as percepções e os sentimentos de adolescentes criados por avós. Busca-se, especificamente: 1) descrever a percepção dos adolescentes sobre seus avós, seus sentimentos por eles e as relações estabelecidas com os mesmos; 2) descrever como percebem as figuras parentais biológicas, seus sentimentos por eles e suas relações com os mesmos; 3) compreender a experiência dos adolescentes acerca do fato de serem criados pelos avós; e 4) descrever a...

  15. Exposição ao mercúrio e ao arsênio em Estados da Amazônia: síntese dos estudos do Instituto Evandro Chagas/FUNASA Exposure to mercury and arsenic in Amazon States: a summary of studies by the Evandro Chagas Institute/FUNASA

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    Elisabeth C. de Oliveira Santos

    2003-06-01

    Full Text Available Este artigo é uma revisão das pesquisas da Seção de Meio Ambiente do Instituto Evandro Chagas/FUNASA sobre exposição ao mercúrio (Hg no vale do rio Tapajós e Estado do Acre, e exposição ao arsênio (As através de resíduos da exploração de manganês (Mn realizada pela ICOMI deixados no Porto de Santana-AP. Em relação ao mercúrio, têm sido pesquisadas populações sob risco através da via respiratória ou alimentar. No primeiro caso, os trabalhadores de casas de compra e venda de ouro têm apresentado teores mais elevados de Hg em urina do que os garimpeiros estudados. No segundo caso, as populações ribeirinhas têm mostrado níveis diferenciados de exposição (Hg em cabelo. Comunidades ribeirinhas situadas em áreas não afetadas pelo mercúrio da garimpagem e com hábitos alimentares semelhantes às de área de risco têm sido avaliadas, visando a construção de parâmetros de normalidade regional. São também pesquisados os teores de Hg em materiais ambientais e na biota aquática. Os estudos de saúde humana e ambiente na cidade de Santana-AP objetivaram avaliar as fontes e possíveis vias de exposição da população da comunidade do Elesbão ao arsênio. Verificou-se a existência de fonte de risco através dos rejeitos de Mn, porém os níveis de As na água consumida pela população mostraram-se dentro dos parâmetros de normalidade. As médias encontradas em sangue e cabelo coincidem com médias de normalidade referidas na literatura, em populações não expostas, e as associações entre variáveis epidemiológicas, avaliação clínico-laboratorial e os teores de arsênio não mostraram significância estatística.This article is a review of the studies carried out by Environmental Section of the Evandro Chagas Institute/FUNASA on mercury (Hg exposure in the Tapajós river basin, and arsenic exposure (As due to residues of the manganese (Mn exploration, performed by ICOMI and left at the port of Santana

  16. Características biológicas de parasitóide de ovos criados em diferentes hospedeiros

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    Ariana Lisboa Meira

    2017-04-01

    Full Text Available As espécies de Trichogramma são agentes biológicos que contribuem para o controle de lepidópteros. Objetivou-se neste trabalho identificar qual espécie de Trichogramma apresenta melhor desempenho biológico quando criados em ovos de Anagasta kuehniella (Lepidoptera: Pyralidae, Helicoverpa zea (Boddie (Lepidoptera: Noctuidae e Plutella xylostella Linnaeus (Lepidoptera: Plutellidae. Desta forma os parâmetros biológicos avaliados no período de ovo a adulto foram duração de ovo a adulto e percentual de emergência e no estágio adulto avaliou-se número de ovos parasitados, número de indivíduos por ovo e razão sexual em Trichogramma atopovirilia Oatman & Planter (Hymenoptera: Trichogrammatidae e Trichogramma exiguum Pinto & Planter (Hymenoptera: Trichogrammatidae.  Para o período de ovo a adulto, A. kuehniella, H. zea e P. xylostella não apresentaram diferença quando criados com as mesmas espécies de Trichogramma para a duração do ciclo de desenvolvimento e não houve diferença para o percentual de emergência entre os três hospedeiros em estudo. Em relação aos parâmetros avaliados no estágio adulto, para número de ovos parasitados, somente A. kuehniella, diferenciou entre as espécies de Trichogramma. O número de indivíduos por ovo, os maiores valores foram observados quando as espécies de Trichogramma foram criadas com ovos de H. zea. A razão sexual, T. atopovirilia diferiu apenas para A. kuehniella. As duas espécies de Trichogramma estão aptas a se desenvolverem nos hospedeiros A. kuehniella e P. xylostella. Contudo para o hospedeiro H. zea, T. exiguum foi à espécie que obteve melhor desempenho, parasitando maior número de ovos e obtendo maior número de indivíduos por ovo.

  17. Hiperplasia em túnicas de artérias coronárias de beijupirás criados em sistema offshore

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    V.F. Pedrosa

    2015-06-01

    Full Text Available As lesões coronarianas já foram relatadas em espécies de peixes anádromos, com características semelhantes às observadas em aterosclerose humana, mas não em peixes cultivados sem interferência de padrões reprodutivos. Objetivou-se descrever lesões coronarianas em beijupirá (Rachycentron canadum criado em sistema offshore, em 54 exemplares coletados ao longo do cultivo de oito meses. Amostras de tecido cardíaco de alevinos e juvenis foram submetidas à análise histopatológica e à microscopia eletrônica de transmissão (MET, para visualização de lesões coronarianas, sendo as lâminas histológicas coradas pela técnica de hematoxilina-eosina, ácido periódico de Schiff, alcian blue e reticulina de Gomori. Exames realizados pela fotomicroscopia de luz evidenciaram lesões arteriais caracterizadas por hiperplasia das túnicas íntima e média de artérias coronárias em, respectivamente, 29,63% e 79,63% dos animais, com redução do lúmen arterial. Na MET, foram observadas alterações na estrutura das coronárias com espessamento do endotélio e membrana basal, proliferação de fibroblastos e fibras colágenas, com acúmulo de material lipídico subendotelial, resíduos celulares aderidos à membrana basal e vesículas pinocitóticas com presença de lisossomos isolados. Constatou-se que os peixes da espécie Rachycentron canadum criados em cativeiro desenvolvem lesão arterial do tipo crônica degenerativa inflamatória.

  18. Criados rurales: el caso de Italia desde una perspectiva comparada (siglos XVI al XX

    Directory of Open Access Journals (Sweden)

    Raffaella Sarti

    2017-12-01

    Full Text Available Con las ideas que reconocidos expertos han expuesto acerca del presunto perfil de los criados rurales italianos como punto de partida, este artículo da cuenta de la significación y las características de este colectivo, al tiempo que entra en contradicción con aquellas. Si bien el porcentaje de sirvientes en la población rural difiere en función de la época y el lugar considerados, este fue en algunos casos tan elevado como en diversas áreas del centro y norte de Europa. En varias zonas de Italia en las que el número de criados rurales fue relevante, también fueron comunes las familias complejas; un hecho que cuestiona el vínculo establecido entre el life-cycle service y la neolocalidad. Asimismo, y aun cuando en aquellas mismas zonas el acceso al matrimonio fue más bien bastante tardío, no hay indicios de que en gran parte de Italia (exceptuando Cerdeña y algunas partes del antiguo Tirol austríaco, hoy bajo dominio italiano haya existido una vinculación entre la presencia de life-cycle servants y el matrimonio tardío. Aunque es preciso examinar la cuestión con más detalle, el modelo que parece imponerse en Italia implicaba que los jóvenes comenzaran muy pronto a trabajar como criados agrícolas y dejaran de serlo antes de los 20 años; por tanto, mucho antes de casarse. La principal razón por la que dejaban su hogar para servir no era tanto acumular recursos con miras al matrimonio cuanto aliviar las cargas familiares. Las implicaciones teóricas de estos resultados son también aquí objeto de discusión.

  19. Ars Electronica

    DEFF Research Database (Denmark)

    Kristensen, Thomas Bjørnsten

    2009-01-01

    Anmeldelse af Ars Electronica festivalen 3. - 8. september, 2009 i Linz, Østrig, der fejrede 30 års jubilæum under temaet "Human Nature". Festivalen fokuserer på interaktion mellem menneske, teknologi, kunst og samfund med særlig vægt på udviklingen af computeren og det digitale. Udgivelsesdato: 15.12...

  20. Parâmetros hematológicos e bioquímicos da tilápia-do-Nilo (Oreochromis niloticus L. sob estresse por exposição ao ar Hematological parameters of Nile Tilapia (Oreochromis niloticus L. under air exposure stress

    Directory of Open Access Journals (Sweden)

    Roberta Dias da Silva

    2012-12-01

    Full Text Available No presente trabalho avaliaram-se os parâmetros hematológicos e bioquímicos de exemplares adultos de tilápias (Oreochromis niloticus sob a influência do fator estresse fisiológico em animais submetidos à exposição ao ar durante a engorda em sistema raceway. Foram analisados o eritrograma, teor de hemoglobina, volume globular, o volume corpuscular médio (VCM, a hemoglobina corpuscular média (HCM, a concentração de hemoglobina corpuscular média (CHCM, o leucograma, contagem diferencial de leucócitos, o plaquetograma, a glicose, a proteína total, o colesterol, o triglicerídeo e os eletrólitos (cálcio, cloretos, sódio e potássio. Os resultados revelaram que houve uma homogeneidade de distribuição para hemácias, volume globular, hemoglobina, índices hemantimétricos, proteína total, glicose, colesterol, e íons séricos, indicados pelos valores relativamente baixos do coeficiente de variação. Houve correlação positiva somente para leucócitos totais, células de defesa orgânica (neutrófilos e linfócitos, glicose, colesterol, sódio e cálcio. Quanto ao leucograma, à medida que os animais foram expostos ao ar, o número de leucócitos diminuiu gradativamente (leucopenia, ocorrendo simultaneamente neutrofilia e linfopenia. O índice glicêmico constituiu um bom indicador de estresse fisiológico, devido à hiperglicemia (82,0±20,88mg/dL demonstrada nos tratamentos. A exposição ao ar constituiu um fator de desequilíbrio na homeostase iônica, e na síntese de colesterol endógeno. Entretanto, o tempo de recuperação não ocasionou a completa reabilitação fisiológica frente ao desafio imposto.The present study evaluated the hematological and biochemical parameters of adult tilapia (Oreochromis niloticus under the influence of the physiological stress factor in animals submitted to air exposure during fattening in raceway system. Blood cell count, hemoglobin, hematocrit, mean corpuscular volume (MCV, mean

  1. Efeitos ambientais da produção de suínos ao ar livre: evolução e distribuição espacial das formas de P no solo e perdas de P na água de drenagem Environmental impact of outdoor pig production: soil P forms evolution spatial distribution and P losses in drainage waters

    Directory of Open Access Journals (Sweden)

    Carmo Horta

    2012-06-01

    Full Text Available A produção de suínos ao ar livre é considerada pelos consumidores como um modo de produção mais amigo do ambiente e do bem-estar animal. No entanto, os nutrientes contidos na ração e no "excreta" dos suínos são continuamente introduzidos no solo conduzindo a aumentos significativos desses nutrientes no solo, em especial do fósforo (P. Esta continua adição de P ao solo pode exceder a sua capacidade de retenção originando perdas significativas de P para as águas de drenagem e de escoamento superficial, contribuindo para a poluição difusa das águas superficiais. O principal objectivo deste trabalho foi avaliar o impacto da produção de suínos ao ar livre sobre o teor em P do solo avaliando a sua distribuição espacial e temporal, e avaliar também a perda de P através das águas de drenagem interna do solo. A unidade experimental de produção de suínos ao ar livre deste trabalho tem 2.8 ha, um declive entre 5 e 30% e uma carga animal de 9 adultos / ha. Observou-se um aumento do P do solo, quer do P biodisponível (P Olsen, P-Ol quer do P inorgânico (Pi ou orgânico (Po. No Inverno observaram-se elevadas perdas de P por erosão e escoamento superficial, mas ao longo do tempo observou-se um aumento global do P no solo. Um teor em P-Ol > 20 mg kg-1 originou um aumento significativo na perda de P para as águas de drenagem interna. Melhores práticas de maneio da unidade experimental, bem como uma escolha da área de produção menos susceptível à erosão, conduzirão a uma prevenção nos riscos de perda de P e na eutrofização das águas superficiais.When compared with intensive indoor production, outdoor pig production is considered by consumers as the production system that causes the least negative environmental effects and contributes to animal welfare. Nevertheless, the continuous input of nutrients in food or pig excretions, increases soil nutrients levels, as is the case with phosphorus (P. This continuous soil P

  2. Arsenic exposure assessment of children living in a lead mining area in Southeastern Brazil Avaliação da exposição de crianças ao arsênio em área de mineração de chumbo na Região Sudeste do Brasil

    Directory of Open Access Journals (Sweden)

    Alice Momoyo Sakuma

    2010-02-01

    Full Text Available Environmental contamination by arsenic compounds in the Ribeira River Valley, São Paulo, Brazil has already been observed. Lead mining and refining activities had been carried on since late colonial times and finished recently, at the end of 1995. The source of As in the region is known to be mainly from arsenopirite geological presence in the lead ore. Chronic exposure to arsenic compounds may cause peripheral vascular disorders, hyperpigmentation, hiperkeratosis and cancer of the skin, bladder, lung, liver and other internal organs. The purpose of this study was to assess children exposure to arsenic from environmental sources in the region. Urine samples from children between 7 to 14 years old were collected at the following localities: Cerro Azul (Paraná; urban areas of Ribeira (São Paulo and Adrianópolis (Paraná; Vila Mota neighborhood (rural area of Adrianópolis and Serra neighborhood (Iporanga, São Paulo, identified as groups 1, 2, 3 and 4, respectively. Group 1 was considered as non-exposed control group. Toxicologically relevant forms of As were determined by atomic absorption spectrometry with hydride generation system. The median values of urine arsenic levels obtained in groups 1, 2, 3 and 4 were respectively: 3.60, 6.30, 6.41 e 8.94μg/L.Contaminação ambiental por compostos de arsênio no Vale do Ribeira, São Paulo, Brasil, tem sido já observada. As atividades de mineração e refinamento do chumbo têm ocorrido desde a época colonial e foram encerradas recentemente, no final de 1995. A principal fonte de arsênio na região é arsenopirita que ocorre geologicamente no minério de chumbo. Exposição crônica aos compostos de arsênio podem causar desordens vasculares periféricas, hiperpigmentação, hiperqueratose, além de câncer de pele, bexiga, pulmão, fígado e outros órgãos. O objetivo do presente estudo foi avaliar a exposição de crianças ao arsênio proveniente de fontes ambientais na região. Amostras de

  3. Como responder ao momento presente?

    Directory of Open Access Journals (Sweden)

    Maria Filomena Molder

    2013-12-01

    Full Text Available http://dx.doi.org/10.5007/1984-784X.2013v13n19p13 Foi com esta pergunta — já um efeito de um primeiro encontro entre Irene Pimentel e eu própria — que decidimos desafiar colegas, estudantes e funci­onários da nossa Faculdade, FCSH (Faculdade de Ciências Sociais e Huma­nas, de outras Faculdades da Universidade Nova de Lisboa, de outras Uni­versidades e todos os interessados em con­siderar e discutir em comum aquilo que se passava em Portugal e que no anúncio da Jornada de 6 de De­zembro de 2012 se descrevia como um “processo de desmantela­mento social, económico e cultural sem precedentes — pese embora tantas compara­ções, baseadas na premissa da ‘eterna repetição’ — e cujas consequências não param de exceder as previsões dos responsáveis por esse desmantelamento”. Acedendo com todo o empenho e gratidão ao convite que me foi dirigido por Humberto Brito para fazer uma resenha da Jornada a publicar no primeiro número de Forma de Vida (saúdo a revista e o título, decidi-me, no entanto, a pôr de lado a resenha, que sob a forma de “Editorial” será em breve publi­cada no blogue Responder ao Momento Presente, entre­tanto criado, conjuntamente com os textos escritos pelos nossos convidados, com as parti­cipações de pessoas que corresponderam ao nosso apelo e ainda com contri­bui­ções que se alargaram para lá da Jornada; a que se juntará uma gravação em video, também disponível no Youtube.   Texto publicado originalmente em Forma de Vida, Lisboa, n.1, fev. 2013. Agrade­cemos à autora por permitir a republicação neste número do Boletim. [N.E.

  4. Polimorfismo da hemoglobina de bubalinos (Bubalis bubalis da raça Murrah criados no Estado de São Paulo, Brasil

    Directory of Open Access Journals (Sweden)

    A. M. F. Rosenfeld

    2006-03-01

    Full Text Available Os tipos de hemoglobina foram determinados em 41 amostras de sangue de bubalinos sadios da raça Murrah, criados no município de Roseira, no Estado de São Paulo, sendo cinco animais machos e 36 fêmeas. As amostras sangüíneas foram colhidas por venipunção da jugular, em tubos contendo EDTA e a determinação dos tipos de hemoglobina foi realizada pela técnica de eletroforese alcalina em acetato de celulose, utilizando-se o Tris-EDTA-Borato (pH 8,6 como solução tampão. Duas bandas de migração relativas aos alelos HbA e HbB foram observadas, identificando-se dois genótipos Hb-AA e Hb-AB e as suas freqüências na população avaliada foram: 95,1% dos bubalinos apresentaram o tipo heterozigoto Hb-AB e 4,9% o tipo homozigoto Hb-AA. O polimorfismo da hemoglobina foi observado nos bubalinos e o genótipo heterozigoto Hb-AB foi o mais freqüente.

  5. arXiv ARS Leptogenesis

    CERN Document Server

    Drewes, M.; Hernandez, P.; Kekic, M.; Lopez-Pavon, J.; Racker, J.; Rius, N.; Salvado, J.; Teresi, D.

    2018-02-28

    We review the current status of the leptogenesis scenario originally proposed by Akhmedov, Rubakov and Smirnov (ARS). It takes place in the parametric regime where the right-handed neutrinos are at the electroweak scale or below and the CP-violating effects are induced by the coherent superposition of different right-handed mass eigenstates. Two main theoretical approaches to derive quantum kinetic equations, the Hamiltonian time evolution as well as the Closed-Time-Path technique are presented, and we discuss their relations. For scenarios with two right-handed neutrinos, we chart the viable parameter space. Both, a Bayesian analysis, that determines the most likely configurations for viable leptogenesis given different variants of flat priors, and a determination of the maximally allowed mixing between the light, mostly left-handed, and heavy, mostly right-handed, neutrino states are discussed. Rephasing invariants are shown to be a useful tool to classify and to understand various distinct contributions to...

  6. Small angle Ar2+ + Ar collisions

    International Nuclear Information System (INIS)

    Stevens, J.J.

    1983-01-01

    Electron capture in Ar 2+ + Ar is studied at low keV energies. Using Ar 2+ + He collisions as a calibration, it is shown that the dominant single electron capture process is endothermic and of the type Ar 2+ ( 3 P) + ArAr + ( 2 P) + Ar + (3s 2 3p 4 nI), with nI primarily being 3d and 4p. Weaker exothermic processes are also found and are due mainly to the existence of long-lived highly-excited states in the incident Ar 2+ beam. The direct scattering and double electron capture processes are also studied. Direct scattering occurs with no target excitation. Differential cross sections are presented for the collision processes. The single electron capture results are interpreted using a simple model in which a strongly attractive intermediate state couples with incident and outgoing channels

  7. Ar-Ar_Redux: rigorous error propagation of 40Ar/39Ar data, including covariances

    Science.gov (United States)

    Vermeesch, P.

    2015-12-01

    Rigorous data reduction and error propagation algorithms are needed to realise Earthtime's objective to improve the interlaboratory accuracy of 40Ar/39Ar dating to better than 1% and thereby facilitate the comparison and combination of the K-Ar and U-Pb chronometers. Ar-Ar_Redux is a new data reduction protocol and software program for 40Ar/39Ar geochronology which takes into account two previously underappreciated aspects of the method: 1. 40Ar/39Ar measurements are compositional dataIn its simplest form, the 40Ar/39Ar age equation can be written as: t = log(1+J [40Ar/39Ar-298.5636Ar/39Ar])/λ = log(1 + JR)/λ Where λ is the 40K decay constant and J is the irradiation parameter. The age t does not depend on the absolute abundances of the three argon isotopes but only on their relative ratios. Thus, the 36Ar, 39Ar and 40Ar abundances can be normalised to unity and plotted on a ternary diagram or 'simplex'. Argon isotopic data are therefore subject to the peculiar mathematics of 'compositional data', sensu Aitchison (1986, The Statistical Analysis of Compositional Data, Chapman & Hall). 2. Correlated errors are pervasive throughout the 40Ar/39Ar methodCurrent data reduction protocols for 40Ar/39Ar geochronology propagate the age uncertainty as follows: σ2(t) = [J2 σ2(R) + R2 σ2(J)] / [λ2 (1 + R J)], which implies zero covariance between R and J. In reality, however, significant error correlations are found in every step of the 40Ar/39Ar data acquisition and processing, in both single and multi collector instruments, during blank, interference and decay corrections, age calculation etc. Ar-Ar_Redux revisits every aspect of the 40Ar/39Ar method by casting the raw mass spectrometer data into a contingency table of logratios, which automatically keeps track of all covariances in a compositional context. Application of the method to real data reveals strong correlations (r2 of up to 0.9) between age measurements within a single irradiation batch. Propertly taking

  8. Densidade crítica ao crescimento de plantas considerando água disponível e resistência à penetração de um Argissolo Vermelho distrófico arênico Bulk density critical to the growth of plants considering available water and soil resistance to penetration of a Paleudalf

    Directory of Open Access Journals (Sweden)

    Cláudia Liane Rodrigues de Lima

    2007-08-01

    Full Text Available O estabelecimento de culturas está associado a condições restritivas impostas pelo tipo e pelo manejo de solo. O objetivo deste estudo foi avaliar o intervalo de densidade crítica de um Argissolo Vermelho distrófico arênico, considerando a disponibilidade de água para as culturas e os valores restritivos de resistência à penetração (1,5; 2,0; 2,5; 3,0 e 3,5MPa. A amostragem de um Argissolo Vermelho distrófico arênico sob plantio direto desde 1989, com estrutura de solo preservada, foi feita nas camadas de 0,00 a 0,10 m e 0,10 a 0,20m. As amostras (oito repetições foram saturadas em água, equilibradas em diferentes potenciais (-0,001; -0,004; -0,006; -0,033; -0,07 e -0,1MPa e dois grupos de amostras foram secadas em laboratório, por um período de 7 e 9 dias, perfazendo um total de 128 amostras. Após atingir o equilíbrio, foi avaliada a resistência à penetração e a densidade do solo. Um incremento na resistência à penetração possibilitou maiores intervalos de densidade adequados ao desenvolvimento das plantas, i.e., quando considerada uma resistência à penetração de 2MPa, o intervalo de densidade adequado foi de 1,44Mg m-3 a 1,76Mg m-3 e, para uma resistência de 3MPa, o intervalo foi de 1,53 a 1,88Mg m-3. Valores superiores e inferiores ao intervalo de densidade obtidos são críticos ao desenvolvimento de culturas, considerando a resistência à penetração e a disponibilidade de água.Crop establishment is linked to restrictive conditions imposed by soil type and soil management. This study aimed at evaluating the interval of bulk density critical for a Paleudalf, considering water availability to the crops and restrictive values to the root resistance to penetration (1.5; 2.0; 2.5; 3.0 e 3.5MPa. Soil samples, from a Paleudalf under no-tillage since 1989, with preserved structure were collected in the layers of 0.00 to 0.10m and 0.10 to 0.20m depth. The samples (eight replicates were saturated in water and

  9. Contribuições ao estudo do brand equity integrado - perspectiva financeira e do consumidor - estudo de caso no mercado do futebol

    OpenAIRE

    Laura Mendes Louzada

    2015-01-01

    A marca é um importante ativo intangível para as empresas, que pode contribuir para aumentar o valor e o sucesso no mercado. O bom gerenciamento da marca exige um sistema para entender e medir como o valor da marca é criado. Tratado, na maioria das vezes, como brand equity, existem diversas perspectivas nas quais ele é abordado. Alguns modelos abordam perspectivas exclusivamente financeiras. Outros, exclusivamente relacionadas ao consumidor. Outros ainda, convergem ambas perspectivas. O prese...

  10. Ao leitor sem medo

    Directory of Open Access Journals (Sweden)

    José Eisenberg

    2000-05-01

    Full Text Available O texto resenha Ao leitor sem medo, de Renato Janine Ribeiro (Belo Horizonte, UFMG, 1999.This text is a review of Ao leitor sem medo by Renato Janine Ribeiro (Belo Horizonte, UFMG, 1999

  11. El papel de la institución en el escoger, acoger y acompañar al profesor universitario O papel da instituição para escolher, acolher e acompanhar ao professor universitário The role of the institution in choosing, receiving and chaperone professors in the university

    Directory of Open Access Journals (Sweden)

    Maria de Lourdes da Silva Marques Ferreira

    2011-03-01

    Full Text Available Objetivo. Analizar el papel de la institución en el proceso de escoger, acoger y acompañar al profesor universitario. Metodología. Estudio cualitativo cuyo cuerpo de análisis estuvo compuesto por 32 participaciones en un foro temático de un grupo de nueve profesionales del área de la salud. Resultados. Después de la contratación del profesor es necesario acogerlo y acompañarlo. Los profesores con mayor tiempo en la institución representan un papel importante en la acogida del nuevo compañero. El proceso de acompañamiento es una oportunidad para cambios y redefinición de reglas y debe ser apoyado por la evaluación permanente. La universidad como escenario legítimo de aprendizaje, producción y reconstrucción de conocimiento debe acompañar las transformaciones de la ciencia contemporánea y apoyar las exigencias interdisciplinarias en la construcción de nuevo conocimiento. Conclusión. Es fundamental el papel de la universidad en acoger y acompañar al docente desde su vinculación; así mismo la universidad debe favorecer el crecimiento del profesor, no solo apoyando los desafíos de su actividad pedagógica, sino principalmente a través del respeto de su autonomía.Objetivo. Analisar o papel da instituição ao escolher, acolher e acompanhar ao professor universitário. Metodologia. Estudo qualitativo, cujo corpo de análise esteve composto por 32 participações num foro temático de um grupo de nove profissionais da área da saúde. Resultados. Depois da contratação do professor, é necessário acolhê-lo e acompanhá-lo. Os professores com maior tempo de instituição representam um papel importante na acolhida do novo colega. O processo de acompanhamento é uma oportunidade para mudanças e redefinição de regras, e deve ser apoiado pela avaliação permanente. A universidade como palco legítimo de aprendizagem, produção e reconstrução de conhecimento deve acompanhar as transformações da ciência contemporânea e

  12. 40Ar/39Ar dating of pyrite

    International Nuclear Information System (INIS)

    York, D.; Masliwec, A.; Kuybida, P.; Hanes, J.A.; Hall, C.M.; Kenyon, W.J.; Spooner, E.T.C.; Scott, S.D.

    1982-01-01

    To overcome difficulties encountered in the customary method of determining the age of mineralization of sulphide ore deposits by analysing silicate material, the sulphide minerals themselves have been examined to see if they contained sufficient potassium and argon for 40 Ar/ 39 Ar age determination. Initial results indicate that this is the case for pyrite from the Geco ore body in northwestern Ontario, Canada. (U.K.)

  13. Jejum alimentar na qualidade da carne de frangos de corte criados em sistema convencional Feed withdrawal periods in the quality of broilers meat raised in the conventional system

    Directory of Open Access Journals (Sweden)

    Janaina Boccia Jorge Castro

    2008-04-01

    Full Text Available O objetivo desta pesquisa foi avaliar o efeito de diferentes períodos de jejum alimentar (três, seis, nove, 12, 15 e 18 horas na perda de peso da ave viva, rendimento da carcaça quente e fria (antes e após o resfriamento no "chiller". Os atributos de qualidade da carne de peito de frango criados no sistema convencional tais como cor, capacidade de retenção de água (CRA, pH, força de cisalhamento e perda por cozimento foram avaliados. Neste experimento foram utilizados frangos de corte da linhagem Ross com 46 dias de idade. Os resultados mostraram que períodos prolongados de jejum alimentar teve efeito estatístico (P0,05 para o valor de L*, a* e b*, CRA, pH e perda por cozimento da carne de peito devido aos diferentes períodos de jejum alimentar. Os valores da correlação de Pearson mostraram uma correlação negativa (PThis research was aimed at evaluating the effect of different feed withdrawal (FW periods (3, 6, 9, 12, 15 and 18 hours on the live bird weight loss, dressed and chilled carcass yield (before and after of water chilling. The attributes of chilled breast meat quality of broilers raised in the conventional system were also evaluated, such as color, water holding capacity (WHC, pH, shear force and cooking loss. In this experiment, 46-day-old Ross broilers were used. The results of this study indicated that prolonged FW periods have a significant effect (P0.05 were observed for L*, a* and b values, WHC, pH, cooking losses and pH of the breast meat submitted to different FW periods. Pearson correlation values showed a negative (P<0.001 correlation between pH and L* value, and between L* value and WHC, which varied with FW periods.

  14. Aspectos hematológicos de caprinos (Capra hircus da raça Canindé criados no Rio Grande do Norte

    Directory of Open Access Journals (Sweden)

    Maria G.C. Oliveira

    2012-12-01

    Full Text Available Objetivou-se com este trabalho estudar o perfil hematológico de caprinos (Capra hircus da raça Canindé, criados no Estado do Rio Grande do Norte, como também a busca de valores de referência que se adequem à nossa região. Foram coletadas amostras sanguíneas de 58 animais clinicamente sadios, distribuídos em 4 grupos (machos acima de 5 meses, fêmeas gestantes, fêmeas não gestantes e filhotes até 4 meses de idade. A partir de única amostra de sangue de cada animal foram realizados o eritrograma (contagem de hemácias, hematócrito, hemoglobina, volume corpuscular médio e concentração de hemoglobina corpuscular média e o leucograma (contagem total e diferencial de leucócitos. Os dados obtidos foram avaliados por meio do teste de Tukey para variáveis paramétricas e Kruskal-Wallis seguido pelo teste de Dunn para não paramétricos em nível de significância de (p<0.05. Os resultados apontam para existência de maiores quantidades de He nos machos adultos e fêmeas não gestantes, diferente do que ocorre com o VCM; já com relação ao leucograma temos que os eosinófilos mostram-se mais elevados nas fêmeas adultas e os monócitos se elevam quando na presença da gestação. Os valores deste trabalho podem servir de referência para raça Canindé, tornando possível futuras interpretações para os parâmetros verificados, além de subsidiar novos estudos em animais hígidos ou doentes. Mostra a necessidade de pesquisas que evidenciem as condições semiáridas de manejo e alimentação, bem como a avaliação dos fatores de variação, sobre constituintes do sangue, que levem em conta o sexo, a idade e estado fisiológico dos animais.

  15. Protozoários ruminais de novilhos de corte criados em pastagem tropical durante o período seco

    OpenAIRE

    Silva,Kellerson Luiz da; Duarte,Eduardo Robson; Freitas,Claudio Eduardo Silva; Abrão,Flávia Oliveira; Geraseev,Luciana Castro

    2014-01-01

    Protozoários do rúmen podem representar 40% do nitrogênio total e 60% do produto final da fermentação e apresentam atividade celulolítica. Neste estudo, objetivou-se quantificar e identificar as populações de protozoários no rúmen de novilhos, criados exclusivamente em pastagem, durante o período seco do ano, no Norte de Minas Gerais. Amostras do suco ruminal de 36 novilhos mestiços Nelore foram coletadas diretamente do rúmen, após o abate, durante o inicio, meio ou fim do período de estiagem...

  16. Desenvolvimento do trato digestivo de bezerros leiteiros criados em sistema de aleitamento fracionado

    Directory of Open Access Journals (Sweden)

    Rafael A. Azevedo

    2013-07-01

    Full Text Available Para avaliar o efeito do sistema de aleitamento fracionado no desenvolvimento ruminal de bezerros leiteiros holandeses, foram utilizados 12 animais, com peso corporal inicial médio de 37,0 kg, alojados individualmente em baias. O tratamento convencional constituiu-se de quatro litros de leite diários durante 60 dias e o fracionado, de seis litros do 6º ao 25º dia; quatro litros dos dias 26 a 45 e dois litros de 46 a 59 dias de vida, além de concentrado, feno de Cynodon sp., água e suplemento mineral, oferecidos livremente. O consumo dos alimentos foi monitorado diariamente e os animais, pesados semanalmente, após o fornecimento da dieta líquida, pela manhã. Aos 60 dias de vida, os animais foram abatidos e realizaram-se pesagens do trato digestivo e medidas histológicas das papilas ruminais. O sistema de aleitamento não interferiu significativamente no consumo de concentrado, de feno, de matéria seca total e no peso corporal final vazio. O aleitamento fracionado resultou em maior peso corporal final, pesos absolutos do trato digestivo, do ruminorretículo, do omaso e dos intestinos, de pesos relativos do omaso e dos intestinos e maior índice mitótico das papilas ruminais. O sistema de aleitamento fracionado pode ser alternativa para melhorar o desenvolvimento ruminal e o desempenho de bezerros.

  17. ScattAR

    DEFF Research Database (Denmark)

    Baldwin, Alex Dempster; Serafin, Stefania; Erkut, Cumhur

    2017-01-01

    We present an augmented reality (AR) audio application where scattering delay networks efficiently generate and organize a reverberator, based on room geometry scanned by an AR device. The application allows for real-time processing and updating of reflection path geometry. It provides a proof...

  18. Ramon Llull's Ars Magna

    DEFF Research Database (Denmark)

    Jensen, Thessa

    2017-01-01

    might be a viable and valuable approach to understand some of the challenges and possibilities found in computer science and ethics. Vita Llull was born in 1232 in Palma de Mallorca, a melting pot for different cul-tures and religions at the time. Being educated at the king’s court, Llull learned...... of belief, life, and God as such. Computer Science? Llull was an inspiration for later scientists, most notably Giordano Bruno, Athanasius Kirchner, Agrippa of Nettesheim and Gottfried Wilhelm Leibniz, whose dissertation De Arte Combinatoria begins with a discussion of Llull’s Ars Magna. Umberto Eco also......-ple of Mallorca have since tried to have Llull canonised as a saint. Ars Magna A few years before his death Llull began to write the most thorough and final version of his Ars Magna, the Ars Generalis Ultima [3]. The books explain the different figures of the Ars, its principles, questions, descriptions...

  19. MonitAR, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — We propose to develop MonitAR, an Augmented Reality (AR) system that provides procedure completion guidance to astronauts. MonitAR will replace guidance from mission...

  20. Ultrassonografia testicular em bovinos jovens da raça Nelore criados em sistema extensivo

    Directory of Open Access Journals (Sweden)

    D.J. Cardilli

    2012-02-01

    Full Text Available Este estudo visou avaliar o padrão ultrassonográfico do parênquima testicular de touros jovens da raça Nelore, desde a fase peripuberal até a puberdade, estabelecer padrões fisiológicos e também verificar se existe diferença de ecogenicidade entre animais púberes e pré-púberes na mesma idade. Foram realizados exames ecográficos dos testículos de 19 bovinos aos 10, 12, 14, 16 e 18 meses de idade. O padrão ultrassonográfico do parênquima testicular mostrou-se homogêneo e com ecogenicidade moderada. A ecogenicidade testicular aumentou em proporção direta com a idade dos animais. Não houve diferença significativa entre a ecogenicidade testicular de animais púberes e pré-púberes na mesma idade.

  1. Correlação entre a necrose de frutos associada ao Colletotrichum spp. com as características frutos por nó e produtividade entre genótipos de café arábica Correlation between fruit necrosis associated to Colletotrichum spp. with the fruits per node and yield traits of arabic coffee

    Directory of Open Access Journals (Sweden)

    Gustavo Hiroshi Sera

    2008-02-01

    Full Text Available O fungo Colletotrichum spp. vem sendo associado à graves perdas para a cafeicultura brasileira. Objetivou-se neste trabalho verificar a existência de relação entre a variável necrose de frutos associada ao Colletotrichum spp. ("COL" com a quantidade média de frutos por nó produtivo ("FN" e com a produção ("PRD" em genótipos de café arábica. O ensaio de campo foi realizado no IAPAR (Londrina, PR, Brasil em dezembro de 2004 e em cafeeiros com três anos de idade. A variável "COL" foi avaliada atribuindo-se notas de 1 a 5, onde 1 representam plantas com 0 % a 5 % de frutos necrosados. "FN" foi avaliada seguindo uma escala de notas de 1 a 5, onde 1 representa plantas com 0 a 3 frutos/ nó e nota 5 com mais do que 15 frutos/ nó. A avaliação visual subjetiva da produção foi estimada em litros de frutos em estádio cereja, por planta. A correlação de Pearson foi estimada para avaliar a existência de associações entre as variáveis. Foram observadas correlações positivas e significativas a 1 % entre "COL" e "FN" e entre "COL" e "PRD". A necrose de frutos foi mais intensa em cafeeiros com mais produção e com mais frutos por nó produtivo. Sugere-se que a avaliação da resistência de campo à necrose dos frutos associada à presença de Colletotrichum spp. seja realizada em cafeeiros com alta produção e com alta quantidade de frutos por nó produtivo.Different fungi species of genus Colletotrichum has been associated with losses to the Brazilian coffee crop. The aim of this research was to evaluate the association between the variable fruit necrosis associated to Colletotrichum spp. ("COL" with the fruits per productive node average ("FN" and between "COL" and the yield ("PRD" in Coffea arabica L. genotypes. The field assay was evaluated at IAPAR (Londrina, PR, Brazil, in December 2004 and on coffee trees with three years old. The "COL" variable was evaluated attributing scores from 1 to 5, where score 1 represents plants

  2. Exigências nutricionais da grápia ao fósforo e enxofre em Argissolo Vermelho distrófico arênico: efeito da adubação no crescimento Nutritional demand of grápia to phophorus and sulfur in paleaudalf soil: fertilization effects on growth

    Directory of Open Access Journals (Sweden)

    Evandro Luiz Missio

    2004-08-01

    Full Text Available A grápia (Apuleia leiocarpa Vog. Macbride é uma espécie de grande interesse madeireiro, encontrando-se, atualmente, bastante dizimada devido à exploração extrativista, sem haver reposição através de reflorestamento. O objetivo deste trabalho foi determinar os níveis ótimos de adubação de fósforo e enxofre no crescimento de plantas jovens de grápia. As plantas foram cultivadas em vasos contendo 3,5kg de solo Argissolo Vermelho distrófico arênico, sob condições de casa de vegetação não climatizada. O delineamento experimental foi o inteiramente casualizado com seis repetições. Foram avaliados 16 tratamentos em esquema bifatorial completo (4x4, representados pela combinação de quatro doses de P (0, 60, 120 e 180mg kg-1 e quatro de enxofre (0, 10, 20 e 30mg kg-1. A análise do crescimento das plantas foi realizada mensalmente através da altura da planta, diâmetro do caule e número de folhas remanescentes. Aos 130 dias após a emergência das plantas, avaliaram-se ainda o número de folhas caídas, matéria seca das folhas, caule, raízes e total da planta e a relação entre a matéria seca das raízes e da parte aérea. A produção de matéria seca total das plantas jovens de grápia respondeu positivamente à adubação conjunta de P e S, com dose de máxima eficiência técnica estimada de, respectivamente, 204 e 16mg kg-1 de solo. A adubação fosfatada na dose igual ou acima de 120mg kg-1 de solo induziu o aparecimento de clorose foliar típica da deficiência de Fe. A alta disponibilidade de P no solo favoreceu o crescimento da parte aérea em detrimento das raízes.Grápia (Apuleia leiocarpa Vog. Macbride is an important native forest species that has been in extinction process. The aim of this study was to determine the optimum levels of phosphorus and sulfur fertilization on the initial growth of grápia. Grápia plants were cultivated in pots containing 3.5kg of a Paleudalf soil, under unclimatized glasshouse

  3. Simultaneous measurement of the 37Ar and 39Ar activity

    International Nuclear Information System (INIS)

    Fisenko, A.V.

    1978-01-01

    A method for simultaneous measurement of 37 Ar and 39 Ar activities, based on the different radiation penetrabilities of these isotopes is described. Two versions are realized. In the first case, a two-section detector is used whose partition partially transmits 39 Ar β-radiation and fully absorbs 37 Ar Auger electrons. A mixture of 37 Ar and 39 Ar is introduced into an internal counter operating at anticoincidences with an external counter. In the second version, a scintillation detector is used as an external counter, while the 37 Ar- 39 Ar mixture is introduced into a gas counter with a thin cathode. The rated detection efficiency of 37 Ar radiation in both versions is 80%. When measurement duration is 500 h, the sensitivity is approximately 10 -14 and 6x10 -15 Ci for 39 Ar and 37 Ar respectively

  4. Ponderal development and growth traits of Anglonubian goats raised under semi-intensive system Desenvolvimento ponderal e características de crescimento de caprinos da raça Anglonubiana criados em sistema semi-intensivo

    Directory of Open Access Journals (Sweden)

    Milton Rezende Teixeira Neto

    2009-06-01

    Full Text Available The goal of this study was to characterize, by mathematic models, the growth pattern of Anglonubian goats raised under semi-intensive system. Data from 43 males and 33 females were used to estimate the growth of animals based on non-linear models. The effects from sex, birth month and birth type on living weight and on average daily weight gain (DWG at different ages were analyzed. The logistic model has proved to be the most adequate one to estimate the growth curves of males and females. The birth type influenced the living weight up to 60 days of age (P<0.05 and the birth month presented no effects. The sex affected the GPD until 150 days of age and affected the living weight at all ages, with males heavier than females (P<0.05. The DWG was higher at younger ages, being equal to 194 ± 42 g from birth to 30 days and 91 ± 60 g from 210 to 240 days, with about 150 g/day from birth to 150 days of age. Anglonubian goats raised under semi-intensive system show satisfactory performance for meat production and the logistic model is adequate to estimate the growth pattern of the kids from this breed.Objetivou-se avaliar o padrão de crescimento de caprinos da raça Anglonubiana criados sob sistema semi-intensivo. Os dados oriundos de 43 machos e 33 fêmeas foram utilizados para estimar o crescimento dos animais com base em modelos não-lineares, tendo sido analisados os efeitos de sexo, mês e tipo de nascimento, sobre o peso vivo e o ganho de peso diário (GPD em diferentes idades. O modelo Logístico mostrou-se o mais adequado para estimar a curva de crescimento de machos e fêmeas. O tipo de nascimento influenciou o peso vivo até os 60 dias (P<0,05, enquanto que o mês de nascimento não apresentou efeito significativo. O sexo afetou o GPD até 150 dias de idade assim como afetou o peso vivo em todas as idades, sendo os machos mais pesados que as fêmeas (P<0,05. O GPD foi maior em idades mais jovens, sendo igual a 194 ± 42 g do nascimento aos

  5. Identification of excess 40Ar by the 40Ar/39Ar age spectrum technique

    International Nuclear Information System (INIS)

    Lanphere, M.A.; Dalrymple, G.B.

    1976-01-01

    40 Ar/ 39 Ar incremental heating experiments on igneous plagioclase, biotite, and pyroxene that contain known amounts of excess 40 Ar indicate that saddle-shaped age spectra are diagnostic of excess 40 Ar in igneous minerals as well as in igneous rocks. The minima in the age spectra approach but do not reach the crystallization age. Neither the age spectrum diagram nor the 40 Ar/ 36 Ar versus 39 Ar/ 36 Ar isochron diagram reliably reveal the crystallization age in such samples. (Auth.)

  6. Ramon Llull's Ars Magna

    DEFF Research Database (Denmark)

    Jensen, Thessa

    2018-01-01

    The Ars Magna of Ramon Llull must be seen as one of the first attempts to formalise language, thought processes, and creating a basis for rational discussions. It consists of so-called principles, concepts, which are defined and combined through the use of four main figures. Llull's contribution...

  7. Los criados salmantinos durante el siglo XVII (1601-1650: conflictividad social y actitudes ante la muerte

    Directory of Open Access Journals (Sweden)

    Francisco Javier LORENZO PINAR

    2011-03-01

    Full Text Available Normal 0 21 false false false ES X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} A través de la documentación de los protocolos notariales y de los litigios del Archivo Histórico Diocesano, el presente artículo trata de aproximarnos a las situaciones conflictivas en las que se vieron envueltos los criados salmantinos en la primera mitad del siglo XVII (estupros, amancebamientos, pendencias, etc. así como sus actitudes ante la muerte y las relaciones que mantuvieron con sus amos y compañeros de trabajo reflejadas a través de los testamentos.

  8. 40Ar/39Ar studies of deep sea igneous rocks

    International Nuclear Information System (INIS)

    Seidemann, D.

    1978-01-01

    An attempt to date deep-sea igneous rocks reliably was made using the 40 Ar/ 39 Ar dating technique. It was determined that the 40 Ar/ 39 Ar incremental release technique could not be used to eliminate the effects of excess radiogenic 40 Ar in deep-sea basalts. Excess 40 Ar is released throughout the extraction temperature range and cannot be distinguished from 40 Ar generated by in situ 40 K decay. The problem of the reduction of K-Ar dates associated with sea water alteration of deep-sea igneous rocks could not be resolved using the 40 Ar/ 39 Ar technique. Irradiation induced 39 Ar loss and/or redistribution in fine-grained and altered igneous rocks results in age spectra that are artifacts of the experimental procedure and only partly reflect the geologic history of the sample. Therefore, caution must be used in attributing significance to age spectra of fine grained and altered deep-sea igneous rocks. Effects of 39 Ar recoil are not important for either medium-grained (or coarser) deep-sea rocks or glasses because only a small fraction of the 39 Ar recoils to channels of easy diffusion, such as intergranular boundaries or cracks, during the irradiation. (author)

  9. Influência da temperatura e velocidade do ar na secagem de manjericão (Ocimum basilicum L. com relação aos teores de óleos essenciais e de linalol Influence of drying temperature and air velocity related to essential oil and linalol contents of the basil (Ocimum basilicum L.

    Directory of Open Access Journals (Sweden)

    Rilvaynia Dantas Soares

    2007-08-01

    Full Text Available Neste trabalho, objetivou-se estudar a influência de quatro temperaturas de ar de secagem (40, 50, 60 e 70 ºC, em camada fina, e duas velocidades do ar (0,9 e 1,9 m/s sobre o teor de linalol do manjericão (Ocimum basilicum L. Utilizou-se um secador de bandejas especialmente desenvolvido, no laboratório de Secagem da UESB, Campus de Itapetinga-BA. Foram feitas quatro repetições, com 100 g de folhas frescas em cada uma das cinco bandejas da câmara de secagem. Na extração do óleo essencial, utilizou-se um sistema de destilação por arraste a vapor e a análise do óleo essencial foi realizada em um cromatógrafo conectado a um e espectrômetro de massa (CG-MS. Os maiores rendimentos de óleos essenciais de manjericão foram obtidos no processo de secagem com temperatura do ar igual a 40 ºC e 1,9 m/s de velocidade do ar. Os maiores rendimentos de linalol foram obtidos com temperatura do ar de secagem na faixa de 50 a 60 ºC e 1,9 m/s de velocidade do ar (2,23 e 2,47 ppm, respectivamente. Por análise de regressão, estimou-se que a temperatura de 54,4 ºC e a velocidade de 1,9 m/s forneceriam o maior rendimento de linalol. Concluiu-se que a composição química do óleo essencial do manjericão é afetada tanto pela temperatura como pela velocidade do ar de secagem.This work aimed to study the influence of four thin layer drying temperatures (40, 50, 60 and 70 ºC and two air velocities (0.9 and 1.9 m/s in the content of linalol of the Basil (Ocimum basilicum L.. It was used a tray dryer specially built for this experiment in the drying laboratory of the UESB at the "Campus de Itapetinga-Ba". There were made four repetitions with 100 g of fresh leaves in each one of the five trays in the dry chamber In the extraction of the essential oil, a vapor hauling system was used and the oil analysis was made in a gas chromatographer that was connected to a mass spectrometer (CG-MS. The greatest extracted profits of basil's essential oil were

  10. Influences of atom Ar on Ar at C60 + Ar at C60 collisions

    International Nuclear Information System (INIS)

    Zhao Qiang; Zhou Hongyu; Zhang Fengshou

    2007-01-01

    A semi-emperical molecular dynamics model was developed. The central collisions of C 60 + C 60 and Ar at C 60 + Ar at C 60 at the same incident energy were investigated within this model. The fullerene dimers could be formed by a self-assembly of C 60 fullerene, and the new fullerene structure like 'peanut' could be formed by a self-assembly of Ar at C 60 . It was found that atom Ar had a great effect on the collision of Ar at C 60 + Ar at C 60 . (authors)

  11. Ars Electronica tulekul / Rael Artel

    Index Scriptorium Estoniae

    Artel, Rael, 1980-

    2003-01-01

    6.-11. IX toimub Austrias Linzis "Ars Electronica" festival, mille teema on "Code - The Language of Our Time". Festivali kavast, osalejatest, ava-performance'ist "Europe - A Symphonic Vision", näitusest "Cyberarts 2003. Prix Ars Electronica"

  12. DA PSICODINÂMICA DO TRABALHO AO DIREITO FUNDAMENTAL AO CONTEÚDO DO PRÓPRIO TRABALHO E AO MEIO AMBIENTE ORGANIZACIONAL SAUDÁVEL

    Directory of Open Access Journals (Sweden)

    Leonardo Vieira Wandelli

    2015-10-01

    Full Text Available O presente artigo procura traçar alguns elementos que pretendem articular como, a partir do discurso jurídico, podem ser significados os aportes sobre saúde e trabalho, especialmente aqueles trazidos pela abordagem da Psicodinâmica do Trabalho. Um caminho, assim, que vai dos estudos sobre sujeito, trabalho e saúde até o Direito Constitucional, que afirma como seu fundamento a dignidade humana, indissociável da centralidade antropológica do trabalho; um vínculo expressado pelo direito fundamental ao trabalho que, aqui, se propõe reconstruir a partir do desvelamento de um direito fundamental ao conteúdo do próprio trabalho, articulado ao conceito de meio ambiente organizacional do trabalho. 

  13. ARABIC LIGHT STEMMER (ARS

    Directory of Open Access Journals (Sweden)

    ASMA AL-OMARI

    2014-12-01

    Full Text Available Stemming is a main step used to process textual data. It is usually used in several types of applications such as: text mining, information retrieval (IR, and natural language processing (NLP. A major task in stemming is to standardize words; which can be achieved by reducing each word to its base (root or stem. Arabic stemming is not an easy task. Unlike other languages, Arabic language is a highly inflected language, since it uses many inflectional forms. Researchers are divided on the benefit of using stemming in fields of IR, NLP...etc., since in Arabic the morphological variants of a certain word are not always semantically related. The aim of this paper is to design and implement a new Arabic light stemmer (ARS which is not based on Arabic root patterns. Instead, it depends on well defined mathematical rules and several relations between letters. A series of tests were conducted on ARS stemmer to compare its effectiveness with the effectiveness of two other Arabic stemmers. Test shows clearly the effectiveness superiority of ARS compared to effectiveness of these two Arabic stemmers.

  14. Temperature and pressure effects on 40Ar-39Ar systematics

    International Nuclear Information System (INIS)

    Ozima, M.; Kaneoka, I.; Yanagisawa, M.

    1979-01-01

    The effects of thermal and compressional treatment on 40 Ar- 39 Ar systematics have been investigated on three artificially heated biotite samples (heated for 1 hour at 700 0 C and 860 0 C in air and 700 0 C in vacuum respectively) and uniaxially compressed granite (p=1400 bar) and basalt samples (p=1660 bar). The 40 Ar- 39 Ar results for the disturbed samples are compared with those for undisturbed samples. Except for the vacuum-heating case, the effects of the disturbances may be interpreted as the combined effect of a partial loss of radiogenic 40 Ar from the sample and an incorporation of air Ar into the sample. Common diagnostic effects are (1) reduction of the total fusion age, (2) distortion of the age spectrum and, if the degree of the partial Ar loss is small (3) approximate preservation of the isochron age, and (4) reduction of the intercept value ( 40 Ar/ 36 Ar) in the isochron plot. The features observed in the age spectra of artificially disturbed samples are rather common in geologically disturbed samples, suggesting that the artificial disturbances simulate the effects of geological disturbances on 40 Ar- 39 Ar systematics. (Auth.)

  15. Sensibilidade da rosa 'Osiana' ao etileno

    Directory of Open Access Journals (Sweden)

    Delaine Cristina Cordeiro

    2011-01-01

    Full Text Available Os objetivos deste trabalho foram determinar a sensibilidade e as respostas da rosa cultivar Osiana (Rosa × hybrida à presença de etileno ao longo da vida pós-colheita. Para determinar a sensibilidade da flor ao etileno, hastes foram cortadas e colocadas em câmaras herméticas e em seguida tratadas por 24 horas com diferentes concentrações de etileno variando de 0,0; 0,1; 1,0; 10; 100 e 1000 µL L-1do ar no interior da câmara. A rosa teve a vida pós-colheita reduzida pelo etileno, quando exposta a concentração igual ou superior a 10 µL L-1 de etileno. As flores tratadas com no mínimo de 10 µL L-1de etileno desenvolveram necrose, murcha e abscisão prematura das pétalas ainda túrgidas. As concentrações de 0,1 e 1,0 µL L-1de etileno estimularam a abertura do botão floral durante o período de 24 horas de exposição ao etileno, sem no entanto, reduzir a vida pós-colheita. A rosa 'Osiana' pode ser classificada como uma cultivar sensível ao etileno e a concentração influência os processos estimulados.

  16. Detecção de anticorpos anti-Toxoplasma gondii em suínos criados e abatidos no Estado da Bahia, Brasil Detection anti-Toxoplasma gondii antibodies in swines bred and abated in the Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    Rodrigo A. Bezerra

    2009-09-01

    Full Text Available Objetivou-se verificar a ocorrência de anticorpos anti-Toxoplasma gondii em suínos criados e abatidos no Estado da Bahia. Foram coletadas e examinadas 465 amostras de sangue de suínos provenientes de criações de diferentes locais desse estado. Para a pesquisa de anticorpos anti-T. gondii, foi utilizada a técnica de Imunoadsorção Enzimática (ELISA e considerados positivos todos os animais com títulos iguais ou maiores que 1:16. Desses, 18,27% (85/465 foram positivos para anticorpos anti-T. gondii, sendo 30,76% (24/78 em Ilhéus, 18,10% (21/116 em Itabuna e 14,76% (40/271 em Simões Filho. Foram observadas diferenças significativas quanto ao sexo dos animais (p = 0,0171, ao sistema de criação (p = 0,0002 e à procedência dos animais (p = 0,0278 no município de Itabuna. Anticorpos anti-T. gondii foram encontrados nos animais estudados, podendo ser estes animais fonte de infecção para a população humana local.This study was performed to verify the occurrence of anti-Toxoplasma gondii antibodies in swine raised and slaughtered in the state of Bahia, Brazil. Four hundred sixty five swine blood samples from farms of different cities had been collected and examined. Anti-T. gondii antibodies was detected by the enzyme-linked immunosorbent assay (ELISA and considered positive all the animals with equal or bigger headings than 1:16. From these, 18.27% (85/465 of total sample were positive for T. gondii, 30.76% (24 in Ilhéus, 18.10% (21/116 in Itabuna and 14.76% (40/271 in Simões Filho. Significant differences were observed regarding animal sex (p = 0.0171, raising system (p = 0.0002 and origin of the animals (p = 0.0278 in the city of Itabuna. The occurrence of anti-T. gondii antibodies shows that swine can be a source of infection for the local human population.

  17. Behavior, performance and physiological parameters of pigs reared in deep bedding Comportamento, desempenho e parâmetros fisiológicos de suínos criados em cama sobreposta

    Directory of Open Access Journals (Sweden)

    Fabiana R. Caldara

    2012-02-01

    conversão alimentar durante o período. Os sistemas de produção sobre cama proporcionaram maiores valores de ITGU. Não houve efeito dos sistemas avaliados sobre os parâmetros de desempenho. A temperatura retal foi superior nos animais criados sobre cama de casca de café, em relação ao piso de concreto. O uso de camas sobrepostas beneficiou o comportamento de leitões em fase de crescimento e reduziu o comportamento agonístico entre indivíduos.

  18. Spectroanalytical investigations on inductively coupled N2/Ar and Ar/Ar high frequency plasmas

    International Nuclear Information System (INIS)

    Malinowski, P.; Mazurkiewicz, M.; Nickel, H.

    1981-03-01

    In order to improve the detection limits of trace elements in corrosion products of metallic materials, the inductively coupled plasma excitation source (ICP) was applied for spectroscopic analysis. Besides optimizing the working conditions for the mentioned materials, the fundamental research clearing the excitation processes in ICP was carried out. Basicly, two plasma systems were investigated: the nitrogen cooled N 2 /Ar- and pure Ar/Ar-plasma. The computed detection limits for 8 chosen elements are between 0.1 and 50 μg ml -1 in both plasmas. The advantage of ion lines was clearly present; in N 2 /Ar-plasma it was larger than in Ar/Ar-plasma. The excitation temperatures measured with help of ArI, FeI and ZnI lines rise with increasing power and decreasing distance from the induction coil. The distribution of Zn excitation temperature in N 2 /Ar-plasma as well as the measured N + 2 rotational and CN vibrational temperatures indicate, that the toroidal structure of Ar/Ar-plasma is not analogue to the N 2 /Ar-plasma. The values of the various excitation temperatures (Ar, Fe, Zn) and the differences between the excitation, vibration, rotation and ionization temperatures (Tsub(i) > Tsub(n) = Tsub(vib) > Tsub(rot)) indicate an absence of thermal equilibrium in the concerned system. (orig.)

  19. 40Ar/39Ar age calibration against counted annuallayers

    DEFF Research Database (Denmark)

    Storey, Michael; Stecher, Ole

    2008-01-01

    The 40Ar/39Ar method, based on the decay of the naturally occurring radioactive isotope 40K, is capable of producing ages with precision better than ± 0.1 %. However, accuracy is limited to no better than 1 % mainly due to the relatively large uncertainty in the 40K decay constants. One approach...... worth exploring for an improved absolute age basis for the 40Ar/39Ar system is through cross-calibration with counted annual layers (e.g. tree rings, varves and ice cores). North Atlantic Ash Zone (NAAZ) II is found within the dated part of the annual Greenland ice core record. NAAZ II has been...... correlated to the Icelandic peralkaline rhyolitic Thorsmörk ignimbrite. We will present preliminary 40Ar/39Ar results on the age of this eruption...

  20. Emprego de bomba multifásica como unidade geradora de microbolhas de ar em sistema de flotação aplicado ao pré-tratamento de efluente têxtil Multiphase pump as microbubble generator for flotation system applied to pre-treatment of textile wastewater

    Directory of Open Access Journals (Sweden)

    Andre Pioltine

    2011-06-01

    Full Text Available O artigo apresenta os resultados de uma pesquisa desenvolvida com o objetivo de avaliar o desempenho de bomba multifásica (mistura de ar e água aplicada em substituição à câmara de saturação, em sistema de flotação localizado em uma indústria têxtil. Na unidade piloto (taxa de aplicação superficial de clarificação igual a 128,6 ± 10 m.d-1, foi verificado que os melhores resultados em termos de eficiência de remoção de turbidez e cor aparente (eficiência de remoção superior a 95% foram obtidos nos ensaios realizados com razão de recirculação em torno de 30% associada à composição volumétrica de ar de 13%.This paper presents the results of a research carried out that aims to evaluate the performance of a multiphase pump (mixture of air and water applied to replace the saturator chamber in a flotation system located in a textile industry. In the pilot unit (hydraulic surface loading equal to 128.6 ± 10 m.d-1, it was verified that the best results in terms of removal efficiency of turbidity and apparent color (efficiency removal over 95% were obtained for the essays performed with recirculation ratio equal to 30% and air supply of 13%.

  1. Geochronology and thermochronology by the 40Ar/39Ar method

    International Nuclear Information System (INIS)

    McDougall, I.; Harrison, T.M.

    1988-01-01

    This work is a response to the authors' belief that there is a need for a monograph on 40 Ar/ 39 Ar dating to provide concise knowledge concerning the application of this method to geological studies. They aim to provide a reasonably comprehensive but by no means exhaustive coverage of the principles and practices of 40 Ar/ 39 Ar dating, with emphasis on interpretation of results. In attempting to provide an overview of the current state of knowledge, they commonly cite examples from the available literature. They draw rather heavily upon their own work, because they feel comfortable with their own examples. (author)

  2. Uma educação pela natureza: vida ao ar livre e métodos terapêuticos nas colônias de férias infantis do Estado de São Paulo (1940 Education through nature: open-air life and therapeutic methods at summer camps in the state of São Paulo (1940

    Directory of Open Access Journals (Sweden)

    André Dalben

    2011-04-01

    Full Text Available A montanha e o litoral afirmam-se no imaginário urbano paulista da década de 1940 como propícios locais para a instalação de colônias de férias infantis. O clima, a altitude, a água e o sol, são elementos naturais próprios dessas localidades, considerados cientificamente como instrumentos capazes de revigorar as fragilidades orgânicas das crianças que tiveram a sua saúde deteriorada pelos agitados ritmos e artifícios oriundos da vida urbana. Organizam-se, assim, nessas instituições extraescolares, procedimentos médico-educativos para as férias infantis, transformando-as em tempo destinado à educação e ao fortalecimento do corpo. O artigo tem por objetivo estudar essa educação do corpo realizada nas colônias de férias infantis que, ao privilegiar a natureza e seus elementos, afirma e desenha comportamentos e formas de uma vida higiênica para a cidade e seus moradores.The mountains and the coast are present in the urban imaginary of São Paulo State in the 1940's as appropriate spots for summer camps. The climate, the altitude, the water and the sun are natural elements at these places, scientifically considered as instruments able to restore organic frailties of children who have their health spoiled by the disturbing pace and stratagems of their urban lifestyle. Therefore, educational and medical procedures are organized at these school holiday institutions, turning them into time dedicated to educate and strengthen the body. This article aims to study this education of the body performed in summer camps that, by privileging nature and its elements, reinforces and draws behaviors and manners of a hygienic lifestyle for the city and its dwellers.

  3. Geological Dating by 40 Ar - 39 Ar method

    International Nuclear Information System (INIS)

    Vollbert Romero, M.E.

    1992-01-01

    The isotope 40 K is radioactive, it decays to 40 Ar stable. The number of 40 Ar atoms produced from 40 K, permits to calculate the date of rocks and minerals. This dating technique is named 'Conventional K-Ar Dating Method'. The 40 Ar - 39 Ar dating method permits to calculate the age of rocks and minerals eliminating the limitation of the K-Ar method by calculating potassium and argon concentrations in a single measurement of the ratio of argon isotopes. In this work, the irradiation of the sample with fast neutrons in the nuclear reactor was established. 39 Ar is obtained from the induced reaction 39 K (n,p) 39 Ar. Thus the ration of 40 Ar - 39 Ar allows to obtain the date of rocks and minerals. This ratio was measured in a mass spectrometer. If the measurement of argon concentration in the sample is carried out at different increasing temperature values, it is possible to get information of paleotemperatures. The number of atoms 39 Ar is a function of the number 39 K atoms, irradiation time, neutrons flux, its energy E and the capture cross section σ of 39 K. These parameters are calculate indirectly by obtaining the so called 'J value ' by using a standard mineral with known age (HD-BI y Biot-133), this mineral is irradiated together with the unknown age sample. The values of 'J' obtained are in the interval of 2.85 a 3.03 (x 10 - 3)J/h. Rocks from 'Tres Virgenes' were dated by the method described in this work, showing an agreement with previous values of different authors. The age of this rocks are from Cenozoico era, mainly in the miocene period. (Author)

  4. 40Ar/39Ar geochronology of terrestrial pyroxene

    Science.gov (United States)

    Ware, Bryant; Jourdan, Fred

    2018-06-01

    Geochronological techniques such as U/Pb in zircon and baddeleyite and 40Ar/39Ar on a vast range of minerals, including sanidine, plagioclase, and biotite, provide means to date an array of different geologic processes. Many of these minerals, however, are not always present in a given rock, or can be altered by secondary processes (e.g. plagioclase in mafic rocks) limiting our ability to derive an isotopic age. Pyroxene is a primary rock forming mineral for both mafic and ultramafic rocks and is resistant to alteration process but attempts to date this phase with 40Ar/39Ar has been met with little success so far. In this study, we analyzed pyroxene crystals from two different Large Igneous Provinces using a multi-collector noble gas mass spectrometer (ARGUS VI) since those machines have been shown to significantly improve analytical precision compared to the previous single-collector instruments. We obtain geologically meaningful and relatively precise 40Ar/39Ar plateau ages ranging from 184.6 ± 3.9 to 182.4 ± 0.8 Ma (2σ uncertainties of ±1.8-0.4%) and 506.3 ± 3.4 Ma for Tasmanian and Kalkarindji dolerites, respectively. Those data are indistinguishable from new and/or published U-Pb and 40Ar/39Ar plagioclase ages showing that 40Ar/39Ar dating of pyroxene is a suitable geochronological tool. Scrutinizing the analytical results of the pyroxene analyses as well as comparing them to the analytical result from plagioclase of the same samples indicate pure pyroxene was dated. Numerical models of argon diffusion in plagioclase and pyroxene support these observations. However, we found that the viability of 40Ar/39Ar dating approach of pyroxene can be affected by irradiation-induced recoil redistribution between thin pyroxene exsolution lamellae and the main pyroxene crystal, hence requiring careful petrographic observations before analysis. Finally, diffusion modeling show that 40Ar/39Ar of pyroxene can be used as a powerful tool to date the formation age of mafic

  5. Carta ao Leitor

    Directory of Open Access Journals (Sweden)

    Editorial Editorial

    2014-02-01

    Full Text Available ApresentaçãoO Centro de Educação a Distância – CEAD/Unimontes foi inaugurado em 2011 em histórico de ricas experiências vivenciadas pela Universidade Estadual de Montes Claros – Unimontes ao longo de 15 anos.Uma jornada de esforços conjuntos e uma estima apaixonada pela educação e pelo conheci-mento científico carecia, em seu núcleo, de uma plataforma que reunisse todas as perspectivas constitutivas de sua história e finalidade. Um anseio crescente da instituição que se desdobra e desdobrará em produtos e iniciativas de fomento em pesquisa. Em 2012, como fruto gerado di-retamente do âmago dessas necessidades unidas ao cenário nacional de valorização crescente da pesquisa científica, surge a Revista Multitexto.A Revista Multitexto nasce como um periódico em movimento. São contribuições de aborda-gens múltiplas num ensejo genuíno e único de progressão científica em pesquisa. Um marco para os estudos na área de ensino a distância numa oferta interdisciplinar. Unidade na diversidade: a grande proposta da revista. Espaço aberto para pesquisadores e entusiastas. Multipliquem-se os multitextos em contribuições múltiplas.Sobre a Revista MultitextoPublicação semestral do Centro de Educação a Distância da Universidade Estadual de Montes Claros – CEAD/Unimontes, que contribui na área de conhecimento produzida pelas fenomenologias e áreas correlatas em Educação a Distância, com foco interdisciplinar. Aberta em 2012, a Revista Multitexto recebe colaborações de pesquisadores em ensino a dis-tância e demais áreas. É meta referencial da revista abordar questões conceituais e metodológicas, bem como, os desenvolvimentos da pesquisa, aplicada ou teórica, na área de educação à distância (EAD; difundir a produção científica de pesquisadores da área de educação à distância (EAD, inseridos em Institutos de pesquisa e de educação superior no Brasil; propiciar um espaço para o

  6. agradecimento aos consultores ad hoc

    Directory of Open Access Journals (Sweden)

    REA Editor

    2012-02-01

    Full Text Available Agradecemos aos professores Nildo Viana (UFG e Flavio Sofiati (UFG, organizadores do DOSSIÊ JUVENTUDE & SOCIEDADE, e aos Consultores Ad hoc pela leitura e apreciação crítica dos artigos submetidos e publicados nesta edição.

  7. Criação intensiva de suínos em confinamento ou ao ar livre: estudo meta-analítico do desempenho zootécnico nas fases de crescimento e terminação e avaliação de carcaça e carne no Longissimus dorsi Intensive pig production in confinement or outdoor systems: a meta-analytical study of the production performance in the growing and finishing phases and carcass and meat evaluation from the Longissimus dorsi

    Directory of Open Access Journals (Sweden)

    Alice Bogoni Demori

    2012-07-01

    Full Text Available Uma meta-análise foi realizada para avaliar o desempenho e a qualidade de carcaça e carne de suínos em função do sistema de alojamento nas fases de crescimento/terminação. Foram selecionadas publicações indexadas com resultados de experimentos comparando variáveis de desempenho e de pós-abate de suínos alojados em sistemas intensivos convencionais ou ao ar livre. A base de dados contemplou 27 artigos publicados entre 1997 e 2009. Ao total, foram considerados 2.985 animais e 701 médias na análise de dados. A meta-análise foi realizada através de duas análises sequenciais: gráfica e de variância-covariância. O sistema de criação de suínos ao ar livre aumentou em 9% (P0,05 pelo sistema de alojamento dos suínos. Concluiu-se que o sistema de criação influencia no desempenho dos suínos, mas não interfere nas características de carcaça e carne estudadas.A meta-analysis was carried out to study performance and characteristics of carcass and meat in pigs in function of housing system during the growing/finishing period. Indexed publications with results of experiments comparing performance and post-slaughter variables of pigs housed in outdoor or conventional intensive systems were selected. In total, 2.985 animals and 701 averages were considered in the data analysis. Meta-analysis followed two sequential analyses: graphic and variance. The outdoor productive system increased in 9% (P0.05 by the housing system. It is concluded that the housing system influences the pig performance, but does not interfere in characteristics of carcass and meat.

  8. Características biológicas de linhagens de Trichogramma pretiosum, criados em ovos de Sitotroga cerealella e Anagasta kuehniella Biological characteristics of Trichogramma pretiosum lineages, reared in Anagasta kuehniella and Sitotroga cerealella eggs

    Directory of Open Access Journals (Sweden)

    Dirceu Pratissoli

    2004-09-01

    Full Text Available Avaliaram-se as características biológicas de cinco linhagens de T. pretiosum Riley (Hym.:Trichogrammatidae, coletadas em plantios comerciais de tomate, e criados em ovos de A. kuehniella (Zeller e S. cerealella (Olivier. A taxa de parasitismo das cinco linhagens variou de 56,1 a 68,6%, quando o hospedeiro foi A. kuehniella, sendo superior à do hospedeiro S. cerealella. A viabilidade de todas as linhagens, quando criadas em ovos de S. cerealella, foi superior a 90%; no entanto, somente nas linhagens provenientes de Afonso Cláudio e Venda Nova do Imigrante é que a viabilidade das linhagens de Trichogramma criadas em ovos de S. cerealella, foram significativamente maiores que as criadas sobre A. kuehniella. A longevidade dos descendentes submetidos ao parasitismo foi superior para todas as linhagens quando criadas em ovos de A. kuehniella. Ambos os hospedeiros podem ser empregados na criação massal das cinco linhagens estudadas. Contudo, tomando-se por base a taxa de parasitismo e a qualidade da progênie, o hospedeiro A. kuehniella demonstrou ser superior a S. cerealella.The biological characteristics of five lineages of T. pretiosum Riley (Hym.: Trichogrammatidae, collected from tomato crops, and reared in A. kuehniella (Zeller and S. cerealella (Olivier eggs were evaluated. The parasitism rate of the lineages, varied from 56,1 to 68.6%, when the host was A. kuehniella, being higher than for S. cerealella. The viability of all lineages, when reared in S. cerealella eggs, was superior to 90%; however, only those lineages reared in S. cerealella eggs and collected in Afonso Cláudio and Venda Nova dos Imigrantes (Espirito Santo State, Brazil were significantly higher than those reared on A. kuehniella. The longevity of the offspring submitted to the parasitism, was higher in all the lineages reared in A. kuehniella eggs. All five lineages can be mass reared using both hosts. However, considering the parasitism rate and the quality of the

  9. Parâmetros genéticos para coelhos da raça Califórnia criados no Brasil Genetic parameters for Californian rabbits raised in Brazil

    Directory of Open Access Journals (Sweden)

    M.G. Paula

    2000-10-01

    Full Text Available Registros de pesos de 3.249 coelhos, nascidos de 1980 a 1996 e, dados de pedigree de 4.857 coelhos da raça Califórnia, criados no Campus da USP de Pirassununga, São Paulo, submetidos à seleção por três gerações, com base em valores genéticos de pesos à desmama (PD e à 10ª semana de idade (P10 e ganho de peso da desmama até 10 semanas de idade (GPD10, foram analisados pelo método de modelos mistos sob modelos animais para obter estimativas de parâmetros genéticos para as características consideradas como parte do critério de seleção. As estimativas do coeficiente de herdabilidade encontradas foram de 0,23 para PD, de 0,44 para P10 e 0,39 para GP10, mostrando ser possível haver ganhos genéticos se aplicados processos seletivos. A correlação genética entre PD e P10 foi de 0,66 e entre PD e GPD10 foi baixa, indicando que as variáveis são praticamente independentes. A proporção da variância fenotípica devida aos efeitos permanentes de ninhada foi importante para todas as características. Os resultados sugerem que a seleção para características ponderais pode ser eficiente.Genetic, phenotypic and environmental parameters of a population of Californian rabbits submitted to selection for three generations were studied. Traits analyzed were individual weaning weight (PD, weight at 10 weeks (P10 and average daily gain from weaning to 10 weeks of age (GPD10 using 3,249 records of weights of rabbits and pedigree information of 4,857 animals, born from 1980 to 1996, and selected based on an index of estimated breeding values for PD, P10 and GPD10. Permanent effects of litters were as important as additive genetic effects. Heritabilities for the three traits were .23 (PD, .44 (P10 and .39 (GPD10. Genetic correlations between PD and P10 and between PD and GPD10 were high (.66 and very low, respectively.

  10. Prevalência de anticorpos antivírus da arterite dos eqüinos em cavalos criados no Estado de São Paulo

    OpenAIRE

    Lara, M.C.C.S.H.; Fernandes, W.R.; Timoney, P.J.; Birgel, E.H.

    2002-01-01

    Utilizou-se a prova de soroneutralização em microplacas para detecção de anticorpos antivírus da arterite dos eqüinos em 659 amostras de soro sangüíneo de animais criados no Estado de São Paulo. A prevalência de anticorpos na população estudada foi igual a 18,2%. A raça Mangalarga foi a que apresentou maior taxa de prevalência, 33,3%. Animais na faixa etária de 6 a 24 meses de idade apresentaram a maior taxa de prevalência, 30,4%, e as fêmeas apresentaram prevalência de 22, 9%, mais alta do q...

  11. Polimorfismo da hemoglobina de bubalinos (Bubalis bubalis) da raça Murrah criados no Estado de São Paulo, Brasil

    OpenAIRE

    Ayres, Maria Consuêlo Caribé; Birgel Júnior, Eduardo Harry; Rosenfeld, A. M. F.; Birgel, Eduardo Harry

    2005-01-01

    p. 18-23 Os tipos de hemoglobina foram determinados em 41 amostras de sangue de bubalinos sadios da raça Murrah, criados no município de Roseira, no Estado de São Paulo, sendo cinco animais machos e 36 fêmeas. As amostras sangüíneas foram colhidas por venipunção da jugular, em tubos contendo EDTA e a determinação dos tipos de hemoglobina foi realizada pela técnica de eletroforese alcalina em acetato de celulose, utilizando-se o Tris-EDTA-Borato (pH 8,6) como solução tampão. Duas bandas de ...

  12. Polimorfismo da hemoglobina de bubalinos (Bubalis bubalis) da raça Murrah criados no Estado de São Paulo, Brasil

    OpenAIRE

    A. M. F. Rosenfeld; E. H. Birgel Júnior; M. C. C. Ayres; E. H. Birgel

    2006-01-01

    Os tipos de hemoglobina foram determinados em 41 amostras de sangue de bubalinos sadios da raça Murrah, criados no município de Roseira, no Estado de São Paulo, sendo cinco animais machos e 36 fêmeas. As amostras sangüíneas foram colhidas por venipunção da jugular, em tubos contendo EDTA e a determinação dos tipos de hemoglobina foi realizada pela técnica de eletroforese alcalina em acetato de celulose, utilizando-se o Tris-EDTA-Borato (pH 8,6) como solução tampão. Duas bandas de migração rel...

  13. ARS-Media for excel instruction manual

    Science.gov (United States)

    ARS-Media for Excel Instruction Manual is the instruction manual that explains how to use the Excel spreadsheet ARS-Media for Excel application. ARS-Media for Excel Instruction Manual is provided as a pdf file....

  14. Electron scattering from 36Ar and 40Ar

    International Nuclear Information System (INIS)

    Finn, J.M.

    1975-01-01

    The argon isotopes, 36 Ar and 40 Ar, have been investigated using electron scattering at the high-resolution Linac facilities of the National Bureau of Standards. Both elastic scattering and scattering to low-lying states have been observed. A high-pressure, low-volume gas target cell was designed and developed for this experiment. The cell features a transmission geometry and has resolution comparable to solid targets. Spectra were obtained at incident beam energies ranging from 65 to 115 MeV at scattering angles of 92.5 0 and 110 0 . Values obtained for the rms charge radii are 3.327 +- 0.015 and 3.393 +- 0.015 fm for 36 Ar and 40 Ar respectively. A sensitive measurement was made of the difference in the two radii yielding a value of Δ r = 0.079 +- 0.006 fm. The inelastic levels observed are the 1.97 (2 + ) and 4.18 MeV (3 - ) levels in 36 Ar, and the 1.46 (2 + ), 2.52 (2 + ), 3.21 (2 + ), and 3.68 MeV (3 - ) levels in 40 Ar. A Tassie model analysis was made of the inelastic transitions in the DWBA approximation and transition strengths of these levels were extracted

  15. The ArDM experiment

    CERN Document Server

    Haranczyk, M; Badertscher, A; Boccone, V; Bourgeois, N; Bueno, A; Carmona-Benitez, M C; Chorowski, M; Creus, W; Curioni, A; Daw, E; Degunda, U; Dell'Antone, A; Droge, M; Epprecht, L; Haller, C; Horikawa, S; Kaufmann, L; Kisiel, J; Knecht, L; Laffranchi, M; Lagoda, J; Lazzaro, C; Lightfoot, P; Lozano, J; Lussi, D; Maire, G; Mania, S; Marchionni, A; Mavrokoridis, K; Melgarejo, A; Mijakowski, P; Natterer, G; Navas-Concha, S; Otiougova, P; Piotrowska, A; Polinski, J; de Prado, M; Przewlocki, P; Ravat, S; Regenfus, C; Resnati, F; Robinson, M; Rochet, J; Romero, L; Rondio, E; Rubbia, A; Scotto-Lavina, L; Spooner, N; Viant, T; Trawinski, A; Ulbricht, J; Zalewska, A

    2010-01-01

    The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing radiation using two independent readout systems. This paper briefly describes the detector concept and presents preliminary results from the ArDM R&D program, including a 3 l prototype developed to test the charge readout system.

  16. Histologia, histoquímica e histometria do intestino de jacaré-do-Pantanal criado em cativeiro

    Directory of Open Access Journals (Sweden)

    Victor M. Aleixo

    2011-12-01

    Full Text Available A criação de jacaré-do-Pantanal tem se consolidado no estado de Mato Grosso como atividade alternativa e legal para as propriedades rurais na área de ocorrência natural da espécie, coibindo a caça predatória e colaborando na preservação da espécie. A racionalização do processo produtivo na criação de jacaré é uma ação relativamente nova, que permite obter pele de melhor qualidade e de utilização integral, diferentemente daquelas oriundas de animais da natureza. Considerando a importância dos intestinos como sede dos principais eventos relacionados à obtenção de nutrientes para o metabolismo corpóreo, este trabalho teve por objetivo caracterizar qualitativa e quantitativamente a mucosa dos intestinos delgado e grosso de jacaré-do-Pantanal jovens. Para a caracterização ao microscópio óptico da estrutura da parede intestinal e da histometria da mucosa foram coletadas amostras intestinais de 16 animais, sendo três deles também destinados ao estudo histoquímico. As amostras foram obtidas de cinco regiões, sendo quatro do intestino delgado e uma do intestino grosso. Elas foram fixadas em solução de Bouin, processadas de acordo com técnicas preconizadas para inclusão em parafina. Cortes histológicos semi-seriados (quatro micrômetros foram obtidos e o material foi desparafinizado, hidratado e corado pela hematoxilina-eosina para a descrição geral e estudo histométrico, que consistiu da mensuração da freqüência das vilosidades intestinais; dos comprimentos do epitélio e da lâmina própria da mucosa e da espessura da mucosa. Na análise estatística foi empregada a análise de variância e Teste de Tukey. Para o estudo histoquímico foram utilizadas a reação ao ácido periódico de Schiff, alcian blue pH 1,0 contrastado com hematoxilina e alcian blue pH 2,5 conjugado ao ácido periódico de Schiff. Para a descrição das estruturas histológicas foi empregada a terminologia disponível na Nomina

  17. Tipos de miosinas de linhagens de frangos de corte criados em sistemas de confinamento e semiconfinamento Types of myosin of chickens of different strains reared in confinement and semi-confinement systems

    Directory of Open Access Journals (Sweden)

    Luciene Aparecida Madeira

    2011-09-01

    Full Text Available O objetivo neste trabalho foi avaliar o peso vivo, o peso de pernas, os aspectos morfológicos das fibras musculares do músculo flexor longo do hálux e o perfil eletroforético das miosinas de cadeia pesada de quatro linhagens de frangos de corte criados nos sistemas de confinamento e semiconfinamento. Foram utilizados 1.440 pintos distribuídos em delineamento inteiramente casualisado em esquema fatorial 4 × 2, composto de quatro linhagens (Ross 305, Máster Gris, Label Rouge e Vermelhão Pesado e dois sistemas de criação (confinamento e semiconfinamento, cada combinação avaliada com quatro repetições. Aos 28 e 84 dias de idade, foram abatidas quatro aves por tratamento, totalizando 64 aves. A eletroforese identificou a presença das três isoformas de miosinas, tipo MyHC-I, MyHC-IIa e MyHC-IIb, no músculo flexor longo do hálux dos frangos de corte. Com aumento da idade, a isoforma de miosina MyHC-II aumenta, enquanto a MyHC-I diminui. Somente aos 84 dias de idade, a expressão das isoformas de miosina do tipo MyHC-II foram influenciadas pela linhagem, confirmando o reflexo da seleção na linhagem Ross no músculo mais glicolítico.A linhagem Ross apresenta maior peso vivo, peso de perna, peso e área do músculo flexor longo do hálux em comparação às linhagens tipo caipira.The objective was to evaluate body weight, leg weight and morphologic aspects of the muscle fibers of the flexor hallucis longus muscle and electrophoretic profile of myosin heavy chain of four strains of broilers, reared in confinement and semi-confinement systems. 1440 chicks were randomly assigned in a 4 × 2 factorial arrangement: four strains (Ross 305, Master Gris, Label Rouge and Vermelhao Pesado, two production systems (confinement and semi-confinement, with four replicates for each treatment. Four birds were sacrificed for each treatment, at 28 and 84 d, totaling 64 animals. Electrophoresis technique identified the presence of three myosin heavy

  18. Reevaluation of the Solar Wind 36Ar/38Ar Ratio

    Science.gov (United States)

    Becker, R. H.; Schlutter, D. J.; Rider, P. E.; Pepin, R. O.

    1996-03-01

    The isotopic composition of solar wind (SW) argon is an important parameter in the modeling of the evolution of the terrestrial planet atmospheres. Anders and Grevesse assumed a 36Ar/38Ar ratio for SW of 5.31, essentially equal to that of air. Considerable evidence has since developed which indicates that this ratio is too low. Benkert et al. have reported their best estimate for the recent SW as 5.48 +/- 0.05, determined from measurements of lunar soil 71501. Based on Ar data obtained from surface oxidation of a metal separate from the Weston meteorite and from an uncontrolled etch of lunar sample 67701, reported by our group previously, we consider even this value to be too low. Since values of 5.75 to 5.85 were reported by Black for initial low temperature (fairly high SW 36Ar/38Ar ratio (in the range of ~5.6 to ~5.7), we decided to analyze Kapoeta for its light solar wind gases using the acid-etching techniques developed in our laboratory based on the CSSE procedure of Benkert et al.

  19. 40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration

    Directory of Open Access Journals (Sweden)

    PAULO M. VASCONCELOS

    2002-06-01

    Full Text Available Laser heating 40Ar/39Ar geochronology provides high analytical precision and accuracy, mum-scale spatial resolution, and statistically significant data sets for the study of geological and planetary processes. A newly commissioned 40Ar/39Ar laboratory at CPGeo/USP, São Paulo, Brazil, equips the Brazilian scientific community with a new powerful tool applicable to the study of geological and cosmochemical processes. Detailed information about laboratory layout, environmental conditions, and instrumentation provides the necessary parameters for the evaluation of the CPGeo/USP 40Ar/39Ar suitability to a diverse range of applications. Details about analytical procedures, including mineral separation, irradiation at the IPEN/CNEN reactor at USP, and mass spectrometric analysis enable potential researchers to design the necessary sampling and sample preparation program suitable to the objectives of their study. Finally, the results of calibration tests using Ca and K salts and glasses, international mineral standards, and in-house mineral standards show that the accuracy and precision obtained at the 40Ar/39Ar laboratory at CPGeo/USP are comparable to results obtained in the most respected laboratories internationally. The extensive calibration and standardization procedures undertaken ensure that the results of analytical studies carried out in our laboratories will gain immediate international credibility, enabling Brazilian students and scientists to conduct forefront research in earth and planetary sciences.A geocronologia de 40Ar/39Ar por aquecimento a laser permite alta precisão e acurácia analítica, tem resolução espacial em escala micrométrica, e fornece um número de dados estatisticamente significantes para o estudo de processos geológicos e planetários. Um recém construído laboratório de 40Ar/39Ar no CPGeo/USP, São Paulo, Brazil, mune a sociedade científica brasileira com uma técnica eficaz aplicável aos estudos geol

  20. Ar-Ar dating techniques for terrestrial meteorite impacts

    Science.gov (United States)

    Kelley, S. P.

    2003-04-01

    The ages of the largest (>100 km) known impacts on Earth are now well characterised. However the ages of many intermediate sized craters (20-100 km) are still poorly known, often the only constraints are stratigraphic - the difference between the target rock age and the age of crater filling sediments. The largest impacts result in significant melt bodies which cool to form igneous rocks and can be dated using conventional radiometric techniques. Smaller impacts give rise to thin bands of melted rock or melt clasts intimately mixed with country rock clasts in breccia deposits, and present much more of a challenge to dating. The Ar-Ar dating technique can address a wide variety of complex and heterogeneous samples associated with meteorite impacts and obtain reasonable ages. Ar-Ar results will be presented from a series of terrestrial meteorite impact craters including Boltysh (65.17±0.64 Ma, Strangways (646±42 Ma), and St Martin (220±32 Ma) and a Late Triassic spherule bed, possibly representing distal deposits from Manicouagan (214±1 Ma) crater. Samples from the Boltysh and Strangways craters demonstrate the importance of rapid cooling upon the retention of old ages in glassy impact rocks. A Late Triassic spherule bed in SW England is cemented by both carbonate and K-feldspar cements allowing Ar-Ar dating of fine grained cement to place a mimimum age upon the age of the associated impact. An age of 214.7±2.5 Ma places the deposit with errors of the age of the Manicouagan impact, raising the possibility that it may represent a distal deposit (the deposit lay around 2000 km away from the site of the Manicouagan crater during the Late Triassic). Finally the limits of the technique will be demonstrated using an attempt to date melt rocks from the St Martin Crater in Canada.

  1. Feldspar 40Ar/39Ar dating of ICDP PALEOVAN cores

    Science.gov (United States)

    Engelhardt, Jonathan Franz; Sudo, Masafumi; Stockhecke, Mona; Oberhänsli, Roland

    2017-11-01

    Volcaniclastic fall deposits in ICDP drilling cores from Lake Van, Turkey, contain sodium-rich sanidine and calcium-rich anorthoclase, which both comprise a variety of textural zoning and inclusions. An age model records the lake's history and is based on climate-stratigraphic correlations, tephrostratigraphy, paleomagnetics, and earlier 40Ar/39Ar analyses (Stockhecke et al., 2014b). Results from total fusion and stepwise heating 40Ar/39Ar analyses presented in this study allow for the comparison of radiometric constraints from texturally diversified feldspar and the multi-proxy lacustrine age model and vice versa. This study has investigated several grain-size fractions of feldspar from 13 volcaniclastic units. The feldspars show textural features that are visible in cathodoluminescence (CL) or back-scattered electron (BSE) images and can be subdivided into three dominant zoning-types: (1) compositional zoning, (2) round pseudo-oscillatory zoning and (3) resorbed and patchy zoning (Ginibre et al., 2004). Round pseudo-oscillatory zoning records a sensitive alternation of Fe and Ca that also reflects resorption processes. This is only visible in CL images. Compositional zoning reflects anticorrelated anorthite and orthoclase contents and is visible in BSE. Eleven inverse isochron ages from total fusion and three from stepwise heating analyses fit the age model. Four experiments resulted in older inverse isochron ages that do not concur with the model within 2σ uncertainties and that deviate from 1 ka to 17 ka minimum. C- and R-type zoning are interpreted as representing growth in magma chamber cupolas, as wall mushes, or in narrow conduits. Persistent compositions of PO-type crystals and abundant surfaces recording dissolution features correspond to formation within a magma chamber. C-type zoning and R-type zoning have revealed an irregular incorporation of melt and fluid inclusions. These two types of zoning in feldspar are interpreted as preferentially

  2. Analysis list: Ar [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Ar Gonad,Kidney,Prostate + mm9 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/targe...t/Ar.1.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/target/Ar.5.tsv http://dbarchive.biosciencedbc.jp/...kyushu-u/mm9/target/Ar.10.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/colo/Ar.Gonad.tsv,http://dbarchive.bioscience...dbc.jp/kyushu-u/mm9/colo/Ar.Kidney.tsv,http://dbarchive.bioscienced...bc.jp/kyushu-u/mm9/colo/Ar.Prostate.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/colo/Gonad.gml,http://dbarchive.bioscience

  3. Alignment and orientation of Ar+ in He+-Ar collisions

    International Nuclear Information System (INIS)

    Moudry, B.W.; Yenen, O.; Jaecks, D.H.

    1994-01-01

    We have measured the alignment and orientation parameters of the 2 F 7/2 0 and 2 F 5/2 0 states of Ar + formed in the two-electron process; He + +Ar→He(1s 2 )+Ar + (3p 4 4p'). These have been measured at a collision energy of 0.25 keV/amu and for scattering angles ranging from 0.94 to 3.75 . First, by comparing the orientation prameter for the Ar + [(3p 4 [ 1 D]4p' 2 F 7/2 0 ] and the Ar + [(3p 4 [ 1 D]4p' 2 F 5/2 0 ] states, we have experimentally determined the importance of the spin-dependent interactions for the present collision system, by testing the Percival-Seaton hypothesis of spin independence. If the Percival-Seaton hypothesis holds for this system, the orientation parameter should be J-independent. Secondly, the magnitude of the orientation prameter can be interpreted as resulting from the collective circulation of the unexcited 3p 4 electrons and the excited 4p electron. The direction of this collective circulation is compared to the propensity rule for colliding di-atom systems. (orig.)

  4. Ar-39/Ar-40 systematics of Allende inclusions

    International Nuclear Information System (INIS)

    Herzog, G.F.; Rutgers University, New Brunswick, NJ); Bence, A.E.

    1980-01-01

    A laser microprobe was used to measure the Ar isotopic contents of individual mineral grains in four neutron-irradiated Allende samples: two coarse-grained Ca-Al-rich inclusions, one fine-grained Ca-Al-rich inclusion, and one sample with matrix and miscellaneous chondrules. The following K-Ar ages (G.y.) were obtained after degassing low Ar retentive sites by preheating the samples for one hour at 675 C: matrix, 3.5 + or - 0.2 three miscellaneous chondrules, 4.4 + or - 0.1, 4.0 + or - 0.1, and 4.4 + or - 0.1 and the fine-grained inclusion, 4.5 + or - 0.2. The minerals in the coarse-grained Ca-Al-rich inclusions have ubiquitous chlorine, less than 10 ppm K and apparent ages ranging upwards from 4.6 G.y. to well over 10 G.y. Possible explanations for these apparent ages are atmospheric contamination, the decay of K-40 prior to the formation of the solar system, and the trapping of radiogenic Ar-40 lost by the matrix

  5. Determination of Ar metastable atom densities in Ar and Ar/H2 inductively coupled low-temperature plasmas

    International Nuclear Information System (INIS)

    Fox-Lyon, N; Knoll, A J; Oehrlein, G S; Franek, J; Demidov, V; Koepke, M; Godyak, V

    2013-01-01

    Ar metastable atoms are important energy carriers and surface interacting species in low-temperature plasmas that are difficult to quantify. Ar metastable atom densities (N Ar,m ) in inductively coupled Ar and Ar/H 2 plasmas were obtained using a model combining electrical probe measurements of electron density (N e ) and temperature (T e ), with analysis of spectrally resolved Ar plasma optical emission based on 3p → 1s optical emission ratios of the 419.8 nm line to the 420.1 nm line. We present the variation of N Ar,m as the Ar pressure and the addition of H 2 to Ar are changed comparatively to recent adsorption spectroscopy measurements. (paper)

  6. Standardization of 40Ar-39Ar dating facility at KDMIPE, ONGC, Dehradun

    International Nuclear Information System (INIS)

    Rathore, S.S.; Singh, M.P.; Vijan, A.R.; Bansal, M.; Prabhu, B.N.; Misra, K.N.

    2003-01-01

    In the pursuit of acquiring state of the art technology, efforts were being made for last more than two years to establish 40 Ar- 39 Ar dating facility at KDMIPE. The 40 Ar- 39 Ar dating technique is an analytical conversion of the conventional K-Ar dating method. In this method, the sample to be dated is first irradiated in a nuclear reactor to transform a portion of 39 K to 39 Ar by the fast neutron reaction i.e. 39 K(n, p) 39 Ar. After irradiation, the sample is placed in an ultra-high vacuum system and the argon extracted from it by fusion is purified and analyzed isotopically in a mass spectrometer. The relative abundances of 40 Ar, 39 Ar, 37 Ar and 36 Ar are measured. The 40 Ar/ 39 Ar K is determined, where 40 Ar is the radiogenic argon, and 39 Ar K is the 39 Ar produced from 39 K during the irradiation. The 40 Ar/ 39 Ar K ratio is proportional to the 40 Ar/ 40 K ratio in the sample and, therefore, is proportional to age

  7. AR DOC: Augmented reality documentaries

    DEFF Research Database (Denmark)

    Vistisen, Peter

    2014-01-01

    Augmented Reality Documentaries (AR DOC) er et ’lille’ Shareplay projekt (ansøgte midler augmented reality cross media løsninger, til at skabe engagerende publikumsformidling...... indenfor oplevelsesindustrien. Projektet har genereret ny viden omkring, hvordan fysisk og digital formidling kan understøttes via Augmented Reality som formidlingsformat....

  8. ARS-Media for Excel

    Science.gov (United States)

    ARS-Media for Excel is an ion solution calculator that uses Microsoft Excel to generate recipes of salts for complex ion mixtures specified by the user. Generating salt combinations (recipes) that result in pre-specified target ion values is a linear programming problem. Thus, the recipes are genera...

  9. "Ars Electronica 2009" / Raivo Kelomees

    Index Scriptorium Estoniae

    Kelomees, Raivo, 1960-

    2009-01-01

    30. "Ars Electronica" festival "Human Nature" ("Inimese loomus") Linzis. Osaka ülikooli professori Hiroshi Ishiguro mehaanilis-digitaalsest nukust. Hübriidkunsti kategoorias peapreemia saanud Eduardo Kaci inimtaimest. Konverentsidest. Näitusest "See this Sound", mis oli pühendatud helile kujutavas kunstis

  10. Kinetics of Ar isotopes during neutron irradiation: 39Ar loss from minerals as a source of error in 40Ar/39Ar dating

    International Nuclear Information System (INIS)

    Hess, J.C.; Lippolt, H.J.

    1986-01-01

    The loss of 39 Ar from minerals in the course of neutron activation for 40 Ar/ 39 Ar dating is studied by directly measuring the loss rates in vacuum-sealed ampoules. Biotite shows 39 Ar losses between 0.1% and 16%. These losses are predominantly due to diffusion processes from K-poor alteration-phase intergrowths in the biotites at the elevated temperatures during the irradiation. Estimates for the irradiation temperatures range from 150 0 to 180 0 C. Direct 39 Ar recoil loss from biotite seems to be minor compared to difussion loss of recoil-implanted 39 Ar. Precise 40 Ar/ 39 Ar dating of biotites therefore requires the measurement of the 39 Ar losses during irradiation. Glauconite loses not only neutron-induced Ar isotopes ( 39 Ar: 20-22%, 37 Ar: 17-19%) but also radiogenic 40 Ar(∼9%). Slight 39 Ar losses are also observed for light micas (0.2% and 0.35%), hornblendes (0.1%) and sanidines (200 and 700 ppm). 25 refs.; 4 figs.; 6 tabs

  11. Influence of residual Ar+ in Ar cluster ion beam for DLC film formation

    International Nuclear Information System (INIS)

    Kitagawa, Teruyuki; Miyauchi, Kazuya; Toyoda, Noriaki; Kanda, Kazuhiro; Ikeda, Tokumi; Tsubakino, Harushige; Matsuo, Jiro; Matsui, Shinji; Yamada, Isao

    2003-01-01

    In order to study the influences of residual Ar monomer ion (Ar + ) on sp 2 content and hardness of diamond like carbon (DLC) films formed by Ar cluster ion beam assisted deposition, Ar cluster ion, Ar + and their mixed ions (Ar cluster ion and Ar + ) bombardments were performed during evaporation of C 60 . From near edge X-ray absorption fine structure (NEXAFS) and Raman spectroscopy measurements, lower sp 2 content in the carbon films was obtained with Ar cluster ion bombardment than that with Ar + and mixed ion. Furthermore higher hardness and smooth surface were shown with Ar cluster ion bombardments. Therefore it was important to reduce Ar + in Ar cluster ion beams to obtain hard DLC films with flat surface

  12. Crítica ao Direito Sumular: a necessidade de democratização processual

    Directory of Open Access Journals (Sweden)

    Gabriela Soares Balestero

    2011-04-01

    Full Text Available

    A finalidade deste estudo é estudar, analisar a questão do ativismo judicial, ou seja, a degeneração de um processo criado de forma solipsista pelo magistrado, sem a participação das partes para a construção do provimento. Portanto, o presente estudo possui dois objetivos específicos: 1 a reformulação processual sob uma perspectiva democrática; 2 a construção do provimento Jurisdicional pelos sujeitos do processo em simétrica paridade de armas. A criação das Súmulas Vinculantes pelo Supremo Tribunal Federal comprova o desgaste do processo jurisdicional ao trazer o comportamento ativista do Poder Judiciário atuando de forma legiferante, criando o direito de maneira antidemocrática. A análise de tal questão é o objetivo deste artigo.

  13. Características de carcaça de caprinos de cinco grupos raciais criados em confinamento Carcass traits of characteristics of kid goats from five breed groups raised in a feedlot system

    Directory of Open Access Journals (Sweden)

    Helen Fernanda Barros Gomes

    2011-02-01

    Full Text Available Este trabalho foi realizado com o objetivo de avaliar a influência do grupo racial e da condição sexual nas características da carcaça de caprinos jovens criados em confinamento. Foram utilizados 91 animais, 52 machos e 39 fêmeas, pertencentes a cinco grupos raciais: Alpino, ½Boer + ½Alpino, ½Anglo Nubiano + ½Alpino, ¾Boer + ¼Alpino, e ½Anglo Nubiano + ¼Boer + ¼Alpino. Foi tomado o peso ao jejum, no dia do abate, após 24 horas de jejum de sólidos. Foram tomadas medidas biométricas e de carcaça, objetiva e subjetivamente. O grupo racial influenciou a altura de cernelha, o comprimento interno e externo da carcaça e o comprimento de perna, que foram maiores nos animais Alpinos, bem como a largura do peito, o escore corporal, os índices de compacidade da carcaça e da perna e a cobertura de gordura da carcaça, que foram melhores nos animais com grau de sangue Boer. Animais machos tiveram maior altura de cernelha, medidas da estérnebra com ultrassom, comprimento interno da carcaça, comprimento de perna, profundidade dos tecidos na altura da 3ª e 4ª estérnebras tomadas na carcaça. Nas demais características corporais avaliadas, não foram encontradas diferenças entre grupos raciais e sexo dos animais. O cruzamento do grupo Boer com Alpino reduz o comprimento das carcaças e aumenta a cobertura de gordura e a quantidade de tecidos depositados, mas não influencia o desempenho do animal.This study was carried out with the objective of evaluating the influence of breed groups and sexual conditional on carcass traits of young goats raised in feedlot. It was used 91 animals, 52 males and 39 females, belonging to five breed groups: Alpine, ½Boer + ½Alpine, ½Nubian + ½Alpine, ¾Boer + ¼Alpine and ½ Anglo-Nubian + ¼Boer + ¼Alpine. On the slaughter day, the shrunk weight was measured after 24 hours of solid fasting. Biometric and carcass measures were objectively and subjectively taken. Racial group influenced withers

  14. 40Ar-39Ar stepheating studies of clay concentrates from Irish orebodies

    International Nuclear Information System (INIS)

    Halliday, A.N.

    1978-01-01

    40 Ar- 39 Ar step heating analyses of clay concentrates from the Gortdrum and Tynagh orebodies (Ireland) previously dated by conventional K-Ar, indicate major losses of 39 Ar (32 to 45%) and rad. 40 Ar (25 to 35%) during the irradiation. The proportion of rad. 40 Ar loss, unlike that of 39 Ar, increases with J-value. The difference between 39 Ar and rad. 40 Ar proportion losses is related to the mineralogy and grain intimacy. These also affect the stepwise release patterns - the Gortdrum concentrates yield age spectra very consistent with 39 Ar recoil predictions, whereas the Tynagh concentrates in which the grains are intimately intergrown, show no clear evidence for 39 Ar recoil depletion in the K-rich phases. The difference is resolvable if illite argon release is not a simple volume diffusion type process under vacuum conditions. (author)

  15. RECURSO AO LEGISLADOR: CONSIDERAÇÕES EM TORNO DO CONTROLE LEGISLATIVO AO PODER JUDICIÁRIO (UM EPITÁFIO À PEC Nº33)

    OpenAIRE

    Dettmam, Deborah; Matos, Nelson Juliano Cardoso

    2017-01-01

    Este artigo discute se o recurso ao povo ou ao legislador, como instrumento de resolução dos conflitos entre os poderes, viola a separação de poderes e a independência do poder judiciário ou se, antes disso, dá fiel execução à separação de poderes. Para alcançar esse objetivo, esse artigo investiga se existe relação entre o recurso ao legislador e os regimes autoritários; se a Constituição Federal de 1988 proíbe outro guardião constitucional, que não o Supremo Tribunal Federal, e quais as con...

  16. HDR-Aggregate Read Service (ARS)

    Data.gov (United States)

    Department of Veterans Affairs — ARS is a SOAP web service exposed over HTTPS that provides an aggregated (report) view of HTH Survey, DMP and Census data stored in the HDR DB. ARS is deployed in...

  17. Desempenho zootécnico e tabela de alimentação de girinos de rã-touro (Rana catesbeiana criados no sistema anfigranja

    Directory of Open Access Journals (Sweden)

    Lima Samuel Lopes

    2003-01-01

    Full Text Available Objetivou-se com a execução deste trabalho avaliar, em nível de campo, o desempenho zootécnico de girinos de rã-touro (Rana catesbeiana criados em ranários comerciais que utilizam o sistema anfigranja, e simultaneamente estimar os valores de consumo diário de ração para compor uma tabela de referência para a alimentação dos animais. Os resultados encontrados nas unidades de observações monitoradas (aproximadamente 249 mil animais atingiram os seguintes índices médios: a mortalidade (em % variou de: 0,7 a 35,2 (média 5,9%; o ganho de peso (g. p/dia: de 0,03 a 0,22 (média 0,11 g/dia; e a conversão alimentar: de 0,92 a 2,75 : 1; (média 1,50 : 1. Comparados com dados preliminares, tais resultados indicam uma significativa otimização dos índices zootécnicos, demonstrando que houve um relativo ganho de produtividade com o aperfeiçoamento das técnicas de manejo implementadas. A redução do valor médio da conversão alimentar aparente foi provocada principalmente pelo adequado uso da tabela de referência, cujos valores foram ratificados durante o trabalho de monitoramento das unidades. Tal tabela possibilita o cálculo da quantidade de alimento a ser oferecido diariamente, baseado nos peso médio dos girinos e na estimativa do percentual de consumo, para temperatura da água entre 18 a 29 graus centígrados, (girinos de 0,1 a 26 gramas de peso médio.

  18. Desenvolvimento e exigências térmicas de Trichogramma pretiosum Riley, criados em duas traças do tomateiro

    Directory of Open Access Journals (Sweden)

    PRATISSOLI DIRCEU

    2000-01-01

    Full Text Available Estudou-se a biologia de Trichogramma pretiosum em ovos de Phthorimaea operculella (Zeller e Tuta absoluta (Meyrick em diferentes temperaturas (18, 20, 22, 25, 30 e 32ºC, 70±10% de umidade relativa e fotofase de 14 horas, com o objetivo de se determinarem as exigências térmicas, bem como o número de gerações durante o ano. Houve correlação inversa entre a duração do ciclo e o aumento de temperatura na faixa térmica estudada. A razão sexual, no entanto, não foi afetada pela temperatura quando o hospedeiro foi T. absoluta. A viabilidade de T. pretiosum, criado em P. operculella foi mais afetada que em T. absoluta. A exigência térmica, calculada pelo método da hipérbole, foi maior no tocante a T. absoluta (131,3 graus dia em relação a P. operculella (120,9 graus dia, e o limiar térmico inferior, respectivamente, 12,98 e 13,53°C. No que tange a ambas as espécies de traças, a longevidade do parasitóide sempre obedeceu à distribuição de Weibull. O potencial de aumento foi avaliado, em ambas as espécies de traças, com base no número de gerações anuais.

  19. $\\beta$ decay of $^{47}$Ar

    CERN Document Server

    Weissman, L; Bergmann, U C; Brown, B A; Catherall, R; Cederkäll, J; Dillmann, I; Hallmann, O; Fraile-Prieto, L M; Franchoo, S; Gaudefroy, L; Köster, U; Kratz, K L; Pfeiffer, B; Sorlin, O; 10.1103/PhysRevC.70.024304

    2004-01-01

    Information on beta -decay properties of neutron-rich /sup 47/Ar was obtained at the ISOLDE facility at CERN using isobaric selectivity. This was achieved by a combination of a plasma-ion source with a cooled transfer line and subsequent mass separation. A doubly charged beam was used in order to improve the signal-to-background ratio associated with multi-charged noble gas fission products. The identification of the /sup 47/Ar gamma -ray transitions was performed by comparing the spectra obtained from direct proton bombardment of the target and of the neutron converter. New excited levels in the daughter /sup 47/K nucleus corresponding to the negative-parity states were observed. The obtained data are compared to the result of large-scale shell model calculations and quasiparticle random-phase approximation predictions. (29 refs).

  20. ARS - Helsinki - 2006 / Galina Balashova

    Index Scriptorium Estoniae

    Balashova, Galina

    2006-01-01

    Steven Holli projekteeritud Kiasma muuseumihoonest Helsingis. Kontseptuaalkunsti näitusest ARS 06 "Reaalsustunne" Kiasmas. Eestlastest esineb Mark Raidpere. Vene kunstnikegrupi AEC+F ja vene kunstnike Juri Vassiljevi ning Aleksandr Ponomarjovi töödest näitusel. Ka Gerda Steineri & Jörg Lenzlingeri (Šveits), Martin & Munoz'i (USA, Hispaania), arvutigraafik Charles Sandisoni (SB), videokunstnik Bill Viola (USA) jt. töödest

  1. Photoionization study of HgAr

    International Nuclear Information System (INIS)

    Linn, S.H.; Brom, J.M. Jr.; Tzeng, W.; Ng, C.Y.

    1985-01-01

    Photoionization efficiency data for HgAr + have been obtained in the region of 680--1240 A. The ionization energy of HgAr was determined to be 10.217 +- 0.012 eV. This value allows the calculation of the dissociation energy of HgAr + to be 0.228 +- 0.017 eV. The relative probabilities for the formation of HgAr + via the reactions Ar* x Hg or Hg* x Ar→ HgAr + +e - with Ar* and Hg* prepared in high Rydberg states in the energy range of 10.22--15.79 eV were estimated. Although the radii for the 3d and 5s Rydberg ortitals of Ar have similar values, the probabilities for the formation of HgAr + from Hg x Ar* with Ar* in the 5s[3/2] 0 1 and 5s'[1/2] 0 1 Rydberg states are substantially greater than those when the Ar* excited atoms are in the 3d[1/2] 0 1 , 3s[3/2] 0 1 , and 3d'[3/2] 0 1 Rydberg levels. The ratio for the cross sections for the formation of HgAr + from Hg x Ar* with Ar* formed in the 3d[1/2] 0 1 and 4d[1/2] 0 1 states, as well as that with Ar* prepared in the 5d[1/2] 0 1 and 6d[1/2] 0 1 states, were found to be consistent with the predictions of the previous impact parameter calculations

  2. AoS28D, a proline-Xaa carboxypeptidase secreted by Aspergillus oryzae.

    Science.gov (United States)

    Salamin, Karine; Eugster, Philippe J; Jousson, Olivier; Waridel, Patrice; Grouzmann, Eric; Monod, Michel

    2017-05-01

    Prolyl peptidases of the MEROPS S28 family are of particular interest because they are key enzymes in the digestion of proline-rich peptides. A BLAST analysis of the Aspergillus oryzae genome revealed sequences coding for four proteases of the S28 family. Three of these proteases, AoS28A, AoS28B, and AoS28C, were previously characterized as acidic prolyl endopeptidases. The fourth protease, AoS28D, showed high sequence divergence with other S28 proteases and belongs to a phylogenetically distinct cluster together with orthologous proteases from other Aspergillus species. The objective of the present paper was to characterize AoS28D protease in terms of substrate specificity and activity. AoS28D produced by gene overexpression in A. oryzae and in Pichia pastoris was a 70-kDa glycoprotein with a 10-kDa sugar moiety. In contrast with other S28 proteases, AoS28D did not hydrolyze internal Pro-Xaa bonds of several tested peptides. Similarly, to human lysosomal Pro-Xaa carboxypeptidase, AoS28D demonstrated selectivity for cleaving C-terminal Pro-Xaa bonds which are resistant to carboxypeptidases of the S10 family concomitantly secreted by A. oryzae. Therefore, AoS28D could act in synergy with these enzymes during sequential degradation of a peptide from its C-terminus.

  3. Combate ao niilismo e ao totalitarismo em Camus

    Directory of Open Access Journals (Sweden)

    Emanuel Ricardo Germano

    2013-05-01

    Full Text Available A partir de uma leitura da peça Calígula, elaborada entre 1941 e 1943, procurar-se-á contribuir na restituição das preocupações éticas, políticas e filosóficas em cena no teatro de Albert Camus, analisando o sentido de sua expressão teatral no contexto de dois combates,ao niilismo filosófico e ao totalitarismo político de seu tempo. Observaremos em Calígula um importante registro do amadurecimento das leituras de duas heranças filosóficas relevantes na formação intelectual de Camus, Nietzsche e Heráclito, à luz da experiência do totalitarismo, observando e ressaltando com isso a amplitude de seu intertexto filosófico e a importância do aporte ético e político de Camus como pensador multifacetado, engajado nos enfrentamentos históricos e solicitações críticas de seu tempo.

  4. The SFMOMA AR Game Jam

    DEFF Research Database (Denmark)

    Brin, Sarah; Gangsei, Erica

    2018-01-01

    In the Summer of 2016, Pokémon Go precipitated a surge of new play experiences in museums. Cultural heritage institutions across disciplines were confronted with the sudden ubiquity of augmented reality (AR). Some museums enthusiastically integrated Pokémon into their programs, while some grapple......, and Rebecca Edwards. “Night at the Museum: The 2016 Getty/USC Game Jam.” Blog. The Getty Iris, March 31, 2016. http://blogs.getty.edu/iris/a-night-at-themuseum-the-2016-gettyusc-game-jam/....

  5. Aerosol Observing System (AOS) Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Jefferson, A

    2011-01-17

    The Aerosol Observing System (AOS) is a suite of in situ surface measurements of aerosol optical and cloud-forming properties. The instruments measure aerosol properties that influence the earth’s radiative balance. The primary optical measurements are those of the aerosol scattering and absorption coefficients as a function of particle size and radiation wavelength and cloud condensation nuclei (CCN) measurements as a function of percent supersaturation. Additional measurements include those of the particle number concentration and scattering hygroscopic growth. Aerosol optical measurements are useful for calculating parameters used in radiative forcing calculations such as the aerosol single-scattering albedo, asymmetry parameter, mass scattering efficiency, and hygroscopic growth. CCN measurements are important in cloud microphysical models to predict droplet formation.

  6. The effects of retrograde reactions and of diffusion on 39Ar-40Ar ages of micas

    DEFF Research Database (Denmark)

    Allaz, Julien; Engi, Martin; Berger, Alfons

    2011-01-01

    Effects of metamorphic reactions occurring during decompression were explored to understand their influence on 39Ar-40Ar ages of micas. Monometamorphic metasediments from the Lepontine Alps (Switzerland) were studied. Collected samples reached lower amphibolite facies during the Barrovian....... XRD-data indicated that some mineral separates prepared for Ar-Ar stepwise heating analysis were monomineralic, whereas others were composed of two white micas (muscovite with paragonite or margarite), or biotite and chlorite. In monomineralic samples 37Ar/39Ar and 38Ar/39Ar (proportional to Ca....../K and Cl/K ratios) did not change and the resulting ages can be interpreted unambiguously. In mineral separates containing two white micas, Ca/K and Cl/K ratios were variable, reflecting non-simultaneous laboratory degassing of the two heterochemical Ar-reservoirs. These ratios were used to identify each...

  7. 40Ar/39Ar dating of the Late Cretaceous

    International Nuclear Information System (INIS)

    Gaylor, Jonathan

    2013-01-01

    As part of the wider European GTS Next project, I propose new constraints on the ages of the Late Cretaceous, derived from a multitude of geochronological techniques, and successful stratigraphic interpretations from Canada and Japan. In the Western Canada Sedimentary Basin, we propose a new constraint on the age of the K/Pg boundary in the Red Deer River section (Alberta, Canada). We were able to cyclo-stratigraphically tune sediments in a non-marine, fluvial environment utilising high-resolution proxy records suggesting a 11-12 precession related cyclicity. Assuming the 40 Ar/ 39 Ar method is inter-calibrated with the cyclo-stratigraphy, the apparent age for C29r suggests that the K/Pg boundary falls between eccentricity maxima and minima, yielding an age of the C29r between 65.89 ± 0.08 and 66.30 ± 0.08 Ma. Assuming that the bundle containing the coal horizon represents a precession cycle, the K/Pg boundary is within the analytical uncertainty of the youngest zircon population achieving a revised age for the K/Pg boundary as 65.75 ± 0.06 Ma. The Campanian - Maastrichtian boundary is preserved in the sedimentary succession of the Horseshoe Canyon Formation and has been placed 8 m below Coal nr. 10. Cyclo-stratigraphic studies show that the formation of these depositional sequences (alternations) of all scales are influenced directly by sea-level changes due to precession but more dominated by eccentricity cycles proved in the cyclo-stratigraphic framework and is mainly controlled by sand horizons, which have been related by auto-cyclicity in a dynamic sedimentary setting. Our work shows that the Campanian - Maastrichtian boundary in the Western Canada Sedimentary Basin coincides with 2.5 eccentricity cycles above the youngest zircon age population at the bottom of the section and 4.9 Myr before the Cretaceous - Palaeogene boundary (K/Pg), and thus corresponds to an absolute age of 70.65 ± 0.09 Ma producing an 1.4 Myr younger age than recent published ages

  8. Triaxial superdeformation in 40Ar

    International Nuclear Information System (INIS)

    Taniguchi, Yasutaka; Ikeda, Kiyomi; Kanada-En'yo, Yoshiko; Kimura, Masaaki; Horiuchi, Hisashi; Ideguchi, Eiji

    2010-01-01

    Superdeformed (SD) states in 40 Ar have been studied using the deformed-basis antisymmetrized molecular dynamics. Low-energy states were calculated by the parity and angular momentum projection and the generator coordinate method (GCM). Basis wave functions were obtained by the energy variation with a constraint on the quadrupole deformation parameter β, while other quantities such as triaxiality γ were optimized by the energy variation. By the GCM calculation, an SD band was obtained just above the ground-state band. The SD band involves a K π =2 + side band due to the triaxiality. The calculated electric quadrupole transition strengths of the SD band reproduce the experimental values appropriately. Triaxiality is significant for understanding low-lying states.

  9. arXiv Probing Leptogenesis

    CERN Document Server

    Chun, E.J.; Dev, P.S.B.; Drewes, M.; Fong, C.S.; Garbrecht, B.; Hambye, T.; Harz, J.; Hernández, P.; Kim, C.S.; Molinaro, E.; Nardi, E.; Racker, J.; Rius, N.; Zamora-Saa, J.

    2018-02-28

    The focus of this chapter lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated from oscillations, as well as leptogenesis from out-of-equilibrium decays. As the Akhmedov-Rubakov-Smirnov (ARS) mechanism allows for heavy neutrinos in the GeV range, this opens up a plethora of possible experimental tests, e.g. at neutrino oscillation experiments, neutrinoless double beta decay, and direct searches for neutral heavy leptons at future facilities. In contrast, testing leptogenesis from out-of-equilibrium decays is a quite difficult task. We comment on the necessary conditions for having successful leptogenesis at the TeV-scale. We further discuss possible realizations and their model specific testability in extended seesaw models, models with extended gauge sectors, and supersymmetric leptogenesis. Not being able to test high-scale leptogenesis directly, we present a way to falsify such scenarios by focusing on their washout processes. This is discussed specific...

  10. Dating method with /sup 39/Ar

    Energy Technology Data Exchange (ETDEWEB)

    Loosli, H H [Bern Univ. (Switzerland). Physikalisches Inst.

    1983-04-01

    The principles of a dating method based on the cosmic-ray-produced radioisotope /sup 39/Ar are given. Technical requirements such as background and standard gas samples and gas proportional counting systems are described. With samples extracted from Greenland ice it can be demonstrated that /sup 39/Ar ages agree with ages obtained by other methods. First results on ocean water samples show that with this isotope valuable information on ocean mixing and circulation can be expected. /sup 39/Ar results on groundwater samples disagree for some aquifers with conventional /sup 14/C ages; possible explanations are discussed, especially underground production of /sup 39/Ar.

  11. GPS-Based AR Games Development Potential

    Directory of Open Access Journals (Sweden)

    Gregorius Alvin Raditya Santoso

    2014-11-01

    Full Text Available The application of new technologies in a game is not a new thing. One example is the application of Augmented Reality (AR technology in game. Many people do not know the application of AR technology in game, although the application of this technology is able to produce a game with unique gameplay. In addition, since AR game is GPS-based, it offers new gaming experience, that is, playing outdoors in which the real world becomes the game arena. This advantage gives the AR technology a huge potential to be developed into a game

  12. O Método Delfos Aplicado ao Turismo no Espaço Rural

    Directory of Open Access Journals (Sweden)

    Rosane Maria Lanzer

    2012-11-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE O Brasil encontra-se na quarta posição quanto ao desenvolvimento da atividade de Turismo Rural, sendo superado somente pela Espanha, Portugal e Argentina. O Turismo Rural no Brasil pode ser explicado por três fatores principais: o interesse dos habitantes do meio urbano em conviver com a natureza, a necessidade do produtor em diversificar sua fonte de renda e de agregar valor aos seus produtos. O método Delfos, criado nos anos de 1950, tem por objetivo gerar informações sobre o futuro. O método se constitui em uma sondagem multifásica, desenvolvida com a participação de um grupo de especialistas no assunto, onde o consenso sobre determinado tópico representaria uma tendência. A aplicação desse método feita em 2003, tendo como horizonte 2010, identificou as possíveis tendências para o turismo no espaço rural. O objetivo deste estudo foi avaliar se a prospecção realizada se concretizou. Nesse estudo foram consideradas quatro questões: 1 o aumento ou diminuição do turismo rural como alternativa de renda; 2 aumento do número de turistas acima de 65 anos; 3 incremento da participação feminina no gerenciamento dos empreendimentos e 4 quando o número de propriedades integradas ao turismo rural chegará a 8.000. Com exceção da questão 2, as respostas otimistas dadas pelos especialistas foram corroboradas por meio das informações obtidas. A previsão de aumento, não demasiado otimista, no número de turistas com idade acima de 65 anos, não pode ser confirmada, ainda que tenha sido constatado na população brasileira um maior número de indivíduos nessa faixa etária.  

  13. 39Ar/Ar measurements using ultra-low background proportional counters

    International Nuclear Information System (INIS)

    Hall, Jeter; Aalseth, Craig E.; Bonicalzi, Ricco M.; Brandenberger, Jill M.; Day, Anthony R.; Humble, Paul H.; Mace, Emily K.; Panisko, Mark E.; Seifert, Allen

    2016-01-01

    Age-dating groundwater and seawater using the 39 Ar/Ar ratio is an important tool to understand water mass-flow rates and mean residence time. Low-background proportional counters developed at Pacific Northwest National Laboratory use mixtures of argon and methane as counting gas. We demonstrate sensitivity to 39 Ar by comparing geological (ancient) argon recovered from a carbon dioxide gas well and commercial argon. The demonstrated sensitivity to the 39 Ar/Ar ratio is sufficient to date water masses as old as 1000 years. - Highlights: • 39 Ar/Ar age dating is important for understanding environmental water migration. • Ultra low background proportional counters have been developed. • 39 Ar is detected in atmospheric argon at a rate of 70.3 counts per day. The demonstrated background is 166 counts per day. • Age dating is possible for water with underground residence time of up to 1000 years.

  14. 40Ar-39Ar method for age estimation: principles, technique and application in orogenic regions

    International Nuclear Information System (INIS)

    Dalmejer, R.

    1984-01-01

    A variety of the K-Ar method for age estimation by 40 Ar/ 39 Ar recently developed is described. This method doesn't require direct analysis of potassium, its content is calculated as a function of 39 Ar, which is formed from 39 K under neutron activation. Errors resulted from interactions between potassium and calcium nuclei with neutrons are considered. The attention is paid to the technique of gradual heating, used in 40 Ar- 39 Ar method, and of obtaining age spectrum. Aplicabilities of isochronous diagram is discussed for the case of presence of excessive argon in a sample. Examples of 40 Ar- 39 Ar method application for dating events in orogenic regions are presented

  15. First-principles calibration of 40Ar/39Ar mineral standards and complete extraction of 40Ar* from sanidine

    Science.gov (United States)

    Morgan, L. E.; Kuiper, K.; Mark, D.; Postma, O.; Villa, I. M.; Wijbrans, J. R.

    2010-12-01

    40Ar/39Ar geochronology relies on comparing argon isotopic data for unknowns to those for knowns. Mineral standards used as neutron fluence monitors must be dated by the K-Ar method (or at least referenced to a mineral of known K-Ar age). The commonly used age of 28.02 ± 0.28 Ma for the Fish Canyon sanidine (FCs) (Renne et al., 1998) is based upon measurements of radiogenic 40Ar in GA1550 biotite (McDougall and Roksandic, 1974), but underlying full data were not published (these measurements were never intended for use as an international standard), so uncertainties are difficult to assess. Recent developments by Kuiper et al. (2008) and Renne et al. (2010) are limited by their reliance on the accuracy of other systems. Modern technology should allow for more precise and accurate calibration of primary K-Ar and 40Ar/39Ar standards. From the ideal gas law, the number of moles of 40Ar in a system can be calculated from measurements of pressure, volume, and temperature. Thus we have designed and are proceeding to build a pipette system to introduce well-determined amounts of 40Ar into noble gas extraction lines and mass spectrometers. This system relies on components with calibrations traceable to SI unit prototypes, including a diaphragm pressure gauge (MKS Instruments), thermocouples, and a “slug” of an accurately determined volume to be inserted into the reservoir for volume determinations of the reservoir and pipette. The system will be renewable, with a lifetime of ca. 1 month for gas in the reservoir, and portable, to permit interlaboratory calibrations. The quantitative extraction of 40Ar* from the mineral standard is of highest importance; for sanidine standards this is complicated by high melt viscosity during heating. Experiments adding basaltic “zero age glass” (ZAG) to decrease melt viscosity are underway. This has previously been explored by McDowell (1983) with a resistance furnace, but has not been quantitatively addressed with laser heating

  16. SRAO: the first southern robotic AO system

    Science.gov (United States)

    Law, Nicholas M.; Ziegler, Carl; Tokovinin, Andrei

    2016-08-01

    We present plans for SRAO, the first Southern Robotic AO system. SRAO will use AO-assisted speckle imaging and Robo-AO-heritage high efficiency observing to confirm and characterize thousands of planet candidates produced by major new transit surveys like TESS, and is the first AO system to be capable of building a comprehensive several-thousand-target multiplicity survey at sub-AU scales across the main sequence. We will also describe results from Robo-AO, the first robotic LGS-AO system. Robo-AO has observed tens of thousands of Northern targets, often using a similar speckle or Lucky-Imaging assisted mode. SRAO will be a moderate-order natural-guide-star adaptive optics system which uses an innovative photoncounting wavefront sensor and EMCCD speckle-imaging camera to guide on faint stars with the 4.1m SOAR telescope. The system will produce diffraction-limited imaging in the NIR on targets as faint as mν = 16. In AO-assisted speckle imaging mode the system will attain the 30-mas visible diffraction limit on targets at least as faint as mν = 17. The system will be the first Southern hemisphere robotic adaptive optics system, with overheads an order of magnitude smaller than comparable systems. Using Robo-AO's proven robotic AO software, SRAO will be capable of observing overheads on sub-minute scales, allowing the observation of at least 200 targets per night. SRAO will attain three times the angular resolution of the Palomar Robo-AO system in the visible.

  17. 244-AR Vault Interim Stabilization Project Plan

    International Nuclear Information System (INIS)

    LANEY, T.

    2000-01-01

    The 244-AR Vault Facility, constructed between 1966 and 1968, was designed to provide lag storage and treatment for the Plutonium-Uranium Extraction Facility (PUREX) tank farm sludges. Tank farm personnel transferred the waste from the 244-AR Vault Facility to B Plant for recovery of cesium and strontium. B Plant personnel then transferred the treatment residuals back to the tank farms for storage of the sludge and liquids. The last process operations, which transferred waste supporting the cesium/strontium recovery mission, occurred in April 1978. After the final transfer in 1978, the 244-AR facility underwent a cleanout. However, 2,271 L (600 gal) of sludge were left in Tank 004AR from an earlier transfer from Tank 241-AX-104. When the cleanout was completed, the facility was placed in a standby status. The sludge had been transferred to Tank 004AR to support Pacific Northwest National Laboratory [PNNL] vitrification work. Documentation of waste transfers suggests that a portion of the sludge may have been moved from Tank 004AR to Tank 002AR in preparation for transfer back to the AX Tank Farm; however, quantities of the sludge that were moved to Tank 002AR from that transfer must be estimated

  18. Cartografar é traçar um plano comum

    Directory of Open Access Journals (Sweden)

    Virgínia Kastrup

    2013-08-01

    Full Text Available A pesquisa de campo sobre produção da subjetividade enfrenta o problema de construir conhecimento envolvendo pesquisadores e pesquisados, com territórios e semióticas singulares. Surgem questões relativas ao protagonismo dos participantes e a como traçar com eles um plano comum, garantindo o caráter participativo da pesquisa. No contexto do método da cartografia, o artigo tem como objetivo tratar do tema do comum num duplo aspecto. Num primeiro, discute o acesso ao plano comum. Com base em Gilles Deleuze e Felix Guattari, tal plano não é dito homogêneo nem reúne atores que manteriam entre si relações de identidade, mas opera comunicação entre singularidades, sendo pré-individual e coletivo. Num segundo aspecto, aponta que, enquanto pesquisa-intervenção, a cartografia se compromete com a criação de um mundo comum e heterogêneo. O artigo mostra que o traçado do comum tem como diretriz metodológica a tranversalidade e examina os procedimentos de participação, inclusão e tradução.

  19. AR4VI: AR as an Accessibility Tool for People with Visual Impairments

    OpenAIRE

    Coughlan, James M.; Miele, Joshua

    2017-01-01

    Although AR technology has been largely dominated by visual media, a number of AR tools using both visual and auditory feedback have been developed specifically to assist people with low vision or blindness – an application domain that we term Augmented Reality for Visual Impairment (AR4VI). We describe two AR4VI tools developed at Smith-Kettlewell, as well as a number of pre-existing examples. We emphasize that AR4VI is a powerful tool with the potential to remove or significantly reduce a r...

  20. 40Ar/39Ar age spectra from the KBS Tuff, Koobi Fora Formation

    International Nuclear Information System (INIS)

    McDougall, I.

    1981-01-01

    40 Ar/ 39 Ar age spectra on anorthoclase phenocrysts from three pumice clasts in the KBS Tuff yield nearly ideal flat patterns, providing good evidence that the samples have remained undisturbed since crystallization. The ages are concordant at 1.88 = 0.02 Myr, and confirm that the KBS Tuff, a key marker bed in the Koobi Fora Formation, northern Kenya, is now very well dated. These results resolve the conflict between earlier 40 Ar/ 39 Ar and conventional K-Ar dating measurements on the KBS Tuff. (author)

  1. 40Ar/39Ar age spectra from the KBS Tuff, Koobi Fora Formation.

    Science.gov (United States)

    McDougall, Ian

    1981-11-12

    40 Ar/ 39 Ar age spectra on anorthoclase phenocrysts from three pumice clasts in the KBS Tuff yield nearly ideal flat patterns, providing good evidence that the samples have remained undisturbed since crystallization. The ages are concordant at 1.88±0.02 Myr, and confirm that the KBS Tuff, a key marker bed in the Koobi Fora Formation, northern Kenya, is now very well dated. These results resolve the conflict between earlier 40 Ar/ 39 Ar and conventional K-Ar dating measurements on the KBS Tuff.

  2. Effects of shock pressure on 40Ar-39Ar radiometric age determinations

    International Nuclear Information System (INIS)

    Davis, P.K.

    1977-01-01

    The relation of shock to the drop in the 40 *Ar/ 39 *Ar ratio seen at high release temperatures in some neutron-irradiated lunar samples is investigated through measurements of the 40 *Ar/ 39 *Ar ratio in gas samples released by stepwise heating of rock samples previously subjected to shock, either in the laboratory or in nature. Explosives were used to shock solid pieces and powder of a basalt from a diabase dike in Liberia to calculated pressures of 65, 150 and 270 kbar. These, an unshocked sample of the powder, two naturally shocked samples from the Brent impact crater in Canada, one unshocked sample from near the crater, and appropriate monitors were irradiated. Ar from stepwise heating was analyzed. The unshocked basalt shows a good 40 *Ar/ 39 *Ar plateau at age 198 +-9 m.y. in agreement with a previous result of 186 +- 2 m.y. The shocked samples contain varying amounts of implanted atmospheric Ar, the isotopes of which have experienced mass fractionation. This effect is small enough in four samples so that the linearity of their graphs of 39 *Ar/ 40 Ar vs 36 Ar/ 40 Ar is evidence of a plateau. The ages of these samples are then 201 +- 10, 205 +- 12 and 201 +-9 m.y. It appears that the shock has had little effect on the 40 Ar- 39 Ar age spectrum, although the release patterns of the 39 *Ar are shifted downward by the order of 200 0 C. Shock implantation of Ar was at lower shock pressure, in the presence of less Ar, and into a less porous material than previously demonstrated. The Brent Crater samples do not all show good plateaus, but do indicate an age of 420 m.y. for the crater event and 795 +- 24 m.y. for the rock formation, in agreement with previous results. None of the 40 *Ar/ 39 *Ar profiles shows a drop at high temperature, but a possible role of shock implantation of Ar is indicated in the production of this effect. Further experiments are suggested. (author)

  3. Photodissociation dynamics of Ar2(+) and Ar3(+) excited by 527 nm photons.

    Science.gov (United States)

    Lepère, V; Picard, Y J; Barat, M; Fayeton, J A; Lucas, B; Béroff, K

    2009-05-21

    The photofragmentation dynamics of Ar(2)(+) and Ar(3)(+) clusters has been investigated at a 527 nm wavelength (2.35 eV) using a setup that allows simultaneous detection of the ionic and neutral fragments in a coincidence experiment. Measurement of positions and times of flight enables in principle a complete description of the fragmentation dynamics. The photofragmentation dynamics of Ar(3)(+) clusters is similar to that of Ar(2)(+) with, in addition, the ejection of a third fragment that can be neutral or ionized via a resonant electron capture. This is attributed to the triangular geometry of the Ar(3)(+) ion.

  4. Single electron capture by state-prepared Ar2+ projectiles in Ar

    International Nuclear Information System (INIS)

    Puerta, J.; Huber, B.A.

    1985-03-01

    Electron capture by state-selected Ar 2+ projectiles in Ar has been studied at low collision energies ( 2+ ions are measured explaining existing discrepancies of partial and total cross sections in the Ar 2+ /Ar collision system. Although highly excited metastable ions ( 5 D 4 0 , 3 F 4 0 ) represent a minor contamination of a non-prepared Ar 2+ beam (proportional1%), their contributions are found to dominate the capture process due to cross section values larger than 10 -15 cm 2 . (orig.)

  5. 3 to 15 keV Ar+ induced Auger electron emission from Si and Ar

    International Nuclear Information System (INIS)

    Kempf, J.; Kaus, G.

    1977-01-01

    Ar + induced Auger electrons from Si and Ar were investigated at bombardment energies between 3-15 keV and target currents of a few μA. The Auger electron yields were compared with secondary ion yields of Si and Ar by simultaneous SIMS-AES measurements. In the ion induced Auger spectra of Si five Auger peaks and in the Ar spectra three Auger peaks were observed. The ion induced Auger electron yield of Si and Ar were found to be strongly dependent upon the primary ion energy. 'Bulk like' and 'atomic like' Auger transitions of ion induced Auger electrons of Si were observed. (orig.) [de

  6. 37Ar and 39Ar in meteorites and the spatial cosmic ray gradient

    International Nuclear Information System (INIS)

    Heusser, G.; Schaeffer, O.A.

    1977-01-01

    Cosmic-ray-produced 37 Ar (tsub(1/2) = 35 days), and 39 Ar (tsub(1/2) = 269 years) in the Fe-Ni phase of meteorites have been studied in connection with their implications for the radial gradient of cosmic ray particles. For the chondrite, Canon City, which fell on October 27, 1973, 20.1 +- 1.5 dpm/kg FeNi of 37 Ar and 22.5 +- 1.4 dpm/kg FeNi of 39 Ar was found. Usually, the 37 Ar/ 39 Ar ratio is used to deduce a spatial gradient. However, 37 Ar data reported in the literature are inconsistent. They fluctuate much more than could be accounted for by different orbits and the anticipated correlation with the cosmic ray neutron registrations is rather weak. Consequently, the 37 Ar/ 39 Ar-derived gradient has a low confidence level. On the other hand, 39 Ar activities group close to a mean value of 22.5 dpm/kg FeNi and appear to be almost independent of the different meteoroid orbits. A comparison of measured 39 Ar activities in meteorites with those calculated for orbits obtained from fireball data shows that a gradient of 10%/Au or less is reconcilable with the experimental findings. The average gradient (E > 200 MeV) during the last 500 years was probably not much larger than that measured presently by the Pioneer 10 and 11, and Helios spacecrafts. (Auth.)

  7. 40Ar/39Ar laser-probe dating of diamond inclusions from the Premier kimberlite

    International Nuclear Information System (INIS)

    Phillips, D.; Onstott, T.C.; Harris, J.W.; Strathclyde Univ., Glasgow

    1989-01-01

    Inclusions encapsulated by diamonds at the time of their formation provide a means for determining diamond crystallization ages and the chemistry of the surrounding upper mantle at that time. Sm-Nd studies of peridotitic inclusions, from Cretaceous-age kimberlites in southern Africa, suggest that the diamonds formed 3.3 Gyr ago. By contrast, eclogite-suite inclusions generally yield younger ages, sometimes approaching the time of kimberlite eruption. Here we report the results of 40 Ar/ 39 Ar laser-probe analyses of individual eclogitic clinopyroxene inclusions from Premier diamonds, which yield a mean age of 1,198±14 Myr. This age agrees well with Sm-Nd and 40 Ar/ 39 Ar analyses on similar Premier inclusions, and is indistinguishable from the inferred time of emplacement of the host kimberlite (1,150-1,230 Myr), which implies that diamond formation was essentially synchronous with kimberlite generation. The extrapolated non-radiogenic 40 Ar/ 36 Ar ratio of 334±102 is similar to the present-day atmospheric composition. This value is inconsistent with Sr and Nd isotopic signatures from Premier eclogite inclusions, which suggest a depleted mantle source ( 40 Ar/ 36 Ar>20,000). Pre-entrapment equilibration of the inclusions with an 36 Ar-rich fluid is the most probable explanation for the low non-radiogenic ( 40 Ar/ 36 Ar) composition. (author)

  8. Evidence of interatomic Coulombic decay in ArKr after Ar 2p Auger decay

    International Nuclear Information System (INIS)

    Morishita, Y; Saito, N; Suzuki, I H; Fukuzawa, H; Liu, X-J; Sakai, K; Pruemper, G; Ueda, K; Iwayama, H; Nagaya, K; Yao, M; Kreidi, K; Schoeffler, M; Jahnke, T; Schoessler, S; Doerner, R; Weber, T; Harries, J; Tamenori, Y

    2008-01-01

    We have identified interatomic Coulombic decay (ICD) processes in the ArKr dimer following Ar 2p Auger decay, using momentum-resolved electron-ion-ion coincidence spectroscopy and simultaneously determining the kinetic energy of the ICD electron and the KER between Ar 2+ and Kr + . We find that the spin-conserved ICD processes in which Ar 2+ (3p -3 3d) 1 P and 3 P decay to Ar 2+ (3p -2 ) 1 D and 3 P, respectively, ionizing the Kr atom, are significantly stronger than the spin-flip ICD processes in which Ar 2+ (3p -3 3d) 1 P and 3 P decay to Ar 2+ (3p -2 ) 3 P and 1 D, respectively

  9. 40Ar-39Ar age determinations on the Owyhee basalt of the Columbia plateau

    International Nuclear Information System (INIS)

    Bottomley, R.J.; York, D.

    1976-01-01

    40 Ar/ 39 Ar step-heating analyses have been performed on 11 samples of basalt from sites near Owyhee Reservoir of southeastern Oregon, U.S.A. These rocks were extruded during the great flood basalt episode of the Pacific Northwest. The whole-rock points are highly correlated on a plot of 40 Ar/ 36 Ar versus 39 Ar/ 36 Ar, corresponding to a common age of the samples of 14.3+-0.3 m.y. Inspite of this, individual 'plateau' plots of the age versus fraction of 39 Ar released do not give good plateaux. These age spectra exhibit to varying degrees a common structure in which lower age values are found at higher temperatures. This pattern may result from a closed-system redistribution of the argon isotopes. The usefulness of grinding the basalts in removing a loosely held atmospheric argon component is confirmed. (Auth.)

  10. OS LIMITES DA COMPETÊNCIA NORMATIVA DO CONSELHO NACIONAL DE JUSTIÇA (CNJ FACE AOS SERVIÇOS NOTARIAIS E DE REGISTRO

    Directory of Open Access Journals (Sweden)

    Maria Tereza Fonseca Dias

    2017-06-01

    Full Text Available O Conselho Nacional de Justiça, órgão de controle do Judiciário, foi criado com objetivo fiscalizador, sob a perspectiva da legalidade e eficiência. A Constituição de 1988 determinou que cabe ao Judiciário a competência para fiscalizar os serviços notariais e de registro quando prestados por delegatários. Este trabalho analisou os limites legais da competência normativa do órgão, que tem reiteradamente expedido normas reguladoras de serviço aos notários e registradores, nelas incluindo normas para o concurso visando a seleção do particular que irá prestar os serviços por delegação do Estado. O trabalho foi realizado sob a perspectiva metodológica dogmático jurídica e hermenêutica.

  11. Mudanças Organizacionais em Empreendimentos de Agricultura Familiar a partir do Acesso ao Programa Nacional de Alimentação Escolar

    Directory of Open Access Journals (Sweden)

    Marcio Gomes Silva

    2015-06-01

    Full Text Available Resumo:Este trabalho analisa as mudanças organizacionais que ocorreram em empreendimentos da agricultura familiar do município de Espera Feliz (MG a partir da operacionalização de ações do Programa Nacional de Alimentação Escolar (PNAE. O caso da Cooperativa da Agricultura Familiar e Solidária de Espera Feliz (Coofeliz foi analisado a partir da abordagem da sociologia econômica para identificar e compreender as mudanças que ocorrem na medida em que se deu a adesão ao PNAE. A análise permitiu identificar que os processos de organização produtiva dos cooperados e a organização gerencial da cooperativa foram significativamente afetados pelo conjunto de regras e procedimentos estabelecidos pelo programa. As novidades institucionais promovidas pelo programa influenciaram o surgimento de inovações organizacionais, cujo principal exemplo foi o "Vale Solidário", criado para suprir a dificuldade de pagamento aos agricultores devido à ausência de capital de giro. As relações estabelecidas entre os cooperados e os agentes envolvidos no processo de aquisição de alimentos para alimentação escolar permitiram o surgimento de padrões de mercado mais próximos à realidade dos agricultores familiares. Por fim, o acesso ao PNAE também provocou mudanças na matriz produtiva dos cooperados, no sentido de maior diversificação produtiva, ao invés de uma especialização voltada para uma commodity

  12. On mechanism of Ar(3p54p) states excitation in low-energy Ar-Ar collisions

    International Nuclear Information System (INIS)

    Kurskov, S Y; Kashuba, A S

    2009-01-01

    The present work is devoted to study of Ar(3p 5 4p) states excitation in binary low-energy Ar-Ar collisions. The results of the experimental investigation of excitation cross sections of Ar I 4p'[l/2] 1 , 4p'[3/2] 1 , 4p'[3/2] 2 and 4p[3/2] 2 levels in the collision energy range from threshold up to 500 eV (cm) and degree of polarization for 4s[3/2] 2 0 -4p'[l/2] 1 and 4s[3/2] 2 0 -4p[3/2] 2 transitions in this energy range are represented.

  13. Ars Baltica-verkoston puheenjohtajuus Suomeen Risto Ruohoselle

    Index Scriptorium Estoniae

    1999-01-01

    1990. a. loodud võrgustiku Ars Baltica sekretariaat (Ars Baltica Contact Point & Communication Center) tuleb Kielist Tallinnasse Eesti kultuuriministeeriumi kuni aastani 2002 (Suur-Karja 23). Ars Baltica (ühendus)

  14. A flavor of 40Ar-39Ar geochronology research at lIT Bombay

    International Nuclear Information System (INIS)

    Pande, Kanchan

    2017-01-01

    Geochronology based on radiogenic isotopes has become an invaluable tool in earth sciences. Several radioactive parent-daughter systems of varying half-lives such as Rb-Sr, Sm-Nd, K-Ar have been traditionally used by researchers for determining the timing of geological and planetary processes. 40 Ar- 39 Ar dating, a variant of the K-Ar system, is a well-established and versatile method of determining the eruptive ages of volcanic rocks and the ∼150-500° C thermal histories of a variety of more slowly cooled igneous and metamorphic rocks. In the 40 Ar- 39 Ar method the sample is irradiated by fast neutrons in a nuclear reactor to convert some of 39 K into 39 Ar. The fixed natural ratio 39 K/ 40 K provides estimate for the parent 40 K by measuring 39 Ar. In order to know the conversion factor of 39 K to 39 Ar and to take care of other nuclear interfering reactions a sample of known K-Ar age is irradiated along with the unknown. The age of the unknown is then derived by comparison with the monitor sample of known age

  15. Ar-40/Ar-39 Studies of Martian Meteorite RBT 04262 and Terrestrial Standards

    Science.gov (United States)

    Park, J.; Herzog, G. F.; Turrin, B.; Lindsay, F. N.; Delaney, J. S.; Swisher, C. C., III; Nagao, K.; Nyquist, L. E.

    2014-01-01

    Park et al. recently presented an Ar-40/Ar-39 dating study of maskelynite separated from the Martian meteorite RBT 04262. Here we report an additional study of Ar-40/Ar-39 patterns for smaller samples, each consisting of only a few maskelynite grains. Considered as a material for Ar-40/Ar-39 dating, the shock-produced glass maskelynite has both an important strength (relatively high K concentration compared to other mineral phases) and some potentially problematic weaknesses. At Rutgers, we have been analyzing small grains consisting of a single phase to explore local effects that might be averaged and remain hidden in larger samples. Thus, to assess the homogeneity of the RBT maskelynite and for comparison with the results of, we analyzed six approx. 30 microgram samples of the same maskelynite separate they studied. Furthermore, because most Ar-40/Ar-39 are calculated relative to the age of a standard, we present new Ar-40/Ar-39 age data for six standards. Among the most widely used standards are sanidine from Fish Canyon (FCs) and various hornblendes (hb3gr, MMhb-1, NL- 25), which are taken as primary standards because their ages have been determined by independent, direct measurements of K and A-40.

  16. Customer satisfaction and response to AOS

    Science.gov (United States)

    1999-01-01

    Passenger surveys were conducted in each of three successive springs in order to track passenger perception of changes in service quality during AOS implementation. In general, no improvement in passenger perceptions was observed relative to a high b...

  17. Contenido de los nutrientes básicos en Catolaccus grandis Burks criados sobre larvas del picudo del algodon Basic nutrients content of Catolaccus grandis Burks reared in cotton boll weevil larvae

    Directory of Open Access Journals (Sweden)

    LÚCIA HELENA AVELINO ARAUJO

    2000-09-01

    Full Text Available El objetivo del trabajo fue determinar los niveles de carbohidratos, proteínas solubles y aminoácidos libres de larvas, pupas hembras y adultos hembras de Catolaccus grandis (Burks (Hymenoptera: Pteromalidae criados sobre larvas del picudo del algodón envenenadas por hembras del parasitoide y por larvas de primer instar del parasitoide. Esto estudio fue conducido en la Unidade de Investigación de Control Biologico de Plagas del Departamento de Agricultura de los Estados Unidos de la América, en Weslaco, Texas. Las 20 muestras de cada uno de los tres estados de desarrollo: tercer instar larval, pupas hembra y adultos hembra del parasitoide C. grandis, fueron separadas y pesadas individualmente y se cuantió el contenido de carbohidratos totales, proteínas solubles totales y aminoácidos libres criados en diferentes sustratos. Los resultados obtenidos confirman la existencia de patrones metabólicos significativamente distintos de estos nutrientes básicos.The aim of this work was to determine the levels of carbohydrate, soluble proteins and free amino acids of larvae, pupae and adult females Catolaccus grandis Burks (Hymenoptera: Pteromalidae which were reared in cotton (Gossypium hirsutum L. r. latifolium Hutch boll weevil (Anthonomus grandis larvae venomized by ectoparasitoid of female and 1st instar ectoparasitoid larvae. This study was carried out at the Biological Control of Pests Research Unit, Weslaco, Texas. The twenty samples of each one of three stages of development: 3rd instar larval, female pupae and female adult of parasitoid C. grandis were separated and individually weighted, and levels of carbohydrates, proteins and amino acids were quantified when reared in different substrates. The results confirmed the existence of metabolic patterns significantly distinct from the basic nutrient model.

  18. Do Universo Privado ao Espaço Aberto, do Espaço Aberto ao Universo Privado - Recepção e Gênese de L´Étranger de Albert Camus

    Directory of Open Access Journals (Sweden)

    Samara Geske

    2009-10-01

    Full Text Available Este artigo pretende traçar linhas gerais sobre a recepção e a gênese de L’Étranger , passando pelo universo privado dos primeiros leitores do manuscrito até chegar ao espaço aberto de seus primeiros críticos, para do espaço aberto da obra publicada retornar o universo privado do processo de criação do romance.

  19. Ars ornata / Kadri Mälk

    Index Scriptorium Estoniae

    Mälk, Kadri, 1958-

    1998-01-01

    V rahvusvaheline ehtekunsti konverents 'Ars ornata Europeana' juuni lõpus Stockholmis. New Yorgis elava kuraatori Charon Kranseni ja prantsuse ehtekunstniku Christophe Burger' juhitud vestlusringidest. 1997. a. Pariisis loodud International Craft Design Association'ist (ICDA).

  20. ARS 01 Helsingi Kiasmas / Tarmo Virki

    Index Scriptorium Estoniae

    Virki, Tarmo

    2001-01-01

    Helsingis Kiasmas avatud rahvusvahelisest kunstinäitusest ARS 01 alapealkirjaga "Avanevaid perspektiive", kus esines oma töödega ka Marko Mäetamm. Näituse raames toimuvast Santiago Sierra kunstiprojektist kodututega

  1. Vector analyzing power and cross section for the reactions 40Ar(d(pol),p)41Ar and 40Ar(d(pol),t)39Ar

    International Nuclear Information System (INIS)

    Sen, S.; Darden, S.E.; Yoh, W.A.; Berners, E.D.

    1975-01-01

    Angular distributions of vector analyzing power and cross section for the reactions 40 Ar(d,p) 41 Ar and 40 Ar(d,t) 39 Ar have been measured at an incident deuteron energy of 14.83 MeV. The bound-state data in the (d,p) reaction and the (d,t) data are compared to DWBA calculations. The data for the neutron-unbound states are analyzed in the framework of the DWBA using (i) a form factor for weakly bound neutron and (ii) a resonance form factor, following the approach of Vincent and Fortune. The j-dependence of the (d,p) vector analyzing power permits definite spin-parity assignments to be made for 19 neutron-bound and 4 neutron unbound states in 41 Ar with excitation energy up to 6.57 MeV. Tentative Jsup(π) assignments have been made for 3 states. The l-value for the 5.62 MeV states has been determined. Data for the observed unbound states are found to be equally well reproduced by the type (i) calculations as by the type (ii) calculations. The (d,t) vector cnalyzing power data show definite J-dependence although not as strongly as in the (d,p) reaction. For relatively weakly excited states a pre-knowledge of the l-value of the transition is desirable for an unambiguous spin assignment. In general, the J-dependence in the (d,t) vector analyzing power can be utilized for definitive Jsup(π) assignments. On this basis, Jsub(π) values have been assigned for seven states in 39 Ar with excitation energies up to 4.47MeV excitation. Possible spin values for three other states are suggested. Spectroscopic factors fo the states in 41 Ar and 39 Ar have been extracted and are in fair agreement with those obtained by other workers. (Auth.)

  2. Jumps in binomial AR(1) processes

    OpenAIRE

    Weiß , Christian H.

    2009-01-01

    Abstract We consider the binomial AR(1) model for serially dependent processes of binomial counts. After a review of its definition and known properties, we investigate marginal and serial properties of jumps in such processes. Based on these results, we propose the jumps control chart for monitoring a binomial AR(1) process. We show how to evaluate the performance of this control chart and give design recommendations. correspondance: Tel.: +49 931 31 84968; ...

  3. AR4VI: AR as an Accessibility Tool for People with Visual Impairments.

    Science.gov (United States)

    Coughlan, James M; Miele, Joshua

    2017-10-01

    Although AR technology has been largely dominated by visual media, a number of AR tools using both visual and auditory feedback have been developed specifically to assist people with low vision or blindness - an application domain that we term Augmented Reality for Visual Impairment (AR4VI). We describe two AR4VI tools developed at Smith-Kettlewell, as well as a number of pre-existing examples. We emphasize that AR4VI is a powerful tool with the potential to remove or significantly reduce a range of accessibility barriers. Rather than being restricted to use by people with visual impairments, AR4VI is a compelling universal design approach offering benefits for mainstream applications as well.

  4. The effects of acid treatment and sample preparation on 40Ar/39Ar ages

    Science.gov (United States)

    Morgan, L. E.; Davidheiser, B.; Kuiper, K.; Wijbrans, J. R.

    2011-12-01

    Practitioners of K-Ar and 40Ar/39Ar geochronology regularly use dilute acids (typically 5-10% hydrofluoric acid (HF)) to clean mineral grains prior to irradiation (in the case of 40Ar/39Ar), and analysis (e.g. Evernden and Curtis, 1965; Dalrymple, 1967). This treatment has been shown to reduce contamination from atmospheric Ar, which consists largely of 40Ar and thus must be differentiated from radiogenic 40Ar* (Evernden and Curtis, 1965). Acid treatments can also remove fine grained material attached to mineral grains, such as glass shards or devitrified glass, which can affect analyses and is difficult to remove by other means (Evernden and Curtis, 1965). Such treatments were originally examined for their efficacy in reducing atmospheric argon contamination (Dalrymple, 1967) but were not assessed for the possibility of leaching Ar* or K differentially, which would affect both K-Ar and 40Ar/39Ar ages. Indeed, Evernden and Curtis (1965) state that they are simply removing the "outer portions of the crystals" and apparently do not account for the potential for leaching of 40Ar* or K from the mass of their host mineral. Moreover, the capabilities of the K-Ar system in the 1960s was limited to a precision of ca. 3-4% on samples of 1-3 Ma (Cox and Dalrymple, 1967). Effects of smaller magnitude could not have been detected at the time. As the developments of the 40Ar/39Ar system and modern mass spectrometer technology have allowed for precision to approach 0.1%, the potential effects of acid treatment during sample preparation warrant revisiting. Additionally, the use of Calgon for sample disintegration has not previously been quantitatively assessed but is used extensively in some laboratories. Here we present a series of experiments from co-irradiated Fish Canyon sanidine (FCs) and Mes-4 (Kuiper et al., 2008). FCs is used as the mineral standard following standard procedures. Mes-4 splits were treated with H2O (10 minutes, ultrasonic), Calgon (10%, overnight at 50

  5. Age measurements of potassium-bearing sulfide minerals by the 40Ar/39Ar technique

    International Nuclear Information System (INIS)

    Czamanske, G.K.; Lanphere, M.A.; Erd, R.C.; Blake, M.C. Jr.

    1978-01-01

    K-Ar ages have been determined for sulfide minerals for the first time. The occurrence of adequate amounts of potassium-bearing sulfides with ideal compositions K 3 Fe 10 S 14 (approximately 10 wt.% K) and KFe 2 S 3 (approximately 16 wt.% K) in samples from a mafic alkalic diatreme at Coyote Peak, California, prompted an attempt to date these materials. K 3 Fe 10 S 14 , a massive mineral with conchoidal fracture, gives an age of 29.4 +- 0.5 m.y. ( 40 Ar/ 39 Ar), indistinguishable from the 28.3 +- 0.4 m.y. ( 40 Ar/ 39 Ar) and 30.2 +- 1.0 m.y. (conventional K-Ar) ages obtained for associated phlogopite (8.7 wt.% K). KFe 2 S 3 , a bladed, fibrous sulfide, gives a younger age, 26.5 +- 0.5 m.y. ( 40 Ar/ 39 Ar), presumably owing to Ar loss. (Auth.)

  6. Geochronology and thermochronology by the sup 40 Ar/ sup 39 Ar method

    Energy Technology Data Exchange (ETDEWEB)

    McDougall, I. (Australian National Univ., Canberra (Australia)); Harrison, T.M. (State Univ. of New York, Albany, NY (USA))

    1988-01-01

    This work is a response to the authors' belief that there is a need for a monograph on {sup 40}Ar/{sup 39}Ar dating to provide concise knowledge concerning the application of this method to geological studies. They aim to provide a reasonably comprehensive but by no means exhaustive coverage of the principles and practices of {sup 40}Ar/{sup 39}Ar dating, with emphasis on interpretation of results. In attempting to provide an overview of the current state of knowledge, they commonly cite examples from the available literature. They draw rather heavily upon their own work, because they feel comfortable with their own examples. (author).

  7. 40Ar/39Ar age and thermal history of the Kirin chondrite

    International Nuclear Information System (INIS)

    Wang, S.; McDougall, I.; Tetley, N.; Harrison, T.M.

    1980-01-01

    The Kirin meteorite, a large (> 2800 kg) H5 chondrite, fell in Kirin Province, China in 1976. A sample from each of the two largest fragments (K-1. K-2) yield 40 Ar/ 39 Ar total fusion ages of 3.63 +- 0.02 b.y. and 2.78 +- 0.02 b.y. respectively. 40 Ar/ 40 Ar age spectra show typical diffusional argon loss profiles. Maximum apparent ages of 4.36 b.y. (K-1) and approx. 4.0 b.y. (K-2) are interpreted as possible minimum estimates for the age of crystallization of the parent body. (orig./ME)

  8. Avaliação da sensibilidade da goiabeira 'Pedro Sato' ao ozônio

    Directory of Open Access Journals (Sweden)

    Regina Maria de Moraes

    2011-09-01

    Full Text Available O objetivo deste trabalho foi avaliar a sensibilidade da goiabeira 'Pedro Sato' ao ozônio (O3, em comparação à cultivar Paluma, descrita como sensível. Oito plantas de cada cultivar foram submetidas separadamente a ar filtrado e a ar filtrado + O3, cinco horas por dia, durante quatro dias. Foram avaliadas fotossíntese (Asat, injúrias foliares visíveis e concentração de antocianinas e taninos. Plantas das duas cultivares também foram expostas, durante três meses, a condições ambientais em local contaminado por O3, tendo-se avaliado fotossíntese, injúrias foliares e crescimento. Plantas fumigadas com O3 apresentaram redução de Asat e da atividade fotoquímica, além de manifestação de injúrias foliares. 'Paluma' apresentou maior redução de Asat, injúrias foliares mais severas e redução de taninos. Quando exposta ao ambiente contaminado, 'Paluma' apresentou trocas gasosas mais altas, mas apresentou redução de Asat 30 dias antes que 'Pedro Sato'. O crescimento não foi afetado em 'Pedro Sato', cujas injúrias foliares tiveram menor incidência, severidade e precocidade do que em 'Paluma'. A menor taxa de crescimento de 'Paluma' indica maior sensibilidade ao O3. Apesar de responder com menor intensidade ao estresse induzido pelo O3, a cultivar Pedro Sato não pode ser considerada tolerante, pois apresenta danos fotoquímicos, injúrias foliares e alterações nos conteúdos de metabólitos secundários quando exposta a esse poluente.

  9. A radiation-electric-field combination principle for SO2-oxidation in Ar-mixtures

    International Nuclear Information System (INIS)

    Leonhardt, J.; Krueger, H.; Popp, P.; Boes, J.

    1981-01-01

    A simple model for a radiation-induced SO 2 -oxidation in Ar using SO 2 /O 2 /Ar-mixtures has been described by Leonhardt a.o. It is possible to improve the efficiency of the radiation-induced SO 2 -oxidation in such mixtures if the electrons produced by the ionizing radiation are accelerated by means of an electric field. The energy of the field-accelerated electrons must be high enough to form reactive SO 2 radicals but not high enough to ionize the gas mixture. Such an arrangement is described. The connection between the rate of SO 3 -formation and the electric field and the connection between SO 3 -formation and decreasing of the O 2 -concentration in the reaction chaimber were experimentally determined. Further the G-values attained by means of the radiation-electric-field combination are discussed. (author)

  10. Instrumentos relacionados ao diabetes mellitus adaptados e validados para a cultura brasileira

    Directory of Open Access Journals (Sweden)

    Raquel Curcio

    2011-06-01

    Full Text Available Trata-se de um estudo de revisão integrativa, cujo objetivo foi buscar evidências disponíveis na literatura sobre os instrumentos e escalas relacionados ao diabetes mellitus adaptados e validados para a cultura brasileira. Após busca nas bases eletrônicas BDENF, SciELO, LILACS, foram incluídos sete instrumentos que atenderam aos critérios de inclusão: Diabetes Mellitus Knowledge (DKN-A; Diabetes Mellitus Attitude (ATT-19; Diabetes Quality of Life Measure (DQOL-Brasil; Diabetes Quality of Life for Youths (DQOLY-Brasil; Diabetes 39 (D-39; Insulin Management Diabetes Self-efficacy (IMDSES; Problem Areas in Diabetes (PAID e Summary of Diabetes Self-Care Activities Questionnaire (QAD. Os resultados permitiram traçar uma comparação entre os instrumentos disponíveis, além de conhecer as limitações quanto ao processo de validação e aplicação clínica. Espera-se que esse estudo possa contribuir para uma maior divulgação dos instrumentos relacionados ao diabetes mellitus disponíveis para a cultura brasileira, e oferecer subsídios para a sua utilização em pesquisa ou assistência de enfermagem.

  11. On the doubly ionized states of Ar2 and their intra- and interatomic decay to Ar23+

    International Nuclear Information System (INIS)

    Stoychev, Spas D.; Kuleff, Alexander I.; Tarantelli, Francesco; Cederbaum, Lorenz S.

    2008-01-01

    Potential energy curves of the Auger state Ar + (2p -1 )-Ar, the different one- and two-site dicationic states Ar 2 ++ (with energies in the range of 32-77 eV), and the lowest two-site tricationic states Ar ++ -Ar + (with energies in the range of 64-76 eV) computed using elaborated ab initio methods are reported. The accessible relaxation channels of the electronic states of Ar ++ -Ar populated by Auger decay are studied. In particular, we study in detail the interatomic Coulombic decay following the population of one-site satellite states of Ar ++ (3s -1 3p -1 )-Ar recently observed experimentally. Other relaxation pathways of Ar ++ -Ar, including radiative charge transfer, nuclear dynamics through curve crossing, and intra-atomic decay processes are also investigated

  12. Classical treatment of Li2++Ar and He2++Ar collisions

    International Nuclear Information System (INIS)

    Jorge, A; Illescas, Clara; Pons, B

    2015-01-01

    Classical Trajectory Monte Carlo calculations are carried out for Li 2+ +Ar and He 2+ +Ar collisions, motivated by recent experiments on these systems. Cross sections for electron capture, projectile electron loss and target multiple ionization processes are evaluated and compared to the experimental values in the 75-500 keV/amy impact energy range. (paper)

  13. A refined astronomically calibrated 40Ar/39Ar age for Fish Canyon sanidine

    NARCIS (Netherlands)

    Rivera, T.A.; Storey, M.; Zeeden, C.; Hilgen, F.J.; Kuiper, K.

    2011-01-01

    Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the FishCanyon sanidine (FCs) neutron fluence monitor,

  14. AR copy number and AR signaling-directed therapies in castration-resistant prostate cancer.

    Science.gov (United States)

    Salvi, Samanta; Conteduca, Vincenza; Lolli, Cristian; Testoni, Sara; Casadio, Valentina; Zaccheroni, Andrea; Rossi, Lorena; Burgio, Salvatore Luca; Menna, Cecilia; Schepisi, Giuseppe; De Giorgi, Ugo

    2017-11-22

    Adaptive upregulation of androgen receptor (AR) is the most common event involved in the progression from hormone sensitive to castration-resistant prostate cancer (CRPC). AR signaling remains the main target of new AR signalling-directed therapies such as abiraterone and enzalutamide in CRPC patients. In this review, we discuss general mechanisms of resistance to AR-targeted therapies, with a focus on the role of AR copy number (CN). We reported methods and clinical applications of AR CN evaluation in tissue and liquid biopsy, thus to have a complete information regarding its role as predictive and prognostic biomarker. Outcomes of CRPC patients are reported to be highly variable as consequence of tumor heterogeneity. AR CN could contribute to patient selection and tumor monitoring in CRPC treated with new anti-cancer treatment as abiraterone and enzalutamide. Further studies to investigate AR CN effect to these agents and its potential combination with other prognostic or predictive clinical factors are necessary in the context of harmonized clinical trial design. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  15. Support for the Astronomically Calibrated 40Ar/39Ar Age of Fish Canyon Sanidine

    DEFF Research Database (Denmark)

    Rivera, Tiffany; Storey, Michael; Zeeden, Christian

    2011-01-01

    al. (2008) determined an astronomically calibrated 40Ar/39Ar age of 28.201 0.046 Ma (2), relative to the indirect astronomically tuned Moroccan Melilla Basin Messâdit section. Here, we provide independent verification for the Kuiper, et al. (2008) FCs age using sanidines extracted from the A1 tephra...

  16. Desnudar e dançar, a pesar de... [Clarice Lispector e Pina Bausch

    Directory of Open Access Journals (Sweden)

    Eleonora Frenkel

    2013-07-01

    Full Text Available O texto propõe pensar a escritura de Clarice Lispector como a condução de um corpo-linguagem que quer se espaçar como o corpo do dançarino: livre de qualquer determinação exterior. Uma escrita que se desloca evadindo as figurações e a fixidez do discurso condutor de sentido. O desafio está em sair das normativas da linguagem com ela mesma, criando no espaço da literatura uma suspensão de suas leis. No contato da literatura com a música e a dança, trata-se de fazer ressoar a palavra, fazê-la vibrar como no improviso do jazz, aberta ao erro e aos desvios da harmonia, e de conduzi-la no deslocamento de uma dança, livre do ordenamento sintático de seus passos.

  17. Comparação entre os bioenxertos de hidroxiapatita de cálcio e submucosa de intestino delgado porcino no preenchimento de defeitos ósseos criados em mandíbula de ratos Defect repair in rat mandible with hydroxyapatite cement comparad to small intestine submucosa

    Directory of Open Access Journals (Sweden)

    Andréa Thomaz Soccol

    2006-04-01

    Full Text Available OBJETIVO: O objetivo do presente estudo consiste em avaliar a regeneração óssea em defeito criado na mandíbula de ratos utilizando dois bioenxertos: hidroxiapatita de cálcio sintética e submucosa de intestino delgado porcina. FORMA DE ESTUDO: Experimental randomizado. MATERIAL E MÉTODO: Foram utilizados 24 ratos da linhagem Wisthar-Furth. Um defeito ósseo de 0,75cm x 1,5cm no corpo de cada hemimandíbula foi realizado em todos os animais com broca esférica de baixa rotação. Padronizou-se à esquerda o preenchimento do defeito ósseo, no grupo I com 15 microgramas de hidroxiapatita e no grupo II com preenchimento de submucosa de intestino delgado porcina (SID, e à direita o não-preenchimento serviu como controle. A eutanásia foi realizada no 40° dia de pós-operatório, após a qual se procederam as análises macroscópicas e histológicas das peças. RESULTADOS: O comprimento médio em milímetros das hemimandíbulas do grupo hidroxiapatita foi de 3,75, e o do grupo SID 3,03 e o do grupo controle foi de 2,63 (p: 0,0022. No grupo hidroxiapatita a neoformação óssea perfez uma área correspondente à 76,64% do total já no grupo SID 63,64% do total. CONCLUSÃO: Os resultados macroscópios e microscópicos foram superiores com a utilização do enxerto de hidroxiapatita quando comparado ao grupo submucosa de intestino delgado porcino. Entretanto os dois bioenxertos mostraram-se osteoindutores quando comparados ao controle.AIM: The aim of this study was to evaluate the bone formation in surgically created defects of rabbit mandibles by synthetic hydroxyapatite of calcium compared to small Intestine Submucosa. MATERIAL AND METHOD: 24 mices lineage Wisthar-Furth were used. A bony defect of 0,75 cm x 1,5 cm in mandibular ramus was accomplished in all animals. The hydroxyapatite implants were placed on the left hemimandiblein groupI, small Intestine submucosa in group II, and the right served as control. The euthanasia was accomplished

  18. Componentes de (covariância e parâmetros genéticos para caracteres produtivos à desmama de bezerros Angus criados no Estado do Rio Grande do Sul (Covariance components and genetic parameters for weaning production traits of Angus calves raised in the State of Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Fernando Flores Cardoso

    2001-02-01

    Full Text Available Foram estimados componentes de (covariância e parâmetros genéticos para peso ao nascer (PN, ganho do nascimento à desmama (G205 e escores de conformação (CD, precocidade de terminação (GD, musculatura (MD e tamanho (TD à desmama, utilizando-se registros de desmama de 40.915 bezerros Angus, criados no Estado do Rio Grande do Sul, sul do Brasil. Desses, 12.706 tinham pesagem ao nascer e 11.863, avaliação completa para escores visuais (EV. Os dados foram analisados por meio de um modelo animal, em análises uni e multivariadas, e os componentes de variância estimados pela máxima verossimilhança restrita. As herdabilidades aditivas diretas estimadas foram 0,29; 0,25; 0,18; 0,19; 0,19; e 0,21, respectivamente, para PN, G205, CD, GD, MD e TD. A herdabilidade materna para G205 foi 0,16 e a correlação entre efeito genético direto e materno, -0,51. Essa correlação negativa indica antagonismo entre esses efeitos e provocou decréscimo na herdabilidade total para G205, que foi 0,18. A contribuição do ambiente permanente da vaca para a variância fenotípica esteve entre um mínimo de 0,05 para PN e máximo de 0,12 para G205. A correlação genética entre PN e G205 foi --0,06, mostrando que estes caracteres são independentes geneticamente. As correlações genéticas encontradas entre G205 e EV foram entre 0,71 e 0,86 e de EV entre si, 0,58 a 0,91. Essas associações positivas entre os escores visuais e destes com o crescimento na fase pré-desmama favorecem a seleção conjunta destes caracteres, por meio de índices de seleção.(Co variance components and genetic parameters for birth weight (BW, adjusted weaning gain (AWG and for conformation (WC, precocity (WP, muscling (WM and size (WS scores at weaning were estimated, from records of 40,915 Angus calves, raised in the state of Rio Grande do Sul, southern Brazil. From that data, 12,706 had birth weight records and 11,863 had complete records for visual scores (VS. The data were

  19. Baicalein suppresses the androgen receptor (AR)-mediated prostate cancer progression via inhibiting the AR N-C dimerization and AR-coactivators interaction.

    Science.gov (United States)

    Xu, Defeng; Chen, Qiulu; Liu, Yalin; Wen, Xingqiao

    2017-12-01

    Androgen receptor (AR) plays a critical role in prostate cancer (PCa) development and progression. Androgen deprivation therapy with antiandrogens to reduce androgen biosynthesis or prevent androgens from binding to AR are widely used to suppress AR-mediated PCa growth. However, most of ADT may eventually fail with development of the castration resistance after 12-24 months. Here we found that a natural product baicalein can effectively suppress the PCa progression via targeting the androgen-induced AR transactivation with little effect to AR protein expression. PCa cells including LNCaP, CWR22Rv1, C4-2, PC-3, and DU145, were treated with baicalein and luciferase assay was used to evaluate their effect on the AR transactivation. Cell growth and IC 50 were determined by MTT assay after 48 hrs treatment. RT-PCR was used to evaluate the mRNA levels of AR target genes including PSA, TMPRSS2, and TMEPA1. Western blot was used to determine AR and PSA protein expression. The natural product of baicalein can selectively inhibit AR transactivation with little effect on the other nuclear receptors, including ERα, and GR. At a low concentration, 2.5 μM of baicalein effectively suppresses the growth of AR-positive PCa cells, and has little effect on AR-negative PCa cells. Mechanism dissection suggest that baicalein can suppress AR target genes (PSA, TMPRSS2, and TMEPA1) expression in both androgen responsive LNCaP cells and castration resistant CWR22Rv1 cells, that may involve the inhibiting the AR N/C dimerization and AR-coactivators interaction. Baicalein may be developed as an effective anti-AR therapy via its ability to inhibit AR transactivation and AR-mediated PCa cell growth.

  20. Ar-41 measurements and nuclear emergency preparedness

    International Nuclear Information System (INIS)

    Kunst, J.J.; Rodriguez, M.; Ugarte, R.; Vigile, R.S.; Boutet, L.I.; Jordan, O.D.; Hernandez, D.G.

    2010-01-01

    During the early phase of an emergency is necessary to confirm the release of radioactivity predictions made by the operator of the nuclear plant. In this context, it has begun measuring Ar-41 in the vicinity of a research reactor. Since the Ar-41 is produced in the reactor, it has been studied as a good way to validate the air dispersion model used in nuclear emergencies and to develop a method to improve the characterization of the release. For this latter purpose a pilot experiment was conducted to determine computational and experimental methods, the flux of 1.29 MeV of Ar-41 and compared to evaluate the accuracy of the assessments made. This paper describes meteorological forecasting systems used in the experiment, the estimate of the stability class and the concentration of nuclides using a calculation code developed by the ARN, as well as the methodology and equipment used for measurement in the field. (authors) [es

  1. Fatores ambientais sobre escores de avaliação visual à desmama em bezerros angus criados no Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Cardoso Fernando Flores

    2001-01-01

    Full Text Available Os objetivos deste estudo foram determinar a importância dos efeitos de idade da vaca (IV, sexo (S e idade do bezerro (ID, mês de nascimento (M e a interação entre idade da vaca e sexo (IV*S sobre escores de avaliação visual (EV para conformação (CD, precocidade (GD, musculatura (MD e tamanho (TD à desmama, de bovinos Angus, e estimar fatores de correção para esses efeitos. Foram utilizados 11.863 registros coletados pelo Programa de Melhoramento de Bovinos de Carne - PROMEBO, durante os anos de 1989 a 1997. Os dados foram analisados por meio do PROC MIXED do SAS. O modelo incluiu os efeitos de grupo de contemporâneos, M, IV, S, ID (linear e quadrático, IV*S e o efeito aleatório do touro. A partir das médias ajustadas de CD, GD, MD e TD, foram estimadas equações de regressão para M e IV*S. Os EV apresentaram resposta aos efeitos de IV, S e ID similar à do ganho de peso na fase de desmama. A idade do bezerro foi o fator responsável pelas maiores variações não-genéticas nos EV. Fatores de correção para ajuste de IV, ID e data juliana do nascimento foram propostos.

  2. AR(p) -based detrended fluctuation analysis

    Science.gov (United States)

    Alvarez-Ramirez, J.; Rodriguez, E.

    2018-07-01

    Autoregressive models are commonly used for modeling time-series from nature, economics and finance. This work explored simple autoregressive AR(p) models to remove long-term trends in detrended fluctuation analysis (DFA). Crude oil prices and bitcoin exchange rate were considered, with the former corresponding to a mature market and the latter to an emergent market. Results showed that AR(p) -based DFA performs similar to traditional DFA. However, the former DFA provides information on stability of long-term trends, which is valuable for understanding and quantifying the dynamics of complex time series from financial systems.

  3. African Journals Online: Curaçao

    African Journals Online (AJOL)

    ... Cambodia, Cameroon, Canada, Cayman Islands, Central African Republic, Chad, Chile, China, Colombia, Comoros, Congo, Democratic Republic, Congo, Republic, Costa Rica, Côte d'Ivoire, Croatia, Cuba, Curaçao, Cyprus, Czech Republic, Denmark, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, Arab Rep.

  4. Nemerteans from Curaçao

    NARCIS (Netherlands)

    Corrêa, Diva Diniz

    1963-01-01

    All species treated in this paper were collected by me between January and June 1962, during my stay at the “Caraïbisch Marien-Biologisch Instituut” (Caribbean Marine Biological Institute), Curaçao. I am deeply indebted to the Government of the Netherlands, which awarded me a grant enabling me to

  5. SIG aplicado ao Ensino de Geografia

    OpenAIRE

    Dornelles, Liane Maria Azevedo; Universidade do Estado do Rio de Janeiro - UERJ

    2009-01-01

    Este trabalho descreve as atividades desenvolvidas junto à disciplina eletiva SIG aplicado ao ensino de Geografia. Foram elaboradas aplicações ambientais para os Ensinos Fundamental e Médio, com auxílio dos programas VistaSAGA/UFRJ, SISPLAMTE 5as com GIS, SPRING/INPE e MapServer.

  6. Turbellaria from Curaçao

    NARCIS (Netherlands)

    Marcus, Ernst

    1960-01-01

    A study of the several fresh and brackish-water springs on Curaçao, carried out by Dr. P. WAGENAAR HUMMELINCK, revealed (a) the common occurrence on that island of Dugesia festai (Borelli 1898), a species which until then had only been known from the South American mainland (nearest find: Ecuador!),

  7. Estados Unidos: do Iraque ao Brasil

    Directory of Open Access Journals (Sweden)

    Virgílio Caixeta Arraes

    2010-12-01

    Full Text Available O presente artigo busca analisar os recentes temas recorrentes na política externa norte-americana, caracterizada pela “guerra contra o terror”, e seus impactos para a agenda a ser discutida na vindoura visita do presidente dos Estados Unidos, Geoge W. Bush, ao Brasil.

  8. Qualidade da carne de frangos de corte submetidos a dietas suplementadas com crômio, criados em diferentes temperaturas ambientais = Meat quality of broiler chicks submeted the supplemented diets with chromium and reared in differents enviromental temperatures

    Directory of Open Access Journals (Sweden)

    Alexandre Oba

    2007-04-01

    Full Text Available Foram realizados dois experimentos. O experimento um objetivou avaliar a composição da carne do peito de frangos alimentados com dietas suplementadas com crômio (0, 400, 800 e 1.200 μg Cr kg-1 complexado a levedura, criados sob diferentes condições de temperatura (quente, termoneutra e fria. O experimento dois objetivou avaliar a qualidade da carne do peito de frangos alimentados com dietas suplementadas com crômio (0 e 400 μg Cr kg-1, criados nas mesmas condições do experimento um e desossados em diferentes períodos (0, 5 e 24 horas. Os resultados mostram que as aves criadas em ambiente frio apresentaram a carne com menor porcentagem de matéria mineral e crômio e maior intensidade de vermelho, enquanto as aves criadas em temperatura termoneutra apresentaram carne com menor porcentagem de umidade, e as aves criadas em temperatura quente, carne com maior luminosidade. Já a suplementação de crômio não proporcionou qualquer efeito na composição e na qualidade de carne, enquanto que o aumento no período de desossa proporcionou um menor comprimento de sarcômero, força de cisalhamento e intensidade de amarelo, porém uma maior luminosidade.Two experiments were conducted being the objective of the first experiment to evaluate the the composition of breast meat of broiler chicks fed with diets supplemented with chromium yeast (0; 400; 800and 1,200 μg Cr kg-1 reared in different environmental temperatures (hot, thermoneutral and cold. The second experiment aimed to evaluate the quality of breast meat of broiler chicks fed with diets supplemented with chromium yeast (0 and 400 μg Cr kg-1, reared in different environmental temperatures (hot, thermoneutral and cold and deboned in different periods (0, 5 and 24 hours. The results showed that birds reared in cold environmental temperature showed meat with lower mineral matter percentage and chromium and higher values of redness, whereas the birds reared in thermoneutral environment

  9. 40Ar/36Ar in MORB glasses: Constraints on atmosphere and mantle evolution

    International Nuclear Information System (INIS)

    Sarda, P.; Staudacher, T.; Allegre, C.J.; Paris-7 Univ., 75

    1985-01-01

    Argon isotopic composition measurements of MORB glassy samples from the Pacific, Atlantic and Indian Oceans are performed. There is a very large scatter in the 40 Ar/ 36 Ar ratio, from 980 up to 24,400 for bulk rock analyses, which is mainly due to atmospheric contamination: Using the stepwise heating technique, very high ratios are obtained, from 15,000 up to 25,250 which is the highest 40 Ar/ 36 Ar ratio ever measured in MORB. We establish a negative correlation between the highest 40 Ar/ 36 Ar results from stepwise heating and 87 Sr/ 86 Sr ratios, which is perfectly consistent with a two-layered mantle structure. From both 40 Ar and 129 Xe MORB systematics a model is proposed for the kinetics of degassing: a very early and extensive burst, with a time constant of approx.= 4 My, is followed by a slower process of present day type, with a time constant of approx.= 0.5 Gy. The mean age of the atmosphere is so determined to be around 4.4 Gy. (orig./WB)

  10. Condicionamento de ar em salas de operação e controle de infecção - uma revisão

    Directory of Open Access Journals (Sweden)

    May Socorro Martinez Afonso

    2006-04-01

    Full Text Available Revisão bibliográfica, realizada junto aos bancos de dados MED LINE, LILACS, SCIELO, Ministério da Saúde e outros buscadores, com o objetivo de identificar os fatores que torna o ar condicionado fonte de contaminação ambiental. O ar é contaminado por partículas que transportam microrganismos. As fontes de partículas incluem pacientes e equipe cirúrgica. O controle da temperatura, umidade relativa, pressão, número de trocas de ar realizadas por hora, paramentação, tráfego, número de pessoas nas salas e manutenção e limpeza do sistema de ar condicionado dos centros cirúrgicos, são fatores importantes na redução do número de microrganismos no ambiente de sala de operação.

  11. Electron impact ionization of Ar8+

    International Nuclear Information System (INIS)

    Defrance, P.; Rachafi, S.; Jureta, J.; Meyer, F.; Chantrenne, S.

    1986-01-01

    Absolute electron impact ionization cross-sections have been measured for the Neon-like Ar 8+ in the energy range from below the threshold for the metastable state to 2500 eV. No contribution of metastable states is observed. The results are well reproduced by the Distorted Wave Born Approximation. 12 refs., 1 fig

  12. 75 FR 7637 - Arkansas Disaster #AR-00040

    Science.gov (United States)

    2010-02-22

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12031 and 12032] Arkansas Disaster AR-00040 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a notice of an Administrative declaration of a disaster for the State of Arkansas dated 02/10/2010. Incident: Severe Storms and...

  13. 76 FR 42155 - Arkansas Disaster #AR-00051

    Science.gov (United States)

    2011-07-18

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12680 and 12681] Arkansas Disaster AR-00051 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas (FEMA- 4000-DR), dated 07...

  14. 75 FR 7636 - Arkansas Disaster #AR-00042

    Science.gov (United States)

    2010-02-22

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12034 and 12035] Arkansas Disaster AR-00042 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas (FEMA-- 1872--DR), dated...

  15. 76 FR 42154 - Arkansas Disaster #AR-00050

    Science.gov (United States)

    2011-07-18

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12678 and 12679] Arkansas Disaster AR-00050 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-4000-DR), dated 07/08/2011. Incident: Severe...

  16. 75 FR 30872 - Arkansas Disaster # AR-00043

    Science.gov (United States)

    2010-06-02

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12196 and 12197] Arkansas Disaster AR-00043 AGENCY: U.S. Small Business Administration. ACTION: Notice SUMMARY: This is a notice of an Administrative declaration of a disaster for the State of Arkansas dated 05/26/2010. Incident: Severe storms, tornadoes and...

  17. 78 FR 39821 - Arkansas Disaster #AR-00064

    Science.gov (United States)

    2013-07-02

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 13637 and 13638] Arkansas Disaster AR-00064 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas (FEMA- 4124-DR), dated 06...

  18. 76 FR 27140 - Arkansas Disaster # AR-00049

    Science.gov (United States)

    2011-05-10

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas (FEMA- 1975-DR), dated 05...

  19. 78 FR 9448 - Arkansas Disaster #AR-00061

    Science.gov (United States)

    2013-02-08

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 13473 and 13474] Arkansas Disaster AR-00061 AGENCY: U.S. Small Business Administration. ACTION: Notice SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas (FEMA- 4100-DR), dated 01...

  20. 76 FR 27139 - Arkansas Disaster #AR-00048

    Science.gov (United States)

    2011-05-10

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02/2011. Incident: Severe...

  1. "ARS 01", perspektiivide avamine / Helen Kivisoo

    Index Scriptorium Estoniae

    Kivisoo, Helen

    2001-01-01

    30. IX 2001-20. I 2002 Kiasmas kuuendat korda toimuvast rahvusvahelisest näitusest "ARS", kus Eestist osaleb Marko Mäetamm. Kuraatorid Tuula Arkio, Maaretta Jaukkuri, Patrik Nyberg, Jari-Pekka Vanhala. Teemaks "kolmas ruum". Näituse kajastamisest.

  2. Hazard evaluation for 244-AR vault facility

    International Nuclear Information System (INIS)

    BRAUN, D.J.

    1999-01-01

    This document presents the results of a hazard identification and evaluation performed on the 244-AR Vault Facility to close a USQ (USQ No. TF-98-0785, Potential Inadequacy in Authorization Basis (PIAB): To Evaluate Miscellaneous Facilities Listed in HNF-2503 And Not Addressed In The TWRS Authorization Basis) that was generated as part of an evaluation of inactive TWRS facilities

  3. A compilation of {sup 40}Ar-{sup 39} and K-Ar ages: report 25

    Energy Technology Data Exchange (ETDEWEB)

    Hunt, P A [Geological Survey of Canada, Ottawa, ON (Canada); Roddick, J C

    1997-12-31

    Twenty-three {sup 40}Ar-{sup 39}Ar age determinations (including two potassium-argon analyses) carried out by the Geological Survey of Canada are reported. Each age determination is accompanied by a description of the rock and mineral concentrate used; brief interpretative comments regarding the geological significance of each age are also provided where possible. The experimental procedures employed are described in outline. An index of all Geological Survey of Canada K-Ar age determinations published in this format has been prepared using NTS quadrangles as the primary reference. (author). 6 refs., 2 tabs., 1 fig.

  4. A compilation of 40Ar-39 and K-Ar ages: report 25

    International Nuclear Information System (INIS)

    Hunt, P.A.; Roddick, J.C.

    1996-01-01

    Twenty-three 40 Ar- 39 Ar age determinations (including two potassium-argon analyses) carried out by the Geological Survey of Canada are reported. Each age determination is accompanied by a description of the rock and mineral concentrate used; brief interpretative comments regarding the geological significance of each age are also provided where possible. The experimental procedures employed are described in outline. An index of all Geological Survey of Canada K-Ar age determinations published in this format has been prepared using NTS quadrangles as the primary reference. (author). 6 refs., 2 tabs., 1 fig

  5. The ChArMEx database

    Science.gov (United States)

    Ferré, Hélène; Belmahfoud, Nizar; Boichard, Jean-Luc; Brissebrat, Guillaume; Cloché, Sophie; Descloitres, Jacques; Fleury, Laurence; Focsa, Loredana; Henriot, Nicolas; Mière, Arnaud; Ramage, Karim; Vermeulen, Anne; Boulanger, Damien

    2015-04-01

    The Chemistry-Aerosol Mediterranean Experiment (ChArMEx, http://charmex.lsce.ipsl.fr/) aims at a scientific assessment of the present and future state of the atmospheric environment in the Mediterranean Basin, and of its impacts on the regional climate, air quality, and marine biogeochemistry. The project includes long term monitoring of environmental parameters , intensive field campaigns, use of satellite data and modelling studies. Therefore ChARMEx scientists produce and need to access a wide diversity of data. In this context, the objective of the database task is to organize data management, distribution system and services, such as facilitating the exchange of information and stimulating the collaboration between researchers within the ChArMEx community, and beyond. The database relies on a strong collaboration between ICARE, IPSL and OMP data centers and has been set up in the framework of the Mediterranean Integrated Studies at Regional And Locals Scales (MISTRALS) program data portal. ChArMEx data, either produced or used by the project, are documented and accessible through the database website: http://mistrals.sedoo.fr/ChArMEx. The website offers the usual but user-friendly functionalities: data catalog, user registration procedure, search tool to select and access data... The metadata (data description) are standardized, and comply with international standards (ISO 19115-19139; INSPIRE European Directive; Global Change Master Directory Thesaurus). A Digital Object Identifier (DOI) assignement procedure allows to automatically register the datasets, in order to make them easier to access, cite, reuse and verify. At present, the ChArMEx database contains about 120 datasets, including more than 80 in situ datasets (2012, 2013 and 2014 summer campaigns, background monitoring station of Ersa...), 25 model output sets (dust model intercomparison, MEDCORDEX scenarios...), a high resolution emission inventory over the Mediterranean... Many in situ datasets

  6. VLA radio observations of AR Scorpii

    Science.gov (United States)

    Stanway, E. R.; Marsh, T. R.; Chote, P.; Gänsicke, B. T.; Steeghs, D.; Wheatley, P. J.

    2018-03-01

    Aims: AR Scorpii is unique amongst known white dwarf binaries in showing powerful pulsations extending to radio frequencies. Here we aim to investigate the multi-frequency radio emission of AR Sco in detail, in order to constrain its origin and emission mechanisms. Methods: We present interferometric radio frequency imaging of AR Sco at 1.5, 5 and 9 GHz, analysing the total flux and polarization behaviour of this source at high time resolution (10, 3 and 3 s), across a full 3.6 h orbital period in each band. Results: We find strong modulation of the radio flux on the orbital period and the orbital sideband of the white dwarf's spin period (also known as the "beat" period). This indicates that, like the optical flux, the radio flux arises predominantly from on or near the inner surface of the M-dwarf companion star. The beat-phase pulsations of AR Sco decrease in strength with decreasing frequency. They are strongest at 9 GHz and at an orbital phase 0.5. Unlike the optical emission from this source, radio emission from AR Sco shows weak linear polarization but very strong circular polarization, reaching 30% at an orbital phase 0.8. We infer the probable existence of a non-relativistic cyclotron emission component, which dominates at low radio frequencies. Given the required magnetic fields, this also likely arises from on or near the M-dwarf. A table of the flux time series is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/611/A66

  7. Uso da geoestatística na avaliação de variáveis ambientais em galpão de suínos criados em sistema "wean to finish" na fase de terminação

    OpenAIRE

    Medeiros, Brenda B. L.; Moura, Daniella J. de; Massari, Juliana M.; Curi, Thayla M. R. de C.; Maia, Ana Paula de A.

    2014-01-01

    O "wean to finish" é um sistema de criação de suínos que ainda é novo no Brasil, e não existem muitos estudos a respeito do ambiente onde estes animais são criados. Assim, o objetivo deste trabalho foi avaliar o ambiente térmico e aéreo por meio da técnica da geoestatística em galpão de suínos criados no sistema "wean to finish", na fase de terminação, nos horários das 09h, 12h e 15h. A variabilidade dos atributos foi baseada na estatística descritiva dos dados de temperatura, umidade relativ...

  8. Acidentes com material biológico relacionados ao trabalho: análise de uma abordagem institucional

    Directory of Open Access Journals (Sweden)

    Ana Isabel Dias da Silva

    Full Text Available RESUMO OBJETIVO: analisar o perfil de relatórios, instrumentos de registros e fluxos de tratamento, notificações, acompanhamentos, profilaxias e encaminhamentos devidos a acidentes causados por material perfurocortante em trabalhadores de saúde em uma instituição de saúde pública. Métodos: a coleta de dados usou um questionário semiestruturado aplicado aos profissionais responsáveis pelos registros de acidentes e avaliou os formulários utilizados em três setores da instituição de estudo. RESULTADOS: foram analisados 134 registros de acidentes biológicos. Quando comparamos os registros da instituição com os 50 registrados no mesmo período pelo banco de dados da Secretaria Municipal de Saúde do Rio de Janeiro, apenas 11 casos foram concordantes. Também identificamos falta de padronização nos formulários utilizados, fluxos diferentes e falta de registros de investigações dos casos, além de ausência de acompanhamento do desfecho dos acidentes. CONCLUSÃO: constataram-se subnotificação e discordância entre as fontes. Um formulário de registro para acidentes biológicos foi elaborado para informações de notificação e investigações, bem como criado um programa para monitorar acidentes causados por material perfurocortante, visando melhorar a vigilância de saúde dos trabalhadores da instituição.

  9. /sup 40/Ar//sup 39/Ar and K-Ar dating of altered glassy volcanic rocks: the Dabi Volcanics, P. N. G

    Energy Technology Data Exchange (ETDEWEB)

    Walker, D.A. (Australian National Univ., Canberra. Dept. of Geology); McDougall, I. (Australian National Univ., Canberra. Research School of Earth Sciences)

    1982-11-01

    K-Ar and /sup 40/Ar//sup 39/Ar ages have been determined for altered submarine tholeiitic and boninite (high-Mg andesite) lavas from the Dabi Volcanics, Cape Vogel Peninsula, Papua New Guinea. /sup 40/Ar//sup 39/Ar whole rock total fusion and plateau ages identify a Late Paleocene age for the tholeiitic lavas (58.9 +- 1.1 Ma), and also for the boninitic lavas (58.8 +- 0.8 Ma). Apparent K-Ar ages for the same samples range from 27.2 +- 0.7 to 63.9 +- 4.5 Ma, and young K-Ar ages for glassy boninites are probably due to variable radiogenic /sup 40/Ar(/sup 40/Ar*) loss. These new ages effectively reconcile previously ambiguous age data for the Dabi Volcanics, and indicate contemporaneous tholeiitic and boninitic volcanism occurring in southeast PNG during the Late Paleocene. Smectites, developed as alteration products after glass in oceanic lavas commonly do not retain /sup 39/Ar during or subsequent to irradiation, but in some cases may contain /sup 40/Ar*. The results are discussed.

  10. 40Ar/39Ar and K-Ar dating of altered glassy volcanic rocks: the Dabi Volcanics, P.N.G

    International Nuclear Information System (INIS)

    Walker, D.A.; McDougall, I.

    1982-01-01

    K-Ar and 40 Ar/ 39 Ar ages have been determined for altered submarine tholeiitic and boninite (high-Mg andesite) lavas from the Dabi Volcanics, Cape Vogel Peninsula, Papua New Guinea. 40 Ar/ 39 Ar whole rock total fusion and plateau ages identify a Late Paleocene age for the tholeiitic lavas (58.9 +- 1.1 Ma), and also for the boninitic lavas (58.8 +- 0.8 Ma). Apparent K-Ar ages for the same samples range from 27.2 +- 0.7 to 63.9 +- 4.5 Ma, and young K-Ar ages for glassy boninites are probably due to variable radiogenic 40 Ar( 40 Ar*) loss. These new ages effectively reconcile previously ambiguous age data for the Dabi Volcanics, and indicate contemporaneous tholeiitic and boninitic volcanism occurring in southeast PNG during the Late Paleocene. Smectites, developed as alteration products after glass in oceanic lavas commonly do not retain 39 Ar during or subsequent to irradiation, but in some cases may contain 40 Ar*. The results are discussed. (author)

  11. A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine

    DEFF Research Database (Denmark)

    Rivera, Tiffany; Storey, Michael; Zeeden, Christian

    2011-01-01

    Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the Fish Canyon sanidine (FCs) neutron fluence...... sanidine age of 0.7674±0.0022 Ma (2σ, external errors) is indistinguishable from the ID-TIMS U/Pb zircon age (0.7671±0.0019 Ma). The consistency between the astronomically calibrated 40Ar/39Ar sanidine age and U/Pb zircon age for this Quaternary unit suggests that agreement between these two radio-isotopic...... dating techniques is now achievable at better than±0.3% (2σ) in the youngest part of geologic time (

  12. Tecnogénesis. La construcción técnica de las ecologías humanas (2 Volúmenes (Tomás Sánchez-Criado, Ed.

    Directory of Open Access Journals (Sweden)

    Pablo Santoro

    2009-05-01

    Full Text Available De ser necesaria una aproximación radicalmente reduccionista a un trabajo tan poliédrico, creo que podría resumirse parte del mensaje de Tecnogénesis. La construcción técnica de las ecologías humanas, la ambiciosa obra colectiva editada por Tomás Sánchez Criado, en dos de sus comienzos. El primero es el que abre el breve y hermoso preámbulo escrito por Florentino Blanco: una reflexión, al hilo de la asistencia del autor a un concierto de música vocal contemporánea, sobre la profunda modificación de la gramática musical clásica en la experimentación actual y sobre la confusión cognitiva y emocional a la que esta destrucción de los códigos acostumbrados arroja al espectador.

  13. 40Ar-39Ar age studies for tectonics of the Gondwana land

    International Nuclear Information System (INIS)

    Takigami, Yutaka; Sugiura, Naoji.

    1997-01-01

    40 Ar- 39 Ar age studies have been performed for samples from Antarctica and India which were parts of the Gondwana land at Mesozoic and Paleozoic time in order to investigate their thermal history and tectonic movement. From the both areas, ages of about 500 Ma which have been considered to be the age of Pan-African Orogeny were obtained, which represents that this thermal event spread widely over the Gondwana land. (author)

  14. Single grains, thermal histories, and the 40Ar/39Ar method

    International Nuclear Information System (INIS)

    Wright, Norrie

    1989-01-01

    A key part in unraveling the history of the physical evolution of the earth is knowledge of the earth's thermal history. 40 Ar/ 39 Ar step heating of mineral samples provides a means of defining a local thermal history. to do this accurately the challenge is to extract meaningful diffusion parameters from a mineral's Arrhenius plot. In the case of biotite single grains, where the laboratory release of argon is a complex process, this can be a difficult task. (12 refs., 5 figs.)

  15. ^<40>Ar-^<39>Ar Age Studies for Tectonics of the Gondwana Land

    OpenAIRE

    Takigami, Yutaka; Sugiura, Naoji

    1997-01-01

    ^Ar-^Ar age studies have been performed for samples from Antarctica and India which were parts of the Gondwana land at Mesozoic and Paleozoic time in order to investigate their thermal history and tectonic movement. From the both areas, ages of about 500 Ma which have been considered to be the age of Pan-African Orogeny were obtained, which represents that this thermal event spread widely over the Gondwana land.

  16. ENSAIO: HOMENAGEM AO PROFESSOR REINIER ROZESTRATEN

    Directory of Open Access Journals (Sweden)

    Antonio C. R. Tupinambá

    2014-02-01

    Full Text Available Trata-se de uma homenagem póstuma ao Professor Doutor Reinier Rozestraten. O texto apresenta, suscintamente, o percurso acadêmico do nomeado professor, em especial a sua passagem pela Psicologia do Trânsito. Paralelamente discorre sobre sua principal obra na área, que, de certo modo introduz o discurso psicológico sobre o comportamento de trânsito em perspectiva nacional, juntamente com sua preocupação em imprimir um caráter científico ao tema e introduzi-lo no contexto da academia e na sociedade em perspectivas teórica e prática. A obra escolhida é considerada um marco para o estabelecimento teórico da disciplina da psicologia do trânsito no Brasil. A homenagem foi originalmente escrita por ocasião dos cinco anos de falecimento do professor Reinier.

  17. The ChArMEx database

    Science.gov (United States)

    Ferré, Hélène; Descloitres, Jacques; Fleury, Laurence; Boichard, Jean-Luc; Brissebrat, Guillaume; Focsa, Loredana; Henriot, Nicolas; Mastrorillo, Laurence; Mière, Arnaud; Vermeulen, Anne

    2013-04-01

    The Chemistry-Aerosol Mediterranean Experiment (ChArMEx, http://charmex.lsce.ipsl.fr/) aims at a scientific assessment of the present and future state of the atmospheric environment in the Mediterranean Basin, and of its impacts on the regional climate, air quality, and marine biogeochemistry. The project includes long term monitoring of environmental parameters, intensive field campaigns, use of satellite data and modelling studies. Therefore ChARMEx scientists produce and need to access a wide diversity of data. In this context, the objective of the database task is to organize data management, distribution system and services such as facilitating the exchange of information and stimulating the collaboration between researchers within the ChArMEx community, and beyond. The database relies on a strong collaboration between OMP and ICARE data centres and falls within the scope of the Mediterranean Integrated Studies at Regional And Locals Scales (MISTRALS) program data portal. All the data produced by or of interest for the ChArMEx community will be documented in the data catalogue and accessible through the database website: http://mistrals.sedoo.fr/ChArMEx. The database website offers different tools: - A registration procedure which enables any scientist to accept the data policy and apply for a user database account. - Forms to document observations or products that will be provided to the database in compliance with metadata international standards (ISO 19115-19139; INSPIRE; Global Change Master Directory Thesaurus). - A search tool to browse the catalogue using thematic, geographic and/or temporal criteria. - Sorted lists of the datasets by thematic keywords, by measured parameters, by instruments or by platform type. - A shopping-cart web interface to order in situ data files. At present datasets from the background monitoring station of Ersa, Cape Corsica and from the 2012 ChArMEx pre-campaign are available. - A user-friendly access to satellite products

  18. Robo-AO M Dwarf Multiplicity Survey

    Science.gov (United States)

    Lamman, Claire; Baranec, Christoph; Berta-Thompson, Zachory K.; Law, Nicholas M.; Ziegler, Carl; Schonhut-Stasik, Jessica

    2018-06-01

    We analyzed close to 7,000 observations from Robo-AO’s field M dwarf survey taken on the 2.1m Kitt Peak telescope. Results will help determine the total multiplicity fraction and multiplicity functions of M dwarfs, which are crucial steps towards understanding their evolution and formation mechanics. Through its robotic, laser-guided, and automated system, the Robo-AO instrument has yielded the largest adaptive-optics M dwarf survey to date. I developed a graphical user interface to quickly analyze this data. Initial data analysis included assessing data quality, checking the result from Robo-AO’s automatic reduction pipeline, and determining existence as well as the relative position of companions through a visual inspection. This program can be applied to other datasets and was successfully tested by re-analyzing observations from a separate Robo-AO survey. After a conservative initial cut for quality, over 350 companions were found within 4” of a primary star out of 2,746 high quality Robo-AO M dwarf observations, including four triple systems. Further observations were done with the Keck II telescope by using its NIRC2 imager to follow up on ten select targets for the existence and physical association of companions. Future research will yield insights into low-mass stellar formation and provide a database of nearby M dwarf multiples that will potentially assist ongoing and future surveys for planets around these stars, such as the NASA TESS mission.

  19. BIOMETRY OF PACA NEWBORNS BRED IN CAPTIVITY(AGOUTI PACA, LINNAEUS, 1766 NOTA CIENTÍFICA: BIOMETRIA DOS NEONATOS DE PACA CRIADOS EM CATIVEIRO (AGOUTI PACA, LINNAEUS, 1766

    Directory of Open Access Journals (Sweden)

    Júlio Carlos Canola

    2007-12-01

    Full Text Available

    Biometry provides important data on weight and length of wild animal newborns. After ultrasound pregnancy detection, 22 female pacas were separated in individual bails and kept until weaning of newborns. Newborns were measured with a metric tape (between the tips of the muzzle rostrally and the tail distally and weighted in a digital weight scale. Considering males and females, the average newborn length (average length ± standard deviation was 33.37 ± 0.57cm. Among males, the average weight was 33.30 ± 0.52 cm and among females 33.45 ± 0.62cm. Considering males and females, newborns weighted (average weight ± standard deviation 741.14 ± 51.23g. Among males, average weight was 717.75 ± 49.06g and among females 764.53 ± 53.40g. Female newborns are higher and heavier than males, but averages of weight and length of males and females did not differ themselves by the Tukey test (P<0.05.

    Key-words: Agouti paca, biometry, newborns.

    A biometria proporciona dados importantes no peso e comprimento de neonatos de animais selvagens. Após detecção ultra-sonográfica da prenhez, 22 pacas fêmeas foram separadas em baias individuais e mantidas até o desmame dos filhotes. Os neonatos eram medidos com uma fita métrica flexível (entre as extremidades do focinho e da caudal e então pesados em balança digital de precisão. Considerando-se machos e fêmeas, o comprimento dos neonatos (comprimento ± desvio padrão foi 33,37 ± 0,57 cm. Entre os machos, o comprimento médio foi 33,30 ± 0,52 cm e entre as fêmeas foi de 33,45 ± 0,62 cm. Em relação ao peso e considerando-se machos e fêmeas, os neonatos pesavam (peso ± desvio padrão 741,14 ± 51,23g. Entre os machos, o peso médio foi 717,75 ± 49,06g e entre as fêmeas 764,53 ± 53,40g. Os neonatos fêmeas são maiores e mais pesados que os neonatos machos de paca, mas as médias de peso e de comprimento de machos e fêmeas n

  20. Spectroscopic analysis of visible and near UV light emitted by Ar7+ and Ar6+ ions produced in Ar8+-He and Ar8+-H2 collisions at 120 keV

    International Nuclear Information System (INIS)

    Boduch, P.; Chantepie, M.; Hennecart, D.; Husson, X.; Kucal, H.; Lecler, D.; Stolterfoht, N.; Druetta, M.; Fawcett, B.; Wilson, M.

    1992-01-01

    A spectroscopic analysis of light emitted in the 2000-6000A wavelength range by Ar 7+ and Ar 6+ ions produced in Ar 8+ -He and Ar 8+ -H 2 collisions at 120 keV is performed. Well resolved fine structure components of 5s-5p and 5p-5d transitions in Ar VIII following single electron capture are precisely measured. Predominant lines due to double electron capture are observed. In particular, strong lines observed both in Ar 8+ -He and Ar 8+ -H 2 collisions are attributed to Ryberg transitions 3snl-3sn'l' in Ar VII. Attempts at identifications are made for the transition 3dnl-3dn'l' (n=4, 5) with the help of ab initio calculations. Photon emission cross sections for individual lines are determined from the measured data. (orig.)

  1. Emergency preparedness with Ar-41 measurement

    International Nuclear Information System (INIS)

    Kunst, Juan J.; Rodriguez, Monica; Ugarte, Ricardo; Vigile, Sebastian; Boutet, Luis; Jordan, Osvaldo; Hernandez, Daniel

    2008-01-01

    Full text: The Nuclear Regulatory Authority (ARN) of Argentina is training their intervention group in the forecast of radiological consequences in case of a radiological or nuclear accident. In this context it has begun the measurement of Ar-41 near the research reactor RA3. It is well known the Ar-41 production inside research reactor, and it has been studied like a good mean to validate atmosphere dispersion model occurrence, or to develop method to improve the estimation of the characteristic of the emission. The measurements were made in two laboratories of ARN, Gamma measurement Laboratory, and CTC (Total Body Counter) Laboratory near the research reactor RA3. The emission of Ar-41 were determined by Measurements Group of Environmental Control Division inside the research reactor. The laboratories are at SE and ESE direction from the reactor. After the passage of a cold front, the wind flown from SE, in this situation and if the reactor is operating we could detect the presence of Ar-41 in the environment. This meteorological situation can be forecast by information submitted by National Meteorological Service of Argentina (SMN) in a meteograma. To correlate and evaluate the concentration in this laboratory, first it was determined the direction and persistence of wind in the site using the forecast of the National Meteorological Service (SMN) of Argentina to establish when the detectors were irradiated, during the radiological measurements, the real time wind direction an velocities measurement were did, with a site meteorological tower. With this information and cloudiness we determined de stability class and concentration. To determine concentration we used the code Hotspot and our code SEDA developed in ARN. In this paper are present the calibration of GeH detectors, and the location of them. We present several measurements did in this experience. We analyze the capacity developed by our teams to predict changes in wind direction and concentrations

  2. K/Ar dating of diagenetic illites

    International Nuclear Information System (INIS)

    Mizusaki, A.M.P.; Anjos, S.M.C. dos; Costa, M.G.F. da; Silva, O.B. da; Kawashita, K.

    1990-01-01

    Ascertaining the potassium/argon (K/Ar) age of diagenetic illites yields important information for hydrocarbon exploration since the growth of this mineral in the pores of sandstone reservoir and oil migration are interlinked events in the diagenetic evolution of rocks. Illite growth ceases as soon as hydrocarbons completely fill in rock pores, displacing interstitial water. By providing an estimate of the period when the illite formed, K/Ar dating can indirectly tells us when hydrocarbons entered the reservoir. Samples of oil-saturated sandstones collected from Carboniferous reservoirs of the Solimoes Basin reveal a diagenetic evolution consisting predominantly of quartz, calcite, and illite overgrowths. In the present study, illite was mechanically separated by repeating a series of ultrasonic baths and ultrasonic probes followed by high-speed centrifuging. Resultant fractions were analyzed by X-ray diffractometry to measure the illite content of each sample. The separated illite material was found to be composed of illite and ordered mixed layer illite-smectite with 80% illite layers. Separated fractions were dated radiometrically by the K/Ar method. Preliminary results indicate an average age of some 200 m.y., which marks the end of the diagenetic development of the illites of this area. (author)

  3. Lifetime and spin measurements in 40Ar

    International Nuclear Information System (INIS)

    Southon, J.

    1976-01-01

    Lifetimes of levels in 40 Ar populated by the 40 Ar(p,p') reaction have been measured using the Doppler shift attenuation method with a p-γ coincidence technique. A solid argon target was used. The lifetimes determined were (in psec.): 1461 keV level, 1.95 +- 0.15; 2121 keV, >25; 2524 keV, 0.53 +- 0.06; 2893 keV, 4.4 [+2.6,-1.3]; 3208 keV, 0.27. A comprehensive set of branching ratios was also derived and the spins and parities of the 3208 and 4481 keV states were determined to be 2 + and 1 +- respectively. Some of these results suggest that 2 particle -2 hole and 4 particle - 4 hole components are strongly mixed in the low-lying positive parity states in a manner similar to the 2 particle and 4 particle - 2 hole mixing that occurs in 42 Ca. An additional lifetime measurement for the recently discovered high spin state at 3464 keV was carried out using direct electronic timing. The level was excited by the 37 Cl(α,p) reaction and was found to have a lifetime of 1.00 +- 0.03 nsec, which taken together with other evidence indicates that its spin and parity are 6 + . The E2 transition strengths of the 40 Ar 6 + - 4 + - 2 + - 0 + cascade can be simply interpreted in terms of a weak coupling model. (author)

  4. 40Ar/ 39Ar ages and paleomagnetism of São Miguel lavas, Azores

    Science.gov (United States)

    Johnson, Catherine L.; Wijbrans, Jan R.; Constable, Catherine G.; Gee, Jeff; Staudigel, Hubert; Tauxe, Lisa; Forjaz, Victor-H.; Salgueiro, Mário

    1998-08-01

    We present new 40Ar/ 39Ar ages and paleomagnetic data for São Miguel island, Azores. Paleomagnetic samples were obtained for 34 flows and one dike; successful mean paleomagnetic directions were obtained for 28 of these 35 sites. 40Ar/ 39Ar age determinations on 12 flows from the Nordeste complex were attempted successfully: ages obtained are between 0.78 Ma and 0.88 Ma, in contrast to published K-Ar ages of 1 Ma to 4 Ma. Our radiometric ages are consistent with the reverse polarity paleomagnetic field directions, and indicate that the entire exposed part of the Nordeste complex is of a late Matuyama age. The duration of volcanism across São Miguel is significantly less than previously believed, which has important implications for regional melt generation processes, and temporal sampling of the geomagnetic field. Observed stable isotope and trace element trends across the island can be explained, at least in part, by communication between different magma source regions at depth. The 40Ar/ 39Ar ages indicate that our normal polarity paleomagnetic data sample at least 0.1 Myr (0-0.1 Ma) and up to 0.78 Myr (0-0.78 Ma) of paleosecular variation and our reverse polarity data sample approximately 0.1 Myr (0.78-0.88 Ma) of paleosecular variation. Our results demonstrate that precise radiometric dating of numerous flows sampled is essential to accurate inferences of long-term geomagnetic field behavior. Negative inclination anomalies are observed for both the normal and reverse polarity time-averaged field. Within the data uncertainties, normal and reverse polarity field directions are antipodal, but the reverse polarity field shows a significant deviation from a geocentric axial dipole direction.

  5. 78 FR 41838 - Establishment of Class E Airspace; Colt, AR

    Science.gov (United States)

    2013-07-12

    ...-1281; Airspace Docket No. 12-ASW-13] Establishment of Class E Airspace; Colt, AR AGENCY: Federal... at Colt, AR. Controlled airspace is necessary to accommodate new Area Navigation (RNAV) Standard... Federal Register a notice of proposed rulemaking (NPRM) to establish Class E airspace for the Colt, AR...

  6. 75 FR 29657 - Establishment of Class E Airspace; Marianna, AR

    Science.gov (United States)

    2010-05-27

    ...-1167; Airspace Docket No. 09-ASW-33] Establishment of Class E Airspace; Marianna, AR AGENCY: Federal... for Marianna, AR to accommodate Area Navigation (RNAV) Standard Instrument Approach Procedures (SIAPs) at Marianna/Lee County Airport--Steve Edwards Field, Marianna, AR. The FAA is taking this action to...

  7. 75 FR 68416 - Establishment of Class E Airspace; Berryville, AR

    Science.gov (United States)

    2010-11-08

    ...-0690; Airspace Docket No. 10-ASW-2] Establishment of Class E Airspace; Berryville, AR AGENCY: Federal... for Berryville, AR, to accommodate Area Navigation (RNAV) Standard Instrument Approach Procedures (SIAP) at Carroll County Airport, Berryville, AR. The FAA is taking this action to enhance the safety...

  8. 75 FR 12161 - Establishment of Class E Airspace; Marianna, AR

    Science.gov (United States)

    2010-03-15

    ...-1167; Airspace Docket No. 09-ASW-33] Establishment of Class E Airspace; Marianna, AR AGENCY: Federal... proposes to establish Class E airspace at Marianna/Lee County Airport-Steve Edwards Field, Marianna, AR, to... operations at Marianna/Lee County Airport-Steve Edwards Field, Marianna, AR. Controlled airspace is needed...

  9. 75 FR 29656 - Amendment of Class E Airspace; Magnolia, AR

    Science.gov (United States)

    2010-05-27

    ...-1179; Airspace Docket No. 09-ASW-35] Amendment of Class E Airspace; Magnolia, AR AGENCY: Federal... airspace for Magnolia, AR. Decommissioning of the Magnolia non-directional beacon (NDB) at Magnolia Municipal Airport, Magnolia, AR has made this action necessary to enhance the safety and management of...

  10. 75 FR 12162 - Class E Airspace; Manila, AR

    Science.gov (United States)

    2010-03-15

    ...-1184; Airspace Docket No. 09-ASW-39] Class E Airspace; Manila, AR AGENCY: Federal Aviation... Class E airspace at Manila, AR. Decommissioning of the Manila non-directional beacon (NDB) at Manila... instrument approach procedures at Manila Municipal Airport, Manila, AR. Airspace reconfiguration is necessary...

  11. 76 FR 73505 - Establishment of Class E Airspace; Nashville, AR

    Science.gov (United States)

    2011-11-29

    ...-0497; Airspace Docket No. 11-ASW-4] Establishment of Class E Airspace; Nashville, AR AGENCY: Federal... for Nashville, AR, to accommodate new Area Navigation (RNAV) Standard Instrument Approach Procedures... a notice of proposed rulemaking to amend Class E airspace for Nashville, AR, creating additional...

  12. 75 FR 29655 - Amendment of Class E Airspace; Batesville, AR

    Science.gov (United States)

    2010-05-27

    ...-1177; Airspace Docket No. 09-ASW-34] Amendment of Class E Airspace; Batesville, AR AGENCY: Federal... Batesville, AR. Decommissioning of the Independence County non-directional beacon (NDB) at Batesville Regional Airport, Batesville, AR, has made this action necessary to enhance the safety and management of...

  13. 75 FR 66300 - Amendment of Class E Airspace; Searcy, AR

    Science.gov (United States)

    2010-10-28

    ...-1182; Airspace Docket No. 09-ASW-37] Amendment of Class E Airspace; Searcy, AR AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: This action amends Class E airspace for Searcy, AR. Decommissioning of the Searcy non-directional beacon (NDB) at Searcy Municipal Airport, Searcy, AR, has made this...

  14. 75 FR 37291 - Amendment of Class E Airspace; Osceola, AR

    Science.gov (United States)

    2010-06-29

    ...-1183; Airspace Docket No. 09-ASW-38] Amendment of Class E Airspace; Osceola, AR AGENCY: Federal... Osceola, AR. Decommissioning of the Osceola non-directional beacon (NDB) at Osceola Municipal Airport has... rulemaking to amend Class E airspace for Osceola, AR, reconfiguring controlled airspace at Osceola Municipal...

  15. 75 FR 12163 - Class E Airspace; Mountain View, AR

    Science.gov (United States)

    2010-03-15

    ...-1181; Airspace Docket No. 09-ASW-36] Class E Airspace; Mountain View, AR AGENCY: Federal Aviation... Class E airspace at Mountain View, AR. Decommissioning of the Wilcox non-directional beacon (NDB) at... View, AR. Airspace reconfiguration is necessary due to the decommissioning of the Wilcox NDB and the...

  16. 75 FR 29654 - Amendment of Class E Airspace; Manila, AR

    Science.gov (United States)

    2010-05-27

    ...-1184; Airspace Docket No. 09-ASW-39] Amendment of Class E Airspace; Manila, AR AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: This action amends Class E airspace for Manila, AR. Decommissioning of the Manila non-directional beacon (NDB) at Manila Municipal Airport, Manila, AR has made this...

  17. 75 FR 12165 - Class E Airspace; Batesville, AR

    Science.gov (United States)

    2010-03-15

    ...-1177; Airspace Docket No. 09-ASW-34] Class E Airspace; Batesville, AR AGENCY: Federal Aviation... Class E airspace at Batesville, AR. Decommissioning of the Independence County non-directional beacon... for standard instrument approach procedures at Batesville Regional Airport, Batesville, AR. Airspace...

  18. NATOMICAL ASPECTS OF THE PLACENTA FROM ZEBU CATTLE RAISED IN THE ORIENTAL AMAZONIAN, BRAZIL ASPECTOS ANATÓMICOS DE LA PLACENTA DE ZEBUÍNOS CREADO EN EL AMAZÔNIA DEL ESTE ASPECTOS ANATÔMICOS DA PLACENTA DE ZEBUÍNOS CRIADOS NA AMAZÔNIA ORIENTAL, BRASIL.

    Directory of Open Access Journals (Sweden)

    Tânia Vasconcelos Cavalcante

    2009-04-01

    cuenta total de los placentônios un perno en cada estructura fue colocado individualmente , repitiendo el mismo procedimiento en ambos los cornos de los gestantes o no. Los resultados conseguidos para las 0 variables: la cantidad de los placentônios y la época de la gestación habían sido sometidas a la estadística del análisis. El total de placentônios encontrados en las 30 placentas estaba de 2651, con el promedio de 88.37 para la gestación. En el gestante uno del corno satisfecho 1602 placentônios, con el promedio de 53.40 para la placenta (60.45% y en el gestante 1048 del corno no satisfecho, con el promedio de 34.93 para la placenta (39.55%. Analizando el total de placentônios, en las diversas edades de los gestacionais, un aumento gradual en la cantidad de éstos se observa, no obstante esta correlación no es significativa estadístico (r=? 0,2. Uno concluye que la morfología de la placenta de los zebuínos creados en la región del este del Amazônia es similar de los zebuínos creados en otras regiones con diversas condiciones climáticas y circundantes, por lo tanto la placenta no se parece ser influenciada por tales factores. 

    O trabalho visa analisar as características anatômicas macroscópicas da placenta bovina, Bos taurus indicus, criados na região Oriental da Amazônia, com um perfil de rebanhos regionais mantidos nas condições ambientais e climáticas amazônicas. Coletaram-se úteros gravídicos em diferentes estágios de gestação (quatro a oito meses de vacas Zebu. Cada peça foi lavada em água corrente e seccionou-se o ligamento intercornual, para separação dos cornos uterinos.  Realizou-se uma secção dorsal ao longo da cérvix até o corpo do útero. As membranas fetais ficaram expostas e perfuradas, removendo-se os líquidos fetais e o feto

  19. 40Ar/39Ar and K-Ar age constraints on the timing of regional deformation, south coast of New South Wales, Lachlan Fold Belt: problems and implications

    International Nuclear Information System (INIS)

    Fergusson, C.L.; Phillips, D.

    2001-01-01

    Four slate samples from subduction complex rocks exposed on the south coast of New South Wales, south of Batemans Bay, were analysed by K-Ar and 40 Ar/ 39 Ar step-heating methods, One sample contains relatively abundant detrital muscovite flakes that are locally oblique to the regional cleavage in the rock, whereas the remaining samples appear to contain sparse detrital muscovite. Separates of detrital muscovite yielded plateau ages of 505 + 3 Ma and 513 + 3 Ma indicating that inheritance has not been eliminated by metamorphism and recrystallisation. Step-heating analyses of whole-rock chips from all four slate samples produced discordant apparent age spectra with 'saddle shapes' following young apparent ages at the lowest temperature increments. Elevated apparent ages associated with the highest temperature steps are attributed to the presence of variable quantities of detrital muscovite ( 40 Ar/ 39 Ar integrated ages of ca 455Ma, which are some 15-30 million years older than K-Ar ages for the same samples. These discrepancies suggest that the slates have also been affected by recoil loss/redistribution of 39 Ar, Ieading to anomalously old 40 Ar/ 39 Ar ages. Two other samples, from slaty tectonic melange and intensely cleaved slate, yielded average 40 Ar/ 39 Ar integrated ages of ca 424Ma, which are closer to associated mean K-Ar ages of 423 + 4Ma and 409 + 16Ma, respectively. Taking into account the potential influences of recoil loss/redistribution of 39 Ar and inheritance, the results from the latter samples suggest a maximum age of ca 440 Ma for deformation/metamorphism. The current results indicate that recoil and inheritance problems may also have affected whole-rock 40 Ar/ 39 Ar data reported from other regions of the Lachlan Fold Belt. Therefore, until these effects are adequately quantified, models for the evolution of the Lachlan Fold Belt, that are based on such whole-rock 40 Ar/ 39 Ar data, should be treated with caution. Copyright (2001) Geological

  20. The thermal history of the Lhasa Block, South Tibetan Plateau based on FTD and Ar-Ar dating

    CERN Document Server

    Yang, T F; Lo Chong Huah; Chung, S L; Tien, R L; Xu, R; Deng, W

    1999-01-01

    Twelve basement samples were collected from South Tibet Plateau for FTD and Ar-Ar analysis to demonstrate their uplifting history since Cenozoic era. The preliminary results from different minerals with different closure temperatures, including apatite and zircon for fission-track dating, and K-feldspar, biotite for Ar-Ar dating, show that at least four stages of thermal history can be recognized in the studied area.

  1. Histone demethylase JMJD1A promotes alternative splicing of AR variant 7 (AR-V7) in prostate cancer cells.

    Science.gov (United States)

    Fan, Lingling; Zhang, Fengbo; Xu, Songhui; Cui, Xiaolu; Hussain, Arif; Fazli, Ladan; Gleave, Martin; Dong, Xuesen; Qi, Jianfei

    2018-05-15

    Formation of the androgen receptor splicing variant 7 (AR-V7) is one of the major mechanisms by which resistance of prostate cancer to androgen deprivation therapy occurs. The histone demethylase JMJD1A (Jumonji domain containing 1A) functions as a key coactivator for AR by epigenetic regulation of H3K9 methylation marks. Here, we describe a role for JMJD1A in AR-V7 expression. While JMJD1A knockdown had no effect on full-length AR (AR-FL), it reduced AR-V7 levels in prostate cancer cells. Reexpression of AR-V7 in the JMJD1A-knockdown cells elevated expression of select AR targets and partially rescued prostate cancer cell growth in vitro and in vivo. The AR-V7 protein level correlated positively with JMJD1A in a subset of human prostate cancer specimens. Mechanistically, we found that JMJD1A promoted alternative splicing of AR-V7 through heterogeneous nuclear ribonucleoprotein F (HNRNPF), a splicing factor known to regulate exon inclusion. Knockdown of JMJD1A or HNRNPF inhibited splicing of AR-V7, but not AR-FL, in a minigene reporter assay. JMJD1A was found to interact with and promote the recruitment of HNRNPF to a cryptic exon 3b on AR pre-mRNA for the generation of AR-V7. Taken together, the role of JMJD1A in AR-FL coactivation and AR-V7 alternative splicing highlights JMJD1A as a potentially promising target for prostate cancer therapy.

  2. The thermal history of the Lhasa Block, South Tibetan Plateau based on FTD and Ar-Ar dating

    International Nuclear Information System (INIS)

    Yang, T.F.; Wang, J.R.; Lo, C.H.; Chung, S.L.; Tien, R.L.; Xu, R.; Deng, W.

    1999-01-01

    Twelve basement samples were collected from South Tibet Plateau for FTD and Ar-Ar analysis to demonstrate their uplifting history since Cenozoic era. The preliminary results from different minerals with different closure temperatures, including apatite and zircon for fission-track dating, and K-feldspar, biotite for Ar-Ar dating, show that at least four stages of thermal history can be recognized in the studied area

  3. Call for Development of New Mineral Standards for 40Ar/39Ar Dating

    Science.gov (United States)

    Deino, A. L.; Turrin, B. D.; Renne, P. R.; Hemming, S. R.

    2015-12-01

    Age determination via the 40Ar/39Ar dating method relies on the intercomparison of measured 40Ar*/39ArK ratios of geological unknowns with those of co-irradiated mineral standards. Good analytical procedure dictates that these ratios (and the evolution of the Ar ion beams underpinning them) be as similar as practical for the greatest accuracy. Unfortunately, throughout several intervals of the geological time scale this 'best practice' cannot be achieved with existing widely used standards. Only two internationally utilized sanidine standards are available for the middle to late Cenozoic: the Alder Creek Rhyolite sanidine (ACs), at ~1.2 Ma (Turrin et al., 1994; Nomade et al., 2005), and the Fish Canyon Tuff sanidine (FCs) at ~28.2 Ma (e.g., Kuiper et al., 2008; Renne et al, 2011). The situation is even worse throughout much of the rest of the Phanerozoic, as the next oldest standard in common use is the Hb3gr hornblende standard with an age of ~1.1 Ga (Turner, 1971; Jourdan et al., 2006). We propose, as a community effort, the development a set of standards covering the entire target range of high-precision 40Ar/39Ar dating, i.e. the Phanerozoic. Their ages would be stepped in a regular fashion with no more than approximately a factor of 3 between standards, such that in the worse case the 40Ar*/39Ar ratios of standards and unknown need differ by no more than a factor of two. While somewhat arbitrary, an approximately 3 X age progression allows the entire time scale to be covered by a manageable number of standards. Anchoring the progression in the widely used ACs, FCs, and Hb3gr (in bold, below) yields the following set of suggested standard ages: 0.4, 1.2, 3.3, 9.4, 28.2, 95, 320, and 1100 Ma. A suitable standard should be highly reproducible in age at the grain-to-grain and sub-grain levels, and highly radiogenic. The mineral should be abundant and easily separated from the host rock. These criteria may be most easily achieved by focusing on sanidine phenocrysts

  4. Application of quadrupole mass spectrometer to the 40Ar-39Ar geochronological study

    International Nuclear Information System (INIS)

    Takigami, Yutaka; Nishijima, Tadashi; Koike, Toshio; Okuma, Kouichi.

    1984-01-01

    A Quadrupole Mass Spectrometer (QMS) has commonly been used for qualitative analyses of gases in organic chemistry or for monitoring the vacuum conditions in industrial machines. No attempt has been made, however, to apply it to geochronological studies because of its disadvantages such as the difficulty in obtaining precise isotope ratios due to triangular peak shapes and poor reproducibility. On the other hand, there are advantages that a QMS is relatively inexpensive and gives a shorter scanning time for analysis compared with a sector type mass spectrometer. The latter characteristics is useful for 40 Ar/ 39 Ar geochronological studies, since it gives a lower background in the QMS and the possibility to obtain many more data from one sample in a limited time. In this study, we have tried to improve a commercial QMS at many parts, such as rf-generator, quadrupole, ionization chamber, source magnet, and so on, in order to meet the requirements to use it for geochronological studies. With the use of the improved QMS equipped with an on-line microcomputer, we could obtain Ar isotope data which are sufficiently precise for the 40 Ar/ 39 Ar geochronological studies. (author)

  5. A test of the 40Ar/39Ar age spectrum technique on some terrestrial materials

    Science.gov (United States)

    Lanphere, M.A.; Brent, Dalrymple G.

    1971-01-01

    40Ar/39Ar age spectra were determined for 10 terrestrial rock and mineral samples whose geologic history is known from independent evidence. The spectra for six mineral and whole rock samples, including biotite, feldspar, hornblende, muscovite, and granodiorite, that have experienced post-crystallization heating did not reveal the age of crystallization in any obvious way. Minima in the spectra, however, give reasonable maximum ages for reheating and high-temperature maxima can be interpreted as minimum crystallization ages. High-temperature ages of microcline and albite that have not been reheated are approximately 10% younger than the known crystallization age. Apparently there are no domains in these feldspars that have retained radiogenic 40Ar quantitatively. Spectra from two diabase samples that contain significant quantities of excess argon might mistakenly be interpreted as spectra from reheated samples and do not give the age of emplacement. The 40Ar/39Ar age spectrum technique may be a potentially valuable tool for the study of geologic areas with complex histories, but the interpretation of age spectra from terrestrial samples seems to be more difficult than suggested by some previous studies. ?? 1971.

  6. ROBO-AO M DWARF MULTIPLICITY SURVEY

    Science.gov (United States)

    Lamman, Claire; Berta-Thompson, Zachory; Baranec, Christoph; Law, Nicholas; Schonhut, Jessica

    2018-01-01

    We analyzed over 7,000 observations from Robo-AO’s field M dwarf survey taken on the 2.1m Kitt Peak telescope. Results will help determine the multiplicity fraction of M dwarfs as a function of primary mass, which is a crucial step towards understanding their evolution and formation mechanics. Through its robotic, laser-guided, and automated system, the Robo-AO instrument has yielded the largest adaptive-optics M dwarf survey to date. I developed a graphical user interface to quickly analyze this data. Initial data analysis included assessing data quality, checking the result from Robo-AO’s automatic reduction pipeline, and determining existence as well as the relative position of companions through a visual inspection. This program can be applied to other datasets and was successfully tested by re-analyzing observations from a separate Robo-AO survey. Following the preliminary results from this data analysis tool, further observations were done with the Keck II telescope by using its NIRC2 imager to follow up on ten select targets for the existence and physical association of companions. After a conservative initial cut for quality, 356 companions were found within 4” of a primary star out of 2,746 high quality Robo-AO M dwarf observations, including four triple systems. We will present a preliminary estimate for the multiplicity rate of wide M dwarf companions after accounting for observation limitations and the completeness of our search. Future research will yield insights into low-mass stellar formation and provide a database of nearby M dwarf multiples that will potentially assist ongoing and future surveys for planets around these stars, such as the NASA TESS mission.

  7. The celecoxib derivatives AR-12 and AR-14 induce autophagy and clear prion-infected cells from prions.

    Science.gov (United States)

    Abdulrahman, Basant A; Abdelaziz, Dalia; Thapa, Simrika; Lu, Li; Jain, Shubha; Gilch, Sabine; Proniuk, Stefan; Zukiwski, Alexander; Schatzl, Hermann M

    2017-12-14

    Prion diseases are fatal infectious neurodegenerative disorders that affect both humans and animals. The autocatalytic conversion of the cellular prion protein (PrP C ) into the pathologic isoform PrP Sc is a key feature in prion pathogenesis. AR-12 is an IND-approved derivative of celecoxib that demonstrated preclinical activity against several microbial diseases. Recently, AR-12 has been shown to facilitate clearance of misfolded proteins. The latter proposes AR-12 to be a potential therapeutic agent for neurodegenerative disorders. In this study, we investigated the role of AR-12 and its derivatives in controlling prion infection. We tested AR-12 in prion infected neuronal and non-neuronal cell lines. Immunoblotting and confocal microscopy results showed that AR-12 and its analogue AR-14 reduced PrP Sc levels after only 72 hours of treatment. Furthermore, infected cells were cured of PrP Sc after exposure of AR-12 or AR-14 for only two weeks. We partially attribute the influence of the AR compounds on prion propagation to autophagy stimulation, in line with our previous findings that drug-induced stimulation of autophagy has anti-prion effects in vitro and in vivo. Taken together, this study demonstrates that AR-12 and the AR-14 analogue are potential new therapeutic agents for prion diseases and possibly protein misfolding disorders involving prion-like mechanisms.

  8. Legacy K/Ar and 40Ar/39Ar geochronologic data from the Alaska-Aleutian Range batholith of south-central Alaska

    Science.gov (United States)

    Koeneman, Lisa L.; Wilson, Frederic H.

    2018-04-06

    Sample descriptions and analytical data for more than 200 K/Ar and 40Ar/39Ar analyses from rocks of the Alaska-Aleutian Range batholith of south-central Alaska are reported here. Samples were collected over a period of 20 years by Bruce R. Reed and Marvin A. Lanphere (both U.S. Geological Survey) as part of their studies of the batholith.

  9. Hepatotoxicidade associada ao uso de esteroides anabolizantes

    OpenAIRE

    Mónica Brinquinho; Ana Andresa Sousa; Janine Resende; João Valente

    2017-01-01

    O consumo de esteroides androgénicos anabolizantes tem vindo a aumentar no meio desportivo amador, sendo de fácil acesso apesar de se tratarem de substâncias proibidas. Estão descritos múltiplos efeitos laterais, sendo a hepatotoxicidade uma das mais reportadas. Apresentam-se dois casos clínicos representativos da lesão hepática associada ao consumo de esteroides anabolizantes. Ambos evidenciaram morbilidade significativa, embora nenhum deles tenha evoluído para falência hepática. Os autores ...

  10. Ar + NO microwave plasmas for Escherichia coli sterilization

    Energy Technology Data Exchange (ETDEWEB)

    Hueso, Jose L; Rico, Victor J; Cotrino, Jose; Gonzalez-Elipe, Agustin R [Instituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla, Centro de Investigaciones Cientificas Isla de la Cartuja, Avda. Americo Vespucio 49, 41092 Sevilla (Spain); Frias, Jose E [Instituto de BioquImica Vegetal y FotosIntesis (IBVF-CSIC). Centro de Investigaciones CientIficas Isla de la Cartuja. Avda Americo Vespucio, 49, 41092 Sevilla (Spain)], E-mail: jhueso@icmse.csic.es

    2008-05-07

    Ar + NO microwave discharges are used for sterilization and the results are compared with additional experiments with Ar, O{sub 2} and N{sub 2}-O{sub 2} plasma mixtures. The NO{sup *} species produced in the Ar-NO mixtures remain up to long distances from the source, thus improving the sterilization efficiency of the process. E. coli individuals exposed to the Ar + NO plasma undergo morphological damage and cell lysis. Combined effects of etching (by O{sup *} and Ar{sup *} species) and UV radiation (from deactivation of NO{sup *} species) are responsible for the higher activity found for this plasma mixture. (fast track communication)

  11. Ar + NO microwave plasmas for Escherichia coli sterilization

    International Nuclear Information System (INIS)

    Hueso, Jose L; Rico, Victor J; Cotrino, Jose; Gonzalez-Elipe, Agustin R; Frias, Jose E

    2008-01-01

    Ar + NO microwave discharges are used for sterilization and the results are compared with additional experiments with Ar, O 2 and N 2 -O 2 plasma mixtures. The NO * species produced in the Ar-NO mixtures remain up to long distances from the source, thus improving the sterilization efficiency of the process. E. coli individuals exposed to the Ar + NO plasma undergo morphological damage and cell lysis. Combined effects of etching (by O * and Ar * species) and UV radiation (from deactivation of NO * species) are responsible for the higher activity found for this plasma mixture. (fast track communication)

  12. Hydroxyapatite granules used in the obliteration of mastoid cavities in rats Utilização de hidroxiapatita de cálcio no preenchimento de defeitos ósseos criados em mastoides de ratos

    Directory of Open Access Journals (Sweden)

    Rogério Hamerschmidt

    2011-06-01

    Full Text Available Prospective Experimental study in which we created a bony defect in the mastoids of rats and filled it up with hydroxyapatite to evaluate bone regeneration, to solve the problems of open cavities after mastoidectomies that frequently present with otorrhea, infection, granulation tissue and hearing loss. OBJECTIVE: The aim was to evaluate bone regeneration in defects created in the mastoids of rats, using hydroxyapatite, to see how much of the cavity we could reduce. MATERIAL AND METHODS: Twelve rats Wistar-Furth were used. A 0.5 x 0.5 cm bone defect was created in both temporal bones of the rats, and filled with 15 micrograms of hydroxyapatite. The left side was used as control. The animals were slaughtered 40 days afterwards and histology analyses were carried out. RESULTS: In the hydroxyapatite group, the new bone growth involved an area of 68.53% of the total; and in the control group it was only of 15.97%. DISCUSSION AND CONCLUSIOn: It was observed a very good hydroxyapatite integration to the temporal bone in this experimental model. The microscopic results were superior with the use of hydroxyapatite when compared to the control group. It is a safe method and easy to apply to solve the problems of open cavities with chronic discharge and difficult to clean.Estudo experimental prospectivo utilizando ratos que foram submetidos à realização de defeito ósseo em mastoide para avaliar o grau de regeneração óssea após preenchimento com hidroxiapatita de cálcio sintética, para resolver o problema das cavidades abertas pós-mastoidectomia que frequentemente se apresentam com secreção, tecido de granulação, otorreia e perda de audição. OBJETIVO: Avaliar a regeneração óssea em defeitos criados em mastoides de ratos, utilizando hidroxiapatita cáustica, avaliando quanto a cavidade mastoidea criada pode ser diminuída, por meio de microscopia óptica. MATERIAL E MÉTODO: Foram utilizados 12 ratos Wistar. Foi criado um defeito

  13. Tempo de protrombina e de tromboplastina parcial ativada em caprinos criados extensivamente no Estado do Rio Grande do Norte Prothrombin time and activated partial thromboplastin time in goats raised extensively at Rio Grande do Norte State, Brazil

    Directory of Open Access Journals (Sweden)

    Benito Soto-Blanco

    2009-03-01

    Full Text Available Neste trabalho objetivou-se estabelecer os padrões de normalidade para tempo de protrombina (TP e tempo de tromboplastina parcial ativada (TTPA em caprinos criados extensivamente no estado do Rio Grande do Norte. Foram utilizados 40 caprinos SRD, 13 machos e 27 fêmeas, adultos, com idades entre 1 e 6 anos, todos clinicamente sadios. As amostras sanguíneas foram coletadas por venopunção jugular em tubos contendo citrato de sódio a 3,8%. O plasma foi imediatamente separado por centrifugação e refrigerado a ± 4ºC e, posteriormente, submetido às determinações de TP e TTPA por meio de métodos manuais utilizando kits comerciais. Os valores obtidos para caprinos da região, de 25,4 ± 0,90 e 39,5 ± 1,41 segundos para TP e TTPA, respectivamente, estavam dentro da normalidade.This study aimed to establish normal pattern for the prothrombin time (PT and activated partial thromboplastin time (APTT in goats extensively raised at Rio Grande do Norte state, Brazil. A total of 40 clinically healthy adult goats (13 males and 27 females aged 1 to 6 years-old was used. Blood samples were collected from jugular vein in tubes containing 3.8% of sodium citrate. The plasma was immediately separated by centrifugation and refrigerated at ± 4ºC and after submitted to PT e APTT determinations through manual methods using commercial kits. The results for goats in the region of 25.4 ± 0.90 and 39.5 ± 1.41 seconds, respectively, for PT and APTT were in an adequate range.

  14. MEIS1 functions as a potential AR negative regulator

    International Nuclear Information System (INIS)

    Cui, Liang; Li, Mingyang; Feng, Fan; Yang, Yutao; Hang, Xingyi; Cui, Jiajun; Gao, Jiangping

    2014-01-01

    The androgen receptor (AR) plays critical roles in human prostate carcinoma progression and transformation. However, the activation of AR is regulated by co-regulators. MEIS1 protein, the homeodomain transcription factor, exhibited a decreased level in poor-prognosis prostate tumors. In this study, we investigated a potential interaction between MEIS1 and AR. We found that overexpression of MEIS1 inhibited the AR transcriptional activity and reduced the expression of AR target gene. A potential protein–protein interaction between AR and MEIS1 was identified by the immunoprecipitation and GST pull-down assays. Furthermore, MEIS1 modulated AR cytoplasm/nucleus translocation and the recruitment to androgen response element in prostate specific antigen (PSA) gene promoter sequences. In addition, MEIS1 promoted the recruitment of NCoR and SMRT in the presence of R1881. Finally, MEIS1 inhibited the proliferation and anchor-independent growth of LNCaP cells. Taken together, our data suggests that MEIS1 functions as a novel AR co-repressor. - Highlights: • A potential interaction was identified between MEIS1 and AR signaling. • Overexpression of MEIS1 reduced the expression of AR target gene. • MEIS1 modulated AR cytoplasm/nucleus translocation. • MEIS1 inhibited the proliferation and anchor-independent growth of LNCaP cells

  15. Quantum treatment of the Ar-HI photodissociation dynamics

    International Nuclear Information System (INIS)

    Lopez-Lopez, Sergio; Prosmiti, Rita; Garcia-Vela, Alberto

    2004-01-01

    A wave packet simulation of the ultraviolet photolysis dynamics of Ar-HI(v=0) is reported. Cluster photodissociation is started from two different initial states, namely, the ground van der Waals (vdW) and the first excited vdW bending state, associated with the Ar-I-H and Ar-H-I isomeric forms of the system, respectively. Formation of Ar-I radical products is investigated over the energy range of the cluster absorption spectrum. It is found that the yield of bound Ar-I radical complexes is typically 90%-100% and 70%-80% for the initial states associated with the Ar-I-H and Ar-H-I isomers, respectively. This result is in agreement with the experimentally observed time-of-flight spectrum of the hydrogen fragment produced after Ar-HI photodissociation. The high Ar-I yield is explained mainly by the small amount of energy available for the radical that is converted into internal energy in the photofragmentation process, which enhances the Ar-I survival probability. Quantum interference effects manifest themselves in structures in the angular distribution of the hydrogen fragment, and in pronounced rainbow patterns in the rotational distributions of the Ar-I radical

  16. Argon defect complexes in low energy Ar irradiated molybdenum

    International Nuclear Information System (INIS)

    Veen, A. van; Buters, W.T.M.; Kolk, G.J. van der; Caspers, L.M.; Armstrong, T.R.

    1982-01-01

    Thermal desorption spectrometry has been used to study the defects created in Mo irradiated along the direction with Ar ions ranging in energy from 0.1 to 2 keV. In addition to monitoring the release of the implanted Ar, additional information has been obtained by decoration of the defects with low energy helium and subsequent monitoring of the helium release. The studies show evidence that the Ar can be trapped in both substitutional sites and in a configuration in which the Ar is associated with vacancies (ArVsub(n), n >= 2). Most of the Ar implanted at high energy is released at approx. equal to 1500 K by thermal vacancy assisted diffusion. Argon trapped closer to the surface is released at lower temperatures via at least three different surface related release mechanisms. Additional results are presented on the interaction of self interstitial atoms (introduced by 100 eV Xe bombardment) with the Ar defects. Substitutional Ar is found to convert to interstitial Ar which seems to be mobile at room temperature. The Ar-vacancy complexes are found to be reduced to substitutional Ar. The results of atomistic calculations of the release mechanisms will also be presented. (orig.)

  17. Near thermal charge transfer between Ar+2 and N2

    International Nuclear Information System (INIS)

    Holzscheiter, H.M.; Church, D.A.

    1981-01-01

    The near thermal charge transfer reaction of Ar +2 with N 2 has been studied at total pressures below 10 -7 Torr using a stored ion technique. Ar +2 ions produced by electron impact double ionization of Ar gas were selectively stored for times the order of seconds in a split-ring Penning-type ion trap. The decay with time of the initial ion sample number in a mixture of Ar and N 2 gases was fit to the sum of two exponentials, corresponding to different reaction rates for the 3 P and 1 D low-lying Ar +2 levels. The observed Ar +2 number decrease is attributed to the double-charge transfer process Ar +2 +N 2 →Ar+N 2 +2 →Ar+N + +N + in accord with recent flow-tube measurements. A rate constant for the metastable Ar +2 ( 1 D) level reaction with a value k( 1 D)=1.4 x 10 -9 cm 3 /sec is obtained, using the previously measured rate constant for the Ar +2 ( 3 P) state

  18. MEIS1 functions as a potential AR negative regulator

    Energy Technology Data Exchange (ETDEWEB)

    Cui, Liang [Department of Urology, Chinese PLA Medical School/Chinese PLA General Hospital, Beijing 100853 (China); Department of Urology, Civil Aviation General Hospital/Civil Aviation Medical College of Peking University, Beijing 100123 (China); Li, Mingyang [Department of Gastroenterology, Nan Lou Division, Chinese PLA Medical School/Chinese PLA General Hospital, Beijing 100853 (China); Feng, Fan [Department of Pharmacy, General Hospital of Shenyang Military Command, Shenyang 110016 (China); Yang, Yutao [Beijing Institute for Neuroscience, Capital Medical University, Beijing 100069 (China); Hang, Xingyi [National Scientific Data Sharing Platform for Population and Health, Beijing 100730 (China); Cui, Jiajun, E-mail: cuijn@ucmail.uc.edu [Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267 (United States); Gao, Jiangping, E-mail: jpgao@163.com [Department of Urology, Chinese PLA Medical School/Chinese PLA General Hospital, Beijing 100853 (China)

    2014-10-15

    The androgen receptor (AR) plays critical roles in human prostate carcinoma progression and transformation. However, the activation of AR is regulated by co-regulators. MEIS1 protein, the homeodomain transcription factor, exhibited a decreased level in poor-prognosis prostate tumors. In this study, we investigated a potential interaction between MEIS1 and AR. We found that overexpression of MEIS1 inhibited the AR transcriptional activity and reduced the expression of AR target gene. A potential protein–protein interaction between AR and MEIS1 was identified by the immunoprecipitation and GST pull-down assays. Furthermore, MEIS1 modulated AR cytoplasm/nucleus translocation and the recruitment to androgen response element in prostate specific antigen (PSA) gene promoter sequences. In addition, MEIS1 promoted the recruitment of NCoR and SMRT in the presence of R1881. Finally, MEIS1 inhibited the proliferation and anchor-independent growth of LNCaP cells. Taken together, our data suggests that MEIS1 functions as a novel AR co-repressor. - Highlights: • A potential interaction was identified between MEIS1 and AR signaling. • Overexpression of MEIS1 reduced the expression of AR target gene. • MEIS1 modulated AR cytoplasm/nucleus translocation. • MEIS1 inhibited the proliferation and anchor-independent growth of LNCaP cells.

  19. AR-Signaling in Human Malignancies: Prostate Cancer and Beyond

    Directory of Open Access Journals (Sweden)

    Michael T. Schweizer

    2017-01-01

    Full Text Available In the 1940s Charles Huggins reported remarkable palliative benefits following surgical castration in men with advanced prostate cancer, and since then the androgen receptor (AR has remained the main therapeutic target in this disease. Over the past couple of decades, our understanding of AR-signaling biology has dramatically improved, and it has become apparent that the AR can modulate a number of other well-described oncogenic signaling pathways. Not surprisingly, mounting preclinical and epidemiologic data now supports a role for AR-signaling in promoting the growth and progression of several cancers other than prostate, and early phase clinical trials have documented preliminary signs of efficacy when AR-signaling inhibitors are used in several of these malignancies. In this article, we provide an overview of the evidence supporting the use of AR-directed therapies in prostate as well as other cancers, with an emphasis on the rationale for targeting AR-signaling across tumor types.

  20. Escala de valores relativos ao trabalho : EVT

    Directory of Open Access Journals (Sweden)

    Porto Juliana Barreiros

    2003-01-01

    Full Text Available Na literatura internacional são encontradas várias escalas para medir valores relativos ao trabalho, porém a maioria apresenta problemas com relação à definição do conceito ou a falta de integração com os modelos teóricos sobre valores pessoais. No Brasil foram encontrados dois instrumentos, um não foi validado para a população brasileira e o outro foi validado para uma população de baixa escolaridade. Foi objetivo do presente estudo desenvolver e validar uma Escala de Valores relativos ao Trabalho. Para o desenvolvimento da EVT foi realizado um levantamento de instrumentos anteriores e foram entrevistados trabalhadores. Após a análise de juízes e validação semântica, o instrumento foi respondido por 394 pessoas. A análise fatorial apontou para quatro fatores: Realização no trabalho, Relações sociais, Prestígio e Estabilidade. O instrumento após validação é composto por 45 itens. Os resultados corroboraram o modelo teórico previsto e conclui-se que a escala foi devidamente estabelecida e pode ser utilizada para pesquisa e diagnóstico.

  1. Nefrocalcinose associada ao uso de esteroide anabolizante

    Directory of Open Access Journals (Sweden)

    Weverton Machado Luchi

    2015-03-01

    Full Text Available Os esteroides anabolizantes têm sido usados como arma terapêutica em diversas condições clínicas. Entretanto, o uso abusivo e indiscriminado, associado a outros suplementos nutricionais, tem gerado efeitos adversos graves. Relato do caso: Sexo masculino, 21 anos, admitido com náuseas, astenia, hiporexia, cefaleia e hipertensão arterial. Exames no sangue evidenciaram Cr: 3,9 mg/dl U:100 mg/dl e Cálcio total 14 mg/dl. Ultrassonografia e biópsia renal compatíveis com nefrocalcinose. Houve melhora gradativa da função renal e da calcemia após hidratação vigorosa e furosemida. Entretanto, após 1 ano, persistiram depósitos renais de cálcio e relação córticomedular reduzida ao ultrassom e creatinina estável em 1,4 mg/dl. Casos anteriores evidenciaram necrose tubular aguda e nefrite intersticial com poucos depósitos de cálcio no interstício renal. Nesse caso, encontramos nefrocalcinose acentuada associada à nefroesclerose. O objetivo deste estudo é relatar a ocorrência de injúria renal aguda com nefrocalcinose associada ao uso de esteroide anabolizante e oferecer uma revisão do assunto.

  2. The ChArMEx database

    Science.gov (United States)

    Ferré, Helene; Belmahfoud, Nizar; Boichard, Jean-Luc; Brissebrat, Guillaume; Descloitres, Jacques; Fleury, Laurence; Focsa, Loredana; Henriot, Nicolas; Mastrorillo, Laurence; Mière, Arnaud; Vermeulen, Anne

    2014-05-01

    The Chemistry-Aerosol Mediterranean Experiment (ChArMEx, http://charmex.lsce.ipsl.fr/) aims at a scientific assessment of the present and future state of the atmospheric environment in the Mediterranean Basin, and of its impacts on the regional climate, air quality, and marine biogeochemistry. The project includes long term monitoring of environmental parameters, intensive field campaigns, use of satellite data and modelling studies. Therefore ChARMEx scientists produce and need to access a wide diversity of data. In this context, the objective of the database task is to organize data management, distribution system and services, such as facilitating the exchange of information and stimulating the collaboration between researchers within the ChArMEx community, and beyond. The database relies on a strong collaboration between OMP and ICARE data centres and has been set up in the framework of the Mediterranean Integrated Studies at Regional And Locals Scales (MISTRALS) program data portal. All the data produced by or of interest for the ChArMEx community will be documented in the data catalogue and accessible through the database website: http://mistrals.sedoo.fr/ChArMEx. At present, the ChArMEx database contains about 75 datasets, including 50 in situ datasets (2012 and 2013 campaigns, Ersa background monitoring station), 25 model outputs (dust model intercomparison, MEDCORDEX scenarios), and a high resolution emission inventory over the Mediterranean. Many in situ datasets have been inserted in a relational database, in order to enable more accurate data selection and download of different datasets in a shared format. The database website offers different tools: - A registration procedure which enables any scientist to accept the data policy and apply for a user database account. - A data catalogue that complies with metadata international standards (ISO 19115-19139; INSPIRE European Directive; Global Change Master Directory Thesaurus). - Metadata forms to document

  3. 40Ar-39Ar laser probe dating of individual clinopyroxene inclusions in Premier eclogitic diamonds

    International Nuclear Information System (INIS)

    Burgess, R.; Turner, G.; Laurenzi, M.; Harris, J.W.

    1989-01-01

    The ages of seven individual clinopyroxene inclusions in Premier diamonds of eclogitic association have been determined using the 40 Ar- 39 Ar dating technique. Syngenetic inclusions weighing between 10 and 130 μg were exposed on cleaved surfaces of the diamonds and analysed using a laser probe. The inclusion ages were found to be in the range 1111±35 to 1254±38 Ma with an average of 1185±94 Ma. The ages obtained are in good agreement with previous determinations made on aggregates of eclogitic inclusions from Premier diamonds and demonstrate the applicability of the laser probe to dating individual diamond inclusions. (orig.)

  4. Argon in hornblende, biotite and muscovite in geologic cooling - Ar-40/Ar-39-investigations

    International Nuclear Information System (INIS)

    Rittman, K.L.

    1984-01-01

    The results of the Ar-40/Ar-39 studies are discussed under the aspect of whether the age data of the minerals indicate a cooling process. The author hopes that isotope dating of minerals with different closing temperatures will describe the temperature/time history of an area in the temperature range of 600 to 200 0 C. The findings are analyzed under three aspects: How much do they contribute to the initial methodological question, what do they contribute to the regional geology of the areas investigated, and in what respects do they extent the present knowledge of the geochronological analysis, i.e. its techniques and interpretation. (orig.) [de

  5. Microbiologia do ar : monitorização do ar em ambiente hospitalar

    OpenAIRE

    Santos, Ana Carina Marques dos

    2008-01-01

    O complexo ambiente hospitalar requer atenção especial, para assegurar uma saudável qualidade do ar interior, protegendo assim os profissionais de saúde e utentes de infecções nosocomiais e de doenças ocupacionais. Embora seja amplamente reconhecido que a contaminação de um bloco operatório seja a principal responsável pela complicação de uma cirurgia, em Portugal, estudos sobre microbiologia do ar a nível hospitalar são escassos. O objectivo deste estudo é investigar a vari...

  6. PERFORMANCE AND CARCASS CHARACTERISTICS OF BROILER CHICKENS FED WITH DIETS WITH OR WITHOUT PROBIOTIC ON RAISED ON NEW OR REUSED LITTER DESEMPENHO E CARACTERÍSTICAS DE CARCAÇA DE FRANGOS DE CORTE ALIMENTADOS COM RAÇÃO CONTENDO PROBIÓTICO E CRIADOS SOBRE CAMA NOVA OU REUTILIZADA

    Directory of Open Access Journals (Sweden)

    Vera Maria Barbosa de Moraes

    2009-04-01

    : Carcass yield, feed conversion, feed intake, weight gain.

    Três experimentos foram desenvolvidos com o objetivo de avaliar o desempenho e as características de carcaça de frangos de corte, criados sobre cama nova ou reutilizada, por até quatro ciclos e consumindo rações com ou sem probiótico. Utilizaram-se, em cada experimento, oitocentos pintos de um dia, machos, da linhagem comercial Ross, alojados em vinte boxes, em densidade populacional constante de dez aves/m2. O delineamento experimental adotado foi o inteiramente casualizado, com quatro tratamentos e cinco repetições, obedecendo a esquema fatorial 2 x 2 (cama nova ou reutilizada x rações com ou sem probiótico. O probiótico utilizado nas rações foi composto por Bacillus subtilis e B. coagulans (2x109 e 1x107 UFC, respectivamente. As aves e as sobras de ração foram pesadas aos 21 e 42 dias de idade para determinação do desempenho. Em cada um dos experimentos, aos 42 dias de idade, abateram-se quatro aves de cada boxe para avaliação das características de carcaça. Não houve interação significativa (P>0,05 entre tipo de cama e uso ou ausência de probiótico em nenhum dos ciclos de criação. No experimento com reutilização da cama por dois ciclos, as aves alimentadas com probiótico apresentaram menor ganho de peso e pior conversão alimentar (P<0,05 no período de 1 a 21 dias, porém, não foram observadas diferenças estatísticas (P>0,05 para o período de 1 a 42 dias, assim como para os demais experimentos. Também não se observaram diferenças significativas para o rendimento de carcaça e cortes (P>0,05. No experimento com reutilização da cama por três ciclos, as aves apresentaram maior ganho de peso e melhor conversão alimentar, comparadas àquelas criadas sobre cama nova. As aves criadas sobre cama reutilizada por quatro ciclos apresentaram maior ganho de peso. Concluiu-se não haver efeitos benéficos da

  7. H + Ar collisions. II. Differential scattering calculations

    International Nuclear Information System (INIS)

    Neumann, H.; Le, T.Q.; van Zyl, B.

    1977-01-01

    Differential elastic scattering cross-section calculations have been made for H + Ar collisions using classical and eikonal techniques. The calculation procedures are described and compared with existing experimental data. It is shown that the angular distribution of the elastic cross section is similar to that obtained for proton production in such collisions at energies above about 200 eV. By combining the angular dependence of the computed elastic cross section with experimental measurements described in the preceding paper, absolute differential cross sections for proton production have been determined

  8. Prostate Cancer Cells Express More Androgen Receptor (AR) Following Androgen Deprivation, Improving Recognition by AR-Specific T Cells.

    Science.gov (United States)

    Olson, Brian M; Gamat, Melissa; Seliski, Joseph; Sawicki, Thomas; Jeffery, Justin; Ellis, Leigh; Drake, Charles G; Weichert, Jamey; McNeel, Douglas G

    2017-12-01

    Androgen deprivation is the primary therapy for recurrent prostate cancer, and agents targeting the androgen receptor (AR) pathway continue to be developed. Because androgen-deprivation therapy (ADT) has immmunostimulatory effects as well as direct antitumor effects, AR-targeted therapies have been combined with other anticancer therapies, including immunotherapies. Here, we sought to study whether an antigen-specific mechanism of resistance to ADT (overexpression of the AR) may result in enhanced AR-specific T-cell immune recognition, and whether this might be strategically combined with an antitumor vaccine targeting the AR. Androgen deprivation increased AR expression in human and murine prostate tumor cells in vitro and in vivo The increased expression persisted over time. Increased AR expression was associated with recognition and cytolytic activity by AR-specific T cells. Furthermore, ADT combined with vaccination, specifically a DNA vaccine encoding the ligand-binding domain of the AR, led to improved antitumor responses as measured by tumor volumes and delays in the emergence of castrate-resistant prostate tumors in two murine prostate cancer models (Myc-CaP and prostate-specific PTEN-deficient mice). Together, these data suggest that ADT combined with AR-directed immunotherapy targets a major mechanism of resistance, overexpression of the AR. This combination may be more effective than ADT combined with other immunotherapeutic approaches. Cancer Immunol Res; 5(12); 1074-85. ©2017 AACR . ©2017 American Association for Cancer Research.

  9. Light Curve Variations of AR Lacertae

    Directory of Open Access Journals (Sweden)

    Il-Seong Nha

    1991-12-01

    Full Text Available Sixteen unitary Light curves of AR Lac in B and V are made at Yonsei University Observatory in the period of 1980-1988. Some overview findings of light variations are made. (1 The light variations outside eclipse follow none of the wave migration patterns reported by previous investigators. (2 Complicated shapes outside eclipse are apparently much reduced in the light curves of 1983-1984. This suggests that, in the future, AR Lac has a chance to attain a normal state with mo complicated interactions. (3 The depths of the primary and the secondary mid-eclipses are changing year-to-year. (4 The K0 star, the larger component, has brightened by 0.m14 V, while the G2 star has shown a fluctuation of about 0.m05 in V. (5 The B-V values at primary mid-eclipse have no correlation with the depth variations. (6 Independently of the increase of maximum brightness, the B-V colors in the non-eclipsed phases changed slightly over the years.

  10. Demandas de cuidado domiciliar da criança nascida exposta ao HIV na ótica da teoria ambientalista

    Directory of Open Access Journals (Sweden)

    Ivana Cristina Vieira de Lima

    Full Text Available Objetivou-se identificar as demandas de cuidado domiciliar da criança nascida exposta ao HIV, sob a perspectiva da teoria ambientalista. Trata-se de estudo qualitativo exploratório-descritivo realizado de janeiro a abril de 2011. Participaram dez mães infectadas pelo HIV, com crianças nascidas expostas ao vírus, em Fortaleza, Ceará. Constituíram-se como instrumentos de coleta de dados: câmera fotográfica descartável e digital e formulários para captação de informações em saúde associadas ao ambiente domiciliar. Os resultados foram contextualizados de acordo com a teoria e organizados em categorias: "vulnerabilidades associadas à estrutura física da moradia"; "ar intradomiciliar e peridomiciliar impuro"; "água utilizada para consumo"; "rede de esgoto e saneamento"; "iluminação e ventilação da residência". Conclui-se que o ambiente domiciliar oferece condições ambientais desfavoráveis para a criança. Urge a realização de intervenções focalizadas no ambiente domiciliar, para promover a saúde da criança nascida exposta ao HIV.

  11. High-resolution 40Ar/39Ar chronology of multiple intrusion igneous complexes

    Science.gov (United States)

    Foland, K. A.; Chen, J.-F.; Linder, J. S.; Henderson, C. M. B.; Whillans, I. M.

    1989-06-01

    The Mount Brome complex of the Monteregian province of southern Quebec, Canada, consits of several major intrusions ranging compositionally from gabbro to syenite. The relative ages of these intrusives have been investigated with high-resolution 40Ar/39Ar analyses, including a specially designed irradiation configuration to cancel the effects of fluence gradients. Small yet distinct apparent age differences are observed. While a number of analytical and geological factors could be proposed to explain the small variations, evaluation of these suggests the age differences reflect those in emplacement times. The gabbro and nepheline diorite were emplaced within a short span 123.1 Ma ago. Generally more evolved lithologies (biotite monzodiorite, pulaskite, nordmarkite) appear to have been emplaced within a restricted interval 1.4±0.3 Ma later. Whole-rock Rb-Sr systematics do not give acceptable isochrons because of significant scatter interpreted to reflect initial 87Sr/86Sr heterogeneities resulting from crustal contamination. Considering the variations in initial ratio, the Rb-Sr data are consistent with the 40Ar/39Ar age.

  12. 40Ar-39Ar dating of hornfels dredged near the Japan trench

    International Nuclear Information System (INIS)

    Takigami, Yutaka; Fujioka, Kantaro

    1989-01-01

    During the KH 81-3 Cruise of the R/V Hakuho-Maru, biotite-bearing hornfelses were dredged from the landward slope of the Japan Trench. Bulk sample and separated biotite were dated by the 40 Ar- 39 Ar method and they showed 40 Ar- 39 Ar ages of 28.9±1.4 Ma and 28.5±1.4 Ma, respectively. This would indicate that biotite was formed at about 29 Ma by the thermal metamorphism which might have related with some magmatic activity. In this magmatic activity was caused by the subducting oceanic plate in the similar conditions at present, it seems to have occurred at a place too close to the present trench axis. This discrepancy could be explained by such processes as the change of the angle of the subducting plate, the moving of the trench axis by tectonic erosion and so on. However, more age data are required to solve this discrepancy. (author)

  13. The 40Ar/39Ar and K/Ar dating of lavas from the Hilo 1-km core hole, Hawaii Scientific Drilling Project

    Science.gov (United States)

    Sharp, W.D.; Turrin, B.D.; Renne, P.R.; Lanphere, M.A.

    1996-01-01

    Mauna Kea lava flows cored in the HilIo hole range in age from <200 ka to about 400 ka based on 40Ar/39Ar incremental heating and K-Ar analyses of 16 groundmass samples and one coexisting plagioclase. The lavas, all subaerially deposited, include a lower section consisting only of tholeiitic basalts and an upper section of interbedded alkalic, transitional tholeiitic, and tholeiitic basalts. The lower section has yielded predominantly complex, discordant 40Ar/39Ar age spectra that result from mobility of 40Ar and perhaps K, the presence of excess 40Ar, and redistribution of 39Ar by recoil. Comparison of K-Ar ages with 40Ar/39Ar integrated ages indicates that some of these samples have also lost 39Ar. Nevertheless, two plateau ages of 391 ?? 40 and 400 ?? 26 ka from deep in the hole, combined with data from the upper section, show that the tholeiitic section accumulated at an average rate of about 7 to 8 m/kyr and has an mean recurrence interval of 0.5 kyr/flow unit. Samples from the upper section yield relatively precise 40Ar/39Ar plateau and isotope correlation ages of 326 ?? 23, 241 ?? 5, 232 ?? 4, and 199 ?? 9 ka for depths of -415.7 m to -299.2 m. Within their uncertainty, these ages define a linear relationship with depth, with an average accumulation rate of 0.9 m/kyr and an average recurrence interval of 4.8 kyr/flow unit. The top of the Mauna Kea sequence at -280 m must be older than the plateau age of 132 ?? 32 ka, obtained for the basal Mauna Loa flow in the corehole. The upward decrease in lava accumulation rate is a consequence of the decreasing magma supply available to Mauna Kea as it rode the Pacific plate away from its magma source, the Hawaiian mantle plume. The age-depth relation in the core hole may be used to test and refine models that relate the growth of Mauna Kea to the thermal and compositional structure of the mantle plume.

  14. Hepatotoxicidade associada ao uso de esteroides anabolizantes

    Directory of Open Access Journals (Sweden)

    Mónica Brinquinho

    2017-06-01

    Full Text Available O consumo de esteroides androgénicos anabolizantes tem vindo a aumentar no meio desportivo amador, sendo de fácil acesso apesar de se tratarem de substâncias proibidas. Estão descritos múltiplos efeitos laterais, sendo a hepatotoxicidade uma das mais reportadas. Apresentam-se dois casos clínicos representativos da lesão hepática associada ao consumo de esteroides anabolizantes. Ambos evidenciaram morbilidade significativa, embora nenhum deles tenha evoluído para falência hepática. Os autores pretendem chamar a atenção para o consumo destes fármacos, particularmente frequente em indivíduos jovens, praticantes de desporto amador.

  15. 40Ar/39Ar age of the Rotoiti Breccia and Rotoehu Ash, Okataina Volcanic Complex, New Zealand, and identification of heterogeneously distributed excess 40Ar in supercooled crystals

    DEFF Research Database (Denmark)

    Flude, Stephanie; Storey, Michael

    2016-01-01

    Co-magmatic granitoid clasts erupted as part of the Rotoiti Ignimbrite (Rotoehu Tephra) contain euhedral K-feldspar and biotite crystals that protrude into miarolytic cavities and show textural evidence for growth in super-cooled conditions and are thus interpreted as growing during eruption. 40Ar...... that appear to be largely unaffected by excess 40Ar. This population gives a statistically robust weighted mean age of 47.4 ± 1.5 ka (1σ, n = 13) and an indistinguishable inverse isochron age of 50 ± 3 ka for this historically difficult to date eruption. The weighted mean age is significantly younger than...... previous age estimates of the Rotoiti eruption obtained by K/Ar and 40Ar/39Ar dating of bracketing lavas, but is indistinguishable from recent 14C and (U–Th)/He dates and estimates based on orbital tuning and sedimentation rates constrained by 14C ages....

  16. Structural, K-Ar and 40Ar-39Ar age studies of adularia K-feldspars from the Lizard Complex, England

    International Nuclear Information System (INIS)

    Halliday, A.N.; Mitchell, J.G.

    1976-01-01

    Conventional K-Ar analyses of fifteen adularia feldspars from the Lizard Complex yield ages between 181+-2 Ma and 220+-3 Ma (with one exception from Holseer Cove yielding an age of 156+-3 Ma). The feldspars are dominantly monoclinic but most contain a minor but constant proportion of triclinic material with variable triclinicity. An inverse correlation exists between triclinicity and K-Ar age interpreted as representing argon loss related to the structural state. Extrapolation of the data to zero triclinicity indicates a true age of 210-220 Ma. 40 Ar- 39 Ar stepwise degassing analyses yield plateau ages related to the K-Ar ages and not the crystallization age. The results can be explained in terms of postcrystallization Al-Si ordering resulting in argon loss from lattice sites which under normal diffusion conditions requires a range of activation energies. The Holseer Cove sample is monoclinic and an 40 Ar- 39 Ar stepheating analysis suggests a later crystallization at 160-170 Ma. Neither primary crystallization nor spontaneous ordering through time explain the origin of the triclinic adularia. It is suggested that ordering has been induced by the passage of low-temperature alkaline solutions at a subsequent point in geological time. Argon loss by ordering could explain the low ages found using both K-Ar and 40 Ar- 39 Ar stepheating methods when applied to feldspars in general. The 210-220 Ma, and 160-170 Ma hydrothermal events affected much of southwest England and are probably related to major geotectonic movements in western Europe. (Auth.)

  17. Androgen Receptor-Mediated Growth Suppression of HPr-1AR and PC3-Lenti-AR Prostate Epithelial Cells.

    Directory of Open Access Journals (Sweden)

    Young-Chae Kim

    Full Text Available The androgen receptor (AR mediates the developmental, physiologic, and pathologic effects of androgens including 5α-dihydrotestosterone (DHT. However, the mechanisms whereby AR regulates growth suppression and differentiation of luminal epithelial cells in the prostate gland and proliferation of malignant versions of these cells are not well understood, though they are central to prostate development, homeostasis, and neoplasia. Here, we identify androgen-responsive genes that restrain cell cycle progression and proliferation of human prostate epithelial cell lines (HPr-1AR and PC3-Lenti-AR, and we investigate the mechanisms through which AR regulates their expression. DHT inhibited proliferation of HPr-1AR and PC3-Lenti-AR, and cell cycle analysis revealed a prolonged G1 interval. In the cell cycle, the G1/S-phase transition is initiated by the activity of cyclin D and cyclin-dependent kinase (CDK complexes, which relieve growth suppression. In HPr-1AR, cyclin D1/2 and CDK4/6 mRNAs were androgen-repressed, whereas CDK inhibitor, CDKN1A, mRNA was androgen-induced. The regulation of these transcripts was AR-dependent, and involved multiple mechanisms. Similar AR-mediated down-regulation of CDK4/6 mRNAs and up-regulation of CDKN1A mRNA occurred in PC3-Lenti-AR. Further, CDK4/6 overexpression suppressed DHT-inhibited cell cycle progression and proliferation of HPr-1AR and PC3-Lenti-AR, whereas CDKN1A overexpression induced cell cycle arrest. We therefore propose that AR-mediated growth suppression of HPr-1AR involves cyclin D1 mRNA decay, transcriptional repression of cyclin D2 and CDK4/6, and transcriptional activation of CDKN1A, which serve to decrease CDK4/6 activity. AR-mediated inhibition of PC3-Lenti-AR proliferation occurs through a similar mechanism, albeit without down-regulation of cyclin D. Our findings provide insight into AR-mediated regulation of prostate epithelial cell proliferation.

  18. O letramento e a organização da informação digital aliados ao aprendizado ao longo da vida

    Directory of Open Access Journals (Sweden)

    Sonia Boeres

    2018-03-01

    Full Text Available O letramento digital é fruto de pensamento crítico e busca potencializar os métodos de estudo pela tecnologia da informação. A questão de pesquisa aqui tratada é compreender como o letramento digital pode contribuir para o aprendizado ao longo da vida. O objetivo é traçar um paralelo entre o letramento e a informação digital e o aprendizado ao longo da vida. Como metodologia fez-se uma revisão de literatura, nacional e internacional, sobre o processo de ensino e aprendizagem, letramento informacional, digital e aprendizado ao longo da vida. Esta pesquisa é de natureza descritiva e base qualitativa. Os principais resultados observados foram que o letramento digital leva a variadas práticas de leitura e escrita por meio das tecnologias da informação. Estas trazem novas possibilidades para educadores e educandos, profissionais e usuários, transcendendo o simples ato de decodificar sinais ou pesquisar na Internet. Ser letrado digitalmente leva à compreensão de que a tecnologia da informação vai além de novas formas de acesso à informação, mas também a novos processos cognitivos e formas de conhecimento. Chegando-se a esse patamar, cabe o árduo e prazeroso trabalho de manter-se atualizado ao longo do tempo, por meio de um esforço pessoal, que envolvem cursos e treinamentos como fonte de aprendizagem e desenvolvimento de trabalho em conjunto com especialistas. Em suma, há que se manter atualizado, acompanhando a evolução tecnológica, e para tanto, ser destemido das tecnologias e do uso das mídias digitais.

  19. Etching properties of BLT films in CF4/Ar plasma

    International Nuclear Information System (INIS)

    Kim, Dong Pyo; Kim, Kyoung Tae; Kim, Chang Il

    2003-01-01

    CF 4 /Ar plasma mass content and etching rate behavior of BLT thin films were investigated in inductively coupled plasma (ICP) reactor as functions of CF 4 /Ar gas mixing ratio, rf power, and dc bias voltage. The variation of relative volume densities for F and Ar atoms were measured by the optical emission spectroscopy (OES). The etching rate as functions of Ar content showed the maximum of 803 A/min at 80 % Ar addition into CF 4 plasma. The presence of maximum etch rate may be explained by the concurrence of two etching mechanisms such as physical sputtering and chemical reaction. The role of Ar ion bombardment includes destruction of metal (Bi, La, Ti)-O bonds as well as support of chemical reaction of metals with fluorine atoms

  20. Análise de um protótipo de condicionador de ar adsortivo evaporativo para clima quente e úmido

    Directory of Open Access Journals (Sweden)

    Jesus Marlinaldo de Medeiros

    2015-06-01

    Full Text Available O sistema de condicionamento de ar adsortivo evaporativo funciona com a desumidificação do ar externo, forçando-o a passar através de um adsorvente, onde parte do vapor de água é retido e o ar quase seco é umidificado através de resfriadores evaporativos para redução de sua temperatura. O desumidificador adsortivo utilizou cerca de 4,4 kg de sílica-gel com diâmetro de 2 a 5 mm sobre telas metálicas garantindo maior rigidez à estrutura, melhor distribuição da sílica e circulação do ar. A sílica-gel foi regenerada através de aquecedor elétrico com fluxo de ar forçado por um período de 4 horas. O climatizador comercial tipo resfriador evaporativo foi testado com fibras evaporativas sintéticas e naturais. Os resultados mostraram que dependendo do painel evaporativo ocorre uma maior perda de carga no escoamento, provocando a diminuição da velocidade e comprometendo o rendimento do equipamento. O sistema completo foi testado, verificandose que o desumidificador reduziu a razão de umidade do fluxo de ar, mas o aumento da temperatura do ar associado ao calor de adsorção comprometeu o rendimento do protótipo. Portanto, para obter conforto térmico com o condicionador adsortivo evaporativo será necessário resfriar o ar após o desumidificador com a circulação da água do climatizador.

  1. Microbial contamination of central supply systems for medical air Contaminação microbiana dos sistemas centrais de abastecimento de ar medicinal

    Directory of Open Access Journals (Sweden)

    Carolina Machado Andrade

    2003-11-01

    Full Text Available There are many standards and recommendations for breathing air quality associated with respiratory protection equipment, but little has been done regarding the possible microbial contamination of medical air. The present study demonstrates quantitatively and qualitatively that pipelines might be incriminated as source of microbial contamination of compressed and synthetic air for medical use. Air samples were drawn into an especially pressure-resistant device and the bacterial and fungi contents were identified after growth on agar plates. The bacterial flora isolated from peripheral air outlets was virtually the same as that found in the central air-generating installations, consisting of a mixture of pathogens and normal skin bacteria. Several factors contributing to microbial contamination of medical air are mentioned and preventive measures are discussed.Existem vários padrões e recomendações para a qualidade do ar respirável relacionado aos equipamentos de proteção respiratória, mas pouco tem sido feito em relação a uma possível contaminação microbiana do ar medicinal. O presente trabalho demonstra quantitativa e qualitativamente que as linhas de ar estão relacionadas à contaminação microbiológica do ar comprimido e ar sintético para uso medicinal. Amostras de ar foram coletadas por um equipamento especialmente resistente a pressão, e o conteúdo bacteriano e fúngico foi identificado após crescimento em placa. A flora bacteriana isolada tanto dos sistema periféricos de ar foi virtualmente a mesma encontrada nas instalações centralizadas, sendo uma mistura de patógenos e bactérias normais da pele. Vários fatores contribuintes para a contaminação microbiana do ar medicinal e medidas preventivas são discutidas.

  2. Ar-37 in the Atmospheric and Sub-Soil Gases

    International Nuclear Information System (INIS)

    Purtschert, R.; Raghoo, L.S.

    2015-01-01

    On-site inspection of the radioactive noble gas isotope 37Ar is a definitive and unambiguous indicator of an underground nuclear explosion. 37Ar is produced underground by neutron activation of calcium by the reaction 40Ca(n,α)37Ar. In the atmosphere, 37Ar is produced by the spallation reaction 40Ar(n,4n)37Ar. Periodic measurements over the last six years on air collected in Bern revealed a background level in the order of 1-5 mBq/m 3 air in agreement with former findings and theoretical calculations. Those calculations also indicated that the intrusion of stratospheric air masses may lead to elevated tropospheric 37Ar concentrations up to 8-10 mBq/m 3 air. Selected samples taken up to now in the vicinity of nuclear power plants revealed no significant deviation from the natural background. In order to distinguish between natural and artificially elevated 37Ar the location-specific 37Ar activity range in soils, rocks and the atmosphere were identified. From CARIBIC flights, a passenger aircraft with a special air freight container filled with scientific equipment in the cargo compartment, tropospheric air samples were analyzed for 37Ar and 85Kr. The natural 37Ar production in soils and the rock basement underlying the alluvium is investigated by means of in situ measurements of different isotopes, theoretical calculations and irradiation experiments on selected rock samples. This will help resolve the temporal evolution and/or constancy of the natural 37Ar background and allow for an interpretation in terms of the identification of clandestine nuclear explosions. (author)

  3. Cross sections of the 36Ar(d,α)34mCl, 40Ar(d,α)38Cl, and 40Ar(d,p)41Ar nuclear reactions below 8.4 MeV.

    Science.gov (United States)

    Engle, J W; Severin, G W; Barnhart, T E; Knutson, L D; Nickles, R J

    2012-02-01

    We have measured the cross section for production of the medically interesting isotope (34m)Cl, along with (38)Cl and (41)Ar, using deuteron bombardments of (36)Ar and (40)Ar below 8.4 MeV. ALICE/ASH analytical codes were employed to determine the shape of nuclear excitation functions, and experiments were performed using the University of Wisconsin tandem electrostatic accelerator to irradiate thin targets of argon gas. Copyright © 2011 Elsevier Ltd. All rights reserved.

  4. Cross Sections of the 36Ar(d,α)34mCl, 40Ar(d,α)38Cl and 40Ar(d,p)41Ar Nuclear Reactions below 8.4 MeV

    Science.gov (United States)

    Engle, J W; Severin, G W; Barnhart, T E; Knutson, L D; Nickles, R J

    2011-01-01

    We have measured the cross section for production of the medically interesting isotope 34mCl, along with 38Cl and 41Ar, using deuteron bombardments of 36Ar and 40Ar below 8.4 MeV. ALICE/ASH analytical codes were employed to determine the shape of nuclear excitation functions, and experiments were performed using the University of Wisconsin tandem electrostatic accelerator to irradiate thin targets of argon gas. PMID:22041299

  5. Progress on using deuteron-deuteron fusion generated neutrons for 40Ar/39Ar sample irradiation

    Science.gov (United States)

    Rutte, Daniel; Renne, Paul R.; Becker, Tim; Waltz, Cory; Ayllon Unzueta, Mauricio; Zimmerman, Susan; Hidy, Alan; Finkel, Robert; Bauer, Joseph D.; Bernstein, Lee; van Bibber, Karl

    2017-04-01

    We present progress on the development and proof of concept of a deuteron-deuteron fusion based neutron generator for 40Ar/39Ar sample irradiation. Irradiation with deuteron-deuteron fusion neutrons is anticipated to reduce Ar recoil and Ar production from interfering reactions. This will allow dating of smaller grains and increase accuracy and precision of the method. The instrument currently achieves neutron fluxes of ˜9×107 cm-2s-1 as determined by irradiation of indium foils and use of the activation reaction 115In(n,n')115mIn. Multiple foils and simulations were used to determine flux gradients in the sample chamber. A first experiment quantifying the loss of 39Ar is underway and will likely be available at the time of the presentation of this abstract. In ancillary experiments via irradiation of K salts and subsequent mass spectrometric analysis we determined the cross-sections of the 39K(n,p)39Ar reaction at ˜2.8 MeV to be 160 ± 35 mb (1σ). This result is in good agreement with bracketing cross-section data of ˜96 mb at ˜2.45 MeV and ˜270 mb at ˜4 MeV [Johnson et al., 1967; Dixon and Aitken, 1961 and Bass et al. 1964]. Our data disfavor a much lower value of ˜45 mb at 2.59 MeV [Lindström & Neuer, 1958]. In another ancillary experiment the cross section for 39K(n,α)36Cl at ˜2.8 MeV was determined as 11.7 ± 0.5 mb (1σ), which is significant for 40Ar/39Ar geochronology due to subsequent decay to 36Ar as well as for the determination of production rates of cosmogenic 36Cl. Additional experiments resolving the cross section functions on 39K between 1.5 and 3.6 MeV are on their way using the LICORNE neutron source of the IPN Orsay tandem accelerator. Results will likely be available at the time of the presentation of this abstract. While the neutron generator is designed for fluxes of ˜109 cm-2s-1, arcing in the sample chamber currently limits the power—straightforwardly correlated to the neutron flux—the generator can safely be run at. Further

  6. Electron relaxation properties of Ar magnetron plasmas

    Science.gov (United States)

    Xinjing, CAI; Xinxin, WANG; Xiaobing, ZOU

    2018-03-01

    An understanding of electron relaxation properties in plasmas is of importance in the application of magnetrons. An improved multi-term approximation of the Boltzmann equation is employed to study electron transport and relaxation properties in plasmas. Elastic, inelastic and nonconservative collisions between electrons and neutral particles are considered. The expressions for the transport coefficients are obtained using the expansion coefficients and the collision operator term. Numerical solutions of the matrix equations for the expansion coefficients are also investigated. Benchmark calculations of the Reid model are presented to demonstrate the accuracy of the improved multi-term approximation. It is shown that the two-term approximation is generally not accurate enough and the magnetic fields can reduce the anisotropy of the velocity distribution function. The electron relaxation properties of Ar plasmas in magnetrons for various magnetic fields are studied. It is demonstrated that the energy parameters change more slowly than the momentum parameters.

  7. Sensibility of different wheat varieties (strains) to Ar+ implantation

    International Nuclear Information System (INIS)

    Cui Huanhu; Jing Hua; Ma Aiping; Kang Xiuli; Yang Liping; Huang Mingjing; Ma Buzhou; Shanxi Academy of Agricultural Sciences, Taiyuan

    2005-01-01

    The sensibility of different wheat varieties (strains) to Ar + implantation was studied. The results showed that the survival rate of 21 wheat varieties (strains) at the dose of 6 x 10 16 Ar + /cm 2 could be divided into five groups: surplus sensitive varieties (strains), sensitive varieties (strains), transitional varieties (strains), obtuse varieties (strains) and surplus obtuse varieties (strains). The sensibility of wheat varieties (strains) to Ar + injection is high-moisture-fertility wheat varieties (strains) > medium-moisture-fertility wheat varieties (strains) > dry land wheat varieties (strains). The study has provided theoretical basis in induced mutation medial lethal dose of different wheat varieties (strains) to Ar + implantation. (authors)

  8. Salting kinetics and salt diffusivities in farmed Pantanal caiman muscle Cinética de salga e difusividades de sal em carne de jacaré do Pantanal criado em cativeiro

    Directory of Open Access Journals (Sweden)

    Vânia Regina Nicoletti Telis

    2003-04-01

    Full Text Available The legal Pantanal caiman (Caiman crocodilus yacare farming, in Brazil, has been stimulated and among meat preservation techniques the salting process is a relatively simple and low-cost method. The objective of this work was to study the sodium chloride diffusion kinetics in farmed caiman muscle during salting. Limited volumes of brine were employed, with salting essays carried at 3, 4 and 5 brine/muscle ratios, at 15%, 20% and 25% w/w brine concentrations, and brine temperatures of 10, 15 and 20ºC. The analytical solution of second Fick's law considering one-dimensional diffusion through an infinite slab in contact with a well-stirred solution of limited volume was used to calculate effective salt diffusion coefficients and to predict the sodium chloride content in the fillets. A good agreement was obtained between the considered analytical model and experimental data. Salt diffusivities in fillets were found to be in the range of 0.47x10-10 to 9.62x10-10 m²/s.A criação de jacaré do Pantanal (Caiman crocodilus yacare em cativeiro tem sido estimulada, e entre as técnicas de processamento de sua carne, a salga é um processo de conservação relativamente simples e de baixo custo. O objetivo deste trabalho foi estudar a cinética de difusão de cloreto de sódio em carne de jacaré do Pantanal criado em cativeiro, durante a salga úmida. Foram utilizados volumes limitados de salmoura e os experimentos foram realizados com relações salmoura/músculo de 3, 4 e 5, com concentrações de salmoura de 15%, 20% e 25% em peso e temperaturas de 10, 15 e 20ºC. A solução analítica da segunda lei de Fick, considerando difusão unidimensional em uma placa infinita em contato com uma solução bem agitada de volume limitado, foi utilizada para calcular os coeficientes de difusão efetivos de sal e estimar o conteúdo de cloreto de sódio nos filés. Obteve-se boa concordância entre o modelo analítico considerado e os dados experimentais. As

  9. Tibetan tectonics from 40Ar/39Ar analysis of a single K-feldspar sample

    International Nuclear Information System (INIS)

    Richter, F.M.; Lovera, O.M.; Harrison, T.M.; Copeland, P.

    1991-01-01

    40 Ar/ 39 Ar data on an alkali feldspar sample from the Quxu pluton, Gangdese batholith, southern Tibet, allow a detailed assessment of unroofing and uplift history between 35 and 18 Ma. The 39 Ar Arrhenius plot for this sample shows departures from a linear relationship between the effective diffusion parameter, log(D/r 2 ), and reciprocal temperature, which we interpret to be the result of a distribution of distinct diffusion-domain sizes. We use an alternative way of plotting the Arrhenius data that exhibits domain size versus cumulative % 39 Ar released during step heating. The 40 Ar/ 39 Ar age spectrum of the sample has features, such as local age plateaus, that are most easily explained in terms of the distinctive closure age of particular domains. The fact that the same distribution of diffusion-domain sizes explains both the Arrhenius data and the age spectrum is an indication that the diffusion properties operating in the laboratory are those of the sample while it was in its natural environment. Modelling of the age spectrum with a distribution of domain sizes results in the recovery of a continuous cooling-history segment rather than a single time-temperature datum. We demonstrate the robustness of the cooling-curve determination by showing the large misfits to the age spectrum that arise from relatively small changes in the cooling history. The best-fit cooling curve for the Quxu sample shows a decreasing rate of cooling in the time interval 35-18 Ma, followed by a very rapid cooling beginning at about 18 Ma. We have used a thermal model for the conductive cooling of an unroofing pluton to estimate the rate of unroofing required to explain the Quxu cooling curve, and find that in the 35-20 Ma time interval, the primary control of the thermal evolution is the conductive loss of magmatic heat with little or no unroofing (unroofing rates of approximately 0.05 mm/yr) followed by a brief period (<5 Ma) of very rapid unroofing with rates of order 2 mm

  10. Parâmetros biométricos do trato genital masculino de caprinos sem raça definida (SRD criados no semi-árido nordestino durante o período seco e chuvoso

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Nascimento Campos

    2003-01-01

    Full Text Available Este trabalho teve por objetivo comparar a morfometria do trato genital masculino caprino entre a época seca e chuvosa. Foram coletados 46 e 52 genitais de machos caprinos na época seca e chuvosa, respectivamente. Testículos foram identificados em direito ou esquerdo, mensurados quanto ao comprimento, espessura e diâmetro. Os epidídimos foram pesados. Ductos deferentes e o pênis foram mensurados quanto ao comprimento. As vesículas seminais foram identificadas em direita ou esquerda, pesadas individualmente, e mensuradas quanto ao comprimento, largura e espessura. Os parâmetros de peso, largura, espessura e comprimento das diferentes estruturas foram submetidos ao teste t de Student a 5,00% de probabilidade. Os resultados demonstraram que houve diferença significativa entre os parâmetros mensurados no período seco e chuvoso (P<0,05, com exceção da vesícula seminal. Também foi demonstrado que os maiores valores foram encontrados no período seco, com exceção do ducto deferente. Concluiu-se que os parâmetros biométricos de caprinos SRD da região semi-árida do Nordeste do Brasil são inferiores aos citados na literatura internacional. Estes resultados demonstraram que o processo de adaptação de raças exóticas trazidas pelos colonizadores portugueses ao longo destes 500 anos provocou uma diminuição do porte dos mesmos, tornando-os mais rústicos, porém com características reprodutivas normais, mesmo em épocas de escassez de alimentos.

  11. Experimental system to measure excitation cross-sections by electron impact. Measurements for ArI and ArII

    International Nuclear Information System (INIS)

    Blanco, F.; Sanchez, J.A.; Aguilera, J.A.; Campos, J.

    1989-01-01

    An experimental set-up to measure excitation cross-section of atomic and molecular levels by electron impact based on the optical method is reported. We also present some measurements on the excitation cross-section for ArI 5p'(1/2)0 level, and for simultaneous ionization and excitation of Ar leading to ArII levels belonging to the 3p 4 4p and 3p 4 4d configurations. (Author)

  12. An 40 Ar- 39 Ar study of the Cape Verde hot spot

    DEFF Research Database (Denmark)

    Holm, Paul Martin; Grandvuinet, Tanja; Wilson, James Richard

    2008-01-01

    The 40Ar-39Ar analyses of 28 groundmass separates from volcanic rocks from the islands of Santiago, Sal, and São Vicente, Cape Verde archipelago, are presented. The new age data record the volcanic evolution for Santiago from 4.6 to 0.7 Ma, for Sal from around 15 to 1.1 Ma, and for São Vicente from...... Cretaceous age for limestones deposited on the seafloor and later uplifted. The Cape Verde Rise is indicated to have fully formed in the early Miocene around 22 Ma, accompanied by the initial alkaline volcanism. Considerable volcanism on Sal, Boa Vista, and Maio took place in the Miocene and Pliocene...

  13. Acoustic resonance spectroscopy (ARS): ARS300 operations manual, software version 2.01

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-07-25

    Acoustic Resonance Spectroscopy (ARS) is a nondestructive evaluation technology developed at the Los Alamos National Laboratory. The ARS technique is a fast, safe, and nonintrusive technique that is particularly useful when a large number of objects need to be tested. Any physical object, whether solid, hollow, or fluid filled, has many modes of vibration. These modes of vibration, commonly referred to as the natural resonant modes or resonant frequencies, are determined by the object`s shape, size, and physical properties, such as elastic moduli, speed of sound, and density. If the object is mechanically excited at frequencies corresponding to its characteristic natural vibrational modes, a resonance effect can be observed when small excitation energies produce large amplitude vibrations in the object. At other excitation frequencies, i.e., vibrational response of the object is minimal.

  14. Laser-fusion 40Ar/39Ar Ages of Darwin Impact Glass

    Science.gov (United States)

    Lo, Ching-Hua; Howard, Kieren T.; Chung, Sun-Lin; Meffre, Sebastien

    2002-11-01

    Three samples of Darwin Glass, an impact glass found in Tasmania, Australia at the edge of the Australasian tektite strewn field were dated using the 40Ar/39Ar single-grain laser fusion technique, yielding isochron ages of 796-815 ka with an overall weighted mean of 816 ± 7 ka. These data are statistically indistinguishable from those recently reported for the Australasian tektites from Southeast Asia and Australia (761-816 ka; with a mean weighted age of 803 ± 3 ka). However, considering the compositional and textural differences and the disparity from the presumed impact crater area for Australasian tektites, Darwin Glass is more likely to have resulted from a distinct impact during the same period of time.

  15. Photon counting arrays for AO wavefront sensors

    CERN Document Server

    Vallerga, J; McPhate, J; Mikulec, Bettina; Clark, Allan G; Siegmund, O; CERN. Geneva

    2005-01-01

    Future wavefront sensors for AO on large telescopes will require a large number of pixels and must operate at high frame rates. Unfortunately for CCDs, there is a readout noise penalty for operating faster, and this noise can add up rather quickly when considering the number of pixels required for the extended shape of a sodium laser guide star observed with a large telescope. Imaging photon counting detectors have zero readout noise and many pixels, but have suffered in the past with low QE at the longer wavelengths (>500 nm). Recent developments in GaAs photocathode technology, CMOS ASIC readouts and FPGA processing electronics have resulted in noiseless WFS detector designs that are competitive with silicon array detectors, though at ~40% the QE of CCDs. We review noiseless array detectors and compare their centroiding performance with CCDs using the best available characteristics of each. We show that for sub-aperture binning of 6x6 and greater that noiseless detectors have a smaller centroid error at flu...

  16. Adesao ao guia alimentar para populacao brasileira

    Directory of Open Access Journals (Sweden)

    Eliseu Verly Junior

    2013-12-01

    Full Text Available OBJETIVO : Analisar a adesão ao Guia Alimentar para População Brasileira. MÉTODOS : Amostra composta por participantes do Inquérito de Saúde de São Paulo (n = 1.661 que preencheram dois recordatórios de 24 horas. Foi utilizado modelo bivariado de efeito misto para a razão entre o consumo de energia do grupo de alimentos e o consumo calórico total. A razão estimada foi utilizada para calcular o percentual de indivíduos com consumo abaixo ou acima da recomendação. RESULTADOS : Pelo menos 80,0% da população consome abaixo do recomendado para: leite e derivados; frutas e sucos de frutas; e cereais, tubérculos e raízes; aproximadamente 60,0% para legumes e verduras; 30,0% para feijões; e 8,0% para carnes e ovos. Adolescentes apresentaram a maior inadequação para legumes e verduras (90,0%, e o estrato de maior renda foi associado à menor inadequação para óleos, gorduras e sementes oleaginosas (57,0%. CONCLUSÕES : Foi observado consumo inadequado dos grupos de alimentos relacionados com aumento do risco de doenças crônicas.

  17. Toxicologia do tolueno: aspectos relacionados ao abuso

    Directory of Open Access Journals (Sweden)

    Forster Letícia M.K.

    1994-01-01

    Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônico

  18. Toxicologia do tolueno: aspectos relacionados ao abuso

    Directory of Open Access Journals (Sweden)

    Letícia M.K. Forster

    1994-04-01

    Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônico

  19. Optical characteristics of a RF DBD plasma jet in various {Ar}/ {O}_{2}Ar/O2 mixtures

    Science.gov (United States)

    Falahat, A.; Ganjovi, A.; Taraz, M.; Ravari, M. N. Rostami; Shahedi, A.

    2018-02-01

    In this paper, using the optical emission spectroscopy (OES) technique, the optical characteristics of a radiofrequency (RF) plasma jet are examined. The Ar/O2 mixture is taken as the operational gas and, the Ar percentage in the Ar/O2 mixture is varied from 70% to 95%. Using the optical emission spectrum analysis of the RF plasma jet, the excitation temperature is determined based on the Boltzmann plot method. The electron density in the plasma medium of the RF plasma jet is obtained by the Stark broadening of the hydrogen Balmer H_{β }. It is mostly seen that, the radiation intensity of Ar 4p→ 4s transitions at higher argon contributions in Ar/O2 mixture is higher. It is found that, at higher Ar percentages, the emission intensities from atomic oxygen (O) are higher and, the line intensities from the argon atoms and ions including O atoms linearly increase. It is observed that the quenching of Ar^{*} with O2 results in higher O species with respect to O2 molecules. In addition, at higher percentages of Ar in the Ar/O2 mixture, while the excitation temperature is decreased, the electron density is increased.

  20. 40Ar/39Ar dating and paleo-magnetism of traps from Ethiopia, Deccan and Siberia

    International Nuclear Information System (INIS)

    Hofmann, C.

    1997-01-01

    Recent studies have shown that major flood basalt provinces have been emplaced as short events (∼ 1 Myr), more or less synchronous with climatic crises and mass extinctions. We present new geochronologic ( 40 Ar/ 39 Ar) and magneto-stratigraphic results for the Ethiopian traps, one of the last remaining flood basalts for which little of such data were available. The ages obtained in a 2000 m thick section are indistinguishable. Moreover, magneto-stratigraphy reveals a simple 3-chron reverse-normal-reverse sequence. Although magnetic chrons cannot be yet unambiguously identified, there is more likelihood for the normal sub-chron in the main basaltic pile to correspond to 11N, supporting a brief duration (less than 1.5 Ma). The Ethiopian traps erupted near 30 Ma at or near the time of the cold and dry climate, major Antarctic ice sheet advance, and the largest sea-level drop in the Tertiary. Bhandari et al. (GRL, 1995) have discovered inter-traps sediments with a triple iridium anomaly in a series of seven basaltic lava flows in the Kutch area of the North Western Deccan traps of India. Plagioclases from three flows above the iridium bearing sediments yield 39 Ar/ 40 Ar plateau ages near 65.0 Ma: these flows have unambiguously reversed magnetic polarity interpreted as chron 29R. As a preliminary summary, evidence of the KTB asteroid impact is confirmed in the Deccan traps, showing that they are coeval events in a general sense (in a Ma long window) though clearly with vastly different time constants. This is compatible with paleontologic evidence of two scales of extinctions, one quasi-instantaneous and the other on the order of 10 5 to 10 6 yrs. Clearly, the impact cannot have caused trap eruptions. On the other hand, the exact age and significance of the lower flows more altered remains to be analyzed further as they pertained to the much debated question of duration of Deccan trap volcanism. (author)

  1. Spatial autocorrelation method using AR model; Kukan jiko sokanho eno AR model no tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, H; Obuchi, T; Saito, T [Iwate University, Iwate (Japan). Faculty of Engineering

    1996-05-01

    Examination was made about the applicability of the AR model to the spatial autocorrelation (SAC) method, which analyzes the surface wave phase velocity in a microtremor, for the estimation of the underground structure. In this examination, microtremor data recorded in Morioka City, Iwate Prefecture, was used. In the SAC method, a spatial autocorrelation function with the frequency as a variable is determined from microtremor data observed by circular arrays. Then, the Bessel function is adapted to the spatial autocorrelation coefficient with the distance between seismographs as a variable for the determination of the phase velocity. The result of the AR model application in this study and the results of the conventional BPF and FFT method were compared. It was then found that the phase velocities obtained by the BPF and FFT methods were more dispersed than the same obtained by the AR model. The dispersion in the BPF method is attributed to the bandwidth used in the band-pass filter and, in the FFT method, to the impact of the bandwidth on the smoothing of the cross spectrum. 2 refs., 7 figs.

  2. A Framework for Designing Collaborative Learning Environments Using Mobile AR

    Science.gov (United States)

    Cochrane, Thomas; Narayan, Vickel; Antonczak, Laurent

    2016-01-01

    Smartphones provide a powerful platform for augmented reality (AR). Using a smartphone's camera together with the built in GPS, compass, gyroscope, and touch screen enables the real world environment to be overlaid with contextual digital information. The creation of mobile AR environments is relatively simple, with the development of mobile AR…

  3. Influence of Ar addition on ozone generation in nonthermal plasmas

    International Nuclear Information System (INIS)

    Chen, Hsin Liang; Lee, How Ming; Chen, Shiaw Huei; Wei, Ta Chin; Chang, Moo Been

    2010-01-01

    Inconsistency regarding the influence of Ar addition on ozone generation in a corona discharge has been found in relevant studies. Unlike in the literature to date, a dielectric barrier discharge (DBD) reactor is adopted in this study. In addition to clarifying whether using Ar as an additive would lead to different types of behavior in a DBD and a corona discharge, this study is also motivated to explore the possible causes leading to the inconsistency. The experimental results show that adding Ar into the O 2 plasma would lead to the same influence on ozone generation in the DBD and corona discharge. Moreover, all types of controversial behavior caused by Ar addition reported in the relevant literature are observed in this study as well, indicating that the results of this study are comprehensive enough to interpret the inconsistency. By examining the experimental results in detail, it is found that the controversial influences of Ar addition on ozone generation were found using different assumptions. At a fixed applied voltage, the ozone generation might increase as the Ar concentration is increased, which results from a higher discharge power. Nevertheless, for a certain specific input energy (the ratio of discharge power to gas flow rate), the ozone concentration is lower as the Ar concentration is increased. Therefore, adding Ar is not a good way to enhance ozone generation from an economic point of view.

  4. A phase one AR/C system design

    Science.gov (United States)

    Kachmar, Peter M.; Polutchko, Robert J.; Matusky, Martin; Chu, William; Jackson, William; Montez, Moises

    1991-01-01

    The Phase One AR&C System Design integrates an evolutionary design based on the legacy of previous mission successes, flight tested components from manned Rendezvous and Proximity Operations (RPO) space programs, and additional AR&C components validated using proven methods. The Phase One system has a modular, open architecture with the standardized interfaces proposed for Space Station Freedom system architecture.

  5. Electron temperatures of inductively coupled Cl2-Ar plasmas

    International Nuclear Information System (INIS)

    Fuller, N.C.M.; Donnelly, Vincent M.; Herman, Irving P.

    2002-01-01

    Trace rare gases optical emission spectroscopy has been used to measure the electron temperature, T e , in a high-density inductively coupled Cl 2 -Ar plasma at 18 mTorr as function of the 13.56 MHz radio frequency power and Ar fraction. Only the Kr and Xe emission lines were used to determine T e , because of evidence of radiation trapping when the Ar emission lines were also used for larger Ar fractions. At 600 W (10.6 W cm-2), T e increases from ∼4.0±0.5 eV to ∼6.0±2.0 eV as the Ar fraction increases from 1% to 96%. In the H (inductive, bright) mode, T e , for a 'neat' chlorine plasma (including 1% of each He/Ne/Ar/Kr/Xe) increases only slightly from ∼3.8 to 4.0 eV as power increases from 450 to 750 W. This increase is much larger for larger Ar fractions, such as from ∼4.0 to 7.3 eV for 78% Ar. Most of these effects can be understood using the fundamental particle balance equation

  6. AR Expression in Breast Cancer CTCs Associates with Bone Metastases.

    Science.gov (United States)

    Aceto, Nicola; Bardia, Aditya; Wittner, Ben S; Donaldson, Maria C; O'Keefe, Ryan; Engstrom, Amanda; Bersani, Francesca; Zheng, Yu; Comaills, Valentine; Niederhoffer, Kira; Zhu, Huili; Mackenzie, Olivia; Shioda, Toshi; Sgroi, Dennis; Kapur, Ravi; Ting, David T; Moy, Beverly; Ramaswamy, Sridhar; Toner, Mehmet; Haber, Daniel A; Maheswaran, Shyamala

    2018-04-01

    Molecular drivers underlying bone metastases in human cancer are not well understood, in part due to constraints in bone tissue sampling. Here, RNA sequencing was performed of circulating tumor cells (CTC) isolated from blood samples of women with metastatic estrogen receptor (ER) + breast cancer, comparing cases with progression in bone versus visceral organs. Among the activated cellular pathways in CTCs from bone-predominant breast cancer is androgen receptor (AR) signaling. AR gene expression is evident, as is its constitutively active splice variant AR-v7. AR expression within CTCs is correlated with the duration of treatment with aromatase inhibitors, suggesting that it contributes to acquired resistance to endocrine therapy. In an established breast cancer xenograft model, a bone-tropic derivative displays increased AR expression, whose genetic or pharmacologic suppression reduces metastases to bone but not to lungs. Together, these observations identify AR signaling in CTCs from women with bone-predominant ER + breast cancer, and provide a rationale for testing androgen inhibitors in this subset of patients. Implications: This study highlights a role for the AR in breast cancer bone metastasis, and suggests that therapeutic targeting of the AR may benefit patients with metastatic breast cancer. Mol Cancer Res; 16(4); 720-7. ©2018 AACR . ©2018 American Association for Cancer Research.

  7. 37Ar monitoring techniques and on-site inspection system

    International Nuclear Information System (INIS)

    Duan Rongliang; Chen Yinliang; Li Wei; Wang Hongxia; Hao Fanhua

    2001-01-01

    37 Ar is separated, purified and extracted from air sample with a low temperature gas-solid chromatographic purifying method, prepared into a radioactive measurement source and its radioactivity is measured with a proportional counter. Based on the monitoring result, a judgement can be made if an nuclear explosion event has happened recently in a spectabilis area. A series of element techniques that are associated the monitoring of the trace element 37 Ar have been investigated and developed. Those techniques include leaked gas sampling, 37 Ar separation and purification, 37 Ar radioactivity measurement and the on-site inspection of 37 Ar. An advanced 37 Ar monitoring method has been developed, with which 200 liters of air can be treated in 2 hours with sensitivity of 0.01 Bq/L for 37 Ar radioactivity measurement. A practical 37 Ar On-site Inspection system has been developed. This research work may provide technical and equipment support for the verification protection, verification supervision and CTBT verification

  8. 40Ar/39Ar geochronology of the El Teniente porphyry copper deposit

    International Nuclear Information System (INIS)

    Maksaev, V; Munizaga, F; McWilliams, M; Thiele, K; Arevalo, A; Zuniga, P; Floody, R

    2001-01-01

    breccias. Phyllic alteration primarily occurs as quartz-sericite haloes of quartz-sulfide-sulfate veinlets within the perimeter of the orebody, and slightly overprints potassic alteration. Propylitic alteration occurs largely peripheral to ore-grade rock. The relatively restricted development of phyllic alteration and the occurrence of the central breccia conflict with the classic porphyry copper model of Lowell and Gilbert (1970), but El Teniente may be regarded as a 'variation on a theme' of the classic model, as suggested by Gustafson and Hunt (1975). The exceedingly large size of the El Teniente deposit, coupled with its apparently young mineralization age prompted us to initiate a systematic 40 Ar/ 39 Ar study whose goals are to determine the age(s) of the hydrothermal event(s) that produced such a remarkable copper concentration and ultimately to estimate the duration of the hydrothermal activity at El Teniente. This is particularly relevant to an understanding of the processes that formed super-giant high-grade copper deposits in the Chilean Andes and elsewhere. We report here 32 total fusion 40 Ar/ 39 Ar ages from sericite and biotite from different lithologic units of El Teniente and five step-heating 40 Ar- 39 Ar ages of samples previously dated using conventional K-Ar methods (Cuadra, 1986) (au)

  9. Sensibilidade de estirpes de Bradyrhizobium ao glyphosate

    Directory of Open Access Journals (Sweden)

    Rodrigo Josemar Seminoti Jacques

    2010-02-01

    Full Text Available A aplicação do glyphosate sobre a soja resistente a este herbicida pode causar prejuízos à simbiose com o rizóbio. O objetivo deste trabalho foi avaliar a sensibilidade ao herbicida glyphosate de três estirpes de Bradyrhizobium recomendadas para a produção de inoculantes de sementes de soja no Brasil. Avaliou-se o efeito das concentrações de 0,0; 5,4; 10,8; 21,6 e 43,2 µg L-1 do ingrediente ativo do glyphosate [N-(fosfonometil glicina] no meio YM líquido sobre o crescimento de B. japonicum (estirpe SEMIA 5079 e de B. elkanii (estirpe SEMIA 5019 e estirpe SEMIA 587, por meio de leituras das densidades óticas e geração de curvas de crescimento. As reduções de crescimento na presença da menor concentração do glyphosate foram de 18% para SEMIA 5079, 29% para SEMIA 5019 e de 35% para SEMIA 587, sendo, de modo geral, quanto maior a concentração do herbicida no meio de cultura maior a inibição do crescimen­to. As estirpes apresentaram sensibilidade diferencial somente às concentrações mais baixas do glyphosate; nesse caso, foi possível determinar a seguinte ordem de sensibilidade: SEMIA 587 > SEMIA 5019 > SEMIA 5079. Essa sensibilidade diferencial é dependente da concentração do herbicida, pois na presença de 43,2 µg L-1 todas as estirpes tiveram seu crescimento severamente reduzido, não havendo diferença entre elas.

  10. Androgen Receptor (AR) Physiological Roles in Male and Female Reproductive Systems: Lessons Learned from AR-Knockout Mice Lacking AR in Selective Cells1

    Science.gov (United States)

    Chang, Chawnshang; Lee, Soo Ok; Wang, Ruey-Sheng; Yeh, Shuyuan; Chang, Ta-Min

    2013-01-01

    ABSTRACT Androgens/androgen receptor (AR) signaling is involved primarily in the development of male-specific phenotypes during embryogenesis, spermatogenesis, sexual behavior, and fertility during adult life. However, this signaling has also been shown to play an important role in development of female reproductive organs and their functions, such as ovarian folliculogenesis, embryonic implantation, and uterine and breast development. The establishment of the testicular feminization (Tfm) mouse model exploiting the X-linked Tfm mutation in mice has been a good in vivo tool for studying the human complete androgen insensitivity syndrome, but this mouse may not be the perfect in vivo model. Mouse models with various cell-specific AR knockout (ARKO) might allow us to study AR roles in individual types of cells in these male and female reproductive systems, although discrepancies are found in results between labs, probably due to using various Cre mice and/or knocking out AR in different AR domains. Nevertheless, no doubt exists that the continuous development of these ARKO mouse models and careful studies will provide information useful for understanding AR roles in reproductive systems of humans and may help us to develop more effective and more specific therapeutic approaches for reproductive system-related diseases. PMID:23782840

  11. Photoionization of Ar2 at high resolution

    International Nuclear Information System (INIS)

    Dehmer, P.M.

    1982-01-01

    The relative photoionization cross section of Ar 2 was determined at a resolution of 0.07 A in the wavelength region from 800 to 850 A using a new photoionization mass spectrometer that combines a high intensity helium continuum lamp with a free supersonic molecular beam source. In the region studied, the photoionization cross section is dominated by autoionization of molecular Rydberg states, and the structure is diffuse owing to the combined effects of autoionization and predissociation. The molecular photoionization spectrum is extremely complex and shows little resemblence either to the corresponding atomic spectrum (indicating that the spectrum of the dimer is not simply a perturbed atomic spectrum) or to the molecular absorption spectrum at longer wavelengths. The regular vibrational progressions seen at longer wavelengths are absent above the first ionization potential. Detailed spectroscopic analysis is possible for only a small fraction of the observed features; however, vibrational intervals of 50--100 cm -1 suggest that some of the Rydberg states have B 2 Pi/sub 3/2g/ ionic cores. A comparison of the absorption and photoionization spectra shows that, at wavelengths shorter than approx.835 A, many of the excited states decay via mechanisms other than autoionization

  12. 40Ar/39Ar ages of adularia from the Golden Cross, Neavesville, and Komata epithermal deposits, Hauraki Goldfield, New Zealand

    International Nuclear Information System (INIS)

    Mauk, J.L.; Hall, C.M.

    2004-01-01

    New 40 Ar/ 39 Ar ages of adularia from three epithermal vein deposits in the Hauraki Goldfield constrain when these deposits formed. Adularia from veins at Neavesville has 40 Ar/ 39 Ar plateau and isochron ages of 6.89 ± 0.02 and 6.86 ± 0.02 Ma, respectively, similar to the 40 Ar/ 39 Ar plateau and isochron ages of adularia from veins at Golden Cross of 6.96 ± 0.04 and 6.93 ± 0.03 Ma, respectively. In contrast, Komata mineralisation formed at 5.99 ± 0.02 to 6.07 ± 0.03 Ma, based on the 40 Ar/ 39 Ar isochron and plateau ages of the adularia in these veins, similar to the previously reported 6.0 Ma age of mineralisation at Waihi/Favona. These preliminary data suggest that mineralisation in the Hauraki Goldfields occurred episodically. (author). 19 refs., 3 figs., 1 tab

  13. Androgen Receptor Variant AR-V9 Is Coexpressed with AR-V7 in Prostate Cancer Metastases and Predicts Abiraterone Resistance.

    Science.gov (United States)

    Kohli, Manish; Ho, Yeung; Hillman, David W; Van Etten, Jamie L; Henzler, Christine; Yang, Rendong; Sperger, Jamie M; Li, Yingming; Tseng, Elizabeth; Hon, Ting; Clark, Tyson; Tan, Winston; Carlson, Rachel E; Wang, Liguo; Sicotte, Hugues; Thai, Ho; Jimenez, Rafael; Huang, Haojie; Vedell, Peter T; Eckloff, Bruce W; Quevedo, Jorge F; Pitot, Henry C; Costello, Brian A; Jen, Jin; Wieben, Eric D; Silverstein, Kevin A T; Lang, Joshua M; Wang, Liewei; Dehm, Scott M

    2017-08-15

    Purpose: Androgen receptor (AR) variant AR-V7 is a ligand-independent transcription factor that promotes prostate cancer resistance to AR-targeted therapies. Accordingly, efforts are under way to develop strategies for monitoring and inhibiting AR-V7 in castration-resistant prostate cancer (CRPC). The purpose of this study was to understand whether other AR variants may be coexpressed with AR-V7 and promote resistance to AR-targeted therapies. Experimental Design: We utilized complementary short- and long-read sequencing of intact AR mRNA isoforms to characterize AR expression in CRPC models. Coexpression of AR-V7 and AR-V9 mRNA in CRPC metastases and circulating tumor cells was assessed by RNA-seq and RT-PCR, respectively. Expression of AR-V9 protein in CRPC models was evaluated with polyclonal antisera. Multivariate analysis was performed to test whether AR variant mRNA expression in metastatic tissues was associated with a 12-week progression-free survival endpoint in a prospective clinical trial of 78 CRPC-stage patients initiating therapy with the androgen synthesis inhibitor, abiraterone acetate. Results: AR-V9 was frequently coexpressed with AR-V7. Both AR variant species were found to share a common 3' terminal cryptic exon, which rendered AR-V9 susceptible to experimental manipulations that were previously thought to target AR-V7 uniquely. AR-V9 promoted ligand-independent growth of prostate cancer cells. High AR-V9 mRNA expression in CRPC metastases was predictive of primary resistance to abiraterone acetate (HR = 4.0; 95% confidence interval, 1.31-12.2; P = 0.02). Conclusions: AR-V9 may be an important component of therapeutic resistance in CRPC. Clin Cancer Res; 23(16); 4704-15. ©2017 AACR . ©2017 American Association for Cancer Research.

  14. Fatores associados aos comportamentos de risco à saúde entre adolescentes brasileiros: uma revisão integrativa

    Directory of Open Access Journals (Sweden)

    Luciana Ramos de Moura

    2018-04-01

    Full Text Available RESUMO Objetivo: Identificar o conhecimento sobre fatores associados aos comportamentos de risco para a saúde entre adolescentes brasileiros. Método: Revisão integrativa da literatura nas bases de dados Cochrane, IBECS, LILACS, MEDLINE e SciELO, em relação aos comportamentos de risco recomendados pelo Centro de Controle e Prevenção de Doenças. Resultados: Analisaram-se 37 estudos, com predomínio do comportamento sexual de risco, uso do tabaco e comportamento violento. O avançar da idade favoreceu o sexo desprotegido, o uso do álcool e tabaco. A influência familiar e de amigos relacionou-se com tabagismo e alcoolismo. O sexo masculino envolveu-se mais em situações de violência e o sexo feminino associou-se à inatividade física. Pertencer a classes econômicas mais baixas relacionou-se com sexo desprotegido, inatividade física, comportamento alimentar não saudável e violência. Estudar em escola privada referiu-se ao comportamento alimentar não saudável. Conclusão: Comportamentos de risco relacionaram-se a fatores sociais, econômicos e familiares e tendem a se aglomerar.

  15. Ar-40/Ar-39 age determinations for the Rotoiti eruption, New Zealand

    Science.gov (United States)

    Flude, S.; Storey, M.

    2013-12-01

    The contemporaneous Rotoiti and Earthquake Flat ignimbrites, erupted from the Taupo Volcanic zone, New Zealand, form a distinctive tephrostratigraphic horizon in the Southern Pacific. Radioisotopic dating results for these eruptions remain controversial, with published ages ranging from 35.1 × 2.8 ka [1] to 71 × 6 ka [2], with 61.0 × 1.5 ka [3] often being cited as the most widely accepted age. These eruptions are difficult to date as their age is near the limit for various radiometric dating techniques, which are complicated by a large proportion of inherited material (xenocrysts) and a lack of phases suitable for dating. Glass-bearing plutonic blocks erupted with the Rotoiti and Earthquake Flat ignimbrites have previously been interpreted as deriving from a slowly cooled and incompletely solidified magma body that was sampled by the eruptions. They contain large vugs lined with euhedral quartz, sanidine and biotite crystals, indicating that these crystals grew in a gas or aqueous fluid rich environment and are interpreted to have formed shortly before or during eruption. Here we will present Ar-40/Ar-39 ages for sanidines and biotites extracted from vugs in lithic blocks erupted as part of the Earthquake Flat ignimbrite. We show that, even for vug-lining material, inherited ages remain a problem and are the likely source of the wide variation in published radiometric ages. Nevertheless, many of the Ar-40/Ar-39 ages are much younger than the 61 ka age [3] and are more consistent with the recent stratigraphic, C-14 and U-238/Th-230+(U-Th)/He ages that have been suggested (e.g. [4,5]). 1. Whitehead, N. & Ditchburn, R. New Zealand Journal of Geology and Geophysics 37, 381-383 (1994). 2. Ota, Y., Omura, A. & Iwata, H. New Zealand Journal of Geology and Geophysics 32, 327-331 (1989). 3. Wilson, C. J. N. et al. Quaternary Science Reviews 26, 1861-1870 (2007). 4. Molloy, C., Shane, P. & Augustinus, P. Geological Society of America Bulletin 121, 1666-1677 (2009). 5

  16. Suscetibilidade do capim-colonião e de cultivares de milho ao flúor

    Directory of Open Access Journals (Sweden)

    Rimena Ramos Domingues

    2011-01-01

    Full Text Available A emissão de fluoretos à atmosfera oriunda da produção de superfosfatos e de cerâmica tem causado preocupação pelo efeito tóxico às plantas, contudo são poucos os estudos desenvolvidos acerca do problema com espécie de interesse econômico agrícola. Desenvolveu-se o estudo para avaliar o efeito do flúor (F atmosférico em plantas de capim-colonião e de cultivares de milho, utilizando como referência espécies bioindicadoras do tipo sensível e tolerante. As plantas foram expostas à contaminação pelo F atmosférico por curtos períodos durante 32 dias em sistema de nebulização com 0,16 mol L-1 de ácido fluorídrico no ambiente interno de uma câmara (~0,20 mmol m-3 de F, havendo um controle não exposto, com quatro repetições. A exposição das plantas ao F causou aumento da concentração do elemento nas folhas até 60 mg kg-1 para o capim-colonião, e entre 100 mg kg-1 nas folhas novas e 170 mg kg-1 nas folhas velhas para quatro cultivares de milho, o que demonstrou o efeito cumulativo do elemento no ambiente. Sintomas visuais da toxicidade foram observados nas plantas e se caracterizaram pela ocorrência de cloroses e necroses na lâmina foliar. O capim-colonião é uma espécie bastante sensível ao poluente no ar. As cultivares de milho DKB 390 e Ômega 8315 também são mais sensíveis ao F quando comparadas às AG7088 e 2B707. Os teores de clorofila a nas plantas foram mais afetados pelo F em relação aos teores de clorofila b.

  17. AR Signaling in Human Malignancies: Prostate Cancer and Beyond.

    Science.gov (United States)

    Antonarakis, Emmanuel S

    2018-01-18

    The notion that androgens and androgen receptor (AR) signaling are the hallmarks of prostate cancer oncogenesis and disease progression is generally well accepted. What is more poorly understood is the role of AR signaling in other human malignancies. This special issue of Cancers initially reviews the role of AR in advanced prostate cancer, and then explores the potential importance of AR signaling in other epithelial malignancies. The first few articles focus on the use of novel AR-targeting therapies in castration-resistant prostate cancer and the mechanisms of resistance to novel antiandrogens, and they also outline the interaction between AR and other cellular pathways, including PI3 kinase signaling, transcriptional regulation, angiogenesis, stromal factors, Wnt signaling, and epigenetic regulation in prostate cancer. The next several articles review the possible role of androgens and AR signaling in breast cancer, bladder cancer, salivary gland cancer, and hepatocellular carcinoma, as well as the potential treatment implications of using antiandrogen therapies in these non-prostatic malignancies.

  18. The development of AR book for computer learning

    Science.gov (United States)

    Phadung, Muneeroh; Wani, Najela; Tongmnee, Nur-aiynee

    2017-08-01

    Educators need to provide the alternative educational tools to foster learning outcomes of students. By using AR technology to create exciting edutainment experiences, this paper presents how augmented reality (AR) can be applied in the education. This study aims to develop the AR book for tenth grade students (age 15-16) and evaluate its quality. The AR book was developed based on ADDIE framework processes to provide computer learning on software computer knowledge. The content was accorded with the current Thai education curriculum. The AR book had 10 pages in three topics (the first was "Introduction," the second was "System Software" and the third was "Application Software"). Each page contained markers that placed virtual objects (2D animation and video clip). The obtained data were analyzed in terms of average and standard deviation. The validity of multimedia design of the AR book was assessed by three experts in multimedia design. A five-point Likert scale was used and the values were X¯ =4 .84 , S.D. = 1.27 which referred to very high. Moreover, three content experts, who specialize in computer teaching, evaluated the AR book's validity. The values determined by the experts were X¯ =4 .69 , S.D. = 0.29 which referred to very high. Implications for future study and education are discussed.

  19. Developing a chronostratigraphic tool for climatic archives: absolute dating (K/Ar and 40Ar/39Ar) and paleo-magnetism applied to lavas

    International Nuclear Information System (INIS)

    Sasco, Romain

    2015-01-01

    The understanding of climatic mechanisms and rapid climate changes requires a high-resolution, robust, and precise timescale which allows long-distance and multi-archives correlations.An appropriate tool to construct such a timescale is provided by the Earth magnetic field (EMF). The EMF is independent from climatic variations and its past evolution, global at the surface of the Earth, is recorded by most of the geological/climatic archives. Sedimentary sequences provide continuous records of relative intensities of the EMF on timescales usually based on ice core age models or orbital tuning. Lavas, though discontinuously emitted through time, record the absolute intensity of the EMF during their cooling at the surface of the Earth. Lavas are dated using 2 complementary methods: 40 Ar/ 39 Ar and K-Ar, both independent from climatic parameters. Lavas have therefore the potential to deliver tie-points (age - paleo-intensity couples) enabling the time calibration of sedimentary sequences and their transfer onto absolute intensity scale and chronological time scale. This timescale can then be transferred to other climatic archives. The present study focusses on the last 200 ka with lavas sampled from young volcanoes of Ardeche (South Massif Central, France) and recent phases of volcanism in the Canary Islands. Lava flows from Ardeche provided un-exploitable paleo-intensity results and ages with large uncertainties. Therefore, they failed to provide suitable tie-points. However, our geochronological results evidence how crucial the combination of both the K-Ar and 40 Ar/ 39 Ar methods is to test the accuracy and geological meaning of the ages. Ardeche lavas have abundant mantellic and crustal xenoliths, potential carriers of excess 40 Ar*. Our study suggests that the argon excess is located in sites that decrepitate at low temperature (≤600 C). Because 40 Ar/ 39 Ar ages are not affected by excess 40 Ar*, they provide reliable results. The new age dataset indicates

  20. Thermal significance of potassium feldspar K-Ar ages inferred from /sup 40/Ar//sup 39/Ar age spectrum results

    Energy Technology Data Exchange (ETDEWEB)

    Harrison, T.M.; McDougall, I. (Australian National Univ., Canberra. Research School of Earth Sciences)

    1982-10-01

    /sup 40/Ar//sup 39/Ar age spectrum analyses of three microcline separates from the Separation Point Batholith, northwest Nelson, New Zealand, which cooled slowly through the temperature zone of partial radiogenic /sup 40/Ar accumulation are characterized by a linear age increase over the first 65 percent of gas release with the lowest ages corresponding to the time that the samples cooled below about 100/sup 0/C. The last 35 percent of /sup 39/Ar released from the microclines yields plateau ages which reflect the different bulk mineral ages, and correspond to cooling temperatures between about 130 to 160/sup 0/C. Theoretical calculations confirm the likelihood of diffusion gradients in feldspars cooling at rates =< 5/sup 0/C-Ma/sup -1/. Diffusion parameters calculated from the /sup 39/Ar release yield an activation energy, E = 28.8 +- 1.9 kcal-mol/sup -1/, and a frequency factor/grain size parameter, D/sub 0//l/sup 2/ = 5.6sub(-3.9)sup(+14) sec/sup -1/. This Arrhenius relationship corresponds to a closure temperature of 132 +- 13/sup 0/C which is very similar to the independently estimated temperature. From the observed diffusion compensation correlation, this D/sub 0//l/sup 2/ implies an average diffusion half-width of about 3 ..mu..m, similar to the half-width of the perthite lamellae in the feldspars. The results are discussed.

  1. SCExAO: First Results and On-Sky Performance

    Science.gov (United States)

    Currie, Thayne; Guyon, Olivier; Martinache, Frantz; Clergeon, Christophe; McElwain, Michael; Thalmann, Christian; Jovanovic, Nemanja; Singh, Garima; Kudo, Tomoyuki

    2013-01-01

    We present new on-sky results for the Subaru Coronagraphic Extreme Adaptive Optics imager (SCExAO) verifying and quantifying the contrast gain enabled by key components: the closed-loop coronagraphic low-order wavefront sensor (CLOWFS) and focal plane wavefront control ("speckle nulling"). SCExAO will soon be coupled with a high-order, Pyramid wavefront sensor which will yield greater than 90% Strehl ratio and enable 10(exp 6) -10(exp 7) contrast at small angular separations allowing us to image gas giant planets at solar system scales. Upcoming instruments like VAMPIRES, FIRST, and CHARIS will expand SCExAO's science capabilities.

  2. 40Ar/ 39Ar dating of Late Permian evaporites, southeastern New Mexico, USA

    Science.gov (United States)

    Renne, Paul R.; Sharp, Warren D.; Montañez, Isabel P.; Becker, Tim A.; Zierenberg, Robert A.

    2001-12-01

    40Ar/ 39Ar dating of the potassium-magnesium sulfate mineral langbeinite from Permian evaporites of the Salado formation near Carlsbad, New Mexico, provides quantitative evidence that some salts in these deposits have not recrystallized for 251 Myr since deposition. Survival of Permian salts supports the possibility that Bacillus bacteria recovered from nearby halite was isolated in a closed system and represents a sample of uncontaminated Permian life. Local recrystallization of langbeinite and other nearby minerals is also indicated by the dating, suggesting both the need and the opportunity to document closed system behavior more rigorously. The shoaling and desiccation event recorded by the Salado formation began at least 1 Myr before the Permian-Triassic boundary. Temporal correlation of the Salado with the Zechstein evaporites of north-central Europe supports previously inferred regression models for the origin of these deposits. Significant paleoenvironmental change at the Permian-Triassic boundary thus occurred on a time scale more protracted than that implied by geologically instantaneous events such as bolide impacts.

  3. The 40Ar/39Ar age spectrum of a rock from Gerrans Bay, Cornwall

    International Nuclear Information System (INIS)

    Fitch, F.J.; Forster, S.C.; Miller, J.A.

    1984-01-01

    The results of the 40 Ar/ 39 Ar step heating study of a folded and cleaved metasiltstone are presented. The rock comes from the melange of the Roseland area, NE of the Lizard. The age spectrum obtained has two distinct sectors: (i) an older age component giving apparent ages of 521 to 490 Ma and (ii) a younger component with an apparent age of 424 to 410 Ma. The petrography suggests that the former is derived from the more resistant parts of large detrital muscovite flakes, while the latter comes from smaller metamorphic micas aligned along the prominent cleavage and also, in part, from original detrital grains partially or totally overprinted during the metamorphic event. The sediment was probably mid-to late-Ordovician in age. The source rocks appear to have been very largely of late Cambrian/early Arenig age. Folding, age and low-grade regional metamorphism occurred as a result of late Caledonian orogenesis between 424 to 410 Ma. There is no evidence of any Variscan overprint on the age spectrum. Very minor, low energy argon losses appear to have taken place in mid-Mesozoic times but, apart from this, the absence of any major overprint younger than 410 Ma indicates that since the end of the Silurian the rock has suffered only high-level, cold, non-penetrative deformation. (author)

  4. Avaliação da aptidão agrícola das terras como subsídio ao assentamento de famílias rurais, utilizando sistemas de informações geográficas

    Directory of Open Access Journals (Sweden)

    Elisângela Benedet da Silva

    2010-12-01

    Full Text Available Os assentamentos rurais no Brasil foram criados para responder a pressões localizadas e estão marcados pela falta de planejamento prévio de implantação e diagnóstico dos recursos naturais relativos a aptidão agrícola, distribuição das classes de relevo, hidrografia, vegetação e mecanismos de apoio. O objetivo desta pesquisa foi avaliar a aptidão agrícola das terras destinadas ao assentamento de famílias rurais do Instituto Nacional de Colonização e Reforma Agrária (INCRA, aplicando o Sistema de Avaliação da Aptidão Agrícola das Terras (SAAT associado a um Sistema de Informações Geográficas (SIG no Projeto de Assentamento Eldorado dos Carajás (PAEC, localizado no município de Lebon Régis/SC. No desenvolvimento da pesquisa, optou-se por utilizar mapas temáticos em sistemas de informações geográficas (SIG para armazenar e integrar os dados espaciais. O uso do SIG permitiu a análise e integração dos temas com significativa redução de tempo e subjetividade nos cruzamentos. O uso do método forneceu duas respostas básicas ao planejamento de uso dos recursos naturais das áreas rurais: as classes de aptidão agrícola, apontando os principais fatores limitantes e a viabilidade de melhoramento das terras no nível tecnológico B; e, quando confrontado com os mapas temáticos e os dados cadastrais do assentamento, revelou as regularidades e irregularidades no uso das terras em cada parcela imobiliária.

  5. 40Ar/39Ar dating and geochemistry of tholeiitic magmatism related to the early opening of the Central Atlantic rift

    International Nuclear Information System (INIS)

    Sebai, A.; Feraud, G.; Bertrand, H.; Hanes, J.

    1991-01-01

    Tholeiitic effusive and intrusive magnetism from Iberia, Morocco, Algeria and Mali, realted to the early opening of the Central Atlantic rift, was dated by the 40 Ar/ 39 Ar step-heating method. Four plateau ags, rangin from 203.7±2.7 to 197.1±1.8 Ma, were obtained on plagioclase from dykes from theTaoudenni area (Mali) and two lava flows from Morocco. The Messejana dyke (Iberia), which previously yielded discrepant conventional K-Ar dates, did not furnish any 40 Ar/ 39 Ar plateau dates. However, there is a clear inverse relationship between apparent age and K/Ca atio for gas fractions from a plagioclase separate (proportional to the alteration degree) which, combined with dates obtained on amphibole, biotite and pyroxene, allows us to determine an age of around 200 Ma for this body. These data, and those obtained on the Foum Zguid (Morocco) and the Ksi Ksou (Algeria) dykes, give evidence of a brief magmatic event (between 206 and 195 Ma ago) which affected a large area ca. 2500 km long. Trace-element modelling shows that most of these formations originated from a homogeneous, enriched, source material. Such a brief magmatic episode related to the opening of a continental rift is in agreement with findings in other magmatic provinces (e.g. the Deccan traps and the Red Sea rift, precisely dated by the 40 Ar/ 39 Ar method as well). (orig.)

  6. Arsénico en el agua de bebida: un problema de salud pública Arsênio na água de beber: um problema de saúde pública

    Directory of Open Access Journals (Sweden)

    Alexandra Galetovic Carabantes

    2003-12-01

    Full Text Available La presencia de arsénico en el ambiente es un problema de salud pública debido a que se trata de un evento de alta frecuencia que ha sido detectado en países como Argentina, Brasil, Chile, China, India, México y Taiwán, entre otros. El arsénico fue clasificado por la International Agency for Research on Cancer (IARC, como un agente carcinogénico para humanos con base en estudios epidemiológicos que relacionan la ingestión de arsénico en el agua de bebida y cáncer en la piel y estudios ocupacionales que relacionan la exposición al arsénico y cáncer de pulmón. La Organización Mundial de la Salud (OMS recomienda um valor orientador para agua de bebida de 10 mg As/L. Por su parte la Environmental Protection Agency (EPA, considerando estimativas de riesgo realizadas utilizando modelos estadísticos basados en observaciones en humanos y extrapolando los datos para concentraciones inferiores a 50 µg/L, reducirá el valor guía para arsénico en el agua de bebida de 50 µg/L para 10 µg/L. La utilización de biomarcadores permite el desarrollo de la epidemiología molecular que promete ser una herramienta que ayudará a detectar efectos tempranos en poblaciones expuestas, permitiendo la prevención de efectos nocivos considerando las características genéticas de las poblaciones.A presença de arsênio no ambiente é um problema de saúde pública por ser um evento de alta freqüência detectado em países como Argentina, Brasil, Chile, China, Índia, México e Taiwan, entre outros. O arsênio foi classificado pela Agência Internacional de Pesquisa sobre Câncer (IARC, como um agente carcinogênico para humanos com base em estudos epidemiológicos que relacionam a ingestão de arsênico na água para consumo humano e câncer na pele e estudos ocupacionais que relacionam a exposição ao arsênico e câncer no pulmão.A Organização Mundial da Saúde (OMS recomenda um valor orientador para água de beber de 10 mg As/L, enquanto que a

  7. Single-crystal 40Ar/39Ar incremental heating reveals bimodal sanidine ages in the Bishop Tuff

    Science.gov (United States)

    Andersen, N. L.; Jicha, B. R.; Singer, B. S.

    2015-12-01

    The 650 km3 Bishop Tuff (BT) is among the most studied volcanic deposits because it is an extensive marker bed deposited just after the Matuyama-Brunhes boundary. Reconstructions of the vast BT magma reservoir from which high-silica rhyolite erupted have long influenced thinking about how large silicic magma systems are assembled, crystallized, and mixed. Yet, the longevity of the high silica rhyolitic melt and exact timing of the eruption remain controversial due to recent conflicting 40Ar/39Ar sanidine vs. SIMS and ID-TIMS U-Pb zircon dates. We have undertaken 21 40Ar/39Ar incremental heating ages on 2 mm BT sanidine crystals from pumice in 3 widely separated outcrops of early-erupted fall and flow units. Plateau ages yield a bimodal distribution: a younger group has a mean of 766 ka and an older group gives a range between 772 and 782 ka. The younger population is concordant with the youngest ID-TIMS and SIMS U-Pb zircon ages recently published, as well as the astronomical age of BT in marine sediment. Of 21 crystals, 17 yield older, non-plateau, steps likely affected by excess Ar that would bias traditional 40Ar/39Ar total crystal fusion ages. The small spread in older sanidine ages, together with 25+ kyr of pre-eruptive zircon growth, suggest that the older sanidines are not partially outgassed xenocrysts. A bimodal 40Ar/39Ar age distribution implies that some fraction of rhyolitic melt cooled below the Ar closure temperature at least 10 ky prior to eruption. We propose that rapid "thawing" of a crystalline mush layer released older crystals into rhyolitic melt from which sanidine also nucleated and grew immediately prior to the eruption. High precision 40Ar/39Ar dating can thus provide essential information on thermo-physical processes at the millenial time scale that are critical to interpreting U-Pb zircon age distributions that are complicated by large uncertainties associated with zircon-melt U-Th systematics.

  8. Composição de ácidos graxos e teor de lipídios em cabeças de peixes: matrinxã (B. cephalus, Piraputanga (B. microlepis e Piracanjuba (B. orbignyanus, criados em diferentes ambientes Composition of fatty acid and lipid level in head fish species: matrinxã (B. cephalus, Piraputanga (B. microlepis e Piracanjuba (B. orbignyanus, cultivated in different environments

    Directory of Open Access Journals (Sweden)

    Altair B. Moreira

    2003-08-01

    Full Text Available Neste trabalho, foram determinados os lipídios totais e a composição de ácidos graxos da cabeça in natura de três espécies de peixes do gênero Brycon, matrinxã (B. cephalus, piraputanga (B. microlepis e piracanjuba (B. orbignyanus, criados em cativeiros (açudes e gaiolas e, nativos coletados nos rios Cuiabá-Manso (piraputanga e no rio Paraná (piracanjuba. Os teores de lipídios totais nas cabeças variaram de 14,26 a 22,00%. Com relação aos ácidos graxos, todas as espécies apresentaram como predominantes os ácidos oléico-C18:1ômega9 (40,21 a 44,41%, seguido dos ácidos palmítico-C16:0 (22,04 a 27,04%, esteárico-C18:0 (7,78 a 12,11% e linoléico-18:2ômega6 (5,27 a 14,68%. O percentual dos ácidos alfa-linolênico (18:3ômega3, araquidônico (20:4ômega6, eicosapentaenóico (20:5ômega3 e docosahexaenóico (22:6ômega3 foram inferiores a 2,52%. A somatória dos ácidos graxos polinsaturados (AGPI variou de 10,30 a 19,32%, e dos ácidos graxos saturados (AGS de 32,42 a 39,41%. A espécie piraputanga nativa apresentou maior proporção de ácidos ômega3 (3,67% e menor de ácidos ômega6 (6,02%.This study was developed for evaluating the total lipid and fatty acid composition of in natura heads of Brazilian fishes. Brycon cephalus (matrinxã, B. microlepis (piraputanga and B. orbignyanus (piracanjuba were cultivated in fish farms (ponds and cages and wild species were collected in Cuiabá-Manso river (B. microlepis and in Paraná river (B. orbignyanus. The total lipid content of the head varied widely among the species (14.26 to 22.00%. In relation of fatty acid composition, all species presented the oleic acid, C18:1omega9, as the predominant acid (40.21 to 44.41%, followed by the palmitic acid-C16:0 (22.04 to 27.04%, stearic acid-C18:0 (7.78 to 12.11% and linoleic acid-C18:2omega6 (5.27 to 14.68%. The levels of alpha-linolenic acid (C18:3omega3, arachidonic acid (C20:4omega6, eicosapentaenoic acid (C20:5omega3 and

  9. DNA damages induced by Ar F laser

    Energy Technology Data Exchange (ETDEWEB)

    Chapel, C.; Rose, S.; Chevrier, L.; Cordier, E.; Courant, D. [CEA Fontenay-aux-Roses, 92 (France). Dept. de Radiobiologie et de Radiopathologie

    2006-07-01

    The photo ablation process used in corneal refractive surgery by the Argon Fluoride (Ar F) laser emitting in ultraviolet C at 193 nm, exposes viable cells round the irradiated zone to sub ablative doses (< 400 joules.m -2). Despite that DNA absorption is higher at 193 nm than 254 nm, cytotoxicity of 193 nm laser radiation is lower than radiation emitted by 254 nm UV-C lamps. In situ, DNA could be protected of laser radiation by cellular components. Consequently, some authors consider that this radiation does not induce genotoxic effect whereas others suspect it to be mutagenic. These lasers are used for fifteen years but many questions remain concerning the long term effects on adjacent cells to irradiated area. The purpose of this study is to describe the effect of 193 nm laser radiation on DNA of stromal keratocytes which are responsible of the corneal structure. The 193 nm laser irradiation induces directly DNA breakage in keratocytes as it has been shown by the comet assay under alkaline conditions. Two hours post irradiation, damages caused by the highest exposure (150 J.m-2) are not repaired as it has been measured with the Olive Tail Moment (product of tail length and tail DNA content). They give partly evidence of induction of an apoptotic process in cells where DNA could be too damaged. In order to characterize specifically double strand breaks, a comparative analysis by immunofluorescence of the H2 Ax histone phosphorylation (H2 Ax) has been performed on irradiated keratocytes and unirradiated keratocytes. Results show a dose dependent increase of the number of H2 Ax positive cells. Consequences of unrepaired DNA lesions could be observed by the generation of micronuclei in cells. Results show again an increase of micronuclei in laser irradiated cells. Chromosomal aberrations have been pointed out by cytogenetic methods 30 mn after irradiation. These aberrations are dose dependent (from 10 to 150 J.m-2). The number of breakage decreases in the long run

  10. The beta decay asymmetry parameter of 35Ar

    International Nuclear Information System (INIS)

    Garnett, J.D.

    1987-11-01

    The beta decay asymmetry parameter for 35 Ar = 35 Cl + e + + nu/sub e/ has been remeasured in order to resolve a long standing puzzle. Previous asymmetry measurements, when combined with the comparative half-life, yield a value for the vector coupling constant, G/sub v/, that is in serious disagreement with the accepted value. We produced polarized 35 Ar by a (p,n) reaction on 35 Cl using the polarized proton beam provided by Lawrence Berkeley Laboratory's 88-Inch Cyclotron. The polarization of the 35 Ar was determined by measuring the asymmetry of the positrons produced in 35 Ar decay to the first excited state in 35 Cl (branching ratio = 1.3%) in coincidence with a 1219.4 keV gamma ray. Our result, A 0 = 0.49 +- 0.10, combined with the comparative half-life yields a value for G/sub v/ in agreement with the accepted value

  11. Irradiation effects of Ar cluster ion beams on Si substrates

    International Nuclear Information System (INIS)

    Ishii, Masahiro; Sugahara, Gaku; Takaoka, G.H.; Yamada, Isao

    1993-01-01

    Gas-cluster ion beams can be applied to new surface modification techniques such as surface cleaning, low damage sputtering and shallow junction formation. The effects of energetic Ar cluster impacts on solid surface were studied for cluster energies of 10-30keV. Irradiation effects were studied by RBS. For Si(111) substrates, irradiated with Ar ≥500 clusters to a dose of 1x10 15 ion/cm 2 at acceleration voltage 15kV, 2x10 14 atoms/cm 2 implanted Ar atoms were detected. In this case, the energy per cluster atom was smaller than 30eV; at this energy, no significant implantation occurs in the case of monomer ions. Ar cluster implantation into Si substrates occurred due to the high energy density irradiation. (author)

  12. RadNet Air Data From Little Rock, AR

    Science.gov (United States)

    This page presents radiation air monitoring and air filter analysis data for Little Rock, AR from EPA's RadNet system. RadNet is a nationwide network of monitoring stations that measure radiation in air, drinking water and precipitation.

  13. RadNet Air Data From Fort Smith, AR

    Science.gov (United States)

    This page presents radiation air monitoring and air filter analysis data for Fort Smith, AR from EPA's RadNet system. RadNet is a nationwide network of monitoring stations that measure radiation in air, drinking water and precipitation.

  14. Numerical simualtion of underground 37Ar transportation to the ground

    International Nuclear Information System (INIS)

    She Ruogu; Li Hua; Liu Cheng'an; Wu Jun

    2008-01-01

    Monitoring radioactive gas 37 Ar is an important technique for the On-Site Inspection(OSI) of the Comprehensive Nuclear Test Ban Treaty (CTBT) verification regime. In order to establish a theoretical model that can be used to calculate the appearing time and radioactivity of 37 Ar which transports to the ground after a nuclear explosion, the rock media in the test area is assumed to be a homogeneous porous media, without consideration of gas absorption by and release from the rock media. The seepage model in the porous media is used to calculate 37 Ar transportation. Computational results give the time 37 Ar leaks to the ground and the variation of its radioactivity with time. And we can analyze and consider the computational results when we have developed OSI noble gas monitoring systems and evaluated their effectiveness. (authors)

  15. Potential hydroxyl ultraviolet laser. [Ar-H/sub 2/O

    Energy Technology Data Exchange (ETDEWEB)

    Chen, C H; Payne, M G

    1976-09-01

    A strong emission band extending from 3060 to 3120 A was observed following proton beam excitation of an Ar--H/sub 2/O mixture. This emission band was assigned to the transition of OH(A/sup 2/Sigma/sup +/)/sub nu=o/ ..-->.. OH(X/sup 2/Pi)/sub nu=o/. At high argon partial pressure (> 200 torr), the precursor of this emission band is believed to be the argon excimer Ar/sup *//sub 2/(1/sub u/). The fluorescence efficiency of Ar--H/sub 2/O is estimated to be a factor of 4 times that of Ar--N/sub 2/. Development of a highly efficient, tunable uv laser by e-beam pumping is promising.

  16. Ar Rahman-Based Dysmenorrhea Gymnastic to Reduce Pain

    OpenAIRE

    Sumaryani, Sri; Puspita Sari, Praditiana Indah

    2015-01-01

    Introduction: More than 50% dysmenorrhea are caused by excessive amounts of prostaglandin hormone during menstruation.  The combination of dysmenorrhea gymnastics and Qur'an Surah Ar-Rahman relaxation techniques is a new innovation in non-pharmacological therapy to overcome dysmenorrhoea. The purpose of this study was to determine the level of pain differences on respondents who were given dysmenorrhea gymnastics treatment, Al Quran Surah Ar-Rahman recitation, and dysmenorrhea gymnastics comb...

  17. Low energy total cross section of 36Ar

    International Nuclear Information System (INIS)

    Mughabghab, S.F.; Magurno, B.A.

    1975-01-01

    To compare the predictions of the valence model with measured partial radiative widths of 36 Ar an accurate knowledge of the bound-level parameters is required. This is achieved by carrying out a Breit-Wigner parameter fit to the total cross section of 36 Ar measured by Chrien et al and renormalized to the recommended values of the thermal capture and scattering cross sections. (1 figure, 1 table) (U.S.)

  18. Strategic Repositioning for Convection Business Case Study: AR Vendor

    OpenAIRE

    Anindita, Pratisara Satwika; Toha, Mohamad

    2013-01-01

    The study aims to determine suitable position and strategy in order to reach superiority in convection business based on the company strengths and weaknesses. A study conducted in late 2012 at AR Vendor, a home-based convection company which focus on the t-shirt screen printing service. In response to the issue of the below average profit margin, the company has to rethink their position and strategy in handling the convection business environment. While AR Vendor business may growth in accor...

  19. An analysis of the 1977 AD/AR TARSLL.

    OpenAIRE

    Hargrove, James Wiley Jr.

    1980-01-01

    Approved for public release; distribution is unlimited The industrial mission of Destroyer Tenders (AD) and Repair Ships (AR) is to provide intermediate level maintenance and repair for supported ships. The Tender and Repair Ship Load List for these ships (AD/AR TARSLL) designates the range (number) and depth (quantity) of repair parts to be carried to support this industrial mission. This thesis details the logical reasoning and mathematical theory used to develop the...

  20. Combined U-Th/He and 40Ar/39Ar geochronology of post-shield lavas from the Mauna Kea and Kohala volcanoes, Hawaii

    Energy Technology Data Exchange (ETDEWEB)

    Aciego, S.M.; Jourdan, F.; DePaolo, D.J.; Kennedy, B.M.; Renne, P.R.; Sims, K.W.W.

    2009-10-01

    Late Quaternary, post-shield lavas from the Mauna Kea and Kohala volcanoes on the Big Island of Hawaii have been dated using the {sup 40}Ar/{sup 39}Ar and U-Th/He methods. The objective of the study is to compare the recently demonstrated U-Th/He age method, which uses basaltic olivine phenocrysts, with {sup 40}Ar/{sup 39}Ar ages measured on groundmass from the same samples. As a corollary, the age data also increase the precision of the chronology of volcanism on the Big Island. For the U-Th/He ages, U, Th and He concentrations and isotopes were measured to account for U-series disequilibrium and initial He. Single analyses U-Th/He ages for Hamakua lavas from Mauna Kea are 87 {+-} 40 ka to 119 {+-} 23 ka (2{sigma} uncertainties), which are in general equal to or younger than {sup 40}Ar/{sup 39}Ar ages. Basalt from the Polulu sequence on Kohala gives a U-Th/He age of 354 {+-} 54 ka and a {sup 40}Ar/{sup 39}Ar age of 450 {+-} 40 ka. All of the U-Th/He ages, and all but one spurious {sup 40}Ar/{sup 39}Ar ages conform to the previously proposed stratigraphy and published {sup 14}C and K-Ar ages. The ages also compare favorably to U-Th whole rock-olivine ages calculated from {sup 238}U - {sup 230}Th disequilibria. The U-Th/He and {sup 40}Ar/{sup 39}Ar results agree best where there is a relatively large amount of radiogenic {sup 40}Ar (>10%), and where the {sup 40}Ar/{sup 36}Ar intercept calculated from the Ar isochron diagram is close to the atmospheric value. In two cases, it is not clear why U-Th/He and {sup 40}Ar/{sup 39}Ar ages do not agree within uncertainty. U-Th/He and {sup 40}Ar/{sup 39}Ar results diverge the most on a low-K transitional tholeiitic basalt with abundant olivine. For the most alkalic basalts with negligible olivine phenocrysts, U-Th/He ages were unattainable while {sup 40}Ar/{sup 39}Ar results provide good precision even on ages as low as 19 {+-} 4 ka. Hence, the strengths and weaknesses of the U-Th/He and {sup 40}Ar/{sup 39}Ar methods are

  1. Use of an A.E.I. MS 10 mass spectrometer for 40Ar-39Ar dating

    International Nuclear Information System (INIS)

    Baksi, A.K.

    1979-01-01

    The use of an AEI mass spectrometer for 40 Ar/ 39 Ar dating could, in principle, be problematical due to its limited mass resolution and because of non-linear mass discrimination under certain operating conditions. These possible drawbacks have been investigated and are found to be easy to overcome. Tailing corrections are relatively small and can be applied precisely for 40 Ar/ 39 Ar ratios <= 300. By operating the instrument with a trap current of 50 μA and an ion repeller voltage of +1.0 w.r.t. cage, problems due to non-linear mass discrimination are eliminated. Using the incremental heating technique and total fusion studies on very small subsamples (10-25 mg.), the homogeneity of some well-known inter-laboratory standards has been investigated; the relative merits of these standards are discussed. (K.B.)

  2. Heterogeneous 40Ar/39Ar laser probe apparent ages in low-grade mylonitic rocks: Constraining a meaningful geological age

    International Nuclear Information System (INIS)

    Arancibia, G

    2001-01-01

    Obtaining meaningful geological ages from mylonitic rocks has been a major problem for structural geologist, because apparent ages have usually no geologic significance. Over the last years, in situ high spatial resolutions 40 Ar/ 39 Ar studies (e.g. Ruffet et al., 1991; Reddy et al., 1996; Pickles et al., 1997), permit obtain apparent ages of mineral and link them directly with textural, microstructural and chemical patterns that can previously be obtained by optical and scanning electron (SEM) microscopes and electron microprobe. In this work, heterogeneous 40 Ar/ 39 Ar laser probe ages from low-grade volcanic mylonites show complex argon distributions patterns. Inverse isochron analysis suggests that most obtained apparent ages contain argon excess and only younger ages have a meaningful geologically interpretation (au)

  3. Characteristics and 40Ar/39Ar geochronology of the Erdenet Cu-Mo deposit, Mongolia

    Science.gov (United States)

    Kavalieris, Imants; Khashgerel, Bat-Erdene; Morgan, Leah; Undrakhtamir, Alexander; Borohul, Adiya

    2017-01-01

    50 to 200 m from the granodiorite porphyry contact, although D veins (and chalcopyrite) extend outward to the propylitic zone.The Erdenet porphyry system, was overprinted by advanced argillic alteration, which outcrops 2 km northwest of the pit, and forms a lithocap that extends over 10 × 2.5 km. It is characterized by residual quartz, andalusite, Na-Ca and K-alunite, diaspore, pyrophyllite, zunyite, topaz, dickite, and kaolinite. The upper part of the porphyry Cu-Mo deposit (removed by mining), comprised a bornite-chalcocite enriched zone up to 300 m thick with an average grade of 0.7 wt % Cu and up to 5 wt % Cu locally. Based on hypogene bornite-chalcocite mineral textures and high-sulfidation state mineralogy, the enriched zone is inferred to be of hypogene origin, but modified by supergene processes. Consequently, it may be related to formation of the lithocap.Previous Re-Os dates of 240.4 and 240.7 ± 0.8 Ma for molybdenite in quartz veins are comparable to new 40Ar/39Ar dates of 239.7 ± 1.6 and 240 ± 2 Ma for muscovite that envelops D veins. One 40Ar/39Ar date on K-alunite from the lithocap of 223.5 ± 1.9 Ma suggests that it may be about 16 m.y. younger than Erdenet, but this result needs to be verified by further dating.

  4. 40Ar/39Ar Dating of the Brunhes-Matuyama Geomagnetic Field Reversal.

    Science.gov (United States)

    Baksi, A K; Hsu, V; McWilliams, M O; Farrar, E

    1992-04-17

    Magnetostratigraphic studies are widely used in conjunction with the geomagnetic polarity time scale (GPTS) to date events in the range 0 to 5 million years ago. A critical tie point on the GPTS is the potassium-argon age of the most recent (Brunhes-Matuyama) geomagnetic field reversal. Astronomical values for the forcing frequencies observed in the oxygen isotope record in Ocean Drilling Project site 677 suggest that the age of this last reversal is 780 ka (thousand years ago), whereas the potassium-argon-based estimate is 730 ka. Results from 4039; Ar incremental heating studies on a series of lavas from Maui that straddle the Brunhes-Matuyama reversal give an age of 783 + 11 ka, in agreement with the astronomically derived value. The astronomically based technique appears to be a viable tool for dating young sedimentary sequences.

  5. Anomalous evolution of Ar metastable density with electron density in high density Ar discharge

    International Nuclear Information System (INIS)

    Park, Min; Chang, Hong-Young; You, Shin-Jae; Kim, Jung-Hyung; Shin, Yong-Hyeon

    2011-01-01

    Recently, an anomalous evolution of argon metastable density with plasma discharge power (electron density) was reported [A. M. Daltrini, S. A. Moshkalev, T. J. Morgan, R. B. Piejak, and W. G. Graham, Appl. Phys. Lett. 92, 061504 (2008)]. Although the importance of the metastable atom and its density has been reported in a lot of literature, however, a basic physics behind the anomalous evolution of metastable density has not been clearly understood yet. In this study, we investigated a simple global model to elucidate the underlying physics of the anomalous evolution of argon metastable density with the electron density. On the basis of the proposed simple model, we reproduced the anomalous evolution of the metastable density and disclosed the detailed physics for the anomalous result. Drastic changes of dominant mechanisms for the population and depopulation processes of Ar metastable atoms with electron density, which take place even in relatively low electron density regime, is the clue to understand the result.

  6. Biometria e alterações histopatológicas em testículos de catetos (Tayassu tajacu criados em cativeiro no semi-árido nordestino, Brasil

    Directory of Open Access Journals (Sweden)

    Kilder Dantas Filgueira

    2005-02-01

    Full Text Available O presente trabalho foi desenvolvido visando contribuir com informações a respeito de aspectos biométricos e patológicos em testículos de catetos (Tayassu tajacu. Utilizaram-se doze animais, com idades superior a dez anos, provenientes do Centro de Multiplicação de Animais Silvestres CEMAS/ESAM. Após a coleta, os testículos foram submetidos a biometria e em seguida fixados em solução de Bouin. Posteriormente, conservou-se a amostra em álcool a 70% e submeteu-se ao processamento histológico de rotina. A leitura das lâminas foi realizada em microscópio óptico e os resultados obtidos analisados estatisticamente através dos testes "t" e "Z". Os valores médios de comprimento, circunferência e peso, entre o testículo direito e esquerdo, não revelam diferença estatística, ao se aplicar o teste "t". Porém, o mesmo teste demonstrou correlação com significância a 1% de probabilidade entre a gônada direita e esquerda, ao se comparar cada variável biométrica. Dos 12 animais utilizados, oito (67% apresentaram alterações testiculares, as quais corresponderam a degeneração (63%, rarefação do epitélio (25% e orquite (12%. Através do teste "Z" houve significância, a 2,5%, ao se compararem às freqüências entre degeneração e rarefação, assim como degeneração e orquite. Verificou-se que, à medida que uma das variáveis biométricas de um testículo apresenta modificação, há uma correspondência com o órgão contralateral. A patologia mais frequente foi à degeneração testicular, a qual demonstrou correlação com as demais alterações.

  7. Avaliação do desenvolvimento larval de Anopheles darlingi criado em laboratório sob diferentes dietas Evaluation of the larval development of Anopheles darlingi (Diptera - Culicidae raised in the laboratory on different diets

    Directory of Open Access Journals (Sweden)

    Eduardo Sterlino Bergo

    1990-04-01

    Full Text Available São testadas três dietas para larvas de A. darlingi, buscando-se os seguintes parâmetros indicativos de desenvolvimento nesta fase: tempo de evolução total e de cada estádio, sobrevivência ao estádio, diária e total. A metodologia utilizada na determinação desses parâmetros constitui-se da combinação de dois métodos de análise da estatística vital, adaptados ao estudo de populações mantidas em laboratório. Os tempos de evolução total e de cada estádio foram determinados gráficamente a partir das curvas de tendência dos estádios medianos da colônia, em inspeções sucessivas. Os valores de sobrevivência diária, ao estádio e total foram calculados a partir de tábuas de sobrevivência. Os resultados permitiram eleger a dieta composta de uma parte de farinha de peixe para duas partes de farinha de pão e duas partes de germe de trigo como a mais adequada ao desenvolvimento larval, com duração de 12,9 dias entre o primerio estádio e a emersão do adulto e sobrevivência total de 95%.Three diets for A. darlingi larvae were tested in order to arrive at the following parameters indicative of development in this phase: length of time, both for overall as for each stage of evolution and daily and total stage-survival. A methodology which combined two vital statistical methods of analysis, adjusted to the study of populations under laboratory conditions, was used for determining these parameters. The length of time for overall and for each stage of, evolution were graphically assessed on the basis of trend curves of colony median stages, in sequential surveys. Values for the total and the daily stage-survival were stimated from survival tables. Results permitted the selection of the most adequate diet for the larval development as that composed of one part of fish flour to two parts of bread flour and two parts of a heat germ, giving an average length of 12.9 days between the first larval stage and the emergent adult

  8. Precambrian evolution of the Salalah Crystalline Basement from structural analysis and 40Ar/39Ar geochronology

    Science.gov (United States)

    Al-Doukhi, Hanadi Abulateef

    The Salalah Crystalline Basement (SCB) is the largest Precambrian exposure in Oman located on the southern margin of the Arabian Plate at the Arabian Sea shore. This work used remote sensing, detailed structural analysis and the analysis of ten samples using 40Ar/39Ar age dating to establish the Precambrian evolution of the SCB by focusing on its central and southwestern parts. This work found that the SCB evolved through four deformational events that shaped its final architecture: (1) Folding and thrusting event that resulted in the emplacement of the Sadh complex atop the Juffa complex. This event resulted in the formation of possibly N-verging nappe structure; (2) Regional folding event around SE- and SW-plunging axes that deformed the regional fabric developed during the N-verging nappe structure and produced map-scale SE- and SW-plunging antiforms shaping the complexes into a semi-dome structure; (3) Strike-slip shearing event that produced a conjugate set of NE-trending sinistral and NW-trending dextral strike-slip shear zones; and (4) Localized SE-directed gravitational collapse manifested by top-to-the-southeast kinematic indicators. Deformation within the SCB might have ceased by 752.2+/-2.7 Ma as indicated by an age given by an undeformed granite. The thermochron of samples collected throughout the SCB complexes shows a single cooling event that occurred between about 800 and 760 Ma. This cooling event could be accomplished by crustal exhumation resulting in regional collapse following the prolonged period of the contractional deformation of the SCB. This makes the SCB a possible metamorphic core complex.

  9. Exhumation history of the NW Indian Himalaya revealed by fission track and 40Ar/39Ar ages

    Science.gov (United States)

    Schlup, Micha; Steck, Albrecht; Carter, Andrew; Cosca, Michael; Epard, Jean-Luc; Hunziker, Johannes

    2011-01-01

    New fission track and Ar/Ar geochronological data provide time constraints on the exhumation history of the Himalayan nappes in the Mandi (Beas valley) — Tso Morari transect of the NW Indian Himalaya. Results from this and previous studies suggest that the SW-directed North Himalayan nappes were emplaced by detachment from the underthrusted upper Indian crust by 55 Ma and metamorphosed by ca. 48–40 Ma. The nappe stack was subsequently exhumed to shallow upper crustal depths (

  10. Bone blood flow measured by 41Ar clearance formed by 44Ca(n,α)41Ar

    International Nuclear Information System (INIS)

    Rosenthal, M.S.; DeLuca, P.M. Jr.; Pearson, D.W.; Nickles, R.J.

    1983-01-01

    A technique to measure regional inert gas washout in bone, in vivo, by measuring 41 Ar clearance formed by fast-neutron activation of 44 Ca has been developed. Following fast-neutron irradiation of whole rats, the perfusion-limited clearance of 41 Ar was measured for both dead and living rats. The clearance rate for the live rats indicate that the bone perfusion is in the range of 3 to 20 ml/100 Argon distribution volume

  11. Relação entre tamanho e estrutura da rede de apoio e o tempo individual dedicado à atenção ao idoso na cidade de São Paulo, 2000

    Directory of Open Access Journals (Sweden)

    Cristiane Silva Corrêa

    2016-04-01

    Full Text Available O presente artigo investiga como o tamanho e a estrutura da rede social do idoso influenciam a atenção que lhe é dedicada por cada indivíduo de sua rede. Para tanto, foram criados dois índices de atenção ao idoso, a partir de dados da Pesquisa Saúde, Bem-Estar e Envelhecimento na América Latina e Caribe (Sabe para a cidade de São Paulo, em 2000, e utilizados modelos de regressão logística ordenados. Considerou-se que a atenção dedicada ao idoso requer tempo e comunicação e que sua rede de apoio engloba tanto os corresidentes quanto seus filhos e irmãos não corresidentes e demais pessoas não corresidentes que possuem alguma relação com o idoso. Utilizando modelos de regressão logística ordenados, encontraram-se associações entre a atenção que cada indivíduo dedica ao idoso e as variáveis que designam a estrutura e o tamanho familiar. Constatou-se que a atenção e o tempo dedicado ao idoso, além de relacionados às características das pessoas envolvidas, a estrutura e o tamanho da rede, estão também associados à estrutura, tamanho e características das redes sociais dessas pessoas. Por exemplo, uma rede maior implica que o idoso recebe menos atenção de cada membro dela. A pessoa que casou apenas uma vez tem maior chance de receber níveis mais elevados de atenção. Uma maior proporção de filhas na prole implica que estas assumem a maior parte da responsabilidade, enquanto outros membros da rede são menos presentes.

  12. The potential of AR-V7 as a therapeutic target.

    Science.gov (United States)

    Uo, Takuma; Plymate, Stephen R; Sprenger, Cynthia C

    2018-03-01

    The androgen receptor variant AR-V7 is gaining attention as a potential predictive marker for as well as one of the resistance mechanisms to the most current anti-androgen receptor (AR) therapies in castration-resistant prostate cancer (CRPC). Accordingly, development of next-generation drugs that directly or indirectly target AR-V7 signaling is urgently needed. Areas covered: We review proposed mechanisms of drug resistance in relation to AR-V7 status, the mechanisms of generation of AR-V7, and its transcriptome, cistrome, and interactome. Pharmacological agents that interfere with these processes are being developed to counteract pan AR and AR-V7-specific signaling. Also, we address the current status of the preclinical and clinical studies targeting AR-V7 signaling. Expert opinion: AR-V7 is considered a true therapeutic target, however, it remains to be determined if AR-V7 is a principal driver or merely a bystander requiring heterodimerization with co-expressed full-length AR or other variants to drive CRPC progression. While untangling AR-V7 biology, multiple strategies are being developed to counteract drug resistance, including selective blockade of AR-V7 signaling as well as inhibition of pan-AR signaling. Ideally anti-AR therapies will be combined with agents preventing activation and enrichment of AR negative tumor cells that are otherwise depressed by AR activity axis.

  13. The mass of sup 3 sup 2 Ar and sup 3 sup 3 Ar for fundamental tests

    CERN Document Server

    Blaum, K; Beck, D; Bollen, G; Herfurth, F; Kellerbauer, A G; Kluge, H J; Sauvan, E; Schwarz, S

    2003-01-01

    Masses of the short-lived radionuclides sup 3 sup 2 Ar (T sub 1 sub / sub 2 = 98 ms) sup 3 sup 3 Ar (T sub 1 sub / sub 2 = 173 ms) have been determined with the Penning trap mass spectrometer ISOLTRAP. Relative uncertainties of 6.0 x 10 sup - sup 8 (delta m = 1.8 keV) and 1.4 x 10 sup - sup 8 (delta m = 0.44 keV), respectively, have been achieved. At present, these new mass data serve as the most stringent test of the quadratic form of the isobaricmultiplet mass equation IMME. Furthermore, the improved accuracy for the mass of sup 3 sup 2 Ar yields a better constraint on scalar contributions to the weak interaction. New mass values have also been measured for sup 4 sup 4 Ar and sup 4 sup 5 Ar, and a 20 sigma deviation for sup 4 sup 4 Ar from the literature value was found and interpreted.

  14. Energy dependence of the reaction rate constants of Ar+, Ar++ and N2+ ions with Cl2

    International Nuclear Information System (INIS)

    Lukac, P.; Holubcik, L.; Morva, I.; Lindinger, W.

    2002-01-01

    Dry etching processes using low temperature plasmas in Cl 2 and in Cl 2 -noble gas or nitrogen mixtures are common in the manufacture of semiconductor devices, but their chemical mechanisms are often poorly understood. Results are given for the reaction rate constant measurements of Ar + , Ar ++ , N 2 + ions with chlorine as a function of mean relative kinetic energy. The experiments were performed by using the innsbruck flow drift tube (IFDT) apparatus. Measurements were done at various E/N values, where E is the electric field strength and N the buffer gas density in the drift section. The mean relative kinetic energy KE CM between the ions and the neutral chlorine Cl 2 was calculated using the Wanniers formula. It was found that The N 2 + , Ar + and Ar ++ positive ions react with chlorine Cl 2 very fast and the corresponding reaction rate coefficients depend on the mean relative kinetic energy. For the reaction of Ar - with Cl 2 , its reaction coefficient depends also on the buffer gas. It can imply the enhancement of Cl 2 + ions during etching of Si in the Ar/Cl 2 mixtures. (nevyjel)

  15. Accurate and precise 40Ar/39Ar dating by high-resolution, multi-collection, mass spectrometry

    DEFF Research Database (Denmark)

    Storey, Michael; Rivera, Tiffany; Flude, Stephanie

    New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating. Here we report analytical protocols and age cross-calibration studies using a NU-Instruments......New generation, high resolution, multi-collector noble gas mass spectrometers equipped with ion-counting electron multipliers provide opportunities for improved accuracy and precision in 40Ar/39Ar dating. Here we report analytical protocols and age cross-calibration studies using a NU......-Instruments multi-collector Noblesse noble gas mass spectrometer configured with a faraday detector and three ion-counting electron multipliers. The instrument has the capability to measure several noble gas isotopes simultaneously and to change measurement configurations instantaneously by the use of QUAD lenses...... (zoom optics). The Noblesse offer several advantages over previous generation noble gas mass spectrometers and is particularly suited for single crystal 40Ar/39Ar dating because of: (i) improved source sensitivity (ii) ion-counting electron multipliers, which have much lower signal to noise ratios than...

  16. Spectroscopic and electric dipole properties of Sr+Ar and SrAr systems including high excited states

    Science.gov (United States)

    Hamdi, Rafika; Abdessalem, Kawther; Dardouri, Riadh; Al-Ghamdi, Attieh A.; Oujia, Brahim; Gadéa, Florent Xavier

    2018-01-01

    The spectroscopic properties of the fundamental and several excited states of Sr+Ar and SrAr, Van der Waals systems are investigated by employing an ab initio method in a pseudo-potential approach. The potential energy curves and the spectroscopic parameters are displayed for the 1-10 2Σ+, 1-6 2Π and 1-3 2Δ electronic states of the Sr+Ar molecule and for the 1-6 1Σ+, 1-4 3Σ+, 1-3 1,3Π and 1-3 1,3Δ states of the neutral molecule SrAr. In addition, from these curves, the vibrational levels and their energy spacing are deduced for Σ+, Π and Δ symmetries. The spectra of the permanent and transition dipole moments are studied for the 1,3Σ+ states of SrAr, which are considered to be two-electron systems and 2Σ+ states of the single electron Sr+Ar ion. The spectroscopic parameters obtained for each molecular system are compared with previous theoretical and experimental works. A significant correlation revealed the accuracy of our results.

  17. Problems in the K-Ar dating of Quaternary volcanic rocks younger than 1 Ma

    International Nuclear Information System (INIS)

    Takaoka, Nobuo

    1989-01-01

    The assumption that the 40 Ar/ 36 Ar ratio of Ar trapped in volcanic rocks at eruption is atmospheric often gives a large systematic error in the K-Ar dating of Quaternary volcanic rocks younger than 1 Ma. There are two possible sources of error, the existence of excess Ar and mass-fractionated, initial Ar. The major source of excess Ar is supposed to be magma. The 40 Ar/ 36 Ar ratio for magmatic Ar in the North-East Japan arc is tentatively estimated to be 340±10 from measurements of Ar in large phenocrysts separated from Quaternary volcanic rocks. Separation of phenocrysts is the most effective to decrease the systematic error caused by excess Ar. The mass-fractionation of initial Ar should give the 38 Ar/ 36 Ar ratio which was changed from the atmospheric ratio. This can be checked by determining the 38 Ar/ 36 Ar ratio in samples. Since the systematic error caused by the mass-fractionated, initial Ar increases greatly with the increasing atmospheric Ar correction, it is important to correct the result for the mass-fractionation. Correction formulae are given. The error sources other than those mentioned above are uncertainty in the blank correction and instabilities in the sensitivity of spectrometer and the Ar isotopic ratio measurement. In order to increase accuracy of the K-Ar age obtained, to check the systematic errors by measuring samples together with standard samples is of great importance in the K-Ar dating of very young volcanic rocks. (author)

  18. Prevalência de anticorpos antivírus da arterite dos eqüinos em cavalos criados no Estado de São Paulo Prevalence of equine arteritis virus specific antibodies in horses of São Paulo State, Brazil

    OpenAIRE

    M.C.C.S.H. Lara; W.R. Fernandes; P.J. Timoney; E.H. Birgel

    2002-01-01

    Utilizou-se a prova de soroneutralização em microplacas para detecção de anticorpos antivírus da arterite dos eqüinos em 659 amostras de soro sangüíneo de animais criados no Estado de São Paulo. A prevalência de anticorpos na população estudada foi igual a 18,2%. A raça Mangalarga foi a que apresentou maior taxa de prevalência, 33,3%. Animais na faixa etária de 6 a 24 meses de idade apresentaram a maior taxa de prevalência, 30,4%, e as fêmeas apresentaram prevalência de 22, 9%, mais alta do q...

  19. The 40Ar/39Ar and U/Pb dating of young rhyolites in the Kos-Nisyros volcanic complex, Eastern Aegean Arc, Greece: Age discordance due to excess 40Ar in biotite

    Science.gov (United States)

    Bachmann, O.; Schoene, B.; Schnyder, C.; Spikings, R.

    2010-08-01

    High-precision dating of Quaternary silicic magmas in the active Kos-Nisyros volcanic center (Aegean Arc, Greece) by both 40Ar/39Ar on biotite and U/Pb on zircon reveals a complex geochronological story. U/Pb ID-TIMS multi and single-grain zircon analyses from 3 different units (Agios Mammas and Zini domes, Kefalos Serie pyroclasts) range in age from 0.3 to 0.5 to 10-20 Ma. The youngest dates provide the maximum eruption age, while the oldest zircons indicate inheritance from local continental crust (Miocene and older). Step-heating 40Ar/39Ar experiments on 1-3 crystals of fresh biotite yielded highly disturbed Ar-release patterns with plateau ages typically older than most U/Pb ages. These old plateau ages are probably not a consequence of inheritance from xenocrystic biotites because Ar diffuses extremely fast at magmatic temperatures and ratios are reset within a few days. On the basis of (1) elevated and/or imprecise 40Ar/36Ar ratios, (2) shapes of the Ar release spectra, and (3) a high mantle 3He flux in the Kos-Nisyros area, we suggest that biotite crystals retained some mantle 40Ar that led to the observed, anomalously old ages. In contrast, sanidine crystals from the only sanidine-bearing unit in the Kos-Nisyros volcanic center (the caldera-forming Kos Plateau Tuff) do not appear to store any excess 40Ar relative to atmospheric composition. The eastern edge of the Aegean Arc is tectonically complex, undergoing rapid extension and located close to a major structural boundary. In such regions, which are characterized by high fluxes of mantle volatiles, 40Ar/39Ar geochronology on biotite can lead to erroneous results due to the presence of excess 40Ar and should be checked either against 40Ar/39Ar sanidine or U/Pb zircon ages.

  20. Acoustic Resonance Spectroscopy (ARS) Munition Classification System enhancements. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Vela, O.A.; Huggard, J.C.

    1997-09-18

    Acoustic Resonance Spectroscopy (ARS) is a non-destructive evaluation technology developed at the Los Alamos National Laboratory (LANL). This technology has resulted in three generations of instrumentation, funded by the Defense Special Weapons Agency (DSWA), specifically designed for field identification of chemical weapon (CW) munitions. Each generation of ARS instrumentation was developed with a specific user in mind. The ARS1OO was built for use by the U.N. Inspection Teams going into Iraq immediately after the Persian Gulf War. The ARS200 was built for use in the US-Russia Bilateral Chemical Weapons Treaty (the primary users for this system are the US Onsite Inspection Agency (OSIA) and their Russian counterparts). The ARS300 was built with the requirements of the Organization for the Prohibition of Chemical Weapons (OPCW) in mind. Each successive system is an improved version of the previous system based on learning the weaknesses of each and, coincidentally, on the fact that more time was available to do a requirements analysis and the necessary engineering development. The ARS300 is at a level of development that warrants transferring the technology to a commercial vendor. Since LANL will supply the computer software to the selected vendor, it is possible for LANL to continue to improve the decision algorithms, add features where necessary, and adjust the user interface before the final transfer occurs. This paper describes the current system, ARS system enhancements, and software enhancements. Appendices contain the Operations Manual (software Version 3.01), and two earlier reports on enhancements.

  1. Métodos clássicos de protecção de sistemas elevatórios contra o golpe de aríete

    OpenAIRE

    Mendes, Luís Filipe Martins

    2011-01-01

    Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, perfil Engenharia Sanitária A ocorrência de regimes transitórios, em particular do golpe de aríete e subsequente propagação de ondas de pressão, em sistemas elevatórios de água e águas residuais, é um acontecimento normal e frequente, que acompanha qualquer alteração nas suas condições normais de funcionamento. As circunstâncias mais violentas, associadas ao golpe de aríete, normalmente, resultam do corte de energia ...

  2. 40Ar/ 39Ar, K-Ar and 230Th- 238U dating of the Laschamp excursion: A radioisotopic tie-point for ice core and climate chronologies

    Science.gov (United States)

    Singer, Brad S.; Guillou, Hervé; Jicha, Brian R.; Laj, Carlo; Kissel, Catherine; Beard, Brian L.; Johnson, Clark M.

    2009-08-01

    A brief period of enhanced 10Be flux that straddles the interstadial warm period known as Dansgaard-Oeschger event 10 in Greenland and its counterpart in Antarctica, the Antarctic Isotope Maximum 10 is but one consequence of the weakening of Earth's magnetic field associated with the Laschamp excursion. This 10Be peak measured in the GRIP ice core is dated at 41,250 y b2k (= before year 2000 AD) in the most recent GICC05 age model obtained from the NorthGRIP core via multi-parameter counting of annual layers. Uncertainty in the age of the 10Be peak is, however, no better than ± 1630 y at the 95% confidence level, reflecting accumulated error in identifying annual layers. The age of the Laschamp excursion [Guillou, H., Singer, B.S., Laj, C., Kissel, C., Scaillet, S., Jicha, B., 2004. On the age of the Laschamp geomagnetic excursion. Earth Planet. Sci. Lett. 227, 331-343.] is revised on the basis of new 40Ar/ 39Ar, unspiked K-Ar and 238U- 230Th data from three lava flows in the Massif Central, France, together with the 40Ar/ 39Ar age of a transitionally magnetized lava flow at Auckland, New Zealand. Combined, these data yield an age of 40,700 ± 950 y b2k, where the uncertainty includes both analytical and systematic ( 40K and 230Th decay constant) errors. Taking the radioisotopic age as a calibration tie point suggests that the layer-counting chronologies for the NorthGRIP and GISP2 ice cores are more accurate and precise than previously thought at depths corresponding to the Laschamp excursion.

  3. Assistência de enfermagem ao escolar: uma introdução ao problema

    Directory of Open Access Journals (Sweden)

    Maria das Graças C. Ferriani

    1983-12-01

    Full Text Available Neste estudo são apresentados alguns aspectos da assistência de saúde ao escolar através dos tempos. Atualmente, profissionais de saúde estão voltados para a saúde escolar e todos tentam de alguma forma desempenhar o seu papel contribuindo para transformar os escolares em cidadãos úteis e capazes. A enfermagem de há muito tempo despertou seu interesse para melhorar as condições de vida do escolar. Na literatura consultada verificamos que a enfermeira, em alguns países da Europa e Estados Unidos, faz parte integrante do Sistema Escolar, e esta atividade é oficializada pelo governo. No Brasil, embora exista uma lei que coloca a enfermeira no sistema escolar, não encontramos nenhuma atividade de enfermagem oficializada e próprias das Secretarias de Educação dos diversos setores da União. O objet'vo deste ensaio é mostrar a importância da assistência de enfermagem dentro do sistema escolar.

  4. Marketing de Relacionamento: Agregando Valor ao Negócio com Big Data

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Borges Coutrim dos Reis

    2016-12-01

    Full Text Available Nos últimos anos, as constantes inovações tecnológicas, o aumento exponencial do volume de dados, junto às evoluções nas tendências de consumo, geraram um cenário global de grandes desafios para as organizações. O uso de tecnologias de Big Data, para análise do volume crescente de dados, disponíveis no mundo virtual globalizado, oferece uma nova visão sobre o mercado e pode contribuir com o futuro das organizações, por meio da disponibilização de informações de qualidade que apoiarão fortemente a tomada de decisão. Nesse cenário de alta competitividade, considerar o contexto de análises de dados, com o uso de tecnologias de Big Data, pode ampliar a visão das empresas para as tendências do mercado, favorecendo a identificação de estratégias melhor direcionadas aos perfis de comportamentos e preferências de consumo. O objetivo da pesquisa é investigar como o uso das tecnologias de Big Data pode ampliar a capacidade do marketing de relacionamento das organizações, agregando valor ao negócio. Os resultados demonstram que as organizações que fazem uso das tecnologias de Big Data, conseguem melhor definir suas estratégias de marketing de relacionamento com os clientes, obtendo como resultados relacionamentos mais duradouros com o mercado e seus clientes e retornos favoráveis aos seus negócios. Em um futuro próximo, a utilização de Big Data, para ampliação das estratégias de marketing de relacionamento, serão regras de sobrevivência para as organizações. O diferencial estará na forma como o gestor interpretará as informações disponíveis e agirá para alcançar os resultados almejados.

  5. Acesso ao cuidado à saúde da criança em serviços de atenção primária

    Directory of Open Access Journals (Sweden)

    Rosane Meire Munhak da Silva

    2014-10-01

    Full Text Available Realizou-se uma pesquisa de abordagem qualitativa com base no referencial metodológico da hermenêutica dialética, com o objetivo de identificar o atributo acesso da atenção primária para a resolução dos problemas de saúde de crianças menores de um ano a partir dos relatos de pais e cuidadores. Envolveram-se 16 cuidadores de crianças atendidas em unidades de pronto atendimento de Cascavel-PR, em 2010. Foram reconhecidas quatro categorias temáticas: Aconselhamento familiar ao buscar atenção à saúde da criança; Ausência de acolhimento ao primeiro contato; Presença de classificação de risco para atenção à saúde da criança; Barreiras que impedem o acesso à atenção à saúde. Concluiu-se que as famílias exibiram dificuldades para alcançar resolutividade aos problemas de saúde dos filhos, mediante a falta de acesso aos serviços de atenção primária.

  6. Uma introdução ao capitalismo dirigido pelas finanças

    Directory of Open Access Journals (Sweden)

    Robert Guttmann

    2008-11-01

    Full Text Available O capitalismo dirigido pelas finanças sempre teve uma propensão a crises financeiras em momentos fundamentais de sua expansão territorial ao trazer economias até então dirigidas pelo Estado para a órbita da regulamentação do mercado. A crise atual, todavia, é diferente. Não apenas emanou do centro, em vez surgir de algum ponto da periferia, como também revelou falhas estruturais profundas na arquitetura institucional de contratos, fundos e mercados que compunham o sistema financeiro novo e desregulamentado. Estamos diante de uma crise sistêmica, que é sempre um evento de proporções épicas e efeitos duradouros. O objetivo deste artigo é lançar uma luz sobre este momento significativo.Finance-led capitalism always has had a propensity for financial crises at key moments of its territorial expansion when bringing hitherto state-run economies into the orbit of market regulation. The current crisis, however, is different. Not only has it emanated from the center rather than hit somewhere at the periphery, but it also has revealed deep structural flaws in the institutional architecture of contracts, funds, and markets that have made up the new, deregulated system of finance. We are facing a systemic crisis, always an event of epic proportions and lasting impact. We want to shed light on this significant moment.

  7. Fusion-fission in Ar-heavy nuclei collisions

    International Nuclear Information System (INIS)

    Zaric, Alexandre

    1984-01-01

    Fusion-fission products have been studied for three reactions: Ar + Au, Ar + Bi and Ar + U (5.25-7.5 MeV/u). By measuring symmetric fragmentation components (fission-like events), cross sections for fusion were deduced and compared with the prediction of static and dynamic models. With increasing projectile energy, the width of the mass distributions strongly increases for the two lighter systems. By contrast, for Ar + U it remains essentially constant at a very large value. These results clearly demonstrate that the large increase of the width of the mass distribution cannot be attributed simply to large values of the angular momentum. However, they can be explained by the occurrence of a different dissipative process, fast fission, which can be expected if there is no barrier to fission. For the reaction Ar + Au, the total kinetic-energy distributions were also studied in detail. In this case fast fission occurs only at high incident energy. The average total kinetic energy (TKE) was found to be constant with increasing energy. (author) [fr

  8. Investigation of the energy levels of 38AR

    International Nuclear Information System (INIS)

    Waanders, F.B.

    1975-07-01

    In this project information on the energy levels of 38 Ar was obtained by means of the (p,γ) reaction. The 1,1 MeV Cockroft-Walton accelerator of the Potchefstroom University for CHE was used to produce the proton beam while a 80 cm 3 Ge(Li) detector was used to detect the gamma-rays. Precise gamma-branchings were determined for 50 bound levels, of which four have not previously been determined. These branchings were obtained from the 28 resonances studied in the 37 Cl(p,γ) 38 Ar reaction. The resonance with a proton energy of (592 plus minus 3) keV was not detected previously. The resonance energies, Q-value and energies of the bound levels used in this project were taken from the study done by Alderliesten. The mean lifetimes of a few bound levels of 38 Ar were measured by means of the doppler shift attenuation method. The results concerning the bound states and mean lifetimes are in good agreement with previous experiments. Limitations on the spin and parities of 19 (p,γ) resonances have been set by means of Weisskopf estimates. Only those cases for which the spin could be limited to two values are discussed in the text. A summary of experimental data obtained on 38 Ar is compared with the results from shellmodel calculations done by various workers. A short discussion on the analogue states in 38 Ar is also given [af

  9. Funcionalidade da oleoresina de páprica microencapsulada em goma-arábica e amido de arroz/gelatina.

    OpenAIRE

    SANTOS, A.B.; FÁVARO-TRINDADE, C.S.; GROSSO, C.R.F.

    2006-01-01

    O objetivo deste trabalho foi avaliar a funcionalidade da oleoresina de páprica microencapsulada em goma-arábica e amido de arroz/gelatina, incorporada nos sistemas-modelo bolo e gel de gelatina. Avaliou-se a cor por meio de medida instrumental e aceitação sensorial por atributos de aparência e aceitação global. O pigmento encapsulado solubilizou-se, tingiu e se distribuiu uniformemente nos bolos, os quais apresentaram boa aceitação global. Nos géis, a goma apresentou desempenho superior ao a...

  10. ONC201 Targets AR and AR-V7 Signaling, Reduces PSA, and Synergizes with Everolimus in Prostate Cancer.

    Science.gov (United States)

    Lev, Avital; Lulla, Amriti R; Ross, Brian C; Ralff, Marie D; Makhov, Petr B; Dicker, David T; El-Deiry, Wafik S

    2018-05-01

    Androgen receptor (AR) signaling plays a key role in prostate cancer progression, and androgen deprivation therapy (ADT) is a mainstay clinical treatment regimen for patients with advanced disease. Unfortunately, most prostate cancers eventually become androgen-independent and resistant to ADT with patients progressing to metastatic castration-resistant prostate cancer (mCRPC). Constitutively activated AR variants (AR-V) have emerged as mediators of resistance to AR-targeted therapy and the progression of mCRPC, and they represent an important therapeutic target. Out of at least 15 AR-Vs described thus far, AR-V7 is the most abundant, and its expression correlates with ADT resistance. ONC201/TIC10 is the founding member of the imipridone class of small molecules and has shown anticancer activity in a broad range of tumor types. ONC201 is currently being tested in phase I/II clinical trials for advanced solid tumors, including mCRPC, and hematologic malignancies. There has been promising activity observed in patients in early clinical testing. This study demonstrates preclinical single-agent efficacy of ONC201 using in vitro and in vivo models of prostate cancer. ONC201 has potent antiproliferative and proapoptotic effects in both castration-resistant and -sensitive prostate cancer cells. Furthermore, the data demonstrate that ONC201 downregulates the expression of key drivers of prostate cancer such as AR-V7 and downstream target genes including the clinically used biomarker PSA (KLK3). Finally, the data also provide a preclinical rationale for combination of ONC201 with approved therapeutics for prostate cancer such as enzalutamide, everolimus (mTOR inhibitor), or docetaxel. Implications: The preclinical efficacy of ONC201 as a single agent or in combination, in hormone-sensitive or castration-resistant prostate cancer, suggests the potential for immediate clinical translation. Mol Cancer Res; 16(5); 754-66. ©2018 AACR . ©2018 American Association for Cancer

  11. Proteína e energia na dieta de jundiás criados em tanques-rede Protein and energy in diet for catsfish raised in net cages

    Directory of Open Access Journals (Sweden)

    Jakeline Marcela Azambuja de Freitas

    2011-12-01

    Full Text Available Objetivou-se com este trabalho avaliar a influência de dois níveis de energia digestível (3.250 e 3.500 kcal kg-1 em combinação a três níveis de proteína bruta (25, 30 e 35% sobre o desempenho produtivo de juvenis de jundiá (Rhamdia voulezi. Utilizaram-se 240 juvenis de jundiá com peso inicial de 95,55±6,70 g e 20,43±1,13 cm de comprimento total, distribuídos ao acaso em 24 tanques-rede (370 L cada em delineamento fatorial com seis tratamentos e quatro repetições. O arraçoamento foi realizado quatro vezes ao dia, à vontade. Ao final do período experimental, a análise fatorial de variância evidenciou influência significativa nos parâmetros zootécnicos avaliados. Foram observados melhor ganho de peso e comprimento final médios e menor deposição de gordura visceral nos peixes alimentados com a dieta contendo 30% de proteína bruta e 3.250 kcal de energia digestível kg-1. Portanto, recomendam-se para juvenis de jundiá dietas que contenham no mínimo 30% de proteína bruta e 3.250 kcal de energia digestível kg-1 de ração.The objective of this study was to evaluate the influence of two levels of digestible energy (3250 and 3500 kcal kg-1 in conjunction with three levels of crude protein (25, 30 and 35% on the productive performance of catfish (Rhamdia voulezi juveniles. Two-hundred and forty catfish juveniles with 95.55±6.70 g average weight and 20.43±1.13 cm total length were randomly assigned into twenty-four 370 L-cages, in a factorial arrangement with six treatments and four reptitions. Feeding was performed four times a day, ad libitum. At end of experimental period, the factorial analysis of variance showed significant influence with respect to the different parameters evaluated. The fish fed with diets of 30% crude protein and 3,250 kcal digestible energy kg-1 of diet presented the best results. Therefore, diets with at least 30% crude protein and 3,250 kcal digestible energy kg-1 are recommend for catfish

  12. 40Ar-39Ar dating of terrestrial and exterrestrial materials. Basalts from the Japan Sea floor, Deccan Plateau and meteorites from Antarctica

    International Nuclear Information System (INIS)

    Kaneoka, Ichiro; Takigami, Yutaka.

    1994-01-01

    Through a series of 40 Ar- 39 Ar dating for terrestrial and exterrestrial samples, the results for basalts from the Japan Sea floor, Deccan Plateau and for meteorites from Antarctica give significant information concerning their formation histories. 40 Ar- 39 Ar ages of basalts from the Japan Sea floor give a constraint that the Japan Sea floor was formed at least 20 Ma. 40 Ar- 39 Ar ages for dyke samples from the Deccan Plateau indicate a possibility for the occurrence of a little younger ages than that of the main plateau formations by a few million years. Meteorites collected from Antarctica show some variable 40 Ar- 39 Ar ages reflecting their different thermal histories. (author)

  13. High-resolution Auger spectroscopy on 79 MeV Ar5+, 89 MeV Ar6+, and 136 MeV Ar7+ ions after excitation by helium

    International Nuclear Information System (INIS)

    Schneider, T.

    1988-01-01

    In this thesis the atomic structure of highly excited Ar 6+ and Ar 7+ ions was studied. For this 79 MeV Ar 5+ , 89 MeV Ar 6+ , and 136 MeV Ar 7+ ions of a heavy ion accelerator were excited by a He gas target to autoionizing states and the Auger electrons emitted in the decay were measured in highly-resolving state. The spectra were taken under an observational angle of zero degree relative to the beam axis in order to minimize the kinematical broadening of the Auger lines. (orig./HSI) [de

  14. As sementes geneticamente modificadas e o direito ao desenvolvimento

    Directory of Open Access Journals (Sweden)

    Milena Barbosa Melo

    2017-12-01

    Full Text Available O presente artigo apresenta como objeto de investigação a ligação entre os direitos da propriedade intelectual no contexto dos organismos geneticamente modificados (OGM´S. Objetivou-se, especificamente, responder inquietações acerca dos danos reais para os consumidores, bem como o lucro para as empresas multinacionais, sem desconsiderar, ainda, os efetivos danos ao meio ambiente e à saúde. Utilizou metodologia pautada em pesquisa bibliográfica e documental a partir do método hermenêutico fazendo uso da interpretação judicial-histórica. Conclui pela relevância da temática para efetivação do direito ao desenvolvimento, bem como pela urgência de uma regulamentação da biossegurança, de forma a permitir melhor sustentação aos OGM´s.

  15. Adesão ao tratamento no transtorno bipolar

    OpenAIRE

    Santin,Aida; Ceresér,Keila; Rosa,Adriane

    2005-01-01

    O transtorno bipolar (TB) é uma doença crônica, recorrente, presente em 1,5% da população, estando associada a altas taxas de mortalidade e prejuízos socioeconômicos. O lítio, a carbamazepina e o ácido valpróico são os estabilizadores de humor mais usados. Em tratamentos prolongados, como é o caso do TB, a má-adesão dos pacientes é uma das maiores dificuldades. Verifica-se que fatores ligados ao paciente, aos medicamentos e aos médicos possam ser responsáveis pela baixa adesão. A psicoeducaçã...

  16. Augmented reality (AR and virtual reality (VR applied in dentistry

    Directory of Open Access Journals (Sweden)

    Ta-Ko Huang

    2018-04-01

    Full Text Available The OSCE is a reliable evaluation method to estimate the preclinical examination of dental students. The most ideal assessment for OSCE is used the augmented reality simulator to evaluate. This literature review investigated a recently developed in virtual reality (VR and augmented reality (AR starting of the dental history to the progress of the dental skill. As result of the lacking of technology, it needs to depend on other device increasing the success rate and decreasing the risk of the surgery. The development of tracking unit changed the surgical and educational way. Clinical surgery is based on mature education. VR and AR simultaneously affected the skill of the training lesson and navigation system. Widely, the VR and AR not only applied in the dental training lesson and surgery, but also improved all field in our life. Keywords: OSCE, Dental simulator, Augmented reality, Virtual reality, Dentistry

  17. Augmented reality (AR) and virtual reality (VR) applied in dentistry.

    Science.gov (United States)

    Huang, Ta-Ko; Yang, Chi-Hsun; Hsieh, Yu-Hsin; Wang, Jen-Chyan; Hung, Chun-Cheng

    2018-04-01

    The OSCE is a reliable evaluation method to estimate the preclinical examination of dental students. The most ideal assessment for OSCE is used the augmented reality simulator to evaluate. This literature review investigated a recently developed in virtual reality (VR) and augmented reality (AR) starting of the dental history to the progress of the dental skill. As result of the lacking of technology, it needs to depend on other device increasing the success rate and decreasing the risk of the surgery. The development of tracking unit changed the surgical and educational way. Clinical surgery is based on mature education. VR and AR simultaneously affected the skill of the training lesson and navigation system. Widely, the VR and AR not only applied in the dental training lesson and surgery, but also improved all field in our life. Copyright © 2018. Published by Elsevier Taiwan.

  18. [VR and AR Applications in Medical Practice and Education].

    Science.gov (United States)

    Hsieh, Min-Chai; Lin, Yu-Hsuan

    2017-12-01

    As technology advances, mobile devices have gradually turned into wearable devices. Furthermore, virtual reality (VR), augmented reality (AR), and mixed reality (MR) are being increasingly applied in medical fields such as medical education and training, surgical simulation, neurological rehabilitation, psychotherapy, and telemedicine. Research results demonstrate the ability of VR, AR, and MR to ameliorate the inconveniences that are often associated with traditional medical care, reduce incidents of medical malpractice caused by unskilled operations, and reduce the cost of medical education and training. What is more, the application of these technologies has enhanced the effectiveness of medical education and training, raised the level of diagnosis and treatment, improved the doctor-patient relationship, and boosted the efficiency of medical execution. The present study introduces VR, AR, and MR applications in medical practice and education with the aim of helping health professionals better understand the applications and use these technologies to improve the quality of medical care.

  19. Effects of lamellae size distributions from 40Ar/39Ar on sedimentary thermo-chronology in the San Joaquin Basin

    International Nuclear Information System (INIS)

    Jepsen, A.-M.; Lerche, I.; Thomsen, R.O.

    1990-01-01

    A model description is provided for the release of 40 Ar/ 39 Ar from detrital microclines which specifically includes the effects of grain size distributions, thus allowing smaller grains to release argon faster than the more retentive larger grains. The model also includes the effects of sedimentary thermal history after burial influencing the pre-depositional 40 Ar/ 30 Ar ratio. Application of the model to the measured age spectra from six depths in the Tejon Block and four in the Basin Block of the San Joaquin Basin demonstrates that the grain size distribution effect plays a major role in masking the extraction of thermal history information from the observed age spectra. In addition, the grain size effect is not systematic with depth, and other competing effects, such as isotopic fractionation of diffusion coefficients, multi-provenance depositional supply, and variable concentrations of 40 Ar and 39 K per microcline at burial deposition time, make the extraction of thermal history information even more difficult. (author)

  20. Adesão ao tratamento da ambliopia

    OpenAIRE

    Arakaki,Mara Regina; Schellini,Silvana Artioli; Heimbeck,Felipe Jorge; Furuya,Margareth Tiemi; Padovani,Carlos Roberto

    2004-01-01

    OBJETIVO: Avaliar a influência da adesão no resultado do tratamento da ambliopia. MÉTODOS: Foi feito estudo retrospectivo avaliando a resposta ao tratamento da ambliopia em 151 crianças portadoras de ambliopia, tratadas com esquema de oclusão diária, com o número de dias variando de acordo com a idade da criança. Os pacientes foram separados em dois grupos que diferiam entre si pela adesão ou não ao tratamento. RESULTADOS: Observou-se que o tratamento teve melhores resultados nas crianças de ...

  1. High-Performance CCSDS AOS Protocol Implementation in FPGA

    Science.gov (United States)

    Clare, Loren P.; Torgerson, Jordan L.; Pang, Jackson

    2010-01-01

    The Consultative Committee for Space Data Systems (CCSDS) Advanced Orbiting Systems (AOS) space data link protocol provides a framing layer between channel coding such as LDPC (low-density parity-check) and higher-layer link multiplexing protocols such as CCSDS Encapsulation Service, which is described in the following article. Recent advancement in RF modem technology has allowed multi-megabit transmission over space links. With this increase in data rate, the CCSDS AOS protocol implementation needs to be optimized to both reduce energy consumption and operate at a high rate.

  2. Characterization of a novel androgen receptor (AR) coregulator RIPK1 and related chemicals that suppress AR-mediated prostate cancer growth via peptide and chemical screening.

    Science.gov (United States)

    Hsu, Cheng-Lung; Liu, Jai-Shin; Lin, Ting-Wei; Chang, Ying-Hsu; Kuo, Yung-Chia; Lin, An-Chi; Ting, Huei-Ju; Pang, See-Tong; Lee, Li-Yu; Ma, Wen-Lung; Lin, Chun-Cheng; Wu, Wen-Guey

    2017-09-19

    Using bicalutamide-androgen receptor (AR) DNA binding domain-ligand binding domain as bait, we observed enrichment of FxxFY motif-containing peptides. Protein database searches revealed the presence of receptor-interacting protein kinase 1 (RIPK1) harboring one FxxFY motif. RIPK1 interacted directly with AR and suppressed AR transactivation in a dose-dependent manner. Domain mapping experiments showed that the FxxFY motif in RIPK1 is critical for interactions with AR and the death domain of RIPK1 plays a crucial role in its inhibitory effect on transactivation. In terms of tissue expression, RIPK1 levels were markedly higher in benign prostate hyperplasia and non-cancerous tissue regions relative to the tumor area. With the aid of computer modeling for screening of chemicals targeting activation function 2 (AF-2) of AR, we identified oxadiazole derivatives as good candidates and subsequently generated a small library of these compounds. A number of candidates could effectively suppress AR transactivation and AR-related functions in vitro and in vivo with tolerable toxicity via inhibiting AR-peptide, AR-coregulator and AR N-C interactions. Combination of these chemicals with antiandrogen had an additive suppressive effect on AR transcriptional activity. Our collective findings may pave the way in creating new strategies for the development and design of anti-AR drugs.

  3. Regulation of AR Degradation and Function by Ubiquitylation

    Science.gov (United States)

    2015-10-01

    have carried out similar analyses from androgen ( DHT ) stimulated VCaP cells. The combined results from a series of LC-MS/MS analyses of DHT stimulated...minus or plus DHT . AR was then isolated from whole cell lysates and run on SDS-PAGE, followed by excision of area ~100 Kd (mono or possibly oligo...the stably expressed AR WT versus K911R mutant. As shown in figure 1B, the K911R mutant had increased activity in response to 1 nM DHT . Finally

  4. Axenfeld-Rieger syndrome (ARS): A review and case report.

    LENUS (Irish Health Repository)

    Waldron, Jennie M

    2011-08-29

    Axenfeld-Rieger syndrome (ARS) is a rare, autosomal dominant condition characterized by ocular, craniofacial, dental, and periumbilical abnormalities. Relatively little information exists on this syndrome within the dental literature despite the fact that midface hypoplasia and maxillary hypodontia are classical presenting features of this syndrome. This is a case report of a 7-year-old Caucasian female with ARS who presented with significant ocular and dental anomalies. She was also found to have osteopenia. Her dental condition is described, her immediate treatment is shown, and her long-term treatment needs are discussed.

  5. Aspects of What Makes or Breaks a Museum AR Experience

    DEFF Research Database (Denmark)

    Madsen, Claus B.; Madsen, Jacob Boesen; Morrison, Ann

    2012-01-01

    The paper critically evaluates central aspects of an iPad AR application developed for a museum context. The application is designed for children aged 8 to 12 and mixes AR and mini-game elements to convey dramatized historical events. The game has been deployed for roughly 3 months and the findings...... in the paper are supported by extensive in-application activity logging. Actual usage of the application at the museum proved far less extensive than envisaged. Hypotheses for this finding are presented and discussed, with support from the logging data....

  6. Interatomic scattering in energy dependent photoelectron spectra of Ar clusters

    Energy Technology Data Exchange (ETDEWEB)

    Patanen, M.; Benkoula, S.; Nicolas, C.; Goel, A. [Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex (France); Antonsson, E. [Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex (France); Physikalische und Theoretische Chemie Institut für Chemie und Biochemie, Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin (Germany); Neville, J. J. [Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex (France); Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick E3B 6E2 (Canada); Miron, C., E-mail: Catalin.Miron@synchrotron-soleil.fr [Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex (France); Extreme Light Infrastructure - Nuclear Physics (ELI-NP), ‘Horia Hulubei’ National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Măgurele, Jud. Ilfov (Romania)

    2015-09-28

    Soft X-ray photoelectron spectra of Ar 2p levels of atomic argon and argon clusters are recorded over an extended range of photon energies. The Ar 2p intensity ratios between atomic argon and clusters’ surface and bulk components reveal oscillations similar to photoelectron extended X-ray absorption fine structure signal (PEXAFS). We demonstrate here that this technique allows us to analyze separately the PEXAFS signals from surface and bulk sites of free-standing, neutral clusters, revealing a bond contraction at the surface.

  7. Experimental Determination of the Cosmogenic Ar Production Rate From Ca

    Science.gov (United States)

    Niedermann, S.; Schäfer, J. M.; Wieler, R.; Naumann, R.

    2005-12-01

    Cosmogenic 38Ar is produced in terrestrial surface rocks by spallation of target nuclides, in particular K and Ca. Though the presence of cosmogenic Ar in Ca-rich minerals has been demonstrated earlier [1], is has proven difficult to establish its production rate. To circumvent problems connected to 36Ar production by 35Cl neutron capture and different production rates from K and Ca, we have analyzed the noble gases in seven pyroxene separates (px) from the Antarctic Dry Valleys which are essentially free of Cl and K. The px were obtained from dolerite rocks, for which 3He and 21Ne exposure ages from 1.5 to 6.5 Ma have been reported [2]. The noble gases were extracted in two or three heating steps at GFZ Potsdam, yielding 38Ar/36Ar ratios up to 0.2283 ± 0.0008 (air: 0.1880). Ca (3.7-11.2 wt. %) is expected to be the only relevant target element for Ar production in the five pure px (ratio of 1.5 ± 0.2, we obtain cosmogenic 38Ar concentrations between 130 and 530x106 atoms/g. The 38Ar production rate was calculated based on 21Ne exposure ages [2], corrected for elevated nuclide production in Antarctica due to prevailing low air pressure and for the revised 21Ne production rate from Si. We obtain values between 188 ± 17 and 243 +110/-24 atoms (g Ca)-1 a-1 at sea level and high (northern) latitudes for four out of the five pure px, while one yields a very high value of 348 ± 70 atoms (g Ca)-1 a-1. Values above 250 atoms (g Ca)-1 a-1 are also obtained from two less pure px containing 0.3 and 0.9% K and from one feldspar/quartz accumulate, indicating that the production rate from K may be higher than that from Ca. The weighted mean (excluding the outlier) of ~200 atoms (g Ca)-1 a-1 is in excellent agreement with Lal's [3] theoretical estimate. [1] Renne et al., EPSL 188 (2001) 435. [2] Schäfer et al., EPSL 167 (1999) 215. [3] Lal, EPSL 104 (1991) 424.

  8. ATENDIMENTO AO DEPENDENTE QUÍMICO NA ESTRATÉGIA SAÚDE DA FAMÍLIA

    Directory of Open Access Journals (Sweden)

    Joelma Amélia Muniz

    2010-01-01

    Full Text Available A estratégia saúde da família (ESF é a base para a estrutura desse tipo de atendimento, uma vez que proporciona ao profissional a possibilidade de conhecer o meio em que seu paciente está inserido e também propiciar mudanças nesse meio. O presente trabalho se propôs a refletir sobre a capacitação e habilidade do profissional de enfermagem, envolvido no processo de acolhimento, encaminhamentos e recuperação do dependente químico. Essa pesquisa baseou-se em revisão bibliográfica usando como material: artigos, periódicos, manuais, dissertação, sites e livros referentes ao tema. Percebeu-se que a capacitação e educação permanente dos profissionais envolvidos no processo da recuperação do dependente de substâncias psicoativas são de indiscutível importância. Identificou-se que, além de promover a capacitação a equipe, o chefe da equipe de enfermagem deve perceber quais são os profissionais que possuem maior afinidade com esse tipo de atendimento, para após isso, designar tais profissionais à essa tarefa, eassim, alcançar melhores resultados.

  9. Single-electron capture into Ar+ excited states in Ar2 + Na collision below 12 keV, 1

    International Nuclear Information System (INIS)

    Matsumoto, Atsushi; Tsurubuchi, Seiji; Okuno, Kazuhiko; Ohtani, Shunsuke; Iwai, Tsuruji.

    1979-08-01

    Emission spectra between 2800 and 6000 A have been observed at the ionic energies from 0.2 to 12 keV. Absolute measurements of emission cross-sections have been made for the emission lines coming from ArII excited states at 4 and 8 keV with a crossed-beam technique. Processes of single-electron capture into the ArII 4p- and 4p'-states, with exothermicity of a few eV, take place dominantly (--10 15 cm 2 ), while the endothermic processes producing ArII in the 4d- and 5s-states occur with small cross-sections. Sum of the cross-sections for electron capture into the excited states observed is comparable with the total single-electron capture cross-section estimated from attenuation measurements of ion currents. Possible errors and uncertainties are discussed. (author)

  10. Single-electron capture into Ar+ excited states in Ar2++Na collision below 12 keV, 1

    International Nuclear Information System (INIS)

    Matsumoto, Atsushi; Tsurubuchi, Seiji; Iwai, Tsuruji; Ohtani, Shunsuke; Okuno, Kazuhiko

    1980-01-01

    Emission spectra between 2800 and 6000 A have been observed at the ionic energies from 0.2 to 12 keV. Absolute measurements of emission cross-sections have been made for the emission lines coming from ArII excited states at 4 and 8 keV with a crossed-beam technique. Processes of single-electron capture into the ArII 4p- and 4p'-states, with exothermicity of a few eV, take place dominantly (--10 -15 cm 2 ), while the endothermic processes producing ArII in the 4d- and 5s-states occur with small cross-sections. Sum of the cross-sections for electron capture into the excited states observed is comparable with the total single-electron capture cross-section estimated from attenuation measurements of ion currents. Possible errors and uncertainties are discussed. (author)

  11. K-Ar and Ar-Ar dating of the Palaeozoic metamorphic complex from the Mid-Bosnian Schist Mts., Central Dinarides, Bosnia and Hercegovina

    International Nuclear Information System (INIS)

    Pamic, J.; Balogh, K.; Hrvatovic, H.; Balen, D.; Palinkas, L.; Jurkovic, I.

    2004-01-01

    K-Ar and Ar-Ar whole rock and mineral ages are presented for 25 samples of metamorphic rocks from the Mid-Bosnian Schist Mts., representing one of the largest allochthonous Palaeozoic terranes incorporated within the Internal Dinarides. Four main age groups can be distinguished: 1) Variscan (∼ 343 Ma), 2) post-Variscan (288-238 Ma), 3) Early Cretaceous (mainly 121-92 Ma), and 4) Eocene (59--35 Ma) ages. Apart from this, an Oligocene (31 Ma) age was obtained on Alpine vein hyalophane. The radiometric dating indicates a polyphase metamorphic evolution of the Palaeozoic formations and suggests a pre-Carboniferous age of the volcano-sedimentary protoliths, an Early Carboniferous age of Variscan metamorphism and deformation, post-Variscan volcanism, an Early Cretaceous metamorphic overprint related to out-of-sequence thrusting of the Palaeozoic complex, and an Eocene and Oligocene metamorphic overprint related to the main Alpine compressional deformation and subsequent strike-slip faulting, and uplift of the metamorphic core. Accordingly, the Mid-Bosnian Schist Mts. can be correlated in its multistage geodynamic evolution with some Palaeozoic tectonostratigraphic units from the Austroalpine domain in the Eastern Alps. (author)

  12. 40Ar/39Ar and K/Ar whole rock age constraints on the timing of regional deformation, South Coast of New South Wales, Lachlan Fold Belt, Southeastern Australia: problems and implications

    International Nuclear Information System (INIS)

    Phillips, D.; Fergusson, C.L.

    1999-01-01

    Full text: Subduction complex rocks are well exposed on the south coast of New South Wales around Batemans Bay. Farther south in the Narooma and Bermagui region, Offier et al (1998) have determined two 40 Ar/ 39 Ar ages of 450 ± 3 Ma and 445 ± 2 Ma. They argued that these ages constrain the timing of intense underplating-related deformation and we have undertaken farther work, from an area south of Batemans Bay, to test this suggestion. The 40 Ar/ 39 Ar method applied to fine-grained, low temperature metamorphic rocks, such as slates, is beset by the problem of recoil loss and/or redistribution of 39 Ar during the irradiation process. Another problem is the difficulty of distinguishing between the contributions to 40 Ar/ 39 Ar spectra from illite/muscovite grown during the cleavage-producing deformation and detrital muscovite/illite. In the current study, four slate samples, with variable contents of detrital white mica, were analysed by both the K-Ar and 40 Ar/ 39 Ar step-heating methods. A separate of detrital white mica from one slate sample yields a plateau age of 500 ± 2 Ma. This result indicates that inheritance has not been eliminated by metamorphism as is commonly assumed and that the 40 Ar/ 39 Ar ages provide only a maximum estimate for the timing of deformation. 40 Ar/ 39 Ar analyses of state chips yield discordant, saddle-shaped age spectra, with minimum, within-saddle' ages of ca. 420 Ma. Two slate samples give identical 40 Ar/ 39 Ar integrated ages of 455 ± 2 Ma. One sample contains relatively abundant detrital bedding-parallel mica flakes that are locally oblique to the regional cleavage in the rock. The 40 Ar/ 39 Ar ages are some 20 Ma older than K-Ar ages for these same samples, suggesting that recoil loss of 39 Ar may also have affected these slates. Both recoil loss of 39 Ar and inherited white micas will yield elevated apparent ages, thus providing only maximum ages for the cleavage-producing deformation. Two other samples from slaty tectonic

  13. A Prediction of the Damping Properties of Hindered Phenol AO-60/polyacrylate Rubber (AO-60/ACM) Composites through Molecular Dynamics Simulation

    Science.gov (United States)

    Yang, Da-Wei; Zhao, Xiu-Ying; Zhang, Geng; Li, Qiang-Guo; Wu, Si-Zhu

    2016-05-01

    Molecule dynamics (MD) simulation, a molecular-level method, was applied to predict the damping properties of AO-60/polyacrylate rubber (AO-60/ACM) composites before experimental measures were performed. MD simulation results revealed that two types of hydrogen bond, namely, type A (AO-60) -OH•••O=C- (ACM), type B (AO-60) - OH•••O=C- (AO-60) were formed. Then, the AO-60/ACM composites were fabricated and tested to verify the accuracy of the MD simulation through dynamic mechanical thermal analysis (DMTA). DMTA results showed that the introduction of AO-60 could remarkably improve the damping properties of the composites, including the increase of glass transition temperature (Tg) alongside with the loss factor (tan δ), also indicating the AO-60/ACM(98/100) had the best damping performance amongst the composites which verified by the experimental.

  14. DA PSICODINÂMICA DO TRABALHO AO DIREITO FUNDAMENTAL AO CONTEÚDO DO PRÓPRIO TRABALHO E AO MEIO AMBIENTE ORGANIZACIONAL SAUDÁVEL

    OpenAIRE

    Wandelli, Leonardo Vieira

    2015-01-01

    O presente artigo procura traçar alguns elementos que pretendem articular como, a partir do discurso jurídico, podem ser significados os aportes sobre saúde e trabalho, especialmente aqueles trazidos pela abordagem da Psicodinâmica do Trabalho. Um caminho, assim, que vai dos estudos sobre sujeito, trabalho e saúde até o Direito Constitucional, que afirma como seu fundamento a dignidade humana, indissociável da centralidade antropológica do trabalho; um vínculo expressado pelo direito fundamen...

  15. 40Ar/ 39Ar and paleomagnetic results from Liberia and the Precambrian APW data base for the West African Shield

    Science.gov (United States)

    Onstott, T. C.; Dorbor, J.

    Lower amphibolite to granulite facies metamorphic rocks in Nimba County, Liberia have yielded 2.2-2.9 Ga RbSr whole rock ages, indicating that they are part of the Archean Liberian age province. We report a 2040 Ma 4040Ar/ 39Ar plateau date on hornblende from an amphibolite in this region, and suggest that these rocks were also severelyreworked during the Eburnean (˜2.0 Ga) metamorphic episode. 40Ar/ 39Ar analyses of biotite and feldspars from neighboring schists also indicate the presence of two mild thermal events, at 1.5 Ga and 0.6 Ga. Paleomagnetic analyses of samples from these same metamorphic rocks reveal three components of magnetization. The predominant and most stable component (273°E, 21°N) is considered to have been acquired as a result of pos Eburnean uplift and cooling at ˜ 2.0 Ga, whereas the two less stable components with poles at 235°E, 43°N and 16°E, 36°N, probably correlate with the 1.5 Ga and 0.6 Ga thermal pulses, respectively. Rock units from southern Liberia also yield two secondary magnetizations, one at 247°E, 37°N and the other at 104°E, 5°N, and a 1.5 Ga 40Ar/ 39Ar date on plagioclase. Comparison of the paleomagnetic poles corresponding to the ˜2.0 Ga Eburnean component with published paleomagnetic data for West Africa is not consistent with prior interpretations of the polar wander path for West Africa. Our paleomagnetic data, when compared to poles of comparable age from the Kalahari Shield, still suggest that some form of displacement has occurred between the Kalahari and West African Shields since 2.0 Ga.

  16. Timing of Secondary Hydrothermal Alteration of the Luobusa Chromitites Constrained by Ar/Ar Dating of Chrome Chlorites

    Directory of Open Access Journals (Sweden)

    Wei Guo

    2018-05-01

    Full Text Available Chrome chlorites are usually found as secondary phases formed by hydrothermal alteration of chromite deposits and associated mafic/ultramafic rocks. Here, we report the 40Ar/39Ar age of chrome chlorites separated from the Luobusa massive chromitites which have undergone secondary alteration by CO2-rich hydrothermal fluids. The dating results reveal that the intermediate heating steps (from 4 to 10 of sample L7 generate an age plateau of 29.88 ± 0.42 Ma (MSWD = 0.12, plateau 39Ar = 74.6%, and the plateau data points define a concordant inverse isochron age of 30.15 ± 1.05 Ma (MSWD = 0.08, initial 40Ar/36Ar = 295.8 ± 9.7. The Ar release pattern shows no evidence of later degassing or inherited radiogenic component indicated by an atmospheric intercept, thus representing the age of the hydrothermal activity. Based on the agreement of this hydrothermal age with the ~30 Ma adakitic plutons exposed in nearby regions (the Zedong area, tens of kilometers west Luobusa and the extensive late Oligocene plutonism distributed along the southeastern Gangdese magmatic belt, it is suggested that the hydrothermal fluids are likely related to the ~30 Ma magmatism. The hydrothermal fluid circulation could be launched either by remote plutons (such as the Sangri granodiorite, the nearest ~30 Ma pluton west Luobusa or by a similar coeval pluton in the local Luobusa area (inferred, not found or reported so far. Our results provide important clues for when the listwanites in Luobusa were formed.

  17. Astronomically calibrated 40Ar/39Ar age for the Toba supereruption and global synchronization of late Quaternary records

    Science.gov (United States)

    Storey, Michael; Roberts, Richard G.; Saidin, Mokhtar

    2012-11-01

    The Toba supereruption in Sumatra, ∼74 thousand years (ka) ago, was the largest terrestrial volcanic event of the Quaternary. Ash and sulfate aerosols were deposited in both hemispheres, forming a time-marker horizon that can be used to synchronize late Quaternary records globally. A precise numerical age for this event has proved elusive, with dating uncertainties larger than the millennial-scale climate cycles that characterized this period. We report an astronomically calibrated 40Ar/39Ar age of 73.88 ± 0.32 ka (1σ, full external errors) for sanidine crystals extracted from Toba deposits in the Lenggong Valley, Malaysia, 350 km from the eruption source and 6 km from an archaeological site with stone artifacts buried by ash. If these artifacts were made by Homo sapiens, as has been suggested, then our age indicates that modern humans had reached Southeast Asia by ∼74 ka ago. Our 40Ar/39Ar age is an order-of-magnitude more precise than previous estimates, resolving the timing of the eruption to the middle of the cold interval between Dansgaard-Oeschger events 20 and 19, when a peak in sulfate concentration occurred as registered by Greenland ice cores. This peak is followed by a ∼10 °C drop in the Greenland surface temperature over ∼150 y, revealing the possible climatic impact of the eruption. Our 40Ar/39Ar age also provides a high-precision calibration point for other ice, marine, and terrestrial archives containing Toba sulfates and ash, facilitating their global synchronization at unprecedented resolution for a critical period in Earth and human history beyond the range of 14C dating.

  18. Geochronological 40Ar/39Ar data on the submarine fault-scarps in the Sardinia channel (western mediterranean)

    International Nuclear Information System (INIS)

    Bouillin, J.P.; Tricart, P.; Mascle, G.; Monie, P.; Rolfo, F.; Torelli, L.

    1999-01-01

    Granite and gneiss have been sampled on the submarine fault scarps of the Sardinia Channel and have been dated using the 40 Ar/ 39 Ar method. The majority of rocks partially preserve Hercynian ages. Some of them display Lower Cretaceous ages. In addition, Upper Eocene-Oligocene argon resetting is recorded only in rocks from the southeast sector of the Channel. We thus propose that the basement of the Sardinia Channel occupied a shallow position within the stack of the Alpine tectonic units, behind the more deformed front of the internal zones of the Maghrebide Chain. (authors)

  19. Absolute total and one and two electron transfer cross sections for Ar8+ on Ar as a function of energy

    International Nuclear Information System (INIS)

    Vancura, J.; Kostroun, V.O.

    1992-01-01

    The absolute total and one and two electron transfer cross sections for Ar 8+ on Ar were measured as a function of projectile laboratory energy from 0.090 to 0.550 keV/amu. The effective one electron transfer cross section dominates above 0.32 keV/amu, while below this energy, the effective two electron transfer starts to become appreciable. The total cross section varies by a factor over the energy range explored. The overall error in the cross section measurement is estimated to be ± 15%

  20. Adesão ao tratamento da ambliopia

    Directory of Open Access Journals (Sweden)

    Arakaki Mara Regina

    2004-01-01

    Full Text Available OBJETIVO: Avaliar a influência da adesão no resultado do tratamento da ambliopia. MÉTODOS: Foi feito estudo retrospectivo avaliando a resposta ao tratamento da ambliopia em 151 crianças portadoras de ambliopia, tratadas com esquema de oclusão diária, com o número de dias variando de acordo com a idade da criança. Os pacientes foram separados em dois grupos que diferiam entre si pela adesão ou não ao tratamento. RESULTADOS: Observou-se que o tratamento teve melhores resultados nas crianças de 4 a 7 anos e que aderiram ao tratamento; as crianças que aderiram ao tratamento necessitaram de tempo menor de permanência em tratamento. Mesmo crianças com idade superior a 7 anos tiveram resultados positivos com a oclusão. CONCLUSÃO:O tratamento oclusivo é um meio terapêutico eficiente desde que haja a cooperação do paciente.

  1. Resposta ao estresse: II. Resiliência e vulnerabilidade

    Directory of Open Access Journals (Sweden)

    Nicole Leite Galvão-Coelho

    2015-06-01

    Full Text Available ResumoA crescente exposição a estressores na vida cotidiana aumentou significativamente a investigação da resposta ao estresse nas duas últimas décadas. Embora associada a consequências negativas, pois muitas patologias físicas e mentais são desencadeadas por exposição crônica a estressores, esta resposta é indispensável para sobrevivencia do indivíduo e é extremamente adaptativa quando ativada de forma aguda. Na parte I desta revisão foram abordados os conceitos de homestase e alostase e os sistemas fisiológicos ativados durante a resposta ao estresse. Na parte II serão discutidos fatores que modulam a resposta ao estresse tais como sexo, temperamento, períodos críticos do desenvolvimento e a presença ou ausência de suporte social. A interação entre os fatores genéticos e ambientais gera os perfis da resposta psicofisiológica que caracterizam os fenótipos de susceptibilidade e resiliência frente aos estressores e sua relação com uma patologia mental cada vez mais presente na sociedade moderna, o transtorno de estresse pós-traumático.

  2. Polycladida from Curaçao and faunistically related regions

    NARCIS (Netherlands)

    Bois-Reymond Marcus, du Eveline; Marcus, Ernst

    1968-01-01

    Professor Dr. DIVA DINIZ CORRÊA, Head of the Department of Zoology of the University of São Paulo, was able to work at the “Caraïbisch Marien-Biologisch Instituut” (Caribbean Marine Biological Institute: Carmabi) at Curaçao from December 1965 to March 1966, thanks to a grant received from the

  3. Reptiles and Amphibians of Curaçao

    NARCIS (Netherlands)

    Rooij, de Nelly

    1922-01-01

    The Zoological Museum of Amsterdam received some collections of reptiles from Curaçao made by Dr. J. BOEKE in 1905, by Dr. C. J. VAN DER HORST in 1920 and by Mr. G. J. H. MOLENGRAAFF „Engineer” in 1921. I had the opportunity of studying them and will here give an enumeration of all the reptiles

  4. On some Polychaetous Annelids from Curaçao

    NARCIS (Netherlands)

    Horst, R.

    1922-01-01

    Though we know already a rather large number of Polychaetous Annelids from the Caribbean Sea, hitherto, as far as I know, no Annelids have been described from the coast of the island Curaçao and I therefore was very glad, that my colleague Dr. VAN DER HORST kindly placed in my hands for

  5. Tolerância de porta-enxertos de videira ao alumínio do solo

    Directory of Open Access Journals (Sweden)

    José Carlos Fráguas

    1999-07-01

    Full Text Available Onze porta-enxertos e duas cultivares americanas de videira (Vitis spp foram avaliadas mediante níveis de saturação por Al no solo (Cambissolo Húmico álico, objetivando alcançar a tolerância diferenciada ao Al. O trabalho foi conduzido em casa de vegetação, com seis tratamentos completamente casualizados e quatro repetições, na Embrapa-Centro Nacional de Pesquisa de Uva e Vinho, em Bento Gonçalves, RS, no período de 1987 a 1990. As características avaliadas foram: altura das plantas, comprimento das raízes, peso da matéria seca da parte aérea e das raízes e teores de P, K, Ca e Mg em folhas e raízes. Diante dos acréscimos ou aumentos verificados em cada característica (variação % e por cultivar, foi possível estabelecer a tolerância diferenciada das cultivares. O teor de K na parte aérea não foi afetado pelos níveis de saturação por Al, enquanto os teores de Ca e Mg foram os mais afetados. O teor de P teve um comportamento estável entre os níveis de saturação por Al. As cultivares Isabel e Cunningham apresentaram diferença na tolerância ao Al do solo; a Cunningham teve melhor comportamento. Os porta-enxertos R99, Rupestris du Lot e Kober 5BB, juntamente com Isabel, foram os mais sensíveis ao Al, e P1103, 101-14 e 196-17Cl foram os mais tolerantes.

  6. Fatores de correção para perímetro escrotal ao sobreano para tourinhos mestiços Aberdeen Angus x Nelore Adjustment factors for scrotal circumference at yearling for crossbred Aberdeen Angus x Nelore young bulls

    Directory of Open Access Journals (Sweden)

    J.S. Lopes

    2009-04-01

    Full Text Available Obtiveram-se fatores de correção (FC para o perímetro escrotal ao sobreano (PES para os efeitos de grupo genético (GG, heterozigose individual (HI, peso ao sobreano (PS e idade do animal à pesagem de sobreano (IDS, utilizando-se registros de peso corporal e medidas de perímetro escrotal obtidos de 11.662 tourinhos das raças Aberdeen Angus, Nelore e de produtos do cruzamento entre elas, criados nas regiões Sul, Sudeste e Centro-Oeste do Brasil, nascidos entre 1987 e 2001. Os coeficientes de regressão que geraram os FC foram estimados pelo método dos quadrados mínimos, adotando um modelo que incluiu os efeitos de grupo de contemporâneos ao sobreano (GC, GG, heterozigose materna (HM, HI, PS e IDS. Todos os efeitos incluídos no modelo foram significativos (PAdjustment factors (AF for scrotal circumference at yearling (SCY were figured out for effects of genetic group (GG, individual heterozygosis (IH, yearling weight (YW, and age of the animal at yearling weight (AYW using body weight and scrotal circumference records from 11,662 Aberdeen Angus, Nelore, and their crosses. The animals were born from 1987 to 2001 and were raised in the South East and Central West Regions of Brazil. The regression coefficients to obtain AF were estimated by least squares means method. The model included the fixed effects of contemporaneous group at yearling (CG, maternal heterozygosis (MH, IH, and the covariates YW (linear and quadratic effects and AYW (linear effect. All the factors included in the model showed significant effects (P<0.01 on SCY. The mean and standard deviation for SCY were 29.90±3.55cm. Quadratic effect of YW on SCY was also observed. Decreases in SCY with the increase in YW was found. High SCY was observed immediately after post-weaning. The YW effects on SCY were 0.06695804±0.00345000cm/kg (linear effect and -0.00005252±0.00000508cm/kg² (quadratic effect. The AYW linear effect on SCY was 0.02176450±0.00038568cm/day. The factors

  7. Collisional excitation of ArH+ by hydrogen atoms

    Science.gov (United States)

    Dagdigian, Paul J.

    2018-06-01

    The rotational excitation of the 36ArH+ ion in collisions with hydrogen atoms is investigated in this work. The potential energy surface (PES) describing the 36ArH+-H interaction, with the ion bond length r fixed at the average of r over the radial v = 0 vibrational state distribution, was obtained with a coupled cluster method that included single, double, and (perturbatively) triple excitations [RCCSD(T)]. A deep minimum (De = 3135 cm-1) in the PES was found in linear H-ArH+ geometry at an ion-atom separation Re = 4.80a0. Energy-dependent cross-sections and rate coefficients as a function of temperature for this collision pair were computed in close-coupling (CC) calculations. Since the PES possesses a deep well, this is a good system to test the performance of the quantum statistical (QS) method developed by Manolopoulos and co-workers as a more efficient method to compute the cross-sections. Good agreement was found between rate coefficients obtained by the CC and QS methods at several temperatures. In a simple application, the excitation of ArH+ is simulated for conditions under which this ion is observed in absorption.

  8. Precision lifetime measurements of Ar II 4p doublet levels

    International Nuclear Information System (INIS)

    Marger, D.; Schmoranzer, H.

    1990-01-01

    The lifetimes of the Ar II 4p doublet fine-structure levels 4p 2 D 0 5/2 , 4p' 2 F 0 5/2 and 4p' 2 F 0 7/2 were measured by beam-dye laser spectroscopy. The experimental uncertainty was reduced to below 1%. (orig.)

  9. Professor Oberth and Dr. von Braun at ARS Banquet

    Science.gov (United States)

    1961-01-01

    Dr. Wernher von Braun holds the coveted Hermarn Oberth award presented to him by Professor Oberth during the banquet hosted by the Alabama Section of the American Rocket Society (ARS), on October 19, 1961. The Oberth award was given for outstanding technical contributions to the field of astronautics or for the promotion and advancement of astronautical sciences.

  10. Plasma based Ar+ beam assisted poly(dimethylsiloxane) surface modification

    International Nuclear Information System (INIS)

    Vladkova, T.G.; Keranov, I.L.; Dineff, P.D.; Youroukov, S.Y.; Avramova, I.A.; Krasteva, N.; Altankov, G.P.

    2005-01-01

    Plasma based Ar + beam performed in RF (13.56 MHz) low-pressure (200 mTorr) glow discharge (at 100 W, 1200 W and 2500 W) with a serial capacitance was employed for surface modification of poly(dimethylsiloxane) (PDMS) aimed at improvement of its interactions with living cells. The presence of a serial capacitance ensures arise of an ion-flow inside the plasma volume directed toward the treated sample and the vary of the discharge power ensures varied density of the ion-flow. XPS analysis was performed to study the changes in the surface chemical composition of the modified samples and the corresponding changes in the surface energy were monitored by contact angle measurements. We found that plasma based Ar + beam transforms the initially hydrophobic PDMS surface into a hydrophilic one mainly due to a raising of the polar component of the surface tension, this effect being most probably due to an enrichment of the modified surface layer with permanent dipoles of a [SiO x ]-based network and elimination of the original methyl groups. The initial adhesion of human fibroblast cells was studied on the described above plasma based Ar + beam modified and acrylic acid (AA) grafted or not fibronectin (FN) pre-coated or bare surfaces. The cell response seems to be related with the peculiar structure and wettability of the modified PDMS surface layer after plasma based Ar + beam treatment followed or not by AA grafting

  11. A Carbon Cycle Science Update Since IPCC AR-4

    NARCIS (Netherlands)

    Dolman, A.J.; Werf, van der G.R.; Molen, van der M.K.; Ganssen, G.; Erisman, J.W.; Strengers, B.

    2010-01-01

    We review important advances in our understanding of the global carbon cycle since the publication of the IPCC AR4. We conclude that: the anthropogenic emissions of CO2 due to fossil fuel burning have increased up through 2008 at a rate near to the high end of the IPCC emission scenarios; there are

  12. Electron impact ionization of Ar/sup 8 +/

    Energy Technology Data Exchange (ETDEWEB)

    Defrance, P.; Rachafi, S.; Jureta, J.; Meyer, F.; Chantrenne, S.

    1986-01-01

    Absolute electron impact ionization cross-sections have been measured for the Neon-like Ar/sup 8 +/ in the energy range from below the threshold for the metastable state to 2500 eV. No contribution of metastable states is observed. The results are well reproduced by the Distorted Wave Born Approximation. 12 refs., 1 fig.

  13. CARCASS AND MEAT QUALITY OF AFRICANDER Ar{D TERSEY ...

    African Journals Online (AJOL)

    wore not sgnificantlf diffcrent bctw€cn thc fiw typer of stcers. The Jersy oompares ... was determined by a method similar to that of Hill (1966). Muscle samples wcre herted for ... than thc Jerscy croscs (7t ar comparcd to 9Jt). Thc ud- mds with thc ...

  14. The ARS Culture Collection and Developments in Biotechnology

    Science.gov (United States)

    The ARS Culture Collection (NRRL) has played a prominent role in the development of biotechnology since its founding in 1940 when the Northern Regional Research Laboratory opened. Early discoveries included selection of production strains for penicillin, dextran blood extender, xanthan gum and the v...

  15. Backbendings of superdeformed bands in 36;40Ar

    Science.gov (United States)

    Xiang, Xu-Hui; He, Xiao-Tao

    2018-05-01

    Experimentally observed superdeformed (SD) rotational bands in 36Ar and 40Ar are studied by the cranked shell model (CSM) with the pairing correlations treated by a particle-number-conserving (PNC) method. This is the first time that PNC-CSM calculations have been performed on the light nuclear mass region around A=40. The experimental kinematic moments of inertia J (1) versus rotational frequency are reproduced well. The backbending of the SD band at frequency around ℏω=1.5 MeV in 36Ar is attributed to the sharp rise of the simultaneous alignments of the neutron and proton 1d 5/2[202]5/2 pairs and 1f 7/2[321]3/2 pairs, which is a consequence of the band crossing between the 1d 5/2[202]5/2 and 1f 7/2[321]3/2 configuration states. The gentle upbending at low frequency of the SD band in 40Ar is mainly affected by the alignments of the neutron 1f 7/2[321]3/2 pairs and proton 1d 5/2[202]5/2 pairs. The PNC-CSM calculations show that besides the diagonal parts, the off-diagonal parts of the alignments play an important role in the rotational behavior of the SD bands. Supported by National Natural Science Foundation of China (11775112 and 11275098) and the Priority Academic Program Development of Jiangsu Higher Education Institutions

  16. The Educational Values of Athiyyah ar-Rahman Book

    Directory of Open Access Journals (Sweden)

    Maya Yunita

    2018-04-01

    Full Text Available Athiyyah ar-Rahman is an influential book which written by Muhammad Azhari al-Palembani ibn Abdullah ibn Ahmad or also known as Kemas Azhari (1811-1874. The book was written in 1842 and until today is learned by Islamic community in Palembang. This article tries to elucidate the values of Athiyyah ar-Rahman book from education perspectives. The discourse-historical approach of Reisigl and Wodak (2008 is used to analyze the book. The findings show that Athiyyah ar-Rahman describes six pillars of Islam. The six pillars of Islam are framing three dimensions, including personal dimension, social dimension, and transformative dimension. The personal dimension relates to the core of the education to construct the self of student. The social dimension relates to the visions for harmonizing among humans and between humans and nature. Meanwhile, the transformational dimension relates to the effect of education to solve the problems in human life as well as transform the society. Based on the analysis, the educational values of Athiyyah ar-Rahman could be summarized as follows: religiosity, spirituality, morality, solidarity, tolerance, environmentalism, pragmatism and transformational.

  17. 75 FR 10845 - Arkansas Disaster Number AR-00042

    Science.gov (United States)

    2010-03-09

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12034 and 12035] Arkansas Disaster Number AR-00042 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  18. 76 FR 35937 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-06-20

    ... U.S. SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 6. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR...

  19. 76 FR 36953 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-06-23

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 7. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02...

  20. 76 FR 36952 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-06-23

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 5. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  1. 76 FR 29284 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-05-20

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  2. 76 FR 33394 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-06-08

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 4. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02...

  3. 76 FR 33807 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-06-09

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 3. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  4. 76 FR 35262 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-06-16

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 5. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02...

  5. 78 FR 13742 - Arkansas Disaster Number AR-00061

    Science.gov (United States)

    2013-02-28

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 13473 and 13474] Arkansas Disaster Number AR-00061 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of ARKANSAS...

  6. 76 FR 30226 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-05-24

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 3. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02...

  7. 76 FR 35262 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-06-16

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 4. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  8. 76 FR 36954 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-06-23

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 6. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  9. 76 FR 41553 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-07-14

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 7. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  10. 76 FR 28842 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-05-18

    ... SMALL BUSINESS ADMINISTRATION Disaster Declaration 12560 and 12561 Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 2. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), 05/02/2011...

  11. 76 FR 30227 - Arkansas Disaster Number AR-00049

    Science.gov (United States)

    2011-05-24

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12562 and 12563] Arkansas Disaster Number AR-00049 AGENCY: U.S. Small Business Administration. ACTION: Amendment 2. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for Public Assistance Only for the State of Arkansas...

  12. 76 FR 28843 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-05-18

    ... SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR), dated 05/02...

  13. 76 FR 38717 - Arkansas Disaster Number AR-00048

    Science.gov (United States)

    2011-07-01

    ... U.S. SMALL BUSINESS ADMINISTRATION [Disaster Declaration 12560 and 12561] Arkansas Disaster Number AR-00048 AGENCY: U.S. Small Business Administration. ACTION: Amendment 8. SUMMARY: This is an amendment of the Presidential declaration of a major disaster for the State of Arkansas (FEMA-1975-DR...

  14. Nano-hardness estimation by means of Ar+ ion etching

    International Nuclear Information System (INIS)

    Bartali, R.; Micheli, V.; Gottardi, G.; Vaccari, A.; Safeen, M.K.; Laidani, N.

    2015-01-01

    When the coatings are in nano-scale, the mechanical properties cannot be easily estimated by means of the conventional methods due to: tip shape, instrument resolution, roughness, and substrate effect. In this paper, we proposed a semi-empirical method to evaluate the mechanical properties of thin films based on the sputtering rate induced by bombardment of Ar + ion. The Ar + ion bombardment was induced by ion gun implemented in Auger electron spectroscopy (AES). This procedure has been applied on a series of coatings with different structure (carbon films) and a series of coating with a different density (ZnO thin films). The coatings were deposited on Silicon substrates by RF sputtering plasma. The results show that, as predicted by Insepov et al., there is a correlation between hardness and sputtering rate. Using reference materials and a simple power law equation the estimation of the nano-hardness using an Ar + beam is possible. - Highlights: • ZnO film and Carbon films were grown on silicon using PVD. • The growth temperature was room temperature. • The hardness of the coatings was estimated by means of nanoindentation. • Evaluation of resistance of materials to the mechanical damage induced by an Ar + ion gun (AES). • The hardness have been studied and a power law with the erosion rate has been found

  15. Pulsed electric field (PEF)research at USDA, ARS, ERRC

    Science.gov (United States)

    This article summarizes the effects of pulsed electric fields on the microbiological safety and quality aspects of various liquid food matrices, obtained at USDA, ARS, Eastern Regional Research Center under CRIS Project No. 1935-41420-013-00D, Processing Intervention Technologies for Enhancing the S...

  16. Fragmentations of 40Ar at 213 MeV/nucleon

    International Nuclear Information System (INIS)

    Viyogi, Y.P.; Symons, T.J.M.; Doll, P.; Greiner, D.E.; Heckman, H.H.; Hendrie, D.L.; Lindstrom, P.J.; Mahoney, J.; Scott, D.K.; Van Bibber, K.; Westfall, G.D.; Wieman, H.; Crawford, H.J.; McParland, C.; Gelbke, C.K.

    1979-01-01

    Energy and isotope distributions were measured for peripheral reactions induced by 40 Ar at 213 MeV/nucleon. The data are consistent with the predictions of abrasion-ablation models. The influence of correlations in the nuclear ground state is discussed

  17. Modification of van La ar activity coefficient model

    International Nuclear Information System (INIS)

    Vakili-Nezhaad, G. R.; Modarress, H.; Mansoori, G. A.

    2001-01-01

    Based on statistical and mechanical arguments, the original van La ar activity coefficient model has been improved by reasonable assumptions. This modifications has been done by replacing the van der Waals equation of state with the Redlich-K wong equation of state in the formulation of van La ar with consistent mixing rules for the energy and volume parameters of this equation of state (a mix , b mix ). Other equations of state, such as the Soave modification of the Redlich-K wong equation of state, P eng-Robinson and Mohsen-Nia, Modarress and Mansoori equations of state, have been introduced in the formulation of van La ar for the activity coefficients of the components present in the binary liquid mixtures, and their effects on the accuracy of the resultant activity coefficient models have been examined. The results of these revised models have been compared with the experimental data and it was found that the Redlich-K wong equation of state with the van der Waals mixing rules for the volume and energy parameters of this equation, is the best choice among these equations of state. In addition, it can improve the original van La ar activity coefficient model and, therefore a better agreement with the experimental data is obtained

  18. 244-AR vault cooling water stream-specific report

    International Nuclear Information System (INIS)

    1990-08-01

    The proposed wastestream designation for the 244-AR Vault cooling water wastestream is that this stream is not a dangerous waste, pursuant to the Washington (State) Administration Code (WAC) 173-303, Dangerous Waste Regulations. A combination of process knowledge and sampling data was used to make this determination. 21 refs., 6 figs., 7 tabs

  19. Data management and database structure at the ARS Culture Collection

    Science.gov (United States)

    The organization and management of collection data for the 96,000 strains held in the ARS Culture Collection has been an ongoing process. Originally, the records for the four separate collections were maintained by individual curators in notebooks and/or card files and subsequently on the National C...

  20. Ars Fennica - isikliku ja poliitilise vahel / Janar Ala

    Index Scriptorium Estoniae

    Ala, Janar, 1979-

    2009-01-01

    2008. aasta Ars Fennica kunstiauhinna kandidaatide tööde näitus Kumu Kunstimuuseumis kuni 26. aprillini. Läti kunstniku Katrina Neiburga, soomlaste Seppo Renvalli, Maria Dunckeri ja Tea Mäkipää ning Mark Raidpere näitusel eksponeeritud töödest

  1. Big data computing: Building a vision for ARS information management

    Science.gov (United States)

    Improvements are needed within the ARS to increase scientific capacity and keep pace with new developments in computer technologies that support data acquisition and analysis. Enhancements in computing power and IT infrastructure are needed to provide scientists better access to high performance com...

  2. Immune epitope database analysis resource (IEDB-AR)

    DEFF Research Database (Denmark)

    Zhang, Qing; Wang, Peng; Kim, Yohan

    2008-01-01

    We present a new release of the immune epitope database analysis resource (IEDB-AR, http://tools.immuneepitope.org), a repository of web-based tools for the prediction and analysis of immune epitopes. New functionalities have been added to most of the previously implemented tools, and a total...

  3. Microarea dating of mineral and rock. The application of technique by combining 40Ar/39Ar mass spectrometer with laser probe

    International Nuclear Information System (INIS)

    Hu Shiling; Dai Tongmo; Pu Zhiping

    1998-01-01

    The 40 Ar/ 39 Ar dating of probe technique by the continuous laser is successfully applied to determine the ages of microarea samples for mineral and whole rock, including the standard samples from internal and abroad, volcanical rock from westsouthern Antarctica and Green Pissolites of Guizhou. Isochron ages for volcanical rock to be excess or lost argon are accomplished by the whole fused, and for 'green Pisolites' not only by the whole fused, but also by the steps heat. All of which shows the significant geological ages. It would be exhibited the obvious advantage for dating some special samples to make the microarea 40 Ar/ 39 Ar dating technique by laser probe as compare with conventional K-Ar and 40 Ar/ 39 Ar methods

  4. Behaviour of AR glass fibre for building structural applications

    Directory of Open Access Journals (Sweden)

    Miravete, A.

    2005-12-01

    Full Text Available The AR glass reinforcement fibres were designed to resist the alkalis from the concrete. This is the main reason for its utilisation as a short-fibre-reinforcement of mortar and concrete for the last decades. Originally, the AR glass fibre sizing was not compatible with synthetic resins, so that this type of reinforcement was applied exclusively to mortar and concrete matrices. Recently, due to the developments of sizing, which are compatible with synthetic resins, the AR- glass fibres may be used as reinforcement of organic matrix composite materials, broadening the range of structural applications. The mechanical properties of AR glass fibre and organic matrix composite materials will be studied in this paper. First, the behaviour of this material under stress corrosion will be analysed. Their mass loss will be compared to E, C, and boron free glass fibres. Second, an experimental study dealing with 3P test bending and short beam ofAR glass fibre/polyester will de described with the goal of obtaining their Young modulus and tensile and interlaminar shear strengths. Finally, these experimental results will be compared to E glass fibre/polyester and several conclusions about their structural applications will be drawn.

    El vidrio AR y su presentación en forma de fibras de refuerzo, fue diseñado para ser inerte a los álcalis de los cementos. Por este motivo se viene utilizando desde hace varias décadas como refuerzo de morteros y hormigones en forma de fibra corta. El ensimaje que estas fibras de vidrio de refuerzo A R presentaba en su origen no era compatible con resinas de tipo sintéticas, por lo que el refuerzo era exclusivo para cementos y hormigones fuera cual fuera la aplicación, formato o proceso productivo. Recientemente, gracias al desarrollo específico de ensimajes especiales acordes a las fibras de vidrio AR ha aparecido la misma tipología de vidrio AR como refuerzo en forma de fibra continua compatible con resinas sint

  5. 40Ar/39Ar ages (600-570 Ma of the Serra do Azeite transtensional shear zone: evidence for syncontractional extension in the Cajati area, southern Ribeira belt

    Directory of Open Access Journals (Sweden)

    Rômulo Machado

    2007-12-01

    Full Text Available This paper presents 40Ar/39Ar ages of the rocks from the Serra do Azeite transtensional shear zone in the southern part of the Ribeira belt, between the States of São Paulo and Paraná, and also discusses the regional correlations and the tectonic implications for other parts of the belt. The geochronological data suggest that transtensional deformation was active between 600 and 580 Ma (hornblende and muscovite apparent ages, respectively. This time span is considerably older than previous proposals for the period of activity of these structures (520-480 Ma in the northern segment of this belt and in the Araçuaí belt. Kinematic analysis of the dated mylonites shows extensional structures with top-down movement to ESE compatible with structures found in other tectonic segments in the eastern portion of the Quadrilátero Ferrífero and in the Rio Doce Valley region. Our ages are situated in the same time interval defined for the alkaline magmatism of the Serra do Mar suite. We suggest that the regional tectonic framework was developed during continental-scale extension. This process has been coeval with convergent strain in the adjacent Neoproterozoic shear zones of the Apiaí/Ribeira and Araçuaí belts, which make up significant segments of these belts. The available data show that these structures may not be simply related to post-orogenic gravitational collapse, but must involve a more complex process probably related to dynamic balance between crustal thickening and thinning during tectonic convergence, basin formation and exhumation processes.Este trabalho apresenta idades 40Ar/39Ar de rochas da Zona de Cisalhamento Transtrativa Sinistral da Serra do Azeite, situada na parte sul do cinturão Ribeira, entre os Estados de São Paulo e Paraná, bem como discute a correlação regional e as implicações tectônicas com outras partes do cinturão. Os dados geocronológicos sugerem que a deformação extensional foi ativa entre 600 e 580 Ma

  6. Precision angle-resolved autoionization resonances in Ar and Ne

    Energy Technology Data Exchange (ETDEWEB)

    Berrah, N.; Langer, B.; Gorczyca, T.W. [Western Michigan Univ., Kalamazoo, MI (United States)] [and others

    1997-04-01

    Theoretical work has shown that the electron angular distribution and the shape of the autoionization resonances are crucial to the understanding of certain types of electron-electron correlation. Autoionization resonances in Ne (Ar) result from the decay of the excited discrete state Ne{sup *} 2s2p{sup 6} np (Ar{sup *} 3s3p{sup 6} np) into the continuum state Ne{sup +} 2s{sup 2}2p{sup 5} + e{sup {minus}} (ks,kd) (Ar{sup +} 3s{sup 2}3p{sup 5} + e{sup {minus}} (ks,kd)). Since the continuum can also be reached by direct photoionization, both paths add coherently, giving rise to interferences that produce the characteristic Beutler-Fano line shape. In this work, the authors report on quantitative angle-resolved electron spectrometry studies of (a) the Ne 2s{sup 2}2p{sup 6} {r_arrow} 2s2p{sup 6} np (n=3-5) autoionizing resonances and the 2s{sup 2}2p{sup 6} {r_arrow} 2p{sup 4}3s3p doubly excited resonance, (b) the Ar 3s{sup 2}3p{sup 6} {r_arrow} 3s3p{sup 6} np (n=4-9) autoionization resonances and extended R-matrix calculations of the angular-distribution parameters for both Ne and Ar measurements. Their results are compared with previous theoretical work by Taylor.

  7. The AR Sandbox: Augmented Reality in Geoscience Education

    Science.gov (United States)

    Kreylos, O.; Kellogg, L. H.; Reed, S.; Hsi, S.; Yikilmaz, M. B.; Schladow, G.; Segale, H.; Chan, L.

    2016-12-01

    The AR Sandbox is a combination of a physical box full of sand, a 3D (depth) camera such as a Microsoft Kinect, a data projector, and a computer running open-source software, creating a responsive and interactive system to teach geoscience concepts in formal or informal contexts. As one or more users shape the sand surface to create planes, hills, or valleys, the 3D camera scans the surface in real-time, the software creates a dynamic topographic map including elevation color maps and contour lines, and the projector projects that map back onto the sand surface such that real and projected features match exactly. In addition, users can add virtual water to the sandbox, which realistically flows over the real surface driven by a real-time fluid flow simulation. The AR Sandbox can teach basic geographic and hydrologic skills and concepts such as reading topographic maps, interpreting contour lines, formation of watersheds, flooding, or surface wave propagation in a hands-on and explorative manner. AR Sandbox installations in more than 150 institutions have shown high audience engagement and long dwell times of often 20 minutes and more. In a more formal context, the AR Sandbox can be used in field trip preparation, and can teach advanced geoscience skills such as extrapolating 3D sub-surface shapes from surface expression, via advanced software features such as the ability to load digital models of real landscapes and guiding users towards recreating them in the sandbox. Blueprints, installation instructions, and the open-source AR Sandbox software package are available at http://arsandbox.org .

  8. Tamanho ao nascer e problemas de saúde mental aos 11 anos em uma coorte brasileira de nascimentos

    Directory of Open Access Journals (Sweden)

    Erika Alejandra Giraldo Gallo

    2011-08-01

    Full Text Available O objetivo foi avaliar a associação entre tamanho ao nascer e problemas de saúde mental aos 11 anos na Coorte de Nascimentos de Pelotas, Rio Grande do Sul, Brasil, de 1993. Foram pesados e medidos ao nascer 4.358 recém-nascidos. Avaliou-se problemas de saúde mental com o questionário de capacidades e dificuldades (Strengths and Difficulties Questionnaire - SDQ. A prevalência de problemas de saúde mental foi de 32% (IC95%: 31-33. Na análise ajustada, os 291 (6,7% recém-nascidos com escorez de peso/idade e os 268 (6,2% com índice de massa corporal (IMC/idade +2 DP tiveram, respectivamente, 34% (IC95%: 6-71 e 19% (IC95%: 1-40 maior risco de apresentar esses problemas se comparados com aqueles com escore normal. Os resultados sugerem que fatores ocorridos na gestação e refletidos nas medidas de tamanho ao nascer podem ocasionar problemas de saúde mental em etapas tardias.

  9. Compactação ruminal e obstrução intestinal em bovinos, associadas ao consumo de Agave sisalana Perrine (Agavaceae

    Directory of Open Access Journals (Sweden)

    Eduardo M. Nascimento

    Full Text Available Resumo: A compactação dos pré-estômagos é um transtorno digestivo resultante da ingestão de forragem de baixa qualidade, rico em lignina e com baixos níveis de energia e proteína digerível, associada ou não a restrição hídrica. O acúmulo de vegetais ricos em fibras indigeríveis pode levar também a formação de fitobezoares, causando transtornos digestivos e obstruções intestinais. Objetivou-se com este trabalho descrever os aspectos epidemiológicos e as alterações clínico-patológicas de um surto de alterações digestórias em bovinos alimentados com Agave sisalana. O rebanho acometido era formado por 22 animais adultos, criados de forma semiextensiva, que, devido a escassez de forragem, receberam no cocho, quase que exclusivamente, durante dois meses, o caule do A. sisalana cortado manualmente. Seis vacas apresentaram diminuição do apetite, distensão abdominal, redução dos períodos de ruminação e da produção de fezes. Um animal foi encaminhado ao Hospital Veterinário da Universidade Federal de Campina Grande. O diagnóstico presuntivo de compactação ruminal e obstrução intestinal foi dado pela epidemiologia, sinais clínicos e análise de fluido ruminal. Na necropsia observou-se rúmen, retículo e omaso repletos, com conteúdo fibroso e ressecado constituído por fibras de A. sisalana. No abomaso observou-se a presença de conteúdo pastoso e esverdeado a acastanhado. Em todos os pré-estômagos e no abomaso havia fitobezoares, que mediam entre 4 e 12 cm de diâmetro. No duodeno um fitobezoar obstruía parcialmente a luz do órgão, com a porção anterior repleta de conteúdo e a posterior vazia. Conclui-se que a alimentação com caules de A. sisalana por longos períodos causa compactação de pre-estômagos e formação de fitobezoares.

  10. Ar-Ar Ages of Nakhlites Y000593, NWA998, and Nakhla and CRE Age of NWA998.

    Science.gov (United States)

    Garrison, D. H.; Bogard, D. D.

    2006-01-01

    The seven known Martian nakhlites are Nakhla, Lafayette, Governador Valadares, and four recent finds from hot and cold deserts: MIL03346 from the Transantarctic Mountains, a paired group from the Yamato Mountains (Y000593, Y000749, and Y000802; 1), and two from Morocco (NWA998 and NWA817; 2). Radiometric ages (Sm-Nd, Rb-Sr, U-Pb, and Ar-Ar) for the first three nakhlites, along with Chassigny, fall in the range of 1.19-1.37 Gyr and may suggest a common formation age (e.g., 3). These meteorites also show very similar cosmic-ray (space) exposure ages, which suggests a single ejection event from Mars (3). The ages for nakhlites are different from those of Martian shergottites, whose radiometric ages vary by nearly a factor of three (approximately 165-475 Myr) and whose space exposure ages vary over a factor of approximately 20 (3). Shergottite ages suggest that multiple locations on the Martian surface have been sampled, whereas nakhlite data imply that only one Mars surface location has been sampled. Because older Martian surfaces are expected to be more abundant, it seems surprising that all nakhlites would represent only one Martian impact event. To address this issue, we are measuring the Ar-39-Ar-40 ages of Y-000593, NWA-998, Nakhla, and MIL-03346, and the space (CRE) exposure age of NWA998.

  11. Ar-Ar Ages of Nakhlites Y000593, NWA998, and Nakhla and CRE Ages of NWA998

    Science.gov (United States)

    Garrison, D. H.; Bogard, D. D.

    2005-01-01

    The seven known Martian nakhlites are Nakhla, Lafayette, Governador Valadares, and four recent finds from hot and cold deserts: MIL03346 from the Transantarctic Mountains, a paired group from the Yamato Mountains (Y000593, Y000749, and Y000802, and two from Morocco (NWA998 and NWA817. Radiometric ages (Sm-Nd, Rb-Sr, U-Pb, and Ar-Ar) for the first three nakhlites, along with Chassigny, fall in the range of 1.19-1.37 Gyr and may suggest a common formation age. These meteorites also show very similar cosmic-ray (space) exposure ages, suggesting a single ejection event from Mars. The ages for nakhlites are different from those of Martian shergottites, whose radiometric ages vary by nearly a factor of three (approx. 165-475 Myr) and whose space exposure ages vary over a factor of approx. 20. Shergottite ages suggest that multiple locations on the Martian surface have been sampled, whereas nakhlite data imply sampling of only one Mars surface location. Because older Martian surfaces are expected to be more abundant, it seems surprising that all nakhlites would represent only one Martian impact event. To address this issue, we are measuring the (39)Ar-(40)Ar ages of Y-000593, NWA-998, Nakhla, and MIL-03346, and the space (CRE) exposure age of NWA998. Additional information is included in the original extended abstract.

  12. 40Ar/39Ar incremental-release ages of biotite from a progressively remetamorphosed Archean basement terrane in southwestern Labrador

    International Nuclear Information System (INIS)

    Dallmeyer, R.D.

    1982-01-01

    Gneisses within Archean basement terrane adjacent to the southwestern portion of the Labrador Trough were variably retrograded during a regional metamorphism of Grenville age (ca. 1000 Ma). Bioties from non-retrograded segments of the gneiss terrane record 40 Ar/ 39 Ar plateau and isochron ages which date times of cooling following an episode of the Kenoran orogeny (2376-2391 Ma). A suite of gneiss samples displaying varying degrees of retrograde alteration was collected across the Grenville metamorphic gradient. Bioties in these samples show no petrographic evidence of retrograde alteration, however they do record internally discordant 40 Ar/ 39 Ar age spectra. Although the extent of internal discordance is variable, the overall character of the release patterns is similar with younger apparent ages recorded in intermediate-temperature gas fractions. The total-gas dates range from 2257+-27 Ma (northwest) to 1751+-23 Ma (southeast), suggesting that variable quantities of radiogenic argon were lost from the Archean biotites during Grenville metamorphism. The 'saddle-shaped' nature of the discordant spectra indicates that argon loss was not accomplished through single-stage, volume diffusion processes. (orig./ME)

  13. Geochemistry and 40Ar/39Ar age of Early Carboniferous dolerite sills in the southern Baltic Sea

    Directory of Open Access Journals (Sweden)

    Gediminas Motuza

    2015-08-01

    Full Text Available The Early Carboniferous magmatic event in the southern Baltic Sea is manifested by dolerite intrusions. The presumable area in which the dolerite intrusions occur ranges from 30 to 60 km in east–west direction, and is about 100 km in north–south direction. The dolerites were sampled in well D1-1 and investigated by applying chemical analysis and 40Ar/39Ar step-heating dating. Dolerites are classified as alkali and sodic, characterized by high TiO2 (3.92, 3.99 wt% and P2O5 (1.67, 1.77 wt% and low MgO (4.89, 4.91 wt% concentrations, enriched in light rare earth elements, originated from an enriched mantle magma source and emplaced in a continental rift tectonic setting. The 351 ± 11 Ma 40Ar/39Ar plateau age for groundmass plagioclase indicates a considerable age gap with the 310–250 Ma magmatism in southern Scandinavia and northern Germany. The magmatic rocks in the Baltic Sedimentary Basin are coeval with alkaline intrusions of NE Poland. Both magmatic provinces lie in the northwestward prolongation of the Pripyat–Dnieper–Donetsk Rift (370–359 Ma and may constitute a later phase of magmatic activity of this propagating rift system.

  14. Levels in 45K and 46K excited by the β decay of 45Ar and 46Ar

    International Nuclear Information System (INIS)

    Huck, A.; Klotz, G.; Knipper, A.; Miehe, C.; Walter, G.

    1979-01-01

    The nuclides 45 Ar and 46 Ar have been produced by spallation reactions on vanadium targets at Esub(p)=600MeV. The subsequent decays to 45 K and 46 K states have been studied. An intensity of 98.6+-0.6% was measured for the β transition of the 1.94MeV state in 46 K. A decay scheme involving 13 β branches has been established for 45 Ar, and the corresponding log values have been deduced. Eleven states are reported for the first time in the decay scheme of 45 Ar 1.42, 1.47, 1.72, 2.52, 2.57, 2.75, 3.31, 3.99, 4.04, 4.36 and 4.57MeV. From the lifetime, tau=4.6+-0.6ns, deduced from γ-γ delayed coincidences, the angular momentum of the 1081keV level has been established as (7/2) - on the basis of the transition strength of its γ decay. A survey on the 1fsub(7/2)→1dsub(3/2)M2 transition in odd K nuclei is presented and the observed hindrance factors are discussed

  15. Ionization of 0.5 MeV H by Ar and a comparison with the H-/Ar system

    International Nuclear Information System (INIS)

    Duncan, M.M.; Menendez, M.G.

    1979-01-01

    Doubly differential cross sections (DDCS) and the complete angular distributions of electrons released in projectile ionization of H and H - by Ar are compared. These experimental cross sections are also compared to calculations using an elastic scattering model. The angular dependence of the shapes and the peak energies of the DDCS are shown for both systems

  16. REFLEXOS DA RECEPÇÃO NO TEXTO LITERÁRIO LATINO – A PARTIR DA ARS POETICA DE HORÁCIO –

    Directory of Open Access Journals (Sweden)

    Francisco Edi de Oliveira Sousa

    2016-01-01

    Full Text Available Este trabalho revisita a literatura latina, lançandolhe um olhar pautado em recente tendência dos estudos literários: a interação texto-receptor. As teorias e métodos que desenvolvem tal tendência convergem ao horizonte de uma poética da leitura. Nesta linha, destacam-se a estética da recepção e a teoria do efeito estético: a primeira corrente analisa a recepção histórica de obras literárias e efeitos estéticos que elas produzem nos receptores; a segunda parte destes princípios, todavia volta-se mais para o texto, permitindo examinar nas obras procedimentos artísticos orientados para a interação com o receptor. Ancorados nestas abordagens, comentamos a recepção de obras literárias no universo romano do início do Império e procedimentos artísticos condicionados por esta interação. Ao fim, as reflexões tecidas encontram respaldo na Ars poetica de Horácio. Palavras-chave: Literatura latina; Ars poetica de Horácio; poética da leitura.

  17. I-Xe and 40Ar-39Ar dating of silicate from Weekeroo Station and Netschaevo IIE iron meteorites

    International Nuclear Information System (INIS)

    Niemeyer, S.

    1980-01-01

    Silicate inclusions from two IIE iron meteorites were dated by the I-Xe and 40 Ar- 39 Ar techniques. Weekeroo Station, a 'normal' IIE iron, shows no loss of radiogenic 40 Ar at low temperature, and the well defined 40 Ar- 39 Ar plateau yields an age of 4.54 +- 0.03 Byr. The xenon data define a good I-Xe correlation with an age of + 10.9 +- 0.5 Myr relative to Bjurbole. Despite its relatively young age, Weekeroo Station's ( 129 Xe/ 132 Xe)sub(trapped) ratio (= 0.84 +- 0.05) lies significantly below the solar value. Netschaevo silicate has a chondritic composition, unlike 'normal' IIE silicate which is more differentiated. Nevertheless Netschaevo gives a 40 Ar- 39 Ar plateau-age of only 3.79 +- 0.03 Byr, with the xenon data failing to define an I-Xe isochron. Only irons from the IAB and IIE groups contain silicate inclusions, but these two groups differ in many other respects, mostly suggesting that IAB meteorites are more primitive. The I-Xe chronology supports this suggestion inasmuch as Weekeroo Station formed well after IAB silicates. The four silicate-bearing IIE irons which have now been dated can be subdivided into distinct pairs: Weekeroo Station and Colomera formed near the beginning of the solar system, while Netschaevo and Kodaikanal both formed only 3.8 Byr ago. A review of other properties of these meteorites generally supports this subdivision. This work underscores the complexity of the history of IIE meteorites; in particular, an adequate model must account for the formation of two IIE irons at 3.8 Byr without disturbing rare gases in Weekeroo Station. All formation models are quite speculative, but the one which seems best to fit the available evidence postulates two parent bodies: the 3.8 Byr old silicate formed on one parent body, all other IIE material resided in a separate body, and subsequent collision(s) mixed the young silicate with IIE metal. (author)

  18. 40Ar/39Ar dates in the Central Cordillera of Colombia: Evidence for an upper triassic regional tecnomagmatic event

    International Nuclear Information System (INIS)

    Vinasco, C.J.; Cordani, U.G.; Vasconcelos, P

    2001-01-01

    The Coastal, Western, Central and the Eastern Cordilleras constitute four independent mountain ranges in the Northern Andes. The Coastal and Western Cordillera comprises allochthonous oceanic sequences of basic volcanic rocks and marine sediments of Cenozoic and Upper Cretaceous age (Aspden et al., 1987). The so-called Central Cordillera Polymetamorphic Complex (Restrepo and Toussaint, 1982), made up the pre-Mesozoic Central Cordillera basement, consists of low through high-grade metamorphic rocks intruded by Meso-Cenozoic batholiths. The Eastern Cordillera is a polydeformed continental mountain range consisting of Precambrian and Paleozoic metamorphic and igneous rocks overlain by Paleozoic to Mesozoic sedimentary covers. The northern part of the Central Cordillera has been described as a suspect terrain affected by several tectonometamorphic episodes. The most important of them have been always considered those related to the Hercynian orogeny, in Devonian and Carboniferous times, and those occurring at the beginning of the Andean Cycle in the Cretaceous (Restrepo and Toussaint, 1982). A possible Lower Paleozoic and even Precambrian age for the basement of the terrain has also been proposed. Although some indications of a Permo-Triassic event are already available, this period was not considered as of great importance for the geologic evolution of the region. The available radiometric dates in the 200-250 Ma interval, for the Central Cordillera, are as follows: 1. One K-Ar whole rock age for a Granulite of 251±21 Ma. (Restrepo et al, 1991) of the El Retiro group SE of Medellin. However, a K-Ar biotite age of 110±10 Ma. (Toussaint et al., 1978) was obtained for a migmatite rock associated with the same group. 2. A Sm/Nd garnet and whole rock age of 226±17 Ma in rocks associated to granulites, SE of Medellin, interpreted as metamorphic ages (Correa and Martins, 2001). 3. K-Ar biotite dates for the Puqui metamorphic complex, occurring north of Medellin, ranging

  19. Holocene Evolution of Qing'ao Embayment, Southern China

    Science.gov (United States)

    Switzer, A. D.; Yu, F.; Chen, B.; Zheng, Z.; Wang, D.

    2012-12-01

    The Holocene evolution of the Qing'ao embayment, Nan'ao Island, southern China, is primarily the result of the interaction of tectonic activity, climate variation and changes in relative sea level. Characterizing the evolutionary history of the relatively small Qing'ao embayment during the Holocene will help improve our understanding of the driving mechanisms of coastal evolution in the area. To reconstruct the Holocene evolution history we analyzed the grain size, loss on ignition (LOI) and carbonate content of modern and core samples. Modern environmental analogs were examined in surface samples ranging from the coastal sand dunes through to offshore. The results of these modern samples suggest that dune sand (mean size of ~2.33Phi) are slightly finer than beach sand (mean size of 2.13Phi), and nearshore sediment is much coarser than offshore sediment (mean size of 5.90Phi). This modern analogs were then applied to 8 percussion cores from the Qing'ao embayment. A chronological framework obtained from 11 radiocarbon samples suggests that the embayment started to accept deposition since early Holocene, ~8500 cal. yr. BP. Three main phases of Holocene evolution were identified. A basin wide shell-rich sand sheet forms the basal Holocene facies and overlies clay rich presumably Pleistocene sediments or bedrock. This facies records an initial sedimentation phase associated with the early Holocene transgression into the embayment (~8500-6000 cal. yr. BP). The basal facies grades upward to a mixed sandy-mud facies which includes lagoonal clayey-silts, flood tide delta sands and records an estuarine phase lasting from ~6000-1000 cal. yr. BP that appears coincident with falling regional sea levels. Coincident with the estuarine phase is a period of coastal dune building recorded as yet undated massive sands that are found in the upper fill. Toward the end of the estuarine phase it is apparent that dune migration has restricted the lagoon entrance and that this was

  20. Welding of CuZr-based metallic glasses on air; Soldagem ao ar de ligas vitreas baseadas em Cu e Zr

    Energy Technology Data Exchange (ETDEWEB)

    Batalha, W.; Gargarella, P.; Kiminami, C.S., E-mail: wbatalha@dema.ufscar.br [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil). Departamento de Engenharia de Materiais

    2016-07-01

    Metallic glass alloys have been studied aiming at its exceptional mechanical properties. This alloys processing's requires high cooling rates, which diminishes the sample's size. There by welding these samples without the loss of amorphous structure is a good alternative. The DEMa group has developed a technique based on Joule effect heating. By applying pressure and electric current, reaching temperatures of super cold liquids (the temperature between crystallizing and vitric transition), the vitric metal has it’s viscosity reduced and sample binding occur. The objective of this paper was to weld samples of cylindrical geometry of 2 and 3 mm in diameter and 4 mm in length of the compositions Cu46Zr42Al7Y5 and (Cu47Zr45Al8)98Y2. The process was done using 2 copper electrodes under(over) argon flux. The samples were later analysed by microscopy, differential scanning calorimetry and X ray diffraction. The results showed that this kind of welding process is possible since crystal formation on the welding region did not occur and there were no faults like cracks or porosity. (author)

  1. The immunohistochemical expression and potential prognostic value of HDAC6 and AR in invasive breast cancer.

    Science.gov (United States)

    Li, Congying; Cao, Lu; Xu, Cong; Liu, Fang; Xiang, Guomin; Liu, Xiaozhen; Jiao, Jiao; Niu, Yun

    2018-05-01

    Previous studies have investigated the role of histone deacetylase 6 (HDAC6) in the regulation of androgen receptor (AR) in prostate cancer; however, the role of HDAC6 has not yet been clearly identified in breast cancer. The aim of this study was to examine the expression of HDAC6 and AR, determine the correlation between HDAC6 and AR, and assess the prognostic value of HDAC6 and AR in breast cancer. A total of 228 cases of invasive breast cancer were randomly selected. The expression of HDAC6 and AR was analyzed by immunohistochemistry. χ 2 Tests were performed to determine the association between conventional clinicopathological factors and HDAC6, AR, and HDAC6/AR co-expression. Spearman correlation methods were performed to determine the correlation between HDAC6 and AR, and Kaplan-Meier analyses were performed to determine the prognostic impact of HDAC6, AR and HDAC6/AR co-expression; 58.8% (134/228) patients exhibited high expression of HDAC6. High HDAC6 expression was significantly associated with high histologic grade (G3) (PAR expression levels were significantly associated (r=0.382, PAR+ groups (PAR and HDAC6 and HDAC6/AR co-expression had a worse clinical prognosis. The expression levels of HDAC6 and AR are correlated in breast cancer; moreover, HDAC6 and AR have prognostic value in predicting the overall survival (OS) of ER-negative breast cancer patients. Copyright © 2017 Elsevier Inc. All rights reserved.

  2. Qualidade da carne de frangos de corte submetidos a dietas suplementadas com crômio, criados em diferentes temperaturas ambientais - DOI: 10.4025/actascianimsci.v29i2.218 Meat quality of broiler chicks submeted the supplemented diets with chromium and reared in differents enviromental temperatures - DOI: 10.4025/actascianimsci.v29i2.218

    Directory of Open Access Journals (Sweden)

    Nívea Maria Brancaci Zeoula

    2007-11-01

    Full Text Available Foram realizados dois experimentos. O experimento um objetivou avaliar a composição da carne do peito de frangos alimentados com dietas suplementadas com crômio (0, 400, 800 e 1.200 μg Cr kg-1 complexado a levedura, criados sob diferentes condições de temperatura (quente, termoneutra e fria. O experimento dois objetivou avaliar a qualidade da carne do peito de frangos alimentados com dietas suplementadas com crômio (0 e 400 μg Cr kg-1, criados nas mesmas condições do experimento um e desossados em diferentes períodos (0, 5 e 24 horas. Os resultados mostram que as aves criadas em ambiente frio apresentaram a carne com menor porcentagem de matéria mineral e crômio e maior intensidade de vermelho, enquanto as aves criadas em temperatura termoneutra apresentaram carne com menor porcentagem de umidade, e as aves criadas em temperatura quente, carne com maior luminosidade. Já a suplementação de crômio não proporcionou qualquer efeito na composição e na qualidade de carne, enquanto que o aumento no período de desossa proporcionou um menor comprimento de sarcômero, força de cisalhamento e intensidade de amarelo, porém uma maior luminosidade.Two experiments were conducted being the objective of the first experiment to evaluate the the composition of breast meat of broiler chicks fed with diets supplemented with chromium yeast (0; 400; 800 and 1,200 μg Cr kg-1 reared in different environmental temperatures (hot, thermoneutral and cold. The second experiment aimed to evaluate the quality of breast meat of broiler chicks fed with diets supplemented with chromium yeast (0 and 400 μg Cr kg-1, reared in different environmental temperatures (hot, thermoneutral and cold and deboned in different periods (0, 5 and 24 hours. The results showed that birds reared in cold environmental temperature showed meat with lower mineral matter percentage and chromium and higher values of redness, whereas the birds reared in thermoneutral environment

  3. DA IDEAÇÃO AO ROADSHOW: UMA EXPERIÊNCIA PEDAGÓGICA INTERDISCIPLINAR

    Directory of Open Access Journals (Sweden)

    Sílvio Luiz de Paula

    2017-02-01

    Full Text Available O objetivo deste trabalho é descrever uma prática pedagógica, inserida no bojo das metodologias ativas, que leva em consideração a interdisciplinaridade, o desenvolvimento de competências e uma avaliação centrada no processo. Para tanto, ao buscar ampliar o entendimento sobre metodologias ativas e dar intelecção sobre as bases que deram suporte a experiência, no embasamento teórico discute-se sobre interdisciplinaridade, desenvolvimento de competências e avaliação de aprendizagem. Na metodologia, visando a alcançar o entendimento da prática realizada, além dos registros programados realizados pelos três professores envolvidos na condução da atividade, aplicaram-se questionários com os alunos durante o processo, realizando-se ao final um grupo focal. A prática, realizada no segundo semestre letivo de 2016, contou com a participação de aproximadamente 90 alunos dos cursos de Administração e Gestão da Informação da Universidade Federal de Pernambuco (UFPE que, por meio da modelagem Canvas, método utilizado na fase de ideação para a criação dos novos empreendimentos, desenvolveram sete empresas inovadoras e criativas, finalizando o semestre com a apresentação das empresas no formato de roadshow, forma de apresentação utilizada em ambiente de startup nas rodadas de negócios para captação de investimentos. Como principais achados identifica-se a importância de experiências interdisciplinares que conduzam os alunos a vivenciarem situações que possibilitem o desenvolvimento de competências para além dos conteúdos curriculares. Da perspectiva dos docentes envolvidos ressaltam-se os desafios na formação para a condução de tais práticas, bem como as dificuldades da estrutura e modelo pedagógico adotado na instituição.

  4. Intelligent vibration control of ELTs and large AO hardware

    Science.gov (United States)

    Pott, J.-U.; Kürster, M.; Trowitzsch, J.; Borelli, J.; Rohloff, R.-R.; Herbst, T.; Böhm, M.; Keck, A.; Ruppel, T.; Sawodny, O.

    2012-07-01

    MPIA leads the construction of the LINC-NIRVANA instrument, the MCAO-supported Fizeau imager for the LBT, serves as pathfinder for future ELT-AO imagers in terms of size and technology. In this contribution, we review recent results and significant progress made on the development of key items of our stratgey to achieve a piston stability of up to 100nm during a science exposure. We present an overview of our vibration control strategies for optical path and tip-tilt stabilization, involving accelerometer based real-time vibration measurements, vibration sensitive active control of actuators, and the development of a dynamical model of the LBT. MPIA also co-develops the E-ELT first-light NIR imager MICADO (both SCAO and MCAO assisted). Our experiences, made with LINC-NIRVANA, will be fed into the MICADO structural AO design to reach highest on-sky sensitivity.

  5. Magnetic MOF for AO7 Removal and Targeted Delivery

    Directory of Open Access Journals (Sweden)

    Xue-Qing Zhan

    2018-06-01

    Full Text Available Owing to their high surface area and porosity, metal-organic frameworks (MOFs have been gradually employed for a myriad of applications ranging from sensing, pollutant adsorption, and drug delivery to environmental remediation and catalysis. Magnetic nanoparticles-metal-organic frameworks (MMOFs hybrid materials can facilitate facile removal of MOFs from solutions. In this report, we report the synthesis of Fe3O4@UiO-66 by encapsulation and simulated the drug loading and release by studying the adsorption and release of AO7. Thus, we loaded these MMOFs with AO7 and found that they were able to trigger and control its release by simply applying an external magnetic field. The magnetic field heats the magnets in the MOF, which causes the load to burst from the framework.

  6. Mujer de 39 a??os con cefalea intensa

    OpenAIRE

    Santiago-D??az, Carlos; Zamora-Pasadas, M??nica; S??nchez-Bern??, Isabel; Jim??nez-Alonso, Juan

    2012-01-01

    Paciente de 39 a??os que acude a urgencias por presentar un cuadro de cefalea intensa, holocraneal, con foto y sonofobia intensas, acompa??ada de febr??cula. En la exploraci??n f??sica ??nicamente destacaban leves roncus en base de hemit??rax izquierdo. Las pruebas complementarias iniciales fueron normales. Tras un estudio exhaustivo y fundamentalmente una insistencia en la anamnesis por ??rganos y aparatos, finalmente se lleg?? al diagn??stico.

  7. Da esclerodermia ao síndrome de poems

    Directory of Open Access Journals (Sweden)

    Ana Sofia Montez

    2015-12-01

    Full Text Available Homem, 84 anos, com antecedentes de hipotiroidismo e alterações cutâneas recentes compatíveis com esclerodermia, confirmadas em biópsia cutânea, mas com estudo auto-imune negativo. Foi internado por queixas constitucionais. Ao exame objetivo, apresentava-se emagrecido, com lesões de vitiligo nas mãos além das de esclerodermia (figura 1 e distensão abdominal com ascite

  8. Da esclerodermia ao síndrome de poems

    OpenAIRE

    Ana Sofia Montez; Elsa Rocha

    2015-01-01

    Homem, 84 anos, com antecedentes de hipotiroidismo e alterações cutâneas recentes compatíveis com esclerodermia, confirmadas em biópsia cutânea, mas com estudo auto-imune negativo. Foi internado por queixas constitucionais. Ao exame objetivo, apresentava-se emagrecido, com lesões de vitiligo nas mãos além das de esclerodermia (figura 1) e distensão abdominal com ascite

  9. Reacções adversas aos antibacilares em doentes internados: Gravidade e factores de risco

    Directory of Open Access Journals (Sweden)

    Ana Sofia Vilariça

    2010-05-01

    édia do grupo de doentes com RA foi de 58,4 dias. Esta demora média apresentou diferenças estatisticamente significativas (p< 0,001 em relação à demora média dos doentes sem RA, que foi de 26 dias. Os fármacos mais implicados foram a isoniazida (62,2% e a rifampicina (51,9%. Dos 134 casos em que foi possível caracterizar a gravidade das RA, em 106 casos (79% houve necessidade de suspensão do fármaco. A relação causal fármaco-RA foi definitiva em 23 casos (17%. Dos 13 doentes (9,6% que faleceram, em 6 (4,4% a RA esteve directamente implicada na causa de morte.A ocorrência de qualquer RA foi associada ao alcoolismo (risco relativo [RR] de 3,0; 95% de intervalo confiança [IC], 1,1-7,9 e aos níveis de CD4 < 350 células/mm 3 ([RR] de 2,6; [IC], 1,4-5.No modelo preditivo, as reacções hepáticas foram associadas à ocorrência de hepatites virais B e/ou C ([RR] de 2,5; [IC], 1,2-5,1 e aos níveis de CD4 < 350 células/mm3 ([RR] de 5,5; [IC], 1,6-18,6.Conclusões: Os antibacilares estão associados a um número significativo de RA que podem condicionar grande morbilidade, prolongamento do internamento e mesmo alguma mortalidade. Os nossos resultados mostram que o alcoolismo e os níveis de CD4 <350 células/mm3 foram significativamente associados a um elevado risco de ocorrência de qualquer RA e que as hepatites B e C e os níveis de CD4 < 350 células/mm3 foram associados, também de forma significativa, ao risco de RA hepáticas.Rev Port Pneumol 2010; XVI (3: 431-451 Abstract: Introduction: Given Mycobacterium tuberculosis’s characteristics, the treatment of tuberculosis (TB infection is administered over a long period of time (for six months or more with a combination of several drugs which could cause adverse reactions (AR. These can cause significant morbidity and compromise tuberculosis treatment regimens.Aim: To determine the incidence and severity of and risk factors for major

  10. Reacções adversas aos antibacilares em doentes internados: Gravidade e factores de risco

    Directory of Open Access Journals (Sweden)

    Ana Sofia Vilariça

    2010-05-01

    média do grupo de doentes com RA foi de 58,4 dias. Esta demora média apresentou diferenças estatisticamente significativas (p < 0,001 em relação à demora média dos doentes sem RA, que foi de 26 dias. Os fármacos mais implicados foram a isoniazida (62,2% e a rifampicina (51,9%. Dos 134 casos em que foi possível caracterizar a gravidade das RA, em 106 casos (79% houve necessidade de suspensão do fármaco. A relação causal fármaco-RA foi definitiva em 23 casos (17%. Dos 13 doentes (9,6% que faleceram, em 6 (4,4% a RA esteve directamente implicada na causa de morte. A ocorrência de qualquer RA foi associada ao alcoolismo (risco relativo [RR] de 3,0; 95% de intervalo confiança [IC], 1,1–7,9 e aos níveis de CD4 < 350 células/ mm3 ([RR] de 2,6 ; [IC], 1,4–5. No modelo preditivo, as reacções hepáticas foram associadas à ocorrência de hepatites virais B e/ou C ([RR] de 2,5; [IC], 1,2–5,1 e aos níveis de CD4 < 350 células/mm3 ([RR] de 5,5; [IC], 1,6–18,6. Conclusões: Os antibacilares estão associados a um número significativo de RA que podem condicionar grande morbilidade, prolongamento do internamento e mesmo alguma mortalidade. Os nossos resultados mostram que o alcoolismo e os níveis de CD4 <350 células/mm3 foram significativamente associados a um elevado risco de ocorrência de qualquer RA e que as hepatites B e C e os níveis de CD4 < 350 células/mm3 foram associados, também de forma significativa, ao risco de RA hepáticas. Abstract: Introduction: Given Mycobacterium tuberculosis's characteristics, the treatment of tuberculosis (TB infection is administered over a long period of time (for six months or more with a combination of several drugs which could cause adverse reactions (AR. These can cause significant morbidity and compromise tuberculosis treatment regimens. Aim: To determine the incidence and severity of and risk factors for major

  11. Um crime delicado: conversando aos infinitos - "Um retrato de cavalo"

    Directory of Open Access Journals (Sweden)

    Cid Ottoni Bylaardt

    2010-12-01

    um cavalo e seu retrato, a partir dos sentimentos contraditórios de seu dono, que considera um crime aquele clique. Temos aí um retrato, imagem subtraída ilicitamente ao seu dono: escrita, representação. Temos também uma narrativa, escrita do retrato, representação da representação. Este artigo pretende mostrar como Guimarães Rosa manipula as ambiguidades da linguagem literária, levando-a além dos limites da representação, explorando seu fascínio, seu saber, que não é da ordem da compreensão. O cavalo e seu retrato fazem refletir sobre a literatura, sobre seu excesso de verdade que compõe sua mentira. Ao escrever o cavalo e seu retrato, o texto não consegue fixar nenhuma verdade, apenas imagens fugidias que compõem recapítulos: há sempre um escrito a se sobrepor a outro, sem determinar onde está o verdadeiro, onde está o que o nega, a remeter o olhar ao reino da fascinação, onde a imagem perde o valor de significação para se tornar pura paixão da indeterminação, da indiferença.

  12. AO Distal Radius Fracture Classification: Global Perspective on Observer Agreement

    Science.gov (United States)

    Jayakumar, Prakash; Teunis, Teun; Giménez, Beatriz Bravo; Verstreken, Frederik; Di Mascio, Livio; Jupiter, Jesse B.

    2016-01-01

    Background The primary objective of this study was to test interobserver reliability when classifying fractures by consensus by AO types and groups among a large international group of surgeons. Secondarily, we assessed the difference in inter- and intraobserver agreement of the AO classification in relation to geographical location, level of training, and subspecialty. Methods A randomized set of radiographic and computed tomographic images from a consecutive series of 96 distal radius fractures (DRFs), treated between October 2010 and April 2013, was classified using an electronic web-based portal by an invited group of participants on two occasions. Results Interobserver reliability was substantial when classifying AO type A fractures but fair and moderate for type B and C fractures, respectively. No difference was observed by location, except for an apparent difference between participants from India and Australia classifying type B fractures. No statistically significant associations were observed comparing interobserver agreement by level of training and no differences were shown comparing subspecialties. Intra-rater reproducibility was “substantial” for fracture types and “fair” for fracture groups with no difference accounting for location, training level, or specialty. Conclusion Improved definition of reliability and reproducibility of this classification may be achieved using large international groups of raters, empowering decision making on which system to utilize. Level of Evidence Level III PMID:28119795

  13. Barreiras ao tratamento da hipertensão arterial

    Directory of Open Access Journals (Sweden)

    Maria Vilani Cavalcante Guedes

    2011-12-01

    Full Text Available Objetivou-se descrever as barreiras encontradas pelas pessoas portadoras de hipertensão arterial para a não adesão ao tratamento e controle dos níveis de sua pressão arterial. Estudo descritivo e transversal realizado em seis unidades básicas de saúde em Fortaleza-Ceará, Brasil, com 246 pessoas inscritas no Programa de Controle de Hipertensão Arterial há, no mínimo, um ano. Coletaram-se dados com entrevista estruturada e no prontuário eletrônico. Identificaram-se 69 pesquisados com níveis pressóricos normalizados. As principais barreiras apontadas foram: baixas condições financeiras, tratamento contínuo com muitos remédios e prática de atividade física. Concluiu-se que as barreiras ao tratamento anti-hipertensivo compreendem a pessoa adoecida, seu ambiente de vida e acesso aos cuidados de saúde.

  14. Resistências aos Antibióticos em Pneumologia

    Directory of Open Access Journals (Sweden)

    J.G. Saraiva da Cunha

    1999-01-01

    Full Text Available RESUMO: A crescente resistência dos microrganismos aos agentes antimicrobianos tem motivado o interesse da comunidade científica com o objectivo de avaliar a dimensão do problema, perceber a sua origem e encontrar eveotuais soluções. São quatro os mecanismos basicos de resistência das bácterias aos antibióticos: inactivação enzimática, alteração ou excesso de produção das molécules alvo, diminuição da permeabilidade da parede celulalr e eliminação actia (eflauxo do antibiótico para o exterior da bactéria. Para cada uma das diferentes classes de antibioticos sio referidos os priocipais mecanismos de resisteocia, assim como se exemplifica quais os germes de particular relevância em pneumologia que maiores dificuldades terapêuticas actualmente colocam. Finalmente enumeram-se algumas medidas para contrariar a expansão do problema. Palavras-Chave: Resistências aos antibióticos, Pneumologia, Pneumococo

  15. O Primeiro Ano do Grupo de Apoio ao Primeiranista

    Directory of Open Access Journals (Sweden)

    Rodolfo Furlan Damiano

    Full Text Available Este trabalho é um relato de experiência do primeiro ano de funcionamento do Grupo de Apoio ao Primeiranista (GAP. O GAP é um grupo desenvolvido por alunos de Medicina de uma universidade privada do Estado de São Paulo, apoiado por sua direção, com o intuito de amparar e humanizar a recepção aos ingressantes. O início das atividades do GAP ocorreu em 2013 com base nos conceitos de tutoria/mentoring, aplicado por outras escolas médicas brasileiras. Nas reuniões semanais do GAP, os participantes (alunos do primeiro ano e mentores (acadêmicos veteranos e uma psicóloga institucional discutiam temas como resiliência, compaixão, humildade e respeito. Durante as reuniões, notou-se uma problemática extensa em relação ao trote universitário, referido pelos primeiranistas como o pior problema enfrentado na universidade. Na sequência dos encontros, o grupo direcionou suas ações para reduzir o trote na universidade. O GAP, apesar de estar em seu primeiro ano de funcionamento, mostrou ter eficácia relevante, podendo ser um modelo a ser implementado em outras universidades.

  16. Programação de entretenimento não ficcional na TV aberta brasileira: levantamento do ao vivo na TV Globo, TV Record e SBT

    Directory of Open Access Journals (Sweden)

    Julio Cesar Fernandes

    2017-06-01

    Full Text Available A TV aberta tem uma penetração muito grande no Brasil e, tradicionalmente, ainda é referência em produção televisiva. Os gêneros e formatos consagrados permanecem há décadas na grade nas emissoras, sem grandes modificações. O objetivo deste estudo é fazer um levantamento da programação de entretenimento não ficcional das três maiores redes nacionais abertas do País, em audiência: TV Globo, TV Record e SBT. Ao categorizar os conteúdos desses programas, é possível analisar a quantidade de produção feita, de fato, ao vivo e o impacto dessa linguagem na sobrevivência da mídia, principalmente em um momento em que se discute o futuro da TV tradicional por conta da disseminação de telas e o avanço da internet. Ao todo, mais de 120 horas de produção foram gravadas, decupadas e analisadas, para se traçar uma situação atual da TV aberta no País e seu futuro.DOI: http://dx.doi.org/10.21882/ruc.v5i8.679 Recebido em: 14/04/2017 Aceito em: 20/06/2017  

  17. (e, 2e) processes on Ne, Ar and Xe targets

    Energy Technology Data Exchange (ETDEWEB)

    Purohit, G; Patidar, Vinod; Sud, K K, E-mail: g_vpurohit@yahoo.co, E-mail: ghanshyam.purohit@spsu.ac.i [Department of Physics, School of Engineering, Sir Padampat Singhania University, Bhatewar, Udaipur-313 601 (India)

    2010-06-01

    Recently, there have been several attempts to explain the features of triple differential cross section (TDCS) for the (e, 2e) processes on inert targets Ne, Ar and Xe but there are still certain discrepancies in theoretical results and measurements, which require more theoretical efforts to understand the collision dynamics of these targets. We present in this paper the results of our modified distorted wave Born approximation (DWBA) calculation of TDCS for the ionization of Ne (2p), Ar (3p) and Xe (5p) targets. We modify the standard DWBA formalism by including the correlation-polarization potential (which is function of electron density) and compare our computed results with the available experimental and theoretical data. We observe that the polarization potential is able to improve the agreement with experimental results.

  18. Ryoji Ikeda, Data Artist - Prix Ars Electronica Collide@CERN

    CERN Multimedia

    CERN. Geneva; Koek, Ariane; Heuer, Rolf; Ikeda, Ryoji; Mr. Horst, Hoertner

    2014-01-01

    at the CERN Globe of Science and Innovation, CERN. You are very warmly invited to the opening presentation of Data Artist, Ryoji Ikeda’s residency at CERN. Ryoji Ikeda, one of the world’s leading electronic composers and visual artists, is the new Prix Ars Electronica Collide@CERN award winner. Ryoji Ikeda and his science inspiration partner, Theoretical Physicist, Dr. Tom Melia will talk about their work in arts and science. They are at the beginning of their creative journey together at CERN. A little about Ryoji Ikeda – the new Prix Ars Electronica Collide@CERN artist in residence. Ryoji Ikeda focuses on the essential characteristics of sound itself and that of visuals as light by means of both mathematical precision and mathematical aesthetics. Ikeda has gained a reputation as one of the few international artists working convincingly across both visual ...

  19. A new empirical potential energy function for Ar2

    Science.gov (United States)

    Myatt, Philip T.; Dham, Ashok K.; Chandrasekhar, Pragna; McCourt, Frederick R. W.; Le Roy, Robert J.

    2018-06-01

    A critical re-analysis of all available spectroscopic and virial coefficient data for Ar2 has been used to determine an improved empirical analytic potential energy function that has been 'tuned' to optimise its agreement with viscosity, diffusion and thermal diffusion data, and whose short-range behaviour is in reasonably good agreement with the most recent ab initio calculations for this system. The recommended Morse/long-range potential function is smooth and differentiable at all distances, and incorporates both the correct theoretically predicted long-range behaviour and the correct limiting short-range functional behaviour. The resulting value of the well depth is ? cm-1 and the associated equilibrium distance is re = 3.766 (±0.002) Å, while the 40Ar s-wave scattering length is -714 Å.

  20. An Alternate Light Curve Solution of AR Lacertae

    Directory of Open Access Journals (Sweden)

    Hong Suh Park

    1984-09-01

    Full Text Available Photoelectric UBV light curves of AR Lacertae made in one season during 1981-82 are presented. Although the shape of the light curves in the outside eclipses show a strong distortion, the scatter of observations as well as phase coverage are better than those previously available. Fourier coefficients are derived from the V-light curve and observed curve successfully rectified to the Russell model. Light curve solutions are computed and the geometrical and physical parameters of AR Lac are derived as as = 0.812, ag = 0.341, j = 86°3, Ls = 0.372, Lg = 0.628, k = 0.53, Xs = 0.85, Xg = 0.4.

  1. Formation of doubly charged argon ions, Ar2+, from long-lived highly excited argon ions, Arsup(+*), colliding with Ar and N2 gases

    International Nuclear Information System (INIS)

    Okuno, Kazuhiko

    1976-01-01

    Formation of Ar 2+ from long-lived highly excited Ar + * colliding with Ar and N 2 gases is studied by means of a tandem mass spectrometer. The tandem mass spectrometer used consists of two mass analyzers connected in series and a collision chamber located in between. The collision chamber is electrically floated and can be set at a desired potential, so that one can identify the fast ions (resulting from the primary ions) and the slow ions (secondary ions) in the mass spectra taken by the second mass analyzer. When the first mass analyzer is tuned to Ar + , peaks corresponding Ar 2+ appear in the second mass spectra. From the analysis of variation of mass positions and heights of these peaks with the change of the potential and pressure of the collision chamber, the Ar 2+ is concluded to result from the primary Ar + in collision with gas molecules and wall surface. From the threshold behavior of the product Ar 2+ with the electron energy in the ion source, three sets of long-lived highly excited Ar + * states (Rydberg states) are found to be responsible for this process. They are 3s 2 3p 4 ( 3 P)nl, 3s 2 3p 4 ( 1 D 2 )n'l and 3s 2 3p 4 ( 1 S 0 )n''l converging to Ar 2+3 Psub(2.1.0) (43.38, 43.51, 43.57 eV), 1 D 2 (45.11 eV) and 1 S 0 (47.50 eV), respectively. Their fractional ratio in the primary Ar + beam is determined as 3.0:1.0:1.2 which is close to that of multiplicities of the states concerned. The autoionization mechanism reported by other investigators to be responsible for the formation of Ar 2+ in Aston band or tandem mass spectra is found to be negligible. The cross sections of formation of Ar 2+ from Ar + * colliding with Ar and N 2 increase in proportion to the 1.15th power of the collision energy in the range from 750 eV to 2.5 keV. At the collision energy of 1.0 keV, they are 2.0x10 -20 /F cm 2 for Ar target and 6.6x10 -20 /F cm 2 for N 2 target, where the fractional density of Ar + * is estimated to be 0.7x10 -4 -4 . (auth.)

  2. Modelling the ArH+ emission from the Crab nebula

    Science.gov (United States)

    Priestley, F. D.; Barlow, M. J.; Viti, S.

    2017-12-01

    We have performed combined photoionization and photodissociation region (PDR) modelling of a Crab nebula filament subjected to the synchrotron radiation from the central pulsar wind nebula, and to a high flux of charged particles; a greatly enhanced cosmic-ray ionization rate over the standard interstellar value, ζ0, is required to account for the lack of detected [C I] emission in published Herschel SPIRE FTS observations of the Crab nebula. The observed line surface brightness ratios of the OH+ and ArH+ transitions seen in the SPIRE FTS frequency range can only be explained with both a high cosmic-ray ionization rate and a reduced ArH+ dissociative recombination rate compared to that used by previous authors, although consistent with experimental upper limits. We find that the ArH+/OH+ line strengths and the observed H2 vibration-rotation emission can be reproduced by model filaments with nH = 2 × 104 cm-3, ζ = 107ζ0 and visual extinctions within the range found for dusty globules in the Crab nebula, although far-infrared emission from [O I] and [C II] is higher than the observational constraints. Models with nH = 1900 cm-3 underpredict the H2 surface brightness, but agree with the ArH+ and OH+ surface brightnesses and predict [O I] and [C II] line ratios consistent with observations. These models predict HeH+ rotational emission above detection thresholds, but consideration of the formation time-scale suggests that the abundance of this molecule in the Crab nebula should be lower than the equilibrium values obtained in our analysis.

  3. Selective AR Modulators that Distinguish Proliferative from Differentiative Gene Promoters

    Science.gov (United States)

    2017-08-01

    Public Release; Distribution Unlimited The views, opinions and/or findings contained in this report are those of the author(s) and should not be...Research and Materiel Command Fort Detrick, Maryland 21702-5012 11. SPONSOR/MONITOR’S REPORT NUMBER(S) 12. DISTRIBUTION / AVAILABILITY STATEMENT...recognition, we performed a high -throughput screen for compounds eliciting differential AR activity on cARE vs. sARE reporters. Of 10,000 compounds

  4. Augmented reality (AR) and virtual reality (VR) applied in dentistry

    OpenAIRE

    Ta-Ko Huang; Chi-Hsun Yang; Yu-Hsin Hsieh; Jen-Chyan Wang; Chun-Cheng Hung

    2018-01-01

    The OSCE is a reliable evaluation method to estimate the preclinical examination of dental students. The most ideal assessment for OSCE is used the augmented reality simulator to evaluate. This literature review investigated a recently developed in virtual reality (VR) and augmented reality (AR) starting of the dental history to the progress of the dental skill. As result of the lacking of technology, it needs to depend on other device increasing the success rate and decreasing the risk of th...

  5. Constructing carbon nanotube junctions by Ar ion beam irradiation

    International Nuclear Information System (INIS)

    Ishaq, Ahmad; Ni Zhichun; Yan Long; Gong Jinlong; Zhu Dezhang

    2010-01-01

    Carbon nanotubes (CNTs) irradiated by Ar ion beams at elevated temperature were studied. The irradiation-induced defects in CNTs are greatly reduced by elevated temperature. Moreover, the two types of CNT junctions, the crossing junction and the parallel junction, were formed. And the CNT networks may be fabricated by the two types of CNT junctions. The formation process and the corresponding mechanism of CNT networks are discussed.

  6. Children Road Safety Training with Augmented Reality (AR) [Demo

    OpenAIRE

    Lugmayr, Artur; Tsang, Joyce; Williams, Toby; Lim, Casey X; Teo, Yeet Yung; Farmer, Matthew

    2018-01-01

    Children killed or seriously injured through road accidents can be avoided through an appropriate safety training. Through play and engagement children learn and understand hazards at i.e. railway stations, bus stops, crossings, school zones, train stations, footpaths, or while cycling. We developed a rapid prototype of an Augmented Reality (AR) safety training proof-of-concept demonstrator for a scaled real-world model of dangerous road hazards. Two scenarios have been picked to give childre...

  7. He-, Ne-, and Ar-phosgene intermolecular potential energy surfaces

    DEFF Research Database (Denmark)

    Munteanu, Cristian R.; Henriksen, Christian; Felker, Peter M.

    2013-01-01

    Using the CCSD(T) model, we evaluated the intermolecular potential energy surfaces of the He-, Ne-, and Ar-phosgene complexes. We considered a representative number of intermolecular geometries for which we calculated the corresponding interaction energies with the augmented (He complex) and doub...... of the complexes, providing valuable results for future experimental investigations. Comparing our results to those previously available for other phosgene complexes, we suggest that the results for Cl2-phosgene should be revised....

  8. BUSINESS ETHICS: THE CASE OF AR CONSULTORIA LTD A

    Directory of Open Access Journals (Sweden)

    Fernando Fantoni Bencke

    2014-03-01

    business: the significant taxes, lack of incentives and credit available and the opportunity to “make a little extra” through informal sales. AR Consultoria’s entry to the market was marked by these and other difficulties. This case aims at presenting a real situation that can be found in some organizational sectors areas, which demands readers to take a decision and an ethical stance when faced with moral challenges.

  9. 40Ar/39Ar dating and zircon chronochemistry for the Izu-Bonin rear arc, IODP site U1437

    Science.gov (United States)

    Schmitt, A. K.; Konrad, K.; Andrews, G. D.; Horie, K.; Brown, S. R.; Koppers, A. A. P.; Busby, C.; Tamura, Y.

    2016-12-01

    The scientific objective of IODP Expedition 350 drilling at Site U1437 (31°47.390'N, 139°01.580'E) was to reveal the "missing half of the subduction factory": the rear arc of a long-lived intraoceanic subduction zone. Site U1437 lies in a 50 km long and 20 km wide volcano-bounded basin, 90 km west of the Izu arc front, and is the only IODP site drilled in the rear arc. The Izu rear arc is dominated by Miocene basaltic to dacitic seamount chains, which strike at a high angle to the arc front. Radiometric dating targeted a single igneous unit (1390 mbsf), and fine to coarse volcaniclastic units for which we present zircon and 40Ar/39Ar (hornblende, plagioclase, and groundmass) age determinations. All zircons analyzed as grain separates were screened for contamination from drill-mud (Andrews et al., 2016) by analyzing trace elements and, where material was available, O and Hf isotope compositions. Igneous Unit 1 is a rhyolite sheet and yielded concordant in-situ and crystal separate U-Pb zircon ages (13.7±0.3 Ma; MSWD = 1.3; n = 40 spots), whereas the 40Ar/39Ar hornblende plateau age (12.9±0.3; MSWD = 1.1; n = 9 steps) is slightly younger, possibly reflecting pre-eruptive zircon crystallization, or alteration of hornblende. U-Pb zircon and 40Ar/39Ar plateau ages from samples above igneous Unit 1 are concordant with biostratigraphic and paleomagnetic ages (available to 1300 mbsf), but plagioclase and groundmass samples below 1300 m become younger with depth, hinting at post-depositional alteration. A single zircon from 1600 mbsf yielded a U-Pb age of 15.4±1.8 Ma; its trace element composition resembles other igneous zircons from U1437, and is tentatively interpreted as a Middle Miocene age for the lowermost lithostratigraphic unit VII. Oxygen and Hf isotopic values of igneous zircon indicate mantle origins, with some influence of assimilation of hydrothermally altered oceanic crust evident in sub-mantle oxygen isotopic compositions. Lessons from site U1437 are

  10. 40Ar-39Ar age clustering in the active phonolitic Cadamosto Seamount (Cape Verdes): Indications for periodic magmatic activity

    Science.gov (United States)

    Samrock, L. K.; Hansteen, T. H.; Wartho, J. A.

    2017-12-01

    The Cape Verde archipelago is situated 400-800 km off the west coast of Africa and is comprised of a northern and southern chain of islands and seamounts. Morphological observations and previous radiometric dating of the islands indicate a slow age progression, over 22 Ma, from east to west (Holm et al. 2008). We present the first radiometric ages for Cadamosto Seamount, which is composed of complex evolved volcanics and is situated at the southwestern tip of the Cape Verde archipelago (e.g. Barker et al. 2012). We analyzed five different submarine phonolites that were sampled by remotely operated vehicles (ROV) Kiel 6000 and dredging during the RV Meteor (M80/3) and RV Poseidon (POS320/2) cruises. Fresh sanidine, nepheline, and biotite grains were selected and carefully prepared for 40Ar-39Ar single grain total fusion analysis. Sanidine single grain 40Ar-39Ar ages from 5 samples range from 11.5 ± 6.5 ka to 349.0 ± 20.4 ka (2σ errors), and cluster in several age groupings (using the decay constant and atmospheric air ratio of Steiger & Jäger (1977), and age standard TCS2 (27.87 ± 0.04 Ma; 1σ; M.A. Lanphere, pers. comm.)). Three age groups can be identified within the youngest (0-170 ka) sanidines, which are separated by periods of 52-54 ka. Nepheline grains from one sample yielded much older ages of 169.5 ± 16.5 ka to 1521.5 ± 8.3 ka (2σ). Our data suggests young ages for the Cadamosto Seamount, which is in accordance with recorded seismic activity (Grevemeyer et al. 2010), and its position adjacent to the recently active islands of Fogo (last eruption in 2014/2015) and Brava (recent seismic activity). The different sub-groups of sanidine 40Ar-39Ar ages can be used to identify different activity maxima corresponding to cycles of magmatic productivity in a long-lived magmatic system. Ongoing petrologic investigations will be used to identify the relative importance of processes such as mantle melting rates, magma replenishment and magma chamber processes

  11. Targeting AR Variant-Coactivator Interactions to Exploit Prostate Cancer Vulnerabilities.

    Science.gov (United States)

    Magani, Fiorella; Peacock, Stephanie O; Rice, Meghan A; Martinez, Maria J; Greene, Ann M; Magani, Pablo S; Lyles, Rolando; Weitz, Jonathan R; Burnstein, Kerry L

    2017-11-01

    Castration-resistant prostate cancer (CRPC) progresses rapidly and is incurable. Constitutively active androgen receptor splice variants (AR-Vs) represent a well-established mechanism of therapeutic resistance and disease progression. These variants lack the AR ligand-binding domain and, as such, are not inhibited by androgen deprivation therapy (ADT), which is the standard systemic approach for advanced prostate cancer. Signaling by AR-Vs, including the clinically relevant AR-V7, is augmented by Vav3, an established AR coactivator in CRPC. Using mutational and biochemical studies, we demonstrated that the Vav3 Diffuse B-cell lymphoma homology (DH) domain interacted with the N-terminal region of AR-V7 (and full length AR). Expression of the Vav3 DH domain disrupted Vav3 interaction with and enhancement of AR-V7 activity. The Vav3 DH domain also disrupted AR-V7 interaction with other AR coactivators: Src1 and Vav2, which are overexpressed in PC. This Vav3 domain was used in proof-of-concept studies to evaluate the effects of disrupting the interaction between AR-V7 and its coactivators on CRPC cells. This disruption decreased CRPC cell proliferation and anchorage-independent growth, caused increased apoptosis, decreased migration, and resulted in the acquisition of morphological changes associated with a less aggressive phenotype. While disrupting the interaction between FL-AR and its coactivators decreased N-C terminal interaction, disrupting the interaction of AR-V7 with its coactivators decreased AR-V7 nuclear levels. Implications: This study demonstrates the potential therapeutic utility of inhibiting constitutively active AR-V signaling by disrupting coactivator binding. Such an approach is significant, as AR-Vs are emerging as important drivers of CRPC that are particularly recalcitrant to current therapies. Mol Cancer Res; 15(11); 1469-80. ©2017 AACR . ©2017 American Association for Cancer Research.

  12. Fatores associados a baixa adesao ao tratamento medicamentoso em idosos

    Directory of Open Access Journals (Sweden)

    Noemia Urruth Leao Tavares

    2013-12-01

    Full Text Available OBJETIVO : Analisar fatores associados à baixa adesão ao tratamento medicamentoso em idosos. MÉTODOS : Estudo transversal de base populacional, com amostra representativa de 1.593 indivíduos com 60 anos ou mais, residentes na região urbana de Bagé, RS, em 2008. A amostragem foi realizada em múltiplos estágios. Os dados foram coletados em entrevistas individuais nos domicílios. Analisou-se a associação entre a baixa adesão referida ao tratamento medicamentoso mensurado pelo Brief Medication Questionnaire (BMQ e fatores demográficos, socioeconômicos, comportamentais e de saúde, assistência e prescrição. Foi utilizado modelo de regressão de Poisson para estimar as razões de prevalência bruta e ajustada, os respectivos intervalos de confiança de 95% e p-valor (teste de Wald. RESULTADOS : Cerca de 78,0% dos indivíduos referiram ter usado algum medicamento nos sete dias precedentes à entrevista. Desses, cerca de 1 / 3 foram considerados com baixa adesão ao tratamento. Os fatores significativamente associados à baixa adesão foram: idade (65 a 74 anos, não ter plano de saúde, ter que comprar (totalmente ou em parte os seus medicamentos, ter três ou mais morbidades, possuir incapacidade instrumental para a vida diária e usar três ou mais medicamentos. CONCLUSÕES : A utilização elevada de medicamentos, decorrente da alta prevalência de doenças crônico-degenerativas em idosos, e o acesso ao tratamento devem ser considerados pelos profissionais de saúde para adoção de estratégias que visem diminuir a baixa adesão ao tratamento, aumentando a resolutividade terapêutica e a qualidade de vida desses pacientes.

  13. Estudo exploratorio da qualidade do ar em escolas de educacao basica, Coimbra, Portugal

    Directory of Open Access Journals (Sweden)

    Ana Maria Conceicao Ferreira

    2013-12-01

    Full Text Available OBJETIVO : Analisar a qualidade do ar em escolas de educação básica e suas condições estruturais e funcionais. MÉTODOS : Foi avaliada a qualidade do ar de 51 escolas (81 salas de aula de educação básica da cidade de Coimbra, Portugal, tanto na parte interior das salas como na exterior, durante as quatro estações do ano, de 2010 a 2011. Foram avaliadas a temperatura (Tº, umidade relativa (Hr, concentrações de monóxido de carbono (CO, dióxido de carbono (CO 2 , ozona (O 3 , dióxido de nitrogênio (NO 2 , dióxido de enxofre (SO 2 , compostos orgânicos voláteis (COV, formaldeído e material particulado (PM 10 , de novembro de 2010 a fevereiro de 2011 (outono/inverno e de março de 2011 a junho de 2011 (primavera/verão. Procedeu-se ao preenchimento de uma grelha de caracterização das condições estruturais e funcionais das escolas. Aplicaram-se os testes estatísticos t- Student para amostras emparelhadas e o teste t de Wilcoxon. RESULTADOS : Em 47 escolas, as concentrações médias de CO 2 encontravam-se acima da concentração máxima de referência (984 ppm mencionada na legislação portuguesa. Os valores máximos de concentração encontrados no interior das salas foram críticos, principalmente no outono/inverno (5.320 ppm. As concentrações médias de COV e de PM 10 no interior ultrapassaram a concentração máxima de referência legislada em algumas escolas. Não foram detetados valores relevantes (risco de CO, formaldeído, NO 2 , SO 2 e O 3 . CONCLUSÕES : Houve maior concentração de poluentes no interior das salas, comparativamente com o exterior. A inadequada ventilação está associada à elevada concentração de CO 2 nas salas de aula.

  14. Composite GPS Patch Antenna for the AR Bandwidth Enhancement

    Directory of Open Access Journals (Sweden)

    Minkil Park

    2016-01-01

    Full Text Available A composite Global Positioning System (GPS patch antenna with a quadrature 3 dB hybrid coupler was designed and implemented for working RHCP and had a broadband axial ratio (AR bandwidth. We designed two patches as a FR-4 patch and 1.5 mm thickness thin ceramic patch with a quadrature 3 dB hybrid coupler. A CP radiation pattern was achieved, and the AR bandwidth improved by incorporating a quadrature 3 dB hybrid coupler feed structure in a micro-strip patch antenna. SMD by chip elements was applied to the quadrature 3 dB hybrid coupler. For the composite FR-4 and ceramic patch antennas, the VSWR measurement showed a 2 : 1 ratio over the entire design band, and the 3 dB AR bandwidth was 295 and 580 MHz for the FR-4 patch and ceramic patch antennas, respectively. The antenna gains for the composite FR-4 and ceramic patch antennas were measured as 1.36–2.75 and 1.47–2.71 dBi with 15.11–25.3% and 19.25–28.45% efficiency, respectively.

  15. Ar ion beam mixing at gold-silicon interfaces

    International Nuclear Information System (INIS)

    Li Yupu; Chen Jian; Liu Jiarui; Zhang Qichu

    1987-01-01

    Ar-ion beam mixing at Au-Si interface is investigated systematically as a function of the energy of Ar-ion beam (100-300 keV), dose (5 x 10 15 - 8 x 10 16 /cm 2 ), dose rate (1.6 - 16 μA/cm 2 ) and substrate temperature (77 - 573 K). Very good ion beam mixing is obtained when the Ar-ion range distribution R p ± ΔR p fits the gold film thickness, where R p is the projected range and ΔR p is the standard deviation. At LN 2 temperature, the mixing amount is proportional to the square root of the dose but independent of the dose rate and the mixing process can be explained by the random walking model for the cascade process. At room temperature the dose rate effect is observed because of the beam current induced temperature effect. The temperature effect of the mixing amount, the uniformity, the thickness of mixing layers and the phase structure are observed

  16. Konsep Pemikiran Harun ar-Rasyid dalam Pendidikan Karakter

    Directory of Open Access Journals (Sweden)

    Ahmad Afnan Anshori

    2015-08-01

    Full Text Available CHARACTER BUILDING IN HARUN AR-RASYID THOUGH. Ampant cases of violence in society, political instability, as well as the moral degradation of the nation as a whole raises awareness of the importance of good character development at the level of the family as an institution forming the smallest nation to the character development of the nation at large. In addition to the family, the environment and education institutions also have a role no less important in the formation of national character, it’s because the institution is spearheading the development of the nation in the realm of formal education. Education as a process that helps mature, directing and developing the potential in man is regarded as an appropriate means in the formation of one’s character. One of the concepts of character education is found in the will written by Harun ar-Rashid to al-Ahmar the teacher who is appointed by the Caliph to educate the crown prince, later known as al-Amin. In this testament, there are several character education concepts, including role models of teachers, obedience, respect for family, teaching the Qur’an and Sunnah as well as many others. The concept of character education promoted by Harun ar-Rashid was not different from the concept of character education offered by modern education experts, this proves that the concept of character education contained in the will of Harun al -Rashid is universal without any limitation of space and time.

  17. Chemical changes in titanate surfaces induced by Ar+ ion bombardment

    International Nuclear Information System (INIS)

    Gonzalez-Elipe, A.R.; Fernandez, A.; Espinos, J.P.; Munuera, G.; Sanz, J.M.

    1992-01-01

    The reduction effects and compositional changes induced by 3.5 keV Ar + bombardment of several titanates (i.e. SrTiO 3 , Al 2 TiO 5 and NiTiO 3 ) have been quantitatively investigated by XPS. In all the samples studied here the original Ti 4+ species were reduced to lower oxidation states (i.e. Ti 3+ and Ti 2+ ), although to a lesser extent than in pure TiO 2 . On the contrary, whereas Sr 2+ and Al 3+ seem to remain unaffected by Ar + bombardment, in agreement with the behaviour of the respective oxides (i.e. SrO and Al 2 O 3 ), Ni 2+ appears more easily reducible to Ni o in NiTiO 3 than in NiO. In addition, other specific differences were observed between the titanates, which reveal the existence of interesting chemical effects related to the presence of the different counter-ions in the titanates. In the case of Al 2 TiO 5 , its Ar + -induced decomposition to form TiO 2 + Al 2 O 3 could be followed by XPS. (Author)

  18. Utilization of 40An/39Ar method in policyclic rocks

    International Nuclear Information System (INIS)

    Kinoshita, H.

    1976-01-01

    This work presents the results of twelve radiometric analyses by the 40 Ar/ 39 Ar method in biotites, anphiboles and plagio classes of rock of the Penhinha region. Nine determinations were made by the techniques of stepwise heating and three by metting of the sample. The different apparent ages of the minerals (515-1200 My), obtained by the technique of stepwise heating, seem to imply a a complex geologic history for the region, and confirms the existence of older emplacement nuclei, pre-Brazilians, affected by two orogenic cycles, at least, the first pre-Brazilian and the cycles, at least, the first pre-Brazilian and the second, Brazilian. On the other hand, the age determinations obtained by melting of plagioclasses (∼ 730 My), agreed with the conventional K-ar apparent ages, a fact with no geological meaning. The preliminary results show that the stepwise heating technique may become a valuable tool in the study of policyclic samples, because it permits to distinguish between disturbed and undisturbed rocks. The same cannot be said of the melting technique. In this latter case the results can be used only comparatively. (author) [pt

  19. Measurement of Ar41 release from a TRIGA reactor

    International Nuclear Information System (INIS)

    Baers, B.; Kautto, A.M.T.

    1978-01-01

    The properties of four types of gamma sensitive (Ar-41 1.29 MeV) detectors were investigated: 10 GM tubes, 1 liquid scintillation detector, NaI(Tl)-detector and Ge(Li)-detector. The ratio of the integrated net counts per statistical uncertainty was used as a figure of merit. A uniform Ar-41 activity concentration of 14.8 Bq/m 3 was simulated with a Co-60 point source of 9.6 MBq and a measuring time of 10 min. Due to temperature instabilities the normal release was not clearly detected. Therefore the detector response was obtained for pulse releases. By weighting the experimental exposure estimate with the yearly wind distributions (velocity and direction), the yearly exposure arising from 1300 hours operation of the 250 kW TRIGA reactor was estimated to 40...100 μR/y (+100% -50%) at the test point (at the height of 13 meters) for an Ar-41 release of 440...1000 GBq/y (12...28 Ci/y). By applying a line source approximation the exposure at the ground level and close distances was estimated. The maximum average exposure at a distance of about 200 meters (10 times the height of the chimney) was estimated to be about 100 μR/y. (10 times the height of the chimney) was estimated to be about 100 yR/y. Thus the radiation dose to the public is much lower than generally applied limits

  20. SIMS chemical and isotopic analysis of impact features from LDEF experiments AO187-1 and AO187-2

    Science.gov (United States)

    Stadermann, Frank J.; Amari, Sachiko; Foote, John; Swan, Pat; Walker, Robert M.; Zinner, Ernst

    1995-01-01

    Previous secondary ion mass spectrometry (SIMS) studies of extended impact features from LDEF capture cell experiment AO187-2 showed that it is possible to distinguish natural and man-made particle impacts based on the chemical composition of projectile residues. The same measurement technique has now been applied to specially prepared gold target impacts from experiment AO187-1 in order to identify the origins of projectiles that left deposits too thin to be analyzed by conventional energy-dispersive x-ray (EDX) spectroscopy. The results indicate that SIMS may be the method of choice for the analysis of impact deposits on a variety of sample surfaces. SIMS was also used to determine the isotopic compositions of impact residues from several natural projectiles. Within the precision of the measurements all analyzed residues show isotopically normal compositions.

  1. Suppression of Plant Immune Responses by the Pseudomonas savastanoi pv. savastanoi NCPPB 3335 Type III Effector Tyrosine Phosphatases HopAO1 and HopAO2

    Directory of Open Access Journals (Sweden)

    María Pilar Castañeda-Ojeda

    2017-05-01

    Full Text Available The effector repertoire of the olive pathogen P. savastanoi pv. savastanoi NCPPB 3335 includes two members of the HopAO effector family, one of the most diverse T3E families of the P. syringae complex. The study described here explores the phylogeny of these dissimilar members, HopAO1 and HopAO2, among the complex and reveals their activities as immune defense suppressors. Although HopAO1 is predominantly encoded by phylogroup 3 strains isolated from woody organs of woody hosts, both HopAO1 and HopAO2 are phylogenetically clustered according to the woody/herbaceous nature of their host of isolation, suggesting host specialization of the HopAO family across the P. syringae complex. HopAO1 and HopAO2 translocate into plant cells and show hrpL-dependent expression, which allows their classification as actively deployed type III effectors. Our data also show that HopAO1 and HopAO2 possess phosphatase activity, a hallmark of the members of this family. Both of them exert an inhibitory effect on early plant defense responses, such as ROS production and callose deposition, and are able to suppress ETI responses induced by the effectorless polymutant of P. syringae pv. tomato DC3000 (DC3000D28E in Nicotiana. Moreover, we demonstrate that a ΔhopAO1 mutant of P. savastanoi NCPBB 3335 exhibits a reduced fitness and virulence in olive plants, which supports the relevance of this effector during the interaction of this strain with its host plants. This work contributes to the field with the first report regarding functional analysis of HopAO homologs encoded by P. syringae or P. savastanoi strains isolated from woody hosts.

  2. Suppression of Plant Immune Responses by the Pseudomonas savastanoi pv. savastanoi NCPPB 3335 Type III Effector Tyrosine Phosphatases HopAO1 and HopAO2

    Science.gov (United States)

    Castañeda-Ojeda, María Pilar; Moreno-Pérez, Alba; Ramos, Cayo; López-Solanilla, Emilia

    2017-01-01

    The effector repertoire of the olive pathogen P. savastanoi pv. savastanoi NCPPB 3335 includes two members of the HopAO effector family, one of the most diverse T3E families of the P. syringae complex. The study described here explores the phylogeny of these dissimilar members, HopAO1 and HopAO2, among the complex and reveals their activities as immune defense suppressors. Although HopAO1 is predominantly encoded by phylogroup 3 strains isolated from woody organs of woody hosts, both HopAO1 and HopAO2 are phylogenetically clustered according to the woody/herbaceous nature of their host of isolation, suggesting host specialization of the HopAO family across the P. syringae complex. HopAO1 and HopAO2 translocate into plant cells and show hrpL-dependent expression, which allows their classification as actively deployed type III effectors. Our data also show that HopAO1 and HopAO2 possess phosphatase activity, a hallmark of the members of this family. Both of them exert an inhibitory effect on early plant defense responses, such as ROS production and callose deposition, and are able to suppress ETI responses induced by the effectorless polymutant of P. syringae pv. tomato DC3000 (DC3000D28E) in Nicotiana. Moreover, we demonstrate that a ΔhopAO1 mutant of P. savastanoi NCPBB 3335 exhibits a reduced fitness and virulence in olive plants, which supports the relevance of this effector during the interaction of this strain with its host plants. This work contributes to the field with the first report regarding functional analysis of HopAO homologs encoded by P. syringae or P. savastanoi strains isolated from woody hosts. PMID:28529516

  3. AR coating with high damage threshold on SiO2 glass. Final report

    International Nuclear Information System (INIS)

    Toratani, H.; Kanamori, C.; Nakajima, S.; Nakagawa, K.; Izumitani, T.

    1983-01-01

    The following experimental results are shown: (1) uniformity of AR coatings on Optosil and Sprasil provided by LLNL; (2) relation between cleaning methods and properties of AR coatings; (3) baking and sintering conditions of gel-derived films; (4) heat treatment of AR coating in O 2 flow

  4. Bartlett correction in the stable AR(1) model with intercept and trend

    NARCIS (Netherlands)

    van Giersbergen, N.P.A.

    2004-01-01

    The Bartlett correction is derived for testing hypotheses about the autoregressive parameter ρ in the stable: (i) AR(1) model; (ii) AR(1) model with intercept; (iii) AR(1) model with intercept and linear trend. The correction is found explicitly as a function of ρ. In the models with deterministic

  5. Through the Loupe: Visitor engagement with a primarily text-based handheld AR application

    NARCIS (Netherlands)

    van der Vaart, M.; Damala, A.; Guidi, G; Scopigno, R.; Torres, J.C.; Graf, H.; Remondino, F.; Duranti, L.; Brunet, P.; Hazan, S.; Barceló, J.

    2015-01-01

    The use of Augmented Reality (AR) in a museum or heritage setting holds great potential. However, until now, introducing AR into their buildings has been prohibitively expensive for most museums. On the one hand, programming the AR application could not be done in-house and would be rather costly.

  6. 75 FR 53876 - Proposed Establishment of Class E Airspace; Berryville, AR

    Science.gov (United States)

    2010-09-02

    ... Class E Airspace; Berryville, AR AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: This action proposes to establish Class E airspace at Berryville, AR... SIAPs operations at Carroll County Airport, Berryville, AR. Controlled airspace is needed for the safety...

  7. 77 FR 17363 - Proposed Establishment of Class E Airspace; West Memphis, AR

    Science.gov (United States)

    2012-03-26

    ...-0155; Airspace Docket No. 12-ASW-1] Proposed Establishment of Class E Airspace; West Memphis, AR AGENCY... action proposes to establish Class E airspace at West Memphis, AR. Separation of existing Class E... surface at West Memphis, AR, to accommodate the separation of existing Class E airspace surrounding West...

  8. 77 FR 42430 - Establishment of Class E Airspace; West Memphis, AR

    Science.gov (United States)

    2012-07-19

    ...-0155; Airspace Docket No. 12-ASW-1] Establishment of Class E Airspace; West Memphis, AR AGENCY: Federal... at West Memphis, AR. Separation of existing Class E airspace surrounding West Memphis Municipal... the West Memphis, AR, area, creating controlled airspace at West Memphis Municipal Airport (77 FR...

  9. 76 FR 53359 - Proposed Establishment of Class E Airspace; Nashville, AR

    Science.gov (United States)

    2011-08-26

    ...-0497; Airspace Docket No. 11-ASW-4] Proposed Establishment of Class E Airspace; Nashville, AR AGENCY... action proposes to establish Class E airspace at Nashville, AR. Controlled airspace is necessary to... approach procedures at Howard County Airport, Nashville, AR. Controlled airspace is needed for the safety...

  10. 75 FR 29656 - Amendment of Class E Airspace; Mountain View, AR

    Science.gov (United States)

    2010-05-27

    ...-1181; Airspace Docket No. 09-ASW-36] Amendment of Class E Airspace; Mountain View, AR AGENCY: Federal... Mountain View, AR. Decommissioning of the Wilcox non-directional beacon (NDB) at Mountain View Wilcox Memorial Field Airport, Mountain View, AR, has made this action necessary to enhance the safety and...

  11. On the effect of deterministic terms on the bias in stable AR models

    NARCIS (Netherlands)

    van Giersbergen, N.P.A.

    2004-01-01

    This paper compares the first-order bias approximation for the autoregressive (AR) coefficients in stable AR models in the presence of deterministic terms. It is shown that the bias due to inclusion of an intercept and trend is twice as large as the bias due to an intercept. For the AR(1) model, the

  12. 75 FR 5904 - Proposed Amendment of Class E Airspace; Magnolia, AR

    Science.gov (United States)

    2010-02-05

    ...-1179; Airspace Docket No. 09-ASW-35] Proposed Amendment of Class E Airspace; Magnolia, AR AGENCY... action proposes to amend Class E airspace at Magnolia, AR. Decommissioning of the Magnolia non-directional beacon (NDB) at Magnolia Municipal Airport, Magnolia, AR, has made this action necessary for the...

  13. 75 FR 6594 - Proposed Amendment of Class E Airspace; Osceola, AR

    Science.gov (United States)

    2010-02-10

    ...-1183; Airspace Docket No. 09-ASW-38] Proposed Amendment of Class E Airspace; Osceola, AR AGENCY... action proposes to amend Class E airspace at Osceola, AR. Decommissioning of the Osceola non-directional beacon (NDB) at Osceola Municipal Airport, Osceola, AR, has made this action necessary for the safety and...

  14. 78 FR 25231 - Proposed Establishment of Class E Airspace; Colt, AR

    Science.gov (United States)

    2013-04-30

    ...-1281; Airspace Docket No. 12-ASW-13] Proposed Establishment of Class E Airspace; Colt, AR AGENCY... action proposes to establish Class E airspace at Colt, AR. Controlled airspace is necessary to...-mile radius of Delta Regional Airport, Colt, AR, to accommodate new standard instrument approach...

  15. 75 FR 43884 - Proposed Amendment of Class E Airspace; Searcy, AR

    Science.gov (United States)

    2010-07-27

    ...-1182; Airspace Docket No. 09-ASW-37] Proposed Amendment of Class E Airspace; Searcy, AR AGENCY: Federal... proposes to amend Class E airspace at Searcy, AR. Decommissioning of the Searcy non-directional beacon (NDB) at Searcy Municipal Airport, Searcy, AR, has made this action necessary for the safety and management...

  16. Noninvasive Detection of AR-FL/AR-V7 as a Predictive Biomarker for Therapeutic Resistance in Men with Metastatic Castration-Resistant Prostate Cancer

    Science.gov (United States)

    2017-10-01

    acknowledged federal support) 5. Antonarakis ES, Armstrong AJ, Dehm SM, Luo J. Androgen receptor variant-driven prostate cancer : clinical implications...Resistant Prostate Cancer abstract Purpose A splice variant of the androgen receptor , AR-V7, confers resistance to AR-targeted therapies (ATTs) but not...androgen receptor ; AR-V7, androgen receptor splice variant 7; mCRPC, metastatic castration-resistant prostate cancer ; n/N, number of patients in that

  17. Suporte relacionado ao cuidado em saúde ao doente com aids: o modelo de comboio e a enfermagem

    Directory of Open Access Journals (Sweden)

    Edilene Aparecida Araújo da Silveira

    2011-06-01

    Full Text Available O presente estudo teve como objetivo conhecer a relação e a troca de suporte entre o doente com AIDS e pessoas à sua volta. O estudo está baseado no modelo de comboio das relações sociais que tem como uma de suas características a representação da rede em três círculos concêntricos. Os participantes eram pessoas que estavam internadas e que falaram sobre o suporte relacionado ao cuidado em saúde proporcionado por pessoas próximas, ou seja, que pertenciam ao círculo interno do comboio. A maioria dos participantes descreveu o círculo como sendo composto por no máximo cinco integrantes, sendo que pessoas da família foram as mais citadas. Os profissionais de saúde precisam conhecer o paciente e seu comboio, reconhecendo-os no contexto psicossocial e cultural de forma a favorecer a aceitação da soropositividade, mudanças no estilo de vida, ajuda nos cuidados de saúde e adesão ao tratamento.

  18. Prevalência de anticorpos antivírus da arterite dos eqüinos em cavalos criados no Estado de São Paulo Prevalence of equine arteritis virus specific antibodies in horses of São Paulo State, Brazil

    Directory of Open Access Journals (Sweden)

    M.C.C.S.H. Lara

    2002-06-01

    Full Text Available Utilizou-se a prova de soroneutralização em microplacas para detecção de anticorpos antivírus da arterite dos eqüinos em 659 amostras de soro sangüíneo de animais criados no Estado de São Paulo. A prevalência de anticorpos na população estudada foi igual a 18,2%. A raça Mangalarga foi a que apresentou maior taxa de prevalência, 33,3%. Animais na faixa etária de 6 a 24 meses de idade apresentaram a maior taxa de prevalência, 30,4%, e as fêmeas apresentaram prevalência de 22, 9%, mais alta do que nos machos.With the purpose of studying the prevalence of equine viral arteritis in horses raised in São Paulo State, Brazil, by the standard microtiter serum neutralization test, 659 serum samples were investigated. The prevalence of antibodies in the horse population was 18.2%, which was significantly higher in Mangalarga horses (33.3% than in any other breed (Thoroughbred, Arab, Quarter Horse, mixed breeds and others. The distribuition of horses by age showed that horses between 6 to 24 months of age (30.4% had a higher prevalence (30.4% rate than others. The female horses prevalence rate of 22.9% was significantly higher than in male horses.

  19. 40Ar/39Ar Dating of Zn-Pb-Ag Mineralization in the Northern Brooks Range, Alaska

    Science.gov (United States)

    Werdon, Melanie B.; Layer, Paul W.; Newberry, Rainer J.

    2004-01-01

    The 40Ar/39Ar laser step-heating method potentially can be used to provide absolute ages for a number of formerly undatable, low-temperature ore deposits. This study demonstrates the use of this method by determining absolute ages for Zn-Pb-Ag sediment-hosted massive sulfide deposits and vein-breccia occurrences found throughout a 300-km-long, east-west-trending belt in the northern Brooks Range, Alaska. Massive sulfide deposits are hosted by Mississippian to Pennsylvanian(?) black carbonaceous shale, siliceous mudstone, and lesser chert and carbonate turbidites of the Kuna Formation (e.g., Red Dog, Anarraaq, Lik (Su), and Drenchwater). The vein-breccia occurrences (e.g., Husky, Story Creek, West Kivliktort Mountain, Vidlee, and Kady) are hosted by a deformed but only weakly metamorphosed package of Upper Devonian to Lower Mississippian mixed continental and marine clastic rocks (the Endicott Group) that stratigraphically underlie the Kuna Formation. The vein-breccias are mineralogically similar to, but not spatially associated with, known massive sulfide deposits. The region's largest shale-hosted massive sulfide deposit is Red Dog; it has reserves of 148 Mt grading 16.6 percent zinc, 4.5 percent lead, and 77 g of silver per tonne. Hydrothermally produced white mica in a whole-rock sample from a sulfide-bearing igneous sill within the Red Dog deposit yielded a plateau age of 314.5 Ma. The plateau age of this whole-rock sample records the time at which temperatures cooled below the argon closure temperature of the white mica and is interpreted to represent the minimum age limit for massive sulfide-related hydrothermal activity in the Red Dog deposit. Sulfide-bearing quartz veins at Drenchwater crosscut a hypabyssal intrusion with a maximum biotite age of 337.0 Ma. Despite relatively low sulfide deposition temperatures in the vein-breccia occurrences (162°-251°C), detrital white mica in sandstone immediately adjacent to large vein-breccia zones was partially to

  20. Dating quartz: Ar/Ar analyses of coexisting muscovite and fluid inclusion - rich quartz from paleocene amorphic aureole

    International Nuclear Information System (INIS)

    Matthews, S.J.; Perez de Arce, C.; Cornejo, P.; Cuitino, L; Klein, J

    2001-01-01

    We present Ar/Ar total fusion and step-heating data for coexisting muscovite and white quartz from the metamorphic aureole of the Lower Paleocene La Copiapina Pluton, 6 km south of Inca de Oro, III Region, Chile. The pluton intrudes the upper clastic sedimentary member of the Punta del Cobre Group (Upper Jurassic - Lower Cretaceous) and the calcareous sedimentary rocks of the Chanarcillo Group (Neocomian), and comprises fine to coarse grained pyroxene-hornblende-biotite quartz diorites and monzodiorites. Its emplacement was controlled on its north-western side by a subvertical NE-trending fault, along which were developed vertically banded skarns (skarn mylonite), suggesting syntectonic intrusion. Biotite K-Ar ages for the pluton fall in the range 61-63 Ma, relating it to a latest Cretaceous to Lowest Paleocene syn-compressional intrusive belt which is present in the area (Matthews and Cornejo, 2000). A metamorphic / metasomatic aureole is developed within the sandstones of the Punta del Cobre Group, on the extreme northern limit of the pluton. In this area, the sedimentary rocks have been replaced by quartz-sericite and quartz-muscovite assemblages, with minor hematite and tourmaline, and late supergene kaolinite and pyrophyllite. A coarse muscovite-quartz-tourmaline-hematite assemblage is developed in and around older (early Upper Cretaceous) andesitic dykes, in the form of replacement / fracture fill veins and replacement zones. Further from the contact with the pluton, fine-grained quartz-sericite rock with coarser muscovite-rich replacement veins represents the dominant lithology. Quartz in the coarse replacement rock is very rich in fluid inclusions. Primary inclusions are mainly of two coexisting types; bi-phase (liquid and gas bubble) and tri-phase (liquid, gas bubble and halite crystal), indicating that the quartz formed in the presence of a boiling fluid. Some inclusions also contain sylvite and occasional hematite daughter crystals. Secondary inclusions