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Sample records for ativado em po

  1. Ácidos húmicos e carvão vegetal ativado como amenizantes em solo contaminado por chumbo

    OpenAIRE

    2014-01-01

    A contaminação de solos por chumbo representa importante risco à saúde humana, sendo o município de Santo Amaro da Purificação, BA, um dos mais graves casos de contaminação do metal. O objetivo deste trabalho foi avaliar o efeito de ácidos húmicos e carvão vegetal ativado como amenizantes da toxidez de Pb para plantas de milho cultivadas em solo contaminado, coletado próximo à área da metalúrgica responsável pela contaminação. As doses foram estabelecidas com base no teor de C dos materiais (...

  2. TRATAMENTO DE ÁGUAS AMARELAS EM LEITO FILTRANTE INTERMITENTE DE CARVÃO ATIVADO

    OpenAIRE

    Guimarães, Pablo Luiz Fernandes; de Oliveira, Rui; Coura, Mônica de Amorim; Araújo, Narcísio Cabral de; Rodrigues, Andréa Carla Lima

    2014-01-01

    http://dx.doi.org/10.5902/2236130814765 http://dx.doi.org/10.5902/2236130814765O presente trabalho tem o objetivo de estudar o desempenho de um leito percolador (filtro) intermitente, preenchido com carvão ativado granulado, no tratamento de águas amarelas, a fim de verificar o potencial desta tecnologia como parte integrante de sistemas ecológicos descentralizados de tratamento de águas residuárias. Para verificar a eficiência do filtro o afluente e o efluente tratado foram caracterizados...

  3. Estudo do tratamento de aguas residuarias sinteticas por lodo ativado em reator batelada sequencial com tempo longo de duração

    OpenAIRE

    Ana Catarina Gomes Parente

    1998-01-01

    Resumo: O processo de tratamento de águas residuárias por lodo ativado em reator batelada seqüencial (RBS) apresenta várias vantagens: grande flexibilidade de operação; é apropriado para tratar efluentes com variação de carga hidráulica e orgânica e apresentam excelente razão custo/benefício, razões pelas qual o interesse por sua utilização tem aumentado nos últimos anos. No presente trabalho estudou-se o tratamento de águas residuárias sintéticas por lodo ativado em reator RBS, com longo tem...

  4. Tratamento do líquido gerado no beneficiamento da casca de coco verde em sistema de lodos ativados

    OpenAIRE

    2007-01-01

    O principal impacto ambiental do processo de beneficiamento da casca de coco verde é a geração de resíduo líquido com elevada carga orgânica. Este trabalho teve como objetivo aplicar o sistema convencional de lodos ativados para o tratamento biológico do líquido gerado no beneficiamento da casca de coco verde, além de utilizar o teste de taxa de consumo de oxigênio (TCO) para avaliar a toxicidade do efluente ao lodo aeróbio. O reator de escala laboratorial foi inoculado com lodo proveniente d...

  5. Remoção de microcistina-LR de águas eutrofizadas por clarificação e filtração seguidas de adsorção em carvão ativado granular

    OpenAIRE

    Alaine de Brito Guerra; Marina Caldeira Tonucci; Beatriz Susana Ovruski de Ceballos; Hindria Renally Cavalcanti Guimarães; Wilton Silva Lopes; Sérgio Francisco Aquino; Marcelo Libânio

    2015-01-01

    RESUMO Usualmente, o tratamento convencional de águas com altas densidades de cianobactérias e concentração de cianotoxinas não garante efluente consoante o padrão de potabilidade vigente (1,0 µg.L-1 de microcistina). Etapas adicionais fazem-se necessárias, destacando-se a adsorção por carvão ativado granular ou pulverizado. Neste contexto, o objetivo geral deste trabalho foi avaliar em escala de bancada a remoção de microcistina em água natural por adsorção em colunas de carvão ativado granu...

  6. EFEITO DA CONCENTRAÇÃO DE TIOCIANATO NA EFICIÊNCIA DO SISTEMA LACTOPEROXIDASE ATIVADO EM LEITE CRU

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    ELIZEU ANTONIO ROSSI

    2009-07-01

    Full Text Available

    RESUMO: Concentrações que variaram de 3,5 a 100 mg/L de SCN- foram avaliadas quanto ao efeito sobre a efetividade do sistema antibacteriano lactoperoxidase, em amostras de leite cru do tipo “B”, apresentando contagem bacteriana da ordem de 105 ufc/mL. As amostras, mantidas em temperatura de 25ºC durante o experimento, foram adicionadas de 8 mg/L de H2O2, exceto aquela destinada ao controle (sistema lactoperoxidase não ativado. A ação do sistema foi avaliada indiretamente através da determinação da acidez titulável, da medida de pH, da prova do alizarol e da estabilidade do álcool. Foi adotado como parâmetro indicativo da manutenção da qualidade do leite o aumento máximo de 0,02 unidades no valor da acidez titulável (expressa em % de ácido lático. Os resultados permitiram concluir que a eficiência do sistema lactoperoxidase é diretamente proporcional á concentração de SCN- até 12 mg/L. a partir desse valor, o efeito permanece constante para concentrações de até 100 mg/L. PALAVRAS-CHAVE: Leite cru; conservação, sistema lactoperoxidase; concentração de tiocianato.

  7. Imobilização da pancreatina em carvão ativado e em alumina para o preparo de hidrolisados de soro de leite = Immobilization of pancreatin in activated carbon and in alumina for preparing whey hydrolysates

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    Viviane Dias Medeiros Silva

    2005-07-01

    Full Text Available Tendo como objetivo a redução de custos do processo de fabricação dehidrolisados protéicos, estudou-se neste trabalho a imobilização da pancreatina, por adsorção, em carvão ativado e em alumina. Para isso, foram testadas diferentes condições de imobilização (30, 60 e 90min a 25°C, e 12h a 5°C. Para verificar a taxa de imobilização, determinou-se indiretamente a enzima não adsorvida nos suportes. Ao se utilizar o carvão ativado, não foi observada diferença significativa entre as condições testadas, tendo-se obtido 100% de imobilização enzimática. Para a alumina, a melhor condição foi a de 90min, na qual se obteve 37% de imobilização. A medida do grau de exposição da fenilalanina, pela espectrofotometria derivada segunda, foi empregada para a determinação da estabilidade operacional da enzima, tendo sido mostrado que a imobilização em carvão ativado e emalumina permitiu a reutilização da pancreatina por até 5 vezes e 2 vezes, respectivamente.Immobilization of pancreatin in activated carbon and in alumina was studied for producing protein hydrolysates, in order to reduce the process costs. Different immobilization conditions were tested (30, 60 and 90min at 25°C, and 12h at 5°C. For estimating the immobilization rate the amount of the non-adsorbed enzyme on the supports was indirectly determined. When activated carbon was used, no significant difference was observed among the tested conditions, obtaining 100% of enzymatic immobilization. In case of alumina, the best condition showed to be the 90min treatment which produced 37% of immobilization. The evaluation of the degree of exposition ofphenylalanine, by second derivative spectrophotometry, was used for the determination of the enzyme operational stability, and showed that the immobilization in activated carbon and in alumina allowed the reusability of the pancreatin for 5 times and 2 times,respectively.

  8. Cultivo de embriões imaturos de citros em diferentes concentrações de carvão ativado e ácido giberélico Activated charcoal and giberellic acid concentrations on immature embryos culture

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    Edvan Alves Chagas

    2005-12-01

    Full Text Available Adição de carvão ativado e giberelina no meio de cultura podem proporcionar melhores condições no desenvolvimento de embriões imaturos de citros. Objetivou-se avaliar o efeito de carvão ativado e GA3 (ácido giberélico no cultivo de embriões imaturos provenientes do cruzamento entre laranjeira 'Pêra Rio' x tangerineira 'Poncã'. Após 118 dias da polinização, frutos imaturos, com 3 a 4 cm de diâmetro, foram coletados, suas sementes removidas e tratadas com álcool (70% por cinco minutos, hipoclorito de sódio (2% por 20 minutos e, posteriormente, lavadas três vezes em água destilada e autoclavada. Em condições assépticas, os tegumentos das sementes foram separados, os embriões globulares excisados e inoculados em tubos de ensaio contendo 15 mL do meio MT, acrescido de carvão ativado (0; 0,5; 1; 1,5 e 2 g L-1 e GA3 (0; 0,01; 0,1; 1 e 10 mg L-1. Após a inoculação, os embriões permaneceram por 90 dias em sala de crescimento a 27+1ºC, fotoperíodo de 16 horas e irradiância de 32 mmol m-2 s-1. Maior comprimento da parte aérea foi obtido em meio MT, acrescido de 0,1 e 1 mg L-1 de GA3, combinado com 2 g L-1 de carvão ativado. Maior comprimento do sistema radicular, massa da matéria fresca e número de folhas de plântulas foram obtidos em meio MT, acrescido de 0,01 mg L-1 de GA3, na ausência de carvão ativado. A adição de carvão ativado influenciou na concentração de ácido giberélico acrescido no meio de cultura.Activated charcoal and gibberelin provides better conditions on development of citrus immature embryos. Activated charcoal and GA3 (gibberelic acid on 'Pêra Rio' sweet orange x 'Poncã' mandarin immature embryos culture was evaluated. After 118 days-pollination, imature fruits with 3 to 4 cm of diameter were collected, seeds removed and treated with alcohol (70% for five min., sodium hypoclorite (2% for 20 min. and three times washed with distilled and autoclaved water. In aseptic conditions, the teguments

  9. Avaliação da adsorção de Fenol e Bisfenol A em carvões ativados comerciais de diferentes matrizes carbonáceas

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    Carla Rênes de Alencar Machado

    2015-11-01

    Full Text Available A remoção de compostos orgânicos tóxicos e micropoluentes orgânicos, provenientes de efluentes industriais, é uma crescente preocupação a fim de aumentar a qualidade da água para reúso. Para alcançar tal qualidade, alguns tratamentos têm se mostrado eficientes, tais como a adsorção em carvão ativado. Assim, o presente estudo avaliou a adsorção de fenol e bisfenol A (BPA em carvões ativados comerciais de diferentes matrizes carbonáceas: betuminosa (CB e vegetal (CV. Os carvões foram caracterizados por microscopia eletrônica de varredura (MEV acoplada ao espectro de energia dispersiva (EDS, infravermelho (FTIR e área superficial BET (Brunauer, Emmett, Teller. Foram realizados ensaios para definição de tempo de equilíbrio e ensaios para ajuste de isotermas de adsorção (Freundlich e Langmuir. A adsorção de fenol pelos dois tipos de carvões mostrou-se favorável, com remoção de 96% para o carvão CB e 91% para o carvão CV. No entanto, a adsorção de bisfenol A foi eficiente apenas para o carvão CB, com eficiências de remoção em torno de 90% contra 20% alcançado pelo carvão CV. As capacidades adsortivas encontradas para o carvão CB foram de 125 mg fenol.g-1 e 76 mg BPA.g-1, enquanto que para o carvão CV foram 99 mg fenol.g-1 e 27 mg BPA.g-1. Esses resultados estão associados à maior presença de grupos ácidos no carvão CV e à hidrofobicidade do BPA, o que torna o processo de adsorção desfavorável.

  10. Pré-oxidação e adsorção em carvão ativado granular para remoção dos herbicidas Diuron e Hexazinona de água subterrânea Preoxidation and adsorption in granular activated carbon for the removal of Diuron and Hexazinone from groundwater

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    Angela Di Bernardo Dantas

    2009-09-01

    Full Text Available O cultivo da cana-de-açúcar exige a utilização de herbicidas, destacando-se o Diuron e a Hexazinona. Alguns dos poços de abastecimento de Ribeirão Preto (SP construídos no Aquífero Guarani estão situados em pontos de recarga, e a presença de solo de textura arenosa nessas áreas aumenta a vulnerabilidade da água subterrânea à contaminação por herbicidas. Neste trabalho foram monitorados alguns poços localizados na área de recarga e estudou-se a remoção de Diuron e Hexazinona por meio da adsorção em carvão ativado granular (CAG e da pré-oxidação com cloro e dióxido de cloro em uma instalação piloto de escoamento contínuo. Verificou-se que o tempo de saturação do CAG no ensaio com a pré-oxidação foi inferior ao obtido no ensaio sem a pré-oxidação com ambos os oxidantes, possivelmente pela formação de subprodutos que competiram com a adsorção dos herbicidas.The cultivation of sugarcane demands the use of herbicides such as Diuron and Hexazinone. Some supply wells from Ribeirão Preto, SP, Brazil, built in the Guarani Aquifer are located in recharge points, and the presence of sandy Quartzarenic Neosol in these areas increases the vulnerability of the groundwater to contamination from herbicides This paper reports the water quality monitored in some wells located in the recharge area and the removal of Diuron and Hexazinone by means of adsorption in granular activated carbon (GAC, preceded or not by preoxidation with chlorine and chlorine dioxide in a pilot plant. The results indicated that Diuron was more strongly adsorbed than Hexazinone and that the saturation time of the GAC in the test with preoxidation was shorter than in the test without preoxidation, which may have occurred mainly due to the formation of by-products that competed with the adsorption of the herbicides.

  11. A pessoalidade poética em Fernando Pessoa

    OpenAIRE

    Reginaldo Parcianello

    2015-01-01

    Esta pesquisa investiga a pessoalidade poética em Fernando Pessoa. A base do estudo é a estética da formatividade de Luigi Pareyson, da qual extraímos as principais categorias concernentes à hermenêutica literária. É uma investigação interdisciplinar, no tocante a seu arcabouço estético e literário, mas se trata inequivocamente de uma tese sobre literatura, pois a temática filosófica que é transversal ao todo da pesquisa esclarece e interpreta a pluralidade de poemas de Pessoa, em todos os tó...

  12. Obtenção e caracterização de materiais argilosos quimicamente ativados para utilização em catálise Preparation and characterization of chemically activated clays for use in catalysis

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    M. G. F. Rodrigues

    2006-12-01

    Full Text Available O principal objetivo deste trabalho é caracterizar argilas esmectíticas "Chocolate" de Boa-Vista, PB, tanto na sua forma natural quanto tratada quimicamente, visando sua aplicação em catálise. As argilas foram caracterizadas por fluorescência de raios X, difração de raios X e espectrofotometria de absorção óptica na região do infravermelho. Os resultados mostraram que o tratamento ácido alterou a estrutura da montmorilonita. A reação de isomerização do meta-xileno, para o material ativado, mostrou que a argila ácida foi mais ativa que a natural.The main objective of this paper is to characterize the chocolate smectite clays of Boa-Vista, PB, Brazil, in their natural form, and after chemical treatment, for their application in catalysis. The experimental methods were: X-ray fluorescence, X-ray diffraction and infrared spectroscopy. The results show that the acid treatment altered the montimorillonite structure. The obtained reaction (isomerization of m-xylene for the treated material showed that treated clays were more active than the natural ones.

  13. Imobilização da pancreatina em carvão ativado e em alumina para o preparo de hidrolisados de soro de leite - DOI: 10.4025/actascihealthsci.v27i2.1417 Immobilization of pancreatin in activated carbon and in alumina for preparing whey hydrolysates - DOI: 10.4025/actascihealthsci.v27i2.1417

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    Marialice Pinto Coelho Silvestre

    2005-03-01

    Full Text Available Tendo como objetivo a redução de custos do processo de fabricação de hidrolisados protéicos, estudou-se neste trabalho a imobilização da pancreatina, por adsorção, em carvão ativado e em alumina. Para isso, foram testadas diferentes condições de imobilização (30, 60 e 90min a 25°C, e 12h a 5°C. Para verificar a taxa de imobilização, determinou-se indiretamente a enzima não adsorvida nos suportes. Ao se utilizar o carvão ativado, não foi observada diferença significativa entre as condições testadas, tendo-se obtido 100% de imobilização enzimática. Para a alumina, a melhor condição foi a de 90min, na qual se obteve 37% de imobilização. A medida do grau de exposição da fenilalanina, pela espectrofotometria derivada segunda, foi empregada para a determinação da estabilidade operacional da enzima, tendo sido mostrado que a imobilização em carvão ativado e em alumina permitiu a reutilização da pancreatina por até 5 vezes e 2 vezes, respectivamenteImmobilization of pancreatin in activated carbon and in alumina was studied for producing protein hydrolysates, in order to reduce the process costs. Different immobilization conditions were tested (30, 60 and 90min at 25°C, and 12h at 5°C. For estimating the immobilization rate the amount of the non-adsorbed enzyme on the supports was indirectly determined. When activated carbon was used, no significant difference was observed among the tested conditions, obtaining 100% of enzymatic immobilization. In case of alumina, the best condition showed to be the 90min treatment which produced 37% of immobilization. The evaluation of the degree of exposition of phenylalanine, by second derivative spectrophotometry, was used for the determination of the enzyme operational stability, and showed that the immobilization in activated carbon and in alumina allowed the reusability of the pancreatin for 5 times and 2 times, respectively

  14. Uso de carvão ativado e resina de troca iônica para limpeza e concentração de enzimas em extratos de madeira biodegradada - 10.4025/actascitechnol.v32i4.5671

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    Walter Carvalho

    2010-12-01

    Full Text Available Ceriporiopsis subvermispora foi utilizado para a biodegradação de cavacos de Eucalyptus grandis na presença ou ausência de cossubstratos (glicose e milhocina durante 7, 14 e 28 dias. Os cavacos obtidos em cada um desses períodos foram extraídos com tampão acetato de sódio 50 mM (pH 5,5 adicionado de 0,01% de Tween 60. A atividade de manganês peroxidases (MnPs nos extratos foi marcante ao longo de todo o período de biodegradação, tanto na ausência (430, 765 e 896 UI kg-1, respectivamente quanto na presença de cossubstratos (1.013, 2.066 e 2.323 UI kg-1, respectivamente. Os extratos apresentaram elevadas relações entre absorbância a 280 e a 405 nm, indicando forte abundância de compostos aromáticos derivados da lignina em relação à heme-peroxidases. A adsorção em carvão ativado se mostrou uma estratégia adequada para reduzir a absorbância a 280 nm em todos os extratos. Além disso, permitiu maximizar a capacidade de um leito de resina trocadora de ânions (DEAE Sepharose, utilizado para concentrar as MnPs presentes nos referidos extratos. Concluiu-se que o uso de carvão ativado seguido de adsorção em DEAE Sepharose é uma estratégia que pode ser utilizada para concentrar MnPs em extratos obtidos durante a biodegradação de E. grandis por C. subvermispora.

  15. O concerto dissonante da modernidade: narrativa poética e poesia em prosa

    OpenAIRE

    Pires, Antônio Donizeti [UNESP

    2006-01-01

    O presente trabalho parte da discussão preliminar de conceitos dúbios da teoria da poesia lírica e da teoria da narrativa para, em seguida, investigar e conceituar a narrativa poética, considerando-a, ao lado da poesia em prosa – pelas muitas possibilidades de construção e recepção que encetam – como forma privilegiada da modernidade literária. Palavras-chave: Poesia. Prosa. Poesia em prosa. Prosa poética. Narrativa poética. Gêneros literários. Modernidade. 

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

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    Luis Nieder

    1987-07-01

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

  17. Caracterização da microfauna em estação de tratamento de esgotos do tipo lodos ativados: um instrumento de avaliação e controle do processo Microfauna characterization in activated sludge wastewater treatment plant: an instrument of assessment and control of process

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    Alessandra Pellizzaro Bento

    2005-12-01

    Full Text Available A microfauna presente em uma ETE por lodos ativados foi caracterizada, correlacionada com parâmetros físico-químicos e utilizada em modelos existentes de avaliação de sistemas. Durante 351 dias o lodo ativado manteve-se estável com flocos compactos, pequenos e com poucos filamentos. Os protozoários predominantes no lodo foram as tecamebas e os ciliados predadores de flocos, indicando estabilidade do sistema. Os métodos propostos em literatura, baseados no IBL, na densidade total da microfauna e na relação entre ciliados predadores de flocos e ciliados fixos, mostraram-se eficientes para o diagnóstico das condições depurativas do sistema. A análise qualitativa do lodo, englobando o tamanho, quantidade de filamentos, compactação e a identificação das espécies dominantes, foi suficiente para uma caracterização imediata das condições depurativas do sistema de tratamento.Microfauna found in an activated sludge WTP was characterized, correlated to the physical-chemical parameters and used in existing assessment models. During 351 days, the activated sludge remained stable with compacted and small poorly filamentous flocs. It was composed mainly by testate amoebas and crawling ciliates that indicated the stability of the system. The application of the existent system evaluation models to microfauna (SBI, crawling ciliate/attached ciliate relation and total density was found to be efficient for the assessment of the system depurative conditions. The sludge qualitative analysis, which included the flocs size, amount of filaments, compacting and the identification of the dominant microfauna species, was enough to an immediate diagnosis of the treatment system depurative conditions.

  18. Efeito da temperatura e do tamanho de partículas na adsorção do corante Remazol Amarelo Ouro RNL em carvão ativado - DOI: 10.4025/actascitechnol.v31i2.1310

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    Expedito Besinella Junior

    2009-06-01

    Full Text Available Os efluentes de tinturaria constituem um problema ambiental, uma vez que apresentam elevada quantidade de carga orgânica e de cor. Os processos de coagulação e adsorção são os mais utilizados na remoção de corantes têxteis. Neste trabalho foram determinadas as isotermas de adsorção do corante reativo Remazol Amarelo Ouro RNL em carvão ativado de casca de coco. Foram estudadas duas variáveis: temperatura (30 e 40ºC e tamanho de partícula (1,70 ± 0,30 mm e 3,00 ± 0,40 mm. Os resultados mostraram que o aumento na temperatura ou a diminuição do diâmetro das partículas promove aumento na adsorção. O modelo de Langmuir-Freundlich apresentou melhor ajuste entre os modelos testados.

  19. Uso de carvão ativado e resina de troca iônica para limpeza e concentração de enzimas em extratos de madeira biodegradada = Use of activated charcoal and ion-exchange resin to cleaN up and concentrate enzymes in extracts from biodegraded wood

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    André Ferraz

    2010-10-01

    Full Text Available Ceriporiopsis subvermispora foi utilizado para a biodegradação de cavacos de Eucalyptus grandis na presença ou ausência de cossubstratos (glicose e milhocina durante 7, 14 e 28 dias. Os cavacos obtidos em cada um desses períodos foram extraídos com tampãoacetato de sódio 50 mM (pH 5,5 adicionado de 0,01% de Tween 60. A atividade de manganês peroxidases (MnPs nos extratos foi marcante ao longo de todo o período de biodegradação, tanto na ausência (430, 765 e 896 UI kg-1, respectivamente quanto na presença de cossubstratos (1.013, 2.066 e 2.323 UI kg-1, respectivamente. Os extratos apresentaram elevadas relações entre absorbância a 280 e a 405 nm, indicando forte abundância de compostos aromáticos derivados da lignina em relação à heme-peroxidases. A adsorção em carvão ativado se mostrou uma estratégia adequada para reduzir a absorbância a280 nm em todos os extratos. Além disso, permitiu maximizar a capacidade de um leito de resina trocadora de ânions (DEAE Sepharose, utilizado para concentrar as MnPs presentes nos referidos extratos. Concluiu-se que o uso de carvão ativado seguido de adsorção em DEAE Sepharose é uma estratégia que pode ser utilizada para concentrar MnPs em extratos obtidos durante a biodegradação de E. grandis por C. subvermispora.Ceriporiopsis subvermispora was used for the biodegradation of Eucalyptus grandis chips in the presence or absence of cosubstrates(glucose and corn steep liquor during 7, 14 and 28 days. Afterwards, the biodegraded chips were extracted with 50 mM sodium acetate buffer (pH 5.5 supplemented with 0.01% Tween 60. High activities of manganese peroxidases (MnPs were observed in all the extracts, both in the absence (430, 765 and 896 UI kg-1, respectively and in the presence of co-substrates (1,013; 2,066 and 2,323 UI kg-1, respectively. The extracts presented a high ratio between absorbances at 280 and 405 nm, indicating a strong abundance of aromatic compounds derived from

  20. A poética da tradução em Walter Benjamin e Haroldo de Campos

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    Luciene Guimarães de Oliveira

    2005-04-01

    Full Text Available Este ensaio visa traçar um paralelo entre a poética da tradução de Walter Benjamin, em “A Tarefa do Tradutor”, e a de Haroldo de Campos, poeta, tradutor, e crítico brasileiro em sua teoria da tradução.

  1. Methodology for {sup 210}Po extraction from underground waters; Metodologia para a extracao de Po-210 em aguas subterraneas

    Energy Technology Data Exchange (ETDEWEB)

    Conceicao, Fabiano Tomazini da; Bonotto, Daniel Marcos [UNESP, Rio Claro, SP (Brazil). Inst. de Geociencias e Ciencias Exatas. Dept. de Petrologia e Metalogenia

    1998-07-01

    This work describes the first results obtained by the implementation of the methodology of {sup 210}Po extraction from underground waters. This methodology was first tested in the analysis of uranite sample from the Pocos de Caldas plateau (MG-Brazil) which constitutes a important natural source of {sup 210}Po. For the uranine sample a counting rate of 1.67 cpm for {sup 210}Po was obtained and for underground water 0.3 cpm was obtained which demonstrates that the used methodology is efficient for water analysis.

  2. Remoção de diclofenaco, ibuprofeno, naproxeno e paracetamol em filtro ecológico seguido por filtro de carvão granular biologicamente ativado Removal of diclofenac, ibuprofen, naproxen, and paracetamol in ecological filter followed by granular carbon filter biologically active

    Directory of Open Access Journals (Sweden)

    Caroline Moço Erba

    2012-06-01

    Full Text Available O filtro ecológico representa uma promissora tecnologia de tratamento, em razão desta não necessitar da aplicação de produtos químicos, além de sua constatada eficiência. Nele, estabelece-se entre os seres vivos a relação de cadeia alimentar. Inicialmente uma matriz aquosa foi acrescida de quatro fármacos (diclofenaco, naproxeno, ibuprofeno e paracetamol e posteriormente analisada por cromatografia líquida de alta eficiência para avaliar a remoção desses compostos pelo filtro ecológico seguido pelo filtro de carvão granular biologicamente ativado. Parâmetros, entre eles turbidez, coliformes totais e termotolerantes, cor aparente e cor verdadeira, foram mensurados para verificar a eficiência dos filtros. Houve remoção de 97,43% do diclofenaco, 85,03% do ibuprofeno: 94,11% do naproxeno e 84,07% do paracetamol.The ecological filter represents a promising treatment technology, because this doesn't require the application of chemicals and is efficient. In it, is between living beings the relationship of the food chain. Initially an aqueous matrix was added to four drugs (diclofenac, naproxen, ibuprofen and paracetamol, and subsequently analyzed by high performance liquid chromatography to evaluate the removal of these compounds by ecological filter followed by granular activated carbon filter biologically active. The pharmacological compounds and parameters such as turbity, total and fecal coliforms, apparent color and true color were measured to evaluate the effectiveness of filters. There was removal of the drugs applied and the parameters measured. The percentages of removal were 97,43% of diclofenaco,85,03% of ibuprofen, 94,11% of naproxen and 84,07% of paracetamol.

  3. Avaliação das unidades de tratamento do lodo em uma ete de lodos ativados convencional submetida a distintas estratégias operacionais Evaluation of the sludge treatment units in an activated sludge treatment plant subjected to different operational strategies

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    Alessandra Valadares Álvares da Silva

    2007-06-01

    Full Text Available A finalidade deste trabalho é apresentar uma avaliação da etapa de tratamento de lodos da Estação de Tratamento de Esgotos do Arrudas (Belo Horizonte, em especial os teores de sólidos ao longo do sistema, as principais variáveis de projeto e operação. O processo de tratamento é o de lodos ativados convencional com adensamento por gravidade, digestão anaeróbia e desidratação mecânica. Desde sua entrada em operação até o momento, a estação passou por três fases operacionais quanto ao adensamento dos lodos. A maior concentração média do lodo primário (4,8% foi atingida no adensador por gravidade quando esse recebia apenas lodo primário. O lodo misto alcançou uma concentração média de 2,7% enquanto o valor esperado de projeto era 5,0%. O lodo secundário excedente, concentrado no adensador por gravidade não ultrapassou 1,8%. A maior concentração média da torta do lodo desidratado (28,3% foi obtida quando o lodo digerido era proveniente do tratamento primário.This paper aims to evaluate the sludge treatment stage at the Arrudas Wastewater Treatment Plant (Belo Horizonte, Brazil, especially the solids contents throughout the sludge treatment line, as well as the main design and operating variables. The conventional activated sludge plant has a typical solids-line flowsheet: gravity thickening, anaerobic digestion and mechanical dewatering. Three main operational phases have been identified, whose implications in the plant behaviour are analysed in the paper. The highest concentration of primary sludge (mean value of 4.8% was reached in the gravitational thickening when it was fed with primary sludge only. The mixed sludge concentrated in the gravitational thickening reached only a mean concentration of 2.7%, whereas the expected result was 5.0%. The excess secondary sludge concentrated in the gravitational thickener did not reach 1.8%. The largest concentration of the dewatered sludge cake (means value of 28.3% was

  4. Treatment of oil refinery effluent in a continuous reactor using Powdered Activated Carbon (PAC) in the activated sludge process; Tratamento de efluente de refinaria de petroleo em um reator continuo utilizando carvao ativado em po (CAP) no sistema de lodo ativado

    Energy Technology Data Exchange (ETDEWEB)

    Yokoyama, Lidia; Campos, Juacyara C.; Valle, Alexandre Ornellas do; Souza, Andre Lopes de [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Quimica

    2008-07-01

    The process of oil refining generates effluent containing toxic substances as high molecular weight hydrocarbons which have toxicity or are recalcitrant to biological degradation. This study examined the introduction of powdered activated carbon (PAC) in the system of activated sludge used to treat of oil refinery effluent. The process was conducted in two bioreactors continued, with a capacity of 2L: one to monitoring the performance of the activated sludge system without the addition of PAC and another to monitoring the performance of biological treatment using 2,0 g/L of PAC. The degradation of organic matter through activated sludge turned to physical adsorption associated with the addition of CAP promoted the values of COD reduction of 360 to 36 mg / L, which corresponds to an average of 90% of removal. It was also observed the reduction of the values of total organic carbon (TOC) of 285 to 86mg / L, which represents an increase of TOC removal of around 10 percentage points, which, probably, can be the portion of persistent organic matter that is not degraded by the biological system without CAP. (author)

  5. Avaliação da expressão do receptor tipo 2 ativado por protease (PAR2) e da atividade proteolítica presente no fluido crevicular de pacientes com periodontite crônica

    OpenAIRE

    José Américo Gonçalves Fagundes

    2010-01-01

    O receptor tipo 2 ativado por protease (PAR2) é um receptor pro-inflamatório que pode ser ativado por tripsina, triptase, protease 3 produzida pelo neutrófilo e pela gingipaína (produzida por Porphyromonas gingivalis). Objetivo: o objetivo do presente estudo foi investigar a expressão do PAR2 na periodontite crônica em humanos, e avaliar se esta expressão está relacionada com a presença de atividade proteolítica no fluido crevicular. Metodologia: foram coletadas amostras de fluido crevicular ...

  6. História em quadrinhos e a função poética na publicidade

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    Roberto Elísio dos Santos

    2015-08-01

    Full Text Available A relação entre a publicidade e as histórias em quadrinhos remonta ao início do século XX, quando as tiras publicadas em jornais atraíam a atenção crescente dos leitores. Partindoda função poética da linguagem, conforme a classificação feita pelo linguista russo Roman Jakobson, e seuuso na publicidade, este texto pretende categorizar as principais formas em que os quadrinhos atendem às necessidades de campanhas publicitárias. Por meio de elementos característicos da função poética da linguagem, os anúncios podem trazer informações úteis e manterem-se interessantes e vendáveis.

  7. Pré-filtração em pedregulho e filtração lenta com areia, manta não tecida e carvão ativado para polimento de efluentes domésticos tratados em leitos cultivados Pré-filtration in boulder and slow sand filtration with non-woven synthetic layers and granulated vegetal coal to improve quality in wastewater treated by constructed wetlands

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    José E. S. Paterniani

    2011-01-01

    Full Text Available O presente trabalho teve como objetivo comparar sistemas de filtragem, composto de pré-filtro de pedregulho seguido de filtro lento com o meio filtrante areia e no topo manta sintética não tecida e pré-filtro de pedregulho seguido de filtro lento com meio filtrante areia e carvão ativado granular e no topo manta sintética não tecida, para polimento de efluentes domésticos tratados em leitos cultivados, visando à aplicação na fertirrigação. Na comparação dos sistemas de filtragem, avaliou-se a eficiência de remoção dos parâmetros: sólidos em suspensão, turbidez, cor aparente, demanda química de oxigênio, oxigênio dissolvido, ferro, manganês, coliformes totais e E. coli. Os dois sistemas operavam 24 horas por dia, com a mesma taxa de aplicação, tratando uma vazão total final de 1,5 m³ dia-1, sendo que a taxa de aplicação para a unidade de pré-filtração era, em média, de 8,4 m³ m-2 dia-1 e para cada uma das unidades de filtração lenta era, em media, de 2,7 m³ m-2 dia-1. As unidades de pré-filtração e filtração lenta mostraram-se eficientes na redução das concentrações de sólidos suspensos, turbidez, cor aparente e DQO, como polimento de esgotos domésticos previamente tratados. O uso de carvão ativado granular, em combinação com areia, proporcionou ao filtro lento maior eficiência na remoção de sólidos suspensos, cor, turbidez, coliformes totais e E. Coli., sem com isso aumentar a perda de carga inicial. Existe a possibilidade de utilização dos efluentes para a prática da fertirrigação, sendo necessário o processo de desinfecção ou não, dependendo da cultura e o sistema de irrigação utilizado.The objective of this study was the comparison between two filtration systems, being one composed of a boulder pre-filter followed by a slow filter with sand as filtration media and a non-woven synthetic fabric in the upper part, and the other one composed of a boulder pre-filter followed by a

  8. Gênero poético: uma proposta em espiral para o ensino fundamental II

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    Norma Seltzer Goldstein

    2006-01-01

    Full Text Available Travailler la poesia a l’ecole devient particulierement interessant si l’on choisit un procede “en spirale”. Dans ce sens, voila comment ce texte propose de travailler le poème dans le “ensino fudamental ii bresilien” (eleves de 11 a 14 ans: I lecture et reconnaissance des caracteristiques des poèmes reguliers et irreguliers, a 11 et 12 ans; II prose poetique et poème en prose, a 13 ans; iii poèmes visuels, a 14 ans. Ce travail doit considerer qu’ en situation scolaire l’enseignement doit toujours se faire en contexte.

  9. Počítačem řízený PLL syntezátor

    OpenAIRE

    Málek, Miroslav

    2011-01-01

    Cílem této práce je realizovat počítačem řízený PLL syntezátor využívající rozhraní USB. Pro připojení PLL syntezátoru k počítači byl použit integrovaný obvod FT232RL. Následně byl vyvinut obslužný software pro programování registrů integrovaného obvodu ADF4110. The aim of this bachelor´s thesis is a practical realization of computer controlled PLL synthesizer using USB serial port. FT232RL was used as an interface between the PLL synthesizer ADF4110 and PC. A software with graphical user ...

  10. Badger <em>Meles melesem> and Fox <em>Vulpes vulpesem> food in agricultural land in the western Po Plain (Italy

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    Luca Canova

    1994-05-01

    Full Text Available Abstract Fox and badger diets were studied by means of scat analysis in agricultural land in northern Italy. Earthworms and corn were the staple food for the badger, while foxes fed mainly on animal food (birds and mammals. Dietary overlap between the two species was low. Fox diets were substantially similar to those in north-central Europe and other areas of Italy. Badger diets differed from those in mediterranean areas of Italy and were similar to diets of north European populations. Riassunto Alimentazione di Tasso <em>Meles melesem> e Volpe <em>Vulpes vulpesem> in aree agricole della Pianura Padana occidentale - La dieta di tasso e volpe in un'area agricola della Pianura Padana occidentale è stata studiata mediante analisi delle feci. Lombrichi e mais rappresentano la principale fonte alimentare per il tasso, mentre la dieta della volpe è basata prevalentemente su uccelli e mammiferi. La sovrapposizione alimentare fra le due specie è ridotta. La dieta della volpe è simile a quella delle popolazioni dell'Europa centrale e settentrionale; la dieta del tasso differisce nettamente da quella delle popolazioni italiane che vivono in ambiente mediterraneo.

  11. Poema em prosa: poética da pequena reflexão Prose poem: the poetry of small reflections

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    Fernando Paixão

    2012-12-01

    Full Text Available Gênero criado por Baudelaire em meados do século XIX, o poema em prosa tornou-se uma terceira via da modernidade literária, a ponto de suscitar uma trajetória e tradição próprias desde então. O presente ensaio procura posicionar o impasse desse tipo de escrita, apontado por Suzzanne Bernard, ante o exaurimento das vanguardas ocorrido após o fim da Segunda Guerra. Como resposta ao dilema da expressividade poética, vale a pena atentar para uma linhagem de textos contemporâneos que revelam algumas características em comum. Inspirados por forte carga subjetiva, eles apresentam uma linguagem despida de requintes e próxima da anotação íntima: mas com alta dose de reflexão.The prose poem, a literary genre created by Baudelaire in the mid-19th century, became a third way for modern literature and has even established its own trajectory and tradition since then. Our essay seeks to ascertain the impasse of this kind of writing, as pointed out by Suzzanne Bernard, brought about by the depletion of the avant-garde movements after the end of World War II. As a response to the dilemma of poetic expressiveness, we would do well to pay attention to a lineage of contemporary texts that bear certain common characteristics. Inspired by a strong subjective tone, they display an unpolished language, bordering on intimate annotations, but with a high dose of reflection nevertheless.

  12. Análise da biodegradação dos componentes do óleo cítrico por CG/EM e análise da população microbiana de um reator de lodo ativado no tratamento de água residuária de uma indústria cítrica Analysis of biodegradation of citric oil compounds by GC/MSD and analysis of the microbial population of an activated sludge reactor in the treatment of a citric wastewater

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    Alexandre Nunes Ponezi

    2005-12-01

    Full Text Available Água residuária da indústria cítrica foi utilizada como objeto de estudo de biodegradação através de um sistema de lodo ativado por batelada. As análises realizadas por CG/EM mostraram que os compostos provenientes do óleo de laranja como o limoneno, foram resistentes a biodegradação. A avaliação microbiológica realizada no decorrer do período mostrou que o número e tipo de colônias bacterianas variaram de acordo com o tempo, e pode ser observada uma sucessão de microrganismos durante a biodegradação do efluente cítrico. O microrganismo identificado como LAB-9 (Pseudomonas struzieri e LAB-7 (não identificado prevaleceram durante todo o processo, sugerindo que estes são organismos importantes para remoção da matéria orgânica no processo ou são melhores adaptados ao tipo de água residuária. O sistema de lodo ativado foi eficiente na redução de DBO e DQO, alcançando valores de 79 e 78% respectivamente, num período de 15 h de reação, com uma relação F/M 4:2.Wastewater from citric industry was used to biodegradation study through an activated sludge system. The analyses accomplished by CG/MSD showed that compounds of the orange oil as the limoneno, was resistant to biodegradation. The microbiological evaluation developed during the biodegradation period showed that the number and type of bacteria present in the system varied according to the time, and a succession of microorganisms can be observed. The microrganism identified as LAB-9 (Pseudomonas struzieri and LAB-7 (not identified prevailed during whole the process, suggesting that they were the main responsible for the removal of the organic matter or the better adapted to the type of wastewater. The system of activated sludge was efficient in the reduction of DBO and DQO, reaching values of 79 and 78%, respectively, in a period of 15 h, with a relationship F/M 4:2.

  13. Determination of {sup 210}Pb and {sup 210}Po in cigarette tobacco; Determinacao de {sup 210}Pb e {sup 210}Po em tabaco de cigarros nacionais

    Energy Technology Data Exchange (ETDEWEB)

    Peres, Ana Claudia

    1999-07-01

    Cigarette smoking is one of the important pathways that could contribute to enhance the radiation dose to man, due to the relatively large concentrations of {sup 210}Pb and {sup 210}Po found in tobacco leaves. In this work, concentrations of these two radionuclides were determined in eight of the most commercialized cigarette brands produced in Brazil. The samples analyzed were bought randomly in the market. The {sup 210}Pb was determined by counting the beta activity of the {sup 210}Bi in a gas flow proportional detector, after radiochemical separation and precipitation of the PbCr0{sub 4}. The {sup 210}Po was determined by alpha spectrometry, using a surface barrier detector, after radiochemical separation and spontaneous deposition of Po in copper disk. The results showed concentrations ranging from 11,9 to 30,2 mBq per gram of dry tobacco for {sup 210}Pb and from 10,9 to 27,4 mBq per gram of dry tobacco for {sup 210}Po. (author)

  14. Estudo de poços parabólicos largos de AIGaAs em campos magnéticos altos

    OpenAIRE

    Angela María Ortiz de Zevallos Márquez

    2007-01-01

    Neste trabalho, apresentamos os resultados de estudos com poços quânticos parabólicos (PQW, Parabolic Quantum Well ) de AlGaAs crescidos sobre substratos de GaAs pela técnica de epitaxia por feixe molecular. Medidas de transporte em PQWs do tipo n e do tipo p com larguras de 1000 ºA ate 4000 ºA em baixas temperaturas indicam um aumento abrupto do coeficiente Hall para um campo magnético critico de aproximadamente 3 T. Nosso estudo concentra-se na interpretação deste aumento observado. Com est...

  15. Em busca do sagrado. O ritual da criação poética em “Cara-de-Bronze”

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    L. Thomaz Corà

    2012-08-01

    Full Text Available ENThe present reflection, that takes JoãoGuimarães Rosa’s narrative “Cara-de-Bronze” as its corpus, exposes the issue of transforming the symbolic Middle Age into a literary mythic Outback, whose discursive articulation, understood as a symbolic level, describes the search of sacred as the poetic creation’s ritual. When this creation is built in two possible levels of fiction, it generates a mythic-symbolic scene, whose structure is presented in the text as the ritual of going back to sacred origins, which is an endless ritual. Such an aspect can be situated in both human and discursive instances. Keywords: Culture. Guimarães Rosa. Symbolic level. Poetry.PTEsta reflexão, que toma como corpusa narrativa “Cara-de-Bronze, de João Guimarães Rosa, evidencia a questão da transubstanciação da Idade Média simbólica em Sertão mítico literário, cuja articulação discursiva, entendida como plano simbólico, delineia a busca do sagrado como ritual de criação poética. Tal criação, ao se edificar em dois níveis ficcionais possíveis, deflagra uma encenação mítico-simbólica, cuja estrutura inscreve o ritual de eterno retorno às origens sagradas, seja na instância do humano, seja na do discurso.Palavras-chave: Cultura. Guimarães Rosa. Plano simbólico. Poesia.

  16. In vitro evaluation of dental bleaching effectiveness using hybrid lights activation = Avaliação in vitro da eficácia da fotoativação no clareamento dental utilizando a técnica em consultório

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    Araújo, Rodrigo Maximo de

    2010-01-01

    Full Text Available Objetivo: Avaliar se fontes de luz aumentam a eficácia do peróxido de hidrogênio na técnica de clareamento profissional. Metodologia: Foram empregados 60 dentes incisivos bovinos, com dimensões coronárias e radiculares padronizadas a partir do limite amelo-cementário, sendo descartada a porção lingual. Os corpos-de-prova (cp foram limpos em ultra-som por 20 min e a dentina condicionada com H3PO4 a 38% por 15 s, sendo os (cp imersos em solução de café solúvel a 25% por duas semanas. A dentina foi impermeabilizada com esmalte e os (cp divididos em 5 grupos, sendo a cor inicial mensurada através do espectofotômetro-EasyShade (VITA. Todos os (cp receberam três aplicações por 10 min do gel clareador Opalescence Xtra-Boost (Ultradent conforme segue: Grupo 1 – controle, não recebeu fotoativação, Grupo 2 – ativado com luz halôgena, Grupo 3 – ativado com LED azul/LASER, Grupo 4 – ativado com LED verde/LASER e Grupo 5 – ativado com LED vermelho. Após o clareamento foi mensurada a variação de cor ?E, ?a*, ?b*e ?L* e as referentes à escala de cor Vita Clássico. Os dados foram submetidos à análise de variância, teste de Tukey e de Dunn (a=5%. Resultados: A diferença geral da cor foi reduzida quando se empregou LED Azul e Luz Halógena, sendo que o desempenho do peróxido de hidrogênio a 38 % foi intensificado dependendo da fonte de luz utilizada. A avaliação quantitativa de cor, obtida por espectrofotômetro e pela escala de cor Vita Clássico, foram coincidentes. Conclusão: O tipo de fonte de luz empregada interfere na eficácia do agente clareador

  17. Guimarães Rosa, colecionador de palavras – uma leitura da poética das listas, em Grande sertão: veredas

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    Ivana Ferrante Rebello

    2017-05-01

    Full Text Available A escrita de Grande sertão: veredas, de Guimarães Rosa, apresenta uma série de listas, superpostas, que contribuem para conferir ao romance movimento e musicalidade. A partir das reflexões de Umberto Eco, em A vertigem das listas (2010, este artigo analisa o efeito poético das listas que compõem a escrita do romance. Enumerações de palavras, ditos populares, nomes de plantas e animais compõem as listas que estão presentes nas cadernetas do autor. Essas listas, que serviram de suporte à escrita inventiva do autor, também aparecem de forma abundante em sua ficção. Propomos, no presente estudo, uma reflexão acerca das imagens, da musicalidade e do ritmo que as listas superpostas conferem ao romance.

  18. Memórias Poéticas da Cidade: a Fenomenologia dos Espaços em Fervor de Buenos Aires, de Jorge Luis Borges

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    Ana Paula Santos de Araújo Ferreira

    2016-12-01

    Full Text Available O presente artigo constitui-se de uma análise fenomenológica da poética de Jorge Luis Borges, mais especificamente, dos poemas que privilegiam as relações entre tempo, espaço e memória em seu primeiro livro de poesias, intitulado Fervor de Buenos Aires (1923. Partindo da análise do espaço enquanto categoria literária que transcende a mera função de cenário, investigamos suas configurações nos poemas que compõem o corpus deste trabalho, tendo como aporte teórico as perspectivas de Mikhail Bakhtin (2002, sobre o cronotopo literário, de Gaston Bachelard (2008, sobre o valor poético dos espaços representados, e de Ozíris Borges Filho (2007, a respeito da espacialidade na obra literária. Nesse sentido, após delimitar teoricamente os conceitos de espaço e o método fenomenológico dos quais lançamos mão nesse estudo, daremos prosseguimento à investigação das memórias poéticas plasmadas nos espaços citadinos representados na obra, tais como as ruas, as praças, a casa e a sala.

  19. Uso de filtros de carvão ativado granular associado a microrganismos para remoção de fármacos no tratamento de água de abastecimento

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    Rívea Medri Borges

    Full Text Available RESUMO O modo de vida das sociedades modernas originou o aporte diário, nos ambientes aquáticos, de fármacos e outras inúmeras moléculas de uso contínuo, compostos emergentes, com potencial de risco à saúde humana principalmente pela exposição em razão da inevitável contaminação dos mananciais de abastecimento de água e da transferência para as estações de tratamento de água (ETA, onde não são removidos. O uso de carvão ativado granular na filtração demonstra ser uma opção viável para ETA, porém, uma eficiência satisfatória requer regeneração periódica do material, onerando o tratamento. Contudo, observa-se que em baixas taxas de filtração a colonização natural dos filtros por microrganismos - formação de biofilme - pode ser uma alternativa para aumentar o tempo de vida útil do carvão, bem como para decompor essas moléculas complexas em elementos minerais assimiláveis, reintroduzindo-os nos ciclos biogeoquímicos naturais. Este trabalho avaliou, durante 24 semanas, em condições de laboratório, o carvão ativado com biofilme como meio filtrante para remoção dos fármacos: diclofenaco de sódio, ibuprofeno, naproxeno e amoxicilina; experimentou em sistema batch o potencial dos microrganismos colonizadores de filtros em degradar os fármacos testados, assim como identificou filogeneticamente os microrganismos predominantes na biodegradação. Os resultados demonstram a remoção dos fármacos acima de 80%. Constatou-se a presença das bactérias dos gêneros Bacillus , Burkholderia , Cupriavidus , Pseudomonas , Shinella , e Sphingomonas . Este estudo permite inferir a capacidade de remoção de fármacos por bactérias presentes em filtros de carvão ativado e o possível uso dessa tecnologia como alternativa de controle e remoção dessas substâncias no tratamento de água potável.

  20. Poeta-adivinho em Teogonia e Trabalhos e dias: o futuro no discurso poético hesiódico

    OpenAIRE

    Werner, Christian; Evangelista Lopes, Caroline

    2014-01-01

    Discute-se a interface entre discursos poéticos e proféticos e a área de atuação de seus respectivos especialistas, na Grécia arcaica, a partir de uma análise de certas passagens dos poemas Teogonia e Trabalhos e dias de Hesíodo. O enfoque é a afirmação, na Teogonia, que a consagração do poeta pelas Musas, ou seja, sua união com uma realidade sagrada, lhe permite celebrar o futuro. A afirmação é discutida através da interpretação de passagens em Trabalhos e dias.

  1. Contribuições da poética social à pesquisa em psicoterapia de grupo Contributions of social poesis to group psychotherapy research

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    Carla Guanaes

    2008-08-01

    Full Text Available Esse artigo tem por objetivo apresentar algumas contribuições do construcionismo social e da poética social ao entendimento da psicoterapia de grupo e de sua investigação científica. O construcionismo social se define como uma forma alternativa de inteligibilidade em ciência, que privilegia a compreensão do modo como as pessoas constroem sentidos sobre o mundo e sobre si mesmas em suas práticas discursivas. Coerente com essa perspectiva, a poética social caracteriza uma prática de pesquisa útil à investigação dos processos conversacionais, enfatizando a centralidade do pesquisador na construção de sentidos sobre seu objeto de estudo. Nesse artigo, buscamos demonstrar como estas perspectivas podem sustentar uma prática sistemática de pesquisa sobre a psicoterapia de grupo. Para tanto, apresenta os passos metodológicos desenvolvidos em um estudo acerca de um grupo em saúde mental, demonstrando como esses permitiram compreender o processo conversacional por meio do qual o próprio grupo se constituiu como um recurso terapêutico.The objective of this article is to describe some contributions of social constructionism and social poesis in the description of group psychotherapy and its scientific investigation. Social constructionism is an alternative form of intelligibility in science, which focuses on the comprehension of the way people make sense of the world and of themselves in their discursive practices. Concurrent with this perspective, social poesis can be described as a research practice that is useful in investigating the conversational processes, emphasizing the centrality of the researcher in the construction of meanings about its object of study. In this article, we aim to describe how these perspectives can sustain a systematic research practice of group psychotherapy. Thus, we describe some methodological steps developed in a study about a group in a mental health setting, showing how they helped us to comprehend

  2. Efeito da nicotina sobre fagócitos ativados - doi: 10.4025/actascihealthsci.v35i1.11129 Effect of the nicotine on actived phagocytes - doi: 10.4025/actascihealthsci.v35i1.11129

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    Rubiana Mara Mainardes

    2013-03-01

    Full Text Available Indivíduos fumantes apresentam aumento na proporção de leucócitos polimorfonucleares (LPMN, como por exemplo, no tecido pulmonar, resultando em aumento nos níveis de enzimas proteolíticas e espécies reativas de oxigênio, que ocasionam efeito destrutivo na matriz celular e contribuem para a progressão da doença pulmonar, além de favorecer o aparecimento de infecções microbianas, e determinam que as células fagocíticas estejam em frequente estado de ativação (fagocitose. Neste trabalho, avaliou-se a influência da nicotina (NIC sobre a viabilidade de LPMN e macrófagos ativados ou não, pelos estímulos zymosan e acetato de forbol miristato. Os resultados indicaram que a NIC promove aumento na viabilidade de LPMN e macrófagos ativados em relação a essas células ativadas sem a presença de NIC, avaliada ‘ex vivo’ pelo teste de exclusão do azul de trypan. Esse efeito foi significativamente mais pronunciado sobre LPMN que sobre os macrófagos. Essa redução na citotoxicidade favorece a sobrevida da célula, podendo exacerbar os seus efeitos deletérios, especialmente em no seu estado ativado, pela maior produção de espécies reativas de oxigênio.  Smokers show increased rates of polymorphonuclear leukocytes (PMNL, including in pulmonary tissue, resulting increased levels of proteolytic enzymes and reactive oxygen species, which have a destructive effect on the cellular matrix and contribute to the progression of pulmonary disease, in addition to promoting the onset of microbial infections which cause phagocytic cells to be in a state of frequent activation (phagocytosis. This work evaluated the influence of nicotine (NIC on the viability of PMNL and macrophages (activated or not, by stimuli zymosan and phorbol myristate acetate. The results indicated that NIC led to increased viability of PMNL and activated macrophages compared to these cells activated without NIC, measured ex vivo by trypan blue exclusion test. This

  3. Teoria da informação e concepção poética em Salette Tavares

    OpenAIRE

    Torres, Rui; Santos e Silva, Débora Cristina

    2010-01-01

    Um dos contributos mais significativos do experimentalismo literário português do século XX foi a atitude auto-reflexiva do fazer poético. Na esteira de outros precursores, muitos poetas se ocuparam de traçar as bases teóricas das suas concepções estéticas. é este o caso de Salette Tavares, cuja actividade intelectual, intensa e dinâmica, premiou o acervo da literatura experimental portuguesa com textos teóricos relevantes. Neste artigo, apresentamos as considerações da autora a r...

  4. Analysis of the microtensile bond strength to enamel of two adhesive systems polymerized by halogen light or LED Análise da microtração em esmalte de dois sistemas adesivos ativados por LED ou por luz halógena

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    Ana Paula Morales Cobra Carvalho

    2005-12-01

    Full Text Available With the development of composite resin polymerization techniques, LEDs were introduced to the market place. Based on the studied literature, the aim of this study was to evaluate, through microtensile testing, the bond strength to enamel of a composite resin associated to a conventional (multi-bottle adhesive system or to a self etching primer adhesive system, polymerized by halogen light or LED (light emitting diode. Bovine teeth were divided into 4 groups with 10 teeth each (n = 10. Then the adhesives Scotchbond Multipurpose Plus (3M-ESPE and Clearfil SE Bond (Kuraray were applied following the manufacturers’ instructions. Both systems were polymerized for 10 s by halogen light (Degulux Soft Start - Degussa Hulls set at 550 mW/cm² or by LED (Kerr Demetron set at 600 mW/cm². The composite resin Filtek Z-250 was applied in four 1 mm increments with the aid of a square, condensation silicon, 5 mm x 5 mm matrix, and polymerized by either of light sources for 40 s. Scotchbond Multipurpose Plus polymerized by halogen light presented the highest bond strength values (39.69 ± 7.07 MPa, and the other groups did not present statistically significant differences: Scotchbond Multipurpose Plus polymerized by LED (22.28 ± 2.63 MPa, Clearfil SE Bond polymerized by halogen light (27.82 ± 2.65 MPa and by LED (22.89 ± 5.09 MPa.Com a grande busca pelo desenvolvimento das técnicas de polimerização das resinas compostas e dos sistemas adesivos, foram introduzidos no mercado os LEDs. Com base na literatura estudada, neste trabalho é avaliada a força de união da resina composta ao esmalte associado a um sistema adesivo convencional e a um sistema autocondicionante polimerizados por luz halógena e LED, por meio do teste de microtração. Os dentes bovinos foram divididos em 4 grupos com 10 dentes em cada um (n = 10, para aplicação do adesivo Scotchbond Multipurpose Plus (3M-ESPE e do Clearfil SE Bond (Kuraray conforme orientação do fabricante

  5. Poéticas e amores em processo : canções de Dolores Duran, Joyce Moreno e Alice Ruiz

    OpenAIRE

    Mirele Carolina Werneque Jacomel

    2012-01-01

    Esta pesquisa apresenta uma análise das interseções entre as práticas amorosas representadas nas canções de Dolores Duran, Joyce Moreno e Alice Ruiz. O objetivo principal é problematizar as experiências culturais, discursivas e estéticas de cada compositora como expressões da modernidade e do papel social que desempenham as mulheres, em diferentes momentos da segunda metade do século XX. Foi necessário perscrutar as mudanças socioculturais desse mesmo período para se compreender em que medida...

  6. Invenção de Orfeu, colagem poética e onirismo em Jorge de Lima

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    LUCIANO MARCOS DIAS CAVALCANTI

    2015-08-01

    Full Text Available Este texto pretende examinar o recurso da montagem e do onirismo, procedimentos estéticos provenientes do surrealismo, utilizados por Jorge de Lima na confecção de suas fotomontagens e em Invenção de Orfeu.

  7. Radionuclides incorporation in activated natural nanotubes; Incorporacao de radionuclideos em nanotubos naturais ativados

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jose Parra

    2016-11-01

    Natural palygorskite nanotubes show suitable physical and chemical properties and characteristics to be use as potential nanosorbent and immobilization matrix for the concentration and solidification of radionuclides present in nuclear wastes. In the development process of materials with sorption properties for the incorporation and subsequent immobilization of radionuclides, the most important steps are related with the generation of active sites simultaneously to the increase of the specific surface area and suitable heat treatment to producing the structural folding. This study evaluated the determining parameters and conditions for the activation process of the natural palygorskite nanotubes aiming at the sorption of radionuclides in the nanotubes structure and subsequent evaluation of the parameters involve in the structural folding by heat treatments. The optimized results about the maximum sorption capacity of nickel in activated natural nanotubes show that these structures are apt and suitable for incorporation of radionuclides similar to nickel. By this study is verified that the optimization of the acid activation process is fundamental to improve the sorption capacities for specifics radionuclides by activated natural nanotubes. Acid activation condition optimized maintaining structural integrity was able to remove around 33.3 wt.% of magnesium cations, equivalent to 6.30·10{sup -4} g·mol{sup -1}, increasing in 42.8% the specific surface area and incorporating the same molar concentration of nickel present in the liquid radioactive waste at 80 min. (author)

  8. Uso de fator VII recombinante ativado para tratamento e profilaxia de grandes sangramentos Use of recombinant activated factor VII for treatment and prophylaxis of major bleeding

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    Flávio Augusto Henriques Vince

    2009-09-01

    Full Text Available INTRODUÇÃO: O fator VII recombinante ativado (rFVIIa é uma proteína produzida por engenharia genética, cuja estrutura é muito semelhante à do fator VII intrínseco ativado (FVII. Sua ação se baseia no conhecimento do mecanismo de coagulação in vivo agindo na ativação direta do fator X resultando em formação independente de trombina no local da lesão e contribuindo dessa forma para formação de coágulo estável de fibrina sem a ação dos fatores VIII e IX. MÉTODOS: Foi realizada ampla revisão da literatura com o objetivo de determinar os achados recentes relacionados ao uso de fator VII recombinante ativado em pacientes com sangramento severo. RESULTADOS: Constatou-se que o uso de rFVIIa foi iniciado na década de 80 para profilaxia e tratamento de sangramento em pacientes com antecedente de hemofilia A ou B com inibidores de fator VIII e IX, deficiência de fator VII e trombastenia de Glanzmann refratários à reposição plaquetária. Em 1999 seu uso foi ampliado para outras situações clínicas e dessa forma, começaram a ser publicados diversos trabalhos mostrando a eficácia do rFVIIa como agente pró-hemostático em paciente com outras coagulopatias ou pacientes previamente hígidos com história de sangramento agudo de grande monta. Trauma é a principal causa de mortalidade no mundo sendo sangramento incontrolado o principal desafio no atendimento a estes pacientes. É comum a associação de trauma com coagulopatia, necessitando em algumas situações de terapia específica para o tratamento da mesma. Neste momento a terapia adjuvante com rFVIIa deve ser considerada. Outras causas comuns de sangramento são as operações cardíacas e ginecológicas/ obstétricas e doenças envolvendo o fígado. A coagulopatia nesses casos ocorre por deficiência dos fatores dependentes de vitamina K, sendo o FVII o com menor meia-vida. CONCLUSÃO: O uso de rFVIIa tem sido sugerido como opção terapêutica promissora para esses

  9. A estrutura do sub-bosque de povoamentos homogêneos de Mimosa scabrella bentham, em área minerada, em Poços de Caldas, MG

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    Mauro Eloi Nappo

    2000-01-01

    Full Text Available A floristic and structural survey of the natural regeneration of shrubby and arboreal species of the understory of an established homogeneous plantation of Mimosa scabrella Bentham was corried out viewing, the reclamation of a mined area, in Poços de Caldas, Minas Gerais State, Brazil. Nineteen plots of 50 m2 (5 m × 10 m were used and the shrubby and arboreal individuals measuring equal or above 30 cm were sampled and 1,946 individuals belonging to 63 botanic families were found. Soil samples were collected at a depth of 0 to 20 cm, in each of the 19 plots, and the contents of sand, silt,clay, organic matters, pH nitrogen, phosphorus, potassium, calcium and magnesium were analysed. The influence of the soil variables upon the density of the sampled species was analysed using the Canonical Correspondence Analysis (CCA. A significative correlation was verified among these variables at a level of 5% of probability using the Monte Carlo test. The species Miconia sellowiana, Miconia pepericarpa, Cestrum amictum, Alchornea triplinervia, Cordia superba and Casearia sylvestris presented a close to indifferent behaviour in relation to the soil variables studied, and these species largely surpassed the other species in relation to the floristic and the strutured parameters. This behaviour reinforces the indication of the species, made by NAPPO (1999, as having a potential for use in mixed and enrichment plantation in condition similar to those of the studied area. The identification and mensuration of the enviromental variables and of the history of the area are important pieces for the understanding of the process of population dynamics, and particularly, for degraded area getting to the reclamation phase.

  10. Efeito da interação entre carvão ativado e N6-benzilaminopurina na propagação in vitro de bananeira, cv. Grand Naine (AAA Interaction effect between activated charcoal and N6-benzylaminopurine in the in vitro propagation of banana, cultivar Grand Naine (AAA

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    Frederico Henrique da Silva Costa

    2006-08-01

    Full Text Available O carvão ativado possui a propriedade de adsorver os compostos fenólicos liberados pela oxidação dos tecidos lesionados durante o cultivo in vitro. O objetivo deste trabalho foi avaliar os efeitos da interação entre o carvão ativado e diferentes concentrações de N6-benzilaminopurina (BAP na multiplicação in vitro da bananeira, cv. Grande Naine (AAA. O meio de cultura utilizado foi o MS, solidificado com 5 g.L-1 de ágar. O cultivo foi mantido em sala de crescimento a 25±2ºC, fotoperíodo de 16 horas e intensidade luminosa de 30 mmol.m-2s-1. Foram avaliadas a presença e a ausência de carvão ativado (0 e 3 g.L-1 e quatro concentrações de BAP (0; 2; 4 e 6 mg.L-1 no meio de cultura. O delineamento foi inteiramente casualizado, com cinco repetições, em um sistema fatorial 2x4. Os explantes foram avaliados a cada 30 dias, por um período de quatro subcultivos. Após cada subcultivo, o comprimento de brotações, a taxa de multiplicação, o vigor, o nível de oxidação das brotações emitidas e o número de raízes formadas foram avaliados. Independentemente das concentrações de BAP, o carvão ativado influenciou significativamente em todas as variáveis analisadas. De maneira geral, a adição de carvão ativado afetou negativamente a taxa de multiplicação, embora tenha melhorado o vigor e o número de raízes e diminuído a oxidação dos explantes. Na ausência de carvão ativado, o BAP proporcionou as maiores taxas de multiplicação das brotações.Active charcoal has the capacity to fix phenolic compounds released by the oxidation of manipulated tissues during in vitro cultivation. The present work objective was to evaluate the interaction effects between active charcoal, combined to different BAP concentrations in the in vitro banana propagation, cv. Grand Nain (AAA. The culture medium used was the MS, solidified with 5 g.L-1 agar. Cultures were kept in a growth room at 25 ± 2ºC with a photoperiod of 16 h at 30 mmol

  11. Incidência de pragas e doenças em agroecossistemas de café orgânico de agricultores familiares em Poço Fundo-MG Incidence of plagues and diseases in agroecossystems of organic coffee of familiar farmers in Poço Fundo-MG

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    Márcia Martins

    2004-12-01

    Full Text Available Objetivando-se determinar a incidência de pragas Leucoptera coffeella (GUÉRIN-MENÉVILLE, 1842 e Hypothenemus hampei (FERRARI, 1867 e doenças Hemileia vastatrix (BERK e BROOME, 1869 e Cercospora coffeicola (BERK e CURTIS, 1880, durante o período de janeiro de 2001 a dezembro de 2002, foram selecionados três agroecossistemas com produção de café orgânico conduzidos por agricultores familiares do município de Poço Fundo-MG. O agroecossistema I possui 2.200 pés da cultivar 'Catuaí Vermelho' em espaçamento 2,5 x 1,3 m (0,72 ha. O agroecossistema II possui 2.000 pés ('Catuaí Vermelho' em espaçamento 2,8 x 1,0 m (0,56 ha. O agroecossistema III possui 1.100 pés ('Icatu Amarelo' em espaçamento 3,0 x 0,9 m (0,36 ha. A determinação da incidência de L. coffeella, C. coffeicola e H. vastatrix foi realizada mediante levantamentos mensais. A determinação da infecção por C. coffeicola em frutos foi realizada nos meses de abril, maio e junho de 2001 e 2002. O levantamento da infestação por H. hampei foi realizado nos meses de janeiro a junho/julho de cada ano. Determinou-se que a infestação por L. coffeella ultrapassou 20% no terço superior (principalmente no período seco. A infestação por H. hampei atingiu o nível de dano somente no agroecossistema I, em 2001, e no agroecossistema III, em 2002. A infecção por H. vastatrix no agroecossistema III não atingiu nível de dano em conseqüência da tolerância da cultivar ('Icatu' à infecção por esse fungo; porém, nos agroecossistemas I e II ('Catuaí Vermelho', a infecção na lavoura ultrapassou o nível de 10% (principalmente no período seco. A infecção por C. coffeicola em folhas e frutos atingiu níveis elevados (período seco. A produtividade do agroecossistema I, em 2001, foi de 510 Kg ha-1 e, em 2002, de 2.340 Kg ha-1; no agroecossistema II, em 2001, foi de 420 Kg ha-1 e, em 2002, de 1.290 Kg ha-1; e, no agroecossistema III, foi praticamente zero, em 2001, e em

  12. Concentrações de citocinina e carvão ativado na micropropagação de pimenta-do-reino Cytokynin concentrations and activated charcoal on black pepper micropropagation

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    Elisa Ferreira Moura

    2008-02-01

    Full Text Available A pimenta-do-reino (Piper nigrum tem grande importância para a economia do Norte do Brasil. A pimenta-do-reino é propagada principalmente por estaquia que, além de ser pouco eficiente, pode possibilitar a propagação da doença fusariose. Dessa forma, testes para verificar a eficiência da micropropagação são pertinentes. O objetivo do trabalho foi testar concentrações de BAP - 6-benzilaminopurina (0,5, 1,5, 3,0 e 4,5mg L-1 e a adição de carvão ativado a 0,2% ao meio de cultura na micropropagação de pimenta-do-reino. O meio de cultura foi composto de sais e vitaminas de Murashige & Skoog, 3% de sacarose e 8g L-1 de ágar. Foram utilizados como explantes ápices caulinares de plântulas da cultivar "Bragantina" germinadas in vitro. Os tratamentos foram avaliados em esquema fatorial 4x2, em delineamento inteiramente casualizado. Após 45 dias no estabelecimento, foi avaliado o número de brotos, mas não foi observada diferença significativa entre os tratamentos, considerando-se os dois fatores e a interação entre eles. Após 45 dias no primeiro subcultivo, foram avaliados o número de brotos e de explantes (segmentos nodais. A interação entre BAP e carvão ativado teve efeito significativo para número de brotos e de explantes, sendo que o carvão influenciou o efeito das concentrações de BAP. A concentração de 0,5mg L-1 de BAP na ausência de carvão ativado gerou maior número de brotos e de explantes. O carvão ativado não é necessário na fase de proliferação de gemas de pimenta-do-reino da cultivar "Bragantina".Black pepper (Piper nigrum has great importance for the Northern Brazil’s economy. Black pepper is mainly propagated by mass propagation, which is not very efficient and may spread fusariosis. Thus, micropropagation efficiency tests are pertinent. The objective of this research paper was to test BAP - 6-benzilaminopurine concentrations (0.5, 1.5, 3.0 and 4.5mg L-1 and activated charcoal at 0.2% addition to

  13. Uma poética do silêncio: trauma, representação e linguagem em "Fuga da morte", de Paul Celan

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    Maria Esther Torinho

    2014-10-01

    Full Text Available http://dx.doi.org/10.5007/2175-7917.2014v19n2p107 No poema Fuga da morte, Paul Celan nos apresenta situações vivenciadas por ele mesmo em um campo de concentração nazista, o que insere o poema no contexto da Literatura de testemunho; trata-se de um poema imbuído de alta carga dramática, no qual conteúdo e forma aliam-se para oferecer uma leitura densa, carregada de significado. Pode-se perceber, no poema, que o silêncio comanda a cena, exprimindo, por meio das diversas lacunas deixadas por uma linguagem fragmentada, aquilo que é difícil para o poeta exprimir, o que é indizível, o que leva o leitor a um sentimento de estranheza, apossando-se da significação apenas por etapas e por entre as lacunas. Este artigo aborda o poema a partir de conceitos relativos à Literatura de testemunho e a impossibilidade de representar o real (Roland Barthes; no plano formal, além de conceitos de Mikhail Bakhtin e de Barros e Fiorin sobre polifonia, dialogismo e interdiscursividade; além disso, partindo do conceito musical de fuga, conforme sugerido pelo título do poema e evidenciado no texto, é abordada a linguagem figurada – metáforas e metonímias, ironia e elipses, como estratégias do autor para enfrentar a aporia entre trauma e representação, tendo-se assim, uma poética do silêncio, nos quais as elipses e as metáforas adquirem papel fundamental.

  14. Dinâmica da estrutura fitossociológica da regeneração natural em sub-bosque de Mimosa scabrella Bentham em área minerada, em Poços de Caldas, MG Phytosociology structure dynamics of natural regeneration in understory of Mimosa scabrella Bentham in mined area, Poços de Caldas, Brazil

    Directory of Open Access Journals (Sweden)

    Mauro Eloi Nappo

    2004-12-01

    Full Text Available Como estratégia de reabilitação de área minerada foram realizados, no ano agrícola 1982/1983, hidrossemeadura de gramíneas e leguminosa e o plantio puro de Mimosa scabrella Bentham em Poços de Caldas, MG. Em 1997 foi implantado um conjunto de 19 parcelas permanentes de 50 m² nessa área, para caracterização inicial do processo de regeneração natural. Em 2000, foi realizado o segundo inventário nas parcelas, para caracterização do processo de dinâmica da regeneração natural, que é o objeto deste trabalho. O processo de dinâmica da regeneração natural foi caracterizado mediante análises quantitativas e qualitativas da composição florística e da estrutura horizontal e vertical. O povoamento florestal do Retiro-Branco está sobre intensa atividade de estruturação, caracterizando o estágio inicial do processo de sucessão. O declínio do povoamento puro de Mimosa escabrella está modificando a ordem anteriormente estabelecida para o processo de sucessão da área, provocando a diversificação de condições de sítio e, assim, selecionando a ocupação deste em função dos grupos ecológicos, sendo as espécies pioneiras as mais favorecidas. As espécies secundárias são as de maior dominância nas maiores classes de altura e de diâmetro, sendo as principais responsáveis pela edificação do estrato superior, em especial a espécie Miconia sellowiana. As espécies que apresentaram melhor desempenho na colonização e estruturação da regeneração natural do Retiro-Branco, nos dois inventários, foram Miconia sellowiana, Psychotria sessilis, Leandra melastomoides, Clethra scabra, Myrsine umbellata, Miconia pepericarpa, Tibouchina candolleana, Cordia superba, Cestrum amictum, Alchornea triplinervia, Casearia sylvestris, Blepharocalyx salicifolius, Myrcia rostrata e Schinus terebinthifolius, sendo indicadas como espécies para uso nos programas de reabilitação de áreas mineradas em condições semelhantes sobre a

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

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    Chad H. Stahl

    2012-05-01

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

  16. Avaliação da contaminação no entorno de um aterro de resíduos sólidos urbanos com base em resultados de poços de monitoramento

    OpenAIRE

    Giulliana Mondelli; Heraldo Luiz Giacheti; Jorge Hamada

    2016-01-01

    RESUMO Este artigo apresenta o monitoramento ambiental das águas subterrâneas do entorno do aterro de resíduos sólidos urbanos (RSU) de Bauru, São Paulo, Brasil. Paralelamente às diversas pesquisas realizadas na área durante o período de janeiro de 2003 a abril de 2008, foram construídos 14 poços de monitoramento em diferentes fases da investigação geoambiental, seguindo as normas vigentes na época e as necessidades observadas durante a interpretação dos resultados desta investigação, para co...

  17. Activated charcoal and graphite for the micropropagation of Cattleya bicolor Lindl. and a orchid double-hybrid ‘BLC Pastoral Innocence’=Carvão ativado e grafite para a micropropagação de Cattleya bicolor Lindl. e um duplo híbrido de orquídea ‘BLC Pastoral Innocence’

    Directory of Open Access Journals (Sweden)

    Claudete Aparecida Mangolin

    2012-04-01

    Full Text Available No previous studies have investigated the use of graphite instead of activated charcoal in orchids. In this work, different concentrations of activated charcoal or graphite were added to KC medium to darken the culture medium and stimulate the in vitro propagation of Cattleya bicolor and of a double hybrid orchid (‘BLC Pastoral Innocence’. The seedlings were inoculated on growth regulator-free KC medium; the effects of activated charcoal (0.0, 1.5, 3.0, 4.5, 6.0, and 7.5 g L-1 and graphite (0.0, 1.5, 3.0, 4.5, 6.0, and 7.5 g L-1 concentrations were tested separately. Each flask contained fifteen seedlings, and the experiments had a randomised, two-way factorial design. The two tested variables were culture medium and illumination levels; eleven culture levels (different concentrations of graphite or activate charcoal and two illumination levels (14-hr photoperiod or continuous illumination were evaluated. Three replicates of each combination were utilised. After six months of culture, the average numbers of induced buds and roots per seedling were recorded for each concentration of activated charcoal or graphite. Whereas the largest number of buds in C. bicolor seedlings occurred on media containing 6.0 or 7.5 g L-1 graphite, the largest number of roots occurred on media containing 6.0 g L-1 activated charcoal. In the hybrid ‘BLC Pastoral Innocence’, the largest number of buds and roots was reported in medium with 4.5 g L-1 activated charcoal. When using graphite in place of activated charcoal, we obtained disparate the results in root formation that suggest that graphite is not a recommended substitute for activated charcoal.Nenhum estudo prévio tem investigado o uso de grafite como substituto do carvão ativado em orquídeas. No presente trabalho, concentrações diferentes de carvão ativado ou de grafite foram adicionadas ao meio KC para escurecer o meio de cultura e estimular a propagação in vitro de Cattleya bicolor e de um

  18. A tradição literária poética e sensorial em Le Clézio

    OpenAIRE

    Camarani, Ana Luiza Silva [UNESP

    2010-01-01

    A segunda metade do século XIX mostra-se como um período no qual em cada um dos grandes poetas se abre e se fecha o leque de correspondências da analogia: Baudelaire, Verlaine, Rimbaud, Mallarmé, expressam em sua obra essa tendência à busca da verdadeira vida, do real oculto, movimento em que as sensações desempenham um papel primordial. Atualmente, a obra de Le Clézio vem confi rmar a procura de um mundo completo suscitado pela poesia, o único modo possível de se traduzir em palavras o êxtas...

  19. Remoção de atrazina e metabólitos pela filtração lenta com leito de areia e carvão ativado granular Removal of atrazine and metabolites through slow filtration by sand and granular activated carbon

    Directory of Open Access Journals (Sweden)

    Edumar Ramos Cabral Coelho

    2012-09-01

    Full Text Available A atrazina (ATZé um herbicida largamente utilizado no mundo, sendo encontrada associada aos seus produtos de degradação em águas superficiais e subterrâneas. Pertence à classe das s-triazinas e, juntamente com os metabólitos clorados deetilatrazina (DEA e deisopropilatrazina (DIA, possui potencial carcinogênico e toxicidade como disruptores endócrinos. A limitação dos processos que empregam a coagulação química na remoção de ATZ, a conhecida capacidade do carvão ativado em remover microcontaminantes em água e o risco que a ATZ e seus metabólitos apresentam à saúde motivaram o estudo da filtração lenta com leito de areia e carvão ativado granular. Os resultados apontaram a eficiência do processo de filtração lenta com camada intermediária de carvão ativado granular na remoção de ATZ e a limitação deste na remoção dos metabólitos DEA, DIA e deetilhidroxiatrazina (DEHA.Atrazine (ATZ is widely used as herbicide, commonly found in association to its degradation products in surface water and groundwater. It belongs to the class of s-triazines and together with the chlorinated metabolites dieethylatrazine (DEA and deisopropilatrazine (DIA have carcinogenic potential and toxicity as endocrine disruptors. The limitation of the processes employing chemical coagulation in the removal of atrazine, the known ability of activated carbon to remove microcontaminants in water and the risk that atrazine and the potential toxicity to human health of its metabolits motivated the study of slow sand filtration bed combined with granular activated carbon. The results showed the high efficiency of the slow filtration process with intermediate layer of granular activated carbon in the removal of atrazine and its limitation on the removal of the metabolites DEA, DIA and diethylhidroxiatrazine (DEHA.

  20. Linfadenocromatografia perigástrica com carbono ativado (CH40: estudo experimental Perigastric lymphadenochromatography with activated carbon (CH40: experimental study

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    Minao Okawa

    2007-09-01

    Full Text Available RACIONAL: Procedimento cirúrgico bem instituído e planejado constitui ainda a única terapêutica efetiva para o câncer gástrico. Entretanto, os resultados de cura não têm melhorado significativamente nas últimas décadas, principalmente no ocidente. O principal benefício de introdução endoscópica de corantes na submucosa gástrica está na facilitação de linfadenectomias regradas, podendo facilitar a localização acurada dos linfonodos. Além disso, a linfadenocromatografia possibilita futuras pesquisas para a detecção do linfonodo sentinela e sua aplicabilidade racional e seletiva na indicação precisa da linfadenectomia, principalmente dos grupos de linfonodos de ressecção mais trabalhosa e com maiores possibilidades de complicações. A linfadenocromatografia com carbono ativado (CH40 foi analisada neste estudo experimental (fase 1. OBJETIVOS: Testar a efetividade e inocuidade da linfadenocromatografia com CH40, em três espécies animais diferentes. MÉTODOS: Como preconizado pela Associação Brasileira de Pesquisas Clínicas (Resoluções nº 196/96 e 251/97, CNS/MS, foram utilizados três espécies diferentes de animais: 3 cães, 10 coelhos e 20 ratos. Em todos os cães, a introdução de CH40 na camada submucosa de estômago foi realizada através da endoscopia gástrica e utilizando, cateter de polietileno agulhado, usualmente empregado na esclerose de varizes esofageanas. O período de observação variou de 43 a 125 dias, quando o procedimento cirúrgico foi realizado. Em todos os coelhos e ratos a introdução de CH40 foi realizada através de agulha hipodérmica e seringa insulínica, na região subcutânea inguinal. O período de observação foi de 102 a 105 dias e 110 a 122 dias, respectivamente. RESULTADOS: Nos períodos de observação, desde a injeção até a eutanásia, não se detectou em nenhum animal efeito colateral ou óbito. Nos cães, linfonodos perigástricos foram corados pelo CH40. Em todos os

  1. Discurso étnico-literário: memórias poéticas em Conceição Evaristo

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    Cristina Prates

    2010-12-01

    Full Text Available Buscando compreender a tensão que se estabelece entre biografia e criação literária, este trabalho pretende dialogar com as memórias poéticas de Conceição Evaristo, sobretudo com o romance Becos da memória, espaço no qual se dramatizam várias vozes identitárias que, acordadas por uma poética da etnicidade, encenam histórias afro-mineiras, promovendo, pela alquimia da linguagem afetiva, a libertação das lembranças e a redenção do passado.Palavras-chave: Memória; Biografia; Ficção; Etnicidade; Literatura

  2. Achados eletrencefalográficos em pacientes com toxoplasmose

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    Rubens Moura Ribeiro

    1964-06-01

    Full Text Available Foram estudados os exames eletrencefalográficos de 34 pacientes com toxoplasmose, comparando-os com os eletrencefalogramas obtidos em grupo contrôle constituido por 50 indivíduos sem coriorretinite, sem síndrome convulsiva e sem sintomatologia neurológica. Para diferençar traçados eletrencefalográficos normais de traçados alterados foram considerados: a a presença, ou não, de atividade paroxística focal; b a freqüência geral da atividade elétrica; c as assimetrias de ritmo; d o caráter e grau de resposta à ativação pela hiperpnéia. Alterações eletrencefalográficas foram observadas em 30 (88,2% pacientes do grupo com toxoplasmose e em 27 (54% indivíduos do grupo contrôle. Atividade paroxística focal representada por ondas "sharp" foi registrada em 18 (53% pacientes do grupo patológico: em 7 a alteração foi encontrada no traçado de repouso e confirmada no traçado ativado pela hiperpnéia; em 10 a alteração só foi registrada durante o traçado ativado; em 1, só foi observada durante o traçado de repouso, não tendo sido o paciente submetido à ativação pela hiperpnéia. No grupo contrôle, a atividade paroxística focal foi observada em 8 (16% indivíduos, sendo que em um a alteração foi registrada durante o traçado de repouso e durante o sono. Ritmos rápidos de mais de 13 c/seg. foram registrados em 5 (15% pacientes do grupo patológico; no grupo contrôle não foram encontrados ritmos rápidos. Assimetria da atividade elétrica cerebral apareceu em 7 (21,2% pacientes do grupo patológico e em 3 (6% do grupo contrôle. Desorganização do ritmo foi encontrada em 15 (46,9% pacientes do grupo patológico e em 11 (22% do grupo contrôle, sempre mediante ativação pela hiperpnéia. A desorganização do ritmo, quando encontrada, revelou-se, em média, mais duradoura no grupo patológico que no grupo contrôle. Irregularidade do ritmo foi observada em 12 (37,5% pacientes do grupo patológico, sendo que em dois

  3. A cachoeira do Poço Encantado: empreendimento familiar e presença Kalunga na cadeia do ecoturismo em Teresina de Goiás

    Directory of Open Access Journals (Sweden)

    Kelma Christina Melo dos Santos Cruz

    2005-12-01

    Full Text Available Apresentam-se os principais resultados e discussões de dissertação de mestrado, cujo objeto é a experiência desenvolvida na Cachoeira do Poço Encantado, no município de Teresina de Goiás, considerando-o, metodologicamente, como manifestação singular da conformação atual da sociedade capitalista, que se apresenta de forma contraditória e dinâmica. Na construção do objeto perseguiram-se os seguintes objetivos: conhecer as estratégias implementadas e que conformam a cadeia do ecoturismo naquela localidade; compreender de que maneira os Kalungas estão inseridos nessa cadeia; refletir sobre a formulação e implementação de políticas públicas que contemplem as comunidades quilombolas no Brasil, e fornecer indicações quanto às perspectivas futuras.The object of study in this research is the ecotourism experience developed in the Poço Encantado Waterfall located in Teresina de Goiás, in the Chapada dos Veadeiros region, Northeast of Goiás. It is a family business established since 1996 opened to public visitation which offers rural and ecological tourism. The activities developed there are also related to the territory of the biggest remaining community of quilombos in Brazil: the Kalunga community. In order to understand this object of study we attempted to attain the following objectives: a To know the strategies that form and were implemented in the chain of ecotourism in the waterfall of Poço Encantado; b To understand in what ways the Kalunga people are inserted within such chain; c To reflect about the formulation and implementation of public policies which can benefit the Quilombolas communities in Brazil; d To provide a plan concerning future perspectives. In this research, we chose the single case study as a methodological resource. We consider the Poço Encantado Waterfall to be a unique manifestation that must be contextualized and part of the present capitalist society which presents itself in a contradictory

  4. PO.EX em EXPO (ou POesia EXperimental em EXPOsição: Ernesto Melo e Castro, António Barros e Silvestre Pestana na Casa da Escrita

    Directory of Open Access Journals (Sweden)

    Manaíra Aires Athayde

    2013-07-01

    Full Text Available Review of three exhibitions: Ernesto MELO E CASTRO, Do Leve à Luz (3 october - 2 november 2012; António BARROS, Progestos_Obgestos (30 november - 21 december 2012; Silvestre PESTANA, Povo Novo Virtual (8 february - 1 march 2013. Ciclo NAS ESCRITAS PO.EX, Casa da Escrita, Coimbra, Portugal.

  5. Adaptação de Thyrinteina arnobia em novo hospedeiro e defesa induzida por herbívoros em eucalipto

    OpenAIRE

    Holtz Anderson Mathias; Oliveira Hamilton Gomes de; Pallini Angelo; Marinho Jeanne Scardini; Zanuncio José Cola; Oliveira Claudinei Lima

    2003-01-01

    O sistema de defesa induzido de plantas é ativado quando herbívoros se alimentam das mesmas. Alternativamente, herbívoros podem se adaptar a espécies de plantas filogeneticamente próximas ao seu hospedeiro de origem. O objetivo deste trabalho foi comparar o desenvolvimento de Thyrinteina arnobia em plantas de goiaba (hospedeiro de origem) e de eucalipto (hospedeiro novo) em campo. Adicionalmente, estudou-se a biologia deste inseto em laboratório fornecendo folhas de eucalipto previamente dani...

  6. Desenvolvimento de novos materiais baseados em argilas e carvões para aplicações como catalisadores e adsorventes em remediação ambiental

    OpenAIRE

    Luiz Carlos Alves de Oliveira

    2003-01-01

    Neste trabalho foram estudadas diversas aplicações ambientais de duas classes de materiais microporosos: a argila pilarizada e carvão ativado. A argila foi utilizada em três processos: (i) como catalisadores para a oxidação de contaminantes orgânicos, (ii) na produção de adsorventes magnéticos para a remoção de contaminantes metálicos e (iii) na produção de catalisadores monolíticos para o tratamento de efluentes, O carvão ativado foi utilizado para: (i) preparação de compósitos magnéticos pa...

  7. Estrutura e discursividade do texto poético

    OpenAIRE

    Francisco de Assis Moura Sobreira

    2007-01-01

    Esta dissertação constitui uma investigação da estrutura e da discursividade do texto poético em suas virtualidades e está dividida em duas partes, distintas, mas não estanques. Na primeira parte, estudamos o texto poético considerando seus aspectos estruturais; na segunda, tratamos dos fatores que envolvem seus aspectos discursivos. Em relação aos os aspectos estruturais, consideramos o que formalmente torna o texto um objeto de arte literária. Aqui, em primeira mão, atentamos para os estudo...

  8. Comparative analysis of tidepool fish species composition on tropical coastal rocky reefs at State of Ceará, Brazil Análise comparativa da composição das espécies de peixes em poças de maré em recifes costeiros no estado do Ceará, Brasil

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    Edna A. Cunha

    2008-09-01

    Full Text Available This study compared tidepool fish assemblages within and among habitats at Iparana and Pecém beaches, State of Ceará, Northeast Brazil, using visual census techniques. A total of 8,914 fishes, representing 25 families and 43 species were recorded. The most abundant taxon was Sparisoma spp, followed by Haemulon parra (Desmarest, 1823, Acanthurus chirurgus (Bloch, 1787 and Abudefduf saxatilis (Linnaeus, 1758. Haemulidae was the most abundant family in number of individuals, followed by Scaridae, Acanthuridae and Pomacentridae. Within- and between- site differences in species assemblages probably reflected environmental discontinuities and more localized features, such as pool isolation episodes, or environmental complexity, both acting isolated or interactively. The locality of Iparana was probably subjected to a greater fishing pressure and tourism than Pecém, a potential cause for the observed lowest fish abundance and biodiversity. We conclude that tidepool ichthyofauna may be quite variable between and within reef sites. Thus, observations taken from or damages caused on one area may not be generalized to or mitigated by the protection of adjacent sites.Este estudo comparou assembléias de peixe em poças de maré dentro e entre hábitats nas praias de Iparana e Pecém, estado do Ceará, nordeste do Brasil, usando técnicas de censo visual. Um total de 8.914 peixes, representando 25 famílias e 43 espécies foi registrado. Sparisoma spp. formaram o taxon mais abundante, seguido por Haemulon parra (Desmarest, 1823, Acanthurus chirurgus (Bloch, 1787 e Abudefduf saxatilis (Linnaeus, 1758. Haemulidae foi a família mais abundante em número de indivíduos, seguida por Scaridae, Acanthuridae e Pomacentridae. Diferenças encontradas nas assembléias de espécies provavelmente refletiram descontinuidades ambientais e aspectos mais localizados, como a ocorrência de isolamento das poças, ou complexidade ambiental atuando de forma isolada ou

  9. Adiçăo de biopolímeros em pastas de cimento para utilizaçăo em poços de petróleo /

    OpenAIRE

    Garcia, Marcela Ines

    2007-01-01

    Orientador: Kleber Franke Portella Co-orientadora: Helena Maria Wilhelm Dissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduaçao em Engenharia - PIPE. Defesa: Curitiba, 2007 Inclui bibliografia Área de concentraçao: Engenharia e cięncias de materiais

  10. Um replicador em movimento: aproximações entre a poética narrativa de Borges e o programa de pesquisa dos memes A replicator in movement: similarities between Borges' poetic narrative and the memes research agenda

    Directory of Open Access Journals (Sweden)

    Ricardo Waizbort

    2008-03-01

    Full Text Available A extensa obra fantástica de Jorge Luis Borges tem sido lida como uma crítica contra a ciência tradicional e a lógica, como tendo repudiado a importância do indivíduo, a pressuposição da própria realidade e conseqüentemente, as formas de conhecimento que nos são acessíveis. Neste trabalho, procuramos mostrar um novo ângulo de compreensão da narrativa poética borgeana, evidenciando a capacidade dessa narrativa de apreender fenômenos culturais sob um ponto de vista científico. Apresentamos uma analogia entre a poética narrativa de Borges e a memética, sendo esta uma tentativa de interpretar a natureza humana em termos tanto de genes quanto de memes, ou seja, idéias compreendidas como padrões culturais. Embora qualquer obra literária seja veículo de idéias, acreditamos que Borges, escrevendo de forma extremamente crítica, parece estar especialmente consciente da independência das idéias, e seus personagens poderiam ser vistos como prisioneiros de labirintos de memes.Jorge Luis Borges' extensive fantasy writings have been read as a critique of traditional science and logic and as a repudiation of the individual's importance, of the presumption of reality itself, and, consequently, of the forms of knowledge accessible to us. The article presents a new way of understanding Borges' poetic narrative, evincing this narrative's ability to grasp cultural phenomenon from a scientific perspective. An analogy is drawn between Borges' poetic narrative and memetics, the latter being an attempt to interpret human nature in terms not only of genes but also of memes - that is, ideas understood as cultural patterns. Although any literary work is a vehicle for ideas, Borges, who writes in an extraordinarily critical fashion, seems particularly aware of the independence of ideas and therefore, the article asserts, his characters can be seen as prisoners inside labyrinths of memes.

  11. Crescimento in vitro e aclimatização de Cattleya loddigesii Lindley (Orchidaceae com carvão ativado sob dois espectros luminosos In vitro growth and acclimatization of Cattleya loddigesii Lindley (Orchidaceae with actived charcoal in two light spectra

    Directory of Open Access Journals (Sweden)

    Renato Fernandes Galdiano Júnior

    2012-05-01

    Full Text Available O objetivo deste estudo foi avaliar a adição de concentrações de carvão ativado em meio de cultura ½ MS (com metade da concentração dos macronutrientes sob dois espectros luminosos para a obtenção de plântulas in vitro de Cattleya loddigesii. Plântulas com aproximadamente 90 dias foram subcultivadas em oito tratamentos, nos quais foi testada a adição ao meio de cultura ½ MS com carvão ativado (0; 0,5; 1,0 e 2,0g L-1 e combinados sob espectro de luz branca e luz vermelha. Após 180 dias da germinação, foram mensurados dados biométricos (raiz e parte aérea, massa fresca e teores de pigmentos fotossintéticos. Em plântulas aclimatizadas em casa de vegetação, foram avaliadas a taxa de sobrevivência após 120 dias. As concentrações de clorofila total, clorofila a e carotenoides foram maiores nos tratamentos sob luz branca, enquanto a luz vermelha influenciou significativamente maior clorofila b, plântulas com menos raízes e de menor comprimento e elevada mortalidade ex vitro. A adição de 2,0g L-1 de carvão ativado ao meio de cultura e o uso de luz branca proporcionaram maior eficiência de desenvolvimento tanto para as culturas in vitro quanto para a sobrevivência ex vitro das plantas.The aim of this study was to evaluate the effect of different concentrations of activated charcoal in ½ MS (half concentration of macronutrients culture medium under two light spectra on the in vitro growth of Cattleya loddigesii seedlings. Plantlets with approximately 90 days were subcultured under eight treatments, consisting of different active charcoal concentrations (0; 0.5; 1.0 and 2.0g L-1 in ½ MS medium combined with white and red light spectra. After 180 days of germination, biometric data, fresh weight, and the level of photosynthetic pigments were evaluated. Plantlets acclimatized in a greenhouse were evaluated for survival after 120 days. Total chlorophyll, chlorophyll a, and carotenoid concentrations were higher in

  12. Avaliação da contaminação no entorno de um aterro de resíduos sólidos urbanos com base em resultados de poços de monitoramento

    Directory of Open Access Journals (Sweden)

    Giulliana Mondelli

    2016-03-01

    Full Text Available RESUMO Este artigo apresenta o monitoramento ambiental das águas subterrâneas do entorno do aterro de resíduos sólidos urbanos (RSU de Bauru, São Paulo, Brasil. Paralelamente às diversas pesquisas realizadas na área durante o período de janeiro de 2003 a abril de 2008, foram construídos 14 poços de monitoramento em diferentes fases da investigação geoambiental, seguindo as normas vigentes na época e as necessidades observadas durante a interpretação dos resultados desta investigação, para confirmação da contaminação da área. As amostras foram coletadas com bailer , após o período de chuvas e de estiagem de cada ano. São apresentados os resultados obtidos ao longo do tempo para os seguintes parâmetros: nível d'água, pH, condutividade elétrica (CE, Ca2+, Cl, Fe total, DQO, NH4 +, Zn2+, Na+, K+, além da relação demanda biológica de oxigênio/demanda química de oxigênio (DBO/DQO. Os resultados do longo período de monitoramento permitiram a análise de cada parâmetro em função do que ocorria superficialmente ao aterro, assim como com características naturais do aquífero. Conclui-se que a pluma de contaminação varia conforme o ponto de disposição e as características dos resíduos depositados, cuja recuperação e atenuação deverão ocorrer com o encerramento das atividades do aterro.

  13. Encapsulation of aluminum phosphate nanoparticles (AiPO{sub 4}) functionalized with 3-mercapto-propyl trimethoxy-silane (MPTMS) by mini emulsion polymerization; Encapsulacao de nanoparticulas de fosfato de aluminio (AiPO{sub 4}) funcionalizadas com trimetoxsilano propil metacrilato (MPTMS) vip polimerizacao em miniemulsao

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Leticia A. da; Machado, Ricardo A.F.; Araujo, Pedro H.H. de; Sayer, Claudia, E-mail: leticia@enq.ufsc.br [Universidade Federal de Santa Catarina - UFSC, Florianopolis, SC (Brazil); Sudol, Edward D.; El-Aasser, Mohamed S. [Lehigh University, Bethlehem, Pensilvania (United States)

    2011-07-01

    This work aims the use of the mini emulsion polymerization process for the attainment of a copolymer latex made of styrene butyl {eta}-acrylate (50/50) in the presence of 3 wt.% of AlPO{sub 4} with the surface chemically modified with 3-Mercapto-Propyl trimethoxy-Silane (MPTMS) in three different concentrations (5, 10 and 20 wt.% based on AlPO{sub 4}). The confirmation of the AlPO{sub 4} functionalization was made by FTIR. The encapsulation efficiency was analyzed through the density gradient column, energy dispersive X-ray and transmission electron microscopy and the average particles size and its distribution by capillary hydrodynamic fractionation. Results had shown that it was possible to encapsulate the AlPO{sub 4} and that the sample functionalized with 20 wt% of MPTMS resulted in a latex with greater density and a weight average particle size of (Dw) 116 nm. (author)

  14. Spectroscopy of $^{194}$Po

    CERN Document Server

    Younes, W; Jin, H Q; Bernstein, L A; McNabb, D P; Davids, C N; Janssens, R V F; Khoo, T L; Lister, C J; Blumenthal, D J; Carpenter, M P; Henderson, D; Henry, R G; Lauritsen, T; Nisius, D T; Pentillä, H; Drigert, M W; Jin, H Q

    1995-01-01

    Prompt, in-beam \\gamma rays following the reaction ^{170}Yb + 142 MeV ^{28}Si were measured at the ATLAS facility using 10 Compton-suppressed Ge detectors and the Fragment Mass Analyzer. Transitions in ^{194}Po were identified and placed using \\gamma-ray singles and coincidence data gated on the mass of the evaporation residues. A level spectrum up to J\\approx10\\hbar was established. The structure of ^{194}Po is more collective than that observed in the heavier polonium isotopes and indicates that the structure has started to evolve towards the more collective nature expected for deformed nuclei.

  15. po_stack_movie

    DEFF Research Database (Denmark)

    2009-01-01

    po_stack® er et reolsystem, hvis enkle elementer giver stor flexibilitet, variation og skulpturel virkning. Elementerne stables og forskydes frit, så reolens rum kan vendes til begge sider, være åbne eller lukkede og farvekombineres ubegrænset. Reolen kan let ombygges, udvides eller opdeles, når ...

  16. Expressão intra-renal dos RNA mensageiros de proteínas associadas ao podócito e de fatores pro fibróticos em glomerulopatias primárias e secundárias

    OpenAIRE

    Maysa Lucena de Souza

    2015-01-01

    Introdução: A podocitopenia e a podocitúria são marcadores de injúria glomerular em podocitopatias (POD) e glomerulonefrites proliferativas (GNsP), e mesmo em fases iniciais destas doenças mecanismos pró-fibróticos indutores de glomeruloesclerose e fibrose renal progressiva estão ativados. Objetivo: Avaliar pacientes portadores de glomerulopatias biopsiados em diferentes tempos de evolução clínica, correlacionando lesões morfológicas dos compartimentos glomerular e túbulo-intersticial com a e...

  17. KPr(PO34

    Directory of Open Access Journals (Sweden)

    Abdelghani Oudahmane

    2010-08-01

    Full Text Available Single crystals of the title compound, potassium praseodymium(III polyphosphate, were obtained by solid-state reaction. The monoclinic non-centrosymmetric structure is isotypic with all other KLn(PO34 analogues from Ln = La to Er, inclusive. The crystal structure of these long-chain polyphosphates is built up from infinite crenelated polyphosphate chains of corner-sharing PO4 tetrahedra with a repeating unit of four tetrahedra. These chains, running along [100], are arranged in a pseudo-tetragonal rod packing and are further linked by isolated PrO8 square antiprisms [Pr—O = 2.3787 (9–2.5091 (8 Å], forming a three-dimensional framework. The K+ ions reside in channels parallel to [010] and exhibit a highly distorted coordination sphere by eight O atoms at distances ranging from 2.7908 (9 to 3.1924 (11 Å.

  18. Role of iron in the nitric oxide-mediated fungicidal mechanism of IFN-gamma-activated murine macrophages against Paracoccidioides brasiliensis conidia Papel do ferro no mecanismo fungicida mediado pelo óxido n��trico de macrófagos murinos ativados com IFN-gama contra conídias do Paracoccidioides brasiliensis

    Directory of Open Access Journals (Sweden)

    Angel Gonzalez

    2007-02-01

    ídia-à-levedura na ausência do ferro. Estudamos a participação do ferro no mecanismo fungicida mediado pelo óxido nítrico (NO na sua interação com as conídias do fungo. Macrófagos peritoneais murinos ativados com 50U/mL de IFN-gama ou tratados com 35 µM Deferoxamina (DEX e infectados com conídias do P. brasiliensis foram co-cultivados e incubados por 96 h na presença de concentrações diferentes de holotransferrina (HOLO e FeS0(4. Os sobrenadantes foram retirados a fim de avaliar a produção de NO2 pelo método de Griess. Os macrófagos eram fixados, corados e observados ao microscópio. A porcentagem da transição de conídia-à-levedura foi estimada contando 200 propágulos intracelulares. Os macrófagos ativados com citocina ou tratados com DEX apresentaram inibição marcada da conversão de conídia-à-levedura (19 e 56%, respectivamente em comparação com macrófagos controle (80%. Os macrófagos ativados com IFN-gama produziram elevação nos níveis de NO em comparação com macrófagos não-tratados ou não-activados. Adicionalmente, quando as monocapas ativadas ou tratadas foram suplementadas com doadores do ferro (HOLO ou FeSO4, a ação inibitória foi revertida embora a produção de NO permanecesse intacto. Estes resultados sugerem que o mecanismo fungicida mediado pelo NO exercido por macrófagos ativados com IFN-gama contra conídias do P. brasiliensis é dependente de uma interação do ferro.

  19. Obtenção e caracterização de carvão ativado de caroço de buriti (Mauritia flexuosa L. f. para a avaliação do processo de adsorção de cobre (II Production and characterization of the activated carbon from buriti stone (Mauritia flexuosa L. f. to evaluate the adsorption's process of copper (II

    Directory of Open Access Journals (Sweden)

    Marcos Vinicios de Souza Pinto

    2013-03-01

    Full Text Available Na região amazônica, algumas indústrias despejam cobre nos corpos receptores que, em elevadas concentrações, é tóxico para os seres vivos. A remoção de cobre de efluentes industriais é realizada por diversos processos como a adsorção. Neste trabalho mostrou-se o resultado da adsorção de cobre (II em carvão ativado de caroço de buriti carbonizado a 400 °C e ativado a 900 °C. O carvão ativado foi caracterizado em termos de área específica, tamanho dos poros, densidades aparente e real, porosidade, microscopia eletrônica de varredura, conteúdo de cinzas, pH, umidade, carbono fixo e grupos funcionais de superfície. O estudo de equilíbrio de adsorção avaliou a influência do diâmetro das partículas do carvão, do tempo de contato adsorvente/adsorbato, do pH e da concentração inicial da solução de cobre (II sobre a remoção de cobre (II. Com base nos resultados, concluiu-se que há uma maior eficiência de remoção de cobre (II para diâmetro In the Amazon region some industries discharges copper into watercourse that in high concentrations is toxic to the biota. The removal of copper from industrial effluent is performed by several processes such as adsorption. This work shows the result of copper (II adsorption on activated carbon obtained from buriti kernel, carbonized at 400 °C and activated at 900 °C. The activated carbon was characterized according to specific area, pore size, apparent and real density, porosity, scanning electron microscopy, ash content, pH, moisture, fixed carbon and surface functional groups. The study of adsorption equilibrium evaluated the influence of the coal particles diameter, contact time adsorbent/adsorbate, pH and copper (II solution initial concentration on copper (II remotion. The results showed a higher removal efficiency of copper (II to the diameter D < 0.595 mm, contact time of 300 minutes, pH of 4.01 and the copper (II initial concentrations of 50 and 80 mg L-1. The

  20. Avaliação de argilas bentoníticas policatiônicas do estado da Paraíba com aditivos para aplicação em perfuração de poços de petróleo e tintas à base de água

    Directory of Open Access Journals (Sweden)

    B. M. A. Brito

    2016-03-01

    Full Text Available Resumo Com o surgimento das novas ocorrências de bentonitas no estado da Paraíba, há necessidade da otimização de sua reologia de forma a adequá-las às exigências da indústria nacional, visando seu uso em fluidos de perfuração e tintas à base de água. Foram utilizadas três argilas (Chocolate Campos Novos, Chocolate Corredor e Chocobofe Primavera com o objetivo de avaliar as propriedades tecnológicas para uso como agente tixotrópico na formulação de fluidos de perfuração e tintas à base de água; esta pesquisa trata da reologia de dispersões de argilas aditivadas com MgO de forma conjunta e isolada com o Na2CO3. O comportamento reológico foi estudado em viscosímetro em dispersões de 4,86% e 6,00% (em massa e com aditivos variando de 2% a 3% (em massa na forma simples e combinada. Os resultados obtidos foram comparados com as especificações da Petrobras, API e ISO. As amostras estudadas apresentaram características típicas das bentonitas oriundas do estado da Paraíba, apresentando os argilominerais característicos esmectíticos, cauliníticos e acessórios; as análises reológicas evidenciaram que as argilas em estudo utilizando o Na2CO3 exibiram resultados promissores para aplicação tecnológica em fluidos de perfuração de poços e que a aditivação das amostras com Na2CO3 em conjunto com o MgO exibiram resultados promissores para aplicação tecnológica em tintas à base de água.

  1. Ação dos meios reativos peróxido de hidrogênio e carvão ativado na remediação de solos contaminados por BTEX Action of the reactive means hydrogen peroxide and activated coal in remediation of contamined soils by btex

    Directory of Open Access Journals (Sweden)

    Edneia S. De O. Lourenço

    2010-02-01

    Full Text Available Esta pesquisa teve como objetivo avaliar o potencial das barreiras reativas permeáveis (BRP na redução dos hidrocarbonetos aromáticos BTEX (Benzeno, Tolueno, Etilbenzeno e Xilenos no solo, provenientes de vazamento de gasolina. O experimento foi conduzido em escala laboratorial, simulando dois tipos de BRP, denominadas de AS (H2O2 + solo e de ACA (H2O2 + carvão ativado. Foram determinadas as concentrações dos BTEX na amostra da gasolina ao entrar na BRP e no percolado, em tempos de retenção preestabelecidos de 24; 36; 48; 60; 72 e 84 h, utilizando cromatografia gasosa. Os resultados obtidos mostraram que as duas barreiras reativas reduziram a concentração dos BTEX, próximo a níveis permissíveis de contaminação e de prevenção, e a barreira ACA apresentou os melhores resultados.This research had as objective to evaluate the potential of permeable reactive barriers in the reduction of aromatical hydrocarbons BTEX (Benzene, Toluene, Ethylbenzene and Xylenes in the ground, coming from gasoline leak. The experiment was carried out in a laboratorial scale, simulating two types of PRB called: AS (H2O2 + soil and ACA (H2O2 + activated coal. The BTEX concentrations in the gasoline sample were assessed when entering in PRB and in the percolate in pre-established retention times of 24; 36; 48; 60; 72 and 84h, using gas chromatography. The obtained results showed that the two reactive barriers reduced the BTEX concentration, close at permissible levels of contamination and prevention, and the ACA barrier presented better results.

  2. Adaptação de Thyrinteina arnobia em novo hospedeiro e defesa induzida por herbívoros em eucalipto

    Directory of Open Access Journals (Sweden)

    Holtz Anderson Mathias

    2003-01-01

    Full Text Available O sistema de defesa induzido de plantas é ativado quando herbívoros se alimentam das mesmas. Alternativamente, herbívoros podem se adaptar a espécies de plantas filogeneticamente próximas ao seu hospedeiro de origem. O objetivo deste trabalho foi comparar o desenvolvimento de Thyrinteina arnobia em plantas de goiaba (hospedeiro de origem e de eucalipto (hospedeiro novo em campo. Adicionalmente, estudou-se a biologia deste inseto em laboratório fornecendo folhas de eucalipto previamente danificadas por lagartas de T. arnobia e folhas sem danos. A sobrevivência larval em eucalipto, 78,00%, foi superior à de goiaba, 29,33%. O ciclo larval foi de 27,90 dias em goiaba e de 30,30 dias em eucalipto. Em testes de laboratório, o ciclo larval em eucalipto limpo, 36,39 dias, foi maior do que em eucalipto danificado, 32,89 dias. A mortalidade larval em eucalipto danificado foi de 30,00% e de 10,00% em eucalipto limpo. Os resultados indicam que a goiaba não é um bom hospedeiro para T. arnobia possivelmente por apresentar um sistema mais efetivo de defesa. Embora o eucalipto possa ser um hospedeiro mais favorável ao desenvolvimento e estabelecimento do inseto, pode também reduzir populações do herbívoro ativando o seu sistema de defesa induzido.

  3. Concentração de Rn-222 e filhos em águas provenientes de poços e emergências de água da região de Presidente Prudente: resultados preliminares

    Directory of Open Access Journals (Sweden)

    Ana Maria Araya Osório

    2009-12-01

    Full Text Available This work presents the preliminary results about the concentration of radon and radon daughters in wells and springs water from Presidente Prudente. Six water samples were studied: three from well-water, two from springs water and one from poTabelale water. For the etermination of α-activity the samples were placed inside plastic containers where the CR-39 tracks detectors were outside the water. The track density of α-particles were measured by using optical microscopy. The results show that one sample from well-water presented higher concentration of radon and radon daughters than the other samples.

  4. Comportamento reológico de xantana produzida por Xanthomonas arboricola pv pruni para aplicação em fluido de perfuração de poços de petróleo Rheological behaviour of xanthan produced by Xanthomonas arboricola pv pruni for application in fluid of oil well perforation

    Directory of Open Access Journals (Sweden)

    Caroline D. Borges

    2009-06-01

    Full Text Available O trabalho objetivou avaliar xantanas produzidas por Xanthomonas arboricola pv pruni como viscosificante de fluido para aplicação na perfuração de poços de petróleo, comparando-as com três amostras comerciais utilizadas para este fim. Para isto, a viscosidade de soluções aquosas e salinas (NaCl, KCl e CaCl2 das diferentes xantanas, em distintas temperaturas (25, 45, 65 e 80 ºC, foi determinada em reômetro. Os parâmetros reológicos índice de consistência (K e o índice de fluxo (n foram obtidos pelo ajuste do modelo de Ostwald-de-Waelle. A força gel (G0, G10 e G30 foi determinada em viscosímetro, e a concentração de sais monovalentes (sódio e potássio e divalentes (cálcio e magnésio foi determinada em fotômetro de chama e em espectrômetro de absorção atômica, respectivamente. De uma forma geral, os resultados obtidos neste estudo mostram que as xantanas produzidas pelo patovar pruni, Xp 106-600 e Xp 115-600, por conterem baixa concentração de sais, apresentaram potencial para aplicação em fluido de perfuração de poços de petróleo, quando utilizada solução salina. Já os polímeros comerciais apresentaram melhores resultados quando utilizados em solução aquosa, pois continham alta concentração de sais.The aim of this work was to evaluate xanthans produced by Xanthomonas arboricola pv pruni to be used for increasing the viscosity of fluids applied in the perforation of oil wells, which were compared with three commercial samples. In order to do that, the viscosity of aqueous and saline solutions (NaCl, KCl and CaCl2 from different xanthans, at different temperatures (25, 45, 65 and 80 ºC, was determined in a rheometer. The rheological parameters consistency index (K and flow behaviour index (n were obtained by adjusting the data with the Ostwald-de-Waelle model. Gel strength (G0, G10 e G30 was determined in a viscometer, and the concentration of monovalent (sodium and potassium and divalent salts (calcium

  5. Emprego do carvão ativado e de uma protease do Bacillus subtilis na obtenção de hidrolisados protéicos de leite com baixo teor de fenilalanina
    Use of activated carbon and a protease from Bacillus subtilis for obtaining milk protein hydrolysates

    Directory of Open Access Journals (Sweden)

    M. W. S. SOUZA

    2010-09-01

    Full Text Available

    Considerando a importância do leite na dieta do brasileiro e a sua restrição para pacientes fenilcetonúricos, este trabalho teve como objetivo reduzir o teor de fenilalanina (Phe deste alimento. Para isso, vários hidrolisados enzimáticos foram preparados, empregando uma protease do Bacillus subtilis e testando diversos parâmetros de reação, como o efeito do tempo, da temperatura e da relação E:S. A remoção da Phe foi realizada empregando o carvão ativado (CA como meio adsorvente, e avaliou-se as relações proteína:CA de 1:22, 1:44 e 1:88. A efi ciência da remoção foi avaliada por espectrofotometria derivada segunda, determinando-se o teor de Phe livre no leite e em seus hidrolisados, após tratamento com CA. A maior remoção de Phe (75,9% foi obtida com o tempo de 5h, a temperatura de 50ºC, a relação E:S de 4:100 e a relação proteína:CA de 1:22. Este ensaio originou um leite com teor fi nal de 36,9mg de Phe/100ml, o que permitiria a utilização do mesmo por pacientes fenilcetonúricos.

  6. Nuno Júdice: arte poética com melancolia

    Directory of Open Access Journals (Sweden)

    Ida Maria Santos Ferreira Alves

    2006-06-01

    Full Text Available Nuno Júdice é uma das mais representativas vozes no panorama poético de Portugal a partir da década de setenta, com uma escrita que tensiona os limites (limites? entre modernismo e pós-modernismo, configurando o que poderíamos nomear de uma poética da melancolia. O tom dessa poesia é freqüentemente pessimista; no entanto, essa afirmação deve ser relativizada porque, de fato, não é seu tom único, e sim expressão variável de diferentes sujeitos poéticos que vão aparecendo na cena do poema, representando um “drama em gente” a falar da condição humana no mundo contemporâneo, em meio a ruínas, fragmentos e vestígios da memória. Escrita perpassada de ironia, criticamente relendo a tradição poética ocidental, muitas vezes enfrenta a melancolia com um breve sorriso de quem sabe que o canto se faz de ficções e que é, apesar de sua desilusão, uma janela aberta, mirando o horizonte para além das ruínas deste mundo.

  7. Diet of Lontra longicaudis (Carnivora: Mustelidae in a pool system in Atlantic Forest of Minas Gerais State, southeastern Brazil=Dieta de Lontra longicaudis (Carnivora: Mustelidae em um sistema de poções na Floresta Atlântica do Estado de Minas Gerais, sudeste do Brasil

    Directory of Open Access Journals (Sweden)

    Fernando Marques Quintela

    2012-10-01

    Full Text Available The present study aimed to investigate the feeding habits of Lontra longicaudis in a pool system within the Private Reserve of Natural Patrimony (RPPN Usina Maurício, located in Paraíba do Sul river basin, Atlantic Forest of southeastern Minas Gerais State. The diet composition was determined based on the identification of items present in 212 scats sampled between July 2008 and October 2009 in a 4.1 km stretch of the pool system. The found items and its respective percentages of occurrence were: mollusks (0.5%, insects (16.5%, spiders (1.4%, crustaceans (3.3%, fish (96.7%, amphibians (0.9%, snakes (3.8%, birds (2.8%, mammals (8.5% and fruits (0.5%. Among fish, the identified families and respective percentages of occurrence were: Loricariidae (65.4%, Pimelodidae (42.9% Cichlidae (22%, Characidae (7.3%, Erythrinidae (3.9%, Synbranchidae (2.4%, Anostomidae (2%. Therefore fish make up the most consumed item in the study area, with the predominance of benthic siluriformes (families Loricariidae and Pimelodidae. O presente estudo teve como objetivo investigar os hábitos alimentares de Lontra longicaudis em um sistema de poções na Reserva Particular do Patrimônio Natural – RPPN Usina Maurício, localizada na bacia do rio Paraíba do Sul, Mata Atlântica do Sudeste do Estado de Minas Gerais. A composição da dieta foi determinada com base na identificação de itens presentes em 212 amostras de fezes coletadas entre julho de 2008 e outubro de 2009 em um trecho de 4,1 km de um sistema de poções. Os itens alimentares encontrados e suas respectivas porcentagens de ocorrência foram: moluscos (0,5%, insetos (16,5%, aranhas (1,4%, crustáceos (3,3%, peixes (96,7%, anfíbios (0,9%, serpentes (3,8%, aves (2,8%, mamíferos (8,5%, frutos (0,5%. Dentre os peixes, famílias identificadas e suas respectivas porcentagens de ocorrência foram: Loricariidae (65,4%, Pimelodidae (42,9% Cichlidae (22%, Characidae (7,3%, Erythrinidae (3,9%, Synbranchidae (2

  8. Remoção do herbicida glifosato utilizando carvão ativado impregnado com compostos metálicos de prata e cobre para a melhoria da qualidade da água

    OpenAIRE

    2016-01-01

    Com a crescente utilização de diversos pesticidas na agricultura, incluindo o Glifosato que é o herbicida mais consumido mundialmente, há a necessidade de desenvolvimento de tratamentos de água diversificados e eficazes. Como tratamento alternativo, a remoção do glifosato da água pode ser obtida com a utilização do carvão ativado impregnado com metais para potencializar seus resultados. Portanto, o presente trabalho visou a remoção do herbicida glifosato por meio de um processo de adsorção ut...

  9. Entre o Épico e o Lírico: Os Limites da Criação Poética em "Invenção de Orfeu" de Jorge de Lima

    OpenAIRE

    CAVALCANTI, Luciano Marcos Dias

    2009-01-01

    Neste texto, pretendemos analisar a forma como Jorge de Lima se utiliza do épico e do lírico na construção de Invenção de Orfeu. Nessa perspectiva, a poesia limiana priorizará o ato da criação livre rompendo com o significado comum aplicado a estes gêneros poéticos.In this text, we intend to analyze how Jorge de Lima uses the epic and the lyric to elaborate Invenção de Orfeu. In this perspective, Jorge de Lima’s poetry gives priority to the act of free creation breaching to the meaning common...

  10. Duas poéticas, dois olhares sobre o Barroco

    Directory of Open Access Journals (Sweden)

    Rogério Barbosa da Silva

    1998-12-01

    Full Text Available Resumo: Este ensaio pretende estudar relações existentes entre as poéticas de Affonso Ávila e Haroldo de Campos no contexto da poesia contemporânea, compreendendo o sentido que o Barroco adquiriu em suas produções criativas e críticas. Palavras-chave: experimentalismo, poesia concreta, Barroco, poesia crítica

  11. Uma possível cartografia poética

    OpenAIRE

    2013-01-01

    Resumo: Esta dissertação intenta analisar a poesia paranaense presente nas Antologias publicadas por ocasião da realização do Concurso Helena Kolody, entre os anos de 1990 e 1995. Para realizar a análise, primeiro foram percebidos os tipos de poesia em cada Antologia, para depois serem demarcados "territórios" comuns ou próximos, compondo uma cartografia poética. Para suplantar a análise foram necessárias concepções teóricas sobre a poesia de 1990, em especial as abordagens dos professores Be...

  12. Al Berto e a poética do fogo

    OpenAIRE

    Kenedi Santos Azevedo

    2013-01-01

    O fogo, do latim focus, conota uma multiplicidade de imagens levadas sempre para a intensidade, para o extremo, porque por si só, o fogo é exuberante, fascinante, encantador, deriva-se em chamas, calor, brasa, paixão, erotismo, lume, incêndio e, na arte, uma imaginação ardente. A partir dessas considerações, pretende-se mostrar que a obra do poeta português Al Berto, Horto de Incêndio, relaciona-se com a imagem poética do fogo, desdobrando-se ora em sexualidade, por meio da erotização da pala...

  13. Ergonomia nos dispositivos poéticos

    OpenAIRE

    Vasconcelos, Edmilson

    2004-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção. O presente estudo busca na Ergonomia a solução para uma problemática constatada na relação entre o espectador e as obras de arte participo-interativas da arte contemporânea - os dispositivos poéticos. Esta problemática vai, desde a destruição das obras através de participações conflituosas, até a inadequações institucionais de agentes oficiais do Sistema...

  14. Protease activated receptors (PARS) mediation in gyroxin biological activity; Mediacao dos receptores ativados por proteases (PARs) em atividades biologicas da giroxina

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jose Alberto Alves da

    2009-07-01

    Gyroxin is a serine protease enzyme from the South American rattlesnake (Crotalus durissus terrificus) venom; it is only partially characterized and has multiple activities. Gyroxin induces blood coagulation, blood pressure decrease and a neurotoxic behavior named barrel rotation. The mechanisms involved in this neurotoxic activity are not known. Whereas gyroxin is a member of enzymes with high potential to become a new drug with clinical applications such as thrombin, batroxobin, ancrod, tripsyn and kalicrein, it is important to find out how gyroxin works. The analysis on agarose gel electrophoresis and circular dichroism confirmed the molecules' integrity and purity. The gyroxin intravenous administration in mice proved its neurotoxicity (barrel rotation). In vivo studies employing intravital microscopy proved that gyroxin induces vasodilation with the participation of protease activated receptors (PARs), nitric oxide and Na+K+ATPase. The leukocytes' adherence and rolling counting indicated that gyroxin has no pro inflammatory activity. Gyroxin induced platelet aggregation, which was blocked by inhibitors of PAR1 and PAR4 receptors (SCH 79797 and tcY-NH{sub 2}, respectively). Finally, it was proved that the gyroxin temporarily alter the permeability of the blood brain barrier (BBB). Our study has shown that both the protease-activated receptors and nitric oxide are mediators involved in the biological activities of gyroxin. (author)

  15. Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol

    OpenAIRE

    2016-01-01

    As células a combustível de etanol direto (DEFCs, Direct Ethanol Fuel Cells) são baseadas na eletro-oxidação do etanol à baixa temperatura e necessitam catalisadores à base de metais nobres, devido à cinética mais lenta para as reações de oxi-redução. Entre os catalisadores, a platina e as ligas de platina são os mais utilizados. Materiais para suportar os catalisadores são necessários a fim de reduzir a carga do mesmo empregada. Um dos suportes de catalisadores mais versáteis é o carvão ativ...

  16. Identificação de resíduos de aminoácidos importantes para a ativação de NifA po PII em Herbaspirillum seropedicae

    OpenAIRE

    Stefanello, Adriano Alves

    2014-01-01

    Resumo: Herbaspirillum seropedicae (?-Proteobacteria) é um diazotrofo encontrado em associação com gramíneas de interesse econômico, como milho e cana-de-açúcar. A fixação de nitrogênio em H. seropedicae é controlada a nível transcricional pela proteína NifA. NifA é inativa sob alta concentração de nitrogênio fixado, e essa sensibilidade é atribuída ao domínio N-terminal. A desrepressão de NifA depende da interação de seu domínio N-terminal com a proteína GlnK, pertencente à família das prote...

  17. Identificação de resíduos de aminoácidos importantes para a ativação de NifA po PII em Herbaspirillum seropedicae

    OpenAIRE

    Stefanello, Adriano Alves

    2014-01-01

    Resumo: Herbaspirillum seropedicae (?-Proteobacteria) é um diazotrofo encontrado em associação com gramíneas de interesse econômico, como milho e cana-de-açúcar. A fixação de nitrogênio em H. seropedicae é controlada a nível transcricional pela proteína NifA. NifA é inativa sob alta concentração de nitrogênio fixado, e essa sensibilidade é atribuída ao domínio N-terminal. A desrepressão de NifA depende da interação de seu domínio N-terminal com a proteína GlnK, pertencente à família das prote...

  18. Role of PO4 tetrahedron in LiFePO4 and FePO4 system.

    Science.gov (United States)

    Zeng, Yuewu

    2015-06-01

    Using high resolution transmission electron microscopy with image simulation and Fourier analysis, the Li1- x FePO4 (x LiFePO4 and FePO4 resulting from spinodal decomposition which promote Li ion easily getting into the particle due to uphill diffusion, (3) the particles of FePO4 formed in charging have heavily distorted lattice and contain some isolated LiFePO4 , (4) interface between LiFePO4 and FePO4 and between amorphous and crystal region provides the lattice distortion of small polarons.

  19. A Facile Route for Synthesis of LiFePO4/C Cathode Material with Nano-sized Primary Particles

    Institute of Scientific and Technical Information of China (English)

    肖政伟; 胡国荣; 杜柯; 彭忠东

    2014-01-01

    A facile and practical route was introduced to prepare LiFePO4/C cathode material with nano-sized primary particles and excellent electrochemical performance. LiH2PO4 was synthesized by using H3PO4 and LiOH as raw materials. Then, as-prepared LiH2PO4, reduced iron powder andα-D-glucose were ball-milled, dried and sin-tered to prepare LiFePO4/C. X-ray diffractometry was used to characterize LiH2PO4, ball-milled product and LiFePO4/C. Differential scanning calorimeter-thermo gravimetric analysis was applied to investigate possible reac-tions in sintering and find suitable temperature for LiFePO4 formation. Scanning electron microscopy was em-ployed for the morphology of LiFePO4/C. As-prepared LiH2PO4 is characterized to be in P21cn(33) space group, which reacts with reduced iron powder to form Li3PO4, Fe3(PO4)2 and H2 in ball-milling and sintering. The appro-priate temperature for LiFePO4/C synthesis is 541.3-976.7 °C. LiFePO4/C prepared at 700 °C presents nano-sized primary particles forming aggregates. Charge-discharge examination indicates that as-prepared LiFePO4/C displays appreciable discharge capacities of 145 and 131 mA·h·g-1 at 0.1 and 1 C respectively and excellent discharge ca-pacity retention.

  20. RbYb(PO34

    Directory of Open Access Journals (Sweden)

    Hui Chen

    2013-01-01

    Full Text Available Rubidium ytterbium(III tetrakis(polyphosphate, RbYb(PO34, was synthesized by solid-state reaction. It adopts structure type IV of the MRE(PO34 (M = alkali metal and RE = rare earth metal family of compounds. The structure is composed of a three-dimensional framework made up from double spiral polyphosphate chains parallel to [10-1] and irregular [YbO8] polyhedra. There are eight PO4 tetrahedra in the repeat unit of the polyphosphate chains. The Rb+ cation is located in channels extending along [100] that are delimited by the three-dimensional framework. It is surrounded by 11 O atoms, defining an irregular polyhedron.

  1. LiDy(PO34

    Directory of Open Access Journals (Sweden)

    Fathia Chehimi-Moumen

    2008-07-01

    Full Text Available Single crystals of lithium dysprosium polyphosphate, LiDy(PO34, were prepared by the flux method. The atomic arrangement is built up by infinite (PO3n chains extending along the b axis. Dy3+ and Li+ cations alternate in the middle of four such chains, with Dy...Li distances of 3.54 (1 and 3.48 (1 Å. The DyO8 dodecahedra and LiO4 tetrahedra deviate significantly from the ideal geometry. Both Dy and Li occupy special positions (Wyckoff position 4e, site symmetry 2.

  2. Pré-tratamento de lixiviados de aterros sanitários por filtração direta ascendente e coluna de carvão ativado Landfill leachate pre-treatment by upflow direct filtration and column of activated carbon

    Directory of Open Access Journals (Sweden)

    Armando Borges de Castilhos Junior

    2010-12-01

    Full Text Available Vários problemas ambientais no Brasil decorrem do acelerado crescimento dos setores produtivos e, consequentemente, da multiplicidade dos resíduos sólidos urbanos gerados. A disposição destes em aterros sanitários é prática comum; entretanto, essa deposição requer medidas de proteção ambiental, incluindo o tratamento dos lixiviados. Este trabalho, conduzido em filtros de areia e coluna de carvão ativado, trata de proposta de tratamento físico-químico do lixiviado como alternativa ao processo biológico. No que se refere ao processo de filtração, observaram-se reduções de até 74% para DQO, 47% para DBO, 93% para cor, 90% para amônia e aumento de 0,3 para 0,9 na relação DBO5/DQO. Constataram-se limitações com relação à duração das carreiras de filtração, para o que se sugere avaliar outras granulometrias de areia e até mesmo tecnologias de tratamento.Several environmental problems in Brazil are due to the rapid growth of various productive sectors, and the resulting qualitative multiplicity of municipal solid waste that are generated. The disposal of solid waste in landfills is a common practice; however, it requires environment protection measures, including the treatment of leachate. This work conducted in sand filters and activated carbon column refers to physical and chemical treatment of leachate as an alternative to the biological process. Regarding the filtration process, the results showed reductions of up to 74% for COD, 47% for BOD, 93% for color, 90% for ammonia and an increase from 0.3 to 0.9 in BOD5/COD relation. Limitations were found in relation to filtration run, which suggests the evaluation of other size grains and even treatment technologies.

  3. Hidrolisados protéicos de arroz com baixo teor de finilalanina, obtidos pela ação da corolase PP e uso do carvão ativado Rice protein hydrolysates with low phenylalanine content, prepared by the action of corolase PP and the use of activated carbon

    Directory of Open Access Journals (Sweden)

    Carolina Schaper Bizzotto

    2006-04-01

    Full Text Available A partir do extrato protéico obtido em meio alcalino, empregou-se a corolase PP no preparo de seis hidrolisados enzimáticos de arroz, visando o desenvolvimento de formulações dietéticas para fenilcetonúricos. O procedimento de passagem por coluna contendo carvão ativado foi utilizado na remoção de fenilalanina (Phe dos hidrolisados. O teor de Phe nos extratos protéicos de arroz e seus hidrolisados, após tratamento com carvão, foi determinado por espectrofotometria derivada segunda. O teor final de fenilalanina nos hidrolisados variou de 0,39 a 68,34 mg 100 g-1, o que corresponde a uma remoção de 84 a 100%. A distribuição dos peptídeos nas amostras, de acordo com o tamanho da cadeia, foi estudada como um dos critérios para a avaliação da qualidade nutricional dos hidrolisados. O fracionamento dos peptídeos foi realizado por CLAE de exclusão molecular e, para a quantificação empregou-se o método rápido da área corrigida da fração. Os resultados indicaram que o maior teor de oligopeptídeos foi obtido quando se empregou a corolase PP em uma relação E:S de 1%, e uma concentração protéica inicial de 1,56 g 100 mL-1.Starting with alkaline protein extract, the Corolase PP was used for preparing six enzymatic rice hydrolysates, with the aim of producing dietary formulations for phenylketonuria treatment. A column containing activated pure charcoal was used for removing phenylalanine (Phe. The Phe contents of rice protein extract and hydrolysates were determined by second derivative spectrophotometry. The final Phe content of the hydrolysates varied from 0.39 to 68.34 mg 100 g-1, corresponding to removal levels from 84% to 100%. The distribution of peptides according to their size was used as an approach for the nutritional evaluation of the hydrolysates. The fractionation of peptides was performed by size-exclusion HPLC, and the rapid correct fraction area method was used for the their quantification. The results

  4. Ampliando as possibilidades de compreensão psicológica na clínica em saúde pública a partir da imaginação poética de Bachelard

    Directory of Open Access Journals (Sweden)

    Rafael Auler de Almeida Prado

    2011-01-01

    Full Text Available La creciente participación de psicólogos en la salud pública ha traído algunas cuestiones, tales como la insuficiencia de sus prácticas tradicionales en las actividades de esta área. Esta investigación tuvo como objetivo proponer nuevas posibilidades para la comprensión de la clínica psicológica en el servicio público de la salud a través de la literatura y de la reflexión teórica con ilustración de casos clínicos. Teniendo en cuenta la psicología en su formato modular y racionalista, centrado tradicionalmente en la atención a la elite socioeconómica, no debe sorprender las dificultades de los psicólogos en el servicio público de la salud, cuya principal clientela es de bajos ingresos además de no tener familiaridad con el pensamiento intelectual académico. El servicio público todavía debe estar preparado para servir a una clientela cada vez más diversificada, tanto en términos de estatus socioeconómico cuanto en los referenciales culturales. La novedad de una clínica inspirada en la poética, que hace referencia a la lengua, a la forma de ser, y de escuchar, es permitir la apertura a la comprensión de cualquier paciente, independiente de su clase socio-cultural. Por lo tanto no es la proposición de una nueva técnica psicoterapéutica dirigida a una clase social en particular tampoco a un único sitio de la acción psicológica. Más bien pretende, a través de un nuevo lenguaje, permitir a la comprensión psicológica lanzarse más allá de su condición modular actual.

  5. CsMgPO4

    Directory of Open Access Journals (Sweden)

    Nikolay S. Slobodyanik

    2009-08-01

    Full Text Available Caesium magnesium orthophosphate is built up from MgO4 and PO4 tetrahedra (both with . m. symmetry linked together by corners, forming a three-dimensional framework. The Cs atoms have .m. site symmetry and are located in hexagonal channels running along the a- and b-axis directions.

  6. A utilização de mini-estações de tratamento de esgoto em residências

    Directory of Open Access Journals (Sweden)

    Nícolas Fernandes Martins

    2013-09-01

    Full Text Available O presente trabalho tratará do desenvolvimento de um protótipo de estação detratamento de esgoto (ETE, sendo um protótipo onde foram analisados dadosquímicos e levantamento da microfauna do lodo ativado.  Foram analisados antes eapós o tratamento do protótipo dados referentes à Demanda Bioquímica de Oxigênio(DBO, Nitrogênio Amoniacal, fosfato, óleos e graxas, ph e espectrofotometria. É oprimeiro trabalho que utiliza medidas de espectrofotometria em analises de águastratadas. Todos os resultados comprovam que a estação de tratamento pode ser eficazem residências que não possuem tratamento de esgoto. Foram realizadas plantas parainstalação de uma estação de tratamento em residências.

  7. Poésie et politique

    OpenAIRE

    Artières,Philippe; Avanza, Martina; Baranova, Tatiana Debbagi; Belalimat, Nadia; Bourdin, Alain; Callac, Emmanuelle; Clément, Fabrice; Čolović, Ivan; Dragomir, Lucia; Huhn, Rosemarie; Martel, Philippe; Morel, Alain

    2005-01-01

    Qu'il s'agisse de poésie officielle, révolutionnaire, protestataire ou partisane ou encore du rôle des poètes dans la vie quotidienne de la cité, ce sont les usages sociaux et politiques de la poésie aujourd'hui sont au centre de ce dossier.

  8. Eficiência da aplicação em pré-plantio, de glifosato isolado ou em mistura no consórcio de poáceas anuais e fabáceas perenes, na Região Sul do Paraná

    OpenAIRE

    Gonçalves, Jean Sander

    2012-01-01

    Em trabalho realizado no Centro de Estações Experimentais do Canguiri da UFPR, localizada no município de Pinhais, avaliou-se o desempenho do Sorgo (Sorghum vulgare, Pers.) no verão e do consórcio de Aveia Preta (Avena strigosa, Screb), Azevém (Lolium multiflorum, L.), Trevo Branco (Trifolium repens, L.) e Trevo vermelho (Trifolium pratense, L.) no inverno. Nos quais aplicaram-se dez tratamentos com glifosato, glifosato + 2,4-D e glifosato + 2,4-D + picloram em pré-plantio, através do sistema...

  9. Eficiência da aplicação em pré-plantio, de glifosato isolado ou em mistura no consórcio de poáceas anuais e fabáceas perenes, na Região Sul do Paraná

    OpenAIRE

    Gonçalves, Jean Sander

    2012-01-01

    Em trabalho realizado no Centro de Estações Experimentais do Canguiri da UFPR, localizada no município de Pinhais, avaliou-se o desempenho do Sorgo (Sorghum vulgare, Pers.) no verão e do consórcio de Aveia Preta (Avena strigosa, Screb), Azevém (Lolium multiflorum, L.), Trevo Branco (Trifolium repens, L.) e Trevo vermelho (Trifolium pratense, L.) no inverno. Nos quais aplicaram-se dez tratamentos com glifosato, glifosato + 2,4-D e glifosato + 2,4-D + picloram em pré-plantio, através do sistema...

  10. Uma oficina poética de lembranças

    Directory of Open Access Journals (Sweden)

    Douglas Valeriano Pompeu

    2014-08-01

    que nela se encontra em constante discussão uma prática e conceito de arquivo que atravessa e se reflete em todo o procedimento criativo de Sebald. Durante a análise do material referente a Austerlitz, ao acentuar o papel da semelhança e da analogia em sua prática enquanto colecionador de imagens, a proposta é apontar o interesse do autor pelo problema do olhar, da percepção visual e da representação que, por fim, aproxima seu procedimento poético ao da bricolagem praticada por artistas conhecidos como outsiders.

  11. Structural and Electrical Properties of Lithium-Ion Rechargeable Battery Using the LiFePO4/Carbon Cathode Material.

    Science.gov (United States)

    Kim, Young-Sung; Jeoung, Tae-Hoon; Nam, Sung-Pill; Lee, Seung-Hwan; Kim, Jea-Chul; Lee, Sung-Gap

    2015-03-01

    LiFePO4/C composite powder as cathode material and graphite powder as anode material for Li-ion batteries were synthesized by using the sol-gel method. An electrochemical improvement of LiFePO4 materials has been achieved by adding polyvinyl alcohol as a carbon source into as-prepared materials. The samples were characterized by elemental analysis (EA), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-EM). The chemical composition of LiFePO4/C powders was in a good agreement with that of the starting solution. The capacity loss after 500 cycles of LiFePO4/C cell is 11.1% in room temperature. These superior electrochemical properties show that LiFePO4/C composite materials are promising candidates as cathode materials.

  12. Comportamento do reator seqüencial em batelada (RSB) sob estado estacionário dinâmico utilizando idade do lodo como parâmetro de controle operacional

    OpenAIRE

    Altemar Vilar dos Santos

    2005-01-01

    O reator seqüencial em batelada (RSB) é uma variante de lodos ativados capaz de promover a remoção da matéria orgânica, a remoção dos nutrientes e a separação da fase sólida da líquida em uma unidade. A valorização das áreas urbanas, a carência de tratamento terciário e a crescente necessidade de redução nas dimensões de estações de tratamento de esgoto devem impulsionar o desenvolvimento de pesquisas sobre RSB em curto espaço de tempo. A partir deste cenário, o presente trabalho teve como ob...

  13. Požarna varnost lesenih konstrukcij

    OpenAIRE

    Štupnik, Igor

    2016-01-01

    Namen diplomske naloge je prikaz postopkov izračuna požarne varnosti lesenih konstrukcij. Predstavljeni so predlogi izboljšave izračunov po standardu SIST EN 1995-1-2, ki temeljijo na požarnih testih in so opisani v Evropskih tehničnih smernicah. Praktični izračuni so prikazani na primerih lesenih elementov Vrtca Preddvor.

  14. A poética televisual de Samuel Beckett

    Directory of Open Access Journals (Sweden)

    Gabriela Borges

    2008-11-01

    Full Text Available Este artigo analisa a trajetória criativa de Samuel Beckett desde a literatura até os meios audiovisuais, enfatizando a criação de sua poética televisual. A busca pela desconstrução da linguagem e por formas abstratas que contivessem um mí­nimo expressivo leva Beckett a se interessar pelos meios eletrônicos e a usar as suas ferramentas, como a câmera, os recursos de áudio e edição, para criar uma poética tecnológica que prima pelo desdobramento intertextual na construção dos personagens e no tratamento de temas como a memória, a percepção, a repetição e a fragmentação. Em seus experimentos nos meios eletrônicos, Beckett amplia a capacidade de comunicação da televisão ao explorar o seu potencial estético e artí­stico e forçar os limites da representação em seus constantes enquadramentos. Palavras-chave Samuel Beckett, poética televisual, intertextualidade Abstract This article analyses Samuel Beckett's creative path from literary to audiovisual works, enhancing the creation of his televisual poetics. His search for deconstructing language and for abstract forms leads him to work with electronic media and make use of its tools, such as camera, audio and editing resources. The intertextuality emerges from the development of characters and the use of themes such as memory, perception, repetition and fragmentation. Through his experiments with television, Beckett amplifies its capacity of communication, exploring its aesthetic and artistic potential and forcing its limits of representation. Key words

  15. Use of sawdust Eucalyptus sp. in the preparation of activated carbons Utilização de serragem de Eucalyptus sp. na preparação de carvões ativados

    Directory of Open Access Journals (Sweden)

    Gabriela Martucci Couto

    2012-02-01

    Full Text Available Wood sawdust is a solid residue, generated in the timber industry, which is of no profitable use and can cause serious environmental problems if disposed inadequately. The aim of this study was to use the eucalyptus sawdust in the preparation of activated carbons AC and test them as adsorbents of methylene blue (MB and phenol, representative pollutants from aqueous effluents of various industries. The eucalyptus sawdust was characterized by instrumental analysis such as elementary analysis (CHNS-O, thermogravimetric analysis (TGA, infrared spectroscopy (FTIR and scanning electron microscopy (SEM. The activated carbons were prepared by physical activation with carbon dioxide AC_CO2, (10º C min-1, 850º C, 1h and by chemical activation with potassium carbonate AC_K2CO3 (10º C min-1, 850º C, 3h. The AC_CO2 and AC_K2CO3 were characterized by CHN-O, TGA, FTIR, N2 adsorption/desorption (BET to evaluate the specific surface area and SEM. The resulting activated carbons were tested for their ability to adsorb MB and phenol in water. The activated carbons produced in this work were predominantly microporous and showed specific surface area of about 535 m² g-1. The AC_K2CO3 was more effective in the adsorption of MB (81 mg g-1 and phenol (330 mg g-1 than AC_CO2 (32 mg g-1 and 172 mg g-1, respectively, for MB and phenol.A serragem é um resíduo sólido, gerado na indústria madeireira, que não tem uso rentável e pode causar sérios problemas ambientais quando disposta inadequadamente. Neste estudo, objetivou-se utilizar a serragem de eucalipto na preparação de carvões ativados (AC e testá-los como adsorventes do corante azul de metileno (MB e fenol; moléculas que representam poluentes de efluentes industriais. A serragem de eucalipto foi caracterizada por análises instrumentais, tais como: análise elementar (CHNS-O, análise termogravimétrica (TGA, espectroscopia na região do infravermelho (FTIR e microscopia eletrônica de varredura (SEM

  16. Trois poètes corses

    Directory of Open Access Journals (Sweden)

    2012-06-01

    Full Text Available On doit les traductions de ces poèmes (y compris des siens au poète Francescu-Micheli Durazzo qui œuvre avec obstination pour la poésie corse (A filetta, onze poètes corses contemporains, aux éditions Phi ; et le numéro spécial « Poètes corses » de la revue basque Zurgai, Bilbao, avec une très éclairante préface du même. Je me suis permis une ou deux très minimes interventions dues à ma sensibilité personnelle ; elles traduisent, sous une forme moins parfaite que la sienne, mon souci de col...

  17. Redetermination of AgPO(3).

    Science.gov (United States)

    Terebilenko, Katherina V; Zatovsky, Igor V; Ogorodnyk, Ivan V; Baumer, Vyacheslav N; Slobodyanik, Nikolay S

    2011-02-09

    Single crystals of silver(I) polyphosphate(V), AgPO(3), were prepared via a phospho-ric acid melt method using a solution of Ag(3)PO(4) in H(3)PO(4). In comparison with the previous study based on single-crystal Weissenberg photographs [Jost (1961 ▶). Acta Cryst. 14, 779-784], the results were mainly confirmed, but with much higher precision and with all displacement parameters refined anisotropically. The structure is built up from two types of distorted edge- and corner-sharing [AgO(5)] polyhedra, giving rise to multidirectional ribbons, and from two types of PO(4) tetra-hedra linked into meandering chains (PO(3))(n) spreading parallel to the b axis with a repeat unit of four tetra-hedra. The calculated bond-valence sum value of one of the two Ag(I) ions indicates a significant strain of the structure.

  18. Redetermination of AgPO3

    Science.gov (United States)

    Terebilenko, Katherina V.; Zatovsky, Igor V.; Ogorodnyk, Ivan V.; Baumer, Vyacheslav N.; Slobodyanik, Nikolay S.

    2011-01-01

    Single crystals of silver(I) polyphosphate(V), AgPO3, were prepared via a phospho­ric acid melt method using a solution of Ag3PO4 in H3PO4. In comparison with the previous study based on single-crystal Weissenberg photographs [Jost (1961 ▶). Acta Cryst. 14, 779–784], the results were mainly confirmed, but with much higher precision and with all displacement parameters refined anisotropically. The structure is built up from two types of distorted edge- and corner-sharing [AgO5] polyhedra, giving rise to multidirectional ribbons, and from two types of PO4 tetra­hedra linked into meandering chains (PO3)n spreading parallel to the b axis with a repeat unit of four tetra­hedra. The calculated bond-valence sum value of one of the two AgI ions indicates a significant strain of the structure. PMID:21522230

  19. Remoção do ácido mefenâmico em água utilizando carvão ativado em pó, lama vermelha e oxidação com cloro

    Directory of Open Access Journals (Sweden)

    Rodrigo B. Moruzzi

    2014-01-01

    Full Text Available The use of activated carbon powder (ACP, red mud and oxidation with chlorine to remove mefenamic acid in water are described, aimed at their application as a complement to sewage treatment processes in Brazil. A study on the behavior of mefenamic acid in water was performed by evaluating its dissolution for different concentrations and times. Subsequently, the optimal conditions for removal of mefenamic acid were investigated using ACP adsorption at different pH and concentrations, and red mud adsorption using different pH. The utilization of different pH and times was also investigated to establish the ideal conditions for chemical oxidation of the drug. Among the different conditions studied, the best condition for drug removal by ACP and red mud were 100% and 96%, respectively, while the best condition for chemical oxidation occurred using solutions with pH 6 and 7 and reaction times of 30 and 60 minutes.

  20. Study of Rn-222 exhalation in phosphogypsum through the adsorption technique in activated coal; Estudo da exalacao de Rn-222 em fosfogesso por meio da tecnica de adsorcao em carvao ativado

    Energy Technology Data Exchange (ETDEWEB)

    Nisti, Marcelo Bessa; Campos, Marcia Pires de, E-mail: mbnisti@ipen.b, E-mail: mpcampos@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-10-26

    The radon exhalation was estimated through the adsorption in activated carbon technique. Classified as TENORM, the radon exhalation determination on the phosphogypsum piles was performed through the adsorption ratio of radon in activated carbon, from the concentration of descendants of {sup 222}Rn, {sup 214}Pb and {sup 214}Bi obtained by gamma spectrometry. The results obtained in this work were compatibles with the values found in the literature

  1. Ultraviolet luminescence of ScPO4, AlPO4 and GaPO4 crystals.

    Science.gov (United States)

    Trukhin, Anatoly N; Shmits, Krishjanis; Jansons, Janis L; Boatner, Lynn A

    2013-09-25

    The luminescence of self-trapped excitons (STEs) was previously observed and described for the case of tetragonal-symmetry ScPO4 single crystals. The subject band in this material is situated in the UV spectral range of ∼210 nm or ∼5.8 eV. In the present work, we are both expanding this earlier luminescence study and seeking to identify similar luminescence phenomena in other orthophosphate crystals, i.e., AlPO4 and GaPO4. These efforts have proven to be successful--in spite of the structural differences between these materials and ScPO4. Specifically we have found that for AlPO4 and GaPO4, in addition to an α-quartz-like STE, there is a UV luminescence band that is similar in position and decay properties to that of ScPO4 crystals. Potentially this represents an STE in AlPO4 and GaPO4 crystals that is analogous to the STE of ScPO4 and other orthophosphates. The decay kinetics of the UV luminescence of ScPO4 was studied over a wide temperature range from 8 to 300 K, and they exhibited some unusual decay characteristics when subjected to pulses from an F2 excimer laser (157 nm). These features could be ascribed to a triplet state of the STE that is split in a zero magnetic field. A fast decay of the STE was detected as well, and therefore, we conclude that, in addition to the slow luminescence corresponding to a transition from the triplet state, there are singlet-singlet transitions of the STE. Time-resolved spectra of the slow and fast decay exhibit a small shift (∼0.15 eV) indicating that the singlet-triplet splitting is small and the corresponding wavefunction of the STE is widely distributed over the atoms of the ScPO4 crystal where the STE is created.

  2. Superconducting Coil of Po Dipole

    CERN Multimedia

    1983-01-01

    The Po superconducting dipole was built as a prototype beam transport magnet for the SPS extracted proton beam P0. Its main features were: coil aperture 72 mm, length 5 m, room-temperature yoke, NbTi cable conductor impregnated with solder, nominal field 4.2 T at 4.7 K (87% of critical field). It reached its nominal field without any quench.After this successful test up to its nominal field of 4.2 T, the power was not raised to reach a quench. The magnet was not installed in a beam and had no other further use. Nevertheless its construction provided knowledges and experience which became useful in the design and construction of the LHC magnets. The photo shows a detail of the inner layer winding before superposing the outer layer to form the complete coil of a pole. Worth noticing is the interleaved glass-epoxy sheet (white) with grooved channels for the flow of cooling helium. See also 8211532X.

  3. The small mammals of an upper piedmontese Po plain site (Leinì, Turin prov. / La micromammalofauna di una stazione planiziaria piemontese

    Directory of Open Access Journals (Sweden)

    Giuseppe Osella

    1986-12-01

    Full Text Available Abstract The 24 small mammals listed as living in Leinì (Piedmontese Po plain, near Turin, 245 m on sea level (only the red fox, <em>Vulpes vulpesem> is not sure, are briefly analysed (Chiroptera excepted. List and analysis are the results of studies pursued for about 35 years. However, in Verona's Museum of Natural History, the housed materials are related to the last eighteen years (1966-1984 (Tab. I. For a complete analysis, this fauna is compared with the Veronese Po plain one, especially with the Busatello one (Gazzo Veronese-Ostiglia. This site is a stretch of marshes named "Valli Grandi Veronesi and Ostigliesi" (Tab. II. In this analysis, if we don't consider the not native species (<em>Myocastor coypusem> and <em>Mustela visonem>, the estinguished species (<em>Lutra lutraem>, the Mediterranean species (living only along the border of the Po plain basin (<em>Suncus etruscusem> and the hunting species (<em>Lepus europaeusem> and <em>Oryctolagus cuniculusem> we have 23 taxa for Lein and only 17 and 13, respectively, for Veronese Po plain and Busatello. The richer small mammal fauna of the Piedmontese Po plain is, above all, supported by different ecological conditions but the preservation of some species (e.g. <em>Glis glisem> and <em>Muscardinus avellanariusem> in Leinì is surely related also to historical problems and to a land anthropization pushed forward to a lesser degree. Riassunto Vengono elencate e brevemente commentate tutte le specie di micromammiferi presenti a Leinì (Torino, Chirotteri esclusi. Si tratta di un complesso di 24 specie (solo la volpe non è del tutto sicura per ognuna delle quali gli autori, sinteticamente, espongono le osservazioni raccolte in circa 35 anni. A maggior chiarimento del significato faunistico del popolamento, viene presa in esame anche la micromammalofauna della pianura padano veneta, precisamente la pianura veronese ed in particolar modo la

  4. Crescimento inicial de mangabeira (Hancornia speciosa Gomes em diferentes meios de germinação in vitro Initial growth of mangabeira (Hancornia speciosa Gomes in different culture medium of in vitro germination

    Directory of Open Access Journals (Sweden)

    Ana da Silva Lédo

    2007-08-01

    Full Text Available O objetivo do trabalho foi determinar as condições mais favoráveis para a germinação in vitro de sementes e o crescimento inicial de plântulas de mangabeira. Após assepsia, sementes oriundas de frutos maduros foram inoculadas em tubos de ensaio contendo os seguintes tratamentos: T1-15 mL de meio de cultura MS; T2-15 mL de meio de cultura MS + 2,0 g L-1 de carvão ativado; T3-15 mL de meio de cultura ½ MS; e T4-15 mL de meio de cultura ½ MS + 2,0 g L-1 de carvão ativado. Todos os meios de cultura foram gelificados com 0,3 g L-1 de Phytagel® e suplementados com 3,0 g L-1 de sacarose. O experimento foi instalado em delineamento inteiramente casualizado com quatro tratamentos e oito repetições, sendo cada parcela experimental composta de dez tubos de ensaio contendo uma semente cada. Não houve diferença significativa dos tratamentos para a porcentagem de germinação aos 20 dias, que variou de 95 a 100%. Quanto ao comprimento da raiz principal, observou-se que o meio de cultura constituído de ½ MS com 2,0 g L-1 de carvão ativado proporcionou maior crescimento quando comparado com os demais tratamentos. Aos 50 dias, não foi observada a formação de plântulas anormais e nem diferenças significativas do comprimento da parte aérea das plântulas. Entretanto, a diluição em 50% dos sais do meio MS associada à presença de carvão ativado induziu maior crescimento da raiz principal (8,50 cm quando comparado com meio MS, na presença (6,19 cm ou ausência (6,00 cm de carvão ativado.The objective of this study was to determine the most favorable conditions for the in vitro germination of mangaba seeds and initial development of plantlets. After asepsis, emerging seeds of mature fruits were inoculated in tubes contend the next treatments: T1-15 mL of MS culture medium; T2-15 mL of MS culture medium + 2.0 g L-1 of activated charcoal; T3-15 mL of ½ MS culture medium; and T4-15 mL of ½ MS culture medium + 2.0 g L-1 of activated

  5. A modernidade da prosa poética do Livro do desassossego, de Fernando Pessoa

    OpenAIRE

    Coronel,Luciana Paiva

    2011-01-01

    O livro do desassossego constitui obra privilegiada para a análise das contradições da modernidade. A inovação contida na forma fragmentária desta prosa poética incorpora com freqüência em seu interior momentos nos quais se evidencia uma visão de mundo passadista e impregnada de um misticismo de teor romântico. Traços modernos e antimodernos convivem neste livro indefinível cuja análise pretende iluminar muitas das ambigüidades da vida moderna que Fernando Pessoa pretendeu recriar em sua poes...

  6. Sonetos de uma palavra, de Seymour Mayne: fragmentos e expansões poéticas

    Directory of Open Access Journals (Sweden)

    Alexandre Daniel de S. Feldman

    2013-10-01

    Full Text Available O Word Sonnet, traduzido por Soneto de uma palavra, é uma variante da forma tradicional de soneto. Há críticos que são completamente contrários à denominação, uma vez que consideram o soneto em sua forma tradicional e queo fato de se manter catorze linhas não garantiria a estrutura convencional do que pode ser originalmente considerado um soneto. Entretanto, em essência, a estrutura de um poema composto em catorze linhas com uma única palavra em cada verso mostra-se como algo inovador. Sabe-se que o fluir da arte poética não pressupõe obstáculos de estrutura e forma.

  7. El lenguaje poético

    Directory of Open Access Journals (Sweden)

    Alfonso Hanssen

    1966-03-01

    Full Text Available Me parece absurdo pretender hallar la intención poética en cualesquiera rastros de la historia, por el solo hecho de que en ellos se afirma cierta reconditez que los hace misteriosos.

  8. Lifetime measurement in {sup 195}Po

    Energy Technology Data Exchange (ETDEWEB)

    Grahn, T.; Page, R.D. [University of Liverpool, Department of Physics, Oliver Lodge Laboratory, Liverpool (United Kingdom); Dewald, A.; Jolie, J.; Melon, B.; Pissulla, T. [Universitaet zu Koeln, Institut fuer Kernphysik, Koeln (Germany); Greenlees, P.T.; Jakobsson, U.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Nyman, M.; Peura, P.; Rahkila, P.; Saren, J.; Scholey, C.; Sorri, J.; Uusitalo, J. [University of Jyvaeskylae, Department of Physics, P.O. Box 35, Jyvaeskylae (Finland); Kroell, T.; Kruecken, R.; Maierbeck, P. [TU Muenchen, Physik-Department E12, Garching (Germany)

    2009-03-15

    The lifetime of the 17/2{sup +} yrast state in {sup 195}Po has been measured using the recoil distance Doppler-shift technique to be {tau}=43(11) ps. The lifetime was extracted from the singles {gamma}-ray spectra obtained by using the recoil-decay tagging method. The present work provides more information of the coupling schemes, shapes and configuration mixing in neutron-deficient odd-mass Po nuclei. (orig.)

  9. Investigation Of Water Assisted Phase Transformation Process From AlPO4-5 to AlPO4-tridymite

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Suochang; Zhao, Zhenchao; Hu, Mary Y.; Han, Xiuwen; Hu, Jian Z.; Bao, Xinhe

    2016-03-15

    Water assisted phase transformation process from crystalized AlPO4-5 to AlPO4-tridymite was studied by the combination of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and in situ multinuclear MAS NMR. It is found that water first activates the residue amorphous aluminophosphate in crystalized AlPO4-5 sample through hydrolysis and condensation reactions. Then the activated aluminophosphate species reassemble into AlPO4-tridymite crystalline. Meanwhile, AlPO4-5 transforms into orthorhombic phase during heating process. With further crystallization of AlPO4-tridymite, the amorphous phase is gradually consumed, and mass transportation between AlPO4-5 and AlPO4-tridymite is established through gradually amorphization of AlPO4-5. Finally, most of the AlPO4-5 transforms into the thermodynamically stable dense phase AlPO4-tridymite.

  10. Efeitos da exposição aguda a nicotina sobre a atividade da acetilcolinesterase em cérebro do Peixe-Zebra (Danio rerio)

    OpenAIRE

    2009-01-01

    O peixe-zebra (Danio rerio) é um pequeno peixe teleósteo de água doce, pertencente à família Cyprinidae, que pode ser facilmente mantido dentro de aquários em laboratórios. A maioria dos seus genes já é conhecida, e o seu genoma tem uma relação de similaridade com o genoma humano. A nicotina é um alcalóide que está presente nas folhas do tabaco, atua nos receptores colinérgicos nicotínicos centrais e periféricos que são ativados e depois inibidos pela própria droga. A nicotina estimula a libe...

  11. Redes vivas: nexos poéticos mediados pela cerâmica contemporânea

    OpenAIRE

    2011-01-01

    125f. Esta dissertação apresenta uma rede de relações – poéticas, visuais, conceituais, históricas,reflexivas e experienciais – em torno do processo e percurso artístico iniciado em 1990, mas especialmente a pesquisa desenvolvida durante o Mestrado em Artes Visuais, do PPGAV/EBA/UFBA, focada na cerâmica enquanto linguagem visual contemporânea, híbrida,que dialoga com questões associadas ao princípio de rede. Estrutura conceitual, a rede é nãolinear,que neste estudo integra várias dimensões...

  12. Radioactive {sup 210}Po in magnesium supplements

    Energy Technology Data Exchange (ETDEWEB)

    Struminska-Parulska, Dagmara Ida [Gdansk Univ. (Poland). Environmental Chemistry and Radiochemistry Chair

    2016-08-01

    The aim of this pioneer study was to determine polonium {sup 210}Po in the most popular magnesium supplements in Poland and estimate the possible related dose assessment to the consumers. The analyzed magnesium pharmaceutics contained organic or inorganic magnesium compounds; some from natural sources. The objectives of this research were to investigate the naturally occurring {sup 210}Po activity concentrations in magnesium supplements, find the correlations between {sup 210}Po concentration in medicament and magnesium chemical form, and calculate the effective radiation dose connected to analyzed magnesium supplement consumption. The highest {sup 210}Po activity concentrations were determined in mineral tablets made from sedimentary rocks, namely dolomite - 3.84 ± 0.15 mBq g{sup -1} (sample Mg17). The highest annual radiation dose from {sup 210}Po taken with 1 tablet of magnesium supplement per day or with 400 mg of pure Mg daily would come from sample Mg17 (dolomite) - 1.35 ± 0.5 and 8.44 ± 0.33 μSv year{sup -1} respectively.

  13. Una poética del pliegue

    Directory of Open Access Journals (Sweden)

    Ana Porrúa

    2000-11-01

    Full Text Available La producción de Juan Gelman-de Violín y otras cuestiones a Relaciones- puede inscribirse dentro de la poética sesentista caracterizada por la hegemonía de la narración y la apertura del discurso poético al resto de los discursos sociales, pero también establece una compleja relación con las vanguardias históricas. La noción de pliegue permite revisar las articulaciones de este conflicto; como espacio el pliegue separa ambas poéticas, la "coloquialista" y vanguardista, que pueden leerse en el interior del corpus propuesto en estado puro, yuxtapuestas, o bajo la forma del cruce que instala la polémica entre libros o textos de un mismo libro. La idea depliegue como rasgo operatorio permite, por su parte, revisar la relación entre ambas poéticas en el interior de un poema, focalizando la materia, el lenguaje. En este caso la poética vanguardista funciona como cuestionamiento de la linealidad del texto sesentista.

  14. Una poética del pliegue

    Directory of Open Access Journals (Sweden)

    Ana Porrúa

    2001-11-01

    Full Text Available La producción de Juan Gelman-de Violín y otras cuestiones a Relaciones- puede inscribirse dentro de la poética sesentista caracterizada por la hegemonía de la narración y la apertura del discurso poético al resto de los discursos sociales, pero también establece una compleja relación con las vanguardias históricas. La noción de pliegue permite revisar las articulaciones de este conflicto; como espacio el pliegue separa ambas poéticas, la "coloquialista" y vanguardista, que pueden leerse en el interior del corpus propuesto en estado puro, yuxtapuestas, o bajo la forma del cruce que instala la polémica entre libros o textos de un mismo libro. La idea depliegue como rasgo operatorio permite, por su parte, revisar la relación entre ambas poéticas en el interior de un poema, focalizando la materia, el lenguaje. En este caso la poética vanguardista funciona como cuestionamiento de la linealidad del texto sesentista.

  15. Splitting longitudinal-transversal em uma microcavidade semicondutora

    OpenAIRE

    Victor Schmidt Comitti

    2013-01-01

    Neste trabalho investigamos um desdobramento de aproximadamente 0,19 meV no espectro de luminescência do Lower Polariton (LP) em uma microcavidade semicondutora de espessura com um poço quântico de GaAs imerso. Existem algumas causas possíveis para o desdobramento em energia do LP em uma microcavidade. Ao longo da dissertação citamos as principais e, em seguida, tentamos demonstrar por um método de eliminação de hipóteses, baseado em medidas de fotoluminescência, que o fenômeno observado é o...

  16. Forenzika elektronske pošte

    OpenAIRE

    Milorad S. Markagić

    2013-01-01

    U najopštijem smislu digitalna forenzika može se definisati kao skup metoda za prikupljanje, analizu i prezentaciju digitalnih dokaza koji se mogu pronaći na računarima, serverima, u računarskim mrežama, bazama podataka, mobilnim uređajima i svim drugim elektronskim uređajima na kojima se čuvaju podaci. U ovom radu su opisane metode prikupljanja digitalnih dokaza u elektronskoj pošti i njihova analiza. Uvod Elektronska pošta se kao dokazni materijal pojavljuje u velikom broju kako građanskih ...

  17. Convergências do feminino na poética muriliana

    Directory of Open Access Journals (Sweden)

    Daniela Moraes Neves

    2006-06-01

    Full Text Available Pela liberdade feérica e a inteligência sans le secours d’etat major clama o eu poético muriliano, com algum saudosismo e ao mesmo tempo com uma marca única e voz cortante, bem ao estilo daqueles que constroem seu próprio jogo e sua própria arte. Em A Idade do Serrote, obra de memórias, Murilo Mendes confessa sua fascinação pelos mistérios humanos e, em toda a sua poesia, revela nas imagens femininas sua busca de expor em versos os incompreensíveis e complexos caminhos da experiência humana; não apenas através das reflexões de cada poema, mas também na forma assimétrica, fragmentada e de organização conscientemente desordenada de seus versos.

  18. O universo poético de Vitória Basaia

    Directory of Open Access Journals (Sweden)

    Alexandro Uguccioni Romão

    2014-01-01

    Full Text Available A artista plástica Vitória Basaia é capaz de parir mundos usando matérias primas refugadas pela sociedade. A Casa Basaia é o seu local de moradia e também o seu ateliê. A casa se transformou ao longo dos anos em uma espécie de museu. Nesse artigo, sondamos esse universo a partir da análise das obras, materiais, técnicas e preocupações ontológicas da artista relacionadas à criação. Com base em conceitos de autores como Deleuze, Guattari, Bertoloto, Bachelard e Brandão, observamos como a inquietação da artista se converte em programa de arte e constitui o seu universo poético, territorializado na Casa Basaia.

  19. Determination of 210 Po in Water%水中210Po 的分析

    Institute of Scientific and Technical Information of China (English)

    王莉莉; 张晔; 陆月萍; 周彦; 曹钟港

    2013-01-01

      水中痕量210 Po 分析采用的是示踪剂的α能谱分析法。在待分析水样中加入208 Po 示踪剂,以氢氧化铁共沉淀的形式载带钋,在0.5 mol/L 盐酸体系中利用钋对银的高度选择性实现自沉积。利用α谱仪探测系统对样品源测量48 h ,根据钋同位素的对应谱分析210 Po 活度。本文讨论该法与我国现行国标、EML 及 IAEA 分析技术的差异性。%  The determination of 210 Po in water samples was carried out by using of 208 Po tracer with the aid of alpha spectrometry .Adding 208 Po tracer to water samples before preliminary preparation ,the 210 Po and were co-precipitated with iron hydroxide .The polonium were auto-deposited on silver disc by advantage of its high selectiveness in 0 .5 mol/L hydrochloric acid solution .The sample source was counted for 60 hours in al-pha spectrometry system .The determination of 210 Po activity was performed according to different spectra .In addition ,the article discusses the differences of the present analytical method and the national standards ,EML and IAEA methods . 208 Po

  20. SINTESE DA FASE SODALITA COM O USO DO CAULIM DA REGIÃO BORBOREMA-SERIDÓ (RN/PB ATIVADO TERMICAMENTE

    Directory of Open Access Journals (Sweden)

    Cássia Guerra Marques Santos

    2012-10-01

    Full Text Available A fase mineral sodalita foi obtida com sucesso a partir de reações hidrotérmicas com o uso de caulim proveniente da região Borborema-Seridó (RN/PB, hidróxido e carbonato de sódio. Desse modo, o caulim, com granulometria menor que 37 μm, foi tratado inicialmente em diferentes temperaturas. A calcinação foi realizada nas temperaturas de 500, 700 e 900°C com o objetivo de formar a metacaulinita. Os produtos calcinados foram submetidos à síntese hidrotermal por 1 e 4h, no qual foram utilizados Na2CO3 e NaOH. De acordo com os resultados, nos caulins calcinados a 700 e 900°C ocorreu a completa transição de fase da caulinita para a metacaulinita e, para a síntese no qual utilizou o caulim calcinado a 700°C ocorreu a formação da fase zeolítica sodalita básica caracterizada por difração de raios X e espectroscopia vibracional no infravermelho que mostrara picos e bandas intensas e definidas indicando maior cristalinidade do material.

  1. BiPO4 photocatalyst employing synergistic action of Ag/Ag3PO4 nanostructure and graphene nanosheets

    Science.gov (United States)

    Mohaghegh, N.; Rahimi, E.

    2016-06-01

    Graphene-supported BiPO4/Ag/Ag3PO4 photocatalyst has been fabricated by simple hydrothermal and impregnation reaction. In BiPO4/Ag/Ag3PO4 based on Reduced Graphene Oxide (RGO), this network renders numerous pathways for rapid mass transport, strong adsorption and multireflection of incident light; meanwhile, the interface between BiPO4/Ag/Ag3PO4 and RGO increases the active sites and electron transfer rate. BiPO4/Ag/Ag3PO4 based on RGO noticeably exhibited high photocatalytic activity than that of BiPO4/Ag/Ag3PO4 and P25 under visible light irradiation for cationic dye (Rhodamine B), anionic dye (methyl orange) and 4-chlorophenol (4-CP) as a neutral pollutant, which are usually difficult to be degraded over the other catalysts. This enhanced photocatalytic activity of Graphene-supported BiPO4/Ag/Ag3PO4 for all pollutants could be mainly ascribed to the reinforced charge transfer from BiPO4/Ag/Ag3PO4 to RGO, which suppresses the recombination of electron/hole pairs. Besides that, this photocatalyst can be used repetitively with a high photocatalytic activity and no apparent loss of activity occurs. The results reveal that the RGO nanosheets work as a photocatalyst promoter during the photocatalytic reaction, leading to an improved photocatalytic activity.

  2. Subjectivity and Sexuality Production in Women Living With HIV/Aids: a Sociopoetic Production Producción de subjetividad y sexualidad en mujeres viviendo con el VIH/Sida: una producción socio-poética Produção de subjetividade e sexualidade em mulheres vivendo com o HIV/Aids: uma produção sociopoética

    Directory of Open Access Journals (Sweden)

    Arisa Nara Saldanha de Almeida

    2010-04-01

    Full Text Available The study aims to apprehend the subjectivity production possibilities concerning sexuality in a group of women living with HIV/aids, based on the sociopoetic method. The subjects were nine women with HIV/aids attended at the public referral hospital for infectious diseases in Fortaleza-CE. The results appoint that sexuality appears in several dimensions: in the sexual act, in knowing their own body, in professional accomplishment, in feelings of desire and love, besides the feeling of freedom. We concluded that sexuality is present in the individual's totality; it is not limited to the sexual act, but goes much further and is characterized as a dynamic realityEl objetivo de este estudio fue aprender las posibilidades de producción de subjetividad acerca de la sexualidad en un grupo de mujeres viviendo con el HIV/SIDA, a partir del método de la socio-poética. Los sujetos fueron nueve mujeres con HIV/SIDA asistidas en un hospital público de referencia para enfermedades infecciosas de Fortaleza, CE. Los resultados apuntan que la sexualidad aparece en varias dimensiones: en el acto sexual, en el conocer el propio cuerpo, en la realización profesional, en los sentimientos de deseo y amor, además del sentimiento de libertad. Se concluye que la sexualidad se encuentra en la totalidad del individuo, ella no se limita al acto sexual, va mucho más allá y se configura como realidad dinámica.O objetivo deste estudo foi apreender as possibilidades de produção de subjetividade acerca da sexualidade em um grupo de mulheres vivendo com o HIV/AIDS, a partir do método da sociopoética. Os sujeitos foram nove mulheres com HIV/AIDS assistidas no hospital público de referência para doenças infecciosas de Fortaleza, CE. Os resultados apontam que a sexualidade aparece em várias dimensões: no ato sexual, no conhecer o próprio corpo, na realização profissional, nos sentimentos de desejo e amor, além do sentimento de liberdade. Conclui-se que a

  3. 新的大功率PoE标准——PoE+

    Institute of Scientific and Technical Information of China (English)

    Clay Stanford

    2009-01-01

    @@ 以太网供电(PoE)标准由IEEE 802.3af任务组于2003年制定,并已被业界所广泛接受.目前,各家主要的制造商均可提供具PoE端口的网络交换机.IP电话一直是PoE普及的推动力,不过PoE也广泛应用于其他多种应用,如无线接入点(WAP)、保安摄像机、RFID标签阅读器等,以及用来为出口标志,甚至电吉他等不那么主流的应用供电.

  4. Electronic Properties of LiFePO4 and Li doped LiFePO4

    Energy Technology Data Exchange (ETDEWEB)

    Allen, J.L.; Zhuang, G.V.; Ross, P.N.; Guo, J.-H.; Jow, T.R.

    2006-05-31

    LiFePO{sub 4} has several potential advantages in comparison to the transition metal oxide cathode materials used in commercial lithium-ion batteries. However, its low intrinsic electronic conductivity ({approx} 10{sup -9} S/cm) is problematic. We report here a study by soft x-ray absorption/emission spectroscopy of the electronic properties of undoped LiFePO{sub 4} and Li-doped LiFePO{sub 4} in which Li{sup +} ions are substituted for Fe{sup 2+} ions in an attempt to increase the intrinsic electronic conductivity. The conductivities of the Li{sub 1+x}Fe{sub 1-x}PO{sub 4} samples were, however, essentially unchanged from that of the undoped LiFePO{sub 4}. Nonetheless, evidence for changing the electronic properties of LiFePO{sub 4} by doping with excess Li+ was observed by the XAS/XES spectroscopy. New pre-edge features the O-1s XAS spectrum of Li{sub 1.05}Fe{sub 0.95}PO4 is a direct indication that the charge compensation for substitution of Fe{sup 2+} by Li{sup +} resides in the unoccupied O-2p orbitals. A charge transfer (CT) excitation was also observed in the doped material implying that the unoccupied O-2p orbitals created by doping are strongly hybridized with unoccupied Fe-3d orbitals of neighboring sites. However, the strong covalent bonding within the (PO{sub 4}){sup 3-} anions and the large separation of the Fe cations means that the charge created by doping is not delocalized in the manner of electrons or holes in a semiconductor.

  5. A PoE (Power over Ethernet) Switching Power%PoE开关电源

    Institute of Scientific and Technical Information of China (English)

    王智剑; 杨宇航

    2005-01-01

    文中对IEEE802.3af标准做介绍,阐述符合该标准的PoE开关电源的设计方案及其实现.尽管该电源专门设计用于VoIP电话,但其本质上具有一般性,只需简单的调整即可用于其它的PoE应用.

  6. Adsorção de cromo (VI por carvão ativado granular de soluções diluídas utilizando um sistema batelada sob pH controlado Chromium (VI adsorption by GAC from diluted solutions in batch system and controlled ph

    Directory of Open Access Journals (Sweden)

    Renata Santos Souza

    2009-09-01

    Full Text Available Na Amazônia o cromo é empregado principalmente na indústria de couro e de madeira, sendo responsável por vários problemas de saúde porque é tóxico para os seres vivos. A remoção de cromo de efluentes industriais é feita por meio de diversos processos como a adsorção. Este trabalho mostra os resultados da adsorção de Cr(VI por carvão ativado granular comercial (CAG como adsorvente de soluções diluídas empregando um sistema de adsorção batelada com controle de pH. Os grupos funcionais da superfície do CAG foram determinados pelo método de Boehm. Além disso, o efeito do pH na adsorção de Cr(VI, o equilíbrio e a cinética de adsorção foram estudados nas condições experimentais (pH = 6, MA = 6g, tempo de adsorção 90min.. Na superfície do CAG, os grupos carboxílicos foram determinados em maior concentração (MAS=0,43 mmol/gCAG, estes, presentes em concentrações elevadas aumentam a adsorção do metal, principalmente em valores de pH ácidos. A capacidade de adsorção é dependente do pH da solução, devido a sua influência nas propriedades de superfície do CAG e nas diferentes formas iônicas das soluções de Cr(VI. Os dados de equilíbrio da adsorção foram ajustados satisfatoriamente pela isoterma de Langmuir (R²=0,988, tipo favorável. A partir da cinética de adsorção a 5mg/L e 20mg/L, os resultados obtidos foram compatíveis com o valor limite preconizado na legislação nacional (Res. nº 357/05. Portanto, para o sistema experimental utilizando CAG foi eficiente na remoção de Cr(VI a partir de correntes líquidas contendo baixas concentrações do metal.In Amazonia, chromium is mainly used in the leather and wood industries. It is responsible for many health problems, because of its toxicity. These industries remove chromium waste by various processes, such as adsorption. This work shows the results of Cr(VI adsorption by commercial granular activated carbon (GAC as adsorbent from diluted

  7. Physical Oceanography Distributed Active Archive Center (PO.DAAC)

    Data.gov (United States)

    National Aeronautics and Space Administration — PO.DAAC is an element of the Earth Observing System Data Information System (EOSDIS). PO.DAAC's primary responsibility is to provide distribution and archive support...

  8. Genealogias poéticas femininas contemporâneas: Pizarnik, César, Prado

    Directory of Open Access Journals (Sweden)

    Graciela Ravetti

    2011-10-01

    Full Text Available Resumo: O trabalho explora a obra poética de mulheres que fundam experiências estéticas na nossa contemporaneidade, que conduzem à subversão dos modos habituais, referenciais, de perceber a relação com a linguagem. Esse percurso genealógico-fundacional se apóia em Alejandra Pizarnik (Argentina 1936-1972, Ana Cristina César (Brasil, 1952-1983 e Adélia Prado (Brasil.Palavras-chave: Literatura argentina; Alejandra Pizarnik; literatura brasileira; Ana Cristina César; Adélia Prado; literatura comparada; mulher; linguagem.Resumen: El trabajo explora la obra poética de mujeres que fundan experiências estéticas em nuestra contemporaneidad que conducen a la sbversión de los modos habituaes, referenciales, de notar la relación palabra-cosa y nuestra relaion com el lenguage. Esse trayecto genealógico-fundacional se amarra em Alejandra Pizanik (Argentina, 1936-1972, Ana Cristina César (Brasil, 1952-1983 y Adélia Prado (Brasil.Palabras-clave: Literatura argentina; Alejandra Pizarnik; literatura brasileña; Ana Cristina César; Adélia Prado; literatura comparada; mujer; lenguaje.Keywords: Argentinian literature; Alejandra Pizarnik; Brazilian literature; Ana Cristina César; Adélia Prado; comparative literature; women; language.

  9. Multisensorialidade e sinestesia: poéticas possíveis?

    Directory of Open Access Journals (Sweden)

    Rosangella Leote

    Full Text Available Resumo Pretendo apresentar neste trabalho alguns aspectos da percepção quando esta envolve obras no uso de tecnologias emergentes, tanto para o fazer artístico, como na relação de fruição da obra. Para isto, trago conceitos de modos interativos, bem como multissensoriais, sinestésicos e pseudo sinestésicos. Observo uma problemática sobre a acepção da obra de arte, dentro desta situação poética, em especial quando ela compõe elementos lúdicos, assim como outros elementos de caráter de entretenimento. Encontro apoio para compreender esta problemática, que é de natureza transdisciplinar, em fundamentos de ordem multidisciplinar. Tento, neste discurso, apontar respostas objetivas, embora hipotéticas, uma vez que se referem a uma pesquisa em andamento. Para isto, abordo as relações entre estas figuras, sejam elas a obra, o artista e o interator. Elenco possíveis razões sistêmicas, semióticas e neurocientíficas para um tipo de aproximação entre estas partes que, desde já, coloco como imbricadas. Além disto, demonstro como certas poéticas podem encaminhar à Multisensorialidade sem envolver sinestesia.

  10. Emprego do carvão ativado para remoção de cobre em cachaça Using activated carbon to remove copper from sugar cane spirit

    Directory of Open Access Journals (Sweden)

    Annete de J. Boari Lima

    2006-04-01

    Full Text Available Copper content is of great concern among sugarcane-spirit producers. It is released from copper-made distillers, during the distillation process. Activated carbon has been used to remove copper. However, depending on the amount of carbon and the duration of reaction, it can also remove higher alcohols and esters, which are important in the final product. A sugarcane spirit with 9 mg L-1 of copper was shaken with 2 to 26 g L-1 of activated carbon, during 10 to 1440 minutes. Then, copper and organic compounds were measured. At least 12 g L-1 of carbon and 60 min shaking time were necessary to decrease copper bellow 5 mg L-1. However, other components of the product were also affected.

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

    Directory of Open Access Journals (Sweden)

    Hoffmann Lúcia Vieira

    2001-01-01

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

  12. Informatique et poésie

    OpenAIRE

    Vuillemin, Alain

    1995-01-01

    Sommaire du numéro :http://archive-edutice.ccsd.cnrs.fr/edutice-00000865; Un écran s'allume, des caractères jaillissent, des lettres surgissent, des mots scintillent, des phrases s'animent, des vers s'assemblent, des formes s'élaborent, des symboles prennent vie, un sens naît. Une sorte de miracle paraît s'être produit : un texte s'est construit, un souffle a passé, un poème s'est « généré ». Un acte de création poétique a eu lieu grâce à l'aide d'un ordinateur. Deux revues, Alire depuis 1989...

  13. Aspects on the analysis of 210Po

    DEFF Research Database (Denmark)

    Henricsson, F.; Ranebo, Y.; Holm, E.

    2011-01-01

    will be too low. Both these systematic errors give rise to a too high 210Po/210Pb ratio. The fraction of 210Pb which is plating out has been assessed in this study for different matrices and is about 50–90%. During the measurement by solid state Si-detectors, some Po is evaporated in the vacuum conditions......-ashing by the use of a double-tracer technique. We have found that the losses were about 30% when open glass beakers were used and about 17% when the samples were digested in microwave oven. When long-necked bottles (Kjeldahl flasks) were used, a loss of about 20% was registered. It has also been observed that 210...

  14. The BiPo-3 detector.

    Science.gov (United States)

    Loaiza, P; Barabash, A S; Basharina-Freshville, A; Birdsall, E; Blondel, S; Blot, S; Bongrand, M; Boursette, D; Brudanin, V; Busto, J; Caffrey, A J; Calvez, S; Cascella, M; Cerna, C; Chauveau, E; Chopra, A; Capua, S De; Duchesneau, D; Durand, D; Egorov, V; Eurin, G; Evans, J J; Fajt, L; Filosofov, D; Flack, R; Garrido, X; Gómez, H; Guillon, B; Guzowski, P; Holý, K; Hodák, R; Huber, A; Hugon, C; Jeremie, A; Jullian, S; Kauer, M; Klimenko, A; Kochetov, O; Konovalov, S I; Kovalenko, V; Lang, K; Lemière, Y; Noblet, T Le; Liptak, Z; Liu, X R; Lutter, G; Macko, M; Mamedov, F; Marquet, C; Mauger, F; Morgan, B; Mott, J; Nemchenok, I; Nomachi, M; Nova, F; Ohsumi, H; Oliviéro, G; Pahlka, R B; Pater, J; Perrot, F; Piquemal, F; Povinec, P; Přidal, P; Ramachers, Y A; Remoto, A; Richards, B; Riddle, C L; Rukhadze, E; Saakyan, R; Sarazin, X; Shitov, Yu; Simard, L; Šimkovic, F; Smetana, A; Smolek, K; Smolnikov, A; Söldner-Rembold, S; Soulé, B; Štekl, I; Thomas, J; Timkin, V; Torre, S; Tretyak, Vl I; Tretyak, V I; Umatov, V I; Vilela, C; Vorobel, V; Waters, D; Žukauskas, A

    2017-05-01

    The BiPo-3 detector is a low radioactive detector dedicated to measuring ultra-low natural contaminations of (208)Tl and (214)Bi in thin materials, initially developed to measure the radiopurity of the double β decay source foils of the SuperNEMO experiment at the μBq/kg level. The BiPo-3 technique consists in installing the foil of interest between two thin ultra-radiopure scintillators coupled to low radioactive photomultipliers. The design and performances of the detector are presented. In this paper, the final results of the (208)Tl and (214)Bi activity measurements of the first enriched (82)Se foils are reported for the first time, showing the capability of the detector to reach sensitivities in the range of some μBq/kg. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. Matriz poética bíblica: um percurso de leitura de A paixão segundo G. H.

    Directory of Open Access Journals (Sweden)

    Tânia Jordão

    2013-03-01

    Full Text Available Ao construir seu quinto romance, Clarice Lispector parte de uma matriz poética bíblica para estruturar seu texto, numa travessia em sentido inverso ao pretendido pela Escritura Sagrada. Nesse deslocamento, leva o leitor a atravessar um deserto com G. H.

  16. Matriz poética bíblica: um percurso de leitura de A paixão segundo G. H.

    OpenAIRE

    Tânia Jordão

    2013-01-01

    Ao construir seu quinto romance, Clarice Lispector parte de uma matriz poética bíblica para estruturar seu texto, numa travessia em sentido inverso ao pretendido pela Escritura Sagrada. Nesse deslocamento, leva o leitor a atravessar um deserto com G. H.

  17. Matriz poética bíblica: um percurso de leitura de A paixão segundo G. H.

    OpenAIRE

    2013-01-01

    Ao construir seu quinto romance, Clarice Lispector parte de uma matriz poética bíblica para estruturar seu texto, numa travessia em sentido inverso ao pretendido pela Escritura Sagrada. Nesse deslocamento, leva o leitor a atravessar um deserto com G. H.

  18. Um batear poético na prosa de Clarice Lispector

    OpenAIRE

    Ribeiro Lima, Lenilde

    2008-01-01

    Este trabalho busca analisar a presença da poesia na prosa de Clarice Lispector, mais precisamente nas obras voltadas para o público adulto, assinalando o modo sedutor como a autora alcança o seu leitor. Procura, também, detectar alguns tópicos da modernidade na prosa poética em relação a manifestações herdadas de outras correntes, como o Simbolismo francês na Literatura Brasileira dos primórdios do século XX. Por fim, apresenta setenta e dois textos da prosa que, por seu al...

  19. Luis Buñuel: uma poética do selvagem

    OpenAIRE

    Eduardo Peñuela Cañizal

    2009-01-01

    This article is an analysis of the effect of rhetorical disruptions at the levels of soundtrack and images inserts in Luis Buñuel’s films. Its main objective consists in detaching fragments of films with the finality of studying the role of a wild poetics Este artículo é uma análise do efeito das rupturas retóricas no nível da trilha sonora e do enxerto de imagens em filmes de Luis Buñuel. Seu principal objetivo é estudar o papel que esses recursos têm numa poética do selvagem.

  20. Um batear poético na prosa de Clarice Lispector

    OpenAIRE

    Ribeiro Lima, Lenilde

    2008-01-01

    Este trabalho busca analisar a presença da poesia na prosa de Clarice Lispector, mais precisamente nas obras voltadas para o público adulto, assinalando o modo sedutor como a autora alcança o seu leitor. Procura, também, detectar alguns tópicos da modernidade na prosa poética em relação a manifestações herdadas de outras correntes, como o Simbolismo francês na Literatura Brasileira dos primórdios do século XX. Por fim, apresenta setenta e dois textos da prosa que, por seu al...

  1. Razmjena poštanskih pošiljaka Jugoslavije sa svijetom u 1979-1988.

    Directory of Open Access Journals (Sweden)

    Slavko Jaram

    2012-10-01

    Full Text Available U ovom radu je analizirana i ocijenjena međunarodna razmjena poštanskih pošiljaka Jugoslavijesa svijetom u razdoblju 1979-1988.Zaključuje se o snazi, smjeru i značajkama nastalih promjena u dinamici i strukturi, posebnoza svaku skupinu usluga (pismovne i paketske. Pismovne i paketske usluge pokazuju stalno smanjenje u oba smjera (izvoz i uvoz začitavo razdoblje. Analitičke slike geografskedistribucije usluga pokazuju dominantnu uloguzemalja Evrope, posebno SR Njemačke.Zaključuje se da je ovakav pad međunarodnoga poštanskog prometa, uzrokovan izrazitom razvojnom tendencijom supstitucija među pojedinim vrstama usluga u uvjetima širenja. suvremene telekomunikacijske mr:eže, iako se ne bi smjeli zanemariti ni drugi uzroci, posebno u paketskih pošiljaka, koji su proizlazili iz opće ekonomske situacije zemlje u osamdesetim godinama ovog stoljeća.U budućnosti valja očekivati dugoročniju stagnaciju međunarodne razmjene poštanskih usluga, a u nekih usluga i nastavak opadanja.

  2. Dinâmica da estrutura diamétrica da regeneração natural de espécies arbóreas e arbustivas no sub-bosque de povoamento puro de Mimosa scabrella Bentham, em área minerada, em Poços de Caldas, MG Diametric struture dynamics for tree and shrub natural regeneration understory within pure stands of Mimosa scabrella Bentham planted on a mined-out site at Poços de Caldas, Minas Gerais state

    Directory of Open Access Journals (Sweden)

    Mauro Eloi Nappo

    2005-02-01

    Full Text Available A área do Retiro-Branco, de propriedade da Companhia Geral de Minas, subsidiária da ALCOA Alumínio S.A., foi minerada para a extração de bauxita de 1978 até 1981. Em 1982/1983, essa área teve seu processo de reabilitação implementado mediante a hidrossemeadura de gramíneas e leguminosas e o plantio puro de Mimosa scabrella Bentham. Em 1997 foi realizado o primeiro inventário da regeneração natural do Retiro-Branco, aravés da implantação de 19 parcelas permanentes para caracterização inicial do processo de sucessão natural. E em 2000 foi realizado o segundo inventário dessas parcelas para caracterizar o processo de dinâmica da regeneração, o objeto deste trabalho. O processo de dinâmica da regeneração natural foi caracterizado mediante análises quantitativas e qualitativas da distribuição diamétrica. Os estudos indicaram que o monitoramento mediante inventário florestal contínuo, com parcelas permanentes setorizadas, é uma ferramenta viável para avaliações da dinâmica da regeneração natural, rumo à compreensão dos caminhos da sucessão. Foi caracterizado o processo de estratificação da regeneração natural, em que as espécies pioneiras e clímax foram as principais componentes do estrato inferior e as secundárias, as principais componentes do estrato superior. O povoamento florestal do Retiro-Branco está sobre intensa atividade de estruturação, caracterizando o estágio inicial do processo de sucessão. As espécies secundárias são as de maior dominância nas maiores classes de altura e de diâmetro, sendo as principais responsáveis pela edificação do estrato superior. A prognose da distribuição diamétrica, realizada mediante o emprego da Cadeia de Markov, foi uma ferramenta de fácil implementação e que permitiu prever o caminho do processo de sucessão para o povoamento todo e para os grupos ecológicos de espécies, ampliando o entendimento dos mecanismos que regem o comportamento

  3. Forenzika elektronske pošte

    Directory of Open Access Journals (Sweden)

    Milorad S. Markagić

    2013-10-01

    Full Text Available U najopštijem smislu digitalna forenzika može se definisati kao skup metoda za prikupljanje, analizu i prezentaciju digitalnih dokaza koji se mogu pronaći na računarima, serverima, u računarskim mrežama, bazama podataka, mobilnim uređajima i svim drugim elektronskim uređajima na kojima se čuvaju podaci. U ovom radu su opisane metode prikupljanja digitalnih dokaza u elektronskoj pošti i njihova analiza. Uvod Elektronska pošta se kao dokazni materijal pojavljuje u velikom broju kako građanskih tako i kriminalnih forenzičkih istraga. Elektronska pošta i elektronska pošta zasnovana na internet serverima  širi se veoma brzo, pa lako i brzo završi i na računaru korisnika kome nije namenjena. Prvu elektronsku poruku poslao je Ray Tomilson 1971. godine, a deset godina kasnije u kombinaciji sa personalnim računarima i internetom prerasta u globalni način komuniciranja i personalnog i poslovnog. Takođe se koristi i u svrhu zabave, načina razmene podataka, ali predstavlja i nezamenjiv izvor digitalnih dokaza, kada dodje do računarskog incidenta. Analiza elektronske pošte Svaka elektronska poruka sastoji se od dva dela: zaglavlja i teksta poruke. Iz zaglavlja je moguće saznati izvorišnu i odredišnu adresu, pošiljaoca i namenjenog primaoca, a telo poruke sadrži tekst poruke. Ekstenzije dokumenata elektronske pošte U slučajevima kada je potrebno otkriti samo dokumente potrebne za pregled elektronskih poruka, ili kopirati pojedinačni dokument sačuvan unutar elektronske pošte, moguće je koristiti sistem na istraživanom računaru ili specijalizovani softver kao što je Outlook Extract Pro ili Outlook Export. Mnogo ispravniji, sigurniji i jednostavniji način je korišćenje forenzičkih alata kao što su EnCase ili FTK, sa ugrađenim pregledačima koji omogućavaju pregled i snimanje sadržaja baze podataka kao i njihovo kopiranje na druge medije za dalju analizu. Forenzički alati automatizuju proces skidanja i kopiranja

  4. Production and decay spectroscopy of {sup 192}Po and {sup 194}Po

    Energy Technology Data Exchange (ETDEWEB)

    Andel, B., E-mail: boris.andel@fmph.uniba.sk [Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 842 48 Bratislava (Slovakia)

    2015-10-15

    A γ-ray spectroscopy study of the (11{sup −}) isomers in {sup 194}Po and {sup 192}Po was performed at the velocity filter SHIP at GSI (Germany). Nuclei were produced in fusion-evaporation reactions and investigated in the detection set-up at the focal plane after the separator. Several new γ transitions were attributed to the isomers and detailed analysis of the first γ-γ coincidences for both isomers is being prepared. For the reaction {sup 56}Fe + {sup 141}Pr → {sup 197}At*, excitation functions for astatine and polonium isotopes were measured and compared with HIVAP calculations.

  5. A melancolia em Al Berto

    OpenAIRE

    Camila Emanuele Martins de Souza

    2015-01-01

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

  6. L’Art du Poète

    OpenAIRE

    Durand, Frédéric

    2013-01-01

    La poésie, c’est l’épanchement du songe dans la vie réelle. Gérard de Nerval Car Jacobsen fut un poète. Un poète dont les vers restent inégaux, laborieux et courts de souffle, mais dont bien des pages en prose méritent et appellent le culte de la prospérité. Un authentique poète, au sens où l’entendait l’auteur de Aurélia ou le Rêve de la vie, comme plus tard celui des Poèmes en prose. Toute son œuvre peut légitimement revendiquer le prestigieux bénéfice de la poésie, perpétuellement tendue q...

  7. PoP的发展与技术探讨

    Institute of Scientific and Technical Information of China (English)

    陆祥华

    2012-01-01

    叠层封装即PoP,主要用在信号处理和系统存储器系列中,特别在智能手机及多媒体平板电脑中的应用较广。从2005年第一代PoP产品到现在,PoP的应用呈逐年增长的势头。

  8. A new polymorph of Lu(PO33

    Directory of Open Access Journals (Sweden)

    Anis Bejaoui

    2008-08-01

    Full Text Available A new polymorph of lutetium polyphosphate, Lu(PO33, was found to be isotypic with the trigonal form of Yb(PO33. Two of the three Lu atoms occupy special positions (Wyckoff positions 3a and 3b, site symmetry overline{3}. The atomic arrangement consists of infinite helical polyphosphate chains running along the c axis, with a repeat period of 12 PO4 tetrahedra, joined with LuO6 octahedra.

  9. Analýza postury polohovým snímačem DTP2 u žen ve věku senescence po aplikaci cíleného cvičebního programu Posture analysis using position detector DTP2 in senescent women after the application of a targeted exercise program

    Directory of Open Access Journals (Sweden)

    Miroslava Přidalová

    2008-01-01

    Full Text Available U 3 souborů žen v mladším seniorském věku (průměrný věk 61, 63 a 66 let jsme v roce 2005, 2006 a 2007 sledovali změny v držení těla a ve tvaru páteře pomocí diagnostického přístroje DTP2 po intervenčním zásahu cíleného cvičebního programu (čínské terapeutické cvičení Chuej čchun kung. Cvičení ovlivnilo především oblast pánve, trendy naznačující zlepšení držení těla a stability nedosáhly ve všech případech statistické významnosti. Vzhledem k tomu, že technika cvičení je cíleně náročná, nesprávně provedené pozice nevedly ke zlepšení, ale projevily se nulovým efektem.Vždy byly nalezeny pozitivní změny ve smyslu zlepšení stability stoje a signifikantního posunu hrudní kyfózy k vertikále, což svědčí o zlepšení držení těla. V postavení ramen se projevila určitá rozkolísanost ve smyslu změn asymetrie ramen. Také postavení pánve reagovalo na intervenční zásahy přesuny asymetrie spinálních úhlů po 1. a 2. etapě cvičení, po 3. etapě došlo ke statisticky významnému vyrovnání levostranné asymetrie. Nalezli jsme zmenšení rozsahu titubací axiálního skeletu, což je doprovodným projevem zvýšení stability stoje. Celkově se nejlepší výsledky projevily po intervenci v roce 2007, kdy se snížil rozsah titubací ve směru osy x i y, byla zjištěna statisticky významná pozitivní změna v úpravě symetrie spina iliaca posterior superior a nalezen věcně významný trend snížení úhlových hodnot lordóz i hrudní kyfózy.Zdůvodnění těchto změn je možné najít ve zvýšeném důrazu na správné provádění technik cvičení a tím i úprav svalových dysbalancí. Subjektivní pocity seniorek byly velmi příznivé, vysoce pozitivně hodnotily pocit zlepšení stability stoje. During the years 2005, 2006, and 2007, we studied changes in the posture and spinal shape in three groups of younger female seniors (mean age 61, 63, and

  10. A Poética de Manoel de Barros: uma sabedoria da terra

    Directory of Open Access Journals (Sweden)

    Ligia Savio

    2004-01-01

    Full Text Available Este artículo se refiere a la obra poética poética del brasileiro Manoel de Barros (1916. Su objetivo es presentar algunas características de su poesía en referencia a los libros Gramática Expositiva do Cháo e Concerto a céu aberto para solos de ave. El análisis está refrendado con entrevistas al autor consideradas como epitextos de carácter metafórico complementarios a su obra.El ejercicio poético de Barros es inseparable a su palabra fuertemente arraigada en la vidaNeste trabalho, analisam-se dois livros do poeta brasileiro Manoel de Barros imagens de extrema sensorialidade, volta-se para a terra e para a natureza, espaço onde o homem redescobre o sentido de tudo e encontra um novo lugar para si mesmo. Manoel de Barros incorpora a seu fazer poético recursos contemporâneos e , em golpes de pura intertextualidade, traz para seus poemas a presença tanto de criadores da tradição artística européia quanto de autores renomados da Língua PortuguesaThis article deals with the poetic work of the brazilian author Manoel de Barros (1916. His aim is to present some characteristics of his poesóa in reference to the books Grammatical Expositiva do Cháo and Concerto a céu aberto para solos de ave. The analysis is authenticated with interviews to the author considered as epithets of metaphorical character supplementary to his work. Barros’ poetic exercise is inseparable to his declaration strongly rooted in life

  11. Degradation Studies on LiFePO4 cathode

    DEFF Research Database (Denmark)

    Scipioni, Roberto; Jørgensen, Peter Stanley; Hjelm, Johan

    2015-01-01

    In this paper we examine a laboratory LiFePO4 (LFP) cathode and propose a simple model that predicts the electrode capacity as function of C-rate, number of cycles and calendar time. Microcracks were found in Li1-xFePO4 particles in a degraded LFP electrode and low-acceleration voltage (1 kV) FIB....../SEM analysis allowed us to obtain phase contrast between FePO4 and LiFePO4. The evolution of micro-cracks is expected to increase the concentration of LFP particles which are not electronically accessible and thus cause a loss in capacity....

  12. Sodium samarium tetrakis(polyphosphate, NaSm(PO34

    Directory of Open Access Journals (Sweden)

    Dan Zhao

    2010-07-01

    Full Text Available NaSm(PO34 has been prepared by solid state reactions. It belongs to type II of the structural family of MILnIII(PO34 compounds (MI = alkali metal and LnIII = rare earth metal and is composed of ∞(PO3n]n− polyphosphate chains with a repeating unit of four PO4 tetrahedra. The chains extend parallel to [100] and share O atoms with irregular SmO8 polyhedra, forming a three-dimensional framework which delimits tunnels occupied by Na+ cations in a distorted octahedral environment.

  13. Effect of Ag+ and PO43- ratios on the microstructure and photocatalytic activity of Ag3PO4

    Science.gov (United States)

    Qin, Jiaqian; Zhang, Xinyu; Yang, Chengwu; Song, Aijun; Zhang, Bing; Rajendran, Saravanan; Ma, Mingzhen; Liu, Riping

    2016-09-01

    In this work, the catalyst silver phosphate (Ag3PO4) with different initial ratios of Ag+ and PO43- in aqueous solution was synthesized by a simple precipitation method from AgNO3 and NH4H2PO4 which were used as the precursor. After that, the prepared samples were characterized by different techniques such as field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (UV-DRS) and decomposition evolution of rhodamine B (RhB) solution. The results indicate that the initial ratios of Ag+/PO43- in aqueous solution can modify the morphology and also it can significantly affect the photocatalytic performance. During photocatalytic process, the rich Ag+ ion Ag3PO4 can form the surface plasmon resonance (SPR) of Ag nanoparticles, which inhibit the reduction of Ag3PO4 resulting in higher photocatalytic activity and stability.

  14. "Edgar Allan Poe e Charles Baudelaire: trajetórias e maturidade estética e poética"

    OpenAIRE

    Renata Philippov

    2005-01-01

    Esta tese de doutorado, intitulada “Edgar Allan Poe e Charles Baudelaire:trajetórias e maturidade estética e poética”, teve por objetivo analisar e interpretar, dentro de uma perspectiva comparativa, o percurso feito por Poe e Baudelaire desde suas obras iniciais, até atingirem uma maturidade estética e poética. Tomando por base a visão de Antoine Compagnon em seu Le Démon de la Théorie (1998) obra que retoma algumas teorias críticas, como a do círculo hermenêutico proposto por Schleiermacher...

  15. On Left π-regular po-semigroups%关于左π-正则po-半群

    Institute of Scientific and Technical Information of China (English)

    许新斋

    2001-01-01

    本文在po-半群和半群中引进了一致π-半素族的概念,并给出了左π-正则po-半群的若干刻划.这些刻划推广了N.Kehayopulu在文[1]中给出的一些结果.%In this paper, the concept of uniform π-semiprime family in po-semigroups and semigroups is introduced. We give characterizations of left π-regular po-semigroups which generalize the results given by N. Kehayopulu in [1].

  16. PoE交换机设计与配置管理%Design and Configuration of PoE Switch

    Institute of Scientific and Technical Information of China (English)

    刘嘉滨

    2012-01-01

    在WLAN业务和安防网络视频监控业务中需部署大量无线AP和IP Camera设备,为解决部署在特殊位置上设备取电问题,可通过PoE技术进行远程供电.结合成熟的网络交换机技术,PoE交换机随之出现.通过介绍PoE交换机设计与配置,进一步加深对PoE技术的认识.这种设计和配置的PoE交换机已在市场上成功应用.%Lots of wireless AP and IP camera devices have to be deployed in WLAN and monitors. In order to provide power supply for devices in special positions, the Power over Ethernet technology can be utilized. In combination with the ripe switch technology, PoE switches appear. By introducing the design and configuration of the PoE switch, the PoE technology can be further understood. And this type of PoE switch has appeared in the market.

  17. Studies of {sup 194,195,197}Po

    Energy Technology Data Exchange (ETDEWEB)

    Carpenter, M.P.; Ahmad, I.; Crowell, B. [and others

    1995-08-01

    The energy systematics of low-lying polonium states show sudden changes near N = 114. The observed drops in the low-lying levels of {sup 196,198}Po relative to the heavier isotopes indicate significant changes in the underlying structure of these nuclei. It is thought that this change is due to the onset of vibrational collectivity brought about by the quadrupole interaction between neutron and proton-pairs. In order to extend the Po systematics even further, we measured, for the first time, states in {sup 194,195,197}Po using the {sup 28}Si + {sup 170}Yb reaction at a beam energy of 142 MeV. The beam was supplied by ATLAS, and the data were taken with 10 Compton-suppressed Ge detectors placed at the target position of the Fragment Mass Analyzer. Preliminary level schemes were constructed for {sup 194,195,197}Po based on {gamma}-{gamma} and {gamma}-FMA coincidences. The results for {sup 194}Po show that the 2{sup +} - 0{sup +} transition energy decreased in energy by 140 keV relative to {sup 196}Po suggesting that this nucleus moved beyond the vibrational limit to more collective motion. An extrapolation of the systematics predicts that the 2{sup +} energy could drop another 140 keV between {sup 194}Po and {sup 192}Po which would indicate the onset of rotational motion. Currently, we have an approved experiment to investigate the decay of yrast isomers in {sup 194}Po which will allow us to (1) confirm our earlier level scheme of {sup 194}Po, and (2) assess the experimental conditions needed for a future study of {sup 192}Po.

  18. O Engenheiro Álvaro de Campos e sua construção poética

    Directory of Open Access Journals (Sweden)

    Anderson Xavier

    2011-08-01

    Full Text Available Neste ensaio buscamos o cotejo de “Ode Marítima” com o todo da obra de Álvaro de Campos. Temos como objetivo principal demonstrar um movimento parabólico na produção poética do autor no que tange às sensações. Em um primeiro momento o poeta impressionado pela modernidade do mundo exalta a velocidade e a máquina. Na “Ode Triunfal”, este apego à maquinaria é evidente, assim como em todas as composições de sua fase sensacionista. O envolvimento do poeta com a máquina se dá por uma ligação de amabilidade, explicada pelas idéias que subsistiam em torno do moderno.

  19. REVIEW: TALES OF KHA BA DKAR PO

    Directory of Open Access Journals (Sweden)

    Jundan (Jasmine Zhang

    2015-03-01

    Full Text Available Review of: Jing Guo . 2012. Xue shan zhi shu [Tales of Kha ba dkar po] [ཁ་བ་དཀར་པོ]. Kunming: Yunnan People's Press. My favorite color is to add a little white on the whiteness, as if there was a snow-white eagle landing on a snow-covered mountain rock. My favorite color is to add a bit green on the greenness, as if there was an emerald parrot flying in the wild walnut woods. Deqin xianzi lyrics. These lyrics evoke a space beyond a sense of realism. In his book, Tales of Kha ba dkar po (ToK, Guo mentions these lines three times, suggesting a transcendental experience one may encounter in Tibetan areas while, at the same time, humbled by the mindset of human nature relations enacted by Tibetan people. ToK is, in many ways, a valuable academic work. Guo's favorite lines of xianzi allude to a 'space-in-between' the secular and sacred, which provides a unique experience for a broad readership, and induces the readers to deeper reflections on topics such as 'nature/ culture', 'belief', 'rite', and 'life/ death'. ToK is one of nineteen contemporary anthropological and ethnological works conducted in Yunnan Province, Southwest China and published in the 'Anthropology and Ethnology series in Contemporary China'. In the preface for the series, Yin (2012 suggests that there are two primary reasons for the somewhat slow development of Chinese scholarship in the field of anthropology and ethnology. One is the historically Han-centered intellectual atmosphere, and the other is the ideological ambivalence that ethnic culture has faced since the establishment of the People's Republic of China. In this context, Guo's longitudinal academic and intellectual engagement with the Tibetan communities in northwest Yunnan is included in this series as part of the increasing recognition of the significance of understanding southwest China's complex ethnic and cultural diversity.

  20. Separation and electrodeposited of {sup 210} Po; Separacion y electrodeposito de {sup 210} Po

    Energy Technology Data Exchange (ETDEWEB)

    Ordonez R, E.; Iturbe G, J.L

    1991-12-15

    Presently work it was determined the selective separation of the {sup 210} Po that is in an uraniferous mineral, by means of acid leaching of the mineral and the purification was carried out by means of partition chromatography whose stationary phase is 2-ethylhexyl phosphoric acid (D{sub 2}EHPA), it has been possible to isolate the {sup 210} Po of the rest of the radioactive elements that conform the family 4 N{sup +2}, the optimal elutriation conditions of this element were settled down of manner of not dragging other radioelements. Another of the achievements presented in this communication has been the electrodeposition of this element has more than enough stainless steel discs with a superior yield to 95%. (Author)

  1. Effect of Phosphate Salts (Na3PO4, Na2HPO4, and NaH2PO4) on Ag3PO4 Morphology for Photocatalytic Dye Degradation under Visible Light and Toxicity of the Degraded Dye Products

    NARCIS (Netherlands)

    Amornpitoksuk, P; Intarasuwan, K; Suwanboon, S; Baltrusaitis, J.

    2013-01-01

    Ag3PO4 was synthesized by the precipitation method using three different types of phosphate salts (Na3PO4, Na2HPO4, and NaH2PO4) as a precipitating agent. Hydrolysis of each phosphate salt gave a specific pH that affected the purity and morphology of the prepared Ag3PO4. The Ag3PO4 prepared from Na2

  2. Preparation of Partial Spherical LiFePO4 Using Spherical Li3PO4 as Aprecursor%以球形Li3PO4制备球形LiFePO4

    Institute of Scientific and Technical Information of China (English)

    于春洋; 潘志红

    2007-01-01

    以曲拉通100作表面活性剂,用超声波法制备了球形度较好、平均粒径为10μm的球形Li3PO4.以球形Li3PO4为前驱体制备了部分球形的LiFePO4,并对其电化学性能进行了研究.由该法制备的LiFePO4振实密度为1.20 g/cm3,较其他方法制备的LiFePO4密度有所提高.

  3. Anisotropic lithium ion migration in LiFePO4

    Science.gov (United States)

    Park, S. B.; Park, C. K.; Hwang, J. T.; Cho, W. I.; Jang, H.

    2011-12-01

    An anisotropic behavior of lithium ion migration in LiFePO4 is investigated using the cathode particles after chemical delithiation. A phase contrast of a LiFePO4 particle validating the directional property is also found. It suggests that the lithium ion migration path is limited to the [010] direction and the phase boundary between LiFePO4 and FePO4 is perpendicular [010]. The symmetric phase boundary inside the LiFePO4 particle is contrary to the non-directional core-shell model reported by others. The molecular dynamics simulation confirms the crystallographic direction with the lowest energy for lithium ion migration.

  4. Al Berto e F. Antonino Bacelar: o erotismo em devaneio

    OpenAIRE

    Kenedi Santos Azevedo

    2013-01-01

    Em um trabalho de teor comparatista, pretende-se fazer a leitura das obras do poeta português Al Berto, O Medo, de 2009, e do amazonense F. Antonino Bacelar, Na flor do maracujá: contos e poemas, de 2010, averiguando a forma que ambos expressam o erotismo em seus poemas. Al Berto, por exemplo, se utiliza das manifestações homoafetivas, em meio ao devaneio, ao delírio, e ao real, instituindo, assim, uma nova dicção no fazer poético contemporâneo de Portugal. Enquanto F. Antonino Bacelar ilustr...

  5. Colostomia continente com esfíncter artificial de silicone: estudo em cães

    Directory of Open Access Journals (Sweden)

    Gomes Edmundo Guilherme de Almeida

    2003-01-01

    Full Text Available OBJETIVO: A presente investigação teve como objetivo implantar um esfíncter artificial de silicone ( C C - Silimed® em colostomias terminais, em cães, e analisar a continência às fezes sólidas e líquidas, como também as complicações advindas do procedimento. MÉTODOS: Foram utilizados 13 cães mestiços, 11 machos e 2 fêmeas, com peso que variou entre 16 e 30kg, média de 22,5 + 4,3kg. Foram construídas colostomias terminais dotadas do C C - Silimed®, que eram ativados por um período de 8 horas diariamente. Os animais eram observados durante 15 semanas. A continência alcançada era demonstrada radiologicamente através de enema baritado. RESULTADOS: A pressão no sistema variou entre 60 e 80cm de água, média de 74,8 + 5,0cm. O volume de fluido que era introduzido no reservatório oscilou entre 5 e 8ml, média de 6,9 + 0,8ml. A continência foi alcançada em todos os animais, mas ocorreu escape fecal esporádico nos cães, durante esforços físicos. Infecção da ferida operatória aconteceu em três cães ( 23,1% e obstrução intestinal em ( 7,7% . CONCLUSÃO: O esfíncter artificial de silicone ( C C - Silimed® mostrou-se efetivo na continência para fezes sólidas e líquidas. Assim sendo, abre uma expectativa para seu emprego clínico, em tempo futuro, em indivíduos portadores de colostomia definitiva.

  6. “Dançar o nome com o braço na palavra berço”: A relação vida e obra poética de Edimilson de Almeida Pereira

    Directory of Open Access Journals (Sweden)

    Maria José Somerlate Barbosa

    2011-12-01

    Full Text Available O artigo tem o objetivo de refletir sobre a relação vida e obra poética de Edimilson de Almeida Pereira, poeta nascido em Juiz de Fora, MG, em 1963. O autor costuma enfatizar a existência de traços biográficos na sua produção poética, analisando este aspecto em entrevistas e depoimentos concedidos a vários estudiosos da sua obra. Nesses textos, menciona, por exemplo, o papel que a experiência de crescer em ambiente financeiramente carente desempenhou na economia vocabular da sua poesia e na maneira de ver o mundo.Palavras-chave: Poesia Brasileira; Afro-Brasileiros; Edimilson de Almeida Pereira

  7. Synthesis and photoluminescence properties of LiSrPO4:Eu2+ phosphor for solid state lighting

    Science.gov (United States)

    Game, D. N.; Taide, S. T.; Khan, Z. S.; Ingale, N. B.; Omanwar, S. K.

    2016-05-01

    A novel method to prepare orthophosphate LiSrPO4: Eu2+ phosphor for white light-emitting diodes (w-LEDs) is given in this paper. Phosphor was successfully synthesized by Pechini (citrate gel) method which is efficient than conventional high temperature solid state reaction. X-ray powder diffraction (XRD) analysis confirmed the single phase formation of LiSrPO4:Eu2+ with monoclinic crystal structure. Luminescence results showed that the phosphor could be efficiently excited by near UV and exhibited bright blue emission at λem = 420 nm corresponding to 5d- 4f transition of Eu2+. The phosphor exhibits blue emission bands under 350 nm excitation. This mercury-free excitation is useful for solid state lighting and light-emitting diode (LED). Hence it could be useful for solid state lighting and light-emitting diode (LED) application.

  8. Cinema e feminismos entre poética e devir: por uma tecnologia engendrada

    Directory of Open Access Journals (Sweden)

    Fernanda Capibaribe Leite

    2015-12-01

    Full Text Available Esse artigo visa contribuir para a construção de uma poética feminista no cinema e audiovisual contemporâneo concebida na ideia de trânsito ou fluxos para sujeitos de gênero compreendidas/os fora da lógica dos binarismos “cis” e heteronormativos. Para tanto, atualiza a acepção em Lauretis (1987 de que o cinema se constitui como tecnologia de gênero, e aborda tal premissa no contexto das imagens tecnológicas e digitais através do conceito de percepto de devir feminista. Tal relação proposta engloba a ideia de que a poética feminista atualmente se alicerça cada vez mais na prerrogativa das experiências próprias de personagens subjetificadas/os, por um caminho patêmico no qual mulheres cis e trans não mais são colocadas sob o olhar do outro-homem-dominador, mas, ao contrário, se enunciam sob referências de seus próprios cotidianos e espaços de interlocução. Nesse sentido, a atualização da ideia de tecnologia de gênero para o cinema está ligada ao fato de que tais imagens configuram desterritorializações, devires, tanto no que toca a relação hegemonia-subalternidade no sistema sexo-gênero como no que se refere à própria ideia dos sujeitos legítimos e nomeados no feminismo. Como escopo investigativo, lanço um olhar sobre a produção Dude looks Like a Lady, parte da série de curtas em pornografia feminista intitulada XConfessions (LUST, 2013, 125min, oriundos de relatos em texto sobre fantasias e/ou experiências enviadas pela internet. Apesar de tratar de tal realização em particular, a trago também como espaço de acionamento de outras produções na perspectiva do feminismo, que endossam ou potencializam o lugar da diferença em produções com foco nos sujeitos engendrados.

  9. Mechanical and thermal-expansion characteristics of Ca10(PO46(OH2-Ca3(PO42 composites

    Directory of Open Access Journals (Sweden)

    Ruseska G.

    2006-01-01

    Full Text Available Three types of composites consisting of Ca10(PO46(OH2 and Ca3(PO42 with composition: 75% (wt Ca10(PO46(OH2: 25%(wt Ca3(PO42; 50%(wt Ca10(PO46(OH2: 50%(wtCa3(PO42 and 25 %(wt Ca10(PO46(OH2: 75%(wt Ca3(PO42 were the subject of our investigation. Sintered compacts were in thermal equilibrium, which was proved by the absence of hysteresis effect of the dependence ΔL/L=f(T during heating /cooling in the temperature interval 20-1000-200C. Sintered compacts with the previously mentioned composition possess 26-50% higher values of the E-modulus, G-modulus and K-modulus indicating the presence of a synergism effect. Several proposed model equations for predicting the thermal expansion coefficient in dependence of the thermal and elastic properties of the constitutive phases and their volume fractions, given by: Turner, Kerner, Tummala and Friedberg, Thomas and Taya, were used for making correlations between mechanical and thermal-expansion characteristics of the Ca10(PO46(OH2 - Ca3(PO42 composites. Application of the previously mentioned model equations to all kinds of composites leads to the conclusion that the experimentally obtained results for the thermal expansion coefficient are in an excellent agreement with the theoretical calculated values on account of the volume fraction of each constitutive phase and with all applied model equations, with a coefficient of correlation from 98.16-99.86 %.

  10. Políticas e Poéticas do Acontecimento: do silêncio a um risco de voz

    Directory of Open Access Journals (Sweden)

    Alda Regina Tognini Romaguera

    2016-01-01

    Full Text Available Interessanos pensar poéticas e políticas das imagens e palavras em uma escrita atravessada por experiências (oficinas, saraus, exposições... que aconteceram no projeto de extensão Oficinas de leitura e criação com palavras e imagens, desenvolvido pelo Núcleo de Leitura Fabulografias - ALB, ao longo dos anos de 2013 e 2014. Como extrair das palavras e das fotografias sua significação fazendo-as vibrar, tornando-as múltiplas? Lançar-se ao acontecimento em encontros, pensamentos e composições poéticas e fotográficas, um dos desafios de um espaço de experimentação coletiva em torno dos ventos que percorrem encontros do Coletivo Fabulografias. Entre outros: romper as ordens discursivas e fazer ecoar vida desde dentro de um tenso silêncio que paira. Com/por uma educação que quer diferir in-ventando pelas potências da arte e da filosofia de Gilles Deleuze.

  11. Redetermination of β-Ba(PO32

    Directory of Open Access Journals (Sweden)

    Matthias Weil

    2014-02-01

    Full Text Available In comparison with the previous structure determination of the β-modification of barium catena-polyphosphate that was based on Weissenberg film data [Grenier et al. (1967. Bull. Soc. Fr. Minéral. Cristallogr. 90, 24–31], the current CCD-data-based redetermination reveals all atoms with anisotropic displacement parameters, standard uncertainties for the atomic coordinates, and the determination of the absolute structure. Moreover, a much higher accuracy in terms of the bond-length distribution for the polyphosphate chain, with two shorter and two longer P—O distances, was achieved. The structure consists of polyphosphate chains extending parallel to [100] with a periodicity of two PO4 tetrahedra. The Ba2+ cations are located between the chains and are surrounded by ten O atoms in the form of a distorted coordination polyhedron, with Ba—O distances ranging from 2.765 (3 to 3.143 (3 Å, also reflecting the higher precision of the current redetermination.

  12. LiFePO_4/C via fluoride doping

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Non-stoichiometric compound fluoride-doped LiFePO4/C cathode materials were synthesized via solid-state reaction using MgF2 and AlF3 as dopant. The fluoride-doped LiFePO4/C samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical testing. The results show that the materials are well crystallized and fluoride doping cannot change the space structure of LiFePO4. Slight amounts of Fe2O3 with no fluoride impurity were ...

  13. Biogeochemical factors affecting the presence of 210Po in groundwater

    Science.gov (United States)

    Seiler, R.L.; Stillings, L.L.; Cutler, N.; Salonen, L.; Outola, I.

    2011-01-01

    The discovery of natural 210Po enrichment at levels exceeding 500 mBq/L in numerous domestic wells in northern Nevada, USA, led to a geochemical investigation of the processes responsible for its mobilization. 210Po activities in 63 domestic and public-supply wells ranged from below 1 mBq/L to 6590 ± 590 mBq/L, among the highest reported levels in the USA. There is little spatial or depth variability in 210Pb activity in study-area sediments and mobilization of a few percent of the 210Po in the sediments would account for all of the 210Po in water. Stable-isotope measurements indicate SO4 reduction has occurred in all 210Po contaminated wells. Sulfide species are not accumulating in the groundwater in much of Lahontan Valley, probably because of S cycling involving microbial SO4 reduction, abiotic oxidation of H2S to S0 by Mn(IV), followed by microbial disproportionation of S0 to H2S and SO4. The high pH, Ca depletion, MnCO3 saturation, and presence of S0 in Lahontan Valley groundwater may be consequences of the anaerobic S cycling. Consistent with data from naturally-enriched wells in Florida, 210Po activities begin to decrease when aqueous sulfide species begin to accumulate. This may be due to formation and precipitation of PoS, however, Eh–pH diagrams suggest PoS would not be stable in study-area groundwater. An alternative explanation for the study area is that H2S accumulation begins when anaerobic S cycling stops because Mn oxides are depleted and their reduction is no longer releasing 210Po. Common features of 210Po-enriched groundwater were identified by comparing the radiological and geochemical data from Nevada with data from naturally-enriched wells in Finland, and Florida and Maryland in the USA. Values of pH ranged from 9 in Nevada wells, indicating that pH is not critical in determining whether 210Po is present. Where U is present in the sediments, the data suggest 210Po levels may be elevated in aquifers with (1) SO4-reducing waters with low H2S

  14. poCAMon personal online continuous airmonitor; poCAMon online Personen Aerosolmonitor

    Energy Technology Data Exchange (ETDEWEB)

    Streil, T.; Oeser, V. [SARAD GmbH, Dresden (Germany)

    2015-07-01

    The poCAMon combines a very compact design with a high flow rate and long battery life. Its size and weight are still acceptable for carrying by one person. The unit measures long-lived aerosols as well as short-lived Radon/Thoron daughters by alpha spectroscopy and beta counting. The radioactive aerosols and particles are collected on the surface of a high resolution membrane filter. The alpha and beta decays on the filter are measured by a high-end semiconductor radiation detector (400 mm@). This allows a perfect separation of the different decay products. The increased pump rate (more than 3 l/ min) is suitable for lower detection limits. A sensor measures permanently the pressure drop on the filter in order to recognize an exhausted or perforated filter instantly. With the 3.8 Ah NiMH battery pack the poCAMon achieves an operation time of more than 30 hours. The quality control is a main issue of any radiation measurement. Therefore the poCAMon records a complete alpha spectrum for each measured value. This allows the monitoring of the device's perfect operation in each moment of the measurement. There are options for additional sensors for carbon monoxide and combustible gases as needed in underground mines. All measured data are stored in a 2GB memory card and can be accessed with a PC or laptop via a USB interface. Data transmission and device control can also be done via wireless ZigBee network or via a server for stationary operation with network access. A barometric pressure sensor and a GPS receiver are optional features of the device.

  15. Arcabouço de PRP-gel associado a células tronco mesenquimais: uso em lesões condrais em modelo experimental equino

    Directory of Open Access Journals (Sweden)

    Ana Lúcia M. Yamada

    2016-06-01

    Full Text Available Resumo: O plasma rico em plaquetas (PRP é conhecido por apresentar propriedades anabólicas, anti-inflamatórias e capacidade de gelificação. Atualmente o PRP é considerado eficaz na reparação da cartilagem, sendo sua capacidade de formação de gel indicada para o preenchimento de defeitos condrais. O objetivo desse estudo foi analisar o uso do PRP ativado, no formato de arcabouço, como suporte para o implante de células tronco mesenquimais (CTM, no preenchimento e tratamento de lesões condrais induzidas em equinos. Doze equinos foram submetidos a uma cirurgia artroscópica no tempo zero do experimento (T0, onde foi induzida uma lesão condral de 15 mm de diâmetro na tróclea medial femoral dos membros pélvicos direito. As 12 articulações foram divididas em dois grupos distintos com seis articulações cada (GA e GB. As articulações do GA foram submetidas ao tratamento com o implante de CTM em gel de PRP. As articulações de GB foram o grupo controle do experimento. As CTMs foram extraídas do tecido adiposo e o PRP em gel foi obtido por protocolo de dupla centrifugação seguido da adição de trombina liofilizada. Após cinco meses (T150 foi realizada nova artroscopia para avaliação macroscópica do local, coleta de amostras do tecido de reparação para análises de microscopia eletrônica, sendo realizadas imagens ressonância magnética e tomografia computadorizada no local do implante no GA. Observamos que o gel de PRP associado às CTM demonstrou ser adequado no tratamento de defeitos condrais experimentais dos equinos. GA evidenciou um melhor aspecto macroscópico e microscópico do tecido de reparação, sendo que GB mostrou maior desorganização das fibras colágenas. Nas imagens de ressonância magnética e tomografia computadorizada apenas foi relevante o local da lesão condral. O arcabouço de gel de PRP demonstrou ser apropriado no suporte do tratamento com as CTMs, sendo de fácil aplicação e efetivo

  16. Literatura bop: a poética do desaprendizado entre Charlie Parker e Julio Cortázar

    OpenAIRE

    Mansur, Daniel Valentim

    2014-01-01

    Este trabalho tem o objetivo de analisar as formas de criação artística engendradas pelo escritor Julio Cortázar a partir da noção de poética e de desaprendizado que ele retira da musicalidade do saxofonista Charlie Parker, um dos precursores do bebop surgido na virada para a década de 1940. Focando obras literárias e críticas selecionadas, produzidas pelo autor entre as décadas de 1940 e 1960, tentamos demonstrar como a transformação de Parker em personagem de Cortázar (Parker...

  17. Análise paramétrica e dimensionamento de poços de infiltração para fins de drenagem urbana

    OpenAIRE

    Vinicius Carvalho Peixoto

    2011-01-01

    A combinação entre a falta de planejamento urbano e o crescimento indiscriminado de áreas impermeáveis é responsável pela ocorrência de enchentes em centros urbanos. O emprego de dispositivos de controle do escoamento superficial na fonte geradora, como poços e trincheiras de infiltração, pavimentos permeáveis e jardins de infiltração (rain gardens), é uma alternativa que permite restabelecer o processo de infiltração em áreas urbanas densamente impermeabilizadas. Neste contexto, efetuou-se u...

  18. Uso do solo em zonas de proteção de poços para abastecimento público na cidade de João Pessoa (PB The use of soil in areas of protection of wells to public water supply in João Pessoa city (PB, Brazil

    Directory of Open Access Journals (Sweden)

    Germana Leite Gonzalez Toscano

    2012-12-01

    Full Text Available Os aquíferos, em especial as ocorrências no meio urbano, são bastante susceptíveis à contaminação ou poluição devido à concentração de atividades incompatíveis com as áreas que deveriam receber restrição de uso do solo. O objetivo deste trabalho foi analisar o uso do solo nos perímetros de proteção de captação de águas subterrâneas, destinados ao abastecimento público na cidade de João Pessoa (PB. A partir dos perímetros de proteção já delimitados, através de visitas de campo e observação de imagem de satélite, foi realizado o estudo do uso do solo nas suas áreas internas. Foi constatado o exercício de atividades proibidas ou condicionadas nas áreas que deveriam ser protegidas. A pesquisa feita demonstrou a necessidade de disciplinamento das atividades potencialmente poluidoras das águas subterrâneas e vem contribuir como um instrumento de utilidade para a construção de políticas para o disciplinamento das atividades no solo urbano.The aquifers, especially those that occur in urban areas, are very susceptible to contamination or pollution due to the concentration of incompatible activities with the areas that should receive restriction on land use. The objective of this work was to analyze land use in the protected groundwater caption perimeter for the public supply in João Pessoa city (Brazil. From protection perimeters already defined, a study was made of the land use of internal areas through field visits, and observation of satellite image. The exercise of activities prohibited or constrained in the areas that should be protected was noted. The research demonstrated the need to regulate activities that potentially pollute the groundwater and contributes as a useful tool for building policies for the planning of activities on urban land.

  19. Falsa interface como recurso poético na obra interativa

    Directory of Open Access Journals (Sweden)

    Milton Terumitsu Sogabe

    Full Text Available Resumo O conceito de "falsa interface" nasce da observação e produção de instalações interativas mediadas pela tecnologia digital. A "falsa interface" não é uma interface tecnológica que permite ao público a interação com um sistema digital, mas é um recurso poético, geralmente um aparato ou objeto artesanal com o qual o público interage com a obra de arte, que é um sistema. A "falsa interface" apresenta uma relação física, uma conexão com uma interface tecnológica. O público se relaciona ludicamente com a falsa interface e a interface tecnológica passa despercebida, em segundo plano, embora seja ela que capte e envie para o sistema a atuação do público.

  20. Microstructure and Properties of CePO4 Ceramic

    Institute of Scientific and Technical Information of China (English)

    WANG Lijuan; DU Haiyan; OU Xiujuan

    2006-01-01

    Cerium phosphate powders were synthesized by direct solid liquid reaction of cerium dioxide and phosphate acid at the Ce∶P ratio of 1∶1. Phase-pure and fine grain size CePO4 powers could be obtained by calcining the as received powders at the temperature higher than 600 ℃. It is demonstrated that the grain size and morphology of the CePO4 powders were calcined at various temperatures. An interesting layered crystal structure and a series of microcracks that cross and occur along the extrusion stress direction on the extruded surface inside CePO4 were observed. The ductility and machinabililty of CePO4 ceramic are attributed to the layered structure. Continuous machining debris was observed on the turned surface.

  1. Polonium 210Po in the phytobenthos from Puck Bay.

    Science.gov (United States)

    Skwarzec, B; Ulatowski, J; Strumińska, D I; Falandysz, J

    2003-04-01

    The aim of the work was to determine the 210Po content in phytobenthos species (seaweeds and angiosperms) from Puck Bay (southern Baltic). Alpha spectrometry was used to measure and calculate the activities and concentrations of polonium 210Po in the phytobenthos. The activity of 210Po in Puck Bay waters was determined to estimate the bioconcentration factors (BCF) of these plants. The 210Po concentration in water was estimated at 0.25 mBq dm(-3). The lowest polonium concentration in the phytobenthos was found in Cladophora rupestris (0.12 Bq kg(-1) wet wt.), the highest in Chara crinita (1.12 Bq kg(-1) wet wt.). Polonium is accumulated in these phytobenthos species; the bioconcentration factors (BCF) ranged from 450 to 4400.

  2. Properties of Light Hg, Pb and Po Isotopes

    CERN Document Server

    Muntian, I

    2003-01-01

    Quality of mass description for three different theoretical mass models is studied. Masses and deformations for Po, Pb and Hg isotopes are compared with experimental data. Gap in the proton single particle energy spectrum is discussed.

  3. The PoGOLite control system and software

    CERN Document Server

    Jackson, M S

    2013-01-01

    The autonomous control system of PoGOLite is presented. PoGOLite is a balloon borne X-ray polarimeter designed to observe point sources. To obtain scientific data with optimal efficiency, independent of the ground connection, the payload control system has been made autonomous in most functions. The overall system architecture and the interconnections between components, as well as the automation philosophy and software, are described. Results of performance tests are given.

  4. Vítimas e vilões em reality shows no Brasil: representações e avaliações com base em evidências léxico-gramaticais

    Directory of Open Access Journals (Sweden)

    Cristiane Fuzer

    2012-12-01

    Full Text Available O objetivo deste trabalho é analisar, com base em ocorrências léxico-gramaticais e semântico-discursivas, representações construídas em artigos de opinião publicados em jornais brasileiros. Foram verificadas as funções léxico-gramaticais desempenhadas pelos atores sociais selecionados a partir da recorrência no corpus, bem como as marcas de avaliação para as representações identificadas. Para isso, foram utilizados pressupostos teóricos da Linguística Sistêmico-Funcional, combinando categorias do sistema de transitividade de Halliday e Matthiessen (2004, das formas de representação de atores sociais de Van Leeuwen (1997 e do sistema de avaliatividade de Martin e White (2005. Os resultados mostram que os atores sociais mais frequentes no discurso são o próprio articulista, o reality show, os participantes do programa e os telespectadores. Eles aparecem ora ativados, ora passivados, dependendo do contexto linguístico a que se relacionam. A presença de marcas linguísticas de julgamento e apreciação, muitas vezes acompanhadas de gradação, evidencia avaliações negativas para o reality show e seus agentes, ao passo que o uso de marcas de afeto sinaliza uma defesa dos participantes por parte da voz autoral. Assim como os brothers, telespectadores brasileiros são representados como vítimas do sistema capitalista vigente, que se faz presente nas dinâmicas dos reality shows.

  5. VÍTIMAS E VILÕES EM REALITY SHOWS NO BRASIL: REPRESENTAÇÕES E AVALIAÇÕES COM BASE EM EVIDÊNCIAS LÉXICO-GRAMATICAIS

    Directory of Open Access Journals (Sweden)

    Cristiane Fuzer

    2012-01-01

    Full Text Available O objetivo deste trabalho é analisar, com base em ocorrências léxico-gramaticais e semântico-discursivas, representações construídas em artigos de opinião publicados em jornais brasileiros. Foram verificadas as funções léxico-gramaticais desempenhadas pelos atores sociais selecionados a partir da recorrência no corpus, bem como as marcas de avaliação para as representações identificadas. Para isso, foram utilizados pressupostos teóricos da Linguística Sistêmico-Funcional, combinando categorias do sistema de transitividade de Halliday e Matthiessen (2004, das formas de representação de atores sociais de Van Leeuwen (1997 e do sistema de avaliatividade de Martin e White (2005. Os resultados mostram que os atores sociais mais frequentes no discurso são o próprio articulista, o reality show, os participantes do programa e os telespectadores. Eles aparecem ora ativados, ora passivados, dependendo do contexto linguístico a que se relacionam. A presença de marcas linguísticas de julgamento e apreciação, muitas vezes acompanhadas de gradação, evidencia avaliações negativas para o reality show e seus agentes, ao passo que o uso de marcas de afeto sinaliza uma defesa dos participantes por parte da voz autoral. Assim como os brothers, telespectadores brasileiros são representados como vítimas do sistema capitalista vigente, que se faz presente nas dinâmicas dos reality shows.

  6. Improving rate performance of LiFePO{sub 4} cathode materials by hybrid coating of nano-Li{sub 3}PO{sub 4} and carbon

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Shi-Xi, E-mail: zhaosx@sz.tsinghua.edu.cn [Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055 (China); Ding, Hao; Wang, Yan-Chao [Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055 (China); School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Li, Bao-Hua [Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055 (China); Nan, Ce-Wen [School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

    2013-07-25

    Highlights: •This paper reports an improved solid-state method which leads to a uniform coating. The influence of Li{sub 3}PO{sub 4} and carbon coating on the electrochemical performance of LiFePO{sub 4} was studied. •LiFePO{sub 4} coating with Li{sub 3}PO{sub 4} and carbon shows a higher capacity than pure carbon coating sample. •Results indicate that the surface structure has an important influence on the electrochemical performance of LiFePO{sub 4}. The addition of Li{sub 3}PO{sub 4} can decrease the interfacial resistance of Li FePO{sub 4}. -- Abstract: Li{sub 3}PO{sub 4} coating on the surface of LiFePO{sub 4} particles was prepared by direct dispersing LiFePO{sub 4} precursor in starch slurry with nano-Li{sub 3}PO{sub 4}. The existence of nano-Li{sub 3}PO{sub 4} was confirmed with X-ray powder diffraction (XRD). And the particle size and morphology were observed by scanning electron microscope (SEM) and transmission electron microscope analysis (TEM). The effects of the mixture coating on rate performance of LiFePO{sub 4} cathode vs Li anode at 25 °C was investigated. Li{sub 3}PO{sub 4} and carbon mixing coated LiFePO{sub 4} cathode materials exhibited markedly improved rate capability relative to bare carbon-coated LiFePO{sub 4}. Analyses on cell impedance showed that the Li{sub 3}PO{sub 4} coating decreased the interfacial impedance. Transmission electron microscope analysis, electrochemical impedance spectroscopy (EIS) and cyclic voltammograms (CV) were carried out to explain the reason of better rate performance by Li{sub 3}PO{sub 4} coating.

  7. Principles of failure probability assessment (PoF)

    Energy Technology Data Exchange (ETDEWEB)

    Giribone, R. [Bureau Veritas, Energy and Process Business Line, 17 bis Place des Reflets, Courbevoie 92400 (France); Valette, B. [Bureau Veritas, Energy and Process Business Line, 17 bis Place des Reflets, Courbevoie 92400 (France)]. E-mail: bernard.valette@bureauveritas.com

    2004-11-01

    This abstract presents a method for computing Probability of Failure (PoF) namely the method integrating the so-called 'Bayesian approach'. PoF along with the assessment of the consequences of failure are required when it comes to assessing 'risks'. More and more frequently, in modern industries, the trend is to rely on the use of risk-based approaches for the scheduling of the inspection of static pressure vessels. Equipment PoF is the main driver for scheduling periodical inspections. Within the Bayesian approach, it is expected that the performance of inspection, provided effective techniques are used, increases the knowledge we have on the equipment condition and help us gain confidence in the planning of future inspections. The paper thus describes the theoretical principles yielding to the calculation of the PoF prior to conduct an inspection and after its performance. PoF calculation within a Risk-Based Inspection (RBI) planning is one of the aspects covered by the EU project called 'RIMAP' (Risk-Based Inspection and Maintenance Procedure). PoF calculation using Bayes theorem is the cornerstone of the RBI methodology described in American Petroleum Institute reference 'API 581'.

  8. Investigation on Ductile Property of CePO4 Ceramic

    Institute of Scientific and Technical Information of China (English)

    王丽娟; 刘家臣; 王凯利; 霍伟荣; 高海

    2003-01-01

    Average grain size of chemicalty synthesized CePO4 powder increases with incre asing calcining temperature. The strength 184 Mpa and toughness 4.8 Mpa*m1/ 2 were achieved when the green compacts were sintered at 1500 ℃ for 2 h in air . They show that stepped or multilayered fracture occurs within CePO4 granules. CePO4 ceramic could be cut, drilled or turned easily using conventional metal-machining tools. Continuous machining debris was observed on turned surface. Indentation pressure stress-strain curve showes extensive nonlinear behavior, and a series of microcracks which crack cross and occur along the extrusion stre ss direction were observed on extruded surface, indicating single-phase CePO4 ceramic is "ductile". Based on the fracture analyses in cross-section surface, the ductility of CePO4 ceramic is considered to be associated with the cleavage of multilayered CePO4 grains and the fragment resetting to adapt to stress.

  9. Assessment of ²¹⁰Po in Italian diet.

    Science.gov (United States)

    Meli, Maria Assunta; Desideri, Donatella; Roselli, Carla; Feduzi, Laura

    2014-07-15

    This research was dedicated to the study, in the Italian daily diet, of the background activity concentration of (210)Po, a radionuclide with a high radiotoxicity. (210)Po was determined by alpha spectrometry. For food products of vegetable origin, the (210)Po activity concentration follows the trend: leafy vegetable>flour>rice>fruits>pasta>other vegetables>fruit vegetable; for those of animal origin: eggs>cheese>milk. The (210)Po activity concentration was also compared with that found by the same authors in meat, sea food, water and beverages in a previous study. The committed effective doses to individuals of three population groups (infants, children and adults) were 379, 222 and 151 μSv y(-1), respectively. The intake of foods of marine origin contributed about 67% of the total dose due to (210)Po ingestion. The effective dose, from (210)Po ingested by total diet, accounts for only 5-12% of the natural radiation exposure in Italy. Copyright © 2014 Elsevier Ltd. All rights reserved.

  10. Relational Aggression in Children with Preschool Onset (PO) Psychiatric Disorders

    Science.gov (United States)

    Belden, Andy C.; Gaffrey, Michael S.; Luby, Joan L.

    2012-01-01

    Objective The role of preschool onset (PO) psychiatric disorders as correlates and/or risk factors for relational aggression during kindergarten or 1st grade was tested in a sample of N = 146 preschool-age children (3 to 5.11). Method Axis-I diagnoses and symptom scores were derived using the Preschool Age Psychiatric Assessment. Children’s roles in relational aggression as aggressor, victim, aggressive-victim, or non-aggressor/non-victim were determined at preschool and again 24 months later at elementary school entry. Results Preschoolers diagnosed with PO-psychiatric disorders were 3 times as likely as the healthy preschoolers to be classified aggressors, victims, or aggressive-victims. Children diagnosed with PO-disruptive, depressive, and/or anxiety disorders were at least 6 times as likely as children without PO-psychiatric disorders to become aggressive-victims during elementary school after covarying for other key risk factors. Conclusions Findings suggested that PO-psychiatric disorders differentiated preschool and school-age children’s roles in relational aggression based on teacher-report. Recommendations for future research and preventative intervention aimed at minimizing the development of relational aggression in early childhood by identifying and targeting PO-psychiatric disorders are made. PMID:22917202

  11. BiPO4@Ag3 PO4核/壳异质结的制备及光催化性能%Fabrication and Photocatalytic Activity of BiPO4@Ag3 PO4 Core/Shell Heterojunction

    Institute of Scientific and Technical Information of China (English)

    任延琳; 李新勇; 肇启东

    2014-01-01

    采用简单的水热法结合离子交换法制备了BiPO4@Ag3 PO4核/壳异质结光催化剂,采用场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、紫外-可见漫反射光谱仪(DRS)和 X 射线光电子能谱仪(XPS)等对催化剂的形貌、组成、晶型和光物理性质等进行了研究,用罗丹明B(RhB)为模拟水体中有机污染物分别在可见光和模拟太阳光照条件下对催化剂的催化活性进行了测试。结果表明,负载 Ag3 PO4的BiPO4微米棒具有较高的可见光响应,其核/壳异质结结构有利于光生电子-空穴对的有效分离和提高对RhB的光催化降解效率,在可见光和模拟太阳光照射条件下分别在60和40 min可使RhB完全脱色降解。活性物种检测实验结果证明,该催化剂在污染物降解过程中主要的机理是光生空穴的直接氧化。%BiPO4@Ag3 PO4 core/shell heterojuction photocatalyst was synthesized through a facile hydrother-mal process followed by the ion-exchange method. The morphology, crystallinity, composition, and photophy-sical properties of the catalyst were systematically investigated by scanning electron microscope( SEM) , X-ray diffraction(XRD), energy dispersive X-ray analysis, UV-Vis diffuse reflectance spectrophotometer(DRS) and X-ray photoelectron spectroscopy( XPS) . Meanwhile, Rhodamine B( RhB) was chosen as the target pollutant to evaluate the photocatalytic activity of BiPO4@Ag3 PO4 photocatalyst under the visible light and simulated sunlight irradiation, respectively. The results show that RhB was almost totally degraded in 60 min under visi-ble-light irradiation and in 40 min under sunlight irradiation, respectively. The BiPO4@Ag3 PO4 core/shell heterojunction photocatalyst displayed enhanced photocatalytic activity against RhB, which is attributed to the effective charge separation by the core/shell heterojuction between the Ag3 PO4 and BiPO4 . Active species de-tection experiments proved that during

  12. Avanços na inaloterapia em pediatria Advances in inhalation therapy in pediatrics

    Directory of Open Access Journals (Sweden)

    Fábio Pereira Muchão

    2010-10-01

    Full Text Available OBJETIVOS: Revisar os artigos mais relevantes a respeito dos aspectos técnicos da terapêutica inalatória, dos inaladores disponíveis e principalmente dos principais avanços obtidos na inaloterapia em pediatria. FONTES DOS DADOS: Foram revisados os artigos contidos na base de dados MEDLINE a partir de 1983, além de capítulos de livros, e selecionados os de maior importância de acordo com os critérios estabelecidos para este artigo. SÍNTESE DOS DADOS: Os nebulizadores convencionais apresentam uma série de inconveniências, sendo que inaladores com desempenho melhorado pela respiração e os ativados pela respiração são opções mais atrativas. Dentre os inaladores de pó seco, destacam-se os que utilizam mecanismos passivos e ativos de dispersão de pó, que propiciam maiores taxas de deposição pulmonar das drogas. Entre os inaladores pressurizados dosimetrados destacam-se os ativados pela respiração, os coordenados pela respiração e os modificadores de velocidade. Devem ser usados preferencialmente em conjunto com espaçadores, pois a utilização deste aumenta em até duas vezes a deposição pulmonar das drogas. CONCLUSÕES: Para menores de 8 anos, os inaladores pressurizados dosimetrados com espaçadores são os mais adequados, dada a sua praticidade associada à elevada deposição pulmonar que proporcionam. Nos maiores de 8 anos capazes de gerar altos fluxos inspiratórios, os dispositivos de pó são os mais indicados.OBJECTIVES: To review the most relevant articles regarding the technical aspects of inhalation therapy, inhalers currently available, and especially major advances in inhalation therapy in pediatrics. SOURCES: Articles of MEDLINE database from 1983 were reviewed, in addition to book chapters, and the most important studies were selected according to the criteria established for this article. SUMMARY OF THE FINDINGS: Conventional nebulizers have a number of inconveniences, and breath-enhanced and breath

  13. eNOS se correlaciona com a biogênese mitocondrial em corações com cardiopatia congênita e cianose

    Directory of Open Access Journals (Sweden)

    Juan Xiao

    2012-09-01

    Full Text Available FUNDAMENTO: O programa de biogênese mitocondrial no coração parece apresentar remodelação adaptativa após estresse biomecânico e oxidativo. Os mecanismos adaptativos que protegem o metabolismo do miocárdio durante a hipóxia são coordenados, em parte, pelo óxido nítrico (NO. OBJETIVO: Observar a biogênese mitocondrial e expressão do óxido nítrico sintase (NOS em corações de cardiopatia congênita com cianose; discutir a resposta mitocondrial à hipóxia crônica do miocárdio. MÉTODOS: Foram investigados 20 pacientes com defeitos cardíacos cianóticos (n = 10 ou acianóticos (n = 10. Foram estudadas amostras do miocárdio na via de saída ventricular direita, tomadas durante a operação. A análise morfométrica de mitocôndrias foi realizada por microscopia eletrônica de transmissão. A relação mtDNA/nDNA foi determinada com PCR em tempo real. Os níveis de transcrição da subunidade I da citocromo c oxidase (COXI, coativador-1α do receptor γ ativado por proliferador de peroxissoma (PGC-1α, o fator respiratório nuclear 1 (NRF1, e fator de transcrição mitocondrial A (Tfam foram detectados por reação em cadeia da polimerase via transcriptase reversa (RT-PCR ativado por fluorescência em tempo real. Os níveis proteicos de COXI e nNOS, iNOS e eNOS foram medidos por técnica de Western Blot. RESULTADOS: A densidade volumétrica mitocondrial (Vv e a densidade numérica (Nv foram significativamente elevadas em pacientes com cianose, em comparação com a cardiopatia congênita acianótica. MtDNA elevada e suprarregulação dos níveis de COXI, PGC-1 α, NRF1 e Tfam mRNA foram observadas em pacientes cianóticos. Os níveis de proteína de COXI e eNOS foram significativamente maiores no miocárdio de pacientes cianóticos que nos de acianóticos. Os níveis de transcrição do PGC-1α se correlacionam com os níveis de eNOS. CONCLUSÃO: A biogênese mitocondrial é ativada no miocárdio da via de saída ventricular na

  14. HAICAIS EM MANOEL DE BARROS

    Directory of Open Access Journals (Sweden)

    Profª Drª Nery Reiner

    2012-09-01

    Full Text Available O objetivo deste artigo, voltado para a criação poética de Manoel de Barros, é focalizar o conceito da obra de arte como jogo. Escolhemos Manoel de Barros, porque o lúdico, a brincadeira e o humor estão sempre presentes em sua obra. A escolha dos dados, o encaixe de palavras escolhidas a dedo, no eixo paradigmático, formam um caleidoscópio, mostrando novas estruturas, deixando explícito o desejo de brincar com os elementos linguísticos e da natureza. Para este trabalho, escolhemos, para análise, pequenos poemas semelhantes aos haicais japoneses e outros menores ainda, com dois ou até um verso apenas. Contaremos, nesta pesquisa, com a ajuda de teóricos como Johan Huizinga, Ezra Pound, Octavio Paz, Lévi-Strauss, Olga Savary e Alfredo Bosi.

  15. PoV-GAME: PUNTOS DE VISTA MEDIANTE JUEGOS PoV-GAME: VIEWPOINTS THROUGH GAMES

    Directory of Open Access Journals (Sweden)

    Carlos Zapata-Jaramillo

    2012-06-01

    Full Text Available El desarrollo de proyectos de software considera importante la consistencia entre la información entregada por todos los interesados de una aplicación. En otras palabras, se procura llegar a acuerdos entre los diferentes puntos de vista de cada actor y llevarlos a cabo durante todo el proyecto. Con los métodos de enseñanza tradicionales se procura formar habilidades en este campo, pero no se afianzan mediante la práctica que, generalmente, se emplea para el aprendizaje en este campo. Por ello, en este artículo se propone ''PoV-GAME'', una nueva forma de ''jugar aprendiendo'', la cual busca fortalecer algunos conceptos básicos en la ingeniería de software como la consistencia en la información que se maneja a lo largo de un proyecto y afianzar la importancia de los puntos de vista en el desarrollo de un producto de software. Posteriormente, se analizan los resultados obtenidos luego de realizar el juego en diferentes grupos de estudiantes.Information for software applications is delivered by the stakeholders. Software development projects need consistency as an important aspect of such information. In other words, agreement among the different viewpoints must be reached in order to be implemented in the project. Well-known teaching methods try to create capabilities in this field, but they fail in reinforcing them in practice, which is commonly used for teaching in this field. Therefore, in this paper we propose ''PoV GAME'' a new way of ''play-to-learn''. We aim the reinforcement of some basic concepts about software engineering such as consistency in the information handled throughout the project, and the importance of viewpoints in the software product development. Subsequently, we analyze the results obtained after holding the game in several groups of students.

  16. Scatterometry Products Distributed by JPL PO.DAAC

    Science.gov (United States)

    Chen, R. L.; Lungu, T.; Benada, J. R.

    2001-12-01

    The Physical Oceanography Distributed Active Archive Center (PO.DAAC) at the Jet Propulsion Laboratory (JPL) archives and distributes physical oceanography data, including data from spacebased scatterometers. PO.DAAC's current archive contains more than six terabytes of scatterometry data, and PO.DAAC has distributed over 40 terabytes of that data to users worldwide. Those numbers increase steadily with the continuation of the QuikSCAT satellite, and that increase should effectively double with the pending launch of SeaWinds on ADEOS-II. The SeaWinds on QuikSCAT instrument provides the largest component of PO.DAAC's scatterometry data. Every day, the instrument makes 400,000 measurements and covers 90% of the ice-free oceans for wind data, with additional useful information over land and ice. PO.DAAC publicly distributes two QuikSCAT products: - Level 3 Daily, Gridded Ocean Wind Vectors (JPL SeaWinds Project) - Level 2B Ocean Wind Vectors in 25 Km Swath Grid (JPL SeaWinds Project) Scheduled to launch in February 2002, the SeaWinds on ADEOS-II instrument will provide a similar amount of data as QuikSCAT. PO.DAAC will again publicly distribute the level 2B and the level 3 products. Other scatterometry data currently available from PO.DAAC include: - BYU Daily Browse Images of QuikSCAT Sigma-0 Measurements (D. Long) - NSCAT Scatterometer ocean wind products - NSCAT Scatterometer Science Product, Levels 1.7, 2, 3 - NSCAT scatterometer global 25km sigma-0 and ocean winds (Dunbar) Samples of some of these datasets are presented.

  17. RAPID DETERMINATION OF {sup 210} PO IN WATER SAMPLES

    Energy Technology Data Exchange (ETDEWEB)

    Maxwell, S.

    2013-05-22

    A new rapid method for the determination of {sup 210}Po in water samples has been developed at the Savannah River National Laboratory (SRNL) that can be used for emergency response or routine water analyses. If a radiological dispersive device (RDD) event or a radiological attack associated with drinking water supplies occurs, there will be an urgent need for rapid analyses of water samples, including drinking water, ground water and other water effluents. Current analytical methods for the assay of {sup 210}Po in water samples have typically involved spontaneous auto-deposition of {sup 210}Po onto silver or other metal disks followed by counting by alpha spectrometry. The auto-deposition times range from 90 minutes to 24 hours or more, at times with yields that may be less than desirable. If sample interferences are present, decreased yields and degraded alpha spectrums can occur due to unpredictable thickening in the deposited layer. Separation methods have focused on the use of Sr Resin, often in combination with 210Pb analysis. A new rapid method for {sup 210}Po in water samples has been developed at the Savannah River National Laboratory (SRNL) that utilizes a rapid calcium phosphate co-precipitation method, separation using DGA Resin (N,N,N,N-tetraoctyldiglycolamide extractant-coated resin, Eichrom Technologies or Triskem-International), followed by rapid microprecipitation of {sup 210}Po using bismuth phosphate for counting by alpha spectrometry. This new method can be performed quickly with excellent removal of interferences, high chemical yields and very good alpha peak resolution, eliminating any potential problems with the alpha source preparation for emergency or routine samples. A rapid sequential separation method to separate {sup 210} Po and actinide isotopes was also developed. This new approach, rapid separation with DGA Resin plus microprecipitation for alpha source preparation, is a significant advance in radiochemistry for the rapid

  18. Comparison of electrochemical performances of olivine NaFePO4 in sodium-ion batteries and olivine LiFePO4 in lithium-ion batteries

    Science.gov (United States)

    Zhu, Yujie; Xu, Yunhua; Liu, Yihang; Luo, Chao; Wang, Chunsheng

    2012-12-01

    Carbon-coated olivine NaFePO4 (C-NaFePO4) spherical particles with a uniform diameter of ~80 nm are obtained by chemical delithiation and subsequent electrochemical sodiation of carbon-coated olivine LiFePO4 (C-LiFePO4), which is synthesized by a solvothermal method. The C-NaFePO4 electrodes are identical (particle size, particle size distribution, surface coating, and active material loading, etc.) to C-LiFePO4 except that Li ions in C-LiFePO4 are replaced by Na ions, making them ideal for comparison of thermodynamics and kinetics between C-NaFePO4 cathode in sodium-ion (Na-ion) batteries and C-LiFePO4 in lithium-ion (Li-ion) batteries. In this paper, the equilibrium potentials, reaction resistances, and diffusion coefficient of Na in C-NaFePO4 are systematically investigated by using the galvanostatic intermittent titration technique (GITT), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), and compared to those of the well-known LiFePO4 cathodes in Li-ion batteries. Due to the lower diffusion coefficient of Na-ion and higher contact and charge transfer resistances in NaFePO4 cathodes, the rate performance of C-NaFePO4 in Na-ion batteries is much worse than that of C-LiFePO4 in Li-ion batteries. However, the cycling stability of C-NaFePO4 is almost comparable to C-LiFePO4 by retaining 90% of its capacity even after 100 charge-discharge cycles at a charge-discharge rate of 0.1 C.Carbon-coated olivine NaFePO4 (C-NaFePO4) spherical particles with a uniform diameter of ~80 nm are obtained by chemical delithiation and subsequent electrochemical sodiation of carbon-coated olivine LiFePO4 (C-LiFePO4), which is synthesized by a solvothermal method. The C-NaFePO4 electrodes are identical (particle size, particle size distribution, surface coating, and active material loading, etc.) to C-LiFePO4 except that Li ions in C-LiFePO4 are replaced by Na ions, making them ideal for comparison of thermodynamics and kinetics between C-NaFePO4 cathode in

  19. Forma nervosa de listeriose em caprinos Listeric meningoencephalitis in goats

    Directory of Open Access Journals (Sweden)

    Daniel R. Rissi

    2006-03-01

    Full Text Available Em um rebanho de 100 caprinos, foram observados casos de uma doença neurológica em três animais adultos jovens (identificados como A-C entre outubro e dezembro de 2004. Os sinais clínicos incluíam desvio da cabeça, torcicolo, nistagmo, andar desequilibrado e quedas que acabavam em decúbito, durante o qual o caprino executava movimentos de pedalagem com os membros rígidos. Tratamento com antibióticos no Caprino C resultou em remissão temporária dos sinais. A evolução clínica foi de 5, 10 e 30 dias, respectivamente, para os Caprinos A, B e C. O Caprino A morreu espontaneamente e os outros dois foram eutanasiados na fase terminal da doença. Não foram observadas alterações macroscópicas. Lesões histológicas eram predominantemente unilaterais e consistiam de alterações inflamatórias e degenerativas que se estendiam do bulbo ao tálamo. Em todos os casos havia manguitos perivasculares de um ou mais tipos de células mononucleares (linfócitos, plasmócitos, macrófagos ativados e ocasionalmente neutrófilos associados a áreas de malacia onde células Gitter preenchiam os espaços de perda do parênquima. Adicionalmente, o Caprino B tinha microabscessos no bulbo, ponte, e mesencéfalo e infiltrado neutrofílico e linfocítico multifocal nos fascículos do nervo trigêmeo, próximo ao gânglio de Gasser, e nas leptomeninges do cerebelo. No tronco encefálico do Caprino C, a reação era multifocal e com característica granulomatosa e incluía células epitelióides e, ocasionalmente, células gigantes multinucleadas. Listeria sp foi detectada por imunoisto-química em cortes de mesencéfalo rotineiramente processado dos Caprinos A e C e de ponte do Caprino B.A neurologic disease was observed in three young adult goats (indentified as A-C from a herd of 100 goats during October-December, 2004. Clinical signs included head tilt, torticollis, nystagmus, staggering, falls and eventually recumbency and paddling, with stiff limbs

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

    Directory of Open Access Journals (Sweden)

    Dao-Yuan Zhang

    2012-06-01

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

  1. Comparison of electrochemical performances of olivine NaFePO4 in sodium-ion batteries and olivine LiFePO4 in lithium-ion batteries.

    Science.gov (United States)

    Zhu, Yujie; Xu, Yunhua; Liu, Yihang; Luo, Chao; Wang, Chunsheng

    2013-01-21

    Carbon-coated olivine NaFePO(4) (C-NaFePO(4)) spherical particles with a uniform diameter of ∼80 nm are obtained by chemical delithiation and subsequent electrochemical sodiation of carbon-coated olivine LiFePO(4) (C-LiFePO(4)), which is synthesized by a solvothermal method. The C-NaFePO(4) electrodes are identical (particle size, particle size distribution, surface coating, and active material loading, etc.) to C-LiFePO(4) except that Li ions in C-LiFePO(4) are replaced by Na ions, making them ideal for comparison of thermodynamics and kinetics between C-NaFePO(4) cathode in sodium-ion (Na-ion) batteries and C-LiFePO(4) in lithium-ion (Li-ion) batteries. In this paper, the equilibrium potentials, reaction resistances, and diffusion coefficient of Na in C-NaFePO(4) are systematically investigated by using the galvanostatic intermittent titration technique (GITT), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), and compared to those of the well-known LiFePO(4) cathodes in Li-ion batteries. Due to the lower diffusion coefficient of Na-ion and higher contact and charge transfer resistances in NaFePO(4) cathodes, the rate performance of C-NaFePO(4) in Na-ion batteries is much worse than that of C-LiFePO(4) in Li-ion batteries. However, the cycling stability of C-NaFePO(4) is almost comparable to C-LiFePO(4) by retaining 90% of its capacity even after 100 charge-discharge cycles at a charge-discharge rate of 0.1 C.

  2. Natural levels of {sup 210}Po in human urine

    Energy Technology Data Exchange (ETDEWEB)

    Diaz-Frances, I.; Manjon, G.; Mantero, J.; Diaz, J. [Departament of Applied Phisic II, University of Seville, P.O. Box 41012 Seville (Spain); Garcia-Tenorio, R. [Departament of Applied Phisic II, University of Seville, P.O. Box 41012 Seville (Spain); National Accelerator Centre, P.O. Box 41092 Seville (Spain)

    2014-07-01

    Since the secret agent Alexander Litvinenko was murdered in 2006 by a {sup 210}Po lethal dose, presumably ingested, there is renovated interest on the toxicity of this radionuclide in humans. {sup 210}Po is a radioactive isotope naturally found in nature, mainly incorporated by humans via food and water ingestion, as well as inhaled through its progenitor, the {sup 222}Rn. The total amount of natural {sup 210}Po in the human body can vary from person to person depending on their lifestyle: dietary habits, drinking water source, place of residence (associated with exposure to {sup 222}Rn), etc- and therefore in the concentrations of this element to be found in urine. To analyze the influence of dietary habits on the amount of {sup 210}Po excreted in urine, two volunteers in Seville had a well-defined and time-varying diet for a month, following a daily collection of their urine and determination of the concentrations therein of this radionuclide. The results obtained and the conclusions derived from them form the core of this communication. {sup 210}Po determinations were performed daily in 200 ml aliquots of urine using the technique of high resolution alpha spectrometry. This has involved the application of a single radiochemical method for the concentration and isolation {sup 210}Po, followed by its auto-deposition on copper planchets for proper measure. Daily {sup 210}Po activity concentrations in voluntary urine analyzed during the month of study show high variability with a difference of up to an order of magnitude between maximum and minimum values obtained, and a clear dependence on the diet type followed in the various stages of the experiment. The lowest concentrations obtained are associated with a diet rich in carbohydrates and proteins 'terrestrial' (pork, beef,...), while the highest concentrations were obtained in the final phase of the experiment when the diet was enriched with presence of marine products in fair correspondence with the

  3. Jean Aicard et les Poèmes de Provence. Lecture rhétorique du poème liminaire

    Directory of Open Access Journals (Sweden)

    Michèle Gorenc

    2003-09-01

    Full Text Available Insistant sur l’influence de l’art oratoire sur l’œuvre poétique de Jean Aicard, l’article propose une lecture rhétorique du poème liminaire de son recueil Poèmes de Provence.

  4. Semiótica e as ações cognitivas dos alunos em atividades de modelagem matemática: um olhar sobre os modos de inferência

    Directory of Open Access Journals (Sweden)

    Lourdes Maria Werle de Almeida

    2012-01-01

    Full Text Available Neste trabalho apresentamos algumas reflexões, à luz da semiótica peirceana, sobre a possibilidade de se introduzirem, na sala de aula, atividades que sinalizem potencial para se desenvolverem diferentes tipos de raciocínio e diferentes ações cognitivas nos estudantes. Iniciamos o trabalho com pressupostos teóricos da semiótica no que diz respeito aos modos de inferência abdução, dedução e indução e à Modelagem Matemática como alternativa pedagógica. Com o objetivo de investigar as relações entre as ações cognitivas evidenciadas em atividades de modelagem e os modos de inferência, analisamos uma atividade de modelagem desenvolvida por alunos de um curso de licenciatura em matemática. A partir dessa análise, concluímos que os modos de inferência ativados nessa atividade estão associados às ações cognitivas dos alunos durante as transições entre as diferentes etapas do desenvolvimento da atividade.

  5. Synthesis and Characterization of EO/PO Random Copolyethers

    Institute of Scientific and Technical Information of China (English)

    GUO Jian-guo; YUAN Ren-xu; HE Su-qin; ZHU Cheng-shen; JIAO Yu; JIANG Jian-ming

    2004-01-01

    Ethylene oxide(EO) and propylene oxide(PO) random copolyethers were synthesized by the sequential addition of the mixture of ethylene oxide and propylene oxide to propylene glycol (initiator) in the presence of potassium hydroxide(KOH), and characterized with infrared spectrum(FTIR) and nuclear magnetism resonance(NMR). The effects of catalyst concentration, reaction temperature, charging rate and EO/PO mixture ratio on the polymerization reaction were investigated. It was revealed that the optimal reaction condition is the ratio of 2.5:1000(KOH mass vs. product mass), at 114.6℃ and pressure below 0.4MPa. The residual KOH was neutralized by phosphoric acid(H3PO4). Then the crude copolyether was refined with adsorbents, and the refined copolyether, which contains less than 0.7μg/ml K+, was obtained as colorless, viscous liquid.

  6. Fósforo orgânico em horizontes diagnósticos superficiais de diferentes classes de solo

    Directory of Open Access Journals (Sweden)

    Ruthanna Isabelle de Oliveira

    2014-10-01

    Full Text Available Em solos tropicais, a disponibilidade de fósforo (P pode ser regulada pela decomposição e mineralização da fração lábil de P orgânico (Po, tornando necessários estudos para saber a sua real contribuição no solo. O objetivo deste trabalho foi avaliar o teor de Po total e lábil em horizontes superficiais de diferentes classes de solo e quais as propriedades do solo exercem controle na acumulação dessas frações de P. Foram estudadas amostras de diferentes horizontes diagnósticos superficiais, a saber: H e O hístico; A chernozêmico; e A húmicos, coletados em vários estados do Brasil. Para a determinação das frações totais de P inorgânico (Pi e orgânico (Po, foi usado o método da extração-sequencial ácido-alcalina, e a fração lábil de P foi determinada pela extração com bicarbonato de sódio. A taxa de recuperação de Pi + Po em relação à extração nítrico-perclórica do P total (PT variou de 46 a 99 %. O Po total variou entre 35 e 1077 mg kg-1, com uma média de 298 mg kg-1. Para a fração lábil do Po, os teores variaram entre 7,2 e 99,5 mg kg-1, com uma média de 27,1 mg kg-1. O Po variou, em média, de 36 a 46 % do P total extraído. Em relação ao P lábil, o Po representou mais de 70 % para todos os horizontes diagnósticos. O PT foi o principal atributo controlador da acumulação de Po nos solos pelas análises de correlação e regressão múltipla. Verificou-se que horizontes com baixa capacidade de adsorção de P proporcionaram alta labilidade de Po.

  7. Enhanced photo-stability and photocatalytic activity of Ag3PO4 via modification with BiPO4 and polypyrrole

    Science.gov (United States)

    Cai, Li; Jiang, Hui; Wang, Luxi

    2017-10-01

    Ag3PO4 photocatalysts modified with BiPO4 and polypyrrole (PPy) were successfully synthesized via a combination of co-precipitation hydrothermal technique and oxidative polymerization method. Their morphologies, structures and optical and electronic properties were characterized by means of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), Brunauer-Emmett-Teller (BET) surface areas, X-ray diffraction (XRD), fourier transform infrared spectra (FT-IR), X-ray photo-electron spectroscopy (XPS), UV-vis diffuse reflection spectra (UV-vis DRS), photocurrent technique and electrochemical impedance spectra (EIS). The typical triphenylmethane dye (malachite green) was chosen as a target organic contaminants to estimate the photocatalytic activities and photo-stabilities of Ag3PO4-BiPO4-PPy heterostructures under visible light irradiation. The results indicated that the existence of BiPO4 and PPy not only showed great influences on the photocatalytic activity, but also significantly enhanced photo-stability of Ag3PO4 in repeated and long-term applications. The degradation conversion of Ag3PO4-BiPO4-PPy heterostructures (ABP-3) was 1.58 times of that of pure Ag3PO4. The photo-corrosion phenomenon of Ag3PO4 was effectively avoided. The photocatalytic activity of up to 87% in the Ag3PO4-BiPO4-PPy heterostructures (ABP-3) can be remained after five repeated cycles, while only about 33% of the degradation efficiency can be reserved in pure Ag3PO4. The possible mechanism of enhanced photo-stability and photocatalytic activity of Ag3PO4-BiPO4-PPy heterostructures was also discussed in this work.

  8. Po-210 and other radionuclides in terrestrial and freshwater environments

    Energy Technology Data Exchange (ETDEWEB)

    Gjelsvik, Runhild; Brown, Justin (eds.) (Norwegian Radiation Protection Authority (Norway)); Holm, Elis (Univ. of Lund (Sweden)); Roos, Per (Risoe DTU (Denmark)); Saxen, Ritva; Outola, Iisa (STUK - Radiation and Nuclear Safety Authority (Finland))

    2009-01-15

    This report provides new information on Po-210 (and where appropriate its grandparent Pb-210) behaviour in environmental systems including humans. This has primarily been achieved through measurements of Po-210 in aquatic and terrestrial environments that has led to the derivation of information on the levels of this radioisotope in plants, animals and the biotic components of their habitat (i.e. water, soil) providing basic information on transfer where practicable. For freshwater environments, Po-210 concentration ratios derived for freshwater benthic fish and bivalve mollusc were substantially different to values collated from earlier review work. For terrestrial environments, activity concentrations of Po-210 in small mammals (although of a preliminary nature because no correction was made for ingrowth from Pb-210) were considerably higher than values derived from earlier data compilations. It was envisaged that data on levels of naturally occurring radionuclides would render underpinning data sets more comprehensive and would thus allow more robust background dose calculations to be performed subsequently. By way of example, unweighted background dose-rates arising from internal distributions of Po-210 were calculated for small mammals in the terrestrial study. The biokinetics of polonium in humans has been studied following chronic and acute oral intakes of selected Po radioisotopes. This work has provided information on gastrointestinal absorption factors and biological retention times thus improving the database upon which committed effective doses to humans are derived. The information generated in the report, in its entirety, should be of direct relevance for both human and non-human impact assessments. (au)

  9. Ocorrência de Staphylococcus aureus em queijo tipo "frescal"

    Directory of Open Access Journals (Sweden)

    Almeida Filho Edvaldo Sampaio de

    2000-01-01

    Full Text Available OBJETIVO: Verificar a ocorrência de Staphylococcus aureus em uma amostra de queijo tipo Minas "frescal" comercializado na cidade de Poços de Caldas, MG, de modo a obter subsídios que permitam avaliar o risco potencial que este produto pode representar para a saúde da população consumidora. MÉTODOS: Foi investigada a presença e o número de cepas de Staphylococcus aureus em 80 amostras de queijo tipo Minas "frescal" produzido artesanalmente e comercializado na cidade de Poços de Caldas, MG, Brasil. RESULTADOS: Os resultados obtidos evidenciaram a presença de S. aureus em 40 (50,0% amostras, cujas contagens revelaram valores médios em torno de 10(5/g. CONCLUSÕES: Tais achados parecem ser extremamente preocupantes, pois além de se situarem acima do limite máximo de 10³/g estabelecido pelo Ministério da Saúde, estes valores mostraram-se muito próximos dos requeridos para a produção de enterotoxinas em quantidades suficientes para a ocorrência de surtos de intoxicação alimentar estafilocócica.

  10. Influência do método de polimerização na microdureza de compósitos microhíbridos armazenados em água destilada = Influence of curing method on the micro hardness of microhybrid composites immersed in distilled water

    Directory of Open Access Journals (Sweden)

    Herbstrith Segundo, Regênio Mahfuz

    2007-01-01

    Full Text Available O objetivo do presente estudo é comparar e avaliar a microdureza Vickers de um compósito restaurador microhíbrido ativado por dois tipos de unidades polimerizadoras e armazenados em água destilada. Trinta espécimes foram feitos com resina Charisma B1, para cada um dos regimes de polimerização: fotopolimerização por luz halógena, fotopolimerização por LED e fotopolimerização mais ciclo adicional em autoclave. Foram feitas duas leituras de microdureza Vickers por corpo de prova em 1 dia, 7 dias e 14 dias de imersões. O ciclo adicional de polimerização mostrou uma tendência de aumentar os valores de microdureza dos compósitos restauradores, não mostrando diferenças estatisticamente significantes entre LED e Luz Halógena (p > 0,05

  11. La solitude du poète touareg

    OpenAIRE

    Casajus, Dominique

    2004-01-01

    International audience; L'article traite de la poésie touarègue contemporaine, des sentiments qu'elle exprime ou qu'elle suscite, des voies par lesquelles elle se transmet. Il a paru dans les Actes d'un colloque tenu à l'Université libre de Bruxelles en 2001, et dédié aux variations du sentiment triste dans les musiques du monde et les poésies ou chansons populaires. Les styles de musique abordés étaient, entre autres, le blues, le fado, le flamenco, le tango, etc. Le trouble provoqué par cet...

  12. Po Superconducting Magnet:detail of the windings

    CERN Multimedia

    1982-01-01

    The Po superconducting dipole was built as a prototype beam transport magnet for the SPS extracted proton beam Po. Its main features were: coil aperture 72 mm, length 5 m, room-temperature yoke, NbTi cable conductor impregnated with solder, nominal field 4.2 T at 4.7 K (87% of critical field). It reached its nominal field without any quench. The photo shows a detail of the inner layer winding before superposing the outer layer to form the complete coil of a pole. Worth noticing is the interleaved glass-epoxy sheet (white) with grooved channels for the flow of cooling helium. See also 8307552X.

  13. Structural and Electrochemical Characterization of Pure LiFePO4 and Nanocomposite C-LiFePO4 Cathodes for Lithium Ion Rechargeable Batteries

    OpenAIRE

    Arun Kumar(University of Delhi, Delhi, India); Thomas, R.; N. K. Karan; Saavedra-Arias, J. J.; M K Singh; Majumder, S. B.; Tomar, M. S.; Katiyar, R. S.

    2009-01-01

    Pure lithium iron phosphate (LiFePO4) and carbon-coated LiFePO4 (C-LiFePO4) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on LiFePO4 particles. Ex situ Raman spectrum of C-LiFePO4 at various stages of charging and discharging showed reversibility upon...

  14. A novel route for FePO4 olivine synthesis from sarcopside oxidation

    Science.gov (United States)

    Crouzet, Camille; Recham, Nadir; Brunet, Fabrice; Findling, Nathaniel; David, Rénald; Sougrati, Moulay-Tahar

    2016-12-01

    Heterosite FePO4 is synthesized for the first time by direct thermal oxidation of sarcopside Fe3(PO4)2. Both FePO4 and Fe3(PO4)2 have a pseudo olivine structure. Complete isostructural conversion of sarcopside into FePO4 is achieved at a temperature of 450 °C within 3 days according to the reaction Fe3(PO4)2 + ¾ O2 → 2 FePO4 + ½ Fe2O3 which leads to the extraction of iron from the sarcopside structure. Appropriate heating ramp must be applied in order to avoid the crystallization of Fe7(PO4)6. Electrochemical performances of the oxidation product are consistent with those of olivine FePO4.

  15. A ascese da Imagem Poética no encontro Jorge de Lima e Murilo Mendes

    Directory of Open Access Journals (Sweden)

    Luciana Tiscoski

    2010-09-01

    A partir do encontro de Murilo Mendes, Jorge de Lima e Ismael Nery e a conseqüente criação do livro de poemas Tempo e Eternidade, de 1935, após a morte do último, em 1930, os poetas Murilo e Jorge recriam sua voz poética na Restauração da poesia em Cristo. Num crescente questionamento do lugar do poeta na caótica modernidade, bem como na crença deste lugar como de ascese espiritual e recriação da imagem no plano onírico, os poetas aqui analisados nutriram sua trajetória com um surrealismo particular. A afinidade eletiva dos três artistas e sua aproximação com as artes plásticas podem ser apreciadas na linguagem tornada imagem, bem como na imagem tornada linguagem, como é o caso das séries de fotomontagens de Jorge de Lima aqui analisadas. Num procedimento tipicamente surrealista, Jorge de Lima apresenta imagens do inconsciente permeadas de poesia, onde ecoa a filosofia essencialista e visionária do poeta e pintor Ismael Nery, tantas vezes reivindicada por Murilo Mendes. Trata-se da abstração do tempo e do espaço, temas recorrentes em Jorge e Murilo, bem como a errância do homem e os atos do Cristo, a força da matéria e do erotismo, o equilíbrio entre as leis físicas e morais, o essencial, o absoluto e a unidade.

  16. A ascese da Imagem Poética no encontro Jorge de Lima e Murilo Mendes

    Directory of Open Access Journals (Sweden)

    Luciana Tiscoski

    2010-06-01

    Full Text Available A partir do encontro de Murilo Mendes, Jorge de Lima e Ismael Nery e a conseqüente criação do livro de poemas Tempo e Eternidade, de 1935, após a morte do último, em 1930, os poetas Murilo e Jorge recriam sua voz poética na Restauração da poesia em Cristo. Num crescente questionamento do lugar do poeta na caótica modernidade, bem como na crença deste lugar como de ascese espiritual e recriação da imagem no plano onírico, os poetas aqui analisados nutriram sua trajetória com um surrealismo particular. A afinidade eletiva dos três artistas e sua aproximação com as artes plásticas podem ser apreciadas na linguagem tornada imagem, bem como na imagem tornada linguagem, como é o caso das séries de fotomontagens de Jorge de Lima aqui analisadas. Num procedimento tipicamente surrealista, Jorge de Lima apresenta imagens do inconsciente permeadas de poesia, onde ecoa a filosofia essencialista e visionária do poeta e pintor Ismael Nery, tantas vezes reivindicada por Murilo Mendes. Trata-se da abstração do tempo e do espaço, temas recorrentes em Jorge e Murilo, bem como a errância do homem e os atos do Cristo, a força da matéria e do erotismo, o equilíbrio entre as leis físicas e morais, o essencial, o absoluto e a unidade.

  17. Uma teia de palavras: Fontela e sua poética de crise existencial

    Directory of Open Access Journals (Sweden)

    Luciane da Mota Frota

    2013-02-01

    Full Text Available A presença feminina na literatura, a partir do século XX, mostrou-se com um crescimento nítido e definitivo, uma vez que as mulheres escritoras se fizeram muito mais presentes em cena do que no passado. A poesia de Fontela (2008 contraria qualquer expectativa de uma visão agradável ou convencional da vida, pois traduz, em versos breves e rigorosos, as dores humanas. É assim que, refletindo sobre a existência humana, a poeta se faz diferente ao contemplar ao seu redor aquilo que é inefável, bem como a sua própria solidão. Objetivo: Este estudo tem por objetivo analisar os aspectos existenciais e intimistas que permeiam a poesia de Fontela (2008, levando em consideração o tom amargo e seco dos seus versos, porém lírico e simbólico. Metodologia: Trata-se de um estudo de caráter qualitativo com procedimento documental, tendo como instrumento de coleta de dados os poemas dessa autora. Resultados: O que se vê, na poesia de Fontela (2008 é uma tentativa de revelar o seu drama existencial, a sua essência poética, verdadeira e lúcida. Conside rações finais: O entendimento e a compreensão de sua obra só traz um maior enriquecimento para o rol de poetas brasileiras que buscaram imprimir, ainda que sofrendo com os descasos da crítica, o seu potencial artístico de grande significação para a arte no país.

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

    Directory of Open Access Journals (Sweden)

    Xishi Tai

    2012-09-01

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

  19. Frédéric Sylvanise. Langston Hughes, poète jazz, poète blues

    Directory of Open Access Journals (Sweden)

    Hélène CHRISTOL

    2011-03-01

    Full Text Available La Renaissance de Harlem a été redécouverte en France au début du XXIe siècle, grâce à l’organisation de manifestations publiques et universitaires ainsi que la publication de nombreuses études qui « revisitent » la période et les œuvres de ses écrivains et de ses artistes.  L’ouvrage de Frédéric Sylvanise, Langston Hughes, poète jazz, poète blues, publié par les éditions de l’ENS en 2009, apporte sa pierre à cet édifice critique puisqu’il se penche sur certains recueils de poésie de cet écri...

  20. Poétique de l’invective dans les Poèmes aristophanesques de Laurent Tailhade

    Directory of Open Access Journals (Sweden)

    Laurent Robert

    2012-04-01

    Full Text Available Parmi l’abondant corpus traité par Marc Angenot dans La Parole pamphlétaire, les ouvrages de Laurent Tailhade Au Pays du mufle et À travers les Grouins [sic] constituent les seuls recueils poétiques. L’essayiste y voit une illustration du genre de la satire poétique, revivifié dès la fin du xviiie siècle avec les Iambes d’André Chénier, puis au xixe notamment par Auguste Barbier et Victor Hugo. Tailhade pourrait ainsi, superficiellement, être considéré comme le poète satiriste de la Troisième...

  1. Structural and Electrochemical Characterization of Pure LiFePO4 and Nanocomposite C-LiFePO4 Cathodes for Lithium Ion Rechargeable Batteries

    Directory of Open Access Journals (Sweden)

    Arun Kumar

    2009-01-01

    Full Text Available Pure lithium iron phosphate (LiFePO4 and carbon-coated LiFePO4 (C-LiFePO4 cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on LiFePO4 particles. Ex situ Raman spectrum of C-LiFePO4 at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms of LiFePO4 and C-LiFePO4 showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13 mAh/g for C/5, C/3, and C/2, respectively for LiFePO4 where as in case of C-LiFePO4 that were 163, 144, 118, and 70 mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pure LiFePO4 was 69% after 25 cycles where as that of C-LiFePO4 was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating.

  2. Research Update: Retardation and acceleration of phase separation evaluated from observation of imbalance between structure and valence in LiFePO4/FePO4 electrode

    Directory of Open Access Journals (Sweden)

    Kazuya Tokuda

    2014-07-01

    Full Text Available LiFePO4 is a potential positive electrode material for lithium ion batteries. We have experimentally observed an imbalance between the valence change of Fe ions and the structure change from the LiFePO4 phase to the FePO4 phase during delithiation by simultaneous in situ XRD and XANES measurements in an LiFePO4/FePO4 electrode. The ratio of structure change to valence change clearly indicates that the phase separation from LiFePO4 to FePO4 is suppressed at the beginning of delithiation, while it is accelerated at the latter stage, which is due to the coherent strain caused by the lattice misfit between the two phases.

  3. Magnetic relaxation in Zn(PO{sub 3}){sub 2}·Er(PO{sub 3}){sub 3} glass

    Energy Technology Data Exchange (ETDEWEB)

    Orendáč, M. [Institute of Physics, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice (Slovakia); Tibenská, K. [Faculty of Aeronautics, Technical University, Rampová 7, 041 21 Košice (Slovakia); Čižmár, E.; Tkáč, V.; Orendáčová, A. [Institute of Physics, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice (Slovakia); Holubová, J. [University of Pardubice, Faculty of Chemical Technology, Department of General and Inorganic Chemistry, Studentská 573, Pardubice 53210 (Czech Republic); Černošek, Z. [Institute of Physics, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice (Slovakia); Faculty of Aeronautics, Technical University, Rampová 7, 041 21 Košice (Slovakia); University of Pardubice, Faculty of Chemical Technology, Department of General and Inorganic Chemistry, Studentská 573, Pardubice 53210 (Czech Republic); and others

    2016-08-15

    The results of experimental studies of alternating (ac) magnetic susceptibility and specific heat of Zn(PO{sub 3}){sub 2}·Er(PO{sub 3}){sub 3} glass are reported. Despite a high concentration of magnetic Er(III) ions the analysis of ac susceptibility ruled out the formation of a spin glass state in the used range of temperatures. Two relaxation processes were identified. The first one is thermally activated with a crossover in its temperature dependence observed at nominally 7 K. The relaxation at lower temperatures seems to be governed by a direct process with pronounced effect of phonon bottleneck. Striking deceleration of spin dynamics with increasing temperature found above 7 K is tentatively attributed to overcoming Ioffe – Regel crossover and strong scattering of acoustic phonons on local modes. Simplified prediction derived from a soft-mode-dynamics model confirms the presence of the boson peak observed in specific heat data and reasonably predicts the temperature of the crossover. The second process is consistent with a cross – tunneling relaxation. The obtained results suggest that magnetic doping of glasses and studying magnetic relaxation may represent an alternative tool for the investigation of lattice modes in glasses. - Highlights: • The boson peak in Zn(PO{sub 3}){sub 2}·Er(PO{sub 3}){sub 3} glass appears at temperatures, at which localized modes are thermally excited. • The formation of the boson peak is accompanied by anomalous slowing of the magnetic relaxation in Zn(PO{sub 3}){sub 2}·Er(PO{sub 3}){sub 3}.

  4. Neutron diffraction studies of the Na-ion battery electrode materials NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3

    Science.gov (United States)

    Yahia, H. Ben; Essehli, R.; Avdeev, M.; Park, J.-B.; Sun, Y.-K.; Al-Maadeed, M. A.; Belharouak, I.

    2016-06-01

    The new compounds NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3 were synthesized by sol-gel method and their crystal structures were determined by using neutron powder diffraction data. These compounds were characterized by galvanometric cycling and cyclic voltammetry. NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3 crystallize with a stuffed α-CrPO4-type structure. The structure consists of a 3D-framework made of octahedra and tetrahedra that are sharing corners and/or edges generating channels along [100] and [010], in which the sodium atoms are located. Of significance, in the structures of NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3 a statistical disorder Ni2+/Cr3+ was observed on both the 8g and 4a atomic positions, whereas in NaCoCr2(PO4)3 the statistical disorder Co2+/Cr3+ was only observed on the 8g atomic position. When tested as negative electrode materials, NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3 delivered specific capacities of 352, 385, and 368 mA h g-1, respectively, which attests to the electrochemical activity of sodium in these compounds.

  5. A advertência poética de Hilda Hilst em As aves da noite

    OpenAIRE

    Cunha,Rubens da

    2017-01-01

    resumo Entre 1967 e 1969, Hilda Hilst escreveu oito peças de teatro, entre elas, As aves da noite, que relata os últimos momentos de seis prisioneiros na cela da fome, num campo nazista. Neste artigo, analisamos As aves da noite como uma peça de advertência sobre o terror imposto por qualquer estado totalitário, não apenas o nazista. A análise foi fundamentada, entre outros, por Alain Badiou, para quem o século XX não cumpriu a promessa da modernidade e a vida só cumpriu seu destino e seu des...

  6. A advertência poética de Hilda Hilst em As aves da noite

    OpenAIRE

    Cunha, Rubens da

    2017-01-01

    Entre 1967 e 1969, Hilda Hilst escreveu oito peças de teatro, entre elas, As aves da noite, que relata os últimos momentos de seis prisioneiros na cela da fome, num campo nazista. Neste artigo, analisamos As aves da noite como uma peça de advertência sobre o terror imposto por qualquer estado totalitário, não apenas o nazista. A análise foi fundamentada, entre outros, por Alain Badiou, para quem o século XX não cumpriu a promessa da modernidade e a vida só cumpriu seu destino e seu desígnio p...

  7. Wezwałem cię po numerze. 172364, 119198, 132434 i inni

    Directory of Open Access Journals (Sweden)

    Joanna Roszak

    2012-01-01

    Full Text Available The title “I have called you by your number” is paraphrased from the book of Isaiah. In Torah the change of name of the main character suggests the turning point of his/her fate. In the article I concentrate on the gesture of assuming pseudonym-anagrams by a few poets – it is viable to read it as an attempt at self-determination, and as a painful dividing line, and as a form of a mask, and an analogue of a perturbed fate. My reflection concentrates on texts by Sachs, Domin, Celan, Amichai, Améry with a motif of numbers (the turned over analogues of the names – I find a context in the poem by Wisława Szymborska Still; and in the performance by Raimund Hoghe, staged only once, just in Poland, entitled site specific; the project 80064 by Artur Żmijewski or works by Roman Opałka. The promise written in the Book of Isaiah of liberating Israel, which was supposed to be a work of God’s omnipotence, God talking to Jacob – who is an allegory of Israel: “Don’t be afraid, for I have redeemed you; I have called you by your name, you are mine. When you pass through the waters, I will be with you; and through the rivers, they shall not overflow you: when you walk through the fire, you shall not be burned, neither shall the flame kindle on you. For I am Yahweh your God”, in Auschwitz turned into the antithesis, and hence a threat that has a completely different sender than a good father: Be afraid, or else nobody will redeem you. I am calling you by the number, you are no one’s. You will go to the fire and a flame will consume you. You are alone.

  8. Po kanalu TBTs pokazhut film o "Vaffen-SS"

    Index Scriptorium Estoniae

    2006-01-01

    Vene filmistuudio Treti Rim on tootnud lätivastase ajaloolise dokumentaali-propagandafilmi Teisest Maailmasõjast "Natslus Balti moodi" ("Natsizm po pribaltiski"). Filmi näitab täna Vene telekanal TVT, andes siiski võimaluse eetris esineda Läti Venemaa suursaadikule Andris Teikmanisele

  9. SrMnII2MnIII(PO43

    Directory of Open Access Journals (Sweden)

    Ghaleb Alhakmi

    2013-09-01

    Full Text Available The title compound, strontium trimanganese tris(orthophosphate, was synthesized under hydrothermal conditions. Its structure is isotypic to that of the lead analogue PbMnII2MnIII(PO43. Two O atoms are in general positions, whereas all others atoms are in special positions. The Sr and one P atom exhibit mm2 symmetry, the MnII atom 2/m symmetry, the MnIII atom and the other P atom .2. symmetry and two O atoms are located on mirror planes. The three-dimensional network of the crystal structure is made up of two types of chains running parallel to [010]. One chain is linear and is composed of alternating MnIIIO6 octahedra and PO4 tetrahedra sharing vertices; the other chain has a zigzag arrangement and is built up from two edge-sharing MnIIO6 octahedra connected to PO4 tetrahedra by edges and vertices. The two types of chains are linked through PO4 tetrahedra, leading to the formation of channels parallel to [100] and [010] in which the SrII ions are located. They are surrounded by eight O atoms in the form of a slightly distorted bicapped trigonal prism.

  10. PO.EX: Arquivo, Subarquivo, Meta-arquivo

    Directory of Open Access Journals (Sweden)

    Marques, Diogo

    2015-10-01

    Full Text Available Review of Rui TORRES & Sandy BALDWIN, PO.EX: Essays from Portugal on Cyberliterature and Intermedia (By Pedro Barbosa, Ana Hatherly and E. M. de Melo e Castro. Morgantown, WV: Center for Literary Computing, 2014, 282 pp. ISBN 978-1-938228-74-2

  11. Magnetic structure and magnetocalorics of GdPO4

    NARCIS (Netherlands)

    Palacios, E.; Rodriguez-Velamazan, J.A.; Evangelisti, M.; McIntyre, G.J.; Lorusso, G.; Visser, D.; De Jongh, L.J.; Boatner, L.A.

    2014-01-01

    The magnetic ordering structure of GdPO4 is determined at T=60 mK by the diffraction of hot neutrons with wavelength λ=0.4696 Å. It corresponds to a noncollinear antiferromagnetic arrangement of the Gd moments with propagation vector k=(1/2,0,1/2). This arrangement is found to minimize the dipole-di

  12. PoGOLite measurement of Crab polarisation and future plans

    Science.gov (United States)

    Pearce, Mark

    2016-07-01

    (For the PoGOLite Collaboration) The PoGOLite Pathfinder is a balloon-borne hard X-ray polarimeter designed for the observation of bright, ~1 Crab, sources. Polarisation is determined by measuring the azimuthal Compton scattering angle of incident X-rays in an array of plastic scintillators housed in an BGO anticoincidence well. The PoGOLite Pathfinder was launched from the SSC Esrange Space Centre in July 2013 resulting in a near-circumpolar flight of two weeks duration. The linear polarisation of hard X-ray emissions from the Crab was measured in a previously unexplored energy interval, 20-120 keV. The polarimetric response was characterised prior to flight using both polarised and unpolarised calibration sources. Systematic effects were addressed through observations of a background field. An upgraded polarimeter, PoGO+, is scheduled to fly in summer 2016 from Esrange. Results from the 2013 Pathfinder flight and prospects for the 2016 flight will be discussed.

  13. Recoil-deposited Po-210 in radon dwellings

    Energy Technology Data Exchange (ETDEWEB)

    Samuelsson, C.

    1990-12-31

    Short-lived decay products of Rn-222 plate out on all surfaces in a house containing radon gas. Following the subsequent alpha decays of the mother nuclei, the daughter products Pb-214 and Pb-210 are superficially and permanently absorbed. Due to its long half-life (22 y) the activity of absorbed Pb-210 accumulates in the surface. The activity of Pb-210, or its decay products, can thus reflect the past randon daughter and plate-out history of a house over several decades. Our results and experience from measurements of Po-210 and Rn-222 in 22 dwellings will be presented. In these studies the Po-210 surface activity of one plane glass sheet per dwelling (window panes were not used) has been determined and compared with the period of exposure times the mean radon concentration measured over a two-month period. Considering the large uncertainty in the integrated radon exposure estimate the surface {sup 210}Po correlates well (r=0.73) with the accumulated radon exposure. The {sup 210}Po activity of the glass samples has been measured non-destructively using an open-flow pulse ionization chamber and this detector has also been successfully applied in field exercises.

  14. Recoil-deposited Po-210 in radon dwellings

    Energy Technology Data Exchange (ETDEWEB)

    Samuelsson, C.

    1990-01-01

    Short-lived decay products of Rn-222 plate out on all surfaces in a house containing radon gas. Following the subsequent alpha decays of the mother nuclei, the daughter products Pb-214 and Pb-210 are superficially and permanently absorbed. Due to its long half-life (22 y) the activity of absorbed Pb-210 accumulates in the surface. The activity of Pb-210, or its decay products, can thus reflect the past randon daughter and plate-out history of a house over several decades. Our results and experience from measurements of Po-210 and Rn-222 in 22 dwellings will be presented. In these studies the Po-210 surface activity of one plane glass sheet per dwelling (window panes were not used) has been determined and compared with the period of exposure times the mean radon concentration measured over a two-month period. Considering the large uncertainty in the integrated radon exposure estimate the surface {sup 210}Po correlates well (r=0.73) with the accumulated radon exposure. The {sup 210}Po activity of the glass samples has been measured non-destructively using an open-flow pulse ionization chamber and this detector has also been successfully applied in field exercises.

  15. Bioaccumulation of polonium 210Po in marine birds.

    Science.gov (United States)

    Skwarzec, B; Fabisiak, J

    2007-01-01

    The aim of this work was to determine the 210Po content in marine birds which permanently or temporally live in the Polish part of the Baltic Sea. We chose 11 species of sea birds: three species permanently residing at southern Baltic Sea, four species of wintering birds and three species of migrating birds. The results show that the polonium is non-uniformly distributed in the marine birds. The highest activities of 210Po were observed in feathers, muscles and liver and the lowest in skin and skeleton. Species of birds that eat crustaceans, molluscs, fish and plants (long-tailed duck Clangula hyemalis, white-winged scoter Melanitta fusca) accumulated more polonium than species that eat mainly fish (great cormorant Phalacrocorax carbo, common guillemot Uria aalge) or plants (tufted duck Aythya fuligula). Moreover, about 63% of the 210Po that was located in feathers of razorbil (Alca torda) and long-tailed duck (C. hyemalis) was apparently adsorbed, suggesting an external source such as the air. It means that the adsorption of 210Po on the feather surface may be an important transfer from air to water.

  16. Polonium 210Po in cigarettes produced in Poland.

    Science.gov (United States)

    Skwarzec, B; Strumińska, D I; Borylo, A; Ulatowski, J

    2001-01-01

    This paper discusses the results of 210Po determinations in the fourteen most frequently smoked brands of cigarettes, which constitute over 80% of total cigarette consumption in Poland. The 210Po activity in the cigarette samples analysed (tobacco, ash, filter before and after smoking) were measured using alpha spectrometry (Canberra-Packard). The data indicates that there is considerable variation in the polonium content of these brands. The highest 210Po content per sample was found in the cheap "Popularne" brand (24.12 mBq), the lowest in "Caro" (4.23 mBq). There was also a large difference between the polonium remaining in the ash in comparison with its total content in the tobacco in all the brands (from 4.3% for "Golden American" to 71.0% for "Sobieski King-Size"). The analysis has demonstrated that filters absorbed only a small amount of the polonium contained in the tobacco. "Caro" cigarettes have the most efficient filter, retaining 25.1% of the polonium contained in the tobacco, but most filters absorbed only 0.1-7.2% of polonium. The daily inhalation of 210Po by Polish smokers who get through one pack per day ranges from 20 to 215 mBq, but people smoking two or more packs of "Popularne" brand will inhale over 430 mBq of polonium per day.

  17. 49 CFR 604.36 - Powers of a PO.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false Powers of a PO. 604.36 Section 604.36 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL TRANSIT ADMINISTRATION... witnesses; and (k) Make findings of fact and conclusions of law and issue a recommended decision....

  18. Bioaccumulation of polonium {sup 210}Po in marine birds

    Energy Technology Data Exchange (ETDEWEB)

    Skwarzec, B. [University of Gdansk, Faculty of Chemistry, Chair of Analytical Chemistry, ul. Sobieskiego 18/19, 80-952 Gdansk (Poland)]. E-mail: bosk@chemik.chem.univ.gda.pl; Fabisiak, J. [Naval Academy, Smidowicza 61, 81-103 Gdynia (Poland)

    2007-07-01

    The aim of this work was to determine the {sup 210}Po content in marine birds which permanently or temporally live in the Polish part of the Baltic Sea. We chose 11 species of sea birds: three species permanently residing at southern Baltic Sea, four species of wintering birds and three species of migrating birds. The results show that the polonium is non-uniformly distributed in the marine birds. The highest activities of {sup 210}Po were observed in feathers, muscles and liver and the lowest in skin and skeleton. Species of birds that eat crustaceans, molluscs, fish and plants (long-tailed duck Clangula hyemalis, white-winged scoter Melanitta fusca) accumulated more polonium than species that eat mainly fish (great cormorant Phalacrocorax carbo, common guillemot Uria aalge) or plants (tufted duck Aythya fuligula). Moreover, about 63% of the {sup 210}Po that was located in feathers of razorbil (Alca torda) and long-tailed duck (C. hyemalis) was apparently adsorbed, suggesting an external source such as the air. It means that the adsorption of {sup 210}Po on the feather surface may be an important transfer from air to water.

  19. Development of a Portable Motor Learning Laboratory (PoMLab.

    Directory of Open Access Journals (Sweden)

    Ken Takiyama

    Full Text Available Most motor learning experiments have been conducted in a laboratory setting. In this type of setting, a huge and expensive manipulandum is frequently used, requiring a large budget and wide open space. Subjects also need to travel to the laboratory, which is a burden for them. This burden is particularly severe for patients with neurological disorders. Here, we describe the development of a novel application based on Unity3D and smart devices, e.g., smartphones or tablet devices, that can be used to conduct motor learning experiments at any time and in any place, without requiring a large budget and wide open space and without the burden of travel on subjects. We refer to our application as POrtable Motor learning LABoratory, or PoMLab. PoMLab is a multiplatform application that is available and sharable for free. We investigated whether PoMLab could be an alternative to the laboratory setting using a visuomotor rotation paradigm that causes sensory prediction error, enabling the investigation of how subjects minimize the error. In the first experiment, subjects could adapt to a constant visuomotor rotation that was abruptly applied at a specific trial. The learning curve for the first experiment could be modeled well using a state space model, a mathematical model that describes the motor leaning process. In the second experiment, subjects could adapt to a visuomotor rotation that gradually increased each trial. The subjects adapted to the gradually increasing visuomotor rotation without being aware of the visuomotor rotation. These experimental results have been reported for conventional experiments conducted in a laboratory setting, and our PoMLab application could reproduce these results. PoMLab can thus be considered an alternative to the laboratory setting. We also conducted follow-up experiments in university physical education classes. A state space model that was fit to the data obtained in the laboratory experiments could predict the

  20. Development of a Portable Motor Learning Laboratory (PoMLab).

    Science.gov (United States)

    Takiyama, Ken; Shinya, Masahiro

    2016-01-01

    Most motor learning experiments have been conducted in a laboratory setting. In this type of setting, a huge and expensive manipulandum is frequently used, requiring a large budget and wide open space. Subjects also need to travel to the laboratory, which is a burden for them. This burden is particularly severe for patients with neurological disorders. Here, we describe the development of a novel application based on Unity3D and smart devices, e.g., smartphones or tablet devices, that can be used to conduct motor learning experiments at any time and in any place, without requiring a large budget and wide open space and without the burden of travel on subjects. We refer to our application as POrtable Motor learning LABoratory, or PoMLab. PoMLab is a multiplatform application that is available and sharable for free. We investigated whether PoMLab could be an alternative to the laboratory setting using a visuomotor rotation paradigm that causes sensory prediction error, enabling the investigation of how subjects minimize the error. In the first experiment, subjects could adapt to a constant visuomotor rotation that was abruptly applied at a specific trial. The learning curve for the first experiment could be modeled well using a state space model, a mathematical model that describes the motor leaning process. In the second experiment, subjects could adapt to a visuomotor rotation that gradually increased each trial. The subjects adapted to the gradually increasing visuomotor rotation without being aware of the visuomotor rotation. These experimental results have been reported for conventional experiments conducted in a laboratory setting, and our PoMLab application could reproduce these results. PoMLab can thus be considered an alternative to the laboratory setting. We also conducted follow-up experiments in university physical education classes. A state space model that was fit to the data obtained in the laboratory experiments could predict the learning curves

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

    Directory of Open Access Journals (Sweden)

    Hai-Xue Kuang

    2012-05-01

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

  2. Efeito mutagênico da água natural (poço, rios Ficha e Minas Gerais, próximos à cidade de Ubiratã, Estado do Paraná, Brasil em sistema teste animal - DOI: 10.4025/actascibiolsci.v26i1.1665 Mutagenic effect of fresh water (well, rivers Ficha and Minas Gerais, close to the town of Ubiratã, Paraná, Brazil in the animal test system - DOI: 10.4025/actascibiolsci.v26i1.1665

    Directory of Open Access Journals (Sweden)

    Veronica Elisa Pimenta Vicentini

    2004-04-01

    Full Text Available O intenso desenvolvimento industrial e crescimento populacional têm promovido alterações na qualidade da água, sendo esta fonte de muitos estudos para análise desses efeitos no ser humano. Devido a contaminação dos rios por agrotóxicos, herbicidas, pesticidas e demais aditivos químicos utilizados nas lavouras, e pelas indústrias que despejam através de esgotos, resíduos de sua produção, que não são devidamente tratados, torna-se importante a investigação da atividade citotóxica e mutagênica da água dos rios. Neste estudo foi utilizado como sistema teste animal as células da medula óssea de ratos Wistar (,em>Rattus norvegicus, tratados in vivo, via gavagem, de forma subcrônica (7 dias, para investigação dos efeitos das águas do poço, e dos rios Ficha e Minas Gerais, próximos à Ubiratã, Estado do Paraná, Brasil, analisando-se o ciclo de divisão celular e os cromossomos metafásicos. A análise estatística demonstrou que as águas não alteraram o ciclo de divisão celular dos ratos Wistar e também não provocaram aumento no número de aberrações cromossômicas, mostrando não terem neste tratamento, efeito citotóxico e nem clastogênicoIntense industrial development and population growth have been altering the quality of water and innumerous studies have been undertaken to analyze their effects on humans. Due to rivers contamination with agrotoxics, herbicides, pesticides, excess of farming chemical additives and through sewers spilling not properly treated industrial waste, investigating cytotoxic and mutagenic activity of river water becomes all-important. Bone marrow cells of Wistar rats (Rattus norvegicus, treated in vivo, through gavage, in subchronic treatment (7 days, were used as experimental animal test system to investigate the effects of well water and water from the rivers Ficha and Minas Gerais, close to the municipality of Ubiratã, State of Paraná, southern Brazil. Cell division index and

  3. NASA's Planetary Science E/PO Forum: Reflections on Five Years of Effort to Support an E/PO Community

    Science.gov (United States)

    Shipp, S. S.; Shebby, S.; Buxner, S.; Boonstra, D.; Cobabe-Ammann, E. A.; Cobb, W. H.; Dalton, H.; Grier, J.; Klug Boonstra, S. L.; LaConte, K.; Ristvey, J.; Shupla, C. B.; Weeks, S.; Wessen, A. S.; Zimmerman-Brachman, R.

    2014-12-01

    Over the past decade, NASA's Science Mission Directorate (SMD) has funded four education and public outreach (E/PO) forums, aligned with each of its science divisions, including Astrophysics, Earth Science, Heliophysics, and Planetary Science. Together, these forums help organize individual division E/PO programs into a coordinated, effective, efficient, nationwide effort that shares the scientific discoveries of NASA across a broad array of audiences. In the past four-and-a-half years, the Planetary Science Division's Forum - in collaboration with the other three Forums - has worked to support its community of education professionals and scientists involved in E/PO to communicate, collaborate, and strengthen their efforts. The Forum's work encompasses identification of best practices based on educational research, increasing understanding of needs through audience-based working groups, the development of strategic collaborations and partnerships to increase programmatic reach, and the creation of strategic resources to support community members in their E/PO work (e.g., an online workspace for the community to communicate, collaborate, and share practices; recommendations to scientists for increasing impact in educational settings; a one-stop shop for NASA SMD classroom and informal education products, http://nasawavelength.org). Drawing on evaluation data, the presentation will explore what resources and support mechanisms are valued by the community, ways the community uses the available resources, and the outcomes of the effort to date.

  4. A synthesis of LiFePO{sub 4} starting from FePO{sub 4} under reducing atmosphere

    Energy Technology Data Exchange (ETDEWEB)

    Prosini, Pier Paolo [ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, 00123 Santa Maria di Galeria, Rome, Italy and DInESto, Drive the Innovation in Energy Storage, Via Provin (Italy); Cento, Cinzia; Masci, Amedeo; Carewska, Maria; Gislon, Paola [ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, 00123 Santa Maria di Galeria, Rome (Italy)

    2014-06-19

    A fast and easy way to produce LiFePO{sub 4} starting from FePO{sub 4}, used as iron and phosphorus source, is proposed. 5% hydrogen is employed as a reducing agent and various compounds containing lithium as lithiation agents. The selected lithiation agents included: LiCl, CH{sub 3}COOLi, LiOH, Li{sub 2}S, LiH, and Li{sub 2}CO{sub 3}. Solid state synthesis is used for the LiFePO{sub 4} preparation and the so obtained materials are structurally characterized by XRD. The materials are used to fabricate composite electrode and their specific capacity is evaluated by low rate galvanostatic charge/discharge cycles (C/10 rate). Among the various lithium salts, the acetate give rise to the LiFePO{sub 4} with the best electrochemical performance. The morphology of this material is further investigated by SEM microscopy and the specific capacity is evaluated as a function of the discharge rate and the cycle number.

  5. Stability of luminescence in LaPO4, LaPO4 :RE(3+) (RE = Dy, Eu) nanophosphors.

    Science.gov (United States)

    Pimpalshende, D M; Dhoble, S J

    2015-03-01

    The property of high refractive index, low solubility in water as well as stability to high temperature variation of lanthanum phosphate (LaPO4 ) proved it was the most effective candidate for the production of display lamps, and plasma display panel devices and sensors. The morphological and nanostructural characteristics play a key role in the working efficiency of the luminescent material. These properties can be controlled by the synthesis method, which we have adopted in this paper. We have prepared LaPO4 nanoparticles at a relatively low temperature (110 ºC) in polyethylene glycol medium by using a wet chemical one-step synthesis. The phase composition and structural properties of the sample have been characterized by X-ray diffraction, Fourier transform infrared, transmission electron microscopy and the luminescent property by photoluminescence and thermoluminescence. The samples were well crystallized and the average crystallite size of 15 nm has been calculated for pure LaPO4 using the Debye-Scherrer equation. The result from heat-treated samples shows the phase combination and morphological structure of the powder depend on the annealing temperature. The heat treatment changes the structure of LaPO4 from cuboid rods to fine grains at about 600 °C. The emission spectrum of LaPO4 shows the broad emission band at 368 nm and shoulder at 465 nm with emission of blue color when monitored at an excitation wavelength at 256 nm. The stability of phosphor has been studied with respect to humidity, temperature, doping, doping concentration, γ-ray exposures, etc. The prepared nanosized phosphors were thermally stable and may be a promising blue phosphor for lighting technology as well as radiation dosimetry.

  6. An EXAFS study of the luminescent Bi3+ center in LaPO4---Bi

    NARCIS (Netherlands)

    Zon, F.B.M. van; Koningsberger, D.C.; Oomen, E.W.J.L.; Blasse, G.

    1987-01-01

    In order to determine the oxygen coordination of the Bi3+ ion in LaPO4---Bi, extended X-ray absorption fine structure (EXAFS) spectra were measured of BiPO4 and LaPO4---Bi. Analysis of the EXAFS data shows that the Bi3+ ion in LaPO4---Bi occupies the La3+ site, but that the oxygen coordination of th

  7. Remoção biológica de fósforo em reatores em bateladas sequenciais com diferentes tempos de retenção de sólidos Biological phosphorus removal in sequencing batch reactors with different solid retention times

    Directory of Open Access Journals (Sweden)

    Israel Nunes Henrique

    2010-06-01

    Full Text Available Nos últimos anos, tem surgido a necessidade de se projetarem sistemas de tratamento de águas residuárias que, além de remover carga orgânica, sejam capazes de remover nutrientes, particularmente nitrogênio e fósforo. Este trabalho avaliou a remoção biológica de fósforo em sistemas de lodo ativado, tratando esgoto doméstico por meio de reatores em bateladas sequenciais (RBS, monitorado com diferentes tempos de retenção celular (TRC: 20, 5 e 3 dias. Esses experimentos foram avaliados em escala de bancada com o uso da respirometria, utilizando-se acetato como fonte de carbono orgânico. Os resultados mostraram satisfatória remoção de fósforo total nos três experimentos, com valores médios entre 79 a 82%, sendo que o sistema RBS que operou com TRC de cinco dias obteve resultados melhores.In recent years, there has been an increasing need to design wastewater treatment systems that are capable of removing both organic material and nutrients, notably nitrogen and phosphorus. This study evaluated biological phosphorus removal by activated sludge systems fed with domestic sewage and operating as sequencing batch reactors (SBR with different solids retention times (SRT namely 20, 5 and 3 days. This was supported by respirometry experiments at bench scale using acetate as the source of organic carbon. The results showed satisfactory total phosphorus removal efficiencies mean values between 79-82% for the three regimes with the best removal efficiency occurring in the SBR operating with a five-day SRT.

  8. A Hybrid PO - Higher-Order Hierarchical MoM Formulation using Curvilinear Geometry Modeling

    DEFF Research Database (Denmark)

    Jørgensen, E.; Meincke, Peter; Breinbjerg, Olav

    2003-01-01

    A very efficient hybrid PO-MoM method has been presented. In contrast to existing methods, the present solution employs higher-order hierarchical basis functions to discretize the MoM and PO currents. This allows to reduce the number of basis functions in both the PO and MoM regions considerably...

  9. Three New Myrsinol Diterpenes from <em>Euphorbia proliferaem> and Their Neuroprotective Activities

    Directory of Open Access Journals (Sweden)

    Yuanqiang Guo

    2012-08-01

    Full Text Available Three new myrsinol diterpenes were isolated from the roots of<em> em>>Euphorbia proliferaem>. Their structures were elucidated as 2<em>α-O>-isobutyryl-3<em>β>,5<em>α>,7<em>β>,10,15<em>β-penta-O>-acetyl-14<em>α-O>-benzoyl-10,18-dihydromyrsinol (1, 2<em>α-O>-isobutyryl-3<em>β-O>-propion-yl-5<em>α>,7<em>β>,10,15<em>β-tetra-O>-acetyl-10,18-dihydromyrsinol (2, and 2<em>α>,14<em>α-di-O>-benzoyl-3<em>β>,5<em>α>,7<em>β>,10,15<em>β-penta-O>-acetyl-10,18-dihydromyrsinol (3 on the basis of spectroscopic data analyses (IR, ESI-MS, HR-ESI-MS, and 1D and 2D NMR. Their neuroprotective activities were evaluated and compounds 1 and 2 showed neuroprotective effects against MPP+-induced neuronal cell death in SH-SY5Y cells.

  10. Infância e poesia em Emílio Moura

    Directory of Open Access Journals (Sweden)

    Luciano Marcos Dias Cavalcanti

    2016-09-01

    Full Text Available Pretendemos apresentar neste pequeno estudo uma investigação de como se dá, na poética de Emílio Moura, a presença da infância, e como o poeta se utiliza do mundo infantil para construir seus poemas, seja no que diz respeito à infância vista como um mundo bom e sem problemas, seja como elemento memorialístico em que o poeta busca no passado não somente uma lembrança lúdica, mas também um processo criativo utilizado para a criação literária.

  11. A provocação poética dos elementos materiais: novas categorias de análise na abordagem sócio-poética

    Directory of Open Access Journals (Sweden)

    Cláudia Tavares

    1999-06-01

    Full Text Available Gauthier, Santos (1996 descrevem a sócio-poética como uma abordagem no conhecimento do ser humano e da sociedade, um caminho para a produção do conhecimento, que por meio de práticas diferenciadas de pesquisa e do educar mutual transforma poeticamente o saber para melhor conhecer. Os idealizadores da sócio-poética utilizam os lugares sócio-míticos, como categorias de produção e análise dos dados. Mas estimulam aqueles que trabalham com esta abordagem, a criarem novas técnicas e vivências, que facilitem a produção de dados no grupo pesquisador. Atendendo a este desafio e inspiradas no conceito de Imaginação Material de Gaston Bachelard, na Técnica da Imaginação Ativa de C.G.Jung e nos experimentos de crescimento da gestalt-terapia de John Stevens, criamos novas técnicas e categorias de estudo na abordagem sócio-poética denominando-as de Técnica dos Elementos Materiais. Como os primeiros filósofos gregos, acreditamos que muito das imagens que produzimos provêm da provocação dos 4 elementos materiais (água, terra, fogo e ar. A pesquisa foi desenvolvida com diferentes grupos de enfermeiras, professoras de enfermagem, pós-graduandas em enfermagem e equipe de enfermagem de um hospital psiquiátrico. Evidenciou-se que a Técnica dos Elementos Materiais favorece a expressão de conteúdos inconscientes ou silenciados que interferem no cuidado de enfermagem, possibilitando à enfermeira explorar criativamente a si mesma, para inovar sua prática profissional.

  12. PoInTree: A Polar and Interactive Phylogenetic Tree

    Institute of Scientific and Technical Information of China (English)

    Carreras Marco; Gianti Eleonora; Sartori Luca; Plyte Simon Edward; Isacchi Antonella; Bosotti Roberta

    2005-01-01

    PoInTree (Polar and Innteractive Tree) is an application that allows to build, visualize, and customize phylogenetic trees in a polar, interactive, and highly flexible view. It takes as input a FASTA file or multiple alignment formats. Phylogenetic tree calculation is based on a sequence distance method and utilizes the Neighbor Joining (NJ) algorithm. It also allows displaying precalculated trees of the major protein families based on Pfam classification. In PoInTree, nodes can be dynamically opened and closed and distances between genes are graphically represented.Tree root can be centered on a selected leaf. Text search mechanism, color-coding and labeling display are integrated. The visualizer can be connected to an Oracle database containing information on sequences and other biological data, helping to guide their interpretation within a given protein family across multiple species.The application is written in Borland Delphi and based on VCL Teechart Pro 6 graphical component (Steema software).

  13. Electric charge spectrum of recoiling {sup 218}Po

    Energy Technology Data Exchange (ETDEWEB)

    Abou-Khalil, R. [Institut de Radioprotection et de Surete Nucleaire (IRSN)/Service d' Etudes et de Recherches en Aerodispersion des polluants et en Confinement, B.P 68, 91192 Gif-sur-Yvette Cedex (France); Departement de Recherches Subatomiques, Institut Pluridisciplinaire Hubert-Curien, Groupe de Radioprotection et Mesures Environnementales (RaMsEs), Universite Louis Pasteur Strasbourg I, BP 28, 67037 Strasbourg Cedex 2 (France); Michielsen, N., E-mail: nathalie.michielsen@irsn.f [Institut de Radioprotection et de Surete Nucleaire (IRSN)/Service d' Etudes et de Recherches en Aerodispersion des polluants et en Confinement, B.P 68, 91192 Gif-sur-Yvette Cedex (France); Della-Negra, S. [Institut de Physique Nucleaire (IPN), F-91406 Orsay (France); Nourreddine, A.; Baussan, E. [Departement de Recherches Subatomiques, Institut Pluridisciplinaire Hubert-Curien, Groupe de Radioprotection et Mesures Environnementales (RaMsEs), Universite Louis Pasteur Strasbourg I, BP 28, 67037 Strasbourg Cedex 2 (France)

    2009-10-15

    The chemical and physical properties of a radioactive nanometric aerosol are important in determining its behaviour in indoor atmospheres and play a major part in determining its potential health effects. In a well defined experimental system, mass spectrometry coupled to the Time-of-Flight technique, we measured the electric charge of {sup 218}Po at the end of its recoil path. The charge distribution of the recoiling {sup 218}Po is mainly neutral and singly charged with a very small multicharged fraction. In case of radon progeny embedded in solid matter this one can play a major role in the surface ionisation processes versus electron and ion emission induced by the passage of the alpha recoils through the surface.

  14. počet potrubní trasy parovodu

    OpenAIRE

    Majer, Jan

    2016-01-01

    Práce objasňuje problematiku návrhového a kontrolního výpočtu parovodní potrubní trasy. K provedení analýzy jsou využity dva výpočtové programy – AutoPIPE a Ansys. V programu AutoPIPE je u potrubní trasy řešena problematika vhodného uložení a teplotní dilatace. Výsledky pevnostní analýzy z obou programů jsou vyhodnoceny dle normy ČSN EN 13480. This thesis describes issues related to design and structural analysis of steam pipeline. Analysis are done by using two different software program ...

  15. High pressure structural phase transitions of PbPo

    Energy Technology Data Exchange (ETDEWEB)

    Bencherif, Y.; Boukra, A. [Departement de Physique, Faculte des Sciences, Universite de Mostaganem (Algeria); Departement de Physique, Universite des Sciences et de la Technologie d' Oran, USTO, Oran (Algeria); Zaoui, A., E-mail: azaoui@polytech-lille.fr [Universite Lille Nord de France, LGCgE (EA 4515) Lille1, Polytech' Lille, Cite Scientifique, Avenue Paul Langevin, 59655 Villeneuve D' Ascq Cedex (France); Ferhat, M. [Departement de Physique, Universite des Sciences et de la Technologie d' Oran, USTO, Oran (Algeria)

    2012-09-01

    First-principles calculations have been performed to investigate the high pressure phase transitions and dynamical properties of the less known lead polonium compound. The calculated ground state parameters for the NaCl phase show good agreement with the experimental data. The obtained results show that the intermediate phase transition for this compound is the orthorhombic Pnma phase. The PbPo undergoes from the rocksalt to Pnma phase at 4.20 GPa. Further structural phase transition from intermediate to CsCl phase has been found at 8.5 GPa. In addition, phonon dispersion spectra were derived from linear-response to density functional theory. In particular, we show that the dynamical properties of PbPo exhibit some peculiar features compared to other III-V compounds. Finally, thermodynamics properties have been also addressed from quasiharmonic approximation.

  16. La trayectoria poética de Adolfo Alonso Ares

    Directory of Open Access Journals (Sweden)

    Armando López Castro

    2010-03-01

    Full Text Available Los poemas de Adolfo Ares revelan una voz de lo natural, una resonancia de un mismo ritmo cósmico que articula tosa su escritura. Desde el punto de vista lingüístico, se puede decir que la cercanía del poeta a la lengua hablada, sin la cual no hay renovación posible, le permite crear un lenguaje dinámico, en continua transformación, con el cual cada experiencia poética adquiere un sentido nuevo. Tal ha sido la función del arte desde los tiempos más antiguos: integrar al hombre en el ritmo del universo, que a su vez ha de animar a la obra poética en su conjunto.

  17. Baseline concentration of Polonium-210 ((210)Po) in tuna fish.

    Science.gov (United States)

    Khan, M Feroz; Wesley, S Godwin

    2016-06-15

    Several species of tuna fish were analyzed for (210)Po content in their edible muscle tissues. This study was carried out as a part of baseline data generation around a large nuclear power plant situated at Kudankulam, southeast coast of India. The concentration of (210)Po in the muscle tissue ranged from 40.9±5.2 to 92.5±7.9Bq/kg of fresh fish, and the highest activity was recorded for the tuna Euthynnus affinis and the lowest for Auxis thazard. The committed effective dose to the local residents was calculated to be 62.7-141.8μSvyear(-1). Copyright © 2016 Elsevier Ltd. All rights reserved.

  18. A poesia inglesa e a retórica aristotélica: a atualidade dos discursos poéticos e preceptivos no século XVI

    Directory of Open Access Journals (Sweden)

    Lavinia Silvares Fiorussi

    2009-07-01

    Full Text Available Este artigo trata da produção discursiva sobre o regramento da poesia divulgada na Inglaterra, entre a segunda metade do século XVI e a primeira metade do século XVII, pressupondo a vigência da retórica aristotélica como doutrina organizadora do pensamento e das artes. Assumindo uma abordagem teórica não-reflexológica, este artigo considera que os tratados de retórica e de poética em questão têm seu próprio valor como artefatos da linguagem, constituindo, ao mesmo tempo, peças divulgadoras dos preceitos e das qualidades impostas ao fazer poético e, também, produtos do mesmo meio histórico e social em que se realiza a poesia.

  19. Configuration Interaction calculations of positron binding to Be(3Po)

    CERN Document Server

    Bromley, M W J

    2006-01-01

    The Configuration Interaction method is applied to investigate the possibility of positron binding to the metastable beryllium (1s^22s2p 3Po) state. The largest calculation obtained an estimated energy that was unstable by 0.00014 Hartree with respect to the Ps + Be^+(2s) lowest dissociation channel. It is likely that positron binding to parent states with non-zero angular momentum is inhibited by centrifugal barriers.

  20. Lattice dynamics of LuPO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Nipko, J.C. [Argonne National Lab., IL (United States)]|[Colorado State Univ., Fort Collins, CO (United States); Loong, C.-K. [Argonne National Lab., IL (United States); Loewenhaupt, M. [Technische Univ. Dresden (Germany); Reichardt, W.; Braden, M. [Forschungszentrum Karlsruhe GmbH Technik und Umwelt (Germany); Boatner, L.A. [Oak Ridge National Lab., TN (United States)

    1996-06-01

    Lutetium orthophosphate is an important nonmagnetic host material for rare-earth-activated luminescence applications. We have measured the LuPO{sub 4} phonon density of states and dispersion curves along the [{xi}00],[{xi}{xi}0], and [00{xi}] symmetry directions by neutron spectroscopy using polycrystalline and single-crystal samples. A quantitative analysis of the neutron results was carried out using a lattice-dynamical shell model.

  1. Graphs for Isotopes of 84-Po(Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides a graphic representation of nucleon separation energies and residual interaction parameters for isotopes of the chemical element 84-Po (Polonium, atomic number Z = 84).

  2. Corncob and active charcoal in the Laccase and Basidiome production of Pleurotus spSabugo de milho e carvão ativado na produção de Lacase e Basidiomas de Pleurotus sp

    Directory of Open Access Journals (Sweden)

    Gisele Maria Andrade-Nobrega

    2012-04-01

    Full Text Available Corn cob as a lignocellulosic feedstock could be a viable option for edible mushroom production by fungi of the genus Pleurotus considering that there are enormous amounts of this agricultural waste in the State of Parana, as well in the whole Brazil territory. This work evaluated three strains of Pleurotus sp., Pleurotus ostreatus (white and CCB, P. Eryngii (salmon, as laccase producers using liquid extract of corn cob, and solid medium based on corn cob without adding other nutritional sources. A strain of Pleurotus ostreatus (white produced the highest titres of laccase in liquid medium (1.2 U L-1 and also on solid medium (~ 2.8 U kg-1 among the three strains evaluated. The additon of active charcoal increased the biological efficency (30.3 % of P. eryngii (salmon when compared in its absence (12.7 %. However, the strain of P. ostreatus (white did not present statistical difference among the treatments demonstrating that the addition of active charcoal to the solid medium for mushroom production can promote an increase in the biological efficiency depending upon the fungal strain used.O sabugo de milho é uma matéria prima lignocelulósica que pode ser uma opção viável para a produção de cogumelos comestíveis por fungos do gênero Pleurotus, considerando-se que existe uma enorme quantidade deste resíduo agrícola no Estado do Paraná e em todo o Brasil. Este trabalho avaliou três linhagens de Pleurotus sp., Pleurotus ostreatus (branco e CCB e P. Eryngii (Salmão, como produtoras de lacase utilizando-se extrato líquido de sabugo de milho e em meio sólido à base de sabugo de milho, sem adicionar outras fontes de nutrientes. A linhagem de Pleurotus ostreatus (branco produziu os maiores títulos de lacase no meio líquido (1,2 U L-1 e também no sólido (~ 2,8 U kg-1 dentre as três linhagens avaliadas. A adição de carvão ativo aumentou a eficiência biológica (30,3 % do P. eryngii (salmão quando comparada com a ausência do

  3. A biokinetic study of {sup 209}Po in man

    Energy Technology Data Exchange (ETDEWEB)

    Henricsson, C.F.; Ranebo, Y. [Department of Medical Radiation Physics, Clinical Sciences in Lund, Lund University, Skane University Hospital in Lund (Sweden); Hansson, M. [Medical Radiation Physics, Department of Clinical Sciences in Malmoe, Lund University, Skane University Hospital in Malmoe (Sweden); Raeaef, C.L., E-mail: Christopher.Raaf@med.lu.se [Medical Radiation Physics, Department of Clinical Sciences in Malmoe, Lund University, Skane University Hospital in Malmoe (Sweden); Holm, E. [Norwegian Radiation Protection Authority, Osteras (Norway)

    2012-10-15

    Five adult volunteers participated in a biokinetic study of radioactive polonium. Portions of about 10 Bq of {sup 209}Po were orally administrated to four of the volunteers in a single ingestion. The fifth volunteer ingested a daily amount of 53 mBq of 209Po for 243 d to study the time to achieve equilibrium between intake and excretion for protracted intakes. For the subjects ingesting single intakes of {sup 209}Po complete sampling of urine and feces was subsequently collected the first few days upon the ingestion. The samples were processed with radiochemical extraction and analyzed with alpha spectrometry. In the study, the maximum daily excretion rates in feces were 18-50% of the ingested activity, observed within 3 d after intake. Regarding the urine excretion, the daily excretion peaked, on average, at 0.15-1% of the ingested activity within two days upon intake. These results indicate an average gastro-intestinal uptake fraction of 0.46 {+-} 0.08, which agrees well with earlier biokinetic studies of polonium in man. -- Highlights: Black-Right-Pointing-Pointer Human metabolism of an oral intake of polonium. Black-Right-Pointing-Pointer 4 individuals were administrated about 10 Bq polonium-209. Black-Right-Pointing-Pointer Gastro-intestinal uptake fraction, if orally administrated polonium-209 was investigated. Black-Right-Pointing-Pointer The biological half-time of polonium in human body was studied.

  4. Can Vanadium Be Substituted into LiFePO4

    Energy Technology Data Exchange (ETDEWEB)

    Omenya F.; Nam K.; Chernova N.A.; Upreti S.; Zavalij P.Y.; Nam K.-W.; Yang X.-Q.; Whittingham M.S.

    2011-11-08

    Vanadium is shown to substitute for iron in the olivine LiFePO{sub 4} up to at least 10 mol %, when the synthesis is carried out at 550 C. In the solid solution LiFe{sub 1-3y/2}V{sub y}PO{sub 4}, the a and b lattice parameters and cell volume decrease with increasing vanadium content, while the c lattice parameter increases slightly. However, when the synthesis is performed at 650 C, a NASICON phase, Li{sub 3}V{sub 2}(PO{sub 4}){sub 3}, is also formed, showing that solid solution is a function of the synthesis temperature. X-ray absorption near-edge structure indicates vanadium is in the 3+ oxidation state and in an octahedral environment. Magnetic studies reveal a shift of the antiferromagnetic ordering transition toward lower temperatures with increasing vanadium substitution, confirming solid solution formation. The addition of vanadium enhances the electrochemical performance of the materials especially at high current densities.

  5. New hybridization of PO, SBR, and MoM for scattering by large complex conducting objects

    Institute of Scientific and Technical Information of China (English)

    Dong Chunzhu; Geng Fangzhi; Yin Hongcheng; Wang Chao

    2007-01-01

    As a marked extension of the traditional MoM-PO (method of moment-physical optics) hybrid method,a new hybridization of PO, SBR, and MoM (MoM-SBR/PO) is presented to calculate the multi-reflection contribution in the PO region efficiently by introducing the method of SBR based on RDN notion, which avoids the time-consuming iterative procedure and the choice of proper Green's function. As compared with the traditional MoM-PO hybrid method, the calculation efficiency of the proposed method is greatly improved, and its validity is verified by numerical results.

  6. Towards a construction grammar account of the distributive PO in Polish

    Directory of Open Access Journals (Sweden)

    Adam Przepiórkowski

    2015-11-01

    Full Text Available Towards a construction grammar account of the distributive PO in Polish Polish distributive constructions involving the form po are well known for their syntactic and semantic idiosyncrasy. The aim of this paper is to show that, contrary to the received wisdom, two different lexemes po take part in such constructions: a preposition and an adnumeral operator. This explains some of the idiosyncratic behaviour, namely, the apparent ability of po to combine with different grammatical cases. A preliminary Construction Grammar analysis is proposed which eschews the potential problem of missed generalisations that such a dual account of po might engender.

  7. Effect of Li3PO4 coating of layered lithium-rich oxide on electrochemical performance

    Science.gov (United States)

    Chen, Dongrui; Zheng, Feng; Li, Liu; Chen, Min; Zhong, Xiaoxin; Li, Weishan; Lu, Li

    2017-02-01

    A novel composite of layered lithium-rich oxide, Li-Rich@Li3PO4, coated with Li3PO4 is synthesized through polydopamine template method. Physical characterizations reveal that Li-Rich@Li3PO4 is composed of nanoparticles of 100-200 nm that are coated with a uniform Li3PO4 layer of about 5 nm in thickness. Galvanostatic charge/discharge tests demonstrate enhanced cycling stability and largely increased rate capability of the material after Li3PO4 coating.

  8. Synthesis and luminescence properties of Ca5(PO43Cl:Eu2+ phosphor for solid state lighting

    Directory of Open Access Journals (Sweden)

    Deorao N. Game

    2016-03-01

    Full Text Available A novel method to prepare Eu2+ doped chlorapatite phosphor Ca5(PO43Cl useful for solid state lighting has been given in this paper. The phosphor was synthesized by the Pechini (citrate gel method which turned out to be more efficient than the conventional high temperature solid state reaction. The results of the photoluminescence (PL investigation revealed that it was possible to efficiently excite the phosphor by a UV–visible light from 220 to 430nm; the phosphor exhibited a bright blue emission at the wavelength λem=456nm for the excitation wavelength λex=350nm of near-ultraviolet light. The developed phosphor emits in blue and, hence, could provide one of the three (RGB primary color components in a phosphor-converted LED-producing white light.

  9. A poética e a política da prática

    Directory of Open Access Journals (Sweden)

    Michelle Kisliuk

    2014-11-01

    Full Text Available http://dx.doi.org/10.5902/1984644414780O presente ensaio, de caráter etnográfico, discorre sobre a relação entre poética e política na performance; parte do pressuposto que as artes ativistas, tais como a música e a dança podem constituir, junto à escolarização, a base política, intelectual e estética de uma dada comunidade.  Tais práticas, contudo, apresentam-se como sendo de risco. O texto realiza, ainda, uma tentativa de aproximação entre tais práticas – no que se refere à sua função e consequências - no contexto de uma comunidade africana e em instituições de ensino superior nos Estados Unidos. A escrita interativa e performativa pretende, ao fim e ao cabo, materializar um intercâmbio entre pesquisador de campo e as pessoas com quem trabalha, como também, representar e evocar o material e as ideias de que trata a pesquisadora.

  10. Synthesis and Electrochemical Properties of LiFePO4/C for Lithium Ion Batteries.

    Science.gov (United States)

    Gao, Hong; Wang, Jiazhao; Yin, Shengyu; Zheng, Hao; Wang, Shengfu; Feng, Chuanqi; Wang, Shiquan

    2015-03-01

    LiFePO4/C was prepared through a facile rheological phase reaction method by using Fe3(PO4)2, Li3PO4 · 8H2O, and glucose as reactants. The LiFePO4/C samples were characterized by X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The electrochemical properties of the samples were investigated. The results show that the LiFePO4/C samples have single-phase olivine-type structure, and their particles feature a spherical shape. The carbon coating on the particles of LiFePO4 is about 1.8% of the LiFePO4/C by weight. The particle size was distributed from 0.2 to 1 µm. The initial discharge capacity of LiFePO4/C reached 154 mA h/g at 0.1 C. The retained discharge capacity of LiFePO4/C was 152.9 mA h g(-1) after 50 cycles. The LiFePO4/C also showed better cycling performance than that of the bare LiPeO4 at a higher charge/discharge rate (1 C). The LIFePO4/C prepared in this way could be a promising cathode material for lithium ion battery application.

  11. H-PoP and H-PoPG: heuristic partitioning algorithms for single individual haplotyping of polyploids.

    Science.gov (United States)

    Xie, Minzhu; Wu, Qiong; Wang, Jianxin; Jiang, Tao

    2016-12-15

    Some economically important plants including wheat and cotton have more than two copies of each chromosome. With the decreasing cost and increasing read length of next-generation sequencing technologies, reconstructing the multiple haplotypes of a polyploid genome from its sequence reads becomes practical. However, the computational challenge in polyploid haplotyping is much greater than that in diploid haplotyping, and there are few related methods. This article models the polyploid haplotyping problem as an optimal poly-partition problem of the reads, called the Polyploid Balanced Optimal Partition model. For the reads sequenced from a k-ploid genome, the model tries to divide the reads into k groups such that the difference between the reads of the same group is minimized while the difference between the reads of different groups is maximized. When the genotype information is available, the model is extended to the Polyploid Balanced Optimal Partition with Genotype constraint problem. These models are all NP-hard. We propose two heuristic algorithms, H-PoP and H-PoPG, based on dynamic programming and a strategy of limiting the number of intermediate solutions at each iteration, to solve the two models, respectively. Extensive experimental results on simulated and real data show that our algorithms can solve the models effectively, and are much faster and more accurate than the recent state-of-the-art polyploid haplotyping algorithms. The experiments also show that our algorithms can deal with long reads and deep read coverage effectively and accurately. Furthermore, H-PoP might be applied to help determine the ploidy of an organism. https://github.com/MinzhuXie/H-PoPG CONTACT: xieminzhu@hotmail.comSupplementary information: Supplementary data are available at Bioinformatics online. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  12. Thermal treating as a tool to produce plastic pellets based on Eudragit RS PO and RL PO aimed for tableting.

    Science.gov (United States)

    Abbaspour, M R; Sadeghi, F; Afrasiabi Garekani, H

    2007-08-01

    A 3(2) full-factorial design was used for preparation of pellets using extrusion-spheronization technique. Independent variables were %ibuprofen (40, 60, 80) and %Eudragit RS PO/RL PO (0, 50, 100). In all formulations 3% w/w PVP K30 and 10% Avicel PH101 were also used. The pellets were cured in oven at 60 degrees C for 24h. The evaluated responses were crushing strength or yield point, elastic modulus and mean dissolution time (MDT) of pellets. The cured pellets were also compressed at 15kN compaction force and then observed under scanning electron microscope. It was shown that the cured pellets containing 40% or 60% drug exhibited a plastic deformation without any fracture under mechanical tests. The curing process resulted in significant decrease in the elastic modulus of the pellets. The SEM of the compressed pellets were also confirmed the plastic behavior of these pellets. The transition of pellet behavior from brittle to plastic upon curing was due to shift of Eudragit structure from glassy to rubbery state which was supported by DSC studies. However pellets with 80% drug showed brittle properties even after curing due to presence of less amount of Eudragit in their structure. Increasing the ratio of Eudragit RS in the pellets decreased the yield point and elastic modulus of cured pellets containing 40% or 60% drug, indicating more plastic behavior of these pellets. This was attributed to lower Tg of Eudragit RS than Eudragit RL. The curing process also retarded drug release from pellets and increased MDT. Increasing the ratio of Eudragit RS in the pellets increased MDT in cured pellets containing 40% or 60% drug but had no effect in pellets with 80% drug. Overall the results of this study revealed that thermal treating is a proper tool to produce plastic ibuprofen pellets based on Eudragit RS PO and Eudragit RL PO.

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

    Directory of Open Access Journals (Sweden)

    Guo-Feng Chen

    2012-08-01

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

  14. BiPO{sub 4}/reduced graphene oxide composites photocatalyst with high photocatalytic activity

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Yihe, E-mail: zyh@cugb.edu.cn [National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 10083 (China); Shen, Bo [National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 10083 (China); Huang, Hongwei, E-mail: hhw@cugb.edu.cn [National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 10083 (China); He, Ying [National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 10083 (China); Fei, Bin [Institute of Textile and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong (China); Lv, Fengzhu [National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 10083 (China)

    2014-11-15

    Graphical abstract: The composite photocatalysts composed of BiPO{sub 4} and reduced graphene oxide (rGO) were synthesized by a facile hydrothermal method. The BiPO{sub 4}/rGO composites exhibit much better photocatalytic performance than pure BiPO{sub 4}. - Highlights: • BiPO{sub 4} nanoparticles are immobilized on reduced graphene oxide (rGO) as photocatalysts. • The BiPO{sub 4}/rGO composites show enhanced photocatalytic activity than the pure BiPO{sub 4} nanoparticles. • The crystallization phases of BiPO{sub 4} can be determined by the amount of graphene. - Abstract: The composite photocatalysts composed of BiPO{sub 4} and reduced graphene oxide (rGO) were synthesized by a facile hydrothermal method. Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), transmission electron spectroscopy (TEM), photoluminescence emission spectra (PL) and UV–vis diffuse reflection spectroscopy (DRS) were used to characterize the titled composites. The results showed that the BiPO{sub 4} particles can be immobilized on the surface of rGO sheets, and the crystallization phases of BiPO{sub 4} were significantly influenced by the amount of graphene. The phase transformation of BiPO{sub 4} crystal from hexagonal to monoclinic phase was observed. The introduction of rGO improved the optical properties of BiPO{sub 4} and thereby enhancing the utilization of light. Compared with pure BiPO{sub 4} under similar synthesis condition, the BiPO{sub 4}/rGO composites exhibit a much higher photodegradation activity, which was confirmed by photoluminescence (PL) spectra and photocurrent (PC) generation.

  15. Synthesis of the LiFePO4/C core-shell nanocomposite using a nano-FePO4/polythiophene as an iron source

    Science.gov (United States)

    Liu, Jing; Yang, Guiling; Zhang, Xianfa; Wang, Jiawei; Wang, Rongshun

    2012-01-01

    For the first time, a LiFePO4/C core-shell nanocomposite has been synthesized using a nano-FePO4/polythiophene (PTh) as an iron source. With this method, the PTh is in situ polymerized to restrain the growth of FePO4 particles, and the typical size of FePO4/PTh particles is in the range of 20-50 nm. The optimized LiFePO4/C nanocomposite is synthesized at 750 °C using 40% citric acid. The prepared LiFePO4 particles show a typical size of 50-100 nm and they are fully coated by carbon of 2-4 nm thickness. The LiFePO4/C core-shell nanocomposite gives an improved high electronic conductivity and a good electrochemical behavior at high rates. Thus, this novel method is an effective and facile strategy to improve the rate performance of the LiFePO4 cathode.

  16. 正极材料LiFePO4的应用研究%Application of LiFePO4 cathode material

    Institute of Scientific and Technical Information of China (English)

    王荣

    2013-01-01

    随着锂离子电池在电动汽车、电动自行车等领域的应用,LiFePO4正极材料以其高安全性、长寿命的优点备受关注.从性能参数上分析对比了LiFePO4正极材料的特性,从应用角度讨论了LiFePO4材料在电池生产制造过程中存在的问题,并针对LiFePO4材料技术及电池制作工艺技术提出了改善建议.%With the application of Li-ion battery in electric vehicle and electric bicycle,LiFePO4 cathode material has attracted much attention.The characteristics of LiFePO4 were analyzed from the physical parameters.The problems exist in the manufacture of LiFePO4 was discussed from the point of application.Some suggestions about LiFePO4 material technology and battery production technology were given.

  17. Density functional theory study of lithium diffusion at the interface between olivine-type LiFePO4 and LiMnPO4

    Science.gov (United States)

    Shi, Jianjian; Wang, Zhiguo; Qing Fu, Yong

    2016-12-01

    Coating LiMnPO4 with a thin layer of LiFePO4 shows a better electrochemical performance than the pure LiFePO4 and LiMnPO4, thus it is critical to understand Li diffusion at their interfaces to improve the performance of electrode materials. Li diffusion at the (1 0 0)\\text{LiFeP{{\\text{O}}4}} //(1 0 0)\\text{LiMnP{{\\text{O}}4}} , (0 1 0)\\text{LiFeP{{\\text{O}}4}} //(0 1 0)\\text{LiMnP{{\\text{O}}4}} , and (0 0 1)\\text{LiFeP{{\\text{O}}4}} //(0 0 1)\\text{LiMnP{{\\text{O}}4}} interfaces between LiFePO4 and LiMnPO4 was investigated using density functional theory. The calculated diffusion energy barriers are 0.55 eV for Li to diffuse along the (0 0 1) interface, 0.44 and 0.49 eV for the Li diffusion inside the LiMnPO4 and along the (1 0 0) interface, respectively. When Li diffuses from the LiFePO4 to LiMnPO4 by passing through the (0 1 0) interfaces, the diffusion barriers are 0.45 and 0.60 eV for the Li diffusions in both sides. The diffusion barriers for Li to diffuse in LiMnPO4 near the interfaces decrease compared with those in the pure LiMnPO4. The calculated diffusion coefficient of Li along the (1 0 0) interface is in the range of 3.65  ×  10-11-5.28  ×  10-12 cm2 s-1, which is larger than that in the pure LiMnPO4 with a value of 7.5  ×  10-14 cm2 s-1. Therefore, the charging/discharging rate performance of the LiMnPO4 can be improved by surface coating with the LiFePO4.

  18. The Antimicrobial Efficacy of <em>Elaeis guineensisem>: Characterization, <em>in Vitroem> and <em>in Vivoem> Studies

    Directory of Open Access Journals (Sweden)

    Sreenivasan Sasidharan

    2012-04-01

    Full Text Available The urgent need to treat multi-drug resistant pathogenic microorganisms in chronically infected patients has given rise to the development of new antimicrobials from natural resources. We have tested <em>Elaeis guineensis em>Jacq> em>(Arecaceae methanol extract against a variety of bacterial, fungal and yeast strains associated with infections. Our studies have demonstrated that <em>E. guineensisem> exhibits excellent antimicrobial activity <em>in vitroem> and <em>in vivoem> against the bacterial and fungal strains tested. A marked inhibitory effect of the <em>E. guineensisem> extracts was observed against <em>C. albicansem> whereby <em>E. guineensisem> extract at ½, 1, or 2 times the MIC significantly inhibited <em>C. albicansem> growth with a noticeable drop in optical density (OD of the bacterial culture. This finding confirmed the anticandidal activity of the extract on <em>C. albicansem>. Imaging using scanning (SEM and transmission (TEM electron microscopy was done to determine the major alterations in the microstructure of the extract-treated <em>C. albicansem>. The main abnormalities noted via SEM and TEM studies were the alteration in morphology of the yeast cells. <em>In vivoem> antimicrobial activity was studies in mice that had been inoculated with <em>C. albicansem> and exhibited good anticandidal activity. The authors conclude that the extract may be used as a candidate for the development of anticandidal agent.<em> em>

  19. Preparation of Mono-dispersed LiFePO4 Spheres%单分散LiFePO4球的制备

    Institute of Scientific and Technical Information of China (English)

    王彬帅; 王军伟; 张静杰; 黄俊杰

    2010-01-01

    以Fe(NO3)3、LiCH3COO和NH4H2PO4为原料,葡萄糖为还原剂,通过水热反应辅以热处理过程制备了单分散的LiFePO4/C球.XRD结果表明得到了具有橄榄石结构的LiFePO4,SEM显示LiFePO4球的球茎在5μm左右.LiFePO4球的形成与葡萄糖的脱水缩聚碳化有关.

  20. Avaliação do tratamento biológico de lixiviado de aterro sanitário em escala real na Região Sul do Brasil

    Directory of Open Access Journals (Sweden)

    Iracema Souza Maia

    2015-12-01

    Full Text Available RESUMO Esta pesquisa avaliou o desempenho do sistema de tratamento biológico de lixiviado de um aterro sanitário em escala real formado por duas lagoas anaeróbias (LAs operadas em série, um sistema de lodos ativados (SLOA e uma lagoa facultativa (LF. O objetivo do estudo foi avaliar a eficiência desse sistema biológico por meio do monitoramento de variáveis físico-químicas e ensaios de toxicidade, já que existe carência de artigos científicos para estudos em escala real e para esse tipo de configuração no tratamento de lixiviados. As coletas foram realizadas com frequência quinzenal, seguidas de análises laboratoriais para caracterização dos diferentes lixiviados coletados ao longo do tratamento. A eficiência de remoção de matéria orgânica observada foi de 80 e 60% para carbono orgânico dissolvido e demanda química de oxigênio, respectivamente. O sistema apresentou ainda eficiência de 83 e 73% para remoção de nitrogênio amoniacal e fósforo, respectivamente. Observou-se uma diminuição média de 44% de toxicidade do lixiviado tratado, que apresentou características tóxicas para o organismo teste Daphnia magna . A configuração do sistema biológico demonstrou-se vantajosa na remoção de matéria orgânica e fração nitrogenada, contudo os resultados indicam a necessidade de tratamento complementar.

  1. Kinetic study on selective extraction of HCl and H3PO4 in a microfluidic device☆

    Institute of Scientific and Technical Information of China (English)

    Fang Zhao; Yangcheng Lu; Kai Wang; Guangsheng Luo

    2016-01-01

    In the extraction method for preparing KH2PO4, one of the key processes is the selective extraction of HCl over H3PO4. In our work, extraction kinetic studies have been carried out in a microfluidic device with a coaxial microchannel, using the extractant of 33.3%(by volume) trioctylamine (TOA) dissolved in n-octanol, with differ-ent aqueous phases:the HCl solution, the H3PO4 solution, and H3PO4 and KCl solutions of different concentra-tions. The changes of the extraction efficiency of HCl and H3PO4 and the selectivity for HCl along with the residence time were investigated. We found that fast extraction kinetics could be realized in microfluidic devices, and that HCl could be extracted faster than H3PO4 due to smaller mass transfer resistance and much stronger re-action between HCl and TOA. For the extraction of H3PO4 and KCl solutions, the selectivity for HCl first increased and then decreased when TOA was in excess of H3PO4 in the initial feeds, and in contrast, always increased when H3PO4 was in excess of TOA in the initial feeds. The diverse changes of selectivity for HCl along with the residence time indicate that a dynamic control of selectivity in microfluidic devices may be important and accessible for im-proving the KH2PO4 conversion efficiency in extraction method.

  2. Visible photocatalysis and photostability of Ag{sub 3}PO{sub 4} photocatalyst

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Lin; Li, Yuanzhi, E-mail: liyuanzhi66@hotmail.com; Hou, Jingtao; Yang, Yi

    2014-11-15

    Graphical abstract: - Highlights: • We systematically investigated the photocatalytic characteristics of Ag{sub 3}PO{sub 4}. • Ag{sub 3}PO{sub 4} cannot photodegrade volatile organic compounds such as benzene, acetone. • Ag{sub 3}PO{sub 4} is efficient for dye photodegradation rather than dye photomineralization. • Ag{sub 3}PO{sub 4} itself is photostable but quickly deactivate during dye photodegradation. - Abstract: Ag{sub 3}PO{sub 4} photocatalyst was prepared by precipitation method and characterized by SEM, XRD and diffusive reflectance UV–vis (DRUV–vis) absorption spectra. The gas-phase photodegradation of volatile organic compounds (VOCs) such as benzene and acetone, and the liquid-phase photodegradation of the cationic and anionic dyes on Ag{sub 3}PO{sub 4} were systematically investigated. Both benzene and acetone could not be photodegraded on the Ag{sub 3}PO{sub 4} photocatalyst under the visible irradiation. The Ag{sub 3}PO{sub 4} photocatalyst is efficient for the photodegradation of the aqueous dye solutions, but could not completely photomineralize the dyes to CO{sub 2} and H{sub 2}O. The reason is discussed by comparing the oxidation potential of organic pollutants and the potential of photogenerated holes in Ag{sub 3}PO{sub 4}, and measuring the absorption of organic pollutants on Ag{sub 3}PO{sub 4}. The photostability of the Ag{sub 3}PO{sub 4} photocatalyst for the photo-degradation of the dyes was tested. The Ag{sub 3}PO{sub 4} photocatalyst itself is photostable in the absence of the scavenger of the photogenerated holes, but is photocatalytically instable in the liquid-phase photodegradation of dyes due to the photoreduction of Ag{sup +} in Ag{sub 3}PO{sub 4} to Ag.

  3. 210Po in Nevada groundwater and its relation to gross alpha radioactivity

    Science.gov (United States)

    Seiler, R.L.

    2011-01-01

    Polonium-210 (210Po) is a highly toxic alpha emitter that is rarely found in groundwater at activities exceeding 1 pCi/L. 210Po activities in 63 domestic and public-supply wells in Lahontan Valley in Churchill County in northern Nevada, United States, ranged from 0.01 ± 0.005 to 178 ± 16 pCi/L with a median activity of 2.88 pCi/L. Wells with high 210Po activities had low dissolved oxygen concentrations (less than 0.1 mg/L) and commonly had pH greater than 9. Lead-210 activities are low and aqueous 210Po is unsupported by 210Pb, indicating that the 210Po is mobilized from aquifer sediments. The only significant contributors to alpha particle activity in Lahontan Valley groundwater are 234/238U, 222Rn, and 210Po. Radon-222 activities were below 1000 pCi/L and were uncorrelated with 210Po activity. The only applicable drinking water standard for 210Po in the United States is the adjusted gross alpha radioactivity (GAR) standard of 15 pCi/L. 210Po was not volatile in a Nevada well, but volatile 210Po has been reported in a Florida well. Additional information on the volatility of 210Po is needed because GAR is an inappropriate method to screen for volatile radionuclides. About 25% of the samples had 210Po activities that exceed the level associated with a lifetime total cancer risk of 1× 10−4 (1.1 pCi/L) without exceeding the GAR standard. In cases where the 72-h GAR exceeds the uranium activity by more than 5 to 10 pCi/L, an analysis to rule out the presence of 210Po may be justified to protect human health even though the maximum contaminant level for adjusted GAR is not exceeded.

  4. Reactive alumina–LaPO4 composite as machinable bioceramics

    Indian Academy of Sciences (India)

    Abhishek Badolia; Ritwik Sarkar; Sumit Kumar Pal

    2015-08-01

    Sintered Al2O3–LaPO4 composites were prepared using commercially available reactive alumina and phase pure lanthanum phosphate (LP), prepared by the reaction synthesis technique. LP content was varied between 10 and 50 wt% and sintering was carried out between 1400 and 1600°C. Sintered composites were characterized for phase analysis, densification, strength, machinability, microstructure and bioactivity (in SBF solution) and biocompatibility (MTT assay protocol) studies. Composite nature was confirmed by phase analysis and LP was found to reduce the densification and strength values but imparted machinability. Again positive bioactivity and biocompatibility character were observed for all the compositions.

  5. Estimation of the band gap of InPO4

    Science.gov (United States)

    Wager, J. F.; Wilmsen, C. W.; Kazmerski, L. L.

    1983-04-01

    The band gap of a thin layer of InPO4 was estimated to be 4.5 eV using a novel approach employing ultraviolet photoelectron spectroscopy and electron energy loss spectroscopy. The technique measures the conduction-band minimum and valence-band maximum referenced to the In 4d core line energy. Since this technique is highly surface sensitive, it can be used to measure the band gap of a thin layer. This parameter is difficult to measure in such layers using conventional techniques.

  6. Conductivity studies in SnO–NaPO3 glasses

    Indian Academy of Sciences (India)

    M Harish Bhat; Munia Ganguli; K J Rao

    2003-06-01

    Na+ ion conductivity has been studied in SnO.NaPO3 glasses, which have been prepared over a wide range of compositions using a microwave melting technique. D.c. activation barriers seem to reflect the structural changes in system. A.c. conductivity analysis has revealed that while the power law exponent, , seem to bear correlation to the structural changes, the exponent of the stretched exponential function describing the dielectric relaxation is largely insensitive to the structure. Possible importance of the correlation of transport property to the variation of available non-bridging oxygen (NBO) atoms in the structure is discussed.

  7. A poética de Edgar Allan Poe

    Directory of Open Access Journals (Sweden)

    Kiefer, Charles

    2009-01-01

    Full Text Available O estudo abrange o início da vida literária de Edgar Allan Poe como crítico do periódico Graham’s Magazine. Ao produzir resenhas sobre Nathanael Hawthorne, Poe elabora uma síntese de suas concepções a respeito do conto. Para o autor a vantagem do conto, como gênero, é que ele permite uma leitura totalizadora. O exame das resenhas de Poe torna possível uma aproximação entre a poética do autor norte-americado com a de Aristóteles

  8. The poços de caldas project

    CERN Document Server

    Chapman, NA; Shea, ME; Smellie, JAT

    1993-01-01

    The safe disposal of radioactive wastes by burial in deep geological formations requires long-term predictions of the future behaviour of the wastes and their engineered repository. Such predictions can be tested by evaluating processes analogous to those which will occur in a repository, which have been long active in the natural geochemical environment. The Poços de Caldas Project is a comprehensive study of two ore deposits in Minas Gerais, Brazil, aimed at looking at uranium and thorium series radionuclide and rare-earth element mobility, the development and movement of redox fronts, and

  9. Perception of Blended Learning Inventory (PoBLi)

    DEFF Research Database (Denmark)

    Lassesen, Berit; Stenalt, Maria Hvid; Rossen, Dorte Sidelmann

    -to-face med online læring (Blended Learning). I et studie fandt Ellis og kolleger (2006), at undervisere, der overvejende havde opfattelsen af, at de studerende lærte ved, at han/hun formidlede viden til dem, havde en simpel, fragmenteret opfattelse af potentialet ved BL. Derimod syntes en mere......) underviseres oplevelse af undervisningsmiljøet Resultater: Spørgeskema og resultaterne af de foreløbige analyser vil blive præsenteret og diskuteret. Perspektiver: PoBLi-projektet vil bidrage til den eksisterende forskning vedrørende rationalet for inddragelse af blended learning-formatet i...

  10. Počeci igranja nogometa u Ðakovu

    OpenAIRE

    Bijelić, Borislav

    2008-01-01

    U članku se pokušava odgovoriti na pitanja kada se i u kakvim prilikama počeo igrati nogomet u Ðakovu. Na osnovi uvida u relativno skromnu građu, autor ističe kako se nogomet u Ðakovu organizirano igra već od 1908. godine te da je do izbijanja Drugoga svjetskog rata u gradu djelovalo nekoliko klubova. Prvi među njima koji je uspio opstati duže od godinu dana bio je Hrvatski športski klub “Orao”.

  11. Atomic Mass and Nuclear Binding Energy for Po-269 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-269 (Polonium, atomic number Z = 84, mass number A = 269).

  12. Atomic Mass and Nuclear Binding Energy for Po-278 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-278 (Polonium, atomic number Z = 84, mass number A = 278).

  13. Atomic Mass and Nuclear Binding Energy for Po-282 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-282 (Polonium, atomic number Z = 84, mass number A = 282).

  14. Atomic Mass and Nuclear Binding Energy for Po-271 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-271 (Polonium, atomic number Z = 84, mass number A = 271).

  15. Atomic Mass and Nuclear Binding Energy for Po-283 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-283 (Polonium, atomic number Z = 84, mass number A = 283).

  16. Atomic Mass and Nuclear Binding Energy for Po-281 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-281 (Polonium, atomic number Z = 84, mass number A = 281).

  17. Atomic Mass and Nuclear Binding Energy for Po-284 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-284 (Polonium, atomic number Z = 84, mass number A = 284).

  18. Atomic Mass and Nuclear Binding Energy for Po-280 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-280 (Polonium, atomic number Z = 84, mass number A = 280).

  19. Atomic Mass and Nuclear Binding Energy for Po-272 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-272 (Polonium, atomic number Z = 84, mass number A = 272).

  20. Atomic Mass and Nuclear Binding Energy for Po-276 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-276 (Polonium, atomic number Z = 84, mass number A = 276).

  1. Atomic Mass and Nuclear Binding Energy for Po-277 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-277 (Polonium, atomic number Z = 84, mass number A = 277).

  2. Atomic Mass and Nuclear Binding Energy for Po-275 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-275 (Polonium, atomic number Z = 84, mass number A = 275).

  3. Atomic Mass and Nuclear Binding Energy for Po-273 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-273 (Polonium, atomic number Z = 84, mass number A = 273).

  4. Atomic Mass and Nuclear Binding Energy for Po-274 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-274 (Polonium, atomic number Z = 84, mass number A = 274).

  5. Atomic Mass and Nuclear Binding Energy for Po-270 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-270 (Polonium, atomic number Z = 84, mass number A = 270).

  6. Atomic Mass and Nuclear Binding Energy for Po-279 (Polonium)

    Science.gov (United States)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei with Z = 101 - 130. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Po-279 (Polonium, atomic number Z = 84, mass number A = 279).

  7. An emergency bioassay method for (210)Po in urine.

    Science.gov (United States)

    Guérin, Nicolas; Dai, Xiongxin

    2015-09-01

    A rapid method was developed to efficiently measure (210)Po in urine samples in an emergency situation. Polonium-210 in small urine samples (10 mL) was spontaneously deposited on a stainless steel disc in 1 M HCl at room temperature for 4 h in a polyethylene bottle. The metallic disc was then counted for 4 h by alpha spectrometry. The developed method allowed the preparation of large sample batch in a short time. The method meets the requirements for an emergency bioassay procedure.

  8. Prediction of Wind Energy Resources (PoWER) Users Guide

    Science.gov (United States)

    2016-01-01

    used for fixed-site generators). PoWER is hosted on Apple iOS and Android (mobile device operating systems) based smartphones and tablets (referred...henceforth referred to as the “ app ”) provides information on the instantaneous electrical power and energy that can be generated by a wind generator...to from here on as the “device”). The functionality is identical between the iOS and Android device and the screen displays are similar between the 2

  9. Efficient Heterologous Transformation of <em>Chlamydomonas> reinhardtiiem> <em>npq2em> Mutant with the Zeaxanthin Epoxidase Gene Isolated and Characterized from<em> Chlorella zofingiensisem>

    Directory of Open Access Journals (Sweden)

    Herminia Rodríguez

    2012-09-01

    Full Text Available In the violaxanthin cycle, the violaxanthin de-epoxidase and zeaxanthin epoxidase catalyze the inter-conversion between violaxanthin and zeaxanthin in both plants and green algae. The zeaxanthin epoxidase gene from the green microalga <em>Chlorella zofingiensisem> (<em>Czzep> has been isolated<em>. em>This gene encodes a polypeptide of 596 amino acids. A single copy of <em>Czzep> has been found in the <em>C. zofingiensisem> genome by Southern blot analysis. qPCR analysis has shown that transcript levels of <em>Czzep> were increased after zeaxanthin formation under high light conditions. The functionality of <em>Czzep> gene by heterologous genetic complementation in the <em>Chlamydomonas> mutant <em>npq2em>, which lacks zeaxanthin epoxidase (ZEP activity and accumulates zeaxanthin in all conditions, was analyzed. The <em>Czzep> gene was adequately inserted in the pSI105 vector and expressed in <em>npq2em>. The positive transformants were able to efficiently convert zeaxanthin into violaxanthin, as well as to restore their maximum quantum efficiency of the PSII (Fv/Fm. These results show that <em>Chlamydomonas> can be an efficient tool for heterologous expression and metabolic engineering for biotechnological applications.

  10. Heterose em suínos na fase de aleitamento

    Directory of Open Access Journals (Sweden)

    José Bento Sterman Ferraz

    1991-12-01

    Full Text Available Visando avaliar o ganho de produtividade, advindo da heterose, no peso de suínos em fase de aleitamento, analisaram-se os pesos ao nascimento(PO, 21 dias de idade (P21 e desmama (PD de 746leitões, sendo 201 da raça Landrace, 136 Wessex-Saddleback e 409 mestiços, pelo método dos quadrados mínimos, considerando-se, ainda, os efeitos fixos de época e ano de nascimento, ordem do parto, sexo do leitão e tamanho da leitegada, além de raças paterna e materna e suas interações. Os efeitos não genéticos tiveram influência significativa em quase todas as características. Os mestiços mostraram, em geral, pesos superiores aos puros, com estimativas de heterose de 2,6% para PO, 9,7% para P21 e 13,9% para PD, indicando a importância da herança não aditiva à medida que os leitões ficam menos dependentes de suas mães. Os efeitos de interação entre as raças paterna e materna foram cada vez maiores com o avançar da idade. Os resultados indicam haver ganho de produtividade coma utilização deste tipo de cruzamento.

  11. Dermatoses em renais cronicos em terapia dialitica

    Directory of Open Access Journals (Sweden)

    Luis Alberto Batista Peres

    2014-03-01

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

  12. Preparation of Machinable Y-TZP/LaPO4 Composite Ceramics by Liquid Precursor Infiltration

    Institute of Scientific and Technical Information of China (English)

    周振君; 杨正方; 袁启明; 李秀华

    2002-01-01

    A machinable Y-TZP/LaPO4 composite ceramic was prepared by infiltrating LaPO4 liquid precursor into Y-TZP porous ceramic. Sintered Y-TZP ceramic preformed with 35% (volume fraction) open pore volume was made by adding graphite (30%, volume fraction). The Y-TZP/LaPO4 composite ceramics containing different LaPO4 contents were obtained by infiltration and pyrolysis cycles. The machinability and mechanical properties of materials were investigated. The results show that the machinable Y-TZP/LaPO4 composite ceramics containing 2.3% to 7.5% (volume fraction) LaPO4 has good machinability as well as outstanding mechanical properties.

  13. Thermodynamics and dynamical properties of the KH2PO4 type ferroelectric compounds. A unified model

    Directory of Open Access Journals (Sweden)

    R.R. Levitskii

    2009-01-01

    Full Text Available Within the framework of the proposed unified proton ordering model for the ferroelectric compounds of the KH2PO4 family, in the four-particle cluster approximation for the short-range interactions and mean field approximation for the long-range interactions, we calculate thermodynamic and longitudinal dynamic characteristics of the KD2PO4 type ferroelectrics and ND4D2PO4 type antiferroelectrics. Calculations for partially deuterated K(H1-xDx2PO4 type ferroelectrics and N(H1-xDx4(H1-xDx2PO4 type antiferroelectrics are performed within the mean crystal approximation. It is shown that at the proper choice of the theory parameters, a good quantitative description of experimental data for the KH2PO4 family crystals is obtained.

  14. Bioassay-Guided Isolation and Identification of Cytotoxic Compounds from <em>Gymnosperma> <em>glutinosum> Leaves

    Directory of Open Access Journals (Sweden)

    Cristina Rodríguez-Padilla

    2012-09-01

    Full Text Available Bioassay-guided fractionation of hexane extracts of<em> Gymnosperma glutinosumem> (Asteraceae leaves, collected in North Mexico, afforded the known compounds hentriacontane (1 and (+-13<em>S>,14<em>R>,15-trihydroxy-<em>ent>-labd-7-ene (2, as well as the new <em>ent>-labdane diterpene (−-13<em>S>,14<em>R>,15-trihydroxy-7-oxo-<em>ent>-labd-8(9-ene (3. In addition, D-glycero-D-galactoheptitol (4 was isolated from the methanolic extract of this plant. Their structures were established on the basis of high-field 1D- and 2D NMR methods supported by HR-MS data. The cytotoxic activity was determined by using the <em>in vitroem> L5178Y-R lymphoma murine model. Hentriacontane (1 and the new <em>ent>-labdane 3 showed weak cytotoxicity, whereas the <em>ent>-labdane 2 showed significant (<em>p> < 0.05 and concentration dependent cytotoxicity (up to 78% against L5178Y-R cells at concentrations ranging from 7.8 to 250 µg/mL.

  15. Ontwikkeling en perspektief in die Afrikaanse poësie

    Directory of Open Access Journals (Sweden)

    A.P. Grové

    1967-03-01

    Full Text Available In die oorweging van my opdrag — om te praat oor ontwikkeling en perspektief in die Afrikaanse poësie — het ek my afgevra of, en in hoeverre dan, die terme „ontwikkeling” en „perspektief” in die verband met mekaar versoenbaar is. Op ’n bepaalde manier gesien dui dié woorde op twee benaderingswyses wat nogal skerp teenoor mekaar te staan kom. Rig ons ons op ontwikkeling, is die geskiedenis, die verloop in die tyd van deurslaggewende betekenis en sal ons in ’n hoë mate chronologies (of miskien anti-chronologies te werk moet gaan, sal ons as 't ware saam met die tyd oor die hele terrein van ons poësie moet beweeg. Soek ons na perspektief, daarenteen, word die persoonlike instelling deurslaggewend, want nou staan ons stil en kan ons vanaf ’n bewus gekose, voordelige waarnemingspunt die landskap in oënskou neem, kan ons verskynsels en verhoudinge weergee soos hulle op ’n bepaalde moment in ons gesigsveld te staan kom.

  16. Cultivo in vitro de plântulas de orquídea em meios com diferentes concentrações de fertilizante mineral

    Directory of Open Access Journals (Sweden)

    Donizetti Tomaz Rodrigues

    2012-02-01

    Full Text Available Existem diversos meios nutritivos utilizados no cultivo in vitro de orquídeas, com diferentes composições e concentrações de sais, resultando em respostas distintas entre eles. O objetivo deste trabalho foi avaliar o crescimento in vitro de plântulas de orquídea (Cattleya walkeriana Gardner sob diferentes doses de fertilizante NPK, adicionado ao meio de cultivo, como fonte de nutrientes. Foi utilizado o fertilizante Peters® na formulação NPK 10-30-20 + Mg + micronutrientes, nas doses de: 0,0; 1,0; 2,0; 3,0; 4,0; 5,0 e 10,0 g L-1 de meio, acrescido de água de coco (150 mL L-1, sacarose (20 g L-1, carvão ativado (2 g L-1 e pH corrigido para 5,6. Foram utilizados frascos de vidro de 320 mL de capacidade, contendo 35 mL de meio onde foram inoculadas dez plântulas com seis meses de idade, previamente germinadas em meio Knudson C. O experimento foi mantido em sala de crescimento a 27 ± 2 ºC, 16/8 h luz/escuro e irradiância de 48 µmol m-2 s-1. A produção máxima de matéria seca da parte aérea das plantas, aos seis meses de idade, foi estimada em 0,255 g/frasco com uso de 5,22 g L-1 do fertilizante adicionado ao meio de cultura. Considerando a possibilidade de salinidade elevada do meio, para algumas espécies de orquídea, estimou-se a dose de fertilizante (3,55 g L-1 necessária para obtenção de 90% da produção máxima. As raízes apresentaram drástica redução do crescimento (menor número e curtas em condições de alta concentração de fertilizante.

  17. Alterações isoenzimáticas em sementes de cultivares de soja em diferentes condições de armazenamento

    Directory of Open Access Journals (Sweden)

    Everson Reis Carvalho

    2014-12-01

    Full Text Available O objetivo deste trabalho foi determinar alterações fisiológicas e isoenzimáticas em sementes de genótipos de soja, em diferentes condições de armazenamento. Utilizou-se o delineamento experimental inteiramente casualizado com quatro repetições, em arranjo fatorial com seis cultivares de soja (TMG 1176, TMG 1179, TMG 132, TMG 133, TMG 115 e GB 874 e cinco periodos de armazenamento (0, 2, 4, 6 e 8 meses, em dois ambientes de armazenamento (câmara fria e seca, a 10ºC e 50% de umidade relativa; e armazém convencional, em condições não controladas. A qualidade fisiológica foi avaliada por meio de testes de germinação, de envelhecimento acelerado e de frio. As expressões isoenzimáticas determinadas foram as de malato desidrogenase (MDH, álcool desidrogenase (ADH, esterase (EST, isocitrato liase (ICL, superóxido dismutase (SOD e peroxidase (PO. Sementes de soja armazenadas em câmara fria e seca conservaram sua qualidade fisiológica. Após seis meses de armazenamento, em condições não controladas, a qualidade das sementes e as atividades isoenzimáticas de MDH, ADH, EST, ICL, SOD e PO diminuíram. No armazenamento em câmara fria e seca, não ocorreu alteração nas sementes. Os genótipos de soja apresentam diferentes níveis de tolerância ao armazenamento e expressões isoenzimáticas.

  18. Diversity in growth and expression pattern of PoHKT1 and PoVHA transporter genes under NaCl stress in Portulaca oleracea taxa

    Directory of Open Access Journals (Sweden)

    El-Bakatoushi R.

    2016-01-01

    Full Text Available Plant growth and the expression of two transporter genes; PoHKT1 and PoVHA transcripts in root and shoot tissues were studied under salt stress of three Portulaca oleracea s.l. taxa. The study showed no significant differences in ratios between root lengths in saline and non-saline treatments of the three taxa, which was correlated with a clear down-regulation of the PoHKT1 transcripts in the root after 150mM NaCl. All measured growth parameters except root length increased in P. oleraceae, decreased in P. granulatostellulata and remain unchanged after 100mM NaCl in P. nitida compared to control under saline conditions. The result was consistent with the type of taxon which had significant effect on the shoot length, number of leaves and dry weight (P< 0.05. All measured growth parameters except root length showed a significant negative correlation with the shoot fold change of PoHKT1 transcripts (r = -0.607, -0.693 and -0.657 respectively. The regulation of PoVHA in root and shoot tissues in the three taxa are significantly different. Under salt stress, both decreased uptake of Na+ into the cytosol by decreasing the expression of PoHKT1 and increased vascular compartmentalization ability of Na+ by inducing the expression of PoVHA seem to work more efficiently in P. oleraceae and P. nitida than in P. granulato-stellulata.

  19. PoPSat: The Polar Precipitation Satellite Mission

    Science.gov (United States)

    Binder, Matthias J.; Agten, Dries; Arago-Higueras, Nadia; Borderies, Mary; Diaz-Schümmer, Carlos; Jamali, Maryam; Jimenez-Lluva, David; Kiefer, Joshua; Larsson, Anna; Lopez-Gilabert, Lola; Mione, Michele; Mould, Toby JD; Pavesi, Sara; Roth, Georg; Tomicic, Maja

    2017-04-01

    The terrestrial water cycle is one of many unique regulatory systems on planet Earth. It is directly responsible for sustaining biological life on land and human populations by ensuring sustained crop yields. However, this delicate balanced system continues to be influenced significantly by a changing climate, which has had drastic impacts particularly on the polar regions. Precipitation is a key process in the weather and climate system, due to its storage, transport and release of latent heat in the atmosphere. It has been extensively investigated in low latitudes, in which detailed models have been established for weather prediction. However, a gap has been left in higher latitudes above 65°, which show the strongest response to climate changes and where increasing precipitations have been foreseen in the future. In order to establish a global perspective of atmospheric processes, space observation of high-latitude areas is crucial to produce globally consistent data. The increasing demand for those data has driven a critical need to devise a mission which fills the gaps in current climate models. The authors propose the Polar Precipitation Satellite (PoPSat), an innovative satellite mission to provide enhanced observation of light and medium precipitation, focusing on snowfall and light rain in high latitudes. PoPSat is the first mission aimed to provide high resolution 3D structural information about snow and light precipitation systems and cloud structure in the covered areas. The satellite is equipped with a dual band (Ka and W band) phased-array radar. These antennas provide a horizontal resolution of 2 km and 4 km respectively which will exceed all other observations made to date at high-latitudes, while providing the additional capability to monitor snowfall. The data gathered will be compatible and complementary with measurements made during previous missions. PoPSat has been designed to fly on a sun-synchronous, dawn-dusk orbit at 460 km. This orbit

  20. Vervanging en aanverwante verskynsels in die poësie van Breyten Breytenbach

    Directory of Open Access Journals (Sweden)

    M. Lombard

    1984-05-01

    Full Text Available Die leser word dikwcls getref deur Breyten Breytenbach se geniale taalvernuf; so geniaal dat dit vir die oningewyde dikwels ontoeganklik is. Breytenbach se poësie het blykbaar sy eie manier van kommunikasie, sy eie poëtiese logika. Een faset daarvan, en myns insiens van ingrypende belang vir die verstaan van sy poësie, is vervanging en aanverwante verskynsels.

  1. Nanocomposite Electrodes for Advanced Lithium Batteries: The LiFePO4 Cathode

    Science.gov (United States)

    2001-11-01

    The LiFePO4 Cathode DISTRIBUTION: Approved for public release, distribution unlimited This paper is part of the following report: TITLE: Nanophase and...Nanocomposite Electrodes for Advanced Lithium Batteries: The LiFePO4 Cathode Shoufeng Yang, Yanning Song, Peter Y. Zavalij and M. Stanley Whittingham...Institute for Materials Research, Binghamton University, Binghamton, NY 13902-1600, U.S.A. ABSTRACT LiFePO4 was successfully synthesized by high temperature

  2. em arquitetura e urbanismo

    Directory of Open Access Journals (Sweden)

    Ana Maria Sala Minucci Martins

    2006-01-01

    Full Text Available Está sendo desenvolvido projeto de pesquisa denominado Geometria Fractal e suas Aplicações em Arquitetura e Urbanismo, com o fito de estudar e desenvolver ferramentas analíticas e propositivas para serem aplicadas em arquitetura e urbanismo, com base em conceitos provenientes da geometria fractal.

  3. {sup 210}Po and {sup 210}Pb intake by the Portuguese population: The contribution of seafood in the dietary intake of {sup 210}Po and {sup 210}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, F.P. [Instituto Nacional de Engenharia e Tecnolgia Industrial, Savavem (Portugal)

    1995-10-01

    Through analysis of {sup 210}Po and {sup 210}Pb in the diet, the average ingestion rate for the Portuguese population is estimated at 1.2 and 0.47 Bq d{sup -1} per capita for {sup 210}Po and {sup 210}Pb, respectively. Detailed analysis of foods indicate that seafood alone contributes up to 70% of the {sup 210}Po ingestion rate, whereas cerals, vegetables, and meat altogether contribute 79% of the {sup 210}Pb ingestion rate. Consumption of seafood, both in terms of quantities (kg d{sup -1} per person) and preferential consumption of certain marine species, is the cause of the relatively high intake of {sup 210}Po and high {sup 210}Po:{sup 210}Pb ratio in the diet in comparison with other countries. Other {sup 210}Po and {sup 210}Pb sources, namely inhalation of surface air and cigarette smoke, contribute only a small percentage of the adsorption of these radionuclides in the blood. Estimated total body burdens of {sup 210}Po and {sup 210}Pb in adult men, 70 Bq, are 3.5 times higher than estimates for humans living in normal radioactivity regions and consuming a reference diet. Average whole body effective doses for the adult from the Portuguese population are estimated at about 85 {mu}Sv y{sup -1} from {sup 210}Po and 170 {mu}Sv y{sup -1} from {sup 210}Pb adsorbed with the diet. Effective dose from {sup 210}Po in the diet may vary from 25 {mu}Sv y{sup -1} in an heavy consumer of sardines, to 1,000 {mu}Sv y{sup -1} in an hypothetical heavy consumer of molluscs. 46 refs., 2 figs., 4 tabs.

  4. Antimicrobial Activity of Geranium Oil against Clinical Strains<em> em>of <em>Staphylococcus aureusem>

    Directory of Open Access Journals (Sweden)

    Monika Sienkiewicz

    2012-08-01

    Full Text Available The aim of this work was to investigate the antibacterial properties of geranium oil obtained from <em>Pelargonium graveolensem> Ait. (family <em>Geraniaceae>, against one standard <em>S. aureus em>strain ATCC 433000 and seventy clinical <em>S. aureusem> strains. The agar dilution method was used for assessment of bacterial growth inhibition at various concentrations of geranium oil. Susceptibility testing of the clinical strains to antibiotics was carried out using the disk-diffusion and E-test methods. The results of our experiment showed that the oil from <em>P. graveolensem> has strong activity against all of the clinical <em>S. aureusem> isolates—including multidrug resistant strains, MRSA strains and MLSB-positive strains—exhibiting MIC values of 0.25–2.50 μL/mL.

  5. GLOBAL ANALYSIS OF SPECTRA OF THE PO2 RADICAL IN THE GAS PHASE

    Institute of Scientific and Technical Information of China (English)

    LIU YU-YAN; LIU XIAO-YON; LIU HONG-PING; GUo YUAN-QING; HUANG GUANG-MING; DUAN CHUAN-XI

    2000-01-01

    A global analysis of all available and identified spectra of the PO2 radical has been performed. In this analysis, the infrared spectra of the v3 band, the microwave and far infrared laser magnetic resonance transitions in the ground state are fitted simultaneously to the effective Hamiltonian for asymmetric top molecules. Since the analysis absorbs reliable experimental data extensively, it bears the most precise and most complete set of molecular constants for PO2. These molecular constants can be used to reproduce the spectra of PO2 accurately. Attention is also paid to the similarity and difference between PO2 and NO2.

  6. Sequential microfluidic flow synthesis of CePO4 nanorods decorated with emission tunable quantum dots.

    Science.gov (United States)

    Fang, Jie; Evans, Cameron W; Willis, Glen J; Sherwood, David; Guo, Yanglong; Lu, Guanzhong; Raston, Colin L; Iyer, K Swaminathan

    2010-10-07

    CePO(4) nanorods decorated with QDs (QDs@CePO(4)) can be prepared in a sequential, aqueous procedure under continuous flow using a rotating tube processor and a narrow channel reactor. The emission from the QD@CePO(4) is tunable from green to red by simply adjusting the feeding rate, which in turn regulates the particle size of the QDs. The Ce(3+) ions in the QDs@CePO(4) serve as an efficient fluorescence resonance energy transfer (FRET) donor, effectively enlarging the Stokes shift of the QDs.

  7. Origin of Activity and Stability Enhancement for Ag3PO4 Photocatalyst after Calcination

    Directory of Open Access Journals (Sweden)

    Pengyu Dong

    2016-11-01

    Full Text Available Pristine Ag3PO4 microspheres were synthesized by a co-precipitation method, followed by being calcined at different temperatures to obtain a series of calcined Ag3PO4 photocatalysts. This work aims to investigate the origin of activity and stability enhancement for Ag3PO4 photocatalyst after calcination based on the systematical analyses of the structures, morphologies, chemical states of elements, oxygen defects, optical absorption properties, separation and transfer of photogenerated electron-hole pairs, and active species. The results indicate that oxygen vacancies (VO˙˙ are created and metallic silver nanoparticles (Ag NPs are formed by the reaction of partial Ag+ in Ag3PO4 semiconductor with the thermally excited electrons from Ag3PO4 and then deposited on the surface of Ag3PO4 microspheres during the calcination process. Among the calcined Ag3PO4 samples, the Ag3PO4-200 sample exhibits the best photocatalytic activity and greatly enhanced photocatalytic stability for photodegradation of methylene blue (MB solution under visible light irradiation. Oxygen vacancies play a significantly positive role in the enhancement of photocatalytic activity, while metallic Ag has a very important effect on improving the photocatalytic stability. Overall, the present work provides some powerful evidences and a deep understanding on the origin of activity and stability enhancement for the Ag3PO4 photocatalyst after calcination.

  8. Study on preparation and performances of CDPVC/Ag3PO4 composite photocatalyst

    Directory of Open Access Journals (Sweden)

    Peng WANG

    2016-04-01

    Full Text Available PVC/Ag3PO4 composites are prepared by solution-dipping method, and the as-prepared composites are heat-treated to release HCl from PVC molecules to obtain conjugated derivative of PVC/Ag3PO4(CDPVC/Ag3PO4 composites. The CDPVC/Ag3PO4 composites are characterized by XRD, SEM, UV-vis DRS, PL and XPS. The effects of preparation conditions on the visible-light photocatalytic performances of CDPVC/Ag3PO4 composites are investigated by evaluating the decomposition of methyl orange under visible light irradiation. The results reveal that the modification of CDPVC is beneficial to the dispersion of Ag3PO4 particles, and it can obviously improve the absorbance of the CDPVC/Ag3PO4 composites in the range of visible light and the charge separation efficiency. The CDPVC/Ag3PO4 composites exhibit excellent visible-light photocatalytic acitivity and stability when the mass percentage of PVC to Ag3PO4, heat-treatment temperature and time are 0.03%, 130 ℃, and 2 h, respectively.

  9. Annual effective dose of {sup 210}Po from sea food origin (Oysters and Mussels) in Korea

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Bo Eum; Hong, Gi Hoon; Kim, Suk Hyun; Lee, Hyun Mi [Korea Institute of Ocean Science and Technology, Ansan (Korea, Republic of)

    2016-09-15

    Ingestion of {sup 210}Po laden seafood accounts for a substantial amount of the effective dose of {sup 210}Po. Among seafood items, mollusks, especially domestically produced oysters and mussels, are highly enriched in {sup 210}Po and are consumed in large quantities in Korea. Oysters and mussels around the Korean coasts were collected from major farm areas in November 2013. Samples were spiked with an aliquot of {sup 210}Po as a yield tracer, and they were digested with 6 mol·L{sup -1} HNO{sub 3} and H{sub 2}O{sub 2}. The {sup 210}Po and {sup 209}Po were spontaneously deposited onto a silver disc in an acidic solution of 0.5 mol·L{sup -1} HCl and measured using an alpha spectrometer. The activity concentrations of {sup 210}Pb and {sup 210}Po were decay corrected to the sampling date, accounting for the possible in-growth and decay of {sup 210}Po. {sup 210}Po activity concentrations in oysters were in a range from 41.3 to 206 Bq·(kg-ww{sup -1} and mussels in a range from 42.9 to 46.7 Bq·(kg-ww){sup -1}. The {sup 210}Po activity concentration of oysters in the turbid Western coast was higher than the Southern coast. The {sup 210}Po activity concentration of the oysters was positively correlated (R2=0.89) with those of the suspended particulate matter in the surface water. The calculated annual effective dose of {sup 210}Po from oysters and mussels consumed by the Korean population was 21-104 and 5.01-5.46 μSv·y{sup -1}. The combined effective dose due to the consumption of oysters and mussels appears to account for about 35±19% of that arising from seafood consumption in the Korean population. The annual effective dose of {sup 210}Po for oysters in the Korean population was found to be higher than other countries. The total annual effective dose of 210Po{sup 210}Po due to consumption of oysters and mussels consumed in Korea was found to be 76±42 μSv·y{sup -1}, accounting for 28±16% of the total effective dose of {sup 210}Po from food in Korea.

  10. The low temperature heat capacity of LaPO{sub 4} and GdPO{sub 4}, the thermodynamic functions of the monazite-type LnPO{sub 4} series

    Energy Technology Data Exchange (ETDEWEB)

    Thiriet, C. [European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe (Germany)]. E-mail: catherine.thiriet@itu.fzk.de; Konings, R.J.M. [European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe (Germany)]. E-mail: konings@itu.fzk.de; Javorsky, P. [European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe (Germany)]. E-mail: javor@met.mff.cuni.cz; Magnani, N. [I.N.F.M. and University of Parma, Parco Area delle Scienze 7/A, I-43100 Parma (Italy)]. E-mail: magnani@fis.unipr.it; Wastin, F. [European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe (Germany)]. E-mail: wastin@itu.fzk.de

    2005-02-01

    The heat capacity of lanthanum and gadolinium orthophosphate (LaPO{sub 4} and GdPO{sub 4}) with monazite-like structure (i.e., monoclinic) was measured by hybrid adiabatic relaxation calorimetry in the temperature ranges (2 to 380) K and (0.5 to 301) K respectively. A semi-empirical method has been used to describe the total specific heat as the sum of a lattice and an excess component. An excess contribution due to magnetic effects was observed for GdPO{sub 4} below T = 12 K and it was found that GdPO{sub 4} orders magnetically below 0.8 K. Combining the results obtained for both compounds, the excess heat capacity for CePO{sub 4} was deduced and compared to the excess heat capacity derived from the crystal-field energies. A good agreement has been found between the experimental heat capacity and the calculated one. The thermodynamic functions of the monazite-type LnPO{sub 4} series were determined.

  11. A metáfora viva em Quintana

    OpenAIRE

    2009-01-01

    Essa dissertação tem como base de estudo a obra completa de Mário Quintana, com a proposta de estudar a linguagem metafórica e mostrar traços surrealistas que acentuam em vários textos dela. Será mostrado que Quintana com seu lirismo, aliado à fina ironia e autenticidade ímpar, construiu um discurso poético despido de artificialismos. Escritor moderno, ele fez questão de anunciar seu desejo de permanecer livre dos rótulos literários, não se apegou a modismos e não aceitou ser ...

  12. Scintillation properties of rare-earth doped NaPO3-Al(PO3)3 glasses

    Science.gov (United States)

    Kuro, Tomoaki; Okada, Go; Kawaguchi, Noriaki; Fujimoto, Yutaka; Masai, Hirokazu; Yanagida, Takayuki

    2016-12-01

    We systematically investigated photoluminescence (PL), scintillation and dosimeter properties of rare-earth (RE) doped NaPO3-Al(PO3)3 (NAP) glasses. The NAP glasses doped with a series of RE ions (La-Yb, except Pm) with a consistent concentration (0.3 wt%) were prepared by the conventional melt-quenching method. The PL and scintillation decay time profiles showed fast (ns) and slow (μs or ms) components: the fast components from 15 to 100 ns were due to the host or 5d-4f transition emission, and the slow components from 15 μs to 5 ms were due to the 4f-4f transitions of RE. The thermally stimulated luminescence (TSL) was evaluated as a dosimeter property, and glow peaks appeared around 400 °C in all the samples. The TSL dose response function was examined in the dose range from 10 mGy to 10 Gy. Among the samples tested, Nd and Tb doped glasses showed higher signal by at least one order of magnitude than those of non-doped and other RE-doped samples. Over the dose range tested, the TSL signals are linearly related with the incident X-ray dose, showing a potential for practical applications.

  13. Important Variation in Vibrational Properties of LiFePO4 and FePO4 Induced by Magnetism

    Science.gov (United States)

    Seifitokaldani, Ali; Gheribi, Aïmen E.; Phan, Anh Thu; Chartrand, Patrice; Dollé, Mickaël

    2016-09-01

    A new thermodynamically self-consistent (TSC) method, based on the quasi-harmonic approximation (QHA), is used to obtain the Debye temperatures of LiFePO4 (LFP) and FePO4 (FP) from available experimental specific heat capacities for a wide temperature range. The calculated Debye temperatures show an interesting critical and peculiar behavior so that a steep increase in the Debye temperatures is observed by increasing the temperature. This critical behavior is fitted by the critical function and the adjusted critical temperatures are very close to the magnetic phase transition temperatures in LFP and FP. Hence, the critical behavior of the Debye temperatures is correlated with the magnetic phase transitions in these compounds. Our first-principle calculations support our conjecture that the change in electronic structures, i.e. electron density of state and electron localization function, and consequently the change in thermophysical properties due to the magnetic transition may be the reason for the observation of this peculiar behavior of the Debye temperatures.

  14. Important Variation in Vibrational Properties of LiFePO4 and FePO4 Induced by Magnetism

    Science.gov (United States)

    Seifitokaldani, Ali; Gheribi, Aïmen E.; Phan, Anh Thu; Chartrand, Patrice; Dollé, Mickaël

    2016-01-01

    A new thermodynamically self-consistent (TSC) method, based on the quasi-harmonic approximation (QHA), is used to obtain the Debye temperatures of LiFePO4 (LFP) and FePO4 (FP) from available experimental specific heat capacities for a wide temperature range. The calculated Debye temperatures show an interesting critical and peculiar behavior so that a steep increase in the Debye temperatures is observed by increasing the temperature. This critical behavior is fitted by the critical function and the adjusted critical temperatures are very close to the magnetic phase transition temperatures in LFP and FP. Hence, the critical behavior of the Debye temperatures is correlated with the magnetic phase transitions in these compounds. Our first-principle calculations support our conjecture that the change in electronic structures, i.e. electron density of state and electron localization function, and consequently the change in thermophysical properties due to the magnetic transition may be the reason for the observation of this peculiar behavior of the Debye temperatures. PMID:27604551

  15. EM International. Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    1993-07-01

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

  16. Chemical characterization of springtime submicrometer aerosol in Po Valley, Italy

    Directory of Open Access Journals (Sweden)

    S. Saarikoski

    2012-03-01

    Full Text Available The chemistry of submicron particles was investigated at San Pietro Capofiume (SPC measurement station in the Po Valley, Italy, in spring 2008. The measurements were performed by using both off-line and on-line instruments. Organic carbon (OC and elemental carbon, organic acids and biomass burning tracers were measured off-line by using a 24-h PM1 filter sampling. More detailed particle chemistry was achieved by using an Aerodyne high resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS and analyzing the data by positive matrix factorization (PMF. Oxalic acid had the highest concentrations of organic acids (campaign-average 97.4 ng m−3 followed by methane sulfonic, formic, malonic, and malic acids. Samples were also analyzed for glyoxylic, succinic, azelaic and maleic acids. In total, the nine acids composed 1.9 and 3.8% of OC and water-soluble OC, respectively (average, in terms of carbon atoms. Levoglucosan concentration varied from 17.7 to 495 ng m−3 with the concentration decreasing in the course of the campaign most likely due to the reduced use of domestic heating with wood. Six factors were found for organic aerosol (OA at SPC by PMF: hydrocarbon-like OA (HOA, biomass burning OA (BBOA, nitrogen-containing OA (N-OA and three different oxygenated OAs (OOA-a, OOA-b and OOA-c. Most of the OA mass was composed of OOA-a, HOA and OOA-c (26, 24 and 22%, respectively followed by OOA-b (13%, BBOA (8% and N-OA (7%. As expected, OOAs were the most oxygenated factors with organic matter:organic carbon (OM:OC ratios ranging from 1.9 to 2.2. The diurnal variability of the aerosol chemical composition was greatly affected by the boundary layer meteorology. Specifically, the effect of the nocturnal layer break-up in morning hours was most evident for nitrate and N-OA indicating that these compounds originated mainly from the local sources in the Po Valley. For sulfate and OOA-a the concentration did not

  17. Chemical characterization of springtime submicrometer aerosol in Po Valley, Italy

    Directory of Open Access Journals (Sweden)

    S. Saarikoski

    2012-09-01

    Full Text Available The chemistry of submicron particles was investigated at San Pietro Capofiume (SPC measurement station in the Po Valley, Italy, in spring 2008. The measurements were performed by using both off-line and on-line instruments. Organic carbon (OC and elemental carbon, organic acids and biomass burning tracers were measured off-line by using a 24-h PM1 filter sampling. More detailed particle chemistry was achieved by using a Aerodyne high resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS and analyzing the data by positive matrix factorization (PMF. Oxalic acid had the highest concentrations of organic acids (campaign-average 97.4 ng m−3 followed by methane sulfonic, formic, malonic, and malic acids. Samples were also analyzed for glyoxylic, succinic, azelaic and maleic acids. In total, the nine acids composed 1.9 and 3.8% of OC and water-soluble OC, respectively (average, in terms of carbon atoms. Levoglucosan concentration varied from 17.7 to 495 ng m−3 with the concentration decreasing in the course of the campaign most likely due to the reduced use of domestic heating with wood. Six factors were found for organic aerosol (OA at SPC by PMF: hydrocarbon-like OA (HOA, biomass burning OA (BBOA, nitrogen-containing OA (N-OA and three different oxygenated OAs (OOA-a, OOA-b and OOA-c. Most of the OA mass was composed of OOA-a, HOA and OOA-c (26, 24 and 22%, respectively followed by OOA-b (13%, BBOA (8% and N-OA (7%. As expected, OOAs were the most oxygenated factors with organic matter:organic carbon (OM : OC ratios ranging from 1.9 to 2.2. The diurnal variability of the aerosol chemical composition was greatly affected by the boundary layer meteorology. Specifically, the effect of the nocturnal layer break-up in morning hours was most evident for nitrate and N-OA indicating that these compounds originated mainly from the local sources in the Po Valley. For sulfate and OOA-a the concentration did not

  18. Desnutrição cálcica em milheto em condições de campo

    OpenAIRE

    França,A.F.S.; Ventura,C.A.O.; H. P. Haag

    1985-01-01

    Em uma plantação de milheto forrageiro, cultivar Bulk 1 localizada sobre um Latossolo Vermelho Escuro Orto, série "Luiz de Queiroz" no Campus da E.S.A. "Luiz de Queiroz", USP, foram observados na parte final do ciclo vegetativo intensos sintomas de deficiência de cálcio. No intuito de identificar as causas, amostras de terras foram coletadas nas áreas com plantas apresentando sintomas e analisadas para fins de fertilidade. Plantas foram coletadas de ambas as áreas e analisadas para cálcio, po...

  19. Microsatellite Loci in the Gypsophyte <em>Lepidium subulatum em>(Brassicaceae, and Transferability to Other <em>Lepidieae>

    Directory of Open Access Journals (Sweden)

    José Gabriel Segarra-Moragues

    2012-09-01

    Full Text Available Polymorphic microsatellite markers were developed for the Ibero-North African, strict gypsophyte <em>Lepidium subulatumem> to unravel the effects of habitat fragmentation in levels of genetic diversity, genetic structure and gene flow among its populations. Using 454 pyrosequencing 12 microsatellite loci including di- and tri-nucleotide repeats were characterized in <em>L. subulatumem>. They amplified a total of 80 alleles (2–12 alleles per locus in a sample of 35 individuals of <em>L. subulatumem>, showing relatively high levels of genetic diversity, <em>H>O = 0.645, <em>H>E = 0.627. Cross-species transferability of all 12 loci was successful for the Iberian endemics <em>Lepidium cardaminesem>, <em>Lepidium stylatumem>, and the widespread, <em>Lepidium graminifoliumem> and one species each of two related genera, <em>Cardaria drabaem> and <em>Coronopus didymusem>. These microsatellite primers will be useful to investigate genetic diversity, population structure and to address conservation genetics in species of <em>Lepidium>.

  20. Baseline concentration of {sup 210}Po in Sargassum from the Northern Gulf

    Energy Technology Data Exchange (ETDEWEB)

    Uddin, S.; Bebhehani, M.; Talebi, L. [Kuwait Institute for Scientific Research (Kuwait)

    2014-07-01

    The concentration of the {sup 210}Po is of enormous interest because of its large contribution to the natural radiation dose received by marine organisms and human populations consuming seafood. In fact natural {sup 210}Po is responsible for higher radiation doses to humans consuming marine products than is plutonium and other man-made radionuclides. Many marine organisms are capable of concentrating {sup 210}Po in their tissues. {sup 210}Po is an alpha emitter in the {sup 238}U series, with 138-d half-life, that is supplied to seawater from atmospheric inputs and river runoff, however, the main source of {sup 210}Po in the environment is {sup 222}Rn exhalation from the ground. Assessing the impact of radionuclides in the environment requires the establishment of baseline levels in the environmental compartments. The objective of this study was to establish baseline levels in Sargassum. Two most common species of Sargassum found in the northern Gulf were analysed for {sup 210}Po. These macro-algae were collected from three different locations during January 2013. This study sets the baseline for {sup 210}Po concentration in northern Gulf, {sup 210}Po is absorbed from water and concentrated by Phytoplankton and macro-algae. This concentrated {sup 210}Po can then be passed along to the next trophic level of the marine food web. The {sup 210}Po concentration measured in Sargassum boveanum (4.405 - 4.952 BqKg{sup -1}) was significantly higher (p>0.084) than Sargassum oligocystum (3.838 - 4.358 BqKg{sup -1}). The {sup 210}Po concentration in these seaweeds from the Arabian/Persian Gulf were substantially lower than those found in various Phytoplankton and macro-algae species from other regions; this may be due to the lower background {sup 210}Po concentration in the Kuwait marine waters (0.282 - 0.382 mBq l{sup -1}). The {sup 210}Po concentrations in seawater measured at the 3 stations during January 2013 were less than those reported previously from the same region

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

    Directory of Open Access Journals (Sweden)

    Núbia Boechat

    2012-07-01

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

  2. Tools for Scientist Engagement in E/PO: NASA SMD Community Workspace and Online Resources

    Science.gov (United States)

    Dalton, H.; Shipp, S. S.; Grier, J.; Gross, N. A.; Buxner, S.; Bartolone, L.; Peticolas, L. M.; Woroner, M.; Schwerin, T. G.

    2014-12-01

    The Science Mission Directorate (SMD) Science Education and Public Outreach (E/PO) Forums are here to help you get involved in E/PO! The Forums have been developing several online resources to support scientists who are - or who are interested in becoming - involved in E/PO. These include NASA Wavelength, EarthSpace, and the SMD E/PO online community workspace. NASA Wavelength is the one-stop shop of all peer-reviewed NASA education resources to find materials you - or your audiences - can use. Browse by audience (pre-K through 12, higher education, and informal education) or topic, or choose to search for something specific by keyword and audience. http://nasawavelength.org. EarthSpace, an online clearinghouse of Earth and space materials for use in the higher education classroom, is driven by a powerful search engine that allows you to browse the collection of resources by science topic, audience, type of material or key terms. All materials are peer-reviewed before posting, and because all submissions receive a digital object identifier (doi), submitted materials can be listed as publications. http://www.lpi.usra.edu/earthspace. The SMD E/PO online community workspace contains many resources for scientists. These include one-page guides on how to get involved, tips on how to make the most of your time spent on E/PO, and sample activities, as well as news on funding, policy, and what's happening in the E/PO community. The workspace also provides scientists and the public pathways to find opportunities for participation in E/PO, to learn about SMD E/PO projects and their impacts, to connect with SMD E/PO practitioners, and to explore resources to improve professional E/PO practice, including literature reviews, information about the Next Generation Science Standards, and best practices in evaluation and engaging diverse audiences. http://smdepo.org.

  3. [Immobilization technology and mechanism of fly ash using H3PO4].

    Science.gov (United States)

    Wang, Jun; Jiang, Jian-Guo; Sui, Ji-Chao; Yang, Shi-Jian

    2006-08-01

    Chemical composition and toxicity leaching characteristics of fly ash was analyzed. The experiment results show that many heavy metals were contained; leaching concentration of Pb is 67.03 mg/L, which exceeds the limit of identification standard for hazardous wastes. Effect of input mass of H3PO4 on immobilization of heavy metals and its long-term environmental stability was studied. The results show that when input 8% - 14% (H3PO4 mass/ fly ash mass) of H3PO4 sound immobilization effect can be achieved; 8% and 12% of H3PO4 will bring a satisfactory environmental stability of heavy metals, while more H3PO4 led to less buffer capacity to acid conditions. In fly ash treated by 12% H3PO4, a small quantity of crystal Cr2P2O7, ZnP2, Pb3P4O13, Pb3P2O7, NaZnPO4, NaPbP3O9, Ca2ZnSi2O7 can be detected by XRD; many independent fly ash particles and bar-shaped Pb5 (PO4)3Cl with a diameter of 0.3 - 0.5 microm were observed by SEM; concentrated heavy metal materials were not obtained by CHBr3 floatation. Conclusions can be drawn that, through neutralization reaction of H3PO4 with strongly alkaline fly ash, stabilization reaction conditions were improved, entrapped heavy metals were chemically activated and PO4(3-) needed in stabilization was produced. Activated heavy metals combined with PO4(3-) on surface of fly ash,generated phosphates existing as forms of solid solution in SiO2, CaCO3, CaSO4, KCl, NaCl.

  4. Crystal and magnetic structures of electrochemically delithiated Li 1- xCoPO 4 phases

    Science.gov (United States)

    Ehrenberg, Helmut; Bramnik, Natalia N.; Senyshyn, Anatoliy; Fuess, Hartmut

    2009-01-01

    Precise structural data have been determined from a combined Rietveld refinement, based on neutron and X-ray powder diffraction data simultaneously, for the three phases LiCoPO 4, Li zCoPO 4 with a specific intermediate Li-content z = 0.60(10) and CoPO 4, which are obtained by electrochemical Li-extraction from LiCoPO 4. All three phases are isopointal. Therefore, the transitions between these phases are necessarily of first order, in agreement with their observed coexistence. The same collinear antiferromagnetic structures with magnetic moments nearly parallel to the [010] direction are observed for LiCoPO 4 and Li zCoPO 4, but with a significantly higher Néel temperature of 76 K for the latter compound in comparison with 23 K for LiCoPO 4. Olivine-type CoPO 4 can only be prepared from LiCoPO 4 by delithiation and its physical properties were investigated for the first time. An antiferromagnetic arrangement along the [100] direction is observed for CoPO 4 with an additional weak ferromagnetic component along the [001] direction (magnetic space group Pn' m' a and TC = 45 K). The magnetic moment of 3.1(2) μ B per Co-ion indicates a mainly high-spin state for Co 3+ in the octahedral coordination of CoPO 4, which is exceptional and probably the first example in a phosphate. The easy axes and the magnetic exchange interactions between Co-ions change dramatically with the Co 2+ ↔ Co 3+ transition. A continuous change of the formal oxidation state of a transition element by electrochemical Li-extraction and a quasi-continuous in situ observation of the resulting magnetic structure by neutron diffraction appear feasible.

  5. LiFePO4/Ni复合微球的制备%Preparation of LiFePO4/Ni composite microspheres

    Institute of Scientific and Technical Information of China (English)

    景茂祥; 沈湘黔; 蔡一湘

    2010-01-01

    通过控制反应沉淀-柠檬酸盐凝胶法,经还原热处理制得LiFePO4/Ni复合微球材料,并采用扫描电子显微镜、能谱分析、X射线衍射等手段研究了前驱体和焙烧产物的成分、微观结构及形貌.结果表明:实验制备的LiFePO4/Ni复合材料由LiFePO4和金属Ni两相组成,且保持了球形形貌、具有相对致密的结构,金属镍均匀分布于LiFePO4微球表面.

  6. LiFePO4/CNT复合正极材料的性能%The performance of LiFePO4/CNT composite cathode material

    Institute of Scientific and Technical Information of China (English)

    罗绍华; 田勇; 唐子龙; 惠乐

    2009-01-01

    以柠檬酸为碳源和螯合剂,通过溶胶-凝胶法制备了LiFePO4/碳纳米管(CNT)复合正极材料.XRD和SEM分析表明,材料含有单一的LiFePO4相;CNT将颗粒连接起来,提供了附加的导电通路.以0.2 C、1.0 C和2.0 C充放电,向0.03 mol LiFePO4中加入0.05 g CNT的LiFePO4/CNT材料的比容量分别为135 mAh/g、110 mAh/g和80 mAh/g.

  7. Identification of proteases produced by entomopathogenic fungi Beauveria bassiana (Bals Vuill. strain CG432 previously activated in coffee berry borer alive (Hypothenemus hampeiIdentificação de proteases produzidas pelo fungo entomopatogênico Beauveria bassiana (Bals Vuill. Cepa CG432 previamente ativada em insetos vivos de broca do café ((Hypothenemus hampei

    Directory of Open Access Journals (Sweden)

    Luiz Filipe Protásio Pereira

    2012-02-01

    Full Text Available Conídios de fungos entomopatogênicos atravessam o exoesqueleto do inseto pela ação mecânica do tubo germinativo e produção de múltiplas isoformas de proteases, quitinases e lipases em resposta à composição da cutícula do inseto. Desta forma o objetivo deste trabalho foi extrair, purificar e caracterizar a estrutura de proteases produzidas em cultivo submerso por Beauveria bassiana CG432 previamente ativada em adultos vivos de broca-do-café (Hypothenemus hampei. Uma suspensão contendo 106 conídios ativados/mL foi inoculada em meio de cultura líquido a 28ºC, 150 rpm por 3 dias. O extrato de proteases (EP foi obtido da centrifugação a 8000 g por 20 minutos, fracionado e concentrado por ultrafiltração em membrana de porosidade controlada 100 kDa e 3 kDa, respectivamente. A cromatografia de gel filtração em Sephadex G-100 separou um pico proteico (Pico II que apresentou 56% de resíduos do aminoácido ácido aspártico quando analisado por HPLC em coluna de fase reversa ODS-C18; atividade específica 43 vezes superior ao EP sobre soro albumina bovina; atividade de protease tipo-subtilisina e uma única banda proteica revelada por nitrato de prata e Coomassie Brilhant Blue em zimograma sobre gelatina por eletroforese PAGE em condições nativas. A homogeneidade do Pico II foi confirmada pela revelação de uma única banda durante a determinação do pH isoelétrico igual a 4,5, porém a determinação da massa molecular separou 2 bandas de 23 e 26 kDa por eletroforese PAGE-2D. As proteases foram caracterizadas como serino proteases com resíduo cisteína importante para a atividade, pois foram inibidas por fluoreto fenil-metil-sufonil e ácido p-cloromercúriobenzóico. As proteases do Pico II apresentaram Km 4x10-4 sobre substrato tipo-subtilisina.

  8. Magnetic phase diagram of magnetoelectric LiMnPO4

    DEFF Research Database (Denmark)

    Toft-Petersen, Rasmus; Andersen, Niels Hessel; Li, Haifeng;

    2012-01-01

    . At the bicritical field, we observe an increased intensity of the Lorentz broadened elastic scattering at magnetic Bragg peaks above TN as compared to zero field and 10 T, without an increase in peak width. This suggests an increased density of fluctuations at the bicritical field as compared to zero field.......The nature of the spin-flop (SF) transition in the magnetoelectric quasi-2D Heisenberg system LiMnPO4 is studied in fields applied along the a axis. A refinement of the magnetic structure using neutron diffraction data in the SF phase reveals that the spins reorient from being parallel...... to the a axis to be nearly along the c axis at magnetic fields between 4 and 4.7 T, depending on temperature. The low-field antiferromagnetic phase boundary is shown to join the spin-flop line tangentially at the so-called bicritical point, where there is a suppression of the ordering temperature...

  9. Principles of failure probability assessment (PoF)

    Energy Technology Data Exchange (ETDEWEB)

    Giribone, R.; Pocachard, M.

    2003-07-01

    The aim of this paper is to offer some methodological guidance for assessing the probability of getting a failure (PoF) in an item subject to a continuous degradation mechanism and systematic inspection program. It is to be emphasised that this is not the final result of probability assessment: as a matter of fact, given a failure of a certain type, there is not a one to one correspondence between the probability of occurrence of a failure and the probability of having a certain harm of a given intensity. Between the two, there is a need to consider various accidental scenarios, each occurring with a given probability. The final outcome is the product of these two probabilities. (orig.)

  10. Ricardo Piglia, una poética de la reescritura

    Directory of Open Access Journals (Sweden)

    Julia Graciela Romero

    2009-11-01

    Full Text Available El trabajo constituye una primera aproximación a los manuscritos de Prisión perpetua, la consideración de un archivo futuro y las reflexiones teóricas y críticas que suscita ese acontecimiento. Se postula, además, la figuración de una poética basada en el mecanismo de la reescritura y en especial de un tipo de reescritura que denominamos aquí la 'estrategia de Menard', donde las recontextualizaciones de la propia obra conforman un sistema de rentabilidad narrativa que confluye en la multiplicación en el nivel de la producción textual

  11. PO*WW*ER mobile treatment unit process hazards analysis

    Energy Technology Data Exchange (ETDEWEB)

    Richardson, R.B.

    1996-06-01

    The objective of this report is to demonstrate that a thorough assessment of the risks associated with the operation of the Rust Geotech patented PO*WW*ER mobile treatment unit (MTU) has been performed and documented. The MTU was developed to treat aqueous mixed wastes at the US Department of Energy (DOE) Albuquerque Operations Office sites. The MTU uses evaporation to separate organics and water from radionuclides and solids, and catalytic oxidation to convert the hazardous into byproducts. This process hazards analysis evaluated a number of accident scenarios not directly related to the operation of the MTU, such as natural phenomena damage and mishandling of chemical containers. Worst case accident scenarios were further evaluated to determine the risk potential to the MTU and to workers, the public, and the environment. The overall risk to any group from operation of the MTU was determined to be very low; the MTU is classified as a Radiological Facility with low hazards.

  12. Comparison of LiFePO4 from different sources

    Energy Technology Data Exchange (ETDEWEB)

    Striebel, Kathryn; Shim, Joongpyo; Srinivasan, Venkat; Newman, John

    2004-06-21

    The lithium iron phosphate chemistry is plagued by the poor conductivity and slow diffusion in the solid phase. In order to alleviate these problems, various research groups have adopted different strategies including decreasing the particle sizes, increasing the carbon content, and adding dopants. In this study, we obtained LiFePO{sub 4} powders and/or electrodes from six different sources and used a combined model-experimental approach to compare the performance. Samples ranged from 0.4% to 15% ''in-situ'' carbon. In addition, particle sizes varied by as much as an order of magnitude between samples. The study detailed in this manuscript allows us to provide insight into the relative importance of the conductivity of the samples compared to the particle size, the impact of having a distribution in particle sizes, and ideas for making materials in order to maximize the power capability of this chemistry.

  13. Comparison of LiFePO4 from different sources

    Energy Technology Data Exchange (ETDEWEB)

    Striebel, Kathryn; Shim, Joongpyo; Srinivasan, Venkat; Newman, John

    2003-11-25

    The lithium iron phosphate chemistry is plagued by the poor conductivity and slow lithium diffusion in the solid phase. In order to alleviate these problems, various research groups have adopted different strategies including decreasing the particle sizes, increasing the carbon content, and adding dopants. In this study we obtained LiFePO4 electrodes from six different sources and used a combined model-experimental approach to compare the performance. Samples ranged from one with no carbon coating to one with 15 percent coating. In addition, particle sizes varied by as much as a order of magnitude between samples. The study detailed in this manuscript allows us to provide insight into the relative importance of the conductivity of the samples compared to the particle size, the impact of dopant on performance and ideas for making materials in order to maximize the power capability of this chemistry.

  14. Corpes: Historia poética de una afrenta

    OpenAIRE

    Martínez, Salvador; Angelo State University San Angelo, Texas

    2013-01-01

    En el examen del juicio de la historia sobre el episodio de Corpes, núcleo de la tercera parte del Cantar de Mío Cid, pudiera uno servirse de aquella división tripartita que don Ramón Menéndez Pidal empleó al trazar la entera biografía del Cid: biógrafos primitivos; historia y fábula confundidas; discusiones benedictinas. Á estos tres períodos deberá añadirse naturalmente un cuarto, que llamaremos historia poética de una afrenta.Título que —supongo— hubiera complacido a don Ramón, por refleja...

  15. Structure and electrochemistry of NaFePO{sub 4} and Na{sub 2}FePO{sub 4}F cathode materials prepared via mechanochemical route

    Energy Technology Data Exchange (ETDEWEB)

    Kosova, N.V., E-mail: kosova@solid.nsc.ru [Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze, 630128 Novosibirsk (Russian Federation); Novosibirsk State University, 2 Pirogova, 630090 Novosibirsk (Russian Federation); Podugolnikov, V.R.; Devyatkina, E.T. [Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze, 630128 Novosibirsk (Russian Federation); Slobodyuk, A.B. [Institute of Chemistry FEB RAS, 159 Stoletiya Vladivostoka, 690022 Vladivostok (Russian Federation)

    2014-12-15

    Highlights: • Na{sub 2}FePO{sub 4}F is prepared by mechanochemically assisted solid state synthesis. • The crystal and local structure are studied by XRPD, FTIR, Mössbauer, and NMR. • Na{sup +}/Li{sup +} ion exchange is completed with the formation of NaLiFePO{sub 4}F. • The average D{sub Li} (10{sup −15} cm{sup 2} s{sup −1}) is determined from GITT measurements. - Abstract: Nanostructured NaFePO{sub 4} (space group Pmnb) and Na{sub 2}FePO{sub 4}F (space group Pbcn) were prepared by a quick and facile mechanochemically assisted solid state synthesis. Low-crystalline Na{sub 2}FePO{sub 4}F was formed as a result of direct mechanochemical reaction of NaFePO{sub 4} with NaF. It crystallizes upon subsequent heating to 600 °C and decomposes at higher temperatures. Crystal and local structure were analyzed by XRD using Rietveld refinement, FTIR, Mössbauer, and NMR spectroscopy. Electrochemical properties were studied by galvanostatic cycling in lithium cells and GITT. Although NaFePO{sub 4} showed some electrochemical activity, neither electrochemical nor chemical Na{sup +}/Li{sup +} exchange was observed by XRD. On contrary, electrochemical and chemical Na{sup +}/Li{sup +} ion exchange occurred in the case of Na{sub 2}FePO{sub 4}F and accomplished with the NaLiFePO{sub 4}F formation. Li{sup +} diffusion coefficient in NaLiFePO{sub 4}F at different delithiated/lithiated states was determined from GITT. Carbon-coated Na{sub 2}FePO{sub 4}F shows discharge capacity of 116 mA h g{sup −1} at 0.1 C rate within the 2.0–4.2 V voltage range and a good cyclability.

  16. CENTRO DE FORMAÇÃO DE RECURSOS HUMANOS EM TRANSPORTES URBANOS - CEFTRU

    OpenAIRE

    Jose Augusto Abreu Sá Fortes

    2010-01-01

    <p>O presente trabalho irá apresentar questões referentes a criação do Centro de Formação de Recursos Humanos em Transportes Urbanos - CEFTRU. Tal Centro é um projeto bilateral entre os governos brasileiro e japonês, de iniciativa do Mestrado em Transportes Urbanos da Universidade de Brasília (UnB), sob os auspícios de Ministério das Relações Exteriores - Agencia Brasileira de Cooperação - MRE/ABC e da Japan International Cooperation Agency - JICA. O projeto visa a constituição e a post...

  17. Nucleation and growth of new particles in Po Valley, Italy

    Directory of Open Access Journals (Sweden)

    A. Hamed

    2007-01-01

    Full Text Available Aerosol number distribution measurements are reported at San Pietro Capofiume (SPC station (44°39' N, 11°37' E for the time period 2002–2005. The station is located in Po Valley, the largest industrial, trading and agricultural area in Italy with a high population density. New particle formation was studied based on observations of the particle size distribution, meteorological and gas phase parameters. The nucleation events were classified according to the event clarity based on the particle number concentrations, and the particle formation and growth rates. Out of a total of 769 operational days from 2002 to 2005 clear events were detected on 36% of the days whilst 33% are clearly non-event days. The event frequency was high during spring and summer months with maximum values in May and July, whereas lower frequency was observed in winter and autumn months. The average particle formation and growth rates were estimated as ~6 cm−3 s−1 and ~7 nm h−1, respectively. Such high growth and formation rates are typical for polluted areas. Temperature, wind speed, solar radiation, SO2 and O3 concentrations were on average higher on nucleation days than on non-event days, whereas relative and absolute humidity and NO2 concentration were lower; however, seasonal differences were observed. Backtrajectory analysis suggests that during majority of nucleation event days, the air masses originate from northern to eastern directions. We also study previously developed nucleation event correlations with environmental variables and show that they predict Po Valley nucleation events with variable success.

  18. Screening and Analysis of the Potential Bioactive Components in Rabbit Plasma after Oral Administration of Hot-Water Extracts from Leaves of <em>B>ambusa em>>textilis em>McClure

    Directory of Open Access Journals (Sweden)

    Jia Sun

    2012-07-01

    Full Text Available <em>Bambusa textilisem> McClure is a traditional Chinese medicinal plant belonging to the Bambusoideae subfamily and used to treat chronic fever and infectious diseases. To investigate the bioactive compounds absorbed in the rabbit blood after oral administration of hot-<em>water extractem>>s from em>>the leaves of em>>B. textilisem> McClure, a validated chromatographic fingerprint method was established using LC-Q-TOF-MS. Twenty compounds in bamboo leaves and three potential bioactive compounds in rabbit plasma were detected. Of the twenty detected compounds <em>in vitroem>, fifteen of which were tentatively identified either by comparing the retention time and mass spectrometry data with that of reference compounds or by reviewing the literature. Three potential bioactive compounds, including (<em>E-p>-coumaric acid, (<em>Z-p>-coumaric acid, and apigenin-8-<em>C>-β-D-(2"-<em>O>-α-L-rhamnosyl-gluco-pyranoside, were detected in both <em>the leaves of em>>B. textilis em>McClure and rabbit plasma. Of the three compounds, apigenin-8-<em>C>-β-D-(2"-<em>O>-α-L-rhamnosylglucopyranoside was identified based on its UV, MS, and NMR spectra. This study provides helpful chemical information for further pharmacology and active mechanism research on <em>B. textilisem> McClure.

  19. In vitro morphogenesis and cell suspension culture establishment in Piper solmsianum C. DC. (Piperaceae Morfogênese in vitro e estabelecimento de culturas de suspensão celular em Piper solmsianum C. DC. (Piperaceae

    Directory of Open Access Journals (Sweden)

    Tiago Santana Balbuena

    2009-03-01

    Full Text Available Piper solmsianum is a shrub from Southeast Brazil in which many biologically active compounds were identified. The aim of this work was to establish a cell suspension culture system for this species. With this in mind, petiole and leaf explants obtained from in vitro plantlets were cultured in the presence of different plant growth regulator combinations (IAA, NAA, 2,4-D and BA. Root and indirect shoot adventitious formation, detected by histological analysis, was observed. Besides the different combinations of plant growth regulators, light regime and the supplement of activated charcoal (1.5 mg.l-1 were tested for callus induction and growth. Cultures maintained in light, on a 0.2 mg.l-1 2,4-D and 2 mg.l-1 BA supplemented medium, and in the absence of activated charcoal, showed the highest calli fresh matter increment. From a callus culture, cell suspension cultures were established and their growth and metabolite accumulation studied. The achieved results may be useful for further characterization of the activated secondary metabolites pathways in in vitro systems of P. solmsianum.Piper solmsianum é uma espécie herbácea do sudeste brasileiro onde vários compostos biologicamente ativos já foram identificados. O objetivo deste trabalho foi estabelecer suspensões celulares nesta espécie. Para tanto, foram utilizados explantes de pecíolos e folhas, retirados de plântulas cultivadas in vitro, os quais foram submetidos a diferentes combinações de reguladores de crescimento (AIA, ANA, 2,4-D e BAP. Foi obtida a neo-formação de raízes e brotos, estes últimos através do processo de organogênese indireta evidenciada por estudos histológicos. Para a indução e crescimento dos calos, foram avaliados, além das diferentes combinações de reguladores de crescimento, a suplementação ao meio de cultura de carvão ativado (1,5 mg.l-1 e o regime de luz. Culturas mantidas na luz, em meio de cultura suplementado com 0,2 mg.l-1 2,4-D e 2 mg

  20. Giangiorgio Trissino, poète de l’empereur

    Directory of Open Access Journals (Sweden)

    Mercedes Blanco

    2012-06-01

    Full Text Available Cet article porte sur l’une des célébrités les plus méconnues de la Renaissance italienne, Giangiorgio Trissino (1478-1550 auteur d’un poème dédié à Charles-Quint, L’Italia liberata dai Goti (1547-1548, qui pose les bases d’un nouveau genre épique cultivé par des poètes de la seconde moitié du XVIe siècle, en Italie et en Espagne. Nous montrons que Trissino est un « poète de l’empereur » dans ses choix en tant que lettré, en tant qu’auteur de L’Italia liberata, et, à la fin de sa vie, lorsqu’il cherche la protection de Charles-Quint comme un asile, dès lors qu’il est amené par une tragédie familiale à rompre ses attaches avec Vicence, ville natale d’où il tenait sa fortune et son rang seigneurial. Le néo-classicisme d’un poème empreint de dévotion pour Homère se prête à l’expression de positions politiques et religieuses fort différentes de celles qui se généraliseront en Italie un peu plus tard, sous l’influence de la Contre-réforme. Charles-Quint se trouve au cœur de cette entreprise poétique. Trissino, suivant Aristote et s’inspirant de Virgile, réduit en fable une partie de la campagne ordonnée par Justinien pour conquérir l’Italie tenue par les Goths. Ainsi modifié, le matériau historique prend sens par l’allusion au rôle présumé libérateur de Charles-Quint en Italie.Este artículo trata de uno de los escritores más célebres y peor tratados por la crítica del Renacimiento italiano, Giangiorgio Trissino (1478-1550, autor de un poema épico dedicado a Carlos V, L’Italia liberata dai Goti (1547-1548, obra fundacional de un nuevo género heroico, cultivado por los poetas de la segunda mitad del XVI, en Italia y en España. Sostenemos que Trissino puede ser tenido por « poeta del emperador » a la vez en sus audaces posturas como hombre de letras e intelectual, en cuanto autor de L’Italia liberata y, al final de su vida, cuando buscó el amparo del emperador

  1. Rate-dependent, Li-ion insertion/deinsertion behavior of LiFePO4 cathodes in commercial 18650 LiFePO4 cells.

    Science.gov (United States)

    Liu, Qi; He, Hao; Li, Zhe-Fei; Liu, Yadong; Ren, Yang; Lu, Wenquan; Lu, Jun; Stach, Eric A; Xie, Jian

    2014-03-12

    We have performed operando synchrotron high-energy X-ray diffraction (XRD) to obtain nonintrusive, real-time monitoring of the dynamic chemical and structural changes in commercial 18650 LiFePO4/C cells under realistic cycling conditions. The results indicate a nonequilibrium lithium insertion and extraction in the LiFePO4 cathode, with neither the LiFePO4 phase nor the FePO4 phase maintaining a static composition during lithium insertion/extraction. On the basis of our observations, we propose that the LiFePO4 cathode simultaneously experiences both a two-phase reaction mechanism and a dual-phase solid-solution reaction mechanism over the entire range of the flat voltage plateau, with this dual-phase solid-solution behavior being strongly dependent on charge/discharge rates. The proposed dual-phase solid-solution mechanism may explain the remarkable rate capability of LiFePO4 in commercial cells.

  2. Designing of luminescent GdPO4:Eu@LaPO4@SiO2 core/shell nanorods: Synthesis, structural and luminescence properties

    Science.gov (United States)

    Ansari, Anees A.; Labis, Joselito P.; Aslam Manthrammel, M.

    2017-09-01

    GdPO4:Eu3+ (core) and GdPO4:Eu@LaPO4 (core/shell) nanorods (NRs) were successfully prepared by urea based co-precipitation process at ambient conditions which was followed by coating with amorphous silica shell via the sol-gel chemical route. The role of surface coating on the crystal structure, crystallinity, morphology, solubility, surface chemistry and luminescence properties were well investigated by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray (EDX) analysis, Fourier Transform Infrared (FTIR), UV-Vis, and photoluminescence spectroscopy. XRD pattern revealed highly purified, well-crystalline, single phase-hexagonal-rhabdophane structure of GdPO4 crystal. The TEM micrographs exhibited highly crystalline and narrow size distributed rod-shaped GdPO4:Eu3+ nanostructures with average width 14-16 nm and typical length 190-220 nm. FTIR spectra revealed characteristic infrared absorption bands of amorphous silica. High absorbance in a visible region of silica modified core/shell/Si NRs in aqueous environment suggests the high solubility along with colloidal stability. The photoluminescence properties were remarkably enhanced after growth of undoped LaPO4 layers due to the reduction of nonradiative transition rate. The advantages of presented high emission intensity and high solubility of core/shell and core/shell/Si NRs indicated the potential applications in monitoring biological events.

  3. 正极材料LiFePO4性能的改进%Improvement of electrochemical properties of LiFePO4 anode Material

    Institute of Scientific and Technical Information of China (English)

    吴斌; 高建峰; 白培康; 甄延波

    2012-01-01

    介绍了LiFePO4作为钴、镍等锂电池代替品的优势及缺点,并针对纯磷酸铁锂极低的电子导电率和锂离子扩散速率这一缺点的改进进行总结.改进的方法主要有3种,一是对高温固相法、微波法、溶胶凝胶等合成工艺改进;二是对LiFePO4包覆导电材料,合成LiFePO4与导电物质的复合物;三是掺杂改性,改善LiFePO4内部的导电性.最后介绍了国内外LiFePO4的发展现状,提出国内LiFePO4发展所要面对的问题.

  4. PREPARATION OF LiFePO4/Ni COMPOSITE MICROSPHERES%LiFePO4/Ni复合微球的制备

    Institute of Scientific and Technical Information of China (English)

    韩翀; 沈湘黔; 周建新

    2008-01-01

    通过控制反应沉淀-焙烧法首先制备了球形LiFePO4粉体,然后在LiFePO4粒子表面包覆柠檬酸镍凝胶,经还原热处理制得LiFePO4/Ni复合微球材料,并采用热重-差热分析、扫描电子显微镜、能谱分析、X射线衍射等手段研究了前驱体和焙烧产物的成分、微观结构、形貌及其热分解过程.结果表明;实验制备的LiFePO4/Ni复合材料由LiFePO4和金属Ni两相组成,保持了球形形貌和多孔结构,金属镍均匀分布于LiFePO4微球表面.

  5. Electrochemical performance of NiO-doped LiFePO4/C cathode materials prepared from amorphous FePO4 · xH2O

    Science.gov (United States)

    Mahmud, Iqbal; Kim, Dong-Seob; Ur, Soon-Chul

    2016-05-01

    LiFePO4/C composites are prepared from amorphous FePO4 · xH2O and are modified with NiO (0.0, 0.01, 0.02, 0.03, and 0.04 mol) by using a solid-state reaction process with a spex milling system. The crystalline structure and the morphology of synthesized powders have been characterized by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD patterns indicate a complete solid solution for all the NiO-doped LiFePO4/C composites. The SEM images show that the sizes of the particles produced are distributed in the range of 200 - 300 nm. The electrochemical performances have been evaluated by using an impedance measurement and a galvanostatic charge/discharge test. The initial properties and impedance measurement reveal different improvements for different amounts of NiO doping in LiFePO4/C. A maximum capacity of 158.8 mAh/g at 0.1 C has been achieved LiFePO4/C doped with NiO at 0.01 mol. The present work reveals that the newly processed composite of LiFePO4/C doped with a small amount of NiO may be a promising material for using in a lithium-ion battery.

  6. Canted antiferromagnetism in KNi3[PO3(F,OH)]2[PO2(OH)2]F2 with a stair-case Kagomé lattice

    Science.gov (United States)

    Liu, Li-Chen; Ren, Wei-Jian; Huang, Ya-Xi; Pan, Yuanming; Mi, Jin-Xiao

    2017-10-01

    A new nickel phosphate KNi3[PO3(F,OH)]2[PO2(OH)2]F2 has been synthesized using a modified hydrothermal method. Structural characterizations show that it adopts a 3D framework structure with 2D layers of Ni octahedra in a stair-case Kagomé lattice. The Ni2 octahedron at the inversion center shares two trans-faces with Ni1 octahedra to form a linear trimer (Ni3O8F6) as the basic structural unit. The Ni-trimers are linked between themselves by sharing F-corners and to [PO3(F,OH)] tetrahedral groups by sharing O-corners to form 2D stair-case Kagomé layers, which are parallel to the (100) plane and are stacked along the a-axis. Successive Kagomé layers are combined together by [PO2(OH)2] tetrahedral groups and interstice cations K+. Magnetic measurements reveal that KNi3[PO3(F,OH)]2[PO2(OH)2]F2 exhibits a canted antiferromagnetic ordering with a ferromagnetic component at low temperatures.

  7. Synthesis and characterization of core/shell structured nanophosphors CePO4:Tb@LaPO4 by solvothermal method

    Institute of Scientific and Technical Information of China (English)

    Dinh Xuan Loc; Tran Thi Kim Chi; Tran Thu Huong; Nguyen Vu; Tran Kim Anh; Wieslaw Strek; Le Quoc Minh

    2011-01-01

    Core/shell structured CePO4:Tb(Ⅲ)@LaPO4 and CePO4:Tb(Ⅲ) were successfully synthesized in tris(2-ethylhexyl) phosphate (TEHP) and diethylene glycol (DEG) solvents for comparison of the two techniques in open air and closed reaction vessel.Morphology and crystal structure of the core/shell nanophosphors were determined by using X-ray diffraction (XRD) and transmission electron microscopy (TEM),which showed that nanophosphors had diameter of about 5-10 nm with the monoclinic monazite phase.The nanophosphors obtained by close vessel procedure showed smaller size,more homogeneity and pure crystallite.The luminescent measurements were done upon the different excitation wavelengths in ultraviolet region and at room temperature to elucidate the influences of the used solvents and the reaction temperatures.It was found that CePO4:Tb@LaPO4 preparedby the close vessel synthesis showed the intensity of green band of the transfer from 5D4 to 7F5 energy level,which was strongly increased,and the luminescent decay time was 3.2 ms,which was longer than that of naked CePO4:Tb phosphor.

  8. Beneficiários ou reféns? o patrimonialismo na perspectiva dos cidadãos de Poço Fundo, Minas Gerais

    Directory of Open Access Journals (Sweden)

    Renato Ferreira de Oliveira

    Full Text Available Há uma diversidade de elementos na cultura política dos pequenos municípios brasileiros agindo em anteposição ao processo democrático, à solidariedade social e para a desconstrução do espírito de comunidade cívica. Nesse cenário, merece destaque a ação do clientelismo, do patrimonialismo e do personalismo. Com objetivo de discutir a dominação e a vigência desses elementos em rotinas públicas e relações sociais, este artigo apresenta o caso de Poço Fundo, município de pequeno porte localizado no Sul de Minas Gerais. Três situações foram destacadas para demonstrar como tais práticas, além de toleradas, são convertidas em estratégia individual diante da ineficiência e da insensibilidade pública, esclarecendo como os políticos capitalizam para si e para seus partidos os favores prestados e como a natureza cíclica dos privilégios constrange ações coletivas, capazes de oferecer resistência ao "loteamento" político da cidade. A precariedade dos serviços públicos identificada nos depoimentos, embora pareça causa da cultura do favor é, antes de tudo, produto desta. Desse modo, ficou evidenciado que a população poçofundense não se tornou beneficiária dessas práticas, mas sim, refém do sistema político.

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

    Directory of Open Access Journals (Sweden)

    Kwan Yuet Ping

    2012-06-01

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

  10. PoD: dynamically create and use remote PROOF clusters. A thin client concept.

    CERN Document Server

    CERN. Geneva

    2012-01-01

    PoD’s newly developed “pod-remote” command made it possible for users to utilize a thin client concept. In order to create dynamic PROOF clusters, users are now able to select a remote computer, even behind a firewall, to control a PoD server on...

  11. Onderzoek naar de verbetering van de bepaling van 210Po en 210Pb in depositie

    NARCIS (Netherlands)

    Glastra P; LSO

    1998-01-01

    In 1995 is gebleken dat de chemische opbrengst van het als merker toegevoegde 208Po bij de bepaling van 210Po en 210Pb in depositiemonsters vaak minder is dan de vereiste 50%. De oorzaak van de lage chemische opbrengsten is onderzocht. Dit rapport beschrijft de uitvoering van het onderzoek en de

  12. Caesium europium(III) polyphosphate, CsEu(PO3)4

    OpenAIRE

    Jing Zhu; Wen-Dan Cheng; Hao Zhang

    2009-01-01

    Caesium europium polyphosphate, CsEu(PO3)4, was synthesized by a high-temperature solution reaction. Its structure is charaterized by a three-dimensional framework made up of double PO4 spiral chains and EuO8 and CsO11 polyhedra.

  13. M(o)ssbauer study and magnetic properties of electrochemical material LiFePO4

    Institute of Scientific and Technical Information of China (English)

    Luo Zhi; Di Nai-Li; Kou Zhi-Qi; Cheng Zhao-Hua; Liu Li-Jun; Chen Li-Quan; Huang Xue-Jie

    2004-01-01

    Magnetic properties and crystal symmetry of electrochemical material LiFePO4 have been investigated by Mossbauer spectroscopy and magnetization measurement. Magnetization reveals the antiferromagnetic nature of LiFePO4. Temperature dependence of inverse susceptibility and that of hyperfine field confirm that there is an antiferromagnetic-paramagnetic transition at about 50K.

  14. Biocarbon-coated LiFePO4 nucleus nanoparticles enhancing electrochemical performances.

    Science.gov (United States)

    Zhang, Xueguang; Zhang, Xudong; He, Wen; Yue, Yuanzheng; Liu, Hong; Ma, Jingyun

    2012-10-18

    We report a simple, inexpensive green biomimetic way for developing the high performance LiFePO(4) for high-power lithium-ion batteries. Biocarbon-coated LiFePO(4) nucleus nanoparticles are synthesized by using yeast cells as both a structural template and a biocarbon source.

  15. Hexamethylenetetramine assisted hydrothermal synthesis of BiPO4 and its electrochemical properties for supercapacitors

    Science.gov (United States)

    Nithya, V. D.; Kalai Selvan, R.; Vasylechko, Leonid

    2015-11-01

    The well defined microstructures of BiPO4 were successfully synthesized by the facile hexamethylenetetramine (HMT) assisted hydrothermal method. The low temperature monoclinic BiPO4 structure with space group P21/n, were obtained from X-ray diffraction (XRD) for the pristine and HMT-assisted BiPO4 with 1, 3, 5 and 10 mmole concentration. A transformation from low temperature monazite-type phase to the high temperature SbPO4-type phase of BiPO4 was observed at the 10 mmole concentration. There was a variation in the morphology from polyhedron to octahedra-like and finally into cube shape upon an increase in concentration of HMT. The role of reaction time in the morphology of BiPO4 particles was investigated. The selected area electron diffraction (SAED) pattern elucidated the ordered dot pattern and the calculated d-spacing revealed the formation of BiPO4. An increased specific capacitance of HMT assisted materials (202 F/g) compared with pristine BiPO4 (89 F/g) at 5 mA/cm2 was observed upon morphological variation due to HMT addition.

  16. Effect of organic-inorganic hybrid P123-em-SBA15 on lithium transport properties of composite polymer electrolyte

    Institute of Scientific and Technical Information of China (English)

    XI Jingyu; HUANG Xiaobin; TANG Xiaozhen

    2004-01-01

    A novel PEO-based composite polymer electrolyte by using organic-inorganic hybrid EO20PO70EO20-em- mesoporous silica (P123-em-SBA15) as the filler has been developed. The experiment results show that P123-em- SBA15 can enhance the lithium-ion transference number of the composite polymer electrolyte, which is induced by the special topology structure of P123 in P123-em-SBA15 hybrid. In addition, room temperature ionic conductivity of the composite polymer electrolyte can also be increased by about two orders of magnitude. The excellent lithium transport properties suggest that PEO-LiClO4-P123-em-SBA15 composite polymer electrolyte can be used as electrolyte materials for all solid-state rechargeable lithium polymer batteries.

  17. A intencionalidade do profano na poética hilstiana

    Directory of Open Access Journals (Sweden)

    Patricia Maria dos Santos Santana

    2014-01-01

    Full Text Available O presente artigo mostra a poesia erótica de Hilda Hilst em seu vínculo íntimo com o sagrado, salientando a busca divina da autora como fator essencial em seu processo de criação.  Hilst procurou dizer o que angustiava o seu interior através de suas poesias eróticas. Na sua procura por Deus, a autora exteriorizou o seu fazer criativo de maneira irreverente. A obra Do Desejo de Hilda permite estudar esteticamente a questão de gênero na sociedade brasileira, representando a forma que a mulher daquela época procurava mostrar o seu pensamento e ser vista como ser social independente.

  18. <em>In Vitroem> Antioxidant Properties of Flavonoids and Polysaccharides Extract from Tobacco (<em>Nicotiana> em>tabacum> L. Leaves

    Directory of Open Access Journals (Sweden)

    Jing-Lu Wang

    2012-09-01

    Full Text Available In the present study, antioxidant properties of flavonoids and polysaccharides from tobacco (<em>Nicotiana> tabacumem> L. leaves were evaluated in several <em>in vitroem> systems, e.g., scavenging activities on hydroxyl, superoxide anion, 1,1-diphenyl-2-picrylhydrazyl (DPPH and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid (ABTS radicals, and reducing power. Flavonoids showed much better activity than polysaccharides in scavenging activities on free radicals. When compared to the positive control, ascorbic acid, both showed weaker antioxidant potential. However, flavonoids possessed comparable superoxide anion, DPPH and ABTS radical scavenging abilities to ascorbic acid at high concentration (600 μg/mL. Meanwhile, it was found that flavonoids had prominent effects on the reducing power, which was equivalent to ascorbic acid, and was significantly higher than polysaccharides. These results clearly indicate that flavonoids are effective in scavenging free radicals and have the potential to be powerful antioxidants. Thus, tobacco leaves could be considered as a potential source of natural antioxidants for food, pharmaceutical, cosmetics or nutraceutical industries.

  19. Ultrathin carbon nanopainting of LiFePO4 by oxidative surface polymerization of dopamine

    Science.gov (United States)

    Ding, Bo; Tang, Wei Chin; Ji, Ge; Ma, Yue; Xiao, Pengfei; Lu, Li; Lee, Jim Yang

    2014-11-01

    The common strategy to address the low electronic conductivity of LiFePO4 is to downsize LiFePO4 and to coat the nanocrystal with conductive carbon film. The major issues with existing carbon coating techniques are thickness and quality control. This paper reports a facile carbon coating method which can provide ultrathin, uniform and fully encapsulating carbon coating on LiFePO4. This coating method capitalizes on the redox chemistry of surface Fe3+ on solvothermally synthesized LiFePO4 nanocrystal, to deposit uniform thin films of polydopamine films. The polymer film is easily carbonized into ultrathin carbon film. The carbon coated LiFePO4 exhibits very high rate performance (143 mAh g-1 at current density of 1700 mA g-1) with excellent capacity retention.

  20. Electrochemical performance of LiFePO4 cathode material for Li-ion battery

    Institute of Scientific and Technical Information of China (English)

    LI Shuzhong; LI Chao; FAN Yanliang; XU Jiaqiang; WANG Tao; YANG Shuting

    2006-01-01

    In the search for improved materials for rechargeable lithium batteries, LiFePO4 offers interesting possibilities because of its low raw materials cost, environmental friendliness and safety. The main drawback with using the material is its poor electronic conductivity and this limitation has to be overcome. Here Al-doped LiFePO4/C composite cathode materials were prepared by a polymer-network synthesis technique. Testing of X-ray diffraction, charge-discharge, and cyclic voltammetry were carried out for its performance. Results show that Al-doped LiFePO4/C composite cathode materials have a high initial capacity, good cycle stability and excellent low temperature performance. The electrical conductivity of LiFePO4 material can be obviously improved by doping Al. The better electrochemical performances of Al-doped LiFePO4/C composite cathode materials have a connection with its conductivity.

  1. Columnar order in jammed LiFePO4 cathodes: ion transport catastrophe and its mitigation.

    Science.gov (United States)

    Smith, Kyle C; Mukherjee, Partha P; Fisher, Timothy S

    2012-05-21

    The high-rate, high-capacity potential of LiFePO4-based lithium-ion battery cathodes has motivated numerous experimental and theoretical studies aiming to realize such performance through nano-sizing, tailoring of particle shape through synthesis conditions, and doping. Here, a granular mechanics study of microstructures formed by dense jammed packings of experimentally and theoretically inspired LiFePO4 particle shapes is presented. A strong dependence of the resultant packing structures on particle shapes is observed, in which columnar structures aligned with the [010] direction inhibit diffusion along [010] in anisotropic LiFePO4. Transport limitations are induced by [010] columnar order and lead to catastrophic performance degradation in anisotropic LiFePO4 electrodes. Further, judicious mixing of nanoplatelets with additive nanoparticles can frustrate columnar ordering and thereby enhance the rate capability of LiFePO4 electrodes by nearly an order of magnitude.

  2. First-principles study of Li ion diffusion in LiFePO4

    Science.gov (United States)

    Ouyang, Chuying; Shi, Siqi; Wang, Zhaoxiang; Huang, Xuejie; Chen, Liquan

    2004-03-01

    The diffusion mechanism of Li ions in the olivine LiFePO4 is investigated from first-principles calculations. The energy barriers for possible spatial hopping pathways are calculated with the adiabatic trajectory method. The calculations show that the energy barriers running along the c axis are about 0.6, 1.2, and 1.5 eV for LiFePO4, FePO4, and Li0.5FePO4, respectively. However, the other migration pathways have much higher energy barriers resulting in very low probability of Li-ion migration. This means that the diffusion in LiFePO4 is one dimensional. The one-dimensional diffusion behavior has also been shown with full ab initio molecular dynamics simulation, through which the diffusion behavior is directly observed.

  3. Computational investigation into the phase transitions from AlPO4-H3

    Institute of Scientific and Technical Information of China (English)

    李激扬; 于吉红; 徐如人

    2003-01-01

    Molecular dynamics simulation approach has been used to investigate the phase transitions from aluminophosphate AlPO4-H3. Derived from AlPO4-H3, several hypothetical models of its high-temperature phases are designed through removing the bridged water molecules and changing the up-down connected sequences of T-sites in the 4-membered rings. Full geometry optimizations are performed to obtain structural parameters for the models that are compared to the reported data, and their structure features and thermodynamic stabilities have been discussed. The simulation study suggests that AlPO4-H3 is energetically favored to transform to AlPO4-C, and then to AlPO4-D as well as to other novel hypothetical 3D open-frameworks.

  4. Vapour phase oxidation of toluene over CeAlPO-5 molecular sieves.

    Science.gov (United States)

    Devika, S; Sundaravel, B; Palanichamy, M; Murugesan, V

    2014-04-01

    Single-site CeAlPO-5 with Al/Ce ratios 25, 50, 75, 100 and 125 were synthesized hydrothermally in fluoride medium. The XRD patterns of CeAlPO-5 exhibited characteristic reflections of AlPO-5. 27Al MAS-NMR of CeAIPO-5(25) showed two unusual peaks at -20.78 and -71.35 ppm due to delocalization of cerium unpaired electron. However, 31P MAS-NMR exhibited the usual characteristic peak similar to that of AlPO-5. Vapour phase oxidation of toluene in air over CeAlPO-5 yielded benzaldehyde with high toluene conversion. The time on stream study established the stability of the catalyst. This catalyst can also be used for the selective oxidation of other alkyl aromatics.

  5. No Marulhar das Glossolalias em Artaud

    Directory of Open Access Journals (Sweden)

    Gil Roberto Almeida

    2016-01-01

    Full Text Available A partir da obra de Artaud, evidencia-se um ideário que sugere princípios para uma vocalidade no contexto da performance. Essa vocalidade é baseada em uma noção de glossolalia como conceito vinculado às práticas enunciativas, sobretudo como potência para desarrazoar estratos vocais. Assim, a glossolalia pode agregar valores sonoro-poéticos que desestabilizam aspectos da produção e percepção de sentidos relacionados à voz. Busca-se aqui uma discussão sobre possíveis fronteiras da produção vocal. Serão apropriados conceitos da obra de Deleuze e Guattari, assim como reflexões de Certeau e Pozzo. Os objetivos do artigo importam em suscitar e valorizar aspectos de uma vocalidade glossolálica, visando ampliar as possibilidades do performer contemporâneo, problematizando o contexto de suas práticas vocais.

  6. Solvothermal synthesis of Ag hybrid BiPO4 heterostructures with enhanced photodegradation activity and stability.

    Science.gov (United States)

    Huang, Chang-Wei; Wu, Mei-Yao; Lin, Yang-Wei

    2017-03-15

    In this study, Ag hybrid BiPO4 (Ag/BiPO4) heterostructures were synthesized using a solvothermal method. The morphologies and optical properties of the Ag/BiPO4 heterostructures were drastically different from those of BiPO4 and were highly dependent on the AgNO3:BiPO4 weight percent during the synthesis. The three formulated heterostructures were evaluated for their photocatalytic degradation of methylene blue (MB) under UV light illumination; the 0.5%Ag/BiPO4 heterostructure was observed to result in 99% degradation of MB within 60min, a remarkably higher level of photodegradation activity than the levels caused by TiO2 and BiPO4. Furthermore, even after use for five cycles of MB degradation, the 0.5%Ag/BiPO4 heterostructure showed no observable loss in photodegradation activity and no change in XRD patterns, demonstrating its chemical and structural stability. According to the results of a systematic experimental investigation, the enhanced photodegradation activity of this Ag/BiPO4 heterostructure could be ascribed to the high position of its valence band and the highly efficient separation of photogenerated electrons and holes. Moreover, hydroxyl radicals and holes were found to be the major reactive species. Successful photodegradation of standard dye solutions, including acid blue 1, methyl orange, fast green, rhodamine B, rhodamine 6G, and MB, in real water samples was demonstrated with the 0.5%Ag/BiPO4 heterostructure, providing clear evidence of its utility for treating waste water containing organic dyes.

  7. Processes controlling the distributions of Cd and PO4 in the ocean

    Science.gov (United States)

    Quay, Paul; Cullen, Jay; Landing, William; Morton, Peter

    2015-06-01

    Depth profiles of dissolved Cd and PO4 from a global data compilation were used to derive the Cd/P of particles exported from the surface layer, and the results indicate lowest values in the North Atlantic (0.17 ± 0.05), highest in the Southern (0.56 ± 0.24), and intermediate in the South Indian (0.31 ± 0.14) and North Pacific (0.36 ± 0.08) Ocean basins. The Cd/P of exported particles in high nutrient-low chlorophyll (HNLC) regions is twice that for particles exported in non-HNLC regions as is the fractionation effect during biological uptake of Cd and PO4, and these trends primarily determine the spatial trends of dissolved Cd/PO4 observed in the surface ocean. In deep waters the lowest dissolved Cd/PO4 of 0.23 ± 0.07 is found in the North Atlantic Ocean and the result primarily of low Cd/PO4 of North Atlantic Deep Water (0.23). In contrast, deep waters in the Southern Ocean have significantly higher dissolved Cd/PO4 (0.30 ± 0.06), which is a result of the Cd/PO4 of upwelled deep water from the South Pacific and South Indian (0.28) and the high Cd/P of degrading particles. A multibox model that accounts for the impacts of particle degradation and thermohaline circulation in the deep sea yields dissolved Cd and PO4 interbasin trends close to observations. Model experiments illustrate the dependence of the dissolved Cd/PO4 of the deep sea on the extent of HNLC conditions in the Southern Ocean and the impact on reconstructing paleo PO4 concentrations from a Cd proxy.

  8. Removal of lead from crude antimony by using NaPo3 as lead elimination reagent

    Directory of Open Access Journals (Sweden)

    Ye L.G.

    2015-01-01

    Full Text Available In order to solve the shortcomings when removing lead from crude antimony in the traditional antimony smelting, a new process was provided using NaPO3 as lead elimination reagent to yield phosphate slag, and it was removed by floating on the surface of the liquid antimony. Reaction mechanism was clarified by using the TG-DTA and XRD techniques and single factor experiments of removal lead from crude antimony were engaged. The results show that PbO and NaPO3 begin endothermic reaction at 863K (590°C, and the reaction mainly form NaPb4(PO43 and NaPbPO4 below 1123K (850°C and above 1123K (850°C, respectively. Sb2O3 and NaPO3 start the reaction at 773K (500°C and generate an antimonic salt compound. The reaction product of the mixture of PbO, Sb2O3 and NaPO3 show that NaPO3 reacted with PbO prior when NaPO3 was insufficient, amorphous antimony glass will be generated only when NaPO3 was adequate. Single factor experiments were taken with NaNO3 as oxidizing agent under argon, effect of reaction time, reaction temperature and dosage of NaPO3 and NaNO3 on smelting results. The average content of lead in refined antimony was 0.05340% and 98.85% of lead were removed under optimal conditions; the content of lead in antimony have meet the requirements of commercial antimony.

  9. Preparação de carvão ativado em baixas temperaturas de carbonização a partir de rejeitos de café: utilização de FeCl3 como agente ativante Preparation of activated carbon at low carbonization temperatures: utilization of FeCl3 as an alternative activating agent

    Directory of Open Access Journals (Sweden)

    Elaine Pereira

    2008-01-01

    Full Text Available Ferric chloride as a new activating agent was used to obtain activated carbons from agroindustrial waste. This material was prepared at three temperatures of pyrolysis, 200, 280 and 400 ºC. The carbonaceous materials obtained after the activation processes showed high specific surface areas (BET, with values higher than 900 m² g-1. The materials showed different behaviors in the adsorption of methylene blue dye and reactive red textile dye in water solutions. An important fact in the use of FeCl3 as an activating agent is that the activation temperature is at 280 ºC, well below of those commonly employed in chemical or physical activations described in the literature.

  10. Efeito in vitro da terapia fotodinâmica sobre bactérias orais em suspensão e na formação de biofilme : ensaio com azul de metileno e toluidina ativados por luz halógena

    OpenAIRE

    Dantas, Emanuelle Dayana Vieira

    2011-01-01

    A terapia fotodinâmica (TFD) tem sido proposta como um método alternativo para o tratamento de doenças orais biofilme-dependentes, como a cárie dentária. Tal terapia consiste na ação simultânea de uma fonte luminosa (FL) e de um agente fotossensibilizante (FS), na presença de oxigênio tecidual, levando à produção de radicais livres que ao interagirem com componentes celulares bacterianos, promovem a morte celular. Este estudo tem como objetivo avaliar a ação antimicrobiana da TFD sobre bactér...

  11. Efeito in vitro da terapia fotodinâmica sobre bactérias orais em suspensão e na formação de biofilme : ensaio com azul de metileno e toluidina ativados por luz halógena

    OpenAIRE

    Dantas, Emanuelle Dayana Vieira

    2011-01-01

    A terapia fotodinâmica (TFD) tem sido proposta como um método alternativo para o tratamento de doenças orais biofilme-dependentes, como a cárie dentária. Tal terapia consiste na ação simultânea de uma fonte luminosa (FL) e de um agente fotossensibilizante (FS), na presença de oxigênio tecidual, levando à produção de radicais livres que ao interagirem com componentes celulares bacterianos, promovem a morte celular. Este estudo tem como objetivo avaliar a ação antimicrobiana da TFD sobre bactér...

  12. LiFePO4 Nanostructures Fabricated from Iron(III) Phosphate (FePO4 x 2H2O) by Hydrothermal Method.

    Science.gov (United States)

    Saji, Viswanathan S; Song, Hyun-Kon

    2015-01-01

    Electrode materials having nanometer scale dimensions are expected to have property enhancements due to enhanced surface area and mass/charge transport kinetics. This is particularly relevant to intrinsically low electronically conductive materials such as lithium iron phosphate (LiFePO4), which is of recent research interest as a high performance intercalation electrode material for Li-ion batteries. Many of the reported works on LiFePO4 synthesis are unattractive either due to the high cost of raw materials or due to the complex synthesis technique. In this direction, synthesis of LiFePO4 directly from inexpensive FePO4 shows promise.The present study reports LiFePO4 nanostructures prepared from iron (III) phosphate (FePO4 x 2H2O) by precipitation-hydrothermal method. The sintered powder was characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), Inductive coupled plasma-optical emission spectroscopy (ICP-OES), and Electron microscopy (SEM and TEM). Two synthesis methods, viz. bulk synthesis and anodized aluminum oxide (AAO) template-assisted synthesis are reported. By bulk synthesis, micro-sized particles having peculiar surface nanostructuring were formed at precipitation pH of 6.0 to 7.5 whereas typical nanosized LiFePO4 resulted at pH ≥ 8.0. An in-situ precipitation strategy inside the pores of AAO utilizing the spin coating was utilized for the AAO-template-assisted synthesis. The template with pores filled with the precipitate was subsequently subjected to hydrothermal process and high temperature sintering to fabricate compact rod-like structures.

  13. Une poétique du vœu : inspiration poétique et mystique impériale dans le poème XIX (et quelques autres d’Optatianus Porfyrius

    Directory of Open Access Journals (Sweden)

    Marie-Odile Bruhat

    2010-11-01

    Full Text Available La majorité des poèmes d’Optatianus Porfyrius qui nous sont parvenus est dédiée à l’empereur Constantin et consacrée à son éloge. Mais dans cette poésie visuelle d’un nouveau genre, la célébration de l’art poétique tient une place aussi importante que la célébration impériale. Comment considérer le discours proprement poétique d’Optatianus ? Est-il simplement juxtaposé au discours politique ? Relève-t-il d’une pure convention ornementale ? Ces questions sont d’autant plus pertinentes que, loin de présenter le procédé visuel dont il est l’inventeur comme un art technicien, Optatianus revendique le double titre de poiètès et de uates et convoque les divinités de l’inspiration, Phébus et les Muses, alors même que ses poèmes se font l’écho de la nouvelle théologie chrétienne du pouvoir. La réponse apparaît double. D’une part, la poésie d’Optatianus peut être définie comme votive. Ses poèmes s’inscrivent dans la liturgie du pouvoir, c’est-à-dire dans le cadre d’une théologie impériale qui repose sur l’affirmation de l’éternité de la victoire et sur le renouvellement du charisme victorieux à travers le rituel des voeux. Par son discours sur Phébus et les Muses, Optatianus met en place une véritable poétique du voeu, qui consiste à couler la mystique de l’inspiration dans le moule de la mystique impériale. D’autre part, ce projet poétique répond à bien des égards à l’attente impériale. Il rencontre la volonté de Constantin de développer une politique culturelle, et se plie à quelques traits caractéristiques de sa religiosité : conviction de la nécessité du secours divin dans les actions humaines, d’une inspiration divine dont Constantin a fait lui-même l’expérience, attention aux signes et aux visions, attachement à un charisme solaire qui coexiste sous une forme « neutralisée » avec sa foi chrétienne. Le poème XIX, composé à l

  14. Sintesi sulla morfometria del primo molare inferiore nel gruppo <em>Microtus (Terricola saviiem>

    Directory of Open Access Journals (Sweden)

    Armando Nappi

    2003-10-01

    Full Text Available <em>Microtus (Terricola saviiem> è distribuito su quasi tutta la penisola italiana e la Sicilia. La sottospecie <em>brachycercus>, descritta su esemplari della Sila (Calabria, risulta essere buona specie da studi cromosomici. È stata testata la morfometria del primo molare inferiore tramite 27 variabili considerando 55 (di cui 2 fossili popolazioni di <em>M. saviiem> (1351 denti e 7 di <em>Terricola> calabresi (221 denti. Se il numero di denti risultava basso si sono raggruppate più popolazioni quando possibile. Sugli assi dell?analisi discriminante è interessante notare come, benché vi siano somiglianze tra popolazioni che seguono una logica geografica, altre popolazioni vicine geograficamente risultano molto distanti dal punto di vista morfologico e somigliano per contro a popolazioni differenti sia per posizione geografica che situazioni ecologiche. È noto nelle arvicole il fenomeno per il quale una determinata specie, oltre ai morfotipi dentari ad essa tipici, ne possiede altri simili se non identici a quelli di altre specie (serie di Vavilov. Lo stesso fenomeno è osservabile a livello di popolazione nello studio da noi effettuato. Interessanti anche le posizioni marginali di alcune popolazioni come Lotrago di Romagnano (VR, Zelarino (VE, Valle Millecampi (VE, Nonantola (MO, Imola-Romitorio (BO/RA, Monti della Tolfa (RM, Torre del Greco (NA, Melissano (LE, Monteparano (TA, Fontasala (TP, Roccapalumba (PA. Considerando infine nell?insieme tutte le popolazioni di <em>savii> e <em>Terricola> calabresi, dall?analisi della varianza si riscontrano differenze significative in: lunghezza relativa della parte anteriore (p<0.0001; med 51.126 sav, 50.324 cal, inclinazione rombo pitimiano (p<0.0001; med -0.018 sav, ?0.043 cal, strozzatura cappio anteriore (p<0.0001; med 25.694 sav, 29.704 cal, V6/V21 (p<0.0001; med 2.582 sav, 2.509 cal, (V10-V9/V6 (p<0.0001; med 13.915 sav, 13.040 cal, (V12-V10/V6 (p<0.0001; med 2.180 sav, 2

  15. Catalytic effect of a second H3PO2 in the mechanism of stabilisation of the unstable pyramidal tautomer of H3PO2 coordinated at [Mo3S4M'] clusters (M' = Ni, Pd).

    Science.gov (United States)

    Algarra, Andrés G; Basallote, Manuel G; Fernández-Trujillo, María J; Hernández-Molina, Rita; Safont, Vicent S

    2007-08-07

    Kinetic and DFT studies indicate that the stabilization of a single pyramidal H(3)PO(2) molecule at the M' site of [Mo(3)S(4)M'] clusters requires the participation of two tetrahedral H(3)PO(2) molecules, the role of the second one being assisting tautomerization of a previously coordinated tetrahedral H(3)PO(2).

  16. Uma Infra-Estrutura Verde Para a Bacia do Córrego Poá, Taboão da Serra, SP

    Directory of Open Access Journals (Sweden)

    Lícia Cotrim Carneiro Leão

    2010-12-01

    Full Text Available Este artigo tem como objetivo apresentar os resultados de um exercício projetual, fruto de atividades acadêmicas coordenadas pelo professor doutor Paulo Renato Mesquita Pellegrino, em 2007, no curso de pós-graduação da Faculdade de Arquitetura e Urbanismo da Universidade de São Paulo. O tema central desse exercício foi o desenvolvimento de uma estratégia para implantação de uma infra-estrutura verde para a bacia do córrego Poá, localizada no município de Taboão da Serra, em São Paulo, que hoje se encontra em uma área intensamente transformada, densamente construída e poluída. O trabalho foi elaborado em dois momentos, abrangendo uma proposta para toda a bacia e outra para um recorte escolhido dessa bacia. As propostas surgiram do cruzamento entre os mapas elaborados sobre os aspectos biofísicos e urbanos locais, a revisão teórica e as análises realizadas em visitas a campo. Foram sugeridas novas formas de planejar-se a paisagem a partir da qualificação e articulação dos espaços abertos vegetados e da criação de formas de circulação para as pessoas, a fauna local e as águas. Contudo, para o sucesso da aplicação desse conceito é necessária a reunião de esforços coordenados e multidisciplinares, envolvendo instituições de pesquisa, comunidade, autoridades e lideranças locais.

  17. Emergency Medical Service (EMS) Stations

    Data.gov (United States)

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

  18. Isolation and Characterization of a Lycopene ε-Cyclase Gene of <em>Chlorella em>(Chromochloris> <em>zofingiensis>. Regulation of the Carotenogenic Pathway by Nitrogen and Light

    Directory of Open Access Journals (Sweden)

    Maria Angeles Vargas

    2012-09-01

    Full Text Available The isolation and characterization of the lycopene ε-cyclase gene from the green microalga <em>Chlorella em>(Chromochloris> <em>zofingiensis> (<em>Czlcy-e> was performed. This gene is involved in the formation of the carotenoids α-carotene and lutein. <em>Czlcy-e> gene encoded a polypeptide of 654 amino acids. A single copy of <em>Czlcy-e> was found in <em>C. zofingiensisem>. Functional analysis by heterologous complementation in <em>Escherichia coliem> showed the ability of this protein to convert lycopene to δ-carotene. In addition, the regulation of the carotenogenic pathway by light and nitrogen was also studied in <em>C. zofingiensisem>. High irradiance stress did not increase mRNA levels of neither lycopene β<em>->cyclase gene (<em>lcy-b> nor lycopene ε-cyclase gene<em> em>(lcy-e> as compared with low irradiance conditions, whereas the transcript levels of <em>psy>, <em>pds>, <em>chyB> and <em>bkt> genes were enhanced, nevertheless triggering the synthesis of the secondary carotenoids astaxanthin, canthaxanthin and zeaxanthin and decreasing the levels of the primary carotenoids α-carotene, lutein, violaxanthin and β-carotene. Nitrogen starvation <em>per seem> enhanced mRNA levels of all genes considered, except <em>lcy-e and pdsem>, but did not trigger the synthesis of astaxanthin, canthaxanthin nor zeaxanthin. The combined effect of both high light and nitrogen starvation stresses enhanced significantly the accumulation of these carotenoids as well as the transcript levels of <em>bkt> gene, as compared with the effect of only high irradiance stress.

  19. Variações (e devaneios sobre o Ser: uma poética a partir de um mito de originário

    Directory of Open Access Journals (Sweden)

    Francisco Josivan Souza

    2009-12-01

    Full Text Available

    As intenções de se explicar o Ser esbarram, não raras as vezes, num problema fulcral para a Filosofia ocidental: a disputa entre a <em>permanência>, em Parmênides, e a <em>impermanência>, em Heráclito. Acontece que tal disputa não ficou restrita a ambos os filósofos pré-socráticos, pois que se configurou como ponto fundamental dos filósofos posteriores: de Platão-Aristóteles a Kant-Hegel. O que traz este artigo é uma abordagem, no horizonte da poética, desta disputa a fim de apresentar o mito da <em>Casa da Pedraem>, do povo indígena Mỹky, como arquétipo do drama humano, a favor de Heráclito, confirmando a errância como vereda fundamental da existência.

  20. Distribution of 210Po in soils of Virajpet taluk, Coorg District, Karnataka

    Directory of Open Access Journals (Sweden)

    M.M. Prakash

    2017-01-01

    Full Text Available The present investigation involves the distribution of 210Po in the soils of Virajpet taluk, in Coorg District. The soil samples were collected along a vertical profile at various locations. The samples were analyzed for determination of 210Po activity using standard radiochemical analytical method. The distribution of 210Po along vertical profile was found. The dependence of 210Po activity on organic matter and clay in a vertical profile were analysed. The texture of soil shows that soil is sandy loam or loamy sand, in which illuviation takes place easily. The 210Po activity varies from 1.59 Bqkg−1 to 13.95 Bqkg−1 in first layer, 0.49 Bqkg−1 to 9.79 Bqkg−1 in second layer and 0.58 Bqkg−1 to 6.14 Bqkg−1 in third layer. A negative correlation between organic matter percentage and 210Po activity was found in all the three layers with correlation coefficient −0.872, −0.643 and −0.505. A negative correlation was observed between clay percentage and 210Po activity, in all the three layers with correlation coefficient −0.749, −0.512 and −0.402. The organic matter leaches vertically downwards, due to flow of rainwater.

  1. Kinetic behavior of LiFeMgPO 4 cathode material for Li-ion batteries

    Science.gov (United States)

    Hong, Jian; Wang, Chunsheng; Kasavajjula, Uday

    LiFe 0.9Mg 0.1PO 4 material was prepared by mechanical milling method, followed by heat treatment. The equilibrium potential-composition isotherm of LiFe 0.9Mg 0.1PO 4 and charge-discharge kinetics of LiFe 0.9Mg 0.1PO 4 were measured using galvanostatic intermittent titration technique (GITT), potential-step chronoamperometry (PSCA), and electrochemical impedance spectroscopy (EIS). The rate performance of the cathode is controlled by the charge-transfer kinetics, electronic conductivity, Li-ion diffusion capability, and phase transformation rate. Since LiFe 0.9Mg 0.1PO 4 has a fast charge-transfer reaction and high electronic and ionic diffusivity, the phase transformation between LiFe 0.9Mg 0.1PO 4 and Li 0.1Fe 0.9Mg 0.1PO 4 begins to play a more important role in the charge-discharge process, as is evident by an inductive loop induced by the phase transformation in the low frequency region of EIS. The phase purity and morphology of LiFe 0.9Mg 0.1PO 4 were also observed using X-ray diffraction (XRD) and scanning electron microscopy (SEM).

  2. Machining Characteristics of Ce-ZrO2/CePO4 Ceramics

    Institute of Scientific and Technical Information of China (English)

    Yu Aibing; Tan Yefa; Yang Xiaoqiang

    2004-01-01

    Two-phase mixtures of Ce-ZrO2 and monazite-type CePO4 were fabricated. Drilling and grinding experiments were carried out to investigate the machining characteristics of Ce-ZrO2/CePO4 ceramics. The machined surfaces of ceramics and wear surfaces of drill bits were observed with scanning electron microscope. Material removals and grinding forces were measured. The transgranular fracture of CePO4 grains, intergranular fracture between ZrO2 and CePO4 grains, and ductile deformation of ceramics were observed on Ce-ZrO2/CePO4 machined surfaces. With the increase of CePO4 proportion to composites, drilling material removal rates increases and specific normal grinding forces decreases.There existed rapid wear of conventional metal cutting tool is caused by abrasive wear. The experimental results indicate that the weak interfaces and properties of Ce-ZrO2/CePO4 ceramics have influences on material removal and machinability.

  3. On a framework for generating PoD curves assisted by numerical simulations

    Science.gov (United States)

    Subair, S. Mohamed; Agrawal, Shweta; Balasubramaniam, Krishnan; Rajagopal, Prabhu; Kumar, Anish; Rao, Purnachandra B.; Tamanna, Jayakumar

    2015-03-01

    The Probability of Detection (PoD) curve method has emerged as an important tool for the assessment of the performance of NDE techniques, a topic of particular interest to the nuclear industry where inspection qualification is very important. The conventional experimental means of generating PoD curves though, can be expensive, requiring large data sets (covering defects and test conditions), and equipment and operator time. Several methods of achieving faster estimates for PoD curves using physics-based modelling have been developed to address this problem. Numerical modelling techniques are also attractive, especially given the ever-increasing computational power available to scientists today. Here we develop procedures for obtaining PoD curves, assisted by numerical simulation and based on Bayesian statistics. Numerical simulations are performed using Finite Element analysis for factors that are assumed to be independent, random and normally distributed. PoD curves so generated are compared with experiments on austenitic stainless steel (SS) plates with artificially created notches. We examine issues affecting the PoD curve generation process including codes, standards, distribution of defect parameters and the choice of the noise threshold. We also study the assumption of normal distribution for signal response parameters and consider strategies for dealing with data that may be more complex or sparse to justify this. These topics are addressed and illustrated through the example case of generation of PoD curves for pulse-echo ultrasonic inspection of vertical surface-breaking cracks in SS plates.

  4. Visible light assisted degradation of organic dye using Ag{sub 3}PO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Dhanabal, R.; Bose, A. Chandra, E-mail: acbose@nitt.edu [Nanomaterials Laboratory, Department of Physics, National Institute of Technology Tiruchirappalli – 620 015 India (India); Velmathi, S. [Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology Tiruchirappalli – 620 015 India (India)

    2015-06-24

    The study of visible light photodegradation of organic dye Methylene Blue (MB) have been investigated using silver phosphate (Ag{sub 3}PO{sub 4}) as a photocatalyst which is good efficient material for photocatalytic reaction. The simple ion-exchange method is used to prepare Ag{sub 3}PO{sub 4}. The structure of the material have been confirmed using X-ray diffraction which shows cubic structure of Ag{sub 3}PO{sub 4}. The functional group of the Ag{sub 3}PO{sub 4} has been verified by Fourier transform infrared spectroscopy. The bandgap of Ag{sub 3}PO{sub 4} is calculated using kubelka-munk function from the ultra violet-visible diffuse reflectance spectroscopy, the absorption of Ag{sub 3}PO{sub 4} starts from 470 nm. Under simulated visible light irradiation, Ag{sub 3}PO{sub 4} catalyst exhibits good catalytic ability for degrading MB dye.

  5. $^{206}$ Po sources for production and release studies relevant for high power spallation targets

    CERN Multimedia

    The knowledge of the evaporation behaviour of Po is of essential importance for several scientific and technological applications, like accelerator driven systems (ADS) or the LIEBE project at CERN-ISOLDE. Fundamental investigations on the experimental conditions for the formation of volatile Po species as well as on the chemical composition of the volatile compounds are necessary for a safe operation of such facilities. $^{206}$Po, a mainly $\\gamma$- ray-emitting Po isotope with a half-life of 8.8 d, is best suited for model studies, due to the lower radiation hazard compared to the longer-lived $\\alpha$-emitting isotopes $^{208-210}$Po as well as the easy-to-measure $\\gamma$-ray emission. We propose the production of $^{206}$Po samples in several matrices via the implantation of its precursor $^{210}$Fr into selected metal foils at CERN-ISOLDE. Using these samples, experiments will be carried out at PSI studying the volatilization of Po from different matrices under varying chemical conditions.

  6. Ultralong Lifespan and Ultrafast Li Storage: Single-Crystal LiFePO4 Nanomeshes.

    Science.gov (United States)

    Zhang, Yan; Zhang, Hui Juan; Feng, Yang Yang; Fang, Ling; Wang, Yu

    2016-01-27

    A novel LiFePO4 material, in the shape of a nanomesh, has been rationally designed and synthesized based on the low crystal-mismatch strategy. The LiFePO4 nanomesh possesses several advantages in morphology and crystal structure, including a mesoporous structure, its crystal orientation that is along the [010] direction, and a shortened Li-ion diffusion path. These properties are favorable for their application as cathode in Li-ion batteries, as these will accelerate the Li-ion diffusion rate, improve the Li-ion exchange between the LiFePO4 nanomesh and the electrolyte, and reduce the Li-ion capacitive behavior during Li intercalation. So the LiFePO4 nanomesh exhibits a high specific capacity, enhanced rate capability, and strengthened cyclability. The method developed here can also be extended to other similar systems, for instance, LiMnPO4 , LiCoPO4 , and LiNiPO4 , and may find more applications in the designed synthesis of functional materials.

  7. Shape controlled hydrothermal synthesis and characterization of LiFePO4 for lithium ion batteries.

    Science.gov (United States)

    Yu, Yang; Li, Qianwen; Ma, Yanmei; Zhang, Xing; Zhu, Yongchun; Qian, Yitai

    2013-02-01

    Various LiFePO4 microstructures were synthesized via hydrothermal or solvothermal routes using different additives. In an aqueous solution, LiFePO4 spindles whose length was about 2 microm were obtained with the assistance of polyvinyl pyrrolidone (PVP). As PVP and P2O7(4-) added in water, ellipsoidal LiFePO4 particles which composed of nanoparticles around 100 nm in diameter were obtained. If the additive was cetyltrimethyl ammonium bromide (CTAB), sheet-like LiFePO4 crystals with the width of 100 nm were prepared. In the mixed solvents of water together with ethanol or acetylacetone, when adding CTAB or polyethylene glycol (20000), LiFePO4 plates or nanoparticles were obtained. The ellipsoidal LiFePO4 had the best electrochemical properties among all these products. It is found that the annealed samples were significantly better than the corresponding unannealed ones. Take the ellipsoidal LiFePO4 for example, the initial discharge capacity of annealed (161 mAh/g) was much higher than the unannealed ones (85 mAh/g) at 0.1 C and the former cell still could deliver a capacity of 143 mAh/g after 30 cycles.

  8. Unlocking the energy capabilities of micron-sized LiFePO4.

    Science.gov (United States)

    Guo, Limin; Zhang, Yelong; Wang, Jiawei; Ma, Lipo; Ma, Shunchao; Zhang, Yantao; Wang, Erkang; Bi, Yujing; Wang, Deyu; McKee, William C; Xu, Ye; Chen, Jitao; Zhang, Qinghua; Nan, Cewen; Gu, Lin; Bruce, Peter G; Peng, Zhangquan

    2015-08-03

    Utilization of LiFePO4 as a cathode material for Li-ion batteries often requires size nanonization coupled with calcination-based carbon coating to improve its electrochemical performance, which, however, is usually at the expense of tap density and may be environmentally problematic. Here we report the utilization of micron-sized LiFePO4, which has a higher tap density than its nano-sized siblings, by forming a conducting polymer coating on its surface with a greener diazonium chemistry. Specifically, micron-sized LiFePO4 particles have been uniformly coated with a thin polyphenylene film via the spontaneous reaction between LiFePO4 and an aromatic diazonium salt of benzenediazonium tetrafluoroborate. The coated micron-sized LiFePO4, compared with its pristine counterpart, has shown improved electrical conductivity, high rate capability and excellent cyclability when used as a 'carbon additive free' cathode material for rechargeable Li-ion batteries. The bonding mechanism of polyphenylene to LiFePO4/FePO4 has been understood with density functional theory calculations.

  9. New Media E/PO: Building a Digital Astronomy Community

    Science.gov (United States)

    Gay, Pamela L.

    2008-05-01

    Today's communications landscape is rich with new technologies. Cell phones and laptops are the constant companions of content consumers, and as we plan tomorrow's Education and Public Outreach programs, we need to consider how to most effectively utilize these technologies with their new, dynamic content possibilities - We need to use New Media. The field of New Media includes dynamic content sites such as: blogs, pod/vodcasts, Flickr, Facebook, Ustream, Twitter, and Second Life. The first part of this talk will summarize what New Media is available in the field of astronomy. All new media technologies have one thing in common: Users can easily create and input their own content and/or comments. These new media users and content contributors can just as easily be professional researchers, E/PO professionals, amateur astronomers, stay-at-home parents, and school kids. All are welcome in the online community, and today, all voices are digitally joined in the cacophony of astronomy new media content. This rich diversity supports many opportunities for learning, mentoring, content distribution, and discussion of ideas (including the debunking of bad ideas). In the second half of this talk, ways to use new media to build a community that shares, promotes, and comments on content is discussed, and techniques for dealing with the high flux of content are outlined. Also covered are the considerations that need to be made to make content as broadly accessible as possible.

  10. EduBites: Cliffs Notes for E/PO

    Science.gov (United States)

    Brinkworth, Carolyn; Bartolone, L.; Wenger, M.; Martin, A.; Nichols-Yehling, M.; Hurt, R. L.; Squires, G. K.

    2013-01-01

    We present a new resource for the astronomy education community, with the goal of improving our community’s knowledge and understanding of the educational research papers relevant to our work. EduBites is a searchable database of summaries of peer-reviewed education papers, written by astronomy educators and posted for the entire community to use. While we are all aware that we should be basing our E/PO work on a solid research foundation, many people in the community are pushed for time when it comes to staying on top of the educational literature. EduBites aims to reduce that workload for the benefit of the entire community. Our database is small, but growing, and will ultimately tackle papers across the whole of the astronomy education spectrum, including formal and informal education, outreach, grades K-16, pedagogy, evaluation, and many other topics. We are keen to hear from anyone on the community who would be interested in joining our review team, and welcome feedback on the EduBites user experience.

  11. La academia poética Musa Musae

    Directory of Open Access Journals (Sweden)

    Federico Utrera

    2012-03-01

    Full Text Available La academia poética Musa Musae, primera tertulia cultural de calado formada tras la guerra civil española, pues abrió sus puertas el 17 de enero de 1940, diez meses y medio después de finalizada oficialmente la contienda (1 de abril de 1939, fue un tímido y frustrado intento por sentar las bases de una futura reconciliación nacional sobre utópicos y románticos presupuestos literarios y artísticos. Denostada por sus críticos, en este artículo se fija y contextualiza su aparición y participantes, se reúnen diferentes testimonios de asistentes, algunos de ellos inéditos o poco conocidos, y se definen sus principales características como la pionera iniciativa literaria de los sectores más aperturistas y conciliadores del régimen, sucediéndole la revista Escorial, las tertulias del Café Gijón y el suplemento cultural del diario Arriba en una España destruida y con sus heridas bélicas aún abiertas, pues su exilio percibía todos estos movimientos con bastante escepticismo.

  12. LiFePO4 nanoparticles encapsulated in graphene nanoshells for high-performance lithium-ion battery cathodes.

    Science.gov (United States)

    Fei, Huilong; Peng, Zhiwei; Yang, Yang; Li, Lei; Raji, Abdul-Rahman O; Samuel, Errol L G; Tour, James M

    2014-07-11

    LiFePO4 encapsulated in graphene nanoshells (LiFePO4@GNS) nanoparticles were synthesized by solid state reaction between graphene-coated Fe nanoparticles and LiH2PO4. The resulting nanocomposite was demonstrated to be a superior lithium-ion battery cathode with improved cycle and rate performances.

  13. A Teoria Fundamentada nos Dados nos estudos de Pós-Graduação Stricto Sensu da Enfermagem brasileira

    Directory of Open Access Journals (Sweden)

    Marcelle Miranda da Silva

    2011-12-01

    Full Text Available Estudo documental e quantitativo, que objetivou identificar as teses e dissertações defendidas nos Programas de Pós- Graduação em Enfermagem do Brasil que utilizaram o referencial metodológico da Teoria Fundamentada nos Dados (TFD e analisar os aspectos epistemológicos destacados. Os dados foram coletados no Banco de Teses da CAPES, no recorte temporal entre 1996 a 2010. Foram levantados 99 resumos. Realizou-se a leitura analítica dos mesmos para constituição do tema ou problema da pesquisa e do enquadramento teórico. O maior número de produção foi em 2005, na soma dos dois níveis acadêmicos, e 54% das defesas foram sediadas na USP. As áreas temáticas mais expressivas foram: Saúde da Criança/Adolescente; Gestão em Saúde/Enfermagem; Saúde Coletiva e Saúde da Mulher. O principal referencial teórico utilizado foi o Interacionismo Simbólico. A TFD compreende uma metodologia que pode ser empregada na enfermagem, capaz de contribuir no desenvolvimento de novas investigações para o seu aprimoramento contínuo.

  14. Elementos poéticos de um conto de Caio Fernando Abreu e sua tradução para a língua inglesa

    Directory of Open Access Journals (Sweden)

    Lara Souto Santana

    2016-08-01

    Full Text Available Caio Fernando Abreu (1948-1996 tem sua obra composta predominantemente por contos. Este artigo pretende analisar os aspectos poéticos que perpassam um deles: “Sem Ana, blues”, publicado no livro Os dragões não conhecem o paraíso em 1988 e verificar de que forma sua tradução para língua inglesa – “Blues without Ana” –, feita por David Treece e publicada no livro Dragons... em 1990 na Inglaterra, foi apresentada ao leitor do conto na língua citada. Tais elementos fazem a narrativa ser mais que uma história sobre solidão. Lembramos ainda que nossas observações se darão sempre sob ponto de vista de leitores do texto em língua portuguesa. Palavras-chave: Sem Ana, Blues, Blues without Ana, Caio Fernando Abreu, tradução, Poesia.

  15. Al Berto e F. Antonino Bacelar: o erotismo em devaneio

    Directory of Open Access Journals (Sweden)

    Kenedi Santos Azevedo

    2013-12-01

    Full Text Available Em um trabalho de teor comparatista, pretende-se fazer a leitura das obras do poeta português Al Berto, O Medo, de 2009, e do amazonense F. Antonino Bacelar, Na flor do maracujá: contos e poemas, de 2010, averiguando a forma que ambos expressam o erotismo em seus poemas. Al Berto, por exemplo, se utiliza das manifestações homoafetivas, em meio ao devaneio, ao delírio, e ao real, instituindo, assim, uma nova dicção no fazer poético contemporâneo de Portugal. Enquanto F. Antonino Bacelar ilustra experiências e sonhos eróticos cujos momentos pueris retornam por meio das recordações de figuras femininas, com corpos sensuais e olhar inebriante, revelando voluptuosos instantes de prazer na juventude. Para tanto, serão utilizadas obras teóricas que sustentem os objetivos deste estudo, como Ética, sexualidade e política, de Michel Foucault, Leituras do sexo, organizado por Christine Greiner e Claudia Amorim, além de Literatura e homoerotismo em questão, de José Carlos Barcellos e A dupla chama: amor e erotismo, de Octávio Paz.

  16. Contribution of plated-out 218Po and 214Po to measurements of airborne 222Rn and daughters with plastic (CR-39) nuclear track detectors

    Science.gov (United States)

    Kahn, Bernd; Wang, Zuoyuan; Sensistaffar, Edwin

    1984-01-01

    The fraction of alpha-particle tracks due to radioactivity plated out on its surface was measured for CR-39 nuclear track detector foils used to determine working level values in air. Bare foils were exposed to known concentrations of airborne 222Rn and its short-lived daughters in a calibration chamber. The amounts of 218Po and 214Po on the foil surface were measured with a calibrated diffused junction detector-spectrometer system immediately after the foils were removed from the chamber. Deposition was mostly by 218Po, with some 214Pb but essentially no 214Bi. The track density due to the plated-out radionuclides and the 222Rn, 218Po, and 214Po in chamber air was calculated and compared to the value measured by electrochemical etching. The calculated values generally were slightly above the measured values. On the basis of these calculations, the deposited radioactivity contributed slightly less than one-half of the total tracks in one test and slightly more than two-thirds in another. This effect complicates calibration of the detector relative to airborne radon daughters.

  17. Suplementação de antioxidantes: enfoque em queimados Antioxidant supplementation: focusing on burned patients

    Directory of Open Access Journals (Sweden)

    Eliana Barbosa

    2007-12-01

    Full Text Available Na queimadura, os radicais livres são produzidos durante a reposição de fluídos, alterando numerosos componentes, como os ácidos nucléicos, os lipídios e as proteínas. Sendo assim, se, por um lado, essa restauração do fluxo sanguíneo é, em geral, necessária para recuperar a função celular normal, por outro lado a reintrodução do sangue oxigenado nos tecidos isquêmicos contribui para uma produção excessiva de radicais livres derivados do oxigênio, exacerbando a lesão mediada pela isquemia. O papel dos neutrófilos ativados na célula após a queimadura também tem recebido atenção especial. A partir do sistema NADPH oxidase os neutrófilos aderidos podem produzir uma explosão de radical superóxido, produzindo um dano tecidual importante. A queimadura, além de aumentar a produção de radicais livres, também é capaz de impedir os mecanismos de defesa antioxidante, submetendo o paciente queimado ao estresse oxidativo, o qual se constitui em fator perpetuante da resposta inflamatória sistêmica, levando à piora progressiva do estado metabólico. Com esses dados, objetiva-se revisar os principais estudos com a suplementação de antioxidantes em pacientes críticos, com ênfase em pacientes queimados, e descrever os possíveis benefícios dessa intervenção.In burn injuries, free radicals are produced during fluid replacement, altering multiple components of the organism such as nucleic acids, lipids and proteins. Thus, if on the one hand restoring blood flow is generally necessary to recover normal cell function, on the other hand oxygen reperfusion into ischemic tissues triggers massive production of oxygen free radicals, therefore further exacerbating ischemic injury. The role of neutrophiles activated in the cell after burns has also received special attention. By means of the NADPH-oxidase system, adherent neutrophiles may release superoxide radicals inflicting major tissue damage. The burn injury not only

  18. Morphology and conductivity study of solid electrolyte Li{sub 3}PO{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Prayogi, Lugas Dwi, E-mail: ldprayodi@gmail.com; Faisal, Muhamad [Engineering Physics, Sepuluh Nopember Institute of Technology ITS Campus, Sukolilo, Surabaya 6011 (Indonesia); Kartini, Evvy, E-mail: kartini@batan.go.id; Honggowiranto, Wagiyo; Supardi [Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency Kawasan Puspiptek Serpong, Tangerang Selatan15314, Banten (Indonesia)

    2016-02-08

    The comparison between two different methods of synthesize of solid electrolyte Li{sub 3}PO{sub 4} as precursor material for developing lithium ion battery, has been performed. The first method is to synthesize Li{sub 3}PO{sub 4} prepared by wet chemical reaction from LiOH and H{sub 3}PO{sub 4} which provide facile, abundant available resource, low cost, and low toxicity. The second method is solid state reaction prepared by Li{sub 2}CO{sub 3} and NH{sub 4}H{sub 2}PO{sub 4.} In addition, the possible morphology identification of comparison between two different methods will also be discussed. The composition, morphology, and additional identification phase and another compound of Li{sub 3}PO{sub 4} powder products from two different reaction are characterized by SEM, EDS, and EIS. The Li{sub 3}PO{sub 4} powder produced from wet reaction and solid state reaction have an average diameter of 0.834 – 7.81 µm and 2.15 – 17.3 µm, respectively. The density of Li{sub 3}PO{sub 4} prepared by wet chemical reaction is 2.238 gr/cm{sup 3}, little bit lower than the sample prepared by solid state reaction which density is 2.3560 gr/cm{sup 3}. The EIS measurement result shows that the conductivity of Li{sub 3}PO{sub 4} is 1.7 x 10{sup −9} S.cm{sup −1} for wet chemical reaction and 1.8 x 10{sup −10} S.cm{sup −1} for solid state reaction. The conductivity of Li{sub 3}PO{sub 4} is not quite different between those two samples even though they were prepared by different method of synthesize.

  19. Effect of conductive additives in LiFePO4 cathode for lithium-ion batteries

    Energy Technology Data Exchange (ETDEWEB)

    Shim, J.; Guerfi, A.; Zaghib, K.; Striebel, K.A.

    2003-11-25

    The electrochemical properties of LiFePO4 cathodes with different carbon contents were studied to find out the role of carbon as conductive additive. LiFePO4 cathodes containing from 0 percent to 12 percent of conductive additive (carbon black or mixture of carbon black and graphite) were cycled at different C rates. The capacity of LiFePO4 cathode increased, as conductive additive content increased. Carbon increased the utilization of active material and the electrical conductivity of electrode, but decreased volumetric capacity of electrode.

  20. Effect of conductive additives in LiFePO4 cathode for lithium-ion batteries

    OpenAIRE

    2003-01-01

    The electrochemical properties of LiFePO4 cathodes with different carbon contents were studied to find out the role of carbon as conductive additive. LiFePO4 cathodes containing from 0 percent to 12 percent of conductive additive (carbon black or mixture of carbon black and graphite) were cycled at different C rates. The capacity of LiFePO4 cathode increased, as conductive additive content increased. Carbon increased the utilization of active material and the electrical conductivity of e...

  1. RbZnFe(PO4)2: synthesis and crystal structure

    Science.gov (United States)

    Badri, Abdessalem; Ben Amara, Mongi

    2016-01-01

    A new iron phosphate, rubidium zinc iron(III) phosphate, RbZnFe(PO4)2, has been synthesized as single crystals by the flux method. This compound is isostructural to the previously reported KCoAl(PO4)2 [Chen et al. (1997 ▸). Acta Cryst. C53,1754–1756]. Its structure consists of a three-dimensional framework built up from corner-sharing PO4 and (Zn,Fe)O4 tetra­hedra. This mode of linkage forms channels parallel to the [100], [010] and [001] directions in which the Rb+ ions are located. PMID:27536385

  2. Projektiranje mestnih prometnih površin po smernicah NACTO (National Association of City Transport Officials)

    OpenAIRE

    Velkavrh, Lara

    2016-01-01

    Načrtovanje mestnih prometnih površin po NACTO sledi viziji umirjanja prometa z vizualnimi elementi. Predstavljeno bo postopno prenavljanje mestnih prometnih površin po ameriških smernicah združenja NACTO, ki je leta 2013 izdal knjigo Urban Street Design Guide. Posamezen tip obstoječih cest v urbanem okolju ( glavna mestna cesta, cesta v soseski, stanovanjska ulica v skupni rabi) lahko po korakih s posameznimi konstrukcijskimi elementi preuredimo tako, da zagotovimo večjo varnost pešcev in...

  3. Effect of Polyaniline on Electrochemical Performance of LiFePO_4

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    1 Introduction LiFePO4 has received much attention as a kind of next-generation cathode materials for lithium ion batteries. To improve its electrochemical performance, researchers have been working to overcome two major disadvantages of LiFePO4 such as the low electrical conductivity and the small Li-ion diffusivity. The latter can be solved by reducing the particle size while the former can be improved by coating a layer of carbon on the surface of LiFePO4 particles[1]. More researchers have carried o...

  4. [100]-Oriented LiFePO4 Nanoflakes toward High Rate Li-Ion Battery Cathode.

    Science.gov (United States)

    Li, Zhaojin; Peng, Zhenzhen; Zhang, Hui; Hu, Tao; Hu, Minmin; Zhu, Kongjun; Wang, Xiaohui

    2016-01-13

    [100] is believed to be a tough diffusion direction for Li(+) in LiFePO4, leading to the belief that the rate performance of [100]-oriented LiFePO4 is poor. Here we report the fabrication of 12 nm-thick [100]-oriented LiFePO4 nanoflakes by a simple one-pot solvothermal method. The nanoflakes exhibit unexpectedly excellent electrochemical performance, in stark contrast to what was previously believed. Such an exceptional result is attributed to a decreased thermodynamic transformation barrier height (Δμb) associated with increased active population.

  5. Optimized synthesis technology of LiFePO4 for Li-ion battery

    Institute of Scientific and Technical Information of China (English)

    QU Tao; TIAN Yan-wen; DING Yang; ZHONG Can-yun; ZHAI Yu-chun

    2005-01-01

    The influence of factors of the carbon black content, sintering temperature, sintering time, molar ratio of Li to Fe, as well as the electrochemical properties of LiFePO4 for lithium ion battery were studied. The only technology was obtained by using range analysis through Latin orthogonal experiment of L44 (16). The results show that the optimization synthesis technology of LiFePO4 is content of 5% doping carbon, sintering temperature of 700 ℃,molar ratio of Li to Fe of 1.03 : 1 and sintering time of 16 h. The optimized cathode synthesis techniques can make LiFePO4 have good electrochemical properties.

  6. Bulk Superconductivity and Disorder in Single Crystals of LaFePO

    Energy Technology Data Exchange (ETDEWEB)

    Analytis, James G.; Chu, Jiun-Haw; Erickson, Ann S.; Kucharczyk, Chris; /Stanford U., Appl. Phys. Dept.; Serafin, Alessandro; Carrington, Antony; /Bristol U.; Cox, Catherine; Kauzlarich, Susan M.; Hope, Hakon; /UC, Davis. Dept. Chem.

    2010-02-15

    We have studied the intrinsic normal and superconducting properties of the oxypnictide LaFePO. These samples exhibit bulk superconductivity and the evidence suggests that stoichiometric LaFePO is indeed superconducting, in contrast to other reports. We find that superconductivity is independent of the interplane residual resistivity {rho}{sub 0} and discuss the implications of this on the nature of the superconducting order parameter. Finally we find that, unlike T{sub c}, other properties in single-crystal LaFePO including the resistivity and magnetoresistance, can be very sensitive to disorder.

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

    Directory of Open Access Journals (Sweden)

    Marta Magi

    2010-06-01

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

    doi:10.4404/hystrix-20.2-4442

  8. Les Cinq Continents, a antologia de Goll: apelo (poético cosmopolita

    Directory of Open Access Journals (Sweden)

    Maria Aparecida Barbosa

    2011-12-01

    Full Text Available Este artigo trata de alguns trabalhos poéticos de Ivan Goll, publicados em alemão, francês e inglês, nos quais o diapasão cosmopolita e o apelo a uma poesia supranacional representaram um grito marginal de resistência frente às tendências totalizantes e às categorias nacionais da primeira metade do século XX. Busca-se compreender se o grito encontra respaldo nas reflexões atuais, pensando-o como um antecedente questionador de taxonomias de gênero literário e de forma artística, um transgender. Assinala que o modernista brasileiro Mário de Andrade não somente acompanhou a querela entre Goll e Breton sobre a herança do conceito Surréalisme legado por Apollinaire, como também se correspondeu e trocou livros com o poeta alsaciano, tendo recebido com entusiasmo a antologia Les Cinq continents. Ao final, este artigo apresenta a tradução de dois poemas afinados com a noção cosmopolita: "O Negro do Teatro de Variedades" e "A Canção de João Sem-Terra, O Duplo".Esta comunicación trata sobre algunos trabajos poéticos de Ivan Goll, publicados en alemán, francés e inglés, en los cuales el tono cosmopolita y el llamamiento a una poesía supranacional representaron un grito marginal de resistencia frente a las tendencias totalizantes y a las categorías nacionales de la primera mitad del siglo XX. El artículo busca comprender si el grito reverbera y encuentra respaldo en las reflexiones actuales, pensándolo como un antecedente cuestionador de taxonomías de género totalitario y, de forma artística, como un "transgender". El texto también incide en la relación establecida con el escritor modernista brasileño Mário de Andrade, que no sólo acompañó la querella entre Goll y Breton sobre la herencia del concepto "Surréalisme" legado por Apollinaire, sino que mantuvo contacto epistolar e intercambio de libros con el poeta alsaciano, y recibió con entusiasmo la antología Les Cinq continents. Finalmente, este art

  9. Biogeochemical factors affecting the presence of {sup 210}Po in groundwater

    Energy Technology Data Exchange (ETDEWEB)

    Seiler, Ralph L., E-mail: rseiler@usgs.gov [US Geological Survey, Nevada Water Science Center, 2730 N. Deer Run Road, Carson City, NV 89701 (United States); Stillings, Lisa L. [US Geological Survey, MacKay School of Mines, MS-176, University of Nevada Reno, Reno, NV 89557 (United States); Cutler, Nichole [Hydrologic Sciences Graduate Program, MS-176, University of Nevada Reno, Reno, NV 89557 (United States); Salonen, Laina; Outola, Iisa [STUK, Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-00881 Helsinki (Finland)

    2011-04-15

    Research highlights: {yields} {sup 210}Po activities in numerous domestic wells in Fallon NV exceed 500 mBq/L. {yields} {sup 210}Po levels in sediment are not the primary determinant on levels in groundwater. {yields} {delta}{sup 34}S measurements indicate SO{sub 4} reduction occurred in all {sup 210}Po contaminated wells. {yields} {sup 210}Po contaminated wells are anoxic, have high pH and low Ca. {yields} Po mobilization probably involves an anaerobic S cycle in which H{sub 2}S dissolves MnO{sub 2}. - Abstract: The discovery of natural {sup 210}Po enrichment at levels exceeding 500 mBq/L in numerous domestic wells in northern Nevada, USA, led to a geochemical investigation of the processes responsible for its mobilization. {sup 210}Po activities in 63 domestic and public-supply wells ranged from below 1 mBq/L to 6590 {+-} 590 mBq/L, among the highest reported levels in the USA. There is little spatial or depth variability in {sup 210}Pb activity in study-area sediments and mobilization of a few percent of the {sup 210}Po in the sediments would account for all of the {sup 210}Po in water. Stable-isotope measurements indicate SO{sub 4} reduction has occurred in all {sup 210}Po contaminated wells. Sulfide species are not accumulating in the groundwater in much of Lahontan Valley, probably because of S cycling involving microbial SO{sub 4} reduction, abiotic oxidation of H{sub 2}S to S{sup 0} by Mn(IV), followed by microbial disproportionation of S{sup 0} to H{sub 2}S and SO{sub 4}. The high pH, Ca depletion, MnCO{sub 3} saturation, and presence of S{sup 0} in Lahontan Valley groundwater may be consequences of the anaerobic S cycling. Consistent with data from naturally-enriched wells in Florida, {sup 210}Po activities begin to decrease when aqueous sulfide species begin to accumulate. This may be due to formation and precipitation of PoS, however, Eh-pH diagrams suggest PoS would not be stable in study-area groundwater. An alternative explanation for the study area

  10. Application of Power over Ethernet (PoE) in Lighting%以太网供电(PoE)在照明中的应用

    Institute of Scientific and Technical Information of China (English)

    高逸峰; 侯奇锋

    2016-01-01

    After introducing PoE standards including IEEE 802. 3af and IEEE 802. 3at and development of LED lighting technology, this paper discusses an emerging unique technological advantage that PoE application in conventional network equipment shifts to its application in lighting system, and puts forward the problems in subsequent use.%介绍以太网供电标准 IEEE 802.3af、IEEE 802.3at,结合LED照明技术的发展,阐述PoE供电由常规的应用于网络设备过渡到照明系统这一新兴技术独特的技术优势,提出需要在后续使用中注意的相关问题。

  11. <em>An entem>-Kaurane-Type Diterpene in <em>Croton antisyphiliticusem> Mart.

    Directory of Open Access Journals (Sweden)

    Ana Maria Pereira

    2012-07-01

    Full Text Available <em>Croton antisyphiliticus em>is a medicinal plant widely used in the treatment of microbial infections, especially those affecting the genital tract. Crude extract, fractions and pure compound isolated from roots of this species were investigated to validate their antimicrobial activity against <em>Escherichia coliem> and <em>Staphylococcus aureusem>. The compound <em>ent>-kaur-16-en-18-oic acid was isolated as a major component (0.7% of crude extract, and its MIC value determined against <em>S. aureusem> (ATCC 6538 was 250 μg/mL. This is the first phytochemical work on the species monitored with antimicrobial assay.

  12. Differential gene expression, induced by salicylic acid and Fusarium oxysporum f. sp. lycopersici infection, in tomato Expressão diferencial de genes induzida por ácido salicílico e por Fusarium oxysporum f. sp. lycopersici, em tomateiro

    Directory of Open Access Journals (Sweden)

    Daniel Oliveira Jordão do Amaral

    2008-08-01

    . A técnica SSH é eficiente em identificar genes de resistência, ativados pelo ácido salicílico e pela infecção com Fusarium oxysporum f. sp. lycopersici. A aplicação dessa técnica não apenas possibilita isolar seqüências diferencialmente expressas, a baixo custo, como também permite a identificação de novas seqüências, em tomate, a partir de um número relativamente pequeno de seqüências.

  13. Research progress of LiFePO4cathode materials for lithium-ion battery%锂离子电池正极材料LiFePO4的研究进展

    Institute of Scientific and Technical Information of China (English)

    唐致远; 王晓静; 闫继; 马莉

    2012-01-01

    LiFePO, is a strong competitor of the next generation cathode materials for many remarkable advantages. In this paper, the structure and reaction mechanism were briefly introduced and the various synthetic methods for preparation and some research progresses on improving electrochemical property of UFePO4 were summarized. The developing trend of LiFePO4 was also prospected.%LiFePO4以其显著的优点成为锂离子电池正极材料有力的竞争者.介绍LiFePO4正极材料的结构和反应机理,综述制备LiFePO4的各种方法以及针对LiFePO4材料所进行的改进研究,并对其发展前景进行了展望.

  14. Une poésie pour tous les langages artistiques : poéticité et lecture numériques

    Directory of Open Access Journals (Sweden)

    Begoña Regueiro Salgado

    2011-02-01

    Full Text Available Ce travail examine les concepts de poéticité et de littérarité appliqués aux poètes numériques : il analyse de façon comparatiste les œuvres de Philippe Bootz, Belén Gache et Óscar Martín Centeno afin de distinguer les traits qui définissent la poésie numérique. L’article montre quels éléments de poéticité sont restés immuables, nous permettant de continuer à appeler poésie ces nouvelles formes numériques, et quels sont les traits qui ont fait avancer le concept de poéticité au point de nous obliger à redéfinir certaines des caractéristiques de ce que nous considérons traditionnellement comme littérature.This essay analyses the concepts of poeticity and literarity in digital poetry by meains of a comparative analysis of the works by Philippe Bootz, Belén Gache and Óscar Martín Centeno in order to isolate the features that define digital poetry. On the basis of this analysis, the essay then tries to demonstrate which elements of poeticity remain that allow us to continue to classify as poetry its new digital manifestations, and which elements have changed, so as to make us modify the idea of poeticity and to redefine what we have traditionally understood as literature.

  15. CONSCIÊNCIA E INSPIRAÇÃO COMO POSSIBILIDADES POÉTICAS EM MÁRIO QUINTANA

    Directory of Open Access Journals (Sweden)

    Tânia Winch Lisbôa

    2010-01-01

    Full Text Available RESUMO Criação poética é trabalho racional ou inspiração divina? Encontrar a resposta para esse questionamento é a mola propulsora deste estudo. Buscando respondê-la, desenvolvemos um texto que aborda o fazer poético, considerando tanto a perspectiva do abandono à inspiração quanto da produção consciente e do trabalho rigoroso do poeta. Para dar sustentação às duas linhas de pensamento, privilegiamos como referencial teórico, textos de Platão, Edgar Allan Poe, Paul Valéry, Hugo Friedrich, Octavio Paz e Jorge Larrosa. Além do estudo teórico, o texto focaliza a produção literária de Mario Quintana, tomando como objeto de análise poemas do autor. Sem perder de vista as questões relacionadas à inspiração e à construção artística consciente, procuramos identificar como, nos textos analisados, se processa o fazer poético. Visando iluminar o ato de criação em Quintana, investigamos como inspiração e técnica se mesclam ao transformar a vida em matéria poética e nos permitem constatar que é possível aliar liberdade poética e consciência artística, tanto em termos estéticos quanto temáticos.

  16. Morphology control of FePO4 synthesized by co-precipitation%沉淀法制备FePO4的形貌控制

    Institute of Scientific and Technical Information of China (English)

    陈召勇; 王文华; 朱华丽; 杜柄林; 王航; 熊礼俊; 张建利

    2013-01-01

    FePO4 was synthesized by precipitation method using FeCl3 · 6H2O,FeSO4 ·7H2O,Fe(NO3)3 · 9H2O as iron sources and NH4H2PO4,H3PO4,(NH4)3PO4 · 3H2O as phosphorus sources.The effects of pH value,reaction temperature and surfactant on morphology of iron phosphate were investigated.The prepared samples were characterized by XRD and SEM.The results show that the control on morphology and size of FePO4 can be achieved by selecting iron sources,phosphorus sources,surfactant,pH value and so on.Using H3PO4 as phosphorus source and FeCl3 · 6H2O as iron source,uniform dispersion of dendrob shape iron phosphate can be observed when pH<1 and self-assembly disks shape iron phosphate can be obtained afer adding PEG.while pH>1,the iron phosphate particles were of nest shape.Using FeSO4 · 7H2O as iron source was also particles with nest shape;while using Fe(NO3)3 · 9H2 O as iron source as flower-likely pariticles,irregular lamellar iron phosphate can be obtained when using FeCl3 · 6H2O as iron source and (NH4)3PO4 ·3H2O as phosphorus source,while using FeSO4 · 7H2O as iron source and NH4H2PO4 as phosphorus source was particles with nearly spherical-like shape.Lamellar iron phosphate can be synthesized in the help of the surfactant.%分别以FeCl3·6H2O,FeSO4·7H2O和Fe(NO3)3·9H2O为铁源,NH4H2PO4,H3PO4和(NH4)3PO4·3H2O为磷源,用沉淀法制备了FePO4.研究了沉淀过程中原料、pH值以及表面活性剂对FePO4形貌的影响.采用x射线衍射、扫描电镜分别对样品的物相、形貌进行表征.研究结果表明,FePO4的形貌控制可以通过铁源、磷源、表面活性剂的选择和pH值等的控制来实现.H3PO4为磷源,以FeCl3·6H2O为铁源,当pH<1时,制备的样品为均匀的铁皮石斛形,加入PEG后为自组装的圆片状,当pH>1时,形貌为鸟巢形;以FeSO4·7H2O为铁源制备的样品形貌也以鸟巢形为主;以Fe(NO3)3·9H2O为铁源制备的样品表现为花状;以FeCl3·6H2O为铁源、(NH4)3PO4·3H2O

  17. Vanishing of T sub c and appearance of quantum paraelectricity in KD sub 2 PO sub 4 and KH sub 2 PO sub 4 under high pressure

    CERN Document Server

    Endo, S; Tokunaga, M

    2002-01-01

    The temperature dependences of the dielectric constants of the hydrogen-bond ferroelectrics KH sub 2 PO sub 4 (KDP) and KD sub 2 PO sub 4 (DKDP) were measured under high hydrostatic pressure. Their ferroelectric transition temperatures T sub c monotonically decreased with increasing pressure and the ferroelectric state vanished at p sub c : 1.7 GPa for KDP and 6.1 GPa for DKDP. On the other hand, the Curie constant remained finite at p sub c , which indicates that the ferroelectric phase transition at high pressure is of displacive type. At pressures around p sub c , quantum paraelectricity was observed in KDP and DKDP.

  18. Characteristics of brown carbon in the urban Po Valley atmosphere

    Science.gov (United States)

    Costabile, Francesca; Gilardoni, Stefania; Barnaba, Francesca; Di Ianni, Antonio; Di Liberto, Luca; Dionisi, Davide; Manigrasso, Maurizio; Paglione, Marco; Poluzzi, Vanes; Rinaldi, Matteo; Facchini, Maria Cristina; Gobbi, Gian Paolo

    2017-01-01

    We investigate optical-microphysical-chemical properties of brown carbon (BrC) in the urban ambient atmosphere of the Po Valley. In situ ground measurements of aerosol spectral optical properties, PM1 chemical composition (HR-ToF-AMS), and particle size distributions were carried out in Bologna. BrC was identified through its wavelength dependence of light absorption at visible wavelengths, as indicated by the absorption Ångström exponent (AAE). We found that BrC occurs in particles with a narrow monomodal size distribution peaking in the droplet mode, enriched in ammonium nitrate and poor in black carbon (BC), with a strong dependance on OA-to-BC ratios, and SSA530 of 0.98 ± 0.01. We demonstrate that specific complex refractive index values (k530 = 0.017 ± 0.001) are necessary in addition to a proper particle size range to match the large AAEs measured for this BrC (AAE467 - 660 = 3.2 ± 0.9 with values up to 5.3). In terms of consistency of these findings with literature, this study i. provides experimental evidence of the size distribution of BrC associated with the formation of secondary aerosol;ii. shows that in the lower troposphere AAE increases with increasing OA-to-BC ratios rather than with increasing OA - contributing to sky radiometer retrieval techniques (e.g., AERONET);iii. extends the dependence of AAE on BC-to-OA ratios previously observed in chamber experiments to ambient aerosol dominated by wood-burning emissions. These findings are expected to bear important implications for atmospheric modeling studies and remote sensing observations as regards the parametrization and identification of BrC in the atmosphere.

  19. Eudragit RS PO nanoparticles for sustained release of pyridostigmine bromide

    Energy Technology Data Exchange (ETDEWEB)

    Hoobakht, Fatemeh; Ganji, Fariba, E-mail: fganji@modares.ac.ir; Vasheghani-Farahani, Ebrahim [Tarbiat Modares University, Biomedical Engineering Group, Chemical Engineering Department (Iran, Islamic Republic of); Mousavi, Seyyed Mohammad [Tarbiat Modares University, Biotechnology Group, Chemical Engineering Department (Iran, Islamic Republic of)

    2013-09-15

    Pyridostigmine bromide (PB) is an inhibitor of cholinesterase, which is used in the treatment of myasthenia gravis and administered for protection against exposure to toxic nerve agents. Tests were done to investigate prolonging the half-life of PB and improving its release behavior. PB was loaded in nanoparticles (NPs) of Eudragit RS PO (Eu-RS) prepared using the technique of quasi emulsion solvent diffusion. Variables of output power of the sonicator, bath temperature and mixing time, were chosen as the optimization factors to obtain the minimum sized NPs. In addition, emulsions were tested at different ratios of drug-to-polymer by dynamic light scattering to determine size and zeta potential of NPs. UV-spectroscopy was used to determine PB content of the NPs. Drug-loaded NPs were characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectra. Results determined that mixing time had a significant impact on the size of Eu-RS NPs, but power output of sonicator and bath temperature had no significant effect. The particle size obtained at the optimum condition (power output of 70 W, bath temperature of 33 Degree-Sign C, and mixing time of 7 min) was less than 200 nm (optimum sizes were 138.9 and 179.5 nm for Eu-RS and PB-loaded Eu-RS NPs, respectively). The optimum PB-loaded Eu-RS NPs at the PB to Eu-RS weight ratio of 1-4 and 20 % of loaded PB released from the nanocarriers within 100 h.

  20. Atmospheric-dispersion parameter evaluation in the Po Valley

    Energy Technology Data Exchange (ETDEWEB)

    Bonino, G. (Turin Univ. (Italy). Ist. di Fisica; Consiglio Nazionale delle Ricerche, Turin (Italy). Lab. di Cosmo-Geofisica); Anfossi, D. (Consiglio Nazionale delle Ricerche, Turin (Italy). Lab. di Cosmo-Geofisica); Bacci, P.; Brusasca, G.; Longhetto, A. (Ente Nazionale per l' Energia Elettrica, Milan (Italy))

    Comparison of turbulent-diffusion parameters sigmasub(y) and sigmasub(z), evaluated through different experimental tests carried out in the Po Valley in the range (10/sup 2/:10/sup 4/) m downwind the source, under natural and unstable conditions, is presented and discussed. Two kinds of methods of tracer dispersion were adopted. The first one dealt with no-lift balloon diffusion in the range (10/sup 2/:10/sup 3/) m, while the second one was relative to SF/sub 6/ dispersion in the range (10/sup 3/:10/sup 4/) m. In the present paper the two sets of data are joined and a single series of best-fit curves covering the whole measured range (10/sup 2/:10/sup 4/) m is derived. The results show different behaviours for sigmasub(y) and sigmasub(z); in fact, it is possible to extrapolate sigmasub(y) trends from one set of data (SF/sub 6/) to the other one (no-lift balloons) without changing the analytical expression and the values of their coefficients. For sigmasub(z), instead, some new considerations are needed. In fact, for the unstable categories here considered (B/C and C) it is necessary to change the analytical form of the sigmasub(z) trend. This is due to the effect of convection resulting in an increase of dsigmasub(z)/d x. Finally, the exponent of the sampling time tau, in the sigmasub(y) vs. tau relationship, was found equal to 0.2, in the range (16:128) min.

  1. La obra poética de Blas de Otero

    Directory of Open Access Journals (Sweden)

    Fernando Carratalá

    2006-12-01

    Full Text Available El escritor vasco Blas de Otero (Bilbao, 15-3-1916; Majadahonda –Madrid–, 29-6- 1979 es, en opinión de amplios sectores de la crítica, uno de los poetas líricos más relevantes en el panorama de la poesía contemporánea española. Fue Premio Boscán de Poesía 1950 (Redoble de conciencia y Premio de la Crítica 1959 y Premio Fastenrath 1961 (An- cia. Otero se mantuvo al margen de grupos literarios siguiendo un camino muy personal, aunque en él aparecen las tendencias en las que crecen y maduran los nuevos poetas de la posguerra: poesía de tono religioso; poesía de intención anticlasicista y antiformalista (poesía «desarraigada», en denominación de Dámaso Alonso, en respuesta al neogarcilasismo de José García Nieto y otros poetas de la llamada «Juventud Creadora» –años 1939–1944 aproximadamente–, e iniciada en 1944 con dos grandes libros: Sombra del paraíso, de Vicente Aleixandre, e Hijos de la ira, de Dámaso Alonso, libros que traen una poesía más humana y auténtica; y la que se ha llamado poesía «social». Blas de Otero que- da inmerso en estas tres tendencias, pero sin dependencia, sin ser en ninguna de ellas un mero seguidor de una moda poética.

  2. Modelagem dinâmica e simulação computacional de poços de petróleo verticais e direcionais com elevação por bombeio mecânico

    OpenAIRE

    Filipe, C. A. Lins; Kayo, G. SIlva; Medeiros, Adelardo Adelino Dantas de; Costa, Rutácio O.

    2009-01-01

    LINS, Filipe C. A. et al. Modelagem dinâmica e simulação computacional de poços de petróleo verticais e direcionais com elevação por bombeio mecânico. In: CONGRESSO BRASILEIRO DE PESQUISA E DESENVOLVIMENTO EM PETRÓLEO E GÁS, 5. 2009, Fortaleza, CE. Anais... Fortaleza: CBPDPetro, 2009. This paper presents a dynamic model of vertical oil wells using artificial elevation by suckerrod pumping. The modeling of the system is separated by modules that provide a good understanding of the sys...

  3. Molecular cloning, structure and expressional profiles of two novel single-exon genes (PoCCR6A and PoCCR6B) in the Japanese flounder (Paralichthys olivaceus).

    Science.gov (United States)

    Wang, Lei; Zhang, Yong-zhen; Xu, Wen-teng; Jia, Xiao-dong; Chen, Song-lin

    2016-05-01

    CCR6 is an important binding receptor of CCL20 and beta-defensins, and has multiple functions in the innate and acquired immune responses. In this study, we cloned the PoCCR6A and PoCCR6B genes of the Japanese flounder and studied the gene structure and expression patterns of these two genes in bacterial infection. The full-length PoCCR6A cDNA is 1415 bp and the open reading frame (ORF) is 1113 bp, encoding a 370-amino-acid peptide. The full-length PoCCR6B cDNA is 2193 bp and the ORF is 1029 bp, encoding a 363-amino-acid peptide. The structures of PoCCR6A and PoCCR6B indicate that they are single-exon genes. The predicted proteins encoded by PoCCR6A and PoCCR6B have the typical G-protein-coupled receptor (GPCR) family signature of seven transmembrane domains and several conserved structural features. A tissue distribution analysis showed that PoCCR6A is predominately expressed in the intestine, gill, and blood, and PoCCR6B in the gill, spleen, and liver. The expression patterns of the two chemokine receptors were analyzed during bacterial infection. In spleen and kidney, the expression of PoCCR6A was significantly upregulated at 24 h after infection, whereas the expression of PoCCR6B was steady at these time points. While in intestine, both of them were upregulated at 6 h-12 h after infection, and in gill the expression levels of them were upregulated at 24 h. The patterns of expression suggested that PoCCR6A and PoCCR6B play an important role in the immune response of the Japanese flounder, especially in the mucosal tissues.

  4. Geografia e poesia lírica: considerações sobre a obra "A poética do espaço", de Gaston Bachelard

    Directory of Open Access Journals (Sweden)

    Felipe Cabañas da Silva

    2015-04-01

    Full Text Available Este artigo tem como meta realizar uma leitura da obra “A poética do espaço”, do filósofo Gaston Bachelard, analisando especialmente suas possíveis contribuições a uma abordagem geográfica da poesia lírica. Tendo em vista que os estudos geográficos da literatura demonstram historicamente uma predileção pelo gênero romanesco, os geógrafos que pretendem pensar a poesia lírica devem buscar a integração de contribuições teóricas diversificadas. 

  5. Umělá inteligence v moderních počítačových hrách

    OpenAIRE

    Pavliska, Jiří

    2009-01-01

    Obsahem této bakalářské práce je návrh umělé inteligence pro moderní počítačovou hru. Snažím se seznámit čtenáře se samotným pojmem umělá inteligence. Uvádím popis prvků a technik používaných při tvorbě chování postav ovládaných počítačem. Zaměřuji se dále na prohledávání stavového prostoru a nalezení nejkratší cesty.  The aim of this bachelor's thesis is to propose an artificial inteligence that could be used to create a modern computer game. My intention is to introduce the termin Artifi...

  6. Ekspert po SMI : Nuzhno tshotko ukazõvat na zakaznoi material / Ksenia Repson

    Index Scriptorium Estoniae

    Repson, Ksenia

    2007-01-01

    Telekanalis Pervõi Baltiiskii Kanal näidatud film Keskerakonna esimehest Edgar Savisaarest " Po prozvishtshu Nossorog" oli tehtud Keskerakonna tellimusel. Meediaeksperdi Tarmu Tammerki arvamus reklaamtelesaadete või -filmide nõuete kohta

  7. Searching for “LiCr{sup II}PO{sub 4}”

    Energy Technology Data Exchange (ETDEWEB)

    Mosymow, E. [Institut für Anorganische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn (Germany); Glaum, R., E-mail: rglaum@uni-bonn.de [Institut für Anorganische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn (Germany); Kremer, R.K. [Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart (Germany)

    2014-10-15

    The two new phosphates LiCr{sup II}{sub 4}(PO{sub 4}){sub 3} and Li{sub 5}Cr{sup II}{sub 2}Cr{sup III}(PO{sub 4}){sub 4} are discovered as equilibrium phases (ϑ=800 °C) in the quarternary system Li/Cr/P/O. Their crystal structures have been determined from single-crystal X-ray diffraction data (LiCr{sup II}{sub 4}(PO{sub 4}){sub 3}: violet-blue, Pnma (no. 62), Z=4, a=6.175(1) Å, b=14.316(3) Å, c=10.277(2) Å, 100 parameters, R{sub 1}=0.028, wR{sub 2}=0.08, 2060 unique reflections with F{sub o}>4σ(F{sub o}); Li{sub 5}Cr{sup II}{sub 2}Cr{sup III}(PO{sub 4}){sub 4}: greyish-green, P1{sup ¯} (no. 2), Z=1, a=4.9379(7) Å, b=7.917(2) Å, c=8.426(2) Å, α=109.98(2)°, β=90.71(1)°, γ=104.91(1)°, 131 parameters, R{sub 1}=0.022, wR{sub 2}=0.067, 1594 unique reflections with F{sub o}>4σ(F{sub o})). Li{sub 5}Cr{sup II}{sub 2}Cr{sup III}(PO{sub 4}){sub 4} adopts an hitherto unknown structure type. The crystal structure of LiCr{sup II}{sub 4}(PO{sub 4}){sub 3} is isotypic to that of NaCd{sup II}{sub 4}(PO{sub 4}){sub 3} and related to that of the mineral silicocarnotite Ca{sub 5}(PO{sub 4}){sub 2}(SiO{sub 4}). Significant disorder between Li{sup +} and Cr{sup 2+} is observed for both crystal structures. The oxidation states assigned to chromium in these two phosphates are in agreement with UV/vis/NIR absorption spectra and magnetic susceptibility data recorded for both compounds. Instead of “LiCr{sup II}PO{sub 4}” mixtures of LiCr{sup II}{sub 4}(PO{sub 4}){sub 3}, Li{sub 5}Cr{sup II}{sub 2}Cr{sup III}(PO{sub 4}){sub 4}, Cr{sub 2}O{sub 3}, and CrP are observed at equilibrium. Instead of “Li{sub 2}Cr{sup II}P{sub 2}O{sub 7}” four-phase mixtures consisting of Li{sub 9}Cr{sup III}{sub 3}(P{sub 2}O{sub 7}){sub 3}(PO{sub 4}){sub 2}, Li{sub 3}Cr{sup III}{sub 2}(PO{sub 4}){sub 3}, LiCrP{sub 2}O{sub 7}, and CrP were obtained. - Graphical abstract: Investigations on the equilibrium relations in the system Li/Cr/P/O revealed the two hitherto unknown phosphates Li{sub 5

  8. Ekspert po SMI : Nuzhno tshotko ukazõvat na zakaznoi material / Ksenia Repson

    Index Scriptorium Estoniae

    Repson, Ksenia

    2007-01-01

    Telekanalis Pervõi Baltiiskii Kanal näidatud film Keskerakonna esimehest Edgar Savisaarest " Po prozvishtshu Nossorog" oli tehtud Keskerakonna tellimusel. Meediaeksperdi Tarmu Tammerki arvamus reklaamtelesaadete või -filmide nõuete kohta

  9. Synthesis and Photocatalytic Activity of Ag3PO4 Triangular Prism

    Directory of Open Access Journals (Sweden)

    Pengyu Dong

    2015-01-01

    Full Text Available Ag3PO4 triangular prism was synthesized by a facile chemical precipitation approach by simply adjusting external ultrasonic condition. The as-synthesized Ag3PO4 triangular prism was characterized by X-ray diffraction pattern (XRD, field emission scanning electron microscopy (SEM, fourier transform infrared (FTIR spectra, and ultraviolet-visible diffuse reflectance (UV-vis DRS absorption spectra. The photocatalytic activity of Ag3PO4 triangular prism was evaluated by photodegradation of organic methylene blue (MB, rhodamine B (RhB, and phenol under visible light irradiation. Results showed that Ag3PO4 triangular prism exhibited higher photocatalytic activity than N-doped TiO2 and commercial TiO2 (P25 under visible light irradiation.

  10. Hydrothermal Synthesis and Characterization of Nd Doped One-dimensional Hexagonal CePO_4 Nanowires

    Institute of Scientific and Technical Information of China (English)

    张新奇

    2012-01-01

    One-dimensional Nd doped CePO4 hexagonal nanowires have been synthesized for the first time at 140 ℃ for 24 hours via a hydrothermal method using P123 surfactant as the template.The products were characterized by X-ray diffraction,transmission electron microscopy,photoluminescence and high-resolution transmission electron microscopy.Compared with CePO4,one-dimensional nanomaterials we have synthesized,Nd doped CePO4 nanomaterials remain their hexagonal one-dimensional morphology and smooth surface.However,their photoluminescence emissions are greatly enhanced at the wavelength of 348 nm.With their novel fluorescence-emission property,the Nd doped CePO4 nanomaterials are potential in many fields such as optics and electronics.

  11. Carbon coatings with olive oil, soybean oil and butter on nano-LiFePO 4

    Science.gov (United States)

    Kim, Ketack; Jeong, Ji Hwa; Kim, Ick-Jun; Kim, Hyun-Soo

    Kitchen oils (olive, soybean and butter) are selected for carbon coatings on LiFePO 4. The surface properties of LiFePO 4 are unknown or vary depending on synthetic methods. The multi-functional groups of fatty acids in the oils can orient properly to cope with the variable surface properties of LiFePO 4, which can lead to dense carbon coatings. The low price and low toxicity of kitchen oils are other advantages of the coating process. LiFePO 4 (D 50 = 121 nm)combined with the carbon coating enhances the rate capability. Capacities at the 2 C rate reach 150 mAh g -1 or higher. The charge retention values of 2.0 C/0.2 C are between 94.4 and 98.9%.

  12. SHG Materials Based on the AlPO4-5 Single Crystals

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Large AlPO4-5 molecular sieve single crystals with high optical quality were synthesized hydrothermally by using TPA as template. As-synthesized crystals were calcined under O2 atmosphere to remove the organic templates in the channels. Disperse-Red-1 (DR1) and p-nitroaniline (pNA) molecules have been successfully incorporated into the one-dimensional channels of AlPO4-5 single crystals respectively by means of vapor phase diffusion. XRD patterns reveal that the loading of organic molecules has not destroyed the structures of AlPO4-5 crystals. Polarizing microscope and SHG results indicate that the DR1 and pNA molecules are well aligned in a preferred direction along the crystal channels. The different polarization-dependence SH intensity shows that different SHG processes occur in the DR1- and pNA-loaded AlPO4-5 crystals.

  13. Dispersion, agglomeration, and gelation of LiFePO4 in water-based slurry

    Science.gov (United States)

    Tsai, Feng-Yen; Jhang, Jia-Hao; Hsieh, Han-Wei; Li, Chia-Chen

    2016-04-01

    The gelation of commercially available lithium iron phosphate (LiFePO4) in water-based slurry and its corresponding mechanism are studied. Based on surface chemistry analyses using zeta potential measurements and Fourier transform infrared spectroscopy, it is found that the key factor that causes LiFePO4 gelation in the aqueous slurry is the quality of the surface carbon coating on powder. When the surface carbon exhibits functional derivatives, such as carboxyl, hydroxyl, and carbonyl polar functional groups, LiFePO4 tends to form a three-dimensional, gel-like structure via hydrogen bonding. Moreover, the presence of the derivatives reduces the amount of conduction-favorable sp2-bonded carbon to LiFePO4, resulting in an electric resistance increase of the as-prepared electrode and the deterioration of the specific capacity of the as-constructed cell.

  14. Anode property of carbon coated LiFePO4 nanocrystals

    Science.gov (United States)

    Ni, Jiangfeng; Jiang, Jiaxing; Savilov, S. V.; Aldoshin, S. M.

    2016-10-01

    Nanostructured LiFePO4 is appealing cathode material for rechargeable lithium batteries. Herein, however, we report the intriguing anode properties of carbon coated LiFePO4 nanocrystals. In the potential range of 0-3.0 V, the LiFePO4 nanocrystal electrodes afford high reversible capacity of 373 mAhg-1 at a current rate of 0.05 Ag-1 and retains 239 mAhg-1 at a much higher rate of 1.25 Ag-1. In addition, it is capable of sustaining 1000 cycles at 1.25 Ag-1 without any capacity fading. Such superior properties indicate that nanostructured LiFePO4 could also be promising anode for rechargeable battery applications.

  15. Cell permeable fluorescent receptor for detection of H2PO4(-) in aqueous solvent.

    Science.gov (United States)

    Sen, Supriti; Mukherjee, Manjira; Chakrabarty, Kuheli; Hauli, Ipsit; Mukhopadhyay, Subhra Kanti; Chattopadhyay, Pabitra

    2013-03-07

    A new colorimetric fluorescent receptor for H(2)PO(4)(-) is reported in this communication. The receptor can detect dihydrogen phosphates optically by developing a color change from yellow to green. Acute spectral responses to H(2)PO(4)(-) in HEPES buffer (DMSO-HEPES 1:9) have been observed. The selectivity zone in terms of pH of the receptor for H(2)PO(4)(-) is attributed to the fitness in the acidity (pK(a)) of receptor with H(2)PO(4)(-). Hydrogen bonding plays the key role here which is confirmed by (1)H NMR titration. The receptor also has good potential for bio-imaging. The mode of interaction has also been established by ab initio calculation.

  16. Biocarbon-coated LiFePO4 nucleus nanoparticles enhancing electrochemical performances

    DEFF Research Database (Denmark)

    Zhang, X.G.; Zhang, X.D.; He, W.

    2012-01-01

    We report a green biomimetic method to synthesize biocarbon-coated LiFePO4 nucleus nanoparticles using yeast cells as both a structural template and a biocarbon source for high-power lithium-ion batteries....

  17. PoP模块芯片级测试方案

    Institute of Scientific and Technical Information of China (English)

    郑强

    2011-01-01

    PoP器件以它集成度高且封装体积小成为3G产品首选的关键部件。目前,如何去测试和判定PoP在模块级的状态在各工厂中还尚属空白。本文将就PoP器件在使用中出现的问题及如何设计一种方案去测试和判定PoP在使用前的预知状态做较为详实的分析和介绍。

  18. Peroxidase-like catalytic activity of Ag3PO4 nanocrystals prepared by a colloidal route.

    Directory of Open Access Journals (Sweden)

    Yuanjun Liu

    Full Text Available Nearly monodispersed Ag3PO4 nanocrystals with size of 10 nm were prepared through a colloidal chemical route. It was proven that the synthesized Ag3PO4 nanoparticles have intrinsic peroxidase-like catalytic activity. They can quickly catalyze oxidation of the peroxidase substrate 3, 3, 5, 5-tetramethylbenzidine (TMB in the presence of H2O2, producing a blue color. The catalysis reaction follows Michaelis-Menten kinetics. The calculated kinetic parameters indicate a high catalytic activity and the strong affinity of Ag3PO4 nanocrystals to the substrate (TMB. These results suggest the potential applications of Ag3PO4 nanocrystals in fields such as biotechnology, environmental chemistry, and medicine.

  19. Inelastic neutron scattering and lattice dynamics of GaPO4

    Indian Academy of Sciences (India)

    R Mittal; S L Chaplot; A I Kolesnikov; C-K Loong; O D Jayakumar; S K Kulshreshtha

    2004-08-01

    We report here measurements of phonon spectrum and lattice dynamical calculations for GaPO4. The measurements in low-cristobalite phase of GaPO4 are carried out using high-resolution medium-energy chopper spectrometer at ANL, USA in the energy transfer range 0–160 meV. Semiempirical interatomic potential in GaPO4, previously determined using ab-initio calculations have been widely used in studying the phase transitions among various polymorphs. The calculated phonon spectrum using the available potential show fair agreement with the experimental data. However, the agreement between the two is improved by including the polarisability of the oxygen atoms in the framework of the shell model. The lattice dynamical models are also exploited for calculations of various thermodynamic properties of GaPO4.

  20. Biocarbon-coated LiFePO4 nucleus nanoparticles enhancing electrochemical performances

    DEFF Research Database (Denmark)

    Zhang, X.G.; Zhang, X.D.; He, W.

    2012-01-01

    We report a green biomimetic method to synthesize biocarbon-coated LiFePO4 nucleus nanoparticles using yeast cells as both a structural template and a biocarbon source for high-power lithium-ion batteries....

  1. Estudo do efeito da colostomia proximal terminal na cicatrização de anastomoses colo-cólicas em ratos

    Directory of Open Access Journals (Sweden)

    Leme Marcelo Betim Paes

    2002-01-01

    Full Text Available OBJETIVO: Estudar os efeitos da colostomia proximal terminal na cicatrização de anastomoses colo-cólicas em ratos. MÉTODOS: 36 ratas foram divididas em 2 grupos: grupo controle (C com 12 animais submetidos à ressecção cólica segmentar seguida de anastomose colo-cólica primária, e grupo colostomizado (CZ com 24 animais submetidos ao mesmo procedimento do grupo C complementado com uma colostomia proximal. A cicatrização anastomótica foi avaliada em dois períodos distintos, 2º e 7º dias de pós-operatório (PO, em relação à deiscência anastomótica, aderências, epitelização mucosa, pressão de ruptura e variáveis histológicas. Os resultados foram submetidos a estudo estatístico considerando-se como significante valores de p<0,05. RESULTADOS: A deiscência, principal variável analisada nessa pesquisa, não ocorreu em ambos os grupos estudados. As aderências foram significantemente mais intensas no grupo C no 7º PO. Nos dois grupos, a ruptura intestinal sempre ocorreu ao nível da anastomose no 2º PO; no 7º PO, a maior parte das rupturas aconteceram na alça cólica fora da zona anastomótica (100% do grupo C e 70% do grupo CZ. A análise das demais variáveis demonstrou equivalência entre os dois grupos. CONCLUSÃO: Os resultados dessa pesquisa não demonstraram diferença significante entre anastomoses colo-cólicas em ratos associados ou não à colostomia proximal.

  2. Determination of Po-210 content in cigarette smoke using a smoking machine: A case study of Iranian cigarettes.

    Science.gov (United States)

    Horváth, Mária; Shahrokhi, Amin; Bátor, Péter; Tóth-Bodrogi, Edit; Kovács, Tibor

    2017-08-01

    The Po-210 content of tobacco has been known for a long time, however, different results can be found about the estimated amount of Po-210 that is inhaled by humans as a result of smoking cigarettes. Because of the unique properties of Po-210, the smoking machines available on the market are not suitable because of their failure to quantitatively collect Po-210 for measurement. Therefore, to estimate precisely the amount of Po-210 entering the lungs as a result of smoking, a smoking machine and sampling protocol based on relevant ISO standards - ISO-3308, ISO-3402 and ISO-4387 - was developed. A 5% HCl solution was found to be the best absorber of Po-210 from smoke. Seventeen different brands of cigarettes distributed in Iran were used to validate the new machine and sampling protocol. The Po-210 concentration was determined by alpha spectrometry; the cigarette smoke solution underwent combined acid treatment after adding a Po-209 tracer. The Po-210 activity concentration of cigarettes sold in Iran was between 9.7 ± 1.2 and 26.5 ± 4.6 mBq/cigarette and it was determined that there was no relationship between the Po-210 and nicotine contents of cigarette smoke. Additionally, it was found that 15 ± 10% of the cigarette Po-210 was transferred to the mainstream smoke. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Nanocomposite of LiFePO4 and mesoporous carbon for high power cathode of lithium rechargeable batteries.

    Science.gov (United States)

    Kim, Jun-Il; Roh, Kwang Chul; Lee, Jae-Won

    2012-11-01

    A composite of LiFePO4 and MgO-templated disordered mesoporous carbon was prepared through infiltrating a LiFePO4 precursor solution into the mesoporous carbon and growing LiFePO4 nanocrystals in the pore of the carbon. Transmission electron microscope (TEM) and scanning electron microscope (SEM) analysis showed that LiFePO4 nanoparticles are embedded homogeneously in the mesoporous carbon without formation of big LiFePO4 particles out of the pores. The pores of the carbon are believed to suppress crystal growth of LiFePO4. The 3-dimensional conducting carbon network between the LiFePO4 nanoparticles led to excellent cycling stability and rate capability. The composite showed no fade of discharge capacity up to 100 cycles and 85% of the reversible capacity at 0.1 C was retained at 30 C.

  4. Synthesis and characterization of Carbon Nano Fiber/LiFePO{sub 4} composites for Li-ion batteries

    Energy Technology Data Exchange (ETDEWEB)

    Bhuvaneswari, M.S.; Bramnik, N.N.; Ensling, D.; Jaegermann, W. [Darmstadt University of Technology, Institute of Materials Science, Petersenstrasse 23, 64287 Darmstadt (Germany); Ehrenberg, H. [Darmstadt University of Technology, Institute of Materials Science, Petersenstrasse 23, 64287 Darmstadt (Germany); IFW Dresden, Institute for Complex Materials, Helmholtzstr, 20, 01069 Dresden (Germany)

    2008-05-15

    Carbon Nano Fibers (CNFs) coated with LiFePO{sub 4} particles have been prepared by a non-aqueous sol-gel technique. The functionalization of the CNFs by HNO{sub 3} acid treatment has been confirmed by Raman and XPS analyses. The samples pure LiFePO{sub 4} and LiFePO{sub 4}-CNF have been characterized by XRD, SEM, RAMAN, XPS and electrochemical analysis. The LiFePO{sub 4}-CNF sample shows better electrochemical performance compared to as-prepared LiFePO{sub 4}. LiFePO{sub 4}-CNF (10 wt.%) delivers a higher specific capacity ({proportional_to}140 mAh g{sup -1}) than LiFePO{sub 4} with carbon black (25 wt.%) added after synthesis ({proportional_to}120 mAh g{sup -1}) at 0.1C. (author)

  5. Highly efficient photocatalytic degradation of methylene blue by PoPD/TiO2 nanocomposite.

    Science.gov (United States)

    Yang, Chuanxi; Zhang, Ming; Dong, Wenping; Cui, Guanwei; Ren, Zongming; Wang, Weiliang

    2017-01-01

    The poly-o-phenylenediamine (PoPD)/TiO2 nanocomposite was successfully synthesized via 'in situ' oxidative polymerization method. The modified photocatalysts were characterized by BET, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrarad spectra (FT-IR), thermogravimrtic analysis (TGA), X-ray photoelectron spectroscopy (XPS), Ultraviolet-visible diffuse reflectance spectrum (UV-Vis DRS) and Photocurrent Test. The results showed that the PoPD exists on the surface of TiO2, the presence of PoPD does not impact on the lattice structure and grain size of TiO2, and the presence of PoPD enhances the visible response and photoelectric property. The photocatalytic degradation of methylene blue (MB) was chosen as a model reaction to evaluate the photocatalytic activities of TiO2 and PoPD/TiO2. The optimal preparation condition was the molar ratio of oPD to TiO2 = 3:1, HCl concentration = 1.2 mol/L, the molar ratio of APS to oPD = 1:1. The apparent first-order rate constant kapp of PoPD/TiO2 nanocomposite was 0.0098 min-1, which is 6 times higher than TiO2 (0.0016 min-1). Meanwhile, the PoPD/TiO2 nanocomposites showed excellent photocatalytic stability, and the photocatalytic stability was depended on the stability of structure. At last, the photocatalytic mechanism of POPD/TiO2 nanocomposites was also proposed based on the synergetic effect between TiO2 and PoPD.

  6. Levels and transfer of 210Po and 210Pb in Nordic terrestrial ecosystems

    DEFF Research Database (Denmark)

    Brown, J.E.; Gjelsvik, R.; Roos, Per

    2011-01-01

    Recent developments regarding environmental impact assessment methodologies for radioactivity have precipitated the need for information on levels of naturally occurring radionuclides within and transfer to wild flora and fauna. The objectives of this study were therefore to determine activity...... of 210Po in invertebrates and vertebrates. Biokinetic models may provide a tool to explore in a more mechanistic way the behaviour of 210Po in this system....

  7. [A novel red phosphor (La3PO7:Eu3+) prepared by solid state method].

    Science.gov (United States)

    Jin, Ye; Qin, Wei-ping; Zhang, Ji-sen; Wang, Yan; Cao, Chun-yan; Zhang, Ji-shuang; Ren, Xin-guang

    2008-12-01

    Novel red phosphor, Eu3+ -doped oxyphosphate (La3 PO7:Eu3+), was synthesized by a solid state method under high temperature. All the starting materials were analytical grade. La2O3, EuO3 and (NH4)2HPO4 weighed in appropriated molar ratios and ground in an agate mortar. Then the powder was treated under 1000 degrees C. The crystal phase of La3PO7:Eu3+ was investigated by X-ray diffraction (XRD) using a Cu target radiation resource (lamda = 1.54078 ?) and exhibited prominent peaks accordant with JCPDS standard card (33-0720) of La3PO7 in monoclinic phase. Emission and excitation spectra of La3PO7:Eu3+ were recorded at room temperature using a fluorescence spectrometer (Hitachi F-4500). Under 254 nm excitation, intense red fluorescence was observed from La3PO7:Eu3+, which was assigned to the (5)D0-->(7)F2 transition of Eu3+ ions. The intensity of the (5)D0-->(7)F2 transition is stronger than that of the (5)D0-->(7)F1 transition, showing that the Eu3+ ions were in the non-centrosym-metric sites in La3PO7. The CommissionIn-ternational DeL" Eclairage (CIE) coordinate of La3PO7:Eu3+ is (0.63,0.37) in the red area of CIE1931 XY chromaticity coordinate graph and close to that of Y2o3:Eu3+, but the cost of La3PO7 host is lower. This novel material may have potential applications in plasma display panels and Hg-free fluorescent lamps in the future.

  8. LiFePO4/C nanocomposites for lithium-ion batteries

    Science.gov (United States)

    Eftekhari, Ali

    2017-03-01

    LiFePO4, as the most famous member of the family of olivine-type lithium transition metal phosphates, is one of the promising candidates for the cathodes of lithium-ion batteries. However, its battery performance is limited by its low electrical conductivity and slow Li solid-state diffusion. Various methods have been attempted to improve the battery performance of lithium iron phosphate. Among them, compositing the LiFePO4 with carbon nanomaterials seems to be the most promising, as it is facile and efficient. Carbon nanomaterials usually serve as a conductive agent to improve the electrical conductivity while increasing the material porosity in which the solid-state diffusion distances are significantly shortened. Owing to the popularity of various carbonaceous nanomaterials, there is no straightforward line of research for comparing the LiFePO4/C nanocomposites. This review aims to provide a general perspective based on the research achievements reported in the literature. While surveying the research findings reported in the literature, controversial issues are also discussed. The possible contribution of pseudocapacitance as a result of functionalized carbon or LiFePO4 lattice defects is described, since from a practical perspective, a LiFePO4/C electrode can be considered as a supercapacitor at high C rates (with a specific capacitance as large as 200 F g-1). The Li diffusion in LiFePO4 has not been well understood yet; while the Li diffusion within the LiFePO4 lattice seems to be quite fast, the peculiar interfacial electrochemistry of LiFePO4 slows down the diffusion within the entire electrode by a few orders of magnitude.

  9. Improvement of electrochemical activity of LiMnPO4-based cathode by surface iron enrichment

    Science.gov (United States)

    Xu, Xiaoyue; Wang, Tao; Bi, Yujing; Liu, Meng; Yang, Wenchao; Peng, Zhe; Wang, Deyu

    2017-02-01

    LiMnPO4 has attracted massive interests due to its appropriate redox potential and the success of its iron comparative in the lithium ion batteries. The bulk substitution has been widely used to address the poor electrochemical activity of LiMnPO4, which is much lower than that of LiFePO4. In this work, we compare the performance of the core-shell structure and the homogeneous substitution with the same Mn/Fe molar ratio of LiMn0.8Fe0.2PO4. The core-shell phosphate material after carbon coating is composed of a core part of quasi-single LiMnPO4 phase, and a 3-4 nm shell layer of quasi-single LiFePO4-phase, separated by the phase boundary with 1-2 nm thickness. It is interesting to reveal that the core-shell samples exhibit capacities of 156.4, 144.5, 128.2 mAh g-1 under 0.1C, 1C and 5C respectively, which are 5-10% higher than that of the homogenous substituted LiMn0.8Fe0.2PO4 at the corresponding rates, while both of these samples present excellent cyclic stability, still retaining ∼95% of the initial capacities after 1000 cycles under 1C discharging rate. Our results demonstrate that the main reason for LiMnPO4's poor electrochemical activity should be emphasized on the surface polarization, whereas the tardiness on bulk transportation is not as serious as it was presumed.

  10. Transport Properties of xAgI-(1-x)LiPO3 Composite Electrolytes

    Science.gov (United States)

    Singh, D. P.; Shahi, K.; Kar, K. K.

    2011-07-01

    xAgI-(1-x) LiPO3 composite glasses were made by quenching of molten mixture. XRD confirms that γ-AgI is stabilized in LiPO3 glass matrix. A room temperature conductivity of ˜10-3 S/cm is achieved in the composite glass. The ac conductivity follows Jonscher power law (JPL). Higher composition samples also obey time temperature superposition scaling.

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

    Directory of Open Access Journals (Sweden)

    Feng Xu

    2012-05-01

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

  12. Pesquisando em fontes visuais

    OpenAIRE

    Proença, Caio Carvalho; FFCH

    2012-01-01

    O presente ensaio pretende demonstrar reflexões sobre os usos da fotografia como fonte. Na primeira parte do ensaio procura-se demonstrar a experiência de um primeiro contato com a fonte visual, em especial a fotografia, para posteriormente entrar em contato com as diferentes formas metodológicas presente na pesquisa desta fonte. Em um segundo momento mostra-se alguns apontamentos sobre o método de pesquisa voltado à fonte visual fotográfica que auxiliam a pesquisa, contemplando a discussão s...

  13. Meteorologia em linha

    OpenAIRE

    2015-01-01

    DISPOSITIVO TÉCNICO-PEDAGÓGICO: CURSO DE METEOROLOGIA EM LINHA. Designamos por curso o sistema que resulta da relação entre um conjunto de componentes, dando unidade e identidade ao mesmo, incorporados na plataforma Versal: conjunto de 30 lições em vídeo, recursos complementares, valorização e contextualização do curso, orientação e acompanhamento desenhados e previstos, interação com os utilizadores do curso a partir do momento da sua edição aberta em linha. (https://versal.com/c/1fzwaz/m...

  14. A hipnose em triatletas

    OpenAIRE

    Szenészi, Daniela Scharamm

    2005-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Psicologia. Esta pesquisa objetivou investigar em atletas de triatlon a percepção das características da visualização da prova de Ironman e os seus componentes psicofisiológicos durante o transe hipnótico. Foram estudados 7 atletas do sexo masculino em 6 sessões de hipnose. Após cada sessão foi feita uma entrevista semi-estruturada e aplicado um questionário...

  15. Osteoartrites em equinos

    OpenAIRE

    Rocha, Francisco José Martins

    2008-01-01

    Dissertação de Mestrado Integrado em Medicina Veterinária A Osteoartrite (OA) é a principal causa de claudicação no cavalo de desporto e lazer, sendo uma afecção que tem grandes repercussões económicas. Este trabalho descreve algumas das características importantes da estrutura articular, bem como da sua fisiologia. Define a OA e todas as estruturas envolvidas no seu processo. Os mecanismos fisiopatológicos põem em evidência os factores de risco em causa e que determinam tod...

  16. Literatura em quadrinhos

    OpenAIRE

    Ferreira,Tânia Regina

    2015-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2015. O objetivo desta tese é fazer o estudo do desfecho do romance de Lima Barreto, Triste fim de Policarpo Quaresma - (centenário de publicação em livro 1915-2015) - adaptado para as quatro versões homônimas em quadrinhos por: Edgar Vasques e Flávio Braga (Desiderata, 2010); Cesar Lobo e Luiz Antonio Aguiar (Ática, 2010); Lailson de Holanda...

  17. Melhores medicamentos em Pediatria

    OpenAIRE

    2014-01-01

    Resumo: Existem actualmente muitos medicamentos que são utilizados em crianças sem terem sido suficientemente estudados nas diferentes sub-populações pediátricas, com consequências preocupantes. O reconhecimento deste facto levou à criação de regras específicas na investigação de medicamentos pediátricos nos EUA, já em 1997. De igual forma, o Regulamento de Medicamentos para Uso Pediátrico aprovado em De zembro de 2006 pelo Parlamento Europeu, tem como objectivo a resolução deste problema no ...

  18. Variation of {sup 210}Po daily urinary excretion for male subjects at environmental level

    Energy Technology Data Exchange (ETDEWEB)

    Hoelgye, Z.; Hyza, M.; Mihalik, J.; Rulik, P.; Skrkal, J. [National Radiation Protection Institute, Prague (Czech Republic)

    2015-05-15

    {sup 210}Po was determined in 24-h urine of seven healthy males from Prague, Czech Republic, for ten consecutive days. The results show that for each volunteer, the urinary excretion of {sup 210}Po changed only little from day to day in the studied time period. For two volunteers, the difference in the daily excreted {sup 210}Po activity for two consecutive days was not significant, given the 95 % confidence interval (two sigma) of the activity measurements. The same is valid for the excretion data of the other volunteers, except for some days where the differences were slightly higher. The range of daily urinary excretion of {sup 210}Po of each volunteer in the studied time period was quite narrow. Among the volunteers, the maximum daily urinary excretion value of {sup 210}Po was at most about a factor of 2.5 higher than the lowest excretion value. An attempt to explain the observed small inter-individual variability of {sup 210}Po excretion in daily urine is made. (orig.)

  19. Levels and transfer of {sup 210}Po and {sup 210}Pb in Nordic terrestrial ecosystems

    Energy Technology Data Exchange (ETDEWEB)

    Brown, J.E., E-mail: justin.brown@nrpa.n [Norwegian Radiation Protection Authority, PO Box 55, N-1332, Osteras (Norway); Gjelsvik, R. [Norwegian Radiation Protection Authority, PO Box 55, N-1332, Osteras (Norway); Roos, P. [RISO-DTU P.O. Box 49 DK-4000 Roskilde (Denmark); Kalas, J.A. [Norwegian Institute for Nature Research (NINA), Tungasletta 2, 7485 Trondheim (Norway); Outola, I. [STUK, Laippatie 4/P.O. BOX 14, 00881 Helsinki (Finland); Holm, E. [Norwegian Radiation Protection Authority, PO Box 55, N-1332, Osteras (Norway)

    2011-05-15

    Recent developments regarding environmental impact assessment methodologies for radioactivity have precipitated the need for information on levels of naturally occurring radionuclides within and transfer to wild flora and fauna. The objectives of this study were therefore to determine activity concentrations of the main dose forming radionuclides {sup 210}Po and {sup 210}Pb in biota from terrestrial ecosystems thus providing insight into the behaviour of these radioisotopes. Samples of soil, plants and animals were collected at Dovrefjell, Central Norway and Olkiluoto, Finland. Soil profiles from Dovrefjell exhibited an approximately exponential fall in {sup 210}Pb activity concentrations from elevated levels in humus/surface soils to 'supported' levels at depth. Activity concentrations of {sup 210}Po in fauna (invertebrates, mammals, birds) ranged between 2 and 123 Bq kg{sup -1} d.w. and in plants and lichens between 20 and 138 Bq kg{sup -1} d.w. The results showed that soil humus is an important reservoir for {sup 210}Po and {sup 210}Pb and that fauna in close contact with this media may also exhibit elevated levels of {sup 210}Po. Concentration ratios appear to have limited applicability with regards to prediction of activity concentrations of {sup 210}Po in invertebrates and vertebrates. Biokinetic models may provide a tool to explore in a more mechanistic way the behaviour of {sup 210}Po in this system.

  20. Hydrothermal synthesis and luminescence properties of Eu3+and Sm3+codoped BiPO4

    Institute of Scientific and Technical Information of China (English)

    钟剑明; 赵韦人; 蓝立财; 王建青

    2014-01-01

    Eu3+/Sm3+codoped BiPO4 phosphors were synthesized via a facile hydrothermal method with surfactant-free environment. The X-ray diffraction analysis demonstrated that the samples possessed the standard BiPO4 monoclinic structure. Scanning electron microscopy images showed that all samples composed of well-dispersed, micrometer-sized crystals with shuttle-like shape. Energy transfer from Sm3+to Eu3+was confirmed by the luminescence spectra and the decay processes of Sm3+ 4G5/2→6H5/2 emission. Or-ange-red luminescence could be obtained in Eu3+/Sm3+codoped BiPO4 phosphors. The average lifetime of Sm3+ 4G5/2→6H5/2 emis-sion decreased from 2.70 ms in BiPO4:0.03Sm3+ to 2.37 ms in BiPO4:0.03Sm3+,0.05Eu3+. The strong and wide absorption band around 395 nm, originating from both 7F0→5L6 transition of Eu3+and 6H5/2→4K11/2 transition of Sm3+, endowed BiPO4:Eu3+,Sm3+phosphors with the potential application in the fields of near UV-excited white-light-emitting diodes.