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Sample records for chaehs na spontannyj

  1. The NA57 experiment

    CERN Multimedia

    Laurent Guiraud

    1997-01-01

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

  2. Angelite: Paziteli na vhoda

    Directory of Open Access Journals (Sweden)

    Gerov Georgi

    2009-01-01

    Full Text Available (bugarski Statijata prosledjava ikonografskata evoljucija na izobraženijata na arhangelite Mihail i Gavriil, pomesteni pri vhoda na pravoslavnija hram. Povraten moment v neja e 13 vek. Togava arhangel Mihail započva da se izobrazjava kato voin. S tova apotropejnite mu funkcii namirat adekvaten vizualen izraz. K'm kraja na stoletieto arhangel Gavriil započva da se izobrazjava kato pisar - ikonografija, kojato šče b'de dorazvita i utv'rdena prez 14 vek. Prez postvizantijskata epoha v obraza na Mihail se pojavjavat elementi, koito akcentirat v'rhu roljata mu na psihopomp.

  3. A serendipidade na medicina e na anestesiologia

    OpenAIRE

    Vale,Nilton Bezerra do; Delfino,José; Vale,Lúcio Flávio Bezerra do

    2005-01-01

    JUSTIFICATIVA E OBJETIVOS: Neste trabalho foram examinados mais de uma centena dos mais felizes acoplamentos de uma mente brilhante com a sorte benfazeja (serendipidade), através da releitura das mais relevantes histórias sobre invenções e descobertas relacionadas à ciência (n = 46), à Medicina (n = 46) e à Anestesiologia (n = 16). CONTEÚDO: Conceito de serendipidade; exemplos célebres de serendipidade em Ciência e Tecnologia; serendipidade na pesquisa e prática médicas; serendipidade na Anes...

  4. At NA2

    CERN Multimedia

    1977-01-01

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

  5. ETAŽNA LASTNINA S POUDARKOM NA ZVEtL

    OpenAIRE

    Cvetko, Tadej

    2014-01-01

    Etažna lastnina je lastnina posameznega dela zgradbe in solastnina na skupnih delih, ki služijo vsem ali nekaterim posameznim delom zgradbe. Etažna lastnino na območju Republike Slovenije je uvedel Zakon o lastnini na delih stavbe kot odgovor na potrebo po hitri nacionalizaciji stanovanj in odrazu doslednega uvajanja osnovne ideje takratnega socialističnega duha t.j. družbene lastnine. Slovenija kot mlada demokratična država je ob tranziciji iz socialističnega v demokratični sistem poskušala ...

  6. The NA48 experiment

    CERN Multimedia

    1995-01-01

    The NA48 experiment is designed to study the Charge-Parity (CP) violation. CP violation is observed in certain very rare decays. Its study is important in understanding Nature's preference of matter over antimatter, which resulted in asymmetry soon after the Big Bang, creating a matter-dominated Universe.

  7. Riso na epilepsia

    Directory of Open Access Journals (Sweden)

    Edymar Jardim

    1967-06-01

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

  8. Biotecnologia na agricultura

    Directory of Open Access Journals (Sweden)

    Helaine Carrer

    2010-01-01

    Full Text Available A expectativa de o crescimento populacional atingir 9 bilhões de habitantes em 2050 em adição às questões da sustentabilidade e do aquecimento global nos desafiam a aumentar a oferta de alimentos. Uma metodologia alternativa que contribua para a redução do impacto desse cenário envolve a biotecnologia, que, nas últimas décadas, trouxe marcantes oportunidades tecnológicas na agricultura, resultando em relevante desenvolvimento na obtenção de novas variedades de plantas, na melhoria da qualidade de diversos alimentos e atualmente também na bioenergia. As técnicas biotecnológicas envolvendo os marcadores moleculares, a genômica e a transformação genética estão transformando a agricultura e são discutidas neste artigo.The expected population growth to reach 9 billion by 2050 in addition to issues of sustainability and global warming challenges us to increase the supply of food. An alternative approach to help reducing the impact of this scenario involves biotechnology which in recent decades has brought remarkable technological opportunities in the agriculture that resulted in relevant development in obtaining new plant varieties, improved quality of different foods, and now also in bioenergy. The biotechnology techniques involving molecular markers, genomics and genetic transformation are transforming agriculture and will be discussed in this article.

  9. Preparing for NA4

    CERN Multimedia

    1977-01-01

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

  10. A epilepsia na neurocisticercose

    Directory of Open Access Journals (Sweden)

    Luís Marques-Assis

    1972-12-01

    Full Text Available Foram estudados 131 casos de epilepsia com etiologia cisticercótica comprovada. A idade variou de 2 a 68 anos; 75 pacientes eram de sexo masculino e 56 de sexo feminino; 117 eram brancos, 10 pardos, três pretos e um amarelo. A idade de início da doença predominou na primeira década. O estudo foi feito em relação ao tipo de epilepsia, ao tempo decorrido após a primeira crise, à freqüência das crises e ao eletrencefalograma relativamente às epilepsias em geral. Investigação foi feita também em relação à cefaléia, aos achados neurológicos, liquóricos, radiológicos simples e contrastados e anátomo-patológicos. A análise dos resultados permitiu aos autores as seguintes conclusões: 1 No grupo de neurocisticercose o início da doença predominou na primeira e a partir da quarta década em relação às epilepsias em geral. 2 Dentre as manifestações clínicas predominaram as formas convulsivas da doença (61%, sendo as crises bravas-jacksonianas as menos freqüentes (4%; quando comparadas com as epilepsias em geral, verifica-se incidência menor das convulsões generalizadas na neurocisticercose. 3 Quanto ao tempo de doença, verifica-se predomínio das formas de duração mais curta (um ano ou menos na neurocisticercose. 4 A severidade da epilepsia, traduzida pela freqüência das crises, foi menor no grupo com neurocisticercose. 5 Excluídos os casos com anormalidades eletrencefalográficas contínuas, foram encontrados maiores índices percentuais de EEG normal na neurocisticercose que nas epilepsias em geral. 6 A cefaléia estava presente em 68% dos casos, assumindo caráter paroxístico na maior parte (78%; em 67% dos casos com cefaléia paroxística não havia concomitantemente sinais de hipertensão intracraniana; nos casos com cefaléia contínua, em apenas dois (13% esses sinais não estavam presentes. 7 Na maior parte dos casos (62% as manifestações epilépticas se apresentaram isoladamente, sem sinais neurol

  11. Report from NA49

    CERN Document Server

    Gazdzicki, M; Anticic, T; Baatar, B; Barna, D; Bartke, Jerzy; Betev, L; Bialkowska, H; Billmeier, A; Blume, C; Boimska, B; Botje, M; Bracinik, J; Bramm, R; Brun, R; Buncic, P; Cerny, V; Christakoglou, P; Chvala, O; Cramer, J G; Csató, P; Darmenov, N; Dimitrov, A; Dinkelaker, P; Eckardt, V; Farantatos, G; Filip, P; Flierl, D; Fodor, Z; Foka, P Y; Freund, P; Friese, V; Gál, J; Georgopoulos, G; Gladysz-Dziadus, E; Grebieszkow, K; Hegyi, S; Höhne, C; Kadija, K; Karev, A; Kliemant, M; Kniege9, S; Kolesnikov, V I; Kollegger, T; Kornas, E; Korus, R; Kowalski, M; Kraus, I; Kreps, M; Van Leeuwen, M; Lévai, Peter; Litov, L; Lungwitz, B; Makariev, M; Malakhov, A I; Markert, C; Mateev, M; Mayes, B W; Melkumov, G L; Meurer, C; Mischke, A; Mitrovski, M; Molnár, J; Mrówczynski, S; Pálla, G; Panagiotou, A D; Panayotov, D; Petridis, A; Pikna, M; Pinsky, L; Pühlhofer, F; Reid, J G; Renfordt, R E; Richard, A; Roland, C; Roland, G; Rybczynski, M; Rybicki, A; Sandoval, A; Sann, H; Schmitz, N; Seyboth, P; Siklér, F; Sitár, B; Skrzypczak, E; Stefanek, G; Stock, R; Ströbele, H; Susa, T; Szentpétery, I; Sziklai, J; Trainor, T A; Varga, D; Vassiliou, Maria; Veres, G I; Vesztergombi, G; Vranic, D; Wetzler, A; Wlodarczyk, Z; Yoo, I K; Zaranek, J; Zimányi, J

    2004-01-01

    The most recent data of NA49 on hadron production in nuclear collisions at CERN SPS energies are presented. Anomalies in the energy dependence of pion and kaon production in central Pb+Pb collisions are observed. They suggest that the onset of deconfinement is located at about 30 AGeV. Large multiplicity and transverse momentum fluctuations are measured for collisions of intermediate mass systems at 158 AGeV. The need for a new experimental programme at the CERN SPS is underlined.

  12. A escola na internet

    OpenAIRE

    Albino, Ayrán Lavra

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção. O presente trabalho pretendeu analisar o uso do suporte tecnológico do ensino a distância (computador e internet) como elemento complementar do ensino presencial. Procurou-se demonstrar, na fundamentação teórica, que as tendências pedagógicas contemporâneas e as características da tecnologia digital viabilizam esta possibilidade. Operacionalizou-se essa ...

  13. Fractais na arquitectura

    OpenAIRE

    2009-01-01

    Uma forma de inovar na simplicidade, em Arquitectura, é usar a geometria dos fractais. Uma técnica simples de iterativamente chegar a formas fantásticas e muito agradáveis de integrar no desenho de uma obra de arte: sejam edifícios, pontes, jardins, e outros. Vamos abordar o conceito essencial da geometria dos fractais e analisar exemplos da sua aplicação em edifícios e cidades. Para isso faz-se uma introdução ao tema pelos primórdios da geometria fractal referindo exemplos como o Co...

  14. na Perua

    Directory of Open Access Journals (Sweden)

    Jorge Carvalho

    1989-01-01

    Full Text Available Antes de se caracterizar como tentativa de ensaio ou de análise a qualquer coisa, o presente artigo tem, antes de mais nada, a pretensão de se constituir uma provocação ao debate acerca da questão do esporte na escola. A provocação parte basicamente do relato da minha experiência pessoal como Secretário da Educação do Município de Aracaju, cargo que exerci no período de 1º de janeiro de 1986 a 27 de janeiro de 1987.

  15. Comprometimento pulmonar na leptospirose

    Directory of Open Access Journals (Sweden)

    Jorge Eduardo Manhães de Carvalho

    1992-03-01

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

  16. Laser na medicina: avanços na Oftalmologia

    OpenAIRE

    João Alberto Holanda de Freitas

    2007-01-01

    Entre os grandes avanços tecnológicos dos últimos anos, o laser sem dúvida ocupa lugar de destaque. Desde a construção do primeiro aparelho a laser em 1959, novas aplicações surgem continuadamente. O laser está presente de maneira marcante na pesquisa básica, na indústria e na medicina.

  17. Na Cauda do Cometa

    Science.gov (United States)

    Voelzke, M. R.

    2009-01-01

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

  18. Raytracing na GPU

    OpenAIRE

    Straňák, Marek

    2011-01-01

    Raytracing je základnou technikou pro vizualizaci trojrozměrných objektů. Cílem práce je demonstrovat možnost implementace sledovaní paprsků pomocí grafického akcelerátoru.  Popíšem základní algoritmus a jeho modifikovanou verzi, která byla implementována pomocí jazyka CUDA C. Výsledný raytracer je optimalizovaný pro dynamické scény. Pro tento účel byla použita akcelerační struktura KD strom, hierarchické obalové tělesa a přenos dat pomocí PBO. Pro realističtější výstupy byla také implementov...

  19. Leadeship: na effective relationship

    OpenAIRE

    Sergio Roberto Guimarães Pantoja

    2005-01-01

    Resumo: O presente trabalho tem por objetivo analisar a eficácia da liderança em três instituições de ensino superior em São Luís -MA, sendo a instituição A (particular), a B (pública federal) e a C (pública estadual). Adotou-se os estilos de liderança: democrático, autocrático e liberal, baseando-se na Teoria dos Estilos de Kurt Lewin e seus colaboradores e nas qualidades de liderança (objetividade, compreensão dos outros, flexibilidade, comunicação e autoridade), definidas por Uris A.(196...

  20. NA48 prototype calorimeter

    CERN Document Server

    1990-01-01

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

  1. O real na psicose

    Directory of Open Access Journals (Sweden)

    Maurício Castejón Herrmann

    2004-06-01

    Full Text Available Este artigo discute a noção de real na psicose, a partir das formulações de Lacan sobre o tema, presentes no Seminário 3 - As Psicoses, no Seminário 20 - Mais, Ainda e no texto Televisão. Considerando-se que a concepção de real tem uma indicação clínica, a hipótese que se formula é a de que a noção de real trabalhada no Seminário 20, Mais, Ainda representa uma continuidade da concepção de real desenvolvida no Seminário 3, As Psicoses

  2. Comprometimento pulmonar na leptospirose

    Directory of Open Access Journals (Sweden)

    Jorge Eduardo Manhães de Carvalho

    1992-03-01

    Full Text Available Em 23 pacientes com leptospirose apresentando comprometimento pulmonar, internados no Hospital Universitário Antônio Pedro da XJFF, Niterói, hemoptise e hemoptóicos foram observados em 21,7% e 30,4%, respectivajnente. Gasometria arterial revelou hipoxemia e hipocapnia na maioria dos casos. Radiografia de tórax em 15 pacientes mostrou comprometimento alveolar em 60%, comprometimento intersticial-reticular em 6%, padrão misto (alveolar e intersticial em20%e ausência de alterações radiológicas em 14%. A necrópsiade 13 pacientes mostrou edema, congestão e hemorragia nos pulmões em 100% dos casos. A hemorragia foi focal em 46% e difusa em 54% dos casos. Houve formação de membrana hialina em 30% e trombos de fibrina em 46% dos pulmões estudados, o que estabelece o diagnóstico da coagulação intravascular disseminada e a ocorrência da síndrome de angústia respiratória na leptospirose.Tostudy thepulmonary complications in leptospirosis case records of 23 such patients admitted at the Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Brasil, were reviewed. Hemoptysis were seen in 21.7% and sputal blood in 30.4% of patients. Arterial gasometry detected hypoxemia and hypocapnia in most cases. Thoracic radiology showed an alveolar pattern in 60% of the patients, alveolo-interstitial in 20%, interstitial in 6%, and in 14% the lungs were considered to be normal Necropsy of 13 cases showed edema, congestion and hemorrhage in the lungs in all cases. Hyaline membrane was found in 30% and fibrin thrombi in 46% of these cases, resulting in a diagnosis of adult respiratory distress syndrome and acute disseminated intravascular coagulation (consumption coagulopathy in leptospirosis.

  3. A ENGENHARIA NA ESCOLA

    Directory of Open Access Journals (Sweden)

    Valéria Pelizzer Casara

    2015-04-01

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

  4. Valores na escola

    Directory of Open Access Journals (Sweden)

    Menin Maria Suzana De Stefano

    2002-01-01

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

  5. A aposta na filosofia

    Directory of Open Access Journals (Sweden)

    Márcio Suzuki

    2011-12-01

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

  6. O SUBLIME NA MODERNIDADE

    Directory of Open Access Journals (Sweden)

    Martha de Almeida

    2009-03-01

    Full Text Available A obra Uma investigação filosófica sobre a origem de nossas idéias do sublime e dobelo, do sensualista inglês Edmund Burke (1757, data as origens do sublime na Modernidade. Nosublime ocorre é um prazer ligado à dor, um "horror delicioso" que sentimos quando acreditamosque estamos em perigo sem que isso esteja ocorrendo realmente. Em O mundo como Vontade erepresentação Schopenhauer assume as influências que sofreu de Kant no que diz respeito à suainterpretação sobre o belo e o sublime, porém difere dele quanto à natureza dessa impressão. ParaSchopenhauer a experiência estética pressupõe a dissolução da subjetividade num movimento decontemplação das idéias livre do querer imposto pela vontade individual. As idéias deSchopenhauer influenciaram a estética do Nietzsche de O nascimento da tragédia.

  7. A CORPOREIDADE NA ESCOLA

    Directory of Open Access Journals (Sweden)

    Márcio Xavier Bonorino Figueiredo

    2008-07-01

    Full Text Available Com este estudo, visa-se a investigar como a escola tem construído um corporeidade para a submissão dos estudantes ao sistema de dominação vigente. Propõe-se, também, a descobrir a corporeidade expressa nas brincadeiras, jogos e desenhos das crianças. Realizaram-se observações do espaço escolar de uma sala de aula durante um ano letivo, bem como duas entrevistas com cada uma das crianças de uma turma de 1ª série do 1º grau, em uma escola pública de periferia. Constatou-se que a escola, através de uma série de normas, explícitas ou implícitas, vai construindo uma corporeidade baseada no individualismo, na massificação e nos privilégios de uma minoria. A análise das brincadeiras, jogos e desenhos infantis revelou que estes veiculam valores contrários àqueles impostos pela escola. Em vista disso, elaborou-se uma proposta incipiente de trabalho corporal que tenha nas brincadeiras, jogos e desenhos das crianças o seu ponto de partida para uma práxis transformadora.

  8. Ulogata na endoetelin-1 vo razvojot na dijabeticna nefropatija inducirana so streptozocin

    Directory of Open Access Journals (Sweden)

    Jasmina Trojacanec

    2006-06-01

    Full Text Available Dijabeticnata nefropatija pretstavuva edna od hronicnite mikrovaskularni komplikacii na dijabetot, so multifaktorijalna i ne do kraj rasvetlena etiopatogeneza. So ogled na toa sto kaj pacientite so dijabet, osobeno kaj onie so dijabeticna nefropatija, se najdeni zgolemeni vrednosti na endotelin-1, se pretpostavuva deka istiot moze da ima znacajna uloga vo razvojot na dijabeticnata nefropatija. Osnovna cel na nasata studija bese da se detektiraat promenite vo plazmatskoto nivo na endotelin-1 po eksperimentalno induciran dijabet, i dijabeticna nefropatija kaj staorci so streptozocin. So ogled na dobro poznatite efekti na AKE-inhibitorite, vo ovaa studija go ispituvavme i vlijanieto na enalapril (AKE inhibitor na plazmatskite koncentracii na endotelin-1, kako i negovite efekti vo tretmanot na dijabeti~na nefropatija. Ednokratnata i.p. administracija na streptozocin (STZ predizvika signifikantno zgolemuvanje na plazmatskite koncentracii na endotelin-1, proprateni so jasno izrazeni simptomi i znaci na dijabeticna nefropatija (mikroalbuminurija, zgolemeni urinarni vrednosti na N-acetyl-fl-D-glucosamidase, zgolemeni serumski koncentracii na urea, poliurija. Cetiri nedelniot tretman so enalapril dovede do signifikantno namaluvanje na plazmatskite koncentracii na endotelin-1 i do podobruvanje na simtomite i znacite na dijabeticnata nefropatija. Dobienite rezultati potvrduvaat deka endotelin-1 moze da ima znacajna uloga vo razvojot i progresijata na dijabeticnata nefropatija, a AKE inhibitorite, odnosno enalapril, mozat da ja ublazat i usporat progresijata na dijabeticnata nefropatija

  9. SPOLNO NADLEGOVANJE NA DELOVNEM MESTU

    OpenAIRE

    Rubič, Gašper

    2016-01-01

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

  10. Dificuldades da aprendizagem na leitura

    OpenAIRE

    Nascimento, Solange Oliveira; Trugillo, Edneuza Alves

    2011-01-01

    Este presente artigo propôs verificar os fatores que influenciam no desenvolvimento da aprendizagem na leitura dos alunos da 4º ano no Ensino Fundamental na Escola Municipal Armando Dias no município de Sinop/MT, cujo tema é dificuldade da aprendizagem na leitura. O objetivo do trabalho foi investigar as relações interpessoais em sala de aula e de que forma a professora introduz a leitura nos conteúdos dados aos alunos. Como fundamentação teórica, recorremos a vários autores, entre eles: Enri...

  11. Studies on NaXe Clusters

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The chemical shift of 23Na in excimer NaXe was measured by using nuclear magnetic resonance (NMR) spectra, which is in good agreement with the theoretical value obtained by ab initio calculations. The bond length, dissociation energy, dipole of NaXe and Mulliken charges at Na and Xe in NaXe were calculated, respectively. The spectra of ultraviolet (UV) fluorescence and surface-enhanced Raman scattering of NaXe were also measured.

  12. Na via do Behemoth

    Directory of Open Access Journals (Sweden)

    Gérard Rabinovitch

    2008-06-01

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

  13. Results from NA61/SHINE

    Directory of Open Access Journals (Sweden)

    Unger M.

    2013-06-01

    Full Text Available In this paper we summarize recent results from NA61/SHINE relevant for heavy ion physics, neutrino oscillations and the interpretation of air showers induced by ultra-high energy cosmic rays.

  14. Risbjerg: Historisk stemmeskred med NA

    DEFF Research Database (Denmark)

    Thomsen, Søren Risbjerg

    2007-01-01

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

  15. Dificuldades da aprendizagem na leitura

    Directory of Open Access Journals (Sweden)

    Solange Oliveira Nascimento

    2011-07-01

    Full Text Available Este presente artigo propôs verificar os fatores que influenciam no desenvolvimento da aprendizagem na leitura dos alunos da 4º ano no Ensino Fundamental na Escola Municipal Armando Dias no município de Sinop/MT, cujo tema é dificuldade da aprendizagem na leitura. O objetivo do trabalho foi investigar as relações interpessoais em sala de aula e de que forma a professora introduz a leitura nos conteúdos dados aos alunos. Como fundamentação teórica, recorremos a vários autores, entre eles: Enrique Cártula Fita, Elisabete da Assunção Jóse, Jésus Alonso Tapia, Maria Tereza Coelho e Ruth Caribe da Rocha Drouet. A metodologia usada consistiu na pesquisa qualitativa, no estudo de caso e questionário com perguntas abertas e fechadas aplicadas à professora e três alunos que estão com dificuldades na leitura. Através dos relatos dos sujeitos realizamos um estudo analítico confrontando os dados da pesquisa com os autores principais que fundamentam a mesma. O presente trabalho pretende contribuir e mostrar ao professor em sala de aula a importância de incentivar os alunos a aprenderem a ler com prazer motivando-os a despertar o interesse e gosto pela leitura. Os resultados da investigação revelam que a professora pesquisada está ciente de seu papel e procura meios para enfrentar os problemas existentes em sala de aula, em especial às dificuldades da aprendizagem na leitura e os alunos percebem a importância da leitura e tem vontade em avançar nesse aprendizado.Palavras-chave: educação; dificuldades na aprendizagem. professor; aluno; sala de aula.

  16. Na Deposition on MnO(100)

    Science.gov (United States)

    Feng, Xu; Cox, David F.

    2016-03-01

    Na deposition on the MnO(100) surface was investigated by temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED). Na TPD and XPS results indicate that adsorbed Na interacts strongly with the MnO substrate to form an irreversibly-adsorbed, oxidic Na compound on the surface for coverages up to 1 monolayer (ML). This strongly-bound Na diffuses into the MnO subsurface and bulk at elevated temperatures above 500 K. For Na coverages above 1 ML, metallic Na is present and desorbs from the surface below 500 K. The deposition of Na on MnO(100) follows a Stranski-Krastanov (SK) growth mode, with the formation of metallic Na islands following completion of the first Na monolayer. After Na deposition, the surface exhibits a diffuse (1 × 1) LEED pattern, suggesting the formation of disordered Na overlayers. After heating to 1000 K, the surface presents a (2 × 2) LEED pattern indicating that a surface reconstruction is induced by the diffusion of Na into the near surface region. CO2 can be used as a probe molecule in TPD to distinguish between metallic Na islands and oxidic Na in the first ML, and to indicate when Na that is still observable by XPS goes subsurface.

  17. Jezična analiza lista Naš glas

    OpenAIRE

    2015-01-01

    U radu se analizira jezik Našega glasa (list „Riviere“ – radne organizacije za ugostiteljstvo, turizam, trgovinu i proizvodnju) koji je izlazio u Poreču od 1969. do 1982. godine. Nakon kratkoga osvrta na strukturu, sadržaj i ulogu toga lista te njegov značaj za stanovništvo lokalne zajednice, slijedi prikaz jezičnih zbivanja u vrijeme njegova izlaženja. U žarištu su istraživanja pravopisne, morfološke, sintaktičke, tvorbene, leksičke i stilske karakteristike lista. Rezultati istraživanja poka...

  18. Corpo e sexualidade na gravidez

    Directory of Open Access Journals (Sweden)

    Natalúcia Matos Araújo

    2012-06-01

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

  19. All new for NA62

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

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

  20. Alcool e drogas na esquizofrenia

    OpenAIRE

    Marilia Montoya Boscolo

    2000-01-01

    Resumo: O objetivo deste trabalho é estudar o fenômeno do uso de álcool e drogas ilícitas (maconha e cocaína) na esquizoftenia. Trata-se de estudo comparativo, casocontrole, de dois grupos de esquizoftênicos pareados para sexo e idade, que preencheram os critérios diagnósticos do DSMIV para esquizoftenia. O grupo caso é definido por esquizofrênicos que têm história de ter feito uso de álcool, pelo menos no último mês e/ ou história de ter feito uso de drogas (maconha e cocaína), pelo menos al...

  1. Criatividade na Gestalt–terapia

    Directory of Open Access Journals (Sweden)

    Patrícia Albuquerque Lima

    2009-04-01

    Full Text Available Como se conceitua criatividade na teoria da Gestalt–terapia? Qual o papel e a função da criatividade nesta abordagem? O que se considera como um comportamento criativo no senso comum é tão diferente do que compreendemos, na abordagem gestáltica, como criatividade? Estas são algumas das perguntas sobre as quais buscaremos transcorrer ao longo deste artigo. Partimos de simples perguntas, pois talvez um bom recurso para se “tratar” da criatividade seja a curiosidade. Para isto, iremos apresentar a contribuição de alguns autores que discorreram sobre o tema da criatividade em suas obras, iniciando por Kurt Goldstein e sua Teoria Organísmica, que consideramos o principal substrato teórico para se pensar a criatividade na Gestalt–terapia.

  2. gigapanorama of NA 62 cavern

    CERN Multimedia

    Brice, Maximilien

    2015-01-01

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

  3. Criatividade na Gestalt–terapia

    OpenAIRE

    Patrícia Albuquerque Lima

    2009-01-01

    Como se conceitua criatividade na teoria da Gestalt–terapia? Qual o papel e a função da criatividade nesta abordagem? O que se considera como um comportamento criativo no senso comum é tão diferente do que compreendemos, na abordagem gestáltica, como criatividade? Estas são algumas das perguntas sobre as quais buscaremos transcorrer ao longo deste artigo. Partimos de simples perguntas, pois talvez um bom recurso para se “tratar” da criatividade seja a curiosidade. Para isto, iremos apresentar...

  4. Determination of the (Na+) Sternheimer antishielding factor by 23Na NMR spectroscopy on sodium oxide chloride, Na3OCl.

    Science.gov (United States)

    Klösters, G; Jansen, M

    2000-07-01

    The (Na+) Sternheimer antishielding factor gammainifinity (Na+) was determined by 23Na NMR spectroscopy on sodium oxide-chloride, Na3OCl. The quadrupolar coupling constant of the sodium ion in Na3OCI was determined to QCC = 11.34 MHz, which presents the largest coupling constant of a sodium nucleus observed so far. Applying a simple point charge model, the largest principal value of the electric field gradient at the sodium site was calculated to V(zz) = -6.76762 x 10(20) V/m2. From these values we calculated the (Na+) Sternheimer antishielding factor to gammainifinity (Na+)= -5.36. In sodium oxide, Na2O, we observed an isotropic chemical shift of deltaCS = 55.1 ppm, referenced to 1 M aqueous NaCI (delta = 0 ppm).

  5. Li Na Aces French Open

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Chinese tennis player becomes the first Asian to win a Grand Slam singles title Chinese tennis player Li Na beat defending champion Francesca Schiavone from Italy,6-4,7-6,on the clay court at Roland Garros,winning the 2011 French Open Tennis Tournament on June 4.She made history by becoming the first Chinese to win a grand slam singles title.

  6. NA62: Hidden Sector Physics

    CERN Document Server

    Cesarotti, Carissa Joyce

    2016-01-01

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

  7. NA60 frees the quarks

    CERN Multimedia

    2003-01-01

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

  8. Astrocytes generate Na+-mediated metabolic waves.

    Science.gov (United States)

    Bernardinelli, Yann; Magistretti, Pierre J; Chatton, Jean-Yves

    2004-10-12

    Glutamate-evoked Na+ increase in astrocytes has been identified as a signal coupling synaptic activity to glucose consumption. Astrocytes participate in multicellular signaling by transmitting intercellular Ca2+ waves. Here we show that intercellular Na+ waves are also evoked by activation of single cultured cortical mouse astrocytes in parallel with Ca2+ waves; however, there are spatial and temporal differences. Indeed, maneuvers that inhibit Ca2+ waves also inhibit Na+ waves; however, inhibition of the Na+/glutamate cotransporters or enzymatic degradation of extracellular glutamate selectively inhibit the Na+ wave. Thus, glutamate released by a Ca2+ wave-dependent mechanism is taken up by the Na+/glutamate cotransporters, resulting in a regenerative propagation of cytosolic Na+ increases. The Na+ wave gives rise to a spatially correlated increase in glucose uptake, which is prevented by glutamate transporter inhibition. Therefore, astrocytes appear to function as a network for concerted neurometabolic coupling through the generation of intercellular Na+ and metabolic waves.

  9. Europlanet NA2 Science Networking

    Science.gov (United States)

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

    2013-04-01

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

  10. Verdade na Cena, Verdade na Vida: Boal e Stanislavski

    Directory of Open Access Journals (Sweden)

    Antonia

    2015-04-01

    Full Text Available À luz do conceito de verdade cênica, o presente artigo discute a influência do método Stanislavski nos primeiros experimentos no seio do Teatro Arena de São Paulo e também aponta rastros do mestre russo nos princípios da Poética do Oprimido de Augusto Boal. O objetivo primordial consiste em incentivar a construção de espetáculos-fórum, partindo de um trabalho com rigor físico e detalhamento psicológico stanislavskianos. Trabalho este, que pode ser desenvolvido na lógica interna do processo, na fase que precede a todo produto de criação, antes da intervenção do espectador e no âmbito de montagens profissionais de teatro-fórum, em projetos mais duradouros.

  11. NA

    OpenAIRE

    1994-01-01

    Significant research in high performance analog-to-digital converters (ADCs) has been directed at retaining part of the high-speed flash ADC architecture, while reducing the total number of comparators in the circuit. The symmetrical number system (SNS) can be used to preprocess the analog input signal, reducing the number of comparators and thus reducing the chip area and power consumption of the ADC. This thesis examines a Very Large Scale Integrated (VLSI) design for a folding circuit for ...

  12. Hrvatska milja na starim kartama

    Directory of Open Access Journals (Sweden)

    Marina Viličić

    2016-06-01

    Full Text Available Karta Stjepana Glavača iz 1673. godine vrijedan je i jedinstven primjerak hrvatske kartografske baštine. Na njoj je ucrtana hrvatska milja kojoj nema traga na kartama izrađenima prije Glavačeve karte. Više autora spominje vrijednost duljine hrvatske milje, ali nisu suglasni s iznosom njezine vrijednosti. Za potrebe ovoga rada, pored kopije Glavačeve karte pribavljene su i istražene kopije karata Janeza Vajkarda Valvasora iz 1689., Giacoma Cantellija da Vignole iz 1690., Antuna Belavića iz 1739. i karta Kraljevinâ Dalmacije, Hrvatske i Slavonije… iz 1746. na kojima je, pored ostalih milja, ucrtana i hrvatska milja. S pomoću tih ucrtanih milja izračunan je odnos između hrvatske i njemačke milje, zatim talijanske i hrvatske milje te potom francuske i hrvatske milje. Pored tih odnosa, dan je i pregled odnosa hrvatske milje i nekih drugih milja. Utvrđeno je da je duljina hrvatske milje jednaka 1/10 duljine ekvatorskog stupnja. Duljina hrvatske milje za Zemljin radijus R = 6371 km iznosi 11 120 m, odnosno približno 11 km.

  13. Corpo e velhice na contemporaneidade

    Directory of Open Access Journals (Sweden)

    Gabriela Felten da Maia

    2014-04-01

    Full Text Available A inegável atenção dada ao corpo na sociedade inspirou a construção deste trabalho, visto que os imperativos atuais são a beleza, a forma e o vigor. A velhice e a inexorabilidade da morte apresentam-se para este ideal como incômodos que devem ser afastados através de diversos hábitos "saudáveis" e “rejuvenescedores”, como a ginástica, os cosméticos, as vitaminas, procedimentos estético-cirúrgicos, entre outros. O modo de “ser velho”, então, passa a ser configurado não mais por estereótipos negativos, mas a partir de um ethos em que os idosos são apresentados como saudáveis, joviais, engajados, produtivos e autoconfiantes. São corpos que ultrapassam as marcas do tempo, atléticos, firmes e lisos. Logo, aqueles que não aderem a este ethos podem tornar-se desviantes, estranhos, velhos, ultrapassados e precisam, portanto, serem descartados ou escamoteados. Tendo em vista estas questões, o presente trabalho propõe-se a discutir sobre o tema velhice, corpo e sociedade, na tentativa de problematizar sobre os atuais modos de subjetivação e o envelhecimento na contemporaneidade.

  14. Homocisteína Homocysteine

    Directory of Open Access Journals (Sweden)

    Lindalva Batista Neves

    2004-10-01

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

  15. Utjecaj načina zrenja na udjel vode u bezmasnoj tvari i na udjel masti u siru Trapistu

    OpenAIRE

    Kirin, Slavko

    2001-01-01

    U radu je istraživan utjecaj načina zrenja na udjel vode u bezmasnoj tvari i na udjel masti u siru Trapistu. U sadašnjoj proizvodnji (Lura, Tvornica Bjelovar), sir Trapist zrije na prirodan način s oblikovanjem kore, te vakuumski upakiran u termoskupljajuče plastične vrećice, čime se dobije sir bez kore. Utvrđeno je da spomenuti načini zrenja uvjetuju signifikantne razlike u udjelu vode u bezmasnoj tvari sira. On je 5,34 % viši kod sira Trapista u vrećici u odnosu na sir Trapist s korom. Udje...

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

    DEFF Research Database (Denmark)

    Kristensen, Michael; Juel, Carsten

    2010-01-01

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

  17. A Perspectiva de estudos sobre os sujeitos na Arquivologia, na Biblioteconomia e na Museologia

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Ávila Araújo

    2015-01-01

    Full Text Available Arquivologia, Biblioteconomia e Museologia se constituíram, como disciplinas científicas, no final do século XIX, a partir da consolidação de um modelo custodial patrimonialista e, depois, com sua superação a partir de duas perspectivas: uma funcionalista e outra crítica. Posteriormente, uma outra tradição de pesquisa se desenvolveu: estudos realizados a partir do ponto de vista dos sujeitos (usuários, públicos que se relacionam com as instituições arquivo, biblioteca, museu, e que experimentam seus espaços e se apropriam dos conteúdos de seus acervos. O objetivo deste texto é analisar o desenvolvimento desta perspectiva na Arquivologia, na Biblioteconomia e na Museologia, bem como defender a importância de um diálogo maior entre os achados de pesquisa realizados neste âmbito em cada uma das três áreas analisadas.

  18. NaCl Potentiates Human Fibrocyte Differentiation

    OpenAIRE

    Nehemiah Cox; Darrell Pilling; Gomer, Richard H.

    2012-01-01

    Excessive NaCl intake is associated with a variety of fibrosing diseases such as renal and cardiac fibrosis. This association has been attributed to increased blood pressure as the result of high NaCl intake. However, studies in patients with high NaCl intake and fibrosis reveal a connection between NaCl intake and fibrosis that is independent of blood pressure. We find that increasing the extracellular concentration of NaCl to levels that may occur in human blood after high-salt intake can p...

  19. Conversion and Distribution of Lead and Tin in NaOH-NaNO3 Fusion Process

    Science.gov (United States)

    Liu, Jingxin; Guo, Xueyi

    2017-04-01

    Oxidizing alkali fusion process has been studied to extract amphoteric metals. Transformation and distribution behaviors of typical amphoteric metals Pb and Sn in the NaOH-NaNO3 fusion process are systemically studied by theoretical analysis and experimental verification done in this work. Functions of NaOH and NaNO3 in the fusion process were also investigated. The results show the fused products, Na2PbO3 and Na2SnO3, are captured in the flux, and Na2PbO4 is speculated to reduce to Pb(II) in the following leaching process. By measuring solubility data of NaOH-Na2SnO3-PbO-H2O system, a strategy of crystallization is proposed to separate Sn with Pb in concentrated alkaline solution, and slice Na2Sn(OH)6 is obtained as a product.

  20. The hydrogen storage properties of Na decorated small boron cluster B6Na8

    Science.gov (United States)

    Tang, Chunmei; Wang, Zhiguo; Zhang, Xue; Wen, Ninghua

    2016-09-01

    The binding energy of the Na atoms to the hollow sites of the B6 cage is larger than the experimental cohesive energy of bulk Na, so the clustering of Na atoms can be avoided. The polarization interaction dominates the adsorption of H2 by the B6Na8 cluster. The Na-coated B6Na8sbnd B8sbnd B6Na8 complex with the dispersive Na atoms and four H2 molecules adsorbed per Na can serve as better building blocks of polymers than the (B6Na8)2 dimer. These findings suggest a new route to design cluster-assembled hydrogen storage materials based on sp2-terminated boron chains.

  1. Silicene for Na-ion battery applications

    Science.gov (United States)

    Zhu, Jiajie; Schwingenschlögl, Udo

    2016-09-01

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

  2. Silicene for Na-ion battery applications

    KAUST Repository

    Zhu, Jiajie

    2016-08-19

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

  3. New results from NA49

    CERN Document Server

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

    2002-01-01

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

  4. The NA52 strangelet search

    CERN Document Server

    Weber, M; Baglin, C; Beck, H P; Borer, K; Bussière, A; Elsener, K; Gorodetzky, P; Guillaud, J P; Kabana, S; Klingenberg, R; Lehmann, G; Lindén, T; Lohmann, K D; Mommsen, R K; Moser, U; Pretzl, Klaus P; Schacher, J; Spiwoks, R; Tuominiemi, Jorma

    2001-01-01

    The NA52 experiment searches for long-lived charged strangelets in 158 a GeV c/sup -1/ Pb+Pb collisions at CERN SPS. The experiment is able to identify single particles coming from the collisions at p/sub t/=0. We collected 10/sup 13/ Pb+Pb interactions looking for negatively charged strangelets and 3*10/sup 11/ Pb+Pb interactions for positively charged ones. No evidence for the production of strangelets has been observed. We present here resulting experimental differential and total upper production limits. (8 refs).

  5. Pneumonia bacteriana adquirida na comunidade

    OpenAIRE

    Machado, Lais Del Prá Netto

    2015-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2015. A pneumonia pode ser causada por diversos microrganismos e classificada de forma abrangente, havendo poucos e frágeis estudos clínicos e epidemiológicos sobre pneumonias adquiridas na comunidade (PACs). Os patógenos mais frequentes nas PACs são Streptococcus pneumoniae e Haemophilus influenzae (em pneumonias típicas) e Mycoplasma pneumoni...

  6. Identidades Homossexuais na Territorialidade Tradicionalista

    Directory of Open Access Journals (Sweden)

    Edipo Djavan dos Reis Göergen

    2015-12-01

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

  7. NaCl potentiates human fibrocyte differentiation.

    Science.gov (United States)

    Cox, Nehemiah; Pilling, Darrell; Gomer, Richard H

    2012-01-01

    Excessive NaCl intake is associated with a variety of fibrosing diseases such as renal and cardiac fibrosis. This association has been attributed to increased blood pressure as the result of high NaCl intake. However, studies in patients with high NaCl intake and fibrosis reveal a connection between NaCl intake and fibrosis that is independent of blood pressure. We find that increasing the extracellular concentration of NaCl to levels that may occur in human blood after high-salt intake can potentiate, in serum-free culture conditions, the differentiation of freshly-isolated human monocytes into fibroblast-like cells called fibrocytes. NaCl affects the monocytes directly during their adhesion. Potassium chloride and sodium nitrate also potentiate fibrocyte differentiation. The plasma protein Serum Amyloid P (SAP) inhibits fibrocyte differentiation. High levels of extracellular NaCl change the SAP Hill coefficient from 1.7 to 0.8, and cause a four-fold increase in the concentration of SAP needed to inhibit fibrocyte differentiation by 95%. Together, our data suggest that NaCl potentiates fibrocyte differentiation. NaCl-increased fibrocyte differentiation may thus contribute to NaCl-increased renal and cardiac fibrosis.

  8. NaCl potentiates human fibrocyte differentiation.

    Directory of Open Access Journals (Sweden)

    Nehemiah Cox

    Full Text Available Excessive NaCl intake is associated with a variety of fibrosing diseases such as renal and cardiac fibrosis. This association has been attributed to increased blood pressure as the result of high NaCl intake. However, studies in patients with high NaCl intake and fibrosis reveal a connection between NaCl intake and fibrosis that is independent of blood pressure. We find that increasing the extracellular concentration of NaCl to levels that may occur in human blood after high-salt intake can potentiate, in serum-free culture conditions, the differentiation of freshly-isolated human monocytes into fibroblast-like cells called fibrocytes. NaCl affects the monocytes directly during their adhesion. Potassium chloride and sodium nitrate also potentiate fibrocyte differentiation. The plasma protein Serum Amyloid P (SAP inhibits fibrocyte differentiation. High levels of extracellular NaCl change the SAP Hill coefficient from 1.7 to 0.8, and cause a four-fold increase in the concentration of SAP needed to inhibit fibrocyte differentiation by 95%. Together, our data suggest that NaCl potentiates fibrocyte differentiation. NaCl-increased fibrocyte differentiation may thus contribute to NaCl-increased renal and cardiac fibrosis.

  9. Micotoxinas e Micotoxicoses na Avicultura

    Directory of Open Access Journals (Sweden)

    Santurio JM

    2000-01-01

    Full Text Available Esta revisão tem como objetivo principal mostrar, baseado em dezenas de pesquisas realizadas, os efeitos tóxicos das micotoxinas aflatoxinas, tricotecenos, zealenona e fumonisinas sobre o desempenho das aves. O descobrimento das propriedades hepatotóxicas e hepatocarcinogênicas de algumas linhagens de Aspergillus flavus e A. parasiticus em perus, na Inglaterra, no início da década de 1960, seguida pela elucidação da estrutura de seus metabólitos tóxicos, as aflatoxinas, deu novo enfoque e prioridade para a pesquisa sobre micotoxinas. Análises de aflatoxinas realizadas no Laboratório de Análises Micotoxicológicas (LAMIC da Universidade Fedaral de Santa Maria, entre os anos de 1986 e janeiro de 2000, em 15.600 amostras de alimentos destinados principalmente ao consumo animal, demonstram que no milho analisado, 41,9% das amostras estavam contaminadas por aflatoxinas. Em surtos de aflatoxicose no campo, uma das características mais marcantes é a má absorção que se manifesta como partículas de ração mal digeridas na excreta das aves. Também observa-se, em frangos e poedeiras que recebem AFL, extrema palidez das mucosas e pernas. Dietas deficientes em riboflavina ou colecalciferol (vit. D tornaram frangos sensíveis, nos índices de desenvolvimento corporal, a concentrações muito baixas de AFL. O efeito aflatoxina nos frangos é maior na fase inicial de crescimento, ou seja, quando as aves ingeriram aflatoxina nos primeiros 21 dias de vida, e quanto maior o nível de stress do lote, menor a quantidade de AFL para afetar negativamente seu desempenho, seja na produção de carne ou de ovos. As principais micotoxinas do grupo dos tricotecenos são: toxina T-2; deoxynivalenol (DON; diacetoxyscirpenol (DAS, todas produzidas através de diversas espécies de fungos do gênero Fusarium. Além dos tricotecenos, o fusarium também pode produzir zearalenona e fumonisinas. Dessas fusarium-toxinas, somente toxina T-2 gera patologias s

  10. Fotografia na Imprensa: conflitos na câmara escura

    Directory of Open Access Journals (Sweden)

    José Lúcio da Silva Menezes

    2014-07-01

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

  11. Relative contributions of Na+/H+ exchange and Na+/HCO3- cotransport to ischemic Na-i(+) overload in isolated rat hearts

    NARCIS (Netherlands)

    Ten Hove, M; Nederhoff, MGJ; Van Echteld, CJA

    2005-01-01

    The Na+/H+ exchanger (NHE) and/or the Na+/HCO3- cotransporter (NBC) were blocked during ischemia in isolated rat hearts. Intracellular Na+ concentration ([Na+](i)), intracellular pH (pH(i)), and energy-related phosphates were measured by using simultaneous Na-23 and P-31 NMR spectroscopy. Hearts wer

  12. SISTEMI IPTV NA IP MULTIMEDIJSKEM PODSISTEMU

    OpenAIRE

    2013-01-01

    Diplomsko delo obravnava arhitekture sistemov IPTV na IP multimedijskem podsistemu ter pripadajoče storitve in funkcije IPTV na IP multimedijskem podsistemu. Predstavljene arhitekture prinašajo veliko novih funkcionalnosti, ki so podrobneje predstavljene po posameznih enotah. V nalogi je tudi podrobneje opisana arhitektura IP multimedijskega podsistema z ravninami in protokoli. Naloga se zaključuje s storitvami na takšnih arhitekturah.

  13. PREZENTACIJA RAZVALIN GRADU NA PIRAMIDI V MARIBORU

    OpenAIRE

    Šegula Seršen, Pina

    2014-01-01

    Diplomsko delo podaja predlog za ohranitev ostalin razvalin gradu na Piramidi v Mariboru. V njem načrtujemo ureditev arheološkega območja Piramida ter problematiko prezentiranja izkopanin v povezavi z umestitvijo novih kulturnih in izobraževalnih funkcij. Diplomsko delo je sestavljeno iz analitičnega in projektnega dela. V prvem delu so raziskani arhitekturni, zgodovinski in kulturnovarstveni aspekti, na podlagi katerih je razvit idejni projekt, opisan v drugem delu naloge.

  14. O consumo na vida digital

    Directory of Open Access Journals (Sweden)

    Iuri Yudi Furukita Baptista

    2016-02-01

    Full Text Available O modelo de consumo não possui as mesmas características sempre: suas relações, motivações, formatos, espaços, interesses e atividades são construções sociais que se modificam atreladas ao cenário econômico, político e tecnológico. O presente trabalho repassa o surgimento da sociedade do consumidor para então conjecturar sobre as propriedades distintivas do consumo na vida digital. O que se defende ao final é que o consumidor já não se restringe ao papel de consumir.

  15. NA-NET numerical analysis net

    Energy Technology Data Exchange (ETDEWEB)

    Dongarra, J. (Tennessee Univ., Knoxville, TN (United States). Dept. of Computer Science Oak Ridge National Lab., TN (United States)); Rosener, B. (Tennessee Univ., Knoxville, TN (United States). Dept. of Computer Science)

    1991-12-01

    This report describes a facility called NA-NET created to allow numerical analysts (na) an easy method of communicating with one another. The main advantage of the NA-NET is uniformity of addressing. All mail is addressed to the Internet host na-net.ornl.gov'' at Oak Ridge National Laboratory. Hence, members of the NA-NET do not need to remember complicated addresses or even where a member is currently located. As long as moving members change their e-mail address in the NA-NET everything works smoothly. The NA-NET system is currently located at Oak Ridge National Laboratory. It is running on the same machine that serves netlib. Netlib is a separate facility that distributes mathematical software via electronic mail. For more information on netlib consult, or send the one-line message send index'' to netlib{at}ornl.gov. The following report describes the current NA-NET system from both a user's perspective and from an implementation perspective. Currently, there are over 2100 members in the NA-NET. An average of 110 mail messages pass through this facility daily.

  16. NA-NET numerical analysis net

    Energy Technology Data Exchange (ETDEWEB)

    Dongarra, J. [Tennessee Univ., Knoxville, TN (United States). Dept. of Computer Science]|[Oak Ridge National Lab., TN (United States); Rosener, B. [Tennessee Univ., Knoxville, TN (United States). Dept. of Computer Science

    1991-12-01

    This report describes a facility called NA-NET created to allow numerical analysts (na) an easy method of communicating with one another. The main advantage of the NA-NET is uniformity of addressing. All mail is addressed to the Internet host ``na-net.ornl.gov`` at Oak Ridge National Laboratory. Hence, members of the NA-NET do not need to remember complicated addresses or even where a member is currently located. As long as moving members change their e-mail address in the NA-NET everything works smoothly. The NA-NET system is currently located at Oak Ridge National Laboratory. It is running on the same machine that serves netlib. Netlib is a separate facility that distributes mathematical software via electronic mail. For more information on netlib consult, or send the one-line message ``send index`` to netlib{at}ornl.gov. The following report describes the current NA-NET system from both a user`s perspective and from an implementation perspective. Currently, there are over 2100 members in the NA-NET. An average of 110 mail messages pass through this facility daily.

  17. IZGRADNJA MIKRO HIDROELEKTRARNE NA SKRBINSKEM POTOKU

    OpenAIRE

    Brezočnik, Simon

    2012-01-01

    Namen diplomske naloge je izgradnja mikro hidroelektrarne na Skrbinskem potoku. Predstavljene so splošne komponente potrebne za proizvajanje električne energije na manjšem vodotoku ˝Skrbinski˝ potok z možnostjo agregata do moči 36 kVA. Tema diplomske naloge je zanimiva, saj je nekoč visokogorska kmetija že imela manjšo postrojenje za samooskrbo domačije z električno energijo v mlinu na potoku Žavc in na potoku Radoljna, kjer je proizvajala električno energijo za potrebe žage torej za razrez ...

  18. A Biotecnologia na esfera pública

    OpenAIRE

    2007-01-01

    Este trabalho foca o envolvimento de cidadãos ligados à agricultura, à I&D agronómica e ao meio rural em assuntos de inovação na agricultura,tomando como caso de estudo ‘a biotecnologia na agricultura’ designada por agrobiotecnologia ou biotecnologia verde, na qual se incluem os organismos geneticamente modificados (‘OGM’) ou transgénicos. O seu uso na agricultura tem gerado desacordo entre os seus adeptos e os seus opositores, incluindo-se nestes dois grupos diversos actores. Pelo facto d...

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

    CERN Multimedia

    2002-01-01

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

  20. NaHCO3 and NaC1 tolerance in chronic renal failure.

    Science.gov (United States)

    Husted, F C; Nolph, K D; Maher, J F

    1975-08-01

    In patients with chronic renal failure, NaHCO3 therapy may correct or prevent acidemia. It has been proposed that the NaHCO3 required will not result in clinically significant Na retention comparable to that from similar increases in NaC1 intake. In each of ten patients with chronic renal failure, creatinine clearance (Ccr) range 2.5-16.8 ml/min, on an estimated 10-meq Na and C1 diet, electrolyte excretion was compared on NaHCO3 vs NaC1 supplements of 200 meq/day. Periods of NaHCO3 and NaC1 (in alternate order for successive patients) lasted 4 days, separated by reequilibration to base-line weight. Mean +/- SEM excretion (ex) of Na, C1, and HCO3 and deltaCcr and deltaweight (day 4-1) are compared below for the 4th day of NaC1 vs. NaHCO3 intake. Mean Ccr +/-SEM on day 4 of NaC1 and NaHCO3 were 10.8 +/-1.6 and 9.0 +/-1.4 ml/min, respectively (P less than 0.02). Mean systolic blood pressure (but not diastolic) increased significantly on NaC1 (P less than 0.05). No significant blood pressure changes were seen on NaHCO3. Net positive HCO3 balance occurred on NaHCO3 as indicated above and reflected a rise in mean serum HCO3 from 19 to 30 meq/liter (day 1 vs. 4) (P less than 0.01). Mechanisms for the greater excretion of Na on NaHCO3 may relate to C1 wasting as noted above on low C1 intake and limited HCO3 reabsorptive capacity. Thus, Na excretion by day 4 was greater on NaHCO3 than on NaHCO3 did Na excretion near intake (210 meq/day).

  1. Interaction between Na+/K+-pump and Na+/Ca2+-exchanger modulates intercellular communication

    DEFF Research Database (Denmark)

    Matchkov, Vladimir; Gustafsson, Helena; Rahman, Awahan;

    2007-01-01

    of Na(+)/K(+)-pump activity by removal of extracellular potassium ([K(+)](o)) also uncoupled cells, but only after inhibition of K(ATP) channels. Inhibition of the Na(+)/Ca(2+)-exchange activity by SEA0400 or by a reduction of the equilibrium potential (making it more negative) also uncoupled the cells....... Depletion of intracellular Na(+) and clamping of [Ca(2+)](i) at low concentrations prevented the uncoupling. The experiments suggest that the Na(+)/K(+)-pump may affect gap junction conductivity via localized changes in [Ca(2+)](i) through modulation of Na(+)/Ca(2+)-exchanger activity.......Ouabain, a specific inhibitor of the Na(+)/K(+)-pump, has previously been shown to interfere with intercellular communication. Here we test the hypothesis that the communication between vascular smooth muscle cells is regulated through an interaction between the Na(+)/K(+)-pump and the Na(+)/Ca(2...

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

    DEFF Research Database (Denmark)

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

    2014-01-01

    The neurological disorders familial hemiplegic migraine type 2 (FHM2), alternating hemiplegia of childhood (AHC), and rapid-onset dystonia parkinsonism (RDP) are caused by mutations of Na+,K+-ATPase α2- and α3-isoforms, expressed in glial and neuronal cells, respectively. Although these disorders...... are distinct, they overlap in phenotypical presentation. Two Na+,K+-ATPase mutations, extending the C-terminus by either 28 residues ("+28" mutation) or an extra tyrosine ("+Y"), are associated with FHM2 and RDP, respectively. We describe here functional consequences of these and other neurological disease......, addressing the question to what extent they cause a change of the intracellular Na+ and K+ concentrations ([Na+]i and [K+]i) in COS cells. C-terminal extension mutants generally showed dramatically reduced Na+ affinity without disturbance of K+ binding, as did other RDP mutants. No phosphorylation from ATP...

  3. Inelastic processes in Na+-Ne, Na+-Ar, Ne+-Na, and Ar+-Na collisions in the energy range 0.5-14 keV

    Science.gov (United States)

    Lomsadze, R. A.; Gochitashvili, M. R.; Kezerashvili, R. Ya.

    2015-12-01

    Absolute cross sections for charge-exchange, ionization, and excitation in Na+-Ne and Na+-Ar collisions were measured in the ion energy range 0.5 -10 keV using a refined version of a capacitor method and collision and optical spectroscopy methods simultaneously in the same experimental setup. Ionization cross sections for Ne+-Na and Ar+-Na collisions are measured at energies of 2 -14 keV using a crossed-beam spectroscopy method. The experimental data and the schematic correlation diagrams are used to analyze and determine the mechanisms for these processes. For the charge-exchange process in Na+-Ar collisions two nonadiabatic regions are revealed and mechanisms responsible for these regions are explained. Structural peculiarity on the excitation function for the resonance lines of argon atoms in Na+-Ar collisions are observed and the possible mechanisms of this phenomenon are explored. The measured ionization cross sections for Na+-Ne and Ne+-Na collisions in conjunction with the Landau-Zener formula are used to determine the coupling matrix element and transition probability in a region of pseudocrossing of the potential curves.

  4. Bullying na Escola: um sofrimento

    Directory of Open Access Journals (Sweden)

    Marlene Silva Sardinha Gurpilhares

    2014-07-01

    Full Text Available O bullying é uma forma de violência presente nas escolas e o termo é utilizado para caracterizar todas as formas de agressões repetitivas psicológicas e físicas, direta ou indiretamente. Esta violência causa sofrimentos, intimidação e medo, sempre numa relação de poder entre pares. Esta pesquisa trata de um estudo do bullying escolar: o que é, como surgiu, como identificá-lo e sua caracterização, conseqüências, causas, o papel da escola, de professores e pais e uma proposta prática que pode ser adotada para sua prevenção e contenção. O objetivo é organizar materiais para leitura dos atores educacionais para uma possível reflexão, através de pesquisas bibliográficas. Esta violência é grave e deveria ser tratada como saúde pública, devido às conseqüências que traz, como queda na aprendizagem, na autoestima e em casos mais graves, até o suicido e outras tragédias. A escola necessita atentar para esse tipo de violência, revendo suas ações em todos os momentos, tendo um olhar integral e diferenciado em relação aos alunos. É fundamental que o bullying não seja tratado como brincadeira de criança e para ser identificado e combatido é necessária uma ação entre a família e todos da escola, que pode ser desenvolvida através de projetos que ajudem a apontar caminhos para a solução do problema. Tais ações devem ser pautadas por constantes debates e reflexões, nas quais o aluno se torne o protagonista. Não existem fórmulas prontas, pois a intervenção deve ser feita através da realidade de cada escola.

  5. Negative electrodes for Na-ion batteries.

    Science.gov (United States)

    Dahbi, Mouad; Yabuuchi, Naoaki; Kubota, Kei; Tokiwa, Kazuyasu; Komaba, Shinichi

    2014-08-07

    Research interest in Na-ion batteries has increased rapidly because of the environmental friendliness of sodium compared to lithium. Throughout this Perspective paper, we report and review recent scientific advances in the field of negative electrode materials used for Na-ion batteries. This paper sheds light on negative electrode materials for Na-ion batteries: carbonaceous materials, oxides/phosphates (as sodium insertion materials), sodium alloy/compounds and so on. These electrode materials have different reaction mechanisms for electrochemical sodiation/desodiation processes. Moreover, not only sodiation-active materials but also binders, current collectors, electrolytes and electrode/electrolyte interphase and its stabilization are essential for long cycle life Na-ion batteries. This paper also addresses the prospect of Na-ion batteries as low-cost and long-life batteries with relatively high-energy density as their potential competitive edge over the commercialized Li-ion batteries.

  6. Razvitak naselja na kvarnerskim otocima - primjer Dobrinja

    Directory of Open Access Journals (Sweden)

    Marijan Bradanović

    2012-12-01

    Full Text Available Na dosad slabo poznatom i sa stajališta povijesti umjetnosti još posve neobrađenom primjeru Dobrinja na otoku Krku, raspravlja se o razvitku naselja na kvarnerskim otocima. Uz isticanje štetnosti dosad prevladavajućih uopćavanja, karakteristični položaj i razvitak Dobrinja tumače se u širem, komparativnom kontekstu. Analiziraju se prostiranje i obilježja pojedinih dijelova ovog naselja, a naglasak je na vremenu kasnog srednjeg i ranijeg novog vijeka. Tada je najuži dio povijesnog središta Dobrinja poprimio čvrstu, na tlorisnoj osnovi i danas, usprkos opsežnim pregradnjama i arhitektonskim preinakama, jasno uočljivu, urbanu fizionomiju.

  7. Barroco: A tempestade na Biblioteca

    Directory of Open Access Journals (Sweden)

    Diego Cervelin

    2008-12-01

    Full Text Available Desde que Heinrich Wölfflin, nos últimos vinte anos do século XIX, se interessou por trazer à tona as formas arquitetônicas do século XVII conferindo-lhes caráter autônomo de estilo histórico determinável, não é nenhuma novidade que os estudos sobre o barroco pudessem polarizar – quase sempre em um tom colérico – os pesquisadores da arte e da cultura. Em terras do Brasil, não chega a ser de todo descabido recordar a severíssima crítica operada por Sérgio Buarque de Holanda em Raízes do Brasil. O livro, que pretende detectar a avalanche de equívocos que teria povoado o passado nacional com as vistas voltadas para a concretização de um projeto de emancipação e progresso na linha da história brasileira, apresenta em seu quarto capítulo uma impugnação explícita ao passado colonial.

  8. Terapia de linguagem na afasia

    Directory of Open Access Journals (Sweden)

    Mauro Spinelli

    1977-12-01

    Full Text Available A terapia da linguagem na afasia foi estudada em 15 pacientes, 8 do sexo masculino e 7 do sexo feminino; a idade variou de menos de 10 anos a mais de 50 anos; em 11 casos a afasia era sequela de acidente vascular cerebral e, em 4, de traumatismo crânio-encefálico. Quanto ao tipo de afasia, 5 pacientes apresentavam déficits predominantemente de expressão e 10 apresentavam déficits receptivos e expressivos em graus equiparáveis. Em 6 casos a terapia foi iniciada dentro dos 3 primeiros meses de instalação do quadro; nos restantes foi iniciada mais tardiamente. Dos 15 pacientes, 11 apresentaram evolução satisfatória, a qual não depndeu do grau de afasia, do tipo de afasia, da idade do paciente, do tipo de patologia e do intervalo entre a instalação do quadro afásico e o início da terapia. A terapia da linguagem no paciente afásico é efetiva, o prognóstico não pode ser feito a priori. Somente a evolução do caso com sua retestagem criteriosa poderá dar dados realmente úteis para se falar em evolução.

  9. Anodic Synthesis and Characterization of Na-Pb-O, Na-Pb-Bi-O Crystals

    Institute of Scientific and Technical Information of China (English)

    Li Mei QIU; Fen LIU; Liang Zhong ZHAO

    2005-01-01

    Crystals of Na-Pb-O and Na-Pb-Bi-O were electrosynthesized on the anode from molten salts. The resulting crystals have a hexagonal structure, in which the base ions (Pb and Bi) are in high oxidation states. By using KOH/NaOH (atomic ratio K:Na=1:1) mixture as a flux,incorporation of K ions into the lattice is inhibited while incorporation of Bi ions is enhanced. The magnetic measurement shows that the Na-Pb-Bi-O crystals are dominated by diamagnetism.

  10. Breakup studies with {sup 23}Na

    Energy Technology Data Exchange (ETDEWEB)

    Jarvis, N.S.; Watson, D.L.; Gyapong, G.J.; Jones, C.D. [University of York, York YO1 5DD (United Kingdom); Bennett, S.J.; Freer, M.; Fulton, B.R.; Karban, O.; Murgatroyd, J.T.; Tungate, G. [University of Birmingham, Birmingham, B15 2TT (United Kingdom); Rae, W.D.M.; Smith, A.E. [University of Oxford, Oxford, OX1 3RA (United Kingdom)

    1995-05-01

    The breakup of {sup 23}Na nuclei into {sup 11}B+{sup 12}C and of {sup 24}Mg nuclei into {sup 12}C+{sup 12}C has been studied using the reactions {sup 12}C({sup 23}Na,{sup 11}B{sup 12}C){sup 12}C and {sup 12}C({sup 23}Na,{sup 12}C{sup 12}C){sup 11}B. Clear evidence was found for the breakup of the {sup 23}Na and {sup 24}Mg nuclei into the ground states of both fragments. The yieldrotect from the {sup 12}C({sup 23}Na,{sup 11}B{sub g.s.}{sup 12}C{sub g.s.}){sup 12}C{sub g.s.} reaction was concentrated in the region of excitationrotect energy in {sup 23}Na between 24 and 28 MeV and fragmented among a number of states. Therotect {sup 12}C({sup 23}Na,{sup 12}C{sub g.s.} {sup 12}C{sub g.s.)}{sup 11}B{sub g.s.} reaction was found to proceed chiefly via broad states at 22.1 and 23.9 MeV in {sup 24}Mg.

  11. Gasotransmitters: novel regulators of epithelial na(+) transport?

    Science.gov (United States)

    Althaus, Mike

    2012-01-01

    The vectorial transport of Na(+) across epithelia is crucial for the maintenance of Na(+) and water homeostasis in organs such as the kidneys, lung, or intestine. Dysregulated Na(+) transport processes are associated with various human diseases such as hypertension, the salt-wasting syndrome pseudohypoaldosteronism type 1, pulmonary edema, cystic fibrosis, or intestinal disorders, which indicate that a precise regulation of epithelial Na(+) transport is essential. Novel regulatory signaling molecules are gasotransmitters. There are currently three known gasotransmitters: nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H(2)S). These molecules are endogenously produced in mammalian cells by specific enzymes and have been shown to regulate various physiological processes. There is a growing body of evidence which indicates that gasotransmitters may also regulate Na(+) transport across epithelia. This review will summarize the available data concerning NO, CO, and H(2)S dependent regulation of epithelial Na(+) transport processes and will discuss whether or not these mediators can be considered as true physiological regulators of epithelial Na(+) transport biology.

  12. Gasotransmitters: Novel regulators of epithelial Na+ transport?

    Directory of Open Access Journals (Sweden)

    Mike eAlthaus

    2012-04-01

    Full Text Available The vectorial transport of Na+ across epithelia is crucial for the maintenance of Na+ and water homeostasis in organs such as the kidneys, lung or intestine. Dysregulated Na+ transport processes are associated with various human diseases such as hypertension, the salt-wasting syndrome pseudohypoaldosteronism type 1, pulmonary edema, cystic fibrosis or intestinal disorders, which indicate that a precise regulation of epithelial Na+ transport is essential. Novel regulatory signaling molecules are gasotransmitters. There are currently three known gasotransmitters: nitric oxide (NO, carbon monoxide (CO and hydrogen sulfide (H2S. These molecules are endogenously produced in mammalian cells by specific enzymes and have been shown to regulate various physiological processes. There is a growing body of evidence, which indicates that gasotransmitters may also regulate Na+ transport across epithelia. This review will summarize the available data concerning NO, CO and H2S dependent regulation of epithelial Na+ transport processes and will discuss whether or not these mediators can be considered as true physiological regulators of epithelial Na+ transport biology.

  13. EKSPERIMENTALNA ANALIZA VIBRACIJ NA PRALNI GRUPI

    OpenAIRE

    Kozel, Rok

    2012-01-01

    Diplomsko delo se ukvarja z vibracijami pralnega stroja. Eksperimentalno analizo smo opravili na laboratorijskem preizkuševališču, kjer je pralna grupa obešena na namenskem ogrodju. Na pralni grupi sta nameščena pospeškomera ADXL345, ki sta s serijsko SPI komunikacijo povezana z NI PXI-7841R karto. NI PXI-7841R karta je v ohišju NI PXI 1003 in je povezana z računalnikom. Pralna grupa je opremljena tudi z BLAC motorjem, s katerim operira razvojna plošča NEXYS 2. Vse skupaj nadziramo preko raču...

  14. Kornati na starim geografskim i pomorskim kartama

    OpenAIRE

    Faričić, Josip; Simičić, Zdenko

    2005-01-01

    U radu se na temelju analize kartografskih izvora analizira historijsko-geografski razvitak Kornatskih otoka, koji čine najbrojniju skupinu među hrvatskim otocima. Stare se karte koriste ponajprije kao sredstvo geografskih istraživanja, koje u nužnoj korelaciji s istovremenim povijesnim pisanim izvorima te modernim topografskim i pomorskim kartama čine osnovu za oblikovanje istraživačke platforme na kojoj se mogu graditi relevantni znanstveni rezultati. Na temelju starih karata moguće je, uz ...

  15. Nalaz tombusvirusa na vrsti Erigeron canadensis L.

    OpenAIRE

    Jeknić, Zoran; Erić, Živojin; Grbelja, Julijana

    1988-01-01

    Iz listova zaraženih primjeraka korovne biljke Erigeron canadensis L. koji su rasli na nekoliko lokaliteta u Sarajevu izoliran je virus iz skupine tombusvirusi. Identifikacija virusa izvršena je na osnovi reakcije pokusnih biljaka, analize ultratankih presjeka kroz zaraženo tkivo, morfologije i veličine virusnih čestica, te na osnovi seroloških reakcija metodom dvostruke imunodifuzije u agarskom gelu i čvrsto fazne imunoelektronske mikroskopije (SPIEM). U serološkim pokusima upotrijebljen je ...

  16. PERUBAHAN KEKERASAN DENTIN PADA SALURAN AKAR SETELAH APLIKASI NaOCl 3%, KOMBINASI NaOCl 3% - EDTA 17%, DAN NaOCl 3% - KLORHEKSIDIN 2%

    OpenAIRE

    ALFINA, RISCA

    2014-01-01

    2014 PERUBAHAN KEKERASAN DENTIN PADA SALURAN AKAR SETELAH APLIKASI NaOCl 3%, KOMBINASI NaOCl 3% - EDTA 17%, DAN NaOCl 3% - KLORHEKSIDIN 2% Risca Alfina Fakultas Kedokteran Gigi Universitas Hasanuddin ABSTRAK Latar Belakang: Beberapa larutan irigasi yang biasa digunakan saat pembersihan dan preparasi saluran akar yaitu sodium hypochlorite (NaOCl), klorheksidin, dan ethylenediaminetetraacetic acid (EDTA). Larutan irigasi tersebut berinteraks...

  17. Perfil nutricional na artrite reumatoide

    Directory of Open Access Journals (Sweden)

    Rachel Simone Maccarini Zarpellon

    2014-01-01

    Full Text Available Objetivo: Estudar o perfil nutricional de pacientes com artrite reumatoide (AR. Métodos: Estudo transversal observacional de 102 pacientes com AR. Os pacientes foram estudados para dados clínicos, demográficos, sorológicos, atividade de doença e perfil nutricional. Neste último incluiu-se a medida do índice de massa corporal (IMC, relação quadril/cintura, pregas cutâneas bicipitais (PCB e sua adequação; prega cutânea tricipital (PCT e sua adequação e circunferência muscular do braço (CMB e sua adequação. Estudos de associação foram feitos usando os testes de Fisher e qui-quadrado para dados nominais e teste t não pareado e Mann Whitney para dados numéricos. Para cálculo de correlação usou-se o teste de Spearman. Resultado: Na amostra existiam 14/102 homens e 88/102 mulheres com idade média de 52,1 ± 11,5 anos e duração média de doença de 10,6 ± 7,4 anos. A relação cintura/quadril média era de 0,92 ± 0,07. De acordo com IMC, 30,3% tinham peso normal e 65,5% tinham peso acima do normal. De acordo com PCB, 74,5% eram normais e 25,5% tinham depleção; de acordo com a PCT, 83,3% eram normais e 16,7% tinham depleção. Associação de variáveis nutricionais com gênero, fator reumatoide, nódulos e atividade da doença não mostraram diferenças (p = NS exceto, por uma relação cintura/quadril menor em indivíduos com nódulos (p = 0,02 e uma correlação modesta da PCT com a duração de doença (p = 0,02; R = 0,22; 95% IC = 0,01-0,40. Conclusão: Existe uma alta prevalência de sobrepeso e obesidade em artrite reumatoide e uma pequena frequência de depleção muscular.

  18. Waardevolle lessen na overstromingen in Thailand

    NARCIS (Netherlands)

    Jonkman, S.N.; Van der Meer, M.T.; Hardeman, B.

    2012-01-01

    Een verkenningsmissie na de overstromingen in Thailand in 2011 heeft meer inzicht gegeven in het functioneren van het waterkeringssysteem tijdens de ramp. Dijken bleken kwetsbaar door overloop, evenals de aansluitingen tussen dijken en constructies.

  19. Erythrocyte 22Na+ influx in hypertension

    Energy Technology Data Exchange (ETDEWEB)

    Shalev, O.; Eaton, J.W.; Ben-Ishay, D.

    1984-01-01

    We assessed 22Na+ uptake by erythrocytes (RBC) from 38 individuals with essential hypertension and 37 healthy controls. All subjects were male, white, non-obese and with normal renal function, obviating sex, race, hormonal, ponderal and renal factors known to influence RBC Na+ handling. The mean +/- sem 22Na+ uptake of the patients was 284 +/- 16 mumole/liter RBC/hour while that of normal controls was 249 +/- 11 mumole/liter RBC/hour; although the difference reached borderline significance, individual values showed considerable overlap. Consequently, in our population, RBC 22Na+ uptake is not a reliable marker for essential hypertension. We believe that previous studies should be reassessed with regard to patients' characteristics and future studies employ rigorous criteria in selection of subjects.

  20. Aerobe zuivering van vergiste varkensdrijfmest na aanzuren

    NARCIS (Netherlands)

    Goossens, W.

    1988-01-01

    Onderzoeksverslag betreffende een vorm van nazuivering, bedoeld om de vluchtige componenten (vetzuren), die na vergisting nog aanwezig zijn, te oxideren. De mest wordt belucht onder toevoeging van zwavelzuur. Het zure milieu voorkomt ammoniakemissie tijdens het beluchten. Bovendien zullen in volgend

  1. Hydrogen-fluorine exchange in NaBH4-NaBF4.

    Science.gov (United States)

    Rude, L H; Filsø, U; D'Anna, V; Spyratou, A; Richter, B; Hino, S; Zavorotynska, O; Baricco, M; Sørby, M H; Hauback, B C; Hagemann, H; Besenbacher, F; Skibsted, J; Jensen, T R

    2013-11-07

    Hydrogen-fluorine exchange in the NaBH4-NaBF4 system is investigated using a range of experimental methods combined with DFT calculations and a possible mechanism for the reactions is proposed. Fluorine substitution is observed using in situ synchrotron radiation powder X-ray diffraction (SR-PXD) as a new Rock salt type compound with idealized composition NaBF2H2 in the temperature range T = 200 to 215 °C. Combined use of solid-state (19)F MAS NMR, FT-IR and DFT calculations supports the formation of a BF2H2(-) complex ion, reproducing the observation of a (19)F chemical shift at -144.2 ppm, which is different from that of NaBF4 at -159.2 ppm, along with the new absorption bands observed in the IR spectra. After further heating, the fluorine substituted compound becomes X-ray amorphous and decomposes to NaF at ~310 °C. This work shows that fluorine-substituted borohydrides tend to decompose to more stable compounds, e.g. NaF and BF3 or amorphous products such as closo-boranes, e.g. Na2B12H12. The NaBH4-NaBF4 composite decomposes at lower temperatures (300 °C) compared to NaBH4 (476 °C), as observed by thermogravimetric analysis. NaBH4-NaBF4 (1:0.5) preserves 30% of the hydrogen storage capacity after three hydrogen release and uptake cycles compared to 8% for NaBH4 as measured using Sievert's method under identical conditions, but more than 50% using prolonged hydrogen absorption time. The reversible hydrogen storage capacity tends to decrease possibly due to the formation of NaF and Na2B12H12. On the other hand, the additive sodium fluoride appears to facilitate hydrogen uptake, prevent foaming, phase segregation and loss of material from the sample container for samples of NaBH4-NaF.

  2. IZDELAVA IN VODENJE AVTONOMNEGA VOZILA NA GOSENICAH

    OpenAIRE

    Obal, Aleš

    2012-01-01

    V Diplomskem delu je opisan postopek izdelave kontrolno nadzornega sistema za vodenje robota po prostoru. Ključni deli tega sistema so senzorji za merjenje orientacije in pozicije vozila na mikrokrmilniškem sistemu. Vozilu smo dodali komunikacijo z osebnim računalnikom za oddaljen nadzor in na koncu povzeli še program, ki smo ga napisali v mikroC programskem okolju.

  3. Positron-impact ionization of Na

    Energy Technology Data Exchange (ETDEWEB)

    Mukherjee, K.K. (Jawahar Navodaya Vidyalaya, Ramchandraghat, West Tripura 799207, Tripura (India)); Singh, N.R. (Thambal Marik College, Oinam, Bishanpur, Manipur (India)); Choudhury, K.B. (Department of Physics, Jadavpur University, Calcutta 700032, West Bengal (India)); Mazumdar, P.S. (Department of Physics, Manipur University, Canchipur, Imphal 795003, Manipur (India))

    1992-07-01

    In this paper we present the total cross sections for the positron-impact ionization of Na in the range 8--30 eV of the energy of the incident positron. Calculations are done by using a distorted-wave approximation incorporating the effects of screening and distortion. The present results are compared with the experimental results for the electron-impact ionization of Na.

  4. Elastic Coulomb breakup of $^{34}$Na

    CERN Document Server

    Singh, G; Chatterjee, R

    2016-01-01

    Purpose : The aim of this paper is to study the elastic Coulomb breakup of $^{34}$Na on $^{208}$Pb to give us a core of $^{33}$Na with a neutron and in the process we try and investigate the one neutron separation energy and the ground state configuration of $^{34}$Na. Method : A fully quantum mechanical Coulomb breakup theory within the architecture of post-form finite range distorted wave Born approximation extended to include the effects of deformation is used to research the elastic Coulomb breakup of $^{34}$Na on $^{208}$Pb at 100 MeV/u. The triple differential cross-section calculated for the breakup is integrated over the desired components to find the total cross-section, momentum and angular distributions as well as the average momenta, along with the energy-angular distributions. Results : The total one neutron removal cross-section is calculated to test the possible ground state configurations of $^{34}$Na. The average momentum results along with energy-angular calculations indicate $^{34}$Na to ha...

  5. Glutamate Water Gates in the Ion Binding Pocket of Na+ Bound Na+, K+-ATPase

    Science.gov (United States)

    Han, Minwoo; Kopec, Wojciech; Solov’yov, Ilia A.; Khandelia, Himanshu

    2017-01-01

    The dynamically changing protonation states of the six acidic amino acid residues in the ion binding pocket of the Na+, K+ -ATPase (NKA) during the ion transport cycle are proposed to drive ion binding, release and possibly determine Na+ or K+ selectivity. We use molecular dynamics (MD) and density functional theory (DFT) simulations to determine the protonation scheme of the Na+ bound conformation of NKA. MD simulations of all possible protonation schemes show that the bound Na+ ions are most stably bound when three or four protons reside in the binding sites, and that Glu954 in site III is always protonated. Glutamic acid residues in the three binding sites act as water gates, and their deprotonation triggers water entry to the binding sites. From DFT calculations of Na+ binding energies, we conclude that three protons in the binding site are needed to effectively bind Na+ from water and four are needed to release them in the next step. Protonation of Asp926 in site III will induce Na+ release, and Glu327, Glu954 and Glu779 are all likely to be protonated in the Na+ bound occluded conformation. Our data provides key insights into the role of protons in the Na+ binding and release mechanism of NKA. PMID:28084301

  6. Efeitos imediatos da MWM na dor, amplitude de movimento e funcionalidade, na osteoartrite da anca.

    OpenAIRE

    Beselga, Carlos

    2014-01-01

    Introdução: A mobilização com movimento (MWM), segundo o Conceito Mulligan tem apresentado bons resultados na melhoria da dor, amplitude de movimento e funcionalidade em diversas disfunções. No entanto, existem poucos estudos sobre a articulação da anca e, até este momento, não foi avaliada a sua efetividade em indivíduos com osteoartrite da anca. Objectivo(s): Avaliar os efeitos imediatos da técnica de MWM na dor, na amplitude de movimento e na função física em indivíduos com ...

  7. Elastic Coulomb breakup of 34Na

    Science.gov (United States)

    Singh, G.; Shubhchintak, Chatterjee, R.

    2016-08-01

    Background: 34Na is conjectured to play an important role in the production of seed nuclei in the alternate r -process paths involving light neutron rich nuclei very near the β -stability line, and as such, it is important to know its ground state properties and structure to calculate rates of the reactions it might be involved in, in the stellar plasma. Found in the region of `island of inversion', its ground state might not be in agreement with normal shell model predictions. Purpose: The aim of this paper is to study the elastic Coulomb breakup of 34Na on 208Pb to give us a core of 33Na with a neutron and in the process we try and investigate the one neutron separation energy and the ground state configuration of 34Na. Method: A fully quantum mechanical Coulomb breakup theory within the architecture of post-form finite range distorted wave Born approximation extended to include the effects of deformation is used to research the elastic Coulomb breakup of 34Na on 208Pb at 100 MeV/u. The triple differential cross section calculated for the breakup is integrated over the desired components to find the total cross-section, momentum, and angular distributions as well as the average momenta, along with the energy-angular distributions. Results: The total one neutron removal cross section is calculated to test the possible ground state configurations of 34Na. The average momentum results along with energy-angular calculations indicate 34Na to have a halo structure. The parallel momentum distributions with narrow full widths at half-maxima signify the same. Conclusion: We have attempted to analyze the possible ground state configurations of 34Na and in congruity with the patterns in the `island of inversion' conclude that even without deformation, 34Na should be a neutron halo with a predominant contribution to its ground state most probably coming from 33Na(3 /2+)⊗ 2 p3 /2ν configuration. We also surmise that it would certainly be useful and rewarding to test our

  8. Quasi-solid state rechargeable Na-CO2 batteries with reduced graphene oxide Na anodes.

    Science.gov (United States)

    Hu, Xiaofei; Li, Zifan; Zhao, Yaran; Sun, Jianchao; Zhao, Qing; Wang, Jianbin; Tao, Zhanliang; Chen, Jun

    2017-02-01

    Na-CO2 batteries using earth-abundant Na and greenhouse gas CO2 are promising tools for mobile and stationary energy storage, but they still pose safety risks from leakage of liquid electrolyte and instability of the Na metal anode. These issues result in extremely harsh operating conditions of Na-CO2 batteries and increase the difficulty of scaling up this technology. We report the development of quasi-solid state Na-CO2 batteries with high safety using composite polymer electrolyte (CPE) and reduced graphene oxide (rGO) Na anodes. The CPE of PVDF-HFP [poly(vinylidene fluoride-co-hexafluoropropylene)]-4% SiO2/NaClO4-TEGDME (tetraethylene glycol dimethyl ether) has high ion conductivity (1.0 mS cm(-1)), robust toughness, a nonflammable matrix, and strong electrolyte-locking ability. In addition, the rGO-Na anode presents fast and nondendritic Na(+) plating/stripping (5.7 to 16.5 mA cm(-2)). The improved kinetics and safety enable the constructed rGO-Na/CPE/CO2 batteries to successfully cycle in wide CO2 partial pressure window (5 to 100%, simulated car exhaust) and especially to run for 400 cycles at 500 mA g(-1) with a fixed capacity of 1000 mA·hour g(-1) in pure CO2. Furthermore, we scaled up the reversible capacity to 1.1 A·hour in pouch-type batteries (20 × 20 cm, 10 g, 232 Wh kg(-1)). This study makes quasi-solid state Na-CO2 batteries an attractive prospect.

  9. Quasi–solid state rechargeable Na-CO2 batteries with reduced graphene oxide Na anodes

    Science.gov (United States)

    Hu, Xiaofei; Li, Zifan; Zhao, Yaran; Sun, Jianchao; Zhao, Qing; Wang, Jianbin; Tao, Zhanliang; Chen, Jun

    2017-01-01

    Na-CO2 batteries using earth-abundant Na and greenhouse gas CO2 are promising tools for mobile and stationary energy storage, but they still pose safety risks from leakage of liquid electrolyte and instability of the Na metal anode. These issues result in extremely harsh operating conditions of Na-CO2 batteries and increase the difficulty of scaling up this technology. We report the development of quasi–solid state Na-CO2 batteries with high safety using composite polymer electrolyte (CPE) and reduced graphene oxide (rGO) Na anodes. The CPE of PVDF-HFP [poly(vinylidene fluoride-co-hexafluoropropylene)]–4% SiO2/NaClO4–TEGDME (tetraethylene glycol dimethyl ether) has high ion conductivity (1.0 mS cm−1), robust toughness, a nonflammable matrix, and strong electrolyte-locking ability. In addition, the rGO-Na anode presents fast and nondendritic Na+ plating/stripping (5.7 to 16.5 mA cm−2). The improved kinetics and safety enable the constructed rGO-Na/CPE/CO2 batteries to successfully cycle in wide CO2 partial pressure window (5 to 100%, simulated car exhaust) and especially to run for 400 cycles at 500 mA g−1 with a fixed capacity of 1000 mA·hour g−1 in pure CO2. Furthermore, we scaled up the reversible capacity to 1.1 A·hour in pouch-type batteries (20 × 20 cm, 10 g, 232 Wh kg−1). This study makes quasi–solid state Na-CO2 batteries an attractive prospect. PMID:28164158

  10. O Passeio Público do Rio de Janeiro na Literatura, na Pintura e na Fotografia do Século XIX

    Directory of Open Access Journals (Sweden)

    Solange de Aragão

    2012-06-01

    Full Text Available Este artigo tem como objetivo geral e mais amplo chamar a atenção dos pesquisadores para a importância da literatura, da pintura e da fotografia como fontes documentais para a construção da História do Paisagismo no Brasil por meio de um estudo de caso muito particular: o Passeio Público do Rio de Janeiro no século XIX. São objetivos específicos apresentar e analisar o modo como esse espaço livre público aparece na literatura, na pintura e na fotografia desse período, considerando suas transformações paisagísticas.

  11. Voltage dependence of Na translocation by the Na/K pump.

    Science.gov (United States)

    Nakao, M; Gadsby, D C

    During each complete reaction cycle, the Na/K pump transports three Na ions out across the cell membrane and two K ions in. The resulting net extrusion of positive charge generates outward membrane current but, until now, it was unclear how that net charge movement occurs. Reasonable possibilities included a single positive charge moving outwards during Na translocation; or a single negative charge moving inwards during K translocation; or either positive or negative charges moving during both translocation steps, but in unequal quantities. Any step that involves net charge movement through the membrane must have voltage-dependent transition rates. Here we report measurements of transient, voltage-dependent, displacement currents generated by the pump when its normal Na/K transport cycle has been interrupted by removal of external K and it is thus constrained to carry out Na/Na exchange. The quantity and voltage sensitivity of the charge moved during these transient currents suggests that Na translocation includes a voltage-dependent transition involving movement of one positive charge across the membrane. This single step can thus fully account for the electrogenic nature of Na/K exchange. The result provides important new insight into the molecular mechanism of active cation transport.

  12. Metallic Na formation in NaCl crystals with irradiation of electron or vacuum ultraviolet photon

    Energy Technology Data Exchange (ETDEWEB)

    Owaki, Shigehiro [Osaka Prefecture Univ., Sakai, Osaka (Japan). Coll. of Integrated Arts and Sciences; Koyama, Shigeko; Takahashi, Masao; Kamada, Masao; Suzuki, Ryouichi

    1997-03-01

    Metallic Na was formed in NaCl single crystals with irradiation of a variety of radiation sources and analyzed the physical states with several methods. In the case of irradiation of 21 MeV electron pulses to the crystal blocks, the optical absorption and lifetime measurement of positron annihilation indicated appearance of Na clusters inside. Radiation effects of electron beam of 30 keV to the crystals in vacuum showed the appearance of not only metallic Na but atomic one during irradiation with Auger electron spectroscopy. Intense photon fluxes in vacuum ultraviolet region of synchrotron radiation were used as another source and an analyzing method of ultraviolet photoelectron spectroscopy. The results showed the metallic Na layered so thick that bulk plasmon can exist. (author)

  13. Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar

    Directory of Open Access Journals (Sweden)

    D. Heinrich

    2008-05-01

    Full Text Available We present summer Na-densities and atmospheric temperatures measured 80 to 110 km above the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR. The Weber Na Lidar is part of ALOMAR, located at 69° N in Norway, 150 km north of the Arctic Circle. The sun does not set here during the summer months, and measurements require a narrowband Faraday Anomalous Dispersion Optical Filter (FADOF.

    We discuss an observed sudden enhancement in the Na number density around 22:00 UT on 1 to 2 June 2006. We compare this observation with previous summer measurements and find a frequent appearance of Na number density enhancements near local midnight. We describe the time of appearance, the altitude distribution, the duration and the strength of these enhancements and compare them to winter observations. We investigate possible formation mechanisms and, as others before, we find a strong link between these Na number density enhancements and sporadic E layers.

  14. Efeitos da cafeína na performance de exercícios de endurance

    Directory of Open Access Journals (Sweden)

    Giuliano Roberto da Silva

    2015-10-01

    Full Text Available Objetivo: verificar os efeitos da cafeína na performance de exercícios de endurance, através do teste de exaustão na bicicleta ergométrica. Método: participaram 50 indivíduos do sexo masculino, submetidos ao teste de exaustão em cicloergômetro após ingestão de 6mg/kg de cafeína (CAF (n=25; grupo cafeína, e 6mg/kg de placebo (PLA (n=25; grupo placebo, 40 minutos antes do teste. Os dados foram tratados estatisticamente, submetidos ao teste t de Student (p

  15. Functional coupling of renal K+ and Na+ handling causes high blood pressure in Na+ replete mice.

    Science.gov (United States)

    Vitzthum, Helga; Seniuk, Anika; Schulte, Laura Helene; Müller, Maxie Luise; Hetz, Hannah; Ehmke, Heimo

    2014-03-01

    A network of kinases, including WNKs, SPAK and Sgk1, is critical for the independent regulation of K+ and Na+ transport in the distal nephron. Angiotensin II is thought to act as a key hormone in orchestrating these kinases to switch from K+ secretion during hyperkalaemia to Na+ reabsorption during intravascular volume depletion, thus keeping disturbances in electrolyte and blood pressure homeostasis at a minimum. It remains unclear, however, how K+ and Na+ transport are regulated during a high Na+ intake, which is associated with suppressed angiotensin II levels and a high distal tubular Na+ load. We therefore investigated the integrated blood pressure, renal, hormonal and gene and protein expression responses to large changes of K+ intake in Na+ replete mice. Both low and high K+ intake increased blood pressure and caused Na+ retention. Low K+ intake was accompanied by an upregulation of the sodium-chloride cotransporter (NCC) and its activating kinase SPAK, and inhibition of NCC normalized blood pressure. Renal responses were unaffected by angiotensin AT1 receptor antagonism, indicating that low K+ intake activates the distal nephron by an angiotensin-independent mode of action. High K+ intake was associated with elevated plasma aldosterone concentrations and an upregulation of the epithelial sodium channel (ENaC) and its activating kinase Sgk1. Surprisingly, high K+ intake increased blood pressure even during ENaC or mineralocorticoid receptor antagonism, suggesting the contribution of aldosterone-independent mechanisms. These findings show that in a Na+ replete state, changes in K+ intake induce specific molecular and functional adaptations in the distal nephron that cause a functional coupling of renal K+ and Na+ handling, resulting in Na+ retention and high blood pressure when K+ intake is either restricted or excessively increased.

  16. Recent results from NA61/SHINE

    CERN Document Server

    Kowalski, Seweryn

    2015-01-01

    The aim of the NA61/SHINE ion programme is to explore the QCD phase diagram within the range of thermodynamical variables accessible by the SPS. Moreover the experiment provides precision hadron production measurements to improve computation of neutrino fluxes in neutrino oscillation experiments and for improving air shower simulations of cosmic-ray experiments. The main physics goals of the NA61/SHINE ion programme are the study of the properties of the onset of deconfinement and the search for signatures of the critical point of strongly interacting matter. These goals are pursued by performing an energy (beam momentum 13A – 158 A GeV/c) and system size (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La) scan. This paper reviews the status and results of the NA61/SHINE experiment.

  17. Eletrencefalograma na síndrome parkinsoniana

    Directory of Open Access Journals (Sweden)

    José Geraldo Camargo Lima

    1973-09-01

    Full Text Available Foram estudados os eletrencefalogramas de 50 pacientes parkinsonianos livres de qualquer antecedente convulsivo, sendo registrados traçados anormais em 40% dos casos. A incidência de traçados anormais foi maior na síndrome parkinsoniana bilateral do que na unilateral (52% e 25%, respectivamente. Entre as anormalidades assinaladas foram as paroxísticas as mais freqüentes (65% dos casos, caracterizando-se predominantemente por surtos de ondas teta. O registro de anormalidades paroxísticas do tipo irritativo encontrado em três casos é salientado. Alterações da atividade de base foram assinaladas em 35% dos pacientes. A idade dos pacientes não parece ter tido importante papel na gênese das anormalidades eletrencefalográficas.

  18. Tecnologia simplificada na enfermagem materno infantil

    Directory of Open Access Journals (Sweden)

    Selma Campestrini

    1991-09-01

    Full Text Available A autora apresenta três modelos de tecnologia simplificada da enfermagem materno infantil: o equipamento didático SEIO COBAIA para treinar exercícios e massagens da mama e mamilo; a peça indumentária SUPRETRAUMA - sutiã preventivo de traumatismo mamilar - usado por gestantes; e, a técnica para reverter mamilo umbilicado durante o puerperio imediato. Além de corroborar na promoção do aleitamento materno e na prevenção de desmame precoce, demonstra a possibilidade da enfermagem relacionar o saber teórico-científico com o saber tecnico-prático, na saúde da mulher e da criança, com tecnologia adequada às necessidades, à compreensão e ao bem estar da população.

  19. Labirintos na cidade contemporânea

    Directory of Open Access Journals (Sweden)

    Edson Luiz André de Sousa

    Full Text Available Este artigo pretende tensionar pontos de conexão e diluição de fronteiras entre as categorias público/privado, conversando com a literatura de Baudelaire e W. Benjamin, Fredric Jamenson e Marc Augé. Através da imagem do labirinto, símbolo da cidade antiga que se quis extinguir na cidade moderna, busca-se refletir sobre alguns caminhos e caminhantes considerados excedentes na cidade contemporânea. O cenário propulsor dessa reflexão é a experiência do jornal Boca de Rua, elaborado por moradores de rua na cidade de Porto Alegre.

  20. Rastreabilidade de componentes na cadeia de fornecimento

    OpenAIRE

    2005-01-01

    Como pouco se conhece sobre a aplicação e uso da tecnologia de RFID (Identificação por rádio frequência) na Identificação automática e recolha e dados de componentes na cadeia de fornecimento num contexto de rastreabilidade, o presente trabalho visa procurar conhecer melhor os fenómenos em estudo através de novas questões, novas explicações, tentando indagar as características e as alterações que esta tecnologia irá provocar na gestão da cadeia de fornecimento. A cadeia d...

  1. Knjige o kartografskim projekcijama na internetu

    Directory of Open Access Journals (Sweden)

    Nedjeljko Frančula

    2011-12-01

    Full Text Available U ovom prikazu skrećemo pozornost na neke knjige o kartografskim projekcijama koje su prvobitno objavljene u tisku, a potom digitalizirane i besplatno stavljene na mrežu. Neke od tih knjiga nude se na mreži kao Google e-knjige. Google godinama skuplja knjige kojima su istekla autorska prava i digitalizira ih. Fotografira se svaka stranica te zatim spaja u jednu veliku fotografiju iz koje se izvlači tekst softverom OCR. Google čuva originalnu digitalnu fotografiju u svom arhivu, a izvučeni tekst pretvara u formate HTML, PDF ili EPUB. Google danas nudi više od milijun besplatnih e-knjiga (http://www.google.com/books.

  2. Diffusion of propylene adsorbed in Na-Y and Na-ZSM5 zeolites: Neutron scattering and FTIR studies

    Indian Academy of Sciences (India)

    S Gautam; A K Tripathi; V S Kamble; S Mitra; R Mukhopadhyay

    2008-11-01

    Here we report the quasielastic neutron scattering and FTIR studies on the dynamics of propylene adsorbed in Na-Y and Na-ZSM5 zeolites. QENS data show that although the mechanism of translational motion of propylene is jump diffusion in both the cases of Na-Y and Na-ZSM5 zeolites, the diffusivity is affected by the host size and is hindered in the case of Na-ZSM5. FTIR studies showed that guest–host interaction in Na-ZSM5 is stronger than that in Na-Y zeolite corroborating the QENS results.

  3. UPORABA TEHNOLOGIJE VOIP NA MOBILNIH NAPRAVAH SYMBIAN

    OpenAIRE

    Uršič, Tine

    2013-01-01

    V sklopu diplomskega dela smo razvili aplikacijo, katere cilj je nižanje stroškov klicev s pomočjo tehnologije VoIP. Ta za komunikacijo uporablja protokol IP in zaobide potrebo po navadnih in dražjih GSM klicih. V času načrtovanja aplikacije je bilo okolje Symbian najbolj razširjena mobilna platforma za dovolj zmogljive, t.i. »pametne telefone«, ki lahko poganjajo VoIP aplikacije. Izbrali smo skupek knjižnic, poimenovanih Qt, ki omogočajo enostavno prenosljivost na druge platforme. Podr...

  4. Recent results and prospects from NA62

    Directory of Open Access Journals (Sweden)

    Bizzeti Andrea

    2016-01-01

    K+ → π+ vv̄ is a theoretically very clean decay where indirect effects of new physics may be detectable. The NA62 apparatus has been significantly upgraded between 2008 and 2014 in order to measure the branching ratio of this decay with 10% precision. The NA62 experiment took data with the new setup in pilot runs in 2014 and 2015, reaching the design beam intensity. Results of first data quality studies in view of the 2016-2017 physics runs are presented.

  5. O problema do conhecimento verdadeiro na epidemiologia

    Directory of Open Access Journals (Sweden)

    Ayres José Ricardo de Carvalho Mesquita

    1992-01-01

    Full Text Available São examinadas as bases filosóficas da validação do conhecimento científico, com o intuito de estabelecer uma visão crítica a respeito da adoção das proposições de Popper na epidemiologia. Ressalta-se o caráter conservador que resulta das limitações técnicas implicadas na sua adoção, não obstante o evidente aumento da racionalidade e da criatividade heurística que propicia.

  6. Abordagem neurologica na sindrome do X fragil

    OpenAIRE

    Marilisa Mantovani Guerreiro

    1993-01-01

    Resumo: Com o propósito de realizar a abordagem neurológica na Síndrome do X Frágil (SXF), estudaram-se 11 pacientes com este diagnóstico citogenético. A idade variou de 8 a 19 anos. Nove pacientes eram do sexo masculino e dois do feminino. Todos os indivíduos apresentaram pavilhões auriculares grandes e faces alongadas. Observou-se fronte proeminente em 63% dos casos e macrorquidia em 33% dentre aqueles do sexo masculino. Atraso na aquisição da fala, fala repetitiva, perseverativa, impulsiva...

  7. Qualidade de vida sexual na menopausa

    OpenAIRE

    2011-01-01

    A Qualidade de Vida Sexual é um termo habitualmente usado, para abranger aspectos relacionados com a ausência ou presença de problemas sexuais, satisfação e bem-estar sexual, sendo esta bastante subjectiva. Neste sentido, é fundamental rememorar que a presença de problemas sexuais não é, de todo sinónimo de má qualidade de vida sexual. Na verdade, a sexualidade na menopausa inclui, igualmente, sexo, relaxamento, comunicação e intimidade partilhada entre o casal, como em qualquer outra etapa d...

  8. Concentration dependence of Li+/Na+ diffusion in manganese hexacyanoferrates

    Science.gov (United States)

    Takachi, Masamitsu; Fukuzumi, Yuya; Moritomo, Yutaka

    2016-06-01

    Manganese hexacyanoferrates (Mn-HCFs) with a jungle-gym-type structure are promising cathode materials for Li+/Na+ secondary batteries (LIBs/SIBs). Here, we investigated the diffusion constants D Li/D Na of Li+/Na+ against the Li+/Na+ concentration x Na/x Li and temperature (T) of A 1.32Mn[Fe(CN)6]0.833.6H2O (A = Li and Na). We evaluated the activation energy E\\text{a}\\text{Li}/E\\text{a}\\text{Na} of D Li/D Na against x Na/x Li. We found that E\\text{a}\\text{Na} steeply increases with x Na from 0.41 eV at x Na = 0.69 to 0.7 eV at 1.1. The increase in E\\text{a}\\text{Na} is ascribed to the occupancy effect of the Na+ site. The increase in E\\text{a}\\text{Li} is suppressed, probably because the number of Li+ sites is three times that of Na+ sites.

  9. NA49: lead-lead collision

    CERN Document Server

    1996-01-01

    This is an image of an actual lead ion collision taken from tracking detectors on the NA49 experiment, part of the heavy ion project at CERN. These collisions produce a very complicated array of hadrons as the heavy ions break up. It is hoped that one of these collisions will eventually create a new state of matter known as quark-gluon plasma.

  10. Categoria de gênero na enfermagem

    Directory of Open Access Journals (Sweden)

    Alcione Leite da Silva

    1999-03-01

    Full Text Available Este estudo teve por objetivo analisar as categorias de gênero, a partir de periódicos sobre estudo de gênero na enfermagem brasileira. Usando uma abordagem exploratória, analisamos os artigos na área, publicados em dez periódicos nacionais de enfermagem, no período de 1955 a 1997/1. Com base na análise dos discursos, as categorias centrais para as quais convergiram as atenções das/os autoras/es foram: gênero e determinantes históricos e sociais no desenvolvimento da profissão de enfermagem, gênero e trabalho, gênero e saúde, gênero e educação e gênero e feminismo. Outras perspectivas importantes, menos enfatizadas, mas emergentes na literatura de enfermagem foram: gênero e cuidado, gênero e família, gênero e violência.

  11. Trapping of radioactive {sup 21}Na

    Energy Technology Data Exchange (ETDEWEB)

    Kruithof, Wilbert L.; Hoek, Duurt J. van der; Giri, Gouri S.; Hoekstra, Ronnie; Hoekstra, Steven; Jungmann, Klaus; Onderwater, Gerco; Santra, Bodhaditya; Shildling, Praveen D.; Sohani, Moslem; Versolato, Oscar O.; Willmann, Lorenz; Wilschut, Hans W. [Kernfysisch Versneller Instituut, University Groningen (Netherlands)

    2010-07-01

    Radioactive {sup 21}Na atoms in a magneto-optical trap (MOT) provide an excellent opportunity to search for non-Standard Model contributions in the weak interactions. In particular, correlations between the {beta}-particle and the neutrino are sensitive to time reversal symmetry violating effects. The Na isotope is produced at the TRI{mu}P facility of the KVI using intense {sup 20}Ne beams from the AGOR cyclotron on a cooled deuterium target. The isotopes are stopped and re-thermalized in a Thermal Ionizer. They are transported as a low energy ion beam to a MOT cell where they are neutralized and subsequently captured by laser light. The trapped Na atoms will be transferred to a second MOT which is placed inside a reaction microscope to measure the momentum distribution of the recoiling daughter nuclei after the {beta}-decay. The {beta}-particle will be detected in a scintillation detector. These two devices have been characterized. A pulsed UV laser was used to ionize trapped Na atoms in order to simulate the {beta}-decay in the reaction microscope. The momentum distribution of the recoil ions is measured. The setup of the whole experiment will be presented.

  12. Concentratie gewasbeschermingsmiddelen na verhitting dompelbad bloembollen

    NARCIS (Netherlands)

    Bulle, A.A.E.; Lans, van der A.M.; Aanholt, van J.T.M.

    2014-01-01

    De meest gebruikte methode van ontsmetting van bloembollen en –knollen is een dompeling in een mix van fungiciden. In het proces van bolontsmetting worden partijen bollen na elkaar ontsmet in hetzelfde dompelbad. Met een partij bollen kan een dompelbad behoorlijk vervuild raken met bijvoorbeeld (ste

  13. Habitus professoral na sala de aula virtual

    Directory of Open Access Journals (Sweden)

    Alexandre Marinho Pimenta

    2014-09-01

    Full Text Available Entendendo que a indiferença na ação pedagógica contribui para a reprodução das desigualdades no sistema de ensino, o presente artigo busca captar, a partir de entrevistas semiestruturadas, traços do habitus de professores supervisores de disciplinas do curso de Licenciatura em Pedagogia na modalidade a distância na Universidade de Brasília - UnB no âmbito do Sistema Universidade Aberta do Brasil - UAB. As orientações metodológicas de Bourdieu (2007 foram um dos elementos orientadores na análise das entrevistas, considerando ainda o uso heurístico do conceito de habitus. Conclui-se que o habitus professoral envolve esforços voluntários em busca de uma ação pedagógica diferenciada. No entanto, ele é ambíguo e condescendente frente aos limites do modelo de EaD no âmbito da UAB. Ao fim, os dados analisados permitem fornecer elementos para reorientação político-pedagógica que vise a um novo modelo de EaD nacional.

  14. Electronic Polarisability of NaNO2-NaNO3 and NaOH-NaNO3 Ionic Melts and Effective Ionic Radius of OH-

    Science.gov (United States)

    Iwadate, Yasuhiko; Ohnishi, Ryosuke; Ohkubo, Takahiro

    2017-01-01

    Molar volumes and refractive indexes of molten NaNO2-NaNO3 and NaOH-NaNO3 systems were measured by dilatometry and goniometry, respectively. The molar volumes of both systems increased with increasing temperature. Refractive indexes decreased with a rise of temperature or with increasing wavelength of the incident visible light. Assuming that the electronic polarisability is inherent in an ion, the electronic polarisability of a OH- ion in the melt was estimated from the Lorentz-Lorenz equation to be 1.26×10-30 m3, being comparable with that in the crystal. The effective ionic radius of a OH- ion was evaluated from the obtained electronic polarisability to be 1.34×10-10 m, using the correlation between the third power of the ionic radius and the electronic polarisability of an ion so far reported. The effective ionic radius obtained in this work was in good agreement with that assigned by Shannon.

  15. NA48: Wiring up for Change

    CERN Multimedia

    2001-01-01

    The NA48 Collaboration is rebuilding its drift chambers ready for the experiment to start up again this coming July. An intricate task involving the soldering of over 24,000 wires! The future of the NA48 experiment is coming right down to the wire, that is, the wires which the Collaboration is installing in the clean room of Hall 887 on the Prévessin site. Six days a week, technicians are working in shifts to rebuild the experiment's drift chambers. The original chambers were damaged when a section of a vacuum tube imploded at the end of 1999. A year ago, CERN gave the green light for this essential part of the spectrometer to be rebuilt, so the NA48 experiment, which studies CP violation (see box), still has a bright future ahead of it. Three years of data-taking ahead The NA48 experiment aims to penetrate the secrets of CP (Charge Parity) violation. Charge and parity are two parameters which distinguish a particle from an antiparticle. In other words, an electron possesses a negative electric ...

  16. Probing luminescence centers in Na rich feldspar

    DEFF Research Database (Denmark)

    Prasad, Amit Kumar; Lapp, Torben; Kook, Myung Ho;

    2016-01-01

    our understanding of the luminescence mechanisms and recombination sites, in a sample of Na rich plagioclase feldspar (oligoclase). Both the UV and violet–blue emissions show resonant excitations arising from a distribution of energy levels. We propose, contrary to the general understanding...

  17. Recent results and prospects from NA62

    Science.gov (United States)

    Bizzeti, Andrea

    2016-11-01

    A large sample of charged kaon decays in 2007 has been collected by the NA62 experiment at CERN SPS using the experimental setup of the former NA48 experiment. Its intense kaon beam provides an abundant source of tagged neutral pions in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion from 1:05 × 106 fully reconstructed π0 Dalitz decays is presented. The obtained preliminary value a = (3.70 ± 0.53stat ± 0.36syst) × 10-2 is the first 5.8σ observation of a non-zero slope in the time-like region of momentum transfer. K+ → π+ vv¯ is a theoretically very clean decay where indirect effects of new physics may be detectable. The NA62 apparatus has been significantly upgraded between 2008 and 2014 in order to measure the branching ratio of this decay with 10% precision. The NA62 experiment took data with the new setup in pilot runs in 2014 and 2015, reaching the design beam intensity. Results of first data quality studies in view of the 2016-2017 physics runs are presented.

  18. Presoja notranjih kontrol pri obračunu davka na dodano vrednost na primeru "Podjetja x"

    OpenAIRE

    Majcen, Borut

    2016-01-01

    Poslovanje podjetja si je ob odsotnosti notranjih kontrol nemogoče predstavljati. Podjetja so podvržena raznim tveganjem, še posebej v današnjih razmerah globalnega poslovanja, ko se podjetja soočajo z vedno novimi izzivi, kar prinaša tudi nova tveganja. Najučinkovitejši ukrep za obvladovanje tveganj predstavlja vzpostavitev sistema notranjih kontrol. Obvladovanje tveganj pa ne poteka samo na ravni podjetja kot celote, ampak je prisotno na vseh področjih delovanja podjetja, torej tudi na p...

  19. Water transport by the renal Na(+)-dicarboxylate cotransporter

    DEFF Research Database (Denmark)

    Meinild, A K; Loo, D D; Pajor, A M;

    2000-01-01

    This study investigated the ability of the renal Na(+)-dicarboxylate cotransporter, NaDC-1, to transport water. Rabbit NaDC-1 was expressed in Xenopus laevis oocytes, cotransporter activity was measured as the inward current generated by substrate (citrate or succinate), and water transport...... was monitored by the changes in oocyte volume. In the absence of substrates, oocytes expressing NaDC-1 showed an increase in osmotic water permeability, which was directly correlated with the expression level of NaDC-1. When NaDC-1 was transporting substrates, there was a concomitant increase in oocyte volume....... This solute-coupled influx of water took place in the absence of, and even against, osmotic gradients. There was a strict stoichiometric relationship between Na(+), substrate, and water transport of 3 Na(+), 1 dicarboxylate, and 176 water molecules/transport cycle. These results indicate that the renal Na...

  20. Biossegurança na odontologia

    Directory of Open Access Journals (Sweden)

    André Luiz Dantas Bezerra

    2014-04-01

    Full Text Available Introdução: As atividades laborais, de modo geral, expõem os trabalhadores a riscos ocupacionais dos mais variados. Esses riscos incluem agentes físicos, químicos, ergonômicos, de acidentes e biológicos. O contato rotineiro com esses últimos deve ser motivo de reflexão e intervenção. Objetivo: Descrever os aspectos da biossegurança na odontologia. Métodos: Foi realizada uma revisão do estado da arte, adotando-se critérios para análise dos trabalhos mais diretamente relacionados à prática odontológica. A partir dos descritores controlados (DeCS "biossegurança" e "odontologia", procederam-se a busca na Literatura Latino-Americana e do Caribe em Ciências da Saúde, na Scientific Electronic Library Online, na National Library of Medicine e na Biblioteca Cochrane. Resultados: Com a associação entre os DeCS, chegou-se a 66 artigos, porém, após refinamento foram incluídos nesta revisão 12 artigos. Nos resultados foi evidenciado que a produção científica sobre biossegurança é vasta, bem como é ampla na odontologia, contudo, quando da concentração de trabalhos contempladores da associação dos termos biossegurança e odontologia, a quantidade de estudos diminui consideravelmente. Não obstante, as pesquisas foram, em sua maioria, desenvolvidas por estudiosos nacionais, da região nordeste e evidenciaram que o conhecimento e a adoção de medidas de segurança biológica na área ainda são insuficientes para garantir a proteção da equipe e dos pacientes qualitativamente. Conclusão: Sugere-se que as normas de precaução padrão sejam seguidas rigidamente e que ações de educação sejam promovidas entre os profissionais.

  1. Laser trapping of {sup 21}Na atoms

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Zheng-Tian

    1994-09-01

    This thesis describes an experiment in which about four thousand radioactive {sup 21}Na (t{sub l/2} = 22 sec) atoms were trapped in a magneto-optical trap with laser beams. Trapped {sup 21}Na atoms can be used as a beta source in a precision measurement of the beta-asymmetry parameter of the decay of {sup 21}Na {yields} {sup 21}Ne + {Beta}{sup +} + v{sub e}, which is a promising way to search for an anomalous right-handed current coupling in charged weak interactions. Although the number o trapped atoms that we have achieved is still about two orders of magnitude lower than what is needed to conduct a measurement of the beta-asymmetry parameter at 1% of precision level, the result of this experiment proved the feasibility of trapping short-lived radioactive atoms. In this experiment, {sup 21}Na atoms were produced by bombarding {sup 24}Mg with protons of 25 MeV at the 88 in. Cyclotron of Lawrence Berkeley Laboratory. A few recently developed techniques of laser manipulation of neutral atoms were applied in this experiment. The {sup 21}Na atoms emerging from a heated oven were first transversely cooled. As a result, the on-axis atomic beam intensity was increased by a factor of 16. The atoms in the beam were then slowed down from thermal speed by applying Zeeman-tuned slowing technique, and subsequently loaded into a magneto-optical trap at the end of the slowing path. The last two chapters of this thesis present two studies on the magneto-optical trap of sodium atoms. In particular, the mechanisms of magneto-optical traps at various laser frequencies and the collisional loss mechanisms of these traps were examined.

  2. Synthesis of Na-A and/or Na-X zeolite/porous carbon composites from carbonized rice husk

    Science.gov (United States)

    Katsuki, Hiroaki; Komarneni, Sridhar

    2009-07-01

    Na-A and/or Na-X zeolite/porous carbon composites were prepared under hydrothermal conditions by NaOH dissolution of silica first from carbonized rice husk followed by addition of NaAlO 2 and in situ crystallization of zeolites i.e., using a two-step process. When a one-step process was used, both Na-A and Na-X zeolites crystallized on the surface of carbon. Na-A or Na-X zeolite crystals were prepared on the porous carbonized rice husk at 90 °C for 2-6 h by changing the SiO 2/Al 2O 3, H 2O/Na 2O and Na 2O/SiO 2 molar ratios of precursors in the two-step process. The surface area and NH 4+-cation exchange capacity (CEC) of Na-A zeolite/porous carbon were found to be 171 m 2/g and 506 meq/100 g, respectively, while those of Na-X zeolite/porous carbon composites were 676 m 2/g and 317 meq/100 g, respectively. Na-A and Na-X zeolites are well-known microporous and hydrophilic materials while carbonized rice husk was found to be mesoporous (pores of ˜3.9 nm) and hydrophobic. These hybrid microporous-mesoporous and hydrophilic-hydrophobic composites are expected to be useful for decontamination of metal cations as well as organic contaminants simultaneously.

  3. Effects of non-uniform root zone salinity on water use, Na+ recirculation, and Na+ and H+ flux in cotton.

    Science.gov (United States)

    Kong, Xiangqiang; Luo, Zhen; Dong, Hezhong; Eneji, A Egrinya; Li, Weijiang

    2012-03-01

    A new split-root system was established through grafting to study cotton response to non-uniform salinity. Each root half was treated with either uniform (100/100 mM) or non-uniform NaCl concentrations (0/200 and 50/150 mM). In contrast to uniform control, non-uniform salinity treatment improved plant growth and water use, with more water absorbed from the non- and low salinity side. Non-uniform treatments decreased Na(+) concentrations in leaves. The [Na(+)] in the '0' side roots of the 0/200 treatment was significantly higher than that in either side of the 0/0 control, but greatly decreased when the '0' side phloem was girdled, suggesting that the increased [Na(+)] in the '0' side roots was possibly due to transportation of foliar Na(+) to roots through phloem. Plants under non-uniform salinity extruded more Na(+) from the root than those under uniform salinity. Root Na(+) efflux in the low salinity side was greatly enhanced by the higher salinity side. NaCl-induced Na(+) efflux and H(+) influx were inhibited by amiloride and sodium orthovanadate, suggesting that root Na(+) extrusion was probably due to active Na(+)/H(+) antiport across the plasma membrane. Improved plant growth under non-uniform salinity was thus attributed to increased water use, reduced leaf Na(+) concentration, transport of excessive foliar Na(+) to the low salinity side, and enhanced Na(+) efflux from the low salinity root.

  4. $^{24}$Mg($p$, $\\alpha$)$^{21}$Na reaction study for spectroscopy of $^{21}$Na

    CERN Document Server

    Cha, S M; Kim, A; Lee, E J; Ahn, S; Bardayan, D W; Chipps, K A; Cizewski, J A; Howard, M E; Manning, B; O'Malley, P D; Ratkiewicz, A; Strauss, S; Kozub, R L; Matos, M; Pain, S D; Pittman, S T; Smith, M S; Peters, W A

    2015-01-01

    The $^{24}$Mg($p$, $\\alpha$)$^{21}$Na reaction was measured at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory in order to better constrain spins and parities of energy levels in $^{21}$Na for the astrophysically important $^{17}$F($\\alpha, p$)$^{20}$Ne reaction rate calculation. 31 MeV proton beams from the 25-MV tandem accelerator and enriched $^{24}$Mg solid targets were used. Recoiling $^{4}$He particles from the $^{24}$Mg($p$, $\\alpha$)$^{21}$Na reaction were detected by a highly segmented silicon detector array which measured the yields of $^{4}$He particles over a range of angles simultaneously. A new level at 6661 $\\pm$ 5 keV was observed in the present work. The extracted angular distributions for the first four levels of $^{21}$Na and Distorted Wave Born Approximation (DWBA) calculations were compared to verify and extract angular momentum transfer.

  5. Asphericity in the Fermi Surface and Fermi Energy of Na-K, Na-Rb and Na-Cs Binary Alloys

    Institute of Scientific and Technical Information of China (English)

    Minal H. Patel; A.M. Vora; P.N. Gajjar; A.R. Jani

    2002-01-01

    Detailed theoretical investigations into asphericity in the Fermi surface (FS) and Fermi energy (FE) ofNa1_xKx, Na1_xRbx, and Na1_xCsx binary solid solutions are carried out for the first time. The alloying behavior ofthe K, Rb, and Cs with the Na generates the Fermi surface distortion (FSD) of bce simple metals. The FS of Na-K,Na-Rb, and Na-Cs solid solution is a distorted sphere with the largest deviation along [110]. We have found that theimpact of local-field correction function on FSD is maximun at [100] point and minimum at [111] point. The exchangeand correlation effect is found to suppress the value of FE.

  6. Phase Equilibria of Quaternary SystemNaCl-NaBr-Na2B4O7-H2O at 348 K

    Institute of Scientific and Technical Information of China (English)

    LI Ting; SANG Shi-hua; CUI Rui-zhi; ZHANG Kai-jie

    2013-01-01

    The phase equilibria of quatemary system NaC1-NaBr-Na2B4O7-H2O at 348 K were studied by the isothermal equilibrium method.The solubilities and densities of the equilibrium solution were determined.According to the experimental data,the phase diagram,density-composition diagrams and water content diagram of the quaternary system at 348 K were plotted respectively.And the phase diagram consists of one univariant curve,two crystallization fields and without any invariant point of the quaternary system.The equilibrium solid phases of the two crystallization fields were Na(C1,Br) and Na2B4O7·SH2O.The experimental results show that the quaternary system contained solid solution.The densities of the solution decrease with increasing NaC1 concentration and increase with increasing NaBr concentration.

  7. Regulation of cardiac myocyte contractility by phospholemman: Na+/Ca2+ exchange versus Na+ -K+ -ATPase.

    Science.gov (United States)

    Song, Jianliang; Zhang, Xue-Qian; Wang, JuFang; Cheskis, Ellina; Chan, Tung O; Feldman, Arthur M; Tucker, Amy L; Cheung, Joseph Y

    2008-10-01

    Phospholemman (PLM) regulates cardiac Na(+)/Ca(2+) exchanger (NCX1) and Na(+)-K(+)-ATPase in cardiac myocytes. PLM, when phosphorylated at Ser(68), disinhibits Na(+)-K(+)-ATPase but inhibits NCX1. PLM regulates cardiac contractility by modulating Na(+)-K(+)-ATPase and/or NCX1. In this study, we first demonstrated that adult mouse cardiac myocytes cultured for 48 h had normal surface membrane areas, t-tubules, and NCX1 and sarco(endo)plasmic reticulum Ca(2+)-ATPase levels, and retained near normal contractility, but alpha(1)-subunit of Na(+)-K(+)-ATPase was slightly decreased. Differences in contractility between myocytes isolated from wild-type (WT) and PLM knockout (KO) hearts were preserved after 48 h of culture. Infection with adenovirus expressing green fluorescent protein (GFP) did not affect contractility at 48 h. When WT PLM was overexpressed in PLM KO myocytes, contractility and cytosolic Ca(2+) concentration ([Ca(2+)](i)) transients reverted back to those observed in cultured WT myocytes. Both Na(+)-K(+)-ATPase current (I(pump)) and Na(+)/Ca(2+) exchange current (I(NaCa)) in PLM KO myocytes rescued with WT PLM were depressed compared with PLM KO myocytes. Overexpressing the PLMS68E mutant (phosphomimetic) in PLM KO myocytes resulted in the suppression of I(NaCa) but had no effect on I(pump). Contractility, [Ca(2+)](i) transient amplitudes, and sarcoplasmic reticulum Ca(2+) contents in PLM KO myocytes overexpressing the PLMS68E mutant were depressed compared with PLM KO myocytes overexpressing GFP. Overexpressing the PLMS68A mutant (mimicking unphosphorylated PLM) in PLM KO myocytes had no effect on I(NaCa) but decreased I(pump). Contractility, [Ca(2+)](i) transient amplitudes, and sarcoplasmic reticulum Ca(2+) contents in PLM KO myocytes overexpressing the S68A mutant were similar to PLM KO myocytes overexpressing GFP. We conclude that at the single-myocyte level, PLM affects cardiac contractility and [Ca(2+)](i) homeostasis primarily by its direct

  8. Hidroginástica na terceira idade

    Directory of Open Access Journals (Sweden)

    Karla Campos de Paula

    1998-02-01

    Full Text Available O processo de envelhecimento no indivíduo saudável está relacionado com inúmeras alterações psicológicas e físicas que interferem na área motora, concorrendo para a inatividade e contribuindo para o aparecimento e agravamento de determinadas doenças, além de influenciar negativamente a realização das atividades de vida diária. Portanto, a prática de atividade física é fundamental para o idoso, não só na prevenção de doenças como na reabilitação de suas habilidades motoras, promovendo um estilo de vida saudável que é fator preponderante para a melhoria da qualidade de vida. Contudo, algumas precauções devem ser adotadas na prescrição da atividade direcionada para o idoso, a fim de que esta seja segura e prazerosa. Dentre os exercícios mais adequados aos idosos estão a caminhada, o ciclismo, a natação e a hidroginástica. Devido a sua grande procura, a hidroginástica vem aumentando o número de adeptos na terceira idade. Ela propicia ao idoso o aumento de sua capacidade aeróbia, força muscular, flexibilidade articular e o treinamento de habilidades específicas como equilíbrio e coordenação motora. Soma-se ainda o fato de esta atividade oferecer ambiente de relaxamento e incentivo ao contato social, atuando no combate ao estresse, depressão, na melhoria da autopercepção corporal e da auto-estima. Devemos, então, estar atentos às particularidades da hidroginástica, a fim de aproveitar todas as vantagens que esta oferece para o programa de exercícios direcionado para a terceira idade.

  9. Mechanisms and regulation of Na(+) uptake by freshwater fish.

    Science.gov (United States)

    Kumai, Yusuke; Perry, Steve F

    2012-12-01

    Mechanisms of ion uptake by freshwater (FW) fish have received considerable attention over the past 80 years. Through an assortment of techniques incorporating whole animal physiology, electrophysiology and molecular biological approaches, three models have been proposed to account for Na(+) uptake. (1) Direct exchange of Na(+) and H(+) via one or more types of Na(+)/H(+) exchanger (slc9), (2) uptake of Na(+) through epithelial Na(+) channels energized by an electrical gradient created by H(+)-ATPase and (3) Na(+)/Cl(-) co-transport (slc12). While each mechanism is supported at least in part by theoretical or experimental data, there are several outstanding questions that have not yet been fully resolved. Furthermore, there are few details concerning how these Na(+) uptake mechanisms are fine tuned in response to the fluctuating FW environments. In this review, we summarize the current understanding of these three Na(+) uptake mechanisms and discuss their regulation by endocrine (cortisol and prolactin) and neurohumoral (catecholamines) factors.

  10. Transport of Na48 Drift Chambers to Dubna

    CERN Multimedia

    GOLOVATYUK, V

    2010-01-01

    On 22 July, in the occasion of the departure of the Na48 Drift Chambers from CERN, Mikhail Itkis (acting Director of the JIINR) and Rolf Heuer (CERN Director General) visited the NA62 experimental area.

  11. HUME E O EMPIRISMO NA MORAL

    Directory of Open Access Journals (Sweden)

    Adriano Naves de Brito

    2007-12-01

    Full Text Available O que pretendo defender neste texto é que uma posição empirista na moral é compatível com uma pretensão de validade intersubjetiva de juízos morais. Essa pretensão deve, nesse caso, estar calcada na naturalização dos fundamentos da moralidade, mas tem de conviver com limites acerca da justificação de enunciados de valor. Para defender esse ponto, sirvo-me da filosofia moral de Hume, como ele a expôs no seu texto Uma investigação sobre os princípios da moral. No que diz respeito à filosofia de Hume, o objetivo deste texto é explicitar o caráter empírico seja de seu método de investigação da moral, seja do princípio que para ela ele encontra.

  12. Fundamental symmetries in {sup 21}Na decay

    Energy Technology Data Exchange (ETDEWEB)

    Hoek, D.J. van der; Hoekstra, R.; Jungmann, K.; Kruithof, W.L.; Onderwater, C.J.G.; Sohani, M.; Willmann, L.; Wilschut, H.W. [KVI, University of Groningen, Groningen (Netherlands)

    2009-07-01

    The {beta}-{nu} correlations in {beta}-decay allows searching for contributions that go beyond the V-A description of the Standard Model for the electroweak interaction. We are developing an experimental setup to measure correlations in the {beta}-decay of {sup 21}Na. By trapping the radioactive atoms, the recoiling nucleus (kinetic energy <230 eV) can be measured in a reaction microscope in coincidence with the emitted {beta} particle. The first step is to study {beta}-{nu} correlations that allows to set limits on scalar and tensor contributions. By polarizing the parent nucleus it becomes possible to search for time reversal violation. The production and trapping of {sup 21}Na has been accomplished. Details of the setup with a two laser system and the status of this phase of the program are described.

  13. NA62 experiment at CERN SPS

    Directory of Open Access Journals (Sweden)

    Kozhuharov Venelin

    2014-01-01

    Full Text Available The NA62 experiment at SPS is a continuation of the long standing CERN kaon physics program. The high statistics and the unprecedent precision allow to probe the Standard Model and test the description of the strong interactions at low energy. The final results on the the lepton universality test by measuring the ratio RK = Γ(K+ → e+ν/Γ(K+ → µ+ν and the study of the K± → π±γγ decay are presented. The major goal of the NA62 experiment is to perform a measurement of the Br(K+ → π+νν̄ with a precision of 10% in two years of data taking. The detector setup together with the analysis technique is described.

  14. Recent results from NA61/SHINE

    CERN Document Server

    Andronov, Evgeny

    2016-01-01

    The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For these goals a scan of the two dimensional phase diagram (T-$\\mu_B$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. In this contribution intriguing results on the energy dependence of hadron spectra and yields in inelastic p+p and centrality selected Be+Be collisions will be presented. In particular, the energy dependence of the signals of deconfinement, the 'horn', 'step' and 'kink', in p+p interactions will be presented and compared with the corresponding results from central Pb+Pb collisions from NA49.

  15. The NA60 experiment readout architecture

    CERN Document Server

    Floris, M; Usai, G L; David, A; Rosinsky, P; Ohnishi, H

    2004-01-01

    The NA60 experiment was designed to identify signatures of a new state of matter, the Quark Gluon Plasma, in heavy-ion collisions at the CERN Super Proton Synchroton. The apparatus is composed of four main detectors: a muon spectrometer (MS), a zero degree calorimeter (ZDC), a silicon vertex telescope (VT), and a silicon microstrip beam tracker (BT). The readout of the whole experiment is based on a PCI architecture. The basic unit is a general purpose PCI card, interfaced to the different subdetectors via custom mezzanine cards. This allowed us to successfully implement several completely different readout protocols (from the VME like protocol of the MS to the custom protocol of the pixel telescope). The system was fully tested with proton and ion beams, and several million events were collected in 2002 and 2003. This paper presents the readout architecture of NA60, with particular emphasis on the PCI layer common to all the subdetectors. (16 refs).

  16. O Personal Trainer na Perspectiva do Marketing

    Directory of Open Access Journals (Sweden)

    Cibele Biehl Bossle

    2011-03-01

    Full Text Available Esse estudo apresenta mapeamento das referências dedicadas à formação do personal trainer em bases de dados eletrônicas. Essa garimpagem revelou baixa produção científica sobre o assunto e mostrou que na literatura sobre personal trainer predominam livros com linguagem corrente no mundo dos negócios. Esses achados nos levaram a indagar sobre a força do discurso físico-empresarial, especialmente o marketing, na constituição desta ocupação profissional. Jeremy Rifkin, Zygmunt Bauman, Paula Sibilia e Denise Sant'Anna permitiram visualizar que o marketing dirigido ao personal trainer tem como tarefa reinventar, ressignificar e "repaginar" esta modalidade de serviço em nome da sobrevivência no disputado mercado da vida ativa.

  17. Fotografia na rynku aukcyjnym w Polsce

    Directory of Open Access Journals (Sweden)

    Bednarek, Anna

    2012-09-01

    Full Text Available W artykule podjęta została analiza stanu aukcyjnego rynku fotografii w Polsce w oparciu o wyniki sprzedaży z okresu od pierwszej aukcji fotografii (1996 do końca 2011 roku. Dane te pozwalają czytelnikowi na zapoznanie się z rozmiarami tego rynku (obrót, liczba sprzedanych obiektów, charakterystyką nabywanych obiektów (rekordy cenowe, średnie ceny, popularni twórcy i okresy oraz z trudnościami, które można napotkać podczas badania tego zjawiska. W podsumowaniu znalazły się przewidywania dotyczące dalszego rozwoju rynku.

  18. Luzes portuguesas na caverna do patriarcado brasileiro

    Directory of Open Access Journals (Sweden)

    Constância Lima Duarte

    2013-09-01

    Full Text Available Novas cartas portuguesas revelou literariamente as diversas formas de opressão a que as mulheres estavam submetidas através dos séculos, pela distorcida mística imposta pelo patriarcalismo – verdadeira caverna que cerceava o pensamento das mulheres e seu lugar na sociedade. A publicação do livro das três marias contribuiu para a formação de um senso crítico, ampliou a consciência feminista, e propiciou o surgimento de uma literatura engajada também entre nós. O texto pretende refletir sobre a repercussão da publicação da obra na mídia impressa e entre as feministas brasileiras.

  19. The two C-terminal tyrosines stabilize occluded Na/K pump conformations containing Na or K ions.

    Science.gov (United States)

    Vedovato, Natascia; Gadsby, David C

    2010-07-01

    Interactions of the three transported Na ions with the Na/K pump remain incompletely understood. Na/K pump crystal structures show that the extended C terminus of the Na,K-adenosine triphosphatase (ATPase) alpha subunit directly contacts transmembrane helices. Deletion of the last five residues (KETYY in almost all Na/K pumps) markedly lowered the apparent affinity for Na activation of pump phosphorylation from ATP, a reflection of cytoplasmic Na affinity for forming the occluded E1P(Na3) conformation. ATPase assays further suggested that C-terminal truncations also interfere with low affinity Na interactions, which are attributable to extracellular effects. Because extracellular Na ions traverse part of the membrane's electric field to reach their binding sites in the Na/K pump, their movements generate currents that can be monitored with high resolution. We report here electrical measurements to examine how Na/K pump interactions with extracellular Na ions are influenced by C-terminal truncations. We deleted the last two (YY) or five (KESYY) residues in Xenopus laevis alpha1 Na/K pumps made ouabain resistant by either of two kinds of point mutations and measured their currents as 10-mM ouabain-sensitive currents in Xenopus oocytes after silencing endogenous Xenopus Na/K pumps with 1 microM ouabain. We found the low affinity inhibitory influence of extracellular Na on outward Na/K pump current at negative voltages to be impaired in all of the C-terminally truncated pumps. Correspondingly, voltage jump-induced transient charge movements that reflect pump interactions with extracellular Na ions were strongly shifted to more negative potentials; this signals a several-fold reduction of the apparent affinity for extracellular Na in the truncated pumps. Parallel lowering of Na affinity on both sides of the membrane argues that the C-terminal contacts provide important stabilization of the occluded E1P(Na3) conformation, regardless of the route of Na ion entry into the

  20. Posso ser eu mesmo na escola?

    Directory of Open Access Journals (Sweden)

    Wilton Orlando Trapp

    2012-04-01

    Full Text Available Este texto faz uma reflexão acerca da importância de se pensar a escola como um lugar da convivência humana e do respeito à cultura do brincar/jogar, trazendo contribuições à superação da influência mercadológica presente nas práticas de movimento e na forma de planejar o uso do espaço escolar.

  1. Acetylene diffusion in Na-Y zeolite

    Indian Academy of Sciences (India)

    S Mitra; S Sumitra; A M Umarji; R Mukhopadhyay; S Yashonath; S L Chaplot

    2004-08-01

    Study of diffusivity of acetylene adsorbed in Na-Y zeolite by quasi-elastic neutron scattering (QENS) measurements at temperatures of 300, 325 and 350 K is reported. A model in which the acetylene molecules undergo random-walk diffusion characterized by a Gaussian distribution of jump lengths inside zeolite cages describes the data consistently. The diffusion constant, residence time between jumps and root mean square jump length are determined.

  2. Prototype calorimeters for the NA3 experiment

    CERN Multimedia

    1975-01-01

    The NA3 Experiment was set-up on the North Area of the SPS by the CERN/ Ecole Polytechnique/College de France/ Orsay/Saclay Collaboration, to study high transverse momentum leptons and hadrons from hadron collisions. The calorimeters measured the energy of hadrons (prototype on the right) and leptons (prototype on the left). They used a new type of plastic scintillator (plexipop). (see CERN Courier of November 1975) energy (prototype on the right)

  3. SPLETNA TRGOVINA NA PRIMERU PORTALA EBAY

    OpenAIRE

    Babić, Aleksandra

    2012-01-01

    Prilagajanje spremembam v poslovnem okolju je temeljnega pomena za obstoj slehernega podjetja. Sodobno trženje postaja temeljna filozofija vseh sodobnih, tržno usmerjenih podjetij. Z elektronskim poslovanjem so podjetja s pomočjo računalnikov in informatizacije procesov posodobila del ali celotno poslovanje, kot na primer komunikacijo z dobavitelji in odjemalci, skladiščenje, distribucijo, trženje, prodajo in podobno. Vendar je elektronska trgovina le del elektronskega poslovanja podjetja. ...

  4. Clubes carnavalescos negros na cidade de Pelotas

    Directory of Open Access Journals (Sweden)

    Loner, Beatriz Ana

    2009-01-01

    Full Text Available O artigo trata da organização negra na cidade de Pelotas, particularmente com relação aos seus clubes carnavalescos, que tiveram seu auge entre os anos de 1920 e 1950. Pretende-se descrever os principais clubes e sua evolução, analisando seu papel e sua importância para a comunidade negra pelotense

  5. NA35: sulphur-gold collision

    CERN Multimedia

    1991-01-01

    In this image the real particles produced by the collision of a 6400 GeV sulphur ion with a gold target can be seen as they pass through a streamer chamber. Streamer chambers consist of a gas chamber through which a strong pulsed electric field is passed, creating sparks as a charged particle passes through it. The NA35 experiment, which was in operation in the 1980s, was part of CERN's ongoing heavy ion project.

  6. UPORABA KODE QR NA MOBILNIH NAPRAVAH

    OpenAIRE

    Taciga, Matej

    2013-01-01

    V diplomski nalogi je opisan je razvoj aplikacije za mobilno napravo na platformi Windows Phone, ki omogoča branje QR kode. Aplikacijo smo razvili v programskem jeziku C#. Zajete in opisane so možnosti uporabe QR kode. Opisano je testiranje obstoječih aplikacij s QR čitalci. Predstavljena sta tudi razvoj in struktura QR kode. S primerom je razloženo kako so podatki zakodirani v kodo.

  7. The NA62 experiment at CERN

    Science.gov (United States)

    Venditti, Stefano

    2016-12-01

    The goal of the NA62 experiment at CERN is to collect O(100) events of the ultrarare K+→ π +ν bar {ν } decay in two years. After a long R&D phase and a successful pilot run in 2014, the first data-taking phase took place in 2015. In this paper the importance of the experiment's physics goal, as well as the experimental solutions adopted in order to attain it, will be reviewed.

  8. Afasia adquirida na infância

    Directory of Open Access Journals (Sweden)

    Eliana C. Wanderley

    1969-06-01

    Full Text Available São relatados dois casos de afasia em menina de 10 anos e menino de 8 anos, conseqüentes a lesão cerebral por projétil de arma de fogo no primeiro caso e septicemia com tromboflebite no segundo. Nos dois casos a evolução foi bastante favorável e ambos os pacientes apresentaram percepção praticamente normal com distúrbios na expressão oral que assumia várias vezes o tipo de lapso amnéstico. A expressão gráfica nos dois casos foi mais atingida como sonseqüência de estar menos automatizada. O fenômeno da perseveração foi notado na fala no primeiro caso e, na escrita, no seguno. Foi discutida a justificativa do diagnóstico e lembrado o diagnóstico diferencial com outros distúrbios da fala em crianças.

  9. Imunossupressores na Dermatologia Immunosuppressive agents in Dermatology

    Directory of Open Access Journals (Sweden)

    Aline Lopes Bressan

    2010-02-01

    Full Text Available Os imunossupressores são drogas que agem na divisão celular e têm propriedades anti-inflamatórias. Sendo assim, são essencialmente prescritos na prevenção de rejeição de transplantes e no tratamento das doenças autoimunes e inflamatórias crônicas, que, na Dermatologia, têm a psoríase como maior representante. Nesta sessão serão descritas as principais drogas imunossupressoras, com orientações para seu manejo adequado.Immunosupressants are drugs that act in cell division and have anti-inflammatory effects. Therefore, they are essentially prescribed in the prevention of transplant rejection and in the treatment of autoimmune disorders and chronic inflammatory diseases, whose main example in Dermatology is psoriasis. In this work the most important immunosuppressive drugs and orientation to properly administer them are going to be described.

  10. Resonances production from the NA60 experiment

    Directory of Open Access Journals (Sweden)

    De Falco A.

    2012-11-01

    Full Text Available The NA60 experiment at the CERN SPS has studied light vector meson production in In-In collisions at 158A GeV. The ϕ meson was detected via both the K+K− and the μ+μ− decay channels. The yields and inverse slope parameters of the mT spectra observed in the two channels are compatible within errors, different from the large discrepancies seen in Pb-Pb collisions between the hadronic (NA49 and dimuon (NA50 decay channels. In the invariant mass region 0.2 1 GeV, the excess is found to be prompt, with remarkable differences with respect to the Drell-Yan process. The Teff slope parameter, extracted from the transverse mass spectra, shows a rise with mass up to the ρ, followed by a sudden decline for higher masses. The former is consistent with radial flow of a hadronic source, while the latter suggests a dominantly partonic emission source.

  11. Envolvimento do sistema nervoso central na cisticercose

    Directory of Open Access Journals (Sweden)

    Aristides Cheto de Queiroz

    1979-03-01

    Full Text Available No estudo do envolvimento do SNC na cisticercose, verificou-se uma freqüência de 0,3%, sempre como achado incidental no estudo de rotina de autópsias; apenas um caso mostrou boa correlação com a presença de manifestações neurológicas. Esta freqüência que é baixa em relação ao que é observado em outras regiões do Brasil, mostra que a neurocisticercose não representa um grande problema na região. As reações do hospedeiro ao embrião do cisticerco foram sempre do tipo inflamatório crônico e fibrosante. Neste estudo ficou demonstrada a importância do método de impregnação pela prata (Grocott na identificação do esqueleto do cisticerco no interior de lesões fibrosantes e/ou calcificadas.

  12. Hadron production measurement from NA61/SHINE

    CERN Document Server

    Korzenev, A

    2013-01-01

    New results from the NA61/SHINE experiment on the determination of charged hadron yields in proton-carbon interactions are presented. They aim to improve predictions of the neutrino flux in the T2K experiment. The analysis is based on the main dataset collected by NA61/SHINE in the year 2009. The data were recorded using a secondary-proton beam of 31 GeV/$c$ momentum from CERN SPS which impinges on a graphite target. To determine the inclusive production cross section for charged pions, kaons and protons a thin target was exploited. Results of this measurement are used in the T2K beam simulation program to reweight hadron yields at the interaction vertex. At the same time, NA61/SHINE results obtained with the T2K replica target allow to constrain hadron yields at the surface of the target. This allows to constrain up to 90% of the neutrino flux, thus reducing significantly the model dependence of the neutrino beam prediction. All measured spectra are compared to predictions of hadron production models.

  13. Transplante pulmonar na infância

    Directory of Open Access Journals (Sweden)

    Camargo José J.

    2002-01-01

    Full Text Available Objetivos: este artigo faz uma revisão dos principais aspectos relacionados com o transplante pulmonar na população pediátrica, e traz a experiência da equipe pioneira na realização do procedimento na América Latina. Fontes de dados: foram utilizadas informações através de revisão bibliográfica, realizada por busca direta de artigos científicos e por pesquisa nas bases de dados Medline e Lilacs. Síntese dos dados: o artigo é estruturado em tópicos, nos quais procura identificar as semelhanças e as diferenças com o transplante pulmonar do adulto. Discute os problemas específicos da criança transplantada e enfatiza uma situação específica, a do transplante pulmonar com doadores vivos aparentados. Conclusões: os avanços observados no transplante pulmonar realizado em adultos, para tratamento de doenças pulmonares, parenquimatosas ou vasculares, têm sido transferidos, nos últimos anos, para a população pediátrica, com sucesso crescente.

  14. Explosive phenomena in heavily irradiated NaCl

    NARCIS (Netherlands)

    denHartog, HW; Vainshtein, DI; Matthews, GE; Williams, RT

    1997-01-01

    In heavily irradiated NaCl crystals explosive phenomena can be initiated during irradiation or afterwards when samples are heated to temperatures between 100 and 250 degrees C. During irradiation of NaCl Na and Cl-2 precipitates and void structures are produced along with the accumulation of stored

  15. Spontaneous NA+ transients in individual mitochondria of intact astrocytes.

    Science.gov (United States)

    Azarias, Guillaume; Van de Ville, Dimitri; Unser, Michael; Chatton, Jean-Yves

    2008-02-01

    Mitochondria in intact cells maintain low Na(+) levels despite the large electrochemical gradient favoring cation influx into the matrix. In addition, they display individual spontaneous transient depolarizations. The authors report here that individual mitochondria in living astrocytes exhibit spontaneous increases in their Na(+) concentration (Na(mit)(+) spiking), as measured using the mitochondrial probe CoroNa Red. In a field of view with approximately 30 astrocytes, up to 1,400 transients per minute were typically detected under resting conditions. Na(mit)(+) spiking was also observed in neurons, but was scarce in two nonneural cell types tested. Astrocytic Na(mit)(+) spikes averaged 12.2 +/- 0.8 s in duration and 35.5 +/- 3.2 mM in amplitude and coincided with brief mitochondrial depolarizations; they were impaired by mitochondrial depolarization and ruthenium red pointing to the involvement of a cation uniporter. Na(mit)(+) spiking activity was significantly inhibited by mitochondrial Na(+)/H(+) exchanger inhibition and sensitive to cellular pH and Na(+) concentration. Ca(2+) played a permissive role on Na(mit)(+) spiking activity. Finally, the authors present evidence suggesting that Na(mit)(+) spiking frequency was correlated with cellular ATP levels. This study shows that, under physiological conditions, individual mitochondria in living astrocytes exhibit fast Na(+) exchange across their inner membrane, which reveals a new form of highly dynamic and localized functional regulation.

  16. Regulation of paracellular Na+ and Cl(-) conductances by hydrostatic pressure.

    Science.gov (United States)

    Tokuda, Shinsaku; Niisato, Naomi; Nagai, Toshiki; Taruno, Akiyuki; Nakajima, Ken-Ichi; Miyazaki, Hiroaki; Yamada, Toshiki; Hosogi, Shigekuni; Ohta, Mariko; Nishio, Kyosuke; Iwasaki, Yoshinobu; Marunaka, Yoshinori

    2009-09-01

    The effect of hydrostatic pressure on the paracellular ion conductance (Gp) composed of the Na(+) conductance (G(Na)) and the Cl(-) conductance (G(Cl)) has been Investigated. Gp, G(Na) and G(Cl) were time-dependently increased after applying an osmotic gradient generated by NaCl with basolateral hypotonicity. Hydrostatic pressure (1-4cm H2O) applied from the basolateral side enhanced the osmotic gradient-induced increase in Gp, G(Na) and G(Cl) in a magnitude-dependent manner, while the hydrostatic pressure applied from the apical side diminished the osmotic gradient-induced increase in Gp, G(Na) and G(Cl). How the hydrostatic pressure influences Gp, G(Na) and G(Cl) under an isosmotic condition was also investigated. Gp, G(Na) and G(Cl) were stably constant under a condition with basolateral application of sucrose canceling the NaCl-generated osmotic gradient (an isotonic condition). Even under this stable condition, the basolaterally applied hydrostatic pressure drastically elevated Gp, G(Na) and G(Cl), while apically applied hydrostatic pressure had little effect on Gp, G(Na) or G(Cl). Taken together, these observations suggest that certain factors controlled by the basolateral osmolality and the basolaterally applied hydrostatic pressure mainly regulate the Gp, G(Na) and G(Cl).

  17. Stress of Cl- is Stronger than That of Na+ on Glycine max Seedlings Under NaCl Stress

    Institute of Scientific and Technical Information of China (English)

    LUO Qing-yun; YU Bing-jun; LIU You-liang

    2002-01-01

    Seedlings of six Glycine max cultivars were used to compare Cl- with Na+ in stress effects onsoybean seedlings under NaCl stress. Results showed that stress of NaCl on G. max seedlings was mainlycaused by Cl- and not by Na+. After treatment with isoosmotic solutions of Cl- (without Na+ ) and Na+ (with-out Cl-) respectively, fresh weight and height of G. max seedlings growing in solution of Cl- were much morestressed than those in solution of Na+. And the roots and leaves electrolyte leakage were much more increasedunder stress of Cl- than those under stress of Na+. Salt tolerance of G. max seedlings was mainly contributedto Cl- withheld in roots of seedlings to decrease its content in leaves.

  18. Reflectivity of NaK Droplets

    Science.gov (United States)

    Wiedemann, C.; Oswald, M.; Stabroth, S.; Klinkrad, H.; Vörsmann, P.

    An important contribution to the space debris population near 900 km orbital altitude are the NaK droplets. Sixteen nuclear powered satellites of the type RORSAT launched between 1980 and 1988 activated a reactor core ejection system close to this altitude. The core ejection causes an opening of the primary coolant circuit. The liquid coolant has been released into space during these core ejections, forming droplets up to a diameter of 5.5 cm. These droplets consist of an alloy of two alkali metals, sodium and potassium (NaK). In this paper the monochromatic and the total reflectivity of NaK is calculated using theoretical models. The reflectivity depends on the alloy composition and temperature of a droplet. The alloy composition may change due to evaporation, resulting in an enrichment of sodium especially at the droplet surface. According to the literature, there is only a limited number of available measurement data concerning the optical properties of NaK alloys. Furthermore the published data for pure sodium and potassium are controversial. Thus it is necessary to investigate the optical properties of alkali metals and their alloys. Mainly two types of optical absorption, the intraband and the interband absorption, are considered. The intraband absorption is calculated using the Drude-model which uses electrical properties to derive the optical constants of pure metals or alloys. Drude assumes that the valence electrons can be treated as free electrons. The electrons behave like an ideal gas of uncharged particles. The theory of free electrons is a very simple model for the description of the valence electrons in metals. This assumption is sufficient for alkali metals, because they show a nearly free electron behavior. For the interband absorption the classical Butcher-model is used. Furthermore an absorption anomaly which has been observed in some alkali metals is discussed. Especially for potassium, some measurements revealed an unexpected absorption in the

  19. Route, mechanism, and implications of proton import during Na+/K+ exchange by native Na+/K+-ATPase pumps.

    Science.gov (United States)

    Vedovato, Natascia; Gadsby, David C

    2014-04-01

    A single Na(+)/K(+)-ATPase pumps three Na(+) outwards and two K(+) inwards by alternately exposing ion-binding sites to opposite sides of the membrane in a conformational sequence coupled to pump autophosphorylation from ATP and auto-dephosphorylation. The larger flow of Na(+) than K(+) generates outward current across the cell membrane. Less well understood is the ability of Na(+)/K(+) pumps to generate an inward current of protons. Originally noted in pumps deprived of external K(+) and Na(+) ions, as inward current at negative membrane potentials that becomes amplified when external pH is lowered, this proton current is generally viewed as an artifact of those unnatural conditions. We demonstrate here that this inward current also flows at physiological K(+) and Na(+) concentrations. We show that protons exploit ready reversibility of conformational changes associated with extracellular Na(+) release from phosphorylated Na(+)/K(+) pumps. Reversal of a subset of these transitions allows an extracellular proton to bind an acidic side chain and to be subsequently released to the cytoplasm. This back-step of phosphorylated Na(+)/K(+) pumps that enables proton import is not required for completion of the 3 Na(+)/2 K(+) transport cycle. However, the back-step occurs readily during Na(+)/K(+) transport when external K(+) ion binding and occlusion are delayed, and it occurs more frequently when lowered extracellular pH raises the probability of protonation of the externally accessible carboxylate side chain. The proton route passes through the Na(+)-selective binding site III and is distinct from the principal pathway traversed by the majority of transported Na(+) and K(+) ions that passes through binding site II. The inferred occurrence of Na(+)/K(+) exchange and H(+) import during the same conformational cycle of a single molecule identifies the Na(+)/K(+) pump as a hybrid transporter. Whether Na(+)/K(+) pump-mediated proton inflow may have any physiological or

  20. The relation between aging, aortic NaF avidity and coronary artery NaF avidity: A NaF PET CT study

    DEFF Research Database (Denmark)

    Blomberg, Björn; Thomassen, Anders; Hildebrandt, Malene;

    2013-01-01

    volunteers without traditional cardiovascular risk factors were prospectively assessed by Sodium 18-Fluoride (Na-18F) PET CT imaging. Global aortic uptake of Na-18F was determined by calculating the average aortic blood pool subtracted maximum standardized uptake value (cSUV) [maximum SUVaorta - mean...... SUVblood pool]. Global uptake of Na-18F in the coronary arteries was determined by calculating the average heart blood pool subtracted maximum SUV [maximum SUVheart - mean SUVblood pool]. Calculating regression and correlation coefficients summarized the data. Results: A strong linear relationship...... was observed between aortic and coronary artery Na-18F avidity (Pearson’s r = 0.83 [95% CI; 0.49, 0.95]; t statistic = 4.71; P = 0.0008). A quadratic relationship was observed between aging and aortic Na-18F avidity. Also, a quadratic relationship was observed between aging and coronary artery Na-18F uptake...

  1. Na+ channel function, regulation, structure, trafficking and sequestration

    Science.gov (United States)

    Chen-Izu, Ye; Shaw, Robin M; Pitt, Geoffrey S; Yarov-Yarovoy, Vladimir; Sack, Jon T; Abriel, Hugues; Aldrich, Richard W; Belardinelli, Luiz; Cannell, Mark B; Catterall, William A; Chazin, Walter J; Chiamvimonvat, Nipavan; Deschenes, Isabelle; Grandi, Eleonora; Hund, Thomas J; Izu, Leighton T; Maier, Lars S; Maltsev, Victor A; Marionneau, Celine; Mohler, Peter J; Rajamani, Sridharan; Rasmusson, Randall L; Sobie, Eric A; Clancy, Colleen E; Bers, Donald M

    2015-01-01

    This paper is the second of a series of three reviews published in this issue resulting from the University of California Davis Cardiovascular Symposium 2014: Systems approach to understanding cardiac excitation–contraction coupling and arrhythmias: Na+ channel and Na+ transport. The goal of the symposium was to bring together experts in the field to discuss points of consensus and controversy on the topic of sodium in the heart. The present review focuses on Na+ channel function and regulation, Na+ channel structure and function, and Na+ channel trafficking, sequestration and complexing. PMID:25772290

  2. VPLIV NADZORA ZAPOSLENIH NA NJIHOVO VEDENJE IN MOTIVACIJO PRI DELU

    OpenAIRE

    Marinšek, Teja

    2011-01-01

    Nadzor na delovnem mestu je sodoben problem, v katerem smo udeleženi vsi. Z vedno manjšim zaupanjem med nadrejenimi in podrejenimi se nadzor poostruje in s tem se tudi pritiski na delovnem mestu povečujejo. V diplomskem delu smo raziskovali predvsem vpliv nadzora na vedenje človeka. Zanimalo nas je, kako tak pritisk vpliva na človeka in njegove spremembe v obnašanju. Ali nanj to vpliva pozitivno in motivacijsko ali deluje na človeka negativno. Obravnavali smo tudi zakone, ki opredeljujejo...

  3. NA48 experiment : view along the NA48 beamline with the detector in the distance.

    CERN Multimedia

    Hans Taureg

    1996-01-01

    Photo 02: Side view of the NA48 experiment showing the LKR calorimeter cryostat No one is sure why the Universe wound up the way it has: all matter and no antimatter. According to prevailing theories, the early universe had equal amounts of matter and antimatter. To see what might be missing from the theories, physicists search for the rare cases in which matter and antimatter behave differently. One such imbalance, called direct CP violation, showed up in the NA 31 experiment at CERN. The results from this experiment, first presented in 1993, showed that when K mesons and their antimatter cousins decay, they show a slight preference for matter over antimatter. Later experiments with neutral K mesons, including NA48 at CERN and KTeV at Fermilab in the United States, showed direct CP violation is real.

  4. A coprecipitation technique to prepare NaNbO3 and NaTaO3

    Indian Academy of Sciences (India)

    V Samuel; A B Gaikwad; V Ravi

    2006-04-01

    A simple coprecipitation technique has been used successfully for the preparation of pure, ultrafine, single phases of NaNbO3 (NN) and NaTaO3 (NT). An alcoholic solution of ammonium carbonate and ammonium hydroxide was used to precipitate Na+ and Nb5+ (or Ta5+) cations under basic conditions as carbonate and hydroxide, respectively. On heating at 700°C, these precursors produce respective products. For comparison, both NN and NT powders were also prepared by the traditional solid state method. The phase purity and lattice parameters were studied by powder X-ray diffraction (XRD). The particle size and morphology were studied by scanning electron microscopy (SEM).

  5. Na,K-pump modulates intercellular communication in vascular wall

    DEFF Research Database (Denmark)

    Matchkov, Vladimir; Nilsson, Holger; Aalkjær, Christian

      Ouabain, a specific inhibitor of the Na,K-pump, has previously been shown to interfere with intercellular communication. Here we test the hypothesis that the communication between vascular smooth muscle cells (SMCs) is regulated through an interaction between the Na,K-pump and the Na,Ca-exchanger....... Immunohistochemical analysis suggested that a ouabain-sensitive α2 isoform of the Na,K-pump involved in this interaction. The experiments suggest that the Na,K-pump may affect gap junction conductivity via localized changes in intracellular calcium concentration through modulation of Na,Ca-exchanger activity....... were used as a model for electrical coupling of SMCs by measuring membrane capacitance (Cm). SMCs were uncoupled (evaluated by inhibition of vasomotion and desynchronization of calcium transients in vascular wall, or by reduction to half of Cm measured in paired A7r5 cells) when the Na,K-pump...

  6. Tecnologias na Web 2.0 : o empoderamento na educação aberta

    OpenAIRE

    Santarosa, Lucila Maria Costi; Conforto, Debora; Schneider, Fernanda Chagas

    2013-01-01

    Esse artigo problematiza a utilização de recursos educacionais abertos, na perspectiva da web 2.0, como tecnologias impulsionadoras de movimentos educativos formais e não formais. Por meio de experiências na formação de educadores em cursos de pós-graduação, discutimos o conceito de empoderamento e os princípios que estruturam a Educação Aberta, para referendar a importância de aproximar sujeitos em processo de formação de sistemas Web abertos instituindo e ampliando os tempos-espaços da apre...

  7. Dieta rica em proteína na redução do peso corporal

    OpenAIRE

    Pedrosa,Rogerio Graça; DONATO JUNIOR, Jose; Tirapegui, Julio

    2009-01-01

    A proporção ideal dos macronutrientes em dietas de emagrecimento é atualmente bastante discutida. Existem evidências de que dietas com maior proporção de proteína aumentam a perda de peso e de gordura corporal e diminuem a perda de massa corporal magra durante o emagrecimento. Todavia, os mecanismos responsáveis por estes efeitos não estão totalmente esclarecidos. Além disso, existem poucas conclusões a respeito dos possíveis efeitos colaterais dessas dietas na função renal e no estado nutric...

  8. NaI(Tl) response functions

    Energy Technology Data Exchange (ETDEWEB)

    Vega C, H. R.; Ortiz R, J. M. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas, Zac. (Mexico); Benites R, J. L. [Centro Estatal de Cancerologia de Nayarit, Calz. de la Cruz 118 Sur, Tepic, Nayarit (Mexico); De Leon M, H. A., E-mail: fermineutron@yahoo.com.mx [Instituto Tecnologico de Aguascalientes, Av. Adolfo Lopez Mateos 1801 Ote., 20155 Aguascalientes, Ags. (Mexico)

    2015-09-15

    The response functions of a NaI(Tl) detector have been estimated using Monte Carlo methods. Response functions were calculated for monoenergetic photon sources (0.05 to 3 MeV). Responses were calculated for point-like sources and for sources distributed in Portland cement cylinders. The responses were used to calculate the efficiency functions in term of photon energy. Commonly, sources used for calibration are point-like, and eventually sources to be measured have different features. In order to use the calibrated sources corrections due to solid angle, self-absorption and scattering, must be carried out. However, some of these corrections are not easy to perform. In this work, the calculated responses were used to estimate the detector efficiency of point-like sources, and sources distributed in Portland type cement. Samples of Portland paste were prepared and were exposed to photoneutrons produced by a 15 MV linac. Some of the elements in the cement were activated producing γ-emitting radionuclides that were measured with a NaI(Tl) gamma-ray spectrometer, that was calibrated with point-like sources. In order to determine the specific activity in the induced radioisotopes calculated efficiencies were used to make corrections due to the differences between the solid angle, photon absorption and photon scattering in the point-like calibration sources and the sources distributed in cement. During the interaction between photoneutrons and the cement samples three radioisotopes were induced: {sup 56}Mn, {sup 24}Na, and {sup 28}Al. (Author)

  9. Reinterpretacija na krilatata zmija (drakon v hristijanskata tradicija: Po povod ukrasata na Divoševoto evangelie

    Directory of Open Access Journals (Sweden)

    Džurova Aksinija

    2009-01-01

    Full Text Available (bugarski V statijata se razgležda edin ot motivite v ukrasata na Divoševoto evangelie ot XIV v. - tozi na krilatija drakon (na mesta s kozja glava i podobnata na nego ukrasa v sr'bski, gr'cki i ruski r'kopisi, povlijani v svojata dekoracija ot romanskoto izkustvo, koeto ot svoja strana interpretira rannohristijanski motivi, vlezli v r'kopisnija repertoar na gr'ckite kodeksi ošče prez X-XI v. i otnovo pojavili se v k'snovizantijskata tradicija.

  10. SMIČNA STABILNOST MOTORNIH ULJA

    OpenAIRE

    Cerny, Jaroslav; Vaclavickova, Ivana

    2006-01-01

    Sažetak U radu se sažimaju utjecaji na viskoznost motornoga ulja, poput smične stabilnosti modifikatora viskoznosti, udjela goriva i/ili čađe te degradacije ulja izazvane toplinskom oksidacijom. Značaj pojedinačnih vidova praćen je za nekoliko motornih ulja različitih gradacija viskoznosti cestovnim radom vozila s benzinskim motorom, kao i onih s dizelovim motorima. Trendovi promjene viskoznosti praćeni su i procjenjivani.

  11. The NA62 experiment at CERN

    Science.gov (United States)

    Piccini, Mauro

    2016-11-01

    The rare decays K → πvv¯ are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleanness. The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking for the decay K+ → π+vv¯, keeping the background at the level of 10%. Part of the experimental apparatus has been commissioned during a technical run in 2012. The diverse and innovative experimental techniques will be explained and some preliminary results obtained during the 2014 pilot run will be reviewed.

  12. Bullying e peer status na escola

    OpenAIRE

    Sequeira, Paulo Jorge Ferreira Pinto

    2009-01-01

    O presente trabalho propõe-se realizar, na sequência da Suficiência Investigadora que se debruçou genericamente sobre o tema do bullying (acoso escolar), uma análise exaustiva da associação entre a estrutura sócio-afectiva (peer status) em sala de aula e a incidência de bullying (acoso moral), em alunos do 4.º ano de escolaridade. Sustentar-se-á essa análise no marco teórico validado em sede de defesa da suficiência, devidamente actualizado e direccionado para a reflexão autora...

  13. DESENVOLVIMENTO MORAL E INDISCIPLINA NA ESCOLA

    Directory of Open Access Journals (Sweden)

    Rita Melissa Lepre

    2009-12-01

    Full Text Available O presente artigo configura-se como uma reflexão acerca da indisciplina e suas possíveis causas. Para debater sobre o assunto apresentamos a teoria do desenvolvimento moral de Jean Piaget e articulamos suas descobertas com a questão da indisciplina na escola. São feitas, ainda, reflexões sobre o ambiente em que nossas crianças encontram-se inseridas por, pelo menos, cinco horas diárias.

  14. MICOTOXINAS DO FUSARIUM spp NA AVICULTURA COMERCIAL

    OpenAIRE

    Santin, Elizabeth; Maiorka,Alex; Zanella,Irineo; Magon,Leandro

    2001-01-01

    Micotoxinas são metabólitos tóxicos produzidos por fungos, de natureza heterogênea e com variados princípios farmacológicos, que podem atuar sobre o organismo animal prejudicando o seu desempenho e desenvolvendo alterações patológicas graves. Nos últimos anos, as micotoxicoses têm recebido especial atenção devido às enormes perdas que vem causando na avicultura mundial. Fungos do gênero Fusarium são descritos como produtores de diversos tipos de toxinas. Assim sendo, as intoxicações causadas ...

  15. Cerenkov counter for the experiment NA3

    CERN Multimedia

    1978-01-01

    The program of the NA3 experiment included the study of hadronic interactions with a large transverse momentum pT, thus the inclusion in the set-up of three gas threshold Cerenkov counters of large acceptance. The photo shows the downstream part of the second Cerenkov (located at the output of the magnet). The yellow membrane is a temporary protection for the optics (shown in photo 7810540X) to be taken away when fixing this part to the gas tank (entering the magnet and not shown). The photomultipliers all around are heavily shielded.

  16. The NA62 Gigatracker pixel detector system

    Energy Technology Data Exchange (ETDEWEB)

    Mazza, G., E-mail: mazza@to.infn.i [INFN, sezione di Torino, 10125 Torino (Italy); Ceccucci, A. [CERN, CH-1211, Geneva 23 (Switzerland); Cortina, E. [UCL, Louvain la Neuve (Belgium); Cotta Ramusino, A. [INFN, sezione di Ferrara, 44100 Ferrara (Italy); Dellacasa, G. [INFN, sezione di Torino, 10125 Torino (Italy); Fiorini, M. [CERN, CH-1211, Geneva 23 (Switzerland); Garbolino, S. [INFN, sezione di Torino, 10125 Torino (Italy); Jarron, P.; Kaplon, J.; Kluge, A. [CERN, CH-1211, Geneva 23 (Switzerland); Marchetto, F. [INFN, sezione di Torino, 10125 Torino (Italy); Martin, E. [UCL, Louvain la Neuve (Belgium); Martoiu, S. [INFN, sezione di Torino, 10125 Torino (Italy); Noy, M. [CERN, CH-1211, Geneva 23 (Switzerland); Petrucci, F. [INFN, sezione di Ferrara, 44100 Ferrara (Italy); Riedler, P. [CERN, CH-1211, Geneva 23 (Switzerland); Rivetti, A. [INFN, sezione di Torino, 10125 Torino (Italy); Tiuraniemi, S. [CERN, CH-1211, Geneva 23 (Switzerland)

    2010-05-21

    The silicon tracker for the NA62 experiment has to provide both a time resolution of 150 ps rms and a space resolution of about 100{mu}mrms. These challenging specifications require the development of a new readout electronics in order to address the problem of measuring the tracks arrival time with such a high channel density. Moreover, the high particle density (up to 1.5MHz/mm{sup 2} in the center and 0.8-1 GHz in total) requires a high speed measurement and data transmission in order to keep the dead time below 1%.

  17. Ensino de geometria descritiva: inovando na metodologia

    Directory of Open Access Journals (Sweden)

    Regina Coeli Moraes Kopke

    2001-03-01

    Full Text Available Com base na observação, durante anos de magistério superior, na área de desenho, dos alunos de Engenharia, Matemática, Arquitetura e Artes, quanto às dificuldades encontradas por eles no aprendizado de desenho, em especial da Geometria Descritiva, é que nos propusemos, em 1999, lecionar essa disciplina para os cursos de Arquitetura e Artes, adotando uma metodologia diferente da convencional, para despertar, no aluno, o gosto pela disciplina e o desenvolvimento de uma habilidade pouco trabalhada na escola: a visão espacial. Mostrar para os alunos que essa disciplina não é difícil, mas apenas diferente daquilo que estudaram até então, tornou-se nossa meta. A visão espacial é uma habilidade mental localizada no lado direito do cérebro e, assim, quanto mais lúdica for esta aprendizagem, será mais bem assimilada. A proposta é iniciada no sentido de se trabalhar primeiro com sólidos: neles estarão os pontos, retas e planos normalmente abordados na metodologia convencional, nessa ordem. Como conclusão, tem-se que o importante é ressaltar o grande avanço que a Geometria Descritiva traz para quem quer representar graficamente qualquer coisa. Onde há planejamento, projeto e representação gráfica, aí estará a Geometria Descritiva.During many years observing the teaching of design at the Engineering, Mathematics, Architeture and Arts courses, we can note the difficulties of the students to learn it, specially the descriptive geometry. Because of that, we decided to teach this discipline to the Architeture and Arts courses, using a new metodology to make the students motivated to study and to learn, and trying to develop their their spatial vision. We want to show to the students that this discipline is not so difficult as they think, but show them that is only different. The spatial vision is a mental skill found at the right side of the brain and the more soft the learning is, the more it is assimilated by the brain. The

  18. Torcicolo adquirido na criança

    OpenAIRE

    Regala, Joana; Martins, Joana; Dias, Ana Isabel; Moreira, Ana; Neves, Manuel Cassiano

    2013-01-01

    O torcicolo adquirido na criança é uma manifestação clínica de múltiplas etiologias possíveis, que se podem agrupar em entidades musculoesqueléticas de origem traumática, infecciosa, inflamatória e tumoral, e entidades não musculo-esqueléticas de origem neurológica, oftalmológica, otorrinolaringológica,gastroenterológica e tumoral do sistema nervoso central. Assim existe um amplo espectro de gravidade,desde processos benignos e autolimitados tal como o torcicolo traumático até quadros graves ...

  19. DEPRESSÃO E ENVELHECIMENTO NA CONTEMPORANEIDADE

    Directory of Open Access Journals (Sweden)

    Delia Catullo Goldfarb

    2010-02-01

    Full Text Available RESUMO: O presente texto reproduz os trabalhos apresentados em mesa redonda sobre depressão e envelhecimento na contemporaneidade no III Congresso Ibero-americano de Psicogerontologia, realizado em novembro de 2010 em São Paulo. Estes trabalhos são resultado de reflexões precedentes em um grupo de estudos e de discussão de casos clínicos composto por psicanalistas. A depressão é uma figura psicopatológica de presença maciça nos dias de hoje. Na velhice o acúmulo de perdas e a aproximação da morte podem produzir um estado de tristeza, fundo depressivo que caracteriza um momento de recolhimento em que ocorrem os processos de luto. Em alguns sujeitos o que se verifica é a instalação de um episódio depressivo que indica a paralisação destes processos elaborativos e a progressão de um esvaziamento do sentido para a vida, restando, neste contexto, apenas a espera pela morte. Neste trabalho serão discutidos aspectos que concernem a vivência destas duas modalidades de enfrentamento da entrada na velhice, levando-se em conta as maneiras como a cultura pode favorecer a ocorrência destes percursos distintos do envelhecer, e como ela os aloja atualmente em um movimento de desconsideração da subjetividade: desanimo da velhice ou problema neuroquímico? Serão apresentadas hipóteses para a produção da depressão como psicopatologia no envelhecimento e reflexões sobre observações clínicas que derivam destes quadros clínicos, tais como: a crise da percepção da entrada na velhice, o corpo hipocondríaco, a paralisia do tempo, a vivência do desamparo. Palavras-chave: depressão, envelhecimento, cultura, corpo, tempo

  20. The NA62 experiment at CERN

    Directory of Open Access Journals (Sweden)

    Piccini Mauro

    2016-01-01

    Full Text Available The rare decays K → πvv̄ are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleanness. The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking for the decay K+ → π+vv̄, keeping the background at the level of 10%. Part of the experimental apparatus has been commissioned during a technical run in 2012. The diverse and innovative experimental techniques will be explained and some preliminary results obtained during the 2014 pilot run will be reviewed.

  1. Status of the NA62 Experiment

    Science.gov (United States)

    Palladino, Vito

    2016-04-01

    The rare decays {{{K}}^ + } to {π ^ + }{{ν bar ν }} are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleaness. The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking, keeping the background at the level of 10%. Part of the experimental apparatus has been commissioned during a technical run in 2012. The physics prospects and the status of the experiment will be reviewed after the commissioning run of 2014 and the data taking in 2015.

  2. VPLIV GLASOVNEGA ZAVEDANJA NA PISANJE IN BRANJE

    OpenAIRE

    Lahovnik, Janja

    2010-01-01

    Prvo triletje osnovne šole pokriva prvo fazo opismenjevanja, to je učenje branja in pisanja, ob tem pa razvijanje sposobnosti poslušanja in govorjenja. Prvi je proces dekodiranja besed oziroma vzpostavitev odnosa med črko in glasom. Najprej učenci spoznajo znake za črke in glasove, nato pa sledita branje in pisanje. Drugi proces zajema uporabo govornih sposobnosti, ki se kažejo na razumevanju prepoznanih besed. Obvladovanje abecednega zapisovanja zahteva sposobnosti zavedanja besed, zlogov in...

  3. Results on leptonic probes from NA50

    CERN Document Server

    Alessandro, B; Arnaldi, R; Atayan, M; Baglin, C; Baldit, A; Bedjidian, Marc; Beolè, S; Boldea, V; Bordalo, P; Borenstein, S R; Borges, G; Bussière, A; Capelli, L; Castanier, C; Castor, J I; Chaurand, B; Cheynis, B; Chiavassa, E; Cicalò, C; Claudino, T; Comets, M P; Constantinescu, S; Cortese, P; Cruz, J; De Falco, A; De Marco, N; Dellacasa, G; Devaux, A; Dita, S; Drapier, O; Espagnon, B; Fargeix, J; Force, P; Gallio, M; Gavrilov, Yu K; Gerschel, C; Giubellino, P; Golubeva, M B; Gonin, M; Grigorian, A A; Grigorian, S; Grossiord, J Y; Guber, F F; Guichard, A; Gulkanian, H R; Hakobyan, R S; Haroutunian, R; Idzik, M; Jouan, D; Karavitcheva, T L; Kluberg, L; Kurepin, A B; Le Bornec, Y; Lourenço, C; Macciotta, P; MacCormick, M; Marzari-Chiesa, A; Masera, M; Masoni, A; Monteno, M; Musso, A; Petiau, P; Piccotti, A; Pizzi, J R; Prado da Silva, W L; Prino, F; Puddu, G; Quintans, C; Ramello, L; Ramos, S; Rato-Mendes, P; Riccati, L; Romana, A; Santos, H; Saturnini, P; Scalas, E; Scomparin, E; Serci, S; Shahoyan, R; Sigaudo, F; Sitta, M; Sonderegger, P; Tarrago, X; Topilskaya, N S; Usai, G L; Vercellin, Ermanno; Villatte, L; Willis, N; Wu, T

    2003-01-01

    The NA50 Collaboration has performed a new measurement of the J/ psi yield in Pb-Pb collisions at 158 GeV/nucleon in improved experimental conditions. Our preliminary analysis of the year 2000 data sample, while confirming the onset of anomalous suppression and the non saturation of the J/ psi /Drell-Yan cross-section ratio, shows that peripheral Pb-Pb interactions follow the normal nuclear absorption pattern, which has in turn been established more precisely thanks to high statistics p-A data. (11 refs).

  4. Laparoscopia na abordagem inicial de tumores anexiais

    OpenAIRE

    2014-01-01

    OBJETIVO: Avaliar o uso da laparoscopia como método diagnóstico e terapêutico na abordagem inicial de tumores anexiais em população de risco para malignidade, bem como fatores clínicos associados à falha do método e conversão para laparotomia, e comparar taxas de complicação com pacientes cuja abordagem inicial se deu por laparotomia. MÉTODOS: Estudo prospectivo com 210 mulheres com exames de imagem prévios constando tumor an...

  5. As emoções na fala

    OpenAIRE

    Rodrigues, Américo Jorge Monteiro

    2007-01-01

    No presente trabalho analisamos algumas características acústicas (duração, frequência fundamental, F1 e F2) de um pequeno corpus de “voz emocional”, em Português Europeu, gravado por um actor. Procedemos também a testes de percepção desse corpus, a que se submeteu um grupo diversificado e o informante. Reflectimos também acerca do envolvimento emocional dos actores na construção de personagens, usando a voz. ABSTRACT: In the present work we analyse several acoustic charac...

  6. Sindromi prenaprezanja na potkoljenici i stopalu

    OpenAIRE

    Smerdelj, Miroslav; Madjarević, Mladen; OREMUŠ, KREŠIMIR

    2002-01-01

    U radu autori opisuju i objašnjavaju nastanak bolnih sindroma u području potkoljenice i stopala, vezanih uz profesiju odnosno sportsku aktivnost. Iznose se zapažanja i iskustva iz svakodnevne liječničke prakse, a i podaci iz novije medicinske literature. Značenje se daje liječenju koje je obično konzervativno, a od kirurških metoda naglasak se daje na nove manje invazivne metode. U radu su opisani najčešći sindromi prenaprezanja u području potkoljenice kao što su trkačka potkoljenica, sindrom...

  7. Ajustamento emocional e coping na compulsividade sexual

    OpenAIRE

    2012-01-01

    Nos últimos anos a comunidade científica tem prestado especial atenção às características do comportamento sexual compulsivo, bem como da sua etiologia e conceptualização, existindo ainda alguma controvérsia relativamente a estes quesitos. O presente estudo teve como objectivos analisar o papel do ajustamento emocional/psicopatologia na compulsividade sexual em jovens/estudantes universitários de ambos os sexos, assim como avaliar se a resposta sexual (desejo e excitação sex...

  8. Da mulher na Bíblia

    Directory of Open Access Journals (Sweden)

    Jacó Guinsburg

    2013-03-01

    Full Text Available Este artigo discute a figura e a representação da mulher na Bíblia. Elas são multidão no relato bíblico. Desde Eva, a cada página surge um vulto de mulher. Virtuoso ou pecador, desalmado ou abnegado, terno ou tirânico, ele suscita, hoje como outrora, a impressão viva de um temperamento, de um gesto, de um sentimento. O jogo sutil da psicologia e das motivações femininas, das suas relações com o mundo masculino, continua palpitando nas heroínas das Escrituras.

  9. Interactions between Na+ channels and Na+-HCO3- cotransporters in the freshwater fish gill MR cell: a model for transepithelial Na+ uptake.

    Science.gov (United States)

    Parks, Scott K; Tresguerres, Martin; Goss, Greg G

    2007-02-01

    Isolated mitochondria-rich (MR) cells from the rainbow trout gill epithelium were subjected to intracellular pH (pH(i)) imaging with the pH-sensitive dye BCECF-AM. MR cells were categorized into two distinct functional subtypes based on their ability to recover pH(i) from an NH(4)Cl-induced acidification in the absence of Na(+). An apparent link between resting pH(i) and Na(+)-independent pH(i) recovery was made. We observed a unique pH(i) acidification event that was induced by extracellular Na(+) addition. This further classified the mixed MR cell population into two functional subtypes: the majority of cells (77%) demonstrated the Na(+)-induced pH(i) acidification, whereas the minority (23%) demonstrated an alkalinization of pH(i) under the same circumstances. The focus of this study was placed on the Na(+)-induced acidification and pharmacological analysis via the use of amiloride and phenamil, which revealed that Na(+) uptake was responsible for the intracellular acidification. Further experiments revealed that pH(i) acidification could be abolished when Na(+) was allowed entry into the cell, but the activity of an electrogenic Na(+)-HCO(3)(-) cotransporter (NBC) was inhibited by DIDS. The electrogenic NBC activity was supported by a DIDS-sensitive, Na(+)-induced membrane potential depolarization as observed via imaging of the voltage-sensitive dye bis-oxonol. We also demonstrated NBC immunoreactivity via Western blotting and immunohistochemistry in gill tissue. We propose a model for transepithelial Na(+) uptake occurring via an apical Na(+) channel linked to a basolateral, electrogenic NBC in one subpopulation of MR cells.

  10. Novel regulation of cell [Na(+)] in macula densa cells: apical Na(+) recycling by H-K-ATPase.

    Science.gov (United States)

    Peti-Peterdi, János; Bebok, Zsuzsa; Lapointe, Jean-Yves; Bell, P Darwin

    2002-02-01

    Na-K-ATPase is the nearly ubiquitous enzyme that maintains low-Na(+), high-K(+) concentrations in cells by actively extruding Na(+) in exchange for K(+). The prevailing paradigm in polarized absorbing epithelial cells, including renal nephron segments and intestine, has been that Na-K-ATPase is restricted to the basolateral membrane domain, where it plays a prominent role in Na(+) absorption. We have found, however, that macula densa (MD) cells lack functionally and immunologically detectable amounts of Na-K-ATPase protein. In fact, these cells appear to regulate their cytosolic [Na(+)] via another member of the P-type ATPase family, the colonic form of H-K-ATPase, which is located at the apical membrane in these cells. We now report that this constitutively expressed apical MD colonic H-K-ATPase can function as a Na(H)-K-ATPase and regulate cytosolic [Na(+)] in a novel manner. This apical Na(+)-recycling mechanism may be important as part of the sensor function of MD cells and represents a new paradigm in cell [Na(+)] regulation.

  11. [Effects of NaCl stress on the seedling growth and K(+)- and Na(+) -allocation of four leguminous tree species].

    Science.gov (United States)

    Mo, Hai-Bo; Yin, Yun-Long; Lu, Zhi-Guo; Wei, Xiu-Jun; Xu, Jian-Hua

    2011-05-01

    Taking the pot-cultured seedlings of four leguminous tree species (Albizia julibrissin, Robinia pseudoacacia, Sophora japonica, and Gleditsia sinensis) as test materials, this paper studied their growth indices, critical salt concentration (C50), and K+ and Na+ allocation under different levels of NaCl stress, aimed to understand the difference of test tree species in salt tolerance. NaCl stress inhibited the seedling growth of the tree species. Under NaCl stress, the dry matter accumulation decreased, while the root/shoot ratio increased, especially for A. julibrissin and G. sinensis. Quadratic regression analysis showed that the C50 of A. julibrissin, R. pseudoacacia, S. japonica, and G. sinensis was 3.0 per thousand, 5.0 per thousand, 4.5 per thousand, and 3.9 per thousand, respectively, i.e., the salt tolerance of the four tree species was in the order of R. pseudoacacia > S. japonica > G. sinensis > A. julibrissin. In the root, stem, and leaf of the four tree species seedlings, the Na+ content increased with the increase of NaCl stress, while the K+ content (except in the root of A. julibrissin) decreased after an initial increase, resulting in a larger difference in the K+/Na+ ratio in the organs. Under the same NaCl stress, the allocation of Na+ in different organs of the four tree species seedlings decreased in the order of root>stem>leaf, while that of K+ differed with tree species and NaCl stress, and leaf was the main storage organ for K+. The K+/Na+ ratio in different organs decreased in the sequence of leaf>stem>root. R. pseudoacacia under NaCl stress accumulated more K+ and less Na+ in stem and leaf, and had higher K+/Na+ ratio in all organs and higher dry mass, being assessed to be more salt-tolerant. In contrast, A. julibrissin under high NaCl stress accumulated more Na+ in stem and leaf, and had a lower K+/Na+ ratio in all organs and lower dry mass, being evaluated to be lesser salt-tolerant. The K+ accumulation in seedling stem and leaf and the Na

  12. NaSrMn2F7, NaCaFe2F7, and NaSrFe2F7: novel single crystal pyrochlore antiferromagnets

    Science.gov (United States)

    Sanders, M. B.; Krizan, J. W.; Plumb, K. W.; McQueen, T. M.; Cava, R. J.

    2017-02-01

    The crystal structures and magnetic properties of three previously unreported A2B2F7 pyrochlore materials, NaSrMn2F7, NaCaFe2F7, and NaSrFe2F7 are presented. In these compounds, either S  =  2Fe2+ or S  =  5/2Mn2+ is on the B site, while nonmagnetic Na and Ca (Na and Sr) are disordered on the A site. The materials, which were grown as crystals via the floating zone method, display high effective magnetic moments and large Curie-Weiss thetas. Despite these characteristics, no ordering transition is detected. However, freezing of the magnetic spins, characterized by peaks in the susceptibility or specific heat, is observed at very low temperatures. The empirical frustration index, f  =  -θ CW/T f, for the materials are 36 (NaSrMn2F7), 27 (NaSrFe2F7), and 19 (NaCaFe2F7). AC susceptibility, DC susceptibility, and heat capacity measurements are used to characterize the observed spin glass behavior. The results suggest that the compounds are frustrated pyrochlore antiferromagnets with weak bond disorder. The magnetic phenomena that these fluoride pyrochlores exhibit, in addition to their availability as relatively large single crystals, make them promising candidates for the study of geometric magnetic frustration.

  13. A biotecnologia na agropecuária

    Directory of Open Access Journals (Sweden)

    João Lúcio de Azevedo

    1986-11-01

    Full Text Available This review reports the use of biotechnology in agriculture and animal husbandry. The main techniques and the most important products both in experimental stage or in commercial use are reported. The work intends to give a global vision to the theme, chronologically and spacely, showing the main lines of research and what has been obtained in this area. The techniques and products that are related to genetics and breeding are emphasized. Revisão Bibliográfica do emprego da biotecnologia na agropecuária, mostrando um levantamento das técnicas mais promissoras e de seus principais produtos, tanto em fase experimental como em uso comercial. Pretende-se dar uma visão global do assunto, cronológica e espacialmente, não se prendendo à detalhes, mostrando, em Unhas gerais, o que foi feito e o que se faz, atualmente, em biotecnologia. As técnicas e produtos que influenciam a área de genética e melhoramento genético na agropecuária, são enfatizadas.

  14. Autonomia e vulnerabilidade na vida dos adolescentes

    Directory of Open Access Journals (Sweden)

    Renata R. de Oliveira

    2007-05-01

    Full Text Available Este trabalho foi realizado com a finalidade de estabelecer relações entre os princípios éticos da autonomia e vulnerabilidade e a vida de adolescentes, pessoas reconhecidamente passíveis de síndromes depressivas, uso abusivo de drogas ilícitas, alcoolismo e tabagismo. Famílias desestruturadas, pais ausentes, companhia de amigos que levam a diferentes vícios, facilidade de acesso a fontes desencontradas de informações e uma sociedade indiferente afetam o desenvolvimento normal dos jovens. Considera-se, ainda, o grande desafio apresentado a profissionais de saúde em agir na busca de reduzir a vulnerabilidade dos adolescentes e permitir que os mesmo usem de autonomia com responsabilidade na tomada de decisões em suas vidas pessoais. O cuidado com os mesmos deve ser mais integral e ativo e a sociedade ainda não reconheceu adequadamente a importância de cuidar do desenvolvimento saudável desse imenso contingente humano.

  15. Mercosul educativo na carreira de Enfermagem

    Directory of Open Access Journals (Sweden)

    Roseli Schmoeller

    2012-10-01

    Full Text Available O Mercosul, instituído com vistas à integração econômica, política, social e cultural entre os países membros, atualmente destaca-se pelas estratégias integrativas de âmbito educacional. Este artigo aborda os movimentos acerca da formação acadêmica dos cursos de Enfermagem e o trajeto histórico de integração educacional, apresentando o Sistema de Acreditação dos Cursos Universitários do Mercosul, o ARCU-SUL, além dos setores responsáveis por esse processo e as perspectivas para a Enfermagem nos países do Mercosul. Entendemos que para o desenvolvimento de profissionais críticos, reflexivos e com compromisso político-social, é fundamental investir na formação e na qualidade dos centros de ensino em Enfermagem.

  16. Plantas indicadoras de clomazone na fase vapor

    Directory of Open Access Journals (Sweden)

    Fábio Schreiber

    2013-10-01

    Full Text Available A volatilização representa um processo importante no deslocamento de agrotóxicos para o ambiente. As características físico-químicas da molécula do clomazone indicam que este possui potencial de volatilização. Em vista do exposto, para a realização deste estudo, foram conduzidos dois experimentos com o objetivo de avaliar a suscetibilidade das espécies: pepino, melão, milho, sorgo e arroz a diferentes formulações do herbicida clomazone na fase vapor. Para isso, foram utilizadas caixas de vidro hermeticamente fechadas, com a presença de diferentes formulações de clomazone e as espécies vegetais. As formulações utilizadas foram Gamit 360 CS®, Gamit 500 EC® e Gamit Star®. Com os resultados obtidos, foi possível concluir que, dentre as espécies avaliadas, independente da formulação utilizada, a de menor tolerância ao herbicida clomazone na fase vapor foi o sorgo, seguido do milho e do arroz.

  17. Direito do poeta na literatura de cordel

    Directory of Open Access Journals (Sweden)

    Sale Mário Gaudêncio

    Full Text Available Este artigo apresenta uma análise situacional dos direitos autorais na literatura de cordel, especialmente no que se refere à proteção moral e patrimonial que é dada aos poetas populares. Justifica-se o estudo em função de não haver profundas nem atuais discussões teóricas sobre a preservação moral e patrimonial em torno das obras de cordel. Utiliza-se como metodologia a pesquisa bibliográfica relacionada a um corpusque analisa os folhetos impressos por poetas da literatura de cordel. O estudo mostra como resultados o estabelecimento de um modelo alternativo de prazos para os direitos autorais na poesia popular, além da necessidade de ruptura técnica, política e cultural. Conclui informando sobre a importância de se construir um banco de dados nacional para que se tenha conhecimento pleno do quê e como se está produzindo a literatura de cordel, além de saber quem verdadeiramente está sendo beneficiado com tais produções.

  18. Vinhos, Turismo e Pluriatividade na Agricultura

    Directory of Open Access Journals (Sweden)

    Hernanda Tonini

    2013-06-01

    Full Text Available A gastronomia, além de ter importante relação com a economia, é uma forma expressiva da cultura dos indivíduos, desde o tipo de alimentos cultivados até a maneira de seu preparo e consumo. O presente artigo propõe-se a analisar a relação entre o enoturismo – centralizado na existência do vinho enquanto elemento gastronômico – e o fenômeno da pluriatividade na agricultura familiar, vista nos últimos anos como alternativa positiva para sua reprodução econômica e social. O fluxo turístico em regiões vitivinícolas gera novas oportunidades de trabalho e faz com que agricultores e suas famílias dividam a mão de obra agrícola, até então direcionada ao cultivo da uva e outros alimentos para subsistência, com atividades não agrícolas – como o artesanato, o acolhimento de visitantes em pousadas, a atuação em restaurantes, entre outras – como chance de subsistência. Este panorama transforma as realidades do mundo rural, alterando a relação do agricultor com a produção de alimentos e a forma como o mesmo os utiliza, além de reestruturar o ambiente sociocultural no seu entorno.  

  19. Hadron production measurement from NA61/SHINE

    CERN Document Server

    Korzenev, A

    2013-01-01

    New results of NA61/SHINE on determination of charged hadron yields in proton-carbon interactions are presented. They aim to improve predictions of the neutrino flux in the T2K experiment. The data were recorded using a secondary-proton beam of 31 GeV/$c$ momentum from CERN SPS which impinges on a graphite target. To determine the inclusive production cross section for charged pions, kaons and protons the thin ($0.04\\, \\lambda_I$) target was exploited. Results of this measurement are used in the T2K beam simulation program to reweight hadron yields in the interaction vertex. At the same time, NA61/SHINE results obtained with the T2K replica target ($1.9\\, \\lambda_I$) allow to constrain hadron yields at the surface of the target. It would correspond to the constraint up to 90% of the neutrino flux, thus reducing significantly a model dependence of the neutrino beam prediction. All measured spectra are compared to predictions of hadron production models. In addition a status of the analysis of data collected by...

  20. The NA62 GigaTracker

    CERN Document Server

    Perrin-Terrin, Mathieu

    2015-01-01

    The GigaTracker is an hybrid silicon pixel detector built for the NA62 experiment aiming at measuring the branching fraction of the ultra-rare kaon decay K + ! p + n ̄ n at the CERN SPS. The detector has to track particles in a beam with a flux reaching 1.3 MHz/mm 2 and provide single-hit timing with 200ps RMS resolution for a total material budget of less than 1.5 X 0 . The tracker comprises three 60.8mm 27mm stations installed in vacuum ( 10$^{-6}$ mbar) and cooled with liquid C 6 F 14 circulating through micro-channels etched inside few hundred of microns thick silicon plates. Each station is composed of a 200 m m thick silicon sensor readout by 2 x 5 cus- tom 100 m m thick ASIC, called TDCPix. Each chip contains 40 x 45 asynchronous pixels, each 300 m m x 300 m m and is instrumented with 100ps bin time-to-digital converters. In order to cope with the high rate, the TDCPix is equipped with four 3.2Gb/s serialisers sending out the data. We will describe the detector and the results from the 2014 NA62 ru...

  1. NaCl处理对盐地碱蓬开花及Na+、K+含量的影响%Effects of NaCl Treatments on Flower Number, Na+and K+Contents of Suaeda salsa

    Institute of Scientific and Technical Information of China (English)

    郭建荣; 王宝山

    2014-01-01

    To investigate the role of salinity in lfowering of euhalophyte Suaeda salsa, lfower number of differ-ent branches and per plant, Na+, K+content and Na+/K+ratio of leaves, stems and lfowers of S. salsa were deter-mined under conditions of 1 (control), 200 and 400 mmol·L-1 NaCl treatment. Compared with the control, 200 mmol·L-1NaCl treatment signiifcantly increased the lfower number of branches and individual plant of S. salsa, the lfower number per plant increased by 69.90%, Na+content, Na+/K+ratio in the lfowers increased by 1.41 and 1.77 times respectively, Na+content, Na+/K+ratio in the leaves of the ifrst branches increased by 3.96 and 4.96 times respectively, and Na+content, Na+/K+ratio in the stems increased by 7.00 and 12.39 times respectively. Flower number per plant increased by 19.00%under 400 mmol·L-1 NaCl treatment, Na+content and Na+/K+ra-tio in lfowers increased by 2.09 and 3.21 times respectively, Na+content, Na+/K+ratio in the leaves of the ifrst branches increased by 4.28 and 6.50 times respectively, and Na+content, Na+/K+ratio in the stems increased by 7.65 and 15.40 times respectively. These results suggested that certain concentration of external NaCl promotes lfowering of euhalophytes S. salsa possibly via compartmentalization of Na+into leaves and stems and mobili-zation of K+in the leaves and stems into the lfowers to maintain a proper Na+/K+ratio in the lfowers.%为探讨盐地碱蓬(Suaeda salsa)开花与盐的关系,研究了1(对照)、200和400 mmol·L-1 NaCl处理对盐地碱蓬不同分枝和单株开花数目、叶片和茎及花器官中的Na+、K+含量及Na+/K+比的影响。结果表明:与对照相比,200 mmol·L-1 NaCl处理下盐地碱蓬分枝及单株开花数目增加最显著,单株开花数目增加了69.90%,花器官中的Na+含量、Na+/K+比分别增加了1.41倍和1.77倍,而一级叶片的Na+含量、Na+/K+比分别增加了3.96倍和4.96倍,茎中Na+含量、Na+/K+比分别增加了7.00倍和12.39倍。400 mmol

  2. Hydrogen sulfide induced disruption of Na+ homeostasis in the cortex.

    Science.gov (United States)

    Chao, Dongman; He, Xiaozhou; Yang, Yilin; Balboni, Gianfranco; Salvadori, Severo; Kim, Dong H; Xia, Ying

    2012-07-01

    Maintenance of ionic balance is essential for neuronal functioning. Hydrogen sulfide (H(2)S), a known toxic environmental gaseous pollutant, has been recently recognized as a gasotransmitter involved in numerous biological processes and is believed to play an important role in the neural activities under both physiological and pathological conditions. However, it is unclear if it plays any role in maintenance of ionic homeostasis in the brain under physiological/pathophysiological conditions. Here, we report by directly measuring Na(+) activity using Na(+) selective electrodes in mouse cortical slices that H(2)S donor sodium hydrosulfide (NaHS) increased Na(+) influx in a concentration-dependent manner. This effect could be partially blocked by either Na(+) channel blocker or N-methyl-D-aspartate receptor (NMDAR) blocker alone or almost completely abolished by coapplication of both blockers but not by non-NMDAR blocker. These data suggest that increased H(2)S in pathophysiological conditions, e.g., hypoxia/ischemia, potentially causes a disruption of ionic homeostasis by massive Na(+) influx through Na(+) channels and NMDARs, thus injuring neural functions. Activation of delta-opioid receptors (DOR), which reduces Na(+) currents/influx in normoxia, had no effect on H(2)S-induced Na(+) influx, suggesting that H(2)S-induced disruption of Na(+) homeostasis is resistant to DOR regulation and may play a major role in neuronal injury in pathophysiological conditions, e.g., hypoxia/ischemia.

  3. Apical Na+ permeability of frog skin during serosal Cl- replacement.

    Science.gov (United States)

    Leibowich, S; DeLong, J; Civan, M M

    1988-05-01

    Gluconate substitution for serosal Cl- reduces the transepithelial short-circuit current (Isc) and depolarizes short-circuited frog skins. These effects could result either from inhibition of basolateral K+ conductance, or from two actions to inhibit both apical Na+ permeability (PapNa) and basolateral pump activity. We have addressed this question by studying whole-and split-thickness frog skins. Intracellular Na+ concentration (CcNa) and PapNa have been monitored by measuring the current-voltage relationship for apical Na+ entry. This analysis was conducted by applying trains of voltage pulses, with pulse durations of 16 to 32 msec. Estimates of PapNa and CcNa were not detectably dependent on pulse duration over the range 16 to 80 msec. Serosal Cl- replacement uniformly depolarized short-circuited tissues. The depolarization was associated with inhibition of Isc across each split skin, but only occasionally across the whole-thickness preparations. This difference may reflect the better ionic exchange between the bulk medium and the extracellular fluid in contact with the basolateral membranes, following removal of the underlying dermis in the split-skin preparations. PapNa was either unchanged or increased, and CcNa either unchanged or reduced after the anionic replacement. These data are incompatible with the concept that serosal Cl- replacement inhibits PapNa and Na,K-pump activity. Gluconate substitution likely reduces cell volume, triggering inhibition of the basolateral K+ channels, consistent with the data and conclusions of S.A. Lewis, A.G. Butt, M.J. Bowler, J.P. Leader and A.D.C. Macknight (J. Membrane Biol. 83:119-137, 1985) for toad bladder. The resulting depolarization reduces the electrical force favoring apical Na+ entry. The volume-conductance coupling serves to conserve volume by reducing K+ solute loss. Its molecular basis remains to be identified.

  4. Aspectos valorizados por porfissionais de enfermagem na higiene pessoal e na higiene corporal do paciente

    Directory of Open Access Journals (Sweden)

    Elóide André Oliveira

    2003-10-01

    Full Text Available Survey descritivo, com o qual se objetivou identificar que aspectos da higiene corporal são valorizados pelos componentes da equipe de enfermagem, na higiene corporal pessoal e na higiene corporal do paciente. A pesquisa foi desenvolvida em oito instituições públicas de saúde e a amostra foi composta por 126 profissionais de enfermagem, correspondendo a 12,8% do total de 986 componentes das equipes de enfermagem destas instituições. Na higiene corporal pessoal, chamou a atenção o fato de que os cuidados com as unhas e com os cabelos tenham suplantado, no número de citações dos profissionais de enfermagem, aspectos básicos como o cuidado com as mãos. Na higiene corporal do paciente, o banho foi o aspecto considerado mais importante pelas três categorias profissionais; a higiene oral, pelas(os enfermeiras(os e auxiliares de enfermagem; e as unhas, pelas(os enfermeiras(os e técnicas(os de enfermagem.

  5. Polarization and Velocity Dependence of Associative Ionization in Na(3p)+Na(3p) Collisions

    NARCIS (Netherlands)

    Meijer, H.A.J.; Meulen, H.P. van der; Morgenstern, R.

    1987-01-01

    We have excited Na atoms of two counterrunning thermal beams by means of linearly polarized laser light and have investigated associative ionization processes. To this end we measured the total ionization signal as a function of the angle θ between light polarization and the relative collision veloc

  6. Na+ overload during ischemia and reperfusion in rat hearts : Comparison of the Na+/H+ exchange blockers EIPA, cariporide and eniporide

    NARCIS (Netherlands)

    ten Hove, M; van Emous, JG; van Echteld, CJA

    2003-01-01

    Intracellular myocardial Na+ overload during ischemia is an important cause of reperfusion injury via reversed Na+/Ca2+ exchange. Prevention of this Na+ overload can be accomplished by blocking the different Na+ influx routes. In this study the effect of ischemic inhibition of the Na+/H+ exchanger (

  7. Efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl

    Directory of Open Access Journals (Sweden)

    Maíra do PRADO

    Full Text Available Resumo Introdução O tratamento de plasma é uma tecnologia eficaz que pode manter as propriedades internas dos materiais inalteradas após o tratamento, modificando apenas a superfície. Objetivo Avaliar o efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl 6%. Material e método Foram utilizados 60 incisivos bovinos. A coroa foi removida, a raiz foi dividida e as faces planificadas, totalizando 120 segmentos referentes ao terço cervical. As amostras foram divididas em dois grupos: controle (imersa em NaOCl 6%, lavada com água destilada, seca, imersa em EDTA 17%, lavada e seca e plasma de oxigênio (após tratamento descrito no grupo controle, plasma de oxigênio foi aplicado por 30 s. As amostras foram avaliadas qualitativamente em relação à topografia por microscopia eletrônica de varredura, utilizando-se microfotografias com ampliação de 1.000×. O goniômetro Ramé-hart foi utilizado para a mensuração do ângulo de contato entre as superfícies e as seguintes soluções foram utilizadas: água, etilenoglicol e di-iodometano. Em seguida, a energia de superfície, representada pelas componentes polar e dispersiva, foi calculada. Avaliou-se também o escoamento dos cimentos Pulp Canal Sealer EWT (PCS e Real Sal SE (RS na superfície dentinária. Os dados foram analisados estatisticamente utilizando os testes Kruskal-Wallis e Mann-Whitney U (p<0,05. Resultado O tratamento com plasma levou à formação de uma camada semelhante à smear layer na superfície dentinária. Este tratamento levou a um aumento da energia de superfície e da componente polar, favorecendo a hidrofilicidade da superfície. Entretanto, desfavoreceu o escoamento do cimento PCS e não influenciou no escoamento do cimento RS. Conclusão O plasma de oxigênio ocasionou mudanças topográficas na superfície dentinária, favorecendo a hidrofilicidade desta. Contudo, não favoreceu o escoamento dos cimentos endodônticos na dentina.

  8. Regulation of persistent Na current by interactions between beta subunits of voltage-gated Na channels.

    Science.gov (United States)

    Aman, Teresa K; Grieco-Calub, Tina M; Chen, Chunling; Rusconi, Raffaella; Slat, Emily A; Isom, Lori L; Raman, Indira M

    2009-02-18

    The beta subunits of voltage-gated Na channels (Scnxb) regulate the gating of pore-forming alpha subunits, as well as their trafficking and localization. In heterologous expression systems, beta1, beta2, and beta3 subunits influence inactivation and persistent current in different ways. To test how the beta4 protein regulates Na channel gating, we transfected beta4 into HEK (human embryonic kidney) cells stably expressing Na(V)1.1. Unlike a free peptide with a sequence from the beta4 cytoplasmic domain, the full-length beta4 protein did not block open channels. Instead, beta4 expression favored open states by shifting activation curves negative, decreasing the slope of the inactivation curve, and increasing the percentage of noninactivating current. Consequently, persistent current tripled in amplitude. Expression of beta1 or chimeric subunits including the beta1 extracellular domain, however, favored inactivation. Coexpressing Na(V)1.1 and beta4 with beta1 produced tiny persistent currents, indicating that beta1 overcomes the effects of beta4 in heterotrimeric channels. In contrast, beta1(C121W), which contains an extracellular epilepsy-associated mutation, did not counteract the destabilization of inactivation by beta4 and also required unusually large depolarizations for channel opening. In cultured hippocampal neurons transfected with beta4, persistent current was slightly but significantly increased. Moreover, in beta4-expressing neurons from Scn1b and Scn1b/Scn2b null mice, entry into inactivated states was slowed. These data suggest that beta1 and beta4 have antagonistic roles, the former favoring inactivation, and the latter favoring activation. Because increased Na channel availability may facilitate action potential firing, these results suggest a mechanism for seizure susceptibility of both mice and humans with disrupted beta1 subunits.

  9. Study on phase equilibria in Na2 B4 O7 -NaBr-Na2 SO4 -H2O quaternary system at 348 K%Na2B4O7-NaBr-Na2SO4-H2O四元体系348K相平衡研究

    Institute of Scientific and Technical Information of China (English)

    宁慧逸; 桑世华; 王丹; 曾晓晓

    2012-01-01

    采用等温溶解平衡法研究Na2B4O7 -NaBr-Na2SO4-H2O四元体系在348 K的相平衡关系,测定了平衡液相的溶解度和密度.根据实验数据绘制相应相图.该四元体系相图中有1个共饱点E,3条单变量曲线E1E,E2E,E3E,3个结晶区的平衡固相分别为:NaBr,Na2SO4和Na2B4O7 · 5H2O.研究结果表明:该四元体系无复盐和固溶体生成,属于简单四元体系,NaBr对Na2B4O7·5H2O和Na2SO4有较强的盐析作用.并对NaBr和Na2B4O7在不同温度下含有的结晶水数进行了对比分析,简要讨论了密度变化规律.%The solubilities and densities of solution in Na2B4O7-NaBr- Na2SO4-H2O quaternary system at 348 K were determined by isothermal equilibrium method. Based on the experimental data, the equilibrium phase diagram was plotted, which consists of one invariant E, three univariant curves (E1E, E2E and E3E) , and three crystallization fields corresponding to NaBr, Na2SO4 and Na2B4O7 ? 5H2O. The experimental results indicate that the quaternary system is of simple eutectic type and no double salt and solid solution, and sodium bromide has the salting-out effect on Na2B4O7 ? 5H2O and Na2SO4. The densities transformation rules were discussed.

  10. Coordinated regulation of cardiac Na(+)/Ca (2+) exchanger and Na (+)-K (+)-ATPase by phospholemman (FXYD1).

    Science.gov (United States)

    Cheung, Joseph Y; Zhang, Xue-Qian; Song, Jianliang; Gao, Erhe; Chan, Tung O; Rabinowitz, Joseph E; Koch, Walter J; Feldman, Arthur M; Wang, JuFang

    2013-01-01

    Phospholemman (PLM) is the founding member of the FXYD family of regulators of ion transport. PLM is a 72-amino acid protein consisting of the signature PFXYD motif in the extracellular N terminus, a single transmembrane (TM) domain, and a C-terminal cytoplasmic tail containing three phosphorylation sites. In the heart, PLM co-localizes and co-immunoprecipitates with Na(+)-K(+)-ATPase, Na(+)/Ca(2+) exchanger, and L-type Ca(2+) channel. The TM domain of PLM interacts with TM9 of the α-subunit of Na(+)-K(+)-ATPase, while its cytoplasmic tail interacts with two small regions (spanning residues 248-252 and 300-304) of the proximal intracellular loop of Na(+)/Ca(2+) exchanger. Under stress, catecholamine stimulation phosphorylates PLM at serine(68), resulting in relief of inhibition of Na(+)-K(+)-ATPase by decreasing K(m) for Na(+) and increasing V(max), and simultaneous inhibition of Na(+)/Ca(2+) exchanger. Enhanced Na(+)-K(+)-ATPase activity lowers intracellular Na(+), thereby minimizing Ca(2+) overload and risks of arrhythmias. Inhibition of Na(+)/Ca(2+) exchanger reduces Ca(2+) efflux, thereby preserving contractility. Thus, the coordinated actions of PLM during stress serve to minimize arrhythmogenesis and maintain inotropy. In acute cardiac ischemia and chronic heart failure, either expression or phosphorylation of PLM or both are altered. PLM regulates important ion transporters in the heart and offers a tempting target for development of drugs to treat heart failure.

  11. The paranodal cytoskeleton clusters Na(+) channels at nodes of Ranvier.

    Science.gov (United States)

    Amor, Veronique; Zhang, Chuansheng; Vainshtein, Anna; Zhang, Ao; Zollinger, Daniel R; Eshed-Eisenbach, Yael; Brophy, Peter J; Rasband, Matthew N; Peles, Elior

    2017-01-30

    A high density of Na(+) channels at nodes of Ranvier is necessary for rapid and efficient action potential propagation in myelinated axons. Na+ channel clustering is thought to depend on two axonal cell adhesion molecules that mediate interactions between the axon and myelinating glia at the nodal gap (i.e., NF186) and the paranodal junction (i.e., Caspr). Here we show that while Na(+) channels cluster at nodes in the absence of NF186, they fail to do so in double conditional knockout mice lacking both NF186 and the paranodal cell adhesion molecule Caspr, demonstrating that a paranodal junction-dependent mechanism can cluster Na(+) channels at nodes. Furthermore, we show that paranode-dependent clustering of nodal Na(+) channels requires axonal βII spectrin which is concentrated at paranodes. Our results reveal that the paranodal junction-dependent mechanism of Na(+)channel clustering is mediated by the spectrin-based paranodal axonal cytoskeleton.

  12. Sociologia na complexidade Sociology in complexity

    Directory of Open Access Journals (Sweden)

    Gilson Lima

    2006-06-01

    Full Text Available O artigo se propõe a fazer uma introdução didática e informativa e, ao mesmo tempo, aprofundada sobre as conseqüências da emergência do paradigma da complexidade para a Sociologia. No desenrolar da narrativa, faz comparações, o que permite ao leitor não familiarizado com a temática da ciência identificar as diferenças macroparadigmáticas pré-modernas, da modernidade simples e da emergência do paradigma da complexidade. Define e exemplifica, sempre que possível, os termos, afirmações e princípios significativos para uma melhor compreensão do tema. Faz, também, inúmeras indicações, no interior da narrativa, de autores e obras, para que aqueles que desejarem continuar, possam mergulhar mais intensamente nos caminhos da sociologia da complexidade. O artigo inicia com uma introdução que define, a partir de Thomas Kuhn, o conceito de paradigma. A seguir, desenvolve de modo comparado, os princípios mais importantes do paradigma da complexidade. E, por fim, chama a atenção para alguns desafios da Sociologia na complexidade, alertando para os riscos da paralisação da complexidade na difícil tarefa de religarmos os saberes diante da hiperespecialização presente na crise do paradigma da modernidade simples.The article is a simultaneously didactic and informative deep introduction on the emergence of the paradigm of complexity for sociology. Along the narrative, we make comparisons, which allows the reader who is not familiar with the themes of science to identify the macro-paradigmatic pre-modern differences from simple modernity and the emergence of the paradigm of complexity. Whenever it is possible, we define and exemplify the terms, assertions, and principles that are significant for an understanding of the theme. We have also made numerous indications of authors and works within the narrative, thus those willing might take a deeper dive in the pathways of sociology of complexity. The article starts with an

  13. Simulation of Na D emission near Europa during eclipse

    Science.gov (United States)

    Cassidy, T.A.; Johnson, R.E.; Geissler, P.E.; Leblanc, F.

    2008-01-01

    The Cassini imaging science subsystem observed Europa in eclipse during Cassini's Jupiter flyby. The disk-resolved observations revealed a spatially nonuniform emission in the wavelength range of 200-1050 nm (clear filters). By building on observations and simulations of Europa's Na atmosphere and torus we find that electron-excited Na in Europa's tenuous atmosphere can account for the observed emission if the Na is ejected preferentially from Europa's dark terrain. Copyright 2008 by the American Geophysical Union.

  14. Mazungumzo na Adam Shafi juu ya uandishi wake wa riwaya

    OpenAIRE

    Diegner, Lutz; Shafi, Adam

    2012-01-01

    Adam Shafi aliyezaliwa mwaka 1940 kisiwani Unguja ni mmojawapo wa waandishi mashuhuri wa riwaya ya Kiswahili. Hivi sasa mwandishi yumo mbioni kukamilisha muswada wa riwaya yake ya sita iitwayo Mtoto wa Mama. Mbali na uandishi, Adam Shafi aliwahi kufanya kazi mbalimbali za uandishi wa habari na kazi za ushirika wa kimataifa. Ni furaha yetu kubwa kuwa hatimaye tunaweza kutoa mazungumzo hayo baada ya kuyapitia na kuyahariri kidogo tu, kwa vile tunaamini utamu wa lugha inavyozungumzwa katika hali...

  15. 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.

  16. 三元体系NaBr-Na2SO4-H2O 和 NaBr-KBr-H2O 373 K相平衡%Phase Equilibria of Two Ternary Systems NaBr-Na2SO4-H2O and NaBr-KBr-H2O at 373 K

    Institute of Scientific and Technical Information of China (English)

    桑世华; 崔瑞芝; 胡咏霞

    2014-01-01

    针对川西盆地富硼钾溴地下卤水组成,采用等温溶解平衡法研究了三元体系 NaBr-Na2SO4-H2O 和NaBr-KBr-H2O在373 K时的相平衡,测定了373 K条件下平衡溶液的溶解度和密度,根据实验数据绘制相应的相图和密度图。研究发现:两个三元体系在373 K条件下均属于简单共饱和型,无复盐及固溶体生成。相图中均有一个共饱和点,2个平衡固相结晶区和2条单变量曲线。在三元体系NaBr-Na2SO4-H2O中,平衡固相分别为:NaBr和Na2SO4,三元体系NaBr-KBr-H2O相应的平衡固相分别为:NaBr和KBr。并简单讨论了密度的变化规律。%Phase equilibria of two ternary systems NaBr-Na2SO4-H2O and NaBr-KBr-H2O at 373 K were studied by an isothermal solution saturation method. The solubility and density of these systems were determined experimentally and related phase diagrams were obtained. The results show that the two systems are both of simple type with no complex salts or solid solutions formed. Both of the phase diagrams show that they have one eutectic point, two univariant curves and two regions of crystallization. The solid phase in NaBr-Na2SO4-H2O is cpmposited of sodium bromide(NaBr) and sodium sulfate(Na2SO4), while sodium bromide(NaBr) and potassium bromide(KBr) are the components of the solid phase of NaBr-KBr-H2O. Density change of the two systems was discussed.

  17. Na-Zn liquid metal battery

    Science.gov (United States)

    Xu, Junli; Kjos, Ole Sigmund; Osen, Karen Sende; Martinez, Ana Maria; Kongstein, Ole Edvard; Haarberg, Geir Martin

    2016-11-01

    A new kind of membrane free liquid metal battery was developed. The battery employs liquid sodium and zinc as electrodes both in liquid state, and NaCl-CaCl2 molten salts as electrolyte. The discharge flat voltage is in the range of about 1.4 V-1.8 V, and the cycle efficiency achieved is about 90% at low discharge current densities (below 40 mA cm-2). Moreover, this battery can also be charged and discharged at high current density with good performance. The discharge flat voltage is above 1.1 V when it is discharged at 100 mA cm-2, while it is about 0.8 V with 100% cycle efficiency when it is discharged at 200 mA cm-2. Compared to other reported liquid metal battery, this battery has lower cost, which suggests broad application prospect in energy storage systems for power grid.

  18. The NA49 large acceptance hadron detector

    CERN Document Server

    Afanasiev, S V; Appelshäuser, H; Bächler, J; Barna, D; Barnby, L S; Bartke, Jerzy; Barton, R A; Betev, L; Bialkowska, H; Bieser, F; Billmeier, A; Blyth, C O; Böck, R K; Bormann, C; Bracinik, J; Brady, F P; Brockmann, R; Brun, R; Buncic, P; Caines, H L; Cebra, D; Cooper, G E; Cramer, J G; Csató, P; Cyprian, M; Dunn, J; Eckardt, V; Eckhardt, F; Empl, T; Eschke, J; Ferguson, M I; Fessler, H; Fischer, H G; Flierl, D; Fodor, Z; Frankenfeld, Ulrich; Foka, P Y; Freund, P; Friese, V; Ftácnik, J; Fuchs, M; Gabler, F; Gál, J; Ganz, R E; Gazdzicki, M; Gladysz-Dziadus, E; Grebieszkow, J; Günther, J; Harris, J W; Hegyi, S; Henkel, T; Hill, L A; Hlinka, V; Huang, I; Hümmler, H; Igo, G; Irmscher, D; Ivanov, M; Janik, R; Jacobs, P; Jones, P G; Kadija, K; Kolesnikov, V I; Kowalski, M; Lasiuk, B; Lévai, Peter; Liebicher, K; Lynen, U; Malakhov, A I; Margetis, S; Markert, C; Marks, C; Mayes, B W; Melkumov, G L; Mock, A; Molnár, J; Nelson, J M; Oldenburg, M; Odyniec, Grazyna Janina; Pálla, G; Panagiotou, A D; Pestov, Yu N; Petridis, A; Pikna, M; Pimpl, W; Pinsky, L; Piper, A; Porter, R J; Poskanzer, A M; Poziombka, S; Prindle, D J; Pühlhofer, F; Rauch, W; Reid, J G; Renfordt, R E; Retyk, W; Ritter, H G; Röhrich, D; Roland, C; Roland, G; Rudolph, H; Rybicki, A; Sammer, T; Sandoval, A; Sann, H; Schäfer, E; Schmidt, R; Schmischke, D; Schmitz, N; Schönfelder, S; Semenov, A Yu; Seyboth, J; Seyboth, P; Seyerlein, J; Siklér, F; Sitár, B; Skrzypczak, E; Squier, G T A; Stelzer, H; Stock, Reinhard; Strmen, P; Ströbele, H; Struck, C; Susa, T; Szarka, I; Szentpétery, I; Szymanski, P; Sziklai, J; Toy, M; Trainor, T A; Trentalange, S; Ullrich, T S; Vassiliou, Maria; Veres, G I; Vesztergombi, G; Vranic, D; Wang, F; Weerasundara, D D; Wenig, S; Whitten, C; Wieman, H H; Wienold, T; Wood, L; Yates, T A; Zimányi, J; Zhu, X Z; Zybert, R

    1999-01-01

    The NA49 detector is a wide acceptance spectrometer for the study of hadron production in p+p, p+A, and A+A collisions at the CERN SPS. The main components are 4 large volume TPCs for tracking and particle identification via $dE/dx$. TOF scintillator arrays complement particle identification. Calorimeters for transverse energy determination and triggering, a detector for centrality selection in p+A collisions, and beam definition detectors complete the set-up. A description of all detector components is given with emphasis on new technical realizations. Performance and operational experience are discussed in particular with respect to the high track density environment of central Pb+Pb collisions.

  19. Natureza e economia na teoria freudiana

    OpenAIRE

    Furlan,Reinaldo

    2000-01-01

    O objetivo deste artigo é apontar, em primeiro lugar, para a importância das noções de "força" e de "natureza" na obra freudiana e suas implicações para a cultura e a moral. De modo geral, apontar para a importância da Biologia no processo civilizatório, tanto à respeito das prerrogativas da espécie quanto do indivíduo. Em segundo lugar, apontar para a mudança ocorrida nessas questões com a introdução do conceito de "Eros". Privilegiamos a apresentação de dois textos para nosso propósito: o "...

  20. Violência na Terceira Idade

    OpenAIRE

    Vale, Soraia Domingues

    2014-01-01

    Projecto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciada em Criminologia No presente projeto, cujo tema é violência sobre os idosos, irão ser definidos, no Capítulo I, conceitos como envelhecimento, violência, tipos de violência, as características das vítimas e dos agressores, fatores de risco e de prevenção e o “estado da arte” sobre o fenómeno da violência na terceira idade. No Capítulo II, são abordados os locais ...

  1. UTJECAJ PROMJENJIVE POSLOVNE OKOLINE NA VRSTE RIZIKA

    OpenAIRE

    Jakaša, Tina; Bratić, Diana; Iliopoulos, Fivos

    2009-01-01

    Promjene u poslovnom okruženju uvele su novi tip rizika u poduzeća elektroprivrede. Zbog toga je za poduzeća elektroprivrede vrlo važno identificirati rizike i naći korelaciju među njima, te to činiti redovito kako bi se zaštitile i povećale vrijednost kompanije. U ovom se radu predlažu sljedeće tri hipoteze: H1 Postoje promjene u tipu rizika u poduzećima elektroprivrede tijekom zadnjih 10 godina. H2 Postoji korelacija između intenziteta tržišne konkurencije i utjecaja prisutnih/postojećih ti...

  2. O operar de um coletivo na web

    Directory of Open Access Journals (Sweden)

    Karen Eidelwein

    Full Text Available Analisamos o operar de um grupo de discussão na WEB buscando identificar seu agenciamento enquanto coletivo autoprodutivo. Estabelecemos sete indicadores de operação e cinco categorias temáticas. A visualização de cada um dos indicadores de operação em cada uma das categorias temáticas possibilitou compreender o operar do grupo como decorrente das próprias relações que foram sendo estabelecidas, em um processo autoprodutivo, de causalidade recursiva. Foi possível argumentar que o grupo apresentou indícios de um modo de instituir-se capaz de apontar para outras formas de relação em torno da construção de objetos coletivos teóricos voltados para a ação fora do espaço digital.

  3. O operar de um coletivo na WEB

    Directory of Open Access Journals (Sweden)

    Karen Eidelwein

    Full Text Available Analisamos o operar de um grupo de discussão na WEB buscando identificar seu agenciamento enquanto coletivo autoprodutivo. Estabelecemos sete indicadores de operação e cinco categorias temáticas. A visualização de cada um dos indicadores de operação em cada uma das categorias temáticas possibilitou compreender o operar do grupo como decorrente das próprias relações que foram sendo estabelecidas, em um processo autoprodutivo, de causalidade recursiva. Foi possível argumentar que o grupo apresentou indícios de um modo de instituir-se capaz de apontar para outras formas de relação em torno da construção de objetos coletivos teóricos voltados para a ação fora do espaço digital.

  4. LUZ, MELATONINA E ESTRESSE OXIDATIVO NA PISCICULTURA

    OpenAIRE

    2013-01-01

    Em peixes, como nos mamíferos, partes do sistema nervoso estão envolvidas em mecanismos para regulação dos sistemas corporais em sintonia com o meio. O fotoperíodo é traduzido em informações fisiológicas a partir da secreção de melatonina.Parece não haver barreiras morfofisiológicas para esta indolamina, isto é, a melatonina perfunde-se rapidamente em cada célula do organismo e em alguns casos interage com receptores e membrana situados na superfície celular, e parece estar ligada à ingestão ...

  5. Viva o Rock: vivenciando saberes na musicalidade

    OpenAIRE

    Mosca, Maristela de Oliveira

    2011-01-01

    Este trabalho parte da narrativa de um Projeto Musicalizador que tem como foco a construção de um espetáculo musical na Escola de Educação Básica. Neste recorte refletimos epistemologicamente sob as luzes dos Sete Saberes Necessários à Educação do Futuro, em uma interligação com os cenários dos Quatro Pilares da Educação – aprender a conhecer, aprender a fazer, aprender a viver juntos, aprender a ser, e as concepções pedagógicas do Orff-Schulwerk. A interlocução com os Pressupostos da Corpore...

  6. Inseminación artificial na vaca

    OpenAIRE

    Becerra González, Juan J.

    2011-01-01

    A Obstetricia e Reprodución (131504) é unha materia que se imparte no quinto curso da licenciatura en Veterinaria. Non existen requisitos previos legais e calquera alumno matriculado na licenciatura en Veterinaria pode cursar esta materia. Porén, é conveniente que o alumnado teña coñecementos previos de anatomía e fisioloxía veterinaria, así como de patoloxía xeral e propedeútica clínica. Tamén sería aconsellable que os estudantes teñan coñecementos básicos de TICs, xa que serán de...

  7. O retorno do religioso na contemporaneidade

    Directory of Open Access Journals (Sweden)

    Tiago Ribeiro Nunes

    2008-12-01

    Full Text Available O presente trabalho pretende analisar os novos modos de relação, entre a civilização e o sagrado, que emergem no contexto da contemporaneidade. Partindo principalmente das formulações freudianas e lacanianas sobre o tema, nosso objetivo primordial ao longo deste artigo é estabelecer parâmetros para compreender a ocorrência do "retorno ao sagrado no exato momento em que a humanidade enfrenta crises cada vez mais profundas e permanentes. Tal empreendimento nos permitirá verificar até que ponto o fortalecimento dos movimentos religiosos pode ser considerado como uma das conseqüências da queda dos referenciais que se realiza na contemporaneidade.

  8. Bullying: ato esburacado na angústia

    Directory of Open Access Journals (Sweden)

    Maria de Lourdes Soares Ornellas

    2012-04-01

    Full Text Available A noção de afeto está no campo do (desprazer, resultante de uma experiência afetiva de satisfação ou insatisfação, e que se manifesta nas necessidades do sujeito. Pode-se dizer que o afeto envolve a ambivalência de sentimentos, do mais agradável ao mais insuportável, e desempenha um papel estruturante para que o sujeito reencontre sua estrutura psíquica, exercendo uma ação mediadora e decisiva sobre a constituição do sujeito do desejo, orientando o seu projeto de vida, sua profissão, sua opção sexual, etc. Essa ambivalência de afetos deve ser exercitada na educação familiar e escolar, na fala e na escuta que o afeto (desprazeroso tem relevância e parece ser silenciado. O desprazer pode ser escandido pelos sintomas medo, depressão, irritabilidade, ansiedade, humilhação. Assim posto o bullying é também conhecido como a síndrome da humilhação. O objetivo da humilhação é a tentativa de destruição do sujeito; a perda da identificação revela um fantasma, na medida em que própria vítima se sente culpada por sofrer ou por estar sofrendo um ato esburacado porque uma das peças não é encontrada e, em lugar do encaixe, o que se mostra é um buraco, o que provoca a angústia entre quem perde e aquele que ganha. ABSTRACT: The notion of affect is thus in the field of (dis pleasure, resulting from an affective experience of satisfaction or dissatisfaction, and that manifests itself on the needs of the subject. You could say that the affection involves the ambivalence of feelings, the more enjoyable the more unbearable, and plays a structural role for the subject to rediscover his psychic structure, exerting a mediator and decisive action on the constitution of the subject of desire, directing the its design life, your profession, your sexual orientation, etc.. This ambivalence of feelings should be exercised in family education and school, talking and listening that affect (dis pleasure is relevant and appears to be

  9. Analiza preiskovalnih metod na primeru igre Scotland Yard

    OpenAIRE

    BELEJ, NEŽA

    2015-01-01

    V diplomskem delu se seznanimo s področjem umetne inteligence, ki se ukvarja z raziskovanjem namiznih iger in iskanjem njihovih programskih rešitev. Preučimo algoritem drevesnega preiskovanja Monte-Carlo in ga poskušamo čim bolj spretno prenesti na znano namizno igro Scotland Yard, pri čemer upoštevamo nasvete Nijssena in Winandsa. Osredotočimo se predvsem na tretjo fazo algoritma, simulacijo, katero se odločimo implementirati na tri različne načine (od manj naprednih do bolj naprednih), te n...

  10. DISKRIMINACIJA PRI ZAPOSLOVANJU IN DELU NA PODLAGI SPOLNE USMERJENOSTI

    OpenAIRE

    Markovič, Polona

    2012-01-01

    Ustavno zagotovljena pravica do enakosti, brez kakršnegakoli razlikovanja na podlagi osebnih okoliščin, predstavlja eno izmed temeljnih človekovih pravic. Za zagotavljanje enakega obravnavanja posameznikov in različnih skupin oseb na vseh področjih družbenega življenja je neizogibno potrebna natančna zakonska opredelitev varstva pred diskriminacijo. Prepoved diskriminacije je pravno regulirana v določilih mnogih dokumentov, sprejetih na mednarodni in nacionalni ravni. Diskriminacijo lahko naj...

  11. Study of thermal neutron capture in /sup 23/Na

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Ming; Shi Zongren; Zeng Xiantang; Li Guohua; Ding Dazhao

    1987-11-01

    Energies and intensities of 117 gamma-rays produced by the capture of thermal neutron in /sup 23/Na are measured by using a single Ge(Li) detector and a pair spectrometer. 107 gamma-rays are placed in the decay scheme consisting of 35 levels. The neutron binding energy is found to be 6959.51 (21) keV. The parameters of /sup 24/Na energy level density are determined with the Back-Shift Fermi Gas Model. The /sup 23/Na(n, ..gamma..)/sup 24/Na reaction is mainly a statistical process from the resonance capture of 2.85 keV state.

  12. Study of thermal neutron capture in /sup 23/Na

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Ming; Shi Zongren; Zeng Xiantang; Li Guohua; Ding Dazhao

    1989-04-01

    Energies and intensities of 117 gamma-rays produced by the capture of thermal neutrons in /sup 23/Na are measured by using a single Ge(Li) detector and a pair spectrometer. 107 gamma-rays are placed in a decay scheme consisting of 35 levels. The neutron binding energy is found to be 6959.51 (21) keV. The parameters of /sup 24/Na energy-level density are determined with the Back-Shift Fermi Gas Model. The /sup 23/Na(/ital n/,..gamma..) /sup 24/Na reaction is mainly a statistical process from the resonance capture of the 2.85 keV state.

  13. Pragmatična lingvistika I kontrastivne študije

    Directory of Open Access Journals (Sweden)

    Josip Jernej

    1991-12-01

    Full Text Available Nakon teoretskog uvoda analiziraju se u članku pragmatična značenja nekih često upotrebljenih "čestica" kao što su samo, lijepo, već, inače, i to tragom temeljnje rasprave Pavla Tekavčića iz god. 1989. Dodani su i njemački prijevodi hrvatskim primjerima što su u spomenutoj raspravi prevedeni na talijanski. Članak završava napomenama koji se odnose na inače zapostavljenu kategoriju uzvika i njihova moguća pragmatična značenja.

  14. Kaolin-based geopolymers with various NaOH concentrations

    Science.gov (United States)

    Heah, C. Y.; Kamarudin, H.; Mustafa Al Bakri, A. M.; Bnhussain, M.; Luqman, M.; Khairul Nizar, I.; Ruzaidi, C. M.; Liew, Y. M.

    2013-03-01

    Kaolin geopolymers were produced by the alkali-activation of kaolin with an activator solution (a mixture of NaOH and sodium silicate solutions). The NaOH solution was prepared at a concentration of 6-14 mol/L and was mixed with the sodium silicate solution at a Na2SiO3/NaOH mass ratio of 0.24 to prepare an activator solution. The kaolin-to-activator solution mass ratio used was 0.80. This paper aimed to analyze the effect of NaOH concentration on the compressive strength of kaolin geopolymers at 80°C for 1, 2, and 3 d. Kaolin geopolymers were stable in water, and strength results showed that the kaolin binder had adequate compressive strength with 12 mol/L of NaOH concentration. When the NaOH concentration increased, the SiO2/Na2O decreased. The increased Na2O content enhanced the dissolution of kaolin as shown in X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses. However, excess in this content was not beneficial for the strength development of kaolin geopolymers. In addition, there was the formation of more geopolymeric gel in 12 mol/L samples. The XRD pattern of the samples showed a higher amorphous content and a more geopolymer bonding existed as proved by FTIR analysis.

  15. NaCl胁迫对阿月浑子各器官Na+、K+吸收的影响%Effect of NaCl Stress on Na+ and K+ Uptakes by Different Organs of Pistachio

    Institute of Scientific and Technical Information of China (English)

    克热木·伊力; 袁琳; 马合木提·卡热

    2005-01-01

    在温室盆栽条件下,用NaCl处理新疆长果阿月浑子与美国品种Kerman,处理浓度为50、150、250和500 mmol·L-1,盐处理后5、10、20 d分别取叶、茎和根,测定各器官中Na+、K+含量及Na+/K+变化规律.研究结果表明,随着土壤盐浓度的增加,长果阿月浑子和Kerman的叶、茎和根中Na+离子含量在盐处理5、10、20 d后每个处理都表现出升高趋势;而两个品种的叶、根和茎中的K+含量在盐处理后其变化规律都不稳定.长果阿月浑子叶片、茎和根系中Na+/K+的比值在盐处理5 d和10 d都升高.Kerman的叶和根系中Na+/K+比值在处理5、10、20 d后升高;茎中Na+/K+处理10 d后升高,但20 d后没有明显变化.实验结果表明NaCl胁迫后,长果阿月浑子的叶片中Na+含量增加幅度均大于Kerman,Kerman根和茎中的Na+含量增加幅度大于长果阿月浑子;NaCl胁迫5 d和10 d后,长果阿月浑子叶片中的Na+/K+的比值高于Kerman,Kerman茎和根部中的Na+/K+的比值高于长果阿月浑子,表明了长果阿月浑子和Kerman都具有一定的耐盐性,但Kerman的耐盐性强于长果阿月浑子.由于叶片和根中Na+和Na+/K+比值的变化很稳定,可以确定为阿月浑子主要抗盐指标,茎中Na+/K+的变化规律较稳定,可以作为抗盐性参考指标.

  16. 蚕豆幼苗对NaCl和NaHCO3胁迫的生理响应%Physiological responses of Viciafaba L.seedlings under NaCl and NaHCO3 stress

    Institute of Scientific and Technical Information of China (English)

    乔枫; 罗桂花; 耿贵工

    2011-01-01

    Vicia faba L. Seedlings were treated with different concentrations of NaCl and NaHCO3 for 7 days,and the fresh weight, malondialdehyde (MDA) content, free proline content, and the activities of antioxidant enzymes were determined. The results were as follows. With the increase of NaCl and NaHCO3 concentrations, fresh weight of Vicia faba L. Seedlings first increased significantly and then declined, MDA and free proline contents increased significantly, and the increase extent under NaCl stress was lower than under NaHCO3. The activity of superoxide dismutase ( SOD) first increased significantly and then declined. The activity of peroxidase ( POD) increased significantly under NaCl stress, and first rose and then decreased significantly under NaHCO3 stress.The activity of catalase (CAT) increased significantly. In conclusion, Vicia faba L. Could resist salt and alkali stress to a certain degree. The responses of Vicia faba L. To alkali stress were more obvious than that to salt stress on average.%采用不同浓度的NaCl和NaHCO3处理蚕豆幼苗,处理7d后分别测定蚕豆幼苗鲜重、蚕豆叶片MDA和脯氨酸含量、蚕豆叶片抗氧化酶活性.结果显示,随NaCl和NaHCO3胁迫浓度的增加,蚕豆幼苗鲜重先显著增加后显著下降(P<0.05);叶中MDA和脯氨酸含量显著上升(P<0.05),NaCl低于NaHCO3的上升幅度;超氧化物歧化酶(SOD)活性先显著增加(P<0.05)然后下降;过氧化物酶(POD)活性在NaCl胁迫下显著升高(P<0.05),NaHCO3胁迫下先升高后显著降低(P<0.05);过氧化氢酶(CAT)活性显著增加(P<0.05).蚕豆具有一定程度的抗盐碱性,碱胁迫大于同浓度盐胁迫的伤害.

  17. Transcriptional regulators of Na, K-ATPase subunits

    Directory of Open Access Journals (Sweden)

    Zhiqin eLi

    2015-10-01

    Full Text Available The Na,K-ATPase classically serves as an ion pump creating an electrochemical gradient across the plasma membrane that is essential for transepithelial transport, nutrient uptake and membrane potential. In addition, Na,K-ATPase also functions as a receptor, a signal transducer and a cell adhesion molecule. With such diverse roles, it is understandable that the Na,K-ATPase subunits, the catalytic alpha-subunit, the beta-subunit and the FXYD proteins, are controlled extensively during development and to accommodate physiological needs. The spatial and temporal expression of Na,K-ATPase is partially regulated at the transcriptional level. Numerous transcription factors, hormones, growth factors, lipids and extracellular stimuli modulate the transcription of the Na,K-ATPase subunits. Moreover, epigenetic mechanisms also contribute to the regulation of Na,K-ATPase expression. With the ever growing knowledge about diseases associated with the malfunction of Na,K-ATPase, this review aims at summarizing the best-characterized transcription regulators that modulate Na,K-ATPase subunit levels. As abnormal expression of Na,K-ATPase subunits have been observed in many carcinoma, we will also discuss transcription factors that are associated with epithelial-to-mesenchymal transition, a crucial step in the progression of many tumors to malignant disease.

  18. LUZ, MELATONINA E ESTRESSE OXIDATIVO NA PISCICULTURA

    Directory of Open Access Journals (Sweden)

    Claudio Alberto Gellis de Mattos Dias

    2013-12-01

    Full Text Available Em peixes, como nos mamíferos, partes do sistema nervoso estão envolvidas em mecanismos para regulação dos sistemas corporais em sintonia com o meio. O fotoperíodo é traduzido em informações fisiológicas a partir da secreção de melatonina.Parece não haver barreiras morfofisiológicas para esta indolamina, isto é, a melatonina perfunde-se rapidamente em cada célula do organismo e em alguns casos interage com receptores e membrana situados na superfície celular, e parece estar ligada à ingestão de alimentos, crescimento e atividade locomotora de peixes. São moléculas importantes metabolizando espécies reativas de oxigênio a produtos inativos e, portanto, reduzindo o dano oxidativo.Este trabalho tem por objetivo fazer um breve levantamento em artigos recentes sobre luminosidade, melatonina e o estresse oxidativo em peixes, e correlaciona-los com piscicultura. Concluímos que a luminosidade parece estar ligada a produção de melatonina, e esta molécula antioxidante, que favorece a redução do estresse oxidativo, parecem melhorar o desempenho na produção de peixes em criadouros. Palavras-chave: Melatonina, estresse oxidativo, piscicultura. DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v3n3p169-176

  19. Mercury's Na Exosphere from MESSENGER Data

    Science.gov (United States)

    Killen, Rosemary M.; Burger, M. H.; Cassidy, T. A.; Sarantos, M.; Vervack, R. J.; McClintock, W. El; Merkel, A. W.; Sprague, A. L.; Solomon, S. C.

    2012-01-01

    MESSENGER entered orbit about Mercury on March 18, 2011. Since then, the Ultraviolet and Visible Spectrometer (UWS) channel of MESSENGER's Mercury Atmospheric and Surface Composition Spectrometer (MASCS) has been observing Mercury's exosphere nearly continuously. Daily measurements of Na brightness were fitted with non-uniform exospheric models. With Monte Carlo sampling we traced the trajectories of a representative number of test particles, generally one million per run per source process, until photoionization, escape from the gravitational well, or permanent sticking at the surface removed the atom from the simulation. Atoms were assumed to partially thermally accommodate on each encounter with the surface with accommodation coefficient 0.25. Runs for different assumed source processes are run separately, scaled and co-added. Once these model results were saved onto a 3D grid, we ran lines of sight from the MESSENGER spacecraft :0 infinity using the SPICE kernels and we computed brightness integrals. Note that only particles that contribute to the measurement can be constrained with our method. Atoms and molecules produced on the nightside must escape the shadow in order to scatter light if the excitation process is resonant-light scattering, as assumed here. The aggregate distribution of Na atoms fits a 1200 K gas, with a PSD distribution, along with a hotter component. Our models constrain the hot component, assumed to be impact vaporization, to be emitted with a 2500 K Maxwellian. Most orbits show a dawnside enhancement in the hot component broadly spread over the leading hemisphere. However, on some dates there is no dawn/dusk asymmetry. The portion of the hot/cold source appears to be highly variable.

  20. Growth mechanism of NaClO3 and NaBrO3 crystals from aqueous solutions

    Indian Academy of Sciences (India)

    V Surender; N Arundhathi; K Kishan Rao

    2006-10-01

    A study of growth rates of NaClO3 and NaBrO3 has been carried out using a small growth cell by in situ observation. Normal growth rates of {100} faces of NaClO3 and {111} faces of NaBrO3 along $\\langle 110 \\rangle$ direction are measured under relatively high supersaturation ranging from 3–8%. In the initial stages of growth, {100}, {110} and {111} faces develop in NaClO3 and gradually all the faces are replaced by the {100} faces only. In the case of NaBrO3, mostly {111} faces develop with occasional occurrence of small {100} faces at the intersection of {111} faces. The growth mechanisms are investigated from growth rate vs supersaturation plots and from the observations of surface features. In the present supersaturation range, the growth mechanism appears to be due to two-dimensional growth mechanism.

  1. Didaktična računalniška igra na temo osnov matematične logike

    OpenAIRE

    Zupančič, Katja

    2015-01-01

    V magistrskem delu Didaktična računalniška igra na temo osnov matematične logike smo predstavili nekaj osnovnih opredelitev pojma igra ter teorijo računalniških iger in izobraževalnih računalniških iger. Pregledali smo učne načrte (splošni učni načrt za matematiko, učni načrt za izbirna predmeta logika in matematična delavnica) in učbenike za osnovno šolo, kjer se pojavljajo teme osnov matematične logike, ter glavne učne cilje tekmovanja iz logike, ki ga organizira Zveza za tehnično kulturo S...

  2. Orbital-free molecular dynamics simulations of melting in $Na_{8}$ and $Na_{20} melting in steps

    CERN Document Server

    Aguado, A; Alonso, J A; Stott, M J; Aguado, Andres; Lopez, Jose M.; Alonso, Julio A.; Stott, Malcolm J.

    1999-01-01

    The melting-like transitions of Na8 and Na20 are investigated by extensive ab initio constant energy molecular dynamics simulations, using a variant of the Car-Parrinello method which employs an explicit electronic kinetic energy functional of the density, thus avoiding the use of one-particle orbitals. Several melting indicators are evaluated in order to determine the nature of the different transitions, and comparison with other theoretical calculations is made. Both Na8 and Na20 melt over a wide range of temperature. For Na8, a first transition is observed at approx. 110 K, between a rigid phase and a phase involving isomerization between the different permutational isomers of the ground state structure. The ``liquid'' phase is completely established at approx. 220 K. For Na20, three successive transitions are observed: the first phase transition, at approx. 110 K, is associated with isomerization transitions between those permutational isomers of the ground state structure which are obtained by interchang...

  3. Decomposition reactions for NaAl H4 , Na3 Al H6 , and NaH: First-principles study

    Science.gov (United States)

    Ke, Xuezhi; Tanaka, Isao

    2005-01-01

    The electronic properties and lattice dynamics of the sodium alanate phases have been studied by the density functional calculations. The phases include NaAlH4 (space group, I41/a ), Na3AlH6 (space group, P21/n ), and NaH (space group, Fm-3m ). The electronic properties are discussed on the basis of the electronic band structures, the atomic charges, the bond overlap population analysis, and the Born effective charges. The phonon dispersion relations and phonon density of states (DOS) of the phases are calculated by a direct force-constant method. Within the quasiharmonic approximation, the calculated thermodynamic functions including the heat capacity, the vibrational enthalpy, and the vibrational entropy are in good agreement with experimental values. Three decomposition reactions are studied based on the thermodynamic functions. The reactions are (1) NaAlH4→(1)/(3)Na3AlH6+(2)/(3)Al+H2 , (2) (1)/(3)Na3AlH6→NaH+(1)/(3)Al+(1)/(2)H2 , and (3) NaH→Na+(1)/(2)H2 . The reactions (1), (2), and (3) are predicted to take place at 285, 390, and 726K , respectively, which are in good agreement with the experiment (353, 423, and 698K , respectively). The individual contributions to the reactions including the enthalpy and entropy are investigated. We found that the enthalpy for the reaction is almost constant, and the net entropy contribution ( TΔS ) to the reaction is approximately equal to the entropy contribution of the H2 gas molecule (produced in that reaction).

  4. Determinants of Substrate and Cation Transport in the Human Na+/Dicarboxylate Cotransporter NaDC3*

    OpenAIRE

    Schlessinger, A; Sun, NN; Colas, C; Pajor, AM

    2014-01-01

    Metabolic intermediates, such as succinate and citrate, regulate important processes ranging from energy metabolism to fatty acid synthesis. Cytosolic concentrations of these metabolites are controlled, in part, by members of the SLC13 gene family. The molecular mechanism underlying Na+-coupled di- and tricarboxylate transport by this family is understood poorly. The human Na+/dicarboxylate cotransporter NaDC3 (SLC13A3) is found in various tissues, including the kidney, liver, and brain. In a...

  5. Impacto da perda de peso nas adipocitocinas, na proteína C-reativa e na sensibilidade à insulina em mulheres hipertensas com obesidade central

    OpenAIRE

    2007-01-01

    OBJETIVO: Avaliar o impacto do tratamento da obesidade nas adipocitocinas, na proteína C-reativa (PCR) e na sensibilidade à insulina em pacientes hipertensas com obesidade central. MÉTODOS: O estudo foi realizado a partir do banco de dados e de amostras estocadas de soro de pacientes submetidas previamente a um estudo para tratamento de obesidade. Foram selecionadas 30 mulheres hipertensas, com idade entre 18 e 65 anos, índice de massa corpórea (IMC) > 27 kg/m², com distribuição central ...

  6. Yoga como caminho de elevação na espiritualidade e na saúde

    OpenAIRE

    Lima, Vânia Cristina Lucena

    2010-01-01

    O presente estudo retrata uma pesquisa realizada em João Pessoa PB - durante o período de novembro de 2009 a outubro de 2010, sob a metodologia qualitativa da História Oral de Vida. Os objetivos foram analisar o significado do Yoga como um caminho para o desenvolvimento da espiritualidade e da saúde; delinear seu percurso histórico desde a Índia até a sua chegada na Paraíba; analisar os benefícios dessa prática na saúde física e mental das colaboradoras Ada Tavares Zenaide, Mércia Rios Ribe...

  7. VPLIV SPLETNIH SOCIALNIH OMREŽIJ NA LOGISTIČNA PODJETJA

    OpenAIRE

    Zagoranski, Tamara

    2012-01-01

    Vedno več podjetij se odloča za prodajo prek spleta, saj omogoča novejši pristop do potrošnikov, kar posledično vpliva na večjo produktivnost in razpoznavnost podjetij oziroma oglaševalcev. Učinkovito orodje za znatno povečanje uspešnosti podjetij je zagotovo socialno omrežje Facebook. Uporabi portala so se pridružili tudi tržniki, saj jim tak način oglaševanja omogoča lažjo vzpostavitev novih stikov s potencialnimi partnerji, sodelovanje s potrošniki in jim zagotavlja odskočno desko v mednar...

  8. Duas fontes de proteína na dieta de cordeiros confinados

    OpenAIRE

    Gallo, Sarita Bonagurio; MERLIN,Fernanda de Almeida; MACEDO,Cássio Moreira de; Reis, Viviane Aparecida Amin

    2015-01-01

    Objetivou-se comparar dietas para cordeiros em confinamento com dois níveis de proteína e duas fontes proteicas. Foram confinados 30 cordeiros machos, não-castrados, meio sangue Dorper com Santa Inês, com idade aproximada de 2,5 meses e peso vivo inicial médio de 23kg, divididos aleatoriamente em três tratamentos: dieta controle (15% PB), dieta com alta concentração de proteína verdadeira (farelo de soja, com 19% PB) e dieta com alta concentração de nitrogênio não protéico (uréia, 19% PB). O ...

  9. Impact of childhood stress on psychopathology Impacto de estresse na infância na psicopatologia

    Directory of Open Access Journals (Sweden)

    Elisa Brietzke

    2012-12-01

    Full Text Available OBJECTIVE: Advances in our knowledge of mental disorder (MD genetics have contributed to a better understanding of their pathophysiology. Nonetheless, several questions and doubts persist. Recent studies have focused on environmental influences in the development of MDs, and the advent of neuroscientific methodologies has provided new perspectives. Early life events, such as childhood stress, may affect neurodevelopment through mechanisms such as gene-environment interactions and epigenetic regulation, thus leading to diseases in adulthood. The aim of this paper is to review the evidence regarding the role of the environment, particularly childhood stress, in the pathophysiology of MD. METHODOLOGY: We reviewed articles that evaluated environmental influences, with a particular focus on childhood trauma, brain morphology, cognitive functions, and the development of psychopathology and MD. RESULTS AND CONCLUSION: MRI studies have shown that exposure to trauma at an early age can result in several neurostructural changes, such as the reduction of the hippocampus and corpus callosum. Cognitive performance and functioning are also altered in this population. Finally, childhood stress is related to an increased risk of developing MD such as depression, bipolar disorder, schizophrenia and substance abuse. We conclude that there is robust evidence of the role of the environment, specifically adverse childhood experiences, in various aspects of MD.OBJETIVO: Avanços no conhecimento da genética dos transtornos mentais (TM contribuíram para um melhor entendimento de suas bases fisiopatológicas. No entanto, dúvidas e questões ainda persistem. Estudos recentes têm se concentrado nas influências do ambiente no desenvolvimento de TM, e o advento de metodologias neurocientíficas oferece novas perspectivas. Eventos precoces de vida, como estresse na infância, podem ser capazes de alterar o neurodesenvolvimento através de mecanismos como intera

  10. Microhardness studies on as-grown faces of NaClO3 and NaBrO3 crystals

    Indian Academy of Sciences (India)

    K Kishan Rao; V Surender; B Saritha Rani

    2002-12-01

    Single crystals of NaClO3 and NaBrO3 are grown from their aqueous solutions at a constant temperature of 35°C by slow evaporation by using good quality seed crystals. Systematic microhardness studies are made on as-grown faces of these crystals at various loads. Typical cracks are observed at the corners of the impressions in NaClO3 whereas in addition to the cracks at the corners microcracks also appeared in NaBrO3 crystals around the impressions. The impressions formed in NaBrO3 are not very clear as in NaClO3, a possible mechanism for it is discussed. The work hardening index number () for both these crystals is around 1.6 suggesting that these are moderately harder samples. The hardness studies point out that NaBrO3 is harder than NaClO3 ( ≈ 100 kg/mm2), this could be due to strong inter ionic forces acting between Na–Br in NaBrO3 crystals. Using Gilman’s empirical relation, hardness values are calculated from the values of elastic constants (44) and are found to be close to the experimental results.

  11. Central role of the Na(+)-translocating NADH:quinone oxidoreductase (Na(+)-NQR) in sodium bioenergetics of Vibrio cholerae.

    Science.gov (United States)

    Steuber, Julia; Halang, Petra; Vorburger, Thomas; Steffen, Wojtek; Vohl, Georg; Fritz, Günter

    2014-12-01

    Vibrio cholerae is a Gram-negative bacterium that lives in brackish or sea water environments. Strains of V. cholerae carrying the pathogenicity islands infect the human gut and cause the fatal disease cholera. Vibrio cholerae maintains a Na(+) gradient at its cytoplasmic membrane that drives substrate uptake, motility, and efflux of antibiotics. Here, we summarize the major Na(+)-dependent transport processes and describe the central role of the Na(+)-translocating NADH:quinone oxidoreductase (Na(+)-NQR), a primary Na(+) pump, in maintaining a Na(+)-motive force. The Na(+)-NQR is a membrane protein complex with a mass of about 220 kDa that couples the exergonic oxidation of NADH to the transport of Na(+) across the cytoplasmic membrane. We describe the molecular architecture of this respiratory complex and summarize the findings how electron transport might be coupled to Na(+)-translocation. Moreover, recent advances in the determination of the three-dimensional structure of this complex are reported.

  12. Towards environmentally friendly Na-ion batteries: Moisture and water stability of Na2Ti3O7

    Science.gov (United States)

    Zarrabeitia, M.; Castillo-Martínez, E.; López Del Amo, J. M.; Eguía-Barrio, A.; Muñoz-Márquez, M. A.; Rojo, T.; Casas-Cabanas, M.

    2016-08-01

    We report here on the moisture and water stability of the promising Na-ion anode material Na2Ti3O7. Spontaneous Na+/H+ exchange is detected by PXRD after air exposure, forming solid solution compounds of the form Na2-xHxTi3O7 (0 techniques. Both mixed compositions crystallize in C2/m space group like H2Ti3O7, and therefore Na+/H+ exchange is found to involve a structural transition from AA stacking of [TiO6] layers to AB stacking sequence. The electrochemical behaviour of the mixed compositions vs. Na+/Na is studied as well as that of an electrode of pure Na2Ti3O7 prepared in water media. The water-processed electrode is shown to exhibit a superior cycling stability and therefore the results obtained highlight the potential of Na2Ti3O7 as a green, low cost anode material for NIBs.

  13. 43. Calmodulin regulating calcium sensitivity of Na channels

    Directory of Open Access Journals (Sweden)

    R. Vegiraju

    2016-07-01

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

  14. Jornalismos culturais na rede: uma experiência de pesquisa compartilhada na web

    Directory of Open Access Journals (Sweden)

    Geane Alzamora

    2008-11-01

    Full Text Available O projeto Jornalismos Culturais na Rede (www.fca.pucminas.br/jnc investiga, desde 2002, paradigmas de circulação de informação cultural na rede, a partir de trabalhos acadêmicos e produtos editoriais disponí­veis na Internet. Os principais objetivos da pesquisa referem-se a: i discutir modos possí­veis de se produzir conhecimento pela Internet, tendo por fundamento a idéia de pesquisa colaborativa; ii criar categorias para referenciar informações culturais hipermidiáticas; iii identificar como se conformam os paradigmas de circulação de informação cultural na Internet: iv avaliar, junto com a comunidade virtual que delineia o projeto, as bases conceituais de um possí­vel webjornalismo cultural. Palavras-chave cultura, webjornalismo, informação, comunidade virtual Abstract Cultural Webjournalism (www.fca.pucminas.br/jnc is a project that, since 2002, has been investigating models of cultural information, by departing from academics works and editorial products available in the Internet. The main objectives in this research are: i to discuss how is it possible to produce knowledge through the Internet, founded in the idea of "research in collaboration"; ii to create categories to refer to hypermediatic cultural information; iii to identify how models of cultural information are constituted in the Internet; iv to evaluate, with the virtual community that marks this project, the conceptual bases of a possible cultural webjournalism. Key words culture, webjournalism, information, virtual community

  15. North America and South America (NA-SA) neuropathy project.

    Science.gov (United States)

    Pasnoor, Mamatha; Nascimento, Osvaldo J M; Trivedi, Jaya; Wolfe, Gil I; Nations, Sharon; Herbelin, Laura; de Freitas, M G; Quintanilha, Giseli; Khan, Saud; Dimachkie, Mazen; Barohn, Richard

    2013-08-01

    Peripheral neuropathy is a common neurological disorder. There may be important differences and similarities in the diagnosis of peripheral neuropathy between North America (NA) and South America (SA). Neuromuscular databases were searched for neuropathy diagnosis at two North American sites, University of Kansas Medical Center and University of Texas Southwestern Medical Center, and one South American site, Federal Fluminense University in Brazil. All patients were included into one of the six major categories: immune-mediated, diabetic, hereditary, infectious/inflammatory, systemic/metabolic/toxic (not diabetic) and cryptogenic. A comparison of the number of patients in each category was made between North America and South America databases. Total number of cases in North America was 1090 and in South America was 1034 [immune-mediated: NA 215 (19.7%), SA 191 (18%); diabetic: NA 148 (13.5%), SA 236 (23%); hereditary: NA 292 (26.7%), SA 103 (10%); infectious/inflammatory: NA 53 (4.8%), SA 141 (14%); systemic/metabolic/toxic: NA 71 (6.5%), SA 124 (12%); cryptogenic: NA 311 (28.5%), SA 239 (23%)]. Some specific neuropathy comparisons were hereditary neuropathies [Charcot-Marie-Tooth (CMT) cases] in NA 246/292 (84.2%) and SA 60/103 (58%); familial amyloid neuropathy in SA 31/103 (30%) and none in NA. Among infectious neuropathies, cases of human T-lymphotropic virus type 1 (HTLV-1) neuropathy in SA were 36/141(25%), Chagas disease in SA were 13/141(9%) and none for either in NA; cases of neuropathy due to leprosy in NA were 26/53 (49%) and in SA were 39/141(28%). South American tertiary care centers are more likely to see patients with infectious, diabetic and hereditary disorders such as familial amyloid neuropathies. North American tertiary centers are more likely to see patients with CMT. Immune neuropathies and cryptogenic neuropathies were seen equally in North America and South America.

  16. Paisagismo e modernidade na europa na década de 1920

    Directory of Open Access Journals (Sweden)

    Euler Sandeville Júnior

    2007-12-01

    Full Text Available Experiências formais realizadas a partir do final da Primeira Guerra deram novo impulso à reformulação das concepções então correntes para os jardins. Notamos algumas tendências contrastantes que coexistiam nessa época: uma, então dominante, representada por um ambiente profissional respondendo a uma demanda particular e do Estado, de caráter conservador e nacionalista, outras, de renovação, representadas por paisagistas e por arquitetos de alguma forma vinculados às vanguardas. O objetivo deste trabalho é destacar duas tendências modernizantes atuando na produção paisagística na Europa dos anos de 1920. Uma delas, desenvolvida por paisagistas e arquitetos, mostra forte influência do cubismo e do expressionismo, convergindo para o art déco, dotada de forte conotação decorativa. Gabriel Guevrekian e Robert Mallet-Stevens, são alguns dos representantes dessa tendência. Outra tendência modernizante deve-se à atuação de representantes do nascente movimento moderno em arquitetura, tanto em sua abordagem dos jardins como também nos conceitos que empregaram na criação de espaços externos. Entre a ampla gama de experiências nesse sentido, vêem-se as posturas bem diversas apresentadas por arquitetos como Le Corbusier e Erik Gunnar Asplund.

  17. Synthesis and Structure of 1D Na6 Cluster Chain with Short Na-Na Distance: Organic like Aromaticity in Inorganic Metal Cluster

    CERN Document Server

    Khatua, S; Chattaraj, P K; Roy, D R; Bhattacharjee*, Manish; Chattaraj*, Pratim K.; Khatua, Snehadrinarayan; Roy, Debesh R.

    2006-01-01

    A unique 1D chain of sodium cluster containing (Na6) rings stabilized by a molybdenum containing metalloligand has been synthesized and characterized. DFT calculations show striking resemblance in their aromatic behaviour with the corresponding hydrocarbon analogues

  18. Experience with CsI(Na) crystals for calorimetry

    Energy Technology Data Exchange (ETDEWEB)

    Aulchenko, V.M. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Baibusinov, B.O. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Baldin, E.M. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Bondar, A.E. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Gaidarev, P.B. [Cornell Univ., Ithaca, NY (United States); Kuzmin, A.S. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Leontiev, L.A. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Oreshkin, S.B. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Ovechkin, R.P. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki; Shwartz, B.A. [Rossijskaya Akademiya Nauk, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki

    1996-09-21

    The performance of cesium iodide doped with sodium is studied. The design and parameters of a CsI(Na) endcap calorimeter for the KEDR detector are presented. Also reported are the results of the study of a calorimeter element consisting of a CsI(Na) crystal coupled to a vacuum phototriode. (orig.).

  19. The pea gene NA encodes ent-kaurenoic acid oxidase.

    Science.gov (United States)

    Davidson, Sandra E; Elliott, Robert C; Helliwell, Chris A; Poole, Andrew T; Reid, James B

    2003-01-01

    The gibberellin (GA)-deficient dwarf na mutant in pea (Pisum sativum) has severely reduced internode elongation, reduced root growth, and decreased leaflet size. However, the seeds develop normally. Two genes, PsKAO1 and PsKAO2, encoding cytochrome P450 monooxygenases of the subfamily CYP88A were isolated. Both PsKAO1 and PsKAO2 had ent-kaurenoic acid oxidase (KAO) activity, catalyzing the three steps of the GA biosynthetic pathway from ent-kaurenoic acid to GA(12) when expressed in yeast (Saccharomyces cerevisiae). In addition to the intermediates ent-7alpha-hydroxykaurenoic acid and GA(12)-aldehyde, some additional products of the pea KAO activity were detected, including ent-6alpha,7alpha-dihydroxykaurenoic acid and 7beta-hydroxykaurenolide. The NA gene encodes PsKAO1, because in two independent mutant alleles, na-1 and na-2, PsKAO1 had altered sequences and the five-base deletion in PsKAO1 associated with the na-1 allele cosegregated with the dwarf na phenotype. PsKAO1 was expressed in the stem, apical bud, leaf, pod, and root, organs in which GA levels have previously been shown to be reduced in na plants. PsKAO2 was expressed only in seeds and this may explain the normal seed development and normal GA biosynthesis in seeds of na plants.

  20. Naïve Bayes classification in R

    OpenAIRE

    Zhang, Zhongheng

    2016-01-01

    Naïve Bayes classification is a kind of simple probabilistic classification methods based on Bayes’ theorem with the assumption of independence between features. The model is trained on training dataset to make predictions by predict() function. This article introduces two functions naiveBayes() and train() for the performance of Naïve Bayes classification.

  1. Effect NaOH Concentration on Bagasse Ash Based Geopolymerization

    Directory of Open Access Journals (Sweden)

    Saloma

    2016-01-01

    Full Text Available Geopolymer is a natural adhesive material which can be developed as a substitute for cement. The natural ingredients which want to use should contain silica and alumina. This paper uses bagasse ash as a basic material of mortar geopolymer. As an adhesive, the bagasse ash should be mixed with water and another activator alkali such as sodium hydroxide (NaOH and sodium silicate (Na2SiO3. The NaOHs molarity variation are 8, 10, 12, 14 and 16 M with Na2SiO3/NaOH = 1,0 sand/bagasse ash = 2,75 and activator/bagasse ash = 0,42. This research use 50 × 50 × 50 mm cube sized specimen and conduct a compressive strength test with 3, 7, 14, 21 and 28 days. The fresh mortar test result showed that the use of NaOHs molarity variation influences the slump value and time setting. The bigger NaOH molarity variation that been used, the smaller slump value. But, the time setting is increased. While the result for density and compressive strength shown that the bigger NaOH molarity variation, the bigger density and the compressive strength. Maximum compressive strength resulted from the mixture of mortar geopolymer with 16 M concentration.

  2. Risbjerg: SF vandt valgkampen, NA og R tabte

    DEFF Research Database (Denmark)

    Thomsen, Søren Risbjerg

    2007-01-01

    ANALYSE: Endnu engang flyttede en valgkamp for alvor stemmer. SF gik undervejs 27 pct. frem, mens NA gik 34 pct. tilbage og R 26 pct. Udgivelsesdato: 25. november......ANALYSE: Endnu engang flyttede en valgkamp for alvor stemmer. SF gik undervejs 27 pct. frem, mens NA gik 34 pct. tilbage og R 26 pct. Udgivelsesdato: 25. november...

  3. A ideologia na obra de Antonio Carlos Pacheco e Silva

    Directory of Open Access Journals (Sweden)

    Francisco B. Assumpção Jr.

    Full Text Available O autor apresenta, através da obra de Antonio Carlos Pacheco e Silva, a questão ideológica na psiquiatria. Discute também sua importância naquele momento histórico brasileiro, bem como sua influência na psiquiatria brasileira até os dias de hoje.

  4. Transepithelial Na+ transport and the intracellular fluids: a computer study.

    Science.gov (United States)

    Civan, M M; Bookman, R J

    1982-01-01

    Computer simulations of tight epithelia under three experimental conditions have been carried out, using the rheogenic nonlinear model of Lew, Ferreira and Moura (Proc. Roy. Soc. London. B 206:53-83, 1979) based largely on the formulation of Koefoed-Johnsen and Ussing (Acta Physiol. Scand. 42: 298-308. 1958). First, analysis of the transition between the short-circuited and open-circuited states has indicated that (i) apical Cl- permeability is a critical parameter requiring experimental definition in order to analyze cell volume regulation, and (ii) contrary to certain experimental reports, intracellular Na+ concentration (ccNa) is expected to be a strong function of transepithelial clamping voltage. Second, analysis of the effects of lowering serosal K+ concentration (csK) indicates that the basic model cannot simulate several well-documented observations; these defects can be overcome, at least qualitatively, by modifying the model to take account of the negative feedback interaction likely to exist between the apical Na+ permeability and ccNa. Third, analysis of the strongly supports the concept that osmotically induced permeability changes in the apical intercellular junctions play a physiological role in conserving the body's stores of NaCl. The analyses also demonstrate that the importance of Na+ entry across the basolateral membrane is strongly dependent upon transepithelial potential, cmNa and csK; under certain conditions, net Na+ entry could be appreciably greater across the basolateral than across the apical membrane.

  5. The New Readout System of the NA62 LKr Calorimeter

    CERN Document Server

    Ceccucci, A; Farthouat, P; Lamanna, G; Rouet, J; Ryjov, V; Venditti, S

    2015-01-01

    The NA62 experiment [1] at CERN SPS (Super Proton Synchrotron) accelerator aims at studying Kaon decays with high precision. The high resolution Liquid Krypton (LKr) calorimeter, built for the NA48 [2] experiment, is a crucial part of the photon-veto system; to cope with the demanding NA62 re- quirements,itsback-endelectron icshadtobecompletelyrenewed. The new readout system is based on the Calorimeter REAdout Module (CREAM) [3], a 6U VME board whose design and pro- duction was sub-contracted to CAEN [4], with CERN NA62 group continuously supervising the de velopment and production phase. The first version of the board was delivered by the manufacturer in March 2013 and, as of June 2014, the full board production is ongoing. In addition to describing the CREAM board, all aspects of the new LKr readout system, including its integration within the NA62 TDAQ scheme, will be treated.

  6. Consumo de cafeína e prematuridade

    OpenAIRE

    de Souza, Rita Adriana Gomes; Sichieri,Rosely

    2005-01-01

    A cafeína (1, 3, 7-trimetilxantina) é uma metilxantina que facilmente atravessa a barreira placentária, com quantidades substanciais passando para o líquido amniótico, sangue do cordão umbilical, plasma e urina dos neonatos. As maiores fontes de cafeína são café, chá, chocolate e refrigerantes do tipo cola. Além disso, cerca de mil drogas prescritas e 2 mil drogas não prescritas contêm cafeína, e 25 dessas drogas podem ser usadas na gravidez. Embora estudos em animais indiquem que a cafeína l...

  7. Status of the KIMS-NaI experiment

    CERN Document Server

    Kim, Kyungwon

    2015-01-01

    KIMS-NaI is a direct detection experiment searching for Weakly Interacting Massive Particles (WIMP) via their scattering off of nuclei in a NaI(Tl) crystal. The KIMS-NaI collaboration has carried out tests of six crystals in the Yangyang underground laboratory in order to develope low-background NaI(Tl) crystals. Studies of internal backgrounds crystals have been performed with the goal of reducing backgrounds levels to 1 dru at 2 keV. Pulse shape discrimination (PSD) capabilities were also investigated for distinguishing between WIMP nuclear recoil signals and electron recoil backgrounds. The PSD analysis was applied to underground data with one low background NaI(Tl) detector and the evaluation of WIMP mass limit is ongoing.

  8. Difference in Photosynthetic Response of Ryegrass Seedling to NaCI and NaHCO3 Stress%黑麦草幼苗对NaCl和NaHCO3胁迫的光合响应差异

    Institute of Scientific and Technical Information of China (English)

    刘建新; 王鑫; 贾海燕; 李东波

    2012-01-01

    为了探讨牧草光合功能对盐、碱胁迫的响应差异,采用营养液砂培方法,分别研究了不同浓度(0、50、100、150、200mmol·L^-1)NaCl和NaHCOs胁迫对黑麦草幼苗生长、叶片光合色素含量、气体交换和叶绿素荧光参数、叶绿体Hill反应活力和ATPase活性的影响。结果表明:①随着处理浓度的增加,黑麦草幼苗全株干重、叶片叶绿素和类胡萝h素含量、净光合速率(Pa)、气孔导度(Ga)和蒸腾速率(Tr)明显下降。当NaCl浓度小于100mmol·L^-1时,胞间CO2浓度(Ci)显著降低,气孔限制值(Ls)明显增加,随着NaCl浓度进一步增大,G显著增加,Ls显著减小;NaHCOs胁迫下Ci随着处理浓度增大而显著增加,Ls则显著减小。但NaHCO3胁迫下各指标下降或增加的幅度大于NaCl胁迫。②随着NaCl和NaHCOs胁迫强度的增大,黑麦草幼苗荧光参数PSII最大光化学效率(Fv/Fm)、实际光化学效率(ФPSⅡ)、光化学淬灭(qp)及叶绿体Hill反应和ATPase活性明显下降,非光化学淬灭(NPQ)显著提高,叶片吸收的光能中用于光化学反应的比例(P)显著减小,天线热耗散的比例(D)显著增大。在相同浓度下,NaHCOs胁迫的各荧光参数及Hill反应和ATPase活性的变幅大于NaCl胁迫,说明NaHCO。胁迫对幼苗的伤害程度大于NaCI胁迫。由此表明,黑麦草对碱的耐性低于盐,这可能与碱的高pH值更多引起光合色素含量下降和光合机构受到严重伤害有关。%To explore the differences of photosynthetic responses of forage to saline stress and alkaline stress, ryegrass seedlings were exposed to Hoagland's nutrient solution at five NaC1 or NaHCO3 levels (0, 50, 100, 150, 200 mmol. L^-1), and the effects of NaCl and NaHCO3 stress on plant growth, photosynthetic pigment content, gas exchange and chlorophyll fluorescence parameters, and the activities of Hill reaction and

  9. A Avaliacäo na Narrativa

    Directory of Open Access Journals (Sweden)

    Solange de Azambuja Lira

    2008-04-01

    Full Text Available Neste trabalho pretendo analisar e discutir o papel da avaliação na narrativa de acordo com o modelo de Labov A avaliação segundo Labov e Waletzky (1967 e Labov (1972 a uma suspensão da ação básica da narrativa que tem por finalidade informar sobre a carga dramática ou o clima emocional da situação, eventos e protagonistas. E, segundo Labov, a razão de ser da narrativa, o meio que o narrador tem de indicar porque a estória e digna de ser narrada. Com a avaliação o narrador pode também enfatizar mais certos eventos do que outros e aumentar a sua influência no desenrolar dos eventos. A avaliação é um dos elementos estruturais da narrativa. Labov (1972:359-360 define a narrativa como "um metodo de recapitulação de experiências passadas Combinando uma sequência verbal de oracões a sequência de eventos que (segundo se infere ocorreram efetivamente." Os outros elementos estruturais da narrativa são: sínopse onde temos os eventos mais salientes da narrativa de uma forma resumida.

  10. Status for 2015, CERN NA63

    CERN Document Server

    Mikkelsen, RE; Wistisen, T

    2015-01-01

    We summarize the status for the CERN NA63 collaboration, where in 2015 we have had two runs at the CERN SPS, beamline H4: One with Ar ions at various energies around 75 GeV per nucleon, and one with electrons/positrons of 10-20 GeV. We previously refined and updated our theoretical analyses of bremsstrahlung and delta-electron emission from heavy, and medium-heavy, ultrarelativistic nuclei \\cite{Mikk15}. We thus concluded that - although not quite as interesting as for Pb projectiles - projectiles of Ar and/or Xe were suitable for the investigation, and for establishing the method to eventually measure the charge distribution of short-lived ($ct\\gtrsim3$m) fragments \\cite{Mikk14}. However, as the preliminary data analysis shows, the signal - which requires an intact projectile - is about three orders of magnitude lower than the background, stemming from photon emission (possibly originating from $\\pi^0$'s) in coincidence with projectiles that most likely are not intact after the collision. With the presently ...

  11. Lugares dos mortos na cristandade ocidental

    Directory of Open Access Journals (Sweden)

    Cláudia Rodrigues

    2013-01-01

    Full Text Available Resumo. Este artigo busca refletir sobre a forte associação entre morte e cristandade no Ocidente, buscando identificar os lugares dos mortos nos diferentes sistemas de cristandade. Propõe-se aqui a viabilidade de se pensar numa certa vinculação entre determinadas atitudes e representações diante da morte e do morrer e o sistema de cristandade vigente em determinados contextos históricos, entre fins da Antiguidade tardia e o século XX, mais especificamente em países nos quais a Igreja romana exerceu hegemonia sobre a sociedade. Procura argumentar que, enquanto predominou a modalidade “constantiniana”, os mortos faziam parte do cotidiano e a morte e foram instrumentos do projeto cristianizador. Quando este modelo de Cristandade recuou, diante da emergência da chamada “Cristandade pós-constantiniana” – na qual a Igreja não mais era braço do aparelho estatal –, os mortos tinham sido afastados da cidade dos vivos e a morte, ou melhor, o medo da morte não mais representava instrumento de pressão sobre a consciência do cidadão

  12. Endurance testing with Li/Na electrolyte

    Energy Technology Data Exchange (ETDEWEB)

    Ong, E.T.; Remick, R.J.; Sishtla, C.I. [Institute of Gas Technology, Des Plaines, IL (United States)

    1996-12-31

    The Institute of Gas Technology (IGT), under subcontract to M-C Power Corporation under DOE funding, has been operating bench-scale fuel cells to investigate the performance and endurance issues of the Li/Na electrolyte because it offers higher ionic conductivity, higher exchange current densities, lower vapor pressures, and lower cathode dissolution rates than the Li/K electrolyte. These cells have continued to show higher performance and lower decay rates than the Li/K cells since the publication of our two previous papers in 1994. In this paper, test results of two long-term 100-cm{sup 2} bench scale cells are discussed. One cell operated continuously at 160 mA/cm{sup 2} for 17,000 hours with reference gases (60H{sub 2}/20CO{sub 2}/20H{sub 2}O fuel at 75% utilization and 30CO{sub 2}/70 air oxidant humidified at room temperature at 50% utilization). The other cell operated at 160 mA/cm{sup 2} for 6900 hours at 3 atm with system gases (64H{sub 2}/16CO{sub 2}/20H{sub 2}O at 75% utilization and an M-C Power system-defined oxidant at 40% utilization). Both cells have shown the highest performance and longest endurance among IGT cells operated to date.

  13. Absorto na ação

    Directory of Open Access Journals (Sweden)

    Michael Fried

    2010-07-01

    Full Text Available O filme Zidane, um retrato do século XXI, de Douglas Gordon e Philippe Parreno (2006 pertence à tradição de absorção que desempenhou um papel crucial na evolução da arte moderna. O autor explora a tensão entre absorção e teatralidade - central tanto para a pintura francesa do século XVIII como para a fotografia dos séculos XX e XXI - e tira conseqüências estéticas e filosóficas do filme que retrata, ao longo de todos os noventa minutos de uma partida de futebol, o meio-campista francês Zinedine Zidane.Zidane, a 21st Century Portrait, a film by Douglas Gordon and Philippe Perreno, belongs to the absorptive tradition that has played a central role in the evolution of modern art. The author explores the tension between absorption and theatricality - crucial to 18th century French art as well as to 20th and 21th century photography - and draws aesthetic and philosophical consequences of this film that depicts, throughout all the 90 minutes of a soccer match, the French midfielder Zinedine Zidane.

  14. The NA62 GigaTracker

    CERN Document Server

    Aglieri Rinella, G; Arcidiacono, R; Biino, C; Bonacini, S; Ceccucci, A; Chiozzi, S; Cortina Gil, E; Cotta Ramusino, A; Degrange, J; Fiorini, M; Gamberini, E; Gianoli, A; Kaplon, J; Kluge, A; Mapelli, A; Marchetto, F; Minucci, E; Morel, M; Noël, J; Noy, M; Perktold, L; Perrin-Terrin, M; Petagna, P; Petrucci, F; Poltorak, K; Romagnoli, G; Ruggiero, G; Velghe, B; Wahl, H

    2016-01-01

    The GigaTracker is a hybrid silicon pixel detector built for the NA62 experiment aiming at measuring the branching fraction of the ultra-rare kaon decay K+→π+νν¯ at the CERN SPS. The detector has to track particles in a beam with a flux reaching 1.3 MHz/mm2 and provide single-hit timing with 200 ps RMS resolution for a total material budget of less than 0.5% X0 per station. The tracker comprises three 60.8 mm×27 mm stations installed in vacuum (∼10$^{−6}$mbar) and cooled with liquid C6F14 circulating through micro-channels etched inside a few hundred micron thick silicon plates. Each station is composed of a 200 μm thick silicon sensor read out by 2×5 custom 100 μm thick ASICs, called TDCPix. Each chip contains 40×45 asynchronous pixels, 300 μm×300 μm each and is instrumented with 100 ps bin time-to-digital converters. In order to cope with the high rate, the TDCPix is equipped with four 3.2 Gb/s serialisers sending out the data. We will describe the detector and the results from the 2014 an...

  15. Glutamate transporter activity promotes enhanced Na+/K+-ATPase-mediated extracellular K+ management during neuronal activity

    DEFF Research Database (Denmark)

    Larsen, Brian Roland; Holm, Rikke; Vilsen, Bente;

    2016-01-01

    , in addition, Na+/K+-ATPase-mediated K+ clearance could be governed by astrocytic [Na+]i. During most neuronal activity, glutamate is released in the synaptic cleft and is re-absorbed by astrocytic Na+-coupled glutamate transporters, thereby elevating [Na+]i. It thus remains unresolved whether the different Na...... constellations in Xenopus oocytes and determined their apparent Na+ affinity in intact oocytes and isolated membranes. The Na+/K+-ATPase was not fully saturated at basal astrocytic [Na+]i, irrespective of isoform constellation, although the β1 subunit conferred lower apparent Na+ affinity to the α1 and α2...

  16. "Penas especiais para homens especiais": as teorias biodeterministas na Criminologia Brasileira na década de 1940

    OpenAIRE

    2005-01-01

    Analisa os conceitos de periculosidade e de classificação dos criminosos na Revista de Direito Penal e Revista Brasileira de Criminologia na década de 1940. Exemplifica a continuidade, dentro do campo da Criminologia, das teorias que pregavam o determinismo biológico, no pós-guerra.

  17. In vivo PTH provokes apical NHE3 and NaPi2 redistribution and Na-K-ATPase inhibition

    DEFF Research Database (Denmark)

    Zhang, Y; Norian, J M; Magyar, C E

    1999-01-01

    The aim of this study was to test the hypothesis that in vivo administration of parathyroid hormone (PTH) provokes diuresis/natriuresis through redistribution of proximal tubule apical sodium cotransporters (NHE3 and NaPi2) to internal stores and inhibition of basolateral Na-K-ATPase activity....... With this diuresis/natriuresis, 25% of NHE3 and 18% of NaPi2 immunoreactivity redistributed from apical membranes to higher density fractions containing intracellular membrane markers, and basolateral Na-K-ATPase activity decreased 25%. [Nle8,18,Tyr34]PTH-(3-34) failed to increase V or CLi or to provoke...... redistribution of NHE3 or NaPi2, but it did inhibit Na-K-ATPase activity 25%. We conclude that in vivo PTH stimulates natriuresis/diuresis associated with internalization of apical NHE3 and NaPi2 and inhibition of Na-K-ATPase activity, that cAMP-protein kinase A stimulation is necessary for the natriuresis/diuresis...

  18. Kusheh, na minem Fatu, en mi na koko farmer Hello, I am Fatu and I am a cocoa farmer

    NARCIS (Netherlands)

    Witteveen, L.M.; Goris, Margriet; Lie, R.; Ingram, V.J.

    2016-01-01

    This document reports on the development of a prototype Digital Farmer Field School (DFFS) called Kusheh, na minem Fatu, en mi na koko farmer (“Hello, I am Fatu and I am a cocoa farmer”). The DFFS provides an ICT-based alternative to traditional agricultural extension. More specifically, it offers a

  19. Artesanato na terceira idade: um estudo na cidade de Sinop no ano de 2011

    Directory of Open Access Journals (Sweden)

    Rosane Marlene Weber

    2015-04-01

    Full Text Available Essa pesquisa tem como objetivo mostrar a importância do artesanato na Terceira Idade como atividade educacional e de autonomia para os idosos. Por existir uma preocupação com a qualidade de vida da Terceira Idade e sua autonomia, nesta fase que muitos acabam ficando dependentes dos membros da família, espera-se encontrar através da arte uma motivação e uma forma de demonstrar a autoria por meio do fazer, criar e recriar com o artesanato. Aprender e ensinar são um processo contínuo na vida do ser humano, independente da idade, para Paulo Freire precisamos ter consciência de que somos inacabados, e sendo conscientes de nossa inconclusão, devemos viver num permanente movimento de busca. Essa é uma das causas pelas quais será pesquisada a prática formativa/educacional por meio do artesanato na Terceira Idade. Os motivos que levaram a escolha desta pesquisa com o artesanato na Terceira Idade é o fato de ter vivido uma experiência de trabalho na ala geriátrica de um hospital. Já o artesanato é a arte que fascina, e acreditamos que sempre há tempo para recomeçar, para descobrir algo que possa trazer qualidade para nossa vida. Devido ao crescimento cada vez maior da expectativa de vida em nosso país, cria-se uma preocupação com a qualidade de vida das pessoas da Terceira Idade. Em relação aos aspectos educacionais e culturais, esta pesquisa deseja compreender como o artesanato pode trazer motivação para as pessoas da Terceira Idade como forma de autoria e autonomia, nesta fase da vida, na cidade de Sinop, e quais os motivos que os levam a realizar esse tipo de atividade. Para investigação teórica desta pesquisa do Artesanato na Terceira Idade: um estudo na cidade de Sinop em 2011 usaremos bibliografia de vários autores, mas em especial os que dedicam seus estudos a esta faixa etária, como a coleção de Vivaidade, que tem como organizadora principal Anita Liberalesso Neri. Os autores desta coleção nos trazem a reflex

  20. In situ fluorescence imaging of glutamate-evoked mitochondrial Na+ responses in astrocytes.

    Science.gov (United States)

    Bernardinelli, Yann; Azarias, Guillaume; Chatton, Jean-Yves

    2006-10-01

    Astrocytes can experience large intracellular Na+ changes following the activation of the Na+-coupled glutamate transport. The present study investigated whether cytosolic Na+ changes are transmitted to mitochondria, which could therefore influence their function and contribute to the overall intracellular Na+ regulation. Mitochondrial Na+ (Na+(mit)) changes were monitored using the Na+-sensitive fluorescent probe CoroNa Red (CR) in intact primary cortical astrocytes, as opposed to the classical isolated mitochondria preparation. The mitochondrial localization and Na+ sensitivity of the dye were first verified and indicated that it can be safely used as a selective Na+(mit) indicator. We found by simultaneously monitoring cytosolic and mitochondrial Na+ using sodium-binding benzofuran isophthalate and CR, respectively, that glutamate-evoked cytosolic Na+ elevations are transmitted to mitochondria. The resting Na+(mit) concentration was estimated at 19.0 +/- 0.8 mM, reaching 30.1 +/- 1.2 mM during 200 microM glutamate application. Blockers of conductances potentially mediating Na+ entry (calcium uniporter, monovalent cation conductances, K+(ATP) channels) were not able to prevent the Na+(mit) response to glutamate. However, Ca2+ and its exchange with Na+ appear to play an important role in mediating mitochondrial Na+ entry as chelating intracellular Ca2+ with BAPTA or inhibiting Na+/Ca2+ exchanger with CGP-37157 diminished the Na+(mit) response. Moreover, intracellular Ca2+ increase achieved by photoactivation of caged Ca2+ also induced a Na+(mit) elevation. Inhibition of mitochondrial Na/H antiporter using ethylisopropyl-amiloride caused a steady increase in Na+(mit) without increasing cytosolic Na+, indicating that Na+ extrusion from mitochondria is mediated by these exchangers. Thus, mitochondria in intact astrocytes are equipped to efficiently sense cellular Na+ signals and to dynamically regulate their Na+ content.

  1. Corrosion Behaviours of Copper Alloy in Solutions Containing Na2SO4 and NaCl with Different Concentrations

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Potentiodynamic polarisation, potential-time measurements, X-ray diffraction (XRD) and infrared spectroscopy (IR)have been used to investigate the effect of different concentrations of Na2SO4 in the absence and presence of NaCl,on the corrosion of Cu-alloy. The electrochemical measurements showed that the increase of Na2SO4 concentration led to increase the corrosion current density of Cu alloy and vice versa. The presence of NaCl shifted the potential to more cathodic potential, which had a great influence on the protectiveness of the Cu oxide layer formed on the surface in presence of Na2SO4. The spectrometric measurements indicated the constituents of the film formed on the alloy surface were mainly Cu2O, in addition to the oxides, NiO and Fe2O3, which were traced by XRD analysis.

  2. Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold

    CERN Document Server

    Xu, Jingke; Calaprice, Frank; Westerdale, Shawn; Froborg, Francis; Suerfu, Burkhant; Alexander, Thomas; Aprahamian, Ani; Back, Henning O; Casarella, Clark; Fang, Xiao; Gupta, Yogesh K; Ianni, Aldo; Lamere, Edward; Lippincott, W Hugh; Liu, Qian; Lyons, Stephanie; Siegl, Kevin; Smith, Mallory; Tan, Wanpeng; Kolk, Bryant Vande

    2015-01-01

    The dark matter interpretation of the DAMA modulation signal depends on the NaI(Tl) scintillation efficiency of nuclear recoils. Previous measurements for Na recoils have large discrepancies, especially in the DAMA/LIBRA modulation energy region. We report a quenching effect measurement of Na recoils in NaI(Tl) from 3keV$_{\\text{nr}}$ to 52keV$_{\\text{nr}}$, covering the whole DAMA/LIBRA energy region for light WIMP interpretations. By using a low-energy, pulsed neutron beam, a double time-of-flight technique, and pulse-shape discrimination methods, we obtained the most accurate measurement of this kind for NaI(Tl) to date. The results differ significantly from the DAMA reported values at low energies, but fall between the other previous measurements. We present the implications of the new quenching results for the dark matter interpretation of the DAMA modulation signal.

  3. X-ray powder diffraction studies and thermal behaviour of NaK 2B 9O 15, Na(Na .17K .83) 2B 9O 15, and (Na .80K .20)K 2B 9O 15

    Science.gov (United States)

    Bubnova, R.; Albert, B.; Georgievskaya, M.; Krzhizhanovskaya, M.; Hofmann, K.; Filatov, S.

    2006-09-01

    The crystal structures of NaK 2B 9O 15 ( a=9.1158(1) Å, b=6.6246(1) Å, c=20.6812(3) Å, β=94.080(1)°, R=0.047, R=0.059, R=0.026), Na(Na .17K .83) 2B 9O 15 ( a=9.0559(1) Å, b=6.6170(1) Å, c=20.5833(3) Å, β=94.228(2)°, R=0.053, R=0.068, R=0.026), and (Na .80K .20)K 2B 9O 15 ( a=9.1534(1) Å, b=6.6296(1) Å, c=20.7422(3) Å, β=94.071(1)°, Z=4, R=0.041, R=0.052, R=0.023) were refined in the monoclinic space groups P2 1/ c(Z=4) using X-ray powder diffraction data and the Rietveld method. These nonaborates are isostructural to K 3B 9O 15. Their crystal structure consists of a three-dimensional open framework built up from three crystallographically independent triborate groups. The alkali metal cations are located on three different sites in the voids of the framework. High-temperature X-ray diffraction studies show that NaK 2B 9O 15 decomposes at about 700 °C in accordance with the peritectic reaction NaK 2B 9O 15↔K 5B 19O 31+liquid. The thermal expansion of NaK 2B 9O 15 and Na(Na .17K .83) 2B 9O 15 is highly anisotropic. A similarity of the thermal and compositional (Na-K substitution) deformations of NaK 2B 9O 15 is revealed: heating of NaK 2B 9O 15 by 1 °C leads to the same deformations of the crystal structure as increasing the amount of K atoms in (Na 1-xK x) 3B 9O 15 by 0.04 at% K.

  4. Texturization of monocrystalline silicon with Na2CO3/NaHCO3 solution%使用Na2CO3/NaHCO3体系进行单晶硅制绒

    Institute of Scientific and Technical Information of China (English)

    张启华; 汤俊琪; 满石清

    2013-01-01

    The conversion efficiency of solar cell could be improved by reducing the reflectivity of solar panel by texturing the panel surface. In this study, the surfaces of monocrystalline silicon chips, a common type of solar panel, were texturized with Na2CO3, NaHCO3 and Na2CO3/NaHCO3 solution. The morphology and reflectivity of the texturized surfaces were characterized with scanning electron microscope (SEM) and UV-Vis spectrophotometer, respectively, and the effects of solution concentration, solution composition and reaction time on the reflectivity of the texturized surfaces were studied. The results show that a texturized surface with a reflectivity of 15.22% can be prepared by immersing the silicon chip in the Na2CO3/NaHCO3 solution containing 12wt% Na2CO3 and 1.2wt% for 10 minutes at 85 ℃.%通过单晶硅表面制绒可以降低太阳能电池面板对光的反射率进而提高电池的转化效率.利用Na2CO3、NaHCO3和Na2CO3/NaHCO3溶液进行了单晶硅表面制线,并利用扫描电子显微镜和紫外/可见光光度计对所得绒面的形貌及反色率分别进行了分析.研究了溶液浓度、溶液组成及反应时间等因素对所制单晶硅绒面反射率的影响.结果表明:在Na2CO3∶NaHCO3质量比为10∶1,反应温度为85℃,反应时间为10 min时,可获得反射率为15.22%的绒面.

  5. Desempenho Produtivo de Novilhos Nelore, na Recria e na Engorda, Recebendo Dietas com Diferentes Níveis de Concentrado e Proteína

    Directory of Open Access Journals (Sweden)

    Silva Fabiano Ferreira da

    2002-01-01

    Full Text Available Foram utilizados 36 novilhos Nelore inteiros, com peso vivo médio inicial de 240 kg, sendo quatro novilhos de referência e o restante distribuído em oito tratamentos, com quatro diferentes níveis de concentrado nas dietas (20, 40, 60 e 80% e dois níveis de proteína bruta (PB (15 e 18%, expressos na MS. Avaliaram-se os consumos de matéria seca (MS, matéria orgânica (MO, PB, fibra em detergente neutro (FDN e nutrientes digestíveis totais (NDT, os ganhos médios diários de peso vivo (GMD, de peso de corpo vazio (GMPVZ e de carcaça (GC e a conversão alimentar (CA. O consumo de MS não foi influenciado pelo nível de concentrado, na fase de recria, apresentando média de 7,06 kg/dia, porém, quando expresso em porcentagem do peso vivo (% PV e em gramas por unidade de tamanho metabólico (g/kg0,75, estimaram-se consumos máximos de 2,59% PV e 107,32 g/kg0,75, com 42,60 e 42,52 % de concentrado, respectivamente. Na fase de engorda, os níveis de concentrado não influenciaram o consumo de MS, observando-se valores médios de 7,16 kg/dia; 1,80% PV e 80,64 g/kg0,75. O aumento do teor de proteína bruta da dieta, de 15 para 18%, elevou o consumo de MS, na fase de recria, mas não influenciou o consumo na fase de engorda. Os níveis de concentrado das dietas não influenciaram os consumos de MO, PB e NDT, nas fases de recria e engorda, cujos valores médios, expressos em kg/dia, foram 6,50; 1,18; e 5,52, respectivamente, na recria; e 6,89; 1,20; e 5,59, respectivamente, na engorda. O consumo de FDN, expresso em kg/dia e % PV, reduziu linearmente com o aumento do nível de concentrado. Os GMD, GMPCVZ, GC e CA não foram influenciados pelos níveis de concentrado da dieta, independentemente da fase estudada, cujas respectivas médias foram 1,15; 1,13 e 0,75 kg/dia e 6,29, na recria, e 1,05; 1,00 e 0,71 kg/dia e 8,02, na engorda. O teor de PB da dieta influenciou positivamente o GMD nas duas fases. A dieta com 18% de PB propiciou, aos novilhos

  6. A mutation in Na(+)-NQR uncouples electron flow from Na(+) translocation in the presence of K(+).

    Science.gov (United States)

    Shea, Michael E; Mezic, Katherine G; Juárez, Oscar; Barquera, Blanca

    2015-01-20

    The sodium-pumping NADH:ubiquinone oxidoreductase (Na(+)-NQR) is a bacterial respiratory enzyme that obtains energy from the redox reaction between NADH and ubiquinone and uses this energy to create an electrochemical Na(+) gradient across the cell membrane. A number of acidic residues in transmembrane helices have been shown to be important for Na(+) translocation. One of these, Asp-397 in the NqrB subunit, is a key residue for Na(+) uptake and binding. In this study, we show that when this residue is replaced with asparagine, the enzyme acquires a new sensitivity to K(+); in the mutant, K(+) both activates the redox reaction and uncouples it from the ion translocation reaction. In the wild-type enzyme, Na(+) (or Li(+)) accelerates turnover while K(+) alone does not activate. In the NqrB-D397N mutant, K(+) accelerates the same internal electron transfer step (2Fe-2S → FMNC) that is accelerated by Na(+). This is the same step that is inhibited in mutants in which Na(+) uptake is blocked. NqrB-D397N is able to translocate Na(+) and Li(+), but when K(+) is introduced, no ion translocation is observed, regardless of whether Na(+) or Li(+) is present. Thus, this mutant, when it turns over in the presence of K(+), is the first, and currently the only, example of an uncoupled Na(+)-NQR. The fact the redox reaction and ion pumping become decoupled from each other only in the presence of K(+) provides a switch that promises to be a useful experimental tool.

  7. Characterization and antibacterial activity of silver exchanged regenerated NaY zeolite from surfactant-modified NaY zeolite

    Energy Technology Data Exchange (ETDEWEB)

    Salim, Mashitah Mad; Malek, Nik Ahmad Nizam Nik, E-mail: niknizam@fbb.utm.my

    2016-02-01

    The antibacterial activity of regenerated NaY zeolite (thermal treatment from cetyltrimethyl ammonium bromide (CTAB)-modified NaY zeolite and pretreatment with Na ions) loaded with silver ions were examined using the broth dilution minimum inhibitory concentration (MIC) method against Escherichia coli (E. coli ATCC 11229) and Staphylococcus aureus (S. aureus ATCC 6538). X-ray diffraction (XRD), attenuated total reflectance–Fourier transform infrared (ATR–FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and chemical elemental analyses were used to characterize the regenerated NaY and AgY zeolites. The XRD patterns indicated that the calcination and addition of silver ions on regenerated NaY zeolite did not affect the structure of the regenerated NaY zeolite as the characteristic peaks of the NaY zeolite were retained, and no new peaks were observed. The regenerated AgY zeolite showed good antibacterial activity against both bacteria strains in distilled water, and the antibacterial activity of the samples increased with increasing Ag loaded on the regenerated AgY zeolite; the regenerated AgY zeolite was more effective against E. coli than S. aureus. However, the antibacterial activity of the regenerated AgY was not effective in saline solution for both bacteria. The study showed that CTAB-modified NaY zeolite materials could be regenerated to NaY zeolite using thermal treatment (550 °C, 5 h) and this material has excellent performance as an antibacterial agent after silver ions loading. - Highlights: • Thermal treatment was used to regenerate surfactant modified zeolite. • The regenerated NaY zeolite formed was added with different silver loadings. • Regenerated AgY zeolite was tested for antibacterial activity on E. coli and S. aureus. • The antibacterial activity increased with increased of the amount of silver loadings. • The zeolite structure did not change with thermal and modification

  8. Polifonia na educação: a formação docente na contemporaneidade

    OpenAIRE

    Ferreira, Luís Vicente

    2010-01-01

    Este estudo se insere na área das Ciências Sociais, concentrando-se mais especificamente em Antropologia. Tem como tema a educação permanente de educadores, em especial, os docentes da Educação Básica em serviço. Particulariza-se pela busca de compreensão das possíveis contribuições que as abordagens do Pensamento Complexo, da Multirreferencialidade e Transdisciplinaridade poderiam apontar para a construção de propostas de educação docente permanente em serviço. O texto organiza-se numa leitu...

  9. Estudo e propostas de melhoria na preparação de kits na Bosch Termotecnologia

    OpenAIRE

    Trigo, Luís Filipe Rocha

    2009-01-01

    O presente trabalho resulta de um estágio curricular desenvolvido na Bosch Termotecnologia. O objectivo deste trabalho é o estudo da preparação de kits numa área específica da Bosch Termotecnologia, baseando-se no modelo de gestão Bosch Production System, os seus princípios e elementos. Foram particularmente considerados os princípios de melhoria contínua, a metodologia 5S, os dispositivos Poka-Yoke e as ferramentas básicas da Qualidade. O conjunto de acções de melhoria propostas vis...

  10. Anomalias na velocidade de fusão do eletrodo na soldagem GMAW

    OpenAIRE

    Ronald Izidoro Reis

    2004-01-01

    A velocidade de fusão do eletrodo na soldagem GMAW com fonte de tensão constante é bem descrita por um modelo parabólico que associa a fusão do arame com o aquecimento por resistência elétrica e do arco. Entretanto, testes realizados com fonte de corrente constante indicam que a velocidade de fusão pode se desviar dos valores preditos por este modelo quando a corrente está próxima da transição globular- spray. Embora as causas dessas irregularidades não tenham ainda sido bem estabelecidas, mu...

  11. USPEH OTROK NA PLAVALNIH TEČAJIH GLEDE NA KRAJ BIVANJA

    OpenAIRE

    Monzalgi, Sara

    2014-01-01

    Diplomsko delo je razdeljeno na teoretični in empirični del. V teoretičnem delu diplomskega dela smo preučevali literaturo o plavanju in pomenu plavanja za človeka, o razvoju plavalnega opismenjevanja v Sloveniji ter pomenu plavanja za razvoj otroka. Izpostavili smo možnosti učenja plavanja v predšolskem obdobju.. Preučili smo dosedanje raziskave in ugotovitve o plavanju otrok v predšolskem obdobju. V empiričnem delu je predstavljena primerjalna raziskava o vplivu bližine kopališč kraju bivan...

  12. Protagonismo juvenil na literatura especializada e na reforma do ensino médio

    OpenAIRE

    Ferretti,Celso J.; Dagmar M. L. Zibas; Tartuce,Gisela Lobo B. P.

    2004-01-01

    O "protagonismo juvenil" tem tido ampla repercussão na área educacional, principalmente a partir da implementação da reforma curricular do ensino médio, cujas diretrizes adotam esse conceito como um dos pilares das inovações sugeridas. No entanto, o tema é sujeito a diferentes interpretações. Com a preocupação de maior precisão conceitual, este artigo recorre às definições de diversos autores como contraponto para a análise do protagonismo tal como proposto pelo documento oficial da reforma....

  13. Capsazepine, a synthetic vanilloid that converts the Na,K-ATPase to Na-ATPase

    DEFF Research Database (Denmark)

    Mahmmoud, Yasser Ahmed

    2008-01-01

    of the membrane. Kinetic analyses showed that CPZ stabilized an enzyme species that constitutively occluded K+. Low-affinity ATP interaction with the enzyme was strongly reduced following CPZ treatment; in contrast, indirectly measured interaction with ADP was much increased, which suggests that composite...... regulatory communication with nucleotides takes place during turnover. Studies with lipid vesicles revealed that CPZ reduced ATP-dependent digitoxigenin-sensitive 22Na+ influx into K+ loaded vesicles only at saturating ATP concentrations. The drug apparently abolishes the regulatory effect of ATP on the pump...

  14. O lugar dos sentimentos na Ciência do Comportamento e na Psicoterapia Comportamental

    OpenAIRE

    Carvalho, Sueli Galego de

    2009-01-01

    Este artigo mostra uma breve reflexão acerca da valorização dos sentimentos no contexto da terapia comportamental. Discute-se também algumas considerações gerais sobre as idéias de Skinner a respeito das explicações mentalistas do comportamento humano, procurando-se analisar teoricamente como os eventos “encobertos” têm sua parcela na determinação dos comportamentos expressos.Palavras-chave: sentimentos, comportamento encoberto, mentalismo, terapia comportamental cognitiva.

  15. Thermodynamics of the NaCl–KCl system

    Energy Technology Data Exchange (ETDEWEB)

    Sergeev, D., E-mail: sergeevdmn@gmail.com; Kobertz, D.; Müller, M.

    2015-04-20

    Highlights: • The complementary methods of DSC, DTA, DROP and XRD analyses were used. • The heat capacity of solid phase of the NaCl–KCl mixtures was measured. • The heat capacity of liquid phase of the 50NaCl–50KCl mixture was obtained. • The enthalpy of fusion and solid solution formation were determined. • The thermodynamic functions of the 50NaCl–50KCl mixture were calculated. - Abstract: The heat capacity of the solid phase of the NaCl–KCl mixtures was measured by the differential scanning calorimetry. These results and X-ray diffraction data were used for the explanation of the solid solution formation. The heat capacity of the liquid phase of the eutectic 50NaCl–50KCl mixture has been obtained in a closed glass container. The enthalpy increment (H{sup °}{sub T} − H{sup °}{sub 298.15}) and the fusion enthalpy of the 50NaCl–50KCl mixture have been measured by a drop calorimeter. The joint analysis of these values with the heat capacity data allowed the calculation of the enthalpy of the solid solution. As the final result, the thermodynamic functions of the eutectic 50NaCl–50KCl mixture have been obtained.

  16. Epidemiologia da raiva humana na Guanabara

    Directory of Open Access Journals (Sweden)

    Alfredo R. Matta B. da Silva

    1971-08-01

    Full Text Available A raiva humana se mantém como problema de Saúde Pública, especialmente nas áreas urbanas, onde o cão atua como principal reservatório e fonte imediata de infecção. A deficiência de programas de controle de cães vadios, de imunização sistemática e de educação sanitária, contribui para a perpetuação da cadeia epidemiológioa. O presente estudo analisa todos os casos de raiva humana, observados em habitantes do Estado da Guanabara, no período 1965-1969, segundo as variáveis: idade, sexo, côr, variação estacional, período de incubação e de duração da fase clínica, fonte de infecção, local de mordedura e uso de vacina posterior à exposição. Os principais resultados foram: 1. A ravia na Guanabara, parece ser mais comum nos grupos etários mais jovens e nos homens. 2. Não se observou variação estacional. 3. O período de incubação mediano foi de 45 dias e de duração da fase clínica de 3 dias. 4. Ocorreu uma associação entre período de incubação menor e vacinação incompleta.

  17. O Perfume ou o Ignorado na Cultura

    Directory of Open Access Journals (Sweden)

    Márcio Boaventura Jr.

    2011-05-01

    Full Text Available

    Resumo: A proposta do artigo é analisar o filme “Perfume, a história de um assassino” de Tom Tykwer sob o ponto de vista da psicanálise e da educação. Para tanto, buscamos debater o mal-estar na cultura, especialmente suas manifestações nas salas de aula, a partir dos diversos pontos do enredo em que podemos ilustrar o que Freud argumentou em sua tese sobre o tema.

     

    Resume: This article is intended to analyze Tom Tykwer's film Perfume: The Story of a Mur-derer (2006 under an educational and psychoanalytical perspective. Therefore we try to question cultural discontentment, mostly its manifestations in class, depicting the plot's many points of view to illustrate Freud thesis' arguing on the subject.

     

  18. A publicidade na perspectiva de Baudrillard

    Directory of Open Access Journals (Sweden)

    Maria Ogécia Drigo

    2009-09-01

    Full Text Available Resumo O propósito deste artigo é apresentar as idéias de Baudrillard sobre publicidade, tratadas na obra O sistema dos objetos. Assim, discutem-se os conceitos de arranjo e de ambiência que culminam no conceito de funcionalidade, os quais permitem apresentar as relações que se estabelecem entre os seres humanos, e entre eles e os objetos. Em seguida, aborda-se o papel da publicidade em meio a esses objetos/signos. Palavras-chave: Jean Baudrillard; comunicação; publicidade; funcionalidade; objetos/signos. Resumen El propósito de este artículo es presentar las ideas de Baudrillard sobre la publicidad, que constan en la obra El sistema de los objetos. Se discuten los conceptos de arreglo y de ambiencia que culminan en el concepto de funcionalidad, los cuales permiten presentar las relaciones que se establecen entre los seres humanos y entre ellos y los objetos. En seguida,se aborda el papel de la publicidad en medio de esos objetos/signos. Palabras-clave: Jean Baudrillard; comunicación; publicidad; funcionalidad; objetos/signos. Abstract This article intends to present Baudrillard’s ideas about advertising as considered in “Le système des objects”, his first book. The concepts of settlement, ambience and functionality are discussed. They make it possible to present the relations constructed among human beings and among humans and objects. We then discuss the role of advertising amongst these objects/signs. Keywords: Jean Baudrillard; communication; advertising; functionality; objects/signs.

  19. Cidade-ciborgue: a cidade na cibercultura

    Directory of Open Access Journals (Sweden)

    André Lemos

    2008-11-01

    Full Text Available As cidades contemporâneas passam por transfigurações importantes com o advento das novas tecnologias da comunicação e informação e, embora toda cidade seja um artefato complexo composto por diversas redes materiais e espirituais (Saint Simon, podemos ver as atuais cidades como uma cidade-ciborgue. O objetivo deste artigo é descrever e analisar as principais transformações pelas quais passa o espaço urbano na atual cibercultura. Torna-se urgente compreender as transformações da cidade contemporânea em meio às novas tecnologias de base micro-eletrônica e de telecomunicações. Pretendemos aqui abordar a questão das cidades da cibercultura sob o prisma do que chamaremos "cidade-ciborgue". Palavras-chave cibercultura, cibercidade, cidade, comunicação Abstract Cities have been through major transformations due to information and communication technologies. Although every city is a complex artifact made of several material and spiritual networks (Saint Simon, we can view our modern cities as cyborg-cities. The aim of this paper is to describe and analyze some major changes in the urban space in terms of cyberculture. There is a need to understand the transformations of the contemporary city in face of the new technologies of telecommunications and microelectronics. We intend to approach the subject of cities and cyberculture from the point of view of what we are calling "the cyborg-city". Key words cyberculture, cybercity, city, communication

  20. Educacão infantil na Noruega

    Directory of Open Access Journals (Sweden)

    Eulina da Rocha Lordelo

    Full Text Available Em comparação com os demais países nórdicos, a Noruega tem uma história mais recente de educação infantil. Um sistema disseminado e com forte financiamento público só se tornou disponível a partir dos anos 70. A descrição desse sistema de educação infantil contida neste artigo inclui um breve histórico, informações sobre financiamento, responsabilidades e custos, disposições legais sobre pessoal - formação necessária e condições de trabalho, bem como instalações, equipamentos e materiais. Todo o sistema é regulado por legislação nacional, preservando ampla liberdade de planejamento e ação para as próprias instituições e o pessoal envolvido. Os objetivos e metas, conteúdos e métodos, a pedagogia como idéias sustentadas e práticas assumidas constituem o foco central do artigo, especialmente a ênfase dedicada à brincadeira e ao trabalho criativo. Acompanhando o relato, o artigo propõe algumas comparações com a situação brasileira, enfatizando as diferenças legais, culturais e pedagógicas que podem ser observadas nos dois sistemas, buscando-se refletir sobre lições que podem ser extraídas e usadas na avaliação do sistema de educação infantil no Brasil.

  1. As terapias alternativas na assistência de enfermagem

    Directory of Open Access Journals (Sweden)

    Jackçon L. Savi

    1995-12-01

    Full Text Available Na seqüência do acompanhamento da disciplina "Métodos Terapêuticos Alternativos" (MTA. implantada no Curso de Graduação em Enfermagem da UFSC em 1990. focalizou-se os egressos com o objetivo de verificar a utilização das terapias alternativas na assistência de enfermagem que prestam como enfermeiros. Nenhum dos entrevistados posicionou-se contrário e a maioria confirmou utilizar uma ou mais terapias na assistência que prestam aos usuários dos serviços onde atuam.

  2. Literatura e resistência: vozes negras na literatura brasileira

    OpenAIRE

    Sarteschi, Rosangela

    2015-01-01

    Vozes negras no sistema literário brasileiro contam outras histórias, engendrando, assim, diferentes formas de compreender e elaborar o mundo a partir de novas perspectivas históricas e sociais que, ao assumir o comando e a autoria de sua própria escrita, concorrerão para o estabelecimento de um sistema literário baseado na heterogeneidade, na pluralidade e na diversidade. A presente comunicação pretende, portanto, aproximar alguns poemas de Cuti, Conceição Evaristo, Edimilson de Almeida Pere...

  3. Explora??o sexual feminina na fronteira: Brasil e Venezuela

    OpenAIRE

    Vasconcelos, Andr?a Freitas de

    2011-01-01

    O presente trabalho procurou abordar o fen?meno da Explora??o Sexual feminina na sociedade de consumo, fundamentando-se na sociologia das rela??es de g?nero, ao tomar como estudo as situa??es de explora??o sexual feminina e de prostitui??o que acontecem na fronteira Brasil/Venezuela, no per?odo compreendido entre a ?ltima d?cada (anos dois mil), aos dias atuais. O percurso te?rico conceitual adotado considera essa tem?tica um assunto relevante para o campo de estudos sociol?gicos e da din?mic...

  4. Torcicolo na Criança — Dois Casos

    OpenAIRE

    Lobarinhas, Goreti; Fonseca, António

    2014-01-01

    O torcicolo na criança é uma situação clínica relativamente frequente. É um sinal subestimado, por ser na maior parte das vezes devido a espasmo muscular idiopático.São consideradas as principais etiologias do torcicolo na criança.Como o torcicolo é habitualmente uma situação benigna, a sua persistência ou a associação a outros sinais ou sintomas deve determinar uma observação clínica mais cuidada.Os autores descrevem dois casos clínicos de torcicolo de etiologia relativamente pouco frequente...

  5. Vpliv varnostnih opozoril na varnost uporabnika informacijsko-komunikacijske tehnologije

    OpenAIRE

    Fajdiga, Sebastjan

    2016-01-01

    V teoretičnem delu diplomskega dela je opisano ozaveščanje o informacijski varnosti, njegovo stanje v Sloveniji in varnostna opozorila kot njegov del. Opisana so različna varnostna opozorila, njihov namen, učinkovitost oziroma neučinkovitost skozi zadnjih nekaj let in lažna varnostna opozorila oziroma oglasi. Predstavljena so osnovna načela, kako razviti bolj razumljiva in upoštevana varnostna opozorila. Opisani so tudi programi ozaveščanja v Sloveniji. S povečanjem kibernetske kriminalite...

  6. Inovações tecnológicas na caprinocultura

    OpenAIRE

    Teixeira, Izabelle Auxiliadora Molina [UNESP; Gomes, Rafael Aparecido [UNESP; Castagnino, Douglas Sousa [UNESP; Figueiredo, Fernanda Oliveira de Miranda [UNESP; Härter,Carla Joice; Biagioli, Bruno [UNESP; Silva, Simone Pedro da [UNESP; Rivera, Astrid Rivera

    2013-01-01

    O largo crescimento do setor de agronegócios no Brasil tem estimulado mudanças nos sistemas produtivos, tanto na intensificação, como na profissionalização da produção. Dessa forma, os produtores têm buscado estratégias para melhor atender aos desafios da atividade pecuária atual, dentre as quais se destacam as inovações tecnológicas que devem resultar em comprovado benefício à atividade, seja pelo aumento em produtividade, seja pela melhoria na qualidade dos produtos, seja pela conscientizaç...

  7. Polimorfismo na produção de medicamentos

    Directory of Open Access Journals (Sweden)

    Gabriel Lima Barros de Araujo

    2012-01-01

    Full Text Available O polimorfismo pode ocasionar desvios de qualidade durante o processo produtivo e influenciar o desempenho dos medicamentos. Por isso, o entendimento do fenômeno e suas implicações abre um campo amplo de possibilidades a serem exploradas na área farmacêutica, incluindo o surgimento de novos paradigmas e ferramentas na garantia da qualidade de medicamentos. Este trabalho apresenta uma introdução aos aspectos básicos do fenômeno do polimorfismo e suas implicações na produção e controle de medicamentos, com ênfase no polimorfismo dos fármacos.

  8. Scilla litardierei Breistr. na sjevernoj granici areala u Hrvatskoj

    OpenAIRE

    Ilijanić, Ljudevit; Hršak, Vladimir

    1990-01-01

    Vrsta Scilla litardierei Breistr. (= Sc. pratensis Waldst. et Kit., ilirski procjepak ili lučika) jedna je od onih endemičnih biljaka Jugoslavije koja je rasprostranjena na vlažnim poplavnim livadama, pretežno na krš- kim poljima, od Slovenije (gdje je nađena u novije vrijeme) preko Hrvatske, Bosne i Hercegovine do Crne Gore. Središte njezine rasprostranjenosti je u submediteranskoj Ostryo- Carpinion zoni, gdje je vrlo značajan element osobito u zajednicama sveze Molinio-Hordeion secalini ...

  9. Kulturno nasledstvo i turiz''m - za konstruiraneto na etnografskite kompleksi

    Directory of Open Access Journals (Sweden)

    Stanka Janeva

    2008-01-01

    Full Text Available (bugarski Interes''t k''m kulturnoto bogatstvo na edin narod e sred osnovnite stimuli za razvitieto na turizma. Tendencijata da se revitalizirat tradiciite na edna ili druga kultura se nabljudava v strani po celija svjat. Vse po-često dnes v procesa na homogenizacija na kulturite različnite obščnosti izobretjavat prostranstva, koito sa svoeobrazni rezervati na kulturnoto nasledstvo. Te predlagat očakvanata kulturna različnost, t''rsena predimno v edno idealizirano minalo. Reaktiviraneto mu i 'živata istorija' stavat vse po-populjarni kato načini za privličane na turistite i provokira konstruiraneto na specifični prostranstva i s''zdavaneto na novi, specialno izgradeni atrakcii. Edna ot naj- atraktivnite formi na prezentirane na kulturnoto nasledstvo e etnografskijat kompleks. .

  10. FATORES DE RISCO NA REPETIÇÃO DE GRAVIDEZ NA ADOLESCÊNCIA

    Directory of Open Access Journals (Sweden)

    Eulália Maria Chaves-Maia

    2009-01-01

    Full Text Available A fim de traçar o perfil biopsicossocial de adolescentes com repetição de gravidez e seus fatores associados, investigou-se questões socio-demográficas, variáveis biológicas e psicológicas de 50 adolescentes multigestas.Os dados analisados através de estatística descritiva apontam que a maioria das adolescentes não frequentava a escola e vivia em união estável, que 54% não fez uso de métodos contraceptivos na primeira relação sexual e 88% nunca participou dos programas de Planejamento Familiar. Assim, políticas públicas de educação sexual e reprodutiva devem identificar comportamentos sexuais de risco, atuar na construção de valores familiares e no planejamento das gestações.

  11. A implicação do pesquisador na pesquisa interacionista na escola

    Directory of Open Access Journals (Sweden)

    Ruth Bernardes de Sant’Ana

    2010-08-01

    Full Text Available Toda pesquisa de campo é participante, mas com graus diferentes de participação dos sujeitos no universo pesquisado, pois, mesmo naquela baseada em contrato deliberado de não intervenção, a relação intersubjetiva pesquisador-pesquisado produz sempre alguma interferência no processo investigativo. Este artigo retoma essa discussão, sobretudo com base nas teorias de implicação pesquisador-pesquisado de Barbier e Lapassade, em diálogo com a perspectiva interacionista de Mead, Berger & Luckmann e Goffman. Para tal, remete à análise da implicação, que consiste em interpretar como o pesquisador reage aos elementos conscientes e inconscientes, presentes no jogo interacional em que se encontra envolvido durante a sua permanência na pesquisa de campo, o que afeta, em maior ou menor grau, o processo de investigação. O tema ganhou impulso nos anos 60 do século XX, mas não se esgotou; razão pela qual está sendo problematizado aqui, com ênfase na observação do cotidiano escolar.

  12. Robust NaO2 Electrochemistry in Aprotic Na-O2 Batteries Employing Ethereal Electrolytes with a Protic Additive.

    Science.gov (United States)

    Abate, Iwnetim I; Thompson, Leslie E; Kim, Ho-Cheol; Aetukuri, Nagaphani B

    2016-06-16

    Aprotic metal-oxygen batteries, such as Li-O2 and Na-O2 batteries, are of topical research interest as high specific energy alternatives to state-of-the-art Li-ion batteries. In particular, Na-O2 batteries with NaO2 as the discharge product offer higher practical specific energy with better rechargeability and round-trip energy efficiency when compared to Li-O2 batteries. In this work, we show that the electrochemical deposition and dissolution of NaO2 in Na-O2 batteries is unperturbed by trace water impurities in Na-O2 battery electrolytes, which is desirable for practical battery applications. We find no evidence for the formation of other discharge products such as Na2O2·H2O. Furthermore, the electrochemical efficiency during charge remains near ideal in the presence of trace water in electrolytes. Although sodium anodes react with trace water leading to the formation of a high-impedance solid electrolyte interphase, the increase in discharge overpotential is only ∼100 mV when compared to cells employing nominally anhydrous electrolytes.

  13. (−)-Englerin A-evoked Cytotoxicity Is Mediated by Na+ Influx and Counteracted by Na+/K+-ATPase*

    Science.gov (United States)

    Ludlow, Melanie J.; Gaunt, Hannah J.; Rubaiy, Hussein N.; Musialowski, Katie E.; Blythe, Nicola M.; Vasudev, Naveen S.; Muraki, Katsuhiko; Beech, David J.

    2017-01-01

    (−)-Englerin A ((−)-EA) has a rapid and potent cytotoxic effect on several types of cancer cell that is mediated by plasma membrane ion channels containing transient receptor potential canonical 4 (TRPC4) protein. Because these channels are Ca2+-permeable, it was initially thought that the cytotoxicity arose as a consequence of Ca2+ overload. Here we show that this is not the case and that the effect of (−)-EA is mediated by a heteromer of TRPC4 and TRPC1 proteins. Both TRPC4 and TRPC1 were required for (−)-EA cytotoxicity; however, although TRPC4 was necessary for the (−)-EA-evoked Ca2+ elevation, TRPC1 was not. TRPC1 either had no role or was a negative regulator of Ca2+ entry. By contrast, both TRPC4 and TRPC1 were necessary for monovalent cation entry evoked by (−)-EA, and (−)-EA-evoked cell death was dependent upon entry of the monovalent cation Na+. We therefore hypothesized that Na+/K+-ATPase might act protectively by counteracting the Na+ load resulting from sustained Na+ entry. Indeed, inhibition of Na+/K+-ATPase by ouabain potently and strongly increased (−)-EA-evoked cytotoxicity. The data suggest that (−)-EA achieves cancer cell cytotoxicity by inducing sustained Na+ entry through heteromeric TRPC1/TRPC4 channels and that the cytotoxic effect of (−)-EA can be potentiated by Na+/K+-ATPase inhibition. PMID:27875305

  14. Hole Doping Effects on Spin-gapped Na2Cu2TeO6 via Topochemical Na Deficiency

    Science.gov (United States)

    Morimoto, Kumiko; Itoh, Yutaka; Yoshimura, Kazuyoshi; Kato, Masaki; Hirota, Ken

    2006-08-01

    We report the magnetic susceptibility and NMR studies of a spin-gapped layered compound Na2Cu2TeO6 (the spin gap Δ˜ 250 K), the hole doping effect on the Cu2TeO6 plane via a topochemical Na deficiency by soft chemical treatment, and the static spin vacancy effect by nonmagnetic impurity Zn substitution for Cu. A finite Knight shift at the 125Te site was observed for pure Na2Cu2TeO6. The negative hyperfine coupling constant 125Atr is an evidence for the existence of a superexchange pathway of the Cu-O-Te-O-Cu bond. It turned out that both the Na deficiency and Zn impurities induce a Curie-type magnetism in the uniform spin susceptibility in an external magnetic field of 1 T, but only the Zn impurities enhance the low-temperature 23Na nuclear spin-lattice relaxation rate whereas the Na deficiency suppresses it. A spin glass behavior was observed for the Na-deficient samples but not for the Zn-substituted samples. The dynamics of the unpaired moments of the doped holes are different from that of the spin vacancy in the spin-gapped Cu2TeO6 planes.

  15. Characterization and antibacterial activity of silver exchanged regenerated NaY zeolite from surfactant-modified NaY zeolite.

    Science.gov (United States)

    Salim, Mashitah Mad; Malek, Nik Ahmad Nizam Nik

    2016-02-01

    The antibacterial activity of regenerated NaY zeolite (thermal treatment from cetyltrimethyl ammonium bromide (CTAB)-modified NaY zeolite and pretreatment with Na ions) loaded with silver ions were examined using the broth dilution minimum inhibitory concentration (MIC) method against Escherichia coli (E. coli ATCC 11229) and Staphylococcus aureus (S. aureus ATCC 6538). X-ray diffraction (XRD), attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and chemical elemental analyses were used to characterize the regenerated NaY and AgY zeolites. The XRD patterns indicated that the calcination and addition of silver ions on regenerated NaY zeolite did not affect the structure of the regenerated NaY zeolite as the characteristic peaks of the NaY zeolite were retained, and no new peaks were observed. The regenerated AgY zeolite showed good antibacterial activity against both bacteria strains in distilled water, and the antibacterial activity of the samples increased with increasing Ag loaded on the regenerated AgY zeolite; the regenerated AgY zeolite was more effective against E. coli than S. aureus. However, the antibacterial activity of the regenerated AgY was not effective in saline solution for both bacteria. The study showed that CTAB-modified NaY zeolite materials could be regenerated to NaY zeolite using thermal treatment (550°C, 5h) and this material has excellent performance as an antibacterial agent after silver ions loading.

  16. Determinants of substrate and cation transport in the human Na+/dicarboxylate cotransporter NaDC3.

    Science.gov (United States)

    Schlessinger, Avner; Sun, Nina N; Colas, Claire; Pajor, Ana M

    2014-06-13

    Metabolic intermediates, such as succinate and citrate, regulate important processes ranging from energy metabolism to fatty acid synthesis. Cytosolic concentrations of these metabolites are controlled, in part, by members of the SLC13 gene family. The molecular mechanism underlying Na(+)-coupled di- and tricarboxylate transport by this family is understood poorly. The human Na(+)/dicarboxylate cotransporter NaDC3 (SLC13A3) is found in various tissues, including the kidney, liver, and brain. In addition to citric acid cycle intermediates such as α-ketoglutarate and succinate, NaDC3 transports other compounds into cells, including N-acetyl aspartate, mercaptosuccinate, and glutathione, in keeping with its dual roles in cell nutrition and detoxification. In this study, we construct a homology structural model of NaDC3 on the basis of the structure of the Vibrio cholerae homolog vcINDY. Our computations are followed by experimental testing of the predicted NaDC3 structure and mode of interaction with various substrates. The results of this study show that the substrate and cation binding domains of NaDC3 are composed of residues in the opposing hairpin loops and unwound portions of adjacent helices. Furthermore, these results provide a possible explanation for the differential substrate specificity among dicarboxylate transporters that underpin their diverse biological roles in metabolism and detoxification. The structural model of NaDC3 provides a framework for understanding substrate selectivity and the Na(+)-coupled anion transport mechanism by the human SLC13 family and other key solute carrier transporters.

  17. Down-Regulation of the Na+-Coupled Phosphate Transporter NaPi-IIa by AMP-Activated Protein Kinase

    Directory of Open Access Journals (Sweden)

    Miribane Dërmaku-Sopjani

    2013-11-01

    Full Text Available Background/Aims: The Na+-coupled phosphate transporter NaPi-IIa is the main carrier accomplishing renal tubular phosphate reabsorption. It is driven by the electrochemical Na+ gradient across the apical cell membrane, which is maintained by Na+ extrusion across the basolateral cell membrane through the Na+/K+ ATPase. The operation of NaPi-IIa thus requires energy in order to avoid cellular Na+ accumulation and K+ loss with eventual decrease of cell membrane potential, Cl- entry and cell swelling. Upon energy depletion, early inhibition of Na+-coupled transport processes may delay cell swelling and thus foster cell survival. Energy depletion is sensed by the AMP-activated protein kinase (AMPK, a serine/threonine kinase stimulating several cellular mechanisms increasing energy production and limiting energy utilization. The present study explored whether AMPK influences the activity of NAPi-IIa. Methods: cRNA encoding NAPi-IIa was injected into Xenopus oocytes with or without additional expression of wild-type AMPK (AMPKα1-HA+AMPKβ1-Flag+AMPKγ1-HA, of inactive AMPKαK45R (AMPKα1K45R+AMPKβ1-Flag+AMPKγ1-HA or of constitutively active AMPKγR70Q (AMPKα1-HA+AMPKβ1-Flag+AMPKγ1R70Q. NaPi-IIa activity was estimated from phosphate-induced current in dual electrode voltage clamp experiments. Results: In NaPi-IIa-expressing, but not in water-injected Xenopus oocytes, the addition of phosphate (1 mM to the extracellular bath solution generated a current (Ip, which was significantly decreased by coexpression of wild-type AMPK and of AMPKγR70Q but not of AMPKαK45R. The phosphate-induced current in NaPi-IIa- and AMPK-expressing Xenopus ooocytes was significantly increased by AMPK inhibitor Compound C (20 µM. Kinetic analysis revealed that AMPK significantly decreased the maximal transport rate. Conclusion: The AMP-activated protein kinase AMPK is a powerful regulator of NaPi-IIa and thus of renal tubular phosphate transport.

  18. QUANDO FOGEM DE MIM NA ESCOLA…

    Directory of Open Access Journals (Sweden)

    Cristina Madureira

    2016-07-01

    Full Text Available Introdução: A Displasia Craniofrontonasal (CFND é uma doença rara ligada ao X, caracterizada por malformações cra- niofaciais graves, paradoxalmente associada a fenótipos mais exuberantes no sexo feminino. Caso Clínico: sexo feminino, pais jovens não consanguí- neos e sem antecedentes familiares relevantes, orientada para a consulta de Pediatria por malformações craniofaciais. Apre- sentava craniossinostose coronal com assimetria craniofacial e braquiturricefalia, fronte alta, larga e proeminente, hipertelorismo acentuado, ponta nasal bífida e baixa implantação dos pavilhões auriculares. Evidência de clinodactilia do 5º dedo e háluces lar- gos. O estudo genético identificou uma mutação frameshift no gene EFBN1 no cromossoma X, confirmando o diagnóstico de CFND. O estudo genético dos pais foi normal (mutação de novo. Foi orientada para a consulta de Genética Médica e de Cirurgia Plástica (rinoplastia e várias cirurgias de correção de hipertelorismo. O desenvolvimento psicomotor foi adequado e após ingresso no 1º ciclo verificaram-se dificuldades na adaptação escolar e relação com os pares, com aproveitamento satisfató- rio. A avaliação psicológica revelou baixa autoestima, ansiedade face à exposição social e dificuldade em lidar com a frustração. Atualmente apresenta dismorfias faciais com correção parcial, escoliose ligeira e miopia/astigmatismo, mantendo seguimento multidisciplinar. Comentários: Os autores pretendem alertar para a existência desta síndrome genética, assim como realçar a necessida- de de uma abordagem multidisciplinar destes casos. A par do tratamento cirúrgico, é fundamental o aconselhamento genético e o acompanhamento psicológico destas doentes, pela baixa autoestima e pelo risco de exclusão social associados a esta síndrome.

  19. O Telemarketing Ativo na Perspectiva do Consumidor

    Directory of Open Access Journals (Sweden)

    Tiago Savi Mondo

    2010-03-01

    Full Text Available A importância dos call-centers como forma de comunicação de marketing e a sua expansão no mercado conduziram à necessidade de se investigar o telemarketing à luz da percepção dos consumidores. Sendo assim, o objetivo do presente estudo é identificar a percepção dos consumidores finais de Florianópolis quanto aos serviços de comunicação do telemarketing ativo. Utilizou-se como referencial teórico abordagens sobre o marketing direto e características e propriedades do telemarketing ativo. A pesquisa caracteriza-se por ser de natureza exploratória, quantitativa do tipo survey. A amostra foi de 400 pessoas residentes na cidade de Florianópolis e o instrumento utilizado foi o questionário. Utilizaram-se procedimentos de estatística descritiva e análise de conteúdo para inferência e análise dos dados.Os resultados demonstram que os respondentes não gostam desse tipo de abordagem. Os motivos alegados por eles para não gostarem da abordagem foram: não concordância em receber contatos com objetivos de divulgação, venda ou pesquisa; falta de necessidade do produto oferecido ou de interesse por ele; sentimento de invasão com esse tipo de abordagem; indisponibilidade para atender a telefonemas com tais intenções; falta de tempo para ocuparem-se desses assuntos; falta de confiança e credibilidade para efetuar compras de produtos e serviços pelo telefone, além da percepção de perigo nesse tipo de transação. Sugestões gerenciais são apresentadas nas conclusões do artigo. DOI: 10.5585/remark.v8i2.2135

  20. VPLIV TEHNOLOGIJE WEB 2.0 NA POSLOVANJE PODJETJA

    OpenAIRE

    Šuhel, Peter

    2009-01-01

    Diplomska naloga opisuje uporabo Web 2.0 tehnologij v podjetjih. Tehnologija Web 2.0 je na spletu že zelo razširjena, praktično so vse najbolj popularne storitve na internetu sestavljene iz Web 2.0 tehnologije. Vendar ta tehnologija še ni močno razširjena v podjetjih, kjer se je izkazala za zelo uporaben in učinkovit način prenosa, beleženja in pisanja informacij. Zaradi uspešnosti te tehnologije v podjetjih, ki so vpeljala E2.0, je smotrno raziskati ta nov način uporabe programske opreme v p...

  1. Na+ Recirculation and Isosmotic Transport

    DEFF Research Database (Denmark)

    Larsen, Erik Hviid; Møbjerg, N

    2006-01-01

    in proximal tubule of AQP1 (-/-) mice, and the inverse relationship between hydraulic permeability and the concentration difference needed to reverse transepithelial water flow. The model reproduces the volume responses of cells and lateral intercellular space (lis) following replacement of luminal Na......Cl by sucrose as well as the linear dependence of volume absorption on luminal NaCl concentration. Analysis of solvent drag on Na(+) in tight junctions provides explanation for the surprisingly high metabolic efficiency of Na(+) reabsorption. The model predicts and explains low metabolic efficiency in diluted...... external baths. Hyperosmolarity of lis is governed by the hydraulic permeability of the apical plasma membrane and tight junction with 6-7 mOsm in small intestine and

  2. Rechargeable Room-Temperature Na-CO2 Batteries.

    Science.gov (United States)

    Hu, Xiaofei; Sun, Jianchao; Li, Zifan; Zhao, Qing; Chen, Chengcheng; Chen, Jun

    2016-05-23

    Developing rechargeable Na-CO2 batteries is significant for energy conversion and utilization of CO2 . However, the reported batteries in pure CO2 atmosphere are non-rechargeable with limited discharge capacity of 200 mAh g(-1) . Herein, we realized the rechargeability of a Na-CO2 battery, with the proposed and demonstrated reversible reaction of 3 CO2 +4 Na↔2 Na2 CO3 +C. The battery consists of a Na anode, an ether-based electrolyte, and a designed cathode with electrolyte-treated multi-wall carbon nanotubes, and shows reversible capacity of 60000 mAh g(-1) at 1 A g(-1) (≈1000 Wh kg(-1) ) and runs for 200 cycles with controlled capacity of 2000 mAh g(-1) at charge voltage CO2 .

  3. O DESEMPREGO NO BRASIL NA DÉCADA DE 1990

    Directory of Open Access Journals (Sweden)

    Lucia Cortes da Costa

    2005-01-01

    Full Text Available O desemprego é um fenômeno presente na sociedade capitalista, com conseqüências na esfera social e econômica, afetando a vida dos trabalhadores. O Brasil na década de 1990 passou a conviver com taxas elevadas de desemprego aberto em decorrência da política econômica adotada no período, marcada por uma tendência liberal de abertura da economia. O segmento juvenil foi o mais afetado pelo desemprego, devido ao acirramento da concorrência no mercado de trabalho pelas vagas existentes dada a dificuldade para a criação de novos postos de trabalho na economia.

  4. O, Na, Ba and Eu abundance patterns in open clusters

    CERN Document Server

    MacLean, B T; Lattanzio, J

    2014-01-01

    Open clusters are historically regarded as single-aged stellar populations representative of star formation within the Galactic disk. Recent literature has questioned this view, based on discrepant Na abundances relative to the field, and concerns about the longevity of bound clusters contributing to a selection bias: perhaps long-lived open clusters are chemically different to the star formation events that contributed to the Galactic disk. We explore a large sample of high resolution Na, O, Ba & Eu abundances from the literature, homogenized as much as reasonable including accounting for NLTE effects, variations in analysis and choice of spectral lines. Compared to a template globular cluster and representative field stars, we find no significant abundance trends, confirming that the process producing the Na-O anti-correlation in globular clusters is not present in open clusters. Furthermore, previously reported Na-enhancement of open clusters is found to be an artefact of NLTE effects, with the open cl...

  5. Fiebre del oro blanco: la cocaína

    Directory of Open Access Journals (Sweden)

    Iván Marín Argüello

    1999-12-01

    Full Text Available La planta de coca, Erythroxylon coca es cultivada en la zona occidental de América del Sur exigiendo condiciones de suelo muy particulares. La mezcla de las hojas de cocaína con sustancias químicas origina un polvo cristalino blanco, conocido comúnmente como cocaína. Al producto obtenido del tratamiento de la cocaína con solventes se le denomina crack. El consumo de cocaína, las formas de administración más diversas y el estado fisiológico logrado por los usuarios, es denominado flash 0 high Los efectos neuro-fisiológicos son muy variados, provocando sobre todo un fuerte estímulo al Sistema Nervioso Central (SNC, producto de la liberación de dopamina en las terminaciones nerviosas.

  6. Two Na+ and Cl- Hyperaccumulators of the Chenopodiaceae

    Institute of Scientific and Technical Information of China (English)

    Ke-Fu ZHAO; Hai FAN; Jie SONG; Ming-Xia SUN; Bao-Zeng WANG; Sheng-Qiang ZHANG; I. A. UNGAR

    2005-01-01

    The authors found five sodium (Na+) and chloride (Cl-) hyperaccumulating halophytes in the Temperate Desert of Xinjiang, China and studied two of them (Suaeda salsa (L.) Pall. and Kalidium folium (Pall.) Moq.). K. folium and S. salsa had a NaCl content of 32.1% and 29.8%, respectively, on a dry weight basis. X-ray microanalysis of the Na+ in the vacuole, apoplasts and cytoplasm of the two plants indicated a ratio of 7.3:5.6:1.0 in K. folium and 7.3:6.6:1.0 in S. salsa. These data show that K. folium and S. salsa both have a high Na+ and Cl-accumulating capacity, which is related to high activity oftonoplast H+-ATPase and H+-PPase.

  7. Hiperhomocisteinemia na insuficiência renal crônica

    OpenAIRE

    Nerbass, Fabiana Baggio [UNIFESP; Draibe,Sérgio Antonio; Cuppari, Lilian [UNIFESP

    2005-01-01

    A homocisteína é um aminoácido sulfurado proveniente do metabolismo da metionina, cujo acúmulo anormal no plasma é um fator de risco para doenças vasculares, tanto na população em geral como nos pacientes com insuficiência renal crônica. Nestes, a prevalência de indivíduos com hiperhomocisteinemia é bastante elevada, mesmo na fase não dialítica da doença, em que a função renal está diminuída, mas ainda não é necessário tratamento dialítico. O principal fator que parece estar implicado na elev...

  8. Na2MoO2As2O7

    Directory of Open Access Journals (Sweden)

    Raja Jouini

    2012-12-01

    Full Text Available Disodium molybdenum dioxide diarsenate, Na2MoO2As2O7, has been synthesized by a solid-state reaction. The structure is built up from MoAs2O12 linear units sharing corners to form a three-dimensional framework containing tunnels running along the a-axis direction in which the Na+ cations are located. In this framework, the AsV atoms are tetrahedrally coordinated and form an As2O7 group. The MoVI atom is displaced from the center of an octahedron of O atoms. Two Na+ cations are disordered about inversion centres. Structural relationships between different compounds: A2MoO2As2O7 (A = K, Rb, AMOP2O7 (A = Na, K, Rb; M = Mo, Nb and MoP2O7 are discussed.

  9. Kaj Franck - täna / Piret Veigel

    Index Scriptorium Estoniae

    Veigel, Piret, 1961-

    2004-01-01

    Kaasaegse soome disaini näitus "Kaj Franck - täna" Eesti Tarbekunsti- ja Disainimuuseumis. Kaj Franci loomingu kõrval eksponeeritakse temanimelise disainipreemiaga auhinnatud kujundajate ja noorte soome disainerite töid. Loetletud 18 osalejat

  10. Lattice sites of Na dopants in ZnO

    CERN Document Server

    AUTHOR|(CDS)2069243; Martins Correia, Joao; Amorim, Lígia; Decoster, Stefan; Ribeiro da Silva, Manuel; Da Costa Pereira, Lino Miguel

    2016-01-01

    The angular distribution of beta− particles emitted by the radioactive isotope 24Na was monitored following implantation into ZnO single crystals at fluences above 5E12 cm−2 at CERN’s ISOLDE facility. We identified sodium on two distinct sites: on substitutional Zn sites and on interstitial sites that are close to the so-called octahedral site. The interstitial Na was to large extent converted to substitutional Na already for annealing at 200°C, from which an activation energy of 0.8−1.3 eV, most likely around 1.2 eV, is estimated for the migration of interstitial Na in ZnO.

  11. Initial atmospheric corrosion of Zinc sprayed with NaCl

    Institute of Scientific and Technical Information of China (English)

    屈庆; 严川伟; 张蕾; 刘光恒; 曹楚南

    2003-01-01

    Regularities of the initial atmospheric corrosion of zinc sprayed with different amount of NaCl exposed to air at 80% relative humidity and 25 ℃ were investigated via quartz crystal microbalance in laboratory. The results show that NaCl can accelerate the corrosion of zinc. Mass gain of zinc increases with the exposure time increasing, which can be correlated by using exponential decay function. The relationship between mass gain and amount of NaCl sprayed at a certain exposure time follows a quadratic function. Meanwhile, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and electron dispersion X-ray analysis were used to characterize the corrosion surface and products. Zn5(OH)8Cl2*H2O and ZnO are the dominant corrosion products, which unevenly distribute on the surface of zinc in the presence of NaCl. A probable mechanism is simply presented to explain the experimental results.

  12. Lattice sites of Na dopants in ZnO

    Science.gov (United States)

    Wahl, U.; Correia, J. G.; Amorim, L.; Decoster, S.; da Silva, M. R.; Pereira, L. M. C.

    2016-09-01

    The angular distribution of β - particles emitted by the radioactive isotope 24Na was monitored following implantation into ZnO single crystals at fluences above 5 × 1012 cm-2 at CERN’s ISOLDE facility. We identified sodium on two distinct sites: on substitutional Zn sites and on interstitial sites that are close to the so-called octahedral site. The interstitial Na was to a large extent already converted to substitutional Na for annealing at 200 °C, from which an activation energy of 0.8-1.3 eV, most likely around 1.2 eV, is estimated for the migration of interstitial Na in ZnO.

  13. The Electrogenic Na+/HCO3- Cotransporter, NBC

    Directory of Open Access Journals (Sweden)

    Romero MF

    2001-07-01

    Full Text Available Electrogenic Na(+/HCO(3(- (NBC function has been characterized in many mammalian tissues including, kidney, pancreas, and brain. Cloning efforts identified a single cDNA, NBC/NBC1, that possesses all the functional attributes of the electrogenic Na(+/HCO(3(- cotransporter. This NBC clone is related to the anion exchangers and thus forms a bicarbonate transporter superfamily. Presently two N-terminal and one C-terminal isoforms are known. All three isoforms appear to arise from the same gene and seem to have identical function. NBC antibodies have localized NBC isoforms in kidney, pancreas, brain, small intestine, colon, epididymis, eye, heart, liver, salivary glands, stomach, and testis. Functionally, NBC appears HCO(3(- and Na(+ selective. NBC stoichiometry in Xenopus oocytes is 1 Na(+ : 2 HCO(3(-, implicating a possible accessory protein interaction.

  14. The far-wing broadening of the Na D lines by K, Rb and Cs and the electrostatic interaction potentials of the NaK, NaRb and NaCs molecules

    Science.gov (United States)

    Vadla, C.; Niemax, K.

    1984-10-01

    The far wings of the Na D lines broadened by K, Rb and Cs have been measured in absorption by scanning a single-mode dye laser across the lines and detecting the flourescence signal. The relative absorption coefficients for the NaRb and NaCs are normalized using the impact widths recently measured by Kamke et al. The found red asymmetries of the lines are surprising results when only the theoretical van der Waals interactions are taken into account. It is demonstrated that the addition of dipole-quadrupole forces is necessary to explain the experimental findings. Using the extended electrostatic interaction potentials the theoretical impact widths of the Na D lines by Rb were found to be in agreement with the experimental data of Kamke et al.

  15. A iluminação na tipologia hotel

    OpenAIRE

    Clarissa Martins de Lucena Santafe Aguiar

    1998-01-01

    Conforto ambiental e conservação de energia aplicados à iluminação são conceitos ainda desconhecidos na maioria dos exemplares da tipologia hotel no Brasil. Conservar energia, implica na transformação da sociedade do desperdício em direção a uma sociedade mais racional na utilização de seus recursos naturais. A luz atua como elemento de composição arquitetõnica e como tal, é parceira na qualificação e comercialização dos ambientes do hotel. A dissertação analisa critérios e tendências do sist...

  16. (IMobilidade na cidade de São Paulo

    Directory of Open Access Journals (Sweden)

    Raquel Rolnik

    2011-04-01

    Full Text Available O trabalho procura deslindar a crise da mobilidade que a metrópole paulistana tem vivido na última década. Para tanto, apresenta uma análise crítica acerca dos projetos de mobilidade que foram implantados historicamente na cidade de São Paulo, focalizando em particular os investimentos e as mudanças na gestão realizados pelos poderes públicos municipal e estadual em infraestrutura viária e transporte coletivo na última década.This paper seeks to understand the mobility crisis lived by São Paulo in the last decade. The study presents a historical and critical analysis of the mobility projects which has been implemented in the city, with particular focus on the investments and projects implemented by state and local governments in road infrastructure and public transportation in the last decade.

  17. Experimental Observation of Laser Control: Electronic Branching in the Photodissociation of Na2

    Science.gov (United States)

    Shnitman, A.; Sofer, I.; Golub, I.; Yogev, A.; Shapiro, M.; Chen, Z.; Brumer, P.

    1996-04-01

    Control over the product branching ratio in the photodissociation of Na2 into Na\\(3s\\)+Na\\(3p\\) and Na\\(3s\\)+Na\\(3d\\) is demonstrated using a two-photon incoherent interference control scenario. Ordinary pulsed nanosecond lasers are used and Na2 is at thermal equilibrium in a heat pipe. Results show a depletion in the Na\\(3d\\) product of at least 25% and a concomitant increase in the Na\\(3p\\) yield as the relative frequency of the two lasers is scanned.

  18. A Comparative Investigation on the JT Effect in Triangular Compounds of NaMnO2, NaNiO2 and NaTiO2

    Institute of Scientific and Technical Information of China (English)

    OUYANG Sheng-De; QUAN Ya-Min; LIU Da-Yong; ZOU Liang-Jian

    2011-01-01

    We present a study on the Jahn-Teller (JT) distortions of the TiOe, NiO6 and MnOe complexes in NaTiO2, NaNiO2 and NaMnO2 triangular compounds with a C2/m structure. The JT vibronic normal modes are found to be Q3, Q'4 and Q6 by the group symmetry on the C2/m. Structure. The magnitude of the normal coordinates (Q3, Q4, Qe) and the structural parameters of distorted octahedra Moe (M=Ti, Ni, Mn) are obtained and in good agreement with experimental data. The energy level splitting of 3d orbitals and the highest occupied molecular orbital (HOMO) character in the Moq complex are also calculated in accordance with the JT distortions. These results provide a first insight into the groundstate and magnetic properties of distorted triangular compounds AMO2.%@@ We present a study on the Jahn-Teller (JT) distortions of the TiO, NiO and MnO complexes in NaTiO, NaNiO and NaMnO triangular compounds with a C structure.The JT vibronic normal modes are found to be Q, Q' and Q by the group symmetry on the C structure.The magnitude of the normal coordinates (Q, Q', Q) and the structural parameters of distorted octahedra MO (M=Ti, Ni, Mn) are obtained and in good agreement with experimental data.The energy level splitting of 3d orbitals and the highest occupied molecular orbital (HOMO) character in the MO complex are also calculated in accordance with the JT distortions.These results provide a first insight into the groundstate and magnetic properties of distorted triangular compounds AMO.

  19. A Theoretical Study of Photoabsorption Cross Sections of Na2+

    Institute of Scientific and Technical Information of China (English)

    ZHANG Wei-Hua; GAO Xiang; HAN Xiao-Ying; LI Jia-Ming

    2007-01-01

    @@ In the framework of quantum defect theory, we calculate photoabsorption cross sections of Na2+. Based on our calculations, there is an absorption window in the photoabsorption cross sections of Na2+, and more than one bump above the absorption window. The calculated photoabsorption cross sections provide an explanation for the abnormal bump in the experimental measurements of Hudson, which is a long-standing experimental puzzle.

  20. Radioprotective effects of ON 01210.Na upon oral administration.

    Science.gov (United States)

    Suman, Shubhankar; Datta, Kamal; Doiron, Kathryn; Ren, Chen; Kumar, Ramesh; Taft, David R; Fornace, Albert J; Maniar, Manoj

    2012-01-01

    ON 01210.Na (Ex-RAD), a chlorobenzylsulfone derivative was investigated for its pharmacologic and radioprotective properties when administered via oral and subcutaneous (SC) routes. The goals of the study were to assess the comparative bioavailability of ON 01210.Na when administered by oral versus SC routes and to demonstrate that the oral drug delivery of ON 01210.Na afforded survival advantage similar to SC dosing. Pharmacokinetics was studied after two doses, 24 h apart, of ON 01210.Na (500 mg/kg) administered to male C3H/Hen mice (7-9 weeks) via SC injection or oral route. The dose response (100 to 750 mg/kg) and survival advantage of ON 01210.Na administered at 24 h and 15 min prior to 7.5 or 8 Gy whole body irradiation from a ¹³⁷Cs source (dose rate 1 Gy/min) were studied in these mice. Effects on the hematopoietic system were investigated by complete blood count and granulocyte-macrophage colony forming unit assay. A significant survival advantage and hematopoietic protection were observed after prophylactic oral ON 01210.Na and results were comparable to SC administration. These findings correlated well with pharmacokinetic data. Both SC and oral ON 01210.Na showed significant survival advantage against radiation toxicity and ON 01210.Na mediated hematopoietic protection plays key role in enhanced survival of mice. Oral administration holds better clinical promise as an effective countermeasure not only for early-responders in a nuclear accident, but also for the at-risk civilian population.

  1. A NOVA ERA NA IGREJA CATÓLICA

    Directory of Open Access Journals (Sweden)

    João Lupi

    2012-09-01

    Full Text Available O presente artigo foi apresentado na Mesa Redonda “Religiões e Religiosidades: entre a norma e o vivido (tensões e conciliações”, integrando o III Encontro do GT Nacional de História das Religiões e Religiosidades – ANPUH, na Universidade Federal de Santa Catarina (UFSC de 20 a 22 de Outubro de 2010.

  2. Naši suvelaagris mõnitatakse Eesti presidenti

    Index Scriptorium Estoniae

    2008-01-01

    Loode-Venemaale Tveri oblastisse suvelaagrisse kogunenud noorteliikumise Naši liikmed kutsuvad seal elavat siga Toomas Hendrik Ilveseks. Info pärineb Matt Siegeli pikemast artiklist "Nashi Summer Camp Tries a New Message", mis ilmus ajalehes The Moscow Times 21. juulil 2008. Ilmunud ka: Virumaa Teataja 22. juuli 2008, lk. 4, pealk.: Eesti presidenti mõnitati Naši suvelaagris; Eesti Elu 25. juuli 2008, lk. 3

  3. PLANIRANJE IN RAZVOJ KADROV NA MINISTRSTVU ZA ZUNANJE ZADEVE

    OpenAIRE

    2012-01-01

    Diplomsko delo predstavlja planiranje in razvoj kadrov na Ministrstvu za zunanje zadeve. V prvem, teoretičnem delu smo se seznanili s kadrovsko politiko, njenimi načeli in cilji, definirali pojem kadrovska funkcija ter njene naloge. V nadaljevanju smo podrobneje opisali planiranje kadrov, ki je nujnost za sodobno organizacijo, saj so plani kadrov pomembno sredstvo za stabilno poslovanje in iskanje odgovorov, kaj je potrebno opraviti, da bi organizacija dosegla cilje, kdaj in kako ter katere v...

  4. Custo de oportunidade: oculto na contabilidade, nebuloso na mente dos contadores

    Directory of Open Access Journals (Sweden)

    André Moura Cintra Goulart

    2002-12-01

    Full Text Available Este trabalho tem como objetivo desenvolver uma reflexão sobre o custo de oportunidade, buscandose constituir uma base adequada para a identificação de possíveis deficiências de conhecimento do referido conceito por parte dos profissionais da área contábil. Considerando-se sua relevância e grande potencial de aplicação nas atividades empresariais, como na avaliação de resultados, entende-se como fundamental a existência de compreensão sobre o custo de oportunidade e suas aplicações. Pesquisa exploratória realizada indica a validade da hipótese estabelecida, de que os profissionais da área contábil detêm conhecimento insatisfatório sobre o conceito objeto deste estudo. Assim, evidencia-se a necessidade de que mais atenção seja dada ao custo de oportunidade no processo de formação dos profissionais da contabilidade. Espera-se que estes profissionais, com segurança conceitual, estejam em condições de colaborar ativamente com o aproveitamento do custo de oportunidade em suas diversas aplicações, seja na contabilidade societária ou na gerencial, com benefícios para os usuários das informações contábeis.The objective of this article is to develop a reflection about opportunity cost, seeking to establish an adequate basis for the identification of possible knowledge deficiencies in the accounting professionals. Considering its relevance and great potential for application in business activities, such as performance assessment, it is observed that understanding the opportunity cost concept and its applications is fundamental.The exploratory research realized indicates the validity of the hypothesis that guides the development of the work, namely, that the accounting professionals possess unsatisfactory knowledge about the concept that is the object of this study. Thus, the need is highlighted to give more attention to opportunity cost in the educational process of the professionals. It is expected that these

  5. Exercicio Aerobio Intervalado Induz Maior Reducao na Sobrecarga Cardiaca na Recuperacao em Ratos

    Directory of Open Access Journals (Sweden)

    Juliana Pereira Borges

    2014-01-01

    Full Text Available Fundamento: O treinamento aeróbio intervalado produz maior benefício na função cardiovascular comparado ao treinamento aeróbio contínuo. Objetivo: O presente estudo teve como objetivo analisar os efeitos de ambas as modalidades nas respostas hemodinâmicas de ratos sadios. Métodos: Ratos machos foram distribuídos aleatoriamente em três grupos: exercício contínuo (EC, n = 10; exercício intervalado (EI, n = 10; e controle (C, n = 10. A sessão do grupo EC consistiu em 30 min à intensidade de 50% da velocidade máxima (Vel Máx. O grupo EI realizou 30 min, incluindo três períodos de 4 min a 60% da Vel Máx intercalados com 4 min de recuperação a 40% da Vel Máx. Frequência Cardíaca (FC, Pressão Arterial (PA e Duplo Produto (DP foram medidos antes, durante e após o exercício. Resultados: Os grupos EC e EI apresentaram aumento da PA sistólica e DP durante o exercício em comparação ao repouso. Após o término do exercício, o grupo EC mostrou menor resposta da PA sistólica e do DP em relação ao repouso, enquanto o grupo EI apresentou menor PA sistólica e PA média. No entanto, somente no grupo EI a FC e o DP apresentaram menor resposta na recuperação. Conclusão: Uma sessão de exercício intervalado em ratos sadios induziu respostas hemodinâmicas similares durante o exercício às obtidas em exercício contínuo. Na recuperação, o exercício intervalado promoveu maiores reduções no esforço cardíaco do que em sessões contínuas de exercício.

  6. Na-caseinate/oil/water systems: emulsion morphology diagrams.

    Science.gov (United States)

    Tan, Hui Lin; McGrath, Kathryn M

    2012-09-01

    The concentrated (dispersed phase 50-70 wt%) composition space of Na-caseinate, a family of milk proteins, stabilised emulsions was investigated for three different oils: soybean oil, palm olein and tetradecane with pH 6.8 phosphate buffer continuous phase. The variation of emulsion stability and microstructure were explored using static light scattering, diffusion nuclear magnetic resonance, cryo-scanning electron microscopy, rheology and the time varying macroscopic phase separation of the emulsions. For soybean oil and palm olein a rich diversity of emulsion microstructures and stabilities are realised. Five emulsion domains, each having a different microstructure and macroscopic stability have been identified within the composition space probed. For the lowest concentrations of emulsifier bridging flocculation is evident and emulsions are of low stability. Increasing Na-caseinate concentration leads to an increased stability and the existence of distinct individual oil droplets, visualised using cryo-scanning electron microscopy. Further increases in Na-caseinate concentration reduce emulsion stability due to depletion flocculation. Na-caseinate self-assembly is then initiated. At sufficiently high Na-caseinate and/or oil concentrations the continuous phase of the emulsion is a three-dimensional protein network and emulsion stability is again enhanced. At the limits of the emulsion composition space a gel-like paste is formed. The diversity of emulsion microstructure is reduced when tetradecane is the discrete phase. Na-caseinate self-assembly is limited and there is no evidence for formation of a protein network.

  7. Theoretical considerations underlying Na(+) uptake mechanisms in freshwater fishes.

    Science.gov (United States)

    Parks, Scott K; Tresguerres, Martin; Goss, Greg G

    2008-11-01

    Ion and acid-base regulating mechanisms have been studied at the fish gill for almost a century. Original models proposed for Na(+) and Cl(-) uptake, and their linkage with H(+) and HCO(3)(-) secretion have changed substantially with the development of more sophisticated physiological techniques. At the freshwater fish gill, two dominant mechanisms for Na(+) uptake from dilute environments have persisted in the literature. The use of an apical Na(+)/H(+) exchanger driven by a basolateral Na(+)/K(+)-ATPase versus an apical Na(+) channel electrogenically coupled to an apical H(+)-ATPase have been the source of debate for a number of years. Advances in molecular biology have greatly enhanced our understanding of the basic ion transport mechanisms at the fish gill. However, it is imperative to ensure that thermodynamic principles are followed in the development of new models for gill ion transport. This review will focus on the recent molecular advances for Na(+) uptake in freshwater fish. Emphasis will be placed on thermodynamic constraints that prevent electroneutral apical NHE function in most freshwater environments. By combining recent advances in molecular and functional physiology of fish gills with thermodynamic considerations of ion transport, our knowledge in the field should continue to grow in a logical manner.

  8. Deliquescence of NaCl–NaNO3, KNO3–NaNO3, and NaCl–KNO3 salt mixtures from 90 to 120°C

    Directory of Open Access Journals (Sweden)

    Wolery Thomas J

    2005-04-01

    Full Text Available We conducted reversed deliquescence experiments in saturated NaCl–NaNO3–H2O, KNO3–NaNO3–H2O, and NaCl–KNO3–H2O systems from 90 to 120°C as a function of relative humidity and solution composition. NaCl, NaNO3, and KNO3 represent members of dust salt assemblages that are likely to deliquesce and form concentrated brines on high-level radioactive waste package surfaces in a repository environment at Yucca Mountain, NV. Discrepancy between model prediction and experiment can be as high as 8% for relative humidity and 50% for dissolved ion concentration. The discrepancy is attributed primarily to the use of 25°C models for Cl–NO3 and K–NO3 ion interactions in the current Yucca Mountain Project high-temperature Pitzer model to describe the nonideal behavior of these highly concentrated solutions.

  9. Endogenous ouabain in renal Na(+) handling and related diseases.

    Science.gov (United States)

    Manunta, Paolo; Messaggio, Elisabetta; Casamassima, Nunzia; Gatti, Guido; Carpini, Simona Delli; Zagato, Laura; Hamlyn, John M

    2010-12-01

    The Na(+) pump and its Endogenous modulator Ouabain (EO) can be considered as an ancestral enzymatic system, conserved among species ranging from Drosophila to humans, related to Na handling. In this review, we examine how EO is linked with vascular function in hypertension and if it impacts the pathogenesis of heart and renal failure. Moreover, the molecular mechanism of endogenous ouabain-linked hypertension involves the sodium pump/sodium-calcium exchanger duet. Biosynthesis of EO occurs in adrenal glands and is under the control of angiotensin II, ACTH and epinephrine. Elevated concentrations of EO and in the sub-nanomolar concentration range were found to stimulate proliferation and differentiation of cardiac and smooth muscle cells. They may have a primary role in the development of cardiac dysfunction and failure. Experimental data suggest that the Na/K-ATPase α(2)-catalytic subunit causes EO-induced vasoconstriction. Finally, maneuvers that promote Na depletion, as diuretic therapy or reduced Na intake, raise the EO levels. Taken together, these findings suggest a key role for EO in body Na homeostasis.

  10. 23Na and 1H NMR Microimaging of Intact Plants

    Science.gov (United States)

    Olt, Silvia; Krötz, Eva; Komor, Ewald; Rokitta, Markus; Haase, Axel

    2000-06-01

    23Na NMR microimaging is described to map, for the first time, the sodium distribution in living plants. As an example, the response of 6-day-old seedlings of Ricinus communis to exposure to sodium chloride concentrations from 5 to 300 mM was observed in vivo using 23Na as well as 1H NMR microimaging. Experiments were performed at 11.75 T with a double resonant 23Na-1H probehead. The probehead was homebuilt and equipped with a climate chamber. T1 and T2 of 23Na were measured in the cross section of the hypocotyl. Within 85 min 23Na images with an in-plane resolution of 156 × 156 μm were acquired. With this spatial information, the different types of tissue in the hypocotyl can be discerned. The measurement time appears to be short compared to the time scale of sodium uptake and accumulation in the plant so that the kinetics of salt stress can be followed. In conclusion, 23Na NMR microimaging promises great potential for physiological studies of the consequences of salt stress on the macroscopic level and thus may become a unique tool for characterizing plants with respect to salt tolerance and salt sensitivity.

  11. Razkorak v opredeljevanju na anketna vprašanja

    Directory of Open Access Journals (Sweden)

    Meta Novak

    2014-12-01

    Full Text Available Hipoteza razkoraka v znanju predpostavlja, da se v obdobju povečanih medij- skih sporočil razkorak v znanju med informacijsko bogatimi in informacijsko revnimi povečuje. Razkorak se ne pojavlja samo v znanju, ampak se odraža tudi v deležu opre- deljenih anketirancev na anketna vprašanja. Na podlagi podatkov, zbranih v okviru evropske družboslovne raziskave 2010, smo skušali model pojasnjevanja razkoraka v znanju aplicirati na razkorak v opredeljevanju na politična in aktualna mnenjska vpra- šanja v anketi. čeprav se model ni potrdil zelo močno, se je izkazal kot uporaben tudi pri pojasnjevanju stopnje opredeljevanja na anketna vprašanja tako za vzorec raziskave (27 evropskih držav kot za primer slovenije. v primeru slovenije razkorak v znanju v večji moči pojasnjujeta politični interes in izobrazba kot pa uporaba medijskih sporočil.

  12. Evaluation of NaX and NaY packed beds for chromium uptake from multicomponent solution

    Directory of Open Access Journals (Sweden)

    Maria Angélica Simões Dornellas de Barros

    2014-04-01

    Full Text Available In this paper the removal of chromium from Cr/Ca/Mg/K and Cr/Ca/Mg/K/Na solutions was investigated in NaX and NaY packed beds. The breakthrough curves presented some overshooting phenomena where chromium ions displaced the previous exchanged cations. Length of unused bed, overall mass transfer coefficient, operational ratio and dimensionless variance were obtained. According to such mass transfer parameters it was concluded that the chromium uptake is influenced by the competition and interaction of the entering ions. Such influences were verified through some differences in the dynamic selectivity obtained for each system. NaY seemed to have a higher affinity towards Cr3+ and its sites were more efficiently used in the ion exchange process.

  13. Conductivity, Thermal Measurements, and Phase Diagram of the Na2S2O7-NaHSO4 System

    DEFF Research Database (Denmark)

    Hatem, G.; Gaune-Escard, M.; Rasmussen, Søren Birk;

    1999-01-01

    The conductivity of the Na2S2O7-NaHSO4 binary system has been measured for 15 different compositions in the full composition range, and in the temperature range 400-700 K.Phase transition temperatures were obtained, and the phase diagram constructed. It is of thesimple eutectic type, where......, as found earlier for theK2S2O7-KHSO4 system. For each composition measured of the Na2S2O7-NaHSO4 system inthe molten state, the conductivity has been expressed by equations of the form = A(X) +B(X)(T - Tm) + C(X)(T-Tm)^2, where Tm is the intermediate temperature of the measuredtemperature range....

  14. NaNaX 4--4th event of the international conference series "Nanoscience with Nanocrystals".

    Science.gov (United States)

    Reiss, Peter

    2010-07-27

    The conference "NaNaX 4--Nanoscience with Nanocrystals" held near Munich (April 11-15, 2010) brought together a wide range of scientists discussing the most important current issues in the field of colloidal nanoparticles. Chemical synthesis gives access to nanocrystals of controlled size, shape, composition, and surface functionalization. Past research mainly concentrated on cadmium and lead chalcogenide nanocrystals as well as on gold and iron oxide nanoparticles. Today, there is a trend toward the development of nanoscale heterostructures, which combine different classes of materials and exhibit unique optical, magnetic, and electronic properties. Beside their interest for fundamental science, colloidal nanoparticles hold great promise for a wide range of applications. To this end, speakers and poster presenters showed routes for designing and using nanocrystals in biological imaging and sensing, in energy-related applications, and in catalysis. This report gives a nonexhaustive overview of selected "hot topics" in nanoparticle research discussed at NaNaX 4.

  15. Aspectos da tomografia computadorizada craniana na neurocisticercose na infância

    Directory of Open Access Journals (Sweden)

    Marilisa M. Guerreiro

    1989-06-01

    Full Text Available Os autores relatam aspectos tomográficos da neurocisticercose na infância a propósito da análise de 27 exames em 18 pacientes, que foram distribuídos em três grupos segundo o quadru clínico e os achados tomográficos. O grupo 1 foi caracterizado basicamente por epilepsias e calcificações. O grupo 2 caracterizou-se por hipertensão intracraniana e diversos aspectos tomográficos: edema, cistos e nódulos em três pacientes; hidrocefalia e calcificações em dois pacientes e normal em um paciente. O grupo 3 consistiu clinicamente de epilepsia e cefaléia, com vários padrões tomográficos. Os resultados são discutidos à luz da literatura disponível.

  16. Intensidade de poda na produção e na qualidade dos frutos de mirtileiro

    Directory of Open Access Journals (Sweden)

    André Luiz Radünz

    2014-03-01

    Full Text Available O mirtileiro possui frutos com alto potencial antioxidante e nutracêutico. Este potencial pode ser influenciado pela severidade da poda nas plantas, principalmente em função do impacto na produção e dos efeitos do aumento da radiação solar incidente sobre os frutos. O objetivo do presente trabalho foi avaliar o efeito da intensidade da poda seca sobre a produção e os atributos de qualidade dos frutos de mirtileiro das cultivares Clímax, Bluegem e Powderblue, produzidas na mesorregiäo de Pelotas-RS. Para tal, foi conduzido um experimento no município de Morro Redondo-RS, durante a safra de 2012/2013, sendo utilizadas as cultivares grupo "Rabbiteye", Clímax, Bluegem e Powderblue. A poda foi realizada em três níveis de remoção de ramos: normal, média e leve, no dia 20 de julho de 2012. A intensidade de poda seca exerceu influência sobre a produção e o teor de fitoquímicos dos frutos de mirtileiros. A produção das plantas submetidas a poda leve foi maior que as submetidas a poda média e normal, sendo o mesmo observado em relação ao teor de compostos fenólicos das cvs. Bluegem e Powderblue, enquanto para o teor de antocianinas, a intensidade de poda teve efeito distinto sobre os atributos de qualidade físico-química das diferentes cultivares.

  17. A escolha amorosa e interação conjugal na heterossexualidade e na homossexualidade

    Directory of Open Access Journals (Sweden)

    Féres-Carneiro Terezinha

    1997-01-01

    Full Text Available Este estudo tem como objetivo investigar o processo de escolha amorosa em homens e mulheres hetero e homossexuais das camadas médias da população, de diferentes faixas etárias, em diversas situações amorosas - namoro, casamento (coabitação estável, separação e recasamento (segunda ou subsequente coabitação estável; as características das relações dos conflitos conjugais por eles estabelecidas; e o papel atribuído à terapia de casal na resolução dos conflitos conjugais. Foram estudados dois grupos: 240 heterossexuais (53 solteiros, 64 casados, 63 separados e 60 recasados e 116 homossexuais (49 solteiros, 36 casados, 19 separados e 12 recasados. Na avaliação da escolha amorosa foram utilizados 26 atributos dispostos em escalas de avaliação de 5 pontos, tal como proposto por Buss (1989, e entrevistas semi-estruturadas a partir de Féres-Carneiro (1987, contendo tópicos referentes a dimensões relevantes da interação conjugal. Os resultados mostraram algumas diferenças entre homens e mulheres de ambos os grupos e algumas semelhanças no processo de escolha amorosa dos sujeitos hetero e dos sujeitos homossexuais. Tais resultados são relevantes para a prática clínica da terapia de casal, possibilitando uma melhor compreensão das especificidades da relação amorosa em diferentes tipos de conjugalidade.

  18. Carbon dioxide sequestration using NaHSO4 and NaOH: A dissolution and carbonation optimisation study.

    Science.gov (United States)

    Sanna, Aimaro; Steel, Luc; Maroto-Valer, M Mercedes

    2017-03-15

    The use of NaHSO4 to leach out Mg fromlizardite-rich serpentinite (in form of MgSO4) and the carbonation of CO2 (captured in form of Na2CO3 using NaOH) to form MgCO3 and Na2SO4 was investigated. Unlike ammonium sulphate, sodium sulphate can be separated via precipitation during the recycling step avoiding energy intensive evaporation process required in NH4-based processes. To determine the effectiveness of the NaHSO4/NaOH process when applied to lizardite, the optimisation of the dissolution and carbonation steps were performed using a UK lizardite-rich serpentine. Temperature, solid/liquid ratio, particle size, concentration and molar ratio were evaluated. An optimal dissolution efficiency of 69.6% was achieved over 3 h at 100 °C using 1.4 M sodium bisulphate and 50 g/l serpentine with particle size 75-150 μm. An optimal carbonation efficiency of 95.4% was achieved over 30 min at 90 °C and 1:1 magnesium:sodium carbonate molar ratio using non-synthesised solution. The CO2 sequestration capacity was 223.6 g carbon dioxide/kg serpentine (66.4% in terms of Mg bonded to hydromagnesite), which is comparable with those obtained using ammonium based processes. Therefore, lizardite-rich serpentinites represent a valuable resource for the NaHSO4/NaOH based pH swing mineralisation process.

  19. Design and implementation of the NaI (Tl)CsI (Na) detectors output signal generator

    CERN Document Server

    Zhou, Xu; Zhao, Jian-Ling; Zhang, Fei; Zhang, Yi-Fei; Li, Zheng-Wei; Zhang, Shuo; Li, Xu-Fang; Lu, Xue-Feng; Xu, Zhen-Ling; Lu, Fang-Jun

    2013-01-01

    We designed and implemented a signal generator that can simulate the output of the NaI (Tl)CsI (Na) detectors pre amplifier onboard the Hard X ray Modulation Telescope (HXMT). Using the development of FPGA (Field Programmable Gate Array) with VHDL language and adding random constituent, we have finally produced the double exponential random pulse signal generator. The statistical distribution of signal amplitude is programmable. The occurrence time intervals of adjacent signals content negative exponential distribution statistically.

  20. Thermoluminescence and F centers of manganese doped NaCl and NaCl-CKl crystals exposed to gamma radiation

    Energy Technology Data Exchange (ETDEWEB)

    Somera, L.; Cruz Z, E.; Roman L, J. [UNAM, Instituto de Ciencias Nucleares, Circuito Exterior, Ciudad Universitaria, 04510 Mexico D. F. (Mexico); Hernandez A, J. M.; Murrieta S, H., E-mail: ecruz@nucleares.unam.mx [UNAM, Instituto de Fisica, Circuito Exterior, Ciudad Universitaria, 04510 Mexico D. F. (Mexico)

    2015-10-15

    Alkali halides crystals doped with rare earths or transition metals have been widely studied due to the luminescence properties. In particular, NaCl and KCl single crystals present thermally stimulated luminescence (Tl) after gamma irradiation. The NaCl and the NaCl KCl mixed crystal doped with manganese (MnCl{sub 2}) impurity were grown by using the Czochralski method. The emission characteristic of Mn{sup 2+} was observed at 543 nm. The crystals were exposed between 0.02 and 10 kGy gamma dose from {sup 60}Co irradiator. Optical absorption at room temperature shows the peaked band at 452 nm corresponding to the manganese impurity. The F bands, was ascribed to the electron trapped in the anion vacancy in the lattice, were obtained at 452 nm and 455 nm belonging to NaCl:Mn and NaCl KCl:Mn, respectively. The F band increases as the doses increase and it was bleaching by the UV light at 470 nm. The glow curves of the samples show the first glow peak between 92-103 degrees C, while the second main peak was observed at 183 degrees C for the undoped NaCl and at 148 and 165 degrees C for the NaCl:Mn and NaCl-KCl:Mn, respectively. The main peak was slowly bleaching when the irradiated sample was illuminated with F (470 nm) light. Optical bleaching confirms that the F center has an important participation in the thermoluminescent response. The glow curves structure from the thermal bleaching suggests the participation of different kind of traps. Also, the kinetics parameters such as activation energy (E), frequency factor (s) and the kinetic order (b) were investigated. (Author)

  1. NaBr, NaCl和KBr在几种有机溶剂中活度系数的测定%Activity Coefficient Measurement of NaBr, NaCl and KBr in Selected Organic Solvents

    Institute of Scientific and Technical Information of China (English)

    姜波; 王利生; 李弥异

    2011-01-01

    In this paper, the conductivities of NaBr in methanol, ethanol, 1-propanol, 2-propanol, NaC1 and KBr in methanol, ethanol system (solution concentration within 0. 1 mol· L-1 ) were determined at 298.15 K, 313.15 K and 323.15 K at atmosphere pressure respectively. The mean ion activity coefficients of NaBr, NaC1 and KBr in various organic solvents were calculated according to DebyeHacker limiting law and Onsager-Falkenhangen equations. The effects of concentration and temperature on activity coefficients of electrolyte solutions were discussed. The calculated results were compared with those of NaBr in ethanol, NaC1 in methanol and KBr in methanol reported in literature. The results show that the experimental data obtained by conductivity method have good agreement with data in literature.%分别测定了NaBr在甲醉、乙醇、正丙醉和异丙醇中,NaCI和KBr在甲醉和乙醉中共8个体系(溶液物质的量的浓度在0.1 mol·L(-1)范围内)在298.15,313.15和323.15 K下的电导率,利用Debye-Hiicker和Osager-Falkenhangen公式计算了以上溶液体系的平均离子活度系数,讨论了浓度和温度对电解质溶液活度系数的影响.其中NaBr在乙醇中,NaCI在甲醉中和KBr在甲醇中的平均离子活度系数的计算结果与已发表文献中的数据进行了比较.结果表明,该方法的活度系数结果与文献数据有较好的一致性.

  2. Kaon Physics at CERN – Recent Results from the NA48/2 and NA62 Experiments

    Directory of Open Access Journals (Sweden)

    Winhart Andreas

    2012-12-01

    Full Text Available This letter presents recent results from the kaon experiments NA48/2 and its successor NA62 at CERN. With samples of 2.5 × 106 Kµ3± and 4.0 × 106 Ke3± events collected by NA48/2 in 2004, precise measurements of the form factors were performed. The Chiral Perturbation Theory was tested through a new study of K± → π±γγ decays based on data taken with minimal trigger conditions. Using the beam line and detector of NA48/2 in the years 2007-2008, NA62 performed a precison measurement of the helicitysuppressed ratio of the charged kaon leptonic decay rates K± → e+ν and K± → μ+ν Using the full data set, which is about ten times larger than the previous world data sample, the total uncertainty on this ratio is only 0.4%, representing a precision test of μ – e lepton universality. Finally, the main stage of the NA62 experiment is presented. The planned measurement of the ultra rare decay K+ → π+ vv¯ $var v$ at 10% precision will provide a powerful test of the Standard Model. The experimental challenges to reach this goal require new detectors with exceptional performances.

  3. Culturas morais e políticas de desenvolvimento na noruega e na união europeia

    Directory of Open Access Journals (Sweden)

    Maria Macedo Barroso

    2014-06-01

    Full Text Available A partir de um diálogo entre os casos da Noruega e da União Europeia, pretendemos analisar a combinação de diferentes fatores e escalas de processos sociais (individuais, institucionais e de unidades políticas nacionais e supranacionais, estruturantes na formação dos sentidos sociais do desenvolvimento, notadamente das relações entre princípios morais e trocas interessadas, constitutivas das "culturas morais" dos universos analisados. Na perspectiva dos indivíduos, observaremos pela lente do caso da UE as motivações, vocações e histórias de vida dos "profissionais do desenvolvimento", bem como as razões da adesão da opinião pública às ações de cooperação internacional. Na escala institucional, abordaremos, nos dois casos, os modelos político-administrativos utilizados pela burocracia do desenvolvimento, e as lógicas dos diferentes grupos organizados para disputar seus recursos, no caso da Noruega. Na dimensão dos Estados, analisaremos a lógica das políticas nacionais e internacionais sob as quais são negociadas as intervenções de cooperação bilateral e/ou multilaterais tanto na Noruega quanto na UE.

  4. Saúde na Agenda de Desenvolvimento pós-2015 das Nações Unidas

    Directory of Open Access Journals (Sweden)

    Paulo Marchiori Buss

    2014-12-01

    Full Text Available O artigo examina a presença da saúde como Ob-jetivo do Desenvolvimento Sustentável (ODS na Agenda do Desenvolvimento pós-2015, no processo transcorrido entre 2012 e 2014. Presente desde a Cúpula do Milênio e os ODM (2000, a saúde também aparece nos documentos que tratam da Agenda pós-2015, da Rio+20 ao documento do Grupo de Trabalho Aberto das Nações Unidas (OWG, submetido à Assembleia Geral das Nações Unidas (AGNU 2014-2015, passando pela Con-sulta Global sobre Saúde e o Painel de Alto Nível de Pessoas Eminentes. Os autores concluem pela uniformidade com que a saúde aparece nestes documentos. Identificam a amplitude do enunciado do ODS Saúde, mas alertam para o fracionamento e redução conceitual de suas metas. Propõem mudanças nas mesmas, acrescentando a questão dos determinantes sociais da saúde e metas em saúde pública, ausentes na proposta do OWG. Alertam para a necessidade de reformas na governança global e nacional, bem como para a participação da sociedade civil e da influência que pode exercer sobre a diplomacia, responsável pelo pacto que será firmado na AGNU de 2015.

  5. UČENJE NA PROSTEM NA PRIMERU UČNE POTI OB RIBNIKU VRBJE V PETEM RAZREDU OSNOVNE ŠOLE

    OpenAIRE

    2010-01-01

    Namen diplomske naloge Učenje na prostem na primeru učne poti ob ribniku Vrbje v petem razredu osnovne šole je predstaviti pomen neposrednega izkustvenega učenja in raziskovanja domače pokrajine za učence v petem razredu devetletne osnovne šole na primeru konkretne geografske učne poti. Analizirali smo učni načrt Družba ter Naravoslovje in tehnika s pomočjo deskriptivne metode in izbrali ter oblikovali učne cilje za vzpodbujanje izkustvenega učenja na osnovi terenskega dela. Na podlagi ...

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

    DEFF Research Database (Denmark)

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

    2014-01-01

    The neurological disorders familial hemiplegic migraine type 2 (FHM2), alternating hemiplegia of childhood (AHC), and rapid-onset dystonia parkinsonism (RDP) are caused by mutations of Na+,K+-ATPase α2 and α3 isoforms, expressed in glial and neuronal cells, respectively. Although these disorders ...

  7. 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

  8. Oxidant-induced formation of a neutral flavosemiquinone in the Na+-translocating NADH:Quinone oxidoreductase (Na+-NQR) from Vibrio cholerae.

    Science.gov (United States)

    Tao, Minli; Casutt, Marco S; Fritz, Günter; Steuber, Julia

    2008-01-01

    The Na(+)-translocating NADH:quinone oxidoreductase (Na(+)-NQR) from the human pathogen Vibrio cholerae is a respiratory flavo-FeS complex composed of the six subunits NqrA-F. The Na(+)-NQR was produced as His(6)-tagged protein by homologous expression in V. cholerae. The isolated complex contained near-stoichiometric amounts of non-covalently bound FAD (0.78 mol/mol Na(+)-NQR) and riboflavin (0.70 mol/mol Na(+)-NQR), catalyzed NADH-driven Na(+) transport (40 nmol Na(+)min(-1) mg(-1)), and was inhibited by 2-n-heptyl-4-hydroxyquinoline-N-oxide. EPR spectroscopy showed that Na(+)-NQR as isolated contained very low amounts of a neutral flavosemiquinone (10(-3) mol/mol Na(+)-NQR). Reduction with NADH resulted in the formation of an anionic flavosemiquinone (0.10 mol/mol Na(+)-NQR). Subsequent oxidation of the Na(+)-NQR with ubiquinone-1 or O(2) led to the formation of a neutral flavosemiquinone (0.24 mol/mol Na(+)-NQR). We propose that the Na(+)-NQR is fully oxidized in its resting state, and discuss putative schemes of NADH-triggered redox transitions.

  9. LS1 Report: NA62 readies for beam

    CERN Multimedia

    Katarina Anthony

    2014-01-01

    On Wednesday, 10 September, the last NA62 straw tracker chamber was lowered into position in the experiment. This feat brings almost 8 years of CERN construction and design to a close, as the tracker has gone from the drawing board to construction and installation.   The final straw tracker module is lowered into position in NA62. The NA62 straw tracker is one of a kind. As the first of its scale to be placed directly into the vacuum tank of an experiment, it will allow NA62 physicists to measure the direction and momentum of charged particles with high precision. "From the first design to the final plug-in and testing, CERN teams have been 100% involved in developing this unique tracker," says Hans Danielsson, NA62 straw project leader. "We worked in close collaboration with the Joint Institute for Nuclear Research (JINR), Russia, who helped develop the straw tracker technology and will participate in the running of the detector now that construction and installa...

  10. Acrylamide Mitigation in Potato Chips by Using NaCl

    DEFF Research Database (Denmark)

    Pedreschi, Franco; Granby, Kit; Risum, Jørgen

    2010-01-01

    slices in a NaCl solution over the acrylamide formation in the resultant potato chips. Potato slices (Verdi variety, diameter 40 mm, width 2.0 mm) were fried at 170 °C for 5 min (final moisture content of ∼2.0%). Prior to frying, the potato slices were treated in one of the following ways: (1) control...... slices (unblanched or raw potato slices); (2) slices blanched at 90 °C for 5 min in water; (3) slices blanched at 90 °C for 5 min plus immersed in a 1 g/100 g NaCl solution at 25 °C for 5 min; (4) slices blanched at 90 °C for 5 min plus immersed in a 3 g/100 g NaCl solution at 25 °C for 5 min; (5) slices...... blanched at 90 °C for 5 min plus immersed in distilled water at 25 °C for 5 min; and (6) slices blanched at 90 °C for 5 min in a 3 g/100 g NaCl solution. Blanching followed by the immersion of potato slices in 1 g/100 g NaCl solution was effective in reducing acrylamide content in ∼62%; however, almost...

  11. Pesquisa translacional na oftalmologia: o caminho para a medicina personalizada

    Directory of Open Access Journals (Sweden)

    Rubens Camargo Siqueira

    2012-10-01

    Full Text Available A investigação científica é tradicionalmente dividida em duas categorias: a pesquisa básica e a pesquisa aplicada. A pesquisa básica é necessária para proporcionar o melhor entendimento do estado normal versus doença, mas não diretamente traduzindo esse conhecimento em aplicação clínica útil. A pesquisa translacional seria o avanço da ciência aplicado ao desenvolvimento de novos testes de diagnóstico, drogas e ou técnicas de intervenção junto às pacientes estabelecidos na compreensão do desenvolvimento da doença e sua progressão. O principal objetivo da pesquisa translacional é integrar os avanços na biotecnologia, com ensaios clínicos, impulsionando a investigação da bancada ao leito A evolução da pesquisa translacional na área de oftalmologia está construindo uma medicina de maior eficácia na prevenção e tratamento individualizado formando os ingredientes básicos da almejada medicina personalizada. Este artigo descreve os conceitos básicos da pesquisa translacional e sua aplicação na oftalmologia.

  12. Cafeína para o tratamento de dor

    Directory of Open Access Journals (Sweden)

    Cristiane Tavares

    2012-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A cafeína é uma substância amplamente consumida com efeitos em diversos sistemas e que apresenta farmacocinética e farmacodinâmica características, causando interações com diversos medicamentos. O objetivo deste estudo é fazer uma revisão sobre os efeitos da cafeína. CONTEÚDO: Nesta revisão, são abordados a farmacologia da cafeína, os mecanismos de ação, as indicações, as contraindicações, as doses, as interações e os efeitos adversos. CONCLUSÕES: Faltam estudos controlados, randomizados e duplos-cegos para avaliar a eficácia analgésica da cafeína nas diversas síndromes dolorosas. Em pacientes com dor crônica, é necessário ter cautela em relação ao desenvolvimento de tolerância, abstinência e interação medicamentosa no uso crônico de cafeína.

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

    Science.gov (United States)

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

    2016-12-01

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

  14. Převodník Ethernet na RS-232

    OpenAIRE

    Dreiseitel, Jiří

    2012-01-01

    Práce je věnována problematice konstrukce převodníku Ethernet na RS-232 za pomocí jednočipového mikrokontroléru. Cílem je seznámit čtenáře se síťovou technologií Ethernet a technologií pro sériový přenos založený na protokolu RS-232 a zároveň s technologií vestavěných systémů pro konstrukci zařízení.Součástí práce je kompletní návrh převodníku Ethernet na RS-232 včetně návrhu a implementace firmware v jazyce C za využití LwIP TCP/IP stacku. Převodník je postaven na základě vývojového kitu STM...

  15. Scheelite-type NaEr(MoO42

    Directory of Open Access Journals (Sweden)

    Dan Zhao

    2010-05-01

    Full Text Available Explorations of the A1+–RE3+–Mo6+–O2− (A1+ is an alkali metal cation, RE3+ is a rare-earth metal cation quaternary systems prepared by the high-temperature solution growth method led to the title structure, sodium erbium bis(molybdate, NaEr(MoO42. It is isostructural to the scheelite structure (CaWO4 and is composed of [MoO4]2− tetrahedra with overline{4} symmetry and [(Na/ErO8]14− polyhedra. The [(Na/ErO8]14− polyhedron is a distorted tetragonal antiprism, also with overline{4} symmetry, with statistically mixed Na/Er atoms at its centre. There are two sets of Na/Er—O bond lengths [2.420 (4 and 2.435 (3 Å], but just one set of Mo—O bond lengths [1.774 (4 Å].

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

    CERN Document Server

    2001-01-01

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

  17. GUANTÁNAMO NA SUPREMA CORTE DOS ESTADOS UNIDOS

    Directory of Open Access Journals (Sweden)

    Ana Luisa Zago de Moraes

    2011-04-01

    Full Text Available Após os atentados de 11 de setembro de 2001, o governo norte-americano iniciou  uma“guerra ao terrorismo”, sendo uma das medidas o aprisionamento de supostos terroristas  na Base Naval de Guantánamo, em Cuba, vedando aos detentos o acesso aos tribunais americanos e quaisquer direitos e os tratando como inimigos. Em resposta a essa situação, bem como aos atos normativos que regem o encarceramento, (não processamento e tratamento na prisão, a Suprema Corte Americana, durante o governo de George W. Bush, proferiu três decisões nos casos de terroristas presos nestas circunstâncias. Na primeira, concluiu que o Habeas Corpus é garantia que se estende a qualquer indivíduo; na segunda, invocou o direito internacional dos direitos humanos e salientou que todos os seres humanos são titulares de algum tipo de proteção com base apenas em sua própria humanidade; por fim, na última, afastou novas normas que excluíam a garantia de  Habeas Corpus e conclui que juntas militares não constituem um mecanismo justo para evitar a prisão de inocentes.

  18. Magnetism in Na-filled Fe-based skutterudites.

    Science.gov (United States)

    Xing, Guangzong; Fan, Xiaofeng; Zheng, Weitao; Ma, Yanming; Shi, Hongliang; Singh, David J

    2015-06-01

    The interplay of superconductivity and magnetism is a subject of ongoing interest, stimulated most recently by the discovery of Fe-based superconductivity and the recognition that spin-fluctuations near a magnetic quantum critical point may provide an explanation for the superconductivity and the order parameter. Here we investigate magnetism in the Na filled Fe-based skutterudites using first principles calculations. NaFe4Sb12 is a known ferromagnet near a quantum critical point. We find a ferromagnetic metallic state for this compound driven by a Stoner type instability, consistent with prior work. In accord with prior work, the magnetization is overestimated, as expected for a material near an itinerant ferromagnetic quantum critical point. NaFe4P12 also shows a ferromagnetic instability at the density functional level, but this instability is much weaker than that of NaFe4Sb12, possibly placing it on the paramagnetic side of the quantum critical point. NaFe4As12 shows intermediate behavior. We also present results for skutterudite FeSb3, which is a metastable phase that has been reported in thin film form.

  19. Aprendizagem como/na prática

    Directory of Open Access Journals (Sweden)

    Jean Lave

    2015-12-01

    Full Text Available ResumoEste artigo considera como o estudo da cultura e da aprendizagem pode ser de particular relevância para o campo da antropologia sociocultural em geral. O termo mais importante na expressão “cultura & aprendizagem” talvez seja o logograma “&” – ou seja, coloca-se a questão sobre o que conecta cultura e aprendizagem, perguntando-se como esses termos estão relacionados. Como devemos compreender cultura e aprendizagem como instâncias produtoras delas próprias, e uma da outra, na prática? Recalibrando em termos relacionais, podemos dizer que não é possível abordar a “aprendizagem” ou “cultura e aprendizagem” sem o seu emaranhamento na vida político-econômica, nas lutas e disputas históricas, em suas coerências e incoerências, e na produção relacional e histórica da vida cotidiana. Através das lentes da teoria da prática social, os estudos etnográficos sobre aprendizagem na prática oferecem diferentes entendimentos sobre como certa vida e certas disputas e incoerências são produzidas.

  20. PLASMA SODIUM AND NaCl-SENSITIVE HYPERTENSION

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Objective To test the following three hypotheses: ①plasma sodium concentration displays a 24-hour rhythm; ②the circadian rhyt hm of plasma sodium is disrupted in SHR fed a basal NaCl diet; ③high NaCl diet elevates plasma sodium concentration and may lead to an increase in mean arteria l pressure (MAP) of SHR. Methods After having been instrumen ted with arterial catheter at 9 weeks of age, all rats (Spontaneously Hypertensi ve Rat, SHR; Wistar-Kyoto Rat, WKY) experienced two experimental protocols, th e mean arterial pressure and heart rate were monitored and the blood samples als o been analysed for sodium contents. Results On basal NaCl diet, plasma sodium concentrations in SHR w ere significantly higher than those of WKY at almost every time point measured a nd the plasma sodium concentration and MAP rhythms were in nearly opposite phase s; on high NaCl diet, the MAP and plasma sodium rhythms were essentially opposit e in WKY. In SHR, the plasma sodium rhythm was inversely related to the MAP rhyt hm. Conclusion Plasma sodium displays a significant circadian rhythm in rats. The high NaCl diet disrupts the normal plasma sodium circadian rhythm only in SHR.

  1. PLASMA SODIUM AND NaCl-SENSITIVE HYPERTENSION

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Objective:To test the following three hypotheses:(1)plasma sodium concentration displays a 24-hour rhythm;(2)the circadian rhythm of plasma sodium is disrupted in SHR fed a basal NaCl diet;(3)high NaCl diet elevates lpasma sodium concentration and may lead to an increase in mean arterial pressure(MAP)of SHR.Methods:After having been instrumented with arterial catheter at 9 weeks of age,all rats(Spontaneously Hypertensive Rat,SHR; Wistar-Kyoto Rat,WKY) experienced two experimental protocols,the mean arterial pressure and heart rate were monitored and the blood samples also been analysed for sodium contents.Results:On basal NaCl diet,plasma sodium concentrations in SHR were significantly higher than those of WKY at almost every time point measured and the plasma sodium concentration and MAP rhythms were in nearly opposite phases;on high NaCl diet,the MAP and plasma sodium rhythms were essentially opposite in WKY,In SHR,the plasma sodium rhythm was inversely related to the MAP rhythm.Conclusion:Plasma sodium displays a significant ciradian rhythm in rats.The high NaCl diet disrupts the normal plasma sodium circadian rhythm only in SHR.

  2. Hydrogen release from solid state NaBH{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Urgnani, J.; Torres, F.J.; Palumbo, M.; Baricco, M. [Dipartimento di Chimica I.F.M. and NIS/INSTM/CNISM, Universita di Torino, via Giuria 9, 10125 Torino (Italy)

    2008-06-15

    The aim of this work is the study of the H{sub 2} release from the thermal decomposition reaction of sodium tetrahydroboride (NaBH{sub 4}) in the solid state. Computational and experimental methods have been used. NaBH{sub 4} thermodynamic properties at room temperature and its energy of formation from NaH and BH{sub 3} have been theoretically studied using a first-principles approach. Results obtained from ab initio calculations compared well with thermodynamic properties assessed by the CALPHAD method. The effect of annealing on phase transformations in NaBH{sub 4} has been followed with various experimental analytical techniques and the structure of the samples, after suitable thermal treatments, has been analysed by X-ray diffraction. A multi-step reaction has been observed after annealing, in both isothermal and scanning conditions. The conditions for H{sub 2} release from NaBH{sub 4} in the solid state have been clarified combining experimental and computational results. (author)

  3. The Na+ transporter, TaHKT1;5-D, limits shoot Na+ accumulation in bread wheat

    KAUST Repository

    Byrt, Caitlin Siobhan

    2014-10-01

    Bread wheat (Triticum aestivum L.) has a major salt tolerance locus, Kna1, responsible for the maintenance of a high cytosolic K+/Na+ ratio in the leaves of salt stressed plants. The Kna1 locus encompasses a large DNA fragment, the distal 14% of chromosome 4DL. Limited recombination has been observed at this locus making it difficult to map genetically and identify the causal gene. Here, we decipher the function of TaHKT1;5-D, a candidate gene underlying the Kna1 locus. Transport studies using the heterologous expression systems Saccharomyces cerevisiae and Xenopus laevis oocytes indicated that TaHKT1;5-D is a Na+-selective transporter. Transient expression in Arabidopsis thaliana mesophyll protoplasts and in situ polymerase chain reaction indicated that TaHKT1;5-D is localised on the plasma membrane in the wheat root stele. RNA interference-induced silencing decreased the expression of TaHKT1;5-D in transgenic bread wheat lines which led to an increase in the Na+ concentration in the leaves. This indicates that TaHKT1;5-D retrieves Na+ from the xylem vessels in the root and has an important role in restricting the transport of Na+ from the root to the leaves in bread wheat. Thus, TaHKT1;5-D confers the essential salinity tolerance mechanism in bread wheat associated with the Kna1 locus via shoot Na+ exclusion and is critical in maintaining a high K+/Na+ ratio in the leaves. These findings show there is potential to increase the salinity tolerance of bread wheat by manipulation of HKT1;5 genes.

  4. Polythiophene-Wrapped Olivine NaFePO4 as a Cathode for Na-Ion Batteries.

    Science.gov (United States)

    Ali, Ghulam; Lee, Ji-Hoon; Susanto, Dieky; Choi, Seong-Won; Cho, Byung Won; Nam, Kyung-Wan; Chung, Kyung Yoon

    2016-06-22

    The surface of olivine NaFePO4 was modified with polythiophene (PTh) to develop a high-performance cathode material for use in Na-ion batteries. The Rietveld refinement results of the prepared material reveal that PTh-coated NaFePO4 belongs to a space group of Pnma with lattice parameters of a = 10.40656 Å, b = 6.22821 Å, and c = 4.94971 Å. Uncoated NaFePO4 delivers a discharge capacity of 108 mAh g(-1) at a current density of 10 mA g(-1) within a voltage range of 2.2-4.0 V. Conversely, the PTh-coated NaFePO4 electrode exhibits significantly improved electrochemical performance, where it exhibits a discharge capacity of 142 mAh g(-1) and a stable cycle life over 100 cycles, with a capacity retention of 94%. The NaFePO4/PTh electrode also exhibits satisfactory performance at high current densities, and reversible capacities of 70 mAh g(-1) at 150 mA g(-1) and 42 mAh g(-1) at 300 mA g(-1) are obtained compared with negligible capacities without coating. The related electrochemical reaction mechanism has been investigated using in situ X-ray absorption spectroscopy (XAS), which revealed a systematic change of Fe valence and reversible contraction/expansion of Fe-O octahedra upon desodiation/sodiation. The ex situ X-ray diffraction (XRD) results suggest that the deintercalation in NaFePO4/PTh electrodes proceeds through a stable intermediate phase and the lattice parameters show a reversible contraction/expansion of unit cell during cycling.

  5. O “JUS POSTULANDI” NA JUSTIÇA DO TRABALHO: IRRACIONALIDADE QUE PODE IMPOSSIBILITAR A

    OpenAIRE

    Negrisoli, Fabiano; Unibrasil

    2012-01-01

    Na Justiça do Trabalho, vigora o “jus postulandi”, que é a capacidade da parte, por si só, sem advogado, nas relações de emprego, postular ou se defender. O “jus postulandi”, embora questionado (inclusive em âmbito constitucional) é aceito sem ressalvas, na maioria das hipóteses. Baseando-se na Teoria do Discurso, na Teoria dos Quatro Discursos de ARISTÓTELES e na Teoria da Argumentação de ALEXY, bem como na complexidade do processo, hoje muito presente na Justiça do Trabalho, questiona-se o ...

  6. Nov način simuliranja občutka vožnje

    OpenAIRE

    ZAJC, MATIC

    2015-01-01

    To diplomsko delo predstavlja nov način simuliranja občutka vožnje. V ta namen na trgu obstajajo različni simulatorji. Tem je skupno, da za generiranje sile uporabljajo gravitacijo, kar za seboj prinese številne omejitve, predvsem pri simuliranju dolgotrajnih pospeškov. Naš način simuliranja občutka vožnje pa deluje na principu generiranje sile na glavo uporabnika s pomočjo aktuatorjev. V prvem delu si bomo na kratko ogledali zgodovino razvoja simulatorjev. Simulatorji so bili v zadnjih de...

  7. Fibras vegetais utilizadas na pesca artesanal na microrregião do Salgado, Pará

    Directory of Open Access Journals (Sweden)

    Jorge Oliveira

    Full Text Available As espécies vegetais fibrosas ocupam papel de destaque no cotidiano das comunidades tradicionais amazônicas ao lado das espécies medicinais, alimentícias e madeireiras. Na microrregião do Salgado do estado do Pará - constituída pelos municípios de Colares, Curuçá, Magalhães Barata, Maracanã, Marapanim, Salinópolis, Santarém Novo, São Caetano de Odivelas, São João de Pirabas e Vigia - as fibras vegetais são usadas em cestaria, trançados, fixadoras em substituição ao prego, adornos e vestuário. Para a elaboração do presente trabalho, os dados foram obtidos entre artesãos e pescadores artesanais da microrregião do Salgado do estado do Pará, com cerca de 150 entrevistas semiestruturadas. Foram registradas 17 espécies, distribuídas em oito famílias e 17 gêneros utilizados na preparação de implementos de pesca artesanal, cujas matérias prima são provenientes de diversas partes da planta, onde as talas são da haste caulinar de Marantaceae e estipe de Arecaceae, os cipós são raízes de Araceae e Cyclanthaceae e os caules de Bignoniaceae e Dilleniaceae, enquanto que as palhas são folhas e pinas de Arecaceae. A família mais representativa com relação ao número de espécies e o fornecimento de matéria prima utilizada foi Arecaceae com 8 spp., seguida de Dilleniaceae e Araceae com 2 spp., Bignoniaceae, Bombacaceae, Cyclanthaceae, Marantaceae e Poaceae com 1 sp. cada. O trabalho visa contribuir para o conhecimento das espécies vegetais fibrosas, quanto a sua morfologia, origem e manuseio da matéria prima, os produtos confeccionados e seus usos, além do registro dos aspectos culturais da utilização de espécies vegetais fibrosas no cotidiano da atividade pesqueira artesanal daquela microrregião.

  8. The reconstructed final state of Pb + Pb 158 AGeV reactions from spectra and correlation data of NA49, NA44 and WA98

    CERN Document Server

    Ster, A; Lörstad, B; Ster, Andras; Csorgo, Tamas; Lorstad, Bengt

    1999-01-01

    The final state of Pb + Pb reactions at CERN SPS has been reconstructed with the Buda-Lund hydro model, by performing a simultaneous fit to NA49, NA44 and WA98 data on particle correlations and spectra.

  9. Sonochemical synthesis of zeolite NaP from clinoptilolite.

    Science.gov (United States)

    Behin, Jamshid; Kazemian, Hossein; Rohani, Sohrab

    2016-01-01

    In the present work, natural clinoptilolite was converted to zeolite NaP using ultrasonic energy, in which the transformation time shortened remarkably. The effect of post-synthesis treatment using conventional hydrothermal was also investigated. The synthesized powders were characterized by XRD, TGA/DTA, SEM, and PSD analysis. The results showed that, increasing the sonication time (energy) has no significant effect on the product's morphology. The crystallinity of the synthesized samples increased slightly with increasing sonication time, but their yield remained relatively unchanged. Furthermore, post-synthesis hydrothermal treatment showed very little influence on properties of the final product. Because the ultrasonic irradiation creates acoustic cavitation cracks on the surface structure of clinoptilolite particulates and increases the concentration of soluble alumino-silicate species, which favors the prevailing super-saturation, crystallization and crystal growth of zeolite NaP happen faster. The particles of zeolite NaP synthesized by ultrasonic irradiation consist of small crystallites of uniform size.

  10. Therapeutic potential of Na(V)1.1 activators.

    Science.gov (United States)

    Jensen, Henrik S; Grunnet, Morten; Bastlund, Jesper F

    2014-03-01

    Sodium channel inhibitors have been developed and approved as drugs to treat a variety of indications. By contrast, sodium channel activators have not previously been considered relevant in a therapeutic setting owing to their high risk of toxicity and side effects. Here we present an opinion that selective activators of the Na(V)1.1 sodium channel may hold therapeutic potential for diseases such as epilepsy, schizophrenia, and Alzheimer's disease. Central to this novel avenue of sodium channel drug discovery is that fact that Na(V)1.1 comprises the majority of the sodium current in specific inhibitory interneurons. Conversely, it plays only a modest role in excitatory neurons owing to the high redundancy of other types of sodium channels in these cells. We discuss the biological background and rationale and present reflections on how to identify activators of Na(V)1.1.

  11. Trapping of polarized {sup 2}1Na

    Energy Technology Data Exchange (ETDEWEB)

    Kruithof, Wilbert; Hoek, Duurt Johan van der; Sohani, Moslem; Willmann, Lorenz; Wilschut, Hans; Jungmann, Klaus [KVI, University of Groningen (Netherlands)

    2008-07-01

    {sup 2}1Na is an excellent candidate to look for symmetry violations in nuclear {beta}-decay. It is produced at sufficient quantities at the TRI{mu}P facility of KVI. The atoms are stored in a magneto-optical trap. The decay products - an energetic positron and a recoiling Ne ion -, are detected in an energy and position sensitive scintillation particle detector and a reaction microscope, respectively. The sensitivity to symmetry violating amplitudes lies in the correlations between kinematic variables of these reaction products. Additional scalar and tensor components in the interaction can be found, e.g., in the decays of unpolarized Na atoms. Time reversal violation can be probed using polarized samples. The trapping of radioactive Na is discussed and the sensitivity limits of such an experiment is reported.

  12. Reconhecimento materno na Unidade de Cuidado Intensivo Neonatal

    Directory of Open Access Journals (Sweden)

    Monika Wernet

    2015-04-01

    Full Text Available RESUMO Objetivo: analisar experiências maternas em Unidade de Cuidado Intensivo Neonatal, com foco nas relações de reconhecimento. Método: estudo qualitativo, desenvolvido na perspectiva da hermenêutica gadameriana, fundamentado no conceito honnethiano de reconhecimento. Foram entrevistadas, em profundidade, dez mães de crianças internadas em Unidade de Cuidado Intensivo Neonatal. Resultados: há comprometimentos no processo de reconhecimento materno na unidade e, como desdobramento, surgem sentimentos de obrigação e insegurança para o cuidado do filho e fragilidades na autoestima. Conclusão: as interações com os profissionais de saúde e as normas e protocolos ali existentes promovem vulnerabilidades e comprometem o reconhecimento e a autonomia materna.

  13. A naturalidade na tradução: quem garante?

    OpenAIRE

    Alvamar Helena de Campos Andrade Lamparelli

    2007-01-01

    Este estudo se baseou em dados extraídos de um corpus paralelo composto por textos originais em inglês de artigos da Revista National Geographic, suas respectivas traduções publicadas em português na National Geographic Brasil, e os textos traduzidos antes da revisão para publicação. O objetivo foi cotejar os três textos a fim de identificar, na tradução, elementos que promovem a produção de um texto natural e fluente, que reflete o uso mais corrente na língua. Sua inserção no âmbito da lingü...

  14. Fast light of CsI(Na) crystals

    Institute of Scientific and Technical Information of China (English)

    SUN Xi-Lei; FANG Jian; XIE Yu-Guang; AN Zheng-Hua; WANG Zhi-Gang; XUE Zhen; ZHANG Ai-Wu; LU Qi-Wen; NING Fei-Peng; GEYong-Shuai; LIU Ying-Biao; LU Jun-Guang; HU Tao; ZHOU Li; CAO Jun; WANG Yi-Fang; ZHAN Liang; YU Bo-Xiang; CAI Xiao

    2011-01-01

    The responses of different common alkali halide crystals to alpha-rays and gamma-rays are tested in this research.It is found that only CsI(Na) crystals have significantly different waveforms between alpha and gamma scintillations,while others do not exhibit this phenomena.The rise time of the fast light is about 5 ns and the decay time is 17±12 ns.It is suggested that the fast light of CsI(Na) crystals arises from the recombination of free electrons with self-trapped holes of the host crystal CsI.Self-absorption limits the emission of fast light of CsI(T1) and NaI(T1) crystals.

  15. Beta-delayed neutron decay of {sup 33}Na

    Energy Technology Data Exchange (ETDEWEB)

    Radivojevic, Z. E-mail: zoran.radivojevic@phys.jyu.fi; Baumann, P.; Caurier, E.; Cederkaell, J.; Courtin, S.; Dessagne, Ph.; Jokinen, A.; Knipper, A.; Scornet, G.L.G. Le; Lyapin, V.; Miehe, Ch.; Nowacki, F.; Nummela, S.; Oinonen, M.; Poirier, E.; Ramdhane, M.; Trzaska, W.H.; Walter, G.; Aeystoe, J

    2002-04-01

    Beta-delayed neutron decay of {sup 33}Na has been studied using the on-line mass separator ISOLDE. The delayed neutron spectra were measured by time-of-flight technique using fast scintillators. Two main neutron groups at 800(60) and 1020(80) keV were assigned to the {sup 33}Na decay, showing evidence for strong feeding of states at about 4 MeV in {sup 33}Mg. By simultaneous {beta}-{gamma}-n counting the delayed neutron emission probabilities P{sub 1n}=47(6)% and P{sub 2n}=13(3)% were determined. The half-life value for {sup 33}Na, T{sub 1/2}=8.0(3) ms, was measured by three different techniques, one employing identifying gamma transitions and two employing beta and neutron counting.

  16. Reich e a possibilidade do bem-estar na cultura

    Directory of Open Access Journals (Sweden)

    Paulo Albertini

    2003-01-01

    Full Text Available Numa entrevista dada em 1952, Reich afirmou que o texto freudiano O mal-estar na cultura fora escrito em resposta a uma conferência que proferira na casa do Freud sobre o tema profilaxia das neuroses. Inspirado nesse depoimento, este trabalho procura investigar as teses reichianas que se contrapõem ao pensamento freudiano de O mal-estar na cultura. Diferenciam-se as posições dos autores a partir das idéias de conflito inevitável (Freud e de possibilidade de harmonia (Reich. As principais noções focalizadas são as de: sexualidade, agressividade e formação reativa.

  17. Prospects for exotics and LFV at NA62

    Science.gov (United States)

    Petrov, P.

    2017-01-01

    The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the ultra-rare decay with 10% precision. For this purpose the experiment aims to collect of the order of 100 events which would require at least 1013 K + decays in the fiducial volume of the detector. The large sample of K+ decays that will be available at NA62 allows the experiment to carry out a rich program for rare and forbidden K+ and π 0 decays, including lepton flavour and/or number violating modes, sterile neutrinos, exotic particles (e.g. Dark Photons). NA62’s potential for such searches in K+ and π 0 decays is discussed, with initial sensitivity estimates. In addition, plans for continuing the experiment after 2021 (Long Shutdown 2) are presented, including in particular the possibility to operate in a beam-dump mode for exploring various Dark Matter scenarios.

  18. Autoeducação e liberdade na Pedagogia Waldorf

    OpenAIRE

    2013-01-01

    Este artigo discute o significado de educação para a liberdade na Pedagogia Waldorf. A análise fenomenológica é adotada como suporte para compreensão do autodesenvolvimento da consciência docente em direção à sua potencialidade intuitiva. A autoeducação dos professores é a tradução prática dos fundamentos filosóficos concebidos por Steiner. Na formação de professores Waldorf, a autoeducação é explorada na dialética entre os movimentos psíquicos de simpatia e antipatia em relação ao mundo. A a...

  19. Synthesis and characterization of nanocrystalline NaTaO3

    Institute of Scientific and Technical Information of China (English)

    CHEN Jingfang; HU Long; ZHAO Jianling; TANG Chengchun; LI Yangxian

    2006-01-01

    Tantalum pentoxide reacts actively with concentrated NaOH solution under hydrothermal conditions at 180 ℃.In the reaction between NaOH solution and Ta2O5, the structure and composition of the tantalates depend on the reaction time, and the structure evolution results in a remarkable change in light absorption.Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) diffused reflection spectrum were used to characterize various properties of the obtained solid products.At 180 ℃, the reaction proceeds rapidly.With the increase of time, the reflection peaks of unreacted Ta2O5 in the XRD patterns becomes weaker and weaker.Pure NaTaO3 is obtained after 60 min, which is well crystallized with a uniform cubic morphology.

  20. Mucoproteína versus alfa-1-glicoproteína ácida: o que quantificar?

    Directory of Open Access Journals (Sweden)

    Picheth Geraldo

    2002-01-01

    Full Text Available A quantificação sérica da alfa-1-glicoproteína (GPA ácida é útil no diagnóstico e no acompanhamento dos processos agudos resultantes de múltiplas causas. Esta proteína também pode ser estimada pela quantificação da mucoproteína (Muco, ensaio que reflete as glicoproteínas com elevado teor de açúcar, entre as quais a GPA é majoritária. O objetivo deste trabalho é verificar a correlação e a performance analítica das determinações de mucoproteína (Muco e alfa-1-glicoproteína ácida (GPA, propondo uma equação de regressão linear. Amostras de soros de 540 pacientes, com idades entre 10 e 79 anos (média de 34,6, predominando mulheres (71,3%, foram analisadas simultaneamente para Muco (Winzler, manual com reagentes próprios e GPA (imunoturbidimetria automatizada, Roche; Cobas mira. A análise de regressão, fixando a Muco como variável dependente, apresentou Muco (mg/dl em tirosina = 0,031 x GPA (mg/dl + 0,8 (r = 0,91; e, fixando o intercepto em zero, Muco = 0,039 x GPA (r = 0,98. A imprecisão interensaio foi de 23,4% e 5,2% (coeficiente de variação, respectivamente, para Muco e GPA. Conclusão: a elevada variabilidade analítica da quantificação da mucoproteína pelo método de Winzler recomenda que este ensaio seja substituído pela dosagem da alfa-1-glicoproteína ácida. Quando necessário, recomendamos estimar a mucoproteína, quantificando a alfa-1-glicoproteína ácida com ensaios de mesmo desempenho que o do utilizado neste trabalho, e usar a equação de regressão AGP (mg/dl x 0,039 = Muco (mg/dl em tirosina.

  1. A tomografia computadorizada na avaliação do comprometimento abdominal na paracoccidioidomicose

    Directory of Open Access Journals (Sweden)

    Roberto Martinez

    1988-06-01

    Full Text Available A tomografia computadorizada foi utilizada para avaliar o comprometimento abdominal em 25 doentes deparacoccidioidomicose. Existiam lesões intra-abdominais em, respectivamente, 75%e23% dos doentes com asformas aguda ("juvenil" e crônica ( do adulto '. A alteração mais freqüente foi o aumento dos gânglios linfáticos abdominais (12/25 casos; outras lesões foram: calcificação de gânglios linfáticos em 4 casos; obstrução das vias biliares em 5 doentes ictéricos; abscessos ou calcificação esplénica em 3 casos; 2 doentes mostraram lesões incomuns: aumento e irrgularidade do pâncreas em um e múltiplos abscessos nos músculos psoas em outro. Conclui-se que a tomografia computadorizada é procedimento útil na avaliação da disseminação da paracoccidioidomicose ao abdome e no diagnóstico de suas complicações abdominais.

  2. USO DE MÍDIAS NA CONSTRUÇÃO DE VALORES NA ESCOLA

    Directory of Open Access Journals (Sweden)

    A. M. Netta

    2012-05-01

    Full Text Available Introduzir o uso das mídias no meio educacional é meta governamental, para isto, as escolas vêm sendoequipadas para o trabalho e os professores formados com o objetivo de disseminar a inclusão digital no dia a dia daspessoas. Utilizando os recursos de mídia como uma poderosa ferramenta, este trabalho tratou de um tema muitoimportante que teve como objetivo a discussão de valores éticos e morais com a turma de 7º ano da E. M. E. F.Florestan Fernandes no Município de Presidente Médici. As mídias disponíveis na escola foram utilizadas nodesenvolvimento do projeto para tornar mais envolvente para os alunos o desenvolvimento do tema proposto.To introduce the use of the medias in the educational way is governmental goal, for this, the schoolscome being equipped and the professors formed with the objective to spread the digital inclusion in the day the dayof the people. Using the media resources as a powerful tool, this work dealt with a very important subject that it hadas objective the quarrel of ethical and moral values with the group of 7º year of E.M.E.F. Florestan Fernandes in theCity of President Médici. The available medias in the school had been used in the development of the project tobecome more involving for the pupils the development of the considered subject.

  3. Investigation of sodalites for conditioning halide salts (NaCl and NaI): Comparison of two synthesis routes

    Energy Technology Data Exchange (ETDEWEB)

    Bardez, Isabelle; Campayo, Lionel; Rigaud, Danielle; Chartier, Myriam; Calvet, Aurelie [CEA, Laboratoire d' Etudes des Materiaux Ceramiques pour le Conditionnement, Site de Marcoule, Batiment 208, B.P. 17171, 30207 Bagnols sur Ceze cedex (France)

    2008-07-01

    Sodalites with the general formula Na{sub 8}Al{sub 6}Si{sub 6}O{sub 24}X{sub 2} (where X = Cl or I) were investigated for ceramic conditioning of halide salts (NaCl and NaI). Because of the tendency of halides to volatilize at high temperature, two synthesis routes were tested to optimize the halide content in the sodalite phase. The first is based on heating at high temperature of a [nepheline NaAlSiO{sub 4} + salt] mixture prepared by a dry process. The second, performed at low temperature, consists of the reaction in aqueous media between kaolinite (Al{sub 2}Si{sub 2}O{sub 5}(OH){sub 4}), sodium hydroxide (NaOH) and the salt. The present study compares these two syntheses and examines differences between chloro-sodalite and iodo-sodalite based on X-ray diffraction and infrared spectroscopy. The next step will consist in sintering the resulting powder samples to obtain dense ceramics. (authors)

  4. Measurement of low-energy Na^+ -- Na total collision rate in an ion--neutral hybrid trap

    CERN Document Server

    Goodman, D S; Kwolek, J M; Blümel, R; Narducci, F A; Smith, W W

    2014-01-01

    We present measurements of the total elastic and resonant charge-exchange ion-atom collision rate coefficient $k_\\mathrm{ia}$ of cold sodium (\\ce{Na}) with optically-dark low energy \\ce{Na+} ions in a hybrid ion-neutral trap. To determine $k_\\mathrm{ia}$, we measured the trap loading and loss from both a \\ce{Na} magneto-optical trap (MOT) and a linear radio frequency quadrupole Paul trap. We found the total rate coefficient to be $7.4 \\pm 1.9 \\times 10^{-8}$ cm$^3$/s for the type I \\ce{Na} MOT immersed within an $\\approx 140$ K ion cloud and $1.10 \\pm 0.25 \\times 10^{-7}$ cm$^3$/s for the type II \\ce{Na} MOT within an $\\approx 1070$ K ion cloud. Our measurements show excellent agreement with previously reported theoretical fully quantal \\textit{ab initio} calculations. In the process of determining the total rate coefficient, we demonstrate that a MOT can be used to probe an optically dark ion cloud's spatial distribution within a hybrid trap.

  5. High Pressure Strength Study on NaCl

    Science.gov (United States)

    Mi, Z.; Shieh, S. R.; High Pressure Mineral Physics Group

    2010-12-01

    Yield strength is regarded as one important property related to rheological characteristics of minerals in the Earth’s interior. The strength study of NaCl, a popular pressure medium in static high pressure experiments, has been carried out under non-hydrostatic conditions in a diamond anvil cell up to 43 GPa at room temperature using radial energy dispersive X-ray diffraction technique. Phase transformation from B1 (rock salt structure) to B2 (CsCl structure) starts at 29.4 GPa, and is complete at 32.1 GPa. Bulk modulus obtained by third order Birch-Manurgham equation of state is 25.5 GPa with pressure derivative 4.6 for B1 phase, and 30.78 GPa with pressure derivative 4.32 GPa for B2 phase, which are in a good agreement with previous studies. The differential stress of NaCl B1 phase shows very gentle increase with pressure, which indicates that NaCl is a very good pressure-transmitting medium at pressure below 30 GPa. However, the differential stress increases more abruptly for B2 phase and this may imply that NaCl can no longer be regarded as a “soft” pressure medium at very high pressures. For B1 phase, (111) is the strongest plane and (200) is the weakest plane, while (200) becomes the strongest plane in B2 phase. Pure NaCl is weaker than mixture MgO and NaCl, which indicates that soft material become stronger when mixed with hard material. The yield strength of B2 obtained through energy dispersive X-ray diffraction technique increase linearly, while the value derived by pressure gradient method shows jagged trend.

  6. Pancreatic β-cell Na+ channels control global Ca2+ signaling and oxidative metabolism by inducing Na+ and Ca2+ responses that are propagated into mitochondria.

    Science.gov (United States)

    Nita, Iulia I; Hershfinkel, Michal; Kantor, Chase; Rutter, Guy A; Lewis, Eli C; Sekler, Israel

    2014-08-01

    Communication between the plasma membrane and mitochondria is essential for initiating the Ca(2+) and metabolic signals required for secretion in β cells. Although voltage-dependent Na(+) channels are abundantly expressed in β cells and activated by glucose, their role in communicating with mitochondria is unresolved. Here, we combined fluorescent Na(+), Ca(2+), and ATP imaging, electrophysiological analysis with tetrodotoxin (TTX)-dependent block of the Na(+) channel, and molecular manipulation of mitochondrial Ca(2+) transporters to study the communication between Na(+) channels and mitochondria. We show that TTX inhibits glucose-dependent depolarization and blocks cytosolic Na(+) and Ca(2+) responses and their propagation into mitochondria. TTX-sensitive mitochondrial Ca(2+) influx was largely blocked by knockdown of the mitochondrial Ca(2+) uniporter (MCU) expression. Knockdown of the mitochondrial Na(+)/Ca(2+) exchanger (NCLX) and Na(+) dose response analysis demonstrated that NCLX mediates the mitochondrial Na(+) influx and is tuned to sense the TTX-sensitive cytosolic Na(+) responses. Finally, TTX blocked glucose-dependent mitochondrial Ca(2+) rise, mitochondrial metabolic activity, and ATP production. Our results show that communication of the Na(+) channels with mitochondria shape both global Ca(2+) and metabolism signals linked to insulin secretion in β cells.- Nita, I. I., Hershfinkel, M., Kantor, C., Rutter, G. A., Lewis, E. C., Sekler, I. Pancreatic β-cell Na(+) channels control global Ca(2+) signaling and oxidative metabolism by inducing Na(+) and Ca(2+) responses that are propagated into mitochondria.

  7. Performance of lime-BHA solidified plating sludge in the presence of Na2SiO3 and Na2CO3.

    Science.gov (United States)

    Piyapanuwat, Rungroj; Asavapisit, Suwimol

    2011-09-01

    This research investigated the performance of lime-BHA (black rice husk ash) solidified plating sludge with 2 wt% NaO from Na(2)SiO(3) and Na(2)CO(3) at the level of 0, 30 and 50 wt%. The sludge was evaluated for strength development, leachability, solution chemistry and microstructure. The lime-BHA solidified plating sludge with Na(2)SiO(3) and Na(2)CO(3) had higher early strength when compared to the control. The addition of Na(2)SiO(3) and Na(2)CO(3) increased the OH(-) concentration and decreased the Ca(2+) and heavy metal ions in solution after the first minute. The XRD patterns showed that the addition of Na(2)SiO(3) resulted in the formation of calcium silicate hydrates, while the addition of Na(2)CO(3) resulted in CaCO(3). The heavy metals from the plating sludge, especially Zn, were immobilized in calcium zincate and calcium zinc silicate forms for the lime-BHA with and without Na(2)SiO(3) solidified wastes, while samples with Na(2)CO(3) contained Zn that was fixed in the form of CaZnCO(3). The cumulative leaching of Fe, Cr and Zn from the lime-BHA solidified plating sludge decreased significantly when activators were added, especially Na(2)CO(3).

  8. First principles study of the crystal, electronic structure, and diffusion mechanism of polaron-Na vacancy of Na3MnPO4CO3 for Na-ion battery applications

    Science.gov (United States)

    Debbichi, M.; Debbichi, L.; Dinh, Van An; Lebègue, S.

    2017-02-01

    Based on first principles calculations, we investigate the geometry, electronic structure, and diffusion mechanism of Na ions in Na3MnPO4CO3 using density functional theory with a Hubbard potential correction. Our results suggest that the structure of Na3MnPO4CO3 can be deintercalated with more than one Na ion, and that the removal of a Na ion can form a bound polaron. We find that our calculations of the intercalation voltages for the redox couples Mn2+ /Mn3+ and Mn3+ /Mn4+ agree very well with the experimental data. In addition, we demonstrate that Na in Na3MnPO4CO3 can diffuse in three directions with low activation energy barriers, allowing a fast charging rate.

  9. PODOBA ŽENSK NA NASLOVNICAH ŽENSKIH REVIJ

    OpenAIRE

    Šela, Tina

    2010-01-01

    Ženske revije veljajo za lahkoten žanr, ki se je v zadnjem času zelo razširil. Zanje je značilno, da bralke obravnavajo kot potrošnice in s svojimi idealiziranimi podobami žensk na naslovnicah zbujajo pri bralkah negativen odnos do svojega telesa ter jih silijo, da ga vedno znova izpopolnjujejo. V diplomski nalogi smo preučili: kaj so ženske revije, katere so njihove značilnosti, razvoj ženskih revij na Slovenskem ter njihovo ciljno publiko. Posvetili smo se grafični podobi naslovnic žens...

  10. Sanacija korita i vodopada na rijeci Plivi u Jajcu

    OpenAIRE

    Milašinović, Zoran; Zovko, Danijela; Lukić, Ivana

    2010-01-01

    Prikazuje se stradanje korita i vodopada rijeke Plive te zahvati kojima su se kroz povijest pokušale sanirati nastale štete. Pri izradi idejnog rješenja prikazanog u ovom radu, pošlo se od ideje da se osigura globalna i lokalna stabilnost vodopada, a i njegova trajnost u dužem razdoblju. Opisani su i sanacijski zahvati duž korita i na vodopadu kojima se pokušalo zadovoljiti osnovni kriterij koji se odnosi na to da treba osigurati ponovno taloženje sedre u vodotoku rijeke Plive.

  11. 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.

  12. PLESNI ODZIV PREDŠOLSKIH OTROK NA VIVALDIJEVO GLASBO

    OpenAIRE

    Vrhovnik, Natalija; Novak, Ksenija

    2014-01-01

    Diplomsko delo obravnava plesne dejavnosti otrok na predšolski stopnji. V teoretičnem delu so podane vsebine, ki izhajajo iz baroka oz. iz časa, v katerem je ustvarjal Antonio Vivaldi. Opisana je opredelitev umetnosti, dotaknemo se estetike ter otrokovih potreb po plesu. V drugem delu teoretičnega dela predstavimo življenjepis Antonia Vivaldija, obdobje, v katerem je živel, nato sledi opis njegovega dela Štirje letni časi. Namen empiričnega dela je bil preučiti plesni odziv otrok na ...

  13. MengNa,a Lipstick Index for Hosiery Economy

    Institute of Scientific and Technical Information of China (English)

    Zhao Hong

    2011-01-01

    "It's one small step for man,one giant leap for mankind." This is not what MengNa's owner says,Mr.Zong Guyin was thinking of these words when he signed a pact with China National Space Administration,believing this is a small step for business,but a giant leap for his brand strategy implementation for the company.MengNa,a famous hosiery brand,and a name of the hosiery company in China,and a lipstick index for hosiery economy,as many believe so.

  14. Toward Triplet Ground State NaLi Molecules

    Science.gov (United States)

    Ebadi, Sepehr; Jamison, Alan; Rvachov, Timur; Jing, Li; Son, Hyungmok; Jiang, Yijun; Zwierlein, Martin; Ketterle, Wolfgang

    2016-05-01

    The NaLi molecule is expected to have a long lifetime in the triplet ground-state due to its fermionic nature, large rotational constant, and weak spin-orbit coupling. The triplet state has both electric and magnetic dipole moments, affording unique opportunities in quantum simulation and ultracold chemistry. We have mapped the excited state NaLi triplet potential by means of photoassociation spectroscopy. We report on this and our further progress toward the creation of the triplet ground-state molecules using STIRAP. NSF, ARO-MURI, Samsung, NSERC.

  15. Microscopia confocal in vivo na cistinose: relato de caso

    Directory of Open Access Journals (Sweden)

    Victor Gustavo

    2004-01-01

    Full Text Available A cistinose é doença autossômica recessiva rara caracterizada pelo acúmulo do aminoácido cistina livre dentro dos lisossomos e geralmente é fatal na primeira década de vida na ausência de transplante renal. O presente estudo tem por objetivo relatar os achados da microscopia confocal in vivo em paciente adulto com cistinose infantil. O exame de microscopia confocal in vivo revelou que há diferenças quanto à intensidade de acometimento, tamanho e forma dos depósitos nas diversas camadas corneanas.

  16. O abuso de medicamentos psicotrópicos na contemporaneidade

    Directory of Open Access Journals (Sweden)

    Marta Regueira Fonseca Pelegrini

    Full Text Available O artigo propõe uma análise crítica do fenômeno do abuso de medicamentos psicotrópicos na atualidade. A base teórica é a psicanálise. A argumentação parte da discussão da subjetividade contemporânea, resgatando o conceito de mal-estar na civilização em Freud, para elucidar algumas das causas e dos efeitos desse fato atual.

  17. Data Communication PC/NaI-borehole probe (Hardware & Software)

    DEFF Research Database (Denmark)

    Madsen, Peter Buch

    Development of new hard- & software to a NaI borehole probe on a PC. Save data from the probe each 10'th sec, handle the data from the probe and make calculations every 10'th sec and show the results on the monitor.......Development of new hard- & software to a NaI borehole probe on a PC. Save data from the probe each 10'th sec, handle the data from the probe and make calculations every 10'th sec and show the results on the monitor....

  18. GPU real-time processing in NA62 trigger system

    Science.gov (United States)

    Ammendola, R.; Biagioni, A.; Chiozzi, S.; Cretaro, P.; Di Lorenzo, S.; Fantechi, R.; Fiorini, M.; Frezza, O.; Lamanna, G.; Lo Cicero, F.; Lonardo, A.; Martinelli, M.; Neri, I.; Paolucci, P. S.; Pastorelli, E.; Piandani, R.; Piccini, M.; Pontisso, L.; Rossetti, D.; Simula, F.; Sozzi, M.; Vicini, P.

    2017-01-01

    A commercial Graphics Processing Unit (GPU) is used to build a fast Level 0 (L0) trigger system tested parasitically with the TDAQ (Trigger and Data Acquisition systems) of the NA62 experiment at CERN. In particular, the parallel computing power of the GPU is exploited to perform real-time fitting in the Ring Imaging CHerenkov (RICH) detector. Direct GPU communication using a FPGA-based board has been used to reduce the data transmission latency. The performance of the system for multi-ring reconstrunction obtained during the NA62 physics run will be presented.

  19. Aprendizagem e Desenvolvimento na Teoria de Jean Piaget

    OpenAIRE

    Maria Suzana de Stefano Menin

    2009-01-01

    Neste artigo são apresentadas, segundo indicay6es de Castorina (1988), e desenvolvidas três etapas em que a teoria Psicogenetica de Jean Piaget debruçou-se sobre as relações entre aprendizagem e desenvolvimento buscando esclarece-las. Na primeira etapa, a teoria buscou diferenciar-se das posi96es empiristas e aprioristas afirmando todo o desenvolvimento cognitivo como construção gradual de estruturas. Na segunda, negou-se a possibilidade de apressar a construção de operações 16gicas atraves d...

  20. Olivine-type NaCd(AsO4).

    Science.gov (United States)

    Weil, Matthias

    2013-10-05

    The title compound, sodium cadmium orthoarsenate, adopts the olivine [Mg2(SiO4)] structure type in space group Pnma, with Na (site symmetry -1) and Cd (.m.) replacing the two Mg positions, and the AsO4 tetra-hedron (.m.) the SiO4 tetra-hedron. The crystal structure is made up of a nearly hexa-gonal closed-packed arrangement of O atoms stacked along [001]. The Na and Cd atoms occupy one half of the octa-hedral voids in alternate layers stacked along [100], and one eighth of the tetra-hedral voids are occupied by As atoms.

  1. Deuteration of piperylene on zeolite NaY

    Energy Technology Data Exchange (ETDEWEB)

    Kharlamov, V.V.; Kadentsev, V.I.; Kharatishvili, N.G.; Minachev, Kh.M.

    1982-04-20

    In order to further refine the mechanism of hydrogenation reaction on zeolites, the deuteration of piperylene on NaY was studied. The kinetic isotope effect in the hydrogenation of piperylene on zeolite NaY indicates that hydrogen takes part in the limiting step of the process and the 1-pentene and 2-pentene formed in the deuteration of piperylene have a wide isotope distribution, with a maximum amount of the d/sub 2/ isotope, and an average number of deuterium atoms in the molecules equal to 2.25-2.36.

  2. Cadastramento fitossociológico de plantas daninhas na bananicultura

    OpenAIRE

    Gomes,G.L.G.C.; Ibrahim,F.N.; Macedo, G. L.; Nobrega, L. P.; Alves, E.

    2010-01-01

    O objetivo deste experimento, realizado na cultura da banana (Musa spp.) no Vale do Ribeira, no município de Registro-SP, foi fazer um cadastramento fitossociológico das espécies de plantas daninhas sob duas formas de manejo do solo. A amostragem das espécies daninhas foi feita em duas áreas distintas de manejo, sendo uma com a cultura implantada em área de várzea drenada a 7 m de altitude e a outra com a bananicultura em área de sequeiro a 16 m de altitude. Na amostragem de um hectare, utili...

  3. Phase transitions in Na2TeO4 ceramics

    Indian Academy of Sciences (India)

    N K Singh; R N P Choudhary

    2000-08-01

    Polycrystalline samples of NaTeO4 were prepared by conventional solid-state reaction technique at low temperature (600°C). X-ray powder diffraction (XRD) technique was used to check the formation of single phase NaTeO4 compound with cell parameters = 10.602(1) Å; = 70.622(1) Å and = 8.506(1) Å in orthorhombic crystal system. Detailed studies of dielectric constant () (and loss tangent (tan ) as a function of frequency (400 Hz–10 kHz) and temperature (– 120°C–260°C) show that the compound has two phase transitions in the ferroelectric phase.

  4. Solvation of Na+, K+, and Their Dimers in Helium

    OpenAIRE

    An der Lan, Lukas; Bartl, Peter; Leidlmair, Christian; Jochum, Roland; Denifl, Stephan; Echt, Olof; Scheier, Paul

    2012-01-01

    Helium atoms bind strongly to alkali cations which, when embedded in liquid helium, form so-called snowballs. Calculations suggest that helium atoms in the first solvation layer of these snowballs form rigid structures and that their number (n) is well defined, especially for the lighter alkalis. However, experiments have so far failed to accurately determine values of n. We present high-resolution mass spectra of Na+He n , K+He n , Na2 +He n and K2 +He n , formed by electron ionization of do...

  5. Performance of a BGO-NaI {eta} spectrometer

    Energy Technology Data Exchange (ETDEWEB)

    Leitch, M.J. [Los Alamos National Lab., NM (United States). Div. of Physics; Anderson, M.E. [Los Alamos National Lab., NM (United States). Div. of Physics; Kapustinsky, J. [Los Alamos National Lab., NM (United States). Div. of Physics; Li, T.K. [Los Alamos National Lab., NM (United States). Div. of Physics; Mishra, C.S. [Los Alamos National Lab., NM (United States). Div. of Physics; Peng, J.C. [Los Alamos National Lab., NM (United States). Div. of Physics; Simmons, J.E. [Los Alamos National Lab., NM (United States). Div. of Physics; Dytman, S.A. [Pittsburgh Univ., PA (United States). Dept. of Physics; Hardie, J.G. [Pittsburgh Univ., PA (United States). Dept. of Physics; Von Reden, K.F. [Pittsburgh Univ., PA (United States). Dept. of Physics; Smith, C. [University of Virginia, Charlottesville, VA 22901 (United States)

    1996-06-01

    A two-arm spectrometer, designed to detect {eta} and {pi}{sup 0} mesons, has been built and used in ({pi},{eta}) measurements at LAMPF. This spectrometer contains BGO active converters and NaI total-energy counters. Its construction and performance for ({pi}{sup -},{pi}{sup 0}) and ({pi}{sup -},{eta}) measurements on CH{sub 2} are described. Novel techniques to monitor the gains of the BGO and NaI counters are also presented. (orig.).

  6. Shoper marketing na atmosfera do ponto de venda

    OpenAIRE

    Oliveira, Adalberto Ribeiro

    2013-01-01

    Dissertação de mestrado em Marketing, apresentada à Faculdade de Economia da Universidade de Coimbra, sob a orientação de Arnaldo Coelho O Projeto Shopper Marketing na atmosfera do ponto de venda apresentado no formato dissertação pretende analisar o comportamento de compra do shopper ao receber estímulos de shopper marketing na atmosfera do ponto de venda. Pretende-se também verificar quais os estímulos de shopper marketing que têm influenciado de forma mais eficaz os diferentes tipos de ...

  7. Prognozowanie cen energii elektrycznej na giełdzie energii

    OpenAIRE

    Ejdys, Joanna; Halicka, Katarzyna; Godlewska, Justyna

    2015-01-01

    Zasadniczym celem artykułu było wyznaczenie prognozy ceny energii elektrycznej na Rynku Dnia Następnego Towarowej Giełdy Energii. Kolejnym istotnym celem badań było przeprowadzenie analizy porównawczej jakości otrzymanych prognoz i dokonanie rekomendacji zbudowanych modeli prognostycznych. Początkowo przeanalizowano zebrane dane, przeprowadzono dekompozycję analizowanego szeregu czasowego. Następnie wyznaczono prognozę ceny energii elektrycznej na giełdzie en...

  8. POTENCIAL TECNOLÓGICO DAS ARGILAS NA COSMETOLOGIA

    OpenAIRE

    2014-01-01

    O uso das argilas com propriedades tecnológicas tem despertado grandes interesses nas indústrias, pois é um argilomineral abundante no Brasil e economicamente viável, além de ser um material que ao ser descartado não agride o meio ambiente. Dentre suas várias aplicações podemos destacar na cosmetologia, onde está relacionada com o ajuste das propriedades reológicas, estabilidade de emulsões e suspensões e na liberação de substâncias específicas. O objetivo desse trabalho foi avaliar o pote...

  9. O bambu na arquitetura: desing de conexões estruturais

    OpenAIRE

    Padovan, Roberval Bráz [UNESP

    2010-01-01

    O bambu é considerado um dos mais antigos materiais para habitações, porém, o desenvolvimento de tecnologia própria, como material de construção de qualidade, vem acontecendo somente nas últimas três décadas, quando surgiu uma discussão mundial sobre sustentabilidade. A variável ambiental passou, então, a ser considerada em qualquer projeto de desenvolvimento, uma vez que influencia tanto na disponibilidade futura de matérias-primas e energia, quanto na qualidade de vida das populações. Uma d...

  10. Os distúrbios alimentares na diabetes mellitus tipo 1

    OpenAIRE

    Pereira, Inês Sofia Soares

    2013-01-01

    Introdução: A diabetes mellitus tipo 1 e os distúrbios alimentares são doenças frequentes na adolescência. Em ambas as condições, os pacientes dão uma grande importância ao peso corporal e à dieta. Assim, estima-se que os pacientes com diabetes mellitus tipo 1 tenham uma grande vulnerabilidade para o desenvolvimento de distúrbios alimentares (incluindo a diabulimia, um comportamento compensatório particular), que podem ter repercussões significativas na sua qualidade de vida. Os objectivos de...

  11. Alergia Alimentar na Restauração

    OpenAIRE

    Pádua, Inês; Barros, Renata; Moreira, Pedro; Moreira, André; Graça,Pedro; Carrelhas, Helena

    2016-01-01

    O Manual de Alergia Alimentar para a Restauração foi criado com o objetivo de informar, educar e ajudar os setores da restauração, hotelaria e turismo a lidar com a alergia alimentar e com as novas disposições previstas no regulamento 1169/2011 da União Europeia. O presente manual inclui assim componentes educacionais e práticas na abordagem à alergia alimentar na restauração, não tendo caráter vinculativo ou legal, nem substituindo a abordagem médica ou nutricional no diagnóstico e tratament...

  12. Vochysiaceae na Serra do Cipo, Minas Gerais, Brasil

    OpenAIRE

    Gustavo Hiroaki Shimizu

    2009-01-01

    Resumo: O presente trabalho apresenta o tratamento taxonômico das espécies de Vochysiaceae ocorrentes na Serra do Cipó, Minas Gerais, realizado por meio de material herborizado e observações no campo. A Serra do Cipó compreende porção do segmento meridional da Cadeia do Espinhaço, sendo caracterizada por solos rasos e arenosos, ácidos e pobres em nutrientes, onde são comuns as formações quartzíticas na forma de estruturas rochosas dobradas e os afloramentos areníticos. A vegetação é composta ...

  13. Estcoy-17 mehed saabuvad eeldatavalt täna

    Index Scriptorium Estoniae

    2014-01-01

    Afganistanis teeniv jalaväekompanii Estcoy-17 jõuab praeguste plaanide järgi Tallinna täna hilisõhtul. Kaitsevägi toob koostöös Ühendkuningriigi liitlastega Estcoy-17 kaitseväelased koju lennukiga Tristar, mis väljus Camp Bastioni sõjaväebaasist eile hilisõhtul ja jõuab täna Brize Nortoni sõjaväebaasi. Ühendkuningriigist toob kaitsevägi Estcoy-17 koju tšarterlennuga

  14. ZGODOVINA MISIJONARJEV V AFRIKI S POUDARKOM NA ANGOLI IN MOZAMBIKU

    OpenAIRE

    Furman, Maruša

    2012-01-01

    V diplomski nalogi je obravnavana zgodovina misijonarjev v Afriki s poudarkom na Angoli in Mozambiku. Delo in življenje misijonarjev se v primerjavi s preteklostjo danes razlikuje. Prvi misijonarji so živeli v duhu njihovega časa. Njihovo delo je temeljilo na tem, da krstijo čim več ljudi, nekateri so se ukvarjali s trgovino s sužnji in bogateli. Po drugi strani pa so se naučili lokalnega jezika, živeli med domačini, skrbeli za izobraževanje in bili so prvi jezikoslovci. Danes je večji poudar...

  15. Bitka Hrvata – bitka na Krbavskom polju 1493. godine

    OpenAIRE

    Kužić, Krešimir

    2014-01-01

    Autor u radu daje prikaz čimbenika koji su u interakciji doveli do najvećeg poraza hrvatske vojske u sukobima s Osmanskim Carstvom. Prikazan je jedan do sada neiskorišteni zapis o bitki, a zatim je napravljen osvrt na vojni ustroj Osmanlija čiji je izdanak bio Jakub-paša Hadum. Na hrvatskoj strani nije bilo ni jedinstva, ni naoružanja, ni uvježbane vojske, a ni osigurane opskrbe. Kad se tome pridoda naivna taktika bana Derencsényija, uz takve okolnosti poraz Hrvata bio je jedini mogući ishod....

  16. 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.

  17. VPLIV IZVORA NADZOROVANJA NA NEKATERE DEJAVNIKE PRI DELU REVIZORJEV

    OpenAIRE

    Voje, Melita

    2012-01-01

    Izvor nadzorovanja (angl. Locus of Control) je psihološki pojem, ki ločuje posameznike na tiste s poudarjenim notranjim izvorom nadzorovanja – internaliste, in tiste s poudarjenim zunanjim izvorom nadzorovanja – eksternaliste. Razlika med njimi je v prepričanju, da kar se jim v življenju dogaja, je pri enih posledica njihovega lastnega napora, vloženega znanja, truda, pri drugih pa posledica sreče, usode. V drugem delu naloge smo opredelili pojem izvora nadzorovanja ter način ugotavljanja...

  18. Brain Na+, K+-ATPase Activity In Aging and Disease

    Science.gov (United States)

    de Lores Arnaiz, Georgina Rodríguez; Ordieres, María Graciela López

    2014-01-01

    Na+/K+ pump or sodium- and potassium-activated adenosine 5’-triphosphatase (Na+, K+-ATPase), its enzymatic version, is a crucial protein responsible for the electrochemical gradient across the cell membranes. It is an ion transporter, which in addition to exchange cations, is the ligand for cardenolides. This enzyme regulates the entry of K+ with the exit of Na+ from cells, being the responsible for Na+/K+ equilibrium maintenance through neuronal membranes. This transport system couples the hydrolysis of one molecule of ATP to exchange three sodium ions for two potassium ions, thus maintaining the normal gradient of these cations in animal cells. Oxidative metabolism is very active in brain, where large amounts of chemical energy as ATP molecules are consumed, mostly required for the maintenance of the ionic gradients that underlie resting and action potentials which are involved in nerve impulse propagation, neurotransmitter release and cation homeostasis. Protein phosphorylation is a key process in biological regulation. At nervous system level, protein phosphorylation is the major molecular mechanism through which the function of neural proteins is modulted in response to extracellular signals, including the response to neurotransmitter stimuli. It is the major mechanism of neural plasticity, including memory processing. The phosphorylation of Na+, K+-ATPase catalytic subunit inhibits enzyme activity whereas the inhibition of protein kinase C restores the enzyme activity. The dephosphorylation of neuronal Na+, K+-ATPase is mediated by calcineurin, a serine / threonine phosphatase. The latter enzyme is involved in a wide range of cellular responses to Ca2+ mobilizing signals, in the regulation of neuronal excitability by controlling the activity of ion channels, in the release of neurotransmitters and hormones, as well as in synaptic plasticity and gene transcription. In the present article evidence showing Na+, K+-ATPase involvement in signaling pathways

  19. Problemas Respiratórios do Sono na Paralisia Cerebral

    OpenAIRE

    Estêvão, M. Helena

    2014-01-01

    Os problemas inerentes à função respiratória são comuns na Paralisia Cerebral, sendo a frequência daqueles proporcional ao grau de severidade da Paralisia Cerebral.A hipotonia fisiológica da musculatura faríngea que ocorre durante o sono é agravada na Paralisia Cerebral pela fraqueza muscular própria desta situação. Esta fraqueza pode ainda ser exacerbada pelos sedativos que, com frequência, são administrados pelos problemas do ritmo do sono. Estes condicionantes associados à dificuldade de m...

  20. Neutral pion form factor measurement at NA62

    CERN Document Server

    Goudzovski, Evgueni

    2016-01-01

    The NA62 experiment at CERN collected a large sample of charged kaon decays with a highly efficient trigger for decays into electrons in 2007. The kaon beam represents a source of tagged neutral pion decays in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from $1.05\\times10^6$ fully reconstructed $\\pi^0$ Dalitz decay is presented. The limits on dark photon production in $\\pi^0$ decays from the earlier kaon experiment at CERN, NA48/2, are also reported.

  1. Two Na+ Sites Control Conformational Change in a Neurotransmitter Transporter Homolog.

    Science.gov (United States)

    Tavoulari, Sotiria; Margheritis, Eleonora; Nagarajan, Anu; DeWitt, David C; Zhang, Yuan-Wei; Rosado, Edwin; Ravera, Silvia; Rhoades, Elizabeth; Forrest, Lucy R; Rudnick, Gary

    2016-01-15

    In LeuT, a prokaryotic homolog of neurotransmitter transporters, Na(+) stabilizes outward-open conformational states. We examined how each of the two LeuT Na(+) binding sites contributes to Na(+)-dependent closure of the cytoplasmic pathway using biochemical and biophysical assays of conformation. Mutating either of two residues that contribute to the Na2 site completely prevented cytoplasmic closure in response to Na(+), suggesting that Na2 is essential for this conformational change, whereas Na1 mutants retained Na(+) responsiveness. However, mutation of Na1 residues also influenced the Na(+)-dependent conformational change in ways that varied depending on the position mutated. Computational analyses suggest those mutants influence the ability of Na1 binding to hydrate the substrate pathway and perturb an interaction network leading to the extracellular gate. Overall, the results demonstrate that occupation of Na2 stabilizes outward-facing conformations presumably through a direct interaction between Na(+) and transmembrane helices 1 and 8, whereas Na(+) binding at Na1 influences conformational change through a network of intermediary interactions. The results also provide evidence that N-terminal release and helix motions represent distinct steps in cytoplasmic pathway opening.

  2. Two Na+ Sites Control Conformational Change in a Neurotransmitter Transporter Homolog*

    Science.gov (United States)

    Tavoulari, Sotiria; Margheritis, Eleonora; Nagarajan, Anu; DeWitt, David C.; Zhang, Yuan-Wei; Rosado, Edwin; Ravera, Silvia; Rhoades, Elizabeth; Forrest, Lucy R.; Rudnick, Gary

    2016-01-01

    In LeuT, a prokaryotic homolog of neurotransmitter transporters, Na+ stabilizes outward-open conformational states. We examined how each of the two LeuT Na+ binding sites contributes to Na+-dependent closure of the cytoplasmic pathway using biochemical and biophysical assays of conformation. Mutating either of two residues that contribute to the Na2 site completely prevented cytoplasmic closure in response to Na+, suggesting that Na2 is essential for this conformational change, whereas Na1 mutants retained Na+ responsiveness. However, mutation of Na1 residues also influenced the Na+-dependent conformational change in ways that varied depending on the position mutated. Computational analyses suggest those mutants influence the ability of Na1 binding to hydrate the substrate pathway and perturb an interaction network leading to the extracellular gate. Overall, the results demonstrate that occupation of Na2 stabilizes outward-facing conformations presumably through a direct interaction between Na+ and transmembrane helices 1 and 8, whereas Na+ binding at Na1 influences conformational change through a network of intermediary interactions. The results also provide evidence that N-terminal release and helix motions represent distinct steps in cytoplasmic pathway opening. PMID:26582198

  3. [Effects of NaCl stress on cation contents in different pumpkin cultivars' seedlings].

    Science.gov (United States)

    Li, Wei-Xin; Chen, Gui-Lin; Ren, Liang-Yu; Wang, Peng

    2008-03-01

    With the seedlings of 19 pumpkin cultivars as test materials, this paper studied the variations of Na+, K+, Ca2+, Na+/K+, Na+/Ca2+, SN+, K+ and SNa+, ca2+ in their shoots and roots under the stress of 300 mmol NaCl x L(-1). The results showed that after an 8-day exposure to 300 mmol NaCl x L(-1), the Na+ content in the seedlings increased significantly while the K+ content decreased, resulting in the brokenness of ion balance. The root Na+ content, shoot Na+/K+ and Na+/Ca2+ ratios, and SNa+, K+ and SNa+, Ca2+ of Cucurbita moschata (Q1) were significantly higher than those of C. maxima (H2) and C. ficifolia (H3). The variation tendency of these parameters of different pumpkin cultivars' seedlings were nearly consistent with the salt injury index of the seedlings under NaCl stress, which further proved that the strong salt-tolerance of Q1 was related to the lower values of shoot Na+/K+, Na+/Ca2+, SNa+, K+ and SNa+, Ca2+, and the high contents of K+ and Ca2+, while the salt-sensitivity of H2 and H3 was related to the higher values of shoot Na+/K+, Na+/Ca2+, SNa+, K+ and SNa+, Ca2+, and low contents of K+ and Ca2+ under NaCl stress.

  4. A INFLUÊNCIA CULTURAL NA FISIOLOGIA DO CORPO SEXUADO VINVULADO À HEGEMONIA MASCULINA NA DIVISÃO SEXUAL DO TRABALHO NA ARBITRAGEM EM FUTEBOL

    Directory of Open Access Journals (Sweden)

    Ineildes Calheiro Santos

    2014-06-01

    Full Text Available Com a temática das diferenças físicas entre os sexos e a problemática do androcentrismo na fisiologia do corpo sexuado, relativo á fragilidade versus força física sexualmente inata, utilizados como dispositivo de poder na divisão sexual do esporte, no futebol, embora que exista a presença maciça de homens arbitrando jogos, as mulheres vêm gradativamente ocupando este espaço profissional, mas, quando nos debruçamos no aparato institucional que regulamenta as normas para o campo de arbitragem, nota-se que existe fortemente um apelo ao dimorfismo sexual. Portanto, esse estudo, resultado de indagações concernentes á pesquisa de mestrado em desenvolvimento, cujo objeto, enfoca a participação das mulheres na arbitragem do futebol brasileiro, no âmbito do trabalho e nos limites do poder, tendo como liame, o sexo na ótica do desempenho físico, tem como objetivo discutir sobre a influência cultural nos comportamentos dos corpos sexuados, tentando perceber como a perspectiva feminista sobre tecnologia de gênero poderá favorecer na compreensão das histórias de vida das mulheres árbitras de futebol, que se submeteram aos testes físicos da seleção de arbitragem. A partir de um olhar feminista e pós-estruturalista, que busca desestabilização de paradigmas biológicos/naturais, partimos dos seguintes questionamentos: de que forma o processo cultural influencia nas diferenças físicas entre os sexos e na divisão sexual do trabalho desportivo? E como pensar na equidade social de gênero, a partir da igualdade física entre os sexos? Teórica e metodologicamente, foi realizada uma análise crítica focando teorias culturais, feministas e biológicas, onde refletimos sobre o corpo/sexo construído, comportamentos fisiológicos adquiridos e a divisão sexual no mercado futebolístico, conectados à tecnologia de gênero e ao poder. A priori, constatamos o androcentrismo e a resistência á abertura do campo para as mulheres, uma

  5. A separação das famílias na Shoah: vínculos na memória e na identidade judaica

    Directory of Open Access Journals (Sweden)

    Sofia Débora Levy

    2015-11-01

    Full Text Available A desumanização dos judeus imposta pela política de Estado nazifascista enfocou, em seus marcos, o desmembramento familiar. Com esta medida, advinda de um olhar coisificado sobre os judeus, a fragilidade de suas defesas individuais e coletivas foi atingida em cheio. Esse esfacelamento é aqui ilustrado nos relatos de sobreviventes que viveram as dolorosas  separações impostas às famílias judias durante o Holocausto, em condições dilemáticas e traumatizantes. O vazio dessas perdas familiares é parte significativa da identidade e da memória coletiva do povo judeu na contemporaneidade, que busca aludir aos que pereceram dando-lhes um lugar em suas memórias e na retransmissão da história da Shoah.

  6. Late Na+ current produced by human cardiac Na+ channel isoform Nav1.5 is modulated by its beta1 subunit.

    Science.gov (United States)

    Maltsev, Victor A; Kyle, John W; Undrovinas, Albertas

    2009-05-01

    Experimental data accumulated over the past decade show the emerging importance of the late sodium current (I(NaL)) for the function of both normal and, especially, failing myocardium, in which I(NaL) is reportedly increased. While recent molecular studies identified the cardiac Na(+) channel (NaCh) alpha subunit isoform (Na(v)1.5) as a major contributor to I (NaL), the molecular mechanisms underlying alterations of I(NaL) in heart failure (HF) are still unknown. Here we tested the hypothesis that I(NaL) is modulated by the NaCh auxiliary beta subunits. tsA201 cells were transfected simultaneously with human Na(v)1.5 (former hH1a) and cardiac beta(1) or beta(2) subunits, and whole-cell patch-clamp experiments were performed. We found that I(NaL) decay kinetics were significantly slower in cells expressing alpha + beta(1) (time constant tau = 0.73 +/- 0.16 s, n = 14, mean +/- SEM, P < 0.05) but remained unchanged in cells expressing alpha + beta(2) (tau = 0.52 +/- 0.09 s, n = 5), compared with cells expressing Na(v)1.5 alone (tau = 0.54 +/- 0.09 s, n = 20). Also, beta(1), but not beta(2), dramatically increased I(NaL) relative to the maximum peak current, I(NaT) (2.3 +/- 0.48%, n = 14 vs. 0.48 +/- 0.07%, n = 6, P < 0.05, respectively) and produced a rightward shift of the steady-state availability curve. We conclude that the auxiliary beta(1) subunit modulates I(NaL), produced by the human cardiac Na(+) channel Na(v)1.5 by slowing its decay and increasing I(NaL) amplitude relative to I(NaT). Because expression of Na(v)1.5 reportedly decreases but beta(1) remains unchanged in chronic HF, the relatively higher expression of beta(1) may contribute to the known I(NaL) increase in HF via the modulation mechanism found in this study.

  7. A estética do corpo na filosofia e na arte da Idade Média: texto e imagem

    Directory of Open Access Journals (Sweden)

    Ricardo Luiz Silveira da Costa

    2012-01-01

    Full Text Available A ideia de beleza - e sua consequente fruição estética - variou conforme as transformações das sociedades humanas, no tempo. Durante a Idade Média, coexistiram diversas concepções de qual era o papel do corpo na hierarquia dos valores estéticos, tanto na Filosofia quanto na Arte. Nossa proposta é apresentar a estética do corpo medieval que alguns filósofos desenvolveram em seus tratados (particularmente Isidoro de Sevilha, Hildegarda de Bingen, João de Salisbury, Bernardo de Claraval e Tomás de Aquino, além de algumas representações corporais nas imagens medievais (iluminuras e esculturas, e assim analisar o tema em três vertentes: a o corpo como cárcere da alma, b o corpo como instrumento, e c o corpo como desregramento.

  8. Structural requirements of Na+-dependent antidopaminergic agents: Tropapride, Piquindone, Zetidoline, and Metoclopramide Comparison with Na+-independent ligands

    Science.gov (United States)

    Collin, Sonia; Vercauteren, Daniel P.; Vanderveken, Didier; Evrard, Guy; Durant, François

    1989-03-01

    Molecular graphic design coupled with PCILO and crystallographic results have been used to investigate the three-dimensional structure of Tropapride, Piquindone, Zetidoline, and Metoclopramide, four dopamine D-2 receptor antagonists showing Na+-dependent binding. Three putative pharmacophoric elements, a nitrogen lone pair, a phenyl ring and a carbonyl moiety, are similarly oriented in all the Na+-dependent drugs. Conversely, for Na+-independent analogs, the two latter pharmacophoric elements play a subordinate role, but two Π-electron regions are systematically localized on the other side of the molecule: the first is a phenyl group while the second is a carbonyl function as in butyrophenones, a cyano group as in R48455, or a phenyl ring as in diphenylbutylpiperidines or tricyclics. The presence of a benzyl ring on this side in Tropapride might explain its weak extrapyramidal effects.

  9. Interfaces proteína-proteína: un nuevo tipo de diana terapéutica

    OpenAIRE

    Pujadas Lorente, Montserrat

    2015-01-01

    En esta tesis se presentan las Interfaces Proteína-­Proteína como un Nuevo Tipo de Diana Terapéutica a explotar, a través del estudio de un sistema de dos proteínas implicado en la quimiotaxis bacteriana: CheA/CheY. En la segunda parte de la tesis, presentamos la regulación alostérica por fosforilación en HDAC8, a través de esta proteína poco conocida todavía, queremos vislumbrar el método de propagación que sigue a la entrada del fosfato en el lugar alostérico, y cómo en última instancia est...

  10. Evidence for the involvement of Ala 166 in coupling Na(+) to sugar transport through the human Na(+)/glucose cotransporter

    DEFF Research Database (Denmark)

    Meinild, A K; Loo, D D; Hirayama, B A;

    2001-01-01

    to MTSEA and MTSET, but not MTSES, abolished sugar transport. Accessibility of A166C to alkylating reagents was independent of protein conformation, indicating that the residue is always accessible from the extracellular surface. Sugar and phlorizin did not protect the residue from being alkylated......We mutated residue 166, located in the putative Na(+) transport pathway between transmembrane segments 4 and 5 of human Na(+)/glucose cotransporter (hSGLT1), from alanine to cysteine (A166C). A166C was expressed in Xenopus laevis oocytes, and electrophysiological methods were used to assay function....... The affinity for Na(+) was unchanged compared to that of hSGLT1, whereas the sugar affinity was reduced and sugar specificity was altered. There was a reduction in the turnover rate of the transporter, and in contrast to that of hSGLT1, the turnover rate depended on the sugar molecule. Exposure of A166C...

  11. O pensamento de Martim Lutero sobre razão e revelação na Igreja, na política e na economia

    Directory of Open Access Journals (Sweden)

    Wilhelm Wachholz

    2016-12-01

    Full Text Available Razão e revelação ocupam lugar destacado na teologia de Martim Lutero, reformador da Igreja no século XVI. A correta relação entre razão e revelação não somente tem implicações teológicas, mas também práticas em relação à Igreja, política e economia. O objetivo deste artigo é analisar a relação de razão e revelação na teologia de Lutero, em diálogo com Paul Tillich, focando a pergunta pelo conhecimento de Deus e as implicações para Igreja, política e economia. Introdutoriamente, o artigo aborda a problemática do conhecimento. A partir disso, analisa a compreensão de Lutero sobre conhecimento a partir da revelação de Deus na cruz como sub contraria specie. Considerando ter o pecado afetado o conhecimento de Deus e, consequentemente, as relações humanas, o artigo analisa como, para Lutero, Igreja, economia e política precisam ser compreendidos e conclui com as implicações ministeriais do ser humano cristão, considerando os dois reinos, nos três estamentos.

  12. K+ and Na+ Contents in Plants of Muskmelon Varieties under NaCl Stress%NaCl对不同甜瓜品种植株中K+和Na+含量的影响

    Institute of Scientific and Technical Information of China (English)

    王澍; 朱春燕; 俞晨玺; 沈丹婷; 王黎敏; 牛庆良; 黄丹枫

    2011-01-01

    The absorbability and distributions of Na+ ,K+ in different organs of four muskmelon varieties, salty tolerance varieties (Haimisihao, Bingxuecui) and salty sensitive varieties ( Yulu、 Xiulv), were investigated under NaCl stress (75,150,225,300 mmol/L) in artificially controlled conditions. The results indicated that the Na+ content in the root,stalk,leave and fruit of the tolerant muskmelon was significantly lower than those of salt sensitive muskmelon with the increase of the NaCl concentraion. However, the K+ content in salt tolerant muskmelon root was significantly lower than that in the salt sensitive muskmelon root. Na+/K+ values in the stalk, leave and fruit of salty tolerant muskmelon was significantly lower than that in sensitive muskmelon though no significant difference of Na+/K+ was found in the root of salty tolerant and salt sensitive muskmelon. No significant difference was indicated in the amount of dry matter including root,shoot,leaves and fruits of all salty tolerant muskmelon. The minimum decreased weight of single fresh fruit and dry matter was detected in the salty tolerant muskmelon "Bingxuecui" while the maximum decreased weight of single fresh fruit and dry matter was found in the sensitive tolerant muskmelon "Xiulv".%用75、150、225和300 mmol/L的NaCl对耐盐性不同的4个甜瓜品种——耐盐品种:“海蜜四号(网纹)”、“冰雪脆(光皮)”,敏感品种:“玉露(网纹)”、“秀绿(光皮)”进行处理,研究不同甜瓜品种根、茎、叶和果实中的K+和Na+含量的变化.结果表明:随着NaCl浓度升高,甜瓜耐盐品种根、茎、叶和果实中Na+含量均低于盐敏感品种,而根中K+含量降低幅度显著小于盐敏感品种;耐盐品种茎、叶和果实中Na+/K+比值显著低于盐敏感品种,而根中无显著变化.从植株干重中可知,耐盐品种在任何浓度下都无显著变化,而盐敏感品种都下降.耐盐品种“冰雪脆”的单果鲜重和干重下降幅度最

  13. Na+-dependent and Na+-independent betaine transport across the apical membrane of rat renal epithelium.

    Science.gov (United States)

    Cano, Mercedes; Calonge, María L; Ilundáin, Anunciación A

    2015-10-01

    The low renal excretion of betaine indicates that the kidney efficiently reabsorbs the betaine filtered by the glomeruli but the mechanisms involved in such a process have been scarcely investigated. We have detected concentrative and non-concentrative betaine transport activity in brush-border membrane vesicles (BBMV) from rat renal cortex and medulla. The concentrative system is the Sodium/Imino-acid Transporter 1 (SIT1) because it is Na+- and Cl--dependent, electrogenic and is inhibited by an anti-SIT1 antibody. Its apparent affinity constant for betaine, Kt, is 1.1±0.5 mM and its maximal transport velocity, Vmax, 0.5±0.1 nmol betaine/mg protein/s. Inhibitors of the Na+/Cl-/betaine uptake are L-proline (75%) and cold betaine, L-carnitine and choline (40-60%). Neither creatine, TEA, taurine, β-alanine, GABA nor glycine significantly inhibited Na+/Cl-/betaine uptake. The non-concentrative betaine transport system is Na+- and H+-independent, electroneutral, with a Kt for betaine of 47±7 μM and a Vmax of 7.8±1 pmol betaine/mg protein/s. Its transport activity is nearly abolished by betaine, followed by L-carnitine (70-80%) and proline (40-50%), but a difference from the Na+/Cl-/betaine transport is that it is inhibited by TEA (approx. 50%) and unaffected by choline. The underlying carrier functions as an antiporter linking betaine entry into the BBMV with the efflux of either L-carnitine or betaine, an exchange unaffected by the anti-SIT1 antibody. As far as we know this is the first work reporting that betaine crosses the apical membrane of rat renal epithelium by SIT1 and by a Na+- and H+-independent transport system.

  14. Recovery of Al and Na Values from Red Mud by BaO-Na2CO3 Sinter Process

    Directory of Open Access Journals (Sweden)

    S.N. Meher

    2011-01-01

    Full Text Available The red mud BaO-Na2CO3 sinter process can be used in combination with the Bayer process to recover sodium and aluminium from the red mud waste and direct it back to the process stream. This is facilitated by the high temperature reaction of BaO-Na2CO3 and De-silication product (Sodalite (DSP in the red mud to produce an insoluble di-barium silicate, barium titanate, barium ferrite and a soluble sodium aluminate. A variation of the red mud BaO-Na2CO3 sintering process using half the barium oxide of existing methods has been investigated. The barium to silicon ratio was reduced from 2 to 1 producing a sodium barium silicate (Na2BaSiO4 rather than the di-barium silicate (Ba2SiO4 insoluble phase produced in the existing BaO-Na2CO3 sinter method. Synthetic BaO-Na2CO3 sinter products were investigated to understand the phases produced during sintering at varying temperatures and the chemistry of extraction. The target phases and morphological behaviors of sinter products were seen in XRD and SEM and the highest extractions were produced from a sinter temperature of 1000 °C for 4 h. A two-stage (105 °C / 60 min, 105 °C / 240 min water or caustic leaching process was found to be most effective for extraction. Sodium and aluminium extractions were 99% and 99.5% respectively. The experimental method devised was then used to treat red mud and the target phases were produced. An extraction of sodium and aluminium of 94% and 87% respectively was achieved. Silicon extractions were below 2%. Production benefits include sodium hydroxide savings, liquor burning, increased aluminium extraction and reduced cost of waste handling.

  15. The loss of Na and Cl during the pyrolysis of a NaCl-loaded brown coal sample

    Energy Technology Data Exchange (ETDEWEB)

    Mody, D.; Li, C.Z.

    1999-07-01

    A Victorian brown coal was physically loaded with NaCl and pyrolyzed in a quartz fluidized-bed reactor. The fluidized-bed reactor was equipped with a quartz frit in the freeboard zone to enable the total devolatilization of the coal particles. The introduction of NaCl into the coal has caused only minor reductions in the weight loss. A significant amount of chlorine was volatilized during pyrolysis at temperatures as low as 200 C. At temperatures around 400--500 C where the loss of sodium was not very significant, about 70% of chlorine was volatilized from the coal particles. With the volatilization of chlorine at this temperature level, sodium must have been bonded to the char matrix. With increasing temperature, the volatilization of chlorine decreased and then increased again, whereas the volatilization of sodium increased monotonically with increasing temperature. Almost all the Na in coal could be volatilized at temperatures higher than about 800 C. These experimental results clearly indicate that chlorine and Na interacted strongly with coal/char at high temperatures. Na and Cl in the coal did not volatilize as NaCl molecules. Significant amounts of species containing a COO-group such as acetate, formate and oxalate were observed in the pyrolysis products although the exact forms of these species (i.e., as acids, salts or esters) in the pyrolysis product remain unknown. The yields of the species containing a COO-group decreased with increasing temperature, possibly due to the intensified thermal cracking reactions at high temperatures.

  16. Acerca do elemento diferencial na Genealogia de Nietzsche na interpretação de Deleuze

    Directory of Open Access Journals (Sweden)

    Tiago Rickli

    2010-12-01

    Full Text Available Na primeira parte da obra Nietzsche e a Filosofia intitulada “O Trágico”, Deleuze abre sua leitura do pensamento de Nietzsche interrogando o conceito de genealogia. A escolha feita pelo pensador transparece uma tentativa de elucidação preliminar do método nietzschiano: nas suas incursões pela busca da proveniência das diversas morais, “das condições e circunstâncias nas quais nasceram”, Nietzsche desenvolve um método para escrutar os solos nos quais os valores são gerados e avaliá-los em seu preciso ponto de criação e ulterior desenvolvimento: “sob que condições o homem inventou para si os juízos de valor “bom” e “mal”? E que valor têm eles? Obstruíram ou promoveram até agora o crescimento do homem?”. Enfatizando a iniciativa nietzschiana de importar os conceitos de sentido e valor à filosofia, Deleuze investiga, nos primeiros movimentos do seu ensaio, a problemática dos valores, ruminando como Nietzsche inaugura uma filosofia dos valores até então sem precedentes e realiza uma “crítica total”. Para que se compreenda o alcance que os valores envergam como componentes elementares na investigação, um esclarecimento de sua natureza é promovido: como são esses valores mesmos? De acordo com Deleuze, por um lado, os valores fundamentam princípios, componentes essenciais a partir dos quais uma apreciação compõe-se, pontuando uma perspectiva de estimação. Todavia, esses valores têm procedência de uma avaliação da qual eles mesmos derivam seus respectivos valores. Em uma relação mais profunda, os valores referentes a uma respectiva apreciação são eles mesmos oriundos de uma criação crítica (avaliativa, que agrega um valor ao fenômeno avaliado. Eis que se mostra a nós a questão que procuramos: perguntar-se pelo valor dos valores é interrogar a proveniência dos valores, perscrutar seu momento de emergência. Em sua criação, há o ato de concepção de uma perspectiva crítica da

  17. A ética na sociedade, na área da informacao e da atuac~a

    OpenAIRE

    Quiñones Torres, Aída Julieta; Pontificia Universidad Javeriana

    2009-01-01

    Reseña del Libro: Ferreira Gomes, H.; Martins Bottentuit, A.; Espinheiro de Oliveira y M. O. (organizadoras) A ética na sociedade, na área da informação e da atuação profissional: o olhar da Filosofia, da Sociologia, da Ciência da Informação e da Formação e do Exercício Profissional do Bibliotecário no Brasil Brasilia: Conselho Federal de Biblioteconomia- Comissão de Ética Profissional, 2009, 192 p. isbn: 978-85-62568-01-5

  18. Proteína C reactiva: aspectos cardiovasculares de una proteína de fase aguda

    OpenAIRE

    Luis M. Amezcua-Guerra; Springall del Villar,Rashidi; Bojalil Parra,Rafael

    2007-01-01

    La proteína C reactiva (PCR) es una proteína inespecífica de fase aguda, utilizada como una medida de inflamación durante décadas. Recientemente se ha propuesto como un marcador de aterogénesis y como un predictor para el desarrollo de eventos cardiovasculares adversos a futuro. La PCR se une a lipoproteínas alteradas y facilita su remoción por los fagocitos, además de activar parcialmente el sistema del complemento. Los niveles elevados de PCR pueden producir efectos directos sobre las célul...

  19. Traumatologia desenvolvimental: o impacto da negligência na infância na memória de adultos

    OpenAIRE

    Grassi-Oliveira, Rodrigo

    2007-01-01

    INTRODUÇÃO: A traumatologia desenvolvimental é um termo proposto por De Bellis, (2001) e consiste na investigação sistemática do impacto psiquiátrico e psicobiológico de eventos adversos ao desenvolvimento infantil. A maioria dos estudos com animais utilizam modelos de privação materna para investigar o efeito do estresse precoce na resposta comportamental e neurobiológica de adultos, mas surpreendentemente o impacto psicobiológico das formas de negligência infantil são muito poucos investiga...

  20. A tomografia computadorizada na avaliação do comprometimento abdominal na paracoccidioidomicose

    Directory of Open Access Journals (Sweden)

    Roberto Martinez

    1988-06-01

    Full Text Available A tomografia computadorizada foi utilizada para avaliar o comprometimento abdominal em 25 doentes deparacoccidioidomicose. Existiam lesões intra-abdominais em, respectivamente, 75%e23% dos doentes com asformas aguda ("juvenil" e crônica ( do adulto '. A alteração mais freqüente foi o aumento dos gânglios linfáticos abdominais (12/25 casos; outras lesões foram: calcificação de gânglios linfáticos em 4 casos; obstrução das vias biliares em 5 doentes ictéricos; abscessos ou calcificação esplénica em 3 casos; 2 doentes mostraram lesões incomuns: aumento e irrgularidade do pâncreas em um e múltiplos abscessos nos músculos psoas em outro. Conclui-se que a tomografia computadorizada é procedimento útil na avaliação da disseminação da paracoccidioidomicose ao abdome e no diagnóstico de suas complicações abdominais.Computerised tomography was utilized in 25 paracoccidioidomycosis patients to evaluate abdominal involvement. This was observed in patients, 75% of acute (juvenile type and 23% of chronic (adult type patients. The most frequent alteration was abdominal lymphnode enlargement (12/25 cases. Other lesions consisted of lymphnode calcification in 4 cases, biliary tract obstruction in 5 icteric patients, splenic abscess or calcification in 3 cases. Two patients had unusual lesions: one with pancreatic enlargement and irregularity and other with multiple abscesses in both psoas muscles. It was concluded that computerised tomography is a useful procedure for evaluating paracoccidioidomycosis dissemination to the abdomen and for the diagnosis of its abdominal complications.

  1. A vigilância na contemporaneidade: seus significados e implicações na subjetividade

    Directory of Open Access Journals (Sweden)

    Angela Maria Pires Caniato

    2007-06-01

    Full Text Available O presente trabalho constitui uma pesquisa bibliográfica queproblematiza a questão da vigilância como prática social e ideologia,disseminada nas relações na sociedade e aceita pelos indivíduos,apesar de perigosas distorções de significados construídos pelaindústria cultural. Aproximam-se e equiparam-se os significadosde vigilância, cuidado, proteção e segurança. Essa equalização éuma estratégia ideológica da mídia para confundir os indivíduos.A fim de elucidar as diferenças de sentido entre essas categorias,investigaram-se os significados lingüístico e etimológico dessestermos. Resgatando-se etimologicamente a palavra “vigilância”, foipossível não só diferenciar vigilância e segurança, mas tambémidentificar características da prática social da vigilância, o queimpossibilitou-nos encará-la como cuidado ou segurança dapopulação. Analisamos, por fim, os mecanismos psíquicosenvolvidos devido à aceitação e reprodução da vigilância pelosindivíduos. A violência simbólica está implicada nesse processo ena repercussão de toda essa confusão simbólica nas relações sociaise nos vínculos afetivos.

  2. The symmetry problem in $NaV_{2}O_{5}$

    NARCIS (Netherlands)

    Damascelli, A.; Marel, D. van der; Jegoudez, J.; Dhalenne, G.; Revcolevschi, A.

    1998-01-01

    Published in: Physica B 259-261 (1999) 978-980 citations recorded in [Science Citation Index] Abstract: We discuss the symmetry of NaV2O5 in the high temperature phase on the basis of optical conductivity data. Conclusive information cannot be obtained by studying the optically allowed lattice vibra

  3. Search for Deconfinement in NA49 at the CERN SPS

    CERN Document Server

    Seyboth, P; Anticic, T; Barna, D; Bartke, Jerzy; Barton, R A; Betev, L; Bialkowska, H; Billmeier, A; Blume, C; Blyth, C O; Boimska, B; Botje, M; Bracinik, J; Bramm, R; Brun, R; Buncic, P; Cerny, V; Chvala, O; Cramer, J G; Csató, P; Dinkelaker, P; Eckardt, V; Filip, P; Fischer, H G; Fodor, Z; Foka, P Y; Freund, P; Friese, V; Gál, J; Gazdzicki, M; Georgopoulos, G; Gladysz-Dziadus, E; Hegyi, S; Höhne, C; Jones, P G; Kadija, K; Karev, A; Kolesnikov, V I; Kollegger, T; Kowalski, M; Kraus, I; Kreps, M; Van Leeuwen, M; Lévai, Peter; Malakhov, A I; Markert, C; Mayes, B W; Melkumov, G L; Mischke, A; Molnár, J; Nelson, J M; Pálla, G; Panagiotou, A D; Perl, K; Petridis, A; Pikna, M; Pinsky, L; Pühlhofer, F; Reid, J G; Renfordt, R E; Retyk, W; Roland, C; Roland, G; Rybicki, A; Sandoval, A; Sann, H; Schmitz, N; Siklér, F; Sitár, B; Skrzypczak, E; Squier, G T A; Stock, R; Ströbele, H; Susa, T; Szentpétery, I; Sziklai, J; Trainor, T A; Varga, D; Vassiliou, Maria; Veres, G I; Vesztergombi, G; Vranic, D; Wenig, S; Wetzler, A; Yoo, I K; Zaranek, J; Zimányi, J

    2003-01-01

    Experiment NA49 at the Cern SPS uses a large acceptance detector for a systematic study of particle yields and correlations in nucleus-nucleus, nucleon-nucleus and nucleon-nucleon collisions. Preliminary results for Pb+Pb collisions at 40, 80 and 158 A*GeV beam energy are shown and compared to measurements at lower and higher energies.

  4. A MORTE NA MARATONA: CELEBRAÇÃO DA VIDA

    Directory of Open Access Journals (Sweden)

    Rui Proença Garcia

    2010-01-01

    Full Text Available Neste breve ensaio os autores pretendem analisar a Maratona através de um marco teórico próximo da História das Religiões teorizada por Mircea Eliade e Julien Ries. Partem de uma possível ontologia da palavra Maratona, tentando compreender o seu significado na Grécia Antiga e na contemporaneidade. Analisaram a história da Maratona, os discursos de atletas, documentos escritos sobre esta competição desportiva, visionaram várias Maratonas em especial as de Londres e Nova Iorque, tendo concluído que na sua estrutura e nos seus comentários há símbolos religiosos que a aproximam de um ritual sagrado que tenta repetir o mito fundador. Na origem da Maratona está uma morte. Correr a Maratona e sobreviver significa ultrapassar a morte mítica, entrando-se numa condição humana superior, pelo que os concluem que correr ao Maratona o homem celebra a vida.

  5. Detector recycling leads NA62 to new standards

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

    The NA62 collaboration has just installed the first eight (out of 12) Large Angle Veto detectors for the accurate identification of photons. These subdetectors will re-use 3000 lead glass crystals with attached photomultipliers from the OPAL experiment at LEP – CERN’s former accelerator. This will give a second life to the crystals and is a great opportunity for the collaboration to save money while ensuring the required performance.   One of the LAV stations is lowered into the NA62 decay volume. The accurate identification of photons is a vital requirement of the whole NA62 physics programme. A failure in the system could lead to signals that mimic the very rare processes that the experiment is looking for, jeopardising the whole measurement. While it has not compromised on the overall performance of its detector, the NA62 collaboration has welcomed the challenge of re-using some existing equipment rather than developing new, more expensive solutions.  The tho...

  6. Small-Scale Interstellar Na I Structure Toward M92

    CERN Document Server

    Andrews, S M; Lauroesch, J T; Andrews, Sean M.; Meyer, David M.

    2001-01-01

    We have used integral field echelle spectroscopy with the DensePak fiber-optic array on the KPNO WIYN telescope to observe the central 27" x 43" of the globular cluster M92 in the Na I D wavelength region at a spatial resolution of 4". Two interstellar Na I absorption components are evident in the spectra at LSR velocities of 0 km/s (Cloud 1) and -19 km/s (Cloud 2). Substantial strength variations in both components are apparent down to scales limited by the fiber-to-fiber separations. The derived Na I column densities differ by a factor of 4 across the Cloud 1 absorption map and by a factor of 7 across the Cloud 2 map. Using distance upper limits of 400 and 800 pc for Cloud 1 and Cloud 2, respectively, the absorption maps indicate structure in the ISM down to scales of 1600 and 3200 AU. The fiber-to-fiber Na I column density differences toward M92 are comparable to those found in a similar study of the ISM toward the globular cluster M15. Overall, the structures in the interstellar components toward M92 have...

  7. A CRISE DAS IDENTIDADES NA AMÉRICA LATINA

    Directory of Open Access Journals (Sweden)

    Jonas Silva Abreu

    2013-12-01

    Full Text Available Em 1995, foi publicado o livro “Consumidores e Cidadãos” de Nestor Garcia Canclini. O livro trazia como tema a globalização e o consumo como agentes das transformações ocorridas no processo de elaboração das identidades coletivas no espaço latinoamericano. Tendo este texto como marco histórico-reflexivo, o objetivo do artigo é decifrar quais identidades foram produzidas no continente e entender a construção e negociação destes valores. Com o auxílio de outras obras, as identidades serão descritas tanto no contexto tradicional da modernidade constatadas na formação dos estados, nações e partidos políticos, mas também na ambiência multicultural da pós-modernidade que se fazem presentes nos discursos étnicos, atitudes religiosas e movimentos sociais em diferentes subgrupos. O trabalho pressupõe ainda que rádio, cinema, televisão e mais recentemente as redes de tecnologia e cultura transnacionais são meios que ajudaram a construir e alterar as identidades na região, além de elaborarem imagens e discursos sobre elas.

  8. O CONHECIMENTO NA ADMINISTRAÇÃO ESTRATÉGICA

    Directory of Open Access Journals (Sweden)

    Emeide Nóbrega Duarte

    2011-05-01

    Full Text Available No panorama da “Sociedade da Informação e do Conhecimento”, entende-se que as estratégias das organizações devem estar voltadas ao foco humano, pois o homem é o verdadeiro detentor do potencial de conhecimento que determinam a gestão estratégica. As atividades baseadas no conhecimento estão se tornando primordiais para as organizações. Nessa perspectiva, surge o interesse em buscar na literatura, subsídios para contextualizar o conhecimento na administração estratégica ao focalizar o processo de gestão estratégica por meio da abordagem das Escolas do Pensamento Estratégico. Com as leituras, foi possível perceber a presença do conhecimento através das pessoas que permeiam cada uma das abordagens. Na compreensão de abordar o uso do conhecimento como vantagem competitiva, está mais refletida nas premissas da escola de aprendizado, que compreende a estratégia como um processo de aprendizagem, tanto individual como coletivo. A vantagem competitiva do conhecimento consiste na exploração das competências distintivas, difíceis de serem imitadas. Competência, tanto individual como organizacional, só se adquire com conhecimento viabilizado pelo processo de aprendizagem contínua à luz da gestão do conhecimento.

  9. Rahvusvaheline bussiliiklus täna ja selle roll tulevikus

    Index Scriptorium Estoniae

    2004-01-01

    MootorReisi Aktsiaseltsi kümne aastaseks saamise puhul korraldati konverents "Rahvusvaheline bussiliiklus täna ja selle roll tulevikus". MootorReisi AS-i tekkimisest. Vt. samas: Intervjuu MootorReisi AS-i juhatuse esimees Hugo Osulaga

  10. Marketingový mix Restaurace Na chalupě

    OpenAIRE

    Kubíková, Martina

    2013-01-01

    Bakalářská práce se zaměřuje na rozbor marketingu a především marketingového mixu. Tedy na známé definice marketingu, marketingová prostředí a rozbor marketingového mixu, kde jsou zmapovány všechny jeho části (Produkt, Cena, Distribuce, Propagace, Fyzický důkaz, Lidé, Procesy). Z teoretických poznatků, které byly zjištěny v odborné literatuře, je vypracována praktická část. Zde je rozebrán marketingový mix Restaurace Na chalupě a zároveň tak i porovnání dvou provozovatelů, kteří se zde vystří...

  11. Exploring Neutron-Rich Oxygen Isotopes with MoNA

    CERN Document Server

    Frank, N; Bazin, D; Brown, J; DeYoung, P A; Finck, J E; Gade, A; Hinnefeld, J; Howes, R; Lecouey, J -L; Luther, B; Peters, W A; Scheit, H; Schiller, A; Thoennessen, M

    2007-01-01

    The Modular Neutron Array (MoNA) was used in conjunction with a large-gap dipole magnet (Sweeper) to measure neutron-unbound states in oxygen isotopes close to the neutron dripline. While no excited states were observed in 24O, a resonance at 45(2) keV above the neutron separation energy was observed in 23O.

  12. Installation of NA62 Large Angle Veto detectors

    CERN Multimedia

    2012-01-01

    In May 2012, the NA62 collaboration has installed the first eight (out of 12) Large Angle Veto detectors for the accurate identification of photons. These subdetectors will re-use 3000 lead glass crystals with attached photomultipliers from the OPAL experiment at LEP – CERN’s former accelerator.

  13. Rare and forbidden kaon decays at NA62

    Directory of Open Access Journals (Sweden)

    Pepe Monica

    2015-01-01

    The rare decays K+ → π+νν̅ are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleaness. The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking, keeping the background at the level of 10%.

  14. Altered erythrocyte Na-K pump in anorectic patients

    Energy Technology Data Exchange (ETDEWEB)

    Pasquali, R.; Strocchi, E.; Malini, P.; Casimirri, F.; Ambrosioni, E.; Melchionda, N.; Labo, G.

    1985-07-01

    The status of the erythrocyte sodium pump was evaluated in a group of patients suffering from anorexia nervosa and a group of healthy female control subjects. Anorectic patients showed significantly higher mean values of digoxin-binding sites/cell (ie, the number of Na-K-ATPase units) with respect to control subjects while no differences were found in the specific /sup 86/Rb uptake (which reflects the Na-K-ATPase activity) between the two groups. A significant correlation was found between relative weight and the number of Na-K-ATPase pump units (r = -0.66; P less than 0.0001). Anorectic patients showed lower serum T3 concentrations (71.3 +/- 53 ng/dL) with respect to control subjects (100.8 +/- 4.7 ng/dL; P less than 0.0005) and a significant negative correlation between T3 levels and the number of pump units (r = -0.52; P less than 0.003) was found. This study therefore shows that the erythrocyte Na-K pump may be altered in several anorectic patients. The authors suggest that this feature could be interrelated with the degree of underweight and/or malnutrition.

  15. Preparation of Na-zeolite with Kaolinite for Wastewater Treatment

    Institute of Scientific and Technical Information of China (English)

    LIU Qiongqiong; TAN Xin; SHAO Xiaolong

    2015-01-01

    Kaolinite as a raw material was modified to prepare a Na-zeolite productvia calcination and alkaline treat-ment. According to the measurement of the cation-exchange capacity, the prepared Na-zeolite product with an ammo-nium ion-exchange capacity of >75 mg/g can be used to remove ammonia nitrogen in water. The Na-zeolite products were characterized by scanning electron microscopy, infrared spectroscopy and X-ray diffraction, respectively. The re-finement of the structure was simulated by a software named Full Prof. The results show that the Si–O stretching vibra-tions of the prepared product in the range of 1008–1115 cm–1 disappear, only a small bend appears at 1103 cm–1 and the Al–OH vibration peaks at 912 cm–1 and 940 cm–1 both disappear. It is indicated that after calcination and alkaline treat-ment, the Si–O tetrahedral and Al–O octahedral structures are severely damaged, resulting in changes in the flexural vi-brations of Si–O and Al–OH. Kaolinite is a lamellar structure with the space group of C1, classified into a triclinic sys-tem, and cell parameters (such asa=0.5154 nm,b=0.8941 nm, andc=0.74 nm). Kaolinite with a lamellar structure is completely dissolved after calcination and alkaline treatment, resulting in the formation of Na-zeolite with a cage cubic structure.

  16. NaCl-KCl-Na2WO4共融体系的方波伏安法分析%Square wave voltammetry analysis of NaCl-KCl-Na 2WO4 communion system

    Institute of Scientific and Technical Information of China (English)

    廖春发; 房孟钊; 王旭; 汤浩; 罗林生

    2015-01-01

    采用三电极体系,应用方波伏安法分析NaCl-KCl-Na2WO4共融体系的电化学特性,重点研究了钨(Ⅵ)离子的电化学行为,结果表明:W(Ⅵ)→W(Ⅳ)还原过程的特征峰与 W(Ⅳ)→W的特征峰发生相互重叠, W(Ⅵ)离子的还原过程分2步,即:W(Ⅵ)→W(Ⅳ)→W,其中第1步W(Ⅵ)→W(Ⅳ)过程可逆,第2步W(Ⅳ)→W 过程不可逆。%Characteristics of NaCl-KCl-Na2WO4 communion system was analyzed by three-electrode system and square wave voltammetry, focusing on the electrochemical behavior of the tungsten ion (VI). The results show that the characteristic peak of reduction process of W (Ⅵ)→W (Ⅳ)and W (Ⅳ)→W is overlapping, and the reduction process of tungsten ion(VI) is divided into two steps, that is W (Ⅵ)→W(Ⅳ)→W, of which the first step is reversible, while the second step,W(IV)→W, is irreversible.

  17. Ekzamen na znanije Konstitutsii stanet sovremennõm / Ksenia Repson

    Index Scriptorium Estoniae

    Repson, Ksenia

    2008-01-01

    1. märtsis 2009 jõustuvast uuest kodakondsuse taotleja Eesti Vabariigi põhiseaduse ja ±Kodakondsuse seaduse¬ tundmise eksami läbiviimise korrast. Lisatud: registratsija na ekzamen ; poshli navstretshu shkolnikam ; sistema otsenivanija preterpit izmenenija

  18. A logica do mundo marginal na obra de Rubem Fonseca

    OpenAIRE

    Maria Lidia Lichtscheidl

    1986-01-01

    Resumo: A historia da publicação dos textos de Rubem Fonseca contem um marco essencial (a censura) que suscita o estudo dos textos da critica a respeito dessa obra...Observação: O resumo, na integra, podera ser visualizado no texto completo da tese digital Abstract: Not informed

  19. Neutron detection by large NaI crystal

    Science.gov (United States)

    Lavagno, A.; Gervino, G.

    2016-07-01

    In present days new neutron detection methods are under developed due to the global shortage of 3He and the toxicity of BF3. Neutrons can be indirectly detected by high-energy photons. The performance of a cylindrical NaI crystal, 4 in. diameter and 8 in. length as an indirect neutron detector has been investigated. Measurements were performed with 252Cf source with bare and shielded NaI detector. With a proper converter and moderator structure for the NaI detector, the detection efficiencies and the minimum detectable activities are improved, making the method very interesting for security applications. The indirect detection of neutrons by photons has several advantages. First, this method can in principle be suited by any gamma spectrometer with only slight modifications that do not compromise with its gamma spectrometry measurements. Second, fission neutron sources and neutron generators can be discriminated thanks to their different gamma energy spectra, a discrimination easily done by a NaI spectrometer.

  20. Search for Na+ Pickup Ion Generated Waves at Mercury

    Science.gov (United States)

    Boardsen, S. A.; Slavin, J. A.

    2007-05-01

    Telescopic observations by Potter et al. [2002] have discovered that Mercury's Sodium exosphere has a tail extending 10's of Mercury radii. Theory predicts that the shape of and the amount of Sodium [Smyth, 1986, 1995; Ip 1986, 1990] in this exospheric tail is highly dependent upon the true anomaly of Mercury. The exospheric Na that is not reabsorbed on Mercury's surface will be photo-ionized. Computations by Ip [1986] indicated that ionized exospheric Na could significantly mass load the plasma population in Mercury's magnetosphere. These freshly created ions will be rapidly energized by the convection electric field in Mercury's magnetosphere and sheath and should be highly unstable to the generation of plasma waves. These waves could play an important role in the thermalization and retention of the Na+. Because the gyro radii of Na+ can be comparable to the scale sizes in Mercury's geospace there is an open question whether Mercury's geospace can sustain such waves. After a brief review of what was observed in the Mariner 10 magnetometer data, we will present analytic calculations of the expected pickup ion distributions, the expected unstable waves, their frequencies, wavelengths and Doppler shifts, their variation with location in Mercury's geospace and Mercury's true anomaly for both high and low solar wind convection electric fields. We will assess if and when such waves can be generated and sustained.