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  1. Levantamento etnobotânico de plantas medicinais nos quintais do Bairro Novo Horizonte, Ituiutaba, MG

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    H.S.N Liporacci

    2013-01-01

    Full Text Available Apesar da maioria dos estudos etnobotânicos serem focados em populações tradicionais, as populações de áreas urbanas também vêm sendo investigadas. O presente trabalho realizou um levantamento etnobotânico de plantas medicinais nos quintais de um bairro urbano, próximo à zona rural, no município de Ituiutaba, MG, visando resgatar e identificar o conhecimento local a respeito das plantas medicinais. Para isso, 40 residências foram visitadas e os dados coletados por meio de entrevistas semi-estruturadas realizadas com os moradores. Foram encontradas 72 espécies de plantas medicinais, distribuídas em 33 famílias botânicas, destacando-se Asteraceae e Lamiaceae pelo número de espécies. As cinco espécies mais citadas pelos moradores foram: Mentha sp., Cymbopogon citratus, Sedum dendroideum, Plectranthus barbatus, e Rosmarinus officinalis. O hábito herbáceo foi predominante, e a parte da planta mais usada foi a folha, enquanto a decocção foi o modo de preparo mais frequente. Por mais que existam particularidades entre os diversos costumes e culturas das comunidades locais no Brasil, foi observada similaridade entre os resultados encontrados neste trabalho com outros levantamentos realizados, reforçando a importância da preservação e divulgação do conhecimento popular.

  2. Radioproteção, dose e risco em exames radiográficos nos seios da face de crianças, em hospitais de Belo Horizonte, MG

    National Research Council Canada - National Science Library

    Lacerda, Marco Aurélio de Sousa; Khoury, Helen Jamil; Silva, Teógenes Augusto da; Lacerda, Camila Maria de Sousa; Carmo, Alexandre Ferreira; Pereira, Márcio Tadeu

    2007-01-01

    ... pediátricos em hospitais de Belo Horizonte, MG, as condições de radioproteção, as técnicas radiográficas empregadas, o kerma no ar de entrada e as doses nos órgãos mais expostos. MATERIAIS E MÉTODOS...

  3. Radioproteção, dose e risco em exames radiográficos nos seios da face de crianças, em hospitais de Belo Horizonte, MG Radioprotection, doses and risks in the radiological assessment of paranasal sinuses in children, in hospitals of Belo Horizonte, MG

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    Marco Aurélio de Sousa Lacerda

    2007-12-01

    Full Text Available OBJETIVO: Avaliar a freqüência das incidências radiográficas realizadas nos seios da face de pacientes pediátricos em hospitais de Belo Horizonte, MG, as condições de radioproteção, as técnicas radiográficas empregadas, o kerma no ar de entrada e as doses nos órgãos mais expostos. MATERIAIS E MÉTODOS: Foram coletados os dados dos pacientes e parâmetros de técnica radiográfica empregados em exames de crianças de 1 a 16 anos de idade, em cinco salas de quatro hospitais da cidade, observando, também, aspectos de proteção radiológica. O kerma no ar de entrada foi estimado a partir dos rendimentos dos tubos de raios-x e as doses nos órgãos utilizando o software PCXMC. RESULTADOS: Os valores médios do kerma no ar de entrada para as cinco salas foram, respectivamente, 1.398 µGy, 829 µGy, 877 µGy, 1.168 µGy e 3.886 µGy para pacientes entre 1 e 5 anos de idade. CONCLUSÃO: Foi constatado que as incidências mento-naso e fronto-naso são comumente solicitadas em conjunto, na maioria dos hospitais, o que confere dose significativa para os pacientes. Os riscos para os pacientes podem ser diminuídos mediante a utilização de cilindros de colimação, a não-utilização de grades antiespalhamento, o emprego de altos valores de tensão e baixos valores de tempo.OBJECTIVE: The present study was aimed at evaluating the frequency of radiographic assessment of paranasal sinuses in pediatric patients in hospitals of Belo Horizonte, MG, Brazil. Additionally, aspects regarding radiation protection conditions and radiographic parameters were evaluated, and entrance air kerma and organ doses were estimated. MATERIALS AND METHODS: Patients' data and parameters of radiographic technique employed in the assessment of children in the age range between 1 and 16 years were collected in five examination rooms of four hospitals in Belo Horizonte, also taking into consideration the radiation protection aspects. Entrance air kerma calculation was

  4. Escorpionismo em Belo Horizonte, MG: um estudo retrospectivo

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    Soares Marcely Regina Martins

    2002-01-01

    Full Text Available Os escorpiões (Arachnida, Scorpiones, especialmente na área urbana, devido à grande densidade demográfica e possibilidade de confronto, representam risco à saúde pública. A espécie Tityus serrulatus é a mais importante, do ponto de vista médico, causando o maior número de acidentes. Objetivou-se levantar dados epidemiológicos e a ocorrência de acidentes escorpiônicos em Belo Horizonte, entre 1990 e 1997. Os dados foram obtidos no Hospital de Pronto Socorro João XXIII. Ocorreram 3265 acidentes, sendo a maioria em 1996. Aconteceram 6 acidentes fatais. Com maior incidência nos meses de janeiro, o sexo masculino, os membros superiores e a faixa etária entre 25 e 65 anos, foram os mais atingidos. Os resultados constituem importante subsídio para o controle do escorpionismo, pois delimitam as áreas mais atingidas e o perfil dos acidentados, permitindo campanhas educativas e de prevenção mais eficientes.

  5. [Scorpionism in Belo Horizonte, MG: a retrospective study].

    Science.gov (United States)

    Soares, Marcely Regina Martins; Azevedo, Cristiano Schetini; De Maria, Mário

    2002-01-01

    Scorpions, especially in urban areas, due to the great demographic density and confrontation possibility, represent a risk to the public health. Tityus serrulatus is the most important species, causing the highest number of accidents. This study intended to raise epidemic data and the occurrence of scorpionism in Belo Horizonte, between 1990 and 1997. The data were gathered from the records of Hospital de Pronto Socorro João XXIII. Of the 3265 cases, most occurred in 1996, of which six were fatal accidents. With greater incidence in January, the male sex, superior members and 25-65 year-old age group were the most affected. The results constitute an important tool for the control of scorpionism, since they delimit the areas most involved and the victims' profile, enabling more efficient and durable prevention educational campaigns.

  6. Inquérito sobre uso de medicamentos por idosos aposentados, Belo Horizonte,MG Survey on medicine use by elderly retirees in Belo Horizonte, Southeastern Brazil

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    Andréia Queiroz Ribeiro

    2008-08-01

    Full Text Available OBJETIVO: Caracterizar o uso de medicamentos por aposentados e pensionistas idosos, com ênfase nas diferenças entre gêneros. MÉTODOS: Inquérito domiciliar conduzido com amostra aleatória simples de 667 indivíduos com 60 anos ou mais, residentes em Belo Horizonte, MG, em 2003. Os idosos foram entrevistados por farmacêuticos, utilizando questionário padronizado. Foram estimadas a prevalência de uso e a média de medicamentos usados nos últimos 15 dias anteriores à entrevista, as quais foram estratificadas de acordo com o gênero segundo variáveis sociodemográficas e de saúde. RESULTADOS: A prevalência de uso de medicamentos foi de 90,1%, significativamente maior entre as mulheres (93,4% do que entre os homens (84,3%. Mulheres utilizaram em média 4,6±3,2 produtos e homens 3,3±2,6 (pOBJECTIVE: To describe self-reported use of medicines by Brazilian elderly retirees focusing on gender differences. METHODS: Household survey conducted in a random sample comprising 667 subjects aged 60 years or more who were living in Belo Horizonte, Southeastern Brazil, in 2003. The elderly were interviewed by pharmacists, using a standardized questionnaire. The prevalence of medicine use and mean use in the 15 days previous to the interview were estimated and then stratified by gender according to sociodemographic and health variables. RESULTS: The prevalence of medicine use was 90.1%, and significantly higher among women (93.4% than men (84.3%. Women and men took on average 4.6±3.2 and 3.3±2.6 products (p<0.001, respectively. The most frequently used drug category was cardiovascular, followed by nervous system and gastrointestinal tract and metabolism. Women showed higher use in all these drug categories, as well as higher mean number of drugs consumed, according to selected sociodemographic and health variables. CONCLUSIONS: The study identified higher use of medicines by women, making them more vulnerable to the harmful effects of polytherapy

  7. Horizonte

    OpenAIRE

    BABIANO MARTÍNEZ, CARLOS JOSÉ

    2015-01-01

    Este proyecto intenta ahondar en la idea de horizonte tratado desde la filosofía japonesa y de su nexo con el mundo occidental. De la necesidad latente de una restructuración de la educación para convertirla en una educación estética capaz de permitir a los individuos completarse plenamente como personas. A través de las enseñanzas orientales del zen, del haiku, de filósofos como Tanizaki, y sus ideas sobre la sombra y la sugerencia, frente a Kierkegaard o Schiller en el lado occidental y sus...

  8. Determinant factors of toothache in 8- and 9-year-old schoolchildren, Belo Horizonte, MG, Brazil

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    Eliane Paula Reis Barrêtto

    2009-06-01

    Full Text Available A cross-sectional study was carried out to determine the prevalence, severity and impact of toothache among schoolchildren associated with socio-demographic variables (gender, degree of maternal schooling, economic group, and oral health status. Six hundred and one 8- and 9-year-old children were randomly selected from schools in Belo Horizonte, MG, Brazil. After formal authorization was obtained from their parents, the children were interviewed and clinically examined by a single examiner. The Chi squared test was applied and the odds ratio obtained. The prevalence of toothache was 45.9% (276/601, of which 15.6% (94/601 had occurred during the previous month. Among the children who had experienced pain, 39.4% (109/276 classified its severity as intense or very intense. Nearly 35% (96/276 were awoken by the pain, and 63.8% (176/276 were unable to carry out daily tasks as a result. The prevalence of pain was greater among children from less privileged economic groups, in which the mothers' level of schooling was lower (0-7 years of formal study and who showed poorer conditions of oral health, determined by the presence of dental and periodontal pathology (p<0.05. Gender did not influence either the experience of toothache or its severity and impact. The prevalence of toothache found in the age group between 8 and 9 years is very high and associated to social determinants and poorer conditions of oral health.

  9. Health assessment of raptors in triage in Belo Horizonte, MG, Brazil

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    D de A Andery

    2013-09-01

    Full Text Available Falconiformes (n=82, Strigiformes (n=84 and Cathartiformes (n=14 at a triage center (CETAS-Belo Horizonte, IBAMA, Brazil were examined between 2008 and 2010 . No bird was reactive at hemagglutination-inhibition (HI for antibodies against Mycoplasma gallisepticum (Mg. Two Caracara plancus (2/68 had HI titers (16-32 against Newcastle disease virus. No Chlamydophila psittaci DNA was detected in the liver (PCR; n=95. Blood smears (Giemsa; n=89 and spleen fragments (PCR; n=82 were 13.5% and 8.5% positive, respectively, for Haemoproteus only. Necropsy of Cathartiformes (n=10, Falconiformes (n=42 and Strigiformes (n=57 showed that trauma injuries were the main cause (63.3% of admission and death, being fractures (38.5% of the thoracic limbs (57.1% the most frequent. Nematode (12.8%, cestode (1.8%, trematode (0.9%, and acanthocephalan (2.7% parasite infections were relevant. Mites (Acari were the most frequent (17.4% external parasites, particularly Ornithonyssus sylviarum in Asio clamator and Amblyomma cajennense in Tyto alba. Chewing lice (10.1% and Pseudolynchia spp. (9.2% were also found. Histomonas spp. (6.4% was found in the ceca of Bubo virginianus, Athene cunicularia, Tyto alba, and Asio clamator, but not in Falconiformes or Cathartiformes. Trichomonas spp. (oral cavity, pharynx and upper esophagus; 9.1% was detected in Falconiformes and Strigiformes, but not in Cathartiformes. Trichomonas spp. were found in A. cunicularia, Asio clamator, Glaucidium brasilianum and Tyto alba (Strigiformes, and in Rupornis magnirostris, Milvago chimachima, Falco femoralis, Falco sparverius and Caracara plancus (Falconiformes. Coccidia (9.1% (Sarcocystis spp., 6.4% and mycosis were observed in most Tyto alba (70%. The evaluated Orders may not pose risks for commercial poultry production. Habitat loss and urban adaptation may be increasingly affecting raptors.

  10. Atitudes e motivações em relação ao consumo de alimentos orgânicos em Belo Horizonte - MG Attitudes and motivations towards organic foods consumption in Belo Horizonte, MG

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    Luísa Mol Senna Andrade

    2012-05-01

    Full Text Available O objetivo deste estudo foi caracterizar o mercado consumidor de alimentos orgânicos em Belo Horizonte-MG, incluindo o perfil socioeconômico e o comportamento dos consumidores, sua percepção e seu conhecimento sobre alimentos orgânicos, além das principais motivações e limitações em relação ao consumo desses produtos. Uma pesquisa descritiva direta e estruturada (survey foi realizada com 400 consumidores de alimentos orgânicos, por meio da aplicação de questionários semiestruturados. A maioria dos consumidores era do gênero feminino (76,0%, com idade superior a 30 anos (90,3%, em união estável (81,3%, graduados (81,5% e com renda familiar elevada (acima de 12 S.M.⁄mês (78,7%. A maioria definiu alimento orgânico como um alimento isento de resíduos de agrotóxicos (69,7%. Alimentos orgânicos foram mencionados conter maiores níveis de nutrientes do que os convencionais (82,0%, além de serem isentos de organismos geneticamente modificados (75,0% e produtos químicos sintéticos (86,0%. A maioria mostrou preocupação em manter hábitos de vida saudáveis, sendo que 80,5% exercitavam-se regularmente e 49,2% já haviam feito alguma dieta ou recebido orientações nutricionais. Todos acreditavam nos benefícios à saúde advindos do consumo dos produtos orgânicos e quase a totalidade (98,8% já havia percebido melhorias na saúde em decorrência desse consumo. Somente 16,3% consumiam outros alimentos orgânicos além de frutas e hortaliças. A preocupação com a saúde, assim como o maior conteúdo de nutrientes e o sabor mais pronunciado do que os alimentos convencionais, foram as maiores motivações para o consumo de frutas e hortaliças orgânicas. Grande parte dos consumidores apresentou conhecimento superficial sobre a temática, o que evidenciou a necessidade de maiores esclarecimentos sobre o assunto. Uma demanda reprimida por tais produtos pôde ser observada, pois, apesar do grande interesse por alimentos org

  11. Psicologia nos núcleos de apoio à saúde da família em Belo Horizonte

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    Natália Silva Azevedo

    Full Text Available O artigo apresenta uma reflexão acerca do trabalho desenvolvido por psicólogas em Núcleos de Apoio à Saúde da Família (NASF de Belo Horizonte, e é motivado pela intenção de proporcionar maior conhecimento sobre a atuação desse profissional em novos cenários da Atenção Primária em Saúde. Sendo assim, pretendeu-se conhecer a atuação dos psicólogos nos NASF de Belo Horizonte, acompanhando seu processo de implantação. Para tanto, utilizou-se o método qualitativo de pesquisa, tendo sido realizadas revisão de literatura e análise de documentos governamentais afins à temática em estudo além de entrevistas semiestruturadas com sete psicólogas que atuam em equipes do NASF. Acompanhando o início do trabalho do NASF em Belo Horizonte e o direcionamento interdisciplinar de apoio às equipes de Saúde da Família (ESF, os dados sugerem que as práticas psi estão sendo construídas pelas equipes em campo. São produzidos diálogos entre os diversos saberes ali congregados, representados pelos profissionais de saúde dos Núcleos, entre as ESF e as equipes do NASF e entre as equipes de saúde e a própria população. Acredita-se que, nesses encontros, concepções e práticas diversas em saúde componham diálogos e debates profícuos.

  12. NOS INTRAMUROS DO LICEU: violência escolar em Belo Horizonte.

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    Paulo Tiego Gomes de Oliveira

    2016-12-01

    Full Text Available O artigo apresenta dados sobre fenômenos violentos resultantes de questões étnico-raciais no ambiente escolar de Belo Horizonte em 2014 e 2015. Identifica qual grupo étnico-racial figura como vítima mais recorrente de crimes e contravenções em escolas públicas do ensino médio na capital mineira. Observando a dinâmica que se constrói no cenário escolar diante das implicações étnico-raciais resultantes de preconceito e racismo, tem como referencial teórico Charlot, Gomes, Munanga, Soares e Teixeira. Utiliza leis em vigor, dentro dos temas de educação, racismo, preconceito e violência racial. A hipótese é que são os indivíduos de etnia negra (pardos e pretos os mais vitimizados. Utiliza a metodologia quantitativa, através da coleta de boletins de ocorrência policial buscando discutir e refletir sobre a possível naturalização da violência contra grupos étnico-raciais negros dentro do ambiente escolar.

  13. Ergonomics analysis of the productive environment of fashion clothing firm in Belo Horizonte-MG.

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    Pagnan, Andreia Salvan; Câmara, Jairo José Drummond

    2012-01-01

    A company making women's clothing, located in Belo Horizonte, Minas Gerais was studied in its ergonomic aspects with regard to the layout. With this study it was possible to establish the best positioning of machines and jobs of employees. The analysis criteria used were: frequency of use, functional grouping, sequence of use, flow and intensity of preferred connections. An ideal arrangement in the workplace provides improved manufacturing quality and employee performance and consequently higher production yields.

  14. Angle and rotational direction dependent horizontal loop shift in epitaxial Co/CoO bilayers on MgO(100

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    Andrea Ehrmann

    2017-11-01

    Full Text Available Co/CoO belongs to the typical exchange bias systems which have been investigated for decades. Surprisingly, Co/CoO thin film systems epitaxially grown on MgO(100 substrates show a strong influence of the relative orientation of the average uncompensated antiferromagnetic magnetization with respect to the cooling field direction, giving rise to unexpected asymmetric angular dependencies of the horizontal loop shift as well as the sign of the transverse magnetization peaks in magneto-optical Kerr effect (MOKE experiments. In this paper, we provide a broad overview of the influence of cooling field orientation and sample orientation on magnetization reversal processes in this system.

  15. Prevalência baixa de adenovírus em crianças com diarreia em Belo Horizonte-MG Low prevalence of adenoviruses in children with acute diarrhea in Belo Horizonte-MG

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    Ricardo Jenner Duarte

    2012-08-01

    Full Text Available INTRODUÇÃO: Diversos microrganismos são reconhecidos como agentes de diarreia aguda, entre eles, os adenovírus, cuja associação com a doença apresenta variações geográficas e é pouco conhecida no Brasil. OBJETIVOS: Investigar a presença de adenovírus em fezes de crianças com diarreia aguda e sem diarreia, em Belo Horizonte-MG, e estudar os fatores epidemiológicos associados à adenovirose intestinal. MATERIAL E MÉTODOS: O teste imunocromatográfico qualitativo (kit VIKIA® Rota-Adeno, bioMérieux foi utilizado para pesquisa de antígenos de adenovírus em amostras fecais obtidas de 268 crianças com diarreia aguda e 124 sem diarreia, em 2005 e 2006, no Hospital Infantil João Paulo II, Belo Horizonte-MG. Dados laboratoriais, clínicos e epidemiológicos foram registrados em banco de dados (SPSS Statistical package, IBM. RESULTADOS: Adenovírus foi detectado nas fezes de 16 crianças (4,1%: 12 (4,5% com diarreia e quatro (3,2% sem diarreia. A virose foi mais comum em meninas e a distribuição etária da infecção foi homogênea. Entre as 16 crianças com infecção pelo vírus, 11 (68,8% tinham até 12 meses de idade. Entretanto, diferença significativa não foi observada para os parâmetros analisados. Distribuição sazonal da infecção por adenovírus não foi detectada. CONCLUSÃO: Nossos dados demonstram que a prevalência da adenovirose é baixa na população pediátrica no nosso meio.INTRODUCTION: Several microorganisms, among them enteric adenovirus, are widely recognized as etiological agents of acute diarrhea. The association between adenovirus and the disease varies among geographical regions and is poorly known in Brazil. OBJECTIVES: To investigate the presence of adenovirus in stool samples from children with and without diarrhea in Belo Horizonte-MG. To study factors associated with enteric adenovirus infection. MATERIAL AND METHOD: A qualitative immunochromatographic assay (kit VIKIA® Rota-Adeno, bio

  16. Antimicrobial resistance and serotyping of Streptococcus pneumoniae isolated from pediatric patients in Belo Horizonte, MG, Brazil Resistência antimicrobiana e sorotipagem de Streptococcus pneumoniae isolado de pacientes pediátricos em Belo Horizonte, MG

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    Ana Paula Gomes de Oliveira Magalhães

    2003-07-01

    Full Text Available Thirty one Streptococcus pneumoniae invasive strains were isolated from a pediatric population in Belo Horizonte from June, 1999 to May, 2001. Penicillin, trimethoprim-sulfamethoxazole, tetracycline and chloramphenicol resistance rates for the isolates were 41.9, 58.1, 25.8 and 3.2%, respectively. Intermediate penicillin resistant (MICs between 0.1 and 1.0 µg/ml and resistant (MICs > 2.0 µg/ml isolates occured at rates of 38.7 and 3.2%, respectively. Resistance to erythromycin, ofloxacin, rifampin or vancomicyn was not detected. Ten S. pneumoniae serotypes (14, 5, 10 A, 6B, 15B, 18C, 6 A, 18 A, 19 A and 19 F were identified. Serotype 14 (12 out of 31 was predominant among the isolates. Penicillin and trimethoprim-sulfamethoxazole resistance was more common in 14 and 6B serotypes.Trinta e três linhagens invasivas do S. pneumoniae foram isoladas a partir de pacientes pediátricos em Belo Horizonte, MG, Brasil, de junho de 1999 a maio de 2001. As taxas de resistência à penicilina, ao trimetoprim-sultametoxazol, tetraciclina e cloranfenicol foram respectivamente, 41, 9; 58,1 e 3,2%. A resistência intermediária à penicilina (MICs entre 0,1 e 1,0 µg/ml e resistência total (MICs>2.0 µg/ml ocorreram, respectivamente, nas porcentagens de 38,7 e 3,2%. Não foi detectada resistência à eritromicina, ofloxacin, rifampina e vancomicina. Foram identificados 9 sorotipos do S. pneumoniae (14, 5, 10 , 6B, 15B, 18C, 6 A, 18 19 A e 19F entre os isolados. O sorotipo 14 (12 de 31 foi predominate entre os isolados. A resistência à penicilina e ao trimetoprim-sulfametoxazol estava sempre associada aos sorotipos 14 e 6B.

  17. Perfil dos cuidadores de idosos nas instituições de longa permanência de Belo Horizonte, MG Profile of caregivers of elderly in long-term care institutions in Belo Horizonte - MG

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    Marco Túlio de Freitas Ribeiro

    2008-08-01

    Full Text Available Este trabalho avaliou o perfil dos cuidadores de idosos das instituições de longa permanência filantrópicas e privadas de Belo Horizonte - MG. Uma amostra de 181 cuidadores, 98 em filantrópicas e 83 em privadas, foi aleatoriamente selecionada e submetida à entrevista estruturada, após assinatura do termo de consentimento livre e esclarecido. As variáveis avaliadas foram gênero, faixa etária, escolaridade, estado civil, remuneração mensal (em termos de salários mínimos, condição econômica, tempo de trabalho na instituição e tempo na função de cuidador. A comparação entre as modalidades de instituições foi realizada pelos testes qui-quadrado e exato de Fisher. Não houve diferença estatística significativa entre as modalidades de instituições quanto ao gênero (p=0,62 e remuneração mensal (0,77 dos cuidadores. Nas instituições filantrópicas, foi observado maior número de cuidadores com mais de 50 anos, com estado civil viúvo, com menos de quatro anos de estudo, de classe econômica D e que trabalhavam nas instituições e atuavam como cuidadores há mais de dois anos (pThe purpose of this cross-sectional study was to determine the profile of caregivers of elderly in long-term care facilities. The studied population included 181 randomly selected caregivers, 98 from philanthropic and 83 from private institutions in the city of Belo Horizonte. Data were collected applying structured questionnaires. The variables evaluated were sex, age group, educational level, marital status, income, economic condition, time of work in the facility, and professional experience. The data were compared using Chi-square and Fisher's exact tests. There was no statistically significant difference between caregivers from the two facilities with regard to sex (p=0.62 and income (0.77. In the philanthropic facilities we observed more caregivers aged 50 years or more, widowers, with less than 4 years of study, socio-economic level D and

  18. A saúde no cotidiano de jovens residentes em um bairro popular de Belo Horizonte, MG, Brasil

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    Natália de Cássia Horta

    2011-12-01

    Full Text Available Este estudo teve como objeto a saúde no cotidiano dos jovens considerando que esses não têm suas vivências cotidianas contempladas nas ações de saúde. O objetivo é analisar os modos de vida juvenis apreendendo os significados e sentidos da saúde em seu cotidiano. Trata-se de uma investigação qualitativa, fundamentada na dialética, com base na sociologia da vida cotidiana. Desenvolvida num bairro popular do município de Belo Horizonte, foi estruturada em fase exploratória e interpretativa, tendo como sujeitos dezenove jovens. Por meio da análise hermenêutica e dialética, a tese foi confirmada. As ações de cuidado presentes no cotidiano dos jovens levam em conta os recursos e os aspectos constitutivos da condição juvenil, ainda pouco contemplada nas proposições da área da saúde. No cotidiano dos jovens, tem-se a expressividade dos modos de vida e da condição juvenil na qual a saúde se revela pelo bem-estar e pelas condições básicas para o trilhar da vida. A concepção de saúde prevalente centra-se nos comportamentos e na corporeidade. Para a promoção da saúde juvenil é necessário partir dos modos de vida juvenis e interagir com eles no cotidiano. As ações de cuidado com a saúde têm um espaço de (invisibilidade na vida dos jovens e interagem com suas prioridades na vivência da condição juvenil. Revelou-se a importância da proposição de ações cuidadoras nos microespaços e no território em que se expressa essa condição.

  19. Conteúdo básico comum: ensino de arte em escolas públicas estaduais de Belo Horizonte/MG Common basic contents: teaching art in public schools in Belo Horizonte/MG

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    Pedro Pires Bessa

    2012-03-01

    Full Text Available Procuramos captar como se dá, na prática, a implementação do Conteúdo Básico Comum, o CBC, de Arte - atual Proposta Curricular do Estado - no primeiro ano do Ensino Médio, em duas escolas públicas estaduais localizadas na cidade de Belo Horizonte/MG. Optou-se por pesquisar somente escolas (pólo de Ensino Médio, uma classificada como Escola Referência, a outra, não. Visamos a mostrar as conclusões relativas à proposta pedagógica em Arte das escolas pesquisadas; o planejamento do arteeducador, verificando as possibilidades de um diálogo entre este e o CBC/Arte; a colaboração dos agentes informadores; bem como a perspectiva do alunado quanto aos aspectos conceituais, procedimentais e atitudinais oferecidos nas aulas de Arte. Longe de se querer, a partir da análise de duas escolas, generalizar os resultados, pretende-se que, ao elucidar questões presentes nas escolas pesquisadas, possam elas servir de reflexão e signifiquem uma contribuição a outras escolas, a professores e pesquisadores.We try to capture, as it is happening, the practical implementation of "Common Basic Contents, CBC, of Art - the current Curricular Proposal of the State - in the 1st year of secondary school, in two state public schools, both located in the city of Belo Horizonte/MG. We chose to research only schools (two secondary schools, poles apart in performance levels one classified as a Reference School; the other, not. We aim to draw our conclusions with relation to the pedagogical Art proposal of the school being studied; the art educator's planning process providing the opportunity for exploring what possibilities exist for a dialogue between the school proposal and that of CBC/Art; the cooperation of all agents able to inform (shed light on the process; not least, the perspective of the student body, but equally the conceptual, procedural and attitudinal aspects presented in Art classes. Far from intending to generalize results, having only

  20. Utilização de fitoterápicos por idosos: resultados de um inquérito domiciliar em Belo Horizonte (MG, Brasil

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    Lucianno D. P. Marliére

    Full Text Available Os fitoterápicos constituem uma modalidade de terapia complementar ou alternativa diante das necessidades de saúde e seu uso tem sido crescente na população idosa de diversos países. Entretanto, apresentam interações medicamentosas e reações adversas importantes e sua utilização não deve ser indiscriminada. Este estudo objetivou caracterizar o perfil de utilização de fitoterápicos por aposentados e pensionistas do INSS, com 60 anos e mais, residentes em Belo Horizonte, MG. A partir do cadastro do INSS, selecionou-se uma amostra aleatória de 881 idosos para entrevista. Investigou-se a prevalência de uso de fitoterápicos e interações medicamentosas potenciais. Um total de 667 (80,3% dos selecionados foi entrevistado. Setenta e um participantes (10,6% utilizaram fitoterápicos nos últimos 15 dias, principalmente aqueles preparados a partir de extratos de ginkgo (41,8%, aesculus (12,3% e isoflavonas de soja (8,2%. Mais de 60% dos fitoterápicos foram adquiridos em farmácias de manipulação. Aproximadamente 45% dos usuários de fitoterápicos estavam expostos a pelo menos uma interação medicamentosa potencial entre eles e medicamentos sintéticos, tais como entre ginkgo e diuréticos tiazídicos (14 e antiagregante plaquetário/anticoagulantes (8. São necessárias estratégias de orientação para o uso racional de fitoterápicos entre idosos, mais vulneráveis aos prejuízos decorrentes da utilização inadequada desses.

  1. A qualidade da prescrição de antimicrobianos em ambulatórios públicos da Secretaria Municipal de Saúde de Belo Horizonte, MG The quality of antibiotics prescription in public health services of Belo Horizonte, MG

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    Patrícia de Magalhães Abrantes

    2008-04-01

    Full Text Available Este estudo investiga o uso de antimicrobianos e os padrões de prescrição e identifica os antimicrobianos mais freqüentemente prescritos nas unidades do serviço público de saúde de Belo Horizonte, MG. O estudo foi observacional, transversal de investigação da utilização da prescrição de antibacterianos em unidades públicas de saúde de Belo Horizonte, a partir da avaliação de amostra de prontuários e prescrições dispensadas no mês de março de 2002. A pediatria apresentou o maior índice de prescrição de antimicrobianos. A amoxicilina foi o antibacteriano mais prescrito. As hipóteses diagnósticas registradas com maior freqüência foram infecções das vias aéreas superiores, tonsilite e otite média. O percentual de inadequação entre hipótese diagnóstica registrada e antimicrobiano prescrito foi superior a 25%. Observou-se variabilidade nos tempos de tratamento instituídos e, em cerca de 10% das prescrições, o dado estava ausente. Verificou-se uma ausência sistem��tica de registro de informações gerais no prontuário. O estudo demonstrou a necessidade de intervenções que assegurarem o cumprimento dos protocolos como forma de garantir o uso adequado dos antimicrobianos.This study investigates the use of antibiotics and prescribing patterns and identifies the antibiotics most frequently prescribed in public health units of Belo Horizonte, MG. The methods used were observational, cross-sectional study aimed at analyzing the consistency between a sample of medical records and antibiotic prescriptions dispensed during March 2002 in eleven public health units in Belo Horizonte, Minas Gerais, Brazil. Pediatrics showed the highest proportion of antibiotic prescribing among four specialties; amoxicillin was the most frequently prescribed antibiotic, followed by benzathine penicillin G, sulfamethoxazole/trimethoprim, and erythromycin. Upper respiratory tract infections, tonsillitis, acute otitis media and urinary

  2. Laboratórios de análises e patologia clínica em Belo Horizonte, MG (Brasil: classificação quanto ao atendimento e exames realizados Clinical pathology laboratories in Belo Horizonte, Minas Gerais: classification according to service and tests carried out

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    Carlos M. F. Antunes

    1985-02-01

    Full Text Available Foi efetuada uma classificação, quanto ao atendimento e exames realizados, dos laboratórios de análises e patologia clínica operando na região metropolitana de Belo Horizonte, MG (Brasil, em 1978. Foram comparadas as 3 categorias de laboratórios (particulares, institucionais e hospitalares, segundo tipos de exames realizados, clientela atendida e pessoal técnico responsável pelos laboratórios. Com base nos resultados obtidos na análise, foi composto um "perfil" típico para cada categoria de laboratório estudado.An assessment of the Clinical Pathology Laboratories in Belo Horizonte, MG, was carried out in 1978, and the 3 categories identified (Private, Institutional and Hospital were compared in relation to the types of exams performed, to the clientele and to the Laboratories' personnel. Based on the results obtained, a typical "profile" for each category studied was drawn up.

  3. Retrospective study (1998-2001 on canine ehrlichiosis in Belo Horizonte, MG, Brazil Estudo retrospectivo (1998 a 2001 da erliquiose canina em Belo Horizonte

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    S.M. Moreira

    2003-04-01

    Full Text Available The present work describes a retrospective study of clinical cases of ehrlichiosis in dogs examined from March 1998 to September 2001. From the clinical records with laboratorial confirmation of Ehrlichia canis or E. platys infections, the following parameters were analyzed: demographic aspects (age, race, sex, period of the year and origin, clinical characteristics (body temperature, exposure to ticks and clinical signs, and hematological characteristics (blood cell counts and type of infected cell. A total of 194 clinical records were analyzed, from which 31 animals were infected with E. canis and 21 animals with E. platys. The number of cases of canine ehrlichiosis increased considerably from the year 2000 onwards, and 24.4% of the cases occurred in 13- to 24-month-old animals, in different urban and per-urban regions of the municipality of Belo Horizonte. The most frequent symptoms were fever, anorexia, apathy, abdominal pain, lymphadenopathy and dispnea. Regarding hematological alterations, 70.3% of the animals presented anemia, 50% presented thrombocytopenia and 30% leukopenia, and most E. canis morulae were seen in monocytes. The results point to the importance of canine ehrlichiosis, as 35.9% of the dogs with suspected hemoparasitic diseases were infected with Ehrlichia canis or E. platys.O presente trabalho descreve um estudo retrospectivo da casuística clínica de erliquiose em cães atendidos entre março de 1998 e setembro de 2001. Foram analisadas 194 fichas clínicas de animais com suspeita de hemoparasitoses, nas quais 31 cães foram diagnosticados com Ehrlichia canis e 21 com Ehrlichia platys, por meio de exame parasitológico direto de esfregaços sangüíneos. Foram considerados alguns aspectos demográficos (idade, raça, sexo, época do ano e região de origem, características clínicas (temperatura corporal, presença e/ou histórico de carrapatos e sinais clínicos e hematológicas (hemograma completo e célula parasitada

  4. Perfil epidemiológico da população idosa de Belo Horizonte, MG, Brasil Perfíl epidemológico de la población de ancianos de Belo Horizonte, MG, Brasil Epidemiological profile of the elderly population in Belo Horizonte, MG, Brazil

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    Meire Chucre Tannure

    2010-10-01

    Full Text Available Trata-se de uma pesquisa descritiva utilizando-se dados secundários da secretaria municipal de coordenação de política social de Belo Horizonte, cujo objetivo foi descrever o perfil epidemiológico da população idosa desta cidade. Os idosos de Belo Horizonte em 2000 representam 9,1% do total da população nela residente. Da população de idosos, 60,5% são mulheres e 39,4% são homens; 2,9% dos idosos apresentavam algum tipo de deficiência física, 16,4% alguma deficiência auditiva, 23,5% alguma dificuldade para enxergar, 24,1% alguma dificuldade para caminhar ou subir escadas e que 3,8% apresentavam problemas mentais. Concluiu-se que a parcela de pessoas idosas, fragilizada em Belo Horizonte era inferior à representada por aquela com boas condições de saúde. Envelhecimento não é sinônimo de incapacidade.Este es un estudio descriptivo de la utilización de los datos secundarios de la secretaría municipal para la coordinación de la política social en Belo Horizonte, cuyo propósito fue describir el perfil epidemiológico de la población de ancianos de esta ciudad. Las personas mayores en Belo Horizonte en 2000 representan el 9,1% del total de la población que reside en ella. Población de personas mayores, 60,5% son mujeres y el 39,4% son hombres, el 2,9% de las personas de edad tenían algún tipo de discapacidad física, 16,4% tiene la pérdida de la audición, 23,5% tienen dificultades para ver, 24,1% tienen dificultades para caminar o subir escaleras, y que el 3,8% tenía problemas mentales. Se concluyó que la proporción de personas de edad avanzada, debilitados en Belo Horizonte estuvo representada por menos de uno con una buena salud. El envejecimiento no es sinónimo de incapacidad.This is a descriptive study using the data side of the municipal secretariat for coordination of social policy in Belo Horizonte, whose purpose was to describe the epidemiological profile of elderly population of this city. The elderly in

  5. Vai lá, tira a roupa... e... pronto...": o acesso a consultas ginecológicas em Belo Horizonte, MG El acceso a consultas ginecológicas en Belo Horizonte, Minas Gerais, Brazil Access to gynecological consultations in Belo Horizonte, Minas Gerais, Brazil

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    Maria Eponina de Abreu e Torres

    2008-06-01

    Full Text Available Este trabalho tem como foco a consulta ginecológica. Investiga-se o acesso a estas consultas entre mulheres residentes em Belo Horizonte, com idades de 18 a 59 anos, bem como suas percepções sobre este acesso. O estudo foi desenvolvido em duas etapas: uma análise quantitativa por meio do método Grade of Membership (GoM, buscando delinear perfis de mulheres de 18 a 59 anos, que realizaram e não realizaram a consulta ginecológica nos 12 meses anteriores à pesquisa; e uma análise qualitativa, com base em 33 entrevistas semi-estruturadas, buscando captar a percepção que mulheres com características similares aos perfis extremos delineados na primeira etapa tinham sobre a consulta ginecológica. Os dados quantitativos são oriundos da pesquisa SRSR (Saúde Reprodutiva, Sexualidade e Raça/cor, realizada pelo Cedeplar em 2002. Já os dados qualitativos são provenientes da pesquisa "Aspectos quantitativos e qualitativos acerca do acesso à contracepção e ao diagnóstico e tratamento do câncer de colo uterino: uma proposta de análise para o município de Belo Horizonte, MG", ocorrida entre 2005 e 2006. Os resultados quantitativos sugerem que a realização de uma consulta ginecológica está muito relacionada às características socioeconômicas e demográficas das entrevistadas. Nota-se, também, que as mulheres com maior probabilidade de terem ido ao ginecologista, nos últimos 12 meses, são aquelas que tiveram um acompanhamento ginecológico regular e que costumavam procurar este profissional por meio de consultas particulares ou planos de saúde. Os resultados qualitativos reafirmam o desconforto das mulheres diante da consulta, sendo maior entre aquelas com menos escolaridade. Notou-se também que a primeira consulta ginecológica ocorreu em momentos muito diferentes para as mulheres de alta e de baixa escolaridade - para as primeiras está geralmente relacionada ao início da vida sexual e ao uso de contracepção, enquanto para

  6. Surgical treatment of intracranial aneurysms: six-year experience in Belo Horizonte, MG, Brazil Tratamento cirúrgico dos aneurismas intracranianos: experiência de seis anos em Belo Horizonte, MG, Brasil

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    Leodante Batista da Costa Jr

    2004-06-01

    Full Text Available Spontaneous subarachnoid hemorrhage accounts for 5 to 10 % of all strokes, with a worldwide incidence of 10.5 / 100000 person/year, varying in individual reports from 1.1 to 96 /100000 person/year. Angiographic and autopsy studies suggest that between 0.5% and 5% of the population have intracranial aneurysms. Approximately 30000 people suffer aneurysmal subarachnoid hemorrhage in the United States each year, and 60% die or are left permanently disabled. We report our experience in the surgical treatment of intracranial aneurysms in a six year period, in Belo Horizonte, Minas Gerais, Brazil. We reviewed the hospital files, surgical and out-patient notes of all patients operated on for the treatment of intracranial aneurysms from January 1997 to January 2003. Four hundred and seventy-seven patients were submitted to 525 craniotomies for treatment of 630 intracranial aneurysms. The majority of patients were female (72.1% in the fourth or fifth decade of life. Anterior circulation aneurysms were more common (94.4%. The most common location for the aneurysm was the middle cerebral artery bifurcation. The patients were followed by a period from 1 month to 5 years. The outcome was measured by the Glasgow Outcome Scale (GOS. At discharge, 62.1% of the patients were classified as GOS 5, 13.9% as GOS 4, 8.7% as GOS 3, 1.7% as GOS 2 and 14.8% as GOS 1.A hemorragia subaracnóidea espontânea é responsável por cerca de 5 a 10% de todos os acidentes vasculares cerebrais, com uma incidência mundial de 10,5 / 100000 pessoas/ano, variando em estudos individuais de 1,1 a 96 / 100000 pessoas / ano, de acordo com diferenças étnicas e geográficas. Estudos angiográficos e de necropsia sugerem que a presença de aneurismas intracranianos ocorre em 0,5-5% da população mundial. De acordo com estatísticas norte-americanas, ocorrem cerca de 30000 rupturas de aneurisma cerebral por ano naquele país, com conseqüências desastrosas para grande parte dos pacientes

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

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    Gomes, Tatiana Cristina Bomfim

    2013-07-01

    The increasing expansion of compounding pharmacy associated with several reports on variances in the quality of compounded drugs demonstrates the need for verification of quality, safety and efficacy of these products. In this work, physical and chemical analyzes were performed to evaluate the quality of some capsules manipulated enalapril and simvastatin, acquired in five pharmacies in Belo Horizonte /Brazil. Among the analyzes are pharmacopoeial tests for appearance, identification, determination of weight, content, related compounds and uniformity of dosage units, and was also performed neutron activation analysis for the determination of inorganic impurities in drugs sampled. The results showed that 60% of the samples were unsatisfactory for pharmacopoeial tests. The contents of the capsules sampled for individual testing unit dose uniformity between 0% and 136.2%. This test is important in evaluating the quality, which influences the safety and efficacy of drug treatment, since it allows you to check if the product contains the proper dosage and necessary for successful pharmacotherapy. On the other hand, underdosing can lead to reduced or absent desired therapeutic response, and overdoses can provide an undesirable effects and even toxic. The concentration of inorganic impurities was considered to be relatively small. However, no specific limits for some chemical elements in medicine hamper a better thread. In addition, further studies must be performed to assess chronic exposure to low concentrations of inorganic impurities, since drugs can be continuously used, and other sources of exposure must also be considered in order to evaluate the risk. The problems related to the quality and safety of compounded drugs are still reality in the country and reveal a serious public health problem, especially regarding the lack of uniformity between the unit doses of medications. It is suggested that the competent authorities to sanitary products, propose changes in

  8. Barreiras e aspectos facilitadores da adesão à terapia antirretroviral em Belo Horizonte-MG

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    Walquíria Jesusmara dos Santos

    2011-12-01

    Full Text Available O objetivo desse estudo foi conhecer dificuldades e aspectos que facilitam a adesão à terapia antirretroviral (TARV por pessoas com HIV/AIDS. Estudo qualitativo, desenvolvido junto a 26 sujeitos em uso de TARV, acompanhados por serviço de referência em Belo Horizonte, Minas Gerais. A análise das entrevistas, no que se refere às dificuldades encontradas, resultou em categorias relativas ao cotidiano de vida, às representações sobre o HIV e à complexidade do tratamento. Quanto aos aspectos facilitadores, as categorias encontradas foram a ausência de efeitos colaterais, lembrança dos sintomas da doença, aumento da sobrevida e influência da rede social. Os resultados mostram a importância de acompanhamento efetivo dos profissionais dos serviços para construírem, junto com os sujeitos, estratégias que melhorem a adesão à TARV.

  9. Prevalência de quedas em idosos cadastrados em um Centro de Saúde de Belo Horizonte-MG

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    Tânia Couto Machado Chianca

    2013-04-01

    Full Text Available A queda é utilizada como indicador de qualidade em serviços especializados no cuidado de idosos, sendo também considerado importante indicador de qualidade de vida de idosos em todos os ambientes. Realizou-se um estudo de corte transversal de 108 idosos cadastrados no Programa de Saúde da Família, em um Centro de Saúde de Belo Horizonte, Minas Gerais, com o objetivo de determinar a ocorrência de quedas nessa clientela, associando-as a algumas variáveis. Os dados foram coletados em prontuários e em visitas domiciliares por meio de entrevista estruturada, com instrumento específico. Observou-se que 64 (59,3% dos pacientes idosos já haviam sofrido quedas, havendo relação estatisticamente significativa (p=0,01 entre capacidade cognitiva dos idosos e ocorrência das quedas. Recomenda-se o cuidado de enfermagem na identificação precoce dos idosos com maior chance de sofrerem quedas, especialmente daqueles que, além do risco de queda, apresentam risco aumentado de sofrer lesões graves decorrentes da mesma.

  10. Prevalência de quedas em idosos cadastrados em um Centro de Saúde de Belo Horizonte-MG

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    Tânia Couto Machado Chianca

    Full Text Available A queda é utilizada como indicador de qualidade em serviços especializados no cuidado de idosos, sendo também considerado importante indicador de qualidade de vida de idosos em todos os ambientes. Realizou-se um estudo de corte transversal de 108 idosos cadastrados no Programa de Saúde da Família, em um Centro de Saúde de Belo Horizonte, Minas Gerais, com o objetivo de determinar a ocorrência de quedas nessa clientela, associando-as a algumas variáveis. Os dados foram coletados em prontuários e em visitas domiciliares por meio de entrevista estruturada, com instrumento específico. Observou-se que 64 (59,3% dos pacientes idosos já haviam sofrido quedas, havendo relação estatisticamente significativa (p=0,01 entre capacidade cognitiva dos idosos e ocorrência das quedas. Recomenda-se o cuidado de enfermagem na identificação precoce dos idosos com maior chance de sofrerem quedas, especialmente daqueles que, além do risco de queda, apresentam risco aumentado de sofrer lesões graves decorrentes da mesma.

  11. Classificação do arroz (Orysa sativa L. utilizado em restaurantes do município de Belo Horizonte-MG

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    Marlene Azevedo Magalhães Monteiro

    Full Text Available Resumo O objetivo deste trabalho foi classificar o arroz (Orysa sativa L. polido, utilizado em restaurantes do município de Belo Horizonte-MG. Participaram deste estudo oito restaurantes destinados à coletividade sadia das diferentes regiões administrativas do município de Belo Horizonte-MG. Foi realizada a determinação de umidade, matérias estranhas e impurezas, quebrados e quirera, mofados e ardidos, picados ou manchados, gessados e verdes, amarelos e rajados, classe e enquadramento do tipo, segundo a legislação vigente, além de análises de tempo de cozimento, volume, teste de cozimento, aumento de volume, rendimento e Fator de Rendimento. De acordo com os resultados obtidos, 37,5% (n=3 dos restaurantes utilizam arroz do Tipo 2. Porém, isto não alterou significativamente os testes de cozimento. Concluiu-se, neste estudo, não haver relação direta entre tipificação do arroz e a qualidade e o rendimento do produto final.

  12. Desenvolvimento do Schistosoma mansoni das linhagens de Belo Horizonte (MG, e de São José dos Campos (SP, em Mus musculus Development of Schistosoma mansoni strains from Belo Horizonte, MG and S. José dos Campos, SP (Brazil in Mus musculus

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    Luiz A. Magalhães

    1973-09-01

    Full Text Available Foram analisados os dados referentes ao desenvolvimento de cercárias de S. mansoni das linhagens de Belo Horizonte (MG e de São José dos Campos (SP, Brasil. Concluiu-se que após a penetração das cercárias pelo tegumento dos camundongos, não houve diferença significativa quanto ao número de vermes adultos que se desenvolveram, pertencentes às duas cepas estudadas.Experimental data of the developing of S. mansoni cercariae of two strains (Belo Horizonte, MG and S. José dos Campos, SP, penetrating through the tails of Mus musculus, were analysed. The data led to conclude that there is no numerical difference, in the two strains, as for development from cercariae to adult worm.

  13. Prevalência de quedas em idosos cadastrados em um Centro de Saúde de Belo Horizonte-MG Prevalencia de caídas en ancianos inscritos en un Centro de Salud de Belo Horizonte-MG Prevalence of falls in older adults enrolled in a Health Center of Belo Horizonte-MG

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    Tânia Couto Machado Chianca

    2013-04-01

    Full Text Available A queda é utilizada como indicador de qualidade em serviços especializados no cuidado de idosos, sendo também considerado importante indicador de qualidade de vida de idosos em todos os ambientes. Realizou-se um estudo de corte transversal de 108 idosos cadastrados no Programa de Saúde da Família, em um Centro de Saúde de Belo Horizonte, Minas Gerais, com o objetivo de determinar a ocorrência de quedas nessa clientela, associando-as a algumas variáveis. Os dados foram coletados em prontuários e em visitas domiciliares por meio de entrevista estruturada, com instrumento específico. Observou-se que 64 (59,3% dos pacientes idosos já haviam sofrido quedas, havendo relação estatisticamente significativa (p=0,01 entre capacidade cognitiva dos idosos e ocorrência das quedas. Recomenda-se o cuidado de enfermagem na identificação precoce dos idosos com maior chance de sofrerem quedas, especialmente daqueles que, além do risco de queda, apresentam risco aumentado de sofrer lesões graves decorrentes da mesma.La caída se utiliza como indicador de la calidad de los servicios especializados en el cuidado de los ancianos, y también se considera un indicador importante de la calidad de vida de las personas mayores en todos los ambientes. Se realizó un estudio transversal con 108 ancianos inscritos en el Programa Salud de la Familia de un Centro de Salud, en Belo Horizonte, Minas Gerais, con el fin de determinar la incidencia de caídas en esta clientela, vinculándolas a algunas variables. Los datos se obtuvieron de los registros médicos y visitas a domicilio mediante entrevista estructurada, con uso de un instrumento específico. Se observó que 64 (59,3% de los ancianos ya había sufrido caídas, y una relación estadísticamente significativa (p = 0,01 entre la capacidad cognitiva de los ancianos y las caídas. Se recomienda la identificación temprana de las personas mayores más propensas a sufrir caídas, especialmente aquellas que

  14. Avaliação nutricional de pacientes submetidos à hemodiálise em centros de Belo Horizonte Nutritional assessment of patients undergoing hemodialysis at dialysis centers in Belo Horizonte, MG, Brazil

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    Gláucia Thaise Coimbra de Oliveira

    2012-04-01

    Full Text Available OBJETIVO: O presente trabalho tem como objetivo caracterizar o estado nutricional de pacientes submetidos à hemodiálise em centros de diálise de Belo Horizonte por meio da Avaliação Global Subjetiva (AGS e associá-lo a variáveis socioeconômicas, sociodemográficas e clínicas. MÉTODOS: Foram avaliados 575 pacientes em 12 centros de diálise de Belo Horizonte. As variáveis socioeconômicas, sociodemográficas e clínicas foram coletadas em entrevistas por meio de questionários especificamente desenvolvidos para tal. O modelo de regressão logística foi utilizado para verificar o efeito ou influência de cada variável no estado nutricional. RESULTADOS: A prevalência de desnutrição foi significante (19,5%. A população avaliada apresentou, de modo geral, baixo nível socioeconômico, acesso limitado aos serviços de saúde particulares, alta taxa de comorbidades associadas e recebimento de grande número de recomendações nutricionais, não necessariamente adequadas. A idade > 60 anos, a renda igual ou inferior a um salário mínimo, a presença de depressão e o fato de ser aposentado foram fatores de risco para desnutrição, de acordo com a análise multivariada. CONCLUSÃO: A desnutrição é prevalente entre pacientes submetidos a hemodiálise. As diferenças nas características socioeconômicas, sociodemográficas, gerais e clínicas podem ser utilizadas para identificar pacientes que demandam mais atenção, em termos de risco para desnutrição - nesse caso, os idosos, os aposentados, aqueles com depressão e com baixo nível socioeconômico.OBJECTIVE: This study aims to assess the nutritional status of patients undergoing hemodialysis at dialysis centers in Belo Horizonte, MG, Brazil using the Subjective Global Assessment (SGA, and associate it with socioeconomic, demographic and clinical variables. METHODS: A total of 575 patients were evaluated at 12 dialysis centers in Belo Horizonte, MG, Brazil. Socioeconomic

  15. Significado atribuído por trabalhadores da saúde de Belo Horizonte-MG ao princípio da resolutividade nas ações cotidianas Significado atribuido por trabajadores de salud de Belo Horizonte-MG al principio de resolubilidad en las acciones cotidianas Meaning given by health workers of Belo Horizonte-MG to the principle of resolvability in everyday actions

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    Lilian Machado Torres

    2012-10-01

    Full Text Available Trata-se de estudo qualitativo, fundamentado na sociologia compreensiva, cujo objetivo foi o de compreender o significado atribuído pelos profissionais da rede hierarquizada de saúde de Belo Horizonte-MG, Brasil, ao princípio da resolutividade nas ações cotidianas de saúde. Trinta e dois trabalhadores foram os informantes desta pesquisa. Foi utilizada a entrevista semiestruturada e a técnica de análise de conteúdo. Profissionais descrevem o que é resolutividade e fatores que dificultam sua concretização. Percebem, também, que os pacientes nem sempre saem das Unidades com a resposta que desejam; e que o serviço é resolutivo no que corresponde ao seu nível de atenção, embora para a população e alguns gerentes seja o inverso. Conclui-se que se torna premente a reorganização de aspectos relacionados a este princípio doutrinário do SUS.Se trata de un estudio cualitativo, basado en la sociología comprensiva, cuyo objetivo fue comprender el significado atribuido por profesionales de la salud de la red de salud de Belo Horizonte-MG, Brasil, al principio de resolubilidad en las acciones cotidianas de salud. Treinta y dos trabajadores fueron los informantes de esta investigación. Se utilizó una técnica de entrevista semi-estructurada y el análisis de contenido. Los profesionales describen lo que es resolubilidad y los factores que dificultan su logro. Dan cuenta, también, que los pacientes no siempre salen de las Unidades con la respuesta que ellos quieren; y que el servicio es resolutivo en lo que corresponde a su nivel de atención, aunque para algunas personas y gerentes sea lo inverso. Concluye-se que se hace urgente reorganizar los aspectos de este principio doctrinal del SUS.This is a qualitative study, based on comprehensive sociology, which aimed to understand the meaning assigned by health professionals of Belo Horizonte-MG, Brazil, to the principle of resolvability in the everyday actions of health. Thirty

  16. Qualidade de cápsulas de sibutramina manipuladas em três farmácias de Belo Horizonte, MG, Brasil

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    Grazielle Heloiza SANGUINETE

    2015-01-01

    Full Text Available A sibutramina é um anorexígeno indicada como fármaco de primeira escolha para o tratamento da obesidade. Devido a inexistência de monografia farmacopeica para análise e controle de qualidade deste fármaco e que a sibutramina apresenta classificação biofarmacêutica I, os autores desse trabalho propuseram ensaios físico-químicos de qualidade e avaliação da influência dos excipientes na dissolução de cápsulas de sibutramina 10 mg manipuladas em três farmácias de Belo HorizonteMG. Foram aplicados os métodos gerais descritos na Farmacopeia Brasileira 5 ed e foi feita validação parcial de método espectrofotométrico UV. Os resultados indicam que das três amostras somente uma cumpriu com todas as especificações de qualidade.

  17. SONHO DE GARIMPEIRO É DIAMANTE NO PICUÁ: TERRITÓRIO E TRABALHO NOS GARIMPOS DE DIAMANTES EM COROMANDEL/MG

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    Ricardo Junior de Assis Fernandes Gonçalves

    2012-01-01

    Full Text Available O artigo possui como centralidade compreender a (reorganização do território e do trabalho em áreas de garimpos de diamantes no município de Coromandel/MG. A metodologia usada baseia-se no levantamento bibliográfico e pesquisa de campo. Em campo, priorizamos procedimentos como entrevistas, observação e diário de campo, além do uso de equipamentos como máquina fotográfica, filmadora e Sistema de Posicionamento Global (GPS, necessários para a obtenção de informação e dados. A partir da década de 90 do século XX questões como o fortalecimento das leis ambientais e trabalhistas, interdição de garimpos, ação de empresas transnacionais, organização dos garimpeiros em cooperativas e mecanização da atividade tem gerado rápidas mudanças, com rebatimentos nas relações de produção e trabalho nas áreas de garimpos de diamantes no município de Coromandel/MG.

  18. Impacto da cárie dentária na qualidade de vida de adultos residentes no entorno de Belo Horizonte, MG, Brasil

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    Simone de Melo Costa

    2013-07-01

    Full Text Available O artigo discute o impacto da cárie dentária na qualidade de vida das pessoas. O objetivo foi avaliar a qualidade de vida de adultos moradores no entorno de Belo Horizonte, Minas Gerais, Brasil, conforme a prevalência e a severidade de cárie dentária. Trata-se de estudo transversal, de base domiciliar realizado a partir de amostragem por conglomerados. Os indicadores utilizados na coleta de dados foram o índice de cárie CPOD e a Escala WHOQOL-bref. A prevalência de cárie foi definida a partir da presença de pelo menos um dente cariado (C > 1 e a maior gravidade pelo CPOD > 25. A população examinada foi de 1138 adultos, sendo que 461 tinham pelo menos um dente cariado. Houve melhores índices de qualidade de vida para os grupos de pessoas sem cárie e com menor gravidade de cárie. À medida que o número de dentes cariados e o CPOD aumentam a qualidade de vida diminuí (p < 0,001. A correlação negativa entre cárie e qualidade de vida foi verificada nos domínios psicológico, relações sociais e meio ambiente. Concluiu-se que a cárie dentária resulta em impacto negativo na qualidade de vida de adultos. Os indicadores subjetivos contribuíram para qualificar as informações clínicas de saúde bucal.

  19. Valores organizacionais e do trabalho: um estudo com professores de uma escola filantrópica e confessional de Belo Horizonte (MG [doi: 10.5329/RECADM.2014005

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    Kely Cesar Martins Paiva

    2014-05-01

    Full Text Available O objetivo deste estudo foi analisar como se encontram configurados os valores organizacionais e do trabalho de professores, na percepção deles próprios. O referencial teórico aprofundou nas temáticas, destacando-se as contribuições de Oliveira e Tamayo (2004 e Porto e Tamayo (2003, cujos modelos conceituais foram adotados para fins da pesquisa realizada. Neste artigo, resultante de uma pesquisa descritiva que contou com uma triangulação metodológica, foi apresentada a parte quantitativa do estudo de caso, que contou com 77 professores de uma instituição de ensino filantrópica e confessional, localizada em Belo Horizonte (MG. Os dados do questionário foram trabalhados com estatística uni e bivariada. Quanto aos valores do trabalho, salientem-se os resultados positivos em relação a “realização”, “relações sociais” e “estabilidade”; já o valor “prestígio” foi avaliado mais timidamente pelos pesquisados, o que pode estar refletindo uma precarização do trabalho docente. Quanto aos valores organizacionais, apuraram-se escores positivos no que tange à “autonomia”, “realização”, “conformidade” e “preocupação com a coletividade”. Os testes de comparação apresentaram 6 resultados significativos; já os de correlação somaram 36 resultados significativos (4 entre construtos e dados sociodemográficos; 32 dos construtos entre si. Foram apresentadas as contribuições e limitações do estudo e uma agenda para pesquisas futuras.   Palavras-Chave Valores organizacionais; Valores do trabalho; Professor; Instituição privada.     ORGANIZATIONAL VALUES AND WORK VALUES: A STUDY WITH TEACHERS OF A PHILANTHROPIC AND CONFESSIONAL SCHOLL AT BELO HORIZONTE (MG Abstract The aim of this study was to analyze how organizational values and work values of teachers are configured, in the perception of themselves. The theoretical deepened the themes, highlighting the contributions of Oliveira and Tamayo

  20. Mapeamento preliminar de solos com horizonte B textural e B nítico na região de Lavras, MG Preliminary mapping of alfisols and ultisols in the region of Lavras, MG

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    Marilusa Pinto Coelho Lacerda

    2009-06-01

    Full Text Available Estudos de caracterização de solos e estabelecimento de relações entre pedologia, geologia e geomorfologia permitem a elaboração de modelos preditivos da distribuição dos solos na paisagem. Objetivou-se, com o presente trabalho, estudar estas relações, com a finalidade de representar a distribuição de solos com horizonte B textural e B nítico na paisagem da região de Lavras, MG, por intermédio da geração de mapa preliminar de solos, utilizando técnicas de geoprocessamento. Os estudos foram realizados em solos com horizonte B textural e B nítico, uma vez que esses solos apresentam características relacionadas à variação da composição geoquímica das rochas ígneas de origem, refletindo-se em vários atributos dos solos, enfatizando a cor e o teor de Fe2O3. Foram realizadas campanhas de campo com avaliações morfológicas, físicas e químicas de perfis de solos representativos, desenvolvidos a partir de unidades geológicas de composições geoquímicas distintas, estabelecendo as relações pedogeológicas. Verificou-se, também, a distribuição dos solos na paisagem, com o estabelecimento das relações pedogeomorfológicas. Foi constatado que tais solos são desenvolvidos na região em relevo caracterizado por classes de declividade de 12 a 45%, originando diferentes classes de solos com horizonte B textural e B nítico, diretamente relacionados à variação do material de origem. Os critérios estabelecidos nas relações entre pedologia, geologia e geomorfologia permitiram avaliar a distribuição dos solos na paisagem estudada e a geração do mapa preliminar de solos, com individualização de solos com horizonte B textural e B nítico.Studies of characterization of soils and establishment of relationships among pedology, geology and geomorphology allow the elaboration of models of soil distribution in landscaping. This study aimed at studies of this nature, with the purpose of representing the distribution of

  1. Eventos Gastronômicos e Estratégias de Marketing: O Festival Comida Di Buteco em Belo Horizonte, MG.Eventos Gastronômicos e Estratégias de Marketing: O Festival Comida Di Buteco, em Belo Horizonte, MG / Gastronomic Events and Marketing Strategies: The Fes

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    Graziela Da Silva Suzuki

    2015-07-01

    Full Text Available Os eventos são considerados como estratégias de comunicação no composto de marketing. Sendo assim, o presente trabalho tem por objetivo identificar o Retorno Sobre Investimento (ROI da participação no festival gastronômico “Comida di Buteco”. Para tanto, utilizam-se teorias do marketing de relacionamento, da comunicação, da retenção e uma adaptação das categorias propostas pela metodologia ROI, de Phillips. Foram realizadas 12 entrevistas com os gestores e proprietários de bares participantes do festival. A técnica de análise dos dados foi a do discurso do sujeito coletivo (DSC. Palavras-chave: Gastronomia. Evento Gastronômico. Marketing de relacionamento. Festival Comida di Buteco. Belo Horizonte, MG. Gastronomic Events and Marketing Strategies: The Festival ‘Comida Di Buteco’ - Events are considered as communication strategies in the marketing mix. Thus, this study aims to identify the Return on Investment (ROI participation in the gastronomic festival ‘Comida de Buteco [Food di Buteco]. The methodology uses theories of relationship marketing, communication, retention and the adaptation of the categories proposed by the Phillips ROI methodology. 12 interviews with managers and owners of bars were made. Data analysis technique was that of the CSD. Keywords: Gastronomy. Gastronomic Event. Relationship marketing. Food Festival. Belo Horizonte, MG, Brazil.

  2. Lesões buco-dentais em mulheres em situação de violência: um estudo piloto de casos periciados no IML de Belo Horizonte, MG Mouth-dental injuries in women violence victims: a pilot study of registered cases in the Legal Medical Institute of Belo Horizonte, MG

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    Edson José Carpintero Rezende

    2007-06-01

    Full Text Available A violência tem mostrado tendência ascendente, nos últimos anos, no Brasil. Nesse cenário, a violência sofrida pela mulher vem-se tornando mais visível à sociedade a partir das denúncias de agressões sofridas. Este estudo se propõe a descrever dados referentes às lesões corporais na região peribucal em mulheres que sofreram agressão. Foram analisados os registros e laudos encaminhados ao setor de Odontologia do IML de Belo Horizonte, referentes ao período de janeiro de 2001 a junho de 2002. Neste período, foram atendidas 108 mulheres. A faixa etária predominante foi a de 20 a 39 anos (70,4%. A maioria dessas mulheres declarou: ser solteira (63,0% e ser natural do interior do Estado (48,1%. Quanto à ocupação encontrou-se: 24% que realizam trabalhos domésticos, 21% que são donas-de-casa e 14% que trabalham no comércio. A proporção de mulheres procedentes das Delegacias Seccionais foi maior do que aquelas encaminhadas pelas Delegacias de Mulheres. A lesão de tecido mole mais freqüente foi a laceração; a de tecidos duros e da polpa foram as fraturas de esmalte e dentina sem complicações; a de tecidos periodontais foi a concussão; e foram observadas duas lesões em tecidos ósseos. O estudo permitiu constatar a necessidade de uma coleta de dados mais cuidadosa nos exames periciais, de modo a disponibilizar informação mais detalhada da violência contra as mulheres; além disso, revelou que as lesões buco-dentais são freqüentes e representam uma grande demanda para os serviços odontológicos de saúde pública que prestam esse atendimento.Violence has been a growing problem in the past years in Brazil. Violence against women has become clearer to society after victims started filing accusations of aggression. This study aims to describe data on lesions in women, victims of aggression in the region of the mouth, sent to the Dental Sector of the Legal Medical Institute in Belo Horizonte, Minas Gerais, Brazil. The

  3. Avaliação da prevenção da transmissão vertical do HIV em Belo Horizonte, MG, Brasil Evaluación de la prevención de la transmisión vertical del VIH en Belo Horizone, MG, Brasil Prevention evaluation of HIV vertical transmission in Belo Horizonte, MG, Brazil

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    Francisco Carlos Felix Lana

    2010-08-01

    Full Text Available A pesquisa teve como objetivo analisar o pré-natal ofertado na rede básica de saúde do Distrito Leste do município de Belo Horizonte e as ações direcionadas à prevenção da transmissão vertical do HIV. Foi discutida a permanência de taxas significativas de transmissão do HIV na vigência de tecnologias adequadas para a sua prevenção. Por meio de uma análise descritiva e univariada, que abordou os bancos de dados Sisprenatal e Sinan, identificou-se entraves que se relacionam diretamente a problemas observados na captação precoce de gestantes e na instituição da terapêutica em tempo adequado. O envolvimento dos gestores e a capacitação dos profissionais envolvidos é essencial para o correto direcionamento de ações que possibilitem a prevenção efetiva da transmissão vertical do HIV.Este trabajo de investigación tuve como objetivo analizar la atención prenatal de la red básica del Distrito Este del municipio de Belo Horizonte y las acciones que buscan prevenir la transmisión del VIH de madre a hijo. Se discutió el porqué de las altas tasas de transmisión vertical de dicho virus cuando hay tecnologías adecuadas para su prevención. Se realizó un análisis descriptivo y univariado de información de los bancos de datos Sisprenatal y Sinan. Se identificaron obstáculos para los problemas observados en la captación temprana de embarazadas y en la institución de la terapéutica en tiempo adecuado. El compromiso de los gestores y la capacitación de los profesionales son esenciales para orientar acciones de prevención efectiva de la transmisión vertical del VIH.The study had as objective to analyze the prenatal care services offered by the East District's primary healthcare network of the city of Belo Horizonte as well as actions for the prevention of vertical transmission of HIV. It discussed the still significant rates of transmission of HIV in the presence of appropriate technologies for its prevention. Barriers

  4. Tendências e perspectivas da administração em enfermagem: Um estudo na Santa Casa de Belo Horizonte-MG Tendencias y perspectivas de la administración en enfermería un estudio en la Santa Casa de Belo Horizonte-MG Trends and perspectives of nursing administration: a study in the "Santa Casa" Hospital of Belo Horizonte-MG, Brazil

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    Carla Aparecida Spagnol

    2002-01-01

    Full Text Available A Santa Casa de Belo Horizonte implantou um novo Sistema de Gestão que a caracterizou como uma organização flexível. Partindo desse contexto, delineamos como objetivos deste estudo: analisar a forma da administração em enfermagem, considerando a implantação do SIGESC; descrever como a equipe de enfermagem percebe a comunicação, o processo decisório e as relações interpessoais; identificar possíveis tendências e perspectivas presentes na prática administrativa desenvolvida. Evidenciamos um momento de transição da administração em enfermagem que apresenta traços da gerência clássica e da gerência contemporânea. Entretanto, sinalizamos tendências e perspectivas que poderão contribuir para a reorganização do processo de trabalho da enfermagem na área hospitalar.La Santa Casa de Belo Horizonte, implantó un nuevo Sistema de Gestión, caracterizándose como una organización flexible. Partiendo de este contexto, delimitamos como objetivos: analizar la forma de administración en enfermería, considerando la implementación del SIGESC; describir como el equipo de enfermería percibe la comunicación, el proceso de toma de decisiones y las relaciones interpersonales; identificar posibles tendencias y perspectivas presentes en la práctica administrativa desarrollada. Evidenciamos un momento de transición de la administración en enfermería que presenta trazos de la gerencia clásica y de la gerencia contemporánea. Por ahora, señalamos tendencias y perspectivas que podrán contribuir para la reorganización del proceso de trabajo de enfermería en el área hospitalaria.The "Santa Casa" Hospital of Belo Horizonte has implemented a new management system that has characterized it as a flexible organization. Based on this context, the authors of this research defined the following objectives: to analyze nursing administration by considering the implementation of the Management System (SIGESC, to describe how the nursing team

  5. Manifestações patológicas em edifícios do Programa de Arrendamento Residencial (PAR) em Belo Horizonte, MG, executados em alvenaria estrutural

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    Alvarenga, Maria Cláudia Sousa

    2010-01-01

    O presente trabalho consiste na avaliação de desempenho construtivo de empreendimentos contidos no Programa de Arrendamento Residencial (PAR) da Caixa Econômica Federal, na Cidade de Belo Horizonte, executados com a tecnologia de alvenaria estrutural. A proposta desta pesquisa foi a análise das manifestações patológicas existentes, com ênfase no aspecto estrutural dos empreendimentos, porém, contemplando também outros tipos de danos nas edificações. Foram escolhidos cinco empreendimentos, lev...

  6. [Epidemiology of overweight and obesity and its determinants in Belo Horizonte (MG), Brazil: a cross-sectional population-based study].

    Science.gov (United States)

    Velásquez-Meléndez, Gustavo; Pimenta, Adriano M; Kac, Gilberto

    2004-11-01

    To determine the prevalence of overweight and obesity and to study potential risk factors for these conditions in persons over 18 years of age in the metropolitan area of Belo Horizonte, Brazil. Data were obtained from a population-based study conducted in 1996 and 1997 by the Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatística, IBGE) with a random sample of 1 105 individuals. Height and weight were measured by trained personnel. Overweight (body mass index [BMI] > or = 25.0 kg/m2) and obesity (BMI > or = 30.0 kg/m2) were the dependent variables. Bivariate analysis and multivariate logistic regression were used to identify potential risk factors for overweight and obesity. The prevalence of overweight and obesity was 31.1% (95% confidence interval 195% CI]: 27.3 to 35.2) and 5.7% (95% CI: 4.0 to 8.1), respectively, in men, and 25.9% (95% CI: 22.4 to 29.8) and 14.7% (95% CI: 11.9 to 17.9), respectively, in women. Multivariate analysis revealed that age and marital status were independent risk factors for overweight, whereas age, sex, and education were independent risk factors for obesity. Being female and well-educated showed a protective effect against overweight (odds ratio [OR] = 0.52; 95% CI: 0.33 to 0.83), but not against obesity (OR = 3.01; IC 95%: 1.14 to 7.94). Women with low education had a significantly greater risk (OR = 5.95; 95%CI: 2.51 to 14.12) of developing obesity than men having a high educational level. These results suggest that overweight and obesity may be serious public health problems in the metropolitan area of Belo Horizonte, Brazil. It is important to carry out further studies in order to explore the potential relationship between overweight and obesity on the one hand, and behavioral variables, such as smoking and alcohol consumption, on the other.

  7. A contabilidade ambiental em empresas certificadas pelas normas ISO 14001 na região metropolitana de Belo Horizonte-MG

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    Walmer Faroni

    2010-12-01

    Full Text Available As empresas que adotaram um Sistema de Gestão Ambiental necessitam cumprir as normas ISO 14001 e ter o controle dos recursos para tomar decisões. A contabilidade exerce importante papel no fornecimento de informações aos gestores, possibilitando-lhes maior eficiência na gestão do meio ambiente. Assim, este estudo teve como propósito analisar a utilização do conceito e instrumentos da Contabilidade Ambiental nas empresas certificadas pela ISO 14001. Os dados foram obtidos por meio da aplicação de questionários semiestruturados aos contadores e gestores ambientais de 10 empresas da região metropolitana de Belo Horizonte. Constatou-se que as empresas estudadas não utilizam os instrumentos de Contabilidade Ambiental para tomar as decisões relacionadas ao meio ambiente e, sim, a contabilidade tradicional. Quanto à ocorrência de mudanças na contabilidade após a obtenção da certificação ambiental, verificou-se que não houve mudança nas demonstrações contábeis tradicionais. Algumas empresas apenas incluíram contas específicas em seus planos de contas, destinadas à contabilização de eventos ambientais. Destaca-se, ainda, a falta de conhecimento, por parte de alguns contadores e gestores entrevistados, dos benefícios que a utilização da Contabilidade Ambiental pode trazer para os negócios da empresa.

  8. Carcinoma gástrico: análise sistemática de 289 gastrectomias consecutivas em Belo Horizonte (MG

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    Lemes Laura A.O.

    2003-01-01

    Full Text Available Introdução e objetivos: O carcinoma gástrico (CG, altamente prevalente em nosso meio, é a primeira causa de morte por câncer no país. Neste trabalho relatamos os dados de nossa casuística de um período de dez anos. Material e método: Examinaram-se 289 peças de gastrectomia para CG, seguindo-se protocolo padronizado. Resultados: A maior parte dos CG (n = 170, 59% tinha localização distal, 230 casos (79% eram CG avançados (predominantemente Borrmanm III e 36 casos (12,4%, precoces (predominantemente tipo II; 40% dos casos eram expansivos e 42%, infiltrativos; 178 casos (62% eram do tipo intestinal (CGI, 61 (21%, do tipo difuso (CGD e 50 (17%, mistos ou não-classificáveis. Dos 178 casos de CGI, 116 pacientes eram homens e 61, mulheres (1,9:1, com média de idade de 67 ± 12 anos; nos 61 casos de CGD, 36 pacientes eram homens e 25, mulheres (1,4:1, sendo significativamente mais novos que no CGI (59 ± 14 anos (p = 0,001. O CGI era predominantemente do tipo Borrmann I ou II, enquanto que o CGD era mais comumente do tipo III ou IV de Borrmann (p = 0,004. Os CGD estavam em estádios mais avançados do que os CGI (p = 0,02 e a invasão de nervos foi mais frequentemente (p < 10-7. Gastrite crônica atrófica e metaplasia intestinal foram freqüentes, tanto no CGI (81% e 67% como no CGD (77% e 59%. Conclusões: Os dados são semelhantes aos da literatura para populações de médio e alto riscos para CG, predominando tumores distais de tipo intestinal. A maioria dos casos é de CG avançado sem possibilidade de cura no momento do diagnóstico.

  9. Diagnóstico das bibliotecas escolares da rede estadual de ensino de Belo HorizonteMG: a situação dos acervos School libraries in the state educational system of Minas Gerais - Brazil: survey of their collections

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    Paulo da Terra Caldeira

    2004-05-01

    Full Text Available This paper presents the results of a research about the collections of 63 school libraries in thecity of Belo Horizonte-State of Minas Gerais, Brazil. The data, obtained throughquestionnaire, show that the average number of books per student is 3,56. Few libraries haveaccess to internet. In most of the libraries when necessary the students are guided to use theresources of local libraries, especially the State Central Library. Many of the respondentsbelieve that their library collection is regular or good. Apresenta resultados de pesquisa sobre o acervo de bibliotecas escolares da rede estadual de ensino de Belo HorizonteMG, na perspectiva da quantidade de materiais disponíveis para uso dos alunos. Os dados, obtidos por questionário respondido pelos responsáveis por 63 bibliotecas, mostram que a média de itens por aluno é de 3,56. Poucas bibliotecas possuem computadores ligados à Internet, e em apenas uma escola os computadores são utilizados pelos alunos. Na maioria das bibliotecas, os alunos costumam ser encaminhado, quando necessário, para outras bibliotecas: de escolas vizinhas, de universidades e, principalmente,para a biblioteca pública. A maioria dos responsáveis pelas bibliotecas considera seus acervos regulares ou bons, e boa a utilização pelos usuários.

  10. Horizontal Accelerator

    Data.gov (United States)

    Federal Laboratory Consortium — The Horizontal Accelerator (HA) Facility is a versatile research tool available for use on projects requiring simulation of the crash environment. The HA Facility is...

  11. No Dizer das Vozes Locais Revisitando a Experiência de Montes Claros/MG com Incentivos Fiscais Federais nos Anos de 1960-1980

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    Felipe Fróes Couto

    2016-01-01

    Full Text Available This article seeks to analyze the experience of Montes Claros/MG with the tax incentive policy of Sudene from the 1950, from secondary data and reports of the relevant social actors. It was opted for the use of a descriptive research for the purposes, field research for the methods and the case study as research technique. Were interviewed 40 representatives of relevant local institutions. It was concluded that the spatial redistribution of economic activity from the macropolitics of tax incentives disregarded local levels of interaction between the different agents and created unexpected effects. In the analysis of this case, an unexpected element of federal tax incentives policy was the lack of preparation of the local business community to properly manage federal resources directed to the municipality. This resulted in a series of experiences of failure in the region that gave rise to the “cemetery of industries”.

  12. Ectoparasitos de roedores da região urbana de Belo Horizonte, MG: III. Indices pulicidianos, anoplurianos e acarianos em Rattus Norvegicus norvegicus Ectoparasites in rodents of the urban region of Belo Horizonte, MG: III. Fleas, anoplura and acari indices in Rattus norvegicus norvegicus

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    Pedro Marcos Linardi

    1985-09-01

    Full Text Available Indices pulicidianos, anoplurianos e acarianos, globais e específicos foram determinados para os ectoparasitos de Rattus norvegicus norvegicus capturados em zona urbana de Belo Horizonte, Minas Gerais, Brasil, no período de junho de 1980 a setembro de 1982. Tendo-se em vista os valores limites ou críticos atribuídos aos índices pulicidianos, sobretudo ao índice "cheopis" e propostos por diversos autores como medida complementar de vigilância epidemiológica para peste bubônica, a comunidade de Belo Horizonte poderia ter estado exposta a esta infecção, uma vez que os índices globais anuais de 0,3 a 2,4 e a pulga prevalente foi Xenopsylla cheopis (99,2%, com os maiores índices coincidindo com o final da estação seca-fria. Em duas ocasiões, a comunidade poderia ter permanecido altamente exposta à infecção, já que os índices-limites tolerados foram suplantados: 8,8 (outubro 1980 e 6,2 (setembro 1982. Sugere-se que medidas profiláticas como anti-ratização e desinsetização sejam eficazmente aplicadas ao final da estação seca-fria, ou anteriormente à chegada das chuvas, sendo sucedidas pela desratização. Informações sobre índices anoplurianos e acarianos são importantes para que se possa, no exclusivas de roedoresThe total and specific indices of fleas, lice and mites were determined for ectoparasites on Rattus norvegicus norvegicus capture in urban areas of Belo Horizonte, Minas state, Brazil, from June 1980 to September 1982. In view of the limiting or critical values attributed to flea indices above all the [quot ]cheopis[quot ] index, proposed by several authors as a complementary measure for bubonic plague surveillance, the community of Belo Horizonte would have been exposed to this infection. The annual total indices ranged from 0.3 to 2.4 and the prevalent flea was Xenopsylla cheopis (99.2%, with the highest indices coinciding with the late dry-cool season. On two occasions, in this period, the community would

  13. Avaliação preliminar da qualidade da fluoxetina comercializada por farmácias de manipulação em Belo Horizonte/MG | Preliminary assessment of the quality of the fluoxetine commercialized by pharmacies of manipulation from the city of Belo Horizonte/Brazil

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    Alexandre Soares Leal

    2017-02-01

    Full Text Available Neste trabalho, foram avaliadas 14 amostras de fluoxetina comercializadas por 13 estabelecimentos diferentes da rede de farmácias magistrais em Belo Horizonte/MG. A amostragem obtida representa 47,0% do total de 30 unidades de preparação distintas na cidade e corresponde a cerca de 180 pontos de venda. Foram realizadas análises de determinação de peso, identificação, teor de princípio ativo e uniformidade de doses unitárias. As análises foram realizadas pela Fundação Estadual Ezequiel Dias (Funed/MG com base nas metodologias descritas nas farmacopeias de referência. Foram observadas irregularidades em algumas amostras como na rotulagem e ensaio de teor. Foi também investigada a presença e concentração de metais e outras impurezas inorgânicas através da técnica de análise por ativação neutrônica (AAN. Os resultados mostraram também a presença de elementos como As, Br, Co, Cr e Hf que, mesmo em baixas concentrações, podem ser prejudiciais à saúde humana se consumidos de forma constante durante longo prazo. ==================================== In this study, fourteen samples of fluoxetine being commercialized by thirteen different establishments of the network of magistral pharmacies in the City of Belo Horizonte/MG were assessed. The sampling corresponds to 47,0% of the total 30 different units of preparation of the city, which corresponds to about 180 points of sale. Analyses for determining weight, identification, active ingredient content and uniformity of dosage units were performed by the State Foundation Ezequiel Dias (FUNED /MG based on methodologies described by reference pharmacopoeias. Irregularities, on the labeling and the content testing, were observed in some samples. It was also investigated, through the technique of neutron activation analysis (NAA, the presence and concentrations of metals and other inorganic impurities. The results showed the presence of elements such as As, Br, Cr Co, Cr, Hf and

  14. As formas "trocável" e "fixa" dos cations k+, ca++ e mg++ nos solos do estado de São Paulo

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    R. A. Catani

    1949-01-01

    Full Text Available O conhecimento das caraterísticas químicas dos solos tropicais e subtropicais assume, dia a dia, maior importância, à medida que se desenvolve a nossa agricultura. No presente trabalho foram examinadas amostras representativas de quatro dos principais tipos de solo do Estado de São Paulo, a saber : Massapé-salmourão, Glacial, Terra-roxa legítima e Arenito Bauru. Procurou-se determinar se os elementos potássio, cálcio e magnésio se acham na forma "trocável" e "não trocável", e em que proporções. Primeiramente são apresentadas as propriedades físico-químicas e mecânicas das amostras dos solos, a fim de melhor caraterizá-las. A seguir, são dados os resultados obtidos sobre os teores "trocáveis" de potássio, cálcio e magnésio, extraídos do solo por dois processos químicos diferentes, isto é, com solução normal de acetato de amônio e com a solução 0,05 X de ácido nítrico. Os resultados obtidos por êsses dois processos foram bastante concordantes. As mesmas amostras usadas para as dosagens da forma "trocável" desses elementos, por meio da solução 0,05 N de HN0(3, foram depois tratadas com solução de HCl 5 N, a fim de se verificar se ainda encerravam os cations K+, Ca++ e Mg++, na forma "não trocável". Observou-se que o teor de cálcio extraído por essa solução (HCl 5 N é muito baixo, ao passo que os teores de potássio e magnésio foram elevados. Isto indica que o cálcio se encontra quase que sòmente na forma "trocável" (na parte mais externa dos colóides, ao passo que o potássio e o magnésio, além de se acharem na forma "trocável", também se encontram na forma "não trocável" (na parte mais interna dos colóides.A knowledge of the chemical characteristics of tropical and subtropical soils, is essential for the development of our agriculture. In the present study examinations were made on samples of the four principal soil types of the State of São Paulo. These types are ; Massap

  15. Distribuição temporal e espacial da leishmaniose visceral em humanos e cães em Belo Horizonte-MG, 1993 a 2007 Temporal and spatial distribution of leishmaniasis in humans and dogs from Belo Horizonte-MG, 1993-2007

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    E.G.P. Lopes

    2010-10-01

    Full Text Available O objetivo desta pesquisa foi descrever as análises da série cronológica e determinar a tendência da leishmaniose visceral em humanos e cães para o município de Belo Horizonte, de 1993 a 2007. De 1994, quando surgiram os primeiros casos da doença, até 2007, foram registrados 994 casos humanos autóctones com 116 óbitos. De 1993 a 2007, foram analisadas 1.492.401 amostras de sangue canino com percentual de positividade de 5,9%, utilizando-se os testes de enzyme-linked immunosorbent assay (ELISA como triagem e de imunofluorescência indireta (IFI como confirmatório. As análises indicaram que a leishmaniose visceral apresentou tendência crescente dos coeficientes de incidência em humanos e de prevalência em cães, e observaram-se arquétipos distintos dessa tendência, retratando o momento histórico de transição endêmica. A leishmaniose visceral em cães não apresentou características de distribuição sazonal, e não foi possível concluir a existência ou não de ciclicidade do fenômeno. A leishmaniose visceral em humanos e cães tem ampla distribuição espacial nas nove regionais administrativas com risco diferenciado de acometimento da doença, apesar da presença das fontes de infecção e dos susceptíveis em todo o município.The chronological series analysis and the tendencies of both human and canine visceral leishmaniasis were determined in Belo Horizonte city, from 1993 to 2007. From 1994, when the first cases of the disease were reported, until 2007, 994 human cases were recorded, which led to 116 deaths. From 1993 to 2007, 1,492,401 samples of canine blood were analyzed by the enzyme-linked immunosorbent assay (ELISA as screening test and by the Indirect Immunofluorescence (IFI as confirmatory test. The rate of positive results was 5.9%. The analyses indicated that the visceral leishmaniasis presents a tendency of increasing the coefficient of incidence in humans and prevalence in dogs and different archetypes of

  16. Quantificação dos resíduos potencialmente infectantes presentes nos resíduos sólidos urbanos da regional sul de Belo Horizonte, Minas Gerais, Brasil Gravimetric characterization of potentially infectious material in urban solid waste in southern Belo Horizonte, Minas Gerais State, Brazil

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    Noil Amorim de Menezes Cussiol

    2006-06-01

    Full Text Available O objetivo da pesquisa foi o de conhecer a parcela de resíduos potencialmente infectantes ­ aqueles contendo fezes, urina, sangue e fluidos corpóreos ­ de origem domiciliar, presentes nos resíduos sólidos urbanos. Em agosto e setembro de 2002, os resíduos da região Sul de Belo Horizonte foram coletados e levados ao Centro de Tratamento e Disposição Final de Resíduos Sólidos da BR 040, para segregação e quantificação. Os "perfurocortantes" contribuíram com 0,02±0,02% dos resíduos coletados e a presença dos "não-perfurocortantes" foi de 5,47±1,11%. Na categoria "perfurocortante", os aparelhos de barbear predominaram (0,01±0,01%, enquanto que na categoria "não-perfurocortante" as maiores frações foram de papel higiênico (3,00±0,90%, fraldas descartáveis (2,21±1,08% e absorventes higiênicos (0,22±0,12%. Os resíduos infectantes de origem domiciliar corresponderam ao dobro da fração total (infectante e comum dos resíduos de unidades de serviços de saúde. A discussão foi feita sob a égide dos perigos à saúde e segurança dos trabalhadores da coleta formal (garis e informal (catadores de rua e lixões.This study investigated potentially infectious waste (feces, urine, blood, body fluids in the composition of total municipal solid waste. From August to September 2002, solid waste samples from southern Belo Horizonte, capital of the State of Minas Gerais, were collected and sent to the solid waste treatment and disposal site at BR-040 for segregation and quantification. Sharps (objects that can cause cuts or puncture wounds made up 0.02±0.02% of the collected waste, while non-sharps accounted for 5.47±1.11%. In the sharps category, the majority were razor blades (0.01±0.01%, while among non-sharps the most frequent components were toilet paper (3.00±0.90%, diapers (2.21±1.08%, and sanitary napkins (0.22±0.12%. Household infectious waste was twice the total amount of waste (infectious + common from healthcare

  17. Incidência de ocratoxina A em café torrado e moído e em café solúvel consumido na cidade de Belo Horizonte, MG

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    PRADO Guilherme

    2000-01-01

    Full Text Available A ocorrência de ocratoxina A foi verificada em amostras de café solúvel e café torrado e moído, comercializados em Belo Horizonte/MG, no período de outubro/1998 a maio/1999. O método usado para a determinação de ocratoxina A foi a cromatografia líquida de alta eficiência (CLAE em combinação com cromatografia de imunoafinidade. Os valores de recuperação e coeficiente de variação de ocratoxina A foram superiores a 73% e inferiores 15%, respectivamente. As amostras de café solúvel e café torrado e moído, continham níveis de ocratoxina A entre 0,31 e 1,78ng/g e 0,99 e 5,87ng/g, respectivamente. Os resultados revelaram que o café não apresenta níveis de contaminação significativos.

  18. Significado atribuído por trabalhadores da saúde de Belo Horizonte-MG ao princípio da resolutividade nas ações cotidianas

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    Lilian Machado Torres

    2012-10-01

    Full Text Available Trata-se de estudo qualitativo, fundamentado na sociologia compreensiva, cujo objetivo foi o de compreender o significado atribuído pelos profissionais da rede hierarquizada de saúde de Belo Horizonte-MG, Brasil, ao princípio da resolutividade nas ações cotidianas de saúde. Trinta e dois trabalhadores foram os informantes desta pesquisa. Foi utilizada a entrevista semiestruturada e a técnica de análise de conteúdo. Profissionais descrevem o que é resolutividade e fatores que dificultam sua concretização. Percebem, também, que os pacientes nem sempre saem das Unidades com a resposta que desejam; e que o serviço é resolutivo no que corresponde ao seu nível de atenção, embora para a população e alguns gerentes seja o inverso. Conclui-se que se torna premente a reorganização de aspectos relacionados a este princípio doutrinário do SUS.

  19. Estudo da relação pedomorfogeológica na distribuição de solos com horizontes B textural e B nítico na paisagem de Lavras (MG Study of the relationship pedo-geomorphological in the soil distribution with argillic horizons in the landscape of Lavras (MG, Brazil

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    Marilusa Pinto Coelho Lacerda

    2008-02-01

    Full Text Available O entendimento das relações entre geologia, geomorfologia e pedologia auxilia nas atividades de classificação dos solos e na avaliação da distribuição pedológica de uma área. Este trabalho foi motivado pela escassez de estudos dessa natureza na região de Lavras (MG, onde ocorrem várias classes de solos, relacionados com a grande variedade petrológica do material de origem e com a ocorrência de domínios geomorfológicos distintos. O objetivo deste trabalho foi estudar as relações entre material de origem (relação pedogeológica, classes de relevo (relação pedogeomorfológica e solos com horizontes B textural e B nítico, visando propor um modelo da distribuição desses solos na paisagem de Lavras. Os solos com horizontes B textural e B nítico de ocorrência regional foram selecionados de acordo com o estádio de evolução, que permite preservar características das rochas parentais. Esses solos são desenvolvidos nessa região em relevos ondulados a forte ondulados, originando diferentes classes de solos com horizontes B textural e B nítico relacionados ao material de origem. Para desenvolvimento deste estudo, foram realizadas a interpretação petrológica do substrato rochoso e a individualização do relevo, por meio de classes de declividade. Mediante campanhas de campo, foram selecionados e caracterizados perfis representativos das principais classes dos solos em estudo e foram avaliadas as relações pedogeológicas associadas às relações pedogeomorfológicas, permitindo a proposição de um modelo preditivo de distribuição de solos com horizontes B textural e B nítico na paisagem de Lavras (MG.The understanding of the relationships between geology, geomorphology and pedology underlies activities of soil classification and the evaluation of the pedological distribution of an area. This study was motivated by the lack of reports of this nature for the region of Lavras (MG, where several soil classes occur

  20. Serviços de atenção domiciliar na saúde suplementar e a inserção da enfermagem em Belo Horizonte/MG Servicios de atención domiciliaria en la salud suplementaria y la inserción de la enfermería en Belo Horizonte/MG Supplementary home health care services and the inclusion of nursing in Belo Horizonte/Minas Gerais (Brazil

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    Kênia Lara Silva

    2012-01-01

    Full Text Available OBJETIVO: Analisar modalidades de serviço de atenção domiciliar discutindo a inserção da enfermagem. MÉTODOS: Estudo de caso qualitativo realizado em quatro operadoras de planos de saúde no município de Belo Horizonte/Minas Gerais. Os dados foram obtidos de entrevistas e acompanhamento de casos. RESULTADOS: Os serviços de atenção domiciliar são agrupados em três Modalidades: Cuidados prolongados no domicilio; Atenção provisória no domicilio e Uso intenso de tecnologias e de cuidados. Nas modalidades, a enfermagem assume ações assistenciais e de gestão do cuidado e qualifica a atenção por meio do uso apropriado das tecnologias leves. Há uma tendência à terceirização do serviço de enfermagem na atenção domiciliar. CONCLUSÃO: A inclusão do trabalho do enfermeiro nas modalidades de atenção domiciliar representa ao mesmo tempo um componente de redução de custos e contribui para a transição tecnológica pelo estabelecimento de novas formas de cuidado no domicilio.OBJETIVO: Analizar modalidades de servicio de atención domiciliaria discutiendo la inserción de la enfermería. MÉTODOS: Estudio de caso cualitativo realizado en cuatro operadoras de planes de salud en el municipio de Belo Horizonte/Minas Gerais. Los datos fueron obtenidos de entrevistas y acompañamiento de casos. Resultados: Los servicios de atención domiciliaria son agrupados en tres MODALIDADES: Cuidados prolongados en el domicilio; Atención provisional en el domicilio y Uso intenso de tecnologías y de cuidados. En las modalidades, la enfermería asume acciones asistenciales y de gestión del cuidado y cualifica la atención por medio del uso apropiado de las tecnologías leves. Hay una tendencia a la tercerización del servicio de enfermería en la atención domiciliaria. CONCLUSIÓN: La inclusión del trabajo del enfermero en las modalidades de atención domiciliaria representa al mismo tiempo un componente de reducción de costos y contribuye

  1. Saúde mental e a continuidade do cuidado em centros de saúde de Belo Horizonte, MG Salud mental y la continuidad del cuidado en centros de salud de una ciudad en Sudeste de Brasil Mental health and continuity of care in healthcare centers in a city of Southeastern Brazil

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    Graziella Lage Oliveira

    2008-08-01

    Full Text Available OBJETIVO: Analisar os fatores associados à continuidade do cuidado em saúde mental de pacientes encaminhados a centros de saúde. MÉTODOS: Foi conduzido um estudo de seguimento de 98 pacientes encaminhados a oito centros de saúde com equipe de saúde mental da área de abrangência de um centro de referência à saúde mental, em Belo Horizonte, MG, atendidos entre 2003 e 2004. Variáveis sociodemográficas, clínicas e referentes à continuidade foram descritas e em seguida comparadas, utilizando o teste do qui-quadrado. RESULTADOS: Após o encaminhamento, 35 pacientes não compareceram para o primeiro atendimento nos centros de saúde. Dos que o fizeram, 38 continuaram em tratamento. Retornar ao centro de referência para nova consulta após o encaminhamento e ter tido mais de dois encaminhamentos foram fatores facilitadores da continuidade do cuidado. Nenhuma característica individual esteve associada à continuidade. CONCLUSÕES: Os achados sugerem haver uma falha na proposta da linha de cuidado. A continuidade do tratamento parece estar mais relacionada a fatores referentes ao serviço do que a características do paciente.OBJETIVO: Analizar los factores asociados a la continuidad del cuidado en salud mental de pacientes encaminados a centros de salud. MÉTODOS: Fue realizado un estudio de seguimiento de 98 pacientes encaminados a ocho centros de salud con equipo de salud mental del área de alcance de un centro de referencia de salud mental, en Belo Horizonte, Sudeste de Brasil, atendidos entre 2003 e 2004. Variables sociodemográficas, clínicas y referentes a la continuidad fueron descritas y en seguida comparadas, utilizando el teste do qui-cuadrado. RESULTADOS: Después del encaminamiento, 35 pacientes no acudieron para la primera atención en centros de salud. De los que hicieron, 38 continuaron en tratamiento. Retornar al centro de referencia para nueva consulta después del encaminamiento haber tenido más de dos

  2. Avaliação da efetividade da rede municipal pública de apoio diagnóstico em patologia clínica: o caso de Belo Horizonte (MG Effectiveness assessment of public clinical laboratories: the case of Belo Horizonte, Minas Gerais State

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    Leyla Gomes Sancho

    2011-01-01

    Full Text Available Importantes mudanças na organização de redes de laboratórios públicos de patologia clínica vêm ocorrendo sem, no entanto, uma decorrente avaliação de sua efetividade organizacional. O estudo pretendeu determinar um parâmetro da efetividade da rede pública de apoio diagnóstico em patologia clínica do município de Belo Horizonte e determinar os seus pontos de corte para as seções desses laboratórios. Para tanto, se consolidou por seção e pelo conjunto dos laboratórios da rede a produção total realizada e o número de horas trabalhadas durante um período de sete meses no ano de 2008. Foi observada nas seções do conjunto dos laboratórios da rede, decorrente da inscrição dos trabalhadores no modo de produção do setor, uma variabilidade em relação ao desempenho do conjunto dos trabalhadores. O parâmetro de efetividade da rede foi estabelecido em 29,90 exames por hora e o ponto de corte assumido para as seções, como consequência da primeira análise, ficou assim estabelecido: 15,50 para hematologia, 67,29 para bioquímica, 6,45 para parasitologia, 11,35 para urinálise, 4,94 para microbiologia e 19,03 para sorologia. Concluiu-se que o processo de trabalho nos laboratórios pode gerar uma diminuição na sua efetividade, assim como, por decorrência, suscitou a necessidade da implementação da avaliação como um instrumento de gestão no setor.The organization of public clinical laboratories is experiencing changes without, however, an organizational assessment of its effectiveness. The study aimed to determine a parameter of effectiveness for public clinical laboratories of Belo Horizonte, Minas Gerais State, and set cut-off points for the sections of these laboratories. In order to do so, the total production and number of hours worked during a period of 7 months in the year 2008 were consolidated. Due to the entrance of the workers in the mode of production in the laboratories network, it could be observed a

  3. Effect of particle size of limestone on Ca, Mg and K contents in soil and in sward plants Efeito do tamanho das partículas de calcário nos teores de Ca, Mg e K no solo e em plantas forrageiras

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    Ana Viadé

    2011-04-01

    Full Text Available Liming increases crop production through improved soil conditions in acidic soils. Among the effects of liming, increased availabilities of alkaline and alkaline-earth cations are worth mention. These availabilities may be affected by the particle size of applied limestone, which influences lime reactivity. The effects of particle size and application schedule of magnesium limestone were investigated on extractable Ca, Mg and K in soil, their concentrations in sward plants and dry-matter yield. Magnesium limestone of various particle sizes was applied to experimental plots at a rate of 3 t ha-1, a grass-clover sward was sown, and the plots were monitored during three years. The finest limestone (A aplicação de calcário em solos ácidos promove aumento da produção agrícola por meio da melhoria das condições do solo. Entre os efeitos da calagem, o aumento da disponibilidade de cátions alcalinos e alcalino-terrosos são dignos de menção. Essas disponibilidades podem ser afetadas pelo tamanho das partículas do calcário aplicado, que influencia a solubilidade do mesmo. Investigaram-se os efeitos da granulometria e épocas de aplicação de calcário magnesiano nos cátions trocáveis Ca, Mg e K extraidos no solo, nas suas concentrações em plantas crescidas cultivadas nesse solo e no rendimento das suas matérias secas. Vários tamanhos de partículas de calcário magnesiano foram aplicadas às parcelas experimentais, a uma taxa de 3 t ha-1, gramíneas e trevo foram plantados e as parcelas foram monitoradas durante três anos. O calcário mais fino (< 0,25 mm em uma única aplicação proporcionou os maiores teores de Ca e Mg extraídos por Mehlich-3 e por NH4Cl. Este mesmo calcário quando aplicado parcelado em três doses anuais foi menos eficaz. Parcelas tratadas com o clacário mais grosseiro (2-4 mm não diferiram da testemunha. A calagem não teve efeito sobre o potássio, quer seja no solo ou nas plantas. As concentrações no

  4. Comparação das respostas cardiorrespiratórias de um exercício de hidroginástica com e sem deslocamento horizontal nos meios terrestre e aquático Comparisons of cardiorrespiratory responses in a hydrogymnastics exercise with and without horizontal movement on land and in aquatic environment

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    Ana Carolina Kanitz

    2010-09-01

    Full Text Available O objetivo do estudo foi comparar as respostas cardiorrespiratórias de um exercício de hidroginástica (corrida estacionária realizado com e sem deslocamento horizontal no meio terrestre (MT, em piscina funda (PF e em piscina rasa (PR. Seis mulheres jovens realizaram os exercícios durante 4 min numa cadência de 80 bpm. O exercício consistia em flexão e extensão de quadril com os braços simulando um movimento de corrida. A frequência cardíaca (FC e o consumo de oxigênio (VO2 foram coletados no último minuto de exercício e a percepção de esforço (PE foi coletada ao término do exercício. Para a comparação das variáveis utilizou-se ANOVA two-way para medidas repetidas com fatores meio e forma de execução (p The aim of the study was to compare the cardiorespiratory responses during an hydrogymnastics exercise performed with and without horizontal movement on land environment (LE and in a deep (DS and in a shallow swimming pool (SS. Six YOUNG women performed the exercise during four minutes in each environment (LE, DS and SS and situation (with and without horizontal movement in a cadence of 80 bpm. The exercise consisted in a hip flexion/extension while the arms simulating a running movement. The heart rate (HR and oxygen uptake (VO2 were veriefied during the last minute in each exercise and the rate of perceived exertion (RPE was collected in the ending of the exercise. To variables comparisons was used ANOVA two-way for repeated measures with factors environment and situation (p < 0,05. For all cardiorespiratory variables analyzed, SS exercise were lower than that found on LE. Although, no difference was observed in the exercise performed on LE or in DS, except for the HR, that was lower during DS. Acording to the different situations, higher HR value was found during the exercise with horizontal movement when compared with the exercise without horizontal movement in the DS. These findings suggest the possibility to perform

  5. Condições de trabalho nos ônibus e os transtornos mentais comuns em motoristas e cobradores: Região Metropolitana de Belo Horizonte, Minas Gerais, Brasil, 2012

    Directory of Open Access Journals (Sweden)

    Ada Ávila Assunção

    2013-12-01

    Full Text Available A prevalência de transtornos mentais comuns (TMC contribui para a carga mundial de doenças. O objetivo foi descrever a prevalência de TMC numa amostra de motoristas e cobradores da Região Metropolitana de Belo Horizonte, Minas Gerais, Brasil, e verificar se as condições do trânsito e as condições internas aos ônibus estavam associadas ao desfecho. Os respondentes foram 1.607 trabalhadores. A amostra não probabilística foi estimada de acordo com as quotas do efetivo distribuído nas empresas de ônibus (n = 17.470. As entrevistas face a face utilizaram o questionário digital. Trânsito ruim perdeu significância estatística na análise multivariável; renda mais elevada e condições de trabalho e de segurança inadequadas mantiveram-se associadas ao desfecho. Comportamentos nocivos e situação vulnerável de saúde foram associados com TMC. Abordar a saúde dos trabalhadores dos ônibus urbanos é uma rara contribuição que pode amparar a elaboração de políticas públicas dirigidas às populações metropolitanas.

  6. Tendências recentes nos elementos do clima e suas implicações na evapotranspiração da cultura do milho em Viçosa - MG Recent trends in the weather elements and its implications in the maize crop evapotranspiration in Viçosa-MG, Brazil

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    Leonidas P. de Alencar

    2011-01-01

    Full Text Available A mudança nas condições climáticas tem gerado grandes preocupações em nível mundial, sendo que uma das grandes questões, neste contexto, é o aquecimento global. As alterações ocorridas nas condições climáticas podem afetar a demanda de água das plantas, porque a evapotranspiração é afetada por mudanças nos elementos climáticos. O objetivo deste trabalho foi analisar os efeitos das possíveis mudanças dos elementos do clima na evapotranspiração de referência e na evapotranspiração da cultura do milho para a região de Viçosa - MG. Mediante análise de tendência pelo teste de Mann-Kendall e da estatística do teste t da regressão linear, verificou-se o comportamento dos seguintes elementos climáticos: temperaturas máxima e mínima, insolação, velocidade do vento e umidade relativa. Observou-se uma redução na evapotranspiração de referência e da cultura do milho ao longo dos últimos 41 anos, principalmente em razão da redução da insolação e da velocidade do vento. A evapotranspiração de referência apresentou redução da ordem de 4,2 mm por ano.The change in weather conditions has caused great concern in the world and the major issue, in this context, is the global warming. The changes in climate may affect the water demand of plants, because the evapotranspiration is affected by changes in climatic elements. The objective of this study was to examine the possible effects of climatological changes in evapotranspiration and reference evapotranspiration of corn in Viçosa - MG, Brazil. Trend analysis by the Mann-Kendall statistic and student t test of the linear regression were used to study the behavior of the following weather elements: maximum and minimum temperatures, sunshine duration, wind speed and relative humidity. It was observed a reduction in the reference evapotranspiration and maize crop evapotranspiration over the recent past 41 years, mainly because of reduced solar radiation and wind

  7. ERRÂNCIA E EXÍLIO NA SOUL MUSIC: do movimento Black-Rio nos anos 70 ao Quarteirão do Soul em Belo Horizonte, 2010WANDERING AND EXILE IN SOUL MUSIC: the Black-Rio movement in the 70’s to the Quarteirão do Soul in Belo Horizonte, 2010

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    Rita Aparecida da Conceição Ribeiro

    2010-12-01

    The twentieth century witnessed several diasporas. Some of them clearly addressed by the vehicles of mass communication, others less so. This study addresses the emergence of a movement of affirmation of black identity in Brazil, the movement Black-Rio, which appeared in the mid-70s. It suffered persecution, not only on the political side, but also from the media, until its extinction in the same decade. The importance of the Black-Rio was confirmed thirty years later, with the constitution of the Quarteirão do Soul in Belo Horizonte, a movement with similar ideology. It started downtown in 2004 with a group of friends, became a space of sociability and affirmation of black identity and, like its predecessor, begins to suffer harassment. Keywords: Black identity. Soul music. Mass culture.

  8. Saúde mental e a continuidade do cuidado em centros de saúde de Belo Horizonte, MG Salud mental y la continuidad del cuidado en centros de salud de una ciudad en Sudeste de Brasil Mental health and continuity of care in healthcare centers in a city of Southeastern Brazil

    OpenAIRE

    Graziella Lage Oliveira; Waleska Teixeira Caiaffa; Mariangela Leal Cherchiglia

    2008-01-01

    OBJETIVO: Analisar os fatores associados à continuidade do cuidado em saúde mental de pacientes encaminhados a centros de saúde. MÉTODOS: Foi conduzido um estudo de seguimento de 98 pacientes encaminhados a oito centros de saúde com equipe de saúde mental da área de abrangência de um centro de referência à saúde mental, em Belo Horizonte, MG, atendidos entre 2003 e 2004. Variáveis sociodemográficas, clínicas e referentes à continuidade foram descritas e em seguida comparadas, utilizando o tes...

  9. Aplicabilidade da ICPC 14 e seus Efeitos nos Índices Financeiros: Um Estudo de Caso na Cooperativa de Crédito da Região de Tiros e Matutina/MG – SICOOB Creditiros

    OpenAIRE

    Aplicabilidade da ICPC 14 e seus Efeitos nos Índices Financeiros: Um Estudo de Caso na Cooperativa de Crédito da Região de Tiros e Matutina/MG – SICOOB Creditiros; Wemerson Dias Ribeiro

    2015-01-01

    O Conselho Federal de Contabilidade (CFC) bem como o Comitê de Pronunciamentos Contábeis (CPC), em sua Instrução de Pronunciamentos Contábeis – ICPC 14, indicam que as cotas partes dos cooperados em cooperativas e similares devem ser transferidas no todo ou em partes do Patrimônio Líquido para o Passivo Não Circulante. Essa instrução altera a estrutura patrimonial das cooperativas podendo causar um impacto nos seus indicadores financeiros. Diante disso, o presente artigo tem por o...

  10. Aplicabilidade da ICPC 14 e seus Efeitos nos Índices Financeiros: Um Estudo de Caso na Cooperativa de Crédito da Região de Tiros e Matutina/MG – SICOOB Creditiros

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    Aplicabilidade da ICPC 14 e seus Efeitos nos Índices Financeiros: Um Estudo de Caso na Cooperativa de Crédito da Região de Tiros e Matutina/MG – SICOOB Creditiros

    2015-06-01

    Full Text Available O Conselho Federal de Contabilidade (CFC bem como o Comitê de Pronunciamentos Contábeis (CPC, em sua Instrução de Pronunciamentos Contábeis – ICPC 14, indicam que as cotas partes dos cooperados em cooperativas e similares devem ser transferidas no todo ou em partes do Patrimônio Líquido para o Passivo Não Circulante. Essa instrução altera a estrutura patrimonial das cooperativas podendo causar um impacto nos seus indicadores financeiros. Diante disso, o presente artigo tem por objetivo analisar o efeito da Norma ICPC 14 na estrutura patrimonial e nos principais índices financeiros da Cooperativa de Crédito da região de Tiros e Matutina SICOOB-CREDITIROS. Foram utilizados como arcabouços teóricos: Sociedades Cooperativas; Normas Internacionais de Contabilidade e Norma ICPC 14 e Análises Financeiras. O trabalho foi elaborado a partir de dados extraídos dos balanços patrimoniais semestrais da SICOOB-CREDITIROS dentre os períodos de 2010 a 2013, foram observados os principais índices financeiros antes e depois da aplicação da Norma ICPC 14 representados graficamente, estatisticamente realizou-se o Teste t de Médias Emparelhadas para dados com distribuição normal e para dados com distribuição anormal foi aplicado o Teste de Man-Whitney. Pôde se concluir que os indicadores de Liquidez Geral, Endividamento Geral e Participação no Capital de Terceiros se apresentaram desfavoráveis, o índice Liquidez Corrente permaneceu inalterado e os índices de Composição do Endividamento e Retorno sobre o Patrimônio Líquido sofreram variações favoráveis em relação ao ICPC 14. Sendo que o efeito nos indicadores que sofreram alterações resultantes da Norma ICPC14, foi significativo.

  11. A percepção da equipe de enfermagem sobre liderança no serviço de urgência e emergência de um hospital geral de Belo Horizonte, MG

    Directory of Open Access Journals (Sweden)

    Karla Rona Silva

    2011-10-01

    Full Text Available No serviço de urgência e emergência a liderança é importante para efetividade do trabalho do grupamento de enfermagem, podendo interferir diretamente nas articulações entre os membros da equipe, refletindo na assistência e recuperação do paciente. O Objetivo deste estudo foi avaliar a percepção da equipe de enfermagem sobre liderança no serviço de urgência e emergência, a influência no desenvolvimento do trabalho e, conseqüentemente, as relações interprofissionais. Além disso, pretendeu-se traçar o perfil desses profissionais. Foi utilizada uma abordagem quantitativa e qualitativa, através de questionário, aplicado a 20 técnicos de enfermagem e 4 enfermeiros e  entrevistas com 4 profissionais de cada uma dessas áreas, atuantes na equipe do serviço de atendimento de urgência e emergência de um hospital geral de grande porte, de Belo Horizonte. Observou-se que com relação ao significado do trabalho em equipe 5 (21% entenderam ser um agrupamento de diversos profissionais em determinado local desenvolvendo atividades no mesmo horário e para 19 (79% o trabalho em equipe consiste na união de um grupo de pessoas em torno de um objetivo comum. Os 16 (67% técnicos perceberam o enfermeiro como um líder democrático, contudo afirmaram que não foram preparados para exercer liderança durante sua formação e que essa capacitação acontece com a vivência cotidiana. Concluiu-se que a liderança é fundamental para o desenvolvimento da atividade de trabalho em equipe. Percebeu-se que esses profissionais possuem uma visão crítica da capacidade de liderar e sabem identificar a qual tipo de liderança estão submetidos e como interfere nas articulações do trabalho.

  12. Explorando nuevos horizontes en NASA

    Science.gov (United States)

    Villanueva, G. L.

    A pesar de la incesante expansión del Universo iniciada con el Big Bang 14 mil millones de años atrás, nuestro Universo se siente cada día más cercano. La inquebrantable vocación de la humanidad por descubrir nuevos horizontes ha permitido el acercamiento de civilizaciones en nuestro planeta y nos ha permitido conocer nuestro lugar en el Universo como nunca antes. En este artículo presento una breve sinopsis de nuestro trabajo que se relaciona con diversas investigaciones con implicaciones astrobiológicas, desde el origen de los ingredientes de la "sopa de la vida", hasta la evolución y composición de la atmósfera de Marte.

  13. Formação de Competências Profissionais em Alunos do Curso de Fisioterapia de uma IES da Região Metropolitana de Belo Horizonte/MG: análise a partir das percepções dos discentes

    Directory of Open Access Journals (Sweden)

    Gonçalves, Glauber Miguel

    2013-12-01

    Full Text Available The objective of this article was to analyze and describe the perceptions of students regarding the contribution of the undergraduate course in physical therapy in the training of professional skills of future physical therapists. Regarding the methodological process to research was characterized as field, quantitative and descriptive with the students in the course of Physiotherapy for an institution of Higher Education - IHE of the metropolitan region of Belo Horizonte/MG. The analysis was from the model of Fleury and Fleury (2001 of professional skills. It was concluded that only in relation to competence know mobilize resources of people, financial and material the students not ranked only favorably in Course of Physiotherapy the IHE under study, but opine that the Course develops the other powers prescribed by DCN.

  14. Previsão de bitter pit em maçãs por meio da infiltração de Mg2+ e da aplicação de ethephon nos frutos Prediction of bitter pit in apples through Mg2+ infiltration and ethephon application on fruits

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    Ivan Sestari

    2009-10-01

    Full Text Available Estudou-se o efeito da infiltração de magnésio e cálcio no desenvolvimento de sintomas de bitter pit de maçãs 'Gala'. Examinou-se, também, a eficiência da infiltração de magnésio e da aceleração da maturação de maçãs 'Royal Gala' como métodos de previsão da ocorrência de bitter pit após o armazenamento. No primeiro experimento, maçãs 'Gala' foram infiltradas com MgCl2; CaCl2 ou MgCl2 mais CaCl2. No segundo experimento, maçãs 'Royal Gala' foram infiltradas com MgCl2; ou imersas em solução contendo ethephon por cinco minutos. Como controle, frutos de cada cultivar foram armazenados em atmosfera controlada por seis meses mais 18 dias a 20°C. Frutos infiltrados com MgCl2 apresentaram significativo acréscimo na incidência e severidade de bitter pit, proporcional à concentração de MgCl2 na solução. Frutos infiltrados com CaCl2 não apresentaram sintomas de bitter pit. A aceleração da maturação de maçãs 'Royal Gala' na colheita foi efetiva na previsão de bitter pit após o armazenamento.The effect of magnesium and calcium infiltration on bitter pit symptoms development in Gala apples was studied. It was also examined the efficiency of magnesium infiltration and the ripening hastening of Royal Gala apples as a predictive methods of bitter pit occurrence after storage. In the first experiment, Gala apples were infiltrated with MgCl2; CaCl2; or MgCl2 plus CaCl2. In the second experiment Royal Gala apples were infiltrated with MgCl2; or immersed into solution containing ethephon during five minutes. As a control a sample of each cultivar was stored in controlled atmosphere during 6 months plus eighteen days at 20°C. Fruits infiltrated with MgCl2 showed increased incidence and severity of bitter pit proportional to the MgCl2 concentration in the solution. Infiltration with CaCl2 prevents bitter pit-like symptoms. The ripening hastening of Royal Gala apples at harvest was effective on the bitter pit prediction after

  15. Validade e reprodutibilidade de marcadores do consumo de alimentos e bebidas de um inquérito telefônico realizado na cidade de Belo Horizonte (MG, Brasil Validity and reliability of foods and beverages intake obtained by telephone survey in Belo Horizonte, Brazil

    Directory of Open Access Journals (Sweden)

    Larissa Loures Mendes

    2011-09-01

    Full Text Available OBJETIVO: avaliar a reprodutibilidade e validade de indicadores de consumo de alimentos e bebidas levantados por meio de entrevistas telefônicas pelo Sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Telefone (VIGITEL. MÉTODOS: A reprodutibilidade foi aferida por meio de entrevistas repetidas com intervalos de 7 a 15 dias a partir da primeira entrevista original do sistema (n=258. A validade foi avaliada usando como padrão ouro 3 entrevistas correspondentes a recordatórios de 24h (R24h em 3 dias da semana, após 7 a 15 dias da entrevista telefônica original (n=217. No estudo de reprodutibilidade a estatística kappa foi utilizada para medir a concordância entre os resultados das proporções obtidas na primeira e na segunda entrevista. Para a validação, a proporção de referência positiva de alimentos e bebidas na entrevista telefônica original foi comparada àquela obtida nos R24h e sua avaliação foi analisada por meio do cálculo da sensibilidade, especificidade e valor preditivo positivo. RESULTADOS: No estudo de reprodutibilidade, observou-se concordância quase perfeita para o indicador de consumo de leite com teor integral de gordura (0,86; concordância substancial para consumo de frutas (0,67, consumo de frutas e hortaliças, consumo de carne com gordura ou frango com pele e consumo abusivo de bebida alcoólica; concordância moderada para o indicador de consumo de refrigerante; e concordância regular para o indicador do consumo de hortaliças. Com relação ao estudo de validação, observou-se subestimação de indicadores de consumo de frutas, hortaliças e leite integral, exceto para consumo de carne/frango com gordura e bebida alcoólica, quando comparados com a frequência desse consumo estimada a partir dos três R24horas; as diferenças para o consumo de refrigerantes foi inexpressiva. CONCLUSÃO: Verificou-se que os instrumentos utilizados permitem a vigilância de fatores

  16. Políticas e práticas de gestão ambiental: uma análise da gestão dos resíduos da construção civil na cidade de Belo Horizonte (MG

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    Paulo José Silva

    Full Text Available Este artigo tem por objetivo estudar as práticas de gestão de resíduos da construção civil implementadas pelo poder público municipal na cidade de Belo Horizonte (MG. Para isso, empregou-se o método de estudo de caso articulado com o processo de triangulação das técnicas de coleta de dados. A natureza da problemática estudada exigiu a sistematização de um quadro de referências que inclui algumas reflexões teóricas sobre a relação entre Estado, políticas públicas e gestão ambiental. A análise dos resultados evidencia que o poder público da cidade de Belo Horizonte articulou e implementou um conjunto de políticas e práticas de gestão dos resíduos da construção que deu origem a uma policy network, a qual, além de ser por ele coordenada, envolve a participação de diversos atores sociais públicos e privados. Trata-se de uma configuração institucional com um padrão de relações interdependentes que servem de referência para a concretização das práticas de gestão de resíduos da construção civil. Os resultados deste estudo apontam também os benefícios econômicos, sociais e ambientais, além das dificuldades relativas ao processo de institucionalização das referidas políticas e práticas.

  17. Contraste de condutividade hidráulica em solos de texturas arenosa e argilosa encontrados nos tributários da margem esquerda do rio tijuco, município de Ituiutaba (MG / DISTINCTION OF THE HYDRAULIC CONDUCTIVITY BETWEEN SAND AND CLAYEY TEXTURE SOILS FROM TRIBUTARY OF THE TIJUCO LEFT BORDER RIVER, ITUIUTABA, MINAS GERAIS STATE, BRAZIL

    Directory of Open Access Journals (Sweden)

    Luiz Antonio de LAO Oliveira

    2010-05-01

    Full Text Available O objetivo principal deste trabalho é determinar as diferenças de condutividade hidráulica entre solos de textura arenosa e argilosa nos tributários da margem esquerda do Rio Tijuco, município de Ituiutaba/MG. Utilizou-se as técnicas de anéis concêntricos e open end hole para a determinação das condutividades hidráulicas na superfície do terreno e nas profundidades de 0,5, 1,0 e 1,5 m. Análise granulométrica indicou texturas franco-argilo-arenosa para os latossolos vermelhos, e argilosa para os nitossolos vermelhos férricos. Os valores de condutividade hidráulica de superfície nos pontos P1, P2, P3, P4, P5 e P6 variaram entre 1x10-4 a 9x10-5. A 0,5 m de profundidade os valores variaram entre 9x10-7 a 9x10-6; para a profundidade de 1,0 m, os valores estiveram entre 5x10-6 e 1x10-6, finalmente, os resultados para a profundidade de 1,5 m, os valores variaram entre 5x10-6 a 1x10-6. Análise dos resultados demonstra que a estrutura do solo exerce maior controle na condutividade hidráulica (respectiva eficiência de infiltração de que a granulometria. Nesse caso, os nitossolos, mesmo sendo solos mais argilosos que os latossolos, de modo geral, apresentaram resultados maiores de condutividade hidráulica em função da alta densidade de fendas, típicas de expansão e contração de argilas de alta atividade.

  18. Belo Horizonte em recortes

    Directory of Open Access Journals (Sweden)

    Ivete Lara Camargos Walty

    1998-03-01

    Full Text Available A partir do conceito de rizoma de Deleuze e Guatari, faz-se uma montagem de trechos de textos literários sobre Belo Horizonte, intercalados com extratos do livro As cidades invisíveis, de Italo Calvino, como objetivo de se esboçar faces/retratos da cidade.

  19. Horizontal violence in Nursing

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    Tsimoulaki Evangelia

    2017-01-01

    Full Text Available One’s effort to clarify the definition of horizontal labour violence is of great importance, due to the variety of definitions that are mentioned in the worldwide scientific literature. Furthermore, the reference of multiple forms of such violence herein the nurse professional group is challenging, as well. Another fact of great importance is that, any form of professional violence (horizontal violence, horizontal mobbing in the work place environment can be possibly escalated and include even physical abuse (Bullying, besides the psychological and emotional impact for the victim. The definitions of Horizontal violence, Mobbing and Bullying, include a repeated negative behaviour emanating from at least one “predator” towards at least one “victim”, with work status differences and the existence or lack of physical abuse (Bullying. Horizontal violence is a hostile, aggressive and harmful behaviour which is either overt or concealed and is pointed from an individual to another individual of the same working rank and causes intense emotional pain at the victim. The manifestations vary from humiliating tasks assignment or the victim’s efforts undermining to clearly aggressive behaviors (criticism, intimidation, sarcasm etc.. The reason behind this phenomenon is multifactorial extended not only towards the working environment but also to the personal characteristics of the “predator” as well as the possible “victim”. The researchers emphasize the high incidence of the phenomenon, as well as the cost that is induced by the violent behaviors to both the health professionals and the hospital. Finally, they point out the paradox of the presence of violence inside a system that is designed to promote health.

  20. Resultados econômicos da atividade leiteira na região de Lavras (MG nos anos 2004 e 2005: um estudo multicasos Economical results of milk production systems in Lavras region (MG throughout the years 2004 and 2005: a multicase study

    Directory of Open Access Journals (Sweden)

    M.A. Lopes

    2008-04-01

    Full Text Available Estudou-se a rentabilidade da atividade leiteira de 17 propriedades da região de Lavras/MG e identificaram-se os componentes que exerceram maior influência sobre os custos finais da atividade. Os dados foram coletados mensalmente durante o período de janeiro de 2004 a dezembro de 2005. Considerou-se a margem bruta, a margem líquida e o resultado (lucro ou prejuízo como indicadores de eficiência econômica. Os itens componentes do custo operacional efetivo que exerceram maior influência sobre os custos da atividade leiteira foram, em ordem decrescente, alimentação (55,9%, mão-de-obra (19,1%, despesas diversas (11,3%, energia (7,1%, sanidade (4,9%, ordenha (0,74%, impostos (0,74% e inseminação artificial (0,23%. A margem líquida e o resultado positivo indicam que os pecuaristas têm condições de produzir a médio e a longo prazo, com conseqüente capitalização. Os resultados do estudo não podem ser extrapolados por não se tratar de uma amostra probabilística.It was studied the profitability of the milk production in 17 properties in the region of Lavras (MG, and the components that had the greatest influence on the final costs of the business were identified. The data were monthly collected from January 2004 to December 2005. The gross margin, net margin, and the result (profit or loss were taken into consideration as indicators of economic efficiency. The component items of the effective operational cost that had the greatest influence upon the costs of dairy business were, in decreasing order, feeding (55.9%, labor (19.1%, different expenses (11.3%, energy (7.1%, health (4.9%, milking (0.74%, taxes (0.74%, and artificial insemination (0,23%. The net margin and the positive result show the farmers have conditions to produce in middle and long terms, with consequent capitalization. Although, the results of the study can not be extrapolated, since they do not represent a random sampling.

  1. Horizontal drilling activity in Manitoba

    Energy Technology Data Exchange (ETDEWEB)

    Fox, J.

    1997-04-01

    An update of horizontal well drilling in Manitoba was provided. Manitoba`s productive formations are: (1) the Bakken Formation, (2) the Lodgepole Formation, (3) the Mission Canyon Formation, (4) the Amaranth Formation, and (5) the Melita Formation. A total of 28 exploratory wells and 29 development wells, including 11 horizontal wells were drilled in 1996. The 11 horizontal wells accounted for 30 per cent of the drilling meterage. The leading drillers for horizontal wells in Manitoba are Tundra Oil and Gas, Chevron, Anderson and HCO. Production from horizontal wells in 1996 totaled 310 cubic meter per day. To date, no horizontal wells have been drilled in the Bakken Formation. The least successful horizontal well application has been in the Lodgepole Formation. A summary of horizontal well production was provided for each Formation. 4 tabs., 10 figs.

  2. HORIZONTAL BOILING REACTOR SYSTEM

    Science.gov (United States)

    Treshow, M.

    1958-11-18

    Reactors of the boiling water type are described wherein water serves both as the moderator and coolant. The reactor system consists essentially of a horizontal pressure vessel divided into two compartments by a weir, a thermal neutronic reactor core having vertical coolant passages and designed to use water as a moderator-coolant posltioned in one compartment, means for removing live steam from the other compartment and means for conveying feed-water and water from the steam compartment to the reactor compartment. The system further includes auxiliary apparatus to utilize the steam for driving a turbine and returning the condensate to the feed-water inlet of the reactor. The entire system is designed so that the reactor is self-regulating and has self-limiting power and self-limiting pressure features.

  3. PRODUCTIVITY OF FRACTURED HORIZONTAL WELLS

    Directory of Open Access Journals (Sweden)

    Stjepan Antolović

    2009-12-01

    Full Text Available The interest and performance of horizontal drilling and completions has increased during the last two decades. Horizontal wells are advantageous compared to vertical wells in thin reservoirs, reservoirs with favorable vertical permeability and reservoirs with water and gas coning problems. In many reservoirs, the ratio of horizontal permeability to the vertical permeability is substantially larger than one and often is close to 10. Thus, these reservoirs are very good candidates for hydraulic fracturing. By hydraulic fracturing one or more fractures are created, which can be longitudinal or orthogonal. By that, flow is altered and it mostly conducts horizontally through reservoir toward horizontal wellbore. With this altered flow, fluid is produced faster, with less pressure loss by fluid unit of produced fluid. Some of the existing mathematical models to determine the productivity of multifractured horizontal wells are presented in this work (the paper is published in Croatian.

  4. Implementação da estratégia Atenção Integrada às Doenças Prevalentes na Infância no Nordeste, Brasil Investigación sobre uso de medicamentos por ancianos jubilados, Belo Horizonte,MG Implementation of the Integrated Management of Childhood Illnesses strategy in Northeastern Brazil

    Directory of Open Access Journals (Sweden)

    João Joaquim Freitas do Amaral

    2008-08-01

    Full Text Available OBJETIVO: A maioria das mortes em crianças é evitável. A estratégia Atenção Integrada às Doenças Prevalentes na Infância, desenvolvida pela Organização Mundial da Saúde e Fundo das Nações Unidas para a Infância, pretende reduzir a mortalidade infantil por meio de ações para melhorar o desempenho dos profissionais de saúde, a organização do sistema de saúde e as práticas da família e da comunidade. O artigo teve por objetivo descrever fatores associados à implementação dessa estratégia em três estados do Nordeste do Brasil. MÉTODOS: Estudo ecológico realizado em 443 municípios do Ceará, Paraíba e Pernambuco, em 2006. A distribuição de variáveis independentes econômicas, geográficas, ambientais, nutricionais, organização do serviço de saúde e mortalidade infantil foram comparadas entre os municípios com e sem a estratégia. Esses fatores foram avaliados por meio de modelo hierárquico utilizando regressão de Poisson para o cálculo de razões de prevalências após ajuste para fatores de confusão. RESULTADOS: Dos municípios estudados, 54% possuíam a estratégia: Ceará (65 com e 43 sem, Paraíba (27 com e 21 sem e Pernambuco (147 com e 140 sem. Após controle para fatores de confusão, os fatores significativamente associados com a ausência da estratégia, foram: menor índice de desenvolvimento humano, menor população e maior distância da capital. CONCLUSÕES: Houve iniqüidade no desenvolvimento da estratégia, pois municípios de maior risco para a saúde infantil apresentaram menores taxas de aplicação de suas ações. São necessárias políticas de saúde que reforcem sua consolidação nos municípios de maior risco de mortalidade infantil.OBJETIVO: Caracterizar el uso de medicamentos por jubilados y pensionistas ancianos, con énfasis en las diferencias entre géneros. MÉTODOS: Investigación domiciliar conducida con muestra aleatoria simple de 667 individuos con 60 años o m

  5. "NOME" NOS SALMOS

    Directory of Open Access Journals (Sweden)

    Luis Stadelmann

    1997-01-01

    Full Text Available "Nome" ocorre 96 vezes nos Salmos de maneira diferente do uso comum que dele se faz na nossa linguagem. O motivo é que "nome" é um termo referencial que designa a Deus cultuado na liturgia da comunidade dos fiéis. Distinguimos duas modalidades no uso de "nome": a primeira consiste na invocação do "nome" em súplicas pela intervenção de Deus, para que venha em auxílio dos homens por meio do seu poder irresistível, de sua autoridade suprema e de sua soberania ilimitada; a segunda se emprega nos encâmios ao "nome" para enaltecer a glória, honra e santidade de Deus.

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

    Directory of Open Access Journals (Sweden)

    Ruthanna Isabelle de Oliveira

    2014-10-01

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

  7. Horizontal and Vertical Line Designs.

    Science.gov (United States)

    Johns, Pat

    2003-01-01

    Presents an art lesson in which students learn about the artist Piet Mondrian and create their own abstract artworks. Focuses on geometric shapes using horizontal and vertical lines. Includes background information about the artist. (CMK)

  8. Notes on the horizontal cohomology

    OpenAIRE

    Verbovetsky, Alexander

    1998-01-01

    This paper is devoted to the horizontal (``characteristic'') cohomology of systems of differential equations. Recent results on computing the horizontal cohomology via the compatibility complex are generalized. New results on the Vinogradov C-spectral sequence and the Krasil'shchik C-cohomology are obtained. As an application of general theory, the examples of an evolution equation and a p-form gauge theory are explicitly worked out.

  9. Mechanisms of Horizontal Gene Transfer

    OpenAIRE

    Cafini Barrado, Fabio; Medrano Romero, Verónica; Morikawa, Kazuya

    2017-01-01

    Horizontal gene transfer plays important roles in the evolution of S. aureus, and indeed, a variety of virulence factors and antibiotic resistance genes are embedded in a series of mobile genetic elements. In this chapter, we review the mechanisms of horizontal gene transfer, including recent findings on the natural genetic competence. Then, we consider the transfer of two important antibiotic resistance genes: the methicillin resistance gene, mecA (in Staphylococcal Cassette Chromosome) and ...

  10. Offre pour nos membres

    CERN Multimedia

    Staff Association

    2016-01-01

    Walibi Rhône-Alpes accueille son événement Halloween FreakShow le week-end du 15 et 16 octobre puis tous les jours du 20 octobre au 02 novembre 2016 ! ouverture prolongée jusqu’à 19h et feu d’artifices chaque soir 29, 30 et 31 octobre ! Loup-garou show; 1 labyrinthe; jeu de piste sur le parc (et nombreux lots à gagner); animations (sculpture sur citrouilles et maquillage) et d'autres surpises ! Tarifs pour nos membres : Entrée "Zone terrestre": 23 € au lieu de 29 €. Entrée gratuite pour les enfants de moins de 3 ans, avec accès aux attractions limité. Parking gratuit.

  11. DRILL BITS FOR HORIZONTAL WELLS

    Directory of Open Access Journals (Sweden)

    Paolo Macini

    1996-12-01

    Full Text Available This paper underlines the importance of the correct drill bit application in horizontal wells. Afler the analysis of the peculiarities of horizontal wells and drainholes drilling techniques, advantages and disadvantages of the application of both roller cone and fixed cutters drill bits have been discussed. Also, a review of the potential specific featuries useful for a correct drill bit selection in horizontal small diameter holes has been highlighted. Drill bits for these special applications, whose importance is quickly increasing nowadays, should be characterised by a design capable to deliver a good penetration rate low WOB, and, at the same time, be able to withstand high RPM without premature cutting structure failure and undergauge. Formation properties will also determine the cutting structure type and the eventual specific features for additional gauge and shoulder protection.

  12. Nuclear component horizontal seismic restraint

    Science.gov (United States)

    Snyder, Glenn J.

    1988-01-01

    A nuclear component horizontal seismic restraint. Small gaps limit horizontal displacement of components during a seismic occurrence and therefore reduce dynamic loadings on the free lower end. The reactor vessel and reactor guard vessel use thicker section roll-forged rings welded between the vessel straight shell sections and the bottom hemispherical head sections. The inside of the reactor guard vessel ring forging contains local vertical dovetail slots and upper ledge pockets to mount and retain field fitted and installed blocks. As an option, the horizontal displacement of the reactor vessel core support cone can be limited by including shop fitted/installed local blocks in opposing alignment with the reactor vessel forged ring. Beams embedded in the wall of the reactor building protrude into apertures in the thermal insulation shell adjacent the reactor guard vessel ring and have motion limit blocks attached thereto to provide to a predetermined clearance between the blocks and reactor guard vessel ring.

  13. Nurses’ Perceptions of Horizontal Violence

    Directory of Open Access Journals (Sweden)

    Rosemary Taylor

    2016-04-01

    Full Text Available In this article, I describe a study exploring horizontal violence and nurses’ perceptions of the phenomenon within the context of two 28-bed inpatient hospital units. The purpose of the study was to develop a clearer understanding of horizontal violence, incorporating observation and inquiry to identify the language nurses use to describe their experiences and factors in the nursing work environment that may perpetuate the phenomenon. Observation, review and analysis of policies, and interviews with staff were completed between June and November 2012. Thematic analysis resulted in five themes: (a behaviors are minimized and not recognized, (b fear inhibits all reporting, (c avoidance and isolation are coping strategies, (d lack of respect and support, and (e organizational chaos. The findings suggest future interventions must address a range of factors that perpetuate horizontal violence within the nursing work environment with consideration for the embeddedness and complexity of the phenomenon.

  14. Speckle Imaging Over Horizontal Paths

    Energy Technology Data Exchange (ETDEWEB)

    Carrano, C J

    2002-05-21

    Atmospheric aberrations reduce the resolution and contrast in surveillance images recorded over horizontal or slant paths. This paper describes our recent horizontal and slant path imaging experiments of extended scenes as well as the results obtained using speckle imaging. The experiments were performed with an 8-inch diameter telescope placed on either a rooftop or hillside and cover ranges of interest from 0.5 km up to 10 km. The scenery includes resolution targets, people, vehicles, and other structures. The improvement in image quality using speckle imaging is dramatic in many cases, and depends significantly upon the atmospheric conditions. We quantify resolution improvement through modulation transfer function measurement comparisons.

  15. The eNOS enhancer AVE 9488: a novel cardioprotectant against ischemia reperfusion injury.

    Science.gov (United States)

    Frantz, S; Adamek, A; Fraccarollo, D; Tillmanns, J; Widder, J D; Dienesch, C; Schäfer, A; Podolskaya, A; Held, M; Ruetten, H; Ertl, G; Bauersachs, J

    2009-11-01

    Nitric oxide (NO) is an important regulator of vascular and myocardial function. Cardiac ischemia/reperfusion injury is reduced in mice overexpressing endothelial NO synthase (eNOS) suggesting cardioprotection by eNOS. Novel pharmacological substances, so called eNOS enhancers, upregulate eNOS expression and thereby increase NO production. We tested the effects of the eNOS enhancer AVE 9488 on cardiac ischemia/reperfusion injury in vivo in mice. After treatment with the eNOS enhancer AVE 9488 (30 mg/kg/day) or placebo for one week mice underwent 30 min of coronary artery ligation and 24 h of reperfusion in vivo. Ischemia-reperfusion damage was significantly reduced in mice treated with the eNOS enhancer when compared to placebo treated mice (infarct/area at risk 65.4 +/- 4.1 vs. 36.9 +/- 4.0%, placebo vs. eNOS enhancer, P = 0.0002). The protective effect was blunted in eNOS knockout mice treated with the eNOS enhancer (infarct/area at risk 64.1 +/- 6.2%, eNOS knockout + eNOS enhancer vs. WT + eNOS enhancer, P = ns). Reactive oxygen species were significantly reduced in mice treated with the eNOS enhancer as indicated by significantly lower malondialdehyde-thiobarbituric acid levels (placebo vs. eNOS enhancer, 3.2 +/- 0.5 vs. 0.8 +/- 0.07 micromol/l, P = 0.0003). Thus pharmacological interventions addressed to increase eNOS-derived NO production constitute a promising therapeutic approach to prevent myocardial ischemia/reperfusion injury.

  16. Some Considerations on Horizontal Displacement and Horizontal Displacement Coefficient B

    Directory of Open Access Journals (Sweden)

    Tajduś Krzysztof

    2015-12-01

    Full Text Available Mining-induced deformations of the ground surface and within the rock mass may pose danger not only for surface constructions but also for underground objects (e.g., tunnels, underground storages, garages, diverse types of pipelines, electric cables, etc. For a proper evaluation of hazard for surface and underground objects, such parameters as horizontal displacement and horizontal deformations, especially their maximum values, are of crucial importance. The paper is an attempt at a critical review of hitherto accomplished studies and state of the art of predicting horizontal displacement u, in particular the coefficient B, whose value allows determination of the value of maximum displacement if the value of maximum slope is known, or the value of maximum deformation if the value of maximum trough slope is recognized. Since the geodesic observations of fully developed subsidence troughs suggest that the value of the coefficient depends on the depth H, radius of main influences range r and properties of overburden rock, in particular the occurrence of sub-eras Paleogene and Neogene layers (old name: Quaternary and Tertiary with low strength parameters, therefore a formula is provided in the present paper allowing for the estimation of the influence of those factors on the value of coefficient B.

  17. NOAA NOS SOS, EXPERIMENTAL - Currents

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have currents data. *These services are for testing and evaluation use...

  18. NOAA NOS SOS, EXPERIMENTAL - Wind

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have wind data. *These services are for testing and evaluation use only*...

  19. NOAA NOS SOS, EXPERIMENTAL - Salinity

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have salinity data. *These services are for testing and evaluation use...

  20. NOAA NOS SOS, EXPERIMENTAL - Conductivity

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have conductivity data. *These services are for testing and evaluation use...

  1. A percepção da equipe de enfermagem sobre liderança no serviço de urgência e emergência de um hospital geral de Belo Horizonte, MG http://dx.doi.org/10.15601/1983-7631/rt.v4n7p88-98

    Directory of Open Access Journals (Sweden)

    Karla Rona Silva

    2011-10-01

    Full Text Available No serviço de urgência e emergência a liderança é importante para efetividade do trabalho do grupamento de enfermagem, podendo interferir diretamente nas articulações entre os membros da equipe, refletindo na assistência e recuperação do paciente. O Objetivo deste estudo foi avaliar a percepção da equipe de enfermagem sobre liderança no serviço de urgência e emergência, a influência no desenvolvimento do trabalho e, conseqüentemente, as relações interprofissionais. Além disso, pretendeu-se traçar o perfil desses profissionais. Foi utilizada uma abordagem quantitativa e qualitativa, através de questionário, aplicado a 20 técnicos de enfermagem e 4 enfermeiros e  entrevistas com 4 profissionais de cada uma dessas áreas, atuantes na equipe do serviço de atendimento de urgência e emergência de um hospital geral de grande porte, de Belo Horizonte. Observou-se que com relação ao significado do trabalho em equipe 5 (21% entenderam ser um agrupamento de diversos profissionais em determinado local desenvolvendo atividades no mesmo horário e para 19 (79% o trabalho em equipe consiste na união de um grupo de pessoas em torno de um objetivo comum. Os 16 (67% técnicos perceberam o enfermeiro como um líder democrático, contudo afirmaram que não foram preparados para exercer liderança durante sua formação e que essa capacitação acontece com a vivência cotidiana. Concluiu-se que a liderança é fundamental para o desenvolvimento da atividade de trabalho em equipe. Percebeu-se que esses profissionais possuem uma visão crítica da capacidade de liderar e sabem identificar a qual tipo de liderança estão submetidos e como interfere nas articulações do trabalho.Palavras-chave: enfermagem; urgência; emergência; liderança; equipe

  2. Panspermia and horizontal gene transfer

    Science.gov (United States)

    Klyce, Brig

    2009-08-01

    Evidence that extremophiles are hardy and ubiquitous is helping to make panspermia a respectable theory. But even if life on Earth originally came from space, biologists assume that the subsequent evolution of life is still governed by the darwinian paradigm. In this review we show how panspermia could amend darwinism and point to a cosmic source for, not only extremophiles but, all of life. This version of panspermia can be called "strong panspermia." To support this theory we will discuss recent evidence pertaining to horizontal gene transfer, viruses, genes apparently older than the Earthly evolution of the features they encode, and primate-specific genes without identifiable precursors.

  3. El amor que nos hace libres: una aproximacion al horizonte liberador de la moral

    National Research Council Canada - National Science Library

    Gil Espinosa, Maria Isabel

    2011-01-01

    Al reflexionar sobre la vida moral y la vida espiritual se puede correr el riesgo de tratar cada asunto por separado, como si se tratara de dos compartimentos estancos donde nada tiene que ver la una con...

  4. Horizontal gene transfer in chromalveolates

    Directory of Open Access Journals (Sweden)

    Bhattacharya Debashish

    2007-09-01

    Full Text Available Abstract Background Horizontal gene transfer (HGT, the non-genealogical transfer of genetic material between different organisms, is considered a potentially important mechanism of genome evolution in eukaryotes. Using phylogenomic analyses of expressed sequence tag (EST data generated from a clonal cell line of a free living dinoflagellate alga Karenia brevis, we investigated the impact of HGT on genome evolution in unicellular chromalveolate protists. Results We identified 16 proteins that have originated in chromalveolates through ancient HGTs before the divergence of the genera Karenia and Karlodinium and one protein that was derived through a more recent HGT. Detailed analysis of the phylogeny and distribution of identified proteins demonstrates that eight have resulted from independent HGTs in several eukaryotic lineages. Conclusion Recurring intra- and interdomain gene exchange provides an important source of genetic novelty not only in parasitic taxa as previously demonstrated but as we show here, also in free-living protists. Investigating the tempo and mode of evolution of horizontally transferred genes in protists will therefore advance our understanding of mechanisms of adaptation in eukaryotes.

  5. Expression of inducible nitric oxide synthase (iNOS/NOS II) in the vestibule of guinea pigs after the application of cisplatin.

    Science.gov (United States)

    Watanabe, K; Hess, A; Bloch, W; Michel, O

    2000-01-01

    It is well known that the anti-cancer drug cisplatin has an ototoxic property; however, the details are not yet evident. In this study, the expression of inducible nitric oxide synthase (INOS/NOS II) in the vestibule of guinea pigs after i.p. injections of cisplatin was examined immunohistochemically. Three days after the injection of cisplatin (10 mg/kg) or placebo, animals were sacrificed. Then the temporal bones were removed and subjected to Immunohistochemical studies for iNOS. In the cisplatin group, INOS was detectable, whereas the tissue in the control group was negative for iNOS. The vestibule, the wall of blood vessels and the vestibular ganglion cells showed immunoreactivity for iNOS. It is known that INOS catalyzes an inadequate quantity of NO under pathological conditions. Increased NO levels lead to inner ear dysfunction. Therefore, our results indicate that iNOS could also mediate the vestibulo-toxicity of cisplatin.

  6. Horizontal gene transfer in choanoflagellates.

    Science.gov (United States)

    Tucker, Richard P

    2013-01-01

    Horizontal gene transfer (HGT), also known as lateral gene transfer, results in the rapid acquisition of genes from another organism. HGT has long been known to be a driving force in speciation in prokaryotes, and there is evidence for HGT from symbiotic and infectious bacteria to metazoans, as well as from protists to bacteria. Recently, it has become clear that as many as a 1,000 genes in the genome of the choanoflagellate Monosiga brevicollis may have been acquired by HGT. Interestingly, these genes reportedly come from algae, bacteria, and other choanoflagellate prey. Some of these genes appear to have allowed an ancestral choanoflagellate to exploit nutrient-poor environments and were not passed on to metazoan descendents. However, some of these genes are also found in animal genomes, suggesting that HGT into a common ancestor of choanozoans and animals may have contributed to metazoan evolution. Copyright © 2012 Wiley Periodicals, Inc.

  7. Hue geometry and horizontal connections.

    Science.gov (United States)

    Ben-Shahar, Ohad; Zucker, Steven W

    2004-01-01

    Primate visual systems support an elaborate specialization for processing color information. Concentrating on the hue component, we observe that, contrary to Mondrian-like assumptions, hue varies in a smooth manner for ecologically important natural imagery. To represent these smooth variations, and to support those information processing tasks that utilize hue, a piecewise smooth hue field is postulated. The geometry of hue-patch interactions is developed analogously to orientation-patch interactions in texture. The result is a model for long-range (horizontal) interactions in the color domain, the power of which is demonstrated on a number of examples. Implications for computer image processing, computer vision, visual neurophysiology and psychophysics are discussed.

  8. AFLATOXICOSE EM SUÍNOS

    Directory of Open Access Journals (Sweden)

    Luciana Silveira Flôres Schoenau

    1994-01-01

    Full Text Available RESUMO É descrito um surto de aflatoxicose em suínos Duroc de 2 a 6 meses, que consumiam ração contaminada por 519 ppb de aflatoxinas. A morbidade foi de 97%. A mortalidade foi alta, mas não determinada com exatidão. Os sinais clínicos incluíam recusa do alimento, pouco ganho ou perda de peso, diarreia e icterícia. Lesões subagudas e crônicas foram observadas em 4 porcos necropsiados. Nas lesões subagudas o fígado era escuro, com áreas centrolobulares hemorrágicas deprimidas, havia edema da parede da vesícula biliar e bile viscosa. Nos casos crônicos o fígado apresentava-se firme e amarelo-alaranjado. Havia líquido citrino nas cavidades e edema no cólon espiral. Havia avermelhamento da mucosa gástrica da região fúndica. Alterações subagudas eram necrose e hemorragias centrolobulares, hepatomegalocitose, fibrose e hiperplasia ductal. Nos casos crônicos havia fibrose, hiperplasia ductal, megalocitose e degeneração gordurosa hepatocelular. O diagnóstico de aflatoxicose foi feito baseado nos sinais clínicos, nos achados morfológicos e na presença de níveis significativos de aflatoxina na ração dos porcos (B1 = 484,3ppb, B2 = 110,8ppb, G1 = 343,7ppb e G2 = 99,2ppb. Frangos submetidos à mesma alimentação também desenvolveram lesões da toxicose.

  9. O Conselho Municipal de Saneamento de Belo Horizonte: desafios e possibilidades

    Directory of Open Access Journals (Sweden)

    Maíra Crivellari Cardoso Mello

    2014-12-01

    Full Text Available O Conselho Municipal de Saneamento de Belo Horizonte (COMUSA foi criado em abril de 2004. Por ser um conselho municipal de criação recente, principalmente quando comparado a outros conselhos existentes em Belo Horizonte (Conselhos Municipais de Saúde e Meio Ambiente, dentre outros, o COMUSA foi concebido com expectativas de bom funcionamento, já que poderia se pautar nos êxitos desses conselhos mais experientes. No entanto, o COMUSA ainda apresenta algumas fragilidades, principalmente estruturais, que precisam ser sanadas. O presente trabalho tem como objetivo avaliar o funcionamento do COMUSA e o papel exercido por este Conselho no controle social do setor e na definição de políticas públicas na área de saneamento no município de Belo Horizonte.

  10. Gas reservoir evaluation for underbalanced horizontal drilling

    National Research Council Canada - National Science Library

    Li Gao; Meng Ying-Feng; Wei Na; Xu Zhao-Yang; Li Hong-Tao; Xiao Gui-Lin; Zhang Yu-Rui

    2014-01-01

    .... Based on drilling operation parameters, well structure and monitored parameters, the wellbore pressure and the gas reservoir permeability could be predicted theoretically for underbalanced horizontal drilling...

  11. Horizontal vortex single chamber hydroturbine

    Directory of Open Access Journals (Sweden)

    Sergio Antonio Zarate-Orrego

    2016-01-01

    Full Text Available Se evaluó una máquina con alta resistencia de forma para extraer energía de una quebrada, río o corriente marina, y generar electricidad. Sin instrumentos adecuados, la investigación fue cualitativa. Se supuso que si aun así funcionaba, su comportamiento podía mejorar suavizándose la forma. El aparato tiene una tobera semi-convergente de paredes planas, una cámara de vórtice cilíndrica y un rodete. Capta agua por su sección mayor y la descarga tangencialmente por su sección menor en la cámara de vórtice; ésta tiene un orificio en una de sus paredes laterales. Así forma un vórtice horizontal que hace girar un rodete cuyo eje acciona un generador eléctrico. El trabajo experimental realizado mostró que sí es posible producir energía eléctrica con este dispositivo pese a las condiciones adversas en que se ensayó.

  12. Horizontal cooperation in logistics : Opportunities and impediments

    NARCIS (Netherlands)

    Cruijssen, Frans; Cools, Martine; Dullaert, Wout

    This paper presents the results of a large-scale survey on the potential benefits of and impediments for horizontal cooperation in Flanders. The main findings are that in general Logistics Service Providers strongly believe in the potential benefits of horizontal cooperation to increase their

  13. Rectifying Horizontal Inequalities: Lessons from African Conflict ...

    African Journals Online (AJOL)

    One of the most prevalent and underrepresented root causes of conflict in Africa and worldwide is that of horizontal inequalities. In that light, the goal of this paper is to provide practical solutions for the long-term resolution of conflict by addressing one of its root causes, that of horizontal inequalities. Reference will be made ...

  14. Rectifying Horizontal Inequalities: Lessons from African Conflict

    African Journals Online (AJOL)

    and horizontal (between groups) inequalities. A number of scholars have addressed the question of inequalities. Frances Stewart, for example, deals with the problem of horizontal inequalities in a number of papers.2 Stewart. (2002:3) argues that 'unequal access to political/economic/social resources. 1 The social contract ...

  15. Do infants have the horizontal bias?

    NARCIS (Netherlands)

    van Renswoude, D.R.; Johnson, S.P.; Raijmakers, M.E.J.; Visser, I.

    2016-01-01

    A robust set of studies show that adults make more horizontal than vertical and oblique saccades, while scanning real-world scenes. In this paper we study the horizontal bias in infants. The directions of eye movements were calculated for 41 infants (M = 8.40 months, SD = 3.74, range = 3.48–15.47)

  16. The Process of Horizontal Differentiation: Two Models.

    Science.gov (United States)

    Daft, Richard L.; Bradshaw, Patricia J.

    1980-01-01

    Explores the process of horizontal differentiation by examining events leading to the establishment of 30 new departments in five universities. Two types of horizontal differentiation processes--administrative and academic--were observed and each was associated with different organizational conditions. (Author/IRT)

  17. Horizontal gene transfer in human pathogens.

    Science.gov (United States)

    Juhas, Mario

    2015-02-01

    Horizontal gene transfer has a tremendous impact on the genome plasticity, adaptation and evolution of bacteria. Horizontally transferred mobile genetic elements are involved in the dissemination of antibiotic resistance and virulence genes, thus contributing to the emergence of novel "superbugs". This review provides update on various mechanisms of horizontal gene transfer and examines how horizontal gene transfer contributes to the evolution of pathogenic bacteria. Special focus is paid to the role horizontal gene transfer plays in pathogenicity of the emerging human pathogens: hypervirulent Clostridium difficile and Escherichia coli (including the most recent haemolytic uraemic syndrome outbreak strain) and methicillin-resistant Staphylococcus aureus (MRSA), which have been associated with largest outbreaks of infection recently.

  18. Ambiente alimentar e consumo de frutas, legumes e verduras em adultos de Belo Horizonte - MG

    OpenAIRE

    Milene Cristine Pessoa

    2013-01-01

    Fatores ambientais. sociais e individuais influenciam padrões alimentares e podem estar associados à ocorrência de DCNT. O consumo de frutas. legumes e verduras (FLV) está entre os padrões alimentares relacionados à prevenção de doenças crônicas não transmissíveis DCNT. As pessoas com rendimentos mais elevados e maior nível educacional tendem a consumir mais frutas. legumes e verduras (FLV) do que aqueles que são menos abastados e menos escolarizados. Além disso, estudos recentes publicados s...

  19. Factors associated to antidepressant prescription for civil servants of Belo Horizonte, MG

    Directory of Open Access Journals (Sweden)

    Renato Lopes Hurtado

    2010-06-01

    Full Text Available Selecting the most suitable drug for the treatment of depression has clinical and economic implications, since both safety and cost of antidepressants (AD vary among therapeutic subgroups. This study aimed to evaluate the prescription of antidepressants for users of the pharmacy for civil servants of PBH (FARMASERV in 2005. Univariate, bivariate and multivariate analyzes using logistic regression were performed. Of the total prescriptions analyzed (652, the majority were for women (81.7% and individuals aged between 19 and 59 years (81.7%. The variables independently associated with the selection of AD were gender, age and the specialty of the prescriber. Women and young adults were more likely to be prescribed an SSRI compared to their congeners, with statistically significant differences. Psychiatrists were more likely to prescribe an SSRI than neurologists or general physicians. The determinant factors for selecting antidepressants may aid the planning of interventions aimed at patients and prescribers which can enable rationalization of the use of antidepressants.A seleção adequada do medicamento para o tratamento da depressão tem implicações clínicas e econômicas, visto que a segurança e o custo dos antidepressivos (AD variam entre as subclasses terapêuticas. Esse estudo avaliou prescrições de AD dispensadas em 2005 para usuários da Farmácia da Clínica dos Servidores da PBH (FARMASERV. Foram realizadas análises univariada, bivariada e multivariada dos dados, utilizando-se regressão logística. Do total de prescrições (652, a maioria era para mulheres (81,7% e para indivíduos com idade entre 19 e 59 anos (81,7%. As variáveis independentemente associadas à seleção de AD foram gênero, faixa etária e especialidade do prescritor. Mulheres e adultos jovens têm maior chance de receber prescrição de ISRS, em comparação aos seus congêneres, sendo as diferenças estatisticamente significativas. A chance dos psiquiatras prescreverem ISRS é maior do que neurologistas e clínicos gerais. Os fatores determinantes da seleção do antidepressivo podem subsidiar o planejamento de intervenções dirigidas aos pacientes e prescritores de forma a permitir a racionalização de sua utilização.

  20. Surto de larva migrans cutnea em uma creche de belo horizonte, minas gerais (Brasil Outbreak of cutaneous Larva migrans in a private nursery in Belo Horizonte, Brazil

    Directory of Open Access Journals (Sweden)

    Walter Dos Santos Lima

    1984-04-01

    Full Text Available O presente trabalho relata a ocorrência de um surto de Larva migrans cutânea, em 17 crianças de uma creche em Belo Horizonte, MG. As crianças adquiriram esta dermatose quando brincavam em uma caixa de areia contaminada com larvas infectantes de ancilostomídeos de cão.An outbreak of cutaneous Larva migrans in six months to four years old children in a private nursery in Belo Horizonte, Brazil, is reported. The source of infection was a sand box contaminated with dog faeces.

  1. A epilepsia nos tumores cerebrais

    Directory of Open Access Journals (Sweden)

    Luís Marques-Assis

    1969-03-01

    Full Text Available De 411 casos de tumores cerebrais foram estudados 86 (19,4% que apresentaram manifestações epilépticas. A epilepsia foi estudada quanto à duração, ao tipo de manifestação e à severidade, em relação à natureza e à localização dos tumores cerebrais. A análise dos resultados permitiu aos autores chegarem às seguintes conclusões: 1 a epilepsia incidiu em 19,4% dos casos; 2 o oligodendroglioma, as metástases carcinomatosas e o glioblastoma multiforme foram, pela ordem, os tumores mais epileptogênicos; 3 as áreas frontal, parietal e temporal foram, nessa ordem, as localizações mais epileptogênicas; 4 os carcinomas metastáticos predominaram nos casos com epilepsia com menos de um ano de evolução, enquanto que os astrocitomas predominaram nos casos com mais de três anos; quanto à topografia, predominou a região frontal no primeiro grupo e a temporal, no segundo; 5 nas formas mais severas de epilepsia predominaram os oligodendrogliomas e os meningeomas, quanto à natureza, e a região frontotemporal e a foice, quanto à localização; 6 os craniofaringeomas e os meduloblastomas foram os tumores que mais freqüentemente determinaram o aparecimento de convulsões puras; nesses casos, a sela túrsica e a fossa posterior foram as sedes mais freqüentes; 7 os carcinomas metastáticos e os meningeomas, quanto à natureza, e as regiões frontoparietal e parietal, quanto à localização, foram os mais freqüentemente encontrados nos casos com crises de tipo bravais-jacksoniano.

  2. O luto profissional nos enfermeiros

    OpenAIRE

    Gama, Maria Georgeana Marques da

    2014-01-01

    O crescente contacto do enfermeiro com a morte em contexto profissional tem sido muitas vezes perspectivado num sentido negativo pelas dificuldades emocionais que desencadeia e pelas consequências de sobrecarga nos profissionais de saúde, conducentes a processos de evitamento relacional e de isolamento social e profissional. A exposição diária à morte e ao processo de morrer, para além da sobrecarga de luto, pode constituir-se num desafio ao crescimento pessoal e profissional dos enfermeiros....

  3. Surto de larva migrans cutnea em uma creche de belo horizonte, minas gerais (Brasil

    Directory of Open Access Journals (Sweden)

    Walter Dos Santos Lima

    1984-04-01

    Full Text Available O presente trabalho relata a ocorrência de um surto de Larva migrans cutânea, em 17 crianças de uma creche em Belo Horizonte, MG. As crianças adquiriram esta dermatose quando brincavam em uma caixa de areia contaminada com larvas infectantes de ancilostomídeos de cão.

  4. Movimentos de Contracultura em Belo Horizonte * Movements of counterculture in Belo Horizonte (one of Brazil’s States

    Directory of Open Access Journals (Sweden)

    CARLA FERRETI SANTIAGO

    2012-05-01

    Full Text Available Este artigo propõe a análise dos movimentos de contracultura em Belo Horizonte, entre os anos de 1968 e 1978, a partir de reportagens do jornal Diário da Tarde. A contracultura, movimento de proporções mundiais, surgida entre as décadas de 1950 e 1960, na Europa – notadamente França, Alemanha e Inglaterra – e nos Estados Unidos, foi difundida pelo mundo, especialmente após a “revolução cultural” de maio de 1968, em Paris. No Brasil, ficou conhecida principalmente através do movimento Tropicália, que englobava diversos âmbitos artísticos em um mesmo grupo. Em Belo Horizonte, especificamente, as análises dos periódicos possibilitaram a descoberta e subdivisão de movimentos contraculturais artísticos, “anti-artísticos” e aqueles considerados “ameaças” à sociedade. Palavras-chave: Movimentos contraculturais – História Cultural – Diário da Tarde.  Abstract: This article proposes the analysis of the movements of counterculture in Belo Horizonte between 1968 and 1978, starting from the reports of the newspaper “Diário da Tarde”. The counterculture, movement of world proportions, started between 1950 and 1960, between Europe – in particular France, Germany and England – and the United States o America, was spread throughout the world, especially after the “cultural revolution” of May 1968, in Paris. In Brazil, it became known especially through the “Tropicália” movement, which encompassed several artistic fields in a same group. In Belo Horizonte, especially, the analyses from the periodicals enabled the discovery and subdivision of artistic counterculture movements, “anti-art” and those deemed “threats” to society. Keywords: Counterculture Movements – Cultural History – Newspaper “Diário da Tarde”.  

  5. Recompletion by horizontal drilling pays off

    Energy Technology Data Exchange (ETDEWEB)

    Holifield, R.H.; Rehm, B.

    1989-03-01

    More than 20 wells have been recompleted in the Giddings field by drilling a new, horizontal interval from existing 5 1/2-in. cased wells for distances of 300 to 1,250 ft. Recompleting existing wells is much cheaper than drilling a new well. Plus, the new completions, overall, produce better. The horizontal wells are routinely profitable now, and pay out occurs in 3 to 24 months. During this program, the techniques for slim-hole- medium-radius, horizontal drilling in Giddings have been mastered and costs have dropped 75%. It is believed that this program may be the first (or among the first) continuing horizontal project drilled out of cased wells with repeatable profitability as opposed to projected viability.

  6. Productivity and injectivity of horizontal wells

    Energy Technology Data Exchange (ETDEWEB)

    Aziz, Khalid

    2000-03-06

    One of the key issues addressed was pressure drop in long horizontal wells and its influence on well performance. Very little information is available in the literature on flow in pipes with influx through pipe walls. Virtually all of this work has been in small diameter pipes and with single-phase flow. In order to address this problem new experimental data on flow in horizontal and near horizontal wells have been obtained. Experiments were conducted at an industrial facility on typical 6 1/8 ID, 100 feet long horizontal well model. The new data along with available information in the literature have been used to develop new correlations and mechanistic models. Thus it is now possible to predict, within reasonable accuracy, the effect of influx through the well on pressure drop in the well.

  7. Horizontal Compilations of Nuclear Data III

    Science.gov (United States)

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

    2001-11-01

    Compilations of resonance parameters for all nuclei (horizontal-type compilations) derived from study of reactions with neutrons and charge particles are described. Systematic trends in experimental data due to the differences in energy scales of spectrometers were found after comparison of data for many nuclei. The combination of data from horizontal-type compilations with data from the well-known file ENSDF expands the usefulness of these data files.

  8. Horizontal Brand Extension and Customer perception

    OpenAIRE

    Khan, Khalid; Janthimapornkij, Rattanawilai

    2011-01-01

    Company use different method for extended their business to different market and to different segment. They use different method; brand extension is one of popular strategy for extension of business. Brand extension does not become successful for every brand, it is very risky. The purpose of this thesis is to study horizontal brand extension and customer perception. We will discuss horizontal brand extension and its two main types franchise brand extension and line extension. Brand extension ...

  9. Do infants have the horizontal bias?

    Science.gov (United States)

    Van Renswoude, D R; Johnson, S P; Raijmakers, M E J; Visser, I

    2016-08-01

    A robust set of studies show that adults make more horizontal than vertical and oblique saccades, while scanning real-world scenes. In this paper we study the horizontal bias in infants. The directions of eye movements were calculated for 41 infants (M=8.40 months, SD=3.74, range=3.48-15.47) and 47 adults (M=21.74 years, SD=4.54, range=17.89-39.84) while viewing 28 real-world scenes. Saccade directions were binned to study the proportion of saccades in the horizontal, vertical and oblique directions. In addition, saccade directions were also modeled using a mixture of Von Mises distributions, to account for the relatively large amount of variance in infants data. Horizontal bias was replicated in adults and also found in infants, using both the binning and Von Mises approach. Moreover, a developmental pattern was observed in which older infants are more precise in targeting their saccades than younger infants. That infants have a horizontal bias is important in understanding infants' eye movements. Future studies should account for the horizontal bias in their designs and analyses. Copyright © 2016 Elsevier Inc. All rights reserved.

  10. Uncoupling of eNOS contributes to redox-sensitive leukocyte recruitment and microvascular leakage elicited by methylglyoxal.

    Science.gov (United States)

    Su, Yang; Qadri, Syed M; Hossain, Mokarram; Wu, Lingyun; Liu, Lixin

    2013-12-15

    Elevated levels of the glycolysis metabolite methylglyoxal (MG) have been implicated in impaired leukocyte-endothelial interactions and vascular complications in diabetes, putative mechanisms of which remain elusive. Uncoupling of endothelial nitric oxide synthase (eNOS) was shown to be involved in endothelial dysfunction in diabetes. Whether MG contributes to these effects has not been elucidated. By using intravital microscopy in vivo, we demonstrate that MG-triggered reduction in leukocyte rolling velocity and increases in rolling flux, adhesion, emigration and microvascular permeability were significantly abated by scavenging reactive oxygen species (ROS). In murine cremaster muscle, MG treatment reduced tetrahydrobiopterin (BH4)/total biopterin ratio, increased arginase expression and stimulated ROS and superoxide production. The latter was significantly blunted by ROS scavengers Tempol (300μM) or MnTBAP (300μM), by BH4 supplementation (100μM) or by NOS inhibitor N(G)-nitro-L-arginine methyl ester (L-NAME; 20μM). In these tissues and cultured murine and human primary endothelial cells, MG increased eNOS monomerization and decreased BH4/total biopterin ratio, effects that were significantly mitigated by supplementation of BH4 or its precursor sepiapterin but not by L-NAME or tetrahydroneopterin, indicative of MG-triggered eNOS uncoupling. MG treatment further decreased the expression of guanosine triphosphate cyclohydrolase I in murine primary endothelial cells. MG-induced leukocyte recruitment was significantly attenuated by supplementation of BH4 or sepiapterin or suppression of superoxide by L-NAME confirming the role of eNOS uncoupling in MG-elicited leukocyte recruitment. Together, our study uncovers eNOS uncoupling as a pivotal mechanism in MG-induced oxidative stress, microvascular hyperpermeability and leukocyte recruitment in vivo. Copyright © 2013 Elsevier Inc. All rights reserved.

  11. Asiatic Acid Alleviates Hemodynamic and Metabolic Alterations via Restoring eNOS/iNOS Expression, Oxidative Stress, and Inflammation in Diet-Induced Metabolic Syndrome Rats

    Directory of Open Access Journals (Sweden)

    Poungrat Pakdeechote

    2014-01-01

    Full Text Available Asiatic acid is a triterpenoid isolated from Centella asiatica. The present study aimed to investigate whether asiatic acid could lessen the metabolic, cardiovascular complications in rats with metabolic syndrome (MS induced by a high-carbohydrate, high-fat (HCHF diet. Male Sprague-Dawley rats were fed with HCHF diet with 15% fructose in drinking water for 12 weeks to induce MS. MS rats were treated with asiatic acid (10 or 20 mg/kg/day or vehicle for a further three weeks. MS rats had an impairment of oral glucose tolerance, increases in fasting blood glucose, serum insulin, total cholesterol, triglycerides, mean arterial blood pressure, heart rate, and hindlimb vascular resistance; these were related to the augmentation of vascular superoxide anion production, plasma malondialdehyde and tumor necrosis factor-alpha (TNF-α levels (p < 0.05. Plasma nitrate and nitrite (NOx were markedly high with upregulation of inducible nitric oxide synthase (iNOS expression, but dowregulation of endothelial nitric oxide synthase (eNOS expression (p < 0.05. Asiatic acid significantly improved insulin sensitivity, lipid profiles, hemodynamic parameters, oxidative stress markers, plasma TNF-α, NOx, and recovered abnormality of eNOS/iNOS expressions in MS rats (p < 0.05. In conclusion, asiatic acid improved metabolic, hemodynamic abnormalities in MS rats that could be associated with its antioxidant, anti-inflammatory effects and recovering regulation of eNOS/iNOS expression.

  12. Horizontal alveolar bone loss: A periodontal orphan

    Science.gov (United States)

    Jayakumar, A.; Rohini, S.; Naveen, A.; Haritha, A.; Reddy, Krishnanjeneya

    2010-01-01

    Background: Attempts to successfully regenerate lost alveolar bone have always been a clinician’s dream. Angular defects, at least, have a fairer chance, but the same cannot be said about horizontal bone loss. The purpose of the present study was to evaluate the prevalence of horizontal alveolar bone loss and vertical bone defects in periodontal patients; and later, to correlate it with the treatment modalities available in the literature for horizontal and vertical bone defects. Materials and Methods: The study was conducted in two parts. Part I was the radiographic evaluation of 150 orthopantomographs (OPGs) (of patients diagnosed with chronic periodontitis and seeking periodontal care), which were digitized and read using the AutoCAD 2006 software. All the periodontitis-affected teeth were categorized as teeth with vertical defects (if the defect angle was ≤45° and defect depth was ≥3 mm) or as having horizontal bone loss. Part II of the study comprised search of the literature on treatment modalities for horizontal and vertical bone loss in four selected periodontal journals. Results: Out of the 150 OPGs studied, 54 (36%) OPGs showed one or more vertical defects. Totally, 3,371 teeth were studied, out of which horizontal bone loss was found in 3,107 (92.2%) teeth, and vertical defects were found only in 264 (7.8%) of the teeth, which was statistically significant (P<.001). Search of the selected journals revealed 477 papers have addressed the treatment modalities for vertical and horizontal types of bone loss specifically. Out of the 477 papers, 461 (96.3%) have addressed vertical bone loss, and 18 (3.7%) have addressed treatment options for horizontal bone loss. Two papers have addressed both types of bone loss and are included in both categories. Conclusion: Horizontal bone loss is more prevalent than vertical bone loss but has been sidelined by researchers as very few papers have been published on the subject of regenerative treatment modalities for

  13. Horizontes éticos : o cuidado como possibilidade de ser-no-mundo

    OpenAIRE

    Mello, Luciana Soares de

    2013-01-01

    A presente dissertação, Horizontes éticos: o cuidado como possibilidade de ser-no-mundo, tem o objetivo de refletir e estabelecer exemplificações sobre a noção de cuidado em Heidegger. O cuidado a ser interpretado parte de uma perspectiva da analítica existencial nos níveis, ôntico e ontológico, procurando construir horizontes éticos, através do método hermenêutico. A interpretação do cuidado tem como base teórica as obras de Heidegger: Ser e tempo e Carta sobre o humanismo. Re...

  14. Horizontal bone augmentation: the decision tree.

    Science.gov (United States)

    Fu, Jia-Hui; Wang, Hom-Lay

    2011-01-01

    The emergence of implant dentistry has led to the need for bone augmentation procedures. With the removal of a tooth, there is an inevitable three-dimensional (3D) loss of alveolar bone. More often than not, horizontal bone loss occurs at a faster rate and to a greater extent compared to vertical bone loss. This led to the development of several horizontal bone augmentation techniques, such as guided bone regeneration, ridge expansion, distraction osteogenesis, and block grafts. These proposed augmentation techniques aim to place the implant in an ideal 3D position for successful restorative therapy. The literature has shown that horizontal bone augmentation is fairly predictable if certain criteria are fulfilled. However, with numerous techniques and materials currently available, it is difficult to choose the most suitable treatment modality. A search of the literature available was conducted to validate the decision-making process when planning for a horizontal ridge augmentation procedure. The decision tree proposed in this paper stems from the 3D buccolingual bone width available at the site of implant placement (⋝ 3.5 mm, factors such as the tissue thickness, the arch position, and the availability of autogenous bone. The decision tree provides insight on how clinicians can choose the most appropriate and predictable horizontal ridge augmentation procedure to minimize unnecessary complications.

  15. Realidad e interés. El horizonte de la filosofía kantiana

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    Jacinto null

    2005-01-01

    Full Text Available Se delinea el horizonte de la filosofía kantiana y su modo de pensar tomando como hilo conductor los intereses racionales y los diversos tipos de realidad que ellos nos hacen comprender. El interés teórico sólo llega a lo fenoménico e instrumental, a lo cósico. Es el interés de la razón práctica el que llega más lejos, hasta la realidad en sí, dibujando el ámbito supremo de realidad y de posibilidad en el modo de ser de la acción, del deber, pero también el de la esperanza. Por último, el interés desinteresado de lo estético nos abre al modo de ser de lo singular y de lo simbólico

  16. MGE-derived nNOS+interneurons promote fear acquisition in nNOS-/-mice.

    Science.gov (United States)

    Zhang, Lin; Yuan, Hong-Jin; Cao, Bo; Kong, Cheng-Cheng; Yuan, Fang; Li, Jun; Ni, Huan-Yu; Wu, Hai-Yin; Chang, Lei; Liu, Yan; Luo, Chun-Xia

    2017-12-02

    Neuronal nitric oxide synthase (nNOS) 1 , mainly responsible for NO release in central nervous system (CNS) 2 , plays a significant role in multiple physiological functions. However, the function of nNOS + interneurons in fear learning has not been much explored. Here we focused on the medial ganglionic eminences (MGE) 3 -derived nNOS + interneurons in fear learning. To determine the origin of nNOS + interneurons, we cultured neurons in vitro from MGE, cortex, lateral ganglionic eminence (LGE) 4 , caudal ganglionic eminences (CGE) 5 and preoptic area (POA) 6 . The results showed that MGE contained the most abundant precursors of nNOS + interneurons. Moreover, donor cells from E12.5 embryos demonstrated the highest positive rate of nNOS + interneurons compared with other embryonic periods (E11.5, E12, E13, E13.5 and E14). Additionally, these cells from E12.5 embryos showed long axonal and abundant dendritic arbors after 10 days culture, indicating the capability to disperse and integrate in host neural circuits after transplantation. To investigate the role of MGE-derived nNOS + interneurons in fear learning, donor MGE cells were transplanted into dentate gyrus (DG) 7 of nNOS knock-out (nNOS -/- ) or wild-type mice. Results showed that the transplantation of MGE cells promoted the acquisition of nNOS -/- but not the wild-type mice, suggesting the importance of nNOS + neurons in fear acquisition. Moreover, we transplanted MGE cells from nNOS -/- mice or wild-type mice into DG of the nNOS -/- mice and found that only MGE cells from wild-type mice but not the nNOS -/- mice rescued the deficit in acquisition of the nNOS -/- mice, further confirming the positive role of nNOS + neurons in fear learning. Copyright © 2017 Elsevier Inc. All rights reserved.

  17. iNOS-dependent increase in colonic mucus thickness in DSS-colitic rats.

    Directory of Open Access Journals (Sweden)

    Olof Schreiber

    Full Text Available AIM: To investigate colonic mucus thickness in vivo in health and during experimental inflammatory bowel disease. METHODS: Colitis was induced with 5% DSS in drinking water for 8 days prior to experiment, when the descending colonic mucosa of anesthetized rats was studied using intravital microscopy. Mucus thickness was measured with micropipettes attached to a micromanipulator. To assess the contributions of NOS and prostaglandins in the regulation of colonic mucus thickness, the non-selective NOS-inhibitor L-NNA (10 mg/kg bolus followed by 3 mg/kg/h, the selective iNOS-inhibitor L-NIL (10 mg/kg bolus followed by 3 mg/kg/h and the non-selective COX-inhibitor diclofenac (5 mg/kg were administered intravenously prior to experiment. To further investigate the role of iNOS in the regulation of colonic mucus thickness, iNOS -/- mice were used. RESULTS: Colitic rats had a thicker firmly adherent mucus layer following 8 days of DSS treatment than untreated rats (88±2 µm vs 76±1 µm. During induction of colitis, the thickness of the colonic mucus layer initially decreased but was from day 3 significantly thicker than in untreated rats. Diclofenac reduced the mucus thickness similarly in colitic and untreated rats (-16±5 µm vs -14±2 µm. While L-NNA had no effect on colonic mucus thickness in DSS or untreated controls (+3±2 µm vs +3±1 µm, L-NIL reduced the mucus thickness significantly more in colitic rats than in controls (-33±4 µm vs -10±3 µm. The importance of iNOS in regulating the colonic mucus thickness was confirmed in iNOS-/- mice, which had thinner colonic mucus than wild-type mice (35±3 µm vs 50±2 µm, respectively. Furthermore, immunohistochemistry revealed increased levels of iNOS in the colonic surface epithelium following DSS treatment. CONCLUSION: Both prostaglandins and nitric oxide regulate basal colonic mucus thickness. During onset of colitis, the thickness of the mucus layer is initially reduced followed by an iNOS

  18. Relative contributions of NOS isoforms during experimental colitis: endothelial-derived NOS maintains mucosal integrity

    NARCIS (Netherlands)

    Vallance, Bruce A.; Dijkstra, Gerard; Qiu, Bosheng; van der Waaij, Laurens A.; van Goor, Harry; Jansen, Peter L. M.; Mashimo, Hiroshi; Collins, Stephen M.

    2004-01-01

    The role of nitric oxide (NO) in inflammatory bowel diseases has traditionally focused on the inducible form of NO synthase (iNOS). However, the constitutive endothelial (eNOS) and neuronal (nNOS) isoforms may also impact on colitis, either by contributing to the inflammation or by regulating

  19. Neuronal NOS localises to human airway cilia.

    Science.gov (United States)

    Jackson, Claire L; Lucas, Jane S; Walker, Woolf T; Owen, Holly; Premadeva, Irnthu; Lackie, Peter M

    2015-01-30

    Airway NO synthase (NOS) isoenzymes are responsible for rapid and localised nitric oxide (NO) production and are expressed in airway epithelium. We sought to determine the localisation of neuronal NOS (nNOS) in airway epithelium due to the paucity of evidence. Sections of healthy human bronchial tissue in glycol methacrylate resin and human nasal polyps in paraffin wax were immunohistochemically labelled and reproducibly demonstrated nNOS immunoreactivity, particularly at the proximal portion of cilia; this immunoreactivity was blocked by a specific nNOS peptide fragment. Healthy human epithelial cells differentiated at an air-liquid interface (ALI) confirmed the presence of all three NOS isoenzymes by immunofluorescence labelling. Only nNOS immunoreactivity was specific to the ciliary axonemeand co-localised with the cilia marker β-tubulin in the proximal part of the ciliary axoneme. We report a novel localisation of nNOS at the proximal portion of cilia in airway epithelium and conclude that its independent and local regulation of NO levels is crucial for normal cilia function. Copyright © 2014 Elsevier Inc. All rights reserved.

  20. Gallic Acid Enriched Fraction of Phyllanthus emblica Potentiates Indomethacin-Induced Gastric Ulcer Healing via e-NOS-Dependent Pathway

    Directory of Open Access Journals (Sweden)

    Ananya Chatterjee

    2012-01-01

    Full Text Available The healing activity of gallic acid enriched ethanolic extract (GAE of Phyllanthus emblica fruits (amla against the indomethacin-induced gastric ulceration in mice was investigated. The activity was correlated with the ability of GAE to alter the cyclooxygenase- (COX- dependent healing pathways. Histology of the stomach tissues revealed maximum ulceration on the 3rd day after indomethacin (18 mg/kg, single dose administration that was associated with significant increase in inflammatory factors, namely, mucosal myeloperoxidase (MPO activity and inducible nitric oxide synthase (i-NOS expression. Proangiogenic parameters such as the levels of prostaglandin (PG E2, vascular endothelial growth factor (VEGF, hepatocyte growth factor (HGF, von Willebrand Factor VIII, and endothelial NOS (e-NOS were downregulated by indomethacin. Treatment with GAE (5 mg/kg/day and omeprazole (3 mg/kg/day for 3 days led to effective healing of the acute ulceration, while GAE could reverse the indomethacin-induced proinflammatory changes of the designated biochemical parameters. The ulcer healing activity of GAE was, however, compromised by coadministration of the nonspecific NOS inhibitor, N-nitro-L-arginine methyl ester (L-NAME, but not the i-NOS-specific inhibitor, L-N6-(1-iminoethyl lysine hydrochloride (L-NIL. Taken together, these results suggested that the GAE treatment accelerates ulcer healing by inducing PGE2 synthesis and augmenting e-NOS/i-NOS ratio.

  1. Gallic Acid Enriched Fraction of Phyllanthus emblica Potentiates Indomethacin-Induced Gastric Ulcer Healing via e-NOS-Dependent Pathway

    Science.gov (United States)

    Chatterjee, Ananya; Chatterjee, Sirshendu; Biswas, Angshuman; Bhattacharya, Sayanti; Chattopadhyay, Subrata; Bandyopadhyay, Sandip K.

    2012-01-01

    The healing activity of gallic acid enriched ethanolic extract (GAE) of Phyllanthus emblica fruits (amla) against the indomethacin-induced gastric ulceration in mice was investigated. The activity was correlated with the ability of GAE to alter the cyclooxygenase- (COX-) dependent healing pathways. Histology of the stomach tissues revealed maximum ulceration on the 3rd day after indomethacin (18 mg/kg, single dose) administration that was associated with significant increase in inflammatory factors, namely, mucosal myeloperoxidase (MPO) activity and inducible nitric oxide synthase (i-NOS) expression. Proangiogenic parameters such as the levels of prostaglandin (PG) E2, vascular endothelial growth factor (VEGF), hepatocyte growth factor (HGF), von Willebrand Factor VIII, and endothelial NOS (e-NOS) were downregulated by indomethacin. Treatment with GAE (5 mg/kg/day) and omeprazole (3 mg/kg/day) for 3 days led to effective healing of the acute ulceration, while GAE could reverse the indomethacin-induced proinflammatory changes of the designated biochemical parameters. The ulcer healing activity of GAE was, however, compromised by coadministration of the nonspecific NOS inhibitor, N-nitro-L-arginine methyl ester (L-NAME), but not the i-NOS-specific inhibitor, L-N6-(1-iminoethyl) lysine hydrochloride (L-NIL). Taken together, these results suggested that the GAE treatment accelerates ulcer healing by inducing PGE2 synthesis and augmenting e-NOS/i-NOS ratio. PMID:22966242

  2. HORIZONTAL WELL DRILL-IN FLUIDS

    Directory of Open Access Journals (Sweden)

    Nediljka Gaurina-Međimurec

    1998-12-01

    Full Text Available Main objective of horizontal driling is to place a drain-hole for a long distance within the pay zone to enhance productivity or injectivity. In drilling horizontal wells, more serious problems appear than in drilling vertical wells. These problems are: poor hole cleaning, excessive torque and drag, hole filling, pipe stucking, wellbore instability, loss of circulation, formation damage, poor cement job, and difficulties at logging jobs. From that reason, successful drilling and production of horizontal well depends largely on the fluid used during drilling and completion phases. Several new fluids, that fulfill some or all of required properties (hole cleaning, cutting suspension, good lubrication, and relative low formation damage, are presented in this paper.

  3. Horizontal bridges in polar dielectric liquids

    Energy Technology Data Exchange (ETDEWEB)

    Woisetschlaeger, Jakob [Graz University of Technology, Experimental Turbomachinery Research and Optical Measurement Group, Institute for Thermal Turbomachinery and Machine Dynamics, Graz (Austria); Wexler, Adam D.; Fuchs, Elmar C. [Wetsus, Center of Excellence for Sustainable Water Technology, Leeuwarden (Netherlands); Holler, Gert [Graz University of Technology, Institute of Electrical Measurement and Measurement Signal Processing, Graz (Austria); Eisenhut, Mathias [Graz University of Technology, Institute of Analytical Chemistry and Food Chemistry, Graz (Austria); Gatterer, Karl [Graz University of Technology, Institute of Physical and Theoretical Chemistry, Graz (Austria)

    2012-01-15

    When a high-voltage direct-current is applied to two beakers filled with polar liquid dielectrica like water or methanol, a horizontal bridge forms between the two beakers. By repeating a version of Pellat's experiment, it is shown that a horizontal bridge is stable by the action of electrohydrodynamic pressure. Thus, the static and dynamic properties of the phenomenon called a 'floating water bridge' can be explained by the gradient of Maxwell pressure, replenishing the liquid within the bridge against any drainage mechanism. It is also shown that a number of liquids can form stable and long horizontal bridges. The stability of such a connection, and the asymmetry in mass flow through such bridges caused by the formation of ion clouds in the vicinity of the electrodes, is also discussed by two further experiments. (orig.)

  4. Fourth international seminar on horizontal steam generators

    Energy Technology Data Exchange (ETDEWEB)

    Tuomisto, H. [ed.] [IVO Group, Vantaa (Finland); Purhonen, H. [ed.] [VTT, Espoo (Finland); Kouhia, V. [ed.] [Lappeenranta Univ. of Technology (Finland)

    1997-12-31

    The general objective of the International Seminars of Horizontal Steam Generator Modelling has been the improvement in understanding of realistic thermal hydraulic behaviour of the generators when performing safety analyses for VVER reactors. The main topics presented in the fourth seminar were: thermal hydraulic experiments and analyses, primary collector integrity, feedwater distributor replacement, management of primary-to-secondary leakage accidents and new developments in the VVER safety technology. The number of participants, representing designers and manufacturers of the horizontal steam generators, plant operators, engineering companies, research organizations, universities and regulatory authorities, was 70 from 10 countries.

  5. [The action of PI3K/AKT during genistein promoting the activity of eNOS].

    Science.gov (United States)

    Zheng, Feng-li; Zhao, Jia-hui; Zhang, Hua-ping

    2012-04-01

    Genistein could inhibit the development of atherosclerosis. This study explored the role of PI3K/AKT signaling during genistein promoted eNOS activation. Human umbilical vein endothelial cells (HUVECs) were incubated with ox-LDL (100 mg/L), then treated with genistein (100 nmol/L) for 5, 10, 15, 30 and 60 min. The production of NO was assessed by Griess reaction in cell culture supernatant. The mRNA expression of endothelial nitric oxide synthase (eNOS) was detected by reverse transcription-polymerase chain reaction (RT-PCR). The protein expression of eNOS and phosphorylation eNOS(Ser(1179)) were determined by Western blot. The effect of genistein on phosphorylation eNOS(Ser(1179)) level was also observed in the presence of LY294002 or NSC154020 (PI3K and AKT inhibitors). The concentration of NO and the expression level of phosphorylation eNOS(Ser(1179)) were significantly increased in ox-LDL + genistein treated cells than ox-LDL treated cells (all P 0.05). Furthermore, the expression level of phosphorylation eNOS(Ser(1179)) was significantly lower in PIK3/AKT inhibitors LY294002 and NSC154020 treated cells compared with ox-LDL + genistein treated cells (all P Genistein could promote the activity of eNOS through increasing phosphorylation eNOS(Ser(1179)) level through PI3K/AKT pathway.

  6. Flow mapping for ESS horizontal target

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, Y.; Kikura, H.; Taishi, T. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    1997-09-01

    Flow behaviour for ESS horizontal target is studied experimentally using two dimensional water model. A velocity field of stationary flow in reaction zone has been obtained. Three dimensional effect was also studied as a spanwise flow structure. (author) 3 figs., 3 refs.

  7. Horizontal transfer of a plant transposon.

    Directory of Open Access Journals (Sweden)

    Xianmin Diao

    2006-01-01

    Full Text Available The majority of well-documented cases of horizontal transfer between higher eukaryotes involve the movement of transposable elements between animals. Surprisingly, although plant genomes often contain vast numbers of these mobile genetic elements, no evidence of horizontal transfer of a nuclear-encoded transposon between plant species has been detected to date. The most mutagenic known plant transposable element system is the Mutator system in maize. Mu-like elements (MULEs are widespread among plants, and previous analysis has suggested that the distribution of various subgroups of MULEs is patchy, consistent with horizontal transfer. We have sequenced portions of MULE transposons from a number of species of the genus Setaria and compared them to each other and to publicly available databases. A subset of these elements is remarkably similar to a small family of MULEs in rice. A comparison of noncoding and synonymous sequences revealed that the observed similarity is not due to selection at the amino acid level. Given the amount of time separating Setaria and rice, the degree of similarity between these elements excludes the possibility of simple vertical transmission of this class of MULEs. This is the first well-documented example of horizontal transfer of any nuclear-encoded genes between higher plants.

  8. Horizontal Transfer of a Plant Transposon.

    Directory of Open Access Journals (Sweden)

    2005-12-01

    Full Text Available The majority of well-documented cases of horizontal transfer between higher eukaryotes involve the movement of transposable elements between animals. Surprisingly, although plant genomes often contain vast numbers of these mobile genetic elements, no evidence of horizontal transfer of a nuclear-encoded transposon between plant species has been detected to date. The most mutagenic known plant transposable element system is the Mutator system in maize. Mu-like elements (MULEs are widespread among plants, and previous analysis has suggested that the distribution of various subgroups of MULEs is patchy, consistent with horizontal transfer. We have sequenced portions of MULE transposons from a number of species of the genus Setaria and compared them to each other and to publicly available databases. A subset of these elements is remarkably similar to a small family of MULEs in rice. A comparison of noncoding and synonymous sequences revealed that the observed similarity is not due to selection at the amino acid level. Given the amount of time separating Setaria and rice, the degree of similarity between these elements excludes the possibility of simple vertical transmission of this class of MULEs. This is the first well-documented example of horizontal transfer of any nuclear-encoded genes between higher plants.

  9. Determinants Of Vertical And Horizontal Export Diversification ...

    African Journals Online (AJOL)

    This implies that not all types of natural resource endowment have a 'Dutch disease' effect. While inflation, exchange rate, and foreign aid variables have a mixed effect on vertical and horizontal export diversification, political instability however has a strong adverse effect on export diversification; especially for SSA. The key ...

  10. Horizontal Axis Levitron--A Physics Demonstration

    Science.gov (United States)

    Michaelis, Max M.

    2014-01-01

    After a brief history of the Levitron, the first horizontal axis Levitron is reported. Because it is easy to operate, it lends itself to educational physics experiments and analogies. Precession and nutation are visualized by reflecting the beam from a laser pointer off the "spignet". Precession is fundamental to nuclear magnetic…

  11. Third international seminar on horizontal steam generators

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    The Third International Seminar on Horizontal Steam Generators held on October 18-20, 1994 in Lappeenranta, consisted of six sessions dealing with the topics: thermal hydraulic experiments and analyses, primary collector integrity, management of primary-to-secondary leakage accidents, feedwater collector replacement and discussion of VVER-440 steam generator safety issues.

  12. Parametric study for horizontal steam generator modelling

    Energy Technology Data Exchange (ETDEWEB)

    Ovtcharova, I. [Energoproekt, Sofia (Bulgaria)

    1995-12-31

    In the presentation some of the calculated results of horizontal steam generator PGV - 440 modelling with RELAP5/Mod3 are described. Two nodalization schemes have been used with different components in the steam dome. A study of parameters variation on the steam generator work and calculated results is made in cases with separator and branch.

  13. Evaluation of horizontal magnification on panoramic images

    Directory of Open Access Journals (Sweden)

    Maryam Raoof

    2013-01-01

    Full Text Available Aims: This study evaluated the horizontal magnification of images taken from adults and pediatrics with PM 2002 CC Planmeca analogue machine. Materials and Methods: A series of 120 panoramic radiographs were obtained of 60 adults and 60 pediatrics. For all patients, negative impressions were used to make positive casts of the teeth. A caliper was used to measure the maximum mesiodistal length of the buccal surface of all teeth except canines on both casts and radiographs. The horizontal magnification factor was calculated for incisor, premolar, and molar regions by dividing the values obtained from the casts by the values obtained from the radiographs. Statistical Analysis: Independent t-test and one-way analysis of variance (ANOVA were used. Results: The results indicated that with regard to adults, maxillary and mandibular incisor regions, unlike the other two sessions, didn′t show significant difference of the mean magnification of horizontal dimension (P = 0.5. In pediatrics, the comparison between mean magnification factors of all subgroups showed significant difference (P < 0.0001. Despite the adults′ radiographs, the results of pediatrics′ radiographs showed significantly higher magnification than the index listed by the manufacturer of the radiographic machine used. Conclusion: The present study results point to the fact that PM 2002 CC Proline panoramic machine makes possible precise measurements on radiographs of adults′ jaws in the horizontal dimension.

  14. Teaching Activities on Horizontal Nuclear Proliferation.

    Science.gov (United States)

    Zola, John

    1990-01-01

    Provides learning activities concerning the horizontal proliferation of nuclear weapons. Includes step-by-step directions for four activities: (1) the life cycle of nuclear weapons; (2) nuclear nonproliferation: pros and cons; (3) the nuclear power/nuclear weapons connection; and (4) managing nuclear proliferation. (NL)

  15. Horizontal gene transfer in the phytosphere

    NARCIS (Netherlands)

    Elsas, van J.D.; Turner, S.; Bailey, M.J.

    2003-01-01

    Here, the ecological aspects of gene transfer processes between bacteria in the phytosphere are examined in the context of emerging evidence for the dominant role that horizontal gene transfer (HGT) has played in the evolutionary shaping of bacterial communities. Moreover, the impact of the putative

  16. Detecting Highways of Horizontal Gene Transfer

    Science.gov (United States)

    Bansal, Mukul S.; Gogarten, J. Peter; Shamir, Ron

    In a horizontal gene transfer (HGT) event a gene is transferred between two species that do not share an ancestor-descendant relationship. Typically, no more than a few genes are horizontally transferred between any two species. However, several studies identified pairs of species between which many different genes were horizontally transferred. Such a pair is said to be linked by a highway of gene sharing. We present a method for inferring such highways. Our method is based on the fact that the evolutionary histories of horizontally transferred genes disagree with the corresponding species phylogeny. Specifically, given a set of gene trees and a trusted rooted species tree, each gene tree is first decomposed into its constituent quartet trees and the quartets that are inconsistent with the species tree are identified. Our method finds a pair of species such that a highway between them explains the largest (normalized) fraction of inconsistent quartets. For a problem on n species, our method requires O(n 4) time, which is optimal with respect to the quartets input size. An application of our method to a dataset of 1128 genes from 11 cyanobacterial species, as well as to simulated datasets, illustrates the efficacy of our method.

  17. Horizontal gene transfer and bacterial diversity

    Indian Academy of Sciences (India)

    Unknown

    introduction of novel physiological traits from distantly related organisms, horizontal gene transfer often causes drastic changes in the ecological ..... degradation by host restriction endonucleases. (iii) Conjugation: In this mechanism, ... mosome, formation of a conjugative bridge and trans- position into the recipient strain.

  18. comparative evaluation of pressure distribution between horizontal ...

    African Journals Online (AJOL)

    user

    Green and source function were used to evaluate the performance of horizontal well and vertical well, eventually, compared based dimensionless pressures and pressure derivatives computed by varying the reservoir geometry. Results presented as type curves show that the rate of decline of the pressure derivative curve is.

  19. Comparative evaluation of pressure distribution between horizontal ...

    African Journals Online (AJOL)

    Green and source function were used to evaluate the performance of horizontal well and vertical well, eventually, compared based dimensionless pressures and pressure derivatives computed by varying the reservoir geometry. Results presented as type curves show that the rate of decline of the pressure derivative curve is ...

  20. PODE A ARTE NOS SALVAR?

    Directory of Open Access Journals (Sweden)

    Rodrigo Rizério de Almeida e Pessoa

    2014-09-01

    Full Text Available O desenvolvimento do caráter técnico-científico-industrial da civilização moderna trouxe consigo um renovado interesse em se discutir o homem e seu lugar no mundo. Durante o século XX, seja na arte, literatura ou filosofia, não faltaram vozes anunciando para o futuro o fim do homem ou a submissão de seu pensamento a níveis cada vez maiores de alienação. O interesse ou mesmo a necessidade de se questionar um modo de resistência capaz de trazer o homem de volta a si mesmo deu origem a diferentes leituras acerca do lugar do homem no mundo moderno. Entre elas, destacamos a interpretação da essência humana desenvolvida por Martin Heidegger. Segundo o autor alemão, cumpre-nos romper com o tradicional paradigma da subjetividade, que orientou o modo como a modernidade entendeu o ser do homem. Ora, a intenção dessa pesquisa é justamente demarcar as consequências dessa ruptura com a subjetividade para a compreensão do homem e enfim problematizar as suas implicações teóricas ou filosóficas mais gerais. De fato, desde que o homem se arvorou o título de “senhor da terra” parece que ele se encontra em todos oslugares, quando, na verdade, é justamente no domínio da técnica que ele se encontra o mais distante de si mesmo ou de sua essência. Para reencontrar-se consigo mesmo, faz-se necessário a preparação para o advento do novo homem, e está reservada à arte, ao que parece, abrir caminhos na densa floresta que separa o homem de sua autenticidade. Cabe a nós, portanto, questionar se e em que medida a arte pode cumprir essa tarefa, ou se, ao contrário, estamos esperando dela mais do que pode oferecer.

  1. NOAA NOS SOS, EXPERIMENTAL - Water Temperature

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have water temperature data. *These services are for testing and evaluation...

  2. NOAA NOS SOS, EXPERIMENTAL - Air Temperature

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have air temperature data. *These services are for testing and evaluation...

  3. NOAA NOS SOS, EXPERIMENTAL - Water Level

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have water surface height above a reference datum. *These services are for...

  4. Intoxicação experimental de suínos por fumonisinas

    Directory of Open Access Journals (Sweden)

    Dilkin Paulo

    2004-01-01

    Full Text Available Os efeitos da exposição oral prolongada (28 dias à fumonisina foram estudados em suínos jovens. Os animais foram divididos em três grupos experimentais e alimentados com ração ad libitum contendo: A 0mg de FB1.kg-1 (controle; B 10mg de FB1.kg-1; C 30mg de FB1.kg-1. Os suínos foram observados duas vezes por dia; seus pesos e consumo alimentar foram registrados semanalmente. Entre o 20º e 24º dia de intoxicação, os suínos do tratamentos C apresentaram diminuição do consumo de ração e ganho de peso, sinais característicos de edema pulmonar, razão pela qual um animal foi levado a óbito aos 23 dias de intoxicação. Após 28 dias, os animais foram necropsiados e os órgãos submetidos a análises macroscópica, histopatológica e ao estudo da morfologia e histologia intestinal. Nos suínos que apresentaram sinais clínicos de intoxicação, observaram-se lesões pulmonares, hepáticas e diminuição de altura das vilosidades e profundidade das criptas e hiperplasia glandular em segmentos intestinais. Conclui-se, portanto, que substanciais perdas de produtividade podem ser induzidas em suínos alimentados com ração contaminada com baixos níveis de fumonisinas.

  5. Horizontal gene transfer between bacteria and animals

    Science.gov (United States)

    Dunning Hotopp, Julie C.

    2011-01-01

    Horizontal gene transfer is increasingly described between bacteria and animals. Such transfers that are vertically inherited have the potential to influence the evolution of animals. One classic example is the transfer of DNA from mitochondria and chloroplasts to the nucleus after the acquisition of these organelles by eukaryotes. Even today, many of the described instances of bacteria to animal transfer occur as part of intimate relationships like those of endosymbionts and their invertebrate hosts, particularly insects and nematodes, while numerous transfers are also found in asexual animals. Both of these observations are consistent with modern evolutionary theory, in particular the serial endosymbiotic theory and Muller’s ratchet. While it is tempting to suggest that these particular lifestyles might promote horizontal gene transfer, it is difficult to ascertain given the non-random sampling of animal genome sequencing projects and the lack of a systematic analysis of animal genomes for such transfers. PMID:21334091

  6. Buoyancy Driven Natural Ventilation through Horizontal Openings

    DEFF Research Database (Denmark)

    Heiselberg, Per; Li, Zhigang

    2009-01-01

    An experimental study of the phenomenon of buoyancy driven natural ventilation through single-sided horizontal openings was performed in a full-scale laboratory test rig. The measurements were made for opening ratios L/D ranging from 0.027 to 4.455, where L and D are the length of the opening...... and the diameter of the opening, respectively. The basic nature of airflow through single-sided openings, including airflow rate, air velocity, temperature difference between the rooms and the dimensions of the horizontal openings, were measured. A bi-directional airflow rate was measured using the constant...... quite well with the Epstein's formula but in other cases the measured data show clear deviations from the Epstein's formula. Thus, revised formulas for natural ventilation are proposed....

  7. Buoyancy Driven Natural Ventilation through Horizontal Openings

    DEFF Research Database (Denmark)

    Heiselberg, Per

    2009-01-01

    An experimental study of the phenomenon of buoyancy driven natural ventilation through single-sided horizontal openings was performed in a full-scale laboratory test rig. The measurements were made for opening ratios L/D ranging from 0.027 to 4.455, where L and D are the length of the opening...... and the diameter of the opening, respectively. The basic nature of airflow through single-sided openings, including airflow rate, air velocity, temperature difference between the rooms and the dimensions of the horizontal openings, were measured. A bi-directional airflow rate was measured using the constant...... quite well with the Epstein's formula ratio are presented. In some cases the measured airflow rates fit quite well with the Epstein's formula but in other cases the measured data show clear deviations from the Epstein's formula. Thus, revised formulas for natural ventilation are proposed....

  8. Study on Horizontally Polarized Omnidirectional Microstrip Antenna

    Directory of Open Access Journals (Sweden)

    Kun Wei

    2016-01-01

    Full Text Available A horizontally polarized omnidirectional microstrip antenna is proposed in this paper. The structure of designed antenna is with two back-to-back horizontally polarized microstrip antenna elements. Gain variation on main radiation plane of this new antenna is analyzed and radiation theory is deduced; formula of directivity on main radiation plane is given. Better omnidirectional characteristic of this antenna can be obtained by decreasing patch physical length. Both simulated and measured results verify the omnidirectional radiation patterns and input impedance characteristics. Good omnidirectional radiation patterns (gain variation in E-plane less than ±0.4 dBi and input impedance characteristics are obtained; moreover, cross polarization less than −20 dBi is achieved.

  9. Horizontal modular dry irradiated fuel storage system

    Science.gov (United States)

    Fischer, Larry E.; McInnes, Ian D.; Massey, John V.

    1988-01-01

    A horizontal, modular, dry, irradiated fuel storage system (10) includes a thin-walled canister (12) for containing irradiated fuel assemblies (20), which canister (12) can be positioned in a transfer cask (14) and transported in a horizontal manner from a fuel storage pool (18), to an intermediate-term storage facility. The storage system (10) includes a plurality of dry storage modules (26) which accept the canister (12) from the transfer cask (14) and provide for appropriate shielding about the canister (12). Each module (26) also provides for air cooling of the canister (12) to remove the decay heat of the irradiated fuel assemblies (20). The modules (26) can be interlocked so that each module (26) gains additional shielding from the next adjacent module (26). Hydraulic rams (30) are provided for inserting and removing the canisters (12) from the modules (26).

  10. Influência da competição catiônica nos valores de fator de retardamento e coeficiente de dispersão-difusão de zinco e cobre no solo Effect of the cationic competition on the retarding factor and dispersion-diffusion coefficient of zinc and copper in soil

    Directory of Open Access Journals (Sweden)

    Mauro A. Martinez

    2001-05-01

    Full Text Available Objetivando-se avaliar os efeitos da competição catiônica nos valores do fator de retardamento (f r e do coeficiente de dispersão-difusão (D realizaram-se ensaios de mobilidade de metais em colunas de lixiviação submetidas a escoamento permanente e saturado. Foram aplicadas soluções de zinco (700 mg L-1, cobre (200 mg L-1 e de zinco mais cobre, nas mesmas concentrações, para obtenção das respectivas curvas de eluição. Os materiais de solo utilizados foram retirados dos horizontes A, B e C de um Latossolo Vermelho-Amarelo, álico (LVa e de um Podzólico Vermelho-Amarelo, câmbico fase terraço (PVc coletados no município de Viçosa, MG. Nos solos estudados em todos os horizontes, o cobre apresentou maiores valores de fator de retardamento que o zinco, indicando apresentar maior interação com a fração sólida do solo. As baixas velocidades de avanço das soluções proporcionaram a obtenção de baixos valores de coeficiente de dispersão-difusão no solo e a competição catiônica diminuiu a capacidade de retenção dos cátions no solo.The effects of the cationic competition on the retarding factor (fr and the dispersion-diffusion coefficient (D were evaluated with conducting metal mobility trials in leaching columns submitted to a saturated and steady flow. Solutions of zinc (700 mg L-1, copper (200 mg L-1 and zinc plus copper in the same concentrations, were used to obtain elution curves. Soil materials from the A, B and C horizons of Oxisol (LVa and of Ultisol (PVc, collected in Viçosa, MG, were used. In all soil materials used, copper presented higher retarding factor values than zinc, which indicates a higher copper-soil interaction. The low velocities of the solutions resulted in low dispersion-diffusion coefficient values. Cationic competition decreased the soil retention capacity for the cations.

  11. Gas reservoir evaluation for underbalanced horizontal drilling

    Directory of Open Access Journals (Sweden)

    Li Gao

    2014-01-01

    Full Text Available A set of surface equipment for monitoring the parameters of fluid and pressure while drilling was developed, and mathematical models for gas reservoir seepage and wellbore two-phase flow were established. Based on drilling operation parameters, well structure and monitored parameters, the wellbore pressure and the gas reservoir permeability could be predicted theoretically for underbalanced horizontal drilling. Based on the monitored gas production along the well depth, the gas reservoir type could be identified.

  12. Surgical treatment for paralytic horizontal strabismus

    Directory of Open Access Journals (Sweden)

    Feng Zhou*

    2015-08-01

    Full Text Available AIM: To observe the effect of surgery for paralytic horizontal strabismus and the paralytic horizontal strabismus performed by Jensen procedure with antagonist muscle of paralytic muscle recession and medial or lateral rectus extra large resection/recession.METHODS: Fifteen cases(17 eyeswith complete or nearly complete paralytic horizontal strabismus from January 2005 to August. 2014 in our hospital were assessed retrospectively,7 eyes of 7 cases with treatment group A were performed Jensen procedure combined antagonist muscle of paralytic muscle recession, 10 eyes of 8 cases with treatment group B were performed medial or lateral rectus extra large resection/recession. seventeen eyes of 15 cases with an average of 21±8.71mo follow-up were observed.RESULTS: All 17 eyes of 15 cases after the operation obtained satisfied effects, 16 eyes of 14 cases obtained ideal long-term effect. One eye of a patient with a 6mo follow-up was undercorrected of 30△. We found a varying degree of postoperative improvement in visual function. There was a significant reduction in the strabismus angle for distance and near(t=28.71, Pt=36.21, Pt=17.96, Pt=9.20,PCONCLUSION: Jensen procedure combined antagonist muscle of paralytic muscle recession and medial or lateral rectus extra large resection/recession is a safe and successful method of treatment in complete or nearly complete paralysis horizontal strabismus. Patients achieve orthophoria, improvement of the motor ability, and larger field of binocular single vision for long time.

  13. Vertical and horizontal seismometric observations of tides

    Science.gov (United States)

    Lambotte, S.; Rivera, L.; Hinderer, J.

    2006-01-01

    Tidal signals have been largely studied with gravimeters, strainmeters and tiltmeters, but can also be retrieved from digital records of the output of long-period seismometers, such as STS-1, particularly if they are properly isolated. Horizontal components are often noisier than the vertical ones, due to sensitivity to tilt at long periods. Hence, horizontal components are often disturbed by local effects such as topography, geology and cavity effects, which imply a strain-tilt coupling. We use series of data (duration larger than 1 month) from several permanent broadband seismological stations to examine these disturbances. We search a minimal set of observable signals (tilts, horizontal and vertical displacements, strains, gravity) necessary to reconstruct the seismological record. Such analysis gives a set of coefficients (per component for each studied station), which are stable over years and then can be used systematically to correct data from these disturbances without needing heavy numerical computation. A special attention is devoted to ocean loading for stations close to oceans (e.g. Matsushiro station in Japon (MAJO)), and to pressure correction when barometric data are available. Interesting observations are made for vertical seismometric components; in particular, we found a pressure admittance between pressure and data 10 times larger than for gravimeters for periods larger than 1 day, while this admittance reaches the usual value of -3.5 nm/s 2/mbar for periods below 3 h. This observation may be due to instrumental noise, but the exact mechanism is not yet understood.

  14. Portable top drive cuts horizontal drilling costs

    Energy Technology Data Exchange (ETDEWEB)

    Jackson, B. [Saskoil, Regina, Saskatchewan (Canada); Yager, D. [Tesco Drilling Tech., Calgary, Alberta (Canada)

    1993-11-01

    Economic analysis of a seven-well, long-reach horizontal drilling program into an unconsolidated, heavy-oil-bearing reservoir in Winter field near the Alberta/Saskatchewan border in Canada reveals that -- in the right application -- renting a portable top drive drilling system can reduce total drilling costs. Use of the portable top drive combined with other cost-saving measures enabled Saskoil, one of Canada`s larger independents, to drill more cheaply, on a cost-per-meter basis, in 1993 than in 1992. This was despite significant rental rates for drilling rigs and directional drilling services caused by increased demand in Western Canada. Total cost savings of 10% on wells that would otherwise cost in the (C) $500,000 range are believed realistic. Based on this year`s performance, Saskoil recommends top drive for the company`s future horizontal wells in this area. This article describes the operator`s horizontal well program, advantages of top drive in that program and how it was installed and applied. Estimated time savings for six wells, plus other ways top drive can cut costs and improve operations are discussed.

  15. The horizontal plane appearances of scoliosis

    DEFF Research Database (Denmark)

    Illés, Tamás S.; Burkus, Máté; Somoskeőy, Szabolcs

    2017-01-01

    Purpose: A posterior-anterior vertebral vector is proposed to facilitate visualization and understanding of scoliosis. The aim of this study was to highlight the interest of using vertebral vectors, especially in the horizontal plane, in clinical practice. Methods: We used an EOS two-/three-dimen......Purpose: A posterior-anterior vertebral vector is proposed to facilitate visualization and understanding of scoliosis. The aim of this study was to highlight the interest of using vertebral vectors, especially in the horizontal plane, in clinical practice. Methods: We used an EOS two...... cases of a normal spine and a thoracic scoliosis are presented. Results: For a normal spine, vector projections in the transverse plane are aligned with the posterior-anterior anatomical axis. For a scoliotic spine, vector projections in the horizontal plane provide information on the lateral...... of scoliosis. The approach used is simple. These results are sufficient for a first visual analysis furnishing significant clinical information in all three anatomical planes. This visualization represents a reasonable compromise between mathematical purity and practical use....

  16. Construction of preheaters with horizontal tubes

    Energy Technology Data Exchange (ETDEWEB)

    Goetze

    1944-09-27

    This report involved construction of preheaters for distillation and cracking plants in the oil industry, particularly in America. The use of heat transmission by radiation was also a consideration here. The recycling of waste gases occurred, but was not the rule. A convection section was often built next to the radiation section, in which the discharge gases were used for heating the incoming product. The general arrangement of the preheaters was discussed. The first form was a rectangular box with fireproof lining with tubes arranged in a single row along the outer walls and sometimes in a double row on the ceiling. It consisted of smooth and finned tubes. From the simple form a double preheater was developed that allowed one or two common discharge flues to provide as large a heating surface as possible within a reasonable space. Other items discussed were recycling of waste gases, reasons for the choice of horizontal preheaters with radiation heating, the use of vertical tubes in the U.S.A. and elsewhere in the oil industry, details of horizontal preheater tubes, end closures, material, suspension, protection against overloading by radiation, circulation heating, burners, use of horizontal radiation preheaters in hydrogenation in the U.S.A., rebuilding I. G. preheaters, construction, tube supports, and masonry. A list of references on cracking, preheaters, heat transmission, and alloyed steels was given.

  17. Endogenous angiotensin II modulates nNOS expression in renovascular hypertension

    Directory of Open Access Journals (Sweden)

    T.M.C. Pereira

    2009-07-01

    Full Text Available Nitric oxide (NO influences renal blood flow mainly as a result of neuronal nitric oxide synthase (nNOS. Nevertheless, it is unclear how nNOS expression is modulated by endogenous angiotensin II, an inhibitor of NO function. We tested the hypothesis that the angiotensin II AT1 receptor and oxidative stress mediated by NADPH oxidase contribute to the modulation of renal nNOS expression in two-kidney, one-clip (2K1C hypertensive rats. Experiments were performed on male Wistar rats (150 to 170 g body weight divided into 2K1C (N = 19 and sham-operated (N = 19 groups. nNOS expression in kidneys of 2K1C hypertensive rats (N = 9 was compared by Western blotting to that of 2K1C rats treated with low doses of the AT1 antagonist losartan (10 mg·kg-1·day-1; N = 5 or the superoxide scavenger tempol (0.2 mmol·kg-1·day-1; N = 5, which still remain hypertensive. After 28 days, nNOS expression was significantly increased by 1.7-fold in the clipped kidneys of 2K1C rats and by 3-fold in the non-clipped kidneys of 2K1C rats compared with sham rats, but was normalized by losartan. With tempol treatment, nNOS expression increased 2-fold in the clipped kidneys and 1.4-fold in the non-clipped kidneys compared with sham rats. The changes in nNOS expression were not followed by changes in the enzyme activity, as measured indirectly by the cGMP method. In conclusion, AT1 receptors and oxidative stress seem to be primary stimuli for increased nNOS expression, but this up-regulation does not result in higher enzyme activity.

  18. Angiotensin II blockade causes acute renal failure in eNOS-deficient mice

    Directory of Open Access Journals (Sweden)

    Jürgen Schnermann

    2001-03-01

    Full Text Available Compared with wild-type mice, adult endothelial nitric oxide synthase (eNOS knockout mice (eight months of age have increased blood pressure (BP (126±9 mmHg vs. 100±4 mmHg, and an increased renal vascular resistance (155±16 vs. 65±4 mmHg.min/ml. Renal vascular resistance responses to i.v. administration of noradrenaline were markedly enhanced in eNOS knockout mice. Glomerular filtration rate (GFR of anaesthetised eNOS -/- mice was 324±57 µl/min gKW, significantly lower than the GFR of 761±126 µl/min.gKW in wild-type mice. AT1-receptor blockade with i.v. candesartan (1—1.5 mg/kg reduced arterial blood pressure and renal vascular resistance, and increased renal blood flow (RBF to about the same extent in wild-type and eNOS -/- mice. Candesartan did not alter GFR in wild-type mice (761±126 vs. 720±95 µl/min.gKW, but caused a marked decrease in GFR in eNOS -/- mice (324.5±75.2 vs. 77±18 µl/min.gKW. A similar reduction in GFR of eNOS deficient mice was also caused by angiotensin-converting enzyme (ACE inhibition. Afferent arteriolar granularity, a measure of renal renin expression, was found to be reduced in eNOS -/- compared with wild-type mice. In chronically eNOS-deficient mice, angiotensin II (Ang II is critical for maintaining glomerular filtration pressure and GFR, presumably through its effect on efferent arteriolar tone.

  19. Petroduric and 'petrosepiolitic' horizons in soils of Namaqualand, South Africa Horizontes petrodúricos y "petrosepiolíticos" en suelos de Namaqualand, Suráfrica Horizontes petrodúricos e “petrosepiolíticos” em solos de Namaqualand, África do Sul

    Directory of Open Access Journals (Sweden)

    Michele Louise Francis

    2012-03-01

    revestimientos crecientes en huecos; una matriz rojiza debida a óxidos de hierro; y revestimientos isotrópicos amorfos translúcidos de sílice en granos y huecos. En los horizontes de “sepiocreta” la sepiolita se encuentra como una matriz de fibras entrelazadas subhorizontales, yuxtapuesta a un material amorfo compuesto principalmente de sílice, con considerables cantidades de aluminio y menos magnesio. Éste último es pardo claro en luz polarizada paralela, no completamente isotrópico y con una menor birrefringencia que la sepiolita. La calcita es normalmente micrítica, aunque aparece también como gránulos sueltos y cristales elongados en una matriz de sepiolita. La presencia de áreas con estructura laminar ricas en Si y Al sugiere que existen propiedades dúricas localizadas, por lo que no se puede descartar un refuerzo mutuo entre la sepiolita y la sílice. A pesar de ello, los horizontes de “sepiocreta” no cumplen los requisitos de colapso de los horizontes petrodúricos (“dorbank” en la región, de los que difieren en aspecto. Contienen más MgO que los horizontes petrodúricos asociados, y no contienen suficiente SiO2 para ser clasificados como silcreta. Si bien la terminología “-creta” es útil para designar la naturaleza cementada de un horizonte, se proponen específicamente los términos “sepiolítico” y “petrosepiolítico” (análogos a “cálcico” y “petrocálcico” para adaptarse a los sistemas de descripción y clasificación de suelos actuales. El término “sepiolítico” podría utilizarse como adjetivo en horizontes petrocálcicos o petrodúricos en que la sepiolita no es el principal agente cementante. Probablemente la génesis de los horizontes petrosepiolíticos es similar a la de los horizontes petrocálcicos y petrodúricos, excepto por las diferencias en la composición química de las soluciones matriz a partir de las que han precipitadosolución del suelo a medida que se evapora.

    Nos Calcisols e Durisols de

  20. The Potential for Horizontal Gene Transfer in Sea Ice

    Science.gov (United States)

    Collins, R. E.; Deming, J. W.

    2010-04-01

    Sea ice is a potential hotspot for horizontal gene transfer due to physical concentration of bacteria, viruses, and extracellular DNA. An ice-affiliated bacterium, "Colwellia psychrerythraea," has acquired genes for compatible solute degradation via horizontal gene transfer.

  1. Genetics Home Reference: horizontal gaze palsy with progressive scoliosis

    Science.gov (United States)

    ... Health Conditions HGPPS Horizontal gaze palsy with progressive scoliosis Printable PDF Open All Close All Enable Javascript ... collapse boxes. Description Horizontal gaze palsy with progressive scoliosis ( HGPPS ) is a disorder that affects vision and ...

  2. Cuttings Transport Models and Experimental Visualization of Underbalanced Horizontal Drilling

    OpenAIRE

    Na Wei; YingFeng Meng; Gao Li; LiPing Wan; ZhaoYang Xu; XiaoFeng Xu; YuRui Zhang

    2013-01-01

    Aerated underbalanced horizontal drilling technology has become the focus of the drilling industry at home and abroad, and one of the engineering core issues is the horizontal borehole cleaning. Therefore, calculating the minimum injection volume of gas and liquid accurately is essential for the construction in aerated underbalanced horizontal drilling. This paper establishes a physical model of carrying cuttings and borehole cleaning in wellbore of horizontal well and a critical transport ma...

  3. Ureilite Carbon and mg Number

    Science.gov (United States)

    Hudon, P.; Romanek, C.; Paddock, L.; Mittlefehldt, D. W.

    2004-05-01

    Ureilites are carbon-bearing ultramafic achondrites composed primarily of olivine and pyroxene with intergranular fine-grained metal, sulfides, and silicates. Carbon (up to 6.5 wt%) is either amorphous or present as graphite, lonsdaleite, and/or diamond. It has been shown that carbon-silicate redox (i.e. "smelting") reactions are responsible for the positive correlation between modal percent pigeonite and mg# and for the negative FeO-MnO trend seen in the mineral and bulk compositions of ureilites. Carbon redox reactions are strongly exothermic and pressure dependent; so ureilites with the largest mg# are the most reduced, experienced the highest temperatures, and formed at the lowest pressures, i.e. near the surface of the ureilite parent body. Ureilites with the largest mg# have the smallest δ 18O and the largest Δ 17O. To further investigate possible relationships, we performed carbon isotope and electron probe measurements on a suite of 27 ureilites in order to see the type of correlation that exists between mg# and carbon. Mg#s of olivine cores, carbon contents, and δ 13C data were taken from this study and the literature, and averaged. Polymict ureilites were not considered. A well-defined negative correlation is observed between the mg# of olivine cores and Δ 17O. A less well-defined negative correlation may exist between mg# of olivine cores and δ 13C, but there is substantial scatter in the data. However, a well-defined negative correlation exists between mg# of olivine rims and δ 13C. At first glance, this trend is unexpected: if ureilites with the largest mg# experienced the greatest amount of reduction, they should have the largest δ 13C and the correlation between mg# and δ 13C should be positive. A plot of carbon content versus δ 13C seems to show a general trend: the smaller the carbon content, the heavier is the carbon. This general trend is exactly what one would expect if smelting has affected the ureilite parent body: the more C is

  4. Horizontal gene transfer among genomes: The complexity hypothesis

    OpenAIRE

    Jain, Ravi; Rivera, Maria C.; Lake, James A.

    1999-01-01

    Increasingly, studies of genes and genomes are indicating that considerable horizontal transfer has occurred between prokaryotes. Extensive horizontal transfer has occurred for operational genes (those involved in housekeeping), whereas informational genes (those involved in transcription, translation, and related processes) are seldomly horizontally transferred. Through phylogenetic analysis of six complete prokaryotic genomes and the identification of 312 sets of orthologous genes present i...

  5. Aortic eNOS expression and phosphorylation in Apo-E knockout mice: differing effects of rapamycin and simvastatin.

    Science.gov (United States)

    Naoum, Joseph J; Zhang, Shu; Woodside, Kenneth J; Song, Wei; Guo, Qian; Belalcazar, Ligia M; Hunter, Glenn C

    2004-08-01

    The inhibition of nitric oxide (NO) by hypercholesterolemia may be mediated, in part, by interactions with caveolin-1 (Cav-1). Because of the facilitatory effects of statins on endothelial function and the adverse effects of rapamycin (RAPA) on plasma lipids, we compared the effects of simvastatin (SMV) and RAPA on endothelial NO synthase (eNOS) and Cav-1 protein expression and phosphorylation in the aortas of apolipoprotein E (Apo-E) knockout (-/-) mice. Apo-E -/- mice (n = 38) fed a high-cholesterol diet were given SMV (100 mg/kg/day po), RAPA (3 mg/kg/day ip), or no treatment for 10 weeks. Blood was drawn for serum lipid analysis, and protein was extracted for Western immunoblotting. Selected aortic specimens from 2 animals in each group were examined by histology and immunohistochemistry. The data are expressed as the mean +/- SEM and compared by the Student t test and ANOVA. Significance was established as P < .05. Lipid levels at 10 weeks were similar in the 3 groups except for higher triglyceride levels in RAPA-treated animals. eNOS expression was highest in RAPA-treated mice, but the p-eNOS to eNOS protein expression ratio was significantly greater in the SMV treatment group compared to both RAPA and controls (P < .05). Both Cav-1 and p-Cav-1 expression was significantly lower in the SMV-treated animals (P < .05) compared to mice treated with RAPA. Although eNOS expression was greatest in the RAPA-treated mice, the expression of p-eNOS was similar in the RAPA- and SMV-treated animals. The increase in eNOS induced by RAPA and the inverse relationship between p-eNOS and Cav-1 protein expression observed with SMV treatment suggest different mechanisms for the regulation of aortic eNOS expression in Apo-E mice by these 2 agents. Copyright 2004 Elsevier Inc.

  6. Search for horizontal bosons at the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Albright, C.H.; Deshpande, N.G.; Gunion, J.F.; Haber, H.E.

    1984-01-01

    The production process anti p p ..-->.. l/sup -/l'/sup +/ + X, where the leptons belong to two different generations and X refers to spectator jets, provides a clear signature for horizontal (generation-changing) bosons when the leptons are emitted nearly back-to-back and p/sub T//sup miss/ = 0. Cross sections and p/sub T/ distributions for each lepton are presented, and discovery limits on M/sub H/ are extracted for several different channels.

  7. Variation in terminology: capoeira in Belo Horizonte

    Directory of Open Access Journals (Sweden)

    César Nardelli Cambraia

    2014-12-01

    Full Text Available In this pilot study we analyzed the variation in the terminology of capoeira in Belo Horizonte. The terms referring to 69 videotaped movements of capoeira were collected from 10 informants (5 men and 5 women, aged between 25 and 32 years, capoeira teachers. As a result we obtained 294 different terms whose patterns of variation are distributed among 15 types. We tested the hypothesis that the figurative terms tend to be replaced by non-figurative ones, and it was confirmed by the collected data. This trend was the result of a search for transparency in terminology, making the terms more descriptive in relation to capoeira’s movements.

  8. Feedback from luminosity horizontal cells mediates depolarizing responses of chromaticity horizontal cells in the Xenopus retina.

    OpenAIRE

    Witkovsky, P; Gabriel, R; Krizaj, D; Akopian, A.

    1995-01-01

    It has been proposed that the depolarizing responses of chromaticity horizontal cells (C-HCs) to red light depend on a feedback signal from luminosity horizontal cells (L-HCs) to short-wavelength-sensitive cones in the retinas of lower vertebrates. In this regard we studied the C-HCs of the Xenopus retina. C-HCs and L-HCs were identified by physiological criteria and then injected with neurobiotin. The retina then was incubated with peanut agglutinin, which stains red-but not blue-sensitive c...

  9. Coulomb excitation of (31)Mg

    CERN Document Server

    Seidlitz, M; Reiter, P; Bildstein, V; Blazhev, A; Bree, N; Bruyneel, B; Cederkall, J; Clement, E; Davinson, T; van Duppen, P; Ekstrom, A; Finke, F; Fraile, L M; Geibel, K; Gernhauser, R; Hess, H; Holler, A; Huyse, M; Ivanov, O; Jolie, J; Kalkuhler, M; Kotthaus, T; Krucken, R; Lutter, R; Piselli, E; Scheit, H; Stefanescu, I; van de Walle, J; Voulot, D; Warr, N; Wenander, F; Wiens, A

    2011-01-01

    The ground state properties of ^3^1Mg indicate a change of nuclear shape at N=19 with a deformed J^@p=1/2^+ intruder state as a ground state, implying that ^3^1Mg is part of the ''island of inversion''. The collective properties of excited states were the subject of a Coulomb excitation experiment at REX-ISOLDE, CERN, employing a radioactive ^3^1Mg beam. De-excitation @c-rays were detected by the MINIBALL @c-spectrometer in coincidence with scattered particles in a segmented Si-detector. The level scheme of ^3^1Mg was extended. Spin and parity assignment of the 945 keV state yielded 5/2^+ and its de-excitation is dominated by a strong collective M1 transition. Comparison of the transition probabilities of ^3^0^,^3^1^,^3^2Mg establishes that for th e N=19 magnesium isotope not only the ground state but also excited states are largely dominated by a deformed pf intruder configuration.

  10. Applying GPS to check horizontal control quality

    Directory of Open Access Journals (Sweden)

    Jakub Vincent

    2004-03-01

    Full Text Available GPS technologies can also be used for check quality in available horizontal point set with coordinates CJ of the frame S-JTSK. When survey and setting-out tasks should be performed in certain area, one can found in it allways some points of the fundamental and detail state controls. To use these points for some actual aims, it is necessary to investigate their compatibility (among the point mark positions and the point coordinate of control points. This can be done using GPS surveying that may be at the same time employed to determine the new point in the relevant area.Principle of quality investigatingf an existing control is founded on determination of point coordinates CJt from GPS measurements. Then, based on discrepancies among the "official" netpoint coordinates CJ and coordinates CJt "given by GPS", it can be estimated the degree and the real compatibility dislocations in the network structure of the existing points.Realisation procedure for the introduced investigation is demonstrated on GPS checking (by SOKKIA STRATUS receivers horizontal control for reconstruction of a railway bridge on river Bodrog in East Slovakia.It can be shown from the results in Table 3, that points P3 and P7 are useless due to their incompatibility (inconsistency in the inspected point set. For other 7 points (Table 7 the average measure of incompatibility reads 9.8 mm that make possible applying these points for precise setting-out

  11. Identidad e interculturalidad: un horizonte por visitar

    Directory of Open Access Journals (Sweden)

    Marian Pérez Bernal

    2016-01-01

    Full Text Available En el presente trabajo mantenemos que el concepto de identidad defendido por Amin Maalouf puede ser una interesante vía para conseguir una aproximación entre las distintas culturas capaz de conducirnos a un diálogo fructífero que nos permitan gestionar la multiculturalidad actual. Defendemos que las culturas sean vistas como escenas de debate y contestación en constante proceso de construcción y reconstrucción y en las que siempre primen unos valores que nos conciernen a todos y que han de ser irrenunciables.In this paper, it is stated that the concept of identity defended by Amin Maalouf could be an interesting way to achieve a rapprochement amongst different cultures. This could lead to a fruitful dialog allowing to manage today’s multiculturalism. It is also defended that cultures should be considered as instruments of debate and reply on a continuous process of construction and reconstruction. However, cultures should not prevail over a series of values that concern to all of us and that should be inalienable.

  12. Nitrite enhances liver graft protection against cold ischemia reperfusion injury through a NOS independent pathway.

    Science.gov (United States)

    Cherif-Sayadi, Amani; Hadj Ayed-Tka, Kaouther; Zaouali, Mohamed Amine; Bejaoui, Mohamed; Hadj-Abdallah, Najet; Bouhlel, Ahlem; Ben Abdennebi, Hassen

    2017-12-01

    Nitrite has been found to protect liver graft from cold preservation injury. However, the cell signaling pathway involved in this protection remains unclear. Here, we attempt to clarify if the NOS pathway by using the NOS inhibitor, L-NAME (L-N(G)-Nitroarginine methyl ester). Rat livers were conserved for 24 h at 4°C in (IGL-1) solution enriched or not with nitrite at 50 nM. In a third group, rats were pretreated with 50 mg/kg of L-NAME before their liver procurement and preservation in IGL-1 supplemented with nitrite (50 nM) and L-NAME (1 mM). After 24 h of cold storage, rat livers were ex-vivo perfused at 37°C during 2 h. Control livers were perfused without cold storage. Nitrite effectively protected the rat liver grafts from the onset of cold I/R injury. L-NAME treatment did not abolish the beneficial effects of nitrite. Liver damage, protein oxidation and lipid peroxidation remained at low levels in both nitrite-treated groups when compared to IGL-1 group. Antioxidant enzyme activities and functional parameters were unchanged after NOS inhibition. Despite NOS inhibition by L-NAME, nitrite can still provide hepatic protection during cold I/R preservation. This suggests that nitrite acts through a NOS-independent pathway.

  13. Pedogeoquímica em perfis de alteração na região de Lavras (MG. II - elementos menores e elementos das terras raras

    Directory of Open Access Journals (Sweden)

    M. P. C. Lacerda

    2002-03-01

    Full Text Available Na região de Lavras, MG, analisou-se o comportamento geoquímico dos elementos menores (EM e elementos das terras raras (ETR ao longo da evolução pedogenética em perfis de solos com horizonteB textural, individualizados a partir de rochas de composição ácida, intermediária e básica do substrato. Nos perfis, realizaram-se análises químicas de EM e ETR, avaliando perdas e ganhos pelo balanço químico de massa. O estudo possibilitou o grupamento dos EM em duas classes: (amobilidade moderada a alta: perda da rocha fresca até o sólum; (bmobilidade moderada: enriquecimento relativo e eventualmente real no sólum. O comportamento dos ETR revelou grande mobilidade ao longo da evolução dos perfis de alteração.

  14. NUMERICAL DETERMINATION OF HORIZONTAL SETTLERS PERFORMANCE

    Directory of Open Access Journals (Sweden)

    M. M. Biliaiev

    2015-08-01

    Full Text Available Purpose.Horizontal settlers are one of the most important elements in the technological scheme of water purification. Their use is associated with the possibility to pass a sufficiently large volume of water. The important task at the stage of their designing is evaluating of their effectiveness. Calculation of the efficiency of the settler can be made by mathematical modeling. Empirical, analytical models and techniques that are currently used to solve the problem, do not allow to take into account the shape of the sump and various design features that significantly affects the loyalty to a decision on the choice of the size of the settling tank and its design features. The use of analytical models is limited only to one-dimensional solutions, does not allow accounting for nonuniform velocity field of the flow in the settler. The use of advanced turbulence models for the calculation of the hydrodynamics in the settler complex forms now requires very powerful computers. In addition, the calculation of one variant of the settler may last for dozens of hours. The aim of the paper is to build a numerical model to evaluate the effectiveness of horizontal settling tank modified design. Methodology. Numerical models are based on: 1 equation of potential flow; 2 equation of inviscid fluid vortex flow; 3 equation of viscous fluid dynamics; 4 mass transfer equation. For numerical simulation the finite difference schemes are used. The numerical calculation is carried out on a rectangular grid. For the formation of the computational domain markers are used. Findings.The models allow calculating the clarification process in the settler with different form and different configuration of baffles. Originality. A new approach to investigate the mass transfer process in horizontal settler was proposed. This approach is based on the developed CFD models. Three fluid dynamics models were used for the numerical investigation of flows and waste waters purification

  15. Myasthenia Gravis (MG): Medical Management

    Science.gov (United States)

    ... extremely rare. Thymectomy Thymectomy — surgical removal of the thymus gland — is recommended for thymoma and for most cases of generalized MG. It’s believed to be the only therapy capable of ... Because the thymus is required for immune system development, most doctors ...

  16. FTA analysis of the failure in the horizontal fluidity test

    Directory of Open Access Journals (Sweden)

    Peter Blaško

    2015-12-01

    Full Text Available The purpose of the paper was to evaluate the probability of the top event in the fluidity test by Fault Tree Analysis (FTA. One of the important tests used in the foundry practice is the test of the fluidity. Fluidity is the ability of the molten metal to fill the cavity of the molds and create a cast. The AlSi10MgMn (EN 1706 alloy with 5 or 10.54 % of silica was the experimental material. The melted alloy was cast into "horizontal" three-channel mold to test its fluidity. The pouring temperatures were between 605 and 830 °C. In some cases, the experiment was not successful, for a some reasons. This fact led to a waste of time, energy, potential risk of accident, confusion among participants, especially "beginners" founders and became an impulse for the analysis of creation and possible events of fault for the fluidity test using the FTA. It has been found that for the probability of the top event in examined process was disproportionately high (0.29824. The Monte Carlo method was used for the simulation of the effect of decreasing the probability of basic events on the probability of the top event – the fault of the fluidity test.

  17. Horizontal transfer of antibiotic resistance genes in a membrane bioreactor.

    Science.gov (United States)

    Yang, Dong; Wang, Jingfeng; Qiu, Zhigang; Jin, Min; Shen, Zhiqiang; Chen, Zhaoli; Wang, Xinwei; Zhang, Bin; Li, Jun-Wen

    2013-09-20

    Growing attention has been paid to the dissemination of antibiotic resistance genes (ARGs) in wastewater microbial communities. The application of membrane bioreactors (MBRs) in wastewater treatment is becoming increasingly widespread. We hypothesized that the transfer of ARGs among bacteria could occur in MBRs, which combine a high density of bacterial cells, biofilms, and antibiotic resistance bacteria or ARGs. In this study, the transfer discipline and dissemination of the RP4 plasmid in MBRs were investigated by the counting plate method, the MIDI microorganism identification system, and quantitative polymerase chain reaction (qPCR) techniques. The results showed that the average transfer frequency of the RP4 plasmid from the donor strain to cultivable bacteria in activated sludge was 2.76×10⁻⁵ per recipient, which was greater than the transfer frequency in wastewater and bacterial sludge reported previously. In addition, many bacterial species in the activated sludge had received RP4 by horizontal transfer, while the genera of Shewanella spp., Photobacterium spp., Pseudomonas spp., Proteus spp., and Vibrio spp. were more likely to acquire this plasmid. Interestingly, the abundance of the RP4 plasmid in total DNA remained at high levels and relatively stable at 10⁴ copies/mg of biosolids, suggesting that ARGs were transferred from donor strains to activated sludge bacteria in our study. Thus, the presence of ARGs in sewage sludge poses a potential health threat. Crown Copyright © 2013. Published by Elsevier B.V. All rights reserved.

  18. Anaerobic horizontal flow reactor with polyethylene terephthalate as support material

    Directory of Open Access Journals (Sweden)

    Marcelo Muñoz

    2016-06-01

    Full Text Available A pilot anaerobic reactor was installed to remove the organic load of wastewater from dairy industry. It uses a bacterial inoculum previously acclimated to the substrate. It was disposed horizontally and filled with pieces of polyethylene terephthalate (PET, from plastic bottles. The reactor was operated at room temperature, during 100 days, in three phases: 1 the reactor was stabilized with volumetric organic load from 0.013 to 0.500 kg/day.m³; 2 the hydraulic retention time was of 1 day and the volumetric organic load of 3 kg/day.m³; 3 the volumetric organic load was incremented from 4 to 6.6 kg/day.m³ and the hydraulic retention time was 1 day. Organic material removal efficiencies was of 85%, and approximately 75% were obtained in the second and third phase, respectively. The Y value was 0.15, indicating that 0.15 kg of biomass were generated by kg of QDO supplied to the reactor. Finally, the biomass generated inside the reactor was analyzed, obtaining a value of 18868 mg/L, which is a higher value than those of conventional systems.

  19. Impacto do Programa Fica Vivo na redução dos homicídios em comunidade de Belo Horizonte Impacto del Programa Permanezca Vivo en la reducción de los homicidios en comunidad de Belo Horizonte, Sureste de Brasil Impact of the Staying Alive Program on the reduction of homicides in a community in Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Andréa Maria Silveira

    2010-06-01

    Full Text Available OBJETIVO: Avaliar o impacto de programa de prevenção de homicídios. MÉTODOS: Com base nos dados do Programa Fica Vivo, de prevenção de homicídios, foi realizado um estudo quase experimental com análise de séries temporais da ocorrência de homicídios no aglomerado Morro das Pedras, em Belo Horizonte, MG, de 2002 a 2006. Comparou-se o número de homicídios ocorridos nessa localidade com os de outras favelas violentas e não violentas e outros bairros da cidade, em cada uma das fases do Programa. Para testar a hipótese de que a redução dos homicídios resultou das ações implementadas pelo Programa, foi elaborado um modelo estatístico baseado em modelos lineares generalizados. RESULTADOS: Nos primeiros seis meses obteve-se 69% de redução no número médio de homicídios. Nos períodos de refluxo e retomada parcial do Programa, o efeito de redução dos homicídios diminuiu, mas a diferença entre coeficientes com aquele do período inicial não foi estatisticamente significante. Mesmo com a retomada integral do Programa, o efeito continuou similar aos dos períodos anteriores, provavelmente porque o Programa foi implantado em outras favelas violentas da cidade. CONCLUSÕES: Os resultados apontam que o modelo do Programa Fica Vivo pode constituir uma importante alternativa para prevenção de homicídios contra jovens em comunidades que apresentem características semelhantes às da experiência piloto no Morro das Pedras.OBJETIVO: Evaluar el impacto del programa de prevención de homicidios. MÉTODOS: Con base en los datos del Programa "Fica Vivo" (Permanezca Vivo, de prevención de homicidios, fue realizado un estudio quasi experimental con análisis de series temporales de la ocurrencia de homicidios en el región urbanizada Morro das Pedras en Belo Horizonte, Sureste de Brasil, de 2002 a 2006. Se comparó el número de homicidios ocurridos en esa localidad con los de otros barrios violentos y no violentos y otras

  20. Horizontal stresses below two agricultural vehicles

    DEFF Research Database (Denmark)

    Lamande, Mathieu André Maurice; Munkholm, Lars Juhl; Nielsen, Janne Aalborg

    below the edge of tires. Stress distribution at the tire/soil contact is not uniform. Dimensions and inflation pressure are key factors for the ability of agricultural tires to distribute the wheel load. Our hypothesis was that the risk of shearing increases with the tire inflation pressure...... and the number of wheels. We measured horizontal stress at two depths (0.3 and 0.5 m) below tires of two slurry spreaders: one self-propelled machine equipped with wide tires (1.050 m) and low inflation pressure (150 kPa) but carrying a high wheel load (120 kN), and one tractor towing a three-axle slurry...... confounded (wheel load, inflation...

  1. Horizontal Gene Transfer, Dispersal and Haloarchaeal Speciation

    Science.gov (United States)

    Papke, R. Thane; Corral, Paulina; Ram-Mohan, Nikhil; de la Haba, Rafael R.; Sánchez-Porro, Cristina; Makkay, Andrea; Ventosa, Antonio

    2015-01-01

    The Halobacteria are a well-studied archaeal class and numerous investigations are showing how their diversity is distributed amongst genomes and geographic locations. Evidence indicates that recombination between species continuously facilitates the arrival of new genes, and within species, it is frequent enough to spread acquired genes amongst all individuals in the population. To create permanent independent diversity and generate new species, barriers to recombination are probably required. The data support an interpretation that rates of evolution (e.g., horizontal gene transfer and mutation) are faster at creating geographically localized variation than dispersal and invasion are at homogenizing genetic differences between locations. Therefore, we suggest that recurrent episodes of dispersal followed by variable periods of endemism break the homogenizing forces of intrapopulation recombination and that this process might be the principal stimulus leading to divergence and speciation in Halobacteria. PMID:25997110

  2. Horizontal gene exchange in environmental microbiota

    Directory of Open Access Journals (Sweden)

    Rustam I Aminov

    2011-07-01

    Full Text Available Horizontal gene transfer (HGT plays an important role in the evolution of life on the Earth. This view is supported by numerous occasions of HGT that are recorded in the genomes of all three domains of living organisms. HGT-mediated rapid evolution is especially noticeable among the Bacteria, which demonstrate formidable adaptability in the face of recent environmental changes imposed by human activities, such as the use of antibiotics, industrial contamination, and intensive agriculture. At the heart of the HGT-driven bacterial evolution and adaptation are highly sophisticated natural genetic engineering tools in the form of a variety of mobile genetic elements (MGEs. The main aim of this review is to give a brief account of the occurrence and diversity of MGEs in natural ecosystems and of the environmental factors that may affect MGE-mediated HGT.

  3. Modelling the horizontal steam generator with APROS

    Energy Technology Data Exchange (ETDEWEB)

    Ylijoki, J. [VTT Energy, Espoo (Finland); Palsinajaervi, C.; Porkholm, K. [IVO International Ltd, Vantaa (Finland)

    1995-12-31

    In this paper the capability of the five- and six-equation models of the simulation code APROS to simulate the behaviour of the horizontal steam generator is discussed. Different nodalizations are used in the modelling and the results of the stationary state runs are compared. Exactly the same nodalizations have been created for the five- and six-equation models. The main simulation results studied in this paper are void fraction and mass flow distributions in the secondary side of the steam generator. It was found that quite a large number of simulation volumes is required to simulate the distributions with a reasonable accuracy. The simulation results of the different models are presented and their validity is discussed. (orig.). 4 refs.

  4. Horizontal Gene Transfer, Dispersal and Haloarchaeal Speciation

    Directory of Open Access Journals (Sweden)

    R. Thane Papke

    2015-05-01

    Full Text Available The Halobacteria are a well-studied archaeal class and numerous investigations are showing how their diversity is distributed amongst genomes and geographic locations. Evidence indicates that recombination between species continuously facilitates the arrival of new genes, and within species, it is frequent enough to spread acquired genes amongst all individuals in the population. To create permanent independent diversity and generate new species, barriers to recombination are probably required. The data support an interpretation that rates of evolution (e.g., horizontal gene transfer and mutation are faster at creating geographically localized variation than dispersal and invasion are at homogenizing genetic differences between locations. Therefore, we suggest that recurrent episodes of dispersal followed by variable periods of endemism break the homogenizing forces of intrapopulation recombination and that this process might be the principal stimulus leading to divergence and speciation in Halobacteria.

  5. Horizontal gene transfer, dispersal and haloarchaeal speciation.

    Science.gov (United States)

    Papke, R Thane; Corral, Paulina; Ram-Mohan, Nikhil; Haba, Rafael R de la; Sánchez-Porro, Cristina; Makkay, Andrea; Ventosa, Antonio

    2015-05-19

    The Halobacteria are a well-studied archaeal class and numerous investigations are showing how their diversity is distributed amongst genomes and geographic locations. Evidence indicates that recombination between species continuously facilitates the arrival of new genes, and within species, it is frequent enough to spread acquired genes amongst all individuals in the population. To create permanent independent diversity and generate new species, barriers to recombination are probably required. The data support an interpretation that rates of evolution (e.g., horizontal gene transfer and mutation) are faster at creating geographically localized variation than dispersal and invasion are at homogenizing genetic differences between locations. Therefore, we suggest that recurrent episodes of dispersal followed by variable periods of endemism break the homogenizing forces of intrapopulation recombination and that this process might be the principal stimulus leading to divergence and speciation in Halobacteria.

  6. Horizontal gene transfer in eukaryotic plant pathogens.

    Science.gov (United States)

    Soanes, Darren; Richards, Thomas A

    2014-01-01

    Gene transfer has been identified as a prevalent and pervasive phenomenon and an important source of genomic innovation in bacteria. The role of gene transfer in microbial eukaryotes seems to be of a reduced magnitude but in some cases can drive important evolutionary innovations, such as new functions that underpin the colonization of different niches. The aim of this review is to summarize published cases that support the hypothesis that horizontal gene transfer (HGT) has played a role in the evolution of phytopathogenic traits in fungi and oomycetes. Our survey of the literature identifies 46 proposed cases of transfer of genes that have a putative or experimentally demonstrable phytopathogenic function. When considering the life-cycle steps through which a pathogen must progress, the majority of the HGTs identified are associated with invading, degrading, and manipulating the host. Taken together, these data suggest HGT has played a role in shaping how fungi and oomycetes colonize plant hosts.

  7. Realidad e interés. El horizonte de la filosofía kantiana

    OpenAIRE

    Jacinto null

    2005-01-01

    Se delinea el horizonte de la filosofía kantiana y su modo de pensar tomando como hilo conductor los intereses racionales y los diversos tipos de realidad que ellos nos hacen comprender. El interés teórico sólo llega a lo fenoménico e instrumental, a lo cósico. Es el interés de la razón práctica el que llega más lejos, hasta la realidad en sí, dibujando el ámbito supremo de realidad y de posibilidad en el modo de ser de la acción, del deber, pero también el de la esperanza. Por último, el int...

  8. Horizontal gene transfer in evolution: facts and challenges

    OpenAIRE

    Boto, Luis

    2009-01-01

    The contribution of horizontal gene transfer to evolution has been controversial since it was suggested to be a force driving evolution in the microbial world. In this paper, I review the current standpoint on horizontal gene transfer in evolutionary thinking and discuss how important horizontal gene transfer is in evolution in the broad sense, and particularly in prokaryotic evolution. I review recent literature, asking, first, which processes are involved in the evolutionary success of tran...

  9. Capillary-contacting horizontal cells in the rodent retina

    OpenAIRE

    Mojumder, Deb Kumar

    2008-01-01

    Horizontal cells, the interneurons in the distal retina, provide feedback control of the photoreceptor synaptic output at the first synapse in the visual pathway. This article, using immunohistological and confocal microscopy techniques, presents anatomical evidence that in rat and mouse retina, the horizontal cell processes are in contact with retinal capillaries as are retinal glial cells. This glia-like property of horizontal cells in these two species, also previously reported in tree shr...

  10. Estrutura e organização do trabalho infantil em situação de rua em Belo Horizonte, MG, Brasil Structure and organization of children's work on the streets in Belo Horizonte, MG, Brazil

    Directory of Open Access Journals (Sweden)

    Maria Núbia Alves Cruz

    2008-03-01

    Full Text Available Este artigo analisa a estrutura e as práticas de trabalho infantil em situação de rua, focalizando as estratégias e o papel das famílias. O método utilizado combina técnicas de observação da atividade, entrevistas simultâneas e entrevistas fora do local da atividade. As categorias de interesse para responder à hipótese do estudo foram organizadas, classificadas e analisadas por meio de cartas temáticas. Os resultados mostram a influência das famílias e da comunidade na execução das atividades e a mobilização de estratégias, visando alcançar os objetivos de trabalho. Esse comportamento expressa a aceitação e a participação familiar e da sociedade na estruturação do trabalho infantil. Porém a exposição à violência não é minimizada pela participação dos genitores, tampouco pela constituição de uma suposta rede de solidariedade. Não se vislumbram possibilidades educativas, dadas as condições de trabalho, incompatíveis com a idade dos sujeitos.This article analyses the organization and work practices of subjects enrolled in public programs of income transfer, focusing on the strategies developed and on the role of families in placing children and adolescents in street jobs. The qualitative method that was used applied activity observation techniques combined with simultaneous and outside work interviews. Narrative analysis was used based on categories of interest defined to answer the study hypothesis. The results show that there is a direct influence of families and the community on the performance of the activities and that the groups mobilize strategies to achieve their aims. This behavior expresses that the family and society accept and participate in the organization of children's work on the street. However, exposure to violence is not diminished by parents' participation nor by the constitution of a supposed solidarity network. Educational possibilities are not anticipated due to the work conditions, which are incompatible with the subjects' age.

  11. Renal nerves and nNOS

    DEFF Research Database (Denmark)

    Kompanowska-Jezierska, Elzbieta; Wolff, Helle; Kuczeriszka, Marta

    2008-01-01

    It was hypothesized that renal sympathetic nerve activity (RSNA) and neuronal nitric oxide synthase (nNOS) are involved in the acute inhibition of renin secretion and the natriuresis following slow NaCl loading (NaLoad) and that RSNA participates in the regulation of arterial blood pressure (MABP......). This was tested by NaLoad after chronic renal denervation with and without inhibition of nNOS by S-methyl-thiocitrulline (SMTC). In addition, the acute effects of renal denervation on MABP and sodium balance were assessed. Rats were investigated in the conscious, catheterized state, in metabolic cages...... of acutely and chronically denervated rats were less than control (15% and 9%, respectively, P renal denervation (14.5 +/- 0.2 vs. 19.3 +/- 1.3 mIU/l, P

  12. Editorial - O que nos (pre)ocupa?

    OpenAIRE

    Palmeirim, Madalena Manzoni

    2012-01-01

    Todo o gesto artístico é, em certa medida, um acto político. O contrário torna-se cada vez mais difícil de afirmar. Neste Portugal que se encontra nas mãos de um corpo político sem voz cultural, as decisões que nos são impostas ultrapassam a tão necessária condição de austeridade para fundarem um estado catatónico, onde a cultura é vista como uma exigência caprichosa, supérflua e desnecessária. É precisamente o esvaziamento de criatividade na retórica política que nos impede de...

  13. ¿Las emociones nos distraen?

    Directory of Open Access Journals (Sweden)

    Antonia Pilar Pacheco-Unguetti

    2014-06-01

    Full Text Available ¿Leerás este artículo hasta el final sin interrupciones? Puede que, mientras lo intentas, recibas algún mensaje de whatsapp, se abra una ventana emergente en tu ordenador con una oferta de viajes al Caribe o el cartero llame dos veces a tu puerta. También puede ser que simplemente no tengas un buen día y te resulte especialmente difícil concentrarte. Vivimos expuestos a multitud de estímulos distractores externos, algunos tan inesperados o extraños que entorpecen irremediablemente nuestra concentración en una tarea (distracción por novedad. Pero la distracción también puede tener una causa interna y cómo nos sentimos puede influir en cuánto nos distraemos.

  14. Characterizing local variability in long‐period horizontal tilt noise

    Science.gov (United States)

    Rohde, M.D.; Ringler, Adam; Hutt, Charles R.; Wilson, David; Holland, Austin; Sandoval, L.D; Storm, Tyler

    2017-01-01

    Horizontal seismic data are dominated by atmospherically induced tilt noise at long periods (i.e., 30 s and greater). Tilt noise limits our ability to use horizontal data for sensitive seismological studies such as observing free earth modes. To better understand the local spatial variability of long‐period horizontal noise, we observe horizontal noise during quiet time periods in the Albuquerque Seismological Laboratory (ASL) underground vault using four small‐aperture array configurations. Each array comprises eight Streckeisen STS‐2 broadband seismometers. We analyze the spectral content of the data using power spectral density and magnitude‐squared coherence (γ2‐coherence). Our results show a high degree of spatial variability and frequency dependence in the long‐period horizontal wavefield. The variable nature of long‐period horizontal noise in the ASL vault suggests that it might be highly local in nature and not easily characterized by simple physical models when overall noise levels are low, making it difficult to identify locations in the vault with lower horizontal noise. This variability could be limiting our ability to apply coherence analysis for estimating horizontal sensor self‐noise and could also complicate various indirect methods for removing long‐period horizontal noise (e.g., collocated rotational sensor or microbarograph).

  15. The Impact of Horizontal Mergers on Competition: A Literature Survey

    Directory of Open Access Journals (Sweden)

    Sevilay SARICA

    2012-06-01

    Full Text Available A large number of studies have been devoted to the effects of horizontal mergers on competition. This survey intends to review some selected studies about the effects of competition on horizontal mergers with a special attention given the horizontal integration. One of the important results obtained from this literature survey is that the findings of many researches have largely been controversial due to the different approaches and the time periods used in their studies. In these studies, even though it has been proved that horizontal mergers have negative effects on competition, it is not possible to make any precise comment on the dimension of this effect.

  16. Cuttings Transport Models and Experimental Visualization of Underbalanced Horizontal Drilling

    Directory of Open Access Journals (Sweden)

    Na Wei

    2013-01-01

    Full Text Available Aerated underbalanced horizontal drilling technology has become the focus of the drilling industry at home and abroad, and one of the engineering core issues is the horizontal borehole cleaning. Therefore, calculating the minimum injection volume of gas and liquid accurately is essential for the construction in aerated underbalanced horizontal drilling. This paper establishes a physical model of carrying cuttings and borehole cleaning in wellbore of horizontal well and a critical transport mathematical model according to gas-liquid-solid flow mechanism and large plane dunes particle transport theory.

  17. Lusin approximation for horizontal curves in step 2 Carnot groups

    OpenAIRE

    Donne, Enrico Le; Speight, Gareth

    2016-01-01

    A Carnot group $\\mathbb{G}$ admits Lusin approximation for horizontal curves if for any absolutely continuous horizontal curve $\\gamma$ in $\\mathbb{G}$ and $\\varepsilon>0$, there is a $C^1$ horizontal curve $\\Gamma$ such that $\\Gamma=\\gamma$ and $\\Gamma'=\\gamma'$ outside a set of measure at most $\\varepsilon$. We verify this property for free Carnot groups of step 2 and show that it is preserved by images of Lie group homomorphisms preserving the horizontal layer. Consequently, all step 2 Car...

  18. Misdirected horizontal saccades in pan-cerebellar atrophy.

    Science.gov (United States)

    Shaikh, Aasef G; Ghasia, Fatema F

    2015-08-15

    Saccadic dysmetria is a sensitive marker of cerebellar dysfunction. We discovered misdirected horizontal saccades due to cross-coupled orthogonal (vertical) saccades in siblings with pan-cerebellar atrophy. There was an upward drift in vertical eye position after each cross-coupled downward saccade. Such drifts brought the eyes back to the desired target. Due to strong upward bias, downward compensatory slow movements did not follow cross-coupled upward saccades. There was minimal horizontal cross-coupling associated with vertical saccades. There was a reduced gain of horizontal pursuit causing lag in the horizontal eye movement and subsequent catch-up horizontal saccades. The horizontal catch-up saccades were also associated with vertical cross-coupled eye movements and subsequent drifts. There was no cross-coupling of pursuit eye movements. Our results support the hypothesis emphasizing adaptive cerebellar control of saccade direction. Commands for horizontal saccades trigger not only the activity of the horizontal burst generators, but also the vertical burst neurons. The activity of orthogonal (vertical) burst neurons is canceled by opposing signals under cerebellar supervision. Cerebellar lesions could disrupt such balance between opposing orthogonal signals leading to vertical cross-coupling during horizontal saccade. We speculate that upward drift might result from an imbalance in opposing orthogonal signals at the level of neural integrators. Copyright © 2015 Elsevier B.V. All rights reserved.

  19. ¿Comer carne nos hizo inteligentes?

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Marmelada

    2007-12-01

    Full Text Available La inteligencia abstracta es lo que más nos diferencia de los restantes animales. Su origen continúa siendo un misterio sujeto a debate. Hay quienes afirman que emergió paulatinamente. En este sentido se ha propuesto que incorporar la carne a la dieta de los homínidos pudo haber sido el detonante que la hizo surgir. Pero esta hipótesis tiene sus lagunas.

  20. Quando e onde se acidentam e morrem os motociclistas em Belo Horizonte, Minas Gerais, Brasil

    Directory of Open Access Journals (Sweden)

    Eugênio Paceli Hatem Diniz

    2015-12-01

    Full Text Available Resumo O objetivo foi analisar a tendência dos acidentes de transporte terrestre com motociclistas em Belo Horizonte, Minas Gerais, Brasil, de 2007 a 2011, e identificar aglomerados e interseções das vias públicas de maior risco. Foram utilizadas as bases de dados da Polícia Militar e do Serviço de Atendimento Móvel de Urgência (SAMU. Para identificar as interseções críticas foram calculadas as taxas de severidade dos acidentes. Utilizou-se duas técnicas de estatística espacial para analisar os aglomerados de acidentes: análise de kernel e estatística Scan (modelo de Poisson contínuo. Os aglomerados de risco de acidentes foram detectados na Região Central e nos corredores de tráfego. O risco de acidentes, inclusive fatais, foi maior em segmentos que nas interseções. As interseções críticas são rotas de acesso para as regiões da Grande Belo Horizonte. As taxas de mortalidade e de acidentes apresentaram duas tendências distintas. Além disso, a maioria dos óbitos ocorreu à noite. Justifica-se a importância da melhoria das rotas para os motociclistas e do transporte público.

  1. Competências Profissionais: Um Estudo com Gestores do Varejo de Moda do “Barro Preto” - Belo Horizonte (MG

    Directory of Open Access Journals (Sweden)

    Nicolai, Érika Fortes Perdigão

    2012-12-01

    Full Text Available The aim of this study is to describe and analyze how the managerial competences are configured and managed in the retail sector of Barro Preto’s fashion district in managers and other sales team members’ perception. In order to accomplish this, we took into account Paiva’s competence model (Paiva, 2007. The field research was characterized as a descriptive case study, with a qualitative approach. The data were collected through documentation survey and analysis and by interviews. The subjects were chosen using accessibility and convenience criteria. The data collected were organized, processed and analyzed by the technique of content analysis. Subsequently, the demographic and functional data of respondents were presented. For most of the inverviewees, the notion of competence is linked to action; they are aware that managers occupy a middle ground in the organizational hierarchy and that they work in an environment known by ambiguity, contradictions and demands. So, to be competent managers, interviewees attested the need for academic training, while considering the importance of experience. This study suggests the importance of informal learning in the managers’ competences training and development, especially through the figure of the "model manager"; in other words, the one that is considered the mirror to the other members of the sales team. Finally, limitations of this study and suggestions for further research were pointed out.

  2. BTEX removal in a horizontal-flow anaerobic immobilized biomass reactor under denitrifying conditions.

    Science.gov (United States)

    Ribeiro, Rogers; de Nardi, Ivana Ribeiro; Fernandes, Bruna Soares; Foresti, Eugenio; Zaiat, Marcelo

    2013-04-01

    Because benzene, toluene, ethylbenzene, and xylenes (BTEX) and ethanol are important contaminants present in Brazilian gasoline, it is essential to develop technology that can be used in the bioremediation of gasoline-contaminated aquifers. This paper evaluates the performance of a horizontal-flow anaerobic immobilized biomass (HAIB) reactor fed with water containing gasoline constituents under denitrifying conditions. Two HAIB reactors filled with polyurethane foam matrices (5 mm cubes, 23 kg/m(3) density and 95 % porosity) for biomass attachment were assayed. The reactor fed with synthetic substrate containing protein, carbohydrates, sodium bicarbonate and BTEX solution in ethanol, at an Hydraulic retention time (HRT) of 13.5 h, presented hydrocarbon removal efficiencies of 99 % at the following initial concentrations: benzene 6.7 mg/L, toluene 4.9 mg/L, m-xylene and p-xylene 7.2 mg/L, ethylbenzene 3.7 mg/L, and nitrate 60 mg N/L. The HAIB reactor fed with gasoline-contaminated water at an HRT of 20 h showed hydrocarbon removal efficiencies of 96 % at the following initial concentrations: benzene, 4.9 mg/L; toluene, 7.2 mg/L; m-xylene, 3.7 mg/L; and nitrate 400 mg N/L. Microbiological observations along the length of the HAIB reactor fed with gasoline-contaminated water confirmed that in the first segment of the reactor, denitrifying metabolism predominated, whereas from the first sampling port on, the metabolism observed was predominantly methanogenic.

  3. Antibiotics and common antibacterial biocides stimulate horizontal transfer of resistance at low concentrations.

    Science.gov (United States)

    Jutkina, J; Marathe, N P; Flach, C-F; Larsson, D G J

    2018-03-01

    There is a rising concern that antibiotics, and possibly other antimicrobial agents, can promote horizontal transfer of antibiotic resistance genes. For most types of antimicrobials their ability to induce conjugation below minimal inhibitory concentrations (MICs) is still unknown. Our aim was therefore to explore the potential of commonly used antibiotics and antibacterial biocides to induce horizontal transfer of antibiotic resistance. Effects of a wide range of sub-MIC concentrations of the antibiotics cefotaxime, ciprofloxacin, gentamicin, erythromycin, sulfamethoxazole, trimethoprim and the antibacterial biocides chlorhexidine digluconate, hexadecyltrimethylammoniumchloride and triclosan were investigated using a previously optimized culture-based assay with a complex bacterial community as a donor of mobile resistance elements and a traceable Escherichia coli strain as a recipient. Chlorhexidine (24.4μg/L), triclosan (0.1mg/L), gentamicin (0.1mg/L) and sulfamethoxazole (1mg/L) significantly increased the frequencies of transfer of antibiotic resistance whereas similar effects were not observed for any other tested antimicrobial compounds. This corresponds to 200 times below the MIC of the recipient for chlorhexidine, 1/20 of the MIC for triclosan, 1/16 of the MIC for sulfamethoxazole and right below the MIC for gentamicin. To our best knowledge, this is the first study showing that triclosan and chlorhexidine could stimulate the horizontal transfer of antibiotic resistance. Together with recent research showing that tetracycline is a potent inducer of conjugation, our results indicate that several antimicrobials including both common antibiotics and antibacterial biocides at low concentrations could contribute to antibiotic resistance development by facilitating the spread of antibiotic resistance between bacteria. Copyright © 2017 Elsevier B.V. All rights reserved.

  4. Horizontal mantle flow controls subduction dynamics.

    Science.gov (United States)

    Ficini, E; Dal Zilio, L; Doglioni, C; Gerya, T V

    2017-08-08

    It is generally accepted that subduction is driven by downgoing-plate negative buoyancy. Yet plate age -the main control on buoyancy- exhibits little correlation with most of the present-day subduction velocities and slab dips. "West"-directed subduction zones are on average steeper (~65°) than "East"-directed (~27°). Also, a "westerly"-directed net rotation of the lithosphere relative to the mantle has been detected in the hotspot reference frame. Thus, the existence of an "easterly"-directed horizontal mantle wind could explain this subduction asymmetry, favouring steepening or lifting of slab dip angles. Here we test this hypothesis using high-resolution two-dimensional numerical thermomechanical models of oceanic plate subduction interacting with a mantle flow. Results show that when subduction polarity is opposite to that of the mantle flow, the descending slab dips subvertically and the hinge retreats, thus leading to the development of a back-arc basin. In contrast, concordance between mantle flow and subduction polarity results in shallow dipping subduction, hinge advance and pronounced topography of the overriding plate, regardless of their age-dependent negative buoyancy. Our results are consistent with seismicity data and tomographic images of subduction zones. Thus, our models may explain why subduction asymmetry is a common feature of convergent margins on Earth.

  5. Yaw dynamics of horizontal axis wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, A.C. (Utah Univ., Salt Lake City, UT (United States))

    1992-05-01

    Designers of a horizontal axis wind turbine yaw mechanism are faced with a difficult decision. They know that if they elect to use a yaw- controlled rotor then the system will suffer increased initial cost and increased inherent maintenance and reliability problems. On the other hand, if they elect to allow the rotor to freely yaw they known they will have to account for unknown and random, though bounded, yaw rates. They will have a higher-risk design to trade-off against the potential for cost savings and reliability improvement. The risk of a yaw-free system could be minimized if methods were available for analyzing and understanding yaw behavior. The complexity of yaw behavior has, until recently, discouraged engineers from developing a complete yaw analysis method. The objectives of this work are to (1) provide a fundamental understanding of free-yaw mechanics and the design concepts most effective at eliminating yaw problems, and (2) provide tested design tools and guidelines for use by free-yaw wind systems manufacturers. The emphasis is on developing practical and sufficiently accurate design methods.

  6. Bubble growth in a narrow horizontal space

    Energy Technology Data Exchange (ETDEWEB)

    Stutz, Benoit; Goulet, Remi [CETHIL, UMR5008, CNRS, INSA-Lyon, Universite Lyon1 (France); Passos, Julio Cesar [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica. LABSOLAR

    2009-07-01

    The purpose of this work is to develop an axis-symmetric two-phase flow model describing the growth of a single bubble squeezed between a horizontal heated upward-facing disc and an insulating surface placed parallel to the heated surface. Heat transfers at the liquid-vapour interfaces are predicted by the kinetic limit of vaporisation. The depths of the liquid films deposed on the surfaces (heated surface and confinement space) are determined using the Moriyama and Inoue correlation (1996). Transient heat transfers within the heated wall are taken into account. The model is applied to pentane bubble growth. The influence of the gap size, the initial temperature of the system, the thermal effusivity of the heated wall and the kinetic limit of vaporisation are studied. The results show that the expansion of the bubbles strongly depends on the gap size and can be affected by the effusivity of the material. Mechanical inertia effects are mainly dominant at the beginning of the bubble expansion. Pressure drop induced by viscous effects have to be taken into account for high capillary numbers. Heat transfers at the meniscus are negligible except at the early stages of the bubble growth. (author)

  7. Horizontal Shear Wave Imaging of Large Optics

    Energy Technology Data Exchange (ETDEWEB)

    Quarry, M J

    2007-09-05

    When complete the National Ignition Facility (NIF) will be the world's largest and most energetic laser and will be capable of achieving for the first time fusion ignition in the laboratory. Detecting optics features within the laser beamlines and sizing them at diameters of 0.1 mm to 10 mm allows timely decisions concerning refurbishment and will help with the routine operation of the system. Horizontally polarized shear waves at 10 MHz were shown to accurately detect, locate, and size features created by laser operations from 0.5 mm to 8 mm by placing sensors at the edge of the optic. The shear wave technique utilizes highly directed beams. The outer edge of an optic can be covered with shear wave transducers on four sides. Each transducer sends a pulse into the optic and any damage reflects the pulse back to the transmitter. The transducers are multiplexed, and the collected time waveforms are enveloped and replicated across the width of the element. Multiplying the data sets from four directions produces a map of reflected amplitude to the fourth power, which images the surface of the optic. Surface area can be measured directly from the image, and maximum depth was shown to be correlated to maximum amplitude of the reflected waveform.

  8. Horizontal transfer of diatomaceous earth and botanical insecticides in the common bed bug, Cimex lectularius L.; hemiptera: cimicidae.

    Directory of Open Access Journals (Sweden)

    Yasmin Akhtar

    Full Text Available BACKGROUND: Horizontal transfer of insecticide occurs when insects contact or ingest an insecticide, return to an aggregation or a nest, and transfer the insecticide to other conspecific insects through contact. This phenomenon has been reported in a number of insects including social insects, however it has not been reported in bed bugs. Since horizontal transfer can facilitate the spread of insecticide into hard to reach spaces, it could contribute greatly to the management of these public health pests. METHODOLOGY/RESULTS: To demonstrate horizontal transfer of diatomaceous earth and botanical insecticides in C. lectularius, an exposed (donor bed bug, following a 10-minute acquisition period, was placed with unexposed (recipient bed bugs. Mortality data clearly demonstrates that diatomaceous earth (DE 51 was actively transferred from a single exposed bug to unexposed bugs in a concentration dependent manner. LC50 values varied from 24.4 mg at 48 h to 5.1 mg at 216 h when a single exposed bed bug was placed with 5 unexposed bed bugs. LT50 values also exhibited a concentration response. LT50 values varied from 1.8 days to 8.4 days when a 'donor' bug exposed to 20 and 5 mg of dust respectively was placed with 5 'recipient' bugs. Dust was also actively transferred from adult bed bugs to the nymphs. In addition we observed horizontal transfer of botanical insecticides including neem, ryania, and rotenone to varying degrees. CONCLUSION/SIGNIFICANCE: Our data clearly demonstrate horizontal transfer of diatomaceous earth and botanical insecticides in the common bed bug, C. lectularius. Use of a fluorescent dust provided visual confirmation that contaminated bed bugs transfer dust to untreated bed bugs in harborage. This result is important because bedbugs live in hard-to-reach places and interaction between conspecifics can be exploited for delivery and dissemination of management products directed at this public health pest.

  9. Towards a new natural theology based on horizontal transcendence ...

    African Journals Online (AJOL)

    As a result the article rejects absolute transcendence, replacing it with a horizontal transcendence that accords with humans' biological makeup and with presentday scientifi c thinking. In the framework of horizontal transcendence the pivotal problem of the human condition is no longer death, but life. This has radical ...

  10. The Interplay of Different Types of Governance in Horizontal Cooperations

    DEFF Research Database (Denmark)

    Raue, Jan Simon; Wieland, Andreas

    2015-01-01

    Purpose – Over the last decades, horizontal cooperations between logistics service providers (LSPs) have become a well-established organizational form and their use is expected to grow even further in the future. In spite of this increasing importance of horizontal LSP cooperations, little research...

  11. Horizontal cooperation in transport and logistics : A literature review

    NARCIS (Netherlands)

    Cruijssen, Frans; Dullaert, Wout; Fleuren, Hein

    This article presents a broad review of horizontal cooperation in transport and logistics. This topic is fast gaining momentum in the logistics sector and is thus highly relevant from a practical point of view. Moreover, horizontal cooperation is also interesting from a theoretical perspective

  12. Horizontal Cooperation in Transport and Logistics: A Literature Review

    NARCIS (Netherlands)

    Cruijssen, Frans; Dullaert, Wout; Fleuren, Hein

    2007-01-01

    This article presents a broad review of horizontal cooperation in transport and logistics. This topic is fast gaining momentum in the logistics sector and is thus highly relevant from a practical point of view. Moreover, horizontal cooperation is also interesting from a theoretical perspective

  13. District Power Equalization, Horizontal Equity and the Property Mix.

    Science.gov (United States)

    Hilley, John

    1980-01-01

    Argues that the traditional district power equalization (DPE) grant formula achieves horizontal equity, that the formula must be modified when the measure of fiscal capacity differs from the legal tax base, and that the inclusion of a tax exporting variable leads to the breakdown of horizontal equity. (Author/IRT)

  14. Processing woody biomass with a modified horizontal grinder

    Science.gov (United States)

    Dana Mitchell; John Klepac

    2008-01-01

    This study documents the production rate and cost of producing woody biomass chips for use in a power plant. The power plant has specific raw material handling requirements. Output from a 3-knife chipper, a tub grinder, and a horizontal grinder was considered. None of the samples from these machines met the specifications needed. A horizontal grinder was modified to...

  15. Investigation of blade performance of horizontal axis wind turbine ...

    African Journals Online (AJOL)

    The shape of rotor blade plays an important role in determining the overall aerodynamic performance of a horizontal axis wind turbine. In this work, blade is designed for a 5KW horizontal axis wind turbine which is already in market. For designing blade, blade element momentum theory (BEMT) is used and a computer ...

  16. Artificial remisión de V. horizonte artificial.

    OpenAIRE

    2011-01-01

    [ES] Definición del término Artificial remisión de V. horizonte artificial. en el diccionario Dicter. [EN] Definition of the word Artificial remisión de V. horizonte artificial. in the dictionary Dicter.

  17. Pure shear horizontal SAW biosensor on langasite.

    Science.gov (United States)

    Berkenpas, Eric; Bitla, Shivashanker; Millard, Paul; da Cunha, Mauricio Pereira

    2004-11-01

    The undetected introduction of pathogens into food or water supplies can produce grave consequences in terms of economic loss and human suffering. Sensitive and selective sensors capable of quickly detecting microbial pathogens are urgently needed to limit the effects of bioterrorist incidents, accidents, or pollution. Shear horizontal surface acoustic wave (SH SAW) devices provide an attractive platform for the design of microbial biosensors that function in liquid media, where Rayleigh-type modes are rapidly attenuated. This paper reports on an exploratory SH SAW delay line designed and fabricated on langasite, La3Ga5SiO14 (LGS), along the novel Euler propagation direction (0 degrees, 22 degrees, 90 degrees). A liquid chamber was fabricated and attached to the top surface, and the device was submitted to liquid and biochemical tests. Moderate (6 dB) additional attenuation of the transmission coefficient, /S21/, was consistently observed when the SH SAW delay line was assembled in the test fixture and submitted to the liquid tests, indicating that LGS is an attractive candidate for liquid sensing. Sensor selectivity can be achieved by integrating the LGS SH SAW delay line with a biochemical recognition layer. A test setup was implemented for the characterization of LGS SH SAW-based biosensors. The delay line response to biomolecule binding was shown by detection of sequential binding of proteins to the SH SAW device delay path. The biotinylated sensor was exposed sequentially to biotin-binding deglycosylated avidin, biotin-modified rabbit IgG, and goat anti-rabbit IgG antibody. As each protein was bound to the sensing surface, marked changes in the delay-line phase were recorded. The reported results demonstrate the capability of these devices to act as biochemical detectors in aqueous solutions, and this work represents the first effort using the novel material LGS in SAW-based biosensor technology.

  18. Simulations and scaling of horizontal convection

    Directory of Open Access Journals (Sweden)

    Mehmet ILIcak

    2012-05-01

    Full Text Available In this paper we describe the results of various numerical simulations of sideways or horizontal convection. Specifically, a two-dimensional Boussinesq fluid is both heated and cooled from its upper surface, but the walls and the bottom of the tank are insulating and have no flux of heat through them. We perform experiments with a range of Rayleigh numbers up to 1011, obtained by systematically reducing the diffusivity. We also explore the effects of a nonlinear equation of state and of a mechanical force imposed on the top surface at a fixed Rayleigh number. We find that, when there is no mechanical forcing, both the energy dissipation and the strength of the circulation itself monotonically fall with decreasing diffusivity. At Rayleigh numbers greater than 1010 the flow is unsteady; however, the eddying flow is still much weaker than the steady flow at smaller Rayleigh numbers. At high Rayleigh numbers, the stratification and the mean circulation are increasingly confined to a thin layer at the upper surface, with the layer thickness decreasing according to Ra−1/5. There is no evidence that the flow ever enters a regime that is independent of Rayleigh number. Using a nonlinear equation of state makes little difference to the flow phenomenology at a moderate Rayleigh number. The addition of an imposed stress at the upper surface makes a significant difference in the flow. A strong, energy-dissipating circulation can be maintained even at Ra = 109, and the stratification extends more deeply into the fluid than in the unstressed case. Overall, our results are consistent with the notion that in the absence of mechanical forcing a fluid that is heated and cooled from above cannot maintain a deep stratification or a strong sustained flow at high Rayleigh numbers, even if the interior flow is unsteady.

  19. Pobreza infantil nos paises ricos 2005

    OpenAIRE

    *UNICEF

    2006-01-01

    Este estudo de 2005 sobre pobreza infantil nos países ricos conclui que a percentagem de crianças pobres no mundo desenvolvido aumentou em 17 dos 24 países da OCDE para os quais existem dados. Independentemente do instrumento aplicado para medir a pobreza, a situação das crianças parece ter-se deteriorado ao longo da última década. A redução da pobreza infantil é uma medida do progresso no sentido da coesão social, da igualdade de oportunidades e do investimento nas crianças de hoje e no mund...

  20. Performance of a Direct Horizontal Roughing Filtration (DHRF System in Treatment of Highly Turbid Water

    Directory of Open Access Journals (Sweden)

    A H Mahvi, M Ahmadi Moghaddam, S Nasseri, K Naddafi

    2004-07-01

    Full Text Available Vertical or horizontal flow gravel beds can be used in water treatment as roughing filters. In order to improve the performance of horizontal flow roughing filtration (HRF this process has been modified earlier by applying a constant coagulant dose prior to filtration named direct horizontal roughing filtration (DHRF. In this research a lab scale DHRF pilot plant was used for investigate DHRF performance. The study results indicated that DHRF (6.5 m long consisting of 2.5 m first compartment with 12-18 mm diameter grain, 2 m/s compartment with 8-12 mm diameter and 1.5m third compartment with 4-8 mm diameter was systematically yielded good effluent quality (<2NTU, C.I=0.95 with raw water quality of 200-400 NTU. DHRF is a versatile pretreatment process capable of handling wide fluctuation in raw water turbidity (200-400 NTU while operating condition such as coagulant dose [2mg Fe (III/L], mixing intensity, time and filtration rate remained unchangeable.

  1. Effects of quercetin on apoptosis, NF-κB and NOS gene expression in renal ischemia/reperfusion injury

    Science.gov (United States)

    KINACI, M. KENAN; ERKASAP, NILUFER; KUCUK, AYSEGUL; KOKEN, TULAY; TOSUN, MURAT

    2012-01-01

    The aim of this study was to investigate the effects of quercetin on nitric oxide synthase (NOS), nuclear factor-κB (NF-κB) and apoptosis in renal ischemia/reperfusion (I/R) injury in rats. A total of 42 Sprague-Dawley rats were divided into three groups. The control, I/R and I/R+quercetin (I/R+Q) groups were treated with quercetin (50 mg/kg intraperitoneal) 1 h prior to the induction of ischemia. Tissue malondialdehyde (MDA) and glutathione (GSH) levels were determined by high-performance liquid chromatography (HPLC). p53, endothelial NOS (eNOS) and NF-κB expression were assessed immunohistochemically, and apoptosis assesment was performed using terminal deoxynucleotidyl transferase dUTP nick end-labeling (TUNEL) assay. The mRNA levels of inducible NOS (iNOS) in renal tissue were determined by real-time polymerase chain reaction (RT-PCR). MDA levels were significantly decreased in the quercetin group compared to the I/R group. However, GSH levels were significantly increased with quercetin treatment in the I/R group. Histological results, the number of apoptotic and p53-positive cells, NF-κB and eNOS expression levels were significantly decreased in the quercetin treatment group compared to the I/R group. iNOS gene expression increased in the I/R group, but no significant difference was found between the I/R and quercetin treatment groups. Therefore, quercetin not only has antioxidant and anti-apoptotic activities, but also has an inhibitory effect on eNOS and NF-κB for renal tissue protection during I/R injury in rats. Therefore, quercetin may be a promising renoprotective therapeutic agent. PMID:22969877

  2. Horizontal oil well applications and oil recovery assessment. Volume 1: Success of horizontal well technology, Final report

    Energy Technology Data Exchange (ETDEWEB)

    Deskins, W.G.; McDonald, W.J.; Knoll, R.G.; Springer, S.J.

    1995-03-01

    Horizontal technology has been applied in over 110 formations in the USA. Volume I of this study addresses the overall success of horizontal technology, especially in less-publicized formations, i.e., other than the Austin Chalk, Bakken, and Niobrara. Operators in the USA. and Canada were surveyed on a formation-by-formation basis by means of a questionnaire. Response data were received describing horizontal well projects in 58 formations in the USA. and 88 in Canada. Operators responses were analyzed for trends in technical and economic success based on lithology (clastics and carbonates) and resource type (light oil, heavy oil, and gas). The potential impact of horizontal technology on reserves was also estimated. A forecast of horizontal drilling activity over the next decade was developed.

  3. 355301 3, Nos. l & 2, 1997.

    African Journals Online (AJOL)

    the lower slopes of the plantations had a higher organic carbon ' contents ... P, 82.13 mg/kg, organic carbon, 2.59% and mg, 2.42 Cmol kg—l, when .... erosion along the toposequence. Stoop slope as a result of the washing down the slope of sand which now makies soils of the lower slope to become deeper than those iof.

  4. Nitric oxide pathway genes (NOS1AP and NOS1) are involved in PTSD severity, depression, anxiety, stress and resilience.

    Science.gov (United States)

    Bruenig, Dagmar; Morris, Charles P; Mehta, Divya; Harvey, Wendy; Lawford, Bruce; Young, Ross McD; Voisey, Joanne

    2017-08-20

    The nitric oxide pathway in the hippocampus is involved in the biological stress response with detrimental consequences to cells and HPA axis feedback. Hippocampal atrophy and HPA axis feedback dysfunction are associated with posttraumatic stress disorder (PTSD). This study systematically investigates two genes of the nitric oxide pathway NOS1AP and NOS1 for a potential involvement in PTSD, comorbidities and resilience. A cohort of age and gender matched Vietnam veterans including trauma-exposed cases and controls was recruited and comprehensively assessed (n=299). A total of 49 NOS1AP and 16 NOS1 polymorphisms were analysed and genotypes correlated with gold standard clinical measures to assess PTSD severity and related phenotypes (depression, anxiety, stress, resilience) based on diagnostic status. Multiple NOS1AP polymorphisms were associated across all measures, and NOS1 polymorphisms were associated with PTSD severity, stress and resilience. The GG genotype of NOS1 polymorphism rs10744891 was associated with PTSD severity (surviving multiple correction) while the combined TT-TG genotypes were associated with resilience (p=0.005; p=0.033, respectively). This study indicates that NOS1AP and NOS1 from the nitric oxide pathway are likely to play a key role in PTSD, its comorbidities and resilience. Given the essential role of NOS1AP and NOS1 in stress response they may be reliable targets for screening and intervention strategies. Crown Copyright © 2017. Published by Elsevier B.V. All rights reserved.

  5. Horizontal gene acquisitions by eukaryotes as drivers of adaptive evolution.

    Science.gov (United States)

    Schönknecht, Gerald; Weber, Andreas P M; Lercher, Martin J

    2014-01-01

    In contrast to vertical gene transfer from parent to offspring, horizontal (or lateral) gene transfer moves genetic information between different species. Bacteria and archaea often adapt through horizontal gene transfer. Recent analyses indicate that eukaryotic genomes, too, have acquired numerous genes via horizontal transfer from prokaryotes and other lineages. Based on this we raise the hypothesis that horizontally acquired genes may have contributed more to adaptive evolution of eukaryotes than previously assumed. Current candidate sets of horizontally acquired eukaryotic genes may just be the tip of an iceberg. We have recently shown that adaptation of the thermoacidophilic red alga Galdieria sulphuraria to its hot, acid, toxic-metal laden, volcanic environment was facilitated by the acquisition of numerous genes from extremophile bacteria and archaea. Other recently published examples of horizontal acquisitions involved in adaptation include ice-binding proteins in marine algae, enzymes for carotenoid biosynthesis in aphids, and genes involved in fungal metabolism. Editor's suggested further reading in BioEssays Jumping the fine LINE between species: Horizontal transfer of transposable elements in animals catalyses genome evolution Abstract. © 2014 WILEY Periodicals, Inc.

  6. Horizontal gene transfer from Agrobacterium to plants

    Directory of Open Access Journals (Sweden)

    Tatiana V. Matveeva

    2014-08-01

    Full Text Available Most genetic engineering of plants uses Agrobacterium mediated transformation to introduce novel gene content. In nature, insertion of T-DNA in the plant genome and its subsequent transfer via sexual reproduction has been shown in several species in the genera Nicotiana and Linaria. In these natural examples of horizontal gene transfer from Agrobacterium to plants, the T-DNA donor is assumed to be a mikimopine strain of A.rhizogenes. A sequence homologous to the T-DNA of the Ri plasmid of Agrobacterium rhizogenes was found in the genome of untransformed Nicotiana glauca about 30 years ago, and was named cellular T-DNA (cT-DNA. It represents an imperfect inverted repeat and contains homologues of several T-DNA oncogenes (NgrolB, NgrolC, NgORF13, NgORF14 and an opine synthesis gene (Ngmis. A similar cT-DNA has also been found in other species of the genus Nicotiana. These presumably ancient homologues of T-DNA genes are still expressed, indicating that they may play a role in the evolution of these plants. Recently T-DNA has been detected and characterized in Linaria vulgaris and L. dalmatica. In Linaria vulgaris the cT-DNA is present in two copies and organized as a tandem imperfect direct repeat, containing LvORF2, LvORF3, LvORF8, LvrolA, LvrolB, LvrolC, LvORF13, LvORF14, and the Lvmis genes. All L. vulgaris and L. dalmatica plants screened contained the same T-DNA oncogenes and the mis gene. Evidence suggests that there were several independent T-DNA integration events into the genomes of these plant genera. We speculate that ancient plants transformed by A. rhizogenes might have acquired a selective advantage in competition with the parental species. Thus, the events of T-DNA insertion in the plant genome might have affected their evolution, resulting in the creation of new plant species. In this review we focus on the structure and functions of cT-DNA in Linaria and Nicotiana and discuss their possible evolutionary role.

  7. Once daily maraviroc 300 mg or 150 mg in combination with ritonavir-boosted darunavir 800/100 mg.

    Science.gov (United States)

    Okoli, Chinyere; Siccardi, Marco; Thomas-William, Sathish; Dufty, Ngozi; Khonyongwa, Kirstin; Ainsworth, Jonathan; Watson, John; Cook, Roseanne; Gandhi, Kate; Hickinbottom, Geraldine; Owen, Andrew; Taylor, Stephen

    2012-03-01

    To describe the pharmacokinetics of maraviroc when dosed at 150 or 300 mg once daily with 800/100 mg of darunavir/ritonavir. A retrospective case-note review of HIV-infected adults taking maraviroc was conducted. Patients on a maraviroc-based regimen for a minimum of 5 weeks were grouped as receiving: (i) 300 mg of maraviroc twice daily with 245 mg of tenofovir/200 mg of emtricitabine; (ii) 300 mg of maraviroc once daily with 800/100 mg of darunavir/ritonavir once daily; and (iii) 150 mg of maraviroc once daily with 800/100 mg of darunavir/ritonavir once daily. C(trough) and C(peak) data were collected at 2, 12 or 24 h post-dose. Sixty-six patients were included, providing 115 samples. The median (IQR) C(peak) was 378 (350-640) ng/mL for 300 mg of maraviroc twice daily with 245 mg of tenofovir/200 mg of emtricitabine (n=9), 728 (378-935) ng/mL for 300 mg of maraviroc once daily with darunavir/ritonavir (n=29) and 364 (104-624) ng/mL for 150 mg of maraviroc once daily with darunavir/ritonavir (n=2; P=0.24). The median (IQR) C(trough) was 46 (33-61) ng/mL for 300 mg of maraviroc twice daily with 245 mg of tenofovir/200 mg of emtricitabine (n=12), 70 (49-97) ng/mL for 300 mg of maraviroc once daily with darunavir/ritonavir (n=34) and 43 (35-55) ng/mL for 150 mg of maraviroc once daily with darunavir/ritonavir (n=17; P=0.001). The maraviroc C(trough) in black patients (n=34) was 61 (45-110) ng/mL and in white patients (n=29) it was 49 (42-70) ng/mL (P=0.04). The C(peak) in black patients (n=20) was 800 (397-1060) ng/mL versus 387 (336-723) ng/mL in white patients (n=20; P=0.02). Once daily coadministration of 300 mg of maraviroc with 800/100 mg of darunavir/ritonavir was well tolerated and had favourable pharmacokinetics when compared with 300 mg of maraviroc twice daily with 245 mg of tenofovir/200 mg of emtricitabine. A 24% higher C(trough) and 107% higher C(peak) was seen in black patients compared with white patients.

  8. Horizontal Transfer and the Evolution of Host-Pathogen Interactions

    Science.gov (United States)

    de la Casa-Esperón, Elena

    2012-01-01

    Horizontal gene transfer has been long known in viruses and prokaryotes, but its importance in eukaryotes has been only acknowledged recently. Close contact between organisms, as it occurs between pathogens and their hosts, facilitates the occurrence of DNA transfer events. Once inserted in a foreign genome, DNA sequences have sometimes been coopted by pathogens to improve their survival or infectivity, or by hosts to protect themselves against the harm of pathogens. Hence, horizontal transfer constitutes a source of novel sequences that can be adopted to change the host-pathogen interactions. Therefore, horizontal transfer can have an important impact on the coevolution of pathogens and their hosts. PMID:23227424

  9. Capillary-contacting horizontal cells in the rodent retina.

    Science.gov (United States)

    Mojumder, Deb Kumar

    2008-06-01

    Horizontal cells, the interneurons in the distal retina, provide feedback control of the photoreceptor synaptic output at the first synapse in the visual pathway. This article, using immunohistological and confocal microscopy techniques, presents anatomical evidence that in rat and mouse retina, the horizontal cell processes are in contact with retinal capillaries as are retinal glial cells. This glia-like property of horizontal cells in these two species, also previously reported in tree shrews by Knabe and Ochs (1999), appear to be a more common theme for these neurons than previously appreciated.

  10. Características demográficas e psicossociais associadas à depressão pós-parto em uma amostra de Belo Horizonte Demographic and psychosocial characteristics associated with postpartum depression in a sample from Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Patricia Gomes Figueira

    2011-01-01

    Full Text Available INTRODUÇÃO: A depressão pós-parto (DPP tem sido alvo de inúmeras investigações científicas devido à sua alta prevalência e gravidade e também por suas repercussões negativas na puérpera e na criança. OBJETIVO:Comparar mulheres com e sem DPP em um grupo de puérperas selecionadas aleatoriamente a partir dos partos ocorridos em uma maternidade de Belo Horizonte (MG. MÉTODOS: Selecionamos 245 mulheres que tiveram parto em uma maternidade de Belo Horizonte. Aplicamos uma entrevista semiestruturada para a obtenção de dados psicossociais e demográficos e uma entrevista estruturada (Mini Neuropsychiatric Interview, MINI-Plus para o diagnóstico de depressão maior segundo critérios do Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV. RESULTADOS:26,9% das mulheres tinham diagnóstico de DPP. Não encontramos diferenças entre as características sociodemográficas das mulheres com (n = 66, 26,9% e sem diagnóstico de DPP (n = 179, 73,1%. Entretanto, diversas variáveis clínicas e psicossociais se mostraram significativamente diferentes entre os dois grupos, tais como história de depressão, vivência de estresse ou presença de sintomas depressivos ou ansiosos durante a gravidez, ocorrência de complicações maternas ou na criança no pós-parto e insuficiência de suporte nos cuidados pós-natais. CONCLUSÃO: A identificação de fatores associados à DPP é importante para a compreensão de sua etiopatogenia e para o estabelecimento de estratégias de prevenção e tratamento precoce dessa grave doença.INTRODUCTION: Postpartum depression has been the object of extensive research both because of its high prevalence and its repercussions on the mother and the infant. OBJECTIVE:To compare women with and without depression in a sample of postpartum women randomly selected at a maternity in the city of Belo Horizonte, Brazil. METHODS: A total of 245 women who gave birth at a private maternity hospital in

  11. Marcos, horizontes visuales y experiencia del lugar

    Directory of Open Access Journals (Sweden)

    Enrique de Teresa

    2012-12-01

    Full Text Available

    Resumen

    "Habiendo educado mis ojos en el espectáculo de las cosas, intento deciros lo bello que he encontrado" Le Corbusier (El viaje de Oriente

    Desde la temprana fecha de 1911, en que realiza su viaje a Oriente, Le Corbusier nos muestra la capacidad mediadora que tiene la arquitectura para vincular los espacios, para conectar visualmente interior y exterior, para hacernos redescubrir la naturaleza acentuando nuestra percepción consciente. Sus dibujos sobre Villa Adriana, Pompeya, Atenas, etc., son un ejemplo de cómo percibir y plasmar en croquis su observación de la arquitectura y su ámbito exterior, de la captación del papel mediador entre arquitectura y lugar.
    En sus textos posteriores, y especialmente en "Vers une  architecture" (1923, así como a través de la experiencia de sus casas en los años veinte, nos mostrará el valor de las  operaciones que acotan, enmarcan y proporcionan una   dimensión de los espacios y del paisaje. Lo que hace de manera explícita y precisa en el texto "Une petite maison" (1923.
    Alvar Aalto y, posteriormente, Álvaro Siza, recogerán esta  capacidad de mediación entre arquitectura y lugar, buscando estimular la mirada para alentar la consciencia y el goce de los espacios y de la naturaleza. Las estrategias de la visión que  proponen, sobre todo en el último caso, lo llegan a  emparentar con el compromiso de enseñarnos a mirar y  experimentar del Land Art.
    Más allá de las imágenes expresivas y del lenguaje se tratará de ver, mediante ejemplos concretos, como la arquitectura se configura como vehículo de una percepción renovada y  alentadora de los espacios y del lugar.

    Palabras clave

    percepción, arquitectura, mediación, lugar, espacio

    Abstract

    "Having educated my eyes in the spectacle of things, I try to tell you what I have found beautiful." Le Corbusier (The

  12. A horizontal plug flow and stackable pilot microbial fuel cell for municipal wastewater treatment.

    Science.gov (United States)

    Feng, Yujie; He, Weihua; Liu, Jia; Wang, Xin; Qu, Youpeng; Ren, Nanqi

    2014-03-01

    An application-oriented stackable horizontal MFC (SHMFC) was designed and proved to be capable for sewage treatment and simultaneously energy recovery. The system consisted of multiple stackable 250L modules, which is the largest single MFC module by far. Domestic wastewater was fed into SHMFC in horizontal advection. During the stable operation period, a maximum current 0.435±0.010A in each module was observed under the external resistance of 1Ω and the maximum power density was 116mW. The effluent COD was 70±17mgL(-1) with a removal rate of 79±7% and the effluent TN was 13±3mgL(-1) with a removal rate of 71±8%. From the comparison between SHMFC module (250L) and 4-cm cubic MFC (28mL), the internal resistance distribution changes and the contact resistance becomes assignable and even limiting factor in the enlargement. Copyright © 2014 Elsevier Ltd. All rights reserved.

  13. Preparation and Hydrogen Storage Properties of Mg-Rich Mg-Ni Ultrafine Particles

    Directory of Open Access Journals (Sweden)

    Jianxin Zou

    2012-01-01

    Full Text Available In the present work, Mg-rich Mg-Ni ultrafine powders were prepared through an arc plasma method. The phase components, microstructure, and hydrogen storage properties of the powders were carefully investigated. It is found that Mg2Ni and MgNi2 could be obtained directly from the vapor state reactions between Mg and Ni, depending on the local vapor content in the reaction chamber. A nanostructured MgH2 + Mg2NiH4 hydrogen storage composite could be generated after hydrogenation of the Mg-Ni ultrafine powders. After dehydrogenation, MgH2 and Mg2NiH4 decomposed into nanograined Mg and Mg2Ni, respectively. Thermogravimetry/differential scanning calorimetry (TG/DSC analyses showed that Mg2NiH4 phase may play a catalytic role in the dehydriding process of the hydrogenated Mg ultrafine particles.

  14. Inhibition of NLRP3 Inflammasome Prevents LPS-Induced Inflammatory Hyperalgesia in Mice: Contribution of NF-κB, Caspase-1/11, ASC, NOX, and NOS Isoforms.

    Science.gov (United States)

    Dolunay, Abdurrahman; Senol, Sefika Pinar; Temiz-Resitoglu, Meryem; Guden, Demet Sinem; Sari, Ayse Nihal; Sahan-Firat, Seyhan; Tunctan, Bahar

    2017-04-01

    The nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3), an intracellular signaling molecule that senses many environmental- and pathogen/host-derived factors, has been implicated in the pathogenesis of several diseases associated with inflammation. It has been suggested that NLRP3 inflammasome inhibitors may have a therapeutic potential in the treatment of NLRP3-related inflammatory diseases. The aim of this study was to determine whether inhibition of NLRP3 inflammasome prevents inflammatory hyperalgesia induced by lipopolysaccharide (LPS) in mice as well as changes in expression/activity of nuclear factor κB (NF-κB), caspase-1/11, nicotinamide adenine dinucleotide phosphate oxidase (NOX), and endothelial/neuronal/inducible nitric oxide synthase (eNOS/nNOS/iNOS) that may regulate NLRP3/apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC)/pro-caspase-1 inflammasome formation and activity by using a selective NLRP3 inflammasome inhibitor, MCC950. Male mice received saline (10 ml/kg; i.p.), LPS (10 mg/kg; i.p.), and/or MCC950 (3 mg/kg; i.p.). Reaction time to thermal stimuli within 1 min was evaluated after 6 h. The mice were killed and the brains, hearts, and lungs were collected for measurement of NF-κB, caspase-1, caspase-11, NLRP3, ASC, NOX subunits (gp91 phox ; NOX2), and p47 phox ; NOXO2), nitrotyrosine, eNOS, nNOS, iNOS, and β-actin protein expression, NOS activity, and interleukin (IL)-1β levels. LPS-induced hyperalgesia was associated with a decrease in eNOS, nNOS, and iNOS protein expression and activity as well as an increase in expression of NF-κB p65, caspase-1 p20, caspase-11 p20, NLRP3, ASC, gp91 phox , p47 phox , and nitrotyrosine proteins in addition to elevated IL-1β levels. The LPS-induced changes were prevented by MCC950. The results suggest that inhibition of NLRP3/ASC/pro-caspase-1 inflammasome formation and activity prevents inflammatory hyperalgesia induced by LPS in mice as well as

  15. Strong horizontal photospheric magnetic field in a surface dynamo simulation

    NARCIS (Netherlands)

    SchÜssler, M.; Vögler, A.|info:eu-repo/dai/nl/323397212

    2008-01-01

    Context. Observations with the Hinode spectro-polarimeter have revealed strong horizontal internetwork magnetic fields in the quiet solar photosphere. Aims. We aim to interpret the observations with results from numerical simulations. Methods. Radiative MHD simulations of dynamo action by

  16. Horizontal running mattress suture modified with intermittent simple loops.

    Science.gov (United States)

    Chacon, Anna H; Shiman, Michael I; Strozier, Narissa; Zaiac, Martin N

    2013-01-01

    Using the combination of a horizontal running mattress suture with intermittent loops achieves both good eversion with the horizontal running mattress plus the ease of removal of the simple loops. This combination technique also avoids the characteristic railroad track marks that result from prolonged non-absorbable suture retention. The unique feature of our technique is the incorporation of one simple running suture after every two runs of the horizontal running mattress suture. To demonstrate its utility, we used the suturing technique on several patients and analyzed the cosmetic outcome with post-operative photographs in comparison to other suturing techniques. In summary, the combination of running horizontal mattress suture with simple intermittent loops demonstrates functional and cosmetic benefits that can be readily taught, comprehended, and employed, leading to desirable aesthetic results and wound edge eversion.

  17. Vertical and horizontal spheroidal boundary-value problems

    Science.gov (United States)

    Šprlák, Michal; Tangdamrongsub, Natthachet

    2017-12-01

    Vertical and horizontal spheroidal boundary-value problems (BVPs), i.e., determination of the external gravitational potential from the components of the gravitational gradient on the spheroid, are discussed in this article. The gravitational gradient is decomposed into the series of the vertical and horizontal vector spheroidal harmonics, before being orthogonalized in a weighted sense by two different approaches. The vertical and horizontal spheroidal BVPs are then formulated and solved in the spectral and spatial domains. Both orthogonalization methods provide the same analytical solutions for the vertical spheroidal BVP, and give distinct, but equivalent, analytical solutions for the horizontal spheroidal BVP. A closed-loop simulation is performed to test the correctness of the analytical solutions, and we investigate analytical properties of the sub-integral kernels. The systematic treatment of the spheroidal BVPs and the resulting mathematical equations extend the theoretical apparatus of geodesy and of the potential theory.

  18. Effect of horizontal wave barriers on ground vibration propagation.

    Science.gov (United States)

    Grau, L; Laulagnet, B

    2015-09-01

    The aim of this article is to introduce a method to mitigate ground surface vibration through a flexural plate coupled to the ground and acting as a horizontal wave barrier. Using the thin plate hypothesis, two flexural plates are coupled to the ground, the first plate being the excited plate and the second plate the horizontal wave barrier. For instance, the first plate may represent a slab track and be excited by the tramway wheels. A solution to the problem can be found using a spatial two-dimensional Fourier transform of the elastodynamics equation for the ground and a modal decomposition for the flexural plate vibration. The authors show that vibration is substantially mitigated by the horizontal wave barrier and depends on its thickness and width. When the top surface wavelength becomes smaller than twice the plate width, the horizontal wave barrier acts as a wave barrier in the frequency range of interest, i.e., from 20 Hz.

  19. Determination of Elastic Twist in Horizontal Axis Wind Turbines (HAWTs)

    Energy Technology Data Exchange (ETDEWEB)

    Stoddard, F.; Nelson, V.; Starcher, K.; Andrews, B.

    2006-06-01

    This report presents the results of a project at the Alternative Energy Institute (AEI) which measured and calculated the elastic twist of three representative composite horizontal-axis blades: Carter 300, Gougeon ESI 54, and UTRC 8 kW.

  20. Horizontal Branch stars as AmFm/HgMn stars

    OpenAIRE

    Michaud, G.; Richer, J.

    2008-01-01

    Recent observations and models for horizontal branch stars are briefly described and compared to models for AmFm stars. The limitations of those models are emphasized by a comparison to observations and models for HgMn stars.

  1. A dynamic framework for managing horizontal cooperation in logistics

    NARCIS (Netherlands)

    Verstrepen, Sven; Cools, Martine; Cruijssen, Frans; Dullaert, Wout

    2009-01-01

    This paper first explores the motives and drivers that Logistic Service Providers (LSPs) may feel to start up horizontal cooperation. Secondly, a classification supporting LSPs in their search for a suitable collaboration structure is developed based on distinguishing cooperation characteristics

  2. Determination of horizontal and vertical distribution of tree species in ...

    African Journals Online (AJOL)

    Determination of horizontal and vertical distribution of tree species in Turkey via Shuttle Radar Topography Mission (SRTM) satellite data and geographic information system: the case of Crimean pine ( Pinus nigra )

  3. Plasmid Diversity and Horizontal Transfer in Marine Sediment Microbial Communities

    National Research Council Canada - National Science Library

    Sobecky, Patricia

    2002-01-01

    .... While plasmid exchange is an important mechanism by which bacterial populations can evolve and adapt, there remains a lack of information regarding the role of horizontal plasmid-mediated transfer...

  4. [Horizontal transfer of antibiotic resistance genes in the environment].

    Science.gov (United States)

    Yang, Feng-Xia; Mao, Da-Qing; Luo, Yi; Wang, Qing; Mu, Quan-Hua

    2013-10-01

    The transfer of antibiotic resistance genes (ARGs), a new type of environmental pollutants, could have more adverse effects on the environment than the ARGs themselves, while the horizontal gene transfer (HGT) could be the most important propagation pathways of the ARGs, being one of the reasons for the growing pollution of ARGs in the environment. This paper systematically elaborated the molecular elements of the horizontal transfer of ARGs and the related affecting factors, which was of significance for investigating the molecular mechanisms of the horizontal transfer of the ARGs. In combining with the phylogenetic mechanisms of multiple antibiotic resistances, this paper also provided effective strategies to reduce the transfer and proliferation of ARGs in the environment. Based on the present contamination situations, the further researches on the horizontal transfer of ARGs in the environment were prospected.

  5. Rare occurrence of the left maxillary horizontal third molar impaction ...

    African Journals Online (AJOL)

    Rare occurrence of the left maxillary horizontal third molar impaction, the right maxillary third molar vertical impaction and the left mandibular third molar vertical impaction with inferior alveolar nerve proximity in a 30 year old female: a case report.

  6. Elasto-plastic frame under horizontal and vertical Gaussian excitation

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager; Tarp-Johansen, Niels Jacob; Randrup-Thomsen, S.

    1999-01-01

    /compression axial force. Assuming that the horizontal excitationof the traverse is Gaussian white noise, statistics related to the plastic displacement response are determinedby use of simulation based on the Slepian modelprocess method combined with envelope excursion properties. Besidesgiving physical insight...

  7. Influence of horizontal resolution and ensemble size on model performance

    CSIR Research Space (South Africa)

    Dalton, A

    2014-10-01

    Full Text Available model forecast fields onto observed gridded mid-summer rainfall over South Africa. Spearman rank correlations are initially used to compare the performance of models with varying horizontal resolution as well as ensemble size. Further verification...

  8. Vasoactive and radioprotective properties of isothiourea derivatives having NOS-inhibitory activity

    Energy Technology Data Exchange (ETDEWEB)

    Filimonova, Marina V.; Shevchenko, Ludmila I.; Ulyanenko, Stepan E.; Makarchuk, Victorya M.; Kuznetsova, Mary N.; Shevchuk, Aza S.; Lushnikova, Galina A.; Chesnakova, Ekaterina A. [Medical Radiological Research Center Health Ministry of Russia, 4, Korolev street, Obninsk, 249036, Kaluga region (Russian Federation)

    2014-07-01

    We studied vasoactive and radioprotective properties of new original N-acyl, S-alkyl isothiourea derivatives which are potent inhibitors of nitric oxide synthases (preferably eNOS and iNOS). These compounds have a moderate toxicity (LD50 - 400-550 mg/kg), and are stable in aqueous solutions. In hemodynamic studies, these compounds exhibited high vasotropic activity. The use of these compounds in doses of 5-15 mg/kg (0,01-0,03 LD{sub 50}) in the experimental animals in a state of the severe hemorrhagic or endo-toxic shock causes a potent vasopressor effect, accompanied by a significant and continuous rise in blood pressure. The increasing of vascular tone developed over 2-5 min after injection and persisted for at least 60-90 minutes, excelling at least 3-5 times the duration of α1-adreno-mimetic vasopressor action. The rapid increase in vascular tone under the influence of these compounds in normo-tonic animals caused protective baroreflex to prevent high blood pressure. At doses of 10-15 mg/kg the reflex reaction was mild, but at higher doses (30-40 mg/kg) the reaction was fierce and prolonged, and was accompanied by severe bradycardia, decreasing of the cardiac output and a significant weakening of the peripheral blood flow. In all cases, the hemodynamic response was reflexive and easily eliminated by atropine. The ability of these compounds to induce circulatory hypoxia was the basis for the study of their radioprotective properties. The study of radioprotective effect on the survival of animals exposed to lethal doses of γ-radiation (10 Gy) and on the survival of hematopoietic clonogenic cells showed that these compounds in doses of 80-150 mg/kg (0,2-0,3 LD50) have considerable radioprotective action, which is comparable with the protective effect of the maximum tolerated dose of cystamine. The factor of change in dose for γ-radiation, estimated by the LD{sub 50}, was 1,42-1,58. We also investigated the ability of the test compounds, due to their hypoxic

  9. COMPOSTAGEM DE DEJETOS DE SUÍNOS

    Directory of Open Access Journals (Sweden)

    Eduardo Gonçalves Xavier

    2008-06-01

    Full Text Available A compostagem, como forma de tratamento para os dejetos de suínos, pode ser uma alternativa viável para gerenciar osefluentes desta importante atividade agropecuária. Deste modo, foi conduzido um estudo em condições de campo em 16 granjas deprodutores de suínos, no sistema de integração com a Perdigão Agroindustrial S/A Regional RS no Sistema Vertical Terminador(SVT, onde os produtores recebem os animais na saída da creche e realizam as fases de crescimento e terminação. Odelineamento experimental utilizado foi o completamente casualizado, com os seguintes tratamentos: Tratamento 1-substratocomposto por serragem, Tratamento 2-substrato composto por maravalha, Tratamento 3-substrato composto por cama de aviário eTratamento 4-Sistema convencional de tratamento de dejetos. Os tratamentos foram distribuídos às unidades experimentais(granjas de maneira aleatória, onde cada tratamento teve quatro repetições. Foram analisadas as variáveis meteorológicas,temperatura do processo de compostagem, volume de dejetos produzidos e análise físico-química do composto e dos dejetoslíquidos. Os dados coletados foram submetidos à análise com o uso de um programa estatístico, sendo que as médias dostratamentos foram comparadas através do uso de contrastes ortogonais. Houve efeito de tratamento para as variáveis volume ematéria seca dos dejetos. Conclui-se que o sistema muda as características físicas dos dejetos, reduz o volume e concentranutrientes.

  10. COMPOSTAGEM DE DEJETOS DE SUÍNOS

    Directory of Open Access Journals (Sweden)

    Marcos Antonio Daí Pra

    2008-11-01

    Full Text Available A compostagem, como forma de tratamento para os dejetos de suínos, pode ser uma alternativa viável para gerenciar os efluentes desta importante atividade agropecuária. Deste modo, foi conduzido um estudo em condições de campo em 16 granjas de produtores de suínos, no sistema de integração com a Perdigão Agroindustrial S/A Regional RS no Sistema Vertical Terminador (SVT, onde os produtores recebem os animais na saída da creche e realizam as fases de crescimento e terminação. O delineamento experimental utilizado foi o completamente casualizado, com os seguintes tratamentos: Tratamento 1-substrato composto por serragem, Tratamento 2-substrato composto por maravalha, Tratamento 3-substrato composto por cama de aviário e Tratamento 4-Sistema convencional de tratamento de dejetos. Os tratamentos foram distribuídos às unidades experimentais (granjas de maneira aleatória, onde cada tratamento teve quatro repetições. Foram analisadas as variáveis meteorológicas, temperatura do processo de compostagem, volume de dejetos produzidos e análise físico-química do composto e dos dejetos líquidos. Os dados coletados foram submetidos à análise com o uso de um programa estatístico, sendo que as médias dos tratamentos foram comparadas através do uso de contrastes ortogonais. Houve efeito de tratamento para as variáveis volume e matéria seca dos dejetos. Conclui-se que o sistema muda as características físicas dos dejetos, reduz o volume e concentra nutrientes.

  11. Horizontal gaze palsy with progressive scoliosis: CT and MR findings

    Energy Technology Data Exchange (ETDEWEB)

    Bomfim, Rodrigo C.; Tavora, Daniel G.F.; Nakayama, Mauro; Gama, Romulo L. [Sarah Network of Rehabilitation Hospitals, Department of Radiology, Ceara (Brazil)

    2009-02-15

    Horizontal gaze palsy with progressive scoliosis (HGPPS) is a rare congenital disorder characterized by absence of conjugate horizontal eye movements and progressive scoliosis developing in childhood and adolescence. We present a child with clinical and neuroimaging findings typical of HGPPS. CT and MRI of the brain demonstrated pons hypoplasia, absence of the facial colliculi, butterfly configuration of the medulla and a deep midline pontine cleft. We briefly discuss the imaging aspects of this rare entity in light of the current literature. (orig.)

  12. Horizontal Coherence of Wave Forces on Vertical Wall Breakwaters

    DEFF Research Database (Denmark)

    Archetti, R.; Frigaard, Peter; Lamberti, A.

    2001-01-01

    of breaking waves for increasing wave height are estimated and compared with existing empirical formulae. The horizontal dimension of the breaker is investigated using two different methodologies: the first analyses the decreasing of the highest 1/250 force with increasing horizontal dimension of the caisson......, with special attention to the effects of wave spreading, and the second analyses the spatial correlation of impulsive force per unit length along the breakwater....

  13. SATURATED-SUBCOOLED STRATIFIED FLOW IN HORIZONTAL PIPES

    Energy Technology Data Exchange (ETDEWEB)

    Richard Schultz

    2010-08-01

    Advanced light water reactor systems are designed to use passive emergency core cooling systems with horizontal pipes that provide highly subcooled water from water storage tanks or passive heat exchangers to the reactor vessel core under accident conditions. Because passive systems are driven by density gradients, the horizontal pipes often do not flow full and thus have a free surface that is exposed to saturated steam and stratified flow is present.

  14. Targeting Horizontal Inequalities: Ethnicity, Equity, and Entrepreneurship in Malaysia

    OpenAIRE

    Edmund Terence Gomez

    2012-01-01

    This study examines whether the horizontal inequality policies in Malaysia that preferentially target the indigenous ethnic groups (Bumiputera) are the ideal tool to reduce racial conflict. It also reviews whether the employment of race-based (Bumiputera-biased) policies is an effective method to help nurture highly entrepreneurial small- and medium-sized enterprises (SMEs). The case of large Bumiputera enterprises indicates that horizontal inequality-based policies has unproductive outcomes....

  15. Widespread of horizontal gene transfer in the human genome.

    Science.gov (United States)

    Huang, Wenze; Tsai, Lillian; Li, Yulong; Hua, Nan; Sun, Chen; Wei, Chaochun

    2017-04-04

    A fundamental concept in biology is that heritable material is passed from parents to offspring, a process called vertical gene transfer. An alternative mechanism of gene acquisition is through horizontal gene transfer (HGT), which involves movement of genetic materials between different species. Horizontal gene transfer has been found prevalent in prokaryotes but very rare in eukaryote. In this paper, we investigate horizontal gene transfer in the human genome. From the pair-wise alignments between human genome and 53 vertebrate genomes, 1,467 human genome regions (2.6 M bases) from all chromosomes were found to be more conserved with non-mammals than with most mammals. These human genome regions involve 642 known genes, which are enriched with ion binding. Compared to known horizontal gene transfer regions in the human genome, there were few overlapping regions, which indicated horizontal gene transfer is more common than we expected in the human genome. Horizontal gene transfer impacts hundreds of human genes and this study provided insight into potential mechanisms of HGT in the human genome.

  16. Should sex-ratio distorting parasites abandon horizontal transmission?

    Science.gov (United States)

    2011-01-01

    Background Sex-ratio distorting parasites are of interest due to their effects upon host population dynamics and their potential to influence the evolution of host sex determination systems. In theory, the ability to distort host sex-ratios allows a parasite with efficient vertical (hereditary) transmission to dispense completely with horizontal (infectious) transmission. However, recent empirical studies indicate that some sex-ratio distorting parasites have retained the capability for horizontal transmission. Results Numerical simulations using biologically realistic parameters suggest that a feminising parasite is only likely to lose the capability for horizontal transmission if its host occurs at low density and/or has a male-biased primary sex ratio. It is also demonstrated that even a small amount of horizontal transmission can allow multiple feminising parasites to coexist within a single host population. Finally it is shown that, by boosting its host's rate of population growth, a feminising parasite can increase its own horizontal transmission and allow the invasion of other, more virulent parasites. Conclusions The prediction that sex-ratio distorting parasites are likely to retain a degree of horizontal transmission has important implications for the epidemiology and host-parasite interactions of these organisms. It may also explain the frequent co-occurrence of several sex-ratio distorting parasite species in nature. PMID:22188680

  17. Should sex-ratio distorting parasites abandon horizontal transmission?

    Directory of Open Access Journals (Sweden)

    Ironside Joseph E

    2011-12-01

    Full Text Available Abstract Background Sex-ratio distorting parasites are of interest due to their effects upon host population dynamics and their potential to influence the evolution of host sex determination systems. In theory, the ability to distort host sex-ratios allows a parasite with efficient vertical (hereditary transmission to dispense completely with horizontal (infectious transmission. However, recent empirical studies indicate that some sex-ratio distorting parasites have retained the capability for horizontal transmission. Results Numerical simulations using biologically realistic parameters suggest that a feminising parasite is only likely to lose the capability for horizontal transmission if its host occurs at low density and/or has a male-biased primary sex ratio. It is also demonstrated that even a small amount of horizontal transmission can allow multiple feminising parasites to coexist within a single host population. Finally it is shown that, by boosting its host's rate of population growth, a feminising parasite can increase its own horizontal transmission and allow the invasion of other, more virulent parasites. Conclusions The prediction that sex-ratio distorting parasites are likely to retain a degree of horizontal transmission has important implications for the epidemiology and host-parasite interactions of these organisms. It may also explain the frequent co-occurrence of several sex-ratio distorting parasite species in nature.

  18. Paradoxical regulation of ChAT and nNOS expression in animal models of Crohn's colitis and ulcerative colitis.

    Science.gov (United States)

    Winston, John H; Li, Qingjie; Sarna, Sushil K

    2013-08-15

    Morphological and functional changes in the enteric nervous system (ENS) have been reported in inflammatory bowel disease. We examined the effects of inflammation on the expression of choline acetyltransferase (ChAT) and nNOS in the muscularis externae of two models of colonic inflammation, trinitrobenzene sulfonic acid (TNBS)-induced colitis, which models Crohn's disease-like inflammation, and DSS-induced colitis, which models ulcerative Colitis-like inflammation. In TNBS colitis, we observed significant decline in ChAT, nNOS, and protein gene product (PGP) 9.5 protein and mRNA levels. In DSS colitis, ChAT and PGP9.5 were significantly upregulated while nNOS levels did not change. The nNOS dimer-to-monomer ratio decreased significantly in DSS- but not in TNBS-induced colitis. No differences were observed in the percentage of either ChAT (31 vs. 33%)- or nNOS (37 vs. 41%)-immunopositive neurons per ganglia or the mean number of neurons per ganglia (55 ± 5 vs. 59 ± 5, P > 0.05). Incubation of the distal colon muscularis externae in vitro with different types of inflammatory mediators showed that cytokines decreased ChAT and nNOS expression, whereas H₂O₂, a component of oxidative stress, increased their expression. NF-κB inhibitor MG-132 did not prevent the IL-1β-induced decline in either ChAT or nNOS expression. These findings showed that TNBS- and DSS-induced inflammation differentially regulates the expression of two critical proteins expressed in the colonic myenteric neurons. These differences are likely due to the exposure of the myenteric plexus neurons to different combinations of Th1-type inflammatory mediators and H₂O₂ in each model.

  19. ATRAVESSAMENTO DE SABERES NOS ESTUDOS SOBRE A LINGUAGEM NO/DO BRASIL NOS ANOS 50

    OpenAIRE

    Caroline Mallmann Schneiders

    2011-01-01

    A problemática de pesquisa sobre a qual nos debruçamos neste estudo de dissertação volta-se a uma reflexão em torno do discurso sobre a produção do conhecimento linguístico dos anos 50 no/do Brasil. Nosso escopo central está na compreensão da temporalidade e da memória discursiva que constituem o discurso científico sobre a linguagem dessa conjuntura a partir do atravessamento de saberes do campo disciplinar da Linguística. Interessa-nos este atravessamento, pois esse domínio de saber a...

  20. Reversible S(0) /MgSx Redox Chemistry in a MgTFSI2 /MgCl2 /DME Electrolyte for Rechargeable Mg/S Batteries.

    Science.gov (United States)

    Gao, Tao; Hou, Singyuk; Wang, Fei; Ma, Zhaohui; Li, Xiaogang; Xu, Kang; Wang, Chunsheng

    2017-10-16

    The redox chemistry of magnesium and its application in rechargeable Mg batteries has received increasing attention owing to the unique benefits of Mg metal electrodes, namely high reversibility without dendrite formation, low reduction potentials, and high specific capacities. The Mg/S couple is of particular interest owing to its high energy density and low cost. Previous reports have confirmed the feasibility of a rechargeable Mg/S battery; however, only limited cycling stability was achieved, and the complicated procedure for the preparation of the electrolytes has significantly compromised the benefits of Mg/S chemistry and hindered the development of Mg/S batteries. Herein, we report the development of the first rechargeable Mg/S battery with a MgTFSI2 /MgCl2 /DME electrolyte (DME=1,2-dimethoxyethane, TFSI=bis(trifluoromethanesulfonyl)imide) and realize the best cycling stability among all reported Mg/S batteries by suppressing polysulfide dissolution. Mechanistic studies show that the battery works via S(0) /MgSx redox processes and that the large voltage hysteresis is mainly due to the Mg anode overpotential. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  1. Cleanup/stimulation of a horizontal wellbore using propellants

    Energy Technology Data Exchange (ETDEWEB)

    Rougeot, J.E.; Lauterbach, K.A.

    1993-01-01

    This report documents the stimulation/cleanup of a horizontal well bore (Wilson 25) using propellants. The Wilson 25 is a Bartlesville Sand well located in the Flatrock Field, Osage County, Oklahoma. The Wilson 25 was drilled to determine if horizontal drilling could be used as a means to economically recover primary oil that had been left in place in a mostly abandoned oil field because of the adverse effects of water coning. Pump testing of the Wilson 25 horizontal well bore before cleanup or stimulation produced 6 barrels of oil and .84 barrels of water per day. The high percentage of daily oil production to total daily fluid production indicated that the horizontal well bore had accessed potentially economical oil reserves if the fluid production rate could be increased by performing a cleanup/stimulation treatment. Propellants were selected as an inexpensive means to stimulate and cleanup the near well bore area in a uniform manner. The ignition of a propellant creates a large volume of gas which penetrates the formation, creating numerous short cracks through which hydrocarbons can travel into the well bore. More conventional stimulation/cleanup techniques were either significantly more expensive, less likely to treat uniformly, or could not be confined to the near well bore area. Three different propellant torpedo designs were tested with a total of 304' of horizontal well bore being shot and producible. The initial test shot caused 400' of the horizontal well bore to become plugged off, and subsequently it could not be production tested. The second and third test shots were production tested, with the oil production being increased 458% and 349%, respectively, on a per foot basis. The Wilson 25 results indicate that a propellant shot treatment is an economically viable means to cleanup/stimulate a horizontal well bore.

  2. Natural vibration frequencies of horizontal tubes partially filled with liquid

    Science.gov (United States)

    Santisteban Hidalgo, Juan Andrés; Gama, Antonio Lopes; Moreira, Roger Matsumoto

    2017-11-01

    This work presents an experimental and numerical study on the flexural vibration of horizontal circular tubes partially filled with liquid. The tube is configured as a free-free beam with attention being directed to the case of small amplitudes of transverse oscillation whereas the axial movements of the tube and liquid are disregarded. At first vertical and horizontal polarizations of the flexural tube are investigated experimentally for different amounts of filling liquid. In contrast with the empty and fully-filled tubes, it is observed that natural frequencies of the vertical and horizontal polarizations are different due to asymmetry induced by the liquid layer, which acts like an added mass. Less mass of liquid is added to the tube when oscillating horizontally; as a consequence, eigenfrequencies for the horizontal polarization are found to be greater than the case of the vertically polarized tube. A simple method to calculate the natural vibration frequencies using coefficients of added mass of liquid is proposed. It is shown that the added mass coefficient increases with the liquid's level and viscosity. At last a numerical investigation of the interaction between the liquid and the tube is carried out by solving in two-dimensions the full Navier-Stokes equations via a finite volume method, with the free-surface flow being modeled with a homogeneous multiphase Eulerian-Eulerian fluid approach. Vertical and horizontal polarizations are imposed to the tube with pressure and shear stresses being determined numerically to assess the liquid's forcing onto the tube's wall. The coefficient of added mass of liquid is then estimated by the ratio between the resulting force and the acceleration imposed to the wall. A good agreement is found between experimental and numerical results, especially for the horizontally oscillating tube. It is also shown that viscosity can noticeably affect the added mass coefficients, particularly at low filling levels.

  3. Una propuesta de horizontal verdadera: Estudio preliminar A proposal of True Horizontal. A preliminary study

    Directory of Open Access Journals (Sweden)

    Alma Lucía Castro Lara

    2004-04-01

    Full Text Available El propósito de este estudio fue abordar una propuesta de horizontal verdadera a través del punto T y compararla con los planos de Frankfort y Silla-Nasion. La muestra estuvo conformada por 15 jóvenes de 19-24 años y de ambos sexos, con oclusión normal, procedentes de Culiacán, Sinaloa, México. Las radiografías laterales de cráneo se obtuvieron ubicando al paciente con referencia a la posición natural de la cabeza. Los planos FH y SN se relacionaron con los puntos A, B y Pogonion para establecer diferencias entre las mediciones angulares y lineales. Al analizar el plano de FH en relación con la vertical verdadera, detectamos 8,4º± 3,0 de inclinación y el plano SN mostró igualmente una inclinación de 11,4º. En las variables lineales a la vertical de cada uno de los planos resultaron con diferencias estadísticas; se observó que para VFH-A (p The purpose of this study was to undertake a proposal of True Horizontal through the point "T" and compare it with the Frankfort and Sella-Nasion planes. The sample was composed of 15 young adults aged 19-24 years, both sexes, from Culiacán, Sinaloa, Mexico. They all had normal occlusion. The lateral skull x-rays were made by placing the patient with reference to the natural head position. FH and SN planes were related to points A,B and Pogonion to set differences between angle and linear measurements. In analyzing the FH plane in respect to True Vertical, there were 8.4° ± 3.0 inclination in FH plane and 11.4° in plane SN. The linear variables to the vertical of each of the planes showed statistical differences VFH-A (p< 0.0166, VSN-A (p< 0.0217 and those values related to point B were observed. A similar behavior was found in variables at point Pg where the values of VFH-Pg with VTH-Pg compared to VSN-Pg with VTH-Pg showed statistical differences, finding that they matched with the clinical characteristics of the studied sample. It is necessary to go deeper into these studies so as to

  4. Immunomodulatory effects of royal jelly on aorta CD3, CD68 and eNOS expression in hypercholesterolaemic rats

    Directory of Open Access Journals (Sweden)

    Amal Attia El-Morsy Ibrahim

    2014-08-01

    RJ administration (300 mg/kg/day with CH, produced a counteractive effect, represented in recompense of biochemical alteration, CD4 and CD8 expression. RJ intake also amended the histological picture. The immunohistochemical picture revealed a decrease in CD3, CD86 and eNOS in the aortic tissue. These findings attributed to the significant immunomodulatory effect of RJ remedy suppress deleterious effects of hypercholesterolaemia.

  5. Effect of magnesium supplementation on blood rheology in NOS inhibition-induced hypertension model.

    Science.gov (United States)

    Cengiz, Melike; Ülker, Pinar; Üyüklü, Mehmet; Yaraş, Nazmi; Özen, Nur; Aslan, Mutay; Özyurt, Dilek; Basralı, Filiz

    2016-01-27

    This study investigated the effects of magnesium on blood rheological properties and blood pressure in nitric oxide synthase (NOS) inhibition-induced hypertension model. Hypertension was induced by oral administration of the nonselective NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME, 25 mg/kg/day) for 6 weeks and systolic blood pressure was measured by the tail-cuff method. The groups receiving magnesium supplementation were fed with rat chow containing 0.8% magnesium oxide during the experiment. At the end of experiment, blood samples were obtained from abdominal aorta, using ether anesthesia. Plasma and erythrocyte magnesium levels were determined by the atomic absorption spectrometer. RBC deformability and aggregation were determined by rotational ektacytometry. Plasma fibrinogen concentration was evaluated by ELISA. Whole blood and plasma viscosities were determined by viscometer and intracellular free Ca++ level was measured by using spectroflurometric method. Blood pressure was elevated in hypertensive groups and suppressed by magnesium therapy. Plasma viscosity and RBC aggregation were found to be higher in hypertensive rats than control animals and these parameters significantly decreased in magnesium supplemented hypertensive animals. Other measurements were not different between experimental groups. These results confirm that blood pressure, plasma viscosity and RBC aggregation increased in NOS inhibition-induced hypertension model and oral magnesium supplementation improved these parameters.

  6. Molecular aspects of Mg2+ transport systems.

    Science.gov (United States)

    Smith, D L; Maguire, M E

    1993-01-01

    The gram-negative bacterium Salmonella typhimurium possesses three distinct Mg2+ transport systems, encoded by the CorA, MgtA, and MgtB loci. The CorA transport system is the constitutive Mg2+ influx system but can also mediate efflux at high extracellular Mg2+ concentrations. The CorA protein lacks homology to any known protein, is an integral membrane protein containing 28% percent-charged amino acids, and has three carboxyl terminal membrane-spanning segments. Its properties indicate that it is a new class of membrane transport protein, likely found in all gram-negative bacteria and possibly other organisms. In contrast, the MgtA and MgtB Mg2+ transport systems are normally expressed only at low extracellular Mg2+ concentrations and can mediate only the influx of Mg2+. Both MgtA and MgtB system are P-type ATPases; they have relatively poor homology to other known prokaryotic P-type ATPases but are highly homologous to mammalian P-type ATPases, particularly reticular Ca(2+)-ATPases. Expression of both MgtA and MgtB is highly regulated by the concentration of extracellular Mg2+. Transcription of MgtB is increased about 1,000-fold by lowering Mg2+ from 1 mM to 1 microM, and, under growth conditions of limiting Mg2+, MgtB becomes the dominant Mg2+ influx system. However, it is unclear why the cells require the use of ATP to mediate the influx of Mg2+ down its electrochemical gradient. Study of these Mg2+ transport systems should lead to further understanding of cellular Mg2+ homeostasis and eventually to characterization of eukaryotic Mg2+ transport systems.

  7. Subjetividade, alteridade e desamparo nos tempos atuais

    Directory of Open Access Journals (Sweden)

    Tiago Humberto Rodrigues Rocha

    2014-12-01

    Full Text Available Este trabalho vai ao encontro do que foi realizado ao longo da teoria freudiana: contextualizar o homem em sua ordem social circundante e pensar as relações que se estabelecem na configuração do laço social. O objetivo é refletir sobre as possibilidades de outras articulações metapsicológicas, que permitam compreender a relação dos dispositivos contemporâneos criados para lidar com odesamparo, e as implicações de seu uso recorrente na condição desejante.Para tanto, nos deteremos a propósito das tensões entre as três instâncias do aparelho psíquico: id, ego e superego. Analisando as relações que estruturam o laço social, conseguimos repensar proposições psicanalíticas consagradas, tais como alteridade, desejo, pulsão e seus destinos.

  8. Influence of pavement condition on horizontal curve safety.

    Science.gov (United States)

    Buddhavarapu, Prasad; Banerjee, Ambarish; Prozzi, Jorge A

    2013-03-01

    Crash statistics suggest that horizontal curves are the most vulnerable sites for crash occurrence. These crashes are often severe and many involve at least some level of injury due to the nature of the collisions. Ensuring the desired pavement surface condition is one potentially effective strategy to reduce the occurrence of severe accidents on horizontal curves. This study sought to develop crash injury severity models by integrating crash and pavement surface condition databases. It focuses on developing a causal relationship between pavement condition indices and severity level of crashes occurring on two-lane horizontal curves in Texas. In addition, it examines the suitability of the existing Skid Index for safety maintenance of two-lane curves. Significant correlation is evident between pavement condition and crash injury severity on two-lane undivided horizontal curves in Texas. Probability of a crash becoming fatal is appreciably sensitive to certain pavement indices. Data suggested that road facilities providing a smoother and more comfortable ride are vulnerable to severe crashes on horizontal curves. In addition, the study found that longitudinal skid measurement barely correlates with injury severity of crashes occurring on curved portions. The study recommends exploring the option of incorporating lateral friction measurement into Pavement Management System (PMS) databases specifically at curved road segments. Copyright © 2012 Elsevier Ltd. All rights reserved.

  9. Investigation of gravity waves using horizontally resolved radial velocity measurements

    Science.gov (United States)

    Stober, G.; Sommer, S.; Rapp, M.; Latteck, R.

    2013-10-01

    The Middle Atmosphere Alomar Radar System (MAARSY) on the island of Andøya in Northern Norway (69.3° N, 16.0° E) observes polar mesospheric summer echoes (PMSE). These echoes are used as tracers of atmospheric dynamics to investigate the horizontal wind variability at high temporal and spatial resolution. MAARSY has the capability of pulse-to-pulse beam steering allowing for systematic scanning experiments to study the horizontal structure of the backscatterers as well as to measure the radial velocities for each beam direction. Here we present a method to retrieve gravity wave parameters from these horizontally resolved radial wind variations by applying velocity azimuth display and volume velocity processing. Based on the observations a detailed comparison of the two wind analysis techniques is carried out in order to determine the zonal and meridional wind as well as to measure first-order inhomogeneities. Further, we demonstrate the possibility to resolve the horizontal wave properties, e.g., horizontal wavelength, phase velocity and propagation direction. The robustness of the estimated gravity wave parameters is tested by a simple atmospheric model.

  10. Investigation of gravity waves using horizontally resolved radial velocity measurements

    Directory of Open Access Journals (Sweden)

    G. Stober

    2013-10-01

    Full Text Available The Middle Atmosphere Alomar Radar System (MAARSY on the island of Andøya in Northern Norway (69.3° N, 16.0° E observes polar mesospheric summer echoes (PMSE. These echoes are used as tracers of atmospheric dynamics to investigate the horizontal wind variability at high temporal and spatial resolution. MAARSY has the capability of pulse-to-pulse beam steering allowing for systematic scanning experiments to study the horizontal structure of the backscatterers as well as to measure the radial velocities for each beam direction. Here we present a method to retrieve gravity wave parameters from these horizontally resolved radial wind variations by applying velocity azimuth display and volume velocity processing. Based on the observations a detailed comparison of the two wind analysis techniques is carried out in order to determine the zonal and meridional wind as well as to measure first-order inhomogeneities. Further, we demonstrate the possibility to resolve the horizontal wave properties, e.g., horizontal wavelength, phase velocity and propagation direction. The robustness of the estimated gravity wave parameters is tested by a simple atmospheric model.

  11. A Comparison between Horizontal and Vertical Interchannel Decorrelation

    Directory of Open Access Journals (Sweden)

    Christopher Gribben

    2017-11-01

    Full Text Available The perceptual effects of interchannel decorrelation on perceived image spread have been investigated subjectively in both horizontal and vertical stereophonic reproductions, looking specifically at the frequency dependency of decorrelation. Fourteen and thirteen subjects graded the horizontal and vertical image spreads of a pink noise sample, respectively. The pink noise signal had been decorrelated by a complementary comb-filter decorrelation algorithm, varying the frequency-band, time-delay and decorrelation factor for each sample. Results generally indicated that interchannel decorrelation had a significant effect on auditory image spread both horizontally and vertically, with spread increasing as correlation decreases. However, it was found that the effect of vertical decorrelation was less effective than that of horizontal decorrelation. The results also suggest that the decorrelation effect was frequency-dependent; changes in horizontal image spread were more apparent in the high frequency band, whereas those in vertical image spread were in the low band. Furthermore, objective analysis suggests that the perception of vertical image spread for the low and middle frequency bands could be associated with a floor reflection; whereas for the high band, the results appear to be related to spectral notches in the ear input signals.

  12. Maxillary repositioning according to Frankfort horizontal plane during orthognathic surgery.

    Science.gov (United States)

    Ghoreishian, Mehdi; Hasheminia, Dariush; Hashemzehi, Hadi; Khazaei, Saber

    2013-01-01

    There are a lot of disagreements among surgeons over controlling the maxillary position during orthognathic surgery. To investigate maxillary repositioning according to Frankfort horizontal plane in orthognathic surgery. Fourteen patients were selected who were submitted to maxillary or bimaxillary surgery. Maxillary model surgery was performed based on the treatment planning and an intermediate splint was made. The surgical technique in this study was based on maxillary osteotomy according to the findings of the model surgery, in a manner that the osteotomy line was parallel to the Frankfort horizontal plane. Intermediate splint was used for repositioning of the maxilla in the new position and the vertical position of that was determined according to external reference point and fixed on this position. The upper central incisor designed from prediction tracing and post-operative cephalometry on the first tracing. The new position of maxilla was evaluated horizontally and vertically. A paired t-test was used to compare the predicted maxillary position and the actual position. Association between these two groups of variables was evaluated with Pearson correlation. The mean difference between the maxillary planned position and post-operative cephalometric radiography varied between 0.3 mm and 0.9 mm vertically (P value = 0.315) and 0.0 mm and 0.9 mm horizontally (P value = 0.034). The averages of horizontally and vertically observed changes were 0.3 mm and 0.17 mm respectively (P surgery. By eliminating the ramping effect the accuracy of surgery increases.

  13. Genetic absence of nNOS worsens fetal alcohol effects in mice. I: behavioral deficits.

    Science.gov (United States)

    Karacay, Bahri; Bonthius, Nancy E; Plume, Jeffrey; Bonthius, Daniel J

    2015-02-01

    Alcohol abuse during pregnancy often induces neuropsychological problems in the offspring, including learning disorders, attention deficits, and behavior problems, all of which are prominent components of fetal alcohol spectrum disorders (FASD). However, not all children who were exposed to alcohol in utero are equally affected by it. While some children have major deficits, others are spared. This unequal vulnerability is likely due largely to differences in fetal genetics. Some fetuses appear to have certain genotypes that make them much more prone to FASD. However, to date, no gene has been identified that worsens alcohol-induced brain dysfunction. Nitric oxide (NO) is a gaseous molecule that can protect developing neurons against alcohol-induced death. In the brain, NO is produced by neuronal nitric oxide synthase (nNOS). In this study, we examined whether homozygous mutation of the nNOS gene in mice worsens the behavioral deficits of developmental alcohol exposure. Wild-type and nNOS(-/-) mice received alcohol (0.0, 2.2, or 4.4 mg/g) daily over postnatal days (PDs) 4 to 9. Beginning on PD 85, the mice underwent a series of behavioral tests, including open field activity, the Morris water maze, and paired pulse inhibition. For the wild-type mice, alcohol impaired performance only in the water maze. In contrast, for the nNOS(-/-) mice, alcohol impaired performance on all 3 tasks. Furthermore, the nNOS(-/-) mice were substantially more impaired than wild-type mice in their performance on all 3 of the behavioral tests and at both the low (2.2) and high (4.4) doses of alcohol. Targeted disruption of the nNOS gene worsens the behavioral impact of developmental alcohol exposure and allows alcohol-induced learning problems to emerge that are not seen in wild type. This is the first demonstration that a specific genotype can interact with alcohol to worsen functional brain deficits in an animal model of FASD. Copyright © 2015 by the Research Society on Alcoholism.

  14. A estabilização do arranjo corporativo e as eleições municipais de 1936 em Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Carla Maria Junho Anastasia

    2013-12-01

    Full Text Available O artigo apresenta a estabilização do arranjo corporativo, ameaçado pela eficácia política imprevista adquirida pelo movimento sindical mineiro após a edição do decreto 19770, de março de 1931. Com o mesmo argumento de combater o comunismo, o Ministério do Trabalho interveio diretamente nos sindicatos, nomeando juntas governativas, e as forças políticas locais, em especial o Partido Progressista, buscaram arregimentar a massa trabalhadora nas eleições municipais de 1936 em Belo Horizonte.

  15. Effects of NOS inhibitors on the benzodiazepines-induced memory impairment of mice in the modified elevated plus-maze task.

    Science.gov (United States)

    Orzelska, Jolanta; Talarek, Sylwia; Listos, Joanna; Fidecka, Sylwia

    2013-05-01

    The aim of the present study was to examine the effects of nitric oxide synthase (NOS) inhibitors on responses, elicited by benzodiazepines (BZs) in a modified elevated plus-maze task in mice. It was shown that acute doses of diazepam (DZ; 1 and 2 mg/kg) and flunitrazepam (FNZ; 0.05, 0.1 and 0.2 mg/kg) significantly increased the time of transfer latency (TL2) in a retention trial, thus confirming memory impairing effects of BZs. l-NAME (N(G)-nitro-l-arginine methyl ester; 200 mg/kg), a non-selective inhibitor of NOS, and 7-NI (7-nitroindazole; 40 mg/kg), a selective inhibitor of NOS, further intensified DZ-induced memory impairment. On the other hand, L-NAME (50, 100 and 200 mg/kg) and 7-NI (10, 20 and 40 mg/kg) prevented FNZ-induced memory compromising process. The results of this study indicated that suppressed NO synthesis enhanced DZ-induced but prevented FNZ-induced memory impairment. Taken together, these findings could suggest NO involvement in BZs-induced impairment of memory processes. The precise mechanism of these controversial effects, however, remains elusive. Copyright © 2013 Elsevier B.V. All rights reserved.

  16. Re-examining the 26Mg(α ,α')26Mg reaction: Probing astrophysically important states in 26Mg

    Science.gov (United States)

    Adsley, P.; Brümmer, J. W.; Li, K. C. W.; Marín-Lámbarri, D. J.; Kheswa, N. Y.; Donaldson, L. M.; Neveling, R.; Papka, P.; Pellegri, L.; Pesudo, V.; Pool, L. C.; Smit, F. D.; van Zyl, J. J.

    2017-11-01

    Background: The 22Ne(α ,n )25Mg reaction is one of the neutron sources for the s process in massive stars. The properties of levels in 26Mg above the α -particle threshold control the strengths of the 22Ne(α ,n )25Mg and 22Ne(α ,γ )26Mg reactions. The strengths of these reactions as functions of temperature are one of the major uncertainties in the s process. Purpose: Information on the existence, spin, and parity of levels in 26Mg can assist in constraining the strengths of the 22Ne(α ,γ )26Mg and 22Ne(α ,n )25Mg reactions, and therefore in constraining s -process abundances. Methods: Inelastically scattered α particles from a 26Mg target were momentum-analyzed in the K600 magnetic spectrometer at iThemba LABS, South Africa. The differential cross sections of states were deduced from the focal-plane trajectory of the scattered α particles. Based on the differential cross sections, spin and parity assignments to states are made. Results: A newly assigned 0+ state was observed in addition to a number of other states, some of which can be associated with states observed in other experiments. Some of the deduced Jπ values of the states observed in the present study show discrepancies with those assigned in a similar experiment performed at RCNP Osaka. The reassignments and additions of the various states can strongly affect the reaction rate at low temperatures. Conclusion: The number, location, and assignment of levels in 26Mg that may contribute to the 22Ne+α reactions are not clear. Future experimental investigations of 26Mg must have an extremely good energy resolution to separate the contributions from different levels. Coincidence experiments of 26Mg provide a possible route for future investigations.

  17. Horizontal transfers of transposable elements in eukaryotes: The flying genes.

    Science.gov (United States)

    Panaud, Olivier

    2016-01-01

    Transposable elements (TEs) are the major components of eukaryotic genomes. Their propensity to densely populate and in some cases invade the genomes of plants and animals is in contradiction with the fact that transposition is strictly controlled by several molecular pathways acting at either transcriptional or post-transcriptional levels. Horizontal transfers, defined as the transmission of genetic material between sexually isolated species, have long been considered as rare phenomena. Here, we show that the horizontal transfers of transposable elements (HTTs) are very frequent in ecosystems. The exact mechanisms of such transfers are not well understood, but species involved in close biotic interactions, like parasitism, show a propensity to exchange genetic material horizontally. We propose that HTTs allow TEs to escape the silencing machinery of their host genome and may therefore be an important mechanism for their survival and their dissemination in eukaryotes. Copyright © 2016 Académie des sciences. Published by Elsevier SAS. All rights reserved.

  18. [Benign postural vertigo and nystagmus of the horizontal semicircular canal].

    Science.gov (United States)

    Waespe, W

    1997-02-22

    Benign paroxysmal vertigo and nystagmus are induced not only by the posterior but also by the horizontal semicircular canal. Benign positional nystagmus of the horizontal canal is more often observed than was previously thought. In 10 patients we analyzed the characteristics and the variability of nystagmus which accompanies positional vertigo of the horizontal canal. There are two forms of nystagmus: primary-geotropic, most often paroxysmal nystagmus (7 patients), and primary-apogeotropic, non-paroxysmal nystagmus (3 patients). Interestingly, in 2 patients with the primary-apogeotropic form the nystagmus converted during the examination into the primary-geotropic form. The reverse was not observed. We discuss the possible pathophysiological mechanisms which could be relevant for provoking manoeuvres.

  19. Simulation of Solar Radiation Incident on Horizontal and Inclined Surfaces

    Directory of Open Access Journals (Sweden)

    MA Basunia

    2012-12-01

    Full Text Available A computer model was developed to simulate the hourly, daily and monthly average of daily solar radiation on horizontal and inclined surfaces. The measured hourly and daily solar radiation was compared with simulated radiation, and favourable agreement was observed for the measured and predicted values on clear days. The measured and simulated monthly averages of total (diffuse and beam daily solar radiation were compared and a reasonable agreement was observed for a number of stations in Japan. The simulation showed that during the rice harvesting season, September to October, there is a daily average of 14.7 MJ/m2 of solar irradiation on a horizontal surface in Matsuyama, Japan. There is a similar amount of solar radiation on a horizontal surface during the major rice harvesting season, November to December, in Bangladesh. This radiation can be effectively utilized for drying rough rice and other farm crops.

  20. Extensive horizontal gene transfer in cheese-associated bacteria.

    Science.gov (United States)

    Bonham, Kevin S; Wolfe, Benjamin E; Dutton, Rachel J

    2017-06-23

    Acquisition of genes through horizontal gene transfer (HGT) allows microbes to rapidly gain new capabilities and adapt to new or changing environments. Identifying widespread HGT regions within multispecies microbiomes can pinpoint the molecular mechanisms that play key roles in microbiome assembly. We sought to identify horizontally transferred genes within a model microbiome, the cheese rind. Comparing 31 newly sequenced and 134 previously sequenced bacterial isolates from cheese rinds, we identified over 200 putative horizontally transferred genomic regions containing 4733 protein coding genes. The largest of these regions are enriched for genes involved in siderophore acquisition, and are widely distributed in cheese rinds in both Europe and the US. These results suggest that HGT is prevalent in cheese rind microbiomes, and that identification of genes that are frequently transferred in a particular environment may provide insight into the selective forces shaping microbial communities.

  1. Horizontal Branch Stars in M3 and M13

    Science.gov (United States)

    Gray, R. O.; Corbally, C. J.; Hill, J. M.

    1994-12-01

    We found unexpected spectral characteristics in a set of field horizontal branch stars with spectral types near A0. They showed Balmer line wings that were broad and characteristic of high gravity stars, and further, one third of the FHB stars appeared to have normal metal line strengths despite low m_1 photometric indices. To find out whether the horizontal branch stars in actual clusters show the same characteristics, we have obtained spectra of stars in M3 and in M13. Initial results of classifying these stars support our earlier findings for the FHB stars. We present some atmospheric modelling as our first attempt to understand the parameters of this kind of near-A0, horizontal branch star.

  2. Horizontes de significado y metamorfosis óntica: Sobre el destino de un diálogo roto

    OpenAIRE

    Blanco Ilari, Juan; Comisión Nacional de Investigaciones Científicas y Técnicas

    2015-01-01

    En este trabajo analizó la brecha que separa el discurso filosófico del discurso cotidiano. La tesis general sostiene que el horizonte de sentido en el que estamos insertos nos compromete con una ontología que, en ocasiones contradice a la ontología develada por la mirada objetiva. Para la contrastación de está hipótesis he seguido un método crítico de análisis semántico y pragmático de algunas categorías centrales en el debate. Esa metodología me llevó a poner en relación universos del discu...

  3. The conduction bands of MgO, MgS and HfO2

    NARCIS (Netherlands)

    Boer, P.K. de; Groot, R.A. de

    1998-01-01

    Electronic structure calculations for MgO, MgS and HfO2 are reported. It is shown that the conduction bands of MgO and MgS have predominantly anion character, contrary to the common picture of the conduction band being derived from cation states. In transition metal oxides, unoccupied anion states

  4. TRPM6 forms the Mg2+ influx channel involved in intestinal and renal Mg2+ absorption.

    NARCIS (Netherlands)

    Voets, T.; Nilius, B.; Hoefs, S.J.G.; Kemp, J.W.C.M. van der; Droogmans, G.; Bindels, R.J.M.; Hoenderop, J.G.J.

    2004-01-01

    Mg2+ is an essential ion involved in a multitude of physiological and biochemical processes and a major constituent of bone tissue. Mg2+ homeostasis in mammals depends on the equilibrium between intestinal Mg2+ absorption and renal Mg2+ excretion, but little is known about the molecular nature of

  5. Mg/Ca ratio in fertilization and agricultural soils, Mg percent of liming ...

    African Journals Online (AJOL)

    Background: Mg is a cofactor in more than 300 enzymatic reactions and its deficiency has been reported to be associated with cardiovascular diseases. Human Mg balance depends on food composition, food processing and Mg variation in foodstuffs, which can be roughly prognostigated by Mg proportion in fertilization and ...

  6. First-principles calculations of perpendicular magnetic anisotropy in Fe1-x Co x /MgO(001) thin films.

    Science.gov (United States)

    Cai, Guanzhi; Wu, Zhiming; Guo, Fei; Wu, Yaping; Li, Heng; Liu, Qianwen; Fu, Mingming; Chen, Ting; Kang, Junyong

    2015-01-01

    The perpendicular magnetic anisotropy (PMA) of Fe1-x Co x thin films on MgO(001) was investigated via first-principles density-functional calculations. Four different configurations were considered based on their ground states: Fe/MgO, Fe12Co4/MgO, Fe10Co6/MgO, and Fe8Co8/MgO. As the Co composition increases, the amplitude of PMA increases first from Fe/MgO to Fe12Co4/MgO, and then decreases in Fe10Co6/MgO; finally, the magnetic anisotropy becomes horizontal in Fe8Co8/MgO. Analysis based on the second-order perturbation of the spin-orbit interaction was carried out to illustrate the contributions from Fe and Co atoms to PMA, and the differential charge density was calculated to give an intuitive comparison of 3d orbital occupancy. The enhanced PMA in Fe12Co4/MgO is ascribed to the optimized combination of occupied and unoccupied 3d states around the Fermi energy from both interface Fe and Co atoms, while the weaker PMA in Fe10Co6/MgO is mainly attributed to the modulation of the interface Co-d xy orbital around the Fermi energy. By adjusting the Co composition in Fe1-x Co x , the density of states of transitional metal atoms will be modulated to optimize PMA for future high-density memory application.

  7. Statistical Mechanics of Modularity and Horizontal Gene Transfer

    Science.gov (United States)

    Deem, Michael W.

    2013-04-01

    Biological structure organizes over evolutionary timescales. This review discusses the spontaneous emergence of hierarchical structure in biology as a result of environmental change. A body of theoretical and experimental work on evolutionary dynamics is reviewed, and a theory for these results based on a principle of least action is discussed. The structure that has emerged in biology is complementary to a type of evolutionary dynamics known as horizontal gene transfer. How horizontal gene transfer ameliorates the difficulty that finite populations would otherwise have to evolve on rugged fitness landscapes is also discussed.

  8. FLOW DISTRIBUTION IN A SOLAR COLLECTOR PANEL WITH HORIZONTAL FINS

    DEFF Research Database (Denmark)

    Fan, Jianhua; Shah, Louise Jivan; Furbo, Simon

    2005-01-01

    The objective of this work is to theoretically and experimentally investigate the flow and temperature distribution in a solar collector panel with an absorber consisting of horizontal fins. Fluid flow and heat transfer in the collector panel are studied by means of computational fluid dynamics...... (CFD) calculations. Further, experimental investigations of a 12.5 m² solar collector panel with 16 parallel connected horizontal fins are carried out. The flow distribution through the absorber is evaluated by means of temperature measurements on the backside of the absorber tubes. The measured...

  9. mRNA expression and localization of bNOS, eNOS and iNOS in human cervix at preterm and term labour

    Directory of Open Access Journals (Sweden)

    Byström Birgitta

    2005-08-01

    Full Text Available Abstract Background Preterm birth is the primary cause of the neonatal mortality and morbidity. There will be no preterm birth without a cervical softening. Nitric oxide (NO is shown to be a mediator of term cervical ripening. The aim of this study was to investigate mRNA expression of the three isomers of NO synthases (NOS and to identify them by immunohistochemistry in the human cervix at preterm birth compared to term. Methods The three isomers of NOS- inducible (iNOS, endothelial (eNOS and neuronal (bNOS – were investigated in the human cervix. The expression of mRNA was determined using Real-Time Multiplex RT-PCR. The localisation of synthases in the cervical tissue was analysed using immunohistochemistry. Cervical biopsies were obtained from 4 groups of women without clinical signs of infection: preterm (PTL, term labour (TL, preterm not in labour (PTnotL and term not in labour (TnotL patients. One-Way ANOVA, Kruskal-Wallis, Student t-test or Mann-Whitney test were applied as appropriate to determine statistically significant differences among the groups. Results Patients in preterm labour had significantly (p Conclusion The mRNA levels were higher in the preterm labour group compared to the women at term labour. The significant increase of the eNOS mRNA expression, from the unripe to the favourable cervical state during labour, may indicate a role of eNOS and supports the role of NO in the cervical ripening process. All the three synthases were identified by immunohistochemistry in all the groups of study.

  10. Construction of horizontal stratum landform-like composite foams and their methyl orange adsorption capacity

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Jiajia; Shi, Xiaowen; Zhan, Yingfei; Qiu, Xiaodan; Du, Yumin; Deng, Hongbing, E-mail: hbdeng@whu.edu.cn

    2017-03-01

    Highlights: • CS/REC/CNTs composite foams were prepared by unidirectional freeze-casting. • Horizontal stratum landform-like structure was successful built up in foam. • The addition of REC and CNTs promoted the mechanical properties of foam. • The introduction of REC and CNTs enhanced the adsorption capacity of foam on dye. - Abstract: Chitosan (CS)/rectorite (REC)/carbon nanotubes (CNTs) composite foams with good mechanical properties were successfully fabricated by unidirectional freeze-casting technique. The morphology of the foam showed the well-ordered porous three-dimensional layers and horizontal stratum landform-like structure. The holes on the layers looked like the wings of butterfly. Additionally, the X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy results indicated the successful addition of CNTs and REC. The intercalated REC with CS chains was confirmed by small-angle X-ray diffraction. The surface structure of the foams was also analyzed by Raman spectroscopy. The adsorption experiments showed that when the mass ratio of CS to REC was 10:1 and CNTs content was 20%, the composite foam performed best in adsorbing low concentration methyl orange, and the largest adsorption capacity was 41.65 mg/g.

  11. Distribuição vertical e horizontal de temperaturas do ar em ambientes protegidos Vertical and horizontal distribution of air temperature in a plastic greenhouse

    Directory of Open Access Journals (Sweden)

    Raquel A. Furlan

    2002-04-01

    Full Text Available Este trabalho foi realizado na área experimental do Departamento de Engenharia Rural da Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, SP, Brasil, em dois ambientes protegidos construídos no sentido leste-oeste, com área total de 112 m² e coberto com plástico (150 micra, tratado contra raios ultravioleta. Para caracterizar a distribuição espacial da temperatura do ar no ambiente protegido, instalaram-se termopares (cobre-constantã formando malhas, com espaçamento horizontal entre eles de 3,0 m e nas alturas de 0,5, 1,0, 2,0, 3,0 e 4,0 m em relação ao solo. Os dados foram armazenados a cada 15 min por sistemas automáticos de aquisição de dados nos ambientes protegidos. O sistema de nebulização constituiu-se de duas linhas com 70 bocais totais, instalados a uma altura de 3,0 m, utilizando-se uma pressão de trabalho de 200 kPa. A nebulização não afetou o gradiente vertical de temperatura, que manteve a tendência de aumento de temperatura com a altura, em relação ao nível do solo, enquanto o efeito na redução de temperatura pelo sistema de nebulização somente foi eficaz durante a realização da mesma. Para a representação da distribuição espacial de temperatura do ar no ambiente protegido nos diferentes níveis de altura, construiu-se superfícies isotérmicas a partir dos resultados. Verifica-se que a nebulização apresentou maior efeito na homogeneização da distribuição de temperatura no ambiente protegido no nível referente a 2,0 m de altura, em relação ao solo.This work was conducted in the experimental area of the Department of Rural Engineering of "Escola Superior de Agricultura Luiz de Queiroz", University of São Paulo, Piracicaba, São Paulo, Brazil. Two greenhouses were installed in the east-west direction, with 6.4 m of width, 17.5 m of length and 3.0 m high, with total area of 112 m²; covered by plastic of 150 micra thickness, treated against ultra violet rays. To characterize the

  12. Using a Professional Development Program for Enhancing Chilean Biology Teachers' Understanding of Nature of Science (NOS) and Their Perceptions About Using History of Science to Teach NOS

    Science.gov (United States)

    Pavez, José M.; Vergara, Claudia A.; Santibañez, David; Cofré, Hernán

    2016-05-01

    A number of authors have recognized the importance of understanding the nature of science (NOS) for scientific literacy. Different instructional strategies such as decontextualized, hands-on inquiry, and history of science (HOS) activities have been proposed for teaching NOS. This article seeks to understand the contribution of HOS in enhancing biology teachers' understanding of NOS, and their perceptions about using HOS to teach NOS. These teachers ( N = 8), enrolled in a professional development program in Chile are, according to the national curriculum, expected to teach NOS, but have no specific NOS and HOS training. Teachers' views of NOS were assessed using the VNOS-D+ questionnaire at the beginning and at the end of two modules about science instruction and NOS. Both the pre- and the post-test were accompanied by interviews, and in the second session we collected information about teachers' perceptions of which interventions had been more significant in changing their views on NOS. Finally, the teachers also had to prepare a lesson plan for teaching NOS that included HOS. Some of the most important study results were: significant improvements were observed in teachers' understanding of NOS, although they assigned different levels of importance to HOS in these improvements; and although the teachers improved their understanding of NOS, most had difficulties in planning lessons about NOS and articulating historical episodes that incorporated NOS. The relationship between teachers' improved understanding of NOS and their instructional NOS skills is also discussed.

  13. Sildenafil promotes eNOS activation and inhibits NADPH oxidase in the transgenic sickle cell mouse penis.

    Science.gov (United States)

    Musicki, Biljana; Bivalacqua, Trinity J; Champion, Hunter C; Burnett, Arthur L

    2014-02-01

    Sickle cell disease (SCD)-associated vasculopathy in the penis is characterized by aberrant nitric oxide and phosphodiesterase (PDE) 5 signaling, and by increased oxidative stress. Preliminary clinical trials show that continuous treatment with PDE5 inhibitor sildenafil unassociated with sexual activity decreases priapic activity in patients with SCD. However, the mechanism of its vasculoprotective effect in the penis remains unclear. We evaluated whether continuous administration of PDE5 inhibitor sildenafil promotes eNOS function at posttranslational levels and decreases superoxide-producing enzyme NADPH oxidase activity in the sickle cell mouse penis. SCD transgenic mice were used as an animal model of SCD. WT mice served as controls. Mice received treatment with the PDE5 inhibitor sildenafil (100 mg/kg/day) or vehicle for 3 weeks. eNOS phosphorylation on Ser-1177 (positive regulatory site), eNOS interactions with heat-shock protein 90 (HSP90) (positive regulator), phosphorylated AKT (upstream mediator of eNOS phosphorylation on Ser-1177), an NADPH oxidase catalytic subunit gp91(phox), and a marker of oxidative stress (4-hydroxy-2-nonenal [HNE]) were measured by Western blot. Effect of continuous sildenafil treatment on eNOS posttranslational activation, NADPH oxidase catalytic subunit, and oxidative stress in the penis of the sickle cell mouse. Continuous treatment with sildenafil reversed (P penis. Sildenafil treatment of WT mice did not affect any of these parameters. Our findings that sildenafil enhances eNOS activation and inhibits NADPH oxidase function in the sickle cell mouse penis offers a vasculoprotective molecular basis for the therapeutic effect of sildenafil in the penis in association with SCD. © 2013 International Society for Sexual Medicine.

  14. Correção cirúrgica do estrabismo horizontal em portadores de alta miopia Surgical correction of horizontal strabismus in high myopia patients

    Directory of Open Access Journals (Sweden)

    Fábio Ejzenbaum

    2001-04-01

    Full Text Available Objetivo: Análise dos resultados cirúrgicos da correção dos estrabismos horizontais em portadores de alta miopia, em pacientes do Departamento de Oftalmologia da Santa Casa de Misericórdia de São Paulo. Métodos: Foram estudados os prontuários de 24 pacientes esotrópicos e 17 exotrópicos, portadores de miopia maior que 6,00 DE operados para correção do estrabismo. Consideramos como bons resultados cirúrgicos desvios residuais entre esotropia e exotropia de 10delta. Resultados: Observou-se grande incidência de maus resultados entre os pacientes esotrópicos altos míopes. Conclusão: Concluímos que existe uma tendência a piores resultados cirúrgicos nos pacientes esotrópicos com miopia maior que -6,00 DE, em comparação com esotrópicos com erro refrativo entre -0,75 DE e +3,50 DE.Purpose: To analyze results of correction of horizontal strabismus surgical in high myopia patients. Methods: A retrospective chart review of 24 patients with esotropia and high myopia (greater than -6.00 spherical diopters and 17 patients with exotropia and high myopia compared with their control groups. Deviation between 10delta of esotropia and 10delta of exotropia was considered a surgical success. Results: We noticed a high incidence of bad results among the esotropic patients with high myopia. Conclusion: There is a tendency of bad results among the esotropic patients with myopia greater than -6.00 when compared with patients with spherical refractive error between -0.75 and +3.50.

  15. Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal Estimates of solar radiation components on a tilted surface based on global horizontal radiation

    Directory of Open Access Journals (Sweden)

    Adilson P. Souza

    2011-03-01

    Full Text Available Foram avaliadas equações estatísticas de estimativas com agrupamentos de dados anuais e mensais e suas respectivas validações, para as componentes global, direta e difusa da radiação solar incidente em superfícies inclinadas a 12,85, 22,85 e 32,85º, com face para o Norte, nas condições climáticas e geográficas de Botucatu, SP. Empregou-se as frações das três componentes da radiação a do topo da atmosfera em correlação com o coeficiente de transmissividade atmosférica do plano horizontal, em uma base de dados de abril/1998 a dezembro/2007, cujas medidas nas três inclinações ocorreram em diferentes períodos, todavia concomitantes ao plano horizontal. O aumento do ângulo de inclinação da superfície propiciou aumento do espalhamento dos valores diários do índice de claridade para superfícies inclinada e horizontal. Nos agrupamentos anuais os piores desempenhos foram verificados na estimativa da radiação difusa diária para superfície inclinada, com valores máximos de espalhamentos iguais a 3,89 MJ m-2 d-1 (43,65% e ajustamento em torno de 62%. Na estimativa das componentes global e direta da radiação solar nos planos inclinados, podem ser aplicadas, tanto as equações anuais como as mensais, com desempenhos dependentes das condições climáticas.Statistics equations and validations with groups of annual and monthly data were evaluated for global, direct and diffuse solar radiation components incident on the tilted surface to 12.85, 22.85 and 32.85° with the face North, in climate and geographical conditions of Botucatu, SP. It was employed the fractions of three components of extraterrestrial radiation in correlation with the coefficient clearness index horizontal plane, in a database of April/1998 to December/2007, whose measures at different periods in three inclinations, however concomitant to the horizontal plane. Increasing the angle of the surface led to increased scattering of the daily values of

  16. Distúrbios musculoesqueléticos em trabalhadores do setor saúde de Belo Horizonte, Minas Gerais, Brasil Musculoskeletal disorders among healthcare workers in Belo Horizonte, Minas Gerais State, Brazil

    Directory of Open Access Journals (Sweden)

    Rose Elizabeth Cabral Barbosa

    2012-08-01

    Full Text Available Estudo transversal que investigou a prevalência de distúrbios musculoesqueléticos e os fatores associados em uma amostra de 1.808 sujeitos do universo de 13.602 trabalhadores do sistema municipal de saúde de Belo Horizonte, Minas Gerais, Brasil. A prevalência foi avaliada com base no autorrelato de dor nos membros superiores, membros inferiores e dorso; a magnitude das associações foi estimada por meio da regressão de Poisson, em modelos univariados (p This cross-sectional study investigated the prevalence of musculoskeletal disorders and associated factors in a sample of 1,808 workers (from a total of 13,602 in the municipal health system in Belo Horizonte, Minas Gerais State, Brazil. Prevalence was calculated according to self-reported pain in the upper or lower limbs and/or back, and size of associations was estimated by univariate (p < 0.20 and multivariate Poisson regression (p < 0.05. Musculoskeletal disorders showed a prevalence of 49.9% and were statistically associated with female gender, living with a partner, physical activity less than twice a week, self-reported common mental disorder, certain job positions (dentists, dental technicians, and community health workers, high physical demand, and inadequate working conditions. The results confirm the complexity of musculoskeletal disorders and suggest areas for development of health promotion programs in health services.

  17. Perfil de utilização de fitoterápicos em farmácias comunitárias de Belo Horizonte sob a influência da legislação nacional

    Directory of Open Access Journals (Sweden)

    A.Q. Ribeiro

    Full Text Available Um panorama do consumo de fitoterápicos em farmácias comunitárias de Belo Horizonte (MG é utilizado neste artigo como instrumento para analisar a influência da legislação nacional sobre este mercado. Para tal, foram entrevistados indivíduos que adquiriram fitoterápicos nos estabelecimentos farmacêuticos visitados. Observa-se que, na mesma nação detentora da maior biodiversidade do planeta e privilegiada por uma cultura popular conhecedora das propriedades terapêuticas das plantas, existe uma tendência de mercado para a utilização de plantas exóticas, oriundas de países desenvolvidos. A influência da legislação brasileira de fitoterápicos, que prima pela qualidade, eficácia e segurança desses medicamentos, mas que, ao mesmo tempo, tende a proscrever as drogas nativas que fazem parte da medicina popular brasileira, é discutida nesse trabalho. Verifica-se, assim, a pertinência de se discutir o perfil de usuário de fitoterápicos à luz das normas de registro desses fármacos no país no campo da saúde pública, tendo em vista que essa legislação repercute nas estratégias e/ou empecilhos para aumentar o acesso a medicamentos pela população.

  18. Mg Isotopes of USGS Igneous Rock Standards

    Science.gov (United States)

    Huang, F.; Glessner, J. J.; Lundstrom, C. C.

    2008-12-01

    Magnesium has three stable isotopes, 24Mg, 25Mg, and 26Mg with abundances of 78.99%, 10.00%, and 11.01%, respectively. It is one of the most abundant elements in the crust and mantle. As advancements of analytical techniques using MC-ICP-MS have dramatically advanced our ability to measure isotope ratios of Mg with greater precision, Mg isotopes can now be applied to study a variety of fundamental geological processes, such as continental crust weathering, chemical diffusion, and chondrule formation. Therefore the need for well characterized Mg isotope ratios for geological materials is increasingly important. Routine measurement of readily-available USGS rock standards is a viable way for inter-lab comparison to show the quality of data. However, the Mg isotope data for USGS standards reported in the literature are limited and inconsistent. USGS standards reported by different MC-ICP-MS labs have a range of Mg isotopic data outside of the normal external error of 0.1‰ (2σ). Mg isotopes of USGS igneous rock standards (dunite, DTS-1; basalts, BCR-1, BCR-2, BHVO-1; and andesite, AGV-1) were measured by a sample-standard bracketing method using a low resolution MC-ICP- MS (Nu-Plasma HR). The method has a large tolerance of matrix bias with Na/Mg and Al/Mg > 100% only changing the δ26Mg by less than 0.1‰. Dilution effects do not cause significant error (99.5%) and acceptable concentrations of matrix (mainly Na, Al, Ca, and Fe) are included in these results. Duplicate analyses of independently processed standards yielded the following results (δ26MgDSM-3 (‰)): BCR-2 (-0.306±0.144, - 0.290±0.116, -0.283±0.048, -0.288±0.057), BCR-1 (-0.399±0.079, -0.346±0.046), AGV-1 (-0.295±0.110, -0.307±0.086, -0.339±0.068), BHVO-1 (-0.308±0.076, - 0.299±0.103), and DTS-1 (-0.299±0.163, -0.368±0.059). δ26MgDSM-3 of measured USGS standards are consistent within error (2σ).

  19. Thalidomide attenuates the development and expression of antinociceptive tolerance to μ-opioid agonist morphine through l-arginine-iNOS and nitric oxide pathway.

    Science.gov (United States)

    Khan, Muhammad Imran; Ostadhadi, Sattar; Mumtaz, Faiza; Momeny, Majid; Moghaddaskho, Farima; Hassanipour, Mahsa; Ejtemaei-Mehr, Shahram; Dehpour, Ahmad Reza

    2017-01-01

    Morphine is a μ-opioid analgesic drug which is used in the treatment and management of chronic pain. However, due to development of antinociceptive tolerance its clinical use is limited. Thalidomide is an old glutamic acid derivative which recently reemerged because of its potential to counteract a number of disorders including neurodegenerative disorders. The potential underlying mechanisms and effects of thalidomide on morphine-induced antinociceptive tolerance is still elusive. Hence, the present study was designed to explore the effect of thalidomide on the development and expression of morphine antinociceptive tolerance targeting l-arginine-nitric oxide (NO) pathway in mice and T98G human glioblastoma cell line. When thalidomide was administered in a dose of 17.5mg/kg before each dose of morphine chronically for 5days it prevented the development of antinociceptive tolerance. Also, a single dose of thalidomide 20mg/kg attenuated the expression phase of antinociceptive tolerance. The protective effect of thalidomide was augmented in development phase when co-administration with NOS inhibitors like L-NAME (non- selective NOS inhibitor; 2mg/kg) or aminoguanidine (selective inducible NOS inhibitor; 50mg/kg). Also, the reversal effect of thalidomide in expression phase was potentiated when concomitantly administrated with L-NAME (5mg/kg) or aminoguanidine (100mg/kg). Co-administration of ODQ (a guanylyl cyclase inhibitor) 10mg/kg in developmental phase or 20mg/kg in expression phase also progressively increased the pain threshold. In addition, thalidomide (20μM) also significantly inhibited the overexpression of iNOS gene induced by morphine (2.5μM) in T98G cell line. Hence, our findings suggest that thalidomide has protective effect both in the development and expression phases of morphine antinociceptive tolerance. It is also evident that this effect of thalidomide is induced by the inhibition of NOS enzyme predominantly iNOS. Copyright © 2016 Elsevier Masson

  20. Freight transportation efficiency through horizontal cooperation in flanders

    NARCIS (Netherlands)

    Cruijssen, Frans; Dullaert, Wout; Joro, Tarja

    This paper describes a practical application of data envelopment analysis (DEA) to the Flemish road transportation sector.The efficiency of 82 road transportation companies responding to a large-scale survey focused on horizontal cooperation is evaluated, based on two inputs and two outputs.Various

  1. Analysis of horizontal axis wind turbine blade using CFD | Nigam ...

    African Journals Online (AJOL)

    Blade is very essential part of HAWT (horizontal axis wind turbine). Forces for Lift and drag on the blade has an important role in the wind turbine performance. The main purpose of this work is to perform CFD analysis of a blade and airfoil of wind turbine using k-ω SST model. In this present study NACA 634 -221 airfoil ...

  2. The Horizontal Branch of the Sculptor Dwarf galaxy

    NARCIS (Netherlands)

    Salaris, Maurizio; de Boer, Thomas; Tolstoy, Eline; Fiorentino, Giuliana; Cassisi, Santi

    2013-01-01

    We have performed the first detailed simulation of the horizontal branch of the Sculptor dwarf spheroidal galaxy by means of synthetic modelling techniques, taking consistently into account the star formation history and metallicity evolution as determined from the main sequence and red giant branch

  3. Potential Effects of Horizontal Gene Exchange in the Human Gut

    Directory of Open Access Journals (Sweden)

    Aaron Lerner

    2017-11-01

    Full Text Available Many essential functions of the human body are dependent on the symbiotic microbiota, which is present at especially high numbers and diversity in the gut. This intricate host–microbe relationship is a result of the long-term coevolution between the two. While the inheritance of mutational changes in the host evolution is almost exclusively vertical, the main mechanism of bacterial evolution is horizontal gene exchange. The gut conditions, with stable temperature, continuous food supply, constant physicochemical conditions, extremely high concentration of microbial cells and phages, and plenty of opportunities for conjugation on the surfaces of food particles and host tissues, represent one of the most favorable ecological niches for horizontal gene exchange. Thus, the gut microbial system genetically is very dynamic and capable of rapid response, at the genetic level, to selection, for example, by antibiotics. There are many other factors to which the microbiota may dynamically respond including lifestyle, therapy, diet, refined food, food additives, consumption of pre- and probiotics, and many others. The impact of the changing selective pressures on gut microbiota, however, is poorly understood. Presumably, the gut microbiome responds to these changes by genetic restructuring of gut populations, driven mainly via horizontal gene exchange. Thus, our main goal is to reveal the role played by horizontal gene exchange in the changing landscape of the gastrointestinal microbiome and potential effect of these changes on human health in general and autoimmune diseases in particular.

  4. Impact of petroleum industry horizontal divestiture on the coal market

    Energy Technology Data Exchange (ETDEWEB)

    Zimmerman, D.L.; Dymond, L.H.; Marris, R.L.

    1979-06-22

    Volume 2 contains appendices as follows: coal supply curves, coal supply model modifications, coal mine financing data, legislative proposals for horizontal divestiture, overview of oil companies in coal industry (including their coal reserves) and the major sources of data and bibliography. (LTN)

  5. Horizontal transfer of genetic elements in the black Aspergilli

    NARCIS (Netherlands)

    Diepeningen, van A.D.

    1999-01-01

    The thesis deals with the horizontal transfer of genetic elements in the black Aspergilli . The black Aspergilli form a complex group of asexual species. All share a characteristic black conidiospore color and the ability to efficiently degrade

  6. On the Acquisition of Understanding that Still Water is Horizontal

    Science.gov (United States)

    Thomas, Hoben; Jamison, Wesley

    1975-01-01

    Reports on three studies which investigated the development of the concept of horizontality in subjects from nursey school through college age. Normative data collected allowed for evaluation of Piaget's stages and for differences due to age, sex, and apparatus shape and orientation. (ED)

  7. Widespread horizontal transfer of mitochondrial genes in flowering plants.

    Science.gov (United States)

    Bergthorsson, Ulfar; Adams, Keith L; Thomason, Brendan; Palmer, Jeffrey D

    2003-07-10

    Horizontal gene transfer--the exchange of genes across mating barriers--is recognized as a major force in bacterial evolution. However, in eukaryotes it is prevalent only in certain phagotrophic protists and limited largely to the ancient acquisition of bacterial genes. Although the human genome was initially reported to contain over 100 genes acquired during vertebrate evolution from bacteria, this claim was immediately and repeatedly rebutted. Moreover, horizontal transfer is unknown within the evolution of animals, plants and fungi except in the special context of mobile genetic elements. Here we show, however, that standard mitochondrial genes, encoding ribosomal and respiratory proteins, are subject to evolutionarily frequent horizontal transfer between distantly related flowering plants. These transfers have created a variety of genomic outcomes, including gene duplication, recapture of genes lost through transfer to the nucleus, and chimaeric, half-monocot, half-dicot genes. These results imply the existence of mechanisms for the delivery of DNA between unrelated plants, indicate that horizontal transfer is also a force in plant nuclear genomes, and are discussed in the contexts of plant molecular phylogeny and genetically modified plants.

  8. Pervasive horizontal transfer of rolling-circle transposons among animals.

    Science.gov (United States)

    Thomas, Jainy; Schaack, Sarah; Pritham, Ellen J

    2010-01-01

    Horizontal transfer (HT) of genes is known to be an important mechanism of genetic innovation, especially in prokaryotes. The impact of HT of transposable elements (TEs), however, has only recently begun to receive widespread attention and may be significant due to their mutagenic potential, inherent mobility, and abundance. Helitrons, also known as rolling-circle transposons, are a distinctive subclass of TE with a unique transposition mechanism. Here, we describe the first evidence for the repeated HT of four different families of Helitrons in an unprecedented array of organisms, including mammals, reptiles, fish, invertebrates, and insect viruses. The Helitrons present in these species have a patchy distribution and are closely related (80-98% sequence identity), despite the deep divergence times among hosts. Multiple lines of evidence indicate the extreme conservation of sequence identity is not due to selection, including the highly fragmented nature of the Helitrons identified and the lack of any signatures of selection at the nucleotide level. The presence of horizontally transferred Helitrons in insect viruses, in particular, suggests that this may represent a potential mechanism of transfer in some taxa. Unlike genes, Helitrons that have horizontally transferred into new host genomes can amplify, in some cases reaching up to several hundred copies and representing a substantial fraction of the genome. Because Helitrons are known to frequently capture and amplify gene fragments, HT of this unique group of DNA transposons could lead to horizontal gene transfer and incur dramatic shifts in the trajectory of genome evolution.

  9. A modified calculation model for groundwater flowing to horizontal ...

    Indian Academy of Sciences (India)

    Corresponding author. e-mail: wangweichd@chd.edu.cn. The simulation models for groundwater flowing to horizontal seepage wells proposed by Wang and Zhang. (2007) are based on the theory of coupled seepage-pipe flow model which treats the well pipe as a highly permeable medium. However, the limitations of the ...

  10. Horizontal and Vertical Attentional Orienting in Parkinson's Disease

    Science.gov (United States)

    Nys, Gudrun M. S.; Santens, Patrick; Vingerhoets, Guy

    2010-01-01

    Patients with Parkinson's disease (PD) typically suffer from an asymmetric degeneration of dopaminergic cells in the substantia nigra, resulting in right-sided (RPD) or left-sided (LPD) predominance of motor symptomatology. As the dopaminergic system is also involved in attention, we examined horizontal and vertical orienting of attention in LPD…

  11. Viscous dissipation effect on the flow through a horizontal porous ...

    African Journals Online (AJOL)

    This work investigates the flow of fluid through a horizontal channel filled with a porous media with a temperature dependent viscosity. The influence of Darcy number on the velocity and temperature was thoroughly investigated. It is observed that high Darcy number leads to a higher velocity and that velocity is parabolic ...

  12. Analysis of horizontal axis wind turbine blade using CFD

    African Journals Online (AJOL)

    A Pareto optimal multi-objective optimization for a horizontal axis wind turbine blade airfoil sections utilizing exergy analysis and neural networks. Journal of Wind Engineering and Industrial. Aerodynamics, Vol. 136, pp.62–72. Rajakumar S., Ravindran D. 2011 Iterative approach for optimising coefficient of power, coefficient ...

  13. Horizontal angle of inclination of the Mandibular condyle in a ...

    African Journals Online (AJOL)

    The horizontal angle of inclination, is important in maintaining the function of the temporomandibular joint. It should be maintained in the manufacture of condylar prostheses since deviation may lead to disk displacement and degeneration of the articular fossa. While inter-population variations exist in mandibular ...

  14. Insights into horizontal acquisition patterns of dormancy and ...

    Indian Academy of Sciences (India)

    2016-07-22

    Jul 22, 2016 ... Horizontal Gene Transfer (HGT) events, initially thought to be rare in Mycobacterium tuberculosis, have recently been shown to be involved in the acquisition of virulence operons in M. tuberculosis. We have developed a new partitioning framework based HGT prediction algorithm, called Grid3M, and ...

  15. Insights into horizontal acquisition patterns of dormancy and ...

    Indian Academy of Sciences (India)

    Horizontal Gene Transfer (HGT) events, initially thought to be rare in Mycobacterium tuberculosis, have recentlybeen shown to be involved in the acquisition of virulence operons in M. tuberculosis. We have developed a newpartitioning framework based HGT prediction algorithm, called Grid3M, and applied the same for the ...

  16. Flow Through A Horizontal Porous Channel With A Harmonic ...

    African Journals Online (AJOL)

    In this research work we provide a finite element solution to the problem of the flow through a horizontal channel with a harmonic pressure gradient. Results obtained shows that the ... due to the viscous dissipation effect. Keywords: Asymptotic techniques, Maxwell fluid, constantly accelerating plates and velocity fields.

  17. Horizontal and vertical projectile motion in a resistant medium under ...

    African Journals Online (AJOL)

    Horizontal and vertical projectile motion in a resistant medium under the influence of magnetic field is carried out. Solutions to the governing equations is developed using integrating factor method. The results are in reasonable agreement with the findings of [2] and [3] JONAMP Vol. 11 2007: pp. 83-86 ...

  18. Deposition of a fine powder in horizontal pipelines and bends

    NARCIS (Netherlands)

    Reuvekamp, RJ; Ray, MB; Hoffmann, AC

    The deposition of a very fine powder in a horizontal, lean-phase pneumatic conveying conduit containing a 90degrees bend has been studied experimentally. The total deposition and the deposition pattern were studied as a function of superficial gas velocity, solids loading and bend geometry: one

  19. Performance of a Horizontal Triple Cylinder Type Pulping Machine

    Directory of Open Access Journals (Sweden)

    Sukrisno Widyotomo

    2011-05-01

    Full Text Available Pulping is one important step in wet coffee processing method. Pulping process usually uses a machine which constructed by wood or metal materials. A horizontal single cylinder type of fresh coffee cherries pulping machine is the most popular machine in coffee processing. One of the weaknesses of a horizontal single cylinder type of fresh coffee cherries pulping machine is higher in broken beans. Broken bean is one of mayor aspects in defect system that contribute to low quality. Indonesian Coffee and Cocoa Research Institute has designed and tested a horizontal double cylinder type of fresh coffee cherries pulping machine which resulted in 12.6—21.4% of broken beans. To reduce percentage of broken beans, Indonesian Coffee and Cocoa Research Institute has developed and tested a horizontal triple cylinder type of fresh coffee cherries pulping machine. Material tested was fresh mature Robusta coffee cherries, 60—65% (wet basis moisture content; has classified on 3 levels i.e. unsorted, small and medium, and clean from metal and foreign materials. The result showed that the machine produced 6,340 kg/h in optimal capacity for operational conditions, 1400 rpm rotor rotation speed for unsorted coffee cherries with composition 55.5% whole parchment coffee, 3.66% broken beans, and 1% beans in wet skin.Key words : coffee, pulp, pulper, cylinder, quality.

  20. Numerical modeling of secondary side thermohydraulics of horizontal steam generator

    Energy Technology Data Exchange (ETDEWEB)

    Melikhov, V.I.; Melikhov, O.I.; Nigmatulin, B.I. [Research and Engineering Centre of LWR Nuclear Plants Safety, Moscow (Russian Federation)

    1995-12-31

    A mathematical model for the transient three-dimensional secondary side thermal hydraulics of the horizontal steam generator has been developed. The calculations of the steam generator PGV-1000 and PGV-4 nominal regimes and comparison of numerical and experimental results have been carried out. 7 refs.

  1. Changes in intraocular pressure and horizontal pupil diameter ...

    African Journals Online (AJOL)

    The objective of this study was to determine the effects of topical 0.5% tropicamide, 1% atropine sulphate and 10% phenylephrine hydrochloride ophthalmic solutions on intraocular pressure (IOP) and horizontal pupil diameter (HPD) in the dog during the first hour after treatment. Forty clinically and ophthalmologically ...

  2. Horizontal muon flux measured with the LVD detector at LNGS

    Energy Technology Data Exchange (ETDEWEB)

    Garbini, Marco, E-mail: garbini@bo.infn.it [Museo Storico della Fisica e Centro Studi e Ricerche ' E. Fermi' Roma and INFN Bologna (Italy)

    2011-12-15

    We report the measure of underground horizontal (cos({theta})<0.3) muon flux with the Large Volume Detector (LVD) at the I.N.F.N. Gran Sasso National Laboratory. The analysis is based on the whole muon data collected by LVD since start of data taking in 1992.

  3. Studying plasmid horizontal transfer in situ: a critical review

    DEFF Research Database (Denmark)

    Sørensen, Søren Johannes; Bailey, Mark; Hansen, Lars Hestbjerg

    2005-01-01

    This review deals with the prospective, experimental documentation of horizontal gene transfer (HGT) and its role in real-time, local adaptation. We have focused on plasmids and their function as an accessory and/or adaptive gene pool. Studies of the extent of HGT in natural environments have...

  4. Global Analysis of Horizontal Gene Transfer in Fusarium verticillioides

    Science.gov (United States)

    The co-occurrence of microbes within plants and other specialized niches may facilitate horizontal gene transfer (HGT) affecting host-pathogen interactions. We recently identified fungal-to-fungal HGTs involving metabolic gene clusters. For a global analysis of HGTs in the maize pathogen Fusarium ve...

  5. A fala de adolescentes marginais em Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Vera Lúcia Menezes de Oliveira Paiva

    2012-02-01

    Full Text Available Th1s paper discusses some research resulta on sex differences ln the speech of homeless adolescents ln Belo Horizonte. The study showed that male speakers use more standard forms than female speakers, although the inicial hypothesis predicted that groups with a great many characteristics ln common would present little d1fferences concerning prestige forms.

  6. The 'horizontal direct effect' of EU international agreements

    DEFF Research Database (Denmark)

    Gáspár-Szilágyi, Szilárd

    2015-01-01

    in proceedings involving private individuals/professionals against the private regulatory bodies of a profession or a State owned and controlled entity. However, direct effect has not yet been expressly confirmed in cases involving veritable horizontal relationships, between private parties of equal positions...

  7. Warm season performance of horizontal subsurface flow constructed ...

    African Journals Online (AJOL)

    Warm season performance of horizontal subsurface flow constructed wetlands vegetated with rice treating water from an urban stream polluted with sewage. ... Constructed wetlands demonstrated a very good performance in removing organic matter, fecal indicator microorganisms and nutrients from the influent ...

  8. Models for prediction of global solar radiation on horizontal surface ...

    African Journals Online (AJOL)

    The estimation of global solar radiation continues to play a fundamental role in solar engineering systems and applications. This paper compares various models for estimating the average monthly global solar radiation on horizontal surface for Akure, Nigeria, using solar radiation and sunshine duration data covering years ...

  9. models for prediction of global solar radiation on horizontal surface ...

    African Journals Online (AJOL)

    2016-10-12

    Oct 12, 2016 ... The estimation of global solar radiation continues to play a fundamental role in solar engineering systems and applications. This paper compares various models for estimating the average monthly global solar radiation on horizontal surface for Akure, Nigeria, using solar radiation and sunshine duration ...

  10. A modified calculation model for groundwater flowing to horizontal ...

    Indian Academy of Sciences (India)

    The simulation models for groundwater flowing to horizontal seepage wells proposed by Wang and Zhang (2007) are based on the theory of coupled seepage-pipe flow model which treats the well pipe as a highly permeable medium. However, the limitations of the existing model were found during applications. Specifically ...

  11. Characteristics of Buoyancy Driven Natural Ventilation through Horizontal Openings

    DEFF Research Database (Denmark)

    Li, Zhigang

    Air flow through horizontal openings is an important issue of mass and energy transfer between different zones in buildings. This kind of mass and energy transfer have important implications regarding energy saving, thermal comfort, control of contaminants, micro-organisms and spread of fire...

  12. Coolant rate distribution in horizontal steam generator under natural circulation

    Energy Technology Data Exchange (ETDEWEB)

    Blagovechtchenski, A.; Leontieva, V.; Mitrioukhin, A. [St. Petersburg State Technical Univ. (Russian Federation)

    1997-12-31

    In the presentation the major factors determining the conditions of NCC (Natural Coolant Circulation) in the primary circuit and in particular conditions of coolant rate distribution on the horizontal tubes of PGV-1000 in NPP with VVER-1000 under NCC are considered. 5 refs.

  13. Determination of horizontal and vertical distribution of tree species in ...

    African Journals Online (AJOL)

    Yomi

    2012-01-24

    Jan 24, 2012 ... using a digital elevation model obtained from Shuttle Radar Topography Mission (SRTM) satellite data and 1/100,000 scale Forest Information System database, horizontal and vertical distribution of Pinus nigra (Crimean Pine), which is geographically the largest spread needled tree species in Turkey, (to.

  14. Jurisprudential Escapism, Horizontal Anxiety and the Right to

    African Journals Online (AJOL)

    NWUuser

    RACE AS/AND THE TRACE OF THE GHOST: JURISPRUDENTIAL ESCAPISM,. HORIZONTAL ANXIETY AND ... other being a critique of its 'race politics' (its background racial ideology). I shall also examine the ..... Property Control Act provided the judge with ample space to vary the terms of the trust provisions in order to ...

  15. Relative Soothing Effects of Vertical and Horizontal Rocking.

    Science.gov (United States)

    Pederson, David R.; And Others

    In this study designed to compare the relative pacifying properties of horizontal and vertical rocking, 13 infants (mean age--58 days) were each tested on two subsequent days. The rocking device was a cradle that could be manipulated to produce side-to-side rocking similar to a commercial cradle or up-and-down rocking. In its up-and-down mode, the…

  16. The Resource-Based Horizontal Acquisition Strategy of JBS

    OpenAIRE

    Ronald Jean Degen

    2012-01-01

    This paper examines the resource-based horizontal acquisition strategy of JBS. This strategy transformed a relatively small business that was founded in 1953 (comprising a butcher shop and small abattoir located in a small town in the interior of Brazil) into the world?s biggest meat producer by 2010.

  17. Increasing of horizontal velocity of particles leaving a belt conveyor

    Science.gov (United States)

    Tavares, Abraão; Faria, Allbens

    2017-06-01

    We investigate the transport of granular materials by a conveyor belt via numerical simulations. We report an unusual increasing of particles horizontal velocity when they leave the belt and initiate free-fall. Using Discrete Elements Method, the mechanism underlying this phenomenon were investigated, and a study on how particle and system properties influences this effect were conducted.

  18. Increasing of horizontal velocity of particles leaving a belt conveyor

    Directory of Open Access Journals (Sweden)

    Tavares Abraão

    2017-01-01

    Full Text Available We investigate the transport of granular materials by a conveyor belt via numerical simulations. We report an unusual increasing of particles horizontal velocity when they leave the belt and initiate free-fall. Using Discrete Elements Method, the mechanism underlying this phenomenon were investigated, and a study on how particle and system properties influences this effect were conducted.

  19. Pressure transient analysis of a horizontal well subject to four ...

    African Journals Online (AJOL)

    Reservoir characterization is essential for effective reservoir and wellbore management. But when a horizontal well is subject to constant-pressure external boundaries, the extent of reservoir characterization that is possible depends on the flow regimes that are encountered in a given flow time. In this paper dimensionless ...

  20. Impact of horizontal resolution on prediction of tropical cyclones over ...

    Indian Academy of Sciences (India)

    Two cyclones, which formed over the Bay of Bengal during the years 1995 and 1997, are simulated using a regional weather prediction model with two horizontal resolutions of 165km and 55 km. The model is found to perform reasonably well towards simulation of the storms. The structure, intensity and track of the cyclones ...

  1. Experimental study of buoyancy driven natural ventilation through horizontal openings

    DEFF Research Database (Denmark)

    Heiselberg, Per; Li, Zhigang

    2007-01-01

    An experimental study of buoyancy driven natural ventilation through single-sided horizontal openings was performed in a full-scale laboratory test rig. Measurements were made for opening ratios L/D range from 0.027 to 4.455, where L and D are the length and the diameter of the opening, respectiv...

  2. Direct Numerical Simulation Sediment Transport in Horizontal Channel

    Energy Technology Data Exchange (ETDEWEB)

    Uhlmann, M.

    2006-07-01

    We numerically simulate turbulent flow in a horizontal plane channel over a bed of mobile particles. All scales of fluid motion are resolved without modeling and the phase interface is accurately represented. Our results indicate a possible scenario for the onset of erosion through collective motion induced by buffer-layer streaks. (Author) 27 refs.

  3. Horizontal and vertical resistance strength of infrazygomatic mini-implants.

    Science.gov (United States)

    Wu, J-H; Lu, P-C; Lee, K-T; Du, J-K; Wang, H-C; Chen, C-M

    2011-05-01

    This study assessed the adequacy of anchorage strength of infrazygomatic mini-implants in vertical and horizontal directions. Each brand of infrazygomatic mini-implant tested provided acceptable skeletal anchorage. Copyright © 2011 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  4. What Factors Underlie Vertical and Horizontal Export Diversification

    African Journals Online (AJOL)

    Ritsumeikan Asia Pacific University

    FDI was found to be a key factor to speed-up vertical and horizontal export diversification in East Asia, but only for vertical ..... Source: Own calculation based on the data obtained from UNCTAD Handbook of Statistics (2004) ... developed abroad, these countries managed to improve their production function substantially in ...

  5. Addressing the issue of horizontal gene transfer from a diet ...

    African Journals Online (AJOL)

    One of these hazards, which have great controversy reports, is the possible horizontal gene transfer from GM-food or feed to human or animal tissues. ... Analysis of the results revealed that: 1) ingested fragments from the CaMV-35S promoter incorporated into blood, liver, and brain tissues of experimental rats, 2) The total ...

  6. Horizontal osteotomy for reconstruction of the narrow edentulous mandible

    NARCIS (Netherlands)

    Raghoebar, GM; Batenburg, RHK; Meijer, HJA; Vissink, A

    The aim of this retrospective study was to evaluate the applicability of a horizontal osteotomy procedure for reconstruction of a narrow edentulous mandible in order to enable insertion of implants. In 7 edentulous patients a narrow inferior alveolar ridge was reconstructed with autogenous bone

  7. Construction of horizontal mining facilities through schist`s massive

    OpenAIRE

    Doneva, Nikolinka; Hadzi-Nikolova, Marija; Mirakovski, Dejan; Mijalkovski, Stojance

    2013-01-01

    This paper presents cost analysis for horizontal mining facilities through schist’s massive. Two variables, headings cross section and rock-quality designation (RQD) were considered. Based on a real data analyses we were able to define two parameters functional relation between costs and cross-section. Examples and clasifications are elaborated in details.

  8. Aplicação materna de glicocorticoide nos parâmetros vitais de cordeiros nascidos a termo e prematuros

    Directory of Open Access Journals (Sweden)

    Larissa Gabriela Avila

    2014-06-01

    Full Text Available O objetivo deste trabalho foi avaliar a influência do glicocorticoide sobre parâmetros vitais de cordeiros nascidos a termo e prematuros, do nascimento às 48 horas de vida. Foram constituídos quatros grupos: PN (cordeiros nascidos de parto normal, n=15, média de 146 dias; PNDEX (cordeiros nascidos de parto normal, cujas mães receberam 16mg de dexametasona aos 141 dias de gestação, n=8, média de 143 dias; PRE (cordeiros prematuros nascidos de cesarianas aos 138 dias de gestação, n=10; e PREDEX (cordeiros prematuros nascidos de cesarianas aos 138 dias de gestação, cujas mães receberam 16mg de dexametasona dois dias antes, n=9. As frequências cardíaca e respiratória variaram ao longo do período, com os maiores valores nos grupos de partos normais. A temperatura retal diminuiu em todos os grupos nos primeiros 60 minutos de vida, sendo os menores valores observados nos cordeiros prematuros, e o escore Apgar foi mais alto nos animais nascidos em tempo gestacional normal. Os cordeiros prematuros apresentaram menor vitalidade e menor taxa de sobrevivência, entretanto, menor taxa de mortalidade foi observada nos prematuros sob influência da dexametasona.

  9. Charge Nurses' Experiences With Horizontal Violence: Implications for Leadership Development.

    Science.gov (United States)

    Longo, Joy; Cassidy, Linda; Sherman, Rose

    2016-11-01

    HOW TO OBTAIN CONTACT HOURS BY READING THIS ISSUE Instructions: 1.2 contact hours will be awarded by Villanova University College of Nursing upon successful completion of this activity. A contact hour is a unit of measurement that denotes 60 minutes of an organized learning activity. This is a learner-based activity. Villanova University College of Nursing does not require submission of your answers to the quiz. A contact hour certificate will be awarded after you register, pay the registration fee, and complete the evaluation form online at http://goo.gl/gMfXaf. In order to obtain contact hours you must: 1. Read the article, "Charge Nurses' Experiences With Horizontal Violence: Implications for Leadership Development," found on pages 493-499, carefully noting any tables and other illustrative materials that are included to enhance your knowledge and understanding of the content. Be sure to keep track of the amount of time (number of minutes) you spend reading the article and completing the quiz. 2. Read and answer each question on the quiz. After completing all of the questions, compare your answers to those provided within this issue. If you have incorrect answers, return to the article for further study. 3. Go to the Villanova website to register for contact hour credit. You will be asked to provide your name, contact information, and a VISA, MasterCard, or Discover card number for payment of the $20.00 fee. Once you complete the online evaluation, a certificate will be automatically generated. This activity is valid for continuing education credit until October 31, 2019. CONTACT HOURS This activity is co-provided by Villanova University College of Nursing and SLACK Incorporated. Villanova University College of Nursing is accredited as a provider of continuing nursing education by the American Nurses Credentialing Center's Commission on Accreditation. OBJECTIVES Describe types of horizontal violence experienced by charge nurses. Identify the skills needed for

  10. Role of MgO impurity on the superconducting properties of MgB{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Singh, Dharmendra Kumar; Tiwari, Brajesh; Jha, Rajveer; Kishan, H.; Awana, V.P.S., E-mail: awana@mail.npindia.org

    2014-10-15

    Highlights: • Multiphase Rietveld refinement and presence of MgO volume fraction in MgB{sub 2}. • Inhomogeneity in superconducting transition of MgB{sub 2} due to hidden MgO. • Diamagnetic and paramagnetic Meissner effect in MgB{sub 2}. - Abstract: We address the effect of MgO impurity on the superconducting properties of MgB{sub 2}. The synthesis of MgB{sub 2} is very crucial because of sensitivity of Mg to oxidation which may lead to MgO as a secondary phase. Rietveld refinement was performed to determine the quantitative volume fraction of MgO in the samples synthesized by two different techniques. Both the samples were subjected to magnetization measurements under dc and a.c. applied magnetic fields and the observed results were compared as a function of temperature. Paramagnetic Meissner effect has been observed in a sample of MgB{sub 2} having more amount of MgO (with T{sub c} = 37.1 K) whereas the pure sample MgB{sub 2} having minor quantity of MgO shows diamagnetic Meissner effect with T{sub c} = 38.8 K. M–H measurements at 10 K reveal a slight difference in irreversibility field which is due to MgO impurity along with wide transition observed from ac magnetic susceptibility measurements. The magnetotransport measurements ρ(T) using ρ{sub N} = 90%, 50% and 10% criterion on pure sample of MgB{sub 2} has been used to determine the upper critical field whereas the sample having large quantity of MgO does not allow these measurements due to its high resistance.

  11. METAFICÇÃO NOS ROMANCES DE MACHADO DE ASSIS

    Directory of Open Access Journals (Sweden)

    Janine Resende Rocha

    2010-05-01

    Full Text Available Nos romances de Machado de Assis, a metaficção é caracterizada de maneira permanente. Este ensaio pretende observar o efeito provocado nessas narrativas pela reflexão do ficcional produzida por elas.

  12. NOAA/NOS and USCGS Seabed Descriptions from Hydrographic Surveys

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA/NOS and USCGS Seabed Descriptions from Hydrographic Surveys database is a compilation of surficial sediment composition from multiple sources for over...

  13. NOS CO-OPS Water Level Data, Verified, Hourly

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has verified (quality-controlled), hourly, water level (tide) data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS)....

  14. NOS CO-OPS Meteorological Data, Visibility, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Visibility data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not been...

  15. NOS CO-OPS Water Level Data, Preliminary, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has recent, preliminary (not quality-controlled), 6-minute, water level (tide) data from NOAA NOS Center for Operational Oceanographic Products and...

  16. NOS CO-OPS Water Level Data, Preliminary, 1-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has recent, preliminary (not quality-controlled), 1-minute, water level (tide) data from NOAA NOS Center for Operational Oceanographic Products and...

  17. NOS CO-OPS Water Level Data, Verified, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has verified (quality-controlled), 6-minute, water level (tide) data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS)....

  18. NOS CO-OPS Meteorological Data, Water Temperature, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Water Temperature data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not...

  19. NOS CO-OPS Active Currents Data, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has surface Active Currents data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These raw data have not...

  20. NOS CO-OPS Meteorological Data, Relative Humidity, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Relative Humidity data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not...

  1. NOS CO-OPS Meteorological Data, Air Temperature, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Air Temperature data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not...

  2. NOS CO-OPS Meteorological Data, Conductivity, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Conductivity data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not been...

  3. NOS CO-OPS Water Level Data, Verified, High Low

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has verified (quality-controlled), daily, high low water level (tide) data from NOAA NOS Center for Operational Oceanographic Products and Services...

  4. NOS CO-OPS Meteorological Data, Wind, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Wind data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not been subjected...

  5. NOS CO-OPS Meteorological Data, Barometric Pressure, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Barometric Pressure data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not...

  6. NOS CO-OPS Meteorological Data, Rain Fall, 6-Minute

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset has Rain Fall data from NOAA NOS Center for Operational Oceanographic Products and Services (CO-OPS). WARNING: These preliminary data have not been...

  7. NOAA NOS SOS, EXPERIMENTAL, 1853-present, Barometric Pressure

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA NOS SOS server is part of the IOOS DIF SOS Project. The stations in this dataset have barometric pressure data. *These services are for testing and...

  8. Fatores adicionais de risco cardiovascular associados ao excesso de peso em crianças e adolescentes: o estudo do coração de Belo Horizonte Additional cardiovascular risk factors associated with excess weigth in children and adolescents: the Belo Horizonte heart study

    Directory of Open Access Journals (Sweden)

    Robespierre Q. C. Ribeiro

    2006-06-01

    Full Text Available OBJETIVO: Examinar a associação de sobrepeso e obesidade com perfis de atividade física, pressão arterial (PA e lípides séricos. MÉTODOS: Inquérito epidemiológico com 1.450 estudantes - seis a dezoito anos, em Belo Horizonte-MG. Dados: peso, altura, PA, espessura de pregas cutâneas, circunferência das cinturas, atividade física, colesterol total (CT, LDL-c, HDL-c, e hábitos alimentares. RESULTADOS:Prevalências de sobrepeso e obesidade foram 8,4% e 3,1%. Em relação aos estudantes situados no quartil inferior (Q1 da distribuição da prega subescapular, os estudantes do quartil superior (Q4 apresentaram um risco (odds ratio 3,7 vezes maior de ter um CT aumentado. Os estudantes com sobrepeso e obesos tiveram 3,6 vezes mais risco de apresentar PA sistólica aumentada, e 2,7 vezes para PA diastólica aumentada, em relação aos estudantes com peso normal. Os estudantes menos ativos, no Q1 da distribuição de MET, apresentaram 3,8 vezes mais riscos de terem CT aumentado comparados com os mais ativos (Q4. CONCLUSÃO: Estudantes com sobrepeso ou obesos ou nos quartis superiores para outras variáveis de adiposidade, assim como os estudantes com baixos níveis de atividade física ou sedentários apresentaram níveis mais elevados de PA e perfil lipídico de risco aumentado para o desenvolvimento de aterosclerose.OBJECTIVE: To examine the association of overweight and obesity with physical activity, blood pressure (BP and serum lipid profiles. METHODS: Epidemiologic investigation of 1,450 students, between the ages of 6 and 18, in the city of Belo Horizonte, MG. Data: weight, height, BP, skinfold thickness, waist circumference, physical activity, total cholesterol (TC, LDL-c, HDL-c, and dietary habits. RESULTS: The prevalence rates for overweight and obesity were 8.4% and 3.1%, respectively. In relation to the students in the lower quartile (Q1 of the distribution of subscapular skinfold, the students in the upper quartile (Q4 presented

  9. Prevalência e classificação das afecções podais em vacas lactantes na bacia leiteira de Belo Horizonte Prevalence and classification of foot problems in lactating dairy cows in Belo Horizonte, Brazil

    Directory of Open Access Journals (Sweden)

    L.R. Molina

    1999-04-01

    Full Text Available Com o objetivo de avaliar a prevalência e classificar clinicamente as afecções podais, foram examinadas 469 vacas em lactação de 10 fazendas da bacia leiteira de Belo Horizonte, criadas em regime de confinamento. Entre elas, 142 vacas, consideradas afetadas, apresentaram 534 lesões. A prevalência de vacas afetadas foi de 30,3%. Das afecções podais, 66,7% ocorreram nos membros posteriores e 33,3% nos membros anteriores. Ocorreram 49,2% lesões nas unhas laterais e 50,7% nas unhas mediais. Quanto ao escore de manqueira, 105 foram classificados como escore 1, 9 como escore 2, 15 como escore 3, 7 como escore 4 e 6 como escore 5. Maior incidência ocorreu nas vacas mais velhas, e não se observou influência da fase da lactação. A lesão mais freqüente foi a erosão de camada córnea, representando 48,5% do total, seguida por dermatite interdigital (13,5% e pododermatite séptica (9,6%. O elevado número de animais afetados permite concluir que as afecções podais em vacas em lactação confinadas constitui um sério problema em fazendas na bacia leiteira de Belo Horizonte.The prevalence and classification of clinical foot problems of 469 lactating dairy cows were studied in 10 farms in the dairy region of Belo Horizonte, Brazil, managed in confinement systems. A total of 142 cows were considered affected and presented 534 lesions. The prevalence of affected cows was 30.3%, being 66.7% in the hind feet and 33.3% in the fore feet, with no difference between outer claw (49.2% and inner claw (50.7%. The classification according to lameness showed, 105 animals classified as score 1, 9 as score 2, 15 as score 3, 7 as score 4 and 6 as score 5. Age of cow influenced the prevalence of lesions, but no effect of lactation stage was observed. The most frequent lesion was horn erosion representing 48.5% of the total, followed by interdigital dermatitis (13.5% and septic pododermatitis (9.6%.

  10. Anti-Inflammatory Effect of Recreational Exercise in TNBS-Induced Colitis in Rats: Role of NOS/HO/MPO System

    Directory of Open Access Journals (Sweden)

    Zita Szalai

    2014-01-01

    Full Text Available There are opposite views in the available literature: Whether physical exercise has a protective effect or not on the onset of inflammatory bowel disease (IBD. Therefore, we investigated the effects of recreational physical exercise before the induction of colitis. After 6 weeks of voluntary physical activity (running wheel, male Wistar rats were treated with TNBS (10 mg. 72 hrs after trinitrobenzene sulphonic acid (TNBS challenge we measured colonic gene (TNF-α, IL-1β, CXCL1 and IL-10 and protein (TNF-α expressions of various inflammatory mediators and enzyme activities of heme oxygenase (HO, nitric oxide synthase (NOS, and myeloperoxidase (MPO enzymes. Wheel running significantly increased the activities of HO, constitutive NOS (cNOS isoform. Furthermore, 6 weeks of running significantly decreased TNBS-induced inflammatory markers, including extent of lesions, severity of mucosal damage, and gene expression of IL-1β, CXCL1, and MPO activity, while IL-10 gene expression and cNOS activity were increased. iNOS activity decreased and the activity of HO enzyme increased, but not significantly, compared to the sedentary TNBS-treated group. In conclusion, recreational physical exercise can play an anti-inflammatory role by downregulating the gene expression of proinflammatory mediators, inducing anti-inflammatory mediators, and modulating the activities of HO and NOS enzymes in a rat model of colitis.

  11. Anestesia de suínos com azaperona, midazolam e propofol em associação ao tramadol ou não

    OpenAIRE

    Marqueti, Paulo Sérgio [UNESP

    2008-01-01

    Foram utilizados 20 suínos machos ou fêmeas, distribuídos aleatoriamente em dois grupos experimentais, grupo 1 (G1) e grupo 2 (G2). Empregouse como medicação pré-anestésica (MPA) azaperona 1,0 mg/kg e midazolam 0,2 mg/kg, administrados por via intramuscular, nos animais de ambos os grupos. Decorridos 15 minutos da aplicação da MPA, aos animais dos grupos 1 e 2, procedeuse a indução anestésica com propofol na dose de 4,0 mg/kg, via intravenosa, mantendo-se por infusão contínua, por via intrave...

  12. Diffusion of Ca and Mg in Calcite

    Energy Technology Data Exchange (ETDEWEB)

    Cygan, R.T.; Fisler, D.K.

    1999-02-10

    The self-diffusion of Ca and the tracer diffusion of Mg in calcite have been experimentally measured using isotopic tracers of {sup 25}Mg and {sup 44}Ca. Natural single crystals of calcite were coated with a thermally-sputtered oxide thin film and then annealed in a CO{sub 2} gas at one atmosphere total pressure and temperatures from 550 to 800 C. Diffusion coefficient values were derived from the depth profiles obtained by ion microprobe analysis. The resultant activation energies for Mg tracer diffusion and Ca self-diffusion are respectively: E{sub a}(Mg) = 284 {+-} 74 kJ/mol and E{sub a}(Ca) = 271 {+-} 80 kJ/mol. For the temperature ranges in these experiments, the diffusion of Mg is faster than Ca. The results are generally consistent in magnitude with divalent cation diffusion rates obtained in previous studies and provide a means of interpreting the thermal histories of carbonate minerals, the mechanism of dolomitization, and other diffusion-controlled processes. The results indicate that cation diffusion in calcite is relatively slow and cations are the rate-limiting diffusing species for the deformation of calcite and carbonate rocks. Application of the calcite-dolomite geothermometer to metamorphic assemblages will be constrained by cation diffusion and cooling rates. The direct measurement of Mg tracer diffusion in calcite indicates that dolomitization is unlikely to be accomplished by Mg diffusion in the solid state but by a recrystallization process.

  13. A TV COMUNITÁRIA NOS LIMITES DA FRAGILIZAÇÃO DA SOCIEDADE CIVIL

    Directory of Open Access Journals (Sweden)

    Sérgio Luiz Gadini

    2005-01-01

    Full Text Available A emergência de TVs comunitárias no Brasil, a partir de meados dos anos 1990, vem ao encontro de uma histórica demanda pela democratização da informação. Com base na legislação da TV a cabo brasileira (Lei 8.977/95, aprovada com o apoio do Fórum Nacional pela Democratização da Comunicação, movimentos, entidades sociais sem fins lucrativos, sindicatos, associações comunitárias e ONGs passaram a instituir associações de usuários dos canais comunitários de TV que surgiram em dezenas de cidades do Brasil. Num país marcado por grandes dificuldades de organização da sociedade civil, tal iniciativa representou, por muitos anos, uma alternativa que parecia indicar um outro horizonte de mobilização social por questões de interesse público (como é o caso das concessões e acesso à mídia. Mas, a eleição de um governo federal teoricamente identificado com demandas e problemas sociais forjados ao longo de séculos de exclusão (como ocorreu com a escolha do presidente Lula, eleito pelo PT acabou por indicar alguns limites nos projetos sociais envolvendo a luta pela democratização da comunicação. Tão logo o governo petista expressou sua política comunicacional, a fragilização da sociedade civil passou a expressar alguns dos limites e desafios para se pensar na execução de projetos de comunicação popular, o que também apresentou reflexos nos canais de TVs comunitárias de diversas regiões do País.

  14. Spatiotemporal alterations of cortical network activity by selective loss of NOS-expressing interneurons .

    Directory of Open Access Journals (Sweden)

    Dan eShlosberg

    2012-02-01

    Full Text Available Deciphering the role of GABAergic neurons in large neuronal networks such as the neocortex forms a particularly complex task as they comprise a highly diverse population. The neuronal isoform of the enzyme nitric oxide synthase (nNOS is expressed in the neocortex by specific subsets of GABAergic neurons. These neurons can be identified in live brain slices by the nitric oxide (NO fluorescent indicator DAF-2DA. However, this indicator was found to be highly toxic to the stained neurons. We used this feature to induce acute phototoxic damage to NO-producing neurons in cortical slices, and measured subsequent alterations in parameters of cellular and network activity.Neocortical slices were briefly incubated in DAF-2DA and then illuminated through the 4X objective. Histochemistry for NADPH diaphorase, a marker for nNOS activity, revealed elimination of staining in the illuminated areas following treatment. Whole cell recordings from several neuronal types before, during and after illumination confirmed the selective damage to non fast-spiking interneurons. Treated slices displayed mild disinhibition. The reversal potential of compound synaptic events on pyramidal neurons became more positive, and their decay time constant was elongated, substantiating the removal of an inhibitory conductance. The horizontal decay of local field potentials (LFPs was significantly reduced at distances of 300-400 m from the stimulation, but not when inhibition was non-selectively weakened with the GABAA blocker picrotoxin. Finally, whereas the depression of LFPs along short trains of 40 Hz stimuli was linearly reduced with distance or initial amplitude in control slices, this ordered relationship was disrupted in DAF-treated slices. These results reveal that NO-producing interneurons in the neocortex convey lateral inhibition to neighboring columns, and shape the spatiotemporal dynamics of the network's activity.

  15. Esomeprazole 40 mg provides more effective intragastric acid control than lansoprazole 30 mg, omeprazole 20 mg, pantoprazole 40 mg and rabeprazole 20 mg in patients with gastro-oesophageal reflux symptoms.

    Science.gov (United States)

    Röhss, Kerstin; Lind, Tore; Wilder-Smith, Clive

    2004-10-01

    To compare the effect of esomeprazole 40 mg with lansoprazole 30 mg, omeprazole 20 mg, pantoprazole 40 mg and rabeprazole 20 mg on intragastric pH during single and repeated dosing in four separate studies in patients with symptoms of gastro-oesophageal reflux disorder (GERD). In four randomised crossover studies, patients with symptoms of GERD received once-daily treatment with esomeprazole 40 mg or lansoprazole 30 mg (study A), omeprazole 20 mg (study B), pantoprazole 40 mg (study C) and rabeprazole 20 mg (study D) for 5 days. Continuous 24-h intragastric pH recording was performed on days 1 (except study B) and 5. Percentage of time over 24 h with intragastric pH greater than 4, 24-h median pH and the proportion of patients with pH greater than 4 for greater than or equal to 12 h and 16 h during the 24-h recording periods were investigated. In all four studies, esomeprazole 40 mg OD maintained intragastric pH greater than 4 for a significantly higher mean percentage of the 24-h period compared with all other proton pump inhibitors (PPIs) on days 1 (esomeprazole 40.6% versus lansoprazole 33.4%, P=0.0182; esomeprazole 50.3% versus pantoprazole 29.1%, Pomeprazole 43.7%, Pomeprazole 20 mg, pantoprazole 40 mg and rabeprazole 20 mg in patients with symptoms of GERD.

  16. Solvation of Mg in Helium-4: Are there Meta-stable Mg Dimers ?

    CERN Document Server

    Krotscheck, Eckhard

    2016-01-01

    Experiments on the formation of magnesium complexes in $^4$He nanodroplets were interpreted as the observation of the formation of weakly bound magnesium complexes. We present results for single Mg and Mg dimer solvation using the hypernetted chain / Euler-Lagrange method as well as path integral Monte Carlo simulations. We find that the phonon-mediated, indirect Mg-Mg interaction adds an oscillatory component to the direct Mg-Mg interaction. We undertake a step-by-step examination of the ingredients of the calculation of the phonon-induced interaction, comparing the results of semi-analytic HNC-EL calculations for bulk and single impurity results with experiments as well as Monte Carlo data. We do not find evidence for a sufficiently strong secondary minimum in the effective Mg-Mg interaction to support a metastable state.

  17. The role of MgO content in ex situ MgB2 wires

    DEFF Research Database (Denmark)

    Kovac, P.; Hugek, I.; Meligek, T.

    2004-01-01

    An experimental study of the effect of MgO content in the MgB2 powder used for ex situ made composite wires was carried out. Two single-core MgB2/Fe/Cu wires were made using commercial MgB2 powders from Alfa Aesar containing different fraction of MgO. Critical temperature and critical currents...... of as-deformed and heat-treated wires were measured. The differences between the wires are discussed and correlated with the MgO content. It was found that by increasing the amount of MgO, the inter-grain connectivity worsens, but well distributed and low size MgO particles improve flux pinning....

  18. Role of iNOS and eNOS expression in a group of Egyptian diabetic and nondiabetic nephropathy patients

    Directory of Open Access Journals (Sweden)

    Mayssa I. Aly

    2013-01-01

    Conclusion The presence of iNOS is associated with tubular damage resulting in renal failure. The upregulation of NO in diabetes mellitus type 2 may explain the endothelial dysfunction that is associated with almost all diabetic complications.

  19. Hydrogen Sorption Properties of the Intermetallic Mg2Ni Obtained by Using a Simoloyer Ball Milling

    Directory of Open Access Journals (Sweden)

    Bormann R.

    2010-07-01

    Full Text Available Intermetallic Mg2Ni was produced from elemental powder blends by mechanical alloying in a batch scale using a rotary horizontal mill (Simoloyer. Fast hydrogenation kinetics are obtained: 2.2 wt.% of hydrogen is absorbed within 10 minutes at 300 °C. Hydrogen sorption kinetics were further improved by adding Pd (1 mol% powder as a catalyst during ball milling. Crack formation and concomitant particle size reduction was observed by scanning electron microscopy after hydrogen cycling, which is attributed to internal stresses in the particles.

  20. Characterization of horizontal air–water two-phase flow

    Energy Technology Data Exchange (ETDEWEB)

    Kong, Ran; Kim, Seungjin, E-mail: skim@psu.edu

    2017-02-15

    Highlights: • A visualization study is performed to develop flow regime map in horizontal flow. • Database in horizontal bubbly flow is extended using a local conductivity probe. • Frictional pressure drop analysis is performed in horizontal bubbly flow. • Drift flux analysis is performed in horizontal bubbly flow. - Abstract: This paper presents experimental studies performed to characterize horizontal air–water two-phase flow in a round pipe with an inner diameter of 3.81 cm. A detailed flow visualization study is performed using a high-speed video camera in a wide range of two-phase flow conditions to verify previous flow regime maps. Two-phase flows are classified into bubbly, plug, slug, stratified, stratified-wavy, and annular flow regimes. While the transition boundaries identified in the present study compare well with the existing ones (Mandhane et al., 1974) in general, some discrepancies are observed for bubbly-to-plug/slug, and plug-to-slug transition boundaries. Based on the new transition boundaries, three additional test conditions are determined in horizontal bubbly flow to extend the database by Talley et al. (2015a). Various local two-phase flow parameters including void fraction, interfacial area concentration, bubble velocity, and bubble Sauter mean diameter are obtained. The effects of increasing gas flow rate on void fraction, bubble Sauter mean diameter, and bubble velocity are discussed. Bubbles begin to coalesce near the gas–liquid layer instead of in the highly packed region when gas flow rate increases. Using all the current experimental data, two-phase frictional pressure loss analysis is performed using the Lockhart–Martinelli method. It is found that the coefficient C = 24 yields the best agreement with the data with the minimum average difference. Moreover, drift flux analysis is performed to predict void-weighted area-averaged bubble velocity and area-averaged void fraction. Based on the current database, functional

  1. Horizontal gene transfer and genome evolution in Methanosarcina.

    Science.gov (United States)

    Garushyants, Sofya K; Kazanov, Marat D; Gelfand, Mikhail S

    2015-06-05

    Genomes of Methanosarcina spp. are among the largest archaeal genomes. One suggested reason for that is massive horizontal gene transfer (HGT) from bacteria. Genes of bacterial origin may be involved in the central metabolism and solute transport, in particular sugar synthesis, sulfur metabolism, phosphate metabolism, DNA repair, transport of small molecules etc. Horizontally transferred (HT) genes are considered to play the key role in the ability of Methanosarcina spp. to inhabit diverse environments. At the moment, genomes of three Methanosarcina spp. have been sequenced, and while these genomes vary in length and number of protein-coding genes, they all have been shown to accumulate HT genes. However, previous estimates had been made when fewer archaeal genomes were known. Moreover, several Methanosarcinaceae genomes from other genera have been sequenced recently. Here, we revise the census of genes of bacterial origin in Methanosarcinaceae. About 5% of Methanosarcina genes have been shown to be horizontally transferred from various bacterial groups to the last common ancestor either of Methanosarcinaceae, or Methanosarcina, or later in the evolution. Simulation of the composition of the NCBI protein non-redundant database for different years demonstrates that the estimates of the HGT rate have decreased drastically since 2002, the year of publication of the first Methanosarcina genome. The phylogenetic distribution of HT gene donors is non-uniform. Most HT genes were transferred from Firmicutes and Proteobacteria, while no HGT events from Actinobacteria to the common ancestor of Methanosarcinaceae were found. About 50% of HT genes are involved in metabolism. Horizontal transfer of transcription factors is not common, while 46% of horizontally transferred genes have demonstrated differential expression in a variety of conditions. HGT of complete operons is relatively infrequent and half of HT genes do not belong to operons. While genes of bacterial origin are

  2. Congo do Divino Espírito Santo, de Pinhões, MG: abertura de um Reinado por Mulheres

    Directory of Open Access Journals (Sweden)

    Sandra Helena Barroso

    2016-09-01

    Full Text Available Resumo da dissertação de mestrado:BARROSO, Sandra Helena. Congo do Divino Espírito Santo, de Pinhões, MG: abertura de um Reinado por Mulheres. 2016. Dissertação (Mestrado -  Programa de Pós-graduação em Ciências da Religião, Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte

  3. Mg/Ca of Continental Ostracode Shells

    Science.gov (United States)

    Ito, E.; Forester, R. M.; Marco-Barba, J.; Mezquita, F.

    2007-12-01

    Marine ionic chemistry is thought to remain constant. This, together with the belief that marine calcifiers partition Mg/Ca in a systematic manner as functions of temperature (and Mg/Ca) of water forms the basis of the Mg/Ca thermometer. In continental settings both of these assumptions are usually not true. Continental waters contain a wide variety of solutes in absolute and relative ion concentrations. Hence, waters with identical Mg/Ca may have very different concentrations of Mg and Ca and very different anions. Here we use two examples to focus on the effects of ion chemistry on Mg/Ca partitioning in continental ostracode shells and we ignore the complexities of solute evolution, which can change Mg/Ca over timescales of minutes to millennia. Palacios-Fest and Dettman (2001) conducted a monthly study of ,Cypridopsis vidua at El Yeso Lake in Sonora, Mexico. They established a relation between temperature and average shell Mg/Ca using regression analyses on averaged data. When their Mg/Ca-temperature relation is applied to monthly ,C. vidua data from Page Pond near Cleveland, Ohio, water temperatures of -8 to -1°C are obtained. The observed Mg/Ca ranges for El Yeso Lake (0.31 to 0.46) and Page Pond (0.33 to 0.46) are similar, as are their specific conductivities (700 to 850μS for El Yeso Lake; 400 to 600μS for Page Pond). However, [Ca] is 140-260 mg/L for El Yeso, but only 70-90 mg/L for Page Pond. Page Pond data, in fact, shows a good temperature shell Mg/Ca relation for .C. vidua, but the relation is different from that at El Yeso. Hence, shell Mg/Ca is a multi-valued, family of curves function of temperature and Mg/Ca of water that depends on the [Mg] and [Ca] values in water and perhaps other factors. Our second example comes from sites near Valencia, Spain and involves shell data for ,Cyprideis torosa, an estuarine ostracode that is tolerant of a wide range of salinity and can live in continental waters as long as the carbonate alkalinity to Ca ratio is

  4. Advanced high performance horizontal piezoelectric hybrid synthetic jet actuator

    Science.gov (United States)

    Xu, Tian-Bing (Inventor); Jiang, Xiaoning (Inventor); Su, Ji (Inventor)

    2012-01-01

    The present invention comprises a high performance, horizontal, zero-net mass-flux, synthetic jet actuator for active control of viscous, separated flow on subsonic and supersonic vehicles. The present invention is a horizontal piezoelectric hybrid zero-net mass-flux actuator, in which all the walls of the chamber are electrically controlled synergistically to reduce or enlarge the volume of the synthetic jet actuator chamber in three dimensions simultaneously and to reduce or enlarge the diameter of orifice of the synthetic jet actuator simultaneously with the reduction or enlargement of the volume of the chamber. The present invention is capable of installation in the wing surface as well as embedding in the wetted surfaces of a supersonic inlet. The jet velocity and mass flow rate for the SJA-H will be several times higher than conventional piezoelectric actuators.

  5. Composite Coiled Tubing for Extended Reach in Horizontal Oil Wells

    DEFF Research Database (Denmark)

    Costache, Andrei; Berggreen, Christian

    2017-01-01

    Conventional steel coiled tubing cannot reach along the entire length of very long horizontal oil wells. A lighter and more buoyant coiled tube is made possible using composite materials. The high stiffness to weight ratio of fiber reinforced polymers, coupled with a lower coefficient of friction......, has the potential of greatly extending the reach in horizontal oil wells. This study shows how to design composite coiled tubing and gives a comprehensive discussion about the most influential parameters. Several solutions, using glass-fiber and carbon are considered. Finite element models are used...... to calculate the buckling loads and the corresponding interlaminar stresses. The very positive results obtained during this study show that composite coiled tubing systems are vastly superior to their steel counterparts, and that in the future, these will become the new industry standard....

  6. On the horizontal counter current model for multi fluid flow

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Yong; Park, Chan Eok; Sohn, Jong Joo [KEPCO E and C Company, Daejeon (Korea, Republic of); Ransom, V. H. [Purdue Univ., Lafayette (United States)

    2012-10-15

    Through the time/volume averaging technique, one can get the interfacial forces caused by the volume fraction gradients in the horizontal channel or horizontal counter current model (HCC). But, in reality, there are still very diverse differences in modeling the term and in applying the term in the computer programs. Table I shows five different results for the estimation of the period for the circular cavity filled with saturated water of 10Mpa, in which the vapor volume fraction is linearly perturbed with {proportional_to}=0.06(x/...0.5) from base value of 0.5 along the length x, as depicted in the Fig.1. The length (L) and the diameter (H) of the cavity are 10m and 0.5m respectively. It was found that the virtual mass coefficients, different models and mistakes in the documents are three main sources of the differences.

  7. Design and Analysis of Horizontal Axial Flow Motor Shroud

    Science.gov (United States)

    Wang, Shiming; Shen, Yu

    2018-01-01

    The wind turbine diffuser can increase the wind energy utilization coefficient of the wind turbine, and the addition of the shroud to the horizontal axis wind turbine also plays a role of accelerating the flow of the condensate. First, the structure of the shroud was designed and then modeled in gambit. The fluent software was used to establish the mathematical model for simulation. The length of the shroud and the opening angle of the shroud are analyzed to determine the best shape of the shroud. Then compared the efficiency with or without the shroud, through the simulation and the experiment of the water tank, it is confirmed that the horizontal axis of the shroud can improve the hydrodynamic performance.

  8. HORIZONTAL AND VERTICAL INTRA-INDUSTRY TRADE OF TURKEY

    Directory of Open Access Journals (Sweden)

    NEVZAT ŞİMŞEK

    2013-06-01

    Full Text Available Crucial improvement have taken place in intra-industry trade literature since intra-industry trade phenomenon was empirically determined. Nowadays economists discuss on the necessity of distinguishing between horizontal and vertical intra-industry trade especially relating to product differentiation in each industry. As standard Grubel-Lloyd index does not determine the time when two way trade is taken into consideration, in this paper first of all Two-Way Trade index is used and then horizontal intra-industry trade and low-high quality vertical intra-industry trade are distinguished from each other regarding unit value differential. As a result of the analysis the findings show that low quality vertical intra-industry trade dominate in Turkey's intra-industry trade.

  9. The horizontal stability of an FLNG with different turret locations

    Directory of Open Access Journals (Sweden)

    Zhi-Tian Xie

    2015-03-01

    Full Text Available The horizontal stability of a Single-Point Moored (SPM Floating Liquefied Natural Gas (FLNG facility is investigated. Both numerical and experimental studies have been conducted for this SPM FLNG. The numerical simulations feature well the experimental data. The effects of the turret locations are studied based on the validated numerical model. Statistic results of the vessel’s motions with different turret locations are conducted and compared. The results show that the longitudinal location of the turret has a significant influence on the horizontal stability, which has a strong relationship with the yaw and roll motions. The calculated top tensions on the hawsers also develop a regular change as changing the turret’s location. The investigation will provide a brief of principles with more details for the design of the ongoing project.

  10. On the relation between zenith sky brightness and horizontal illuminance

    Science.gov (United States)

    Kocifaj, M.; Posch, Th.; Solano Lamphar, H. A.

    2015-01-01

    The effects of artificial light at night are an emergent research topic for astronomers, physicists, engineers and biologists around the world. This leads to a need for measurements of the night sky brightness (= diffuse luminance of the night sky) and nocturnal illuminance. Currently, the most sensitive light meters measure the zenith sky brightness in magV/arcsec2 or - less frequently - in cd m-2. However, the horizontal illuminance resulting only from the night sky is an important source of information that is difficult to obtain with common instruments. Here we present a set of approximations to convert the zenith luminance into horizontal illuminance. Three different approximations are presented for three idealized atmospheric conditions: homogeneous sky brightness, an isotropically scattering atmosphere and a turbid atmosphere. We also apply the resulting conversion formulae to experimental data on night sky luminance, obtained during the past three years.

  11. Horizontal high speed stacking for batteries with prismatic cans

    Energy Technology Data Exchange (ETDEWEB)

    Bartos, Andrew L.; Lin, Yhu-Tin; Turner, III, Raymond D.

    2016-06-14

    A system and method for stacking battery cells or related assembled components. Generally planar, rectangular (prismatic-shaped) battery cells are moved from an as-received generally vertical stacking orientation to a generally horizontal stacking orientation without the need for robotic pick-and-place equipment. The system includes numerous conveyor belts that work in cooperation with one another to deliver, rotate and stack the cells or their affiliated assemblies. The belts are outfitted with components to facilitate the cell transport and rotation. The coordinated movement between the belts and the components promote the orderly transport and rotation of the cells from a substantially vertical stacking orientation into a substantially horizontal stacking orientation. The approach of the present invention helps keep the stacked assemblies stable so that subsequent assembly steps--such as compressing the cells or attaching electrical leads or thermal management components--may proceed with a reduced chance of error.

  12. Horizontal Stratification in Access to Danish University Programmes

    DEFF Research Database (Denmark)

    Munk, Martin D.; Thomsen, Jens Peter

    2017-01-01

    In this paper, we use register data to examine horizontal stratification within university institutions and university fields of study in Denmark, a country that has experienced a reduction of the social class gap in access to higher education. First, we argue that it is important to use...... in different fields of study and university institutions. Most importantly, we find distinct patterns of horizontal stratification by field of study and parental occupation that would have remained hidden had we used more aggregated classifications for field of study and social origin....... a relatively detailed classification of parents’ occupations to determine how students are endowed with different forms of capital, even when their parents would typically be characterised as belonging to the same social group. Second, we distinguish among disciplines and among university institutions...

  13. Daylighting provided by horizontal openings using the illumination vector

    Energy Technology Data Exchange (ETDEWEB)

    Navarro, J.; Sendra, J.J. [Instituto Universitario de Ciencias de la Construccion, Universidad de Sevilla (Spain)

    2006-12-15

    Stemming from the expressions of the illumination vector provided by vertical openings at any point of the interior space, this article proposes and solves the equivalent expressions for openings in horizontal planes, thus completing the expressions of Navarro [Sobre iluminacion natural en arquitectura. Ed. Secretariado de Publicaciones de la Universidad de Sevilla; 1983] and offering algorithms which give the value of the illumination vector for CIE skies [Natural daylight official recommendations. Paris: CIE COMMITE 3.2.; 1955] at any point of the interior space and for any size of window whether vertical or horizontal. This constitutes a highly potential tool of computerized calculation of the direct component of natural illumination which is eminently more flexible and precise than those systems which are based on finite elements. (author)

  14. Influence of Mg Content on Deformability of AlMg Alloys during Extrusion

    Directory of Open Access Journals (Sweden)

    Leśniak D.

    2016-03-01

    Full Text Available In this study the research on deformability of AlMg alloys with high Mg contents in extrusion was carried out. The different shapes from AlMg alloys containing 3.5%, 4.5% and 5.5% of Mg were extruded on 500 T semi-industrial press by using one-hole and multi-hole flat dies. The extrudates surface quality was under investigations in relation with the temperature-speed parameters of the extrusion process. The metal exit speed was estimated depending on the extrudates shape, wall thickness and Mg content. The alloy’s border solidus and liquidus temperatures were also determined.

  15. Experimental and theoretical study of horizontal-axis wind turbines

    OpenAIRE

    Anderson, Michael Broughton

    1981-01-01

    An experimental and theoretical study of horizontal-axis wind turbines is undertaken. The theoretical analyses cover the four major areas of aerodynamics, turbulence. aeroelasticity and blade optimisation. EXisting aerodynamic theories based on blade-element theory for predicting the loads on a wind turbine blade are reviewed and extended to include non-uniform flow, tip losses and the 'turbulent wake' state. A theoretical model based on a free vortex representation of a ...

  16. Cheating the Acetabular Component Horizontally in Total Hip Arthroplasty.

    Science.gov (United States)

    Eskildsen, Scott M; Moskal, Peter T; Olcott, Christopher W; Del Gaizo, Daniel J

    2016-11-01

    To avoid inadvertent vertical positioning of the acetabular component during total hip arthroplasty (THA), the authors routinely "cheat" component abduction an additional 10° horizontal (goal=30°). This likely increases the incidence of components placed into abduction of less than 30°, the clinical consequences of which are not well studied. The purpose of this study was to determine the clinical and radiographic outcomes in patients undergoing THA with acetabular components positioned in less than 30° of abduction as compared with those with components positioned between 30° and 50°. A retrospective review was performed of consecutive patients undergoing primary THA with horizontally cheated acetabular component position performed by a single surgeon. Patients were grouped into cohorts with either component abduction less than 30° or between 30° and 50°. Demographic data, operative data, and complications were recorded. Harris Hip Scores (HHS) and radiographic analysis were obtained from preoperative and most recent clinic visits. Between September 2004 and September 2010, 320 consecutive THA procedures were performed. A total of 149 hips had component abduction less than 30° (mean, 25.8°; range, 15.7°-29.4°). No components had greater than 50° of abduction. At an average 37-month follow-up, no significant difference in HHS was found between the 2 cohorts (P=.137). The horizontal cohort had no dislocations, component loosening, or osteolysis. By cheating the acetabular component more horizontal, an excessively vertical position was avoided. Component abduction less than 30° yielded equivalent clinical outcomes to component abduction between 30° and 50°. [Orthopedics. 2016; 39(6):e1092-e1096.]. Copyright 2016, SLACK Incorporated.

  17. Two phase flow instabilities in horizontal straight tube evaporator

    OpenAIRE

    2010-01-01

    Abstract It is essential to ensure the stability of a refrigeration system if the oscillation in evaporation process is the primary cause for the whole system instability. This paper is concerned with an experimental investigation of two phase flow instabilities in a horizontal straight tube evaporator of a refrigeration system. The relationship between pressure drop and mass flow with constant heat flux and evaporation pressure is measured and determined. It is found that there is...

  18. The structuring of markets for infomediation: horizontal versus vertical dynamics

    OpenAIRE

    Kevin Mellet

    2007-01-01

    Two factors play a decisive role in the structuring of Internet based markets for infomediation (informational intermediation) : network externalities and information processing. First, these are examined separately. The two-sided markets literature focuses on the impact of network externalities in a context of competition among 2-sided platforms. It explains the level of concentrationfragmentation of those markets, and explores its welfare implications. We shall call this model the "horizont...

  19. Dynamic thermal modelling of horizontal ground-source heat pumps

    OpenAIRE

    Guohui Gan

    2013-01-01

    A computer program has been developed for numerical simulation of the dynamic thermal performance of horizontally coupled heat exchangers for ground-source heat pumps, taking account of dynamic variations of climatic, load and soil conditions. The program was used to investigate the effects of operating and start times, installation depth and soil freezing on the heat exchanger performance. It is shown that the rate of heat extraction decreases with increasing operating time. Operating a heat...

  20. Volume fracturing of deep shale gas horizontal wells

    Directory of Open Access Journals (Sweden)

    Tingxue Jiang

    2017-03-01

    Full Text Available Deep shale gas reservoirs buried underground with depth being more than 3500 m are characterized by high in-situ stress, large horizontal stress difference, complex distribution of bedding and natural cracks, and strong rock plasticity. Thus, during hydraulic fracturing, these reservoirs often reveal difficult fracture extension, low fracture complexity, low stimulated reservoir volume (SRV, low conductivity and fast decline, which hinder greatly the economic and effective development of deep shale gas. In this paper, a specific and feasible technique of volume fracturing of deep shale gas horizontal wells is presented. In addition to planar perforation, multi-scale fracturing, full-scale fracture filling, and control over extension of high-angle natural fractures, some supporting techniques are proposed, including multi-stage alternate injection (of acid fluid, slick water and gel and the mixed- and small-grained proppant to be injected with variable viscosity and displacement. These techniques help to increase the effective stimulated reservoir volume (ESRV for deep gas production. Some of the techniques have been successfully used in the fracturing of deep shale gas horizontal wells in Yongchuan, Weiyuan and southern Jiaoshiba blocks in the Sichuan Basin. As a result, Wells YY1HF and WY1HF yielded initially 14.1 × 104 m3/d and 17.5 × 104 m3/d after fracturing. The volume fracturing of deep shale gas horizontal well is meaningful in achieving the productivity of 50 × 108 m3 gas from the interval of 3500–4000 m in Phase II development of Fuling and also in commercial production of huge shale gas resources at a vertical depth of less than 6000 m.

  1. HTGR core model response to simultaneous horizontal and vertical excitations

    Energy Technology Data Exchange (ETDEWEB)

    Bezler, P.; Curreri, J.R.

    1978-01-01

    An experimental program was undertaken to investigate the effects of simultaneous horizontal and vertical excitation on the response of the HTGR core. The tests were conducted with block array models of the core excited with both fixed frequency and sweeping frequency harmonic forcing functions. The effects on both free standing block arrays and on block arrays preloaded in the vertical direction were investigated. The results of the tests as well as their importance as regards to the full core response, are presented.

  2. A Stratified Flow Fine Structure near a Horizontally Moving Strip

    Science.gov (United States)

    Bardakov, Roman N.; Chashechkin, Yuli D.

    Flow field pattern produced by a strip of arbitrary width moving with constant velocity along a horizontal plane in exponentially stratified fluid is calculated analytically in linear approximation. Constructed solution describes upstream transient and attached waves, and a boundary layer. Numerically visualized flow pattern is consistent with Schlieren observations. Drag on the strip is calculated and compared with well-known results following from conventional boundary layer theory. Due to action of edges singularities an inducing torque lift force is formed.

  3. Spatial Competition with Entry Deterrence considering Horizontal Product Differentiations

    Directory of Open Access Journals (Sweden)

    Ai-nong Zhou

    2013-01-01

    Full Text Available Spatial competition plays important roles in economics, which attracts extensive research. This paper addresses spatial competitions along with horizontal product differentiations and entry deterrence. By the dynamic game theory model about one firm and a potential entrant with different cost in a linear city, this paper finds that both the higher fixed setup cost and the higher transportation cost deter entrants. To efficiently deter the entrants, the establisher is inclined to locating at the middle point of the linear city.

  4. Modelling studies of horizontal steam generator PGV-1000 with Cathare

    Energy Technology Data Exchange (ETDEWEB)

    Karppinen, I. [VTT Energy, Espoo (Finland)

    1995-12-31

    To perform thermal-hydraulic studies applied to nuclear power plants equipped with VVER, a program of qualification and assessment of the CATHARE computer code is in progress at the Institute of Protection and Nuclear Safety (IPSN). In this paper studies of modelling horizontal steam generator of VVER-1000 with the CATHARE computer code are presented. Steady state results are compared with measured data from the fifth unit of Novovoronezh nuclear power plant. (orig.). 10 refs.

  5. Comparison of vertical and horizontal systems of constructed wetlands

    OpenAIRE

    Vidmar, Urša

    2011-01-01

    The constructed wetlands (CW) or artificial wetlands with the wastewater treatment as their primary function are complex systems of water, substrate, plants, animals and microorganisms (bacteria). In practice there are two general systems in use, the system with the surface and the system with the subsurface flow, which is further divided into the system with the horizontal water flow and in the system with the vertical water flow. Understanding of constructed wetlands function...

  6. The medial pterygoid muscle: a stabiliser of horizontal jaw movement.

    Science.gov (United States)

    Chen, H; Whittle, T; Gal, J A; Murray, G M; Klineberg, I J

    2017-10-01

    There is limited information of the normal function of the human medial pterygoid muscle (MPt). The aims were to determine whether (i) the MPt is active throughout horizontal jaw movements with the teeth apart and (ii) whether single motor units (SMUs) are active during horizontal and opening-closing jaw movements. Intramuscular electrodes were placed in the right MPt of 18 participants who performed five teeth-apart tasks: (i) postural position, (ii) ipsilateral (i.e. right) jaw movement, (iii) contralateral movement, (iv) protrusive movement and (v) opening-closing movement. Movement tasks were guided by a target and were divided into BEFORE, OUT, HOLDING, RETURN and AFTER phases according to the movement trajectories recorded by a jaw tracking system. Increased EMG activity was consistently found in the OUT, HOLDING and RETURN phases of the contralateral and protrusive movement tasks. An increased RETURN phase activity in the ipsilateral task indicates an important role for the MPt in the contralateral force vector. Of the 14 SMUs active in the opening-closing task, 64% were also active in at least one horizontal task. There were tonically active SMUs at the postural jaw position in 44% of participants. These new data point to an important role for the MPt in the fine control of low forces as required for stabilisation of vertical mandibular position not only to maintain postural position, but also throughout horizontal jaw movements with the teeth apart. These findings provide baseline information for future investigations of the possible role of this muscle in oro-facial pain conditions. © 2017 John Wiley & Sons Ltd.

  7. A novel dataset on horizontal property rights in 126 jurisdictions

    OpenAIRE

    Dari-Mattiacci, Giuseppe; Guerriero, Carmine

    2017-01-01

    The law and the economy are deeply influenced by horizontal property rights, which are the rules regulating legal direct and indirect takings between private parties. To foster research on the determinants and impact of these institutions, we illustrate here a novel data set partially employed in (Dari-Mattiacci, Giuseppe, Carmine Guerriero, 2015; Dari-Mattiacci, Giuseppe, Carmine Guerriero, Zhenxing Huang, 2016) [3], [4], and (Guerriero Carmine, 2016) [6] and describing the acquisition of ow...

  8. Simulasi Sensor Seismometer Horizontal Menggunakan MEMS Accelerometer Berbasis Arduino UNO

    OpenAIRE

    Hutapea, Cynthya Dorothy

    2017-01-01

    130801045 Telah dirancang sebuah alat sebagai seismometer horizontal menggunakan GY-521 dan Arduino UNO ATMEGA 328P. Alat ini terdiri dari GY-521 modul MPU-6050 sebagai sensor vibrasi dan arduino UNO sebagai pengendali sistem. Perangkat lunak yang digunakan sebagai pengendali sistem adalah Arduino IDE. Cara kerja alat tersebut cukup sederhana yaitu accelerometer MPU-6050 mengukur amplitudo dan frekuensi dari kecepatan suatu getaran dan kemudian datanya akan dikirim ke arduino. Arduino UNO ...

  9. Horizontal integration in the development strategy of mining companies

    Directory of Open Access Journals (Sweden)

    Jan Kudełko

    2016-01-01

    Full Text Available Integration strategy is one option in the development of mining companies and is implemented through a connection of either processes or economic entities which operate or may operate separately. Usually this strategy is carried out by companies that occupy a very strong competitive position. Considering its direction, it may be horizontal or vertical. Horizontal integration strategy stems from a desire to increase market share by an entrepreneur or create a new company based on common know-how and combined operational processes. It can be realized in an external dimension through a merger or takeover, as well as in the internal dimension based on its own resources. The external dimension is based on capital or contractual integration of a company with external economic entities performing related or conglomerate activity. The targets of such integration have a resource, a market effectiveness, or a competence nature. In the case of mining companies, it covers all important activity areas, including geology, mining, processing, environmental protection, and waste management, and is carried out with due diligence. In the internal dimension, the strategy of horizontal integration consists in consolidating the strategic targets of all business units around the company’s (corporation’s targets. The authors focused on two trends most relevant to pursuing a horizontal integration strategy, including increasing the company’s flexibility and undertaking joint activities. Flexibility consists in the potential ability of the company to adapt quickly to changed environment conditions. Joint activity includes co-operation of its respective units in terms of products, markets, and functions.

  10. Modeling of inelastic deformation around vertical and horizontal wells

    Science.gov (United States)

    Stefanov, Yu. P.; Myasnikov, A. V.

    2015-10-01

    The paper presents numerical modeling results on plastic deformation development around vertical and horizontal wells in rocks for four lithologies typical of the Bazhenov formation. Estimates of irreversible deformation were obtained depending on wellbore pressure, in-situ stress distribution and rock dilation factor. Computational results showed that for the considered lithology borehole pressure management does not always provide wellbore stability if the contrast between principal stresses is large enough.

  11. Leachate treatment and greenhouse gas emission in subsurface horizontal flow constructed wetland.

    Science.gov (United States)

    Chiemchaisri, C; Chiemchaisri, W; Junsod, J; Threedeach, S; Wicranarachchi, P N

    2009-08-01

    Organic and nitrogen removal efficiencies in subsurface horizontal flow wetland system (HSF) with cattail (Typha augustifolia) treating young and partially stabilized solid waste leachate were investigated. Hydraulic loading rate (HLR) in the system was varied at 0.01, 0.028 and 0.056 m(3)/m(2) d which is equivalent to hydraulic retention time (HRT) of 28, 10 and 5 d. Average BOD removals in the system were 98% and 71% when applied to young and partially stabilized leachate at HLR of 0.01 m(3)/m(2) d. In term of total kjeldahl nitrogen, average removal efficiencies were 43% and 46%. High nitrogen in the stabilized leachate adversely affected the treatment performance and vegetation in the system. Nitrogen transforming bacteria were found varied along the treatment pathway. Methane emission rate was found to be highest at the inlet zone during young leachate treatment at 79-712 mg/m(2) d whereas CO2 emission ranged from 26-3266 mg/m(2) d. The emission of N2O was not detected.

  12. Measuring one nucleon transfer reaction 24Mg( p, d)23Mg for astrophysical reaction rates

    Science.gov (United States)

    Lee, E. J.; Chae, K. Y.

    2017-12-01

    The level structure of a radionuclide 23Mg has been studied by using the 24Mg( p, d)23Mg one nucleon transfer reaction measurement for the astrophysical 19Ne(α, γ)23Mg reaction rate. A 41 MeV proton beam was produced and accelerated at the 25 MV tandem accelerator of the Holifield Radioactive Ion Beam Facility of the Oak Ridge National Laboratory in the United States. The beam particles impinged on an isotopically-enriched 24Mg solid target. Angular distributions of recoiling deuterons were extracted by using a large area silicon strip detector array. By comparing the experimentally-obtained angular distributions with zero range distorted wave Born approximation calculations, spins and parities of three energy levels of 23Mg could be constrained for the first time, which is very important information needed to understand the 19Ne(α, γ)23Mg reaction rate.

  13. Dissimilar ultrasonic spot welding of Mg-Al and Mg-high strength low alloy steel

    Directory of Open Access Journals (Sweden)

    V.K. Patel

    2014-01-01

    Full Text Available Sound dissimilar lap joints were achieved via ultrasonic spot welding (USW, which is a solid-state joining technique. The addition of Sn interlayer during USW effectively blocked the formation of brittle al12Mg17 intermetallic compound in the Mg-Al dissimilar joints without interlayer, and led to the presence of a distinctive composite-like Sn and Mg2Sn eutectic structure in both Mg-Al and Mg-high strength low alloy (HSLA steel joints. The lap shear strength of both types of dissimilar joints with a Sn interlayer was significantly higher than that of the corresponding dissimilar joints without interlayer. Failure during the tensile lap shear tests occurred mainly in the mode of cohesive failure in the Mg-Al dissimilar joints and in the mode of partial cohesive failure and partial nugget pull-out in the Mg-HSLA steel dissimilar joints.

  14. Overcoming horizontal depolarizing resonances with multiple tune jumps

    Directory of Open Access Journals (Sweden)

    H. Huang

    2014-08-01

    Full Text Available In a medium energy proton synchrotron, strong enough partial Siberian snakes can be used to avoid both imperfection and vertical intrinsic depolarizing resonances. However, partial snakes tilt the stable spin direction away from vertical, which generates depolarizing resonances associated with horizontal tune. The relatively weak but numerous horizontal intrinsic resonances are the main source of the residual polarization losses. A pair of horizontal tune jump quads have been used in the Brookhaven Alternating Gradient Synchrotron to overcome these weak resonances. The locations of the two quads have to be chosen such that the disturbance to the beam optics is minimum. The emittance growth has to be mitigated for this method to work. In addition, this technique needs very accurate jump timing. Using two partial Siberian snakes, with vertical tune inside the spin tune gap and 80% polarization at the Alternating Gradient Synchrotron injection, polarized proton beam had reached 1.5×10^{11} proton per bunch with 65% polarization. With the tune jump timing optimized and emittance preserved, more than 70% polarization with 2×10^{11} protons per bunch has been achieved. The polarization transport efficiency is close to 90%.

  15. Comparing reading speed for horizontal and vertical English text.

    Science.gov (United States)

    Yu, Deyue; Park, Heejung; Gerold, David; Legge, Gordon E

    2010-02-23

    There are three formats for arranging English text for vertical reading-upright letters arranged vertically (marquee), and horizontal text rotated 90 degrees clockwise or counterclockwise. Previous research has shown that reading is slower for all three vertical formats than for horizontal text, with marquee being slowest (M. D. Byrne, 2002). It has been proposed that the size of the visual span-the number of letters recognized with high accuracy without moving the eyes-is a visual factor limiting reading speed. We predicted that reduced visual-span size would be correlated with the slower reading for the three vertical formats. We tested this prediction with uppercase and lowercase letters. Reading performance was measured using two presentation methods: RSVP (Rapid Serial Visual Presentation) and flashcard (a block of text on four lines). On average, reading speed for horizontal text was 139% faster than marquee text and 81% faster than the rotated texts. Size of the visual span was highly correlated with changes in reading speed for both lowercase and uppercase letters and for both RSVP and flashcard reading. Our results are consistent with the view that slower reading of vertical text is due to a decrease in the size of the visual span for vertical reading.

  16. Investigation of AC losses in horizontally parallel HTS tapes

    Science.gov (United States)

    Shen, Boyang; Li, Jing; Geng, Jianzhao; Fu, Lin; Zhang, Xiuchang; Zhang, Heng; Li, Chao; Grilli, Francesco; Coombs, T. A.

    2017-07-01

    This paper presents an AC loss study of horizontally parallel HTS tapes. We proposed to use three parallel HTS tapes as an example. The AC losses of the middle and end tape of three parallel tapes have been measured using the electrical method and compared to those of an individual tape. The effect of the interaction between tapes on AC losses has been analysed, and compared with finite-element method (FEM) simulations using the 2D H -formulation implemented in COMSOL Multiphysics. By using FEM simulations, the cases of increasing number of parallel tapes have been considered, and the normalised ratio between the total average AC losses per tape and the AC losses of an individual single tape has been calculated for different gap distances. We proposed a new parameter, Ns , a turning point for number of tapes, to divide Stage 1 and Stage 2 for the AC loss study of horizontally parallel tapes. For Stage 1, N Ns , the total average losses per tape decrease with the increasing number of tapes. The analysis demonstrates that horizontally parallel HTS tapes could be potentially used in superconducting devices like HTS transformers, which could retain or even reduce the total average AC losses per tape with large number of parallel tapes.

  17. The chromosomal organization of horizontal gene transfer in bacteria.

    Science.gov (United States)

    Oliveira, Pedro H; Touchon, Marie; Cury, Jean; Rocha, Eduardo P C

    2017-10-10

    Bacterial adaptation is accelerated by the acquisition of novel traits through horizontal gene transfer, but the integration of these genes affects genome organization. We found that transferred genes are concentrated in only ~1% of the chromosomal regions (hotspots) in 80 bacterial species. This concentration increases with genome size and with the rate of transfer. Hotspots diversify by rapid gene turnover; their chromosomal distribution depends on local contexts (neighboring core genes), and content in mobile genetic elements. Hotspots concentrate most changes in gene repertoires, reduce the trade-off between genome diversification and organization, and should be treasure troves of strain-specific adaptive genes. Most mobile genetic elements and antibiotic resistance genes are in hotspots, but many hotspots lack recognizable mobile genetic elements and exhibit frequent homologous recombination at flanking core genes. Overrepresentation of hotspots with fewer mobile genetic elements in naturally transformable bacteria suggests that homologous recombination and horizontal gene transfer are tightly linked in genome evolution.Horizontal gene transfer (HGT) is an important mechanism for genome evolution and adaptation in bacteria. Here, Oliveira and colleagues find HGT hotspots comprising  ~ 1% of the chromosomal regions in 80 bacterial species.

  18. Staphylococci on ICE: Overlooked agents of horizontal gene transfer.

    Science.gov (United States)

    Sansevere, Emily A; Robinson, D Ashley

    2017-01-01

    Horizontal gene transfer plays a significant role in spreading antimicrobial resistance and virulence genes throughout the genus Staphylococcus , which includes species of clinical relevance to humans and animals. While phages and plasmids are the most well-studied agents of horizontal gene transfer in staphylococci, the contribution of integrative conjugative elements (ICEs) has been mostly overlooked. Experimental work demonstrating the activity of ICEs in staphylococci remained frozen for years after initial work in the 1980s that showed Tn 916 was capable of transfer from Enterococcus to Staphylococcus . However, recent work has begun to thaw this field. To date, 2 families of ICEs have been identified among staphylococci - Tn 916 that includes the Tn 5801 subfamily, and ICE 6013 that includes at least 7 subfamilies. Both Tn 5801 and ICE 6013 commonly occur in clinical strains of S. aureus . Tn 5801 is the most studied of the Tn 916 family elements in staphylococci and encodes tetracycline resistance and a protein that, when expressed in Escherichia coli , inhibits restriction barriers to incoming DNA. ICE 6013 is among the shortest known ICEs, but it still includes many uncharacterized open reading frames. This element uses an IS 30 -like transposase as its recombinase, providing some versatility in integration sites. ICE 6013 also conjugatively transfers among receptive S. aureus strains at relatively higher frequency than Tn 5801 . Continued study of these mobile genetic elements may reveal the full extent to which ICEs impact horizontal gene transfer and the evolution of staphylococci.

  19. Horizontal transfer of carbohydrate metabolism genes into ectomycorrhizal Amanita.

    Science.gov (United States)

    Chaib De Mares, Maryam; Hess, Jaqueline; Floudas, Dimitrios; Lipzen, Anna; Choi, Cindy; Kennedy, Megan; Grigoriev, Igor V; Pringle, Anne

    2015-03-01

    The genus Amanita encompasses both symbiotic, ectomycorrhizal fungi and asymbiotic litter decomposers; all species are derived from asymbiotic ancestors. Symbiotic species are no longer able to degrade plant cell walls. The carbohydrate esterases family 1 (CE1s) is a diverse group of enzymes involved in carbon metabolism, including decomposition and carbon storage. CE1 genes of the ectomycorrhizal A. muscaria appear diverged from all other fungal homologues, and more similar to CE1s of bacteria, suggesting a horizontal gene transfer (HGT) event. In order to test whether AmanitaCE1s were acquired horizontally, we built a phylogeny of CE1s collected from across the tree of life, and describe the evolution of CE1 genes among Amanita and relevant lineages of bacteria. CE1s of symbiotic Amanita were very different from CE1s of asymbiotic Amanita, and are more similar to bacterial CE1s. The protein structure of one CE1 gene of A. muscaria matched a depolymerase that degrades the carbon storage molecule poly((R)-3-hydroxybutyrate) (PHB). Asymbiotic Amanita do not carry sequence or structural homologues of these genes. The CE1s acquired through HGT may enable novel metabolisms, or play roles in signaling or defense. This is the first evidence for the horizontal transfer of carbohydrate metabolism genes into ectomycorrhizal fungi. © 2014 The Authors New Phytologist © 2014 New Phytologist Trust.

  20. Interpretation of magnetic anomalies using the horizontal gradient analytic signal

    Directory of Open Access Journals (Sweden)

    H. A. Bake

    2001-06-01

    Full Text Available In recent years the analytic signal method has been of great utility in the interpretation of potential field data. The amplitude of the 3D analytic signal of magnetic data yields information on the location of the edges of the sources in both the horizontal and vertical dimensions, with the main advantage that the magnetic field and magnetic source parameters need not be known or assumed. Accurate detection of source body coordinates is becoming the main goal for interpreters and therefore enhanced techniques are acquiring an increasing revival in data interpretation. This paper presents a high-resolution approach for detecting source boundaries. These boundaries can be determined from the maxima of the analytic signal computed from the horizontal gradient of the field, defined here as a vector, the components of which are the analytic signals of x- and y-horizontal derivatives, respectively. Synthetic examples have shown the high resolving power of the proposed technique. This approach has also given very good results when applied to real data.

  1. Systematic inference of highways of horizontal gene transfer in prokaryotes.

    Science.gov (United States)

    Bansal, Mukul S; Banay, Guy; Harlow, Timothy J; Gogarten, J Peter; Shamir, Ron

    2013-03-01

    Horizontal gene transfer (HGT) plays a crucial role in the evolution of prokaryotic species. Typically, no more than a few genes are horizontally transferred between any two species. However, several studies identified pairs of species (or linages) between which many different genes were horizontally transferred. Such a pair is said to be linked by a highway of gene sharing. Inferring such highways is crucial to understanding the evolution of prokaryotes and for inferring past symbiotic and ecological associations among different species. We present a new improved method for systematically detecting highways of gene sharing. As we demonstrate using a variety of simulated datasets, our method is highly accurate and efficient, and robust to noise and high rates of HGT. We further validate our method by applying it to a published dataset of >22 000 gene trees from 144 prokaryotic species. Our method makes it practical, for the first time, to perform accurate highway analysis quickly and easily even on large datasets with high rates of HGT. An implementation of the method can be freely downloaded from: http://acgt.cs.tau.ac.il/hide.

  2. P1-19: Horizontal Vertical Illusion by Touch

    Directory of Open Access Journals (Sweden)

    Yoshinari Kinoshita

    2012-10-01

    Full Text Available Revesz (1934 Zeitschrift fur PsychologieBd. 1, Kap 20 and Bean (1938 Journal of Experimental Psychology 22 283–289. reported almost all the geometrical optical illusions existed in a tactual mode. Such a study can examine theories of visual illusions with modality-free theories. A number of articles have been devoted to the theory that repeated judgments decline the magnitude of visual illusion. In the current study, we examine whether repeated judgments decline the magnitude of geometrical haptic illusion. The Fick illusion (i.e., a horizontal vertical illusion was investigated. A graphics Braille display with 32×48 dots was used to present an inverted T haptically without vision. The horizontal line was consistently 49.2 mm long, and the vertical line was varied in each trial. Three subjects with normal sight participated. They judged which line was longer than the other. The point of subjective equality at which the subject perceives the two lines to be the same was measured using the method of constant stimuli. In the first session the mean PSE was about 13%; to compensate for the illusion, the vertical line must be set physically shorter than the horizontal line. We found that repeated judgments produced a reduction in illusion magnitude and dissolved the illusion entirely.

  3. Natural convection heat transfer within horizontal spent nuclear fuel assemblies

    Energy Technology Data Exchange (ETDEWEB)

    Canaan, R.E.

    1995-12-01

    Natural convection heat transfer is experimentally investigated in an enclosed horizontal rod bundle, which characterizes a spent nuclear fuel assembly during dry storage and/or transport conditions. The basic test section consists of a square array of sixty-four stainless steel tubular heaters enclosed within a water-cooled rectangular copper heat exchanger. The heaters are supplied with a uniform power generation per unit length while the surrounding enclosure is maintained at a uniform temperature. The test section resides within a vacuum/pressure chamber in order to subject the assembly to a range of pressure statepoints and various backfill gases. The objective of this experimental study is to obtain convection correlations which can be used in order to easily incorporate convective effects into analytical models of horizontal spent fuel systems, and also to investigate the physical nature of natural convection in enclosed horizontal rod bundles in general. The resulting data consist of: (1) measured temperatures within the assembly as a function of power, pressure, and backfill gas; (2) the relative radiative contribution for the range of observed temperatures; (3) correlations of convective Nusselt number and Rayleigh number for the rod bundle as a whole; and (4) correlations of convective Nusselt number as a function of Rayleigh number for individual rods within the array.

  4. Deterioration of horizontal saccades in progressive supranuclear palsy.

    Science.gov (United States)

    Terao, Yasuo; Fukuda, Hideki; Shirota, Yuichiro; Yugeta, Akihiro; Yoshioka, Masayuki; Suzuki, Masahiko; Hanajima, Ritsuko; Nomura, Yoshiko; Segawa, Masaya; Tsuji, Shoji; Ugawa, Yoshikazu

    2013-02-01

    To investigate horizontal saccade changes according to disease stage in patients with progressive supranuclear palsy (PSP). We studied visually and memory guided saccades (VGS and MGS) in 36 PSP patients at various disease stages, and compared results with those in 66 Parkinson's disease (PD) patients and 58 age-matched normal controls. Both vertical and horizontal saccades were affected in PSP patients, usually manifesting as "slow saccades" but sometimes as a sequence of small amplitude saccades with relatively well preserved velocities. Disease progression caused saccade amplitude reduction in PSP but not PD patients. In contrast, VGS and MGS latencies were comparable between PSP and PD patients, as were the frequencies of saccades to cue, suggesting that voluntary initiation and inhibitory control of saccades are similar in both disorders. Hypermetria was rarely observed in PSP patients with cerebellar ataxia (PSPc patients). The progressively reduced accuracy of horizontal saccades in PSP suggests a brainstem oculomotor pathology that includes the superior colliculus and/or paramedian pontine reticular formation. In contrast, the functioning of the oculomotor system above the brainstem was similar between PSP and PD patients. These findings may reflect a brainstem oculomotor pathology. Copyright © 2012 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

  5. Effects of Mg substitution on the structural and magnetic properties of Co0.5Ni0.5-x Mg x Fe2O4 nanoparticle ferrites

    Science.gov (United States)

    R, M. Rosnan; Z, Othaman; R, Hussin; Ali, A. Ati; Alireza, Samavati; Shadab, Dabagh; Samad, Zare

    2016-04-01

    In this study, nanocrystalline Co-Ni-Mg ferrite powders with composition Co0.5Ni0.5-x Mg x Fe2O4 are successfully synthesized by the co-precipitation method. A systematic investigation on the structural, morphological and magnetic properties of un-doped and Mg-doped Co-Ni ferrite nanoparticles is carried out. The prepared samples are characterized using x-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and vibrating sample magnetometry (VSM). The XRD analyses of the synthesized samples confirm the formation of single-phase cubic spinel structures with crystallite sizes in a range of ˜ 32 nm to ˜ 36 nm. The lattice constant increases with increasing Mg content. FESEM images show that the synthesized samples are homogeneous with a uniformly distributed grain. The results of IR spectroscopy analysis indicate the formation of functional groups of spinel ferrite in the co-precipitation process. By increasing Mg2+ substitution, room temperature magnetic measurement shows that maximum magnetization and coercivity increase from ˜ 57.35 emu/g to ˜ 61.49 emu/g and ˜ 603.26 Oe to ˜ 684.11 Oe (1 Oe = 79.5775 A·m-1), respectively. The higher values of magnetization M s and M r suggest that the optimum composition is Co0.5Ni0.4Mg0.1Fe2O4 that can be applied to high-density recording media and microwave devices. Project supported by the Ibnu Sina Institute for Scientific and Industrial Research, Physics Department of Universiti Teknologi Malaysia and the Ministry of Education Malaysia (Grant Nos. Q.J130000.2526.04H65).

  6. Temperature prediction model for a producing horizontal well

    Science.gov (United States)

    Dawkrajai, Pinan

    Distributed temperature sensors (DTS) are increasingly used for monitoring producing sections of horizontal wells. The temperature data from DTS are reliable, accurate and continuous in time (readings every few minutes) and space (readings every meter). One of the potential uses of DTS is to infer the amount and types of fluid entering horizontal sections. To perform such an inference requires a temperature model. A new analytical model was developed here for predicting the inflow temperature of a fluid entering a horizontal wellbore during production. The distinguishing aspect of the model is that it accounts for subtle thermal energy effects including fluid expansion, viscous dissipative heating, and thermal conduction. Reservoir inflow and wellbore flow are coupled by modeling the reservoir as multi-segmented reservoirs in which the direction of flow in the reservoir is perpendicular (not parallel) to the wellbore. The coupled model is then used to simulate several examples to illustrate how temperature changes with flow rate and type of fluid entering a wellbore. We further develop a numerical temperature model of a bottom water drive reservoir to demonstrate the uses of temperature profiles in detecting water entries. Water in this numerical model is initially located in a deeper and warmer zone below a horizontal well. Results show that oil or water can enter the wellbore 2-3 °F higher, while gas can enter with 5-6 °F lower, than the geothermal temperature. Inflow temperature causes the slope of the wellbore temperature profile to change notably, depending on the flow rates and types of fluid entering. The temperature profile can locate a zone that is producing excessive water or gas if the rate is large. The size of the temperature changes on the profiles is obviously detectable by DTS, which has a resolution as fine as 0.0045 °F for the time and spatial average of 1 hour and 50 feet if the cable range is less than 3,000 feet. This study has confirmed the

  7. Prática alimentar nos dois primeiros anos de vida

    Directory of Open Access Journals (Sweden)

    Daniela Braga Lima

    2011-12-01

    Full Text Available Avaliou-se prática alimentar de crianças menores de dois anos. Estudo transversal desenvolvido em 2004-2005, a partir de dados do Estudo de Consumo Alimentar Populacional de Belo Horizonte/ECAP-BH. A amostra compreendeu 148 crianças menores de dois anos. Realizou-se entrevista em domicílio com mães/responsáveis e levantou-se os alimentos consumidos nas últimas 24 horas, incluindo leite materno e idade de introdução da alimentação complementar. Medianas de aleitamento materno exclusiva e total foram 60 e 150 dias, respectivamente. A introdução de outros tipos de leite e de alimentos não-lácteos ocorreu precocemente. Do ponto de vista nutricional, as dietas eram desbalanceadas e o ferro foi o nutriente mais deficiente no primeiro ano de vida. Os resultados evidenciam a necessidade da implementação de medidas de intervenção nos serviços de saúde do município para a promoção da alimentação complementar saudável.

  8. O Mastomys natalensis como modelo alternativo nos estudos da esquistossomose mansoni experimental

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Moreira Campos

    1984-02-01

    Full Text Available Foram estudados aspectos da infecção e da imunidade experimentais em um roedor — o Mastomys natalensis — inoculado com a cepa LE (Belo Horizonte do Schistosoma mansoni, comparando os resultados com os do camundongo albino, animal tido como melhor modelo experimental. Os parâmetros estudados ofereceram resultados em tudo semelhantes aos encontrados em camundongos, com o M. natalensis se mostrando bastante sensível à infecção pelo S. mansoni, sendo de grande utilidade para os estudos da biologia do parasito e/ou observações da imu-nologia advinda da infecção. Somando-se a tal fato a grande reprodutividade do animal em cativeiro, a criação fácil, o manejo e a manutenção simples em laboratório, sugere-se que seja o M. natalensis usado como modelo experimental alternativo nos diversos estudos da esquistossomose mansoni.

  9. AB Initio Characterization of MgCCH, MgCCH(+), and MgC2, and Pathways to their Formation in the Interstellar Medium

    Science.gov (United States)

    Woon, David E.

    1996-01-01

    A study of Mg-bearing compounds has been performed in order to determine molecular properties which are critical for planning new astronomical searches and laboratory studies. The primary focus of the work is on MgCCH, MgCCH(+), and the isomers of MgC2. Only MgCCH has been identified in laboratory studies. Additional calculations have been carried out on MgH, MgNC, MgCN, and their cations in an effort to evaluate pathways to the formation of MgCCH and MgCCH(+) in the InterStellar Medium (ISM) or in circumstellar envelopes. Correlated ab initio methods and correlation-consistent basis sets have been employed. Properties including structures, rotational constants, dipole moments, and harmonic frequencies are reported. A transition state between linear MgCC and cyclic MgC2 has been characterized and was found to yield a minimal barrier (approx. 0.5 kcal/mole), indicating easy interconversion to the cyclic form. Direct reactions in the ISM between Mg or Mg(+) and HCCH are precluded by energetic considerations, but a number of ion- molecule or neutral-neutral exchange reactions between CCH and various Mg-containing species offer plausible pathways to MgCCH or MgCCH(+). Weakly bound MgH may react with CCH to form MgCCH, but MgH has not been detected. Both MgNC and MgCN have been observed, but reactions with CCH are slightly endothermic by 1-3 kcal/mole. Although MgH(+), MgNC(+), and MgCN(+) have not been detected, their reactions with CCH to form MgCCH(+) are all exothermic. With only a small barrier separating linear MgCC and cyclic MgC2, the dissociative recombination of MgCCH(+) with an electron is expected to yield cyclic MgC2, and regenerate Mg and CCH. New astronomical searches for MgCCH, MgCCH(+), cyclic MgC2, MgNC(+), and MgCN(+) will provide further insight into organo-magnesium astrochemistry.

  10. Pedagogical Reflections by Secondary Science Teachers at Different NOS Implementation Levels

    Science.gov (United States)

    Herman, Benjamin C.; Clough, Michael P.; Olson, Joanne K.

    2017-02-01

    This study investigated what 13 secondary science teachers at various nature of science (NOS) instruction implementation levels talked about when they reflected on their teaching. We then determined if differences exist in the quality of those reflections between high, medium, and low NOS implementers. This study sought to answer the following questions: (1) What do teachers talk about when asked general questions about their pedagogy and NOS pedagogy and (2) what qualitative differences, if any, exist within variables across teachers of varying NOS implementation levels? Evidence derived from these teachers' reflections indicated that self-efficacy and perceptions of general importance for NOS instruction were poor indicators of NOS implementation. However, several factors were associated with the extent that these teachers implemented NOS instruction, including the utility value they hold for NOS teaching, considerations of how people learn, understanding of NOS pedagogy, and their ability to accurately and deeply self-reflect about teaching. Notably, those teachers who effectively implemented the NOS at higher levels value NOS instruction for reasons that transcend immediate instructional objectives. That is, they value teaching NOS for achieving compelling ends realized long after formal schooling (e.g., lifelong socioscientific decision-making for civic reasons), and they deeply reflect about how to teach NOS by drawing from research about how people learn. Low NOS implementers' simplistic notions and reflections about teaching and learning appeared to be impeding factors to accurate and consistent NOS implementation. This study has implications for science teacher education efforts that promote NOS instruction.

  11. Hydrodechlorination of Tetrachloromethane over Palladium Catalysts Supported on Mixed MgF₂-MgO Carriers.

    Science.gov (United States)

    Bonarowska, Magdalena; Wojciechowska, Maria; Zieliński, Maciej; Kiderys, Angelika; Zieliński, Michał; Winiarek, Piotr; Karpiński, Zbigniew

    2016-11-25

    Pd/MgO, Pd/MgF₂ and Pd/MgO-MgF₂ catalysts were investigated in the reaction of CCl₄ hydrodechlorination. All the catalysts deactivated in time on stream, but the degree of deactivation varied from catalyst to catalyst. The MgF₂-supported palladium with relatively large metal particles appeared the best catalyst, characterized by good activity and selectivity to C₂-C₅ hydrocarbons. Investigation of post-reaction catalyst samples allowed to find several details associated with the working state of hydrodechlorination catalysts. The role of support acidity was quite complex. On the one hand, a definite, although not very high Lewis acidity of MgF₂ is beneficial for shaping high activity of palladium catalysts. The MgO-MgF₂ support characterized by stronger Lewis acidity than MgF₂ contributes to very good catalytic activity for a relatively long reaction period (~5 h) but subsequent neutralization of stronger acid centers (by coking) eliminates them from the catalyst. On the other hand, the role of acidity evolution, which takes place when basic supports (like MgO) are chlorided during HdCl reactions, is difficult to assess because different events associated with distribution of chlorided support species, leading to partial or even full blocking of the surface of palladium, which plays the role of active component in HdCl reactions.

  12. Mg2+-dependent gating of bacterial MgtE channel underlies Mg2+ homeostasis

    Science.gov (United States)

    Hattori, Motoyuki; Iwase, Norihiko; Furuya, Noritaka; Tanaka, Yoshiki; Tsukazaki, Tomoya; Ishitani, Ryuichiro; Maguire, Michael E; Ito, Koichi; Maturana, Andres; Nureki, Osamu

    2009-01-01

    The MgtE family of Mg2+ transporters is ubiquitously distributed in all phylogenetic domains. Recent crystal structures of the full-length MgtE and of its cytosolic domain in the presence and absence of Mg2+ suggested a Mg2+-homeostasis mechanism, in which the MgtE cytosolic domain acts as a ‘Mg2+ sensor' to regulate the gating of the ion-conducting pore in response to the intracellular Mg2+ concentration. However, complementary functional analyses to confirm the proposed model have been lacking. Moreover, the limited resolution of the full-length structure precluded an unambiguous characterization of these regulatory divalent-cation-binding sites. Here, we showed that MgtE is a highly Mg2+-selective channel gated by Mg2+ and elucidated the Mg2+-dependent gating mechanism of MgtE, using X-ray crystallographic, genetic, biochemical, and electrophysiological analyses. These structural and functional results have clarified the control of Mg2+ homeostasis through cooperative Mg2+ binding to the MgtE cytosolic domain. PMID:19798051

  13. Mg Incorporation Efficiency in Pulsed MOCVD of N-Polar GaN:Mg

    Science.gov (United States)

    Marini, Jonathan; Mahaboob, Isra; Hogan, Kasey; Novak, Steve; Bell, L. D.; Shahedipour-Sandvik, F.

    2017-10-01

    We report on the effect of growth polarity and pulsed or δ -doped growth mode on impurity incorporation in metalorganic chemical vapor deposition-grown GaN. In Ga-polar orientation, up to 12× enhancement in Mg concentration for given Mg flow rate is observed, resulting in enhanced p-type conductivity for these samples. In contrast, this enhancement effect is greatly diminished for N-polar samples, falling off with increasing Mg flow and showing maximum enhancement of 2.7× at 30 nmol/min Mg flow. At higher Mg flow rates, Mg incorporation at normal levels did not correspond to p-type conductivity, which may be due to Mg incorporation at nonacceptor sites. Concentrations of C, O, and Si were also investigated, revealing dependence on Mg flow in N-polar pulsed samples. Carbon incorporation was found to decrease with increasing Mg flow, and oxygen incorporation was found to remain high across varied Mg flow. These effects combine to result in N-polar samples that are not p-type when using the pulsed growth mode.

  14. Evaluating the need for surface treatments to reduce crash frequency on horizontal curves.

    Science.gov (United States)

    2013-10-01

    The application of high-friction surface treatments at appropriate horizontal curve locations throughout the : state has the potential to improve driver performance and reduce the number of crashes experienced at : horizontal curves. These treatments...

  15. Development of an improved method for determining advisory speeds on horizontal curves.

    Science.gov (United States)

    2016-07-01

    Horizontal curves are an integral part of the highway alignment. However, a disproportionately high number of severe : crashes occur on them. One method transportation agencies use to reduce the number crashes at horizontal curves is the : installati...

  16. Variabilidade espacial da taxa de infiltração de água e da espessura do horizonte A, em um Argissolo Vermelho-Amarelo, sob diferentes usos

    Directory of Open Access Journals (Sweden)

    F. C. Bertolani

    2001-12-01

    Full Text Available O experimento foi realizado no município de Vera Cruz (SP, no período de 1996 a 1998, com vistas em estudar a variabilidade espacial da taxa de infiltração de água em solo saturado e a espessura do horizonte A. O solo utilizado foi um Argissolo Vermelho-Amarelo eutrófico abrúptico, apresentando evidentes sinais de processos erosivos. As determinações de infiltração nos horizontes A, E e Bt, bem como da espessura do horizonte A, foram obtidas em malhas regulares de 40 x 40 m, com espaçamento de 5 x 5 m, totalizando 64 pontos, em café, pastagem e mata/capoeira. A análise das medidas de dispersão estatística revelou elevada variação das taxas de infiltração, bem como da espessura do horizonte A. Os semivariogramas indicaram a existência de dependência espacial da infiltração no horizonte E, em todos os usos amostrados. Com a utilização do semivario-grama cruzado, detectou-se a existência de correlação espacial entre a espessura do horizonte A e a infiltração, em cultivo de café e na mata/capoeira. A cobertura vegetal existente na mata/capoeira reduziu a perda do horizonte A, o que foi comprovado pela maior espessura e menor variação espacial.

  17. Unraveling the role of Mg(++) in osteoarthritis.

    Science.gov (United States)

    Li, Yaqiang; Yue, Jiaji; Yang, Chunxi

    2016-02-15

    Mg(++) is widely involved in human physiological processes that may play key roles in the generation and progression of diseases. Osteoarthritis (OA) is a complex joint disorder characterized by articular cartilage degradation, abnormal mineralization and inflammation. Magnesium deficiency is considered to be a major risk factor for OA development and progression. Magnesium deficiency is active in several pathways that have been implicated in OA, including increased inflammatory mediators, cartilage damage, defective chondrocyte biosynthesis, aberrant calcification and a weakened effect of analgesics. Abundant in vitro and in vivo evidence in animal models now suggests that the nutritional supplementation or local infiltration of Mg(++) represent effective therapies for OA. The goal of this review is to summarize the current understanding of the role of Mg(++) in OA with particular emphasis on the related molecular mechanisms involved in OA progression. Copyright © 2016 Elsevier Inc. All rights reserved.

  18. "Safe" Coulomb Excitation of $^{30}$Mg

    CERN Document Server

    Niedermaier, O; Bildstein, V; Boie, H; Fitting, J; Von Hahn, R; Köck, F; Lauer, M; Pal, U K; Podlech, H; Repnow, R; Schwalm, D; Alvarez, C; Ames, F; Bollen, G; Emhofer, S; Habs, D; Kester, O; Lutter, R; Rudolph, K; Pasini, M; Thirolf, P G; Wolf, B H; Eberth, J; Gersch, G; Hess, H; Reiter, P; Thelen, O; Warr, N; Weisshaar, D; Aksouh, F; Van den Bergh, P; Van Duppen, P; Huyse, M; Ivanov, O; Mayet, P; Van de Walle, J; Äystö, J; Butler, P A; Cederkäll, J; Delahaye, P; Fynbo, H O U; Fraile-Prieto, L M; Forstner, O; Franchoo, S; Köster, U; Nilsson, T; Oinonen, M; Sieber, T; Wenander, F; Pantea, M; Richter, A; Schrieder, G; Simon, H; Behrens, T; Gernhäuser, R; Kröll, T; Krücken, R; Münch, M M; Davinson, T; Gerl, J; Huber, G; Hurst, A; Iwanicki, J; Jonson, B; Lieb, P; Liljeby, L; Schempp, A; Scherillo, A; Schmidt, P; Walter, G

    2005-01-01

    We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient $\\gamma$ -spectrometer MINIBALL. Using $^{30}$Mg ions accelerated to an energy of 2.25MeV/u together with a thin $^{nat}$Ni target, Coulomb excitation of the first excited 2+ states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative de-excitation $\\gamma$ -ray yields the B(E2; 0$^{+}_{gs} \\rightarrow 2^{+}_{1}$) value of $^{30}$Mg was determined to be 241(31)$e^{2}$fm$^{4}$. Our result is lower than values obtained at projectile fragmenttion facilities using the intermediate-energy Coulomb excitation method and confirms that the theoretical conjecture that the neutron-rich magnesium isotope $^{30}$Mg lies still outside the "island of inversion".

  19. Confiança nos relacionamentos em cluster de empresas

    Directory of Open Access Journals (Sweden)

    Roberta de Cássia Macedo

    2017-08-01

    Full Text Available This study aims to integrate interorganizational relationships (both vertical and horizontal ones through the perception of trust in businesses’ collaborative behavior. We will use as our empirical field the Brazilian furniture industry production clusters situated in the cities of Arapongas, Mirassol, Ubá and Bento Gonçalves. Data were collected through questionnaires which were administered in loco and analyzed using correlation analysis and the Granger causality test. Trust was analyzed in the benevolence dimension and its relationship with commitment. Results demonstrated that there is causality in the horizontal relationship and that there is no causality in relationships between suppliers and clients, nor in relationships between those and competitors. However, there is a strong correlation between trust in clients and horizontal relationships. Therefore, it was verified that the presence of trust in interorganizational relationships is independent and isolated, and not a permanent, routine attitude.

  20. Heat transfer by natural convection into an horizontal cavity; Transferencia de calor por conveccion natural en una cavidad horizontal

    Energy Technology Data Exchange (ETDEWEB)

    Arevalo J, P

    1998-12-31

    At this thesis it is studied the heat transfer by natural convection in an horizontal cavity, it is involved a boiling`s part that is described the regimes and correlations differences for boiling`s curve. It is designed a horizontal cavity for realize the experimental part and it`s mention from equipment or instrumentation to succeed in a experimentation that permits to realize the analysis of heat transfer, handling as water fluid at atmospheric pressure and where it`s present process from natural convection involving part boiling`s subcooled. The system consists of heater zone submerged in a horizontal cavity with water. Once part finished experimental with information to obtained it`s proceeded to obtain a correlation, realized starting from analysis dimensionless such as: Jakob, Bond and Grasoft (Boiling) besides of knows in natural convection: Prandtl and Nusselt. The mathematical model explains the behavior for natural convection continued part boiling`s subcooled. It is realize analysis graphics too where it`s show comparing with Globe Dropkin and Catton equations by natural convection with bottom heating. (Author)

  1. How do horizontal cells 'talk' to cone photoreceptors? Different levels of complexity at the cone-horizontal cell synapse.

    Science.gov (United States)

    Chapot, Camille A; Euler, Thomas; Schubert, Timm

    2017-08-15

    The first synapse of the retina plays a fundamental role in the visual system. Due to its importance, it is critical that it encodes information from the outside world with the greatest accuracy and precision possible. Cone photoreceptor axon terminals contain many individual synaptic sites, each represented by a presynaptic structure called a 'ribbon'. These synapses are both highly sophisticated and conserved. Each ribbon relays the light signal to one ON cone bipolar cell and several OFF cone bipolar cells, while two dendritic processes from a GABAergic interneuron, the horizontal cell, modulate the cone output via parallel feedback mechanisms. The presence of these three partners within a single synapse has raised numerous questions, and its anatomical and functional complexity is still only partially understood. However, the understanding of this synapse has recently evolved, as a consequence of progress in understanding dendritic signal processing and its role in facilitating global versus local signalling. Indeed, for the downstream retinal network, dendritic processing in horizontal cells may be essential, as they must support important functional operations such as contrast enhancement, which requires spatial averaging of the photoreceptor array, while at the same time preserving accurate spatial information. Here, we review recent progress made towards a better understanding of the cone synapse, with an emphasis on horizontal cell function, and discuss why such complexity might be necessary for early visual processing. © 2017 The Authors. The Journal of Physiology © 2017 The Physiological Society.

  2. Expression analysis of NOS family and HSP genes during thermal stress in goat ( Capra hircus)

    Science.gov (United States)

    Yadav, Vijay Pratap; Dangi, Satyaveer Singh; Chouhan, Vikrant Singh; Gupta, Mahesh; Dangi, Saroj K.; Singh, Gyanendra; Maurya, Vijay Prakash; Kumar, Puneet; Sarkar, Mihir

    2016-03-01

    Approximately 50 genes other than heat shock protein (HSP) expression changes during thermal stress. These genes like nitric oxide synthase (NOS) need proper attention and investigation to find out their possible role in the adaptation to thermal stress in animals. So, the present study was undertaken to demonstrate the expressions of inducible form type II NOS (iNOS), endothelial type III NOS (eNOS), constitutively expressed enzyme NOS (cNOS), HSP70, and HSP90 in peripheral blood mononuclear cells (PBMCs) during different seasons in Barbari goats. Real-time polymerase chain reaction, western blot, and immunocytochemistry were applied to investigate messenger RNA (mRNA) expression, protein expression, and immunolocalization of examined factors. The mRNA and protein expressions of iNOS, eNOS, cNOS, HSP70, and HSP90 were significantly higher ( P homeostasis in goats.

  3. Optimal conditions for chlorothalonil and dissolved organic carbon in horizontal subsurface flow constructed wetlands.

    Science.gov (United States)

    Rìos-Montes, Karina A; Casas-Zapata, Juan C; Briones-Gallardo, Roberto; Peñuela, Gustavo

    2017-04-03

    The most efficient system of horizontal subsurface flow constructed wetlands (HSSFCW) for removing dissolved organic carbon (DOC) in the presence of chlorothalonil pesticide (CLT) present in synthetic domestic wastewater was determined using the macrophyte Phragmites australis. Two concentrations of CLT (85 and 385 μg L-1) and one concentration of glucose (20 mg L-1) were evaluated in four pilot scale horizontal surface flow constructed wetlands coupled with two sizes of silica gravel, igneous gravel, fine chalky gravel (3.18-6.35 mm), coarse gravel (12.70-25.40 mm) and two water surface heights (20 and 40 cm). For a month, wetlands were acclimated with domestic wastewater. Some groups of bacteria were also identified in the biofilm attached to the gravel. In each treatment periodic samplings were conducted in the influent and effluent. Chlorothalonil was quantified by gas chromatography (GC-ECD m), DOC by an organic carbon analyzer and bacterial groups using conventional microbiology in accordance with Standard Methods. The largest removals of DOC (85.82%-85.31%) were found when using fine gravel (3.18-6.35 mm) and the lower layer of water (20 cm). The bacterial groups quantified in the biofilm were total heterotrophic, revivable heterotrophic, Pseudomonas and total coliforms. The results of this study indicate that fine grain gravel (3.18-6.35 mm) and both water levels (20 to 40 cm) can be used in the removal of organic matter and for the treatment of agricultural effluents contaminated with organo-chloride pesticides like CLT in HSSFCW.

  4. Anemia entre pre-escolares - um problema de saude publica em Belo Horizonte, Brasil

    Directory of Open Access Journals (Sweden)

    Thais de Souza Chaves de Oliveira

    2014-01-01

    Full Text Available O artigo tem por objetivo determinar a prevalência de anemia em crianças matriculadas em creches da regional Centro-Sul de Belo Horizonte (MG, identificando fatores biológicos e socioeconômicos associados. Estudo transversal descritivo realizado em 18 creches. Foram avaliadas 373 crianças com base em amostragem estratificada por instituição participante. A hemoglobina (Hb sérica foi determinada por punção capilar e leitura em β-hemoglobinômetro, adotando-se pontos de corte para anemia de Hb < 11,0g/dL para crianças de seis a 60 meses e Hb < 11,5g/dL para aquelas com idade superior, preconizados pela OMS. O estado nutricional foi definido por aferição do peso e altura e confecção dos índices Peso/Idade (P/I, Estatura/Idade (E/I e IMC/Idade (IMC/I. Entre os participantes 54% eram meninas. A média de idade foi de 38,1 ± 6,2 meses. A prevalência global de anemia foi de 38,3%, sendo superior nas crianças com idade inferior ou igual a 24 meses (56,1%. Encontrou-se associação significativa entre anemia e os fatores menor idade da criança, menor idade materna e baixa renda familiar. O estudo mostrou que anemia em crianças de creches de Belo Horizonte constitui relevante problema de saúde pública, sinalizando a necessidade de se implantar ações específicas para mitigação dos riscos por ele apontados.

  5. Ethanol and toluene removal in a horizontal-flow anaerobic immobilized biomass reactor in the presence of sulfate.

    Science.gov (United States)

    Cattony, E B M; Chinalia, F A; Ribeiro, R; Zaiat, M; Foresti, E; Varesche, M B A

    2005-07-20

    In this study it is reported the operation of a horizontal-flow anaerobic immobilized biomass (HAIB) reactor under sulfate-reducing condition which was also exposed to different amounts of ethanol and toluene. The system was inoculated with sludge taken from up-flow anaerobic sludge blanket (UASB) reactors treating refuses from a poultry slaughterhouse. The HAIB reactor comprised of an immobilized biomass on polyurethane foam and ferrous and sodium sulfate solutions were used (91 and 550 mg/L, respectively), to promote a sulfate-reducing environment. Toluene was added at an initial concentration of 2.0 mg/L followed by an increased range of different amendments (5, 7, and 9 mg/L). Ethanol was added at an initial concentration of 170 mg/L followed by an increased range of 960 mg/L. The reactor was operated at 30(+/-2) degrees C with hydraulic detention time of 12 h. Organic matter removal efficiency was close to 90% with a maximum toluene degradation rate of 0.06 mg(toluene)/mg(vss)/d. Sulfate reduction was close to 99.9% for all-nutritional amendments. Biofilm microscopic characterization revealed a diversity of microbial morphologies and DGGE-profiling showed a variation of bacterial and sulfate reducing bacteria (SRB) populations, which were significantly associated with toluene amendments. Diversity of archaea remained unaltered during the different phases of this experiment. Thus, this study demonstrates that compact units of HAIB reactors, under sulfate reducing conditions, are a potential alternative for in situ aromatics bioremediation.

  6. Structural, elastic, electronic, and thermodynamic properties of MgAgSb investigated by density functional theory

    Science.gov (United States)

    Wang, Jun-Fei; Fu, Xiao-Nan; Zhang, Xiao-Dong; Wang, Jun-Tao; Li, Xiao-Dong; Jiang, Zhen-Yi

    2016-08-01

    The structural, elastic, electronic, and thermodynamic properties of thermoelectric material MgAgSb in γ,β,α phases are studied with first-principles calculations based on density functional theory. The optimized lattice constants accord well with the experimental data. According to the calculated total energy of the three phases, the phase transition order is determined from α to γ phase with cooling, which is in agreement with the experimental result. The physical properties such as elastic constants, bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio, and anisotropy factor are also discussed and analyzed, which indicates that the three structures are mechanically stable and each has a ductile feature. The Debye temperature is deduced from the elastic properties. The total density of states (TDOS) and partial density of states (PDOS) of the three phases are investigated. The TDOS results show that the γ phase is most stable with a pseudogap near the Fermi level, and the PDOS analysis indicates that the conduction band of the three phases is composed mostly of Mg-3s, Ag-4d, and Sb-5p. In addition, the changes of the free energy, entropy, specific heat, thermal expansion of γ-MgAgSb with temperature are obtained successfully. The obtained results above are important parameters for further experimental and theoretical tuning of doped MgAgSb as a thermoelectric material at high temperature. Project supported by the National Natural Science Foundation of China (Grant No. 11504088), the Fund from Henan University of Technology, China (Grant Nos. 2014YWQN08 and 2013JCYJ12), the Natural Science Fund from the Henan Provincial Education Department, China (Grant No. 16A140027), the Natural Science Foundation of Shaanxi Province of China (Grant Nos. 2013JQ1018 and 15JK1759), and the Science Foundation of Northwest University of China (Grant No. 14NW23).

  7. Facial fractures: a 1-year retrospective study in a hospital in Belo Horizonte Fraturas de face: um estudo retrospectivo de 1 ano em um hospital de Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Bruno Ramos Chrcanovic

    2004-12-01

    Full Text Available A retrospective study was performed to assess facial fractures in patients treated at a public hospital in Belo Horizonte, in 2000. The data collected included age, gender, etiology, distribution of maxillofacial trauma considering day of the week and month, anatomic site of the fracture, and treatment. The analyses involved descriptive statistics and chi-squared test, Bonferroni test and analysis of variance. A total of 1,326 facial fractures were found in 911 patients. Most fractures occurred in adults with age ranging from 21 to 30 years. Men were more affected than women, with a male-female ratio of 4.69:1. Accidents causing facial fractures occurred predominantly on weekends. Bicycle and motorcycle accidents were the major cause of trauma, followed by interpersonal violence, automobile accidents, and falls. When the relation between the gender and the etiology of facial fractures was analyzed, a significant relation was noted between these variables (p Um estudo retrospectivo foi realizado para avaliar fraturas faciais em pacientes atendidos no ano de 2000 em um hospital público de Belo Horizonte. As informações coletadas incluíam idade, sexo, etiologia, distribuição do trauma de acordo com o dia da semana e o mês, o local anatômico da fratura e o tratamento. As análises envolveram estatísticas descritivas, teste qui-quadrado, teste Bonferroni e análise de variância. Foram encontradas 1.326 fraturas de face em 911 pacientes. A maioria das fraturas ocorreu em adultos na faixa etária de 21 a 30 anos. Os homens foram mais acometidos do que as mulheres, numa proporção homem:mulher de 4,69:1. Os traumas causadores de fraturas faciais ocorreram predominantemente nos fins de semana. Os acidentes de moto e bicicleta foram a maior causa de trauma, seguidos por violência interpessoal, acidentes automobilísticos e quedas. Quando analisada a relação entre o gênero e a etiologia das fraturas de face, observou-se uma associa

  8. Continuous measurements of discharge from a horizontal acoustic Doppler current profiler in a tidal river

    NARCIS (Netherlands)

    Hoitink, A.J.F.; Buschman, F.A.; Vermeulen, B.

    2009-01-01

    Acoustic Doppler current profilers (ADCPs) can be mounted horizontally at a river bank, yielding single-depth horizontal array observations of velocity across the river. This paper presents a semideterministic, semistochastic method to obtain continuous measurements of discharge from horizontal ADCP

  9. Vertical and horizontal distribution of wind speed and air temperature in a dense vegetation canopy

    NARCIS (Netherlands)

    Jacobs, A.F.G.; van Boxel, J.H.; El-Kilani, R.M.M.

    1995-01-01

    Wind speed and temperature were measured within a corn row canopy to investigate horizontal and vertical variability of the mean wind speed and temperature. It appears that the mean wind speed can vary between 20% and 30% from its horizontal mean value. In the narrow row crop, the horizontal mean

  10. Role of vegetation (Typha latifolia) on nutrient removal in a horizontal subsurface-flow constructed wetland treating UASB reactor-trickling filter effluent.

    Science.gov (United States)

    da Costa, Jocilene Ferreira; Martins, Weber Luiz Pinto; Seidl, Martin; von Sperling, Marcos

    2015-01-01

    The main objective of the work is to characterize the role of plants in a constructed wetland in the removal of nitrogen (N) and phosphorus (P). The experiments were carried out in a full-scale system in the city of Belo Horizonte, Brazil, with two parallel horizontal subsurface-flow constructed wetland units (one planted with Typha latifolia and one unplanted) treating the effluent from a system composed of an upflow anaerobic sludge blanket reactor and a trickling filter (TF). Each wetland unit received a mean flow of approximately 8.5 m³ d⁻¹ (population equivalent around 60 inhabitants each), with a surface hydraulic loading rate 0.12 m³m⁻²d⁻¹. The experiments were conducted from September 2011 to July 2013. Mean effluent concentrations from the wetlands were: (a) planted unit total nitrogen (TN) 22 mg L⁻¹, ammonia-N 19 mg L⁻¹, nitrite-N 0.10 mg L⁻¹, nitrate-N 0.25 mg L⁻¹, P-total 1.31 mg L⁻¹; and (b) unplanted unit TN 24 mg L⁻¹, ammonia-N 20 mg L⁻¹, nitrite-N 0.54 mg mL⁻¹, nitrate-N 0.15 mg L⁻¹, P-total 1.31 mg L⁻¹. The aerial part of the plant contained mean values of 24.1 gN (kg dry matter)⁻¹ and 4.4 gP (kg dry matter)⁻¹, and the plant root zone was composed of 16.5 gN (kg dry matter)⁻¹ and 4.1 gP (kg dry matter)⁻¹. The mean extraction of N by the plant biomass was 726 kgN ha⁻¹y⁻¹, corresponding to 17% of the N load removed. For P, the extraction by the plant biomass was 105 kgP ha⁻¹y⁻¹, corresponding to 9% of the P load removed. These results reinforce the reports that N and P removal due to plant uptake is a minor mechanism in horizontal subsurface-flow constructed wetlands operating under similar loading rates, typical for polishing of sanitary effluent.

  11. The reactive Mg-liquid infiltration to obtain long superconducting MgB$_{2}$ cables

    CERN Document Server

    Giunchi, G

    2009-01-01

    An alternative “in situ” process to the MgB2 wire manufacturing is represented by the Reactive Mg-Liquid Infiltration (Mg-RLI) process [1], in which the precursor wire is constituted by a metallic sheath encasing a central Mg rod, surrounded by the B powders. We demonstrated that this peculiar “internal Mg” assembly is able to produce very dense superconducting material of high critical current density, with an acceptable fill factor, up to 0.28. Furthermore the Mg-RLI allows also to easily dope the MgBB2 material either by carbon or nanoSiC powders. In order to realize long cables with this technique, two different approaches may be applied. The first one relies on the assembly of thin wires, fine enough that the liquid Mg cannot freely percolate along the wire during the reaction, and the second one relies on the assembly of thick hollow wires, reacted with a continuous supply of Mg to avoid deficiency of Mg in some part of the precursor wire. Both techniques have been demonstrated feasible and the ...

  12. Electronic structure of MgB2

    Indian Academy of Sciences (India)

    Boron isotope effect [2] has been observed in MgB2 re- vealing that the pairing mechanism ... energy there is a flat band which is predominantly of boron 2p origin. This band makes a large contribution to the ... This yields a Tc = 24.7 K. We thus find that a phonon mediated theory of strong coupling superconductivity gives a ...

  13. doped LiMgPO4 phosphor

    Indian Academy of Sciences (India)

    Optically stimulated luminescence (OSL) is a well- established technique in personal and medical dosimetry, ... first suggested for personal dosimetry in 1950s. Further, it was spurred by introduction of a method .... product in sample. The LiMgPO4 phosphor was orthorhombic, with the space group Pnma with a about twice.

  14. Hydrogenation properties of Mg-Al alloys

    DEFF Research Database (Denmark)

    Andreasen, Anders

    2008-01-01

    . Further, it is found that the kinetics of hydrogenation, as well dehydrogenation, may be significantly improved by alloying compared to pure Mg. The expense of these improvements of the hydrogenation/dehydrogenation properties is a lower gravimetric hydrogen density in the hydrogenated product, (C) 2008...

  15. exchanged Mg-Al hydrotalcite catalyst

    Indian Academy of Sciences (India)

    The MnO. −1. 4 - exchanged Mg–Al-hydrotalcite (Mg/Al = 10) showed high activity in the oxidation of different aromatic and aliphatic aldehydes to their corresponding acids and also showed excellent reusability in the oxidation process which is environmental-friendly. Keywords. Aldehyde; acid; oxidation; TBHP; MnO. −1.

  16. Electronic structure of MgB 2

    Indian Academy of Sciences (India)

    Results of ab initio electronic structure calculations on the compound MgB2 using the FPLAPW method employing GGA for the exchange-correlation energy are presented. Total energy minimization enables us to estimate the equilibrium volume, / ratio and the bulk modulus, all of which are in excellent agreement with ...

  17. Plasmid and clonal interference during post horizontal gene transfer evolution.

    Science.gov (United States)

    Bedhomme, S; Perez Pantoja, D; Bravo, I G

    2017-04-01

    Plasmids are nucleic acid molecules that can drive their own replication in a living cell. They can be transmitted horizontally and can thrive in the host cell to high-copy numbers. Plasmid replication and gene expression consume cellular resources and cells carrying plasmids incur fitness costs. But many plasmids carry genes that can be beneficial under certain conditions, allowing the cell to endure in the presence of antibiotics, toxins, competitors or parasites. Horizontal transfer of plasmid-encoded genes can thus instantaneously confer differential adaptation to local or transient selection conditions. This conflict between cellular fitness and plasmid spread sets the scene for multilevel selection processes. We have engineered a system to study the short-term evolutionary impact of different synonymous versions of a plasmid-encoded antibiotic resistance gene. Applying experimental evolution under different selection conditions and deep sequencing allowed us to show rapid local adaptation to the presence of antibiotic and to the specific version of the resistance gene transferred. We describe the presence of clonal interference at two different levels: at the within-cell level, because a single cell can carry several plasmids, and at the between-cell level, because a bacterial population may contain several clones carrying different plasmids and displaying different fitness in the presence/absence of antibiotic. Understanding the within-cell and between-cell dynamics of plasmids after horizontal gene transfer is essential to unravel the dense network of mobile elements underlying the worldwide threat to public health of antibiotic resistance. © 2017 John Wiley & Sons Ltd.

  18. Dynamic monitoring of horizontal gene transfer in soil

    Science.gov (United States)

    Cheng, H. Y.; Masiello, C. A.; Silberg, J. J.; Bennett, G. N.

    2015-12-01

    Soil microbial gene expression underlies microbial behaviors (phenotypes) central to many aspects of C, N, and H2O cycling. However, continuous monitoring of microbial gene expression in soils is challenging because genetically-encoded reporter proteins widely used in the lab are difficult to deploy in soil matrices: for example, green fluorescent protein cannot be easily visualized in soils, even in the lab. To address this problem we have developed a reporter protein that releases small volatile gases. Here, we applied this gas reporter in a proof-of-concept soil experiment, monitoring horizontal gene transfer, a microbial activity that alters microbial genotypes and phenotypes. Horizontal gene transfer is central to bacterial evolution and adaptation and is relevant to problems such as the spread of antibiotic resistance, increasing metal tolerance in superfund sites, and bioremediation capability of bacterial consortia. This process is likely to be impacted by a number of matrix properties not well-represented in the petri dish, such as microscale variations in water, nutrients, and O2, making petri-dish experiments a poor proxy for environmental processes. We built a conjugation system using synthetic biology to demonstrate the use of gas-reporting biosensors in safe, lab-based biogeochemistry experiments, and here we report the use of these sensors to monitor horizontal gene transfer in soils. Our system is based on the F-plasmid conjugation in Escherichia coli. We have found that the gas signal reports on the number of cells that acquire F-plasmids (transconjugants) in a loamy Alfisol collected from Kellogg Biological Station. We will report how a gas signal generated by transconjugants varies with the number of F-plasmid donor and acceptor cells seeded in a soil, soil moisture, and soil O2 levels.

  19. Geophysical investigations in deep horizontal holes drilled ahead of tunnelling

    Science.gov (United States)

    Carroll, R.D.; Cunningham, M.J.

    1980-01-01

    Deep horizontal drill holes have been used since 1967 by the Defense Nuclear Agency as a primary exploration tool for siting nuclear events in tunnels at the Nevada Test Site. The U.S. Geological Survey had developed geophysical logging techniques for obtaining resistivity and velocity in these holes, and to date 33 horizontal drill holes in excess of 300 m in depth have been successfully logged. The deepest hole was drilled to a horizontal depth of 1125 m. The purposes of the logging measurements are to define clay zones, because of the unstable ground conditions such zones can present to tunnelling, and to define zones of partially saturated rock, because of the attenuating effects such zones have on the shock wave generated by the nuclear detonation. Excessive attenuation is undesirable because the shock wave is used as a tunnel closure mechanism to contain debris and other undesirable explosion products. Measurements are made by pumping resistivity, sonic and geophone probes down the drill string and out of the bit into the open hole. Clay zones are defined by the electrical resistivity technique based on empirical data relating the magnitude of the resistivity measurement to qualitative clay content. Rock exhibiting resistivity of less than 20 ??-m is considered potentially unstable, and resistivities less than 10 ??-m indicate appreciable amounts of clay are present in the rock. Partially saturated rock zones are defined by the measurement of the rock sound speed. Zones in the rock which exhibit velocities less than 2450 m/sec are considered of potential concern. ?? 1980.

  20. Scanning anisotropy parameters in horizontal transversely isotropic media

    KAUST Repository

    Masmoudi, Nabil

    2016-10-12

    The horizontal transversely isotropic model, with arbitrary symmetry axis orientation, is the simplest effective representative that explains the azimuthal behaviour of seismic data. Estimating the anisotropy parameters of this model is important in reservoir characterisation, specifically in terms of fracture delineation. We propose a travel-time-based approach to estimate the anellipticity parameter η and the symmetry axis azimuth ϕ of a horizontal transversely isotropic medium, given an inhomogeneous elliptic background model (which might be obtained from velocity analysis and well velocities). This is accomplished through a Taylor\\'s series expansion of the travel-time solution (of the eikonal equation) as a function of parameter η and azimuth angle ϕ. The accuracy of the travel time expansion is enhanced by the use of Shanks transform. This results in an accurate approximation of the solution of the non-linear eikonal equation and provides a mechanism to scan simultaneously for the best fitting effective parameters η and ϕ, without the need for repetitive modelling of travel times. The analysis of the travel time sensitivity to parameters η and ϕ reveals that travel times are more sensitive to η than to the symmetry axis azimuth ϕ. Thus, η is better constrained from travel times than the azimuth. Moreover, the two-parameter scan in the homogeneous case shows that errors in the background model affect the estimation of η and ϕ differently. While a gradual increase in errors in the background model leads to increasing errors in η, inaccuracies in ϕ, on the other hand, depend on the background model errors. We also propose a layer-stripping method valid for a stack of arbitrary oriented symmetry axis horizontal transversely isotropic layers to convert the effective parameters to the interval layer values.

  1. Nível socioeconômico, qualidade e eqüidade das escolas de Belo Horizonte Nivel socioeconómico, calidad e imparcialidad en las escuelas de Belo Horizonte Socioeconomic status, quality and equity in the schools of Belo Horizonte

    Directory of Open Access Journals (Sweden)

    Jose Francisco Soares

    2006-03-01

    Full Text Available Entre os fatores que impactam o desempenho cognitivo dos alunos da educação básica destacam-se sua família, as estruturas da sociedade e a escola que ele estuda. A forma de medir estes fatores sofreu enorme impacto com a popularização de duas novas técnicas estatísticas: a Teoria de Resposta ao Item (TRI e os modelos de regressão para dados hierárquicos. Nesse trabalho apresentam-se três medidas caracterizadoras de uma escola; sua posição construída com ajuda da TRI a partir de indicadores fornecidos pelos alunos, medidas da qualidade e medidas da eqüidade criadas com ajuda dos modelos hierárquicos. A base de dados utilizada é composta por informações provenientes dos questionários socioeconômicos e pelas medidas de desempenho cognitivo dos estudantes das escolas de Belo Horizonte presentes no SIMAVE 2002 e nos vestibulares da UFMG em 2002, 2003 e 2004. A análise da qualidade das escolas de Belo Horizonte, através de modelo onde a influência do nível socioeconômico no desempenho dos alunos é controlada, mostra uma dimensão otimista da realidade. Algumas escolas, públicas e privadas, pelas suas políticas e práticas pedagógicas conseguem fazer diferença no desempenho de seus alunos mesmo quando eles são socioeconomicamente desfavorecidos. Por outro lado, hoje o sistema de educação básica de Belo Horizonte só consegue produzir qualidade na presença de alta iniqüidade. O acesso está garantido, mas apenas alguns terminam a educação básica com desempenho nos níveis de desempenho adequados.Entre los factores que impactan en el logro cognitivo de los estudiantes de educación básica (que comprende la enseñanza primaria y secundaria se destaca la familia, las estructuras de la sociedad y la escuela donde ellos estudian. La forma de medir estos factores sufrió un impacto enorme con la adopción de nuevas técnicas estadísticas: la Teoría de Respuesta al Item (Item Response Theory - IRT y de los Modelos Jer

  2. Los medios de comunicación ¿nos igualan o nos diferencian?

    Directory of Open Access Journals (Sweden)

    Javier BALLESTA PAGÁN

    2009-05-01

    Full Text Available RESUMEN: En este artículo presentamos los resultados obtenidos en una investigación llevada a cabo en los centros educativos de Educación Secundaria Obligatoria de la Región de Murcia donde se ha pretendido valorar el equipamiento, el acceso a la información y el consumo de medios de comunicación en el hogar, por parte del alumnado inmigrante en comparación con el autóctono. Los datos aportados de dicho estudio nos confirman que la mayoría de los recursos más utilizados en el hogar es menor en los hogares del alumnado inmigrante de Educación Secundaria Obligatoria (ESO respecto al resto de la muestra en general de los alumnos. Por otra parte, el acceso a los medios, para estos alumnos inmigrantes, corrobora que son considerados recursos de gran importancia como vehículos en su acercamiento al aprendizaje y al entretenimiento. En cuanto al uso personal de dichos medios de comunicación observamos que mientras el ordenador, el móvil y el DVD son muy utilizados, comprobamos cómo desciende su uso e interés cuando abordamos otros medios de papel impreso, entre los que destacamos el libro y el periódico. Sin embargo, el uso de la televisión es bastante similar en ambos colectivos. Con relación al acceso a Internet, los resultados analizados parecen confirmar que el hogar se convierte en el lugar adecuado para su uso en ambas muestras, por encima de otros espacios públicos o privados. Sin embargo, si comprobamos la disponibilidad de acceso al mismo en el hogar por parte del alumnado inmigrante, destacamos que es menor de la que disponen los hogares autóctonos. En relación con la lectura, el nivel lector de estos jóvenes inmigrantes es también menor, aunque no existe una gran diferencia, respecto de la muestra de alumnos autóctonos. Al valorar el uso que hacen de la biblioteca comprobamos que más de la mitad de los alumnos afirman ir a ella, pero preferentemente a la pública más que la biblioteca del centro o a la de otras

  3. Horizontal cosmic ray muon radiography for imaging nuclear threats

    Science.gov (United States)

    Morris, Christopher L.; Bacon, Jeffrey; Borozdin, Konstantin; Fabritius, Joseph; Miyadera, Haruo; Perry, John; Sugita, Tsukasa

    2014-07-01

    Muon tomography is a technique that uses information contained in the Coulomb scattering of cosmic ray muons to generate three dimension images of volumes between tracking detectors. Advantages of this technique are the muons ability to penetrate significant overburden and the absence of any additional dose beyond the natural cosmic ray flux. Disadvantages include the long exposure times and limited resolution because of the low flux. Here we compare the times needed to image objects using both vertically and horizontally mounted tracking detectors and we develop a predictive model for other geometries.

  4. Reparacion espontánea de fractura radicular horizontal

    OpenAIRE

    Jorge Elias Dancur Turizo; Antonio Diaz Caballero; Gustavo Velazco Zuñiga

    2013-01-01

    Resumen Se reporta un caso clínico de una fractura radicular horizontal en un central superior izquierdo, que reparó espontáneamente sin tratamiento dental alguno. La fractura se diagnosticó catorce años después de recibir el trauma, en un examen radiográfico rutinario de la consulta endodóntica, ya que el diente sin ninguna sintomatología presentaba al examen clínico cambio de color y al examen radiográfico se observaba zona radiolúcida en la zona apical, por lo que fue remitida del posgrado...

  5. Modeling and analysis of a horizontally-aligned energy harvester

    Directory of Open Access Journals (Sweden)

    Bendame M.

    2014-01-01

    Full Text Available In this paper we analyse an impact-type vibration energy harvester. In this study, the harvester is positioned so that the electromagnetic transducer moves along a horizontal linear guide when subjected to base excitations. The governing equation is a nonsmooth second order differential equation which cannot be solved analytically. Therefore, the averaging method is used to investigate its response. Experimental results are compared with the analytical solution to validate it. The results show that the existence of the nonlinearity in the system enables harvesting at low frequencies, increase the bandwidth, and enhances the output power significantly.

  6. Horizontal Directional Drilling (HDD) for shore approach applications

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Neil [MGI do Brasil Ltda., Rio de Janeiro, RJ (Brazil)

    2003-07-01

    Horizontal directional drilling (HDD) has become a commonly used construction method for pipeline shore approaches. HDD can mitigate environmental impact, provide greater burial depths and minimize construction schedules. The risks that are associated with HDD river crossings, which are generally well recognized, also apply to HDD shore approaches where they are combined with specific risks occurring from working in the marine environment. The shore approach projects of The Bronx and Hunts Point provide good practical examples of the benefits of this technology in spite of the various challenges encountered. (author)

  7. Simple Model For Pressure Drop In Horizontal Core Annular Flow

    OpenAIRE

    Bannwart A.C.

    1999-01-01

    Based upon experimental data for heavy oil-water flow inside steel (26.7 mm ID) and cemented (23.9 mm ID) horizontal tubes, a very simple model for pressure drop in the core annular flow pattern was developed. The experiments were run at room temperature and the fluids used were a fuel oil (μ = 2.7 Pa.s, ρ = 989 kg/m3) and tap water, both drawn from a separator tank. First, it is shown that for both tubes the so-called 'perfect core annular flow' approach (shortly PCAF) poorly correlates the ...

  8. Effect of occlusion, directionality and age on horizontal localization

    Science.gov (United States)

    Alworth, Lynzee Nicole

    Localization acuity of a given listener is dependent upon the ability discriminate between interaural time and level disparities. Interaural time differences are encoded by low frequency information whereas interaural level differences are encoded by high frequency information. Much research has examined effects of hearing aid microphone technologies and occlusion separately and prior studies have not evaluated age as a factor in localization acuity. Open-fit hearing instruments provide new earmold technologies and varying microphone capabilities; however, these instruments have yet to be evaluated with regard to horizontal localization acuity. Thus, the purpose of this study is to examine the effects of microphone configuration, type of dome in open-fit hearing instruments, and age on the horizontal localization ability of a given listener. Thirty adults participated in this study and were grouped based upon hearing sensitivity and age (young normal hearing, >50 years normal hearing, >50 hearing impaired). Each normal hearing participant completed one localization experiment (unaided/unamplified) where they listened to the stimulus "Baseball" and selected the point of origin. Hearing impaired listeners were fit with the same two receiver-in-the-ear hearing aids and same dome types, thus controlling for microphone technologies, type of dome, and fitting between trials. Hearing impaired listeners completed a total of 7 localization experiments (unaided/unamplified; open dome: omnidirectional, adaptive directional, fixed directional; micromold: omnidirectional, adaptive directional, fixed directional). Overall, results of this study indicate that age significantly affects horizontal localization ability as younger adult listeners with normal hearing made significantly fewer localization errors than older adult listeners with normal hearing. Also, results revealed a significant difference in performance between dome type; however, upon further examination was not

  9. Chemical placement in heterogeneous and long reach horizontal wells

    Energy Technology Data Exchange (ETDEWEB)

    Stalker, Robert; Wahid, Fazrie; Graham, Gordon M.

    2006-03-15

    The effective placement of chemical squeeze treatments in heterogeneous wells and long reach horizontal wells has proved a significant challenge, with various factors including heterogeneity, crossflow and pressure gradients between otherwise non-communicating zones within the well, all contributing to an uneven placement of the scale squeeze treatment into the reservoir. Current methods to circumvent these problems often rely on extremely expensive coiled tubing operations, staged diversion (temporary shut off) treatments or by designing treatments to deliberately overdose some zones in order to gain placement in other (e.g. low permeability) zones. Moreover for deepwater sub sea horizontal wells the costs associated with ''spot'' treating along the length of horizontal wells by coil tubing tractor operations can often be prohibitively expensive. For other very near well bore treatments such as acid stimulation a number of self diverting strategies including gelled acid treatments, staged viscoelastic surfactant treatments and foams have been applied in field treatments with some success. However the properties which make such treatments applicable for acid stimulation may also make them inappropriate for bullhead scale squeeze treatments. Recent work by the current authors has however indicated the possible benefits of using modified injection fluids to aid uniform scale inhibitor placement in such wells in order to effect more even placement. In summary this paper will describe the various options available for achieving self diversion and describes the potential drawbacks associated with the viscous placement fluids commonly used for acid simulation techniques. In addition, various simulation packages commonly used for scale related calculations are reviewed and their limitations, primarily due to the inherent assumptions made and input parameters used, for modelling squeeze treatments using such modified fluids are described. The paper

  10. Reparacion espontánea de fractura radicular horizontal

    Directory of Open Access Journals (Sweden)

    Jorge Elias Dancur Turizo

    2013-10-01

    Full Text Available Resumen Se reporta un caso clínico de una fractura radicular horizontal en un central superior izquierdo, que reparó espontáneamente sin tratamiento dental alguno. La fractura se diagnosticó catorce años después de recibir el trauma, en un examen radiográfico rutinario de la consulta endodóntica, ya que el diente sin ninguna sintomatología presentaba al examen clínico cambio de color y al examen radiográfico se observaba zona radiolúcida en la zona apical, por lo que fue remitida del posgrado de ortodoncia al posgrado de endodoncia de la facultad de odontología de la Universidad de Cartagena. Al examen radiográfico realizado en el posgrado de endodoncia se observa línea de fractura radicular horizontal a nivel de la unión del tercio cervical con el tercio medio de la raíz y además se encuentra un defecto óseo al mismo nivel de la fractura radicular. Se realiza el tratamiento de conducto radicular sin complicación alguna. Este caso es sorprendente por realizarse una reparación espontánea sin tratamiento odontológico alguno y más aún sin emitirse un diagnóstico de fractura radicular con anterioridad. (DUAZARY 2010, 79 - 83AbstractIs reported a clinical case of a horizontal root fracture in a maxillary left central incisor that was spontaneously repaired without any dental treatment is reported. The root fracture was diagnosed in an x-ray endodontic examination routine fourteen years after receiving the trauma due to changes in the color of the tooth and asymptomatic, x-ray examination showed a radiolucent zone apically, reason why the patient was sent from orthodontic service to endodontic service at Dentistry School of Cartagena University. Radiographs examination showed a line of horizontal fracture between the union of the cervical third with the middle third and in addition there is a bone defect at the same level of the root fracture. Root canal treatment is done without any complication. This case is surprising

  11. Ecological networks to unravel the routes to horizontal transposon transfers.

    Science.gov (United States)

    Venner, Samuel; Miele, Vincent; Terzian, Christophe; Biémont, Christian; Daubin, Vincent; Feschotte, Cédric; Pontier, Dominique

    2017-02-01

    Transposable elements (TEs) represent the single largest component of numerous eukaryotic genomes, and their activity and dispersal constitute an important force fostering evolutionary innovation. The horizontal transfer of TEs (HTT) between eukaryotic species is a common and widespread phenomenon that has had a profound impact on TE dynamics and, consequently, on the evolutionary trajectory of many species' lineages. However, the mechanisms promoting HTT remain largely unknown. In this article, we argue that network theory combined with functional ecology provides a robust conceptual framework and tools to delineate how complex interactions between diverse organisms may act in synergy to promote HTTs.

  12. Ecological networks to unravel the routes to horizontal transposon transfers.

    Directory of Open Access Journals (Sweden)

    Samuel Venner

    2017-02-01

    Full Text Available Transposable elements (TEs represent the single largest component of numerous eukaryotic genomes, and their activity and dispersal constitute an important force fostering evolutionary innovation. The horizontal transfer of TEs (HTT between eukaryotic species is a common and widespread phenomenon that has had a profound impact on TE dynamics and, consequently, on the evolutionary trajectory of many species' lineages. However, the mechanisms promoting HTT remain largely unknown. In this article, we argue that network theory combined with functional ecology provides a robust conceptual framework and tools to delineate how complex interactions between diverse organisms may act in synergy to promote HTTs.

  13. Ridge Splitting Technique for Horizontal Augmentation and Immediate Implant Placement

    Directory of Open Access Journals (Sweden)

    Papathanasiou Ioannis

    2014-03-01

    Full Text Available Insufficient width of the alveolar ridge often prevents ideal implant placement. Guided bone regeneration, bone grafting, alveolar ridge splitting and combinations of these techniques are used for the lateral augmentation of the alveolar ridge. Ridge splitting is a minimally invasive technique indicated for alveolar ridges with adequate height, which enables immediate implant placement and eliminates morbidity and overall treatment time. The classical approach of the technique involves splitting the alveolar ridge into 2 parts with use of ostetomes and chisels. Modifications of this technique include the use of rotating instrument, screw spreaders, horizontal spreaders and ultrasonic device.

  14. Campus Sewage Treatment in Multilayer Horizontal Subsurface Flow Constructed Wetlands

    DEFF Research Database (Denmark)

    Bai, Shaoyuan; Lyu, Tao; Ding, Yanli

    2017-01-01

    Horizontal subsurface flow constructed wetlands (HSCWs) are widely use for wastewater treatment. The objective of this study is to assess the effects of substrate-size selection and layout optimization on pollutant removal and microbial-community-distribution responses in HSCWs. Three pilot......-scale constructed wetlands (CWs) are established at Guilin University of Technology, China, to treat campus sewage. The three CWs include monolayer (CW1), three-layer (CW2), and six-layer (CW3) substrate structures with the hydraulic conductivity of the substrate increasing from the surface to the bottom...

  15. Inequidad horizontal en el IRPF dual español

    OpenAIRE

    Carlos Díaz Caro; Jorge Onrubia Fernández

    2014-01-01

    El objetivo de este trabajo es analizar los efectos provocados por la implantación de un modelo dual de gravamen sobre la renta de las personas físicas en España sobre la equidad horizontal. Para ello utilizaremos el Panel de Declarantes de IRPF IEF-AEAT para los ejercicios fiscales previo y posterior a la reforma 2006-2007. El análisis empírico se lleva a cabo utilizando las funciones cópulas que permiten obtener una medida de dependencia y asociación, a partir de la renta antes y después de...

  16. Horizontal gene transfer in the acquisition of novel traits by metazoans.

    Science.gov (United States)

    Boto, Luis

    2014-02-22

    Horizontal gene transfer is accepted as an important evolutionary force modulating the evolution of prokaryote genomes. However, it is thought that horizontal gene transfer plays only a minor role in metazoan evolution. In this paper, I critically review the rising evidence on horizontally transferred genes and on the acquisition of novel traits in metazoans. In particular, I discuss suspected examples in sponges, cnidarians, rotifers, nematodes, molluscs and arthropods which suggest that horizontal gene transfer in metazoans is not simply a curiosity. In addition, I stress the scarcity of studies in vertebrates and other animal groups and the importance of forthcoming studies to understand the importance and extent of horizontal gene transfer in animals.

  17. Transport measurements of lateral MgB{sub 2}/Fe/MgB{sub 2} junctions

    Energy Technology Data Exchange (ETDEWEB)

    Fabretti, Savio; Thomas, Patrick; Schaefers, Markus; Schebaum, Oliver; Thomas, Andy [Bielefeld University (Germany)

    2012-07-01

    We fabricated MgB{sub 2}/Fe/MgB{sub 2} lateral junctions by rf-dc co-sputtering. The MgB{sub 2} films have a thickness of about 30nm and a critical temperature of up to 33 K. The samples were annealed in-situ between 450 C and 750 C. Our MgB{sub 2} films were sputtered on different substrates such as (100)MgO and r-cut sapphire. Their crystalline structure and magnetic anisotropy were investigated. For transport measurement a thin iron cross strip of about 30 nm was placed between the MgB{sub 2} strip. The MgB{sub 2} strip was relieved by a groove of about 5 {mu}m. The superconductivity of MgB{sub 2} is suppressed due to the proximity effect near the junction area and builds a natural metallic barrier. With this configuration, we get a magnetoresistance due to the domain wall scattering in iron where the magnetoresistance was measured perpendicular and in plane of this array. Further, we investigated their I-V and dI/dV characteristics in dependence of an applied magnetic field up to 4T. The {sigma} gap as well as the {pi} gap was observed.

  18. Respiratory outcomes following 100 mg/kg v. 200 mg/kg of poractant ...

    African Journals Online (AJOL)

    Background. e treatment guideline for the management of respiratory distress syndrome in the newborn unit at Auckland City Hospital (ACH), Auckland, New Zealand, was amended in July 2010. In keeping with current evidence, the initial dose of poractant alpha was increased from 100 mg/kg to 200 mg/kg. e outcomes of ...

  19. Preliminary study of the characteristics of a high Mg containing Al-Mg-Si alloy

    Science.gov (United States)

    Yan, F.; McKay, B. J.; Fan, Z.; Chen, M. F.

    2012-01-01

    An Al-20Mg-4Si high Mg containing alloy has been produced and its characteristics investigated. The as-cast alloy revealed primary Mg2Si particles evenly distributed throughout an α-Al matrix with a β-Al3Mg2 fully divorced eutectic phase observed in interdendritic regions. The Mg2Si particles displayed octahedral, truncated octahedral, and hopper morphologies. Additions of Sb, Ti and Zr had a refining influence reducing the size of the Mg2Si from 52 ± 4 μm to 25 ± 0.1 μm, 35 ± 1 μm and 34 ± 1 μm respectively. HPDC tensile test samples could be produced with a 0.6 wt.% Mn addition which prevented die soldering. Solution heating for 1 hr was found to dissolve the majority of the Al3Mg2 eutectic phase with no evidence of any effect on the primary Mg2Si. Preliminary results indicate that the heat treatment has a beneficial effect on the elongation and the UTS.

  20. Las Rocas Nos Cuentan (Rocks Tell Their Stories)

    Science.gov (United States)

    Llerandi-Roman, Pablo A.

    2012-01-01

    Many Earth science lessons today still focus on memorizing the names of rocks and minerals. This led the author to develop a lesson that reveals the fascinating stories told by rocks through the study of their physical properties. He first designed the lesson for Puerto Rican teachers, hence its Spanish title: "Las Rocas Nos Cuentan Su Historia."…