992 resultados para Lewisohn, Ludwig, 1882-1955.


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O gênero Xeropigo O. Pickard-Cambridge é revisado, com a proposição de sete espécies novas neotropicais.: X. candango, com base em machos e fêmeas de Brasília, Distrito Federal e Goiás, Brasil; X. rheánsae, com base em machos de Goiás, Brasil; X. camilae, com base em machos e fêmeas do norte e centro-oeste do Brasil; X. cotijuba, com base em machos e fêmeas do norte e centro-oeste do Brasil; X. pachitea, machos e fêmeas de Huánuco e Cajamarca, Peru; X. perene, com base em fêmeas de Junin e Loreto, Peru; X. brescoviti com base em machos de Beni, Bolívia. As espécies anteriormente conhecidas, X. tridentiger (O. Pickard-Cambridge, 1869), espécie-tipo, descrita da ilha de Santa Helena, mas também registrada nas Américas do sul e Central e X. sinedigaari (Caporiacco, 1955), do norte da Venezuela e Trinidad, são rediagnosticadas sendo fornecidos novos registras e ilustrações de X. tridentiger. Uma chave dicotômica para todas as nove espécies conhecidas, bem como um mapa de distribuição georreferenciado para as espécies aqui propostas são também fornecidos.

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O presente estudo descreve a dieta da espécie Hemigrammus belottii (Characiformes: Characidae) coletados na bacia do Rio Urucu no município de Coari, Amazonas, (Brasil), buscando responder o seguinte questionamento: Qual a influência dos períodos hidrológicos (seco e chuvoso) e da distribuição espacial na dieta de H. belottii? Os espécimes tiveram seus estômagos retirados e os itens alimentares pesados e identificados para posteriores análises relacionadas à intensidade alimentar, pelo Índice de Repleção (IR%) e pelo índice de importância alimentar (IAi%). Foi analisado um total de 227 espécimes, com comprimento padrão médio de 16,54 mm ± 5,6 mm. Baseado no IR% verificou-se para H. belottii uma maior intensidade alimentar durante o período da seca. A dieta da espécie foi composta predominantemente pelos itens Formicidae (IAi% = 69,6), fragmento de exoesqueleto alóctone (IAi% = 17,7) e Coleoptera (IAi% = 6,0), com sua composição se mostrando independente de períodos hidrológicos e de sua distribuição espacial, que pode ser atribuído à alta disponibilidade de itens alimentares utilizados pela espécie durante o ano todo. De um modo geral H. belottii evidenciou um hábito alimentar insetívoro generalista, com predomínio de itens de origem alóctone.

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Neste estudo, padrões de tamanho do corpo de Phanocerus clavicornis Sharp, 1882 (Coleoptera: Elmidae: Larainae) foram investigados ao longo de um gradiente de variação de velocidade da corrente em córregos de baixa ordem da Mata Atlântica. Especificamente, buscou-se testar a hipótese de que a distribuição de larvas de P. clavicornis com diferentes tamanhos corpóreos respondem às variações na velocidade da corrente em córregos. As coletas das larvas foram realizadas com um amostrador de Surber durante dois períodos amostrais, definidos pelo regime de chuvas: agosto - estação seca e fevereiro - estação chuvosa. Possíveis diferenças nas medidas de tamanho do corpo foram testadas através de uma análise de variância (ANOVA). Os resultados daANOVAindicaram para todas as medidas das larvas coletadas nos córregos de primeira ordem (largura da cabeça, largura do protórax e comprimento total do corpo) encontramos diferenças significativas, indicando uma variação morfométrica com as mudanças das condições hidráulicas, onde as larvas menores foram associadas aos períodos de maior precipitação. No entanto, em córregos maiores (3a ordem), os eventos de chuva tiveram menor impacto no tamanho dos indivíduos, com a ocorrência de larvas com diferentes tamanhos. Os resultados deste estudo sugerem que os espaços intersticiais são importantes para a proteção das larvas contra a velocidade da corrente e que as populações de P. clavicornis possuem alta plasticidade, sendo uma característica fundamental para a ocupação desta espécie em ambientes instáveis. Esses resultados são importantes para a compreensão da história de vida e características comportamentais da espécie, que permitem persistir em córregos ao longo de gradiente de perturbação do fluxo.

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Background: Immunity plays an important role in controlling human papillomavirus (HPV) infection and associated lesions. Unlike infections caused by other viruses, natural HPV infection does not always result in a protective antibody response. Therefore, HPV antibodies are also considered markers of cumulative exposure. The aim of this study was to identify determinants of HPV16 seroreactivity at enrollment among women from the Ludwig-McGill cohort, a natural history study of HPV infection and risk of cervical neoplasia.Methods: HPV16 serology was assessed by ELISA for L1 and L2 capsid antigens, while HPV typing and viral load measurements were performed by PCR-based methods. The associations were analyzed by unconditional logistic regression.Results: Of 2049 subjects, 425 (20.7%) were strongly seropositive for HPV16. In multivariate analysis, seroreactivity was positively correlated with age, lifetime number of sexual partners, frequency of sex, and HPV16 viral load, and negatively associated with duration of smoking.Conclusions: HPV16 seroreactivity is determined by factors that reflect viral exposure.

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This article presents the historical trajectory of agricultural technical education in the State of São Paulo, 1882-2001, with emphasis on regulatory and policy aspects of transition management agencies and disruption in the construction and consolidation of a pedagogical and curricular design of this area of teaching technical and institutional policies of these technical schools. Thus focuses on the major changes in the political-normative and pedagogical and organizational character that shaped the construction of its especificidade.Isto because it is necessary to know the history of technical education 'agricultural' (agricultural area) in order to support the analysis of its configuration current and devise new prospects for your gestão.O Paulista agricultural education was subject to constant political uncertainties as to its principles and fins.As several transfers and reallocations it has undergone through different State Secretariats, reveal political barriers regarding its management and the difficulty of situating it in an appropriate and befitting their purposes locus.

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This article aims to analyses the anti-Communism in the period between 1955 and 1958 in Londrina, Paraná, from the event march of Production which was reported by Folha de Londrina in 1958. We’ll use as methodological the discourse analysis of French substantiated in studies of Pêcheux (1997) and the mechanisms for structuring of antiCommunism discourse of Catholic Londrina leaders from the 1950s. Starting on survey of documentary sources and bibliographical, specially texts produced by representatives of Catholic church in Northern Paraná during the period of proposed analysis. We intend to analyse Catholic anti-Communism from point of view of its elements. The complexity of the political historical period of reference of this article shows how about communism in Folha de Londrina is linked to a discourse on other prebuilt discourses. This article is built in three steps: the first one is JK Years: Anti-Communism while legitimizing the development policy that we will produce an analysis of JK government that stood against to communism while conception of society and economic and political structures. The second one is the multifaceted anti-Communism in Brazil. We focus on the theoretical discussion on the concept of anti-Communism pointing out many Brazilian facets interpretation. The last one , faith and power: Anti-Communism sense and Catholic church in Londrina (1955-1958) will systematize texts of Catholic leaders about communism and finally analyze them with the proposed theoretical framework of discourse analysis.

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Pós-graduação em Ciências Sociais - FCLAR

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Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq)

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This paper is part of a broader investigation on Epistemology of Biology carried out by a group of researchers from Cascavel/PR. It involves studies and research about biological thought on subjects such as the growing of the concepts of gene, genotype and phenotype. The aim of this research was to gather the undergraduate students of Biological Sciences’ views about the role played by the inclusion of a historical episode in the study group as a trigger for epistemological discussions and didactic reflections. Firstly, the students received Johannsen’s article “The genotype conception of heredity”, published in 1911 in the journal The American Naturalist, in which he proposed the concepts of genotype and phenotype, among other ones. After, there was a discussion held by group about the concepts proposed in the article taking into account the epistemological, historical and didactic aspects. Data collection occurred through the recording of the group discussions and individual interviews. The results suggest that the inclusion of this historical episode, enabled the participants to develop critical thinking through collective reflection on the meaning of biological knowledge in different contexts.

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This paper aims an epistemologically analysis of the attempt of James Prescott Joule to replace the steam engine by the electric one. In this historical analysis, we use the epistemological categories: style of thinking, collective thinking, intercollective circulation of ideas and practices,Joule and other technicians in Machester received in that time financial incentives from governments and industry to replace the steam engine by the electric one, since it was in Manchester a culture of the technique of the accuracy and precision in which Joule was immersed, which allowed us to initially identify the styles of techniques thinking and experimental efficiency. However, Joule could not replace the steam engine by the electric; and the awareness of the problems faced by him, in the attempt to make such a substitution, led him to seek, through an intercollective circulation of ideas and practices, such as the studies of Faraday and Jacobi, a change of direction in his researches. According to our analysis, what happened was a change of style from a technical to a scientific thinking. In this sense, Joule began to investigate issues of a scientific nature, as the Joule’s effect and the mechanical equivalent of heat, which contributed significantly to the establishment of the principle of conservation of energy. We present here the contributions of this epistemological analysis to the discussion of questions of the nature of science in the basic education and for the training of physics teachers.