4,770 research outputs found

    Effects of the size and concentration of depleting agents on the stabilization of the double-helix structure and DNA condensation: a single molecule force spectroscopy study

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    We perform a single molecule force spectroscopy study to characterize the role of the size (molecular weight) and concentration of depleting agents on DNA condensation and on the stabilization of the double-helix structure, showing that important features such as the threshold concentration for DNA condensation, the force in which the melting plateau occurs and its average length strongly depend on the depletant size chosen. Such results are potentially important to understand how the presence of surrounding macromolecules influences DNA stabilization inside living cells and therefore advance in the understanding of the crowded cell environment on DNA-related functions

    Custo de produção da banana em Buritis, Rondônia, 2007.

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    Este trabalho busca determinar o custo de produção de banana em um sistema tecnificado preconizado pela pesquisa e extensão rural para o estado de Rondônia. Para o sistema estão previstos preparo de área, calagem, adubação de plantio e produção. As mudas devem ser de procedência idônea e os frutos são comercializados despencados, em caixas. É um sistema mais intensivo em capital e tecnologia que a maioria dos sistemas implantados atualmente no estado.bitstream/CPAF-RO-2009-09/12191/1/cot322_bananaemburitis.pd

    Monte Carlo Simulations of Some Dynamical Aspects of Drop Formation

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    In this work we present some results from computer simulations of dynamical aspects of drop formation in a leaky faucet. Our results, which agree very well with the experiments, suggest that only a few elements, at the microscopic level, would be necessary to describe the most important features of the system. We were able to set all parameters of the model in terms of real ones. This is an additional advantage with respect to previous theoretical works.Comment: 7 pages (Latex), 6 figures (PS) Accepted to publication in Int. J. Mod. Phys. C Source Codes at http://www.if.uff.br/~arlim

    Multiplicação do porta-enxerto trifoliata por meio de estacas maduras.

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    bitstream/item/47090/1/comunicado-256.pd

    Estruturação de sistema de LEDs em laboratório de cultura de tecidos.

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    bitstream/item/61630/1/Circular-121-J.pd

    Tecnologia para produção de mudas orgânicas de citros.

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    bitstream/item/79723/1/comunicado-263.pd

    Cultivares de laranjeira resistentes ao cangro citrico.

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    bitstream/CPACT-2009-09/12047/1/documento_249.pd
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