95 research outputs found

    Uso Do 1-mcp E Atmosfera Modificada Na PĂłs-colheita De Atemoia 'gefner'

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    The scarcity of technologies related to the post-harvest physiology of this species is one of the barriers to commercialization of atemoya over long distances, aggravated by perishability presented by them. Thus, the objective of this study was to prolong the shelf life of atemoya fruits using 1-methylcyclopropene (1-MCP) and modified atmosphere by low-density polyethylene (LDP), associated with refrigeration. The experiment was conducted in a completely randomized design in a split-plot, with plots in the four doses of 1-MCP (0, 200, 400 and 600 ?L L-1), and in the 5 subplots evaluation periods after harvest in the range of 5 days, with four replicate. Atemoyas were harvested at physiological maturity then treated with doses of 1-MCP for 8 h at room temperature. Soon after, the fruits were placed in polystyrene trays. Some remained unpacked and others were packed with a plastic film of LDP 16 ÎĽm. The use of modified atmosphere and 1-MCP alone or combined, were effective in delaying the ripening of fruits, allowing the preservation of its chemistry quality. In the fruits treated with 1-MCP was no delay in the accumulation of soluble solids and starch degradation.112677

    Cárie pré-eruptiva: relato de caso

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    Reabsorções internas pré-eruptivas são lesões ocorridas em dentes ainda não erupcionados e observadas acidentalmente ou por apreciação de radiografias. As lesões são parecidas com as da cárie dentária e chamadas de cáries pré-eruptivas. Esta radiolucência em dentes inclusos possui resultados parecidos com os da cárie, mas como não estão expostas à flora microbiana oral são lesões idiopáticas, de desenvolvimento ou de provável reabsorção. Na literatura odontológica, o tema do estudo é limitado, mas são encontrados relatos de casos de pacientes com reabsorção coronária pré-eruptiva, que apresentaram difícil diagnóstico, necessitando de exames radiográficos como radiologia e tomografia. Os casos de reabsorção coronária pré-eruptiva embora ocorram em segundo e terceiro molares, são encontradas mais frequentemente nos pré-molares. Considerando a preocupação clínica, uma vez que essas lesões têm uma progressão silenciosa e, muitas vezes, não são detectadas por exames clínicos de rotina, torna-se necessárioo conhecimento da doença, para que o diagnóstico seja o mais precoce possível. Este trabalho objetiva relatar um caso de reabsorção coronária pré-eruptiva traçando suas semelhanças com dados da literatura

    On the mechanisms governing gas penetration into a tokamak plasma during a massive gas injection

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    A new 1D radial fluid code, IMAGINE, is used to simulate the penetration of gas into a tokamak plasma during a massive gas injection (MGI). The main result is that the gas is in general strongly braked as it reaches the plasma, due to mechanisms related to charge exchange and (to a smaller extent) recombination. As a result, only a fraction of the gas penetrates into the plasma. Also, a shock wave is created in the gas which propagates away from the plasma, braking and compressing the incoming gas. Simulation results are quantitatively consistent, at least in terms of orders of magnitude, with experimental data for a D 2 MGI into a JET Ohmic plasma. Simulations of MGI into the background plasma surrounding a runaway electron beam show that if the background electron density is too high, the gas may not penetrate, suggesting a possible explanation for the recent results of Reux et al in JET (2015 Nucl. Fusion 55 093013)

    Velocity-space sensitivity of the time-of-flight neutron spectrometer at JET

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    The velocity-space sensitivities of fast-ion diagnostics are often described by so-called weight functions. Recently, we formulated weight functions showing the velocity-space sensitivity of the often dominant beam-target part of neutron energy spectra. These weight functions for neutron emission spectrometry (NES) are independent of the particular NES diagnostic. Here we apply these NES weight functions to the time-of-flight spectrometer TOFOR at JET. By taking the instrumental response function of TOFOR into account, we calculate time-of-flight NES weight functions that enable us to directly determine the velocity-space sensitivity of a given part of a measured time-of-flight spectrum from TOFOR

    Relationship of edge localized mode burst times with divertor flux loop signal phase in JET

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    A phase relationship is identified between sequential edge localized modes (ELMs) occurrence times in a set of H-mode tokamak plasmas to the voltage measured in full flux azimuthal loops in the divertor region. We focus on plasmas in the Joint European Torus where a steady H-mode is sustained over several seconds, during which ELMs are observed in the Be II emission at the divertor. The ELMs analysed arise from intrinsic ELMing, in that there is no deliberate intent to control the ELMing process by external means. We use ELM timings derived from the Be II signal to perform direct time domain analysis of the full flux loop VLD2 and VLD3 signals, which provide a high cadence global measurement proportional to the voltage induced by changes in poloidal magnetic flux. Specifically, we examine how the time interval between pairs of successive ELMs is linked to the time-evolving phase of the full flux loop signals. Each ELM produces a clear early pulse in the full flux loop signals, whose peak time is used to condition our analysis. The arrival time of the following ELM, relative to this pulse, is found to fall into one of two categories: (i) prompt ELMs, which are directly paced by the initial response seen in the flux loop signals; and (ii) all other ELMs, which occur after the initial response of the full flux loop signals has decayed in amplitude. The times at which ELMs in category (ii) occur, relative to the first ELM of the pair, are clustered at times when the instantaneous phase of the full flux loop signal is close to its value at the time of the first ELM

    Chromosomal investigations in patients with mental retardation and/or congenital malformations

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    We investigated the chromosomal constitution of patients with mental retardation and/or congenital malformations in order to determine genetic causes for such disturbances. The GTG and CBG banding patterns were studied using phytohemagglutinin M-stimulated lymphocytes cultured from peripheral blood. Among 98 individuals with mental retardation and/or congenital malformations who were analyzed there were 12 cases of Down's syndrome, two of Edward's syndrome, one of Patau's syndrome, five of Turner's syndrome, two of Klinefelter's syndrome, one of "cri-du-chat" syndrome, one case of a balanced translocation between chromosomes 13 and 14, one case of a derivative chromosome and one of a marker chromosome. We found abnormal chromosomes in 26% of the patients, 82% of which were numerical abnormalities, with the remaining 18% being structural variants. We conclude that patients with mental retardation and/or congenital malformations should be routinely karyotyped

    Characterization of Phaeoacremonium isolates associated with Petri disease of table grape in Northeastern Brazil, with description of Phaeoacremonium nordesticola sp. nov.

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    This study aims to identify and characterize species of Phaeoacremonium associated with Petri disease of table grapes in three regions in the Northeastern Brazil, to investigate the distribution of the species in these regions and to evaluate their pathogenicity and aggressiveness in excised green shoots of table grapes. Fungal identifications were made using a combination of morphology together with a phylogenetic analysis based on portions of the β-tubulin (TUB2) and actin (ACT) genes. Three species of Phaeoacremonium (Pm.) were identified: Pm. minimum, Pm. nordesticola sp. nov. and Pm. parasiticum. Phaeoacremonium minimum and Pm. parasiticum had previously been reported in grapevine. Phaeoacremonium minimum was the most prevalent species. All species of Phaeoacremonium were pathogenic on detached shoots of table grape, with Pm. minimum being the most aggressive.This work was financed by Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco - FACEPE (APQ 137-5.01/12) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPES (Project 203/2009 - International Cooperation CAPES-Brazil/DGU-Spain). M. P. S. Câmara and S. J. Michereff are recipients of Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq research fellowships. D. Gramaje was supported by the DOC-INIA program from the National Institute for Agronomic Research (INIA), co-funded by the European Social Fund.Peer reviewe
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