501 research outputs found

    Medidas preventivas para convívio com as principais doenças fúngicas da goiabeira no Rio Grande do Sul.

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    Thermal Correlators in Holographic Models with Lifshitz scaling

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    We study finite temperature effects in two distinct holographic models that exhibit Lifshitz scaling, looking to identify model independent features in the dual strong coupling physics. We consider the thermodynamics of black branes and find different low-temperature behavior of the specific heat. Deformation away from criticality leads to non-trivial temperature dependence of correlation functions and we study how the characteristic length scale in the two point function of scalar operators varies as a function of temperature and deformation parameters.Comment: 28 pages, 8 figures; typos corrected, references added, published versio

    Radiation Campaign of HPK Prototype LGAD sensors for the High-Granularity Timing Detector (HGTD)

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    We report on the results of a radiation campaign with neutrons and protons of Low Gain Avalanche Detectors (LGAD) produced by Hamamatsu (HPK) as prototypes for the High-Granularity Timing Detector (HGTD) in ATLAS. Sensors with an active thickness of 50~μ\mum were irradiated in steps of roughly 2×\times up to a fluence of 3×1015 neqcm−23\times10^{15}~\mathrm{n_{eq}cm^{-2}}. As a function of the fluence, the collected charge and time resolution of the irradiated sensors will be reported for operation at −30∘-30^{\circ}

    Eco-friendly fungicide based on chitosan and pecan nut oil: development and evaluation in anthracnose control.

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    Industrial processing of pecan nuts results in edible oil ? with fractions of fatty acids, polyphenols and phytosterols - that may be used for managing phytopathogens. Besides, chitosan may interfere with pathogen development directly and/or activate mechanisms of defense in plant tissues. This study aimed at developing a novel, natural and eco-friendly fungicide based on pecan nut oil immobilized in chitosan and at evaluating its activity against Colletotrichum gloeosporioides, an agent of anthracnose in guava trees and other fruit trees. Changes in the immobilized material exhibited at bands were identified by infrared spectroscopy. Additionally, micrographs by scanning electron microscopy (SEM) showed efficient changes in the immobilized material, by comparison with the polymer chitosan. Decreases in Colletotrichum gloeosporioides sporulation in vitro were 37% in the case of pecan nut oil immobilized in chitosan (IO) and 39% in the case of non-immobilized pecan nut oil (NIO). These results are positive because this fungus produces a large number of spores which may disseminate and survive on surfaces of plant tissues infected by anthracnose. Immobilization of pecan oil in chitosan showed benefits in the synthesis of a novel, stable and eco-friendly material which may be applied to guava trees to control anthracnose
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