392 research outputs found
Impacts of climate changes on risk zoning for cowpea in the Amazonian tropical conditions
The climate risk zoning was carried out for cowpea cultivated in northeastern Amazonia, Pará state, Brazil. Système d’Analyse
Régionale des Risques Agroclimatologiques (SARRA) crop model was used and calibrated from data obtained in field experiments
conducted between 2013 and 2016 in Castanhal, state of Pará. Low climate risk areas were defined as those with water requirement
satisfaction index (WRSI) greater than or equal to 0.5 during flowering and early grain development and less than 20 mm of total rainfall
during grain maturation and harvest for at least 80% of the simulated sowings of the crop. Simulations of the current and future climate
conditions were carried out with the regional climate modelling system version 4 (RegCM4) nested with the HadGEM2 global circulation
model with RCP 4.5 IPCC-AR4 scenario. The results show that climate changes are likely to reduce the duration of the optimal period for
sowing cowpea in the mentioned regioninfo:eu-repo/semantics/publishedVersio
Influence of normal and radial contributions of local current density on local electrochemical impedance spectroscopy.
A new tri-electrode probe is presented and applied to local electrochemical impedance spectroscopy (LEIS) measurements. As opposed to two-probe systems, the three-probe one allows measurement not only of normal, but also of radial contributions of local current densities to the local impedance values. The results concerning the cases of the blocking electrode and the electrode with faradaic reaction are discussed from the theoretical point of view for a disk electrode. Numerical simulations and experimental results are compared for the case of the ferri/ferrocyanide electrode reaction at the Pt working electrode disk. At the centre of the disk, the impedance taking into account both normal and radial contributions was in good agreement with the local impedance measured in terms of only the normal contribution. At the periphery of the electrode, the impedance taking into account both normal and radial contributions differed significantly from the local impedance measured in terms of only the normal contribution. The radial impedance results at the periphery of the electrode are in good agreement with the usual explanation that the associated larger current density is attributed to the geometry of the electrode, which exhibits a greater accessibility at the electrode edge
Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS):II. A broadened sodium feature on the ultra-hot giant WASP-76b
Phytophilous caridean shrimps (Atyidae and Palaemonidae) in Salsa river (Canavieiras, Bahia, Brazil)
Influence of scrotal bipartition on spermatogenesis yield and sertoli cell efficiency in sheep
Comportamento de genótipos de cenoura para verão em localidades com diferentes etiologias da queima-das-folhas
Reproductive aspects of Macrobrachium amazonicum (Decapoda: Palaemonidae) in the State of Amapá, Amazon River mouth
Uso de técnicas estatísticas para modelar a resistência à flexão de corpos cerâmicos contendo resíduo de granito
Modificações no atendimento de enfermagem hospitalar decorrentes do Sistema Único de Saúde (SUS)
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