Studying the nuclear mass composition of Ultra-High Energy Cosmic Rays with the Pierre Auger Observatory

The Fluorescence Detector of the Pierre Auger Observatory measures the atmospheric depth, $X_{max}$, where the longitudinal profile of the high energy air showers reaches its maximum. This is sensitive to the nuclear mass composition of the cosmic rays. Due to its hybrid design, the Pierre Auger Observatory also provides independent experimental observables obtained from the Surface Detector for the study of the nuclear mass composition. We present $X_{max}$-distributions and an update of the average and RMS values in different energy bins and compare them to the predictions for different nuclear masses of the primary particles and hadronic interaction models. We also present the results of the composition-sensitive parameters derived from the ground level component.Comment: Proceedings of the 12th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2011, Munich, German

Caracterização dos sistemas de produção de milho para altas produtividades.

bitstream/CNPMS-2010/22429/1/Circ-124.pd

Eficácia dos antibióticos: a perceção do usuário das regiões do Vale do Ave e de Aveiro

Os antibióticos são um grupo de drogas de extrema importância na luta contra inúmeras infeções. No entanto, a antibiótico-terapia em grande escala proporciona uma forte pressão seletiva sobre as bactérias, o que aumenta a incidência da resistência aos antibióticos e pode, a longo prazo, comprometer sua eficácia e utilidade. Uma das principais causas de resistência aos antibióticos é o tratamento inadequado.Este trabalho é financiado por: Fundos Europeus Estruturais e de Investimento, na sua componente FEDER, através do Programa Operacional Competitividade e Internacionalização (COMPETE 2020) [Projeto nº 006971 (UID/SOC/04011)]; e por Fundos Nacionais através da FCT – Fundação para a Ciência e a Tecnologia, no âmbito do projeto UID/SOC/04011/2013.info:eu-repo/semantics/publishedVersio

Insuficiencia hepática aguda asociada a enfermedades metabólicas hereditarias en ninos pequenos

INTRODUCTION: Pediatric acute liver failure (ALF) due to inherited metabolic diseases (IMD) is a rare life-threatening condition with a poor prognosis. Early intervention may be lifesaving. OBJECTIVE: To describe clinical presentation, investigation and outcomes of ALF related to IMD in young children. MATERIAL AND METHODS: Retrospective review of the medical records of children aged up to 24 months, admitted to a tertiary pediatric and neonatal Intensive Care Unit during a 27-year period, fulfilling the ALF criteria, with documented metabolic etiology. RESULTS: From 34 ALF cases, 18 were related to IMD: galactosemia (4), mitochondrial DNA depletion syndrome (MDS) (3), ornithine transcarbamilase deficiency (3), congenital defects of glycosylation (2), tyrosinemia type 1 (2), long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency (1), hereditary fructose intolerance (1), classic methylmalonic aciduria (1) and citrulinemia type 1 (1). The median age was 1.3 months. At least one previous suggestive sign/symptom of IMD (vomiting, failure to thrive, hypotonia or developmental delay) was observed in 67% of the cases. The most common physical signs at admission included: hepatomegaly (72%), jaundice (67%) and encephalopathy (44%). The peak laboratorial findings were: mean international normalizad ratio 4.5, median lactate 5mmol/L, mean bilirubin 201μmol/L, median alanine aminotransferase (ALT) 137 UI/L and median ammonia 177μmol/L. One patient was submitted to liver transplant in ALF context (MSD). The mortality rate was 44%. DISCUSSION: The identification of IMD as a frequent cause of ALF allowed specific therapeutic measures and adequate family counselling. Particular clinical features and moderated ALT and bilirubin levels can lead to its suspicion.info:eu-repo/semantics/publishedVersio

Observações fenológicas e de produção de Bertholletia excelsa Humb. & Bonpl., na comunidade Nossa Senhora do Rosário, Lago Máximo, Parintins, AM.

O objetivo do trabalho foi monitorar, por meio de observações periódicas quinzenais, a fase da fenologia reprodutiva de B. excelsa, e estimar a produção de um castanhal na comunidade de Nossa Senhora do Rosário, Lago do Máximo, Município de Parintins, AM

Mapeamento georreferenciado de uma população de Bertholletia excelsa (Humb. & Bonpl.), na comunidade de Nossa Senhora do Rosário, Lago do Máximo, Parintins, AM.

O objetivo do presente trabalho foi mapear e georreferenciar os indivíduos de uma população de B exelsa de um castanhal, localizado na Comunidade Nossa Senhora do Rosário, Lago do Máximo, Parintins-AM. Espera-se que este trabalho possa subsidiar o plano de manejo de produtos florestais não madeiros, valorizando a floresta em pé

Effect of low temperature nitriding of 100Cr6 substrates on TiN coatings deposited by IBAD

CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOIn this paper we studied the influence of pre-treating the surface of 100Cr6 steel by ion beam nitriding at low temperature (380 degrees C) on the surface topography and wear resistance of thin TiN coatings deposited by reactive ion beam assisted deposition. The specimens were characterized by grazing incidence X-ray diffraction, scanning electron microscopy and atomic force microscopy. The wear resistance of the TiN-coated specimens was evaluated by means of ball on disc tests. The results showed that application of a preliminary ion beam nitriding treatment slightly increased the surface roughness but improved the wear resistance of the 100Cr6 steel due to the formation of a diffusion zone containing the gamma'-Fe4N nitride combined with the TiN coating.In this paper we studied the influence of pre-treating the surface of 100Cr6 steel by ion beam nitriding at low temperature (380 degrees C) on the surface topography and wear resistance of thin TiN coatings deposited by reactive ion beam assisted deposition. The specimens were characterized by grazing incidence X-ray diffraction, scanning electron microscopy and atomic force microscopy. The wear resistance of the TiN-coated specimens was evaluated by means of ball on disc tests. The results showed that application of a preliminary ion beam nitriding treatment slightly increased the surface roughness but improved the wear resistance of the 100Cr6 steel due to the formation of a diffusion zone containing the gamma'-Fe4N nitride combined with the TiN coating.1815458CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOSem informaçãoThis work was supported by the NanoCom Network Project, 7th Framework Program – IRSES – Project Nr. 247524. SSV, FA and HP are CNPq fellows