152 research outputs found
Radiolabeling of Cramoll 1,4: Evaluation of the Biodistribution
The cramoll 1,4 is a well-studied lectin. However, few studies about its biodistribution have been done before. In this study, we radiolabeled the cramol 1,4 with Tc-99m and analyzed the biodistribution. The results showed that the cramol has an abnormal uptake by the bowel with reflections on its clearance mechanism
MANEJO DE CRANIECTOMIA DESCOMPRESSIVA EM NEUROCIRURGIA PEDIÁTRICA
The aim of this article is to provide a comprehensive overview of pediatric decompressive craniectomy, covering from surgical decision-making to post-operative care and reintegration. The multidisciplinary analysis emphasizes the importance of monitoring, pain management, psychosocial support, and continuous education, aiming not only for surgical effectiveness but also the overall well-being of the child for a successful recovery. Methodology: This involves an integrative review with literature search in specialized databases such as PubMed and Scopus, using relevant terms related to decompressive craniectomy and pediatric neurosurgery, descriptors: "Craniectomy," "Decompressive Craniectomy," "Child Health," "Pediatric Care." Results: In the development, the article explores the phases of pediatric decompressive craniectomy, encompassing surgical decision-making, post-operative care, and reintegration. It emphasizes the importance of aspects such as monitoring, pain management, psychosocial support, and continuous education to promote a complete recovery. The integrative approach seeks a holistic understanding, considering both medical and emotional-social aspects. Conclusion: Pediatric decompressive craniectomy requires comprehensive care, including monitoring and emotional support. Successful reintegration is promoted through continuous guidance, covering home care and school adaptations. This approach aims for surgical effectiveness and overall well-being in recovery.O objetivo deste artigo é oferecer uma visão abrangente sobre a craniectomia descompressiva em crianças, abordando desde a decisão cirúrgica até os cuidados pós-operatórios e reintegração. A análise multidisciplinar destaca a importância da monitorização, manejo da dor, apoio psicossocial e educação contínua, visando não apenas a eficácia cirúrgica, mas também o bem-estar global da criança para uma recuperação bem-sucedida. Metodologia: Trata-se de uma revisão integrativa com a busca de literatura em bases de dados especializadas, como PubMed e Scopus, utilizando termos relevantes relacionados à craniectomia descompressiva e neurocirurgia pediátrica, os descritores: “Craniectomia”, “Craniectomia Descompressiva”, “Saúde da Criança”, “Cuidado Infantil”. Resultados: No desenvolvimento, o artigo explora as fases da craniectomia descompressiva pediátrica, abrangendo a decisão cirúrgica, cuidados pós-operatórios e reintegração. Destaca a importância de aspectos como monitorização, manejo da dor, apoio psicossocial e educação contínua para promover uma recuperação completa. A abordagem integrativa busca uma compreensão holística, considerando tanto os aspectos médicos quanto os emocionais e sociais. Conclusão: A craniectomia descompressiva em crianças demanda cuidados abrangentes, incluindo monitorização e suporte emocional. A reintegração bem-sucedida é promovida por meio de orientações contínuas, abrangendo cuidados em casa e adaptações escolares. Essa abordagem visa eficácia cirúrgica e bem-estar total na recuperação
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4
While the increasing availability of global databases on ecological communities has advanced our knowledge
of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In
the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of
Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus
crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced
environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian
Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by
2050. This means that unless we take immediate action, we will not be able to establish their current status,
much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio
Measuring the muon content of inclined air showers using AERA and the water-Cherenkov detector array of the Pierre Auger Observatory
Studies of the mass composition of cosmic rays and proton-proton interaction cross-sections at ultra-high energies with the Pierre Auger Observatory
In this work, we present an estimate of the cosmic-ray mass composition from the distributions of the depth of the shower maximum (Xmax) measured by the fluorescence detector of the Pierre Auger Observatory. We discuss the sensitivity of the mass composition measurements to the uncertainties in the properties of the hadronic interactions, particularly in the predictions of the particle interaction cross-sections. For this purpose, we adjust the fractions of cosmic-ray mass groups to fit the data with Xmax distributions from air shower simulations. We modify the proton-proton cross-sections at ultra-high energies, and the corresponding air shower simulations with rescaled nucleus-air cross-sections are obtained via Glauber theory. We compare the energy-dependent composition of ultra-high-energy cosmic rays obtained for the different extrapolations of the proton-proton cross-sections from low-energy accelerator data
Study of downward Terrestrial Gamma-ray Flashes with the surface detector of the Pierre Auger Observatory
The surface detector (SD) of the Pierre Auger Observatory, consisting of 1660 water-Cherenkov detectors (WCDs), covers 3000 km2 in the Argentinian pampa. Thanks to the high efficiency of WCDs in detecting gamma rays, it represents a unique instrument for studying downward Terrestrial Gamma-ray Flashes (TGFs) over a large area. Peculiar events, likely related to downward TGFs, were detected at the Auger Observatory. Their experimental signature and time evolution are very different from those of a shower produced by an ultrahigh-energy cosmic ray. They happen in coincidence with low thunderclouds and lightning, and their large deposited energy at the ground is compatible with that of a standard downward TGF with the source a few kilometers above the ground. A new trigger algorithm to increase the TGF-like event statistics was installed in the whole array. The study of the performance of the new trigger system during the lightning season is ongoing and will provide a handle to develop improved algorithms to implement in the Auger upgraded electronic boards. The available data sample, even if small, can give important clues about the TGF production models, in particular, the shape of WCD signals. Moreover, the SD allows us to observe more than one point in the TGF beam, providing information on the emission angle
The second knee in the cosmic ray spectrum observed with the surface detector of the Pierre Auger Observatory
Investigating multiple elves and halos above strong lightning with the fluorescence detectors of the Pierre Auger Observatory
ELVES are being studied since 2013 with the twenty-four FD Telescopes of the Pierre Auger Observatory, in the province of Mendoza (Argentina), the world’s largest facility for the study of ultra-high energy cosmic rays. This study exploits a dedicated trigger and extended readout. Since December 2020, this trigger has been extended to the three High levation Auger Telescopes (HEAT), which observe the night sky at elevation angles between 30 and 60 degrees, allowing a study of ELVES from closer lightning. The high time resolution of the Auger telescopes allows us to upgrade reconstruction algorithms and to do detailed studies on multiple ELVES. The origin of multiple elves can be studied by analyzing the time difference and the amplitude ratio between flashes and comparing them with the properties of radio signals detected by the ENTLN lightning network since 2018. A fraction of multi-ELVES can also be interpreted as halos following ELVES.
Halos are disc-shaped light transients emitted at 70-80 km altitudes, appearing at the center of the ELVES rings, due to the rearrangement of electric charges at the base of the ionosphere after a strong lightning event
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