5,499 research outputs found

    Multiple exophytic osteomas of craniofacial bones not associated with Gardner s Syndrome: a case report

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    Exophytic osteomas are mature bone protuberances required to be carefully differentiated from other lesions. The authors present a male, 44 year-old patient s report presenting multiple exophytic osteomas located in both sides of the vestibulomaxillary, premolar and molar regions not-associated with Gardner s Syndrome.Osteomas exofíticos são protuberâncias de osso maduro que necessitam ser cuidadosamente diferenciados de outras lesões. Os autores apresentam relato de paciente do sexo masculino, com 44 anos de idade, apresentando osteomas exofíticos múltiplos localizados na região vestíbulo-maxilar em ambos os lados, região de pré-molares e molares não associados à Síndrome de Gardner.UNIFESP-EPMUNIFESP, EPMSciEL

    Synthesis, structure and physical properties of luminescent Pr(III) ß-diketonate complexes

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    Near infrared lanthanide(III)-based light conversion molecular devices (LCMDs) are emerging as a promising class of materials for organic light-emitting diodes (OLEDs) in some niche technologies. Three of these molecular materials -two highly coordinated Pr3+ ß-diketonate monomers and a dimer- are presented and their structure and properties are discussed. Particular emphasis is placed on the solid-to-solid transformation observed for the homodinuclear compound

    Atividade de lipase em quimo de três espécies tropicais de peixes Teleostei de água doce

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    O objetivo do presente trabalho foi avaliar a atividade de lipase no quimo dos intestinos médio e posterior de três espécies de peixes Teleostei, com hábitos alimentares diferentes, piracanjuba (Brycon orbignyanus), piau (Leporinus friderici), onívoros, e surubim (Pseudoplatystoma curuscans), preferencialmente carnívoro, visando fornecer referência à nutrição para o ajuste de diferentes sistemas de alimentação artificial. Foram determinadas as atividades de lipase, utilizando-se kit BIOCLIN. Os resultados demonstraram atividade específica média de lipase de 99,86%, sendo menor para a piracanjuba (1,89 UI/mg) em relação ao piau (1347,82 UI/mg), ambos de hábito alimentar onívoro. A diferença de atividade específica de lipase entre piracanjuba e surubim (793,76 UI/mg) também apresentou média de 99,76%. O surubim apresentou atividade específica de lipase 41,11% menor que o piau. Estes dados sugerem que o piau apresenta atividade específica de lipase mais próxima à de um peixe carnívoro que onívoro. Estudos adicionais com testes de alimentação são necessários para a avaliação do comportamento destas espécies a novos sistemas de alimentação.The objective of this work was to evaluate the lipase activity in the chime present in the intestines or in the rectum of three tropical freshwater Teleostei species with different feeding habits: piracanjuba, Brycon orbignyanus (Valenciennes, 1849), piau, Leporinus friderici, omnivorous, and surubim (Pseudoplatystoma coruscans), preferably carnivorous, aiming to provide nutritional data for the adjustment of different artificial feeding systems. The lipase activity was thus determined by the use of BIOCLIN kit. The results showed average specific lipase activity of 99.86%, being lower for piracanjuba (1.89 UI/mg) as compared to piau (1347.82 UI/mg), both omnivorous, while the activity of the same enzyme for piracanjuba was 99.76% lower when compared to surubim (793.76 UI/mg). Surubim showed specific activity of 41.11% lower than of piau. This data suggests that piau presented specific lipase activity closely to carnivorous fish than the omnivorous one. Additional studies with feeding test are necessary to evaluate the behavior of these species under a new feeding systems

    Ancestral Origin of the ATTCT Repeat Expansion in Spinocerebellar Ataxia Type 10 (SCA10)

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    Spinocerebellar ataxia type 10 (SCA10) is an autosomal dominant neurodegenerative disease characterized by cerebellar ataxia and seizures. The disease is caused by a large ATTCT repeat expansion in the ATXN10 gene. The first families reported with SCA10 were of Mexican origin, but the disease was soon after described in Brazilian families of mixed Portuguese and Amerindian ancestry. The origin of the SCA10 expansion and a possible founder effect that would account for its geographical distribution have been the source of speculation over the last years. To unravel the mutational origin and spread of the SCA10 expansion, we performed an extensive haplotype study, using closely linked STR markers and intragenic SNPs, in families from Brazil and Mexico. Our results showed (1) a shared disease haplotype for all Brazilian and one of the Mexican families, and (2) closely-related haplotypes for the additional SCA10 Mexican families; (3) little or null genetic distance in small normal alleles of different repeat sizes, from the same SNP lineage, indicating that they are being originated by a single step mechanism; and (4) a shared haplotype for pure and interrupted expanded alleles, pointing to a gene conversion model for its generation. In conclusion, we show evidence for an ancestral common origin for SCA10 in Latin America, which might have arisen in an ancestral Amerindian population and later have been spread into the mixed populations of Mexico and Brazil

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W+μ+νW^+ \rightarrow \mu^+\nu and WμνW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

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    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

    Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

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    Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente
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