52 research outputs found

    Imbuias multisseculares: Dendrocronologia e propriedades físico-anatômicas da madeira de Ocotea porosa

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    TCC(graduação) - Universidade Federal de Santa Catarina. Campus Curitibanos. Engenharia Florestal.Estudos sobre características da madeira de árvores multisseculares ao longo dos anéis de crescimento, como a imbuia, ainda são incipientes no Brasil. Desta forma, o objetivo do presente estudo foi avaliar a idade, densidade e a morfologia das fibras da madeira de árvores multisseculares da espécie imbuia (Ocotea porosa), provenientes de amostras de secções transversais de árvores > 1 m de diâmetro. As amostras são originárias de árvores mortas ocasionadas por eventos naturais (microexplosões) e corte ilegal. Dessas árvores, foram utilizados discos. Esses foram lixados para possibilitar a análise e contagem dos anéis de crescimento para estimativa da idade. A partir disto, retirou-se uma bagueta radial do disco, que foi marcada em porções a cada 10% no sentido medula-casca (0%=próximo à medula, 100%=próximo à casca), totalizando 11 amostras por árvore. Cada amostra foi submetida ao processo de maceração, visando a individualização das fibras para mensuração das dimensões de comprimento, largura, diâmetro do lúmen e espessura da parede celular, bem como dos indicadores anatômicos de fração parede, coeficiente de flexibilidade, índice de enfeltramento e índice de Runkel. Além disso, foram extraídas amostras dos discos para determinação da densidade básica e verde. Por meio do estudo dendrocronológico foi possível constatar que as árvores são multisseculares e de forma geral, conclui-se que a madeira de O. porosa apresenta boa homogeneidade para densidade e dimensões de suas fibras ao longo dos anos. Não foi observada diferença estatística para densidade básica para as três árvores de diferentes idades e que as dimensões das fibras e indicadores anatômicos não variaram de forma significativa no sentido radial (medula-casca). Tal homogeneidade é interessante do ponto de vista comercial ou de futuros plantios florestais, que mesmo árvores mais jovens poderão apresentar madeira de qualidade, com propriedades semelhantes a árvores mais velhas.Studies on wood characteristics of multi-secular trees along the growth rings, such as imbuia, are still incipient in Brazil. Thus, the aim of the present study was to evaluate the age, density and morphology of wood fibers from multi-secular trees of the imbuia species (Ocotea porosa), from samples of cross-sections of trees > 1 m in diameter. The samples come from dead trees caused by natural events (microexplosions) and illegal logging. From these trees, disks were used. These were sanded to enable analysis and counting of growth rings to estimate age. From this, a radial baguette was removed from the disk, which was marked in portions every 10% in the pith-bark direction (0%=near the pith, 100%=near the bark), totaling 11 samples per tree. Each sample was submitted to the maceration process, aiming at the individualization of the fibers to measure the dimensions of length, width, lumen diameter and cell wall thickness, as well as the anatomical indicators of wall fraction, flexibility coefficient, enfelting index and of Runkel. In addition, samples were extracted from the disks to determine the basic and green density. Through the dendrochronological study it was possible to verify that the trees are multi-secular and, in general, it is concluded that the wood of O. porosa presents good homogeneity for density and dimensions of its fibers over the years. No statistical difference was observed for basic density for the three trees of different ages and that the dimensions of the fibers and anatomical indicators did not vary significantly in the radial direction (bone marrow-bark). This homogeneity is interesting from the commercial point of view or from future forest plantations, that even trees younger trees may have quality wood, with properties similar to older trees

    Imbuia multissecular: caracterização morfológica das fibras da madeira de Ocotea porosa (Nees & Mart.) Barroso no sentido radial

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    The objective of the present study was to execute the morphological evaluation of the fibers of the imbuia wood (Ocotea porosa), along the growth layers of an ancient imbuia tree. The sample used was rescued in 2018 from an illegal cut and donated to UFSC by the Environmental Military Police of Santa Catarina state. A disc was removed at a height of 2.3 m, and the complete series of growth from pitch to bark was measured. The sample was dated with other living trees in its first 91 years by the collaborating researchers, they concluded that the sample had 533 years old in a 95 cm of ray. From this, a radial shape of the disc was removed, which was marked in portions every 10% in the pitch-bark direction (0% = close to the pitch, 100% = close to the bark), totaling 11 positions. Each sample was submitted to maceration process, aiming the individualization of the fibers to measure the dimensions of length, width, lumen diameter and wall thickness, as well as the anatomical indicators of wall fraction, flexibility coefficient, felting index and Runkel index. The tree showed an oscillating growth rate throughout its life, which was evidenced by the different number of rings in the sampled radial portions, indicating slower growth periods and others accelerated. The dimensions of the fibers and the anatomical indicators varied significantly in the radial direction (pitch-bark), with the exception of the lumen diameter and the felting index. Studies with ancient or old trees are rare, so such evaluations make it possible to know a little more about one of the most relevant species in southern Brazil.O objetivo do presente estudo foi realizar a avaliação morfológica das fibras da madeira de imbuia (Ocotea porosa) ao longo das camadas de crescimento de uma árvore multissecular. A amostra utilizada foi resgatada em 2018 de um corte ilegal e doada à UFSC pela Polícia Militar Ambiental de Santa Catarina. Foi retirado um disco a 2,3 m de altura, sendo medida a série completa de crescimento da medula à casca. A amostra foi datada com outras árvores vivas nos seus primeiros 91 anos por pesquisadores colaboradores que concluíram que esta apresenta 533 anos em um raio de 95 cm. A partir disso, retirou-se uma bagueta radial do disco, que foi marcada em porções a cada 10% no sentido medula-casca (0% = próximo à medula, 100% = próximo à casca), totalizando 11 posições. Cada uma dessas porções foi submetida ao processo de maceração, visando à individualização das fibras para mensuração das dimensões de comprimento, largura, diâmetro do lúmen e espessura da parede celular, bem como dos indicadores anatômicos de fração parede, coeficiente de flexibilidade, índice de enfeltramento e índice de Runkel. A árvore apresentou um ritmo de crescimento oscilante ao longo de sua vida, o que se constatou pelos diferentes números de anéis nas porções radiais amostradas, indicando períodos de crescimento mais lento e outros mais acelerados. As dimensões das fibras e os indicadores anatômicos variaram de forma significativa no sentido radial (medula-casca), com exceção do diâmetro do lúmen e do índice de enfeltramento. Estudos com árvores centenárias ou multisseculares são raros, assim, tais avaliações possibilitam conhecer um pouco mais sobre uma das espécies mais relevantes do sul do Brasil

    The first 62 AGN observed with SDSS-IV MaNGA - IV: gas excitation and star-formation rate distributions

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    We present maps of the ionized gas flux distributions, excitation, star-formation rate SFR, surface mass density ΣH+\Sigma_{H+}, and obtain total values of SFR and ionized gas masses {\it M} for 62 Active Galactic Nuclei (AGN) observed with SDSS-IV MaNGA and compare them with those of a control sample of 112 non-active galaxies. The most luminous AGN -- with L(\rm{[OIII]}\lambda 5007) \ge 3.8\times 10^{40}\,\mbox{erg}\,\mbox{s}^{-1}, and those hosted by earlier-type galaxies are dominated by Seyfert excitation within 0.2 effective radius ReR_e from the nucleus, surrounded by LINER excitation or transition regions, while the less luminous and hosted by later-type galaxies show equally frequent LINER and Seyfert excitation within 0.2Re0.2\,R_e. The extent RR of the region ionized by the AGN follows the relation RL([OIII])0.5R\propto\,L(\rm{[OIII]})^{0.5} -- as in the case of the Broad-Line Region. The SFR distribution over the region ionized by hot stars is similar for AGN and controls, while the integrated SFR -- in the range 1031010^{-3}-10\,M_\odot\,yr1^{-1} is also similar for the late-type sub-sample, but higher in the AGN for 75\% of the early-type sub-sample. We thus conclude that there is no signature of AGN quenching star formation in the body of the galaxy in our sample. We also find that 66\% of the AGN have higher ionized gas masses MM than the controls -- in the range 1053×107^5-3\times10^7\,M_\odot -- while 75\% of the AGN have higher ΣH+\Sigma_{H+} within 0.2Re0.2\,R_e than the control galaxies

    The 13th Data Release of the Sloan Digital Sky Survey : first spectroscopic data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

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    The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). As well as its core program, eBOSS contains two major subprograms: the Time Domain Spectroscopic Survey (TDSS) and the SPectroscopic IDentification of ERosita Sources (SPIDERS). This paper describes the first data release from SDSS-IV, Data Release 13 (DR13). DR13 makes publicly available the first 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA. It includes new observations from eBOSS, completing the Sloan Extended QUasar, Emission-line galaxy, Luminous red galaxy Survey (SEQUELS), which also targeted variability-selected objects and X-ray-selected objects. DR13 includes new reductions of the SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification, and new reductions of the SDSS-III APOGEE-1 data, improving stellar parameters for dwarf stars and cooler stars. DR13 provides more robust and precise photometric calibrations. Value-added target catalogs relevant for eBOSS, TDSS, and SPIDERS and an updated red-clump catalog for APOGEE are also available. This paper describes the location and format of the data and provides references to important technical papers. The SDSS web site, http://www.sdss.org, provides links to the data, tutorials, examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ∼6 yr operations of SDSS-IV

    The fourteenth data release of the Sloan Digital Sky Survey : first spectroscopic data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

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    The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014–2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as “The Cannon”; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V

    表紙 1

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    Objetivo: Verificar o conhecimento de pacientes em acompanhamento ambulatorial sobre a terapia com anticoagulantes orais. Métodos: Estudo de corte transversal com abordagem quantitativa, realizado no Pronto Socorro Cardiológico de Pernambuco (PROCAPE) com 100 indivíduos. Utilizou-se instrumento específico de 10 questões. Foram atribuídas pontuações às respostas, posteriormente classificadas como conhecimento insuficiente, conhecimento regular e conhecimento adequado, segundo ponto de corte. A pesquisa foi aprovada por Comitê de Ética em Pesquisa, CAAE nº30622114.2.0000.5192. Resultados: Apenas 39% dos indivíduos apresentaram conhecimento adequado sobre o tratamento. Houve significância estatística nas associações do conhecimento com sexo (p=0,042), idade (p= 0,015), anos de estudo (p=0,021) e tempo médio de acompanhamento ambulatorial (p=0,010). Conclusão: A predominância de conhecimento não adequado (61%) demonstram a necessidade de implementação de estratégias educativas que favoreçam a compreensão sobre o tratamento, estimulando a adesão farmacológica e reduzindo eventuais complicações.

    Fisioterapia e funcionalidade na doença de Huntington: Relato de caso / Physiotherapy and functionality in Huntington's disease: Case report

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    A doença de Huntington (DH) é uma afecção neurodegenerativa progressiva que leva a comprometimento cognitivo, comportamental e motor. A fisioterapia pode atuar não só nos cuidados paliativos, mas também na reabilitação através de tarefas funcionais relacionadas com as necessidades do dia a dia, visando promover mais funcionalidade para o paciente. Este estudo teve como objetivo relatar experiência da fisioterapia voltada para a funcionalidade em um paciente com DH. Trata-se de um relato de caso realizado de um paciente com DH atendido em uma clínica escola por três meses. Para avaliação do equilíbrio foi utilizada escala de Equilíbrio de Berg (EEB) e para mensurar a funcionalidade foi usada a Medida de Independência Funcional (MIF). Foi observado melhora no equilíbrio e na funcionalidade do paciente comparando o antes e após tratamento. Conclui-se que a atuação fisioterapêutica na DH apresenta um papel importante para manter os aspectos funcionais, melhorando assim a qualidade de vida desses pacientes. 

    O VIDEODOCUMENTÁRIO COMO REGISTRO DOS 30 ANOS DE TRABALHO DA LUMEN ET FIDES NO ATENDIMENTO DA PESSOA COM DEFICIÊNCIA

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    A presente pesquisa teve o objetivo de documentar o trabalho da Associação de Desenvolvimento de Crianças Limitadas - Lumen et Fides, que há 30 anos oferece tratamento na área de saúde e educação, atendendo crianças e adultos com deficiências múltiplas e transtorno do espectro do autismo em habilitação. Leva ao conhecimento da sociedade, por meio de um videodocumentário, a existência dos atendimentos oferecidos e como a instituição pode contribuir na vida da pessoa com deficiência. O estudo utilizou a abordagem qualitativa e, como método, o estudo de caso. Os instrumentos de coleta de dados foram: pesquisa bibliográfica, pesquisa de campo com entrevistas em profundidade através de roteiro semiaberto e pesquisa e análise documental. A análise dos dados foi feita por meio da técnica de triangulação para documentar o trabalho realizado pela instituição. Todas as informações coletadas serviram como base para composição do videodocumentário “Sonhos de Maio”, com duração de 67 minutos, que por meio do jornalismo humanizado divulga para sociedade as contribuições da instituição na vida da pessoa com deficiência

    Gas phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA: evidence of metal poor accretion

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    We derive the metallicity (traced by the O/H abundance) of the Narrow Line Region ( NLR) of 108 Seyfert galaxies as well as radial metallicity gradients along their galaxy disks and of these of a matched control sample of no active galaxies. In view of that, observational data from the SDSS-IV MaNGA survey and strong emission-line calibrations taken from the literature were considered. The metallicity obtained for the NLRs %each Active Galactic Nucleus (AGN) was compared to the value derived from the extrapolation of the radial oxygen abundance gradient, obtained from \ion{H}{ii} region estimates along the galaxy disk, to the central part of the host galaxies. We find that, for most of the objects (80%\sim 80\,\%), the NLR metallicity is lower than the extrapolated value, with the average difference ()betweentheseestimatesrangingfrom0.16to0.30dex.Wesuggestthat) between these estimates ranging from 0.16 to 0.30 dex. We suggest that is due to the accretion of metal-poor gas to the AGN that feeds the nuclear supermassive black hole (SMBH), which is drawn from a reservoir molecular and/or neutral hydrogen around the SMBH. Additionally, we look for correlations between DD and the electron density (NeN_{\rm e}), [\ion{O}{iii}]λ\lambda5007 and Hα\alpha luminosities, extinction coefficient (AV)A_{V}) of the NLRs, as well as the stellar mass (MM_{*}) of the host galaxies. Evidences of an inverse correlation between the DD and the parameters NeN_{\rm e}, MM_{*} and AvA_{\rm v} were found

    Gas-phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA : evidence of metal-poor accretion

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    We derive the metallicity (traced by the O/H abundance) of the narrow-line region (NLR) of 108 Seyfert galaxies as well as radial metallicity gradients along their galaxy discs and of these of a matched control sample of no active galaxies. In view of that, observational data from the SDSS-IV MaNGA survey and strong emission-line calibrations taken from the literature were considered. The metallicity obtained for the NLRs was compared to the value derived from the extrapolation of the radial oxygen abundance gradient, obtained from H II region estimates along the galaxy disc, to the central part of the host galaxies. We find that, for most of the objects (∼ 80 per cent), the NLR metallicity is lower than the extrapolated value, with the average difference ( D ) between these estimates ranging from 0.16 to 0.30 dex. We suggest that D is due to the accretion of metal-poor gas to the AGN that feeds the nuclear supermassive black hole (SMBH), which is drawn from a reservoir molecular and/or neutral hydrogen around the SMBH. Additionally, we look for correlations between D and the electron density (Ne), [O III]λ5007, and H α luminosities, extinction coefficient (AV) of the NLRs, as well as the stellar mass (M∗) of the host galaxies. Evidence of an inverse correlation between the D and the parameters Ne, M∗, and Av was found
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