540 resultados para Ffw>> mag!
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This continuing study of intragroup light in compact groups of galaxies aims to establish new constraints to models of formation and evolution of galaxy groups, specially of compact groups, which are a key part in the evolution of larger structures, such as clusters. In this paper we present three additional groups (HCG 15, 35 and 51) using deep wide-field B- and R-band images observed with the LAICA camera at the 3.5-m telescope at the Calar Alto observatory (CAHA). This instrument provides us with very stable flat-fielding, a mandatory condition for reliably measuring intragroup diffuse light. The images were analysed with the OV_WAV package, a wavelet technique that allows us to uncover the intragroup component in an unprecedented way. We have detected that 19, 15 and 26 per cent of the total light of HCG 15, 35 and 51, respectively, are in the diffuse component, with colours that are compatible with old stellar populations and with mean surface brightness that can be its low as 28.4 B mag arcsec(-2). Dynamical masses, crossing times and mass-to-light ratios were recalculated using the new group parameters. Also tidal features were analysed using the wavelet technique.
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We present mid-infrared (mid-IR) spectra of the Compton-thick Seyfert 2 galaxy NGC 3281, obtained with the Thermal-Region Camera Spectrograph at the Gemini-South telescope. The spectra present a very deep silicate absorption at 9.7 mu m, and [S IV] 10.5 mu m and [Ne II] 12.7 mu m ionic lines, but no evidence of polycyclic aromatic hydrocarbon emission. We find that the nuclear optical extinction is in the range 24 mag <= A(V) <= 83 mag. A temperature T = 300 K was found for the blackbody dust continuum component of the unresolved 65 pc nucleus and the region at 130 pc SE, while the region at 130 pc NW reveals a colder temperature (200 K). We describe the nuclear spectrum of NGC 3281 using a clumpy torus model that suggests that the nucleus of this galaxy hosts a dusty toroidal structure. According to this model, the ratio between the inner and outer radius of the torus in NGC 3281 is R(0)/R(d) = 20, with 14 clouds in the equatorial radius with optical depth of tau(V) = 40 mag. We would be looking in the direction of the torus equatorial radius (i = 60 degrees), which has outer radius of R(0) similar to 11 pc. The column density is N(H) approximate to 1.2 x 10(24) cm(-2) and the iron K alpha equivalent width (approximate to 0.5-1.2 keV) is used to check the torus geometry. Our findings indicate that the X-ray absorbing column density, which classifies NGC 3281 as a Compton-thick source, may also be responsible for the absorption at 9.7 mu m providing strong evidence that the silicate dust responsible for this absorption can be located in the active galactic nucleus torus.
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We employ the recently installed near-infrared Multi-Conjugate Adaptive Optics demonstrator (MAD) to determine the basic properties of a newly identified, old and distant, Galactic open cluster (FSR 1415). The MAD facility remarkably approaches the diffraction limit, reaching a resolution of 0.07 arcsec (in K), that is also uniform in a field of similar to 1.8 arcmin in diameter. The MAD facility provides photometry that is 50 per cent complete at K similar to 19. This corresponds to about 2.5 mag below the cluster main-sequence turn-off. This high-quality data set allows us to derive an accurate heliocentric distance of 8.6 kpc, a metallicity close to solar and an age of similar to 2.5 Gyr. On the other hand, the deepness of the data allows us to reconstruct (completeness-corrected) mass functions (MFs) indicating a relatively massive cluster, with a flat core MF. The Very Large Telescope/MAD capabilities will therefore provide fundamental data for identifying/analysing other faint and distant open clusters in the Galaxy III and IV quadrants.
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Syftet med denna systematiska litteraturstudie som inkluderar 18 artiklar, har varit att belysa vilka nutritionsstöd som kan förebygga och behandla malnutrition hos barn med cancer samt vilka omvårdnadsbehov som finns i samband med nutritionsbehandling. Resultatet visade att barn med cancer som behandlas med strålning och/eller cytostatika ofta drabbas av olika biverkningar som påverkar nutritionen. Cirka 46 % av barnen utvecklade malnutrition. Näringsintaget försämrades ofta på grund av biverkningarna vilket fick till följd att behandlingen försämrades samt tillväxt och utveckling påverkades negativt. Olika sätt fanns för att upprätthålla gott nutritionsstatus. Oralt intag förordades för att upprätthålla mag- tarmkanalens struktur och funktion. Alternativ för kostbehandling när barnet inte klarade att inta oral kost var nasogastrisk sond (NS), Perkutan Endoskopisk Gastrostomi (PEG) och Total Parenteral Nutrition (TPN). NS visade sig vara relativt biverkningsfritt och ett alternativ att tillgå under kortare nutritionsbehandlingar. PEG var ett gott alternativ med relativt få biverkningar då barnet behöver nutritionsstöd under längre tid. TPN var ett alternativ enbart då barnet inte kunde äta relaterat till bristande upptag i mag- tarmkanalen. Försämrat näringsintag påverkade barnets livskvalitet. Familjen påverkades genom att ätandet var en stark källa till konflikt mellan barnet och föräldrarna. Det var viktigt att barnet och familjen fick stöd i barnets förmåga att kunna äta samt att erbjudas näringsrik kost. Bedömning av nutritionsstatus och dokumentation av oralt intag, parenteralt intag och effekter av nutritionsbehandlingen var av stor vikt för att kunna ge barnet optimal omvårdnad.
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Syfte: Syftet med studien var att beskriva vilka symtom som påverkade den hälsorelaterade livskvaliteten hos svårt leversjuka patienter samt beskriva hur symtomen påverkade patientens hälsorelaterade livskvalitet. Metod: Vetenskapliga artiklar söktes i databaserna Cinahl, Ovid Medline, Pubmed och PsycINFO. 15 vetenskapliga artiklar godkändes efter kvalitetsgranskning och låg till grund för resultatet. Resultat: I litteraturstudien framkom att patienternas hälsorelaterade livskvalitet påverkades av trötthet, hjärnpåverkan orsakat av sviktande leverfunktion, vätskeansamling i kroppen, klåda, smärta, muskelkramper, symtom från mag-tarmkanalen, benskörhet samt torrhet i ögon och mun. Symtomen påverkade i olika grad den psykiska-, fysiska- och sociala hälsorelaterad livskvaliteten. Psykiskt upplevde patienterna bristande energi och motivation, försämrad sömn, koncentrationssvårigheter, försämrad självkänsla, osäkerhet, frustration, skuld, otillräcklighet, rädsla, oro, ångest, depression och självmordstankar. De fysiska följderna innebar utmattning, andnöd, ökad smärtupplevelse och begränsad förmåga till fysisk aktivitet. Besvären innebar problem att hantera relationer, gav begränsningar i det yrkesverksamma livet, inskränkning i sociala aktiviteter samt svårigheter att klara av det dagliga livet. Slutsatser: Många symtom påverkade den svårt leversjuka patientens hälsorelaterade livskvalitet. Symtomen gav patienten problem att klara av olika vardagssituationer. Den genomförda litteraturstudien ger sjuksköterskan kunskap för att kunna tolka och bedöma de symtom som patienten beskriver.
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Este trabalho tem como objetivo principal mapear os diferentes grupos quese formam nesta comunidade, bem como entender suas intenções nestasformações; pesquisando as práticas sociais de um assentamento rural, CachoeiraGrande, no município de Magé, no Estado do Rio de Janeiro, em suas múltiplasrelações cotidianas. Tomando como ponto de partida as relações entre osmoradores e a associação de moradores, busca-se fazer uma análise das relaçõesde lazer e religião, aqui em suas dimensões envolvendo o futebol e a Igreja daAssembléia de Deus, especificamente, dentro da casa de uma moradora, DonaFrancisca de Jesus. São pontos importantes neste trabalho: a discussão do conceitode sociabilidade proposto por Georg Simmel; e as interações entre os moradores ea Associação. Para isso, utilizei como metodologia de pesquisa, as entrevistasindividuais e coletivas, a observação e a fotografia.
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O conceito de cadeias de suprimentos (supp/y chains) é um dos mais avançados, no contexto da gestão contemporânea de empreendimentos, sendo fundamental para a compreensão da ação dos integrantes dos ramos e canais de fornecimento de recursos para a produção de produtos e serviços. Na indústria da mobilidade, que compreende os esforços voltados para a produção de meios de transporte de tangíveis em geral (incluindo veículos automotores, navios, locomotivas, aviões, dentre outros), a cadeia de suprimentos é complexa e envolve múltiplos canais. Dentre os vários canais, há o que se ocupa de fornecer componentes essenciais para a fabricação de veículos automotores, destacando-se, neste, o de fornecimento de DET (dispositivo eletrônico por toque). Numa economia globalizada, como ocorre no Brasil, neste princípio do século XXI , DET e outros componentes podem ser adquiridos no país ou em qualquer outro lugar do planeta, onde preço, qualidade e condições de fornecimento se mostrarem competitivos. Há, entretanto, fatores perturbadores que prevalecem, mesmo em situação de comércio praticamente livre e com o predomínio de acordos comerciais bilaterais ou multilaterais. Um desses fatores é o risco cambial, aliás, um fenômeno típico da realidade atual, onde instabilidades monetárias podem fazer oscilar a cotação das moedas, alterando inteiramente os padrões de custos vigentes na cadeia de suprimentos, afetando o processo de tomada de decisões e o preço final do produto para o cliente. Visando a reduzir este problema, uma montadora de veículos instalada no Brasil (aqui denominada MAGfl manifestou-se interessada em que os fornecedores de DET com gabarito para integrar sua supp/y chain pudessem fornecer produtos em moeda nacional, significando, na prática, a busca de soluções para melhorar sua competitividade (em qualidade e preço, a primeira com um leque maior de fornecedores e o segundo através da redução do espectro de variações de custo, eliminadas as oscilações cambiais). Deste modo, a empresa pretendeu agregar valor aos seus produtos. A presente dissertação de mestrado, utilizando o método combinado de estudo de caso com PAR (Participatory Action Research ou pesquisaação), retrata a experiência vivida por uma organização transnacional, com negócios no país (a ETE), em sua busca de solução para adequar-se aos objetivos do cliente MAG, adaptando o canal de fornecimento para que maior valor agregado possa ser percebido. A dissertação procura, neste sentido, acompanhar o processo de análise e estudos de viabilidade de um empreendimento denominado "Projeto High Sound", realizado pelas organizações envolvidas, incluindo a pesquisa e a constituição de uma joint venture com parceiro nacional (PAN), contemplando, por fim, a análise de oportunidade sobre a possível operação direta futura da ETE no país confrontada com a análise de manutenção de operação com gestão compartilhada, em sistema de off-set, com empresa gerenciadora de canais de comercialização
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A Prática conciliatória nos Juizados Especiais, que se supunha ser uma medida rápida e eficaz para dirimir os conflitos de interesse, reduzindo de forma rápida o estoque de processos e ainda os gastos da máquina estatal, revela-se, na prática, no mais das vezes, uma grande decepção. Como em 80% dos casos julgados nos Juizados Especiais Cíveis Cariocas a conciliação não é alcançada nesta audiência, esta etapa obrigatória acaba por se transformar apenas em um obstáculo a ser ultrapassado para a resolução dos processos. Desta forma esta pesquisa se propõe a fazer uma reflexão acerca da possibilidade de unificação das audiências de conciliação (AC) e das audiências de instrução e Julgamento (AIJ) em um só ato: uma audiência única de conciliação, instrução e julgamento (ACIJ), com a finalidade de diminuir o tempo do processo, com vistas a alcançar o princípio constitucional da duração razoável do processo.
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The interest in the systematic analysis of astronomical time series data, as well as development in astronomical instrumentation and automation over the past two decades has given rise to several questions of how to analyze and synthesize the growing amount of data. These data have led to many discoveries in the areas of modern astronomy asteroseismology, exoplanets and stellar evolution. However, treatment methods and data analysis have failed to follow the development of the instruments themselves, although much effort has been done. In present thesis, we propose new methods of data analysis and two catalogs of the variable stars that allowed the study of rotational modulation and stellar variability. Were analyzed the photometric databases fromtwo distinctmissions: CoRoT (Convection Rotation and planetary Transits) and WFCAM (Wide Field Camera). Furthermore the present work describes several methods for the analysis of photometric data besides propose and refine selection techniques of data using indices of variability. Preliminary results show that variability indices have an efficiency greater than the indices most often used in the literature. An efficient selection of variable stars is essential to improve the efficiency of all subsequent steps. Fromthese analyses were obtained two catalogs; first, fromtheWFCAMdatabase we achieve a catalog with 319 variable stars observed in the photometric bands Y ZJHK. These stars show periods ranging between ∼ 0, 2 to ∼ 560 days whose the variability signatures present RR-Lyrae, Cepheids , LPVs, cataclysmic variables, among many others. Second, from the CoRoT database we selected 4, 206 stars with typical signatures of rotationalmodulation, using a supervised process. These stars show periods ranging between ∼ 0, 33 to ∼ 92 days, amplitude variability between ∼ 0, 001 to ∼ 0, 5 mag, color index (J - H) between ∼ 0, 0 to ∼ 1, 4 mag and spectral type CoRoT FGKM. The WFCAM variable stars catalog is being used to compose a database of light curves to be used as template in an automatic classifier for variable stars observed by the project VVV (Visible and Infrared Survey Telescope for Astronomy) moreover it are a fundamental start point to study different scientific cases. For example, a set of 12 young stars who are in a star formation region and the study of RR Lyrae-whose properties are not well established in the infrared. Based on CoRoT results we were able to show, for the first time, the rotational modulation evolution for an wide homogeneous sample of field stars. The results are inagreement with those expected by the stellar evolution theory. Furthermore, we identified 4 solar-type stars ( with color indices, spectral type, luminosity class and rotation period close to the Sun) besides 400 M-giant stars that we have a special interest to forthcoming studies. From the solar-type stars we can describe the future and past of the Sun while properties of M-stars are not well known. Our results allow concluded that there is a high dependence of the color-period diagram with the reddening in which increase the uncertainties of the age-period realized by previous works using CoRoT data. This thesis provides a large data-set for different scientific works, such as; magnetic activity, cataclysmic variables, brown dwarfs, RR-Lyrae, solar analogous, giant stars, among others. For instance, these data will allow us to study the relationship of magnetic activitywith stellar evolution. Besides these aspects, this thesis presents an improved classification for a significant number of stars in the CoRoT database and introduces a new set of tools that can be used to improve the entire process of the photometric databases analysis
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The bioassay directed fractionation of the EtOH extract from leaves of Cryptocarya ashersoniana seedlings led to the isolation of two flavonol glucosides: iso-quercitrin and hyperin, which exhibited free radical scavenging activity towards DPPH (IC50 34.4 muM and 32.7 muM, respectively) and were compared to standard compounds rutin (IC50 27.0 muM) and catechin (IC50 41.4 muM). Investigation of extracts from the seedlings roots and stems afforded one antifungal styrylpyrone: goniothalamine, and two dihydropyrones: 6-propyl-5,6-dihydro-2-pyrone and the new 6-[(4'-ethyl-9'-oxabicyclo[3.3.1]non-6'-en-3'-yl)methyl]-5,6-dihydro-2H-pyran-2-one, which had its structure determined by detailed analysis of MS and NMR data, including 2D experiments.
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Extensive systematizations of theoretical and experimental nuclear densities and of optical potential strengths extracted from heavy-ion elastic scattering data analyses at low and intermediate energies are presented. The energy dependence of the nuclear potential is accounted for within a model based on the nonlocal nature of the interaction. The systematics indicates that the heavy-ion nuclear potential can be described in a simple global way through a double-folding shape, which basically depends only on the density of nucleons of the partners in the collision. The possibility of extracting information about the nucleon-nucleon interaction from the heavy-ion potential is investigated.
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In this study, we report on a new route of PEGylation of superparamagnetic iron oxide nanoparticles (SPIONs) by polycondensation reaction with carboxylate groups. Structural and magnetic characterizations were performed by X-ray diffractometry (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and vibrating sample magnetometry (VSM). The XRD confirmed the spinel structure with a crystallite average diameter in the range of 3.5-4.1 nm in good agreement with the average diameter obtained by TEM (4.60-4.97 nm). The TGA data indicate the presence of PEG attached onto the SPIONs' surface. The SPIONs were superparamagnetic at room temperature with saturation magnetization (M S) from 36.7 to 54.1 emu/g. The colloidal stability of citrate- and PEG-coated SPIONs was evaluated by means of dynamic light scattering measurements as a function of pH, ionic strength, and nature of dispersion media (phosphate buffer and cell culture media). Our findings demonstrated that the PEG polymer chain length plays a key role in the coagulation behavior of the Mag-PEG suspensions. The excellent colloidal stability under the extreme conditions we evaluated, such as high ionic strength, pH near the isoelectric point, and cell culture media, revealed that suspensions comprising PEG-coated SPION, with PEG of molecular weight 600 and above, present steric stabilization attributed to the polymer chains attached onto the surface of SPIONs. © 2013 Springer Science+Business Media Dordrecht.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Biologia Geral e Aplicada - IBB