203 research outputs found
ALIMENTOS À MESA: DIDÁTICA PARA ASSIMILAÇÃO DE CONTEÚDOS NO CENTRO DE ENSINO MÉDIO BENJAMIM JOSÉ DE ALMEIDA, NA CIDADE DE ARAGUAÍNA - TO
Este trabalho faz parte dossiê temático associado ao II Seminário da RP/UFT, com o tema: “Formação e prática docente – concepções, trajetórias e desafios da Residência Pedagógica da UFT"
Effects of Enteral Fluid Therapy in Continuous Flow Administered by Nasogastric Tube in Buffalo Calves
To investigate the employment of enteral fluid therapy in continuous flow administered by a nasogastric tube in buffalo calves; toassesstheeffectsof a hypotonic and an isotonic electrolyte solutionon: vital functions, blood count and serum andurinary biochemistry profile of buffalo calves. Seven buffalo calves, clinically healthy, were submitted to two treatments. The solutions were administered in continuous flow through a nasogastric tube at a dose of 15 mL/kg/hr for 12 hours. The serum biochemistry profile showed an increase in chloride concentration, decrease in serumurea and osmolarity. In urine, anincrease in sodium and chloride concentrations and a decrease in calcium, creatinine and urea were observed. Enteral fluid therapy in continuous flow proved to beeasy to use and effective in maintaining volemia and concentration of electrolytes in buffalo calves
Produção de ácido acrílico a partir da oxidação catalítica do propileno
Trabalho de Conclusão de Curso (graduação)—Universidade de Brasília, Instituto de Química, 2017.O propósito deste trabalho foi realizar uma avaliação da implementação de uma planta de produção de ácido acrílico 99,9% a partir da oxidação parcial do propileno em um reator de leito fluidizado com catalisadores metálicos heterogêneos. Com esse objetivo, foi realizada a simulação do processo com a utilização do programa Aspen HYSYS a partir das especificações iniciais do projeto. Em seguida, com os dados fornecidos pelo simulador, foram efetuados os cálculos dos parâmetros de design dos equipamentos, além das tubulações e sistemas de segurança, com fins de determinação do ótimo econômico de toda planta para, então, proceder-se à avaliação financeira considerando-se, também, o preço dos reagentes e produtos aliado à quantidade utilizada destes e o mercado financeiro de 2017 para o produto desejado e, assim, provar a viabilidade da instalação do sistema de produção no complexo industrial. A capacidade da planta permitirá uma produção em larga escala do composto, o qual será destinado a diversas utilizações, como fabricação de adesivos, papéis, tecidos, tintas, vernizes, revestimentos, couro, entre outros.The purpose of this work was to make an evaluation of the implementation of a plant for the production of acrylic acid 99,9% starting from the partial oxidation of propylen in a fluidized bed reactor with heterogeneous metallic catalysts. With that objective, a simulation of the process was made utilizing Aspen HYSYS program, with the initial specifications for the project. Afterwards, with the data provided by the simulator, the calculation of the design parameters of the equipments, including pipes and security systems to determine the overall economical optimum to proceed to the financial evaluation, also considering the reagent and product prices, allied to their respective quantities used in the plant, and the financial market in 2017 for the desired product and, by this, prove the viability of the installation of the production system in the industrial complex. The plant capacity will allow a large scale production of the compound, which will be destined to various uses, like the fabrication of adhesives, papers, textiles, paints, varnishes, coating, among others
Avaliação da suscetibilidade in vitro de Pseudomonas aeruginosa a métodos alternativos de terapias antimicrobianas
O aumento da prevalência de bactérias multirresistentes, fundamentalmente em unidades de terapia intensiva, é preocupação constante órgãos internacionais de saúde pública. O impacto causado esta relacionado diretamente a aumento de morbimortalidade, além de causar elevação de gastos à assistência à saúde por aumentar o tempo de internação. Com isso, desenvolver métodos alternativos de controlar o crescimento bacteriano sem gerar resistência adicional é de fundamental importância. Assim, devido características físico-químicas de ozônio, extratos essenciais de plantas e terapia fotodinâmica ganham destaque. Foi possível avaliar, in vitro, que ozônio diluído em óleos de dendê e girassol apresentou-se com atividade bactericida e capaz de inibir crescimento bacteriano da Pseudomonas aeruginosa, assim como extratos naturais de limão taiti e laranja amarga. Apesar de haver diferença na eficácia entre eles, principalmente devido a grande variabilidade de compostos bioativos existentes em cada um particularmente, todos apresentaram atividade antimicrobiana. Em relação à terapia fotodinâmica, através da utilização de fotossensibilizador (azul de metileno), gerou impacto significativo, reduzindo 80% da quantidade de colônias bacterianas existentes, mostrando-se promissor no controle de crescimento bacteriano. A partir dos resultados obtidos, foi evidenciado que as terapias utilizadas, de forma in vitro, corroboram o estimulo ao desenvolvimento de terapias alternativas no controle bacteriano
Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions
We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe
Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC
Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe
Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV
Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 2GeV/c. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B. V.Peer reviewe
Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV
Peer reviewe
Robust estimation of bacterial cell count from optical density
Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data
Rationale, study design, and analysis plan of the Alveolar Recruitment for ARDS Trial (ART): Study protocol for a randomized controlled trial
Background: Acute respiratory distress syndrome (ARDS) is associated with high in-hospital mortality. Alveolar recruitment followed by ventilation at optimal titrated PEEP may reduce ventilator-induced lung injury and improve oxygenation in patients with ARDS, but the effects on mortality and other clinical outcomes remain unknown. This article reports the rationale, study design, and analysis plan of the Alveolar Recruitment for ARDS Trial (ART). Methods/Design: ART is a pragmatic, multicenter, randomized (concealed), controlled trial, which aims to determine if maximum stepwise alveolar recruitment associated with PEEP titration is able to increase 28-day survival in patients with ARDS compared to conventional treatment (ARDSNet strategy). We will enroll adult patients with ARDS of less than 72 h duration. The intervention group will receive an alveolar recruitment maneuver, with stepwise increases of PEEP achieving 45 cmH(2)O and peak pressure of 60 cmH2O, followed by ventilation with optimal PEEP titrated according to the static compliance of the respiratory system. In the control group, mechanical ventilation will follow a conventional protocol (ARDSNet). In both groups, we will use controlled volume mode with low tidal volumes (4 to 6 mL/kg of predicted body weight) and targeting plateau pressure <= 30 cmH2O. The primary outcome is 28-day survival, and the secondary outcomes are: length of ICU stay; length of hospital stay; pneumothorax requiring chest tube during first 7 days; barotrauma during first 7 days; mechanical ventilation-free days from days 1 to 28; ICU, in-hospital, and 6-month survival. ART is an event-guided trial planned to last until 520 events (deaths within 28 days) are observed. These events allow detection of a hazard ratio of 0.75, with 90% power and two-tailed type I error of 5%. All analysis will follow the intention-to-treat principle. Discussion: If the ART strategy with maximum recruitment and PEEP titration improves 28-day survival, this will represent a notable advance to the care of ARDS patients. Conversely, if the ART strategy is similar or inferior to the current evidence-based strategy (ARDSNet), this should also change current practice as many institutions routinely employ recruitment maneuvers and set PEEP levels according to some titration method.Hospital do Coracao (HCor) as part of the Program 'Hospitais de Excelencia a Servico do SUS (PROADI-SUS)'Brazilian Ministry of Healt
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