984 resultados para composto celulósico


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Pós-graduação em Microbiologia Agropecuária - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Zootecnia - FCAV

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This work was developed to evalute the physical and mechanical properties of a panel of three particle layers from the test specification of NBR 14810-3 (2006), using wood of Eucalyptus sp. and Eucalyptus saligna and Eucalyptus urograndis bark. The mechanical properties were evaluated to obtain the bending modulus of rupture (MOR) and modulus of elasticity (MOE) and Internal bond. The physical properties were obtained thickness sweeling, water absorption, moisture content and board density. Were evaluated four different compositions of panels containing 5, 10, 15 and 20% in the inner layer of bark. The results were compared with the Brazilian standard NBR 14810-2 (2006) and also with studies in the literature. The panels produced were adequate to all the optimal values suggested by the standard only in the composition with 5% skin in the inner layer. The other treatments showed satisfactory results in all tests except for moisture content

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Based on the fierce competitiveness of manufacturing companies and the planning problems arising from the lack of flexibility and forecasting demand, companies are increasingly looking to reflect on the most appropriate methods to manage its manufacture. Today it is possible to obtain higher gains and lower costs through very efficient tools, this paper uses action-research to model and implement the physical layout of a manufacturing cell, with strong theoretical basement returned to Lean Production System and acting systematically in flexibility in mounting. Through observation and joint action of the observer and staff can report problems that occurred during the phases of planning and implementation of improvements. With the improvement of the physical arrangement in the assembly was possible to obtain significant gains by reducing the production cycle, the manpower required, spending of non-compliance and increasing productivity, final product quality and health in the workplace

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The research aimed to produce sheets of particles with waste processing of Eucalyptus sp bonded with urea-formaldehyde and evaluate the effect of pressure variation in the quality of the boards produced. To do so, the Boards made were divided into two treatments depending on the pressing pressure of 30 to 40 kgf / cm². Once pressings, climatized, the particleboards have been sectioned in test samples, and underwent physical-mechanical tests for determining density, swelling and water absorption, modulus of rupture and elasticity in static bending and internal linking. The particleboards pressed at 40 kgf / cm ² showed the best results

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The Therapy with proton beam has shown more e ective than Radiotherapy for oncology treatment. However, to its planning use photon beam Computing Tomography that not considers the fundamentals di erences the interaction with the matter between X-rays and Protons. Nowadays, there is a great e ort to develop Tomography with proton beam. In this way it is necessary to know the most likely trajectory of proton beam to image reconstruction. In this work was realized calculus of the most likely trajectory of proton beam in homogeneous target compound with water that was considered the inelastic nuclear interaction. Other calculus was the analytical calculation of lateral de ection of proton beam. In the calculation were utilized programs that use Monte Carlo Method: SRIM 2006 (Stopping and Range of Ions in Matter ), MCNPX (Monte Carlo N-Particle eXtended) v2.50. And to analytical calculation was employed the software Wolfram Mathematica v7.0. We obtained how di erent nuclear reaction models modify the trajectory of proton beam and the comparative between analytical and Monte Carlo method

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A introdução de um novo produto farmacêutico no mercado requer prévia realização de estudos pré-clínicos e clínicos, principalmente aqueles relacionados à toxicidade e segurança do novo composto e incluem a investigação de efeitos deletérios. Uma nova tiazolidinodiona (TZD) – lyso-07 - sintetizada pelo Laboratório de Planejamento e Síntese de Fármacos da Universidade Federal de Pernambuco foi submetida a testes em ratos wistar para avaliação de toxicidade. O estudo envolveu a utilização de 20 animais distribuídos em quatro grupos: água (1ml/0,25kg animal), suspensão (1ml/0,25kg animal), lyso-07 (4,5 mg/ml) e lyso-07 na dose equimolar da pioglitazona (3,58 mg/ml). Os resultados dos parâmetros ALT, AST, colesterol, creatinina, glicose e ureia nos grupos tratados com a lyso – 07 não apresentaram diferenças estatisticamente significativas em relação ao grupo controle, o que permite inferir que a nova molécula não apresentou hepatotoxicidade, nefrotoxicidade e disfunções dos níveis de colesterol e glicemia nas condições experimentais empregadas. Já os resultados de CK e CK-MB apresentaram resultados dispersos dentro e fora da normalidade descrita na literatura, dificultando a obtenção de resultados conclusivos quanto a cardiotoxicidade da lyso - 07. Portanto, esta molécula demonstrou-se promissora, mas ainda requer novos estudos para sua introdução futura no mercado

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This work aims to talk about some considerations arisen from the process of elaboration of a special dictionary composed of chromatic phrases found in Botanic and Zoology domains, as well as to present its macrostructure and microstructure. Our efforts are concentrated on creating a simple and complete structure, which may be the most adequate for the audience, i.e., for specialists and students connected to the Environment area.

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Pós-graduação em Engenharia Mecânica - FEIS

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronomia (Ciência do Solo) - FCAV