Sintesis
Mostrando 25-36 de 47 artigos, teses e dissertações.
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25. Poliuretanos elastoméricos obtenidos a partir de aceite de ricino y almidón de yuca original y modificado con anhídrido propiónico: síntesis, propiedades fisicoquímicas y fisicomecánicas
Chemical modification of cassava starch was conducted through an acylation reaction by using pyridine and propionic anhydride to replace the functional groups of starch. Polyurethane elastomers were prepared using suspensions of the mixture obtained from castor oil and yucca starch that was modified by a propionic anhydride reaction. The suspensions were cha
Química Nova. Publicado em: 2010
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26. Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas
Synthetic hydroxyapatite, Ca10(PO4)6(OH)2, is a biomaterial used to reconstruct damaged bone tissue or to recover protheses. Indeed, the chemical composition and structure is similar to the mineral phase contained in the scheleton. This similarity favors the formation of bonds with the bone, it becomes then a biocompatible material. Hydroxyapatite may be obt
Matéria (Rio de Janeiro). Publicado em: 2010
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27. Enseñanza de la bioética: una síntesis
A bioética vem se consolidando como uma disciplina estruturada desde a década de 1970, e desde o início teve uma crescente preocupação pela melhor maneira de ser ministrada nos níveis de pré-grado. Muitos docentes tiveram de se adaptar às disponibilidades de professores e de recursos, enquanto que outros conseguiram elaborar programas mais extensos.
Revista Brasileira de Educação Médica. Publicado em: 2009-12
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28. Síntesis y caracterización de espumas flexibles de poliuretano obtenidas a partir de aceite de castor maleinizado
In this work, the synthesis of polyurethane flexible foam is realized with the experimental design Taguchi, using castor oil with and without maleinization. The kinetic reaction of oil esterification was monitored by estimating the number of acid groups (ASTM D4662 - 03), and the mechanical properties of the foam were studied, including density, tensile resi
Polímeros. Publicado em: 2009-06
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29. Crónicas de la afronegritud en América : la autonomía interpretativa de los afrodescendientes en la tradición cristiana
En este trabajo el autor examina el legado teológico cristiano de los africanos y sus descendientes en América. En el primer capítulo elabora una síntesis del origen de los afronegros que remonta a los albores de la humanidad, pasa por la civilización egipcia, revisa los registros de antiguos viajes de africanos a América e interpreta las teorías que
Publicado em: 2009
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30. Trabalho e conflito docente: experiências em escolas de educação profissional no Brasil e na Argentina
En esta tesis se buscó comprender las acciones de los docentes frente las reformas de la educación profesional en la década de 1990, en Brasil y Argentina. El problema abordado por esta investigación fué que tales reformas se realizaron en un contexto mas amplio de reformas de los Estados y de reformas educacionales de estos países que, bajo la lógica
Publicado em: 2009
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31. La unificación de luz, electricidad y magnetismo: la "síntesis electromagnética" de Maxwell
In the early nineteenth century, light, electricity and magnetism were considered as three independent phenomena. While interest in optics was justified by its application to the manufacture of optical instruments, electrical and magnetic phenomena could be interesting for scientists but they had no practical applications. In this work, and after a brief des
Revista Brasileira de Ensino de Física. Publicado em: 2008
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32. Wavelet transform in digital inpainting / Aplicação de wavelets em inpainting digital
Digital Inpainting is a recent techinique that allows the filling of missing information in images. One important attribute of a digital inpainting technique is the ability of altering an image in such a way that it is not simple for the human observer to detect the modification, characterizing an undetectable modification. The strategies for filling missing
Publicado em: 2007
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33. NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SYNTESIS Y CARACTERIZACIÓN / NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SÍNTESE E CARACTERIZAÇÃO / HIGHLY LUMINESCENT ZNO NANOESTRUCTURES: SYNTHESIS AND CHARACTERIZATION
Zinc Oxide hás been synthesized by evaporation, condensation, and oxidation of methallic zinc under atmospheric pressure. Two methods of synthesis, denominated stationary and dynamic, were developed in this study. In the stationary system has the local control of temperature and a alumina tube-furnace reactor has been used. Zn was evaporated at 900-1000 C i
Publicado em: 2007
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34. Sentido das disciplinas de formação humanística e social de orientação cristã da Unisinos conforme percepção de alunos e professores
El objetivo de la investigación es comprender el sentido de las disciplinas de formación humanística y social de orientación cristiana de la UNISINOS para esa formación, en la percepción de alumnos y profesores de la UNISINOS, y los saberes que los alumnos y los profesores consideran importantes para que las disciplinas alcancen sus objetivos. Para alc
Publicado em: 2007
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35. GLUCONEOGÉNESIS HEPÁTICA EN OVINOS (Ovis aries) ALIMENTADOS CON UNA DIETA ALTA EN NITRÓGENO NO PROTEICO
La adición en la dieta de nitrógeno no proteico (NNP) aumenta la ureagénesis afectando a la gluconeogénesis hepática por reducción en la conversión de propionato a glucosa in vitro (Overton et al 1999), sin embargo los experimentos in vivo son contradictorios (Fernández et al 1988, Choung y Chamberlain 1995, Mutsvangwa et al 1997, Fernández et al 20
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/05/2006
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36. Reibergrama para la evaluación de la síntesis intratecal de C3c
INTRODUCTION: Reiber's quotient diagram or reibergram has a growing apply for characterize the intratecal synthesis of proteins. Firstly reibergrama was used for the major classes of immunoglobulins but later it was used to evaluate other proteins based on the theory about molecular flux/cerebrospinal fluid (CSF) flow rate. METHOD: C3c is a degradation produ
Arquivos de Neuro-Psiquiatria. Publicado em: 2006-09