939 resultados para 1-Alkyl-3-methylimidazolium chlorides


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Abstract not available

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Die Voraussetzunen der parametrischen 1- und mehrfaktoriellen Varianzanalyse, mit und ohne Messwiederholungen, werden besprochen. Ferner werden eine Reihe von alternativen Verfahren vorgestellt, insbesondere einige nichtparametrische, darunter RT (rank transform), INT (inverse normal transform), ART (aligned rank transform), Puri & Sen (L statistic), van der Waerden und Akritas & Brunner (ATS anova type statistic), die sich auf die parametrische Varianzanalyse zurückführen lassen, sowie dichotome und ordinale logistische Regression. Hierzu werden Lösungen mit R und SPSS ausführlich gezeigt.

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Ionic liquids (ILs) are organic compounds liquid at room temperature, good electrical conductors, with the potential to form as a means for electrolyte on electrolysis of water, in which the electrodes would not be subjected to such extreme conditions demanding chemistry [1]. This paper describes the synthesis, characterization and study of the feasibility of ionic liquid ionic liquid 1-methyl-3(2,6-(S)-dimethyloct-2-ene)-imidazole tetrafluoroborate (MDI-BF4) as electrolyte to produce hydrogen through electrolysis of water. The MDI-BF4 synthesized was characterized by thermal methods of analysis (Thermogravimetric Analysis - TG and Differential Scanning Calorimetry - DSC), mid-infrared spectroscopy with Fourier transform by method of attenuated total reflectance (FTIR-ATR), nuclear magnetic resonance spectroscopy of hydrogen (NMR 1H) and cyclic voltammetry (CV). Where thermal methods were used to calculate the yield of the synthesis of MDI-BF4 which was 88.84%, characterized infrared spectroscopy functional groups of the compound and the binding B-F 1053 cm-1; the NMR 1H analyzed and compared with literature data defines the structure of MDI-BF4 and the current density achieved by MDI-BF4 in the voltammogram shows that the LI can conduct electrical current indicating that the MDI-BF4 is a good electrolyte, and that their behavior does not change with the increasing concentration of water

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La adopción de estándares internacionales como parte de la estandarización del reporte financiero a nivel mundial ha obligado al Consejo de Vigilancia de la Profesión de Contaduría Pública y Auditoria de El Salvador a buscar mecanismos eficientes y eficaces que garanticen su implementación en los diferentes sectores de la actividad empresarial del país. El Salvador aplicó hasta 1982 principios de contabilidad basado en las leyes mercantiles y leyes tributarias, o bien, principios de contabilidad establecidos por el Instituto Americano de Contadores Públicos y/o el Instituto Mexicano de Contadores Públicos. En enero de 1983 se creó el Comité Técnico, que estableció las Normas de Contabilidad Financiera (NCF) que deben observarse en la preparación y revisión de los estados financieros de conformidad con principios de contabilidad generalmente aceptados. No obstante el trabajo que se había realizado por parte del Comité Técnico, es hasta septiembre de 1999 que el Consejo de Vigilancia hace sus primeras manifestaciones respecto de la necesidad de Aplicar Normas Internacionales de Contabilidad como parte del marco de referencia para la preparación y presentación de los estados financieros, recomendando a las gremiales de contadores promover la difusión de las referidas normas. En octubre de 2003 el Consejo de Vigilancia acordó establecer un plan escalonado para la adopción de las Normas Internaciones de Contabilidad vigentes a esa fecha, acordando además, mantener el marco de referencia de las Normas Internacionales de Contabilidad, así como sus revisiones y actualizaciones, mencionando que en el país, las NIC’s serían conocidas como “Normas de Información Financiera Adoptadas en El Salvador (NIF-ES)”. Desde esa fecha, las gremiales de profesionales, escuelas y departamentos de contaduría pública de las diferentes universidades del país, profesionales y empresarios independientes han realizado numerosos esfuerzos en ese sentido, a efectos de que las NIF-ES sean de dominio de los contadores y profesionales de las distintas empresas del país, no obstante, existen limitantes, debido a los altos niveles teóricos de la normas, estas se vuelven complejas de asimilar principalmente por aspectos de comprensibilidad y aplicabilidad técnica. Es por lo anterior que el presente trabajo de investigación se desarrolló, tomando como muestra de estudio 80 estudiantes que cursaban la materia Contabilidad Financiera IV, ciclo II-2006, de la carrera de Licenciatura de Contaduría Pública de la Universidad de El Salvador, a efectos de evaluar los conocimientos técnicos que estos habían asimilado a ese nivel, encontrando fuertes deficiencias en la parte técnica y en muchos casos desconocimiento de la obligatoriedad que existe en El Salvador de Aplicar NIF-ES. En tal sentido el desarrollo de Capitulo III, pretende dar respuesta a las necesidades encontradas, suministrando un instrumento técnico que recopila a manera de ejemplos, la aplicación práctico de las Normas de Información Financiera Adoptadas en El Salvador (NIF-ES) de la 1 a la 21 y Normas Internacionales de Información Financiera 1 y 3, como un documento de consulta para el proceso de aprendizaje y de educación continuada en la carrera de contaduría pública.

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This is the Official Roster of the South Carolina soldiers, sailors and marines who served in the World War and contains the names and records, briefly compiled, of the men and women from this state who responded to the call of the President when the United States entered the great conflict. This record gives in as compact form as practicable the following : name; serial number; residence; branch of service; date and place of entry into service; place of birth and age; organizations served in, with dates of assignments and transfers; grades with dates of appointment; engagements, if any; wound received in action, with degree and date; if killed in action or died while in service; person notified, relationship and address; oversea service; date of discharge; citations.

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This publication is volume 1, issue 3 of the University of South Carolina Publications. Series III. Biology. on taxonomic studies of the flora and fauna of South Carolina.

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This paper describes, with pictures, how to use voting machines and how to cast your vote.

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A bimonthly literary magazine edited by Zhou Shoujuan 周瘦鵑, featuring fiction, topical articles, and entertainment features, published from September 1921 through November 1925.

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The present work is part of a research project that involves the study of new copper based complexes to be employed as photosensitizer in carbon dioxide photoreduction reaction. My research project is focused on the synthesis and characterization of 1,2,3 triazoles with a quinoline or pyridine in the lateral chain, which have been successively utilized to synthesize heteroleptic Cu(I) complexes. Redox potential and photophysic properties have been studied.

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Esta unidade trata da avaliação, pois não há como fazer gestão sem avaliar se o resultado está sendo alcançado. Inicialmente apresenta-se o primeiro conceito para o termo “Avaliar” e suas variações. Não há uma definição única para avaliação, pois o termo “avaliação”, para ganhar significado, necessita estar acompanhado de outros termos que informem sobre o objeto e o sujeito da avaliação, além dos seus propósitos, objetivos e modos de proceder. A Unidade aborda a avaliação em saúde na lição 2, afim de fazer com que o aluno consiga relacionar os principais conceitos de avaliação em saúde. Para tanto, apresenta os termos da avaliação dos resultados (eficácia, eficiência e efetividade). Na lição 3, são fornecidas informações para que o aluno consiga classificar e diferenciar as diferentes tipologias de avaliação. Apresenta o modelo de Donabedian, considerado como sendo um dos mais empregados para avaliação da qualidade em saúde, principalmente referente aos cuidados médicos, além de retomar o conceito de Imagem-objetivo, proposto por Matus.

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Nesta unidade serão discutidas as diferentes possibilidades para a avaliação de uma política pública como a assistência farmacêutica. O conteúdo inicia com uma abordagem baseada em alguns questionamenteo para avaliação, como “O que está sendo avaliado?; Quem avalia? Neste momento são apresentadas as vantagens e desvantagens entre o envolvimento de avaliadores internos e/ou externos durante o processo e a influencia destes; Como se avalia?; Avaliar para quê? – etapa na qual serão definidas as metodologias adequadas a cada objetivo e cada realidade e os diferentes tipos de avaliação: Investigação Avaliativa, Avaliação para Gestão, e Avaliação para Decisão. Na sequência, o conteúdo define indicadores para avaliação e suas aplicações; dados primários e secundários e os critérios de seleção para um indicador. Ao final da Unidade apresenta-se um modelo metodológico para avaliação da gestão da assistência farmacêutica, com aplicabilidade no exercício didático-pedagógico proposto pelo Curso (Plano Operativo). A intenção desse modelo é detectar dificuldades e obstáculos e produzir recomendações, aproximando o aluno da pesquisa avaliativa Policy Oriented e suas etapas: Formulação; Operacionalização e Síntese: parametrização dos indicadores e leitura dos indicadores.

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In recent years ionic liquids (ILs) have been increasing the popularity and the number of applications. Ionic liquids were used mainly as solvent in organic synthesis, but in recent years they are also used in analytical chemistry, separation chemistry and material science. Additional to significant developments in their chemical properties and applications, ionic liquids are now bringing unexpected opportunities at the interface of chemistry with the life sciences. Ionic liquids (ILs) are currently defined as salts that are composed solely of cations and anions which melt below 100ºC. Our goal in this work is to explore the dual activity of the ionic liquids, due to the presence of two different ions, an anion with bacterial activity as β-lactam antibiotics and different kinds of cations. In this work the anions of ILs and salts were derived from three different antibiotics: ampicillin, penicillin and amoxicillin. The cations were derived from substituted ammonium, phosphonium pyridinium and methylimidazolium salts, such as: tetraethyl ammonium, trihexiltetradecilphosphonium, cetylpyridinium, choline (an essential nutrient), 1-ethyl-3-methylimidazolium, and 1-ethanol-3-methyl imidazolium structures. Commercial ammonium and phosponium halogen salts were first transformed into hydroxides on ionic exchange column (Amberlite IRA-400) in methanol. The prepared hydroxides were then neutralized with β-lactam antibiotics. After crystallization we obtained pure ILs and salts containing β-lactam antibiotics. This work presents a novel method for preparation of new salts of antibiotics with low melting point and their chemistry and microbiological characterization.

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With the increase of bacterial resistance a large number of therapeutic strategies have been used to fight different kind of infections. In recent years ionic liquids (ILs) have been increasing the popularity and the number of applications. First ionic liquids were used mainly as solvent in organic synthesis, but now they are used in analytical chemistry, separation chemistry and material science among others. Additional to significant developments in their chemical properties and applications, ionic liquids are now bringing unexpected opportunities at the interface of chemistry with the life sciences Ionic liquids (ILs) are currently defined as salts that are composed solely of cations and anions which melt below 100ºC. Our goal in this work is to explore the dual activity of the ionic liquids, due to the presence of two different ions, an ion with bacterial activity as a beta-lactam antibiotic and different kinds of cations. In this work the anions of ILs and salts were derived from three different antibiotics: ampicillin, penicillin and amoxicillin. The cations were derived from substituted ammonium, phosphonium pyridinium and methylimidazolium salts, such as: tetraethyl ammonium, trihexiltetradecilphosphonium, cetylpyridinium, choline (an essential nutrient), 1-ethyl-3-methylimidazolium, and 1-ethanol-3-methyl imidazolium structures. Commercial ammonium and phosponium halogen salts were first transformed into hydroxides. on ionic exchange column (Amberlite IRA-400) in methanol. The prepared hydroxides were then neutralized with beta-lactam antibiotics. After crystallization we obtained pure ILs and salts containing beta-lactam antibiotics. This work presents a novel method for preparation of new salts of antibiotics with low melting point and their characterization.