967 resultados para Monte Azul (MG)


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Objective: There is strong evidence that methylene blue (MB), an inhibitor of guanylate cyclase, is an excellent therapeutic option for vasoplegic syndrome (VS) treatment in heart surgery. The aim of this article is to review the MB's therapeutic function in the vasoplegic syndrome treatment. Methods: Fifteen years of literature review. Results: 1) Heparin and ACE inhibitors are risk factors; 2) In the recommended doses it is safe (the lethal dose is 40 mg/ kg); 3) The use of MB does not cause endothelial dysfunction; 4) The MB effect appears in cases of nitric oxide (NO) up-regulation; 5) MB is not a vasoconstrictor, by blocking of the GMPc system it releases the AMPc system, facilitating the norepinephrine vasoconstrictor effect; 6) The most used dosage is 2 mg/kg as IV bolus followed by the same continuous infusion because plasmatic concentrations strongly decays in the first 40 minutes; 7) There is a possible window of opportunity for the MB's effectiveness. Conclusions: Although there are no definitive multicentric studies, the MB used to treat heart surgery VS, at the present time, is the best, safest and cheapest option, being a Brazilian contribution for the heart surgery.

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Adsorption of Reactive Blue 19 dye onto activated red mud was investigated. Red mud was treated with hydrogen peroxide (LVQ) and heated at both 400 °C (LVQ400) and 500 °C (LVQ500). These samples were characterized by pH, specific surface area, point of zero charge and mineralogical composition. Adsorption was found to be significantly dependent on solution pH, with acidic conditions proving to be the most favorable. The adsorption followed pseudo-second-order kinetics. The Langmuir isotherm was the most appropriate to describe the phenomenon of dye removal using LVQ, LVQ400 and LVQ500, with maximum adsorption capacity of 384.62, 357.14 and 454.54 mg g-1, respectively.

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

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Utilizou-se o método seqüencial Monte Carlo / Mecânica Quântica para obterem-se os desvios de solvatocromismo e os momentos de dipolo dos sistemas de moléculas orgânicas: Uracil em meio aquoso, -Caroteno em Ácido Oléico, Ácido Ricinoléico em metanol e em Etanol e Ácido Oléico em metanol e em Etanol. As otimizações das geometrias e as distribuições de cargas foram obtidas através da Teoria do Funcional Densidade com o funcional B3LYP e os conjuntos de funções de base 6-31G(d) para todas as moléculas exceto para a água e Uracil, as quais, foram utilizadas o conjunto de funções de base 6-311++G(d,p). No tratamento clássico, Monte Carlo, aplicou-se o algoritmo Metropólis através do programa DICE. A separação de configurações estatisticamente relevantes para os cálculos das propriedades médias foi implementada com a utilização da função de auto-correlação calculada para cada sistema. A função de distribuição radial dos líquidos moleculares foi utilizada para a separação da primeira camada de solvatação, a qual, estabelece a principal interação entre soluto-solvente. As configurações relevantes da primeira camada de solvatação de cada sistema foram submetidas a cálculos quânticos a nível semi-empírico com o método ZINDO/S-CI. Os espectros de absorção foram obtidos para os solutos em fase gasosa e para os sistemas de líquidos moleculares comentados. Os momentos de dipolo elétrico dos mesmos também foram obtidos. Todas as bandas dos espectros de absorção dos sistemas tiveram um desvio para o azul, exceto a segunda banda do sistema de Beta-Caroteno em Ácido Oléico que apresentou um desvio para o vermelho. Os resultados encontrados apresentam-se em excelente concordância com os valores experimentais encontrados na literatura. Todos os sistemas tiveram aumento no momento de dipolo elétrico devido às moléculas dos solventes serem moléculas polares. Os sistemas de ácidos graxos em álcoois apresentaram resultados muito semelhantes, ou seja, os ácidos graxos mencionados possuem comportamentos espectroscópicos semelhantes submetidos aos mesmos solventes. As simulações através do método seqüencial Monte Carlo / Mecânica Quântica estudadas demonstraram que a metodologia é eficaz para a obtenção das propriedades espectroscópicas dos líquidos moleculares analisados.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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

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DEVELOPMENT AND EVALUATION OF GAS DIFFUSION ELECTRODES (GDE) FOR GENERATION OF H2O2 IN SITU AND THEIR APPLICATION IN THE DEGRADATION OF REACTIVE BLUE 19 DYE. This work reports the development of GDE for electrogeneration of H2O2 and their application in the degradation process of Reactive Blue 19 dye. GDE produced by carbon black with 20% polytetrafluoroethylene generated up to 500 mg L-1 of H2O2 through the electrolysis of acidic medium at -0.8 V vs Ag/AgCl. Reactive Blue 19 dye was degraded most efficiently with H2O2 electrogenerated in the presence of Fe(II) ions, leading to removal of 95% of the original color and 39% of TOC at -0.8 V vs Ag/AgCl.

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This work reports the development of GDE for electrogeneration of H2O2 and their application in the degradation process of Reactive Blue 19 dye. GDE produced by carbon black with 20% polytetrafluoroethylene generated up to 500 mg L-1 of H2O2 through the electrolysis of acidic medium at -0.8 V vs Ag/AgCl. Reactive Blue 19 dye was degraded most efficiently with H2O2 electrogenerated in the presence of Fe(II) ions, leading to removal of 95% of the original color and 39% of TOC at -0.8 V vs Ag/AgCl.

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The complex formed by the tetracycline (TC) molecule with the Mg ion is able to prevent the replication of the genetic material in the bacterial ribosome, making an excellent antibiotic. In general, the absorption and emission spectra of TC are very sensitive to the host ions and the pH of the solvent that the set is immersed. However, the theoretical absorption spectrum available in the literature is scarce and limited to simple models that do not consider the fluctuations of the liquid. Our aim is to obtain the electronic absorption spectrum of TC and the complex Mg:TC in the ratio 1:1 and 2:1. Moreover, we analyze the changes in intensity and shifts of the bands in the systems listed. We performed the simulation using the classical Monte Carlo technique with the Lennard-Jones plus Coulomb potential applied to each atom of the both TC molecule and the Mg:TC complexes in water. The electronic absorption spectrum was obtained from the time-dependent density functional theory using different solvent models. In general, we obtained a good qualitative description of the spectra when compared with the experimental results. The Mg atom shifts the first band by 4 nm in our models, in excellent agreement to the experimental result of 4 nm. The second absorption band is found here to be useful for the characterization of the position where the ion attaches to the TC.

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1. Este trabalho consta de duas partes: a primeira trata do histórico, importância, tipos de jazimentos e gênese dos diamantes. Na segunda é feito um estudo geológico, litológico, mineralógico e econômico da jazida de diamantes de Romaria (antiga Água Suja), localizada na Fazenda Marrecos, município de Romaria, Estado de Minas Gerais. 2. Conhecida desde 1888, a jazida é mencionada em trabalhos de G. Campos, Hussak, Draper e outros autores. Minerada durante algumas décadas por grandes companhias, passou em seguida por uma fase de abandono, voltando atualmente a ser alvo de atenções de nova companhia. A jazida é classificada como "secundária elevada". Os diamantes são encontrados em sedimentos fluviais de idade provavelmente neo-cretácica ou talvez enozoica. Tais sedimentos assentam-se discordantemente sobre o arenito Botucatu e em alguns lugares, diretamente sobre o embasamento cristalino. A seqüência diamantífera é constituída de três camadas, cujos nomes locais são: conglomerado Tauá, que é um conglomerado polimíctico basal, mal selecionado; Secundina, arenito grosseiro com intercalações conglomeráticas e argilosas; Gorgulho, nome dado ao solo rico em canga que recobre toda a área. O Tauá, a camada mais rica em diamantes, foi estudado com maiores pormenores. Distinguem-se dois tipos desse conglomerado: o Tauá tipo e o Tauá atípico. 3. O diamante da jazida de Romaria apresenta hábito cristalino predominantemente rombododecaédrico. Alguns exemplares, quando submetidos à luz ultra-violeta, mostraram fluorescência azul-violácea. Alguns mostraram anisotropia anômala. Os cristais octaédricos normalmente apresentam trígonos de corrosão nas faces de octaedro, enquanto os cúbicos, extremamente corroídos e sempre translúcidos, mostram nas faces de cubo pirâmides reentrantes de base quadrada. Alguns apresentam inclusões de grafita; em um cristal examinado, constatou-se a presença de inclusões de olivina e cromita. Os diamantes da jazida não apresentam arestas arredondadas e sinais de impacto. 4. A reserva mínima provada da jazida é de 2.000.000 m3 de Tauá. A capa a ser removida (Secundina e Gorgulho) tem espessura média de 11 m. O teor médio obtido foi de 16 pontos/m3. 5. O diamante do Tauá parece ter sofrido pouco ou nenhum transporte, sugerindo fonte primária nas proximidades. A presença de inclusões de olivina e cromita indica uma associação primária de diamante com rochas ultrabásicas. 6. Recomendações sobre a lavra do diamante são feitas no final deste trabalho.

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This study has as object eight state vocational schools located in Araguari, Araxá, Frutal, Ituiutaba, Monte Carmelo, Patos de Minas, Uberaba and Uberlândia, in Minas Gerais. The period analyzed comprises the years from 1965 to 1976, from the signature of the Agreement 512-11-610-042 beteween the Ministry of Education and Culture (MEC) and the American Agency for International Development (USAID), which started a series of other agreements, and actions ending up with the creation of the Expansion and Improvement of High Schools Program (Programa de Expansão e Melhoria do Ensino Médio - PREMEM) and, from this, the Vocational Schools. The upper limit of the study, 1976, was the year when these agreements, known as MEC/USAID agreements ceased. The Vocational Schools were characterized as vocation probing schools, directing the professional formation of the population in general, which would happen a posteriori, turning it shorter and more effective, since the labor market would demand, urgently, capable professionals for an expanding economy. The project of Vocational Schools had a national scope, and foresaw, for its unfolding, the complete substitution of State Schools for the new model, called “multi-curricula”. The theme Vocational schools was the object of my Master’s degree study, when I focused the State School Guiomar de Freitas Costa, in Uberlândia. That study raised questionings and concerns that resulted in the central problem of the thesis presented here: understanding the measure in which such schools integrated the country’s development project – mostly in the first half of the military rule – and to understand its structure, functionality and efficacyThe development of the study presented here, demanded the use of several sources: 1) specialized literature about the topics presented, i.e., the situation of national education in a temporal analysis, the political, economical and social context, research methodologies, the theory of human capital, vocational teaching, pedagogical trends and practices, agreements MEC-USAID and PREMEM; 2) national, state and county laws related to the discussion: laws of national education directives and basis, decrees and reports stating about the program of technical cooperation between Brazil and the United States of America, the Program of Expansion and Improvement of Teaching (PREMEM), formation of professors, establishment of Vocational Schools and educational planning; 3) documentation of school archives: books of minutes of Collegiate and of faculty and staff, registrar books with final scores, enrolment, visits of inspector, accounting books, punch clock records, student, professor and staff occurrences, inventory, class schedules, school year calendar, school rules, class reports, payment rolls, bills of sales, exchanged mail, personal documentation of professional personnel, documents of land acquisition, blueprints, manuals of PREMEM, didactic materials/resources used in classes, books available in the school library, structured evaluations for follow-up of school processes, pictures of events, texts prepared for special dates, and news from the official newspaper and, finally, 4) national and local press reports, especially from Folha de São Paulo, Correio de Araxá, Correio de Uberlândia and Lavoura e Comércio (Uberaba). The proposition of Vocational schools was conciliate theoretical and practical formation through an active education permeated by technological resources. The contact with knowledge and several practical activities under professional supervision, the student would identify the knowledge area that would interest him the most and his aptitude. This formation in primary school would make way for the vocation studies in high school, which became mandatory by the law 5.692/71, that reformed school education from the previous levels of elementary, middle high and high school. However, the multi-curricula proposal that would be spread to the other public schools in the country ended up succumbing to the model already established. From its ephemeral existence, maybe the Vocational Schools have not reached the more general goals in political, economic and social aspects; however, this study demonstrated that, for the people that, directly or indirectly, had contact with such schools, a legacy of vocational and quality teaching was made, so much so, that forty years after the end of that proposal, they are still remembered.

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Es un estudio clínico controlado en el que se incluyeron 88 pacientes de ambos sexos en dos grupos asignados aleatoriamente. El grupo infiltración (n = 44) recibió 80 mg de metilprednisolona + 25 mg de bupivacaína al 0.5con epinefrina al 1:200.000 y el grupo conservador (n = 44) recibió 15 mg diarios por vía oral de meloxicam + calor local húmedo y ejercicios de fortalecimiento. En cada grupo hubo 22 pacientes con patología discal diagnosticada por tomografía axial computadorizada. Se evaluó el dolor según la Escala Análoga Visual y la discapacidad según la Escala de Roland Morris, en seis controles, cada semana por 4 semanas y a los 3 y 6 meses. Resultados. En condiciones basales los grupos fueron comparables en la valoración del dolor y la discapacidad. En los dos grupos de estudio no se encontraron diferencias significativas, en cuanto se refiere a la discapacidad y el dolor , sin embargo en el seguimiento tanto la infiltración como el tratamiento conservador produjo alivio inmediato de la sintomatología pero en los controles posteriores el tratamiento conservador tuvo una mejor respuesta en los dos parámetros, dolor a los 3 meses (p = 0.027) y 6 meses (p = 0.039) , discapacidad a la cuarta semana (p = 0.019), El análisis por subgrupos según patología discal no tuvo diferencias significativas. En la escala de Likert que valora la mejoría desde la percepción del paciente hubo una tendencia a beneficiar al grupo que recibió el tratamiento conservador RR 0.8 (IC95: 0.55-1.16). Conclusiones. La infiltración epidural de 80 mg de metilprednisolona + 15 mg de bupivacaína para tratamiento de la lumbalgia crónica con o sin patología discal tuvo igual respuesta que 15 mg diarios de meloxicam por vía oral más terapia física, en un seguimiento de 6 meses