Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-10-26T11:25:15Z No. of bitstreams: 2 leonardo_silva_fonseca.pdf: 558027 bytes, checksum: ebbd4e5757256f06304ab810e9c330c7 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-10-26T11:25:57Z (GMT) No. of bitstreams: 2 leonardo_silva_fonseca.pdf: 558027 bytes, checksum: ebbd4e5757256f06304ab810e9c330c7 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Made available in DSpace on 2015-10-26T11:25:57Z (GMT). No. of bitstreams: 2 leonardo_silva_fonseca.pdf: 558027 bytes, checksum: ebbd4e5757256f06304ab810e9c330c7 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Com este trabalho, objetivou-se estudar os efeitos do balan?o eletrol?tico (BE) em ra??es para su?nos na fase de crescimento. O experimento foi conduzido no Setor de Suinocultura da Escola Estadual Jer?nimo Pontello em Couto de Magalh?es de Minas, MG, durante os meses de fevereiro e mar?o de 2011. Foram utilizados 36 leit?es h?bridos comerciais, 18 machos castrados e 18 f?meas, em fase de crescimento, com peso inicial 23,48 ? 1,68 kg, distribu?dos em delineamento experimental inteiramente casualisados, com cinco tratamentos e tr?s repeti??es, sendo a unidade experimental composta por dois animais (um macho e uma f?mea), na baia. Os animais permaneceram em experimento recebendo ra??o e ?gua ? vontade at? atingirem o peso de 55,98 ? 4,05 kg. As condi??es ambientais do galp?o foram monitoradas diariamente, utilizando termo-higr?metro, a leitura dos equipamentos foi utilizada para caracterizar o ambiente t?rmico da instala??o. Os animais receberam cinco ra??es, sendo: 100, 150, 200, 250 e 300 mEq/kg. Para corre??o do BE, foram utilizadas inclus?es de bicarbonato de s?dio e, ou, cloreto de c?lcio em substitui??o ? areia lavada. Durante o per?odo experimental, as vari?veis avaliadas foram consumo de ra??o di?rio (CRD), ganho de peso di?rio (GPD), convers?o alimentar (CA), temperatura retal (TR) e superficial (TS), frequ?ncia respirat?ria (FR) e n?vel dos eletr?litos no sangue. A temperatura observada foi 25,89 ? 1,53 ?C com UR do ar de 78,5 ? 11,15 %, temperatura de globo negro de 26,1 ? 2,64 ?C e ITGU calculado em 75,0 ? 2,69, condi??es estas consideradas como moderado desconforto t?rmico para su?nos em crescimento. O BE n?o influenciou o desempenho (CRD, GPD, CA) de su?nos em crescimento, no entanto, promoveu altera??es na consist?ncia f?sica das fezes para as caracterizadas como pastosas e diarreicas. N?o houve efeito do BE na frequ?ncia respirat?ria, assim como para as demais caracter?sticas fisiol?gicas. N?o houve diferen?a estat?stica para os n?veis de eletr?litos no sangue dos animais. A corre??o do BE da ra??o n?o se faz necess?ria, visto que o desempenho n?o ? alterado dentro da faixa de 100 a 300 mEq/kg, faixa na qual se encontra o BE de ra??es pr?ticas e daquelas com teores reduzidos de prote?na bruta. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The effects of EB (electrolyte balance) in diets for growing swine were evaluated. The experiment was conducted in Couto Magalh?es de Minas, MG, during the months of February and March 2011. Were used 36 commercial hybrid swine, 18 males castrated and 18 females in the growth phase, with initial body weight 23.48 ? 1.68 kg, distributed in a completely randomized experimental design with five treatments and three replications, and the experimental unit composed of two animals (one male and one female), in the box. The animals were fed diets in an experiment and water ad libitum until they reach the average weight of 55.98 ? 4.05 kg. The environmental conditions were evaluated, characterizing the thermal environment of the installation. The animals received five rations, as follows: 100, 150, 200, 250 and 300 mEq/kg. For correction of EB, inclusions were used sodium bicarbonate and either calcium chloride to replace the washed sand. During the experimental period, the variables analyzed were daily feed intake (DFI), daily gain (DG), feed conversion (FC), superficial and rectal temperature, respiratory frequency and level of electrolytes in the blood. The average temperature was 25.89 ? 1.53 ?C with relative humidity of the air 78.5 ? 11.15 %, black globe temperature of 26.1 ? 2.64 ?C and BGT estimated at 75.0 ? 2.69, conditions considered as moderated thermal discomfort. The EB didn?t influence on performance parameters (DFI, DG, FC) for growing swine, however, led to changes in the stools of growing swine to diarrhea and loose stools. The EB didn?t influence on respiratory frequency and others physiological parameters. There wasn?t statistical difference for levels of electrolytes in the blood of animals. The correction of EB ration isn?t necessary, the performance isn?t changed in the range 100 to 300 mEq/kg, range of the feed practical and with low levels of crude protein.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-20T21:00:39Z No. of bitstreams: 1 JoseAugustoFurtadoDeOliveira_TESE.pdf: 11981801 bytes, checksum: be6108ea3598a35772ebda5b1f75b6f4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-21T20:30:52Z (GMT) No. of bitstreams: 1 JoseAugustoFurtadoDeOliveira_TESE.pdf: 11981801 bytes, checksum: be6108ea3598a35772ebda5b1f75b6f4 (MD5) / Made available in DSpace on 2016-01-21T20:30:52Z (GMT). No. of bitstreams: 1 JoseAugustoFurtadoDeOliveira_TESE.pdf: 11981801 bytes, checksum: be6108ea3598a35772ebda5b1f75b6f4 (MD5) Previous issue date: 2014-06-02 / Ag?ncia Nacional do Petr?leo, G?s Natural e Biocombust?veis - ANP / O processamento prim?rio do g?s natural em plataformas como a do Campo de Mexilh?o (PMXL-1) na Bacia de Santos, onde o Monoetileno glicol (MEG) tem sido utilizado como inibidor da forma??o de hidratos, apresenta problemas operacionais causados por incrusta??es de sal na unidade de recupera??o do MEG. Pesquisa bibliogr?fica e an?lise dos dados de solubilidade de sal em misturas de solventes, a saber: ?gua e MEG, revelam que estudos experimentais est?o dispon?veis para um n?mero relativamente restrito das esp?cies i?nicas presentes na ?gua produzida, tais como NaCl e KCl. O objetivo deste trabalho foi desenvolver um m?todo de c?lculo para a solubilidade de um sal em misturas de solventes, neste caso, para o NaCl ou KCl em misturas aquosas contendo MEG. O m?todo de c?lculo estendeu o modelo de Pitzer, com a abordagem de Lorimer, para sistemas aquosos contendo um sal e um outro solvente (MEG). A linguagem Python no ambiente de desenvolvimento integrado (IDE) Eclipse foi usada na cria??o de aplicativos computacionais. Os resultados indicam a viabilidade da modelagem proposta para uma s?rie de dados de solubilidade do sal (NaCl ou KCl) em misturas de ?gua e MEG. Al?m disso, o aplicativo desenvolvido em Python tem demonstrado ser adequado para estima??o de par?metros e de simula??o / Primary processing of natural gas platforms as Mexilh?o Field (PMXL-1 ) in the Santos Basin, where monoethylene glycol (MEG) has been used to inhibit the formation of hydrates, present operational problems caused by salt scale in the recovery unit of MEG. Bibliographic search and data analysis of salt solubility in mixed solvents, namely water and MEG, indicate that experimental reports are available to a relatively restricted number of ionic species present in the produced water, such as NaCl and KCl. The aim of this study was to develop a method for calculating of salt solubilities in mixed solvent mixtures, in explantion, NaCl or KCl in aqueous mixtures of MEG. The method of calculating extend the Pitzer model, with the approach Lorimer, for aqueous systems containing a salt and another solvent (MEG). Python language in the Integrated Development Environment (IDE) Eclipse was used in the creation of the computational applications. The results indicate the feasibility of the proposed calculation method for a systematic series of salt (NaCl or KCl) solubility data in aqueous mixtures of MEG at various temperatures. Moreover, the application of the developed tool in Python has proven to be suitable for parameter estimation and simulation purposes

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-08-01T11:55:03Z No. of bitstreams: 1 AndreyJoseMoraesDeLima_DISSERT.pdf: 2671095 bytes, checksum: 5c9ecacd56db46c55bf4d3ca78559cc9 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-08-02T13:26:05Z (GMT) No. of bitstreams: 1 AndreyJoseMoraesDeLima_DISSERT.pdf: 2671095 bytes, checksum: 5c9ecacd56db46c55bf4d3ca78559cc9 (MD5) / Made available in DSpace on 2017-08-02T13:26:05Z (GMT). No. of bitstreams: 1 AndreyJoseMoraesDeLima_DISSERT.pdf: 2671095 bytes, checksum: 5c9ecacd56db46c55bf4d3ca78559cc9 (MD5) Previous issue date: 2016-03-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Eletr?litos comp?sitos constitu?dos por uma matriz cer?mica de c?ria (CeO2) ou c?ria-gadol?nia (Ce0,9Gd0,1O2-?, CGO) e misturas eut?ticas de Na2CO3/Li2CO3 ou LiCl/KCl permitem reduzir a temperatura de funcionamento de c?lulas a combust?vel de 600 - 800 ?C para a faixa entre 400 e 600 ?C. Neste trabalho, eletr?litos comp?sitos ? base de c?ria e sais fundidos (misturas eut?ticas de carbonatos ou cloretos) foram obtidos pelo m?todo citrato. A rota qu?mica adotada possibilitou a s?ntese em simult?neo das duas fases dos comp?sitos, com um controle preciso de composi??o e microestrutura, promovendo uma substancial intera??o qu?mica entre fases. O estudo avaliou os efeitos da composi??o (teor de carbonato ou cloreto em matriz de c?ria ou CGO) e do processamento (temperatura de sinteriza??o) na microestrutura e propriedades de transporte dos comp?sitos. A caracteriza??o estrutural por difra??o de raios X revelou que os carbonatos e cloretos existem como fases amorfas. Apesar das baixas densidades relativas (entre 52 e 75%), decorrentes das reduzidas temperaturas de sinteriza??o (c?ria/carbonatos a 690 ?C e c?ria/cloretos entre 400 e 600 ?C), observou-se que a fus?o das fases amorfas atua como um selo que pode evitar o fluxo de gases atrav?s das amostras. A correla??o entre a composi??o e o comportamento el?trico, recorrendo ?s t?cnicas de espectroscopia de infravermelho, microscopia eletr?nica de varredura e espectroscopia de imped?ncia, permitiu ampliar o conhecimento existente sobre as novas caracter?sticas destes materiais relativamente aos eletr?litos convencionais. / Solid electrolyte is the part of the fuel cell has three essential functions: separate reagents, blocking electronic current and have high ionic conductivity of the elements that compose it. Composite electrolytes consisting of a ceria (CeO2) or ceria-gadolinia (Ce0,9Gd0,1O2, CGO) ceramic matrix and eutectic mixtures of Na2CO3/Li2CO3 or LiCl/KCl allow reducing the operating temperature of ceramic fuel cells from 600 - 800?C to 400 ? 600 ?C. In this paper, composite electrolytes based on ceria and molten salts (eutectic mixtures of carbonates and chlorides) were obtained by the citrate method. The adopted chemical route enabled the simultaneous synthesis of the two phases, with precise control of composition and microstructure, providing substantial chemical interaction between phases. The study evaluated the effects of composition (carbonate or chloride content in the ceria based matrix) and processing (sintering temperature) on microstructure and transport properties of the composites. The structural characterization by X-ray diffraction showed that the carbonates and chlorides exist as amorphous phases. Despite the low relative densities (between 52 and 75%), as a result of reduced sintering temperatures (ceria/carbonate at 690?C and ceria/chloride between 400 and 600?C), it was observed that the fusion of the amorphous phase acts as a seal that can prevent the flow of gases through the samples. The correlation between the composition and the electrical behavior, using the infrared spectroscopy techniques, scanning electron microscopy and impedance spectroscopy, has observed a homogeneous microstructural distribution between phases, indicating the formation of a ceramic skeleton based on ceria, surrounded by a mixture of amorphous salts, obtaining a conductivity of 0.079 S cm-1 and 0,058 cm-1 S for the ceria composite and carbonates at 600 ? C and 0.0016 S cm-1 and 0.0011 S cm-1 for composites ceria and chlorides at 450 ? C.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-10-16T18:19:32Z No. of bitstreams: 1 2013 - Gabriela Ferreira de Oliveira.pdf: 1149006 bytes, checksum: e5df0fd5e246ea685fd7bb50c7ab42d5 (MD5) / Made available in DSpace on 2018-10-16T18:19:32Z (GMT). No. of bitstreams: 1 2013 - Gabriela Ferreira de Oliveira.pdf: 1149006 bytes, checksum: e5df0fd5e246ea685fd7bb50c7ab42d5 (MD5) Previous issue date: 2013-08-12 / Sodium is the major electrolyte of the extra cellular space, essential for the control of plasma osmolality and blood pressure. In addition, sodium is the only mineral for which there is a defined appetite. For sodium homeostasis and for the regulation of extra cellular fluid, the reported physiological systems include the renin angiotensin aldosterone system, atrial natriuretic peptide and oxytocin. In mice the feeding behavior of sodium is well established and the central inhibition of sodium appetite has been demonstrated. However, in some domestic species, especially in horses, subject of this study, this behavior has not yet been clarified. This study aimed to evaluate the clinical and hematological effects, beyond the assessment of fluid and electrolyte balance and feeding behavior of fluids after the central administration of enalaprilat in horses experimentally dehydrated. Six adult, gelding horses, were used. The animals were subjected to water and food restriction for 72 hours prior the study, associated with the administration of three doses of furosemide in the first 24 hours. After the 72 hours fasting, the animals were divided into two experimental groups. The first group was called Control Group (CG) and the second, Treaty Group (TG). The animals of TG received 2.75 mg/animal of enalaprilat by intracarotideal route. After administration of enalaprilat, the animals had free access to water and hypertonic saline solution (1.8% of NaCl), with ingested volumes monitored. All animals were submitted to a regular and periodical physical examination, measured blood pressure and collected blood samples every 12 hours until the administration of enalaprilat, to evaluate the effects of dehydration; and 30, 60, 120, 180 minutes and 24 hours after administration, to evaluate the drug effects. Weight loss was the parameter that best reflected dehydration, which was estimated at 10.5% at the end of 72 hours of food and water restriction. When the animals had free access to water and saline, we observed a higher total water consumption in TG (13.7 ? 12 L) than in the CG (9.1 ? 7.9 L), with no significant difference between groups (p = 0.3522). There was no significant difference between GC and GT in clinical and hematological parameters, in all moments evaluated. Evaluating the sodium appetite, as evidenced by the ratio between salt intake and the amount of fluid consumed, it was observed that the TG showed lower sodium appetite than the CG (p = 0 0396), observed 120 minutes after the central administration of enalaprilat, demonstrating the centrally action of ACE inhibitor (enalaprilat) in inhibition of sodium appetite in horses. / O s?dio ? o principal eletr?lito do espa?o extracelular, fundamental para o controle da osmolaridade plasm?tica e press?o arterial, al?m de ser o ?nico mineral para qual existe um apetite claramente definido. Para a homeostase do s?dio e do fluido extracelular, os sistemas fisiol?gicos relatados incluem o sistema renina angiotensina aldosterona (SRAA), pept?deo natriur?tico atrial (ANP) e ocitocina (OT). O comportamento ingestivo de s?dio em ratos j? est? bem estabelecido e a inibi??o central do apetite por s?dio j? foi demonstrada. Por?m, em algumas esp?cies dom?sticas, especialmente nos equinos, tema deste trabalho, este comportamento ainda n?o foi esclarecido. O objetivo deste trabalho foi avaliar os efeitos cl?nicos e hematol?gicos, al?m da avalia??o do equil?brio hidroeletrol?tico e do comportamento ingestivo de l?quidos ap?s a administra??o central de enalaprilato em equinos experimentalmente desidratados. Foram utilizados seis equinos adultos, machos, castrados, que permaneceram em jejum h?drico e alimentar por 72 horas, associado ? administra??o de furosemida. Ap?s 72 horas de jejum, os animais foram divididos em dois grupos experimentais, o Grupo Controle (GC) e o Grupo Tratado (GT), que recebeu 2,75 mg/animal de enalaprilato por via intracarot?dea. Ap?s, os animais tiveram livre acesso a ?gua e a solu??o salina hipert?nica (1,8% de NaCl). Os animais foram avaliados atrav?s de exame cl?nico, a cada 12 horas durante as 72 horas de jejum e 30, 60, 120, 180 minutos e 24 horas ap?s o Enalaprilato. Foram avaliados o peso corporal, a quantidade de l?quidos ingeridos, a press?o arterial m?dia, par?metros bioqu?micos e eletrol?ticos sangu?neos. A perda de peso corporal foi o par?metro que melhor refletiu a desidrata??o, estimada em 10,5% ao final de 72 horas de jejum. Com o restabelecimento do acesso ? ?gua e solu??o salina, observou-se maior consumo total de ?gua no GT (13,7 ? 12 L) que no GC (9,1 ? 7,9 L), sem diferen?a significativa entre os grupos (p = 0,3522). N?o houve diferen?a significativa nos par?metros cl?nicos e hematol?gicos avaliados entre o GC e o GT. O apetite por s?dio foi reduzido significativamente (p = 0, 0396) no GT comparado ao GC, evidenciado 120 minutos ap?s a administra??o do enalaprilato, demonstrando a a??o central do inibidor de ECA (Enalaprilato) na inibi??o do apetite por s?dio em equinos.

Made available in DSpace on 2014-12-17T15:01:37Z (GMT). No. of bitstreams: 1 HumbertoNMO_dissert.pdf: 1947865 bytes, checksum: 483437cde9982b75917556f1e4d183b7 (MD5) Previous issue date: 1999-06-11 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / In the present work are established initially the fundamental relationships of thermodynamics that govern the equilibrium between phases, the models used for the description of the behavior non ideal of the liquid and vapor phases in conditions of low pressures. This work seeks the determination of vapor-liquid equilibrium (VLE) data for a series of multicomponents mixtures of saturated aliphatic hydrocarbons, prepared synthetically starting from substances with analytical degree and the development of a new dynamic cell with circulation of the vapor phase. The apparatus and experimental procedures developed are described and applied for the determination of VLE data. VLE isobarics data were obtained through a Fischer s ebulliometer of circulation of both phases, for the systems pentane + dodecane, heptane + dodecane and decane + dodecane. Using the two new dynamic cells especially projected, of easy operation and low cost, with circulation of the vapor phase, data for the systems heptane + decane + dodecane, acetone + water, tween 20 + dodecane, phenol + water and distillation curves of a gasoline without addictive were measured. Compositions of the equilibrium phases were found by densimetry, chromatography, and total organic carbon analyzer. Calibration curves of density versus composition were prepared from synthetic mixtures and the behavior excess volumes were evaluated. The VLE data obtained experimentally for the hydrocarbon and aqueous systems were submitted to the test of thermodynamic consistency, as well as the obtained from the literature data for another binary systems, mainly in the bank DDB (Dortmund Data Bank), where the Gibbs-Duhem equation is used obtaining a satisfactory data base. The results of the thermodynamic consistency tests for the binary and ternary systems were evaluated in terms of deviations for applications such as model development. Later, those groups of data (tested and approved) were used in the KijPoly program for the determination of the binary kij parameters of the cubic equations of state original Peng-Robinson and with the expanded alpha function. These obtained parameters can be applied for simulation of the reservoirs petroleum conditions and of the several distillation processes found in the petrochemistry industry, through simulators. The two designed dynamic cells used equipments of national technology for the determination of VLE data were well succeed, demonstrating efficiency and low cost. Multicomponents systems, mixtures of components of different molecular weights and also diluted solutions may be studied in these developed VLE cells / No presente trabalho s?o inicialmente estabelecidas as rela??es termodin?micas fundamentais que governam o equil?brio entre fases, sendo apresentados os modelos utilizados para a descri??o do comportamento n?o ideal das fases l?quidas e vapor em condi??es de baixas press?es. Este trabalho visou a determina??o de dados de equil?brio l?quido-vapor (ELV) para uma s?rie de misturas de hidrocarbonetos alif?ticos saturados multicomponentes preparadas sinteticamente a partir de subst?ncias com grau P.A., e o desenvolvimento de uma nova c?lula din?mica com circula??o da fase vapor. Os dispositivos e os procedimentos experimentais s?o descritos e aplicados para a determina??o destes dados de EL V. Dados de EL V isob?ricos foram determinados, atrav?s de um ebuli?metro Fischer de circula??o das fases l?quida e vapor, para os sistemas pentano + do decano, heptano + dodecano, decano + dodecano. Atrav?s das duas novas c?lulas din?micas especialmente projetadas, de f?cil opera??o e baixo custo, com circula??o da fase vapor, os sistemas heptano + decano + dodecano, acetona + ?gua, tween 20 + dodecano, fenol + ?gua e curva de destila??o de uma gasolina sem aditivo foram estudados experimentalmente. As composi??es das fases em equil?brio foram encontradas por densimetria, cromatografia e analisador de carbono org?nico total. Curvas de calibra??o de densidade versus composi??o foram preparadas a partir de misturas sint?ticas e avaliados os comportamentos de seus volumes de excesso. Os dados de ELV obtidos experimentalmente para os sistemas aquosos e hidrocarbonetos foram submetidos a testes de consist?ncia termodin?mica, bem como os dados obtidos da literatura para outros sistemas bin?rios, principalmente no banco de dados DDB (Dortmund Data Bank), utilizando a equa??o de Gibbs-Duhem, obtendo uma s?rie de dados com consist?ncia satisfat?ria. Os resultados dos testes de consist?ncia termodin?mica, obtidos para os sistemas bin?rios e tern?rio, foram avaliados em termos de desvios para aplica??es tais como desenvolvimento de modelos. Posteriormente, esses conjuntos de dados (testados e aprovados) foram usados no programa KijPoly para a determina??o dos par?metros bin?rios kij das equa??es de estado c?bicas de Peng-Robinson original e com a fun??o alfa expandida. Os par?metros obtidos podem ser aplicados para simula??o das condi??es de reservat?rios de petr?leo e dos v?rios processos de destila??o encontrados na ind?stria petroqu?mica, atrav?s de simuladores. Os dois novos projetos de c?lulas din?micas usaram equipamentos de tecnologia nacional para a determina??o de dados de ELV foram bem sucedidos, demonstrando efici?ncia e baixo custo. Sistemas multicomponentes e com componentes de diferentes pesos moleculares, e at? em concentra??es dilu?das foram e podem ser estudados nessas c?lulas de ELV desenvolvidas