Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-01-15T21:58:58Z No. of bitstreams: 1 JosielleSoaresDaSilva_DISSERT.pdf: 1920540 bytes, checksum: ef0c4f564479ff1bb5e56b1eaf67d22c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-01-18T12:06:06Z (GMT) No. of bitstreams: 1 JosielleSoaresDaSilva_DISSERT.pdf: 1920540 bytes, checksum: ef0c4f564479ff1bb5e56b1eaf67d22c (MD5) / Made available in DSpace on 2018-01-18T12:06:06Z (GMT). No. of bitstreams: 1 JosielleSoaresDaSilva_DISSERT.pdf: 1920540 bytes, checksum: ef0c4f564479ff1bb5e56b1eaf67d22c (MD5) Previous issue date: 2016-02-26 / A presente pesquisa objetiva analisar a implementa??o do Programa Ci?ncia sem Fronteiras na Universidade Federal do Rio Grande do Norte, procurando evidenciar, na vis?o de gestores e coordenadores de cursos, as contribui??es do processo de mobilidade acad?mica proporcionadas pelo Programa Ci?ncia sem Fronteiras em cursos de gradua??o da mesma institui??o. Para sua realiza??o, os procedimentos t?cnicos utilizados foram a revis?o bibliogr?fica, a an?lise de documentos, a tabula??o de dados quantitativos e as entrevistas semiestruturadas. A revis?o bibliogr?fica permitiu aprofundar os conhecimentos acerca dos fen?menos e processos que permeiam o objeto em estudo, com destaque para a globaliza??o e a internacionaliza??o; a an?lise de documentos proporcionou maiores conhecimentos sobre as diretrizes internacionais para a internacionaliza??o e a Pol?tica de Ci?ncia, Tecnologia e Inova??o implementada no pa?s com diretrizes indutoras para a internacionaliza??o da educa??o em n?vel superior, como forma de fomentar o desenvolvimento cient?fico e tecnol?gico para o pa?s. As entrevistas semiestruturadas possibilitaram a verifica??o com base nos relatos dos gestores e dos coordenadores as contribui??es da internacionaliza??o via mobilidade acad?mica pelo Programa Ci?ncia sem Fronteiras para os cursos de gradua??o. O estudo evidenciou que os coordenadores entendem como importante a internacionaliza??o no ?mbito das institui??es de ensino superior, principalmente no que diz respeito ao desenvolvimento do ensino, ? troca de conhecimentos e o contato com uma cultura diferente. No tocante ? contribui??o do Programa Ci?ncia sem Fronteiras para os cursos, os coordenadores n?o possuem a mesma vis?o. A an?lise revela que a contribui??o do Programa CsF para a efetiva internacionaliza??o acad?mica e inser??o da dimens?o internacional no ensino superior, na vis?o da maioria dos coordenadores, ? pouco prof?cua diante da forma como o Programa est? implementado, pois segundo o ponto de vista dos gestores e coordenadores n?o h? uma efetiva??o de la?os acad?micos entre as institui??es. / It is clear that the process of socio-economic, cultural and technological change pose new training needs for higher education institutions. Discuss about higher education in the actual capitalist society inevitably leads to debate about the changes brought about by globalization and the new demands for higher education institutions that are part of the complex and contradictory fabric of society. In this logic, the internationalization of higher education is a set of proactive efforts of higher education institutions to respond to competitive and economic demands of the globalized world. This brings the higher education institutions to seek internationalization, since through it we can raise the advancement of quality education programs, research and extension and promote institutional inclusion in the global context of higher education. Taking these aspects into consideration, this study aims to analyze the implementation of the program Science without Borders at the Federal University of Rio Grande do Norte, looking for evidence, in the view of managers and coordinators of course, the contributions of academic mobility process provided by Science without Borders program in undergraduate courses at the same institution. For its realization were used as technical procedures to literature review, document analysis, tabulation of quantitative data and semi-structured interviews. The literature review allowed to deepen the knowledge about the phenomena and processes that permeate the object under study, with an emphasis on globalization and internationalization; document analysis provided greater knowledge of international guidelines for internationalization and Policy Science, Technology and Innovation implemented in the country with inducing guidelines for the internationalization of education at the college level, in order to foster scientific and technological development for the country . The semi-structured interviews made it possible to check on the basis of reports of managers and engineers the contributions of international academic mobility via the Science Without Borders program for undergraduate courses. The study showed that the coordinators understand how important internationalization within higher education institutions, especially with regard to the development of education, the exchange of knowledge and contact with a different culture. Regarding the contribution of the Science Without Borders Program for the courses, the coordinators do not have the same vision. The analysis reveals that the CsF Programme contribution to the effective academic internationalization and integration of the international dimension in higher education, in the view of most engineers, it is very fruitful given the way the program is implemented, because from the point of view of managers coordinators and there is no effective academic links between institutions.

Made available in DSpace on 2014-12-17T14:07:11Z (GMT). No. of bitstreams: 1 JotaCL_TESE.pdf: 5010463 bytes, checksum: 1561e00830959256c5a6c3c69602a56b (MD5) Previous issue date: 2012-08-30 / O processamento t?rmico de materiais cer?micos via energia de microondas, no est?gio atual, vem ganhando cada dia mais import?ncia, tendo em vista suas in?meras aplica??es, como por exemplo: aplica??o de microondas na ?rea de processamento mineral (aquecimento de min?rios antes da moagem, secagem, redu??o carbot?rmica de ?xidos minerais, lixivia??o, fus?o, pr?-tratamento de min?rios e concentrados de ouro refrat?rio, regenera??o de carv?o, etc. de acordo com Kigman & Rowson, 1998). Em virtude de uma s?rie de vantagens em potencial, frente aos m?todos convencionais de aquecimento, como redu??o no tempo de processamento; economia de energia; diminui??o do di?metro m?dio das part?culas e melhoramento nas propriedades tecnol?gicas em geral, esta tecnologia vem se destacando. Neste contexto, o objetivo geral deste trabalho, ? desenvolver uma pesquisa visando identificar e caracterizar novas op??es de mat?rias-primas cer?micas como argilas, feldspatos e caulins que sejam eficazes para definir a formula??o de uma ou mais massas para produ??o de componentes de cer?mica estrutural com propriedades f?sicas, mec?nicas e est?ticas adequadas ap?s passarem por sinteriza??o convencional e por energia de microondas destacando as vantagens desta ?ltima. Al?m dos requisitos t?cnicos e de processo, as formula??es apresentadas dever?o atender ?s expectativas de pre?o e de log?stica de fornecimento. No estudo foram conformados corpos-de-prova por extrus?o e prensagem, sinterizados em fornos microondas e convencional, sob ciclos de queima mais r?pidos que os atualmente praticados. As mat?rias-primas foram caracterizadas e analisadas, utilizando as t?cnicas de fluoresc?ncia por raios X (FRX), difra??o por raios X (DRX), an?lise t?rmica diferencial (DTA), an?lise t?rmica gravim?trica (DTG), an?lise granulom?trica (AG), microscopia eletr?nica de varredura (MEV), absor??o d agua (AA), massa especifica aparente (MEA), porosidade aparente (PA), retra??o linear (RL) e tens?o de ruptura e flex?o (TRF). Os resultados obtidos indicaram que as propriedades tecnol?gicas de Absor??o de ?gua (AA) e Tens?o de Ruptura e flex?o (TRF), proposto no trabalho foram adquiridos com sucesso e est?o bem al?m do limite exigido pelas especifica??es das normas da ABNT NBR 15.270/05 e 15.310/09

Made available in DSpace on 2014-12-17T14:08:45Z (GMT). No. of bitstreams: 1 BrennyDS_DISSERT.pdf: 1612127 bytes, checksum: 3c87c1df9d7ae2d4e7fffbc7fbfdc3ee (MD5) Previous issue date: 2011-04-05 / When it comes to oil and gas in Brazil is almost certain that we are referring to activities in deep waters off the coast of Campos, Rio de Janeiro, the main field of action of PETROBRAS and a small number of multinational oil companies . Since the Law 9.478/97 allows, by means of concessions, that other companies other than Petrobras, to explore and produce oil and gas domestically. Soon it moved, then the private companies that want small and medium-sized businesses to invest in such activities, forming a segment of independent producers, as occurs in other countries. In this context, this work aims at making an economic feasibility study, is currently analyzing how this thread and focus on the factors that contribute to its development as well as those that constitute barriers. To this end, we conducted a survey examining some mature fields that are in production in order to capture cost information in the phases of project, operation and abandonment. The work also presents an analysis of the results obtained in the survey, identifying the costs higher. With the results obtained through the study used economic engineering tools such as NPV and IRR, using a variety of design scenarios, to study the economic viability of these fields. In scenario 4 was set a production of 4.0 m? / d of oil, which is an expected average production for several of these fields, whose minimum value of a barrel of oil, to enable this field, was $ 55.00, this value well below what was being practiced in the market today. / Quando se fala em produ??o de petr?leo e g?s no Brasil ? quase certo que estamos nos referindo ?s atividades desenvolvidas em ?guas profundas no litoral de Campos, no Rio de Janeiro, principal cen?rio de atua??o da PETROBRAS e de um pequeno n?mero de companhias multinacionais de petr?leo. Sendo que a Lei 9.478/97 permitiu, por meio de concess?es, que outras companhias, al?m da Petrobras, explorassem e produzissem petr?leo e g?s em territ?rio nacional. Logo passou-se, ent?o, a desejar que empresas privadas de pequeno e m?dio porte investissem em tais atividades, formando um segmento de produtores independentes, como ocorre em outros pa?ses. Neste contexto, o presente trabalho tem como objetivo, fazer um estudo de viabilidade econ?mica, analisando como se encontra atualmente este segmento e focalizar os fatores que colaboram para o seu desenvolvimento, assim como aqueles que se constituem em entraves. Para tal, foi feita uma pesquisa analisando alguns campos maduros, no intuito de captar informa??es de custos nas fases de projeto, opera??o e abandono. O trabalho apresenta, tamb?m, uma an?lise dos principais resultados obtidos com a realiza??o da pesquisa, identificando os maiores custos. Com os resultados obtidos atrav?s da pesquisa, foi utilizado ferramentas da engenharia econ?mica, tais como VPL e TIR, utilizando v?rios cen?rios de projetos, para fazer o estudo da viabilidade econ?mica desses campos. No cen?rio 4 foi definido uma produ??o de 4,0 m?/d de petr?leo, que ? uma produ??o m?dia esperada por v?rios desses campos, cujo o valor m?nimo do barril de petr?leo, para viabilizar esse campo, foi de U$ 55,00, valor esse bem abaixo do que estar sendo praticado no mercado atualmente.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-16T20:54:14Z No. of bitstreams: 1 SamirDoNascimentoValcacio_DISSERT.pdf: 5025545 bytes, checksum: 86238af38914f484b62ba415688d27cb (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-19T21:40:00Z (GMT) No. of bitstreams: 1 SamirDoNascimentoValcacio_DISSERT.pdf: 5025545 bytes, checksum: 86238af38914f484b62ba415688d27cb (MD5) / Made available in DSpace on 2016-08-19T21:40:00Z (GMT). No. of bitstreams: 1 SamirDoNascimentoValcacio_DISSERT.pdf: 5025545 bytes, checksum: 86238af38914f484b62ba415688d27cb (MD5) Previous issue date: 2016-02-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A Bacia Potiguar, localizada na margem equatorial Brasileira, possui diversas rochas sedimentares que s?o afetadas por intrus?es ?gneas b?sicas cenozoicas, conhecidas como Magmatismo Macau. Dentre os efeitos mais proeminentes, relacionados a estas intrus?es, temos a forma??o de buchitos, rochas pirometam?rficas que ocorrem em altas temperaturas e baixas press?es, na f?cies sanidinito. Por meio de revis?o bibliogr?fica, observa??es de campo, petrografia, petrof?sica, acesso a bancos de informa??es de trabalhos pr?vios na ?rea e resultados da presente pesquisa, foi poss?vel caracterizar e estimar os efeitos termais produzidos na aur?ola de alguns corpos hipabissais nesta bacia. As fei??es mais relevantes associadas ?s intrus?es s?o: compacta??o, faturamento hidr?ulico, fus?o parcial e recristaliza??o das rochas encaixantes. De acordo com as ocorr?ncias minerais registradas, interpretam-se de 800 a 1200oC e press?es inferiores a 0,5 kbar nas proximidades dos corpos ?gneos. O modelamento t?rmico do plug S?o Jo?o registrou o efeito metam?rfico at? 150 m do contato com dissipa??o de calor total em aproximadamente 265 mil anos. Ap?s o pico de temperatura, seguiu-se a fase de arrefecimento registrada com remobiliza??o e precipita??o de minerais de baixa temperatura em falhas, fraturas e geodos, derivados de rea??es com de por??es sedimentares e fluidos metassom?ticos / hidrotermais, com abundante silicifica??o e carbonatiza??o. / The Potiguar Basin is located in the Brazilian Equatorial Margin and presents sedimentary rocks affected by Cenozoic basic igneous intrusions, known as Macau Magmatism. The most prominent effect related to these intrusions is the formation of buchites, pyrometamorphic rocks that occur at very high temperatures and very low pressures in the sanidinite metamorphic facies. Through literature review, field observations, petrographic and petrophysical data, accessing the database of previous studies and results from this research, it was possible to characterize and estimate the effects produced in the thermal aureole of some hypabyssal bodies in the basin. The most relevant features associated with the intrusions are: compactation, hydraulic fracturing, partial melting and recrystallization of country rocks. According to the observed mineral occurrences, temperature of 800 to 1200 ?C and pressure below 0,5 kbar were estimated at the contacts of the igneous bodies. The thermal modeling of the S?o Jo?o plug indicates thermal effects extending up to 150 m away from the contact and cooling time of approximately 265,000 years. After the peak of temperature, followed a cooling phase registered by remobilization and precipitation of minerals at low-temperature in faults, fractures and geodes, interpreted as derived from reactions with sedimentary rocks and metasomatic / hydrothermal fluids with abundant carbonatization and silicification.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-10-11T20:39:41Z No. of bitstreams: 1 MichelineDosReisAraujo_TESE.pdf: 2152789 bytes, checksum: 46d89fee61e001b69b0444ee74632831 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-10-14T00:04:59Z (GMT) No. of bitstreams: 1 MichelineDosReisAraujo_TESE.pdf: 2152789 bytes, checksum: 46d89fee61e001b69b0444ee74632831 (MD5) / Made available in DSpace on 2016-10-14T00:04:59Z (GMT). No. of bitstreams: 1 MichelineDosReisAraujo_TESE.pdf: 2152789 bytes, checksum: 46d89fee61e001b69b0444ee74632831 (MD5) Previous issue date: 2016-04-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Neste trabalho foram conformados substratos cer?micos de zirc?nia nanoparticulada estabilizada com 3 mol% de ?tria pelo processo de colagem de fitas (?tape casting?) em meio aquoso em uma faixa de espessura de 100 e 150 ?m, os quais apresentam grande interesse tecnol?gico para aplica??es eletroeletr?nicas. Suspens?es para a colagem de fitas foram preparadas em duas diferentes composi??es: 20% ligante - 22% solvente e 25% ligante - 17% solvente (em peso). Uma emuls?o acr?lica comercial serviu como ligante. A estabilidade da suspens?o de zirc?nia estabilizada com ?tria foi analisada por medida de reologia, atrav?s de curvas de viscosidade. Ambas as suspens?es apresentaram comportamento pseudopl?stico, o que ? desej?vel para a t?cnica de colagem de fitas. Ap?s o processo de colagem realizou-se prensagem uniaxial em diferentes temperaturas (40?C e 60?C) e tempos (5 e 10 minutos) nas fitas cer?micas, para a conforma??o dos laminados. An?lise T?rmica Diferencial (ATD) e Termogravim?trica (ATG) foram realizadas para se definir os par?metros para a sinteriza??o dos laminados. Ap?s a sinteriza??o ? 1500?C foram realizados ensaios de Difra??o de Raios X, densidade e porosidade, resist?ncia mec?nica ? flex?o, microdureza Vickers e Microscopia Eletr?nica de Varredura (MEV) para se avaliar as propriedades dos laminados obtidos al?m de analisar o tamanho e crescimento do gr?o. As amostras laminadas em menores temperaturas de prensagem apresentaram delamina??o entre as interfaces das fitas cer?micas, por?m sem influ?ncia significativa no comportamento mec?nico destes materiais. A composi??o com maior teor de ligante apresentou maiores valores de resist?ncia mec?nica devido ? maior quantidade deste componente propiciar melhorias no processo de conforma??o dos laminados. / Various processing techniques are based on the suspension of ceramics particles in an aqueous or non-aqueous media. One of these techniques is called tape casting, which need of a stabilized suspension with high concentration of solids and adequate rheological behavior, which can define if a process route is viable or not. Typical tape cast slurries are prepared by dispersion of a powder in an organic or nonorganic solvent, with a dispersant, followed by the addition of binders, plasticizers, and other additives. These slurries are cast through a so-called doctor blade over a flat carrier. In this study were shaped ceramic substrates of nanoparticulate zirconia stabilized with 3 mol% yttria by tape casting process in aqueous medium at thickness range of 100 to 150 micrometers which have great technological interest for applications electro-electronic. Tape casting slurries were prepared with two different compositions: 20% binder ? 22% solvent e 25 % binder - 17% solvent (wt.%). A commercial acrylic emulsion served as binder. The stability of the yttria-stabilized zirconia slurries was analyzed by means of rheological characterization through viscosity curves. Both slurries showed a pseudoplastic behavior, which is desired for tape casting. After the tape casting process was made uniaxial pressing at different temperatures (40?C and 60?C) and time (5 and 10 minutes) in ceramic tapes for forming the laminates. Differential Thermal Analysis (DTA) and thermogravimetry (TGA) were performed to define the parameters for the sintering of the laminate. After sintering at 1500?C were performed X Ray Diffraction (XRD), density and porosity, flexural strength, microhardness and Scanning Electron Microscopy (SEM) to evaluate the properties of the obtained laminates. Laminated samples at lower press temperatures showed delamination between the interfaces of the ceramic tapes, however no significant influence on the mechanical behavior of these materials. The composition with higher binder content shows higher values of mechanical resistance due the greater amount of this component provide improvements in the laminate forming process

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-09-27T19:30:21Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) amanda_escobar_teixeira.pdf: 1867154 bytes, checksum: a9782b1752452b0bdb34a3ba10ae56bb (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-10-01T17:48:46Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) amanda_escobar_teixeira.pdf: 1867154 bytes, checksum: a9782b1752452b0bdb34a3ba10ae56bb (MD5) / Made available in DSpace on 2018-10-01T17:48:46Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) amanda_escobar_teixeira.pdf: 1867154 bytes, checksum: a9782b1752452b0bdb34a3ba10ae56bb (MD5) Previous issue date: 2018 / Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo deste trabalho foi avaliar os efeitos da dieta de cafeteria desde a lacta??o nos par?metros nutricionais e na a??o da risperidona nos comportamentos de ansiedade, locomo??o, mem?ria e intera??o social. Foram utilizadas 14 ninhadas de ratos da linhagem Wistar (Rattus novergicus) alojados em gaiolas individuais, sob condi??es padr?o. Os ratos machos de cada ninhada formaram, da lacta??o at? a fase adulta, os grupos: Controle (CTRL) ? receberam ra??o padr?o e ?gua ad libitum (n = 42); Cafeteria (CAF) ? receberam dieta de cafeteria e ?gua ad libitum (n = 42). Entre o 114? e o 119? dia de vida, os animais foram subdividos (n = 21) para receberem o tratamento com salina (CTRL-S e CAF-S) ou risperidona (CTRL-R e CAF-R). Nesse per?odo foram realizados os testes comportamentais do labirinto em cruz elevado, campo aberto, teste de reconhecimento de objetos e intera??o social. No 119? os animais foram colocados em jejum, para que, no 120? dia fossem anestesiados e eutanasiados por exsanguina??o. Foram avaliados: consumo de ra??o, ingest?o cal?rica, peso corporal, ganho de peso, coeficiente de efici?ncia alimentar (CEA), comprimento naso-anal e ?ndice de massa corporal (IMC); peso dos ?rg?os e do tecido adiposo abdominal; teores de colesterol total e fra??es, triacilglicerol e glicemia do soro; teor de lip?dios, colesterol total e triacilglicerol do f?gado e das fezes; estado redox do f?gado e de diferentes por??es do enc?falo (c?rtex pr?-frontal e hipocampo). Foi utilizada an?lide de vari?ncia (ANOVA) seguida de Newman Keuls quando necess?rio (P<0,05). O grupo CAF demonstrou menor ingest?o alimentar e maior ingest?o cal?rica, devido ? densidade energ?tica da dieta. O maior consumo cal?rico se configurou em maior ganho de peso, CEA, IMC e ac?mulo de tecido adiposo abdominal. O grupo CAF tamb?m obteve eleva??o dos n?veis de triacilglicerol plasm?ticoa, al?m de lip?dios e triacilglicerol hep?tico, que foram classificados em esteatose hep?tica. Ao mesmo tempo, houve uma rela??o ruim entre as fra??es do colesterol plasm?tico (HDL-c, LDL-c e VLDL-c), com aumento do risco de doen?as aterog?nicas. Portanto, a dieta de cafeteria foi capaz de reproduzir um modelo de obesidade humana e de s?ndrome metab?lica. Os animais do grupo de cafeteria apresentaram caracter?sticas de estresse oxidativo no hipocampo, o que pode comprometer a fun??o dessa estrutura e promover altera??es comportamentais. O grupo CAF - S obteve efeito ansiol?tico devido ao maior n?mero de entradas e tempo gasto no centro do campo aberto, al?m de maior locomo??o atrav?s do maior n?mero de quadrantes percorridos. CAF - S ainda demonstrou preju?zos na mem?ria avaliados atrav?s do teste de reconhecimento de objetos e diminui??o da intera??o social. Tais efeitos podem estar associados a altera??es no sistema serotonin?rgico desses animais. CAF - R demonstrou efeito ansiog?nico e diminui??o na locomo??o no campo aberto. No teste de reconhecimento de objetos, houve diminui??o na intera??o com os objetos, sem, no entanto, melhorar o ?ndice de discrimina??o em rela??o a CAF - S. No teste de intera??o social, CAF - R obteve maior sociabilidade. Os resultados da administra??o da risperidona indicam que esta droga possui um efeito diferente quando aplicada em animais que foram tratados com dieta de cafeteria desde a lacta??o. / Disserta??o (Mestrado) ? Programa de P?s-gradua??o em Ci?ncias Farmac?uticas, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018. / The objective of this work was to evaluate the effects of the cafeteria diet from lactation on the nutritional parameters and the action of risperidone on the behaviors of anxiety, locomotion, memory and social interaction. Fourteen litters of Wistar rats (Rattus novergicus) housed in individual cages were used under standard conditions. The male rats from each litter formed from the lactation to the adult phase, the groups: Control (CTRL) - received standard chow and water ad libitum (n = 42); Cafeteria (CAF) - received cafeteria diet and water ad libitum (n = 42). Between days 114 and 119, animals were subdivided (n = 21) to receive treatment with saline (CTRL-S, CAF-S) or risperidone (CTRL-R and CAF-R). During this period, the behavioral tests of the plus maze size, open field, test of object recognition and social interaction were performed. At 119? the animals were fasted, so that on the 120? day they were anesthetized and euthanized by exsanguination. The following were evaluated: feed intake, caloric intake, body weight, weight gain, food efficiency coefficient (FEC), naso-anal length and body mass index (BMI); weight of organs and abdominal adipose tissue; levels of total cholesterol and fractions, triacylglycerol and serum glycemia; lipid content, total cholesterol, and triacylglycerol of liver and faeces; redox status of the liver and different portions of the encephalon (prefrontal cortex and hippocampus). Variance analysis (ANOVA) was used followed by Newman Keuls when necessary (p<0,05). The CAF group demonstrated lower dietary intake and higher caloric intake, due to the energy density of the diet. The highest caloric intake was in greater weight gain, FEC, BMI and abdominal adipose tissue accumulation. The CAF group also achieved elevations in plasma triglyceride levels, besides lipids and hepatic triacylglycerol, which were classified as hepatic steatosis. At the same time, there was a poor relationship between fractions of plasma cholesterol (HDL-c, LDL-c and VLDL-c), with increased risk of atherogenic diseases. Therefore, the cafeteria diet was able to reproduce a model of human obesity and metabolic syndrome. The animals in the cafeteria group presented oxidative stress characteristics in the hippocampus, which may compromise the function of this structure and promote behavioral changes. The CAF - S group had an anxiolytic effect due to the greater number of entrances and time spent in the center of the open field, besides greater locomotion through the greater number of quadrants traveled. CAF - S also demonstrated memory impairments assessed through the object recognition test and decreased social interaction. Such effects may be associated with changes in the serotonergic system of these animals. CAF - R demonstrated an anxiogenic effect and decreased locomotion in the open field. In the object recognition test, there was a decrease in the interaction with the objects, without, however, improving the discrimination index in relation to CAF - S. In the social interaction test, CAF - R obtained greater sociability. The results of the administration of risperidone indicate that this drug has a different effect when applied in animals that have been treated with cafeteria diet since lactation.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-19T13:28:52Z No. of bitstreams: 2 cecilia_souza_oliveira_bento.pdf: 4916321 bytes, checksum: f041b841c5abf904554cd3ebd7b483dd (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-19T13:34:47Z (GMT) No. of bitstreams: 2 cecilia_souza_oliveira_bento.pdf: 4916321 bytes, checksum: f041b841c5abf904554cd3ebd7b483dd (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-19T13:35:53Z (GMT) No. of bitstreams: 2 cecilia_souza_oliveira_bento.pdf: 4916321 bytes, checksum: f041b841c5abf904554cd3ebd7b483dd (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-19T13:35:53Z (GMT). No. of bitstreams: 2 cecilia_souza_oliveira_bento.pdf: 4916321 bytes, checksum: f041b841c5abf904554cd3ebd7b483dd (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O Brasil ? um dos pa?ses com expressiva biodiversidade e o Cerrado ? um dos seus biomas que apresenta grande diversidade de esp?cies vegetais nativas, muitas utilizadas na medicina popular e com poucos ou nenhum estudo cient?fico. Dentre essas esp?cies, destaca-se a Jacaranda caroba (Vell.) A. DC. (Bignoniaceae), conhecida popularmente como ?caroba?, ?carobinha? e ?caroba do campo?. Na medicina popular ? utilizada contra impigens, como adstringente e cicatrizante, como diur?tico, para o tratamento de infec??es, s?filis e ?lceras. Alguns estudos fitoqu?micos revelaram a presen?a de compostos fen?licos e terpen?ides na esp?cie e n?o foram publicados estudos biol?gicos sobre a mesma, at? o momento. Dessa forma, este estudo apresentou como objetivos a avalia??o da composi??o qu?mica de extratos da planta e a pesquisa dos potenciais antioxidante e alelop?tico da esp?cie. As coletas do material vegetal foram realizadas em habitat natural, no Campus JK da UFVJM, em Diamantina-MG. Nos estudos fitoqu?micos, amostras apolares foram avaliadas e os seus componentes propostos por an?lises de CG/EM, IV e RMN, indicando a prov?vel presen?a de hidrocarbonetos alif?ticos e insaturados, de cadeia linear e ramificada, cetonas, ?cidos org?nicos esterificados ou n?o (como o ?cido decan?ico), e compostos fen?licos (como a hidroquinona). Atrav?s de estudos de atividade antioxidante foi poss?vel observar que os extratos polares de folhas e flores de J. caroba apresentam compostos fen?licos com potencial antioxidante. Foi observada a atividade alelop?tica dos extratos alco?lico e hidroalco?lico de flores e folhas de J. caroba sobre a germina??o de sementes e o crescimento ou desenvolvimento de vegetais. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Brazil is a country with significant biodiversity and is one of its Cerrado biomes that presents great diversity of native plant species, many used in folk medicine and with little or no scientific study. Among these species, there is the Jacaranda carob (Vell.) A. DC. (Bignoniaceae), popularly known as "carob", "carobinha" and "carob field." In folk medicine against impigens is used as astringents and wound healing, as a diuretic for the treatment of infections, syphilis and ulcers. Some phytochemical studies revealed the presence of phenolic compounds and terpenoids in kind and not biological studies have been published about the same so far. Thus, this study had as objective to evaluate the chemical composition of plant extracts and antioxidant potential survey and allelopathic species. The samples of plant material were carried out in natural habitat, in the Campus JK UFVJM in Diamantina-MG. In phytochemical studies, samples were evaluated and nonpolar components analysis proposed by GC / MS, IR and NMR, indicating the likely presence of aliphatic and unsaturated, straight chain and branched ketones, organic acids, esterified or not (such as decanoic acid) and phenolic compounds (such as hydroquinone). Through studies of antioxidant activity was observed that the polar extracts of leaves and flowers of J. caroba present phenolic compounds with antioxidant potential. Was observed allelopathic activity of alcoholic and hydroalcoholic extracts of flowers and leaves J. carob seeds on germination and the growth or development of plants.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:04:51Z No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:05:17Z (GMT) No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:05:35Z (GMT) No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-23T13:05:35Z (GMT). No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / As turfeiras s?o importantes reguladores dos fluxos de ?gua e de elementos, principalmente do carbono, entre os compartimentos terrestres e aqu?ticos. O objetivo deste trabalho foi caracterizar qualiquantitativamente os Organossolos e os recursos h?dricos das turfeiras das cabeceiras do Rio Ara?ua? quanto ? disponibilidade h?drica e a din?mica do carbono no sistema solo-?gua. Coletou-se oito testemunhos representantes de quatro perfis de solo do Campo Limpo ?mido e Floresta Estacional Semidecidual de duas turfeiras nas cabeceiras de afluentes do Rio Ara?ua? (C?rrego Cachoeira dos Borges e Rio Preto), descritos e caracterizados f?sica, qu?mica, elementar e morfologicamente. Em tr?s pontos do curso d??gua de cada afluente e duas ?pocas (chuvosa e seca) foram coletadas amostras de ?gua e analisados os seus atributos f?sicos e qu?micos. Procedeu-se o mapeamento das turfeiras e o c?lculo dos volumes e fluxos de ?gua e de carbono. Empregou-se an?lise de vari?ncia para atestar o efeito das fitofisionomias, profundidades de amostragem e das intera??es destes fatores sobre as vari?veis do solo. Para os atributos da ?gua atestaram-se efeitos dos locais (afluentes), ?pocas de amostragem e das intera??es entre estes fatores. Boa parte dos atributos caracterizadores da mat?ria org?nica e a composi??o elementar do solo apresentaram diferen?as significativas entre os locais, fitofisionomias e profundidades de amostragem e variaram em fun??o da composi??o e grau de evolu??o do material org?nico. A maioria dos atributos f?sico-qu?micos das ?guas n?o diferenciou entre os locais e nem entre as ?pocas, mas foram influenciados pelos atributos dos Organossolos de onde se originam. A turfeira do Rio Preto estoca 4.299,39 t de C (206,70 t ha-1) e 227.258,15 m3 de ?gua (10.925,87 m3 ha-1) e a turfeira do C?rrego Cachoeira dos Borges estoca 14.781,09 t de C (184,10 t ha-1) e 745.950,30 m3 de ?gua (9.290,70 m3 ha-1). A vaz?o do Rio Preto foi de 0,023 m3 s-1 e do C?rrego Cachoeira dos Borges foi de 0,067 m3 s-1 no per?odo chuvoso. No per?odo seco estes cursos d??gua apresentaram vaz?o m?nima constante, demonstrando a capacidade das turfeiras de suas cabeceiras de perenizar a vaz?o. Estimou-se o lan?amento de uma carga m?dia de 360,84 t ano-1 de N e 6.812,73 t ano-1 de C e de 917,32 t ano-1 de N e 33.516,16 t ano-1 de C, respectivamente para o Rio Preto e C?rrego Cachoeira dos Borges. As turfeiras das cabeceiras dos afluentes do Rio Ara?ua? influenciam significativamente na vaz?o e na qualidade de suas ?guas, sendo urgente a necessidade de preserva??o destes pedoambientes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT The peatlands are important regulators of water flows and elements between terrestrial and aquatic compartments, especially of the carbon. The objective of this study was to characterize qualitatively and quantitatively the Histosols and water resources of headwater from peatlands of the Rio Ara?ua? as to hydric availability and carbon dynamics in the soil-water system. Been collected eight testimonies representatives from four soil profiles of moist meadow and semi-deciduous seasonal forest in two peatlands in the headwaters of affluents of the Rio Ara?ua? (C?rrego Cachoeira dos Borges e Rio Preto), described and characterized physics, chemistry, elementary and morphologically. In three points of each watercourse affluent and two seasons (wet and dry) water samples were collected and analyzed their physical and chemical attributes. Been done the mapping of peatlands and the calculation of volumes and flows of water and carbon. It was used analysis of variance to attested effect of vegetation types, sampling depths and the interactions of these factors over soil variables. For the attributes of water attested effects of local (affluents), sampling periods and the interactions between these factors. Much of the attributes that characterize the organic matter and elemental composition of the soil, showed significant differences between the sites, vegetation types and depths of sampling and varied according to the composition and degree of evolution of the organic material. Most physical and chemical attributes of the water did not differ between the sites and between sampling periods, but were influenced by the attributes of the Histosols of where they originate. The peatland from Rio Preto stocks 4,299.39 tons of C (206.70 tons ha-1) and 227,258.15 m3 (10,925.87 m3 ha-1) of water and peatland from the C?rrego Cachoeira dos Borges stocks 14,781.09 tons of C (184.10 tons ha-1) and 745.950,30 m3 (9.290,70 m3 ha-1) of water. The flow of water of the Rio Preto was 0.023 m3 s-1 and of the C?rrego Cachoeira dos Borges was 0.067 m3 s-1 in the rainy season. These watercourses showed constant minimum flow in the dry season, demonstrating the capacity of peatlands its headwaters to maintain water flow. It has been estimated the launch of a load average of 360.84 tons year-1 of N and 6812.73 tons year-1 of C and of 917.32 tons year-1 of N and 33516.16 tons year-1 of C respectively for the Rio Preto and C?rrego Cachoeira dos Borges. The peatlands from the headwaters of the affluents of the Rio Ara?ua? have a significant influence the flow and quality of its waters, and the urgent need to preservation these pedological environments.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-05T18:30:52Z No. of bitstreams: 2 paulo_henrique_rodrigues_santos.pdf: 1801818 bytes, checksum: 0e1fea2c79f25949d26ac2b640544519 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-05T18:31:28Z (GMT) No. of bitstreams: 2 paulo_henrique_rodrigues_santos.pdf: 1801818 bytes, checksum: 0e1fea2c79f25949d26ac2b640544519 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-05T18:31:47Z (GMT) No. of bitstreams: 2 paulo_henrique_rodrigues_santos.pdf: 1801818 bytes, checksum: 0e1fea2c79f25949d26ac2b640544519 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-01-05T18:31:47Z (GMT). No. of bitstreams: 2 paulo_henrique_rodrigues_santos.pdf: 1801818 bytes, checksum: 0e1fea2c79f25949d26ac2b640544519 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo deste trabalho foi estudar os efeitos da fertiliza??o, do arranjo no espa?amento e da idade na produ??o de biomassa, na qualidade silvicultural e avalia??o econ?mica de um povoamento clonal de eucalipto. Foi instalado um experimento em ?reas do grupo Gerdau, no munic?pio de Tr?s Marias ? MG, utilizando o delineamento experimental em blocos ao acaso com esquema em faixas. Os tratamentos estudados, parcelas convencionais, consistiram de 15 fertiliza??es comerciais adotadas operacionalmente por empresas florestais, instaladas no estado de Minas Gerais. Nas subparcelas foram testados dois arranjos, 3,0 x 3,0 m e 6,0 x 1,5 m. As medi??es ocorreram aos 12, 24, 27, 36 e 48 meses. A partir das informa??es coletadas em campo, foram estimados para cada tratamento a biomassa por hectare, ?ndice de ?rea foliar, serrapilheira, al?m de outras vari?veis dendrom?tricas e de povoamento. Foi realizado o monitoramento da qualidade silvicultural na fase inicial de desenvolvimento da floresta por meio da vari?vel dendrom?trica de interesse das 50% menores ?rvores plantadas (Pvar50%). Realizou-se a avalia??o econ?mica com base na varia??o no custo da fertiliza??o de cada empresa e venda da madeira aos 48 meses. Verificou-se intera??o significativa nos valores de altura total e biomassa de tronco aos 12, 24, 36 e 48 meses, para di?metro m?dio e ?rea basal aos 12, 24 e 48 meses e biomassa de folha e galho aos 12 e 24 meses. Aos 27 meses apenas di?metro de copa e teor de clorofila obtiveram intera??o significativa e aos 36 meses altura total, altura de fuste, di?metro de copa e teor de clorofila foram significativos ? intera??o entre fertiliza??o e arranjo. ? medida que ocorre o desenvolvimento da floresta, o efeito da fertiliza??o vai se tornando menos pronunciado em rela??o ? produ??o de biomassa. Portanto, al?m da quantidade aplicada deve-se atentar para a propor??o entre os nutrientes aplicados. O crescimento em biomassa de tronco por hectare apresentou rela??o direta com os teores de clorofila e ?ndices de ?rea foliar. De forma geral, os tratamentos n?o influenciaram a uniformidade e o Pvar50 se mostrou adequado. O tratamento 1 (2000kg de agrosil?cio, 400kg de fosfato reativo, 130kg de 04:26:16+0,5%Cu+0,5%Zn e 150kg de KCl+1%B por hectare) no arranjo 3,0 x 3,0 m mostrou-se como a op??o mais atrativa segundo os crit?rios econ?micos avaliados, mesmo que ainda n?o esteja no ciclo final de corte da floresta. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT The aim of this work was to study the fertilization effects, the arrangement on the spacing and the age on biomass production in silvicultural quality and economic evaluation of a clonal eucalyptus plantation. The experiment was conducted in Gerdau Group?s area, in Tr?s Marias - MG, using the experimental design randomised complete block with strip scheme. The treatments, which were studied, conventional commercial fertilization adopted operationally by 15 forestry companies, located in the Minas Gerais state. In the subplots two arrangements were tested, 3.0 x 3.0 m and 6.0 x 1.5 m. The measurements were performed at 12, 24 , 27 , 36 and 48 months. From the information collected in the field, were estimated for each treatment per hectare biomass, leaf area index, litterfall, and other variables dendrometric and stand. The monitoring of silvicultural quality was performed at the initial stage of forest development through dendrometric variable interest 50 % smallest trees planted (Pvar50 %). The economic evaluation was conducted based on the variation from fertilization cost of each company and the timber sale at 48 months. Was verified a significant interaction in the values of total height and truck biomass at 12, 24 , 36 and 48 months, average diameter and basal area at 12, 24 , and 48 months, leaf biomass and branches at 12 and 24 months. On the 27th months only canopy diameter and chlorophyll content had significant interaction and at 36 months total height, bole height, crown diameter and chlorophyll content had significant interaction between fertilization and arrangement. As forest development occurs, the fertilizing effect becomes less pronounced in relation to biomass production. So, besides the amount applied should pay attention to the proportion of the applied nutrients . The increase in truck biomass per hectare showed a direct relationship with the chlorophyll content and leaf area index . In general, the treatments did not affect the uniformity and Pvar50 was adequate. Treatment 1 (agrosil?cio of 2000kg , 400kg of reactive phosphate , 04:26:16 130kg of Cu +0.5 % +0.5 % Zn and 150 kg KCl +1 % B per hectare) 3.0 x 3.0 meters arrangement proved to be the most attractive option according to economic evaluation criteria , even if it is not already in the final cycle of forest cutting .

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:53Z No. of bitstreams: 5 15.pdf: 1451318 bytes, checksum: bf4c447fee881cbe87b63b4eb3d3037e (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T11:20:27Z (GMT) No. of bitstreams: 5 15.pdf: 1451318 bytes, checksum: bf4c447fee881cbe87b63b4eb3d3037e (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-10T11:20:27Z (GMT). No. of bitstreams: 5 15.pdf: 1451318 bytes, checksum: bf4c447fee881cbe87b63b4eb3d3037e (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Trabalhos que avaliam os aspectos t?cnicos e econ?micos do processo produtivo da cultura do eucalipto praticada pelos produtores rurais no Alto Jequitinhonha, regi?o que possui uma das maiores ?reas plantadas com essa esp?cie no estado de Minas Gerais, s?o pouco frequentes. A participa??o de Produtores Rurais (PR) tem se destacado nos ?ltimos anos e socializa uma atividade ent?o praticada predominantemente por grandes empresas florestais, fato este que suporta a escassez de trabalhos direcionados para produ??o em menor escala. Este estudo objetivou avaliar as pr?ticas de silvicultura empregadas pelos PR tendo como refer?ncia as pr?ticas adotadas por uma empresa que utiliza em seus plantios as melhores tecnologias silviculturais; estimar os custos de forma??o e condu??o de florestas conforme os procedimentos empregados pelos produtores em rela??o a diferentes op??es tecnol?gicas; e analisar o retorno de investimentos estimados sob crit?rios econ?micos. A popula??o abrangida neste estudo correspondeu a 583 PR do Alto Jequitinhonha que apresentaram Declara??es de Colheita e Comercializa??o no Instituto Estadual de Florestas entre janeiro de 2008 e outubro de 2009. Neste universo, 71 PR foram escolhidos aleatoriamente para responder um formul?rio com perguntas que abordaram a origem do material gen?tico, espa?amento, rota??o, todas as pr?ticas de silvicultura, a colheita e comercializa??o da madeira adotada. Estas mesmas vari?veis foram avaliadas em uma grande empresa florestal instalada na regi?o que trabalha com as melhores pr?ticas silviculturais. Ap?s obtidos, os dados foram analisados pela estat?stica descritiva. Os PR do Alto Jequitinhonha t?m significativa ?rea plantada com Eucalyptus urophylla e E. cloesiana, entretanto a tecnologia de silvicultura adotada ? obsoleta em rela??o ?s tecnologias empregadas por grandes empresas. Consequentemente, reduzem-se o potencial produtivo dos s?tios florestais e o retorno econ?mico. De forma geral a madeira de eucalipto ? direcionada para produ??o de carv?o vegetal. A tecnologia utilizada pelos produtores rurais na regi?o de estudo n?o ofereceu os melhores resultados econ?micos em qualquer dos cen?rios de pre?os estudados quando comparadas com a tecnologia utilizada pela empresa que utiliza elevado n?vel tecnol?gico. Devido ?s suas propriedades tecnol?gicas e ao uso pelo mercado madeireiro, a melhor viabilidade econ?mica para a madeira do E. cloesiana ? sua comercializa??o para a produ??o de postes de cerca, mour?es e para a constru??o civil. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT Studies evaluating the technical processes of eucalyptus plantation by small and medium forest farmers at Alto Jequitinhonha region, in the northeast part of the state of Minas Gerais, are rare, even though this state has one of the largest eucalyptus areas in Brazil. The participation of farmers has been prominent in recent years, increasing the social benefits of eucalyptus plantation, as it had been traditionally planted by large forest companies so far. This study aimed to evaluate the forestry practices employed by these farmers in comparison to the best practices adopted by traditional companies, by estimating cost x benefit relation of forestry as a complementary business, based on the procedures carried out by these farmers under different technological options. The population covered by this study was represented by 583 farmers from Alto Jequitinhonha, who registered a document called ?Harvest statement?, as required by the state agency ?Instituto Estadual de Florestas?, between January 2008 and October 2009. From these, 71 farmers were randomly selected to answer a questionnaire addressing data such as the origin of species, spacing, rotation, the main silvicultural practices, harvesting and commercialization strategies employed. The same variables from a large regional forestry company were evaluated and used as reference. Data collected was analyzed by using descriptive statistics. It was found that farmers of Alto Jequitinhonha owns a very significant planted area with Eucalyptus urophylla and E. Cloesiana, although they employ much lower technological level in comparison to the technologies used by the large company. In consequence, the potential yield in these sites is reduced. In general, the eucalyptus wood is intended for charcoal production. The technology used by farmers in the study area did not offer the best economic results in any of the price scenarios studied, when compared to the company used as reference. E. cloesiana showed a better economic return, due to its technological properties and better acceptance into the local market, for lamp posts, fence posts and overall use in civil construction.