Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-02-15T14:44:04Z No. of bitstreams: 1 TelmaElitaDaSilva_DISSERT.pdf: 1976811 bytes, checksum: e6985750f6c657864020ee3c864ed44e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-02-20T23:11:16Z (GMT) No. of bitstreams: 1 TelmaElitaDaSilva_DISSERT.pdf: 1976811 bytes, checksum: e6985750f6c657864020ee3c864ed44e (MD5) / Made available in DSpace on 2018-02-20T23:11:16Z (GMT). No. of bitstreams: 1 TelmaElitaDaSilva_DISSERT.pdf: 1976811 bytes, checksum: e6985750f6c657864020ee3c864ed44e (MD5) Previous issue date: 2017-12-01 / Considerando a import?ncia do processo de orienta??o acad?mica para a melhoria dos resultados alcan?ados pelos cursos de gradua??o presenciais na UFRN, buscou-se analisar como se d?o as pr?ticas de orienta??o acad?mica no CCSA/UFRN em rela??o ao prescrito para esse processo na UFRN. Para tanto, entrevistamos sete coordenadores de curso e nove orientadores acad?micos, representando assim, todos os cursos de gradua??o presenciais do CCSA. O tratamento das informa??es foi realizado por meio da an?lise de conte?do de Bardin (2011) e pelo Software IRaMuTeQ. A an?lise de conte?do revelou as categorias: Doc?ncia Universit?ria / Orienta??o Acad?mica / Gest?o Acad?mica. E o IRaMuTeQ identificou tr?s classes: Agentes da Orienta??o Acad?mica / Funcionamento da Orienta??o Acad?mica / O Papel do Docente Universit?rio. Tais categorias e classes revelaram a rela??o entre o que est? prescrito e o que ? praticado na orienta??o acad?mica nos Cursos de Gradua??o Presenciais do CCSA/UFRN. O que permitiu concluir que: a orienta??o acad?mica ? um processo hist?rico institu?do desde 1975 pela Resolu??o 110/75-CONSEPE, de 19 de setembro de 1975, contrariando, assim, o pressuposto institucional de sua inexist?ncia, revelada pelo documento ?Indicadores Acad?micos da Expans?o na UFRN ? An?lise e Encaminhamentos?; a exist?ncia de um movimento identit?rio entre o que ? o fazer do docente universit?rio prescrito na norma e as exig?ncias para atuar no ensino superior no cen?rio atual; bem como, a exist?ncia de elementos de planejamento que podem ser somados ?s sugest?es dos participantes para a constru??o de a??es de interven??o para melhorias dos cursos, o que configura esse trabalho como uma disserta??o diagn?stica. / Considering the importance of academic advising process on the improvement of the results achieved by undergraduate courses at UFRN, it was sought to analyse academic advising practices as they actually happen at CCSA/UFRN in comparison to what was prescribed for this process in UFRN regulation. In order to do so, we interviewed seven course coordinators and nine academic advisors, representing, thus, all CCSA presential undergraduate courses. The information treatment was performed through the content analysis of Bardin (2011) and the IRaMuTeQ Software. Content analysis revealed the categories: University Teaching / Academic Advising / Academic Management. And IRaMuTeQ identified three classes: Academic Advising Agents / Academic Advising Operation / The Role of University Teachers. These categories and classes revealed the relationship between what is prescribed and what is practiced in the academic advising in the CCSA / UFRN presential undergraduate courses. This led to the conclusion that: academic advising is a historical process established since 1975 by Resolu??o 110/75-CONSEPE [a resolution by UFRN legislative body] of 19 of September 1975, contradicting so the institutional presupposition of its non-existence, revealed by the document "Indicadores Acad?micos da Expans?o na UFRN ? An?lise e Encaminhamentos". Also that there is an identity movement between the role of the university professor prescribed in the norm and the requirements to act in higher education in the current scenario. As well as, there are planning elements that might be added to the participants? suggestions for elaboration of intervention actions for courses improvement, which configures this work as a diagnostic dissertation.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-04T16:02:48Z No. of bitstreams: 1 MarioViniciusDeLimaPereira_DISSERT.pdf: 912805 bytes, checksum: f73b84ad09c1054fc9c898f9bc4b9249 (MD5) / Approved for entry into archive by Monica Paiva (monicalpaiva@hotmail.com) on 2017-04-04T16:15:42Z (GMT) No. of bitstreams: 1 MarioViniciusDeLimaPereira_DISSERT.pdf: 912805 bytes, checksum: f73b84ad09c1054fc9c898f9bc4b9249 (MD5) / Made available in DSpace on 2017-04-04T16:15:42Z (GMT). No. of bitstreams: 1 MarioViniciusDeLimaPereira_DISSERT.pdf: 912805 bytes, checksum: f73b84ad09c1054fc9c898f9bc4b9249 (MD5) Previous issue date: 2015-10-19 / Com o envelhecimento da estrutura populacional do Brasil gerado pelos efeitos da Transi??o Demogr?fica que vem ocorrendo no pa?s, faz-se importante conhecer os aspectos sociodemogr?ficos da popula??o idosa que ter?, cada vez mais, maior expressividade na popula??o, e que, possuindo algum n?vel de defici?ncia motora, exigir? mais recursos e servi?os de sa?de, moradia, emprego e outros, espec?ficos para esta idade peculiar. O nordeste Brasileiro, em particular, ? a regi?o com a maior taxa de idosos com alguma defici?ncia motora. Dessa forma, a an?lise do perfil sociodemogr?fico desses idosos no Nordeste em 2010, constitui-se em refer?ncia importante para defini??o de pol?ticas p?blicas votadas para essa parcela da popula??o. Neste trabalho, apresenta-se uma an?lise descritiva de dados do Censo Demogr?fico Brasileiro de 2010, do Instituto Brasileiro de Geografia e Estat?stica (IBGE), com vistas a analisar o perfil sociodemogr?fico dos idosos com defici?ncia ou incapacidade motora na regi?o Nordeste do Brasil. A amostra foi constitu?da de idosos com 60 anos ou mais de idade residentes na regi?o, que representa 26,48% da popula??o brasileira de idosos. A vari?vel dependente utilizada na an?lise relaciona-se ? defici?ncia motora, mensurada pela dificuldade ou impossibilidade em caminhar ou subir degraus, enquanto as vari?veis independentes est?o relacionadas ? caracter?sticas individuais e domiciliares, respectivamente, demografia, socioeconomia, emprego e, tipos de domic?lios, localiza??o e depend?ncias. A partir de an?lises estat?sticas determinou-se as correla??es entre algumas vari?veis espec?ficas para o nordeste brasileiro e seus efeitos na defici?ncia motora dos idosos. Foram tamb?m analisadas as raz?es de chances para a defici?ncia motora nesta popula??o alvo. Os resultados mostraram que, em n?vel individual, o sexo, estado civil, a renda, o n?vel de instru??o foram os fatores mais fortemente relacionados com idosos com alguma defici?ncia motora, enquanto que, em n?vel domiciliar, o n?mero de banheiros, esp?cie de domicilio, situa??o de domic?lio e densidade morador/domic?lio, exibiram uma importante correla??o com a vari?vel dependente. Os resultados mostram, sem sombra de d?vida, que a ado??o de pol?ticas p?blicas voltadas ? assist?ncia ao idoso de modo a auxili?-los a superar as dificuldades associadas ? defici?ncia motora, podem cooperar significativamente para seu bem-estar e, consequentemente, para a melhoria da sua qualidade de vida.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T21:15:21Z No. of bitstreams: 1 RenanDaCostaOliveira_DISSERT.pdf: 7111395 bytes, checksum: 623f2ac2cda2fc27ac0ceda280b46337 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-07T22:14:15Z (GMT) No. of bitstreams: 1 RenanDaCostaOliveira_DISSERT.pdf: 7111395 bytes, checksum: 623f2ac2cda2fc27ac0ceda280b46337 (MD5) / Made available in DSpace on 2017-04-07T22:14:15Z (GMT). No. of bitstreams: 1 RenanDaCostaOliveira_DISSERT.pdf: 7111395 bytes, checksum: 623f2ac2cda2fc27ac0ceda280b46337 (MD5) Previous issue date: 2016-08-29 / A ?rea de estudo localiza-se na regi?o do munic?pio de Bara?na-RN, extremo oeste do Estado do Rio Grande do Norte. Abrange uma superf?cie de 675 Km?, incluindo o Munic?pio de Bara?na, e parte dos munic?pios de Quixer?-CE e Mossor?-RN. O aqu?fero Janda?ra constitui a unidade hidrogeol?gica objeto deste trabalho. Trata-se de um aqu?fero de rochas carbon?ticas utilizado no suprimento h?drico da popula??o urbana (Bara?na) e rural, principalmente da fruticultura irrigada. O objetivo do trabalho ? avaliar o comportamento hidrogeol?gico do aq??fero c?rstico Janda?ra, verificar suas condi??es de utiliza??o, avaliar o car?ter de fluxo subterr?neo, propor o modelo conceitual, al?m de responder a questionamentos sobre o rebaixamento dos n?veis de ?gua. Para isso, foi realizado o levantamento dos dados existentes para a ?rea, a elabora??o de mapas e interpreta??o de imagens, a elabora??o de perfis de po?os, o levantamento de par?metros hidrodin?micos, a avalia??o do fluxo subterr?neo, a avalia??o de recarga e gera??o do modelo conceitual esquem?tico. Com base em dados existentes, a ?rea foi subdividida em tr?s zoneamentos quanto a carstifica??o e identificados por m?todos geof?sicos e esquematizado no modelo conceitual com o auxilio de mapas de estruturas, perfis de po?os e identifica??o de carstes na regi?o. A ?rea possui forte explota??o das ?guas do aqu?fero Janda?ra com utiliza??o principalmente na fruticultura irrigada como mostrou o estudo de utiliza??o das ?guas na regi?o. Tamb?m foram elaboradas as estimativas de reservas com base na varia??o de n?vel da ?gua em po?os selecionados. Os estudos referentes ao fluxo subterr?neo mostraram uma tend?ncia natural de fluxo na dire??o SW-NE, por?m a forte influ?ncia da explota??o das ?guas provocou uma converg?ncia para o setor central da ?rea. A constru??o do modelo conceitual esquem?tico visou identificar as diferentes estruturas apresentadas pelo aqu?fero na regi?o, mostrando a varia??o no desenvolvimento c?rstico. O c?lculo de recarga mostrou o alto potencial do aqu?fero Janda?ra, com rendimento m?dio de 45%, a an?lise dos registros de chuvas e n?veis est?ticos mostrou que a causa para o rebaixamento das ?guas subterr?neas possui dois fatores importantes: a forte explota??o das ?guas aliada as secas prolongadas. / The study area is located in the region of Bara?na-RN city, extreme West of the State of Rio Grande do Norte. It covers an area of 675 square kilometers, including the Municipality of Bara?na, and part of the municipalities of Quixer?-CE and Mossoro-RN. The Janda?ra aquifer constitutes the hydrogeological unit and it is the object of this work. It is an aquifer of carbonate rocks used in the water supply of urban and rural population, mainly of the irrigated fruit-growing. The objective of this work is to evaluate the hydrogeological behavior of the Janda?ra karst aquifer, to verify its conditions of use, to evaluate the underground flow character, to propose the conceptual model, and to answer questions about the lowering of water levels. For this, was performed the survey of the existing data for the area, the elaboration of maps and interpretation of images, the elaboration of well profiles, the hydrodynamic parameters survey, the underground flow evaluation, the recharge evaluation and generation of the model conceptual schematic. Based on existing data, the area was subdivided into three zoning for karstfication and identified by geophysical methods and schematized in the conceptual model with the aid of structure maps, well profiles and identification of karst in the region. The area has strong exploitation of the water of the Janda?ra aquifer with use mainly in irrigated fruit-growing as shown by the study of water use in the region. Also were prepared the reserves estimates based on the water level variation in selected wells. The related studies to underground flow showed a natural flow tendency in the SW-NE direction, but the strong influence of the water exploitation caused a convergence for the central sector of the area. The construction of the conceptual schematic model aimed to identify the different structures presented by the aquifer in the region, showing the variation in karstic development. The recharge calculation showed the high potential of the Janda?ra aquifer, with an average yield of 45%, the analysis of rainfall records and static levels showed that the cause for groundwater retraction has two important factors: The strong exploitation of the waters combined with the prolonged droughts.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-04T20:38:58Z No. of bitstreams: 1 DanieleDeSouzaMarinhoDoNascimento_DISSERT.pdf: 2192295 bytes, checksum: 73b11671b4d2ac4a205f4fba79f5180a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-06T19:07:23Z (GMT) No. of bitstreams: 1 DanieleDeSouzaMarinhoDoNascimento_DISSERT.pdf: 2192295 bytes, checksum: 73b11671b4d2ac4a205f4fba79f5180a (MD5) / Made available in DSpace on 2017-09-06T19:07:23Z (GMT). No. of bitstreams: 1 DanieleDeSouzaMarinhoDoNascimento_DISSERT.pdf: 2192295 bytes, checksum: 73b11671b4d2ac4a205f4fba79f5180a (MD5) Previous issue date: 2017-06-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A obesidade ? considerada um importante problema de sa?de p?blica, sendo um fator de risco para v?rias doen?as cr?nicas como doen?as cardiovasculares, hipertens?o, diabetes e outras. A Baccharis trimera (Less.) DC, conhecida popularmente como carqueja, ? uma planta medicinal utilizada na medicina tradicional em v?rias partes do Brasil. Para tal, infus?es, decoc??es e tinturas de suas folhas s?o produzidas e utilizadas para o tratamento da obesidade, diabetes, assim como diur?ticos, agentes digestivos, antiinflamat?rios, dentre outros. Neste trabalho, com intuito de respaldar o potencial medicinal da carqueja, extratos de folhas de Baccharis trimera foram obtidos, caracterizados qu?mica e fitoquimicamente e avaliados com rela??o ? sua atividade antioxidante e antiadipog?nica. Foram obtidos tr?s extratos: aquoso (AE), decoco (AE-D) e metan?lico (ME); a partir destes, foram realizados seis diferentes ensaios antioxidantes in vitro: ensaio do radical super?xido e hidroxila, poder redutor, capacidade antioxidante total e quela??o dos ?ons ferro e cobre. Bem como, foi avaliada sua poss?vel atividade antiadipog?nica com os testes de oil red O, glicerol livre e mensura??o de fatores de transcri??o adipog?nicos C/EBP?, C/EBP? e PPAR?. Na caracteriza??o fitoqu?mica, revelou-se a presen?a de flavonoides (?cido clorog?nico e apigenina) e compostos fen?licos nos extratos AE e AE-D. Quanto a atividade antioxidante, verificou-se uma atividade dose-dependente. Em rela??o ? atividade antiadipog?nica, a Baccharis trimera inibiu significantemente tanto a diferencia??o e ac?mulo de gordura nos adip?citos pelo MDA, quanto a express?o dos fatores de transcri??o C/EBP?, C/EBP? e PPAR?, durante a adipog?nese todas em rela??o dose-dependente. Este trabalho sugere que Baccharis trimera possui ?tima atividade antioxidante, prevenindo o estresse oxidativo, podendo contribuir para a diminui??o da adipog?nese, al?m de possuir ?tima atividade antiadipog?nica. Este foi o primeiro trabalho que demonstrou o potencial efeito de extratos de Baccharis trimera na diferencia??o de adip?citos 3T3-L1 em adip?citos. / Obesity is considered an important public health problem, being a risk factor for several chronic diseases such as cardiovascular diseases, hypertension, diabetes and other. Baccharis trimera (Less.) DC (carqueja) is a medicinal plant used in traditional medicine in various parts of Brazil. Infusions, decoctions and tinctures of its leaves are produced and used for the treatment of obesity and diabetes, and also as diuretics, digestive agents, anti-inflammatory drugs, among others. In this work, in order to support the medicinal potential of carqueja, extracts of Baccharis trimera leaves were obtained, characterized chemically and phytochemically and evaluated in relation to their antioxidant and antiadipogenic activities. Three extracts were obtained: aqueous (AE), decoco (AE-D) and methanolic (ME); From these, six different in vitro antioxidant assays were performed: superoxide and hydroxyl radical assay, reducing power, total antioxidant capacity and chelation of iron and copper ions. As well, its possible antiadipogenic activity was evaluated with oil red O, free glycerol and measurement of adipogenic transcription factors C / EBP?, C / EBP? and PPAR?. Phytochemical characterization revealed the presence of flavonoids (chlorogenic acid and apigenin) and phenolic compounds in extracts AE and AE-D. As for the antioxidant activity, a dose-dependent activity was observed. Regarding antiadipogenic activity, Baccharis trimera significantly inhibited the differentiation and accumulation of fat in adipocytes by MDA in a dose-dependent relationship and significantly reduced the expression of the transcription factors C / EBP?, C / EBP? and PPAR?, during adipogenesis in a relation dose-dependent too. This work suggests that Baccharis trimera has an excellent antioxidant activity, preventing oxidative stress, and may contribute to the decrease of adipogenesis, besides having an excellent antiadipogenic activity. This was the first work that demonstrated the potential effect of Baccharis trimera extracts on the differentiation of 3T3-L1 adipocytes into adipocytes.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-01T21:56:19Z No. of bitstreams: 1 ThecyusBenicioNunesDeMelo_DISSERT.pdf: 2509067 bytes, checksum: 7379b33b5f03cefaa1b0aeead7eda33c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-08T22:13:02Z (GMT) No. of bitstreams: 1 ThecyusBenicioNunesDeMelo_DISSERT.pdf: 2509067 bytes, checksum: 7379b33b5f03cefaa1b0aeead7eda33c (MD5) / Made available in DSpace on 2017-11-08T22:13:02Z (GMT). No. of bitstreams: 1 ThecyusBenicioNunesDeMelo_DISSERT.pdf: 2509067 bytes, checksum: 7379b33b5f03cefaa1b0aeead7eda33c (MD5) Previous issue date: 2016-07-22 / Este trabalho apresenta os aspectos estruturais e organizacionais relacionados ao desenvolvimento do processo de transfer?ncia de tecnologia no contexto universit?rio. Nesse sentido, s?o evidenciadas as formas e os mecanismos de intera??o universidade-empresa, avalia??o das barreiras e identifica??o dos fatores, motiva??es e benef?cios dos participantes. Com base nessa investiga??o, o estudo tem como objetivo geral avaliar as barreiras existentes nos projetos acad?micos direcionados ? transfer?ncia de tecnologia, identificando vari?veis cr?ticas e propondo melhorias ao processo. A pesquisa foi desenvolvida com a utiliza??o de um estudo de caso que contemplou como amostra a Universidade Federal do Rio Grande do Norte. No procedimento metodol?gico de avalia??o das barreiras foi utilizado como ferramenta a escala de Likert e a t?cnica de An?lise de Componentes Principais (ACP). A amostra da pesquisa consistiu em 36 projetos acad?micos de 2013 a 2015, selecionados de forma aleat?ria para aplica??o de question?rio. O question?rio foi dividido em duas etapas: a primeira etapa cont?m 9 quest?es que procuram conhecer o perfil do coordenador, j? a segunda etapa contou com 30 afirma??es sobre as barreiras relacionadas ao processo de transfer?ncia de tecnologia para avalia??o dos entrevistados. Os resultados possibilitaram conhecer as barreiras mais cr?ticas em torno do processo de transfer?ncia de tecnologia que s?o: a burocracia institucional excessiva, a aus?ncia de cultura de comercializa??o da pesquisa, a burocracia governamental e a falta de agilidade e cumprimento dos prazos estabelecidos na elabora??o dos projetos. A partir da avalia??o das barreiras tamb?m foi poss?vel propor melhorias ao processo na UFRN como: a implementa??o de um projeto de extens?o continuo de apoio a melhorias no processo de transfer?ncia de tecnologia, disponibiliza??o de uma plataforma multiusu?rio englobando os resultados dos mecanismo de intera??o desenvolvidos na universidade, altera??es especificas em resolu??es e controles internos e defini??o de pol?tica dos ?rg?os de fomento ? inova??o na UFRN. / This paper presents the structural and organizational aspects related to the development of the technology transfer process in the university context. In this sense, it is evidenced the forms and mechanisms of interaction university-industry, evaluation of barriers and identification of factors, motivations and benefits of participating. Based on this research, the study has the general objective to evaluate existing barriers in academic projects directed to the transfer of technology, identifying critical variables and proposing improvements to the process. The research was conducted with the use of a case study, which had as sample the Federal University of Rio Grande do Norte. In the methodological procedure for the assessment of the barriers was used the scale tool Likert and Principal Component Analysis (PCA). The survey sample consisted of 36 academic projects from 2013 to 2015, randomly selected for the questionnaire. The questionnaire was divided into two stages: the first stage contains 9 questions seeking to know the coordinator of the profile, while the second step included 30 statements about the barriers related to technology transfer process for the interviews. The results made it possible to know the most critical barriers surrounding the technology transfer process, which are the excessive institutional bureaucracy, lack of search marketing culture, government bureaucracy and the lack of flexibility and meeting the deadlines set in the preparation of projects. From the assessment of the barriers was also possible to propose improvements to the process in UFRN as: the implementation of a continue extension project to support improvements in the technology transfer process, providing a multiuser platform encompassing the results of the interaction mechanism developed in university, specific changes in resolutions and internal controls and policy setting of agencies for innovation in UFRN.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-06-27T14:38:40Z No. of bitstreams: 1 2010 - Adierson Gilvani Ebeling.pdf: 3744657 bytes, checksum: 0458139e287a489573818b522e4c02de (MD5) / Made available in DSpace on 2017-06-27T14:38:40Z (GMT). No. of bitstreams: 1 2010 - Adierson Gilvani Ebeling.pdf: 3744657 bytes, checksum: 0458139e287a489573818b522e4c02de (MD5) Previous issue date: 2010-08-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasil. / The Histosols have a small geographic extension in the Brazilian territory; however, they are intensively used in family agriculture systems and have a great environmental importance. The drainage of Histosols leads to the subsidence process and other changes in the soil organic matter (SOM), with consequences in their characteristics and potential. The nature of humic substances (HSs) is determinant in the alterations of the Histosols. The characterization of the HSs allows the understanding of processes of SOM transformation in the Histosols, and their environmental impact. The objectives of this study were: to characterize Histosols from different environments and land usage intensity; and to evaluate alterations in humic fractions of SOM, by using elemental composition analyses, spectroscopic, thermal degradation, and nuclear magnetic resonance (NMR) techniques. The study was developed in eight Histosols, from the States of Rio de Janeiro, Maranh?o and Paran?, in Brazil. Their chemical properties: total organic carbon (TOC), pH, sum of bases (SB), H+, Al3+, cation exchange capacity (CEC), and V%; and physical properties: bulk density (BD), MR, MM, and OMD, were evaluated. Also, the quantitative fractionating of the HSs: fulvic acid (C-FAF), humic acid (CHAF), and humin (C-HUM), and C-FAH/C-FAF relations, C-EA/C-HUM (C-EA = C-FAF + C-FAH). The humic acids were extracted using the method of the International Humic Substances Society (IHSS), and evaluated by different techniques. The chemical attributes varied with the intensity of burning and agricultural usage. Though, in general, the Histosols presented low natural fertility, and it was related to the humic acid fraction (high ratio CFAH/ C-FAF). Amongst the SOM fractions the HUM predominated, with an average value of 59.98% of total carbon determined by the CHN; followed by the FAH. The C-FAH/C-FAF ratio diminished with the increase of agriculture usage intensity. The results of the TGI (Thermal Gravimetric Index) suggested strong resistance to thermal degradation of majority of the organic horizons. The elemental composition (%C, %H, %N, %O) of the humic acids showed large amplitude of variation between the horizons, but no pattern was observed between the Histosols. The increase of carbon content, the high values of TGI, and the reduction of oxygen content in the humic acids (HA) might explain the high thermal decomposition resistance found in the HA extracted form the Histosols. A correlation between H/C and TGI was observed, where the lower values of H/C were related to the highest resistance of the humic acids to thermal degradation. The spectroscopic and NMR techniques allowed characterizing compounds and groups of substances in the HA, showing the great potential of these tools in studies of HS from Histosols. The multivariate methods allowed a combined analysis of techniques applied in the study, showing a group of labile and recalcitrance materials in the soils. The results, in general, indicated the fragility of the Histosols areas, in terms of agricultural management and the formation environment. Their importance for the environment should be priority in comparison to agricultural usage, mainly due to their relevant part in the aquifers preservation. / Os Organossolos t?m pequena representatividade geogr?fica no Brasil, entretanto, s?o utilizados intensamente em modelos de agricultura familiar e t?m grande import?ncia ambiental. Por?m, a sua drenagem conduz ao processo de subsid?ncia e outras modifica??es na mat?ria org?nica do solo (MOS), com implica??es nas caracter?sticas dos Organossolos e em sua potencialidade. A natureza das subst?ncias h?micas (SHs) ? determinante nessas altera??es nos Organossolos. A caracteriza??o das SHs permite a compreens?o dos processos de transforma??o da MOS nos Organossolos e seu impacto no ambiente. Os objetivos deste trabalho foram: caracterizar Organossolos em v?rios ambientes e intensidade de uso agr?cola e avaliar altera??es nas fra??es humificadas da MO, atrav?s de t?cnicas de an?lise da composi??o elementar, espectrosc?picas, termodegradativas e de resson?ncia magn?tica nuclear (RMN). Foram estudados oito perfis de solos, nos Estados do Rio de Janeiro, Maranh?o e Paran?. Foram avaliadas as suas propriedades qu?micas: carbono org?nico total (COT), pH, soma de bases (SB), H+, Al3+, CTC e V%; e propriedades f?sicas: densidade do solo (Ds), RM, MM e DMO. Al?m do fracionamento quantitativo das SHs: ?cidos f?lvicos (C-FAF), ?cidos h?micos (C-FAH) e humina (C-HUM), e rela??es C-FAH/C-FAF, C-EA/CHUM (C-EA = C-FAF + C-FAH). Os ?cidos h?micos (AH) foram extra?dos pelo m?todo da Sociedade Internacional de Subst?ncias H?micas (IHSS) e avaliados por distintas t?cnicas. Os atributos qu?micos variaram com o efeito das queimadas e da intensidade de uso agr?cola; por?m, em geral, os Organossolos apresentaram baixa fertilidade natural, a qual, em geral, esteve relacionada ? fra??o ?cido h?mico (maior raz?o C-FAH/C-FAF). Dentre as fra??es da MO, a HUM predominou, com valor m?dio de 59,98% do carbono total determinado pelo CHN, seguida da FAH. A rela??o C-FAH/C-FAF diminuiu a medida que o uso agr?cola ? intensificado. Os dados do ITG (?ndice Termogravim?trico) sugeriram forte resist?ncia ? termodegrada??o para a maioria dos horizontes org?nicos. A composi??o elementar (%C, %H, %N, %O) dos ?cidos h?micos apresentou grande amplitude entre os horizontes, por?m sem padr?o diferenciado entre os Organossolos. O aumento do conte?do de carbono, os altos valores de ITG e a diminui??o do conte?do de oxig?nio nos ?cidos h?micos podem explicar a maior resist?ncia a termodecomposi??o dos AH extra?dos dos Organossolos. Foi observada correla??o entre a raz?o H/C e o ITG, onde os menores valores de H/C estiveram relacionados a maior resist?ncia dos AH ? termodegrada??o. As t?cnicas espectrosc?picas e de RMN permitiram caracterizar compostos e grupamentos nos AH, demonstrando o potencial dessas ferramentas nos estudos de SHs provenientes de Organossolos. Os m?todos de an?lise multivariada permitiram uma avalia??o conjunta das t?cnicas utilizadas, mostrando um grupo de amostras l?beis e recalcitrantes nos solos. Os resultados encontrados, em geral, indicam a fragilidade das ?reas de Organossolos, em fun??o do manejo para agricultura e do seu ambiente de forma??o. A sua import?ncia em termos ambientais deveria ser priorizada em rela??o ao uso agr?cola, principalmente pelo papel relevante na preserva??o de aqu?feros.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-08-23T20:42:07Z No. of bitstreams: 1 Tese_ roberta.pdf: 1295963 bytes, checksum: 0d60f7d523d2599d8bf9e13a4722fa8e (MD5) / Made available in DSpace on 2016-08-23T20:42:07Z (GMT). No. of bitstreams: 1 Tese_ roberta.pdf: 1295963 bytes, checksum: 0d60f7d523d2599d8bf9e13a4722fa8e (MD5) Previous issue date: 2016-03-22 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / This study aims to identify promising progenitors and hybrids for crop improvement of the forage watermelon, for this purpose the heterosis, general and specific combination capacities were estimated, in addition, the phenotypic correlation, the path analysis between morphoagronomic and bromatological characteristics were determined. Five progenitors were evaluated; LPG (1), VM (2), MR (3), BGCIA 228 (4) and Jojoba (5) belonging to Embrapa Semi?rido?s BAG, the ten F1?s were obtained from balanced diallel crossing. An augmented design in complete randomized blocks, with tree replications and eight plants per plot was used. The following characteristics were evaluated: FRP, FRN, PP, FRC/DT, CES, PES, TSS, NS, P100S, PFS, PSS, ProdF, CP, NDF, IVDMD, EE and K. Among the genotypes, potentiality for exploitation in crop improvement programs was observed. The choice of elongated fruit took into account the preference of agriculturists, resulting in the selection of all progenitors expressing this feature. The hybrids were obtained and evaluated in order to select the most promising for obtaining superior progenies to their genitors for the evaluated characteristics. Regarding the production, hybrids 1x4 and 4x5 stood out in obtaining more prolific progenies. The heterosis for bromatological characteristics was low, except for K. The general combining ability indicated the potential of the progenitor VM in obtaining progenies with higher CP and EE levels, as well as MR can contribute to increase fruit production. From the specific combining ability, it was verified that the hybrid 1x4 mostly showed FRP, NS, PSS and EE, as the hybrids 2x4, 3x4 and 3x5 displayed FRN, IVDMD and CP, respectively. From the phenotypic correlation, it was observed that the fruit with enhanced FRC/DT will possess greater PES and FRP, however less CP. The ridge path analysis, with PP dependent variable showed positive and low direct effects to the majority of the characteristics, moreover, indicated the reduction in the CP and NDF contents, important characteristics to the forage plants. The path analysis showed that the EE may be used in the selection of progenitors with higher PB levels. This work provides the first information on the pre-improvement of this culture, contributing to the achievement of more productive progenies and composed of higher levels of EE and CP, important elements for increased animal productivity. / Este trabalho objetivou identificar genitores e h?bridos de melancia forrageira promissores para o melhoramento da cultura, para isto foi estimada a heterose, capacidade geral e espec?fica de combina??o, al?m disto, determinou-se a correla??o fenot?pica, a an?lise de trilha entre os caracteres morfoagron?micos e bromatol?gicos.Foram avaliados cinco genitores; LPG (1), VM (2), MR (3), BGCIA 228 (4) e Jojoba (5) pertencentes ao BAG da Embrapa Semi?rido, os dez h?bridos F1?s foram obtidos a partir de cruzamentos dial?licos balanceados.Foi utilizado um delineamento em blocos casualizados completos, com tr?s repeti??es e oito plantas por parcela. Foram avaliadas as seguintes caracter?sticas: FRP, FRN, PP, FRC/DT, CES, PES, TSS, NS, P100S, PFS, PSS, ProdF, PB, FDN, DIVMS, EE e K. Observou-se entre os gen?tipos potencialidade para a explora??o em programas de melhoramento. A escolha de frutos alongados levou em considera??o ? prefer?ncia dos agricultores, resultando na sele??o de todos os genitores que expressam esta caracter?stica. Os h?bridos foram obtidos e avaliados com o intuito de selecionar os mais promissores para a obten??o de prog?nies superiores aos seus pais para as caracter?sticas avaliadas. Em rela??o ? produ??o, os h?bridos 1x4 e 4x5 destacaram-se para obten??o de prog?nies mais profil?ticas. As heteroses para as caracter?sticas bromatol?gicas foram baixas, exceto para K. A capacidade geral de combina??o indicou a potencialidade do genitor VM para obten??o de prog?nies com maiores teores de PB e EE, assim como MR poder? contribuir com aumento da produ??o de frutos. A partir da capacidade espec?fica de combina??o verificou-se que o h?brido 1x4 sobressaiu para FRP, NS, PSS e EE, j? os h?bridos 2x4, 3x4 e 3x5 destacaram-se para FRN, DIVMS e PB, respectivamente. A partir da correla??o fenot?pica observou-se que frutos com maior FRC/DT possuir?o maiores PES e FRP,no entanto menor PB. A an?lise de trilha em crista, com vari?vel dependentePP, apresentou efeitos diretos positivos e baixos para a maioria dos caracteres, al?m disto, indicoua redu??o nos teores de PB e FDN, caracter?sticas importantes para as forrageiras. A an?lise de trilha mostrou-seque o EE pode ser usado na sele??o de progenitores com maiores teores de PB.Este trabalho traz as primeiras informa??es sobre o pr?-melhoramento desta cultura, contribuindo com a obten??o de prog?nies mais produtivas e compostas de maiores teores de EE e PB, elementos importantes para o aumento da produtividade animal.

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Made available in DSpace on 2015-04-14T13:47:49Z (GMT). No. of bitstreams: 1 444788.pdf: 694162 bytes, checksum: 32c2a9034a1c8e928557ad5caa48125e (MD5) Previous issue date: 2012-12-03 / This study describes the situation of industrial development between 1970 and 1974, with the backdrop of the strategic action of the State and Federa??o da Ind?stria do Rio Grande do Sul (FIERGS) that aims to raise Rio Grande do Sul's industrial sector to a condition of the second industrial center of the country. Towards this direction, the overall objective of this study is to evaluate the degree of openness of the industrial entrepreneur from Rio Grande do Sul to a new economic order. Therefore, this study sought to ascertain the degree of openness achieved by the industry workers, through data related to levels of technological innovation, industrial policy, business mentality, business characteristics and from the politic action of the Federation and entrepreneur to the adoption of a new way of looking at the situation and to make choices in other bases. Thus through specific objectives, it was analyzed the state's political-institutional arrangement through the industrial policy, having as analysis object the program of financial incentives to encourage industrial investment, on the other hand, it was analyzed the Federation's strategic action with respect to the industrial policy and the matter of entrepreneurial qualification, as well as innovations for companies from Rio Grande do Sul. Thus the intent of these specific objectives is to accommodate a referential from which the indicated discussion will gain importance and intelligibility. In this context, came up as fundamental hypothesis that mechanisms created to be the second industrial center of the country, provided conditions for the formation of an entrepreneurial mentality to a new economic order that, at this juncture, it was stimulated by the need to face the problem of business excellence and competitive leadership with more intensity and effectiveness, even for the sake of their own survival. / O presente estudo descreve a conjuntura do desenvolvimento industrial entre 1970 e 1974, tendo como pano de fundo a a??o estrat?gica do Estado e da Federa??o da Ind?stria do Rio Grande do Sul (FIERGS) que buscava elevar o setor industrial ga?cho ? condi??o de segundo polo industrial do pa?s. Nessa dire??o, o objetivo geral desse estudo ? avaliar o grau de abertura do empres?rio industrial ga?cho a uma nova ordem econ?mica. Portanto, buscou-se verificar o grau de abertura alcan?ado pelos industriais, atrav?s de dados referentes aos n?veis da inova??o tecnol?gica, politica industrial, mentalidade empresarial, caracter?sticas das empresas e da a??o politica da Federa??o e do empres?rio a ado??o de uma nova forma de ver a situa??o e fazer escolhas em outras bases. Dessa forma, atrav?s dos objetivos espec?ficos, analisou-se o arranjo pol?tico-institucional do Estado mediante a pol?tica industrial, tendo como objeto an?lise o programa de incentivos financeiros ao fomento de investimento industrial, por outro, analisou-se a??o estrat?gica da Federa??o com rela??o ? politica industrial e ao tema da qualifica??o empresarial e das inova??es para as empresas ga?chas. Assim, o intento dos objetivos espec?ficos apresentados ? o de acomodar um referencial a partir do qual a discuss?o indicada ganhe import?ncia e inteligibilidade. Neste contexto, levantou-se como hip?tese fundamental, que os mecanismos criados para des?gnio de ser o segundo polo industrial do pa?s proporcionou condi??es ? forma??o de uma mentalidade empresarial a uma nova ordem econ?mica, que nessa conjuntura, foi estimulada pela necessidade de enfrentar com mais intensidade e efic?cia o problema da excel?ncia empresarial e da lideran?a competitiva, at? por quest?o de sua pr?pria sobreviv?ncia.

Made available in DSpace on 2015-04-14T13:58:56Z (GMT). No. of bitstreams: 1 444965.pdf: 19735321 bytes, checksum: 848931c529752f1baa29108987cfc311 (MD5) Previous issue date: 2012-11-09 / Biodiesel is a synthetic fuel usually produced by the transesterification reaction. This study was undertaken to monitor the kinetics of the transesterification reaction between soybean oil and methanol catalyzed by potassium methoxide. A series of reactions was monitored with a laser spectrometer used to analyze the absorption and scattering of light in real-time. The objectives of this study aimed to determine when the reaction came in chemical equilibrium. This objective was achieved by observing an arbitrary time interval, experimentally obtained from the graph of electrical resistance versus time, allowing optimize reaction time, by using a monitoring system that combined the information received through multiple sensors. Determine if the optical phenomenon observed during the reaction could be described by Euclidean geometry and whether it was related with the internal conical diffraction. It was found that it is not related to the internal conical diffraction, however, depending on the scale applied to observe the optical phenomenon it can be described by the Euclidean geometry. The goal of developing analytical instrumentation was achieved by constructing a non-invasive laser spectrometer. / O biodiesel ? um combust?vel sint?tico, geralmente produzido a partir da rea??o de transesterifica??o. Este trabalho foi desenvolvido para monitorar a cin?tica da rea??o de transesterifica??o entre o ?leo de soja e o metanol, catalisada por met?xido de pot?ssio. Uma s?rie de rea??es foi monitorada com um espectr?metro laser, utilizado para analisar a absor??o e o espalhamento da luz em tempo-real. Os objetivos deste trabalho visaram determinar quando a rea??o entrou em equil?brio qu?mico. Atingiu-se este objetivo atrav?s da observa??o de um intervalo arbitr?rio de tempo, obtido experimentalmente a partir do gr?fico da resist?ncia el?trica em fun??o do tempo, permitindo otimizar o tempo de rea??o atrav?s da utiliza??o de um sistema de monitoramento que combinava as informa??es recebidas atrav?s de v?rios sensores. Determinar se o fen?meno ?ptico observado durante a rea??o poderia ser descrito pela geometria Euclidiana e se o mesmo tinha rela??o com a difra??o c?nica interna. Constatou-se que o mesmo n?o apresenta rela??o com a difra??o c?nica interna, por?m, dependendo da escala utilizada para observar o fen?meno ?ptico, ele pode ser descrito pela geometria Euclidiana. O objetivo de desenvolver instrumenta??o anal?tica foi alcan?ado atrav?s da constru??o de um espectr?metro laser n?o invasivo.