Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-14T17:30:27Z (GMT) No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) / Made available in DSpace on 2016-07-14T17:30:27Z (GMT). No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) Previous issue date: 2016-02-26 / Les?es odontog?nicas epiteliais benignas s?o entidades de grande import?ncia cl?nica que se desenvolvem nos ossos maxilares a partir dos tecidos que formam os dentes. Tem sido demonstrado que em tumores benignos e malignos, est?o presentes um grande n?mero de c?lulas tronco tumorais, as quais tem grandes implica??es no desenvolvimento dos tumores. Oct-4 e CD44 t?m sido demostrados como importantes marcadores para c?lulas-tronco tumorais. O objetivo deste estudo foi identificar c?lulas epiteliais que expressam marcadores de c?lulas tronco atrav?s da express?o imuno-histoqu?mica de Oct-4 e CD44 em uma s?rie de casos de les?es odontog?nicas epiteliais ben?gnas. A amostra foi constitu?da por 20 casos de ceratocisto odontog?nico (CCO), 20 caos de Ameloblastoma s?lido/multic?stico e 20 casos de Tumor Odontog?nico Adenomatoide (TOA). A express?o de Oct-4 e CD44 foi avaliada no epit?lio das les?es atrav?s do percentual de c?lulas positivas(PP) e da intensidade da express?o ( IE ), sendo realizado o somat?rio destes escores, resultando na Pontua??o de Imunomarca??o Total (PIT) que variou de 0 a 7. Os resultados do presente estudo foram analisados pelo valor da pontua??o de PIT. Todos os casos apresentaram positividade para os dois marcadores e a maioria exibiu alta express?o para ambos os marcadores. A an?lise da express?o de Oct-4 n?o revelou diferen?as estatisticamente significativas (p = 0,406) entre as les?es estudadas. Com rela??o ? express?o do CD44, houve diferen?a estatisticamente significativa entre os casos de ameloblastoma e CCO, apresentando este ?ltimo maior n?mero de casos no score 7 (p = 0,034). Na analise da correla??o da imunoexpress?o de ambos os marcadores nas tr?s les?es estudadas, n?o houve correla??o estatisticamente significativa . Os resultados do presente estudo identificaram a presen?a de c?lulas com caracter?sticas troncais dispostas em locais variados do componente epitelial das les?es ora estudadas sugerindo a sua poss?vel participa??o na histog?nese e diferencia??o em les?es odontog?nicas epiteliais benignas contribuindo assim para o desenvolvimento destas les?es. / benign epithelial odontogenic lesions are great clinical importance entities that develop in the jaws from the tissues that form teeth. It has been shown that in benign and malignant tumors, are present in a large number of tumor stem cells, which has great implications in the development of these lesions. Oct-4 and CD44 have been demos as important markers for tumoral stem cells. The objective of this study was to identify epithelial cells expressing stem cell markers by immunohistochemical expression of Oct-4 and CD44 in a series of cases of benign epithelial odontogenic lesions. The sample was comprised of 20 cases of odontogenic keratocyst (OKC), 20 cases of solid/multicystic ameloblastoma and 20 cases of adenomatoid odontogenic tumor (AOT). The expression of Oct-4 and CD44 was evaluated in epithelial lesions using the percentage of positive cells (PP) and the intensity of expression (IE), being realized the sum of these scores, resulting in Total Immunostaining Score (TIS) ranging 0 to 7. The results were submitted to the appropriate statistical test (nonparametric Kruskal-Wallis and Spearman correlation coefficient). All cases were positive for both markers and most showed high expression of both markers. The analysis of Oct-4 expression revealed no statistically significant differences (p = 0.406) among the studied lesions. Regarding the CD44 expression, there was a statistically significant difference between the cases of ameloblastoma and TOA in relation to the CCO, with the latter show more cases in the score 7 (p = 0.034). In the correlation analysis of the immunoreactivity of both markers in the three lesions studied, there was no statistically significant correlation. The results of this study identified the presence of cells with stemness characteristics arranged at various sites in the epithelial component of the studied lesions suggesting their possible role in the histogenesis and differentiation in benign epithelial odontogenic lesions, thus contributing to the development of these lesions.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-14T22:02:14Z (GMT) No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) / Made available in DSpace on 2016-07-14T22:02:14Z (GMT). No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) Previous issue date: 2016-02-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Introdu??o: A endonuclease apur?nica/apurimid?nica (APE-1) ? uma prote?na essencial para a via do reparo por excis?o de bases (BER) do DNA, al?m de regula??o de atividades redox. A capacidade de c?lulas malignas em reconhecer e reparar danos no DNA ? um mecanismo importante para sobreviv?ncia tumoral, e estudos recentes sugerem que a superexpress?o da APE-1 pode se relacionar com o pobre progn?stico em alguns tumores. Objetivo: Analisar a imunoexpress?o da APE-1 em Adenomas Pleom?rficos (AP) e Carcinomas Ex-Adenomas Pleom?rficos (CaExAP) de gl?ndulas salivares. Materiais e M?todos: Foram selecionados 49 tumores fixados em formol e inclu?dos em parafina (33 AP e 16 CaExAP) que foram submetidos a estudo imuno-histoqu?mico pela t?cnica da imunoperoxidase. A imunoexpress?o da APE-1 foi avaliada de forma quantitativa pelo percentual de c?lulas imunopositivas. Para an?lise estat?stica foi adotado n?vel de signific?ncia de 5% (p ? 0,05). Resultados: Todos os casos de AP e CaExAP (n=49) foram positivos para APE-1, no entanto, houve maior express?o em CaExAP havendo diferen?a estatisticamente relevante (p<0,001). N?o foi encontrada associa??o da express?o da APE-1 entre tumores de gl?ndula salivar maior ou menor, entretanto, em AP n?o encapsulados (Mediana de express?o= 54,2%) houve maior express?o quando comparados a tumores encapsulados (p=0,02). A superexpress?o da APE-1 foi constatada principalmente em casos de CaExAP com met?stase linfonodal (Mediana de express?o= 90,3% - p=0,002) e padr?o invasivo (Mediana de express?o= 89,9% - p=0,003) quando comparados aos casos sem met?stase e intracapsulares. Conclus?o: Este estudo sugere que a APE-1 encontra-se desregulada nos tumores estudados. A maior express?o da APE-1 est? associada com a aus?ncia de c?psula completa em AP e a superexpress?o est? relacionada com o comportamento mais agressivo do CaExAP. / Introduction: Apurinic/Apyrimidinic Endonuclease 1 (APE-1) is an essential protein for DNA base excision repair (BER) pathway and regulation of redox activities. The ability of malignant cells to recognize and repair DNA damage is an important mechanism for tumor survival, and recent studies suggest that APE-1 overexpression is related to poor prognosis in some tumors. Purpose: To analyze the immunoreactivity of APE-1 in Pleomorphic Adenomas (PA) and Carcinomas Ex Pleomorphic Adenomas (CaExPA) of salivary glands. Materials and Methods: A total of 49 tumors fixed in formalin and embedded in paraffin (33 PA and 16 CaExPA) underwent immunohistochemical study by the immunoperoxidase technique. APE-1 immunoreactivity was evaluated quantitatively by the percentage of immunopositive cells. For statistical analysis a significance level of 5% (p? 0.05) was adopted. Results: All cases of PA and CaExPA (n=49) were positive for APE-1, however, there was a higher expression in CaExPA, with statistically significant difference (p<0.001). There was no association between APE-1 expression and tumors of major or minor salivary gland, however, not encapsulated PA (median expression = 54.2%) showed higher expression when compared to encapsulated tumors (p=0.02). APE-1 overexpression was found mainly in cases of CaExAP with lymph node metastasis (median expression = 90.3% - p=0.002) and invasive pattern (median expression = 89.9% - p=0.003), when compared to cases without metastasis and intracapsular pattern. Conclusion: This study suggests that APE-1 is deregulated in the studied tumors. The increased expression of APE-1 is associated with the absence of complete capsule in PA and it is associated with more aggressive behavior in CaExPA.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-15T18:45:17Z (GMT) No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) / Made available in DSpace on 2016-07-15T18:45:17Z (GMT). No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) Previous issue date: 2016-02-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivo desse estudo foi analisar a imunoexpress?o de receptores de calcitonina (CTRs) e glicocorticoides (GCRs) em les?es centrais de c?lulas gigantes (LCCGs) agressivas e n?o agressivas. Trata-se de um estudo imuno-histoqu?mico (t?cnica da imunoperoxidase), quantitativo e descritivo de 52 casos de LCCGs dos ossos maxilares, nos quais 13 pacientes portadores de LCCG foram tratados com triancinolona intralesional ou calcitonina spray intranasal. A m?dia de imunomarca??o foi comparada entre os tipos celulares e subtipo cl?nico da les?o. O teste de Mann-Whitney foi realizado para essas compara??es. Dos 52 casos de LCCGs, 53.8% eram do g?nero feminino, com uma m?dia de idade de 25.69 anos. A mand?bula foi o s?tio anat?mico mais acometido. Trinta casos (57.7%) foram de LCCGs agressivas e 22 (42.3%) de n?o agressivas. A cirurgia foi o tratamento de escolha em 75% das LCCGs estudadas. Em 56.7% das LCCGs agressivas foi realizada cirurgia, enquanto 43.4% foram submetidas ao tratamento conservador. Dos submetidos ao tratamento conservador, a maioria (n = 8; 61.5%) respondeu bem ao tratamento. A express?o de CTR foi evidenciada em 67.3% da amostra e para o GCR em 96.15% dos casos. N?o houve diferen?a estatisticamente significante entre a express?o de CTRs e GCRs em c?lulas mononucleares e multinucleadas das LCCGs em rela??o ? agressividade, em rela??o ao tratamento realizado para os casos de les?es agressivas e em rela??o ? resposta ao tratamento conservador realizado nos casos de LCCGs agressivas (p>0.05). Os resultados da nossa pesquisa sugerem que a imunoexpress?o dos CTRs e GCRs n?o influenciou na resposta ao tratamento cl?nico com calcitonina ou triancinolona na amostra estudada e exibiu uma express?o variada independente da agressividade da les?o. / The aim of this study was to analyze the immunoexpression of calcitonin (CTR) and glucorticoid (GCR) receptors in aggressive and non-aggressive central giant cell lesions (CGCL). This is an immunohistochemistry study (immunoperoxidase technique) of 52 cases of CGCL of the jaws, in which 12 patients were treated with intralesional triamcinolone injections and one with calcitonin nasal spray. The mean of immunostaining was compared between the cell types and clinical subtype of the lesion. The correlations among means were analyzed by Mann-Whitney test. Of the 52 cases studied, 53.8% were females, with a mean of 25.69 years. Most lesions were located in the mandible. Thirty patients (57.7%) had aggressive lesions and 22 (42.3%) of the cases consisted of non-aggressive lesions. Surgery was the treatment of choice in 75% of the cases. In 56.7% of the aggressive CGCL surgery was performed, while 43.4% of patients were submitted to conservative treatment. Among cases submitted to conservative treatment, the majority (n = 8; 61.5%) responded well to treatment. CTR expression was observed in 67.3% and GCR in 96.15% of cases. There was no significant statistical difference between the expression of CTRs and GCRs in mononuclear and multinucleated CGCLscells, regarding aggressiveness, treatment performed for aggressive lesions and the response to conservative treatment (p>0.05). The results of our research suggest that the immunoreactivity of CTRs and GCRs did not influence the response to clinical treatment with calcitonin or triamcinolone in the sample studied and it exhibited a varied expression regardless of the aggressiveness of the lesion.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-20T21:51:02Z No. of bitstreams: 1 FabiaMariaGomesDeMeneses_TESE.pdf: 3548488 bytes, checksum: 82c1b49fbed074cc6175d3f6ed8fda0e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-21T20:06:15Z (GMT) No. of bitstreams: 1 FabiaMariaGomesDeMeneses_TESE.pdf: 3548488 bytes, checksum: 82c1b49fbed074cc6175d3f6ed8fda0e (MD5) / Made available in DSpace on 2016-07-21T20:06:15Z (GMT). No. of bitstreams: 1 FabiaMariaGomesDeMeneses_TESE.pdf: 3548488 bytes, checksum: 82c1b49fbed074cc6175d3f6ed8fda0e (MD5) Previous issue date: 2015-10-15 / O estudo das rea??es qu?micas encontra-se entre os conte?dos mais importantes para a compreens?o da disciplina de Qu?mica. Mas ainda s?o pouco os estudos que apresentam as rea??es qu?micas como sistema complexo. A tese aqui apresentada tem como objetivo investigar, identificar e caracterizar os erros e dificuldades de aprendizagem de estudantes em rela??o as rea??es qu?micas como sistema complexo, utilizando para tanto a an?lise das respostas de 126 provas de estudantes candidatos ao curso de Licenciatura em Qu?mica, oferecido pela Universidade Federal do Rio Grande do Norte (UFRN). Foram investigados e discutidos os erros e dificuldades de aprendizagem dos par?metros ?G, Kp, Ea e do c?lculo de quantidade de subst?ncia numa rea??o qu?mica e a inter-rela??o desses par?metros no estudo das rea??es qu?mica como sistema. O trabalho classificou em n?veis de desenvolvimento a habilidade de interpretar a rea??o qu?mica como sistema. A partir de entrevistas realizadas com professores de Qu?mica, do Ensino M?dio, se determinou as raz?es a que os professores atribuem esses erros e dificuldades de aprendizagem. A aprendizagem das rea??es qu?mica no Ensino M?dio perpassa por conceitos de termoqu?mica, de cin?tica, do equil?brio e os seus aspectos quantitativos e qualitativos, esses conceitos n?o possuem uma articula??o org?nica entre si para a melhor compreens?o de como ocorre e porque ocorre uma rea??o qu?mica, o que garante a compreens?o dos sentidos das partes numa totalidade. Os resultados obtidos indicam que os estudantes n?o compreendem o conceito de ?G, Kp, Ea. Os professores n?o trabalham na perspectiva de integra??o dos conte?dos o que leva os alunos a apresentarem dificuldades e cometerem erros relacionados ao conte?do citado. O trabalho apresenta uma proposta de organiza??o dos conte?dos da Qu?mica para o Ensino M?dio como uma possibilidade de integra??o sist?mica dial?tica dos conte?dos, entendendo que essa vis?o sistem?tica, leva a importantes contribui??es com o desenvolvimento do pensamento te?rico dos alunos. A estrutura??o dos conte?dos da Qu?mica apresentado nesse trabalho, fundamenta-se no m?todo de an?lise sist?mico dial?tico funcional-estrutural desenvolvidos Reshetova (1988) e N?nez (1992). Essa tese traz contribui??es significativas para o ensino-aprendizagem de uma rea??o qu?mica como sistema complexo. / The study of chemical reactions is among the most important contents to the understanding of Chemistry discipline in basic education. However, there are still few studies about chemical reactions as a complex system because, generally, this content is presented in textbooks, taught and even researched in a fragmented form. The thesis here presented aims to investigate, identify and characterize the mistakes and learning difficulties of the students about chemical reactions as a complex system, using for that purpose the analysis of the answers of 126 exams of candidates for the bachelor?s degree in Chemistry Teaching on the entrance exam for the Federal University of Rio Grande do Norte (UFRN). The mistakes and learning difficulties about the parameters ?G?, Kp, Ea and of the calculation of the amount of substance in a chemical reaction have been identified, as well as the levels of development of the ability to interpret the chemical reaction as a system. The main theoretical source of this study is structured based on the mistakes and learning difficulties (N??EZ, RAMALHO, 2012), of the chemical reactions as complex systems (N??EZ, 1994; RESHETOVA, 1988; SANDERSON, 1968). As methodology, it was prioritized the analysis of the answers to the exams and the interview with the teachers. The results showed typical mistakes in the study of this subject, especially low levels and skill development. No student was able to integrate the different aspects in the systemic understanding of the chemical reaction. From the interviews with Chemistry teachers from High School, it was determined the reasons the teachers assign to those mistakes and learning difficulties. The interviews revealed that the teachers do not work in the perspective of integration of the contents which leads the students to present difficulties and make mistakes related to the content previously mentioned. The study presents a proposal for the organization of the contents of Chemistry discipline for High School as a possibility of a dialectic systemic integration of contents, understanding that this systematic vision, leads to important contributions to the development of the theoretical thinking of the students. We can mention as one of the conclusions of this study, the fact that the non-systemic organization of contents do not favor this kind of thinking in students.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:25Z No. of bitstreams: 1 AlannyChristinyCostaDeMelo_DISSERT.pdf: 4456971 bytes, checksum: 8caf70bc14125d0010bb4e21e9d3aa55 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T20:49:41Z (GMT) No. of bitstreams: 1 AlannyChristinyCostaDeMelo_DISSERT.pdf: 4456971 bytes, checksum: 8caf70bc14125d0010bb4e21e9d3aa55 (MD5) / Made available in DSpace on 2016-07-28T20:49:41Z (GMT). No. of bitstreams: 1 AlannyChristinyCostaDeMelo_DISSERT.pdf: 4456971 bytes, checksum: 8caf70bc14125d0010bb4e21e9d3aa55 (MD5) Previous issue date: 2016-03-04 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / N?s estudamos a Bacia Potiguar Cret?cea na margem Equatorial do Brasil para entender a geometria das grandes falhas e a influ?ncia da heterogeneidade crustal e o fabric estrutural preexistente na evolu??o da arquitetura interna bacia. Estudos anteriores apontaram que o rifte ? um meio graben assim?trico alongado de dire??o NE-SW. Para determinar o deslocamento m?ximo (Dm?x) e comprimento (L) dos principais segmentos de falha de borda do Rifte Potiguar foram usados s?smica 2D, dados de po?os e modelagem gravim?trica 3D. A modelagem gravim?trica 3D foi parametrizada com os dados de po?os e interpreta??es das se??es s?smicas. O grau de incerteza do modelo gravim?trico foi da ordem 10% aos dados s?smicos e de po?os. Atrav?s das curvas de crescimento de falhas foi poss?vel dividir as falhas de borda do rifte em quatro segmentos principais, os quais forneceram valores Dm?x/L da mesma ordem de grandeza. As curvas de crescimento de falhas sugerem que um mecanismo tect?nico uniforme regional teria influenciado o crescimento dos segmentos dessas falhas. As varia??es dos deslocamentos m?ximos ao longo dos segmentos de falha indicam que estes segmentos se desenvolveram de forma independente durante o in?cio do rifteamento e, posteriormente, foram unidos por liga??es rig?das e flex?veis. Este ?ltimo, chegou a formar uma rampa de al?vio entre as falhas de Baixa Grande e Carnaubais. Nos pontos de interliga??o entre falhas as taxas Dm?x / L s?o mais elevadas devido ? interfer?ncia do crescimento dos segmentos de falha adjacentes. A evolu??o do Rifte Potiguar foi dividida em cinco etapas com base nas rela??es Dm?x/L, que foram correlacionadas com as principais fases tect?nicas da separa??o entre a Am?rica do Sul e ?frica no Cret?ceo Inferior. / The discussion about rift evolution in the Brazilian Equatorial margin during the South America-Africa breakup in the Jurassic/Cretaceous has been focused in many researches. But rift evolution based on development and growth of faults has not been well explored. In this sense, we investigated the Cretaceous Potiguar Basin in the Equatorial margin of Brazil to understand the geometry of major faults and the influence of crustal heterogeneity and preexisting structural fabric in the evolution of the basin internal architecture. Previous studies pointed out that the rift is an asymmetrical half-graben elongated along the NE-SW direction. We used 2D seismic, well logs and 3D gravity modeling to analyze four major border fault segments and determine their maximum displacement (Dmax) and length (L) ratio in the Potiguar Rift. We constrained the 3D gravity modeling with well data and the interpretation of seismic sections. The difference of the fault displacement measured in the gravity model is in the order of 10% compared to seismic and well data. The fault-growth curves allowed us to divide the faulted rift border into four main fault segments, which provide roughly similar Dmax/L ratios. Fault-growth curves suggest that a regional uniform tectonic mechanism influenced growth of the rift fault segments. The variation of the displacements along the fault segments indicates that the fault segments were formed independently during rift initiation and were linked by hard and soft linkages. The latter formed relay ramps. In the interconnection zones the Dmax/L ratios are highest due to interference of fault segment motions. We divided the evolution of the Potiguar Rift into five stages based on these ratios and correlated them with the major tectonic stages of the breakup between South America and Africa in Early Cretaceous.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:28Z No. of bitstreams: 1 ClaudeteRodriguesDeSouza_DISSERT.pdf: 7248197 bytes, checksum: 517f3832b2c0793432a194051a3ea304 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T22:35:34Z (GMT) No. of bitstreams: 1 ClaudeteRodriguesDeSouza_DISSERT.pdf: 7248197 bytes, checksum: 517f3832b2c0793432a194051a3ea304 (MD5) / Made available in DSpace on 2016-07-28T22:35:34Z (GMT). No. of bitstreams: 1 ClaudeteRodriguesDeSouza_DISSERT.pdf: 7248197 bytes, checksum: 517f3832b2c0793432a194051a3ea304 (MD5) Previous issue date: 2014-04-03 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Este estudo foi desenvolvido em uma ?rea localizada na plataforma externa da Bacia Potiguar, margem equatorial brasileira. A amostragem de sedimentos foi realizada em tr?s campanhas, em torno de um po?o explorat?rio, para comparar as propriedades dos sedimentos do fundo marinho, incluindo granulometria, composi??o, conte?do de carbonato e mat?ria org?nica, anterior a perfura??o do po?o, com amostras coletadas 3 e 12 meses ap?s a perfura??o. O planejamento amostral utilizou 16 esta??es localizadas em 4 radiais distantes 50 m, 100 m, 250 m e 500 m do po?o. Os sedimentos foram analisados nas camadas 0-2 cm e 0-10 cm. Os resultados mostraram que a cobertura sedimentar em torno do po?o era pobre a muito pobremente selecionada, com granulometria predominante na fra??o areia grossa com granulo e cascalho, seguida por cascalho e lama. O conte?do de carbonato de c?lcio foi maior que 96%, associado a sedimentos biocl?ticos, e o conte?do de mat?ria org?nica foi menor que 12%. Apenas pequenas varia??es sedimentol?gicas ocorreram na ?rea afetada pelas opera??es de perfura??o. A principal diferen?a foi observada em amostras da segunda campanha, em termos de uma mudan?a na distribui??o granulom?trica associada a um aumento no conte?do de sedimentos silicicl?sticos. Este impacto ocorreu nos sedimentos mais superficias (0-2 cm), no raio mais pr?ximo ao po?o (50 m), e poderia sugerir o efeito da perfura??o. Entretanto, os sedimentos coletados na campanha 3, um ano ap?s a perfura??o, voltaram a apresentar as mesmas caracter?sticas da primeira campanha. Estes resultados indicam que n?o houve varia??es sedimentol?gicas significantes devido a atividade de perfura??o, e que a din?mica oce?nica na ?rea de estudo foi forte o suficiente para recuperar as caracter?sticas originais do ambiente. ABSTRACT This study was developed in an area located on the outer shelf in the Potiguar Basin, Brazilian equatorial margin; this tropical shelf represents a modern, highly dynamic mixed carbonate-siliciclastic system. Field sampling was carried out during 3 cruises surrounding a shallow-water exploratory well to compare sediment properties of the seafloor, including grain-size, texture, mineral composition, carbonate content, and organic matter, prior to drilling with samples obtained 3 and 12 months after drilling. The sample grid used had 16 stations located along 4 radials from 50 m the well up to a distance of 500 m. Sediments were analyzed in the first 0-2 cm, and 0-10 cm layers. The results show that sedimentary cover around the well is poor to very poorly sorted, with the particle size predominantly in the medium to coarse sand fraction, followed by gravel and mud. The content of calcium carbonate is greater than 96%, associated to bioclastic sediments, and the content of organic matter is less than 12%. Only minor sedimentological variations occured ?in the area affected by drilling operations. The most noticeable effects were observed during the second cruise, in terms of a change in grain size distribution associated to an increase in siliciclastic content, This impact occurred in the most surficial sediment (0-2 cm), in the radial closest to the well (50 m), and could suggest the effects of drilling. However, in the third cruise, one year after drilling, the sediments return to show the same characteristics as in the first cruise. These results show no significant sedimentological variations due to drilling activity, and indicate that ocean dynamics in this area was high enough to recover the environment original characteristics. / This study was developed in an area located on the outer shelf in the Potiguar Basin, Brazilian equatorial margin; this tropical shelf represents a modern, highly dynamic mixed carbonate-siliciclastic system. Field sampling was carried out during 3 cruises surrounding a shallow-water exploratory well to compare sediment properties of the seafloor, including grainsize, texture, mineral composition, carbonate content, and organic matter. Cruise 1 (C1) was carried prior to drilling, while Cruise 2(C2) and 3 (C3) respectivelly 3 and 12 months after drilling. The sample grid used had 16 stations located along 4 radials from 50 m the well up to a distance of 500 m. Sediments were analyzed in the first 0-2 cm, and 0-10 cm layers. The results show that sedimentary cover around the well is poor to very poorly sorted, with the particle size predominantly in the medium to coarse sand fraction, followed by gravel and mud. The content of calcium carbonate is greater than 96%, associated to bioclastic sediments, and the content of organic matter is less than 12%. Only minor sedimentological variations occured in the area affected by drilling operations. Mainly observed during the second cruise, in terms of a change in grain size distribution associated to an increase in siliciclastic content, This impact occurred in the most surficial sediment (0-2 cm), in the radial closest to the well (50 m), and could suggest the effects of drilling. However, in the third cruise, one year after drilling, the sediments return to show the same characteristics as in the first cruise. These results show no significant sedimentological variations due to drilling activity, and indicate that ocean dynamics in this area was high enough to recover the environment original characteristics.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:28Z No. of bitstreams: 1 CristianeLeaoCordeiroDeFarias_DISSERT.pdf: 6033643 bytes, checksum: 958aa1ad7170e354d48b68819bbeaf94 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T23:04:10Z (GMT) No. of bitstreams: 1 CristianeLeaoCordeiroDeFarias_DISSERT.pdf: 6033643 bytes, checksum: 958aa1ad7170e354d48b68819bbeaf94 (MD5) / Made available in DSpace on 2016-07-28T23:04:10Z (GMT). No. of bitstreams: 1 CristianeLeaoCordeiroDeFarias_DISSERT.pdf: 6033643 bytes, checksum: 958aa1ad7170e354d48b68819bbeaf94 (MD5) Previous issue date: 2015-11-16 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os estu?rios tem grande import?ncia como abrigo e ber??rio natural de animais marinhos, prov?m peixes para o homem,sustenta a cadeia alimentar, controla as a??es erosivas e alagamentos, atua nosistema de filtragem natural da polui??o e purifica??o do ar. O Rio Potengi temsido afetado por diversos fatores antr?picos ao longo dos anos, com v?riosdesastres ambientais que mataram peixes, aves e outros animais. Para analisar asitua??o recente do estu?rio do Rio Potengi, foram coletadas 42 amostras, 18 emOutubro/2011 ao longo do Rio Potengi e sua foz, e 24 em Janeiro/2012, inclu?mosa plataforma interna. An?lises univariadas (?ndices ecol?gicos) e multivariadas(PCA, MDS, CLUSTER e BIOENV) foramaplicadas ? matriz dos dados biol?gicos de foramin?feros e abi?ticos (CaCO3,salinidade, profundidade, temperatura e granulometria). Os resultados mostram a domin?ncia deforamin?feros oportunistas A. tepida,B. striatula, Q. patagonica e Q. milettiespecialmente nas regi?es pr?ximas ?s fazendas de carcinicultura e ao esgoto doCanal do Baldo em ambientes de granulometria fina, e Q. lamarckiana indicadora da penetra??o da cunha salina e ambientesde alta hidrodin?mica associada a sedimentos de areia grossa a muito fina. A presen?a de esp?cies caracter?sticasmarinhas H. boueana, E. discoidale, P. atlanticum, T. earlandie T. gramen na Foz do Rio Potengi ena plataforma interna indicam ambientes de altas salinidades. A ocorr?ncia dealgumas esp?cies tolerantes ? baixa salinidade como T. inflata e T. squamatano Canal do Rio Potengi sugerem que provavelmente devem ter sido transportadosdo manguezal pr?ximo ? foz do Rio Potengi para as regi?es de plataformainterna, sugerindo que o contribuinte fluvial ? capaz de exportar organismos de?gua doce preferivelmente em dire??o sul do que em dire??o norte. / The Potengi River estuary has been affected by various anthropogenic factors over the years, as periodic dredging, industrial and domestic waste, traffic and other factors, causing various environmental disasters, including the notorious ecological accident in July 2007, which covered the municipalities of S?o Gon?alo do Amarante, Maca?ba and Natal. Foraminifera serve as viable study tools in these environments; they are able to identify ecologically stressed environments, pointing out hydrographic changes and depositional environments in estuaries. The necessity to check the differences in environmental gradients in places anthropically impacted in Potengi River and adjacent inner shelf through species of foraminifera, and, the responses of these organisms to physical, chemical and geological factors is to provide baseline in the diagnosis of environments. The results show the dominance of opportunistic Ammonia tepida, Bolivina striatula, Quinqueloculina patagonica and Q. miletti especially in regions close to shrimp farms and Baldo Channel sewage in fine grain environments; and Q. lamarckiana indicates penetration of the saline waters in Potengi River. The occurrence of low-salinity tolerant foraminiferal species typical of mangrove environments as Trochammina inflata and T. squamata in Potengi River Channel suggest they probably could have been transported from mangrove area near the Potengi river mouth to the inner shelf regions. These findings suggest Potengi River is able to export mixohaline and mangrove organisms to inner shelf. Two distinct environments were observed, the outermost area is more influenced by marine influence and the innermost area is less influenced. Calcareous and agglutinated species dominate Potengi River, while mouth and inner shelf areas are dominated by calcareous, agglutinated and porcelaneous species, which are typical of highly saline and hydrodynamic environments and the contributive factors that controls foraminiferal distribution were balance of marine and freshwater currents, grain size, availability of CaCO3 and organic matter.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:29Z No. of bitstreams: 1 HasanLopesShihadeh_DISSERT.pdf: 4749062 bytes, checksum: 5c56d7aad70a0d9ccc2eba27d546688b (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T23:45:09Z (GMT) No. of bitstreams: 1 HasanLopesShihadeh_DISSERT.pdf: 4749062 bytes, checksum: 5c56d7aad70a0d9ccc2eba27d546688b (MD5) / Made available in DSpace on 2016-07-28T23:45:09Z (GMT). No. of bitstreams: 1 HasanLopesShihadeh_DISSERT.pdf: 4749062 bytes, checksum: 5c56d7aad70a0d9ccc2eba27d546688b (MD5) Previous issue date: 2015-09-08 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Neste trabalho foi realizado um estudo para a obtenc?a?o de para?metros para um modelo regional de velocidades 1D va?lido para a Provi?ncia Borborema, NE do Brasil. Para tanto, foram utilizados eventos que ocorreram na mesma entre 2001 e 2013 com magnitude acima de 2.9 e que tiveram epicentros bem determinados por redes locais de estac?o?es ou back azimuth, quando os dados sa?o de boa qualidade. Foram escolhidos 7 eventos ocorridos nas principais a?reas si?smicas da Provi?ncia Borborema. Os eventos selecionados foram, ao todo, registrados em 74 estac?o?es das redes: RSISNE, INCT-ET, Mile?nio, Joa?o Ca?mara - RN, Sa?o Rafael - RN, Caruaru - PE, Sa?o Caetano - PE, Castanha?o - CE, Santana do Acarau - CE, Taipu - RN e Sobral - CE e a estac?a?o RCBR da rede IRIS/USGS - GSN. Para a determinac?a?o dos para?metros do modelo realizou-se a inversa?o do tempo de percurso atrave?s de um ajuste de retas aos tempos observados. A validac?a?o deste modelo se deu de modo independente atrave?s da comparac?a?o com outros modelos conhecidos (globais e regionais para o Brasil). O modelo final, nomeado MBB, apresenta um modelo crustal lateralmente homoge?neo composto por duas camadas com crosta superior de 11,45 km de espessura e uma crosta com espessura total de 33,90 km, sendo a base da segunda camada limitada pela descontinuidade de Moho. A velocidade da onda P na crosta superior foi estimada em 6,00 Km/s e na crosta inferior 6,64 Km/s. A velocidade da onda P no manto superior foi estimada em 8,21 Km/s com uma raza?o VP/VS de aproximadamente 1,740 ? 0,002. / In this work it was performed a study to obtain parameters for an 1D regional velocity model for the Borborema Province, NE Brazil. It was used earthquakes occurred between 2001 and 2013 with magnitude greater than 2.9 mb either from epicentres determined from local seismic networks or by back azimuth determination, when possible. We chose seven events which occurred in the main seismic areas in the Borborema Province. The selected events were recorded in up to 74 seismic stations from the following networks: RSISNE, INCT-ET, Jo?o C?mara ? RN, S?o Rafael ? RN, Caruaru - PE, S?o Caetano - PE, Castanh?o - CE, Santana do Acarau - CE, Taipu ? RN e Sobral ? CE, and the RCBR (IRIS/USGS?GSN). For the determination of the model parameters were inverted via a travel-time table and its fit. These model parameters were compared with other known model (global and regional) and have improved the epicentral determination. This final set of parameters model, we called MBB is laterally homogeneous with an upper crust at 11,45 km depth and total crustal thickness of 33,9 km. The P-wave velocity in the upper crust was estimated at 6.0 km/s and 6.64 km/s for it lower part. The P-wave velocity in the upper mantle we estimated at 8.21 km/s with an VP/VS ratio of approximately 1.74.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:29Z No. of bitstreams: 1 NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-29T20:32:49Z (GMT) No. of bitstreams: 1 NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5) / Made available in DSpace on 2016-07-29T20:32:49Z (GMT). No. of bitstreams: 1 NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5) Previous issue date: 2015-08-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A Sequ?ncia Mesodevoniana-Eocarbon?fera da Bacia do Parna?ba, litoestratigraficamente definida como Grupo Canind?, foi reinterpretada empregando-se o modelo b?sico da estratigrafia de sequ?ncias. Para tanto, foram analisados perfis litol?gicos e de raios gama de po?os e linhas s?smicas da regi?o central da bacia, elaborando-se a partir da? diagramas 1D, mapas de is?coras e uma se??o estratigr?fica. Como resultados deste trabalho, foram definidos dois ciclos deposicionais de segunda ordem, referidos como Sequ?ncia Deposicional 1 (SEQ1) e Sequ?ncia Deposicional 2 (SEQ2). A SEQ1, com cerca de 37 Ma, ? limitada abaixo pela Discord?ncia Eodevoniana e equivale ?s forma??es Itaim, Pimenteiras e Cabe?as. A SEQ1 se inicia com o Trato de Sistemas de N?vel Baixo, constitu?do por conjuntos de parassequ?ncias progradacionais em que a parte basal, predominantemente pel?tica, depositou-se em um contexto de prodelta sob influ?ncia de tempestades e a superior ? composta por arenitos de frente deltaica, tendo como limite superior a superf?cie regressiva m?xima. O Trato de Sistemas Transgressivo, depositado acima, ? caracterizado por conjuntos de parassequ?ncias retrogradacionais, compostos predominantemente por pelitos de plataforma rasa, depositados sob a??o de tempestades. A superf?cie transgressiva m?xima, limite superior deste trato, ? posicionada em um n?vel de folhelho cuja radiatividade no perfil de raios gama ? pr?xima a 150 API. O Trato de Sistemas de N?vel Alto apresenta conjuntos de parassequ?ncias progradacionais, compostos por pelitos e arenitos depositados em ambientes plataformal, fl?vio-estuarino e periglacial, tendo como limite superior a Discord?ncia Neodevoniana. A SEQ2, que se segue, compreende um intervalo de cerca de 15 Ma e equivale ? Forma??o Long?. A mesma foi depositada em ambiente plataformal, iniciando com o Trato de Sistemas de N?vel Baixo, caracterizado por um conjunto de parassequ?ncias progradacional, seguido do Trato de Sistemas Transgressivo, de car?ter retrogradacional. O limite superior deste trato corresponde ? superf?cie transgressiva m?xima ou ainda, a fus?o desta superf?cie com o limite de sequ?ncia, que constitui a Discord?ncia Eocarbon?fera, onde a se??o sobreposta foi erodida. Tal se??o, que corresponde ao Trato de Sistemas de N?vel Alto, ? restrita ?s por??es em que a eros?o que originou a Discord?ncia Eocarbon?fera foi menos efetiva, preservando os registros desta unidade. / The Middle Devonian-Early Carboniferous sequence of the Parna?ba Basin, lithostratigraphically defined as Canind? Group, has been reinterpreted using the basic model of sequence stratigraphy. Therefore, lithology and gamma ray well-logs and seismic lines of central portion of the basin were analyzed, producing up from there diagrams 1D, isochore maps and stratigraphic sections. As results of this study, were defined two depositional cycles of second order, referred as Depositional Sequence 1 (SEQ1) and the Depositional Sequence 2 (SEQ2). The SEQ1, with interval about 37 Ma, is limited below by Early Devonian Unconformity and is equivalent to the formations Itaim, Pimenteiras and Cabe?as. The SEQ2, which follows, comprises a range of about 15 Ma and is equivalent to the Long? Formation The SEQ1 starts with the lowstand systems tract, consisting of progradational parasequence set in the basal part, predominantly pelitic, deposited on a prodelta under influence of storms and the upper part consists in sandstones of deltaic front, with the maximum regressive surface on the upper limit. The transgressive systems tract, deposited above, is characterized by retrogradacional parasequence set composed of shallow shelf mudstones, deposited under storm conditions. The maximum flooding surface, upper limit of this tract, is positioned in a shale level whose radioactivity in gammaray well-log is close to 150 API. The highstand systems tract presents progradational parasequence set, comprising mudstones and sandstones deposited in shelf, fluvial-estuarine or deltaic and periglacial environments, with the upper limit the Late Devonian Unconformity. The SEQ2 was deposited in shelf environment, starting with the lowstand systems tract, that is characterized by a progradational parasequence set, followed by the transgressive systems tract, with retrogradational character. The upper limit of the tract corresponding to the fusion between maximum flooding surface with the upper limit of this sequence, which is the Early Carboniferous Unconformity, where the overlapping section was eroded. This section, which corresponds the highstand systems tract is restricted to portions at which the erosion that generate the Early-Carboniferous Unconformity was less effective, preserving the records of this unit.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:25Z No. of bitstreams: 1 RafaelaDaSilvaAlves_DISSERT.pdf: 19927301 bytes, checksum: 8c1484fa0f5034747a0216799c271cc8 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-01T18:59:08Z (GMT) No. of bitstreams: 1 RafaelaDaSilvaAlves_DISSERT.pdf: 19927301 bytes, checksum: 8c1484fa0f5034747a0216799c271cc8 (MD5) / Made available in DSpace on 2016-08-01T18:59:08Z (GMT). No. of bitstreams: 1 RafaelaDaSilvaAlves_DISSERT.pdf: 19927301 bytes, checksum: 8c1484fa0f5034747a0216799c271cc8 (MD5) Previous issue date: 2015-08-21 / A ?rea de estudo est? inserida na Bacia Hidrogr?fica do Rio Pirangi, litoral Oriental do Estado do Rio Grande do Norte, onde est? situada a cidade de Parnamirim. Abrange uma superf?cie de 370 Km?. A expans?o urbana do munic?pio de Parnamirim tem se desenvolvido de forma muito acelerada sem uma estrutura adequada, notadamente pela aus?ncia de rede esgotos, com riscos de contamina??o das ?guas subterr?neas podendo causar s?rios danos ? sa?de p?blica. As ?guas subterr?neas do Sistema Aqu?fero Barreiras na ?rea de interesse constituem a principal fonte de suprimento h?drico das popula??es urbanas e rurais. O uso da ?gua subterr?nea ? feito sem planejamento adequado e assim, importantes ?reas de recarga est?o sendo ocupadas. O presente estudo foi desenvolvido para a quantifica??o do uso e avalia??o das potencialidades das ?guas subterr?neas, tendo em vista o aumento da oferta de ?gua de boa qualidade e com menores riscos de serem afetadas por atividades contaminantes. Com estes objetivos, foram desenvolvidas as seguintes atividades: cadastro de 268 pontos d??gua; caracteriza??o da litologia, espessuras e estrutura hidrogeol?gica do aqu?fero Barreiras, com base na correla??o de perfis de po?os; e, avalia??o de par?metros hidrodin?micos do aqu?fero, a partir da interpreta??o de resultados de testes de bombeamento de po?os. Verificou-se que a espessura saturada cresce de oeste para leste em dire??o ao mar, com valores que variam de 15,47 a 56,5 m, com m?dia de 32,45 m. Os par?metros hidrodin?micos, obtidos com aplica??o do m?todo de Cooper-Jacob foram: transmissividade m?dia de 5,9x10-3 m?/s e a condutividade hidr?ulica m?dia de 2,82x10-4 m/s. A porosidade espec?fica ? de 15%, obtida com aplica??o da equa??o Biecinski. O mapa potenciom?trico mostra a dire??o principal do fluxo subterr?neo, de oeste para leste, e permite identificar as zonas de recarga correspondentes a regi?o dos tabuleiros do ?Barreiras?. Os vales dos rios referem-se ?s zonas de descarga do sistema aqu?fero. A Recarga foi estimada em 253 mm/ano, que corresponde ? taxa de infiltra??o de 16,4%. / The study area is within the Pirangi River Basin, eastern sector of Rio Grande do Norte state, where is located of the Parnamirim city. It has an area of approximately 370 km?. Urbanization has developed much fast without an appropriate infrastructure, mainly by the lack of sewage systems, with risks of contamination of groundwater that may cause serious damage to the health of the population. The Barreiras Aquifer System groundwater in the area represents the main source of water supply for urban and rural populations. The use of groundwater occurs without adequate planning and therefore, important recharge areas are being occupied. This study was conducted to quantify the use and evaluation of the potential of groundwater, in order to increase good water quality supply and lower risks of being affected by polluting activities. With these objectives, the following activities were carried out: 268 points of water have been registered; characterization of the lithological, thickness and hydrogeological structure of the Barreiras aquifer, based on the correlation of well logs; and evaluation of hydrodynamic parameters of the aquifer, from the interpretation of results well pumping tests. It was found that the saturated thickness increases from west to east towards the sea, with values ranging from 15,47-56,5 m with an average of 32,45 m. The hydrodynamic parameters using Cooper-Jacob method were: average transmissivity of 5,9x10-3 m?/s and average hydraulic conductivity 2,82x10-4 m/s. The effective porosity is of 15%, obtained by applying Biecinski equation. The potentiometric map shows the main direction of groundwater flow, from west to east, and identifies the recharge areas corresponding to the region of the tablelands of the "Barreiras". The river valleys refer to the discharge areas of the aquifer system. The Recharge was estimated at 253 mm/year, which corresponds to the 16.4% rate of infiltration.