Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-14T19:53:37Z No. of bitstreams: 1 MaiaraBarbosaFerreira_DISSERT.pdf: 3485311 bytes, checksum: fbbbf4530db04fd7ce1485d24116d239 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-15T23:09:40Z (GMT) No. of bitstreams: 1 MaiaraBarbosaFerreira_DISSERT.pdf: 3485311 bytes, checksum: fbbbf4530db04fd7ce1485d24116d239 (MD5) / Made available in DSpace on 2016-06-15T23:09:40Z (GMT). No. of bitstreams: 1 MaiaraBarbosaFerreira_DISSERT.pdf: 3485311 bytes, checksum: fbbbf4530db04fd7ce1485d24116d239 (MD5) Previous issue date: 2015-05-19 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Os efluentes t?xteis s?o uma mistura complexa de muitos poluentes que cont?m altas cargas org?nicas, cor intensa e compostos t?xicos. A elevada toxicidade do efluente pode ocasionar o aumento da demanda qu?mica (DQO) e bioqu?mica (DBO) de oxig?nio, elevada temperatura, acidez ou alcalinidade, causando danos e problemas ambientais. Al?m de representar uma s?ria amea?a para a sa?de humana este tipo de efluente tamb?m ? bastante t?xico para a maioria dos organismos aqu?ticos. E por esta raz?o, devem-se cumprir os limites de concentra??o para fontes de emiss?o e sistema de esgoto. O presente estudo teve como objetivo investigar o desempenho do tratamento eletroqu?mico de um efluente t?xtil para a remo??o da cor, turbidez, oxig?nio dissolvido (OD) e mat?ria org?nica dissolvida investigando a influ?ncia dos par?metros experimentais, tais como o material eletrocatal?tico (Ti/Pt e Ti/Pt- SnSb) e densidade de corrente, a fim de comparar a sua efici?ncia, o consumo de energia e custo. Os corantes Remazol Yellow 3RS (RY 3RS), Remazol Red RR Gran (RR-RR Gran) e Navy Blue CL-R (NB CL-R) foram utilizados para gera??o de efluente t?xtil laborat?rio simulado. Os resultados mostraram que a aplica??o do processo de oxida??o eletroqu?mica favorece a elimina??o da cor de forma eficiente indepente do material e corrente utilizada, mas a redu??o da mat?ria org?nica foi diretamente dependente do material eletrocatal?tico utilizado e a sua eletroafinidade com as estruturas dos corantes. / The textile effluents are a complex mixture of many pollutants that contain high organic loads, severe color and toxic compounds. The high concentration of the textile effluent may cause increased chemical demand (COD) and biochemical (BOD) of oxygen, elevated temperature, acidity or alkalinity, causing damage and environmental problems. In addition to representing a serious threat to human health such effluent is also quite toxic to most aquatic organisms. And for this reason, one must meet the concentration limits for emission sources and sewage system. This study aimed to investigate the performance of electrochemical treatment of a textile effluent for the removal of color, turbidity, dissolved oxygen (DO) and dissolved organic matter by investigating the influence of experimental parameters such as the electrocatalyst materials (Ti/Pt and Ti/Pt-SnSb) and current density in order to compare their efficiency, energy consumption and cost. The dye Novacron Blue CD (NB) was employed in synthetic solution, while the dyes Remazol Yellow 3RS (RY 3RS) Remazol Red RR Gran (RR-RR Gran) and Navy Blue CL-R (NB CL-R) were used to generate simulated textile effluent laboratory. The results showed that the application of electrochemical oxidation process favors the elimination of color effectively independent the electrocatalytic material and current used, as well as treated effluent. However, the influence of electrocatalytic material was crucial to reduction of the organic matter in all cases.

Made available in DSpace on 2014-12-17T14:57:40Z (GMT). No. of bitstreams: 1 OsvaldoCS.pdf: 1194235 bytes, checksum: da247435df103f473806af70be8f1c3e (MD5) Previous issue date: 2007-06-01 / The study of the physical and mechanic properties is an analysis of unquestioned importance on the production of the ceramic materials. In the region of the Rec?ncavo Baiano, there are ceramic and small brick factories, that still use rudimentary techniques, where the necessity of characterization of raw materials is denounced by the quality of the final product. The present work has for objective to study the behavior of the clay proceeding from the region of the Rec?ncavo, between the cities of Candeias and Cama?ari/Ba, with addition of 5, 10 and 15% by weight of brick scraps, trying to optimize the physic and mechanical properties of the final product, aiming a better possibility of being manufactured, mechanic resistance, low linear retraction and water absorption. The brick scraps and the clay were characterized by FRX, DRX, TG, ATD and the granulometric analysis. Samples for testing where prepared by uniaxial pressing at 25Mpa, in 60x20x5mm size. The evaluated technological properties were: linear retraction, water absorption, apparent porosity and flexural strength. The samples were burned in electric oven in the temperatures of 850?, 950? and 1050?C and compared its mechanical properties and the gresification. With addition of 15% by weight of brick scraps and burning at 900?-1000?C the samples showed properties superior to that clay / O estudo das propriedades f?sicas e mec?nicas ? uma an?lise de import?ncia inquestion?vel na produ??o dos materiais cer?micos. Na regi?o do Rec?ncavo Baiano, encontram-se cer?micas e pequenas olarias, que ainda utilizam t?cnicas rudimentares, onde a necessidade de caracteriza??o das mat?rias-primas ? denunciada pela qualidade do produto final. O presente trabalho tem por objetivo estudar o comportamento da argila proveniente da regi?o do Rec?ncavo Baiano, compreendida entre os munic?pios de Candeias e Cama?ari, com adi??o de 5, 10 e 15% em peso de rejeitos cer?micos, procurando otimizar as propriedades f?sico-mec?nicas do produto final, visando uma melhor trabalhabilidade, resist?ncia mec?nica e baixas retra??o linear e absor??o de ?gua. O rejeito cer?mico e a argila foram caracterizados por FRX, DRX, TG, ATD e analise granulom?trica. Foram preparados corpos-de-prova com dimens?es de 60x20x5mm, por prensagem uniaxial a 25MPa. As propriedades tecnol?gicas avaliadas foram: retra??o linear, absor??o de ?gua, porosidade aparente e resist?ncia mec?nica ? flex?o. Os corpos foram sinterizados em forno resistivo nas temperaturas de 850?, 950? e 1050?C e comparadas suas propriedades mec?nicas e a gresifica??o. Obteve-se para os corpos com incorpora??o de 15% em peso de rejeitos cer?micos, propriedades superiores as da argila, nas temperaturas entre 900? e 1000? C

Made available in DSpace on 2014-12-17T15:36:51Z (GMT). No. of bitstreams: 1 MarciaAFM.pdf: 1370878 bytes, checksum: 51aee5b7941400056788fa2e93d0df1a (MD5) Previous issue date: 2008-03-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The light, besides the vision stimuli, controls other process completely independent of image formation, such as the synchronization of the organismic circadian rhythms to the enviromental light/dark cycle. In mammals, this adjust occurs through the retinohypothalamic tract, a direct retinal projection to the suprachiasmatic nucleus, considered to be the major circadian pacemaker. Early studies have identified only the suprachiasmatic nucleus as a retinal target in the hypothalamus. However, using more sensitive neuroanatomic tracers, other retinorecipient hypothalamic regions outside to suprachiasmatic nucleus were pointed in a great number of mammalian species. In this study, the retinohypothalamic tract was shown in the rock cavy (Kerodon rupestris), an endemic rodent of the semiarid region of the Brazilian Northeast, using unilateral intravitreal injections of cholera toxin subunit b as a neuronal tracer. The results reveal that in the rock cavy, besides the suprachiasmatic nucleus, several hypothalamic regions receive direct retinal projection, such as the ventrolateral preoptic nucleus, medial and lateral preoptic areas, the supraoptic nucleus and bordering areas, anterior, lateral and rectrochiasmatic hypothalamic areas, and the subparaventricular zone. The results are discussed by comparing with those of the literature, into a functional context / A luz, al?m de ser o est?mulo para a vis?o, tamb?m controla processos que s?o completamente independentes da forma??o de imagem, como o ajuste dos ritmos circadianos do organismo ao ciclo claro/escuro ambiental. Em mam?feros, este ajuste ocorre atrav?s do trato retino-hipotal?mico, uma proje??o direta da retina para o n?cleo supraquiasm?tico, o principal marcapasso circadiano. Os trabalhos pioneiros mostraram a proje??o retino-hipotal?mica exclusivamente para o n?cleo supraquiasm?tico. Entretanto, atrav?s do uso de tra?adores neurais mais sens?veis, outras ?reas hipotal?micas retino-recipientes foram apontadas em um amplo n?mero de esp?cies de mam?feros. Neste trabalho o trato retino-hipotal?mico no moc? (Kerodon rupestris), um roedor end?mico da caatinga brasileira, foi demonstrado atrav?s de inje??o intra-ocular unilateral da subunidade b da toxina col?rica como tra?ador neuronal e revela??o imuno-histoqu?mica. Os nossos resultados mostram que, no moc?, al?m do n?cleo supraquiasm?tico, v?rias outras ?reas hipotal?micas recebem proje??o direta da retina, tais como o n?cleo pr?-?ptico ventrolateral, as ?reas pr?-?pticas medial e lateral, o n?cleo supra-?ptico e adjac?ncias, as ?reas hipotal?micas anterior, lateral e retroquiasm?tica e a zona subparaventricular. Os resultados s?o discutidos ? luz dos dados da literatura, dentro de um contexto funcional

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-10-26T21:50:41Z No. of bitstreams: 1 AlineHoracioDaCosta_DISSERT.pdf: 1775959 bytes, checksum: a0dc5dbdf2dd3269222319b8b154c66c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-12-26T16:08:55Z (GMT) No. of bitstreams: 1 AlineHoracioDaCosta_DISSERT.pdf: 1775959 bytes, checksum: a0dc5dbdf2dd3269222319b8b154c66c (MD5) / Made available in DSpace on 2016-12-26T16:08:55Z (GMT). No. of bitstreams: 1 AlineHoracioDaCosta_DISSERT.pdf: 1775959 bytes, checksum: a0dc5dbdf2dd3269222319b8b154c66c (MD5) Previous issue date: 2016-01-27 / A principal caracter?stica para que uma produ??o seja considerada sustent?vel ? assumir que a natureza ? finita, evitando-se desta forma o crescimento sem limites. A busca da sustentabilidade na carcinicultura tem sido uma preocupa??o constante dos ?rg?os ambientais. A utiliza??o de probi?ticos tem sido atualmente apontada como uma eficiente forma de tratamento da mat?ria org?nica presente na coluna d??gua e no solo dos viveiros, possibilitando a minimiza??o da utiliza??o de ?gua nos cultivos, que ? um dos requisitos fundamentais para tornar a carcinicultura ambientalmente respons?vel. Os probi?ticos tamb?m atuam como produto natural na profilaxia das enfermidades, promovendo um melhor crescimento dos organismos aqu?ticos cultiv?veis. Dessa forma, a primeira parte desta pesquisa teve como objetivo avaliar os efeitos de dois probi?ticos comerciais, de diferentes composi??es, sobre o potencial zoot?cnico e resist?ncia a estresse de larvas e p?s-larvas da esp?cie Litopenaeus vannamei cultivadas em escala comercial. A segunda parte investigou as pr?ticas de manejo adotadas pelos micro produtores de camar?o do litoral Sul do Rio Grande do Norte, caracterizando-se tamb?m os aspectos sociais e ambientais da carcinicultura percebidos por esses produtores. Na primeira fase, os cultivos da esp?cie Litopenaeus vannamei tiveram in?cio na fase larval (n?uplio V), com dura??o de 18 dias, quando foram submetidos a dois tratamentos: P1 - probi?tico um; P2 - probi?tico dois. As unidades experimentais consistiram em seis tanques de 15.000 L, com tr?s repeti??es para cada tratamento. Os probi?ticos foram aplicados diariamente conforme recomenda??o dos fabricantes, sendo os par?metros salinidade, temperatura, pH e oxig?nio dissolvido monitorados. As p?s-larvas submetidas ao P2 apresentaram valores m?dios maiores (p < 0,05) para comprimento (em PL 1 e PL 5), pesos ?mido e seco (em PL 5) e percentual de metamorfose (90%) em rela??o ao outro tratamento; as demais vari?veis n?o diferiram. As sobreviv?ncias finais foram 56,4% e 64,9% para p?s-larvas submetidas ao P1 e ao P2, respectivamente. Observou-se que o probi?tico 2 foi mais efetivo na melhoria dos par?metros bi?ticos. Na segunda fase, foram realizadas 27 entrevistas atrav?s de formul?rios semi-estruturados, com produtores do litoral Sul do Rio Grande do Norte. Constatou-se que 85,2% dos produtores s?o homens, com baixa taxa de analfabetismo (3,7%), com renda de 2 a 5 sal?rios m?nimos (44,4%) e que 22,2% t?m a carcinicultura como principal fonte de renda. Verificou-se que menos de 50% receberam assist?ncia t?cnica no ?ltimo ano e poucas s?o as medidas de biosseguran?a adotadas pelos mesmos. Com rela??o ?s boas pr?ticas de manejo recomendadas pela Associa??o Brasileira de Produtores de Camar?o (ABCC), apenas 11,1% dos carcinicultores fazem uso de probi?ticos e essa vari?vel n?o possui rela??o com a renda mensal familiar ou ainda com as taxas de sobreviv?ncia obtidas nos cultivos. Pr?ticas de manejo como fertiliza??o da ?gua e calagem do solo, assim como questionamentos sobre a problem?tica ambiental tamb?m n?o apresentaram rela??o com a escolaridade, havendo um manejo homog?neo entre os entrevistados. As micro propriedades produtoras de camar?o, representativas da regi?o do litoral Sul do Rio Grande do Norte, apontam a necessidade de orienta??o e apoio do governo e da devida assist?ncia t?cnica para que possam implementar boas pr?ticas de manejo, de forma a se adequar ? carcinicultura respons?vel recomendada pela ABCC. / The main feature for a production to be considered sustainable is to assume that nature is finite, avoiding thus the unlimited growth. The search of the sustainability in shrimp farming has been a constant preoccupation of environmental agencies. The use of probiotics have been currently appointed as an efficient means of treating of the organic matter in the water column and ponds soil, allowing to minimize the use of water in farming, which is one of the fundamental requirements to make shrimp farming environmentally responsible. Probiotics also act as a natural product for prophylaxis of diseases, promoting better growth of the cultivable aquatic organisms. Thus, the first part of this research had purpose to evaluate the effects of two commercial probiotics, which different compositions, on the zootecnical potential and resistance to stress of larvae and post-larvae of the species Litopenaeus vannamei in commercial scale. The second part investigated management practices adopted by micro producers of shrimp in the southern coast Rio Grande do Norte, also characterize the social and environmental aspects of shrimp farming perceived by these producers. In the first phase, In the first phase, the cultivates of the species Litopenaeus vannamei began in the larval stage (nauplius V), with duration of 18 days, this time submitted for two treatments: P1 - probiotic one; P2 - two probiotic. The experimental units consisted of six tanks of 15,000 L, and each treatment had three repetitions. The probiotics were applied daily as recommended by the manufacturers, and the parameters salinity, temperature, pH and dissolved oxygen monitored. The post-larvae submitted to P2 had higher mean values (p <0.05) in length (in PL 1 and PL 5), wet and dry weights (PL 5) and metamorphosis percentage (90%) when compared to the other treatment; the other variables did not differ. The final survivals were 56.4% and 64.9% for postlarvae submitted to P1 and P2, respectively. It was observed that the probiotic 2 more effective in the improvement of the biotic parameters. In the second phase, 27 interviews were conducted through of semistructured questionnaires, with producers of the South coast of Rio Grande do Norte. It was found that 85.2% of the producers are men, with low illiteracy rate (3.7%), earning 2 to 5 minimum wages (44.4%) and 22.2% have shrimp farming as main source of income. It was found that less than 50% received technical assistance in the last year and few are the biosecurity measures adopted by them. With regard to good management practices recommended by the Brazilian Association of Shrimp Farmers (ABCC), only 11.1% of shrimp farmers make to use of probiotics and this variable has no relationship with the monthly family income or with survival rates obtained in cultivation. Management practices such as water fertilizing and soil liming, as well as questions about the environmental problems also not associated with schooling, with a homogeneous management among interviewed. The micro properties producers of shrimp, representative of the region of the South coast of Rio Grande do Norte, point the need of guidance and support of the government and appropriate technical assistance to enable them to implement good management practices, in order to suit the shrimp responsible recommended by the ABCC.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-10T12:12:36Z No. of bitstreams: 1 LucianaAraujoNascimento_TESE.pdf: 3313657 bytes, checksum: 8d85adb333c8ffbf5a14771e4ac06475 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-11T11:48:21Z (GMT) No. of bitstreams: 1 LucianaAraujoNascimento_TESE.pdf: 3313657 bytes, checksum: 8d85adb333c8ffbf5a14771e4ac06475 (MD5) / Made available in DSpace on 2017-01-11T11:48:21Z (GMT). No. of bitstreams: 1 LucianaAraujoNascimento_TESE.pdf: 3313657 bytes, checksum: 8d85adb333c8ffbf5a14771e4ac06475 (MD5) Previous issue date: 2016-02-24 / O objetivo do trabalho ? observar o efeito da purifica??o da quitosana (Qt) sobre a forma??o de filmes automontados utilizando complexos inorg?nicos: Na2[Fe(CN)5NO] (NPS) e cis-[Ru(bpy)2ImN(NO)](PF6)3 (RubpyNO), caracteriz?-los pelas t?cnicas de Uv-V?s, Infravermelho e voltametria c?clica. A Quitosana comercial foi purificada em tr?s diferentes formas: neutra, cloridrato e acetato. A caracteriza??o dessas apresentaram diferen?as significativas com rela??o as suas caracter?sticas como umidade, grau de desacetila??o, viscosidade e massa molar. Foi realizado o monitoramento pela t?cnica de Uv-vis do crescimento dos filmes de QtNeutra/NPS; QtAcetato/NPS; QtCloridrato/NPS; QtNeutra/ RubpyNO; QtAcetato/ RubpyNO e QtCloridrato/ RubpyNO. Dentre eles, a quitosana purificada na forma acetato mostrou melhor intera??o com os complexos, formando filmes com melhores ?ndices de correla??o R e deposi??o homog?nea dos materiais a cada bicamada formada. Essa intera??o foi confirmada pela an?lise do espectro do infravermelho dos filmes que apresentou bandas de ambos os compostos. Os estudos eletroqu?micos mostraram que os filmes formados possuem grande estabilidade, melhor resolu??o quando analisados a uma taxa de varredura de 50 mV.s-1 e que as amostras QtNeutra e QtAcetato com NPS apresentam os potenciais de pico melhores definidos sofrendo processos quase revers?veis de degrada??o. Os testes de rea??o de ?cido asc?rbico com os filmes de QtAcetato/NPS e QtAcetato/ RubpyNO mostraram que o primeiro apresentou uma melhor resposta eletroqu?mica. / Chitosan (Qt) has great technological application due to present atoxic features, biodegradable and renewable. The fact that a cationic polymer makes it capable of forming films by selfassembly technique, allowing its interaction with various compounds. In this context, this study aimed to evaluate the influence of purification of Qt in the neutral, acetate and hydrochloride forms in building self-assembled films by their interaction with nitrosyl complex (SNP and RubpyNO). Analysis of the degree of deacetylation, viscometry, infrared and thermal analysis showed that the purified Qt have different characteristics. The formation of the films was monitored by spectroscopy in the Uv-Vis region and characterized through spectroscopic techniques infrared (FTIR), thermal analysis (TG/DTG), cyclic voltammetry (CV), scanning electron microscopy (SEM) and energy dispersive X-ray (EDS). The results showed that Qt neutral and acetate forming films linear and homogeneous growth, with the interaction of both materials confirmed by FTIR technique. The results show that cyclic voltammetry of the neutral and acetate Qt films and the complex behave as semi-reversible processes, except the film QtAcetato/RubpyNO, which presents itself as an irreversible process. It was observed that chitosan affects the purification method presented in the redox process for the films due to the shape of weaker or stronger interaction of the particles according to the load presented by polycations and polyanions in solution during the formation of automounted film. The images obtained by SEM and EDS confirmed the presence of layers arranged with uniform coverage and homogeneous distribution of the elements in the film surface. The TG/DTG analysis confirmed thermal stability of the films before and after being subjected to VC. Reaction rolls of film with ascorbic acid (AA) and cysteine showed that the film QtNeutra/RubpyNO showed the best response to both substances. A straight line equation has been suggested for the determination of AA by QtNeutra/RubpyNO film and for the determination of cysteine, additional studies are required.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-12T13:44:03Z No. of bitstreams: 1 ThiagoVasquesDeSouza_DISSERT.pdf: 2115756 bytes, checksum: 3e6dfd05005f83b2fb41d4caa8e343d8 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-17T11:45:14Z (GMT) No. of bitstreams: 1 ThiagoVasquesDeSouza_DISSERT.pdf: 2115756 bytes, checksum: 3e6dfd05005f83b2fb41d4caa8e343d8 (MD5) / Made available in DSpace on 2017-01-17T11:45:14Z (GMT). No. of bitstreams: 1 ThiagoVasquesDeSouza_DISSERT.pdf: 2115756 bytes, checksum: 3e6dfd05005f83b2fb41d4caa8e343d8 (MD5) Previous issue date: 2016-07-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os espessantes de l?tex acr?lico ?lcali-sol?veis s?o amplamente utilizados em atividades como fabrica??o de revestimento, cosm?ticos, ind?stria do petr?leo e t?xtil. Eles t?m a fun??o de aumentar a viscosidade aparente do meio, como resultado da neutraliza??o dos grupos carboxila presentes nas part?culas do l?tex. Os espessantes acr?licos hidrofobicamente modificados (HASE) atualmente s?o os mais utilizados como modificadores de reologia e as t?cnicas de reometria s?o o principal m?todo utilizado para monitorar a atividade reol?gica e efici?ncia destas subst?ncias. Nesta disserta??o, propomos o uso de espalhamento din?mico de luz (DLS) como m?todo complementar para obter par?metros quantitativos como taxa de relaxa??o caracter?stica m?dia e largura de distribui??o assim como correlacion?-los com o aumento da viscosidade e a neutraliza??o dos grupamentos carboxila. A partir de an?lise de dados obtidos com a utiliza??o de t?cnicas tradicionais de caracteriza??o como reometria, condutividade e turbidez em compara??o com a t?cnica de espalhamento din?mico de luz (DLS). Identificou-se uma concentra??o cr?tica de ?ons OH- para a neutraliza??o dos grupos carboxila. Foi poss?vel ainda, a partir dos dados de taxa de relaxa??o m?dia ter um melhor entendimento do mecanismo de espessamento deste tipo de pol?mero. / The alkali soluble latex thickeners are extensively used in activities such as coating manufacturing, cosmetics, oil and textile industry. They increase apparent viscosity as a result of neutralization of carboxyl groups in latex particles. The Hydrophobic alkali soluble emulsion (HASE), currently are the thickener most used to increase the material?s rheology and the rheometry techniques is the main method used to monitor the rheological activity of these substances and its efficiency. In this work, we propose the use of dynamic light scattering (DLS) as an additional method to get quantitative parameters like characteristic relaxation rate and distribution width to correlate them to viscosity increase and carboxylic groups neutralization. We got the information obtained from traditional characterization methods as rheometry, conductivity and turbidity to compare with dynamic light scattering parameters. The critical OH- ions concentration was identified using the information about the carboxylic groups neutralization and we could to get more information about this polymer thickening process using de Dynamic Light Scattering for a better understanding about this mechanism.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T19:18:35Z No. of bitstreams: 1 HeryzanyaAlvesRamalho_DISSERT.pdf: 1795343 bytes, checksum: 8f08a3a27bc7b5e5a9cf73d6d9a04ebc (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-21T21:01:07Z (GMT) No. of bitstreams: 1 HeryzanyaAlvesRamalho_DISSERT.pdf: 1795343 bytes, checksum: 8f08a3a27bc7b5e5a9cf73d6d9a04ebc (MD5) / Made available in DSpace on 2017-03-21T21:01:07Z (GMT). No. of bitstreams: 1 HeryzanyaAlvesRamalho_DISSERT.pdf: 1795343 bytes, checksum: 8f08a3a27bc7b5e5a9cf73d6d9a04ebc (MD5) Previous issue date: 2016-12-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Este estudo qualiquantitativo se prop?e a analisar escolhas l?xico-gramaticais realizadas em 18 textos escritos do g?nero Discussion produzidos por nove alunos de um instituto de idiomas pertencente a uma universidade federal no nordeste do Brasil. Os textos foram gerados em uma turma de ingl?s n?vel IV e em uma turma de conversa??o em dois momentos no decorrer de 2015.2 e submetidos ? an?lise qualitativa por meio do sistema de transitividade proposto pela lingu?stica sist?mico-funcional (HALLIDAY, 1994; EGGINS, 2004; HALLIDAY; MATTHIESSEN, 2014). Na an?lise quantitativa, utilizou-se a ferramenta Wordsmith Tools 5.0 (SCOTT, 2010) para identificar e quantificar os processos e os participantes das ora??es. Os resultados mostram que os processos mais usados na turma de n?vel IV foram is/are, like e have enquanto os processos mais recorrentes na turma de conversa??o foram is/are, think e do. Na primeira turma, o processo like sugere que os alunos concebem os assuntos tratados como quest?es de prefer?ncia pessoal enquanto, na segunda turma, o processo think revela a interpreta??o dos temas como quest?es de cren?as pessoais. Quanto aos participantes nas ora??es, as maiores recorr?ncias da turma de n?vel IV foram people, weekend, I e we, enquanto we, waste, problem, garbage, you e women foram mais recorrentes na turma de conversa??o. O uso recorrente de I na primeira turma mostra a estrat?gia dos alunos de se revelarem como autores a fim de expressarem sua opini?o. Por outro lado, na segunda turma, o uso de you consiste numa estrat?gia para chamar a aten??o do leitor diretamente. Tais resultados mostram que a identifica??o e a an?lise dos participantes e dos processos nas ora??es por meio da transitividade s?o feedback ?til para os alunos, seja na reescrita ou na produ??o de novos textos. / This qualiquantitative study analyzes lexicogrammatical choices realized in 18 written texts from the Discussion genre produced by nine students of a language institute at a federal university in Northeastern Brazil. The texts were generated in a Level IV English class and in a conversation class in two moments in 2015.2 and submitted to a qualitative analysis by using the transitivity system proposed by systemic-functional linguistics (HALLIDAY, 1994; EGGINS, 2004; HALLIDAY; MATTHIESSEN, 2014). In the quantitative analysis, we used the Wordsmith Tools 5.0 (SCOTT, 2010) program to identify and quantify the processes and the participants of the clauses. The results show that the most frequent processes in the level IV class were is/are, like and have whereas the most frequent processes in the conversation class were is/are, think, and do. In the first class, the process like suggests that the students conceive the subjects in question as matters of personal preference while, in the second class, the process think reveals the interpretation of the themes as matters of personal beliefs. Regarding the participants in the clauses, the more frequent recurrences in the level IV class were people, weekend, I and we, while we, waste, problem, garbage, you and women were more recurrent in the conversation class. The recurrent use of I in the first class shows the strategy of the students in revealing themselves as authors to express their opinions. On the other hand, in the second class, the use of you consists of a strategy to call the reader?s attention directly. These results show that the identification and the analysis of participants and processes in the clauses by means of transitivity are useful feedback for the students when rewriting or producing new texts.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T19:31:23Z No. of bitstreams: 1 RogerioPereiraDeQueiroz_DISSERT.pdf: 2044372 bytes, checksum: 84f05f3061b292c5a47b28fb9bdebc12 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-22T00:05:51Z (GMT) No. of bitstreams: 1 RogerioPereiraDeQueiroz_DISSERT.pdf: 2044372 bytes, checksum: 84f05f3061b292c5a47b28fb9bdebc12 (MD5) / Made available in DSpace on 2017-03-22T00:05:51Z (GMT). No. of bitstreams: 1 RogerioPereiraDeQueiroz_DISSERT.pdf: 2044372 bytes, checksum: 84f05f3061b292c5a47b28fb9bdebc12 (MD5) Previous issue date: 2016-08-22 / A agarose ? um pol?mero natural extra?do de algas que possui a propriedade de formar g?is f?sicos, quando retirado calor do sistema. Essa propriedade possui grande aplicabilidade nas ind?strias aliment?cia e farmac?utica, principalmente em an?lises de DNA. Para esse trabalho, foram preparadas solu??es aquosas em concentra??es diferentes de agarose. Medidas de espalhamento din?mico de luz foram feitas, enquanto se alterava a temperatura do sistema, a fim de obter estruturas mais ou menos organizadas das macromol?culas. Para as medidas de espalhamento, a equa??o Kohrausch-William-Watts (KWW) foi ajustada aos dados, de modo a obter a taxa de relaxa??o m?dia do processo. Adicionalmente, foram feitos testes de reologia das amostras, tamb?m com a varia??o da temperatura. Para ambas as t?cnicas, foram feitos ajustes matem?ticos, com a inten??o de estudar a transi??o h?lice-novelo das cadeias polim?ricas no decorrer da altera??o da temperatura, relacionando-as atrav?s do c?lculo da energia de ativa??o aparente do processo. Nas duas abordagens foi constatado que a energia tende a diminuir para solu??es dilu?das e para altas temperaturas. / The agarose is a natural polymer extract from red algae (Rhodophyceae). This polysaccharide can form physical gels when is removed heat from the system. This property has great applicability in the food and pharmaceutical industries, particularly in DNA analysis. For this work we prepared aqueous solutions at different concentrations of agarose. Measures of Dynamic Light Scattering (DLS) were made while the system temperature was altered so as to obtain structures more or less organized of macromolecules. For DLS measurements, the Kohrausch-William-Watts equation (KWW) was fitted to the data to obtain the average of relaxation rate of the process. Additionally rheometry tests were made also with the temperature variation. For both techniques, were made mathematical adjustments with the intention of studying the helix-coil transition of the polymer chains during the temperature change, relating them by calculating the apparent activation energy. In both approaches it was found that energy tends to decrease for dilute solutions and higher temperatures.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T20:15:19Z No. of bitstreams: 1 KleidsonDanielMedeirosLeopoldino_DISSERT.pdf: 4143386 bytes, checksum: b8b4f6ceb0032654381facae637bb32d (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-22T21:40:36Z (GMT) No. of bitstreams: 1 KleidsonDanielMedeirosLeopoldino_DISSERT.pdf: 4143386 bytes, checksum: b8b4f6ceb0032654381facae637bb32d (MD5) / Made available in DSpace on 2017-03-22T21:40:36Z (GMT). No. of bitstreams: 1 KleidsonDanielMedeirosLeopoldino_DISSERT.pdf: 4143386 bytes, checksum: b8b4f6ceb0032654381facae637bb32d (MD5) Previous issue date: 2016-05-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Compreendida enquanto uma habilidade, e presente em diferentes n?veis no ser humano a criatividade pode ser estimulada de forma espont?nea e n?o-espont?nea. Espontaneamente a partir da intera??o entre fatores intr?nsecos (indiv?duo) e extr?nsecos (ambientais). J? em sua forma induzida, por meio de t?cnicas de criatividade, ferramentas de facilita??o que visam fomentar pensamentos originais para resolver problemas por meio da sistematiza??o da idea??o em etapas. Neste sentido, a disserta??o tem como objetivo - propor uma t?cnica de criatividade para a gera??o de ideias de empresas de base tecnol?gica. O desenvolvimento da t?cnica teve como base te?rica os seguintes temas: gera??o de ideias, criatividade coletiva e t?cnicas de criatividade. Na pesquisa de campo o m?todo utilizado foi a pesquisa-a??o, a partir de quatro interven??es junto a estudantes de gradua??o e p?s-gradua??o em engenharia da Universidade Federal do Rio Grande do Norte. Cada interven??o teve quatro fases: planejamento, interven??o, an?lise e melhoria. Em cada interven??o aprimorou-se a t?cnica e, como resultado surge a IDEATION, na qual cada letra representa uma, dentre suas oito etapas: Identify the Creative Profile, Develop Empathy, Explore the Group Imagination, Attend to the Guidelines, Think and Speak, Involve to the Theme, Obtain Ideas e Nurture the Ideas. / The present work has as objective - propose a creative technique for the generation of ideas to technology-based companies. In many spheres of economy creativity figures as an important issue, because of the increasing complexity of solutions required in situations and scenarios marked by volatility, lack of models and breaking others. In the corporate world it is precisely in this field where the search for innovation becomes a competitive factor. However, to innovate, there must be creativity, a force that drives innovation and bases its quality and differentials face to the challenges of a networked world. Understood as a skill, and present at different levels in humans, when combined with attitude and entrepreneurial action, creativity is able to produce changes that adds or breaks with the current structure. The technique development had as theoretical basis the following themes: ideas generation, collective creativity and creativity techiniques. In the field research the method used was the action research, from four interventions along with graduation and post graduation students in engineering from Universidade Federal do Rio Grande do Norte. Each intervention have four different stages: planning, intervention, analisys and improvement. In each intervention the technique was improved and as result comes up the IDEATION, in which, each letter represents, one of its eight steps: Identify the Creative Profile, Develop Empathy, Explore the Group Imagination, Attend to the Guidelines, Think and Speak, Involve to the Theme, Obtain Ideas e Nurture the Ideas.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T20:52:32Z No. of bitstreams: 1 RafaelBeserraNelson_DISSERT.pdf: 4160512 bytes, checksum: baae9c44370c5c37e41ad86cfb4b3918 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-06T22:06:07Z (GMT) No. of bitstreams: 1 RafaelBeserraNelson_DISSERT.pdf: 4160512 bytes, checksum: baae9c44370c5c37e41ad86cfb4b3918 (MD5) / Made available in DSpace on 2017-04-06T22:06:07Z (GMT). No. of bitstreams: 1 RafaelBeserraNelson_DISSERT.pdf: 4160512 bytes, checksum: baae9c44370c5c37e41ad86cfb4b3918 (MD5) Previous issue date: 2014-12-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A quest?o ambiental est? cada vez mais em pauta, seja na vida cotidiana ou no ambiente de trabalho. Para que essas abordagens passem a ser utilizadas como estrat?gias, se faz necess?rio demonstrar sua influ?ncia na competitividade das empresas. O objetivo deste trabalho ? avaliar o impacto quantitativo das estrat?gias ambientais na competitividade de uma empresa do setor petroqu?mico. A partir dessa mensura??o torna-se poss?vel demonstrar a contribui??o efetiva das estrat?gias ambientais para a competitividade, incentivando o uso dessas estrat?gias e disseminando o paradigma da sustentabilidade. Este trabalho consiste num estudo de caso, com abordagem quanti e qualitativa, e desenvolveu-se por meio de question?rio aplicado aos tomadores de decis?o da empresa. A an?lise estat?stica dos dados coletados permitiu identificar a estrat?gia ambiental que mais influencia na competitividade da empresa. Tamb?m foram reveladas as estrat?gias mais importantes para cada um dos fatores competitivos: de fornecimento, financeiros, mercadol?gicos, e de processos internos. Enfim, foi realizada a mensura??o real da influ?ncia das estrat?gias ambientais na competitividade de uma organiza??o, classificando essas estrat?gias ambientais e fornecendo dados concretos para a utiliza??o dessas estrat?gias na tomada de decis?o da empresa. / Environmental issues are increasingly on the agenda, whether in daily life or in the workplace. For these approaches start to be used as environmental strategies, it is necessary to demonstrate the influence of these approaches on business competitiveness. This study aims to assess the quantitative impact of environmental strategies in the competitiveness of a petrochemical company. From that measurement, it is possible to demonstrate the effective contribution of environmental strategies for competitiveness, encouraging the use of these strategies and disseminating the sustainability paradigm. This paper is a case study with both quantitative and qualitative approaches, and was developed through a questionnaire applied to the decision makers of the company. Statistical analysis of collected data allowed the identification of the environmental strategy that most influences the competitiveness of the company. The study also revealed the most important strategies for each of the competitive factors: supply, financial, marketing, and internal processes. This work enabled the real measurement of the influence of environmental strategies in the competitiveness of an organization, classifying these environmental strategies and providing concrete data for the use of these strategies in the company's decision-making.