Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-09T21:56:36Z No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-10T17:34:06Z (GMT) No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) / Made available in DSpace on 2017-02-10T17:34:07Z (GMT). No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) Previous issue date: 2016-08-15 / O presente trabalho foi realizado com a finalidade de observar a aplica??o do tratamento eletrocin?tico e o comportamento de seus fen?menos (eletr?lise, eletro-osmose, eletromigra??o e eletroforese) na descontamina??o de solos carbon?ceo contaminado por componentes ex?geno. Para a comprova??o desta, foi realizada uma s?rie de experimentos para determina??o de melhor volume para trtamento, assim modificando as c?lulas eletrocin?ticas utilizadas. Os experimentos foram realizados em c?lula com volumes internos diferentes, variando de 0.2 L, 1.5 L e 3.0 L, variando assim o volume para melhor comprotar as amostras, desta forma favorecendo a defini??o de uma c?lula com melhor rendimento para o experimental. Em ambos os experimentos desenvolvidos o solo foi contaminado com concentra??es diferentes de petr?leo bruto da forma??o Umburana, variando entre 500 mg/L a 2500 mg/L, desta maneira constituindo a matriz sedimentar carbon?fera contaminada. Para configura??o da amostra utilizou-se de uma quantidade de sedimento com peso variando entre 0,05 Kg, 0.8 Kg e 1,5 Kg de rocha sedimentar carbon?fera macerada, o processamento foi feito para que esta atigisse uma fra??o granulometrica de 35# (mesh) ou 0.5 mm. A s?rie de experimentos ser? discutida em tr?s grandes unidades; Experimentos preliminares, interm?diarios e finais nos quais se consolidou uma metodologia para o Remedia??o Eletrocin?tica de Solos (RES) com maior rendimento devido s interferencias construtivas da propria c?lula utliada. Os eletrodos utlizados para a remedia??o foram o ?nodo Dimensionalmente Estavel (DSA) de Rut?nio-Tit?nio-?xido (Ti/Ru0,34Ti0,66O2) e eltrodos de Gr?fite Carbono (gr?fite sp2) aplicando diferentes correntes eletricas. A elimina??o dos compostos org?nicos foi monitorada mediante Carbono Org?nico Total (COT), Potencial Zeta (?) e medidas espectrofotom?tricas (UV-Vis?vel). Tamb?m foram feitas medida de potencial Hidrog?nio-i?nico (pH), condutividade (S/cm), e volume de vaporiza??o do eletr?lito utilizado (Na2SO4). Os resultados indicaram descontamina??o do meio entre 50% a 80% com baixo custo de 0.04 Real/kWh, sendo um bom percentual para remo??o de derivados de petroleo em solo. Os testes duraram entre 72 h a 480 h e foi verificada a remo??o de poluentes org?nicos nos compartimento cat?dico e an?dico, e com provavel carga de metais pesado. O potencial zeta indicou que os compostos org?nicos s?o transportados devido aos fen?menos de eletromigra??o e eletro-osmose, e confirma que o tamanho das part?culas varia ao decorrer do tempo de descontamina??o, formando assim ?cluster? de part?culas eletricamente carregadas que em sua grande maioria det?m carga negativa. A eletr?lise dos eletr?litos favoreceu a forma??o de um gradiente de pH, formando assim uma frente ?cida/b?sica constatada por n?lise dos eletrolitos nos reserv?torios, esta permitindo um aumento na mobilidade dos contaminantes do solo para os reservatorios. O efluente residual contaminado com petr?leo, tamb?m foi tratado com ox?da??o an?dica utlizando de eletrodo de dimanete dopado com boro (DDB) e densidades de corrente de 20 e 60 mA/cm2, os n?veis finais de descontamina??o atingido pelo tratamento acoplado foram de 80% no residual do efluente, definindo um alto n?vel de descontamina??o. / This work was carried out with the purpose of observing the application of electrokinetic treatment and behavior of its phenomena (electrolysis, electro-osmosis, electromigration and electrophoresis) in the decontamination of carbonaceous soils contaminated by exogenous components. To test this, a series of experiments was performed to determine the best volume treatment thus modifying electrokinetic cells used. The experiments were performed in cells with different internal volumes ranging from 0.2 L, 1.5 L and 3.0 L, thus varying the volume to better comprotar samples thus favoring the development of a cell with better performance for the experiment. In both experiments developed soil was contaminated with different concentrations of crude oil from the formation Umburana ranging from 500 mg/L to 2500 mg/L, thus constituting the contaminated sediment coal matrix. For configuration of the sample used is an amount of sediment weighing between 0.05 kg, 0.8 kg and 1.5 kg of coal sedimentary rock macerated, processing was done so that is reached one granulometric fraction of 35 # (mesh ) or 0.5 mm. A series of experiments will be discussed in three main units; Preliminary experiments, intermediate and final in which consolidated a methodology for Electrokinetic Remediation of Soils (RES) with higher yield due to constructive interference of s own utliada cell. The utlizados electrodes for remediation were Dimensionally Stable Anode (DSA) of ruthenium-titanium-oxide (Ti/Ru0,34Ti0,66O2) and electrodes of graphite carbon (graphite sp2) applying different currents eletricas. The removal of organic compounds was monitored by Total Organic Carbon (TOC), Zeta potential (?) and spectrophotometric measurements (UV-Visible). They were also made Hydrogen ion-potential measurement (pH), conductivity (mS/cm) and the volume of vaporization of the electrolyte used (Na2SO4). The results indicated decontamination of the medium between 50% to 80% with low cost 0.04 Real/kWh, with a good percentage for removal of oil derivatives on the ground. The tests lasted between 72 h to 480 h and checked for removal of pollutants in the cathodic and anodic compartment, with possible load heavy metals. The zeta potential indicated that the organic compounds are transported due to electromigration and electro-osmosis phenomena, and confirms that the particle size varies during the decontamination time, thus forming "cluster" of electrically charged particles that mostly holds negative charge. Electrolysis of electrolyte favors the formation of a pH gradient, thus forming an acid/base face detected by analysis of the electrolyte in the reservoirs, it is enabling an increase in mobility of soil contaminants to the reservoirs. The residual effluent contaminated with oil, has also been treated with anodic oxidation utlizando of electrode the dimond doped with boron (DDB) and current densities of 20 and 60 mA/cm2, the final levels of decontamination achieved by coupled treatment were 80% in the residual effluent defining a high level of decontamination.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-13T19:30:59Z No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-14T18:58:51Z (GMT) No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) / Made available in DSpace on 2017-02-14T18:58:51Z (GMT). No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) Previous issue date: 2016-08-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / As rochas naturais usadas em ensaios de recupera??o avan?ada de petr?leo apresentam alto custo de obten??o, s?o anisotr?picas e, al?m disso, h? a necessidade de realiza??o de v?rios ensaios para estudos detalhados de algum m?todo de recupera??o avan?ada. Por esta causa, este estudo consistiu na obten??o de arenitos sint?ticos feitos a partir de areia da praia e argila cer?mica que tivessem propriedades semelhantes ?s de rochas naturais. Para isto, variaram-se a concentra??o de argila (20 a 40%, em massa), a press?o de compacta??o (100 a 200 kgf/cm2) e a temperatura de sinteriza??o (850 a 950 ?C) e foi feito um planejamento fatorial 23 com triplicata no ponto central, com o aux?lio do software Statistica 8.0. Tamb?m foram realizadas an?lises de composi??es qu?mica e mineral?gica dos materiais, de reologia dos fluidos e de recupera??es convencionais de petr?leo. Os resultados mostraram que aumentos na press?o de compacta??o, concentra??o de argila e a redu??o da temperatura causam redu??o da porosidade e permeabilidade e aumento na resist?ncia ? compress?o uniaxial. Os modelos gerados para estas vari?veis-resposta s?o significativos e preditivos, descrevendo satisfatoriamente o conjunto de dados, os quais tiveram boa reprodutibilidade. O arenito sint?tico AS 10 foi escolhido para os ensaios de recupera??es convencionais de petr?leo por apresentar maior resist?ncia ? compress?o uniaxial e por ter permeabilidade semelhante ? do arenito Berea, o mais usado em ensaios de recupera??o avan?ada em todo o mundo. Os ensaios de recupera??es convencionais com o AS 10 mostraram a rela??o inversa entre a viscosidade do petr?leo e o fator de recupera??o. Al?m disso, os fatores de recupera??es convencionais ficaram pr?ximos aos de ensaios com arenitos naturais que usaram petr?leo com viscosidade semelhante. / The natural rocks used for studying enhanced oil recovery (EOR) are expensive to acquire and are also anisotropic. Moreover, any detailed study on enhanced recovery requires several tests. For those reasons, this work consisted on obtaining synthetic sandstones composed of beach sand and ceramic shale, both with properties similar to those found in natural rocks. In order to do so, variations were performed on shale concentration (from 20 to 40% in weight), on compaction pressure (from 100 to 200 kgf/cm2) and on syntherization temperature (from 850 to 950 ?C), and a 2? factorial design with centerpoint triple replicates was done, using the Statistica 8.0 software. Experiments aiming to analyse the material chemical and mineralogical compositions, the fluids rheology and the conventional oil recovery were also performed. The results showed that increases in compaction pressure and in shale concentration and decreases in temperature lead to decreases in porosity and permeability and to increases in resistance to uniaxial compression. The models generated to theses response variables are meaningful and predictive, describing accurately the data, which presented a good reproducibility. The AS 10 synthetic sandstone was used for the conventional oil recovery experiments mainly for having the greatest resistance to uniaxial compression and for displaying permeability similar to the Berea sandstone, which is the most used in enhanced recovery worldwide. The conventional oil recovery experiments using the AS 10 showed the inverse relationship between oil viscosity and recovery factor. Furthermore, the conventional recovery factors found were similar to those from natural sandstone performed with oil having a similar viscosity.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-22T20:36:09Z No. of bitstreams: 1 PenhaPatriciaCabralRibeiro_DISSERT.pdf: 1578986 bytes, checksum: 51504d11d1a9fe396107352885277ec3 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-08T23:09:25Z (GMT) No. of bitstreams: 1 PenhaPatriciaCabralRibeiro_DISSERT.pdf: 1578986 bytes, checksum: 51504d11d1a9fe396107352885277ec3 (MD5) / Made available in DSpace on 2017-03-08T23:09:25Z (GMT). No. of bitstreams: 1 PenhaPatriciaCabralRibeiro_DISSERT.pdf: 1578986 bytes, checksum: 51504d11d1a9fe396107352885277ec3 (MD5) Previous issue date: 2016-11-11 / A faveleira (Cnidoscolus quercifolius) possui sementes oleaginosas que podem ser utilizadas para obten??o de ?leo vegetal. Uma das formas de obten??o do ?leo ? por meio da prensagem a frio, processo no qual, obt?m-se, tamb?m, um coproduto chamado de torta. A semente e seus derivados t?m potencial para ser utilizados na alimenta??o humana, e em virtude disso, o presente trabalho objetivou avaliar as caracter?sticas f?sico-qu?micas do ?leo da semente de faveleira e investigar as propriedades bioativas da semente, da torta e do ?leo. Para tanto, as sementes foram prensadas e as seguintes an?lises foram realizadas: caracteriza??o f?sico-qu?mica (?cido graxo livre, ?ndice de per?xido, umidade e mat?ria vol?til, densidade e viscosidade) e perfil lip?dico do ?leo; conte?do fen?lico total e flavonoides totais na semente e na torta; atividade antibacteriana e atividade antioxidante (atividade de inibi??o do radical DPPH, teste do poder redutor, capacidade antioxidante total, sequestro do ?on super?xido e capacidade de sequestro dos radicais oxigenados) na semente, no ?leo e na torta. O ?leo da semente de faveleira tem baixa acidez (0,78 ? 0,03% ?cido ?leo), baixo ?ndice de per?xido (1,13 ? 0,12 mEq/1000g), baixa umidade (0,25 ? 0,03%) e valores de densidade (0,9136 ? 0,00 g/cm3) e viscosidade (0,0546 ? 0,00 Pa.s) compar?veis aos de outros ?leos comest?veis. Esse ?leo tem ainda, predomin?ncia de ?cidos graxos insaturados (72,42%), principalmente os ?cidos linoleico (53,56%) e oleico (17,78%). A semente de faveleira e a torta apresentaram quantidade consider?vel de conte?do fen?lico total (324,92 ? 6,69 mg EAG/100 g e 398,89 ? 6,34 mg EAG/100 g, respectivamente), incluindo os flavonoides totais (18,70 ? 1,23 mg RE/g e 29,81 ? 0,71 mg RE/g, respectivamente), sendo a torta aquela que apresentou maiores quantidades desses compostos bioativos. As amostras n?o apresentaram atividade antibacteriana, entretanto apresentaram atividade antioxidante, principalmente a torta, com capacidade de sequestro dos radicais oxigenados de 28,39 ? 4,36 ?M TE/g. Sendo assim, o ?leo da semente de faveleira obtido por prensagem a frio tem potencial para ser utilizado na alimenta??o humana e o coproduto da prensagem tamb?m deve ser aproveitado por conter a maioria dos compostos antioxidantes da semente. / The faveleira (Cnidoscolus quercifolius) has oilseeds that can be used for obtaining vegetable oil. One way of obtaining oil is by cold pressing, in which to get the oil and the by-product, herein named press cake. The seed and its derivatives have potential for use in human food, therefore, this work focuses on the physicochemical evaluation of faveleira oil, as well as it investigates the bioactive properties of faveleira seeds, faveleira oil and the press cake obtained during the oilseed processing. The seeds were cold pressed and the following tests were performed: physicochemical characteristics (acidity, peroxide values, moisture, volatile matter, density and viscosity) and fatty acid profile of faveleira oil; total phenolic content and total flavonoid content of faveleira seed and press cake; antibacterial activity and antioxidant activity (DPPH radical scavenging activity, reducing power assay, total antioxidant capacity, superoxide radical scavenging assay and oxygen radical absorbance capacity) of seed, oil and press cake. Acidity (0.78 ? 0.03% oleic acid), peroxide values (1.13 ? 0.12 mEq/1000g) and moisture (0.25 ? 0.03%) are low; and density (0.9136 ? 0.00 g/cm3) and viscosity (0.0546 ? 0.00 Pa.s) are close to what was observed for others edible oil. Unsaturated fatty acids are predominant in faveleira oil (72.42%). The most abundant fatty acid found was linoleic acid (53.56%), followed by oleic acid (17.78%). The seed and press cake has high amount of total phenolic content (324.92 ? 6.69 mg EAG/100 g and 398.89 ? 6.34 mg EAG/100 g, respectively), including flavonoid content (18.70 ? 1.23 mg RE/g and 29.81 ? 0.71 mg RE/g, respectively). The press cake has higher amounts of bioactive compounds than seed. No bacterial growth inhibition was detected, but all samples including faveleira seeds, press cake, oil and its fractions have potent antioxidant activities, mainly the press cake, with oxygen radical absorbance capacity of 28.39 ? 4.36 ?M TE/g. Our results also show that faveleira oil has potential to be used as edible oil and the press cake should be used to contain the most antioxidants from seed.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-09T19:37:11Z No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-13T18:39:59Z (GMT) No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) / Made available in DSpace on 2017-03-13T18:39:59Z (GMT). No. of bitstreams: 1 MarcioBarbalhoDantasBezerra_TESE.pdf: 8185378 bytes, checksum: f592c32011f79a35178d9637d6c7a7cc (MD5) Previous issue date: 2016-12-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Nos ?ltimos anos, devido ao esgotamento progressivo dos combust?veis f?sseis convencionais, fontes de energia renov?veis tem desempenhado papel importante na matriz energ?tica. Dentre tais fontes, a biomassa lignocelul?sica aparece como uma op??o vi?vel, dispon?vel e de relativamente f?cil cultivo, sem competir com a produ??o de alimentos. A pir?lise r?pida destaca-se como rota de transforma??o de biomassa em produtos de diferentes fases (gases, bio-?leo, carv?o e condensado pirol?tico) com aplica??es diversas. Neste trabalho, bio-?leo foi produzido a partir do capim-elefante (Pennisetum Purpureum Schumach) em reatores de leito fluidizado com capacidades de 1,5 e 40 kg/h, sob diferentes atmosferas (ar, N2 e gases de reciclo da pir?lise), na temperatura de 500?C. No leito de 1,5 kg/h, conduziu-se a pir?lise sem e com a presen?a do catalisador HZSM-5, ambas sob N2. A pir?lise sem catalisador tamb?m foi realizada com reciclo (54, 74 e 85%) dos gases. No leito de 40 kg/h, conduziu-se a pir?lise sob atmosfera oxidativa moderada de ar (71% N2 e 21% O2) variando-se as configura??es da coluna de lavagem dos gases (sem trocador de calor, com trocador simples, com trocador multi-passe) e da recircula??o de condensado (produtos leves) produto da rea??o de pir?lise. Por fim, os bio-?leos obtidos dos experimentos com reciclo dos gases no leito de 1,5 kg/h foram submetidos ? desoxigena??o em leito de lama em 5%Pt/C. Os resultados mostraram que o reciclo dos gases ocasionou um aumento no teor de carbono de 53,96% (na pir?lise sem reciclo) para 70,89% (na pir?lise com 74% de reciclo) e para 77,16% (na pir?lise com a HZMS-5 in situ). O teor de oxig?nio diminuiu de 39,64% para 21,76%. O poder calor?fico superior (PCS) aumentou de 26,1 para 33,11 MJ/kg. Balan?os de massa mostraram que 5,4 a 6,15% da biomassa foi convertida em CH4, C2H4, C2H6 e C3H8 na pir?lise com reciclo dos gases. Todas as amostras de bio-?leos obtidas foram ricas em fen?is, com destaque para aquelas obtidas na atmosfera oxidativa. Os demais componentes e grupos funcionais majorit?rios no bio-?leo foram ?cido ac?tico, acetol, a??cares e cetonas. Baseado nos dados da din?mica da massa da biomassa no tempo um modelo cin?tico (biomassa produzindo bio-?leo + condensado, carv?o e gases) foi proposto e as equa??es diferenciais ordin?rias foram implementadas na linguagem FORTRAN com o objetivo de estimar constantes cin?ticas de velocidade da rea??o.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-14T23:53:02Z No. of bitstreams: 1 DeniseMariaDeLimaESilva_DISSERT.pdf: 1159056 bytes, checksum: 10cee662ae220c63b1bf31c52cb4684b (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-16T23:11:31Z (GMT) No. of bitstreams: 1 DeniseMariaDeLimaESilva_DISSERT.pdf: 1159056 bytes, checksum: 10cee662ae220c63b1bf31c52cb4684b (MD5) / Made available in DSpace on 2017-03-16T23:11:31Z (GMT). No. of bitstreams: 1 DeniseMariaDeLimaESilva_DISSERT.pdf: 1159056 bytes, checksum: 10cee662ae220c63b1bf31c52cb4684b (MD5) Previous issue date: 2016-12-12 / A astaxantina ? encontrada naturalmente em res?duos de camar?o e pode ser extra?da de diversas formas, dentre elas tem-se a extra??o com ?leo vegetal, o qual contribui para a estabilidade, retardando a oxida??o. O ?leo de soja por sua vez apresenta como vantagens a excelente otimiza??o de extra??o e o baixo custo. Objetivou-se com esse estudo, avaliar as caracter?sticas f?sicas e f?sico-qu?micas e a capacidade antioxidante de ?leos vegetais pigmentados, oriundos da extra??o da astaxantina a partir do res?duo de camar?o (Litopenaeus vannamei). Os ?leos pigmentados do res?duo de camar?o (OR) e da farinha do res?duo de camar?o (OF) obtidos foram avaliados quanto ao teor de astaxantina, caracter?sticas f?sicas e f?sico-qu?micas e capacidade antioxidante. As amostras de OR e OF apresentaram um teor de astaxantina respectivamente de 70,9 e 264,7 ?g/g, sendo a desidrata??o a respons?vel por esse aumento de 3,7 vezes. Do mesmo modo, seu poder antioxidante est? diretamente associado com o teor de astaxantina. No teste da Capacidade de Absor??o de Radicais de Oxig?nio (ORAC), OR e OF exibiram uma atividade antioxidante de 0,4957 e 0,4840 ?mol eq trolox/g, respectivamente. Entretanto, algumas carater?sticas f?sicas e f?sico-qu?micas de OF apresentaram altera??es. Diante do exposto, os ?leos pigmentados oriundo dos res?duos de camar?o apresentam um significativo potencial para uso em alimentos como um antioxidante natural devido ao poder antioxidante, e ao baixo custo de obten??o. / Astaxanthin is found naturally in shrimp residues and can be extracted in varying ways. The extraction with vegetable oil contributes to stability from this carotenoid, retarding its oxidation. The advantages of the soybean oil are excellent extraction optimization and low cost.The objective of this study was to evaluate the physical and physical-chemical characteristics and the antioxidant capacity of the pigmented oils obtained from the extraction of astaxanthin from the shrimp waste (litopenaeus vannamei). The obtained pigmented oils of the shrimp waste (OW) and of the shrimp waste flour (OF) were evaluated for astaxanthin content, physical and physico-chemical characteristics and antioxidant capacity. The samples of OW and OF showed an astaxanthin content of 70.9 and 264.7 ?g / g, respectively, where the decrease in moisture was responsible for this increase of 3.7 times. Likewise, its antioxidant power is directly associated with the astaxanthin contente. In the Oxygen Radical Absorption Capacity (ORAC) test, OW and OF exhibited an antioxidant activity of 0.4957 and 0.4840 ?mol eq trolox / g, respectively. However, some physical and physico-chemical characteristics of OF presented changes. Therefore, the pigmented oils from shrimp waste present a significant potential for the use in food as a natural antioxidant due to its antioxidant power, as well as the low price to obtain it.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T21:45:30Z No. of bitstreams: 1 IzadoraDeSouza_DISSERT.pdf: 2477888 bytes, checksum: 7568590836d5bc820ccba775908ac117 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-07T19:21:19Z (GMT) No. of bitstreams: 1 IzadoraDeSouza_DISSERT.pdf: 2477888 bytes, checksum: 7568590836d5bc820ccba775908ac117 (MD5) / Made available in DSpace on 2017-06-07T19:21:19Z (GMT). No. of bitstreams: 1 IzadoraDeSouza_DISSERT.pdf: 2477888 bytes, checksum: 7568590836d5bc820ccba775908ac117 (MD5) Previous issue date: 2015-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Cristais l?quidos (CL) possuem um arranjo molecular bastante estruturado que combina propriedades dos estados l?quido e s?lido, bem como o fluxo dos l?quidos e a ordena??o da estrutura cristalina dos s?lidos. Foram testadas t?cnicas de alta e baixa energia para produzir CL, utilizando oleato de s?dio, fosfatidilcolina de soja, ?leo de soja, N-metilpirrolidona (NMP) e ?gua. As intera??es entre NMP e oleato de s?dio da formula??o foram investigadas. CL obtidos por t?cnica de alta energia foram caracterizados por microscopia de luz polarizada (MLP), reologia e tamanho de part?cula. MLP exibiu estruturas que sugerem presen?a de CL lamelares. Na reologia, as amostras apresentaram viscosidade newtoniana limitante nas curvas de fluxo e uma diminui??o no grau de estrutura??o nos testes oscilat?rios, quando a concentra??o de NMP diminu?a. Uma nova t?cnica para obter sistemas lip?dicos de libera??o de f?rmacos foi desenvolvida a partir da dilui??o de CL produzidos por baixa energia. CL foram produzidos por agita??o magn?tica e, posteriormente, foram dilu?dos com ?gua e solu??o aquosa de NMP 10%, a 25 ? C e 70 ?C, em que foram avaliados tamanho de got?cula e incorpora??o de praziquantel (PRZ). Os sistemas dilu?dos com ?gua apresentaram menor faixa de tamanho (165,22 ? 381,26 nm) e maior faixa de incorpora??o de PRZ (40,96 ? 43,44 mg/mL) quando comparadas com as dilu?das com a solu??o de NMP. N?o houve contribui??o da solu??o de NMP para a forma??o de got?culas menores e para a maior incorpora??o de PRZ. Houve um aumento na solubilidade do PRZ em sistemas dilu?dos com ?gua, aumentando a fra??o sol?vel de f?rmaco em at? 200 vezes quando comparada ? sua solubilidade em ?gua. Testes utilizando Espalhamento de raios-X a baixo ?ngulo e MLP comprovaram a transi??o da mesofase lamelar para sistemas com micelas vermiformes, confirmando o sucesso da nova t?cnica em obter sistemas lip?dicos de libera??o de f?rmacos atrav?s da dilui??o de CL. / Liquid crystalline mesophase (LC) have an organized molecular arrangement and combining properties of liquid and solid state as the flow of liquids and the ordered and crystalline structure of solids. High- and low energy techniques were used to produce LC. N-methylpyrrolidone (NMP) and sodium oleate interactions with the system were investigated. LC fabricated by high-energy method were characterized by polarizing light microscopy (PLM), rheology and droplet size. PLM showed structures that indicated lamellar phases. Surface tension no important difference between the samples was observed. Rheology showed a zero shear viscosity in flow curves with a shear-thinning behavior in oscillatory tests, which with increasing of NMP, there was a decrease in degree of structure. Novel method to obtain lipid based drug delivery system (LBDDS) were developed through LC dilution and drug-loading was tested. LC fabricated with low-energy method was diluted with water and NMP 10% aqueous solution, at 25 ?C and 70 ?C, which droplet size and drug loading were evaluated. The systems diluted with water showed lower range size (165.22 nm- 381.26 nm) and higher drug-loading (40.96 mg/mL - 43.44 mg/mL) when compared with systems diluted by NMP solution. NMP aqueous solution did not contribute to form smaller particle size and higher praziquantel-loading. An increment in the apparent solubility of Praziquantel was achieved from incorporation in dilution of LC with water, increasing the soluble drug fraction approximately 200-fold when compared with water solubility. Small angle X-ray scattering (SAXS) measurements and PLM comproved the transition from lamellar mesophase to worm-like micelle systems confirming the success of new techinique for obtain LBDDS from LC dilution.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:25:25Z No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-13T21:41:06Z (GMT) No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) / Made available in DSpace on 2017-09-13T21:41:06Z (GMT). No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) Previous issue date: 2017-06-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Enxofre ? o terceiro elemento mais abundante no petr?leo e ? considerado um dos principais contaminantes presentes nessa matriz, podendo ocorrer nas formas de sulfetos, tiofenos, mol?culas polic?clicas contendo oxig?nio e nitrog?nio etc. Podem provocar corros?o, envenenamento de catalisadores automotivos e de processos do refino. Na queima dos combust?veis, quando presentes, d?o origem aos ?xidos SOX, que contribuem com a forma??o da chuva ?cida, acidez do solo e problemas respirat?rios na popula??o. Logo, a determina??o de enxofre ? de primordial interesse tanto para a ind?stria petroqu?mica quanto na ?rea da qu?mica anal?tica. Diante dessa conjuntura, ? proposto neste trabalho o desenvolvimento de um procedimento de preparo de amostras de petr?leo para determina??o por Cromatografia de ?ons (IC) do teor de enxofre como sulfato (SO4 2-). Para tal, a decomposi??o por via ?mida em sistema fechado assistida por radia??o micro-ondas, auxiliada pela a??o oxidativa de H2O2, foi o procedimento adotado, onde a temperatura e pot?ncia m?xima de 230 ?C e 1000 W, respectivamente, foram utilizadas no programa de aquecimento. Seis amostras de petr?leo (?API entre 18,75-25,17) foram analisadas, sendo as concentra??es m?dias de enxofre obtidas entre 377,50 e 3321,74 mg Kg-1, com DP entre ? 1,02 e ? 9,56. Para efeitos da avalia??o dos resultados obtidos, realizou-se a determina??o do teor de enxofre nas amostras em estudo utilizando a t?cnica UVF, fundamentada na norma oficial ASTM D5453-12, onde correla??es entre 85,43 e 106,43% foram alcan?adas, evidenciando a efici?ncia do m?todo proposto na convers?o das esp?cies de enxofre contidas nas amostras a sulfato e sua determina??o por IC. A efici?ncia do procedimento de decomposi??o adotado foi testada atrav?s do RCC% e do EOMD%, sendo alcan?ados teores entre 6,72 e 15,73% e 85,85 e 94,14%, respectivamente, demonstrando a efici?ncia do procedimento de decomposi??o utilizado. / Sulfur is the third most abundant element in petroleum and is considered one of the main contaminants present in this matrix, and may occur in the forms of sulfides, thiophenes, polycyclic molecules containing oxygen and nitrogen etc. They can cause corrosion, poisoning of catalysts used in refining and in automobiles. In fuel combustion, when present, they give rise to SOX oxides, which contribute to the formation of acid rain, soil acidity and respiratory problems in the population. Therefore, the determination of sulfur is of primary interest for the petrochemical industry as well as for analytical chemistry. Considering this situation, it is proposed the development of a procedure for the preparation of petroleum samples for the determination of the sulfur content of sulfur (SO4 2-) by Ion Chromatography (IC). For this, the wet decomposition assisted by microwave radiation, assisted by the oxidative action of H2O2, was the adopted procedure, where the maximum temperature and power of 230 ?C and 1000 W, respectively, were used in the program of heating. Six petroleum samples (?API between 18.75-5.17) were analyzed, with the mean concentrations of sulfur being between 377.50 and 3321.74 mg Kg-1, with a standard deviation between ? 1.02 and ? 9.56. For the purposes of the evaluation of the obtained results, the sulfur content in the samples under study was evaluated using the UVF technique, based on the official standard ASTM D 5453-12, where correlations between 85.43 and 106.43% were reached, evidencing the efficiency of the method proposed in the conversion of the sulfur species contained in the samples to sulfate and its determination by IC. The efficiency of the adopted decomposition procedure was tested using RCC% and EDMO%, with levels between 6.72 and 15.73% and 85.85 and 94.14% being respectively achieved, demonstrating the efficiency of the decomposition procedure used.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-01T22:40:26Z No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-14T00:23:14Z (GMT) No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) / Made available in DSpace on 2017-11-14T00:23:14Z (GMT). No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) Previous issue date: 2017-09-25 / A presente obra se disp?e a analisar a quest?o do labor ligado ? ind?stria do petr?leo quando este ocorre em plataformas e embarca??es de apoio mar?timo, no ?mbito da Zona Econ?mica Exclusiva brasileira. Pretende-se primordialmente, sob o prisma do princ?pio basilar do Direito do Trabalho que ? o Princ?pio da Prote??o, verificar com o aux?lio do m?todo hipot?tico-dedutivo a possibilidade de efetiva??o de direitos atrav?s da normatiza??o atualmente incidente sobre o setor, isto diante do contexto ambivalente da descoberta da possibilidade de extra??o na camada do "pr?-sal" aliada ? recente crise no pre?o do barril de petr?leo. De in?cio, ? trazida uma contextualiza??o quanto ? cria??o e desenvolvimento da ind?stria do petr?leo brasileira, sua expans?o para o mar, bem como as caracter?sticas do espa?o mar?timo onde a maior parte da explora??o no pa?s ocorre: a Zona Econ?mica Exclusiva. Em seguida, partindo da Constitui??o Federal de 1988, ? abordado o sistema de prote??o laboral no Brasil, sua import?ncia e princ?pios, seu di?logo de fontes e as particularidades do trabalho embarcado ? que implicam na necessidade de uma prote??o espec?fica. Posteriormente, se analisa aspectos quanto ? terceiriza??o intensa ao qual se submete o setor e ? quest?o da aplicabilidade ou n?o da legisla??o laboral sobre os contratos internacionais de trabalho, comuns na ?rea. Por fim, parte-se para uma an?lise das normas, em sentido amplo, aplic?veis tanto na atua??o do petroleiro propriamente dito como na do tripulante das embarca??es de apoio mar?timo. Este estudo se utilizou dos m?todos monogr?fico e hipot?tico-dedutivo, com revis?o de doutrina e jurisprud?ncia relativas ao tema e investiga??o das normas em sentido amplo incidentes. / This work intends to analyze the question of labour related to the oil industry when it occurs in platforms and maritime support vessels, within the scope of the Brazilian Exclusive Economic Zone. It is intended, primarily, under the prism of the fundamental principle of Labor Law, which is the Principle of Protection, to verify with the help of the hypothetical-deductive method the possibility of actualizing rights through the normatization currently pertaining to the sector, this against the ambivalent context of the discovery of the possibility of extraction in the "pre-salt" layer allied to the recent crisis in the price of the oil barrel. Initially, a contextualization about the creation and development of the Brazilian oil industry is brought, its expansion into the sea, as well as the characteristics of the maritime space where most of the exploration in the country occurs: the Exclusive Economic Zone. Next, starting from the 1988 Federal Constitution, the system of labour protection in Brazil is approached, its importance and principles, its dialogue of sources and the particularities of the offshore work, which incurs in the need of a specific protection. After, aspects on the intense outsourcing to which the sector is subjected and on the question of the applicability or not of the labor legislation on the international labour contracts, which are common in the area, are analyzed. Finally, we incur in an analysis of the norms, in a broad sense, applicable both to the performance of the oil workers themselves as well as to the crew of the maritime support vessels. This study used the monographic and hypothetical-deductive methods, with a review of doctrine and jurisprudence related to the topic and investigation of the applicable norms, in a broad sense.

abstract: Leo Kanner first described autism in his 1943 article in Nervous Child titled "Autistic Disturbances of Affective Contact". Throughout, he describes the eleven children with autism in exacting detail. In the closing paragraphs, the parents of autistic children are described as emotionally cold. Yet, he concludes that the condition as he described it was innate. Since its publication, his observations about parents have been a source of controversy surrounding the original definition of autism. Thus far, histories about autism have pointed to descriptions of parents of autistic children with the claim that Kanner abstained from assigning them causal significance. Understanding the theoretical context in which Kanner's practice was embedded is essential to sorting out how he could have held such seemingly contrary views simultaneously. This thesis illustrates that Kanner held an explicitly descriptive frame of reference toward his eleven child patients, their parents, and autism. Adolf Meyer, his mentor at Johns Hopkins, trained him to make detailed life-charts under a clinical framework called psychobiology. By understanding that Kanner was a psychobiologist by training, I revisit the original definition of autism as a category of mental disorder and restate its terms. This history illuminates the theoretical context of autism's discovery and has important implications for the first definition of autism amidst shifting theories of childhood mental disorders and the place of the natural sciences in defining them. / Dissertation/Thesis / Masters Thesis Biology 2014

Liev Tolstói, autor russo do século XIX, reconhecido tanto pelos acadêmicos como pelo público geral como um dos maiores romancistas da história, ao longo de mais de sessenta anos escreveu um diário paralelamente a sua vasta obra artística. No conjunto de toda a produção escrita do autor, o diário constitui a sua obra mais volumosa, contudo, quase inexplorada em língua portuguesa. O presente trabalho propõe-se aproximar o leitor brasileiro dessa faceta menos conhecida de Tolstói por meio da tradução, direta do russo, dos primeiros sete anos do diário (1847 1854). Observa-se o que há de particular nesse texto de Tolstói, no âmbito do diário como gênero literário e, por fim, questiona-se a possibilidade de ler o diário de Tolstói como criação artística independente ou se deve ele ser tratado como um coadjuvante na interpretação das obras literárias do autor. / Leo Tolstoy, great Russian writer of the nineteenth century, recognized as one of the leading novelists in the history of the genre, both by scholars and the general public, spent over sixty years writing a diary. Throughout the vast production written by the author, this diary is his most voluminous work, yet still unexplored and almost unknown in Portuguese. This work presents a translation directly from Russian of the first seven years of the diary (1847 - 1854) and also makes a first reflection on the nature of the text which encompasses the characteristics of Tolstoy\'s diary related to the genre. Then it analyzes whether Tolstoys diary can be treated as an artistic creation or as supporting text in the interpretation of literary works of the author.