Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-10-14T15:23:31Z No. of bitstreams: 1 FabianoAvelinoGoncalves_TESE.pdf: 5166245 bytes, checksum: 9524f366a3b9abeb13a597b0952e3c5b (MD5) / Approved for entry into archive by Maria Maia (aniolly@bczm.ufrn.br) on 2015-10-14T16:09:46Z (GMT) No. of bitstreams: 1 FabianoAvelinoGoncalves_TESE.pdf: 5166245 bytes, checksum: 9524f366a3b9abeb13a597b0952e3c5b (MD5) / Made available in DSpace on 2015-10-14T16:09:46Z (GMT). No. of bitstreams: 1 FabianoAvelinoGoncalves_TESE.pdf: 5166245 bytes, checksum: 9524f366a3b9abeb13a597b0952e3c5b (MD5) Previous issue date: 2014-04-23 / O presente trabalho investigou o potencial de diferentes materiais lignocelul?sicos residuais gerados em regi?es rurais e urbanas (fibra de coco maduro, casca de coco verde e casca de coco maduro), al?m de vegetal cultivado em ambientes in?spitos (cacto) visando ? produ??o de etanol, sendo todos, materiais abundantes na regi?o Nordeste do Brasil. Esses materiais foram submetidos aos pr?-tratamentos com per?xido hidrog?nio alcalino seguido por hidr?xido de s?dio (PHA-PHS), autohidr?lise (PA), hidrot?rmico catalisado com hidr?xido de s?dio (PHCHS) e organosolv usando etanol alcalino (POEA). Os materiais pr?-tratados foram submetidos ? hidr?lise enzim?tica e as estrat?gias de fermenta??o e sacarifica??o simult?nea (SSF) e fermenta??o e sacarifica??o semi-simult?nea (SSSF), utilizando-se Saccharomyces cerevisiae, Pichia stipitis e Zymomonas mobilis. Avaliou-se tamb?m, a presen?a de compostos inibit?rios (hidroximetilfurfural, furfural, ?cido ac?tico, ?cido f?rmico e ?cido levul?nico) e a ?gua marinha no meio de cultivo. Os materiais pr?-tratados por PHAPHS resultaram na deslignifica??o dos materiais em uma faixa entre 54,0 e 71,0%, contendo entre 51,80 e 54,91% de celulose, entre 17,65 e 28,36% de hemicelulose, entre 7,99 e 10,12% de lignina. As hidr?lises enzim?ticas proporcionaram convers?es dos materiais em glicose entre 68,0 e 76,0%. Os rendimentos em etanol utilizando SSF e SSSF para a fibra de coco maduro pr?-tratada variaram entre 0,40 e 0,43 g/g, 0,43 e 0,45 g/g, respectivamente. Os materiais pr?-tratados por PA apresentaram rendimentos de s?lidos entre 42,92 e 92,74%, contendo entre 30,65 e 51,61% de celulose e entre 21,34 a 41,28% de lignina. As hidr?lises enzim?ticas resultaram nas convers?es dos materiais em glicose entre 84,10 e 92,52%. Os rendimentos em etanol utilizando casca de coco verde pr?-tratada e as estrat?gias SSF e SSSF foram entre 0,43 e 0,45 g/g. A fibra de coco maduro pr?-tratada por PHCHS apresentou rendimentos de s?lidos entre 21,64 e 60,52%, com aumento de celulose entre 28,40 e 131,20%, redu??o de hemicelulose entre 43,22 e 69,04%, redu??o de lignina entre 8,27 e 89,13%. A hidr?lise enzim?tica resultou em convers?o do material em glicose de 90,72%. Os rendimentos em etanol utilizando SSF e SSSF foram 0,43 e 0,46 g/g, respectivamente. Os materiais pr?-tratados por POEA apresentaram redu??es de s?lido entre 10,75 e 43,18%, aumento de celulose em at? 121,67%, redu??o de hemicelulose em at? 77,09% e redu??o de lignina em at? 78,22%. As hidr?lises enzim?ticas resultaram nas convers?es dos materiais em glicose entre 77,54 e 84,27%. Os rendimentos em etanol utilizando cacto pr?-tratado e as estrat?gias SSF e SSSF foram entre 0,41 e 0,44 g/g, 0,43 e 0,46 g/g, respectivamente. As fermenta??es alco?licas realizadas em biorreator resultaram em rendimentos e produ??o de etanol entre 0,42 e 0,46 g/g, 7,62 e 12,42 g/L, respectivamente. Os compostos inibit?rios apresentaram efeitos sin?rgicos negativos nas fermenta??es realizadas por P. stipitis, Z. mobilis e S. cerevisiae. O ?cido f?rmico e o ?cido ac?tico apresentaram efeitos mais significativos entre os compostos inibit?rios, seguido pelo hidroximetilfurfural, furfural e ?cido levul?nico. As fermenta??es realizadas em meio de cultivo dilu?do com ?gua marinha apresentaram resultados promissores, especialmente quando se utilizou S. cerevisiae (0,50 g/g) e Z. mobilis (0,49 g/g). Os diversos resultados obtidos no presente trabalho indicam que, os materiais lignocelul?sicos, pr?-tratamentos, estrat?gias fermentativas e micro-organismos estudados merecem aten??o por parecerem promissores e pass?veis de serem utilizados no contexto de biorrefinaria visando ? produ??o de etanol. / The present work investigated the potential of different residual lignocellulosic materials generated in rural and urban areas (coconut fibre mature, green coconut shell and mature coconut shell), and vegetable cultivated in inhospitable environments (cactus) aimed at the production of ethanol, being all materials abundant in the Northeast region of Brazil. These materials were submitted to pretreatments with alkaline hydrogen peroxide followed by sodium hydroxide (AHP-SHP), autohydrolysis (AP), hydrothermal catalyzed with sodium hydroxide (HCSHP) and alkali ethanol organosolv (AEOP). These materials pretreated were submitted to enzymatic hydrolysis and strategies of simultaneous saccharification and fermentation (SSF) and saccharification and fermentation semi-simultaneous (SSSF) by Saccharomyces cerevisiae, Zymomonas mobilis and Pichia stipitis. It was also evaluated the presence of inhibitory compounds (hydroxymethylfurfural, furfural, acetic acid, formic acid and levulinic acid) and seawater during the fermentative process. Materials pretreated with AHP-SHP have resulted in delignification of the materials in a range between 54 and 71%, containing between 51.80 and 54.91% of cellulose, between 17.65 and 28.36% of hemicellulose, between 7.99 and 10.12% of lignin. Enzymatic hydrolysis resulted in the conversions in glucose between 68 and 76%. Conversion yields in ethanol using SSF and SSSF for coconut fibre mature pretreated ranged from 0.40 and 0.43 g/g, 0.43 and 0.45 g/g, respectively. Materials pretreated by AP showed yields of solids between 42.92 and 92.74%, containing between 30.65 and 51.61% of cellulose, 21.34 and 41.28% of lignin. Enzymatic hydrolysis resulted in glucose conversions between 84.10 and 92.52%. Proceeds from conversion into ethanol using green coconut shell pretreated, in strategy SSF and SSSF, were between 0.43 and 0.45 g/g. Coconut fibre mature pretreated by HCSHP presented solids yields between 21.64 and 60.52%, with increased in cellulose between 28.40 and 131.20%, reduction of hemicellulose between 43.22 and 69.04% and reduction in lignin between 8.27 and 89.13%. Enzymatic hydrolysis resulted in the conversion in glucose of 90.72%. Ethanol yields using the SSF and SSSF were 0.43 and 0.46 g/g, respectively. Materials pretreated by AEOP showed solid reductions between 10.75 and 43.18%, cellulose increase up to 121.67%, hemicellulose reduction up to 77.09% and lignin reduced up to 78.22%. Enzymatic hydrolysis resulted in the conversion of glucose between 77.54 and 84.27%. Yields conversion into ethanol using the SSF and SSSF with cactus pretreated ranged from 0.41 and 0.44 g/g, 0.43 and 0.46 g/g, respectively. Fermentations carried out in bioreactors resulted in yields and ethanol production form 0.42 and 0.46 g/g and 7.62 and 12.42 g/L, respectively. The inhibitory compounds showed negative synergistic effects in fermentations performed by P. stipitis, Z. mobilis and S. cerevisiae. Formic acid and acetic acid showed most significant effects among the inhibitory compounds, followed by hydroxymethylfurfural, furfural and levulinic acid. Fermentations carried out in culture medium diluted with seawater showed promising results, especially for S. cerevisiae (0.50 g/g) and Z. mobilis (0.49 g/g). The different results obtained in this study indicate that lignocellulosic materials, pretreatments, fermentative processes strategies and the microorganisms studied deserve attention because they are promising and capable of being used in the context of biorefinery, aiming the ethanol production.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-10T20:59:54Z No. of bitstreams: 1 IsabelDoNascimentoSilva_DISSERT.pdf: 2418735 bytes, checksum: ca16004dc66af3d5c11335f42a833675 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-05-12T20:15:13Z (GMT) No. of bitstreams: 1 IsabelDoNascimentoSilva_DISSERT.pdf: 2418735 bytes, checksum: ca16004dc66af3d5c11335f42a833675 (MD5) / Made available in DSpace on 2016-05-12T20:15:13Z (GMT). No. of bitstreams: 1 IsabelDoNascimentoSilva_DISSERT.pdf: 2418735 bytes, checksum: ca16004dc66af3d5c11335f42a833675 (MD5) Previous issue date: 2015-07-15 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Com o crescente desenvolvimento cient?fico e tecnol?gico, o homem passa a explorar os recursos naturais de forma mais agressiva, gerando diariamente grandes quantidades de res?duos que s?o descartados no meio ambiente sem nenhum tratamento pr?vio. As institui??es de ensino e pesquisa v?m ganhando destaque como poluidoras do ambiente, j? que ignoram sua condi??o de geradoras de efluentes e descartam seus res?duos qu?micos de forma inadequada. Dentre os principais contaminantes ambientais, os corantes ganham destaque, pois se tratam de subst?ncias altamente t?xicas para a fauna e flora aqu?tica, podendo causar s?rios danos ? sa?de humana. Muitas t?cnicas no tratamento de efluentes contendo corantes v?m sendo apresentados na literatura, dentre as quais se destaca a adsor??o que vem sendo utilizada de forma eficaz no tratamento desses efluentes. O baba?u, palmeira nativa da Am?rica latina ? amplamente encontrada em alguns estados do norte, nordeste e centro-oeste do Brasil, produz um fruto que possui uma vasta potencialidade, dentre as quais se destaca a produ??o de carv?o. Assim, este trabalho tem como objetivo utilizar o carv?o de coco de baba?u modificado com ?cido c?trico (CCBMod) para tratar o efluente real gerado a partir do uso do corante azul de metileno (AM). Para caracterizar o CCBMod utilizou-se as t?cnicas de Espectroscopia de absor??o molecular na regi?o do Infravermelho (IV), Difra??o de raios-X (DRX), Termogravimetria e An?lise T?rmica Diferencial (TG/DTA) e Microscopia Eletr?nica de Varredura (MEV). O IV mostrou a presen?a de grupos OH, CH2, CH3 e C=O tanto no material modificado quando no material sem modifica??o, grupos estes caracter?sticos da lignina, no entanto n?o se verificou nenhuma incorpora??o do ?cido c?trico no material, dados que foram comprovados pelas demais t?cnicas. Assim infere-se que o ?cido usado na modifica??o foi eficiente na ativa??o dos s?tios dispon?veis do carv?o, melhorando o processo de adsor??o no decorrer do tempo. Na varia??o da concentra??o inicial do adsorvente, observou-se que o percentual de remo??o da cor do AM aumenta com a diminui??o da concentra??o inicial, onde nas concentra??es de 14, 12, 10, 8, 6, 4 e 2 mg L-1 apresentou valores m?dios de remo??o correspondendo respectivamente a 56,13; 62,43; 62,70; 70,00; 87,00; 93,83 e 100 %. Para a varia??o do pH da solu??o, observou-se que com o aumento do pH aumenta-se o percentual de remo??o da cor, assim para os potenciais hidrogeni?nicos 3,0; 6,0 e 10,0 obteve-se respectivamente, 39,73; 62,69 e 92,74 % de remo??o do AM. O modelo de cin?tica de adsor??o que melhor se ajustou aos dados experimentais foi o de pseudo-segunda-ordem, apresentando um valor de r2 igual 0,9965 e valores de qe,exp de 1,5424 mg g-1 e qe,teor de 1,5625 mg g-1. O modelo isot?rmico que melhor se ajustou aos dados experimentais foi o de Langmuir indicando uma natureza de adsor??o em monocamada. O efluente real proposto apresentou uma decomposi??o do AM de 7,20 % no decorrer de 14 dias e a remo??o desse efluente real pelo CCBMod foi de 57,86%. Concluindo-se que o CCBMod ? um material adsorvente eficaz na remo??o do AM de solu??es aquosas. / With the growing scientific and technological development, the man begins to exploit natural resources more aggressively, generating daily huge amounts of waste that are discarded into the environment without any prior treatment. Higher educational and research institutions have been gaining emphasis as environmental polluters, since ignore their condition waste generators and discard their chemical waste improperly. Among the main environmental contaminants, the dyes gain prominence, because they are highly toxic substance to aquatic plants and animals, causing serious damage to human health. Many techniques for the treatment of wastewater containing dyes have been reported in the literature, among them the adsorption has been used of way effective in the treatment of these effluents containing dyes. The babassu, palm tree native of Latin America is widely found in some northern, northeast and center-west states of Brazil, produces a fruit that has a vast potential, among which stands out the production of coal. This work aims to use the babassu coconut carbon (BCC) modified with citric acid to treat real effluent generated from methylene blue (MB) dye. In order to characterize the BCC modified were used the techniques of molecular absorption spectroscopy in infrared region (IR), X-ray Diffraction (XRD), thermal analysis (TG/ DTA) and Scanning Electron Microscopy (SEM). The IR showed the presence of groups OH, CH2, CH3 and C=O in both the materials modified and without modification, these groups are characteristic of lignin. It is also noted that the acid treatment promoted a modified on carbon surface, decreasing the heterogeneity of the same. Data were confirmed by other techniques. Thus it is inferred that the acid used in the modification was effective in activation of the available carbon sites, improving adsorption process over time. Varying the initial concentration of the adsorbent, it was observed that the removal percentage of MB color increases with decreasing initial concentration, where the concentrations from 14 to2 mg L-1 showed maximum removal points corresponding respectively to 62,43; 62,70; 70,00; 87,00; 93,83 e 100 %. For the change in pH of the solution was observed that with an increase in pH increases the percentage of the MB removal color, so to pH 3.0; 6.0 and 10.0 was obtained respectively 93,60; 67.29 and 42.15% removal AM. The adsorption kinetics model that best fit the experimental data was the pseudo-second-order, with a r2 value of 0.9965 and qe,exp 1.5424 mg g-1 and qe,teor 1.5625 mg g-1. The isothermal model that best fit the experimental data was the Langmuir indicating adsorption in monolayer. Concluding the modified BCC was presented as an effective adsorbent material in the MB removal from aqueous solutions. The real effluent proposed presented a decomposition to AM of 7.20% over 14 days and the removal of this real effluent by CCBMod was 57.86%. Concluding CCBMod is an effective adsorbent material in the removal of AM from aqueous solutions.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-03T23:57:10Z No. of bitstreams: 1 FelipeMoraisFernandesSerafim_DISSERT.pdf: 2615030 bytes, checksum: c5cdd1f3e33cd45acd31d95163c78d6a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-07T20:57:49Z (GMT) No. of bitstreams: 1 FelipeMoraisFernandesSerafim_DISSERT.pdf: 2615030 bytes, checksum: c5cdd1f3e33cd45acd31d95163c78d6a (MD5) / Made available in DSpace on 2016-06-07T20:57:49Z (GMT). No. of bitstreams: 1 FelipeMoraisFernandesSerafim_DISSERT.pdf: 2615030 bytes, checksum: c5cdd1f3e33cd45acd31d95163c78d6a (MD5) Previous issue date: 2015-11-16 / O trabalho objetiva investigar o uso de uma estrutura de sanduiche h?brida formada com tecido de fibras de kevlar (Kevlar 49), manta de fibras de vidro do tipo E e particulado do endocarpo do coco seco (Cocos Nuc?fera Linn), tendo como matriz a base de resina termofixa de tereftalato de poli?ster para o uso em ?reas de equipamento de prote??o. O processo de fabrica??o adotado foi o de lamina??o manual (hand lay up) para confeccionar a estrutura h?brida. Para caracterizar o comportamento mec?nico e f?sico foi fabricada uma placa de 800x700 mm? do painel h?brido, da qual foram preparados corpos de prova para os ensaios de absor??o de umidade, tra??o uniaxial, densidade volumetrica, impacto (Charpy) e testes bal?sticos. Este ?ltimo foi aplicado para que fosse feito um estudo comparativo da fratura bal?stica causada pela penetra??o do projetil bal?stico de calibre 38 e 380, N?vel I e N?vel III, respectivamente. Houve tamb?m analise do di?metro de entrada e sa?da do projetil, como da ?rea de dano delaminada. Para o ensaio de Impacto (Charpy), foram analisadas a energia absorvida e a caracter?stica da fratura, para, assim, ser analisado o comportamento da configura??o proposta. Todos os testes realizados tem por finalidade a aplica??o nas ?reas de equipamento contra impacto bal?stico, tais como, capacetes; coletes ? prova de bala; blindagens; embalagens de prote??o entre outros itens a serem identificados nesta pesquisa. Os resultados obtidos apontam para aplica??es onde envolvem solicita??es trativas para este material, por?m, o mesmo obteve valores baixos de energia absorvida no ensaio de impacto. No teste bal?stico, houve penetra??o total das placas, mas com significativa ?rea delaminada. / This work aims to study and investigate the use of a hybrid composite polymer formed with blanket aramid (Kevlar 29) fiber blanket flax fiber and particulate dry endocarp of coconut (Cocos nucifera Linn), using as matrix an epoxy resin based thermoset for use in areas of protective equipment. Besides such material is used an aluminum plate, joined to the composite by means of glue based on epoxy and araldite commercial. The manufacturing process adopted was manual lamination (Hand Lay Up) to manufacture the hybrid composite. After the composite is prepared, an aluminum plate is subjected to pressure and glued to cure the adhesive. Layers of veil will also be used to separate the particulate from the linen blanket layer without disturbing the alignment of the fibers of the blankets. To characterize the mechanical and physical behavior was manufactured a plate of 800 x 600 mm of the hybrid composite, which were removed specimens for tests of water absorption to saturation; density; impact test (Charpy) and two test specimens for ballistic testing 220 mm x 200 mm to make a comparative study between the dry state and saturated water absorption and thus see the ballistic performance of these two conditions. The test was applied to make a comparative study of fracture in these two conditions, caused by penetrating ballistic missile (38 and 380). To test the impact (Charpy) will analyze the absorbed energy, fracture appearance and lateral contraction, also in dry condition and saturation of absorbed water, thereby analyzing situations where the impact load is relevant, such as bumps and shocks produced by stone, metal or wooden bars among others. The proposed configuration, along with the tests, has the purpose, application in the fields of equipment against ballistic impact, such as helmets; bullet proof vests; shields; protective packaging and other items to be identified in this research.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-23T20:06:05Z No. of bitstreams: 1 MaraisaCristianeDeOliveiraLeite_DISSERT.pdf: 2733334 bytes, checksum: d086f67ef0d47e95e151ff9ad376bcd7 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-27T20:29:13Z (GMT) No. of bitstreams: 1 MaraisaCristianeDeOliveiraLeite_DISSERT.pdf: 2733334 bytes, checksum: d086f67ef0d47e95e151ff9ad376bcd7 (MD5) / Made available in DSpace on 2016-06-27T20:29:13Z (GMT). No. of bitstreams: 1 MaraisaCristianeDeOliveiraLeite_DISSERT.pdf: 2733334 bytes, checksum: d086f67ef0d47e95e151ff9ad376bcd7 (MD5) Previous issue date: 2015-12-22 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Este trabalho objetiva fabricar e caracterizar um comp?sito hibrido pl?stico, com matriz ? base de resina de poli?ster isoft?lica e tendo como refor?o fibras de vidro e o endocarpo do coco seco (Cocos Nuc?fera Linn) na forma de particulado como carga. O comp?sito foi confeccionado industrialmente na Tecniplas Ind?stria e Com?rcio LTDA. na forma de placa, e o processo de fabrica??o utilizado foi ? lamina??o manual (Hand Lay up). A partir da placa foram preparados corpos de prova para ensaios de densidade volum?trica, absor??o de umidade, tra??o uniaxial nos estados seco e ?mido, e ensaio de flex?o, al?m de estudos sobre o comportamento da fratura gerada nos ensaios mec?nicos por meio do MEV. Todos os ensaios foram feitos de modo a achar as aplica??es mais vi?veis ao comp?sito hibrido fabricado. Nos ensaios de tra??o e flex?o foram analisadas as propriedades de tens?o ?ltima, m?dulo de elasticidade e deforma??o. A partir dos resultados observa-se que o percentual de umidade absorvido foi de 3,03%, um valor razoavelmente alto, dado o intervalo de tempo que ocorreu esta absor??o. A presen?a de umidade no ensaio de tra??o significou uma queda de 19,77% da resist?ncia ?ltima, e 5,26% no m?dulo de elasticidade. Para os ensaios de flex?o obteve-se o valor m?dio de 69,13 MPa de resist?ncia ? flex?o. Os resultados apontam a aplica??o do comp?sito hibrido estudado em estruturas leves, ambientes internos, onde exijam solicita??es de tra??o de baixo/m?dio desempenho, e onde envolvem solicita??es de flex?o. / This work aims to manufacture and characterize a hybrid plastic composite with the matrix isophthalic polyester resin base and having as reinforcing glass fiber and the dry endocarp of coconut (Coco nucifera Linn) in the form of particles as filler. The composite was made industrially in Tecniplas Industry and Trade LTDA. in the form of plate, and was manufactured process made by the manual lamination (Hand Lay Up). From the plate they were prepared test specimens for testing density, water absorption, uniaxial traction in dry and wet states, and testing of bending, as well as studies on the behavior of the generated fractures, macroscopic and microscopic, in mechanical tests through. All tests were performed in order to find the most viable applications the hybrid composite manufactured. The tensile and bending tests were analyzed last tensile properties, elasticity and deformation module. After the studies, it is observed that the percentage moisture absorbed was 3.03%. The presence of moisture in the tensile test meant a decrease of 19.77% from last stand, and 5.26% in the elastic modulus. For bending tests gave an average value of 69.13 MPa flexural strength. The results show the application of hybrid composite studied in lightweight structures, indoors, which require low / medium performance traction demands, and which involve flexural requests.

Made available in DSpace on 2014-12-17T14:52:47Z (GMT). No. of bitstreams: 1 DioneVS.pdf: 4321240 bytes, checksum: cfc7d44567292641296b22c79aee5dc3 (MD5) Previous issue date: 2009-12-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The present study presents an investigation concerning the factors that, in the perception of the extension of Emater/RN they affect the competitiveness of the productive chain of the coconut in Rio Grande do Norte. For so much it is used of a theory structured starting from the several aspects that delineate the competitiveness and your respective factors, besides the aspects that compose the productive chain of the coconut in Rio Grande do Norte. The research was accomplished at the mesorregi?o Leste Potiguar of Rio Grande do Norte, territory of larger index of coconut production in the state. The used methodological approach was the one of descriptive exploratory research together to the conduction of a rising type Survey. The field research obtained 35 valid questionnaires, whose interviewees were the extension of Emater/RN in performance in the municipal districts that compose the mesorregi?o Leste Potiguar of Rio Grande do Norte. The results allow to end that in the perception of the extension, the level of competitiveness of the productive chain of the coconut in Rio Grande do Norte is still low, presenting as larger fetter the low price of the coconut and the high costs of the productive process, being recommended a larger support to the producing of coconut in relation to technical attendance, incentive actions to the quality, understanding with relationship to the benefits of the creation of partnerships, associations and cooperatives, as well as the promotion of the knowledge of the productive chain of the coconut in Rio Grande do Norte for subsequent ends of all the agents' of that chain training with relationship to the importance of the development of competitive advantages / O presente estudo apresenta uma investiga??o acerca dos fatores que, na percep??o dos extensionistas da Emater/RN, afetam a competitividade da cadeia produtiva do coco no Rio Grande do Norte. Para tanto utiliza-se de um arcabou?o te?rico estruturado a partir dos diversos aspectos que delineiam a competitividade e seus respectivos fatores, al?m dos aspectos que comp?em a cadeia produtiva do coco no Rio Grande do Norte. Esta pesquisa foi realizada na mesorregi?o Leste Potiguar do Rio Grande do Norte, territ?rio de maior ?ndice de produ??o de coco no estado. A abordagem metodol?gica utilizada foi a de pesquisa explorat?ria descritiva juntamente ? condu??o de um levantamento tipo Survey. A pesquisa de campo obteve 35 question?rios v?lidos, aplicados junto aos extensionistas da Emater/RN em atua??o nos munic?pios que comp?em a mesorregi?o Leste Potiguar do Rio Grande do Norte. Os resultados permitem concluir que na percep??o dos extensionistas, o n?vel de competitividade da cadeia produtiva do coco no Rio Grande do Norte ainda ? baixo, apresentando como maiores entraves o baixo pre?o do coco e os elevados custos do processo produtivo, recomendando-se um maior apoio aos produtores de coco em rela??o a assist?ncia t?cnica, a??es de est?mulo ? qualidade, conscientiza??o quanto aos benef?cios da cria??o de parcerias, associa??es e cooperativas, assim como a promo??o do conhecimento da cadeia produtiva do coco no Rio Grande do Norte para fins posteriores de capacita??o de todos os agentes dessa cadeia quanto ? import?ncia do desenvolvimento de vantagens competitivas

Made available in DSpace on 2014-12-17T14:58:13Z (GMT). No. of bitstreams: 1 ClaudioMN_DISSERT.pdf: 1805949 bytes, checksum: bd812f7d518216891e7605f025b06031 (MD5) Previous issue date: 2011-07-29 / To take care of to the demand of the new constructions in the low income communities and to develop the production of a strengthened alternative brick with staple fibers of coconut, capable to contribute mainly with the recycling of the green and mature coconut in the urban and agricultural lexes, this research was developed, to confection bricks of soil-cement with coconut fiber. Ecologically correct material and of low cost, since the greenhouse use of or oven for burning will be manufactured without. The study it presents a set of tables and graphs that prove good indices found in the values of the density, water absorption, axial compressive strength and isolation term acoustics, with evidential results that make possible the production in industrial character with press mechanics or the place of the workmanship with manual form. The preparation of coconut staple fibers was made of natural form without use of chemical products not to deprive of characteristics the properties mechanical physicist-chemistries and of the same ones. The sixty bricks produced in simple and manual press had been carried through in four lots of fifteen units. The mixture of aggregates was made in four different traces composites for: ground erinaceous, cement, fiber of dry coconut and water; the bricks had been compact in the press and cured in natural way under an area covered during the minimum time of seven days / Para atender a demanda das novas constru??es nas comunidades de baixa renda e incrementar a produ??o de um tijolo alternativo refor?ado com fibras de coco, capaz de contribuir principalmente com a reciclagem do coco verde e maduro nos lix?es urbanos e rurais, foi desenvolvida essa pesquisa, para confeccionar tijolos de solocimento com fibra de coco. Material ecologicamente correto e de baixo custo, j? que ser? fabricado sem o uso de estufa ou forno para queima. O estudo apresenta um conjunto de tabelas e gr?ficos que comprovam bons ?ndices encontrados nos valores da densidade, absor??o de ?gua, resist?ncia ? compress?o axial e isolamento termo ac?stica, com resultados comprobat?rios que possibilitam a produ??o em car?ter industrial com prensa mec?nica ou no local da obra com f?rma manual. A prepara??o das fibras de coco foi feita de forma natural sem uso de produtos qu?micos para n?o descaracterizar as propriedades f?sicoqu?micas e mec?nicas das mesmas. Os sessenta tijolos produzidos em prensa simples e manual foram realizados em quatro lotes de quinze unidades. A mistura dos agregados foi feita em quatro tra?os diferentes compostos por: solo arenoso, cimento, fibra de coco seco e ?gua; os tijolos foram compactados na prensa e curados em meio natural sob uma ?rea coberta durante o tempo m?nimo de sete dias

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-04-11T19:34:25Z No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-04-12T22:40:15Z (GMT) No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) / Made available in DSpace on 2018-04-12T22:40:16Z (GMT). No. of bitstreams: 1 JulianaElionaraBezerraCosta_TESE.pdf: 2543108 bytes, checksum: 556e8d7316f4202efa7113ded946013c (MD5) Previous issue date: 2017-12-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Alguns res?duos, provenientes das mais variadas atividades, podem ser reaproveitados, diminuindo o efeito dos impactos ambientais ocasionados pela m? disposi??o dos mesmos no meio ambiente. Os res?duos classificados com biomassa lignocelul?sica, podem ser convertidos em produtos qu?micos e combust?veis a partir da pir?lise r?pida convencional, gerando como produto principal o bio-?leo com caracter?sticas diretamente ligadas as caracter?sticas da biomassa de origem que podem ser melhoradas a partir do uso de catalisadores. Neste trabalho foram sintetizados catalisadores do tipo ZSM-5 e HZSM-5, utilizando res?duos de p? de granito, p? de vidro, diatomita e cinza da casca do arroz como fontes alternativas e tamb?m um catalisador utilizando fonte convencional de S?lica e Alum?nio. O objetivo da s?ntese desses materiais ? utiliz?-los como catalisador na pir?lise da fibra do coco visando a obten??o de produtos com maior valor agregado, reduzindo a produ??o de compostos oxigenados. A biomassa utilizada foi caracterizada por an?lise imediata, densidade, an?lise elementar, Teor de Celulose, hemicelulose e lignina, Poder calor?fico, TG/DTG, DRX, FT-IR e FRX afim de analisar o potencial energ?tico da mesma. Os precursores de S?lica e Alum?nio foram submetidos a an?lises de FRX, DRX, e os catalisadores foram caracterizados por TG/DTG, DRX, FT-IR, MEV e BET. Nos resultados de pir?lise convencional da fibra do coco observou a grande produ??o de produtos oxigenados, a maior parte deles fen?is e nos resultados das pir?lise catal?tica foi poss?vel observar a diminui??o desses produtos, provando a efici?ncia dos catalisadores utilizados. / Some waste, from the most varied activities, can be reused, reducing the effect of these impacts, usually caused by poor disposal in the environment. The residues classified with lignocellulosic biomass can be converted into chemical products and fuels from the conventional fast pyrolysis, generating as main product the bio-oil. This generally presents some undesirable characteristics directly linked to the characteristics of the source biomass, which decrease its energy efficiency. The use of catalysts allows the reduction of these undesirable products and improves the final quality of the bio oil. As a result, ZSM-5 and HZSM-5 catalysts were synthesized using granite powder, glass powder, diatomite and rice husk ash as alternative sources of silica and aluminum; was also synthesized using a conventional silica and aluminum source, serving as a standard for the others. . The objective of the synthesis of these materials is to use them as a catalyst in the pyrolysis of coconut fiber in order to obtain products with higher added value, reducing the production of oxygenated compounds. The biomass used was characterized by immediate analysis, density, elemental analysis, cellulose content, hemicellulose and lignin, calorific power, TG / DTG, XRD, FT-IR and FRX in order to analyze the energy potential of the same. Silica and Aluminum precursors were subjected to FRX, XRD analyzes, and the catalysts were characterized by TG / DTG, DRX, FT-IR, MEV and BET. In the results of conventional pyrolysis of the coconut fiber, it was observed the great production of oxygenated products, most of them phenols and in the results of the catalytic pyrolysis it was possible to observe the decrease of these products, proving the efficiency of the catalysts used.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-24T18:34:01Z No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) / Approved for entry into archive by Monica Paiva (monicalpaiva@hotmail.com) on 2017-04-24T18:37:49Z (GMT) No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) / Made available in DSpace on 2017-04-24T18:37:49Z (GMT). No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) Previous issue date: 2014-06-09 / Atualmente a preocupa??o com o meio ambiente tem impulsionado o desenvolvimento de novas tecnologias capazes de minimizar o impacto causado pelo homem. A utiliza??o do mesocarpo do coco-da-ba?a para produ??o de carv?o ativado reduz o impacto ambiental por ele causada. O presente trabalho pretende produzir e ativar o carv?o gerado a partir mesocarpo do coco-da-ba?a com ?cido fosf?rico (H3PO4), hidr?xido de pot?ssio (KOH) e acetado de s?dio (CH3COONa) em concentra??es variadas avaliando-os em duas faixas de granulometria: retido em 48 Mesh e passante de 325 Mesh, assim como caracteriz?-los atrav?s do ?ndice de azul de metileno e de microscopia eletr?nica de varredura (MEV). Foi realizada a adequa??o das curvas de adsor??o ao modelo de Langmuir. / Atualmente a preocupa??o com o meio ambiente tem impulsionado o desenvolvimento de novas tecnologias capazes de minimizar o impacto causado pelo homem. A utiliza??o do mesocarpo do coco-da-ba?a para produ??o de carv?o ativado reduz o impacto ambiental por ele causada. O presente trabalho pretende produzir e ativar o carv?o gerado a partir mesocarpo do coco-da-ba?a com ?cido fosf?rico (H3PO4), hidr?xido de pot?ssio (KOH) e acetado de s?dio (CH3COONa) em concentra??es variadas avaliando-os em duas faixas de granulometria: retido em 48 Mesh e passante de 325 Mesh, assim como caracteriz?-los atrav?s do ?ndice de azul de metileno e de microscopia eletr?nica de varredura (MEV). Foi realizada a adequa??o das curvas de adsor??o ao modelo de Langmuir.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-13T19:59:23Z No. of bitstreams: 1 HenriqueJorgeMaiaCosta_TESE.pdf: 2983042 bytes, checksum: e69d54482caf7ae9786e28e71023539e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-19T12:14:15Z (GMT) No. of bitstreams: 1 HenriqueJorgeMaiaCosta_TESE.pdf: 2983042 bytes, checksum: e69d54482caf7ae9786e28e71023539e (MD5) / Made available in DSpace on 2017-06-19T12:14:15Z (GMT). No. of bitstreams: 1 HenriqueJorgeMaiaCosta_TESE.pdf: 2983042 bytes, checksum: e69d54482caf7ae9786e28e71023539e (MD5) Previous issue date: 2016-08-29 / O jejum pr?-operat?rio foi institu?do h? muitos anos, no in?cio das pr?ticas anest?sicas, para garantir o esvaziamento do conte?do g?strico, evitar bronco-aspira??o, v?mitos, regurgita??o, administra??o de v?rias drogas para reduzir a acidez g?strica e volume. Protocolos de jejum pr?-operat?rio sugerem per?odos menores de jejum, principalmente para l?quidos, permitindo mais conforto aos pacientes, e menor risco de hipoglicemia e desidrata??o, sem aumentar a incid?ncia de aspira??o pulmonar perioperat?ria. O objetivo do estudo foi avaliar se o bioproduto ? base de ?gua de coco e maltodextrina (ACP Surgery) supria as necessidades dos protocolos cl?nicos de jejum pr?-operat?rio de curta dura??o do projeto ACERTO (Acelera??o da Recupera??o Total P?s-operat?ria) com boa toler?ncia e aceita??o. Foi realizado um estudo prospectivo, aleat?rio, controlado e duplo cego em seres humanos, em um grupo de 49 pacientes na Santa Casa de Miseric?rdia de Fortaleza, para comprovar a efici?ncia e efic?cia do ACP Surgery para atingir as metas e efeitos planejados nos protocolos de jejum pr?-operat?rio de curta dura??o. Os grupos experimentais foram: G1 [grupo controle; Nutri Dextrin (Nutrimed, Fortaleza, Cear?); n = 20) e G2 [interven??o; ACP Surgery (ACP Biotecnologia, Fortaleza, Cear?; n = 29]. No intervalo entre 10 e 20 horas da realiza??o da cirurgia, amostra de sangue era colhida de cada paciente e encaminhada para o Laborat?rio de An?lises Cl?nicas do hospital para mensura??o dos n?veis s?ricos de leuc?citos totais, glicose, s?dio, pot?ssio e cloro. Os dados foram submetidos ao teste t (? = 95%, p > 0,05 e ?rea de rejei??o t > 1,96) e expressos em m?dia e desvio padr?o. Os grupos G1 (Nutri Dextrin) e G2 (ACP Surgery) apresentaram os seguintes resultados quanto ?s an?lises sangu?neas: leuc?citos totais G1 = 11.322,64 + 5.033,94, e G2 = 11.074,14 + 4.480,35; s?dio G1 = 140,8 + 4,14 mEq/l, e G2 = 139,3 + 4,38 mEq/l; pot?ssio G1 = 4,16 + 0,65 mEq/l, e G2 = 4,18 + 0,47 mEq/l; cloro G1 = 107,4 + 4,69 mEq/l, e G2 = 107,1 + 6,88 mEq/l; e glicose G1 =130,3 + 39,96 mg/dl, e G2 = 123,9 + 36,47 mg/dl. Em todas as vari?veis estudadas o p > 0,05, portanto, pode-se considerar que os produtos Nutri Dextrin e ACP Surgery s?o equivalentes. A aceita??o do ACP Surgery foi de 97%, sem relatos de pigarro ou n?useas (toler?ncia de 100%), sem perda de palatabilidade. Conclui-se que o bioproduto produzido supriu as necessidades e especifica??es dos protocolos de jejum pr?-operat?rio de curta dura??o apresentando aceita??o e toler?ncia compat?vel com o produto comercial ao mesmo tempo em que reduziu os custos e facilitou a execu??o do protocolo. / The preoperative fasting was instituted many years ago, at the beginning of the anesthetic practice, to ensure the emptying of the stomach contents, avoid bronchial aspiration, vomiting, regurgitation, administration of various drugs to reduce gastric acidity and volume. Preoperative fasting protocols suggest shorter fasting periods especially for liquids, providing more comfort to the patient, and less risk of hypoglycemia and dehydration, without increasing the incidence of perioperative pulmonary aspiration. The aim of the study was to assess whether the bioproduct based on coconut water and maltodextrin (ACP Surgery) supplied the needs of clinical trials of ERAS project (Enhanced Recovery After Surgery) with good tolerance and acceptance. It was conducted a prospective, randomized, controlled, double-blind study in humans with a group of 49 patients at the Santa Casa de Misericordia de Fortaleza, to prove the efficiency and effectiveness of ACP Surgery to achieve the goals and planned effects on ERAS project. The experimental groups were: G1 [control group; Nutri Dextrin (Nutrimed, Fortaleza, Cear?); n = 20) and G2 [intervention; ACP Surgery (ACP Biotecnologia, Fortaleza, Cear?;. N = 29]. In the interval between 10 and 20 hours prior to the surgery, blood sample was taken from each patient and sent to the Hospital's Laboratory of Clinics Analysis for measurement of serum levels of total leukocytes, glucose, sodium, potassium and chlorine. The data were submitted to t test (? = 95%, p> 0.05 and t rejection area > 1.96) and expressed as mean and standard deviation. The G1 (Nutri Dextrin) and G2 (ACP Surgery) showed the following results regarding blood tests: total leukocyte G1 = 11,322.64 + 5,033.94, and G2 = 11,074.14 + 4,480.35; sodium G1 = 140.8 + 4.14 mEq/L, and G2 = 139.3 + 4.38 mEq/L; potassium G1 = 4.16 + 0.65 mEq/L, and G2 = 4.18 + 0.47 mEq/L; chloro G1 = 107.4 + 4.69 mEq/L, and G2 = 107.1 + 6.88 mEq/L; and glucose G1 = 130.3 + 39.96 mg/dL, and G2 = 123.9 + 36.47 mg/dL. In all variables p> 0.05, so it can be considered that Nutri Dextrin and ACP Surgery products are equivalent. The acceptance of the ACP Surgery was 97%, with no reports of cough or nausea (100% tolerance), without loss of palatability. It follows that the produced bioproduct met the needs and specifications of preoperative fasting protocols of short duration, showing acceptance and tolerance compatible with the commercial product at the same time reducing costs and facilitating protocol implement.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-18T19:26:57Z No. of bitstreams: 1 VanessaDeFatimaLimaDePaivaMedeiros_TESE.pdf: 805024 bytes, checksum: efb811147a84e64fde7c523a46b27c9c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-18T22:44:14Z (GMT) No. of bitstreams: 1 VanessaDeFatimaLimaDePaivaMedeiros_TESE.pdf: 805024 bytes, checksum: efb811147a84e64fde7c523a46b27c9c (MD5) / Made available in DSpace on 2017-10-18T22:44:14Z (GMT). No. of bitstreams: 1 VanessaDeFatimaLimaDePaivaMedeiros_TESE.pdf: 805024 bytes, checksum: efb811147a84e64fde7c523a46b27c9c (MD5) Previous issue date: 2017-07-28 / Reanima??o e tratamento de choque e sepse s?o controversos e desafiadores. O objetivo deste estudo foi examinar os efeitos da ?gua de coco + NaCl 3% + sinvastatina na reanima??o em modelo murino de sepse abdominal e choque hemorr?gico. Ratos Wistar machos adultos foram submetidos a sepse por ligadura e pun??o do ceco e choque hemorr?gico, e divididos em quatro grupos de reposi??o hidroeletrol?tica. 1. solu??o salina 0,9%; 2. ?gua de coco + NaCl 3%; 3. ?gua de coco + NaCl 3% + sinvastatina (microemuls?o) 10 mg / Kg i.v; 4. ?gua de coco n?o modificada. Escore cl?nico, histologia e fluoresc?ncia do pulm?o foram avaliados neste estudo. Dosagem s?rica das citocinas TNF-?, IL-1? e contagem de leuc?citos foram determinados. O tratamento com ?gua de coco + NaCl 3% + sinvastatina resultou em resultados significativamente melhores de sobreviv?ncia, an?lises bioqu?micas e histopatologia quando comparando com os animais submetidos aos tratamentos ?gua de coco + NaCl 3% e ?gua de coco n?o modificada. Em conclus?o, a ressuscita??o com ?gua de coco com Nacl 3% + sinvastatina teve efeito ben?fico significativo sobre a redu??o dos n?veis de citocinas e na atenua??o de les?es pulmonares em modelo de sepse abdominal e choque hemorr?gico. Tamb?m foi demonstrado que o tratamento com ?gua de coco com Nacl 3% + simvastatina atuou positivamente na fun??o do f?gado e dos rins, e no escore cl?nico. / Resuscitation and treatment of shock and sepsis are controversial and challenging. The aim of this study was to examine the effects of coconut water + Nacl 3%+ simvastatin in resuscitation in a murine model of sepsis and hemorrhagic shock. In methods, adult male Wistar rats were subjected to sepsis by cecal ligation and puncture and hemorrhagic shock assigned to four fluid replenishment groups. Animals received 1. saline 0,9%; 2. coconut water (CW) + NaCl 3%; 3. coconut water + NaCl 3% + simvastatin (microemulsion)10 mg/Kg i.v; 4. Coconut water. Clinical score was determined and lung tissue was assessed for inflammation. Serum cytokines TNF-?, IL-1 ? and leucocytes were measured. The results of this study indicated that coconut water+NaCl 3%+ simvastatin decreased significantly serum cytokines, survival, biochemical analysis and lung histopathological testing when compared to saline, water+NaCl 3% and coconut water. In conclusion, resuscitation with coconut water with Nacl 3%+simvastatin had a significant beneficial effect on downregulating cytokines and decreasing lung injury in a rat model of abdominal sepsis and hemorrhagic shock. We also demonstrated that coconut water with Nacl 3%+simvastatin administration clearly made liver and kidney function better and improved clinical score.