Made available in DSpace on 2014-12-17T14:48:17Z (GMT). No. of bitstreams: 1 NeuberNA_DISSERT.pdf: 3614551 bytes, checksum: 214bf692c54f433fec3b97fdac3c0659 (MD5) Previous issue date: 2014-03-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The construction industry is responsible for generating a lot of waste because of their activities. Consequently, it is noticeable the occurrence of environmental problems in terms of its disposal in inappropriate places. Faced with this problem, some studies have been conducted with the aim of developing technologies and alternatives for recycling construction and demolition waste (CDW), motivated by the scarcity of natural resources and reduction of environmental problems generated. The research aims to characterize the recycled aggregates derived from construction and demolition waste (CDW) produced in the Greater Natal-RN and analyze the performance of mortar coating produced with recycled aggregates. The study includes the chemical , physical and microstructural characterization of recycled aggregates , as well as conducting microscopic analysis and laboratory tests in the fresh state (consistency index , water retention , bulk density and content of entrained air ) and in the hardened state ( compressive strength , tensile strength in bending , water absorption by immersion and capillary , mass density and void ratio ) for mortars produced from different levels of substitution of aggregates ( 0, 20 %, 40 %, 60 %, 80 % and 100 %). The results were satisfactory, providing mortars produced with recycled aggregates, smaller mass density and dynamic modulus values as well as an increase in the rates of absorption and porosity. The tensile strength in bending and compression for TP1 (1:2:8) trait were lower for mortars produced with recycled aggregates and the best result was 20% for replacement. For the TP2 (1:8) mapping, there was an increase in resistance to traction and compression and the best result was for 100% replacement of natural aggregates by recycled. The experiments led to the conclusion that the technical and economic point of view that the mortars produced with recycled aggregates can be used in construction, only if there is an effective control in production processes of recycled aggregate and at the dosage of mortars / A ind?stria da constru??o civil ? respons?vel por gerar uma grande quantidade de res?duos em fun??o de suas atividades, ocasionando problemas ambientais, econ?micos e sociais. Diante dessa problem?tica, alguns estudos v?m sendo realizados com o objetivo de desenvolver tecnologias e alternativas de reciclagem para os res?duos de constru??o e demoli??o (RCD), motivados pela escassez de recursos naturais e pela diminui??o dos problemas ambientais gerados. A pesquisa tem por objetivo caracterizar os agregados reciclados produzidos na Grande Natal-RN e analisar o desempenho de argamassas de revestimento produzidas com estes agregados. O estudo inclui a caracteriza??o qu?mica, f?sica e microestrutural dos agregados reciclados, assim como a realiza??o de an?lises microsc?picas e ensaios laboratoriais das argamassas no estado fresco (?ndice de consist?ncia, reten??o de ?gua, densidade de massa e teor de ar incorporado) e no estado endurecido (resist?ncia a compress?o, resist?ncia a tra??o na flex?o, absor??o de ?gua por imers?o e por capilaridade, densidade de massa e ?ndice de vazios), para argamassas produzidas a partir de diferentes teores de substitui??o de agregados (0, 20%, 40%, 60%, 80% e 100%). Os resultados obtidos foram satisfat?rios, proporcionando ?s argamassas produzidas com agregados reciclados, valores menores de densidade de massa e m?dulo de elasticidade din?mico, assim como um incremento nos ?ndices de absor??o e porosidade. A resist?ncia ? tra??o na flex?o e ? compress?o para o tra?o TP1 (1:2:8) foram inferiores para as argamassas produzidas com agregados reciclados e o melhor resultado foi para 20% de substitui??o. Para o tra?o TP2 (1:8), ocorreu um incremento na resist?ncia ? tra??o e ? compress?o e o melhor resultado foi para 100% de substitui??o dos agregados naturais pelos reciclados. Os experimentos conduziram a concluir que do ponto de vista t?cnico, as argamassas produzidas com agregados reciclados podem ser utilizadas na constru??o civil, desde que haja um controle eficiente nos processos de produ??o do agregado reciclado e na dosagem das argamassas

Made available in DSpace on 2014-12-17T14:52:37Z (GMT). No. of bitstreams: 1 CarlosLC.pdf: 615910 bytes, checksum: 95ed45df182b348344fc8b5fcba2931a (MD5) Previous issue date: 2008-08-12 / This research has aimed at studying the perception of University Hospital Onofre Lopes (HUOL) s workers on the environmental management plan of RSSS. They have been interviewed 250 workers: doctors, nurses, nursing assistants, and cleaners. It was used an exploratory and descriptive research of the type Survey, which aims at obtaining of data or information on characteristics, actions or opinions of any group of people. The questions of the questionnaire were of the kind objective", formulated in a model "scale", analyzed in according to the positioning of the interviewee. The wastes of health service have high potential for environmental impact in the activities from HUOL. Actions or environmental protective policy can improve the image of HUOL. They have been detected divergences on the rigor in application of law of ANVISA. The HUOL s workers unaware of the law of ANVISA and they have little or no knowledge about the practices of environmental control, public health and, they do not know the Environmental Management System ISO 14001. They have divergent views on the degree of importance of ISO 14001. There is not a Waste Management Plan for Health Service and / or is not disclosed for most of HUOL workers. It has not carried out audits or defined the goals and objectives. Besides, it has not been identified legal requirements, and there has not been communication about the service is performed or has been made a critical analysis and no control of documents the environmental management plan. The HUOL have not had a committee of environmental management. The direction of HUOL has not been organized courses, training and recycling of waste on environmental control of the health service. On a scale from 01 to 05, the level of aware level concerning to the waste management from health services of the workers, so is at the threshold between 01 and 02. For the reversal of this situation, the first and urgent step is the creation and institutionalization the environmental management committee of the University Hospital Onofre Lopes / Objetivou-se estudar a percep??o dos servidores do Hospital Universit?rio Onofre Lopes sobre o plano de gest?o ambiental dos RSSS. Foram entrevistados 250 servidores: m?dicos, enfermeiras, auxiliares de enfermagem e de limpeza. A pesquisa foi explorat?ria e descritiva do tipo Survey, que visa ? obten??o de dados ou informa??es sobre as caracter?sticas, a??es ou opini?es de determinado grupo de pessoas. As perguntas do question?rio foram do tipo objetiva , formuladas em um modelo escala , analisadas de acordo com o posicionamento do entrevistado. Os res?duos de servi?o de sa?de possuem elevado potencial de impacto ambiental nas atividades do HUOL. A??es ou pol?tica de prote??o ambiental podem melhorar a imagem do HUOL. Foram detectadas diverg?ncias sobre o rigor na aplica??o da legisla??o da ANVISA. Os servidores do HUOL desconhecem a legisla??o da ANVISA e possuem pouco ou nenhum conhecimento sobre as pr?ticas de controle ambiental de sa?de p?blica e ainda, desconhece o Sistema de Gest?o Ambiental ISO 14001. Possuem opini?es divergentes sobre o grau de import?ncia da ISO 14001. N?o existe um Plano de Gest?o de Res?duos de Servi?o de Sa?de e/ou n?o ? divulgado para a maioria dos servidores do HUOL. N?o acontecem auditorias, n?o s?o definidas as metas e objetivos, n?o s?o identificados os requisitos legais, e n?o existe comunica??o sobre como o servi?o ? executado, n?o ? efetuada uma an?lise cr?tica e n?o h? controle de documentos do plano de gest?o ambiental. O HUOL n?o possui uma comiss?o de gest?o ambiental. A dire??o do HUOL n?o organiza cursos de capacita??o, treinamento e reciclagem sobre controle ambiental de res?duos de servi?o de sa?de. Em uma escala de 01 a 05, o n?vel de conscientiza??o com rela??o ao gerenciamento de res?duos de servi?os de sa?de dos servidores, encontra-se no patamar entre 01 e 02. Para a revers?o deste quadro, o primeiro e urgente passo, ? a cria??o e institucionaliza??o da comiss?o de gest?o ambiental do Hospital Universit?rio Onofre Lopes

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-16T20:26:43Z No. of bitstreams: 1 FlaviaSousaDeOliveira_DISSERT.pdf: 48913373 bytes, checksum: 8725e34968125209c5fa12e80d31bc55 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-18T21:45:29Z (GMT) No. of bitstreams: 1 FlaviaSousaDeOliveira_DISSERT.pdf: 48913373 bytes, checksum: 8725e34968125209c5fa12e80d31bc55 (MD5) / Made available in DSpace on 2016-08-18T21:45:29Z (GMT). No. of bitstreams: 1 FlaviaSousaDeOliveira_DISSERT.pdf: 48913373 bytes, checksum: 8725e34968125209c5fa12e80d31bc55 (MD5) Previous issue date: 2015-12-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A demanda por conforto ambiental em sistemas construtivos, no ?mbito da isola??o e conforto t?rmico, somada ao advento de novas leis que regulam os requisitos m?nimos de conforto, as exig?ncias dos consumidores pela ado??o de m?todos de produ??o mais ?limpos?, incentivaram o desenvolvimento do presente trabalho. O mesmo tem como objetivo caracterizar tecnologicamente as mat?rias-primas: res?duo termopl?stico de bot?o e res?duos de gesso para incorporar ao cimento, visando a produ??o de comp?sitos com propriedades de isola??o t?rmica: condutividade, difusividade, capacidade calor?fica e resistividade. As propriedades f?sicas, estruturais e morfol?gicas das mat?rias-primas foram investigadas atrav?s de an?lises de termogravimetria (TG), difra??o de raios X (DRX), fluoresc?ncia de raios X (FRX) e microscopia eletr?nica de varredura (MEV). Os resultados das an?lises indicaram caracter?sticas adequadas para a produ??o de comp?sito de matriz de cimento com adi??o de res?duos industriais termopl?sticos e res?duo de gesso, apresentando potencial de aplica??o destas mat?rias-primas em comp?sitos com propriedades de isola??o t?rmica. / The demand for environmental comfort in construction systems within the insulation and thermal comfort, plus the advent of new laws regulating the minimum requirements of comfort, disposal of solid industrial waste, construction waste, the requirements of consumers by adopting construction methods "cleaner", encouraged the development of this work. Aims technologically characterize the composite proposed in three types of samples (10%, 30% and 50% of thermoset plastic industrial waste) and raw materials: gypsum waste, cement and plastic thermosetting industrial waste in order to produce the composite with properties of thermal insulation: conductivity, thermal diffusivity, specific heat and resistivity. The physical, structural and morphological properties of the raw materials were investigated by thermogravimetry analysis (TG / DSC), X-ray diffraction (DRX), X-ray fluorescence (FXR) and scanning electron microscopy (MEV). Obtaining mechanical properties through the compression strength test. The analysis results indicate characteristics suitable for cement matrix composite production with the addition of thermosetting plastic industrial waste and gypsum waste, with potential application of these materials in composites with properties of thermal insulation. Finally, assessing what proportion showed up with better performance. Considering the analysis and testing carried out.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:37Z No. of bitstreams: 5 license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) 58.pdf: 746870 bytes, checksum: a321db5fb286c277e81d8737f1744991 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:33:17Z (GMT) No. of bitstreams: 5 license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) 58.pdf: 746870 bytes, checksum: a321db5fb286c277e81d8737f1744991 (MD5) / Made available in DSpace on 2015-02-27T19:33:17Z (GMT). No. of bitstreams: 5 license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) 58.pdf: 746870 bytes, checksum: a321db5fb286c277e81d8737f1744991 (MD5) Previous issue date: 2011 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O objetivo do trabalho foi avaliar os efeitos da aplica??o de glicerina proveniente da transesterifica??o de triglicer?deos de ?leo vegetal por catalisador b?sico KOH como fonte de pot?ssio (?glicerina pot?ssica?), na produtividade e na nutri??o da soja e atributos qu?micos e microbiol?gicos do solo. Foram realizados quatro experimentos, sendo dois em condi??es de campo, em Diamantina e Curvelo no estado de Minas Gerais em dois tipos de solo: Neossolo Quartzar?nico ?rtico t?pico (NQ) e Latossolo Vermelho distr?fico (LVd), respectivamente; e os outros dois experimentos em casa de vegeta??o em Diamantina, com os mesmos dois solos. Os tratamentos foram tr?s doses de ?glicerina pot?ssica? correspondentes 50, 100 e 200 % da dose recomendada de K para a soja e 100 % da dose recomendada de K na forma de cloreto de pot?ssio (KCl) e sulfato de pot?ssio (K2SO4) e um tratamento sem aplica??o de K (Controle). Realizou-se a an?lise qu?mica do solo (pH, P, K, Ca, Mg, Al, H + Al, CO e SO4-2) na colheita da soja e microbiol?gica (respira??o microbiana basal (RB), carbono da biomassa microbiana (CBM) e quociente metab?lico (qCO2)) do solo no in?cio da emerg?ncia das sementes e colheita da soja e os teores foliares dos nutrientes no florescimento da soja nos quatro experimentos, a produtividade da soja nos experimentos de campo e a produ??o por vaso e mat?ria seca nos experimentos na casa de vegeta??o. A produtividade no experimento de campo apresentou diferen?a apenas no NQ, devido ao teor baixo de K no in?cio do per?odo experimental, diferentemente do LVd que apresentava teor m?dio, enquanto no experimento na casa de vegeta??o a ?glicerina pot?ssica? promoveu produ??o de gr?os igual ao do KCl, por?m abaixo de K2SO4 e n?o proporcionou aumento na mat?ria seca da parte a?rea da soja em compara??o ?s outras fontes inorg?nicas (KCl e K2SO4). Na parte qu?mica do solo no experimento de campo a ?glicerina pot?ssica? aumentou os teores de K em ambos os solos, por?m n?o alterando os demais atributos e o estado nutricional da soja, o ?glicerina pot?ssica? supriu parte do K quando este era limitante no solo e no experimento na casa de vegeta??o a ?glicerina pot?ssica? proporcionou aumento nos teores de K no solo e nos teores foliares de K e S na soja cultivada no NQ. O efeito sobre a microbiota do solo do experimento de campo foi vari?vel, sendo que na primeira avalia??o foi alta e na ?ltima estes valores diminu?ram, mostrando que o meio ? capaz de consumir a ?glicerina pot?ssica? e os fertilizantes minerais (KCl e K2SO4). No experimento de casa de vegeta??o, a ?glicerina pot?ssica? ao final do per?odo experimental apresentou tend?ncia de se equilibrar no solo NQ e chegando ao equil?brio no LVd na atividade microbiol?gica do solo. Por?m s?o necess?rios estudos para avaliar a utiliza??o da glicerina pot?ssica em longo prazo para entender melhor a din?mica deste no solo. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT Glycerin is a residue of the biodiesel industry, output from the process of vegetable oil transesterification of triglycerides in basic catalyst that will lead to economic, social and environmental impacts due to increased production of biodiesel in Brazil. The objective of this study was to evaluate the application of glycerin, a biodiesel industry waste, came from vegetable oil transesterification of triglycerides by potassium hydroxide catalyst (KOH) as a source of potassium ("K glycerin") on productivity and nutrition of soybeans and on chemical and microbiological characteristics of the soil. Two experiments were conducted under field conditions in a Oxisol (Typic) soil type, at Curvelo, Minas Gerais state, Brazil, and another in the village of Diamantina, Minas Gerais state in a sand soil type (NQ). The experimental design was randomized blocks with four replications. The treatments were three doses of "glycerin K 'corresponding to 50, 100 and 200% of recommended dose of Potassium for soybean and 100% of the dose recommended in the form of KCl and K2SO4 and a treatment without application of K. The recommended dose of K2O were 120 and 80 kg ha -1 for NQ and Oxisoil, respectively. There has been carried out chemical analysis of soil (pH, P, K, Ca, Mg, Al, Al + H, CO, SO4-2) in the soybean harvest and microbiological analysis (microbial basal respiration (BR), microbial biomass carbon (CBM) and metabolic quotient (OKQ (2)) soil at two times (early emergence and soybean harvest) and soybean yield and foliar concentrations of nutrients in the flowering of soybeans. Soybean yield increased with the application of "glycerin K" when the availability of K in the soil was limited, and although lower than the mineral sources of K, it supplied in part the soybeans need for K. The soil microbiota tended to balance at the end of the cycle of soybeans with application of "glycerin K", thus not causing adverse effects on crop and soil. The "glycerin K" does not cause environmental problems to the place where it was applied, but studies are needed to evaluate its long-term use to better understand the dynamics of soil and crop productivity.

Made available in DSpace on 2014-12-17T14:13:41Z (GMT). No. of bitstreams: 1 LarissaMJS_TESE.pdf: 4008472 bytes, checksum: ac86b2f6644df871874d4b2ab104f409 (MD5) Previous issue date: 2011-11-23 / Universidade Federal do Rio Grande do Norte / Farming of marine shrimp is growing worldwide and the Litopenaeus vannamei (L. vannamei) shrimp is the species most widely cultivated. Shrimp is an attractive food for its nutritional value and sensory aspects, being essential the maintenance of this attributes throughout storage, which takes place largely under freezing. The aim of this research was to evaluate quality characteristics of Litopenaeus vannamei shrimp, during freezing storage and to verify the effect of rosemary (Rosmarinus officinalis) adding. Considering the reutilization of processing shrimp wastes, total carotenoids analysis were conducted in waste of Litopenaeus vannamei shrimp and in the flour obtained after dryer. Monthly physicochemical and sensorial analysis were carried out on shrimp stored at 28,3 ? 3,8?C for 180 days. Samples were placed in polyethylene bags and were categorized as whole shrimp (WS), peeled shrimp (PS), and PS with 0,5% dehydrated rosemary (RS). TBARS, pH, total carotenoid and sensorial Quantitative Descriptive Analysis (QDA) were carried out. Carotenoid total analysis was conducted in fresh wastes and processed flour (0 day) and after 60, 120 and 180 days of frozen storage. After 180 days, RS had lower pH (p = 0.001) and TBARS (p = 0.001) values and higher carotenoids (p = 0.003), while WS showed higher carotenoid losses. Sensory analysis showed that WS were firmer although rancid taste and smell were perceived with greater intensity (p = 0.001). Rancid taste was detected in RS only at 120 days at significantly lower intensity (p = 0.001) than WS and PS. Fresh wastes had 42.74&#956;g/g of total carotenoids and processed flour 98.51&#956;g/g. After 180 days of frozen storage, total carotenoids were significantly lower than 0 day (p<0,05). The addition of rosemary can improve sensory quality of frozen shrimp and reduce nutritional losses during storage. Shrimp wastes and flour of L. vannamei shrimp showed considerable astaxanthin content however, during storage it was observed losses in this pigment / O cultivo do camar?o marinho cresce mundialmente, sendo o Litopenaeus vannamei (L. vannamei), a esp?cie mais cultivada na atualidade. O camar?o ? um alimento atrativo por seu valor nutricional e aspectos sensoriais, sendo essencial, a manuten??o desses atributos ao longo do armazenamento. Os objetivos da presente pesquisa foram avaliar caracter?sticas de qualidade do camar?o L. vannamei adicionado de alecrim (Rosmarinus officinalis) e armazenado sob congelamento, assim como realizar a determina??o da concentra??o de caroten?ides totais dos res?duos do camar?o e da farinha obtida ap?s secagem. As amostras foram colocadas em embalagens de polietileno e estocadas como Camar?o Inteiro (CI), Camar?o Descascado (CD) e Camar?o descascado adicionado de 0,5% de alecrim desidratado (CA). An?lises de TBARS, pH e caroten?ides totais foram realizadas, assim como an?lise sensorial utilizando An?lise Descritiva Quantitativa (ADQ). As an?lises f?sico-qu?micas e sensoriais do camar?o L. vannamei armazenado sob congelamento (-28,3?3,8?C), foram realizadas mensalmente, por um per?odo de 180 dias. Com rela??o ?s an?lises dos res?duos, estas foram realizadas no material in natura e na farinha rec?m-processada (dia 0) e aos 60, 120 e 180 dias de armazenamento sob congelamento. No final do per?odo de armazenamento CA apresentou menor pH (p = 0,001) e valores de TBARS (p = 0,001) e concentra??o mais alta de caroten?ides totais (p = 0,003), enquanto CI demonstrou maior perda de caroten?ides. A an?lise sensorial mostrou maior firmeza para CI, por?m estas amostras apresentaram sabor e cheiro de ran?o em maior intensidade (p = 0,001). Os provadores perceberam sabor de ran?o nas amostras CA apenas aos 120 dias de armazenamento, e em menor intensidade do que nas amostras de CI e CD (p = 0,001). No que se refere ?s an?lises dos res?duos, observou-se concentra??o de 42,74&#956;g/g de caroten?ides totais nos res?duos frescos e 98,51&#956;g/g na farinha rec?m-processada. Ap?s 180 dias de armazenamento sob congelamento, os teores de caroten?ides totais diminu?ram significativamente quando comparados ao dia 0 (p<0,05). A adi??o de alecrim pode melhorar a qualidade sensorial do camar?o congelado e reduzir perdas de seu valor nutricional ao longo do armazenamento sob congelamento. Os res?duos e a farinha do camar?o L. vannamei, apresentaram concentra??o consider?vel de astaxantina, que foi reduzida ao longo do congelamento

Made available in DSpace on 2015-03-03T15:04:51Z (GMT). No. of bitstreams: 1 MichellePC.pdf: 1373679 bytes, checksum: be91ddbd6a6af419bf857a2f8ac3548a (MD5) Previous issue date: 2009-07-31 / A aplica??o de isolantes t?rmicos em sistemas construtivos promove vantagens com vistas ao conforto t?rmico de ambientes. E com isso, o aumento da produtividade em locais de trabalho, a sensa??o de bem-estar e a diminui??o dos custos com climatiza??o. A demanda por conforto ambiental, no ?mbito da isola??o t?rmica, somada ao advento de novas leis que regulam os requisitos m?nimos de conforto, as exig?ncias dos consumidores pela ado??o de m?todos de produ??o mais ?limpos?, a fiscaliza??o quanto ? destina??o de res?duos industriais, al?m da inser??o de produtos no mercado com apelos ambientais, incentivaram o desenvolvimento da presente pesquisa. O presente trabalho trata da aplica??o do poliuretano, visando comparar o desempenho t?rmico do derivado de origem vegetal (?leo de mamona) com adi??o de res?duo pl?stico termofixo em diferentes propor??es (5%, 10%, 15% e 20%), com o poliuretano petrol?fero, a l? de vidro e a l? de rocha atrav?s da an?lise de suas propriedades t?rmicas (condutividade t?rmica ? k, difusividade t?rmica ? e capacidade calor?fica ? Cp). . Ap?s a realiza??o dos ensaios, os comp?sitos estudados foram mo?dos e reutilizados como carga para novos comp?sitos. Com base nos resultados dos ensaios de propriedades t?rmicas, constatou-se que o material desenvolvido conduz menos calor que o poliuretano de petr?leo, a l? de vidro e a l? de rocha, al?m de oferecer alta in?rcia t?rmica, bom desempenho t?rmico e baixo custo. Assim como foi comprovada a possibilidade de fabrica??o de novos comp?sitos para fins de isolamento, reutilizando os comp?sitos testados

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-05T23:00:04Z No. of bitstreams: 1 LiviaDeLourdesDeSousaPinto_DISSERT.pdf: 1563914 bytes, checksum: afff2cde0e6703ffa7b4fae03c2036ac (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-16T22:03:58Z (GMT) No. of bitstreams: 1 LiviaDeLourdesDeSousaPinto_DISSERT.pdf: 1563914 bytes, checksum: afff2cde0e6703ffa7b4fae03c2036ac (MD5) / Made available in DSpace on 2016-02-16T22:03:58Z (GMT). No. of bitstreams: 1 LiviaDeLourdesDeSousaPinto_DISSERT.pdf: 1563914 bytes, checksum: afff2cde0e6703ffa7b4fae03c2036ac (MD5) Previous issue date: 2015-03-13 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Condroitim sulfato (CS) ? um glicosaminoglicano natural presente na matriz extracelular de tecidos conectivos, podendo ser extra?do e purificado desses tecidos. O CS est? envolvido em diversas fun??es biol?gicas, o que pode estar relacionado ? variabilidade estrutural que possui, apesar da simplicidade da cadeia linear dessa mol?cula. Pesquisas na ?rea biotecnol?gica e farmacol?gica com rejeitos provenientes da aquicultura vem sendo desenvolvidas no Brasil. Nas ?ltimas d?cadas, a til?pia (Oreochromis niloticus), peixe nativo da ?frica, tem sido uma das esp?cies mais cultivadas em v?rias regi?es do mundo, inclusive no Brasil. A tilapicultura ? uma atividade economica cujo principal inconveniente ? a grande quantidade de res?duos que s?o descartados pelos produtores. Entende-se que o material descartado pode ser aproveitado em pesquisas como fonte de mol?culas com importante aplica??o biotecnol?gica, o que tamb?m contribui na redu??o de impactos ambientais e favorece o desenvolvimento dessa atividade de maneira ecologicamente correta. Dessa forma, v?sceras de til?pias nil?tica foram submetidas ? prote?lise, em seguida os glicosaminoglicanos foram complexados com resina de troca i?nica (Lewatit), fracionados com volumes crescentes de acetona e purificados atrav?s da cromatografia de troca i?nica DEAE-Sephacel. Na sequ?ncia, a fra??o foi analisada atrav?s de eletroforese em gel de agarose e resson?ncia magn?tica nuclear (RMN). O perfil eletrofor?tico do composto, a an?lise dos espectros 1H de RMN e a correla??o do HSQC permitem afirmar que o composto corresponde a uma mol?cula de condroitim sulfato. O ensaio de MTT foi utilizado para avalia??o da viabilidade celular na presen?a do CS isolado de til?pia e mostrou que o composto n?o ? citot?xico a c?lulas normais provenientes do fibroblasto de embri?o de camundongos (3T3). Ent?o, o composto foi testado quanto a capacidade de reduzir o influxo de leuc?citos em modelo de peritonite aguda (in vivo) induzida por tioglicolato de s?dio. Nesse contexto, foi realizada a contagem total e diferencial de leuc?citos do sangue e l?quido peritoneal coletadas, respectivamente, da veia cava e do lavado peritoneal de cada animal submetido ao experimento. O condroitim sulfato, pela primeira vez isolado de til?pia (CST ), foi capaz de reduzir a migra??o de leuc?citos ? cavidade peritoneal de camundongos inflamados em at? 80,4% na dose de 10?g/kg. Os resultados mostram ainda que houve redu??o significativa (p<0,001) da popula??o de polimorfonucleares do lavado peritoneal nas tr?s doses testadas (0,1?g/kg; 1?g/kg e 10?g/kg) quando comparado ao controle positivo (apenas tioglicolato). Portanto, uma vez que a estrutura e o mecanismo de a??o do CST tenham sido totalmente elucidados, esse composto pode apresentar potencial para uso terap?utico em doen?as inflamat?rias. / Chondroitin sulfate (CS) is a naturally glycosaminoglycan found in the extracellular matrix of connective tissues and it may be extracted and purified those tissues. CS is involved in various biological functions, which may be related to the having structural variability, despite the simplicity of the linear chain structure from this molecule. Researches in biotechnology and pharmaceutical field with wastes from aquaculture has been developed in Brazil. In recent decades, tilapia (Oreochromis niloticus), native fish from Africa, has been one of the most cultivated species in various regions of the world, including Brazil. The tilapia farming is a cost-effective activity, however, it generates large amount of wastes that are discarded by producers. It is understood that waste from tilapia can be used in research as a source of molecules with important biotechnological applications, which also helps in reducing environmental impacts and promote the development of an ecofriendly activity. Thus, nile tilapia viscera were subjected to proteolysis, then the glycosaminoglycans were complexed with ion exchange resin (Lewatit), it was fractionated with increasing volumes of acetone and purified by ion exchange chromatography DEAE-Sephacel. Further, the fraction was analyzed by agarose gel electrophoresis and nuclear magnetic resonance (NMR). The electrophoretic profile of the compound together the analysis of 1H NMR spectra and the HSQC correlation allow to affirm that the compound corresponds to a molecule like chondroitin sulfate. MTT assay was used to assess cell viability in the presence of CS tilapia isolated and showed that the compound is not cytotoxic to normal cells such as cells from the mouse embryo fibroblast (3T3). Then, this compound was tested for the ability to reduce the influx of leukocytes in model of acute peritonitis (in vivo) induced by sodium thioglycolate. In this context, it was done total and differential leukocytes counting in the blood and peritoneal fluid collected respectively from vena cava and the peritoneal cavity of the animals subjected to the experiment. The chondroitin sulfate for the first time isolated from tilapia (CST ) was able to reduce the migration of leukocytes to the peritoneal cavity of inflamed mice until 80.4 per cent at a dose 10?g/kg. The results also show that there was a significant reduction (p<0.001) of the population of polymorphonuclear leukocytes from peritoneal cavity in the three tested doses (0.1?g/kg; 1?g/kg and 10?g/kg) when it was compared to the positive control (just thioglycolate). Therefore, since the CST structure and mechanism of action has been completely elucidated, this compound may have potential for therapeutic use in inflammatory diseases

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-29T21:36:02Z No. of bitstreams: 1 RaimundoJorgeSantosParanhos_TESE.pdf: 4812222 bytes, checksum: a3fafdef35f0753c7d1a15d6d7faed55 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-01T00:42:05Z (GMT) No. of bitstreams: 1 RaimundoJorgeSantosParanhos_TESE.pdf: 4812222 bytes, checksum: a3fafdef35f0753c7d1a15d6d7faed55 (MD5) / Made available in DSpace on 2016-03-01T00:42:05Z (GMT). No. of bitstreams: 1 RaimundoJorgeSantosParanhos_TESE.pdf: 4812222 bytes, checksum: a3fafdef35f0753c7d1a15d6d7faed55 (MD5) Previous issue date: 2015-02-23 / O presente estudo tem como objetivo avaliar a potencialidade da utiliza??o das cinzas do baga?o da cana-de-a??car (CBC) como fundente, em substitui??o ao filito e/ou ao feldspato na massa padr?o para produ??o industrial de porcelanato esmaltado, verificando a possibilidade de as CBC contribu?rem para a redu??o do coeficiente de expans?o t?rmica global da massa cer?mica. Para isso, como um resultado da pesquisa, foram caracterizadas as mat?rias-primas componentes da massa padr?o (argila, filito, caulim, feldspato, quartzo e talco) e o res?duo das CBC, por meio de ensaios por FRX, DRX, AG, ATD e ATG. Foram confeccionados corpos de prova (CDP) nas dimens?es de 100 mm x 50 mm x 8 mm em matriz uniaxial, sob press?o de compacta??o de 33 MPa, reunidos em lotes de 3 unidades, posteriormente sinterizados nas temperaturas de 1150 ?C ? 1210 ?C variando a escala de avalia??o em 10 ?C, rampa de aquecimento e resfriamento de 50 ?C/min e 25 ?C/min, com tempo de patamares de 1 min, 3 min, 5 min, 8 min, 10 min, 15 min, 30 min e 60 min., analisando os resultados das propriedades f?sicas de absor??o de ?gua (AA), retra??o linear de queima (RLq), an?lise dilatom?trica (ADT), tens?o de resist?ncia ? flex?o (TRF) e MEV dos corpos sinterizados, a fim de verificar a adequa??o dos CDP ?s normas ISO 13006, ISO 10545, NBR 13816; NBR 13817 e NBR 13818. O estudo mostrou que as formula??es que mais atendem aos requisitos das normas s?o: a G4 ? na qual se aplicou 10% de CBC em substitui??o ao filito, temperatura de sinteriza??o de 1210 ?C e tempo de patamar de 10 min., e F3 ? com aplica??o de 7,5% de CBC em substitui??o ao feldspato, nas temperaturas de sinteriza??o de 1190 ?C, 1200 ?C e 1210 ?C e tempo de patamar de 10 min. Essas formula??es apresentaram melhor desempenho quanto ? forma??o de cristais de mulita, com redu??o consider?vel de trincas e poros, atendendo aos pr?- requisitos das normas para porcelanato esmaltado. A an?lise dos resultados comprova que a utiliza??o da CBC como fundente na prepara??o de massa para porcelanato atende aos par?metros normalizados para fabrica??o desse produto, e, com isso, pode-se reduzir o impacto ambiental e o custo de produ??o. Portanto, ? recomendada a utiliza??o desse res?duo na ind?stria ceramista, por conta de sua viabilidade industrial, comercial e colaborativa para a sustentabilidade. / The present study aims to evaluate the potential use of bagasse ash from sugar cane (CBC) as a flux, replacing phyllite and/or feldspar in standard industrial mass production of enameled porcelain, verifying the possibility of the CBC contribute to the overall reduction of the coefficient of thermal expansion of the ceramic mass. To this end, as a result of the research, we characterized the raw material components of the standard mass (clay, phyllite, kaolin, feldspar, quartz and talc) and the residue of BCC, by testing by XRF, XRD, AG, DTA and ATG. Specimens (CDP) were manufactured in the dimensions of 100 mm x 50 mm x 8 mm in uniaxial matrix under compaction pressure of 33 MPa, assembled in batches of 3 units subsequently sintered at temperatures of 1150?C to 1210?C by varying the Rating Scale at 10?C, heating and cooling ramp of 50?C/min and 25?C/min, with levels of 1 min, 3 min, 5 min, 8 min, 10 min, 15 min, 30 min and 60 min. analyzing the results of the physical properties of water absorption (WA), linear firing shrinkage (LFS), dilatometric analysis (DTA), flexural strain (SFT) and SEM of the sintered bodies in order to verify the adequacy of CDP to ISO 13006, ISO 10545, NBR 13816 standards; NBR 13817 and NBR 13818. The study showed that the formulations that best suit the requirements of the standards are:. G4 - which was applied in 10% of replacing the CBC phyllite, sintering temperature 1210 ? C for 10 min and porch, and F3 - with application of 7.5% of CBC to replace the feldspar in the sintering temperatures of 1190?C, 1200?C and 1210?C for 10 min and porch. These formulations showed better performance regarding the formation of primary and secondary mullite, with considerable reduction of cracks and pores, meeting the prerequisites of standards for glazed porcelain. The results shows that the use of the CBC as a flux in the preparation of porcelain mass meets standard parameters for the manufacture of the product, and thereby can reduce environmental impact and the cost of production. Therefore, it is recommended to use this residue in the ceramics industry, due to its industrial, commercial and collaborative viability for sustainability.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-10T22:28:10Z No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-05-17T00:41:54Z (GMT) No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) / Made available in DSpace on 2016-05-17T00:41:54Z (GMT). No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) Previous issue date: 2015-05-18 / Intensas mudan?as socioecon?micas, ocorridas no final da d?cada de 1970, decorrentes do processo de internacionaliza??o da economia, impulsionaram a produ??o e o consumo de equipamentos eletr?nicos em todo o mundo. Como resultado, houve um incremento na demanda por recursos naturais para sua fabrica??o, e uma maior quantidade e diversidade de res?duos sendo gerados e depositados de forma inadequada sobre o planeta Terra, acarretando a degrada??o do meio ambiente. Esse contexto imp?e um novo desafio ?s Institui??es Educacionais de Ensino Superior (IFES): gerir e gerenciar de modo ambientalmente sustent?vel os seus Res?duos de Equipamentos Eletr?nicos (REEs). Nessa perspectiva este trabalho aborda o tema em dois cap?tulos. O primeiro traz, por meio de pesquisa explorat?ria bibliogr?fica qualitativa com base em livros, artigos, disserta??es e legisla??o a an?lise comparativa da intera??o entre a Agenda Ambiental na Administra??o P?blica e a Pol?tica Nacional de Res?duos S?lidos, e suas Contribui??es para Pr?ticas Sustent?veis na Administra??o P?blica. O estudo fornece, assim, evid?ncias da intera??o e contribui??o de ambos os marcos para a pr?tica de a??es sustent?veis na gest?o e no gerenciamento dos res?duos s?lidos, contemplando a dimens?o social, econ?mica e ambiental, demonstrando que o longo caminho a se percorrer em prol da sustentabilidade do desenvolvimento n?o desqualifica as contribui??es desses instrumentos ?s institui??es que a eles aderirem. No cap?tulo seguinte este trabalho aborda a Gest?o e o Gerenciamento de Res?duos de Equipamentos Eletr?nicos no ?mbito do Campus Central da Universidade Federal do Rio Grande do Norte (UFRN) a fim de analisar o atual sistema de gest?o e gerenciamento dos REEs gerados. Para a observa??o pretendida, a investiga??o fez uso de estudo de caso e de pesquisa explorat?ria qualitativa e quantitativa. Trata de um contexto local cuja dimens?o tem abrang?ncia global, uma vez que a degrada??o ambiental decorrente do consumo exacerbado de equipamentos eletr?nicos e da destina??o inadequada dos REEs representa um fen?meno que afeta significativamente, de modo negativo, a qualidade do ecossistema, a seguran?a e a sa?de dos habitantes da Terra. Os resultados da pesquisa indicam que as condi??es de armazenamento dos REEs, bem como o processo de coleta nas unidades amostrais s?o inadequados; e, ainda, h? car?ncia de um centro de triagem e recupera??o de REEs, de pessoal capacitado e de ferramentas adequadas para a efic?cia desse processo; e detectam defici?ncia na pol?tica de incentivo aos processos de redu??o, reutiliza??o e reciclagem preconizada pela A3P e PNRS. Dessa forma, sugere medidas j? aplicadas em caso semelhante em outra Institui??o P?blica a fim de mitigar os problemas decorrentes da gest?o e do gerenciamento inadequados dos REEs. / The intense socioeconomic changes that occurred in the late 1970s, arising from the process of internationalization of the economy, boosted the production and consumption of electronic equipments all over the world. As a result, there was an increase in demand for natural resources for their manufacturing, and a greater quantity and variety of wastes were being generated and deposited inappropriately on Earth, leading to the degradation of the environment. This context imposes a new challenge to the Educational Institutions of Higher Education (EIHE)1: manage and administrate in an environmentally sustainable manner their Electronic Equipment Waste (EEW)2. This study approaches the theme through the perspective of an analysis of the interaction between the Environmental Agenda in Public Administration and the Solid Waste National Policy and their contributions to sustainable practices, having as reference the Central Campus of the Federal University of Rio Grande do Norte (UFRN), considering their management and administration system of the EEW generated there. The study provides the evidences of the interaction and contribution of both those milestones for the practice of sustainable actions in management and administration of solid wastes, including the social, economical and environmental dimension, demonstrating that the long way to go in support of the sustainable development does not disqualify the contributions of these instruments to the institutions that start to use them. Methodologically, the investigation was guided by a bibliographical, documentary and field research. To the intended observation, we have done the research using case study and qualitative and quantitative exploratory research. It is a local context which has a global dimension, because the environmental degradation resulting from excessive consumption of electronic equipments and inadequate disposal of the EEW represents a phenomenon that affects significantly and negatively the quality of the ecosystem, the safety and the health of the inhabitants of the Earth. The research results indicate that the storage conditions of the EEW, as well as the process of collecting the sample units is inadequate; there is no requirement of showing the Certification of Environmental Sustainable Final Disposal of the EEW by the participants in the battling bidding, both in the public notice, by the Permanent Commission of Bidding, as in the time of gathering the EEW, by the Department of Material and Patrimony; and that there is the lack of a center for sorting and recovery of such waste, competent staff and adequate tools for the effectiveness of this process. These results also detect lacks in the politics, advocated by A3P and PNRS, to encourage the processes of reduction, reuse and recycling. So, it suggests measures that have already been applied in a similar case at another Public Institution in order to mitigate the problems arising from the inadequate management and administration of the EEW.

Made available in DSpace on 2014-12-17T14:52:43Z (GMT). No. of bitstreams: 1 DyannaKPT.pdf: 1903160 bytes, checksum: 7c3883d6f7fda414107e4ab8d4d79604 (MD5) Previous issue date: 2009-07-03 / According to great concern between the developed industrial activities and resultant impacts over the environment, an association of several factors have occurred, procedures to the efficient management of the rotation between economical development and the environment have been improved. A research in field have been realized inside building sites of companies in order to provide knowledge about the implemented and accomplish actions according to the resolution from CONAMA n?307. Trough the interview among the representations of the companies and photographic survey in loco, such as, what makes the companies implement this management, reutilization and recycling, transport and disposition. The present study had as objective: analyze the insertion of the used tools to residuals management, proposing improvements, in a way that it can be easily identified during the procedures execution in the building sites of the building companies of the city of Natal/RN. To reach the goal, in the first place a revision of the pertinent literature was performed; there for, it can be seen the relation between residues management and environment sustainability, once it happens in a continued way it may prevent the waste and reduces the risk that the activities way bring to the employees, community and environment; once found the great difficult faced with regard to labors, material, equipment, project, planning, costumer s interference, furnisher. And still, it could be verified wich materials generate greater indexes of residues in the works and the main occurrences of waste and loss. However a greater transparency is needed coming from the high administration in the commitment with the continued actions, to make it so, there must be a cultural change inside the company. There for there will be a greater productivity and quality of the under taking such as costumer s satisfaction / Devido a maior preocupa??o entre as atividades industriais desenvolvidas e os impactos resultantes sobre o meio ambiente, uma associa??o de in?meros fatores tem ocorrido, procedimentos para o gerenciamento eficaz das rela??es entre desenvolvimento econ?mico e meio ambiente vem sendo aperfei?oados. Foi realizado um trabalho de campo, dentro dos canteiros de obras das empresas para que se possa ter conhecimento das a??es implementadas e cumpridas segundo a Resolu??o do CONAMA n? 307. Atrav?s de entrevista junto a representantes da empresa e levantamento fotogr?fico in loco; assim como o que leva as empresas a implementar este gerenciamento, reutiliza??o e reciclagem, transporte e disposi??o. O presente estudo teve como objetivo analisar a inser??o das ferramentas utilizadas para o gerenciamento de res?duos, propondo melhorias, de forma que as mesmas possam ser mais facilmente identificadas durante a execu??o dos processos no canteiro de obras de empresas construtoras da cidade de Natal-RN. Para atingir este objetivo, primeiramente, foi efetuada uma revis?o da literatura pertinente, na qual foi observado que o gerenciamento de res?duos relaciona-se com a sustentabilidade ambiental, uma vez que de forma continuada previne a gera??o de desperd?cio e reduz os riscos das atividades sobre os funcion?rios, comunidade e meio ambiente; sendo constatadas as maiores dificuldades enfrentadas em rela??o ? m?o-de-obra, materiais, equipamento, projeto, planejamento, interfer?ncia do cliente, fornecedores. E ainda se pode constatar quais os materiais que geram maior ?ndice de res?duos nas obras e as principais ocorr?ncias das perdas e desperd?cios. Entretanto, se faz necess?ria maior transpar?ncia da alta administra??o no comprometimento com a continuidade das a??es, para que a partir disto possa haver uma mudan?a de cultura instalada nas empresas, gerando maior produtividade, qualidade dos empreendimentos e uma maior satisfa??o dos clientes