Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-04T19:29:14Z No. of bitstreams: 1 KlaytaBenignoRamalhoDantas_DISSERT.pdf: 2222985 bytes, checksum: a81e268c2181aa4b584c325fd5f160aa (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-09T23:33:02Z (GMT) No. of bitstreams: 1 KlaytaBenignoRamalhoDantas_DISSERT.pdf: 2222985 bytes, checksum: a81e268c2181aa4b584c325fd5f160aa (MD5) / Made available in DSpace on 2017-10-09T23:33:02Z (GMT). No. of bitstreams: 1 KlaytaBenignoRamalhoDantas_DISSERT.pdf: 2222985 bytes, checksum: a81e268c2181aa4b584c325fd5f160aa (MD5) Previous issue date: 2017-07-28 / O entendimento dos professores sobre as principais dificuldades dos estudantes na aprendizagem de conceitos biol?gicos pode auxili?-los na utiliza??o de novas estrat?gias de ensino, que sejam motivadoras, possibilitando assim a constru??o do conhecimento e a aprendizagem de forma significativa. Novas estrat?gias de ensino s?o importantes potencializadores de aprendizagem, principalmente quando se trata de conte?dos abstratos e de dif?cil compreens?o, como ocorre com o estudo da citologia. Assim, o objetivo deste trabalho consistiu da elabora??o e desenvolvimento de uma unidade did?tica (UD) sobre a morfofisiologia da membrana plasm?tica, envolvendo um jogo did?tico digital como ferramenta de avalia??o da aprendizagem. A pesquisa foi desenvolvida com 36 estudantes da 1? s?rie do ensino m?dio na Escola Estadual Almirante Tamandar?- Extremoz/RN. O Percurso metodol?gico foi desenvolvido em cinco etapas: 1?) Elabora??o e planejamento das atividades da unidade did?tica de acordo com o calend?rio escolar; 2?) Identifica??o dos conhecimentos pr?vios dos alunos; 3?) elabora??o de um jogo did?tico digital para compor a UD; 4?) constru??o e aplica??o de uma UD baseada na aprendizagem significativa; 5?) avalia??o das possibilidades e limita??es da UD. A metodologia utilizada apresenta alguns elementos da pesquisa-a??o e para a coleta de dados foram utilizados question?rios, modelos, observa??o participante, al?m do desempenho dos estudantes no jogo digital. Foi utilizada a an?lise quanti-qualitativa incluindo alguns elementos da an?lise de conte?do. Os resultados demonstram que os estudantes do ensino m?dio apresentam um conhecimento escasso sobre a c?lula e sua morfofisiologia. A unidade did?tica contribuiu para a aprendizagem significativa quanto aos conceitos de citologia estudados, al?m de sensibilizar os estudantes quanto ao desenvolvimento de atitudes e procedimentos positivos. O jogo foi eficiente para avaliar a aprendizagem al?m de despertar a motiva??o e participa??o dos estudantes na resolu??o de quest?es. Portanto, a Unidade did?tica explorando o jogo did?tico digital constituiu uma experi?ncia de pesquisa em ensino que potencializou a constru??o de um produto educacional poss?vel de ser utilizado no ensino b?sico considerando o ensino-aprendizagem de transporte de subst?ncias pela membrana plasm?tica. / The understanding of teachers on the main difficulties their students face on learning biological concepts might aid them to adopt new motivating teaching strategies, thusly transforming significantly the students? learning process and their acquisition of knowledge. New teaching strategies are important enhancers of the learning process, mainly when it comes to complex abstract concepts, as those which occur on the study of Cytology. This way, the present work aimed at the crafting and application of a didactic unit (DU) on the morphophysiology of the plasma membrane, through a educational game as learning evaluation tool. This research was conducted with 36 students of the freshman year of high-school at Almirante Tamandar? State School, in Extremoz/RN. The method application was developed in five stages: 1st) Crafting and planning the didactic unit?s exercises in accordance to the original school schedule; 2nd) Assessing students? background knowledge; 3rd) Designing a digital educational game as part of the DU; 4th) Crafting and application of a DU based on the significant learning; 5th) Evaluation of the potential and limitations of the DU. The methods used demonstrate some of the elements of the research-action. As for the data collection, questionnaires, models, participant observations, and the performance of the students in the digital game were used. A quantitative/qualitative analysis was used, including the content analysis. The obtained results point at the students? scarce knowledge about the cell and its morphophysiology. The didactic unit contributed to a significant learning of the biological concepts discussed, and moreover, it promoted a positive student behavior. The game was efficient to evaluate their learning and to engage students into problem solving. Therefore, the Didactic Unit exploring the digital didactic game constitutes a teaching research experience which led to the manufacturing of an educational product that can be used on elementary schools considering the teaching-learning of substance transportation through the plasmatic membrane.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-01T21:47:47Z No. of bitstreams: 1 AllysonFernandesDaCostaSilva_DISSERT.pdf: 1659813 bytes, checksum: 0de7287ef5c2c4ae621833638c04aa5f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-08T00:21:06Z (GMT) No. of bitstreams: 1 AllysonFernandesDaCostaSilva_DISSERT.pdf: 1659813 bytes, checksum: 0de7287ef5c2c4ae621833638c04aa5f (MD5) / Made available in DSpace on 2017-11-08T00:21:06Z (GMT). No. of bitstreams: 1 AllysonFernandesDaCostaSilva_DISSERT.pdf: 1659813 bytes, checksum: 0de7287ef5c2c4ae621833638c04aa5f (MD5) Previous issue date: 2017-06-30 / Problemas de localiza??o buscam determinar as melhores posi??es onde devem ser instaladas facilidades de modo a atender demandas existentes. Pela vasta aplicabilidade da ?rea, diversas caracter?sticas j? foram importadas aos modelos para melhor representar situa??es pr?ticas. Uma delas generaliza os modelos cl?ssicos para situa??es em que decis?es de localiza??o devem ser tomadas periodicamente. Outra, permite que modelos tratem do dimensionamento das capacidades como uma vari?vel do problema. O Problema Din?mico de Localiza??o de Facilidades com Capacidades Modulares unifica estas e outras caracter?sticas presentes em problemas de localiza??o num ?nico e generalizado modelo. Este problema foi recentemente formulado na literatura, onde uma abordagem exata foi introduzida e aplicada a inst?ncias derivadas de um estudo de caso no contexto da explora??o de recursos florestais. Neste trabalho ser? apresentado um m?todo alternativo para resolver o mesmo problema. O m?todo escolhido utiliza a estrutura da metaheur?stica Algoritmo Gen?tico e a hibridiza com uma rotina de Descida em Vizinhan?a Vari?vel com tr?s vizinhan?as de busca adaptadas de vizinhan?as aplicadas a outros problemas de localiza??o. Experimentos atestaram a efetividade da metaheur?stica h?brida desenvolvida em compara??o ? aplica??o dos m?todos puros. Na compara??o com o m?todo exato, a heur?stica se mostrou competente ao chegar a solu??es at? 0,02% de dist?ncia do ?timo na maioria das inst?ncias testadas. / Location problems aim to determine the best positions where facilities should be installed in order to meet existing demands. Due to its wide applicability, several characteristics have already been appended to the models to better represent real situations. One of them generalizes classical models to the case that location decisions should be taken periodically. Another allows models to deal with capacity sizing as a problem variable. The Dynamic Facility Location Problem with Modular Capacities unifies these and other characteristics present in location problems in a single and generalized model. This problem was recently formulated in literature where an exact approach was introduced and applied to instances of a case study in the context of the forestry sector. We present an alternative method to solve the same problem. The method chosen uses a Genetic Algorithm metaheuristic framework and hybridizes it with a Variable Neighborhood Descent routine with three neighborhoods adapted from others applied to location problems. Experiments attested the effectiveness of the hybrid metaheuristic developed in comparison to the use of those methods purely. Compared to the exact approach, the heuristic proved to be competent by finding solutions up to a gap of 0,02% to the global optimum in the majority of the instances tested.

Submitted by Luis Ricardo Andrade da Silva (lrasilva@uefs.br) on 2016-02-22T22:50:07Z No. of bitstreams: 1 Disserta??o_Alex_RGV_Final2.pdf: 2862200 bytes, checksum: e222cf5496c76484ec34f8fdd9012d23 (MD5) / Made available in DSpace on 2016-02-22T22:50:07Z (GMT). No. of bitstreams: 1 Disserta??o_Alex_RGV_Final2.pdf: 2862200 bytes, checksum: e222cf5496c76484ec34f8fdd9012d23 (MD5) Previous issue date: 2015-11-16 / Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq / In Brazil, research on Arecaceae pollen grains are related to melissopalynology, the palynotaxonomy, being scarce the physiology of pollen. Reproductive biology studies pollination are of great importance in different cultures, from their results can obtain parameters to be used to obtain a considerable increase in the production of croops, as well as the size and quality of fruits, helping for good economic income of the producers. In vitro pollen germination also allows you to check its viability and reproductive strength, and are important tools in breeding programs of plants, assisting in the selection of the most effective genotypes and training hybrids. The chapter one of this work consists of evaluation of the type of culture medium and implications on the choice of micronutrients which form part of its composition, as well as the pretreatment of specimens. It was observed that oil palm pollen (Elaeis guineensis Jacq.) Showed an increase in germination rates after being dissected for a period of four hours and the culture medium with only boric acid and calcium nitrate, in addition to the power source (sucrose) are efficient to display their germination potential. Chapter two contained in the evaluation glycoconjugate (lectins) on the pollen germination of oil palm, which was discussed metabolic interactions of these processes. Lectins are important regulators and operate in recognition and acknowledgment of pollen on the pistil and can act as genetic incompatibility factors. Germination was evaluated in BCa means (boron and calcium) with the addition of lectins: Crotalaria pallida lectin (CPL), Concanavalin A (ConA) and Jacalin (JAC) in two concentrations. An increase of the germination rate in the presence of ConA and CPL lectins and inhibition in the presence of JAC. The results of this study were valuable, since aggregate informative values and extend discussions on the processes involving the germination of pollen grains and formation of pollen tubes of oil palm. / No Brasil, pesquisas com gr?os de p?len da fam?lia Arecaceae est?o relacionados ? melissopalinologia e palinotaxonomia, sendo escassos aqueles voltados ? fisiologia do p?len. Estudos de biologia reprodutiva relacionados ? poliniza??o s?o de grande import?ncia nas diversas culturas, visto que a partir dos seus resultados pode se obter par?metros a serem utilizados visando o aumento consider?vel da produ??o de plantas cultivadas, bem como no tamanho e na qualidade dos frutos, contribuindo para bons rendimentos econ?micos dos produtores. A germina??o de gr?os de p?len in vitro tamb?m permite verificar seu vigor reprodutivo, sendo importante ferramentas em programas de melhoramento gen?tico de plantas, auxiliando na sele??o de gen?tipos mais eficazes para cruzamentos e forma??o de h?bridos. O cap?tulo um deste trabalho teve como prop?sito avaliar o tipo de meio de cultura e as implica??es da escolha dos micronutrientes que fazem parte da sua composi??o, bem como do tratamento pr?vio das amostras. Foi observado que o p?len de dendezeiro (Elaeis guineensis Jacq.) apresentou aumento nas taxas de germina??o depois de ser desidratado por um per?odo de quatro horas e que o meio de cultura com apenas ?cido b?rico e nitrato de c?lcio, al?m da sacarose como fonte de energia, s?o eficientes para exibir o potencial germinativo. O cap?tulo dois consta da avalia??o de prote?nas glicoconjugadas (lectinas) sobre a germinabilidade pol?nica do dendezeiro. Foram discutidas as intera??es metab?licas desses processos, bem como o papel das lectinas que s?o importantes reguladores sobre a recogni??o e reconhecimento do p?len no pistilo, podendo atuar como fatores de incompatibilidade gen?tica. Foi avaliada a germina??o em meio BCa (boro e c?lcio) com adi??o das lectinas: Lectina de Crotalaria pallida Aiton (CPL), Concanavalina A (ConA) e Jacalina (JAC), em duas concentra??es. Verificou-se aumento das taxas de germina??o na presen?a das lectinas CPL e ConA e inibi??o da germina??o na presen?a da JAC. Os resultados deste trabalho agregam valores informativos sobre a compreens?o da biologia reprodutiva de dendezeiro (Arecaceae) ocorrente na ?Costa do Dend??/Bahia e ampliam as discuss?es sobre os processos que envolvem a germina??o de gr?os de p?len e forma??o dos tubos pol?nicos.

Made available in DSpace on 2014-12-17T15:42:31Z (GMT). No. of bitstreams: 1 ClaudioLV.pdf: 1496908 bytes, checksum: 9da02c26d9351b21019488117fc27924 (MD5) Previous issue date: 2007-05-28 / Dispersions composed of polyelectrolyte complexes based on chitosan and poly(methacrylic acid), PMAA, were obtained by the dropping method and template polymerization. The effect of molecular weight of PMAA and ionic strength on the formation of chitosan/poly(methacrylic acid), CS/PMAA, complexes was evaluated using the dropping method. The increase in molecular weight of PMAA inhibited the formation of insoluble complexes, while the increase in ionic strength first favored the formation of the complex followed by inhibiting it at higher concentrations. The polyelectrolyte complexation was strongly dependent on macromolecular dimensions, both in terms of molecular weight and of coil expansion/contraction driven by polyelectrolyte effect. The resultant particles from dropping method and template polymerization were characterized as having regions with different charge densities: chitosan predominating in the core and poly(methacrylic acid) at the surface, the particles being negatively charged, as a consequence. Albumin was adsorbed on templatepolymerized CS/PMAA complexes (after crosslinking with glutardialdehyde) and pH was controlled in order to obtain two conditions: (i) adsorption of positively charged albumin, and (ii) adsorption of albumin at its isoelectric point. Adsorption isotherms and zeta potential measurements showed that albumin adsorption was controlled by hydrogen bonding/van der Waals interactions and that brushlike structures may enhance adsorption of albumin on these particles / Dispers?es formadas a partir de complexos polieletrol?ticos de quitosana e de poli(?cido metacr?lico), PMAA, foram obtidas tanto pelo m?todo de gotejamento, como pelo m?todo de polimeriza??o em molde. O efeito da massa molar do PMAA e da for?a i?nica na forma??o dos complexos de quitosana/poli(?cido metacr?lico), CS/PMAA, foi avaliado usando o m?todo de gotejamento. O aumento da massa molar do PMAA inibiu a forma??o dos complexos insol?veis, enquanto o aumento da for?a i?nica primeiramente favoreceu a forma??o dos complexos, depois a inibiu, em altas concentra??es de eletr?litos de baixa massa molar. A complexa??o dos polieletr?litos foi fortemente dependente das dimens?es macromoleculares, tanto em termos da massa molar quanto do efeito de expans?o/contra??o dos novelos, devido ao efeito polieletrol?tico. As part?culas resultantes tanto do m?todo de gotejamento, como da polimeriza??o em molde foram caracterizadas por apresentarem regi?es com diferentes densidades de carga: a quitosana predominantemente presente na regi?o central e o poli(?cido metacr?lico), na superf?cie, sendo, portanto, as part?culas carregadas negativamente. A albumina foi adsorvida nos complexos de CS/PMAA obtidos por polimeriza??o em molde (depois de sofrerem reticula??o covalente usando glutaralde?do) e o pH foi controlado a fim de se obter duas condi??es: (i) adsor??o de albumina carregada positivamente e (ii) adsor??o de albumina em seu ponto isoel?trico. As isotermas de adsor??o e as medidas de potencial zeta mostraram que a adsor??o da albumina foi controlada por liga??es de hidrog?nio/intera??es de van der Waals e que as estruturas em forma de escova puderam aumentar a adsor??o da albumina nessas part?culas

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-03-07T15:22:05Z No. of bitstreams: 1 2017 - Gabriela Vieira do Amaral.pdf: 1320069 bytes, checksum: bc0ab4f1fe7a912edee70092297020a1 (MD5) / Made available in DSpace on 2018-03-07T15:22:12Z (GMT). No. of bitstreams: 1 2017 - Gabriela Vieira do Amaral.pdf: 1320069 bytes, checksum: bc0ab4f1fe7a912edee70092297020a1 (MD5) Previous issue date: 2017-07-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Emerging supercritical carbon dioxide (SCCD) technology has been studied as a cold pasteurizing agent, however, few studies are available on its efficiency in dairy products. In this study, the effects of SCCD processing by different pressures 14, 16 and 18 MPa (35 ? 2 ?C / 10 min) on whey drink, whey drink and grape juice were investigated in comparison To conventional pasteurization (heat treatment at 72 ?C / 15 s). Physicochemical analyzes of pH, titratable acidity, total soluble solids, phenolic compounds, anthocyanins, antioxidant activity, angiotensin converting enzyme (ACE) inhibitory activity and volatile compounds were performed. The color, particle size, rheology, physical stability, as well as microbiological quality and sensory analysis of beverages were also smoothed. The results of this study evidenced the absence of differences between treatments in pH, titratable acidity, soluble solids, total anthocyanins and DPPH activity (p> 0.05). A direct relationship between SCCD pressure and ACE inhibitory activity was observed, with 34.63, 38.75 and 44.31% (14, 16 and 18 MPa, respectively). Few differences were found in the volatile compounds profile. The beverage processing by SCCD resulted in a product with lower particle diameter, lower consistency index and a reduction in pseudoplastic character compared to the beverage treated by the conventional process. No effect of high pressure CO2 on the sensorial attributes of the drink was observed for the studied levels. Consumers found no difference between CO2 treated beverages and heat-treated beverages. The results confirm the processing of SCCD as a promising technology for the non-thermal treatment of grape whey drink made available a health and wellness promoter beverage. Background: Non-thermal food processing is configured as an interesting alternative for the food industry due to the increased nutrient retention and minimal sensory changes in processed products. Scope and approach: The aim of this review is to address the potential of supercritical carbon dioxide technology, emphasizing milk and dairy processing, including the historical aspects, main advantages, microbial inactivation mechanisms, as well as effects in some quality parameters of dairy products. Key findings and conclusions: The use of supercritical carbon dioxide technology (SC-CO2) presents great potential application in dairy processing, since it is effective to reduce microbial load when compared to the pasteurization process, thus obtaining a product with greater shelf life and better organoleptic properties with minimal and sometimes positive changes in the intrinsic quality parameters The effect of supercritical carbon dioxide technology (SCCD, 140, 160, and 180 bar at 35 ? 2 ?C for 10 min) on whey-grape juice drink characteristics was investigated. Physicochemical characterization (pH, titratable acidity, total soluble solids), bioactive compounds ( phenolic compunds, anthocyanins , DPPH and ACE activity) and the volatile compounds were performed. Absence of differences were found among treatments for pH, titratable acidity, soluble solids, total anthocyanins and DPPH activity (p>0.05). A direct relationship between SCCD pressure and ACE inhibitory activity was observed, with 34.63, 38.75, and 44.31% (140, 160, and 180 bar, respectively). Regards the volatile compounds, it was noted few differences except by the presence of ketones. The findings confirm the SCCD processing as a potential promising technology to the conventional thermal treatment. The use of supercritical technology as a non-thermal pasteurization process of the whey-grape juice drink was investigated in this study. The effects of supercritical carbon dioxide at 14, 16, and 18 MPa (35 ? 2?C/10 min) on the physical and sensory properties of the beverage, when compared to conventional pasteurization (heat treatment at 72?C/15 s) were evaluated. High-pressure CO2 processing of whey-grape juice drink resulted in a product with lower particle diameter, lower consistency index, and a reduction in pseudoplastic character when compared to the beverage treated by the conventional process. No effect of high-pressure CO2 was observed on the sensory attributes of the beverage for the levels studied. Consumers did not find differences between the CO2-treated and heat-treated beverages. Our findings suggest the use of supercritical technology with carbon dioxide as an effective alternative for the production and availability of a health and wellness promoting beverage / A tecnologia emergente de di?xido de carbono supercr?tico (DCSC) vem sendo estudada como agente pasteuriza??o a frio, no entanto, s?o poucos os estudos dispon?veis a cerca da sua efici?ncia em derivados l?cteos. Neste estudo, foram investigados os efeitos do processamento do DCSC por diferentes press?es 14, 16 e 18 MPa (35 ? 2 ?C / 10 min) no whey drink de uva, bebida a base de soro de leite e suco de uva, em compara??o ? pasteuriza??o convencional (tratamento t?rmico a 72 ?C / 15 s). Foram realizadas an?lises f?sico-quimicas de pH, acidez titul?vel, s?lidos sol?veis totais, compostos fen?licos, antocianinas, atividade antioxidante, atividade inibidora da enzima conversora de angiotensina (ECA) e compostos vol?teis. Tamb?m foramam alisados a cor, o tamanho de part?cula, reologia, estabilidade f?sica, assim como a qualidade microbiol?gica e analise sensorial das bebidas. Os resultados deste estudo evidenciaram a aus?ncia de diferen?as entre os tratamentos nas an?lises de pH, acidez titul?vel, s?lidos sol?veis, antocianinas totais e atividade de DPPH (p> 0,05). Foi observada uma rela??o direta entre press?o DCSC e atividade inibit?ria ACE, com 34,63, 38,75 e 44,31% (14, 16 e 18 MPa, respectivamente). Poucas diferen?as foram encontratdas no perfil dos compostos vol?teis. O processamento das bebidas por DCSC resultou em um produto com menor di?metro de part?cula, menor ?ndice de consist?ncia e uma redu??o no car?ter pseudopl?stico em compara??o com a bebida tratada pelo processo convencional. N?o foi observado efeito de CO2 de alta press?o nos atributos sensoriais da bebida para os n?veis estudados. Os consumidores n?o encontraram diferen?as entre as bebidas tratadas com CO2 e as bebidas tratadas termicamente. Os resultados confirmam o processamento do DCSC como uma tecnologia promissora para o tratamento n?o t?rmico de whey drink de uva disponibilizado uma bebida promotora de sa?de e bem-estar Antecedentes: Os processamentos de alimentos n?o t?rmicos s?o configurados como uma alternativa interessante para a ind?stria de alimentos devido ao aumento da reten??o de nutrientes e mudan?as sensoriais m?nimas nos produtos processados. ?mbito e abordagem: o objetivo desta revis?o ? abordar o potencial da tecnologia de di?xido de carbono supercr?tico, enfatizando o processamento de leite e l?cteos, incluindo os aspectos hist?ricos, as principais vantagens, os mecanismos de inativa??o microbiana, bem como os efeitos em alguns par?metros de qualidade dos produtos l?cteos. Principais conclus?es e conclus?es: o uso de tecnologia supercr?tica de di?xido de carbono (SC-CO2) apresenta grande potencial de aplica??o no processamento de l?cteos, uma vez que ? efetivo reduzir a carga microbiana quando comparado ao processo de pasteuriza??o, obtendo-se assim um produto com maior prateleira e melhores propriedades sensoriais com mudan?as m?nimas e ?s vezes positivas nos par?metros de qualidade intr?nseca. O efeito da tecnologia de di?xido de carbono supercr?tico (SCCD, 140, 160 e 180 bar a 35 ? 2 ?C durante 10 min) em caracter?sticas de bebidas de suco de uva foi investigado. Caracteriza??o f?sico-qu?mica (pH, acidez titul?vel, s?lidos sol?veis totais), compostos bioativos (compostos fen?licos, antocianinas, DPPH e atividade ACE) e os compostos vol?teis foram realizados. A aus?ncia de diferen?as foi encontrada entre tratamentos para pH, acidez titul?vel, s?lidos sol?veis, antocianinas totais e atividade de DPPH (p> 0,05). Foi observada uma rela??o direta entre press?o SCCD e atividade inibit?ria ACE, com 34,63, 38,75 e 44,31% (140, 160 e 180 bar, respectivamente). Atende aos compostos vol?teis, observou-se poucas diferen?as, exceto pela presen?a de cetonas. Os resultados confirmam o processamento do SCCD como uma potencial tecnologia promissora para o tratamento t?rmico convencional O uso da tecnologia supercr?tica como processo de pasteuriza??o a frio da bebida de suco de uva e soro de uva foi investigado neste estudo. Os efeitos do di?xido de carbono supercr?tico em 14, 16 e 18 MPa (35 ? 2 ?C / 10 min) nas propriedades f?sicas e sensoriais da bebida, quando comparados ? pasteuriza??o convencional (tratamento t?rmico a 72 ?C / 15 s) Foram avaliados. O processamento de CO2 de alta press?o da bebida de suco de soro de soro de leite resultou em um produto com menor di?metro de part?cula, menor ?ndice de consist?ncia e uma redu??o no car?ter pseudopl?stico em compara??o com a bebida tratada pelo processo convencional. N?o foi observado efeito de CO2 de alta press?o nos atributos sensoriais da bebida para os n?veis estudados. Os consumidores n?o encontraram diferen?as entre as bebidas tratadas com CO2 e as bebidas tratadas termicamente. Nossas descobertas sugerem o uso da tecnologia supercr?tica com di?xido de carbono como uma alternativa efetiva para a produ??o e disponibilidade de uma bebida promotora de sa?de e bem-estar

Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-07-03T13:27:49Z No. of bitstreams: 1 DIS_FELIPE_GOULART_TOMKOWSKI_COMPLETO.pdf: 661319 bytes, checksum: 652d7011baedb676606b1b58f3f86c31 (MD5) / Made available in DSpace on 2017-07-03T13:27:49Z (GMT). No. of bitstreams: 1 DIS_FELIPE_GOULART_TOMKOWSKI_COMPLETO.pdf: 661319 bytes, checksum: 652d7011baedb676606b1b58f3f86c31 (MD5) Previous issue date: 2017-03-30 / A presente disserta??o tem por objetivo investigar o valor instrumental do comportamento humano para o funcionamento da democracia atrav?s da ideia de raz?o p?blica. A intera??o que existe entre governo e cidad?os ? determinante para que as pol?ticas p?blicas de um pa?s sejam condizentes com as prefer?ncias da popula??o e n?o de grupos de poder. Sendo assim, torna-se importante analisar a ideia subjacente ? democracia de "governo pela discuss?o" ? luz de teorias que nos iluminem tanto no que diz respeito ? ideia de decis?o coletiva justa, quanto, ao real comportamento humano. Para tal, primeiramente ? apresentada a ideia de raz?o p?blica a contraponto, em particular, as vis?es de Rawls e Sen, dando ?nfase para ao conceito de imparcialidade nas decis?es pol?ticas. Em seguida, na terceira se??o, trabalham-se as ideais de racionalidade, razoabilidade, introduzindo-se os conceitos de heur?sticas, vieses, e valores sociais. Assim, constr?i-se uma associa??o para se pensar sobre os resultados de diferentes tipos de comportamento humano para a democracia e como ? poss?vel refletir a partir dele sobre as ideias de objetividade posicional e transcendental. Finalmente, na se??o IV, realiza-se uma investiga??o emp?rica atrav?s da base de sobre a rela??o entre percep??es sobre informa??es e disposi??es pol?ticas e a frequ?ncia de conversa sobre pol?tica com os amigos. Utiliza-se um modelo de regress?o log?stica ordenada, com dados do Latino Bar?metro de 2015 para o Brasil, aliado ao m?todo de componentes principais para capturar dimens?es explicativas relevantes. Os seguintes resultados obtidos contradizem as hip?teses pr?vias: a falta de confian?a no governo e a percep??o de garantias faltantes n?o significativos, o ativismo dissociado a causas espec?ficas reduz, ao passo que, um senso de cidadania ao reverso aumenta as chances de se conversar sobre pol?tica com mais frequ?ncia com amigos. / The present dissertation aims to investigate the instrumental role of human behaviour for democracy through the idea of public reason. The interaction between government and citizens is decisive for a country's public policies to be in line with population preferences rather than power groups. Thus, it becomes important to analyse the idea underlying democracy of "government by discussion" in the light of theories that enlighten us both with regard to the idea of just collective decision and real human behaviour. To this end, we first counterpoint the idea of public reason, in particular, of Rawls and Sen, with an emphasis on the concept of impartiality in political decisions. Then, in the third section, we work on the notions of rationality, reasonableness, introducing the concepts of heuristics, biases, and social values. Thus, an association is constructed for thinking about the results of different types of human behavior for democracy and how the ideas of positional and transcendental objectivity fit this purpose well. Finally, in section IV, we conduct an empirical investigation based on the relationship between perceptions of relevant political information and dispositions and the frequency of political talk with friends. We use a logistic regression model, with data from the 2015 Latin Barometer for Brazil, combined with principal components method to capture relevant explanatory dimensions. The following results contradict previous hypotheses: lack of trust in the government and the perception of absent guarantees are not significant, while activism dissociated of specific causes reduces and a reverse sense of citizenship increases the chances of talking about politics more frequently with friends.

Submitted by PPG Ci?ncias Criminais (ppgccrim@pucrs.br) on 2017-10-31T12:02:31Z No. of bitstreams: 1 Disserta??o de Mestrado - Samuel Sganzerla.pdf: 1045063 bytes, checksum: d7515d1c0029163bd6d9dabb3d4fb7c3 (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-11-10T12:16:03Z (GMT) No. of bitstreams: 1 Disserta??o de Mestrado - Samuel Sganzerla.pdf: 1045063 bytes, checksum: d7515d1c0029163bd6d9dabb3d4fb7c3 (MD5) / Made available in DSpace on 2017-11-10T12:16:26Z (GMT). No. of bitstreams: 1 Disserta??o de Mestrado - Samuel Sganzerla.pdf: 1045063 bytes, checksum: d7515d1c0029163bd6d9dabb3d4fb7c3 (MD5) Previous issue date: 2017-08-28 / The present dissertation proposes to examine the crime of electoral corruption from the perspective of crime as an offense to legal interests. In order to do so, the study turns, in the first instance, to the aspects pertinent to the concepts of legal interest and offensiveness, in order to delimit the panorama on which the examination in the specific question unfolds. Subsequently, it works on the constitutional and material foundations of political rights and electoral law in our legal system, especially regarding the rule of law, democracy, democratic principle, suffrage, popular sovereignty, citizenship, since they are essential to understand the legal interests protected by such institutes and, from then on, the nature of the crime of electoral corruption and its object of criminal protection. Finally, a more specific analysis is made of the selected crime, with the purpose of discussing its dogmatic basis and of identifying the criminal-legal interest(s) protected by the standard and the televance of the concept of offensiveness on the species. / A presente disserta??o se prop?e a examinar do delito de corrup??o eleitoral a partir da perspectiva do crime como ofensa a bens jur?dicos. Para tanto, o estudo se volta, num primeiro momento, aos aspectos pertinentes aos conceitos de bem jur?dico e de ofensividade, a fim de delimitar o panorama sobre o qual se desdobra o exame na quest?o espec?fica. Posteriormente, trabalha-se acerca dos fundamentos constitucionais e materiais dos direitos pol?ticos e do direito eleitoral em nosso ordenamento jur?dico, especialmente no que atinente a Estado de Direito, democracia, princ?pio democr?tico, sufr?gio, soberania popular, cidadania, uma vez que imprescind?veis para compreender os bens jur?dicos tutelados por tais institutos e, a partir de ent?o, a natureza do crime de corrup??o eleitoral e seu objeto de tutela penal. Por ?ltimo, analisa-se de forma mais espec?fica o delito selecionado, com as finalidades de discorrer acerca de sua base dogm?tica e de identificar o(s) bem(ns) jur?dico-penal(is) protegido(s) pela norma tipificada e da relev?ncia do conceito de ofensividade na esp?cie.

Submitted by PPG Engenharia e Tecnologia de Materiais (engenharia.pg.materiais@pucrs.br) on 2018-05-03T11:34:42Z No. of bitstreams: 1 disserta??o Roger vers?o biblioteca.pdf: 9741593 bytes, checksum: 510807346e33704b6f1650648b1f1b19 (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-05-14T11:17:02Z (GMT) No. of bitstreams: 1 disserta??o Roger vers?o biblioteca.pdf: 9741593 bytes, checksum: 510807346e33704b6f1650648b1f1b19 (MD5) / Made available in DSpace on 2018-05-14T11:48:12Z (GMT). No. of bitstreams: 1 disserta??o Roger vers?o biblioteca.pdf: 9741593 bytes, checksum: 510807346e33704b6f1650648b1f1b19 (MD5) Previous issue date: 2018-01-15 / Developing technologies for the capture and geological storage of CO2 has been a constant challenge of the scientific community in the search for solutions that can reduce the environmental impacts caused by the release of this gas into the atmosphere. However, its storage in depleted oil wells has been shown to be a very important point, since the materials applied in wells can suffer degradation in the presence of CO2 in the supercritical state and at high pressures. The objective of this work is to evaluate the performance of the class G cement paste used in cementation of wellbore under conditions of geological carbon storage with replacement of part of the cement by pozoanic materials such as fly ash from the fossil fuel burning of the Candiota Thermoelectric Plant, and synthetic zeolites (4A-1 e 4A-2). The contents of the pozalanas used in substitution of the cement were 5% and 10% in weight. The medium in which samples were submitted for degradation tests was CO2 saturated water at 15 MPa pressure and 90 ?C for 7 and 14 days. Scanning Electron Microscopy (SEM), XRay Diffraction (XRD) and compressive strength tests were the characterization techniques used in this work. The results showed that the use of fly ash increased the compressive strength of the samples after 14 days, mainly for higher percentage of cement replacement by this material (10%), but its chemical degraded layer increased. In case of zeolites 4A-1 use, a lower compressive strength was observed compared to the standard paste, but the degraded layer was reduced. When zeolites 4A-2 were used significant loss of compressive strength was observed from 7 to 14 days, mainly for the proportion of the mixture of 10% and its degraded layer also reduced. / Desenvolver tecnologias para a captura e armazenamento geol?gico de CO2 tem sido um desafio constante da comunidade cient?fica na busca de solu??es que possam reduzir os impactos ambientais provocados pela libera??o desde g?s na atmosfera. Por?m, seu armazenamento em po?os depletados de petr?leo tem se mostrado o ponto mais desafiador, pois os materiais aplicados nestes po?os podem sofrer degrada??o na presen?a de CO2 em estado supercr?tico e em altas press?es. Este trabalho tem como objetivo avaliar o desempenho da pasta de cimento classe G, utilizada na cimenta??o e tamponamento dos po?os, em condi??es de armazenamento geol?gico de carbono com substitui??o de parte do cimento por materiais pozol?nicos. O material utilizado foi as cinzas volantes, oriundas da queima de carv?o mineral da Usina Termoel?trica de Candiota, e ze?litas 4A comerciais sint?ticas (4A-1 e 4A-2). Os teores utilizados das pozalanas em substitui??o ao cimento foram 5% e 10% em massa. O meio em que foram submetidas as amostras foi de ?gua saturada com CO2 a 15 MPa de press?o a 90? C por 7 e 14 dias. A Microscopia Eletr?nica de Varredura (MEV), a Difra??o de Raios X (DRX) e o teste de resist?ncia ? compress?o foram as t?cnicas de caracteriza??o utilizadas neste trabalho. Os resultados obtidos mostram que o uso de cinzas volantes aumentou aos 14 dias a resist?ncia ? compress?o das amostras, principalmente para maior a porcentagem de substitui??o do cimento por este material (10%), por?m a camada alterada quimicamente aumentou. Quando utilizadas as ze?litas 4A-1, notou-se uma menor resist?ncia ? compress?o que a pasta padr?o, mas a camada degradada reduziu. No caso das ze?litas 4A-2, foi constatada a perda significativa de resist?ncia ? compress?o dos 7 para 14 dias, principalmente para a amostra contendo 10% dessa zeolita, sendo que a camada alterada quimicamente tamb?m reduziu.

Submitted by Jadson Francisco de Jesus SILVA (jadson@uefs.br) on 2017-01-26T23:24:02Z No. of bitstreams: 1 Aldrin_ Vers?o Final Impress?o.pdf: 7435625 bytes, checksum: fe41963e4b286813dd60b77e64b9e6c8 (MD5) / Made available in DSpace on 2017-01-26T23:24:02Z (GMT). No. of bitstreams: 1 Aldrin_ Vers?o Final Impress?o.pdf: 7435625 bytes, checksum: fe41963e4b286813dd60b77e64b9e6c8 (MD5) Previous issue date: 2016-09-22 / This essay presentes the results of some research, which has the object of studying an indigenous teacher and his discursive perspective about the didactic book of history it was atmed at identifying more specifically how this teacher brings into pieces the representations of the indian in the didactic book of history. The authors of this text were four teachers who have been teaching or taught the subject of history at the Indigendus School of Patax? Coroa Vermelha ? Red Crown located in the country of Santa Cruz de Cabr?lia in the south of Bahia. Having the accomplishment of this investigation done in this aforementioned school was necessary to obtain the altogether authorization as the followed: from the chief of the village Coroa Vermelha Red Crown, from the direction of the body of teachers who was investigated, from National Foundation of Indian (FUNAI) as well as the Committee of Ethics and Research Involved with Humanbeings (CEP), from the University of the State of Feira de Santana (UEFS). This piece of research is about the representation of the Indians cantained in the didactic book of History also contemplating the specifications of the book of the grade school witch was adapted by the school among others indicated by the government. Besides, the analysis of texts and the images presented in one of the chapters mentioned in the book which particularly deals with the indigenous peoples. This piece of reseach was of qualitative nature and having the interview semistructered as the main instruments of collecting the data, furthermore the verbal texts and imagery presented in the didactic book. The data were analyzed from the theoreticalmethodological perspective of the analysis of the images it was verified that although the chapter of the book analyzed and used by the teachers in their work the material brings along some advancements in relation to the thematic of the book contains images and verbal texts with stereotyped representations about the Indians. We could find the indigenous teachers put together in a critical way the representations and verbal speeches and imagery contained in the didactic book among many factors in themselves. We quote: the preservation of their traditions costums and cultural in heritance, the use of specific didactic materials from their culture and the technological Resources available in the school due to continued academic background as well as the knowledge of specific legislation aiming at education of the Indians among others. The indian peoples acquire each day more knowledge about their rights and personalized education and education also surpasses the planning of specific and didactic books whest quality fits the maximum of the culture of the indigenous peoples. This piece of research contributes to rethink the distortions that are still present in the didactic book of history related to the images and verbal texts about the Indians considered in its most important aspects the discursive perspective of the indigenous teachers in the context of the school of Patax?. This points out the necessity of re evaluating the didactic books produced with the participation or even the striking direction of the Indians taking into account the view of the diversity of specificity and the rich variety of the culture of indigenous peoples of patax?. / Esta disserta??o tem como objeto de estudo o ?ndio no livro did?tico de hist?ria e a (des)constru??o de representa??es pelo professor ind?gena patax?. A an?lise transitou entre os textos verbais e imag?ticos do cap?tulo espec?fico do livro did?tico de hist?ria que trata da tem?tica ind?gena e o discurso de quatro professores patax? que lecionam ou lecionaram a disciplina Hist?ria na escola ind?gena Patax? Coroa Vermelha, localizada no munic?pio de Santa Cruz Cabr?lia, no extremo sul da Bahia. Para a realiza??o desta investiga??o na referida escola, foi necess?rio obter um conjunto de autoriza??es, a saber: do Cacique da aldeia Coroa Vermelha, da dire??o, do corpo docente a ser investigado, da Funda??o Nacional do ?ndio (FUNAI), bem como do Comit? de ?tica em Pesquisa Envolvendo Seres Humanos (CEP), da Universidade Estadual de Feira de Santana (UEFS). A pesquisa foi de natureza qualitativa, tendo a entrevista semiestruturada como instrumento principal para a coleta dos dados, al?m dos textos verbais e imag?ticos presentes no livro did?tico. Os dados foram analisados a partir da perspectiva te?rico-metodol?gica da An?lise de Discurso de Linha Francesa e da An?lise da Imagem. Verificou-se que embora o cap?tulo analisado do livro trabalhado pelos professores traga alguns avan?os em rela??o ? tem?tica ind?gena, de forma geral, ainda cont?m, nas imagens e textos verbais, representa??es estereotipadas sobre os ?ndios. Podemos constatar que os professores ind?genas desconstroem, de forma cr?tica, as representa??es e discursos verbais e imag?ticos contidos no livro did?tico, por conta de v?rios fatores, dentre eles: a preserva??o de suas tradi??es; costumes e riqueza cultural; o uso de materiais did?ticos espec?ficos de sua cultura e dos recursos tecnol?gicos dispon?veis na escola; devido ? forma??o acad?mica continuada, bem como o conhecimento da legisla??o espec?fica para educa??o ind?gena. Os povos ind?genas adquirem, cada vez mais, conhecimento a respeito dos seus direitos sobre a educa??o diferenciada e esta educa??o perpassa tamb?m pela constru??o de livros did?ticos espec?ficos e de qualidade que se adequem, ao m?ximo, ?s culturas dos povos ind?genas. A pesquisa contribui para repensar as distor??es ainda presentes no livro did?tico de Hist?ria no que se refere ? imagens e textos verbais sobre os ?ndios, considerando, de forma primordial, a perspectiva discursiva de professores ind?genas no contexto da escola Patax?. Isto sinaliza a necessidade de que os livros did?ticos sejam reavaliados e produzidos com a participa??o ou mesmo a dire??o contundente dos ?ndios, tendo em vista contemplar a diversidade, riqueza e especificidades das culturas ind?genas.

Submitted by Verena Pereira (verenagoncalves@uefs.br) on 2018-11-14T22:49:02Z No. of bitstreams: 1 Disserta??o de Jadiane(C).pdf: 1600835 bytes, checksum: 6b3162236247731029b8ced5d94cc873 (MD5) / Made available in DSpace on 2018-11-14T22:49:02Z (GMT). No. of bitstreams: 1 Disserta??o de Jadiane(C).pdf: 1600835 bytes, checksum: 6b3162236247731029b8ced5d94cc873 (MD5) Previous issue date: 2018-07-07 / Earth's operational orbiting satellites are very useful for space science because it has great features as these services enable research and space explorations for scientific, commercial, and military interests as well. However, the increasing flow of space activities has increased the amount of debris orbiting in the operating regions, thereby increasing the chances of collisions in those areas, and allowing immeasurable damages if the satellite remains in this collision orbit. In view of the large number of operational objects, the study of evasive maneuvers for space vehicles has been growing, and this one is important in face of the possibility of collisions, not only with a single debris but with clouds of space debris. The objective of the evasive maneuver is to avoid collision, but by keeping the vehicle in its orbit nominally. The history of the phenomenon, that is, how it evolves over time, is found when the differential equation that represents the phenomenon is solved. From the point of view of Physics and Mathematics, the more realistic the model, the more difficult is the solution of the differential equations representing the phenomenon. Thus, this work seeks to present the analytical and semi-analytical solutions for the equations describing the relative dynamics between two bodies subjected to gravitational force, Chohessy-Wiltshire equations, under the influence of forces: gravitational, atmospheric drag, chemical propulsion ( exponential model and linear model), atmospheric drag plus chemical propulsion and plasma propulsion, and finally present their respective computational simulations. These simulations made it possible to show what happens to the operational satellites against a collision, for each specified model. With the contribution of the development of the atmospheric drag equation, with the drag coefficient varying / Os sat?lites operacionais em ?rbita da Terra s?o muito ?teis para a Ci?ncia Espacial, pois possuem grandes aplica??es e fun??es. Seus servi?os possibilitam pesquisas e explora??es espaciais para interesses cient?ficos, comerciais e tamb?m militares. Por?m, o crescente fluxo das atividades espaciais tem elevado a quantidade de detritos orbitando nas regi?es operacionais e, desse modo, aumentando as chances de colis?es nessas ?reas, e possibilitando imensur?veis preju?zos, caso o sat?lite permane?a nessa ?rbita de colis?o. Diante da grande quantidade de objetos operacionais e n?o operacionais, o estudo de manobras evasivas para os ve?culos espaciais torna-se urgente e necess?rio, visto a possibilidade de colis?es, n?o s? com um ?nico detrito, mas com nuvens de detritos espaciais. O objetivo da manobra evasiva ? evitar a colis?o, mas, mantendo o ve?culo em sua ?rbita nominal. A hist?ria do fen?meno, ou seja, como ele evolui no tempo, ? encontrada quando a equa??o diferencial que o representa ? resolvida. Assim obtemos a posi??o relativa entre os objetos colisionais no tempo. Do ponto de vista da F?sica e da Matem?tica, quanto mais realista for o modelo, mais dif?cil ser? a solu??o das equa??es diferenciais representantes do fen?meno. Assim, este trabalho busca apresentar as solu??es anal?ticas e semi-anal?tica para as equa??es que descrevem a din?mica relativa entre dois corpos sob a atua??o das for?as: gravitacional, de arrasto atmosf?rico, propuls?o qu?mica (modelo exponencial e modelo linear) e propuls?o plasma. Por fim, busca apresentar suas respectivas simula??es computacionais. Estas simula??es possibilitaram mostrar o que acontece com os sat?lites operacionais frente ? uma colis?o, para cada um modelo especificado. Outra contribui??o deste trabalho ? solu??o semi-anal?tica da din?mica relativa com arrasto atmosf?rico para densidade atmosf?rica n?o constante