Conte?do parcial / Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T13:13:18Z No. of bitstreams: 2 edimilson_alves_barbosa.pdf: 170936 bytes, checksum: 06292818e7702f0384d1eba33a864347 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T13:14:28Z (GMT) No. of bitstreams: 2 edimilson_alves_barbosa.pdf: 170936 bytes, checksum: 06292818e7702f0384d1eba33a864347 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T13:14:54Z (GMT) No. of bitstreams: 2 edimilson_alves_barbosa.pdf: 170936 bytes, checksum: 06292818e7702f0384d1eba33a864347 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-22T13:14:54Z (GMT). No. of bitstreams: 2 edimilson_alves_barbosa.pdf: 170936 bytes, checksum: 06292818e7702f0384d1eba33a864347 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Objetivou-se com esse trabalho avaliar o os efeitos das vias de absor??o de subdoses de glyphosate no crescimento e na nutri??o de plantas jovens de caf?. Para isso,plantas de caf? foram cultivadas em solu??o hidrop?nica durante 50 dias ap?s a aplica??o (DAA) do herbicida. O trabalho foi conduzido no delineamento em blocos casualizados (DBC), com esquema fatorial 2x4 sendo o primeiro fator referente ? via de absor??o foliar e radicular e o segundo ? avalia??odo efeito das doses de glyphosate utilizadas: 0; 115,2; 230,4; e 460,8 g ha-1 correspondentes a 0; 8; 16 e 32 % da dose de 1440 g ha-1 da formula??o sal de isopropilamina, com 7 repeti??es. Os sintomas de intoxica??o foram caracterizados por clorose e estreitamento do limbo foliar e atingiram 50e 70% para a absor??o radicular e foliar, respectivamente. Com o aumento das doses do herbicida at? 460,8 g ha-1 ocorreram redu??es do comprimento do caule, do n?mero de folhas, da ?rea foliar, da raz?o de massa foliar, da rela??o parte a?rea raiz, do comprimento das ra?zes e das massas seca das folhas, do caule, das ra?zes e total. O n?mero de folhas; ?rea foliar; massa seca da raiz, caule, folha e total e a raz?o de massa foliar foram menores quando o herbicida foi absorvido pelas folhas. As vias de absor??o e as subdoses de glyphosate n?o alteraram o comportamento do K na planta, mas prejudicaram o desempenho do N, P, Ca e Mg, sendo todos os efeitos mais acentuados quando o herbicida foi absorvido pela parte a?rea em rela??o ? absor??o radicular.Conclui-se que as vias de absor??o e as subdoses de glyphosate n?o interferem no desempenho do K em plantas jovens de caf? em condi??es hidrop?nicas, mas comprometem o comportamento do N, P, Ca e Mg, reduzindo o crescimento dessas plantas. A absor??o e ou transloca??o do glyphosate ? mais eficiente quando absorvido via foliar. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT The objective of this work was to evaluate the effects of absorption pathways of reduced rates of glyphosate on growth and nutrition of young coffee plants. For this, coffee plants were grown in hydroponic solution for 50 days after application (DAA) of the herbicide. The study was conducted in a randomized block design (RBD) with a 2x4 factorial design with the first factor related to the route of foliar and root absorption and the second to Assessmentmethodology effect of glyphosate doses used: 0, 115.2, 230.4; and 460.8 g ha-1 corresponding to 0, 8, 16 and 32% of the dose of 1440 g ha-1 isopropylamine salt formulation with 7 replicates. Symptoms of poisoning were characterized by chlorosis and narrowing of the leaf blade 50 and reached 70% for foliar and root uptake, respectively. With increasing rates of the herbicide to 460.8 g ha-1 occurred reductions in stem length, leaf number, leaf area, the leaf mass ratio, the root shoot ratio, the length of roots and masses dried leaves, stem, roots and all. The number of leaves, leaf area, dry weight of root, stem, leaf, every and leaf weight ratio were lower when the herbicide was absorbed by the leaves. Absorption pathways and reduced rates of glyphosate did not alter the behavior of K in the plant, but impaired performance of N, P, Ca and Mg, with all the effects more pronounced when the herbicide was absorbed by the air in relation to root uptake. Conclude that the process of absorption and reduced rates of glyphosate not interfere with the performance of the K young coffee in hydroponic conditions, but compromise the behavior of N, P, Ca, Mg, reducing the growth of these plants. The uptake or translocation of glyphosate and is most effective when absorbed through the leaves.

Made available in DSpace on 2014-12-17T15:01:19Z (GMT). No. of bitstreams: 1 LuizFSF.pdf: 1747527 bytes, checksum: e75c5e8a2575620cc3a29490253bcad6 (MD5) Previous issue date: 2009-03-05 / Natural gas, although basically composed by light hydrocarbons, also presents in its composition gaseous contaminants such as CO2 (carbon dioxide) and H2S (hydrogen sulfide). Hydrogen sulfide, which commonly occurs in oil and gas exploration and production activities, besides being among the gases that are responsible by the acid rain and greenhouse effect, can also cause serious harm to health, leading even to death, and damages to oil and natural gas pipelines. Therefore, the removal of hydrogen sulfide will significantly reduce operational costs and will result in oil with best quality to be sent to refinery, thereby resulting in economical, environmental, and social benefits. These factors highlight the need for the development and improvement of hydrogen sulfide sequestrating agents to be used in the oil industry. Nowadays there are several procedures for hydrogen sulfide removal from natural gas used by the petroleum industry. However, they produce derivatives of amines that are harmful to the distillation towers, form insoluble precipitates that cause pipe clogging and produce wastes of high environmental impact. Therefore, the obtaining of a stable system, in inorganic or organic reaction media, that is able to remove hydrogen sulfide without forming by-products that affect the quality and costs of natural gas processing, transport and distribution is of great importance. In this context, the evaluation of the kinetics of H2S removal is a valuable procedure for the treatment of natural gas and disposal of the byproducts generated by the process. This evaluation was made in an absorption column packed with Raschig ring, where natural gas with H2S passes through a stagnant solution, being the contaminant absorbed by it. The content of H2S in natural gas in column output was monitored by an H2S analyzer. The comparison between the obtained curves and the study of the involved reactions have not only allowed to determine the efficiency and mass transfer controlling step of the involved processes but also make possible to effect a more detailed kinetic study and evaluate the commercial potential of each reagent / O g?s natural, embora seja composto basicamente de hidrocarbonetos leves, apresenta tamb?m em sua composi??o gases contaminantes como o CO2 (Di?xido de carbono) e o H2S (Sulfeto de hidrog?nio). O H2S, que comumente ocorre nas atividades de explora??o e produ??o de ?leo e g?s, al?m de estar entre os respons?veis pela chuva ?cida e pelo efeitoestufa, causa s?rios danos ? sa?de, levando inclusive ? morte, e danifica as tubula??es de transporte do petr?leo e do g?s natural. Por isso, eliminando-se o g?s sulf?drico haver? significativa redu??o dos custos de opera??o e uma melhor qualidade do ?leo destinado ? refinaria, resultando assim num beneficio econ?mico, ambiental e social. Tudo isso demonstra a necessidade do desenvolvimento e aprimoramento de seq?estrantes que removam o sulfeto de hidrog?nio da ind?stria de petr?leo. Atualmente existem v?rios processos para o tratamento do g?s natural utilizados pela ind?stria petrol?fera para remo??o do H2S, no entanto eles produzem derivados de aminas prejudiciais ?s torres de destila??o, precipitados insol?veis que provocam entupimento dos dutos e originam res?duos de grande impacto ambiental. Por isso, a obten??o de um sistema est?vel em meio reacional inorg?nico ou org?nico capaz de remover o g?s sulf?drico sem formar subprodutos que afetem a qualidade e o custo do processamento, transporte e distribui??o do g?s natural ? de grande import?ncia. Nesse contexto a avalia??o da cin?tica de remo??o do H2S surge como um procedimento valioso para o tratamento do g?s natural e destino dos subprodutos do processo. Esta avalia??o foi feita numa coluna de absor??o recheada com an?is de Raschig, por onde o g?s natural contaminado com H2S atravessava uma solu??o estagnada, sendo por esta absorvida. Na sa?da da coluna o teor de H2S no g?s era monitorado por um analisador de H2S. A compara??o das curvas obtidas e o estudo das rea??es permitiram n?o somente determinar a efici?ncia e a etapa controladora da transfer?ncia de massa dos processos envolvidos como tamb?m efetuar um estudo cin?tico mais aprofundado e avaliar o potencial comercial de cada reagente

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-01-05T13:42:22Z No. of bitstreams: 2 uidemar_morais_barral.pdf: 1274629 bytes, checksum: d89bbca6115310a0b5ad8323167ba551 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-01-05T18:01:03Z (GMT) No. of bitstreams: 2 uidemar_morais_barral.pdf: 1274629 bytes, checksum: d89bbca6115310a0b5ad8323167ba551 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) / Made available in DSpace on 2016-01-05T18:01:03Z (GMT). No. of bitstreams: 2 uidemar_morais_barral.pdf: 1274629 bytes, checksum: d89bbca6115310a0b5ad8323167ba551 (MD5) license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) Previous issue date: 2015 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / A mat?ria org?nica (MOS) do solo consiste de uma mistura de compostos em v?rios est?gios de decomposi??o, resultante da degrada??o biol?gica de res?duos de plantas e animais, e da atividade de microrganismos, denominados subst?ncias h?micas (SHs). Essas subst?ncias fracionadas em ?cidos f?lvicos (AF), ?cidos h?micos (AH) e humina (H), de acordo com sua solubilidade em meio ?cido ou b?sico. Os AH t?m sido usados como fertilizantes aplicados diretamente no solo ou via foliar, principalmente por influenciarem o metabolismo das plantas. Objetivou-se com este trabalho avaliar em feijoeiro (Phaseolus vulgaris L.), a influ?ncia de fontes e doses diferentes de AH, na produ??o, crescimento radicular e absor??o de nutrientes e biodisponibilidade de nutrientes no solo. O experimento foi conduzido utilizando o delineamento em blocos casualizados com 15 tratamentos, sendo estes as fontes de AH (turfa - 1, composto - 2 e produto comercial - 3) e as doses de AH (0, 2, 8, 16 e 32 kg ha-1), com quatro repeti??es. Foram avaliadas: altura das plantas (cm), di?metro do caule (cm), teor de clorofila (?g cm-2) e teor de macro e micronutrientes nas folhas no florescimento do feijoeiro e ao fim do experimento, peso de sementes (g), massa seca da parte a?rea e de ra?zes (g), n?mero de vagem por planta e de sementes por vagem e no solo: pH em ?gua e teores de mat?ria org?nica, P, K, Ca, Mg, Al e H+Al. A aplica??o de AH reduziu o crescimento e produ??o de gr?o, com aumento das doses em cada fonte, seguindo a ordem fonte 3 > fonte 1 > fonte 2. Os teores de P, K, Cu, Fe, Mn e Zn nas folhas foram influenciados pelas doses de todas as fontes de AH. Houve redu??o para maioria dos nutrientes quantificados nas folhas com aumento das doses de AH. Os teores de P e K se elevaram no solo, com a aplica??o de AH. Para condi??es testadas, n?o se recomenda utiliza??o de AH para cultura do feijoeiro. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2015. / ABSTRACT The soil organic matter (SOM) consists of a mixture of compounds in many decomposition stages, the result of biological degradation of residues of plants and animals, and microorganisms activity, called humic substances (HS). These substances are fractionated into fulvic acids (FA), humic acids (HA) and humin (H), according to their solubility in acidic or basic medium. HA have been used as fertilizers directly applied to the soil or via foliar, mainly because they influence plants metabolism. The main goal of this study was evaluating, in bean plant (Phaseolus vulgaris L.), the influence of sources and different doses of HA in production, root growth, nutrients absorption and bioavailability of nutrients in the soil. The experiment was conducted using randomized block design with 15 treatments, which are the sources of HA (peat ? 1, compound ? 2 and commercial product ? 3) and doses of HA (0, 2, 8, 16 e 32 kg ha-1), with four repetitions. Evaluations were made on: plants height (cm), stem diameter (cm), chlorophyll content (?g cm-2) and content of macro and micronutrients in the leaves in the flowering stages and in the end of the experiment, seeds weight (g), dry matter of the aerial part and roots (g), number of pods per plant and seeds per pod, and in the soil: pH in water and contents of organic matter, P, K, Ca, Mg, Al and H+Al. Application of HA reduced bean growth and production, with increase of doses in each source, following order: source 3 > source 1 > source 2. Contents of P, K, Cu, Fe, Mn and Zn in the leaves were influenced by the doses of all HA sources. Most of the nutrients quantified in the leaves were reduced with increasing HA doses. Contents of P and K were increased in the soil with application of HA. For tested conditions, the use of HA for bean culture is not recommended.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-22T15:28:33Z No. of bitstreams: 1 BoanergesVictorSoaresDeAraujo_DISSERT.pdf: 1038853 bytes, checksum: 6cb9d474725caa33946cdd3023ef86e4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-27T21:26:40Z (GMT) No. of bitstreams: 1 BoanergesVictorSoaresDeAraujo_DISSERT.pdf: 1038853 bytes, checksum: 6cb9d474725caa33946cdd3023ef86e4 (MD5) / Made available in DSpace on 2016-07-27T21:26:40Z (GMT). No. of bitstreams: 1 BoanergesVictorSoaresDeAraujo_DISSERT.pdf: 1038853 bytes, checksum: 6cb9d474725caa33946cdd3023ef86e4 (MD5) Previous issue date: 2015-08-17 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Gases-tra?o s?o importantes para nosso ambiente, mesmo se manifestando apenas em ?tra?os?, mas suas concentra??es devem ser monitoradas, para que quaisquer interven??es necess?rias sejam tomadas a tempo. Condi??es apropriadas para nossas vidas residem dentro de limites inferiores e superiores destes gases, por isso seu monitoramento ? essencial hoje em dia e diversas t?cnicas podem ser usadas para este fim. Uma delas ? a espectroscopia de absor??o ?ptica diferencial (DOAS), que consiste de uma regress?o - o m?todo cl?ssico usa m?nimos quadrados - para determinar a concentra??o dos gases-tra?o. Para melhorar os resultados, diversos estudos buscaram abordagens alternativas. Alguns tentaram pr?-processar o sinal, atrav?s de uma remo??o de ru?do, e.g., usando transformada wavelet discreta (DWT). Este trabalho apresenta um estudo semi-emp?rico para encontrar a DWT com o melhor desempenho para remo??o de ru?do. Dentre diversas fam?lias conhecidas, buscou-se aquelas cuja remo??o de ru?do foram melhor, preservando caracter?sticas principais do sinal original, ent?o com a redu??o do ru?do, o res?duo ap?s a regress?o tamb?m diminui. A an?lise leva em conta o n?vel de decomposi??o wavelet, o limiar aplicado nos coeficientes de detalhe e como aplic?-los - limiariaza??o abrupta ou suave. Os sinais usados prov?m de um banco de dados aberto e online com sinais caracter?sticos de gases-tra?o usualmente estudados. / Trace gases are important to our environment even though their presence comes only by ?traces?, but their concentrations must be monitored, so any necessary interventions can be done at the right time. There are some lower and upper boundaries which produce nice conditions for our lives and then monitoring trace gases comes as an essential task nowadays to be accomplished by many techniques. One of them is the differential optical absorption spectroscopy (DOAS), which consists mathematically on a regression - the classical method uses least-squares - to retrieve the trace gases concentrations. In order to achieve better results, many works have tried out different techniques instead of the classical approach. Some have tried to preprocess the signals to be analyzed by a denoising procedure - e.g. discrete wavelet transform (DWT). This work presents a semi-empirical study to find out the most suitable DWT family to be used in this denoising. The search seeks among many well-known families the one to better remove the noise, keeping the original signal?s main features, then by decreasing the noise, the residual left after the regression is done decreases too. The analysis take account the wavelet decomposition level, the threshold to be applied on the detail coefficients and how to apply them - hard or soft thresholding. The signals used come from an open and online data base which contains characteristic signals from some trace gases usually studied.

Made available in DSpace on 2015-04-14T13:58:27Z (GMT). No. of bitstreams: 1 401642.pdf: 902167 bytes, checksum: cc16a52642c5b08091d85345211b2d0c (MD5) Previous issue date: 2008-03-28 / Muitos s?o os esfor?os de diversos pa?ses em desenvolver tecnologias consideradas limpas para que o impacto ambiental das atividades desenvolvidas seja o menor poss?vel. Neste contexto, o presente trabalho pretende contribuir avaliando a metodologia de captura do di?xido de carbono (CO2) por absor??o qu?mica em usinas t?rmicas a carv?o f?ssil, verificando as potencialidades de aplica??o no Brasil com o objetivo de mitigar as emiss?es antropog?nicas deste g?s, ? um dos respons?veis pelo efeito estufa. Para isto, foi proposta uma metodologia para o c?lculo de emiss?es. Foi realizado um levantamento das potencias ?reas para o seq?estro de CO2, bem como um estudo da t?cnica de captura de CO2 por absor??o qu?mica e das demais t?cnicas. A partir disto verificou-se que os n?veis de poluentes contidos nos gases de combust?o s?o superiores aos indicados para o sistema de captura (SOx ≤ 1ppm; NOx ≤ 20 ppm e cinzas volantes ≤ 15 mg/Nm?). O Brasil possui como ?rea potencial para a realiza??o do seq?estro de CO2 a regi?o sul do estado de Santa Catarina, que possui o maior complexo termel?trico da Am?rica Latina. Este complexo emite cerca de 940 GgC.ano-?, que corresponde a 52% das emiss?es de carbono pela combust?o de carv?o no Brasil. A regi?o possui ?reas potenciais para o armazenamento geol?gico. A t?cnica de captura a ser indicada de acordo com as condi??es de processo das termel?tricas brasileiras ? a absor??o qu?mica, sendo que adapta??es no sistema de combust?o existente ser?o imprescind?veis para a ado??o desta t?cnica

Made available in DSpace on 2016-04-28T14:58:59Z (GMT). No. of bitstreams: 1 2006-Rubens Nei Briacon Busquet.pdf: 998513 bytes, checksum: 2e2a50b0c0141ff91d47dae53e3ba216 (MD5) Previous issue date: 2006-03-28 / This work had the objective of to analyze the development pattern and the nutrient accumulation of four genotypes of banana, with micropropagated plantlets, in the conditions of the State of Rio de Janeiro. An experiment was driven in the Department of Fitotecnia of UFRRJ, in Planossolo, in a randomized blocks design with four treatments and four repetitions of 45 plants for plot, in the spacing of 3x2 m. Four genotypes of the banana were evaluated: Thap Maeo (AAB), FHIA-18 (AAAB), SH3640 (AAAB) and Prata An? (AAB). Only the mother plant was driven per hole, being eliminated the whole sucker. In the first stage, leaves of the four genotypes were sampled eight weeks after transplant (WAT), to determine the correction factor to estimate the leaf area from the length and width of foliar limbo. The angular coefficients of the regression revealed that there are significant differences among genotypes, indicating that in the determination of the leaf area of banana tree by ruler, the factor of correction of 0.79 should be used for cultivar SH 3640, FHIA 18 and Thap Maeo, and 0.83 for Prata An?. The second stage, the temperature and the precipitation arise as the climate factors more related to the rate of leaf emission of the four genotypes.. The genotype Thap Maeo presented larger vegetative cycle (366 days) and total (468 days) and larger plant height (3.0 m) that the other genotypes. The genotypes didn't present differences in the reproductive cycle and in the diameter of plants. The genotype Fhia 18 presented the largest total mass of fruits for plant. The genotype Thap Maeo presented larger medium number of bunches for bunch, the largest of number of fruits for bunch, the largest relationship pulp-peel, however the smallest fruit size. The genotype SH 3640, although presented fruits of greatest weight and size, presented the smallest number of fruits for bunch and the pulp-peel ratio. In the third stage, to quantify the time variation of plant biomass and nutrient accumulation, one plant was sampled per plot on 8 harvests spaced 8 weeks, when the leaf area measured, and the mass and concentrations of N, P, K, Ca, Mg measured in each plant portion. The growth rates and of nutrient accumulation were measured through the functional plant growth analysis. The mass of rhizomes and stems increased up to 48 WAT and stabilized at 56 WAT. The leaf area, and the mass of active leaves and petioles increased up to 40 WAT and stabilizing in the last three harvests. The net assimilation rate increased between 8 and 24 WAT, and declined mainly after 32 SAT. The rates of nutrient accumulation presented the same pattern regarding with the time of maximal accumulation, varying from 30 to 33 WAT. From the total of nutrients accumulated by the banana plant, the bunch exported after fruit harvest 50% of N, 38% of P, 60% of K, 11% of Ca and 14% of Mg. The total amount of nutrient accumulated, in kg per ha, was 54.5 of N, 14.4 of P, 131.5 of K, 62,5 of Ca and 53 of Mg. . / Este trabalho teve como objetivo analisar o padr?o de crescimento e acumula??o de nutrientes e o comportamento fenol?gico de quatro gen?tipos de bananeiras (Musa spp.), com mudas produzidas por micro-propaga??o, nas condi??es do Estado do Rio de Janeiro. Foi conduzido um experimento no Departamento de Fitotecnia da UFRRJ, em Planossolo, em delineamento em blocos ao acaso com quatro tratamentos e quatro repeti??es de 45 plantas por parcela, no espa?amento de 3x2 m. Foram avaliados quatro cultivares de banana: Thap Maeo (AAB), FHIA-18 (AAAB), SH3640 (AAAB) e Prata An? (AAB). Foi conduzida apenas a planta m?e por touceira, eliminando-se a brota??o lateral. Na primeira etapa foi feita a coleta de folhas, com o objetivo de determinar o fator de corre??o para estimar a ?rea foliar a partir do comprimento e largura de limbo foliar. Houve diferen?as significativas entre gen?tipos, indicando que deve-se usar o fator de corre??o de 0,79 para a as cultivares SH3640, FHIA 18 e Thap Maeo, e 0,83 para Prata An?. A segunda etapa teve como objetivo verificar a taxa de lan?amento de folhas de quatro gen?tipos de bananeiras e correlacion?-la com as condi??es clim?ticas e estudar o comportamento fenol?gico dos quatro gen?tipos. A temperatura e a precipita??o apresentaram-se como os fatores de clima mais relacionados ? taxa de emiss?o de folhas pelos quatro gen?tipos. Os gen?tipos apresentaram comportamento diferenciado quanto ? taxa de lan?amento de folhas nos per?odos 8, 32 e 64 SAT, quando o gen?tipo Prata An? apresentou o maior n?mero de folhas lan?adas. O gen?tipo Thap Maeo apresentou maior ciclo vegetativo (366 dias) e total (468 dias) e maior altura de planta que os demais gen?tipos. O gen?tipo Fhia 18 apresentou a maior massa total de frutos por planta. O gen?tipo Thap Maeo apresentou maior n?mero m?dio de pencas e frutos por cacho, a maior rela??o polpa-casca, por?m o menor tamanho de fruto. O gen?tipo Prata An? apresentou o valor mais elevado de s?lidos sol?veis totais. O gen?tipo SH 3640, apresentou o pior desempenho. Na terceira etapa, para quantificar a varia??o temporal de biomassa vegetal e de acumula??o de nutrientes, foram efetuadas 8 coletas espa?adas 8 semanas, quando foi coletada uma planta por parcela, separada em rizoma, limbo foliar, bainha das folhas, pec?olo, enga?o, flores, br?cteas e frutos, e determinando-se a ?rea foliar. No material vegetal obtido em cada coleta foram determinados os teores de N, P, K, Ca, Mg. As taxas de crescimento e de acumula??o de nutrientes foram mensuradas atrav?s do m?todo funcional de an?lise de crescimento vegetal. A massa seca do rizoma e do pseudocaule aumentou significativamente at? 48 SAT, se estabilizando aos 56 SAT. A ?rea foliar, e a massa das folhas ativas e dos pec?olos aumentaram at? 40 SAT, se estabilizando nas tr?s ?ltimas coletas.A ?rea foliar espec?fica reduziu-se ao longo das coletas em todos os gen?tipos, sendo que Fhia 18 apresentou os menores valores e Thap Maeo os maiores valores de ?rea foliar espec?fica. A taxa de assimila??o l?quida aumentou entre 8 SAT e 24 SAT, quando decaiu principalmente a partir de 32 SAT. As taxas de acumula??o absoluta de N, P, K, Ca e Mg apresentaram-se similares quanto a ?poca de m?xima acumula??o, variando de 30 a 33 SAT.. Ap?s a colheita, do total de nutrientes imobilizados pela bananeira, foram exportados para o cacho 50% do N, 38% do P, 60% do K, 11% do Ca e 14% do Mg. O total de nutrientes acumulado, em kg por ha, foi 54,5 de N, 14,4 de P, 131,5 de K, 62,5 de Ca e 53 de Mg.

Submitted by Leticia Schettini (leticia@ufrrj.br) on 2016-08-05T14:09:04Z No. of bitstreams: 1 2002 Jane Ara?jo Baptista.pdf: 1264077 bytes, checksum: 40b93a67e37e2aad7edfc01cc029f2c4 (MD5) / Made available in DSpace on 2016-08-05T14:09:04Z (GMT). No. of bitstreams: 1 2002 Jane Ara?jo Baptista.pdf: 1264077 bytes, checksum: 40b93a67e37e2aad7edfc01cc029f2c4 (MD5) Previous issue date: 2002-03-27 / We have studied the influence of using 6 different coefficients of similarity when grouping 16 varieties of rice analyzed by the RAPD technique. DNA samples of these varieties were amplified using 20 primers, only 15 (75%) of which produced amplified fragments, compresing 90 of these were polimorphic fragments. The analysis of the band, profile produced a ?fingerprint?. For the calculation of the similarity index several coefficients were tested: Nei & Li, Jaccard, Ochiai, Russel & Rao, Simple Matching and Rogers & Tanimoto. Comparison among them was carried out through the evaluation of the dendrograms generated by the UPGMA algorithm and by the correlations between the genetic pitches. The coefficients of Nei & Li, Jaccard, and Ochiai discriminated the varieties in three main groups according to their genetic similarities. Our results show that the coefficients of Nei & Li, Jaccard and Ochiai adjusted better the groups with hight genetic similarities. While the coefficients Simple Matching and Rogers & Tanimoto were not as efficient, banding together varieties that are genetically different. In experiments, with the objective to studies the effect of levels (20 or 60 mg N/L) e forms of N (NH4 + and NO3 -) under the kinetics parameters, proton extrusion, the activity of the N-assimilation enzymes and the N-partition in the plant, were conducted in greenhouse, using 5 upland rice varieties (Lageado, IAC 47, Dobradinho, Agulha e Bico Ganga), in nutrient solution. It was observed an ample variation of the kinetics parameters and biochemists, and a distinguishing behavior among varieties in the uptake and use of N. The varieties Agulha and IAC-47 had presented the best combination of KM, Vm?x, GS/GOGAT in conditions of hight avaibility of N- NO3 -, and Bico Ganga, in conditions of low avaibility of N- NO3 - in nutrient solution. In another experiment, with the objective to study the assimilation and remobiliza??o of N in season nitrate conditions, used varieties Sagrim?o, Goiano, Zebu, Agulha, IAC 1278, IR08, Comum Branco, IAC 47 e Ligeiro had been cultivated in nutritional solution. The N-assimilation enzymes were estudied in the leaf blades and root of 62 and 69 days old rice plants, under 20 and 200 mg mgN-NO3 -/L. Under higher nitrate supply had increase the activity of the NR, GS and GOGAT in rice plants. The GS activities had been low in roots, in comparison with the activities observed in leaf. The GOGAT activity was bigger in roots, in both the treatments. The GDH-A activity occurred mainly in tessues foliar. The GDH-D activity occurred in leaf as in roots. The GDH-D activity not occurred in tissues foliar. The activity of the enzymes of N-assimilation was higher in tissues foliar. These results seem indicate the leaves as the main site of NH4 +-N assimilation in rice plants under higher NO3 --supply. / Neste trabalho avaliaram-se as altera??es provocadas por 6 diferentes coeficientes de similaridade no agrupamento de 16 variedades de arroz analisadas pela t?cnica de RAPD. Amostras de DNA das variedades foram amplificadas com 20 iniciadores, sendo 15 (75%) produziram fragmentos amplificados, resultando em 90 fragmentos polim?rficos. A an?lise dos resultados se constituiu na descri??o do padr?o de bandas. Para o c?lculo do coeficiente de similaridade foram testados os coeficientes Nei & Li, Jaccard, Ochiai, Russel & Rao, Simple Matching e Rogers & Tanimoto, sendo as compara??es entre eles realizadas pela avalia??o dos dendrogramas gerados pelo algoritmo UPGMA e pelas correla??es entre as dist?ncias gen?ticas. Os resultados obtidos indicam que os melhores coeficientes para determina??o da similaridade foram os de Nei & Li, de Jaccard e de Ochiai que foram capazes de agrupar as variedades com alta similaridade, enquanto os coeficientes Simple Matching e de Rogers & Tanimoto foram ligeiramente inferiores colocando variedades distantes no mesmo grupo. Em experimentos objetivando analisar o efeito de n?veis (20 e 60 mg N/L) e formas de N (NH4 + e NO3 -) sob os par?metros cin?ticos de absor??o, a extrus?o de pr?tons, a atividade das enzimas de assimila??o de N, e a parti??o de N na planta, usou-se 5 variedades de arroz-de-sequeiro (Lageado, IAC 47, Dobradinho, Agulha e Bico Ganga), cultivadas em solu??o nutritiva. Houve um comportamento diferencial entre as variedades quanta ? capacidade de absor??o e uso de N. As variedades Agulha e IAC 47 apresentaram a melhor combina??o de KM, Vm?x, GS/GOGAT em condi??es de alta disponibilidade de N-NO3 -, e a variedade Bico Ganga, sob condi??es de baixa disponibilidade de N. Noutro experimento, objetivando estudar a assimila??o e remobiliza??o de N em condi??es sazonais de N, utilizou-se as variedades Sagrim?o, Goiano, Zebu, Agulha, IAC 1278, IR 08, Comum Branco, IAC 25 e Ligeiro, com 62 e 69 dias de idade, cultivadas em solu??o nutritiva, com 20 e 200 mg N-NO3 -/L. O aumento no suprimento de N aumentou a atividade da NR, da GS e GOGAT. A atividade de NR ocorreu em ra?zes e na parte a?rea. A atividade da GS foi baixa em ra?zes. A atividade da GOGAT foi maior nas ra?zes, em ambos os tratamentos. A atividade de GDH-A ocorreu principalmente em tecidos foliares. A atividade de GDHD ocorreu tanto em folhas como em ra?zes. A atividade das enzimas de assimila??o de N foi superior nas folhas, indicando serem estas os principais s?tios de incorpora??o de am?nio em amino?cidos, quando plantas de arroz s?o submetidas a altos n?veis de NO3 -.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-19T13:03:29Z No. of bitstreams: 5 nascilaine.pdf: 1827154 bytes, checksum: b9e52778b31d948210ff6f1f431250cf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-20T09:45:45Z (GMT) No. of bitstreams: 5 nascilaine.pdf: 1827154 bytes, checksum: b9e52778b31d948210ff6f1f431250cf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Made available in DSpace on 2015-02-20T09:45:45Z (GMT). No. of bitstreams: 5 nascilaine.pdf: 1827154 bytes, checksum: b9e52778b31d948210ff6f1f431250cf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) Previous issue date: 2013-02-21 / Na primeira parte do trabalho foi proposto o reconhecimento de padr?es de jabuticaba (Myrciaria jabuticaba (vell) berg (jabuticaba sabar?)) pela avalia??o dos elementos boro, nitrog?nio, magn?sio, f?sforo, pot?ssio, c?lcio, mangan?s, ferro, cobre e zinco na casca empregando-se as t?cnicas de titula??o, espectroscopia de absor??o at?mica e molecular. Os dados obtidos pelas an?lises dos elementos foram dispostos em matriz 7 x 10, sendo sete amostras referente ?s sete cidades analisadas (S?o Jo?o da Chapada, Gouveia, Guinda, Couto de Magalh?es, Po?os de Caldas, Belo Horizonte e Serro) e dez vari?veis correspondendo ?s concentra??es dos elementos determinadas em mgk-1. O reconhecimento de padr?es foi feito empregando-se a An?lise das Componentes Principais e An?lise Hier?rquica por Agrupamentos. Desta forma foi poss?vel identificar pela An?lise das Componentes Principais os grupos formados pela semelhan?a, baseados nos pesos correspondentes ?s influ?ncias das vari?veis. Cerca de cinco componentes principais acumularam 97,47% da vari?ncia total dos dados sendo que a componente principal de n?mero um (01) acumulou cerca de 38,21% da vari?ncia e a componente principal de n?mero tr?s (03) cerca de 16,13% da vari?ncia. Os grupos formados na An?lise das Componentes Principais foram confirmados na An?lise Hier?rquica por Agrupamento, sendo formado quatro grupos, denotando a maior semelhan?a nas amostras de Gouveia e Couto Magalh?es. Na segunda etapa do estudo teve por finalidade classificar e caracterizar quimicamente o refrigerante do tipo guaran?, em diferentes estados brasileiros, foram analisadas suas concentra??es de metais e diferentes compostos atrav?s da absor??o at?mica e espectroscopia de infravermelho respectivamente. Para classificar os refrigerantes dos diversos locais, foi utilizada nos resultados obtidos das an?lises a an?lise explorat?ria baseada em An?lise das Componentes Principais (PCA). A melhor separa??o se deu com as vari?ncias acumuladas na CP2 e CP4, onde as amostras de refrigerantes zero formaram um grupo e amostras coletadas no RJ outro grupo e as amostras de Shim tamb?m formaram um grupo diferente dos demais. Como conclus?o pode-se salientar que os m?todos de reconhecimento de padr?es empregados neste trabalho apresentaram resultados que possibilitam a diferencia??o das amostras em locais distintos. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT In the first part of the proposed pattern recognition Jabuticaba (Myrciaria jabuticaba (vell) berg (jabuticaba sabar?)) for the evaluation of the elements boron, nitrogen, magnesium, phosphorus, potassium, calcium, manganese, iron, copper and zinc on the shell employing the techniques of titration, atomic absorption spectroscopy and molecular. The data obtained by analysis of the elements were arranged in a matrix 10 x 7, seven samples analyzed referring to the seven cities (S?o Jo?o da Chapada, Gouveia, Guinda, Couto de Magalhaes, Wells Caldas, Belo Horizonte and Serro) and ten variables corresponding concentrations of certain elements in MGK-1. Pattern recognition was done using the Analysis of Principal Components Analysis for Hierarchical Groups. This made it possible to identify the Principal Component Analysis groups formed by similarity, based on the weights corresponding to the influences of variables. About five main components accumulated 97.47% of the total variance of the data being the main component of a number (01) accumulated approximately 38.21% of the variance and the principal component number three (03) approximately 16.13% variance. The groups formed in the Principal Component Analysis were confirmed in the Hierarchic Cluster Analysis, formed four groups, indicating a greater similarity in the samples of Gouveia and Couto Magalh?es. In the second stage of the study aimed to classify and characterize chemically the guarana soda type, in different Brazilian states were analyzed in relation to different concentrations of metals and compounds by atomic absorption and infrared spectroscopy respectively. To sort the drinks at different locations, we used the results of the analyzes exploratory analysis based on Principal Component Analysis (PCA). The best separation was accumulated at variance with the CP2 and CP4, where samples of soft drinks have formed a group and zero samples collected at the RJ and the other group samples Shim also formed a different group of demais. Como conclusion can be noted that methods of pattern recognition in this work presented results that allow the differentiation of samples at different locations.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-03T23:57:10Z No. of bitstreams: 1 RicardoAlexDantasDaCunha_DISSERT.pdf: 2552417 bytes, checksum: 6be84ef2bba0ca4028e0191c91836125 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-07T22:17:01Z (GMT) No. of bitstreams: 1 RicardoAlexDantasDaCunha_DISSERT.pdf: 2552417 bytes, checksum: 6be84ef2bba0ca4028e0191c91836125 (MD5) / Made available in DSpace on 2016-06-07T22:17:01Z (GMT). No. of bitstreams: 1 RicardoAlexDantasDaCunha_DISSERT.pdf: 2552417 bytes, checksum: 6be84ef2bba0ca4028e0191c91836125 (MD5) Previous issue date: 2015-12-07 / Os materiais comp?sitos de matriz polim?rica v?m sendo utilizados em larga escala nas ?reas industriais tais como aeroespacial, automobil?stica, petrol?fera, por apresentarem um bom desempenho mec?nico, vida ?til elevada e uma rela??o custo/benef?cio. A determina??o das propriedades mec?nicas se faz indispens?vel para a caracteriza??o dos comp?sitos. Desta forma, neste trabalho ser?o obtidas tr?s placas de laminados com matriz polim?rica teraft?lica, refor?ados por um tecido bidirecional de vidro-E e kevlar, ambos confeccionados industrialmente, onde as placas ser?o fabricadas pelo processo de lamina??o manual (Hand lay up). Todos os laminados ter?o cinco camadas de refor?o,como primeiro laminado h?brido sendo composto pelo tecido bidirecional de fibra de vidro-E, intercalado por camadas de fibra kevlar, o segundo ? formado pelo tecido bidirecional de fibra kevlar nas extremidades do laminado (duas camadas), e no centro o tecido de fibra de vidro (tr?s camadas), a terceira placa foi composta apenas pelo tecido bidirecional de fibra de vidro-E. Em seguida, foram confeccionados corpos de prova (CP) mediante norma, para determina??o das propriedades mec?nicas de tra??o e flex?o em tr?s pontos. Ap?s a fabrica??o dos corpos de prova, estes foram imersos em petr?leo e em ?gua do mar. Feito isso, realizou-se um comparativo das propriedades mec?nicas para a condi??o de ensaio no estado seco. Houve um aumento consider?vel nas propriedades estudadas devido o efeito da hibridiza??o nos laminados. / The polymer matrix composite materials are being used on a large scale in the most different industrial fields such as aerospace, automotive, oil, among others, since the industrial perspectives is currently working with materials which have a good mechanical performance at high service life and cost / benefit. Thus, the determination of the mechanical properties is indispensable for the characterization of waste resulting in greater expansion of this type of material. Thus, this work will be obtained three plates laminated with tereft?lica polymeric matrix reinforced by a bidirectional woven E-glass and kevlar both industrially made, where the plates are manufactured by manual lamination process (hand lay-up), all laminates have five enhancement layers, the first hybrid laminate will consist of bidirectional woven E-glass fiber, kevlar fiber interspersed with layers, is formed by the second bidirectional woven kevlar fiber at the ends of the laminate (two layers), and in the center the glass fiber fabric (three layers), the third plate is composed of only the bidirectional woven E-glass fiber. Then were prepared specimens (CP) by standard, to determine the mechanical properties of tensile and bending in three points. After fabrication of the specimens, they were immersed in oil and seawater. After that, there was a comparison of the mechanical properties for the test condition in the dry state. Showing that there was a considerable increase in the properties studied because the effect of hybridization in laminates.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-08T21:11:24Z No. of bitstreams: 1 ArianoBritoDeFarias_DISSERT.pdf: 1699559 bytes, checksum: 34e87398edd5ddd9e4071c66e736ef1a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-12T20:56:12Z (GMT) No. of bitstreams: 1 ArianoBritoDeFarias_DISSERT.pdf: 1699559 bytes, checksum: 34e87398edd5ddd9e4071c66e736ef1a (MD5) / Made available in DSpace on 2016-07-12T20:56:12Z (GMT). No. of bitstreams: 1 ArianoBritoDeFarias_DISSERT.pdf: 1699559 bytes, checksum: 34e87398edd5ddd9e4071c66e736ef1a (MD5) Previous issue date: 2015-09-28 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Na ind?stria do petr?leo, o g?s natural ? um componente vital no suprimento de energia do mundo e uma importante fonte de muitos hidrocarbonetos. ? uma das mais limpas, mais segura e mais aplic?vel de todas as fontes de energia, e ajuda a conhecer a crescente demanda mundial por energia limpa no futuro. Com a crescente participa??o do g?s natural na matriz energ?tica no Brasil, o principal objetivo de seu uso tem sido o abastecimento de energia el?trica atrav?s da gera??o de energia t?rmica. No processo de produ??o atual, como em uma Unidade de Processamento de G?s Natural (UPGN), o g?s natural passa por diversas unidades de separa??o visando ? produ??o de g?s natural liquefeito e g?s combust?vel. Este ?ltimo deve ser especificado para atender as m?quinas t?rmicas. No caso dos po?os remotos, o processo de absor??o dos componentes pesados visando o seu ajuste ? uma alternativa para de aumentar a malha energ?tica do pa?s e/ou local. Atualmente, devido ? elevada demanda por este g?s processado, a pesquisa e o desenvolvimento de t?cnicas que visam o ajuste do g?s natural s?o estudados. M?todos convencionais hoje empregados, como a absor??o f?sica, possuem bons resultados. O objetivo do trabalho ? avaliar a remo??o dos componentes pesados do g?s natural. Nesta pesquisa foi utilizado como absorvente f?sico o ?lcool oct?lico. Foi estudada a influ?ncia dos par?metros, como temperatura (5?C e 40?C) e vaz?o (25 e 50 ml/min) sobre o processo de absor??o em termos de capacidade de absor??o, expresso pela quantidade absorvida; e em termos cin?ticos, expresso pelo coeficiente de transfer?ncia de massa. Conforme esperado pela literatura, foi observado que a absor??o das fra??es pesadas de hidrocarbonetos ? favorecida em baixas temperaturas. Por outro lado, tanto a temperatura como a vaz?o favorece a transfer?ncia de massa, efeito cin?tico. A cin?tica de absor??o de remo??o dos componentes pesados foi acompanhada atrav?s de an?lise cromatogr?fica e os resultados experimentais mostraram elevado percentual de recupera??o dos componentes pesados. Al?m disso, foi observado que o emprego de ?lcool oct?lico como agente absorvedor demonstrou ser vi?vel o processo de separa??o. / In the oil industry, natural gas is a vital component of the world energy supply and an important source of hydrocarbons. It is one of the cleanest, safest and most relevant of all energy sources, and helps to meet the world's growing demand for clean energy in the future. With the growing share of natural gas in the Brazil energy matrix, the main purpose of its use has been the supply of electricity by thermal power generation. In the current production process, as in a Natural Gas Processing Unit (NGPU), natural gas undergoes various separation units aimed at producing liquefied natural gas and fuel gas. The latter should be specified to meet the thermal machines specifications. In the case of remote wells, the process of absorption of heavy components aims the match of fuel gas application and thereby is an alternative to increase the energy matrix. Currently, due to the high demand for this raw gas, research and development techniques aimed at adjusting natural gas are studied. Conventional methods employed today, such as physical absorption, show good results. The objective of this dissertation is to evaluate the removal of heavy components of natural gas by absorption. In this research it was used as the absorbent octyl alcohol (1-octanol). The influence of temperature (5 and 40 ?C) and flowrate (25 and 50 ml/min) on the absorption process was studied. Absorption capacity expressed by the amount absorbed and kinetic parameters, expressed by the mass transfer coefficient, were evaluated. As expected from the literature, it was observed that the absorption of heavy hydrocarbon fraction is favored by lowering the temperature. Moreover, both temperature and flowrate favors mass transfer (kinetic effect). The absorption kinetics for removal of heavy components was monitored by chromatographic analysis and the experimental results demonstrated a high percentage of recovery of heavy components. Furthermore, it was observed that the use of octyl alcohol as absorbent was feasible for the requested separation process.