Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T19:56:11Z No. of bitstreams: 1 RaffaelAndradeCostaDeMelo_DISSERT.pdf: 1682019 bytes, checksum: 683a0601c5379c3cdd82b0e0b05d2b03 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-06T20:02:59Z (GMT) No. of bitstreams: 1 RaffaelAndradeCostaDeMelo_DISSERT.pdf: 1682019 bytes, checksum: 683a0601c5379c3cdd82b0e0b05d2b03 (MD5) / Made available in DSpace on 2017-06-06T20:02:59Z (GMT). No. of bitstreams: 1 RaffaelAndradeCostaDeMelo_DISSERT.pdf: 1682019 bytes, checksum: 683a0601c5379c3cdd82b0e0b05d2b03 (MD5) Previous issue date: 2017-03-30 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O esgotamento das reservas minerais e a preocupa??o crescente da sociedade com o meio ambiente e a sustentabilidade traz perspectivas animadoras nas ?reas de reciclagem de res?duos de equipamentos eletroeletr?nicos (REEE). Diante disso, este trabalho tem como objetivo desenvolver uma rota para reciclar metais presentes nas placas de circuito impresso (PCI) de computadores desktops obsoletos. Para isso foram feitos ensaios de lixivia??o utilizando diferentes ?cidos (n?trico, ?gua r?gia, clor?drico e sulf?rico) variando os par?metros de temperatura e de concentra??o molar do ?cido seguindo um planejamento experimental fatorial completo do tipo 2? com repeti??es no ponto central avaliou-se a efici?ncia do processo atrav?s do percentual de massa lixiviada obtida por an?lise gravim?trica. As amostras antes e depois dos ensaios de lixivia??o foram analisadas por FRX, MEV e EDS para que fossem identificados e quantificados os principais elementos qu?micos existentes, bem como determinar a morfologia das amostras de PCI utilizadas. Os melhores resultados alcan?ados em termos percentuais de massa lixiviada foram obtidos para ?gua r?gia e ?cido n?trico. J? os resultados de menor rendimento alcan?ados foram obtidos para o ?cido clor?drico e sulf?rico. O estudo estat?stico do ?cido n?trico demonstrou que a concentra??o molar do ?cido foi o ?nico fator que apresentou efeito significativo sobre a vari?vel resposta, n?o houve falta de ajuste e o coeficiente de correla??o (R?) estimado foi de 0,99111, indicando que o modelo de primeira ordem testado ? preditivo e significativo. J? para a ?gua r?gia, a concentra??o molar do ?cido e a intera??o temperatura/concentra??o foram os dois fatores que apresentaram efeito significativo sobre a vari?vel resposta e o modelo que melhor se adequou foi o de segunda ordem (R? de 0,99914). Por fim, as an?lises por FRX demonstraram quais elementos foram ou n?o lixiviados por cada ?cido. A ?gua r?gia apresentou facilidade em dissolver praticamente todos os metais. O ?cido n?trico dissolveu cobre, chumbo e c?lcio. Os ?cidos clor?drico e sulf?rico foram eficientes na lixivia??o do estanho, ferro e n?quel. De maneira geral, cada ?cido foi seletivo para diferentes elementos qu?micos presentes na composi??o das PCI, possibilitando assim desenvolver uma rota de reciclagem vi?vel baseado nesse estudo. / The reduction of mineral reserves and the growing concern of society with the environment and sustainability brings exciting prospects in the areas of recycling of waste electrical and electronic equipment (WEEE). Therefore, this paper aims to develop a route to recycle metals present on the printed circuit boards (PCB) of obsolete desktops computers. For this, leaching tests were performed using different acids (nitric, regal water, hydrochloric and sulfuric), varying the parameters of temperature and molar concentration of the acid following a complete factorial experimental design of the type 2? with repetitions at the central point was evaluated the process through the percentage of leached mass obtained by gravimetric analysis. The samples before and after the leaching tests were analyzed by FRX, MEV and EDS to identify and quantify the main chemical elements as well as the morphology of the PCB samples used. The best results obtained in percentage terms of leached mass were obtained for royal water and nitric acid. On the other hand, the results of lower yields were obtained for hydrochloric and sulfuric acid. The statistical study of nitric acid showed that the molar concentration of the acid was the only factor that had a significant effect on the response variable, there was no lack of fit and the estimated coefficient of correlation (R?) estimated was 0.99111, indicating that the first order model tested is predictive and significant. However, for the royal water the acid molar concentration and the temperature/concentration interaction were the two factors that had a significant effect on the response variable and the model that best suitable was the second order (R? of 0,99914). Finally, the FRX reviews demonstrated which elements were or were not leached by each acid. Regal water has shown ease in dissolving practically all metals. The nitric acid dissolved copper, lead and calcium. The hydrochloric and sulfuric acid were efficient in the leaching of tin, iron and nickel. In general, each acid was selective for different chemical elements present in the composition of the PCB and for this reason a viable recycling route based on this study is possible.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-07-26T14:29:37Z No. of bitstreams: 1 2011 - Erica Souto Abreu Lima.pdf: 2820587 bytes, checksum: d25ffc37d1a7468d5bf9a15ae5e020b7 (MD5) / Made available in DSpace on 2016-07-26T14:29:37Z (GMT). No. of bitstreams: 1 2011 - Erica Souto Abreu Lima.pdf: 2820587 bytes, checksum: d25ffc37d1a7468d5bf9a15ae5e020b7 (MD5) Previous issue date: 2011-02-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior-CAPES / LIMA, Erica Souto Abreu. Dynamic of barium in soils treated with barite. 2011. 44p. Dissertation (Master Science in Agronomy, Soil Science) Instituto de Agronomia, Departamento de Solos, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2011. Barite is the natural mineral form of barium sulfate (BaSO4), which is used in drilling fluids for oil wells exploration. Although barium sulfate is poorly soluble, and therefore, not very bioavailable to plants and with low mobility, it is not know the magnitude of changes in its dynamics under reducing soil conditions. Thus, the main objective of the study was to evaluate if under extreme reduction conditions the solubilization and release of barium in the soil would occur, increasing risk of contamination to plants and groundwater. Two experiments were conducted in parallel, one in leaching columns and the other in pots, where rice was cultivated as a test plant. In both trials soil samples from an Udox soil were used. The installation of experiments followed a completely randomized design in factorial scheme (4 x 2) with four replications, i.e., composed of control and three levels of barium (100, 300, and 3000 mg kg-1), two moisture levels (at 70% of field capacity and saturated with the maintenance of a 5 cm layer of water), totaling 32 experimental units. The redox potential (Eh), and pH values to reach the Eh of -200 mV were monitored. After reaching these values a rainfall of 200 mm day-1 was simulated in the columns, and volumes of 200 mL were collected. The extract was divided into volumes of 200 mL, corresponding to 1/8 of the soil pore volume, and they were analyzed for levels of barium and other toxic metals. The rice (Oryza sativa L.) plants in the vases remained throughout the vegetative cycle up to about 4 months, when they were harvested and analyzed. The geochemical fractionation was also performed for the elements barium, manganese and iron, by the BCR method. The results showed that the addition of doses of barite in soil, and the condition of extreme reduction led to the increase of barium, iron and manganese in the highest labile fractions. Thereby promoting higher levels of barium in the leachate extract. Under these conditions, the plants showed growth and development reduction. However, the barium may not be the main cause of this reduction, which may be linked to iron toxicity and lower absorption of zinc, phosphorus and calcium. / A baritina ? a forma mineral natural de sulfato de b?rio (BaSO4), que ? amplamente utilizada nos flu?dos de po?os de prospec??o de petr?leo. Apesar do sulfato de b?rio ser pouco sol?vel, e consequentemente, pouco biodispon?vel para as plantas e de baixa mobilidade, n?o se conhece a magnitude das altera??es na sua din?mica em condi??es redutoras do solo. Diante disso, o objetivo principal do estudo foi avaliar se em condi??es de extrema redu??o ocorre o aumento da solubiliza??o e como conseq??ncia libera??o do b?rio no solo, potencializando o risco de contamina??o para as plantas e ?guas subterr?neas. Foram realizados dois experimentos em paralelo, sendo um em colunas de lixivia??o e o outro em vasos, onde foi cultivado arroz como planta teste. Em ambos os ensaios foram utilizadas amostras de terra coletadas de Latossolo Vermelho Amarelo. A instala??o dos experimentos seguiu o delineamento experimental inteiramente casualizado, em esquema fatorial (4 x 2) com 4 repeti??es, ou seja, composto por testemunha e tr?s doses de b?rio (100, 300 e 3000 mg kg-1), dois teores de umidade (70% CC e saturado com presen?a de l?mina de 5 cm), totalizando 32 unidades experimentais. Foram monitorados o potencial redox (Eh) e o pH, at? atingirem valores de Eh de -200 mV. Ap?s atingirem esses valores foi simulada uma precipita??o pluviom?trica de 200 mm dia-1 nas colunas, onde foram coletados volumes de 200 mL. O extrato foi dividido em volumes de 200 mL, que correspondem a 1/8 do volume de poro da coluna de solo, para em seguida serem analisados quanto aos teores de b?rio e outros metais considerados t?xicos. As plantas de arroz (Oryza sativa L.) foram cultivadas nos potes por todo o ciclo vegetativo (aproximadamente 4 meses) at? serem colhidas e analisadas. Tamb?m foi realizado o fracionamento geoqu?mico para os elementos b?rio, mangan?s e ferro pelo m?todo BCR. Os resultados obtidos evidenciaram que a adi??o das doses de baritina no solo e a condi??o de extrema redu??o, propiciaram o aumento de b?rio, ferro e mangan?s nas fra??es de maior labilidade. Promovendo, assim, maiores teores de b?rio no extrato lixiviado. Nessas condi??es, as plantas apresentaram redu??o no seu crescimento e desenvolvimento. Por?m o b?rio pode n?o ser o principal causador dessa redu??o, podendo esta estar ligada a toxicidade do ferro e a uma menor absor??o de zinco, f?sforo e c?lcio.

CNPq / Faced with the need to implement a sustainable development, and seeking solutions for protecting the environment, the management of residues has undergone marked changes. Companies are increasingly involved in the optimization of residues produced in their production processes. The oil industry participates in this search by funding research and development of environmentally sound technologies. This study aimed to evaluate the development of barley plants (Hordeum vulgare L.) in soils incubated with drill waste from oil well treated by washing to eliminate the influence of sodium. Two residues generated during drilling of the well 7-SMC-50D-AL were selected to be used in two assays: one in pots planted with barley, and one with leaching columns. For the pots testing the residues were washed with water, using a ratio of 1:5, aiming to reduce the effects of the sodium. Thus, the washing treatment defined two other conditions: residue washed and unwashed. The quantity of residue added to the soil was defined in order to obtain the barium concentrations of 300 mg kg-1, 600 mg kg-1 and 1200 mg kg-1. The soil moisture was maintained at 70% of field capacity. The experimental units were kept incubated for 30 days, and covered with plastic bags to prevent water loss by evaporation. The plants sowing was made using 10 seeds in each pot, and after the thinning with 30 days there was left 4 plants per pot. After the harvesting, the plants were separated into root, shoot and grain; and it was evaluated the absorption of the elements barium, iron, manganese, calcium, sodium, zinc and potassium. The results showed that the residues of the centrifugal and the dryer promoted an increased production of plant dry matter, especially in the treatment with the residue washing. For the test columns, there was no washing of the residues. The same doses were tested with two conditions of humidity (70% of field capacity and reduced condition, simulating the presence of a ground water table). During the incubation the pH and the redox potential (Eh) were monitored until, in the reduction condition, values close to ? 200 mV were obtained, and then, waiting for 30 days to ensure the occurrence of the reduction reactions. After that, the leaching test proceeded, simulating rainfall and collecting the extract leachate to evaluate the barium content. The geochemical fractionation of barium was done using a modification of the BCR method. The fractionation results showed that the reduction condition provided greater availability of barium, increasing the bioavailable fraction for both cuttings. In the leaching test, there was an increase in barium level in the reduction condition, due to the reduction of sulfate to sulfide. / Diante da necessidade de implementar o desenvolvimento sustent?vel, buscando solu??es para a prote??o do meio ambiente, a gest?o de res?duos tem passado por mudan?as marcantes. As empresas est?o cada vez mais envolvidas na otimiza??o de res?duos produzidos em seus processos produtivos. A ind?stria petrol?fera participa dessa busca por solu??es atrav?s do financiamento de pesquisas e do desenvolvimento de tecnologias ambientalmente seguras. Este trabalho teve como objetivo avaliar o desenvolvimento de plantas de cevada (Hordeum vulgare L.) em solos incubados com res?duos de perfura??o de po?o de petr?leo tratados com lavagem para eliminar a influ?ncia do s?dio. Foram selecionados dois res?duos gerados durante a perfura??o do Po?o7-SMC-50D-AL para serem utilizados em dois ensaios: um com vasos cultivados com cevada e outro com colunas de lixivia??o. Para o ensaio com vasos foi feita a lavagem dos res?duos em ?gua, na propor??o 1:5, visando diminuir os efeitos do s?dio. Dessa forma, o tratamento de lavagem definiu duas condi??es: res?duo lavado e res?duo n?o lavado. A quantidade de res?duo adicionada ao solo foi definida de modo a atingir as concentra??es de b?rio de 300 mg kg-1, 600 mg kg-1 e 1200 mg kg-1. A umidade do solo foi mantida a 70% da capacidade de campo. As unidades experimentais permaneceram incubadas por 30 dias, cobertas com sacos pl?sticos para evitar a perda de ?gua por evapora??o. Em seguida foi feita a semeadura, utilizando 10 sementes em cada vaso, e com o desbaste ap?s 30 dias restaram apenas 4 plantas por vaso. Ap?s a coleta as plantas foram separadas em raiz, parte a?rea e gr?os e foi avaliada a absor??o dos elementos b?rio, ferro, mangan?s, c?lcio, s?dio, zinco e pot?ssio. Os resultados obtidos demonstraram que os res?duos do secador e da centr?fuga promoveram aumento da produ??o de mat?ria seca pelas plantas, principalmente no tratamento lavado. Para o ensaio com colunas n?o houve lavagem dos res?duos. Foram testadas as mesmas doses em duas condi??es de umidade (70% da capacidade de campo e ambiente reduzido com presen?a de l?mina de ?gua). Durante a incuba??o foi feito o monitoramento de pH e potencial redox (Eh) at? que, na condi??o de redu??o, fossem atingidos valores pr?ximos de -200 mV, aguardando por 30 dias para assegurar a ocorr?ncia das rea??es de redu??o. Em seguida foi feito o ensaio de lixivia??o, simulando uma precipita??o e coletando o extrato lixiviado para avalia??o quanto ao teor de b?rio. Foi feito o fracionamento geoqu?mico do elemento b?rio utilizando-se o m?todo BCR com algumas modifica??es. Os resultados mostraram que no fracionamento as fra??es biodispon?vel para ambos os res?duos na condi??o de redu??o proporcionou uma maior disponibilidade do b?rio. Na lixivia??o houve um aumento dos teores de b?rio na condi??o de redu??o proporcionado pela redu??o de sulfato a sulfeto.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T15:33:12Z No. of bitstreams: 2 lorena_leao_jesus.pdf: 826450 bytes, checksum: 3a10a7ec4a4676a5ccb38e308ea778fb (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T15:33:34Z (GMT) No. of bitstreams: 2 lorena_leao_jesus.pdf: 826450 bytes, checksum: 3a10a7ec4a4676a5ccb38e308ea778fb (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-22T15:34:18Z (GMT) No. of bitstreams: 2 lorena_leao_jesus.pdf: 826450 bytes, checksum: 3a10a7ec4a4676a5ccb38e308ea778fb (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-22T15:34:18Z (GMT). No. of bitstreams: 2 lorena_leao_jesus.pdf: 826450 bytes, checksum: 3a10a7ec4a4676a5ccb38e308ea778fb (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / A cultura do gergelim, Sesamum indicum L., por possuir cerca de 50% de teor de ?leo em suas sementes, surge como uma alternativa para produ??o de biocombust?veis podendo competir com outras oleaginosas. No entanto, a utiliza??o de sementes de alta qualidade ? de fundamental import?ncia para o estabelecimento da cultura. Para a cultura do gergelim n?o existem metodologias adequadas para avalia??o da qualidade fisiol?gica de suas sementes. Objetivou-se com esta pesquisa adequar as metodologias dos testes de condutividade el?trica, envelhecimento acelerado, lixivia??o de pot?ssio e tetraz?lio para avalia??o da qualidade de sementes de gergelim. Foram testadas as metodologias do teste de condutividade el?trica utilizando embebi??o por 4, 8, 12, 16, 20 e 24 horas e combina??es n?mero de sementes/volume de ?gua deionizada (25/25 mL; 25/50 mL; 25/75 mL; 50/25 mL; 50/50 mL e 50/75 mL), para o teste de envelhecimento acelerado testou-se a metodologia tradicional com ?gua e com solu??o saturada de NaCl por 0, 24, 48, 72 e 96 horas, para o teste de lixivia??o de pot?ssio, embebi??o por 30, 60, 90, 120, 150 e 180 minutos, nas combina??es n?mero de sementes/volume de ?gua destilada (25/25 mL; 25/50 mL; 50/25 mL; 50/50 mL) e no teste de tetraz?lio foram testadas as concentra??es de 0,075%; 0,5% e 1,0% de solu??o de tetraz?lio a 25 ?C, por 3, 6, 8, 12, 18 e 24 horas. Concluiu-se que no teste de condutividade el?trica o per?odo de embebi??o de 4 horas e a combina??o de 25 sementes com 75 mL e 50 sementes com 75 mL ? eficiente para a distin??o da qualidade fisiol?gica de sementes de gergelim. Para o teste de envelhecimento acelerado o per?odo de envelhecimento de 48 horas pelo m?todo tradicional ou 72 horas e 96 horas com solu??o saturada de NaCl permite separar as cultivares de gergelim em diferentes n?veis de vigor. No teste de lixivia??o de pot?ssio a combina??o 25 sementes, 25 mL de ?gua e 60 minutos ou 90 minutos de embebi??o ? adequada para avalia??o do potencial fisiol?gico das sementes. A embebi??o das sementes sobre papel por 60 minutos, seguida de corte longitudinal e imers?o em solu??o de tetraz?lio na concentra??o de 0,075% por 12 horas e 1,0% por 3 horas ? eficiente na avalia??o da viabilidade das sementes de gergelim. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT The culture of, Sesamum indicum L., possess a circa of 50% content of oil within the seeds, surge as an alternative for the production of biofuels able to compete with other oilseeds. However, the utilization of high quality seeds is of fundamental importance for the establishment of cultivation. For the cultivation of sesame seeds, there exists no adapted methodologies for the evaluation of physical quality of the seeds. The objective of this study is to adapt a methodology to tests of electrical conductivity, accelerated aging, tetrazolium and potassium leachate to evaluate the quality of the seeds. The methodology of the electrical conductivity test were tested using imbibition for 4, 8, 12, 16, 20 and 24 hours and a number of combinations of seeds/volume in deionized water (25/25 mL; 25/50 mL; 25/75 mL; 50/25 mL; 50/50 mL e 50/75 mL), for the accelerated aging test tested the traditional methodology applied was with water and saturated solution NaCl for 0, 24, 48, 72 and 96 hours, for potassium leachate, imbibition for 30, 60, 90, 120 and 180 minutes with a number of combinations of seeds/volume in distilled water (25/25 mL; 25/50 mL; 50/25 mL and 50/50 mL) and tetrazolium test concentrations were 0.075%, 0.5% and 1.0% of the tetrazolium solution, at 25 ?C, for 3, 6, 8, 12, 18 and 24 hours. The conclusion of the electrical conductivity test demonstrate that the period of imbibition for 4 hours and the combination of 25 seeds with 75 mL of water and 50 seeds with 75 mL of water is efficient for the distinction of the physiological quality of the sesame seeds. For the test of accelerated aging, the period of aging for 48 hours by the traditional method or 72 hours and 96 hours with the saturated solution NaCl, permits the separation of the cultivars of sesame seeds in different levels of vigor. In the potassium leachate test, a combination of 25 seeds with 25 mL of water for 60 minutes or 90 minutes of imbibition is adequate for the evaluation of the physiological potential of the seeds. The imbibition of the seeds on paper for 60 minutes, following a longitudinal cut and immersion in the tetrazolium solution with a concentration of 0.075% for 12 hours and 1.0% for 3 hours is efficient in the evaluation of the viability of the sesame seeds.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-27T17:39:00Z No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-29T20:16:49Z (GMT) No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) / Made available in DSpace on 2016-06-29T20:16:49Z (GMT). No. of bitstreams: 1 MariaLuizaDeSouzaMedeiros_DISSERT.pdf: 778297 bytes, checksum: 3012a0a9e0e06a0f632900e02f88e311 (MD5) Previous issue date: 2015-12-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A avalia??o do vigor de sementes ? um fator importante para a detec??o de lotes de sementes de alta qualidade, de modo que o desenvolvimento de procedimentos para avaliar o potencial fisiol?gico tem sido importante ferramenta dentro de programas de controle de qualidade de sementes. Nesse sentido, este trabalho teve como objetivo adequar as metodologias dos testes de envelhecimento acelerado, condutividade el?trica e lixivia??o de pot?ssio para a avalia??o do vigor de sementes de Moringa oleifera LAM.. Para tanto, quatro lotes de sementes foram submetidos aos testes de germina??o, emerg?ncia de pl?ntula, ?ndice de velocidade de emerg?ncia, primeira contagem de emerg?ncia, comprimento e massa seca de pl?ntulas e teste frio, para a sua caracteriza??o fisiol?gica, al?m dos testes de envelhecimento acelerado, condutividade el?trica e lixivia??o de pot?ssio. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repeti??es de 50 sementes, e as m?dias comparadas pelo teste de Tukey a 5% de probabilidade, sendo realizada a an?lise de regress?o polinomial no teste de condutividade el?trica. Para o teste de envelhecimento acelerado, foram estudados os per?odos de envelhecimento de 12, 24 e 72 horas, a 40, 42 e 45 ?C. Para o teste de condutividade el?trica, utilizou-se a temperatura de 25 ?C por per?odos de 4, 8, 12, 16 e 24 horas de imers?o, em 75 e 125 mL de ?gua destilada, utilizando-se 25 e 50 sementes e, para o teste de lixivia??o de pot?ssio, utilizou-se amostras de 25 e 50 sementes, colocadas em copos pl?sticos contendo 70 e 100 mL de ?gua destilada ? 25 ?C por per?odos de 1, 2, 3, 4, 5 e 6 horas. A partir dos resultados obtidos, pode-se inferir que as metodologias que melhor se ajustaram para o teste de envelhecimento acelerado em sementes de moringa foram a temperatura de 40 ?C por 12 e 72 horas, 42 ?C a 72 horas e 45 ?C a 24 horas. Para o teste de condutividade el?trica em sementes de moringa, a combina??o de 50 sementes em 75 mL de ?gua destilada por per?odo de embebi??o de 4 horas e, 50 sementes em 125 ml por 4 horas foram eficiente para a diferencia??o dos lotes de sementes de moringa quanto ao vigor e, para o teste de lixivia??o de pot?ssio em sementes de moringa, a combina??o de 50 sementes /100 mL de ?gua destilada permitiu a separa??o dos lotes em quatro n?veis de vigor, a partir de 2 horas de imers?o, mostrando-se promissor na avalia??o da qualidade de sementes de moringa. / The evaluation of seed vigor is an important factor for detection of lots of high quality seeds, so that development of procedures to evaluate the physiological potential has been an important tool in quality control programs seeds. In this sense the study aimed to adapt the methodologies of accelerated aging, electrical conductivity and potassium leaching to evaluate Moringa oleifera seed vigor LAM.. Therefore, four lots of moringa seeds were subjected to the germination tests, seedling emergence, speed of emergence index, emergence first count, length and dry mass of seedlings and cold test for their physiological characterization, in addition to accelerated aging, electrical conductivity and potassium leaching. The experimental design was completely randomized with four replications of 50 seeds and the means compared by Tukey test at 5% probability. For accelerated aging the periods were studied aging 12, 24 and 72 hours at 40, 42 and 45?C. For the electrical conductivity test was used to a temperature of 25?C for periods of 4, 8, 12, 16 and 24 hours of immersion in 75 to 125 mL of distilled water, using 25 to 50 seeds, and for potassium leaching test samples were used 25 to 50 seeds, placed in plastic cups containing 70 and 100 mL of distilled water at 25?C for periods of 1, 2, 3, 4, 5 and 6 hours. From the results obtained, it can be inferred that the methods best fit for the accelerated aging test Moringa seeds were a temperature of 40?C for 12 to 72 hours, 42?C 72 hours 45?C 24 hours . In the electrical conductivity test Moringa seeds, the combination of 50 seeds in 75 mL distilled water for a period of immersion of 4 hours and 50 seeds in 125 mL of 4 hours were efficient for the differentiation of lots of Moringa seeds as to vigor and for potassium leaching test moringa seeds, the combination of 50 seeds in 100mL of distilled water allowed the separation of lots of four levels of vigor, at 2 hours of immersion, showing promise in evaluate the quality of moringa seeds.

Made available in DSpace on 2014-12-17T14:17:54Z (GMT). No. of bitstreams: 1 MirellaCSA_DISSERT.pdf: 648930 bytes, checksum: 06627ea14cbf2543775d82cecd4ee6ec (MD5) Previous issue date: 2014-03-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Mimosa caesalpiniaefolia Benth. is a forest species of the Mimosaceae family, recommended for recovery of degraded areas. The evaluation of vigor by biochemical tests have been an important tool in the control of seed quality programs, and the electrical conductivity and potassium leaching the most efficient in the verifying the physiological potential. The objective, therefore, to adjust the methodology of the electrical conductivity test for seeds of M. caesalpiniaefolia, for then compare the efficiency of this test with the potassium in the evaluation of seed vigor of different lots of seeds M. caesalpiniaefolia. To test the adequacy of the electrical conductivity were used different combinations of temperatures , 25 ?C and 30 ?C, number of seeds , 25 and 50, periods of imbibition , 4 , 8 , 12 , 16 and 24 hours , and volumes deionized water, 50 mL and 75mL. For potassium leaching test, which was conducted from the results achieved by the methodology of the adequacy of the electrical conductivity test, to compare the efficiency of both tests , in the classification of seeds at different levels of vigor, and the period 4 hours also evaluated because the potassium leaching test can be more efficient in the shortest time . The best combination obtained in experiment of electrical conductivity is 25 seeds soaked in 50 mL deionized or distilled water for 8 hours at a temperature of 30 ? C. Data were subjected to analysis of variance, the means were compared with each other by F tests and Tukey at 5 % probability, and when necessary polynomial regression analysis was performed. The electrical conductivity test performed at period eight hour proved to be more efficient in the separation of seed lots M. caesalpiniaefolia at different levels of vigor compared to the potassium test / Mimosa caesalpiniaefolia Benth. ? uma esp?cie florestal pertencente ? fam?lia Mimosaceae, recomendada para recomposi??o de ?reas degradadas. A avalia??o do vigor por meio de testes bioqu?micos tem sido importante ferramenta dentro de programas de controle de qualidade de sementes, sendo os testes de condutividade el?trica e lixivia??o de pot?ssio um dos mais utilizados na verifica??o do potencial fisiol?gico. Objetivou-se, portanto, adequar a metodologia do teste de condutividade el?trica para sementes de M. caesalpiniaefolia, para ent?o comparar a efici?ncia deste teste com o de lixivia??o de pot?ssio na avalia??o de vigor das sementes dos diferentes lotes de M. caesalpiniaefolia. Para o teste de adequa??o da condutividade el?trica foram utilizadas diferentes combina??es de temperaturas, 25 e 30 ?C, de n?mero de sementes, 25 e 50, de per?odos de tempo de embebi??o, 4, 8, 12, 16 e 24 horas, e de volumes de ?gua deionizada, 50 e 75 mL. Para o teste de lixivia??o de pot?ssio, que foi realizado a partir dos resultados alcan?ados pela metodologia da adequa??o do teste de condutividade el?trica, p?de-se comparar a efici?ncia de ambos os testes, na classifica??o dos lotes das sementes em diferentes n?veis de vigor, sendo o per?odo de 4 horas tamb?m avaliado devido o teste de lixivia??o de pot?ssio poder ser mais eficiente em menor espa?o de tempo. A melhor combina??o obtida no experimento de adequa??o da condutividade el?trica ? a combina??o de 25 sementes embebidas em 50 mL de ?gua deionizada durante 8 horas a uma temperatura de 30 ?C. Os dados foram submetidos ? an?lise de vari?ncia, as m?dias comparadas entre si pelos testes F e de Tukey a 5% de probabilidade, e quando necess?rio foi realizada an?lise de regress?o polinomial. O teste de condutividade el?trica realizado no per?odo de oito horas mostra ser mais eficiente na separa??o de lotes de sementes de M. caesalpiniaefolia em diferentes n?veis de vigor comparativamente ao teste de lixivia??o de pot?ssio