Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-09-11T13:48:17Z No. of bitstreams: 1 2012 - Jos? Evandro Gerv?sio de Oliveira.pdf: 1339113 bytes, checksum: 157cc8e574872feafeb6d9df50fd7792 (MD5) / Made available in DSpace on 2018-09-11T13:48:17Z (GMT). No. of bitstreams: 1 2012 - Jos? Evandro Gerv?sio de Oliveira.pdf: 1339113 bytes, checksum: 157cc8e574872feafeb6d9df50fd7792 (MD5) Previous issue date: 2012-08-14 / Businesses that involve the creation and use of the horse occupy a prominent position in developed countries and in many those developing countries, like Brazil and Argentina. However, little is known about the configuration of the Horse Agribusiness, particularly their contribution in generating income and jobs. Highlighting the need for studies aimed at the development of this activity and related economic sectors, since the breeding of horse in Brazil is approximately 5.8 million and 2.5 million heads in Argentina. There is a growing interest in scientific research in the production of horses. Agricultural activity in Brazil and Argentina, specifically the production of horses and their derivatives, has great relevance for the economy of both countries. Within this context, there is a chance that the knowledge of this chain is the main factor in the increase of production and generation of employment and income. Thus, this study aims to verify the asymmetries and similarities in the production of horses in southern Brazil (RS) and Argentina, analyzing the productive, health and trade aspects. This is a descriptive study, the multiple case study, which uses empirical research to investigate a contemporary phenomenon. The methodology used during this descriptive study comprised collection, tabulation and analysis of primary and secondary data, through field work and library research. The sample consisted of horses producers in Rio Grande do Sul, Brazil and in Argentina, the intentional type non-probabilistic. The collected data were tabulated in a spreadsheet Excell Version 2010 and for the descriptive analyzes it was used the Statistical Package for Social Science (SPSS Inc. Chicago, Illinois, USA), version 15.0. To complement the statistical analyzes were performed nonparametric analyzes on the observed frequencies. The observed frequencies were evaluated in 2x2 contingency tables. Relative frequencies were compared using the chi-square (?2) test at 5% probability using the InStat statistical package. As a result, it was observed that there is a similarity in various aspects in the production and trade, whereas in the health aspects are asymmetry in certain respects. It was concluded that at the complex agribusiness horse there are several activities that resemble and other distinguished. Based on this study, regional policies could be implemented in order to develop best practices observed by optimizing the horse production in both countries. / Os neg?cios que envolvem a cria??o e utiliza??o do cavalo ocupam uma posi??o de destaque nos pa?ses desenvolvidos e em muitos daqueles em desenvolvimento, como o Brasil e a Argentina. No entanto, pouco se conhece sobre a configura??o do Agroneg?cio do Cavalo, particularmente, a sua contribui??o na gera??o de renda e de postos de trabalho. Destacandose a necessidade de estudos que visem o desenvolvimento desta atividade e dos segmentos econ?micos relacionados, visto que o plantel de equino brasileiro ? de, aproximadamente, 5,8 milh?es de cabe?as e 2,5 milh?es na Argentina. H? um crescente interesse em pesquisas cient?ficas no complexo de cavalos. A atividade agropecu?ria no Brasil e na Argentina, especificamente, a produ??o de equinos e seus derivados, possuem grande relev?ncia para economia de ambos os pa?ses. Dentro desse contexto, existe a hip?tese de que o conhecimento dessa cadeia ? o principal fator na eleva??o da produ??o e gera??o de emprego e renda. Sendo assim, esse trabalho tem por objetivo verificar as assimetrias e semelhan?as na cria??o de equinos no sul do Brasil (RS) e na Argentina, analisando os aspectos produtivos, sanit?rios e comerciais. Trata-se de um estudo descritivo, do tipo estudo de caso m?ltiplo, que utiliza uma investiga??o emp?rica para averiguar um fen?meno contempor?neo. A metodologia utilizada no decorrer desse estudo descritivo compreendeu coleta, tabula??o e an?lise de dados prim?rios e secund?rios, atrav?s de trabalhos de campo e pesquisas bibliogr?ficas. A amostra foi constitu?da por produtores de equinos do Rio Grande do Sul, Brasil e da Argentina, do tipo intencional n?o probabil?stica. Os dados coletados foram tabulados em planilha eletr?nica Excell Vers?o 2010 e para as an?lises descritivas utilizou-se o Statistical Package for Social Science (SPSS Inc. Chicago, Illinois, EUA), vers?o 15.0. A fim de complementar as an?lises estat?sticas, foram efetuadas as an?lises n?o param?tricas sobre as frequ?ncias observadas. As frequ?ncias observadas foram avaliadas em tabelas de conting?ncias 2x2. As frequ?ncias relativas foram comparadas por meio do teste de Qui-quadrado (?2) a 5% de probabilidade, utilizando-se o pacote estat?stico InStat. Como resultado, observou-se que existe uma semelhan?a em v?rios aspectos na produ??o e no comercial, enquanto que no sanit?rio h? uma assimetria em alguns aspectos. Concluiu-se que no complexo do agroneg?cio equino existem diversas atividades que se assemelham e outras que se distinguem. Com base neste estudo, pol?ticas regionais poderiam ser implantadas a fim de se desenvolver as melhores pr?ticas observadas, otimizando a cria??o de equinos em ambas as localidades

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-09-12T16:46:41Z No. of bitstreams: 1 2009 - Liziana Maria Rodrigues.pdf: 560442 bytes, checksum: 3ed65532525d106ac2a5c430b0f2059b (MD5) / Made available in DSpace on 2018-09-12T16:46:41Z (GMT). No. of bitstreams: 1 2009 - Liziana Maria Rodrigues.pdf: 560442 bytes, checksum: 3ed65532525d106ac2a5c430b0f2059b (MD5) Previous issue date: 2009-10-29 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / This study was carried out to estimate the prececal and total nutrient?s digestibility of forages by total feces collection and mobile bag techniques and evaluate the passage kinetics in the digestive tract of horses using mobile bags. This work was conducted with three assays. The first was carried out to estimate nutrient?s digestibility of coast cross hay (Cynodon dactylon cv. coastcross) with the total feces collection technique. The second assay was carried out to estimate nutrient?s digestibility of lucerne hay (Medicago sativa), coast cross hay, and peanut forage (Arachis pintoi) with the mobile bag technique. The last one was carried out to evaluate the prececal nutrient?s digestibility of the same forages used at second assay with the mobile bag technique in a horse cannulated at cecum. The two first assays were simultaneously, with four horses with average weight of 300kg fed coast cross hay only. Water and mineral salt was offered ad libitum. The nylon bags has 45? of porosity and 6.5x 3.0cm of internal dimension and were fill with 663 mg of forage samples ground at 1mm. These assays had duration of 19 days, 10 days for adaptation and regulation of intake, and the last five days to introduce the bags in the stomach and, bags collections in the feces. Two insertions of bags were made at day with 25 bags, eight bags per forage and one empty bag. The feces and the bags were kept on the floor quickly after the horses crap, the bags were separate and the time noted. The assay of prececal digestibility had duration of 20 days which the first 5 days were to horse adaptation and the last 15 days were to insert and recovery the bags in the cecum. In this assay the bags were similar of those used in the first assay, but with a little washer in the border of the bags to possibility the recovery them in the cecum with a magnet. The magnet was place into the cannula near the ileocaecal junction, and at every 30 minutes beginning one hour after bag?s insertion in the stomach, the magnet was withdraw and the bags was removed until 7 hours later. Values of total digestibility with feces collection and mobile bags were similar with the possibility to use the mobile bag technique as alternative to feces collection. There wasn?t differences between digestibility of nutrients of lucerne and peanut forage with mobile bags technique (P<0.05), nevertheless those were higher than the coast cross hay. The use of mobile bag in cannulated horses allow to estimate the digestibility from different segments of the intestine, show to be a good alternative to study the digestion in horses / Este trabalho teve como objetivo estimar a digestibilidade parcial e total dos nutrientes de forrageiras atrav?s das t?cnicas de coleta total de fezes e sacos de n?ilon m?veis e avaliar a cin?tica de passagem de sacos de n?ilon m?veis no trato digest?rio de equinos. O experimento foi dividido em tr?s ensaios. O primeiro ensaio estimou a digestibilidade dos nutrientes do feno de coastcross (Cynodon dactylon cv. coastcross) atrav?s da coleta total de fezes. O segundo ensaio estimou a digestibilidade dos nutrientes do feno de alfafa (Medicago sativa), do feno de coastcross e do amendoim forrageiro (Arachis pintoi) com a t?cnica de sacos de n?ilon m?veis. O terceiro ensaio foi realizado utilizando as mesmas forrageiras do segundo ensaio, avaliando a digestibilidade pr?-cecal com a t?cnica dos sacos de n?ilon m?veis em equino fistulado no ceco. Os dois ensaios de digest?o iniciais foram realizados simultaneamente, com quatro equinos adultos com peso m?dio de 300kg alimentados com dieta exclusiva de feno de coastcross. A ?gua e o sal mineral foram fornecidos ad libitum. Foram utilizados sacos de n?ilon com porosidade de 45? com dimens?es internas de 6,5x 3cm, e preenchidos com 663mg de amostra das forrageiras mo?das a 1mm. Os dois ensaios iniciais tiveram dura??o de 19 dias, sendo 10 dias de adapta??o e regula??o do consumo da dieta, cinco dias para inser??o g?strica dos sacos, coleta total de fezes e dos sacos de n?ilon nas fezes. Para inser??o g?strica dos sacos de n?ilon, foram feitas duas sondagens ao dia, com 25 sacos, oito com amostras de cada alimento e um em branco. As fezes e os sacos foram coletados do piso das baias imediatamente ap?s a excre??o, os sacos foram separados manualmente e anotado o tempo de tr?nsito. O ensaio de digest?o pr?-cecal teve dura??o de 20 dias sendo os cinco primeiros para adapta??o do animal ao manejo e 15 dias de sondagens e recupera??o dos sacos. Neste ensaio foram utilizados sacos semelhantes ao ensaio anterior, por?m em uma das extremidades dos sacos foi afixada uma arruela met?lica para permitir que o saco fosse recuperado no ceco com aux?lio de um im?. Este im? foi posicionado pr?ximo a jun??o ?leo-cecal e, a intervalos de 30 minutos, iniciando uma hora ap?s a inser??o dos sacos no estomago e, o im? foi retirado da c?nula e os sacos aderidos foram coletados at? 7 horas ap?s a inser??o g?strica. Os valores de digestibilidade total atrav?s da coleta de fezes e dos sacos m?veis foram semelhantes confirmando a possibilidade de utiliza??o dos sacos m?veis como alternativa a coleta de fezes. N?o houve diferen?a entre os coeficientes de digestibilidade do feno de alfafa e do amendoim forrageiro com os de sacos de n?ilon m?veis (P<0,05), no entanto estes foram maiores que o do feno de coastcross. O uso da t?cnica de sacos de n?ilon m?veis em animais fistulados permitiu estimar a digestibilidade pr?-cecal e p?s-ileal em equinos, mostrando ser uma alternativa vi?vel no estudo dos processos digestivos desta esp?cie.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-13T17:48:46Z No. of bitstreams: 1 2017 - Camila da Costa Barros de Souza.pdf: 3294573 bytes, checksum: 19a6a94e300565df61e362d626a65cf1 (MD5) / Made available in DSpace on 2018-09-13T17:48:46Z (GMT). No. of bitstreams: 1 2017 - Camila da Costa Barros de Souza.pdf: 3294573 bytes, checksum: 19a6a94e300565df61e362d626a65cf1 (MD5) Previous issue date: 2017-02-17 / FAPERJ / Residual herbicides, in some cases, can affect subsequente crops. In these situations, The use of phytoremediation species may be an alternative in the degradation of these molecules, minimizing the carryover risks. The first step in establishing if some species can be used as a phytoremediation, is check that it has tolerance to the product, for later verify its remedial effect. Against the foregoing, The present master's thesis aimed to identify plant species capable of phytoremediation the diclosulam herbicide, elucidating the biological mechanism of phytoremediation used by plants. For this, 3 different experiments were performed. In the first experiment, conducted at the Dow Agrosciences Experiment Station, it was selected, among the species Arachis pintoi, Brachiaria brizantha, Brachiaria decumbens, Canavalia ensiformis, Cajanus cajan e Crotalaria juncea, those that shows tolerance to the diclosulam herbicide. In the second experiment, conducted in the Universidade Federal Rural do Rio de Janeiro, it was evaluated the efficiency of the previously selected plant species to remediate soil contaminated with the diclosulam herbicide, using cucumber as a bioindicator plant. In the third experiment, conducted at Centro de Energia Nuclear na Agricultura (CENA/USP), it was verified if the tolerance mechanism of the two species that presented the greatest phytoremediation potential occurs due to the phenomena of absorption and / or translocation of the herbicide by the plant. The doses of diclosulam herbicide tested in the first and second experiments were 21, 42, 63, e 84 g ha-1 + control (without presence of the herbicide); And in the third experiment, the doses that were tested was 42 g ha-1 + control (without presence of the herbicide). The species Arachis pintoi, Canavalia ensiformis, Cajanus cajan e Crotalaria juncea showed a tolerance to the diclosulam herbicide at the doses tested, and the species Canavalia ensiformis, Cajanus cajan e Crotalaria juncea were efficient in the dissipation/degradation of these molecules in the soil, it is pointed out that the last two species were those that presented the greatest remedial effect. Using the 14C radiolabeled herbicide in its moleculares structure, could be inferred through the mass balance and observation of the radioimagens of the species Crotalaria juncea e Cajanus cajan that the phytoremediative action performed by these species is, probably, through phytostimulation. In addition, there is an anatomic / metabolic barrier of diclosulam translocation in the collar of these species, which gives them tolerance to this herbicidal molecule. / Herbicidas residuais, em alguns casos, podem afetar culturas subsequentes. Nestas situa??es, o uso de esp?cies fitorremediadoras pode ser uma alternativa na degrada??o destas mol?culas, minimizando o risco de carryover. O primeiro passo para estabelecer se uma esp?cie pode ser utilizada como fitorremediadora, ? verificar se a mesma apresenta toler?ncia ao produto, para posteriormente verificar o seu efeito remediador. Diante do exposto, a presente disserta??o de mestrado teve por objetivo identificar esp?cies vegetais capazes de fitorremediar o herbicida diclosulam, elucidando o mecanismo biol?gico de fitorremedia??o empregado pelas plantas. Para isso foram realizados 3 experimentos distintos. No primeiro experimento, realizado na Esta??o Experimental da Empresa Dow Agrosciences, foi selecionado, dentre as esp?cies Arachis pintoi, Brachiaria brizantha, Brachiaria decumbens, Canavalia ensiformis, Cajanus cajan e Crotalaria juncea, aquelas que apresentem toler?ncia ao herbicida diclosulam. No segundo experimento, realizado na Universidade Federal Rural do Rio de Janeiro, avaliou-se a efici?ncia das esp?cies vegetais, previamente selecionadas, em remediar solo contaminado com o herbicida diclosulam, utilizando o pepino como planta bioindicadora. No terceiro experimento, realizado no Centro de Energia Nuclear na Agricultura (CENA/USP), foi verificado se o mecanismo de toler?ncia das duas esp?cies que apresentaram maior potencial fitorremediador ocorre devido aos fen?menos de absor??o e/ou transloca??o do herbicida pela planta. As doses do herbicida diclosulam testadas no primeiro e segundo experimento foram 21, 42, 63, e 84 g ha-1 + controle (sem presen?a do herbicida); E no terceiro experimento foram testadas as doses 42 g ha-1 + controle (sem presen?a do herbicida). As esp?cies Arachis pintoi, Canavalia ensiformis, Cajanus cajan e Crotalaria juncea apresentaram toler?ncia ao herbicida diclosulam nas doses testadas, sendo as esp?cies Canavalia ensiformis, Cajanus cajan e Crotalaria juncea eficientes na dissipa??o/degrada??o dessas mol?culas no solo, posto que as duas ?ltimas esp?cies foram as que apresentaram maior efeito remediador. Utilizando o herbicida radiomarcado com 14C em sua estrutura molecular, p?de-se inferir atrav?s do balan?o de massa e observa??o das radioimagens das esp?cies Crotalaria juncea e Cajanus cajan que a a??o fitorremediadora exercida por essas esp?cies ?, provavelmente, atrav?s da fitoestimula??o. Ademais, existe uma barreira anat?mica/metab?lica de transloca??o do diclosulam no coleto dessas esp?cies, o que lhes confere toler?ncia ? essa mol?cula herbicida.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-13T18:00:52Z No. of bitstreams: 1 2017 - Patr?cia Pereira dos Santos.pdf: 4096674 bytes, checksum: fad363b0fe43573e4533f28f7a47747e (MD5) / Made available in DSpace on 2018-09-13T18:00:52Z (GMT). No. of bitstreams: 1 2017 - Patr?cia Pereira dos Santos.pdf: 4096674 bytes, checksum: fad363b0fe43573e4533f28f7a47747e (MD5) Previous issue date: 2017-04-17 / The use of geotechnologies has been widely used in environmental monitoring and control processes in the Brazilian territory. As a way of identifying the perpetrators of environmental liabilities and promoting an environmental regularization of private rural properties, the government institutes a mandatory national non-CAR (Rural Environmental Cadastre) registry, a mandatory electronic registration platform, where the owner declares A Area of your property and your affairs. This work consisted of analyzing and discussing the research tools of CAR, the federal government, Canada, Rio de Janeiro, and other modules developed by the State of Minas Gerais and S?o Paulo. The quality of the tools available for the delimitation of the real estate, the native vegetation areas, the permanent preservation areas, the restricted use area and the legal reserve were analyzed, using images provided by public agencies and Alternative computational programs, in addition to primary data collected in the study areas, using a GNSS navigation receiver, for the purpose of solving problems with the geo-referenced areas for the use of topographic equipment, foreseeing a possibility of obtaining different results on the same Spatial reality, and thus confront the results in order to find a better methodology indicated for the mapping in the CAR. The results indicate that the platform of the car is very simple and it is essential for its operation of prior knowledge of the current legislation, as platforms allow an insertion of data obtained by different means, not meeting a standard obligation of scale mapping and spatial resolution, With the exception of the paulista pallet, which limits the insertion of the data, can vary in terms of real information, such as images made available, for the Federal platform, for some regions, not satisfactorily satisfied with the visual identification of the features, Making it necessary to use alternative data and computer programs, with the exception of a platform in the State of S?o Paulo, which presents an excellent image for the identification of features required in the CAR, although it is not current. / O uso de geotecnologias vem sendo amplamente empregado em processos de monitoramento e fiscaliza??o ambiental do territ?rio brasileiro. Como forma de identificar os autores de passivos ambientais e promover a regulariza??o ambiental de propriedades rurais privadas, o governo instituiu em ?mbito nacional a obrigatoriedade de cadastro no CAR (Cadastro Ambiental Rural), plataforma de registro eletr?nico, obrigat?rio, onde o propriet?rio/possuidor declara a ?rea de seu im?vel e seus aspectos ambientais. Este trabalho consistiu em analisar e discutir as ferramentas do m?dulo do CAR, do governo Federal brasileiro, adotado pela grande maioria dos Estados, inclusive o Rio de Janeiro, e comparar com os m?dulos desenvolvidos pelo Estado de Minas Gerais e S?o Paulo. Foram analisadas as diferen?as entre as plataformas, qualidade das ferramentas dispon?veis para a delimita??o dos im?veis, das ?reas de vegeta??o nativa, ?reas de preserva??o permanente, ?rea de uso restrito e reserva legal, utilizando-se de imagens gratuitas disponibilizadas por ?rg?os p?blicos, e programas computacionais alternativos, al?m de dados prim?rios coletados nas ?reas de estudo, utilizando um aparelho receptor GNSS de navega??o, para fins de compara??o com as ?reas j? georreferenciadas por uso de equipamentos topogr?ficos, vislumbrando a possibilidade de se obter diferentes resultados sobre uma mesma realidade espacial, e assim confrontar os resultados a fim de se encontrar a melhor metodologia indicada para o mapeamento no CAR. Os resultados apontam que embora a plataforma do CAR seja bastante amig?vel e simples, ? imprescind?vel para sua opera??o conhecimento pr?vio da legisla??o vigente, as plataformas permitirem a inser??o de dados obtidos por meios distintos, n?o estabelecendo uma obrigatoriedade padr?o de escala de mapeamento e de resolu??o espacial, com exce??o da plataforma paulista, que limita a inser??o dos dados, pode possibilitar diverg?ncias significava em rela??o as informa??es reais, as imagens disponibilizadas, pela plataforma Federal, para algumas regi?es, n?o atendem satisfatoriamente quanto a identifica??o visual das fei??es, principalmente em pequenas propriedades, tornando necess?rio a utiliza??o de dados e programas computacionais alternativos, com exce??o a plataforma do Estado de S?o Paulo, que fornece imagem de excelente qualidade para a identifica??o das fei??es requeridas no CAR, embora n?o seja atual.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-09-20T17:04:32Z No. of bitstreams: 1 2016 - Nubia Valle Mezzavilla.pdf: 2915573 bytes, checksum: f7b585622179c2b55f0b4f83a2d41bda (MD5) / Made available in DSpace on 2018-09-20T17:04:32Z (GMT). No. of bitstreams: 1 2016 - Nubia Valle Mezzavilla.pdf: 2915573 bytes, checksum: f7b585622179c2b55f0b4f83a2d41bda (MD5) Previous issue date: 2016-06-29 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPQ / Studies of aluminum tolerance in seedlings aroeira-vermelha (Schinus terebinthifolius R.) were held in a growth chamber in the Department of Plant Science ? Laboratory of Chemistry of Rhizosphere in the Agronomy Institute of University Federal Rural of Rio de Janeiro. Experiments were carried out with different concentrations of aluminum in simple nutrient solution (with calcium) and a complete nutrient solution with concentrations range from 0, 25, 50, 100, 200, 400 and 800 ?M in the solution and in soil Oxisol which was added liming, P, K, and micronutrients. The liming varied from (zero, 500, 1000.2000 and 4000 kg ha-1 and with100, 60, 30 kg ha-1 of phosphorus, potassium and micronutrient Br-12, respectively), and a control treatment without liming, P, K and micronutrients. The evaluations were based on analysis of root growth using the root length parameters, root growth rate, relative and evaluated root elongation also shoot length, dry weight of shoot and root, stem diameter, pH of the rhizosphere and soil . It was found that it is important to time days after sowing, before the transfer of seedlings to the nutrient solution; it is indicated 18 days after sowing for simple nutrient solution and 15 days after sowing for complete solution. Root growth rate and relative root elongation are methods that should be recommended in studies with plants aroeira-vermelha. Complete diluted and balanced nutrient solutions, should be recommended in aluminum toxicity studies in this species rather than simple solutions only with calcium due to low potential for seed storage. Low concentration of Al simple solution led to increase root growth. The root length of Schinus terebinthifolius R. seedlings grown nutrient solutions paralyzed in concentration 131.87 87 ?M of Al. In the simple nutrient solution was only possible to establish the critical level of toxicity using the root growth rate obtaining the value of 88, 42 87 ?M aluminum. Schinus terebinthifolius R. response the application of liming and P, K and micronutrients when grown in a soil Oxisol substrate, and the dosage of 2164.64 kg ha-1 of lime, dosing which was obtained the highest root length. For dry weight of shoot of seedlings, only 1831.50 Kg ha-1 of lime was enough to hit the highest value / Os estudos da toler?ncia ao alum?nio em pl?ntulas de aroeira-vermelha (Schinus Terebinthifolius R.) foram realizados, em c?mara de crescimento no Laborat?rio de Qu?mica da Rizosfera no Departamento de Fitotecnia, Instituto de Agronomia da Universidade Federal Rural Rio de Janeiro. Foram realizados experimentos com diferentes concentra??es de Al em solu??o nutritiva simples (com c?lcio) e completa com concentra??es que variaram de 0, 25, 50, 100, 200, 400 e 800 ?M na solu??o e em solo Latossolo vermelho amarelo onde foi adicionado calagem, P, K, e micronutrientes. As dosagens de calagem variaram de tratamentos com calagem (0, 500, 1000, 2000 e 4000 Kg ha-1, sendo adicionados 100, 60 e 30 Kg ha-1de fosforo, pot?ssio e de micronutriente BR-12 respetivamente), al?m de um tratamento controle, sem calagem, P, K e micronutrientes. As avalia??es foram baseadas na an?lise do crescimento radicular utilizando os par?metros comprimento radicular, taxa de crescimento radicular, elonga??o radicular relativa e avaliados tamb?m o comprimento da parte a?rea, massa seca da parte a?rea e radicular, di?metro do colo, pH da rizosfera e do solo. Foi verificado que ? importante o tempo de dias ap?s a semeadura, antes da transfer?ncia das pl?ntulas para a solu??o nutritiva, sendo indicados 18 dias ap?s a semeadura para solu??o nutritiva simples e 15 dias ap?s a semeadura para solu??o completa. A taxa de crescimento radicular e a elonga??o radicular relativa s?o m?todos que devem ser recomendados em estudos com plantas de aroeira-vermelha. Solu??es nutritivas completas, dilu?das e balanceadas, devem ser recomendadas em estudos de toxidez de alum?nio nesta esp?cie ao inv?s de solu??es simples apenas com c?lcio, devido ao baixo potencial de reserva da semente. Baixas concentra??es de Al na solu??o simples, estimulou o crescimento de raiz. O comprimento de raiz de pl?ntulas de aroeira crescidas em solu??es nutritivas completas paralisou seu crescimento na concentra??o de 131,87 ?M de Al. Na solu??o simples s? foi poss?vel estabelecer o n?vel cr?tico de toxidez utilizando a taxa de crescimento radicular, obtendo o valor de 88,42 ?M de alum?nio. A aroeira respondeu a aplica??o de calagem, P, K e micronutrientes quando crescida em solo Latossolo Vermelho Amarelo, sendo a dosagem de 2164,64 Kg ha-1 de calc?rio a que obteve o maior comprimento radicular. Para a massa seca da parte a?rea somente 1831,50 Kg ha-1 de calc?rio foi suficiente para ser atingido o maior valor.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-09-24T12:22:53Z No. of bitstreams: 1 2017 - Carolina Olga da Fonseca Ribeiro.pdf: 957069 bytes, checksum: 6b731873bdaed13662659a64dff75afc (MD5) / Made available in DSpace on 2018-09-24T12:22:53Z (GMT). No. of bitstreams: 1 2017 - Carolina Olga da Fonseca Ribeiro.pdf: 957069 bytes, checksum: 6b731873bdaed13662659a64dff75afc (MD5) Previous issue date: 2017-03-31 / The objective of this paper was to evaluate the effects of freezing and cooling on the physiological quality and storage of pumpkin seeds (Cucurbita moschata Dusch), green beans (Phaseolus vulgaris L.) and maize (Zea mays L.) produced in biodynamic systems. The seeds were frozen at -18?C and cooled to 15?C for two periods (36 hours and 7 days) using two types of packaging (PET bottles and special plastic vacuum bags). These seeds were evaluated initially and after the treatments for vigor, germination percentage and sanity. After the treatments the seeds were stored under ambient conditions and in a cold room. Vigor and germination were evaluated every 45 days for six months and in the sixth month the sanity test was performed. For pumpkin seeds, treatment combining the exposure time of 36 hours at -18?C in PET packaging did not alter the physiological quality and percentage of fungi in the seeds. When submitted to -18?C for 7 days in vacuum packaging the lowest averages were found. During storage for six months, germination and first germination count resulted in higher averages when stored under refrigeration, and seedling length averages were statistically the same regardless of storage location. Time caused a reduction in seed viability and the reduction of the genera Aspergillus and Penicillium in pumpkin seeds. For green bean seeds, treatment combining the 7-day exposure time at -18?C and PET packaging did not alter the physiological quality of the seeds and fungus contamination. The lowest averages were obtained by combining the time of 36 hours, the vacuum packing and the temperature of -18?C. The storage site was not significant, while the time was relevant for the first germination test count, reducing viability. There was a reduction of the genus Penicillium in green bean seeds after 180 days of storage in both environments. For corn seeds, the highest percentages of germination were observed in the treatment combining the time of 36 hours at 15?C and the PET package, while for the seedling length and first count of the germination test, the exposure time of 7 days at -18?C provided higher averages in both packages. In the sanitary evaluation of this treatment using PET packaging, there was a significant increase in contamination by the genus Fusarium. The lowest percentages of germination were obtained in the treatment combining the time of 7 days at -18?C and the vacuum packaging. For seedling length and first count of germination test the time of 36 hours and vacuum packaging, regardless of temperature, provided the lowest averages. The storage site was not significant, while the time was relevant for all maize seed evaluations, reducing viability. In the sixth month an increase of the genus Penicillium was observed in the seeds stored in refrigeration. The results of this experiment suggest that the freezing of seeds at -18?C in PET packages, with different exposure times that will vary according to each species, may promote an increase in seed vigor and possible maintenance of viability and sanity during storage / Este trabalho teve como objetivo avaliar os efeitos do congelamento e do resfriamento na qualidade fisiol?gica e na armazenagem de sementes de ab?bora (Cucurbita moschata Dusch), feij?o-vagem (Phaseolus vulgaris L.) e milho (Zea mays L.), oriundas de cultivo biodin?mico. As sementes foram congeladas a -18?C e resfriadas a 15?C, por dois per?odos de tempo (36 horas e 7 dias), utilizando dois tipos de embalagem (garrafas PET e sacos pl?sticos especiais com v?cuo). Estas sementes foram avaliadas inicialmente e posteriormente aos tratamentos quanto ao vigor, ao percentual de germina??o e sanidade. Ap?s os tratamentos as sementes foram armazenadas em condi??es de ambiente e em c?mara fria. Foram realizadas avalia??es de vigor e germina??o a cada 45 dias por seis meses e no sexto m?s foi realizado o teste de sanidade. Para as sementes de ab?bora, o tratamento combinando o tempo de exposi??o de 36 horas a -18?C em embalagem PET n?o alterou a qualidade fisiol?gica e as porcentagens de fungos nas sementes. Quando submetidas a -18?C por 7 dias em embalagem a v?cuo foram encontradas as menores m?dias. Durante a armazenagem por seis meses, a germina??o e primeira contagem de germina??o resultaram em maiores m?dias quando armazenadas sob refrigera??o, e as m?dias de comprimento de pl?ntulas se apresentaram estatisticamente iguais, independente do local de armazenamento. O tempo provocou uma redu??o na viabilidade das sementes e a redu??o dos g?neros Aspergillus e Penicillium nas sementes ab?bora. Para as sementes de feij?o-vagem, o tratamento combinando o tempo de exposi??o de 7 dias a -18?C e a embalagem PET n?o alterou a qualidade fisiol?gica das sementes e a contamina??o por fungos. As menores m?dias foram obtidas combinando o tempo de 36 horas, a embalagem a v?cuo e a temperatura de -18?C. O local de armazenagem n?o foi significativo, enquanto que o tempo foi relevante para a primeira contagem do teste de germina??o, provocando redu??o da viabilidade. Ocorreu uma redu??o do g?nero Penicillium nas sementes de feij?o-vagem, ap?s 180 dias de armazenagem em ambos os ambientes. Para as sementes de milho, as maiores porcentagens de germina??o foram observadas no tratamento combinando o tempo de 36 horas a 15?C e a embalagem PET, enquanto que para o comprimento de pl?ntulas e primeira contagem do teste de germina??o, o tempo de exposi??o de 7 dias e a -18?C proporcionaram maiores m?dias, em ambas as embalagens. Na avalia??o sanit?ria deste tratamento utilizando a embalagem PET, ocorreu um aumento significativo na contamina??o pelo g?nero Fusarium. As menores porcentagens de germina??o foram obtidas no tratamento combinando o tempo de 7 dias a -18?C e a embalagem a v?cuo. Para o comprimento de pl?ntulas e primeira contagem do teste de germina??o, o tempo de 36 horas e a embalagem a v?cuo, independente da temperatura, proporcionaram as menores m?dias. O local de armazenagem n?o foi significativo, enquanto que o tempo foi relevante para todas as avalia??es das sementes de milho, provocando redu??o da viabilidade. No sexto m?s observou-se um aumento do g?nero Penicillium nas sementes armazenadas em refrigera??o. Os resultados deste experimento sugerem que o congelamento de sementes a -18?C em embalagens PET, com diferentes tempos de exposi??o que v?o variar de acordo com cada esp?cie, pode promover um aumento no vigor das sementes e poss?vel manuten??o da viabilidade e sanidade durante a armazenagem.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-25T18:29:19Z No. of bitstreams: 1 2017 - Mariana Telles Rocha.pdf: 1081497 bytes, checksum: ca49dd03a2afea90b84ff4c91dbf2f76 (MD5) / Made available in DSpace on 2018-09-25T18:29:19Z (GMT). No. of bitstreams: 1 2017 - Mariana Telles Rocha.pdf: 1081497 bytes, checksum: ca49dd03a2afea90b84ff4c91dbf2f76 (MD5) Previous issue date: 2017-05-29 / The paradigm of modern science has been questioned since its inception, and more broadly and profoundly in this century. There are some proposals to rethink it as a whole, relying on several theoretical-practical essays on how to emerge a different paradigm. For that, we will have different ontologies, epistemologies and methodologies, we will enunciate them from multiple places. This allows the existence of multi-faceted looks, reframing the notions of neutrality, rationalism, dualism, reductionism, one-sidedness as the only way to build a truly scientific knowledge. One of these places of enunciation is agroecology, currently recognized as science, social movement, practice, way of life, utopia, government policy, profession, formal education modality, ideology. In order to discuss these different definitions and practices in agroecology, in an attempt to interact and multiply efforts, a perspective that is being used and strengthened by collectives and individuals is the networking and construction of gift networks. To leave the modern paradigm of science and arrive at another under construction, it is necessary to consider the process of transition. Understanding the political character of scientific activity, taking into account the indissociability between teaching, research and extension, agroecology uses a series of methodologies to build agroecological knowledge, seeking to foster dialogue between different knowledge that are equally incomplete. One of the methodologies used is the agroecological and cultural caravans, which has a series of horizontal communication tools such as artistic pedagogical installations, graphic facilitation, and collaborative communication. The sources used for its conception were, among others, the experiences of peasant-to-peasant methodologies, caravans of citizenship, and pilgrimages of the land. We notice the need to consider the psychological structures in the understanding of the interaction and the relationship of this with the structure of society and with the structure of history. Through the moments and spaces built by the ?Comboio Agroecol?gico Sudeste? network, it was possible to see the relationships between the individual, the methodology, the epistemology in the construction of the paradigm of agroecology, and how the agroecological and cultural caravan contributes to the emergence of a new form of building knowledge. In order to deepen and to highlight the clues of this paradigm transition, it is necessary to understand i) whether and how we are moving from cartesian science to a systemic, complex, agroecological, post-normal, postmodern, and / or decolonial science; ii) whether and how we are moving from a state of automatic unconsciousness, which reproduces patterns, which does not assume commitments, to a state of individuation, a "Greater Being" committed to itself and to the collectives iii) how and if the network, through the Caravan of Rio de Janeiro, promoted the dialogue of knowledge in the construction of agroecological knowledge; is therefore to verify if and how we are polishing the lenses of seeing, feeling, thinking, intuiting and being in the world. Some categories emerged from the content analysis and collected interviews conducted to answer these questions. From the construction, realization and evaluation of the agroecological and cultural caravan of Rio de Janeiro, it was possible to verify the paradoxical and complex nature of reality, and the different understandings about what is supposedly a same event, process and a same methodology. / O paradigma da ci?ncia moderna vem sendo questionado desde seus prim?rdios, e mais ampla e profundamente neste s?culo. Existem algumas propostas para repens?-lo como um todo, contando com v?rios ensaios te?rico-pr?ticos de como emergir um paradigma diferente. Para tanto, contaremos com diferentes ontologias, epistemologias e metodologias, as enunciaremos de m?ltiplos lugares. Isso permite ? exist?ncia de olhares pluriversais, ressignificando as no??es de neutralidade, racionalismo, dualismo, reducionismo, unilateralidade como ?nico caminho de construir um conhecimento verdadeiramente cient?fico. Um desses lugares de enuncia??o ? a agroecologia, reconhecida atualmente como ci?ncia, movimento social, pr?tica, modo de vida, utopia, pol?tica governamental, profiss?o, modalidade de educa??o formal, ideologia. Para dialogar essas diferentes defini??es e pr?ticas na agroecologia, na tentativa de interagir e multiplicar esfor?os, uma perspectiva que vem sendo utilizada e fortalecida pelos coletivos e indiv?duos ? a atua??o em rede e constru??o das redes de d?divas. Para sair do paradigma moderno de ci?ncia e chegar a outro em constru??o, ? necess?rio considerarmos um processo de transi??o. Entendendo o car?ter pol?tico existente na atividade cient?fica, levando em considera??o a indissociabilidade entre ensino, pesquisa e extens?o, a agroecologia lan?a m?o de uma s?rie de metodologias para construir o conhecimento agroecol?gico, buscando fomentar o di?logo entre os diferentes saberes que s?o igualmente incompletos. Uma das metodologias utilizadas s?o as caravanas agroecol?gicas e culturais, que conta com uma s?rie de ferramentas de comunica??o horizontal como as instala??es art?sticas pedag?gicas, facilita??o gr?fica, comunica??o colaborativa. As fontes utilizadas para sua concep??o foram, entre outras, as experi?ncias das metodologias campesino-a-campesino, caravanas da cidadania, e romarias da terra. Notamos a necessidade de considerar as estruturas psicol?gicas no entendimento da intera??o e da rela??o desta com a estrutura da sociedade e com a estrutura hist?ria. Atrav?s dos momentos e espa?os constru?dos pela rede do projeto Comboio Agroecol?gico Sudeste, foi poss?vel enxergarmos as rela??es entre o indiv?duo, a metodologia, a epistemologia na constru??o do paradigma da agroecologia, e como a caravana agroecol?gica e cultural contribui para a emerg?ncia de uma nova forma de construir o conhecimento. Para aprofundar e evidenciar as pistas dessa transi??o de paradigmas, ? necess?rio entender i) se e como estamos transitando da ci?ncia cartesiana para uma ci?ncia sist?mica, complexa, agroecol?gica, p?s-normal, p?s-moderna, e/ou descolonial; ii) se e como estamos transitando de um estado de inconsci?ncia autom?tica, que reproduz padr?es, que n?o assume compromissos, para um estado de individua??o, um ?Ser Maior? compromissado com si mesmo e com os coletivos; iii) como e se a rede, atrav?s da Caravana do Rio de Janeiro, promoveu o di?logo de saberes na constru??o do conhecimento agroecol?gico; ?, portanto, verificar se e como estamos polindo as lentes de ver, sentir, pensar, intuir, ser e estar no mundo. Algumas categorias emergiram da an?lise de conte?do e entrevistas coletadas, realizadas para responder essas quest?es. A partir da constru??o, realiza??o e avalia??o da caravana agroecol?gica e cultural do Rio de Janeiro, foi poss?vel verificarmos a natureza paradoxal e complexa da realidade, e os diversos entendimentos acerca do que ? supostamente um mesmo acontecimento, processo e uma mesma metodologia.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-10-19T18:05:22Z No. of bitstreams: 1 2013 - Thadia Turon Costa da Silva.pdf: 3226072 bytes, checksum: 9173eea03b722347ce1269d2988d0a42 (MD5) / Made available in DSpace on 2018-10-19T18:05:22Z (GMT). No. of bitstreams: 1 2013 - Thadia Turon Costa da Silva.pdf: 3226072 bytes, checksum: 9173eea03b722347ce1269d2988d0a42 (MD5) Previous issue date: 2013-12-11 / FAPERJ / PIBEX (Programa Institucional de Bolsas de Extens?o, da Pr?-Reitoria de Extens?o - PR5 da Universidade Federal do Rio de Janeiro) / The objective of this study was to evaluate the different dimensions of organic vegetables quality proceeding from Family Agriculture and supplied to the School Food Programme in Petropolis. The evaluation was done based on centesimal composition, antioxidant activity, microbiological characteristics and pesticide residue. The organic vegetables evaluated were carrot (DaucuscarotaL.), broccoli (Brassicaoleraceae, var. it?lica), kale (Brassicaoleraceae, var. acephala) and cabbage (Brassicaoleraceae, var. capitata). The analysis performed were moisture determination, mineral fixed residues, lipid content, total proteins, carbohydrate, soluble and insoluble fibers, total soluble solids, total acidity, pH, ascorbic acid and pesticide residue. The antioxidant activity was based on the separation of DPPH radical and total phenolic content. Microbiologic analyses were conducted regarding sanitary indicators for food which were compared to standard values from the Brazilian legislation. As a complement, a dietary risk evaluation was conducted using the Maximum Theoretical Daily Intake (IDTM) and the Estimated Daily Intake. This evaluation was done through the medium intake for 10 year-old children, maximum limits of pesticide residue (LMR) and pesticide residue values detected on conventional agriculture food items. The results obtained were compared with the security limits (IDA) according to the medium weight of the studied population. The effectiveness of the antioxidant capacity of the vegetables was obtained in a decreasing order: broccoli, kale, cabbage and carrot. Regarding the microbiologic parameter, the vegetables presented a satisfactory sanitary quality. No pesticide residues were found above detection limits for both authorized and non-authorized organic vegetables producers. The organic vegetables analyzed follow the standards for quality and security demanded by the Law 1197/2009 which prioritizes food for the school programme. Regarding the dietary risk evaluation, orange, apple, tomato, rice and beans were the food items which showed, for children, the highest chronic intake risk for presenting IDTM higher than IDA for the following pesticides: dicofol, dimethoate, methidathion, pirimiphos-methyl, tetraconazol and carbaryl. Key-words: organic food, vegetables, food security / O presente estudo teve como objetivo avaliar as diferentes dimens?es da qualidade de hortali?as org?nicas provenientes da agricultura familiar fornecidas ? alimenta??o escolar do munic?pio de Petr?polis, a partir da avalia??o da composi??o centesimal, atividade antioxidante, caracter?sticas microbiol?gicas e res?duos de agrot?xicos. Foram avaliadas cenouras (DaucuscarotaL.), br?colis (Brassicaoleraceae, var. it?lica), couves (Brassicaoleraceae, var. acephala) e repolhos (Brassicaoleraceae, var. capitata) org?nicas atrav?s da determina??o da umidade, res?duos minerais fixos (cinzas), teor de lip?dios, prote?nas totais, carboidratos, fibras sol?veis e insol?veis, s?lidos sol?veis totais, acidez total, pH, ?cido asc?rbico e res?duos de agrot?xicos. A atividade antioxidante foi baseada no sequestro do radical DPPH e teor de fen?licos totais. Foram realizadas an?lise microbiol?gicas referentes aos indicadores higi?nico-sanit?rios de alimentos e comparadas aos padr?es da legisla??o brasileira. Em complementa??o, foi realizado estudo de avalia??o do o risco cr?nico da ingest?o de pesticidas pela dieta utilizando a Ingest?o Di?ria Te?rica M?xima (IDTM) e a Estimativa de Ingest?o Di?ria (EDI) a partir dos limites m?ximos de res?duos estabelecidos pela legisla??o brasileira e dados de consumo alimentar de crian?as de 10 anos, e valores de res?duos de agrot?xicos detectados em alimentos da agricultura convencional. Os resultados obtidos foram comparados com os limites de seguran?a (Dose di?ria aceit?vel - IDA) em fun??o do peso m?dio da popula??o estudada. Dentre as hortali?as analisadas, a efetividade na capacidade antioxidante foi obtida, em ordem decrescente, pelos br?colis, couves, repolhos e cenouras. Sob o par?metro microbiol?gico, as hortali?as avaliadas apresentaram qualidade higi?nico-sanit?ria satisfat?ria. N?o foram encontrados res?duos de agrot?xicos acima do limite de detec??o, tanto para os autorizados como para aqueles n?o autorizados nas culturas org?nicas analisadas. As hortali?as org?nicas estudadas atendem ao padr?o de qualidade e seguran?a exigidos pela Lei n?11947/2009 devendo ser priorizadas para a alimenta??o escolar. Na avalia??o do risco cr?nico da ingest?o de pesticidas pela dieta a laranja, ma??, tomate, arroz e feij?o foram os alimentos que mais contribu?ram para a ingest?o. Os compostos que apresentaram maior risco foram dicofol, dimetoato, metidationa, pirimif?s met?lico, tetraconazol e carbaril por apresentarem a IDTM maior que a IDA. Palavras-chave: alimentos org?nicos, vegetais, seguran?a alimentar.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-11-28T12:09:02Z No. of bitstreams: 1 2010 - Francisco de Assis Ribeiro.pdf: 1446521 bytes, checksum: 1539b67c73688bab6449f2b66eab899e (MD5) / Made available in DSpace on 2018-11-28T12:09:03Z (GMT). No. of bitstreams: 1 2010 - Francisco de Assis Ribeiro.pdf: 1446521 bytes, checksum: 1539b67c73688bab6449f2b66eab899e (MD5) Previous issue date: 2010-12-09 / This study aimed to evaluate the proposed amendments in different stages of Rhipicephalus sanguineus submitted to arthropod growth regulator (AGR's), pyriproxyfen, in rabbits treated. The study was conducted on the premises of the Laborat?rio de Quimioterapia Experimental em Parasitologia Veterin?ria (LQEPV) from the Departamento de Parasitologia Animal of the Institute of Veterinary, Universidade Federal do Rural do Rio de Janeiro (UFRRJ) located in the municipality of Serop?dica. Growth regulators represent a new category that has been used widely in the control of ectoparasites of small animals. This group has no chemical effect "knockdown", acts slowly and gradually interfering with their growth and development. The AGR's were divided according to their mechanism of action on juvenile hormone analogues, benzoylphenyl ureas - acting in the inhibition of chitin synthesis inhibitors and deposition of chitin. The pyriproxyfen is one of the smallest juvenile hormone analogues marketed as topical treatment for the prophylactic control of fleas on dogs and cats. The experiment was divided into three stages, and in each of 24 rabbits were divided into control group, group treated with 1% pyriproxyfen treated with pyriproxyfen 1.5% and treated with 2% pyriproxyfen. The stage I (stage adult) rabbits were infested with 25 pairs of adult R. sanguineus per rabbit. In stage II (stage larvae) the rabbit were infested with larvae of R. sanguineus at a rate of 2300 larvae / rabbit. In the stage III (nymph stage), the rabbit were infested with 200 nymphs / rabbit. The dose of pyriproxyfen applied in the form "pour-on" at all stages was 10ml/kg body weight, and 0.5 ml in each ear and the rest on the back of the animal. Trials during the parasitic phase were conducted in environmental conditions in the period from February to August 2008, and the stage is not parasitic in controlled laboratory conditions (27 ? 1? C and 80 ? 10% RH in scotophase). We analyzed parameters of the parasitic phase and not parasitic to the larvae, nymphs and adults. The pyriproxyfen caused changes in the biology of R. sanguineus such as decrease in the recovery of evolutionary forms, reduction in weight of the egg mass, increased during the incubation period of eggs, decreased reproductive efficiency rate, inhibition of moulting between stages from larva to nymph, effective in inhibiting reproductive behavior of females and lethargic, but no concentration was observed in action on nymphs. It is concluded that focuses on employee pyriproxyfen at a concentration of 2% was effective in controlling rabbits and promoted behavioral changes in R. sanguineus that indicate the possibility of employment of AGR to control this tick, with the difference in reducing the rate of reinfestation. However, new studies should be carried out on the efficacy of pyriproxyfen to 2% in the control of R. sanguineus when used in dogs. The use of rabbits was a preliminary test to indicate whether or not the activity of pyriproxyfen on the tick R. sanguineus. / A realiza??o deste estudo teve como objetivo avaliar as altera??es morfol?gicas e biol?gicas apresentadas em diferentes fases evolutivas de Rhipicephalus sanguineus submetidos ao regulador de crescimento de artr?podes (AGR?s), piriproxifen, em coelhos tratados. O trabalho foi realizado nas depend?ncias do Laborat?rio de Quimioterapia Experimental em Parasitologia Veterin?ria (LQEPV), pertencente ao Departamento de Parasitologia Animal do Instituto de Veterin?ria da Universidade Federal Rural do Rio de Janeiro (UFRRJ), localizada no munic?pio de Serop?dica. Os reguladores de crescimento representam uma nova categoria que vem sendo empregada amplamente no controle de ectoparasitos de pequenos animais. Este grupo qu?mico n?o apresenta efeito ?knockdown?, atua de forma lenta e gradual interferindo no seu crescimento e desenvolvimento. Os AGR?s foram divididos de acordo com o seu mecanismo de a??o, em an?logos do horm?nio juvenil, benzoilfenil ur?ias - atuando na inibi??o da s?ntese de quitina e inibidores da deposi??o de quitina. O piriproxifen apresenta uma das menores estruturas qu?micas dentre os an?logos dos horm?nios juvenis introduzido no mercado como tratamento t?pico para o controle profil?tico de pulgas em c?es e gatos. O experimento foi dividido em 3 etapas, sendo que em cada uma delas utilizados 24 coelhos, divididos em grupos controle, grupo tratado com piriproxifen a 1%, tratado com piriproxifen a 1,5% e tratado com piriproxifen a 2%. A etapa I (fase de adultos) os coelhos foram infestados com 25 casais de adultos de R. sanguineus por coelho. Na etapa II (fase de larvas) os coelhos foram infestados com larvas de R. sanguineus na raz?o de 2300 larvas/coelho. Na etapa III (fase de ninfa), os coelhos foram infestados com 200 ninfas/coelho. A dose de piriproxifen aplicada sob a forma ?pour-on? em todas as etapas foi de 10mL/kg de peso vivo, sendo 0,5mL em cada orelha e o restante no dorso do animal. As experimenta??es durante a fase parasit?ria foram realizadas em condi??es ambientais, no per?odo de fevereiro a agosto de 2008, e da fase n?o parasit?ria em condi??es controladas de laborat?rio (27 ? 1 ?C e 80 ? 10% UR, em escotofase). Foram analisados par?metros de fase parasit?ria e n?o parasit?ria, para larvas, ninfas e adultos. O piriproxifen causou altera??es na biologia de R. sanguineus tais como: diminui??o na recupera??o das formas evolutivas, diminui??o no peso da massa de ovos, aumento no per?odo de incuba??o dos ovos, diminui??o do ?ndice de efici?ncia reprodutiva, inibi??o do processo de ecdise entre os est?gios de larva para ninfa, efic?cia na inibi??o da reprodu??o das f?meas e comportamento let?rgico, no entanto em nenhuma concentra??o foi observada a??o sobre ninfas. Conclui-se que o piriproxifen empregado na concentra??o de 2% foi eficaz no controle de R. sanguineus em coelhos, promovendo altera??es comportamentais indicando a possibilidade de emprego deste AGR no controle desse carrapato, com a particularidade na redu??o da taxa de reinfesta??o. Entretanto novos estudos necessitam ser realizados visando a efic?cia do piriproxifen a 2% no controle de R. sanguineus quando empregado em c?es. O uso de coelhos foi um teste preliminar para demonstrar a atividade do piriproxifen sobre o carrapato R. sanguineus

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:52Z No. of bitstreams: 5 11.pdf: 1601673 bytes, checksum: 39d0ae1d4c83f9f75b192f272b66de11 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T11:12:29Z (GMT) No. of bitstreams: 5 license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) 11.pdf: 1601673 bytes, checksum: 39d0ae1d4c83f9f75b192f272b66de11 (MD5) / Made available in DSpace on 2015-02-10T11:12:29Z (GMT). No. of bitstreams: 5 license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) 11.pdf: 1601673 bytes, checksum: 39d0ae1d4c83f9f75b192f272b66de11 (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O emprego de pr?ticas silviculturais apropriadas associado ao uso de m?todos de avalia??o nutricional e t?cnicas estat?sticas avan?adas pode ser uma alternativa vi?vel no estabelecimento de crit?rios pr?ticos de caracteriza??o e classifica??o nutricional, al?m de permitir obter informa??es sobre a din?mica de crescimento dentro de povoamentos florestais, enriquecendo estudos sobre a sustentabilidade e produ??o de um ecossistema florestal. O presente trabalho foi dividido em tr?s cap?tulos. Os objetivos foram avaliar os coeficientes de utiliza??o biol?gicos (CUB?s) dos nutrientes pelo eucalipto, a efici?ncia e possibilidade de utiliza??o das redes neurais artificiais (RNA) para obter os CUB?s e estimativas para a biomassa de tronco sob diferentes espa?amentos. O experimento foi instalado em dezembro de 2002 utilizando-se um h?brido de Eucalyptus grandis W. Hill ex Maiden x Eucalyptus camaldulensis Dehnh sobre Latossolo Vermelho-Amarelo em relevo plano a 1097 m altitude. Adotou-se o delineamento em blocos ao acaso sendo estudado, em tr?s blocos, o efeito de cinco espa?amentos de plantio: T1 - 3,0 x 0,5 m; T2 - 3,0 x 1,0 m; T3 - 3,0 x 1,5 m; T4 - 3,0 x 2,0 m e T5 - 3,0 x 3,0 m. Realizou-se o invent?rio florestal cont?nuo nas idades de 48, 61, 73, 85 e 101 meses. Em cada ?rvore-amostra por unidade experimental na ?ltima idade foram: quantificada a biomassa; mensurada a ?rea e per?metro foliar, ?rea foliar espec?fica e realizada a an?lise qu?mica de N, P, K, Ca, Mg e S para amostras composta (ao longo do fuste) e simples (regi?o do DAP) dos componentes. Os resultados foram submetidos ? ANOVA, regress?o e a aplica??o das RNA. A modelagem por redes neurais artificiais demonstrou-se adequada para estimar a produ??o de biomassa de tronco em fun??o da idade sob diferentes espa?amentos, utilizando o DAP e per?metro foliar como vari?veis preditoras. N?o houve grande varia??o da efici?ncia de uso dos nutrientes entre os espa?amentos, principalmente para o tronco. A rede neural artificial foi eficiente em estimar a efici?ncia de uso dos nutrientes. A modelagem por redes neurais artificiais utilizando-se apenas amostra da casca na regi?o do DAP demonstrou ser adequada para a estimativa do coeficiente de utiliza??o biol?gico do tronco. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The use of appropriate silvicultural practices associated with the use of methods of nutritional assessment and advanced statistical techniques can be a viable alternative to establish practical criteria characterization and classification of nutritional status, and allows information on the dynamics of growth in forest stands, enriching studies on the sustainability and production of a forest ecosystem. This work was divided into three chapters. The objectives were assess the coefficient of biological use (CUB's) of nutrients by eucalyptus trees, the efficiency and possible use of artificial neural networks (RNA) for the CUB's and biomass trunk under different spacings. The research plots was installed in december 2002 using a hybrid of Eucalyptus grandis W. Hill ex Maiden X Eucalyptus camaldulensis Dehnh. The statistical design was randomized blocks being studied, in three blocks, the effect of different planting spacings: T1???3,0?x?0,5?m, T2???3,0?x?1,0?m, T3???3,0?x?1,5?m, T4???3,0?x?2,0?m e T5???3,0?x?3,0?m. Data collection was carried out at ages 48, 61, 73, 85 and 101 months. In each sample-tree per experimental unit in the last age were: quantified biomass; measured leaf area, leaf perimeter, specific leaf area and chemical analysis of N, P, K, Ca, Mg and S for composite samples (along the stem) and simple samples (the region of the DAP) of components. Statistical analysis of the data consisted of ANOVA, regression and application of RNA. The modeling by artificial neural networks demonstred to be adequate to estimate the biomass of the trunk in relation to age at different spacings, using the DBH and perimeter leaf as predictors variables. There wasn't wide variation in efficiency use nutrient among spacings, especially for the trunk. The artificial neural network was effective in estimating the efficiency of nutrient use. The modeling by artificial neural networks using only sample in the DAP region proved to be adequate for estimating the coefficient of biological use of stem.