This study describes the technique and procedures used for the simultaneous determination of elements involved in Instrumental Neutron Activation Analysis, applied to some geological samples as a sensitive and non-destructive tool. Using Isotopic Neutron Source, the delayed gamma-rays emitted due to neutron capture have been applied for the investigation of the elemental constituents and concentrations of major, minor and trace elements in such samples. The experimental investigations were carried out at the scale of researcher's practices at the chosen site by measuring soil/rock nutrient contents from hydrologically isolated farmland/site plots. Using detailed sampling procedures with special precautions, against contaminations, to yield meaningful results, soil/rock samples have been collected from selected areas of East Gojjam, pulverized, homogenized and prepared for irradiation. The samples were properly prepared together with known standards of potassium iodide or cupric sulphate or arsenic trioxide (one /or both at a time), and simultaneously irradiated in to isotopic neutron ux in the same irradiation position. After activation, the samples were subjected to gamma-ray spectrometry, using a high-purity germanium detection system and computerized multichannel analyzer. The gamma-ray spectra from the irradiated samples were measured by high resolution gamma-ray spectrometry with a calibrated germanium detector. Both qualitative and quantitative approach to data collection and analysis were used in order to gain insight into what should be acceptable to the community. The results obtained have a practical interest in view of possible applications to the technology of extraction and exploration of a variety of industrial, metallic, cement minerals, and geothermal energy and coal deposits. These results tend to agree with the lowest values reported in the literature, and the analytical precision is su cient for the determination of the standard deviation of the distribution of all elements in East Gojjam and these results were brie y discussed within the text of this research work. In carrying out the analysis, the best and most convenient method being the Instrumental and /non-destructive Neutron Activation Analysis was adopted, and NAA has matured and attained analytical competence providing not only rapid, quantitative, qualitative, simultaneous, multi􀀀element analysis but also crucial validation support to programmes using di erent analytical techniques. This method of analysis is generally multi-element and experimental conditions can be designed to be non􀀀destructive to the sample, and it plays a leading role among analytical techniques in the eld of environmental research related to human, animal and plant health. Studies of di erent radionuclide and trace elements in the environmental samples are very important for health physics, research and education. Many forms of elements are possible in environmental samples which may be hazardous for human being, animals and also plants. Most of them have the potential for both benefcial and harmful effects / Environmental Sciences / D. Phil. (Environmental Science)

Legislative pressures are being brought to bear on South African employers to demonstrate that occupational assessment is scientifically valid and culture-fair. The development of valid and reliable performance-based assessment tools will enable employers to meet these requirements. The general aim of this research was to validate a performance-based assessment battery for the placement of sales representatives. A literature survey examined alternative assessment measures and methods of performance measurement, leading to the conclusion that the combination of the work sample as a predictor measure and the managerial rating of performance as a criterion measure offer a practical and cost-effective assessment process to the sales manager. The empirical study involved 54 sales persons working for the Commercial division of an oil marketing company, selling products and services to the commercial and industrial market. By means of the empirical study, a significant correlation was found between performance of sales representatives in terms of the performance-based assessment battery for the entry level of the career ladder and their behaviour in the field as measured by the managerial performance rating instrument. The limitations of the sample, however, prevent the results from being generalised to other organisations. / Industrial and Organisational Psychology / M.A. (Industrial Psychology)

The topic of my diploma thesis draws on my bachelor thesis, which described combustion products of selected substances in the complete combustion. The diploma thesis focused on the incomplete combustion in the same substances to make a comparison possible. In the chapter on the substances selected for burning, the substances were described theoretically first. Further, the burning was carried out, the products that came into being were collected into collection bags and sent to the laboratory of the Institute of Population Protection in Lázně Bohdaneč to be analysed. After receiving the records all possible effects on human health were carried out, and the results were compared with those of the bachelor thesis. The analyses showed that carbon monoxide and sulphur dioxide appeared in all analyses, while the remaining substances differed to a minimum extent, however, they are in much higher concentrations than in the perfect combustion. I added two more substances that had not been in my bachelor thesis to those that were burnt, but in the course of two years their application became a common practice, and they play an increasingly more significant role in our life. The task of the chapter dealing with the detection technique was to find out and describe the possibilities of the commander in detecting the combustion products directly on the spot of the actual operation in the shortest possible time, to enable him to propose the protection of the firemen, and possibly to establish the possibilities of taking samples, transport to the laboratory, conducting a laboratory analysis and establishing the approximate time when he could obtain the first sampling results. All of this was focused on the possibilities of the Fire Rescue Service of the Region of South Bohemia (HZS JčK). The next chapter concerned their colleagues of the Fire Rescue Service of the Region of South Bohemia in České Budějovice, in which a questionnaire investigation was focused on them, identical with that of my bachelor thesis. As I had succeeded in including the results of my bachelor thesis into a training course, I wondered whether the knowledge would improve or not. After a comparison with the results from my bachelor thesis with the new ones the conclusions turned out to be favourable, and suggested in which way the training courses - not only for the professional units - should proceed. The results of the new questionnaire investigation, which showed an improvement, should form a basis of a campaign focusing on the non-professional public, which should be acquainted with what they breathe in the event that they burn vast variety of waste. I believe that results would be achieved even here in the form of a deeper knowledge and a better quality of the air we breathe.

Made available in DSpace on 2016-06-02T20:21:30Z (GMT). No. of bitstreams: 1 5005.pdf: 2296978 bytes, checksum: 77a669d7d6cbf4916130d05c32dc1e39 (MD5) Previous issue date: 2013-02-28 / Universidade Federal de Minas Gerais / The loss and fragmentation of habitat due to intensive human intervention are the main threats to natural populations. Species with low density and large home range, like felids, are the most threatened species by these changes. In an attempt to minimize this impact, detection of population density and genetic characterization are necessary to propose conservation measures. Thus, the main objective of this study was to characterize the populations of two species of felines, cougars (Puma concolor) and ocelots (Leopardus pardalis) of Caetetus Ecological Station (EEC - SP, one of the last remnants of Atlantic Forest within the state of São Paulo), about their demographic and genetic characteristics from non-invasive samples (feces and hairs).We collected the samples on EEC tracks and identified the species, individualized each sample, sexed each individual and calculated the genetic diversity of the population using molecular markers. Abundance was estimated from the capture-recapture historic, with opened and closed population models. We identified 17 samples of feces cougar and 12 of ocelot. Of these samples, six individuals were individualized as cougar and five as ocelot, these numbers represent the minimum population sizes for the entire sample period (18 months). The values of abundance and density estimated using the model of closed population was more similar to that found in genetic individualization, five individuals for each species and densities of 4.92/100 km2 (P. concolor) and 19.51/100 km2 (L. pardalis). The genetic diversity of the two species was lower than that from other studies, probably due the landscape´s fragmentation, which reduces the gene flow with others populations. Also, the genetic diversity for L. pardalis was lower than P. concolor, which is possibly related to the ocelot behavior of avoid opened and disturbed areas, which can reduce the potential for gene flow. Furthermore, we also observed structure of P. concolor from EEC with populations from other locations, but we also identified gene flow, including relatedness. Thus, the results of genetic diversity and demographics demonstrate the importance of the Ecological Station Caetetus for these species and also underscores the importance of establishing measures to enable the viability of its populations over long term, as facilitating gene flow with individuals from others locations. / A perda e fragmentação do habitat, decorrentes da intensa intervenção antrópica, estão entre as principais ameaças às populações naturais. Espécies com baixa densidade e grandes áreas de vida, como os felinos, são ainda mais prejudicadas por essas mudanças. Na tentativa de minimizar esse impacto, a detecção da densidade populacional e a caracterização genética são necessárias para que medidas de conservação sejam propostas. Nesse sentido, o objetivo principal deste trabalho foi caracterizar populações de duas espécies de felinos, onça-parda (Puma concolor) e jaguatirica (Leopardus pardalis) da Estação Ecológica dos Caetetus (EEC SP, um dos últimos remanescentes de Mata Atlântica no interior do estado de São Paulo), quanto às suas características demográficas e genéticas, a partir de amostras não invasivas (fezes e pelos). Coletamos as amostras nas trilhas da EEC, das quais pudemos identificar as espécies, individualizar, sexar cada indivíduo e calcular a diversidade genética da população utilizando marcadores moleculares. A abundância foi estimada a partir do histórico de captura-recaptura com modelos de população aberta e fechada. Identificamos geneticamente 17 amostras de fezes de onça-parda e 12 de jaguatirica. Dessas amostras, individualizamos seis indivíduos de onça-parda e cinco de jaguatirica, sendo esses os tamanhos populacionais mínimos para todo o período de amostragem (18 meses, entre dezembro de 2010 a maio de 2013). Os valores de estimativa de abundância e densidade utilizando o modelo de população fechada foram mais próximos ao encontrado na individualização genética, sendo cinco indivíduos para cada espécie e densidades de 4,92/100 km2 (P. concolor) e 19,51/100 km2 (L. pardalis). A diversidade genética encontrada para as duas espécies foi menor quando comparada com outros trabalhos, provavelmente ao menor fluxo gênico com outras populações devido à fragmentação da paisagem. Além disso, a diversidade genética encontrada para L. pardalis foi menor quando comparada a P. concolor, possivelmente relacionado ao hábito da espécie em evitar áreas mais abertas e antropizadas, o que pode reduzir o potencial de fluxo gênico. Já para P. concolor foi encontrada estruturação com populações de outras localidades, mas também identificamos fluxo gênico, inclusive com relações de parentesco. Dessa forma, os resultados obtidos de demografia e diversidade genética demostram a importância da Estação Ecológica dos Caetetus para essas espécies e também ressalta a importância da criação de medidas que permitam a viabilidade de suas populações a longo prazo, como as que facilitem fluxo gênico com indivíduos de outras localidades.

Made available in DSpace on 2014-06-11T19:28:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-06-20Bitstream added on 2014-06-13T20:18:17Z : No. of bitstreams: 1 viana_rs_me_jabo.pdf: 161687 bytes, checksum: f5ac1d697b173d61681a955dc7cb0f50 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste experimento foi avaliar as variáveis tecnológicas e o efeito de maturadores químicos na cultura da cana-de-açúcar no final de safra, e a ação na erradicação da soqueira em áreas de reforma do canavial visando a utilização da técnica do plantio direto ou cultivo mínimo, na cultivar RB72454 em cana soca 4o corte. O delineamento experimental utilizado foi em blocos casualizados, em esquema de parcelas subdivididas, sendo os tratamentos principais constituídos pela: testemunha, glifosato aplicado nas dosagens de 0,4, 3,0 e 6,0 L de produto comercial por hectare (p.c.ha-1), e sulfometuron-metil (aplicado na dosagem de 20 g p.c ha-1) e os tratamentos secundários constituíram-se das diferentes épocas de amostragens aos 0, 11, 18, 28, 35, 43 dias após a aplicação (daa) ocorrido em 21/10/05. Foram avaliados em cada amostragem o Brix , Pol, Pureza do caldo, AR (%), Fibra cana (%). Aos 62 dias após a colheita e aos 290 (dac) foram realizadas as contagens do número de perfilhos e a altura de planta. Concluiu-se que a aplicação destes tratamentos como maturadores químicos promoveram aumento significativo sobre as variáveis tecnológicas da planta como: Brix cana(%), Pol cana(%), TPH, e ATR (Kg t-1) ao longo das épocas de amostragens destacando-se o glifosate 0,4 L de p.c ha-1 e sulfometuron-metil 20g ha-1 aos 28 dias após a aplicação, onde houve maior retorno econômico por hectare. Os tratamentos realizados não afetaram os compostos fenólicos, acidez total e acidez volátil. O emprego do glifosato (0,4 L de p.c ha-1), não afetou a brotação da soqueira e o numero de perfilhos por metro; e a altura de plantas quando comparado com a testemunha aos 62 dias após a colheita (dac). Nos tratamentos com glifosato (6,0 e 3,0 L de p.c ha-1) não houve a erradicação da planta embora estas doses tenham afetado negativamente o desenvolvimento inicial da soqueira... / The objective of this work was to evaluate chemical and technological characteristics and study the effect of chemical ripeners in the sugarcane variety RB72454, at the end of the harvest season, and ratoon eradication of the, on a sugarcane reformed area, aiming the use of no-tillage or minimum tillage. The experimental design was arranged in randomized blocks with split split-plots, being the main treatments: Control; Roundup (glyphosate), at a dosage of 0.4 L of commercial product per hectare; Roundup (glyphosate), at a dosage of 3.0 L of commercial product per hectare; Roundup (glyphosate), at a dosage of 6.0 L of commercial product per hectare; Curavial (sulphometuron-methyl) at a dosage of 20 g of commercial product per hectare. The secondary treatments were sampling dates, respectively: 0 days after application (d.a.a.); 11 d.a.a; 18 d.a.a; 28 d.a.a.; 35 d.a.a. and 43 d.a.a. The following variables were measured: number of tillers per linear meter and plant structure at 62 and 290 days after harvest. As result of this study, the application of these treatments as chemical ripeners promoted a significant increase over the technological variables of the plant as: cane Brix (%), cane Pol (%), TPH, cane fiber (%) and ATR along the evaluated sampling seasons, emphasizing glyphosate at a dosage of 0.4 L of commercial product per hectare and sulphometuron-methyl at a dosage of 20 g of commercial product per hectare. Relatively to seasons, the best results were accomplished in the 4th sampling season, 28 days after application, where there was a better economic return per hectare. The use of the chemical ripeners, in the sugarcane crop, did not affect some important technological characteristics, for the industry quality samples, such as: phenolic compounds, total acidity, and volatile acidity. The precipitation that occurred during the sampling period (43 daa) benefited the reestablishment ...(Complete abstract, click electroni access below)

Made available in DSpace on 2016-06-02T19:05:37Z (GMT). No. of bitstreams: 1 2176.pdf: 7940164 bytes, checksum: 98727460db08f23e4e24aa4a4b695d4d (MD5) Previous issue date: 2008-08-28 / This work presents a Virtual Reality environment dedicated to the analysis of tomographic images of Soil Science. Its architecture uses models proceeding from a volumetric (3-D) reconstruction algorithm, summed with several graphics processes of manipulation and visualization, in a way to provide immersion and interaction of the user with the virtual scene. Its validation was performed based on a case study involving the analysis of the porosity of the agricultural soil samples, which presents preferential paths for the water and solute flow (fingering). Results illustrate the consistent verification of the preferential paths of the agricultural soil samples, analyzed based on the developed environment. / Este trabalho apresenta um ambiente de Realidade Virtual dedicado à análise de imagens tomográficas da Ciência do Solo. Sua arquitetura utiliza modelos provenientes de um algoritmo de reconstrução volumétrica (3-D) adicionado a diversos processos gráficos de manipulação e visualização, de tal forma a possibilitar imersão e interação do usuário com a cena virtual. Sua validação foi realizada com base em um estudo de caso envolvendo análise de porosidade de amostras de solos agrícolas, os quais apresentam caminhos preferenciais para o fluxo de água e solutos (fingering). Resultados ilustram a verificação consistente dos caminhos preferenciais das amostras de solos agrícolas, analisadas com base no ambiente desenvolvido.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The aimed of this work was to study the adjustment of classical non linear models, Von Bertalanffy, Brody, Gompertz, Logistic to growing records of buffaloes of Murrah breed, raised on lowlands in the State of Rio Grande do Sul, and to estimate covariance components by Bayesian focus, for growing curve parameters with biological interpretation. In paper 01 there were studied the adjustment of the classical non linear models already mentioned to growing data for a group of 66 buffaloes females, born from 1982 to 1989, sired by three males and 38 females. There were evaluated the traits Asymptotic weight (A) and Maturity rate (K). The total pair of records weight-age was 26 weighting/female and 1,638 observations. The criterions utilized to select the model that better adjust the growing curve were: asymptotic standard deviation (DPA); the determination coefficient (R2); the residual absolute average deviation (DMA) and asymptotic index (AI). It was concluded that all the models overestimated the birth weight (PN) in bigger or smaller magnitude. In crescent order, the models Von Bertalanffy, Gompertz, Logistic and Brody overestimated PN by 28.55; 32.74; 42.70 and 43.45 kg, respectively. The Logistic model underestimated A (-2.09 kg) and Von Bertalanffy, Gompertz, and Brody overestimated A in crescent order 8.04, 17.7 and 280.33 kg, respectively. Based on the adjustment criterions and in the predicted curves behavior, the Gompertz model, followed by Logistic and Von Bertalanffy were the best adjustment. In Paper 2 there were studied the adjustments of the same models and for the same traits in Paper 01 for a group of 67 buffaloes, born from 1982 to 1989 sired by three males and 42 females. It was concluded that all the models overestimated PN. Von Bertalanffy and Brody models overestimated A, and Gompertz and Logistic models underestimated it. The smaller DPA was obtained by Brody model characterizing a bigger R2 but this model presented the bigger DMA. Considering all the criterions, Gompertz model presented the best adjustment followed by Logistic and Von Bertalanffy. It is suggested do not use Brody model to describe the growing curve for animals of Murrah breed raised in the conditions of this work. In Paper 3 there were estimated covariance components and genetic parameters by Bayesian focus, using the Family BLUPF90, for the parameters A and K, estimated by Gompertz model and adopting an animal model. The heritability coefficients presented elevated values for A and for K (0.57 and 0.34, respectively), indicating that selection can be used as an instrument for change the curve shape of this population. However, the use of this information must be done with to much attention because these traits are negatively correlated. In this case a restricted selection index should be used with more success. / Objetivou-se com este trabalho estudar o ajuste de modelos não-lineares Von Bertalanffy, Brody, Gompertz e Logístico aos dados de crescimento de búfalos(as) da raça Murrah criados em terras baixas no Estado do Rio Grande do Sul e estimar os componentes de (co)variâncias, sob enfoque Bayesiano, para os parâmetros da curva de crescimento com interpretação biológica. No Capítulo 01 foram estudados os ajustes dos modelos não-lineares, supracitados, aos dados de crescimento para um grupo de 63 búfalas, nascidas no período de 1982 a 1989, filhas de três reprodutores e 38 matrizes. Foram avaliadas as características Peso Assintótico (A) e a Taxa de Maturação (K). Os pares de registro peso-idade totalizaram 26 pesagens/fêmea e 1.638 observações. Os critérios utilizados para selecionar o modelo de melhor ajuste à curva de crescimento foram: desvio padrão assintótico (DPA); o coeficiente de determinação (R2); o desvio médio absoluto dos resíduos (DMA) e o índice assintótico (IA). Em ordem crescente, os modelos Von Bertalanffy, Gompertz, Brody e Logístico superestimaram o PN em 28,55; 32,74; 42,70 e 43,45 kg, respectivamente. O modelo Logístico subestimou o A (-2,09 kg) e os demais modelos (Gompertz, Von Bertalanffy e Brody) superestimaram este parâmetro, em: 8,04; 17,7 e 280,33 kg, respectivamente. Com base nos critérios de ajuste e na visualização das curvas preditas, o modelo Gompertz, seguido dos modelos Logístico e Von Bertalanffy seriam os de melhor ajuste. No Capítulo 02 estudaram-se os ajustes dos mesmos modelos para as mesmas características referenciados no Capítulo 01, aos dados de crescimento para um grupo de 64 búfalos, nascidos no período de 1982 a 1989, filhos de três reprodutores e 42 matrizes. Concluiu-se que todos os modelos superestimaram o PN. Os modelos Von Bertalanffy e Brody superestimaram o A em 14,7 e 167,22 kg, respectivamente, ao passo que os modelos Gompertz e Logístico o subestimaram em 5 e 13 kg, respectivamente. Considerando todos os critérios, o modelo Logístico apresentou o melhor ajuste seguido dos modelos Gompertz e Von Bertalanffy. Sugere-se que o modelo Brody não seja utilizado para descrever a curva de crescimento de búfalos(as) da raça Murrah, criados sob as condições deste trabalho. No Capítulo 03, foram estimados os componentes de (co)variâncias e os parâmetros genéticos sob enfoque Bayesiano, utilizando os programas da Família BLUPF90, dos parâmetros A e K, estimados pelo modelo Gompertz, adotando um modelo animal. Os coeficientes de herdabilidade foram de elevada magnitude tanto para A quanto para K (0,57 e 0,34, respectivamente), indicando que a seleção pode ser usada como instrumento para alterar a forma da curva de crescimento desses animais. Entretanto, o uso dessas informações deve ser feito com grande cautela, uma vez que as características a serem trabalhadas na modificação do formato da curva de crescimento são negativamente correlacionadas, além também, da grande variabilidade das estimativas. Neste caso, os índices de seleção restritos poderiam ser utilizados com maior sucesso.

Submitted by Milena Rubi (milenarubi@ufscar.br) on 2017-06-01T17:00:50Z No. of bitstreams: 1 MORAES_Rodrigo_2016.pdf: 42751751 bytes, checksum: 25891a495567a6bce1d41328abf03d12 (MD5) / Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-06-01T17:00:58Z (GMT) No. of bitstreams: 1 MORAES_Rodrigo_2016.pdf: 42751751 bytes, checksum: 25891a495567a6bce1d41328abf03d12 (MD5) / Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-06-01T17:01:04Z (GMT) No. of bitstreams: 1 MORAES_Rodrigo_2016.pdf: 42751751 bytes, checksum: 25891a495567a6bce1d41328abf03d12 (MD5) / Made available in DSpace on 2017-06-01T17:01:09Z (GMT). No. of bitstreams: 1 MORAES_Rodrigo_2016.pdf: 42751751 bytes, checksum: 25891a495567a6bce1d41328abf03d12 (MD5) Previous issue date: 2016-11-25 / Não recebi financiamento / The APIs are becoming increasingly more popular and they play a important role in software development. However, many APIs are large and complex that makes them hard to learn. Among avaliable resources to learn to use an API, there are the code samples. A code sample can be used to demonstrate to a programmer how to use API’s components together to attain a specific goal. But, code sample are static and they haven’t information about how to adapt the code snippet shown as example to programmer’s context. Tools have been proposed to assist the programmers in finding and adapting code snippets that may be useful for a programming task. A specific type of these tools are the code template tools. Code templates are code snippets manually registered containing integration directives. The integration directives instruct the code template tool on how to adapt a code snippet to programmer’s context. In this work, code snippet tools are investigated and it is proposed a code template tool called IPS. It presents some novelties in relation to other code template tools. In the IPS, a code template can be associated to a Java class and the IPS has a code template recommender that is automatically updated as the source code is edited by the programmer. Also it is proposed the role parameters, a new concept for the parameters of code templates that extends the concept of the parameters associated to a type which is present in current code template tools. The role parameters has the objective of accepting arguments that would at first be incompatible with a specific type, but that obey a expected pattern. / As APIs têm se tornado cada vez mais populares e elas têm um papel fundamental no desenvolvimento de software. No entanto, muitas APIs são grandes e complexas o que torna a aprendizagem delas difícil. Entre os recursos disponíveis para se aprender a utilizar uma API, há os exemplos de código. Um exemplo de código pode demonstrar a um programador como componentes de uma API podem ser utilizados juntos para atingir um determinado objetivo. Porém, exemplos de código são estáticos e não contêm informações de como adaptar o trecho de código apresentado como exemplo para o contexto do programador. Ferramentas têm sido propostas para auxiliar os programadores a encontrarem e adaptarem trechos de códigos que possam ser úteis para uma tarefa de programação. Um tipo específico dessas ferramentas são as ferramentas de templates de código. Templates de código são trechos de códigos cadastrados manualmente contendo diretivas de integração. As diretivas de integração instruem a ferramenta a como adaptar um trecho de código para o contexto do programador. Neste trabalho, ferramentas de trechos de código são investigadas e é proposta uma ferramenta de template de código denominada IPS. Ela apresenta novidades em relação às outras ferramentas de templates de código. No IPS, um template de código pode ser associado a uma classe Java e o IPS possui um recomendador de templates de código que é automaticamente atualizado conforme o código fonte é editado pelo programador. Também é proposto os parâmetros do tipo role, um novo conceito que estende o conceito dos parâmetros associados a um tipo que está presente nas ferramentas de templates de código atuais. Os parâmetros do tipo role têm como objetivo aceitar argumentos que seriam a princípio incompatíveis com um determinado tipo, porém que sigam um determinado padrão esperado.

Orientador: Miguel Angelo Mutton / Banca: Marcos Omir Marques / Banca: Carlos Alberto Mathias Azania / Resumo: O objetivo deste experimento foi avaliar as variáveis tecnológicas e o efeito de maturadores químicos na cultura da cana-de-açúcar no final de safra, e a ação na erradicação da soqueira em áreas de reforma do canavial visando a utilização da técnica do plantio direto ou cultivo mínimo, na cultivar RB72454 em cana soca 4o corte. O delineamento experimental utilizado foi em blocos casualizados, em esquema de parcelas subdivididas, sendo os tratamentos principais constituídos pela: testemunha, glifosato aplicado nas dosagens de 0,4, 3,0 e 6,0 L de produto comercial por hectare (p.c.ha-1), e sulfometuron-metil (aplicado na dosagem de 20 g p.c ha-1) e os tratamentos secundários constituíram-se das diferentes épocas de amostragens aos 0, 11, 18, 28, 35, 43 dias após a aplicação (daa) ocorrido em 21/10/05. Foram avaliados em cada amostragem o Brix , Pol, Pureza do caldo, AR (%), Fibra cana (%). Aos 62 dias após a colheita e aos 290 (dac) foram realizadas as contagens do número de perfilhos e a altura de planta. Concluiu-se que a aplicação destes tratamentos como maturadores químicos promoveram aumento significativo sobre as variáveis tecnológicas da planta como: Brix cana(%), Pol cana(%), TPH, e ATR (Kg t-1) ao longo das épocas de amostragens destacando-se o glifosate 0,4 L de p.c ha-1 e sulfometuron-metil 20g ha-1 aos 28 dias após a aplicação, onde houve maior retorno econômico por hectare. Os tratamentos realizados não afetaram os compostos fenólicos, acidez total e acidez volátil. O emprego do glifosato (0,4 L de p.c ha-1), não afetou a brotação da soqueira e o numero de perfilhos por metro; e a altura de plantas quando comparado com a testemunha aos 62 dias após a colheita (dac). Nos tratamentos com glifosato (6,0 e 3,0 L de p.c ha-1) não houve a erradicação da planta embora estas doses tenham afetado negativamente o desenvolvimento inicial da soqueira ...(Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The objective of this work was to evaluate chemical and technological characteristics and study the effect of chemical ripeners in the sugarcane variety RB72454, at the end of the harvest season, and ratoon eradication of the, on a sugarcane reformed area, aiming the use of no-tillage or minimum tillage. The experimental design was arranged in randomized blocks with split split-plots, being the main treatments: Control; Roundup (glyphosate), at a dosage of 0.4 L of commercial product per hectare; Roundup (glyphosate), at a dosage of 3.0 L of commercial product per hectare; Roundup (glyphosate), at a dosage of 6.0 L of commercial product per hectare; Curavial (sulphometuron-methyl) at a dosage of 20 g of commercial product per hectare. The secondary treatments were sampling dates, respectively: 0 days after application (d.a.a.); 11 d.a.a; 18 d.a.a; 28 d.a.a.; 35 d.a.a. and 43 d.a.a. The following variables were measured: number of tillers per linear meter and plant structure at 62 and 290 days after harvest. As result of this study, the application of these treatments as chemical ripeners promoted a significant increase over the technological variables of the plant as: cane Brix (%), cane Pol (%), TPH, cane fiber (%) and ATR along the evaluated sampling seasons, emphasizing glyphosate at a dosage of 0.4 L of commercial product per hectare and sulphometuron-methyl at a dosage of 20 g of commercial product per hectare. Relatively to seasons, the best results were accomplished in the 4th sampling season, 28 days after application, where there was a better economic return per hectare. The use of the chemical ripeners, in the sugarcane crop, did not affect some important technological characteristics, for the industry quality samples, such as: phenolic compounds, total acidity, and volatile acidity. The precipitation that occurred during the sampling period (43 daa) benefited the reestablishment ...(Complete abstract, click electroni access below) / Mestre

Made available in DSpace on 2014-10-09T12:44:19Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:57:12Z (GMT). No. of bitstreams: 1 06901.pdf: 9310315 bytes, checksum: 34ec97737bf373b58a295f330b6aa935 (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP