Thèses sur le sujet « Gramine »
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Gherbovet, Olga. « Synthèse d'hybrides vinblastine-phomopsine ». Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00925057.
Texte intégralMarcq, Valérie. « Synthese et evaluation de succinyltryptophanamides inhibiteurs de metalloproteinases matricielles (doctorat : chimie organique des substances naturelles) ». Reims, 1999. http://www.theses.fr/1999REIMP203.
Texte intégralDevaraj, Karthik. « Ruthenium-catalyzed C-H Functionalization of (Hetero)arenes ». Doctoral thesis, Uppsala universitet, Organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-310998.
Texte intégralKeith, Adam J. « Ion-tagged Phosphines for Catalytic Reactions in Ionic Liquids ». University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1407960203.
Texte intégralChahatha, Hisham El. « Étude de quelques aspects écologiques des relations nutritionnelles entre graminées et légumineuses en présence d'un champignon endomycorhizien en culture pure et mixte (compétition, symbiose, pollution) ». Nancy 1, 1991. http://www.theses.fr/1991NAN10181.
Texte intégralOliveira, Amanda Prates. « Produção de novilhas utilizando pastagens e confinamento / ». Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/104889.
Texte intégralAbstract: This study aimed to evaluate different strategies for finishing heifers in pasture and feedlot system. In the first experiment, the heifers performance was evaluated during the wet to dry season period in a continues stocking grazing system with different forage allowance associated to supplementation. The second experiment was conducted to evaluate supplementation during the dry season on the heifers performance kept in a pasture stockpiled at the end of the wet season. In the third study evaluate the performance of feedlot heifers fed diets with two different roughage: concentrate ratios, containing monensin (MS) or sodium bicarbonate (BS) in order to evaluate the production systems of young females for slaughter. The wet season experiment was conducted according a randomized block design in a factorial 3 x 2 (three forage allowance levels 1.5, 2.0 and 2.5 kg of DM/ kg BW, and two supplementation levels (0.0 and 0.3% BW) with two replications (pastures) Significant difference between forage allowance was observed. The highest forage allowance (2.5 kg of DM/kg BW) resulted in highest average daily gain (ADG 0.605 kg/animal / day). Beef heifers supplementation with 0.3% BW allows additional ADG of the 200 g/ day. In the dry season experiment the design was a randomized block with eight replicates (heifers) in a 2 x 2 factorial, with repeated measures over time. The dry season treatments were arranged considering the two quantities of supplement provided during the wet period, combining with two quantities of supplement and protein content (0.4% BW with 25.3% CP, 0.2% of the PC 52, 1% CP). Supplementation with 0.4 and 0.2% BW resulted in relatively high daily weight gain (0.431 and 0.268 kg/ day), respectively. The animals ADG were directly related to the green leaves allowance. In the feed lot experiment were evaluated diets with 50% and 80% of concentrate, associated with sodium ... (Complete abstract click electronic access below)
Orientador: Ricardo Andrade Reis
Coorientador: Telma Teresinha Berchielli
Banca: Valdo Rodrigues Herling
Banca: Marco Antonio Alvares Balsalobre
Banca: Flávio Dutra de Resende
Banca: Alexandre Amstalden Moraes Sampaio
Doutor
Kindomihou, Missiako V. « Silicification des graminées tropicales : variation entre espèces, influence des conditions de croissance et relations avec la structure foliaire ». Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210932.
Texte intégralThe present study examines the variation of the silica accumulation of tropical grass species on the ecological and evolutionary point of view. The review of works examining the extent of the variation of the silica content in grasses identifies three groups of factors influencing the grass silicification, in particular the genetic factors (difference in the capacity of root absorption, anatomy and foliar ecophysiological features), endogenous factors (phenology, organs) and the growth conditions. The experimental approach focused the influence of certain conditions of growth on the silica content (defoliation, moisture, substrate fertility). The results confirm the influence of the defoliation and the substrate fertility on the silica accumulation, but underline well the complexity of the action of these factors which results in particular in differences in response between species. These results suggest that contradiction between published works with regard to the inducible character or not of the silica accumulation are due to some extent to the species*defoliation interaction, and a great sensitivity of the results to the conditions for application of defoliation. Variations of the silica content (intrinsic and induced by the growth conditions) relating to the variations of structural and functional characters (specific leaf area, water content, foliar anatomy, etc.) showed correlations which are not entirely constant through all the tests. They are significantly positive with soluble ashes under all the examined conditions, but negative with carbon in condition of defoliation. With the water content, they are positive in conditions of defoliation, but change sign in conditions of phospho-nitrogenized fertilization. This negative correlation with the water content is consistent at the same time in blades and sheaths in interspecific comparison. This difference in the structure of the correlations results at the same time from the effects of sampling and the more or less large extent of the range of the silica contents swept by the various examined species. Pennisetum unisetum is richest in silica and sclerenchyma and which weighs disproportionately in the analysis of correlations. The results do not give a very clear support for the assumption according to which silica can replace the carbonaceous compounds like material of support.
Doctorat en sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
Wyand, Rebecca Alice. « Molecular evolution of Blumeria graminis ». Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368390.
Texte intégralChen, Dong Fang. « Genetic transformation in the Gramineae ». Thesis, Open University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293321.
Texte intégralSalo, E. (Essi). « Ohessa ja ohella -grammien semantiikka ». Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201606022134.
Texte intégralMeriläinen, J. (Johanna). « Taitava kiekon kanssa:kanssa-grammin polysemiaa ». Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201510082037.
Texte intégralMd, Illias Rosli. « Mandelate dehydrogenases from Rhodotorula graminis ». Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/11853.
Texte intégralRobertson, Douglas J. « Mandelate dehydrogenases from Rhodotorula graminis ». Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/12863.
Texte intégralOliveira, Amanda Prates [UNESP]. « Produção de novilhas utilizando pastagens e confinamento ». Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/104889.
Texte intégralConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O presente trabalho teve como objetivos avaliar diferentes estratégias para terminação de novilhas. No período de transição águas-secas, avaliou-se o desempenho de novilhas submetidas à pastejo contínuo com diferentes ofertas de forragem associada ao fornecimento de suplementos. O segundo experimento teve como objetivo avaliar os efeitos da suplementação durante o período seco sobre o desempenho de novilhas mantidas em pastagem diferida nas águas. E no terceiro estudo objetivou-se avaliar o desempenho de novilhas em confinamento recebendo dietas com duas relações volumoso:concentrado contendo monensina sódica (MS) ou bicarbonato de sódio (BS) com vistas a avaliar sistemas de produção de fêmeas jovens para abate. No experimento de águas, o delineamento utilizado foi o de blocos casualizados, com 2 repetições, num fatorial 3 x 2 (três ofertas de forragem 1,5; 2,0 e 2,5 kg de MVS/kg PC, e dois níveis de suplementação (0,0 e 0,3% PC). Foi observada diferença significativa entre as ofertas de forragem, sendo que a de 2,5 kg de MVS/kg de PV possibilitou o maior GPD (0.605 kg/animal/dia). A SP da dieta de novilhas de corte com 0,3% do PV permite GPV adicional superiores a 200 g/dia. No experimento de seca o delineamento utilizado foi o de blocos casualizados, com 8 repetições, num fatorial 2 x 2, com medidas repetidas no tempo. Os tratamentos de seca foram definidos considerando as 2 quantidades de suplementos fornecidos no período da águas, combinando com 2 quantidades e teores de proteína (0,4% do PC com 25,3% de PB; 0,2% do PC com 52,1% PB). A suplementação com 0,4 e 0,2% propiciou GP relativamente altos (0,431 kg/dia e 0,268 kg/dia), respectivamente. O GP dos animais esteve diretamente relacionado com a oferta de folhas verdes. No experimento de confinamento foram testadas dietas com 50% e 80% de concentrado, com adição de MS ou BS. A alta inclusão de grãos...
This study aimed to evaluate different strategies for finishing heifers in pasture and feedlot system. In the first experiment, the heifers performance was evaluated during the wet to dry season period in a continues stocking grazing system with different forage allowance associated to supplementation. The second experiment was conducted to evaluate supplementation during the dry season on the heifers performance kept in a pasture stockpiled at the end of the wet season. In the third study evaluate the performance of feedlot heifers fed diets with two different roughage: concentrate ratios, containing monensin (MS) or sodium bicarbonate (BS) in order to evaluate the production systems of young females for slaughter. The wet season experiment was conducted according a randomized block design in a factorial 3 x 2 (three forage allowance levels 1.5, 2.0 and 2.5 kg of DM/ kg BW, and two supplementation levels (0.0 and 0.3% BW) with two replications (pastures) Significant difference between forage allowance was observed. The highest forage allowance (2.5 kg of DM/kg BW) resulted in highest average daily gain (ADG 0.605 kg/animal / day). Beef heifers supplementation with 0.3% BW allows additional ADG of the 200 g/ day. In the dry season experiment the design was a randomized block with eight replicates (heifers) in a 2 x 2 factorial, with repeated measures over time. The dry season treatments were arranged considering the two quantities of supplement provided during the wet period, combining with two quantities of supplement and protein content (0.4% BW with 25.3% CP, 0.2% of the PC 52, 1% CP). Supplementation with 0.4 and 0.2% BW resulted in relatively high daily weight gain (0.431 and 0.268 kg/ day), respectively. The animals ADG were directly related to the green leaves allowance. In the feed lot experiment were evaluated diets with 50% and 80% of concentrate, associated with sodium ... (Complete abstract click electronic access below)
Tuey, Remy K. « The biology and ecology of the epilachnid beetle Chnootriba similis Thunberg (Coleoptera : Coccinellidae) ». Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285337.
Texte intégralRamirez, Ascheri José Luis. « Extração e caracterização de amido de Adlay (coix lacryma Jobi L.) ». [s.n.], 1987. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255290.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
Made available in DSpace on 2018-07-15T16:54:17Z (GMT). No. of bitstreams: 1 RamirezAscheri_JoseLuis_M.pdf: 3328496 bytes, checksum: bf60b216c5a8ce33d58e0dd60c719ed8 (MD5) Previous issue date: 1987
Resumo: O presente trabalho objetivou o estudo das condições de extração de amido do cereal Adlay (Coix lacryma jobi L.), assim como a caracterização físico química desta provável fonte de amido. A composição química do grão de Adlay apresentou, assim como outros cereais, um alto teor de carboidratos (69,51%), porém também ura teor relativamente alto de proteínas (16,82%). Os estudos de beneficiamento e moagem da semente mostraram que é possível produzir farinhas utilizando a beneficiadora de arroz e posterior moagem no moinho Brabender Quadrumat Senior. O amido de Adlay obtido a partir de farinhas, usando tolueno:água na proporção de 1:8 apresentou rendimentos de aproximadamente 44 ,9% e teores de proteína e lipídios de aproximadamente 0,5% e 0,89%, respectivamente. O teor de amido danificado foi de 1,2 Unidades Farrand. O exame microscópico do amido de Adlay em microscópio óptico mostrou que este grânuIo é pequeno (1,2 a 3,5 micra) e tem forma esférica e achatada com depressão central. Com luz polarizada os grânulos apresentaram cruz de malta central. A perda da foi birrefringência inicia-se aproximadamente a 68º C é esta perda e praticamente total a 75ºC. A densidade absoluta foi 1,4793 g/ml e a viscosidade intrínseca 1,3257 dl/g. A capacidade de absorção em água fria foi de 119,2% e o índice de solubilização 0,09%. O Poder de Inchamento e índice de solubilização a 95ºC foi de 48,35 g/g e 20,81 % respectivamente. A reação com lodo apresentou cor marrom escura, semelhante a encontrada no amido de milho ceroso, porém diferente da cor azul apresentada pelo amido de milho normal. O valor de "Blue Value" foi de 2,32% de amilose, o que justifica a cor da reação com iodo e o fato de não ter conseguido precipitação da amilose no fracionamento do amido. Na determinação da cristalinidade por raios-X os difractogramas obtidos apresentaram o padrão do tipo A, típico de amido de cereais. O estudo das propriedades de pasta do amido de Adlay mostrou que este tipo de amido apresenta alta temperatura de inicio de formação de pasta comparado com amidos normais de cereais, porém a faixa de gelatinização é estreita, mostrando que as forças que mantém a estrutura do grânulo são homogêneas. Uma vez atingida a viscosidade máxima, esta diminue rápidamente, aproximadamente até 50% da viscosidade máxima. Durante o ciclo de resfriamento o aumento de viscosidade é pequeno de aproximadamente 10% da viscosidade mínima a temperatura constante de 95ºC. Os testes de retrogradação mostraram que o amido não apresentou exsudação de água após 15 dias de armazenamento a - 2ºC . Os valores de transmitância óptica a 95ºC e/ou com posterior resfriamento foram mais altos que o do milho normal. Amidos tratados a diferentes pHs (3-8) não mostraram mudanças significativas nas suas propriedades de pasta, assim como também a adição de sacarose (10-60%) , glicose (2-30%) e cloreto de sódio (2-6%).
Abstract: The objective of this research was to study the conditions for starch extraction from the cereal Adlay (Coix lacryma joblL.) as well as to carry out physico-chemical characterization of this probable starch source. Like other cereals, the Adlay grain showed high levels of carbohydrate (69.51%) but accompanied by relatively high levels of protein (16.82%). Processing and milling studies of the grain showed that it was possible to produce flour using a rice processor and subsequent Killing in the Brabender Quadrumat Senior mill. Using toluene: water mixture in the proportion 1:8, starch yields of approximately 44.9% were obtained from Adlay flour with protein and lipid levels of approximately 0.5% and 0.89% respectively. The level of damaged starch was 1.2 Farrand units. Under the optical microscope, the Adlay starch grain was shown to be small (1.2-3.5 u), spherical and, flattened, with a central depression. Under polarized light, the granules presented a central malta cross. The loss of birefringence started at approximately 68ºC, being practically complete at 75ºC. The absolute density was 1,4793 g/ml and the Intrinsic viscosity 1.3257 dl/g. The absorption capacity in cold water was 119.2% and the solubility index 0.09%. The swelling power and solubility index at 95ºC were 48.35 g/g and 20.81% respectively. A dark brown colour was produced with iodine similar to that obtained with waxy corn starch, but different from the blue colour obtained with the starch from normal corn. The Blue Value indicated a 2,32% content of amylose,, which justifies the colour obtained in the lodine reaction and the fact that there was no precipitation of amilse during the fractionation of the starch. The diffractograms obtained in the determination of cristallinity by X-rays were of the type A pattern, typical of cereal starches. In a study of the properties of Adlay starch paste, it was shown that the temperature for the inicial paste formation was high as compared to other cereal starches , but that the gelatinization range was narrow, showing that the forces maintaining the structure of the grain were homogeneous. Once maximum viscosity was attained there was a rapid loss, up to 50% of the maximum viscosity. The viscosity increase during the cooling cycle was small, amounting to aproximately 10% of the minimum viscosity at the constant temperature of 95ºC. Retrogradation tests showed no exudation of water from the starch after 15 days of storage at -2ºC. The optical transmittance values at 95ºC and/as with subsequent coolling, were higher than those obtained with normal corn starch, treatment of the starch at different pH values (3-8) showed no significant changes In the properties of the starch paste and nor did the addittions of sucrose (10-60%) , glucose (2-30) or sodium chloride (2-6%).
Mestrado
Mestre em Tecnologia de Alimentos
Zupo, Talita Marques. « Invasão, competição e uso de recursos por uma gramínea nativa e uma gramínea invasora do cerrado ». Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-04032011-140330/.
Texte intégralMany African grasses have been introduced in Brazil and have invaded areas of Brazilian savannas, thus becoming a major threat to the biological diversity of this biome. Traits involving evolutionary trade-offs that influence the species adaptive strategies, such as differences in nutrient uptake, nutrient loss and biomass allocation in response to plant competition and facilitation, and environmental stress and disturbance, will influence individual performance and population maintenance in plant communities. Therefore, it is extremely important to identify the mechanisms associated with invasiveness that lead to a better performance of exotic species over co-occuring natives. Comparisons involving traits of both native and exotic species may lead to a better understanding concerning the success of invasions. This study sought to recognize possible competitive strategies adopted by an invasive grass, Urochloa decmbens, and a native grass, Echinolaena inflexa, in a Brazilian savanna. In order to identify aspects relative to their colonization strategies, the reproductive fenologies and seed viability and germination rates of both species were analyzed. An experiment with potted plants was performed where seeds of both species were sown in different relative proportions to each other. Three census were carried out during a period of 12 months to evaluate survival, growth and fecundity of both species. Gas exchange and chlorophyll fluorescence were quantified for each species in pure and mixed stands in the field; total and specific leaf area for both species were also measured. In the potted experiment, when seeds of both species were sown together, the growth of the native species was suppressed by the exotic species. In pure treatments, however, individuals of the native species grew in size, but only 2% reproduced. On the other hand, individuals of the exotic species grew in size and reproduced in all treatments, demonstrating that this species allocated enough resources for both growth and reproduction. The photosynthetic rates were greater for the invasive species, however, in mixed stands, both species had their photosynthetic rates and capacities decreased. The smaller specific leaf area of the native species suggests lower rates of nutrient loss than the invasive species, which would favor its persistence in nutrient poor environments, as the Brazilian savannas. Yet, with the occurrence of disturbances and variable nutrient availabilities, the native species might be displaced by the invasive species, since the later possesses traits leading to a higher competitive ability in such conditions.
Palmeira, Ana Rita Onodera. « Ictiofauna e bioacumulação de metais pesados na cadeia trófica, Rio Gramame, Bacia do Rio Gramame Paraíba ». Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/4139.
Texte intégralCoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The objective of this study was to determine the fish diversity and the bioaccumulation of heavy metals in the trophic chain of River Gramame in the hydrographic basin of River Gramame, Paraíba. The fish composition was determined by collecting fish from 10 specific areas along the River Gramame, utilizing diversified fishery techniques, during the dry and rainy seasons of 2010 to 2011. The fish collected was transported to the Laboratory of Aquatic Ecology (DSE/CCEN/UFPB), where biometry of fish was carried out (total weight and standard length), to determine the type of growth and condition factor, with a view to compare these parameters in contaminated fish. The food habits of the fish were determined by analyzing the stomach contents using the frequency of occurrence method. This was useful to understand the food chain which served as a base for the study of bioaccumulation of heavy metals in fish. The ecological diversity was determined from the indices of diversity (Shannon-Wiener), equitability (Simpson), similarity (Jaccard) and species richness. The concentrations of heavy metals (Pb, Zn, Cd, Cu) in the fish muscle were quantified by square wave voltammetry (VOQ) in a potentiostat/galvanostat in the Laboratory of Environmental Chemical Studies (DQ/CCEN/UFPB), and total mercury (Hg) by atomic absorption spectrometry with cold vapor (CV AAS) in IPEN/USP/SP. The fish composition of the upstream area showed lower taxa than the downstream area (16 to 26 genera and 17 to 27 species, respectively). The abundant species were, Cichla ocellaris (55.39%±28.96), Metynnis lippincottiannus (20.34%±13.4), Prochilodus brevis (16.63%±11.36) and Hoplias malabaricus (13.33%±7.57), during both seasons of the year. The indices of diversity showed differences between the rainy and dry seasons and the upstream and the downstream areas of the reservoir (H =1.3075; H =1.538), (H =1.6497; H =1.3553), with richness represented (17 to 26 and 18 to 22 species respectively) and a heterogeneous distribution of species (J =0.52269 and J =0.38618 respectively), due to the dominance of C. ocellaris in upstream and of M. lippincottianus in downstream of the reservoir. The growth rate of most of the species analyzed showed young individuals, indicating negative allometric growth. The diet of the species showed little difference, indicating mostly generalist food habits of fish along River Gramame. The principal component analysis (PCA) expressed a tendency in upstream and downstream areas of the reservoir to differ in terms of heavy metal accumulation in the trophic chain. A major contamination of total mercury was registered in the upstream area, while there was lead and zinc contamination in the downstream area of the reservoir. It could be concluded that along River Gramame there is major dominance of exotic species with a low diversity of native species. The feeding habits of the fish species showed a generalist tendency, with more omnivores. High heavy metal concentration was registered in the omnivores, indicating biomagnifications of toxic elements among the studied species.
O presente trabalho teve por objetivo, determinar a diversidade da ictiofauna e a bioacumulação de metais pesados na cadeia trófica do Rio Gramame, Bacia do Rio Gramame, Paraíba. Para isso foi realizada análise da ictiofauna presente, com coletas dos espécimes realizadas em 10 pontos ao longo do Rio Gramame, utilizando diversas artes de pesca, durante as estações de chuva e estiagem de 2010 a 2011. O material coletado foi transportado para o Laboratório de Ecologia Aquática (DSE/CCEN/UFPB), onde foram feitas as análises biométricas dos indivíduos (peso total e comprimento padrão), para determinar o tipo de crescimento e o fator de condição, objetivando a comparação desses parâmetros com a contaminação dos peixes. A dieta alimentar das espécies foi conhecida a partir de análises do conteúdo estomacal pelo método de freqüência de ocorrência, com finalidade de conhecer a teia alimentar, que serviu de base para o estudo da biomagnificação dos metais pesados na ictiofauna. Posteriormente, a diversidade ecológica foi determinada a partir dos índices de diversidade (Shannon-Wiener), Equitabilidade (Simpson), similaridade (Jaccard) e riqueza de espécies. As concentrações dos metais pesados (Pb, Zn, Cd, Cu) no tecido muscular das espécies foram quantificados por voltametria de onda quadrada (VOQ) em um potenciostato/galvanostato no Laboratório de Estudos Químicos Ambientais (DQ/CCEN/UFPB), e o mercúrio total (Hg) por espectrometria de absorção atômica com geração de vapor frio (CV AAS) no IPEN/USP/SP. A composição da ictiofauna a montante apresentou um número de taxa menor do que a jusante do reservatório (16 e 26 gêneros e 17 e 27 espécies, respectivamente), sendo as espécies mais abundantes, Cichla ocellaris (55,39%±28,96), Metynnis lippincottiannus (20,34%±13,4), Prochilodus brevis (16,63%±11,36) e Hoplias malabaricus (13,33%±7,57), em ambas as estações do ano. Os índices de diversidade apresentaram diferenças entre as estações de chuva e estiagem e as áreas a montante e a jusante do reservatório (H =1,3075; H =1,538), (H =1,6497; H =1,3553), como uma riqueza representada (17 e 26 e 18 e 22 espécies respectivamente) e uma distribuição heterogênea das espécies (J =0,52269 e J =0,38618 respectivamente), devido à dominância de C. ocellaris a montante e de M. lippincottianus a jusante do reservatório. A estrutura de crescimento da maioria das espécies analisadas foi representada por indivíduos jovens, revelando um crescimento do tipo alométrico negativo na população. A dieta alimentar das espécies apresentou-se pouco diferenciada, levando a uma maior incidência de hábitos alimentares generalistas ao longo do Rio Gramame. A análise de componentes principais (PCA) expressou uma tendência das áreas a montante e a jusante do reservatório diferir quanto à acumulação por metais pesados na cadeia trófica. A maior contaminação por mercúrio total foi registrada a montante, enquanto que, chumbo e zinco a jusante do reservatório. Concluí-se que, ao longo do Rio Gramame a ictiofauna apresentou uma maior dominância de espécies exóticas, levando a uma menor representação na diversidade das espécies nativas. A dieta alimentar das espécies revelou hábitos alimentares generalistas, com a categoria trófica onívora mais abundante. As maiores concentrações dos metais pesados foram registradas entre espécies de hábitos onívoros, indicando uma biomagnificação dos elementos tóxicos entre as espécies estudadas.
Souza, Jane Enisa Ribeiro Torelli de. « Ictiofauna e bioacumulação de metais pesados na cadeia trófica, Rio Gramame, bacia do Rio Gramame Paraíba ». Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/4140.
Texte intégralCoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The objective of this study was to determine the fish diversity and the bioaccumulation of heavy metals in the trophic chain of River Gramame in the hydrographic basin of River Gramame, Paraíba. The fish composition was determined by collecting fish from 10 specific areas along the River Gramame, utilizing diversified fishery techniques, during the dry and rainy seasons of 2010 to 2011. The fish collected was transported to the Laboratory of Aquatic Ecology (DSE/CCEN/UFPB), where biometry of fish was carried out (total weight and standard length), to determine the type of growth and condition factor, with a view to compare these parameters in contaminated fish. The food habits of the fish were determined by analyzing the stomach contents using the frequency of occurrence method. This was useful to understand the food chain which served as a base for the study of bioaccumulation of heavy metals in fish. The ecological diversity was determined from the indices of diversity (Shannon-Wiener), equitability (Simpson), similarity (Jaccard) and species richness. The concentrations of heavy metals (Pb, Zn, Cd, Cu) in the fish muscle were quantified by square wave voltammetry (VOQ) in a potentiostat/galvanostat in the Laboratory of Environmental Chemical Studies (DQ/CCEN/UFPB), and total mercury (Hg) by atomic absorption spectrometry with cold vapor (CV AAS) in IPEN/USP/SP. The fish composition of the upstream area showed lower taxa than the downstream area (16 to 26 genera and 17 to 27 species, respectively). The abundant species were, Cichla ocellaris (55.39%±28.96), Metynnis lippincottiannus (20.34%±13.4), Prochilodus brevis (16.63%±11.36) and Hoplias malabaricus (13.33%±7.57), during both seasons of the year. The indices of diversity showed differences between the rainy and dry seasons and the upstream and the downstream areas of the reservoir (H =1.3075; H =1.538), (H =1.6497; H =1.3553), with richness represented (17 to 26 and 18 to 22 species respectively) and a heterogeneous distribution of species (J =0.52269 and J =0.38618 respectively), due to the dominance of C. ocellaris in upstream and of M. lippincottianus in downstream of the reservoir. The growth rate of most of the species analyzed showed young individuals, indicating negative allometric growth. The diet of the species showed little difference, indicating mostly generalist food habits of fish along River Gramame. The principal component analysis (PCA) expressed a tendency in upstream and downstream areas of the reservoir to differ in terms of heavy metal accumulation in the trophic chain. A major contamination of total mercury was registered in the upstream area, while there was lead and zinc contamination in the downstream area of the reservoir. It could be concluded that along River Gramame there is major dominance of exotic species with a low diversity of native species. The feeding habits of the fish species showed a generalist tendency, with more omnivores. High heavy metal concentration was registered in the omnivores, indicating biomagnifications of toxic elements among the studied species.
O presente trabalho teve por objetivo, determinar a diversidade da ictiofauna e a bioacumulação de metais pesados na cadeia trófica do Rio Gramame, Bacia do Rio Gramame, Paraíba. Para isso foi realizada análise da ictiofauna presente, com coletas dos espécimes realizadas em 10 pontos ao longo do Rio Gramame, utilizando diversas artes de pesca, durante as estações de chuva e estiagem de 2010 a 2011. O material coletado foi transportado para o Laboratório de Ecologia Aquática (DSE/CCEN/UFPB), onde foram feitas as análises biométricas dos indivíduos (peso total e comprimento padrão), para determinar o tipo de crescimento e o fator de condição, objetivando a comparação desses parâmetros com a contaminação dos peixes. A dieta alimentar das espécies foi conhecida a partir de análises do conteúdo estomacal pelo método de freqüência de ocorrência, com finalidade de conhecer a teia alimentar, que serviu de base para o estudo da biomagnificação dos metais pesados na ictiofauna. Posteriormente, a diversidade ecológica foi determinada a partir dos índices de diversidade (Shannon-Wiener), Equitabilidade (Simpson), similaridade (Jaccard) e riqueza de espécies. As concentrações dos metais pesados (Pb, Zn, Cd, Cu) no tecido muscular das espécies foram quantificados por voltametria de onda quadrada (VOQ) em um potenciostato/galvanostato no Laboratório de Estudos Químicos Ambientais (DQ/CCEN/UFPB), e o mercúrio total (Hg) por espectrometria de absorção atômica com geração de vapor frio (CV AAS) no IPEN/USP/SP. A composição da ictiofauna a montante apresentou um número de taxa menor do que a jusante do reservatório (16 e 26 gêneros e 17 e 27 espécies, respectivamente), sendo as espécies mais abundantes, Cichla ocellaris (55,39%±28,96), Metynnis lippincottiannus (20,34%±13,4), Prochilodus brevis (16,63%±11,36) e Hoplias malabaricus (13,33%±7,57), em ambas as estações do ano. Os índices de diversidade apresentaram diferenças entre as estações de chuva e estiagem e as áreas a montante e a jusante do reservatório (H =1,3075; H =1,538), (H =1,6497; H =1,3553), como uma riqueza representada (17 e 26 e 18 e 22 espécies respectivamente) e uma distribuição heterogênea das espécies (J =0,52269 e J =0,38618 respectivamente), devido à dominância de C. ocellaris a montante e de M. lippincottianus a jusante do reservatório. A estrutura de crescimento da maioria das espécies analisadas foi representada por indivíduos jovens, revelando um crescimento do tipo alométrico negativo na população. A dieta alimentar das espécies apresentou-se pouco diferenciada, levando a uma maior incidência de hábitos alimentares generalistas ao longo do Rio Gramame. A análise de componentes principais (PCA) expressou uma tendência das áreas a montante e a jusante do reservatório diferir quanto à acumulação por metais pesados na cadeia trófica. A maior contaminação por mercúrio total foi registrada a montante, enquanto que, chumbo e zinco a jusante do reservatório. Concluí-se que, ao longo do Rio Gramame a ictiofauna apresentou uma maior dominância de espécies exóticas, levando a uma menor representação na diversidade das espécies nativas. A dieta alimentar das espécies revelou hábitos alimentares generalistas, com a categoria trófica onívora mais abundante. As maiores concentrações dos metais pesados foram registradas entre espécies de hábitos onívoros, indicando uma biomagnificação dos elementos tóxicos entre as espécies estudadas.
Allred, Kelly W. « Perennial Festuca (Gramineae) of New Mexico ». University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/555884.
Texte intégralIto, Sanae. « The Grameen Bank : rhetoric and reality ». Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285079.
Texte intégralAmeen, Farhad. « The economics of the Grameen Bank ». Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-144855/.
Texte intégralFilgueiras, Tarciso de Sousa. « O genero mesosetum steudel ; (gramineae paniceae) ». [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315039.
Texte intégralTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: Apresenta-se uma revisão taxonômica do gênero Mesosetum Steude l (Gramineae: Paniceae). O gênero distingue-se dos demais de sua tribo pela inflorescência em espiga terminal,solitária, espiguetas com primeira gluma voltada para a raque e cariopse com hilo linear. Os caracteres de maior peso taxonômico no reconhecimento das espécies são presença ou ausência de raque alada na espiga, forma, .tamanho relativo, numero de nervuras e ornamentação (pêlos e/ou arista) das glumas e lema inferior. São reconhecidas 25 espécies, 20 das quais ocorrem no Brasilo Os demais países onde o gênero ocorre são: México,da América Central (exceto E1 Salvador), Cuba, Jamaica, países Trinidad, Guiana, Guiana Francesa, Suriname, Venezue1a, Colômbia, Bolívia, paraguai e Argentina. são apresentadas descrições detalhadas, chaves para as seções e espécies, dados anatômicos (eP2. derme e corte transversal da lâmina) de 14 espécies. ... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: A taxonomic revision of the neotropical grass genus Mesosetum Steudel (Gramineae: Paniceae) is presented. Mesosetum can be distinguished from the other genera in the tribe by the solitary, termiflal spike, the first glume of spikelet turned towards the rachis, and, the caryopsis with a linear hilum. The morphological features that have proved most useful in distinguishing the species are the presence or absence of wings on the rachis, as well as the form, relative size, number of nerves and ornamentation (hairs and/or awn) of glumes and lower lemma. Twenty five species are considered validin this treatment, twenty of which occur in Brazil, the remaining five are scattered in Mexico, all Central America (except El Salvador) ,Cuba, Jamaica, Trinidad, Guyana, French Guiana, Suriname, Venezuela, Colombia, Bolivia, Paraguay and Argentina. Detailed descriptions, illustrations and a key to the sections species are provided. Leaf anatomy data (epidermis and and cross section of lamina) of fourteen species are also presented. ... Note: The complete abstract is available with the full electronic digital thesis or dissertations
Doutorado
Doutor em Ciências Biológicas
Aulin, Beatrice, et Henriksson Linnea. « The water balance in Graminha Basin ». Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226430.
Texte intégralIdag återstår endast 7% av den atlantiska regnskogen som en gång täckte Brasilien södra kust. Regnskogen försvinner snabbt vilket har lett till att Brasiliens regering de senaste åren visat ett ökat intresse att bevara regnskogen. Fler och fler områden har förvandlats till nationalparker och reservat. I utkanten till ett av dessa reservat ligger forskningsstationen Iracambi. Iracambi bedriver forskning i och runt området för att hitta metoder för att bevara regnskogen och öka kunskapen om området. Detta projekt är ett litet bidrag till detta arbete. Det övergripande syftet med projektet var att upprätta en vattenbalans över floden Graminhas avrinningsområde. Detta är huvudfloden i området och genom upprätta en vattenbalans kan förståelsen för förändringarna av vattentillgången i ekosystemet öka. Ett viktigt mål med projektet var också att finna verktyg som forskningsstationen Iracambi kan använda för kontinuerliga mätningar av de parametrar som ingår i vattenbalansen.Projektets genomfördes under regnperioden mellan den 13 februari och den 12 april, 2012. Flödesmätningarna utfördes vid fem mätstationer längs floden Graminha. Två typer av utrustning användes: flygel och konduktivitetsmätare. Rekommendationen för Iracambi var att fortsätta mätningarna med framförallt konduktivitetsmätaren. Uppskattningarna av avdunstningen genomfördes på två sätt: dels genom upprättandet av en evaporationspanna, dels genom beräkningar. Beräkningarna genomfördes med Penman-Monteith ekvationen och det kunde konstateras att även om de ingående parametrarna innehåller en del osäkerheter, så var detta den mest passande metoden för att beräkna avdunstningen. Nederbörd mättes på två platser med hjälp av enkla regnmätare konstruerade av pet-flaskor.Slutligen upprättades en vattenbalans för området. Utifrån denna kunde det konstateras att vattenmagasinet för hela orådet minskade under mätperioden. Utifrån flödesmätningar samt observationer kunde slutsatsen dras att skogsområdena drabbades mindre än de gräsbevuxna områdena av de kraftiga översvämningarna som uppstod under intensiva regn. Vidare visar resultaten att forskningsstationen Iracambi kan få en bra uppskattning av flödesförändringar, nederbörd och avdunstning med hjälp av den enkla utrustning som användes i detta projekt.
Minor Field Study
Gramling, Amy M. « Effect of two intervention strategies on science homework completion ». Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/gramling/GramlingA0811.pdf.
Texte intégralMaamouri, Amel. « Variabilité génétique de la luzerne cultivée en association avec une graminée fourragère ». Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2268/document.
Texte intégralAlfalfa is a perennial forage legume that has many agronomic and environmental benefits. The performance of alfalfa - grass mixtures depends on biomass production and protein content of each species and its survival. The effect of genetic variation on alfalfa yield components in mixtures is little described. In this context, this thesis has two objectives: i) to characterize the genetic diversity for traits related to alfalfa production and quality in mixture ii) to analyze the genetic control of these traits. Two designs that included three treatments (alfalfa - fescue mixture, monoculture and spaced plants) were established. The first design comprised 46 contrasting alfalfa genotypes which were phenotyped over two years for architecture, biomass and protein concentration. The second design comprised an F1 population of 198 individuals being phenotyped over one year. The F1 population was genotyped with SSR and DArT markers to construct a genetic map. A wide genetic variation among alfalfa genotypes was shown. This variation affected the height and protein content of associated fescue. It was observed that the measured traits of spaced plants or in monoculture are relatively predictive of the same traits in the mixture, but genotype evaluation in mixture is required. QTL detection shows that some QTL were common to different treatments. Each QTL explained 6-23 % of the variation for height and biomass. Some methodologies for selection are proposed
Billiard, Dominique. « Modelisation du developpement des talles d'une graminee tropicale : hyparrhenia diplandra (hochst. (stapf.)) ». Rennes 1, 1993. http://www.theses.fr/1993REN10127.
Texte intégralSteiner, Marcelo Gomes. « Caracterização agronômica, molecular e morfológica de acessos de Paspalum notatum Flugge e Paspalum guenoarum Arech ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/11281.
Texte intégralThe genus Paspalum encompasses many important forage species for the cattle industry in Rio Grande do Sul. In this group one of the most important is P. notatum, a species with a large geographic distribution and which presents many ecotypes. This work has the objectives to make the molecular, agronomic and morphological characterization of different accesses of P.notatum. The agronomic characterization was performed at the EEAUFRGS, located at Eldorado do Sul and evaluated 2 promising accesses (André da Rocha e Bagual), 2 accesses of P. guenoarum (Baio e Azulão) and the commercial cultivar Pensacola (P. notatum var. saurae). During 2 years of evaluations, the accesses of P.guenoaraum were better in forage production than P.notatum and the Bagual access outyielded the Baio and Pensacola accesses. In relation to yield distribution, the P.guenoarum accesses were less cold sensitive than the others. All the accesses were similar in relation to CP, ADF and NDF. In the molecular characterization, 40 accesses from different regions were analyzed by RAPD markers. The results showed a genetic similarity (Jaccard Index) ranging from 0,0 to 0,80. The accesses were grouped into seven different similarity groups, revealing a high genetic variability. The use of RAPD markers was efficient in distinguishing genetically all the accesses. Finally, the morphological characterization analyzed 41 accesses of P. notatum from the same collection described above and the characters evaluated were related to leaf (blade and shealth), inflorescence and growth habit. The results showed through the Mahalanobis estimate of genetic distance, that the biggest distance between two accesses was 84,31, while the smallest was 1,61. The characters with the largest contribution to the genetic divergence, contributing with around 60%, were the raceme and spiklet length and leaf length and width.
Estelrich, Hector Daniel. « Allocation du carbone chez une Graminée annuelle (Bromus madritensis L. ) et une Graminée pérenne (Bromus erectus Hud. ) cultivées sur deux sols de fertilité différente : importance de l'"effet rhizosphère" ». Montpellier 2, 1990. http://www.theses.fr/1990MON20262.
Texte intégralMolin, Demi, et Ewa-Lena Bichsel. « Effektivitet och utveckling : Grameen Banken i Bangladesh ». Thesis, Högskolan i Gävle, Avdelningen för ekonomi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-7245.
Texte intégralThe purpose of this study is to analyze an organisation, Grameen Bank, and illustrate a relevant problem in the world. There are plenty of aid organizations that help countries, but to enable the build-up of an infrastructure, new methods are required that help the establishment of new entrepreneurs. Muhammad Yunus founded Grameen Bank in Bangladesh to help the poor population to develop and enhance their living standards by lending them micro loans. The purpose of this study: Investigate how the organisation of Grameen Bank works Acquire the purpose, goal and vision of Grameen Bank Investigate the factors that influence the efficiency and development of Grameen Bank
Henderson, Catherine. « Antioxidants of 'Blumeria graminis' and 'Magnaporthe grisea' ». Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427620.
Texte intégralBaxová, Lucie. « Mikrofinance : Grameen banka a chudoba v Bangladéši ». Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-1392.
Texte intégralAkhkha, Abdellah. « Relative tolerances of wild and cultivated barleys to infection by Blumeria graminis f.sp. hordei (syn. Erysiphe graminis f.sp. hordei) ». Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340726.
Texte intégralCosta, Neumárcio Vilanova da [UNESP]. « Características anatômicas foliares e morfológicas de quatro espécies de gramas sob aplicação de trinexapac-ethyl ». Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/99981.
Texte intégralCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O presente trabalho teve por objetivo avaliar os efeitos da aplicação seqüencial de duas doses de trinexapac-ethyl sobre a anatomia foliar e a morfologia da planta das espécies de gramas São Carlos (Axonopus compressus), Batatais (Paspalum notatum), Santo Agostinho (Stenotaphrum secundatum) e Esmeralda (Zoysia japonica). Os tratamentos utilizados foram constituídos de duas aplicações seqüenciais de trinexapac-ethyl na dose de 56,5+56,5 e 113,0+113,0 g ha-1, além de uma testemunha sem aplicação, para cada espécie avaliada. Os gramados foram cortados com auxílio de um aparador de grama motorizado à altura de 3 cm e em seguida foram realizadas as aplicações dos tratamentos. Após 20 dias da primeira aplicação dos tratamentos, as parcelas foram novamente aparadas à altura de 3 cm e foi realizada a segunda aplicação dos tratamentos. O delineamento experimental utilizado foi o de blocos ao acaso com quatro repetições. A redução de crescimento foi avaliada através da medição direta da altura das plantas com régua graduada em centímetros. O número e altura de inflorescências emitidas foram avaliados por amostragem realizada em 0,25 m2 no centro das parcelas, semanalmente. Também foi amostrada a massa seca total produzida pelos tratamentos durante todo o período de condução do experimento. Aos 110 dias após a segunda aplicação dos tratamentos foram realizadas as amostragens do material foliar, para as quatro espécies estudadas. Com relação às estruturas presentes no limbo foliar, foram quantificados os seguintes caracteres anatômicos das regiões da nervura central e internervural: epiderme das faces adaxial e abaxial, feixe vascular, bainha do feixe vascular (=endoderme), esclerênquima, parênquima e espessura foliar. Foi também determinado, na região internervural, o número de feixes vasculares presentes na estrutura foliar, bem como realizada...
The aim of this research was to evaluate the effect of sequential application in two rates of trinexapac-ethyl in leaf anatomy and plant morphology of the following turfgrass species: Broadleaf Carpetgrass (Axonopus compressus), Bahiagrass (Paspalum notatum), St. Augustinegrass (Stenotaphrum secundatum) and Korean Lawngrass (Zoysia japonica). The treatments used were trinexapac-ethyl with two sprays applied with 20 days interval in two different rates (56,5+56,5 and 113,0+113,0 g ha-1) and a control without spraying, for each evaluated species. The turfgrasses were cut off with a motorized cutter of grass to the 3 cm height, and after the treatments were sprayed. 20 days after the first treatments application, the plots were cut again and the second application of treatments was made. The experimental design was completely randomized blocks with four replications. The growth reduction was evaluated through the direct measurement of the height of plants with a ruler graduated in centimeters. The number and height of emitted flowers had been evaluated by sampling carried through in 0,25 m2 in the plots center, weekly. The total dry matter produced by the treatments during the experimental period conduction was sampled. Samples of the foliar material from the four studied species were made at 110 days after second application. For anatomy characterizations were studied anatomic structure presented at leaf blade and the following structures were quantitative evaluated: adaxial and abaxial epidermal faces, vascular bundles (= endoderm), esclerenchyma, parenchyma and leaf thickness. Also the vascular beam number was determined in the internervural region presented in the leaf structure, as well as carried through the counting of the number of stomata of the faces adaxial and abaxial of the epidermis. The data of leaf anatomical characters and quantitative... (Complete abstract click electronic access below)
Krol, Laurens R. [Verfasser], Thorsten O. [Akademischer Betreuer] Zander, Klaus [Akademischer Betreuer] Gramann, Klaus [Gutachter] Gramann et Robert J. K. [Gutachter] Jacob. « Neuroadaptive technology : concepts, tools, and validations / Laurens R. Krol ; Gutachter : Klaus Gramann, Robert J.K. Jacob ; Thorsten O. Zander, Klaus Gramann ». Berlin : Technische Universität Berlin, 2020. http://d-nb.info/1222588420/34.
Texte intégralMello, Luciane Vieira de. « Estudo da biologia da reprodução em populações de Coix spp ». [s.n.], 1989. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315620.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: O presente trabalho teve como objetivo principal gerar conhecimentos sobre a estrutura genética de algumas populações de Coix, em função de seu sistema reprodutivo. Para tanto, efetuou-se uma análise comparativa de várias populações, e realizou-se estudos de aspectos de biologia de reprodução, canalizando-os para a estimativa da taxa de cruzamento dessas populações.Os resultados mostraram que a população Adlay possue características de uma populção domesticada. A população Rosadlay apresentou potencial para produção de grãos e grande massa verde,devendo. portanto ser avaliada como forrageira. ... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: The main objective of this work was to generate knowledge about the genetic structureof some Coix populations,based upon their reproductive system. Thus, a comparative reproductive analysis of many populations was carried out, and studies on the biology of reproduction were made, aiming to estimate the crossing rates of such populations.The results suggested that the Adlay population has withholds characteristics of a domesticated population. As the Rosadlay population showed a potentiality for grain yield and green mass, it should therefore be evaluated as a forage crop. ... Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Genetica
Mestre em Ciências Biológicas
Macedo, Eduardo Cortado. « Testes de vigor para avaliação da qualidade fisiologica de sementes de Brachiaria humidicola (Rendle) Schweick durante o armazenamento ». [s.n.], 1992. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257186.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola
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Resumo: Sementes de gramíneas forrageiras necessitam ser melhor estudadas, principalmente quanto à,avaliação de sua qualidade para fins de armazenamento e comercialização. Com esse objetivo, a qualidade de sete lotes de sementes de Srachiaria humidicola, de diferentes procedências, foi avaliada no início e durante doze meses de armazenamento em condiç5es comuns de ambiente de armazém, na região de Campinas, SP. Os testes realizados foram os de germinação,frio,envelhecimento acelerado, tetrazólio, condutividade elétrica lixiviação de potássio, peso de mil sementes, peso hectolitricô, pureza e umidade. Os três primeiros testes mencionados,foram realizados com e sem escarificação com ácido sulfúrico concentrado por dez minutos, e contagens feitas aos 14 e 21 dias, As diferenças entre tratamentos e lotes foram avaliadas por meio de comparações estatísticas, inclusive correlação e regressão simples entre os resultados de diversos testes realizados no início e os de germinação obtidos mensalmente por todo o período, Os resultados mostraram que a escarificação com ácido sulfúrico concentrado por dez minutos foi prejudicial à germinação das sementes. Os testes iniciais mais eficientes para a previsão da qualidade fisiólogica dos lotes de sementes durante os doze meses de armazenamento foram as seguintes: o de germinação contagem 21 dias para os meses dois,três,sete e doze; o de germinação contagem 14 dias para os meses oito, nove e dez; o de frio contagem 14 dias para os meses quatro,cinco e seis; e os de envelhecimento acelerado contagem 21 dias e condutividade elétrica para os meses um e onze,respectivamente.Os coeficientes de correlação simples obtidos pelos testes mais eficientes para os diversos períodos de armazenamento foram estatisticamente significativos e seus valores variam entre -0,459* e 0,780** que, embora nio possam ser considerados altos, permitiram, pelas correspondentes equações de regressão, satisfatórias indicações da armazenabilidade das sementes. Por outro lado, os testes de tetrazóilio,condutividade elétrica e lixiviação de potássio,não mostraram eficiência para a predição da qualidadefisiológica dos lotes durante o armazenamento.A pequena variação observada em relação ao peso de mil sementes,peso hectolítrico, pureza e umidade da semente,durante os doze meses foi devida aos efeitos de umidade relativa e temperatura do ambiente
Abstract: Seeds of forage grasses need to be better studied, mainly in relation their quality for purposes of storage and marketing. With this aim, the quality of seven signalgrass(Srachiaria humidicola) seed lots of different provenances, was evaluated at the beginning and during twelve months of storage 1n ambient conditions of a common warehouse, in Campinas region, State of São Paulo, Brazil. The test performed were germination, cold test, accelerated germination, cold test, accelerated aging, tetrazolium, electrical condutivity, potassium leakage, weight per thousand seeds, weight per hectoliter, purity and moisture content. The first three mentioned tests were carried out with and without previous scarification with concentrated sulphuric acid, and counts were made at 14 and 21 days. The differences among treatments and lots were evaluated by statistical comparisons, including simple correlation and regression between the results of several tests performed at the beginning and those of germination obtained at monthly intervals during the whole period. Results showed that scarification with concentrated sulphuric acid for 1O minutes was harmful to the germination of the seeds. The most efficient initial tests for predicting of the physiological quality of the seed lots during the twelve months of storage were: germination count at 21 days for months two, three, seven and twelve; germination count at 14 days for months eight, nine and ten; cold test count at 14 days for months four, five and six; accelerated aging count at 21 days and electrical conductivity for months one and eleven, respectively.The simple correlations coefficients obtained by use of the most efficient tests for the several storage periods varied between -O,459* and O,780** which, although cannot be considered high, allowed by the corresponding regression equations, satisfactory indications of the storability of the seeds. On the other hand, the tetrazolium, electrical condutivity, and potassium leakage tests did not: show efficiency for predicting the physiological quality of the lots during storage. The small amount of variation in weight per thousand seeds, weight per hectoliter, purity and seed moisture during the twelve months was due to the effects of relative humidity and temperature of the environment
Mestrado
Pre-Processamento de Produtos Agropecuarios
Mestre em Engenharia Agrícola
Grün, Sebastian. « Die Evolution der Benzoxazinoid-Biosynthese in den Gramineae ». [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963017292.
Texte intégralBaur, Ulrike, et Peter Benner. « Gramian-Based Model Reduction for Data-Sparse Systems ». Universitätsbibliothek Chemnitz, 2007. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200701952.
Texte intégralBrueggeman, Robert Saxon. « Investigation of Puccinia graminis resistance genes in barley ». Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Spring2009/r_brueggeman_041709.pdf.
Texte intégralBARAKAT, ABDELALI. « Distribution des genes dans les genomes des graminees ». Paris 11, 1996. http://www.theses.fr/1996PA112184.
Texte intégralChapman, Daniel. « Spatial ecology of the tansy beetle (Chrysolina graminis) ». Thesis, University of York, 2006. http://etheses.whiterose.ac.uk/14079/.
Texte intégralWallace, Graham. « A study of phenolic-carbohydrate linkages in the Gramineae ». Thesis, University of Glasgow, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245610.
Texte intégralSaules, Maria Teresa Mejia. « Patterns of diversity in the tribe Meliceae (Gramineae : Pooideae) ». Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285822.
Texte intégralZiller, Sílvia Renate 1964. « A estepe gramíneo-lenhosa no segundo planalto do Paraná ». reponame:Repositório Institucional da UFPR, 2013. http://hdl.handle.net/1884/28899.
Texte intégralRichard, Didier. « Valeur alimentaire de quatre graminées fourragères en zone tropicale ». Paris 6, 1987. http://www.theses.fr/1987PA066599.
Texte intégralLopes, Ana Mafalda Rodrigues. « A flora do distrito de Aveiro : Alismataceae - Gramineae (Poaceae) ». Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/887.
Texte intégralA seguinte dissertação de mestrado apresenta o resultado do trabalho de informatização e revisão taxonómica de espécimes herborizados, existentes no Herbário da Universidade de Aveiro (AVE), dentro dos taxa das Monocotyledoneae, inseridos algumas das suas famílias, concretamente desde a Alismataceae até à Gramineae. O estudo incidiu sobre os espécimes do distrito de Aveiro, embora tivessem sido informatizados todos os espécimes constantes no herbário, mesmo de outras regiões do país, dentro dos grupos acima referidos. No que concerne à área de estudo, o distrito de Aveiro, este é constituído por 19 concelhos que se distribuem por duas províncias, a província da Beira Litoral e do Douro Litoral e ocupa uma área de 2808 km². Este distrito engloba maioritariamente a bacia hidrográfica do rio Vouga e parte da bacia hidrográfica do rio Douro. Ao nível geomorfológico, abrange uma larga faixa do litoral português, possuindo também algumas serras no seu relevo. O clima global que se faz sentir no distrito é um clima Mediterrâneo (húmido), embora com fortes influências Atlânticas. No âmbito deste estudo foram informatizados 1125 registos de espécimes herborizados, dos quais 661 colhidos no distrito de Aveiro e 464 noutras regiões do país. Como suporte informático recorreu-se ao programa Bramhs versão 5, do qual se extraiu um catálogo florístico, para o distrito de Aveiro com 109 taxa da classe das Monocotyledoneae, que se dividem por 14 famílias, 66 géneros, 100 espécies e 15 subespécies, duas delas com estatuto de conservação. ABSTRACT: In this study we present the result of the data basing process and taxonomic revision of the herbarium specimens belonging to the families Alismataceae to Gramineae (Monocotiledoneae), held in the University of Aveiro’s Herbarium (AVE). Although this study was focused on the specimens collected on the Aveiro District, all of the specimens held in the herbarium and belonging to the above mentioned families, where data based, even those collected in other districts of the country. The Aveiro District includes 19 counties, divided by two provinces, Beira Litoral and Douro Litoral. This district averages an area of 2808 km2 and includes most of the hydrographic basin of the Vouga River, and part of the hydrographic basin of the Douro River. At a geomorphologic level, it covers a wide range of the Portuguese coast and includes, also, some mountains. This district benefits globally from a Mediterranean type climate, although with strong Atlantic influences. On the scope of this study 1125 herbarium specimens have been data based, 661 collected in the Aveiro District and 464 original from other areas of the country. The software used was BRAHMS version 5, that allowed the extraction of a floristic catalog for the Aveiro District including 109 taxa, belonging to the Monocotiledoneae, divided by 14 families, 66 genera, 100 species, and 15 subspecies, two of them with a conservation status.
Sinclair, Rhona. « The kinetic characterisation of Rhodotorula graminis L-mandelate dehydrogenase ». Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/14427.
Texte intégralMarcos, Sissi Kawai. « Efeito do teor da pureza fisica, da natureza das impurezas presentes e do ambiente sobre a qualidade de sementes Brachiaria Decumbens Stapf em armazenamento ». [s.n.], 1989. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257451.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola
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Mestrado
Agua e Solo
Mestre em Engenharia Agrícola
Sawasato, Joaquim Taizo. « Caracterização agronômica e molecular de Paspalum urvillei steudel ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/11811.
Texte intégralThe natural grasslands are very important for the cattle livestock in the State of the Rio Grande so Sul, serving as the basis for feeding the animals for good part of the year. The knowlodge and description of the species that compose the native field are strategics to estimate of the use potential, foment the cattle livestock and mainly to preserve this natural patrimony. Thus, this study had the objective to characterize the genetic diversity and the agronomic performance of accesses of P. urvillei. The productive potential of P. urvillei was around 17tons/DM/ha to the André da Rocha, 16tons/DM/ha to Bagé and Eldorado do Sul ecotypes. These values of production are comparable to the productions reached by cultivated tropical forage species, showing that P. urvillei has an excellent productive potential. The morphogenic variable estimates were: filocron, with values of 161, 154 and 164 DD/leaf; leaf life span, with values of 411, 413 and 375 DD/leaf; final leaf length, with values of 24.7, 22.1 and 25.1 cm/leaf for the ecotypes André da Rocha, Bagé and Eldorado do Sul, respectively. The morphogenic variables indicate the necessity of more frequent defoliation management for the ecotype Bagé in relation to the other two. The analyses of genetic diversity indicated the formation of groups of similarity among the accesses by region. The analyses with RAPD markers presented an average similarity of 0.70, while the analyses with SSR markers presented an average similarity of 0.60. The similarity values of the groupings by region were of 0.81 by the RAPD and 0.72 by SSR markers. Both techniques were efficient in the estimate of the genetic diversity of the accesses.