Produtividade de linhagens de feijoeiro comum sob inoculação com bactérias fixadoras de N e adubação nitrogenada.

Neste trabalho foram avaliados 23 diferentes genótipos de feijoeiro comum, sendo 20 linhagens e três cultivares

Evaluation of distribution and bioaccumulation of arsenic by ICP-MS in tilapia (Oreochromis niloticus) cultivated in different environments.

The concentration of arsenic in tissues of tilapia was evaluated and an estimation of the risks associated with the consumption of this fish was done, taking into account the guidelines established by FAO/WHO. The inductively coupled plasma mass spectrometry (ICP-MS) technique in kinetic energy discrimination (KED) mode was employed and certified reference materials were analyzed with recoveries of 101, 110, and 80% from NIST 1640a (trace elements in water), NIST 1566b (oyster tissue), and DORM-3 (fish protein). In the consumable portion (the muscle fish tissue), the average concentration found was 0.030 ± 0.008 µg g-1, which is below the arsenic maximum level established by international regulatory agencies. The average concentration found in the viscera (stomach, gills, and liver) was 0.485 ± 0.225 µg g-1, concluding that the viscera had greater capacity for the bioaccumulation of arsenic. From this study was possible to monitor the arsenic element in different tilapia specimens evidencing its accumulation throughout the body of the fish

Distribution of annual rainfall in homogeneous regions through data mining techniques in southern Brazil.

This study aimed to transform time series of annual data of precipitation of Rio Grande do Sul in homogeneous precipitation regions through clustering techniques (data mining).Resumo em português: Distribuição da precipitação pluvial anual em regiões homogêneas por meio de mineração de dados, no sul do Brasil. SIC 2015

Projected single-spin flip dynamics in the Ising Model

We study transition matrices for projected dynamics in the energy-magnetization space, magnetization space and energy space. Several single spin flip dynamics are considered such as the Glauber and Metropolis canonical ensemble dynamics and the Metropolis dynamics for three multicanonical ensembles: the flat energy-magnetization histogram, the flat energy histogram and the flat magnetization histogram. From the numerical diagonalization of the matrices for the projected dynamics we obtain the sub-dominant eigenvalue and the largest relaxation times for systems of varying size. Although, the projected dynamics is an approximation to the full state space dynamics comparison with some available results, obtained by other authors, shows that projection in the magnetization space is a reasonably accurate method to study the scaling of relaxation times with system size. The transition matrices for arbitrary single-spin flip dynamics are obtained from a single Monte-Carlo estimate of the infinite temperature transition-matrix, for each system size, which makes the method an efficient tool to evaluate the relative performance of any arbitrary local spin-flip dynamics. We also present new results for appropriately defined average tunnelling times of magnetization and compute their finite-size scaling exponents that we compare with results of energy tunnelling exponents available for the flat energy histogram multicanonical ensemble.Comment: 23 pages and 6 figure

Crescimento do feijoeiro comum em resposta a diferentes épocas de semeadura de adubos verdes.

Frente às preocupações com a intensificação dos processos degradativos do solo, a adubação verde apresenta-se como uma alternativa promissora na busca de sustentabilidade dos solos agrícolas. Dentre as influências da adubação verde sobre a fertilidade do solo destacam-se: a adição de matéria orgânica ao sistema e incremento na fixação biológica de nitrogênio evidenciado em leguminosas

Eficiência simbiótica de diferentes bactérias nodulíferas no feijoeiro-comum.

Foi feito um trabalho em casa de vegetação com o objetivo de avaliar a eficiência simbiótica de estirpes nativas de Rhizobium inoculadas no feijoeiro-comum, cultivar (cv.) Pérola.Pôster - pós-graduação

Fixação biológica de nitrogênio de diferentes cultivares de feijoeiro-comum inoculadas com diferentes estirpes de rhizobium.

Foi realizado um trabalho em vasos em casa de vegetação com o objetivo de avaliar a fixação biológica de nitrogênio de diferentes cultivares de feijoeiro comum inoculadas com diferentes estirpes de Rhizobium.Pôster - pós-graduação

Obtenção e caracterização de isolados de rizóbio capturados por genótipos silvestres de feijoeiro.

O objetivo deste trabalho foi obter e caracterizar morfologicamente isolados de rizóbio capturados por genótipos silvestres de feijoeiro em casa-de-vegetação, em solos oriundos dos Estados de Goiás, Minas Gerais e Paraná