Transformação estável da linhagem celular BTI-Tn-5B1-4 utilizando o gene 25KFP do baculovirus AgMNPV.

bitstream/CENARGEN/29465/1/bp188.pd

A coleção de Pseudocercospora griseola e sua importância para a pesquisa do feijoeiro comum.

O objetivo deste trabalho foi à obtenção, caracterização e manutenção de novos isolados de Pseudocercospora griseola para uso no programa de melhoramento genético da Embrapa.Pôster - graduação

Restoring observed classical behavior of the carbon nanotube field emission enhancement factor from the electronic structure

Experimental Fowler-Nordheim plots taken from orthodoxly behaving carbon nanotube (CNT) field electron emitters are known to be linear. This shows that, for such emitters, there exists a characteristic field enhancement factor (FEF) that is constant for a range of applied voltages and applied macroscopic fields $F_\text{M}$. A constant FEF of this kind can be evaluated for classical CNT emitter models by finite-element and other methods, but (apparently contrary to experiment) several past quantum-mechanical (QM) CNT calculations find FEF-values that vary with $F_\text{M}$. A common feature of most such calculations is that they focus only on deriving the CNT real-charge distributions. Here we report on calculations that use density functional theory (DFT) to derive real-charge distributions, and then use these to generate the related induced-charge distributions and related fields and FEFs. We have analysed three carbon nanostructures involving CNT-like nanoprotrusions of various lengths, and have also simulated geometrically equivalent classical emitter models, using finite-element methods. We find that when the DFT-generated local induced FEFs (LIFEFs) are used, the resulting values are effectively independent of macroscopic field, and behave in the same qualitative manner as the classical FEF-values. Further, there is fair to good quantitative agreement between a characteristic FEF determined classically and the equivalent characteristic LIFEF generated via DFT approaches. Although many issues of detail remain to be explored, this appears to be a significant step forwards in linking classical and QM theories of CNT electrostatics. It also shows clearly that, for ideal CNTs, the known experimental constancy of the FEF value for a range of macroscopic fields can also be found in appropriately developed QM theory.Comment: A slightly revised version has been published - citation below - under a title different from that originally used. The new title is: "Restoring observed classical behavior of the carbon nanotube field emission enhancement factor from the electronic structure

Avaliação da toxicidade crônica de Piraclostrobin, Epoxiconazol e sua mistura em Daphnia similis.

Resumo O presente trabalho avaliou o efeito toxicológico de formulações fungicidas à base de piraclostrobin e epoxiconazol, isoladamente e em formulação conjugada sobre Daphnia similis por 21 dias, através da determinação da Concentração de Efeito Não Observado (CENO) de cada uma das formulações. Em relação à mortalidade de D. similis, foram encontrados valores CENO de 0,098 mg L-1 para a formulação à base de piraclostrobin; 1,324 mg L-1 para a formulação à base de epoxiconazol e 0,341 mg L-1 para a formulação conjugada. Em relação à alteração na relação neonatos/adulto foram encontrados valores CENO de 0,579 mg L-1 para a formulação à base de piraclostrobin; 3,599 mg L-1 para a formulação à base de epoxiconazol e 0,623 mg L-1 para a formulação conjugada. Das três formulações utilizadas, o piraclostrobin isoladamente mostrou-se o mais tóxico para os organismos estudados

Seleção simultânea para três caracteres em progênies de feijoeiro de grãos tipo carioca.

Esse trabalho foi conduzido com o objetivo de obter linhagens de feijoeiro com grãos tipo carioca, de porte ereto e resistentes ao fungo causador da mancha angular

Entanglement Content of Quasiparticle Excitations

We investigate the quantum entanglement content of quasiparticle excitations in extended many-body systems. We show that such excitations give an additive contribution to the bipartite von Neumann and Rényi entanglement entropies that takes a simple, universal form. It is largely independent of the momenta and masses of the excitations and of the geometry, dimension, and connectedness of the entanglement region. The result has a natural quantum information theoretic interpretation as the entanglement of a state where each quasiparticle is associated with two qubits representing their presence within and without the entanglement region, taking into account quantum (in)distinguishability. This applies to any excited state composed of finite numbers of quasiparticles with finite de Broglie wavelengths or finite intrinsic correlation length. This includes particle excitations in massive quantum field theory and gapped lattice systems, and certain highly excited states in conformal field theory and gapless models. We derive this result analytically in one-dimensional massive bosonic and fermionic free field theories and for simple setups in higher dimensions. We provide numerical evidence for the harmonic chain and the two-dimensional harmonic lattice in all regimes where the conditions above apply. Finally, we provide supporting calculations for integrable spin chain models and other interacting cases without particle production. Our results point to new possibilities for creating entangled states using many-body quantum systems

Seleção de linhagens de feijoeiro de grãos tipo carioca, de porte ereto e resistentes a mancha angular.

Esse trabalho foi conduzido com o objetivo de obter linhagens de feijoeiro com grãos tipo carioca, de porte ereto e resistentes ao fungo causador da mancha angular