Abelhas melíferas: bioindicadores de qualidade ambiental e de sustentabilidade da agricultura familiar de base ecológica.

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Abelhas melíferas: bioindicadores de qualidade ambiental e de sustentabilidade da agricultura familiar de base ecológica.

Apicultura no Brasil. Ação das abelhas. Vida das abelhas. Fisiologia das abelhas. Ciclo de vida das abelhas. Processo de enxameação. Danças das abelhas. Polinização. Espécies de plantas espontâneas. Espécies de plantas cultivadas. Contaminação ambiental. Exposição aos agrotóxicos. Bioindicadores. Criação de abelhas melíferas. Manejo das colméiasbitstream/CNPUV-2009-09/11386/1/documento_244.pd

Evidence for entanglement at high temperatures in an engineered molecular magnet

The molecular compound [Fe$_{2}$($\mu_{2}$-oxo)(C$_{3}$H$_{4}$N$_{2}$)$_{6}$(C$_{2}$O$_{4}$)$_{2}$] was designed and synthesized for the first time and its structure was determined using single-crystal X-ray diffraction. The magnetic susceptibility of this compound was measured from 2 to 300 K. The analysis of the susceptibility data using protocols developed for other spin singlet ground-state systems indicates that the quantum entanglement would remain at temperatures up to 732 K, significantly above the highest entanglement temperature reported to date. The large gap between the ground state and the first-excited state (282 K) suggests that the spin system may be somewhat immune to decohering mechanisms. Our measurements strongly suggest that molecular magnets are promising candidate platforms for quantum information processing

Final state interaction in D+→K−π+π+D^+\to K^-\pi^+\pi^+ with KπK\pi I=1/2 and 3/2 channels

The final state interaction contribution to $D^+$ decays is computed for the $K^-\pi^+\pi^+$ channel within a light-front relativistic three-body model for the final state interaction. The rescattering process between the kaon and two pions in the decay channel is considered. The off-shell decay amplitude is a solution of a four-dimensional Bethe-Salpeter equation, which is decomposed in a Faddeev form. The projection onto the light-front of the coupled set of integral equations is performed via a quasi-potential approach. The S-wave $K\pi$ interaction is introduced in the resonant isospin $1/2$ and the non-resonant isospin $3/2$ channels. The numerical solution of the light-front tridimensional inhomogeneous integral equations for the Faddeev components of the decay amplitude is performed perturbatively. The loop-expansion converges fast, and the three-loop contribution can be neglected in respect to the two-loop results for the practical application. The dependence on the model parameters in respect to the input amplitude at the partonic level is exploited and the phase found in the experimental analysis, is fitted with an appropriate choice of the real weights of the isospin components of the partonic amplitude. The data suggests a small mixture of total isospin $5/2$ to the dominant $3/2$ one. The modulus of the unsymmetrized decay amplitude, which presents a deep valley and a following increase for $K\pi$ masses above $1.5$ GeV, is fairly reproduced. This suggests the assignment of the quantum numbers $0^+$ to the isospin 1/2 $K^*(1630)$ resonance

Fundamentos para o desenvolvimento seguro da apicultura com abelhas africanizadas.

Espera-se que este trabalho possa contribuir para conscientizar apicultores e demais profissionais expostos à ação das abelhas africanizadas sobre a importância de se minimizar os riscos potenciais das abelhas africanizadas. Dessa forma, para facilitar a compreensão e a organização desse material, o mesmo foi dividido em três partes: A primeira refere-se as abelhas africanizadas enfocando seu histórico, comportamento e suas características que são fundamentais para o desenvolvimento das atividades dos profissionais que atuam na área. Na segunda, são estudados os pré-requisitos legais de segurança e medicina do trabalho de acordo com a Lei n.º 6.514/77 da Consolidação das Leis do Trabalho, a Portaria n.º 3.214/78 das Normas Regulamentadoras e a Portaria n.º 3.067/88 das Normas Regulamentadoras Rurais do Ministério do Trabalho para efeito de cumprimento da legislação pertinente ao assunto (MANUAL ..., 2003). Na terceira, são analisados os riscos presentes no ambiente de trabalho, evidenciando-se os seus prováveis efeitos e buscando-se gerenciá-los para que sejam minimizados ao máximo.bitstream/item/56920/1/DOC118-lancado.pd

Procedimentos de segurança no desenvolvimento da apicultura com abelhas africanizadas (Apis mellifera L.).

bitstream/CPAP/56597/1/CT64.pdfFormato Eletrônico

Principais oportunidades para a expansão da apicultura.

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Bayesian estimation of species divergence times using correlated quantitative characters

Discrete morphological data have been widely used to study species evolution, but the use of quantitative (or continuous) morphological characters is less common. Here, we implement a Bayesian method to estimate species divergence times using quantitative characters. Quantitative character evolution is modelled using Brownian diffusion with character correlation and character variation within populations. Through simulations, we demonstrate that ignoring the population variation (or population “noise”) and the correlation among characters leads to biased estimates of divergence times and rate, especially if the correlation and population noise are high. We apply our new method to the analysis of quantitative characters (cranium landmarks) and molecular data from carnivoran mammals. Our results show that time estimates are affected by whether the correlations and population noise are accounted for or ignored in the analysis. The estimates are also affected by the type of data analysed, with analyses of morphological characters only, molecular data only, or a combination of both; showing noticeable differences among the time estimates. Rate variation of morphological characters among the carnivoran species appears to be very high, with Bayesian model selection indicating that the independent-rates model fits the morphological data better than the autocorrelated-rates model. We suggest that using morphological continuous characters, together with molecular data, can bring a new perspective to the study of species evolution. Our new model is implemented in the MCMCtree computer program for Bayesian inference of divergence times