4,338 research outputs found

    CMF 056: genótipo de mamoeiro com potencial para cultivo no Ceará.

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    Disponivel no site da Embrapa Agroindustria Tropical

    Avaliação de genótipos de feijão-de-corda sob infecção simultânea por "cowpea aphid-borne mosaic virus" e "cucumber mosaic virus".

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    Avaliacao genotipos feijao-de-corda sob infeccao simultanea;tem se intensificado, no Estado do Ceara, a infeccao simultanea em feijao-de-corda, Vigna unguiculata(L.)Walp., pelo Potyvirus CpAMV e pelo Cucumovirus CMV, que afetam drasticamente o rendimento da cultura nas principaisregioes produtoras.Visando solucionar o problema, executou-se um trabalho em campo no municipio de Brejo Santo, CE; adotou-se o delineamentoem blocos completos casualizados com quatro repeticoes;coletaram-se amostras de plantas infectadas de cada parcela para exame em laboratorioe os dados para as variaveis...bitstream/CNPAT-2010/4777/1/Bp-025.pd

    Desempenho de linhagens de feijão-de-corda sob condição de sequeiro.

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    Desempenho de linhagens de feijao-de-corda sob condicao de sequeirabitstream/CNPAT-2010/5402/1/Pa-050.pd

    Equation of state and transport processes in self--similar spheres

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    We study the effect of transport processes (diffusion and free--streaming) on a collapsing spherically symmetric distribution of matter in a self--similar space--time. A very simple solution shows interesting features when it is matched with the Vaidya exterior solution. In the mixed case (diffusion and free--streaming), we find a barotropic equation of state in the stationary regime. In the diffusion approximation the gravitational potential at the surface is always constant; if we perturb the stationary state, the system is very stable, recovering the barotropic equation of state as time progresses. In the free--streaming case the self--similar evolution is stationary but with a non--barotropic equation of state.Comment: 9 pages, 2 figure

    Identificacao de fontes de resistencia a xanthomonas vignicola, agente causal da mancha bacteriana do Caupi.

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    Abstract; Introducao; Material e Metodos; Resultados e Discussao; Conclusoes.bitstream/CNPAT-2010/6362/1/Bp-028.pd

    More Discriminants with the Brezing-Weng Method

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    The Brezing-Weng method is a general framework to generate families of pairing-friendly elliptic curves. Here, we introduce an improvement which can be used to generate more curves with larger discriminants. Apart from the number of curves this yields, it provides an easy way to avoid endomorphism rings with small class number

    Reação de genótipos de feijão-de-corda ao ataque da cigarrinha-verde, no Estado do Ceará.

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    Abstract; Introducao; Material e metodos; Resultados e discussao; Conclusoes.bitstream/CNPAT-2010/6363/1/Bp-030.pd

    Production of Charged Higgs Bosons in a 3-3-1 Model at the CERN LHC

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    We perform a study of the charged Higgs production from an SU(3)CSU(3)LU(1)XSU(3)_{C}\otimes SU(3)_{L}\otimes U(1)_{X} model with right-handed neutrinos, postulating a custodial symmetry which reduces the number of free parameters in the scalar potential. We compute the cross sections for charged scalars for typical and new production modes. One of the new SU(3)LSU(3)_{L} neutral gauge bosons, ZZ^{\prime}, affects some production cross sections distinguishing the model from other Standard Model extensions like, for example, the Minimal Supersymmetric Standard Model and general two Higgs doublets models. The interplay between the Higgs sector of the model and that ZZ^{\prime} gauge boson enhances substantialy all the production rates of the lightest charged Higgs boson, H1±H_{1}^{\pm}, at hadron colliders compared to the MSSM. We found that a large portion of the parameters space can be probed at the LHC running at 14 TeV center-of-mass energy in the associated ppW±H1+Xpp\rightarrow W^{\pm}H_{1}^{\mp}+X production channel in the low luminosity run stage of the experiment.Comment: 30 pages, 20 figures, accepted for publication in Phys. Rev.

    Self-similar and charged spheres in the diffusion approximation

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    We study spherical, charged and self--similar distributions of matter in the diffusion approximation. We propose a simple, dynamic but physically meaningful solution. For such a solution we obtain a model in which the distribution becomes static and changes to dust. The collapse is halted with damped mass oscillations about the absolute value of the total charge.Comment: 15 pages, 7 figure

    The Kinematically Measured Pattern Speeds of NGC 2523 and NGC 4245

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    We have applied the Tremaine-Weinberg continuity equation method to derive the bar pattern speed in the SB(r)b galaxy NGC 2523 and the SB(r)0/a galaxy NGC 4245 using the Calcium Triplet absorption lines. These galaxies were selected because they have strong inner rings which can be used as independent tracers of the pattern speed. The pattern speed of NGC 2523 is 26.4 ±\pm 6.1 km s1^{-1} kpc1^{-1}, assuming an inclination of 49.7^{\circ} and a distance of 51.0 Mpc. The pattern speed of NGC 4245 is 75.5 ±\pm 31.3 km s1^{-1} kpc1^{-1}, assuming an inclination of 35.4^{\circ} and a distance of 12.6 Mpc. The ratio of the corotation radius to the bar radius of NGC 2523 and NGC 4245 is 1.4 ±\pm 0.3 and 1.1 ±\pm 0.5, respectively. These values place the bright inner rings near and slightly inside the corotation radius, as predicted by barred galaxy theory. Within the uncertainties, both galaxies are found to have fast bars that likely indicate dark halos of low central concentration. The photometric properties, bar strengths, and disk stabilities of both galaxies are also discussed.Comment: Accepted for publication in The Astronomical Journal, 11 figures, 2 table
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