887 research outputs found

    Isolamento via PCR heterólogo de alelos de genes codificadores de enzimas da via biossintética de carotenóides em melancia.

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    Trabalho apresentado no Congresso Brasileiro de Olericultura, 50., 2010, Guarapari. Cinquenta anos contribuindo para a saúde da população brasileira. Trabalho A3091-T5102

    First report of groundnut ringspot orthotospovirus infecting field pea (Pisum sativum L.) crop in Brazil.

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    Field pea (Pisum sativum L.) cultivar Axé with symptoms of orthotospovirus infection (~5% incidence) were collected under open field conditions in Brasília-DF, Central Brazil. Ten leaf samples displaying apical chlorosis, necrosis, and deformation were evaluated via serology (ELISA) using antisera (produced at Embrapa Vegetable Crops) specific to the nucleocapsid (N) protein of three Orthotospovirus species: Tomato chlorotic spot orthotospovirus (TCSV), Tomato spotted wilt orthotospovirus (TSWV), and Groundnut ringspot orthotospovirus (GRSV)

    On the use of the group SO(4,2) in atomic and molecular physics

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    In this paper the dynamical noninvariance group SO(4,2) for a hydrogen-like atom is derived through two different approaches. The first one is by an established traditional ascent process starting from the symmetry group SO(3). This approach is presented in a mathematically oriented original way with a special emphasis on maximally superintegrable systems, N-dimensional extension and little groups. The second approach is by a new symmetry descent process starting from the noninvariance dynamical group Sp(8,R) for a four-dimensional harmonic oscillator. It is based on the little known concept of a Lie algebra under constraints and corresponds in some sense to a symmetry breaking mechanism. This paper ends with a brief discussion of the interest of SO(4,2) for a new group-theoretical approach to the periodic table of chemical elements. In this connection, a general ongoing programme based on the use of a complete set of commuting operators is briefly described. It is believed that the present paper could be useful not only to the atomic and molecular community but also to people working in theoretical and mathematical physics.Comment: 31 page

    Caracterização molecular e morfológica do agente etiológico da pinta preta em solanáceas no Brasil.

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    Este trabalho objetivou realizar a caracterização molecular e morfológica de isolados de Alternaria obtidos de solanáceas.Resumo 504_1
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