Parasitos de tambaqui Colossoma macropomum cultivados em pisciculturas de Macapá, Estado do Amapá.

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Parasitofauna do apaiari Astronotus ocellatus Cope, 1872 (Cichlidae) coletados no Rio Preto, região de Mazagão, Estado do Amapá.

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Metazoários e protozoários parasitando tilápias do Nilo Oreochromis niloticus (Cichlidae) cultivadas em Macapá (AP), Amazônia Oriental.

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The ALFA Zone of Avoidance Survey: Results from the Precursor Observations

The Arecibo L-band Feed Array Zone of Avoidance Survey (ALFA ZOA) will map 1350-1800 square degrees at low Galactic latitude, providing HI spectra for galaxies in regions of the sky where our knowledge of local large scale structure remains incomplete, owing to obscuration from dust and high stellar confusion near the Galactic plane. Because of these effects, a substantial fraction of the galaxies detected in the survey will have no optical or infrared counterparts. However, near infrared follow up observations of ALFA ZOA sources found in regions of lowest obscuration could reveal whether some of these sources could be objects in which little or no star formation has taken place ("dark galaxies"). We present here the results of ALFA ZOA precursor observations on two patches of sky totaling 140 square degrees (near l=40 degrees, and l=192 degrees). We have measured HI parameters for detections from these observations, and cross-correlated with the NASA/IPAC Extragalactic Database (NED). A significant fraction of the objects have never been detected at any wavelength. For those galaxies that have been previously detected, a significant fraction have no previously known redshift, and no previous HI detection.Comment: To appear in Proceedings of IAU Symp #244, "Dark Galaxies and Lost Baryons", June 2007, 2 pages, including 1 figur

Detecção de um Emaravirus-like em amendoim forrageiro por sequenciamento de alto desempenho.

O objetivo deste trabalho foi identificar as espécies de fitovírus presentes em genótipos de amendoim forrageiro através do sequenciamento de alto desempenho (Next-Generation Sequencing-NGS) e microscopia eletrônica de transmissão

Genoma completo do Peanut mottle virus infectando amendoim forrageiro.

O objetivo deste trabalho foi sequenciar o genoma completo do PeMoV por meio do sequenciamento de alto desempenho (Next-Generation Sequencing-NGS)

Multi-phonon Resonant Raman Scattering Predicted in LaMnO3 from the Franck-Condon Process via Self-Trapped Excitons

Resonant behavior of the Raman process is predicted when the laser frequency is close to the orbital excitation energy of LaMnO3 at 2 eV. The incident photon creates a vibrationally excited self-trapped ``orbiton'' state from the orbitally-ordered Jahn-Teller (JT) ground state. Trapping occurs by local oxygen rearrangement. Then the Franck-Condon mechanism activates multiphonon Raman scattering. The amplitude of the $n$-phonon process is first order in the electron-phonon coupling $g$. The resonance occurs {\it via} a dipole forbidden $d$ to $d$ transition. We previously suggested that this transition (also seen in optical reflectivity) becomes allowed because of asymmetric oxygen fluctuations. Here we calculate the magnitude of the corresponding matrix element using local spin-density functional theory. This calculation agrees to better than a factor of two with our previous value extracted from experiment. This allows us to calculate the absolute value of the Raman tensor for multiphonon scattering. Observation of this effect would be a direct confirmation of the importance of the JT electron-phonon term and the presence of self-trapped orbital excitons, or ``orbitons''.Comment: 8 pages and 3 embedded figures. The earlier short version is now replaced by a more complete paper with a slightly different title. This version includes a caculation by density-functional theory of the dipole matrix element for exciting the self-trapped orbital exciton which activates the multiphonon Raman signal