Fungos associados à pluma e às sementes de algodão com línter.

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Spillover and diffraction sidelobe contamination in a double-shielded experiment for mapping Galactic synchrotron emission

We have analyzed observations from a radioastronomical experiment to survey the sky at decimetric wavelengths along with feed pattern measurements in order to account for the level of ground contamination entering the sidelobes. A major asset of the experiment is the use of a wire mesh fence around the rim-halo shielded antenna with the purpose of levelling out and reducing this source of stray radiation for zenith-centered 1-rpm circular scans. We investigate the shielding performance of the experiment by means of a geometric diffraction model in order to predict the level of the spillover and diffraction sidelobes in the direction of the ground. Using 408 MHz and 1465 MHz feed measurements, the model shows how a weakly-diffracting and unshielded antenna configuration becomes strongly-diffracting and double-shielded as far-field diffraction effects give way to near-field ones. Due to the asymmetric response of the feeds, the orientation of their radiation fields with respect to the secondary must be known a priori before comparing model predictions with observational data. By adjusting the attenuation coefficient of the wire mesh the model is able to reproduce the amount of differential ground pick-up observed during test measurements at 1465 MHz.Comment: 14 pages, 17 eps + 1 gif figures and 4 Tables. Accepted for publication in A&AS. Fig.7 available at full resolution from http://www.das.inpe.br/~tello/publications.ht

Avaliação do desempenho ambiental de inovações tecnológicas agroindustriais: conceitos e métodos.

Inovações tecnológicas; Questões ambientais relacionadas às atividades agroindustriais; Estruturação de um método multicritério de avaliação de desenpenho ambiental; Métodos de avaliação ambiental de inovações agroindustriais; Análise comparativa dos métodos.bitstream/item/33966/1/DO10001.pd

Identificação através de PCR dos genes Cryl de cepas de Bacillus thuringiensis Berliner eficientes contra a lagarta do cartucho, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae).

Fall armyworm, Spodoptera frugiperda (J.E. Smith), is the most important maize insect pest in Brazil and its damage can reduce yield up to 34%. The objective of this work was to utilize the PCR technique to identify Bacillus thuringiensis (B.t) strains that control S. frugiperda in maize crops. Biossays showed that 16 strains were very effective against S. frugiperda, 15 of them collected from soil samples and one (T09) obtained at the Institute Pasteur. The DNA of these strains were probed with cryl general primers and their proteins were analyzed by SDS-PAGE eletrophoresis. All strains present positive results for cryl genes. To further characterize these strains, specific cryl primers were empolyed. PCR technique showed that some strains harbour the same cryl genes. The only difference was the amplification of an unexpected fragment of approximately 160bp when a mixture of cry1B and cry1D specific primers was used. Analysis by phase contrast microscope showed that crystal proteins produced by these strains were all bipyramidal crystals. Also, eltrophoretic analysis of proteins by SDS-PAGE showed the same protein banding pattern for most of the strains

Discrepancies in Determinations of the Ginzburg-Landau Parameter

Long-standing discrepancies within determinations of the Ginzburg-Landau parameter $\kappa$ from supercritical field measurements on superconducting microspheres are reexamined. The discrepancy in tin is shown to result from differing methods of analyses, whereas the discrepancy in indium is a consequence of significantly differing experimental results. The reanalyses however confirms the lower $\kappa$ determinations to within experimental uncertainties.Comment: submitted to Phys. Rev.

Supplementation levels for growing beef cattle grazing in the dry-rainy transition season.

The objective of this experiment was to study the effects of different levels of supplementation on the performance, intake, digestibility, pH and rumen ammonia concentration in growing bulls grazing Brachiaria decumbens Stapf. pasture, during the dry-rainy transition season. For evaluation of performance, intake and digestibility, it was used 25 non-castrated steers at 11 months of age and initial average body weight of 270 kg, grouped in five plots of five animals each, following a completely randomized design. Each plot received one of the following feeding treatments: mineral mixture and supplement at the proportion of 0.5, 1.0, 1.5 and 2.0 kg/animal/day, corresponding to 0.18, 0.36, 0.54 and 0.72% of the average body weight of the animals. The area designated for the animals was constituted of five 2.0-ha paddocks. For the evaluation of the pH and rumen ammonia concentration, five crossbred non-castrated steers were used, with average body weight of 240 kg, fistulated in the esophagus, rumen and abomasum, disposed in a 5 × 5 Latin square, with five treatments and five experimental periods. Animal performance behaved in a positive linear manner according to the supplementation levels, responding with an increase of more than 80% on weight gains of the animals. Intakes of total and pasture dry matter (DM), organic matter and neutral detergent fiber were not influenced by supplementation. Intakes of crude protein, nonfibrous carbohydrates, ether extract and total digestible nutrients as well as nutrient digestibility and rumen ammonia concentration showed a positive linear pattern in response to supplementation levels. Increasing levels of concentrate supplementation influence positively the performance of bulls growing on pastures during the dry-rainy transition season

Biomonitoramento de abelhas da subtribo euglossina (Hymenoptera: Apoidea) em um plantio de castanheira-do-brasil (Bertholletia excelsa Bonpl., Lecythidaceae) em Belém, Pará.

Com a finalidade de conhecer a biodiversidade de abelhas da subtribo Euglossina em áreas cultivadas com castanheira-do-brasil (Bertholletia excelsa Bonpl.), foi realizado monitoramento mensal em: um monocultivo de castanheira-do-brasil, e áreas adjacentes ao plantio monocultivo de mandioca (Manihot esculenta Crantz) e uma área de Capoeira antiga (com cerca de 20 anos), localizadas na Embrapa Amazônia Oriental, no município de Belém, estado do Pará, de setembro/2010 a abril/2011. Foram utilizadas armadilhas aromáticas para a captura de abelhas euglossinas e para outros grupos de abelhas foram utilizados pratos-armadilha (pan-traps). Foram coletadas 1293 abelhas com armadilhas aromáticas, distribuídos entre os gêneros Euglossa, Eulaema, Exaerete, Eufriesea e Trigona. Os pan-traps capturaram um total de 95 espécimes, dos quais 74 pertencentes à família Apidae e outras 21 ainda não identificadas. Em uma analise preliminar foi observado que o prato de cor azul foi o que aprisionou um maior número de abelhas, correspondendo a 84,21% do total de abelhas coletadas, seguido do prato de cor amarelo com 8,42% abelhas coletadas e o branco com 7,37% abelhas. A maior diversidade de espécimes capturada ocorreu no ambiente de capoeira, seguido do monocultivo de mandioca e monocultivo de castanheira-do-brasil.PIBIC-2011