GRB Observed by IBIS/PICsIT in the MeV Energy Range

We present the preliminary results of a systematic search for GRB and other transients in the publicly available data for the IBIS/PICsIT (0.2-10 MeV) detector on board INTEGRAL. Lightcurves in 2-8 energy bands with time resolution from 1 to 62.5 ms have been collected and an analysis of spectral and temporal characteristics has been performed. This is the nucleus of a forthcoming first catalog of GRB observed by PICsIT.Comment: 6 pages, 3 figures. Poster presented at COSPAR 2008. Advaces in Space Research, accepted for publicatio

Eficiência do pó de alho (Allium sativum L.) no controle dos parasitos de bovinos.

Nos últimos anos, a Embrapa Gado de Corte tem recebido inúmeras indagações por carta, telefone, em palestras etc. sobre a utilização do alho, em especial, no controle da mosca-dos- chifres (Haematobia irritans irritans) em bovinos. O principal objetivo do experimento foi verificar a eficácia do alho em pó, adicionado ao sal mineral, no controle de mosca-dos-chifres, carrapatos (Boophilus microplus) e helmintos de bovinos. Foram utilizados 42 novilhos cruzados, distribuídos em dois grupos de 21 animais, levando-se em consideração a raça, o peso, ovos por grama de fezes (OPH), numero de moscas, idade e o numero de carrapatos. Durante todo o período experimental, os grupos ficaram em piquetes separados com pastagens de Brachiaria decumbens. Um grupo de animais (Grupo 1) recebeu sal mineral mais 2% de alho em pó, e o outro (Grupo 2), somente sal mineral. A cada 28 dias os animais eram pesados. A cada catorze dias eram feitas coletas de fezes e contagens de mosca-dos-chifres e de carrapato. O consumo médio de sal mineral durante o experimento foi de 121 gramas/animal/dia para o Grupo 1 e de 112 gramas/animal/dia para o Grupo 2. O numero de carrapatos, durante todo o período experimental, foi de 4,3 teleoginas/animal/dia para o grupo 2. Não houve diferenças significativas (P>0,05) entre as populações de carrapatos dos dois grupos. A media geral de moscas dos grupos durante todo o período experimental foi de 97 a 82 para o Grupo 1 e 2, respectivamente. Não houve diferença significativa entre as medias dos grupos (P>0,05). A media geral do OPG foi de 219 e 416, respectivamente, para o Grupo 1 e 2, diferindo significativamente entre si (P<0,05). O alho em pó adicionado em proporção correspondente a 2% da formulação mineral e fornecido ad libitum aos bovinos, não diminuiu a população de carrapato-do-boi e da mosca-dos-chifres. A redução de 47,3% no OPG e pequena para que o alho seja considerado eficiente contra os nematóides gastrintestinais de bovinos.bitstream/item/132264/1/BP-8.pd

Potencial forrageiro da Brachiaria brizantha cv. Marandu sob diferentes cargas animal e dosificacao com anti-helmitico em solo de cerrado.

bitstream/item/137570/1/PESQ-EM-ANDAMENTO-25.pdfCNPGC

Contextual factors among indiscriminate or larger attacks on food or water supplies, 1946-2015

This research updates previous inventories of malicious attacks on food and water to include data from 1946 through mid-2015. A systematic search of news reports, databases and previous inventories of poisoning events was undertaken. Incidents that threatened or were intended to achieve direct harm to humans, and that were either relatively large (number of victims > 4 or indiscriminate in intent or realisation were included. Agents could be chemical, biological or radio-nuclear. Reports of candidate incidents were subjected to systematic inclusion and exclusion criteria as well as validity analysis (not always clearly undertaken in previous inventories of such attacks). We summarise contextual aspects of the attacks that may be important for scenario prioritisation, modelling and defensive preparedness. Opportunity is key to most realised attacks, particularly access to dangerous agents. The most common motives and relative success rate in causing harm were very different between food and water attacks. The likelihood that people were made ill or died also varied by food/water mode, and according to motive and opportunity for delivery of the hazardous agent. Deaths and illness associated with attacks during food manufacture and prior to sale have been fewer than those in some other contexts. Valuable opportunities for food defence improvements are identified in other contexts, especially food prepared in private or community settings

An active state of the BL Lac Object Markarian 421 detected by INTEGRAL in April 2013

Multiwavelength variability of blazars offers indirect insight into their powerful engines and on the mechanisms through which energy is propagated from the centre down the jet. The BL Lac object Mkn 421 is a TeV emitter, a bright blazar at all wavelengths, and therefore an excellent target for variability studies. Mkn 421 was observed by INTEGRAL and Fermi-LAT in an active state on 16-21 April 2013. Well sampled optical, soft, and hard X-ray light curves show the presence of two flares. The average flux in the 20-100 keV range is 9.1e-11 erg/s/cm2 (~4.5 mCrab) and the nuclear average apparent magnitude, corrected for Galactic extinction, is V ~12.2. In the time-resolved X-ray spectra (3.5-60 keV), which are described by broken power laws and, marginally better, by log-parabolic laws, we see a hardening that correlates with flux increase, as expected in refreshed energy injections in a population of electrons that later cool via synchrotron radiation. The hardness ratios between the JEM-X fluxes in two different bands and between the JEM-X and IBIS/ISGRI fluxes confirm this trend. During the observation, the variability level increases monotonically from the optical to the hard X-rays, while the large LAT errors do not allow a significant assessment of the MeV-GeV variability. The cross-correlation analysis during the onset of the most prominent flare suggests a monotonically increasing delay of the lower frequency emission with respect to that at higher frequency, with a maximum time-lag of about 70 minutes, that is however not well constrained. The spectral energy distributions from the optical to the TeV domain are satisfactorily described by homogeneous models of blazar emission based on synchrotron radiation and synchrotron self-Compton scattering, except in the state corresponding to the LAT softest spectrum and highest flux.Comment: 11 pages, 6 figures, in press in A&

Surtos da mosca-dos-estábulos, Stomoxys calcitrans, em Mato Grosso do Sul: novo problema para as cadeias produtivas da carne e sucroalcooleira?

No presente documento é registrada a ocorrência de infestações preocupantes pela mosca-dos-estábulos, Stomoxys calcitrans L. (Diptera: Muscidae), em propriedades pecuárias próximas de usinas sucroalcooleiras na região Sul de Mato Grosso do Sul, no ano de 2009. A biologia do inseto; sua importância epidemiológica, econômica e veterinária e; possíveis alternativas de controle são apresentadas e discutidas. Entre as alternativas de controle sugere-se, em especial, o revolvimento completo duas vezes por semana do material de compostagem nas usinas e a drenagem do local onde é executada, assim como o enterrio parcial da palha pós-colheita da cana-de-açúcar com uso de cultivador. Nas propriedades pecuárias recomenda-se a limpeza de locais de criação da mosca, representado por acúmulo de dejetos de animais domésticos e ou de resíduos alimentares, especialmente em confinamentos e leiterias, dentre outras recomendações. Somente com ações integradas será possível resolver o problema e contribuir para o desenvolvimento sustentável de duas importantes cadeias produtivas do agronegócio brasileiro.bitstream/CNPGC-2010/12957/1/DOC175.pd

The changing look of PKS 2149-306

Aims: We study the blazar nature of the high-redshift Flat-Spectrum Radio Quasar PKS 2149-306 (z = 2.345) by investigating its long-term behavior. Methods: We analyzed all publicly available optical-to-X-ray observations performed by XMM-Newton, Swift, and INTEGRAL. Conclusions: PKS 2149-306 is one of four blazars at z>2 that have been observed in the hard-X-ray regime with both the BAT and ISGRI instruments. Observations acquired almost 1 year apart in the 60-300 keV energy band in the object rest frame, exhibit no noticeable change in spectral slope associated with a flux variation of more than a factor of two. Swift data appear to show a roll-off below ~1 keV, which becomes increasingly evident during a ~3-day time-frame, that can be explained as the natural spectral break caused by the Inverse Compton onset. The broad-band spectra allow us to identify two different states. The SED modeling suggests that they can be interpreted by only a change in the bulk Lorentz factor of the jet.Comment: 7 pages, 2 figures. A&A accepted for publicatio

Epidemiologia dos nematódeos gastrintestinais em bovinos de corte nos cerrados e o controle estratégico no Brasil.

Prevalência das espécies. OPG e imunidade adquirida. Larvas na pastagem. Hipobiose. Mortalidade de animais. Integração entre os helmintos do abomaso. Anorexia. Faixa etária, prejuízos e controle. Custo/Benefício.bitstream/item/104809/1/Epidemiologia-dos-nematoideos-gastrintestinais.pd