Quimioterapia das Tripanosomoses ocorrentes no Pantanal.

bitstream/CPAP/56590/1/DOC65.pdfFormato eletrônico

Profilaxia e controle do mal de cadeiras em animais domésticos no Pantanal.

O Trypanosoma evansi foi o primeiro tripanosoma patogênico descoberto. A surra, como a doença é conhecida na Índia, causada pelo T. evansi, há muitos séculos tem sido observada. Porém, foi somente em 1880 que Griffith Evans descobriu organismos móveis semelhantes a espirilos no sangue de cavalos e camelos doentes. Evans descreveu os parasitas em esfregaço frescos e os reconheceu como sendo protozoários. Evans acreditou que a fonte primária da infecção dos cavalos fossem as águas poluídas (Hoare, 1972).bitstream/item/81127/1/DOC66.pd

Basic physical parameters of a selected sample of evolved stars

We present the detailed spectroscopic analysis of 72 evolved stars, including the [Fe/H] determination for the whole sample. These metallicities, together with the Teff values and the absolute V magnitude derived from Hipparcos parallaxes, are used to estimate basic stellar parameters (ages, masses, radii, (B-V)o and log g using theoretical isochrones and a Bayesian estimation method. The (B-V)o values so estimated turn out to be in excellent agreement with the observed (B-V), confirming the reliability of the (Teff,(B-V)o) relation used in the isochrones. The estimated diameters have been compared with limb darkening-corrected ones measured with independent methods, finding an agreement better than 0.3 mas within the 1-10 mas interval. We derive the age-metallicity relation for the solar neighborhood; for the first time such a relation has been derived from observations of field giants rather than from open clusters and field dwarfs and subdwarfs. The age-metallicity relation is characterized by close-to-solar metallicities for stars younger than ~4 Gyr, and by a large [Fe/H] spread with a trend towards lower metallicities for higher ages. We find that the [Fe/H] dispersion of young stars (less than 1 Gyr) is comparable to the observational errors, indicating that stars in the solar neighbourhood are formed from interstellar matter of quite homogeneous chemical composition. The three giants of our sample which have been proposed to host planets are not metal rich, what is at odds with those for main sequence stars. However, two of these stars have masses much larger than a solar mass so we may be sampling a different stellar population from most radial velocity searches for extrasolar planets. We also confirm that the radial velocity variability tends to increase along the RGB.Comment: 17 pgs, 19 fig

Trypanosoma evansi e trypanosoma vivax: biologia, diagnóstico e controle.

Tripanosomoses; Taxonomia; Morfologia; Ciclo vital; Teminologia utiilzada para os tripanosomas baseada no Trypanosoma brucei; Manutenção dos Tripanosomas; Variação molecular em Tripanosomas; Ecologia e sociologia da variação antigênica; Genética de populações de Tripanosomas; Diagnóstico; Caracterização molecular; Métodos de controle; Resistência à drogas; Avaliação do uso do tratamento profilático estratégico ou curativo; Quimioterapia da Tripanosomose por Trypanosoma evansi (tratamento curativo); Quimioterapia da Tripanosomose por Trypanosoma vivax (tratamento curativo); Controle estratégico do Trypanosoma evansi através do uso de drogas tripanocidas; Controle estratégico do Trypanosoma vivax através do uso de drogas tripanocidas; Comparação do Isometamidium e Brometo de Homidium como droga profilática; Mecanismos experimentais de liberação lenta contendo Brometo de Homidium e Isometamidium; Análise econômica; Controle dos vetores; Controle através do uso de inseticidas; Piretroides; Utilização de armadilhas impregnadas com inseticidas

Explaining the Higgs Decays at the LHC with an Extended Electroweak Model

We show that the recent discovery of a new boson at the LHC, which we assume to be a Higgs boson, and the observed enhancement in its diphoton decays compared to the SM prediction, can be explained by a new doublet of charged vector bosons from an extended electroweak gauge sector model with SU(3)_C\otimesSU(3)_L\otimesU(1)_X symmetry. Our results show a good agreement between our theoretical expected sensitivity to a 126--125 GeV Higgs boson and the experimental significance observed in the diphoton channel at the 8 TeV LHC. Effects of an invisible decay channel for the Higgs boson are also taken into account, in order to anticipate a possible confirmation of deficits in the branching ratios into $ZZ^*$, $WW^*$, bottom quarks, and tau leptons.Comment: 16 pages, 5 figure

Charge-transfer metal-insulator transitions in the spin-one-half Falicov-Kimball model

The spin-one-half Falicov-Kimball model is solved exactly on an infinite-coordination-number Bethe lattice in the thermodynamic limit. This model is a paradigm for a charge-transfer metal-insulator transition where the occupancy of localized and delocalized electronic orbitals rapidly changes at the metal-insulator transition (rather than the character of the electronic states changing from insulating to metallic as in a Mott-Hubbard transition). The exact solution displays both continuous and discontinuous (first-order) transitions.Comment: 22 pages including 4 figures(eps), RevTe

Acompanhamento das tecnologias apícolas adotadas em assentamentos rurais de Corumbá, MS.

A Embrapa Pantanal executa desde março de 2009 um projeto de pesquisa participativa em dois Assentamentos Rurais de Corumbá/MS em parceria com a AAPAN, AGRAER, Fundação Terra do Pantanal e com alguns assentados, com o objetivo de avaliar as tecnologias apícolas adotadas, propor ajustes e inclusões ao sistema produtivo. Diversas revisões foram realizadas nas colônias de abelhas africanizadas (Apis mellifera) em três apiários, sendo constatadas a despadronização e inadequações na qualidade e no acabamento da madeira utilizada na confecção das colmeias, na localização, na mobilidade e na infra-estrutura nos apiários. Uma assentada com a assistência técnica da Embrapa Pantanal substituiu as suas colmeias rústicas pelo modelo padrão e em todos os apiários foram adotados alguns ajustes nas demais restrições identificadas. No entanto, a adoção de outras tecnologias é limitada devido ao restrito acesso dos assentados a financiamentos, insumos e materiais apícolas de qualidade na região.Disponível também em: Cadernos de Agroecologia, V. 5, n.1, 2010

The Effect of Transposable Element Insertions on Gene Expression Evolution in Rodents

Background:Many genomes contain a substantial number of transposable elements (TEs), a few of which are known to be involved in regulating gene expression. However, recent observations suggest that TEs may have played a very important role in the evolution of gene expression because many conserved non-genic sequences, some of which are know to be involved in gene regulation, resemble TEs. Results:Here we investigate whether new TE insertions affect gene expression profiles by testing whether gene expression divergence between mouse and rat is correlated to the numbers of new transposable elements inserted near genes. We show that expression divergence is significantly correlated to the number of new LTR and SINE elements, but not to the numbers of LINEs. We also show that expression divergence is not significantly correlated to the numbers of ancestral TEs in most cases, which suggests that the correlations between expression divergence and the numbers of new TEs are causal in nature. We quantify the effect and estimate that TE insertion has accounted for ~20% (95% confidence interval: 12% to 26%) of all expression profile divergence in rodents. Conclusions:We conclude that TE insertions may have had a major impact on the evolution of gene expression levels in rodents