Cosmological scenarios from multiquintessence

In this work we derive and analyse cosmological scenarios coming from multi-component scalar field models. We consider a direct sum of a sine-Gordon with a Z2 model, and also a combination of those with a BNRT model. Moreover, we work with a modified version of the BNRT model, which breaks the Z2 x Z2 symmetry of the original BNRT potential, coupled with the sine-Gordon and with the standard Z2 models. We show that our approach can be straightforwardly elevated to $N$ fields. All the computations are made analytically and some parameters restriction is put forward in order to get in touch with complete and realistic cosmological scenarios

Prevalence and epidemiologic features of polypoidal choroidal vasculopathy in southeastern Brazil

IBOL, Rio de Janeiro, BrazilUniv Fed Rio de Janeiro, Rio de Janeiro, BrazilUniversidade Federal de São Paulo, São Paulo, BrazilCleveland Clin, Cole Eye Inst, Cleveland, OH 44106 USAUniversidade Federal de São Paulo, São Paulo, BrazilWeb of Scienc

Suplementação energética de ovelhas na última semana pré-parto aumenta a sobrevivência de cordeiros.

Qaundo e quanto suplementar; Um exemplo prático

Different serological cross-reactivity of Trypanosoma rangeli forms in Trypanosoma cruzi-infected patients sera

<p>Abstract</p> <p>Background</p> <p>American Trypanosomiasis or Chagas disease is caused by <it>Trypanosoma cruzi </it>which currently infects approximately 16 million people in the Americas causing high morbidity and mortality. Diagnosis of American trypanosomiasis relies on serology, primarily using indirect immunofluorescence assay (IFA) with <it>T. cruzi </it>epimastigote forms. The closely related but nonpathogenic <it>Trypanosoma rangeli </it>has a sympatric distribution with <it>T. cruzi </it>and is carried by the same vectors. As a result false positives are frequently generated. This confounding factor leads to increased diagnostic test costs and where false positives are not caught, endangers human health due to the toxicity of the drugs used to treat Chagas disease.</p> <p>Results</p> <p>In the present study, serologic cross-reactivity between the two species was compared for the currently used epimastigote form and the more pathologically relevant trypomastigote form, using IFA and immunoblotting (IB) assays. Our results reveal an important decrease in cross reactivity when <it>T. rangeli </it>culture-derived trypomastigotes are used in IFA based diagnosis of Chagas disease. Western blot results using sera from both acute and chronic chagasic patients presenting with cardiac, indeterminate or digestive disease revealed similar, but not identical, antigenic profiles.</p> <p>Conclusion</p> <p>This is the first study addressing the serological cross-reactivity between distinct forms and strains of <it>T. rangeli </it>and <it>T. cruzi </it>using sera from distinct phases of the Chagasic infection. Several <it>T. rangeli</it>-specific proteins were detected, which may have potential as diagnostic tools.</p

Enxertia meristemática da seringueira I: viabilidade potencial e resultados obtidos em ensaios exploratórios.

Ensaios exploratórios conduzidos no CNPSe (1976-77), usando extremidades apicais dos clones IAN 717, IAN 873 e Fx 3899, medindo 3-4 cm de comprimento, seccionadas em bisel duplo e enxertadas em sementes em fase de germinação (dois a cinco dias germinadas), em secção vertical no eixo entre os dois pecíolos cotiledonários..