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A Monte Carlo Study of the Electron Clouds Produced by Polarized X-Rays in Xenon
G.S. Botte; P.J.B.M. Rachinhas; T.H.V.T. Dias; F.P. Santos; L.M.N. Távora; R.M.Curado da Silva; C.A.N. Conde; A. D. StaufferInformation about the polarization of x-ray photons can be determined by probing the direction of emission of photoelectrons and the profile of the electron cloud produced in the detecting medium. In this work we present Monte Carlo results for the electron clouds produced in xenon by the absorption of x-rays, considering a simplenon-relativistic dipole approach to the angular differential photoionization cross...
Breast skin-line detection using dynamic programming
Silva, C. A.; Lima, C. S.; Correia, J. H.In this paper, we present a novel method to extract the breast skin-line based on dynamic programming. Skin-line extraction is an important preprocessing step in CAD systems; however, it is a challenging problem due to the presence of noise, underexposed regions, which results in a low contrast area near the skin-air interface, and artifacts such as labels. Our proposal utilizes the stroma edge to constrain sea...
Influence of climatic conditions on in vitro production of bovine embryos
Pessoa,G.A; Navarro,R.B; Rauber,L.P; Brass,K.E; Silva,C.A.M; Rubin,M.I.BTemperature and rainfall were analyzed daily during six years to evaluate their influence on in vitro production of bovine embryos. Weekly replications (n=480) were performed on 14,778 ovaries collected at slaughterhouses. Cumulus oocyte complexes (n=19,180) were fertilized with a pool of Bos taurus taurus semen in one incubator with 5% CO2. Presumable zygotes were cultured in gasified plastic bags with 5% CO2,...
ENCONTRO DE PRODUÇÃO CIENTÍFICA DA EMBRAPA ALGODÃO - EPC 2010, 5., 2010. Campin...
BELTRAO, N. E. de M.; SILVA, C. A. D. da; SANTOS, J. W. dos; LIMA, M. M. de A.; SILVA, I. C. da2010
Lack of tolerance for the anti-dyskinetic effects of 7-nitroindazole, a neurona...
Novaretti,N.; Padovan-Neto,F.E.; Tumas,V.; da-Silva,C.A.; Del Bel,E.A.7-Nitroindazole (7-NI) inhibits neuronal nitric oxide synthase in vivo and reduces l-DOPA-induced dyskinesias in a rat model of parkinsonism. The aim of the present study was to determine if the anti-dyskinetic effect of 7-NI was subject to tolerance after repeated treatment and if this drug could interfere with the priming effect of l-DOPA. Adult male Wistar rats (200-250 g) with unilateral depletion of dopami...
The use and relevance of gonad protection shields in children during hips radio...
Silva, C. A.; Silva, P. N.; Ventura, Sandra Moreira RuaConsidering that ionizing radiation effects are cumulative and the gonads are particularly sensitive to these effects, and also the clinical importance of pelvic radiographs in children, the excess of radiation exposure to the gonads must be avoided. The purpose of this study is to demonstrate the relevance of the correct use of gonad protection shields and to evaluate their use on the hip radiographs performed...
Algodoeiro herbáceo em sistema de cultivo adensado: atualidades e perspectivas.
SILVA, C. A. D. da; BELTRAO, N. E. de M.; FERREIRA, A. C. de B.; SILVA, O. R. R. F.; SUASSUNA, N. D.2009
Algodão agroecológico: opção de agronegócio para o semiárido do Brasil.
BELTRAO, N. E. de M.; SILVA, C. A. D. da; BASTOS, C. S.; SUINAGA, F. A.; ARRIEL, N. H. C.; RAMALHO, F. de S.2009
Elementos-traço e sua relação com qualidade e inocuidade de fertilizantes, corr...
MARCHI, G.; GUILHERME, L. R. G.; SILVA, C. A.; GONÇALVES, V. C.2009
Prospecção fitoquímica de Sonchus oleraceus e sua toxicidade sobre o microcrust...
Lima,J.M.; Silva,C.A.; Rosa,M.B.; Santos,J.B.; Oliveira,T.G.; Silva,M.B.A espécie vegetal Sonchus oleraceus é uma planta daninha presente em diversas culturas no Brasil e de utilização na medicina popular. Neste trabalho, realizou-se a prospecção fitoquímica dessa espécie com extratos em etanol, água e diclorometano, bem como testes de toxicidade sobre o microcrustáceo Artemia salina. O extrato aquoso apresentou em sua composição açúcares redutores, compostos fenólicos, taninos, fl...
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