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Assessment of left ventricular diastolic function with cardiovascular MRI: what...
Duarte, R.; Fernadez-Perez, G.; Bettencourt, N.; Sampaio, F.; Miranda, D.; França, M.; Portugal, P.Abstract Diastolic dysfunction is a common entity and the predominant cause of heart failure in 40%-50% of patients. Diagnosis of diastolic dysfunction is clinically relevant and is associated with a poor prognosis. The aim of this essay was to review the pathophysiology and different grades of diastolic dysfunction and to provide an overview on the role of cardiovascular magnetic resonance imaging in the asses...
Characterization of potassium glycinate for carbon dioxide absorption purposes
A. F. Portugal; P. W. J. Derks; G. F. Versteeg; F. D. Magalhães; A. MendesAqueous solutions of potassium glycinate were characterized for carbon dioxide absorption purposes. Density and viscosity of these solutions, with concentrations ranging from 0.1 to 3M, were determined at temperatures from 293 to 313 K. Diffusivity of CO2 in solution was estimated applying the modified Stokes–Einstein relation. Solubilities of N2O at the same temperatures and concentrations were measured ...
Medida precisa de parametros da rede cristalina por difração multipla de raios-X
Remberto Portugal PA sensibilidade S da medida de parâmetros de rede por meio da Difração múltipla ( D.M. ) de raios-X ( S. Caticha Ellis, Japan J. Appl. Phys. (1975), 14, 603-611 ) é dada por: S = 1/( gtanf cos2q1 ), onde g = /a, q1 o ângulo de Bragg para a reflexão primária, e f o ângulo formado pelo vetor reciproco H da reflexão secundária; com o plano de incidência quando H está em posição de reflexão: Pares de Reflexões múlt...
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