Papers by Fernando Zanini
Journal of Fluorescence, 2010
The progression to end-stage renal failure is independent of the initial pathogenic mechanism. Me... more The progression to end-stage renal failure is independent of the initial pathogenic mechanism. Metabolic acidosis is a common consequence of chronic renal failure that results from inadequate ammonium excretion and decreased tubular bicarbonate reabsorption. Protoporphyrin IX (PpIX) is the immediate metabolic precursor of the heme molecule. The purpose of this study was to evaluate the levels of erythrocytes protoporphyrin IX at an animal model during progressive renal disease. A total of 36 eight-week-old male Wistar rats were divided into six groups: Normal, 4 and 8 weeks after 5/6 nephrectomy (NX). Renal function was evaluated by creatinine clearance and plasma creatinine levels. The autofluorescence of erythrocytes porphyrin of healthy and NX rats was analyzed using fluorescence spectroscopy. Emission spectra were obtained by exciting the samples at 405 nm. Significant differences between normal and NX rats autofluorescence shape occurred in the 600–700 nm spectral region. A correlation was observed between emission band intensity at 635 nm and progression of renal disease.
Characterisation of phase evolution under load by means of phase contrast imaging using synchrotron radiation
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2004
ABSTRACT Phase contrast radiography (PCR) is a quite novel technique that is collecting increasin... more ABSTRACT Phase contrast radiography (PCR) is a quite novel technique that is collecting increasing attention due to the possibility to obtain image information in presence of very small differences in the densities of the materials under analysis. Phase contrast imaging (PCI) has some specific advantage when compared with common microscopic techniques: (a) no special preparation of the sample is needed (b) the simultaneously investigated area is very large and (c) it allows the setting up of complex experimental apparatus. The results here presented are a good evidence of these three advantages.In this paper, we report on the application of phase contrast imaging in the study of the phase evolution during pseudoelastic transformation in the NiTiCu shape memory alloys (SMAs). The investigation was undertaken with the aim to identify some modification of the structure taking place at the end of the transformation plateau in the pseudoelastic behaviour of the alloy.
Phase-sensitive X-ray imaging at the SYRMEP beamline of Elettra
Acta Crystallographica Section A, 2002
Os Ativos agora passam a ser classificados em Ativos Circulantes e Ativos não Circulantes. Os Ati... more Os Ativos agora passam a ser classificados em Ativos Circulantes e Ativos não Circulantes. Os Ativos não Circulantes passam a possuir os seguintes grupos: Realizável a longo prazo, Investimentos, Imobilizado e Intangível. (O Diferido deverá ser eliminado pela Medida Provisória a ser emitida brevemente, passando os itens que o compõem a ser baixados para o resultado ou reclassificados para o intangível).
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Papers by Fernando Zanini