O presente trabalho tem como objectivo avaliar o estado de nutrição, a composição corporal e a função respiratória de um grupo de crianças com fibrose quística sem evidência clínica ou laboratorial de infecção recente, assim como o de conhecer os seus hábitos alimentares e determinar o valor do dispêndio energético de repouso medido por calorimetria indirecta e o avaliado pelas equações de Schofield, da Organiz...
A commercial photopolymerizable resinmodified glass-ionomer (Fuji II LC) was studied using a variety of nuclear magnetic resonance (NMR) techniques. H and F stray-field imaging (STRAFI) enabled to follow the acid–base reaction kinetics in self-cured (SC) samples. Gelation and maturation processes with 25 min and 40 h average time constants, respectively, were distinguished. In self- & photo-cured (SPC) samples,...
A set of Na-Sr-phosphate glass and glass-ceramic samples, with general formula xSrO:(0.55-x)Na2O:0.45P2O5, were prepared and analysed by solid state 31P nuclear magnetic resonance spectroscopy and X-ray powder diffraction. The results show the presence of Q1 and Q2 phosphate species in all samples. At low concentrations of Sr2+ (x £ 0.20) the strontium is preferentially incorporated in Sr2+-Q1 crystalline phase...
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