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Deterioration of the granitic stone at Misericórdia chapel in Murça (northern P...

In this work are considered the main deterioration processes of the granitic stone at the Misericórdia chapel of Murça (Vila Real). In the main façade and indoors there are erosive features (that can endanger decorative elements) and salt efflorescences with distributions that suggested the influence of capillary rising solutions, hypothesis supported by studies with ground penetrating radar and thermography. T...

The effect of increasing V content on the structure, mechanical properties and ...

In the last years, vanadium rich films have been introduced as possible candidates for self-lubrication at high temperatures, based on the formation of V2O5 oxide. The aim of this investigation was to study the effect of V additions on the structure, mechanical properties and oxidation resistance of Ti–Si–V–N coatings deposited by DC reactive magnetron sputtering. The results achieved for TiSiVN films were comp...

Role of ogyxen and nitrogen in mechanical alloying mechanism of Ni-Ti powder mi...

In this study, the critical milling behaviour of Ni-Ti powder mixtures was evaluated in relation to the effect of atmospheric gases, more specifically to oxygen and nitrogen. Within the experimental conditions used, it is shown that both gases play an important role in the alloying process and that not only oxygen gas reacts with the mechanically alloyed powders but also nitrogen. The most effective mixing occu...

In situ experiments with synchrotron high-energy x-rays of Ni-Ti alloys produce...

The structural evolution that takes place during the homogenization heat treatments of powder metallurgical Ni-Ti- alloys was studied by in situ synchrotron diffraction. It is proposed to get a deeper understanding of this phenomenon by using different types of thermal/mechanical cycles.

Effect of methylprednisolone on perivascular pulmonary edema, inflammatory infi...

Dilute-phase pneumatic conveying of polystyrene particles: pressure drop curve ...

During the pneumatic conveying of plastic pellets, it has been observed that materials with similar physical characteristics may develop a substantial difference in pressure drop. In this work, the pressure drop in a particle-laden 2.7 meter long horizontal channel with circular cross-section is presented from an experimental perspective. Experiments are carried out for cylindrical polystyrene beads with an ave...

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Production of photocatalytic road pavements using TiO2 nanoparticles

poster ; Man’s activity and mismanagement of resources conducted to dangerous levels of pollution in water, air and earth and to incalculable deficiencies, harmful to the physical and social health of mankind. Industrial activities, heating systems and road traffic are the main responsibles for the emission of pollutant gases such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). As so, its harmf...

Alopécia Areata: Análise Retrospectiva da Consulta de Dermatologia. Pediátrica ...

INTRODUCTION: Alopecia areata usually presents as patchy, nonscarring hair loss. It seems to be an immune mediated disease, whereas genetic predisposition, environmental and psychological triggers may be involved in its aetiology. OBJECTIVES: To study the epidemiology, clinical aspects, associations, and treatment of alopecia areata in the paediatric population of Peadiatric Dermatology outpatients over a 9-ye...

Papel do ecocardiograma transesofágico na avaliação e orientação terapêutica do...

INTRODUCTION: Ischemic stroke is the leading cause of mortality in Portugal, with around 30 to 50 % of cases being of cardioembolic etiology. Transesophageal echocardiography (TEE) has assumed growing importance in the detection of cardiac sources of embolism. However, there is controversy regarding the implications of TEE findings for the therapeutic approach to patients with ischemic stroke. OBJECTIVES: To a...