Encontrados 15 documentos, a visualizar página 1 de 2
Pancitopénia e hiperpigmentação cutânea: uma associação inesperada
Louro, C; Pegado, A; Ferreira, B; Camacho, T; Silva, A; Lino, J; Soares, Z; Tonel, CA anemia carêncial é uma uma patologia pouco prevalente na sociedade actual, acometendo uma população com características muito específicas. O défice de ácido fólico pode cursar com a rara apresentação de hiperpigmentação, por mecanismos que ainda não estão completamente esclarecidos. Os autores descrevem o caso clínico de um doente com 81 anos de idade, sexo masculino, caucasiano, com antecedentes pessoais de ...
AVC isquémico em doente jovem - caso clínico
Louro, C; Ferreira, B; Camacho, T; Silva, A; Lino, J; Soares, Z; Tonel, CA população jovem adulta é afectada numa minoria por acidentes vasculares cerebrais isquémicos (ACVi), mas em cerca de 40% dos casos, estes são criptogénicos. Nestes doentes é raramente possível documentar a existência de uma comunicação inter-auricular (CIA) do tipo ostium secundum. Esta patologia invulgar está associada a um aumento do rico de AVCi por embolia paradoxal. Os autores apresentam o caso de um doe...
Caso clinico: Apresentação rara e de difícil diagnóstico de um Linfoma Plasmoci...
Louro, C; Tourais Martins, R; Velez, MOs linfomas de baixo grau plasmocitóides caracterizam-se por adenopatias periféricas, comprometimento do baço e invasão medular nos diversos estádios da doença. Os autores apresentam o caso clinico de um doente com 63 anos de idade, antecedentes pessoais de vitiligo, admitido por anorexia, astenia e perda ponderal de 30Kgs, associado a bicitopénia grave (Hb 6.4mg/dL, normocítica, normocrómica, e leucopenia de ...
Effects of alkaline and acid solutions on glass/epoxy composites
Amaro, A. M.; Reis, P. N. B.; Neto, M. A.; Louro, C.Composite structures can be exposed to a range of corrosive environments during their in-service life, which causes degradation in terms of material properties. The effect of alkaline and acid solutions on the GRP mechanical properties can be found in open literature, but the studies presented are not sufficient to establish a full knowledge of this subject. In this paper the flexural properties and the impact ...
Thermal stability in oxidative and protective environments of a-C:H cap layer o...
Louro, C.; Moura, C. Wagner; Carvalho, N.; Stueber, M.; Cavaleiro, A.Three types of hydrogenated amorphous carbon (a-C:H) coatings were synthesized on stainless steel substrates by a Plasma Assisted CVD process, containing hydrogen contents in the range from 25 to 29 at.%. The effect of annealing up to 600 °C in two different environments on both the structure and the mechanical properties of the coatings were investigated by means of Differential Scanning Calorimetry/Thermograv...
Effects of O addition on the thermal behaviour of hard W-N sputtered coatings
Louro, C.; Oliveira, J. C.; Cavaleiro, A.The structural thermal behaviour of three W-O-N sputtered coatings with similar metalloid to metal ratio (~2.1) was investigated up to 900 °C after annealing in a vacuum tube furnace as well as in-situ HT-XRD under a controlled atmosphere of Ar-5%H2. The as-deposited microstructure of the coatings consisting in a nanocomposite of low-order W-O and W-N phases evaluated differently as a function of the oxygen con...
Development of new decorative coatings based on gold nanoparticles dispersed in...
Torrell, M.; Machado, P.; Cunha, L.; Figueiredo, N. M.; Oliveira, J. C.; Louro, C.; Vaz, F.The present work is devoted to the optical properties of Au:TiO2 thin films in order to clarify the role of the Au clusters inclusions in the TiO2 dielectric matrix. Three series of films containing about 30 at.% (29.2), 20 at. % (19.8) and 10 at.% (9.3) Au were deposited by dc reactive magnetron sputtering. On thermal annealing in the range from 300 to 800 °C in protective atmosphere, significant changes on th...
In situ structural evolution of arc-deposited Cr-based coatings
Neves, A. M.; Severo, V.; Cvrcek, L.; Polcar, T.; Louro, C.; Cavaleiro, A.Cr-based coatings were prepared by cathode arc-evaporation technology using N2 and C2H2 as reactive gases. Three compositions were investigated, Cr60N40, Cr41N27C32 and Cr67C33. ; http://www.sciencedirect.com/science/article/B6TVV-4SS1H9J-8/1/d2e621d9de5bfac3c95a1de278808f4d
W-B-N sputter-deposited thin films for mechanical application
Louro, C.; Lamni, R.; Lévy, F.The structure, composition and hardness of reactively sputtered W-B-N thin films were investigated by XRD, EPMA, and Vickers ultramicroindentation. ; http://www.sciencedirect.com/science/article/B6TVV-4FWNJ1D-3/1/37496577b651c432263f65f0131c7a0c
Nanocrystalline structure and hardness of thin films
Cavaleiro, A.; Louro, C.W---Si---N films were deposited by reactive sputtering in a N2+Ar atmosphere from a W target incrusted with different number of Si pieces. The coatings present different crystallographic structures from the crystalline [alpha]-W and W2N to amorphous phase. Crystalline films have very low grain sizes from 15 down to 3 nm. ; http://www.sciencedirect.com/science/article/B6TW4-44PCFMC-6/1/9eb4f2ae932f9fa1dde3d75...
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