Buscadores visuales: Una herramienta práctica y visual para la recuperación de información (2007)
[Spanish abstract] El presente artículo, trata de promocionar los buscadores visuales como herramientas gestoras de conocimiento a través de la recuperación de la información, utilizando unas...
Buscadores visuales: Una herramienta práctica y visual para la recuperación de información (2007)
This article seeks to promote the visual search engines as tools for managing knowledge through information retrieval, using some interfaces that a allow users to meet their information needs through...
Roque, António José, Correia, A. Gomes, Fortunato, Eduardo, Pardo De Santayana, Fernando, Castro, F., Ferreira, Sandra Reis, ...
A estratégia de gestão para os resíduos em que ainda não é praticável a prevenção da sua produção, deve privilegiar a recuperação destes, nomeadamente através de soluções de...
Solvent extraction aplied to the recovery of heavy metals from galvanic sludges (2005)
Silva, João Eudes Da, Paiva, A. P., Soares, Delfim, Labrincha, J. A., Castro, F.
In this study, a hydrometallurgical treatment involving the solvent extraction and recovery of some heavy metals from a sulphuric acid leach solution of galvanic sludge, using...
Physical and chemical characterisation of metal finishing industrial wastes (2005)
Magalhães, Jorge M., Silva, João Eudes Da, Castro, F., Labrincha, J. A.
In EU countries approximately 150,000 ons/year of galvanic sludges are generated by 4000 industrial units from the orresponding wastewater treatment plants. These sludges are generally classified as...
Leaching behaviour of a galvanic sludge in sulphuric acid and ammoniacal media (2005)
Silva, João Eudes Da, Soares, Delfim, Paiva, A. P., Labrincha, J. A., Castro, F.
Leaching studies of a sludge produced by the physico-chemical treatment of astewaters generated by a Ni/Cr plating plant were carried out in both sulphuric acid and ammoniacal media aiming to decide...
Argamassas de cimento portland com incorporação de aluminífero (2005)
Pereira, D. A., Castro, F., Almeida, M. F., Labrincha, J. A.
O objectivo principal deste trabalho prende-se com o estudo da possibilidade de reutilizar «óxido secundário» resultante do tratamento de reciclagem de escória salina, como matéria-prima a...
Gestão de resíduos industriais por incorporação em materiais para construção civil (2004)
Castro, F., Vilarinho, Cândida, Soares, Delfim
Nesta apresentação abordar-se-á a problemática da gestão de resíduos industriais da indústria metalúrgica e de processamento de materiais, por via da sua inertização durante o processo de...
Study of the interface reactions between two lead-free solders and copper substrates (2004)
Soares, Delfim, Vilarinho, Cândida, Barbosa, J., Silva, Rosa, Castro, F.
Traditional Sn-Pb solder alloys are being replaced, because of environmental and health concerns about lead toxicity. Among some alternative alloy systems, the Sn-Zn and Sn- Cu base alloy systems...
Magalhães, Jorge M., Silva, João Eudes Da, Castro, F., Labrincha, J. A.
The incorporation of several industrial wastes in ceramic matrixes had been attempted as an effective low expense technique for the fixation of metallic species in usable products or simply to reduce...
Magalhães, Jorge M., Silva, João Eudes Da, Castro, F., Labrincha, J. A.
Hydroxide-metal sludges from electroplating industry are a potential source of environmental contamination due to their high content of heavy metals. The incorporation of these residues in a ceramic...
Contribution to the knowledge of the Cu–Sn–Zn system for compositions close to brass alloys (2004)
Vilarinho, Cândida, Soares, Delfim, Castro, F.
The effect of tin content in the equilibrium phases of the Cu–Zn-based alloys, within the range of chemical compositions with interest to brass producers is described. For this purpose, ternary...
Leaching of brasses in long-term direct contact with water (2004)
Vilarinho, Cândida, Soares, Delfim, Barbosa, J., Castro, F.
Copper-zinc alloys (alfa-beta brasses) are currently used to produce house water piping and further parts, that might be in direct contact with drinking water. Lead is added to these alloys in order...
Inertização de resíduos industriais de alumínio em materiais cerâmicos refractários (2004)
Pereira, D. A., Labrincha, J. A., Couto, D. M., Castro, F., Almeida, M. F.
Estudou-se a incorporação de escórias salinas de alumínio e lamas galvânicas de anodização de alumínio, como matéria prima para a fabricação de materiais refractários.
Phase equilibria of the Al-Cu-Zn system for compositions close to brass alloys (2003)
Vilarinho, Cândida, Soares, Delfim, Castro, F.
The effect of aluminium in the equilibrium phases of the Cu-Zn alloys, within the range ofchemical compositions of interest to brass producers, has been studied. Ternary alloys werecasted by melting...
Silva, João Eudes Da, Castro, F.
Cases of contamination by metals in the water wells of the Cavado Valley in north-west Portugal can be attributed to the heavy leaching of clay soils due to an excess of nitrogen resulting from the...
Soares, Delfim, Vilarinho, Cândida, Silva, Rosa, Vasques, Ana, Castro, F.
The effect of iron addition to Cu-Al-Ni alloys (in the zone of the chemical composition of commercial aluminium bronze) has been studied. The quaternary alloys were melted from a base Cu-Al-Ni alloy...
Vilarinho, Cândida, Castro, F., Soares, Delfim
Although brasses are resistant to several forms of corrosion, they are susceptible to dezincification – selective dissolution of zinc – which may be responsible for failures in service of casting...
Caracterização química e micro-estrutural de faianças portuguesas (2001)
Informações em: http://www.ipmuseus.pt/pt/lojas/P24629/TA.aspx
Pereira, D. A., Castro, F., Almeida, M. F., Labrincha, J. A.
Recovery of a salt cake slag produced from aluminum scrap re-melted in rotary furnaces, at the lowest cost, while complying with all environmental laws is the main objective of this study. The...
Pereira, D. A., Castro, F., Almeida, M. F., Labrincha, J. A.
Recovery of a salt cake slag produced from aluminum scrap re-melted in rotary furnaces, at the lowest cost, while complying with all environmental laws is the main objective of this study. The...
Castro, F., Campos Reyes, M., Dorta, María C., Rodríguez, F.
En este estudio se presenta la opinión de los profesionales de la red de asistencia a las drogodependencias en relación con la prevención, a través de un cuestionario elaborado para tal fin, el...
The chemical compositions of several archaeological, ethnographic and clay samples have been determined. That allowed, by means of an appropriate statistical procedure, to estimate the probability...
Delalio, A., Bajger, Z., Balaz, P., Castro, F.
Steelmaking dusts are frequently classified as hazardous residues, due to their eco-toxicity characteristics. This derives mainly from the presence of heavy metals like zinc, lead and cadmium in...
Neste artigo descreve-se a metodologia analítica e estatística para determinação da origem de fragmentos cerâmicos arqueológicos, com base na caracterização química dos mesmos,...
No âmbito do Projecto PROCEN – A produção cerâmica do Norte (Sécs. XII-XX) - Estudo histórico, tipológico e laboratorial, do Instituto de Ciências Sociais da Universidade do Minho e...
Densification of Silicon Nitride Ceramics Under Sinter-HIP Conditions. (1998)
Iturriza, I., Echeberria, J., Gutierrez, I., Castro, F.
The influence of several sinter-HIP variables on the densification behavior of silicon nitride-based ceramics has been investigated. The processing conditions were studied for Si3N4 powder mixtures...
Sinter and Sinter-HIP of Silicon Nitride Ceramics with Yttria and Alumina Additions. (1998)
Iturriza, I., Castro, F., Fuentes, M.
The sintering behavior of silicon nitride ceramics has been investigated by preparing powder mixtures containing controlled amounts of yttria and alumina. The fired density of the compacts, having a...
Castro, F., Echeberria, J., Fuentes, M.
It is now generally accepted that the oxidation resistance and high-temperature mechanical strength of silicon nitride-based ceramics, densified with the aid of a liquid formed at the sintering...
An Oxidation Resistant Al2O3-TiO2 Sintered Silicon Nitride. (1998)
Ovreboe, D. N., Biswas, S. K., Castro, F., Riley, F. L.
Silicon nitride has been hot-pressed and pressureless sintered using densification aids based on the Al2O3-SiO2-TiO2 system. Hot-pressing can be achieved satisfactorily at 1700 C with an Al2O3-TiO2...
Grain Growth in Liquid-Phase-Sintered Alumina. (1998)
Echeberria, J., Castro, F., Riley, F. L.
Alumina based ceramics containing controlled additions of CaO and/or MgO within the system Al2O3-CaO-SiO2-MgO have been liquid phase sintered by hot pressing at temperatures between 1350 and 1400 C....
Moeling of chemical wear in ferrous alloys/silicon nitride contacts during high speed cutting (1998)
Silva, R. F., Oliveira, Filipe José, Castro, F., Vieira, J. M.
The wear resistance of SisN4 in machining of iron alloys can be surprisingly low due to chemical affinity for dissolution in the metal. This limits the use of SisN4 inserts in high speed machining of...
Charecterization and pre-treatment of steelmaking dusts in order to recover valuable products (1998)
Delalio, A., Bajger, Z., Balaz, P., Castro, F., Magalhães, J., Curilla, J.
Steelmaking dusts are frequently classified as hazardous residues, due to their eco-toxicity characteristics. This derives mainly from the presence of heavy metals like zinc, lead and cadmium in...
Purification of sulphuric acid solutions from the leaching of nickelliferous of laterites (1998)
Low-grade nickelliferous laterites are important sources of nickel and cobalt, since 80% of the world’s known reserves of nickel are associated with such types of deposits. Nickel can be produced...
Effect of the Bi content on the mechanical properties of a Sn-Zn-Al-Bi solder alloy (1998)
Soares, Delfim, Vilarinho, Cândida, Barbosa, J., Silva, Rosa, Pinho, Marques, Castro, F.
Because of environmental and health concerns, some alternative solder alloys, named lead-free ones, are being developed. Among them, the Sn-Zn-Al system has been studied and reveals promising...
Primera cita de Aceria drabae (Nalepa) (Acarina:Eriophyidae) en España (1998)
Viñuela Sandoval, Elisa, Estal, P. Del, Castro, F., Murillo, J., Lipa, J.J., Caballero, Primitivo, ...
Quality assurance in anatomic pathology: automated SNOMED coding.
Carter, K J, Rinehart, S, Kessler, E, Caccamo, L P, Ritchey, N P, Erickson, B A, ...
This case study details the set-up and implementation of the PathNet autocoder (Cerner Corporation) in a busy anatomic pathology laboratory. After initial start-up, procedures were developed to...
Role of Ca2+ in pyruvate dehydrogenase interconversion in brain mitochondria and synaptosomes.
The steady-state content of active (dephospho) pyruvate dehydrogenase (PDHA) of suspensions of coupled rat brain mitochondria oxidizing succinate was found to be markedly increased with increasing...
1. The reduction of mitochondrial NAD(P) by 2-oxoglutarate was monitored as a measure of 2-oxoglutarate dehydrogenase activity in its intramitochondrial locale. In the absence of ADP, steady-state...
Quality assurance in anatomic pathology: automated SNOMED coding.
Carter, K J, Rinehart, S, Kessler, E, Caccamo, L P, Ritchey, N P, Erickson, B A, ...
This case study details the set-up and implementation of the PathNet autocoder (Cerner Corporation) in a busy anatomic pathology laboratory. After initial start-up, procedures were developed to...
Role of Ca2+ in pyruvate dehydrogenase interconversion in brain mitochondria and synaptosomes.
The steady-state content of active (dephospho) pyruvate dehydrogenase (PDHA) of suspensions of coupled rat brain mitochondria oxidizing succinate was found to be markedly increased with increasing...
1. The reduction of mitochondrial NAD(P) by 2-oxoglutarate was monitored as a measure of 2-oxoglutarate dehydrogenase activity in its intramitochondrial locale. In the absence of ADP, steady-state...
Castro, F, Acevedo, E, Ciusani, E, Angulo, J, Wollheim, F, Sandberg-Wollheim, M
OBJECTIVE—To study the association between rheumatoid arthritis (RA) and HLA and tumour necrosis factor (TNF) polymorphism in Peruvian mestizo patients in comparison with ethnically similar...