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A novel modified acrylic bone cement matrix. A step forward on antibiotic deliv...

Matos, A. C.; Gonçalves, L. M.; Rijo, P.; Vaz, M. A.; Almeida, A. A.; Bettencourt, A. F.

Currently the safe and responsible use of antibiotics is a world-wide concern as it promotes prevention of the increasing emergence of multiresistant bacterial strains. Considering that there is a noticeable decline of the available antibiotic pipeline able to combat emerging resistance in serious infection a major concern grows around the prosthetic joint infections once the available commercial antibiotic loa...


Deposition of conductive materials on textile and polymeric flexible substrates

Silva, Nuno Lacerda; Gonçalves, L. M.; Carvalho, Helder

This paper describes the study, analysis and selection of textile and similar materials to be used as flexible substrates for thin conductive film deposition, in the context of integrating electronics into textiles. Kapton® polyimide was chosen as reference substrate material, was characterized regarding mechanical and electrical properties and was used as a basis for a comparison with several textile substrate...


Influence of heat pipe operating temperature on exhaust heat thermoelectric gen...

Brito, F. P.; Martins, Jorge; Gonçalves, L. M.; Antunes, Nuno; Sousa, Diogo

Increasingly stringent targets on energy efficiency and emissions, as well as growing vehicle electrification are making attractive the electric recovery of the energy normally wasted through the tailpipe of Internal Combustion Engines. Recent developments in thermoelectrics (TE) may soon make them a viable solution for such applications. This team has been exploring the potential of using TE modules in combin...


Bi2Te3-Sb2Te3 on polymeric substrate for X-ray detectors based on the seebeck e...

Rocha, J. G.; Gonçalves, L. M.; Lanceros-Méndez, S.

A theoretical and experimental basis for a x-ray detector concept, based on the conversion of x-rays into thermal energy is presented. The detector follows an indirect approach: the x-rays are first converted into thermal energy, which is then converted into electrical signals by the Seebeck effect. The detector does not need high operating voltages as the detectors based on photoconductors, it shows higher eff...


The deposition of Bi2Te3 and Sb2Te3 thermoelectric thin-films by thermal co-eva...

Gonçalves, L. M.

Bismuth, antimony and tellurium compounds (Bi/Sb/Te) are known as the best thermoelectric materials for room temperature operation. Despite thermoelectric devices with these materials being used for many years in macro-scale dimensions (millimetres sized devices), only few attempts were done to reduce these devices to the micro-scale (micrometers sized devices). The deposition of thermoelectric films was report...


Thermoelectric exhaust energy recovery with temperature control through heat pipes

Martins, Jorge; Brito, F. P.; Gonçalves, L. M.; Antunes, Joaquim

Currently, a great deal of the automotive industry’s R&D effort is focused on improving overall vehicle environmental and energy efficiency. For instance, one of the things that Electric Vehicles (EVs) and Hybrid cars (HEV) have in common is the recovery of waste energy, namely during braking. But, when an I.C. engine is operating (e. g. as a range extender in an EV), a large amount of energy is also wasted wit...


Modelling of thermoelectric generator with heat pipe assist for range extender ...

Brito, F. P.; Martins, Jorge; Gonçalves, L. M.; Sousa, R.

Recent trends towards electrification of vehicles favour the adoption of waste energy recovery into electricity. Battery-only Electric Vehicles (BEV) need a very large energy storage system so the use of a Range Extender (RE) may allow a significant downsizing of these bulky components. The Internal Combustion Engines (ICE) have two major discarded energy fluxes, engine cooling and exhaust gas. In Extended Rang...


Avaliação de ferramentas na furação de laminados compósitos

D. J. S. Goncalves; L. M. P. Durão; V.H.C. de Albuquerque; J.M.R.S. Tavares; A. M. Baptista

The development of cutting tools becomes a challenge to the industry of composite materials to obtain high quality holes, minimizing damage. This work aims to examine the influence of various parameters such as feed rate and tool geometry on thrust forces developed during drilling operations and on the extent of damage. In this work, a comparative study of tool geometry with the aim of reducing the associated d...


Characterization of the interdependency between residues that bind the substrat...

Tomassi,M.H.; Rozenfeld,J.H.K.; Gonçalves,L.M.; Marana,S.R.

The manner by which effects of simultaneous mutations combine to change enzymatic activity is not easily predictable because these effects are not always additive in a linear manner. Hence, the characterization of the effects of simultaneous mutations of amino acid residues that bind the substrate can make a significant contribution to the understanding of the substrate specificity of enzymes. In the β-gly...

Data: 2010   |   Origem: OASIS br

Heat-pipe assisted thermoelectric generators for exhaust gas applications

Gonçalves, L. M.; Martins, Jorge; Antunes, Joaquim; Rocha, Romeu; Brito, F. P.

Millions of hybrid cars are already running on our roads with the purpose of reducing fossil fuel dependence. One of their main advantages is the recovery of wasted energy, namely by brake recovery. However, there are other sources of wasted energy in a car powered by an internal combustion engine, such as the heat lost through the cooling system, lubrication system (oil coolers) and in the exhaust system. Thes...


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    Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia