On the width of the thermally stimulated discharge current peak - Neagu ER; Dias CJ; Lanca MC; Igreja R; Inacio P; Marat-Mendes JN (2010)
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Semiotics-based manufacturing systems integration in the advent of a single electronic market - Jardim-Goncalves R; Grilo A; Hassan T; Steiger-Garcao A (INTERNATIONAL JOURNAL OF COMPUTER INTEGRATED MANUFACTURING, 2010)
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SOA4BIM: Putting the building and construction industry in the Single European Information Space - Jardim-Goncalves R; Grilo A (AUTOMATION IN CONSTRUCTION, 2010)
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The study of the molecular movements in the range of glass transition by the final thermally stimulated discharge current technique - Neagu ER; Dias CJ; Lanca MC; Igreja R; Inacio P; Marat-Mendes JN (2010)
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A theoretical approach to the elastic behaviour of compact and hollow spherical particles reinforced metal-matrix composites - Botas; JD; Velhinho; A; Silva, M. A. G.,; RJC (Int. J. of Mater. Research, 2010)
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Value proposition of interoperability on BIM and collaborative working environments - Grilo A; Jardim-Goncalves R (Automation in Construction, 2010)
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Value proposition on interoperability of BIM and collaborative working environments - Grilo A; Jardim-Goncalves R (AUTOMATION IN CONSTRUCTION, 2010)
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High Temperature Superconducting Fault Current Limiters as Enabling Technology in Electrical Grids with Increased Distributed Generation Penetration - João Pina; Mário Neves; Alfredo Álvarez; Amadeu Rodrigues (Doctoral Conference on Computing, Electrical and Industrial Systems - DoCEIS'10, 2010)
Amongst applications of high temperature superconductors, fault current limiters are foreseen as one of the most promising in power systems. Several topologies have been developed in the last years, taking advantage of different superconductors? properties. Increasing distributed generation (DG) penetration, based on renewable energy, adds new short-circuit sources to electrical grids, which brings several energy quality and protection issues. Superconducting fault current limiters can obviate these problems, representing thus an enabling technology for DG penetration. In this paper current limiter topologies are presented, its operations principles, strengths and weaknesses, in the context of these DG grids. In the end, future trends are discussed.
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{ Floating gate memory paper transistor } - Martins, R.; Pereira, L.; Barquinha, P.; Correia, N.; Gonçalves, G.; Ferreira, I.; Dias, C.; Fortunato, E. (2010)
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Research and Development of Alternative Concepts in HTS Machines - João Pina; David Inácio; Gonçalo Luis; José M. Ceballos; Pedro Pereira; Martins, João; Ventim-Neves, M.; Alfredo Alvarez; A. Leão Rodrigues (IEEE Transactions on Applied Superconductivity, 2010)
High temperature superconducting (HTS) machines are recognized to offer several advantageous features when comparing to conventional ones. Amongst these, highlights the decrease in weight and volume of the machines, due to increased current density in conductors or the absence of iron slots' teeth; or the decrease in AC losses and consequent higher efficiency of the machines, even accounting for cryogenics. These concepts have been already demonstrated and some machines have even achieved commercial stage. In this paper, several alternative approaches are applied to electrical motors employing HTS materials. The first one is an all superconducting linear motor, where copper conductors and permanent magnets are replaced by Bi-2223 windings and trapped flux magnets, taking advantage of stable levitation due to flux pinning, higher current densities and higher excitation field. The second is an induction disk motor with Bi-2223 armature, where iron, ironless and hybrid approaches are compared. Finally, an innovative command strategy, consisting of an electronically variable pole pairs' number approach, is applied to a superconducting hysteresis disk motor. All these concepts are being investigated and simulation and experimental results are presented.
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Ultrasensitive microchip sensor based on boron-containing polyfluorene nanofilms - Ribeiro, Celso; Brogueira, Pedro; Lavareda, Guilherme; Carvalho, Carlos N.; Amaral, Ana; Santos, Luis; Morgado, Jorge; Scherf, Ulrich; Bonifacio, Vasco D. B. (BIOSENSORS & BIOELECTRONICS, 2010)
A fluorene-based pi-conjugated copolymer with on-chain dibenzoborole units was used in the development of a nanocoated gold interdigitated microelectrode array device which successfully detects fluoride in a broad range of concentrations (10(-11)-10(-4) M) in aqueous solution, upon impedance spectroscopy measurements. A calibration curve obtained over this range of concentrations and a new analytical method based on impedance spectroscopy measurements in aqueous solution is proposed. The sensor nanofilm was produced by spin-coating and diagnosed via spectroscopic ellipsometry, AFM, and electrically conductivity techniques. Changes in the conductivity due to the boron-fluoride complex formation seem to be the major mechanism behind the dependence of impedimetric results on the fluoride concentration. (C) 2010 Elsevier B.V. All rights reserved.
World Congress on Biosensors, Glasgow, SCOTLAND, MAY 26-28, 2010

Ultrasensitive microchip sensor based on boron-containing polyfluorene nanofilms - Ribeiro, Celso; Brogueira, Pedro; Lavareda, Guilherme; de Carvalho, Carlos Nunes; Amaral, Ana; Santos, Luis; Morgado, Jorge; Scherf, Ulrich; Bonifacio, Vasco D. B. (BIOSENSORS & BIOELECTRONICS, 2010)
A fluorene-based pi-conjugated copolymer with on-chain dibenzoborole units was used in the development of a nanocoated gold interdigitated microelectrode array device which successfully detects fluoride in a broad range of concentrations (10(-11)-10(-4) M) in aqueous solution, upon impedance spectroscopy measurements. A calibration curve obtained over this range of concentrations and a new analytical method based on impedance spectroscopy measurements in aqueous solution is proposed. The sensor nanofilm was produced by spin-coating and diagnosed via spectroscopic ellipsometry, AFM, and electrically conductivity techniques. Changes in the conductivity due to the boron-fluoride complex formation seem to be the major mechanism behind the dependence of impedimetric results on the fluoride concentration. (C) 2010 Elsevier B.V. All rights reserved.
World Congress on Biosensors, Glasgow, SCOTLAND, MAY 26-28, 2010

ELECTRONIC PROCUREMENT IN AEC BASED ON BIM - Grilo A; Jardim-Goncalves R (PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON SUSTAINABLE URBANIZATION (ICSU 2010), 2010)
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Quantification of organic acids in beer by nuclear magnetic resonance (NMR)-based methods - Rodrigues, J. E. A.; Erny, G. L.; Barros, A. S.; Esteves, V. I.; Brandao, T.; Ferreira, A. A.; E. Cabrita; Gil, A. M. (Analytica Chimica Acta, 2010)
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Corrigendum to "Preparation and characterization of a cellulose affinity membrane for human immunoglobulin G (IgG) purification" [J. Membr. Sci. 348 (2010) 224-230] (DOI:10.1016/j.memsci.2009.11.004) - T. Barroso; Temtem, M.; Hussain, A.; Aguiar-Ricardo, A.; Roque, A.C.A. (Journal of Membrane Science, 2010)
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Export Date: 19 November 2013Source: Scopus

Development of functional mesoporous microparticles for controlled drug delivery - Restani, R.B.; Correia, VG; Bonifácio, V.D.B.; Aguiar-Ricardo, A. (Journal of Supercritical Fluids, 2010)
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Cited By (since 1996):8Export Date: 19 November 2013Source: Scopus

Preparation and characterization of a cellulose affinity membrane for human immunoglobulin G (IgG) purification - T. Barroso; Temtem, M.; Hussain, A.; Aguiar-Ricardo, A.; Roque, A.C.A. (Journal of Membrane Science, 2010)
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Cited By (since 1996):11Export Date: 19 November 2013Source: Scopus

Comparison of the structure and stability of new α-diimine complexes of copper(I) and silver(I): Density functional theory versus experimental - Rosa, V.; Santos, C. I. M.; Welter, R.; Aullón, G.; Lodeiro, C.; Avilés, T. (Inorganic Chemistry, 2010)
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Cited By :30Export Date: 17 June 2020

Corrosion behaviour of aluminium syntactic functionally graded composites - Ferreira, S. C.; Velhinho, A.; Silva, R.J.C.; Rocha, L. A. (International Journal of Materials & Product Technology, 2010)
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Microstructural Signatures of Bronze Archaeological Artifacts from the Southwestern Iberian Peninsula - Valerio, P.; Silva, R.J.C.; Araujo, M. F.; Soares, A. M. M.; Fernandes, F.M. Braz; Rosa, L. G.; Margarido, F. (Advanced Materials Forum V, Pt 1 and 2, 2010)
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Primary bioreceptivity of limestones used in southern European monuments - Miller, Ana Z.; Leal, Nuno; Laiz, Leonila; Rogerio-Candelera, Miguel A.; Silva, Rui JC; Dionisio, Amelia; Macedo, Maria F.; Saiz-Jimenez, Cesareo; Smith, BJ; GomezHeras, M; Viles, HA; Cassar, J (Limestone in the Built Environment: Present Day Challenges For the Preservation of the Past, 2010)
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On the Definition of Service Abstractions for Parallel Computing - Paulino, Hervé (Parallel Processing and Applied Mathematics, 8th International Conference, PPAM 2009, Wroclaw, Poland, September 13-16, 2009, Revised Selected Papers, Part II, 2010)
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URL={http://asc.di.fct.unl.pt/ herve/papers/Spring-WLPP-PPAM-2009.pdf}

Engineering Concern-Sensitive Navigation Structures, Concepts, Tools and Examples - S. Firmenich,; G. Rossi; M. Urbieta; S. Gordillo; C. Challiol; J. Nanard; M. Nanard; J. Araújo (Journal of WebEngineering, 2010)
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URL={http://www.rintonpress.com/journals/jweonline.html#v9n2}

Adaptive control of distributed collector solar fields - Lemos, J. M.; L. M. Rato; Neves-Silva, R. (Power Plant Application of Advanced Control Techniques, 2010)

Analysis of 65 Pharmaceuticals and Personal Care Products in 5 Wastewater Treatment Plants in Portugal Using a Simplified Analytical Methodology - Salgado R.; Noronha J.P.; Oehmen A.; Carvalho G.; Reis M.A.M. (Water Science & Technology, 2010)

Aspect-Oriented Specification: A Case Study in Space Domain - S. Agostinho,; A. Moreira; Marques, A.; J. Araújo; R. Ferreira,; R. Raminhos; R. Ribeiro; I. Brito; P. Chevalley (International Journal of Software Engineering and Knowledge Engineering, 2010)
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Asphalt Mixtures Compaction study: Field Tests and Numerical Modelling - Rui Micaelo; Jaime Ribeiro; Maria Azevedo; Nuno Azevedo (16th IRF – World road Meeting, 2010)

Biological treatment of propanil and 3,4-dichloroaniline: Kinetic and microbiological characterisation - Carvalho, G.; Marques, R.; A.R. Lopes; C. Faria; Noronha, J. P.; Oehmen, A.; O.C. Nunes; Reis, M. A. M. (Water Research, 2010)

Bond Behaviour of Prestress Steel Strands Bonded with an Epoxy Adhesive and a Cement Grout for Flat Slab Strengthening Purposes – Experimental Study - Faria, Duarte; António Ramos; Válter Lúcio (3rd fib International Congress - 2010, 2010)
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Comparison of fluorescence labelling techniques for the selection of affinity ligands from solid-phase combinatorial libraries - Pina, A.S.; Lowe, C.R.; Roque, A.C.A. (Separation Science and Technology, 2010)

A Contribution for the Automatic Sleep Classification Based on the Itakura-Saito Spectral Distance - Cardoso, E; Batista, AG; Rodrigues, R; Ortigueira, M.D. (1st IFIP Doctoral Conference on Computing, Electrical and Industrial Systems, 2010)

Effect of kefir grains on proteolysis of major milk proteins - Ferreira, I.M.P.L.V.O.; Pinho, O.; Monteiro, D.; Faria, S.; Cruz, S.; Pereira, A.; Roque, A.C.A.; Tavares, P. (Journal of Dairy Science, 2010)

Emerging Trends in Technological Innovation: First IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2010, Costa de Caparica, Portugal, February 22 - Camarinha-Matos, L.M.; P Pereira; Ribeiro, L. (Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2010, 2010)
Camarinha-Matos, Luis M.; Pereira, Pedro; Ribeiro, Luis (Eds.)

Energy Consumption Monitoring System for Large Complexes - Jorge, André; Guerreiro, João; Pedro Pereira; Martins, João; Gomes, Luís (Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2010, 2010)
This paper describes the development of an open source system for monitoring and data acquisition of several energy analyzers. The developed system is based on a computer with Internet/Intranet connection by means of RS485 using Modbus RTU as communication protocol. The monitoring/metering system was developed for large building complexes and was validated in the Faculdade de Ciências e Tecnologia University campus. The system considers two distinct applications. The first one allows the user to verify, in real time, the energy consumption of any department in the complex, produce load diagrams, tables and print, email or save all available data. The second application keeps records of active/reactive energy consumption in order to verify the existence of some anomalous situation, and also monthly charge energy consumption to each corresponding department.
DOI:10.1007/978-3-642-11628-5_46

Estudo Experimental do Punçoamento em Lajes de Betão Reforçado com Fibras de Aço - Paias, Joana; António Ramos (Encontro Nacional Betão Estrutural 2010, 2010)
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Extrapolation Methods for a Nonlinear Weakly Singular Volterra Integral Equation, - Diogo, T.; Lima, P.; M. Rebelo (AIP Conference Proceedings- ICNAAM 2010, Vol. 1281,, 2010)

GADISI – Genetic Algorithms Applied to the Automatic Design of Integrated Spiral Inductors - Pedro Pereira; Fino, M.; Coito, Fernando; Ventim-Neves, Mário (Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2010, 2010)
This work introduces a tool for the optimization of CMOS integrated spiral inductors. The main objective of this tool is to offer designers a first approach for the determination of the inductor layout parameters. The core of the tool is a Genetic Algorithm (GA) optimization procedure where technology constraints on the inductor layout parameters are considered. Further constraints regarding inductor design heuristics are also accounted for. Since the layout parameters are inherently discrete due to technology and topology constraints, discrete variable optimization techniques are used. The Matlab GA toolbox is used and the modifications on the GA functions, yielding technology feasible solutions is presented. For the sake of efficiency and simplicity the pi-model is used for characterizing the inductor. The validity of the design results obtained with the tool, is checked against circuit simulation with ASITIC.
DOI:10.1007/978-3-642-11628-5_57

Gum Arabic coated magnetic nanoparticles with affinity for antibodies - Batalha, I.L.; Hussain, A.; Roque, A.C.A. (Journal of Molecular Recognition, 2010)

HMA Compaction Study: Two Different Approaches - Rui Micaelo; Jaime Ribeiro; Maria Azevedo; Nuno Azevedo (11th ISAP – International Conference on Asphalt Pavements, 2010)

A hybrid collocation method for a nonlinear Volterra integral equation with weakly singular kernel - M. Rebelo; Diogo, T. (Journal of Computational and Applied Mathematics, 2010)

Improving the Quality of Web-GIS Modularity Using Aspects - A. Oliveira,; M. Urbieta; J. Araújo; A. Rodrigues; A. Moreira; S. Gordillo; G. Rossi (Proceedings of the 7th International Conference on the Quality of Information and Communications Technology (QUATIC 2010), 2010)
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In vitro studies with mammalian cell lines and gum arabic-coated magnetic nanoparticles - Bicho, A.; Roque, A.C.A.; Cardoso, A.S.; Domingos, P.; Batalha, I.L. (Journal of Molecular Recognition, 2010)

Ligand based nuclear magnetic resonance screening techniques - A. Viegas; A. L. Macedo; Cabrita, E. J. (Ligand Macromolecule Interactions in drug discovery, Methods in Molecular Biology, 2010)

A low cost optical tool for a 3D markerless motion capture - Y. Rybarczyk (33rd European Conference on Visual Perception, 2010)

MDGore: Towards Model-Driven and Goal-Oriented Requirements Engineering - R. Monteiro,; J. Araújo,; V. Amaral; P. Patricio, (16th IEEE International Requirements Engineering Conference (RE 2010), 2010)
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A Multi-product, Multi-depot Periodic Vehicle Routing Problem in a Reverse Logistics System - Ramos, Tania; Gomes, Maria I; Barbosa-povoa, Ana Paula (POMS 21st Annual Conference, 2010)
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Nanoparticles conjugated to anti-CD8 antibodies for targeted drug delivery - Bicho, A.; Peça, I.N.; Roque, A.C.A.; Cardoso, M.M. (International Journal of Pharmaceutics, 2010)

Preparation of a green cellulose-based affinity membrane for antibody purification - Barroso, T.G.; Temtem, M.; Hussain, A.; Aguiar-Ricardo, A.; Roque, A.C.A. (Journal of Membrane Science, 2010)

Punching of reinforced concrete slabs and experimental analysis and comparison with codes - Faria, Duarte; Biscaia, Hugo; Válter Lúcio; António Ramos (IABSE-Fib Codes in Structural Engineering – Developments and Needs for International Practice, 2010)
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Relating Feature Models to Other Models of a Software Product Line - A Comparative Study of FeatureMapper and VML* - F. Heidenreich,; P. Sanchez; Santos, J.; S. Zschaler; M. Alferez,; J. Araújo; L. Fuentes; U. Kulesza; A. Moreira; A. Rashid (Transactions on Aspect-Oriented Software Development VII, Special Issue on A Common Case Study for Aspect-Oriented Modeling, 2010)
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URL={http://www.springer.com/computer/lncs/transactions+aosd?SGWID=0-159403-0-0-0}

Sample Partitioning Estimation for Ergodic Diffusions: Application to Ornstein-Uhlenbeck Diffusion - Luís Ramos (Discussiones Mathematicae Probability and Statistics, 2010)
When a diffusion is ergodic its transition density converges to its invariant density, see Durrett (1998). This convergence enabled us to introduce a sample partitioning technique that gives in each sub-sample, maximum likelihood estimators. The averages of these being a natural choice as estimators. To compare our estimators with the optimal we obtained from martingale estimating functions, see Sorensen (1998), we used the Ornstein-Uhlenbeck process for which exact simulations can be carried out.

A Settlement Model for Ballast at Transition Zones - Varandas, J.N.; Hölscher, P.; Silva, M. A. G. (Proceedings of the Tenth International Conference on Engineering Computational Technology, 2010)
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paper 19

Singular integral operators on variable Lebesgue spaces over arbitrary Carleson curves - Karlovich, Alexei Yu. (Topics in Operator Theory: Operators, Matrices and Analytic Functions, Vol. 1. Operator Theory: Advances and Applications, 202, 2010)
In 1968, Israel Gohberg and Naum Krupnik discovered that local spectra of singular integral operators with piecewise continuous coefficients on Lebesgue spaces \(L^p(\Gamma)\) over Lyapunov curves have the shape of circular arcs. About 25 years later, Albrecht Böttcher and Yuri Karlovich realized that these circular arcs metamorphose to so-called logarithmic leaves with a median separating point when Lyapunov curves metamorphose to arbitrary Carleson curves. We show that this result remains valid in a more general setting of variable Lebesgue spaces \(L^{p(\cdot)}(\Gamma)\) where \(p:\Gamma\to(1,\infty)\) satisfies the Dini-Lipschitz condition. One of the main ingredients of the proof is a new condition for the boundedness of the Cauchy singular integral operator on variable Lebesgue spaces with weights related to oscillations of Carleson curves.

X-Ray Crystallography in Drug Discovery - Carvalho, Ana Luísa; Trincão, José; Romão, Maria João (Methods in molecular biology (Clifton, N.J.), 2010)
Macromolecular X-ray crystallography is an important and powerful technique in drug discovery, used by pharmaceutical companies in the discovery process of new medicines. The detailed analysis of crystal structures of protein-ligand complexes allows the study of the specific interactions of a particular drug with its protein target at the atomic level. It is used to design and improve drugs. The starting point of these studies is the preparation of suitable crystals of complexes with potential ligands, which can be achieved by using different strategies described in this chapter. In addition, an introduction to X-ray crystallography is given, highlighting the fundamental steps necessary to determine the three-dimensional structure of protein-ligand complexes, as well as some of the tools and criteria to validate crystal structures available in databases.
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Ash from a pulp mill boiler-Characterisation and vitrification - Ribeiro, A.S.M.a; Monteiro, R.C.C.b; Davim, E.J.R.a; Fernandes, M.H.V.a (Journal of Hazardous Materials, 2010)
The physical, chemical and mineralogical characterisation of the ash resulting from a pulp mill boiler was performed in order to investigate the valorisation of this waste material through the production of added-value glassy materials. The ash had a particle size distribution in the range 0.06-53μm, and a high amount of SiO2 (∼82wt%), which was present as quartz. To favour the vitrification of the ash and to obtain a melt with an adequate viscosity to cast into a mould, different amounts of Na2O were added to act as fluxing agent. A batch with 80wt% waste load melted at 1350°C resulting in a homogeneous transparent green-coloured glass with good workability. The characterisation of the produced glass by differential thermal analysis and dilatometry showed that this glass presents a stable thermal behaviour. Standard leaching tests revealed that the concentration of heavy metals in the leaching solution was lower than those allowed by the Normative. As a conclusion, by vitrification of batch compositions with adequate waste load and additive content it is possible to produce an ash-based glass that may be used in similar applications as a conventional silicate glass inclusively as a building ecomaterial. © 2010 Elsevier B.V.
cited By 10

Diversity of seed mineral composition of Phaseolus vulgaris L. germplasm - Pinheiro, C.; Baeta, J. P.; Pereira, A. M.; Domingues, H.; Ricardo, C. P. (Journal of Food Composition and Analysis, 2010)
A collection of 155 accessions of ancient Portuguese common beans (Phaseolus vulgaris L) was evaluated in relation to the content of 8 minerals (Zn, Cu, Fe, Mn, Ca, Mg, P and K) important for human nutrition. A high degree of variability for P. Fe, Zn, Cu, Mn and Ca was observed in the collection. Total correlation matrix analysis revealed the existence of two important sets of strong positive correlations (P <= 0.0001), one involving P, Fe, Zn, Cu and protein, and the other Ca and Mn. The principal component analysis showed that Zn, Fe and Cu are highly correlated to the first component (27% of variability) and Mn and Ca to the second component (22% of the variability). The high mineral variability observed in the seeds of this common bean collection could be useful for the selection of cultivars with higher nutrition value and for the improvement of seed nutrition quality traits. (C) 2010 Elsevier Inc. All rights reserved.
ISI Document Delivery No.: 622FM Times Cited: 0 Cited Reference Count: 28 Pinheiro, Carla Baeta, Jose P. Pereira, Ana M. Domingues, Herminia Ricardo, Candido P. Fundacao para a Ciencia e Tecnologia [SFRH/BPD/14535/2003] Thanks are due to Eng. Ma Conceicao Goncalves and Eng. Jose Casimiro Martins (Departamento de Solos da Estacao Agronomica Nacional) for helpful discussions and to Dr. Pedro Duarte (Instituto de Tecnologia Nuclear) for help with map drawing. CP acknowledges a grant SFRH/BPD/14535/2003 from Fundacao para a Ciencia e Tecnologia. ACADEMIC PRESS INC ELSEVIER SCIENCE SAN DIEGO

Diversity of seed mineral composition of Phaseolus vulgaris L. germplasm - Pinheiro, C.; Baeta, J. P.; Pereira, A. M.; Domingues, H.; Ricardo, C. P. (Journal of Food Composition and Analysis, 2010)
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Effects of tertiary treatment by fungi on organic compounds in a kraft pulp mill effluent - Rocha-Santos, T.; Ferreira, F.; Silva, L.; Freitas, A.C.; Pereira, R.; Diniz, M.; Castro, L.; Peres, I.; Duarte, A.C. (Environmental Science and Pollution Research, 2010)
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cited By (since 1996)8

Electrical Method to Study the Weak Molecular Movements at Nanometric Scale in Low Mobility Materials - Neagu, E. R.; Neagu, R. M.; Dias, C. J.; Lanca, M. C.; Inacio, P.; Marat-Mendes, J. N. (Advanced Materials Forum V, Pt 1 and 2, 2010)
For the characterization of the new materials and for a better understanding of the connection between structure and properties it is necessary to use more and more sensible methods to study molecular movement at nanometric scale. This paper presents the experimental basis for a new electrical method to study the fine molecular movements at nanometric scale in dielectric materials. The method will be applied for polar and non-polar materials characterization. Traditionally, the electrical methods used to study the molecular movements are based on the movements of the dipoles that are parts of the molecules. We have proposed recently a combined protocol to analyze charge injection/extraction, transport, trapping and detrapping in low mobility materials. The experimental results demonstrate that the method can be used to obtain a complex thermogram which contains information about all molecular movements, even at nanoscopic level. Actually during the charging process we are decorating the structure with space charge and during the subsequent heating we are observing an apparent peak and the genuine peaks that are related to charge de-trapping determined by the molecular movement. The method is very sensitive, very selective and allows to determinate the parameters for local and collective molecular movements, including the temperature dependence of the activation energy and the relaxation time.
Neagu, E. R. Neagu, R. M. Dias, C. J. Lanca, M. C. Inacio, P. Marat-Mendes, J. N. 5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais APR 05-08, 2009 Lisbon, PORTUGAL

Electrical Method to Study the Weak Molecular Movements at Nanometric Scale in Low Mobility Materials - Neagu, E. R.; Neagu, R. M.; Dias, C. J.; Lanca, M. C.; Inacio, P.; Marat-Mendes, J. N. (Advanced Materials Forum V, Pt 1 and 2, 2010)
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Electronic memory devices based on metal nanoparticles - Kiazadeh, Asal; Gomes, Henrique L.; Rosa da Costa, Ana M.; Moreira, José A.; de Leeuw, Dago M.; Meskers, Stefan C. J. (2010)
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Emerging Trends in Technological Innovation, First IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2010, Costa de Caparica, Portugal, February 22-24, 2010. Proceedings - Camarinha-Matos, Luis M; Pedro Pereira; Ribeiro, Luis (DoCEIS, 2010)
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Family 42 carbohydrate-binding modules display multiple arabinoxylan-binding interfaces presenting different ligand affinities - Ribeiro, T.; Santos-Silva, T; Alves, V. D.; Dias, FMV; Luís, A.S.; Prates, JAM; Ferreira, LMA; Romão, MJ; Fontes, CMGA (Biochimica et Biophysica Acta - Proteins and Proteomics, 2010)
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Floating gate memory paper transistor - Martins, R.; Pereira, L.; Barquinha, P.; Correia, N.; GONCALVES, G; Ferreira, I.; Dias, C.; Fortunato, E. (Oxide-Based Materials and Devices, 2010)
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Times Cited: 0Conference on Oxide-based Materials and DevicesJan 24-27, 2010San Francisco, CA

Floating gate memory paper transistor - Martins, R.; Pereira, L.; Barquinha, P.; Correia, N.; GONCALVES, G; Ferreira, I.; Dias, C.; Fortunato, E. (Oxide-Based Materials and Devices, 2010)
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Germination under aseptic conditions of different ecotypes of wild beet (Beta vulgaris L. ssp maritima) - Felisberto-Rodrigues, C; Ribeiro, IC; Veloso, M; Ricardo, C. P.; Pinheiro, C. (Seed Science and Technology, 2010)
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Germination under aseptic conditions of different ecotypes of wild beet (Beta vulgaris L. ssp maritima) - Felisberto-Rodrigues, C; Ribeiro, IC; Veloso, M; Ricardo, C. P.; Pinheiro, C. (Seed Science and Technology, 2010)
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GINSENG - Performance Control in Wireless Sensor Networks - Silva, R.M.; Jorge Sá Silva; Alberto Cardoso; Gil, P.; Cecílio, J.; Furtado, P.; Gomes, A.; Sreenan, C.; Donovan, T.O.; Noonan, M.; Klein, A.; Jerzak, Z.; et al. (4th Workshop on Real-World Wireless Sensor Networks - REALWSN2010, Colombo, Sri Lanka, 2010)
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Impact of a secondary treated bleached Kraft pulp mill effluent in both sexes of goldfish (Carassius auratus L.) - Diniz, M.S.; Peres, I.; Castro, L.; Freitas, A.C.; Rocha-Santos, T.A.P.; Pereira, R.; Duarte, A.C. (Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, 2010)
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cited By (since 1996)3

Medium Electric Field Electron Injection/Extraction at Metal-Dielectric Interface - Neagu, E. R.; Dias, C. J.; Lanca, M. C.; Igreja, R.; Marat-Mendes, J. N. (Advanced Materials Forum V, Pt 1 and 2, 2010)
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Times Cited: 0 Neagu, E. R. Dias, C. J. Lanca, M. C. Igreja, R. Marat-Mendes, J. N. 5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais APR 05-08, 2009 Lisbon, PORTUGAL

Medium Electric Field Electron Injection/Extraction at Metal-Dielectric Interface - Neagu, E. R.; Dias, C. J.; Lanca, M. C.; Igreja, R.; Marat-Mendes, J. N. (Advanced Materials Forum V, Pt 1 and 2, 2010)
The isothermal charging current and the isothermal discharging current in low mobility materials are analyzed either in terms of polarization mechanisms or in terms of charge injection/extraction at the metal-dielectric interface and the conduction current through the dielectric material. We propose to measure the open-circuit isothermal charging and discharging currents just to overpass the difficulties related to the analysis of the conduction mechanisms in dielectric materials. We demonstrate that besides a polarization current there is a current related to charge injection or extraction at the metal-dielectric interface and a reverse current related to the charge trapped into the shallow superficial or near superficial states of the dielectric and which can move at the interface in the opposite way that occurring during injection. Two important parameters can be determined (i) the highest value of the relaxation time for the polarization mechanisms which are involved into the transient current and (ii) the height of the potential barrier W-0 at the metal-dielectric interface. The experimental data demonstrate that there is no threshold field for electron injection/extraction at a metal-dielectric interface.
Neagu, E. R. Dias, C. J. Lanca, M. C. Igreja, R. Marat-Mendes, J. N. 5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais APR 05-08, 2009 Lisbon, PORTUGAL

Medium Electric Field Electron Injection/Extraction at Metal-Dielectric Interface - Neagu, E. R.; Dias, C. J.; Lanca, M. C.; Igreja, R.; Marat-Mendes, J. N. (Advanced Materials Forum V, Pt 1 and 2, 2010)
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Modelling of a Piezoelectric Polymer Film System for Biosensing Applications - Inacio, P.; Marat-Mendes, J. N.; Neagu, E.; Dias, C. J. (Advanced Materials Forum V, Pt 1 and 2, 2010)
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A novel 18O inverse labeling-based workflow for accurate bottom-up mass spectrometry quantification of proteins separated by gel electrophoresis - Santos, H. M.; Glez-Peña, D.; Reboiro-Jato, M.; Fdez-Riverola, F.; Diniz, M.S.; Lodeiro, C.; Capelo-Martínez, J.-L. (Electrophoresis, 2010)
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Properties Preservation in Distributed Execution of Petri Nets Models - Anikó Costa; Paulo E. S. Barbosa; Lu\'ıs Gomes; Franklin Ramalho; Jorge C. A. de Figueiredo; Antonio D. dos S. Junior (DoCEIS, 2010)
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Reverse engineering of inductive fault current limiters - J M Pina; P Suárez; M Ventim Neves; A Álvarez; A L Rodrigues (Journal of Physics: Conference Series, 2010)
The inductive fault current limiter is less compact and harder to scale to high voltage networks than the resistive one. Nevertheless, its simple construction and mechanical robustness make it attractive in low voltage grids. Thus, it might be an enabling technology for the advent of microgrids, low voltage networks with dispersed generation, controllable loads and energy storage. A new methodology for reverse engineering of inductive fault current limiters based on the independent analysis of iron cores and HTS cylinders is presented in this paper. Their electromagnetic characteristics are used to predict the devices' hysteresis loops and consequently their dynamic behavior. Previous models based on the separate analysis of the limiters' components were already derived, e.g. in transformer like equivalent models. Nevertheless, the assumptions usually made may limit these models' application, as shown in the paper. The proposed methodology obviates these limitations. Results are validated through simulations.
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Semantic Equations for Formal Models in the Model-Driven Architecture - Paulo E. S. Barbosa; Franklin Ramalho; Jorge Figueiredo; Anikó Costa; Lu\'ıs Gomes; Antônio Junior (DoCEIS, 2010)
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Short communication: Effect of kefir grains on proteolysis of major milk proteins - Ferreira, I.M.P.L.V.O.; Pinho, O.; Monteiro, D.; Faria, S.; Cruz, S.; Perreira, A; Roque, A. C.; Tavares, P. (Journal of Dairy Science, 2010)
The effect of kefir grains on the proteolysis of major milk proteins in milk kefir and in a culture of kefir grains in pasteurized cheese whey was followed by reverse phase-HPLC analysis. The reduction of kappa-, alpha-, and beta-caseins (CN), alpha-lactalbumin (alpha-LA), and beta-lactoglobulin (beta-LG) contents during 48 and 90 h of incubation of pasteurized milk (100 mL) and respective cheese whey with kefir grains (6 and 12 g) at 20 degrees C was monitored. Significant proteolysis of alpha-LA and kappa-, alpha-, and beta-caseins was observed. The effect of kefir amount (6 and 12 g/100 mL) was significant for alpha-LA and alpha- and beta-CN. alpha-Lactalbumin and beta-CN were more easily hydrolyzed than alpha-CN. No significant reduction was observed with respect to beta-LG concentration for 6 and 12 g of kefir in 100 mL of milk over 48 h, indicating that no significant proteolysis was carried out. Similar results were observed when the experiment was conducted over 90 h. Regarding the cheese whey kefir samples, similar behavior was observed for the proteolysis of alpha-LA and beta-LG: alpha-LA was hydrolyzed between 60 and 90% after 12 h (for 6 and 12 g of kefir) and no significant beta-LG proteolysis occurred. The proteolytic activity of lactic acid bacteria and yeasts in kefir community was evaluated. Kefir milk prepared under normal conditions contained peptides from proteolysis of alpha-LA and kappa-, alpha-, and beta-caseins. Hydrolysis is dependent on the kefir: milk ratio and incubation time. beta-Lactoglobulin is not hydrolyzed even when higher hydrolysis time is used. Kefir grains are not appropriate as adjunct cultures to increase beta-LG digestibility in whey-based or whey-containing foods.
Times Cited: 3 Ferreira, I. M. P. L. V. O. Pinho, O. Monteiro, D. Faria, S. Cruz, S. Perreira, A. Roque, A. C. Tavares, P.

Study of selected benzyl azides by UV photoelectron spectroscopy and mass spectrometry - R. M. Pinto; R. I. Olariu; J. Lameiras; F. T. Martins; A. A. Dias; G. J. Langley; P. Rodrigues; C. D. Maycock; J P Santos; M. F. Duarte; M. T. Fernandez; M. L. Costa (Journal of Molecular Structure, 2010)
Benzyl azide and the three methylbenzyl azides were synthesized and characterized by mass spectrometry (MS) and ultraviolet photoelectron spectroscopy (UVPES). The electron ionization fragmentation mechanisms for benzyl azide and their methyl derivatives were studied by accurate mass measurements and linked scans at constant B/E. For benzyl azide, in order to clarify the fragmentation mechanism, labelling experiments were performed. From the mass analysis of methylbenzyl azides isomers it was possible to differentiate the isomers ortho, meta and para. The abundance and nature of the ions resulting from the molecular ion fragmentation, for the three distinct isomers of substituted benzyl azides, were rationalized in terms of the electronic properties of the substituent. Concerning the para-isomer, IRC calculations were performed at UHF/6-31G(d) level. The photoionization study of benzyl azide, with He(I) radiation, revealed five bands in the 8-21 eV ionization energies region. From every photoelectron spectrum of methylbenzyl azides isomers it has been identified seven bands, on the same range as the benzyl azide. Interpretation of the photoelectron spectra was accomplished applying Koopmans' theorem to the SCF orbital energies obtained at HF/6-311++G(d, p) level.
Keywords: Benzyl azides UVPES EIMS IRC calculations

Study of selected benzyl azides by UV photoelectron spectroscopy and mass spectrometry - R. M. Pinto; R. I. Olariu; J. Lameiras; F. T. Martins; A. A. Dias; G. J. Langley; P. Rodrigues; C. D. Maycock; J P Santos; M. F. Duarte; M. T. Fernandez; M. L. Costa (Journal of Molecular Structure, 2010)
Benzyl azide and the three methylbenzyl azides were synthesized and characterized by mass spectrometry (MS) and ultraviolet photoelectron spectroscopy (UVPES). The electron ionization fragmentation mechanisms for benzyl azide and their methyl derivatives were studied by accurate mass measurements and linked scans at constant B/E. For benzyl azide, in order to clarify the fragmentation mechanism, labelling experiments were performed. From the mass analysis of methylbenzyl azides isomers it was possible to differentiate the isomers ortho, meta and para. The abundance and nature of the ions resulting from the molecular ion fragmentation, for the three distinct isomers of substituted benzyl azides, were rationalized in terms of the electronic properties of the substituent. Concerning the para-isomer, IRC calculations were performed at UHF/6-31G(d) level. The photoionization study of benzyl azide, with He(I) radiation, revealed five bands in the 8-21 eV ionization energies region. From every photoelectron spectrum of methylbenzyl azides isomers it has been identified seven bands, on the same range as the benzyl azide. Interpretation of the photoelectron spectra was accomplished applying Koopmans' theorem to the SCF orbital energies obtained at HF/6-311++G(d, p) level.
Webpage CFA-FCTUNLJPS-Ref42

Ultrasonic multiprobe as a new tool to overcome the bottleneck of throughput in workflows for protein identification relaying on ultrasonic energy - Santos, H. M.; Carreira, R.; Diniz, M.S.; Rivas, M. G.; Lodeiro, C.; Moura, JJG; Capelo, J. L. (Talanta, 2010)
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{Enzymatic degradation of 3D scaffolds of starch-poly-(?-caprolactone) prepared by supercritical fluid technology} - Duarte, Ana Rita C; Mano, Jo?o F.; Reis, Rui L (Polymer Degradation and Stability, 2010)
Starch-based polymers have been proposed for different tissue engineering applications due to their inherent properties. In this work, a polymeric blend of starch-poly-(?-caprolactone) (SPCL) was processed using supercritical fluid technology, namely, by supercritical assisted phase inversion. As SPCL is a biodegradable polymer, the matrices produced are susceptible of undergoing enzymatic degradation upon implantation in the human body. In vitro assessment of the enzymatic degradation of SPCL was carried out in different buffer solutions containing a-amylase and/or lipase. The effect of the presence ofthese enzymes was studied by monitoring different parameters in order to characterise both bulk and the surface of the scaffolds. As regards to bulk analysis, weight loss of the samples incubated for 1, 3, 7, 14 and 21 days was determined, further differential scanning calorimetry was carried out. The morphology of the scaffolds after these periods was analysed by micro-computed tomography (?-CT) and surface chemistry was characterised by infra-red spectroscopy and contact angle measurements. Results suggest that SPLC scaffolds undergo bulk degradation, which is typically characterised by hydrolysis of chemical bonds in the polymer chain at the centre of the matrix, resulting in a highly porous material. ? 2010 Elsevier Ltd. All rights reserved.
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Keywords: Enzymatic degradation; natural polymers; Polycaprolactone; starch; Supercritical fluids; tissue engineering

{Hybrid 3D structure of poly(d,l-lactic acid) loaded with chitosan/chondroitin sulfate nanoparticles to be used as carriers for biomacromolecules in tissue engineering} - Santo, V.E.; Duarte, A.R.C.; Gomes, M.E.; Mano, J.F.; Reis, R.L. (Journal of Supercritical Fluids, 2010)
In the tissue engineering (TE) field, the concept of producing multifunctional scaffolds, capable not only of acting as templates for cell transplantation but also of delivering bioactive agents in a controlled manner, is an emerging strategy aimed to enhance tissue regeneration. In this work, a complex hybrid release system consisting in a three-dimensional (3D) structure based on poly(d,l-lactic acid) (PDLLA) impregnated with chitosan/chondroitin sulfate nanoparticles (NPs) was developed. The scaffolds were prepared by supercritical fluid foaming at 200 bar and 35 °C, and were then characterized by scanning electron microscopy (SEM) and micro-CT. SEM also allowed to assess the distribution of the NPs within the structure, showing that the particles could be found in different areas of the scaffold, indicating a homogeneous distribution within the 3D structure. Water uptake and weight loss measurements were also carried out and the results obtained demonstrated that weight loss was not significantly enhanced although the entrapment of the NPs in the 3D structure clearly enhances the swelling of the structure. Moreover, the hybrid porous biomaterial displayed adequate mechanical properties for cell adhesion and support. The possibility of using this scaffold as a multifunctional material was further evaluated by the incorporation of a model protein, bovine serum albumin (BSA), either directly into the PDLLA foam or in the NPs that were eventually included in the scaffold. The obtained results show that it is possible to achieve different release kinetics, suggesting that this system is a promising candidate for dual protein delivery system for TE applications. © 2010 Elsevier B.V.
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Keywords: chitosan; Chondroitin sulfate; Controlled release; l-lactic acid); Poly(d; Scaffolds; Supercritical fluid foaming; tissue engineering

{Novel 3D scaffolds of chitosan-PLLA blends for tissue engineering applications: Preparation and characterization} - Duarte, Ana Rita C; João F. Mano; Reis, Rui L (Journal of Supercritical Fluids, 2010)
This work addresses the preparation of 3D porous scaffolds of blends of chitosan and poly(l-lactic acid), CHT and PLLA, using supercritical fluid technology. Supercritical assisted phase-inversion was used to prepare scaffolds for tissue engineering purposes. The physicochemical and biological properties of chitosan make it an excellent material for the preparation of drug delivery systems and for the development of new biomedical applications in many fields from skin to bone or cartilage regeneration. On the other hand, PLLA is a synthetic biodegradable polymer widely used for biomedical applications. Supercritical assisted phase-inversion experiments were carried out in samples with different polymer ratios and different polymer solution concentrations. The effect of CHT:PLLA ratio and polymer concentration and on the morphology and topography of the scaffolds was assessed by SEM and Micro-CT. Infra-red spectroscopic imaging analysis of the scaffolds allowed a better understanding on the distribution of the two polymers within the matrix. This work demonstrates that supercritical fluid technology constitutes a new processing technology, clean and environmentally friendly for the preparation of scaffolds for tissue engineering using these materials. © 2010 Elsevier B.V.
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Keywords: chitosan; Poly(l-lactic acid); Scaffolds; Supercritical fluids; tissue engineering

{Osteogenic induction of hBMSCs by electrospun scaffolds with dexamethasone release functionality} - A. Martins; Duarte, A.R.C.; Faria, S.; Marques, A.P.; Reis, R.L.; Neves, N.M. (Biomaterials, 2010)
Electrospun structures were proposed as scaffolds owing to their morphological and structural similarities with the extracellular matrix found in many native tissues. These fibrous structures were also proposed as drug release systems by exploiting the direct dependence of the release rate of a drug on the surface area. An osteogenic differentiation factor, dexamethasone (DEX), was incorporated into electrospun polycaprolactone (PCL) nanofibers at different concentrations (5, 10, 15 and 20 wt.{%} polymer), in a single-step process. The DEX incorporated into the polymeric carrier is in amorphous state, as det ermined by DSC, and does not influence the typical nanofibers morphology. In vitro drug release studies demonstrated that the dexamethasone release was sustained over a period of 15 days. The bioactivity of the released dexamethasone was assessed by cultivating human bone marrow mesenchymal stem cells (hBMSCs) on 15 wt.{%} DEX-loaded PCL NFMs, under dexamethasone-absent osteogenic differentiation medium formulation. An increased concentration of alkaline phosphatase and deposition of a mineralized matrix was observed. Phenotypic and genotypic expression of osteoblastic-specific markers corroborates the osteogenic activity of the loaded growth/differentiation factor. Overall data suggests that the electrospun biodegradable nanofibers can be used as carriers for the sustained release of growth/differentiation factors relevant for bone tissue engineering strategies. © 2010 Elsevier Ltd.
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Keywords: Bone tissue engineering; Drug release; Mesenchymal stem cells; Molecular biology; Polycaprolactone

{Preparation of chitosan scaffolds for tissue engineering using supercritical fluid technology} - Duarte, A.R.C.; Mano, J.F.; Reis, R.L. (Materials Science Forum, 2010)
The aim of this study was to evaluate the possibility of preparing chitosan porous matrixes using supercritical fluid technology. Supercritical immersion precipitation technique was used to prepare scaffolds of a natural biocompatible polymer, chitosan, for tissue engineering purposes. The physicochemical and biological properties of chitosan make it an excellent material for the preparation of drug delivery systems and for the development of new biomedical applications in many fields from skin to bone or cartilage. Immersion precipitation experiments were carried out at different operational conditions in order to optimize the processing method. The effect of different organic solvents on the morphology of the scaffolds was assessed. Additionally, different parameters that influence the process were tested and the effect of the processing variables such as polymer concentration, temperature and pressure in the chitosan scaffold morphology, porosity and interconnectivity was evaluated by micro computed tomography. The preparation of a highly porous and interconnected structure of a natural material, chitosan, using a clean and environmentally friendly technology constitutes a new processing technology for the preparation of scaffolds for tissue engineering using these materials. © (2010) Trans Tech Publications.
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Keywords: Biopolymers; chitosan; Phase inversion; Scaffolds; Supercritical fluids; tissue engineering

{Supercritical phase inversion of starch-poly($ε$-caprolactone) for tissue engineering applications} - Duarte, Ana Rita C; João F. Mano; Reis, Rui L (Journal of Materials Science: Materials in Medicine, 2010)
In this work, a starch-based polymer, namely a blend of starch-poly(epsilon-caprolactone) was processed by supercritical assisted phase inversion process. This processing technique has been proposed for the development of 3D structures with potential applications in tissue engineering applications, as scaffolds. The use of carbon dioxide as non-solvent in the phase inversion process leads to the formation of a porous and interconnected structure, dry and free of any residual solvent. Different processing conditions such as pressure (from 80 up to 150 bar) and temperature (45 and 55 degrees C) were studied and the effect on the morphological features of the scaffolds was evaluated by scanning electron microscopy and micro-computed tomography. The mechanical properties of the SPCL scaffolds prepared were also studied. Additionally, in this work, the in vitro biological performance of the scaffolds was studied. Cell adhesion and morphology, viability and proliferation was assessed and the results suggest that the materials prepared are allow cell attachment and promote cell proliferation having thus potential to be used in some for biomedical applications.
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Heterogeneity in susceptibility to infection can explain high reinfection rates - Rodrigues, Paula; Margheri, Alessandro; Rebelo, Carlota; Gomes, M. Gabriela M. (JOURNAL OF THEORETICAL BIOLOGY, 2009)
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Isolation and characterization of a new Cu-Fe protein from Desulfovibrio aminophilus DSM12254 - Rivas, M. G.; Mota, C. S.; Pauleta, S. R.; Carepo, M. S. P.; Folgosa, F; Andrade, S. L. A.; Fauque, G; Pereira, AS; Tavares, P.; Calvete, JJ; Moura, I; Moura, JJG (Journal of Inorganic Biochemistry, 2009)
The isolation and characterization of a new metalloprotein containing Cu and Fe atoms is reported. The as-isolated Cu-Fe protein shows an UV-visible spectrum with absorption bands at 320 nm, 409 nm and 615 nm. Molecular mass of the native protein along with denaturating electrophoresis and mass spectrometry data show that this protein is a multimer consisting of 14 +/- 1 subunits of 15254.3 +/- 7.6 Da. Mossbauer spectroscopy data of the as-isolated Cu-Fe protein is consistent with the presence of [2Fe-2S](2+) centers. Data interpretation of the dithionite reduced protein suggest that the metallic cluster could be constituted by two ferromagnetically coupled [2Fe-2S](+) spin delocalized pairs. The biochemical properties of the Cu-Fe protein are similar to the recently reported molybdenum resistance associated protein from Desulfovibrio, D. alaskensis. Further-more, a BLAST search from the DNA deduced amino acid sequence shows that the Cu-Fe protein has homology with proteins annotated as zinc resistance associated proteins from Desulfovibrio, D. alaskensis, D. vulgaris Hildenborough, D. piger ATCC 29098. These facts suggest a possible role of the Cu-Fe protein in metal tolerance. (C) 2009 Published by Elsevier Inc.
Times Cited: 1 Rivas, Maria G. Mota, Cristiano S. Pauleta, Sofia R. Carepo, Marta S. P. Folgosa, Filipe Andrade, Susana L. A. Fauque, Guy Pereira, Alice S. Tavares, Pedro Calvete, Juan J. Moura, Isabel Moura, Jose J. G. 1st Latin American Meeting on Biological Inorganic Chemistry (LABIC2008) AUG 31-SEP 04, 2008 Iguazu Falls, BRAZIL SI

{Nanostructured silicon and its application to solar cells, position sensors and thin film transistors} - Martins, R.; Raniero, L.; Pereira, L.; Costa†, D.; Águas, H.; Pereira, S.; Silva, L.; A Gonçalves; Ferreira, I.; Fortunato, E. (Philosophical Magazine, 2009)
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Energia nuclear no panorama nacional: benefícios vs custos e análise de sustentabilidade - Jerónimo Cunha (FCT-UNL, 2009)
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Influence of feeding strategies of mixed microbial cultures on the chemical composition and microstructure of copolyesters P(3HB-co-3HV) analyzed by NMR and statistical analysis - Ivanova, G.; Serafim, L. S.; Lemos, P. C.; Ramos, A. M.; Reis, M. A. M.; Cabrita, E. J. (Magnetic Resonance in Chemistry, 2009)
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A new tripodal poly-imine indole-containing ligand: Synthesis, complexation, spectroscopic and theoretical studies - Pedras, B.; Oliveira, E.; Santos, H.; Rodriguez, L.; Crehuet, R.; Aviles, T.; Capelo, J. L.; Lodeiro, C. (Inorganica Chimica Acta, 2009)
A novel flexible tripodal ligand derived from 3-methylindole, ("InTREN" L), and its mononuclear Zn(II), Cu(II), Ni(II), Hg(II) and Pd(II) complexes are described. All compounds gave analytically pure solid samples. Characterisation of the compounds was accomplished by (1)H NMR, IR and absorption spectroscopies, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and elemental analysis and their geometry optimized using density functional theory (DFT).Time-dependent-density functional theory (TD-DFT) calculations have been used to assign the lowest energy absorption bands of the free ligand and the Zn(II) complex. The system is a very good candidate for in situ recognition/coordination effects by MALDI-TOF-MS spectrometry and absorption spectroscopy. The presence of three indole groups in InTREN opens up the possibility to synthesize new three-dimensional self-assembly supramolecular structures. (C) 2008 Elsevier B.V. All rights reserved.
437TGTimes Cited:6Cited References Count:52
Keywords: atomic-absorption-spectrometry; azomethine ligands; derivatives; fluorescent chemosensors; indole; intramolecular excimer formation; luminescent sensors; macrocyclic ligands; metal-ions; molecular recognition; photophysical properties; receptors; tripodal ligands

Crystallization and crystallographic analysis of the apo form of the orange protein (ORP) from Desulfovibrio gigas - Najmudin, S.; Bonifacio, C.; Duarte, A. G.; Pauleta, S. R.; Moura, I; Moura, J J; Romao, MJ (Acta Crystallogr Sect F Struct Biol Cryst Commun, 2009)
The orange-coloured protein (ORP) from Desulfovibrio gigas is a 12 kDa protein that contains a novel mixed-metal sulfide cluster of the type [S(2)MoS(2)CuS(2)MoS(2)]. Diffracting crystals of the apo form of ORP have been obtained. Data have been collected for the apo form of ORP to 2.25 A resolution in-house and to beyond 2.0 A resolution at ESRF, Grenoble. The crystals belonged to a trigonal space group, with unit-cell parameters a = 43, b = 43, c = 106 A.
Najmudin, ShabirBonifacio, CeciliaDuarte, Americo GPauleta, Sofia RMoura, IsabelMoura, Jose J GRomao, Maria JResearch Support, Non-U.S. Gov'tEnglandActa crystallographica. Section F, Structural biology and crystallization communicationsActa Crystallogr Sect F Struct Biol Cryst Commun. 2009 Jul 1;65(Pt 7):730-2. Epub 2009 Jun 30.
Keywords: Apoproteins/*chemistry; Bacterial Proteins/*chemistry; Crystallization; Crystallography, X-Ray; Desulfovibrio gigas/*chemistry; Electrophoresis, Polyacrylamide Gel

Analysis of Interoperability Value Proposition in the Architectural, Engineering and Construction Sector - Grilo A; Jardim-Goncalves R; Cruz-Machado V (2009 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING AND ENGINEERING MANAGEMENT, VOLS 1-4, 2009)
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Analysis of Interoperability Value Proposition in the Architectural, Engineering and Construction Sector - Grilo António; Gonçalves Ricardo; Cruz-Machado Virgílio (2009)
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Analysis of interoperability value proposition on the AEC sector - Grilo A; Jardim-Goncalves R (2009)
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Challenges For The Development of Interoperable Information Systems in Healthcare Organizations - Grilo A; Lapao LV; Jardim-Goncalves R; Cruz-Machado V (I-ESA 2009: INTERNATIONAL CONFERENCE ON INTEROPERABILITY FOR ENTERPRISE SOFTWARE AND APPLICATIONS CHINA, PROCEEDINGS, 2009)
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Challenges for the Development of Interoperable Information Systems in Healthcare Organizations - Grilo A; Lapao LV; Jardim-Goncalves R; Cruz-Machado V (2009)
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Cretaceous paleogeography, paleoclimatology, and amniote biogeography of the low and mid-latitude South Atlantic Ocean - Jacobs, LL; O. Mateus; M. J. Polcyn; Schulp, AS; Scotese, CR; Goswami, A; Ferguson, KM; Robbins, JA; Vineyard, DP; Neto, AB (BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE, 2009)
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SOA4BIM: Putting the building and construction industry in the Single European Information Space - Jardim-Goncalves R; Grilo A (Automation in Construction, 2009)
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A Systematic Study of Solution and Processing Parameters on Nanofiber Morphology Using a New Electrospinning Apparatus - Henriques C; Vidinha R; Botequim D; Borges JP; Silva JAMC (JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2009)
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{ Paper field effect transistor } - Fortunato, E.; Correia, Nuno; Barquinha, Pedro; Costa, Cláudia; Pereira, Lu\'ıs; Gonçalves, Gonçalo; Martins, Rodrigo (2009)
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{ Zinc oxide and related compounds: order within the disorder } - Martins, R.; Pereira, Luisa; Barquinha, P.; Ferreira, I.; Prabakaran, R.; GONCALVES, G; Goncalves, A.; Fortunato, E. (2009)
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Crystallization and crystallographic analysis of the apo form of the orange protein (ORP) from Desulfovibrio gigas. (vol F65, pg 730, 2009) - Najmudin, S.; Bonifacio, C.; Duarte, A. G.; Pauleta, S. R.; Moura, I; Moura, JJG; Romao, MJ (Acta Crystallographica Section F-Structural Biology and Crystallization Communications, 2009)
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Times Cited: 0 Najmudin, Shabir Bonifacio, Cecilia Duarte, Americo G. Pauleta, Sofia R. Moura, Isabel Moura, Jose J. G. Romao, Maria J. Part 8

Modeling Complex Petri Nets Operations in the Model-Driven Architecture - Paulo E. S. Barbosa; Anikó Costa; Jorge Figueiredo; Franklin Ramalho; Lu\'ıs Gomes; Antônio Junior (IECON'2009 - 35th Annual Conference of the IEEE Industrial Electronics Society, 2009)
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Parâmetros qualitativos para a Avaliação dos Riscos na Indústria da Construção - Abel Pinto; Rita A. Ribeiro; Isabel L. Nunes (Riscos Públicos e Industriais - III Encontro Nacional de Riscos, Segurança e Fiabilidade, 2009)
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Parâmetros qualitativos para a Avaliação dos Riscos na Indústria da Construção - Abel Pinto; Rita A. Ribeiro; Isabel L. Nunes (Riscos Públicos e Industriais - III Encontro Nacional de Riscos, Segurança e Fiabilidade, 2009)
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Room-Temperature Cosputtered HfO2-Al2O3 Multicomponent Gate Dielectrics - Pei, Z. L.; Pereira, L.; GONCALVES, G; Barquinha, P.; N. Franco; E. Alves; Rego, A. M. B.; Martins, R.; Fortunato, E. (Electrochemical and Solid State Letters, 2009)
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Times Cited: 11

Synthesis and characterization of Co and Ni complexes stabilized by keto- and acetamide-derived P,O-type phosphine ligands - Agostinho, M.; Rosa, V.; Avilés, T.; Welter, R.; Braunstein, P. (Journal of the Chemical Society. Dalton Transactions, 2009)
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Cited By :9Export Date: 17 June 2020

Orchestration of Middleware Services - Paulino, Hervé; Paulo Cancela; Tiago Franco (On the Move to Meaningful Internet Systems: OTM 2009 Workshops, Confederated International Workshops and Posters, 2009)
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URL={http://asc.di.fct.unl.pt/ herve/papers/OHMS-DOA.pdf}

Detecting Feature Interactions in SPL Requirements Analysis Models - M. Alferez,; A. Moreira,; U. Kulesza,; J. Araújo,; R. Mateus,; V. Amaral (Proceedings of the 1st International Workshop on Feature-Oriented Software Development (FOSD), 2009)
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URL={http://http://portal.acm.org/ft_gateway.cfm?id=1629738&type=pdf}

A Logic Programming System for Evolving Programs with Temporal Operators - Royval, Alfredo Gabaldon; Leite, João Alexandre Carvalho Pinheiro; Alferes, José Júlio Alves (Lecture Notes in Computer Science, 2009)
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Bio-recognition and detection using liquid crystals - Hussain, A.; Pina, A.S.; Roque, A.C.A. (Biosensors & Bioelectronics, 2009)

Biocompatible and bioactive gum Arabic coated iron oxide magnetic nanoparticles - Roque, A.C.A.; Bicho, A.; Batalha, I.L.; Cardoso, A.S.; Hussain, A. (Journal of Biotechnology, 2009)

A class-wide phylogenetic assessment of Dothideomycetes - Schoch, CL; Crous, PW; Groenewald, JZ; Boehm, EWA; Burgess, TI; de Gruyter, J; de Hoog, GS; Dixon, LJ; Grube, M; Gueidan, C; Harada, Y; Hatakeyama, S; et al. (Studies in Mycology, 2009)
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CUSTOMIZABLE GAS-GAP HEAT SWITCH - Martins, D; I. Catarino; U Schroder; Ricardo, J; Patricio, R; Duband, L; G. Bonfait (CEC 20, 2009)
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D1.5 - Tool suite for aspect-oriented, model-driven requirements engineering - M. Alferez,; V. Amaral,; J. Araújo,; P. Greenwood; U. Kulesza,; R. Mateus; A. Moreira; Pimentel, A.; A. Rummler; A. Rashid; R. Ribeiro; Santos, J. (Faculdade de Ci, 2009)
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Discrete Element Modelling of Field Asphalt Compaction - Rui Micaelo; Nuno Azevedo; Jaime Ribeiro; Maria Azevedo (6th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, 2009)

Energy Storage Unit: solid state demonstrators at 20 K and 6 K - J. Afonso; I. Catarino; Martins, D; Ricardo, J; Patricio, R; Duband, L; G. Bonfait (Space Cryogenics Workshop, 2009)
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Estudo da Compactação de Misturas Betuminosas: Ensaios de Campo e Modelação Numérica - Rui Micaelo; Jaime Ribeiro; Maria Azevedo; Nuno Azevedo (XV Congresso Ibero-Latinoamericano do Asfalto, 2009)

Modeling Location-Aware Behaviour in Web-GIS Using Aspects - A. Oliveira,; M. Urbieta; J. Araújo,; A. Rodrigues; A. Moreira; S. Gordillo; G. Rossi (ICEIS 2009, 2009)
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A multi-product, multi-depot vehicle routing problem in a reverse logistics system: comparative study of an exact formulation and a heuristic algorithm - Ramos, Tania Rodrigues Pereira; Gomes-Salema, Maria Isabel; Barbosa-povoa, Ana Paula (Livro de actas da 14º congresso da APDIO, IO2009, 2009)
Keywords: heuristic; milp formulation; reverse logistics; vehicle routing problem

Quality Improvement for Use Case Models - R. Ramos,; J. Castro; J. Araújo,; A. Moreira; F. Alencar (XXIII Simposio Brasileiro de Engenharia de Software (SBES), 2009)
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Reabilitação de Pontes Históricas de Alvenaria – Um Caso de Estudo - Rodrigues, Neuza; António Ramos (ASCP'09 – 1º Congresso de Segurança e Conservação de Pontes ASCP, 2009)
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Reduced-bias tail index estimators under a third-order framework. - Caeiro, Frederico; Gomes, M.Ivette; Rodrigues, Lígia Henriques (Commun. Stat., Theory Methods, 2009)
{Summary: We are interested in the comparison, under a third-order framework, of classes of second-order, reduced-bias tail index estimators, giving particular emphasis to minimum-variance reduced-bias estimators of the tail index $γ$. The full asymptotic distributional properties of the proposed classes are derived under a third-order framework and the estimators are compared with other alternatives, not only asymptotically, but also for finite samples through Monte Carlo techniques. An application to the log-exchange rates of the Euro against the USA Dollar is also provided.}
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Keywords: heavy tails; semi-parametric estimation; statistics of extremes}; {bias estimation

Some Asymptotic Expansions and Distribution Approximations outside a CLT Context - Luís Ramos; Manuel L. Esquível; João T. Mexia; João L. Silva (Proceedings of 6th St. Petersburg Workshop on Simulation, 2009)
Some asymptotic expansions non necessarily related to the central limit theorem are discussed. After observing that the smoothing inequality of Esseen implies the proximity, in the Kolmogorov distance sense, of the distributions of the random variables of two random sequences satisfying a sort of general asymptotic relation, two instances of this observation are presented. A first example, partially motivated by the the statistical theory of high precision measurements, is given by a uniform asymptotic approximation to $(g(X+ μ_n))_{n ın \mathbbm{N}}$, where $g$ is some smooth function, $X$ is a random variable having a moment and a bounded density and $(μ_{n})_{n ın \mathbbm{N}}$ is a sequence going to infinity; the multivariate case as well as the proofs and a complete set of references will be published elsewhere. We next present a second class of examples given by a randomization of the interesting parameter in some classical asymptotic formulas, namely, a generic Laplace's type integral, by the sequence $(μ_n X)_{n ın \mathbbm{N}}$, $X$ being a Gamma distributed random variable. Finally, a simulation study of this last example is presented in order to stress the quality of asymptotic approximations proposed.

Strengthening of reinforced concrete flat slabs using post-tensioning with anchorages by bonding - Faria, D M V; Lúcio, V J G; Ramos, A M P (Fib symposium–concrete: 21st century superhero, London, 2009)
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Synthesis and characterization of novel indole-containing half-crowns as new emissive metal probes - Rocha A., Marques M. Manuel B.*, (Tetrahedron Lett., 2009)

Understanding the Behavior of Transactional Memory Applications - João M. Lourenço; Ricardo J. Dias; Luís, João; Rebelo, Miguel; Pessanha, Vasco (Proceedings of the 7th Workshop on Parallel and Distributed Systems: Testing, Analysis, and Debugging (PADTAD'09), 2009)
Transactional memory is a new trend in concurrency control that was boosted by the advent of multi-core processors and the near to come many-core processors. It promises the performance of finer grain with the simplicity of coarse grain threading. However, there is a clear absence of software development tools oriented to the transactional memory programming model, which is confirmed by the very small number of related scientific works published until now. This paper describes ongoing work. We propose a very low overhead monitoring framework, developed specifically for monitoring TM computations, that collects the transactional events into a single log file, sorted in a global order. This framework is then used by a visualization tool to display different types of charts from two categories: statistical charts and thread-time space diagrams. These last diagrams are interactive, allowing to identify conflicting transactions. We use the visualization tool to analyse the behavior of two different, but similar, testing applications, illustrating how it can be used to better understand the behavior of these transactional memory applications.
Keywords: concurrency; debugging; monitoring; profiling; software transactional memory; testing; visualization

VML* - P. Sanchez,; J. Santos,; M. Alferez,; A. Rashid; L. Fuentes; A. Moreira; J. Araújo,; U. Kulesza, (Proceedings of the International Conference on Software Language Engineering (SLE), 2009)
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Anisotropic Solutions Applied to a Smart Damper - Silva, Tiago A.N.; Leal, C R; A. Rodrigues; Bento, M F; Travassos, João M C (2009)
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An Approach to Fault Diagnosis of Rolling Bearings - Roque, A A; Silva, Tiago A.N.; Calado, J M F; Dias, J C Q (World Scientific and Engineering Academy and Society (WSEAS), 2009)
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Biological treatment of the effluent from a bleached kraft pulp mill using basidiomycete and zygomycete fungi - Freitas, A.C.; Ferreira, F.; A. M. Costa; Pereira, R.; Antunes, S.C.; Gonçalves, F.; Rocha-Santos, T.A.P.; Diniz, M.S.; Castro, L.; Peres, I.; Duarte, A.C. (Science of the Total Environment, 2009)
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cited By (since 1996)19

Checking Semantics Equivalence of MDA Transformations in Concurrent Systems - Paulo E. S. Barbosa; Franklin Ramalho; Jorge C. A. de Figueiredo; Antonio D. dos S. Junior; Anikó Costa; Lu\'ıs Gomes (J. UCS, 2009)
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Co-design strategy approach of lna, oscillator, and mixer - Oliveira, JP; Oliveira, L.; J. Ferreira; Bastos, I.; Michalak, T.; Pankiewicz, P.; Nowacki, B.; Makosa, P.; Rybarczyk, A. (Electronics and Telecommunications Quarterly, 2009)
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Conventional and HTS Disc motor with pole variation control - D Inácio; J. A. Inácio; J. Pina; S Valtchev; M. Neves; J. Martins; A. Rodrigues (2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 2009)
In this paper, a poly-phase disc motor innovative feeding and control strategy, based on a variable poles approach, and its application to a high temperature superconductor (HTS) disc motor, are presented. The stator windings may be electronically commutated to implement a 2, 4, 6 or 8 poles winding, thus changing the motor's torque?speed characteristics. The motor may be a conventional induction motor with a conductive disc rotor, or a new HTS disc motor, with conventional copper windings at its two iron semi-stators and a HTS disc as a rotor. The conventional induction motor's operation principle is related with the induced electromotive forces in the conductive rotor. Its behaviour, characteristics and modelling through Steinmetz and others theories are well known. The operation principle of the motor with HTS rotor, however, is rather different and is related with vortices' dynamics and pinning characteristics; this is a much more complex process than induction, and its modelling is quite complicated. In this paper, the operation was simulated through finite-elements commercial software (FLUX2D), whereas superconductivity was simulated by the E-J power law. The electromechanical performance of both motor's computed are compared. Considerations about the systems overall efficiency, including cryogenics, are also discussed.

Conventional and HTS Disc motor with pole variation control - D Inácio; J. A. Inácio; J. Pina; S Valtchev; M. Neves; J. Martins; A. Rodrigues (2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 2009)
In this paper, a poly-phase disc motor innovative feeding and control strategy, based on a variable poles approach, and its application to a high temperature superconductor (HTS) disc motor, are presented. The stator windings may be electronically commutated to implement a 2, 4, 6 or 8 poles winding, thus changing the motor's torque?speed characteristics. The motor may be a conventional induction motor with a conductive disc rotor, or a new HTS disc motor, with conventional copper windings at its two iron semi-stators and a HTS disc as a rotor. The conventional induction motor's operation principle is related with the induced electromotive forces in the conductive rotor. Its behaviour, characteristics and modelling through Steinmetz and others theories are well known. The operation principle of the motor with HTS rotor, however, is rather different and is related with vortices' dynamics and pinning characteristics; this is a much more complex process than induction, and its modelling is quite complicated. In this paper, the operation was simulated through finite-elements commercial software (FLUX2D), whereas superconductivity was simulated by the E-J power law. The electromechanical performance of both motor's computed are compared. Considerations about the systems overall efficiency, including cryogenics, are also discussed.
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Conventional and HTS disc motor with pole variation control - D Inácio; S Inácio; J. Pina; S Valtchev; M V Neves; Martins, J.F.A.; A L Rodrigues (POWERENG 2009 - 2nd International Conference on Power Engineering, Energy and Electrical Drives Proceedings, 2009)
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Cretaceous paleogeography, paleoclimatology, and amniote biogeography of the low and mid-latitude South Atlantic Ocean - Jacobs, LL; O. Mateus; M. J. Polcyn; Schulp, AS; Scotese, CR; Goswami, A; Ferguson, KM; Robbins, JA; Vineyard, DP; Neto, AB (Bulletin de la Societe Geologique de France, 2009)
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The effectiveness of a biological treatment with Rhizopus oryzae and of a photo-Fenton oxidation in the mitigation of toxicity of a bleached kraft pulp mill effluent - Pereira, R.; Antunes, S.C.; Gonçalves, A.M.M.; Marques, S.M.; Gonçalves, F.; Ferreira, F.; Freitas, A.C.; Rocha-Santos, T.A.P.; Diniz, M.S.; Castro, L.; Peres, I.; Duarte, A.C. (Water Research, 2009)
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cited By (since 1996)10

Effects of ECF-Kraft pulp mill effluent treated with fungi (Rhizopus oryzae) on reproductive steroids and liver CYP1A of exposed goldfish (Carassius auratus) - Diniz, M.S.; Peres, I.; Castro, L.; Freitas, A.C.; Rocha-Santos, T.A.P.; Costa, P.M.; Pereira, R.; Duarte, A.C. (Ecotoxicology, 2009)
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cited By (since 1996)3

Electrical, structural and optical properties of fluorine-doped zinc oxide thin films: Effect of the solution aging time - Rozati, S.M.a , Moradi, S.a , Golshahi, S.a , Martins, R.b , Fortunato, E.b (Thin Solid Films, 2009)
In this paper ageing effects of the solution used to prepare fluorine-doped ZnO films by the spray pyrolysis technique were investigated, concerning its role on the structure, the electrical and optical properties of films produced. The data reveal that the sheet resistance of the ZnO:F thin film decreases with the age of the solution used, reaching a minimum of 24 Ω/□, after 15 days. On the other hand the optical transmittance increases for films deposited using 6 days aging solution, decreasing afterwards as the aging time increases, being the optical transmittance in the visible range below 55%, for films deposited from solutions 36 days in age. The X-ray diffraction spectra show that the aged films are polycrystalline in nature with a [100] predominant orientation. The data also show that the intensity of (100) peak increases as the time of solution age increases, which is related to an improvement of the film crystallinity. © 2009 Elsevier B.V. All rights reserved.
cited By 27

Isolation and characterization of a new Cu-Fe protein from Desulfovibrio aminophilus DSM12254 - Rivas, M. G.; Mota, C. S.; Pauleta, S. R.; Carepo, M. S. P.; Folgosa, F; Andrade, S. L. A.; Fauque, G; Pereira, AS; Tavares, P.; Calvete, JJ; Moura, I; Moura, JJG (Journal of Inorganic Biochemistry, 2009)
The isolation and characterization of a new metalloprotein containing Cu and Fe atoms is reported. The as-isolated Cu-Fe protein shows an UV-visible spectrum with absorption bands at 320 nm, 409 nm and 615 nm. Molecular mass of the native protein along with denaturating electrophoresis and mass spectrometry data show that this protein is a multimer consisting of 14 +/- 1 subunits of 15254.3 +/- 7.6 Da. Mossbauer spectroscopy data of the as-isolated Cu-Fe protein is consistent with the presence of [2Fe-2S](2+) centers. Data interpretation of the dithionite reduced protein suggest that the metallic cluster could be constituted by two ferromagnetically coupled [2Fe-2S](+) spin delocalized pairs. The biochemical properties of the Cu-Fe protein are similar to the recently reported molybdenum resistance associated protein from Desulfovibrio, D. alaskensis. Further-more, a BLAST search from the DNA deduced amino acid sequence shows that the Cu-Fe protein has homology with proteins annotated as zinc resistance associated proteins from Desulfovibrio, D. alaskensis, D. vulgaris Hildenborough, D. piger ATCC 29098. These facts suggest a possible role of the Cu-Fe protein in metal tolerance. (C) 2009 Published by Elsevier Inc.
Times Cited: 1 Rivas, Maria G. Mota, Cristiano S. Pauleta, Sofia R. Carepo, Marta S. P. Folgosa, Filipe Andrade, Susana L. A. Fauque, Guy Pereira, Alice S. Tavares, Pedro Calvete, Juan J. Moura, Isabel Moura, Jose J. G. 1st Latin American Meeting on Biological Inorganic Chemistry (LABIC2008) AUG 31-SEP 04, 2008 Iguazu Falls, BRAZIL SI

Kinetic, structural, and EPR studies reveal that aldehyde oxidoreductase from Desulfovibrio gigas does not need a sulfido ligand for catalysis and give evidence for a direct Mo-C interaction in a biological system - Santos-Silva, T; Ferroni, F.; Thapper, A.; Marangon, J.; González, P.J.; Rizzi, A. C.; Moura, I; Moura, JJG; Romão, MJ; Brondino, CD (Journal of the American Chemical Society, 2009)
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LNA, oscillator and mixer co-design for compact RF-CMOS ISM receivers - J. Ferreira; Bastos, I.; Oliveira, L.; Oliveira, JP; Michalak, T.; Pankiewicz, P.; Nowacki, B.; Makosa, P.; Rybarczyk, A. (Mixed Design of Integrated Circuits & Systems, 2009. MIXDES'09. MIXDES-16th International Conference, 2009)
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LNA, Oscillator and Mixer Co-Design Strategy Approach for RF-CMOS - Oliveira, JP; Oliveira, L.B.; J. Ferreira; Bastos, I.; Michalak, T.; Pankiewicz, P.; Nowacki, B.; Makosa, P.; Rybarczyk, A. (Electronics and Telecommunications Quartely, 2009)
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Molybdenum Induces the Expression of a Protein Containing a New Heterometallic Mo-Fe Cluster in Desulfovibrio alaskensis - Rivas, M. G.; Carepo, M. S. P.; Mota, C. S.; Korbas, M.; Durand, M. C.; Lopes, A. T.; Brondino, CD; Pereira, AS; George, GN; Dolla, A.; Moura, JJG; Moura, I (Biochemistry, 2009)
The characterization of a novel Mo-Fe protein (MorP) associated with a system that responds to Mo in Desulfovibrio alaskensis is reported. Biochemical characterization shows that MorP is a periplasmic homomultimer of high molecular weight (260 +/- 13 kDa) consisting of 16-18 monomers of 15321.1 +/- 0.5 Da. The UV/visible absorption spectrum of the as-isolated protein shows absorption peaks around 280, 320, and 570 nm with extinction coefficients of 18700, 12800, and 5000 M(-1) cm(-1), respectively. Metal content, EXAFS data and DFT calculations support the presence of a Mo-2S-[2Fe-2S]-2S-Mo cluster never reported before. Analysis of the available genomes from Desulfovibrio species shows that the MorP encoding gene is located downstream of a sensor and a regulator gene. This type of gene arrangement, called two component system, is used by the cell to regulate diverse physiological processes in response to changes in environmemtal conditions. Increase of both gene expression and protein production was observed when cells were cultured in the presence of 45 mu M molybdenum. Involvement of this system in Mo tolerance of sulfate reducing bacteria is proposed.
Times Cited: 8 Rivas, Maria G. Carepo, Marta S. P. Mota, Cristiano S. Korbas, Malgorzata Durand, Marie-Claire Lopes, Ana T. Brondino, Carlos D. Pereira, Alice S. George, Graham N. Dolla, Alain Moura, Jose J. G. Moura, Isabel

Nanostructured silicon and its application to solar cells, position sensors and thin film transistors - Martins, R.; Raniero, Leandro; Pereira, Luis; Costa†, Daniel; Aguas, Hugo; Pereira, Sonia; Silva, Leonardo; A Gonçalves; Ferreira, I.; Fortunato, E. (Philosophical Magazine, 2009)
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Nanostructured silicon and its application to solar cells, position sensors and thin film transistors - Martins, R.; Raniero, Leandro; Pereira, Luis; Costa, Daniel; Aguas, Hugo; Pereira, Sonia; Silva, Leonardo; A Gonçalves; Ferreira, I.; Fortunato, E. (Philosophical Magazine, 2009)
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A New Open-Loop Control Method for Stepping Motor Driving - P. Sousa; Stanimir Valtchev; Mário Neves; A. Rodrigues (2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 2009)

A new open-loop control method for stepping motor driving - P. Sousa; S Valtchev; M V Neves; A L Rodrigues (POWERENG 2009 - 2nd International Conference on Power Engineering, Energy and Electrical Drives Proceedings, 2009)
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Outstanding Paper Award: LNA, Oscillator, and Mixer, Co-Design for Compact RF-CMOS ISM Receivers - J. Ferreira; Bastos, I.; Oliveira, L.B.; Oliveira, JP; Michalak, T.; Pankiewicz, P.; Makosa, P.; Nowacki, B.; Rybarczyk, A. (2009)
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Paper Field Effect Transistor - Fortunato, E.; Correia, Nuno; Barquinha, Pedro; Costa, Claudia; Pereira, Luis; Goncalves, Goncalo; Martins, Rodrigo (Zinc Oxide Materials and Devices Iv, 2009)
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Times Cited: 0Conference on Zinc Oxide Materials and Devices IVJan 25-28, 2009San Jose, CASpie

Polymeric Film Sensors based on PAH-PAZO Ionic Self-assembled Multi-nanolayers. - Ribeiro, Celso; Gomes, Paulo J; Ribeiro, Paulo A; Raposo, Maria; Águas, Hugo; dos Santos, Pedro Mendonça; Beatriz Borges; Brogueira, Pedro (BIODEVICES, 2009)
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Preliminary structural characterization of human SOUL, a haem-binding protein - Freire, Filipe; Romao, Maria Joao; Macedo, Anjos L; Aveiro, Susana S.; Goodfellow, Brian J.; Carvalho, Ana Luisa (Acta Crystallographica Section F-Structural Biology and Crystallization Communications, 2009)
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Proteomic evaluation of wound-healing processes in potato (Solanum tuberosum L.) tuber tissue - Chaves, I; Pinheiro, C.; Paiva, JAP; Planchon, S; Sergeant, K; Renaut, J; Graca, JA; Costa, G.; Coelho, AV; Ricardo, CPP (PROTEOMICS, 2009)
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Proteomic evaluation of wound-healing processes in potato (Solanum tuberosum L.) tuber tissue - Chaves, I; Pinheiro, C.; Paiva, JAP; Planchon, S; Sergeant, K; Renaut, J; Graca, JA; Costa, G.; Coelho, AV; Ricardo, CPP (PROTEOMICS, 2009)
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Real-Time Monitoring of Molecular Dynamics of Ethylene Glycol Dimethacrylate Glass Former - Viciosa, M. T.; N. T. Correia; Salmeron Sanchez, M.; Carvalho, AL; Romao, MJ; Gomez Ribelles, J. L.; Dionisio, M. (Journal of Physical Chemistry B, 2009)
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Reducing the Number of Membership Functions in Linguistic Variables - Gomes, Margarida M; Rita A. Ribeiro; Amaral, Paula (Livro de actas do 14º Congresso da Associação Portuguesa de Investigação Operacional, IO 2009, 7-9 September 2009, 2009)
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Ring-functionalized molybdenocene complexes - Honzí?ek, J.; Mukhopadhyay, A.; Santos-Silva, T; Romão, MJ; Romão, C.C. (Organometallics, 2009)
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Solving huge size instances of the optimal diversity management problem - Agra, A.; Cardoso, D.M.; Cerdeira, J.O.; Miranda, M.; Rocha, E. (Journal of Mathematical Sciences, 2009)
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Synthesis and characterization of Co and Ni complexes stabilized by keto- and acetamide-derived P,O-type phosphine ligands - Agostinho, M.; Rosa, V.; Aviles, T.; Welter, R.; Braunstein, P. (Dalton Transactions, 2009)
The coordination properties of the beta-keto phosphine ligands R(2)PCH(2)C(O)Ph (HL(1), R = i-Pr; HL(2), R = Ph), of the new acetamide-derived phosphine ligand (i-Pr)(2)PNHC(O) Me (HL(3)) and of Ph(2)PNHC(O) Me (HL(4)) have been examined towards Ni(II) complexes. Comparisons are made between systems in which the PCH(2) function of the ketophosphine has been replaced with an isoelectronic PNH group in amide-derived ligands, or the PCH functionality of phosphinoenolates with a PN group in phosphinoiminolate complexes. Furthermore, ligands HL(2) and HL(4) reacted with [(eta(5)-C(5)H(5))CoI(2)(CO)] to afford the phosphine mono-adducts [(eta(5)-C(5)H(5))CoI(2){Ph(2)PCH(2)C(O)Ph}] (1) and [(eta(5)-C(5)H(5))CoI(2){Ph(2)PNHC(O)Me}] (3), respectively, which upon reaction with excess NEt(3) yielded the phosphinoenolate complex [(eta(5)-C(5)H(5))CoI{Ph(2)PCH (center dot center dot center dot) under barC((center dot center dot center dot) under barO)Ph}] (2) and the phosphinoiminolate complex [(eta(5)-C(5)H(5))CoI{Ph(2)PN (center dot center dot center dot) under barC((center dot center dot center dot) under barO)Me}] (4), respectively. The complexes cis-[Ni{(i-Pr)(2)PN (center dot center dot center dot) under barC((center dot center dot center dot) under barO)Me}(2)] (6) and cis-[Ni{Ph(2)PN (center dot center dot center dot) under barC((center dot center dot center dot) under barO)Me}(2)] (7) were obtained similarly from NiCl(2) and HL(3) and HL(4), respectively, in the presence of a base. The phosphinoenolate complex [Ni{(i-Pr)(2)PCH (center dot center dot center dot) under barC((center dot center dot center dot) under barO) Ph}(2)] (5) exists in ethanol as a mixture of the cis and trans isomers, in contrast to cis-[Ni{(Ph(2)PCH (center dot center dot center dot) under barC((center dot center dot center dot) under barO)Ph}(2)], and the solid-state structure of the trans isomer of 5 was established by X-ray diffraction. The structures of the ligand HL3 and of the complexes 1, 3 in 3 center dot 3/2CH(2)Cl(2), 4, 6 and 7 have also been determined by X-ray diffraction and are compared with those of related complexes. Complexes 4, 6 and 7 contain a five-membered heteroatomic metallocyclic moiety, which is constituted by five different chemical elements. The structural consequences of the steric bulk of the P substituents and of the electronic characteristics of the P, O chelates are discussed.
395VATimes Cited:2Cited References Count:37
Keywords: coordination chemistry; crystal-structures; ethylene homopolymerization; functional phosphines; nickel-complexes; oligomerization; palladium(ii) complexes; polymerization; reactivity; x = cl

Understanding the behavior of transactional memory applications - Lourenço, João; Ricardo Dias; Lu\'ıs, João; Rebelo, Miguel; Pessanha, Vasco (Proceedings of the 7th Workshop on Parallel and Distributed Systems: Testing, Analysis, and Debugging, 2009)
Transactional memory is a new trend in concurrency control that was boosted by the advent of multi-core processors and the near to come many-core processors. It promises the performance of finer grain with the simplicity of coarse grain threading. However, there is a clear absence of software development tools oriented to the transactional memory programming model, which is confirmed by the very small number of related scientific works published until now. This paper describes ongoing work. We propose a very low overhead monitoring framework, developed specifically for monitoring TM computations, that collects the transactional events into a single log file, sorted in a global order. This framework is then used by a visualization tool to display different types of charts from two categories: statistical charts and thread-time space diagrams. These last diagrams are interactive, allowing to identify conflicting transactions. We use the visualization tool to analyse the behavior of two different, but similar, testing applications, illustrating how it can be used to better understand the behavior of these transactional memory applications.
Keywords: concurrency; debugging; monitoring; profiling; software transactional memory; testing; visualization

Zinc oxide and related compounds: order within the disorder - Martins, R.; Pereira, L.; Barquinha, P.; Ferreira, I.; Prabakaran, R.; GONCALVES, G; Goncalves, A.; Fortunato, E. (Zinc Oxide Materials and Devices Iv, 2009)
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Times Cited: 0Conference on Zinc Oxide Materials and Devices IVJan 25-28, 2009San Jose, CASpie

Zinc Oxide Materials and Devices IV (Proceedings Volume) - Neshataeva, Ekaterina; Kuemmell, Tilmar; Ebbers, André; Bacher, Gerd; Rogers, David J.; Sandana, VE; Teherani, F Hosseini; Razeghi, M; Drouhin, HJ; Martins, R. (2009)
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{Dexamethasone-loaded scaffolds prepared by supercritical-assisted phase inversion} - Duarte, Ana Rita C; João F. Mano; Reis, Rui L (Acta Biomaterialia, 2009)
The aim of this study was to evaluate the possibility of preparing dexamethasone-loaded starch-based porous matrices in a one-step process. Supercritical phase inversion technique was used to prepare composite scaffolds of dexamethasone and a polymeric blend of starch and poly(l-lactic acid) (SPLA) for tissue engineering purposes. Dexamethasone is used in osteogenic media to direct the differentiation of stem cells towards the osteogenic lineage. Samples with different drug concentrations (5-15 wt.{%} polymer) were prepared at 200 bar and 55 °C. The presence of dexamethasone did not affect the porosity or interconnectivity of the polymeric matrices. Water uptake and degradation studies were also performed on SPLA scaffolds. We conclude that SPLA matrices prepared by supercritical phase inversion have a swelling degree of nearly 90{%} and the material presents a weight loss of ∼25{%} after 21 days in solution. Furthermore, in vitro drug release studies were carried out and the results show that a sustained release of dexamethasone was achieved over 21 days. The fitting of the power law to the experimental data demonstrated that drug release is governed by an anomalous transport, i.e., both the drug diffusion and the swelling of the matrix influence the release of dexamethasone out of the scaffold. The kinetic constant was also determined. This study reports the feasibility of using supercritical fluid technology to process in one step a porous matrix loaded with a pharmaceutical agent for tissue engineering purposes. © 2009 Acta Materialia Inc.
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Keywords: Drug delivery; Phase inversion; PLLA; Supercritical fluids; tissue engineering

{Isolation and characterization of a new Cu-Fe protein from Desulfovibrio aminophilus DSM12254.} - Rivas, Maria G; Mota, Cristiano S; Pauleta, Sofia R; Carepo, Marta S P; Folgosa, Filipe; Andrade, Susana L A; Fauque, Guy; Pereira, Alice S.; Tavares, Pedro; Calvete, Juan J.; Moura, Isabel; Moura, Jose J. G. (Journal Of Inorganic Biochemistry, 2009)
The isolation and characterization of a new metalloprotein containing Cu and Fe atoms is reported. The as-isolated Cu-Fe protein shows an UV-visible spectrum with absorption bands at 320 nm, 409 nm and 615 nm. Molecular mass of the native protein along with denaturating electrophoresis and mass spectrometry data show that this protein is a multimer consisting of 14+/-1 subunits of 15254.3+/-7.6 Da. Mössbauer spectroscopy data of the as-isolated Cu-Fe protein is consistent with the presence of [2Fe-2S](2+) centers. Data interpretation of the dithionite reduced protein suggest that the metallic cluster could be constituted by two ferromagnetically coupled [2Fe-2S](+) spin delocalized pairs. The biochemical properties of the Cu-Fe protein are similar to the recently reported molybdenum resistance associated protein from Desulfovibrio, D. alaskensis. Furthermore, a BLAST search from the DNA deduced amino acid sequence shows that the Cu-Fe protein has homology with proteins annotated as zinc resistance associated proteins from Desulfovibrio, D. alaskensis, D. vulgaris Hildenborough, D. piger ATCC 29098. These facts suggest a possible role of the Cu-Fe protein in metal tolerance.

{Perspectives on: Supercritical fluid technology for 3d tissue engineering scaffold applications} - Duarte, Ana Rita C; Mano, Joo F.; Reis, Rui L (Journal of Bioactive and Compatible Polymers, 2009)
Supercritical fluid technology has proven to be useful for many pharmaceutical applications and is now emerging as an alternative to conventional processes for the preparation of 3D structures and injectable particles suitable to be used in regenerative medicine. A current overview of the basic principles underlying supercritical fluid technology, the state of the art and future potential of this technology are presented.
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Keywords: Drug delivery; Foaming; Impregnation; Phase inversion; Polymer; Scaffolds; Sterilization.; Supercritical fluids; tissue engineering

{Preparation of chitosan scaffolds loaded with dexamethasone for tissue engineering applications using supercritical fluid technology} - Duarte, Ana Rita C; João F. Mano; Reis, Rui L (European Polymer Journal, 2009)
Supercritical fluid impregnation was tested to prepare a new scaffold loaded with a bioactive compound. Dexamethasone is used in osteogenic media to direct the differentiation of stem cells towards the osteogenic lineage. Dexamethasone was impregnated in chitosan scaffolds at different operating conditions, in order to optimize the impregnation process. Pressure and temperature affect the carbon dioxide density and influence the swelling of the polymer and the drug solubility in the fluid phase, therefore these are two important parameters that were studied in this work. Chitosan sponges prepared by freeze drying were impregnated with the active compound at pressures from 8.0 up to 14.0 MPa and temperatures from 35 up to 55 °C. The effect of the impregnation contact time (3 h and 6 h) was also evaluated. From the experiments performed we can conclude that the yield of impregnation is lower when increasing pressure and temperature. The contact time will mainly influence the amount of drug impregnated in the scaffold and for higher contact times the impregnation yield is also higher. Scanning electron microscopy shows particles of dexamethasone in the bulk of the scaffold, which confirms the feasibility of the supercritical fluid impregnation technology for the preparation of delivery devices. The loading capacity of the scaffolds was determined by spectroscopic analysis and the highest loading was achieved for the experiments performed at 8.0 MPa and 35 °C. Furthermore, in vitro drug release studies were carried out and the results show that dexamethasone was sustainably released. Supercritical fluid impregnation proved to be feasible for the preparation of a drug delivery system for bone tissue engineering purposes. © 2008 Elsevier Ltd. All rights reserved.
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Keywords: chitosan; Dexamethasone; Drug delivery; Impregnation; Scaffolds; Supercritical fluids

{Preparation of starch-based scaffolds for tissue engineering by supercritical immersion precipitation} - Duarte, Ana Rita C; João F. Mano; Reis, Rui L (Journal of Supercritical Fluids, 2009)
The aim of this study was to evaluate the possibility of preparing starch-based porous matrixes using supercritical fluid technology. Supercritical immersion precipitation technique was used to prepare scaffolds of a polymeric blend of starch and poly(l-lactic acid) for tissue engineering purposes.Immersion precipitation experiments were carried out at different operational conditions and highly porous and interconnected scaffolds were obtained. Two organic solvents, dichloromethane and chloroform were tested, and from the results obtained chloroform was the more favourable for the process. The effect of polymer solution concentration (5 up to 20 wt{%}), temperature (35 up to 55 °C) and pressure (100 up to 200 bar) in the SPLA (50:50 wt{%}) membrane morphology, porosity and interconnectivity was evaluated. All the conditions tested were in the region of total miscibility between the organic solvent and carbon dioxide. Additionally, a blend with a different starch-poly(l-lactic acid) ratio (30:70 wt{%}) was tested. Bicontinuous structures were formed indicating that the L-L demixing process that governs the phase inversion is the spinodal decomposition. © 2008 Elsevier B.V. All rights reserved.
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Keywords: Immersion precipitation; natural polymers; Phase inversion; PLLA; Scaffolds; Supercritical fluids; tissue engineering

{Processing of novel bioactive polymeric matrixes for tissue engineering using supercritical fluid technology} - Duarte, Ana Rita C; Caridade, Sofia G.; Mano, Jo??o F.; Reis, Rui L (Materials Science and Engineering C, 2009)
The aim of this study was to develop a new process for the production of bioactive 3D scaffolds using a clean and environmentally friendly technology. The possibility of preparing composite scaffolds of Bioglass?? and a polymeric blend of starch and poly(l-lactic acid) (SPLA50) was evaluated. Supercritical phase-inversion technique was used to prepare inorganic particles loaded starch-based porous composite matrixes in a one-step process for bone tissue engineering purposes. Due to their osteoconductive properties some glasses and ceramics are interesting materials to be used for bone tissue engineering purposes; however their poor mechanical properties create the need of a polymeric support where the inorganic fraction can be dispersed. Samples impregnated with different concentrations of Bioglass?? (10 and 15{%} wt/wt polymer) were prepared at 200??bar and 55????C. The presence of Bioglass?? did not affect the porosity or interconnectivity of the polymeric matrixes. Dynamic mechanical analysis has proven that the modulus of the SPLA50 scaffolds increases when glass particles are impregnated within the matrix. In vitro bioactivity studies were carried out using simulated body fluid and the results show that a calcium-phosphate layer started to be formed after only 1??day of immersion. Chemical analysis of the apatite layer formed on the surface of the scaffold was performed by different techniques, namely EDS and FTIR spectroscopy and X-ray diffraction (XRD). The ion concentration in the simulated body fluid was also carried out by ICP analysis. Results suggest that a bone-like apatite layer was formed. This study reports the feasibility of using supercritical fluid technology to process, in one step, a porous matrix loaded with a bioactive material for tissue engineering purposes. ?? 2009 Elsevier B.V. All rights reserved.
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Keywords: Bioglass??; natural polymers; Phase inversion; PLLA; Supercritical fluids; tissue engineering

{Production and characterization of thin 7 Li targets fabricated by ion implantation} - Cruz, J.; Fonseca, M; Luis, H; R. Mateus; Marques, H; Jesus, A P; Ribeiro, J P; O. M. N. D. Teodoro; Rolfs, C (Nuclear Inst. and Methods in Physics Research, B, 2009)
Very high fluence implantation of 7Li+ ions was used to promote the formation of a thin and high density 7Li target in the surface region of Al samples. The implanted volume was characterized by particle induced gamma-ray emission, Rutherford backscattering spectrometry, X-ray photoelectron spectros- copy and nuclear reaction analysis, revealing that the implanted surface is a combination of Li2CO3, metallic lithium, LiOH and C, with almost no Al present. Radiation damage effects by proton beams were studied by observing the evolution of the 7Li(p,a)4He nuclear reaction yield with the accumulated charge, at different proton energies, revealing high stability of the produced Li target.
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{Room-Temperature Cosputtered HfO[sub 2]–Al[sub 2]O[sub 3] Multicomponent Gate Dielectrics} - Pei, Z. L.; Pereira, L.; Gonçalves, G.; Barquinha, P.; N. Franco; E. Alves; Rego, A. M. B.; Martins, R.; Fortunato, E. (Electrochemical and Solid-State Letters, 2009)
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{Supercritical fluids in biomedical and tissue engineering applications: a review} - Duarte, A.R.C.; Mano, J.F.; Reis, R.L. (International Materials Reviews, 2009)
Over the past several years, the definition of a scaffold for tissue engineering has changed dramatically, from a material that acts only as an inert structural support for cell attachment to serving as a more complex and dynamic environment for tissue development. This paper is a review on the existing and on the new emerging techniques based on supercritical fluid technology for the preparation of scaffolds and particles for tissue engineering applications. Supercritical fluid technology has already proven to be feasible for many pharmaceutical applications and is now emerging as an alternative to conventional materials' processing methods for the preparation of three-dimensional structures and injectable particles suitable to be used in regenerative medicine. The basic principles underlying each technique are here presented as well as the advantages and disadvantages of each process. The state of the art is reviewed and the major conclusions of the studies reported in the literature are discussed.
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Effect of annealing on the properties of N-doped ZnO films deposited by RF magnetron sputtering - Wang, Jinzhong; Elamurugu, Elangovan; Sallet, Vincent; Jomard, Francois; Lusson, Alain; Ana M. Botelho do Rego; Barquinha, Pedro; Goncalves, Goncalo; Martins, Rodrigo; Fortunato, Elvira (Applied Surface Science, 2008)
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Times Cited: 16

Molecular determinants of ligand specificity in family 11 carbohydrate binding modules - an NMR, X-ray crystallography and computational chemistry approach - Viegas, Aldino; Bras, Natercia F.; Cerqueira, Nuno M. F. S. A.; Fernandes, Pedro Alexandrino; Prates, Jose A. M.; Fontes, Carlos M. G. A.; Bruix, Marta; Romao, Maria Joao; Carvalho, Ana Luisa; Ramos, Maria Joao; Macedo, Anjos L; Cabrita, Eurico J. (Febs Journal, 2008)
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Study of graded Ni-Ti shape memory alloy film growth on Si(100) substrate - Martins, R. M. S.; Schell, N.; Muecklich, A.; Reuther, H.; Beckers, M.; Silva, R.J.C.; Pereira, L.; Fernandes, F.M. Braz (Applied Physics a-Materials Science & Processing, 2008)
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High mobility indium free amorphous oxide thin film transistors - Fortunato, Elvira M. C.; Pereira, Lus M. N.; Barquinha, Pedro M. C.; Ana M. Botelho do Rego; Goncalves, Goncalo; Vila, Anna; Morante, Juan R.; Martins, Rodrigo F. P. (Applied Physics Letters, 2008)
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Times Cited: 128

Benefits of membrane electrodes in the electrochemistry of metalloproteins: mediated catalysis of Paracoccus pantotrophus cytochrome c peroxidase by horse cytochrome c: a case study - de Sousa, P. M. P.; Pauleta, S. R.; Rodrigues, D.; Goncalves, M. L. S.; Pettigrew, G. W.; Moura, I; Moura, JJG; dos Santos, M. M. C. (Journal of Biological Inorganic Chemistry, 2008)
A comparative study of direct and mediated electrochemistry of metalloproteins in bulk and membrane-entrapped solutions is presented. This work reports the first electrochemical study of the electron transfer between a bacterial cytochrome c peroxidase and horse heart cytochrome c. The mediated catalysis of the peroxidase was analysed both using the membrane electrode configuration and with all proteins in solution. An apparent Michaelis constant of 66 +/- 4 and 42 +/- 5 mu M was determined at pH 7.0 and 0 M NaCl for membrane and bulk solutions, respectively. The data revealed that maximum activity occurs at 50 mM NaCl, pH 7.0, with intermolecular rate constants of (4.4 +/- 0.5) x 10(6) and (1.0 +/- 0.5) x 10(6) M(-1) s(-1) for membrane-entrapped and bulk solutions, respectively. The influence of parameters such as pH or ionic strength on the mediated catalytic activity was analysed using this approach, drawing attention to the fact that careful analysis of the results is needed to ensure that no artefacts are introduced by the use of the membrane configuration and/or promoters, and therefore the dependence truly reflects the influence of these parameters on the (mediated) catalysis. From the pH dependence, a pK of 7.5 was estimated for the mediated enzymatic catalysis.
Times Cited: 1 de Sousa, P. M. Paes Pauleta, S. R. Rodrigues, D. Goncalves, M. L. Simoes Pettigrew, G. W. Moura, I. Moura, J. J. G. dos Santos, M. M. Correia

The determination of the metal-dielectric interface barrier height from the open-circuit isothermal charging current - Neagu ER; Neagu RM; Dias CJ; Lanca MC; Marat-Mendes JN (Journal of Applied Physics, 2008)
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Elastic Behaviour of Spherical Particles Reinforced Metal-Matrix Composites - Botas JD; Velhinho A; Silva RJC (Advanced Materials Forum Iv, 2008)
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An Enterprise Interoperability Value Proposition Framework - Grilo; Antonio; Li Man-Sze; Crave Servane; van den Berg Roland (2008)
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Microstructure Characterization of Aluminium Syntactic Functionally Graded Composites Containing Hollow Ceramic Microspheres Manufactured by Radial Centrifugal Casting - Ferreira; SC; Velhinho; A; Rocha; LA; Fernandes; FMB (2008)
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New Experimental Facts Concerning the Thermally Stimulated Discharge Current in Dielectric Materials - Neagu RM; Neagu ER; Lanca MC; Marat-Mendes JN (Advanced Materials Forum Iv, 2008)
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A New Value Proposition of Interoperability for Enterprises to Advance the Frontiers of the European Knowledge Economy - Li Man-Se; Crave Servane; Grilo Antonio; van den Berg Roland (2008)
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Study of novel nanofiber mats obtained by electrospinning ternary blends containing chitosan, cellulose acetate and poly(ethylene oxide) - Vidinha R; Henriques C; Borges JP; Silva JC (Tissue Engineering Part A, 2008)
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Crystallization of amorphous indium zinc oxide thin films produced by radio-frequency magnetron sputtering - GONCALVES, G; Barquinha, P.; Raniero, L.; Martins, R.; Fortunato, E. (Thin Solid Films, 2008)
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Times Cited: 29Symposium on Advances in Transparents Electronics held at the European-Materials-Research-Society MeetingMay 29-jun 01, 2006Nice, FRANCEEuropean Mat Res Soc

Synthesis, characterisation and solid state structures of alpha-diimine cobalt(II) complexes: Ethylene polymerisation tests - Rosa, V.; Carabineiro, S. A.; Aviles, T.; Gomes, P. T.; Welter, R.; Campos, J. M.; Ribeiro, M. R. (Journal of Organometallic Chemistry, 2008)
A series of cobalt(II) compounds of the type [CoX2(alpha-diimine)] were synthesised by direct reaction of anhydrous CoCl2 or CoI2 and the corresponding alpha-diimine ligand, in CH2Cl2: [CoI2(o,o',p-Me3C6H2-DAB)] ( 1), [ CoI2(o,o'-(Pr2C6H3)-Pr-i-DAB)] ( 2), ( where Ar-DAB = 1,4-bis(aryl)-2,3-dimethyl-1,4-diaza-1,3-butadiene), and [CoCl2(o,o',p-Me3C6H2- BIAN)] (3), [CoCl2(o,o'- (Pr2C6H3)-Pr-i-BIAN)] (4), and [CoI2(o,o'-(Pr2C6H3)-Pr-i-BIAN)] (5) (where Ar-BIAN = bis(aryl) acenaphthenequinonediimine). All compounds were characterised by elemental analyses, IR, mass spectrometry, and X-ray diffraction whenever possible. The crystal structures of compounds 2-4 showed, in all cases, distorted tetrahedral geometries about the Co, built by two halogen atoms and two nitrogen atoms of the alpha-diimine ligand. Compounds 3 and 4, as well as [ CoCl2(o,o',p-Me3C6H2-DAB)] (1a), and [ CoCl2( o,o'- (Pr2C6H3)-Pr-i- DAB)] (2a), were activated by methylaluminoxane (MAO) and tested as catalysts for ethylene polymerisation, showing low catalytic activities. Selected polyethylene ( PE) samples were characterised by H-1 and C-13 NMR and FT-IR spectroscopies, and by differential scanning calorimetry (DSC), revealing branching microstructures (2.5-5.5%). (c) 2007 Elsevier B. V. All rights reserved.
280EXTimes Cited:9Cited References Count:32
Keywords: a-diimine ligands; bian ligands; bis(aryl)acenaphthenequinonediimine; catalysts; cobalt(ii) complexes; coordination strength; dft; ethylene; metal; olefins; oligomerization; polymerisation; x-ray diffraction

{Study of graded Ni-Ti shape memory alloy film growth on Si(100) substrate} - Martins, R. M. S.; Schell, N.; Mücklich, A.; Reuther, H.; Beckers, M.; Silva, R.J.C.; Pereira, L.; Braz Fernandes, F.M. (Applied Physics A, 2008)
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Highly stable transparent and conducting gallium-doped zinc oxide thin films for photovoltaic applications - Fortunato, E.; Raniero, L.; Silva, L.; Goncalves, A.; Pimentel, A.; Barquinha, P.; Aguas, H.; Pereira, L.; GONCALVES, G; Ferreira, I.; Elangovan, E.; Martins, R. (Solar Energy Materials and Solar Cells, 2008)
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Times Cited: 87

{Highly stable transparent and conducting gallium-doped zinc oxide thin films for photovoltaic applications} - Fortunato, E.; Raniero, L.; Silva, L.; Goncalves, A.; Pimentel, A.; Barquinha, P.; Aguas, H.; Pereira, L.; GONCALVES, G; Ferreira, I. (Solar Energy Materials and Solar Cells, 2008)
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N2O reduction by activated carbon over iron bimetallic catalysts - Carabineiro, Sonia A.; Fernandes, Francisco B.; Silva, Rui JC; Vital, Joaquim S.; Ana M. Ramos; Fonseca, Isabel M. (Catalysis Today, 2008)
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Ultrasonic energy as a tool in the sample treatment for polymer characterization through matrix-assisted laser desorption ionization time-of-flight mass spectrometry - Fernandes, L.; Rial-Otero, R.; Temtem, M.; Veiga de Macedo, C.; Aguiar-Ricardo, A.; Capelo, J. L. (Talanta, 2008)
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Cited By (since 1996):5Export Date: 19 November 2013Source: Scopus

IN-SITU STUDY OF THE PREFERENTIAL ORIENTATION OF MAGNETRON SPUTTERED Ni-Ti THIN FILMS AS A FUNCTION OF BIAS AND SUBSTRATE TYPE - Rui M. S. Martins; SCHELL, NORBERT; Beckers, Manfred; Muecklich, Arndt; Reuther, Helfried; Silva, Rui JC; Mahesh, Karimbi K.; Fernandes, F.M. Braz; Berg, B; Mitchell, MR; Proft, J (Smst 2006: Proceedings of the International Conference on Shape Memory and Superelastic Technologies, 2008)
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A new bis(1-naphthylimino)acenaphthene compound and its Pd(II) and Zn(II) complexes: Synthesis, characterization, solid-state structures and density functional theory studies on the syn and anti isomers - Rosa, V.; Avilés, T.; Aullon, G.; Covelo, B.; Lodeiro, C. (Inorganic Chemistry, 2008)
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Cited By :34Export Date: 17 June 2020

Synthesis, characterisation and solid state structures of α-diimine cobalt(II) complexes: Ethylene polymerisation tests - Rosa, V.; Carabineiro, S. A.; Avilés, T.; Gomes, P. T.; Welter, R.; Campos, J. M.; Ribeiro, M. R. (Journal of Organometallic Chemistry, 2008)
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Cited By :41Export Date: 17 June 2020

AIRDoc An Approach to Improve Requirements Documents - R. Ramos,; J. Castro; J. Araújo,; A. Moreira; F. Alencar (22th Brazilian Symposium on Software Engineering (SBES), 2008)
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Evolving logic programming based agents with temporal operators - Royval, Alfredo Gabaldon; Leite, João Alexandre Carvalho Pinheiro; Alferes, José Júlio Alves (Web Intelligence, 2008)
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Non-markovian agent evolution with EVOLP - Royval, Alfredo Gabaldon; Leite, João Alexandre Carvalho Pinheiro; Alferes, José Júlio Alves (Dagstuhl Seminar Proceedings, 2008)
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