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2013
Sousa, Ana M. M., João Borges, Fernando Silva, Ana M. Ramos, Eurico J. Cabrita, and Maria Pilar Gonçalves. "Shaping the molecular assemblies of native and alkali- modified agars in dilute and concentrated aqueous media via microwave-assisted extraction." Soft Matter. 9 (2013): 3131-3139. AbstractWebsite

The use of agar-based biomaterials for the development of emerging areas, such as tissue engineering or ‘smart materials’ production has recently gained great interest. Understanding how these gel-forming polysaccharides self-organise in aqueous media and how these associations can be tuned to meet the specific needs of each application is thus of great relevance. As an extension of previous pioneering research concerning the application of the microwave-assisted extraction (MAE) technique in the recovery of native (NA) and alkali-modified (AA) agars, this article focuses on the different molecular assemblies assumed by these novel NA and AA when using different MAE routes. The molecular architectures in dilute (5, 10, 50 and 100 mg mL1) and concentrated (1.5% (w/w)) aqueous media were imaged by AFM and cryoSEM, respectively. Relevant structural and physicochemical properties were investigated to support the microscopic data. Different extraction routes led to polysaccharides with unique properties, which in turn resulted in different molecular assemblies. Even at 5 mg mL1, AFM images included individual fibers, cyclic segments, aggregates and local networks. At higher polymer concentrations, the structures further aggregated forming multilayer polymeric networks for AA. The more compact and denser 3D networks of AA, imaged by cryoSEM, and their higher resistance to large deformations matched the 2D-shapes observed by AFM. Depending on the nature of the AA chains, homogeneous or heterogeneous growth of assemblies was seen during network formation. The obtained results support well the view of double helix formation followed by intensive double helix association proposed for agar gelation.

Nowacki, B., N. Paulino, and J. Goes A Simple 1 GHz Non-Overlapping Two-Phase Clock Generators for SC Circuits. 20th Int. Conf. Mixed Design of Integrated Circuits and Systems (MIXDES'2013). Gdynia, Poland: IEEE, 2013.
Tschopp, E., and O. Mateus. "The skull and neck of a new flagellicaudatan sauropod from the Morrison Formation and its implication for the evolution and ontogeny of diplodocid dinosaurs." Journal of Systematic Palaeontology. 11.7 (2013): 853-888. Abstracttschopp__mateus_2013_the_skull_and_neck_of_a_new_flagellicaudatan_sauropod_from_the_morrison.pdfWebsite

A new taxon of diplodocid sauropod, Kaatedocus siberi gen. et sp. nov., is recognized based on well-preserved cervical vertebrae and skull from the Morrison Formation (Kimmeridgian, Late Jurassic) of northern Wyoming, USA. A phylogenetic analysis places it inside Diplodocinae (Sauropoda: Flagellicaudata: Diplodocidae), as a sister taxon to a clade uniting Tornieria africana and the classical diplodocines Barosaurus lentus and Diplodocus. The taxon is diagnosed by a unique combination of plesiomorphic and derived traits, as well as the following unambiguous autapomorphies within Diplodocidae: frontals separated anteriorly by a U-shaped notch; squamosals restricted to the post-orbital region; presence of a postparietal foramen; a narrow, sharp and distinct sagittal nuchal crest; the paired basal tuber with a straight anterior edge in ventral view; anterior end of the prezygapophyses of mid- and posterior cervical vertebrae is often an anterior extension of the pre-epipophysis, which projects considerably anterior to the articular facet; anterodorsal corner of the lateral side of the posterior cervical vertebrae marked by a rugose tuberosity; posterior margin of the prezygapophyseal articular facet of posterior cervical vertebrae bordered posteriorly by conspicuous transverse sulcus; posterior cervical neural spines parallel to converging. The inclusion of K. siberi and several newly described characters into a previously published phylogenetic analysis recovers the new taxon as basal diplodocine, which concurs well with the low stratigraphical position of the holotype specimen. Dinheirosaurus and Supersaurus now represent the sister clade to Apatosaurus and Diplodocinae and therefore the most basal diplodocid genera. The geographical location in the less known northern parts of the Morrison Fm., where K. siberi was found, corroborates previous hypotheses on faunal provinces within the formation. The probable subadult ontogenetic stage of the holotype specimen allows analysis of ontogenetic changes and their influence on diplodocid phylogeny.

Moreira Felismina TC, Sharma Sanjiv, Dutra Rosa AF Noronha João PC Cass Anthony EG Sales Goreti M. F. "Smart Plastic Antibody Material (SPAM) tailored on disposable screen printed electrodes for protein recognition: application to Myoglobin detection." Biosensors and Bioelectronics. 42 (2013): 76.
Soares, João, João M. Lourenço, and Nuno Preguiça. "Software Component Replication for Improved Fault-Tolerance: Can Multicore Processors Make It Work?" Dependable Computing. Eds. Marco Vieira, and JoãoCarlos Cunha. Vol. 7869. Lecture Notes in Computer Science, 7869. Springer Berlin Heidelberg, 2013. 173-180. Abstractewdc2013.pdf

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Poggi, F., and M. P. Amado Solar Energy: factor during the planning process of the city. 2º CIHEL 2013 . Lisboa, PT: LNEC, ISBN: 978-178-032-381-7, 2013.
Amado, M. P., and F. Poggi Solar urban planning to the EU 20-20-20 targets. SB13 PORTUGAL. Guimaraes: ISSBE, Universidade Minho, ISBN: 978-178-032-381-7, 2013.
Viegas, Aldino, João Sardinha, Daniel F. Duarte, Ana Luisa Carvalho, Carlos M. G. A. Fontes, Maria Joao Romao, Anjos L. Macedo, and Eurico J. Cabrita. "Solution Structure, Dynamics and Binding Studies of a Family 11 Carbohydrate-Binding Module from Clostridium thermocellum (CtCBM11)." Biochemical Journal. 451 (2013): 289-300. AbstractWebsite

Non-catalytic cellulosomal carbohydrate-binding modules (CBMs) are responsible for increasing the catalytic efficiency of cellulosic enzymes by selectively putting the substrate (a wide range of poly- and oligosaccharides) and enzyme into close contact. In the present work we carried out an atomistic rationalization of the molecular determinants of ligand specificity of a family 11 CBM from thermophilic C. thermocellum (CtCBM11), based on a NMR and molecular modeling approach. We have determined the NMR solution structure of CtCBM11 at 25 and 50 ºC and derived information on the residues of the protein involved in ligand recognition and on the influence of the length of the saccharide chain on binding. We obtained models of the CtCBM11/cellohexaose and CtCBM11/cellotetraose complexes by docking in accordance with the NMR experimental data. Specific ligand/protein CH-π and Van der Waals interactions were found to be determinant for the stability of the complexes and for defining specificity. Using the order parameters derived from backbone dynamics analysis in the presence and absence of ligand and at 25 and 50 ºC, we determined that the protein’s backbone conformational entropy is slightly positive. This data in combination with the negative binding entropy calculated from ITC studies supports a selection mechanism where a rigid protein selects a defined oligosaccharide conformation.

Corvo, Marta C., João Sardinha, Sonia C. Menezes, Sandra Einloft, Marcus Seferin, Jairton Dupont, Teresa Casimiro, and Eurico J. Cabrita. "Solvation of CO2 in [C4mim][BF4] and [C4mim][PF6] ionic liquids revealed by High Pressure NMR." Angewandte Chemie International Edition. 49.52 (2013): 13024-13027.Website
Baptista, Susana, Maria Isabel Gomes, and Ana Paula Barbosa-póvoa. "A stochastic model for a multi-period multi-product closed loop supply chain." XVI Congresso da Associação Portuguesa de Investigação Operacional IO 2013. Bragança, Portugal 2013. 27-37. Abstract2013_baptistagomesbpovoa_io2013.pdf

In this work we propose a stochastic model for the design and planning of closed-loop supply chains.
Uncertainties in demand and return volumes are modelled together with uncertain transportation
costs. A two-stage stochastic programming is developed and a sensitivity analysis to the worst-case
probability is performed in order to test the solution robustness. Finally, in order to prove the
goodness of the stochastic approach, the value of the stochastic solution and the value of perfect
information are computed. An example based on a real case shows the model applicability.

Morgado, Carmen, and Fernanda Barbosa. "A Structured Approach to Problem Solving in CS1/2." International Journal of Advanced Computer Science. Vol. 3.(7) (2013): ISSN: 2251-6379.
Santos, Susana, Débora Azeitona, Nuno Lapa, João Morais, Helena Lopes, and Benilde Mendes Study on the effect of thermal pre-treatments in the thermophilic anaerobic digestion of a potato peel waste. Proceedings of the International Anaerobic Digestion Symposium within the BioGasWorld 2013. Berlin, Germany: German Society for Sustainable Biogas and Bioenergy Utilisation, 2013. Abstractbiogas_world_2013_santos_et_al_2013.pdf

This work aimed to study the effect of different pre-treatments applied to a potato peel residue, in a thermophilic Anaerobic Digestion (AD) process. All samples were subjected to a mechanical pre-treatment through milling to a particle size below 2 mm. The thermal pre-treatments applied consisted of autoclaving the residue at a gauge pressure of 1.2 bar, under a temperature of 122°C, and for 20, 35 and 55 minutes: assays E122.20, E122.35 and E122.55, respectively. The control assay was performed on a ground residue, which was not submitted to any thermal pre-treatment. All pre-treated residues were subjected to an AD process in a CSTR reactor at 49±1°C. The experimental data showed that the highest methane percentages were very similar (about 92% v/v) for all samples submitted to the thermal pre-treatments. For the control assay, the highest percentage of methane was 87.9% (v/v). The highest biogas yields were recorded in the trial E122.35 (646±50 cm3.g-1 CODremoved), against only 250±20 cm3.g-1 CODremoved for the control assay. The highest biogas yields for VSremoved were attained in the assays E122.55 and E122.35, with values of 646±48 cm3.g-1 VSremoved and 634±59 cm3.g-1 VSremoved, respectively. Globally, the yields registered for the assay E122.35 were similar to those determined in the assay E122.55. Due to the lower energy consumption during the pre-treatment performed in the assay E122.35, this was considered to be the most suitable pre-treatment for this type of residue.

Geraldes, I., and M. P. Amado Sustainability of the construction of social housing with recourse to LSF. 2º CIHEL 2013 . Lisboa, PT: LNEC, ISBN: 978-178-032-381-7, 2013.
Sousa, P., and M. P. Amado Sustainable Construction - Contributions to a Certification System Lusophone. 2º CIHEL 2013 . Lisboa, PT: LNEC, ISBN: 978-178-032-381-7, 2013.
Amado, M. P., L. Vanessa, and M. R. Ribeiro Sustainable Construction: Value of Certification. The International Conference on Advances in Civil, Structural and Environmental Engineering . Zurich, CH: ACSEE, ISBN: 978-981-07-7965-8, doi:10.3850/ 978-981-07-7965-8_83 , 2013.
Amado, Miguel P., and L. Barroso. "SUSTAINABLE CONSTRUCTION: WATER USE IN RESIDENTIAL BUILDINGS IN PORTUGAL." International Journal of Sustainable Construction Engineering and Technology ISSN: 2180-3242. 4.2 (2013): 14-22.
Serra, H., N. Paulino, and J. Goes A Switched-Capacitor Band-Pass Biquad Filter Using a Simple Quasi-unity Gain Amplifier. Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS’2013). Caparica, Portugal: IFIP Advances in Information and Communication Technology, 2013.
Casimiro, MH, Marta C. Corvo, A. M. Ramos, E. J. Cabrita, A. M. Ramos, and LM Ferreira. "Synthesis and characterization of novel γ-induced porous PHEMA–IL composites." Materials Chemistry and Physics. 138.1 (2013): 11-16. AbstractWebsite

A novel porous polymer-ionic liquid composite with poly(2-hydroxyethyl methacrylate) (PHEMA) and 1-butyl-3-methylimidazolium hexafluorophosphate (BMIPF6) has been synthesized by γ-irradiation without heat or chemical initiators. The products can be reversibly converted into organogels. The composites are potential candidates for electrochemical applications. The use of γ-radiation can be a simple and versatile alternative way to obtain these materials.

Ferrão, Lúcio Emanuel Represas, Seco João Ricardo Viegas Da Costa, Caires Luis Manuel Marques Da Costa, Caleira Borrêga, Gonçalo Filipe Xavier, António Augusto Vieira Melo, and OutSystems-Software em Rede SA SYSTEMS, METHODS, AND APPARATUS FOR MODEL-BASED SECURITY CONTROL., 2013. Abstract

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Ramos, Tânia, Maria Isabel Gomes, and Ana Paula Barbosa-póvoa. "Tactical and Operational Planning in Reverse Logistics Systems with Multiple Depots." XVI Congresso da Associação Portuguesa de Investigação Operacional IO 2013. Bragança, Portugal 2013. 286-295.2013_ramosgomesbpovoa_io2013.pdf
Rocha, H. Teacher knowledge and the implementation of investigation tasks. Proceedings of the 37th Conference of the International Group for the Psychology of Mathematics Education. Kiel, Germany: PME, 2013.
Brusatte, S. L., R. J. Butler, O. Mateus, J. S. Steyer, and J. H. Whiteside Terrestrial vertebrates from the Late Triassic of Portugal: new records of temnospondyls and archosauriforms from a Pangaean rift sequence. 61st Symposium on Vertebrate Palaeontology and Comparative Anatomy. Edinburgh, 2013. Abstractbrusatte_et_al_2013_triassic_algarve_portugal_temnospondyls_svpca.org_years_2013_edinburgh_abstracts.pdf

The Late Triassic (ca. 237-201.5 million years ago) was a transitional interval in the evolution of terrestrial ecosystems, during which ‘modern’ clades such as archosaurs and mammals were radiating while ‘archaic’ groups such as temnospondyl amphibians and basal synapsids remained abundant. Little is known about the Triassic terrestrial (nonmarine) vertebrates of the Iberian Peninsula. The Algarve Basin of southern Portugal is an extensional rift basin formed during the breakup of Pangaea, which is filled with terrestrial, lacustrine, and marginal marine siliciclastics of the Grés de Silves Formation, interbedded with CAMP basalts that mark the end-Triassic extinction (radioisotopically dated to ~198-201.5 Ma). Since 2009, our field project in the Algarve has discovered numerous vertebrate specimens within the Grés de Silves, including a monodominant bonebed containing hundreds of specimens of metoposaurids, a peculiar group of temnospondyls that filled crocodile-like predatory niches in lacustrine and fluvial environments. These specimens appear to belong to a new species of Metoposaurus, similar to M. diagnosticus and M. krasiejowensis from central Europe but possessing several putative autapomorphies of the braincase and lower jaw. We also discovered a mandible of a phytosaur, the first specimen of these long-snouted, semi-aquatic archosauriforms from the Iberian Peninsula. These discoveries of characteristic Carnian Norian taxa indicate that the fossil-bearing portion of the Grés de Silves is Late Triassic in age, and provide further evidence that metoposaurids and phytosaurs commonly occurred together in low palaeolatitudes during this time.

Ribeiro, V., F. Holwerda, and O. Mateus. "Theropod egg sites from the Lourinhã Formation, Portugal." Journal of Vertebrate Paleontology, Program and Abstracts, 2013 (2013): 198.ribeiro_et_al_2013_theropod_egg_sites_lourinha_svp_meeting_abstracts_213.pdf
Mota, Bruna, Maria Isabel Gomes, and Ana Paula Barbosa-póvoa. "Towards supply chain sustainability: balancing costs with environmental and social impacts." Computer Aided Process Engineering. Eds. Andrzej Kraslawski, and Ilkka Turunen. Elsevier, 2013. 895-900. Abstract2013_motagomesbpovoa_escape23.pdf

This work presents a multi-objective optimization methodology that accounts for economic, environmental and social concerns in a supply chain with reverse flows. Environmental impact assessment is considered through the use of Recipe 2008. A social benefit indicator is developed where the creation of employment in less developed regions is preferred. The multi-objective approach is used to reach a solution of compromise between the three sustainability pillars. The model is applied to a case study developed in collaboration with a Portuguese company, leader in battery production.