A5089654597- Organometallic Complex Synthesis and Catalysis
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- biodegradable polymer synthesis and properties
- Carbon dioxide utilization in catalysis
- Polyoxometalates: Synthesis and Applications
- Synthetic Organic Chemistry Methods
- Polymer Nanocomposite Synthesis and Irradiation
- Knee injuries and reconstruction techniques
- Web Data Mining and Analysis
- Advanced Image and Video Retrieval Techniques
- Intracranial Aneurysms: Treatment and Complications
- Advanced Sensor and Energy Harvesting Materials
- Robotics and Sensor-Based Localization
- Advanced Database Systems and Queries
- Mesoporous Materials and Catalysis
- Vascular Malformations Diagnosis and Treatment
- Advanced Vision and Imaging
- Graphene and Nanomaterials Applications
- Zeolite Catalysis and Synthesis
- Conducting polymers and applications
- Organoboron and organosilicon chemistry
- Nonlinear Optical Materials Research
- Electronic Packaging and Soldering Technologies
- Chemical Thermodynamics and Molecular Structure
Centre Orthopédique Santy
2023
University of Lisbon
2002-2022
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2022
University of Aveiro
2015-2020
Instituto Superior Técnico
2005-2019
Institute for Biotechnology and Bioengineering
2015
Laboratoire de Chimie des Polymères Organiques
2013
Instituto Politécnico de Lisboa
2009-2012
Hospital de Santa Maria
2003-2012
Instituto de Estructura de la Materia
1988
Novel heteroscorpionate-containing titanium complexes, TiCl3(bdmpza) and TiCl2(bdmpza){O(CH2)4Cl} (bdmpza = bis(3,5-dimethylpyrazol-1-yl)acetate), have been prepared. Toluene solutions of these complexes with methylaluminoxane catalyze the polymerization ethylene show a high catalytic activity.
The synthesis of self-reinforced polyethylene-based materials prepared by in-situ polymerisation is described. methodology developed uses MCM-41 mesoporous material in a triple role: as catalyst carrier for ethylene within its pores and channels first stage, nanofiller the formed polyethylene matrix during useful lifetime and, finally, promoter long-term waste disposal. As evidenced FTIR analysis, when polymer under these confined conditions different interactions between occur, compared to...
Abstract The ring‐opening polymerization (ROP) of trimethylene carbonate (TMC) initiated by a monoalcohol and catalyzed CH 3 SO H is investigated, in an effort to reveal extra features the known activated monomer/active chain‐end (AM/ACE) combined mechanism. Size‐exclusion chromatography (SEC) profiles obtained with high‐molar‐mass samples show poly(trimethylene carbonate) (PTMC) fraction generated AM/ACE molar mass that exactly twice PTMC coming from pure AM. Conversely, prepared diol...
Poly(lactic acid) (PLA) stereocomplex (SC) crystallites produced at room temperature directly from high molecular weight PLLA by incorporation of choline dihydrogen phosphate ([Ch][DHP]) can display intrinsic piezoelectricity.
Abstract The synthesis and characterisation of several functionalised polyethylenes, obtained by direct copolymerisation ethylene with 10‐undecenoic acid (UA), have been carried out. Two metallocene complexes C s symmetry different bridges were used: a dimethylsilyl bridge complex Me 2 Si(Cp)(Flu)ZrCl phenylidene Ph C(Cp)(Flu)ZrCl . For comparison, results the Cp ZrCl /MAO system are also reported. activity depends strongly on added amount UA comonomer. High incorporation levels up to 7.3...
Pose estimation is one of the most important problems in computer vision. It can be divided two different categories - absolute and relative may involve types camera models: central non-central. State-of-the-art methods have been designed to solve separately these problems. This paper presents a unified framework that able any pose problem by alternating optimization techniques between set parameters, rotation translation. In order make this possible, it necessary define an objective...
The dipolar relaxation mechanisms present in solid chloropentamethylbenzene have been studied using the technique of thermally stimulated discharge currents (TSDC). A peak observed at ca. −150 °C has attributed to onset reorientational freedom crystal and is believed correspond transition between an ordered phase a rotationally disordered phase. At higher temperatures, 10 °C, another appears TSDC spectrum chloropentamethylbenzene, whose assignment molecular level not yet completely...
The crucial question - treat or not a brain arteriovenous malformation has been the object of many studies, sometimes contradictory. authors analyse retrospectively, clinically and angiographically, results intra-arterial embolization in treatment 106 patients with malformation. endo- vascular therapy was palliative curative 46% cases, 30% pre-surgery 18% intra- arterial occlusion pre-radiosurgery. In 6% therapeutic protocol included surgery radiosurgery. Cyanocrylate used 89% 10% embolic...
Abstract Ethylene‐ co ‐(5,7‐dimethylocta‐1,6‐diene) copolymers with various 5,7‐dimethylocta‐1,6‐diene contents incorporate double bonds in the lateral chains that facilitate development of crosslinkings resulting polymeric material after electron beam irradiation. As an effect such irradiation, crystallization is delayed but crystallinity remains practically constant melting and further cooling irradiated specimens. Crystallinity, crystallite thickness gel content are key parameters...
Objectives: The primary objective of this study was to determine the failure rate (defined by secondary meniscectomy) ramp repairs performed at time anterior cruciate ligament reconstruction (ACLR). investigate association patient and surgical characteristics with risk failure. Methods: A retrospective analysis prospectively collected data performed. All patients who underwent repair a meniscal lesion through posteromedial portal ACLR, between January 2013 December 2020, were considered for...