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These ... [more ▼]The deposition of proteins in the form of amyloid fibrils is the characteristic feature of more than 20 medical conditions affecting the central nervous system or a variety of peripheral tissues. These disorders, which include Alzheimer's disease, the prion diseases and type II diabetes, are of enormous importance in the context of present-day human health and welfare. Extensive research is therefore being carried out to define the molecular details of the mechanism of the pathological conversion of amyloidogenic proteins from their soluble forms into fibrillar structures. This review focuses on recent studies that demonstrate the power of using antibodies or antibody fragments to probe the process of fibril formation, and discusses the emerging potential of these species as diagnostic and therapeutic agents. [less ▲]Detailed reference viewed: 19 (1 ULg) Probing the phase of the elastic $pp$ scattering amplitude with vortex proton beamsIvanov, Igor in AIP Conference Proceedings (2013)We show that colliding vortex proton beams instead of (approximate) plane waves can lead to a direct measurement of how the overall phase of the scattering amplitude changes with the scattering angle. In ... [more ▼]We show that colliding vortex proton beams instead of (approximate) plane waves can lead to a direct measurement of how the overall phase of the scattering amplitude changes with the scattering angle. In elastic $pp$ scattering, this will open a novel way to measure the parameter $\rho(t)$ and probe the real part of the Pomeron. [less ▲]Detailed reference viewed: 9 (1 ULg) Probing the properties of convective cores through g modes: high-order g modes in SPB and γ Doradus starsMiglio, Andrea ; Montalban Iglesias, Josefa ; Noels-Grötsch, Arlette et alin Monthly Notices of the Royal Astronomical Society (2008), 386(3), 1487-1502In main-sequence stars, the periods of high-order gravity modes are sensitive probes of stellar cores and, in particular, of the chemical composition gradient that develops near the outer edge of the ... [more ▼]In main-sequence stars, the periods of high-order gravity modes are sensitive probes of stellar cores and, in particular, of the chemical composition gradient that develops near the outer edge of the convective core. We present an analytical approximation of high-order g modes that takes into account the effect of the μ gradient near the core. We show that in main-sequence models, similarly to the case of white dwarfs, the periods of high-order gravity modes are accurately described by a uniform period spacing superposed to an oscillatory component. The periodicity and amplitude of such component are related, respectively, to the location and sharpness of the μ gradient. We investigate the properties of high-order gravity modes for stellar models in a mass domain range between 1 and 10M[SUB]solar[/SUB], and the effects of the stellar mass, evolutionary state and extra-mixing processes on period spacing features. In particular, we show that for models of a typical Slowly Pulsating B (SPB) star, a chemical mixing that could likely be induced by the slow rotation observed in these stars is able to significantly change the g-mode spectra of the equilibrium model. Prospects and challenges for the asteroseismology of γ Doradus and SPB stars are also discussed. [less ▲]Detailed reference viewed: 7 (0 ULg) Probing the stereoselectivity of the ruthenium-catalyzed ring-opening metathesis polymerization of norbornene and norbornadiene diestersDelaude, Lionel ; Demonceau, Albert ; Noels, Alfred in Macromolecules (2003), 36(5), 1446-1456The ring-opening metathesis polymerization (ROMP) of two optically active 2,3-dicarboalkoxynorbornadienes derived from (S)-(-)-2-methyl-1-butanol and (R)-(-)-2-butanol were carried out in the presence of ... [more ▼]The ring-opening metathesis polymerization (ROMP) of two optically active 2,3-dicarboalkoxynorbornadienes derived from (S)-(-)-2-methyl-1-butanol and (R)-(-)-2-butanol were carried out in the presence of the [RuCl2(P-cymene)](2) catalyst precursor activated by trimethylsilyldiazomethane (TMSD). H-1 and C-13 NMR analyses showed that a high degree of stereoregularity was achieved, and homonuclear proton-proton COSY spectroscopy indicated that the major trans fractions of the polymers were most likely isotactic, while the minor cis fractions were syndiotactic. Ring-opened metathesis polymers were also made from 2,3-dicarbomethoxynorbornadiene and exo,exo-2,3-dicarbomethoxy-5-norbornene. They were hydrogenated into the corresponding polynorbornanes using diimide. The NMR spectra of the reduced materials confirmed that the unsaturated parent polymers had an all-trans highly isotactic microstructure. A tentative mechanism involving arene loss, carbene formation, and monomer chelation is proposed to account for the observed stereoselectivities. [less ▲]Detailed reference viewed: 7 (0 ULg) Probing the Surface Molecular Structure in the UPS Spectra of Octadecanethiol and 1-Cyclohexyl-12-dodecanethiol Self-Assembled on GoldDuwez, Anne-Sophie ; Riga, Joseph; Han, Bo-Ying et alin Journal of Electron Spectroscopy & Related Phenomena (1996), 81Detailed reference viewed: 3 (0 ULg) Probing the tacticity of ring-opened metathesis polymers of norbornene and norbornadiene diesters by NMR spectroscopyDelaude, Lionel ; Demonceau, Albert ; Noels, Alfred in Bencze, Laszlo; Imamoglu, Yavuz (Eds.) Novel metathesis chemistry: designing well-defined initiator systems for specialty chemical synthesis, tailored polymers and advanced material application (2003)This chapter summarizes the various NMR experiments that were applied to probe the main stereochemical features of polymers prepared by ring-opening metathesis polymerization (ROMP) of 2,3 ... [more ▼]This chapter summarizes the various NMR experiments that were applied to probe the main stereochemical features of polymers prepared by ring-opening metathesis polymerization (ROMP) of 2,3-dicarboalkoxynorbornadienes and 2,3-dicarboalkoxynorbornenes catalyzed by the dichloro ruthenium arene dimer (RuCl2(p-cymene))2 in the presence of trimethylsilyldiazomethane (TMSD). Direct spectroscopic methods based on the examination of cross-coupling peaks in polymers derived from optically active monomers (1H COSY NMR) and indirect methods based on the analysis of the hydrogenated derivatives of unsaturated parent polyolefins (1H and 13C NMR) led to the same conclusion. They both showed that high trans, highly isotactic polymers were formed using the ruthenium-arene catalyst precursor. [less ▲]Detailed reference viewed: 27 (0 ULg) Probing thermoplastic matrix-carbon fiber interphases. 1. Preferential segregation of low molar mass chains to the interfaceCarlier, V.; Sclavons, M.; Jonas, Alain M et alin Macromolecules (2001), 34(11), 3725-3729The molecular mobility of polystyrene (PS) chains near the surface of carbon fibers was investigated. The glass transition temperature of very thin coatings deposited on carbon fibers was measured by ... [more ▼]The molecular mobility of polystyrene (PS) chains near the surface of carbon fibers was investigated. The glass transition temperature of very thin coatings deposited on carbon fibers was measured by supported DMTA in order to probe the properties of the thermoplastic interphase. Depending on the fiber impregnation method from the melt or from solution, Tg changed in an opposite way for the thinnest coatings, decreasing with coating thickness in the case of impregnation in the melt and increasing when a polymer solution was used. This observation is explained by degradation of PS in the melt and subsequent preferential segregation of low molar mass chains to the interface. This conclusion is supported by the study of the Tg of coatings made from a bimodal molar mass distribution. [less ▲]Detailed reference viewed: 24 (0 ULg) Probing ultrafast purely electronic charge migration in small peptidesRemacle, Françoise ; Levine, R. D.in Zeitschrift Fur Physikalische Chemie-International Journal Of Research In Physical Chemistry & Chemical Physics (2007), 221(5), 647-661A pump-probe experiment that can examine a pure charge migration on a time scale short compared to the onset of nuclear motion is discussed. The mass spectrometric studies of Schlag et al. suggest that ... [more ▼]A pump-probe experiment that can examine a pure charge migration on a time scale short compared to the onset of nuclear motion is discussed. The mass spectrometric studies of Schlag et al. suggest that short peptide terminated by an aromatic amino acid are particularly suitable test compounds. The pump pulse needs to ionize the molecule on a time scale short compared to the period of the electronic motion, typically sub-fs. However, ionization occurs preferentially when the electrical field of the light is maximal so that the duration of the pulse envelope can be somewhat longer. Detection by photoelectron spectrometry of the peptide cation, to produce a dication, is shown to be able to probe the electronic rearrangement. [less ▲]Detailed reference viewed: 43 (6 ULg) Probiotic bacterial molecules and their use in methods to treat/prevent infection by harmful bacteria and to provide nutritional healthGriffiths, Mansel; Medellin-Pena, Maira; Delcenserie, Véronique Patent (2011)Detailed reference viewed: 24 (7 ULg) Probiotics and health claims in EuropeDelcenserie, Véronique Conference (2013, November 05)Detailed reference viewed: 24 (4 ULg) Problem and challenges of image-guided neurosurgical navigation and interventionVerly, Jacques ; Kavec, Martin; Vigneron, Lara M. et alConference (2006)Detailed reference viewed: 4 (0 ULg) Problem Based Learning in SLT education : Apprentissage de la Démarche Logopédique (Learning of SLT approach)Sadzot, Agnès ; Maillart, Christelle Poster (2009, May)Detailed reference viewed: 61 (18 ULg) A problem checklist and the clinical resumeGraitson, M.; Gaspard, Ulysse ; Moonen, Gustave et alin Revue Médicale de Liège (1983), 38(23), 897-905Detailed reference viewed: 11 (0 ULg) The problem of a drillstring inside a curved borehole: a perturbed Eulerian approachDenoël, Vincent ; Detournay, Emmanuel (2009, February)Detailed reference viewed: 123 (12 ULg) The problem of aphasia in the assessment of consciousness in brain damaged patients.Majerus, Steve ; Bruno, Marie-Aurélie ; Schnakers, Caroline et alin Progress in Brain Research (2009), 177Detailed reference viewed: 60 (13 ULg) Problem of applying sodium selenate to increase selenium concentrations in grassland plant in Southern BelgiumHambuckers, Alain ; Dotreppe, Olivier ; Istasse, Louis in Communications in Soil Science & Plant Analysis (2010), 41Detailed reference viewed: 64 (24 ULg) The problem of odours when drying sewage sludgesLéonard, Angélique ; Nicolas, Jacques ; Romain, Anne-Claude et alConference (2008, June)Detailed reference viewed: 49 (23 ULg) The problem of rutting in asphalt pavement in Belgium: how to resolve this problem with steel and synthetic fibers ?Courard, Luc ; Rigo, Jean-Marie in Iliescu, M. (Ed.) Proceedings of Constructions 2000 (1993)Detailed reference viewed: 12 (0 ULg) The problem of the consumer may be the solution. Sustainable production from the consumers perspective: the emergence of the "Gaume grassland steer" in BelgiumStassart, Pierre M in Stassart, Pierre M (Ed.) Proceedings of the "Sustainable Consumption Alternative Agrifood Systems (2008)This paper examines the question of sustainable consumption through the consumer’s contribution to the various dimensions of sustainability. The consumer’s participation reveals legitimacy conflicts in ... [more ▼]This paper examines the question of sustainable consumption through the consumer’s contribution to the various dimensions of sustainability. The consumer’s participation reveals legitimacy conflicts in the process of designing new production systems. The different dimensions of sustainability can be linked to different legitimacy models. When the building of new systems entails a concerted process involving dialogue and deliberation among stakeholders from the agricultural and environmental sectors, various legitimacy principles are mobilized and confront each other through the spokespeople who represent the interests involved. This specific case concerns beef produced from the ”Gaume grassland steer,” a system that can be characterized as agroecological and territorial. The consumers who were involved contributed, through deliberative processes, to the coexistence of various legitimacy principles and stakeholder cooperation. This capacity could be linked to their multiple and fuzzy identities because their identities were shown to be flexible, changing with the institutional setting, which was sometimes consumer-oriented and sometimes territory-driven. This allowed them to act as mediators between environmentalists and farmers. To do this they had to be able to accept the limits of each legitimacy principle and contest the possibility of imposing only one principle on all the others. In so doing they helped the heterogeneous actors to reach compromises by referring to a kind of patrimonial common good. [less ▲]Detailed reference viewed: 36 (0 ULg) The problem of the rare earths in α2 Canum VenaticorumStruve, Otto; Swings, Polydore in Publications of the American Astronomical Society (1946), 10Detailed reference viewed: 5 (0 ULg)